Mathlib triage dashboard

Welcome to the PR triage page! This page is perfect if you intend to look for pull request which seem to have stalled.
Feedback on designing this page or further information to include is very welcome.

This dashboard was last updated on: May 22, 2026 at 22:03 UTC

Quick links: PR statistics | Not yet landed PRs | Review status | Needs triage: unassigned PRs | Needs triage: assigned PRs | Likely-spurious CI failures | Tech debt PRs | PRs blocked on a zulip discussion | PRs with just a merge conflict | Stale new contributor PRs | PRs not into master | PRs with an 'approved' review | All open PRs | Other lists of PRs

Overall statistics

Found 2595 open PRs overall. Among these PRs

Approved, not yet landed PRs

At the moment,

Review status

There are currently 490 PRs awaiting review. Among these,

On the other hand, 150 PRs are unassigned and have not seen a status change in three days, and 31 PRs are assigned and have seen no review movement in two weeks.

These are triage-oriented views, not the main review queue. Updating a PR may remove it from one of these lists, but does not remove it from the review queue unless the PR's status changes out of awaiting review.

Needs triage: unassigned PRs on the review queue

Number Author Title Description Labels +/- Modified files (first 100) 📝 💬 All users who commented or reviewed Assignee(s) Approval(s) Updated Last status change total time in review
34952 joneugster
author:joneugster
 feat(scripts/autolabel): use `Cli` and integrate `curl` call into `autolabel` - use `Cli` for `lake exe autolabel` - add arguments `--pr xxx --gh` and `--pr xxx --curl ` to chose between different interaction methods with github - add `--force` to skip the check whether labels are already present. (note: the current `curl` setup doesn't perform this step and neither does the refactor, so I added a `Todo` to remember this. ) - make CI-workflow simpler and more robust by removing current stdout-parsing of the debug-messages which `autolabel` emits. ### Testing Make some local changes and commit them. Ensure your local `origin/master` is in sync with `upstream/master` if you are on a fork. - `lake exe autolabel`: prints the labels which would be applicable - `lake exe autolabel --pr 34952 --gh --force` adds these labels to this PR using `gh`. - `lake exe autolabel --pr 34952 --gh` adds these labels to this PR using `gh` if no topic labels are present. - `lake exe autolabel --pr 34952 --curl ` adds these labels to this PR using `curl`. This requires a github access token for authentication --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) CI 85/72 .github/workflows/add_label_from_diff.yaml,scripts/autolabel.lean 2 4 ['github-actions', 'mathlib-merge-conflicts'] nobody none
70-75780
2 months ago
54-36389
54 days ago
86-76939
86 days
36764 euprunin
author:euprunin
 chore: golf using `grind` The goal of this PR is to decrease the number of times lemmas are called explicitly. Any decrease in compilation time is a welcome side effect, although it is not a primary objective. Trace profiling results (differences <30 ms considered measurement noise): * `DirectSum.lequivCongrLeft_lof`: unchanged 🎉 * `AnalyticOnNhd.preimage_mem_codiscreteWithin`: unchanged 🎉 * `mem_permsOfList_of_mem`: unchanged 🎉 * `PNat.mod_le`: unchanged 🎉 * `Computation.map_parallel`: unchanged 🎉 * `Sigma.curry_update`: unchanged 🎉 Profiled using `set_option trace.profiler true in`. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) 11/41 Mathlib/Algebra/DirectSum/Module.lean,Mathlib/Analysis/Analytic/IsolatedZeros.lean,Mathlib/Data/Fintype/Perm.lean,Mathlib/Data/PNat/Basic.lean,Mathlib/Data/Seq/Parallel.lean,Mathlib/Data/Sigma/Basic.lean 6 13 ['chenson2018', 'euprunin', 'github-actions', 'mathlib-merge-conflicts'] nobody none
41-52895
1 month ago
41-52955
41 days ago
66-24446
66 days
37055 euprunin
author:euprunin
 chore: golf using `grind` The goal of this PR is to decrease the number of times lemmas are called explicitly. Any decrease in compilation time is a welcome side effect, although it is not a primary objective. Trace profiling results (differences <30 ms considered measurement noise): * `OreLocalization.smul'_char`: unchanged 🎉 * `Equiv.Perm.cycleOf_mem_cycleFactorsFinset_iff`: unchanged 🎉 * `StrictMono.ite'`: unchanged 🎉 * `Mathlib.Meta.NormNum.isInt_ediv`: unchanged 🎉 Profiled using `set_option trace.profiler true in`. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) 10/29 Mathlib/GroupTheory/OreLocalization/Basic.lean,Mathlib/GroupTheory/Perm/Cycle/Factors.lean,Mathlib/Order/Monotone/Basic.lean,Mathlib/Tactic/NormNum/DivMod.lean 4 11 ['chenson2018', 'euprunin', 'github-actions'] nobody none
41-50535
1 month ago
41-50596
41 days ago
59-47892
59 days
37865 Jun2M
author:Jun2M
 feat(Combinatorics/Graph): Edge cut of `Graph` This PR introduces - `edgeCut`: A function on set of vertices that returns the set of edges with exactly one end in the set. - `IsEdgeCut`: A predicate for set of edges that promises it is `edgeCut` of some set. - `IsBridge`: An edge `e` is a bridge iff it is a singleton edge cut. - `IsBond`: An edge Set `B` is bond iff it is minimal nonempty edge cut. --- - [x] depends on: #35879 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-combinatorics 194/0 Mathlib/Combinatorics/Graph/Connected/EdgeCut.Lean,Mathlib/Combinatorics/Graph/Subgraph.lean 2 2 ['github-actions', 'mathlib-dependent-issues'] nobody none
37-7264
1 month ago
37-24921
37 days ago
37-25071
37 days
37420 artie2000
author:artie2000
 refactor: change definitions to avoid `ConvexCone` Change the definitions of `PointedCone.positive` and `PointedCone.closure` to avoid mentioning `ConvexCone`. This PR is part of a series deprecating `ConvexCone`: https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/Replacing.20.60ConvexCone.60.20with.20.60PointedCone.60/with/582738985 --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-convex-geometry maintainer-merge 10/4 Mathlib/Analysis/Convex/Cone/Closure.lean,Mathlib/Geometry/Convex/Cone/Pointed.lean 2 3 ['YaelDillies', 'github-actions', 'mathlib-merge-conflicts', 'ooovi', 'vihdzp'] nobody 3
36-36833
1 month ago
36-36797
36 days ago
51-57072
51 days
36774 euprunin
author:euprunin
 chore: replace long terminal `rw […]`:s (≥4 lemmas) with bare `simp`:s The goal of this PR is to decrease the number of times lemmas are called explicitly. Any decrease in compilation time is a welcome side effect, although it is not a primary objective. Trace profiling results (differences <30 ms considered measurement noise): * `Finset.lcm_union`: unchanged 🎉 * `Finset.gcd_union`: unchanged 🎉 * `Polynomial.derivative_eval₂_C`: unchanged 🎉 * `Polynomial.expand_pow`: unchanged 🎉 * `Cardinal.mk_real`: unchanged 🎉 * `Real.log_zpow`: unchanged 🎉 * `Matroid.eRank_le_encard_add_eRk_compl`: unchanged 🎉 * `DFinsupp.single_tsub`: unchanged 🎉 * `EReal.inv_neg`: unchanged 🎉 * `Finsupp.toMultiset_map`: unchanged 🎉 * `Finsupp.single_tsub`: unchanged 🎉 * `Multiset.countP_map`: unchanged 🎉 * `Nat.ascFactorial_eq_factorial_mul_choose'`: unchanged 🎉 * `Real.sign_intCast`: unchanged 🎉 * `Real.volume_eball`: unchanged 🎉 * `Real.volume_closedEBall`: unchanged 🎉 * `LFunction_ne_zero_of_not_quadratic_or_ne_one`: 295 ms before, 152 ms after 🎉 * `hasSum_one_div_nat_pow_mul_cos`: unchanged 🎉 * `inv_eq_of_aeval_divX_ne_zero`: unchanged 🎉 * `AlgebraicIndependent.aeval_comp_mvPolynomialOptionEquivPolynomialAdjoin`: unchanged 🎉 * `Ordinal.deriv_mul_eq_opow_omega0_mul`: unchanged 🎉 Profiled using `set_option trace.profiler true in`. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) 22/24 Mathlib/Algebra/GCDMonoid/Finset.lean,Mathlib/Algebra/Polynomial/Derivative.lean,Mathlib/Algebra/Polynomial/Expand.lean,Mathlib/Analysis/Real/Cardinality.lean,Mathlib/Analysis/SpecialFunctions/Log/Basic.lean,Mathlib/Combinatorics/Matroid/Rank/ENat.lean,Mathlib/Data/DFinsupp/Order.lean,Mathlib/Data/EReal/Inv.lean,Mathlib/Data/Finsupp/Multiset.lean,Mathlib/Data/Finsupp/Order.lean,Mathlib/Data/Multiset/Filter.lean,Mathlib/Data/Nat/Choose/Basic.lean,Mathlib/Data/Real/Sign.lean,Mathlib/MeasureTheory/Measure/Lebesgue/Basic.lean,Mathlib/NumberTheory/LSeries/Nonvanishing.lean,Mathlib/NumberTheory/ZetaValues.lean,Mathlib/RingTheory/Algebraic/Basic.lean,Mathlib/RingTheory/AlgebraicIndependent/Basic.lean,Mathlib/SetTheory/Ordinal/FixedPoint.lean 19 2 ['artie2000', 'euprunin', 'github-actions'] nobody 1
36-9104
1 month ago
66-17630
66 days ago
66-17342
66 days
38185 Jun2M
author:Jun2M
 feat(Order/Partition): operations over Frame This PR introduces: * `Partition.induce`: The induce of a partition by a frame element. * `Partition.disjUnion`: The disjoint union of two partitions. * `Partition.bind`: The finer partition obtained by family of partitions for each part of the original partition. Co-authored-by: Peter Nelson --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-order 89/11 Mathlib/Order/Partition/Basic.lean,Mathlib/Order/SupIndep.lean 2 1 ['github-actions'] nobody none
35-3599
1 month ago
35-3671
35 days ago
35-3383
35 days
38245 RemyDegenne
author:RemyDegenne
 feat: CountableSupClosed Define the property for a set of being closed by countable supremum (resp. infimum). The new file is adapted from the `SupClosed` file, which describes sets closed by binary supremum. Also use `to_dual` on `SupClosed`. `CountableInfClosed` will be used in measure theory, for developments related to compact systems used for Kolmogorov's extension theorem and Choquet's capacitability theorem. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-order brownian 308/66 Mathlib.lean,Mathlib/Order/CountableSupClosed.lean,Mathlib/Order/SupClosed.lean 3 14 ['RemyDegenne', 'b-mehta', 'github-actions', 'vihdzp'] nobody none
33-21385
1 month ago
33-35635
33 days ago
33-40071
33 days
32282 jsm28
author:jsm28
 feat(Geometry/Euclidean/Angle/Incenter): unoriented angle bisection Add lemmas giving unoriented angles involving the incenter and excenters of a triangle as expressions involving dividing angles of the triangle by 2, deduced from oriented bisection lemmas. --- - [ ] depends on: #30981 - [ ] depends on: #30982 - [ ] depends on: #31205 - [ ] depends on: #32019 - [ ] depends on: #32021 - [ ] depends on: #32259 - [ ] depends on: #32260 - [ ] depends on: #32270 - [ ] depends on: #32273 - [ ] depends on: #32278 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-euclidean-geometry 98/0 Mathlib/Geometry/Euclidean/Angle/Incenter.lean 1 8 ['github-actions', 'jsm28', 'mathlib-dependent-issues', 'mathlib4-merge-conflict-bot', 'wwylele'] nobody 1
32-75788
1 month ago
56-13340
56 days ago
56-13788
56 days
38356 SnirBroshi
author:SnirBroshi
 feat(Order/ConditionallyCompleteLattice/Finset): `sSup s ≠ ⊤` in a `CompleteLinearOrder` for a finite set without `⊤` --- btw `to_dual` here is blocked on #35213 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-order 20/0 Mathlib/Order/ConditionallyCompleteLattice/Finset.lean 1 1 ['github-actions'] nobody none
30-72857
1 month ago
30-72932
30 days ago
30-72644
30 days
38325 Jun2M
author:Jun2M
 feat(Combinatorics/Graph): EndPoint function This PR introduces `endPoints`: `Set` of incident vertices, given an edge (in the case of non-edge, return empty). **Import change**: `Graph/Basic` now imports `Data/Set/Card` to allow reasoning about card of `endPoints`. [Relavent Zulip thread](https://leanprover.zulipchat.com/#narrow/channel/513188-CSLib/topic/New.20graph.20definitions/with/588616269) --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-combinatorics large-import 83/3 Mathlib/Combinatorics/Graph/Basic.lean 1 9 ['Jun2M', 'SnirBroshi', 'eric-wieser', 'github-actions', 'mathlib-bors'] nobody none
29-79855
29 days ago
30-2285
30 days ago
31-58340
31 days
38393 staroperator
author:staroperator
 refactor(ModelTheory): add typeclasses for algebraic symbols `Language.ring` and `Language.presburger` share the same symbols `0`, `1` and `+` and have duplicated instances on `Term` and `realize` simp lemmas. This PR makes these symbols certain typeclasses (similar to [`Language.IsOrdered`](https://leanprover-community.github.io/mathlib4_docs/Mathlib/ModelTheory/Order.html#FirstOrder.Language.IsOrdered)) and removes the duplication. It also adds certain definability lemmas that `fun_prop` can use. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-logic 332/201 Mathlib.lean,Mathlib/ModelTheory/Algebra/Classes.lean,Mathlib/ModelTheory/Algebra/Field/IsAlgClosed.lean,Mathlib/ModelTheory/Algebra/Ring/Basic.lean,Mathlib/ModelTheory/Algebra/Ring/FreeCommRing.lean,Mathlib/ModelTheory/Arithmetic/Presburger/Basic.lean,Mathlib/ModelTheory/Arithmetic/Presburger/Definability.lean 7 1 ['github-actions'] nobody none
29-67549
29 days ago
29-67607
29 days ago
29-68871
29 days
38498 SnirBroshi
author:SnirBroshi
 feat(Order/RelIso/Basic): lift a function to an order morphism into `Relation.Map` or from `Function.onFun` For an `α`-relation `r` we have: ``` mapRelHom (f : α → β) : r →r Relation.Map r f f mapRelEmbedding (f : α ↪ β) : r ↪r Relation.Map r f f mapRelIso (f : α ≃ β) : r ≃r Relation.Map r f f ``` For a `β`-relation `r` we have: ``` onFunRelHom (f : α → β) : r.onFun f →r r onFunRelEmbedding (f : α ↪ β) : r.onFun f ↪r r onFunRelIso (f : α ≃ β) : r.onFun f ≃r r ``` --- These are pretty similar to `SimpleGraph.{Embedding/Iso}.map` and `SimpleGraph.{Hom/Embedding/Iso}.comap`, as [`comap`](https://github.com/leanprover-community/mathlib4/blob/9268b22206b0425419498769f780a91dee03bcf3/Mathlib/Combinatorics/SimpleGraph/Maps.lean#L117-L118) on graphs is a wrapper around `onFun`, and [`map`](https://github.com/leanprover-community/mathlib4/blob/9268b22206b0425419498769f780a91dee03bcf3/Mathlib/Combinatorics/SimpleGraph/Maps.lean#L57-L58) on graphs is *almost* a wrapper around `Relation.Map`. btw `@[simps]` is angry at me when I try to use it on the structures that use spread syntax. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-order 42/0 Mathlib/Order/RelIso/Basic.lean 1 1 ['github-actions'] nobody none
27-63499
27 days ago
27-63574
27 days ago
27-63286
27 days
38344 robo7179
author:robo7179
 feat(SimpleGraph/Coloring/VertexColoring): Matching is 2 colorable --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-combinatorics new-contributor 51/0 Mathlib/Combinatorics/SimpleGraph/Coloring/VertexColoring.lean 1 5 ['SnirBroshi', 'github-actions', 'vlad902'] nobody none
27-39422
27 days ago
31-6966
31 days ago
31-7064
31 days
38222 IvanRenison
author:IvanRenison
 feat(Combinatorics/SimpleGraph/Girth): add lemmas about isomorphism and girth --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-combinatorics 19/1 Mathlib/Combinatorics/SimpleGraph/Girth.lean 1 6 ['IvanRenison', 'SnirBroshi', 'github-actions', 'vlad902'] nobody none
27-23044
27 days ago
33-84357
33 days ago
33-84069
33 days
38528 SnirBroshi
author:SnirBroshi
 feat(Combinatorics/SimpleGraph/Paths): some cycle lemmas are true for circuits Add `IsCircuit.{not_of_nil,ne_bot,three_le_length}` by using their corresponding `IsCycle` proofs. Also golfs a bit. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-combinatorics 17/9 Mathlib/Combinatorics/SimpleGraph/Paths.lean 1 1 ['github-actions'] nobody none
27-21948
27 days ago
27-22018
27 days ago
27-21730
27 days
38549 SnirBroshi
author:SnirBroshi
 feat(Combinatorics/SimpleGraph/Copy): `Is(Ind)Contained` `completeGraph` lemmas - `G ⊑ completeGraph V` - `G ⊑ completeGraph W ↔ Nonempty (V ↪ W)` - `completeGraph V ⊴ completeGraph W ↔ Nonempty (V ↪ W)` - `G ⊴ completeGraph W → G = ⊤` --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-combinatorics 12/0 Mathlib/Combinatorics/SimpleGraph/Copy.lean 1 1 ['github-actions'] nobody none
26-28523
26 days ago
26-28592
26 days ago
26-28304
26 days
38529 SnirBroshi
author:SnirBroshi
 feat(Combinatorics/SimpleGraph/Girth): `egirth ⊤ = 3` when there are at least 3 vertices Since `Nontrivial` is not enough, we use the condition `3 ≤ ENat.card α`. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-combinatorics 17/0 Mathlib/Combinatorics/SimpleGraph/Girth.lean 1 5 ['SnirBroshi', 'github-actions', 'vlad902'] nobody none
26-28466
26 days ago
27-19183
27 days ago
27-18895
27 days
37835 YaelDillies
author:YaelDillies
 doc(Algebra/Order): update mentions of `OrderedSemiring` and friends As of #20676, it was replaced by `IsOrderedRing`. Not all docs were straightforward to update. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra t-order
label:t-algebra$
 123/280 Counterexamples/HomogeneousPrimeNotPrime.lean,Counterexamples/OrderedCancelAddCommMonoidWithBounds.lean,Mathlib/Algebra/Group/Subgroup/Order.lean,Mathlib/Algebra/Group/ULift.lean,Mathlib/Algebra/Order/AddTorsor.lean,Mathlib/Algebra/Order/Floor/Defs.lean,Mathlib/Algebra/Order/Floor/Ring.lean,Mathlib/Algebra/Order/Floor/Semiring.lean,Mathlib/Algebra/Order/Group/Cone.lean,Mathlib/Algebra/Order/Group/Cyclic.lean,Mathlib/Algebra/Order/GroupWithZero/Unbundled/Defs.lean,Mathlib/Algebra/Order/Hom/Monoid.lean,Mathlib/Algebra/Order/Interval/Set/Monoid.lean,Mathlib/Algebra/Order/Monoid/Canonical/Defs.lean,Mathlib/Algebra/Order/Monoid/Unbundled/Defs.lean,Mathlib/Algebra/Order/Monoid/Unbundled/ExistsOfLE.lean,Mathlib/Algebra/Order/Positive/Ring.lean,Mathlib/Algebra/Order/Ring/Basic.lean,Mathlib/Algebra/Order/Ring/Defs.lean,Mathlib/Algebra/Order/Ring/Unbundled/Basic.lean,Mathlib/Algebra/Order/Star/Basic.lean,Mathlib/Algebra/Order/Sub/WithTop.lean,Mathlib/Algebra/Order/ToIntervalMod.lean,Mathlib/Algebra/Order/WithTop/Untop0.lean,Mathlib/Combinatorics/Pigeonhole.lean,Mathlib/Data/Finsupp/Weight.lean,Mathlib/Data/NNReal/Defs.lean,Mathlib/Data/Nat/Cast/Order/Basic.lean,Mathlib/Data/Nat/Cast/Order/Ring.lean,Mathlib/MeasureTheory/Function/LpOrder.lean,Mathlib/MeasureTheory/Measure/Typeclasses/Finite.lean,Mathlib/Order/Filter/Germ/OrderedMonoid.lean,Mathlib/RingTheory/GradedAlgebra/Radical.lean,Mathlib/RingTheory/HahnSeries/PowerSeries.lean,Mathlib/RingTheory/HahnSeries/Valuation.lean,Mathlib/RingTheory/MvPolynomial/WeightedHomogeneous.lean,Mathlib/Tactic/NormNum/Ineq.lean 37 9 ['NoahW314', 'SnirBroshi', 'github-actions', 'mathlib-merge-conflicts'] nobody none
26-20402
26 days ago
26-20427
26 days ago
41-15273
41 days
38554 YaelDillies
author:YaelDillies
 chore(Combinatorics/SimpleGraph): use the auto-param in `loopless` more --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-combinatorics 5/13 Mathlib/Combinatorics/Digraph/Orientation.lean,Mathlib/Combinatorics/SimpleGraph/AdjMatrix.lean,Mathlib/Combinatorics/SimpleGraph/Basic.lean,Mathlib/Combinatorics/SimpleGraph/Hasse.lean,Mathlib/Combinatorics/SimpleGraph/Maps.lean,Mathlib/Combinatorics/SimpleGraph/Prod.lean,Mathlib/Combinatorics/SimpleGraph/Regularity/Uniform.lean,Mathlib/Order/Cover.lean 8 6 ['SnirBroshi', 'YaelDillies', 'github-actions'] nobody none
25-9022
25 days ago
25-41363
25 days ago
25-43144
25 days
38027 8e7
author:8e7
 feat(Combinatorics/SimpleGraph/Star): define star graphs Add a new definition `starGraph` and several key lemmas. Star graphs are a trivial class of tree, often used in constructive proofs regarding trees. An example use case is shown in #38334. --- All lemmas are hand written first, then golfed with the help of Claude Code. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-combinatorics new-contributor 85/0 Mathlib.lean,Mathlib/Combinatorics/SimpleGraph/Star.lean 2 39 ['8e7', 'IvanRenison', 'JovanGerb', 'SnirBroshi', 'github-actions', 'vihdzp', 'vlad902'] nobody none
24-67415
24 days ago
36-67361
36 days ago
38-65338
38 days
38364 openendings
author:openendings
 feat: create Order/DirectedCompletePartialOrder/Defs.lean Define DirectedCompletePartialOrder and its interaction with iSup and sSup. --- A DirectedCompletePartialOrder is equivalently: - a partial order with LUBs of nonempty directed sets; - what happens when you remove ⊥ from a CompletePartialOrder; or - a ConditionallyCompletePartialOrder in which every directed set is BddAbove. Like CPOs, DCPOs are commonly studied in denotational semantics. Potential applications: - [#Is there code for X? > Summing `ENat`s without topology](https://leanprover.zulipchat.com/#narrow/channel/217875-Is-there-code-for-X.3F/topic/Summing.20.60ENat.60s.20without.20topology/with/590070848) -- defining infinite sums in an DCPO-enriched `AddCommMonoidWithTop` such as `ENat` or `ENNReal`. - [#Is there code for X? > Scott Induction](https://leanprover.zulipchat.com/#narrow/channel/217875-Is-there-code-for-X.3F/topic/Scott.20Induction/with/590112858) -- fixpoint theorems similar to `OmegaCompletePartialOrder`, generalised to arbitrary cardinalities. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-order new-contributor 123/0 Mathlib.lean,Mathlib/Order/DirectedCompletePartialOrder/Defs.lean,docs/references.bib 3 4 ['SnirBroshi', 'github-actions', 'openendings'] nobody none
23-83678
23 days ago
29-73798
29 days ago
30-48336
30 days
37073 kim-em
author:kim-em
 feat: add wrap_instance% using core's wrapInstance This PR adds a new `wrap_instance%` term elaborator that delegates to Lean core's `wrapInstance` (from https://github.com/leanprover/lean4/pull/12897), and replaces ~53 `fast_instance%` call sites where the replacement is safe. `wrap_instance%` is a thin wrapper (~15 lines) around `Lean.Meta.wrapInstance`. Like `fast_instance%`, it reduces instances to constructor applications and reuses canonical sub-instances. Unlike `fast_instance%`, it works at `instances` transparency and delegates all normalization logic to core. The replaced sites cover: - Equiv/type-alias transfers (WithAbs, WithConv, WithVal, WithLp, TransferInstance) - Surjective constructors (Con, RingCon quotients, module congruences) - DFunLike leaf instances (MultilinearMap, ContinuousMultilinearMap, AlternatingMap, Intertwining) - Quotient instances (LinearAlgebra/Quotient/Defs) - inferInstanceAs% sites (StandardPart, Presentation/Core) - Miscellaneous (InfiniteAdeleRing, ZMod) This PR *doesn't* attempt to replace all `fast_instance%`; it gets more complicated! 🤖 Prepared with Claude Code 88/59 Mathlib/Algebra/Algebra/TransferInstance.lean,Mathlib/Algebra/Module/Congruence/Defs.lean,Mathlib/Algebra/WithConv.lean,Mathlib/Analysis/Normed/Lp/WithLp.lean,Mathlib/Analysis/Normed/Ring/WithAbs.lean,Mathlib/Data/ZMod/Basic.lean,Mathlib/GroupTheory/Congruence/Defs.lean,Mathlib/LinearAlgebra/Alternating/Basic.lean,Mathlib/LinearAlgebra/Multilinear/Basic.lean,Mathlib/LinearAlgebra/Quotient/Defs.lean,Mathlib/RepresentationTheory/Intertwining.lean,Mathlib/RingTheory/Extension/Presentation/Core.lean,Mathlib/Tactic/FastInstance.lean,Mathlib/Topology/Algebra/Module/Alternating/Basic.lean,Mathlib/Topology/Algebra/Module/Multilinear/Basic.lean,Mathlib/Topology/Algebra/Valued/WithVal.lean 16 7 ['JovanGerb', 'github-actions', 'kim-em', 'leanprover-radar', 'mathlib-merge-conflicts'] nobody none
23-67939
23 days ago
23-67966
23 days ago
26-54786
26 days
38432 SnirBroshi
author:SnirBroshi
 feat(Logic/Relation): `Map r f g ≤ s ↔ r ≤ s.bicompl f g` and the dual `s ≤ Relation.Map r f g ↔ s.bicompl f g ≤ r` which requires `f` and `g` to be bijective. Adds `Galois{Connection/Insertion/Coinsertion}` for the dual. The theorems are specialized to `onFun` instead of `bicompl` for when `f = g`. The `≤` theorems are spelled using `Subrelation` since `≤` is not yet available in this file, and `∀` for the `bicompl` theorems since `Subrelation` only supports homogeneous relations. A `GaloisConnection` for the iff in the title requires `f`/`g` to be bijective, but then we can get an `OrderIso` which is stronger (see #38499). --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-logic 119/28 Mathlib/Logic/Relation.lean,Mathlib/Order/GaloisConnection/Basic.lean 2 3 ['SnirBroshi', 'github-actions', 'plp127'] nobody none
23-54686
23 days ago
27-61899
27 days ago
28-83033
28 days
38612 SnirBroshi
author:SnirBroshi
 feat(Order/SuccPred/CompleteLinearOrder): `sSup s < x` iff theorems when we know if `x` is a successor pre-limit or not Adds the following theorems (along with their duals and indexed versions): ```lean sSup_lt_iff_of_not_isSuccPrelimit : ¬IsSuccPrelimit x → sSup s < x ↔ ∀ a ∈ s, a < x le_sSup_iff_of_not_isSuccPrelimit : ¬IsSuccPrelimit x → x ≤ sSup s ↔ ∃ a ∈ s, x ≤ a Order.IsSuccPrelimit.sSup_lt_iff : IsSuccPrelimit x → sSup s < x ↔ ∃ a < x, ∀ b ∈ s, b < a Order.IsSuccPrelimit.le_sSup_iff : IsSuccPrelimit x → x ≤ sSup s ↔ ∀ a < x, ∃ b ∈ s, a ≤ b ``` They are similar to these existing theorems, but not the same: ```lean sSup_lt_iff : sSup s < x ↔ ∃ a < x, ∀ b ∈ s, b ≤ a le_sSup_iff_forall_lt : x ≤ sSup s ↔ ∀ a < x, ∃ b ∈ s, a < b ``` --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-order 43/0 Mathlib/Order/SuccPred/CompleteLinearOrder.lean 1 6 ['SnirBroshi', 'github-actions', 'vihdzp'] nobody none
23-54487
23 days ago
24-51401
24 days ago
24-51113
24 days
37930 vlad902
author:vlad902
 chore(SimpleGraph): move `cycleGraph` to its own file PR #34797 re-defined `cycleGraph` independent of `circulantGraph`. Now move the definition of `cycleGraph` to its own file so that the definition can be used without importing the algebra hierarchy. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-combinatorics 173/148 Mathlib.lean,Mathlib/Combinatorics/SimpleGraph/Circulant.lean,Mathlib/Combinatorics/SimpleGraph/Cycle.lean 3 2 ['github-actions', 'mathlib-merge-conflicts'] nobody none
22-58456
22 days ago
22-58479
22 days ago
22-58578
22 days
37832 YaelDillies
author:YaelDillies
 chore(Algebra/Order/GroupWithZero): flatten `Unbundled` folder The algebraic order classes are unbundled now. --- More thought is needed to do the same for `Algebra.Order.Monoid` since filenames conflict. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) file-removed t-algebra t-order
label:t-algebra$
 20/20 Mathlib.lean,Mathlib/Algebra/Order/BigOperators/GroupWithZero/Finset.lean,Mathlib/Algebra/Order/BigOperators/GroupWithZero/List.lean,Mathlib/Algebra/Order/Field/Basic.lean,Mathlib/Algebra/Order/Field/Pointwise.lean,Mathlib/Algebra/Order/GroupWithZero/Basic.lean,Mathlib/Algebra/Order/GroupWithZero/Bounds.lean,Mathlib/Algebra/Order/GroupWithZero/Canonical.lean,Mathlib/Algebra/Order/GroupWithZero/Defs.lean,Mathlib/Algebra/Order/GroupWithZero/Finset.lean,Mathlib/Algebra/Order/GroupWithZero/OrderIso.lean,Mathlib/Algebra/Order/GroupWithZero/Submonoid.lean,Mathlib/Algebra/Order/GroupWithZero/WithZero.lean,Mathlib/Algebra/Order/Nonneg/Basic.lean,Mathlib/Algebra/Order/Ring/Defs.lean,Mathlib/Algebra/Order/Ring/Unbundled/Basic.lean,Mathlib/Order/Filter/IsBounded.lean,Mathlib/RingTheory/DedekindDomain/Ideal/Lemmas.lean,Mathlib/Tactic/FieldSimp/Lemmas.lean 19 3 ['github-actions', 'mathlib-merge-conflicts'] nobody none
22-23341
22 days ago
22-23367
22 days ago
41-28196
41 days
38747 SnirBroshi
author:SnirBroshi
 feat(Combinatorics/SimpleGraph/Basic): more `neighborSet` and `IsIsolated` lemmas --- `neighborSet_mono` moved from `Maps.lean` to `Basic.lean` with a simpler proof [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-combinatorics 72/17 Mathlib/Combinatorics/SimpleGraph/Basic.lean,Mathlib/Combinatorics/SimpleGraph/Finite.lean,Mathlib/Combinatorics/SimpleGraph/Maps.lean,Mathlib/Combinatorics/SimpleGraph/StronglyRegular.lean 4 2 ['github-actions', 'vlad902'] nobody none
21-80135
21 days ago
22-691
22 days ago
22-54692
22 days
37870 Jun2M
author:Jun2M
 feat(Combinatorics/Graph): `Simple` typeclass for `Graph` This PR introduces two type classes on `Graph`: `Loopless` and `Simple`. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-combinatorics 93/0 Mathlib.lean,Mathlib/Combinatorics/Graph/Simple.lean 2 2 ['github-actions', 'mathlib-merge-conflicts'] nobody none
21-72674
21 days ago
21-72698
21 days ago
41-20443
41 days
38142 SnirBroshi
author:SnirBroshi
 feat(Order/SuccPred/CompleteLinearOrder): generalize `csSup_mem_of_not_isSuccLimit` Given `s.Nonempty` and `BddAbove s` we can conclude `sSup s ∈ s` using either: - `csSup_mem_of_not_isSuccPrelimit`, given `ConditionallyCompleteLinearOrder` and `¬IsSuccPrelimit (sSup s)` - `csSup_mem_of_not_isSuccLimit`, given `ConditionallyCompleteLinearOrderBot` and `¬IsSuccLimit (sSup s)` We generalize both to a theorem that requires `ConditionallyCompleteLinearOrder` and `¬IsSuccLimit (sSup s)`. This creates 8 theorems that require `¬IsSuccPrelimit` but are now easily proved with the `¬IsSuccLimit` theorems, we replace `csSup_mem_of_not_isSuccPrelimit`/`exists_eq_ciSup_of_not_isSuccPrelimit` with their primed `ConditionallyCompleteLinearOrderBot` theorems, and deprecates the other 6. Tags a random `to_dual` (in `ConditionallyCompleteLattice/Basic.lean`) to let us `to_dual`ize the new lemmas. --- ~~Should we also deprecate the 8 theorems that require `¬IsSuccPrelimit` and now use `mt`?~~ [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-order 55/42 Mathlib/Order/ConditionallyCompleteLattice/Basic.lean,Mathlib/Order/SuccPred/CompleteLinearOrder.lean,Mathlib/SetTheory/Cardinal/Order.lean 3 9 ['SnirBroshi', 'github-actions', 'mathlib-merge-conflicts', 'vihdzp'] nobody none
20-69371
20 days ago
20-69395
20 days ago
35-67513
35 days
38841 SnirBroshi
author:SnirBroshi
 feat(Mathlib/Order/SuccPred/Limit): more `WithTop` lemmas about `IsMin`/`CovBy`/`IsSuccLimit` --- Continues the work from #38244 We should probably also have such lemmas for `WithTopBot`/`WithBotTop`, but that's for another day [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-order 111/30 Mathlib/Order/Cover.lean,Mathlib/Order/SuccPred/Limit.lean,Mathlib/Order/WithBot.lean 3 1 ['github-actions'] nobody none
20-38933
20 days ago
20-49449
20 days ago
20-49968
20 days
38316 tannerduve
author:tannerduve
 feat(Order/OmegaCompletePartialOrder): least fixed point and Scott induction Adds `ContinuousHom.lfp` for endomorphisms on an ωCPO with `⊥`, as the `ωSup` of the iterate chain from `⊥`, together with `map_lfp`, `isFixedPt_lfp`, `lfp_le_fixed`, `isLeast_lfp`, and the Scott induction theorem `lfp_induction` (specialized from a more general seed-based `ωSup_iterate_induction`). For `Part.fix`, adds: * `Part.exists_mem_approx_of_mem_fix`: if `y ∈ Part.fix g x`, some finite approximation of `g` already contains `y`. * `Part.Fix.approx_eq_iterate_bot` and `Part.Fix.approxChain_eq_iterateChain`: bridges between `Fix.approx`/`approxChain` and `f^[n] ⊥`/`iterateChain`. * `Part.fix_eq_lfp`: `Part.fix g = ContinuousHom.lfp (.ofFun g hc)` when `g` is ω-Scott continuous. * `Part.fix_scott_induction`: Scott induction specialized to `Part.fix`. * `Part.fix_induction_mem`: membership induction on `Part.fix`, derived from `fix_scott_induction`. new-contributor 114/0 Mathlib/Control/LawfulFix.lean,Mathlib/Order/OmegaCompletePartialOrder.lean,docs/references.bib 3 2 ['github-actions'] nobody none
20-13758
20 days ago
31-76260
31 days ago
31-76498
31 days
38358 yuanyi-350
author:yuanyi-350
 doc(1000.yaml): note more formalised theorems --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) documentation maintainer-merge 9/2 docs/1000.yaml 1 12 ['YaelDillies', 'github-actions', 'grunweg', 'vihdzp', 'yuanyi-350'] nobody none
19-43835
19 days ago
19-43897
19 days ago
30-45265
30 days
38890 SnirBroshi
author:SnirBroshi
 feat(Order/ConditionallyCompleteLattice/Basic): more `WithTop` instances Adds the following instances: ``` CompleteLattice α → CompleteLattice (WithTop α) CompleteLinearOrder α → CompleteLinearOrder (WithBot α) ConditionallyCompleteLinearOrder α → ConditionallyCompleteLinearOrder (WithTop α) ConditionallyCompleteLinearOrder α → ConditionallyCompleteLinearOrderBot (WithBot α) ``` and some simp lemmas to help. --- These `#synth`s all succeed after this PR:
(code) ```lean variable {α : Type*} [Preorder α] #synth Preorder αᵒᵈ #synth Preorder <| WithTop α #synth Preorder <| WithBot α #synth Preorder <| WithTopBot α #synth Preorder <| WithBotTop α variable {α : Type*} [PartialOrder α] #synth PartialOrder αᵒᵈ #synth PartialOrder <| WithTop α #synth PartialOrder <| WithBot α #synth PartialOrder <| WithTopBot α #synth PartialOrder <| WithBotTop α variable {α : Type*} [LinearOrder α] #synth LinearOrder αᵒᵈ #synth LinearOrder <| WithTop α #synth LinearOrder <| WithBot α #synth LinearOrder <| WithTopBot α #synth LinearOrder <| WithBotTop α variable {α : Type*} [CompleteLattice α] #synth CompleteLattice αᵒᵈ #synth CompleteLattice <| WithTop α -- new #synth CompleteLattice <| WithBot α #synth CompleteLattice <| WithTopBot α #synth CompleteLattice <| WithBotTop α variable {α : Type*} [CompleteLinearOrder α] #synth CompleteLinearOrder αᵒᵈ #synth CompleteLinearOrder <| WithTop α #synth CompleteLinearOrder <| WithBot α -- new #synth CompleteLinearOrder <| WithTopBot α #synth CompleteLinearOrder <| WithBotTop α variable {α : Type*} [ConditionallyCompleteLattice α] #synth ConditionallyCompleteLattice αᵒᵈ #synth ConditionallyCompleteLattice <| WithTop α #synth ConditionallyCompleteLattice <| WithBot α #synth CompleteLattice <| WithTopBot α #synth CompleteLattice <| WithBotTop α variable {α : Type*} [ConditionallyCompleteLinearOrder α] #synth ConditionallyCompleteLinearOrder αᵒᵈ #synth ConditionallyCompleteLinearOrder <| WithTop α -- new #synth ConditionallyCompleteLinearOrderBot <| WithBot α -- new #synth CompleteLinearOrder <| WithTopBot α #synth CompleteLinearOrder <| WithBotTop α variable {α : Type*} [ConditionallyCompleteLinearOrderBot α] #synth ConditionallyCompleteLinearOrder αᵒᵈ #synth CompleteLinearOrder <| WithTop α #synth ConditionallyCompleteLinearOrderBot <| WithBot α -- new #synth CompleteLinearOrder <| WithTopBot α #synth CompleteLinearOrder <| WithBotTop α ```
[![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) 		t-order 63/9 Mathlib/Order/ConditionallyCompleteLattice/Basic.lean 1 1 ['github-actions'] nobody none
18-78557
18 days ago
18-78633
18 days ago
18-78345
18 days
38871 0xTerencePrime
author:0xTerencePrime
 feat(Combinatorics/SimpleGraph): add parity lemmas for outer and inner vertices Adds three lemmas to `SimpleGraph.DegreeSum`: - `sum_degrees_option_zmod_two`: the handshaking lemma for `Option I` over ZMod 2 - `degree_none_zmod_two_eq_sum`: simp-normal form of the above - `card_degree_one_option_eq_outer_zmod_two`: under degree bound ≤ 2, count of degree-1 inner vertices equals outer vertex degree mod 2 t-combinatorics new-contributor 65/3 Mathlib/Combinatorics/SimpleGraph/DegreeSum.lean 1 6 ['0xTerencePrime', 'SnirBroshi', 'github-actions'] nobody none
18-63243
18 days ago
19-33471
19 days ago
19-33183
19 days
38897 0xTerencePrime
author:0xTerencePrime
 feat(Combinatorics/SetFamily): formalize 1D Sperner's Lemma parity Formalizes the 1-dimensional Sperner's Lemma (parity version): given a coloring of the `n + 1` vertices of a subdivided line segment with two colors (`ZMod 2`), if the two endpoints have different colors, then the number of color-changing edges is odd. This is **distinct** from `IsAntichain.sperner` in `SetFamily.LYM`, which concerns antichains in a power set. This file formalizes the topological/combinatorial parity statement used as the base case in higher-dimensional Sperner arguments. ## Key declarations - `SpernerColoring`: type-safe coloring via `Fin (n + 1) → ZMod 2` - `edgeDiff`: color difference on adjacent vertices, computed in `ZMod 2` - `totalDiff`: telescoping sum of all edge differences - `diffEdges`: the `Finset` of bichromatic (color-changing) edges - `sperner_1d`: main theorem — `Odd (diffEdges c).card` ## Design notes - Using `Fin (n + 1) → ZMod 2` instead of `ℕ → ZMod 2` makes boundary conditions unrepresentable at the type level, eliminating out-of-bounds cases entirely. - The proof reduces to a telescoping sum in `ZMod 2`, using `CharTwo.add_self_eq_zero` to cancel all interior vertices, avoiding parity case splits. This is intended as the 1D base case, the approach generalizes to higher-dimensional Sperner's Lemma in future work. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-combinatorics new-contributor 133/0 Mathlib.lean,Mathlib/Combinatorics/SetFamily/Sperner1D.lean 2 3 ['github-actions', 'grunweg'] nobody none
18-54477
18 days ago
18-64627
18 days ago
18-64339
18 days
36815 EtienneC30
author:EtienneC30
 feat: a measurable space structure on the type of continuous maps Endow the type `C(X, Y)` of continuous maps from `X` to `Y` with the Borel sigma-algebra coming from the compact-open topology and show that, under some assumptions on `X` and `Y`, this is equal to the restriction of the product sigma-algebra over `X → Y`. Provide a measurable equivalence between `{f : X → Y // Continuous f}` and `C(X, Y)`. Co-authored-by: @RemyDegenne --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-topology brownian t-measure-probability 256/0 Mathlib.lean,Mathlib/MeasureTheory/Constructions/BorelSpace/ContinuousMap.lean,Mathlib/Topology/Bases.lean,Mathlib/Topology/Basic.lean,Mathlib/Topology/Compactness/Compact.lean,Mathlib/Topology/Separation/Regular.lean 6 27 ['ADedecker', 'EtienneC30', 'felixpernegger', 'github-actions', 'mathlib-merge-conflicts'] nobody none
17-48590
17 days ago
17-48630
17 days ago
57-43692
57 days
38951 thomaskwaring
author:thomaskwaring
 feat(Order/PrimeSeparator): remove unnecessary hypotheses In `mem_ideal_sup_principal`, boundedness and distributivity were unused, and in `prime_ideal_of_disjoint_filter_ideal`, boundedness was only used to produce an element of the filter `F`, which is already nonempty by definition. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-order new-contributor 9/19 Mathlib/Order/PrimeSeparator.lean 1 2 ['github-actions'] nobody none
17-47168
17 days ago
17-47255
17 days ago
17-46967
17 days
38667 SnirBroshi
author:SnirBroshi
 feat(Order/Hom/Basic): equivalences of `Order{Hom/Embedding/Iso}` - `OrderHom`s are equivalent to `RelHom`s of `LE` (unlike `OrderEmbedding`/`OrderIso` they aren't defined using it) - Congruence equivs for `OrderEmbedding`/`OrderIso` when the two sides are order-isomorphic. This already exists for `OrderHom`. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-order 55/1 Mathlib/Order/Hom/Basic.lean 1 3 ['SnirBroshi', 'dagurtomas', 'github-actions'] nobody none
16-84218
16 days ago
16-84218
16 days ago
23-81451
23 days
38557 SnirBroshi
author:SnirBroshi
 feat(Order/Monotone/Defs): weaken `Preorder` to `LE`/`LT` `Monotone`/`Antitone`/`MonotoneOn`/`AntitoneOn` can use any `LE`, and `StrictMono`/`StrictAnti`/`StrictMonoOn`/`StrictAntiOn` can use any `LT`. This makes it necessary to add some explicit type params (e.g. `(α := α)`) in some places that use monotone-related theorems (e.g. `Function.monotone_eval`). --- Currently `OrderEmbedding` and `OrderIso` can use `LE` but `OrderHom` requires `Preorder` because it's defined using `Monotone`. Generalizing `Monotone` and friends will let us fix this oddity. This follows other basic definitions such as `IsMax`/`CovBy`. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-order 21/15 Mathlib/Analysis/BoxIntegral/Box/Basic.lean,Mathlib/Data/Finsupp/Lex.lean,Mathlib/Data/Finsupp/MonomialOrder/DegLex.lean,Mathlib/Order/Interval/Lex.lean,Mathlib/Order/Monotone/Defs.lean,Mathlib/RingTheory/MvPowerSeries/Trunc.lean,Mathlib/Topology/Order/MonotoneConvergence.lean 7 2 ['JovanGerb', 'github-actions'] nobody none
16-46415
16 days ago
25-76416
25 days ago
25-78959
25 days
38989 grunweg
author:grunweg
 chore: remove `(d)simp only []` Either remove them (when they were unnecessary), or replace by something more low-level. --- I'm happy to make them `simp only` instead, if that is preferred. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) 10/17 Counterexamples/AharoniKorman.lean,Mathlib/Analysis/SpecialFunctions/Integrals/PosLogEqCircleAverage.lean,Mathlib/CategoryTheory/Limits/Fubini.lean,Mathlib/Computability/PartrecCode.lean,Mathlib/Computability/RE.lean,Mathlib/Computability/TuringMachine/Config.lean,Mathlib/Computability/TuringMachine/StackTuringMachine.lean,Mathlib/LinearAlgebra/Matrix/Basis.lean,Mathlib/MeasureTheory/Covering/Besicovitch.lean,Mathlib/MeasureTheory/Measure/Restrict.lean,Mathlib/ModelTheory/Encoding.lean 11 4 ['b-mehta', 'github-actions', 'grunweg'] nobody none
16-33257
16 days ago
16-48525
16 days ago
16-48237
16 days
38979 ldct
author:ldct
 feat(EReal): simplify nat + ⊤ Alternative version of https://github.com/leanprover-community/mathlib4/pull/38975 --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-data 28/2 Mathlib/Data/EReal/Basic.lean,Mathlib/Data/EReal/Operations.lean,MathlibTest/EReal.lean 3 6 ['SnirBroshi', 'eric-wieser', 'github-actions', 'ldct', 'leanprover-radar'] nobody none
16-28100
16 days ago
16-27866
16 days ago
16-27708
16 days
39004 zhuyizheng
author:zhuyizheng
 chore(ModelTheory): fix hypo of `realize_liftAt` changes the hypo of `realize_liftAt` from the incorrect `(hmn : m + n' ≤ n + 1)` to the correct `(hmn : m ≤ n)` --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-logic 2/2 Mathlib/ModelTheory/Semantics.lean 1 3 ['github-actions', 'plp127', 'zhuyizheng'] nobody none
15-74729
15 days ago
16-24458
16 days ago
16-24170
16 days
38310 ZRTMRH
author:ZRTMRH
 feat(Combinatorics/Quiver/Schreier): word evaluation and reachability Adds word evaluation and reachability results to the Schreier graph API. * `SchreierGraph.evalWord` : evaluates a word `List (S × Bool)` as an element of the ambient group, where `(s, true)` contributes `ι s` and `(s, false)` contributes `(ι s)⁻¹`. * `SchreierGraph.evalWord_eq_lift` : agreement with `FreeGroup.lift`. * `SchreierGraph.evalWord_mem_closure` : every word evaluates into the subgroup generated by `ι`. * `SchreierGraph.pathFromWord` : a Bool-tagged word yields a path in `Symmetrify (SchreierGraph V ι)` from `x` to `evalWord ι w • x`. * `SchreierGraph.reachable_iff` : two vertices are connected by a path in the symmetrification iff some element of the subgroup closure carries one to the other. Follow-up to #36320. This PR was written with AI assistance (Claude). The code has been reviewed by the author. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor t-combinatorics large-import LLM-generated 157/0 Mathlib/Combinatorics/Quiver/Schreier.lean 1 2 ['github-actions'] nobody none
15-61183
15 days ago
32-8257
32 days ago
32-7969
32 days
39023 TBUGTB
author:TBUGTB
 feat(Algebra/Order): API lemmas on floor and abs Co-authored-by: Etienne Marion @EtienneC30 --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra brownian new-contributor
label:t-algebra$
 9/0 Mathlib/Algebra/Order/Floor/Semiring.lean,Mathlib/Algebra/Order/Ring/Abs.lean 2 3 ['TBUGTB', 'github-actions'] nobody none
15-42909
15 days ago
15-46098
15 days ago
15-45810
15 days
39029 felixpernegger
author:felixpernegger
 chore: remove redundant `unfold`s This PR removed roughly (estimated by files I went through) half of the `unfold`'s in mathlib which can be removed such that the proof still works (found by searching `unfold ` in VSCode in manually going through ~600/1100 occurences). I originally planned to replace all, but I couldn't find any relevant discussion if this is actually a good practice, so to save potentially wasted time, I make this PR now. (similarly with the `clear` tactic) --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) 63/108 Archive/Imo/Imo1994Q1.lean,Archive/Imo/Imo1998Q2.lean,Archive/Imo/Imo2001Q5.lean,Archive/Wiedijk100Theorems/BuffonsNeedle.lean,Mathlib/Algebra/EuclideanDomain/Basic.lean,Mathlib/Algebra/MvPolynomial/Variables.lean,Mathlib/Algebra/Order/Floor/Ring.lean,Mathlib/AlgebraicGeometry/GammaSpecAdjunction.lean,Mathlib/AlgebraicTopology/SimplexCategory/Basic.lean,Mathlib/AlgebraicTopology/SimplicialSet/Coskeletal.lean,Mathlib/Analysis/Asymptotics/SuperpolynomialDecay.lean,Mathlib/Analysis/Complex/JensenFormula.lean,Mathlib/Analysis/Convex/Strict.lean,Mathlib/Analysis/InnerProductSpace/Calculus.lean,Mathlib/Analysis/InnerProductSpace/GramSchmidtOrtho.lean,Mathlib/Analysis/InnerProductSpace/PiL2.lean,Mathlib/Analysis/SpecialFunctions/ContinuousFunctionalCalculus/Rpow/Basic.lean,Mathlib/Analysis/SpecialFunctions/Trigonometric/Chebyshev/Orthogonality.lean,Mathlib/CategoryTheory/Functor/Flat.lean,Mathlib/CategoryTheory/Functor/FullyFaithful.lean,Mathlib/CategoryTheory/Monoidal/Closed/Functor.lean,Mathlib/Combinatorics/Enumerative/Partition/Basic.lean,Mathlib/Combinatorics/Graph/Delete.lean,Mathlib/Computability/PartrecCode.lean,Mathlib/Computability/RegularExpressions.lean,Mathlib/Computability/TuringMachine/PostTuringMachine.lean,Mathlib/Computability/TuringMachine/StackTuringMachine.lean,Mathlib/Condensed/Light/TopCatAdjunction.lean,Mathlib/Data/Fintype/EquivFin.lean,Mathlib/Data/Fintype/List.lean,Mathlib/Data/Int/GCD.lean,Mathlib/Data/List/Intervals.lean,Mathlib/Data/Matrix/Basis.lean,Mathlib/Data/Nat/BinaryRec.lean,Mathlib/Data/Nat/ChineseRemainder.lean,Mathlib/Data/Nat/Digits/Div.lean,Mathlib/Data/Nat/Dist.lean,Mathlib/Data/Ordmap/Ordset.lean,Mathlib/Data/PNat/Prime.lean,Mathlib/Data/Real/Embedding.lean,Mathlib/Data/Seq/Defs.lean,Mathlib/Data/Stream/Init.lean,Mathlib/Data/WSeq/Basic.lean,Mathlib/Data/ZMod/Basic.lean 44 3 ['felixpernegger', 'github-actions', 'leanprover-radar'] nobody none
15-36028
15 days ago
15-40615
15 days ago
15-40327
15 days
39078 fpvandoorn
author:fpvandoorn
 feat: add lemmas about products over Finset.Iio * Mostly useful for `ℕ` * I added the `Finset.Iic` lemmas by symmetry, but I'm happy to remove them if we think they are redundant. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra
label:t-algebra$
 29/0 Mathlib/Algebra/Order/BigOperators/Group/LocallyFinite.lean 1 1 ['github-actions'] nobody none
14-33554
14 days ago
14-33634
14 days ago
14-33346
14 days
39091 tb65536
author:tb65536
 feat(FieldTheory/Galois/IsGaloisGroup): add version of `IsGaloisGroup.to_isFractionRing` assuming only `IsIntegral` This PR adds a version of `IsGaloisGroup.to_isFractionRing` assuming only `Algebra.IsIntegral A B` (which is weaker than the existing assumption `Finite G`). --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-ring-theory t-algebra
label:t-algebra$
 22/9 Mathlib/FieldTheory/Galois/IsGaloisGroup.lean,Mathlib/RingTheory/Invariant/Basic.lean 2 1 ['github-actions'] nobody none
14-20162
14 days ago
14-20162
14 days ago
14-19875
14 days
39074 tb65536
author:tb65536
 feat(RingTheory/RamificationInertia/Ramification): relate `ramificationIdx'` to `Algebra.IsUnramifiedAt` This PR relates the new `ramificationIdx'` (which will eventually replace `ramificationIdx`) to `Algebra.IsUnramifiedAt`. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-ring-theory t-algebra large-import
label:t-algebra$
 30/0 Mathlib/RingTheory/RamificationInertia/Ramification.lean 1 1 ['github-actions'] nobody none
14-10518
14 days ago
14-26174
14 days ago
14-25887
14 days
38859 SnirBroshi
author:SnirBroshi
 feat(Order/CompleteLattice/Basic): tag `iSup_of_empty'` with `@[simp]` The theorem says `iSup f = sSup ∅` when the domain of `f` is empty, and dually `iInf f = sInf ∅`. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-order 31/47 Mathlib/Analysis/Normed/Lp/lpSpace.lean,Mathlib/Analysis/Seminorm.lean,Mathlib/Data/ENat/Lattice.lean,Mathlib/Data/NNReal/Basic.lean,Mathlib/Data/Nat/Lattice.lean,Mathlib/Data/Real/Archimedean.lean,Mathlib/Data/Set/Finite/Lattice.lean,Mathlib/LinearAlgebra/Eigenspace/Pi.lean,Mathlib/MeasureTheory/Constructions/BorelSpace/Order.lean,Mathlib/Order/CompleteLattice/Basic.lean,Mathlib/Order/ConditionallyCompleteLattice/Indexed.lean,Mathlib/Order/ConditionallyCompletePartialOrder/Indexed.lean,Mathlib/Order/Filter/Basic.lean,Mathlib/Order/Filter/Lift.lean 14 1 ['github-actions'] nobody none
13-55307
13 days ago
19-45199
19 days ago
19-48687
19 days
38328 astrainfinita
author:astrainfinita
 feat: `OrderSupSet` This PR introduces `OrderSupSet` and `OrderInfSet`, which are typeclasses expressing that `sSup` (resp., `sInf`) returns the least upper bound (resp., the greatest lower bound) of a set whenever one exists. This allows us to prove properties about the `sSup` of specific sets (such as `∅`, singletons, finite sets, and `univ`) without any typeclasses asserting the existence of LUBs. For example, `sSup ∅ = ⊥` holds for any type equipped with `OrderBot` `OrderSupSet`, no longer requiring typeclasses like `ConditionallyCompleteLinearOrderBot`. For a general set `s`, this gives a uniform way to extend results about `IsLUB s a → motive a` to `motive (sSup s)`, `motive (⨆ i, f i)`, `motive (a ⊔ b)`, etc., which allows proof reuse for basic API such as [`csSup_insert`](https://leanprover-community.github.io/mathlib4_docs/Mathlib/Order/ConditionallyCompleteLattice/Basic.html#csSup_insert), [`iSup_insert`](https://leanprover-community.github.io/mathlib4_docs/Mathlib/Order/CompleteLattice/Basic.html#iSup_insert), and [`sSup_insert`](https://leanprover-community.github.io/mathlib4_docs/Mathlib/Order/CompleteLattice/Basic.html#sSup_insert) and downstream code like [`csSup_add`](https://leanprover-community.github.io/mathlib4_docs/Mathlib/Algebra/Order/Group/Pointwise/CompleteLattice.html#csSup_add), [`sSup_add`](https://leanprover-community.github.io/mathlib4_docs/Mathlib/Algebra/Order/Group/Pointwise/CompleteLattice.html#sSup_add), and [`sup_add`](https://leanprover-community.github.io/mathlib4_docs/Mathlib/Algebra/Order/Group/Lattice.html#sup_add). Furthermore, this allows us to refactor incrementally, reducing the dependency of results about various completeness typeclasses on the specific implementation of `sSup`. --- [Zulip](https://leanprover.zulipchat.com/#narrow/channel/113488-general/topic/Any.20infimum.20based.20version.20of.20.60OmegaCompletePartialOrder.60.3F) [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-order 156/73 Mathlib/MeasureTheory/OuterMeasure/Induced.lean,Mathlib/Order/Bounds/Basic.lean,Mathlib/Order/Bounds/Defs.lean,Mathlib/Order/CompleteLattice/Basic.lean,Mathlib/Order/CompleteLattice/Defs.lean,Mathlib/Order/SetNotation.lean,Mathlib/Topology/UniformSpace/OfCompactT2.lean 7 16 ['JovanGerb', 'astrainfinita', 'b-mehta', 'github-actions', 'j-loreaux', 'mathlib-merge-conflicts', 'openendings', 'vihdzp'] nobody 1
13-53064
13 days ago
13-53103
13 days ago
18-83523
18 days
39123 SnirBroshi
author:SnirBroshi
 chore(Data/Matrix/Basic): mention `mopMatrix` in `transpose{Ring/Alg}Equiv`s docstring and vice versa - `RingEquiv.mopMatrix` and `transposeRingEquiv` differ by a `ᵐᵒᵖ` since the latter assumes `CommMagma α` instead of `Mul α` - `AlgEquiv.mopMatrix` and `transposeAlgEquiv` differ by a `ᵐᵒᵖ` since the latter assumes `CommSemiring α` instead of `Semiring α` --- Also slightly golfs `RingEquiv.mopMatrix` as a drive-by. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-data 18/11 Mathlib/Data/Matrix/Basic.lean 1 1 ['github-actions'] nobody none
13-11524
13 days ago
13-11606
13 days ago
13-11318
13 days
38855 SnirBroshi
author:SnirBroshi
 feat(Order/ConditionallyCompleteLattice/Indexed): `≤` version of `ciSup_or'` for `ConditionallyCompleteLattice` Deprime `ciSup_or'` because there's no `ciSup_or`, and add a `≤` version (and dual) for `ConditionallyCompleteLattice`. Only `≤` because equality does not hold when `p ≠ q` without `sSup ∅ = ⊥`. --- `ciSup_or'` can't have a dual because there's no dual to `ConditionallyCompleteLinearOrderBot`. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-order 8/1 Mathlib/Order/ConditionallyCompleteLattice/Indexed.lean 1 1 ['github-actions'] nobody none
12-50105
12 days ago
19-71313
19 days ago
19-71025
19 days
38856 SnirBroshi
author:SnirBroshi
 feat(Order/ConditionallyCompleteLattice/Indexed): `iSup_iSup_eq_{left/right}` for `ConditionallyCompleteLinearOrderBot` and `≤` versions for `ConditionallyCompleteLattice`. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-order 32/9 Mathlib/Order/CompleteLattice/Basic.lean,Mathlib/Order/ConditionallyCompleteLattice/Indexed.lean 2 1 ['github-actions'] nobody none
12-49942
12 days ago
19-64232
19 days ago
19-63944
19 days
38489 Jun2M
author:Jun2M
 feat(Topology/Algebra/InfiniteSum): Generalize ENNReal lemmas This PR generalizes many theorems in Topology/Algebra/InfiniteSum/ENNReal.lean from `ENNREal` to any type that satisfies a list of order-related instances, mostly `[CommMonoid α] [CompleteLattice α] [CanonicallyOrderedMul α] [TopologicalSpace α] [SupConvergenceClass α]` Deprecation of the original `ENNReal` lemmas are done in the next PR: #38193. Related Zulip thread: [#Is there code for X? > Summing `ENat`s without topology](https://leanprover.zulipchat.com/#narrow/channel/217875-Is-there-code-for-X.3F/topic/Summing.20.60ENat.60s.20without.20topology/with/588756615) --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) 261/3 Mathlib/MeasureTheory/Measure/MeasureSpace.lean,Mathlib/MeasureTheory/OuterMeasure/OfFunction.lean,Mathlib/Topology/Algebra/InfiniteSum/Basic.lean,Mathlib/Topology/Algebra/InfiniteSum/Order.lean 4 7 ['Jun2M', 'SnirBroshi', 'github-actions', 'wwylele'] nobody none
12-739
12 days ago
12-816
12 days ago
27-76973
27 days
39186 kbuzzard
author:kbuzzard
 perf(RingTheory/LaurentSeries): add some instances Typeclass inference was expensively failing at some point in `LaurentSeries.valuation_compare` without these instances. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) Discovered by getting Claude Code to edit Lean's typeclass inference algorithm and then compile lean and mathlib and see what breaks. Found out that typeclass inference is going down a big hole in this file; this fixes the hole. t-ring-theory 9/0 Mathlib/RingTheory/LaurentSeries.lean 1 3 ['github-actions', 'kbuzzard', 'leanprover-radar'] nobody none
11-44972
11 days ago
11-46508
11 days ago
11-46220
11 days
39190 tb65536
author:tb65536
 chore(RingTheory/LocalRing/ResidueField/Fiber): namespace file This PR adds an `Ideal` namespace to `Fiber.lean` and adds a deprecation for one declaration that should be in this namespace. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-ring-theory t-algebra
label:t-algebra$
 9/3 Mathlib/RingTheory/LocalRing/ResidueField/Fiber.lean 1 1 ['github-actions'] nobody none
11-43653
11 days ago
11-43653
11 days ago
11-43366
11 days
39157 vihdzp
author:vihdzp
 feat: `Nat.cast` commutes with addition --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) 26/9 Mathlib/Data/Nat/Cast/Commute.lean,Mathlib/SetTheory/Ordinal/Arithmetic.lean 2 2 ['github-actions', 'plp127'] nobody none
11-28421
11 days ago
12-3486
12 days ago
12-3198
12 days
37464 martinwintermath
author:martinwintermath
 feat(Geometry/Convex/Cone): Minor additions to pointed cones Minor additions to pointed cones: * `PointedCone.ofSubmodule_le_ofSubmodule` and `PointedCone.ofSubmodule_lt_ofSubmodule`. These are not made simp lemmas, instead the underlying `Submodule.restrictScalars_le` and `Submodule.restrictScalars_lt` have been changed into simp lemmas. * `PointedCone.hull_le_span` as a short form of `Submodule.span_le_restrictScalars R≥0 R s` Co-authored by: Artie Khovanov --- In preparation of #36605. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-convex-geometry maintainer-merge 22/16 Mathlib/Algebra/Module/Submodule/RestrictScalars.lean,Mathlib/Geometry/Convex/Cone/Pointed.lean 2 24 ['YaelDillies', 'artie2000', 'github-actions', 'justus-springer', 'martinwintermath', 'mathlib-merge-conflicts', 'ooovi', 'vihdzp'] nobody 4
11-25617
11 days ago
13-52429
13 days ago
50-65166
50 days
37716 slavanaprienko
author:slavanaprienko
 feat(LinearAlgebra/Matrix/Determinant): Desnanot-Jacobi identity This PR adds the Desnanot-Jacobi identity (also known as the Lewis Carroll identity or Dodgson condensation): for any (n+2)×(n+2) matrix M over a commutative ring, $$\det(M) \cdot \det(M_{1,n}^{1,n}) = \det(M_1^1) \cdot \det(M_n^n) - \det(M_1^n) \cdot \det(M_n^1)$$ The proof follows Bressoud's *Proofs and Confirmations* (Cambridge University Press, 1999): multiply M by an auxiliary matrix built from columns of the adjugate, then compare determinants. This yields the identity premultiplied by det(M). To cancel, we pass to a universal polynomial ring (an integral domain with nonzero determinant), then specialize back to arbitrary commutative rings. It seems there's some interest in adding this: https://leanprover.zulipchat.com/#narrow/channel/217875-Is-there-code-for-X.3F/topic/Determinantal.20identity.20and.20the.20Cauchy.20matrix.20determinant/with/582946873 --- t-algebra new-contributor
label:t-algebra$
 217/0 Mathlib.lean,Mathlib/LinearAlgebra/Matrix/Determinant/DesnanotJacobi.lean 2 13 ['SnirBroshi', 'github-actions', 'grunweg', 'kim-em', 'slavanaprienko'] nobody none
11-7122
11 days ago
11-6876
11 days ago
12-44818
12 days
39219 WenrongZou
author:WenrongZou
 feat(FieldTheory/Finite): add variant theorems for `expand_card` Add `MvPolynomial, MvPowerSeries, PowerSeries` version of `FiniteField.expand_card`, which is only for polynomial. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra large-import
label:t-algebra$
 45/4 Mathlib/FieldTheory/Finite/Basic.lean,Mathlib/LinearAlgebra/Matrix/Charpoly/FiniteField.lean,Mathlib/RingTheory/MvPolynomial/Expand.lean,Mathlib/RingTheory/MvPowerSeries/Expand.lean,Mathlib/RingTheory/PowerSeries/Expand.lean 5 1 ['github-actions'] nobody none
11-3808
11 days ago
11-3849
11 days ago
11-3793
11 days
37951 martinwintermath
author:martinwintermath
 chore(Geometry/Convex/Cone): rework `PointedCone.dual` to take a cone as input in place of a set Rework `PointedCone.dual` to take as input a cone instead of a set. This is done to untangle the functionality of `PointedCone.dual` from `PointedCone.hull` and to align it with the signature of its submodule analogue `Submodule.orthogonalBilin` (partially, with proposed functionality from #34007). See also the discussion here: [#mathlib4 > Reorganizing bilinearity and orthogonality?](https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/Reorganizing.20bilinearity.20and.20orthogonality.3F/with/583882414). Main changes: * change signature `dual (s : Set M)` to `dual (C : PointedCone R M)`. * deprecate `dual_hull` since now obsolete in this form, instead add `mem_dual_hull` in addition to `mem_dual`. * deprecate all of `dual_empty`, `dual_zero` and `dual_singleton_zero` in favor of only `dual_bot`. * deprecate `dual_univ` in favor of `dual_top`. * add notation `R ∙₊ x` in analogy to submodule version `R ∙ x`, for use in new lemma `dual_hull_singleton`. * deprecate `dual_insert` since now obsolete (use `Submodule.span_insert` instead). * deprecate `dual_union`, `dual_iUnion` and `dual_sUnion` in favor of `dual_sup`, `dual_sSup` and `dual_iSup`. * remove `dual_sup` since now obsolete and name has been reused (see above). * add `dual_sup_ker` and `dual_univ_eq_ker` to align with (proposed) submodule analogue for `Submodule.orthogonalBilin`. * deprecate `dual_image` in favor of `dual_map` * add `hull_eq` (cone version of `span_eq`) since used in `basis_coord_mem_dual`. * adjust doc-strings Numerous changes to other files have been necessary. The dual-variants for proper cones or inner product spaces have not yet been adapted to cone-inputs, though this should happen eventually. The definition of `DualFG` has been changed to "duals of `FG`-cones" instead of "duals of finite sets" (also getting rid of `Finset` as previously requested). --- - [x] depends on: #37950 - [x] depends on: #37542 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) 227/128 Mathlib/Analysis/Convex/Cone/Dual.lean,Mathlib/Analysis/Convex/Cone/InnerDual.lean,Mathlib/Analysis/Convex/Cone/TensorProduct.lean,Mathlib/Geometry/Convex/Cone/Dual.lean,Mathlib/Geometry/Convex/Cone/DualFinite.lean,Mathlib/Geometry/Convex/Cone/Pointed.lean,Mathlib/Geometry/Convex/Cone/TensorProduct.lean 7 4 ['github-actions', 'mathlib-dependent-issues', 'mathlib-merge-conflicts'] nobody none
11-289
11 days ago
11-328
11 days ago
24-6168
24 days
39212 emlis42
author:emlis42
 feat(Algebra/ContinuedFractions): add `partNums!` and `partDens!` This PR adds `partNums!` and `partDens!`, which provide infinite stream representations for the sequences of partial numerators and denominators of a generalized continued fraction. t-algebra new-contributor
label:t-algebra$
 8/0 Mathlib/Algebra/ContinuedFractions/Basic.lean 1 4 ['emlis42', 'github-actions', 'grunweg'] nobody none
10-71851
10 days ago
11-18170
11 days ago
11-17882
11 days
39239 alainchmt
author:alainchmt
 feat(FieldTheory/Finite): irreducible polynomial divides X^q^n - X iff degree divides n --- Add the theorem saying that, for an irreducible polynomial `f` over a finite field `K`, the degree of `f` divides `n` if and only if `f` divides `X ^ (Nat.card K) ^ n - X`. Include auxiliary lemmas. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra new-contributor
label:t-algebra$
 34/0 Mathlib/FieldTheory/Finite/Extension.lean,Mathlib/FieldTheory/Minpoly/Field.lean 2 2 ['github-actions'] nobody none
10-44063
10 days ago
10-44152
10 days ago
10-43864
10 days
39195 linesthatinterlace
author:linesthatinterlace
 feat(Logic/Function/Defs): Add dcomp lemmas This PR adds API lemmas about `dcomp` that were previously missing. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-logic 13/0 Mathlib/Logic/Function/Defs.lean 1 6 ['github-actions', 'linesthatinterlace', 'plp127'] nobody none
10-33322
10 days ago
11-34821
11 days ago
11-34533
11 days
39230 bryangingechen
author:bryangingechen
 chore: extract API from #38807 and golf I wanted to understand why these two proofs in #38807 were long (and also play around more with the API in this corner of the library) so I walked through them with Claude Opus. prepared with Claude code t-order LLM-generated 23/37 Mathlib/Order/Bounds/Basic.lean,Mathlib/Order/DirSupClosed.lean 2 2 ['github-actions', 'vihdzp'] nobody 1
9-84085
9 days ago
10-72321
10 days ago
10-72033
10 days
39256 Sfgangloff
author:Sfgangloff
 feat(SymbolicDynamics): add monotonicity lemma for LanguageOn In Symbolic dynamics. Proof that the language of a set of configurations is monotone with respect to inclusion of configuration sets: X ⊆ Y → LanguageOn X U ⊆ LanguageOn Y U The proof is a direct unfolding of definitions: a pattern in the language of X comes from restricting some configuration x ∈ X, and inclusion X ⊆ Y allows the same witness to be used for Y. Related to issue #39252 t-dynamics new-contributor 9/1 Mathlib/Dynamics/SymbolicDynamics/Basic.lean 1 3 ['github-actions'] nobody none
9-52213
9 days ago
10-27017
10 days ago
10-26729
10 days
39282 Sfgangloff
author:Sfgangloff
 feat(SymbolicDynamics): add union morphism lemma for LanguageOn In symbolic dynamics. This PR proves that taking the language over a finite shape commutes with unions of configuration sets: $LanguageOn (X \cup Y) U = LanguageOn X U \cup LanguageOn Y U$ The proof is a direct unfolding of definitions: a pattern in the language of $X \cup Y$ comes from restricting a configuration $x ∈ X \cup Y$, and splitting on whether $x \in X$ or $x \in Y$ yields the corresponding inclusion in either $LanguageOn X U$ or $LanguageOn Y U$. The converse direction rebuilds a witness in $X \cup Y$ from either side of the union. Related to issue #39252 t-dynamics new-contributor 15/1 Mathlib/Dynamics/SymbolicDynamics/Basic.lean 1 2 ['github-actions'] nobody none
9-51987
9 days ago
9-52072
9 days ago
9-51784
9 days
39294 Sfgangloff
author:Sfgangloff
 feat(SymbolicDynamics): prove LanguageOn monotonicity under intersection In symbolic dynamics. This PR proves that taking the language over a finite shape is monotone with respect to intersections of configuration sets: ```math \mathrm{LanguageOn}(X \cap Y)\, U \subseteq \mathrm{LanguageOn}\, X\, U \cap \mathrm{LanguageOn}\, Y\, U ``` The proof is a direct unfolding of definitions: a pattern in the language of `X ∩ Y` comes from restricting a configuration `x ∈ X ∩ Y`. Since such an `x` belongs simultaneously to `X` and `Y`, the same restriction witness gives membership both in `LanguageOn X U` and in `LanguageOn Y U`, yielding membership in their intersection. Related to issue #39252 t-dynamics new-contributor 9/1 Mathlib/Dynamics/SymbolicDynamics/Basic.lean 1 2 ['github-actions'] nobody none
9-43193
9 days ago
9-43276
9 days ago
9-42988
9 days
36388 SnirBroshi
author:SnirBroshi
 feat(Combinatorics/SimpleGraph/AdjMatrix): submatrices and homomorphisms --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-combinatorics maintainer-merge 73/3 Mathlib/Combinatorics/SimpleGraph/AdjMatrix.lean 1 19 ['SnirBroshi', 'YaelDillies', 'eric-wieser', 'github-actions', 'mathlib-merge-conflicts', 'themathqueen'] nobody 1
9-37888
9 days ago
9-74466
9 days ago
39-24733
39 days
39158 SnirBroshi
author:SnirBroshi
 feat(LinearAlgebra/Matrix/Rank): generalize `Matrix.rank`/`LinearMap.rank` to semirings - Generalize `Matrix.rank` from `CommRing` to `CommSemiring` - Generalize `LinearMap.rank` from `AddCommGroup`s over `Ring`s to `AddCommMonoid`s over `Semiring`s (which are the minimum requirements for `Module`) - Many `Matrix.rank` theorems now require `StrongRankCondition` explicitly (which `CommRing` used to provide) - `Matrix.cRank` theorems don't need commutativity --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra
label:t-algebra$
 58/64 Mathlib/LinearAlgebra/Dimension/LinearMap.lean,Mathlib/LinearAlgebra/Matrix/Rank.lean 2 1 ['github-actions'] nobody none
9-31597
9 days ago
11-85480
11 days ago
11-85192
11 days
39095 tb65536
author:tb65536
 feat(FieldTheory/Galois/IsGaloisGroup): `IsGaloisGroup` instance for `FixedPoints.subalgebra` This PR generalizes the existing `IsGaloisGroup` instance for `FixedPoints.intermediateField` to `FixedPoints.subalgebra`. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-ring-theory t-algebra
label:t-algebra$
 23/3 Mathlib/Algebra/Algebra/Subalgebra/Operations.lean,Mathlib/FieldTheory/Galois/IsGaloisGroup.lean,Mathlib/GroupTheory/GroupAction/Defs.lean 3 6 ['eric-wieser', 'github-actions', 'tb65536'] nobody none
9-28803
9 days ago
13-4313
13 days ago
14-16284
14 days
39279 jayscambler
author:jayscambler
 feat(Cryptography/Sigma): Schnorr sigma protocol and signature scheme Adds `Mathlib/Cryptography/Sigma/Schnorr.lean`. New file in a new top-level directory; mathlib currently has no `Mathlib/Cryptography/`, so I've taken `Mathlib/Cryptography/Sigma/` as the natural home for sigma-protocol formalizations. The file proves the three defining properties of Schnorr's identification scheme as a sigma protocol: - `Schnorr.correct`: completeness. Honest verifier accepts honest signer's transcript. - `Schnorr.specialSoundness`: from two accepting transcripts sharing the commitment but using different challenges `c, c'`, the witness `x = (s - s') / (c - c')` is recovered. Needs `q` prime so `c - c'` is invertible in `ZMod q`. - `Schnorr.hvzkAccepts`: the HVZK simulator `g^s · (y^c)⁻¹` always yields accepting transcripts. This is the structural-correctness half of HVZK only; the distributional indistinguishability statement is a separate result and not in this PR. On top of the sigma protocol there's `Schnorr.Signature.{keyGen, sign, verify, correct}` wrapping it as a Fiat-Shamir signature scheme; `Schnorr.Signature.correct` is a one-line corollary of `Schnorr.correct`. Two auxiliary lemmas, `Schnorr.gpow_sub` and `Schnorr.gpow_mul`, bridge `ZMod q` arithmetic and group exponentiation under `Fintype.card G = q`. They're local to this file for now because the surrounding `gpow` API is itself cryptography-specific; if a general `ZMod q`-graded group action framework lands in mathlib later, both lemmas would become instances of it. There's also a small `example` instantiating everything on `Multiplicative (ZMod q)` for `Fact q.Prime` to show the API typechecks. That instantiation is a toy (DLOG is trivial in that group), but it confirms the abstraction is usable. **AI disclosure**: this PR was a collaboration between myself, Grey Haven's autocontext and Claude Opus 4.7 (Anthropic). I read each line and built locally on current master. (strawberry has three r's) new-contributor LLM-generated 352/0 Mathlib.lean,Mathlib/Cryptography/Sigma/Schnorr.lean 2 2 ['github-actions'] nobody none
9-21505
9 days ago
9-21584
9 days ago
9-21786
9 days
35255 vlad902
author:vlad902
 feat(SimpleGraph): `cycleGraph.IsContained` in every graph with a cycle --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-combinatorics 35/0 Mathlib/Combinatorics/SimpleGraph/Circulant.lean 1 3 ['github-actions', 'mathlib-dependent-issues', 'mathlib-merge-conflicts'] nobody none
9-18145
9 days ago
24-4617
24 days ago
24-5276
24 days
39291 MichaelStollBayreuth
author:MichaelStollBayreuth
 perf: change definition of EuclideanDomain class This changes the definition of `EuclideanDomain` from ```lean class EuclideanDomain (R : Type*) extends CommRing R, Nontrivial R where ... ``` to ```lean class EuclideanDomain (R : Type*) [CommRing R] [Nontrivial R] where ... ``` with the goal to see how this affects performance (type class synthesis in particular). --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra slow-typeclass-synthesis
label:t-algebra$
 35/57 Mathlib/Algebra/EuclideanDomain/Basic.lean,Mathlib/Algebra/EuclideanDomain/Defs.lean,Mathlib/Algebra/EuclideanDomain/Field.lean,Mathlib/Algebra/Order/AbsoluteValue/Euclidean.lean,Mathlib/Algebra/Polynomial/FieldDivision.lean,Mathlib/Data/ZMod/Coprime.lean,Mathlib/FieldTheory/RatFunc/AsPolynomial.lean,Mathlib/FieldTheory/RatFunc/Degree.lean,Mathlib/LinearAlgebra/Reflection.lean,Mathlib/MeasureTheory/Covering/BesicovitchVectorSpace.lean,Mathlib/NumberTheory/ClassNumber/AdmissibleAbsoluteValue.lean,Mathlib/NumberTheory/ClassNumber/Finite.lean,Mathlib/NumberTheory/ModularForms/Cusps.lean,Mathlib/NumberTheory/ModularForms/EisensteinSeries/Defs.lean,Mathlib/NumberTheory/Real/GoldenRatio.lean,Mathlib/RingTheory/DiscreteValuationRing/TFAE.lean,Mathlib/RingTheory/EuclideanDomain.lean,Mathlib/RingTheory/FractionalIdeal/Operations.lean,Mathlib/RingTheory/Ideal/NatInt.lean,Mathlib/RingTheory/Int/Basic.lean,Mathlib/RingTheory/Polynomial/Dickson.lean,Mathlib/RingTheory/PrincipalIdealDomain.lean,Mathlib/RingTheory/Radical/Basic.lean,Mathlib/RingTheory/ZMod.lean,MathlibTest/instance_diamonds.lean 25 11 ['MichaelStollBayreuth', 'github-actions', 'kbuzzard', 'leanprover-radar'] nobody none
9-10641
9 days ago
9-13118
9 days ago
9-35393
9 days
34855 staroperator
author:staroperator
 feat(Order): use `to_dual` for `PFilter` This PR redefines `PFilter` to get rid of `OrderDual` and uses `to_dual` to translate theorems. The whole file of `PFilter` is now deprecated. Some changes: - To align with `Filter`, the order on `PFilter` is changed to the reversed set inclusion. Ultrafilters, the dual notion of maximal ideals, become minimal in this order. - `to_dual` does not work on `sequenceOfCofinals`. I left `Order.Cofinal` and the Rasiowa–Sikorski lemma not `to_dual`-ized, and we should move them to a separate file later. - `IsLEChain` is added to tag `to_dual`. - `IsCoatom.isProper`/`IsCoatom.isMaximal` is deprecated by `Order.Ideal.isProper_of_isCoatom`/`Order.Ideal.isMaximal_of_isProper`, since this result is special to ideals while `IsCoatom` namespace should be for orders in general. --- - [x] depends on: #34820 --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-order 292/242 Mathlib/Order/Atoms.lean,Mathlib/Order/BooleanAlgebra/Basic.lean,Mathlib/Order/BooleanAlgebra/Defs.lean,Mathlib/Order/CompleteLattice/Defs.lean,Mathlib/Order/Ideal.lean,Mathlib/Order/PFilter.lean,Mathlib/Order/Preorder/Chain.lean,Mathlib/Order/PrimeIdeal.lean,Mathlib/Order/PrimeSeparator.lean,Mathlib/Order/ZornAtoms.lean,Mathlib/RingTheory/IdealFilter/Basic.lean,Mathlib/RingTheory/IdealFilter/Topology.lean,Mathlib/Tactic/Translate/ToDual.lean 13 4 ['github-actions', 'mathlib-dependent-issues', 'mathlib-merge-conflicts'] nobody none
9-5926
9 days ago
9-5704
9 days ago
21-28728
21 days
37928 AlexeyMilovanov
author:AlexeyMilovanov
 refactor(Computability.Encoding): unbundle Γ and remove FinEncoding This PR unbundles the alphabet `Γ` from the `Encoding` structure and completely removes `FinEncoding`. `Encoding`: The alphabet `Γ` is now an explicit parameter: `structure Encoding (α : Type u) (Γ : Type v)`. `FinEncoding`: Removed. Finiteness is now handled via standard typeclasses (e.g., `[Fintype Γ] (e : Encoding α Γ)`). Combinators: Functions like `finEncodingPair` are simplified to `encodingPair`, dropping the `fin` prefix and `[Fintype]` requirements where no longer needed. Downstream: Mechanically updated `Mathlib.Computability` and `Mathlib.ModelTheory` to pass the explicit `Γ` and use `[Fintype Γ]` where `FinEncoding` was previously required. new-contributor maintainer-merge 87/67 Mathlib/Computability/Encoding.lean,Mathlib/ModelTheory/Encoding.lean 2 9 ['AlexeyMilovanov', 'dagurtomas', 'github-actions', 'vihdzp'] nobody 1
8-79376
8 days ago
15-43954
15 days ago
41-23522
41 days
39341 drocta
author:drocta
 feat(Algebra/Colimit/DirectLimit): add DirectLimit.(NonUnital)StarAlgebra.(lift/of) maps and associated lemmas add the `of` and `lift` maps for `DirectLimit.StarAlgebra` and `DirectLimit.NonUnitalStarAlgebra`, as well as the associated lemmas, `of_f`, `lift_comp_of`, `lift_of`, and `hom_ext` for each. Also make `DirectLimit.NonUnitalAlgebra` only require `[Monoid R]` rather than `[CommSemiring R]`. --- Use of AI: I again asked ChatGPT for some advice about some things about this code. I can personally vouch for all of the code I'm submitting, and that I understand all of it. This is the third part of my project towards supporting direct limits of $C^∗$ -algebras (as I described [on Zulip](https://leanprover.zulipchat.com/#narrow/channel/113489-new-members/topic/Early.20feedback.20on.20approach.20towards.20formalizing.20UHF.20algebras.3F) ). This PR adds an import of `Mathlib.Algebra.Star.StarAlgHom` (because it needs `StarAlgHom` and `NonUnitalStarAlgHom`) replacing/encompassing the previously added imports of `Mathlib.Algebra.Star.StarRingHom` and `Mathlib.Algebra.Algebra.NonUnitalHom` (added in PR #38308 and #38672 respectively). t-algebra new-contributor
label:t-algebra$
 100/3 Mathlib/Algebra/Colimit/DirectLimit.lean 1 2 ['github-actions'] nobody none
8-73928
8 days ago
8-76620
8 days ago
8-76332
8 days
39347 Sfgangloff
author:Sfgangloff
 feat(SymbolicDynamics): refactor of Pattern and shift-invariance of shape languages for subshifts ## Summary This PR refactors Pattern.mulShift in Mathlib/Dynamics/SymbolicDynamics/Basic.lean and uses the cleaner definition to prove shift-invariance of the language of a subshift on a finite shape. ## Changes Pattern.mulShift now returns a Pattern instead of a configuration (more natural). - Old type: Pattern.mulShift : Pattern A G → G → (G → A) - New type: Pattern.mulShift : Pattern A G → G → Pattern A G - The result carries its support (p.support.image (v * ·)) and the default-outside-support proof, so callers don't have to re-derive them. The [IsLeftCancelMul G] hypothesis is moved to the lemmas that actually use it. - The definition Pattern.mulShift itself no longer needs left-cancellation (it only chooses a preimage noncomputably). - The hypothesis is now stated on mulShift_config_apply_mul_left_of_mem and mulOccursInAt_eq_cylinder directly, instead of being a section-level variable. Renames following the type change. - mulShift_apply_mul_left_of_mem → mulShift_config_apply_mul_left_of_mem (because we now write (p.mulShift v).config instead of p.mulShift v). New @[simp] and @[ext] lemmas for Pattern. - Pattern.ext: two patterns are equal iff their supports agree and their configurations agree on the support. - Pattern.mulShift_support: the support of p.mulShift v is p.support.image (v * ·). - Pattern.fromConfig_support: the support of fromConfig x U is U. - Pattern.fromConfig_config_of_mem: on its support, fromConfig x U agrees with x. New lemma Pattern.fromConfig_mulShift. For a left inverse g' * g = 1, shifting the pattern fromConfig x U by g equals fromConfig (mulShift g' x) (U.image (g * ·)). New theorem MulSubshift.languageOn_image_mulShift. For a subshift Y and elements g, g' with g * g' = 1 and g' * g = 1: (fun p => p.mulShift g) '' Y.languageOn U = Y.languageOn (U.image (g * ·)) i.e. the language on the translated shape is exactly the image of the language on U under the pattern-shift map. This gives a bijection between Y.languageOn U and Y.languageOn (U.image (g * ·)), with inverse p ↦ p.mulShift g'. Stated for left-cancellative monoids with an invertible element. Updated docstrings for Pattern.mulShift and the renamed lemma to reflect the bundled-Pattern return type and clarify which results need [IsLeftCancelMul G]. t-dynamics new-contributor 142/48 Mathlib/Dynamics/SymbolicDynamics/Basic.lean 1 3 ['github-actions'] nobody none
8-69328
8 days ago
8-69489
8 days ago
8-69201
8 days
39352 qawbecrdtey
author:qawbecrdtey
 chore(Data/Finset/Slice): remove unnecessary import --- Remove import which was transitively being imported. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-data easy 0/1 Mathlib/Data/Finset/Slice.lean 1 1 ['github-actions'] nobody none
8-55415
8 days ago
8-55409
8 days ago
8-55246
8 days
39288 FordUniver
author:FordUniver
 feat(Combinatorics/SimpleGraph/Subgraph): add `Embedding.ofIsInduced` and `IsInduced.map` Three additions to the `SimpleGraph.Subgraph` API for induced subgraphs. `Embedding.ofIsInduced` is the canonical embedding of an induced subgraph into its ambient graph, paired with `toHom_ofIsInduced` and `ofIsInduced_apply` lemmas. This is the embedding counterpart of `Subgraph.hom`, which only produces a homomorphism because non-induced subgraphs do not reflect adjacency. `Subgraph.IsInduced.map` then records that the image of an induced subgraph under a graph embedding is induced, strengthened to `IsInduced.map_iff` for the iso case. --- **Orthogonal pre-requisite of the `Copy` / `InducedCopy` refactor-feat stack.** Extracted as a prerequisite from #38631 that is otherwise independent of the wider `Copy` / `InducedCopy` refactor-feat stack. t-combinatorics 27/4 Mathlib/Combinatorics/SimpleGraph/Copy.lean,Mathlib/Combinatorics/SimpleGraph/Subgraph.lean 2 15 ['FordUniver', 'SnirBroshi', 'github-actions', 'mathlib-bors'] nobody none
8-43584
8 days ago
9-22294
9 days ago
9-43570
9 days
37413 Paul-Lez
author:Paul-Lez
 feat(Combinatorics/Enumerative/Composition): add lemma about products of embeddings Co-authored-by: Xavier Genereux [xaviergenereux@hotmail.com](mailto:xaviergenereux@hotmail.com) --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-combinatorics 4/0 Mathlib/Combinatorics/Enumerative/Composition.lean 1 3 ['github-actions', 'robin-carlier'] nobody none
8-23389
8 days ago
9-21163
9 days ago
19-49823
19 days
39372 yuanyi-350
author:yuanyi-350
 refactor(NumberTheory): golf `Mathlib/NumberTheory/ModularForms/EisensteinSeries/MDifferentiable` - rewrites `eisensteinSeriesSIF_mdifferentiable` to use `UpperHalfPlane.mdifferentiable_iff` directly and conclude from local uniform convergence of the Eisenstein series Extracted from #38144 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) codex LLM-generated 1/5 Mathlib/NumberTheory/ModularForms/EisensteinSeries/MDifferentiable.lean 1 3 ['github-actions', 'yuanyi-350'] nobody none
8-20603
8 days ago
8-22337
8 days ago
8-22049
8 days
39373 yuanyi-350
author:yuanyi-350
 refactor(NumberTheory): golf `Mathlib/NumberTheory/ModularForms/CongruenceSubgroups` - simplifies `Gamma_mem` to a single `simp` proof via `Gamma_mem'` and `SpecialLinearGroup.ext_iff` - shortens `ModularGroup_T_pow_mem_Gamma` and the `Gamma0` closure proofs with direct `simp`/`simpa` arguments Extracted from #38144 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) codex LLM-generated 4/22 Mathlib/NumberTheory/ModularForms/CongruenceSubgroups.lean 1 2 ['github-actions', 'yuanyi-350'] nobody none
8-20602
8 days ago
8-22335
8 days ago
8-22047
8 days
39374 yuanyi-350
author:yuanyi-350
 refactor(NumberTheory): golf `Mathlib/NumberTheory/ModularForms/Derivative` - rewrites `normalizedDerivOfComplex_sub` to reuse the additive and negation lemmas instead of reproving the subtraction formula pointwise Extracted from #38144 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) codex LLM-generated 4/10 Mathlib/NumberTheory/ModularForms/Derivative.lean 1 2 ['github-actions', 'yuanyi-350'] nobody none
8-20396
8 days ago
8-22332
8 days ago
8-22044
8 days
39375 yuanyi-350
author:yuanyi-350
 refactor(NumberTheory): golf `Mathlib/NumberTheory/ModularForms/SlashActions` - streamlines `prod_slash_sum_weights` by letting `simp` handle the empty case and removing the redundant singleton split in the inductive step Extracted from #38144 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) codex LLM-generated 1/5 Mathlib/NumberTheory/ModularForms/SlashActions.lean 1 2 ['github-actions', 'yuanyi-350'] nobody none
8-20239
8 days ago
8-22329
8 days ago
8-22041
8 days
39376 yuanyi-350
author:yuanyi-350
 refactor(NumberTheory): golf `Mathlib/NumberTheory/RamificationInertia/Basic` - shortens `quotientToQuotientRangePowQuotSucc_surjective` by switching the ideal-factor argument to `irreducible_pow_sup` and `count_normalizedFactors_eq` after isolating the span hypotheses Extracted from #38144 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) codex LLM-generated 4/10 Mathlib/NumberTheory/RamificationInertia/Basic.lean 1 2 ['github-actions', 'yuanyi-350'] nobody none
8-20067
8 days ago
8-22327
8 days ago
8-22039
8 days
39379 yuanyi-350
author:yuanyi-350
 refactor(NumberTheory): golf `Mathlib/NumberTheory/SmoothNumbers` - simplifies the left inverse in `equivProdNatFactoredNumbers` by proving `¬ p ∣ m` once and then using `factorization_pow_self` and `factorization_eq_zero_of_not_dvd` Extracted from #38144 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) codex LLM-generated 4/8 Mathlib/NumberTheory/SmoothNumbers.lean 1 2 ['github-actions', 'yuanyi-350'] nobody none
8-19413
8 days ago
8-22319
8 days ago
8-22031
8 days
39377 yuanyi-350
author:yuanyi-350
 refactor(NumberTheory): golf `Mathlib/NumberTheory/Divisors` - refactors `properDivisors_eq_singleton_one_iff_prime`, `mem_properDivisors_prime_pow`, and `properDivisors_prime_pow` to use more direct divisor lemmas - rewrites `image_div_divisors_eq_divisors` via `map_div_left_divisors` and `image_fst_divisorsAntidiagonal` Extracted from #38144 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) codex LLM-generated 17/42 Mathlib/NumberTheory/Divisors.lean 1 2 ['github-actions', 'yuanyi-350'] nobody none
8-19197
8 days ago
8-22324
8 days ago
8-22036
8 days
39392 jayscambler
author:jayscambler
 feat(Cryptography): one-time pad and Shannon perfect secrecy Adds `Mathlib/Cryptography/OTP.lean`. One-time pad over an arbitrary finite abelian group `G`: - `OTP.encrypt k m := m + k`, `OTP.decrypt k c := c - k`. - `OTP.correct`: `decrypt k (encrypt k m) = m`, by `abel`. - `OTP.perfect_secrecy`: for any `m₀, m₁`, the distributions of `encrypt k m₀` and `encrypt k m₁` over uniform `k` are equal; both reduce to `PMF.uniformOfFintype G`. Proof goes via `Equiv.addLeft`. Independent of the Schnorr PR (#39279); no shared definitions. Unlike everything else likely to live under `Mathlib/Cryptography/`, the security guarantee here is information-theoretic, not computational. **AI disclosure**: this PR was a collaboration between myself, Grey Haven's autocontext and Claude Opus 4.7 (Anthropic). I read each line and built locally on current master. (strawberry has three r's) new-contributor LLM-generated 76/0 Mathlib.lean,Mathlib/Cryptography/OTP.lean 2 3 ['MrBrain295', 'github-actions'] nobody none
7-70457
7 days ago
8-6531
8 days ago
8-6243
8 days
39402 marcelolynch
author:marcelolynch
 feat(ci): add Lake cache shadow workflow for master Introduces a scheduled, non-blocking pipeline that exercises Lake's built-in artifact cache against mathlib master, tracking the eventual migration off `lake exe cache` The workflow runs daily on cron and on workflow_dispatch. Jobs: build_and_stage: 1. Hydrates .lake/build/ via legacy `lake exe cache get` 2. patches the lakefile to enable Lake's artifact cache with three knobs 3. runs an incremental `lake build` to populate Lake's cache from existing artifacts 4. uploads cache artifact for next job. upload: Downloads the staging artifact and pushes it to the cache bucket via `lake cache put-staged`. consume: - `lake cache get` from the cache bucket - `lake build` against the rehydrated cache, `--rehash` verify. CI 406/0 .github/workflows/lake_cache_shadow.yml 1 2 ['github-actions', 'marcelolynch'] nobody none
7-70217
7 days ago
7-74003
7 days ago
7-73715
7 days
37623 IvanRenison
author:IvanRenison
 feat(Order/RelIso): add theorems about `RelHom.comp` and `RelEmbedding.trans` Co-authored-by: SnirBroshi <26556598+SnirBroshi@users.noreply.github.com> --- Missing of this theorems noticed by @SnirBroshi in #37598 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-order maintainer-merge 18/0 Mathlib/Order/RelIso/Basic.lean 1 8 ['IvanRenison', 'SnirBroshi', 'dagurtomas', 'eric-wieser', 'github-actions'] nobody 1
7-45288
7 days ago
47-18758
47 days ago
48-42005
48 days
37745 AntoineChambert-Loir
author:AntoineChambert-Loir
 feat(RingTheory/AugmentationIdeal): base change for augmentation ideals Base change for augmentation ideals Co-authored with: @mariainesdff --- - [x] depends on: #37744 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-ring-theory t-algebra large-import
label:t-algebra$
 441/1 Mathlib.lean,Mathlib/Algebra/Algebra/Hom.lean,Mathlib/Algebra/Algebra/Subalgebra/Basic.lean,Mathlib/Algebra/Module/Submodule/Range.lean,Mathlib/LinearAlgebra/Projection.lean,Mathlib/LinearAlgebra/Span/Defs.lean,Mathlib/LinearAlgebra/TensorProduct/Projection.lean,Mathlib/LinearAlgebra/TensorProduct/RightExactness.lean,Mathlib/LinearAlgebra/TensorProduct/Submodule.lean,Mathlib/Order/Disjoint.lean,Mathlib/RingTheory/Ideal/IsAugmentation.lean,Mathlib/RingTheory/TensorProduct/Basic.lean 12 18 ['AntoineChambert-Loir', 'dagurtomas', 'github-actions', 'mathlib-dependent-issues'] nobody none
7-39796
7 days ago
7-39867
7 days ago
8-13555
8 days
39178 yuanyi-350
author:yuanyi-350
 refactor(MeasureTheory): golf `Mathlib/MeasureTheory/Measure/PreVariation` - refactors `Mathlib/MeasureTheory/Measure/PreVariation` by simplifying `sum_le'` and `sum_le_preVariationFun_of_subset` Extracted from #38104 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) codex LLM-generated t-measure-probability 6/20 Mathlib/MeasureTheory/Measure/PreVariation.lean 1 2 ['github-actions', 'yuanyi-350'] nobody none
7-27915
7 days ago
11-49659
11 days ago
11-49371
11 days
39438 SnirBroshi
author:SnirBroshi
 chore(Order/WellFounded): use `to_dual` Creates `argmax`/`argmaxOn` duals to the existing `argmin`/`argminOn`, and `WellFoundedLT.min`/`WellFoundedGT.max` in order to properly dualize `WellFounded.min_le`. Some theorems about `WellFounded{LT/GT}` which didn't have a dual before have to be renamed to make room, e.g. `StrictMono.range_inj` is renamed to `StrictMono.range_inj_of_wellFoundedLT`. --- This is blocking dualizing things in `ConditionallyCompleteLattice/Basic.lean`. `WellFounded.min_le` has ~30 usages in ~10 files, so deprecating it should probably happen in a separate PR. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-order 80/34 Mathlib/Data/Finset/Sort.lean,Mathlib/Order/Hom/Set.lean,Mathlib/Order/WellFounded.lean,Mathlib/SetTheory/Ordinal/Enum.lean 4 5 ['SnirBroshi', 'github-actions', 'vihdzp'] nobody 1
6-72863
6 days ago
6-72935
6 days ago
6-81243
6 days
39106 SnirBroshi
author:SnirBroshi
 feat(LinearAlgebra/Matrix/Reindex): `AddEquiv` and `RingEquiv` We had `Matrix.reindex` bundled as a `LinearEquiv` and an `AlgEquiv`, and this bundles it as an `AddEquiv` and a `RingEquiv`. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra
label:t-algebra$
 158/43 Mathlib/LinearAlgebra/Matrix/Basis.lean,Mathlib/LinearAlgebra/Matrix/Charpoly/Coeff.lean,Mathlib/LinearAlgebra/Matrix/Reindex.lean,Mathlib/LinearAlgebra/Matrix/Transvection.lean 4 10 ['SnirBroshi', 'eric-wieser', 'github-actions', 'themathqueen'] nobody none
6-72422
6 days ago
9-75109
9 days ago
10-10623
10 days
37076 ertwro
author:ertwro
 feat(Combinatorics/SimpleGraph/Hasse): Hasse diagram is triangle-free Add `SimpleGraph.hasse_cliqueFree_three`: the Hasse diagram of a preorder is triangle-free (`CliqueFree 3`). This is the graph-theoretic formulation of `not_covBy_of_lt_of_lt`: if `a ⋖ b` and `b ⋖ c`, then `¬ a ⋖ c`, so no three elements can be pairwise adjacent in the Hasse diagram. The proof extracts three vertices from a hypothetical 3-clique, case-splits on the covering directions (8 cases), and closes each by `not_covBy_of_lt_of_lt` (6 transitive cases) or `lt_asymm` (2 cyclic cases). --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-combinatorics new-contributor 11/0 Mathlib/Combinatorics/SimpleGraph/Hasse.lean 1 21 ['Rida-Hamadani', 'SnirBroshi', 'ertwro', 'github-actions', 'vlad902'] nobody 1
6-60857
6 days ago
33-64333
33 days ago
41-73825
41 days
37707 MavenRain
author:MavenRain
 feat(Combinatorics/SimpleGraph): add IsMaximalClique/IsMaximalIndepSet, refactor IsMaximum* to MaximalFor Addresses #34962 new-contributor t-combinatorics 63/31 Mathlib/Combinatorics/SimpleGraph/Clique.lean 1 6 ['MavenRain', 'SnirBroshi', 'eric-wieser', 'github-actions'] nobody none
6-54180
6 days ago
6-54252
6 days ago
6-55604
6 days
39388 marcelolynch
author:marcelolynch
 chore: remove @[expose] from def-free public sections Strip `@[expose]` from `public section` headers in 100 modules where no declaration needs its body visible downstream. A new sweep in the style of #38480 Found using the linter-in-progress: #39387 Relevant Zulip thread: https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/Removing.20unnecessary.20.60.40.5Bexpose.5D.60/with/595180230 100/100 Mathlib/Algebra/Category/Ring/Small.lean,Mathlib/Algebra/Field/Basic.lean,Mathlib/Algebra/Field/MinimalAxioms.lean,Mathlib/Algebra/Field/Opposite.lean,Mathlib/Algebra/Field/Rat.lean,Mathlib/Algebra/Field/ULift.lean,Mathlib/Algebra/Field/ZMod.lean,Mathlib/Algebra/Group/Action/Option.lean,Mathlib/Algebra/Group/Action/Sigma.lean,Mathlib/Algebra/Group/Action/Sum.lean,Mathlib/Algebra/Group/Action/Units.lean,Mathlib/Algebra/Group/Subgroup/Actions.lean,Mathlib/Algebra/Group/Submonoid/MulAction.lean,Mathlib/Algebra/Module/Projective.lean,Mathlib/Algebra/Module/Submodule/Basic.lean,Mathlib/Algebra/NonAssoc/LieAdmissible/Defs.lean,Mathlib/Algebra/Notation/Prod.lean,Mathlib/Algebra/Order/Floor/Div.lean,Mathlib/Algebra/Order/Group/Action/End.lean,Mathlib/Algebra/Order/Group/End.lean,Mathlib/Algebra/Order/Group/PosPart.lean,Mathlib/Algebra/Order/Kleene.lean,Mathlib/Algebra/Order/Nonneg/Lattice.lean,Mathlib/Algebra/Order/Pi.lean,Mathlib/Algebra/Order/Ring/Unbundled/Rat.lean,Mathlib/Algebra/Ring/Commute.lean,Mathlib/AlgebraicTopology/ModelCategory/Over.lean,Mathlib/Analysis/InnerProductSpace/Coalgebra.lean,Mathlib/Analysis/Normed/Algebra/TrivSqZeroExt.lean,Mathlib/Analysis/Normed/Group/Constructions.lean,Mathlib/Analysis/Normed/Module/MStructure.lean,Mathlib/Analysis/Normed/Operator/Compact/FiniteDimension.lean,Mathlib/Analysis/ODE/DiscreteGronwall.lean,Mathlib/CategoryTheory/Localization/DerivabilityStructure/OfLocalizedEquivalences.lean,Mathlib/CategoryTheory/MarkovCategory/Positive.lean,Mathlib/CategoryTheory/Monoidal/Cartesian/Normal.lean,Mathlib/CategoryTheory/Monoidal/Functor/Types.lean,Mathlib/CategoryTheory/Monoidal/Types/Coyoneda.lean,Mathlib/CategoryTheory/Sites/CoversTop/Over.lean,Mathlib/Combinatorics/Additive/FreimanHom.lean,Mathlib/Computability/AkraBazzi/AkraBazzi.lean,Mathlib/Data/ENNReal/Action.lean,Mathlib/Data/ENat/Pow.lean,Mathlib/Data/Finsupp/Pointwise.lean,Mathlib/Data/FunLike/Basic.lean,Mathlib/Data/FunLike/Embedding.lean,Mathlib/Data/FunLike/Equiv.lean,Mathlib/Data/Int/Cast/Pi.lean,Mathlib/Data/List/Monad.lean,Mathlib/Data/NNRat/Lemmas.lean,Mathlib/Data/Nat/Lattice.lean,Mathlib/Data/Prod/Lex.lean,Mathlib/Data/Rat/Cast/Defs.lean,Mathlib/Data/Rat/Cast/OfScientific.lean,Mathlib/Data/Real/Archimedean.lean,Mathlib/Data/ZMod/IntUnitsPower.lean,Mathlib/GroupTheory/GroupAction/Embedding.lean,Mathlib/GroupTheory/IsPerfect.lean,Mathlib/GroupTheory/ResiduallyFinite.lean,Mathlib/LinearAlgebra/CliffordAlgebra/Star.lean,Mathlib/LinearAlgebra/Projectivization/Action.lean,Mathlib/LinearAlgebra/RootSystem/GeckConstruction/Semisimple.lean,Mathlib/MeasureTheory/Function/L2Space.lean,Mathlib/MeasureTheory/Integral/IntegralEqImproper.lean,Mathlib/MeasureTheory/Measure/Sub.lean,Mathlib/MeasureTheory/Measure/Typeclasses/ZeroOne.lean,Mathlib/NumberTheory/ModularForms/EisensteinSeries/E2/Transform.lean,Mathlib/NumberTheory/NumberField/ExistsRamified.lean,Mathlib/NumberTheory/Padics/PadicVal/Defs.lean,Mathlib/Order/ConditionallyCompleteLattice/Basic.lean,Mathlib/Order/Filter/FilterProduct.lean,Mathlib/Order/Heyting/Basic.lean,Mathlib/Order/Interval/Set/OrdConnected.lean,Mathlib/Order/Quotient.lean,Mathlib/Probability/Kernel/Deterministic.lean,Mathlib/RingTheory/Coalgebra/Convolution.lean,Mathlib/RingTheory/Flat/IsBaseChange.lean,Mathlib/RingTheory/HopfAlgebra/TensorProduct.lean,Mathlib/RingTheory/Ideal/GoingDown.lean,Mathlib/RingTheory/Ideal/GoingUp.lean,Mathlib/RingTheory/Ideal/Maximal.lean,Mathlib/RingTheory/Localization/Finiteness.lean,Mathlib/RingTheory/Noetherian/Defs.lean,Mathlib/RingTheory/QuasiFinite/Basic.lean,Mathlib/RingTheory/QuasiFinite/Polynomial.lean,Mathlib/RingTheory/QuasiFinite/Weakly.lean,Mathlib/RingTheory/Regular/ProjectiveDimension.lean,Mathlib/RingTheory/SimpleModule/Basic.lean,Mathlib/RingTheory/Smooth/Fiber.lean,Mathlib/RingTheory/TensorProduct/IsBaseChangeRightExact.lean,Mathlib/RingTheory/Unramified/LocalRing.lean,Mathlib/RingTheory/Valuation/Extension.lean,Mathlib/RingTheory/Valuation/IsTrivialOn.lean,Mathlib/SetTheory/Cardinal/Regular.lean,Mathlib/Tactic/Algebra/Lemmas.lean,Mathlib/Topology/Algebra/UniformMulAction.lean,Mathlib/Topology/CWComplex/Classical/Subcomplex.lean,Mathlib/Topology/EMetricSpace/Pi.lean,Mathlib/Topology/List.lean,Mathlib/Topology/MetricSpace/Pseudo/Pi.lean 100 6 ['eric-wieser', 'github-actions', 'grunweg', 'marcelolynch', 'urkud'] nobody none
6-33896
6 days ago
8-11665
8 days ago
8-11377
8 days
39368 gasparattila
author:gasparattila
 feat: homogenization of an affine space --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra
label:t-algebra$
 401/0 Mathlib.lean,Mathlib/LinearAlgebra/AffineSpace/Homogenization.lean,docs/references.bib 3 15 ['eric-wieser', 'gasparattila', 'github-actions'] nobody none
6-31062
6 days ago
8-22568
8 days ago
8-23482
8 days
39110 SnirBroshi
author:SnirBroshi
 chore(Data/Set): reduce defeq abuse of `Set α = α → Prop` These are among the first places that would fail if `Set α` wasn't defeq to `α → Prop`. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-data 35/20 Mathlib/Data/Set/Basic.lean,Mathlib/Data/Set/Defs.lean,Mathlib/Data/Set/Insert.lean,Mathlib/Data/Set/Prod.lean,Mathlib/Order/BooleanAlgebra/Set.lean 5 24 ['SnirBroshi', 'Vierkantor', 'github-actions', 'leanprover-radar', 'mathlib-bors', 'themathqueen', 'urkud', 'vihdzp'] nobody 1
6-29468
6 days ago
6-44419
6 days ago
12-45531
12 days
39457 SnirBroshi
author:SnirBroshi
 feat(LinearAlgebra/Matrix/Defs): lift more algebraic classes --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra
label:t-algebra$
 52/4 Mathlib/Algebra/Group/Pi/Basic.lean,Mathlib/Algebra/Group/Prod.lean,Mathlib/LinearAlgebra/Matrix/Defs.lean 3 4 ['eric-wieser', 'github-actions', 'leanprover-radar', 'urkud'] nobody none
6-24729
6 days ago
6-33839
6 days ago
6-58078
6 days
38551 TTony2019
author:TTony2019
 feat(Analysis/Convex/Intrinsic): add `affineSpan_prod_eq` and `intrinsicInterior_prod_eq` ### Summary We prove that the affine span of a product set equals the product of the affine spans, and that the intrinsic interior of a product set equals the product of the intrinsic interiors. - `affineSpan_prod_eq`: for `s : Set P₁` and `t : Set P₂`, `affineSpan k (s ×ˢ t) = (affineSpan k s) ×ˢ (affineSpan k t)` as sets. - `intrinsicInterior_prod_eq`: for `s : Set P` and `t : Set Q`, `intrinsicInterior 𝕜 (s ×ˢ t) = intrinsicInterior 𝕜 s ×ˢ intrinsicInterior 𝕜 t`. These two theorems are added to `Mathlib/LinearAlgebra/AffineSpace/AffineSubspace/Basic.lean` and `Mathlib/Analysis/Convex/Intrinsic.lean`. ### Collaboration Co-authored-by: @imathwy new-contributor 144/0 Mathlib/Algebra/AddTorsor/Basic.lean,Mathlib/Algebra/Group/Pointwise/Set/Basic.lean,Mathlib/Analysis/Convex/Intrinsic.lean,Mathlib/LinearAlgebra/AffineSpace/AffineSubspace/Basic.lean,Mathlib/LinearAlgebra/Prod.lean 5 22 ['TTony2019', 'github-actions', 'wwylele'] nobody none
6-21380
6 days ago
23-70146
23 days ago
26-13731
26 days
32583 MJ141592
author:MJ141592
 refactor(SimpleGraph): change bridges not to require the edge to be present Remove the requirement for edges to exist in definition of isBridge, and then change the related lemmas to adjust for this, by renaming, fixing the statements and fixing the proofs, including in Acyclic. Closes #31690. --- - [x] depends on: #36802 - [x] depends on: #36804 t-combinatorics new-contributor 95/93 Mathlib/Combinatorics/SimpleGraph/Acyclic.lean,Mathlib/Combinatorics/SimpleGraph/Connectivity/Connected.lean,Mathlib/Combinatorics/SimpleGraph/Connectivity/EdgeConnectivity.lean,Mathlib/Combinatorics/SimpleGraph/DeleteEdges.lean,Mathlib/Combinatorics/SimpleGraph/Hamiltonian.lean 5 47 ['MJ141592', 'Rida-Hamadani', 'SnirBroshi', 'YaelDillies', 'b-mehta', 'github-actions', 'mathlib-dependent-issues', 'mathlib-merge-conflicts', 'mathlib4-merge-conflict-bot'] nobody 2
6-18067
6 days ago
6-19613
6 days ago
48-79568
48 days
39472 NoahW314
author:NoahW314
 feat(RingTheory/MvPolynomial/Homogeneous): add homogeneous lemmas --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-ring-theory large-import 74/2 Mathlib/Data/Finsupp/Weight.lean,Mathlib/RingTheory/MvPolynomial/Homogeneous.lean,Mathlib/RingTheory/MvPolynomial/WeightedHomogeneous.lean 3 1 ['github-actions'] nobody none
6-10111
6 days ago
6-10181
6 days ago
6-10087
6 days
39479 wwylele
author:wwylele
 chore(RingTheory/HahnSeries): remove a defeq abuse Previously the simp implicitly uses `⟨⟨((↑) : ℕ → Γ),...⟩,...⟩.toFun = (↑)`. This explicitly writes out the intermediate term so the it no longer relies on defeq. Also changed the statement of ofPowerSeries_apply to reuse existing embedding --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-ring-theory tech debt 9/12 Mathlib/RingTheory/HahnSeries/PowerSeries.lean,Mathlib/RingTheory/LaurentSeries.lean 2 1 ['github-actions'] nobody none
6-5701
6 days ago
6-5777
6 days ago
6-5597
6 days
39449 Paul-Lez
author:Paul-Lez
 doc: add library note about scoping simp lemmas with weak keys In PR #39262 I noticed that some `simp` lemmas were scoped for a reason that is not immediately obvious, so I figured that adding a library note would be nice in case anyone else runs into this in the future (this pattern is quite common in Mathlib!) In case it's helpful for review, here are links to a few of the PRs that added this scoping initially: - #14233 - #15620 - #15631 --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) 71/4 Mathlib.lean,Mathlib/Algebra/AddConstMap/Basic.lean,Mathlib/Algebra/CharP/Two.lean,Mathlib/Algebra/GradedMonoid.lean,Mathlib/Algebra/Ring/BooleanRing.lean,Mathlib/Algebra/Ring/CharZero.lean,Mathlib/Tactic.lean,Mathlib/Tactic/SimpLibraryNote.lean 8 1 ['github-actions'] nobody none
5-81414
5 days ago
5-81482
5 days ago
5-81766
5 days
38227 vihdzp
author:vihdzp
 chore(Algebra/Order/Monoid/Unbundled/Basic): golfing + formatting We make use of `variable`, fix some weird spacing, and golf many proofs. The only breaking change is that `mul_lt_iff_lt_one_left'`/`add_lt_iff_neg_left` now takes an explicit argument, matching the theorems surrounding it. --- Not too fond of the `calc` tactic. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra t-order
label:t-algebra$
 233/501 Mathlib/Algebra/Order/Monoid/Unbundled/Basic.lean,Mathlib/Data/Real/Archimedean.lean 2 2 ['github-actions', 'mathlib-merge-conflicts'] nobody none
5-75033
5 days ago
5-75093
5 days ago
6-2850
6 days
37720 cjrl
author:cjrl
 feat(Data/Fintype/Card): existsUnique_notMem_image_of_injective_of_card_succ This pull requests adds a small theorem `existsUnique_notMem_image_of_injective_of_card_succ` to `Mathlib/Data/Fintype/Card` that says given an injective map f : α → β such that β has cardinality one more than α, there exists a unique element of β not in the image of f. This can be viewed as going in the opposite direction of `card_lt_of_injective_of_notMem`. This little fact is needed for our Latin Square PR #36698. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-data new-contributor t-set-theory 19/0 Mathlib/Data/Finset/Card.lean,Mathlib/Data/Fintype/Card.lean 2 10 ['IvanRenison', 'cjrl', 'dagurtomas', 'ghseeli', 'github-actions'] nobody none
5-71160
5 days ago
5-71160
5 days ago
43-41728
43 days
39214 Hagb
author:Hagb
 refactor(Data/Finsupp/MonomialOrder): remove `.wf` (well foundedness) field from `MonomialOrder` Many properties still hold without the well-foundedness. Although Gröbner basis theory requires the monomial order to be well founded for the termination of the division algorithm (formalized in `MonomialOrder.div`), many properties that don't relay on the division or remainder still hold without the well-foundedness. Even the division algorithm can terminate in some cases where the monomial order isn't well founded. For example, if the divisors set is finite, then the algorithm can terminate w.r.t. `MonomialOrder.lex (σ := Nat)` even though it isn't well founded. Such cases cannot be directly stated if the formalization of monomial order requires well-foundedness. Deletions: - MonomialOrder.wf --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-ring-theory 21/13 Mathlib/Data/Finsupp/MonomialOrder.lean,Mathlib/Data/Finsupp/MonomialOrder/DegLex.lean,Mathlib/RingTheory/MvPolynomial/Groebner.lean,Mathlib/RingTheory/MvPolynomial/MonomialOrder/DegLex.lean 4 4 ['Hagb', 'github-actions', 'vihdzp'] nobody none
5-66872
5 days ago
11-16501
11 days ago
11-16213
11 days
39443 justus-springer
author:justus-springer
 feat(Data/Set/Image): `nonempty_preimage_iff` Basically a converse to `nonempty_of_nonempty_preimage`. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-data 4/0 Mathlib/Data/Set/Image.lean 1 4 ['Paul-Lez', 'github-actions', 'justus-springer', 'urkud'] nobody none
5-53261
5 days ago
6-84438
6 days ago
6-84150
6 days
38200 Parcly-Taxel
author:Parcly-Taxel
 feat: Turán numbers and their strict monotonicity `strictMonoOn_turanNumber` was initially proved by @Aristotle-Harmonic, then hand-polished. Co-authored-by: Aristotle (Harmonic) t-combinatorics 45/20 Mathlib/Combinatorics/SimpleGraph/Extremal/Turan.lean 1 3 ['Parcly-Taxel', 'github-actions', 'tb65536'] nobody none
5-48766
5 days ago
5-79669
5 days ago
34-47727
34 days
39231 mbkybky
author:mbkybky
 chore(RingTheory/PicardGroup): drop `StrongRankCondition` assumptions in two lemmas --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-ring-theory 3/6 Mathlib/RingTheory/PicardGroup.lean 1 1 ['github-actions'] nobody none
5-38839
5 days ago
10-58205
10 days ago
10-67307
10 days
39067 mbkybky
author:mbkybky
 feat(Algebra/Module): define modules admitting finite free resolutions We say that an `R`-module `M` has a finite free resolution if there exists an exact sequence `0 ⟶ Eₙ ⟶ ⋯ ⟶ E₀ ⟶ M ⟶ 0` such that `Eᵢ` are finite free `R`-modules. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra
label:t-algebra$
 186/0 Mathlib.lean,Mathlib/Algebra/Module/Equiv/Defs.lean,Mathlib/Algebra/Module/FiniteFreeResolution/Basic.lean 3 1 ['github-actions'] nobody none
5-38795
5 days ago
11-22073
11 days ago
14-44778
14 days
39504 WenrongZou
author:WenrongZou
 feat(MvPowerSeries/Ideal): kernel of map equals map `C` of kernel In this PR, we prove that given a ring homomorphism f, suppose that kernel of f is finitely generated, then kernel of map equals map `C` of kernel. (See `ker_map_of_FG`). --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-ring-theory 87/0 Mathlib.lean,Mathlib/RingTheory/MvPowerSeries/Ideal.lean 2 4 ['CoolRmal', 'WenrongZou', 'github-actions'] nobody none
5-29642
5 days ago
5-39959
5 days ago
5-39971
5 days
39307 FordUniver
author:FordUniver
 feat(Combinatorics/SimpleGraph/Copy): introduce `UnlabeledCopy` carrier subtype Adds `abbrev UnlabeledCopy A B := {B' : B.Subgraph // Nonempty (A ≃g B'.coe)}` and uses it to replace the previous inline filter-set body of `copyCount G H`. Drops the now unused legacy Finset-image bridge `copyCount_eq_card_image_copyToSubgraph`. Adds `uniqueUnlabeledCopyBot` instance so `copyCount_bot` is a one-liner via `Fintype.card_unique`. --- **Step 1/5 of the `Copy` / `InducedCopy` refactor-feat stack.** This PR isolates the `UnlabeledCopy` type introduction and the count's type-form redefinition from the larger rename/convention work in the rest of the stack. Note that resolving the current clash in naming (`Copy` and `UnlabeledCopy` vs `labelledCopyCount` and `copyCount`) is part of #38745. t-combinatorics 32/29 Mathlib/Combinatorics/SimpleGraph/Copy.lean 1 6 ['FordUniver', 'github-actions', 'mathlib-bors', 'mitchell-horner'] nobody 1
5-14015
5 days ago
5-23299
5 days ago
9-22985
9 days
39514 SnirBroshi
author:SnirBroshi
 chore(RingTheory/Polynomial/Basic): golf `degreeLTEquiv` Also extracts the `monomial i a ∈ degreeLT R n` proof to a lemma. --- The semicolons might be a bit excessive, let me know if so. Also the `right_inv` proof is slower than the previous version, so maybe it should be reverted, but the rest is fine. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-ring-theory 11/32 Mathlib/RingTheory/Polynomial/Basic.lean 1 1 ['github-actions'] nobody none
5-9440
5 days ago
5-9726
5 days ago
5-9846
5 days
38916 yuanyi-350
author:yuanyi-350
 chore(CategoryTheory/CatCommSq): remove an erw - rewrites `hInv_hInv` by using `conv_rhs` with `iso_hom_naturality` - removes the `rw`/`erw` pair around `Functor.comp_map` Extracted from #38415 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) codex LLM-generated 3/2 Mathlib/CategoryTheory/CatCommSq.lean 1 2 ['github-actions', 'loefflerd'] nobody none
5-8194
5 days ago
18-39718
18 days ago
18-39430
18 days
39202 FordUniver
author:FordUniver
 feat(Analysis/Calculus/Gradient): add toDual_gradient and companions Add `toDual_gradient`, `toDual_gradientWithin`, and the composed variants `toDual_comp_gradient`, `toDual_comp_gradientWithin` — the natural inverse direction of the gradient's defining equation `∇ f x := (toDual 𝕜 F).symm (fderiv 𝕜 f x)`. These identify `(toDual 𝕜 F) (∇ f x)` with `fderiv 𝕜 f x` (and the `gradientWithin` and composed forms with the corresponding fderiv versions), making the Riesz isomorphism between the two derivative views explicit. The proofs of `DifferentiableAt.hasGradientAt` and `DifferentiableWithinAt.hasGradientWithinAt` in the same file are simplified to use them. --- Came up while formalizing the descent lemma for Lipschitz-smooth functions, where being able to switch between `LipschitzWith K (fderiv ℝ f)` and `LipschitzWith K (∇ f)` is helpful, which with this PR becomes `toDual_comp_gradient ▸ (toDual ℝ F).isometry.lipschitzWith_iff K`. Also slightly simplifies two call sites in mathlib. maintainer-merge 20/5 Mathlib/Analysis/Calculus/Gradient/Basic.lean 1 5 ['FordUniver', 'Komyyy', 'github-actions'] nobody 1
4-79572
4 days ago
11-26932
11 days ago
11-26808
11 days
39505 dannyhe652
author:dannyhe652
 feat(SimpleGraph): add Vizing's theorem for edge coloring Hi! I'm a high school student interested in formulization of mathematics in Lean. Recently, I have worked on a project to formulize Vizing Theorem with Daniel Raggi from Cambridge University with AI assistance. In particular, we first drafted an outline for the proof, and built the proof using Claude Opus 4.5 and 4.6. The proof is optimized using Aristotle and finally reviewed by ourselves. We rewrote some parts of the code and some comments. The code now builds cleanly and we wish this code to be reviewed by Lean Community. I am aware that there are previous attempts, some being successful, on formulizing Vizing Theorem, including this one by Arohee https://github.com/aroheebhoja/vizing. However, I believe that no PR have been made. Our proof is not based on his proof, but it could be helpful for the community to review that project as well. I sincerely thank everyone who has time to verify and review our code. A summary of the project is as follows. Please contact me if there are any questions or problems. ## Summary This PR completes the proof of **Vizing's theorem** for edge coloring in simple graphs, proving that the chromatic index of any graph is either Δ (the maximum degree) or Δ + 1. ## Changes ### New files - **`Mathlib/Combinatorics/SimpleGraph/Coloring/EdgeColoring.lean`** — Core definitions - `edgeColoring`: Type for line graph colorings - `edgeColorable`: Graph is edge-colorable with n colors - `chromaticIndex`: Chromatic index as ℕ - **`Mathlib/Combinatorics/SimpleGraph/Coloring/KempeChain.lean`** — Kempe Chain - Coloring observables: `incidentEdges`, `incidentColors`, `missingColors` - Kempe subgraph structure with bounded degree - `swapKempe`: Recolor edges in a connected component via color-swapping - **`Mathlib/Combinatorics/SimpleGraph/Coloring/VizingFan.lean`** — Vizing Fan Rotation - `IsFan`: Vizing fan structure with special color properties - Fan maximality and dichotomy on terminal vertices - `rotate_termA`: Extend coloring when a free color exists at both endpoints - `vizingAdjacencyLemma`: Main adjacency lemma for both cases - **`Mathlib/Combinatorics/SimpleGraph/Coloring/VizingTheorem.lean`** — Main theorems - `edge_eq_of_color_eq`: Proper edge colorings assign different colors to distinct edges sharing a vertex - `maxDegree_le_chromaticIndex`: χ'(G) ≥ Δ(G) - `chromaticIndex_bot`: Empty graph has chromatic index 0 - `vizingUpperBound_aux`: Inductive proof of upper bound on number of edge - `vizingTheorem`: χ'(G) ∈ {Δ(G), Δ(G) + 1} ### Modified files - `Mathlib.lean` — Added imports for the four new coloring modules ## Technical Approach **Lower bound** (χ'(G) ≥ Δ): - Edges incident to a max-degree vertex form a clique in the line graph - Clique number lower-bounds chromatic number **Upper bound** (χ'(G) ≤ Δ + 1): - Induction on the number of edges - Base case: empty graph colored with 0 colors - Inductive step: - If a free color exists at both endpoints of an edge, then extend directly - Otherwise: - Build a maximal fan from one endpoint - Apply dichotomy: either extend via Term-A (free color at both endpoints) or Term-B (Kempe swap) - Term-B uses a three-vertex connectivity argument to derive a contradiction, forcing the fan to extend ## Key Lemmas - `incidentEdges`, `incidentColors`, `missingColors`: Coloring observables at vertices - `kempeSubgraph`: Restricted subgraph of edges with two specific colors - `swapKempe`: Recolor via Kempe chain swapping - `IsFan.singleton`: Trivial fan always valid - `IsFan.length_le_card`: Fan length is bounded by vertex count - `IsFan.dichotomy`: Maximal fan satisfies Term-A or Term-B - `IsFan.rotate_termA`: Term-A case extends the coloring inductively - `vizingAdjacencyLemma`: Handles both cases for extending one edge - `vizingUpperBound_aux`: Framework for full inductive proof - `edge_eq_of_color_eq`: Distinctness of edges with same color ## Testing All four modules compile with no `sorry` nor errors or warnings. ## References * V. G. Vizing, *On an estimate of the chromatic class of a p-graph*, Diskret. Analiz. 3 (1964), 25–30. ## Co-authors Co-authored-by: Daniel Raggi Co-authored-by: Aristotle (Harmonic) Co-authored-by: Claude Opus 4.5 & 4.6 --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-combinatorics new-contributor LLM-generated 1915/0 Mathlib.lean,Mathlib/Combinatorics/SimpleGraph/Coloring/EdgeColoring.lean,Mathlib/Combinatorics/SimpleGraph/Coloring/KempeChain.lean,Mathlib/Combinatorics/SimpleGraph/Coloring/VizingFan.lean,Mathlib/Combinatorics/SimpleGraph/Coloring/VizingTheorem.lean 5 3 ['github-actions'] nobody none
4-75003
4 days ago
4-80049
4 days ago
4-81140
4 days
39369 pd4st8hb95-hub
author:pd4st8hb95-hub
 feat: add basic fuzzy set definitions This PR adds a minimal `FuzzySet` API in `Mathlib/Order/FuzzySet`. A fuzzy set is represented as an abbreviation: `FuzzySet α L := α → L` The file provides basic definitions and lemmas: - `degree` - `support` - `core` - `weakCut` - `strongCut` - membership simp lemmas - extensionality - basic monotonicity lemmas for weak and strong cuts This PR intentionally does not add complement, union/intersection-specific API, normal or convex fuzzy sets, fuzzy relations, or advanced fuzzy set theory. Validation: - `lake build Mathlib.Order.FuzzySet` - `#lint only docBlame docBlameThm` Feedback on whether `Mathlib/Order/FuzzySet.lean` is the right location for this minimal API would be appreciated. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-order new-contributor 169/0 Mathlib.lean,Mathlib/Order/FuzzySet.lean 2 6 ['github-actions', 'grunweg', 'pd4st8hb95-hub', 'wwylele'] nobody none
4-72287
4 days ago
6-29517
6 days ago
6-29589
6 days
39133 Thmoas-Guan
author:Thmoas-Guan
 feat(Algebra/ModuleCat): exactness of restrictScalars for general universe level Currently exactness of `ModuleCat.restrictScalars` is synth via being adjoint functor, however this needs the universe level to be some `max u v` where `u` is the universe level of the ring. Here we provide exactness of restrictScalars for general universe level using it preserves short exact sequence. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra
label:t-algebra$
 46/0 Mathlib.lean,Mathlib/Algebra/Category/ModuleCat/ChangeOfRingsExact.lean 2 1 ['github-actions'] nobody none
4-53834
4 days ago
12-63201
12 days ago
12-62913
12 days
37624 IvanRenison
author:IvanRenison
 feat(Combinatorics/SimpleGraph/Maps): add theorems about composition --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-combinatorics maintainer-merge 32/5 Mathlib/Combinatorics/SimpleGraph/Ends/Defs.lean,Mathlib/Combinatorics/SimpleGraph/Maps.lean 2 11 ['IvanRenison', 'YaelDillies', 'github-actions'] nobody 1
4-42819
4 days ago
6-11008
6 days ago
47-47514
47 days
38950 smmercuri
author:smmercuri
 chore(Algebra): `coe_algHom` -> `coe_toAlgHom` --- There are also instances of `coe_ringHom`, `coe_linearMap` etc which I can fix in follow-up PRs [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) 78/64 Mathlib/Algebra/Algebra/Equiv.lean,Mathlib/Algebra/Algebra/Spectrum/Basic.lean,Mathlib/Algebra/Algebra/Subalgebra/Centralizer.lean,Mathlib/Algebra/Azumaya/Basic.lean,Mathlib/Algebra/MvPolynomial/Equiv.lean,Mathlib/AlgebraicGeometry/AffineSpace.lean,Mathlib/Analysis/CStarAlgebra/GelfandDuality.lean,Mathlib/FieldTheory/Extension.lean,Mathlib/FieldTheory/Galois/Basic.lean,Mathlib/FieldTheory/Isaacs.lean,Mathlib/FieldTheory/KummerExtension.lean,Mathlib/FieldTheory/LinearDisjoint.lean,Mathlib/FieldTheory/Minpoly/Field.lean,Mathlib/FieldTheory/SeparableDegree.lean,Mathlib/FieldTheory/SeparablyGenerated.lean,Mathlib/LinearAlgebra/Charpoly/Basic.lean,Mathlib/LinearAlgebra/TensorProduct/Subalgebra.lean,Mathlib/NumberTheory/Cyclotomic/Gal.lean,Mathlib/RingTheory/Algebraic/MvPolynomial.lean,Mathlib/RingTheory/Bialgebra/Equiv.lean,Mathlib/RingTheory/Bialgebra/Hom.lean,Mathlib/RingTheory/DividedPowerAlgebra/Init.lean,Mathlib/RingTheory/Extension/Presentation/Basic.lean,Mathlib/RingTheory/Extension/Presentation/Core.lean,Mathlib/RingTheory/GradedAlgebra/AlgHom.lean,Mathlib/RingTheory/GradedAlgebra/TensorProduct.lean,Mathlib/RingTheory/Ideal/Quotient/Operations.lean,Mathlib/RingTheory/MvPolynomial/Symmetric/FundamentalTheorem.lean,Mathlib/RingTheory/NoetherNormalization.lean,Mathlib/RingTheory/Polynomial/Cyclotomic/Factorization.lean,Mathlib/RingTheory/Smooth/Basic.lean,Mathlib/RingTheory/Smooth/IntegralClosure.lean,Mathlib/RingTheory/TensorProduct/Maps.lean 33 5 ['github-actions', 'j-loreaux'] nobody none
4-38423
4 days ago
4-38204
4 days ago
15-8982
15 days
39075 Thmoas-Guan
author:Thmoas-Guan
 feat(Algebra/CommRingCat): colimit of local ring via local hom In this PR, we deal with filtered colimit of local ring via local homomorphisms, proving it is again local, with maximal ideal equal to the union of images of maximal ideals. Co-authored-by: Wang Jingting --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra
label:t-algebra$
 209/0 Mathlib.lean,Mathlib/Algebra/Category/Ring/FilteredColimitsLocal.lean 2 1 ['github-actions'] nobody none
4-34553
4 days ago
14-34947
14 days ago
14-34776
14 days
39412 mbkybky
author:mbkybky
 feat(RingTheory/Flat): a finite flat `R`-module `M` is locally free if `rankAtStalk M` is constant Let `M` be a finite flat `R`-module, `p` be a prime ideal of `R`. We show that if `rankAtStalk M` is constant, then there exists `a ∉ p` such that the `M` is free after localization away from `a`. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-ring-theory 137/2 Mathlib.lean,Mathlib/Algebra/Module/FinitePresentation.lean,Mathlib/Algebra/Module/LocalizedModule/Submodule.lean,Mathlib/LinearAlgebra/FiniteDimensional/Basic.lean,Mathlib/RingTheory/Flat/LocallyFree.lean,Mathlib/RingTheory/Localization/BaseChange.lean,Mathlib/RingTheory/Spectrum/Prime/FreeLocus.lean,Mathlib/RingTheory/Support.lean 8 4 ['github-actions', 'robin-carlier'] nobody none
4-20035
4 days ago
4-20035
4 days ago
7-24731
7 days
39269 godofecht
author:godofecht
 feat(Algebra/Spectrum): add the second resolvent identity Adds `spectrum.resolvent_sub_resolvent`: For `a b : A` in an `R`-algebra and `r` in the resolvent set of both, `resolvent a r - resolvent b r = resolvent a r * (a - b) * resolvent b r`. Companion to `spectrum.resolvent_eq`. t-algebra new-contributor
label:t-algebra$
 15/0 Mathlib/Algebra/Algebra/Spectrum/Basic.lean 1 3 ['github-actions', 'wwylele'] nobody none
4-19977
4 days ago
10-8142
10 days ago
10-7854
10 days
39271 tb65536
author:tb65536
 feat(RingTheory/Ideal/MinimalPrime/Localization): criterion for `R ⧸ I` to have dimension zero This PR proves that a quotient `R ⧸ I` has dimension at most zero iff all minimal primes over `I` are maximal. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-ring-theory t-algebra
label:t-algebra$
 20/0 Mathlib/RingTheory/KrullDimension/Basic.lean,Mathlib/RingTheory/KrullDimension/Zero.lean 2 3 ['github-actions', 'robin-carlier', 'tb65536'] nobody none
4-15507
4 days ago
4-15561
4 days ago
9-83544
9 days
39366 akiezun
author:akiezun
 feat(Data/Nat): add prime divisibility for ascFactorial and choose Adds two prime-divisibility lemmas for natural-number factorial/binomial APIs. The first characterizes when a prime divides an ascending factorial: `Nat.Prime.dvd_ascFactorial_iff`. The second applies this to binomial coefficients: `Nat.Prime.dvd_choose_add_sub_one_iff`, using `Nat.ascFactorial_eq_factorial_mul_choose'` and cancellation of the `n!` factor when `n < p`. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-data new-contributor large-import 46/0 Mathlib.lean,Mathlib/Data/Nat/Choose/Consecutive.lean,Mathlib/Data/Nat/Factorial/BigOperators.lean 3 9 ['SnirBroshi', 'akiezun', 'github-actions', 'wwylele'] nobody none
4-12524
4 days ago
4-14565
4 days ago
8-24656
8 days
39543 jvanwinden
author:jvanwinden
 feat(MeasureTheory/Measure/Tight): portmanteau condition for compact sets One part of the portmanteau theorem states that a limsup condition for closed sets implies weak convergence of probability measures. In the situation where the measures are tight however, one only needs to check the limsup condition for compact sets. This PR thus introduces `tendsto_of_forall_isCompact_of_isTightMeasureSet`, which is a version of [tendsto_of_forall_isClosed_limsup_le](https://leanprover-community.github.io/mathlib4_docs/Mathlib/MeasureTheory/Measure/Portmanteau.html#MeasureTheory.tendsto_of_forall_isClosed_limsup_le) but replaces `IsClosed` with `IsCompact`, under the additional hypothesis that the measures are tight. I would have liked to put this lemma in MeasureTheory/Portmeanteau, but this created an import cycle. I am open to suggestions for where it could otherwise be moved. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-measure-probability 27/0 Mathlib/MeasureTheory/Measure/Tight.lean 1 1 ['github-actions'] nobody none
4-9688
4 days ago
4-9763
4 days ago
4-9475
4 days
39549 Hagb
author:Hagb
 feat(Order/RelIso/Basic): `swap`s and `compl`s are `Equiv`s --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-order 13/8 Mathlib/Order/RelIso/Basic.lean 1 3 ['Hagb', 'github-actions', 'leanprover-radar'] nobody none
4-4860
4 days ago
4-7301
4 days ago
4-7013
4 days
39541 b-mehta
author:b-mehta
 feat(Data/Finset/Powerset): add results about powersetCard These are useful for set family combinatorics --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-data 20/0 Mathlib/Data/Finset/Powerset.lean 1 1 ['github-actions'] nobody none
4-221
4 days ago
4-294
4 days ago
4-2353
4 days
39555 b-mehta
author:b-mehta
 feat(Data/Finset/Image): relate images with nontriviality --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-data 20/0 Mathlib/Data/Finset/Image.lean 1 1 ['github-actions'] nobody none
3-84800
3 days ago
3-84878
3 days ago
3-84590
3 days
39098 BoltonBailey
author:BoltonBailey
 chore(Data/Vector): add `grind` to cons lemmas This PR affects `List.Vector.head_cons` and `List.Vector.tail_cons`. It moves the simp attribute assignment of these lemmas to the lemma declarations and also applies the `grind =` attribute. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-data 2/2 Mathlib/Data/Vector/Basic.lean,Mathlib/Data/Vector/Defs.lean 2 4 ['BoltonBailey', 'github-actions', 'leanprover-radar'] nobody none
3-77922
3 days ago
3-77996
3 days ago
13-4938
13 days
29744 espottesmith
author:espottesmith
 feat(Combinatorics): define directed hypergraphs This PR defines directed hypergraphs: ``` @[ext] structure DiHypergraph (α : Type*) where /-- The vertex set -/ vertexSet : Set α /-- The edge set -/ edgeSet : Set ((Set α) × (Set α)) /-- Each edge is a pair (s, d), where s ⊆ vertexSet and d ⊆ vertexSet -/ edge_src_dst_isSubset_vertexSet' : ∀ ⦃e⦄, e ∈ edgeSet → e.1 ⊆ vertexSet ∧ e.2 ⊆ vertexSet ``` Additional definitions: - tail/head stars and negative/positive stars - some special cases (B-Graph, F-Graph, BF-Graph, and what I'm calling a "non-endless" dihypergraph, where neither the source/tail nor the destination/head are empty) - Vertex and (hyper)edge adjacency - isolated vertices - empty and nonempty dihypergraphs The design employed here is based off of #28613, but this PR does not depend on that one. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-combinatorics new-contributor 398/0 Mathlib.lean,Mathlib/Combinatorics/DiHypergraph/Basic.lean 2 4 ['b-mehta', 'espottesmith', 'github-actions', 'mathlib4-merge-conflict-bot'] nobody none
3-75787
3 days ago
49-45172
49 days ago
107-28351
107 days
33928 jsm28
author:jsm28
 feat(Combinatorics/Tiling/TileSet): indexed families of tiles Define the type `TileSet` for indexed families of tiles (in a discrete context), and some associated definitions (including `symmetryGroup`) and API lemmas. `TileSet` can be used for tilings of the whole space; for tilings of part of the space; for patches of tiles (extracted from a tiling by considering tiles meeting some set of points, or considered on their own without extracting from a tiling); for multiple tilings (covering the space more than once). In particular, the fact that people study multiple tilings provides a clear justification for using indexed families rather than sets of tiles, and basic definitions and API lemmas generally work for all these different uses of `TileSet` (sometimes with weak constraints such as tiles being finite, nonempty and only having finitely many tiles meeting any point of the space). Definitions for saying e.g. "this `TileSet` is a tiling of the whole space" are to be included in subsequent files in subsequent PRs. From AperiodicMonotilesLean. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-combinatorics 460/0 Mathlib.lean,Mathlib/Combinatorics/Tiling/TileSet.lean 2 23 ['Parcly-Taxel', 'b-mehta', 'eric-wieser', 'github-actions', 'jsm28', 'vihdzp'] nobody 1
3-75786
3 days ago
129-6494
129 days ago
129-6206
129 days
32983 JovanGerb
author:JovanGerb
 feat: use `LE.le` for subset relation in `Set`, `Finset`, `PSet`, `ZFSet` This PR allows the use of `⊆` notation while the underlying constant is `≤`. Similarly for `⊂`/`<`, `⊇`/`≥` and `⊃`/`>`. Some notes: - The idea is to later extend this feature to other set notation constants, such as union/intersection. - There are some types for which we cannot use `LE.le` as the underlying constant, because the API has already been developed in core using `HasSubset.Subset`. For example List. So, the elaborator for the `⊆` notation needs to make a decision for which underlying constant to elaborate to, depending on the type. Sometimes the type is not known yet, which makes things awkward. Most of these cases are solved by delaying the elaboration until later when the type is known. However, in some cases this doesn't work either, such as `simp_rw [and_comm (_ ⊆ _)]`, where it is impossible to tell the type when elaborating the term. So, some such cases need to be fixed by making it `simp_rw [and_comm (_ ≤ _)]`. - Dot notation on the `HasSubset.Subset` namespace now doesn't work anymore, and the names need to be put in the `LE.le` namespace instead. - Various `simp` and `gcongr` tags needed to be removed/updated as a result of this change. See also https://leanprover.zulipchat.com/#narrow/channel/113488-general/topic/Any.20infimum.20based.20version.20of.20.60OmegaCompletePartialOrder.60.3F/near/579333629 --- - [x] depends on: #36633 - [x] depends on: #36734 - [x] depends on: #36782 - [x] depends on: #37012 - [x] depends on: #37347 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-data t-meta large-import 289/435 Mathlib/Algebra/Algebra/Subalgebra/Lattice.lean,Mathlib/Algebra/Group/Indicator.lean,Mathlib/Algebra/Group/Pointwise/Finset/Basic.lean,Mathlib/Algebra/Group/Pointwise/Set/Basic.lean,Mathlib/Algebra/GroupWithZero/Action/Pointwise/Finset.lean,Mathlib/Algebra/GroupWithZero/Action/Pointwise/Set.lean,Mathlib/Algebra/Module/Torsion/Basic.lean,Mathlib/Algebra/MvPolynomial/Monad.lean,Mathlib/Algebra/Order/Monoid/Unbundled/Pow.lean,Mathlib/AlgebraicTopology/SimplicialSet/Horn.lean,Mathlib/Analysis/LocallyConvex/WeakSpace.lean,Mathlib/Analysis/Normed/Group/FunctionSeries.lean,Mathlib/Analysis/SpecialFunctions/Log/Summable.lean,Mathlib/CategoryTheory/CofilteredSystem.lean,Mathlib/CategoryTheory/Topos/Sheaf.lean,Mathlib/Combinatorics/Enumerative/Partition/GenFun.lean,Mathlib/Combinatorics/Hall/Basic.lean,Mathlib/Combinatorics/Matroid/Basic.lean,Mathlib/Combinatorics/Matroid/Constructions.lean,Mathlib/Combinatorics/Matroid/Dual.lean,Mathlib/Combinatorics/Matroid/Rank/Cardinal.lean,Mathlib/Combinatorics/SetFamily/AhlswedeZhang.lean,Mathlib/Combinatorics/SetFamily/KruskalKatona.lean,Mathlib/Combinatorics/SimpleGraph/Basic.lean,Mathlib/Combinatorics/SimpleGraph/Ends/Defs.lean,Mathlib/Data/Finset/BooleanAlgebra.lean,Mathlib/Data/Finset/Defs.lean,Mathlib/Data/Finset/Filter.lean,Mathlib/Data/Finset/Image.lean,Mathlib/Data/Finset/Lattice/Basic.lean,Mathlib/Data/Finset/Option.lean,Mathlib/Data/Finset/Powerset.lean,Mathlib/Data/Finset/SDiff.lean,Mathlib/Data/Finset/Sups.lean,Mathlib/Data/Fintype/Card.lean,Mathlib/Data/Multiset/ZeroCons.lean,Mathlib/Data/Rat/Star.lean,Mathlib/Data/Set/Basic.lean,Mathlib/Data/Set/Card.lean,Mathlib/Data/Set/Defs.lean,Mathlib/Data/Set/Disjoint.lean,Mathlib/Data/Set/Finite/Basic.lean,Mathlib/Data/Set/FiniteExhaustion.lean,Mathlib/Data/Set/Notation.lean,Mathlib/Data/Set/Semiring.lean,Mathlib/Data/Set/Sups.lean,Mathlib/Data/SetLike/Basic.lean,Mathlib/Dynamics/Ergodic/Ergodic.lean,Mathlib/Dynamics/FixedPoints/Prufer.lean,Mathlib/GroupTheory/CosetCover.lean,Mathlib/GroupTheory/GroupAction/Blocks.lean,Mathlib/Lean/Expr/ExtraRecognizers.lean,Mathlib/LinearAlgebra/AffineSpace/Simplex/Basic.lean,Mathlib/Logic/Equiv/PartialEquiv.lean,Mathlib/MeasureTheory/Covering/LiminfLimsup.lean,Mathlib/MeasureTheory/Function/AEEqOfIntegral.lean,Mathlib/MeasureTheory/Integral/DominatedConvergence.lean,Mathlib/MeasureTheory/Integral/IntegralEqImproper.lean,Mathlib/MeasureTheory/Measure/AEDisjoint.lean,Mathlib/MeasureTheory/Measure/Decomposition/RadonNikodym.lean,Mathlib/MeasureTheory/Measure/MeasureSpace.lean,Mathlib/MeasureTheory/Measure/MeasureSpaceDef.lean,Mathlib/MeasureTheory/Measure/Prokhorov.lean,Mathlib/MeasureTheory/Measure/Regular.lean,Mathlib/MeasureTheory/Measure/Stieltjes.lean,Mathlib/MeasureTheory/Measure/Typeclasses/Finite.lean,Mathlib/MeasureTheory/Measure/Typeclasses/SFinite.lean,Mathlib/MeasureTheory/SetSemiring.lean,Mathlib/NumberTheory/WellApproximable.lean,Mathlib/Order/Birkhoff.lean,Mathlib/Order/BooleanAlgebra/Set.lean,Mathlib/Order/Bounds/Basic.lean,Mathlib/Order/Filter/AtTopBot/Finset.lean,Mathlib/Order/Filter/Basic.lean,Mathlib/Order/Filter/CountableInter.lean,Mathlib/Order/Filter/Ker.lean,Mathlib/Order/Heyting/Basic.lean,Mathlib/Order/Interval/Finset/Defs.lean,Mathlib/Order/LiminfLimsup.lean,Mathlib/Order/PrimeSeparator.lean,Mathlib/Order/RelClasses.lean,Mathlib/Probability/Process/HittingTime.lean,Mathlib/RingTheory/AlgebraicIndependent/TranscendenceBasis.lean,Mathlib/RingTheory/Polynomial/Cyclotomic/Eval.lean,Mathlib/RingTheory/Spectrum/Prime/Module.lean,Mathlib/SetTheory/ZFC/Basic.lean,Mathlib/SetTheory/ZFC/Class.lean,Mathlib/SetTheory/ZFC/Ordinal.lean,Mathlib/SetTheory/ZFC/PSet.lean,Mathlib/Tactic/SetNotationForOrder.lean,Mathlib/Topology/Algebra/InfiniteSum/Constructions.lean,Mathlib/Topology/Algebra/InfiniteSum/SummationFilter.lean,Mathlib/Topology/Algebra/Nonarchimedean/TotallyDisconnected.lean,Mathlib/Topology/Category/TopCat/Limits/Konig.lean,Mathlib/Topology/Compactness/SigmaCompact.lean,Mathlib/Topology/ExtremallyDisconnected.lean,Mathlib/Topology/Instances/CantorSet.lean,Mathlib/Topology/MetricSpace/HausdorffDistance.lean,Mathlib/Topology/MetricSpace/Ultra/Basic.lean,Mathlib/Topology/Order/HullKernel.lean 106 50 ['JovanGerb', 'Vierkantor', 'b-mehta', 'eric-wieser', 'github-actions', 'j-loreaux', 'joneugster', 'leanprover-radar', 'mathlib-dependent-issues', 'mathlib-merge-conflicts', 'mathlib4-merge-conflict-bot', 'plp127', 'thorimur'] nobody none
3-67547
3 days ago
3-67617
3 days ago
10-35998
10 days
38092 SnirBroshi
author:SnirBroshi
 chore(Order/Defs/Unbundled): deprecate `def Symmetric` in favor of `class Std.Symm` --- [Mathlib's `def Symmetric`](https://leanprover-community.github.io/mathlib4_docs/Mathlib/Order/Defs/Unbundled.html#Symmetric) [Core's `class Std.Symm`](https://leanprover-community.github.io/mathlib4_docs/Init/Core.html#Std.Symm) [Zulip](https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/Relation.20properties.20duplication/near/544638270) [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-order maintainer-merge 465/408 Archive/Wiedijk100Theorems/FriendshipGraphs.lean,Archive/Wiedijk100Theorems/Konigsberg.lean,Counterexamples/HeawoodUnitDistance.lean,Mathlib/Algebra/BigOperators/Group/List/Lemmas.lean,Mathlib/Algebra/Divisibility/Units.lean,Mathlib/Algebra/Group/Basic.lean,Mathlib/Analysis/BoxIntegral/Partition/Basic.lean,Mathlib/Analysis/BoxIntegral/Partition/Split.lean,Mathlib/Analysis/InnerProductSpace/Orthogonal.lean,Mathlib/Analysis/Normed/Operator/Compact/FredholmAlternative.lean,Mathlib/CategoryTheory/Abelian/Pseudoelements.lean,Mathlib/CategoryTheory/IsConnected.lean,Mathlib/CategoryTheory/Limits/Final.lean,Mathlib/CategoryTheory/Limits/IsConnected.lean,Mathlib/Combinatorics/Additive/ErdosGinzburgZiv.lean,Mathlib/Combinatorics/Digraph/Orientation.lean,Mathlib/Combinatorics/Graph/Basic.lean,Mathlib/Combinatorics/Graph/Delete.lean,Mathlib/Combinatorics/Graph/Lattice.lean,Mathlib/Combinatorics/Graph/Maps.lean,Mathlib/Combinatorics/SimpleGraph/AdjMatrix.lean,Mathlib/Combinatorics/SimpleGraph/Basic.lean,Mathlib/Combinatorics/SimpleGraph/Bipartite.lean,Mathlib/Combinatorics/SimpleGraph/Circulant.lean,Mathlib/Combinatorics/SimpleGraph/Clique.lean,Mathlib/Combinatorics/SimpleGraph/CompleteMultipartite.lean,Mathlib/Combinatorics/SimpleGraph/Connectivity/Connected.lean,Mathlib/Combinatorics/SimpleGraph/Dart.lean,Mathlib/Combinatorics/SimpleGraph/Density.lean,Mathlib/Combinatorics/SimpleGraph/Hall.lean,Mathlib/Combinatorics/SimpleGraph/Hasse.lean,Mathlib/Combinatorics/SimpleGraph/LineGraph.lean,Mathlib/Combinatorics/SimpleGraph/Maps.lean,Mathlib/Combinatorics/SimpleGraph/Operations.lean,Mathlib/Combinatorics/SimpleGraph/Prod.lean,Mathlib/Combinatorics/SimpleGraph/Regularity/Uniform.lean,Mathlib/Combinatorics/SimpleGraph/Subgraph.lean,Mathlib/Combinatorics/SimpleGraph/Sum.lean,Mathlib/Combinatorics/SimpleGraph/Triangle/Tripartite.lean,Mathlib/Combinatorics/SimpleGraph/Walk/Basic.lean,Mathlib/Combinatorics/SimpleGraph/Walk/Operations.lean,Mathlib/Data/Finset/Pairwise.lean,Mathlib/Data/Finsupp/BigOperators.lean,Mathlib/Data/List/Pairwise.lean,Mathlib/Data/List/Sigma.lean,Mathlib/Data/Multiset/Bind.lean,Mathlib/Data/Multiset/Defs.lean,Mathlib/Data/Multiset/Pairwise.lean,Mathlib/Data/Multiset/Replicate.lean,Mathlib/Data/Nat/GCD/Basic.lean,Mathlib/Data/Rel/Separated.lean,Mathlib/Data/Seq/Computation.lean,Mathlib/Data/Set/Pairwise/Basic.lean,Mathlib/Data/Set/Pairwise/List.lean,Mathlib/Data/Sym/Sym2.lean,Mathlib/Data/WSeq/Relation.lean,Mathlib/GroupTheory/Perm/Cycle/Factors.lean,Mathlib/GroupTheory/Perm/Cycle/Type.lean,Mathlib/GroupTheory/Perm/Support.lean,Mathlib/Logic/Function/Basic.lean,Mathlib/Logic/Relation.lean,Mathlib/MeasureTheory/Measure/AEDisjoint.lean,Mathlib/MeasureTheory/Measure/NullMeasurable.lean,Mathlib/ModelTheory/Graph.lean,Mathlib/ModelTheory/Semantics.lean,Mathlib/NumberTheory/ArithmeticFunction/Defs.lean,Mathlib/Order/Antichain.lean,Mathlib/Order/Defs/Unbundled.lean,Mathlib/Order/Disjoint.lean,Mathlib/Order/Lattice.lean,Mathlib/Order/Preorder/Chain.lean,Mathlib/Order/PropInstances.lean,Mathlib/RingTheory/Coprime/Ideal.lean,Mathlib/RingTheory/Radical/Basic.lean,Mathlib/Topology/CWComplex/Classical/Graph.lean,Mathlib/Topology/CompactOpen.lean,Mathlib/Topology/Connected/Clopen.lean,Mathlib/Topology/MetricSpace/MetricSeparated.lean,Mathlib/Topology/Separation/Basic.lean,Mathlib/Topology/Separation/GDelta.lean 80 8 ['SnirBroshi', 'dagurtomas', 'github-actions', 'leanprover-radar', 'mathlib-merge-conflicts'] nobody none
3-64199
3 days ago
3-64238
3 days ago
35-50079
35 days
39558 b-mehta
author:b-mehta
 feat(Data/Finset/Prod): count the number of ordered pairs in a set These proofs were written a while ago, so they may be golfable --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-data 21/0 Mathlib/Data/Finset/Prod.lean 1 2 ['github-actions', 'plp127'] nobody none
3-54918
3 days ago
3-82273
3 days ago
3-81985
3 days
39109 mbkybky
author:mbkybky
 feat(RingTheory/LocalProperties): `Module.FinitePresentation` is a local property We show that if there exists a set `{ r }` of `R` such that `Mᵣ` is a finitely presented `Rᵣ`-module for each `r`, then `M` is a finitely presented `R`-module. Co-authored-by: Sihan Su @su00000 Co-authored-by: Yi Song @syur2 From the [Local Properties of Modules](https://github.com/mbkybky/module_localProperties) project. - [x] depends on: #39112 --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-ring-theory maintainer-merge 102/10 Mathlib.lean,Mathlib/RingTheory/LocalProperties/FinitePresentation.lean,Mathlib/RingTheory/Localization/Finiteness.lean 3 9 ['github-actions', 'mathlib-dependent-issues', 'mbkybky', 'riccardobrasca', 'robin-carlier'] nobody none
3-42043
3 days ago
11-26310
11 days ago
13-10368
13 days
39552 themathqueen
author:themathqueen
 chore(RingTheory/Bialgebra/Hom): `toCoalgHom` as prefix for `simps` There are currently no generated `simps` lemmas for these, so this is a straightforward change. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-ring-theory maintainer-merge 1/1 Mathlib/RingTheory/Bialgebra/Hom.lean 1 2 ['YaelDillies', 'github-actions'] nobody 1
3-35056
3 days ago
4-3411
4 days ago
4-3487
4 days
39576 plp127
author:plp127
 chore(Topology): generalize `Topology.IsEmbedding.perfectlyNormalSpace` Generalize theorem `Topology.IsEmbedding.perfectlyNormalSpace` to inducing maps. Generalize some other theorem along the way. Rename `isGδ_induced` to `IsGδ.preimage`, to match `IsOpen.preimage` and `IsClosed.preimage`. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-topology 29/27 Mathlib/Topology/Baire/LocallyCompactRegular.lean,Mathlib/Topology/GDelta/Basic.lean,Mathlib/Topology/Separation/GDelta.lean,Mathlib/Topology/Separation/PerfectlyNormal.lean,Mathlib/Topology/Separation/Regular.lean 5 1 ['github-actions'] nobody none
3-30473
3 days ago
3-31064
3 days ago
3-32208
3 days
39518 abeldonate
author:abeldonate
 feat(RingTheory/LocalProperties/Projective): Projective Module theorem Theorem: R Noetherian, M finitely generated R-Mod. Then: M projective iff M_m free for all m maximal t-ring-theory new-contributor large-import 21/0 Mathlib/RingTheory/LocalProperties/Projective.lean 1 8 ['abeldonate', 'github-actions', 'mbkybky'] nobody none
3-27921
3 days ago
3-27921
3 days ago
3-69888
3 days
38906 lua-vr
author:lua-vr
 feat(ConditionallyCompleteLattice/Indexed): add binary versions of lemmas Add binary versions of some of the lemmas. Those are useful when the domain is indexed over the members of a set. From the Carleson project. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-order carleson 21/5 Mathlib/Order/ConditionallyCompleteLattice/Indexed.lean 1 19 ['JovanGerb', 'SnirBroshi', 'github-actions', 'grunweg', 'lua-vr', 'mathlib-merge-conflicts'] nobody 1
3-27444
3 days ago
3-27509
3 days ago
13-1207
13 days
39567 AlexBrodbelt
author:AlexBrodbelt
 feat(Mathlib/Data/Finite/Option): option type is finite iff type is finite Option type is finite if and only if the type is finite. This is an intermediate result to proving that if the `GroupWithZero` is (in)finite then the `Units` are (in)finite. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-data new-contributor 25/0 Mathlib.lean,Mathlib/Data/Finite/Option.lean 2 11 ['AlexBrodbelt', 'github-actions', 'plp127', 'themathqueen'] nobody none
3-27059
3 days ago
3-43110
3 days ago
3-43436
3 days
39562 eric-wieser
author:eric-wieser
 perf(WithVal): avoid Equiv.ring --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) * depends on: #39563 t-topology 40/20 Mathlib/Topology/Algebra/Valued/WithVal.lean 1 5 ['eric-wieser', 'github-actions', 'leanprover-radar'] nobody none
3-21649
3 days ago
3-59191
3 days ago
3-58947
3 days
39585 chrisflav
author:chrisflav
 chore(RingTheory): add `rfl` lemmas for `Ideal.quotientInfRingEquivPiQuotient` From Pi1. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-ring-theory 11/0 Mathlib/RingTheory/Ideal/Quotient/Operations.lean 1 1 ['github-actions'] nobody none
3-18082
3 days ago
3-18165
3 days ago
3-17877
3 days
39494 Hagb
author:Hagb
 chore(Data/Finsupp/MonomialOrder): rename fields of `MonomialOrder` to match naming conventions Moves: - MonomialOrder.acm -> MonomialOrder.addCommMonoid_syn - MonomialOrder.lo -> MonomialOrder.linearOrder_syn - MonomialOrder.iocam -> MonomialOrder.isOrderedCancelAddMonoid_syn - MonomialOrder.wf -> MonomialOrder.wellFoundedLT_syn --- See https://github.com/leanprover-community/mathlib4/pull/32829#discussion_r2716534558. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-ring-theory 15/6 Mathlib/Data/Finsupp/MonomialOrder.lean,Mathlib/RingTheory/MvPolynomial/Groebner.lean 2 1 ['github-actions'] nobody none
3-15154
3 days ago
5-66844
5 days ago
5-67083
5 days
39588 jvanwinden
author:jvanwinden
 feat(MeasureTheory/Measure/ProbabilityMeasure): add toProbabilityMeasure and basic API Introduces `Measure.toProbabilityMeasure`, which converts a `Measure` into a `ProbabilityMeasure` in the presence of the typeclass assumption `[IsProbabilityMeasure]`. Some basic API is added for the interaction between `toProbabilityMeasure` and the coercion from `ProbabilityMeasure` to `Measure`. The main convenience is that the new method allows for dot notation on `Measure`. This PR arose from the following situation: I needed to prove equality of two `Measure` objects, and I wanted to do this by using uniqueness of limits. But the topology of weak convergence is only defined on `ProbabilityMeasure` and not on `Measure`. With the new lemma `toProbabilityMeasure_inj`, an equality of measures can easily be rewritten into an equality of the corresponding probability measures, after which `tendsto_nhds_unique` can be applied. Aside from this, `toProbabilityMeasure` has the potential to simplify theorem statements about `Measure` objects which use the topology of weak convergence either in the assumptions or the conclusion. For example, now one can simply write `Tendsto μ.toProbabilityMeasure f (nhds μ_lim.toProbabilityMeasure)` when appropriate `[IsProbabilityMeasure]` assumptions are present. This PR is intended as a starting point for a discussion. I only added some basic API, but perhaps more lemmas should be added (which ones?). Also, a similar definition could be made for `FiniteMeasure`. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-measure-probability 19/2 Mathlib/MeasureTheory/Measure/ProbabilityMeasure.lean 1 1 ['github-actions'] nobody none
3-10278
3 days ago
3-10367
3 days ago
3-10079
3 days
39591 plp127
author:plp127
 feat: `Equiv.symm_trans` Add theorem `Equiv.symm_trans`, which says `(f.trans g).symm = g.symm.trans f.symm`. See [Zulip](https://leanprover.zulipchat.com/#narrow/channel/217875-Is-there-code-for-X.3F/topic/.60Equiv.2Esymm_trans.60/near/596266434). --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) easy t-logic 2/0 Mathlib/Logic/Equiv/Defs.lean 1 1 ['github-actions'] nobody none
3-7406
3 days ago
3-7501
3 days ago
3-7213
3 days

Needs triage: assigned PRs on the review queue

Number Author Title Description Labels +/- Modified files (first 100) 📝 💬 All users who commented or reviewed Assignee(s) Approval(s) Updated Last status change total time in review
35610 IvanRenison
author:IvanRenison
 feat(Data/Fin): add several lemmas about subtraction of `Fin.{castLT, castAdd, castSucc, castPred}` --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-data 79/0 Mathlib/Data/Fin/Basic.lean,Mathlib/Data/Fin/SuccPred.lean 2 13 ['IvanRenison', 'chrisflav', 'github-actions', 'robin-carlier', 'wwylele'] eric-wieser
assignee:eric-wieser
 none
83-75792
2 months ago
20-85818
20 days ago
86-30145
86 days
28685 mitchell-horner
author:mitchell-horner
 feat(Combinatorics/SimpleGraph): prove the minimal-degree version of the Erdős-Stone theorem Proves the minimal degree-version of the Erdős-Stone theorem: If `G` has a minimal degree of at least `(1 - 1 / r + o(1)) * card V`, then `G` contains a copy of a `completeEquipartiteGraph` in `r + 1` parts each of size `t`. The double-counting construction from the proof is available in `namespace ErdosStone`. --- - [x] depends on: #25843 - [x] depends on: #27597 - [x] depends on: #27599 - [x] depends on: #28443 - [x] depends on: #28445 - [x] depends on: #28446 - [x] depends on: #28447 This is the first of several pull requests towards the full Erdős-Stone(-Simonovits) theorem, hence the name of the file. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-combinatorics maintainer-merge 323/0 Mathlib.lean,Mathlib/Combinatorics/SimpleGraph/Extremal/ErdosStoneSimonovits.lean 2 19 ['YaelDillies', 'b-mehta', 'github-actions', 'mathlib-dependent-issues', 'mathlib4-merge-conflict-bot', 'mitchell-horner', 'robin-carlier'] b-mehta
assignee:b-mehta
 1
81-55263
2 months ago
18-75925
18 days ago
78-84379
78 days
35069 A-M-Berns
author:A-M-Berns
 feat(Geometry/Polygon): simple polygons and boundary map This PR introduces Simple polygons with the predicate `IsSimple`, which captures the idea of a non-self-intersecting boundary, in the file Simple.lean. In the file Boundary.lean, a boundary map from `AddCircle n` is defined. I prove that the range of this map is the boundary and that this map is injective if and only if the polygon is simple. I kept Boundary.lean and Simple.lean separate because future results will include stuff just about the boundary map independent of simplicity (e.g. that it is continuous in the appropriate setting) and stuff just about simple polygons independent of the boundary map (e.g. that for n = 3, IsSimple iff HasNondegenerateVertices.) I used Claude Code to help generate some of the proof material, but I golfed and edited all AI contribution. - [x] depends on: #34598 --- new-contributor t-euclidean-geometry LLM-generated 360/0 Mathlib.lean,Mathlib/Geometry/Polygon/Boundary.lean,Mathlib/Geometry/Polygon/Simple.lean,Mathlib/Logic/Equiv/Fin/Rotate.lean 4 30 ['A-M-Berns', 'eric-wieser', 'github-actions', 'joneugster', 'jsm28', 'mathlib-dependent-issues', 'mathlib-merge-conflicts', 'vihdzp', 'wwylele'] eric-wieser
assignee:eric-wieser
 none
74-63896
2 months ago
86-15242
86 days ago
88-49240
88 days
36219 gasparattila
author:gasparattila
 chore(Order/SupClosed): use `to_dual` --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-order 86/217 Mathlib/Order/ConditionallyCompleteLattice/Finset.lean,Mathlib/Order/SupClosed.lean 6 6 ['github-actions', 'mathlib-merge-conflicts'] bryangingechen
assignee:bryangingechen
 none
73-37200
2 months ago
37-17521
37 days ago
41-21444
41 days
34045 smmercuri
author:smmercuri
 feat: `algebraMap K L` is uniform continuous with respect to adic topologies, when the ideal `w` of `L` lies above `v` - `A` is a Dedekind domain with field of fractions `K`. - `B` is a Dedekind domain with field of fractions `L`. - `L` is a field extension of `K`. - `v` is a height one prime ideal of `A`. - `w` is a height one prime ideal of `B` lying over `v`. Then respective valuations are related via the ramification index, and `algebraMap (WithVal (v.valuation K)) (WithVal (w.valuation L))` is uniform continuous. --- - [x] depends on: #34049 - [x] depends on: #35972 - [x] depends on: #36144 - [x] depends on: #36310 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) FLT t-algebra t-number-theory
label:t-algebra$
 164/4 Mathlib.lean,Mathlib/Algebra/Order/Hom/Units.lean,Mathlib/NumberTheory/RamificationInertia/Valuation.lean,Mathlib/RingTheory/DedekindDomain/AdicValuation.lean,Mathlib/RingTheory/Valuation/Discrete/RankOne.lean,Mathlib/Topology/Algebra/Valued/WithVal.lean 5 10 ['dagurtomas', 'github-actions', 'jjdishere', 'mathlib-dependent-issues', 'mathlib-merge-conflicts', 'smmercuri'] alreadydone
assignee:alreadydone
 none
70-47154
2 months ago
25-29336
25 days ago
43-23588
43 days
37939 AntoineChambert-Loir
author:AntoineChambert-Loir
 feat(Order/Completion): embed a linear order into a dense and complete linear order The aim of the PR is to prove the following theorem that will be used as an input to [Sion.DMCompletion.exists_isSaddlePointOn](https://leanprover-community.github.io/mathlib4_docs/Mathlib/Topology/Sion.html#Sion.DMCompletion.exists_isSaddlePointOn) : *If `β` is any linear order, then there exists a complete and dense linear order `γ` together with a continuous embedding `ι : β ↪o γ` (for the order topologies on `β` and `γ`).* Meanwhile, the PR also records various instances about dense orders and lemmas regarding the Dedekind MacNeille completion and lexicographic orders. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-order 206/3 Mathlib.lean,Mathlib/Data/Prod/Lex.lean,Mathlib/Order/Completion.lean,Mathlib/Topology/Order/Completion.lean,Mathlib/Topology/Sion.lean 5 52 ['ADedecker', 'AntoineChambert-Loir', 'github-actions', 'mathlib-merge-conflicts', 'vihdzp'] vihdzp
assignee:vihdzp
 1
30-1509
1 month ago
30-22240
30 days ago
33-21651
33 days
38169 tb65536
author:tb65536
 chore(GroupTheory/Finiteness): make `Subgroup.FG` a class This PR refactors `Subgroup.FG` to be a class to match `Group.FG`. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra t-group-theory
label:t-algebra$
 37/20 Mathlib/GroupTheory/Commutator/Finite.lean,Mathlib/GroupTheory/Finiteness.lean,Mathlib/GroupTheory/Rank.lean,Mathlib/GroupTheory/Schreier.lean 4 10 ['JovanGerb', 'github-actions', 'mathlib-bors', 'riccardobrasca', 'tb65536'] riccardobrasca
assignee:riccardobrasca
 none
21-12817
21 days ago
21-26885
21 days ago
35-14756
35 days
37784 SnirBroshi
author:SnirBroshi
 feat(Order/ConditionallyCompleteLattice/Basic): `ConditionallyCompleteLinearOrderBot (WithBot α)` --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-order 29/0 Mathlib/Order/ConditionallyCompleteLattice/Basic.lean 1 1 ['github-actions'] bryangingechen
assignee:bryangingechen
 none
20-75082
20 days ago
44-71452
44 days ago
44-71164
44 days
38634 Maldooor
author:Maldooor
 feat(MeasureTheory): `restrict_absolutelyContinuous_restrict` Adding three lemmas about absolute continuity of restrictions of measures to subsets. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-measure-probability 19/0 Mathlib/MeasureTheory/Measure/Restrict.lean 1 4 ['EtienneC30', 'Maldooor', 'github-actions'] EtienneC30
assignee:EtienneC30
 none
19-42871
19 days ago
19-42871
19 days ago
21-73774
21 days
37179 IvanRenison
author:IvanRenison
 feat(Combinatorics/SimpleGraph): add lemmas about left and right elements of `SimpleGraph.sum` --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-combinatorics 18/0 Mathlib/Combinatorics/SimpleGraph/Sum.lean 1 3 ['WilliamCoram', 'github-actions'] b-mehta
assignee:b-mehta
 none
18-74871
18 days ago
58-4281
58 days ago
58-3993
58 days
38875 yuanyi-350
author:yuanyi-350
 refactor(MeasureTheory): golf `Mathlib/MeasureTheory/Covering/Besicovitch` - shortens the proof of `r_t0` in `exists_closedBall_covering_tsum_measure_le` by turning the contradiction argument into a direct lambda - replaces the manual `simp only` proof with `mem_iUnion₂` and a final `simp [r, this]` Extracted from #38104 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) codex LLM-generated t-measure-probability 3/8 Mathlib/MeasureTheory/Covering/Besicovitch.lean 1 2 ['github-actions', 'yuanyi-350'] RemyDegenne
assignee:RemyDegenne
 none
18-74859
18 days ago
19-31993
19 days ago
19-31705
19 days
38881 yuanyi-350
author:yuanyi-350
 refactor(MeasureTheory): golf `Mathlib/MeasureTheory/Function/StronglyMeasurable/Basic` - shortens `stronglyMeasurable_in_set` by inlining the restricted approximation sequence and folding the `hg_eq` / `hg_zero` helper lemmas into the two `by_cases` branches Extracted from #38104 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) codex LLM-generated t-measure-probability 7/13 Mathlib/MeasureTheory/Function/StronglyMeasurable/Basic.lean 1 2 ['github-actions', 'yuanyi-350'] kex-y
assignee:kex-y
 none
18-74855
18 days ago
19-29601
19 days ago
19-29313
19 days
38882 yuanyi-350
author:yuanyi-350
 refactor(MeasureTheory): golf `Mathlib/MeasureTheory/Function/AEMeasurableOrder` - replaces the manual `μ t = 0` to `ae` conversion with `measure_eq_zero_iff_ae_notMem` - rewrites the two density arguments in `aemeasurable_of_exist_almost_disjoint_supersets` using `s_dense.exists_between` and `mem_iUnion₂` Extracted from #38104 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) codex LLM-generated t-measure-probability 7/18 Mathlib/MeasureTheory/Function/AEMeasurableOrder.lean 1 2 ['github-actions', 'yuanyi-350'] kex-y
assignee:kex-y
 none
18-74854
18 days ago
19-29382
19 days ago
19-29094
19 days
38002 Raph-DG
author:Raph-DG
 feat(Topology): Relating irreducible components of a space to codimension one points in non dense subsets In this PR we show that the coheight zero points of a sober space (in the specialization order) correspond to the irreducible components. Furthermore, we show that the coheight one points of any non dense subset p of X (in the specialization order on p) have coheight zero in the specialization order on X. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) large-import t-topology 103/0 Mathlib/Order/Hom/Basic.lean,Mathlib/Order/KrullDimension.lean,Mathlib/Order/Minimal.lean,Mathlib/Topology/Inseparable.lean,Mathlib/Topology/Sober.lean 5 3 ['ADedecker', 'github-actions', 'mathlib-merge-conflicts'] urkud
assignee:urkud
 none
18-10935
18 days ago
18-10972
18 days ago
34-76357
34 days
32294 jsm28
author:jsm28
 feat(Geometry/Euclidean/Angle/Incenter): distance from second intersection with circumcircle Add the following lemma: given a triangle ABC, suppose an angle bisector from A through the incenter or excenter I meets the circumcircle again at X (including the case of an external bisector at A tangent to the circle, in which case X = A). Then XB = XI (= XC, by applying this lemma again). This is a standard configuration: https://en.wikipedia.org/wiki/Incenter%E2%80%93excenter_lemma --- - [ ] depends on: #30981 - [ ] depends on: #30982 - [ ] depends on: #32019 - [ ] depends on: #32021 - [ ] depends on: #32023 - [ ] depends on: #32270 - [ ] depends on: #32290 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-euclidean-geometry 189/0 Mathlib/Geometry/Euclidean/Angle/Incenter.lean 1 5 ['github-actions', 'jsm28', 'mathlib-dependent-issues', 'mathlib4-merge-conflict-bot', 'peakpoint'] eric-wieser
assignee:eric-wieser
 none
17-75089
17 days ago
56-13343
56 days ago
56-13845
56 days
38049 WilliamCoram
author:WilliamCoram
 feat: lemmas towards showing gaussNorm on MvPowerSeries is an absolute value We prove lemmas: ``gaussNorm_mul_le`` and ``gaussNorm_le_mul`` which will allow us to show it is an absolute value on Mv restricted power series. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-ring-theory new-contributor 144/1 Mathlib/RingTheory/MvPowerSeries/GaussNorm.lean 1 4 ['WilliamCoram', 'github-actions'] alreadydone
assignee:alreadydone
 none
17-75082
17 days ago
38-18027
38 days ago
38-17739
38 days
38883 yuanyi-350
author:yuanyi-350
 refactor(MeasureTheory): golf `Mathlib/MeasureTheory/Function/AEMeasurableSequence` - rewrites `iSup` by filtering directly along `aeSeq_eq_fun_ae hf hp`, instead of proving a subset statement about `aeSeqSet` and then using `measure_mono_null` Extracted from #38104 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) codex LLM-generated t-measure-probability 2/6 Mathlib/MeasureTheory/Function/AEMeasurableSequence.lean 1 2 ['github-actions', 'yuanyi-350'] kex-y
assignee:kex-y
 none
17-75075
17 days ago
19-29163
19 days ago
19-28875
19 days
37714 mortarsanjaya
author:mortarsanjaya
 feat(Algebra/Order/Floor/Defs): `Nat.cast` is strictly monotone in `FloorSemiring` and `FloorRing` As title says, and without the `IsOrderedRing` assumption. Other than that, I removed the `IsOrderedRing` assumption from pretty much all the lemmas in `Algebra/Order/Floor/Defs` that could possibly have this assumption removed, and reduced some `IsStrictOrderedRing` assumptions to `IsOrderedRing` + `Nontrivial`. Due to strict monotonicity, we can also provide `CharZero` instance on `FloorSemiring` and `FloorRing`. Thus we can remove the `NeZero` and `Nontrivial` instances on them. The changes on `/Ring` and `/Semiring` are trivial changes due to some lemmas not requiring an `IsOrderedRing` instance anymore. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra new-contributor
label:t-algebra$
 96/39 Mathlib/Algebra/ContinuedFractions/Computation/Approximations.lean,Mathlib/Algebra/ContinuedFractions/Computation/TerminatesIffRat.lean,Mathlib/Algebra/Order/Floor/Defs.lean,Mathlib/Algebra/Order/Floor/Ring.lean,Mathlib/Algebra/Order/Floor/Semiring.lean 5 24 ['dagurtomas', 'eric-wieser', 'github-actions', 'mathlib-bors', 'mortarsanjaya'] eric-wieser
assignee:eric-wieser
 none
17-59387
17 days ago
21-35158
21 days ago
45-34360
45 days
37062 tannerduve
author:tannerduve
 feat(Computability): Turing join and semilattice structure on Turing degrees ## Summary - Add `Partrec.kronecker` (equality test) and `Partrec.join` (disjoint union by parity) in `Partrec.lean` - Prove `Nat.RecursiveIn` is closed under computable conditionals (`cond_const`, `cond`) - Show each component reduces to the join (`left_le_join`, `right_le_join`) and the join is the least upper bound (`join_le`) - Establish `SemilatticeSup` instance on `TuringDegree` t-computability new-contributor large-import 311/15 Mathlib/Computability/Partrec.lean,Mathlib/Computability/RecursiveIn.lean,Mathlib/Computability/TuringDegree.lean 3 7 ['Komyyy', 'github-actions', 'mathlib-merge-conflicts', 'tannerduve'] Komyyy
assignee:Komyyy
 none
17-59295
17 days ago
39-24289
39 days ago
39-86295
39 days
38231 NoneMore
author:NoneMore
 feat(ModelTheory/Definablity): add syntax-to-definability bridge lemmas Add bridge lemmas from syntax to definability and refactor downstream proofs to use them. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-logic 88/56 Mathlib/ModelTheory/Definability.lean,Mathlib/ModelTheory/ElementarySubstructures.lean 2 1 ['github-actions'] fpvandoorn
assignee:fpvandoorn
 none
16-75098
16 days ago
33-60472
33 days ago
33-60184
33 days
38815 dagurtomas
author:dagurtomas
 feat(Tactic/CategoryTheory): extend `@[to_app]` to natural transformations This extends the `@[to_app]` attribute so it also generates componentwise lemmas from equalities of natural transformations between functors, while preserving the existing bicategory behavior. It also ensures generated component lemmas remain usable by dsimp when they are definitionally true. t-category-theory LLM-generated t-meta 148/22 Mathlib/Tactic/CategoryTheory/ToApp.lean,Mathlib/Util/AddRelatedDecl.lean,MathlibTest/CategoryTheory/ToApp.lean 3 1 ['github-actions'] kim-em
assignee:kim-em
 none
16-75092
16 days ago
21-14887
21 days ago
21-14653
21 days
38009 CBirkbeck
author:CBirkbeck
 feat(RingTheory/Valuation): define the valuation spectrum and its topology ## Summary Define the valuation spectrum `Spv A` of a commutative ring and equip it with the topology generated by basic open sets, following Wedhorn's *Adic Spaces*. Also define the pullback (`comap`) of a `ValuativeRel` along a ring homomorphism. This is preparation for later defining adic spaces. Note the code was generated by claude code, but I have cleaned up and pre-reviewed the work. t-ring-theory LLM-generated 362/0 Mathlib.lean,Mathlib/RingTheory/Valuation/ValuationSpectrum.lean,Mathlib/RingTheory/Valuation/ValuativeRel/Comap.lean 3 40 ['CBirkbeck', 'adamtopaz', 'chrisflav', 'dagurtomas', 'faenuccio', 'github-actions', 'jjdishere', 'riccardobrasca'] riccardobrasca
assignee:riccardobrasca
 none
16-54229
16 days ago
38-36146
38 days ago
38-36011
38 days
37310 CoolRmal
author:CoolRmal
 feat(MeasureTheory): uniformly distributed outer regular measures in a second countable pseudometric space are unique up to a finite constant In this PR we define uniformly distributed measures and prove [Christensen's Lemma](https://en.wikipedia.org/wiki/Spherical_measure), which says that uniformly distributed outer regular measures in a second countable pseudometric space are unique up to a finite constant. A classical application of Christensen's Lemma is to show that the restriction of the `n - 1`-dimensional Hausdorff measure onto an `n`-dimensional sphere coincides with the spherical measure. This will be done in another PR. --- - [x] depends on: #37311 - [x] depends on: #37312 - [x] depends on: #37313 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-measure-probability 201/1 Mathlib.lean,Mathlib/MeasureTheory/Measure/Regular.lean,Mathlib/MeasureTheory/Measure/UniformlyDistributed.lean,Mathlib/Order/LiminfLimsup.lean 4 17 ['CoolRmal', 'github-actions', 'mathlib-dependent-issues', 'mathlib-merge-conflicts', 'wwylele'] RemyDegenne
assignee:RemyDegenne
 none
16-33714
16 days ago
17-76828
17 days ago
21-20436
21 days
38885 yuanyi-350
author:yuanyi-350
 refactor(MeasureTheory): golf `Mathlib/MeasureTheory/Function/LpOrder` - rewrites `coeFn_nonneg` to use the `Lp.coeFn_zero` eventual equality directly via `trans_le`, instead of a separate `filter_upwards` proof Extracted from #38104 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) codex LLM-generated t-measure-probability 1/4 Mathlib/MeasureTheory/Function/LpOrder.lean 1 2 ['github-actions', 'yuanyi-350'] RemyDegenne
assignee:RemyDegenne
 none
15-74881
15 days ago
19-28730
19 days ago
19-28442
19 days
38886 yuanyi-350
author:yuanyi-350
 refactor(MeasureTheory): golf `Mathlib/MeasureTheory/Function/SimpleFuncDenseLp` - rewrites `measure_preimage_lt_top_of_memLp` via `FinMeasSupp.of_lintegral_ne_top` and `FinMeasSupp.map_iff`, instead of expanding `eLpNorm'` and splitting through `ENNReal.mul_lt_top_iff` Extracted from #38104 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) codex LLM-generated t-measure-probability 9/21 Mathlib/MeasureTheory/Function/SimpleFuncDenseLp.lean 1 2 ['github-actions', 'yuanyi-350'] RemyDegenne
assignee:RemyDegenne
 none
15-74880
15 days ago
19-28522
19 days ago
19-28234
19 days
38873 yuanyi-350
author:yuanyi-350
 refactor(MeasureTheory): golf `Mathlib/MeasureTheory/Constructions/BorelSpace/Real` - rewrites `measurable_const_mul` by splitting off the `c = 0` case and proving the nonzero case via `measurable_of_continuousOn_compl_singleton` - replaces the ad hoc case analysis on `⊥`, `⊤`, and real coefficients with a direct continuity argument for multiplication on `EReal` Extracted from #38104 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) codex LLM-generated t-measure-probability 5/19 Mathlib/MeasureTheory/Constructions/BorelSpace/Real.lean 1 3 ['LorenzoLuccioli', 'github-actions', 'yuanyi-350'] kex-y
assignee:kex-y
 1
15-58993
15 days ago
15-78303
15 days ago
19-2724
19 days
38527 archiebrowne
author:archiebrowne
 feat(Analysis/Calculus): continuously differentiable actions define the class `ContDiffSMul 𝕜 M X n` which asserts that the map `(c, x) ↦ c • x` is `n` times continuously differentiable on `M × X`. Many of the results are the C^n analogues of those in the module Mathlib.Topology.Algebra.MulAction. t-differential-geometry new-contributor 317/24 Mathlib.lean,Mathlib/Analysis/Calculus/BumpFunction/Basic.lean,Mathlib/Analysis/Calculus/ContDiff/Operations.lean,Mathlib/Analysis/Calculus/IteratedDeriv/Lemmas.lean,Mathlib/Analysis/ContDiffMulAction.lean,Mathlib/Analysis/InnerProductSpace/Calculus.lean 6 11 ['archiebrowne', 'github-actions', 'grunweg', 'peabrainiac'] PatrickMassot and grunweg
assignee:grunweg assignee:PatrickMassot
 none
15-5170
15 days ago
15-5245
15 days ago
22-77266
22 days
38903 lua-vr
author:lua-vr
 feat(Covering/Vitali): add `exists_disjoint_subfamily_covering_enlargement_ball` Adds the analogous version `exists_disjoint_subfamily_covering_enlargement_ball` of the Vitali covering theorem for open balls. For the Carleson project. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-measure-probability 37/0 Mathlib/MeasureTheory/Covering/Vitali.lean 1 2 ['github-actions'] EtienneC30
assignee:EtienneC30
 none
15-1305
15 days ago
18-50992
18 days ago
18-50704
18 days
38021 IvanRenison
author:IvanRenison
 feat(Data/Int/ModEq): add theorem `modEq_two_abs` --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-data 4/0 Mathlib/Data/Int/ModEq.lean 1 1 ['github-actions'] TwoFX
assignee:TwoFX
 none
14-74833
14 days ago
38-85140
38 days ago
38-84852
38 days
38198 JovanGerb
author:JovanGerb
 chore(Data/Real/Basic): `no_expose` the private operations This PR puts `no_expose` on all of the operations on `Real` that are defined in terms of quotients. This is a step in the direction of not exposing the definiton of `Real`. Note that I leave the `irreducible_def`s as is. This is because the `simpNF` linter does not participate in the module system, and it would time out otherwise. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-data 11/32 Mathlib/Analysis/SpecialFunctions/Gaussian/GaussianIntegral.lean,Mathlib/Data/Real/Basic.lean,Mathlib/Topology/Algebra/Valued/NormedValued.lean 3 11 ['JovanGerb', 'eric-wieser', 'github-actions', 'leanprover-radar'] TwoFX
assignee:TwoFX
 none
14-74830
14 days ago
34-46375
34 days ago
34-47028
34 days
38223 Deicyde
author:Deicyde
 feat(Geometry/Manifold): add `MfldCat`, the category of `C^n` manifolds We define `MfldCat 𝕜 n`: the category of `C^n` manifolds over a field `𝕜`, following the pattern of `TopCat` in `Mathlib.Topology.Category.TopCat.Basic`. We also implement `HasForget₂ (MfldCat 𝕜 n) TopCat`—the forgetful functor into the category of topological spaces. For more discussion see the Zulip thread: [#PR reviews > #38223 The Category of C^n Manifolds](https://leanprover.zulipchat.com/#narrow/channel/144837-PR-reviews/topic/.2338223.20The.20Category.20of.20C.5En.20Manifolds/with/587038032) Also added: `ContMDiffMap.id_apply`, `.coe_id` and `.coe_comp` which are comparable to `ContinuousMap` API. ### Future work - ✅ Define a Monoidal structure via product manifolds, analogous to `Manifold.Topology.Category.TopCat.Monoidal` #38560 - ✅ Define the tangent functor: `M ↦ TM`, `F ↦ F.tangentMap` from `MfldCat (n+1) 𝕜` to `MfldCat n 𝕜` #38270 - Functor `FGModuleCat 𝕜 ⥤ MfldCat 𝕜 n` sending a finite-dimensional `𝕜`-vector space to the manifold modeled on itself. Left as `TODO`. - Define `FGModuleCat 𝕜` as an enriched category over `MfldCat n 𝕜`. Then _smooth functors_ can be realized as endofunctors on the enriched category. This is the main motivation for this construction. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-differential-geometry new-contributor t-category-theory 224/0 Mathlib.lean,Mathlib/Geometry/Manifold/Category/MfldCat/Basic.lean,Mathlib/Geometry/Manifold/ContMDiffMap.lean 3 57 ['Deicyde', 'chrisflav', 'dagurtomas', 'github-actions', 'idontgetoutmuch', 'peabrainiac'] kim-em
assignee:kim-em
 1
14-4140
14 days ago
14-7564
14 days ago
27-57392
27 days

PRs with just failing CI, but only often-spurious jobs

Number Author Title Description Labels +/- Modified files (first 100) 📝 💬 All users who commented or reviewed Assignee(s) Updated Last status change total time in review
28803 astrainfinita
author:astrainfinita
 refactor: unbundle algebra from `ENormed*` Further speed up the search in the algebraic typeclass hierarchy by avoiding searching for `TopologicalSpace`. This PR continues the work from #23961. - Change `ESeminormed(Add)Monoid` and `ENormed(Add)Monoid` so they no longer carry algebraic data. - Deprecate `ESeminormed(Add)CommMonoid` and `ENormed(Add)CommMonoid` in favor of `ESeminormed(Add)Monoid` and `ENormed(Add)Monoid` with a commutative algebraic typeclass. |Old|New| |---|---| | `[ESeminormed(Add)(Comm)Monoid E]` | `[(Add)(Comm)Monoid E] [ESeminormed(Add)Monoid E]` | | `[ENormed(Add)(Comm)Monoid]` | `[(Add)(Comm)Monoid E] [ENormed(Add)Monoid]` | See [Zulip discussion](https://leanprover.zulipchat.com/#narrow/channel/144837-PR-reviews/topic/.2328803.20refactor.3A.20unbundle.20algebra.20from.20.60ENormed*.60/with/536024350) ------------ - [x] depends on: #28813 t-algebra merge-conflict slow-typeclass-synthesis awaiting-zulip t-analysis
label:t-algebra$
 80/63 Mathlib/Analysis/CStarAlgebra/CStarMatrix.lean,Mathlib/Analysis/Normed/Group/Basic.lean,Mathlib/Analysis/Normed/Group/Continuity.lean,Mathlib/Analysis/Normed/Group/InfiniteSum.lean,Mathlib/Analysis/NormedSpace/IndicatorFunction.lean,Mathlib/MeasureTheory/Function/L1Space/AEEqFun.lean,Mathlib/MeasureTheory/Function/L1Space/HasFiniteIntegral.lean,Mathlib/MeasureTheory/Function/L1Space/Integrable.lean,Mathlib/MeasureTheory/Function/LocallyIntegrable.lean,Mathlib/MeasureTheory/Function/LpSeminorm/Basic.lean,Mathlib/MeasureTheory/Function/LpSeminorm/CompareExp.lean,Mathlib/MeasureTheory/Function/LpSeminorm/TriangleInequality.lean,Mathlib/MeasureTheory/Integral/IntegrableOn.lean,Mathlib/MeasureTheory/Integral/IntervalIntegral/Basic.lean 14 28 ['astrainfinita', 'bryangingechen', 'github-actions', 'grunweg', 'kbuzzard', 'leanprover-bot', 'leanprover-community-mathlib4-bot', 'mathlib-bors', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot', 'sgouezel'] grunweg
assignee:grunweg
261-79680
8 months ago
270-30834
270 days ago
0-20585
5 hours
34875 banrovegrie
author:banrovegrie
 feat(LinearAlgebra/Matrix): add Sherman-Morrison formula Mathlib has the matrix determinant lemma (`det_add_replicateCol_mul_replicateRow` in SchurComplement.lean) but lacked the corresponding inverse formula. This PR fills that gap. - Add `Matrix.inv_add_vecMulVec`: Sherman-Morrison formula for `(A + uv^T)^{-1}` - Add `Matrix.inv_sub_vecMulVec`: subtraction variant - Add `Matrix.isUnit_det_add_vecMulVec`: invertibility under the formula's hypotheses ## Test plan - [x] `lake build` passes - [x] Lines within 100 char limit - [x] All declarations have docstrings **Any specific AI usage?**: Used Copilot for review purposes. t-algebra new-contributor awaiting-author
label:t-algebra$
 135/0 Mathlib.lean,Mathlib/LinearAlgebra/Matrix/ShermanMorrison.lean 2 14 ['Xxxjdjdid', 'banrovegrie', 'chrisflav', 'copilot-pull-request-reviewer', 'eric-wieser', 'github-actions', 'wwylele'] chrisflav
assignee:chrisflav
82-20269
2 months ago
37-17358
37 days ago
69-6728
69 days
30451 kckennylau
author:kckennylau
 feat(HomogeneousIdeal): generalize to homogeneous submodule Continuation of #30437 with permission from @jjaassoonn, which is a continuation of #9820 . The definitions, constructions and theorems in `HomogeneousIdeal.lean` are generalized to homogeneous submodules. Let `R` be a graded ring and `M` be a graded `R`-module. Say an `R`-submodule `N` of `M` is homogeneous if for every `x` in `N`, each projection of `x` to `M_i` is in `N`. None of this file's results depends on the grading on `R`, but we include the grading on `R` for technical reasons. We define the "homogeneous core" of a not necessarily homogeneous submodule N to be the biggest homogeneous submodule contained within N, and the "homogeneous hull" to be the smallest homogeneous submodule that contains N. All definitions/constructions/theorems are then copied for ideals/homogeneous ideals. The motivation of this generalization is graded quotient module. (#18716) --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-ring-theory awaiting-author merge-conflict 581/185 Mathlib/Algebra/BigOperators/Finsupp/Basic.lean,Mathlib/Algebra/DirectSum/Basic.lean,Mathlib/Algebra/DirectSum/Decomposition.lean,Mathlib/Algebra/DirectSum/Finsupp.lean,Mathlib/Algebra/Module/GradedModule.lean,Mathlib/AlgebraicGeometry/ProjectiveSpectrum/Basic.lean,Mathlib/AlgebraicGeometry/ProjectiveSpectrum/Scheme.lean,Mathlib/RingTheory/GradedAlgebra/Homogeneous/Ideal.lean,Mathlib/RingTheory/GradedAlgebra/Homogeneous/Submodule.lean,Mathlib/RingTheory/GradedAlgebra/Radical.lean 10 23 ['github-actions', 'mariainesdff', 'mathlib-merge-conflicts', 'mathlib4-merge-conflict-bot'] mariainesdff
assignee:mariainesdff
72-25788
2 months ago
72-25788
72 days ago
22-61538
22 days
33466 Shreyas4991
author:Shreyas4991
 refactor(Combinatorics/Digraph): add vertex sets --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-combinatorics merge-conflict please-adopt 382/55 Mathlib/Combinatorics/Digraph/Basic.lean,Mathlib/Combinatorics/Digraph/Orientation.lean 2 83 ['IvanRenison', 'Shreyas4991', 'SnirBroshi', 'YaelDillies', 'copilot-pull-request-reviewer', 'github-actions', 'mathlib-merge-conflicts', 'mathlib4-merge-conflict-bot', 'vihdzp', 'vlad902'] awainverse
assignee:awainverse
70-57497
2 months ago
70-57497
70 days ago
27-54087
27 days
37556 edwin1729
author:edwin1729
 feat(Topology/Order): Locale.localePointOfSpacePoint if we have a Scott Topology from an Algebraic DCPO (3/4) in a series of PRs proving that "Scott Topologies over Algebraic DCPOs are Sober" We prove here that the unit of the adjunction from `TopCat` to `Locale` defined in `Topology/Order/Category/FrameAdjunction.lean` is a surjective mapping, under the following condition: The underlying TopologicalSpace must be a Scott Topology generated with an underlying Algebraic DCPO structure. - [ ] depends on: #37445 --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-topology new-contributor blocked-by-other-PR merge-conflict 393/1 Mathlib.lean,Mathlib/Topology/Order/ScottTopology.lean,Mathlib/Topology/Order/ScottTopologyDCPO.lean,docs/references.bib 4 5 ['github-actions', 'mathlib-dependent-issues', 'mathlib-merge-conflicts'] nobody
24-80885
24 days ago
50-18985
50 days ago
0-1300
21 minutes
38169 tb65536
author:tb65536
 chore(GroupTheory/Finiteness): make `Subgroup.FG` a class This PR refactors `Subgroup.FG` to be a class to match `Group.FG`. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra t-group-theory
label:t-algebra$
 37/20 Mathlib/GroupTheory/Commutator/Finite.lean,Mathlib/GroupTheory/Finiteness.lean,Mathlib/GroupTheory/Rank.lean,Mathlib/GroupTheory/Schreier.lean 4 10 ['JovanGerb', 'github-actions', 'mathlib-bors', 'riccardobrasca', 'tb65536'] riccardobrasca
assignee:riccardobrasca
21-12817
21 days ago
21-26885
21 days ago
35-14756
35 days
36896 PieterCuijpers
author:PieterCuijpers
 feat (Algebra/Order/Quantale): isMulLeftsided, isMulRightsided, isMulTwosided and strict versions * Adding definitions of quantale elements being leftsided, rightsided, and twosided, and strict versions Should we include these definitions in the main Algebra/Order/Quantale.lean file, or start a separate file for them? I have a few basic theorems I would like to include on these notions, but invite suggestions. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra new-contributor awaiting-author
label:t-algebra$
 81/1 Mathlib/Algebra/Order/Quantale.lean 1 5 ['NoahW314', 'PieterCuijpers', 'chrisflav', 'github-actions'] mariainesdff
assignee:mariainesdff
17-30978
17 days ago
24-23233
24 days ago
39-18222
39 days
39041 themathqueen
author:themathqueen
 refactor(Analysis/InnerProductSpace/Projection): redefine `orthogonalProjectionOnto` via `projectionOntoL` Now that we have `IsTopCompl` and `projectionOntoL`, we can define `orthogonalProjectionOnto` directly this way instead of needing an implementation definition. --- - [ ] depends on: #38970 Zulip thread: [#mathlib4 > refactoring `Submodule.orthogonalProjection`](https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/refactoring.20.60Submodule.2EorthogonalProjection.60/with/593516136) [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) blocked-by-other-PR t-analysis 339/288 Mathlib/Analysis/InnerProductSpace/Adjoint.lean,Mathlib/Analysis/InnerProductSpace/GramSchmidtOrtho.lean,Mathlib/Analysis/InnerProductSpace/MeanErgodic.lean,Mathlib/Analysis/InnerProductSpace/PiL2.lean,Mathlib/Analysis/InnerProductSpace/Positive.lean,Mathlib/Analysis/InnerProductSpace/ProdL2.lean,Mathlib/Analysis/InnerProductSpace/Projection/Basic.lean,Mathlib/Analysis/InnerProductSpace/Projection/FiniteDimensional.lean,Mathlib/Analysis/InnerProductSpace/Projection/Reflection.lean,Mathlib/Analysis/InnerProductSpace/Projection/Submodule.lean,Mathlib/Analysis/InnerProductSpace/Spectrum.lean,Mathlib/Analysis/InnerProductSpace/l2Space.lean,Mathlib/Geometry/Euclidean/Inversion/Calculus.lean,Mathlib/Geometry/Euclidean/Projection.lean,Mathlib/Geometry/Euclidean/Volume/Measure.lean,Mathlib/Geometry/Manifold/Instances/Sphere.lean,Mathlib/LinearAlgebra/Projection.lean,Mathlib/MeasureTheory/Function/ConditionalExpectation/CondexpL2.lean,Mathlib/MeasureTheory/Measure/Hausdorff.lean,Mathlib/Topology/MetricSpace/HausdorffDimension.lean,docs/overview.yaml,docs/undergrad.yaml 22 2 ['github-actions', 'mathlib-dependent-issues'] nobody
14-41653
14 days ago
15-18632
15 days ago
0-1
1 second
39108 idontgetoutmuch
author:idontgetoutmuch
 feat(Geometry/Manifold/GroupLieAlgebra): Add mfderiv_mul_left_mul and left-translate for integral curves Add the following: `mfderiv_mul_left_mul`: the derivative of left-multiplication satisfies a chain rule: $$d(L_{g \cdot h})_x = d(L_g)_{h \cdot x} \circ d(L_h)_x$$ `mulInvariantVectorField_mul`: the vector field at the translated point is the push forward of the vector field: $$V(g \cdot h) = d(L_g)_h(V(h))$$ `IsMIntegralCurve.left_translate`: using these, if $\gamma$ is an integral curve of $V$, then so is $t \mapsto g \bullet \gamma(t)$ for any $g \in G$, since: $$\frac{d}{dt}(g \bullet \gamma(t)) = d(L_g)_{\gamma(t)}\left(\frac{d\gamma}{dt}(t)\right) = d(L_g)_{\gamma(t)}(V(\gamma(t))) = V(g \bullet \gamma(t))$$ I argue (*) all the time with LLMs so this PR will certainly have had some input from them. Is that enough of a disclosure? (*) Like Lewis Carroll: In my youth said the sage I took to the law and argued each case with wife And the muscular strength that it gave to my jaw has lasted the rest of my life t-differential-geometry new-contributor awaiting-author LLM-generated 73/0 Mathlib/Geometry/Manifold/GroupLieAlgebra.lean 1 8 ['github-actions', 'grunweg'] nobody
13-14700
13 days ago
13-14765
13 days ago
0-37992
10 hours
38649 chrisflav
author:chrisflav
 chore(RingTheory): equality of linear map with values in finite module spreads out We add some corollaries of `Module.Finite.exists_smul_of_comp_eq_of_isLocalizedModule`. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-ring-theory large-import 75/1 Mathlib/Algebra/Module/FinitePresentation.lean,Mathlib/RingTheory/Localization/BaseChange.lean,Mathlib/RingTheory/Localization/Module.lean 3 2 ['github-actions'] alreadydone
assignee:alreadydone
11-74514
11 days ago
24-27263
24 days ago
24-26975
24 days
39347 Sfgangloff
author:Sfgangloff
 feat(SymbolicDynamics): refactor of Pattern and shift-invariance of shape languages for subshifts ## Summary This PR refactors Pattern.mulShift in Mathlib/Dynamics/SymbolicDynamics/Basic.lean and uses the cleaner definition to prove shift-invariance of the language of a subshift on a finite shape. ## Changes Pattern.mulShift now returns a Pattern instead of a configuration (more natural). - Old type: Pattern.mulShift : Pattern A G → G → (G → A) - New type: Pattern.mulShift : Pattern A G → G → Pattern A G - The result carries its support (p.support.image (v * ·)) and the default-outside-support proof, so callers don't have to re-derive them. The [IsLeftCancelMul G] hypothesis is moved to the lemmas that actually use it. - The definition Pattern.mulShift itself no longer needs left-cancellation (it only chooses a preimage noncomputably). - The hypothesis is now stated on mulShift_config_apply_mul_left_of_mem and mulOccursInAt_eq_cylinder directly, instead of being a section-level variable. Renames following the type change. - mulShift_apply_mul_left_of_mem → mulShift_config_apply_mul_left_of_mem (because we now write (p.mulShift v).config instead of p.mulShift v). New @[simp] and @[ext] lemmas for Pattern. - Pattern.ext: two patterns are equal iff their supports agree and their configurations agree on the support. - Pattern.mulShift_support: the support of p.mulShift v is p.support.image (v * ·). - Pattern.fromConfig_support: the support of fromConfig x U is U. - Pattern.fromConfig_config_of_mem: on its support, fromConfig x U agrees with x. New lemma Pattern.fromConfig_mulShift. For a left inverse g' * g = 1, shifting the pattern fromConfig x U by g equals fromConfig (mulShift g' x) (U.image (g * ·)). New theorem MulSubshift.languageOn_image_mulShift. For a subshift Y and elements g, g' with g * g' = 1 and g' * g = 1: (fun p => p.mulShift g) '' Y.languageOn U = Y.languageOn (U.image (g * ·)) i.e. the language on the translated shape is exactly the image of the language on U under the pattern-shift map. This gives a bijection between Y.languageOn U and Y.languageOn (U.image (g * ·)), with inverse p ↦ p.mulShift g'. Stated for left-cancellative monoids with an invertible element. Updated docstrings for Pattern.mulShift and the renamed lemma to reflect the bundled-Pattern return type and clarify which results need [IsLeftCancelMul G]. t-dynamics new-contributor 142/48 Mathlib/Dynamics/SymbolicDynamics/Basic.lean 1 3 ['github-actions'] nobody
8-69328
8 days ago
8-69489
8 days ago
8-69201
8 days
39388 marcelolynch
author:marcelolynch
 chore: remove @[expose] from def-free public sections Strip `@[expose]` from `public section` headers in 100 modules where no declaration needs its body visible downstream. A new sweep in the style of #38480 Found using the linter-in-progress: #39387 Relevant Zulip thread: https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/Removing.20unnecessary.20.60.40.5Bexpose.5D.60/with/595180230 100/100 Mathlib/Algebra/Category/Ring/Small.lean,Mathlib/Algebra/Field/Basic.lean,Mathlib/Algebra/Field/MinimalAxioms.lean,Mathlib/Algebra/Field/Opposite.lean,Mathlib/Algebra/Field/Rat.lean,Mathlib/Algebra/Field/ULift.lean,Mathlib/Algebra/Field/ZMod.lean,Mathlib/Algebra/Group/Action/Option.lean,Mathlib/Algebra/Group/Action/Sigma.lean,Mathlib/Algebra/Group/Action/Sum.lean,Mathlib/Algebra/Group/Action/Units.lean,Mathlib/Algebra/Group/Subgroup/Actions.lean,Mathlib/Algebra/Group/Submonoid/MulAction.lean,Mathlib/Algebra/Module/Projective.lean,Mathlib/Algebra/Module/Submodule/Basic.lean,Mathlib/Algebra/NonAssoc/LieAdmissible/Defs.lean,Mathlib/Algebra/Notation/Prod.lean,Mathlib/Algebra/Order/Floor/Div.lean,Mathlib/Algebra/Order/Group/Action/End.lean,Mathlib/Algebra/Order/Group/End.lean,Mathlib/Algebra/Order/Group/PosPart.lean,Mathlib/Algebra/Order/Kleene.lean,Mathlib/Algebra/Order/Nonneg/Lattice.lean,Mathlib/Algebra/Order/Pi.lean,Mathlib/Algebra/Order/Ring/Unbundled/Rat.lean,Mathlib/Algebra/Ring/Commute.lean,Mathlib/AlgebraicTopology/ModelCategory/Over.lean,Mathlib/Analysis/InnerProductSpace/Coalgebra.lean,Mathlib/Analysis/Normed/Algebra/TrivSqZeroExt.lean,Mathlib/Analysis/Normed/Group/Constructions.lean,Mathlib/Analysis/Normed/Module/MStructure.lean,Mathlib/Analysis/Normed/Operator/Compact/FiniteDimension.lean,Mathlib/Analysis/ODE/DiscreteGronwall.lean,Mathlib/CategoryTheory/Localization/DerivabilityStructure/OfLocalizedEquivalences.lean,Mathlib/CategoryTheory/MarkovCategory/Positive.lean,Mathlib/CategoryTheory/Monoidal/Cartesian/Normal.lean,Mathlib/CategoryTheory/Monoidal/Functor/Types.lean,Mathlib/CategoryTheory/Monoidal/Types/Coyoneda.lean,Mathlib/CategoryTheory/Sites/CoversTop/Over.lean,Mathlib/Combinatorics/Additive/FreimanHom.lean,Mathlib/Computability/AkraBazzi/AkraBazzi.lean,Mathlib/Data/ENNReal/Action.lean,Mathlib/Data/ENat/Pow.lean,Mathlib/Data/Finsupp/Pointwise.lean,Mathlib/Data/FunLike/Basic.lean,Mathlib/Data/FunLike/Embedding.lean,Mathlib/Data/FunLike/Equiv.lean,Mathlib/Data/Int/Cast/Pi.lean,Mathlib/Data/List/Monad.lean,Mathlib/Data/NNRat/Lemmas.lean,Mathlib/Data/Nat/Lattice.lean,Mathlib/Data/Prod/Lex.lean,Mathlib/Data/Rat/Cast/Defs.lean,Mathlib/Data/Rat/Cast/OfScientific.lean,Mathlib/Data/Real/Archimedean.lean,Mathlib/Data/ZMod/IntUnitsPower.lean,Mathlib/GroupTheory/GroupAction/Embedding.lean,Mathlib/GroupTheory/IsPerfect.lean,Mathlib/GroupTheory/ResiduallyFinite.lean,Mathlib/LinearAlgebra/CliffordAlgebra/Star.lean,Mathlib/LinearAlgebra/Projectivization/Action.lean,Mathlib/LinearAlgebra/RootSystem/GeckConstruction/Semisimple.lean,Mathlib/MeasureTheory/Function/L2Space.lean,Mathlib/MeasureTheory/Integral/IntegralEqImproper.lean,Mathlib/MeasureTheory/Measure/Sub.lean,Mathlib/MeasureTheory/Measure/Typeclasses/ZeroOne.lean,Mathlib/NumberTheory/ModularForms/EisensteinSeries/E2/Transform.lean,Mathlib/NumberTheory/NumberField/ExistsRamified.lean,Mathlib/NumberTheory/Padics/PadicVal/Defs.lean,Mathlib/Order/ConditionallyCompleteLattice/Basic.lean,Mathlib/Order/Filter/FilterProduct.lean,Mathlib/Order/Heyting/Basic.lean,Mathlib/Order/Interval/Set/OrdConnected.lean,Mathlib/Order/Quotient.lean,Mathlib/Probability/Kernel/Deterministic.lean,Mathlib/RingTheory/Coalgebra/Convolution.lean,Mathlib/RingTheory/Flat/IsBaseChange.lean,Mathlib/RingTheory/HopfAlgebra/TensorProduct.lean,Mathlib/RingTheory/Ideal/GoingDown.lean,Mathlib/RingTheory/Ideal/GoingUp.lean,Mathlib/RingTheory/Ideal/Maximal.lean,Mathlib/RingTheory/Localization/Finiteness.lean,Mathlib/RingTheory/Noetherian/Defs.lean,Mathlib/RingTheory/QuasiFinite/Basic.lean,Mathlib/RingTheory/QuasiFinite/Polynomial.lean,Mathlib/RingTheory/QuasiFinite/Weakly.lean,Mathlib/RingTheory/Regular/ProjectiveDimension.lean,Mathlib/RingTheory/SimpleModule/Basic.lean,Mathlib/RingTheory/Smooth/Fiber.lean,Mathlib/RingTheory/TensorProduct/IsBaseChangeRightExact.lean,Mathlib/RingTheory/Unramified/LocalRing.lean,Mathlib/RingTheory/Valuation/Extension.lean,Mathlib/RingTheory/Valuation/IsTrivialOn.lean,Mathlib/SetTheory/Cardinal/Regular.lean,Mathlib/Tactic/Algebra/Lemmas.lean,Mathlib/Topology/Algebra/UniformMulAction.lean,Mathlib/Topology/CWComplex/Classical/Subcomplex.lean,Mathlib/Topology/EMetricSpace/Pi.lean,Mathlib/Topology/List.lean,Mathlib/Topology/MetricSpace/Pseudo/Pi.lean 100 6 ['eric-wieser', 'github-actions', 'grunweg', 'marcelolynch', 'urkud'] nobody
6-33896
6 days ago
8-11665
8 days ago
8-11377
8 days
32828 Hagb
author:Hagb
 feat(Algebra/Order/Group/Defs): add `IsOrderedAddMonoid.toIsOrderedCancelAddMonoid'` It is similar to `IsOrderedAddMonoid.toIsOrderedCancelAddMonoid`, while with different hypotheses. The conclusion `IsOrderedCancelMonoid α` on `IsOrderedAddMonoid.toIsOrderedCancelAddMonoid` still holds when the hypothesis `CommGroup α` is weakened to `CancelCommMonoid α` while `PartialOrder α` is strengthened to `LinearOrder α`. --- [`IsOrderedAddMonoid.toIsOrderedCancelAddMonoid`](https://leanprover-community.github.io/mathlib4_docs/find/?pattern=IsOrderedAddMonoid.toIsOrderedCancelAddMonoid#doc) and `IsOrderedAddMonoid.toIsOrderedCancelAddMonoid'`: https://github.com/leanprover-community/mathlib4/blob/97f78b1a4311fed1844b94f1c069219a48a098e1/Mathlib/Algebra/Order/Group/Defs.lean#L52-L62 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) awaiting-zulip t-algebra awaiting-author
label:t-algebra$
 4/0 Mathlib/Algebra/Order/Group/Defs.lean 1 15 ['Garmelon', 'Hagb', 'Vierkantor', 'artie2000', 'dagurtomas', 'github-actions', 'leanprover-radar'] eric-wieser
assignee:eric-wieser
5-72742
5 days ago
120-22765
120 days ago
40-42357
40 days
39452 Deicyde
author:Deicyde
 chore: Move `UnitAddTorus` to Topology/Instances/AddCircle/Real.lean Previous location of `UnitAddTorus` in Analysis/Fourier/AddCircleMulti.lean was ad-hoc and required users to import the entire Fourier analysis infrastructure just to use the torus. I suggest moving it to it's natural home beside `UnitAddCircle`. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-topology new-contributor 3/3 Mathlib/Analysis/Fourier/AddCircleMulti.lean,Mathlib/Topology/Instances/AddCircle/Real.lean 2 3 ['github-actions'] PatrickMassot
assignee:PatrickMassot
2-74234
2 days ago
6-74959
6 days ago
6-74671
6 days
39556 b-mehta
author:b-mehta
 feat(Data/Finset): add InjOn variants of image_{subset,eq}_image_iff These are useful for set family combinatorics --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) easy t-data ready-to-merge merge-conflict 18/0 Mathlib/Data/Finset/Image.lean,Mathlib/Data/Finset/Powerset.lean 2 3 ['github-actions', 'mathlib-bors', 'mathlib-merge-conflicts', 'ocfnash'] nobody
2-70207
2 days ago
3-31479
3 days ago
0-50919
14 hours
37753 JovanGerb
author:JovanGerb
 chore(Order/Filter/Basic): use `to_dual` for `≤ᶠ` Use `to_dual` on lemmas about `EventuallyLE`. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-order 19/6 Mathlib/Order/Filter/Basic.lean 1 2 ['github-actions', 'vihdzp'] nobody
1-75786
1 day ago
45-26092
45 days ago
45-25804
45 days
29764 ScottCarnahan
author:ScottCarnahan
 feat(Algebra/Vertex): API up to residue products (WIP) This PR contains definitions leading up to the residue product of vertex operators and some basic properties. Parts will be split off as smaller PRs when I have time. --- - [ ] depends on: #25831 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra blocked-by-other-PR large-import merge-conflict WIP
label:t-algebra$
 1692/19 Mathlib.lean,Mathlib/Algebra/BigOperators/Finprod.lean,Mathlib/Algebra/Lie/Loop.lean,Mathlib/Algebra/MvPolynomial/Degrees.lean,Mathlib/Algebra/MvPolynomial/Equiv.lean,Mathlib/Algebra/MvPolynomial/RestrictedValue.lean,Mathlib/Algebra/Vertex/HVertexOperator.lean,Mathlib/Algebra/Vertex/VertexOperator.lean,Mathlib/RingTheory/Binomial.lean,Mathlib/RingTheory/HahnSeries/Addition.lean,Mathlib/RingTheory/HahnSeries/Binomial.lean,Mathlib/RingTheory/HahnSeries/HEval.lean,Mathlib/RingTheory/HahnSeries/Multiplication.lean,Mathlib/RingTheory/HahnSeries/Summable.lean,Mathlib/RingTheory/Polynomial/Pochhammer.lean 15 6 ['github-actions', 'mathlib-merge-conflicts', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
1-59694
1 day ago
246-26179
246 days ago
0-12586
3 hours
39630 urkud
author:urkud
 feat(Sheaves/EtaleSpace): new file Written for the Cauchy integral theorem project at ICERM. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-topology 164/0 Mathlib.lean,Mathlib/Topology/Sheaves/EtaleSpace.lean 2 2 ['github-actions', 'mathlib-bors'] nobody
1-20211
1 day ago
1-20278
1 day ago
1-20001
1 day
39666 kim-em
author:kim-em
 feat(ci): cross-reference tag review via post-build lint + workflow_run Cross-reference tag review for PRs adding `@[stacks ...]`, `@[kerodon ...]`, or `@[wikidata ...]` attributes — implemented as a post-build lint step plus a `workflow_run`-triggered companion that posts the bot comment. **Why this shape.** The previous iteration of this PR ran an independent `pull_request_target` workflow that text-parsed PR source files. That was a workaround for not having a built Mathlib environment available in CI. With a post-build lint step we _do_ have the elaborated environment — so we read `Mathlib.CrossRef.tagExt` directly via `importModules (loadExts := true)` and cut ~250 LOC of bespoke byte-level scanner. **The three pieces:** - `scripts/crossref.lean` — the `extract` subcommand is gone. New `check --diff --tsv ` subcommand walks `tagExt`, looks up each tagged declaration's source module via `env.getModuleFor?`, filters by `git diff --name-only` of the PR range, and writes a machine-readable TSV. No Markdown, no network, no snippet fetching — that's the privileged workflow's job. Note: `withImportModules` passes `loadExts := false` and would leave `tagExt` empty for imported modules; we use `importModules (loadExts := true)` instead. - `.github/workflows/build_template.yml` — three new steps in `post_steps`, after the existing import-graph upload: 1. `lake env lean --run scripts/crossref.lean check --diff "${BASE_SHA}..HEAD" --tsv crossref-added.tsv` 2. Write `crossref-context.json` carrying the PR number and head SHA (so the `workflow_run` job doesn't have to rely on the unreliable `workflow_run.pull_requests[0].number`). 3. Upload both as a single `crossref-context` artifact. - `.github/workflows/crossref_review.yml` — rewritten. Trigger flips from `pull_request_target` to `workflow_run` on the build workflows. Downloads the artifact, resolves the PR number through a three-stage fallback (artifact JSON → workflow_run payload → `gh pr list` head SHA match), calls the mathlib-ci orchestrator (which now consumes the TSV and fetches snippets in Python directly with parallel `ThreadPoolExecutor` for Stacks/Kerodon), and posts via `update_PR_comment.sh`. Fails the check on any `missing` tag. **Privilege model.** The lint step runs with the PR's permissions and produces only a machine-readable TSV. The `workflow_run` job runs in the base ref's permission scope (with `pull-requests: write`), never executes anything from the artifact, fetches snippets server-side from three fixed upstream APIs, and builds the Markdown comment in trusted code. - [x] depends on: #39664 - [x] depends on: https://github.com/leanprover-community/mathlib-ci/pull/39 (rewrites the orchestrator to consume the TSV) 🤖 Prepared with Claude Code blocked-by-other-PR 1182/25 .github/workflows/build_template.yml,.github/workflows/crossref_review.yml,Mathlib.lean,Mathlib/Tactic.lean,Mathlib/Tactic/CrossRef/Fetch.lean,Mathlib/Tactic/CrossRefAttribute.lean,Mathlib/Tactic/Widget/CrossRefHover.lean,docs/workflows.md,scripts/README.md,scripts/crossref.lean 10 3 ['github-actions', 'kim-em', 'mathlib-dependent-issues'] nobody
0-34461
9 hours ago
unknown
0-0
0 seconds

PRs addressing technical debt

Number Author Title Description Labels +/- Modified files (first 100) 📝 💬 All users who commented or reviewed Assignee(s) Updated Last status change total time in review
13791 digama0
author:digama0
 refactor: Primrec and Partrec General cleanup of the `Primrec` and `Partrec` files, to better adjust to lean 4 things. The main user-visible change is that `Primrec₂` is no longer a `def` but an `abbrev`, because it was causing inference issues in lean 4. I also removed all the nonterminal `simp`s in `PartrecCode.lean`. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-computability tech debt 585/778 Mathlib/Computability/Ackermann.lean,Mathlib/Computability/Halting.lean,Mathlib/Computability/Partrec.lean,Mathlib/Computability/PartrecCode.lean,Mathlib/Computability/Primrec.lean 5 2 ['github-actions', 'grunweg'] nobody
642-6138
1 year ago
705-82124
705 days ago
1-84718
1 day
15448 urkud
author:urkud
 chore(*): deprecate `Option.elim'` Use `Option.elim` instead. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict awaiting-author tech debt 54/50 Mathlib/Algebra/BigOperators/Option.lean,Mathlib/Algebra/MvPolynomial/Equiv.lean,Mathlib/Algebra/MvPolynomial/Variables.lean,Mathlib/Analysis/BoxIntegral/Partition/Additive.lean,Mathlib/Analysis/BoxIntegral/Partition/Basic.lean,Mathlib/Analysis/BoxIntegral/Partition/Split.lean,Mathlib/Analysis/Calculus/LagrangeMultipliers.lean,Mathlib/CategoryTheory/Category/PartialFun.lean,Mathlib/Computability/TMToPartrec.lean,Mathlib/Data/Option/Defs.lean,Mathlib/LinearAlgebra/Basis.lean,Mathlib/Logic/Embedding/Set.lean,Mathlib/Logic/Equiv/Basic.lean,Mathlib/MeasureTheory/OuterMeasure/Induced.lean,Mathlib/NumberTheory/Dioph.lean,Mathlib/Topology/Compactness/Paracompact.lean,Mathlib/Topology/LocallyFinite.lean 17 12 ['Ruben-VandeVelde', 'YaelDillies', 'github-actions', 'grunweg', 'urkud'] nobody
641-16103
1 year ago
650-62265
650 days ago
7-18420
7 days
33138 gasparattila
author:gasparattila
 chore(MeasureTheory/Measure/Stieltjes): remove `backward.privateInPublic` In #32482, some definitions in this file were rewritten using private declarations. However, this made `StieltjesFunction.length` unusable, since its API uses private declarations even in statements. This PR fixes this by problem by specializing `length_eq` to `NoMinOrder` and adding a new lemma for the `OrderBot` case. The other lemmas involving the private declarations are made private, except for `length_subadditive_Icc_Ioo`, which is reverted to the previous statement. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-measure-probability tech debt awaiting-author 35/30 Mathlib/MeasureTheory/Measure/Stieltjes.lean 1 6 ['github-actions', 'grunweg', 'sgouezel', 'vihdzp'] sgouezel
assignee:sgouezel
148-376
4 months ago
148-376
148 days ago
5-1594
5 days
12879 grunweg
author:grunweg
 feat: port ge_or_gt linter from mathlib3 Code works and is essentially green: next step is to split up into separate PRs. Feedback welcome on whether: - all the test changes are good, or I should simply allow it in more cases - if calc blocks need to be explicitly exempt --- - [ ] depends on: #12933 - [ ] depends on: #12934 - [ ] depends on: #12931 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-linter tech debt blocked-by-other-PR 736/319 Archive/Imo/Imo1960Q1.lean,Archive/Imo/Imo1962Q1.lean,Archive/Imo/Imo1988Q6.lean,Archive/Imo/Imo1994Q1.lean,Archive/Imo/Imo2001Q2.lean,Archive/Imo/Imo2005Q3.lean,Archive/Imo/Imo2006Q3.lean,Archive/Imo/Imo2008Q2.lean,Archive/Imo/Imo2008Q3.lean,Archive/Imo/Imo2008Q4.lean,Archive/Imo/Imo2011Q5.lean,Archive/Imo/Imo2019Q4.lean,Archive/Sensitivity.lean,Archive/Wiedijk100Theorems/AreaOfACircle.lean,Archive/Wiedijk100Theorems/BallotProblem.lean,Archive/Wiedijk100Theorems/BirthdayProblem.lean,Archive/Wiedijk100Theorems/CubingACube.lean,Mathlib.lean,Mathlib/Algebra/DualNumber.lean,Mathlib/Algebra/Order/CauSeq/BigOperators.lean,Mathlib/Algebra/Order/Field/Basic.lean,Mathlib/Algebra/Order/Ring/Defs.lean,Mathlib/Algebra/Polynomial/Basic.lean,Mathlib/Algebra/Polynomial/Degree/Definitions.lean,Mathlib/Algebra/Star/CHSH.lean,Mathlib/Analysis/Analytic/Basic.lean,Mathlib/Analysis/Calculus/UniformLimitsDeriv.lean,Mathlib/Analysis/Complex/Hadamard.lean,Mathlib/Analysis/Complex/UpperHalfPlane/Basic.lean,Mathlib/Analysis/InnerProductSpace/Projection.lean,Mathlib/Analysis/Normed/Group/ControlledClosure.lean,Mathlib/Analysis/NormedSpace/MStructure.lean,Mathlib/Analysis/SpecialFunctions/Log/Base.lean,Mathlib/Analysis/SpecialFunctions/Trigonometric/Basic.lean,Mathlib/Combinatorics/SimpleGraph/DegreeSum.lean,Mathlib/Combinatorics/SimpleGraph/LapMatrix.lean,Mathlib/Computability/AkraBazzi/AkraBazzi.lean,Mathlib/Computability/AkraBazzi/GrowsPolynomially.lean,Mathlib/Data/Complex/Basic.lean,Mathlib/Data/FP/Basic.lean,Mathlib/Data/Finset/Basic.lean,Mathlib/Data/Finset/Fold.lean,Mathlib/Data/Finsupp/Notation.lean,Mathlib/Data/Int/Lemmas.lean,Mathlib/Data/Nat/Dist.lean,Mathlib/Data/Nat/Lattice.lean,Mathlib/Data/Nat/Parity.lean,Mathlib/Data/Nat/Upto.lean,Mathlib/Data/Ordmap/Ordset.lean,Mathlib/Data/PNat/Basic.lean,Mathlib/Data/UInt.lean,Mathlib/GroupTheory/Coxeter/Length.lean,Mathlib/MeasureTheory/Constructions/Polish.lean,Mathlib/MeasureTheory/Covering/Besicovitch.lean,Mathlib/MeasureTheory/Covering/Vitali.lean,Mathlib/MeasureTheory/Covering/VitaliFamily.lean,Mathlib/MeasureTheory/Integral/Layercake.lean,Mathlib/NumberTheory/LegendreSymbol/JacobiSymbol.lean,Mathlib/NumberTheory/Padics/Hensel.lean,Mathlib/NumberTheory/Padics/PadicNorm.lean,Mathlib/NumberTheory/PellMatiyasevic.lean,Mathlib/NumberTheory/Rayleigh.lean,Mathlib/Order/Filter/AtTopBot.lean,Mathlib/Probability/Process/Stopping.lean,Mathlib/RingTheory/Adjoin/Basic.lean,Mathlib/RingTheory/Polynomial/Basic.lean,Mathlib/SetTheory/Ordinal/Notation.lean,Mathlib/Tactic.lean,Mathlib/Tactic/CancelDenoms/Core.lean,Mathlib/Tactic/Common.lean,Mathlib/Tactic/IntervalCases.lean,Mathlib/Tactic/Linarith/Datatypes.lean,Mathlib/Tactic/Linarith/Lemmas.lean,Mathlib/Tactic/Linarith/Oracle/FourierMotzkin.lean,Mathlib/Tactic/Linter/GeOrGt.lean,Mathlib/Tactic/Linter/Style.lean,Mathlib/Tactic/NormNum/GCD.lean,Mathlib/Tactic/NormNum/Inv.lean,Mathlib/Tactic/Ring/Basic.lean,Mathlib/Topology/Category/Profinite/Nobeling.lean,Mathlib/Topology/ContinuousFunction/Bounded.lean,Mathlib/Topology/MetricSpace/CauSeqFilter.lean,Mathlib/Topology/MetricSpace/Cauchy.lean,Mathlib/Topology/MetricSpace/Closeds.lean,Mathlib/Topology/Sequences.lean,scripts/lint-style.py,test/Explode.lean,test/GCongr/inequalities.lean,test/GeOrGt.lean,test/LibrarySearch/IsCompact.lean,test/LibrarySearch/basic.lean,test/Recall.lean,test/Rify.lean,test/Use.lean,test/cancel_denoms.lean,test/congr.lean,test/delabLinearIndependent.lean,test/delaborators.lean,test/interval_cases.lean,test/linarith.lean 109 4 ['github-actions', 'grunweg', 'urkud'] nobody
116-4311
3 months ago
737-5305
737 days ago
0-15256
4 hours
24100 eric-wieser
author:eric-wieser
 feat: restore some explicit binders from Lean 3 Part of #24099 --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict awaiting-author tech debt t-topology t-algebra
label:t-algebra$
 39/42 Mathlib/Data/FinEnum.lean,Mathlib/FieldTheory/Galois/Profinite.lean,Mathlib/Topology/Bases.lean,Mathlib/Topology/Compactness/CompactlyGeneratedSpace.lean,Mathlib/Topology/MetricSpace/IsometricSMul.lean,Mathlib/Topology/Metrizable/CompletelyMetrizable.lean,Mathlib/Topology/Metrizable/Uniformity.lean,Mathlib/Topology/Order.lean,Mathlib/Topology/Order/LowerUpperTopology.lean,Mathlib/Topology/UniformSpace/UniformEmbedding.lean 10 3 ['github-actions', 'grunweg', 'leanprover-community-bot-assistant'] nobody
111-376
3 months ago
401-78379
401 days ago
0-954
15 minutes
36911 jjdishere
author:jjdishere
 fix(RingTheory/Valuation): change `ValueGroup` from taking HomClass to Hom This PR refactors `MonoidWithZeroHom.valueMonoid`, `MonoidWithZeroHom.valueGroup`, `MonoidWithZeroHom.ValueGroup₀`, and `MonoidWithZeroHom.ValueGroup₀.embedding` to take a concrete `MonoidWithZeroHom` as input instead of a `MonoidWithZeroHomClass` instance, following rules described in [#mathlib4 > Mathlib's morphism hierarchy @ 💬](https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/Mathlib.27s.20morphism.20hierarchy/near/554383157) As a result, we are able to remove several `erw` and many `set_option backward.isDefEq.respectTransparency false in`. The trade-off (foreseen by the same zulip thread) is that we now need to write an explicit coercion to `MonoidWithZeroHom` in `ValueGroup₀ (Valued.v (R := R) : R →*₀ Γ₀)`. Additionally, this PR fixes an instance on `NNReal`. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) - [x] depends on: #36532 - [ ] depends on: #36777 t-ring-theory tech debt blocked-by-other-PR merge-conflict 559/483 Mathlib/Algebra/GroupWithZero/Range.lean,Mathlib/Data/NNReal/Defs.lean,Mathlib/NumberTheory/NumberField/Completion/FinitePlace.lean,Mathlib/NumberTheory/Padics/Complex.lean,Mathlib/NumberTheory/Padics/HeightOneSpectrum.lean,Mathlib/NumberTheory/Padics/WithVal.lean,Mathlib/NumberTheory/RatFunc/Ostrowski.lean,Mathlib/RingTheory/DedekindDomain/AdicValuation.lean,Mathlib/RingTheory/LaurentSeries.lean,Mathlib/RingTheory/Valuation/Basic.lean,Mathlib/RingTheory/Valuation/Discrete/Basic.lean,Mathlib/RingTheory/Valuation/Discrete/RankOne.lean,Mathlib/RingTheory/Valuation/DiscreteValuativeRel.lean,Mathlib/RingTheory/Valuation/RankOne.lean,Mathlib/RingTheory/Valuation/ValuativeRel/Basic.lean,Mathlib/RingTheory/Valuation/ValuativeRel/Trivial.lean,Mathlib/Topology/Algebra/ValuativeRel/ValuativeTopology.lean,Mathlib/Topology/Algebra/Valued/LocallyCompact.lean,Mathlib/Topology/Algebra/Valued/NormedValued.lean,Mathlib/Topology/Algebra/Valued/ValuationTopology.lean,Mathlib/Topology/Algebra/Valued/ValuativeRel.lean,Mathlib/Topology/Algebra/Valued/ValuedField.lean,Mathlib/Topology/Algebra/Valued/WithVal.lean,Mathlib/Topology/Algebra/Valued/WithZeroMulInt.lean 24 3 ['github-actions', 'mathlib-dependent-issues', 'mathlib-merge-conflicts'] nobody
56-65766
1 month ago
63-11233
63 days ago
0-60
1 minute
39011 Vierkantor
author:Vierkantor
 chore(Algebra/Polynomial/Module): workaround for backward.inferInstanceAs This PR, like #38990, works around a `backward.inferInstanceAs` compatibility flag introduced by identifying `PolynomialModule` with `Finsupp` in our definitions. We introduce a new dsimp lemma `funLike_eq` that transfers the `FunLike` instances, and now we can use `PolynomialModule`'s `FunLike` instance, instead of the custom `CoeFun` instance. This is not a great approach, but it seems the least painful for the short term. The alternative would be to strictly enforce the defeq barrier between `PolynomialModule` and `Finsupp`, which would mean a substantial rewrite of this corner of Mathlib. We can't make `PolynomialModule` an `@[implicit_reducible]`, because we need different multiplication on it than `Finsupp` has. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra tech debt
label:t-algebra$
 8/5 Mathlib/Algebra/Polynomial/Module/Basic.lean 1 1 ['github-actions'] jcommelin
assignee:jcommelin
10-74897
10 days ago
16-17448
16 days ago
16-17160
16 days
38990 Vierkantor
author:Vierkantor
 chore(Algebra/DirectSum): workaround for `backward.inferInstanceAs` This PR works around a `backward.inferInstanceAs` compatibility flag introduced by identifying `DirectSum` with `DFinsupp` in our definitions. We introduce a new dsimp lemma `funLike_eq` that transfers the `FunLike` instances, and now we can use `DirectSum`'s `FunLike` instance, instead of the custom `CoeFun` instance. I unsqueezed a few `simp`s, which all ran pretty much instant on my machine so it shouldn't cause much slowdown. Also we fix two porting notes. This is not a great approach, but it seems the least painful for the short term. The alternative would be to strictly enforce the defeq barrier between `DirectSum` and `DFinsupp`, which would mean a substantial rewrite of this corner of Mathlib. We can't make `DirectSum` an `@[implicit_reducible]`, because we need different multiplication on it than `DFinsupp` has. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra tech debt t-ring-theory awaiting-author
label:t-algebra$
 36/38 Mathlib/Algebra/DirectSum/Basic.lean,Mathlib/Algebra/DirectSum/Internal.lean,Mathlib/Algebra/DirectSum/Ring.lean,Mathlib/Algebra/Lie/DirectSum.lean,Mathlib/Algebra/Order/Module/HahnEmbedding.lean,Mathlib/Analysis/InnerProductSpace/Projection/FiniteDimensional.lean,Mathlib/Analysis/InnerProductSpace/Subspace.lean,Mathlib/RingTheory/MvPolynomial/WeightedHomogeneous.lean,Mathlib/RingTheory/Spectrum/Prime/RingHom.lean 9 3 ['JovanGerb', 'Vierkantor', 'github-actions'] JovanGerb
assignee:JovanGerb
7-35337
7 days ago
8-26746
8 days ago
8-19465
8 days
39386 MichaelStollBayreuth
author:MichaelStollBayreuth
 chore: shake --keep-implied --keep-prefix --fix --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) WIP tech debt large-import merge-conflict 113346/9457 Mathlib/Algebra/AddConstMap/Basic.lean,Mathlib/Algebra/AddConstMap/Equiv.lean,Mathlib/Algebra/AddTorsor/Basic.lean,Mathlib/Algebra/AddTorsor/Defs.lean,Mathlib/Algebra/AffineMonoid/Basic.lean,Mathlib/Algebra/AffineMonoid/Embedding.lean,Mathlib/Algebra/AffineMonoid/Irreducible.lean,Mathlib/Algebra/AffineMonoid/UniqueSums.lean,Mathlib/Algebra/Algebra/Basic.lean,Mathlib/Algebra/Algebra/Bilinear.lean,Mathlib/Algebra/Algebra/Defs.lean,Mathlib/Algebra/Algebra/Epi.lean,Mathlib/Algebra/Algebra/Equiv.lean,Mathlib/Algebra/Algebra/Field.lean,Mathlib/Algebra/Algebra/Hom.lean,Mathlib/Algebra/Algebra/Hom/Rat.lean,Mathlib/Algebra/Algebra/IsSimpleRing.lean,Mathlib/Algebra/Algebra/NonUnitalHom.lean,Mathlib/Algebra/Algebra/NonUnitalSubalgebra.lean,Mathlib/Algebra/Algebra/Operations.lean,Mathlib/Algebra/Algebra/Opposite.lean,Mathlib/Algebra/Algebra/Pi.lean,Mathlib/Algebra/Algebra/Prod.lean,Mathlib/Algebra/Algebra/Rat.lean,Mathlib/Algebra/Algebra/RestrictScalars.lean,Mathlib/Algebra/Algebra/Shrink.lean,Mathlib/Algebra/Algebra/Spectrum/Basic.lean,Mathlib/Algebra/Algebra/Spectrum/Pi.lean,Mathlib/Algebra/Algebra/Spectrum/Quasispectrum.lean,Mathlib/Algebra/Algebra/StrictPositivity.lean,Mathlib/Algebra/Algebra/Subalgebra/Basic.lean,Mathlib/Algebra/Algebra/Subalgebra/Centralizer.lean,Mathlib/Algebra/Algebra/Subalgebra/Directed.lean,Mathlib/Algebra/Algebra/Subalgebra/IsSimpleOrder.lean,Mathlib/Algebra/Algebra/Subalgebra/Lattice.lean,Mathlib/Algebra/Algebra/Subalgebra/Matrix.lean,Mathlib/Algebra/Algebra/Subalgebra/MulOpposite.lean,Mathlib/Algebra/Algebra/Subalgebra/Operations.lean,Mathlib/Algebra/Algebra/Subalgebra/Order.lean,Mathlib/Algebra/Algebra/Subalgebra/Pi.lean,Mathlib/Algebra/Algebra/Subalgebra/Pointwise.lean,Mathlib/Algebra/Algebra/Subalgebra/Prod.lean,Mathlib/Algebra/Algebra/Subalgebra/Rank.lean,Mathlib/Algebra/Algebra/Subalgebra/Tower.lean,Mathlib/Algebra/Algebra/Subalgebra/Unitization.lean,Mathlib/Algebra/Algebra/Tower.lean,Mathlib/Algebra/Algebra/TransferInstance.lean,Mathlib/Algebra/Algebra/Unitization.lean,Mathlib/Algebra/Algebra/ZMod.lean,Mathlib/Algebra/AlgebraicCard.lean,Mathlib/Algebra/Azumaya/Basic.lean,Mathlib/Algebra/Azumaya/Defs.lean,Mathlib/Algebra/Azumaya/Matrix.lean,Mathlib/Algebra/BigOperators/Associated.lean,Mathlib/Algebra/BigOperators/Balance.lean,Mathlib/Algebra/BigOperators/Expect.lean,Mathlib/Algebra/BigOperators/Field.lean,Mathlib/Algebra/BigOperators/Fin.lean,Mathlib/Algebra/BigOperators/Finprod.lean,Mathlib/Algebra/BigOperators/Finsupp/Basic.lean,Mathlib/Algebra/BigOperators/Finsupp/Fin.lean,Mathlib/Algebra/BigOperators/Group/Finset/Basic.lean,Mathlib/Algebra/BigOperators/Group/Finset/Defs.lean,Mathlib/Algebra/BigOperators/Group/Finset/Gaps.lean,Mathlib/Algebra/BigOperators/Group/Finset/Indicator.lean,Mathlib/Algebra/BigOperators/Group/Finset/Interval.lean,Mathlib/Algebra/BigOperators/Group/Finset/Lemmas.lean,Mathlib/Algebra/BigOperators/Group/Finset/Pi.lean,Mathlib/Algebra/BigOperators/Group/Finset/Piecewise.lean,Mathlib/Algebra/BigOperators/Group/Finset/Powerset.lean,Mathlib/Algebra/BigOperators/Group/Finset/Preimage.lean,Mathlib/Algebra/BigOperators/Group/Finset/Sigma.lean,Mathlib/Algebra/BigOperators/Group/List/Basic.lean,Mathlib/Algebra/BigOperators/Group/List/Lemmas.lean,Mathlib/Algebra/BigOperators/Group/Multiset/Basic.lean,Mathlib/Algebra/BigOperators/Group/Multiset/Defs.lean,Mathlib/Algebra/BigOperators/GroupWithZero/Action.lean,Mathlib/Algebra/BigOperators/GroupWithZero/Finset.lean,Mathlib/Algebra/BigOperators/Intervals.lean,Mathlib/Algebra/BigOperators/ModEq.lean,Mathlib/Algebra/BigOperators/Module.lean,Mathlib/Algebra/BigOperators/NatAntidiagonal.lean,Mathlib/Algebra/BigOperators/Option.lean,Mathlib/Algebra/BigOperators/Pi.lean,Mathlib/Algebra/BigOperators/Ring/Finset.lean,Mathlib/Algebra/BigOperators/Ring/List.lean,Mathlib/Algebra/BigOperators/Ring/Multiset.lean,Mathlib/Algebra/BigOperators/Ring/Nat.lean,Mathlib/Algebra/BigOperators/RingEquiv.lean,Mathlib/Algebra/BigOperators/Sym.lean,Mathlib/Algebra/BigOperators/WithTop.lean,Mathlib/Algebra/BrauerGroup/Defs.lean,Mathlib/Algebra/Category/AlgCat/Basic.lean,Mathlib/Algebra/Category/AlgCat/Limits.lean,Mathlib/Algebra/Category/AlgCat/Monoidal.lean,Mathlib/Algebra/Category/AlgCat/Symmetric.lean,Mathlib/Algebra/Category/BialgCat/Basic.lean,Mathlib/Algebra/Category/BialgCat/Monoidal.lean,Mathlib/Algebra/Category/BoolRing.lean,Mathlib/Algebra/Category/CoalgCat/Basic.lean 7976 3 ['MichaelStollBayreuth', 'github-actions', 'mathlib-merge-conflicts'] nobody
7-20283
7 days ago
8-14115
8 days ago
0-2
2 seconds
39479 wwylele
author:wwylele
 chore(RingTheory/HahnSeries): remove a defeq abuse Previously the simp implicitly uses `⟨⟨((↑) : ℕ → Γ),...⟩,...⟩.toFun = (↑)`. This explicitly writes out the intermediate term so the it no longer relies on defeq. Also changed the statement of ofPowerSeries_apply to reuse existing embedding --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-ring-theory tech debt 9/12 Mathlib/RingTheory/HahnSeries/PowerSeries.lean,Mathlib/RingTheory/LaurentSeries.lean 2 1 ['github-actions'] nobody
6-5701
6 days ago
6-5777
6 days ago
6-5597
6 days
39499 MichaelStollBayreuth
author:MichaelStollBayreuth
 chore: run `lake shake` successively from the leaves We do the experiment from #39481 in reverse order: starting from the leaves, run `lake shake --force --only --fix` and then `lake build` until something breaks. Then fix the problems manually and continue. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) WIP tech debt 8057/0 MS_test/topsort.txt 1 2 ['MichaelStollBayreuth', 'github-actions'] nobody
5-41897
5 days ago
5-54656
5 days ago
0-1
1 second
39481 MichaelStollBayreuth
author:MichaelStollBayreuth
 chore: run `lake shake` iteratively and fix problems This adds `-- shake: keep-all` to all modules under `Mathlib.Lean`, `Mathlib.Tactic` and `Mathlib.Util`. Then it goes through the remaining modules in topological order (according to the list in `MS_test/topsort3.txt`) and for each of them, runs `lake shake --force --only --fix`, followed by `lake build `. If there is no error, the changes are commited. Otherwise, the problems are fixed manually; then the changes are committed. This has been done for the first ~400 modules in the list. 38 of them required manual fixes; they are listed in `MS_test/after_shake_fixes.txt`. We note that the import stats bot claims that the number of imports actually *increases* in most files, which somehow runs counter expectations... Discussion: [#mathlib4 > shake without --add-public @ 💬](https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/shake.20without.20--add-public/near/595349216) --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) WIP tech debt large-import merge-conflict 9178/858 MS_test/after_shake_fixes.txt,MS_test/topsort3.txt,Mathlib/Algebra/AddTorsor/Defs.lean,Mathlib/Algebra/BigOperators/Group/List/Basic.lean,Mathlib/Algebra/CharZero/Defs.lean,Mathlib/Algebra/ContinuedFractions/Basic.lean,Mathlib/Algebra/Divisibility/Basic.lean,Mathlib/Algebra/Divisibility/Hom.lean,Mathlib/Algebra/Divisibility/Prod.lean,Mathlib/Algebra/Divisibility/Units.lean,Mathlib/Algebra/EuclideanDomain/Field.lean,Mathlib/Algebra/Expr.lean,Mathlib/Algebra/Field/Defs.lean,Mathlib/Algebra/Field/IsField.lean,Mathlib/Algebra/Free.lean,Mathlib/Algebra/FreeMonoid/Basic.lean,Mathlib/Algebra/FreeMonoid/Count.lean,Mathlib/Algebra/Group/Action/Defs.lean,Mathlib/Algebra/Group/Action/Faithful.lean,Mathlib/Algebra/Group/Action/Option.lean,Mathlib/Algebra/Group/Action/Pretransitive.lean,Mathlib/Algebra/Group/Action/Sum.lean,Mathlib/Algebra/Group/Basic.lean,Mathlib/Algebra/Group/Commute/Basic.lean,Mathlib/Algebra/Group/Commute/Units.lean,Mathlib/Algebra/Group/Defs.lean,Mathlib/Algebra/Group/Equiv/Basic.lean,Mathlib/Algebra/Group/Equiv/Defs.lean,Mathlib/Algebra/Group/Equiv/TypeTags.lean,Mathlib/Algebra/Group/Ext.lean,Mathlib/Algebra/Group/Hom/Basic.lean,Mathlib/Algebra/Group/Hom/Defs.lean,Mathlib/Algebra/Group/Hom/End.lean,Mathlib/Algebra/Group/Hom/Instances.lean,Mathlib/Algebra/Group/Idempotent.lean,Mathlib/Algebra/Group/InjSurj.lean,Mathlib/Algebra/Group/Int/Units.lean,Mathlib/Algebra/Group/Invertible/Basic.lean,Mathlib/Algebra/Group/Invertible/Defs.lean,Mathlib/Algebra/Group/Irreducible/Defs.lean,Mathlib/Algebra/Group/ModEq.lean,Mathlib/Algebra/Group/Nat/Hom.lean,Mathlib/Algebra/Group/Opposite.lean,Mathlib/Algebra/Group/Pi/Basic.lean,Mathlib/Algebra/Group/Pi/Units.lean,Mathlib/Algebra/Group/Prod.lean,Mathlib/Algebra/Group/Semiconj/Basic.lean,Mathlib/Algebra/Group/Semiconj/Defs.lean,Mathlib/Algebra/Group/Semiconj/Units.lean,Mathlib/Algebra/Group/Torsion.lean,Mathlib/Algebra/Group/TypeTags/Basic.lean,Mathlib/Algebra/Group/Units/Basic.lean,Mathlib/Algebra/Group/Units/Defs.lean,Mathlib/Algebra/Group/Units/Hom.lean,Mathlib/Algebra/Group/WithOne/Basic.lean,Mathlib/Algebra/Group/WithOne/Defs.lean,Mathlib/Algebra/GroupWithZero/Action/Defs.lean,Mathlib/Algebra/GroupWithZero/Basic.lean,Mathlib/Algebra/GroupWithZero/Commute.lean,Mathlib/Algebra/GroupWithZero/Defs.lean,Mathlib/Algebra/GroupWithZero/Divisibility.lean,Mathlib/Algebra/GroupWithZero/Hom.lean,Mathlib/Algebra/GroupWithZero/Idempotent.lean,Mathlib/Algebra/GroupWithZero/InjSurj.lean,Mathlib/Algebra/GroupWithZero/Invertible.lean,Mathlib/Algebra/GroupWithZero/NeZero.lean,Mathlib/Algebra/GroupWithZero/Opposite.lean,Mathlib/Algebra/GroupWithZero/Prod.lean,Mathlib/Algebra/GroupWithZero/Regular.lean,Mathlib/Algebra/GroupWithZero/Semiconj.lean,Mathlib/Algebra/GroupWithZero/Units/Basic.lean,Mathlib/Algebra/GroupWithZero/WithZero.lean,Mathlib/Algebra/HierarchyDesign.lean,Mathlib/Algebra/Homology/ComplexShape.lean,Mathlib/Algebra/Homology/Embedding/Basic.lean,Mathlib/Algebra/NeZero.lean,Mathlib/Algebra/Notation.lean,Mathlib/Algebra/Notation/Defs.lean,Mathlib/Algebra/Notation/Lemmas.lean,Mathlib/Algebra/Notation/Pi/Basic.lean,Mathlib/Algebra/Notation/Pi/Defs.lean,Mathlib/Algebra/Notation/Prod.lean,Mathlib/Algebra/Opposites.lean,Mathlib/Algebra/Order/GroupWithZero/Unbundled/Defs.lean,Mathlib/Algebra/Order/Monoid/Unbundled/Defs.lean,Mathlib/Algebra/Prime/Defs.lean,Mathlib/Algebra/Quotient.lean,Mathlib/Algebra/Regular/Basic.lean,Mathlib/Algebra/Regular/Defs.lean,Mathlib/Algebra/Ring/Basic.lean,Mathlib/Algebra/Ring/Defs.lean,Mathlib/Algebra/Ring/Ext.lean,Mathlib/Algebra/Ring/GrindInstances.lean,Mathlib/Algebra/Ring/Hom/Defs.lean,Mathlib/Algebra/Ring/Hom/InjSurj.lean,Mathlib/Algebra/Ring/Idempotent.lean,Mathlib/Algebra/Ring/InjSurj.lean,Mathlib/Algebra/Ring/Int/Defs.lean,Mathlib/Algebra/Ring/Invertible.lean,Mathlib/Algebra/Ring/MinimalAxioms.lean 690 2 ['github-actions', 'mathlib-merge-conflicts'] nobody
4-80426
4 days ago
unknown
0-0
0 seconds
38957 wwylele
author:wwylele
 chore(GroupTheory/DivisibleHull): remove `backward.privateInPublic` --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) tech debt t-group-theory awaiting-zulip 5/12 Mathlib/GroupTheory/DivisibleHull.lean 1 11 ['Komyyy', 'github-actions', 'grunweg', 'jcommelin', 'wwylele'] jcommelin
assignee:jcommelin
3-36054
3 days ago
3-36054
3 days ago
13-78350
13 days
39477 wwylele
author:wwylele
 chore(LinearAlgebra/Ray): remove a defeq abuse Previously, the code uses Subtype constructor to construct RayVector, and the instance cannot see through this. As a common practice, RayVector declares its own constructor to resolve this --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra tech debt maintainer-merge
label:t-algebra$
 16/5 Mathlib/LinearAlgebra/Ray.lean 1 9 ['Vierkantor', 'github-actions', 'j-loreaux', 'robin-carlier', 'wwylele'] nobody
2-79132
2 days ago
2-79201
2 days ago
5-48255
5 days
36635 Vierkantor
author:Vierkantor
 chore(*): turn comments before declarations into docstrings This PR goes through the whole of Mathlib and replaces `/- comments -/` with `/-- docstrings -/` or `/-! module docs -/` whenever they appear before a declaration. A lot of these appear to be simple typos, where a docstring was actually intended. Where a comment was originally intended, I would argue it is still a good idea include the comments in the generated documentation, or at least it does not hurt anyone. These instances were found by a linter, in an upcoming PR: #36636. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) tech debt merge-conflict 253/260 Mathlib/Algebra/Algebra/Subalgebra/Basic.lean,Mathlib/Algebra/Category/ModuleCat/Abelian.lean,Mathlib/Algebra/Category/ModuleCat/Semi.lean,Mathlib/Algebra/DirectSum/Internal.lean,Mathlib/Algebra/Group/Defs.lean,Mathlib/Algebra/Group/Subgroup/MulOppositeLemmas.lean,Mathlib/Algebra/Group/Submonoid/Basic.lean,Mathlib/Algebra/Group/Submonoid/Membership.lean,Mathlib/Algebra/Group/Subsemigroup/Basic.lean,Mathlib/Algebra/GroupWithZero/Range.lean,Mathlib/Algebra/Order/Group/Unbundled/Basic.lean,Mathlib/Algebra/Order/GroupWithZero/Unbundled/Defs.lean,Mathlib/Algebra/Order/Monoid/Unbundled/Defs.lean,Mathlib/Algebra/Order/Ring/Star.lean,Mathlib/Algebra/Order/Sub/Defs.lean,Mathlib/Algebra/Polynomial/CoeffList.lean,Mathlib/Algebra/Ring/Ext.lean,Mathlib/Algebra/SkewMonoidAlgebra/Basic.lean,Mathlib/Algebra/Star/SelfAdjoint.lean,Mathlib/AlgebraicGeometry/Morphisms/RingHomProperties.lean,Mathlib/AlgebraicGeometry/Morphisms/WeaklyEtale.lean,Mathlib/Analysis/Analytic/Constructions.lean,Mathlib/Analysis/CStarAlgebra/Module/Constructions.lean,Mathlib/Analysis/CStarAlgebra/Module/Synonym.lean,Mathlib/Analysis/Calculus/ContDiff/FaaDiBruno.lean,Mathlib/Analysis/Complex/UpperHalfPlane/MoebiusAction.lean,Mathlib/Analysis/Convex/Function.lean,Mathlib/Analysis/Distribution/SchwartzSpace/Fourier.lean,Mathlib/Analysis/Distribution/TemperedDistribution.lean,Mathlib/Analysis/Fourier/Convolution.lean,Mathlib/Analysis/InnerProductSpace/Adjoint.lean,Mathlib/Analysis/InnerProductSpace/Orthogonal.lean,Mathlib/Analysis/InnerProductSpace/TensorProduct.lean,Mathlib/Analysis/LConvolution.lean,Mathlib/Analysis/LocallyConvex/WeakDual.lean,Mathlib/Analysis/Meromorphic/Basic.lean,Mathlib/Analysis/Normed/Algebra/GelfandMazur.lean,Mathlib/Analysis/Normed/Algebra/Unitization.lean,Mathlib/Analysis/Normed/Module/FiniteDimension.lean,Mathlib/Analysis/Normed/Module/MStructure.lean,Mathlib/Analysis/Normed/Operator/Banach.lean,Mathlib/Analysis/Normed/Operator/ContinuousAlgEquiv.lean,Mathlib/Analysis/RCLike/Basic.lean,Mathlib/Analysis/SpecialFunctions/Complex/Circle.lean,Mathlib/Analysis/SpecialFunctions/Trigonometric/Cotangent.lean,Mathlib/CategoryTheory/Action/Concrete.lean,Mathlib/CategoryTheory/Equivalence.lean,Mathlib/CategoryTheory/FintypeCat.lean,Mathlib/CategoryTheory/Iso.lean,Mathlib/CategoryTheory/Limits/Cones.lean,Mathlib/CategoryTheory/Limits/FintypeCat.lean,Mathlib/CategoryTheory/Limits/Shapes/BinaryBiproducts.lean,Mathlib/CategoryTheory/Limits/Shapes/Biproducts.lean,Mathlib/CategoryTheory/Monoidal/Closed/Ideal.lean,Mathlib/CategoryTheory/Products/Basic.lean,Mathlib/Combinatorics/Hindman.lean,Mathlib/Combinatorics/SimpleGraph/Hall.lean,Mathlib/Combinatorics/SimpleGraph/Walks/Counting.lean,Mathlib/Data/Complex/Basic.lean,Mathlib/Data/ENNReal/Holder.lean,Mathlib/Data/Finset/Sym.lean,Mathlib/Data/Fintype/Sets.lean,Mathlib/Data/Nat/Multiplicity.lean,Mathlib/Data/Set/Pointwise/Support.lean,Mathlib/Data/Set/Semiring.lean,Mathlib/Data/Sign/Defs.lean,Mathlib/FieldTheory/RatFunc/AsPolynomial.lean,Mathlib/Geometry/Euclidean/Volume/Measure.lean,Mathlib/GroupTheory/Coset/Defs.lean,Mathlib/GroupTheory/FreeGroup/IsFreeGroup.lean,Mathlib/GroupTheory/GroupAction/MultipleTransitivity.lean,Mathlib/GroupTheory/GroupAction/SubMulAction.lean,Mathlib/GroupTheory/OrderOfElement.lean,Mathlib/GroupTheory/OreLocalization/Basic.lean,Mathlib/GroupTheory/QuotientGroup/Defs.lean,Mathlib/GroupTheory/SpecificGroups/Alternating/MaximalSubgroups.lean,Mathlib/LinearAlgebra/CliffordAlgebra/SpinGroup.lean,Mathlib/LinearAlgebra/Complex/Module.lean,Mathlib/LinearAlgebra/DFinsupp.lean,Mathlib/LinearAlgebra/Isomorphisms.lean,Mathlib/LinearAlgebra/LinearIndependent/Lemmas.lean,Mathlib/LinearAlgebra/PiTensorProduct.lean,Mathlib/Logic/Basic.lean,Mathlib/Logic/UnivLE.lean,Mathlib/MeasureTheory/Constructions/BorelSpace/Basic.lean,Mathlib/MeasureTheory/Function/ConditionalLExpectation.lean,Mathlib/MeasureTheory/Function/JacobianOneDim.lean,Mathlib/MeasureTheory/Function/UniformIntegrable.lean,Mathlib/MeasureTheory/Group/Measure.lean,Mathlib/MeasureTheory/Integral/Lebesgue/Add.lean,Mathlib/MeasureTheory/MeasurableSpace/Constructions.lean,Mathlib/MeasureTheory/Measure/Haar/NormedSpace.lean,Mathlib/MeasureTheory/Measure/Haar/OfBasis.lean,Mathlib/MeasureTheory/Measure/ProbabilityMeasure.lean,Mathlib/ModelTheory/Algebra/Field/CharP.lean,Mathlib/NumberTheory/Chebyshev.lean,Mathlib/NumberTheory/NumberField/Cyclotomic/Basic.lean,Mathlib/Order/BooleanAlgebra/Basic.lean,Mathlib/Order/BourbakiWitt.lean,Mathlib/Order/CompleteLattice/Basic.lean 139 19 ['JovanGerb', 'Vierkantor', 'github-actions', 'grunweg', 'mathlib-merge-conflicts'] nobody
0-3948
1 hour ago
59-30717
59 days ago
2-9741
2 days
39602 b-mehta
author:b-mehta
 chore(Mathlib/Tactic): stop norm_num importing the Bochner integral Motivation: importing `Mathlib.Tactic.NormNum` shouldn't require use to build the Bochner integral and fundamental theorem of algebra. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) tech debt 36/22 Mathlib.lean,Mathlib/Analysis/SpecialFunctions/Complex/CircleAddChar.lean,Mathlib/NumberTheory/LegendreSymbol/AddCharacter.lean,Mathlib/NumberTheory/LegendreSymbol/Cyclotomic.lean 4 13 ['adomani', 'b-mehta', 'github-actions', 'grunweg', 'leanprover-radar'] grunweg
assignee:grunweg
0-1981
33 minutes ago
0-75133
20 hours ago
1-43459
1 day

PRs blocked on a zulip discussion

Number Author Title Description Labels +/- Modified files (first 100) 📝 💬 All users who commented or reviewed Assignee(s) Updated Last status change total time in review
17623 FR-vdash-bot
author:FR-vdash-bot
 feat(Algebra/Order/GroupWithZero/Unbundled): add some lemmas Some lemmas in `Algebra.Order.GroupWithZero.Unbundled` have incorrect or unsatisfactory names, or assumptions that can be omitted using `ZeroLEOneClass`. The lemmas added in this PR are versions of existing lemmas that use the correct or better name or `ZeroLEOneClass` to omit an assumption. The original lemmas will be deprecated in #17593. | New name | Old name | |-------------------------|-------------------------| | `mul_le_one_left₀` | `Left.mul_le_one_of_le_of_le` | | `mul_lt_one_of_le_of_lt_left₀` (`0 ≤ ·` version) / `mul_lt_one_of_le_of_lt_of_pos_left` | `Left.mul_lt_of_le_of_lt_one_of_pos` | | `mul_lt_one_of_lt_of_le_left₀` | `Left.mul_lt_of_lt_of_le_one_of_nonneg` | | `mul_le_one_right₀` | `Right.mul_le_one_of_le_of_le` | | `mul_lt_one_of_lt_of_le_right₀` (`0 ≤ ·` version) / `mul_lt_one_of_lt_of_le_of_pos_right` | `Right.mul_lt_one_of_lt_of_le_of_pos` | | `mul_lt_one_of_le_of_lt_right₀` | `Right.mul_lt_one_of_le_of_lt_of_nonneg` | The following lemmas use `ZeroLEOneClass`. | New name | Old name | |-------------------------|-------------------------| | `(Left.)one_le_mul₀` | `Left.one_le_mul_of_le_of_le` | | `Left.one_lt_mul_of_le_of_lt₀` | `Left.one_lt_mul_of_le_of_lt_of_pos` | | `Left.one_lt_mul_of_lt_of_le₀` | `Left.lt_mul_of_lt_of_one_le_of_nonneg` / `one_lt_mul_of_lt_of_le` (still there) | | `(Left.)one_lt_mul₀` | | | `Right.one_le_mul₀` | `Right.one_le_mul_of_le_of_le` | | `Right.one_lt_mul_of_lt_of_le₀` | `Right.one_lt_mul_of_lt_of_le_of_pos` | | `Right.one_lt_mul_of_le_of_lt₀` | `Right.one_lt_mul_of_le_of_lt_of_nonneg` / `one_lt_mul_of_le_of_lt` (still there) / `one_lt_mul` (still there) | | `Right.one_lt_mul₀` | `Right.one_lt_mul_of_lt_of_lt` | --- Split from #17593. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-algebra awaiting-zulip t-order
label:t-algebra$
 146/44 Mathlib/Algebra/Order/GroupWithZero/Canonical.lean,Mathlib/Algebra/Order/GroupWithZero/Unbundled.lean 2 11 ['YaelDillies', 'astrainfinita', 'github-actions', 'j-loreaux'] nobody
548-35171
1 year ago
555-27730
555 days ago
33-64877
33 days
15654 TpmKranz
author:TpmKranz
 feat(Computability): language-preserving maps between NFA and RE Map REs to NFAs via Thompson's construction and NFAs to REs using GNFAs Last chunk of #12648 --- - [ ] depends on: #15651 - [ ] depends on: #15649 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) blocked-by-other-PR new-contributor t-computability merge-conflict awaiting-zulip 985/2 Mathlib.lean,Mathlib/Computability/GNFA.lean,Mathlib/Computability/Language.lean,Mathlib/Computability/NFA.lean,Mathlib/Computability/RegularExpressions.lean,Mathlib/Data/FinEnum/Option.lean,docs/references.bib 7 3 ['github-actions', 'leanprover-community-mathlib4-bot', 'meithecatte'] nobody
381-84848
1 year ago
651-21633
651 days ago
0-179
2 minutes
17458 urkud
author:urkud
 refactor(Algebra/Group): make `IsUnit` a typeclass Also change some lemmas to assume `[IsUnit _]` instead of `[Invertible _]`. Motivated by potential non-defeq diamonds in #14986, see also [Zulip](https://leanprover.zulipchat.com/#narrow/stream/116395-maths/topic/Invertible.20and.20data) I no longer plan to merge this PR, but I'm going to cherry-pick some changes to a new PR before closing this one. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-algebra awaiting-zulip
label:t-algebra$
 82/72 Mathlib/Algebra/CharP/Invertible.lean,Mathlib/Algebra/Group/Invertible/Basic.lean,Mathlib/Algebra/Group/Units/Defs.lean,Mathlib/Algebra/GroupWithZero/Invertible.lean,Mathlib/Algebra/GroupWithZero/Units/Basic.lean,Mathlib/Algebra/Polynomial/Degree/Units.lean,Mathlib/Algebra/Polynomial/Splits.lean,Mathlib/Analysis/Convex/Segment.lean,Mathlib/Analysis/Normed/Affine/Isometry.lean,Mathlib/Analysis/Normed/Ring/Units.lean,Mathlib/CategoryTheory/Linear/Basic.lean,Mathlib/FieldTheory/Finite/Basic.lean,Mathlib/FieldTheory/Separable.lean,Mathlib/FieldTheory/SeparableDegree.lean,Mathlib/GroupTheory/Submonoid/Inverses.lean,Mathlib/LinearAlgebra/AffineSpace/AffineEquiv.lean,Mathlib/LinearAlgebra/AffineSpace/Combination.lean,Mathlib/LinearAlgebra/CliffordAlgebra/Contraction.lean,Mathlib/LinearAlgebra/CliffordAlgebra/Inversion.lean,Mathlib/LinearAlgebra/CliffordAlgebra/SpinGroup.lean,Mathlib/LinearAlgebra/Eigenspace/Minpoly.lean,Mathlib/NumberTheory/MulChar/Basic.lean,Mathlib/RingTheory/Localization/NumDen.lean,Mathlib/RingTheory/Polynomial/Content.lean,Mathlib/RingTheory/Polynomial/GaussLemma.lean,Mathlib/RingTheory/Valuation/Basic.lean 26 12 ['MichaelStollBayreuth', 'acmepjz', 'eric-wieser', 'github-actions', 'leanprover-bot', 'leanprover-community-bot-assistant', 'urkud'] nobody
321-65197
10 months ago
593-12840
593 days ago
0-66650
18 hours
25218 kckennylau
author:kckennylau
 feat(AlgebraicGeometry): Tate normal form of elliptic curves --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-algebraic-geometry awaiting-zulip new-contributor 291/26 Mathlib.lean,Mathlib/AlgebraicGeometry/EllipticCurve/IsomOfJ.lean,Mathlib/AlgebraicGeometry/EllipticCurve/Modular/TateNormalForm.lean,Mathlib/AlgebraicGeometry/EllipticCurve/NormalForms.lean,Mathlib/AlgebraicGeometry/EllipticCurve/VariableChange.lean 5 31 ['MichaelStollBayreuth', 'Multramate', 'acmepjz', 'github-actions', 'grunweg', 'kckennylau', 'leanprover-community-bot-assistant'] nobody
321-64035
10 months ago
354-39152
354 days ago
6-47693
6 days
28803 astrainfinita
author:astrainfinita
 refactor: unbundle algebra from `ENormed*` Further speed up the search in the algebraic typeclass hierarchy by avoiding searching for `TopologicalSpace`. This PR continues the work from #23961. - Change `ESeminormed(Add)Monoid` and `ENormed(Add)Monoid` so they no longer carry algebraic data. - Deprecate `ESeminormed(Add)CommMonoid` and `ENormed(Add)CommMonoid` in favor of `ESeminormed(Add)Monoid` and `ENormed(Add)Monoid` with a commutative algebraic typeclass. |Old|New| |---|---| | `[ESeminormed(Add)(Comm)Monoid E]` | `[(Add)(Comm)Monoid E] [ESeminormed(Add)Monoid E]` | | `[ENormed(Add)(Comm)Monoid]` | `[(Add)(Comm)Monoid E] [ENormed(Add)Monoid]` | See [Zulip discussion](https://leanprover.zulipchat.com/#narrow/channel/144837-PR-reviews/topic/.2328803.20refactor.3A.20unbundle.20algebra.20from.20.60ENormed*.60/with/536024350) ------------ - [x] depends on: #28813 t-algebra merge-conflict slow-typeclass-synthesis awaiting-zulip t-analysis
label:t-algebra$
 80/63 Mathlib/Analysis/CStarAlgebra/CStarMatrix.lean,Mathlib/Analysis/Normed/Group/Basic.lean,Mathlib/Analysis/Normed/Group/Continuity.lean,Mathlib/Analysis/Normed/Group/InfiniteSum.lean,Mathlib/Analysis/NormedSpace/IndicatorFunction.lean,Mathlib/MeasureTheory/Function/L1Space/AEEqFun.lean,Mathlib/MeasureTheory/Function/L1Space/HasFiniteIntegral.lean,Mathlib/MeasureTheory/Function/L1Space/Integrable.lean,Mathlib/MeasureTheory/Function/LocallyIntegrable.lean,Mathlib/MeasureTheory/Function/LpSeminorm/Basic.lean,Mathlib/MeasureTheory/Function/LpSeminorm/CompareExp.lean,Mathlib/MeasureTheory/Function/LpSeminorm/TriangleInequality.lean,Mathlib/MeasureTheory/Integral/IntegrableOn.lean,Mathlib/MeasureTheory/Integral/IntervalIntegral/Basic.lean 14 28 ['astrainfinita', 'bryangingechen', 'github-actions', 'grunweg', 'kbuzzard', 'leanprover-bot', 'leanprover-community-mathlib4-bot', 'mathlib-bors', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot', 'sgouezel'] grunweg
assignee:grunweg
261-79680
8 months ago
270-30834
270 days ago
0-20585
5 hours
28925 grunweg
author:grunweg
 chore: remove `linear_combination'` tactic When `linear_combination` was refactored in #15899, the old code was kept as the `linear_combination'` tactic, for easier migration. The consensus of the zulip discussion ([#mathlib4 > Narrowing the scope of `linear_combination` @ 💬](https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/Narrowing.20the.20scope.20of.20.60linear_combination.60/near/470237816)) was to wait, and "revisit this once people have experienced the various tactics in practice". One year later, the old tactic has almost no uses: it is unused in mathlib; [searching on github](https://github.com/search?q=linear_combination%27%20path%3A*.lean&type=code) yields 37 hits --- all of which are in various forks of mathlib. Thus, removing this tactic seems appropriate. --- Do not merge before the zulip discussion has concluded! [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict file-removed awaiting-zulip 0/564 Mathlib.lean,Mathlib/Tactic.lean,Mathlib/Tactic/LinearCombination'.lean,Mathlib/Tactic/Linter/UnusedTactic.lean,MathlibTest/linear_combination'.lean 5 4 ['euprunin', 'github-actions', 'grunweg', 'mathlib4-merge-conflict-bot'] nobody
218-56890
7 months ago
270-2287
270 days ago
0-1
1 second
30150 imbrem
author:imbrem
 feat(CategoryTheory/Monoidal): to_additive for MonoidalCategory Add `AddMonoidalCategory`, the additive version of `MonoidalCategory`. To get this to work, I needed to _remove_ the `to_additive` attributes in `Discrete.lean`, since existing code relies on the `AddMonoid M → MonoidalCategory M` instance. For now, we simply implement the additive variants by hand instead. --- As discussed in #28718; I added an `AddMonoidalCategory` struct and tagged `MonoidalCategory` with `to_additive`, along with the lemmas in `Category.lean`. I think this is the right approach, since under this framework the "correct" additive version of `Discrete.lean` would be mapping an `AddMonoid` to an `AddMonoidalCategory`. Next steps would be to: - Make `monoidal_coherence` and `coherence` support `AddMonoidalCategory` - Add `CocartesianMonoidalCategory` extending `AddMonoidalCategory` [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-category-theory large-import new-contributor merge-conflict awaiting-zulip t-meta 444/125 Mathlib/CategoryTheory/Monoidal/Category.lean,Mathlib/CategoryTheory/Monoidal/Discrete.lean,Mathlib/Tactic/ToAdditive/GuessName.lean 3 22 ['JovanGerb', 'YaelDillies', 'github-actions', 'imbrem', 'mathlib4-merge-conflict-bot'] nobody
190-67764
6 months ago
230-46430
230 days ago
1-160
1 day
15651 TpmKranz
author:TpmKranz
 feat(Computability/NFA): operations for Thompson's construction Lays the groundwork for a proof of equivalence of RE and NFA, w.r.t. described language. Actual connection to REs comes later, after the groundwork for the opposite direction has been laid. Third chunk of #12648 --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor t-computability merge-conflict awaiting-author awaiting-zulip 307/5 Mathlib/Computability/NFA.lean 1 27 ['TpmKranz', 'YaelDillies', 'dupuisf', 'github-actions', 'leanprover-community-bot-assistant', 'meithecatte', 'rudynicolop'] nobody
185-84896
6 months ago
605-25884
605 days ago
45-84611
45 days
15649 TpmKranz
author:TpmKranz
 feat(Computability): introduce Generalised NFA as bridge to Regular Expression Lays the groundwork for a proof of equivalence of NFA and RE, w.r.t. described language. Actual connection to NFA comes later, after the groundwork for the opposite direction has been laid. Second chunk of #12648 --- - [x] depends on: #15647 [Data.FinEnum.Option unchanged since then] [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor t-computability merge-conflict awaiting-author awaiting-zulip 298/0 Mathlib.lean,Mathlib/Computability/GNFA.lean,Mathlib/Computability/Language.lean,Mathlib/Computability/RegularExpressions.lean,docs/references.bib 5 7 ['github-actions', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot', 'meithecatte', 'trivial1711'] nobody
185-14737
6 months ago
530-64667
530 days ago
23-54870
23 days
20648 anthonyde
author:anthonyde
 feat: formalize regular expression -> εNFA The file `Computability/RegularExpressionsToEpsilonNFA.lean` contains a formal definition of Thompson's method for constructing an `εNFA` from a `RegularExpression` and a proof of its correctness. --- - [x] depends on: #20644 - [x] depends on: #20645 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-computability awaiting-zulip new-contributor 490/0 Mathlib.lean,Mathlib/Computability/RegularExpressionsToEpsilonNFA.lean,docs/references.bib 3 7 ['anthonyde', 'github-actions', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot', 'meithecatte', 'qawbecrdtey'] nobody
184-51905
6 months ago
381-84834
381 days ago
75-77754
75 days
11800 JADekker
author:JADekker
 feat: KappaLindelöf spaces Define KappaLindelöf spaces by following the first one-third of the API for Lindelöf spaces. The remainder will be added in a future PR. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) please-adopt merge-conflict t-topology awaiting-zulip 301/2 Mathlib.lean,Mathlib/Topology/Compactness/KappaLindelof.lean,Mathlib/Topology/Compactness/Lindelof.lean 3 38 ['ADedecker', 'JADekker', 'PatrickMassot', 'StevenClontz', 'adomani', 'github-actions', 'grunweg', 'kim-em', 'urkud'] nobody
184-23771
6 months ago
659-44053
659 days ago
123-25636
123 days
30668 astrainfinita
author:astrainfinita
 feat: `QuotType` This typeclass is primarily for use by type synonyms of `Quot` and `Quotient`. Using `QuotType` API for type synonyms of `Quot` and `Quotient` will avoid defeq abuse caused by directly using `Quot` and `Quotient` APIs. This PR also adds some typeclasses to support different ways to find the quotient map that should be used. See the documentation comments of these typeclasses for examples of usage. --- It's not a typical design to use these auxiliary typeclasses and term elaborators, but I haven't found a better way to support these notations. Some of the naming may need to be discussed. For example: - `⟦·⟧` is currently called `mkQ` in names. This distinguishes it from other `.mk`s and makes it possible to write the quotient map as `mkQ` `mkQ'` ~~`mkQ_ h`~~. But this will also require changing the old lemma names. - It would be helpful if the names of new type classes explained their functionality better. [Zulip](https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/migrate.20to.20.60QuotLike.60.20API) This PR continues the work from #16421. Original PR: https://github.com/leanprover-community/mathlib4/pull/16421 RFC t-data awaiting-zulip awaiting-author 629/0 Mathlib.lean,Mathlib/Data/QuotType.lean,MathlibTest/QuotType.lean 3 22 ['SnirBroshi', 'YaelDillies', 'astrainfinita', 'dagurtomas', 'github-actions', 'mathlib4-merge-conflict-bot', 'plp127', 'vihdzp'] nobody
163-5617
5 months ago
215-60870
215 days ago
0-81
1 minute
33368 urkud
author:urkud
 feat: define `Complex.UnitDisc.shift` Also review the existing API UPD: I'm going to define a `PSL(2, Real)` action instead. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-analysis awaiting-zulip merge-conflict 273/39 Mathlib.lean,Mathlib/Analysis/Complex/UnitDisc/Basic.lean,Mathlib/Analysis/Complex/UnitDisc/Shift.lean 3 7 ['github-actions', 'j-loreaux', 'mathlib4-merge-conflict-bot', 'sgouezel', 'urkud'] j-loreaux
assignee:j-loreaux
135-60330
4 months ago
136-20663
136 days ago
7-10690
7 days
33031 chiyunhsu
author:chiyunhsu
 feat(Combinatorics/Enumerative/Partition): add combinatorial proof of Euler's partition theorem The new file EulerComb.lean contains the combinatorial proof of Euler's partition theorem. The analytic proof of the theorem and its generalization of Glaisher's Theorem has already been formalized in [Glaisher.lean](https://github.com/leanprover-community/mathlib4/blob/master/Mathlib/Combinatorics/Enumerative/Partition/Glaisher.lean). The generalization of the combinatorial proof from this file to Glaisher's Theorem is within reach. --- Zulip discussion: [#mathlib4 > Glaisher’s Bijection on integer partitions](https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/Glaisher.E2.80.99s.20Bijection.20on.20integer.20partitions/with/570808111) [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-combinatorics new-contributor awaiting-zulip awaiting-author 531/0 Mathlib.lean,Mathlib/Combinatorics/Enumerative/Partition/EulerComb.lean 2 7 ['chiyunhsu', 'dagurtomas', 'github-actions', 'tb65536', 'vihdzp'] b-mehta
assignee:b-mehta
113-27583
3 months ago
113-27583
113 days ago
42-21618
42 days
32742 LTolDe
author:LTolDe
 feat(MeasureTheory/Constructions/Polish/Basic): add class SuslinSpace add new class `SuslinSpace` for a topological space that is an analytic set in itself This will be useful to prove the **Effros Theorem**, see [zulip thread](https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/Effros.20Theorem/with/558712441). --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor awaiting-zulip t-measure-probability awaiting-author 4/0 Mathlib/MeasureTheory/Constructions/Polish/Basic.lean 1 10 ['ADedecker', 'LTolDe', 'dagurtomas', 'dupuisf', 'github-actions', 'jcommelin'] PatrickMassot
assignee:PatrickMassot
110-39993
3 months ago
136-24125
136 days ago
25-76907
25 days
26299 adomani
author:adomani
 perf: the `whitespace` linter only acts on modified files Introduces an `IO.Ref` to allow the `commandStart` linter to only run on files that git considers modified with respect to `master`. The linter is also active on files that have had some error, as these are likely being modified! The PR should also mitigate the speed-up that the linter introduced: [#mathlib4 > A whitespace linter @ 💬](https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/A.20whitespace.20linter/near/525091877) Assuming that this goes well, a similar mechanism could be applied to several linters that do not need to run on all code, just on the modified code. Implementation detail: the linter is currently either on or off in "whole" files. It may be also a future development to make this more granular and only run the linter on "modifed commands in modified files", but this is not currently the plan for this modification! --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-linter awaiting-zulip awaiting-author 55/7 Mathlib/Tactic/Linter/Whitespace.lean 1 20 ['adomani', 'eric-wieser', 'github-actions', 'grunweg', 'joneugster', 'kim-em', 'leanprover-bot', 'leanprover-radar', 'mathlib-bors', 'mathlib4-merge-conflict-bot'] grunweg
assignee:grunweg
93-50767
3 months ago
266-47085
266 days ago
66-73556
66 days
35524 grunweg
author:grunweg
 feat: text-based linter against \t followed by tactic mode Wait for the zulip discussion to converge. **If** there is consensus in favour of this change, summarise the motivation here. [zulip discuss](https://leanprover.zulipchat.com/#narrow/channel/345428-mathlib-reviewers/topic/proposal.3A.20no.20more.20use.20of.20.60.E2.96.B8.60.20in.20Mathlib.3F/with/574680826) --- There are currently 80 remaining exceptions in mathlib: ideally, these would get fixed before merging this. Works best when combined with #35523. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-linter awaiting-zulip merge-conflict 23/2 Mathlib/Tactic/Linter/TextBased.lean 1 5 ['github-actions', 'grunweg', 'joneugster', 'mathlib-merge-conflicts', 'vihdzp'] nobody
91-21386
3 months ago
92-44158
92 days ago
0-3308
55 minutes
35578 Shreyas4991
author:Shreyas4991
 fix: writer monad should use an additive logging type The Writer monad's w type is supposed to be additive, not multiplicative. This is how it is conceptually used in Haskell (as a logging type). Haskell uses `Monoid` because it doesn't make a distinction between `AddMonoid` and `Monoid`. [#mathlib4 > Writer should use an additive monoid @ 💬](https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/Writer.20should.20use.20an.20additive.20monoid/near/574990415) --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-data awaiting-zulip merge-conflict 10/10 Mathlib/Control/Monad/Cont.lean,Mathlib/Control/Monad/Writer.lean 2 5 ['Shreyas4991', 'eric-wieser', 'github-actions', 'mathlib-merge-conflicts'] nobody
90-86300
3 months ago
90-86301
90 days ago
0-18707
5 hours
20238 maemre
author:maemre
 feat(Computability/DFA): Closure of regular languages under some set operations This shows that regular languages are closed under complement and intersection by constructing DFAs for them. --- Closure under all other operations will be proved when someone adds the proof for DFA<->regular expression equivalence, so they are not part of this PR. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor t-computability merge-conflict awaiting-author awaiting-zulip 159/0 Mathlib/Computability/DFA.lean,Mathlib/Computability/Language.lean 2 60 ['EtienneC30', 'YaelDillies', 'github-actions', 'maemre', 'mathlib4-merge-conflict-bot', 'meithecatte', 'urkud'] nobody
85-45139
2 months ago
431-23078
431 days ago
48-67492
48 days
22361 rudynicolop
author:rudynicolop
 feat(Computability/NFA): nfa closure properties Add the closure properties union, intersection and reversal for NFA. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor t-computability merge-conflict awaiting-author awaiting-zulip 218/2 Mathlib/Computability/Language.lean,Mathlib/Computability/NFA.lean 2 91 ['EtienneC30', 'b-mehta', 'ctchou', 'github-actions', 'leanprover-community-bot-assistant', 'meithecatte', 'rudynicolop'] nobody
85-45123
2 months ago
382-27017
382 days ago
39-60525
39 days
23929 meithecatte
author:meithecatte
 feat(Computability/NFA): improve bound on pumping lemma --- - [x] depends on: #25321 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-computability awaiting-zulip new-contributor awaiting-author 101/10 Mathlib/Computability/EpsilonNFA.lean,Mathlib/Computability/NFA.lean 2 42 ['YaelDillies', 'dagurtomas', 'github-actions', 'leanprover-community-bot-assistant', 'mathlib4-dependent-issues-bot', 'meithecatte'] nobody
84-65152
2 months ago
349-8051
349 days ago
34-10092
34 days
34963 Parcly-Taxel
author:Parcly-Taxel
 feat(Archive): proof of the Robbins conjecture Cf. [#mathlib4 > Alternative axiomatization of boolean algebras @ 💬](https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/Alternative.20axiomatization.20of.20boolean.20algebras/near/558900960) and #31924. t-algebra awaiting-zulip
label:t-algebra$
 610/0 Archive.lean,Archive/Robbins.lean 2 2 ['chrisflav', 'github-actions'] chrisflav
assignee:chrisflav
83-17193
2 months ago
32-17168
32 days ago
71-52253
71 days
30750 SnirBroshi
author:SnirBroshi
 feat(Data/Quot): `toSet` and `equivClassOf` Define `toSet` which gets the set corresponding to an element of a quotient, and `equivClassOf` which gets the equivalence class of an element under a quotient. --- I found these definitions helpful when working with quotients, specifically `ConnectedComponents` of a `TopologicalSpace`. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-data awaiting-author awaiting-zulip 162/0 Mathlib/Data/Quot.lean,Mathlib/Data/Set/Image.lean,Mathlib/Data/SetLike/Basic.lean,Mathlib/Data/Setoid/Basic.lean 4 8 ['SnirBroshi', 'TwoFX', 'eric-wieser', 'github-actions', 'linesthatinterlace', 'mathlib-merge-conflicts'] TwoFX
assignee:TwoFX
80-47353
2 months ago
176-50693
176 days ago
36-69524
36 days
36890 vihdzp
author:vihdzp
 chore(SetTheory): `le_mul_left` → `le_mul_of_pos_left` The new theorem names/statements match [`Nat.le_mul_of_pos_left`](https://leanprover-community.github.io/mathlib4_docs/Init/Data/Nat/Lemmas.html#Nat.le_mul_of_pos_left). The cardinal one has also been moved to an earlier file. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-set-theory awaiting-zulip merge-conflict 28/23 Mathlib/SetTheory/Cardinal/Arithmetic.lean,Mathlib/SetTheory/Cardinal/Basic.lean,Mathlib/SetTheory/Cardinal/Free.lean,Mathlib/SetTheory/Ordinal/Arithmetic.lean,Mathlib/SetTheory/Ordinal/Exponential.lean,Mathlib/SetTheory/Ordinal/Notation.lean 6 2 ['github-actions', 'mathlib-merge-conflicts'] nobody
60-55308
1 month ago
63-42048
63 days ago
0-10825
3 hours
38546 yhx-12243
author:yhx-12243
 fix: universe issue in injective module Change the definition of ```lean class Module.Injective : Prop where out : ∀ ⦃X Y : Type v⦄ [AddCommGroup X] [AddCommGroup Y] [Module R X] [Module R Y] (f : X →ₗ[R] Y) (_ : Function.Injective f) (g : X →ₗ[R] Q), ∃ h : Y →ₗ[R] Q, ∀ x, h (f x) = g x ``` into ```lean class Module.Injective : Prop where out : ∀ ⦃X Y : Type u⦄ [AddCommGroup X] [AddCommGroup Y] [Module R X] [Module R Y] (f : X →ₗ[R] Y) (_ : Function.Injective f) (g : X →ₗ[R] Q), ∃ h : Y →ₗ[R] Q, ∀ x, h (f x) = g x ``` to make it agree with `Module.Baer` and real mathematical definition, **without universe issues**. Since the criterion `Module.Flat` also uses `Type u` on testing modules. See discussions in https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/Universe.20issue.20about.20injective.20module . --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra new-contributor awaiting-zulip
label:t-algebra$
 57/43 Mathlib/Algebra/Category/ModuleCat/Injective.lean,Mathlib/Algebra/Category/ModuleCat/Ulift.lean,Mathlib/Algebra/Module/Injective.lean,Mathlib/RepresentationTheory/FinGroupCharZero.lean,Mathlib/RingTheory/Flat/Tensor.lean,Mathlib/RingTheory/LocalProperties/Injective.lean 6 5 ['github-actions', 'grunweg', 'mathlib-bors', 'wwylele'] nobody
26-3857
26 days ago
26-3868
26 days ago
0-26133
7 hours
37346 euprunin
author:euprunin
 chore: golf using `grind` The goal of this PR is to decrease the number of times lemmas are called explicitly. Any decrease in compilation time is a welcome side effect, although it is not a primary objective. Trace profiling results (differences <30 ms considered measurement noise): * `✅️ SimpleGraph.Walk.IsPath.getVert_injOn`: unchanged 🎉 * `✅️ SimpleGraph.Walk.length_bypass_le`: unchanged 🎉 * `✅️ Rat.floor_intCast_div_natCast`: unchanged 🎉 * `✅️ InnerProductGeometry.norm_eq_of_angle_sub_eq_angle_sub_rev_of_angle_ne_pi`: unchanged 🎉 * `✅️ padicNorm.zero_of_padicNorm_eq_zero`: unchanged 🎉 Profiled using `set_option trace.profiler true in`. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) maintainer-merge awaiting-zulip 7/45 Mathlib/Combinatorics/SimpleGraph/Paths.lean,Mathlib/Data/Rat/Floor.lean,Mathlib/Geometry/Euclidean/Triangle.lean,Mathlib/NumberTheory/Padics/PadicNorm.lean 4 22 ['FernandoChu', 'bryangingechen', 'chenson2018', 'euprunin', 'faenuccio', 'github-actions', 'grunweg'] nobody
23-36081
23 days ago
23-36112
23 days ago
30-49603
30 days
32608 PrParadoxy
author:PrParadoxy
 feat(LinearAlgebra/PiTensorProduct): API for PiTensorProducts indexed by sets This PR addresses a TODO item in LinearAlgebra/PiTensorProduct.lean: * API for the various ways ι can be split into subsets; connect this with the binary tensor product -- specifically by describing tensors of type ⨂ (i : S), M i, for S : Set ι. Our primary motivation is to formalise the notion of "restricted tensor products". This will be the content of a follow-up PR. Beyond that, the Set API is natural in contexts where the index type has an independent interpretation. An example is quantum physics, where ι ranges over distinguishable degrees of freedom, and where its is common practice to annotate objects by the set of indices they are defined on. --- Stub file with preliminary definition of the restricted tensor product as a direct limit of tensors indexed by finite subsets of an index type: https://github.com/PrParadoxy/mathlib4/blob/restricted-stub/Mathlib/LinearAlgebra/PiTensorProduct/Restricted.lean --- - [x] depends on: #32598 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor awaiting-zulip t-algebra WIP
label:t-algebra$
 300/2 Mathlib.lean,Mathlib/LinearAlgebra/PiTensorProduct.lean,Mathlib/LinearAlgebra/PiTensorProduct/Set.lean 3 31 ['PrParadoxy', 'dagurtomas', 'eric-wieser', 'github-actions', 'goliath-klein', 'leanprover-radar', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
11-6368
11 days ago
151-17090
151 days ago
10-66980
10 days
39026 fpvandoorn
author:fpvandoorn
 feat: add assume tactic Teaching tactic: `assume p, q, r` is short for `intro (_ : p) (_ : q) (_ : r)`. --- [Zulip thread](https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/Assume.20tactic/with/593477478) [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) awaiting-zulip t-meta awaiting-author 123/0 Mathlib.lean,Mathlib/Tactic.lean,Mathlib/Tactic/Assume.lean,MathlibTest/Assume.lean 4 7 ['fpvandoorn', 'github-actions', 'joneugster'] joneugster
assignee:joneugster
8-9754
8 days ago
15-43664
15 days ago
0-1
1 second
32828 Hagb
author:Hagb
 feat(Algebra/Order/Group/Defs): add `IsOrderedAddMonoid.toIsOrderedCancelAddMonoid'` It is similar to `IsOrderedAddMonoid.toIsOrderedCancelAddMonoid`, while with different hypotheses. The conclusion `IsOrderedCancelMonoid α` on `IsOrderedAddMonoid.toIsOrderedCancelAddMonoid` still holds when the hypothesis `CommGroup α` is weakened to `CancelCommMonoid α` while `PartialOrder α` is strengthened to `LinearOrder α`. --- [`IsOrderedAddMonoid.toIsOrderedCancelAddMonoid`](https://leanprover-community.github.io/mathlib4_docs/find/?pattern=IsOrderedAddMonoid.toIsOrderedCancelAddMonoid#doc) and `IsOrderedAddMonoid.toIsOrderedCancelAddMonoid'`: https://github.com/leanprover-community/mathlib4/blob/97f78b1a4311fed1844b94f1c069219a48a098e1/Mathlib/Algebra/Order/Group/Defs.lean#L52-L62 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) awaiting-zulip t-algebra awaiting-author
label:t-algebra$
 4/0 Mathlib/Algebra/Order/Group/Defs.lean 1 15 ['Garmelon', 'Hagb', 'Vierkantor', 'artie2000', 'dagurtomas', 'github-actions', 'leanprover-radar'] eric-wieser
assignee:eric-wieser
5-72742
5 days ago
120-22765
120 days ago
40-42357
40 days
38957 wwylele
author:wwylele
 chore(GroupTheory/DivisibleHull): remove `backward.privateInPublic` --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) tech debt t-group-theory awaiting-zulip 5/12 Mathlib/GroupTheory/DivisibleHull.lean 1 11 ['Komyyy', 'github-actions', 'grunweg', 'jcommelin', 'wwylele'] jcommelin
assignee:jcommelin
3-36054
3 days ago
3-36054
3 days ago
13-78350
13 days
39233 linesthatinterlace
author:linesthatinterlace
 feat: `Pi.map` rename to `Function.map` This PR renames `Pi.map` to `Function.map` and makes the changes necessary to support this. In particular this means that Mathlib.Logic.Function.Defs now only contains the Function namespace. Zulip thread: [#PR reviews > #39233 - rename Pi.map to Function.map @ 💬](https://leanprover.zulipchat.com/#narrow/channel/144837-PR-reviews/topic/.2339233.20-.20rename.20Pi.2Emap.20to.20Function.2Emap/near/594605689) General discussion regarding the Pi namespace: https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/The.20Pi.20namespace/near/594782721 --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) awaiting-zulip merge-conflict 131/122 Mathlib/Algebra/Category/Grp/AB.lean,Mathlib/Algebra/Notation/Pi/Defs.lean,Mathlib/Algebra/Order/Antidiag/Nat.lean,Mathlib/Algebra/Regular/Pi.lean,Mathlib/Analysis/InnerProductSpace/Coalgebra.lean,Mathlib/Analysis/SpecialFunctions/PolarCoord.lean,Mathlib/Condensed/Discrete/LocallyConstant.lean,Mathlib/Control/Bifunctor.lean,Mathlib/Data/Finset/Powerset.lean,Mathlib/Data/Prod/Basic.lean,Mathlib/Data/Set/Prod.lean,Mathlib/Dynamics/Ergodic/MeasurePreserving.lean,Mathlib/Dynamics/PeriodicPts/Defs.lean,Mathlib/Dynamics/PeriodicPts/Lemmas.lean,Mathlib/Dynamics/TopologicalEntropy/Semiconj.lean,Mathlib/FieldTheory/Perfect.lean,Mathlib/Geometry/Manifold/IsManifold/Basic.lean,Mathlib/Geometry/Manifold/IsManifold/ExtChartAt.lean,Mathlib/GroupTheory/MonoidLocalization/Lemmas.lean,Mathlib/LinearAlgebra/Multilinear/Basis.lean,Mathlib/LinearAlgebra/Pi.lean,Mathlib/Logic/Equiv/Basic.lean,Mathlib/Logic/Equiv/PartialEquiv.lean,Mathlib/Logic/Function/Basic.lean,Mathlib/Logic/Function/Defs.lean,Mathlib/Logic/Function/Iterate.lean,Mathlib/Order/Filter/Cofinite.lean,Mathlib/Order/Filter/Pi.lean,Mathlib/RingTheory/Coalgebra/Basic.lean,Mathlib/Topology/Algebra/FilterBasis.lean,Mathlib/Topology/Algebra/Module/LinearMapPiProd.lean,Mathlib/Topology/Algebra/RestrictedProduct/TopologicalSpace.lean,Mathlib/Topology/Constructions.lean,Mathlib/Topology/Maps/Basic.lean,Mathlib/Topology/MetricSpace/HausdorffAlexandroff.lean,Mathlib/Topology/MetricSpace/Isometry.lean,Mathlib/Topology/NhdsWithin.lean 37 2 ['github-actions', 'mathlib-merge-conflicts'] nobody
1-78250
1 day ago
10-23204
10 days ago
0-7302
2 hours

PRs with just a merge conflict

Number Author Title Description Labels +/- Modified files (first 100) 📝 💬 All users who commented or reviewed Assignee(s) Updated Last status change total time in review
10721 urkud
author:urkud
 feat(Order/FunLike): define `PointwiseLE` - introduce a mixin class `DFunLike.PointwiseLE`, use it to define `DFunLike.instPartialOrder`; - add a generic `DFunLike.orderEmbeddingCoe` - add `DFunLike.PointwiseLE` instances here and there. With this refactor and #13022, I'm going to generalize lemmas like `MeasureTheory.ae_mono` to `OuterMeasureClass`. --- - [x] depends on: #12983 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-order t-logic 123/50 Mathlib.lean,Mathlib/Algebra/Order/Hom/Ring.lean,Mathlib/Data/DFinsupp/Order.lean,Mathlib/Data/Finsupp/Order.lean,Mathlib/Data/FunLike/Basic.lean,Mathlib/Dynamics/Circle/RotationNumber/TranslationNumber.lean,Mathlib/GroupTheory/Congruence.lean,Mathlib/Order/FunLike.lean,Mathlib/Order/Heyting/Hom.lean,Mathlib/Order/Hom/Basic.lean,Mathlib/Order/Hom/Bounded.lean,Mathlib/Order/Hom/CompleteLattice.lean,Mathlib/Topology/Order/Hom/Basic.lean 13 48 ['YaelDillies', 'dupuisf', 'leanprover-community-mathlib4-bot', 'urkud'] nobody
660-49751
1 year ago
710-28153
710 days ago
64-12984
64 days
8788 FMLJohn
author:FMLJohn
 feat(Algebra/Module/GradeZeroModule): if `A` is a graded semiring and `M` is a graded `A`-module, then each grade of `M` is a module over the 0-th grade of `A`. --- - [ ] depends on: #8187 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-algebra
label:t-algebra$
 237/4 Mathlib.lean,Mathlib/Algebra/DirectSum/Internal.lean,Mathlib/Algebra/GradedMonoid.lean,Mathlib/Algebra/Module/GradeZeroModule.lean,Mathlib/RingTheory/GradedAlgebra/Basic.lean,Mathlib/RingTheory/GradedAlgebra/Noetherian.lean 6 4 ['FMLJohn', 'github-actions', 'leanprover-community-mathlib4-bot'] nobody
660-49750
1 year ago
900-39646
900 days ago
1-57831
1 day
6777 adomani
author:adomani
 chore(Co*variantClass): replace eta-expanded (· * ·), (· + ·), (· ≤ ·), (· < ·) Replace `CovariantClass X X (· * ·) (· ≤ ·)` with -> `CovariantClass X X HMul.hMul LE.le` and similarly for `HAdd`, `LT`, `Contravariant`. This PR is inspired by [Issue #6646](https://github.com/leanprover-community/mathlib4/issues/6646) and, more specifically, [this comment](https://github.com/leanprover-community/mathlib4/issues/6646#issuecomment-1692792066). Note that https://github.com/leanprover/lean4/pull/2267 would make this unnecessary --- ```bash # First sed command: # the first captured pattern is `Co*variantClass ` # the second captured pattern is `` # the third captured pattern is `+` or `*` # the fourth captured pattern is `<` or `≤` # a match for `Co*variantClass (· ·) (· ·)` becomes # `Co*variantClass replaceop replaceop` # Second sed command: similar to the first, but looks for `(Function.swap (· ·))` sed -i ' s=\(Co[ntra]*variantClass \(..*\) \2 \)(· *\([+*]\) *·) (· *\([<≤]\) *·)=\1replaceop\3 replaceop\4=g s=\(Co[ntra]*variantClass \(..*\) \2 \)(\([Functio\.swap ]*\)(· *\([+*]\) *·)) (· *\([<≤]\) *·)=\1(\3replaceop\4) replaceop\5=g s=replaceop+=HAdd.hAdd=g s=replaceop\*=HMul.hMul=g s=replaceop<=LT.lt=g s=replaceop≤=LE.le=g s=\(Co[ntra]*variantClass N N\) (· \* ·) r=\1 HMul.hMul r=g s=\(Co[ntra]*variantClass N N (swap μ)\) (· ≤ ·)=\1 LE.le=g s=\(Co[ntra]*variantClass N N\) (swap (· \* ·)) r=\1 (swap HMul.hMul) r=g s=\(CovariantClass (Filter α) (Filter α)\) (· / ·) (· ≤ ·)=\1 HDiv.hDiv LE.le=g s=\(CovariantClass (Filter α) (Filter α)\) (swap (· / ·)) (· ≤ ·)=\1 (swap HDiv.hDiv) LE.le=g s=\(Co[ntra]*variantClass .* (fun x y .> . \* .)\) (· ≤ ·)=\1 LE.le=g s=\(Co[ntra]*variantClass .* (fun x y .> . \* .)\) (· < ·)=\1 LT.lt=g s=\(Co[ntra]*variantClass [^}]*\) (· ≤ ·)=\1 LE.le=g s=\(CovariantClass .* (Filter β)\) (· • ·) LE.le=\1 HSMul.hSMul LE.le=g ' $(git ls-files '*.lean') ``` [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict 703/678 Counterexamples/ZeroDivisorsInAddMonoidAlgebras.lean,Mathlib/Algebra/BigOperators/Basic.lean,Mathlib/Algebra/Bounds.lean,Mathlib/Algebra/CovariantAndContravariant.lean,Mathlib/Algebra/DirectSum/Internal.lean,Mathlib/Algebra/Group/UniqueProds.lean,Mathlib/Algebra/GroupPower/Order.lean,Mathlib/Algebra/MonoidAlgebra/Degree.lean,Mathlib/Algebra/Order/Archimedean.lean,Mathlib/Algebra/Order/Group/Abs.lean,Mathlib/Algebra/Order/Group/Defs.lean,Mathlib/Algebra/Order/Group/DenselyOrdered.lean,Mathlib/Algebra/Order/Group/MinMax.lean,Mathlib/Algebra/Order/Group/OrderIso.lean,Mathlib/Algebra/Order/Hom/Monoid.lean,Mathlib/Algebra/Order/Interval.lean,Mathlib/Algebra/Order/Kleene.lean,Mathlib/Algebra/Order/LatticeGroup.lean,Mathlib/Algebra/Order/Module.lean,Mathlib/Algebra/Order/Monoid/Basic.lean,Mathlib/Algebra/Order/Monoid/Cancel/Defs.lean,Mathlib/Algebra/Order/Monoid/Canonical/Defs.lean,Mathlib/Algebra/Order/Monoid/Defs.lean,Mathlib/Algebra/Order/Monoid/Lemmas.lean,Mathlib/Algebra/Order/Monoid/MinMax.lean,Mathlib/Algebra/Order/Monoid/NatCast.lean,Mathlib/Algebra/Order/Monoid/OrderDual.lean,Mathlib/Algebra/Order/Monoid/Prod.lean,Mathlib/Algebra/Order/Monoid/WithTop.lean,Mathlib/Algebra/Order/Monoid/WithZero/Basic.lean,Mathlib/Algebra/Order/Monoid/WithZero/Defs.lean,Mathlib/Algebra/Order/Nonneg/Ring.lean,Mathlib/Algebra/Order/Pointwise.lean,Mathlib/Algebra/Order/Positive/Ring.lean,Mathlib/Algebra/Order/Ring/Canonical.lean,Mathlib/Algebra/Order/Ring/Defs.lean,Mathlib/Algebra/Order/Ring/Lemmas.lean,Mathlib/Algebra/Order/Sub/Basic.lean,Mathlib/Algebra/Order/Sub/Canonical.lean,Mathlib/Algebra/Order/Sub/Defs.lean,Mathlib/Algebra/Order/WithZero.lean,Mathlib/Algebra/Parity.lean,Mathlib/Algebra/Star/Order.lean,Mathlib/Algebra/Tropical/Basic.lean,Mathlib/Analysis/Normed/Order/Lattice.lean,Mathlib/Data/DFinsupp/Lex.lean,Mathlib/Data/DFinsupp/Order.lean,Mathlib/Data/Finset/Fold.lean,Mathlib/Data/Finsupp/Lex.lean,Mathlib/Data/Finsupp/Order.lean,Mathlib/Data/List/BigOperators/Basic.lean,Mathlib/Data/List/BigOperators/Lemmas.lean,Mathlib/Data/Multiset/Basic.lean,Mathlib/Data/Nat/Cast/Order.lean,Mathlib/Data/PNat/Basic.lean,Mathlib/Data/Real/ENNReal.lean,Mathlib/Data/Real/NNReal.lean,Mathlib/Data/Set/Semiring.lean,Mathlib/Data/Sign.lean,Mathlib/MeasureTheory/Function/LpOrder.lean,Mathlib/MeasureTheory/Function/SimpleFuncDenseLp.lean,Mathlib/MeasureTheory/Measure/MeasureSpace.lean,Mathlib/MeasureTheory/Measure/VectorMeasure.lean,Mathlib/Order/ConditionallyCompleteLattice/Group.lean,Mathlib/Order/Filter/Basic.lean,Mathlib/Order/Filter/Pointwise.lean,Mathlib/Probability/Martingale/Basic.lean,Mathlib/Probability/Process/Stopping.lean,Mathlib/RingTheory/GradedAlgebra/Basic.lean,Mathlib/SetTheory/Cardinal/Basic.lean,Mathlib/SetTheory/Game/Basic.lean,Mathlib/SetTheory/Game/PGame.lean,Mathlib/SetTheory/Ordinal/Arithmetic.lean,Mathlib/SetTheory/Ordinal/Basic.lean,Mathlib/SetTheory/Ordinal/NaturalOps.lean,Mathlib/Tactic/GCongr/Core.lean,Mathlib/Tactic/Positivity/Basic.lean,Mathlib/Topology/ContinuousFunction/Algebra.lean,lean-toolchain,test/Recall.lean,test/propose.lean 81 37 ['adomani', 'alreadydone', 'digama0', 'eric-wieser', 'ericrbg', 'jcommelin', 'leanprover-bot', 'sgouezel', 'vihdzp'] nobody
660-49749
1 year ago
935-15246
935 days ago
35-63136
35 days
7875 astrainfinita
author:astrainfinita
 chore: make `SMulCommClass A A B` and `SMulCommClass A B B` higher priority --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict slow-typeclass-synthesis t-algebra
label:t-algebra$
 54/48 Mathlib/Algebra/Algebra/Basic.lean,Mathlib/Algebra/Algebra/NonUnitalSubalgebra.lean,Mathlib/Algebra/DirectSum/Algebra.lean,Mathlib/Algebra/Group/Action/Defs.lean,Mathlib/Algebra/Group/Subgroup/Actions.lean,Mathlib/Algebra/Lie/NonUnitalNonAssocAlgebra.lean,Mathlib/Algebra/Module/LinearMap/End.lean,Mathlib/Algebra/MonoidAlgebra/Basic.lean,Mathlib/Algebra/MvPolynomial/Basic.lean,Mathlib/Algebra/Ring/CentroidHom.lean,Mathlib/Algebra/Ring/Subring/Basic.lean,Mathlib/Algebra/Ring/Subsemiring/Basic.lean,Mathlib/Algebra/Star/NonUnitalSubalgebra.lean,Mathlib/Analysis/Complex/UnitDisc/Basic.lean,Mathlib/Analysis/NormedSpace/lpSpace.lean,Mathlib/Data/Matrix/Basic.lean,Mathlib/GroupTheory/GroupAction/Prod.lean,Mathlib/GroupTheory/GroupAction/Ring.lean,Mathlib/GroupTheory/GroupAction/SubMulAction.lean,Mathlib/GroupTheory/MonoidLocalization.lean,Mathlib/GroupTheory/Submonoid/Center.lean,Mathlib/LinearAlgebra/PiTensorProduct.lean,Mathlib/RingTheory/Ideal/Quotient.lean,Mathlib/RingTheory/TensorProduct/Basic.lean,Mathlib/Topology/ContinuousFunction/ContinuousMapZero.lean,Mathlib/Topology/ContinuousFunction/StoneWeierstrass.lean,Mathlib/Topology/ContinuousFunction/ZeroAtInfty.lean 27 15 ['Parcly-Taxel', 'astrainfinita', 'jcommelin', 'leanprover-bot'] nobody
660-49749
1 year ago
714-66257
714 days ago
1-47913
1 day
6491 eric-wieser
author:eric-wieser
 chore(Mathlib/Algebra/Hom/GroupAction): add `SMulHomClass.comp_smul` --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-algebra
label:t-algebra$
 24/10 Mathlib/Algebra/Hom/GroupAction.lean 1 0 [] nobody
660-49748
1 year ago
932-35748
932 days ago
83-76369
83 days
10629 madvorak
author:madvorak
 feat: List.cons_sublist_append_iff_right --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-data 11/0 Mathlib/Data/List/Basic.lean 1 1 ['eric-wieser'] nobody
646-43293
1 year ago
772-52130
772 days ago
53-73442
53 days
13791 digama0
author:digama0
 refactor: Primrec and Partrec General cleanup of the `Primrec` and `Partrec` files, to better adjust to lean 4 things. The main user-visible change is that `Primrec₂` is no longer a `def` but an `abbrev`, because it was causing inference issues in lean 4. I also removed all the nonterminal `simp`s in `PartrecCode.lean`. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-computability tech debt 585/778 Mathlib/Computability/Ackermann.lean,Mathlib/Computability/Halting.lean,Mathlib/Computability/Partrec.lean,Mathlib/Computability/PartrecCode.lean,Mathlib/Computability/Primrec.lean 5 2 ['github-actions', 'grunweg'] nobody
642-6138
1 year ago
705-82124
705 days ago
1-84718
1 day
11964 adamtopaz
author:adamtopaz
 feat: The functor of points of a scheme We construct the functor of points functor, and prove that it's full and faithful. --- - [x] depends on: #11947 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-algebraic-geometry t-category-theory 210/0 Mathlib.lean,Mathlib/AlgebraicGeometry/FunctorOfPoints.lean,Mathlib/AlgebraicGeometry/OpenImmersion.lean 3 4 ['github-actions', 'grunweg'] nobody
642-5997
1 year ago
770-22938
770 days ago
0-1223
20 minutes
12418 rosborn
author:rosborn
 style: replace preimage_val with ↓∩ notation --- This is a rough draft of what the new `↓∩` notation would look like within mathlib. I believe this is an improvement in clarity and would like to have `↓∩` as a standard notation (along with `''`, `⁻¹'`, `↑`, etc...). As `↓∩` is specialized for `Set`s, I have only changed `preimage_val` when the left-hand side of `↓∩` is a `Set`. The introduction of the `↓∩` notation to Data.Set.Image is temporary as it isn't possible to import Data.Set.Subset directly. If we want `↓∩` unscoped, where would be the best place to define it? An option is Data.Set.Defs, but the notation cannot be defined without additional imports as the file does not import `notation3`. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict 56/61 Mathlib/Analysis/InnerProductSpace/Projection.lean,Mathlib/Data/Set/Function.lean,Mathlib/Data/Set/Image.lean,Mathlib/Data/Set/Subset.lean,Mathlib/MeasureTheory/Constructions/Polish.lean,Mathlib/MeasureTheory/MeasurableSpace/Basic.lean,Mathlib/MeasureTheory/Measure/Restrict.lean,Mathlib/Order/UpperLower/Basic.lean,Mathlib/Topology/Bases.lean,Mathlib/Topology/Clopen.lean,Mathlib/Topology/Connected/Basic.lean,Mathlib/Topology/Connected/PathConnected.lean,Mathlib/Topology/Constructions.lean,Mathlib/Topology/ContinuousOn.lean,Mathlib/Topology/LocalAtTarget.lean,Mathlib/Topology/LocallyConstant/Basic.lean,Mathlib/Topology/Separation.lean,Mathlib/Topology/Sober.lean 18 3 ['grunweg', 'rosborn'] nobody
642-5896
1 year ago
728-15880
728 days ago
29-50022
29 days
12751 Command-Master
author:Command-Master
 feat: add lemmas for Nat/Bits, Nat/Bitwise and Nat/Size Remove `@[simp]` from `Nat.bit_false` and `Nat.bit_true`, as `bit0` and `bit1` are deprecated, and add some lemmas to `Bits`, `Bitwise` and `Size`. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-data new-contributor 66/7 Mathlib/Data/Nat/Bits.lean,Mathlib/Data/Nat/Bitwise.lean,Mathlib/Data/Nat/Multiplicity.lean,Mathlib/Data/Nat/Size.lean 4 26 ['Command-Master', 'Rida-Hamadani', 'Ruben-VandeVelde', 'YaelDillies', 'github-actions', 'jcommelin'] nobody
641-27050
1 year ago
676-33272
676 days ago
56-40668
56 days
10350 Shamrock-Frost
author:Shamrock-Frost
 feat(Data/Setoid): add the operations of taking the equivalence class of an element and of saturating a set wrt an equivalence relation I'm open to suggestions about changing the name "saturate", someone on zulip rightly pointed out this is a very overloaded term in math. That said, I think it's unlikely to cause confusion and that there's only one reasonable interpretation in the context of setoids. --- - [x] depends on: #10347 - [x] depends on: #10348 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-data 169/3 Mathlib/Data/Setoid/Basic.lean,Mathlib/Data/Setoid/Partition.lean,Mathlib/Order/Closure.lean 3 1 ['leanprover-community-mathlib4-bot'] nobody
639-29324
1 year ago
758-20952
758 days ago
19-74546
19 days
17127 FR-vdash-bot
author:FR-vdash-bot
 chore: remove global `Quotient.mk` `⟦·⟧` notation --- Merge this PR when we are ready to migrate to `QuotLike` API (#16421). [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-data 137/2 Counterexamples/Pseudoelement.lean,Mathlib/Algebra/Associated/Basic.lean,Mathlib/Algebra/BigOperators/Group/Finset.lean,Mathlib/Algebra/Group/Conj.lean,Mathlib/Algebra/GroupWithZero/NonZeroDivisors.lean,Mathlib/Algebra/Order/CauSeq/Completion.lean,Mathlib/Algebra/Quandle.lean,Mathlib/AlgebraicGeometry/EllipticCurve/Jacobian.lean,Mathlib/AlgebraicGeometry/EllipticCurve/Projective.lean,Mathlib/AlgebraicTopology/FundamentalGroupoid/Basic.lean,Mathlib/AlgebraicTopology/FundamentalGroupoid/FundamentalGroup.lean,Mathlib/AlgebraicTopology/FundamentalGroupoid/InducedMaps.lean,Mathlib/AlgebraicTopology/FundamentalGroupoid/Product.lean,Mathlib/AlgebraicTopology/FundamentalGroupoid/SimplyConnected.lean,Mathlib/CategoryTheory/Abelian/Pseudoelements.lean,Mathlib/CategoryTheory/Limits/Shapes/SingleObj.lean,Mathlib/CategoryTheory/Monoidal/Free/Basic.lean,Mathlib/CategoryTheory/Monoidal/Free/Coherence.lean,Mathlib/CategoryTheory/Skeletal.lean,Mathlib/Data/Finset/Card.lean,Mathlib/Data/Fintype/List.lean,Mathlib/Data/Fintype/Quotient.lean,Mathlib/Data/Multiset/Basic.lean,Mathlib/Data/QPF/Multivariate/Constructions/Fix.lean,Mathlib/Data/QPF/Univariate/Basic.lean,Mathlib/Data/Quot.lean,Mathlib/Data/Real/Basic.lean,Mathlib/Data/Set/Finite.lean,Mathlib/Data/Set/Image.lean,Mathlib/Data/Setoid/Basic.lean,Mathlib/GroupTheory/GroupAction/Basic.lean,Mathlib/GroupTheory/GroupAction/Quotient.lean,Mathlib/LinearAlgebra/Dual.lean,Mathlib/LinearAlgebra/Ray.lean,Mathlib/Logic/Encodable/Basic.lean,Mathlib/Logic/Equiv/Basic.lean,Mathlib/ModelTheory/DirectLimit.lean,Mathlib/ModelTheory/Fraisse.lean,Mathlib/ModelTheory/Quotients.lean,Mathlib/NumberTheory/NumberField/CanonicalEmbedding/FundamentalCone.lean,Mathlib/NumberTheory/NumberField/Embeddings.lean,Mathlib/NumberTheory/NumberField/Units/DirichletTheorem.lean,Mathlib/NumberTheory/Padics/PadicIntegers.lean,Mathlib/NumberTheory/Padics/PadicNumbers.lean,Mathlib/Order/RelIso/Basic.lean,Mathlib/RepresentationTheory/Action/Concrete.lean,Mathlib/SetTheory/Cardinal/Basic.lean,Mathlib/SetTheory/Cardinal/Ordinal.lean,Mathlib/SetTheory/Game/Basic.lean,Mathlib/SetTheory/Game/Birthday.lean,Mathlib/SetTheory/Game/Impartial.lean,Mathlib/SetTheory/Game/Ordinal.lean,Mathlib/SetTheory/Game/State.lean,Mathlib/SetTheory/Lists.lean,Mathlib/SetTheory/Ordinal/Arithmetic.lean,Mathlib/SetTheory/Ordinal/Basic.lean,Mathlib/SetTheory/Surreal/Basic.lean,Mathlib/SetTheory/Surreal/Dyadic.lean,Mathlib/SetTheory/Surreal/Multiplication.lean,Mathlib/SetTheory/ZFC/Basic.lean,Mathlib/SetTheory/ZFC/Rank.lean,Mathlib/Topology/Connected/PathConnected.lean,Mathlib/Topology/Homotopy/HomotopyGroup.lean,Mathlib/Topology/Homotopy/Path.lean,Mathlib/Topology/Homotopy/Product.lean,Mathlib/Topology/MetricSpace/GromovHausdorff.lean,Mathlib/Topology/UniformSpace/Separation.lean,test/interactiveUnfold.lean 68 1 ['github-actions'] nobody
599-64389
1 year ago
599-64389
599 days ago
4-72805
4 days
13156 erdOne
author:erdOne
 refactor(Algebra/Module/LocalizedModule): Redefine `LocalizedModule` in terms of `OreLocalization`. --- - [x] depends on: #13151 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-algebra
label:t-algebra$
 519/628 Mathlib.lean,Mathlib/Algebra/Module/LocalizedModule.lean,Mathlib/AlgebraicGeometry/Modules/Tilde.lean,Mathlib/RingTheory/DedekindDomain/Different.lean,Mathlib/RingTheory/Localization/BaseChange.lean,Mathlib/RingTheory/OreLocalization/Basic.lean,Mathlib/RingTheory/OreLocalization/Module.lean,Mathlib/RingTheory/OreLocalization/Ring.lean 8 4 ['github-actions', 'leanprover-bot', 'leanprover-community-mathlib4-bot', 'mattrobball'] nobody
585-30271
1 year ago
585-30271
585 days ago
51-84473
51 days
14598 Command-Master
author:Command-Master
 chore: add typeclasses to unify various `add_top`, `add_eq_top`, etc. Add the four typeclasses `IsTopAbsorbing`, `IsBotAbsorbing`, `NoTopSum`, `NoBotSum`, as additive equivalents for `MulZeroClass` and `NoZeroDivisors`. Add instances of these for `ENNReal`, `WithTop α`, `WithBot α`, `PUnit`, `EReal`, `PartENat`, `Measure`, `Interval` and `Filter`. Also split `Algebra/Order/AddGroupWithTop` to `Algebra/Order/Group/WithTop` and `Algebra/Order/Monoid/WithTop` --- Previous usages of lemmas with quantified names like `WithTop.add_top` have to be changed to just `add_top`. `add_lt_top` is `@[simp]`, in accordance with `ENNReal.add_lt_top` being `@[simp]`. This affects `WithTop.add_lt_top` which previously hadn't been `@[simp]`. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-algebra t-order new-contributor
label:t-algebra$
 264/195 Archive/Wiedijk100Theorems/BallotProblem.lean,Mathlib.lean,Mathlib/Algebra/Order/Group/WithTop.lean,Mathlib/Algebra/Order/GroupWithZero/Canonical.lean,Mathlib/Algebra/Order/Interval/Basic.lean,Mathlib/Algebra/Order/Monoid/Unbundled/Basic.lean,Mathlib/Algebra/Order/Monoid/Unbundled/Defs.lean,Mathlib/Algebra/Order/Monoid/Unbundled/WithTop.lean,Mathlib/Algebra/Order/Monoid/WithTop.lean,Mathlib/Algebra/PUnitInstances/Order.lean,Mathlib/Algebra/Polynomial/Degree/Definitions.lean,Mathlib/Algebra/Polynomial/Monic.lean,Mathlib/Algebra/Tropical/Basic.lean,Mathlib/Analysis/Analytic/Meromorphic.lean,Mathlib/Analysis/Normed/Lp/ProdLp.lean,Mathlib/Analysis/NormedSpace/ENorm.lean,Mathlib/Analysis/SpecialFunctions/JapaneseBracket.lean,Mathlib/Analysis/SpecialFunctions/Log/ENNRealLog.lean,Mathlib/Data/ENNReal/Operations.lean,Mathlib/Data/ENat/Basic.lean,Mathlib/Data/Nat/PartENat.lean,Mathlib/Data/Nat/WithBot.lean,Mathlib/Data/Real/EReal.lean,Mathlib/LinearAlgebra/Lagrange.lean,Mathlib/MeasureTheory/Covering/Differentiation.lean,Mathlib/MeasureTheory/Decomposition/Lebesgue.lean,Mathlib/MeasureTheory/Function/ConditionalExpectation/CondexpL1.lean,Mathlib/MeasureTheory/Function/Jacobian.lean,Mathlib/MeasureTheory/Function/L1Space.lean,Mathlib/MeasureTheory/Function/L2Space.lean,Mathlib/MeasureTheory/Function/LpSeminorm/Basic.lean,Mathlib/MeasureTheory/Function/LpSeminorm/TriangleInequality.lean,Mathlib/MeasureTheory/Function/LpSpace.lean,Mathlib/MeasureTheory/Function/StronglyMeasurable/Basic.lean,Mathlib/MeasureTheory/Function/UniformIntegrable.lean,Mathlib/MeasureTheory/Integral/Bochner.lean,Mathlib/MeasureTheory/Integral/MeanInequalities.lean,Mathlib/MeasureTheory/Integral/SetIntegral.lean,Mathlib/MeasureTheory/Integral/VitaliCaratheodory.lean,Mathlib/MeasureTheory/Measure/Hausdorff.lean,Mathlib/MeasureTheory/Measure/Lebesgue/Basic.lean,Mathlib/MeasureTheory/Measure/LevyProkhorovMetric.lean,Mathlib/MeasureTheory/Measure/MeasureSpace.lean,Mathlib/MeasureTheory/Measure/MeasureSpaceDef.lean,Mathlib/MeasureTheory/Measure/Regular.lean,Mathlib/MeasureTheory/Measure/Typeclasses.lean,Mathlib/NumberTheory/Padics/PadicNumbers.lean,Mathlib/Order/Filter/Pointwise.lean,Mathlib/Probability/Kernel/Defs.lean,Mathlib/Probability/Martingale/Convergence.lean,Mathlib/RingTheory/Multiplicity.lean,Mathlib/RingTheory/MvPowerSeries/NoZeroDivisors.lean,Mathlib/RingTheory/UniqueFactorizationDomain.lean,Mathlib/Topology/EMetricSpace/Defs.lean,Mathlib/Topology/MetricSpace/Bounded.lean,Mathlib/Topology/MetricSpace/HausdorffDistance.lean,Mathlib/Topology/MetricSpace/Lipschitz.lean 57 30 ['Command-Master', 'YaelDillies', 'github-actions'] nobody
562-59855
1 year ago
562-59855
562 days ago
7-45599
7 days
19212 Julian
author:Julian
 feat(LinearAlgebra): add a variable_alias for VectorSpace Taken directly from the variable_alias docs. Zulip: https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/why.20.5Bvariable_alias.5D.20attribute.20is.20not.20used.20in.20Mathlib.3F --- This is the first actual variable alias added to mathlib. I haven't reviewed variable_alias fully, but it seems like there's at least 3 ways they could be distributed in Mathlib: * alongside whatever subfolder they "belong to" (which is what I've tentatively done here) * In a file called `Aliases` somewhere near the thing they alias (which seems less discoverable to me) * In a single file, a la `Mathlib.TrainingWheels` (with some less playful name) which is meant to define a bunch of more "friendly" aliases all in one place. I kind of like the idea of the third thing as a future module but perhaps it can be synthesized if/when there are more aliases? For now as I say I've done the first one, but please let me know if someone prefers something else. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-algebra
label:t-algebra$
 25/0 Mathlib.lean,Mathlib/LinearAlgebra/VectorSpace.lean,scripts/noshake.json 3 10 ['Julian', 'PieterCuijpers', 'github-actions', 'urkud'] nobody
542-36610
1 year ago
542-36610
542 days ago
7-68089
7 days
19337 zeramorphic
author:zeramorphic
 feat(Data/Finsupp): generalise `Finsupp` to any "zero" value Remove the explicit dependence of `Finsupp` on `[Zero M]`, instead defining `Finsupp'` (better name pending) to be functions that are equal to a fixed value `z : M` cofinitely often. This PR is intended to do the initial work of replacing the definition of `Finsupp` with an instantiation of the more general definition, without adding any appropriate API. If accepted, the API development will follow in later PRs. Issues to consider: - Naming of `Finsupp'.` - Where should `Finsupp'` lemmas go? Do they need their own file/folder under `Data/`? Relevant Zulip threads: - https://leanprover.zulipchat.com/#narrow/channel/217875-Is-there-code-for-X.3F/topic/Finsupp.20generalisations - https://leanprover.zulipchat.com/#narrow/channel/217875-Is-there-code-for-X.3F/topic/Finsupp-like.20partial.20function Comments are welcome. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-data 203/83 Archive/Wiedijk100Theorems/Partition.lean,Mathlib/Algebra/MvPolynomial/Basic.lean,Mathlib/Algebra/MvPolynomial/Rename.lean,Mathlib/Algebra/MvPolynomial/Variables.lean,Mathlib/Algebra/Polynomial/Basic.lean,Mathlib/Algebra/Polynomial/Laurent.lean,Mathlib/Data/Finsupp/BigOperators.lean,Mathlib/Data/Finsupp/Defs.lean,Mathlib/Data/Finsupp/Order.lean,Mathlib/Data/Nat/Choose/Multinomial.lean,Mathlib/RingTheory/MvPolynomial/Symmetric/Defs.lean,Mathlib/RingTheory/PowerBasis.lean,scripts/nolints_prime_decls.txt 13 5 ['github-actions', 'vihdzp', 'zeramorphic'] nobody
540-12687
1 year ago
540-12687
540 days ago
4-60621
4 days
18756 astrainfinita
author:astrainfinita
 refactor: deprecate `DistribMulActionSemiHomClass` `MulSemiringActionSemiHomClass` --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-algebra
label:t-algebra$
 50/28 Mathlib/Algebra/Algebra/NonUnitalHom.lean,Mathlib/Algebra/Module/LinearMap/Defs.lean,Mathlib/GroupTheory/GroupAction/Hom.lean 3 4 ['astrainfinita', 'github-actions', 'leanprover-bot'] nobody
528-64756
1 year ago
528-64756
528 days ago
31-53021
31 days
16120 awainverse
author:awainverse
 feat(ModelTheory/Algebra/Ring/Basic): Ring homomorphisms are a `StrongHomClass` for the language of rings Adds an `IsAlgebraic` instance to the language of rings Adds a `StrongHomClass` instance to the type of ring homomorphisms between rings with `CompatibleRing` structures --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-algebra RFC t-logic
label:t-algebra$
 34/13 Mathlib/ModelTheory/Algebra/Ring/Basic.lean 1 10 ['ChrisHughes24', 'YaelDillies', 'awainverse', 'github-actions', 'jcommelin'] nobody
500-80930
1 year ago
500-80930
500 days ago
135-29017
135 days
20527 trivial1711
author:trivial1711
 refactor(Topology/UniformSpace/Completion): more descriptive names for `α → Completion α` - We rename the various maps `α → Completion α` in order to make their names more consistent. - Let `α` be a uniform space. We rename the uniformly continuous function `α → Completion α` from `UniformSpace.Completion.coe'` to `UniformSpace.Completion.coe`. - Let `α` be a uniform additive group. We rename the additive group homomorphism `α →+ Completion α` from `UniformSpace.Completion.toCompl` to `UniformSpace.Completion.coeAddHom`. - Let `α` be a uniform ring. The ring homomorphism `α →+* Completion α` is called `UniformSpace.Completion.coeRingHom`; its name is unchanged. - Let `α` be a normed space over a field `𝕜`. We rename the linear isometry `α →ₗᵢ[𝕜] Completion α` from `UniformSpace.Completion.toComplₗᵢ` to `UniformSpace.Completion.coeₗᵢ`. - Let `α` be a normed space over a field `𝕜`. We rename the continuous linear map `α →L[𝕜] Completion α` from `UniformSpace.Completion.toComplL` to `UniformSpace.Completion.coeL`. - Let `α` be a normed additive group. We rename the norm preserving homomorphism `NormedAddGroupHom α (Completion α)` from `NormedAddCommGroup.toCompl` to `UniformSpace.Completion.coeNormedAddGroupHom`. - We analogously rename some other theorems. - We add some trivial theorems (all of which are proved by `rfl`) that state that the functions considered above are equal. We give all of them the `simp` and `norm_cast` attributes. - We add a new theorem `UniformSpace.Completion.coeAddHom_eq_coe` that states that `UniformSpace.Completion.coeAddHom` and `UniformSpace.Completion.coe` are equal as functions. - We similarly add a new theorem `UniformSpace.Completion.coeRingHom_eq_coe`. - We rename the theorem `UniformSpace.Completion.coe_toComplₗᵢ` to `UniformSpace.Completion.coeₗᵢ_eq_coe`. - We rename the theorem `UniformSpace.Completion.coe_toComplL` to `UniformSpace.Completion.coeL_eq_coe`. - We similarly add a new theorem `UniformSpace.Completion.coeNormedAddGroupHom_eq_coe`. - We change all occurrences of the string `((↑) : α → Completion α)` to `(coe : α → Completion α)` or just `coe`. - We put the statements of some theorems into simp normal form by using the plain function `coe` rather than the homomorphisms that carry more structure. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-topology 130/92 Mathlib/Analysis/Analytic/Uniqueness.lean,Mathlib/Analysis/Calculus/FDeriv/Analytic.lean,Mathlib/Analysis/Complex/AbsMax.lean,Mathlib/Analysis/Complex/Liouville.lean,Mathlib/Analysis/InnerProductSpace/Completion.lean,Mathlib/Analysis/Normed/Group/HomCompletion.lean,Mathlib/Analysis/Normed/Module/Completion.lean,Mathlib/Analysis/SpecialFunctions/NonIntegrable.lean,Mathlib/MeasureTheory/Integral/IntegralEqImproper.lean,Mathlib/Topology/Algebra/GroupCompletion.lean,Mathlib/Topology/Algebra/InfiniteSum/GroupCompletion.lean,Mathlib/Topology/Algebra/InfiniteSum/Nonarchimedean.lean,Mathlib/Topology/Algebra/Nonarchimedean/Completion.lean,Mathlib/Topology/Algebra/UniformRing.lean,Mathlib/Topology/Category/UniformSpace.lean,Mathlib/Topology/MetricSpace/Completion.lean,Mathlib/Topology/UniformSpace/Completion.lean 17 4 ['eric-wieser', 'github-actions', 'trivial1711'] nobody
494-25562
1 year ago
494-25562
494 days ago
6-66637
6 days
18474 FR-vdash-bot
author:FR-vdash-bot
 perf: lower the priority of `*WithOne.to*` instances --- From #7873. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict slow-typeclass-synthesis t-algebra t-data
label:t-algebra$
 9/2 Mathlib/Algebra/Polynomial/BigOperators.lean,Mathlib/Data/Int/Cast/Defs.lean,Mathlib/Data/Nat/Cast/Defs.lean 3 7 ['astrainfinita', 'eric-wieser', 'github-actions', 'leanprover-bot'] nobody
492-12592
1 year ago
492-12592
492 days ago
76-66907
76 days
20372 jvlmdr
author:jvlmdr
 feat(MeasureTheory/Function): Add ContinuousLinearMap.bilinearCompLp(L) Introduce ContinuousLinearMap.bilinearCompLp and bilinearCompLpL. Generalize eLpNorm_le_eLpNorm_mul_eLpNorm theorems to include constant C in bound condition. --- Expect this may be useful for defining tempered distributions from functions in `L^p`. The definitions more or less follow `ContinuousLinearMap.compLp...`. Names are loosely analogous to `ContinuousLinearMap.bilinearComp` and `SchwartzMap.bilinLeftCLM`. Note: I preferred the spelling `hpqr : p⁻¹ + q⁻¹ = r⁻¹` with `f` in `L^p` and `g` in `L^q` to `hpqr : 1 / p = 1 / q + 1 / r`. It's easier to obtain from `ENNReal.IsConjExponent` too. A few questions: - [ ] I defined `bilinear{Left,Right}LpL` in addition to `bilinearCompLpL` because `LinearMap.mkContinuous₂` is marked as `noncomputable` and `LinearMap.mkContinuous` is not. Is this worth the extra definitions? (Note: This is not visible in the source due to `noncomputable section`.) - [ ] Should I use `C : ℝ` instead of `C : NNReal` for `eLpNorm_le_eLpNorm_mul_eLpNorm'_of_norm'`? - [ ] Is it going to be painful to have `[Fact (1 ≤ p)] [Fact (1 ≤ q)] [Fact (1 ≤ r)]`? I don't think there's a way to avoid it though. Maybe providing specialized versions for `p.IsConjExponent q` with `L^1`? Naming: - [ ] Is it satisfactory to add a `'` to the `eLpNorm_le_eLpNorm_mul_eLpNorm ` definitions in `CompareExp.lean` where `≤ ‖f x‖ * ‖g x‖` has been replaced with `≤ C * ‖f x‖ * ‖g x‖`? These could replace the existing theorems, although I don't want to break backwards compatibility. There are 5 instances: `eLpNorm_le_eLpNorm_top_mul_eLpNorm'`, `eLpNorm_le_eLpNorm_mul_eLpNorm_top'`, `eLpNorm'_le_eLpNorm'_mul_eLpNorm''`, `eLpNorm_le_eLpNorm_mul_eLpNorm_of_nnnorm'`, `eLpNorm_le_eLpNorm_mul_eLpNorm'_of_norm'` (I'm not sure why the existing theorem `eLpNorm_le_eLpNorm_mul_eLpNorm'_of_norm` has an internal `'`) - [ ] Is `bilinearLeftLpL` a suitable name? Other options: `bilinearCompLpLeftL`, `bilinearCompLeftLpL`, `bilinLeftLpL` (analogous to `SchwartzMap.bilinLeftCLM`) [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-measure-probability new-contributor 203/40 Mathlib/MeasureTheory/Function/LpSeminorm/CompareExp.lean,Mathlib/MeasureTheory/Function/LpSpace.lean 2 1 ['github-actions'] nobody
479-36849
1 year ago
479-36849
479 days ago
27-43617
27 days
21959 BGuillemet
author:BGuillemet
 feat(Topology/ContinuousMap): Stone-Weierstrass theorem for MvPolynomial Add the subalgebra of multivariate polynomials and prove it separates points, on the same model as `ContinuousMap/Polynomial.lean`. Prove the Stone-Weierstrass theorem and some variations for multivariate polynomials. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-topology new-contributor 285/1 Mathlib.lean,Mathlib/Topology/ContinuousMap/MvPolynomial.lean,Mathlib/Topology/ContinuousMap/StoneWeierstrass.lean 3 1 ['github-actions'] nobody
443-22870
1 year ago
443-22870
443 days ago
16-76141
16 days
18470 FR-vdash-bot
author:FR-vdash-bot
 perf: lower the priority of `Normed*.to*` instances --- From #7873. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict slow-typeclass-synthesis t-algebra t-analysis
label:t-algebra$
 28/0 Mathlib/Analysis/Normed/Field/Basic.lean,Mathlib/Analysis/Normed/Group/Basic.lean 2 9 ['astrainfinita', 'github-actions', 'jcommelin', 'leanprover-bot'] nobody
438-80697
1 year ago
438-80697
438 days ago
129-16341
129 days
8767 eric-wieser
author:eric-wieser
 refactor(Cache): tidy lake-manifest parsing in Cache This now respects local copies of Mathlib dependencies (though in practice these invalidate the *online* cache because to point to local copies of Mathlib, the hash for `lakefile.lean` and `lake-manifest.json` is first invalidated). --- - [x] depends on: #11492 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-meta 49/49 Cache/Hashing.lean,Cache/IO.lean,lake-manifest.json 3 8 ['digama0', 'eric-wieser', 'github-actions', 'leanprover-community-mathlib4-bot'] nobody
435-80429
1 year ago
617-46379
617 days ago
119-35643
119 days
22660 Ruben-VandeVelde
author:Ruben-VandeVelde
 chore: follow naming convention around Group.IsNilpotent --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-algebra
label:t-algebra$
 133/67 Mathlib/GroupTheory/Frattini.lean,Mathlib/GroupTheory/Nilpotent.lean,Mathlib/GroupTheory/SpecificGroups/ZGroup.lean 3 1 ['github-actions'] nobody
431-45125
1 year ago
431-45125
431 days ago
10-48025
10 days
21488 imbrem
author:imbrem
 feat(CategoryTheory/Monoidal): premonoidal categories Add support for premonoidal categories --- Still want to add support for: - Premonoidal braided/symmetric categories - The monoidal coherence theorem, which I've already ported in my `discretion` library - The `coherence` tactic, which should work fine for premonoidal categories too but wanted to get this in front of reviewers ASAP to make sure my general approach was alright [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-category-theory new-contributor 900/361 Mathlib/Algebra/Category/ModuleCat/Presheaf/Monoidal.lean,Mathlib/CategoryTheory/Bicategory/End.lean,Mathlib/CategoryTheory/GradedObject/Monoidal.lean,Mathlib/CategoryTheory/Localization/Monoidal.lean,Mathlib/CategoryTheory/Monoidal/Braided/Basic.lean,Mathlib/CategoryTheory/Monoidal/Category.lean,Mathlib/CategoryTheory/Monoidal/Center.lean,Mathlib/CategoryTheory/Monoidal/CoherenceLemmas.lean,Mathlib/CategoryTheory/Monoidal/Discrete.lean,Mathlib/CategoryTheory/Monoidal/End.lean,Mathlib/CategoryTheory/Monoidal/Free/Basic.lean,Mathlib/CategoryTheory/Monoidal/Functor.lean,Mathlib/CategoryTheory/Monoidal/FunctorCategory.lean,Mathlib/CategoryTheory/Monoidal/Mon_.lean,Mathlib/CategoryTheory/Monoidal/Opposite.lean,Mathlib/CategoryTheory/Monoidal/Transport.lean,Mathlib/Tactic/CategoryTheory/Monoidal/Datatypes.lean,Mathlib/Tactic/CategoryTheory/Monoidal/Normalize.lean,Mathlib/Tactic/CategoryTheory/Monoidal/PureCoherence.lean,Mathlib/Tactic/CategoryTheory/MonoidalComp.lean,MathlibTest/StringDiagram.lean 21 9 ['YaelDillies', 'github-actions', 'grunweg', 'imbrem', 'kim-em', 'leanprover-community-bot-assistant'] nobody
408-31272
1 year ago
408-31273
408 days ago
58-6026
58 days
21525 sinhp
author:sinhp
 feat(CategoryTheory): Locally Cartesian Closed Categories (Prelim) This PR defines the basic preliminaries for defining locally cartesian closed categories (LCCCs). In particular, using the calculus of mates we define certain natural isomorphisms involving `Over.star` and `Over.pullback` which will be crucial in defining the right adjoint to the pullback functor in the development of LCCCs. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-category-theory large-import 338/24 Mathlib/CategoryTheory/Comma/Over/Basic.lean,Mathlib/CategoryTheory/Comma/Over/Pullback.lean,Mathlib/CategoryTheory/Galois/Examples.lean 3 13 ['b-mehta', 'github-actions', 'joelriou', 'leanprover-community-bot-assistant', 'sinhp'] nobody
408-31270
1 year ago
408-31272
408 days ago
36-69400
36 days
16314 FR-vdash-bot
author:FR-vdash-bot
 chore(Data/Quot): deprecate `ind*'` APIs --- - [x] depends on: #16264 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-data 247/287 Counterexamples/CliffordAlgebraNotInjective.lean,Mathlib/Algebra/Colimit/Module.lean,Mathlib/Algebra/Lie/Quotient.lean,Mathlib/Algebra/Module/Torsion.lean,Mathlib/Algebra/RingQuot.lean,Mathlib/Analysis/SpecialFunctions/Trigonometric/Angle.lean,Mathlib/CategoryTheory/ConnectedComponents.lean,Mathlib/CategoryTheory/Subobject/Basic.lean,Mathlib/CategoryTheory/Subobject/FactorThru.lean,Mathlib/CategoryTheory/Subobject/Lattice.lean,Mathlib/Computability/Reduce.lean,Mathlib/Computability/Tape.lean,Mathlib/Data/List/Cycle.lean,Mathlib/Data/Multiset/MapFold.lean,Mathlib/Data/Multiset/ZeroCons.lean,Mathlib/Data/Quot.lean,Mathlib/Data/Setoid/Basic.lean,Mathlib/Data/Setoid/Partition.lean,Mathlib/FieldTheory/Fixed.lean,Mathlib/GroupTheory/Complement.lean,Mathlib/GroupTheory/Congruence/Basic.lean,Mathlib/GroupTheory/Congruence/Defs.lean,Mathlib/GroupTheory/Congruence/Hom.lean,Mathlib/GroupTheory/Coset/Basic.lean,Mathlib/GroupTheory/Coset/Defs.lean,Mathlib/GroupTheory/FreeAbelianGroup.lean,Mathlib/GroupTheory/GroupAction/Basic.lean,Mathlib/GroupTheory/GroupAction/Defs.lean,Mathlib/GroupTheory/GroupAction/Quotient.lean,Mathlib/GroupTheory/Index.lean,Mathlib/GroupTheory/MonoidLocalization/Basic.lean,Mathlib/GroupTheory/PGroup.lean,Mathlib/GroupTheory/Perm/Cycle/Concrete.lean,Mathlib/GroupTheory/PresentedGroup.lean,Mathlib/GroupTheory/QuotientGroup/Basic.lean,Mathlib/GroupTheory/QuotientGroup/Defs.lean,Mathlib/GroupTheory/SchurZassenhaus.lean,Mathlib/GroupTheory/Sylow.lean,Mathlib/LinearAlgebra/Alternating/DomCoprod.lean,Mathlib/LinearAlgebra/Projectivization/Basic.lean,Mathlib/LinearAlgebra/Quotient/Basic.lean,Mathlib/LinearAlgebra/Quotient/Defs.lean,Mathlib/MeasureTheory/Function/AEEqFun.lean,Mathlib/NumberTheory/Padics/PadicNumbers.lean,Mathlib/NumberTheory/RamificationInertia/Basic.lean,Mathlib/Order/Antisymmetrization.lean,Mathlib/Order/Category/PartOrd.lean,Mathlib/Order/Filter/Germ/Basic.lean,Mathlib/RepresentationTheory/GroupCohomology/Hilbert90.lean,Mathlib/RingTheory/AdicCompletion/Algebra.lean,Mathlib/RingTheory/AdicCompletion/Basic.lean,Mathlib/RingTheory/AdicCompletion/Functoriality.lean,Mathlib/RingTheory/AdjoinRoot.lean,Mathlib/RingTheory/Congruence/Basic.lean,Mathlib/RingTheory/Flat/FaithfullyFlat/Basic.lean,Mathlib/RingTheory/GradedAlgebra/HomogeneousLocalization.lean,Mathlib/RingTheory/Ideal/Cotangent.lean,Mathlib/RingTheory/Ideal/Norm/AbsNorm.lean,Mathlib/RingTheory/Ideal/Quotient/Basic.lean,Mathlib/RingTheory/Ideal/Quotient/Defs.lean,Mathlib/RingTheory/Ideal/Quotient/Operations.lean,Mathlib/RingTheory/Valuation/Quotient.lean,Mathlib/Topology/Algebra/Group/TopologicalAbelianization.lean,Mathlib/Topology/Algebra/InfiniteSum/Module.lean,Mathlib/Topology/Separation/Basic.lean 65 4 ['github-actions', 'leanprover-community-bot-assistant', 'mathlib4-dependent-issues-bot'] nobody
402-56236
1 year ago
402-56238
402 days ago
55-52030
55 days
15483 FR-vdash-bot
author:FR-vdash-bot
 chore(GroupTheory/Coset): reduce defeq abuse --- - [x] depends on: #15482 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-algebra
label:t-algebra$
 114/60 Mathlib/GroupTheory/Commensurable.lean,Mathlib/GroupTheory/Coset.lean,Mathlib/GroupTheory/QuotientGroup.lean,Mathlib/LinearAlgebra/Alternating/DomCoprod.lean,Mathlib/MeasureTheory/Measure/Haar/Quotient.lean,Mathlib/Topology/Algebra/Group/Compact.lean 6 14 ['astrainfinita', 'eric-wieser', 'github-actions', 'grunweg', 'leanprover-bot', 'leanprover-community-mathlib4-bot', 'mattrobball', 'mergify', 'urkud'] nobody
402-1129
1 year ago
650-39459
650 days ago
4-79214
4 days
16594 FR-vdash-bot
author:FR-vdash-bot
 perf: reorder `extends` and remove some instances in algebra hierarchy --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict slow-typeclass-synthesis t-algebra
label:t-algebra$
 240/92 Mathlib.lean,Mathlib/Algebra/Algebra/Hom.lean,Mathlib/Algebra/Associated/Basic.lean,Mathlib/Algebra/BigOperators/Ring/List.lean,Mathlib/Algebra/Field/Defs.lean,Mathlib/Algebra/GCDMonoid/Basic.lean,Mathlib/Algebra/Group/Defs.lean,Mathlib/Algebra/Group/Ext.lean,Mathlib/Algebra/Group/Opposite.lean,Mathlib/Algebra/Group/Prod.lean,Mathlib/Algebra/GroupWithZero/Defs.lean,Mathlib/Algebra/GroupWithZero/Prod.lean,Mathlib/Algebra/Homology/Embedding/Basic.lean,Mathlib/Algebra/Order/AddGroupWithTop.lean,Mathlib/Algebra/Order/Field/Canonical/Defs.lean,Mathlib/Algebra/Order/Field/Defs.lean,Mathlib/Algebra/Order/Group/Unbundled/Abs.lean,Mathlib/Algebra/Order/GroupWithZero/Canonical.lean,Mathlib/Algebra/Order/Ring/Canonical.lean,Mathlib/Algebra/Order/Ring/Defs.lean,Mathlib/Algebra/Polynomial/Roots.lean,Mathlib/Algebra/Quaternion.lean,Mathlib/Algebra/Ring/Defs.lean,Mathlib/Algebra/Ring/Ext.lean,Mathlib/Algebra/Ring/InjSurj.lean,Mathlib/Algebra/Ring/Rat.lean,Mathlib/Algebra/Ring/SumsOfSquares.lean,Mathlib/Algebra/Tropical/Basic.lean,Mathlib/Analysis/CStarAlgebra/ContinuousFunctionalCalculus/Order.lean,Mathlib/Analysis/InnerProductSpace/Symmetric.lean,Mathlib/CategoryTheory/Preadditive/FunctorCategory.lean,Mathlib/Data/Finset/NoncommProd.lean,Mathlib/Data/Int/Cast/Defs.lean,Mathlib/FieldTheory/IsAlgClosed/AlgebraicClosure.lean,Mathlib/FieldTheory/SplittingField/Construction.lean,Mathlib/GroupTheory/Congruence/Basic.lean,Mathlib/GroupTheory/MonoidLocalization/MonoidWithZero.lean,Mathlib/GroupTheory/Torsion.lean,Mathlib/LinearAlgebra/LinearPMap.lean,Mathlib/LinearAlgebra/TensorProduct/Basic.lean,Mathlib/Order/Filter/Germ/Basic.lean,Mathlib/Order/Interval/Finset/Box.lean,Mathlib/RingTheory/Bialgebra/Hom.lean,Mathlib/RingTheory/Coalgebra/Hom.lean,Mathlib/RingTheory/Ideal/Quotient.lean,Mathlib/RingTheory/Perfection.lean,Mathlib/RingTheory/TensorProduct/Basic.lean,Mathlib/RingTheory/TensorProduct/MvPolynomial.lean,Mathlib/Util/NoInstances.lean,scripts/noshake.json 50 8 ['astrainfinita', 'github-actions', 'grunweg', 'leanprover-bot'] nobody
402-905
1 year ago
606-40452
606 days ago
14-58900
14 days
23859 urkud
author:urkud
 feat(Topology/../Order/Field): generalize to `Semifield` .. from a linear ordered field to a linear ordered semifield--- - [ ] depends on: #23857 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-topology 245/219 Mathlib/Algebra/Order/Group/Pointwise/Interval.lean,Mathlib/Analysis/BoxIntegral/Box/SubboxInduction.lean,Mathlib/Topology/Algebra/Order/Field.lean,Mathlib/Topology/Order/Basic.lean 4 3 ['github-actions', 'leanprover-community-bot-assistant', 'mathlib4-dependent-issues-bot'] nobody
395-44146
1 year ago
408-54787
408 days ago
0-265
4 minutes
23810 b-reinke
author:b-reinke
 chore(Order/Interval): generalize succ/pred lemmas to partial orders Many lemmas in `Mathlib/Order/Interval/Set/SuccPred.lean`and `Mathlib/Order/Interval/Finset/SuccPred.lean` also work for partial orders. They are generalized in this PR by introducing different sections for `PartialOrder` and `LinearOrder` assumptions in the respective files. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-order 231/89 Mathlib/Order/Interval/Finset/SuccPred.lean,Mathlib/Order/Interval/Set/SuccPred.lean 2 2 ['github-actions', 'leanprover-community-bot-assistant'] nobody
393-20921
1 year ago
393-20923
393 days ago
16-29623
16 days
24285 madvorak
author:madvorak
 chore(Algebra/*-{Category,Homology}): remove unnecessary universe variables Discussions: https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/Call.20for.20help.3A.20technical.2F.20organisational.20debt/with/513620128 https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/Algebra.20and.20.60Type*.60/with/513558902 https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/Task.2026.3A.20Replace.20Type.20u.20by.20Type*.20wherever.20possible/with/513592993 --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-algebra
label:t-algebra$
 542/916 Mathlib/Algebra/AddTorsor/Basic.lean,Mathlib/Algebra/Algebra/Defs.lean,Mathlib/Algebra/Algebra/Equiv.lean,Mathlib/Algebra/Algebra/Field.lean,Mathlib/Algebra/Algebra/Hom.lean,Mathlib/Algebra/Algebra/Operations.lean,Mathlib/Algebra/Algebra/Spectrum/Basic.lean,Mathlib/Algebra/Algebra/Subalgebra/Lattice.lean,Mathlib/Algebra/Algebra/Subalgebra/Tower.lean,Mathlib/Algebra/Algebra/Tower.lean,Mathlib/Algebra/Central/Basic.lean,Mathlib/Algebra/Central/Defs.lean,Mathlib/Algebra/Central/TensorProduct.lean,Mathlib/Algebra/CharP/Pi.lean,Mathlib/Algebra/CharP/Quotient.lean,Mathlib/Algebra/CharP/Subring.lean,Mathlib/Algebra/DirectSum/Algebra.lean,Mathlib/Algebra/DirectSum/Basic.lean,Mathlib/Algebra/DirectSum/Finsupp.lean,Mathlib/Algebra/DirectSum/Module.lean,Mathlib/Algebra/EuclideanDomain/Basic.lean,Mathlib/Algebra/EuclideanDomain/Defs.lean,Mathlib/Algebra/Field/Basic.lean,Mathlib/Algebra/Field/Defs.lean,Mathlib/Algebra/Field/IsField.lean,Mathlib/Algebra/Field/MinimalAxioms.lean,Mathlib/Algebra/Field/Subfield/Basic.lean,Mathlib/Algebra/Field/Subfield/Defs.lean,Mathlib/Algebra/FreeNonUnitalNonAssocAlgebra.lean,Mathlib/Algebra/Group/Conj.lean,Mathlib/Algebra/Group/Defs.lean,Mathlib/Algebra/Group/Equiv/Finite.lean,Mathlib/Algebra/Group/Ext.lean,Mathlib/Algebra/Group/Hom/End.lean,Mathlib/Algebra/Group/Hom/Instances.lean,Mathlib/Algebra/Group/Invertible/Basic.lean,Mathlib/Algebra/Group/Invertible/Defs.lean,Mathlib/Algebra/Group/Pi/Basic.lean,Mathlib/Algebra/Group/Pi/Lemmas.lean,Mathlib/Algebra/Group/TypeTags/Basic.lean,Mathlib/Algebra/Group/TypeTags/Finite.lean,Mathlib/Algebra/Group/TypeTags/Hom.lean,Mathlib/Algebra/Group/Units/Basic.lean,Mathlib/Algebra/Group/Units/Defs.lean,Mathlib/Algebra/Group/Units/Hom.lean,Mathlib/Algebra/Group/WithOne/Basic.lean,Mathlib/Algebra/Group/WithOne/Defs.lean,Mathlib/Algebra/GroupWithZero/Action/Pi.lean,Mathlib/Algebra/GroupWithZero/Defs.lean,Mathlib/Algebra/GroupWithZero/Invertible.lean,Mathlib/Algebra/GroupWithZero/NeZero.lean,Mathlib/Algebra/Lie/Abelian.lean,Mathlib/Algebra/Lie/Basic.lean,Mathlib/Algebra/Lie/CartanMatrix.lean,Mathlib/Algebra/Lie/CartanSubalgebra.lean,Mathlib/Algebra/Lie/Character.lean,Mathlib/Algebra/Lie/Classical.lean,Mathlib/Algebra/Lie/DirectSum.lean,Mathlib/Algebra/Lie/Free.lean,Mathlib/Algebra/Lie/Ideal.lean,Mathlib/Algebra/Lie/IdealOperations.lean,Mathlib/Algebra/Lie/Matrix.lean,Mathlib/Algebra/Lie/Nilpotent.lean,Mathlib/Algebra/Lie/NonUnitalNonAssocAlgebra.lean,Mathlib/Algebra/Lie/OfAssociative.lean,Mathlib/Algebra/Lie/Quotient.lean,Mathlib/Algebra/Lie/SkewAdjoint.lean,Mathlib/Algebra/Lie/Solvable.lean,Mathlib/Algebra/Lie/Subalgebra.lean,Mathlib/Algebra/Lie/Submodule.lean,Mathlib/Algebra/Lie/TensorProduct.lean,Mathlib/Algebra/Lie/UniversalEnveloping.lean,Mathlib/Algebra/Module/Basic.lean,Mathlib/Algebra/Module/CharacterModule.lean,Mathlib/Algebra/Module/DedekindDomain.lean,Mathlib/Algebra/Module/Defs.lean,Mathlib/Algebra/Module/End.lean,Mathlib/Algebra/Module/Equiv/Opposite.lean,Mathlib/Algebra/Module/Lattice.lean,Mathlib/Algebra/Module/LinearMap/Basic.lean,Mathlib/Algebra/Module/LinearMap/Defs.lean,Mathlib/Algebra/Module/LinearMap/End.lean,Mathlib/Algebra/Module/LocalizedModule/Basic.lean,Mathlib/Algebra/Module/MinimalAxioms.lean,Mathlib/Algebra/Module/NatInt.lean,Mathlib/Algebra/Module/Opposite.lean,Mathlib/Algebra/Module/Pi.lean,Mathlib/Algebra/Module/Presentation/Differentials.lean,Mathlib/Algebra/Module/Presentation/Tensor.lean,Mathlib/Algebra/Module/Rat.lean,Mathlib/Algebra/Module/RingHom.lean,Mathlib/Algebra/Module/Submodule/Basic.lean,Mathlib/Algebra/Module/Torsion.lean,Mathlib/Algebra/MonoidAlgebra/Basic.lean,Mathlib/Algebra/MonoidAlgebra/Defs.lean,Mathlib/Algebra/MonoidAlgebra/Support.lean,Mathlib/Algebra/MvPolynomial/Basic.lean,Mathlib/Algebra/MvPolynomial/CommRing.lean,Mathlib/Algebra/MvPolynomial/Degrees.lean,Mathlib/Algebra/MvPolynomial/Equiv.lean 182 22 ['erdOne', 'github-actions', 'leanprover-bot', 'leanprover-community-bot-assistant', 'madvorak', 'mattrobball'] nobody
393-9618
1 year ago
393-9619
393 days ago
2-11655
2 days
23349 BGuillemet
author:BGuillemet
 feat: add LocallyLipschitzOn.lipschitzOnWith_of_isCompact and two small lemmas about Lipschitz functions Main feat (in Mathlib/Topology/EMetricSpace/Basic.lean): if a function `f` from an extended pseudometric space to a pseudometric space is locally Lipschitz on a compact subset `s`, then `f` is Lipschitz on `s`. The theorem is true only when the codomain of `f` is a pseudometric space, so it needs imports from Mathlib/Topology/MetricSpace. Other small feat (in Mathlib/Analysis/Calculus/ContDiff/RCLike.lean): a function that is continuously differentiable on an open subset is locally Lipschitz on this subset. --- - [ ] depends on: #22890 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-topology large-import new-contributor 59/4 Mathlib/Analysis/Calculus/ContDiff/RCLike.lean,Mathlib/Topology/EMetricSpace/Lipschitz.lean 2 4 ['github-actions', 'leanprover-community-bot-assistant', 'mathlib4-dependent-issues-bot'] PatrickMassot
assignee:PatrickMassot
360-16368
11 months ago
360-16370
360 days ago
35-30364
35 days
16020 adomani
author:adomani
 feat: compare PR `olean`s size with `master` Adds two CI steps: * `print the sizes of the oleans` that prints the sizes of all the folders containing `Mathlib` `.olean`s; * `compare oleans` that compares the sizes of the previous step with the corresponding sizes on `master`. In the test runs, the two steps have taken at most 3 seconds combined (the first is virtually instantaneous, the second one depends on `curl` to find a job id and on `gh` to retrieve the logs of a previous CI run -- everything else appears to be negligible). This hopefully helps finding out if some PR is bloating up the `.olean`s. See [this Zulip discussion](https://leanprover.zulipchat.com/#narrow/stream/287929-mathlib4/topic/Error.3A.20No.20space.20left.20on.20device/near/463792355) for a PR of mine that prompted this check. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict CI 120/0 .github/build.in.yml,.github/workflows/bors.yml,.github/workflows/build.yml,.github/workflows/build_fork.yml,scripts/olean_comparison.sh 5 50 ['Vtec234', 'YaelDillies', 'adomani', 'bryangingechen', 'github-actions', 'grunweg', 'kim-em', 'leanprover-community-bot-assistant', 'mattrobball'] nobody
350-66375
11 months ago
548-27397
548 days ago
87-65841
87 days
25340 dupuisf
author:dupuisf
 chore(Analysis/Convex): move files pertaining to convex/concave functions to their own folder This PR creates a new folder under `Analysis/Convex` called `Analysis/Convex/Function`, which includes files that are mostly or entirely about convex/concave functions (as opposed to convex sets). --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-convex-geometry 4264/4155 Mathlib.lean,Mathlib/Analysis/Convex/Continuous.lean,Mathlib/Analysis/Convex/Deriv.lean,Mathlib/Analysis/Convex/Exposed.lean,Mathlib/Analysis/Convex/Extrema.lean,Mathlib/Analysis/Convex/Function.lean,Mathlib/Analysis/Convex/Function/Basic.lean,Mathlib/Analysis/Convex/Function/Continuous.lean,Mathlib/Analysis/Convex/Function/Deriv.lean,Mathlib/Analysis/Convex/Function/Extrema.lean,Mathlib/Analysis/Convex/Function/Integral.lean,Mathlib/Analysis/Convex/Function/Jensen.lean,Mathlib/Analysis/Convex/Function/Mul.lean,Mathlib/Analysis/Convex/Function/Piecewise.lean,Mathlib/Analysis/Convex/Function/Quasiconvex.lean,Mathlib/Analysis/Convex/Function/Slope.lean,Mathlib/Analysis/Convex/Function/Strong.lean,Mathlib/Analysis/Convex/Integral.lean,Mathlib/Analysis/Convex/Jensen.lean,Mathlib/Analysis/Convex/Mul.lean,Mathlib/Analysis/Convex/Piecewise.lean,Mathlib/Analysis/Convex/Quasiconvex.lean,Mathlib/Analysis/Convex/Slope.lean,Mathlib/Analysis/Convex/SpecificFunctions/Basic.lean,Mathlib/Analysis/Convex/SpecificFunctions/Deriv.lean,Mathlib/Analysis/Convex/Strong.lean,Mathlib/Analysis/MeanInequalities.lean,Mathlib/Analysis/MeanInequalitiesPow.lean,Mathlib/Analysis/Normed/Module/Convex.lean,Mathlib/Analysis/Seminorm.lean,Mathlib/Analysis/SpecialFunctions/Log/NegMulLog.lean,Mathlib/Analysis/SpecialFunctions/Pochhammer.lean,Mathlib/MeasureTheory/Measure/Decomposition/IntegralRNDeriv.lean,Mathlib/NumberTheory/Harmonic/GammaDeriv.lean 34 2 ['github-actions', 'leanprover-community-bot-assistant'] nobody
349-39195
11 months ago
349-39197
349 days ago
6-38644
6 days
18441 ADedecker
author:ADedecker
 refactor(AdicTopology): use new API for algebraic filter bases, and factor some code --- - [x] depends on: #18437 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-topology t-algebra
label:t-algebra$
 847/159 Mathlib.lean,Mathlib/Topology/Algebra/FilterBasis.lean,Mathlib/Topology/Algebra/FilterBasisNew.lean,Mathlib/Topology/Algebra/Nonarchimedean/AdicTopology.lean,Mathlib/Topology/Algebra/Nonarchimedean/Bases.lean,Mathlib/Topology/Algebra/Nonarchimedean/BasesNew.lean 6 3 ['ADedecker', 'github-actions', 'mathlib4-dependent-issues-bot'] nobody
337-30936
11 months ago
569-28835
569 days ago
0-679
11 minutes
18439 ADedecker
author:ADedecker
 refactor: use new algebraic filter bases API in `FiniteAdeleRing` --- - [x] depends on: #18437 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-topology t-algebra
label:t-algebra$
 699/21 Mathlib.lean,Mathlib/RingTheory/DedekindDomain/FiniteAdeleRing.lean,Mathlib/Topology/Algebra/FilterBasis.lean,Mathlib/Topology/Algebra/FilterBasisNew.lean,Mathlib/Topology/Algebra/Nonarchimedean/Bases.lean,Mathlib/Topology/Algebra/Nonarchimedean/BasesNew.lean 6 2 ['github-actions', 'mathlib4-dependent-issues-bot'] nobody
337-30934
11 months ago
569-30478
569 days ago
0-619
10 minutes
18438 ADedecker
author:ADedecker
 refactor: adapt `KrullTopology` to the new algebraic filter bases API --- - [x] depends on: #18437 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-topology t-algebra
label:t-algebra$
 771/168 Mathlib.lean,Mathlib/FieldTheory/KrullTopology.lean,Mathlib/Topology/Algebra/FilterBasis.lean,Mathlib/Topology/Algebra/FilterBasisNew.lean,Mathlib/Topology/Algebra/Nonarchimedean/Bases.lean,Mathlib/Topology/Algebra/Nonarchimedean/BasesNew.lean 6 5 ['ADedecker', 'AntoineChambert-Loir', 'github-actions', 'mathlib4-dependent-issues-bot'] nobody
337-30933
11 months ago
569-31120
569 days ago
0-638
10 minutes
13964 pechersky
author:pechersky
 feat(Data/DigitExpansion): begin defining variant of reals without rationals Based on a de Bruijn 1976 paper. This file is just the basic definition of a digit expansion. Will be followed up with further constructions. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-data 518/0 Mathlib.lean,Mathlib/Data/DigitExpansion/Defs.lean,docs/references.bib 3 11 ['eric-wieser', 'github-actions', 'kim-em', 'pechersky'] dupuisf
assignee:dupuisf
334-13224
11 months ago
572-39440
572 days ago
129-57999
129 days
24823 eric-wieser
author:eric-wieser
 refactor: add `hom` lemmas for the `MonoidalCategory` structure on `ModuleCat` --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-algebra
label:t-algebra$
 148/164 Mathlib/Algebra/Category/FGModuleCat/Basic.lean,Mathlib/Algebra/Category/ModuleCat/Adjunctions.lean,Mathlib/Algebra/Category/ModuleCat/Monoidal/Basic.lean,Mathlib/Algebra/Category/ModuleCat/Monoidal/Closed.lean,Mathlib/Algebra/Category/ModuleCat/Monoidal/Symmetric.lean,Mathlib/Algebra/Category/ModuleCat/Presheaf/Free.lean,Mathlib/Algebra/Category/ModuleCat/Presheaf/Generator.lean,Mathlib/Algebra/Category/ModuleCat/Presheaf/Monoidal.lean,Mathlib/CategoryTheory/Monoidal/Internal/Module.lean,Mathlib/RepresentationTheory/Coinvariants.lean,Mathlib/RepresentationTheory/Rep.lean 11 21 ['101damnations', 'YaelDillies', 'eric-wieser', 'github-actions', 'joelriou', 'kbuzzard', 'leanprover-community-bot-assistant'] 101damnations
assignee:101damnations
321-64284
10 months ago
321-64284
321 days ago
37-56728
37 days
25071 erdOne
author:erdOne
 feat(EllipticCurve): basic API for singular cubics --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-algebraic-geometry 320/0 Mathlib.lean,Mathlib/AlgebraicGeometry/EllipticCurve/Singular/Basic.lean,Mathlib/AlgebraicGeometry/EllipticCurve/VariableChange.lean 3 35 ['Multramate', 'acmepjz', 'erdOne', 'github-actions', 'leanprover-community-bot-assistant'] nobody
321-64038
10 months ago
321-64039
321 days ago
45-4165
45 days
25988 Multramate
author:Multramate
 refactor(AlgebraicGeometry/EllipticCurve/*): replace Fin 3 with products This PR continues the work from #24593. Original PR: https://github.com/leanprover-community/mathlib4/pull/24593 merge-conflict t-algebraic-geometry 1000/1022 Mathlib/AlgebraicGeometry/EllipticCurve/Jacobian/Basic.lean,Mathlib/AlgebraicGeometry/EllipticCurve/Jacobian/Formula.lean,Mathlib/AlgebraicGeometry/EllipticCurve/Jacobian/Point.lean,Mathlib/AlgebraicGeometry/EllipticCurve/Projective/Basic.lean,Mathlib/AlgebraicGeometry/EllipticCurve/Projective/Formula.lean,Mathlib/AlgebraicGeometry/EllipticCurve/Projective/Point.lean 6 3 ['Multramate', 'github-actions', 'leanprover-community-bot-assistant'] nobody
321-63726
10 months ago
321-63726
321 days ago
18-21880
18 days
26067 mapehe
author:mapehe
 feat(Topology/StoneCech): exists_continuous_surjection_from_StoneCech_to_dense_range This lemma formalises the following version of the maximality property of the Stone–Čech compactification: If `f : α → β` is a continuous map from a topological space `α` to a Hausdorff space `β` with dense range, then there exists a continuous surjection from `StoneCech α` to `β` extending `f`. In particular, `StoneCech α` is the “largest” compact Hausdorff space into which `α` densely embeds, in the sense that any other such space is a continuous image of it. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-topology 18/0 Mathlib/Topology/StoneCech.lean 1 2 ['github-actions', 'leanprover-community-bot-assistant'] nobody
318-45104
10 months ago
318-45104
318 days ago
20-8582
20 days
25238 Hagb
author:Hagb
 feat(Tactic/ComputeDegree): add support for scalar multiplication with different types It would be able to deal with `a • (X : R[X])` where `a : S` is in a different type `S` with `[SMulZeroClass S R]`. --- - [x] depends on: #25237 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-meta new-contributor 17/5 Mathlib/Tactic/ComputeDegree.lean,MathlibTest/ComputeDegree.lean 2 3 ['github-actions', 'leanprover-community-bot-assistant', 'mathlib4-dependent-issues-bot'] nobody
291-42366
9 months ago
321-64035
321 days ago
38-26044
38 days
18646 jxjwan
author:jxjwan
 feat(RingTheory): isotypic components --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-ring-theory new-contributor 308/0 Mathlib/Order/CompactlyGenerated/Basic.lean,Mathlib/RingTheory/Isotypic.lean,Mathlib/RingTheory/SimpleModule.lean 3 1 ['github-actions'] nobody
290-44387
9 months ago
543-37980
543 days ago
20-16585
20 days
26200 adomani
author:adomani
 fix: add label when landrun fails Adds the `permission-denied` label on PRs that get blocked by landrun. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict CI 68/8 .github/build.in.yml,.github/workflows/bors.yml,.github/workflows/build.yml,.github/workflows/build_fork.yml 4 2 ['github-actions', 'mathlib4-merge-conflict-bot'] nobody
289-79719
9 months ago
289-79719
289 days ago
46-52210
46 days
27451 kckennylau
author:kckennylau
 feat(RingTheory/Valuation): define ball, closed ball, and sphere *From the 2025 Local Class Field Theory Workshop.* --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-ring-theory 27/0 Mathlib/RingTheory/Valuation/Basic.lean 1 13 ['JovanGerb', 'github-actions', 'kckennylau', 'mathlib4-merge-conflict-bot', 'pechersky', 'wwylele'] nobody
284-25822
9 months ago
284-25823
284 days ago
17-52359
17 days
27987 kckennylau
author:kckennylau
 feat(RingTheory/Valuation): define ball, closed ball, and sphere --- The pullback PR of #26827 and #27451. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-ring-theory large-import 73/0 Mathlib/RingTheory/Valuation/Basic.lean 1 4 ['JovanGerb', 'github-actions', 'kckennylau', 'mathlib4-merge-conflict-bot'] nobody
284-25451
9 months ago
284-25452
284 days ago
6-6455
6 days
27003 eric-wieser
author:eric-wieser
 chore: use `Simp.ResultQ` more often Also uses `~q` in place of manual `isDefEq` matching. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-meta 18/22 Mathlib/Tactic/NormNum/Core.lean,Mathlib/Tactic/NormNum/Result.lean,Mathlib/Tactic/ReduceModChar.lean 3 7 ['JovanGerb', 'eric-wieser', 'github-actions', 'mathlib4-merge-conflict-bot'] JovanGerb
assignee:JovanGerb
282-40075
9 months ago
282-40076
282 days ago
32-70098
32 days
25401 digama0
author:digama0
 feat(Util): SuppressSorry option See also leanprover/lean4#8611 and [#lean4 > Silent sorry @ 💬](https://leanprover.zulipchat.com/#narrow/channel/270676-lean4/topic/Silent.20sorry/near/503537964). This is a stop-gap solution while leanprover/lean4#8611 is underway, but it works about as well as any other built in option. Hooking declaration elaborators turns out to be a very powerful technique. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-meta 342/0 Mathlib.lean,Mathlib/Util/CommandElabHook.lean,Mathlib/Util/SuppressSorry.lean,MathlibTest/suppressSorry.lean 4 15 ['digama0', 'eric-wieser', 'github-actions', 'mathlib4-merge-conflict-bot'] alexjbest
assignee:alexjbest
281-81271
9 months ago
281-81271
281 days ago
71-27957
71 days
28622 alreadydone
author:alreadydone
 chore(Mathlib): replace `=>` by `↦` --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict 51792/51792 Mathlib/Algebra/AddTorsor/Basic.lean,Mathlib/Algebra/AddTorsor/Defs.lean,Mathlib/Algebra/Algebra/Basic.lean,Mathlib/Algebra/Algebra/Bilinear.lean,Mathlib/Algebra/Algebra/Defs.lean,Mathlib/Algebra/Algebra/Equiv.lean,Mathlib/Algebra/Algebra/Hom.lean,Mathlib/Algebra/Algebra/Hom/Rat.lean,Mathlib/Algebra/Algebra/NonUnitalHom.lean,Mathlib/Algebra/Algebra/NonUnitalSubalgebra.lean,Mathlib/Algebra/Algebra/Operations.lean,Mathlib/Algebra/Algebra/Opposite.lean,Mathlib/Algebra/Algebra/Prod.lean,Mathlib/Algebra/Algebra/Rat.lean,Mathlib/Algebra/Algebra/Spectrum/Basic.lean,Mathlib/Algebra/Algebra/Spectrum/Pi.lean,Mathlib/Algebra/Algebra/Spectrum/Quasispectrum.lean,Mathlib/Algebra/Algebra/Subalgebra/Basic.lean,Mathlib/Algebra/Algebra/Subalgebra/Centralizer.lean,Mathlib/Algebra/Algebra/Subalgebra/Directed.lean,Mathlib/Algebra/Algebra/Subalgebra/IsSimpleOrder.lean,Mathlib/Algebra/Algebra/Subalgebra/Lattice.lean,Mathlib/Algebra/Algebra/Subalgebra/Matrix.lean,Mathlib/Algebra/Algebra/Subalgebra/Operations.lean,Mathlib/Algebra/Algebra/Subalgebra/Pointwise.lean,Mathlib/Algebra/Algebra/Subalgebra/Prod.lean,Mathlib/Algebra/Algebra/Subalgebra/Unitization.lean,Mathlib/Algebra/Algebra/Tower.lean,Mathlib/Algebra/Algebra/TransferInstance.lean,Mathlib/Algebra/Algebra/Unitization.lean,Mathlib/Algebra/Algebra/ZMod.lean,Mathlib/Algebra/AlgebraicCard.lean,Mathlib/Algebra/BigOperators/Associated.lean,Mathlib/Algebra/BigOperators/Expect.lean,Mathlib/Algebra/BigOperators/Fin.lean,Mathlib/Algebra/BigOperators/Finprod.lean,Mathlib/Algebra/BigOperators/Finsupp/Basic.lean,Mathlib/Algebra/BigOperators/Finsupp/Fin.lean,Mathlib/Algebra/BigOperators/Group/Finset/Basic.lean,Mathlib/Algebra/BigOperators/Group/Finset/Defs.lean,Mathlib/Algebra/BigOperators/Group/Finset/Piecewise.lean,Mathlib/Algebra/BigOperators/Group/Finset/Sigma.lean,Mathlib/Algebra/BigOperators/Group/List/Basic.lean,Mathlib/Algebra/BigOperators/Group/List/Defs.lean,Mathlib/Algebra/BigOperators/Group/List/Lemmas.lean,Mathlib/Algebra/BigOperators/Group/Multiset/Basic.lean,Mathlib/Algebra/BigOperators/Group/Multiset/Defs.lean,Mathlib/Algebra/BigOperators/GroupWithZero/Finset.lean,Mathlib/Algebra/BigOperators/Intervals.lean,Mathlib/Algebra/BigOperators/Option.lean,Mathlib/Algebra/BigOperators/Pi.lean,Mathlib/Algebra/BigOperators/Ring/Finset.lean,Mathlib/Algebra/BigOperators/Ring/Multiset.lean,Mathlib/Algebra/Category/AlgCat/Basic.lean,Mathlib/Algebra/Category/AlgCat/Limits.lean,Mathlib/Algebra/Category/AlgCat/Monoidal.lean,Mathlib/Algebra/Category/BialgCat/Basic.lean,Mathlib/Algebra/Category/BoolRing.lean,Mathlib/Algebra/Category/CoalgCat/Basic.lean,Mathlib/Algebra/Category/CoalgCat/ComonEquivalence.lean,Mathlib/Algebra/Category/FGModuleCat/Limits.lean,Mathlib/Algebra/Category/Grp/AB.lean,Mathlib/Algebra/Category/Grp/Adjunctions.lean,Mathlib/Algebra/Category/Grp/Basic.lean,Mathlib/Algebra/Category/Grp/Biproducts.lean,Mathlib/Algebra/Category/Grp/CartesianMonoidal.lean,Mathlib/Algebra/Category/Grp/Colimits.lean,Mathlib/Algebra/Category/Grp/EpiMono.lean,Mathlib/Algebra/Category/Grp/FilteredColimits.lean,Mathlib/Algebra/Category/Grp/Images.lean,Mathlib/Algebra/Category/Grp/Kernels.lean,Mathlib/Algebra/Category/Grp/LargeColimits.lean,Mathlib/Algebra/Category/Grp/LeftExactFunctor.lean,Mathlib/Algebra/Category/Grp/Limits.lean,Mathlib/Algebra/Category/Grp/Preadditive.lean,Mathlib/Algebra/Category/Grp/ZModuleEquivalence.lean,Mathlib/Algebra/Category/Grp/Zero.lean,Mathlib/Algebra/Category/GrpWithZero.lean,Mathlib/Algebra/Category/HopfAlgCat/Basic.lean,Mathlib/Algebra/Category/ModuleCat/Adjunctions.lean,Mathlib/Algebra/Category/ModuleCat/Basic.lean,Mathlib/Algebra/Category/ModuleCat/Biproducts.lean,Mathlib/Algebra/Category/ModuleCat/ChangeOfRings.lean,Mathlib/Algebra/Category/ModuleCat/Colimits.lean,Mathlib/Algebra/Category/ModuleCat/EpiMono.lean,Mathlib/Algebra/Category/ModuleCat/FilteredColimits.lean,Mathlib/Algebra/Category/ModuleCat/Images.lean,Mathlib/Algebra/Category/ModuleCat/Injective.lean,Mathlib/Algebra/Category/ModuleCat/Kernels.lean,Mathlib/Algebra/Category/ModuleCat/Limits.lean,Mathlib/Algebra/Category/ModuleCat/Monoidal/Basic.lean,Mathlib/Algebra/Category/ModuleCat/Monoidal/Closed.lean,Mathlib/Algebra/Category/ModuleCat/Monoidal/Symmetric.lean,Mathlib/Algebra/Category/ModuleCat/Presheaf.lean,Mathlib/Algebra/Category/ModuleCat/Presheaf/Abelian.lean,Mathlib/Algebra/Category/ModuleCat/Presheaf/Colimits.lean,Mathlib/Algebra/Category/ModuleCat/Presheaf/Limits.lean,Mathlib/Algebra/Category/ModuleCat/Presheaf/Pushforward.lean,Mathlib/Algebra/Category/ModuleCat/Presheaf/Sheafify.lean,Mathlib/Algebra/Category/ModuleCat/Products.lean 3838 4 ['github-actions', 'mathlib4-merge-conflict-bot'] nobody
275-84751
9 months ago
275-84752
275 days ago
0-62065
17 hours
28626 alreadydone
author:alreadydone
 chore(Archive, Counterexamples): replace => by ↦ --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict 288/288 Archive/Arithcc.lean,Archive/Examples/IfNormalization/Result.lean,Archive/Examples/IfNormalization/WithoutAesop.lean,Archive/Examples/PropEncodable.lean,Archive/Imo/Imo1959Q1.lean,Archive/Imo/Imo1960Q1.lean,Archive/Imo/Imo1962Q4.lean,Archive/Imo/Imo1972Q5.lean,Archive/Imo/Imo1977Q6.lean,Archive/Imo/Imo1981Q3.lean,Archive/Imo/Imo1987Q1.lean,Archive/Imo/Imo1988Q6.lean,Archive/Imo/Imo1994Q1.lean,Archive/Imo/Imo1998Q2.lean,Archive/Imo/Imo2001Q2.lean,Archive/Imo/Imo2006Q3.lean,Archive/Imo/Imo2006Q5.lean,Archive/Imo/Imo2008Q2.lean,Archive/Imo/Imo2008Q4.lean,Archive/Imo/Imo2011Q3.lean,Archive/Imo/Imo2013Q1.lean,Archive/Imo/Imo2019Q1.lean,Archive/Imo/Imo2024Q5.lean,Archive/MiuLanguage/Basic.lean,Archive/MiuLanguage/DecisionSuf.lean,Archive/OxfordInvariants/Summer2021/Week3P1.lean,Archive/Sensitivity.lean,Archive/Wiedijk100Theorems/AbelRuffini.lean,Archive/Wiedijk100Theorems/AreaOfACircle.lean,Archive/Wiedijk100Theorems/AscendingDescendingSequences.lean,Archive/Wiedijk100Theorems/BallotProblem.lean,Archive/Wiedijk100Theorems/BirthdayProblem.lean,Archive/Wiedijk100Theorems/BuffonsNeedle.lean,Archive/Wiedijk100Theorems/CubingACube.lean,Archive/Wiedijk100Theorems/FriendshipGraphs.lean,Archive/Wiedijk100Theorems/Konigsberg.lean,Archive/Wiedijk100Theorems/Partition.lean,Archive/Wiedijk100Theorems/SumOfPrimeReciprocalsDiverges.lean,Archive/ZagierTwoSquares.lean,Counterexamples/AharoniKorman.lean,Counterexamples/CanonicallyOrderedCommSemiringTwoMul.lean,Counterexamples/CharPZeroNeCharZero.lean,Counterexamples/CliffordAlgebraNotInjective.lean,Counterexamples/DirectSumIsInternal.lean,Counterexamples/GameMultiplication.lean,Counterexamples/Girard.lean,Counterexamples/HomogeneousPrimeNotPrime.lean,Counterexamples/MapFloor.lean,Counterexamples/MonicNonRegular.lean,Counterexamples/Phillips.lean,Counterexamples/Pseudoelement.lean,Counterexamples/QuadraticForm.lean,Counterexamples/SorgenfreyLine.lean,Counterexamples/ZeroDivisorsInAddMonoidAlgebras.lean 54 2 ['github-actions', 'mathlib4-merge-conflict-bot'] nobody
274-27477
9 months ago
274-27478
274 days ago
2-47136
2 days
27403 MoritzBeroRoos
author:MoritzBeroRoos
 fix: replace probably erroneous usage of ⬝ (with old \cdot) by · (with \centerdot) Discussion at [zulip](https://leanprover.zulipchat.com/#narrow/channel/270676-lean4/topic/.5Ccdot.20!.3D.20.5Ccenterdot). Currently the abbreviations \cdot and \centerdot resolve to different, with the naked eye nearly undistinguishable symbols (despite the c in cdot surely standing for center..). This pr replaces instances of ⬝ where · was probably meant. All of the replacement is in comments, except for the file bench_summary.lean which is used for priting the github benchmark results. Since this file is about scientific notation of numbers, sure · was meant to be used, not a rectangle. [Related](https://github.com/leanprover-community/mathlib4/pull/27399) --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict new-contributor 195/195 Mathlib/Algebra/ContinuedFractions/Computation/Approximations.lean,Mathlib/Algebra/DirectSum/Idempotents.lean,Mathlib/Algebra/Lie/Derivation/Basic.lean,Mathlib/Algebra/Module/Equiv/Basic.lean,Mathlib/AlgebraicGeometry/EllipticCurve/DivisionPolynomial/Basic.lean,Mathlib/Analysis/Analytic/Constructions.lean,Mathlib/Analysis/CStarAlgebra/CStarMatrix.lean,Mathlib/Analysis/Calculus/ContDiff/Basic.lean,Mathlib/Analysis/Calculus/ContDiff/Bounds.lean,Mathlib/Analysis/Calculus/FDeriv/Symmetric.lean,Mathlib/Analysis/Fourier/FourierTransformDeriv.lean,Mathlib/Analysis/InnerProductSpace/Dual.lean,Mathlib/Analysis/InnerProductSpace/PiL2.lean,Mathlib/Analysis/Normed/Unbundled/InvariantExtension.lean,Mathlib/Analysis/SpecialFunctions/Complex/CircleAddChar.lean,Mathlib/Combinatorics/Configuration.lean,Mathlib/Combinatorics/SimpleGraph/AdjMatrix.lean,Mathlib/Combinatorics/SimpleGraph/LapMatrix.lean,Mathlib/Data/Matrix/Block.lean,Mathlib/Data/Matrix/ConjTranspose.lean,Mathlib/Data/Matrix/Hadamard.lean,Mathlib/Data/Matrix/Mul.lean,Mathlib/Data/Matrix/Notation.lean,Mathlib/Data/Matrix/Reflection.lean,Mathlib/Data/Matrix/RowCol.lean,Mathlib/Data/Matrix/Vec.lean,Mathlib/FieldTheory/PurelyInseparable/PerfectClosure.lean,Mathlib/Geometry/Manifold/GroupLieAlgebra.lean,Mathlib/GroupTheory/Coxeter/Matrix.lean,Mathlib/LinearAlgebra/CrossProduct.lean,Mathlib/LinearAlgebra/Matrix/BilinearForm.lean,Mathlib/LinearAlgebra/Matrix/DotProduct.lean,Mathlib/LinearAlgebra/Matrix/Nondegenerate.lean,Mathlib/LinearAlgebra/Matrix/Orthogonal.lean,Mathlib/LinearAlgebra/Matrix/PosDef.lean,Mathlib/LinearAlgebra/Matrix/SchurComplement.lean,Mathlib/LinearAlgebra/Matrix/SesquilinearForm.lean,Mathlib/LinearAlgebra/Matrix/Trace.lean,Mathlib/LinearAlgebra/Multilinear/Basic.lean,Mathlib/LinearAlgebra/PerfectPairing/Matrix.lean,Mathlib/LinearAlgebra/Projectivization/Constructions.lean,Mathlib/NumberTheory/NumberField/ProductFormula.lean,Mathlib/NumberTheory/SiegelsLemma.lean,Mathlib/RingTheory/DividedPowers/SubDPIdeal.lean,Mathlib/SetTheory/Ordinal/Veblen.lean,Mathlib/Topology/Algebra/Module/Equiv.lean,Mathlib/Topology/Homeomorph/Lemmas.lean,Mathlib/Topology/Instances/Matrix.lean,scripts/bench_summary.lean 49 5 ['eric-wieser', 'github-actions', 'grunweg', 'leanprover-community-bot-assistant'] nobody
272-60513
8 months ago
295-36435
295 days ago
7-54661
7 days
28042 kckennylau
author:kckennylau
 feat(Topology/ValuativeRel): a topological basis indexed by pairs of elements --- The pullback PR of #27314 and #27163. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-ring-theory 140/23 Mathlib/RingTheory/Valuation/ValuativeRel.lean,Mathlib/Topology/Algebra/Valued/ValuativeRel.lean 2 3 ['github-actions', 'grunweg', 'mathlib4-merge-conflict-bot'] nobody
272-60467
8 months ago
282-25511
282 days ago
7-4998
7 days
27399 MoritzBeroRoos
author:MoritzBeroRoos
 chore: replace every usage of ⬝ᵥ (with old \cdot) by ·ᵥ (with \centerdot) Discussion at [zulip](https://leanprover.zulipchat.com/#narrow/channel/270676-lean4/topic/.5Ccdot.20!.3D.20.5Ccenterdot). Currently the abbreviations `\cdot` and `\centerdot` resolve to different, with the naked eye nearly undistinguishable symbols (despite the c in cdot surely standing for `center`..): - `\cdot` gives ⬝ [U+2B1D](https://www.compart.com/en/unicode/U+2B1D) "Black Very Small Square" - `\centerdot` gives · [U+00B7](https://www.compart.com/en/unicode/U+00B7) "Middle Dot" Mathlib mostly uses the `\centerdot` variant, except for the dotProduct notation and some probably unsuspecting people wanting \centerdot but getting \cdot in their comments and 6 uses of a notation using the raw `\cdot` without any subscript at `Mathlib\Topology\Homotopy\Product.lean`. This PR replaces the dot product `⬝ᵥ` with its `\centerdot` counterpart `·ᵥ`. The related PR [here](https://github.com/leanprover/vscode-lean4/pull/639) can then overwrite the `\cdot` abbreviation, to produce the same symbol as the `centerdot` abbreviation does. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict new-contributor 133/133 Mathlib/Analysis/CStarAlgebra/CStarMatrix.lean,Mathlib/Analysis/InnerProductSpace/PiL2.lean,Mathlib/Combinatorics/Configuration.lean,Mathlib/Combinatorics/SimpleGraph/AdjMatrix.lean,Mathlib/Combinatorics/SimpleGraph/LapMatrix.lean,Mathlib/Data/Matrix/Block.lean,Mathlib/Data/Matrix/ConjTranspose.lean,Mathlib/Data/Matrix/Hadamard.lean,Mathlib/Data/Matrix/Mul.lean,Mathlib/Data/Matrix/Notation.lean,Mathlib/Data/Matrix/Reflection.lean,Mathlib/Data/Matrix/RowCol.lean,Mathlib/Data/Matrix/Vec.lean,Mathlib/LinearAlgebra/CrossProduct.lean,Mathlib/LinearAlgebra/Matrix/BilinearForm.lean,Mathlib/LinearAlgebra/Matrix/DotProduct.lean,Mathlib/LinearAlgebra/Matrix/Nondegenerate.lean,Mathlib/LinearAlgebra/Matrix/Orthogonal.lean,Mathlib/LinearAlgebra/Matrix/PosDef.lean,Mathlib/LinearAlgebra/Matrix/SchurComplement.lean,Mathlib/LinearAlgebra/Matrix/SesquilinearForm.lean,Mathlib/LinearAlgebra/Matrix/Trace.lean,Mathlib/LinearAlgebra/PerfectPairing/Matrix.lean,Mathlib/LinearAlgebra/Projectivization/Constructions.lean,Mathlib/Topology/Instances/Matrix.lean 25 6 ['MoritzBeroRoos', 'eric-wieser', 'github-actions', 'leanprover-community-bot-assistant'] nobody
272-22345
8 months ago
295-36436
295 days ago
7-62439
7 days
28148 kckennylau
author:kckennylau
 feat(Matrix): Simproc and Rw-proc for Matrix Transpose Co-authored by Aaron Liu. ```lean example : !![1, 2, 3; 4, 5, 6]ᵀ = !![1, 4; 2, 5; 3, 6] := by rw [transpose_of% 2 3] example : !![1, 2, 3; 4, 5, 6]ᵀ = !![1, 4; 2, 5; 3, 6] := by rw [transpose_of] example : !![1, 2, 3; 4, 5, 6]ᵀ = !![1, 4; 2, 5; 3, 6] := by simp only [matrix_transpose] ``` --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-meta 267/8 Mathlib.lean,Mathlib/Data/Matrix/Notation.lean,Mathlib/LinearAlgebra/UnitaryGroup.lean,Mathlib/Tactic.lean,Mathlib/Tactic/Simproc/Matrix.lean,MathlibTest/Simproc/Matrix.lean,MathlibTest/matrix.lean,scripts/noshake.json 8 32 ['eric-wieser', 'github-actions', 'kckennylau', 'mathlib4-merge-conflict-bot', 'plp127'] eric-wieser
assignee:eric-wieser
267-65679
8 months ago
267-65680
267 days ago
12-78143
12 days
26908 robin-carlier
author:robin-carlier
 feat(CategoryTheory/Monoidal/DayConvolution): alternative ext principle for unitors Currently, our infrastructure for left/right unitors for Day convolution of functors `C ⥤ V` do not have satisfactory extensionality principle: the current way to characterize morphisms out of `U ⊛ F` is the default extensionality principle for Day convolution, which characterizes first such functors via functors out of `U ⊠ F`. Left unitors are then obtained using the fact `U ⊠ F` is a left Kan extension of a functor from `PUnit × C` (which is equivalent to `C`) but we did not record on its own this principle. Using the transitivity of left Kan extensions proved in #26899, we directly exhibit `U ⊛ F` as a left Kan extension of `F ⋙ tensorLeft (𝟙_ V)` along `tensorLeft (𝟙_ C)`. The unit of this Kan extension is composed exactly of the morphisms that appear in the [characterization of left unitors](https://leanprover-community.github.io/mathlib4_docs/Mathlib/CategoryTheory/Monoidal/DayConvolution.html#CategoryTheory.MonoidalCategory.DayConvolutionUnit.leftUnitor_hom_unit_app). We also slightly generalize the instances that express that external products with unitors are left Kan extensions, so that they can be used when taking external products with more complicated functors than currently. This is again useful when chaining extensionality lemmas for morphisms out of terms of the form `(F ⊛ U) ⊛ G`. We prove a similar thing for right unitors With this, it should be possible to have a much more satisfactory way of working with Day convolutions: this allows to "elimiinate" units without ending up with terms in an external product. --- - [ ] depends on: #26899 - [ ] depends on: #26906 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-category-theory 307/18 Mathlib/CategoryTheory/Functor/KanExtension/Basic.lean,Mathlib/CategoryTheory/Monoidal/DayConvolution.lean 2 4 ['github-actions', 'leanprover-community-bot-assistant', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
256-25625
8 months ago
256-25626
256 days ago
0-1812
30 minutes
27150 robin-carlier
author:robin-carlier
 feat(CategoryTheory/Monoidal/DayConvolution): constructors for braided and symmetric structure on day convolutions monoidal categories Following the pattern in #27119, we give API to construct `BraidedCategory` and `SymmetricCategory` structures on a monoidal category equipped with a `LawfulDayConvolutionMonoidalCategoryStruct`. To achieve this, we introduce an other type class `LawfulDayConvolutionBraidedCategoryStruct` that bundles an associator isomorphism that behaves like the one constructed for functors in #27067. We provide a noncomputable constructor for this typeclass that takes as input fullness of the "realization" functor to a category of functors, and we show that the typeclasses are sufficient to define the desired structures. --- - [x] depends on: #27067 - [x] depends on: #26820 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-category-theory 826/9 Mathlib/CategoryTheory/Monoidal/DayConvolution.lean,Mathlib/CategoryTheory/Monoidal/DayConvolution/Braided.lean 2 5 ['github-actions', 'leanprover-community-bot-assistant', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
256-20664
8 months ago
311-50359
311 days ago
0-1002
16 minutes
27119 robin-carlier
author:robin-carlier
 feat(CategoryTheory/Monoidal/DayConvolution): constructors for closed monoidal day convolution monoidal structures Following the pattern introduced in #26798 and #26820 and using results of #26879, we introduce a typeclass `LawfulDayConvolutionClosedMonoidalCategoryStruct` that encodes the data needed on a `LawfulDayConvolutionMonoidalCategoryStruct` to define well-behaved internal homs. We give a constructor assuming existence of relevant ends, and prove that this data defines a `MonoidalClosed` instance on the monoidal category structures one can deduce from `LawfulDayConvolutionMonoidalCategoryStruct`. --- - [x] depends on: #27079 - [x] depends on: #27091 - [x] depends on: #26879 - [x] depends on: #26820 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-category-theory 900/9 Mathlib/CategoryTheory/Monoidal/DayConvolution.lean,Mathlib/CategoryTheory/Monoidal/DayConvolution/Closed.lean 2 6 ['github-actions', 'leanprover-community-bot-assistant', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
255-34515
8 months ago
312-55827
312 days ago
0-1
1 second
28623 gilesgshaw
author:gilesgshaw
 feat(Logic/Basic): minor additions and simplification of proofs Add new theorems and simplify proofs. Specifically, we add the family of related theorems `apply_dite_iff_exists`, `apply_dite_iff_forall`, `apply_ite_iff_and` and `apply_ite_iff_or`. For each other 'family' of theorems in the file that is analogous to the above, we do the following - Simplify proofs where possible, e.g. by appealing to the new theorems - Complete the family, if any of the corresponding four are missing - Rename to ensure consistency with the above pattern --- merge-conflict t-logic new-contributor 83/55 Archive/Examples/IfNormalization/Result.lean,Archive/Examples/IfNormalization/WithoutAesop.lean,Mathlib/Algebra/ContinuedFractions/Computation/Translations.lean,Mathlib/Algebra/MvPolynomial/Variables.lean,Mathlib/Algebra/Notation/Indicator.lean,Mathlib/LinearAlgebra/Matrix/Rank.lean,Mathlib/Logic/Basic.lean,Mathlib/MeasureTheory/Measure/WithDensity.lean,Mathlib/SetTheory/Ordinal/Notation.lean 9 12 ['eric-wieser', 'gilesgshaw', 'github-actions', 'mathlib4-merge-conflict-bot', 'plp127'] awainverse
assignee:awainverse
255-28376
8 months ago
255-28377
255 days ago
10-61840
10 days
26154 ADedecker
author:ADedecker
 refactor: add refactored APIs for algebraic filter bases This PR continues the work from #18437. Original PR: https://github.com/leanprover-community/mathlib4/pull/18437 merge-conflict t-topology 651/0 Mathlib.lean,Mathlib/Topology/Algebra/FilterBasis.lean,Mathlib/Topology/Algebra/FilterBasisNew.lean,Mathlib/Topology/Algebra/Nonarchimedean/Bases.lean,Mathlib/Topology/Algebra/Nonarchimedean/BasesNew.lean 5 3 ['ADedecker', 'github-actions', 'mathlib4-merge-conflict-bot'] PatrickMassot
assignee:PatrickMassot
249-40620
8 months ago
249-40621
249 days ago
87-79752
87 days
29330 plp127
author:plp127
 chore: define `Fin.cycleIcc` with conditions Redefine `Fin.cycleIcc` using conditionals instead of composing existing `Fin` operations together. Its worst-case runtime drops from O(n) to O(1). As a bonus, the definition no longer needs explaining. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-group-theory 61/68 Mathlib/GroupTheory/Perm/Fin.lean 1 10 ['JovanGerb', 'eric-wieser', 'github-actions', 'mathlib4-merge-conflict-bot', 'plp127', 'tb65536'] nobody
240-52217
7 months ago
240-52218
240 days ago
20-3817
20 days
21950 erdOne
author:erdOne
 feat(NumberTheory/Padics): the completion of `ℚ` at a finite place is `ℚ_[p]` --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-number-theory 253/1 Mathlib.lean,Mathlib/Algebra/GroupWithZero/WithZero.lean,Mathlib/NumberTheory/Padics/HeightOneSpectrum.lean,Mathlib/NumberTheory/Padics/PadicNumbers.lean,Mathlib/Topology/Algebra/Valued/WithVal.lean,Mathlib/Topology/Algebra/WithZeroMulInt.lean,Mathlib/Topology/Algebra/WithZeroTopology.lean 7 33 ['Ruben-VandeVelde', 'erdOne', 'faenuccio', 'github-actions', 'leanprover-community-bot-assistant', 'pechersky', 'smmercuri', 'xroblot'] nobody
238-27327
7 months ago
319-27264
319 days ago
73-10873
73 days
27214 robin-carlier
author:robin-carlier
 feat(CategoryTheory/Limits/Shapes/Pullback/Categorical): Categorical pullback squares In this PR, we give the definition and first basic properties of categorical pullback squares. Using our previous work on `CategoricalPullback`, we define a typeclass `CatPullbackSquare T L R B` that asserts that a given `CatCommSq T L R B` is a "pullback square": this is the data of a chosen adjoint equivalence to the canonical functor from the top left corner of the square to the categorical pulback of its leg. Using this equivalence, be derive a universal property for functors from `X`with values in the top left corner of the square: they are equivalent to `CatCommSqOver R B X`, the category of categorical commutative squares over the cospan `R, B` with top left corner `X`. We prove some coherence result for this equivalence, most notably an isomorphism that, given `S : CatCommSqOver R B X`, bundles the two commutative triangles formed by the induced functor, and the coherence between the squares that these isomorphisms satisfy: this is conveniently bundled in the data of a single isomorphisms of `CatCommSqOver R B X`. Finally, we provide a `Prop`-class `IsCatPullbackSquare` that merely asserts the existence (via `Nonempty`) of the relevant data: we show that it is tautotogically equivalent to the propopsition that the canonical functor to the categorical pullback is an equivalence. --- - [ ] depends on: #26679 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-category-theory 786/1 Mathlib.lean,Mathlib/CategoryTheory/Limits/Shapes/Pullback/Categorical/Basic.lean,Mathlib/CategoryTheory/Limits/Shapes/Pullback/Categorical/Square.lean 3 3 ['github-actions', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
235-17409
7 months ago
235-17410
235 days ago
0-4464
1 hour
26466 robin-carlier
author:robin-carlier
 feat(AlgebraicTopology/SimplexCategory/Augmented): the canonical monoid object in the augmented simplex category Show that in the augmented simplex category, `⦋0⦌` is an internal monoid object. Future work will show that this is in fact the universal monoid object: for any monoidal category `C`, evaluation at `⦋0⦌` induces an equivalence of categories between `Mon_ C` and the category of monoidal functors from `AugmentedSimplexCategory` to `C`. The resulting augmented cosimplicial object one gets from this construction is sometimes called the "monoidal bar construction" attached to a monoid. This PR was split from #25743. --- - [ ] depends on: #25743 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-algebraic-topology t-category-theory 571/111 Mathlib.lean,Mathlib/AlgebraicTopology/SimplexCategory/Augmented.lean,Mathlib/AlgebraicTopology/SimplexCategory/Augmented/Basic.lean,Mathlib/AlgebraicTopology/SimplexCategory/Augmented/Mon_.lean,Mathlib/AlgebraicTopology/SimplexCategory/Augmented/Monoidal.lean,Mathlib/AlgebraicTopology/SimplexCategory/Basic.lean 6 4 ['github-actions', 'leanprover-community-bot-assistant', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
234-36811
7 months ago
329-44095
329 days ago
0-1708
28 minutes
26578 robin-carlier
author:robin-carlier
 feat(CategoryTheory/Limits/Pullbacks/Categorical/CatCospanTransform): adjunctions of categorical cospans We build upon the bicategory-like structure developed in #26447 and #26412 to define the notion of adjunctions of categorical cospans. This is a structure encoding the data of two `CatCospanTransform`s, along with the usual unit and counit morphisms as part of the data, satisfying the usual left and right triangle identities. We provide basic API for these, such as extracting adjunctions between individual components. We also provide a proof that the notion satisfies a "coherence": with our chosen constructor, the forward direction of the structure `CatCommSq` on the left adjoints correspond to the inverse of the square for the right adjoints through `mateEquiv`. These adjunctions will be used as a substrate for defining equivalences of categorical cospans in a future PR: such an equivalence will be a structure extending a `CatCospanAdjunction` with isomorphisms data on the unit and co-unit (we will however provide alternative constructors in sync with the constructor for equivalences of categories). --- - [x] depends on: #26447 - [x] depends on: #26547 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-category-theory large-import 205/0 Mathlib/CategoryTheory/Limits/Shapes/Pullback/Categorical/CatCospanTransform.lean 1 5 ['github-actions', 'leanprover-community-bot-assistant', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
233-40036
7 months ago
325-49208
325 days ago
0-625
10 minutes
23621 astrainfinita
author:astrainfinita
 chore: deprecate `LinearOrderedComm{Monoid, Group}WithZero` --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) - [x] depends on: #20676 merge-conflict t-algebra t-order
label:t-algebra$
 261/205 Archive/Imo/Imo1998Q2.lean,Counterexamples/LinearOrderWithPosMulPosEqZero.lean,Mathlib/Algebra/Order/Field/Canonical.lean,Mathlib/Algebra/Order/Field/Rat.lean,Mathlib/Algebra/Order/Floor/Ring.lean,Mathlib/Algebra/Order/GroupWithZero/Canonical.lean,Mathlib/Algebra/Order/GroupWithZero/Finset.lean,Mathlib/Algebra/Order/Hom/Monoid.lean,Mathlib/Algebra/Order/Nonneg/Field.lean,Mathlib/Algebra/Order/Nonneg/Ring.lean,Mathlib/Algebra/Order/Ring/Nat.lean,Mathlib/Combinatorics/Additive/PluenneckeRuzsa.lean,Mathlib/Combinatorics/SimpleGraph/Triangle/Basic.lean,Mathlib/Data/ENNReal/Basic.lean,Mathlib/Data/NNRat/Lemmas.lean,Mathlib/Data/NNReal/Defs.lean,Mathlib/Data/Rat/Cast/Order.lean,Mathlib/FieldTheory/IntermediateField/Adjoin/Defs.lean,Mathlib/FieldTheory/RatFunc/AsPolynomial.lean,Mathlib/GroupTheory/ArchimedeanDensely.lean,Mathlib/NumberTheory/EllipticDivisibilitySequence.lean,Mathlib/NumberTheory/FunctionField.lean,Mathlib/NumberTheory/Ostrowski.lean,Mathlib/RingTheory/Valuation/Archimedean.lean,Mathlib/RingTheory/Valuation/Basic.lean,Mathlib/RingTheory/Valuation/ExtendToLocalization.lean,Mathlib/RingTheory/Valuation/Integers.lean,Mathlib/RingTheory/Valuation/Integral.lean,Mathlib/RingTheory/Valuation/Minpoly.lean,Mathlib/RingTheory/Valuation/Quotient.lean,Mathlib/RingTheory/Valuation/RankOne.lean,Mathlib/RingTheory/Valuation/ValExtension.lean,Mathlib/RingTheory/Valuation/ValuationRing.lean,Mathlib/RingTheory/Valuation/ValuationSubring.lean,Mathlib/SetTheory/Cardinal/Order.lean,Mathlib/Topology/Algebra/Valued/LocallyCompact.lean,Mathlib/Topology/Algebra/Valued/NormedValued.lean,Mathlib/Topology/Algebra/Valued/ValuationTopology.lean,Mathlib/Topology/Algebra/Valued/ValuedField.lean,Mathlib/Topology/Algebra/Valued/WithVal.lean,Mathlib/Topology/Algebra/WithZeroTopology.lean,Mathlib/Topology/UnitInterval.lean,MathlibTest/instance_diamonds.lean,scripts/noshake.json 44 24 ['YaelDillies', 'astrainfinita', 'github-actions', 'grunweg', 'leanprover-bot', 'leanprover-community-bot-assistant', 'mathlib4-dependent-issues-bot'] kbuzzard
assignee:kbuzzard
230-21751
7 months ago
400-80524
400 days ago
5-42380
5 days
27990 kckennylau
author:kckennylau
 feat(Counterexamples): a nontrivial valuation with discrete topology This file constructs a valuation on `K[X]` satisfying `IsValuativeTopology K[X] ∧ Nonempty (valuation K[X]).RankOne ∧ IsNontrivial K[X] ∧ DiscreteTopology K[X]`, and proves that `IsValuativeTopology F ∧ IsNontrivial F ∧ DiscreteTopology F` is not possible if `F` is a field. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-ring-theory 172/0 Counterexamples.lean,Counterexamples/DiscreteTopologyWithNontrivialValuation.lean 2 14 ['github-actions', 'grunweg', 'kckennylau', 'mathlib4-merge-conflict-bot', 'pechersky'] nobody
222-23882
7 months ago
222-23883
222 days ago
67-79609
67 days
28132 dupuisf
author:dupuisf
 feat: preliminary `grind` tags for `IsUnit` This PR adds preliminary `grind` tags for the `IsUnit` predicate. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-algebra
label:t-algebra$
 61/17 Mathlib/Algebra/Group/Action/Units.lean,Mathlib/Algebra/Group/Units/Defs.lean,Mathlib/Algebra/GroupWithZero/Units/Basic.lean,Mathlib/Algebra/Ring/Units.lean,Mathlib/Analysis/CStarAlgebra/ContinuousFunctionalCalculus/Order.lean,Mathlib/Analysis/SpecialFunctions/ContinuousFunctionalCalculus/Rpow/Basic.lean 6 3 ['github-actions', 'mathlib4-merge-conflict-bot'] kim-em
assignee:kim-em
199-480
6 months ago
199-481
199 days ago
80-71575
80 days
26827 pechersky
author:pechersky
 feat(Analysis/Normed/ValuativeRel): helper instance for NormedField --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) - [x] depends on: #26713 - [x] depends on: #26826 merge-conflict t-algebra t-number-theory t-analysis
label:t-algebra$
 211/27 Mathlib.lean,Mathlib/Analysis/Normed/ValuativeRel.lean,Mathlib/Topology/Algebra/Valued/ValuativeRel.lean 3 34 ['ADedecker', 'adamtopaz', 'erdOne', 'github-actions', 'kbuzzard', 'kckennylau', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot', 'pechersky'] kbuzzard
assignee:kbuzzard
191-29084
6 months ago
191-29084
191 days ago
122-64394
122 days
22662 plp127
author:plp127
 feat: Localization.Away.lift (computably) This PR adds `Localization.Away.lift'` and `Localization.Away.lift`, computable alternatives to `Localization.awayLift`. --- - [x] depends on: #24791 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-algebra
label:t-algebra$
 74/0 Mathlib/RingTheory/Localization/Away/Basic.lean 1 18 ['eric-wieser', 'github-actions', 'grunweg', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot', 'plp127', 'vihdzp'] kim-em
assignee:kim-em
184-51743
6 months ago
184-51744
184 days ago
257-28368
257 days
24850 pechersky
author:pechersky
 feat(Topology/UniformSpace/Ultra): uniform spaces induced by pseudometrics are ultra if system is ultra Any uniform space has a natural system of pseudometrics definable on it, comprised of those pseudometrics constructed from a descending chain of equivalence relation entourages. In a nonarchimedean uniformity, this pseudometric system induces the uniformity. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) - [x] depends on: #23111 merge-conflict t-topology 509/1 Mathlib.lean,Mathlib/Topology/MetricSpace/BundledFun.lean,Mathlib/Topology/UniformSpace/Ultra/Pseudometrizable.lean 3 9 ['ADedecker', 'fpvandoorn', 'github-actions', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot', 'pechersky'] urkud
assignee:urkud
184-51571
6 months ago
184-51572
184 days ago
177-43034
177 days
26914 quangvdao
author:quangvdao
 feat(Data/PFunctor/Univariate): more definitions for univariate `PFunctor` This PR defines several basic definitions of `PFunctor`, including zero, one, constants, monomials, coproduct (sum), product, sigma, pi, tensor product, universe lifting, and equivalence. We also add: (1) simple lemmas connecting the basic definitions, (2) an automatically derived ext lemma for `PFunctor` via `@[ext]` attribute Some things I'm not clear on: - I define `HAdd` and `HMul` instances for coproduct and product of poly functors having different universe levels. Should I also define `Add` and `Mul` instances for poly functors having the same universe level? - Is it ok to define notation for tensor product, i.e. `@[inherit_doc] scoped infixr:80 " ⊗ " => tensor`? I'm worried it might clash with other notation. - Need a double-check on the priority of notation. Some future definitions to add: - Various equivalences arising from arithmetic identities, e.g., `P + 0 ≃ₚ P`. - Definitions of Lenses and Charts (each of them will be a file or even a folder) - Exponential objects (corresponding to both `prod` and `tensor`) --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-data 144/5 Mathlib/Data/PFunctor/Univariate/Basic.lean 1 20 ['alexkeizer', 'eric-wieser', 'github-actions', 'mathlib4-merge-conflict-bot', 'quangvdao'] eric-wieser
assignee:eric-wieser
184-51049
6 months ago
184-51050
184 days ago
133-23955
133 days
28125 nonisomorphiclinearmap
author:nonisomorphiclinearmap
 feat(Combinatorics): basic definition of simplicial complexes This PR introduces the basic definition of a finite (abstract) simplicial complex, located in Mathlib/Combinatorics/SimplicialComplex/Basic.lean. --- This is our first contribution to mathlib. This work was done as part of the Fields Institute Summer Undergraduate Program on formalization in topological combinatorics. Eventually, we aim to formalize Lovasz's proof of the Kneser Conjecture and this is a small stepping stone in that direction. Some other commits will shortly depend on this one. We would like to acknowledge the Fields Institute for Research in Mathematical Sciences for their sponsorship. We would also like to thank our supervisors, Professor Chris Kapulkin and Mr. Daniel Carranza, for their guidance and support throughout this project. We would also like to thank our group members Tom Lindquist and Quang Minh Nguyen for our fruitful discussions. merge-conflict t-combinatorics new-contributor 374/0 Mathlib.lean,Mathlib/Combinatorics/SimplicialComplex/Basic.lean,Mathlib/Combinatorics/SimplicialComplex/Category.lean,Mathlib/Combinatorics/SimplicialComplex/FacePoset.lean,Mathlib/Combinatorics/SimplicialComplex/Hom.lean 5 2 ['github-actions', 'mathlib4-merge-conflict-bot'] awainverse
assignee:awainverse
184-50744
6 months ago
184-50745
184 days ago
99-64548
99 days
28871 JaafarTanoukhi
author:JaafarTanoukhi
 feat(Combinatorics/Digraph): Tournaments Define orientations and tournaments. Related to #26771. Co-authored-by: Rida Hamadani --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-combinatorics new-contributor 62/0 Mathlib.lean,Mathlib/Combinatorics/Digraph/Orientation.lean,Mathlib/Combinatorics/Digraph/Tournament.lean 3 6 ['JaafarTanoukhi', 'Rida-Hamadani', 'SnirBroshi', 'github-actions', 'mathlib4-merge-conflict-bot'] kmill
assignee:kmill
184-50591
6 months ago
184-50592
184 days ago
55-54919
55 days
29526 llllvvuu
author:llllvvuu
 feat: `Multiset.map f` identifies `f` up to permutation Motivation: Reason about `Fintype`-indexed families via `Multiset` equality. Example use case 1: ```lean theorem Matrix.IsHermitian.cfc_eigenvalues {d : Type*} [Fintype d] [DecidableEq d] {M : Matrix d d 𝕜} (hM : M.IsHermitian) (f : ℝ → ℝ) (hcfc : Matrix.IsHermitian (cfc f M) := cfc_predicate f M) : ∃ (e : d ≃ d), hcfc.eigenvalues = f ∘ hM.eigenvalues ∘ e := by have := hcfc.roots_charpoly_eq_eigenvalues.symm rw [hM.charpoly_cfc_eq f, Polynomial.roots_prod] at this; swap · simp [Finset.prod_ne_zero_iff, Polynomial.X_sub_C_ne_zero] simp_rw [Polynomial.roots_X_sub_C, Multiset.bind_singleton] at this have he := (Multiset.compTriple_equivOfMapUnivEq this).comp_eq simp_rw [← Function.comp_def RCLike.ofReal, ← Function.comp_def f, Function.comp_assoc] at he exact ⟨_, RCLike.ofReal_injective.comp_left he.symm⟩ ``` Example use case 2 (on top of https://github.com/leanprover-community/mathlib4/pull/29610): ```lean theorem LinearMap.Eigenbasis.μ_equiv {ι ι' R G : Type*} [Fintype ι] [Fintype ι'] [CommRing R] [IsDomain R] [AddCommGroup G] [Module R G] [Module.Free R G] [Module.Finite R G] {f : Module.End R G} (B₁ : f.Eigenbasis ι) (B₂ : f.Eigenbasis ι') : ∃ e : ι ≃ ι', B₁.μ = B₂.μ ∘ e := by classical have := congr(Polynomial.roots $(B₁.charpoly_eq.symm.trans B₂.charpoly_eq)) rw [Polynomial.roots_prod, Polynomial.roots_prod] at this; rotate_left · simp [Finset.prod_ne_zero_iff, Polynomial.X_sub_C_ne_zero] · simp [Finset.prod_ne_zero_iff, Polynomial.X_sub_C_ne_zero] simp_rw [Polynomial.roots_X_sub_C, Multiset.bind_singleton] at this exact ⟨Multiset.equivOfMapUnivEq this, (Multiset.compTriple_equivOfMapUnivEq this).comp_eq.symm⟩ ``` Co-authored-by: Aristotle Harmonic --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-data 35/0 Mathlib/Data/Multiset/Fintype.lean 1 9 ['Ruben-VandeVelde', 'github-actions', 'llllvvuu', 'mathlib4-merge-conflict-bot', 'vihdzp', 'wwylele'] pechersky
assignee:pechersky
184-50553
6 months ago
184-50554
184 days ago
69-23034
69 days
29947 JaafarTanoukhi
author:JaafarTanoukhi
 feat(Combinatorics/Digraph): Maps Ported `SimpleGraph/Maps.lean` to `Digraph/Maps.lean` for future PRs related to issue #[26771](https://github.com/leanprover-community/mathlib4/issues/26771) --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-combinatorics new-contributor 476/0 Mathlib.lean,Mathlib/Combinatorics/Digraph/Maps.lean 2 2 ['github-actions', 'mathlib4-merge-conflict-bot'] awainverse
assignee:awainverse
184-49957
6 months ago
184-49958
184 days ago
54-82760
54 days
31356 adomani
author:adomani
 feat: add inspect-like functions Produces a tree-like formatting for `Syntax`, `Expr` and `InfoTree`. Especially for the `InfoTree`s, there are *many* parts of it that do not get printed. For instance, this is how the `InfoTree`s of `set_option linter.missingDocs true` get printed: ```lean inspectIT set_option linter.missingDocs true /- commandCtx |-Info.ofCommandInfo: Lean.Elab.Command.elabSetOption, 'set_option…gDocs true' | |-Info.ofCompletionInfo.CompletionInfo.option 'set_option…issingDocs' | |-Info.ofOptionInfo: linter.missingDocs, Linter.linter.missingDocs -/ ``` --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-meta 720/0 Mathlib.lean,Mathlib/Util/Inspect.lean,MathlibTest/Inspect.lean 3 3 ['github-actions', 'mathlib4-merge-conflict-bot', 'plp127'] kim-em
assignee:kim-em
184-44978
6 months ago
184-44979
184 days ago
11-61697
11 days
6993 jjaassoonn
author:jjaassoonn
 feat: lemmas about `AddMonoidAlgebra.{divOf, modOf}` --- - [x] depends on: #7582 - [x] depends on: #8975 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-algebra
label:t-algebra$
 147/3 Mathlib/Algebra/MonoidAlgebra/Division.lean,Mathlib/Data/Finsupp/Basic.lean,Mathlib/Data/MvPolynomial/Basic.lean,Mathlib/Data/MvPolynomial/CommRing.lean,Mathlib/Data/MvPolynomial/Division.lean 5 42 ['YaelDillies', 'alreadydone', 'digama0', 'eric-wieser', 'github-actions', 'jjaassoonn', 'leanprover-community-mathlib4-bot'] nobody
184-23902
6 months ago
854-28655
854 days ago
103-330
103 days
9339 FMLJohn
author:FMLJohn
 feat(RingTheory/GradedAlgebra/HomogeneousIdeal): given a finitely generated homogeneous ideal of a graded semiring, construct a finite spanning set for the ideal which only contains homogeneous elements --- - [ ] depends on: #8187 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-ring-theory 402/4 Mathlib.lean,Mathlib/Algebra/DirectSum/Internal.lean,Mathlib/Algebra/GradedMonoid.lean,Mathlib/Algebra/Module/GradeZeroModule.lean,Mathlib/RingTheory/Finiteness.lean,Mathlib/RingTheory/GradedAlgebra/Basic.lean,Mathlib/RingTheory/GradedAlgebra/HomogeneousIdeal.lean,Mathlib/RingTheory/GradedAlgebra/Noetherian.lean 8 11 ['FMLJohn', 'github-actions', 'jjaassoonn', 'leanprover-community-mathlib4-bot'] nobody
184-23855
6 months ago
868-28833
868 days ago
6-63597
6 days
10349 Shamrock-Frost
author:Shamrock-Frost
 refactor(CategoryTheory/MorphismProperty): some clean-ups We make explicit some of the galois connections/closure operators in the existing MorphismProperty file, rewrite some proofs to take advantage of these structures, and change map/inverseImage by (1) swapping their argument order, for consistency with Set.range and Set.preimage and (2) making "map" perform the strict, evil map while "essMap" (previously called map) forms the closure of the image under isomorphisms. Finally we add `IsMultiplicative` instances for isos/epis/monos, with an eye towards constructing the wide subcategory on these classes of maps. --- - [x] depends on: #10347 - [x] depends on: #10348 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-category-theory 474/318 Mathlib/CategoryTheory/Localization/Composition.lean,Mathlib/CategoryTheory/Localization/LocalizerMorphism.lean,Mathlib/CategoryTheory/MorphismProperty.lean,Mathlib/Data/Set/Lattice.lean,Mathlib/Order/Closure.lean,Mathlib/Order/Hom/Basic.lean,Mathlib/Order/Hom/CompleteLattice.lean,Mathlib/Order/RelIso/Basic.lean 8 1 ['leanprover-community-mathlib4-bot'] nobody
184-23813
6 months ago
834-78957
834 days ago
0-418
6 minutes
26890 robin-carlier
author:robin-carlier
 feat(CategoryTheory/Monoidal/DayConvolution): more API for `DayFunctor` We provide some lemmas that helps characterizing the monoidal structure on `DayFunctor`, they are special cases of the lemmas for `LawfulDayConvolutionMonoidalCategoryStruct`. --- - [x] depends on: #26824 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-category-theory 1372/19 Mathlib.lean,Mathlib/CategoryTheory/Functor/KanExtension/Basic.lean,Mathlib/CategoryTheory/Monoidal/DayConvolution.lean,Mathlib/CategoryTheory/Monoidal/DayConvolution/DayFunctor.lean 4 5 ['github-actions', 'leanprover-community-bot-assistant', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
184-23205
6 months ago
318-48214
318 days ago
0-517
8 minutes
24016 plp127
author:plp127
 feat: fine uniformity Adds the fine uniformity, and proves some properties. --- - [ ] depends on: #24096 for showing the induced topology is equal on completely regular spaces [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-topology 283/0 Mathlib.lean,Mathlib/Topology/UniformSpace/FineUniformity.lean,Mathlib/Topology/UniformSpace/Uniformizable.lean 3 3 ['github-actions', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
178-69972
5 months ago
400-78722
400 days ago
2-85308
2 days
26912 pechersky
author:pechersky
 chore(Algebra/Ring/Subring): simp tag `Subring.smul_def` s-multiplying by a subtype is easiest to manipulate when both terms are in the ambient type. Many places that had to use the _def lemma for a rewrite, or to include it in a simp set, no longer have to. Ported from #25308 --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) I found this being not-simp frustrating when talking about submodules over a valuation subring. merge-conflict t-algebra
label:t-algebra$
 67/66 Mathlib/Algebra/Algebra/Subalgebra/Basic.lean,Mathlib/Algebra/Field/Subfield/Basic.lean,Mathlib/Algebra/Group/Subgroup/Actions.lean,Mathlib/Algebra/Group/Submonoid/MulAction.lean,Mathlib/Algebra/Module/LocalizedModule/Basic.lean,Mathlib/Algebra/Module/LocalizedModule/Exact.lean,Mathlib/Algebra/Module/LocalizedModule/IsLocalization.lean,Mathlib/Algebra/Module/LocalizedModule/Submodule.lean,Mathlib/Algebra/Ring/Periodic.lean,Mathlib/Algebra/Ring/Subring/Basic.lean,Mathlib/Algebra/Ring/Subsemiring/Basic.lean,Mathlib/Analysis/CStarAlgebra/Basic.lean,Mathlib/FieldTheory/KummerExtension.lean,Mathlib/GroupTheory/GroupAction/Defs.lean,Mathlib/GroupTheory/GroupAction/MultiplePrimitivity.lean,Mathlib/GroupTheory/GroupAction/MultipleTransitivity.lean,Mathlib/GroupTheory/GroupAction/SubMulAction/OfFixingSubgroup.lean,Mathlib/GroupTheory/GroupAction/SubMulAction/OfStabilizer.lean,Mathlib/LinearAlgebra/RootSystem/Irreducible.lean,Mathlib/LinearAlgebra/RootSystem/WeylGroup.lean,Mathlib/RingTheory/Etale/Kaehler.lean,Mathlib/RingTheory/Ideal/Over.lean,Mathlib/RingTheory/LocalProperties/Projective.lean,Mathlib/RingTheory/Localization/InvSubmonoid.lean,Mathlib/RingTheory/OreLocalization/Basic.lean 25 26 ['artie2000', 'eric-wieser', 'github-actions', 'j-loreaux', 'kckennylau', 'leanprover-bot', 'leanprover-radar', 'linesthatinterlace', 'mathlib4-merge-conflict-bot', 'pechersky'] joelriou
assignee:joelriou
157-82756
5 months ago
179-32305
179 days ago
63-23787
63 days
33434 astrainfinita
author:astrainfinita
 chore: redefine `Finsupp.indicator` using `Finsupp.onFinset` --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-data merge-conflict 6/17 Mathlib/Data/Finsupp/Indicator.lean 1 2 ['github-actions', 'mathlib-merge-conflicts'] nobody
135-29295
4 months ago
43-6451
43 days ago
5-35275
5 days
33126 CoolRmal
author:CoolRmal
 feat: function composition preserves boundedness This PR adds the following theorem: if the range of a function `g` is bounded above, then `g ∘ f` is bounded above for all functions `f`. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-order merge-conflict 12/0 Mathlib/Order/Bounds/Basic.lean 1 2 ['github-actions', 'mathlib4-merge-conflict-bot'] bryangingechen
assignee:bryangingechen
126-27208
4 months ago
126-27209
126 days ago
27-6197
27 days
29587 uniwuni
author:uniwuni
 feat(GroupTheory/Finiteness): define finitely generated semigroups We define finitely generated semigroups and basics similarly to monoids and groups and prove that semigroups and monoids remain finitely generated when a congruence is quotiented out. This will be important when further developing semigroup theory. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-group-theory 259/14 Mathlib/Algebra/Group/Submonoid/Defs.lean,Mathlib/GroupTheory/Finiteness.lean 2 4 ['github-actions', 'mathlib4-merge-conflict-bot', 'plp127', 'uniwuni'] dupuisf
assignee:dupuisf
124-38777
4 months ago
226-43681
226 days ago
25-78230
25 days
29014 ShreckYe
author:ShreckYe
 feat(Data/List/Scan): some theorems that relate `scanl` with `foldl` I am not sure which is the best form of `getElem_scanl_eq_foldl_take` here, so I added several alternative forms. Feel free to remove any of them if necessary. merge-conflict t-data 35/0 Mathlib/Data/List/Scan.lean 1 15 ['ShreckYe', 'github-actions', 'mathlib4-merge-conflict-bot', 'themathqueen', 'vlad902'] pechersky
assignee:pechersky
120-18001
4 months ago
193-69446
193 days ago
74-59834
74 days
9820 jjaassoonn
author:jjaassoonn
 feat(RingTheory/GradedAlgebra/HomogeneousIdeal): generalize to homogeneous submodule The definitions, constructions and theorems in `HomogeneousIdeal.lean` are generalized to a homogeneous submodules. So say $R$ is a ring and $M \cong \bigoplus_{i} M_i$ is an $R$-module. Then a homogeneous $R$-submodule of $M$ is an $R$-submodule $N$ such that for all $i$ and $n \in N$, $n_i \in N$. Note that this notion doesn't actually require $R$ to be graded and $M$ is a graded module. But for more interesting lemmas, we do need that $M$ is graded $R$-module. We bake the fact $R$ is graded into the definition of homogeneous submodule, otherwise, `CompleteLattice HomogeneousSubmodule` cannot find the order of synthesis (the proof depends on that $R$ is graded) All definitions/constructions/theorems have a copy for ideals as well, this is to make sure dot notation still works. The motivation of this generalization is graded quotient module --- - [x] depends on:#18728 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-ring-theory 516/185 Mathlib/Algebra/Module/GradedModule.lean,Mathlib/AlgebraicGeometry/ProjectiveSpectrum/Scheme.lean,Mathlib/AlgebraicGeometry/ProjectiveSpectrum/Topology.lean,Mathlib/RingTheory/GradedAlgebra/Homogeneous/Ideal.lean,Mathlib/RingTheory/GradedAlgebra/Homogeneous/Submodule.lean,Mathlib/RingTheory/GradedAlgebra/Radical.lean,scripts/nolints_prime_decls.txt 7 3 ['github-actions', 'leanprover-community-bot-assistant'] nobody
102-44430
3 months ago
321-67671
321 days ago
52-59768
52 days
34931 eric-wieser
author:eric-wieser
 perf: make TensorProduct.lift irreducible with a unification hint --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra merge-conflict
label:t-algebra$
 6/2 Mathlib/LinearAlgebra/TensorProduct/Basic.lean 1 7 ['eric-wieser', 'github-actions', 'leanprover-radar', 'mathlib-merge-conflicts'] erdOne
assignee:erdOne
99-12450
3 months ago
99-12451
99 days ago
5-66655
5 days
33020 FormulaRabbit81
author:FormulaRabbit81
 chore(Topology): Deprecate file --- - [x] depends on: #30851 deprecation [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-topology large-import merge-conflict 82/49 Mathlib/Topology/Compactness/HilbertCubeEmbedding.lean,Mathlib/Topology/MetricSpace/HausdorffAlexandroff.lean,Mathlib/Topology/MetricSpace/PiNat.lean 3 3 ['github-actions', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
96-75461
3 months ago
155-62850
155 days ago
0-14835
4 hours
33281 michelsol
author:michelsol
 feat(Analysis/SpecialFunctions/Integrals): integral of 1/sqrt(1-x^2) and its integrability. Add the integral of the derivative of arcsin and its integrability. --- - [ ] depends on: #33280 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor merge-conflict t-analysis 59/0 Mathlib/Analysis/SpecialFunctions/Integrability/Basic.lean,Mathlib/Analysis/SpecialFunctions/Integrals/Basic.lean,Mathlib/MeasureTheory/Integral/IntervalIntegral/FundThmCalculus.lean 3 3 ['github-actions', 'mathlib-dependent-issues', 'mathlib4-merge-conflict-bot'] nobody
96-44255
3 months ago
148-12080
148 days ago
0-2872
47 minutes
34156 zcyemi
author:zcyemi
 feat(Analysis/Convex/Between): add lemmas on convex combination of mem simplex interior --- I add three lemmas of convex combinations preserving membership in the interior of a simplex. And also open a zulip thread [#mathlib4 > Best place for convex combination and simplex interior](https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/Best.20place.20for.20convex.20combination.20and.20simplex.20interior/with/568558406) deps: - [ ] depends on: #33852 t-analysis merge-conflict 170/0 Mathlib/Analysis/Convex/Between.lean,Mathlib/LinearAlgebra/AffineSpace/Independent.lean 2 3 ['github-actions', 'mathlib-dependent-issues', 'mathlib-merge-conflicts'] nobody
96-20172
3 months ago
96-20172
96 days ago
0-3761
1 hour
32918 michelsol
author:michelsol
 feat: define `supEdist` and `supDist` Create a new file Topology.MetricSpace.SupDistance and define the supremal distance in (extended) metric spaces. The defined `supEdist` and `supDist` will have similar theory to the already existing `infEdist` and `infDist`. The motivation is to be able to define the radius of a minimal bounding sphere as the infimum of the supDist later. [zulip discussion here](https://leanprover.zulipchat.com/#narrow/channel/116395-maths/topic/Formalizing.20Jung's.20theorem.20and.20minimal.20bounding.20spheres) t-topology new-contributor merge-conflict 75/0 Mathlib.lean,Mathlib/Topology/MetricSpace/SupDistance.lean 2 5 ['github-actions', 'mathlib4-merge-conflict-bot', 'michelsol', 'urkud'] nobody
95-14354
3 months ago
137-6739
137 days ago
21-3598
21 days
25980 Multramate
author:Multramate
 refactor(Algebra/Group/Submonoid/Operations): rename restrict to domRestrict and add restrict And update the documentation for consistency t-group-theory merge-conflict 145/123 Mathlib/Algebra/Group/Subgroup/Basic.lean,Mathlib/Algebra/Group/Subgroup/Ker.lean,Mathlib/Algebra/Group/Submonoid/Operations.lean,Mathlib/GroupTheory/FiniteAbelian/Duality.lean,Mathlib/GroupTheory/MonoidLocalization/Basic.lean,Mathlib/GroupTheory/MonoidLocalization/Maps.lean,Mathlib/GroupTheory/MonoidLocalization/MonoidWithZero.lean,Mathlib/GroupTheory/PGroup.lean,Mathlib/GroupTheory/QuotientGroup/Basic.lean,Mathlib/GroupTheory/Transfer.lean,Mathlib/LinearAlgebra/RootSystem/WeylGroup.lean,Mathlib/NumberTheory/NumberField/CMField.lean,Mathlib/NumberTheory/NumberField/Ideal/Basic.lean,Mathlib/RingTheory/Localization/Defs.lean 14 10 ['Multramate', 'copilot-pull-request-reviewer', 'github-actions', 'mathlib-merge-conflicts'] nobody
93-80700
3 months ago
93-80701
93 days ago
5-9216
5 days
25981 Multramate
author:Multramate
 feat(GroupTheory/GroupAction/Basic): define homomorphisms of fixed subgroups induced by homomorphisms of groups This PR continues the work from #10126. Original PR: https://github.com/leanprover-community/mathlib4/pull/10126 t-group-theory large-import merge-conflict 218/144 Mathlib/Algebra/Group/Subgroup/Basic.lean,Mathlib/Algebra/Group/Subgroup/Ker.lean,Mathlib/Algebra/Group/Submonoid/Operations.lean,Mathlib/Algebra/Ring/Action/Submonoid.lean,Mathlib/GroupTheory/FiniteAbelian/Duality.lean,Mathlib/GroupTheory/GroupAction/Defs.lean,Mathlib/GroupTheory/MonoidLocalization/Basic.lean,Mathlib/GroupTheory/MonoidLocalization/Maps.lean,Mathlib/GroupTheory/MonoidLocalization/MonoidWithZero.lean,Mathlib/GroupTheory/PGroup.lean,Mathlib/GroupTheory/QuotientGroup/Basic.lean,Mathlib/GroupTheory/Transfer.lean,Mathlib/LinearAlgebra/RootSystem/WeylGroup.lean,Mathlib/NumberTheory/NumberField/CMField.lean,Mathlib/NumberTheory/NumberField/Ideal/Basic.lean,Mathlib/RingTheory/Localization/Defs.lean 16 8 ['copilot-pull-request-reviewer', 'github-actions', 'mathlib-merge-conflicts'] nobody
93-80699
3 months ago
93-80699
93 days ago
4-78395
4 days
33795 alreadydone
author:alreadydone
 feat(Topology/Sheaves): LocalPredicate prerequisite for étalé spaces --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-topology merge-conflict 418/143 Mathlib/AlgebraicGeometry/ProjectiveSpectrum/StructureSheaf.lean,Mathlib/Geometry/Manifold/Sheaf/Smooth.lean,Mathlib/Logic/Equiv/Basic.lean,Mathlib/Topology/Sheaves/LocalPredicate.lean,Mathlib/Topology/Sheaves/Sheafify.lean,Mathlib/Topology/Sheaves/Stalks.lean 6 12 ['adamtopaz', 'alreadydone', 'dagurtomas', 'github-actions', 'mathlib-merge-conflicts'] adamtopaz
assignee:adamtopaz
93-58333
3 months ago
93-58334
93 days ago
34-21636
34 days
34674 Citronhat
author:Citronhat
 feat(Algebra/Order/Ring): replace ENNReal lemmas with WithTop versions * Add `WithTop` versions of basic multiplicative order lemmas. * Use the new `WithTop` lemmas to replace `ENNReal` proofs and address six TODOs. * Fix a typo in the `pos_of_ne_zero` alias name. new-contributor t-algebra merge-conflict
label:t-algebra$
 46/15 Mathlib/Algebra/Order/Monoid/Canonical/Defs.lean,Mathlib/Algebra/Order/Ring/WithTop.lean,Mathlib/Data/ENNReal/Operations.lean 3 5 ['Citronhat', 'Ruben-VandeVelde', 'github-actions', 'mathlib-merge-conflicts'] Ruben-VandeVelde
assignee:Ruben-VandeVelde
93-38203
3 months ago
93-38204
93 days ago
17-1225
17 days
33746 ster-oc
author:ster-oc
 feat(Algebra/Module/ZLattice): align `ZSpan.floor` to `Int.floor` API This PR adds some of the existent lemmas about `Int.floor`, `Int.ceil` and `Int.fract` to the `ZSpan` namespace. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra new-contributor merge-conflict
label:t-algebra$
 353/145 Mathlib/Algebra/Module/ZLattice/Basic.lean,Mathlib/Algebra/Order/Floor/Ring.lean,Mathlib/Topology/Algebra/Order/Floor.lean 3 8 ['github-actions', 'joelriou', 'mathlib-merge-conflicts', 'ster-oc'] joelriou
assignee:joelriou
88-55101
2 months ago
88-55101
88 days ago
30-23357
30 days
31595 astrainfinita
author:astrainfinita
 chore: redefine `Ideal.IsPrime` Redefine `Ideal.IsPrime` to make it correct for non-commutative cases --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra merge-conflict
label:t-algebra$
 333/100 Mathlib/Algebra/Order/Ring/Ordering/Defs.lean,Mathlib/RingTheory/DedekindDomain/Ideal/Lemmas.lean,Mathlib/RingTheory/GradedAlgebra/Radical.lean,Mathlib/RingTheory/Ideal/AssociatedPrime/Basic.lean,Mathlib/RingTheory/Ideal/Maps.lean,Mathlib/RingTheory/Ideal/Maximal.lean,Mathlib/RingTheory/Ideal/MinimalPrime/Noetherian.lean,Mathlib/RingTheory/Ideal/Oka.lean,Mathlib/RingTheory/Ideal/Operations.lean,Mathlib/RingTheory/Ideal/Over.lean,Mathlib/RingTheory/Ideal/Pointwise.lean,Mathlib/RingTheory/Ideal/Prime.lean,Mathlib/RingTheory/Ideal/Prod.lean,Mathlib/RingTheory/Ideal/Quotient/Basic.lean,Mathlib/RingTheory/Ideal/Quotient/Operations.lean,Mathlib/RingTheory/IsPrimary.lean,Mathlib/RingTheory/Localization/AtPrime/Basic.lean,Mathlib/RingTheory/Localization/Ideal.lean,Mathlib/RingTheory/Polynomial/Basic.lean,Mathlib/RingTheory/PrincipalIdealDomain.lean,Mathlib/RingTheory/Spectrum/Prime/Topology.lean,Mathlib/RingTheory/Valuation/Basic.lean 22 33 ['alreadydone', 'artie2000', 'astrainfinita', 'erdOne', 'github-actions', 'leanprover-bot', 'leanprover-radar', 'mathlib-merge-conflicts', 'mathlib4-merge-conflict-bot'] kim-em
assignee:kim-em
85-64663
2 months ago
54-61319
54 days ago
59-66521
59 days
33791 PhoenixIra
author:PhoenixIra
 feat: Generalization of FixedPointApproximants to CompletePartialOrder --- This PR provides a generalization of FixedPointApproximants to CompletePartialOrder. Not every theorem can be generalized, as sometimes we require additional conditions (namely `x ≤ f x`) in order to guarantee that the set is directed and thus the supremum is well-defined. This is not necessary in a CompleteLattice. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor t-order merge-conflict 223/100 Mathlib/Order/CompletePartialOrder.lean,Mathlib/SetTheory/Ordinal/FixedPointApproximants.lean 2 21 ['PhoenixIra', 'github-actions', 'mathlib-merge-conflicts', 'vihdzp'] PhoenixIra and vihdzp
assignee:PhoenixIra assignee:vihdzp
84-5435
2 months ago
84-5435
84 days ago
44-16098
44 days
26942 pechersky
author:pechersky
 feat(RingTheory/Valuation/ValueGroupIso): isomorphism of value groups when compatible and also to the ValuativeRel's value group by request from comment in https://github.com/leanprover-community/mathlib4/pull/26754#issuecomment-3051770901 - [ ] depends on: #26588 --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) - [x] depends on: #26939 - [x] depends on: #26940 - [x] depends on: #26941 merge-conflict t-ring-theory t-order 299/3 Mathlib.lean,Mathlib/Algebra/GroupWithZero/Range.lean,Mathlib/Algebra/Order/GroupWithZero/Range.lean,Mathlib/Algebra/Order/GroupWithZero/WithZero.lean,Mathlib/Algebra/Order/Monoid/WithTop.lean,Mathlib/RingTheory/Valuation/ValueGroupIso.lean 6 10 ['faenuccio', 'github-actions', 'mathlib-dependent-issues', 'mathlib4-merge-conflict-bot', 'pechersky'] faenuccio
assignee:faenuccio
81-36016
2 months ago
281-21426
281 days ago
10-67838
10 days
14712 astrainfinita
author:astrainfinita
 perf: change instance priority and order about `OfNat` --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict slow-typeclass-synthesis t-algebra
label:t-algebra$
 49/20 Mathlib/Algebra/Group/Nat.lean,Mathlib/Algebra/Group/ZeroOne.lean,Mathlib/Algebra/Homology/Embedding/Basic.lean,Mathlib/Algebra/Tropical/Basic.lean,Mathlib/Data/BitVec.lean,Mathlib/Data/Nat/Cast/Defs.lean,Mathlib/Data/Rat/Defs.lean,Mathlib/Data/UInt.lean,Mathlib/NumberTheory/ArithmeticFunction.lean 9 26 ['MichaelStollBayreuth', 'astrainfinita', 'eric-wieser', 'fpvandoorn', 'github-actions', 'j-loreaux', 'leanprover-bot', 'mathlib-bors'] nobody
77-35121
2 months ago
652-13291
652 days ago
20-15089
20 days
17627 hrmacbeth
author:hrmacbeth
 feat: universal properties of vector bundle constructions Characterizations for the smoothness of maps into the total spaces of (1) the direct sum of two vector bundles; (2) the pullback of a vector bundle. This gap in the library was exposed by #17358. --- - [x] depends on: #22804 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-differential-geometry 311/9 Mathlib/Data/Bundle.lean,Mathlib/Geometry/Manifold/VectorBundle/Basic.lean,Mathlib/Geometry/Manifold/VectorBundle/Pullback.lean,Mathlib/Topology/FiberBundle/Constructions.lean 4 26 ['PatrickMassot', 'fpvandoorn', 'github-actions', 'grunweg', 'hrmacbeth', 'j-loreaux', 'leanprover-community-bot-assistant', 'mathlib-bors', 'mathlib4-dependent-issues-bot', 'sgouezel'] grunweg
assignee:grunweg
77-35109
2 months ago
337-34848
337 days ago
91-68302
91 days
35215 kim-em
author:kim-em
 chore: use @[to_dual] in FixedPoints This PR adds `@[to_dual]` annotations to 14 theorems about `lfp` in `Order/FixedPoints.lean`, auto-generating their `gfp` duals and deleting the hand-written versions. Also registers `OrderHom.lfp` as the dual of `OrderHom.gfp` via `attribute [to_dual existing]`. Auto-generated duals include: `le_gfp`, `gfp_le_fixed`, `gfp_le`, `gfp_le_map`, `map_gfp`, `isFixedPt_gfp`, `map_le_gfp`, `isGreatest_gfp_le`, `isGreatest_gfp`, `gfp_induction`, `map_gfp_comp`, `gfp_gfp`, `map_inf_fixedPoints_le`, `map_sInf_subset_fixedPoints_le`. [Diff relative to #35208](https://github.com/kim-em/mathlib4/compare/kim/to-dual-bounds-basic...kim/to-dual-fixed-points) - [x] depends on: #35208 🤖 Prepared with Claude Code LLM-generated merge-conflict 249/548 Mathlib/Algebra/Module/Torsion/Basic.lean,Mathlib/Order/CompleteLattice/Basic.lean,Mathlib/Order/CompleteLattice/Defs.lean,Mathlib/Order/ConditionallyCompleteLattice/Defs.lean,Mathlib/Order/FixedPoints.lean,Mathlib/Order/GaloisConnection/Basic.lean,Mathlib/Order/Interval/Set/Disjoint.lean,Mathlib/Topology/Order.lean 8 11 ['JovanGerb', 'github-actions', 'kim-em', 'mathlib-dependent-issues', 'mathlib-merge-conflicts', 'vihdzp'] alexjbest
assignee:alexjbest
75-75784
2 months ago
63-18785
63 days ago
24-14816
24 days
36165 Parcly-Taxel
author:Parcly-Taxel
 chore: deprecate `Nat.strongRec(On)'` In favour of Batteries's `Nat.strongRec` for definitions and `Nat.strong_induction_on` for proofs. t-data merge-conflict 34/66 Mathlib/Analysis/Analytic/Inverse.lean,Mathlib/Data/Int/GCD.lean,Mathlib/Data/Nat/Factorization/Induction.lean,Mathlib/Data/Nat/Init.lean,Mathlib/Data/Set/Finite/Basic.lean,Mathlib/Data/ZMod/Basic.lean,Mathlib/GroupTheory/SpecificGroups/Cyclic.lean,Mathlib/Topology/EMetricSpace/Paracompact.lean 8 6 ['JovanGerb', 'MichaelStollBayreuth', 'Parcly-Taxel', 'Vierkantor', 'github-actions', 'mathlib-bors', 'mathlib-merge-conflicts'] Vierkantor
assignee:Vierkantor
75-33715
2 months ago
63-18775
63 days ago
15-53464
15 days
35042 JovanGerb
author:JovanGerb
 chore: remove `meta` form `import Mathlib.Tactic...` This PR cleans up some imports of the form `import Mathlib.Tactic...`, by either removing them entirely, or removing the `meta` keyword. It should never be necessary to `meta import` a file from `Mathlib.Tactic`, because the relevant definitions should already have been marked as `meta`. The motivation is to reduce the amount of files that are `meta` imported when writing e.g. `import Mathlib`, hence reducing the amount of stuff that needs to be loaded. There are more other `meta import`s that need to be removed, but this PR is a good start. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) large-import merge-conflict 61/142 Mathlib/Algebra/BigOperators/Group/Finset/Defs.lean,Mathlib/Algebra/FreeMonoid/Basic.lean,Mathlib/Algebra/Group/Action/Hom.lean,Mathlib/Algebra/Order/Group/Unbundled/Abs.lean,Mathlib/CategoryTheory/Functor/Basic.lean,Mathlib/Data/List/ChainOfFn.lean,Mathlib/Dynamics/OmegaLimit.lean,Mathlib/GroupTheory/GroupAction/Defs.lean,Mathlib/GroupTheory/GroupAction/DomAct/Basic.lean,Mathlib/Tactic/Algebraize.lean,Mathlib/Tactic/ApplyFun.lean,Mathlib/Tactic/ArithMult.lean,Mathlib/Tactic/Bound.lean,Mathlib/Tactic/CategoryTheory/Bicategory/Datatypes.lean,Mathlib/Tactic/CategoryTheory/Bicategory/Normalize.lean,Mathlib/Tactic/CategoryTheory/Bicategory/PureCoherence.lean,Mathlib/Tactic/CategoryTheory/CheckCompositions.lean,Mathlib/Tactic/CategoryTheory/Coherence/Basic.lean,Mathlib/Tactic/CategoryTheory/Coherence/Normalize.lean,Mathlib/Tactic/CategoryTheory/Coherence/PureCoherence.lean,Mathlib/Tactic/CategoryTheory/Elementwise.lean,Mathlib/Tactic/CategoryTheory/Monoidal/Datatypes.lean,Mathlib/Tactic/CategoryTheory/Monoidal/Normalize.lean,Mathlib/Tactic/CategoryTheory/Monoidal/PureCoherence.lean,Mathlib/Tactic/CategoryTheory/ToApp.lean,Mathlib/Tactic/Choose.lean,Mathlib/Tactic/DeclarationNames.lean,Mathlib/Tactic/DefEqTransformations.lean,Mathlib/Tactic/DeriveCountable.lean,Mathlib/Tactic/DeriveFintype.lean,Mathlib/Tactic/DeriveTraversable.lean,Mathlib/Tactic/ENatToNat.lean,Mathlib/Tactic/Explode.lean,Mathlib/Tactic/Explode/Pretty.lean,Mathlib/Tactic/FinCases.lean,Mathlib/Tactic/FunProp.lean,Mathlib/Tactic/FunProp/Attr.lean,Mathlib/Tactic/FunProp/Core.lean,Mathlib/Tactic/FunProp/FunctionData.lean,Mathlib/Tactic/FunProp/Theorems.lean,Mathlib/Tactic/FunProp/Types.lean,Mathlib/Tactic/GCongr/Core.lean,Mathlib/Tactic/GRewrite/Elab.lean,Mathlib/Tactic/Group.lean,Mathlib/Tactic/IrreducibleDef.lean,Mathlib/Tactic/Lift.lean,Mathlib/Tactic/Linarith.lean,Mathlib/Tactic/Linarith/Lemmas.lean,Mathlib/Tactic/Linarith/Oracle/FourierMotzkin.lean,Mathlib/Tactic/Linarith/Oracle/SimplexAlgorithm.lean,Mathlib/Tactic/Linarith/Oracle/SimplexAlgorithm/Gauss.lean,Mathlib/Tactic/Linarith/Oracle/SimplexAlgorithm/SimplexAlgorithm.lean,Mathlib/Tactic/Linarith/Preprocessing.lean,Mathlib/Tactic/Linarith/Verification.lean,Mathlib/Tactic/LinearCombination/Lemmas.lean,Mathlib/Tactic/Linter/DeprecatedSyntaxLinter.lean,Mathlib/Tactic/Linter/DocPrime.lean,Mathlib/Tactic/Linter/DocString.lean,Mathlib/Tactic/Linter/EmptyLine.lean,Mathlib/Tactic/Linter/FlexibleLinter.lean,Mathlib/Tactic/Linter/GlobalAttributeIn.lean,Mathlib/Tactic/Linter/HashCommandLinter.lean,Mathlib/Tactic/Linter/Multigoal.lean,Mathlib/Tactic/Linter/OldObtain.lean,Mathlib/Tactic/Linter/Style.lean,Mathlib/Tactic/Linter/TextBased.lean,Mathlib/Tactic/Linter/TextBased/UnicodeLinter.lean,Mathlib/Tactic/Linter/UnusedTactic.lean,Mathlib/Tactic/Linter/UnusedTacticExtension.lean,Mathlib/Tactic/MinImports.lean,Mathlib/Tactic/MoveAdd.lean,Mathlib/Tactic/Nontriviality/Core.lean,Mathlib/Tactic/NormNum/DivMod.lean,Mathlib/Tactic/NormNum/Ineq.lean,Mathlib/Tactic/NormNum/Prime.lean,Mathlib/Tactic/Order.lean,Mathlib/Tactic/Order/CollectFacts.lean,Mathlib/Tactic/Order/Graph/Tarjan.lean,Mathlib/Tactic/PNatToNat.lean,Mathlib/Tactic/Peel.lean,Mathlib/Tactic/ProdAssoc.lean,Mathlib/Tactic/ProxyType.lean,Mathlib/Tactic/Push.lean,Mathlib/Tactic/Qify.lean,Mathlib/Tactic/RSuffices.lean,Mathlib/Tactic/Ring/Basic.lean,Mathlib/Tactic/Ring/Common.lean,Mathlib/Tactic/Ring/Compare.lean,Mathlib/Tactic/Ring/PNat.lean,Mathlib/Tactic/Simproc/Divisors.lean,Mathlib/Tactic/Simproc/FinsetInterval.lean,Mathlib/Tactic/Simps/Basic.lean,Mathlib/Tactic/Subsingleton.lean,Mathlib/Tactic/TacticAnalysis/Declarations.lean,Mathlib/Tactic/TautoSet.lean,Mathlib/Tactic/Translate/Core.lean,Mathlib/Tactic/Translate/TagUnfoldBoundary.lean,Mathlib/Tactic/Widget/Calc.lean,Mathlib/Tactic/Widget/CommDiag.lean,Mathlib/Tactic/Widget/CongrM.lean 107 9 ['JovanGerb', 'dupuisf', 'github-actions', 'leanprover-radar', 'mathlib-merge-conflicts'] robin-carlier
assignee:robin-carlier
72-25065
2 months ago
67-48358
67 days ago
26-69911
26 days
36495 AlexKontorovich
author:AlexKontorovich
 chore(Finset/NatDivisors): refactor `card_divisors_mul` and `sum_divisors_mul` to not rely on `ArithmeticFunction` `Nat.Coprime.card_divisors_mul` and `Nat.Coprime.sum_divisors_mul` are moved to not rely on `ArithmeticFunction`. See zulip discussion here: [#mathlib4 > Library design question, e.g.`Nat.Coprime.card_divisors_mul` @ 💬](https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/Library.20design.20question.2C.20e.2Eg.2E.60Nat.2ECoprime.2Ecard_divisors_mul.60/near/577769899) Co-authored-by: Ziyan Wei and Aayush Rajasekaran --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) large-import t-number-theory t-algebra merge-conflict
label:t-algebra$
 45/14 Mathlib/Algebra/GCDMonoid/Basic.lean,Mathlib/Data/Finset/NatDivisors.lean,Mathlib/NumberTheory/ArithmeticFunction/Misc.lean 3 6 ['AlexKontorovich', 'arajasek', 'github-actions', 'mathlib-merge-conflicts'] riccardobrasca
assignee:riccardobrasca
72-8582
2 months ago
14-4946
14 days ago
53-21240
53 days
27534 PierreQuinton
author:PierreQuinton
 feat: a typeclass for `sSup`/`sInf` to be lawful Adds lawful infima and suprema type classes. A preorder with lawful suprema: whenever a set has a least upper bound, `sSup` returns a least upper bound for that set. A preorder with lawful infima: whenever a set has a greatest lower bound, `sInf` returns a greastest lower bound for that set. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-order 121/8 Mathlib.lean,Mathlib/Order/CompleteLattice/Defs.lean,Mathlib/Order/LawfulSupInf.lean 3 26 ['PierreQuinton', 'YaelDillies', 'github-actions', 'mathlib4-merge-conflict-bot', 'plp127', 'vihdzp'] nobody
69-19812
2 months ago
184-50887
184 days ago
114-37921
114 days
37530 mcdoll
author:mcdoll
 fix(Topology/Algebra): fix bad simps and make arguments implicit for `PointwiseConvergenceCLM` We delete all `simps` calls in the definitions of operators on `PointwiseConvergenceCLM` and replace them with `apply_apply` lemmas that do not abuse the defeq between `SLₚₜ` and `SL`. This made the linter discover some typeclass duplications, which we remove by restructuring the file. As a consequence of the new `simp` lemmas, we can remove all `set_option backward.isDefEq.respectTransparency false in` in `Analysis.Distribution.TemperedDistribution`. Moreover, we make several arguments implicit, which can be inferred in almost all practical situations. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) not-ready-to-merge merge-conflict 88/69 Mathlib/Analysis/Distribution/TemperedDistribution.lean,Mathlib/Topology/Algebra/Module/Spaces/PointwiseConvergenceCLM.lean 2 5 ['github-actions', 'jcommelin', 'mathlib-merge-conflicts', 'mcdoll'] nobody
33-55055
1 month ago
33-55056
33 days ago
14-59669
14 days
37593 IlPreteRosso
author:IlPreteRosso
 refactor(Data.Finset.*Antidiagonal): rename set-based defs to `set*Antidiagonal` Renames set-based `Finset.mulAntidiagonal` → `setMulAntidiagonal` (and SMul/VAdd variants) to free the `mulAntidiagonal` name for the planned `HasMulAntidiagonal` typeclass. Deprecation aliases added. Supersedes #34551 t-ring-theory new-contributor merge-conflict 178/96 Mathlib/Algebra/Order/Antidiag/Prod.lean,Mathlib/Data/Finset/MulAntidiagonal.lean,Mathlib/Data/Finset/SMulAntidiagonal.lean,Mathlib/RingTheory/HahnSeries/Multiplication.lean,Mathlib/RingTheory/HahnSeries/PowerSeries.lean,Mathlib/RingTheory/HahnSeries/Summable.lean 6 3 ['github-actions', 'mathlib-merge-conflicts'] nobody
33-55054
1 month ago
33-55055
33 days ago
15-61521
15 days
37444 vihdzp
author:vihdzp
 feat: typeclass for zero-dimensional spaces --- - [ ] depends on: #37317 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-topology large-import merge-conflict 151/110 Mathlib/Topology/Algebra/ClopenNhdofOne.lean,Mathlib/Topology/Category/LightProfinite/Basic.lean,Mathlib/Topology/Category/Profinite/Basic.lean,Mathlib/Topology/Category/Profinite/CofilteredLimit.lean,Mathlib/Topology/Category/Stonean/Basic.lean,Mathlib/Topology/ClopenBox.lean,Mathlib/Topology/Order.lean,Mathlib/Topology/Order/WithTop.lean,Mathlib/Topology/Separation/CompletelyRegular.lean,Mathlib/Topology/Separation/DisjointCover.lean,Mathlib/Topology/Separation/Lemmas.lean,Mathlib/Topology/Separation/Profinite.lean,Mathlib/Topology/UniformSpace/Ultra/Basic.lean 13 17 ['ADedecker', 'FernandoChu', 'github-actions', 'mathlib-dependent-issues', 'mathlib-merge-conflicts', 'vihdzp'] nobody
31-34338
1 month ago
31-35410
31 days ago
0-5306
1 hour
38239 vihdzp
author:vihdzp
 chore(Order/SuccPred/Limit): reorganize sections In an effort to keep the file better organized, we move theorems which use `SuccOrder`/`PredOrder` as an assumption to a new section. No theorems have been changed. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-order merge-conflict 95/110 Mathlib/Order/SuccPred/Limit.lean 1 2 ['github-actions', 'mathlib-merge-conflicts'] nobody
30-84632
1 month ago
30-84633
30 days ago
2-48556
2 days
37461 grunweg
author:grunweg
 chore: golf using the field tactic --- In the spirit of #31314. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict 32/43 Counterexamples/NowhereDifferentiable.lean,Mathlib/Analysis/Calculus/Monotone.lean,Mathlib/Analysis/Complex/BorelCaratheodory.lean,Mathlib/Analysis/MeanInequalities.lean,Mathlib/Analysis/Normed/Field/Lemmas.lean,Mathlib/Analysis/SpecialFunctions/Complex/LogBounds.lean,Mathlib/Analysis/SpecialFunctions/Elliptic/Weierstrass.lean,Mathlib/Analysis/SpecialFunctions/Integrals/Basic.lean,Mathlib/InformationTheory/KullbackLeibler/Basic.lean,Mathlib/LinearAlgebra/Lagrange.lean,Mathlib/MeasureTheory/Integral/MeanValue.lean,Mathlib/NumberTheory/ModularForms/Discriminant.lean,Mathlib/NumberTheory/ModularForms/EisensteinSeries/E2/Defs.lean,Mathlib/NumberTheory/ModularForms/EisensteinSeries/E2/MDifferentiable.lean,Mathlib/NumberTheory/ModularForms/QExpansion.lean,Mathlib/Probability/CentralLimitTheorem.lean,Mathlib/Probability/Distributions/Gaussian/CharFun.lean,Mathlib/RepresentationTheory/Homological/GroupCohomology/Hilbert90.lean,Mathlib/RingTheory/PowerSeries/Exp.lean,Mathlib/Topology/UnitInterval.lean 20 5 ['github-actions', 'grunweg', 'j-loreaux', 'mathlib-merge-conflicts'] nobody
28-84336
28 days ago
28-84337
28 days ago
22-59925
22 days
37774 weisbrja
author:weisbrja
 fix: change variables in `bicompl` to `Sort*` and add missing theorem mentioned in `bicompl` docs [#mathlib4 > Why does Mathlib use Type* instead of Sort* in some places?](https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/Why.20does.20Mathlib.20use.20Type.2A.20instead.20of.20Sort.2A.20in.20some.20places.3F/with/583882342) --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor t-logic merge-conflict 6/1 Mathlib/Logic/Function/Basic.lean 1 8 ['github-actions', 'kbuzzard', 'leanprover-radar', 'mathlib-merge-conflicts', 'weisbrja'] nobody
25-11564
25 days ago
25-11565
25 days ago
19-76858
19 days
36740 euprunin
author:euprunin
 chore: golf using `grind` The goal of this PR is to decrease the number of times lemmas are called explicitly. Any decrease in compilation time is a welcome side effect, although it is not a primary objective. Trace profiling results (differences <30 ms considered measurement noise): * `AlgebraicGeometry.Scheme.isBasis_affineOpens`: unchanged 🎉 * `SimpleGraph.Walk.takeUntil_eq_take`: 263 ms before, 180 ms after 🎉 * `SimpleGraph.Walk.dropUntil_eq_drop`: 382 ms before, 261 ms after 🎉 * `Int.image_Ico_emod`: unchanged 🎉 * `Equiv.Perm.ofSubtype_swap_eq`: unchanged 🎉 Profiled using `set_option trace.profiler true in`. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict 7/33 Mathlib/AlgebraicGeometry/AffineScheme.lean,Mathlib/Combinatorics/SimpleGraph/Walk/Decomp.lean,Mathlib/Data/Int/Interval.lean,Mathlib/GroupTheory/Perm/Support.lean 4 8 ['artie2000', 'chenson2018', 'github-actions', 'mathlib-merge-conflicts'] nobody
23-1027
23 days ago
23-1028
23 days ago
43-5868
43 days
37603 Parcly-Taxel
author:Parcly-Taxel
 refactor: review of `SetSemiring` * Rename `Set.up` and `SetSemiring.down` to `SetSemiring.ofSet` and `SetSemiring.toSet` respectively. Unprotect both and make them equivalences, following `FreeMonoid`. * Derive `CompleteAtomicBooleanAlgebra` for `SetSemiring` immediately. * Add `imageHom_id` and `imageHom_comp`. The three existing lemmas about `imageHom` are coalesced into `imageHom_apply`. Ultimately inspired by https://github.com/leanprover-community/mathlib4/pull/36934#issuecomment-4183475568. maintainer-merge merge-conflict 120/165 Mathlib/Algebra/Algebra/Operations.lean,Mathlib/Data/Set/Semiring.lean 2 42 ['Parcly-Taxel', 'YaelDillies', 'eric-wieser', 'github-actions', 'mathlib-merge-conflicts', 'sgouezel'] nobody
22-78817
22 days ago
22-78818
22 days ago
22-62470
22 days
38329 jcommelin
author:jcommelin
 chore: tighten down public/exposed API of AlgebraicClosure This PR tightens down the API of AlgebraicClosure, by making few parts of FieldTheory/IsAlgClosed/AlgebraicClosure.lean public and/or exposed. We still need to expose the main definition. It would be great if we can unexpose it in the future. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra merge-conflict
label:t-algebra$
 73/53 Mathlib/Algebra/Lie/TraceForm.lean,Mathlib/FieldTheory/AxGrothendieck.lean,Mathlib/FieldTheory/Differential/Liouville.lean,Mathlib/FieldTheory/IsAlgClosed/AlgebraicClosure.lean,Mathlib/ModelTheory/Algebra/Field/IsAlgClosed.lean,Mathlib/RingTheory/Discriminant.lean,Mathlib/RingTheory/IntegralClosure/IntegralRestrict.lean,Mathlib/RingTheory/Norm/Transitivity.lean,Mathlib/RingTheory/Trace/Basic.lean 9 26 ['eric-wieser', 'github-actions', 'jcommelin', 'kbuzzard', 'leanprover-radar', 'mathlib-merge-conflicts', 'plp127', 'riccardobrasca'] nobody
22-78800
22 days ago
22-78801
22 days ago
7-41851
7 days
37819 YellPika
author:YellPika
 feat(Order/OmegaCompletePartialOrder): add `OmegaCompletePartialOrder` instance for `WithBot` with basic `ωScottContinuous` lemmas This is a modification of #34093. See #34093 for details. --- - [x] depends on: #33941 - [x] depends on: #37258 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor t-order merge-conflict 337/10 Mathlib/Algebra/Order/Ring/WithTop.lean,Mathlib/Analysis/BoxIntegral/Box/Basic.lean,Mathlib/Order/Monotone/Basic.lean,Mathlib/Order/OmegaCompletePartialOrder.lean,Mathlib/Order/TypeTags.lean,Mathlib/Order/WithBot.lean 6 5 ['Komyyy', 'github-actions', 'mathlib-dependent-issues', 'mathlib-merge-conflicts'] Komyyy
assignee:Komyyy
21-62025
21 days ago
21-62025
21 days ago
22-11204
22 days
37053 artie2000
author:artie2000
 refactor(Analysis/Convex/Cone): use `PointedCone` in Riesz extension theorem Change the statement of the Riesz extension theorem to take a `PointedCone` rather than a `ConvexCone`. This PR is part of a series replacing `ConvexCone` with `PointedCone`. https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/Replacing.20.60ConvexCone.60.20with.20.60PointedCone.60/near/581184307 --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-convex-geometry maintainer-merge merge-conflict 15/12 Mathlib/Analysis/Convex/Cone/Extension.lean,Mathlib/Geometry/Convex/Cone/Pointed.lean 2 9 ['YaelDillies', 'artie2000', 'github-actions', 'mathlib-merge-conflicts', 'ocfnash'] nobody
11-630
11 days ago
11-631
11 days ago
46-71615
46 days
35217 kim-em
author:kim-em
 feat: auxiliary lemmas for Artin and braid groups This PR adds small lemmas to existing files, in preparation for the Artin groups and braid groups PRs. - `Commute.mul_pow_eq_one`: for commuting elements with `a ^ m = 1` and `b ^ m = 1` - `Equiv.Perm.swap_conjugate`: braid relation for adjacent transpositions - `Equiv.Perm.swap_mul_swap_comm_of_disjoint`: disjoint transpositions commute - `@[grind =]` attributes on `Perm.mul_apply`, `Perm.one_apply`; new `Perm.pow_add_one_apply` - `Subgroup.normalClosure_singleton_one` - `FreeGroup.ofList` and associated lemmas - `FreeGroup.freeGroupUnitMulEquivInt` - `PresentedGroup.instUniqueOfIsEmpty` - `CoxeterMatrix.Aₙ_adjacent`, `CoxeterMatrix.Aₙ_far` 🤖 Prepared with Claude Code t-group-theory LLM-generated merge-conflict 97/2 Mathlib/Algebra/Group/Commute/Defs.lean,Mathlib/Algebra/Group/End.lean,Mathlib/Algebra/Group/Subgroup/Basic.lean,Mathlib/GroupTheory/Coxeter/Matrix.lean,Mathlib/GroupTheory/FreeGroup/Basic.lean,Mathlib/GroupTheory/Perm/Cycle/Basic.lean,Mathlib/GroupTheory/PresentedGroup.lean 7 16 ['eric-wieser', 'github-actions', 'kim-em', 'mathlib-merge-conflicts', 'themathqueen'] thorimur
assignee:thorimur
8-78817
8 days ago
8-78817
8 days ago
20-78468
20 days
37553 grunweg
author:grunweg
 chore: golf using .ne and friends ne_of_gt -> .ne' ne_of_lt -> .ne le_of_lt -> .le Drive-by golfs using gcongr and positivity and been split into separate PRs. --- - [x] depends on: #37462 - [x] depends on: #37715 - [x] depends on: #37554 - [x] depends on: #37845 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict 302/321 Archive/Imo/Imo1981Q3.lean,Archive/Imo/Imo2011Q3.lean,Archive/Imo/Imo2013Q5.lean,Archive/Imo/Imo2019Q4.lean,Archive/Wiedijk100Theorems/CubingACube.lean,Counterexamples/DiscreteTopologyNonDiscreteUniformity.lean,Counterexamples/NowhereDifferentiable.lean,Counterexamples/TopologistsSineCurve.lean,Mathlib/Algebra/BigOperators/Fin.lean,Mathlib/Algebra/BigOperators/Group/List/Lemmas.lean,Mathlib/Algebra/CharP/Defs.lean,Mathlib/Algebra/Group/Fin/Basic.lean,Mathlib/Algebra/Group/Pointwise/Set/Finite.lean,Mathlib/Algebra/Lie/Nilpotent.lean,Mathlib/Algebra/Module/Torsion/Basic.lean,Mathlib/Algebra/Module/ZLattice/Basic.lean,Mathlib/Algebra/Module/ZLattice/Covolume.lean,Mathlib/Algebra/Order/Antidiag/Nat.lean,Mathlib/Algebra/Order/Archimedean/Basic.lean,Mathlib/Algebra/Order/Archimedean/Class.lean,Mathlib/Algebra/Order/BigOperators/Group/Multiset.lean,Mathlib/Algebra/Order/BigOperators/GroupWithZero/Finset.lean,Mathlib/Algebra/Order/CauSeq/Basic.lean,Mathlib/Algebra/Order/CauSeq/BigOperators.lean,Mathlib/Algebra/Order/CompleteField.lean,Mathlib/Algebra/Order/Field/Basic.lean,Mathlib/Algebra/Order/GroupWithZero/Range.lean,Mathlib/Algebra/Order/GroupWithZero/Unbundled/Basic.lean,Mathlib/Algebra/Order/Interval/Set/Instances.lean,Mathlib/Algebra/Order/Module/HahnEmbedding.lean,Mathlib/Algebra/Order/Ring/WithTop.lean,Mathlib/Algebra/Order/Round.lean,Mathlib/Algebra/Order/ToIntervalMod.lean,Mathlib/Algebra/Polynomial/DenomsClearable.lean,Mathlib/Algebra/Polynomial/EraseLead.lean,Mathlib/Algebra/Polynomial/Monic.lean,Mathlib/Algebra/QuadraticDiscriminant.lean,Mathlib/AlgebraicGeometry/ProjectiveSpectrum/Proper.lean,Mathlib/Analysis/Analytic/Composition.lean,Mathlib/Analysis/Analytic/Inverse.lean,Mathlib/Analysis/Analytic/OfScalars.lean,Mathlib/Analysis/Analytic/Uniqueness.lean,Mathlib/Analysis/Asymptotics/ExpGrowth.lean,Mathlib/Analysis/Asymptotics/LinearGrowth.lean,Mathlib/Analysis/Asymptotics/SpecificAsymptotics.lean,Mathlib/Analysis/Asymptotics/TVS.lean,Mathlib/Analysis/BoxIntegral/Basic.lean,Mathlib/Analysis/BoxIntegral/Partition/Tagged.lean,Mathlib/Analysis/Calculus/BumpFunction/FiniteDimension.lean,Mathlib/Analysis/Calculus/ContDiff/Defs.lean,Mathlib/Analysis/Calculus/ContDiff/FTaylorSeries.lean,Mathlib/Analysis/Calculus/DerivativeTest.lean,Mathlib/Analysis/Calculus/FDeriv/Extend.lean,Mathlib/Analysis/Calculus/FDeriv/Measurable.lean,Mathlib/Analysis/Calculus/IteratedDeriv/Defs.lean,Mathlib/Analysis/Calculus/LHopital.lean,Mathlib/Analysis/Complex/Exponential.lean,Mathlib/Analysis/Complex/Hadamard.lean,Mathlib/Analysis/Complex/OpenMapping.lean,Mathlib/Analysis/Complex/Poisson.lean,Mathlib/Analysis/Complex/Trigonometric.lean,Mathlib/Analysis/Convex/Between.lean,Mathlib/Analysis/Convex/Caratheodory.lean,Mathlib/Analysis/Convex/Combination.lean,Mathlib/Analysis/Convex/Gauge.lean,Mathlib/Analysis/Convex/Radon.lean,Mathlib/Analysis/Convex/SpecificFunctions/Deriv.lean,Mathlib/Analysis/Convolution.lean,Mathlib/Analysis/InnerProductSpace/Subspace.lean,Mathlib/Analysis/LocallyConvex/WithSeminorms.lean,Mathlib/Analysis/MeanInequalities.lean,Mathlib/Analysis/MeanInequalitiesPow.lean,Mathlib/Analysis/MellinInversion.lean,Mathlib/Analysis/MellinTransform.lean,Mathlib/Analysis/Normed/Field/Approximation.lean,Mathlib/Analysis/Normed/Module/FiniteDimension.lean,Mathlib/Analysis/Normed/Operator/ContinuousAlgEquiv.lean,Mathlib/Analysis/Normed/Ring/Units.lean,Mathlib/Analysis/Normed/Unbundled/IsPowMulFaithful.lean,Mathlib/Analysis/Normed/Unbundled/SmoothingSeminorm.lean,Mathlib/Analysis/Normed/Unbundled/SpectralNorm.lean,Mathlib/Analysis/Oscillation.lean,Mathlib/Analysis/Real/Hyperreal.lean,Mathlib/Analysis/Real/Pi/Bounds.lean,Mathlib/Analysis/SpecialFunctions/ContinuousFunctionalCalculus/Rpow/IntegralRepresentation.lean,Mathlib/Analysis/SpecialFunctions/Log/Basic.lean,Mathlib/Analysis/SpecialFunctions/PolarCoord.lean,Mathlib/Analysis/SpecialFunctions/Pow/NNReal.lean,Mathlib/Analysis/SpecialFunctions/Pow/Real.lean,Mathlib/Analysis/SpecialFunctions/Trigonometric/Basic.lean,Mathlib/Data/EReal/Inv.lean,Mathlib/Data/Finset/Image.lean,Mathlib/Data/Int/Interval.lean,Mathlib/Data/Int/ModEq.lean,Mathlib/Data/Nat/Bitwise.lean,Mathlib/Data/Nat/Lattice.lean,Mathlib/Data/Nat/Log.lean,Mathlib/Data/Nat/Multiplicity.lean,Mathlib/Data/Real/ConjExponents.lean,Mathlib/Dynamics/Circle/RotationNumber/TranslationNumber.lean 114 7 ['github-actions', 'mathlib-dependent-issues', 'mathlib-merge-conflicts'] nobody
8-78316
8 days ago
8-78316
8 days ago
13-66876
13 days
39229 grunweg
author:grunweg
 dev: towards `fun_prop` on manifolds --- - [ ] depends on: #39226 Rebased version of #31580. Meant to be a prototype that demonstrate how this could possibly work. Not functional yet; waiting on cache to continue. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-meta merge-conflict 305/1 Mathlib/Geometry/Manifold/Notation.lean,Mathlib/Tactic/FunProp/Core.lean,MathlibTest/DifferentialGeometry/FunPropM.lean,MathlibTest/fun_prop_dev.lean 4 4 ['github-actions', 'mathlib-dependent-issues', 'mathlib-merge-conflicts'] nobody
6-59206
6 days ago
10-72778
10 days ago
0-12
12 seconds
39287 xgenereux
author:xgenereux
 feat(Localization/AtPrime/Basic): upgrade `equivQuotMaximalIdeal` to an AlgEquiv The definition [IsLocalization.AtPrime.equivQuotMaximalIdealPow](https://leanprover-community.github.io/mathlib4_docs/Mathlib/RingTheory/Localization/AtPrime/Basic.html#IsLocalization.AtPrime.equivQuotMaximalIdealPow) was added in #36783. The case with `n = 1` is still important and interesting. I have upgraded it to an AlgEquiv using `equivQuotMaximalIdealPow`. This did break a few small things, because we need to bridge back to a `RingEquiv` in some places. I took the liberty to add some missing `apply` lemmas to ease fixing these proofs. Disclaimer: I used Claude to suggest the first shot and refined it from there. María Inés de Frutos Fernández <[mariaines.dff@gmail.com](mailto:mariaines.dff@gmail.com)> --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-ring-theory merge-conflict 45/68 Mathlib/RingTheory/Localization/AtPrime/Basic.lean,Mathlib/RingTheory/Localization/AtPrime/Extension.lean,Mathlib/RingTheory/Trace/Quotient.lean 3 2 ['github-actions', 'mathlib-merge-conflicts', 'wwylele'] nobody
4-80429
4 days ago
4-80430
4 days ago
4-53165
4 days
39329 lecopivo
author:lecopivo
 feat(fun_prop): eager application of transition theorems for fun_prop For properties like Integrable we want to apply transition theorems(like Continuous -> Integrable) eagerly --- This is a change necessary in preparation for making `fun_prop` work for integrability. --> [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-meta merge-conflict 93/30 Mathlib/Tactic/FunProp/Attr.lean,Mathlib/Tactic/FunProp/Core.lean,Mathlib/Tactic/FunProp/Decl.lean,MathlibTest/FunPropMinimal.lean 4 14 ['b-mehta', 'github-actions', 'lecopivo', 'mathlib-merge-conflicts'] JovanGerb
assignee:JovanGerb
4-19624
4 days ago
6-33572
6 days ago
1-47071
1 day
37584 kennethgoodman
author:kennethgoodman
 feat(Data/Nat/Fib): formalize Lamé's theorem ## Summary Formalize [Lamé's theorem](https://en.wikipedia.org/wiki/Lam%C3%A9%27s_theorem) (1844), the founding result of computational complexity theory. **Lamé's Theorem:** If the Euclidean algorithm on inputs `(a, b)` with `b ≤ a` takes `n + 1` division steps, then `b ≥ fib(n + 1)` and `a ≥ fib(n + 2)`. ### New definitions - `Nat.euclidSteps`: counts the number of division steps in the Euclidean algorithm on natural number inputs. ### New theorems - `Nat.fib_le_of_euclidSteps`: the main Lamé bound — Fibonacci lower bound on inputs given a step count. - `Nat.euclidSteps_le_of_lt_fib`: the contrapositive — step count upper bound given a Fibonacci bound on the smaller input. - `Nat.add_mod_le`: helper lemma that `b + a % b ≤ a` when `b ≤ a` and `0 < b`. ### Proof strategy Induction on `n`, tracking both elements of the pair. The key insight is that each Euclidean step replaces `(a, b)` with `(b, a % b)`, and since `a ≥ b + a % b` (because `a / b ≥ 1`), the Fibonacci recurrence `fib(n+3) = fib(n+2) + fib(n+1)` matches the structure of the algorithm. ### References - Gabriel Lamé, *Note sur la limite du nombre des divisions dans la recherche du plus grand commun diviseur entre deux nombres entiers*, Comptes rendus de l'Académie des sciences, 1844. --- ### AI usage disclosure Per the [Mathlib AI guidelines](https://leanprover-community.github.io/contribute/index.html#use-of-ai): Claude Code (Claude Opus 4.6) was used to assist with writing the Lean 4 proof code, fixing tactic errors, and drafting this PR description. The mathematical proof (induction on step count, tracking both pair elements through the Fibonacci recurrence) was designed by hand and verified on paper before formalization. I have reviewed and understand every line of the resulting Lean code and can explain all proof steps. --- - [x] builds cleanly (`lake build Mathlib.Data.Nat.Fib.Lame`) - [x] no `sorry` - [x] lines ≤ 100 characters, no trailing whitespace - [x] `autoImplicit false` - [x] docstrings on all public declarations new-contributor LLM-generated t-data merge-conflict 121/0 Mathlib.lean,Mathlib/Data/Nat/Basic.lean,Mathlib/Data/Nat/Fib/Basic.lean,Mathlib/Data/Nat/Fib/Lame.lean,docs/1000.yaml 5 25 ['euprunin', 'github-actions', 'kennethgoodman', 'mathlib-merge-conflicts', 'vihdzp', 'wwylele'] TwoFX
assignee:TwoFX
4-8297
4 days ago
4-8298
4 days ago
44-66371
44 days
38036 JovanGerb
author:JovanGerb
 feat: `NSMul`/`NPow` type class This PR is adds `NSMul`, `NPow`, `ZSMul` and `ZPow` classes for the `nsmul`, `npow`, `zsmul`, `zpow` data fields. This has a few advantages: - If you first declare a `SMul` instance, then you don't need to manually write `nsmul := (· • ·)` and `zsmul := (· • ·)` . For `Pow`, the extra benefit is that inferring the instance is preferred over the default field `npowRecAuto`. So this helps avoid accidental diamonds. - If you first declare a `SMul` instance on a type synonym, then `inferInstanceAs` will infer the `nsmul` field from the `SMul` instance. This makes it easier to avoid diamonds on type synonyms like `Matrix` and `MonoidAlgebra`. - The not-yet-merged instance diamond linter will be able to detect cases where the `NSMul` and `SMul` classes do not agree. In the process of making this PR, I have identified two existing `NPow` diamonds: - In `Mathlib.Algebra.Order.Positive.Field`, there were two conflicting `NPow` instances. - For `Fin`, there are two conflicting `NPow` instances. I have overwritten the one in core lean with the one from mathlib that is more computationally efficient. TODO: the same for `QSMul` and `NNQSMul`. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict 276/273 Mathlib/Algebra/Colimit/DirectLimit.lean,Mathlib/Algebra/FreeAlgebra.lean,Mathlib/Algebra/Group/Action/Opposite.lean,Mathlib/Algebra/Group/Defs.lean,Mathlib/Algebra/Group/Ext.lean,Mathlib/Algebra/Group/Int/Defs.lean,Mathlib/Algebra/Group/Opposite.lean,Mathlib/Algebra/Group/Prod.lean,Mathlib/Algebra/Group/Submonoid/Membership.lean,Mathlib/Algebra/Group/TypeTags/Basic.lean,Mathlib/Algebra/Group/Units/Defs.lean,Mathlib/Algebra/GroupWithZero/Action/Opposite.lean,Mathlib/Algebra/Module/NatInt.lean,Mathlib/Algebra/MonoidAlgebra/Defs.lean,Mathlib/Algebra/Order/Monoid/Unbundled/WithTop.lean,Mathlib/Algebra/Order/Positive/Field.lean,Mathlib/Algebra/Order/Ring/Archimedean.lean,Mathlib/Algebra/Order/Ring/WithTop.lean,Mathlib/Algebra/Ring/MinimalAxioms.lean,Mathlib/Algebra/RingQuot.lean,Mathlib/CategoryTheory/Triangulated/Basic.lean,Mathlib/Data/BitVec.lean,Mathlib/Data/Complex/Basic.lean,Mathlib/Data/Rat/Defs.lean,Mathlib/Data/ZMod/Defs.lean,Mathlib/Data/ZMod/IntUnitsPower.lean,Mathlib/FieldTheory/RatFunc/Basic.lean,Mathlib/GroupTheory/GroupAction/Hom.lean,Mathlib/LinearAlgebra/Matrix/Defs.lean,Mathlib/LinearAlgebra/Matrix/ZPow.lean,Mathlib/LinearAlgebra/TensorProduct/Basic.lean,Mathlib/LinearAlgebra/TensorProduct/Defs.lean,Mathlib/NumberTheory/ArithmeticFunction/Defs.lean,Mathlib/RingTheory/PolynomialLaw/Basic.lean,Mathlib/RingTheory/Valuation/ValuativeRel/Basic.lean,Mathlib/SetTheory/Cardinal/Order.lean,Mathlib/Tactic/Abel.lean,Mathlib/Tactic/Translate/ToAdditive.lean,Mathlib/Topology/Algebra/GroupCompletion.lean,Mathlib/Topology/Algebra/Module/LinearMap.lean,MathlibTest/instance_diamonds.lean 41 17 ['JovanGerb', 'eric-wieser', 'github-actions', 'jcommelin', 'leanprover-radar', 'mathlib-merge-conflicts', 'vihdzp'] nobody
1-78260
1 day ago
1-78261
1 day ago
29-38312
29 days
39102 yuanyi-350
author:yuanyi-350
 chore: reduce imports in 50 files --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-analysis merge-conflict 70/81 Mathlib/Analysis/BoxIntegral/Box/Basic.lean,Mathlib/Analysis/BoxIntegral/Box/SubboxInduction.lean,Mathlib/Analysis/BoxIntegral/DivergenceTheorem.lean,Mathlib/Analysis/Calculus/Taylor.lean,Mathlib/Analysis/Calculus/UniformLimitsDeriv.lean,Mathlib/Analysis/Distribution/DerivNotation.lean,Mathlib/Analysis/Distribution/SchwartzSpace/Basic.lean,Mathlib/Analysis/Distribution/SchwartzSpace/Deriv.lean,Mathlib/Analysis/Distribution/Sobolev.lean,Mathlib/Analysis/LocallyConvex/AbsConvex.lean,Mathlib/Analysis/LocallyConvex/Barrelled.lean,Mathlib/Analysis/LocallyConvex/ContinuousOfBounded.lean,Mathlib/Analysis/LocallyConvex/Montel.lean,Mathlib/Analysis/LocallyConvex/PointwiseConvergence.lean,Mathlib/Analysis/LocallyConvex/SeparatingDual.lean,Mathlib/Analysis/LocallyConvex/WeakDual.lean,Mathlib/Analysis/LocallyConvex/WeakOperatorTopology.lean,Mathlib/Analysis/LocallyConvex/WeakSpace.lean,Mathlib/Analysis/Meromorphic/Divisor.lean,Mathlib/Analysis/Normed/Affine/AddTorsor.lean,Mathlib/Analysis/Normed/Affine/AddTorsorBases.lean,Mathlib/Analysis/Normed/Affine/Convex.lean,Mathlib/Analysis/Normed/Algebra/Basic.lean,Mathlib/Analysis/Normed/Algebra/Exponential.lean,Mathlib/Analysis/Normed/Algebra/MatrixExponential.lean,Mathlib/Analysis/Normed/Algebra/QuaternionExponential.lean,Mathlib/Analysis/Normed/Algebra/UnitizationL1.lean,Mathlib/Analysis/Normed/Field/Dense.lean,Mathlib/Analysis/Normed/Field/Instances.lean,Mathlib/Analysis/Normed/Field/Ultra.lean,Mathlib/Analysis/Normed/Group/AddCircle.lean,Mathlib/Analysis/Normed/Group/Bounded.lean,Mathlib/Analysis/Normed/Group/ControlledClosure.lean,Mathlib/Analysis/Normed/Group/FunctionSeries.lean,Mathlib/Analysis/Normed/Group/Indicator.lean,Mathlib/Analysis/Normed/Group/NullSubmodule.lean,Mathlib/Analysis/Normed/Group/Tannery.lean,Mathlib/Analysis/Normed/Group/Ultra.lean,Mathlib/Analysis/Normed/Lp/WithLp.lean,Mathlib/Analysis/Normed/MulAction.lean,Mathlib/Analysis/ODE/PicardLindelof.lean,Mathlib/Analysis/ODE/Transform.lean,Mathlib/Analysis/Oscillation.lean,Mathlib/Analysis/PSeriesComplex.lean,Mathlib/Analysis/SpecificLimits/Fibonacci.lean,Mathlib/Analysis/SpecificLimits/FloorPow.lean,Mathlib/Analysis/Subadditive.lean,Mathlib/Analysis/SumIntegralComparisons.lean 48 13 ['JovanGerb', 'YaelDillies', 'bryangingechen', 'github-actions', 'j-loreaux', 'leanprover-radar', 'mathlib-merge-conflicts', 'yuanyi-350'] j-loreaux
assignee:j-loreaux
1-78253
1 day ago
1-78254
1 day ago
11-63042
11 days
39155 mathlib-nolints
author:mathlib-nolints
 chore: lake shake --add-public --keep-implied --keep-prefix --fix I am happy to shake some imports for you! **381 files changed** · +406 imports added · -346 imports removed --- [workflow run for this PR](https://github.com/leanprover-community/mathlib4/actions/runs/26001831423) [explain.txt](https://github.com/leanprover-community/mathlib4/actions/runs/26001831423/artifacts/7045805363) large-import merge-conflict 406/346 Mathlib/Algebra/Algebra/Unitization.lean,Mathlib/Algebra/BigOperators/Finprod.lean,Mathlib/Algebra/BigOperators/Group/List/Basic.lean,Mathlib/Algebra/BigOperators/Intervals.lean,Mathlib/Algebra/Category/MonCat/Colimits.lean,Mathlib/Algebra/Category/MonCat/FilteredColimits.lean,Mathlib/Algebra/Category/Ring/Topology.lean,Mathlib/Algebra/Free.lean,Mathlib/Algebra/Group/Conj.lean,Mathlib/Algebra/Group/Subgroup/Basic.lean,Mathlib/Algebra/Group/Subgroup/Ker.lean,Mathlib/Algebra/Group/Submonoid/Saturation.lean,Mathlib/Algebra/Group/Submonoid/Support.lean,Mathlib/Algebra/Group/Units/Basic.lean,Mathlib/Algebra/Homology/DerivedCategory/Ext/Map.lean,Mathlib/Algebra/Homology/DerivedCategory/Ext/MapBijective.lean,Mathlib/Algebra/Homology/HomologicalComplexAbelian.lean,Mathlib/Algebra/Homology/ModelCategory/Injective.lean,Mathlib/Algebra/Homology/ModelCategory/Lifting.lean,Mathlib/Algebra/Lie/CartanCriterion.lean,Mathlib/Algebra/LinearRecurrence.lean,Mathlib/Algebra/Module/Injective.lean,Mathlib/Algebra/Module/SpanRank.lean,Mathlib/Algebra/Module/Submodule/Invariant.lean,Mathlib/Algebra/Module/Submodule/Pointwise.lean,Mathlib/Algebra/MonoidAlgebra/Defs.lean,Mathlib/Algebra/MvPolynomial/Cardinal.lean,Mathlib/Algebra/MvPolynomial/Division.lean,Mathlib/Algebra/MvPolynomial/Equiv.lean,Mathlib/Algebra/MvPolynomial/Funext.lean,Mathlib/Algebra/MvPolynomial/Nilpotent.lean,Mathlib/Algebra/NonAssoc/PreLie/Basic.lean,Mathlib/Algebra/Order/Archimedean/Class.lean,Mathlib/Algebra/Order/Archimedean/Submonoid.lean,Mathlib/Algebra/Order/BigOperators/GroupWithZero/Finset.lean,Mathlib/Algebra/Order/CauSeq/BigOperators.lean,Mathlib/Algebra/Order/Field/Pointwise.lean,Mathlib/Algebra/Order/Group/Indicator.lean,Mathlib/Algebra/Order/Monoid/Canonical/Defs.lean,Mathlib/Algebra/Order/Ring/Archimedean.lean,Mathlib/Algebra/Order/Ring/Cast.lean,Mathlib/Algebra/Order/SuccPred.lean,Mathlib/Algebra/Polynomial/Eval/Coeff.lean,Mathlib/Algebra/Regular/Defs.lean,Mathlib/Algebra/Tropical/Basic.lean,Mathlib/AlgebraicGeometry/Modules/Tilde.lean,Mathlib/AlgebraicGeometry/Morphisms/Finite.lean,Mathlib/AlgebraicGeometry/Morphisms/FlatRank.lean,Mathlib/AlgebraicGeometry/Morphisms/SchemeTheoreticallyDominant.lean,Mathlib/AlgebraicGeometry/Morphisms/UniversallyClosed.lean,Mathlib/AlgebraicGeometry/Morphisms/WeaklyEtale.lean,Mathlib/AlgebraicGeometry/Noetherian.lean,Mathlib/AlgebraicTopology/SimplicialCategory/Basic.lean,Mathlib/AlgebraicTopology/SimplicialComplex/Basic.lean,Mathlib/AlgebraicTopology/SimplicialSet/Boundary.lean,Mathlib/AlgebraicTopology/SimplicialSet/Monoidal.lean,Mathlib/AlgebraicTopology/SimplicialSet/NonDegenerateSimplices.lean,Mathlib/AlgebraicTopology/SimplicialSet/NonDegenerateSimplicesSubcomplex.lean,Mathlib/Analysis/Asymptotics/Lemmas.lean,Mathlib/Analysis/Asymptotics/TVS.lean,Mathlib/Analysis/CStarAlgebra/Projection.lean,Mathlib/Analysis/Calculus/DerivativeTest.lean,Mathlib/Analysis/Calculus/FDeriv/Affine.lean,Mathlib/Analysis/Calculus/Implicit.lean,Mathlib/Analysis/Calculus/LogDeriv.lean,Mathlib/Analysis/Complex/CanonicalDecomposition.lean,Mathlib/Analysis/Complex/Harmonic/Liouville.lean,Mathlib/Analysis/Complex/Harmonic/Poisson.lean,Mathlib/Analysis/Complex/JensenFormula.lean,Mathlib/Analysis/Complex/Schwarz.lean,Mathlib/Analysis/Complex/UpperHalfPlane/Manifold.lean,Mathlib/Analysis/ConstantSpeed.lean,Mathlib/Analysis/Convex/Approximation.lean,Mathlib/Analysis/Convex/FunctionTopology.lean,Mathlib/Analysis/Convex/Segment.lean,Mathlib/Analysis/Distribution/SchwartzSpace/Basic.lean,Mathlib/Analysis/InnerProductSpace/Positive.lean,Mathlib/Analysis/LocallyConvex/Polar.lean,Mathlib/Analysis/Normed/Module/Bases.lean,Mathlib/Analysis/Normed/Module/Complemented.lean,Mathlib/Analysis/Normed/Module/DoubleDual.lean,Mathlib/Analysis/Normed/Module/Dual.lean,Mathlib/Analysis/ODE/DiscreteGronwall.lean,Mathlib/Analysis/RCLike/ContinuousMap.lean,Mathlib/Analysis/SpecialFunctions/ContinuousFunctionalCalculus/Rpow/RingInverseOrder.lean,Mathlib/Analysis/SpecialFunctions/Stirling.lean,Mathlib/Analysis/SpecialFunctions/Trigonometric/Chebyshev/ChebyshevGauss.lean,Mathlib/CategoryTheory/Abelian/Preradical/Colon.lean,Mathlib/CategoryTheory/Adhesive/Subobject.lean,Mathlib/CategoryTheory/CopyDiscardCategory/Widesubcategory.lean,Mathlib/CategoryTheory/Functor/ReflectsIso/Jointly.lean,Mathlib/CategoryTheory/Limits/Constructions/WidePullbackOfTerminal.lean,Mathlib/CategoryTheory/Limits/FunctorCategory/Shapes/Terminal.lean,Mathlib/CategoryTheory/Limits/Preserves/SigmaConst.lean,Mathlib/CategoryTheory/Limits/Preserves/Yoneda.lean,Mathlib/CategoryTheory/Limits/Yoneda.lean,Mathlib/CategoryTheory/Monoidal/Cartesian/Normal.lean,Mathlib/CategoryTheory/Monoidal/Internal/Limits.lean,Mathlib/CategoryTheory/Monoidal/Mon.lean,Mathlib/CategoryTheory/Monoidal/Widesubcategory.lean 381 27 ['JovanGerb', 'MichaelStollBayreuth', 'bryangingechen', 'github-actions', 'leanprover-radar', 'mathlib-merge-conflicts'] nobody
1-78252
1 day ago
1-78253
1 day ago
5-71867
5 days
39399 Brian-Nugent
author:Brian-Nugent
 feat(Algebra/CategoryTheory/ModuleCat): Locally Free Sheaves This PR gives a definition of locally free sheaves in terms of first defining a predicate IsLocallyFree for [SheafOfModules.LocalGeneratorsData](https://leanprover-community.github.io/mathlib4_docs/Mathlib/Algebra/Category/ModuleCat/Sheaf/Generators.html#SheafOfModules.LocalGeneratorsData). --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra t-category-theory merge-conflict
label:t-algebra$
 207/5 Mathlib.lean,Mathlib/Algebra/Category/ModuleCat/Sheaf/Generators.lean,Mathlib/Algebra/Category/ModuleCat/Sheaf/LocallyFree.lean,Mathlib/Algebra/Category/ModuleCat/Sheaf/Quasicoherent.lean 4 11 ['Brian-Nugent', 'github-actions', 'mathlib-merge-conflicts', 'robin-carlier'] dagurtomas
assignee:dagurtomas
1-78247
1 day ago
1-78248
1 day ago
5-61168
5 days
39509 mcdoll
author:mcdoll
 chore(Topology): add `push/pull_end` tags for CLMs Simpsets were introduced in #38359, see also #39508 --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-topology merge-conflict 2/0 Mathlib/Topology/Algebra/Module/LinearMap.lean 1 2 ['github-actions', 'mathlib-merge-conflicts'] j-loreaux
assignee:j-loreaux
1-74197
1 day ago
1-78245
1 day ago
3-40182
3 days
16074 Rida-Hamadani
author:Rida-Hamadani
 feat: combinatorial maps and planar graphs We define combinatorial maps, then we define planar graph using combinatorial maps. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-combinatorics 243/0 Mathlib.lean,Mathlib/Combinatorics/SimpleGraph/Planar.lean,Mathlib/Data/CombinatorialMap.lean 3 31 ['JMR-Independent', 'MrBrain295', 'Parcly-Taxel', 'Rida-Hamadani', 'github-actions', 'lambda-fairy', 'leanprover-community-bot-assistant'] kmill
assignee:kmill
0-55922
15 hours ago
321-65200
321 days ago
72-50365
72 days
39428 harahu
author:harahu
 chore: add an empty line after module headers This makes the docs easier to read. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict 121/4 Archive/Imo/Imo1998Q2.lean,Archive/Imo/Imo2001Q6.lean,Archive/Imo/Imo2005Q3.lean,Archive/Imo/Imo2008Q2.lean,Archive/Imo/Imo2008Q3.lean,Archive/Imo/Imo2008Q4.lean,Counterexamples/DiscreteTopologyNonDiscreteUniformity.lean,Counterexamples/PeanoCurve.lean,Counterexamples/Pseudoelement.lean,Mathlib/Algebra/Algebra/Spectrum/Basic.lean,Mathlib/Algebra/Category/Grp/EpiMono.lean,Mathlib/Algebra/Category/ModuleCat/Stalk.lean,Mathlib/Algebra/EuclideanDomain/Field.lean,Mathlib/Algebra/EuclideanDomain/Int.lean,Mathlib/Algebra/Homology/Opposite.lean,Mathlib/Algebra/Lie/Cochain.lean,Mathlib/Algebra/Lie/Extension.lean,Mathlib/Algebra/Lie/Loop.lean,Mathlib/Algebra/MonoidAlgebra/PointwiseSMul.lean,Mathlib/Algebra/Order/AddTorsor.lean,Mathlib/Algebra/Order/Archimedean/IndicatorCard.lean,Mathlib/Algebra/Squarefree/Basic.lean,Mathlib/Algebra/Vertex/HVertexOperator.lean,Mathlib/Algebra/Vertex/VertexOperator.lean,Mathlib/AlgebraicTopology/FundamentalGroupoid/Product.lean,Mathlib/AlgebraicTopology/FundamentalGroupoid/SimplyConnected.lean,Mathlib/Analysis/Analytic/RadiusLiminf.lean,Mathlib/Analysis/Normed/Affine/Convex.lean,Mathlib/Analysis/Normed/Lp/PiLp.lean,Mathlib/Analysis/Normed/Lp/ProdLp.lean,Mathlib/Analysis/Normed/Unbundled/SeminormFromBounded.lean,Mathlib/Analysis/Normed/Unbundled/SmoothingSeminorm.lean,Mathlib/CategoryTheory/DinatTrans.lean,Mathlib/CategoryTheory/Limits/Preserves/Filtered.lean,Mathlib/CategoryTheory/Limits/Shapes/Pullback/HasPullback.lean,Mathlib/CategoryTheory/PathCategory/Basic.lean,Mathlib/CategoryTheory/Preadditive/Schur.lean,Mathlib/CategoryTheory/Sites/Abelian.lean,Mathlib/CategoryTheory/Sites/LeftExact.lean,Mathlib/CategoryTheory/Thin.lean,Mathlib/Combinatorics/Configuration.lean,Mathlib/Data/Bracket.lean,Mathlib/Data/Bundle.lean,Mathlib/Data/Finsupp/BigOperators.lean,Mathlib/Data/Nat/Squarefree.lean,Mathlib/Data/PSigma/Order.lean,Mathlib/Data/SProd.lean,Mathlib/Data/Set/Enumerate.lean,Mathlib/Data/Set/UnionLift.lean,Mathlib/Dynamics/TopologicalEntropy/CoverEntropy.lean,Mathlib/Dynamics/TopologicalEntropy/NetEntropy.lean,Mathlib/Dynamics/TopologicalEntropy/Semiconj.lean,Mathlib/FieldTheory/RatFunc/AsPolynomial.lean,Mathlib/Geometry/Manifold/Algebra/Monoid.lean,Mathlib/Geometry/Manifold/Diffeomorph.lean,Mathlib/Geometry/Manifold/IsManifold/InteriorBoundary.lean,Mathlib/GroupTheory/CommutingProbability.lean,Mathlib/LinearAlgebra/Multilinear/Curry.lean,Mathlib/LinearAlgebra/RootSystem/Finite/CanonicalBilinear.lean,Mathlib/LinearAlgebra/RootSystem/Hom.lean,Mathlib/LinearAlgebra/RootSystem/OfBilinear.lean,Mathlib/LinearAlgebra/RootSystem/RootPairingCat.lean,Mathlib/LinearAlgebra/RootSystem/WeylGroup.lean,Mathlib/Logic/Lemmas.lean,Mathlib/MeasureTheory/Function/EssSup.lean,Mathlib/MeasureTheory/Group/Prod.lean,Mathlib/ModelTheory/PartialEquiv.lean,Mathlib/NumberTheory/ClassNumber/AdmissibleAbs.lean,Mathlib/NumberTheory/ClassNumber/AdmissibleAbsoluteValue.lean,Mathlib/NumberTheory/ClassNumber/Finite.lean,Mathlib/NumberTheory/Cyclotomic/Discriminant.lean,Mathlib/NumberTheory/Cyclotomic/PrimitiveRoots.lean,Mathlib/NumberTheory/FLT/Four.lean,Mathlib/NumberTheory/FLT/Three.lean,Mathlib/NumberTheory/NumberField/Basic.lean,Mathlib/NumberTheory/NumberField/Completion/FinitePlace.lean,Mathlib/NumberTheory/NumberField/Cyclotomic/Basic.lean,Mathlib/NumberTheory/NumberField/Cyclotomic/Embeddings.lean,Mathlib/NumberTheory/NumberField/Cyclotomic/PID.lean,Mathlib/NumberTheory/NumberField/Cyclotomic/Three.lean,Mathlib/NumberTheory/NumberField/Discriminant/Basic.lean,Mathlib/NumberTheory/NumberField/Discriminant/Defs.lean,Mathlib/NumberTheory/NumberField/EquivReindex.lean,Mathlib/NumberTheory/NumberField/ExistsRamified.lean,Mathlib/NumberTheory/NumberField/House.lean,Mathlib/NumberTheory/NumberField/Norm.lean,Mathlib/NumberTheory/NumberField/Units/DirichletTheorem.lean,Mathlib/Order/Bounded.lean,Mathlib/Probability/Distributions/Uniform.lean,Mathlib/RepresentationTheory/Rep/Res.lean,Mathlib/RingTheory/AdicCompletion/RingHom.lean,Mathlib/RingTheory/Conductor.lean,Mathlib/RingTheory/Coprime/Lemmas.lean,Mathlib/RingTheory/DedekindDomain/AdicValuation.lean,Mathlib/RingTheory/DedekindDomain/FiniteAdeleRing.lean,Mathlib/RingTheory/DedekindDomain/Instances.lean,Mathlib/RingTheory/HahnSeries/Addition.lean,Mathlib/RingTheory/HahnSeries/Binomial.lean,Mathlib/RingTheory/HahnSeries/Multiplication.lean,Mathlib/RingTheory/HahnSeries/PowerSeries.lean 121 2 ['github-actions', 'mathlib-merge-conflicts'] nobody
0-45020
12 hours ago
0-45021
12 hours ago
6-54148
6 days
39637 mcdoll
author:mcdoll
 feat(Topology/Algebra): use `Is*Apply` for `ContinuousLinearMap` This is the first in many PRs that use the new `Is*Apply` classes instead of structure specific `foo_apply` lemmas. The main bulk of the PR is in Mathlib/Topology/Algebra/Module/ContinuousLinearMap/Basic.lean, everything else is just fixing errors. For each `foo` in `zero`, `one`, `add`, `sub`, `neg`, smul` we do the following: - add an instance `IsFooApply` - rename `coe_foo` to `toLinearMap_foo` - depreprecate `coe_foo`, `coe_foo'`, and `foo_apply` We are rather conservative when it comes to the instances, in future PRs this will be used more. --- Note to maintainers: please don't put multiple PRs regarding `Is*Apply` on the queue, they will most likely create merge conflicts. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-topology merge-conflict 311/306 Archive/Sensitivity.lean,Mathlib/Algebra/Category/ModuleCat/Topology/Basic.lean,Mathlib/Algebra/Category/ModuleCat/Topology/Homology.lean,Mathlib/Analysis/Analytic/Binomial.lean,Mathlib/Analysis/Analytic/IteratedFDeriv.lean,Mathlib/Analysis/CStarAlgebra/CStarMatrix.lean,Mathlib/Analysis/CStarAlgebra/Multiplier.lean,Mathlib/Analysis/CStarAlgebra/Unitization.lean,Mathlib/Analysis/Calculus/ContDiff/FaaDiBruno.lean,Mathlib/Analysis/Calculus/ContDiff/Operations.lean,Mathlib/Analysis/Calculus/Darboux.lean,Mathlib/Analysis/Calculus/Deriv/Add.lean,Mathlib/Analysis/Calculus/Deriv/Basic.lean,Mathlib/Analysis/Calculus/Deriv/CompMul.lean,Mathlib/Analysis/Calculus/Deriv/Mul.lean,Mathlib/Analysis/Calculus/FDeriv/Add.lean,Mathlib/Analysis/Calculus/FDeriv/Analytic.lean,Mathlib/Analysis/Calculus/FDeriv/Norm.lean,Mathlib/Analysis/Calculus/FDeriv/Symmetric.lean,Mathlib/Analysis/Calculus/FormalMultilinearSeries.lean,Mathlib/Analysis/Calculus/Implicit.lean,Mathlib/Analysis/Calculus/UniformLimitsDeriv.lean,Mathlib/Analysis/Calculus/VectorField.lean,Mathlib/Analysis/Complex/CauchyIntegral.lean,Mathlib/Analysis/Complex/Harmonic/Analytic.lean,Mathlib/Analysis/Convex/Birkhoff.lean,Mathlib/Analysis/Convex/DoublyStochasticMatrix.lean,Mathlib/Analysis/Convex/Exposed.lean,Mathlib/Analysis/Convolution.lean,Mathlib/Analysis/Distribution/ContDiffMapSupportedIn.lean,Mathlib/Analysis/Fourier/FourierTransform.lean,Mathlib/Analysis/Fourier/FourierTransformDeriv.lean,Mathlib/Analysis/InnerProductSpace/Adjoint.lean,Mathlib/Analysis/InnerProductSpace/ConformalLinearMap.lean,Mathlib/Analysis/InnerProductSpace/Dual.lean,Mathlib/Analysis/InnerProductSpace/LinearMap.lean,Mathlib/Analysis/InnerProductSpace/PiL2.lean,Mathlib/Analysis/InnerProductSpace/Projection/Basic.lean,Mathlib/Analysis/InnerProductSpace/Projection/FiniteDimensional.lean,Mathlib/Analysis/InnerProductSpace/Rayleigh.lean,Mathlib/Analysis/InnerProductSpace/Reproducing.lean,Mathlib/Analysis/InnerProductSpace/StarOrder.lean,Mathlib/Analysis/InnerProductSpace/Symmetric.lean,Mathlib/Analysis/LocallyConvex/Separation.lean,Mathlib/Analysis/Normed/Group/SeparationQuotient.lean,Mathlib/Analysis/Normed/Module/Bases.lean,Mathlib/Analysis/Normed/Module/Multilinear/Basic.lean,Mathlib/Analysis/Normed/Module/PiTensorProduct/InjectiveSeminorm.lean,Mathlib/Analysis/Normed/Operator/Bilinear.lean,Mathlib/Analysis/Normed/Operator/Compact/Basic.lean,Mathlib/Analysis/Normed/Operator/ContinuousAlgEquiv.lean,Mathlib/Analysis/Normed/Operator/Mul.lean,Mathlib/Analysis/SpecialFunctions/Exponential.lean,Mathlib/Analysis/SpecialFunctions/Pow/Deriv.lean,Mathlib/Geometry/Euclidean/Volume/Measure.lean,Mathlib/Geometry/Manifold/IntegralCurve/Basic.lean,Mathlib/Geometry/Manifold/IntegralCurve/Transform.lean,Mathlib/Geometry/Manifold/VectorField/LieBracket.lean,Mathlib/LinearAlgebra/Eigenspace/ContinuousLinearMap.lean,Mathlib/MeasureTheory/Function/Jacobian.lean,Mathlib/MeasureTheory/Function/JacobianOneDim.lean,Mathlib/MeasureTheory/Group/Prod.lean,Mathlib/MeasureTheory/Integral/Bochner/L1.lean,Mathlib/MeasureTheory/Integral/FinMeasAdditive.lean,Mathlib/MeasureTheory/Integral/IntervalIntegral/Basic.lean,Mathlib/MeasureTheory/Integral/Lebesgue/Basic.lean,Mathlib/MeasureTheory/Measure/Haar/DistribChar.lean,Mathlib/MeasureTheory/Measure/Haar/MulEquivHaarChar.lean,Mathlib/MeasureTheory/Measure/Typeclasses/Finite.lean,Mathlib/MeasureTheory/VectorMeasure/Decomposition/Hahn.lean,Mathlib/MeasureTheory/VectorMeasure/Decomposition/Jordan.lean,Mathlib/NumberTheory/Modular.lean,Mathlib/NumberTheory/ModularForms/CongruenceSubgroups.lean,Mathlib/NumberTheory/ModularForms/JacobiTheta/TwoVariable.lean,Mathlib/NumberTheory/NumberField/CanonicalEmbedding/Basic.lean,Mathlib/NumberTheory/NumberField/CanonicalEmbedding/NormLeOne.lean,Mathlib/NumberTheory/Padics/PadicNumbers.lean,Mathlib/NumberTheory/SiegelsLemma.lean,Mathlib/Probability/Distributions/Gaussian/Basic.lean,Mathlib/Probability/Distributions/Gaussian/Fernique.lean,Mathlib/Probability/Distributions/Uniform.lean,Mathlib/Topology/Algebra/Module/ContinuousLinearMap/Basic.lean,Mathlib/Topology/Algebra/Module/FiniteDimensionBilinear.lean,Mathlib/Topology/ContinuousMap/StoneWeierstrass.lean,scripts/nolints_prime_decls.txt 85 6 ['github-actions', 'leanprover-radar', 'mathlib-merge-conflicts', 'mcdoll'] nobody
0-45013
12 hours ago
0-45014
12 hours ago
0-49000
13 hours

Stale new contributor PRs

Number Author Title Description Labels +/- Modified files (first 100) 📝 💬 All users who commented or reviewed Assignee(s) Updated Last status change total time in review
14563 awueth
author:awueth
 feat: if-then-else of exclusive or statement --- If `¬(P ∧ Q)` then `ite (P ∨ Q) a 1 = (ite P a 1) * (ite Q a 1)` [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) awaiting-author t-algebra new-contributor
label:t-algebra$
 5/0 Mathlib/Algebra/Group/Basic.lean 1 3 ['eric-wieser', 'github-actions', 'kim-em'] nobody
645-42141
1 year ago
676-2723
676 days ago
6-38745
6 days
12751 Command-Master
author:Command-Master
 feat: add lemmas for Nat/Bits, Nat/Bitwise and Nat/Size Remove `@[simp]` from `Nat.bit_false` and `Nat.bit_true`, as `bit0` and `bit1` are deprecated, and add some lemmas to `Bits`, `Bitwise` and `Size`. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-data new-contributor 66/7 Mathlib/Data/Nat/Bits.lean,Mathlib/Data/Nat/Bitwise.lean,Mathlib/Data/Nat/Multiplicity.lean,Mathlib/Data/Nat/Size.lean 4 26 ['Command-Master', 'Rida-Hamadani', 'Ruben-VandeVelde', 'YaelDillies', 'github-actions', 'jcommelin'] nobody
641-27050
1 year ago
676-33272
676 days ago
56-40668
56 days
14669 Command-Master
author:Command-Master
 feat(Data/Nat/PartENat): add lemmas for PartENat Add some missing lemmas for `PartENat`, as well as the additive homomorphism from it to `WithTop Int`. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) awaiting-author t-data new-contributor merge-conflict 90/0 Mathlib/Data/Nat/PartENat.lean 1 4 ['erdOne', 'github-actions', 'mathlib-merge-conflicts', 'urkud'] nobody
628-38940
1 year ago
679-46462
679 days ago
0-6775
1 hour
15121 Eloitor
author:Eloitor
 feat: iff theorems for IsSplitEpi and IsSplitMono in opposite category --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) awaiting-author t-category-theory new-contributor 40/0 Mathlib/CategoryTheory/EpiMono.lean 1 3 ['github-actions', 'joelriou', 'mattrobball'] nobody
628-1885
1 year ago
659-47544
659 days ago
7-3203
7 days
14242 js2357
author:js2357
 feat: Prove equivalence of `isDedekindDomain` and `isDedekindDomainDvr` Prove that `isDedekindDomainDvr` is equivalent to both `isDedekindDomain` and `isDedekindDomainInv`. Specifically, prove `isDedekindDomainDvr A → isDedekindDomainInv A`, because `isDedekindDomain A → isDedekindDomainDvr A` and `IsDedekindDomain A ↔ IsDedekindDomainInv A` are already in Mathlib. - [x] depends on: #14099 - [x] depends on: #14216 - [ ] depends on: #14237 --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-algebra blocked-by-other-PR new-contributor
label:t-algebra$
 269/1 Mathlib.lean,Mathlib/RingTheory/DedekindDomain/Dvr.lean,Mathlib/RingTheory/FractionalIdeal/LocalizedAtPrime.lean,Mathlib/RingTheory/Localization/Basic.lean 4 2 ['github-actions', 'leanprover-community-mathlib4-bot'] nobody
605-12944
1 year ago
693-1891
693 days ago
0-273
4 minutes
16887 metinersin
author:metinersin
 feat(ModelTheory/Complexity): define conjunctive and disjunctive formulas Defines `FirstOrder.Language.BoundedFormula.IsConjunctive` and `FirstOrder.Language.BoundedFormula.IsDisjunctive`. --- - [ ] depends on: #16885 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict blocked-by-other-PR new-contributor t-logic 300/7 Mathlib/ModelTheory/Complexity.lean,Mathlib/ModelTheory/Equivalence.lean,Mathlib/ModelTheory/Syntax.lean 3 2 ['github-actions', 'mathlib4-dependent-issues-bot'] nobody
597-8922
1 year ago
612-36996
612 days ago
0-1299
21 minutes
16888 metinersin
author:metinersin
 feat(ModelTheory/Complexity): Define conjunctive and disjunctive normal forms Define `FirstOrder.Language.BoundedFormula.IsDNF` and `FirstOrder.Language.BoundedFormula.IsCNF`. --- - [ ] depends on: #16887 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict blocked-by-other-PR new-contributor t-logic 415/7 Mathlib/ModelTheory/Complexity.lean,Mathlib/ModelTheory/Equivalence.lean,Mathlib/ModelTheory/Syntax.lean 3 2 ['github-actions', 'mathlib4-dependent-issues-bot'] nobody
597-8922
1 year ago
612-36997
612 days ago
0-1045
17 minutes
16889 metinersin
author:metinersin
 feat(ModelTheory/Complexity): Normal forms Defines `FirstOrder.Language.BoundedFormula.toDNF` and `FirstOrder.Language.BoundedFormula.toCNF` - given a quantifier-free formula, these construct a semantically equivalent formula in disjunctive normal form and conjunctive normal form, respectively. --- - [ ] depends on: #16888 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict blocked-by-other-PR new-contributor t-logic 525/7 Mathlib/ModelTheory/Complexity.lean,Mathlib/ModelTheory/Equivalence.lean,Mathlib/ModelTheory/Syntax.lean 3 2 ['github-actions', 'mathlib4-dependent-issues-bot'] nobody
597-8921
1 year ago
612-32747
612 days ago
0-613
10 minutes
14619 Command-Master
author:Command-Master
 chore: Merge `Trunc` to `Squash` Remove `Trunc` and use `Squash` instead --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict WIP new-contributor 197/211 Mathlib/CategoryTheory/EpiMono.lean,Mathlib/CategoryTheory/Preadditive/Biproducts.lean,Mathlib/Data/DFinsupp/Basic.lean,Mathlib/Data/Fintype/Basic.lean,Mathlib/Data/Fintype/Card.lean,Mathlib/Data/Fintype/Option.lean,Mathlib/Data/Fintype/Perm.lean,Mathlib/Data/Fintype/Quotient.lean,Mathlib/Data/Quot.lean,Mathlib/Data/Semiquot.lean,Mathlib/GroupTheory/Perm/Cycle/Factors.lean,Mathlib/GroupTheory/Perm/Sign.lean,Mathlib/Logic/Equiv/List.lean 13 3 ['Command-Master', 'github-actions', 'vihdzp'] nobody
587-55472
1 year ago
unknown
0-0
0 seconds
12750 Command-Master
author:Command-Master
 feat: define Gray code --- Define binary reflected gray code, both as a permutation of `Nat` and as a permutation of `BitVec n`, and prove some theorems about them. Additionally, remove `@[simp]` from `Nat.bit_false` and `Nat.bit_true`, as `bit0` and `bit1` are deprecated, and add some lemmas to `Bits`, `Bitwise` and `Size`. - [ ] depends on: #12751 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) blocked-by-other-PR t-data new-contributor merge-conflict awaiting-author 226/0 Mathlib.lean,Mathlib/Data/Nat/Bits.lean,Mathlib/Data/Nat/Bitwise.lean,Mathlib/Data/Nat/GrayCode.lean,Mathlib/Data/Nat/Size.lean 5 5 ['Rida-Hamadani', 'alreadydone', 'github-actions', 'grunweg', 'leanprover-community-mathlib4-bot'] nobody
579-31579
1 year ago
728-13677
728 days ago
16-49744
16 days
14598 Command-Master
author:Command-Master
 chore: add typeclasses to unify various `add_top`, `add_eq_top`, etc. Add the four typeclasses `IsTopAbsorbing`, `IsBotAbsorbing`, `NoTopSum`, `NoBotSum`, as additive equivalents for `MulZeroClass` and `NoZeroDivisors`. Add instances of these for `ENNReal`, `WithTop α`, `WithBot α`, `PUnit`, `EReal`, `PartENat`, `Measure`, `Interval` and `Filter`. Also split `Algebra/Order/AddGroupWithTop` to `Algebra/Order/Group/WithTop` and `Algebra/Order/Monoid/WithTop` --- Previous usages of lemmas with quantified names like `WithTop.add_top` have to be changed to just `add_top`. `add_lt_top` is `@[simp]`, in accordance with `ENNReal.add_lt_top` being `@[simp]`. This affects `WithTop.add_lt_top` which previously hadn't been `@[simp]`. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-algebra t-order new-contributor
label:t-algebra$
 264/195 Archive/Wiedijk100Theorems/BallotProblem.lean,Mathlib.lean,Mathlib/Algebra/Order/Group/WithTop.lean,Mathlib/Algebra/Order/GroupWithZero/Canonical.lean,Mathlib/Algebra/Order/Interval/Basic.lean,Mathlib/Algebra/Order/Monoid/Unbundled/Basic.lean,Mathlib/Algebra/Order/Monoid/Unbundled/Defs.lean,Mathlib/Algebra/Order/Monoid/Unbundled/WithTop.lean,Mathlib/Algebra/Order/Monoid/WithTop.lean,Mathlib/Algebra/PUnitInstances/Order.lean,Mathlib/Algebra/Polynomial/Degree/Definitions.lean,Mathlib/Algebra/Polynomial/Monic.lean,Mathlib/Algebra/Tropical/Basic.lean,Mathlib/Analysis/Analytic/Meromorphic.lean,Mathlib/Analysis/Normed/Lp/ProdLp.lean,Mathlib/Analysis/NormedSpace/ENorm.lean,Mathlib/Analysis/SpecialFunctions/JapaneseBracket.lean,Mathlib/Analysis/SpecialFunctions/Log/ENNRealLog.lean,Mathlib/Data/ENNReal/Operations.lean,Mathlib/Data/ENat/Basic.lean,Mathlib/Data/Nat/PartENat.lean,Mathlib/Data/Nat/WithBot.lean,Mathlib/Data/Real/EReal.lean,Mathlib/LinearAlgebra/Lagrange.lean,Mathlib/MeasureTheory/Covering/Differentiation.lean,Mathlib/MeasureTheory/Decomposition/Lebesgue.lean,Mathlib/MeasureTheory/Function/ConditionalExpectation/CondexpL1.lean,Mathlib/MeasureTheory/Function/Jacobian.lean,Mathlib/MeasureTheory/Function/L1Space.lean,Mathlib/MeasureTheory/Function/L2Space.lean,Mathlib/MeasureTheory/Function/LpSeminorm/Basic.lean,Mathlib/MeasureTheory/Function/LpSeminorm/TriangleInequality.lean,Mathlib/MeasureTheory/Function/LpSpace.lean,Mathlib/MeasureTheory/Function/StronglyMeasurable/Basic.lean,Mathlib/MeasureTheory/Function/UniformIntegrable.lean,Mathlib/MeasureTheory/Integral/Bochner.lean,Mathlib/MeasureTheory/Integral/MeanInequalities.lean,Mathlib/MeasureTheory/Integral/SetIntegral.lean,Mathlib/MeasureTheory/Integral/VitaliCaratheodory.lean,Mathlib/MeasureTheory/Measure/Hausdorff.lean,Mathlib/MeasureTheory/Measure/Lebesgue/Basic.lean,Mathlib/MeasureTheory/Measure/LevyProkhorovMetric.lean,Mathlib/MeasureTheory/Measure/MeasureSpace.lean,Mathlib/MeasureTheory/Measure/MeasureSpaceDef.lean,Mathlib/MeasureTheory/Measure/Regular.lean,Mathlib/MeasureTheory/Measure/Typeclasses.lean,Mathlib/NumberTheory/Padics/PadicNumbers.lean,Mathlib/Order/Filter/Pointwise.lean,Mathlib/Probability/Kernel/Defs.lean,Mathlib/Probability/Martingale/Convergence.lean,Mathlib/RingTheory/Multiplicity.lean,Mathlib/RingTheory/MvPowerSeries/NoZeroDivisors.lean,Mathlib/RingTheory/UniqueFactorizationDomain.lean,Mathlib/Topology/EMetricSpace/Defs.lean,Mathlib/Topology/MetricSpace/Bounded.lean,Mathlib/Topology/MetricSpace/HausdorffDistance.lean,Mathlib/Topology/MetricSpace/Lipschitz.lean 57 30 ['Command-Master', 'YaelDillies', 'github-actions'] nobody
562-59855
1 year ago
562-59855
562 days ago
7-45599
7 days
16885 metinersin
author:metinersin
 feat(ModelTheory/Complexity): define literals Defines `FirstOrder.Language.BoundedFormula.IsLiteral` and `FirstOrder.Language.BoundedFormula.simpleNot` - an auxiliary operation that takes the negation of a formula and does some simplification. --- - [x] depends on: #16800 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict awaiting-author new-contributor t-logic 148/5 Mathlib/ModelTheory/Complexity.lean,Mathlib/ModelTheory/Equivalence.lean,Mathlib/ModelTheory/Semantics.lean,Mathlib/ModelTheory/Syntax.lean 4 20 ['YaelDillies', 'awainverse', 'github-actions', 'mathlib4-dependent-issues-bot', 'metinersin'] nobody
560-15976
1 year ago
596-5288
596 days ago
0-19926
5 hours
13248 hcWang942
author:hcWang942
 feat: basic concepts of auction theory ## Description Formalise some core concepts and results in auction theory: this includes definitions for first-price and second-price auctions, as well as several fundamental results and helping lemmas. This is the very first PR of the project formalizing core concepts and results in auction theory. Our group is working on more contributions on the formalization of game theory prefix. Co-authored-by: Ma Jiajun ## Reference Roughgarden, Tim. ***Twenty Lectures on Algorithmic Game Theory***. Cambridge University Press, 2020. [Link](https://www.cambridge.org/core/books/twenty-lectures-on-algorithmic-game-theory/A9D9427C8F43E7DAEF8C702755B6D72B) --- - [x] Will depend on #14163 once that PR is merged. The Fintype lemmas introduced by this PR have been added in that PR and will be removed from here once that PR gets merged ## Current plan for formalization of Game Theory The current plan for the formalizing of Game Theory include: #### 1. Auction Theory. 🎉 _(200+ lines, this PR)_ - Essential definitions of Sealed-bid auction, First-price auction and Second-price auction. - First-price auction has no dominant strategy. - Second-price auction has dominant strategy. (Second-price auction is DSIC) #### 2. Mechanism design & Myerson's Lemma. 🎉 (400+ lines, pending for modification to Mathlib Standard) - Mechanism design An allocation rule is implementable if there exists - Dominant Strategy Incentive Compatible (DSIC) payment rule - An allocation rule is monotone if for every bidder’s gain is nondecreasing w.r.t. her/his bid - Myerson's Lemma Implementable ⇔ Monotone In the above case, the DSIC payment rule is unique. #### 3. von Neumann‘s Minimax Theorem. 🎉 (800+ lines, pending for modification to Mathlib Standard) - Equilibrium in zero sum game - Formalization strategy: via Loomis’s theorem. #### 4. Nash Equilibrium. 🎉 (pending for modification to Mathlib Standard) #### 5. Brouwer fixed-point theorem. (Work in Progress) #### 6. More Mechanism design. (Planning) merge-conflict awaiting-author new-contributor t-logic 204/0 Mathlib.lean,Mathlib/GameTheory/Auction/Basic.lean,docs/references.bib 3 148 ['Shreyas4991', 'YaelDillies', 'eric-wieser', 'faenuccio', 'github-actions', 'grunweg', 'hcWang942', 'tb65536', 'urkud', 'vihdzp'] hcWang942
assignee:hcWang942
555-54808
1 year ago
569-40996
569 days ago
109-82807
109 days
19125 yhtq
author:yhtq
 feat: add theorems to transfer `IsGalois` between pairs of fraction rings feat: add theorems to transfer `IsGalois` between pairs of fraction rings. - [x] depends on: #18404 - [x] depends on: #19124 --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-algebra new-contributor
label:t-algebra$
 121/0 Mathlib.lean,Mathlib/FieldTheory/Galois/IsFractionRing.lean,Mathlib/RingTheory/Localization/FractionRing.lean 3 3 ['github-actions', 'mathlib4-dependent-issues-bot', 'tb65536'] nobody
525-77225
1 year ago
552-38607
552 days ago
0-1980
33 minutes
17739 Aaron1011
author:Aaron1011
 feat(Topology/Order/DenselyOrdered): prove Not (IsOpen) for intervals Prove that Iic/Ici/Ioc/Ico/Icc intervals are not open in densely ordered topologies with no min/max element --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict awaiting-author t-topology new-contributor 27/0 Mathlib/Topology/Order/DenselyOrdered.lean 1 8 ['github-actions', 'vihdzp'] nobody
492-12837
1 year ago
585-4407
585 days ago
0-4704
1 hour
15711 znssong
author:znssong
 feat(Combinatorics/SimpleGraph): Some lemmas about walk, cycle and Hamiltonian cycle --- These lemmas are separated from the `meow-sister/BondyChvatal` branch and will be needed for the proof of the Bondy-Chvátal theorem. - [x] depends on: #15536 - [x] depends on: #16294 merge-conflict awaiting-author t-combinatorics new-contributor 407/3 Mathlib/Combinatorics/SimpleGraph/Finite.lean,Mathlib/Combinatorics/SimpleGraph/Hamiltonian.lean,Mathlib/Combinatorics/SimpleGraph/Path.lean,Mathlib/Combinatorics/SimpleGraph/Walk.lean 4 22 ['Rida-Hamadani', 'YaelDillies', 'github-actions', 'mathlib4-dependent-issues-bot', 'znssong'] nobody
491-31923
1 year ago
612-43084
612 days ago
9-13962
9 days
15720 znssong
author:znssong
 feat(SimpleGraph): The Bondy-Chvátal theorem The proof of the Bondy-Chvátal theorem, with Dirac's theorem and Ore's theorem as its corollary. - [x] depends on: #15536 - [ ] depends on: #15711 - [ ] depends on: #15578 merge-conflict blocked-by-other-PR t-combinatorics new-contributor 903/3 Mathlib.lean,Mathlib/Combinatorics/SimpleGraph/BondyChvatal.lean,Mathlib/Combinatorics/SimpleGraph/Finite.lean,Mathlib/Combinatorics/SimpleGraph/Hamiltonian.lean,Mathlib/Combinatorics/SimpleGraph/Path.lean,Mathlib/Combinatorics/SimpleGraph/Walk.lean,Mathlib/Dynamics/FixedPoints/Basic.lean,Mathlib/Dynamics/FixedPoints/Increasing.lean 8 3 ['github-actions', 'grunweg'] nobody
491-31923
1 year ago
648-49277
648 days ago
0-1791
29 minutes
18629 tomaz1502
author:tomaz1502
 feat(Computability.Timed): Formalization of runtime complexity of List.merge This PR adds the formalization of the runtime complexity of the merge function, defined in `Data/List/Sort`. Requires: https://github.com/leanprover-community/mathlib4/pull/15450 References: - Previous PR on mathlib3: https://github.com/leanprover-community/mathlib3/pull/14494/ - First discussion on Zulip: https://leanprover.zulipchat.com/#narrow/stream/113488-general/topic/BSc.20Final.20Project/near/220647062 - Second disussion on Zulip: https://leanprover.zulipchat.com/#narrow/stream/113488-general/topic/Formalization.20of.20Runtime.20Complexity.20of.20Sorting.20Algorithms/near/284184450 --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-computability awaiting-author new-contributor 186/0 Mathlib.lean,Mathlib/Computability/Timed/InsertionSort.lean,Mathlib/Computability/Timed/Merge.lean 3 2 ['github-actions', 'trivial1711'] nobody
490-84242
1 year ago
530-83855
530 days ago
33-11262
33 days
18461 hannahfechtner
author:hannahfechtner
 feat: left and right common multiples mixins add mixins for left and right common multiples. These carry the data of what factors are used to create the common multiples --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) awaiting-author t-algebra new-contributor
label:t-algebra$
 78/0 Mathlib/Algebra/Group/Defs.lean 1 13 ['github-actions', 'hannahfechtner', 'jcommelin', 'kbuzzard', 'kim-em', 'trivial1711'] nobody
487-45422
1 year ago
487-45422
487 days ago
69-35596
69 days
19291 PieterCuijpers
author:PieterCuijpers
 feat(Algebra/Order/Hom): add quantale homomorphism Definition of quantale homomorphisms as functions that are both semigroup homomorphisms and complete lattice homomorphisms. --- - [x] depends on: #19810 - [x] depends on: #19811 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict awaiting-author t-algebra new-contributor
label:t-algebra$
 209/0 Mathlib.lean,Mathlib/Algebra/Order/Hom/Quantale.lean,scripts/noshake.json 3 29 ['PieterCuijpers', 'YaelDillies', 'github-actions', 'kim-em', 'mathlib4-dependent-issues-bot'] nobody
486-19501
1 year ago
491-73302
491 days ago
29-51482
29 days
20372 jvlmdr
author:jvlmdr
 feat(MeasureTheory/Function): Add ContinuousLinearMap.bilinearCompLp(L) Introduce ContinuousLinearMap.bilinearCompLp and bilinearCompLpL. Generalize eLpNorm_le_eLpNorm_mul_eLpNorm theorems to include constant C in bound condition. --- Expect this may be useful for defining tempered distributions from functions in `L^p`. The definitions more or less follow `ContinuousLinearMap.compLp...`. Names are loosely analogous to `ContinuousLinearMap.bilinearComp` and `SchwartzMap.bilinLeftCLM`. Note: I preferred the spelling `hpqr : p⁻¹ + q⁻¹ = r⁻¹` with `f` in `L^p` and `g` in `L^q` to `hpqr : 1 / p = 1 / q + 1 / r`. It's easier to obtain from `ENNReal.IsConjExponent` too. A few questions: - [ ] I defined `bilinear{Left,Right}LpL` in addition to `bilinearCompLpL` because `LinearMap.mkContinuous₂` is marked as `noncomputable` and `LinearMap.mkContinuous` is not. Is this worth the extra definitions? (Note: This is not visible in the source due to `noncomputable section`.) - [ ] Should I use `C : ℝ` instead of `C : NNReal` for `eLpNorm_le_eLpNorm_mul_eLpNorm'_of_norm'`? - [ ] Is it going to be painful to have `[Fact (1 ≤ p)] [Fact (1 ≤ q)] [Fact (1 ≤ r)]`? I don't think there's a way to avoid it though. Maybe providing specialized versions for `p.IsConjExponent q` with `L^1`? Naming: - [ ] Is it satisfactory to add a `'` to the `eLpNorm_le_eLpNorm_mul_eLpNorm ` definitions in `CompareExp.lean` where `≤ ‖f x‖ * ‖g x‖` has been replaced with `≤ C * ‖f x‖ * ‖g x‖`? These could replace the existing theorems, although I don't want to break backwards compatibility. There are 5 instances: `eLpNorm_le_eLpNorm_top_mul_eLpNorm'`, `eLpNorm_le_eLpNorm_mul_eLpNorm_top'`, `eLpNorm'_le_eLpNorm'_mul_eLpNorm''`, `eLpNorm_le_eLpNorm_mul_eLpNorm_of_nnnorm'`, `eLpNorm_le_eLpNorm_mul_eLpNorm'_of_norm'` (I'm not sure why the existing theorem `eLpNorm_le_eLpNorm_mul_eLpNorm'_of_norm` has an internal `'`) - [ ] Is `bilinearLeftLpL` a suitable name? Other options: `bilinearCompLpLeftL`, `bilinearCompLeftLpL`, `bilinLeftLpL` (analogous to `SchwartzMap.bilinLeftCLM`) [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-measure-probability new-contributor 203/40 Mathlib/MeasureTheory/Function/LpSeminorm/CompareExp.lean,Mathlib/MeasureTheory/Function/LpSpace.lean 2 1 ['github-actions'] nobody
479-36849
1 year ago
479-36849
479 days ago
27-43617
27 days
20248 peabrainiac
author:peabrainiac
 feat(Topology/Compactness): first-countable locally path-connected spaces are delta-generated Shows that all first-countable locally path-connected spaces are delta-generated (so in particular all normed spaces and convex subsets thereof are), and that delta-generated spaces are equivalently generated by the unit interval or standard simplices. --- - [ ] depends on: #21616 In principle, this should be close to all that's required to show that all simplicial complexes and CW-complexes are delta-generated; I just haven't done it yet because I'm not sure which file to best do it in. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) blocked-by-other-PR large-import new-contributor merge-conflict awaiting-author t-topology 1189/813 Mathlib.lean,Mathlib/Geometry/Manifold/ChartedSpace.lean,Mathlib/Topology/Algebra/Module/LocallyConvex.lean,Mathlib/Topology/Compactness/DeltaGeneratedSpace.lean,Mathlib/Topology/Connected/LocPathConnected.lean,Mathlib/Topology/Connected/PathConnected.lean,Mathlib/Topology/ContinuousOn.lean,Mathlib/Topology/Homotopy/HSpaces.lean,Mathlib/Topology/Path.lean 9 22 ['YaelDillies', 'github-actions', 'kbuzzard', 'mathlib4-dependent-issues-bot', 'peabrainiac'] nobody
466-80559
1 year ago
473-45076
473 days ago
39-21495
39 days
19943 AlexLoitzl
author:AlexLoitzl
 feat(Computability): Add Chomsky Normal Form Grammar and translation - Define Chomsky normal form grammars - Add language-preserving translation between context-free grammars and Chomsky normal form grammars Co-authored-by: Martin Dvorak martin.dvorak@matfyz.cz --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-computability awaiting-author new-contributor 3151/0 Mathlib.lean,Mathlib/Computability/ChomskyNormalForm/Basic.lean,Mathlib/Computability/ChomskyNormalForm/EmptyElimination.lean,Mathlib/Computability/ChomskyNormalForm/LengthRestriction.lean,Mathlib/Computability/ChomskyNormalForm/TerminalRestriction.lean,Mathlib/Computability/ChomskyNormalForm/Translation.lean,Mathlib/Computability/ChomskyNormalForm/UnitElimination.lean,Mathlib/Computability/ContextFreeGrammar.lean 8 59 ['AlexLoitzl', 'YaelDillies', 'github-actions', 'kim-em', 'madvorak'] nobody
462-28258
1 year ago
469-39880
469 days ago
37-29014
37 days
21501 sksgurdldi
author:sksgurdldi
 feat(List): add sum_zipWith_eq_finset_sum ### **Description:** This PR adds the lemma `List.sum_zipWith_eq_finset_sum` to `Mathlib.Algebra.BigOperators.Group.Finset.Basic`. #### **Statement:** The sum of the `zipWith` operation on two lists equals the sum of applying the operation to corresponding elements of the two lists, indexed over the minimum of their lengths. #### **Formal Statement:** ```lean lemma sum_zipWith_eq_finset_sum [Inhabited α] [Inhabited β] [AddCommMonoid γ] {op : α → β → γ} (l : List α) (m : List β) : (List.zipWith op l m).sum = ∑ x ∈ (Finset.range (Nat.min l.length m.length)), op (l[x]!) (m[x]!) ``` #### **Remarks:** - This lemma provides a useful equivalence between `List.zipWith` and summation over a `Finset.range` indexed by `Nat.min l.length m.length`. - It can be helpful in algebraic manipulations involving list-based summations. #### **Dependencies:** No additional dependencies. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) awaiting-author t-algebra new-contributor
label:t-algebra$
 43/0 Mathlib/Algebra/BigOperators/Group/Finset/Basic.lean 1 1 ['github-actions', 'j-loreaux'] nobody
456-83429
1 year ago
456-83429
456 days ago
13-33168
13 days
21959 BGuillemet
author:BGuillemet
 feat(Topology/ContinuousMap): Stone-Weierstrass theorem for MvPolynomial Add the subalgebra of multivariate polynomials and prove it separates points, on the same model as `ContinuousMap/Polynomial.lean`. Prove the Stone-Weierstrass theorem and some variations for multivariate polynomials. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-topology new-contributor 285/1 Mathlib.lean,Mathlib/Topology/ContinuousMap/MvPolynomial.lean,Mathlib/Topology/ContinuousMap/StoneWeierstrass.lean 3 1 ['github-actions'] nobody
443-22870
1 year ago
443-22870
443 days ago
16-76141
16 days
15578 znssong
author:znssong
 feat(Function): Fixed points of function `f` with `f(x) >= x` We added some lemmas of fixed points of function `f` with `f(x) >= x`, where `f : α → α` is a function on a finite type `α`. This will be needed in proof of Bondy-Chvátal theorem. --- See also branch `meow-sister/BondyChvatal`. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict awaiting-author t-analysis new-contributor 82/0 Mathlib.lean,Mathlib/Dynamics/FixedPoints/Basic.lean,Mathlib/Dynamics/FixedPoints/Increasing.lean 3 32 ['Ruben-VandeVelde', 'YaelDillies', 'github-actions', 'urkud', 'vihdzp', 'znssong'] nobody
435-18696
1 year ago
618-21925
618 days ago
29-48368
29 days
21018 markimunro
author:markimunro
 feat(Data/Matrix): add file with key definitions and theorems about elementary row operations Prove that each elementary row operation is equivalent to a multiplication by an elementary matrix, has another row operation which inverts it, and that each elementary matrix has a left inverse. This is a very large PR and I understand it will take time. This is my first one and will likely have issues but I will be ready to answer questions/fix them as soon as possible. Co-authored-by: Christopher Lynch --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-data enhancement new-contributor merge-conflict awaiting-author 1230/0 Mathlib.lean,Mathlib/Data/Matrix/ElementaryRowOperations.lean,Mathlib/Data/Matrix/GaussianElimination.lean,Mathlib/Data/Matrix/GaussianEliminationOld,Mathlib/Data/Matrix/oldnames,et --hard 18533caba32,lean-toolchain 7 17 ['chrisflav', 'eric-wieser', 'github-actions', 'j-loreaux', 'markimunro'] nobody
416-54095
1 year ago
441-83051
441 days ago
23-22681
23 days
15212 victorliu5296
author:victorliu5296
 feat: Add fundamental theorem of calculus-2 for Banach spaces add the Mean Value Theorem for Banach spaces to the library and include reference for the theorem statement This theorem states that if `f : X → Y` is differentiable along the line segment from `a` to `b`, then the change in `f` equals the integral of its derivative along this path. This extends the mean value theorem to Banach spaces. This can be used for the eventual proof of the Newton-Kantorovich theorem with 1 constant contained inside the added reference. Here is the discussion on Zulipchat: https://leanprover.zulipchat.com/#narrow/stream/287929-mathlib4/topic/Contributing.20FTC-2.20for.20Banach.20spaces t-measure-probability new-contributor merge-conflict awaiting-author t-analysis 60/1 Mathlib/MeasureTheory/Integral/FundThmCalculus.lean 1 3 ['github-actions', 'hrmacbeth', 'victorliu5296'] nobody
411-49084
1 year ago
605-26455
605 days ago
51-85104
51 days
22308 plp127
author:plp127
 feat (Analysis/Convex): Generalize `Convex` lemmas to `StarConvex` This PR generalizes many lemmas assuming `Convex 𝕜 s` to assume `StarConvex 𝕜 0 s`. --- - [x] depends on: #22421 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict WIP t-analysis new-contributor 30/18 Mathlib/Analysis/Convex/Gauge.lean,Mathlib/Analysis/Convex/GaugeRescale.lean,Mathlib/Analysis/Convex/Star.lean,Mathlib/Analysis/LocallyConvex/AbsConvexOpen.lean 4 5 ['Paul-Lez', 'github-actions', 'leanprover-community-bot-assistant', 'mathlib4-dependent-issues-bot'] nobody
408-35004
1 year ago
unknown
0-0
0 seconds
21488 imbrem
author:imbrem
 feat(CategoryTheory/Monoidal): premonoidal categories Add support for premonoidal categories --- Still want to add support for: - Premonoidal braided/symmetric categories - The monoidal coherence theorem, which I've already ported in my `discretion` library - The `coherence` tactic, which should work fine for premonoidal categories too but wanted to get this in front of reviewers ASAP to make sure my general approach was alright [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-category-theory new-contributor 900/361 Mathlib/Algebra/Category/ModuleCat/Presheaf/Monoidal.lean,Mathlib/CategoryTheory/Bicategory/End.lean,Mathlib/CategoryTheory/GradedObject/Monoidal.lean,Mathlib/CategoryTheory/Localization/Monoidal.lean,Mathlib/CategoryTheory/Monoidal/Braided/Basic.lean,Mathlib/CategoryTheory/Monoidal/Category.lean,Mathlib/CategoryTheory/Monoidal/Center.lean,Mathlib/CategoryTheory/Monoidal/CoherenceLemmas.lean,Mathlib/CategoryTheory/Monoidal/Discrete.lean,Mathlib/CategoryTheory/Monoidal/End.lean,Mathlib/CategoryTheory/Monoidal/Free/Basic.lean,Mathlib/CategoryTheory/Monoidal/Functor.lean,Mathlib/CategoryTheory/Monoidal/FunctorCategory.lean,Mathlib/CategoryTheory/Monoidal/Mon_.lean,Mathlib/CategoryTheory/Monoidal/Opposite.lean,Mathlib/CategoryTheory/Monoidal/Transport.lean,Mathlib/Tactic/CategoryTheory/Monoidal/Datatypes.lean,Mathlib/Tactic/CategoryTheory/Monoidal/Normalize.lean,Mathlib/Tactic/CategoryTheory/Monoidal/PureCoherence.lean,Mathlib/Tactic/CategoryTheory/MonoidalComp.lean,MathlibTest/StringDiagram.lean 21 9 ['YaelDillies', 'github-actions', 'grunweg', 'imbrem', 'kim-em', 'leanprover-community-bot-assistant'] nobody
408-31272
1 year ago
408-31273
408 days ago
58-6026
58 days
20873 vbeffara
author:vbeffara
 feat(Topology/Covering): path lifting and homotopy lifting This proves the existence and uniqueness of path and homotopy lifts through covering maps. --- I tried to separate as much of the proof as possible into separate PRs (which are already in Mathlib now), but the proof here relies on a monolithic construction of an explicit lift along a well-chosen subdivision, in `partial_lift`, with associated definitions. Only one standalone lean file added. An older WIP PR #10084 by Junyan Xu @alreadydone proves similar results using a very similar construction for path lifting, with a different argument to obtain continuity for homotopy lifting. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict awaiting-author t-topology new-contributor 281/1 Mathlib.lean,Mathlib/Topology/Covering/Basic.lean,Mathlib/Topology/Covering/Lift.lean 3 9 ['alreadydone', 'github-actions', 'grunweg', 'vbeffara'] nobody
407-34000
1 year ago
482-26760
482 days ago
5-5648
5 days
20313 thefundamentaltheor3m
author:thefundamentaltheor3m
 feat(Data/Complex/Exponential): prove some useful results about the complex exponential. This PR proves two basic results about the complex exponential: * `abs_exp_mul_I (x : ℂ) : abs (Complex.exp (I * x)) = Real.exp (-x.im)` * `one_sub_rexp_re_le_abs_one_sub_cexp (x : ℂ) : 1 - Real.exp x.re ≤ Complex.abs (1 - Complex.exp x)` Both results were proved as part of the sphere packing project. There's a chance they're too specific for mathlib, but I thought they were worth PRing anyway. Would it also be a good idea to tag `abs_exp_mul_I` with `simp`? Feedback/suggestions welcome. Note: `one_sub_rexp_re_le_abs_one_sub_cexp` was proved by Bhavik Mehta @b-mehta --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-analysis new-contributor 167/141 Mathlib.lean,Mathlib/Analysis/Complex/Basic.lean,Mathlib/Analysis/SpecialFunctions/Log/ERealExp.lean,Mathlib/Analysis/SpecialFunctions/Trigonometric/Chebyshev.lean,Mathlib/Data/Complex/Exponential/Defs.lean,Mathlib/Data/Complex/Exponential/Lemmas.lean,Mathlib/Data/Complex/ExponentialBounds.lean,Mathlib/Tactic/FunProp.lean,MathlibTest/Recall.lean,MathlibTest/positivity.lean 10 12 ['b-mehta', 'github-actions', 'kim-em', 'thefundamentaltheor3m', 'trivial1711'] nobody
400-5198
1 year ago
483-16445
483 days ago
8-42257
8 days
20730 kuotsanhsu
author:kuotsanhsu
 feat(LinearAlgebra/Matrix/SchurTriangulation): prove Schur decomposition/triangulation `Matrix.schur_triangulation` shows that a matrix over an algebraically closed field is unitarily similar to an upper triangular matrix --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict awaiting-author t-algebra new-contributor
label:t-algebra$
 317/2 Mathlib.lean,Mathlib/LinearAlgebra/Matrix/Block.lean,Mathlib/LinearAlgebra/Matrix/SchurTriangulation.lean,Mathlib/Logic/Equiv/Basic.lean 4 14 ['eric-wieser', 'github-actions', 'kim-em', 'kuotsanhsu'] nobody
400-1330
1 year ago
479-78703
479 days ago
13-56244
13 days
22809 b-reinke
author:b-reinke
 feat: Category algebras and path algebras This PR defines the category algebra of a linear category and path algebras of quivers. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) WIP t-algebra t-category-theory new-contributor
label:t-algebra$
 218/0 Mathlib/Algebra/Ring/Assoc.lean,Mathlib/CategoryTheory/Linear/CategoryAlgebra.lean,Mathlib/Combinatorics/Quiver/PathAlgebra.lean,Mathlib/Data/DFinsupp/BigOperators.lean 4 2 ['b-reinke', 'github-actions'] nobody
384-52169
1 year ago
unknown
0-0
0 seconds
15654 TpmKranz
author:TpmKranz
 feat(Computability): language-preserving maps between NFA and RE Map REs to NFAs via Thompson's construction and NFAs to REs using GNFAs Last chunk of #12648 --- - [ ] depends on: #15651 - [ ] depends on: #15649 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) blocked-by-other-PR new-contributor t-computability merge-conflict awaiting-zulip 985/2 Mathlib.lean,Mathlib/Computability/GNFA.lean,Mathlib/Computability/Language.lean,Mathlib/Computability/NFA.lean,Mathlib/Computability/RegularExpressions.lean,Mathlib/Data/FinEnum/Option.lean,docs/references.bib 7 3 ['github-actions', 'leanprover-community-mathlib4-bot', 'meithecatte'] nobody
381-84848
1 year ago
651-21633
651 days ago
0-179
2 minutes
24008 meithecatte
author:meithecatte
 chore(EpsilonNFA): replace manual lemmas with @[simps] --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-computability awaiting-author new-contributor 2/24 Mathlib/Computability/EpsilonNFA.lean 1 2 ['YaelDillies', 'github-actions', 'urkud'] nobody
376-44027
1 year ago
376-44027
376 days ago
27-52316
27 days
23349 BGuillemet
author:BGuillemet
 feat: add LocallyLipschitzOn.lipschitzOnWith_of_isCompact and two small lemmas about Lipschitz functions Main feat (in Mathlib/Topology/EMetricSpace/Basic.lean): if a function `f` from an extended pseudometric space to a pseudometric space is locally Lipschitz on a compact subset `s`, then `f` is Lipschitz on `s`. The theorem is true only when the codomain of `f` is a pseudometric space, so it needs imports from Mathlib/Topology/MetricSpace. Other small feat (in Mathlib/Analysis/Calculus/ContDiff/RCLike.lean): a function that is continuously differentiable on an open subset is locally Lipschitz on this subset. --- - [ ] depends on: #22890 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-topology large-import new-contributor 59/4 Mathlib/Analysis/Calculus/ContDiff/RCLike.lean,Mathlib/Topology/EMetricSpace/Lipschitz.lean 2 4 ['github-actions', 'leanprover-community-bot-assistant', 'mathlib4-dependent-issues-bot'] PatrickMassot
assignee:PatrickMassot
360-16368
11 months ago
360-16370
360 days ago
35-30364
35 days
12799 jstoobysmith
author:jstoobysmith
 feat(LinearAlgebra/UnitaryGroup): Add properties of Special Unitary Group Add properties of the special unitary group, mirroring the properties of found in Algebra/Star/Unitary.lean. In particular, I add an instance of `specialUnitaryGroup` as a `Group`, `Star`, `InvolutiveStar`, and `StarMul`. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) please-adopt t-algebra new-contributor merge-conflict awaiting-author
label:t-algebra$
 78/0 Mathlib/LinearAlgebra/UnitaryGroup.lean 1 8 ['chrisflav', 'jcommelin', 'leanprover-community-bot-assistant'] nobody
349-74721
11 months ago
733-15974
733 days ago
9-22045
9 days
20334 miguelmarco
author:miguelmarco
 feat: allow polyrith to use a local Singular/Sage install Try to call a local install of Singular (either standalone or inside Sage) to find the witness for polyrith before trying to call the online sage cell server. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict awaiting-author new-contributor t-meta 171/48 Mathlib/Tactic/Polyrith.lean,scripts/polyrith_sage.py 2 16 ['eric-wieser', 'github-actions', 'hanwenzhu', 'kim-em', 'miguelmarco', 'mkoeppe'] nobody
342-67274
11 months ago
481-18855
481 days ago
27-61498
27 days
25218 kckennylau
author:kckennylau
 feat(AlgebraicGeometry): Tate normal form of elliptic curves --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-algebraic-geometry awaiting-zulip new-contributor 291/26 Mathlib.lean,Mathlib/AlgebraicGeometry/EllipticCurve/IsomOfJ.lean,Mathlib/AlgebraicGeometry/EllipticCurve/Modular/TateNormalForm.lean,Mathlib/AlgebraicGeometry/EllipticCurve/NormalForms.lean,Mathlib/AlgebraicGeometry/EllipticCurve/VariableChange.lean 5 31 ['MichaelStollBayreuth', 'Multramate', 'acmepjz', 'github-actions', 'grunweg', 'kckennylau', 'leanprover-community-bot-assistant'] nobody
321-64035
10 months ago
354-39152
354 days ago
6-47693
6 days
10190 jstoobysmith
author:jstoobysmith
 feat(AlgebraicTopology): add Augmented Simplex Category - Added the definition of the category FinLinOrd of finite linear ordered sets. - Added the definition of the augmented simplex category `AugmentedSimplexCategory`, and showed it is the Skeleton of FinLinOrd. - Showed that the category of augmented simplicial objects defined as a comma category is equivalent to the category of functors from `AugmentedSimplexCategory^\op` --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebraic-topology WIP t-category-theory new-contributor merge-conflict 720/0 Mathlib.lean,Mathlib/AlgebraicTopology/AugmentedSimplexCategory.lean,Mathlib/AlgebraicTopology/SimplicialObject.lean,Mathlib/Order/Category/FinLinOrd.lean 4 5 ['TwoFX', 'YaelDillies', 'joelriou', 'jstoobysmith'] nobody
295-36175
9 months ago
832-29101
832 days ago
7-63253
7 days
25238 Hagb
author:Hagb
 feat(Tactic/ComputeDegree): add support for scalar multiplication with different types It would be able to deal with `a • (X : R[X])` where `a : S` is in a different type `S` with `[SMulZeroClass S R]`. --- - [x] depends on: #25237 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-meta new-contributor 17/5 Mathlib/Tactic/ComputeDegree.lean,MathlibTest/ComputeDegree.lean 2 3 ['github-actions', 'leanprover-community-bot-assistant', 'mathlib4-dependent-issues-bot'] nobody
291-42366
9 months ago
321-64035
321 days ago
38-26044
38 days
18646 jxjwan
author:jxjwan
 feat(RingTheory): isotypic components --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-ring-theory new-contributor 308/0 Mathlib/Order/CompactlyGenerated/Basic.lean,Mathlib/RingTheory/Isotypic.lean,Mathlib/RingTheory/SimpleModule.lean 3 1 ['github-actions'] nobody
290-44387
9 months ago
543-37980
543 days ago
20-16585
20 days
20671 thefundamentaltheor3m
author:thefundamentaltheor3m
 feat(Analysis/Asymptotics/SpecificAsymptotics): Proving that 𝛔ₖ(n) = O(nᵏ⁺¹) This PR proves a result about the $\sigma_k(n)$ arithmetic function, namely, that it is $O\left(n^{k+1}\right)$. Main theorem: `theorem sigma_asymptotic (k : ℕ) : (fun n ↦ (σ k n : ℝ)) =O[atTop] (fun n ↦ (n ^ (k + 1) : ℝ))` This result was proved as part of the sphere packing project. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-number-theory new-contributor large-import merge-conflict awaiting-author 29/0 Mathlib/Analysis/Asymptotics/SpecificAsymptotics.lean 1 3 ['b-mehta', 'github-actions', 'mathlib4-merge-conflict-bot'] b-mehta
assignee:b-mehta
285-47928
9 months ago
486-22743
486 days ago
9-59130
9 days
20722 ctchou
author:ctchou
 feat(Counterexamples): the Vitali set is non-measurable --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) please-adopt t-measure-probability new-contributor merge-conflict awaiting-author 258/3 Counterexamples.lean,Counterexamples/VitaliSetNotMeasurable.lean,Mathlib/MeasureTheory/Measure/NullMeasurable.lean,docs/1000.yaml 4 76 ['ctchou', 'github-actions', 'grunweg', 'mathlib4-merge-conflict-bot', 'vihdzp'] vihdzp
assignee:vihdzp
279-37612
9 months ago
493-29582
493 days ago
0-47663
13 hours
28502 gilesgshaw
author:gilesgshaw
 feat(Logic/Basic): avoid unnecessary uses of choice Certain proofs are modified to remove a dependence on the axoim of choice --- - [ ] depends on: #28623 blocked-by-other-PR new-contributor merge-conflict awaiting-author t-logic 83/74 Mathlib/Logic/Basic.lean 1 7 ['Ruben-VandeVelde', 'eric-wieser', 'gilesgshaw', 'github-actions', 'kim-em', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
276-59424
9 months ago
279-44953
279 days ago
0-35689
9 hours
19582 yu-yama
author:yu-yama
 feat(GroupExtension/Abelian): define `OfMulDistribMulAction.equivH2` Mainly defines: - `structure GroupExtension.OfMulDistribMulAction N G [MulDistribMulAction G N]`: group extensions of `G` by `N` where the multiplicative action of `G` on `N` is the conjugation - `structure GroupExtension.OfMulDistribMulActionWithSection N G [MulDistribMulAction G N]`: group extensions with specific choices of sections - `def GroupExtension.OfMulDistribMulAction.equivH2`: a bijection between the equivalence classes of group extensions and $H^2 (G, N)$ --- - [x] depends on: #20802 (split PR: contains changes to the `Defs` file) - [x] depends on: #20998 (split PR: mainly adds the `Basic` file) - [ ] depends on: #26670 (split PR: adds the first part of the `Abelian` file) Here is a relevant TODO in Mathlib: https://github.com/leanprover-community/mathlib4/blob/4e9fa40d7c480937e09cd6e47a591bd6f3b8be42/Mathlib/RepresentationTheory/GroupCohomology/LowDegree.lean#L46-L48 I would appreciate your comments. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-algebra blocked-by-other-PR new-contributor
label:t-algebra$
 750/14 Mathlib.lean,Mathlib/GroupTheory/GroupExtension/Abelian.lean,Mathlib/GroupTheory/GroupExtension/Defs.lean,docs/references.bib 4 5 ['YaelDillies', 'erdOne', 'github-actions', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
274-9532
9 months ago
496-66491
496 days ago
43-22586
43 days
27403 MoritzBeroRoos
author:MoritzBeroRoos
 fix: replace probably erroneous usage of ⬝ (with old \cdot) by · (with \centerdot) Discussion at [zulip](https://leanprover.zulipchat.com/#narrow/channel/270676-lean4/topic/.5Ccdot.20!.3D.20.5Ccenterdot). Currently the abbreviations \cdot and \centerdot resolve to different, with the naked eye nearly undistinguishable symbols (despite the c in cdot surely standing for center..). This pr replaces instances of ⬝ where · was probably meant. All of the replacement is in comments, except for the file bench_summary.lean which is used for priting the github benchmark results. Since this file is about scientific notation of numbers, sure · was meant to be used, not a rectangle. [Related](https://github.com/leanprover-community/mathlib4/pull/27399) --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict new-contributor 195/195 Mathlib/Algebra/ContinuedFractions/Computation/Approximations.lean,Mathlib/Algebra/DirectSum/Idempotents.lean,Mathlib/Algebra/Lie/Derivation/Basic.lean,Mathlib/Algebra/Module/Equiv/Basic.lean,Mathlib/AlgebraicGeometry/EllipticCurve/DivisionPolynomial/Basic.lean,Mathlib/Analysis/Analytic/Constructions.lean,Mathlib/Analysis/CStarAlgebra/CStarMatrix.lean,Mathlib/Analysis/Calculus/ContDiff/Basic.lean,Mathlib/Analysis/Calculus/ContDiff/Bounds.lean,Mathlib/Analysis/Calculus/FDeriv/Symmetric.lean,Mathlib/Analysis/Fourier/FourierTransformDeriv.lean,Mathlib/Analysis/InnerProductSpace/Dual.lean,Mathlib/Analysis/InnerProductSpace/PiL2.lean,Mathlib/Analysis/Normed/Unbundled/InvariantExtension.lean,Mathlib/Analysis/SpecialFunctions/Complex/CircleAddChar.lean,Mathlib/Combinatorics/Configuration.lean,Mathlib/Combinatorics/SimpleGraph/AdjMatrix.lean,Mathlib/Combinatorics/SimpleGraph/LapMatrix.lean,Mathlib/Data/Matrix/Block.lean,Mathlib/Data/Matrix/ConjTranspose.lean,Mathlib/Data/Matrix/Hadamard.lean,Mathlib/Data/Matrix/Mul.lean,Mathlib/Data/Matrix/Notation.lean,Mathlib/Data/Matrix/Reflection.lean,Mathlib/Data/Matrix/RowCol.lean,Mathlib/Data/Matrix/Vec.lean,Mathlib/FieldTheory/PurelyInseparable/PerfectClosure.lean,Mathlib/Geometry/Manifold/GroupLieAlgebra.lean,Mathlib/GroupTheory/Coxeter/Matrix.lean,Mathlib/LinearAlgebra/CrossProduct.lean,Mathlib/LinearAlgebra/Matrix/BilinearForm.lean,Mathlib/LinearAlgebra/Matrix/DotProduct.lean,Mathlib/LinearAlgebra/Matrix/Nondegenerate.lean,Mathlib/LinearAlgebra/Matrix/Orthogonal.lean,Mathlib/LinearAlgebra/Matrix/PosDef.lean,Mathlib/LinearAlgebra/Matrix/SchurComplement.lean,Mathlib/LinearAlgebra/Matrix/SesquilinearForm.lean,Mathlib/LinearAlgebra/Matrix/Trace.lean,Mathlib/LinearAlgebra/Multilinear/Basic.lean,Mathlib/LinearAlgebra/PerfectPairing/Matrix.lean,Mathlib/LinearAlgebra/Projectivization/Constructions.lean,Mathlib/NumberTheory/NumberField/ProductFormula.lean,Mathlib/NumberTheory/SiegelsLemma.lean,Mathlib/RingTheory/DividedPowers/SubDPIdeal.lean,Mathlib/SetTheory/Ordinal/Veblen.lean,Mathlib/Topology/Algebra/Module/Equiv.lean,Mathlib/Topology/Homeomorph/Lemmas.lean,Mathlib/Topology/Instances/Matrix.lean,scripts/bench_summary.lean 49 5 ['eric-wieser', 'github-actions', 'grunweg', 'leanprover-community-bot-assistant'] nobody
272-60513
8 months ago
295-36435
295 days ago
7-54661
7 days
27399 MoritzBeroRoos
author:MoritzBeroRoos
 chore: replace every usage of ⬝ᵥ (with old \cdot) by ·ᵥ (with \centerdot) Discussion at [zulip](https://leanprover.zulipchat.com/#narrow/channel/270676-lean4/topic/.5Ccdot.20!.3D.20.5Ccenterdot). Currently the abbreviations `\cdot` and `\centerdot` resolve to different, with the naked eye nearly undistinguishable symbols (despite the c in cdot surely standing for `center`..): - `\cdot` gives ⬝ [U+2B1D](https://www.compart.com/en/unicode/U+2B1D) "Black Very Small Square" - `\centerdot` gives · [U+00B7](https://www.compart.com/en/unicode/U+00B7) "Middle Dot" Mathlib mostly uses the `\centerdot` variant, except for the dotProduct notation and some probably unsuspecting people wanting \centerdot but getting \cdot in their comments and 6 uses of a notation using the raw `\cdot` without any subscript at `Mathlib\Topology\Homotopy\Product.lean`. This PR replaces the dot product `⬝ᵥ` with its `\centerdot` counterpart `·ᵥ`. The related PR [here](https://github.com/leanprover/vscode-lean4/pull/639) can then overwrite the `\cdot` abbreviation, to produce the same symbol as the `centerdot` abbreviation does. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict new-contributor 133/133 Mathlib/Analysis/CStarAlgebra/CStarMatrix.lean,Mathlib/Analysis/InnerProductSpace/PiL2.lean,Mathlib/Combinatorics/Configuration.lean,Mathlib/Combinatorics/SimpleGraph/AdjMatrix.lean,Mathlib/Combinatorics/SimpleGraph/LapMatrix.lean,Mathlib/Data/Matrix/Block.lean,Mathlib/Data/Matrix/ConjTranspose.lean,Mathlib/Data/Matrix/Hadamard.lean,Mathlib/Data/Matrix/Mul.lean,Mathlib/Data/Matrix/Notation.lean,Mathlib/Data/Matrix/Reflection.lean,Mathlib/Data/Matrix/RowCol.lean,Mathlib/Data/Matrix/Vec.lean,Mathlib/LinearAlgebra/CrossProduct.lean,Mathlib/LinearAlgebra/Matrix/BilinearForm.lean,Mathlib/LinearAlgebra/Matrix/DotProduct.lean,Mathlib/LinearAlgebra/Matrix/Nondegenerate.lean,Mathlib/LinearAlgebra/Matrix/Orthogonal.lean,Mathlib/LinearAlgebra/Matrix/PosDef.lean,Mathlib/LinearAlgebra/Matrix/SchurComplement.lean,Mathlib/LinearAlgebra/Matrix/SesquilinearForm.lean,Mathlib/LinearAlgebra/Matrix/Trace.lean,Mathlib/LinearAlgebra/PerfectPairing/Matrix.lean,Mathlib/LinearAlgebra/Projectivization/Constructions.lean,Mathlib/Topology/Instances/Matrix.lean 25 6 ['MoritzBeroRoos', 'eric-wieser', 'github-actions', 'leanprover-community-bot-assistant'] nobody
272-22345
8 months ago
295-36436
295 days ago
7-62439
7 days
27479 iu-isgood
author:iu-isgood
 feat: Abel's Binomial Theorem We have formalized Abel's Binomial Theorem as part of an REU project. There are a few remaining sorrys, but we will finish them soon. I will edit this PR message later according to community rules. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) awaiting-author t-data new-contributor 326/0 Mathlib/Data/Nat/Choose/AbelBinomial.lean 1 28 ['ElifUskuplu', 'FrankieNC', 'github-actions', 'iu-isgood'] nobody
272-22106
8 months ago
301-19803
301 days ago
0-237
3 minutes
26462 PSchwahn
author:PSchwahn
 feat(LinearAlgebra/Projection): add results about inverse of `Submodule.prodEquivOfIsCompl` Add two theorems `Submodule.prodEquivOfIsCompl_symm_apply` and `Submodule.prodEquivOfIsCompl_symm_add`, which are API for `Submodule.prodEquivOfIsCompl`. We believe these theorems are useful; for example, we have used their statements in a [classification formalization project](https://github.com/LieLean/LowDimSolvClassification). Co-authored by: - [Viviana del Barco](https://github.com/vdelbarc) - [Gustavo Infanti](https://github.com/GuQOliveira) - [Exequiel Rivas](https://github.com/erivas) --- I am not sure whether the `prodEquivOfIsCompl_symm_apply` theorem should be tagged with `@[simp]`; this might lead to confluence issues. Opinions are welcome! [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) awaiting-author t-algebra new-contributor
label:t-algebra$
 10/0 Mathlib/LinearAlgebra/Projection.lean 1 7 ['PSchwahn', 'github-actions', 'joelriou', 'kckennylau'] joelriou
assignee:joelriou
255-79874
8 months ago
256-24577
256 days ago
73-43082
73 days
28623 gilesgshaw
author:gilesgshaw
 feat(Logic/Basic): minor additions and simplification of proofs Add new theorems and simplify proofs. Specifically, we add the family of related theorems `apply_dite_iff_exists`, `apply_dite_iff_forall`, `apply_ite_iff_and` and `apply_ite_iff_or`. For each other 'family' of theorems in the file that is analogous to the above, we do the following - Simplify proofs where possible, e.g. by appealing to the new theorems - Complete the family, if any of the corresponding four are missing - Rename to ensure consistency with the above pattern --- merge-conflict t-logic new-contributor 83/55 Archive/Examples/IfNormalization/Result.lean,Archive/Examples/IfNormalization/WithoutAesop.lean,Mathlib/Algebra/ContinuedFractions/Computation/Translations.lean,Mathlib/Algebra/MvPolynomial/Variables.lean,Mathlib/Algebra/Notation/Indicator.lean,Mathlib/LinearAlgebra/Matrix/Rank.lean,Mathlib/Logic/Basic.lean,Mathlib/MeasureTheory/Measure/WithDensity.lean,Mathlib/SetTheory/Ordinal/Notation.lean 9 12 ['eric-wieser', 'gilesgshaw', 'github-actions', 'mathlib4-merge-conflict-bot', 'plp127'] awainverse
assignee:awainverse
255-28376
8 months ago
255-28377
255 days ago
10-61840
10 days
25778 thefundamentaltheor3m
author:thefundamentaltheor3m
 feat: Monotonicity of `setIntegral` for nonnegative functions This PR makes it easier to prove monotonicity of the Bochner integral on sets for nonnegative functions by removing the stronger assumption required by the general monotonicity lemma that both of the functions being compared must be integrable. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) awaiting-author t-measure-probability new-contributor 8/0 Mathlib/MeasureTheory/Integral/Bochner/Set.lean 1 6 ['RemyDegenne', 'github-actions', 'sgouezel', 'thefundamentaltheor3m'] nobody
253-24098
8 months ago
344-31936
344 days ago
0-11893
3 hours
29588 Periecle
author:Periecle
 feat(Analysis/Complex/Residue): Implement residue theory for complex functions at isolated singularities # Add basic residue theory for complex functions This PR introduces the residue theory implementation in mathlib. ## Main additions - **`HasIsolatedSingularityAt f c`**: Predicate for functions with isolated singularities at point `c` - **`residue f c hf`**: The residue of `f` at isolated singularity `c`, defined via circle integrals - **Radius independence**: `residue_eq_two_pi_I_inv_smul_circleIntegral` - residue equals normalized circle integral for any valid radius - **Holomorphic residues**: `residue_of_holomorphic` - functions holomorphic in a neighborhood have zero residue - **Simple pole formula**: `residue_simple_pole` - for `f(z) = (z-c)⁻¹ * g(z)`, residue equals `g(c)` ## Implementation notes - Builds on existing circle integral infrastructure in `CauchyIntegral.lean` - Uses `Classical.choose` to extract witness radius from isolated singularity condition - Comprehensive documentation with mathematical context and examples - Establishes foundation for residue theorem, argument principle, and other applications ## Examples included - `residue(1/z, 0) = 1` (canonical simple pole) - Radius independence demonstration - Zero residues for holomorphic functions This provides the essential building blocks for complex analysis and first step to formalize residue theory. awaiting-author t-analysis new-contributor 383/0 Mathlib/Analysis/Complex/Residue/Basic.lean 1 17 ['Periecle', 'github-actions', 'hrmacbeth', 'llllvvuu', 'loefflerd'] nobody
240-27576
7 months ago
252-33958
252 days ago
0-976
16 minutes
26178 ppls-nd-prs
author:ppls-nd-prs
 feat(CategoryTheory/Limits): Fubini for products We show that the product of products is a product indexed by the sigma type. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict awaiting-author t-category-theory new-contributor 17/0 Mathlib/CategoryTheory/Limits/Shapes/Products.lean 1 6 ['chrisflav', 'github-actions', 'leanprover-community-bot-assistant', 'ppls-nd-prs', 'robin-carlier'] nobody
235-42620
7 months ago
336-52020
336 days ago
0-47665
13 hours
28630 Antidite
author:Antidite
 feat(Archive/Imo): right isosceles configuration in the complex plane feat(Archive/Imo): right isosceles configuration in the complex plane This adds `Archive/Imo/Imo1975Q3.lean`, formalizing a triangle configuration with points A=0, B=1, C=z and auxiliary points R, P, Q built via complex rotations and sine-based scale factors. Main results: * `angle_and_distance`: ∠QRP = π/2 and dist Q R = dist R P. * Key identity `QRP_rot90`: (Q z).z − R.z = e^{iπ/2} · ((P z).z − R.z). Design/Style: * Minimal imports; module docstring; semantic lemma names; all definitions and theorems live under the namespace `IMO.TriangleConfig`. Moves: - (none) Deletions: - (none) --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) IMO awaiting-author new-contributor 196/0 Archive.lean,Archive/Imo/Imo1975Q3.lean 2 36 ['Antidite', 'LLaurance', 'github-actions', 'jsm28'] jsm28
assignee:jsm28
230-8366
7 months ago
230-8366
230 days ago
46-25852
46 days
16773 arulandu
author:arulandu
 feat(Probability/Distributions): formalize Beta distribution Formalize Beta distribution, using Gamma distribution as a reference. Added real-valued beta wrapper, in the manner of gamma. Thanks to @EtienneC30 for help with casting real <-> complex. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict awaiting-author new-contributor t-measure-probability 286/1 Mathlib.lean,Mathlib/Analysis/SpecialFunctions/Gamma/Beta.lean,Mathlib/Probability/Distributions/Beta.lean 3 50 ['EtienneC30', 'arulandu', 'github-actions', 'mathlib4-merge-conflict-bot', 'vihdzp'] arulandu
assignee:arulandu
224-17671
7 months ago
614-45220
614 days ago
1-21124
1 day
30460 janithamalith
author:janithamalith
 feat(Nat): add lemma nat_card_orbit_mul_card_stabilizer_eq_card_group Added a lemma `nat_card_orbit_mul_card_stabilizer_eq_card_group` which is the Nat.card version of MulAction.card_orbit_mul_card_stabilizer_eq_card_group --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) awaiting-author t-group-theory new-contributor 6/0 Mathlib/GroupTheory/GroupAction/CardCommute.lean 1 17 ['github-actions', 'kckennylau', 'plp127', 'tb65536'] tb65536
assignee:tb65536
214-27921
7 months ago
214-27921
214 days ago
8-8414
8 days
25225 xcloudyunx
author:xcloudyunx
 feat(Combinatorics/SimpleGraph): Eulerian walk in connected graph contains all vertices --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) awaiting-author t-combinatorics new-contributor 16/0 Mathlib/Combinatorics/SimpleGraph/Trails.lean 1 6 ['IvanRenison', 'github-actions', 'vlad902'] kmill
assignee:kmill
212-77853
7 months ago
212-77853
212 days ago
148-3286
148 days
30828 DeVilhena-Paulo
author:DeVilhena-Paulo
 feat: implementation of `Finmap.merge` The main contribution of this pull request is the implementation of a `merge` function for finite maps (`Finmap`). The construction relies on the definition of a `merge` function for association lists (`AList`). There is also a side (unrelated) contribution on `Mathlib/Data/List/Permutation.lean`: the addition of a theorem about the permutation of a list with a head element (that is, a list of the form `a :: l`). --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-data new-contributor 449/3 Mathlib/Data/Finmap.lean,Mathlib/Data/List/AList.lean,Mathlib/Data/List/Permutation.lean,Mathlib/Data/List/Sigma.lean 4 1 ['github-actions'] nobody
211-14885
6 months ago
211-14956
211 days ago
0-80
1 minute
28676 sun123zxy
author:sun123zxy
 feat(NumberTheory/ArithmeticFunction): wrap `Nat.totient` as an `ArithmeticFunction` This wraps the Euler's totient function `Nat.totient` into a new `ArithmeticFunction` `ϕ`, with some basic identities such as `ϕ * ζ = id` and `μ * id = ϕ.` --- We use the notation `ϕ` to distinguish from `Nat.totient`'s notation `φ`, however this might be controversial. Suggestions are welcome! [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-number-theory new-contributor large-import merge-conflict awaiting-author 45/5 Mathlib/NumberTheory/ArithmeticFunction.lean 1 19 ['MichaelStollBayreuth', 'SnirBroshi', 'b-mehta', 'eric-wieser', 'github-actions', 'mathlib4-merge-conflict-bot', 'riccardobrasca', 'sun123zxy'] MichaelStollBayreuth
assignee:MichaelStollBayreuth
206-47324
6 months ago
222-22000
222 days ago
47-58311
47 days
30299 franv314
author:franv314
 feat(Topology/Instances): Cantor set Prove that the Cantor set has empty interior and the cardinality of the continuum as discussed on [Zulip](https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/A.20few.20results.20about.20the.20Cantor.20set/with/543560670) Moves: - Mathlib.Topology.Instances.CantorSet -> Mathlib.Topology.Instances.CantorSet.Basic --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor merge-conflict file-removed awaiting-author t-topology 355/2 Mathlib.lean,Mathlib/Topology/Instances/CantorSet/Basic.lean,Mathlib/Topology/Instances/CantorSet/Cardinality.lean,Mathlib/Topology/Instances/CantorSet/Lemmas.lean 4 5 ['github-actions', 'grunweg', 'kckennylau', 'mathlib4-merge-conflict-bot'] nobody
206-39054
6 months ago
227-21683
227 days ago
0-2409
40 minutes
30303 franv314
author:franv314
 chore(Topology/Instances): add deprecated module Add deprecated module to moved Cantor set file. --- - [ ] depends on: #30299 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict blocked-by-other-PR new-contributor 486/124 Mathlib.lean,Mathlib/Topology/Instances/CantorSet.lean,Mathlib/Topology/Instances/CantorSet/Basic.lean,Mathlib/Topology/Instances/CantorSet/Cardinality.lean,Mathlib/Topology/Instances/CantorSet/Lemmas.lean 5 3 ['github-actions', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
206-39052
6 months ago
227-19552
227 days ago
0-340
5 minutes
29871 zach1502
author:zach1502
 feat(Matrix/Transvection): Gauss pivot determinant identity and pivot preservation This PR adds two lemmas formalizing standard Gaussian pivot identities: * `Matrix.Transvection.listTransvecCol_mul_mul_listTransvecRow_pivot`: After applying the canonical left/right transvection products that clear the last column and row, the pivot (bottom-right) entry of a matrix is unchanged. Marked `@[simp]`. * `Matrix.Transvection.det_eq_detTopLeft_mul_pivot`: If the pivot entry is nonzero, then the determinant of the matrix factors as the determinant of the top-left block times the pivot entry, after performing the canonical transvections. This is the usual Gauss–pivot determinant identity. * Added simple usage tests in `MathlibTest/matrix.lean` to check that the new lemmas are usable by `simp`/`simpa`. --- --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) awaiting-author t-algebra new-contributor
label:t-algebra$
 94/0 Mathlib/LinearAlgebra/Matrix/Transvection.lean,MathlibTest/matrix.lean 2 3 ['github-actions', 'riccardobrasca', 'zach1502'] nobody
200-38575
6 months ago
200-38575
200 days ago
41-53449
41 days
30158 nicolaviolette
author:nicolaviolette
 feat: combinatorics simplegraph basic --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) awaiting-author t-combinatorics new-contributor 9/4 Mathlib/Combinatorics/SimpleGraph/Basic.lean 1 3 ['b-mehta', 'github-actions'] b-mehta
assignee:b-mehta
199-58105
6 months ago
199-58105
199 days ago
31-69826
31 days
26901 5hv5hvnk
author:5hv5hvnk
 feat: a simproc version of `compute_degree` Wrap `compute_degree` in a simproc for use by simp. Closes #22219. --- awaiting-CI new-contributor merge-conflict awaiting-author t-meta 198/0 Mathlib.lean,Mathlib/Tactic/Simproc/PolynomialDegree.lean,MathlibTest/polynomial_degree_simproc.lean 3 19 ['5hv5hvnk', 'YaelDillies', 'adomani', 'github-actions', 'mathlib4-merge-conflict-bot'] nobody
197-18373
6 months ago
315-35367
315 days ago
2-71043
2 days
30150 imbrem
author:imbrem
 feat(CategoryTheory/Monoidal): to_additive for MonoidalCategory Add `AddMonoidalCategory`, the additive version of `MonoidalCategory`. To get this to work, I needed to _remove_ the `to_additive` attributes in `Discrete.lean`, since existing code relies on the `AddMonoid M → MonoidalCategory M` instance. For now, we simply implement the additive variants by hand instead. --- As discussed in #28718; I added an `AddMonoidalCategory` struct and tagged `MonoidalCategory` with `to_additive`, along with the lemmas in `Category.lean`. I think this is the right approach, since under this framework the "correct" additive version of `Discrete.lean` would be mapping an `AddMonoid` to an `AddMonoidalCategory`. Next steps would be to: - Make `monoidal_coherence` and `coherence` support `AddMonoidalCategory` - Add `CocartesianMonoidalCategory` extending `AddMonoidalCategory` [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-category-theory large-import new-contributor merge-conflict awaiting-zulip t-meta 444/125 Mathlib/CategoryTheory/Monoidal/Category.lean,Mathlib/CategoryTheory/Monoidal/Discrete.lean,Mathlib/Tactic/ToAdditive/GuessName.lean 3 22 ['JovanGerb', 'YaelDillies', 'github-actions', 'imbrem', 'mathlib4-merge-conflict-bot'] nobody
190-67764
6 months ago
230-46430
230 days ago
1-160
1 day
15651 TpmKranz
author:TpmKranz
 feat(Computability/NFA): operations for Thompson's construction Lays the groundwork for a proof of equivalence of RE and NFA, w.r.t. described language. Actual connection to REs comes later, after the groundwork for the opposite direction has been laid. Third chunk of #12648 --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor t-computability merge-conflict awaiting-author awaiting-zulip 307/5 Mathlib/Computability/NFA.lean 1 27 ['TpmKranz', 'YaelDillies', 'dupuisf', 'github-actions', 'leanprover-community-bot-assistant', 'meithecatte', 'rudynicolop'] nobody
185-84896
6 months ago
605-25884
605 days ago
45-84611
45 days
15649 TpmKranz
author:TpmKranz
 feat(Computability): introduce Generalised NFA as bridge to Regular Expression Lays the groundwork for a proof of equivalence of NFA and RE, w.r.t. described language. Actual connection to NFA comes later, after the groundwork for the opposite direction has been laid. Second chunk of #12648 --- - [x] depends on: #15647 [Data.FinEnum.Option unchanged since then] [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor t-computability merge-conflict awaiting-author awaiting-zulip 298/0 Mathlib.lean,Mathlib/Computability/GNFA.lean,Mathlib/Computability/Language.lean,Mathlib/Computability/RegularExpressions.lean,docs/references.bib 5 7 ['github-actions', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot', 'meithecatte', 'trivial1711'] nobody
185-14737
6 months ago
530-64667
530 days ago
23-54870
23 days
5919 MithicSpirit
author:MithicSpirit
 feat: implement orthogonality for AffineSubspace Define `AffineSubspace.orthogonal` and `AffineSubspace.IsOrtho`, as well as develop an API emulating that of `Submodule.orthogonal` and `Submodule.IsOrtho`, respectively. Additionally, provide some relevant lemmas exclusive to affine subspaces, which are mostly to do with the relationship between orthogonality and `AffineSubspace.Parallel`. Closes #5539 --- Still WIP as I need to add more docstrings as well as notations for the new definitions. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) WIP new-contributor merge-conflict help-wanted t-analysis 287/0 Mathlib.lean,Mathlib/Analysis/InnerProductSpace/AffineSubspace.lean 2 7 ['MithicSpirit', 'eric-wieser', 'github-actions', 'leanprover-community-bot-assistant', 'mathlib4-merge-conflict-bot'] MithicSpirit
assignee:MithicSpirit
184-52594
6 months ago
867-77489
867 days ago
0-433
7 minutes
13442 dignissimus
author:dignissimus
 feat: mabel tactic for multiplicative abelian groups Mabel tactic for multiplicative abelian groups (#10361) --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor merge-conflict modifies-tactic-syntax awaiting-author help-wanted t-meta 439/0 Mathlib.lean,Mathlib/Tactic.lean,Mathlib/Tactic/MAbel.lean,MathlibTest/mabel.lean 4 11 ['BoltonBailey', 'dignissimus', 'github-actions', 'joneugster', 'kbuzzard', 'mathlib4-merge-conflict-bot'] joneugster
assignee:joneugster
184-52330
6 months ago
634-44416
634 days ago
0-16
16 seconds
14237 js2357
author:js2357
 feat: Define the localization of a fractional ideal at a prime ideal Define the localization of a fractional ideal at a prime ideal, and prove some basic properties. --- This PR is part 3 out of 4 of a proof of `isDedekindDomain_iff_isDedekindDomainDvr`. Part 4 is available here: #14242 - [x] depends on: #14099 Part 1 - [x] depends on: #14216 Part 2 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict awaiting-author t-algebra new-contributor
label:t-algebra$
 230/0 Mathlib.lean,Mathlib/RingTheory/FractionalIdeal/LocalizedAtPrime.lean,Mathlib/RingTheory/Localization/Basic.lean 3 22 ['Vierkantor', 'YaelDillies', 'github-actions', 'js2357', 'kbuzzard', 'leanprover-community-bot-assistant', 'leanprover-community-mathlib4-bot', 'mathlib4-merge-conflict-bot'] Vierkantor
assignee:Vierkantor
184-52328
6 months ago
633-26151
633 days ago
6-3525
6 days
15224 AnthonyBordg
author:AnthonyBordg
 feat(CategoryTheory/Sites): covering families and their associated Grothendieck topology Define covering families on a category and their associated Grothendieck topology by using the API for `Coverage`. Give an explicit characterization of the covering sieves of the said topology. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict awaiting-author t-category-theory new-contributor 112/0 Mathlib.lean,Mathlib/CategoryTheory/Sites/CoveringFamilies.lean 2 21 ['AnthonyBordg', 'adamtopaz', 'dagurtomas', 'github-actions', 'joelriou', 'mathlib4-merge-conflict-bot'] nobody
184-52199
6 months ago
660-18430
660 days ago
1-48443
1 day
17587 kmill
author:kmill
 feat: Sym2-as-Finset theory --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-data new-contributor 105/3 Mathlib/Combinatorics/SimpleGraph/Basic.lean,Mathlib/Combinatorics/SimpleGraph/Finite.lean,Mathlib/Data/Sym/Sym2.lean,Mathlib/RingTheory/Polynomial/Vieta.lean 4 11 ['FordUniver', 'YaelDillies', 'github-actions', 'kmill', 'mathlib4-merge-conflict-bot'] nobody
184-52045
6 months ago
unknown
0-0
0 seconds
18630 tomaz1502
author:tomaz1502
 feat(Computability.Timed): Formalization of runtime complexity of List.mergeSort This PR adds the formalization of the runtime complexity of the merge sort algorithm, defined in `Data/List/Sort`. Requires: https://github.com/leanprover-community/mathlib4/pull/15451 References: - Previous PR on mathlib3: https://github.com/leanprover-community/mathlib3/pull/14494/ - First discussion on Zulip: https://leanprover.zulipchat.com/#narrow/stream/113488-general/topic/BSc.20Final.20Project/near/220647062 - Second disussion on Zulip: https://leanprover.zulipchat.com/#narrow/stream/113488-general/topic/Formalization.20of.20Runtime.20Complexity.20of.20Sorting.20Algorithms/near/284184450 --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-computability new-contributor 526/0 Mathlib.lean,Mathlib/Computability/Timed/InsertionSort.lean,Mathlib/Computability/Timed/Merge.lean,Mathlib/Computability/Timed/MergeSort.lean,Mathlib/Computability/Timed/Split.lean 5 9 ['github-actions', 'mathlib4-merge-conflict-bot'] nobody
184-52043
6 months ago
563-17446
563 days ago
0-77273
21 hours
20648 anthonyde
author:anthonyde
 feat: formalize regular expression -> εNFA The file `Computability/RegularExpressionsToEpsilonNFA.lean` contains a formal definition of Thompson's method for constructing an `εNFA` from a `RegularExpression` and a proof of its correctness. --- - [x] depends on: #20644 - [x] depends on: #20645 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-computability awaiting-zulip new-contributor 490/0 Mathlib.lean,Mathlib/Computability/RegularExpressionsToEpsilonNFA.lean,docs/references.bib 3 7 ['anthonyde', 'github-actions', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot', 'meithecatte', 'qawbecrdtey'] nobody
184-51905
6 months ago
381-84834
381 days ago
75-77754
75 days
21903 yhtq
author:yhtq
 feat: add from/toList between `FreeSemigroup` and `List` with relative theorems Add from/toList between `FreeSemigroup` and `List` with relative theorems, as well as an incidental definition of lexicographic order on `FreeSemigroup`. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra new-contributor awaiting-CI large-import merge-conflict
label:t-algebra$
 169/0 Mathlib/Algebra/Free.lean 1 12 ['YaelDillies', 'github-actions', 'mathlib4-merge-conflict-bot'] nobody
184-51765
6 months ago
411-35720
411 days ago
50-9294
50 days
22159 shetzl
author:shetzl
 feat: add definition of pushdown automata Add the definition of pushdown automata and their two acceptance conditions: acceptance based on empty stack and acceptance based on final state. Co-authored-by: Tobias Leichtfried --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-computability awaiting-author new-contributor 70/0 Mathlib.lean,Mathlib/Computability/PDA.lean 2 35 ['YaelDillies', 'github-actions', 'madvorak', 'mathlib4-merge-conflict-bot', 'shetzl'] nobody
184-51759
6 months ago
431-45772
431 days ago
20-81245
20 days
22302 658060
author:658060
 feat: add `CategoryTheory.Topos.Power` This is a continuation of #21281 with the end goal of defining topoi in Mathlib. It introduces the notion of a power object in a category with a subobject classifier, which is a special case of an internal hom. The definition `HasPowerObjects C` contained in this PR is all that remains before `IsTopos C` can be defined. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict awaiting-author t-category-theory new-contributor 312/0 Mathlib.lean,Mathlib/CategoryTheory/Topos/Power.lean 2 3 ['github-actions', 'joelriou', 'mathlib4-merge-conflict-bot'] b-mehta
assignee:b-mehta
184-51750
6 months ago
450-85752
450 days ago
0-1528
25 minutes
22790 mhk119
author:mhk119
 feat: Extend `taylor_mean_remainder_lagrange` to `x < x_0` The `taylor_mean_remainder_lagrange` theorem has the assumption that $x_0 < x$. In many applications, we need $x < x_0$ and one cannot use the current version to obtain this (see [zulip](https://leanprover.zulipchat.com/#narrow/channel/116395-maths/topic/Taylor's.20theorem)). This PR introduces a set of theorems that push negations through Taylor expansions so that one can extend `taylor_mean_remainder_lagrange` to the case when $x < x_0$. These theorems should also be useful elsewhere since they are quite general. merge-conflict awaiting-author t-analysis new-contributor 111/1 Mathlib/Analysis/Calculus/Deriv/Basic.lean,Mathlib/Analysis/Calculus/IteratedDeriv/Lemmas.lean,Mathlib/Analysis/Calculus/Taylor.lean 3 13 ['Paul-Lez', 'github-actions', 'grunweg', 'mathlib4-merge-conflict-bot', 'mhk119'] nobody
184-51737
6 months ago
412-66854
412 days ago
23-16830
23 days
24333 xcloudyunx
author:xcloudyunx
 feat(Combinatorics/SimpleGraph): cycle graph implementation for generic vertex types The existing `cycleGraph` implementation under Combinatorics/SimpleGraph/Circulant.lean only operates over `Fin n`. This PR implements a cycle graph implementation over any generic vertex type. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict awaiting-author t-combinatorics new-contributor 187/0 Mathlib.lean,Mathlib/Combinatorics/SimpleGraph/Cycle.lean 2 42 ['IvanRenison', 'github-actions', 'mathlib4-merge-conflict-bot', 'vlad902'] kmill
assignee:kmill
184-51584
6 months ago
270-50165
270 days ago
123-18878
123 days
25739 literandltx
author:literandltx
 feat(NumberTheory/LegendreSymbol): Add sqrt‐of‐residue theorems for p=4k+3 and p=8k+5 Add a new file `QuadraticResidueRoots.lean` under `Mathlib/NumberTheory/LegendreSymbol/` that proves two explicit “square-root of quadratic residue” theorems for primes of the specific form. - **`exists_sqrt_of_residue_mod4_eq3`** for primes `p = 4*k + 3` - **`exists_sqrt_of_residue_mod8_eq5`** for primes `p = 8*k + 5` It also introduces the helper lemmas `euler_criterion_traditional` and `legendreSym.at_two_mod8_eq_5`. Import lines in `Mathlib.lean` and `Mathlib/NumberTheory/LegendreSymbol/Basic.lean` have been updated accordingly. merge-conflict awaiting-author t-number-theory new-contributor 217/0 Mathlib.lean,Mathlib/NumberTheory/LegendreSymbol/Basic.lean,Mathlib/NumberTheory/LegendreSymbol/QuadraticReciprocity.lean,Mathlib/NumberTheory/LegendreSymbol/QuadraticResidueRoots.lean 4 3 ['github-actions', 'kckennylau', 'mathlib4-merge-conflict-bot'] literandltx
assignee:literandltx
184-51435
6 months ago
326-74998
326 days ago
17-63153
17 days
26165 oliver-butterley
author:oliver-butterley
 feat(MeasureTheory.VectorMeasure): add lemma which shows that variation of a `ℝ≥0∞` VectorMeasure is equal to itself Add a lemma for the variation of a VectorMeasure which tells that if `μ` is `VectorMeasure X ℝ≥0∞` then ``μ.ennrealVariation = μ`. Co-authored-by: @yoh-tanimoto --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-measure-probability awaiting-author merge-conflict blocked-by-other-PR new-contributor 467/0 Mathlib/MeasureTheory/VectorMeasure/Variation/Basic.lean,Mathlib/Order/Partition/Finpartition.lean 3 9 ['github-actions', 'leanprover-radar', 'mathlib4-merge-conflict-bot', 'oliver-butterley', 'yoh-tanimoto'] nobody
184-51246
6 months ago
321-46201
321 days ago
15-66224
15 days
26300 igorkhavkine
author:igorkhavkine
 feat(Analysis/Calculus/FDeriv): continuous differentiability from continuous partial derivatives on an open domain in a product space If a function `f : E × F → G` is continuously differentiable, then its partial derivatives along `E` and `F` are also continuous. The non-trivial converse implication holds when the partial derivatives are continuous on an open domain, and they can be added together to give the total derivative of `f`. See this [#mathlib4 > Partial derivatives @ 💬](https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/Partial.20derivatives/near/520995477) and the containing thread for some discussion. The PR creates a new import (`Mathlib.Analysis.Calculus.FDeriv.Partial`), where other results about partial derivatives could go in the future. --- *this is the migration of #25304 to the PR-from-fork workflow* - [x] depends on: #25564 - [x] depends on: #26273 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) WIP new-contributor awaiting-author t-analysis merge-conflict 468/0 Mathlib/Analysis/Calculus/FDeriv/Partial.lean 3 23 ['YaelDillies', 'agjftucker', 'github-actions', 'igorkhavkine', 'mathlib-merge-conflicts', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot', 'sgouezel'] sgouezel
assignee:sgouezel
184-51223
6 months ago
281-13213
281 days ago
44-77029
44 days
26594 metakunt
author:metakunt
 feat(Algebra/Polynomial/ZMod): Add Polynomial.equiv_of_nat_of_polynomial_zmod This adds an explicit bijection between the naturals and $$\mathbb{Z}/n\mathbb{Z}[X]$$ in a canonical way. --- I feel that some API is missing to make the theorem shorter, I have no idea what lemmas to extract though. Also I don't know when to use spaces and when not, so I did it best effort. merge-conflict awaiting-author t-algebra new-contributor
label:t-algebra$
 465/0 Mathlib.lean,Mathlib/Algebra/Polynomial/ZMod.lean 2 3 ['Ruben-VandeVelde', 'github-actions', 'mathlib4-merge-conflict-bot'] nobody
184-51075
6 months ago
300-8433
300 days ago
25-5233
25 days
26757 fweth
author:fweth
 feat(CategoryTheory/Topos): define elementary topos This commit begins the formalization of the notion of an *elementary topos*, following the definition in \[Mac Lane & Moerdijk, *Sheaves in Geometry and Logic* (1992), Ch. IV, Section 1]. It introduces the file `Mathlib/CategoryTheory/Topos/Basic.lean`, which currently includes: * The definition of an elementary topos. * Proof that the power object map is a functor * Theorem about pullbacks of characterstic maps Subobject classifiers, which are used in the definition, have already been defined in `CategoryTheory/Topos/Classifier.lean` Work in progress: further formalization of the section is planned. Questions: * Should the definition of power objects be separated into its own file/module, perhaps under `CategoryTheory/Topos/PowerObject.lean`? * Is the notation `P` / `P_morph` / `P_functor` for the power object functor on objects / morphisms / total acceptable? * Should the comments and docstrings rather use the notation from the book, where `g ∘ f` denotes arrow composition from righ to left, or the Lean variant `f ≫ g`? Klaus Gy klausgy@gmail.com --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict awaiting-author t-category-theory new-contributor 401/66 Mathlib.lean,Mathlib/CategoryTheory/Closed/PowerObjects.lean,Mathlib/CategoryTheory/Limits/Shapes/BinaryProducts.lean,Mathlib/CategoryTheory/Limits/Shapes/Equalizers.lean,Mathlib/CategoryTheory/Limits/Shapes/Pullback/CommSq.lean,Mathlib/CategoryTheory/Limits/Shapes/Pullback/Equalizer.lean,Mathlib/CategoryTheory/Monoidal/Cartesian/Basic.lean,Mathlib/CategoryTheory/Subobject/Basic.lean,Mathlib/CategoryTheory/Topos/Classifier.lean 9 17 ['fweth', 'github-actions', 'joelriou', 'leanprover-community-bot-assistant', 'mathlib4-merge-conflict-bot'] joelriou
assignee:joelriou
184-51070
6 months ago
214-17689
214 days ago
62-6838
62 days
27155 Pjotr5
author:Pjotr5
 feat: Shearer's bound on the independence number of triangle free graphs I added the file IndependenceNumber.lean to the Mathlib.Combinatorics.SimpleGraph.Triangle folder. It contains a proof of a theorem by Shearer on the independence number of triangle-free graphs . I was told this might be useful to add to Mathlib a Zullip thread linked [here](https://leanprover.zulipchat.com/#narrow/channel/217875-Is-there-code-for-X.3F/topic/Convexity.20of.20a.20specific.20function/with/510469526). I tried to comply as much as I could with the Mathlib style guide, but I realise that there is probably still a significant amount of editing to be done. For one thing: there are probably some lemmas and theorems in there that might be better suited in other files, but since this is my first PR I though I would all put it in one file before starting to edit a bunch of files. I was also advised to split up the file into multiple smaller PRs, but since everything is basically serving this one proof I could not really find a natural way to do that. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict awaiting-author t-combinatorics new-contributor 1266/0 Mathlib.lean,Mathlib/Combinatorics/SimpleGraph/Triangle/IndependenceNumber.lean 2 10 ['Pjotr5', 'github-actions', 'grunweg', 'mathlib4-merge-conflict-bot'] nobody
184-51033
6 months ago
272-21342
272 days ago
39-17587
39 days
27753 YunkaiZhang233
author:YunkaiZhang233
 feat(CategoryTheory): implemented proofs for factorisation categories being equivalent to iterated comma categories in two ways --- Completed one of the tasks in TODOs, shown and implemented the details for (X/C)/f ≌ Factorisation f ≌ f/(C/Y). This is migrated from my previous PR #22390 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict awaiting-author t-category-theory new-contributor 70/1 Mathlib/CategoryTheory/Category/Factorisation.lean 1 13 ['YunkaiZhang233', 'b-mehta', 'github-actions', 'mathlib4-merge-conflict-bot', 'robin-carlier'] nobody
184-50878
6 months ago
295-22041
295 days ago
0-3448
57 minutes
27850 fyqing
author:fyqing
 feat: 0-dimensional manifolds are discrete and countable This is the converse direction of the classification of 0-dimensional manifolds. The other direction was shown in #22105. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict awaiting-author t-differential-geometry new-contributor 80/0 Mathlib.lean,Mathlib/Geometry/Manifold/ZeroDim.lean 2 14 ['fyqing', 'github-actions', 'grunweg', 'mathlib4-merge-conflict-bot', 'tb65536'] grunweg
assignee:grunweg
184-50876
6 months ago
293-83103
293 days ago
0-5718
1 hour
28125 nonisomorphiclinearmap
author:nonisomorphiclinearmap
 feat(Combinatorics): basic definition of simplicial complexes This PR introduces the basic definition of a finite (abstract) simplicial complex, located in Mathlib/Combinatorics/SimplicialComplex/Basic.lean. --- This is our first contribution to mathlib. This work was done as part of the Fields Institute Summer Undergraduate Program on formalization in topological combinatorics. Eventually, we aim to formalize Lovasz's proof of the Kneser Conjecture and this is a small stepping stone in that direction. Some other commits will shortly depend on this one. We would like to acknowledge the Fields Institute for Research in Mathematical Sciences for their sponsorship. We would also like to thank our supervisors, Professor Chris Kapulkin and Mr. Daniel Carranza, for their guidance and support throughout this project. We would also like to thank our group members Tom Lindquist and Quang Minh Nguyen for our fruitful discussions. merge-conflict t-combinatorics new-contributor 374/0 Mathlib.lean,Mathlib/Combinatorics/SimplicialComplex/Basic.lean,Mathlib/Combinatorics/SimplicialComplex/Category.lean,Mathlib/Combinatorics/SimplicialComplex/FacePoset.lean,Mathlib/Combinatorics/SimplicialComplex/Hom.lean 5 2 ['github-actions', 'mathlib4-merge-conflict-bot'] awainverse
assignee:awainverse
184-50744
6 months ago
184-50745
184 days ago
99-64548
99 days
28530 nonisomorphiclinearmap
author:nonisomorphiclinearmap
 feat(Combinatorics/SimplicialComplex/Topology): add standard simplices and geometric realisation (colimit + functoriality) Introduce the standard simplex on a finite vertex set and build the geometric realisation |X| of a simplicial complex. Prove that |X| is the colimit of the face diagram δ_X : X.faces ⥤ TopCat, and define the induced map on realisations |φ| : |X| ⟶ |Y| for a simplicial map φ. Show that the abstract map from colimit functoriality agrees with the concrete push-forward of barycentric coordinates. Package these into a functor SimplicialComplexCat ⥤ TopCat. --- This is our first contribution to mathlib. This work was done as part of the Fields Institute Summer Undergraduate Program on formalization in topological combinatorics. Eventually, we aim to formalize Lovasz's proof of the Kneser Conjecture and this lays the groundwork to do this. We would like to acknowledge the Fields Institute for Research in Mathematical Sciences for their sponsorship. We would also like to thank our supervisors, Professor Chris Kapulkin and Mr. Daniel Carranza, for their guidance and support throughout this project. I would also like to thank our group members Sebastian Kumar, Tom Lindquist and Quang Minh Nguyen for our fruitful discussions. - [ ] depends on: #28125 merge-conflict blocked-by-other-PR t-combinatorics new-contributor 1826/0 Mathlib.lean,Mathlib/Combinatorics/SimplicialComplex/Basic.lean,Mathlib/Combinatorics/SimplicialComplex/Category.lean,Mathlib/Combinatorics/SimplicialComplex/FacePoset.lean,Mathlib/Combinatorics/SimplicialComplex/Hom.lean,Mathlib/Combinatorics/SimplicialComplex/Topology/GeomReal/Basic.lean,Mathlib/Combinatorics/SimplicialComplex/Topology/GeomReal/Colimit.lean,Mathlib/Combinatorics/SimplicialComplex/Topology/GeomReal/Diagram.lean,Mathlib/Combinatorics/SimplicialComplex/Topology/GeomReal/Functor.lean,Mathlib/Combinatorics/SimplicialComplex/Topology/GeomReal/Map.lean,Mathlib/Combinatorics/SimplicialComplex/Topology/Simplex.lean,Mathlib/Combinatorics/SimplicialComplex/Topology/SimplexMap.lean 12 3 ['github-actions', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
184-50730
6 months ago
279-4558
279 days ago
0-591
9 minutes
28871 JaafarTanoukhi
author:JaafarTanoukhi
 feat(Combinatorics/Digraph): Tournaments Define orientations and tournaments. Related to #26771. Co-authored-by: Rida Hamadani --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-combinatorics new-contributor 62/0 Mathlib.lean,Mathlib/Combinatorics/Digraph/Orientation.lean,Mathlib/Combinatorics/Digraph/Tournament.lean 3 6 ['JaafarTanoukhi', 'Rida-Hamadani', 'SnirBroshi', 'github-actions', 'mathlib4-merge-conflict-bot'] kmill
assignee:kmill
184-50591
6 months ago
184-50592
184 days ago
55-54919
55 days
29947 JaafarTanoukhi
author:JaafarTanoukhi
 feat(Combinatorics/Digraph): Maps Ported `SimpleGraph/Maps.lean` to `Digraph/Maps.lean` for future PRs related to issue #[26771](https://github.com/leanprover-community/mathlib4/issues/26771) --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-combinatorics new-contributor 476/0 Mathlib.lean,Mathlib/Combinatorics/Digraph/Maps.lean 2 2 ['github-actions', 'mathlib4-merge-conflict-bot'] awainverse
assignee:awainverse
184-49957
6 months ago
184-49958
184 days ago
54-82760
54 days
14704 Command-Master
author:Command-Master
 feat(FieldTheory): define typeclass for simple extensions, and prove some properties Define `SimpleExtension F K`, which says that `K` is a simple field extension of `F`, and show that together with transcendentality it implies `IsFractionRing F[X] K`. --- - [x] depends on: #14710 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) WIP t-algebra new-contributor merge-conflict awaiting-author
label:t-algebra$
 120/0 Mathlib.lean,Mathlib/FieldTheory/SimpleExtension.lean 2 19 ['Command-Master', 'acmepjz', 'github-actions', 'leanprover-community-mathlib4-bot', 'mathlib4-merge-conflict-bot', 'tb65536'] nobody
184-46789
6 months ago
628-39903
628 days ago
48-65595
48 days
31590 SuccessMoses
author:SuccessMoses
 chore: tag `commutatorElement_def` with `simp` --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) awaiting-author t-algebra new-contributor merge-conflict
label:t-algebra$
 1/0 Mathlib/Algebra/Group/Commutator.lean 1 3 ['github-actions', 'grunweg', 'mathlib-merge-conflicts'] nobody
184-24664
6 months ago
184-24664
184 days ago
6-8213
6 days
11021 jstoobysmith
author:jstoobysmith
 feat(AlgebraicTopology): add join of augmented SSets This pull-request adds the definition of the join of augmented SSets defined as contravariant functors from `WithInitial SimplexCategory` to `Type u`. In addition it shows that the join of two standard augmented SSets is again an augmented SSets. From this the definition of the join of simplicial sets should follow easily. To aid the above theory, an api for `WithInitial SimplexCategory` has been created, with the notion of the `join` and `split` (forming a sort of inverse to join) of objects in this category are defined. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict WIP t-algebraic-topology new-contributor 2137/1 .gitignore,Mathlib.lean,Mathlib/AlgebraicTopology/Join.lean,Mathlib/AlgebraicTopology/SimplexCategory.lean,Mathlib/AlgebraicTopology/SimplexCategoryWithInitial.lean,Mathlib/AlgebraicTopology/SimplicialSet.lean 6 47 ['github-actions', 'jcommelin'] nobody
184-23805
6 months ago
813-77650
813 days ago
1-20227
1 day
18626 hannahfechtner
author:hannahfechtner
 feat: define Artin braid groups Define the Artin braid group on infinitely many strands. Includes a toGroup function which defines a function out of the braid group to any other group (given a function which satisfies the braid relations) (more to come in this file; next up: Artin braid groups on finitely many strands) --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict awaiting-author t-algebra new-contributor
label:t-algebra$
 91/0 Mathlib.lean,Mathlib/GroupTheory/SpecificGroups/BraidGroup/Basic.lean 2 22 ['github-actions', 'hannahfechtner', 'jcommelin', 'joelriou'] nobody
184-23652
6 months ago
547-30531
547 days ago
15-38478
15 days
20029 FrederickPu
author:FrederickPu
 feat(Tactic/simps): allow for Config attributes to be set directly Allow for Config attributes to be set directly when using initialize_simp_projection as per issue #19895 Basically modified initialize_simp_projection so that the user has the option of specifying a tuple of config option values. Ex: ``` initialize_simp_projection MulEquiv (toFun → apply, invFun → symm_apply) (fullyApplied := false) ``` These config options are then converted into projections.  --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict WIP new-contributor t-meta 34/4 Mathlib/Tactic/Simps/Basic.lean 1 11 ['FrederickPu', 'YaelDillies', 'fpvandoorn', 'github-actions', 'leanprover-community-bot-assistant'] nobody
184-23589
6 months ago
520-40838
520 days ago
0-34081
9 hours
21269 658060
author:658060
 feat(CategoryTheory/Topos): basic definitions and results in topos theory This code contains basic definitions and results in topos theory, including the definition of a subobject classifier, power objects, and topoi. It is proved that every topos has exponential objects, i.e. "internal homs". The mathematical content follows chapter IV sections 1-2 of Mac Lane and Moerdijk's text "Sheaves in Geometry and Logic". --- - [x] depends on: #21281 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) WIP t-category-theory new-contributor merge-conflict awaiting-author 1269/0 Mathlib.lean,Mathlib/CategoryTheory/Topos/Basic.lean,Mathlib/CategoryTheory/Topos/Classifier.lean,Mathlib/CategoryTheory/Topos/Exponentials.lean,Mathlib/CategoryTheory/Topos/Power.lean 5 10 ['658060', 'gio256', 'github-actions', 'joelriou', 'mathlib4-dependent-issues-bot'] nobody
184-23562
6 months ago
477-2376
477 days ago
0-13879
3 hours
23990 robertmaxton42
author:robertmaxton42
 feat(Types.Colimits): Quot is functorial and colimitEquivQuot is natural Add `Functor.quotFunctor` to parallel `Functor.sectionsFunctor`, witnessing that `Quot` is functorial; add `colimNatIsoQuotFunctor` to parallel `limNatIsoSectionsFunctor`, witnessing that `colimitEquivQuot` is natural in the diagram $F$. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict awaiting-author t-category-theory new-contributor 33/0 Mathlib/CategoryTheory/Limits/Types/Colimits.lean 1 5 ['github-actions', 'joelriou', 'leanprover-community-bot-assistant', 'robertmaxton42'] nobody
184-23445
6 months ago
396-22380
396 days ago
8-27136
8 days
27991 sinianluoye
author:sinianluoye
 feat(Rat): add Rat.den_eq_of_add_den_eq_one and its dependent lemmas ```lean4 example {q r : ℚ} (h : (q + r).den = 1) : q.den = r.den := by ``` It is so simple, but I couldn't find it in current mathlib repo. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) awaiting-author t-data new-contributor 22/0 Mathlib/Data/Rat/Lemmas.lean 1 33 ['github-actions', 'kim-em', 'mathlib-bors', 'pechersky', 'sinianluoye', 'themathqueen'] pechersky
assignee:pechersky
184-23128
6 months ago
215-46722
215 days ago
74-56654
74 days
28215 5hv5hvnk
author:5hv5hvnk
 feat: strong and Weak connectivity for Digraphs strong and weak connectivity in Digraphs --- Should resolve a part of issue #26771 Main additions in the PR: 1. Walks in Digraphs (Walk.lean) - Basic walk structure with start and end vertices - Support for walk operations: append, reverse, length - Support functions: getVert, copy, support 2. Walk Decompositions (WalkDecomp.lean) - takeUntil and dropUntil functions to split walks - rotate operation for loop walks - Theorems relating to walk decomposition properties 3. Subgraphs (subgraph.lean) - Subgraph structure for digraphs - Induced and spanning subgraph predicates - Lattice structure (sup, inf, top, bot) - Coercion to standalone digraphs 4. Paths (Paths.lean) - Trail, Path, Circuit, Cycle definitions - Path structure with no repeating vertices - Theorems relating different path types - Basic connectivity definitions (reachable, weakly/strongly connected) 5. Connectivity (Connected.lean) - Reachability relations and properties - Strong and weak connectivity definitions - Connected component types: - StronglyConnectedComponent - WeaklyConnectedComponent - ConnectedComponent - Component properties and equivalence relations --> [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) WIP new-contributor merge-conflict awaiting-author t-combinatorics 1266/0 Mathlib.lean,Mathlib/Combinatorics/Digraph/Connected.lean,Mathlib/Combinatorics/Digraph/Paths.lean,Mathlib/Combinatorics/Digraph/Subgraph.lean,Mathlib/Combinatorics/Digraph/Walk.lean,Mathlib/Combinatorics/Digraph/WalkDecomp.lean 6 4 ['github-actions', 'grunweg', 'mathlib4-merge-conflict-bot'] nobody
184-23107
6 months ago
272-20689
272 days ago
12-41939
12 days
29574 JarodAlper
author:JarodAlper
 feat: regular local rings are domains We have added three new files in Mathlib/RingTheory/LocalRing * EmbeddingDimension.lean * LocalRingDimension.lean * RegularLocalRings.lean We have added two lemmas and an instance in Mathlib/RingTheory/LocalRing/RingHom/Basic.lean This work was done by Jarod Alper and Brian Nugent. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-ring-theory new-contributor 910/3 Mathlib.lean,Mathlib/RingTheory/LocalRing/EmbeddingDimension.lean,Mathlib/RingTheory/LocalRing/LocalRingDimension.lean,Mathlib/RingTheory/LocalRing/RegularLocalRings.lean,Mathlib/RingTheory/LocalRing/RingHom/Basic.lean,lake-manifest.json 6 2 ['github-actions', 'mathlib4-merge-conflict-bot'] nobody
184-22996
6 months ago
251-24251
251 days ago
1-50449
1 day
28718 imbrem
author:imbrem
 feat: class for chosen finite coproducts Added basic `ChosenFiniteCoproducts` class, and started porting some of the lemmas about `ChosenFiniteProducts` suitably translated --- This, combined with #20182 modified to use chosen finite coproducts and premonoidal categories (#21488), should be enough for me to formalize strong Elgot categories, and hence a lot of categorical iteration theory for my PhD thesis. Re-done from #21603 to deal with changes in #24399 and #24390 Eventually, if we really want to harmonize approaches, we could introduce an `AddMonoidalCategory` struct and do the analogous to #24399 and #24390 for additive monoidal structure, but that seems like a massive overcomplication for now. It would allow formalizing fun things like rig categories, though. - [ ] depends on: #30150 blocked-by-other-PR t-category-theory new-contributor merge-conflict awaiting-author 290/0 Mathlib.lean,Mathlib/CategoryTheory/ChosenFiniteCoproducts.lean 2 9 ['YaelDillies', 'github-actions', 'imbrem', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot', 'robin-carlier'] nobody
184-22908
6 months ago
274-59462
274 days ago
0-24930
6 hours
26765 KiringYJ
author:KiringYJ
 feat(MeasureTheory/PiSystem): add π-λ theorem and SetLike instance Add two small features to `MeasureTheory/PiSystem`: 1. SetLike instance `instance : SetLike (DynkinSystem α) (Set α)` This lets us write `s ⊆ d` and `t ∈ d` for a DynkinSystem `d`, matching usual mathlib style. 2. `DynkinSystem.pi_lambda` lemma Classical π‑λ theorem: if a π‑system `s` is contained in a Dynkin system `d`, every set measurable for `σ(s)` is also in `d`. Currently, mathlib exposes this result only indirectly (e.g. via `generateFrom_eq`). Although logically equivalent, it is not obvious at first glance that those lemmas are the π‑λ theorem. The new lemma states the result in its familiar textbook form, so users can recognise and cite it immediately. Both pieces are under 10 lines, term‑mode only, and do not modify existing APIs. No breaking changes. No dependencies. awaiting-author t-measure-probability new-contributor 13/0 Mathlib/MeasureTheory/PiSystem.lean 1 14 ['EtienneC30', 'KiringYJ', 'dagurtomas', 'github-actions', 'ocfnash'] RemyDegenne
assignee:RemyDegenne
184-9304
6 months ago
184-9304
184 days ago
138-3922
138 days
30637 strihanje01
author:strihanje01
 feat(Combinatorics/SetFamily/Lindstrom): Lindstrom's theorem for subfamilies with equal unions add Lindstrom's theorem and its strengthening for equal intersections --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-combinatorics new-contributor 209/0 Mathlib/Combinatorics/SetFamily/Lindstrom.lean 1 2 ['github-actions', 'mathlib4-merge-conflict-bot'] b-mehta
assignee:b-mehta
181-31453
6 months ago
184-49612
184 days ago
31-61152
31 days
31796 dobronx1325
author:dobronx1325
 feat(Data/Real/EReal): add mul_lt_mul_of_pos_left theorem This PR adds the theorem `EReal.mul_lt_mul_of_pos_left`, which states that for a positive real number `a` and extended reals `b < c`, left multiplication by `a` preserves the strict order: `(a : EReal) * b < (a : EReal) * c`. The theorem complements existing order-preserving properties for addition in `EReal` and extends the algebraic structure for multiplication. The proof uses basic properties of extended reals and order relations. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-data new-contributor 23/0 Mathlib/Data/EReal/Operations.lean 1 4 ['JovanGerb', 'LLaurance', 'dobronx1325', 'github-actions'] nobody
177-65495
5 months ago
178-35407
178 days ago
6-24874
6 days
32169 saodimao20
author:saodimao20
 feat: add convolution_comp_add_right This PR adds a lemma `convolution_comp_translation_right` showing that convolution commutes with translation on the right operand. Specifically, it proves that for an additive commutative group $G$, the convolution of a function $f$ with a translated function $x \mapsto g(a + x)$ is equal to the convolution of $f$ and $g$ evaluated at $x + a$. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-analysis new-contributor awaiting-author 14/0 Mathlib/Analysis/Convolution.lean 1 3 ['github-actions', 'urkud'] nobody
175-51875
5 months ago
175-51875
175 days ago
0-82278
22 hours
32126 nielsvoss
author:nielsvoss
 feat(Analysis/Normed/Operator): definition of singular values for linear maps This PR defines a generalization of singular values, the approximation numbers, for continuous linear maps between normed vector spaces. It proves basic lemmas about the approximation numbers and shows that for finite-dimensional vector spaces, the approximation numbers coincide with the standard definition of singular values. See the discussion on Zulip: https://leanprover.zulipchat.com/#narrow/channel/217875-Is-there-code-for-X.3F/topic/Singular.20Value.20Decomposition/with/558914024 Co-authored-by: Arnav Mehta Co-authored-by: Rawad Kansoh --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) WIP t-analysis new-contributor 331/0 Mathlib/Analysis/Normed/Operator/SingularValues.lean 1 2 ['github-actions', 'nielsvoss'] nobody
175-3016
5 months ago
unknown
0-0
0 seconds
31898 ntapiam
author:ntapiam
 feat(LinearAlgebra/TensorAlgebra): implement HopfAlgebra for TensorAlgebra implementation of the natural Hopf algebra structure on the TensorAlgebra new-contributor t-ring-theory awaiting-author 253/0 Mathlib.lean,Mathlib/Algebra/FreeAlgebra.lean,Mathlib/LinearAlgebra/TensorAlgebra/Basic.lean,Mathlib/RingTheory/Bialgebra/FreeAlgebra.lean,Mathlib/RingTheory/Bialgebra/TensorAlgebra.lean,Mathlib/RingTheory/HopfAlgebra/TensorAlgebra.lean 6 64 ['YaelDillies', 'github-actions', 'kckennylau', 'ntapiam'] nobody
168-23852
5 months ago
180-77065
180 days ago
0-33607
9 hours
30525 515801431
author:515801431
 feat(Mathlib/Combinatorics/Enumerative/Polya): Add Polya Counting This PR introduces basic definitions and results about colorings under permutation group actions. A coloring is defined as a function X → Y, and the permutation group Equiv.Perm X acts on colorings by precomposition: (g • c) x = c (g⁻¹ • x) This formalizes the natural action of relabeling the elements of X. Main definitions MulAction (Equiv.Perm X) (X → Y): The action of the permutation group on colorings via precomposition. coloringEquiv (c₁ c₂ : X → Y) : Prop: Two colorings are equivalent if they lie in the same orbit under this action, i.e. ∃ f : Equiv.Perm X, f • c₁ = c₂. Main results smul_eq_iff_mem_stabilizer: Characterizes when two group actions on the same coloring are equal, showing that g • c = f • c ↔ f⁻¹ * g ∈ stabilizer c. coloringEquiv_equivalence: Proves that coloringEquiv defines an equivalence relation on X → Y. orbit_size_eq_index: Reformulates the orbit–stabilizer theorem in the context of colorings: |orbit c| = |Perm X| / |stabilizer c| Motivation These results provide foundational infrastructure for studying Burnside’s lemma and Pólya’s enumeration theorem in Mathlib, where the enumeration of distinct colorings up to symmetry plays a central role. t-combinatorics new-contributor awaiting-author merge-conflict 113/0 Mathlib.lean,Mathlib/Combinatorics/Enumerative/Polya.lean 2 8 ['IvanRenison', 'alreadydone', 'github-actions', 'mathlib4-merge-conflict-bot'] awainverse
assignee:awainverse
168-10614
5 months ago
176-54157
176 days ago
39-43570
39 days
31113 515801431
author:515801431
 feat(Mathlib/Combinatorics/Enumerative/Polya.lean): Add additional theorem in `Polya.lean` --- - [ ] depends on: #30525 --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-combinatorics new-contributor blocked-by-other-PR merge-conflict 302/0 Mathlib.lean,Mathlib/Combinatorics/Enumerative/Polya.lean 2 4 ['github-actions', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] b-mehta
assignee:b-mehta
168-10490
5 months ago
177-32916
177 days ago
16-78251
16 days
24441 MrSumato
author:MrSumato
 feat(Data/List): add Lyndon-Schutzenberger theorem on list commutativity Add Lyndon-Schutzenberger theorem on list commutativity. Included definition for List.repeatSelf that returns list repeated n times. --- This is my first mathlib PR, so any comments are highly appreciated. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict awaiting-author t-data new-contributor 129/1 Mathlib.lean,Mathlib/Data/List/Commutativity.lean,Mathlib/Data/List/Defs.lean,Mathlib/Data/List/Lemmas.lean 4 38 ['MrSumato', 'github-actions', 'grunweg', 'madvorak', 'mathlib4-merge-conflict-bot', 'plp127'] grunweg
assignee:grunweg
168-6092
5 months ago
350-32436
350 days ago
29-59355
29 days
31147 daefigueroa
author:daefigueroa
 feat(Dynamics): point transitive monoid actions and transitive points We define point transitivity for a monoid action on a topological space and define the set of transitive points. We add some basic lemmas and implications between topological transitivity and point transitivity. --- - [x] depends on: #28001 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-dynamics new-contributor awaiting-author 114/6 Mathlib/Dynamics/Transitive.lean 1 6 ['github-actions', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot', 'sgouezel'] sgouezel
assignee:sgouezel
165-31325
5 months ago
165-31325
165 days ago
18-38983
18 days
31987 saodimao20
author:saodimao20
 feat: add monotonicity and relation lemmas for mgf and cgf Add two lemmas about moment-generating and cumulant-generating functions: - `mgf_mono_in_t_of_nonneg`: For nonnegative random variables, the mgf is monotone in the parameter `t` - `cgf_zero_of_mgf_one`: The cgf equals zero iff the mgf equals one These lemmas are useful for studying properties of mgf and cgf in probability theory. Contributed by sequential-intelligence-lab(SIL), University of Virginia --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-measure-probability new-contributor awaiting-author 21/0 Mathlib/Probability/Moments/Basic.lean 1 5 ['DavidLedvinka', 'github-actions'] RemyDegenne
assignee:RemyDegenne
159-23431
5 months ago
159-23431
159 days ago
21-31799
21 days
32938 0xTerencePrime
author:0xTerencePrime
 feat(Order/LocallyFinite): prove DenselyOrdered and LocallyFiniteOrder are incompatible ## Summary This PR proves that a nontrivial densely ordered linear order cannot be locally finite. ## Main results * `not_locallyFiniteOrder`: A densely ordered locally finite linear order must be subsingleton. * `not_locallyFiniteOrder_of_nontrivial`: The main theorem - incompatibility of the two properties. Note: This implementation imports `Mathlib.Order.Interval.Set.Infinite` to reuse the existing `Set.Icc_infinite` theorem, ensuring standard library consistency. ## Mathematical content The key insight is that in a densely ordered type, we can always find a new element between any two distinct elements. This means any nontrivial interval contains infinitely many elements. However, `LocallyFiniteOrder` requires intervals to be finite. This contradiction implies that such a type cannot exist (unless it is trivial). ## Motivation This resolves a TODO mentioned in #7987 (Data/Finset/LocallyFinite entry). ## Verification - [x] `lake build Mathlib.Order.LocallyFinite.Basic` passes - [x] `lake exe runLinter Mathlib.Order.LocallyFinite.Basic` passes t-order new-contributor awaiting-author 28/0 Mathlib/Order/Interval/Finset/Basic.lean 1 10 ['0xTerencePrime', 'CoolRmal', 'github-actions', 'jcommelin', 'plp127'] nobody
154-46833
5 months ago
154-46873
154 days ago
3-22290
3 days
32698 farruhx
author:farruhx
 feat(List): add aesop / simp annotations to selected lemmas for improved automation This PR adds `@[aesop safe]` and `@[simp]` annotations to a set of List lemmas whose proofs are routine and benefit from standardized automation. No statements or definitions are changed; only proof annotations are added. The lemmas updated in this PR are: * `or_exists_of_exists_mem_cons` * `append_subset_of_subset_of_subset` * `map_subset_iff` * `append_eq_has_append` * `append_right_injective` * `append_left_injective` * `reverse_surjective` * `reverse_bijective` * `mem_getLast?_append_of_mem_getLast?` * `mem_dropLast_of_mem_of_ne_getLast` * `idxOf_eq_length_iff` * `idxOf_append_of_mem` * `length_eraseP_add_one` The goal is to make these commonly used lemmas easier for `aesop`-based automation to resolve, while avoiding any interference with simp-normal-form lemmas or canonical rewrite rules. There are no API changes and no new theorems—only improved automation behavior. t-data new-contributor awaiting-author 18/1 Mathlib/Data/List/Basic.lean 1 8 ['artie2000', 'euprunin', 'farruhx', 'github-actions'] pechersky
assignee:pechersky
153-81602
5 months ago
153-81602
153 days ago
7-31364
7 days
27817 zhuyizheng
author:zhuyizheng
 feat: add IMO2025P1 Add a solution to IMO2025P1, the original problem statement from https://github.com/jsm28/IMOLean --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) IMO awaiting-author new-contributor merge-conflict 1310/0 Archive.lean,Archive/Imo/Imo2025Q1.lean 2 9 ['github-actions', 'kim-em', 'mathlib4-merge-conflict-bot', 'zhuyizheng'] dwrensha
assignee:dwrensha
153-27399
5 months ago
212-78367
212 days ago
59-36769
59 days
33218 Blackfeather007
author:Blackfeather007
 feat(Algebra): Define the associated graded ring to filtered ring Define the associated graded ring to a filtered ring. --- - [ ] depends on: #33217 migrated from https://github.com/leanprover-community/mathlib4/pull/26858 t-ring-theory new-contributor blocked-by-other-PR 450/0 Mathlib.lean,Mathlib/RingTheory/FilteredAlgebra/AssociatedGraded.lean 2 2 ['github-actions', 'mathlib4-dependent-issues-bot'] nobody
150-60064
4 months ago
150-65349
150 days ago
0-132
2 minutes
33219 Blackfeather007
author:Blackfeather007
 feat(Algebra): Define associated graded algebra Define the associated graded algebra of a filtered algebra, constructed from a special case of associated graded ring. --- - [ ] depends on: #33218 migrated from #26859 t-ring-theory new-contributor blocked-by-other-PR 563/0 Mathlib.lean,Mathlib/RingTheory/FilteredAlgebra/AssociatedGraded.lean 2 2 ['github-actions', 'mathlib4-dependent-issues-bot'] nobody
150-59956
4 months ago
150-65123
150 days ago
0-133
2 minutes
33220 Blackfeather007
author:Blackfeather007
 feat(Algebra): Define associated graded module Define the associated graded module to a filtered module. --- - [ ] depends on: #33218 migrated from #26860 t-ring-theory new-contributor blocked-by-other-PR 669/0 Mathlib.lean,Mathlib/RingTheory/FilteredAlgebra/AssociatedGraded.lean 2 2 ['github-actions', 'mathlib4-dependent-issues-bot'] nobody
150-59872
4 months ago
150-64935
150 days ago
0-137
2 minutes
33227 Blackfeather007
author:Blackfeather007
 feat(Algebra): exact of associated graded exact We proved that a chain complex is exact if its associated graded complex is exact. Co-authored-by: Huanyu Zheng @Yu-Misaka [suzuka@misaka-yu.com](mailto:suzuka@misaka-yu.com) Co-authored-by: Yi Yuan @yuanyi-350 [kysyy1@126.com](mailto:kysyy1@126.com) Co-authored-by: Weichen Jiao @AlbertJ-314 [albertjiao314@gmail.com](mailto:albertjiao314@gmail.com) --- - [ ] depends on: #33226 migrated from #26869 t-ring-theory new-contributor blocked-by-other-PR 728/0 Mathlib.lean,Mathlib/RingTheory/FilteredAlgebra/AssociatedGraded.lean,Mathlib/RingTheory/FilteredAlgebra/Exactness.lean,Mathlib/RingTheory/FilteredAlgebra/FilteredHom.lean 4 2 ['github-actions', 'mathlib4-dependent-issues-bot'] nobody
150-57544
4 months ago
150-57545
150 days ago
0-1208
20 minutes
33226 Blackfeather007
author:Blackfeather007
 feat(Algebra): associated graded exact of exact and strict In this file, we define the concept of exhaustive filtrations. We also prove a AssociatedGradedRingHom sequence is exact iff each GradedPieceHom is exact. And when a sequence is strict exact, the corresponding AssociatedGradedRingHom sequence is also exact. Co-authored-by: Huanyu Zheng @Yu-Misaka [suzuka@misaka-yu.com](mailto:suzuka@misaka-yu.com) Co-authored-by: Yi Yuan @yuanyi-350 [kysyy1@126.com](mailto:kysyy1@126.com) Co-authored-by: Weichen Jiao @AlbertJ-314 [albertjiao314@gmail.com](mailto:albertjiao314@gmail.com) --- - [ ] depends on: #33222 migrated from #26868 t-ring-theory new-contributor blocked-by-other-PR 529/0 Mathlib.lean,Mathlib/RingTheory/FilteredAlgebra/AssociatedGraded.lean,Mathlib/RingTheory/FilteredAlgebra/Exactness.lean,Mathlib/RingTheory/FilteredAlgebra/FilteredHom.lean 4 2 ['github-actions', 'mathlib4-dependent-issues-bot'] nobody
150-57542
4 months ago
150-57543
150 days ago
0-1307
21 minutes
33225 Blackfeather007
author:Blackfeather007
 feat(Algebra): filtered module hom In this PR we defined the filtered semi-linear map for filtered module and the associated graded module hom. --- - [ ] depends on: #33220 - [ ] depends on: #33223 migrated from #26867 t-ring-theory new-contributor blocked-by-other-PR 1205/0 Mathlib.lean,Mathlib/RingTheory/FilteredAlgebra/AssociatedGraded.lean,Mathlib/RingTheory/FilteredAlgebra/FilteredHom.lean 3 2 ['github-actions', 'mathlib4-dependent-issues-bot'] nobody
150-57541
4 months ago
150-57542
150 days ago
0-1805
30 minutes
33224 Blackfeather007
author:Blackfeather007
 feat(Algebra): define filtered alghom In this PR, we define the filtered algebra homomorphisms on algebras and prove some basic properties of them. --- - [ ] depends on: #33219 - [ ] depends on: #33223 migrated from #26863 t-ring-theory new-contributor blocked-by-other-PR 1055/0 Mathlib.lean,Mathlib/RingTheory/FilteredAlgebra/AssociatedGraded.lean,Mathlib/RingTheory/FilteredAlgebra/FilteredHom.lean 3 2 ['github-actions', 'mathlib4-dependent-issues-bot'] nobody
150-57539
4 months ago
150-57540
150 days ago
0-2046
34 minutes
33223 Blackfeather007
author:Blackfeather007
 feat(Algebra): define filtered ring homomorphism In this PR, we define the filtered ring morphisms on rings and prove some basic properties of them. Co-authored-by: Huanyu Zheng @Yu-Misaka [suzuka@misaka-yu.com](mailto:suzuka@misaka-yu.com) Co-authored-by: Yi Yuan @yuanyi-350 [kysyy1@126.com](mailto:kysyy1@126.com) Co-authored-by: Weichen Jiao @AlbertJ-314 [albertjiao314@gmail.com](mailto:albertjiao314@gmail.com) --- - [ ] depends on: #33218 - [ ] depends on: #33222 migrated from #26862 t-ring-theory new-contributor blocked-by-other-PR 824/0 Mathlib.lean,Mathlib/RingTheory/FilteredAlgebra/AssociatedGraded.lean,Mathlib/RingTheory/FilteredAlgebra/FilteredHom.lean 3 2 ['github-actions', 'mathlib4-dependent-issues-bot'] nobody
150-57536
4 months ago
150-57539
150 days ago
0-2257
37 minutes
33222 Blackfeather007
author:Blackfeather007
 feat(Algebra): define filtered add group hom In this file we define filtered hom and the corresponding associated graded hom for abelian groups. Co-authored-by: Huanyu Zheng @Yu-Misaka [suzuka@misaka-yu.com](mailto:suzuka@misaka-yu.com) Co-authored-by: Yi Yuan @yuanyi-350 [kysyy1@126.com](mailto:kysyy1@126.com) Co-authored-by: Weichen Jiao @AlbertJ-314 [albertjiao314@gmail.com](mailto:albertjiao314@gmail.com) --- - [ ] depends on: #33217 migrated from #26861 new-contributor t-ring-theory blocked-by-other-PR 368/0 Mathlib.lean,Mathlib/RingTheory/FilteredAlgebra/AssociatedGraded.lean,Mathlib/RingTheory/FilteredAlgebra/FilteredHom.lean 3 2 ['github-actions', 'mathlib4-dependent-issues-bot'] nobody
150-57535
4 months ago
150-57536
150 days ago
0-2249
37 minutes
32264 jjtowery
author:jjtowery
 feat(Bicategory): add lax slice bicategory --- In this PR, I define the lax slice bicategory for a lax functor over an object. I also give the change of slice strict pseudofunctor. These are from Section 7.1 of Johnson & Yau and are essential for their Whitehead theorem for bicategories (lax functor biequivalence iff essentially surjective, essentially full, and fully faithful), which I'd like to prove at some point. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-category-theory new-contributor awaiting-author 527/0 Mathlib.lean,Mathlib/CategoryTheory/Bicategory/LaxSlice.lean 2 12 ['dagurtomas', 'github-actions', 'jjtowery', 'robin-carlier'] dagurtomas
assignee:dagurtomas
146-86021
4 months ago
170-3078
170 days ago
3-47959
3 days
32960 dleijnse
author:dleijnse
 feat(FieldTheory): adjoin pth roots For a field `k` of exponential characteristic `p` and a subset `S` of `k`, we define the extension of `k` obtained by adjoining all `p`-th roots of elements of `S`. We prove that this is a purely inseparable extension, and provide some basic API. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra new-contributor awaiting-author
label:t-algebra$
 131/0 Mathlib.lean,Mathlib/FieldTheory/PurelyInseparable/AdjoinPthRoots.lean 2 13 ['artie2000', 'chrisflav', 'dleijnse', 'erdOne', 'github-actions', 'leanprover-radar'] erdOne
assignee:erdOne
146-16273
4 months ago
146-16273
146 days ago
10-12739
10 days
33163 Aaron1011
author:Aaron1011
 feat: prove subgroup of (M -> Z) is finitely generated --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-ring-theory new-contributor awaiting-author 5/0 Mathlib/RingTheory/DedekindDomain/Dvr.lean 1 2 ['erdOne', 'github-actions'] alreadydone
assignee:alreadydone
146-9223
4 months ago
146-9223
146 days ago
5-81520
5 days
33133 0xTerencePrime
author:0xTerencePrime
 feat(Algebra/Group/Center): add Decidable (IsMulCentral a) instance This PR adds a `Decidable` instance for `IsMulCentral a`. ### Summary The structure `IsMulCentral` was missing a `Decidable` instance. This PR provides the instance by leveraging `isMulCentral_iff`, enabling decidability for both multiplicative and additive (via `to_additive`) structures. ### Verification - `lake build Mathlib.Algebra.Group.Center` passed. - `lake exe runLinter Mathlib.Algebra.Group.Center` passed. t-algebra new-contributor awaiting-author
label:t-algebra$
 7/0 Mathlib/Algebra/Group/Center.lean 1 3 ['github-actions', 'robin-carlier'] ocfnash
assignee:ocfnash
140-37414
4 months ago
140-37414
140 days ago
12-60805
12 days
33502 MrQubo
author:MrQubo
 fix(Tactic/ProxyType): Pass params explicitly in proxy_equiv% implementation Fix [#mathlib4 > `deriving Fintype` with Prop](https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/.60deriving.20Fintype.60.20with.20Prop/with/566118621) --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor t-meta WIP 12/2 Mathlib/Tactic/ProxyType.lean,MathlibTest/DeriveFintype.lean 2 7 ['MrQubo', 'github-actions', 'kmill'] kmill
assignee:kmill
139-4338
4 months ago
139-4339
139 days ago
0-60133
16 hours
17176 arulandu
author:arulandu
 feat: integrals and integrability with .re Lemmas for swapping order of .re and integration/integrability. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict awaiting-author new-contributor t-measure-probability please-adopt 49/0 Mathlib/MeasureTheory/Function/L1Space.lean,Mathlib/MeasureTheory/Integral/IntegrableOn.lean,Mathlib/MeasureTheory/Integral/IntervalIntegral.lean,Mathlib/MeasureTheory/Integral/SetIntegral.lean 4 32 ['EtienneC30', 'arulandu', 'github-actions', 'loefflerd'] nobody
137-7336
4 months ago
584-54573
584 days ago
9-73631
9 days
33330 michael-novak-math
author:michael-novak-math
 feat: add arc-length reparametrization of parametrized curves add new definitions of arc-length reparametrization and its corresponding parameter transformation and a theorem establishing the desired properties. t-analysis new-contributor awaiting-author merge-conflict 311/0 Mathlib.lean,Mathlib/Analysis/Calculus/ArcLengthReparametrization.lean,Mathlib/MeasureTheory/Integral/IntervalIntegral/FundThmCalculus.lean,docs/references.bib 5 57 ['SnirBroshi', 'github-actions', 'grunweg', 'j-loreaux', 'mathlib-merge-conflicts', 'mathlib4-merge-conflict-bot', 'michael-novak-math'] j-loreaux
assignee:j-loreaux
134-74691
4 months ago
59-49418
59 days ago
6-69934
6 days
33756 dleijnse
author:dleijnse
 feat(FieldTheory): root of polynomial with p power coefficients This PR proves the results in https://stacks.math.columbia.edu/tag/031V, which gives a criterion for a root of a polynomial over a field `k` of characteristic `p` to be a `p`-th power. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra new-contributor
label:t-algebra$
 88/0 Mathlib.lean,Mathlib/FieldTheory/PthPowerCoeffPoly.lean 2 1 ['github-actions'] nobody
134-25836
4 months ago
unknown
0-0
0 seconds
33299 kingiler
author:kingiler
 feat: Add decidable membership for Interval Implemented membership and corresponding decidable instance for `Interval`. Related [#mathlib4 > Proposal: Add decidable membership for Interval](https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/Proposal.3A.20Add.20decidable.20membership.20for.20Interval/with/565438009). --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) awaiting-author new-contributor t-order 16/1 Mathlib/Order/Interval/Basic.lean 1 5 ['Vierkantor', 'eric-wieser', 'github-actions', 'kingiler'] Vierkantor
assignee:Vierkantor
134-17642
4 months ago
134-17642
134 days ago
13-42146
13 days
30142 shalliso
author:shalliso
 feat(Topology/Baire): define IsNonMeagre non-meagre sets (also known as "of the second category") are worthy of their own definition and API. This was useful to me for formalizing a result of "automatic continuity", that is, a Baire-measurable homomorphism between Polish groups must be continuous. Simply working with the negation of IsMeagre quickly became cumbersome, and non-meagre sets have an important role in the study of Polish (e.g. locally compact) groups. From https://github.com/shalliso/automatic_continuity --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-topology new-contributor merge-conflict awaiting-author 83/1 Mathlib/Topology/Baire/NonMeagre.lean,Mathlib/Topology/GDelta/Basic.lean 2 6 ['github-actions', 'grunweg', 'mathlib4-merge-conflict-bot'] nobody
133-27326
4 months ago
133-27327
133 days ago
98-58846
98 days
32880 0xTerencePrime
author:0xTerencePrime
 feat(Analysis/Asymptotics): define subpolynomial growth ## Main definitions * `Asymptotics.IsSubpolynomial l f g`: A function `f` has subpolynomial growth with respect to `g` along filter `l` if `f = O(1 + ‖g‖^k)` for some natural `k`. ## Main results * `IsSubpolynomial.const`: Constant functions have subpolynomial growth * `IsSubpolynomial.id`: Identity has subpolynomial growth * `IsSubpolynomial.add`: Closure under addition * `IsSubpolynomial.neg`: Closure under negation * `IsSubpolynomial.sub`: Closure under subtraction * `IsSubpolynomial.mul`: Closure under multiplication * `IsSubpolynomial.pow`: Closure under powers * `isSubpolynomial_iff_one_add`: Equivalence with `(1 + ‖g‖)^k` formulation * `IsSubpolynomial.uniform`: Uniform bounds for finite families ## Implementation notes The definition uses `1 + ‖g‖^k` rather than `(1 + ‖g‖)^k` as the primary form, with the equivalence established in `isSubpolynomial_iff_one_add`. Four private auxiliary lemmas handle the key inequalities needed for closure proofs. Closes #32658 awaiting-author t-analysis new-contributor 185/0 Mathlib.lean,Mathlib/Analysis/Asymptotics/Subpolynomial.lean 2 29 ['0xTerencePrime', 'ADedecker', 'github-actions', 'j-loreaux'] ADedecker
assignee:ADedecker
130-10410
4 months ago
130-78268
130 days ago
22-14560
22 days
33948 anivegesana
author:anivegesana
 feat(Analysis/Normed/Algebra): matrix exponential of nilpotent matrix Where the matrix exponential and nilpotent elements are defined, both the matrix exponential and the nilpotent element exponential. I had to add a different theorem for normed space exponential and the matrix exponential since the right instances wouldn't be synthesized. Help with golfing would be appreciated. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor t-analysis 34/0 Mathlib/Analysis/Normed/Algebra/Exponential.lean,Mathlib/Analysis/Normed/Algebra/MatrixExponential.lean 2 1 ['github-actions'] nobody
128-61395
4 months ago
128-61467
128 days ago
128-61179
128 days
30391 rudynicolop
author:rudynicolop
 feat(Data/List): list splitting definitions and lemmas This PR continues the work from #24395. Original PR: https://github.com/leanprover-community/mathlib4/pull/24395 t-data new-contributor awaiting-author 108/2 Mathlib/Data/List/Perm/Lattice.lean,Mathlib/Data/List/TakeDrop.lean 2 50 ['BoltonBailey', 'IlPreteRosso', 'TwoFX', 'Vierkantor', 'github-actions', 'kckennylau', 'mathlib4-merge-conflict-bot', 'rudynicolop'] TwoFX
assignee:TwoFX
126-28741
4 months ago
126-37263
126 days ago
93-10043
93 days
29282 Jlh18
author:Jlh18
 feat(CategoryTheory): HasColimits instance on Grpd Show that the category of groupoids has all small colimits, as a coreflective subcategory of `Cat`, which has all small colimits. The right adjoint of the forgetful functor is the core functor `CategoryTheory.Core.functor`. - [ ] depends on: #29283 [Core of a category as a functor] --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict blocked-by-other-PR new-contributor t-category-theory 140/4 Mathlib.lean,Mathlib/AlgebraicTopology/FundamentalGroupoid/InducedMaps.lean,Mathlib/CategoryTheory/Category/Grpd.lean,Mathlib/CategoryTheory/Core.lean,Mathlib/CategoryTheory/Groupoid/Grpd/Colimit.lean,Mathlib/CategoryTheory/Groupoid/Grpd/Core.lean 6 3 ['github-actions', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
124-38821
4 months ago
261-70605
261 days ago
0-396
6 minutes
32745 LTolDe
author:LTolDe
 feat(Topology/Algebra): add MulActionConst.lean add Topology/Algebra/MulActionConst.lean introduce class `ContinuousSMulConst` for a scalar multiplication that is continuous in the first argument, in analogy to `ContinuousConstSMul` define `MulAction.ball x U` as the set `U • {x}` given `[SMul G X] (x : X) (U : Set G)` The lemmas shown here will be useful to prove the **Effros Theorem**, see [zulip](https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/Effros.20Theorem/with/558712441). --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) awaiting-author new-contributor t-topology 117/0 Mathlib.lean,Mathlib/Topology/Algebra/MulActionConst.lean 2 8 ['LTolDe', 'github-actions', 'urkud'] nobody
123-24687
4 months ago
130-4217
130 days ago
16-33128
16 days
33478 anishrajeev
author:anishrajeev
 feat(ModelTheory): define a subset of the topology over complete types Define a subset of the Stone Space over a language expanded with countably many constants. Define the proposition to indicate if a language is countable. The subset's density and openness is a future goal to prove (have a branch where it is almost finished), in pursuit of formalizing the proof of the Omitting Types Theorem via properties of Baire spaces. - [ ] depends on: #32215 - [ ] depends on: #32546 t-logic merge-conflict new-contributor blocked-by-other-PR 160/1 Mathlib.lean,Mathlib/ModelTheory/Topology/Types.lean,Mathlib/ModelTheory/Types.lean,Mathlib/Tactic/Linter/DirectoryDependency.lean 4 8 ['NoneMore', 'anishrajeev', 'github-actions', 'mathlib-dependent-issues', 'mathlib4-merge-conflict-bot', 'tb65536'] nobody
122-18206
4 months ago
130-32030
130 days ago
10-38484
10 days
31092 FlAmmmmING
author:FlAmmmmING
 feat(Algebra/Group/ForwardDiff.lean): Add theorem `sum_shift_eq_fwdDiff_iter`. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra new-contributor delegated
label:t-algebra$
 17/1 Mathlib/Algebra/Group/ForwardDiff.lean 1 20 ['BeibeiX0', 'FlAmmmmING', 'Ruben-VandeVelde', 'dagurtomas', 'github-actions', 'jcommelin', 'mathlib-bors', 'mathlib4-merge-conflict-bot'] nobody
120-25706
4 months ago
120-25706
120 days ago
54-22055
54 days
34141 gululu996-ui
author:gululu996-ui
 feat(Combinatorics/SimpleGraph/Acyclic): finite trees have at least two degree-one vertices Add a lemma showing that a finite tree with at least two vertices has at least two vertices of degree 1. - Introduce a helper lemma `SimpleGraph.Connected.one_le_degree` for connected graphs on a nontrivial finite type. - Prove the leaf-count lower bound via the degree-sum identity and a counting argument. --- awaiting-author new-contributor t-combinatorics 72/2 Mathlib/Combinatorics/SimpleGraph/Acyclic.lean 1 9 ['IvanRenison', 'SnirBroshi', 'github-actions', 'vlad902'] nobody
120-21964
4 months ago
122-3400
122 days ago
1-23617
1 day
29953 slashbade
author:slashbade
 feat: add reap for experiment --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor 40/3 Cache/IO.lean,Mathlib/Tactic/Common.lean,Mathlib/Tactic/Linter/DirectoryDependency.lean,lake-manifest.json,lakefile.lean 5 3 ['github-actions', 'mathlib4-merge-conflict-bot'] nobody
115-14489
3 months ago
unknown
0-0
0 seconds
31377 CoolRmal
author:CoolRmal
 feat: a series of smooth functions that converges (locally) uniformly is smooth The main theorem is the proof that an infinite sum of $C^n$ functions on a one-dimensional domain which converges locally uniformly is $C^n$ and related results. This should be compared with [contDiff_tsum](https://leanprover-community.github.io/mathlib4_docs/Mathlib/Analysis/Calculus/SmoothSeries.html#contDiff_tsum) where the same result is proved for functions on an arbitrary domain but with a slightly stronger convergence assumption. The main motivation for this PR is the [#mathlib4 > Tychonov's Counterexample for the Heat Equation](https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/Tychonov's.20Counterexample.20for.20the.20Heat.20Equation/with/547367912). --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-topology new-contributor awaiting-author merge-conflict 110/18 Mathlib/Analysis/Calculus/SmoothSeries.lean,Mathlib/Analysis/SpecialFunctions/Trigonometric/Cotangent.lean,Mathlib/NumberTheory/ModularForms/EisensteinSeries/QExpansion.lean,Mathlib/Topology/Algebra/InfiniteSum/TsumUniformlyOn.lean,Mathlib/Topology/Algebra/InfiniteSum/UniformOn.lean 5 20 ['CoolRmal', 'github-actions', 'mathlib4-merge-conflict-bot', 'ocfnash', 'sgouezel'] ocfnash
assignee:ocfnash
114-4062
3 months ago
175-21027
175 days ago
8-14942
8 days
33031 chiyunhsu
author:chiyunhsu
 feat(Combinatorics/Enumerative/Partition): add combinatorial proof of Euler's partition theorem The new file EulerComb.lean contains the combinatorial proof of Euler's partition theorem. The analytic proof of the theorem and its generalization of Glaisher's Theorem has already been formalized in [Glaisher.lean](https://github.com/leanprover-community/mathlib4/blob/master/Mathlib/Combinatorics/Enumerative/Partition/Glaisher.lean). The generalization of the combinatorial proof from this file to Glaisher's Theorem is within reach. --- Zulip discussion: [#mathlib4 > Glaisher’s Bijection on integer partitions](https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/Glaisher.E2.80.99s.20Bijection.20on.20integer.20partitions/with/570808111) [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-combinatorics new-contributor awaiting-zulip awaiting-author 531/0 Mathlib.lean,Mathlib/Combinatorics/Enumerative/Partition/EulerComb.lean 2 7 ['chiyunhsu', 'dagurtomas', 'github-actions', 'tb65536', 'vihdzp'] b-mehta
assignee:b-mehta
113-27583
3 months ago
113-27583
113 days ago
42-21618
42 days
33817 FlAmmmmING
author:FlAmmmmING
 fix(Combinatorics/Enumerative/Schroder): fix the definition of `smallSchroder` In the previous definition, the small Schröder numbers were defined as ```LaTeX s_0 = 1, s_1 = 1, s_2 = 1, s_3 = 3... ``` , which does not match the sequence listed in OEIS A006318. Moreover, this definition makes it difficult to correctly write the generating function for the small Schröder numbers. This PR fixes this issue. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor t-combinatorics large-import awaiting-author 61/39 Mathlib/Combinatorics/Enumerative/Schroder.lean 1 20 ['FlAmmmmING', 'YaelDillies', 'github-actions', 'vihdzp'] YaelDillies
assignee:YaelDillies
112-75677
3 months ago
57-58298
57 days ago
74-53798
74 days
34130 FlAmmmmING
author:FlAmmmmING
 feat(Combinatorics/SimpleGraph/Acyclic): Add new theorem `isTree_iff_uniqueShortest_path` --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) awaiting-author t-combinatorics new-contributor 28/1 Mathlib/Combinatorics/SimpleGraph/Acyclic.lean 1 9 ['IvanRenison', 'github-actions', 'metakunt', 'vlad902'] nobody
112-49990
3 months ago
121-34005
121 days ago
2-6389
2 days
34487 martinwintermath
author:martinwintermath
 feat(LinearAlgebra/SesquilinearForm): add instances for SeparatingLeft, SeparatingRight and Nondegenerate Add typeclass instances for `Fact B.SeparatingLeft`, `Fact B.SeparatingRight`, `Fact B.Nondegenerate`: * inferring `Fact B.flip.SeparatingLeft` from `Fact B.SeparatingRight` and vice versa * inferring `Fact B.SeparatingLeft` and `Fact B.SeparatingRight` from `Fact B.Nondegenerate` * inferring `Fact B.SeparatingLeft` and `Fact B.Nondegenerate` for `.id` and `Dual.eval` * inferring `Fact B.Nondegenerate` from `B.IsPerfPair` I also updated `PointedCone.dual_univ` to demonstrate the usefulness of these additions. Note that I needed to add an import to `Cone/Dual.lean` which somehow imports cardinals. So I needed to remove cardinals from `assert_not_exists`. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra new-contributor large-import merge-conflict
label:t-algebra$
 67/12 Mathlib/Geometry/Convex/Cone/Dual.lean,Mathlib/LinearAlgebra/Dual/Lemmas.lean,Mathlib/LinearAlgebra/PerfectPairing/Basic.lean,Mathlib/LinearAlgebra/SesquilinearForm/Basic.lean 2 4 ['github-actions', 'martinwintermath', 'mathlib-merge-conflicts', 'mathlib4-merge-conflict-bot'] joelriou
assignee:joelriou
112-36644
3 months ago
53-22981
53 days ago
13-75766
13 days
34028 floor-licker
author:floor-licker
 feat(SimpleGraph): add max-flow/min-cut weak duality This PR introduces a basic s–t flow setup for undirected SimpleGraphs and proves the standard weak-duality inequality: for any feasible flow f and any s–t cut S, value f ≤ cutCapacity S. This is a small, self-contained lemma I extracted while working on larger graph-theoretic formalizations, in particular, results that will ultimately rely on a full max-flow/min-cut theorem. The full MFMC equality/existence statement is not included here. This is the weak-duality direction (∀ f S, value f ≤ cutCapacity S). t-combinatorics new-contributor 169/0 Mathlib.lean,Mathlib/Combinatorics/SimpleGraph/Connectivity/MaxFlowMinCut.lean 2 14 ['SnirBroshi', 'floor-licker', 'github-actions', 'mathlib-merge-conflicts'] kmill
assignee:kmill
111-75684
3 months ago
63-12813
63 days ago
61-8543
61 days
32609 PrParadoxy
author:PrParadoxy
 feat(LinearAlgebra/PiTensorProduct): Relation between nested tensor products and tensor products indexed by dependent sums Product tensors in `⨂ j : (Σ i, β i), s j.fst j.snd` can be mapped to product tensors in `⨂ i, ⨂ b : β i, s i b`. If the outer index type is finite, the two types are equivalent. This allows the definition of endomorphisms on PiTensorProducts by specifying them on disjoint subsets of the index set. Such constructions are common e.g. in quantum circuits, quantum cellular automata, and renormalization procedures. --- WIP. This PR contains two "requests for comments". Essentially: * Is a single complex-to-define linear equivalence preferable over several less complex ones, which might however be of limited interest by themselves? * Which trade-offs are appropriate to make things computable? - [ ] depends on: #32608 - [x] depends on: #32600 - [x] depends on: #32598 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor blocked-by-other-PR merge-conflict t-algebra
label:t-algebra$
 683/0 Mathlib.lean,Mathlib/Data/Sigma/Basic.lean,Mathlib/LinearAlgebra/Multilinear/Basic.lean,Mathlib/LinearAlgebra/PiTensorProduct/Nested.lean,Mathlib/LinearAlgebra/PiTensorProduct/Set.lean 5 5 ['github-actions', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
111-1395
3 months ago
165-1833
165 days ago
0-2004
33 minutes
30260 imbrem
author:imbrem
 feat(CategoryTheory/Monoidal): added CocartesianMonoidalCategory As discussed in #21603 and #28718; this implements chosen finite coproducts on top of `AddMonoidalCategory` as defined in #30150 --- - [ ] depends on: #30150 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict blocked-by-other-PR large-import new-contributor t-category-theory 839/125 Mathlib.lean,Mathlib/CategoryTheory/Monoidal/Category.lean,Mathlib/CategoryTheory/Monoidal/Cocartesian/Basic.lean,Mathlib/CategoryTheory/Monoidal/Discrete.lean,Mathlib/Tactic/ToAdditive/GuessName.lean 5 4 ['github-actions', 'imbrem', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
110-40226
3 months ago
228-77195
228 days ago
0-1234
20 minutes
30258 imbrem
author:imbrem
 feat(CategoryTheory/Monoidal): to_additive for proofs using `monoidal` Building on #30150, this allows us to use `@[to_additive]` on proofs containing `monoidal`, by tagging the lemmas `monoidal` outputs with `@[to_additive]` as appropriate. Testing on my branch [`additive-monoidal-coherence`](https://github.com/imbrem/mathlib4/tree/additive-monoidal-coherence) shows that this works. It is still future work to have either the `monoidal` tactic or a new `add_monoidal` tactic work for `AddMonoidalCategory` instances directly. --- - [ ] depends on: #30150 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict blocked-by-other-PR large-import new-contributor t-category-theory 524/140 Mathlib/CategoryTheory/Monoidal/Category.lean,Mathlib/CategoryTheory/Monoidal/Discrete.lean,Mathlib/Tactic/CategoryTheory/Monoidal/Normalize.lean,Mathlib/Tactic/CategoryTheory/Monoidal/PureCoherence.lean,Mathlib/Tactic/CategoryTheory/MonoidalComp.lean,Mathlib/Tactic/ToAdditive/GuessName.lean 6 3 ['github-actions', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
110-40219
3 months ago
228-82848
228 days ago
0-241
4 minutes
32742 LTolDe
author:LTolDe
 feat(MeasureTheory/Constructions/Polish/Basic): add class SuslinSpace add new class `SuslinSpace` for a topological space that is an analytic set in itself This will be useful to prove the **Effros Theorem**, see [zulip thread](https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/Effros.20Theorem/with/558712441). --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor awaiting-zulip t-measure-probability awaiting-author 4/0 Mathlib/MeasureTheory/Constructions/Polish/Basic.lean 1 10 ['ADedecker', 'LTolDe', 'dagurtomas', 'dupuisf', 'github-actions', 'jcommelin'] PatrickMassot
assignee:PatrickMassot
110-39993
3 months ago
136-24125
136 days ago
25-76907
25 days
30121 idontgetoutmuch
author:idontgetoutmuch
 feat(Mathlib/Geometry/Manifold): principal fiber bundle core A structure capturing what it means to be a principal fibre bundle. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) awaiting-author t-differential-geometry new-contributor 227/0 Mathlib.lean,Mathlib/Geometry/Manifold/PrincipalFiberBundle/PrincipalGBundle.lean 2 8 ['github-actions', 'grunweg', 'idontgetoutmuch', 'mathlib4-merge-conflict-bot'] hrmacbeth
assignee:hrmacbeth
110-31934
3 months ago
207-23380
207 days ago
25-16284
25 days
31102 JOSHCLUNE
author:JOSHCLUNE
 feat: require LeanHammer Experimenting with adding LeanHammer as a mathlib dependency --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict new-contributor t-meta 61/4 Mathlib/Tactic/Common.lean,Mathlib/Tactic/Linter/DirectoryDependency.lean,MathlibTest/Hammer.lean,lake-manifest.json,lakefile.lean 5 2 ['github-actions', 'mathlib4-merge-conflict-bot'] nobody
110-30701
3 months ago
204-2840
204 days ago
0-6852
1 hour
33431 gululu996-ui
author:gululu996-ui
 feat(Combinatorics/SimpleGraph/Bipartite): characterize bipartite simple graphs by even cycles Add the classical characterization of bipartite simple graphs: a simple graph is bipartite if and only if every cycle has even length. Previously, mathlib has the definition of `IsBipartite` for `SimpleGraph` and various lemmas about bipartite graphs, but it does not provide this equivalence in a single theorem, so users have to reprove or reassemble it from existing results. Prove the forward direction by showing a 2-coloring alternates along any walk, so every cycle must have even length. Prove the converse by showing that if an odd cycle exists then no bipartition is possible, hence if all cycles are even the graph admits a bipartition. new-contributor t-combinatorics awaiting-author merge-conflict 186/1 Mathlib/Combinatorics/SimpleGraph/Bipartite.lean 1 6 ['NickAdfor', 'github-actions', 'jcommelin', 'mathlib-merge-conflicts'] kmill
assignee:kmill
110-30433
3 months ago
112-31330
112 days ago
26-3983
26 days
34007 martinwintermath
author:martinwintermath
 feat(Algebra/Module/Submodule/Dual): dual operator for submodules Add new file `Dual.lean` that defines the dual operator for submodules. The main definition is * `Submodule.dual`: given a bilinear pairing `p` between two modules `M₁` and `M₂` and a submodule `S` in `M₁`, `Submodule.dual p S` is the submodule in `M₂` consisting of all points `y` such that `0 = p x y` for all `x ∈ S`. For reasons of generality, `p` is actually a general sesqui-bilinear map, that is, of the form `p : M₁ →ₛₗ[I₁] M₂ →ₛₗ[I₂] M`. This implementation of the `dual` operator for submodules is written to parallel the implementation of `PointedCone.dual`. Include some additional results: * theorems that represent the dual as the kernel of a linear map * theorems for the relation between dual and the `dualAnnihilator` and `dualCoannihilator` of a submodule. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra new-contributor awaiting-author
label:t-algebra$
 236/0 Mathlib.lean,Mathlib/Algebra/Module/Submodule/Dual.lean 2 7 ['github-actions', 'joelriou', 'martinwintermath', 'mathlib-bors'] joelriou
assignee:joelriou
110-26470
3 months ago
112-8929
112 days ago
14-81283
14 days
34291 YellPika
author:YellPika
 feat(Data): a monad for partial computations This is the code corresponding to [mathlib4 > A monad for partial computations](https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/A.20monad.20for.20partial.20computations/with/569619800). Not currently intended to be merged. This PR depends on #33941. The only changes relevant to this discussion are in `OmegaPart.lean`, `OmegaProp.lean`, and `Quot.lean`. # Original Message Inspired by @**Aaron Liu**'s comments in #**mathlib4>deprecate Mathlib.Data.Nat.PartENat?@538009243** and #**Is there code for X?>Divergence monad@538020049** I made an attempt at constructing a monad for partial computations with a computable `OmegaCompletePartialOrder` instance (neither `Option` nor `Part` support this use case). My solution consists of three parts. **A computable version of `Quotient.choice`.** As mentioned in #**lean4>Quot.lift for dependent products@467436416** , the "obvious" computational interpretation of `Quotient.choice : (∀i:I, @Quotient (A i) …) → @Quotient (∀i:I, A i)` is not sound. However, we _can_ provide a sound computational interpretation when we restrict `I` to `ℕ`: ```lean unsafe def Quotient.countableChoice_impl {α : Nat → Type*} {S : ∀ i, Setoid (α i)} (f : ∀ i, Quotient (S i)) : @Quotient (∀ i, α i) (by infer_instance) := Quotient.lift₂ (fun z s ↦ ⟦fun | .zero => z | .succ n => s n⟧) (fun z₁ s₁ z₂ s₂ h₁ h₂ ↦ by apply sound rintro ⟨_|n⟩ · apply h₁ · apply h₂) (f 0) (countableChoice_impl (fun n ↦ f n.succ)) @[implemented_by Quotient.countableChoice_impl] def Quotient.countableChoice {α : Nat → Type*} {S : ∀ i, Setoid (α i)} (f : ∀ i, Quotient (S i)) : @Quotient (∀ i, α i) (by infer_instance) := Quotient.choice f ``` My justification for the soundness of this implementation comes from the fact that only uses existing (sound and computable) functions + general recursion. The implementation is found [here](https://github.com/YellPika/mathlib4/blob/99d38f164a97c7aa225283ef6016f0279419a994/Mathlib/Data/Quot.lean#L430) (it uses `unquot` instead of recursion for performance reasons, but should be equivalent). **A type of semi-computable propositions.** Next, I define a type of semi-computable propositions `ΩProp` as a quotient of the type of boolean sequences `(ℕ → Bool) / ≈`, where `p ≈ q ≝ (∃n, p n) ↔ (∃n, q n)`. A sequence is interpreted as "true" if at least one element in the sequence is `true`, and the quotient relation ensures that we cannot observe the difference between different "true" sequences. The `ΩProp` type has a (computable) `OmegaCompletePartialOrder`, and `Quotient.countableChoice` is used in the implementation of `ωSup`. The implementation of this type is [here](https://github.com/YellPika/mathlib4/blob/quot-choice-compute/Mathlib/Data/OmegaProp.lean). **A type of semi-computable computations.** Finally, I define the type `ΩPart A` of semi-computable computations returning a value of type `A`. The definition of `ΩPart` is the same as `Part` with `ΩProp` swapped for `Prop`. Again, `ΩPart A` has a (computable) `OmegaCompletePartialOrder` instance. The implementation can be found [here](https://github.com/YellPika/mathlib4/blob/quot-choice-compute/Mathlib/Data/OmegaPart.lean). This was mainly just a fun experiment and the code is not ready to be (or perhaps should not be) put in mathlib. I thought I should post it here to see if 1) there is any interest or 2) an implementation already exists that has escaped my notice. new-contributor large-import merge-conflict 1157/40 Mathlib/Data/OmegaPart.lean,Mathlib/Data/OmegaProp.lean,Mathlib/Data/Quot.lean,Mathlib/Order/OmegaCompletePartialOrder.lean,Mathlib/Order/ScottContinuity.lean 5 2 ['github-actions', 'mathlib-merge-conflicts'] nobody
108-8954
3 months ago
unknown
0-0
0 seconds
34053 christian-oudard
author:christian-oudard
 feat: Add error function (erf) and complementary error function (erfc) ## Summary I was doing some finance math and needed the Error Function, so I thought I'd contribute it. ### Main definitions * `Real.erf`: The error function, defined as `(2/√π) ∫₀ˣ e^(-t²) dt` * `Real.erfc`: The complementary error function, defined as `1 - erf x` ### Main results * `Real.erf_zero`: `erf 0 = 0` * `Real.erf_neg`: `erf` is an odd function: `erf (-x) = -erf x` * `Real.erf_tendsto_one`: `erf x → 1` as `x → ∞` * `Real.erf_tendsto_neg_one`: `erf x → -1` as `x → -∞` * `Real.erf_le_one`: `erf x ≤ 1` for all `x` * `Real.neg_one_le_erf`: `-1 ≤ erf x` for all `x` * `Real.deriv_erf`: `deriv erf x = (2/√π) * exp(-x²)` * `Real.differentiable_erf`: `erf` is differentiable * `Real.continuous_erf`: `erf` is continuous * `Real.strictMono_erf`: `erf` is strictly monotone Also adds `erf` to `docs/overview.yaml` under Special Functions. --- - [x] Builds successfully - [x] `lake exe runLinter` passes - [x] `lake exe mk_all --check` passes t-analysis new-contributor awaiting-author 333/0 Mathlib.lean,Mathlib/Analysis/SpecialFunctions/Erf.lean,docs/overview.yaml 3 18 ['SnirBroshi', 'christian-oudard', 'github-actions', 'j-loreaux', 'plp127'] j-loreaux
assignee:j-loreaux
107-68130
3 months ago
108-18583
108 days ago
14-69133
14 days
33601 nielstron
author:nielstron
 feat(Computability/ContextFreeGrammar): Concatenation of CFGs is CFG --- - [ ] depends on: #33599 - [ ] depends on: #33592 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-computability new-contributor blocked-by-other-PR 941/0 Mathlib/Computability/ContextFreeGrammar.lean 1 2 ['github-actions', 'mathlib4-dependent-issues-bot'] nobody
107-45843
3 months ago
137-29706
137 days ago
0-412
6 minutes
34726 GrigorenkoPV
author:GrigorenkoPV
 feat(Analysis/SpecialFunctions/Trigonometric/Basic): sin and cos of multiples of π / 3 --- Merge of https://github.com/leanprover-community/mathlib4/pull/26349 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor 159/0 Mathlib/Algebra/Order/Monoid/NatCast.lean,Mathlib/Analysis/SpecialFunctions/Trigonometric/Basic.lean,Mathlib/Data/Nat/Cast/Defs.lean,MathlibTest/trigonometry.lean 4 1 ['github-actions'] nobody
106-4868
3 months ago
106-4868
106 days ago
3-20994
3 days
34394 Citronhat
author:Citronhat
 feat(Algebra/Order/Ring): add constructors for linear ordered rings Add constructors for ordered rings from `mul_nonneg` / `mul_pos` that derive `ZeroLEOneClass` from a linear order. new-contributor t-algebra awaiting-author
label:t-algebra$
 31/14 Mathlib/Algebra/Order/Ring/Defs.lean,Mathlib/RingTheory/HahnSeries/Lex.lean 2 6 ['Citronhat', 'Vierkantor', 'github-actions', 'leanprover-radar'] Vierkantor
assignee:Vierkantor
105-38205
3 months ago
105-38205
105 days ago
12-25418
12 days
33493 michelsol
author:michelsol
 feat(RingTheory/Polynomial): An explicit formula for the Chebyshev polynomials of the first kind Adds the following explicit formula on the Chebyshev polynomial of the first kind of order n. ${ T_{n}(x)\ =\ \sum \limits _{k=0}^{\lfloor {\frac {n}{2}}\rfloor } {\binom {n}{2k}} \left(\ X^{2}-1\ \right)^{k}\ X^{n-2k}}$ This explicit formula can be found [here](https://en.wikipedia.org/wiki/Chebyshev_polynomials#Explicit_expressions). There is a proof using complex numbers but it only works if the ring R = ℂ. The proof here is by induction and works in a commutative ring R. Mathlib seems to extend the definition of Chebyshev polynomials for $n \in \mathbb{Z}$ but this would make the formula more cumbersome with `n.natAbs` in place of `n`'s, so I expressed it on `n : ℕ` directly. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-ring-theory new-contributor awaiting-author 51/1 Mathlib/RingTheory/Polynomial/Chebyshev.lean 1 8 ['YuvalFilmus', 'erdOne', 'github-actions', 'metakunt', 'michelsol'] chrisflav
assignee:chrisflav
103-74444
3 months ago
103-74444
103 days ago
35-16105
35 days
34815 Deep0Thinking
author:Deep0Thinking
 feat(Analysis/SpecialFunctions/ImproperIntegrals): Frullani integral - [x] depends on: #34966 --- Add a proof of **Frullani integral**. Main theorems: - `Frullani.integral_Ioi` - `IntegrableOn.tendsto_integral_Ioi` - `exists_integral_div_eq_mul_log` Supporting lemmas: - `Frullani.comp_mul_left_div` - `Frullani.intervalIntegrable_div` - `Frullani.exists_integral_div_eq_mul_log` - `Ioi_diff_Ioc` - `ContinuousOn.comp_mul_left_div`, `ContinuousOn.comp_mul_right_div` - `ContinuousOn.comp_mul_left`, `ContinuousOn.comp_mul_right` --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor large-import t-analysis awaiting-author blocked-by-other-PR 270/2 Mathlib/Analysis/SpecialFunctions/ImproperIntegrals.lean,Mathlib/MeasureTheory/Integral/IntervalIntegral/MeanValue.lean,Mathlib/Topology/Algebra/GroupWithZero.lean,Mathlib/Topology/Algebra/Monoid.lean 6 17 ['CoolRmal', 'Deep0Thinking', 'github-actions', 'mathlib-dependent-issues', 'mathlib-merge-conflicts', 'sgouezel'] urkud
assignee:urkud
103-58159
3 months ago
27-8209
27 days ago
11-36072
11 days
26986 WangYiran01
author:WangYiran01
 feat(Partition): add bijection for partitions with max part ≤ r This PR adds a new theorem `partition_max_equals_bound` to `Mathlib.Combinatorics.Enumerative.Partition`. It constructs a bijection between: - The set of partitions of `n` in which `r ∈ π.parts` and all parts are `≤ r`, and - The set of partitions of `n - r` whose largest part is at most `r`. This provides a constructive proof via removing/adding `r` from/to the partition multiset, in line with classical enumerative combinatorics. Contributed by Yiran Wang. awaiting-author t-combinatorics new-contributor merge-conflict 92/0 Mathlib/Combinatorics/Enumerative/Partition/Basic.lean,Mathlib/Data/Multiset/Lattice.lean 2 20 ['WangYiran01', 'github-actions', 'jcommelin', 'kckennylau', 'kim-em', 'mathlib-merge-conflicts', 'mathlib4-merge-conflict-bot'] b-mehta
assignee:b-mehta
101-22918
3 months ago
134-45786
134 days ago
120-67067
120 days
26168 oliver-butterley
author:oliver-butterley
 feat(MeasureTheory.VectorMeasure): variation defined as a supremum is equal to variation defined using the Hahn-Jordan decomposition Add `signedMeasure_totalVariation_eq`: if `μ` is a `SignedMeasure` then variation defined as a supremum is equal to variation defined using the Hahn-Jordan decomposition. Co-authored-by: @yoh-tanimoto --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-measure-probability awaiting-author merge-conflict blocked-by-other-PR new-contributor 916/0 Mathlib.lean,Mathlib/MeasureTheory/VectorMeasure/Decomposition/Jordan.lean,Mathlib/MeasureTheory/VectorMeasure/Variation/Equiv.lean 5 7 ['github-actions', 'mathlib-merge-conflicts', 'mathlib4-merge-conflict-bot', 'yoh-tanimoto'] nobody
101-3907
3 months ago
321-46174
321 days ago
15-65390
15 days
34722 GrigorenkoPV
author:GrigorenkoPV
 feat(Data/Finset/RangeDistance): bound distance between elements of `Finset.range` --- Rebase of https://github.com/leanprover-community/mathlib4/pull/26347 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor t-data awaiting-author 34/0 Mathlib.lean,Mathlib/Algebra/Order/Group/Unbundled/Abs.lean,Mathlib/Data/Finset/RangeDistance.lean 3 7 ['GrigorenkoPV', 'Vierkantor', 'github-actions', 'joneugster', 'mathlib-splicebot', 'plp127'] pechersky
assignee:pechersky
100-75596
3 months ago
57-12958
57 days ago
52-18954
52 days
33969 goliath-klein
author:goliath-klein
 refactor(PiTensorProduct/{InjectiveNorm, ProjectiveNorm}): Currently, injectiveSeminorm = projectiveSeminorm **WIP / RFC!** Arguably, `injectiveSeminorm` should be re-defined in Mathlib. See #34137 and [Zulip](https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/injectiveSeminorm/with/568798261) for context. In this file, we collect some results about the current definition and a possible alternative. Contents: * A theorem `injectiveSeminorm_eq_projectiveSeminorm` formalizing the equality of the current definitions. However, I think it is unlikely that keeping the alternative characterization would be worth the effort. The interesting direction `(L2') ≤ (L1)` follows from `norm_eval_le_projectiveSeminorm` which is still present. The converse direction is [somewhat tautological](https://github.com/leanprover-community/mathlib4/pull/34137). A proof of `(L2) = (L1)` (probably requiring Hahn-Banach) might be more interesting. * A preliminary implementation of the injective seminorm as commonly understood. * Sufficient conditions for the multiplicativity property `‖⨂ m i‖_∧ = ∏ ‖m i‖` to hold. This implements a TBD item. --- Co-authored-by: Davood H. H. Tehrani [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) WIP t-analysis new-contributor large-import merge-conflict 774/387 Mathlib.lean,Mathlib/Analysis/Normed/Module/Dual.lean,Mathlib/Analysis/Normed/Module/HahnBanach.lean,Mathlib/Analysis/Normed/Module/PiTensorProduct/InjectiveSeminorm.lean,Mathlib/Analysis/Normed/Module/PiTensorProduct/LeastReasonable.lean,Mathlib/Analysis/Normed/Module/PiTensorProduct/ProjectiveSeminorm.lean,Mathlib/Analysis/Normed/Operator/Basic.lean,Mathlib/LinearAlgebra/PiTensorProduct.lean 8 3 ['github-actions', 'goliath-klein', 'mathlib-merge-conflicts'] nobody
100-6268
3 months ago
128-21372
128 days ago
0-23
23 seconds
33233 jazzits
author:jazzits
 feat(GroupTheory): add chosen group presentations and Tietze transformations (1) and (2) Defines a notion of group presentation for G compatible with Mathlib.GroupTheory.PresentedGroup: generators `ι → G` whose range generates G, and relators `rels : Set (FreeGroup ι)` whose normal closure equals the kernel of `FreeGroup ι →* G`. Provides the canonical map `PresentedGroup P.rels →* G` and equivalences showing `PresentedGroup P.rels ≃* G` and invariance under changing presentations. Also formalizes Tietze moves (1)–(2) as equivalences of PresentedGroups: adding/removing a relator that lies in the normal closure of the others. TODO: moves (3)–(4) (add/remove generator with a defining relation). No existing definitions are modified t-group-theory new-contributor awaiting-author 328/0 Mathlib.lean,Mathlib/GroupTheory/Presentation.lean 2 15 ['github-actions', 'homeowmorphism', 'jazzits', 'kbuzzard', 'mathlib-merge-conflicts', 'plp127', 'tb65536'] tb65536
assignee:tb65536
99-34801
3 months ago
144-27348
144 days ago
5-47944
5 days
34725 GrigorenkoPV
author:GrigorenkoPV
 feat(RingTheory/RootsOfUnity/LowDegree): quadratic, cubic, quartic, quintic roots of unity Closes https://github.com/leanprover-community/mathlib4/pull/25907 --- Merge of https://github.com/leanprover-community/mathlib4/pull/25907 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor t-ring-theory awaiting-author 247/0 Mathlib.lean,Mathlib/Algebra/CharP/Invertible.lean,Mathlib/Algebra/QuadraticDiscriminant.lean,Mathlib/RingTheory/RootsOfUnity/LowDegree.lean 4 22 ['GrigorenkoPV', 'LLaurance', 'erdOne', 'github-actions', 'joneugster'] nobody
98-85891
3 months ago
103-75211
103 days ago
5-38408
5 days
33032 ksenono
author:ksenono
 feat(Combinatorics/SimpleGraph): Konig’s theorem on bipartite graphs --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-combinatorics new-contributor blocked-by-other-PR merge-conflict 832/251 Mathlib.lean,Mathlib/Combinatorics/SimpleGraph/Bipartite.lean,Mathlib/Combinatorics/SimpleGraph/Clique.lean,Mathlib/Combinatorics/SimpleGraph/DegreeSum.lean,Mathlib/Combinatorics/SimpleGraph/Konig/Auxillary.lean,Mathlib/Combinatorics/SimpleGraph/Konig/Konig.lean,Mathlib/Combinatorics/SimpleGraph/Konig/KonigFin.lean,Mathlib/Combinatorics/SimpleGraph/Matching.lean,Mathlib/Combinatorics/SimpleGraph/Subgraph.lean,Mathlib/Combinatorics/SimpleGraph/VertexCover.lean,Mathlib/SetTheory/Cardinal/Arithmetic.lean,Mathlib/SetTheory/Cardinal/Basic.lean 12 9 ['SnirBroshi', 'github-actions', 'ksenono', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot', 'vlad902'] nobody
98-69801
3 months ago
155-52457
155 days ago
0-136
2 minutes
34159 wangying11123
author:wangying11123
 feat(Geometry/Euclidean/Similarity): Add Triangle similarity on oangle Add theorems about triangles similarity on oangle t-euclidean-geometry new-contributor awaiting-author 154/1 Mathlib/Geometry/Euclidean/Similarity.lean 1 8 ['LLaurance', 'github-actions', 'jsm28', 'wangying11123'] jsm28
assignee:jsm28
98-33568
3 months ago
98-80797
98 days ago
7-49555
7 days
33050 mkaratarakis
author:mkaratarakis
 feat: lemmas for the analytic part of the proof of the Gelfond–Schneider theorem Lemmas missing for the formalisation of the proof of the Gelfond–Schneider theorem --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-number-theory new-contributor WIP 238/0 Mathlib.lean,Mathlib/Analysis/Analytic/Basic.lean,Mathlib/Analysis/Analytic/Order.lean,Mathlib/Analysis/Complex/CauchyIntegral.lean,Mathlib/NumberTheory/Transcendental/AnalyticPart.lean,Mathlib/NumberTheory/Transcendental/AnalyticPart2.lean 6 113 ['SnirBroshi', 'github-actions', 'j-loreaux', 'mkaratarakis', 'riccardobrasca', 'vihdzp'] riccardobrasca
assignee:riccardobrasca
97-15948
3 months ago
107-35205
107 days ago
6-26337
6 days
34814 GrigorenkoPV
author:GrigorenkoPV
 feat(Tactic/ClearUnneeded): add `clear_unneeded` tactic --- The simplest version suggested in https://github.com/leanprover-community/mathlib4/issues/25319 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-meta new-contributor please-merge-master awaiting-author 94/0 Mathlib.lean,Mathlib/Tactic.lean,Mathlib/Tactic/ClearUnneeded.lean,Mathlib/Tactic/Common.lean,MathlibTest/ClearUnneeded.lean,scripts/noshake.json 6 12 ['BoltonBailey', 'GrigorenkoPV', 'github-actions', 'joneugster'] joneugster
assignee:joneugster
97-3012
3 months ago
105-26385
105 days ago
2-23785
2 days
34876 GrigorenkoPV
author:GrigorenkoPV
 feat(Tactic/AssumptionQuestion): add `assumption?` tactic --- As requested in #10361 TODO: maybe add some tests? [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-meta new-contributor awaiting-author 85/0 Mathlib.lean,Mathlib/Tactic.lean,Mathlib/Tactic/AssumptionQuestion.lean,Mathlib/Tactic/Common.lean,MathlibTest/AssumptionQuestion.lean,scripts/noshake.json 6 5 ['GrigorenkoPV', 'SnirBroshi', 'github-actions', 'joneugster'] joneugster
assignee:joneugster
97-1587
3 months ago
105-24575
105 days ago
0-83167
23 hours
33217 Blackfeather007
author:Blackfeather007
 feat(Algebra): define associated graded structure for abelian group In this PR we define the associated graded structure for abelian group when given a filtration and only give some basic lemmas about it. --- migrated from https://github.com/leanprover-community/mathlib4/pull/26857 new-contributor t-ring-theory awaiting-author 144/0 Mathlib.lean,Mathlib/RingTheory/FilteredAlgebra/AssociatedGraded.lean 2 13 ['Blackfeather007', 'chrisflav', 'erdOne', 'eric-wieser', 'github-actions', 'urkud'] erdOne
assignee:erdOne
96-75568
3 months ago
146-3564
146 days ago
4-58698
4 days
23791 SEU-Prime
author:SEU-Prime
 Create AmiceTrans.lean --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict WIP t-number-theory new-contributor 2963/0 Mathlib.lean,Mathlib/Analysis/Normed/Ring/Lemmas2.lean,Mathlib/NumberTheory/Padics/AmiceTrans.lean,Mathlib/NumberTheory/Padics/PSAC.lean,Mathlib/NumberTheory/Padics/PSAC2.lean,Mathlib/NumberTheory/Padics/PSAC3.lean,Mathlib/NumberTheory/Padics/PiGammainPS.lean,Mathlib/NumberTheory/Padics/PsiandVar.lean,Mathlib/RingTheory/AdicCompletion/Lemma.lean,Mathlib/RingTheory/PowerSeries/Comp.lean,Mathlib/Topology/ContinuousMap/ZeroAtBot.lean 11 5 ['SEU-Prime', 'github-actions', 'leanprover-community-bot-assistant', 'urkud'] nobody
96-74632
3 months ago
410-20898
410 days ago
0-38
38 seconds
33281 michelsol
author:michelsol
 feat(Analysis/SpecialFunctions/Integrals): integral of 1/sqrt(1-x^2) and its integrability. Add the integral of the derivative of arcsin and its integrability. --- - [ ] depends on: #33280 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor merge-conflict t-analysis 59/0 Mathlib/Analysis/SpecialFunctions/Integrability/Basic.lean,Mathlib/Analysis/SpecialFunctions/Integrals/Basic.lean,Mathlib/MeasureTheory/Integral/IntervalIntegral/FundThmCalculus.lean 3 3 ['github-actions', 'mathlib-dependent-issues', 'mathlib4-merge-conflict-bot'] nobody
96-44255
3 months ago
148-12080
148 days ago
0-2872
47 minutes
29777 yuanyi-350
author:yuanyi-350
 feat(Functional Analysis): closed Range Theorem - [ ] depends on: #29151 [Corollary of Hahn-Banach theorem] - [ ] depends on: #29776 [refactor ContinuousLinearMap.isOpenMap by separating it into sublemmas] --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) WIP blocked-by-other-PR new-contributor awaiting-author t-analysis merge-conflict 237/25 Mathlib/Analysis/LocallyConvex/Separation.lean,Mathlib/Analysis/Normed/Operator/Banach.lean,Mathlib/Analysis/Normed/Operator/ClosedRange.lean,Mathlib/Analysis/RCLike/Lemmas.lean,Mathlib/Topology/Order/OrderClosed.lean 5 5 ['github-actions', 'mathlib-merge-conflicts', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] faenuccio
assignee:faenuccio
96-13440
3 months ago
246-25216
246 days ago
0-634
10 minutes
29151 yuanyi-350
author:yuanyi-350
 feat: Corollary of Hahn–Banach theorem In this PR, I have proved [Rudin, *Functional Analysis* (Theorem 3.7)][rudin1991] which is a step in proving the Closed Range Theorem. Also, I have added tags for the corresponding theorems in Rudin to mathlib. 3.7 Theorem. Suppose B is a convex, balanced, closed set in a locally convex space $X, x_0 \in X$, but $x_0 \notin B$. Then there exists $\Lambda \in X^*$ such that $|\Lambda x| \leq 1$ for all $x \in B$, but $\Lambda x_0>1$ proof. Since $B$ is closed and convex, we can apply (b) of Theorem 3.4, with $A=\{ x_0 \}$ , to obtain $\Lambda_1 \in X^*$ such that $\Lambda_1 x_0=r e^{i \theta}$ lies outside the closure $K$ of $\Lambda_1(B)$. Since $B$ is balanced, so is $K$. Hence there exists $s, 0 List.Vector.* - ... Deletions: - Nat.bit1_add_bit1 - ... Any other comments you want to keep out of the PR commit should go below the `---`, and placed outside this HTML comment, or else they will be invisible to reviewers. If this PR depends on other PRs, please list them below this comment, using the following format: - [ ] depends on: #xyz [optional extra text] --> [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) awaiting-author new-contributor large-import t-analysis merge-conflict 70/1 Mathlib/Analysis/LocallyConvex/Separation.lean,Mathlib/Analysis/RCLike/Lemmas.lean,Mathlib/Topology/Order/OrderClosed.lean 3 17 ['faenuccio', 'fpvandoorn', 'github-actions', 'mathlib-merge-conflicts', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot', 'mcdoll', 'themathqueen', 'yuanyi-350'] faenuccio
assignee:faenuccio
96-9063
3 months ago
243-42891
243 days ago
20-68757
20 days
32918 michelsol
author:michelsol
 feat: define `supEdist` and `supDist` Create a new file Topology.MetricSpace.SupDistance and define the supremal distance in (extended) metric spaces. The defined `supEdist` and `supDist` will have similar theory to the already existing `infEdist` and `infDist`. The motivation is to be able to define the radius of a minimal bounding sphere as the infimum of the supDist later. [zulip discussion here](https://leanprover.zulipchat.com/#narrow/channel/116395-maths/topic/Formalizing.20Jung's.20theorem.20and.20minimal.20bounding.20spheres) t-topology new-contributor merge-conflict 75/0 Mathlib.lean,Mathlib/Topology/MetricSpace/SupDistance.lean 2 5 ['github-actions', 'mathlib4-merge-conflict-bot', 'michelsol', 'urkud'] nobody
95-14354
3 months ago
137-6739
137 days ago
21-3598
21 days
26413 michaellee94
author:michaellee94
 feat: existence of maximal solutions for ODEs meeting Picard-Lindelöf conditions Add existence proof for maximal solution of ODE using Picard-Lindelöf and a uniqueness theorem using Grönwall's lemma. --- - [x] depends on: #26382 - [x] depends on: #29186 - [ ] depends on: #35043 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) blocked-by-other-PR new-contributor t-analysis merge-conflict 1300/431 Mathlib.lean,Mathlib/Analysis/ODE/Basic.lean,Mathlib/Analysis/ODE/ExistUnique.lean,Mathlib/Analysis/ODE/Gronwall.lean,Mathlib/Analysis/ODE/MaximalSolution.lean,Mathlib/Analysis/ODE/PicardLindelof.lean,Mathlib/Analysis/ODE/Transform.lean,Mathlib/Geometry/Manifold/IntegralCurve/Basic.lean,Mathlib/Geometry/Manifold/IntegralCurve/ExistUnique.lean,Mathlib/Geometry/Manifold/IntegralCurve/Transform.lean,Mathlib/Geometry/Manifold/IntegralCurve/UniformTime.lean,docs/1000.yaml,docs/undergrad.yaml 13 95 ['botbaki-review', 'github-actions', 'grunweg', 'leanprover-community-bot-assistant', 'mathlib-merge-conflicts', 'mathlib4-dependent-issues-bot', 'michaellee94', 'winstonyin'] nobody
94-41889
3 months ago
326-27675
326 days ago
0-5139
1 hour
33712 wangying11123
author:wangying11123
 feat(Geometry/Euclidean/Angle/Unoriented/Projection): Add sameray_orthogonalProjection_vsub_of_angle_lt Add sameray_orthogonalProjection_vsub_of_angle_lt `sameray_orthogonalProjection_vsub_of_angle_lt` When an angle is acute, the vector to the orthogonal projection lies in the same ray as the given direction vector. new-contributor t-euclidean-geometry awaiting-author 20/0 Mathlib/Geometry/Euclidean/Angle/Unoriented/Projection.lean 1 4 ['JovanGerb', 'github-actions', 'j-loreaux'] JovanGerb
assignee:JovanGerb
94-24185
3 months ago
94-24285
94 days ago
39-6778
39 days
30667 FrederickPu
author:FrederickPu
 feat(‎Mathlib/Algebra/Group/Subgroup/Pointwise): subgroup mul Title: feat: pointwise products for subgroups Description: showed the point-wise product of disjoint subgroups is equivalent to their Cartesian product. Based on https://leanprover.zulipchat.com/#narrow/channel/113488-general/topic/useful.20group.20theory.20lemmas/with/546738566. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra new-contributor
label:t-algebra$
 28/0 Mathlib/Algebra/Group/Subgroup/Pointwise.lean 1 23 ['FrederickPu', 'eric-wieser', 'github-actions', 'plp127', 'tb65536'] nobody
94-22694
3 months ago
94-27328
94 days ago
1-21290
1 day
33793 LTolDe
author:LTolDe
 feat(MeasureTheory/Constructions/Polish/Basic): add lemma AnalyticSet.inter_nonempty_of_nowhereMeagre add lemma AnalyticSet.inter_nonempty_of_nowhereMeagre, the main ingredient for the proof of the **Effros' Theorem**, see [#mathlib4 > Effros Theorem](https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/Effros.20Theorem/with/566543328) introduce definition of a nowhere meagre set --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-measure-probability new-contributor awaiting-author 37/0 Mathlib/MeasureTheory/Constructions/Polish/Basic.lean,Mathlib/Order/Filter/Basic.lean,Mathlib/Topology/GDelta/Basic.lean 3 8 ['MichaelStollBayreuth', 'erdOne', 'github-actions', 'j-loreaux'] kex-y
assignee:kex-y
94-18451
3 months ago
94-18657
94 days ago
39-9555
39 days
35313 LexinonCraft
author:LexinonCraft
 feat: IMO 2025 Q4 This adds a solution for problem 4 from the International Math Olympiad 2025. --- IMO new-contributor awaiting-author 631/0 Archive.lean,Archive/Imo/Imo2025Q4.lean 2 4 ['LexinonCraft', 'github-actions', 'jsm28'] jsm28
assignee:jsm28
93-74725
3 months ago
93-74725
93 days ago
3-30421
3 days
33276 NicolaBernini
author:NicolaBernini
 feat: Rename List.reverse_perm to List.reverse_perm_self and List.reverse_perm' to List.reverse_perm_iff --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor awaiting-author t-data merge-conflict 17/15 Mathlib/Algebra/BigOperators/Group/List/Basic.lean,Mathlib/Data/Finset/Dedup.lean,Mathlib/Data/List/Basic.lean,Mathlib/Data/List/Defs.lean,Mathlib/Data/List/Perm/Lattice.lean,Mathlib/Data/List/Permutation.lean,Mathlib/Data/Multiset/Defs.lean,Mathlib/NumberTheory/Divisors.lean 8 5 ['Ruben-VandeVelde', 'github-actions', 'mathlib-merge-conflicts'] kim-em
assignee:kim-em
93-58469
3 months ago
144-36742
144 days ago
4-4467
4 days
34674 Citronhat
author:Citronhat
 feat(Algebra/Order/Ring): replace ENNReal lemmas with WithTop versions * Add `WithTop` versions of basic multiplicative order lemmas. * Use the new `WithTop` lemmas to replace `ENNReal` proofs and address six TODOs. * Fix a typo in the `pos_of_ne_zero` alias name. new-contributor t-algebra merge-conflict
label:t-algebra$
 46/15 Mathlib/Algebra/Order/Monoid/Canonical/Defs.lean,Mathlib/Algebra/Order/Ring/WithTop.lean,Mathlib/Data/ENNReal/Operations.lean 3 5 ['Citronhat', 'Ruben-VandeVelde', 'github-actions', 'mathlib-merge-conflicts'] Ruben-VandeVelde
assignee:Ruben-VandeVelde
93-38203
3 months ago
93-38204
93 days ago
17-1225
17 days
28246 Sebi-Kumar
author:Sebi-Kumar
 feat(AlgebraicTopology/FundamentalGroupoid): the n-sphere is simply connected for n > 1 Prove that the `n`-dimensional sphere (i.e., the unit sphere centered at the origin in `(n + 1)`-dimensional real Euclidean space) is a simply connected space for `n > 1`. This proof follows Hatcher's "Algebraic Topology"; we first prove a general lemma about decomposing loops and then exploit the fact that non-surjective loops in the sphere are homotopically trivial. Note: To get this file to build, I edited `Mathlib/Tactic/Linter/DirectoryDependency.lean` to remove the restrictions on AlgebraicTopology files importing Geometry, NumberTheory, and FieldTheory files. Thank you to those who shared their expertise [here](https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/Warning.20that.20AlgebraicTopology.20can't.20import.20SetTheory/with/533833638). As I understand it, this is just a short-term solution, so I would appreciate feedback on what to do about this situation. Note: I am unsure where exactly the file `SimplyConnectedSphere.lean` should go or whether that is an appropriate name for the file, so feedback there would be appreciated. --- To provide additional context, this code was written as a part of the Fields Undergraduate Summer Research Program at the University of Western Ontario under the supervision of Chris Kapulkin and Daniel Carranza. - [x] depends on: #28208 - [x] depends on: #28198 - [x] depends on: #28185 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebraic-topology new-contributor awaiting-author 343/3 Mathlib.lean,Mathlib/AlgebraicTopology/FundamentalGroupoid/SimplyConnectedSphere.lean,Mathlib/Tactic/Linter/DirectoryDependency.lean 3 17 ['dagurtomas', 'github-actions', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot', 'robin-carlier'] robin-carlier
assignee:robin-carlier
91-35989
3 months ago
91-35989
91 days ago
13-72199
13 days
33746 ster-oc
author:ster-oc
 feat(Algebra/Module/ZLattice): align `ZSpan.floor` to `Int.floor` API This PR adds some of the existent lemmas about `Int.floor`, `Int.ceil` and `Int.fract` to the `ZSpan` namespace. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra new-contributor merge-conflict
label:t-algebra$
 353/145 Mathlib/Algebra/Module/ZLattice/Basic.lean,Mathlib/Algebra/Order/Floor/Ring.lean,Mathlib/Topology/Algebra/Order/Floor.lean 3 8 ['github-actions', 'joelriou', 'mathlib-merge-conflicts', 'ster-oc'] joelriou
assignee:joelriou
88-55101
2 months ago
88-55101
88 days ago
30-23357
30 days
31766 SuccessMoses
author:SuccessMoses
 feat(Topology/EMetricSpace): continuity of arc length fixes half of #31751 --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor t-topology awaiting-author merge-conflict 396/0 Mathlib.lean,Mathlib/Topology/EMetricSpace/ArcLength.lean,Mathlib/Topology/EMetricSpace/BoundedVariation.lean 3 40 ['SnirBroshi', 'SuccessMoses', 'alreadydone', 'github-actions', 'grunweg', 'j-loreaux', 'mathlib-merge-conflicts'] nobody
88-398
2 months ago
164-1268
164 days ago
2-77113
2 days
33257 NickAdfor
author:NickAdfor
 feat(Combinatorics/SimpleGraph/Bipartite): Odd Cycle Theorem (A Solution to TODO) Prove bipartite iff all cycles are even This PR formalizes the classical graph theory theorem: a graph is bipartite if and only if all its cycles have even length. Co-authored-by: Nick Adfor Co-authored-by: Yue Sun Co-authored-by: Aristotle AI --- ## Main results - `SimpleGraph.bipartite_iff_all_cycles_even` : the main equivalence theorem ## Key supporting lemmas - `SimpleGraph.even_length_iff_same_color` : parity lemma for 2-colorings - `SimpleGraph.even_length_iff_even_bypass_length` : bypass length parity - `SimpleGraph.even_cycle_length_of_path` : cycle construction lemma - `SimpleGraph.bypass_eq_nil_of_closed` : closed path properties ## Proof outline 1. For bipartite graphs: use the 2-coloring to show that in a 2-coloring, a walk has even length iff its endpoints have the same color. 2. For cycles (start = end), this forces even length. 3. For the converse: if all cycles are even, construct a 2-coloring using the `two_colorable_iff_forall_loop_even` characterization. 4. Show this coloring is valid using bypass operations and path properties. ## Technical notes - Uses `SimpleGraph.Walk` for path/cycle representation - Handles both `IsPath` and `IsCycle` predicates - Uses bypass operations (`takeUntil`, `dropUntil`, `bypass`) to analyze walks - Requires `DecidableEq V` for some lemmas - Uses classical logic for case analysis ## Reviewer notes - The proof uses induction on walks and case analysis on colorings - Some lemmas (like `even_length_iff_same_color`) could be extracted to more general locations - All theorems are in the `SimpleGraph` namespace - The `bipartite_iff_all_cycles_even` theorem provides the complete characterization t-combinatorics new-contributor awaiting-author LLM-generated merge-conflict 164/8 Mathlib/Combinatorics/SimpleGraph/Bipartite.lean,Mathlib/Combinatorics/SimpleGraph/ConcreteColorings.lean 2 80 ['IvanRenison', 'NickAdfor', 'Rida-Hamadani', 'SnirBroshi', 'YaelDillies', 'euprunin', 'github-actions', 'kmill', 'mathlib-merge-conflicts', 'mitchell-horner', 'vihdzp', 'vlad902'] YaelDillies
assignee:YaelDillies
87-75772
2 months ago
59-48060
59 days ago
52-32521
52 days
34419 ster-oc
author:ster-oc
 feat(RCLike): add `Continuous.re` and similar This PR adds dot notation for `re`, `im`, `conj` and `ofReal` for `Continuous`, `LipschitzWith` and `Memℓp`. Given `hf : Continuous f` it allows to use `hf.re` to express `Continuous (fun x ↦ (f x).re)`, similarly to the usual `hf.add hg`. I also can add the same features for `Summable` but I am not sure where to place them, suggestions are appreciated! --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-analysis new-contributor awaiting-author merge-conflict 186/41 Mathlib/Analysis/Normed/Group/Uniform.lean,Mathlib/Analysis/Normed/Lp/lpSpace.lean,Mathlib/Analysis/RCLike/Basic.lean 3 15 ['github-actions', 'j-loreaux', 'mathlib-merge-conflicts', 'ster-oc'] j-loreaux
assignee:j-loreaux
87-12496
2 months ago
87-12496
87 days ago
8-29654
8 days
33247 sun123zxy
author:sun123zxy
 feat(Mathlib/RingTheory/Ideal/Cotangent): dimension of cotangent spaces It is shown that the span rank of the maximal ideal of a local ring equals the dimension of the cotangent space if the maximal ideal is finitely generated. To avoid unnecessary imports, the original `Mathlib/RingTheory/Nakayama` is now moved to `Mathlib/RingTheory/Nakayama/Basic`. --- - [ ] depends on: #33359 - [ ] depends on: #33361 - [ ] depends on: #35651 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) file-removed new-contributor t-ring-theory WIP blocked-by-other-PR merge-conflict 140/27 Mathlib.lean,Mathlib/RingTheory/Ideal/Cotangent.lean,Mathlib/RingTheory/Ideal/KrullsHeightTheorem.lean,Mathlib/RingTheory/Ideal/Quotient/Operations.lean,Mathlib/RingTheory/LocalRing/Module.lean,Mathlib/RingTheory/LocalRing/Quotient.lean,Mathlib/RingTheory/Nakayama/Basic.lean,Mathlib/RingTheory/Nakayama/SpanRank.lean,Mathlib/RingTheory/Regular/RegularSequence.lean,Mathlib/RingTheory/Support.lean 10 13 ['erdOne', 'github-actions', 'mathlib-bors', 'mathlib-merge-conflicts', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot', 'sun123zxy'] nobody
86-83134
2 months ago
146-3882
146 days ago
3-72713
3 days
34853 GrigorenkoPV
author:GrigorenkoPV
 feat(Combinatorics/Enumerative/Catalan): ratio of subsequent Catalan numbers --- Should I split this into 2 PRs? Otherwise it'll get squashed & be less concise. UPD: ok, I've opened #34854 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor merge-conflict 305/195 Mathlib.lean,Mathlib/Combinatorics/Enumerative/Catalan.lean,Mathlib/Combinatorics/Enumerative/Catalan/Basic.lean,Mathlib/Combinatorics/Enumerative/Catalan/Ratio.lean,Mathlib/Combinatorics/Enumerative/Catalan/Tree.lean,Mathlib/Combinatorics/Enumerative/DyckWord.lean,Mathlib/RingTheory/PowerSeries/Catalan.lean 7 6 ['github-actions', 'mathlib-merge-conflicts', 'vihdzp'] nobody
86-82757
2 months ago
105-24042
105 days ago
1-62439
1 day
35735 mkaratarakis
author:mkaratarakis
 feat(NumberTheory): analytical properties and lower bounds for Gelfond-Schneider auxiliary function This PR is the third component in the formalization of the Gelfond-Schneider Theorem (Hilbert's Seventh Problem). It connects the algebraically constructed auxiliary function `R(x)` to its analytical properties, establishing the exact order of vanishing and the fundamental lower bound on the norm of its non-zero derivative evaluation. Following the argument in Loo-Keng Hua's *Introduction to Number Theory* (Chapter 17.9, equations (4) and (5)), we define the minimal non-vanishing derivative order $r$ and scale the evaluation to an algebraic integer to compute its norm. 1. (`iteratedkDeriv_R_eq_zero` & `order_geq_n`): We verify that the coefficient vector $\eta$ (chosen via Siegel's lemma in the previous PR) forces the first $n$ derivatives of the auxiliary function $R(x)$ to vanish at the points $x \in \{1, 2, \dots, m\}$. Consequently, the analytical order of $R(x)$ at these points is at least $n$. 2. We extract $r$, the exact minimal order of vanishing of $R(x)$ among all points $1 \le l \le m$, and prove that $n \le r$. 3. We define the non-zero algebraic number $\rho = (\log \alpha)^{-r} R^{(r)}(l_0)$. 4. We prove the crucial textbook step that scaling $\rho$ by $c_1^{r+2mq}$ (formalized here as `cρ`) results in an algebraic integer in $\mathcal{O}_K$. 5. Because $c_1^{r+2mq} \rho$ is a non-zero algebraic integer, the absolute value of its norm is at least $1$. We use this to formally prove the strict lower bound on the absolute norm of the unscaled $\rho$: $|N(\rho)| > c_1^{-h(r+2mq)} > c_5^{-r}$. --- - [ ] depends on: #35734 [optional extra text] [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-number-theory new-contributor blocked-by-other-PR 1141/0 Mathlib.lean,Mathlib/NumberTheory/Transcendental/GelfondSchneider/MainAlg.lean,Mathlib/NumberTheory/Transcendental/GelfondSchneider/MainAlgSetup.lean,Mathlib/NumberTheory/Transcendental/GelfondSchneider/MainOrder.lean 4 3 ['github-actions', 'mathlib-dependent-issues'] nobody
86-70215
2 months ago
87-6271
87 days ago
0-362
6 minutes
35755 Vilin97
author:Vilin97
 feat(Analysis/ODE): forward Euler method convergence WIP Prove the convergence of the Forward Euler Method. This is the first theorem in most textbooks on numerical analysis for ODEs. --- The initial proof was produced by [Aristotle](https://aristotle.harmonic.fun). The code was then iteratively refined (factoring out lemmas, golfing, simplifying proofs) using Claude Code (Claude Opus 4.6). * [ ] depends on: #35753 new-contributor WIP LLM-generated merge-conflict 297/0 Mathlib.lean,Mathlib/Analysis/ODE/EulerMethod.lean,Mathlib/Topology/Algebra/Order/PiecewiseLinear.lean 4 7 ['Vilin97', 'eric-wieser', 'github-actions', 'mathlib-merge-conflicts'] nobody
86-47204
2 months ago
86-49415
86 days ago
0-674
11 minutes
20238 maemre
author:maemre
 feat(Computability/DFA): Closure of regular languages under some set operations This shows that regular languages are closed under complement and intersection by constructing DFAs for them. --- Closure under all other operations will be proved when someone adds the proof for DFA<->regular expression equivalence, so they are not part of this PR. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor t-computability merge-conflict awaiting-author awaiting-zulip 159/0 Mathlib/Computability/DFA.lean,Mathlib/Computability/Language.lean 2 60 ['EtienneC30', 'YaelDillies', 'github-actions', 'maemre', 'mathlib4-merge-conflict-bot', 'meithecatte', 'urkud'] nobody
85-45139
2 months ago
431-23078
431 days ago
48-67492
48 days
22361 rudynicolop
author:rudynicolop
 feat(Computability/NFA): nfa closure properties Add the closure properties union, intersection and reversal for NFA. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor t-computability merge-conflict awaiting-author awaiting-zulip 218/2 Mathlib/Computability/Language.lean,Mathlib/Computability/NFA.lean 2 91 ['EtienneC30', 'b-mehta', 'ctchou', 'github-actions', 'leanprover-community-bot-assistant', 'meithecatte', 'rudynicolop'] nobody
85-45123
2 months ago
382-27017
382 days ago
39-60525
39 days
30872 rudynicolop
author:rudynicolop
 feat(Computability/NFA): NFA closure under concatenation This PR proves that regular languages are closed under concatenation via a direct construction on `NFA`s without `εNFA` nor ε-transitions. The main new definitions and results include: - `M1.concat M2`, the concatenation of `NFA`s `M1` and `M2`, a direct construction without ε-transitions. - Theorem `accepts_concat : (M1.concat M2).accepts = M1.accepts * M2.accepts`, showing the correctness of the construction. - Theorem `IsRegular.mul`, showing that regular languages are closed under concatenation. --- - [x] depends on: #31038 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-computability new-contributor awaiting-author 104/7 Mathlib/Computability/NFA.lean 1 67 ['YaelDillies', 'ctchou', 'eric-wieser', 'github-actions', 'lambda-fairy', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot', 'rudynicolop'] nobody
85-24994
2 months ago
113-8403
113 days ago
59-63565
59 days
35746 ThomasMoulin-hub
author:ThomasMoulin-hub
 feat (Algebra/Endomorphisms): add kernels lemma from the missing undergraduate mathematics in mathlib Add helper theorem inside Mathlib.Algebra.Polynomial.Smeval.lean and created a new file Mathlib/RingTheory/Polynomial/KernelDecomposition.lean that implements the kernels lemma from the missing undergraduate mathematics in mathlib list. This file also contains intermediate results needed for the main lemma. new-contributor 75/0 Mathlib/Algebra/Polynomial/Smeval.lean,Mathlib/RingTheory/Polynomial/Basic.lean 2 2 ['github-actions'] nobody
84-82963
2 months ago
unknown
0-0
0 seconds
23929 meithecatte
author:meithecatte
 feat(Computability/NFA): improve bound on pumping lemma --- - [x] depends on: #25321 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-computability awaiting-zulip new-contributor awaiting-author 101/10 Mathlib/Computability/EpsilonNFA.lean,Mathlib/Computability/NFA.lean 2 42 ['YaelDillies', 'dagurtomas', 'github-actions', 'leanprover-community-bot-assistant', 'mathlib4-dependent-issues-bot', 'meithecatte'] nobody
84-65152
2 months ago
349-8051
349 days ago
34-10092
34 days
35128 DAE123456
author:DAE123456
 feat : Define anti_pascal --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra new-contributor awaiting-author
label:t-algebra$
 81/0 Archive.lean,Archive/Imo/Imo2018Q3.lean 2 5 ['DAE123456', 'github-actions', 'grunweg', 'vihdzp'] nobody
84-62678
2 months ago
100-30842
100 days ago
0-1613
26 minutes
8102 miguelmarco
author:miguelmarco
 feat(Tactic): add `unify_denoms` and `collect_signs` tactics This PR adds four new tactics: - `unify_denoms` tries to put expressions with several divisions in a form with only one division. In the case of fields, it works similarly to `field_simp`, but if the hypothesis about denominators being nonzero are not present, it assumes them, and leaves them as new goals to prove. In that sense, it is an "unsafe" tactic (but can be useful nevertheless, for example when you can't find which exact hypothesis is missing). It also works with expressions of naturals and Euclidean domains, assuming the corresponding hypothesis about the denominators dividing the numerators. - `unify_denoms!` extends `unify_denoms` to work with (in)equalities, assuming also that the denominators, once in normal form, are positive. - `collect_signs` works similarly with expressions using sums and substractions: it tries to put them in a form of one sum minus other sum. In the case of working with naturals, it assumes that we never substract a bigger number from a smaller one. Both are implemented essentially as a macro that combines several rewriting rules. Some new lemmas with the corresponding rules are added. --- please-adopt new-contributor merge-conflict modifies-tactic-syntax good first issue t-meta 407/0 Mathlib.lean,Mathlib/Algebra/EuclideanDomain/Basic.lean,Mathlib/Tactic.lean,Mathlib/Tactic/CollectSigns.lean,Mathlib/Tactic/UnifyDenoms.lean,MathlibTest/unify_denoms.lean,scripts/noshake.json 7 55 ['Paul-Lez', 'YaelDillies', 'github-actions', 'joneugster', 'kbuzzard', 'mathlib4-merge-conflict-bot', 'miguelmarco'] nobody
84-29450
2 months ago
373-11922
373 days ago
17-14109
17 days
35603 2500223210-max
author:2500223210-max
 feat(GroupTheory/Frattini): add more theorems Add some contents about frattini subgroup into Mathlib GroupTheory Frattini.lean,including * (convenient lemma)A subgroup contained in all maximal subgroup is contained in the FRattini subgroup * A subgroup (say H) has a proper complement (meaning for some proper subgroup K, K and H generate the whole group)if and only if it is not contained in the Frattini subgroup. * A group is cyclic iff its Frattini factor(the quotient group wrt Frattini subgroup) is cyclic. * The Frattini factor of a finite p-group is elementary abelian(that is,an abelian group G with Gᵖ={1}) * A finite p-group has trivial Frattini subgroup iff the group is elementary abelian. * Burnside theorem of Frattini factor of finite p-group. --- new-contributor t-group-theory large-import awaiting-author 764/1 Mathlib/GroupTheory/Frattini.lean 1 3 ['github-actions', 'tb65536'] nobody
84-27131
2 months ago
84-27131
84 days ago
5-73876
5 days
33791 PhoenixIra
author:PhoenixIra
 feat: Generalization of FixedPointApproximants to CompletePartialOrder --- This PR provides a generalization of FixedPointApproximants to CompletePartialOrder. Not every theorem can be generalized, as sometimes we require additional conditions (namely `x ≤ f x`) in order to guarantee that the set is directed and thus the supremum is well-defined. This is not necessary in a CompleteLattice. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor t-order merge-conflict 223/100 Mathlib/Order/CompletePartialOrder.lean,Mathlib/SetTheory/Ordinal/FixedPointApproximants.lean 2 21 ['PhoenixIra', 'github-actions', 'mathlib-merge-conflicts', 'vihdzp'] PhoenixIra and vihdzp
assignee:PhoenixIra assignee:vihdzp
84-5435
2 months ago
84-5435
84 days ago
44-16098
44 days
35857 AlexeyMilovanov
author:AlexeyMilovanov
 feat(Logic.Equiv.BijectiveBase2): add bijective base-2 numeration This PR introduces a formalization of the bijective base-2 numeration system. Unlike standard binary representation, bijective base-2 avoids the "leading zeros" problem, providing a strict mathematical bijection between natural numbers (`ℕ`) and lists of booleans (`List Bool`). **Main additions:** * `Equiv.BijectiveBase2.toBits`: Encodes `ℕ` to `List Bool`. * `Equiv.BijectiveBase2.ofBits`: Decodes `List Bool` to `ℕ`. * `equivBijectiveBase2`: The formal `ℕ ≃ List Bool` equivalence. --- Zulip: [#PR reviews > PR #35857: Bijective Base-2 Numeration](https://leanprover.zulipchat.com/#narrow/channel/144837-PR-reviews/topic/PR.20.2335857.3A.20Bijective.20Base-2.20Numeration/with/576336540) Zulip: [#batteries > Upstreaming Nat.Bits](https://leanprover.zulipchat.com/#narrow/channel/348111-batteries/topic/Upstreaming.20Nat.2EBits/with/580736051) *(Note: This replaces my previously closed PR to avoid the terminology clash between "Dyadic" and dyadic rationals. The namespace and definitions have been updated accordingly).* *(Note: Used AI to assist with standardizing proof structures).* t-logic new-contributor LLM-generated blocked-by-batt-PR 95/0 Mathlib.lean,Mathlib/Logic/Equiv/ListNatBijective.lean 2 6 ['AlexeyMilovanov', 'SnirBroshi', 'github-actions', 'joneugster'] nobody
84-1506
2 months ago
56-37729
56 days ago
27-59600
27 days
35376 michaellee94
author:michaellee94
 feat(Geometry/Manifold): orientable manifolds --- - [x] depends on: #33189 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor WIP t-differential-geometry merge-conflict awaiting-author 2116/11 Mathlib.lean,Mathlib/Geometry/Manifold/Instances/MoebiusBand.lean,Mathlib/Geometry/Manifold/Instances/Real.lean,Mathlib/Geometry/Manifold/IsManifold/ExtChartAt.lean,Mathlib/Geometry/Manifold/IsManifold/InteriorBoundary.lean,Mathlib/Geometry/Manifold/Orientation.lean,Mathlib/Topology/Closure.lean 7 8 ['Rida-Hamadani', 'github-actions', 'mathlib-dependent-issues', 'mathlib-merge-conflicts'] nobody
82-82111
2 months ago
96-15157
96 days ago
0-100
1 minute
35734 mkaratarakis
author:mkaratarakis
 feat(NumberTheory): matrix bounds and Siegel's lemma application for Gelfond-Schneider This PR is the second component in the formalization of the Gelfond-Schneider Theorem (Hilbert's Seventh Problem), establishing the transcendence of $\alpha^\beta$. Building on the algebraic setup from the previous PR #35733, this file establishes analytical bounds on the linear system matrix and applies Siegel's Lemma (Lemma 8.2) to extract a bounded, non-trivial integer solution vector. We establish the exact upper bounds required to construct the auxiliary integer function $R(x)$. `c₃` and Matrix Bounds (`house_matrixA_le`)**: We define the bounding constant $c_3$, which aggregates the base bounds $c_2$ and the maximal houses of the algebraic preimages $\alpha', \beta', \gamma'$. Through extensive algebraic manipulation, we formally prove that the house of the entries in our linear system matrix $A$ is strictly bounded by $c_3^n * n^{(n - 1) / 2}$. Using the bounds established above, we apply `house.exists_ne_zero_int_vec_house_le` (a formalization of Lemma 8.2, p. 490) to guarantee the existence of a non-trivial vector of algebraic integers $\eta$ in the kernel of $A$. We define the solution bounding constant $c_4$ and prove the textbook bound that the house of our resulting coefficient vector $\eta$ satisfies $\forall k, \|\eta_k\| \leq c_4^n * n^{(n + 1) / 2}$. - [ ] depends on: #35733 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor t-number-theory blocked-by-other-PR 872/5 Mathlib.lean,Mathlib/NumberTheory/NumberField/House.lean,Mathlib/NumberTheory/Transcendental/GelfondSchneider/MainAlg.lean,Mathlib/NumberTheory/Transcendental/GelfondSchneider/MainAlgSetup.lean 4 3 ['github-actions', 'mathlib-dependent-issues'] nobody
82-32641
2 months ago
87-6856
87 days ago
0-306
5 minutes
34875 banrovegrie
author:banrovegrie
 feat(LinearAlgebra/Matrix): add Sherman-Morrison formula Mathlib has the matrix determinant lemma (`det_add_replicateCol_mul_replicateRow` in SchurComplement.lean) but lacked the corresponding inverse formula. This PR fills that gap. - Add `Matrix.inv_add_vecMulVec`: Sherman-Morrison formula for `(A + uv^T)^{-1}` - Add `Matrix.inv_sub_vecMulVec`: subtraction variant - Add `Matrix.isUnit_det_add_vecMulVec`: invertibility under the formula's hypotheses ## Test plan - [x] `lake build` passes - [x] Lines within 100 char limit - [x] All declarations have docstrings **Any specific AI usage?**: Used Copilot for review purposes. t-algebra new-contributor awaiting-author
label:t-algebra$
 135/0 Mathlib.lean,Mathlib/LinearAlgebra/Matrix/ShermanMorrison.lean 2 14 ['Xxxjdjdid', 'banrovegrie', 'chrisflav', 'copilot-pull-request-reviewer', 'eric-wieser', 'github-actions', 'wwylele'] chrisflav
assignee:chrisflav
82-20269
2 months ago
37-17358
37 days ago
69-6728
69 days
26013 tsuki8
author:tsuki8
 feat(Data/Finset/Card,Data/Set/Finite/Basic): TODO needs a better title add `card_bijOn` and `finset_subset_preimage_of_finite_image` Add `card_bijOn`: proves that for a bijection between finsets, their cardinalities are equal Add `finset_subset_preimage_of_finite_image`: constructs a finset subset preserving image cardinality Co-authored-by: Junyu Guo --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) awaiting-author t-data new-contributor 15/0 Mathlib/Data/Finset/Card.lean,Mathlib/Data/Set/Finite/Basic.lean 2 6 ['Ruben-VandeVelde', 'github-actions', 'mathlib-merge-conflicts'] nobody
81-66846
2 months ago
325-46579
325 days ago
13-85893
13 days
35805 adrianmartir
author:adrianmartir
 feat(NumberTheory/Divisors): Add `infinite_setOf_divisors_iff` This proves that the set of divisors `{ m | m | n }` of a natural number `n` is infinite if and only if `n` is zero. The first proof draft was by @Aristotle-Harmonic. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-number-theory new-contributor awaiting-author 10/0 Mathlib/NumberTheory/Divisors.lean 1 6 ['adrianmartir', 'alexjbest', 'github-actions', 'tb65536'] tb65536
assignee:tb65536
81-44172
2 months ago
58-23512
58 days ago
27-18698
27 days
35442 dhyan-aranha
author:dhyan-aranha
 feat: Affine line with doubled origin counter example --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor awaiting-author t-algebraic-geometry 305/0 Counterexamples.lean,Counterexamples/AffineLineWithDoubledOrigin.lean,Mathlib/AlgebraicGeometry/Limits.lean,Mathlib/Topology/Category/TopCat/Limits/Pullbacks.lean 4 21 ['BryceT233', 'chrisflav', 'dhyan-aranha', 'github-actions'] nobody
81-39776
2 months ago
94-27781
94 days ago
0-5488
1 hour
29713 jessealama
author:jessealama
 feat(Algebra/Homology): add Euler–Poincaré formula This PR builds on the generalized Euler characteristic framework from #31121 to prove the Euler-Poincaré formula for chain complexes. PR #31121 defines the Euler characteristic for general homological complexes. This PR specializes those definitions to ℤ-indexed chain complexes and proves the main Euler-Poincaré theorem. ### Main result (in `EulerPoincare.lean`) * `ChainComplex.eulerChar_eq_homologyEulerChar`: For ℤ-indexed bounded chain complexes of finite-dimensional modules over a division ring, the alternating sum of chain dimensions equals the alternating sum of homology dimensions. ### Supporting lemmas The file also provides dimension lemmas generalized to arbitrary `HomologicalComplex (ModuleCat k) c` (not just ℤ-indexed chain complexes): * `HomologicalComplex.dFrom_zero_range` / `dTo_zero_range`: zero range when the target/source object is zero * `HomologicalComplex.dFrom_range_finrank_eq_d` / `dTo_range_finrank_eq_d`: range of `dFrom`/`dTo` has the same dimension as the underlying differential * `HomologicalComplex.range_dTo_le_ker_dFrom`: range of `dTo` is contained in the kernel of `dFrom` --- - [ ] depends on: #38483 (`Antiperiodic.sum_Ico_shift` and bilinear cancellation lemma) Builds on: #31121 Related to: #29639, #29643, #29646 awaiting-author t-algebra new-contributor blocked-by-other-PR
label:t-algebra$
 428/0 Mathlib.lean,Mathlib/Algebra/BigOperators/Periodic.lean,Mathlib/Algebra/Homology/EulerPoincare.lean 2 26 ['github-actions', 'jessealama', 'joelriou', 'kim-em', 'mathlib-dependent-issues', 'mathlib-merge-conflicts', 'mathlib4-merge-conflict-bot'] nobody
81-35100
2 months ago
209-50272
209 days ago
35-45800
35 days
28286 bwangpj
author:bwangpj
 feat(Geometry/Manifold/ContMDiff): basic lemmas for analytic (`C^ω`) functions Add basic lemmas relating `ContMDiff` in the `C^ω` case to being `Analytic` on charts. This is upstreamed from [https://github.com/girving/ray](https://github.com/girving/ray). Co-authored-by: Geoffrey Irving --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) awaiting-author t-differential-geometry new-contributor 36/0 Mathlib/Geometry/Manifold/ContMDiff/Defs.lean 1 14 ['bwangpj', 'girving', 'github-actions', 'grunweg', 'kbuzzard', 'mathlib-merge-conflicts', 'sgouezel'] sgouezel
assignee:sgouezel
80-52314
2 months ago
255-48664
255 days ago
27-52841
27 days
34138 pfaffelh
author:pfaffelh
 feat(MeasureTheory): Introduce `DiscreteMeasure α` giving rise to a `Measure α` as a sum of `dirac`s Define `DiscreteMeasure α` as a structure with `weight : α → ℝ≥0∞` Define `toMeasure (w : DiscreteMeasure α) : Measure α` as a sum of diracs Show properties of the resulting objects This PR intends to start a more userfriendly interaction with discrete probability (measure) theory, in contrast to probability mass functions (`PMF`). There are two main differences between `DiscreteMeasure` and `PMF`: * Every `PMF` hast the additional property `HasSum 1`, making the resulting measure a probability measure. (For `DiscreteMeasure`, I intend to use the typeclass `IsProbabilityMeasure`in a later PR instead.) * The `toMeasure` function of `MassFunction` defines the measure as a sum of diracs, which immediately makes computations possible. Discussion thread on [zulip](https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/PMF.20Refactor.3A.20FunLike.20vs.20Definition.20Change) - depends on: #37060 --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-measure-probability new-contributor 224/0 Mathlib.lean,Mathlib/Algebra/GroupWithZero/Indicator.lean,Mathlib/Data/Set/Pairwise/Basic.lean,Mathlib/MeasureTheory/Measure/DiscreteMeasure.lean 4 27 ['DavidLedvinka', 'eric-wieser', 'github-actions', 'mathlib-merge-conflicts', 'metakunt', 'ocfnash', 'pfaffelh'] ocfnash
assignee:ocfnash
79-36544
2 months ago
31-82796
31 days ago
82-19320
82 days
34940 michaellee94
author:michaellee94
 feat: the graph of a continuous function on a $C^n$ manifold is a $C^n$ manifold --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-differential-geometry new-contributor awaiting-author merge-conflict 536/0 Mathlib.lean,Mathlib/Geometry/Manifold/ChartedSpace.lean,Mathlib/Geometry/Manifold/Instances/Graph.lean,Mathlib/Geometry/Manifold/IsManifold/Basic.lean,Mathlib/Topology/Constructions/Graph.lean 5 80 ['botbaki-review', 'github-actions', 'grunweg', 'mathlib-merge-conflicts', 'michaellee94', 'ocfnash'] ocfnash
assignee:ocfnash
78-22574
2 months ago
80-2769
80 days ago
15-5284
15 days
35193 Brian-Nugent
author:Brian-Nugent
 feat(Topology/Closeds): implement category of closed sets in topological spaces I copied over the nice API for working with `TopologicalSpace.Opens` as a category over for `TopologicalSpace.Closeds`. The only thing that did not immediately transfer was `Topology.IsInducing.functorObj` so I omitted it. Based on work of @kim-em --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-topology new-contributor please-adopt merge-conflict awaiting-author 385/0 Mathlib.lean,Mathlib/Topology/Category/TopCat/Closeds.lean,Mathlib/Topology/Category/TopCat/Opens.lean 2 24 ['Brian-Nugent', 'dagurtomas', 'github-actions', 'mathlib-merge-conflicts'] dagurtomas
assignee:dagurtomas
78-21720
2 months ago
63-21793
63 days ago
17-64811
17 days
35332 yisiox
author:yisiox
 feat(Computability): regular expressions match a regular language This PR adds a proof that the language matched by a regular expression is a regular language. This is achieved by the following constructions and proofs of their correctness - A DFA `epsilon` which accepts the empty language - A DFA `char (a : α)` which accepts the language containing only a single symbol - An Epsilon-NFA `concat (M₁ : εNFA α σ₁) (M₂ : εNFA α σ₂)` which accepts the concatenation of the languages of two Epsilon-NFAs - An Epsilon-NFA `kstar (M : εNFA α σ)` which accepts the Kleene star of a language of an Epsilon-NFA The following theorems on closure are added - `IsRegular.zero` - `IsRegular.one` - `IsRegular.top` - `IsRegular.singleton` - `IsRegular.mul` - `IsRegular.kstar` which demonstrates - `IsRegular.matches` --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-computability new-contributor 475/0 Mathlib/Computability/DFA.lean,Mathlib/Computability/EpsilonNFA.lean 2 2 ['github-actions'] nobody
78-11681
2 months ago
unknown
0-0
0 seconds
35834 homeowmorphism
author:homeowmorphism
 feat(Mathlib/GroupTheory/PresentedGroup): every group has a presentation We show that every group has a presentation defined by taking the free group with all of the group elements as the generators, and defining the relations as the kernel of the induced subjective homomorphism from that free group to the group itself. Use of AI: This has been vibe-coded with GPT-Codex-5.3, was updated through review, and was double-checked by the author. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor t-group-theory large-import awaiting-author LLM-generated 29/1 Mathlib/GroupTheory/PresentedGroup.lean 1 15 ['copilot-pull-request-reviewer', 'euprunin', 'github-actions', 'homeowmorphism', 'mathlib-bors', 'plp127', 'tb65536'] tb65536
assignee:tb65536
78-1895
2 months ago
78-1895
78 days ago
4-30613
4 days
36210 vbeffara
author:vbeffara
 feat(Combinatorics/SimpleGraph): definitions of graph contraction and graph minor A contraction is the image of a graph through a surjective function with connected fibers, and a minor is a contraction of a subgraph. This PR shows that being a contraction is transitive, but does not show the same for minors because the proof is more involved, it will be in a subsequent PR. The definitions are in `Prop` and do not contain data, but I'm not sure if that was the right choice. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-combinatorics new-contributor awaiting-author 151/0 Mathlib.lean,Mathlib/Combinatorics/SimpleGraph/Contraction.lean,Mathlib/Combinatorics/SimpleGraph/Minor.lean 3 8 ['YaelDillies', 'github-actions', 'mathlib-merge-conflicts', 'robin-carlier', 'vbeffara'] b-mehta
assignee:b-mehta
77-80651
2 months ago
24-22914
24 days ago
53-33900
53 days
35569 goliath-klein
author:goliath-klein
 refactor(PiTensorProduct/{InjectiveNorm, ProjectiveNorm}): deprecate `injectiveSeminorm` This PR: * Deprecates `PiTensorProduct.injectiveSeminorm` and supporting lemmas. * Moves the theory of `liftEquiv` from InjectiveSeminorm.lean to ProjectiveSeminorm.lean. No changes are introduced beyond adding deprecation notices, adapting docstrings, and moving material between files. The PR leaves InjectiveSeminorm.lean almost empty. A new implementation of `injectiveSeminorm`, one which reflects the common mathematical definition, is to be done. This is the third in a series of three PRs with the goal to [deprecate `PiTensorProuduct.injectiveSeminorm`](https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/injectiveSeminorm/with/568798633). --- - [ ] depends on: #35567 - [ ] depends on: #35568 Deprecations: - injectiveSeminorm - dualSeminorms_bounded - injectiveSeminorm_apply - norm_eval_le_injectiveSeminorm - injectiveSeminorm_le_projectiveSeminorm - injectiveSeminorm_tprod_le Preliminary work toward a reimplementation is at #33969. I've added Davood and myself to the "Authors" field, as we have now significantly refactored this module. Co-authored-by: Davood H. T. Tehrani [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor merge-conflict blocked-by-other-PR 290/366 Mathlib/Analysis/Normed/Module/PiTensorProduct/InjectiveSeminorm.lean,Mathlib/Analysis/Normed/Module/PiTensorProduct/ProjectiveSeminorm.lean 3 6 ['github-actions', 'mathlib-dependent-issues', 'mathlib-merge-conflicts'] nobody
77-40665
2 months ago
35-47983
35 days ago
52-16011
52 days
14313 grhkm21
author:grhkm21
 feat(RepresentationTheory/FdRep): FdRep is a full subcategory of Rep ``` /-- Equivalence between `FDRep` and the full subcategory of finite dimensional `Rep`. -/ def equivFiniteDimensional : FDRep k G ≌ FullSubcategory (fun V : Rep k G ↦ FiniteDimensional k V) ``` merge-conflict t-algebra t-category-theory new-contributor
label:t-algebra$
 47/8 Mathlib/RepresentationTheory/FDRep.lean 1 21 ['fpvandoorn', 'github-actions', 'grhkm21', 'joelriou', 'kim-em', 'mathlib-bors'] nobody
77-35140
2 months ago
670-1164
670 days ago
4-83177
4 days
33592 nielstron
author:nielstron
 feat(Computability/ContextFreeGrammar): mapping between two types of nonterminal symbols This PR picks up https://github.com/leanprover-community/mathlib4/pull/15895 and resolves the failing lemma by redefining Good symbols. --- I checked that https://github.com/leanprover-community/mathlib4/pull/13514 builds correctly when based on this build. PR for that is #33599 This is my first contribution please let me know of any changes I should outline. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) awaiting-author t-computability new-contributor 160/0 Mathlib/Computability/ContextFreeGrammar.lean 1 34 ['YaelDillies', 'github-actions', 'madvorak', 'nielstron'] nobody
77-24108
2 months ago
126-52635
126 days ago
10-68503
10 days
35144 daniel-carranza
author:daniel-carranza
 feat(CategoryTheory/Enriched): tensor product of enriched categories For a braided monoidal category `V`, defines the tensor product of `V`-categories `C` and `D`, and shows that the type of `V`-functors out of the tensor product `C \times D` is equivalent to the type of "enriched bifunctors" `EnrichedBifunctor V C D`. --- This work originates from infinity-cosmos project, where it is used to formalize the notion of cotensors in an enriched category. There are some additional coherence lemmas in a braided monoidal category which have been added. Currently, line 209 violates the style guideline that terminal simp calls should not be squeezed. When I tried to replace this with a single `simp`, I get an error message: `maximum recursion depth has been reached`. Any suggestions (either with this or anything else) are greatly appreciated - thank you! [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor t-category-theory infinity-cosmos awaiting-author 333/0 Mathlib.lean,Mathlib/CategoryTheory/Enriched/TensorProductCategory.lean,Mathlib/CategoryTheory/Monoidal/Braided/Basic.lean 3 12 ['daniel-carranza', 'emilyriehl', 'github-actions', 'joelriou', 'robin-carlier'] nobody
77-19815
2 months ago
100-8910
100 days ago
0-145
2 minutes
34236 homeowmorphism
author:homeowmorphism
 feat(GroupTheory/FinitelyPresentedGroup): add finitely presented groups Formulation of finitely presented groups feat(GroupTheory/FinitelyPresentedGroup): add finitely presented groups We define the notion of `IsFinitelyPresented` with equivalent datatype notions, what it means for a subgroup to be finitely generated in the normal closure, and some instances of finitely presented groups. This started as an ItaLean2025 project. The related Zulip thread is here: https://leanprover.zulipchat.com/#narrow/channel/541885-ItaLean-2025/topic/Projects.3A.20Finitely.20Presented.20Groups/with/567565752. Use of AI: * Aristotle was used for giving a preliminary proof of some statements as this is my first contribution and I wanted to understand how to prove things; they have since been changed. * GPT-5.2 was used to generate some of the proof sub-statements for efficiency once the mathematical blueprints of the proofs have been worked out. * GPT-5.3 was used to rapidly refactor the code. Human review by PR author in-progress, but got to a point where it would be good to get external input. * GPT-5.4 was used to refactor the variables. Human PR author then rewrote the whole thing. --- - [x] depends on: #34580 - [x] depends on: #34624 - [x] depends on: #35033 - [x] depends on: #35029 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-group-theory new-contributor merge-conflict blocked-by-other-PR 459/3 Mathlib.lean,Mathlib/GroupTheory/FinitelyPresentedGroup.lean 5 72 ['copilot-pull-request-reviewer', 'eric-wieser', 'github-actions', 'grunweg', 'homeowmorphism', 'kbuzzard', 'mathlib-bors', 'mathlib-dependent-issues', 'mathlib-merge-conflicts', 'tb65536'] nobody
77-18101
2 months ago
64-994
64 days ago
0-4650
1 hour
27226 xcloudyunx
author:xcloudyunx
 feat(Combinatorics/SimpleGraph): Add Subgraph.inclusion_edge_apply_coe and inclusion_edgeSet_apply_coe This PR continues the work from #25248. Original PR: https://github.com/leanprover-community/mathlib4/pull/25248 awaiting-author t-combinatorics new-contributor merge-conflict 14/0 Mathlib/Combinatorics/SimpleGraph/Subgraph.lean 1 4 ['b-mehta', 'github-actions', 'mathlib-merge-conflicts', 'xcloudyunx'] b-mehta
assignee:b-mehta
77-11208
2 months ago
283-77754
283 days ago
25-83942
25 days
33688 Citronhat
author:Citronhat
 feat(PMF): add expectation lemmas for Poisson PMF This PR adds some basic results about the Poisson distribution, its `PMF`, and its expectation. **New lemmas:** * `poissonPMF_apply` — an unfolding lemma for `poissonPMF`. * `poissonPMFReal_mul_eq_succ_mul` — the standard recursion identity for the Poisson mass function. * `poissonPMFReal_hasSum_nmul` — shows that `fun n ↦ poissonPMFReal r n * n` has sum `r`. * `poissonPMF_tsum_nmul` — the corresponding identity at the level of the `PMF`. * `poissonPMF_coe_tsum_nmul` — the same result after coercion to `ℝ`. Both `ℝ`-valued and `ℝ≥0∞`-valued formulations are included so that these results can be used conveniently in both Lebesgue and Bochner integration contexts. new-contributor t-measure-probability awaiting-author merge-conflict 21/0 Mathlib/Probability/Distributions/Poisson.lean 1 11 ['Citronhat', 'DavidLedvinka', 'github-actions', 'mathlib-merge-conflicts', 'urkud'] urkud
assignee:urkud
76-79588
2 months ago
88-7837
88 days ago
47-76876
47 days
34005 MSpill
author:MSpill
 feat: inverse function theorem for manifolds (concrete version) Proves the inverse function theorem for manifolds: given manifolds $M, N$ and a $C^n$ map $f : M \to N$ whose differential is a linear isomorphism at $p \in M$, then $f$ is a local diffeomorphism at $p$, provided that both $p$ and its image are interior points. The proof proceeds in 4 main steps: 1. Define composition of partial diffeomorphisms 2. Show that the extended chart at an interior point can be restricted to an open set on which it is a partial diffeomorphism, viewing the model vector space as a manifold modelled on itself trivially 3. Use the inverse function theorem (applied to $f$ written in coordinates) to obtain a partial diffeomorphism between model vector spaces 4. Compose with chart diffeomorphisms to obtain a partial diffeomorphism between the manifolds. ------ [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) awaiting-author t-differential-geometry new-contributor merge-conflict 232/3 Mathlib/Geometry/Manifold/LocalDiffeomorph.lean 1 12 ['MSpill', 'github-actions', 'grunweg', 'mathlib-merge-conflicts'] grunweg
assignee:grunweg
76-79343
2 months ago
127-18456
127 days ago
0-1082
18 minutes
34830 parabamoghv
author:parabamoghv
 feat(CategoryTheory/Monoidal): add definition of categorical groups This PR defines of categorical groups, also known as coherent 2-groups, in mathlib. Motivation: Categorical groups are well-studied structures in monoidal category theory, but are not currently available in mathlib. The definitions in this PR follow the existing design patterns used for Category, MonoidalCategory, and BraidedCategory. This PR focuses on setting up the core structure and notation. Basic lemmas and further developments will be provided in a subsequent PR. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-category-theory new-contributor WIP merge-conflict 163/0 Mathlib.lean,Mathlib/CategoryTheory/Monoidal/CategoricalGroups/Basic.lean 2 27 ['dagurtomas', 'github-actions', 'mathlib-merge-conflicts', 'parabamoghv', 'robin-carlier'] robin-carlier
assignee:robin-carlier
76-68063
2 months ago
91-50103
91 days ago
5-13145
5 days
36313 SproutSeeds
author:SproutSeeds
 feat(Inversion): cobounded tendsto near center Part of #5939 Add `tendsto_inversion_nhdsNE_center_cobounded` in `Mathlib/Geometry/Euclidean/Inversion/Basic.lean`, proving `Tendsto (inversion c R) (𝓝[≠] c) (Bornology.cobounded P)` for `R ≠ 0`. Tools used: Codex 5.3 extra high --- Happy to adjust naming, placement, or proof style based on maintainer preference. t-euclidean-geometry new-contributor LLM-generated awaiting-author 42/0 Mathlib/Geometry/Euclidean/Inversion/Basic.lean 1 11 ['SproutSeeds', 'euprunin', 'github-actions', 'jsm28', 'kbuzzard', 'ocfnash'] jsm28
assignee:jsm28
76-42778
2 months ago
59-39717
59 days ago
6-36700
6 days
36323 SproutSeeds
author:SproutSeeds
 feat(Inversion): discontinuity and center/global fderiv formulas Part of #5939 Adds the discontinuity-at-center lemma for inversion and derives the center/global `fderiv` formulas from it. This draft currently builds on the preceding cobounded-tendsto lemma from #36313 while that earlier slice is under review. Scope is limited to `Mathlib/Geometry/Euclidean/Inversion/Calculus.lean`. Tools used: Codex 5.3 extra high --- Happy to adjust naming, placement, or proof style based on maintainer preference. t-euclidean-geometry new-contributor LLM-generated 65/0 Mathlib/Geometry/Euclidean/Inversion/Basic.lean,Mathlib/Geometry/Euclidean/Inversion/Calculus.lean 2 2 ['github-actions'] nobody
76-18989
2 months ago
unknown
0-0
0 seconds
36326 Arnav-panjla
author:Arnav-panjla
 Feat/gaussian schwartz map feat(Analysis/SpecialFunctions/Gaussian): define the Gaussian as a Schwartz function in 1D Define the Gaussian function `x ↦ exp (-x^2)` as a `SchwartzMap` in the one-dimensional case. The proof establishes the Schwartz decay conditions by showing that polynomially weighted expressions of the form `(1 + x^2)^m * exp (-x^2)` are bounded. This allows the Gaussian to be packaged using the `SchwartzMap` API. During the implementation a few adjustments were required to match the current Mathlib API. In particular: * replace the non-existent `IsBigO.mul_right` with `IsBigO.of_bound` applied to the full product `(1 + x^2)^m * exp (-x^2)` * fix `mem_cocompact` usage by replacing `(hh_tendsto.eventually ...).mem_cocompact` with `mem_cocompact.mp (hh_tendsto ...)` * adjust the `hb_bound` step using `gcongr` with exact bounds so that both goals close * remove the unused declaration `hf_nonpos` * register the required import in `Mathlib.lean` This implements the one-dimensional case mentioned in the issue. The generalization to Gaussians associated with arbitrary positive-definite bilinear forms can be added in a follow-up PR. Closes #33072 t-analysis new-contributor 235/0 Mathlib.lean,Mathlib/Analysis/SpecialFunctions/Gaussian/SchwartzMap.lean 2 4 ['CoolRmal', 'github-actions'] nobody
76-12316
2 months ago
76-15727
76 days ago
76-15439
76 days
35951 parabamoghv
author:parabamoghv
 feat(CategoryTheory/Monoidal): evaluation coevaluation isomorphisms This PR adds four features to rigid categories: 1. `coevaluation_evaluation` and `evaluation_coevaluation` as isomorphism equalities: Using `IsIso` instances for the `evaluation` and `coevaluation` morphisms, we promote the morphism equalities to isomorphism equalities. 2. `ExactPairing Y X` from `ExactPairing X Y`: Using an exact pairing and `IsIso` instances for both `evaluation` and `coevaluation`, we swap the exact pairing by inverting the evaluation and coevaluation morphisms. Any suggestions for the definition name are welcome. Right now it is `ExactPairing.Symm`. The second choice was `ExactPairing.Swap`. 3. `HasLeftDual X` from `HasRightDual X`: Using a `HasRightDual X` instance and relevant `IsIso` instances, we construct a left dual. Similar construction for the other way. 4. `LeftDual` isomorphic to `RightDual`: Using relevant `IsIso` instances, we provide the isomorphism from the left dual of an object to the right dual. This can be achieved in two ways: either by using `leftDualIso` or using `rightDualIso`. We will prove in a subsequent PR that both these isomorphisms are equal. Motivation: This is part of an effort to formalize CategoricalGroups, which can be defined as right rigid groupoids. The approach is motivated by the discussion in [#34830](https://github.com/leanprover-community/mathlib4/pull/34830). Any comments or suggestions are welcome, especially about the naming. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-category-theory new-contributor awaiting-author 45/0 Mathlib/CategoryTheory/Monoidal/Rigid/Basic.lean 1 18 ['dagurtomas', 'github-actions', 'joelriou', 'parabamoghv', 'robin-carlier'] robin-carlier
assignee:robin-carlier
75-47495
2 months ago
64-15030
64 days ago
7-83579
7 days
35069 A-M-Berns
author:A-M-Berns
 feat(Geometry/Polygon): simple polygons and boundary map This PR introduces Simple polygons with the predicate `IsSimple`, which captures the idea of a non-self-intersecting boundary, in the file Simple.lean. In the file Boundary.lean, a boundary map from `AddCircle n` is defined. I prove that the range of this map is the boundary and that this map is injective if and only if the polygon is simple. I kept Boundary.lean and Simple.lean separate because future results will include stuff just about the boundary map independent of simplicity (e.g. that it is continuous in the appropriate setting) and stuff just about simple polygons independent of the boundary map (e.g. that for n = 3, IsSimple iff HasNondegenerateVertices.) I used Claude Code to help generate some of the proof material, but I golfed and edited all AI contribution. - [x] depends on: #34598 --- new-contributor t-euclidean-geometry LLM-generated 360/0 Mathlib.lean,Mathlib/Geometry/Polygon/Boundary.lean,Mathlib/Geometry/Polygon/Simple.lean,Mathlib/Logic/Equiv/Fin/Rotate.lean 4 30 ['A-M-Berns', 'eric-wieser', 'github-actions', 'joneugster', 'jsm28', 'mathlib-dependent-issues', 'mathlib-merge-conflicts', 'vihdzp', 'wwylele'] eric-wieser
assignee:eric-wieser
74-63896
2 months ago
86-15242
86 days ago
88-49240
88 days
33668 Citronhat
author:Citronhat
 feat(PMF): add lintegral formulas for PMF This PR introduces two lemmas describing the `lintegral` of a function with respect to the measure induced by a probability mass function: - `PMF.lintegral_eq_tsum` - `PMF.lintegral_eq_sum` These are the `ℝ≥0∞` analogues of the existing Bochner `integral` formulas `integral_eq_tsum` and `integral_eq_sum`. They could be useful for reasoning about expectations and integrability. In addition, the proof of `integral_eq_sum` is simplified by deriving it directly from `integral_eq_tsum` using `tsum_fintype`. t-measure-probability new-contributor awaiting-author merge-conflict 14/5 Mathlib/Probability/ProbabilityMassFunction/Integrals.lean 1 3 ['DavidLedvinka', 'github-actions', 'mathlib-merge-conflicts'] nobody
74-6118
2 months ago
80-40861
80 days ago
55-73479
55 days
36387 FrankieeW
author:FrankieeW
 feat(NumberTheory/QuadraticField): parameter uniqueness for quadratic fields ## Summary Prove that every quadratic field `ℚ(√d)` can be normalized to have a squarefree integer parameter, and that this parameter is unique. ## Main Results - `Qsqrtd.rescale`: rescaling isomorphism `ℚ(√d) ≃ₐ[ℚ] ℚ(√(a²d))` for `a ≠ 0` - `Qsqrtd_iso_int_param`: every `ℚ(√d)` is isomorphic to one with an integer parameter - `Qsqrtd_iso_squarefree_int_param`: every `ℚ(√d)` is isomorphic to one with a squarefree integer parameter - `Qsqrtd.param_unique`: if `ℚ(√d₁) ≃ₐ[ℚ] ℚ(√d₂)` with both `d₁, d₂` squarefree and `≠ 1`, then `d₁ = d₂` ## Helper Lemmas - `squarefree_eq_of_rat_sq_mul`: if `d₁ = d₂ · r²` with both squarefree, then `d₁ = d₂` - `int_dvd_of_ratio_square`: if `d₁/d₂` is a rational square and `d₂` is squarefree, then `d₂ ∣ d₁` - `not_isSquare_neg_one_rat`: `-1` is not a square in `ℚ` --- - [ ] depends on: #36347 WIP t-number-theory blocked-by-other-PR new-contributor large-import LLM-generated 400/0 Mathlib.lean,Mathlib/Algebra/QuadraticAlgebra/Defs.lean,Mathlib/Algebra/Squarefree/Basic.lean,Mathlib/NumberTheory/QuadraticField/Basic.lean 4 4 ['FrankieeW', 'github-actions', 'mathlib-dependent-issues'] nobody
73-69125
2 months ago
74-63395
74 days ago
0-2
2 seconds
35058 GrigorenkoPV
author:GrigorenkoPV
 chore: move tendsto_{floor,ceil}_at{Top,Bot} Moves: - Topology.Algebra.Order.Floor.tendsto_floor_atTop -> Order.Filter.AtTopBot.Floor.tendsto_floor_atTop - Topology.Algebra.Order.Floor.tendsto_floor_atBot -> Order.Filter.AtTopBot.Floor.tendsto_floor_atBot - Topology.Algebra.Order.Floor.tendsto_ceil_atTop -> Order.Filter.AtTopBot.Floor.tendsto_ceil_atTop - Topology.Algebra.Order.Floor.tendsto_ceil_atBot -> Order.Filter.AtTopBot.Floor.tendsto_ceil_atBot --- Tracked in #7987 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor large-import awaiting-author 22/25 Mathlib/Order/Filter/AtTopBot/Floor.lean,Mathlib/Topology/Algebra/Order/Floor.lean 2 3 ['GrigorenkoPV', 'github-actions', 'j-loreaux'] nobody
72-84346
2 months ago
72-84346
72 days ago
27-45743
27 days
31670 edwin1729
author:edwin1729
 feat(Topology/Order): Scott Topology is Sober over Algebraic DCPO --- [Zulip discussion](https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/.3E.20Algebraic.20complete.20partial.20order.20and.20domain.20theory/with/536359313) here (2/2) PR to prove result in Stone Duality. Here we prove that Scott Topologies over Algebraic DCPOs are sober. - [ ] depends on: #31662 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-topology blocked-by-other-PR new-contributor merge-conflict 510/1 Mathlib.lean,Mathlib/Topology/Order/ScottTopology.lean,Mathlib/Topology/Order/ScottTopologyDCPO.lean,docs/references.bib 4 5 ['github-actions', 'mathlib-merge-conflicts', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
72-82228
2 months ago
unknown
0-0
0 seconds
35812 khwilson
author:khwilson
 feat(MeasureTheory/Group/GeometryOfNumbers): successive minima and existence of a directional basis Define the successive minima of a discrete subgroup of a real vector space with respect to a convex set. These invariants show up throughout the geometry of numbers and are the focus of Minkowski's Second Theorem (whose statement is left here with a `proof_wanted`). Note: The key lemma is that the "gauge set" of the convex set is closed. I took the approach of showing that it is sequentially closed. There's an alternative approach via showing it's the union of a finite number of closed sets. I personally thought this approach was more intuitive, but the union approach may result in a slightly shorter proof. Co-authored-by: Yaël Dillies --- - [x] depends on #37738 - [x] depends on #37740 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor t-measure-probability awaiting-author 392/33 Mathlib/Algebra/Module/ZLattice/Basic.lean,Mathlib/Analysis/Convex/Basic.lean,Mathlib/Analysis/Convex/Body.lean,Mathlib/Analysis/Convex/Gauge.lean,Mathlib/LinearAlgebra/Basis/Fin.lean,Mathlib/LinearAlgebra/FiniteDimensional/Lemmas.lean,Mathlib/LinearAlgebra/LinearIndependent/Lemmas.lean,Mathlib/MeasureTheory/Group/GeometryOfNumbers.lean 6 32 ['Vierkantor', 'YaelDillies', 'github-actions', 'joneugster', 'khwilson', 'mathlib-merge-conflicts'] YaelDillies
assignee:YaelDillies
72-75783
2 months ago
45-66291
45 days ago
36-18181
36 days
36463 AlexeyMilovanov
author:AlexeyMilovanov
 feat(Data.Nat.Bits): add Nat.ofBits and prove bits_injective This PR introduces `Nat.ofBitsList` for `List Bool` and provides the missing proofs that the standard binary representation `Nat.bits` is injective (`Nat.bits_injective`) and possesses a right inverse for normalized lists (`Nat.bits_ofBitsList`). `ofBitsList` is implemented as an `abbrev` using `foldr` (keeping it transparent to tactics like `simp`). It serves as the exact left inverse to `bits`. Furthermore, `bits_ofBitsList` establishes that `bits` and `ofBitsList` form a bijection between `ℕ` and the set of lists with no trailing `false` values. This avoids the name collision with `Nat.ofBits` from `Batteries` and aligns with previous Zulip discussions (see [here](https://leanprover.zulipchat.com/#narrow/channel/144837-PR-reviews/topic/PR.20.2335857.3A.20Bijective.20Base-2.20Numeration)) regarding the utility of having a complete list-based API for `Nat.bits` in the library. CC: @linesthatinterlace - Adds `Nat.ofBitsList` (as an `abbrev`) - Adds `Nat.ofBitsList_bits` (left inverse property) - Adds `Nat.bits_injective` - Adds `Nat.ofBitsList_eq_zero_iff` (helper lemma for lists without trailing zeros) - Adds `Nat.bits_ofBitsList` (right inverse property) --- Zulip: [#PR reviews > PR #35857: Bijective Base-2 Numeration](https://leanprover.zulipchat.com/#narrow/channel/144837-PR-reviews/topic/PR.20.2335857.3A.20Bijective.20Base-2.20Numeration/with/576336540) Zulip: [#batteries > Upstreaming Nat.Bits](https://leanprover.zulipchat.com/#narrow/channel/348111-batteries/topic/Upstreaming.20Nat.2EBits/with/580736051) t-data new-contributor awaiting-author blocked-by-batt-PR 68/1 Mathlib/Data/Nat/Bits.lean 1 5 ['github-actions', 'joneugster', 'linesthatinterlace'] nobody
72-67464
2 months ago
63-19384
63 days ago
9-58085
9 days
35684 spitters
author:spitters
 feat(CategoryTheory/MarkovCategory): Kleisli PMF is a Markov category Add `Mathlib/CategoryTheory/MarkovCategory/KleisliPMF.lean` showing that `KleisliCat PMF` is a `MarkovCategory`. Uses `Prod` as tensor and `PUnit` as unit; reuses Mathlib's existing `KleisliCat`, `LawfulMonad PMF`, and `MarkovCategory` infrastructure. Builds the full instance stack: MonoidalCategory → BraidedCategory → SymmetricCategory → CopyDiscardCategory → MarkovCategory --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-category-theory new-contributor awaiting-author merge-conflict 323/1 Mathlib.lean,Mathlib/CategoryTheory/MarkovCategory/KleisliPMF.lean,Mathlib/Tactic/Linter/DirectoryDependency.lean 3 6 ['dagurtomas', 'github-actions', 'mathlib-merge-conflicts', 'spitters'] nobody
72-57344
2 months ago
85-3189
85 days ago
2-36419
2 days
35738 GrigorenkoPV
author:GrigorenkoPV
 perf: remove some `aesop`s and `grind`s --- Needs benchmarking. After that I can split it into several smaller portions, if needed. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor awaiting-author merge-conflict 236/92 Mathlib/Data/Finset/Card.lean,Mathlib/Data/Rel.lean,Mathlib/Data/Set/Lattice/Image.lean,Mathlib/Data/Set/Prod.lean,Mathlib/Logic/Equiv/Prod.lean,Mathlib/Order/Interval/Finset/Basic.lean,Mathlib/Order/KrullDimension.lean,Mathlib/Order/SupIndep.lean 8 7 ['github-actions', 'mathlib-merge-conflicts', 'themathqueen', 'vihdzp'] nobody
72-57343
2 months ago
86-39023
86 days ago
0-45583
12 hours
36487 samueloettl
author:samueloettl
 feat(Dynamics): Ergodicity characterization --- - [ ] depends on: #35402 - [x] depends on: #35451 This is a work in progress for a characterization of ergodicity via a Birkhoff Average. Coarse Feedback is very encouraged. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) WIP new-contributor large-import blocked-by-other-PR 421/1 Mathlib/Dynamics/Ergodic/Function.lean,Mathlib/Dynamics/Ergodic/OnAverageIndependent.lean,Mathlib/Topology/MetricSpace/Pseudo/Basic.lean 3 3 ['github-actions', 'mathlib-dependent-issues'] nobody
72-22181
2 months ago
72-22200
72 days ago
0-163
2 minutes
36503 Mrigna01
author:Mrigna01
 Add false theorem test file --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor 135/0 Mathlib/FalseBench/FalseTheorems.lean 1 3 ['github-actions'] nobody
71-80626
2 months ago
71-80716
71 days ago
71-80428
71 days
14603 awueth
author:awueth
 feat: degree is invariant under graph isomorphism --- Mathlib has the definition `SimpleGraph.Iso.mapNeighborSet` which is an equivalence between neighbor sets induced by an isomorphism. Would it be beneficial to add the same equivalence for `neighborFinset`? [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) WIP t-combinatorics new-contributor 24/0 Mathlib/Combinatorics/SimpleGraph/Map/Finite.lean 1 12 ['SnirBroshi', 'awueth', 'github-actions', 'jcommelin', 'kim-em', 'urkud'] nobody
71-62024
2 months ago
648-22463
648 days ago
31-44440
31 days
33599 nielstron
author:nielstron
 feat(Computability/ContextFreeGrammar): closure under union --- This PR picks up https://github.com/leanprover-community/mathlib4/pull/13514 and resolves the outstanding errors. - [ ] depends on: #33592 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) blocked-by-other-PR t-computability new-contributor 498/0 Mathlib/Computability/ContextFreeGrammar.lean 1 2 ['github-actions', 'mathlib4-dependent-issues-bot'] nobody
71-45461
2 months ago
126-54320
126 days ago
10-65787
10 days
9605 davikrehalt
author:davikrehalt
 feat(Data/Finset & List): Add Lemmas for Sorting and Filtering This PR includes several useful lemmas to the Data/Finset and Data/List modules in Lean's mathlib: 1. `toFinset_filter` (List): Shows that filtering commutes with toFinset. 2. `toFinset_is_singleton_implies_replicate` (List): Shows a list with a singleton toFinset is a List.replicate. 3. `filter_sort_commute` (Finset): Sorting and filtering can be interchanged in Finsets. 4. `Sorted.filter` (List): A sorted list stays sorted after filtering. 5. `Sorted.append_largest` (List): Appending the largest element keeps a list sorted. 6. `sort_monotone_map` (Finset): Relates sorting of a Finset after mapping to sorting of a list. 7. `sort_insert_largest` (Finset): Sorting a Finset with an inserted largest element. 8. `sort_range` (Finset): Sorting a range in a Finset equals the corresponding range list. 9. ~~`filter_eval_true` (List): Filtering a list with a predicate always true keeps the list unchanged.~~ 10. ~~`filter_eval_false` (List): Filtering with an always-false predicate gives an empty list.~~ 11. ~~`pairwise_concat` (List): Iff condition for Pairwise relation in concatenated lists (similar to pairwise_join).~~ 12. `list_map_toFinset` (Finset): toFinset commutes with map under injection --- - [x] depends on: #15952 This is my first PR to mathlib, so I'm not too familiar with etiquette's and more specifically there are two proofs in the PR which uses aesop, and I am not sure if it's frowned upon. I kept the aesop in there for now as I couldn't construct very short proofs otherwise. The sort_range function proof was suggested in https://leanprover.zulipchat.com/#narrow/stream/113489-new-members/topic/Computing.20Finset.20sort.20of.20Finset.20range/near/410346731 by Ruben Van de Velde. Thanks for your time for improving this PR. please-adopt t-data new-contributor merge-conflict awaiting-author 71/0 Mathlib/Data/Finset/Basic.lean,Mathlib/Data/Finset/Image.lean,Mathlib/Data/Finset/Sort.lean,Mathlib/Data/List/Sort.lean 4 30 ['YaelDillies', 'davikrehalt', 'eric-wieser', 'github-actions', 'jcommelin', 'urkud', 'vihdzp'] nobody
71-44917
2 months ago
851-16405
851 days ago
12-48883
12 days
35652 dennj
author:dennj
 feat(LinearAlgebra/Matrix): add `Matrix.mul_eq_smul_one_symm` Adds three lemmas: - IsLeftRegular.mul_eq_of_comm (Algebra/Group/Defs.lean): if a is left-regular, a * b = c, and c commutes with a, then b * a = c. Generalises IsLeftRegular.mul_eq_one_symm from the c = 1 case. - IsRightRegular.mul_eq_of_comm: symmetric version. - mul_eq_smul_one_symm (Algebra/Group/Action/Defs.lean): scalar variant of mul_eq_one_symm. For a monoid β with a compatible scalar action by α, if a * b = c • 1 and a is left-regular, then b * a = c • 1. Proven in one line via IsLeftRegular.mul_eq_of_comm, since c • 1 is central thanks to IsScalarTower α β β and SMulCommClass α β β. The additive analogues are produced by to_additive. The general mul_eq_of_comm helpers capture the underlying pattern: "a left/right-regular element can be cancelled when the conclusion commutes with it" and are reusable beyond this PR's specialisation. Human made PR t-algebra new-contributor LLM-generated awaiting-author
label:t-algebra$
 28/0 Mathlib/Algebra/Group/Action/Defs.lean,Mathlib/Algebra/Group/Defs.lean 1 7 ['dagurtomas', 'dennj', 'eric-wieser', 'github-actions', 'grunweg'] ocfnash
assignee:ocfnash
71-25160
2 months ago
18-80963
18 days ago
24-65258
24 days
36587 yhx-12243
author:yhx-12243
 feat(Algebra/GCDMonoid): Distributive lattice structure for Associates in GCDMonoid Add a distributive lattice structure for `Associates α` in `GCDMonoid`. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra new-contributor
label:t-algebra$
 60/3 Mathlib.lean,Mathlib/Algebra/GCDMonoid/Basic.lean,Mathlib/Algebra/GCDMonoid/DistribLattice.lean 2 2 ['github-actions'] nobody
70-53738
2 months ago
67-24313
67 days ago
3-29502
3 days
35662 FrankieeW
author:FrankieeW
 feat(NumberTheory/Zsqrtd): add Archimedean instance via le_arch This PR follows a suggestion made in #35606 , #35481 - add `Zsqrtd.le_arch_smul` in `Mathlib/NumberTheory/Zsqrtd/Basic.lean` - use it to provide `instance : Archimedean (ℤ√d)` in the `Nonsquare` section - refactor the proof using symmetry to reduce duplication while keeping checks clean --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-number-theory new-contributor awaiting-author merge-conflict LLM-generated 46/4 Mathlib/NumberTheory/PellMatiyasevic.lean,Mathlib/NumberTheory/Zsqrtd/Basic.lean 2 13 ['FrankieeW', 'MichaelStollBayreuth', 'euprunin', 'github-actions', 'mathlib-merge-conflicts', 'tb65536'] MichaelStollBayreuth
assignee:MichaelStollBayreuth
70-53474
2 months ago
73-31590
73 days ago
15-50475
15 days
36103 SnkXyx
author:SnkXyx
 feat(Algebra/MvPolynomial/CharacteristicSet): add Characteristic Set This PR adds some definitions and theorems of Characteristic Set Method (also known as Wu's Method). Definitions: * `MvPolynomial.mainDegree` * `MvPolynomial.initialOf` * `MvPolynomial.reducedTo` * `TriangulatedSet` * `MvPolynomial.pseudo` * `MvPolynomial.setPseudo` * `MvPolynomial.isRemainder` * `MvPolynomial.isSetRemainder` * `AscendingSetTheory` * `TriangulatedSet.isAscendingSet` * `HasBasicSet` * `TriangulatedSet.isCharacteristicSet` * `MvPolynomial.List.characteristicSet` * `MvPolynomial.List.zeroDecomposition` Main Theorems: * `MvPolynomial.initialOf_mul_eq`: $init_i(p \cdot q) = init_i(p) \cdot init_i(q)$ if there is no zero divisors in the coefficient ring. * `TriangulatedSet.instWellFoundedLT`: The set of Triangulated Sets is well-founded under the lexicographic ordering. * `MvPolynomial.pseudo_remainder_isRemainder`: The remainder $r$ of $g$ by $f$ is reduced with respect to $f$ and satisfies $init(f)^s \cdot g = q \cdot f + r$ for some $s \in \mathbb{N}$ and $q \in R[X_{\sigma}]$. * `MvPolynomial.setPseudo_remainder_isSetRemainder`: The remainder $r$ of $g$ by a set $S$ is reduced with respect to $S$ and satisfies $(\prod S_i^{e_i}) \cdot g = \sum q_i \cdot S_i + r$ for some sequences $\{e_i\}$ and $\{q_i\}$. * `MvPolynomial.setPseudo_remainder_eq_zero_of_mem`: The remainder of $p$ by a set $S$ is $0$ if $p \in S$. * `MvPolynomial.List.basicSet_append_lt_of_exists_reducedToSet`: Appending an element which is reduced w.r.t. the basic set of list strictly decreases the order. * `MvPolynomial.List.characteristicSet_isCharacteristicSet`: The computed Characteristic Set $CS$ satisfies the key algebraic property (pseudo-remainder of input polynomials is 0) and the geometric property ( $Zero(PS) \subseteq Zero(CS)$ ). * `MvPolynomial.List.vanishingSet_eq_zeroDecomposition_union`: The zero set of a polynomial system $PS$ can be decomposed into a finite union of "quasi-varieties" defined by triangular sets: $Zero(PS) = \bigcup_{CS \in \mathcal{ZD}} Zero(CS / \text{InitialProd}(CS))$ The PR is upstreamized from [github.com/WuProver/lean_characteristic_set](https://github.com/WuProver/lean_characteristic_set) --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) - [x] depends on: #36386 - [x] depends on: #37791 t-algebra new-contributor blocked-by-other-PR
label:t-algebra$
 4085/0 Mathlib.lean,Mathlib/Algebra/MvPolynomial/CharacteristicSet/AscendingSet.lean,Mathlib/Algebra/MvPolynomial/CharacteristicSet/CharacteristicSet.lean,Mathlib/Algebra/MvPolynomial/CharacteristicSet/Initial.lean,Mathlib/Algebra/MvPolynomial/CharacteristicSet/MainDegree.lean,Mathlib/Algebra/MvPolynomial/CharacteristicSet/Order.lean,Mathlib/Algebra/MvPolynomial/CharacteristicSet/PseudoDivision.lean,Mathlib/Algebra/MvPolynomial/CharacteristicSet/Reduce.lean,Mathlib/Algebra/MvPolynomial/CharacteristicSet/StandardAscendingSet.lean,Mathlib/Algebra/MvPolynomial/CharacteristicSet/TriangularSet.lean,Mathlib/Algebra/MvPolynomial/CharacteristicSet/WeakAscendingSet.lean,docs/references.bib 14 20 ['Hagb', 'github-actions', 'mathlib-dependent-issues', 'mathlib-merge-conflicts'] nobody
70-45393
2 months ago
14-45624
14 days ago
19-35726
19 days
36529 idontgetoutmuch
author:idontgetoutmuch
 Connection 1 form scribbles Some thoughts on connection 1-forms - not meant to be ever merged but here for convenience of discussion new-contributor t-differential-geometry 496/52 Mathlib/Analysis/ODE/PicardLindelof.lean,Mathlib/Geometry/Manifold/Algebra/FundamentalVectorField.lean,Mathlib/Geometry/Manifold/IntegralCurve/Compact.lean,Mathlib/Geometry/Manifold/IntegralCurve/ExistUnique.lean,Mathlib/Order/Filter/Prod.lean 5 2 ['github-actions'] nobody
70-34399
2 months ago
unknown
0-0
0 seconds
36119 Ruizsolveall
author:Ruizsolveall
 feat(Topology/Covering): fundamental group of the circle is ℤ - Proves that the fundamental group of the circle `π₁(S¹, 0)` is isomorphic to `ℤ`, via covering space theory. - Constructs the winding number map `nLoop : ℤ → Path 0 0` on `AddCircle 1`, and proves it is surjective (`nLoop_surjective`), injective (`nLoop_homotopic_iff`), and additive (`nLoop_add`). - Assembles these into the group isomorphism `windingNumberIso : Multiplicative ℤ ≃* FundamentalGroup (AddCircle 1) 0`. ## Approach Uses the covering map `ℝ → AddCircle 1` and unique path lifting to establish the bijection between homotopy classes of loops and integers (winding numbers). Homotopy invariance of lifted endpoints gives injectivity; surjectivity follows from lifting arbitrary loops. Additivity uses path concatenation of lifts in the simply connected total space `ℝ`. ## AI disclosure I used Claude (Anthropic) to write the PR description, code comments, and to help refine code style. The proof strategy and all Lean code are my own. I understand and can vouch for all the code in this PR. t-topology new-contributor awaiting-author LLM-generated 236/0 Mathlib.lean,Mathlib/Topology/Covering/FundamentalGroupCircle.lean 2 26 ['Ruizsolveall', 'SnirBroshi', 'b-mehta', 'dagurtomas', 'github-actions', 'grunweg', 'vihdzp'] nobody
70-15701
2 months ago
71-8233
71 days ago
8-31258
8 days
36347 FrankieeW
author:FrankieeW
 feat(NumberTheory/QuadraticField): define quadratic number fields as QuadraticAlgebra ℚ d 0 Define `Qsqrtd d` as `QuadraticAlgebra ℚ d 0`, representing the quadratic number field `ℚ(√d)`. Prove trace and norm results, show `Qsqrtd d` is a number field and a quadratic extension when `d` is not a perfect square, and prove that `ℚ(√0)` and `ℚ(√1)` are not fields. Include `IsQuadraticField` as a predicate for quadratic extensions of `ℚ`, and bridge lemmas connecting squarefree integer parameters to the non-square condition. This PR is part of a series upstreaming the [QuadraticNumberFields](https://github.com/FrankieeW/QuadraticNumberFields) project. [Zulip discussion](https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/quadratic.20number.20fields) --- ### PRs - #36347 （this PR） - #36387 --- t-number-theory new-contributor large-import awaiting-author LLM-generated 191/0 Mathlib.lean,Mathlib/Algebra/QuadraticAlgebra/Defs.lean,Mathlib/Algebra/Squarefree/Basic.lean,Mathlib/NumberTheory/QuadraticField/Basic.lean 4 29 ['FrankieeW', 'eric-wieser', 'github-actions', 'riccardobrasca', 'tb65536', 'wwylele'] tb65536
assignee:tb65536
69-75768
2 months ago
67-25763
67 days ago
7-9258
7 days
35651 sun123zxy
author:sun123zxy
 feat(Mathlib/RingTheory/Ideal/Cotangent): `Submodule.map` definition of cotangent spaces This PR adds an alternative definition of the cotangent space as an image under the R-module quotient map. --- Split from PR #33247 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-ring-theory new-contributor awaiting-author 47/20 Mathlib/RingTheory/Ideal/Cotangent.lean,Mathlib/RingTheory/Ideal/Quotient/Operations.lean 2 20 ['chrisflav', 'erdOne', 'github-actions', 'mathlib-merge-conflicts', 'sun123zxy'] chrisflav
assignee:chrisflav
69-32812
2 months ago
67-14511
67 days ago
16-12398
16 days
22314 shetzl
author:shetzl
 feat: add leftmost derivations for context-free grammars Leftmost derivations are often easier to reason about than arbitrary derivations. This PR adds leftmost variants of Rewrites, Produces and Derives to the existing definition of context-free grammars and proves that a string of terminals can be derived iff it can be leftmost derived. Co-authored-by: Tobias Leichtfried --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-computability awaiting-author new-contributor 383/0 Mathlib.lean,Mathlib/Computability/LeftmostDerivation.lean 2 55 ['YaelDillies', 'github-actions', 'madvorak', 'mathlib4-merge-conflict-bot', 'shetzl'] nobody
69-19867
2 months ago
378-43163
378 days ago
72-2714
72 days
31610 rudynicolop
author:rudynicolop
 feat(Computability/NFA): Kleene star closure for Regular Languages via NFA This PR constructs a Kleene star closure for non-epsilon NFAs, and proves that regular languages are closed under Kleene star. The NFA construction is `NFA.kstar`. The main theorems are: - `NFA.accepts_kstar`: demonstrates that `M.kstar` accepts the Kleene star closure of the language of `M`. - `IsRegular.kstar`: demonstrates that regular languages are closed under Kleene star. There is an onging zulip discussion about regular languages in Mathlib: https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/Regular.20languages.3A.20the.20review.20queue/with/553759136 This discussion is also tracked at #24205. Furthermore, the construction and proofs in this PR are heavily inspired by @TpmKranz from his #15651. #15651 supersedes this PR, so if it is accepted then this PR is not needed. --- - [x] depends on: #31038 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-computability new-contributor awaiting-author awaiting-CI 405/7 Mathlib/Computability/NFA.lean 1 16 ['YaelDillies', 'ctchou', 'github-actions', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
69-19766
2 months ago
128-12148
128 days ago
43-77831
43 days
36757 alok
author:alok
 feat(Order/Filter): add Filter.IsFree and Filter.IsNonprincipal ## Summary Adds two filter predicates and their basic API: - **`Filter.IsFree`**: no point belongs to every set (`f.ker = ∅`), equivalently `f ≤ cofinite` - **`Filter.IsNonprincipal`**: not equal to `𝓟 s` for any set `s` Every free `NeBot` filter is non-principal (`IsFree.isNonprincipal`), but the converse fails for general filters (e.g. `𝓝 x` in a non-discrete T₁ space is non-principal but not free). For ultrafilters the two notions coincide (`Ultrafilter.isNonprincipal_iff_isFree`). On finite types, no `NeBot` filter is free (`not_isFree_of_neBot`). ## Test plan - [x] `lake build Mathlib.Order.Filter.Cofinite` passes - [x] `lake build Mathlib.Order.Filter.Ultrafilter.Basic` passes 🤖 Generated with [Claude Code](https://claude.com/claude-code) t-order new-contributor 98/1 Mathlib/Order/Filter/Cofinite.lean,Mathlib/Order/Filter/Ultrafilter/Basic.lean 2 2 ['github-actions'] nobody
66-66437
2 months ago
66-65037
66 days ago
0-3928
1 hour
36825 danlyng
author:danlyng
 feat(MeasureTheory/Integral/IntegralEqImproper): add Iic variants of nonneg/nonpos derivative integrability and FTC-2 Add the `Iic` counterparts of the existing `Ioi` results for automatic integrability of derivatives on semi-infinite intervals and the corresponding corollaries computing the integral value. Additionally, apply minor fixes to existing docstrings. New declarations: - `integrableOn_Iic_deriv_of_nonneg` / `integrableOn_Iic_deriv_of_nonneg'` - `integrableOn_Iic_deriv_of_nonpos` / `integrableOn_Iic_deriv_of_nonpos'` - `integral_Iic_of_hasDerivAt_of_nonneg` / `integral_Iic_of_hasDerivAt_of_nonneg'` - `integral_Iic_of_hasDerivAt_of_nonpos` / `integral_Iic_of_hasDerivAt_of_nonpos'` These mirror `integrableOn_Ioi_deriv_of_nonneg`, `integrableOn_Ioi_deriv_of_nonpos`, `integral_Ioi_of_hasDerivAt_of_nonneg`, `integral_Ioi_of_hasDerivAt_of_nonpos` and their primed variants. t-measure-probability new-contributor awaiting-author 107/9 Mathlib/MeasureTheory/Integral/IntegralEqImproper.lean 1 7 ['EtienneC30', 'github-actions'] EtienneC30
assignee:EtienneC30
62-30167
2 months ago
62-30167
62 days ago
2-67942
2 days
36719 NoneMore
author:NoneMore
 feat(ModelTheory): add `PartialType` for first-order theories This PR adds the definitions of partial types over theories and over parameter sets, and proves several equivalent characterizations. --- - [ ] depends on: #36667 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) blocked-by-other-PR t-logic new-contributor 468/0 Mathlib.lean,Mathlib/ModelTheory/PartialTypes.lean,Mathlib/ModelTheory/Semantics.lean,Mathlib/ModelTheory/Syntax.lean 4 5 ['NoneMore', 'github-actions', 'mathlib-dependent-issues', 'vihdzp'] nobody
58-49042
1 month ago
67-48396
67 days ago
0-322
5 minutes
37101 fsefzig
author:fsefzig
 feat: definition of kummer polynomials and prove that AdjoinRoot (KummerPolynomial n s) is etale This defines the Kummer polynomial ` KummerPolynomial n s := X^n - s` over a ring R and constructs the following instances for `AdjoinRoot (KummerPolynomial n s)`: · Faithfullyflat · SmoothOfRelativeDimension 0 · Etale t-ring-theory new-contributor awaiting-author 345/0 Mathlib.lean,Mathlib/RingTheory/AdjoinRootKummer.lean 2 24 ['acmepjz', 'chrisflav', 'fsefzig', 'github-actions', 'vihdzp'] nobody
51-14626
1 month ago
unknown
0-0
0 seconds
37585 cascone26
author:cascone26
 feat: formal statements of Robin's and Lagarias' inequalities equivalent to RH ## Summary This PR adds `Mathlib/NumberTheory/LSeries/RobinInequality.lean`, which contains formal Lean 4 statements of two classical equivalences of the Riemann Hypothesis: **Robin's theorem (1984):** RH ↔ σ₁(n) < e^γ · n · ln(ln(n)) for all n > 5040 **Lagarias' theorem (2002):** RH ↔ σ₁(n) ≤ H_n + exp(H_n) · ln(H_n) for all n ≥ 1 ### New declarations - `robinBound (n : ℕ) : ℝ` — the Robin bound e^γ · n · ln(ln(n)) - `lagariasBound (n : ℕ) : ℝ` — the Lagarias bound H_n + exp(H_n) · ln(H_n) - `robin_iff_RH : RiemannHypothesis ↔ ∀ n > 5040, σ₁(n) < robinBound n` - `lagarias_iff_RH : RiemannHypothesis ↔ ∀ n ≥ 1, σ₁(n) ≤ lagariasBound n` ### Status The **statements** are complete and use existing Mathlib primitives: - `ArithmeticFunction.sigma` for σ₁ - `Real.eulerMascheroniConstant` for γ - `harmonic` for H_n (with ℚ → ℝ coercion) - `RiemannHypothesis` from `Mathlib.NumberTheory.LSeries.RiemannZeta` The **proofs** are currently `sorry`. The Robin direction (RH → inequality) requires analytic number theory following Robin's original 1984 paper. The converse uses Gronwall's theorem on superior highly composite numbers. Both are substantial Mathlib projects in their own right. This PR establishes the formal statements as a foundation for future proof work. These equivalences are not currently formalized anywhere in Mathlib. ### References - G. Robin, *Grandes valeurs de la fonction somme des diviseurs et hypothèse de Riemann*, J. Math. Pures Appl. **63** (1984), 187–213. - J. Lagarias, *An elementary problem equivalent to the Riemann hypothesis*, Amer. Math. Monthly **109** (2002), 534–543. ### Note on `sorry` I'm aware Mathlib does not merge `sorry`-laden PRs in general. I'm submitting this as a draft to: 1. Get feedback on whether the statement formulation is idiomatic 2. Establish that these statements don't already exist in Mathlib under a different name 3. Invite collaboration on completing the proofs t-number-theory new-contributor 98/0 Mathlib/NumberTheory/LSeries/RobinInequality.lean 1 2 ['github-actions'] nobody
49-59791
1 month ago
unknown
0-0
0 seconds
36937 Yaohua-Leo
author:Yaohua-Leo
 feat(Algebra/Jordan): add first linearization lemmas for IsCommJordan [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) AI assistance disclosure: I used AI assistance for CI/debugging and module-structure fixes in this PR. The mathematical content and main lemmas were written by me, with help from @pelicanhere. This PR adds a new file `Mathlib/Algebra/Jordan/Linearization.lean` containing linearization lemmas for the commutative Jordan identity. Main declarations: * `IsCommJordan.four_nsmul_associator_mul_add` * `IsCommJordan.associator_mul_add` These lemmas formalize a first linearization of the commutative Jordan identity using `associator`, following McCrimmon, Proposition 1.8.5. --- I put these lemmas in a separate file because I expect follow-up linearization lemmas to belong naturally in the same place. I am also happy to rename declarations or move the file if reviewers would prefer. t-algebra new-contributor awaiting-author
label:t-algebra$
 60/0 Mathlib.lean,Mathlib/Algebra/Jordan/Linearization.lean 2 6 ['Yaohua-Leo', 'github-actions', 'grunweg', 'ocfnash'] ocfnash
assignee:ocfnash
49-39138
1 month ago
49-39138
49 days ago
13-10710
13 days
36813 AlexeyMilovanov
author:AlexeyMilovanov
 feat(Computability.Encoding): add self-delimiting unary and pair encodings Adds `unaryPrefix` (a self-delimiting $1^n 0$ code) and `prefixPair` to `Mathlib.Computability.Encoding`. **Key changes:** * **`unaryPrefix`**: A prefix-free unary encoding for $\mathbb{N}$, distinct from the existing `unaryEncodeNat`. * **`unaryPrefix_append_inj`**: A basic cancellation lemma that allows unique extraction of a unary prefix from a concatenated list. * **`prefixPair`**: A self-delimiting pairing function for boolean lists, defined as $\text{unaryPrefix } |x| \frown x \frown y$. * **`prefixPair_inj`**: A concise proof of pair injectivity leveraging the new prefix lemmas. t-computability new-contributor awaiting-author 56/1 Mathlib/Computability/Encoding.lean 1 2 ['Komyyy', 'github-actions'] Komyyy
assignee:Komyyy
48-66559
1 month ago
48-66559
48 days ago
16-42277
16 days
37644 matthunz
author:matthunz
 feat(Order/Causal): add `Causal` ordering for stream functions Adds `Causal` ordering for stream functions and related theorems: ```lean def Causal (f : Stream' α → Stream' β) : Prop := ∀ (x y : Stream' α) (t : ℕ), (∀ s, s ≤ t → x s = y s) → f x t = f y t ``` A stream function is causal if the output at time `t` depends only on inputs up to time `t`. Causal stream functions are commonly used in signal processing, reactive systems, and semantics of stateful computations, where outputs cannot depend on future inputs. ## Future work - Mealy machines: define Mealy machines as causal stream functions with state, and relate them to standard automata-theoretic constructions. - Feedback and delay operators: formalize feedback loops and delayed composition, enabling modeling of stateful and recursive stream definitions. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor t-order 79/0 Mathlib.lean,Mathlib/Order/Causal/Basic.lean,Mathlib/Order/Causal/Defs.lean 3 2 ['github-actions'] nobody
48-5622
1 month ago
unknown
0-0
0 seconds
37695 Morten-Ness
author:Morten-Ness
 refactor(GroupTheory/Complement): simplify complement proofs Simplifies the proofs of: - `Subgroup.IsComplement'.symm` - `Subgroup.isComplement_singleton_left` - `Subgroup.isComplement_singleton_right` No API changes. AI assistance: I used Codex/LLM suggestions as a starting point, then manually checked the proofs, and verified the final version locally. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-group-theory new-contributor awaiting-author 15/17 Mathlib/GroupTheory/Complement.lean 1 4 ['github-actions', 'tb65536'] tb65536
assignee:tb65536
45-47312
1 month ago
45-47312
45 days ago
0-68801
19 hours
37489 michael-novak-math
author:michael-novak-math
 feat: add the fundamental theorem of plane curves We add to the PlaneCurves file created in PR #36731 a classical result in the subject of differential geometry of plane curves: the fundamental theorem of plane curves. --------- - [ ] depends on: #36731 new-contributor t-differential-geometry t-analysis blocked-by-other-PR 651/0 Mathlib.lean,Mathlib/Analysis/InnerProductSpace/Calculus.lean,Mathlib/Geometry/PlaneCurves.lean,Mathlib/MeasureTheory/Integral/IntervalIntegral/FundThmCalculus.lean,docs/references.bib 5 5 ['github-actions', 'mathlib-dependent-issues', 'michael-novak-math'] nobody
45-37892
1 month ago
51-22748
51 days ago
0-13581
3 hours
37281 AltSoKoly
author:AltSoKoly
 Update EdgeConnectivity.lean --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-combinatorics new-contributor awaiting-author 123/0 Mathlib/Combinatorics/SimpleGraph/Connectivity/EdgeConnectivity.lean,Mathlib/Data/Int/GCD.lean 2 5 ['github-actions', 'grunweg', 'themathqueen'] nobody
44-26503
1 month ago
56-17266
56 days ago
0-432
7 minutes
37111 tannerduve
author:tannerduve
 feat(Computability): add Nat.PrimrecIn and PrimrecIn - Add `Nat.PrimrecIn`: primitive recursive functions relative to a set of oracles - Add `PrimrecIn`: lifts `Nat.PrimrecIn` to `Primcodable` types A `PrimrecIn` version of `RecursiveIn.iff_nat` (i.e., `PrimrecIn O (f : ℕ → ℕ) ↔ Nat.PrimrecIn O f`) is left as future work as it requires proving `Nat.PrimrecIn O Nat.pred`, which needs additional API for `Nat.PrimrecIn`. --- Split out from #34937 as requested in review. - [x] depends on: #37061 t-computability new-contributor awaiting-author 24/0 Mathlib/Computability/RecursiveIn.lean 1 14 ['Komyyy', 'bryangingechen', 'github-actions', 'mathlib-dependent-issues', 'mathlib-merge-conflicts', 'tannerduve'] nobody
42-5016
1 month ago
43-17875
43 days ago
1-79421
1 day
36763 alok
author:alok
 refactor(Order/Filter/Germ): partial sections for Filter.Product ## Summary - Refactor `Filter.Product` from total functions to partial sections (`Product.Section`) with filter-large domains - Adapt the model-theoretic `Prestructure` and Łoś's theorem proofs to partial sections - Add `Germ ↔ Product` bridge equivalence for constant families ## Motivation The current `Filter.Product` is a quotient of total functions `(a : α) → ε a` by eventual equality. This requires all fibers to be inhabited, which is not the mathematically correct construction. The ultraproduct should only require a section defined on a filter-large set. The new `Product.Section` structure carries: - A domain `dom : Set α` with `dom ∈ l` - A dependent section `val : (a : dom) → ε a` Two sections are equivalent if they agree on some filter-large common domain. This matches the standard mathematical construction and enables proper ultraproducts where some fibers may be empty. ## Changes ### `Mathlib/Order/Filter/Germ/Basic.lean` - New `Product.Section` structure (partial section with filter-large domain) - `productSetoid` redefined over `Product.Section` - `Product.ofTotal` embeds total sections; `eq_iff_ofTotal` characterizes equality ### `Mathlib/ModelTheory/Ultraproducts.lean` - `sectionStructure`: first-order structure on partial sections (funMap restricts to domain intersection, RelMap checks on common domain) - `setoidPrestructure` adapted with full proofs of `fun_equiv` and `rel_equiv` - `funMap_cast`, `boundedFormula_realize_cast` (rel case), `all` quantifier case all reproved for partial sections - Łoś's theorem statement unchanged; `sentence_realize` still has the same API ### `Mathlib/Order/Filter/Germ/Product.lean` (new) - `Germ.toProduct` / `Product.toGerm`: round-trip between germs and constant-family products - `Germ.prodEquiv`: equivalence for inhabited constant families (backward compat) ## Test plan - [x] `lake build` passes (7607/7607 modules) - [x] All linter warnings resolved - [x] `Mathlib.ModelTheory.Satisfiability` (uses `Filter.Product` + `sentence_realize`) still compiles - [x] `Mathlib.Analysis.Real.Hyperreal` still compiles --- Context: [Zulip discussion](https://leanprover.zulipchat.com/#narrow/channel/217875-Is-there-code-for-X.3F/topic/Nonstandard.20Analysis/near/513178715) — Violeta Hernández asked for fixing the ultraproduct definition as the first step after #33650 deprecated the old hyperreal machinery. 🤖 Generated with [Claude Code](https://claude.com/claude-code) new-contributor merge-conflict 278/49 Mathlib.lean,Mathlib/ModelTheory/Ultraproducts.lean,Mathlib/Order/Filter/Germ/Basic.lean,Mathlib/Order/Filter/Germ/Product.lean 4 5 ['alok', 'github-actions', 'mathlib-merge-conflicts', 'plp127'] nobody
41-85460
1 month ago
unknown
0-0
0 seconds
37954 jdhart81
author:jdhart81
 feat(Data/ENNReal/Inv): add ENNReal.div_mul_div_cancel Proves a / b * (b / c) = a / c for b ≠ 0, b ≠ ∞ in ENNReal. Proof via mul_div_assoc and existing div_mul_cancel. AI Disclosure: This PR was developed with assistance from an LLM (Claude, Anthropic) for proof exploration and text drafting. The proof was compiled and verified locally by the contributor, who understands the mathematical content. This lemma is extracted from a larger formalization of information-theoretic bounds (Zenodo DOI: 10.5281/zenodo.19317983). --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-data new-contributor 5/0 Mathlib/Data/ENNReal/Inv.lean 1 2 ['github-actions'] nobody
40-27875
1 month ago
40-27873
40 days ago
0-75
1 minute
36770 Xmask19
author:Xmask19
 feat: invariance of domain via Brouwer's fixed point theorem Continuous and injective maps from Rn to Rn are open mappings. This is shown given Brouwer's fixed point theorem. The specific version of Brouwer's theorem assumed is that a continuous map from the closed unit ball to itself has a fixed point. It is used to show a lemma in this proof. Then assuming that invariance of domain isn't true gives a contradiction with this lemma. --- My supervisor has code for studying topological manifolds which relies on invariance of domain that can be found here: https://github.com/stevensivek/TopologicalManifolds and is planned to be submitted to Mathlib. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-topology new-contributor 617/5 Mathlib.lean,Mathlib/AlgebraicTopology/InvarianceOfDomain.lean,Mathlib/Analysis/Convex/GaugeRescale.lean,Mathlib/Topology/Closure.lean,Mathlib/Topology/Order.lean 5 2 ['github-actions'] nobody
37-12137
1 month ago
37-12113
37 days ago
0-6926
1 hour
38050 WilliamCoram
author:WilliamCoram
 feat: Define Newton polygons In this file we construct a method to define newton polygons using a Stream' of `Step`'s which correspond to what you would obtain via the 'algorithm' of rotating half-planes as described in Gouvea's p-adic numbers. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-number-theory new-contributor 620/0 Mathlib.lean,Mathlib/NumberTheory/NewtonPolygon.lean 2 3 ['github-actions', 'jcommelin'] nobody
37-2183
1 month ago
unknown
0-0
0 seconds
38113 robo7179
author:robo7179
 feat(SimpleGraph/PerfectGraph): add lemma graph is perfect iff all su… Perfect graph theorem , discussion on zulip thread: [#graph theory > Second Order Monadic Logic](https://leanprover.zulipchat.com/#narrow/channel/252551-graph-theory/topic/Second.20Order.20Monadic.20Logic.20for.20Graph/with/583013775) - [ ] depends on: #37680 - [ ] depends on: #37598 t-combinatorics new-contributor blocked-by-other-PR 54/0 Mathlib/Combinatorics/SimpleGraph/PerfectGraph.lean 1 3 ['github-actions', 'mathlib-dependent-issues'] nobody
36-36902
1 month ago
36-38261
36 days ago
0-69
1 minute
37938 SamuelSchlesinger
author:SamuelSchlesinger
 feat(Probability/Posterior): Posterior PMFs and Various Lemmas Upstreaming the probability lemmas needed in https://github.com/leanprover/cslib/pull/464. t-measure-probability new-contributor awaiting-author 130/0 Mathlib.lean,Mathlib/Probability/ProbabilityMassFunction/Posterior.lean 2 6 ['EtienneC30', 'SamuelSchlesinger', 'github-actions'] RemyDegenne
assignee:RemyDegenne
35-84645
1 month ago
37-31686
37 days ago
0-4092
1 hour
38139 sidbedi
author:sidbedi
 chore(Algebra/MvPolynomial/Variables): golf MvPolynomial.vars_0 to rfl --- The classical qualifier and explicit rewrite chain are unnecessary — the result holds definitionally. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor t-algebra awaiting-author
label:t-algebra$
 1/2 Mathlib/Algebra/MvPolynomial/Variables.lean 1 3 ['github-actions', 'grunweg'] nobody
35-42705
1 month ago
35-42705
35 days ago
0-34567
9 hours
38140 sidbedi
author:sidbedi
 chore(Data/Analysis/Filter): golf CFilter.ofEquiv_val to rfl --- cases F is unnecessary, the result holds definitionally. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-data new-contributor awaiting-author 1/2 Mathlib/Data/Analysis/Filter.lean 1 3 ['github-actions', 'grunweg'] nobody
35-42661
1 month ago
35-42661
35 days ago
0-34488
9 hours
36731 michael-novak-math
author:michael-novak-math
 feat: Frénet moving frame and Frénet equation for plane curves We define the curvature function, normal vector function and the Frénet moving frame for plane curve. We also prove the Frénet equations for plane curves. A separate PR (#37489) will prove the fundamental theorem of plane curves. new-contributor t-differential-geometry t-analysis awaiting-author 321/0 Mathlib.lean,Mathlib/Analysis/InnerProductSpace/Calculus.lean,Mathlib/Geometry/PlaneCurves.lean,Mathlib/MeasureTheory/Integral/IntervalIntegral/FundThmCalculus.lean,docs/references.bib 5 114 ['Ruben-VandeVelde', 'github-actions', 'grunweg', 'michael-novak-math', 'scholzhannah'] nobody
35-36642
1 month ago
48-14265
48 days ago
12-40134
12 days
37683 SabrinaJewson
author:SabrinaJewson
 feat(Order/OrdContinuous): every map between complete lattices that preserves sSup is a left adjoint of some Galois connection It is already proven that the left side of a Galois connection is left-continuous; this provides the converse. --- - [ ] depends on: #37682 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor blocked-by-other-PR merge-conflict t-order 90/136 Mathlib/Order/ConditionallyCompleteLattice/Basic.lean,Mathlib/Order/ConditionallyCompletePartialOrder/Defs.lean,Mathlib/Order/OrdContinuous.lean,Mathlib/Order/SemiconjSup.lean,Mathlib/Tactic/Translate/ToDual.lean,Mathlib/Topology/Order/Basic.lean 6 4 ['github-actions', 'mathlib-dependent-issues', 'mathlib-merge-conflicts'] nobody
35-17269
1 month ago
46-72561
46 days ago
0-1447
24 minutes
37684 SabrinaJewson
author:SabrinaJewson
 feat(Topology/Order): provide lemmas linking topological continuity to order continuity All the hard work is already done, but this just fills in a couple convenient missing pieces. --- - [ ] depends on: #37682 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor blocked-by-other-PR merge-conflict t-topology 106/136 Mathlib/Order/ConditionallyCompleteLattice/Basic.lean,Mathlib/Order/ConditionallyCompletePartialOrder/Defs.lean,Mathlib/Order/OrdContinuous.lean,Mathlib/Order/SemiconjSup.lean,Mathlib/Tactic/Translate/ToDual.lean,Mathlib/Topology/Order/Basic.lean,Mathlib/Topology/Order/IsLUB.lean,Mathlib/Topology/Order/Monotone.lean 8 4 ['github-actions', 'mathlib-dependent-issues', 'mathlib-merge-conflicts'] nobody
35-17258
1 month ago
46-72562
46 days ago
0-1299
21 minutes
37376 NoneMore
author:NoneMore
 feat(Topology/CantorBendixson): add iterated derived sets and perfect kernel Define the transfinite iteration of the relative derived-set operator via `gfpApprox` and introduce the perfect kernel of a set. --- AI disclosure: Most declarations, comments, and documentation in this PR were generated with Codex. Some proofs were structurally simplified using the `/golf` command from Lean 4 Skills. I reviewed the resulting code and documentation and can vouch for all submitted content. - [ ] depends on: #37374 - [x] depends on: #37375 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor blocked-by-other-PR t-topology 249/0 Mathlib.lean,Mathlib/SetTheory/Ordinal/FixedPointApproximants.lean,Mathlib/Topology/CantorBendixson.lean,Mathlib/Topology/DerivedSet.lean 4 4 ['github-actions', 'mathlib-dependent-issues', 'mathlib-merge-conflicts'] nobody
35-17227
1 month ago
53-24959
53 days ago
0-832
13 minutes
38154 ybenmeur
author:ybenmeur
 add subsingleton case to ExpChar --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra new-contributor
label:t-algebra$
 113/49 Mathlib/Algebra/CharP/Algebra.lean,Mathlib/Algebra/CharP/Basic.lean,Mathlib/Algebra/CharP/Defs.lean,Mathlib/Algebra/CharP/Lemmas.lean,Mathlib/Algebra/CharP/Subring.lean,Mathlib/Algebra/Polynomial/Expand.lean,Mathlib/FieldTheory/Perfect.lean,Mathlib/FieldTheory/PurelyInseparable/Exponent.lean,Mathlib/FieldTheory/SeparableDegree.lean,Mathlib/FieldTheory/SeparablyGenerated.lean,Mathlib/RingTheory/MvPolynomial/Basic.lean,Mathlib/RingTheory/MvPowerSeries/Expand.lean,Mathlib/RingTheory/Polynomial/Basic.lean,Mathlib/RingTheory/Polynomial/SeparableDegree.lean,Mathlib/RingTheory/Trace/Basic.lean 15 2 ['github-actions'] nobody
34-25027
1 month ago
unknown
0-0
0 seconds
37593 IlPreteRosso
author:IlPreteRosso
 refactor(Data.Finset.*Antidiagonal): rename set-based defs to `set*Antidiagonal` Renames set-based `Finset.mulAntidiagonal` → `setMulAntidiagonal` (and SMul/VAdd variants) to free the `mulAntidiagonal` name for the planned `HasMulAntidiagonal` typeclass. Deprecation aliases added. Supersedes #34551 t-ring-theory new-contributor merge-conflict 178/96 Mathlib/Algebra/Order/Antidiag/Prod.lean,Mathlib/Data/Finset/MulAntidiagonal.lean,Mathlib/Data/Finset/SMulAntidiagonal.lean,Mathlib/RingTheory/HahnSeries/Multiplication.lean,Mathlib/RingTheory/HahnSeries/PowerSeries.lean,Mathlib/RingTheory/HahnSeries/Summable.lean 6 3 ['github-actions', 'mathlib-merge-conflicts'] nobody
33-55054
1 month ago
33-55055
33 days ago
15-61521
15 days
38270 Deicyde
author:Deicyde
 feat(Geometry/Manifold): The Tangent Functor on `MfldCat` A simple motivating example for PR #38223. We define the `tangentFunctor : MfldCat 𝕜 (n + 1) ⥤ MfldCat 𝕜 n` which takes any manifold to its tangent bundle and any smooth map to its pushforward. This is a standard construction in differential geometry. See: J. Lee, Smooth Manifolds, pg. 75 --- - [ ] depends on: #38223 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-differential-geometry blocked-by-other-PR new-contributor 320/0 Mathlib.lean,Mathlib/Geometry/Manifold/Category/MfldCat/Basic.lean,Mathlib/Geometry/Manifold/Category/MfldCat/TangentFunctor.lean,Mathlib/Geometry/Manifold/ContMDiffMap.lean 4 3 ['github-actions', 'mathlib-dependent-issues'] nobody
32-68110
1 month ago
unknown
0-0
0 seconds
38053 ntapiam
author:ntapiam
 feat(Analysis/Controls): add Control functions Add Control functions ---- This PR adds Control functions in the sense of rough paths theory (see e.g. [Friz-Victoir, Section 1.2.1](https://page.math.tu-berlin.de/~friz/master4_May6th.pdf)). They are related to p-variation norms which are the goal of #38055. I've shown most results in the above reference though those relating to 1-variation are still a work in progress. I had to add a few statements about convex functions in order to work over NNReal instead or Real, but I am not sure this is the best way to do it. The reason is that I've defined controls as taking values in NNReal (as they should). In particular there is ```lean4 theorem nnreal_of_real {f : ℝ≥0 → ℝ≥0} (hf : ConvexOn ℝ (Set.Ici 0) fun x : ℝ => (f x.toNNReal : ℝ)) : ConvexOn ℝ≥0 ⊤ f ``` which I didn't know where to put. It probably holds in more generality but I didn't check. I have also included two versions of Controls, one global and one restricted to a set. I tried to follow Mathlib conventions as best as I could but perhaps that could be improved as well. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) WIP t-analysis new-contributor 571/1 Mathlib.lean,Mathlib/Analysis/Controls/BoundedVariation.lean,Mathlib/Analysis/Controls/ControlOn.lean,Mathlib/Analysis/Controls/Defs.lean,Mathlib/Analysis/Convex/Function.lean,docs/references.bib 6 4 ['github-actions', 'ntapiam'] nobody
32-37158
1 month ago
38-2341
38 days ago
0-52
52 seconds
37964 mortarsanjaya
author:mortarsanjaya
 feat(Algebra/Order/Floor): weaken assumptions on theorems about `FloorRing` This PR weakens as much assumptions as possible on theorems about `FloorSemiring` and `FloorRing`. Mainly, `IsOrderedRing` and `IsStrictOrderedRing` are weakened to just `IsOrderedAddMonoid` or removed completely from the assumptions on the theorems. Most theorems can be generalized as is or only requires a minor modification of replacing lemmas about casting naturals/integers preserving order (the likes of `Nat.cast_le`, `Int.cast_lt`, etc.) with the corresponding version for `FloorRing`. Some other lemmas require modification in the proofs, but these changes shorten the proofs. The new proof of the theorem `Int.mul_cast_floor_div_cancel_of_pos` requires an extra import. The assumption `IsOrderedAddMonoid` is required on lemmas that involve comparison + addition, and `IsOrderedRing` is required only on lemmas that involve comparison + multiplication of two non-integer elements. --- - [ ] depends on: #37714 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra new-contributor blocked-by-other-PR
label:t-algebra$
 349/266 Mathlib/Algebra/ContinuedFractions/Computation/Approximations.lean,Mathlib/Algebra/ContinuedFractions/Computation/TerminatesIffRat.lean,Mathlib/Algebra/Order/Floor/Defs.lean,Mathlib/Algebra/Order/Floor/Ring.lean,Mathlib/Algebra/Order/Floor/Semiring.lean,Mathlib/Algebra/Order/Round.lean,Mathlib/Data/Int/Log.lean,Mathlib/Data/Rat/Floor.lean,Mathlib/Topology/Algebra/Order/Floor.lean 9 4 ['github-actions', 'mathlib-dependent-issues', 'mathlib-merge-conflicts'] nobody
30-78109
1 month ago
39-79477
39 days ago
0-3854
1 hour
37279 imalinowskip
author:imalinowskip
 feat(Probability): multivariate CLT (and Cramèr-Wold) --- - [x] depends on: #36208 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor t-measure-probability awaiting-author large-import 500/1 Mathlib.lean,Mathlib/Probability/CentralLimitTheorem.lean,Mathlib/Probability/CramerWold.lean 3 10 ['EtienneC30', 'github-actions', 'imalinowskip', 'mathlib-dependent-issues', 'mathlib-merge-conflicts'] RemyDegenne
assignee:RemyDegenne
30-6702
1 month ago
43-31788
43 days ago
5-65208
5 days
38399 openendings
author:openendings
 feat: OrderHom.instOrderSupSet for LawfulSup Currently we have `instance [CompleteLattice β] : SupSet (α →o β)`. We replace this with a mere `LawfulSup` assumption such as #38328, . TODO: - [ ] construct an `OrderSupSet` instance instead of `SupSet` --- WIP - [ ] depends on: #38328 [or other `LawfulSup`] (based on master in case something else needs this) [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) WIP t-order new-contributor blocked-by-other-PR 26/0 Mathlib/Order/Hom/Order.lean 1 5 ['github-actions', 'mathlib-bors', 'mathlib-dependent-issues', 'openendings'] nobody
29-57010
29 days ago
29-59854
29 days ago
0-106
1 minute
38388 supermanG
author:supermanG
 feat(Combinatorics/SimpleGraph): add ballFinset with basic identities Introduces `SimpleGraph.ballFinset`, the `Finset` companion to `SimpleGraph.ball` (#36443) on graphs with a `Fintype` vertex set, together with the basic identities `mem_ballFinset`, `ballFinset_zero`, and `ballFinset_one`. `SimpleGraph.ball` is the *open* metric ball `{u | edist u c < r}` and is indexed by `ℕ∞`; `ballFinset` is typed `ℕ → Finset V` for ergonomics at cardinality-facing call sites. The classical closed-ball cardinality at radius `r`, `|{u | edist u c ≤ r}|`, corresponds to `|ballFinset v (r + 1)|` in this setup. Opened as draft so CI can run before pinging maintainers. --- First-time Mathlib contribution — happy to adjust naming, file placement, or docstring style to match house conventions. Follow-up PRs will add cardinality envelopes (sphere cardinality, geometric-series bound, polynomial bound). t-combinatorics new-contributor LLM-generated 68/0 Mathlib.lean,Mathlib/Combinatorics/SimpleGraph/BallCardinality.lean 2 3 ['SnirBroshi', 'github-actions'] nobody
29-23060
29 days ago
unknown
0-0
0 seconds
36853 matthunz
author:matthunz
 feat(CategoryTheory/Monoidal/Braded/Traced): add `TracedCategory` class Adds a `TracedCategory` class following [A. Joyal and R. Street and D. R. Verity, *Traced monoidal categories*](https://www.cambridge.org/core/journals/mathematical-proceedings-of-the-cambridge-philosophical-society/article/abs/traced-monoidal-categories/2BE85628D269D9FABAB41B6364E117C8#article): ```lean /-- A traced symmetric monoidal category. -/ class TracedCategory (C : Type u) [Category.{v} C] [MonoidalCategory.{v} C] [SymmetricCategory.{v} C] where /-- The trace operator. -/ trace : ∀ {A B : C} (W : C), (A ⊗ W ⟶ B ⊗ W) → (A ⟶ B) /-- Left tightening: sliding a morphism past the trace on the left. -/ trace_naturality_left : ∀ {A A' B : C} (W : C) (f : A' ⟶ A) (g : A ⊗ W ⟶ B ⊗ W), trace W (f ▷ W ≫ g) = f ≫ trace W g := by cat_disch /-- Right tightening: sliding a morphism past the trace on the right. -/ trace_naturality_right : ∀ {A B B' : C} (W : C) (f : A ⊗ W ⟶ B ⊗ W) (g : B ⟶ B'), trace W (f ≫ g ▷ W) = trace W f ≫ g := by cat_disch /-- Sliding: an endomorphism on the feedback wire slides past the trace. -/ trace_dinaturality : ∀ {A B W : C} (f : A ⊗ W ⟶ B ⊗ W) (h : W ⟶ W), trace W (f ≫ B ◁ h) = trace W (A ◁ h ≫ f) := by cat_disch /-- Superposing: trace commutes with left tensoring by a bystander object. -/ trace_superposing : ∀ {A B : C} (C' W : C) (f : A ⊗ W ⟶ B ⊗ W), C' ◁ trace W f = trace W ((α_ C' A W).hom ≫ C' ◁ f ≫ (α_ C' B W).inv) := by cat_disch /-- Vanishing I: trace over the tensor unit is the morphism itself (up to unitors). -/ trace_vanishing_one : ∀ {A B : C} (f : A ⊗ 𝟙_ C ⟶ B ⊗ 𝟙_ C), trace (𝟙_ C) f = (ρ_ A).inv ≫ f ≫ (ρ_ B).hom := by cat_disch /-- Vanishing II: trace over a tensor product equals iterated trace. -/ trace_vanishing_two : ∀ {A B X Y : C} (f : A ⊗ (X ⊗ Y) ⟶ B ⊗ (X ⊗ Y)), trace (X ⊗ Y) f = trace X (trace Y ((α_ A X Y).hom ≫ f ≫ (α_ B X Y).inv)) := by cat_disch /-- Yanking: the trace of the braiding is the identity. -/ trace_yanking : ∀ (W : C), trace W (β_ W W).hom = 𝟙 W := by cat_disch ``` ## Motivation `TracedCategory` can be used for denoting things like electric circuits, which require a traced symmetric monoidal category for the wire graph network. ## Future work - `instance [CompactClosedCategory C] : TracedCategory C` - possible notation such as `Tr_[W] f` --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-category-theory new-contributor awaiting-author merge-conflict 237/0 Mathlib.lean,Mathlib/CategoryTheory/Monoidal/Braided/Traced.lean,Mathlib/CategoryTheory/Monoidal/Rigid/Traced.lean,docs/references.bib 4 5 ['dagurtomas', 'github-actions', 'mathlib-merge-conflicts', 'matthunz'] nobody
28-17159
28 days ago
64-6722
64 days ago
0-25956
7 hours
38344 robo7179
author:robo7179
 feat(SimpleGraph/Coloring/VertexColoring): Matching is 2 colorable --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-combinatorics new-contributor 51/0 Mathlib/Combinatorics/SimpleGraph/Coloring/VertexColoring.lean 1 5 ['SnirBroshi', 'github-actions', 'vlad902'] nobody
27-39422
27 days ago
31-6966
31 days ago
31-7064
31 days
38546 yhx-12243
author:yhx-12243
 fix: universe issue in injective module Change the definition of ```lean class Module.Injective : Prop where out : ∀ ⦃X Y : Type v⦄ [AddCommGroup X] [AddCommGroup Y] [Module R X] [Module R Y] (f : X →ₗ[R] Y) (_ : Function.Injective f) (g : X →ₗ[R] Q), ∃ h : Y →ₗ[R] Q, ∀ x, h (f x) = g x ``` into ```lean class Module.Injective : Prop where out : ∀ ⦃X Y : Type u⦄ [AddCommGroup X] [AddCommGroup Y] [Module R X] [Module R Y] (f : X →ₗ[R] Y) (_ : Function.Injective f) (g : X →ₗ[R] Q), ∃ h : Y →ₗ[R] Q, ∀ x, h (f x) = g x ``` to make it agree with `Module.Baer` and real mathematical definition, **without universe issues**. Since the criterion `Module.Flat` also uses `Type u` on testing modules. See discussions in https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/Universe.20issue.20about.20injective.20module . --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra new-contributor awaiting-zulip
label:t-algebra$
 57/43 Mathlib/Algebra/Category/ModuleCat/Injective.lean,Mathlib/Algebra/Category/ModuleCat/Ulift.lean,Mathlib/Algebra/Module/Injective.lean,Mathlib/RepresentationTheory/FinGroupCharZero.lean,Mathlib/RingTheory/Flat/Tensor.lean,Mathlib/RingTheory/LocalProperties/Injective.lean 6 5 ['github-actions', 'grunweg', 'mathlib-bors', 'wwylele'] nobody
26-3857
26 days ago
26-3868
26 days ago
0-26133
7 hours
36850 whocares-abt
author:whocares-abt
 feat(Combinatorics/SimpleGraph/Acyclic): deleting leaves from a tree gives a tree Added theorem stating Deleting a leaf from a tree produces a tree. t-combinatorics new-contributor awaiting-author 5/0 Mathlib/Combinatorics/SimpleGraph/Acyclic.lean 1 9 ['YaelDillies', 'github-actions', 'vlad902'] YaelDillies
assignee:YaelDillies
25-48437
25 days ago
25-48547
25 days ago
38-73648
38 days
37774 weisbrja
author:weisbrja
 fix: change variables in `bicompl` to `Sort*` and add missing theorem mentioned in `bicompl` docs [#mathlib4 > Why does Mathlib use Type* instead of Sort* in some places?](https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/Why.20does.20Mathlib.20use.20Type.2A.20instead.20of.20Sort.2A.20in.20some.20places.3F/with/583882342) --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor t-logic merge-conflict 6/1 Mathlib/Logic/Function/Basic.lean 1 8 ['github-actions', 'kbuzzard', 'leanprover-radar', 'mathlib-merge-conflicts', 'weisbrja'] nobody
25-11564
25 days ago
25-11565
25 days ago
19-76858
19 days
37445 edwin1729
author:edwin1729
 feat(Topology/Order): set of compact elements, generating basic opens contained in a `Locale.PT`, is directed This is (2/4) PRs culminating in a proof that "Scott Topologies over Algebraic DCPOs are Sober". In this PR we prove properties of a certain set of compact elements, w.r.t a `Locale.PT`. A `Locale.PT` can be thought of as a set of `Opens`. Precisely it is a Frame homomorphism from `Opens _` to `Prop` so we are essentially choosing certain `Opens` to form our set and this set has additional properties. Namely it is a completely prime filter: if the supremum of some Opens is contained than atleast one of the Opens must be contained. Take some `Locale.PT`, `x`. In this PR, we prove that the set of compact elements generating basic opens (compact elements generate topological basis see #31662) contained in `x` is directed. This set of compact elements defined above is important in subsequent parts of the proof since it fully determines `x`. - [ ] depends on: #31662 --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-topology blocked-by-other-PR new-contributor merge-conflict 296/1 Mathlib.lean,Mathlib/Topology/Order/ScottTopology.lean,Mathlib/Topology/Order/ScottTopologyDCPO.lean,docs/references.bib 4 4 ['github-actions', 'mathlib-dependent-issues', 'mathlib-merge-conflicts'] nobody
24-80886
24 days ago
52-18964
52 days ago
0-463
7 minutes
37556 edwin1729
author:edwin1729
 feat(Topology/Order): Locale.localePointOfSpacePoint if we have a Scott Topology from an Algebraic DCPO (3/4) in a series of PRs proving that "Scott Topologies over Algebraic DCPOs are Sober" We prove here that the unit of the adjunction from `TopCat` to `Locale` defined in `Topology/Order/Category/FrameAdjunction.lean` is a surjective mapping, under the following condition: The underlying TopologicalSpace must be a Scott Topology generated with an underlying Algebraic DCPO structure. - [ ] depends on: #37445 --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-topology new-contributor blocked-by-other-PR merge-conflict 393/1 Mathlib.lean,Mathlib/Topology/Order/ScottTopology.lean,Mathlib/Topology/Order/ScottTopologyDCPO.lean,docs/references.bib 4 5 ['github-actions', 'mathlib-dependent-issues', 'mathlib-merge-conflicts'] nobody
24-80885
24 days ago
50-18985
50 days ago
0-1300
21 minutes
38027 8e7
author:8e7
 feat(Combinatorics/SimpleGraph/Star): define star graphs Add a new definition `starGraph` and several key lemmas. Star graphs are a trivial class of tree, often used in constructive proofs regarding trees. An example use case is shown in #38334. --- All lemmas are hand written first, then golfed with the help of Claude Code. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-combinatorics new-contributor 85/0 Mathlib.lean,Mathlib/Combinatorics/SimpleGraph/Star.lean 2 39 ['8e7', 'IvanRenison', 'JovanGerb', 'SnirBroshi', 'github-actions', 'vihdzp', 'vlad902'] nobody
24-67415
24 days ago
36-67361
36 days ago
38-65338
38 days
38560 Deicyde
author:Deicyde
 feat(Geometry/Manifold): `MfldCat` is a `CartesianMonoidalCategory` We prove that the category `MfldCat` of C^n manifolds is a Cartesian monoidal category, and also derive the `BraidedCategory` instance. This PR introduces a new file `Geometry/Manifold/Category/MfldCat/CartesianMonoidal` closely mirroring the structure of `Algebra/Category/Grp/CartesianMonoidal.lean` --- - [ ] depends on: #38223 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-differential-geometry blocked-by-other-PR new-contributor 281/0 Mathlib.lean,Mathlib/Geometry/Manifold/Category/MfldCat/Basic.lean,Mathlib/Geometry/Manifold/Category/MfldCat/CartesianMonoidal.lean,Mathlib/Geometry/Manifold/ContMDiffMap.lean 4 3 ['github-actions', 'mathlib-dependent-issues'] nobody
24-54131
24 days ago
unknown
0-0
0 seconds
38364 openendings
author:openendings
 feat: create Order/DirectedCompletePartialOrder/Defs.lean Define DirectedCompletePartialOrder and its interaction with iSup and sSup. --- A DirectedCompletePartialOrder is equivalently: - a partial order with LUBs of nonempty directed sets; - what happens when you remove ⊥ from a CompletePartialOrder; or - a ConditionallyCompletePartialOrder in which every directed set is BddAbove. Like CPOs, DCPOs are commonly studied in denotational semantics. Potential applications: - [#Is there code for X? > Summing `ENat`s without topology](https://leanprover.zulipchat.com/#narrow/channel/217875-Is-there-code-for-X.3F/topic/Summing.20.60ENat.60s.20without.20topology/with/590070848) -- defining infinite sums in an DCPO-enriched `AddCommMonoidWithTop` such as `ENat` or `ENNReal`. - [#Is there code for X? > Scott Induction](https://leanprover.zulipchat.com/#narrow/channel/217875-Is-there-code-for-X.3F/topic/Scott.20Induction/with/590112858) -- fixpoint theorems similar to `OmegaCompletePartialOrder`, generalised to arbitrary cardinalities. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-order new-contributor 123/0 Mathlib.lean,Mathlib/Order/DirectedCompletePartialOrder/Defs.lean,docs/references.bib 3 4 ['SnirBroshi', 'github-actions', 'openendings'] nobody
23-83678
23 days ago
29-73798
29 days ago
30-48336
30 days
37814 sglasman
author:sglasman
 feat: Equivalence between HopfAlgCat R and Hopf (ModuleCat R) This PR resolves a TODO by demonstrating an equivalence of categories between two models of the category of Hopf algebras over a commutative ring R, that of Hopf objects in the module category of R and that of types with a `HopfAlgebra R` instance. --- AI declaration: I consulted with Claude on proof strategies. The proofs were ultimately written by me. new-contributor large-import t-category-theory WIP 214/4 Mathlib/CategoryTheory/Monoidal/Hopf_.lean,Mathlib/RingTheory/HopfAlgebra/Basic.lean 2 5 ['dagurtomas', 'github-actions', 'robin-carlier', 'sglasman'] kim-em
assignee:kim-em
23-58649
23 days ago
29-21112
29 days ago
14-69757
14 days
38635 Fieldnote-Echo
author:Fieldnote-Echo
 chore(scripts): handle simple to_additive deprecations Closes #38550. This updates `scripts/add_deprecations.sh` so that, when a renamed declaration is near an existing `@[to_additive]` attribute, the script also emits the additive deprecation alias in the common default-name case. For example, `foo_mul -> bar_mul` now produces: ```lean @[deprecated (since := "...")] alias foo_add := bar_add @[to_additive existing, deprecated (since := "...")] alias foo_mul := bar_mul ``` This is intentionally conservative and text-based, matching the existing script. It handles common name translations such as mul/add, prod/sum, one/zero, inv/neg, and div/sub, and skips cases that look like they need less common to_additive name generation. Tested with a local six-case fixture and a scratch Lean file confirming that the generated alias form compiles and produces deprecation warnings for both names. I opened this as draft because I still count as a new contributor under the LLM-assisted PR policy. I have one merged mathlib PR (#36443), and this is a one-file script patch that I reviewed/tested manually. I'll leave it as draft unless a maintainer gives it the green light to flip ready. I used Claude assistance while drafting and testing the patch. I reviewed the final diff manually and tested the generated Lean form locally. CI new-contributor 121/10 scripts/add_deprecations.sh 1 4 ['Fieldnote-Echo', 'SnirBroshi', 'github-actions'] kim-em
assignee:kim-em
22-59744
22 days ago
unknown
0-0
0 seconds
38390 mortarsanjaya
author:mortarsanjaya
 feat(Data/Nat/Cast/Order/Basic): introduce new class `IsMonotoneNatCast` The class says that `Nat.cast` is monotone in an `AddMonoidWithOne`. Basically, we use this class when we only care about comparing the elements of a monoid that comes from the `Nat`s (so we do not have to care about the compatibility between the additive structure of the monoid and its order structure). --- Other than that, I'm also reorganizing some section naming, and I change the proof of the `Nontrivial` instance at the bottom to using `NeZero.nontrivial`. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-data new-contributor 28/18 Mathlib/Data/Nat/Cast/Order/Basic.lean 1 7 ['github-actions', 'leanprover-radar', 'mathlib-bors', 'mortarsanjaya', 'vihdzp'] nobody
21-84847
21 days ago
21-84848
21 days ago
7-85443
7 days
37819 YellPika
author:YellPika
 feat(Order/OmegaCompletePartialOrder): add `OmegaCompletePartialOrder` instance for `WithBot` with basic `ωScottContinuous` lemmas This is a modification of #34093. See #34093 for details. --- - [x] depends on: #33941 - [x] depends on: #37258 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor t-order merge-conflict 337/10 Mathlib/Algebra/Order/Ring/WithTop.lean,Mathlib/Analysis/BoxIntegral/Box/Basic.lean,Mathlib/Order/Monotone/Basic.lean,Mathlib/Order/OmegaCompletePartialOrder.lean,Mathlib/Order/TypeTags.lean,Mathlib/Order/WithBot.lean 6 5 ['Komyyy', 'github-actions', 'mathlib-dependent-issues', 'mathlib-merge-conflicts'] Komyyy
assignee:Komyyy
21-62025
21 days ago
21-62025
21 days ago
22-11204
22 days
38056 Deicyde
author:Deicyde
 feat: topological vector bundle homomorphisms This PR implements topological vector bundle morphisms. - [ ] depends on: #38023 - [ ] depends on: #37946 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor t-topology merge-conflict 805/0 Mathlib/Analysis/Normed/Module/FiniteDimension.lean,Mathlib/Topology/FiberBundle/Basic.lean,Mathlib/Topology/FiberBundle/Trivialization.lean,Mathlib/Topology/VectorBundle/Basic.lean,Mathlib/Topology/VectorBundle/Morphism.lean 5 4 ['github-actions', 'mathlib-dependent-issues', 'mathlib-merge-conflicts'] nobody
21-7870
21 days ago
unknown
0-0
0 seconds
38316 tannerduve
author:tannerduve
 feat(Order/OmegaCompletePartialOrder): least fixed point and Scott induction Adds `ContinuousHom.lfp` for endomorphisms on an ωCPO with `⊥`, as the `ωSup` of the iterate chain from `⊥`, together with `map_lfp`, `isFixedPt_lfp`, `lfp_le_fixed`, `isLeast_lfp`, and the Scott induction theorem `lfp_induction` (specialized from a more general seed-based `ωSup_iterate_induction`). For `Part.fix`, adds: * `Part.exists_mem_approx_of_mem_fix`: if `y ∈ Part.fix g x`, some finite approximation of `g` already contains `y`. * `Part.Fix.approx_eq_iterate_bot` and `Part.Fix.approxChain_eq_iterateChain`: bridges between `Fix.approx`/`approxChain` and `f^[n] ⊥`/`iterateChain`. * `Part.fix_eq_lfp`: `Part.fix g = ContinuousHom.lfp (.ofFun g hc)` when `g` is ω-Scott continuous. * `Part.fix_scott_induction`: Scott induction specialized to `Part.fix`. * `Part.fix_induction_mem`: membership induction on `Part.fix`, derived from `fix_scott_induction`. new-contributor 114/0 Mathlib/Control/LawfulFix.lean,Mathlib/Order/OmegaCompletePartialOrder.lean,docs/references.bib 3 2 ['github-actions'] nobody
20-13758
20 days ago
31-76260
31 days ago
31-76498
31 days
38871 0xTerencePrime
author:0xTerencePrime
 feat(Combinatorics/SimpleGraph): add parity lemmas for outer and inner vertices Adds three lemmas to `SimpleGraph.DegreeSum`: - `sum_degrees_option_zmod_two`: the handshaking lemma for `Option I` over ZMod 2 - `degree_none_zmod_two_eq_sum`: simp-normal form of the above - `card_degree_one_option_eq_outer_zmod_two`: under degree bound ≤ 2, count of degree-1 inner vertices equals outer vertex degree mod 2 t-combinatorics new-contributor 65/3 Mathlib/Combinatorics/SimpleGraph/DegreeSum.lean 1 6 ['0xTerencePrime', 'SnirBroshi', 'github-actions'] nobody
18-63243
18 days ago
19-33471
19 days ago
19-33183
19 days
38897 0xTerencePrime
author:0xTerencePrime
 feat(Combinatorics/SetFamily): formalize 1D Sperner's Lemma parity Formalizes the 1-dimensional Sperner's Lemma (parity version): given a coloring of the `n + 1` vertices of a subdivided line segment with two colors (`ZMod 2`), if the two endpoints have different colors, then the number of color-changing edges is odd. This is **distinct** from `IsAntichain.sperner` in `SetFamily.LYM`, which concerns antichains in a power set. This file formalizes the topological/combinatorial parity statement used as the base case in higher-dimensional Sperner arguments. ## Key declarations - `SpernerColoring`: type-safe coloring via `Fin (n + 1) → ZMod 2` - `edgeDiff`: color difference on adjacent vertices, computed in `ZMod 2` - `totalDiff`: telescoping sum of all edge differences - `diffEdges`: the `Finset` of bichromatic (color-changing) edges - `sperner_1d`: main theorem — `Odd (diffEdges c).card` ## Design notes - Using `Fin (n + 1) → ZMod 2` instead of `ℕ → ZMod 2` makes boundary conditions unrepresentable at the type level, eliminating out-of-bounds cases entirely. - The proof reduces to a telescoping sum in `ZMod 2`, using `CharTwo.add_self_eq_zero` to cancel all interior vertices, avoiding parity case splits. This is intended as the 1D base case, the approach generalizes to higher-dimensional Sperner's Lemma in future work. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-combinatorics new-contributor 133/0 Mathlib.lean,Mathlib/Combinatorics/SetFamily/Sperner1D.lean 2 3 ['github-actions', 'grunweg'] nobody
18-54477
18 days ago
18-64627
18 days ago
18-64339
18 days
38750 openendings
author:openendings
 feat(Data/Nat): add padicValNat_add_eq_min Add lemmas for `padicValNat` mirroring the [e]multiplicity API, including - padicValNat_eq_of_dvd_of_not_dvd - padicValNat_add_of_gt - padicValNat_add_eq_min --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-data new-contributor awaiting-author 36/0 Mathlib/Data/Nat/MaxPowDiv.lean 1 7 ['Ruben-VandeVelde', 'github-actions', 'openendings'] nobody
18-51502
18 days ago
18-76998
18 days ago
3-62762
3 days
38049 WilliamCoram
author:WilliamCoram
 feat: lemmas towards showing gaussNorm on MvPowerSeries is an absolute value We prove lemmas: ``gaussNorm_mul_le`` and ``gaussNorm_le_mul`` which will allow us to show it is an absolute value on Mv restricted power series. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-ring-theory new-contributor 144/1 Mathlib/RingTheory/MvPowerSeries/GaussNorm.lean 1 4 ['WilliamCoram', 'github-actions'] alreadydone
assignee:alreadydone
17-75082
17 days ago
38-18027
38 days ago
38-17739
38 days
37714 mortarsanjaya
author:mortarsanjaya
 feat(Algebra/Order/Floor/Defs): `Nat.cast` is strictly monotone in `FloorSemiring` and `FloorRing` As title says, and without the `IsOrderedRing` assumption. Other than that, I removed the `IsOrderedRing` assumption from pretty much all the lemmas in `Algebra/Order/Floor/Defs` that could possibly have this assumption removed, and reduced some `IsStrictOrderedRing` assumptions to `IsOrderedRing` + `Nontrivial`. Due to strict monotonicity, we can also provide `CharZero` instance on `FloorSemiring` and `FloorRing`. Thus we can remove the `NeZero` and `Nontrivial` instances on them. The changes on `/Ring` and `/Semiring` are trivial changes due to some lemmas not requiring an `IsOrderedRing` instance anymore. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra new-contributor
label:t-algebra$
 96/39 Mathlib/Algebra/ContinuedFractions/Computation/Approximations.lean,Mathlib/Algebra/ContinuedFractions/Computation/TerminatesIffRat.lean,Mathlib/Algebra/Order/Floor/Defs.lean,Mathlib/Algebra/Order/Floor/Ring.lean,Mathlib/Algebra/Order/Floor/Semiring.lean 5 24 ['dagurtomas', 'eric-wieser', 'github-actions', 'mathlib-bors', 'mortarsanjaya'] eric-wieser
assignee:eric-wieser
17-59387
17 days ago
21-35158
21 days ago
45-34360
45 days
37062 tannerduve
author:tannerduve
 feat(Computability): Turing join and semilattice structure on Turing degrees ## Summary - Add `Partrec.kronecker` (equality test) and `Partrec.join` (disjoint union by parity) in `Partrec.lean` - Prove `Nat.RecursiveIn` is closed under computable conditionals (`cond_const`, `cond`) - Show each component reduces to the join (`left_le_join`, `right_le_join`) and the join is the least upper bound (`join_le`) - Establish `SemilatticeSup` instance on `TuringDegree` t-computability new-contributor large-import 311/15 Mathlib/Computability/Partrec.lean,Mathlib/Computability/RecursiveIn.lean,Mathlib/Computability/TuringDegree.lean 3 7 ['Komyyy', 'github-actions', 'mathlib-merge-conflicts', 'tannerduve'] Komyyy
assignee:Komyyy
17-59295
17 days ago
39-24289
39 days ago
39-86295
39 days
38170 maddycrim
author:maddycrim
 feat(Algebra/Module/FinitePresentation): Finitely Presented Module Lemma From FLT Project Main Definitions: `Module.FinitePresentation.exists_fin_exact` : A finitely presented module M admits an exact sequence F' -> F -> M -> 0 where F' and F are finite free modules. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra new-contributor awaiting-author
label:t-algebra$
 9/0 Mathlib/Algebra/Module/FinitePresentation.lean 1 17 ['chrisflav', 'github-actions', 'maddycrim', 'themathqueen', 'vlad902'] nobody
17-49833
17 days ago
17-49833
17 days ago
17-43852
17 days
38951 thomaskwaring
author:thomaskwaring
 feat(Order/PrimeSeparator): remove unnecessary hypotheses In `mem_ideal_sup_principal`, boundedness and distributivity were unused, and in `prime_ideal_of_disjoint_filter_ideal`, boundedness was only used to produce an element of the filter `F`, which is already nonempty by definition. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-order new-contributor 9/19 Mathlib/Order/PrimeSeparator.lean 1 2 ['github-actions'] nobody
17-47168
17 days ago
17-47255
17 days ago
17-46967
17 days
36896 PieterCuijpers
author:PieterCuijpers
 feat (Algebra/Order/Quantale): isMulLeftsided, isMulRightsided, isMulTwosided and strict versions * Adding definitions of quantale elements being leftsided, rightsided, and twosided, and strict versions Should we include these definitions in the main Algebra/Order/Quantale.lean file, or start a separate file for them? I have a few basic theorems I would like to include on these notions, but invite suggestions. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra new-contributor awaiting-author
label:t-algebra$
 81/1 Mathlib/Algebra/Order/Quantale.lean 1 5 ['NoahW314', 'PieterCuijpers', 'chrisflav', 'github-actions'] mariainesdff
assignee:mariainesdff
17-30978
17 days ago
24-23233
24 days ago
39-18222
39 days
38669 dannyply
author:dannyply
 feat(Topology/Algebra/PontryaginDual): prove compact monoids have discrete duals Proves that the Pontryagin dual of a compact monoid is discrete. As a consequence, it also adds the corresponding finite-type instances for compact discrete monoids. This upstreams a result first added downstream in [`YaelDillies/APAP`](https://github.com/YaelDillies/APAP), where this fact was needed to close a `sorry`. The proof separates the trivial character from all the others using the right half of the circle and adds a few reusable `Circle` helper lemmas near the existing related API. The original APAP proof was AI-assisted and then reviewed/rewritten during downstream review. For this PR, I used Codex to help adapt the APAP proof to mathlib and to refactor the supporting lemmas. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-topology new-contributor awaiting-author 130/16 Mathlib/Analysis/SpecialFunctions/Complex/Circle.lean,Mathlib/Topology/Algebra/PontryaginDual.lean,Mathlib/Topology/MetricSpace/Pseudo/Defs.lean 3 27 ['dannyply', 'github-actions', 'j-loreaux', 'tb65536'] j-loreaux
assignee:j-loreaux
17-16063
17 days ago
23-16965
23 days ago
0-75079
20 hours
38973 hyeoniuwu
author:hyeoniuwu
 feat(Computability): define (single oracle) turing reducibility, relate it to RecursiveIn and prove basic jump theorems feat(Computability): define (single oracle) Turing reducibility, relate it to RecursiveIn and prove basic jump theorems Defines Turing reducibility and the jump operator, with total functions (from naturals to naturals) as oracles. Defines codes for basic primitive recursive functions, and the evaluation function. Proves basic reducibility arguments, such as `K0_eq_K` asserting that K0 of an oracle is Turing equivalent to K of an oracle. Our reducibility is related back to `RecursiveIn` as is currently defined in Mathlib via the theorem `SingleReducibleIff`. This is part of a larger repository where more advanced theorems such as KP54 have been proven. (https://github.com/hyeoniuwu/CiL) Co-authored-by: Tanner Duve --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor awaiting-author 4988/0 Mathlib/Computability/SingleOracle/Basic.lean,Mathlib/Computability/SingleOracle/Constructions/Basic.lean,Mathlib/Computability/SingleOracle/Constructions/CovRec.lean,Mathlib/Computability/SingleOracle/Constructions/Dovetail.lean,Mathlib/Computability/SingleOracle/Constructions/Eval.lean,Mathlib/Computability/SingleOracle/Constructions/Eval_Aux.lean,Mathlib/Computability/SingleOracle/Constructions/List.lean,Mathlib/Computability/SingleOracle/Constructions/Meta.lean,Mathlib/Computability/SingleOracle/Constructions/Option.lean,Mathlib/Computability/SingleOracle/Constructions/Primitive.lean,Mathlib/Computability/SingleOracle/Encoding.lean,Mathlib/Computability/SingleOracle/Jump.lean,Mathlib/Computability/SingleOracle/Oracle.lean,Mathlib/Computability/SingleOracle/Order.lean,Mathlib/Computability/SingleOracle/RecursiveIn.lean,Mathlib/Computability/SingleOracle/Reducibilities.lean,Mathlib/Data/Option/Basic.lean,Mathlib/Tactic/Attr/Register.lean,Mathlib/Tactic/Computability/Basic.lean 19 3 ['github-actions', 'grunweg'] nobody
17-2310
17 days ago
unknown
0-0
0 seconds
37456 Robertboy18
author:Robertboy18
 feat(LinearAlgebra/AffineSpace): add parallel form of Desargues's theorem This PR adds an affine parallel form of Desargues's theorem, corresponding to entry `87` of the Lean community “100 theorems” list and following the related Rocq/Coq affine-geometry statement. **Main changes** - New file `Mathlib/LinearAlgebra/AffineSpace/Desargues.lean` with `parallel_third_side_of_perspective`. - Add the corresponding `public import` to `Mathlib.lean`. - Update `docs/100.yaml` entry `87` with a note that this is the parallel affine form. **Proof idea** The proof compares side vectors using `exists_eq_smul_of_parallel` for the two given pairs of parallel sides. The shared comparison along `SA` forces the same scalar, which gives parallelism of the third pair of sides. Tests: `lake build Mathlib.LinearAlgebra.AffineSpace.Desargues` AI disclosure: GPT-5.2 Pro was used for assistance with web search/background details about the theorem and for finding useful existing Mathlib lemmas. The theorem statement and Lean formalization were written and checked by hand. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra new-contributor awaiting-author LLM-generated
label:t-algebra$
 133/0 Mathlib.lean,Mathlib/LinearAlgebra/AffineSpace/Desargues.lean 2 17 ['Robertboy18', 'SnirBroshi', 'copilot-pull-request-reviewer', 'eric-wieser', 'github-actions', 'wwylele'] eric-wieser
assignee:eric-wieser
16-85348
16 days ago
43-27096
43 days ago
8-72313
8 days
38792 openendings
author:openendings
 wip, chore: rename Directed -> Predirected [please-adopt] This **incomplete** PR renames `Directed` to `Predirected`. As [discussed in Zulip](https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/.3E.20complete.20partial.20order.20and.20domain.20theory.20formalization/near/592156927), `Directed` misleadingly mismatches the literature. (The literature says a directed set is nonempty, and we do not.) #### f19d3e79 Rename Directed -> Predirected (class + namespace) Automated changes: - LSP code action renaming `Directed` to `Predirected` - with the affected 69 files open in [lean.nvim](https://github.com/julian/lean.nvim), a series of commands roughly equivalent to ```nvim :bufdo :silent %s/\(theorem \|lemma \|to_dual \)Directed\>/\1Predirected/ge :bufdo :silent %s/\\./Predirected./ge :bufdo :w ``` EDIT: manual changes - one `namespace Directed` replaced. ### Corners cut: - line-length linting has **not** been resolved. - no snake-cased `directed` has been renamed. - only tested via `lake build --old`, plus maybe ten minutes of `lake build` before I (@openendings ) got bored and wanted my CPU back. --- WIP please-adopt t-order [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) please-adopt new-contributor WIP merge-conflict 196/195 Mathlib/Algebra/Algebra/NonUnitalSubalgebra.lean,Mathlib/Algebra/Algebra/Subalgebra/Directed.lean,Mathlib/Algebra/Field/Subfield/Basic.lean,Mathlib/Algebra/Group/Subgroup/Lattice.lean,Mathlib/Algebra/Group/Submonoid/Membership.lean,Mathlib/Algebra/Group/Subsemigroup/Membership.lean,Mathlib/Algebra/Ring/Subring/Basic.lean,Mathlib/Algebra/Ring/Subsemiring/Basic.lean,Mathlib/Algebra/Star/NonUnitalSubalgebra.lean,Mathlib/Analysis/Convex/Basic.lean,Mathlib/Analysis/Convex/Strict.lean,Mathlib/Analysis/InnerProductSpace/Orthonormal.lean,Mathlib/CategoryTheory/Filtered/Basic.lean,Mathlib/Data/Finset/Order.lean,Mathlib/Data/Fintype/Order.lean,Mathlib/Data/Set/Accumulate.lean,Mathlib/Data/Set/Dissipate.lean,Mathlib/Data/Set/Finite/Lattice.lean,Mathlib/Data/Set/Lattice.lean,Mathlib/Data/Set/Lattice/Image.lean,Mathlib/Data/Set/Pairwise/Lattice.lean,Mathlib/Data/Set/UnionLift.lean,Mathlib/Dynamics/PeriodicPts/Lemmas.lean,Mathlib/FieldTheory/CardinalEmb.lean,Mathlib/FieldTheory/Extension.lean,Mathlib/FieldTheory/IntermediateField/Adjoin/Basic.lean,Mathlib/LinearAlgebra/Eigenspace/Basic.lean,Mathlib/LinearAlgebra/LinearIndependent/Lemmas.lean,Mathlib/LinearAlgebra/Span/Defs.lean,Mathlib/Logic/Encodable/Basic.lean,Mathlib/MeasureTheory/Function/SimpleFunc.lean,Mathlib/MeasureTheory/Integral/Lebesgue/Add.lean,Mathlib/MeasureTheory/Integral/Lebesgue/Basic.lean,Mathlib/MeasureTheory/Integral/Lebesgue/Sub.lean,Mathlib/MeasureTheory/Measure/MeasureSpace.lean,Mathlib/MeasureTheory/Measure/Restrict.lean,Mathlib/MeasureTheory/PiSystem.lean,Mathlib/ModelTheory/Satisfiability.lean,Mathlib/ModelTheory/Substructures.lean,Mathlib/ModelTheory/Syntax.lean,Mathlib/Order/CompactlyGenerated/Basic.lean,Mathlib/Order/CompletePartialOrder.lean,Mathlib/Order/ConditionallyCompletePartialOrder/Defs.lean,Mathlib/Order/ConditionallyCompletePartialOrder/Indexed.lean,Mathlib/Order/Directed.lean,Mathlib/Order/Filter/Bases/Basic.lean,Mathlib/Order/Filter/Basic.lean,Mathlib/Order/Filter/Lift.lean,Mathlib/Order/Filter/Map.lean,Mathlib/Order/OmegaCompletePartialOrder.lean,Mathlib/Order/Preorder/Chain.lean,Mathlib/Order/RelIso/Set.lean,Mathlib/Probability/Independence/Basic.lean,Mathlib/Probability/Independence/Conditional.lean,Mathlib/Probability/Independence/Kernel/Indep.lean,Mathlib/Probability/Independence/ZeroOne.lean,Mathlib/Probability/Kernel/Disintegration/CDFToKernel.lean,Mathlib/RingTheory/AlgebraicIndependent/Basic.lean,Mathlib/RingTheory/NonUnitalSubring/Basic.lean,Mathlib/RingTheory/NonUnitalSubsemiring/Basic.lean,Mathlib/Topology/Algebra/Valued/NormedValued.lean,Mathlib/Topology/Category/TopCat/Limits/Konig.lean,Mathlib/Topology/Compactness/Compact.lean,Mathlib/Topology/Compactness/CompactSystem.lean,Mathlib/Topology/Compactness/CountablyCompact.lean,Mathlib/Topology/Semicontinuity/Basic.lean,Mathlib/Topology/Separation/Hausdorff.lean,Mathlib/Topology/Separation/Profinite.lean,Mathlib/Topology/UniformSpace/UniformConvergenceTopology.lean 69 7 ['github-actions', 'kbuzzard', 'mathlib-merge-conflicts', 'openendings'] nobody
16-80737
16 days ago
unknown
0-0
0 seconds
38960 ajhendel
author:ajhendel
 chore: remove ℕ+ interval_cases workaround in ADEInequality `interval_cases` now supports `ℕ+`, so the manual `Finset.mem_Iio`/`Finset.mem_Ico` + `conv` + `fin_cases` workaround (marked with a porting note) is no longer needed. Replaces three 3-4 line workaround blocks with `interval_cases p`/`q`/`r`. t-number-theory new-contributor awaiting-CI 3/10 Mathlib/NumberTheory/ADEInequality.lean 1 2 ['github-actions'] nobody
16-33529
16 days ago
17-34461
17 days ago
0-105
1 minute
38310 ZRTMRH
author:ZRTMRH
 feat(Combinatorics/Quiver/Schreier): word evaluation and reachability Adds word evaluation and reachability results to the Schreier graph API. * `SchreierGraph.evalWord` : evaluates a word `List (S × Bool)` as an element of the ambient group, where `(s, true)` contributes `ι s` and `(s, false)` contributes `(ι s)⁻¹`. * `SchreierGraph.evalWord_eq_lift` : agreement with `FreeGroup.lift`. * `SchreierGraph.evalWord_mem_closure` : every word evaluates into the subgroup generated by `ι`. * `SchreierGraph.pathFromWord` : a Bool-tagged word yields a path in `Symmetrify (SchreierGraph V ι)` from `x` to `evalWord ι w • x`. * `SchreierGraph.reachable_iff` : two vertices are connected by a path in the symmetrification iff some element of the subgroup closure carries one to the other. Follow-up to #36320. This PR was written with AI assistance (Claude). The code has been reviewed by the author. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor t-combinatorics large-import LLM-generated 157/0 Mathlib/Combinatorics/Quiver/Schreier.lean 1 2 ['github-actions'] nobody
15-61183
15 days ago
32-8257
32 days ago
32-7969
32 days
39023 TBUGTB
author:TBUGTB
 feat(Algebra/Order): API lemmas on floor and abs Co-authored-by: Etienne Marion @EtienneC30 --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra brownian new-contributor
label:t-algebra$
 9/0 Mathlib/Algebra/Order/Floor/Semiring.lean,Mathlib/Algebra/Order/Ring/Abs.lean 2 3 ['TBUGTB', 'github-actions'] nobody
15-42909
15 days ago
15-46098
15 days ago
15-45810
15 days
38374 idontgetoutmuch
author:idontgetoutmuch
 Principal Bundles, Connection 1-forms and the Frame Bundle --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-differential-geometry new-contributor 2017/0 Mathlib/Geometry/Manifold/Algebra/FakeFormII.lean,Mathlib/Geometry/Manifold/Algebra/PrincipalGBundle.lean,Mathlib/Geometry/Manifold/Algebra/SmoothLieExp.lean 3 2 ['github-actions'] nobody
15-32126
15 days ago
unknown
0-0
0 seconds
38194 ryanncode
author:ryanncode
 feat(LinearAlgebra/BilinearForm): add indefinite metrics Add the `IndefiniteMetric` structure to support vector spaces equipped with a non-degenerate, symmetric, indefinite bilinear form. Provide the algebraic foundation for indefinite inner product spaces by formalizing the metric via `LinearMap.BilinForm` and extracting its associated quadratic form without enforcing the `IsPosSemidef` typeclass. Previously, mathlib required strictly positive-definite metrics to instantiate inner product spaces (`InnerProductSpace`), which prevented the formalization of indefinite geometries without causing typeclass inference failures. Bridge this gap by isolating the symmetric bilinear form from topological and positivity constraints, allowing the library to handle generalized indefinite metric spaces safely. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra new-contributor awaiting-author
label:t-algebra$
 47/0 Mathlib.lean,Mathlib/LinearAlgebra/BilinearForm/IndefiniteMetric.lean 2 4 ['dagurtomas', 'github-actions', 'mathlib-merge-conflicts'] nobody
15-24451
15 days ago
15-24451
15 days ago
15-56169
15 days
38527 archiebrowne
author:archiebrowne
 feat(Analysis/Calculus): continuously differentiable actions define the class `ContDiffSMul 𝕜 M X n` which asserts that the map `(c, x) ↦ c • x` is `n` times continuously differentiable on `M × X`. Many of the results are the C^n analogues of those in the module Mathlib.Topology.Algebra.MulAction. t-differential-geometry new-contributor 317/24 Mathlib.lean,Mathlib/Analysis/Calculus/BumpFunction/Basic.lean,Mathlib/Analysis/Calculus/ContDiff/Operations.lean,Mathlib/Analysis/Calculus/IteratedDeriv/Lemmas.lean,Mathlib/Analysis/ContDiffMulAction.lean,Mathlib/Analysis/InnerProductSpace/Calculus.lean 6 11 ['archiebrowne', 'github-actions', 'grunweg', 'peabrainiac'] PatrickMassot and grunweg
assignee:grunweg assignee:PatrickMassot
15-5170
15 days ago
15-5245
15 days ago
22-77266
22 days
39048 AydenLamp
author:AydenLamp
 feat(Algebra/Group/Defs): add positive natural exponentiation for semigroups Introduce exponentiation for semigroups with positive natural exponents. This serves as a foundation for future results on Green’s relations and Rees matrix constructions in semigroups. --- Co-authored-by: Howard Straubing Soleil Repple Nathan Hart-Hodgson [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor t-algebra awaiting-author
label:t-algebra$
 106/0 Mathlib.lean,Mathlib/Algebra/Group/SemigroupPow.lean 2 7 ['ScottCarnahan', 'github-actions', 'wwylele'] nobody
14-46300
14 days ago
15-3871
15 days ago
0-115
1 minute
38476 agusakov
author:agusakov
 refactor(Combinatorics/Digraph): add vertex sets --- Adopting #33466 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-combinatorics new-contributor awaiting-author 381/50 Mathlib/Combinatorics/Digraph/Basic.lean,Mathlib/Combinatorics/Digraph/Orientation.lean 2 16 ['Shreyas4991', 'YaelDillies', 'agusakov', 'github-actions'] nobody
14-35644
14 days ago
23-54185
23 days ago
3-33232
3 days
38223 Deicyde
author:Deicyde
 feat(Geometry/Manifold): add `MfldCat`, the category of `C^n` manifolds We define `MfldCat 𝕜 n`: the category of `C^n` manifolds over a field `𝕜`, following the pattern of `TopCat` in `Mathlib.Topology.Category.TopCat.Basic`. We also implement `HasForget₂ (MfldCat 𝕜 n) TopCat`—the forgetful functor into the category of topological spaces. For more discussion see the Zulip thread: [#PR reviews > #38223 The Category of C^n Manifolds](https://leanprover.zulipchat.com/#narrow/channel/144837-PR-reviews/topic/.2338223.20The.20Category.20of.20C.5En.20Manifolds/with/587038032) Also added: `ContMDiffMap.id_apply`, `.coe_id` and `.coe_comp` which are comparable to `ContinuousMap` API. ### Future work - ✅ Define a Monoidal structure via product manifolds, analogous to `Manifold.Topology.Category.TopCat.Monoidal` #38560 - ✅ Define the tangent functor: `M ↦ TM`, `F ↦ F.tangentMap` from `MfldCat (n+1) 𝕜` to `MfldCat n 𝕜` #38270 - Functor `FGModuleCat 𝕜 ⥤ MfldCat 𝕜 n` sending a finite-dimensional `𝕜`-vector space to the manifold modeled on itself. Left as `TODO`. - Define `FGModuleCat 𝕜` as an enriched category over `MfldCat n 𝕜`. Then _smooth functors_ can be realized as endofunctors on the enriched category. This is the main motivation for this construction. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-differential-geometry new-contributor t-category-theory 224/0 Mathlib.lean,Mathlib/Geometry/Manifold/Category/MfldCat/Basic.lean,Mathlib/Geometry/Manifold/ContMDiffMap.lean 3 57 ['Deicyde', 'chrisflav', 'dagurtomas', 'github-actions', 'idontgetoutmuch', 'peabrainiac'] kim-em
assignee:kim-em
14-4140
14 days ago
14-7564
14 days ago
27-57392
27 days
37190 cjrl
author:cjrl
 feat(Combinatorics): Set-Valued Pigeonhole Principle This PR contributes two theorems to combinatorics: - `exists_lt_card_cover_of_card_biUnion_lt_card` is a set-valued version of the pigeonhole principle. - `sum_card_eq_sum_card_cover_biUnion` is a set theoretic corollary of a double counting result proved for bipartite graphs (`Finset.sum_card_bipartiteAbove_eq_sum_card_bipartiteBelow`). This was needed to prove the above pigeonhole principle. The motivation for these results is our Latin Square PR #36698. These results were proved in less general terms in that PR, but are independent of Latin Square considerations and so we have generalized and moved them into more relevant files. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor t-combinatorics 38/0 Mathlib/Combinatorics/Enumerative/DoubleCounting.lean,Mathlib/Combinatorics/Pigeonhole.lean 2 16 ['IvanRenison', 'cjrl', 'ghseeli', 'github-actions', 'j-loreaux', 'vlad902'] b-mehta
assignee:b-mehta
13-74935
13 days ago
40-9031
40 days ago
55-65942
55 days
38309 ntapiam
author:ntapiam
 feat(Algebra/NonAssoc): dendriform algebras Define dendriform semirings and algebras --- This PR introduces dendriform structures such as dendriform semirings and algebras, and proves basic facts linking them to their pre-Lie counterparts. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra new-contributor
label:t-algebra$
 270/0 Mathlib.lean,Mathlib/Algebra/NonAssoc/Dendriform/Defs.lean,docs/references.bib 3 5 ['dagurtomas', 'github-actions', 'ntapiam'] ocfnash
assignee:ocfnash
13-74925
13 days ago
14-40703
14 days ago
29-45712
29 days
38373 Nicola9Falciola
author:Nicola9Falciola
 feat (Algebra/FreeAbelianGroup /Finsupp) : The support of non zero element in a freeabeliangroup is non empty Add the lemma that for a nonzero a : FreeAbelianGroup X the support of it is non empty. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra new-contributor
label:t-algebra$
 3/0 Mathlib/Algebra/FreeAbelianGroup/Finsupp.lean 1 7 ['Nicola9Falciola', 'SnirBroshi', 'github-actions'] ocfnash
assignee:ocfnash
13-74917
13 days ago
29-30660
29 days ago
30-18813
30 days
37932 idontgetoutmuch
author:idontgetoutmuch
 feat: Exponential map of Lie group is smooth We construct the exponential map `expLie : g → G` for a Lie group `G` and prove that it is smooth. The main reference is: * Eckhard Meinrenken, *Lie Groups and Lie Algebras*, Lecture Notes, University of Toronto. Available at https://www.math.toronto.edu/mein/teaching/LectureNotes/lie.pdf --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor t-differential-geometry awaiting-author 392/0 Mathlib.lean,Mathlib/Geometry/Manifold/Algebra/SmoothLieExp.lean 2 31 ['github-actions', 'grunweg', 'idontgetoutmuch', 'wwylele'] nobody
13-44210
13 days ago
34-48368
34 days ago
0-973
16 minutes
39108 idontgetoutmuch
author:idontgetoutmuch
 feat(Geometry/Manifold/GroupLieAlgebra): Add mfderiv_mul_left_mul and left-translate for integral curves Add the following: `mfderiv_mul_left_mul`: the derivative of left-multiplication satisfies a chain rule: $$d(L_{g \cdot h})_x = d(L_g)_{h \cdot x} \circ d(L_h)_x$$ `mulInvariantVectorField_mul`: the vector field at the translated point is the push forward of the vector field: $$V(g \cdot h) = d(L_g)_h(V(h))$$ `IsMIntegralCurve.left_translate`: using these, if $\gamma$ is an integral curve of $V$, then so is $t \mapsto g \bullet \gamma(t)$ for any $g \in G$, since: $$\frac{d}{dt}(g \bullet \gamma(t)) = d(L_g)_{\gamma(t)}\left(\frac{d\gamma}{dt}(t)\right) = d(L_g)_{\gamma(t)}(V(\gamma(t))) = V(g \bullet \gamma(t))$$ I argue (*) all the time with LLMs so this PR will certainly have had some input from them. Is that enough of a disclosure? (*) Like Lewis Carroll: In my youth said the sage I took to the law and argued each case with wife And the muscular strength that it gave to my jaw has lasted the rest of my life t-differential-geometry new-contributor awaiting-author LLM-generated 73/0 Mathlib/Geometry/Manifold/GroupLieAlgebra.lean 1 8 ['github-actions', 'grunweg'] nobody
13-14700
13 days ago
13-14765
13 days ago
0-37992
10 hours
38595 openendings
author:openendings
 chore(CategoryTheory): remove defeq abuse in Monad/Kleisli.lean Currently most of Kleisli.lean uses defeq abuse to perform deep rewrites equivalent to `Kleisli.of_mk`, `Kleisli.mk_of`, etc. This PR removes all backward.isDefEq.respectTransparency from the file. Additionally: - Add `theorem Kleisli.comp`, encoding `Kleisli.category.map_comp` in the base category. - Add `theorem Cokleisli.comp`, encoding `category.map_comp` in the base category. - Make `C` implicit in `Monad.unit_naturality` and `Monad.mu_naturality`. - Make `C` implicit in `Comonad.counit_naturality` and `Comonad.delta_naturality`. --- - ~~I would greatly appreciate advice ([e.g. via Zulip](https://leanprover.zulipchat.com/#user/1060393)) on tackling the remainder of this file: the defeqs mostly appear in morally `simp`/`calc` proofs that look horrid in `refine` style. I can supply more rfl theorems like `of_mk` and `mk_of` (and hope to do so in subsequent PRs), but don't know how to use them for a deep type rewrite.~~ [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-category-theory new-contributor awaiting-author WIP 95/28 Mathlib/CategoryTheory/Monad/Basic.lean,Mathlib/CategoryTheory/Monad/Kleisli.lean,MathlibTest/CategoryTheory/Monad.lean 3 22 ['dagurtomas', 'github-actions', 'joelriou', 'openendings'] nobody
12-72853
12 days ago
24-67643
24 days ago
0-4425
1 hour
39151 anovickis
author:anovickis
 feat(Analysis/CStarAlgebra/Matrix): IsTopologicalGroup for specialUnitaryGroup Adds `ContinuousInv` and `IsTopologicalGroup` instances for `Matrix.specialUnitaryGroup n 𝕜`. The unitary group `Matrix.unitaryGroup n α` already inherits these via the `unitaryGroup ≡ unitary R` abbrev + existing instances on `unitary R` (in `Mathlib/Topology/Algebra/Star/Unitary.lean`). However, `specialUnitaryGroup` is the sub-Submonoid `unitaryGroup ⊓ MonoidHom.mker detMonoidHom` — it does not auto-inherit those instances since it is not literally an alias of `unitary R`. ### New declarations - `instance Matrix.specialUnitaryGroup.instContinuousInv` — proven via `Matrix.star_eq_inv` + `continuous_star` - `instance Matrix.specialUnitaryGroup.instIsTopologicalGroup` — combining `ContinuousMul` (from Submonoid structure) + `ContinuousInv` Both placed inside the existing `EntrywiseSupNorm` section in `Mathlib/Analysis/CStarAlgebra/Matrix.lean` (the natural neighborhood for matrix-specific topological structure on (special) unitary groups). ### Motivation These instances enable using `specialUnitaryGroup` as a topological group in homogeneous-space constructions (e.g., `SU(3) ⧸ T = F₂` flag manifolds). They complement #39146 (CompactSpace instances for the same groups) — together giving the standard 'compact topological group' typeclass set on `specialUnitaryGroup`. ### Verification \`\`\`lean example : ContinuousInv (Matrix.specialUnitaryGroup (Fin 3) ℂ) := inferInstance -- now works example : IsTopologicalGroup (Matrix.specialUnitaryGroup (Fin 3) ℂ) := inferInstance -- now works \`\`\` Both fail on master without this PR; both succeed after. t-analysis new-contributor awaiting-author 30/0 Mathlib/Analysis/CStarAlgebra/Matrix.lean 1 3 ['github-actions', 'j-loreaux', 'wwylele'] nobody
12-3824
12 days ago
12-3824
12 days ago
0-3921
1 hour
39191 m13683320924-hue
author:m13683320924-hue
 feat: define Asymptotics.IsSubpolynomial This PR defines `Asymptotics.IsSubpolynomial l f g`, meaning that `f` is asymptotically bounded by `1 + ‖g‖ ^ k` for some `k : ℕ`. It also adds basic closure lemmas for constants, addition, multiplication, and natural powers. Towards #32658. The formalization was developed with the help of Doubao-Seed-2.0-code and manually checked in Lean. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-analysis new-contributor 259/0 Mathlib.lean,Mathlib/Analysis/Asymptotics/Subpolynomial.lean 2 3 ['github-actions'] nobody
11-29782
11 days ago
11-40743
11 days ago
0-344
5 minutes
34054 YellPika
author:YellPika
 feat(Order/OmegaCompletePartialOrder): OmegaCompletePartialOrder instance for `Sigma` with basic `ωScottContinuous` lemmas This PR adds an `OmegaCompletePartialOrder` instance for `Sigma` along with `ωScottContinuous` lemmas for basic operations (`mk`, `fst`, `snd`). Appropriate lemmas are marked with `@[fun_prop]` so that the `fun_prop` tactic can automatically deduce `ωScottContinuous` proofs for functions involving `Sigma`s. --- - [x] depends on: #33941 - [x] depends on: #37258 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor t-order please-merge-master awaiting-author 231/0 Mathlib/Data/Sigma/Order.lean,Mathlib/Order/OmegaCompletePartialOrder.lean 2 29 ['Vierkantor', 'YellPika', 'github-actions', 'grunweg', 'mathlib-dependent-issues', 'mathlib-merge-conflicts'] grunweg
assignee:grunweg
11-24534
11 days ago
91-5785
91 days ago
16-66871
16 days
39213 m13683320924-hue
author:m13683320924-hue
 feat: define maximal cliques and independent sets This PR adds explicit predicates for maximal cliques and maximal independent sets: - `SimpleGraph.IsMaximalClique` - `SimpleGraph.IsMaximalIndepSet` It also adds conversion lemmas to and from the existing `Maximal G.IsClique` and `Maximal G.IsIndepSet` formulations, plus basic complement and maximum-to-maximal lemmas. Towards #34962. The formalization was developed with the help of Doubao-Seed-2.0-code and manually checked in Lean. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-combinatorics new-contributor LLM-generated 60/22 Mathlib/Combinatorics/SimpleGraph/Clique.lean 1 3 ['SnirBroshi', 'github-actions'] nobody
11-9189
11 days ago
11-17018
11 days ago
0-389
6 minutes
37716 slavanaprienko
author:slavanaprienko
 feat(LinearAlgebra/Matrix/Determinant): Desnanot-Jacobi identity This PR adds the Desnanot-Jacobi identity (also known as the Lewis Carroll identity or Dodgson condensation): for any (n+2)×(n+2) matrix M over a commutative ring, $$\det(M) \cdot \det(M_{1,n}^{1,n}) = \det(M_1^1) \cdot \det(M_n^n) - \det(M_1^n) \cdot \det(M_n^1)$$ The proof follows Bressoud's *Proofs and Confirmations* (Cambridge University Press, 1999): multiply M by an auxiliary matrix built from columns of the adjugate, then compare determinants. This yields the identity premultiplied by det(M). To cancel, we pass to a universal polynomial ring (an integral domain with nonzero determinant), then specialize back to arbitrary commutative rings. It seems there's some interest in adding this: https://leanprover.zulipchat.com/#narrow/channel/217875-Is-there-code-for-X.3F/topic/Determinantal.20identity.20and.20the.20Cauchy.20matrix.20determinant/with/582946873 --- t-algebra new-contributor
label:t-algebra$
 217/0 Mathlib.lean,Mathlib/LinearAlgebra/Matrix/Determinant/DesnanotJacobi.lean 2 13 ['SnirBroshi', 'github-actions', 'grunweg', 'kim-em', 'slavanaprienko'] nobody
11-7122
11 days ago
11-6876
11 days ago
12-44818
12 days
32608 PrParadoxy
author:PrParadoxy
 feat(LinearAlgebra/PiTensorProduct): API for PiTensorProducts indexed by sets This PR addresses a TODO item in LinearAlgebra/PiTensorProduct.lean: * API for the various ways ι can be split into subsets; connect this with the binary tensor product -- specifically by describing tensors of type ⨂ (i : S), M i, for S : Set ι. Our primary motivation is to formalise the notion of "restricted tensor products". This will be the content of a follow-up PR. Beyond that, the Set API is natural in contexts where the index type has an independent interpretation. An example is quantum physics, where ι ranges over distinguishable degrees of freedom, and where its is common practice to annotate objects by the set of indices they are defined on. --- Stub file with preliminary definition of the restricted tensor product as a direct limit of tensors indexed by finite subsets of an index type: https://github.com/PrParadoxy/mathlib4/blob/restricted-stub/Mathlib/LinearAlgebra/PiTensorProduct/Restricted.lean --- - [x] depends on: #32598 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor awaiting-zulip t-algebra WIP
label:t-algebra$
 300/2 Mathlib.lean,Mathlib/LinearAlgebra/PiTensorProduct.lean,Mathlib/LinearAlgebra/PiTensorProduct/Set.lean 3 31 ['PrParadoxy', 'dagurtomas', 'eric-wieser', 'github-actions', 'goliath-klein', 'leanprover-radar', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
11-6368
11 days ago
151-17090
151 days ago
10-66980
10 days
37625 slavanaprienko
author:slavanaprienko
 feat(LinearAlgebra/Matrix/Charpoly): general coefficient formula as sum of principal minors This PR adds a general formula for the coefficients of `det(1 + X • M)` as sums of principal minors, generalizing the existing `coeff_det_one_add_X_smul_one` (k=1, trace) and `det_eq_sign_charpoly_coeff` (k=n, determinant). It also derives the corresponding formula for the coefficients of the characteristic polynomial via `charpolyRev`. New results: - `det_piecewise_one_eq_submatrix_det`: relates piecewise-with-identity to principal submatrix determinants - `coeff_det_one_add_X_smul_eq_sum_minors`: the k-th coefficient of `det(1 + X • M)` equals the sum of k×k principal minors - `charpoly_coeff_eq_sum_minors`: coefficients of the characteristic polynomial as signed sums of principal minors --- t-algebra new-contributor ready-to-merge
label:t-algebra$
 105/1 Mathlib/LinearAlgebra/Matrix/Charpoly/Coeff.lean 1 28 ['eric-wieser', 'github-actions', 'kim-em', 'mathlib-bors', 'slavanaprienko', 'wwylele'] nobody
11-4627
11 days ago
11-61202
11 days ago
37-17965
37 days
37299 XC0R
author:XC0R
 feat(NumberTheory): Chebyshev's lower bound on primorial ## Summary Prove `primorial(n) ≥ 2^(n/2)` for all `n ≥ 2` (Chebyshev's 1852 lower bound). This is the lower bound complement to `primorial_le_four_pow`. Addresses the TODO at `Chebyshev.lean` line 50: "Prove Chebyshev's lower bound." ### New file: `Mathlib/NumberTheory/PrimorialLowerBound.lean` **Main theorems:** - `two_pow_le_primorial`: `2 ^ n ≤ primorial (2 * n)` for `n ≥ 29` - `two_pow_div_two_le_primorial`: `2 ^ (n / 2) ≤ primorial n` for `n ≥ 2` **Key intermediates:** - `centralBinom_le_pow_mul_primorial`: `C(2n,n) ≤ (2n)^{π(√(2n)+1)} * primorial(2n)` - `eight_mul_sq_add_le_two_pow`: `8u² + 16u + 8 ≤ 2^u` for `u ≥ 10` ### Proof technique Central binomial decomposition: from `four_pow_lt_mul_centralBinom` and `factorization_choose_le_log`, bound `C(2n,n)` above by `(2n)^{π(√(2n)+1)} * primorial(2n)`. Rearranging gives `primorial(2n) ≥ 2^n` for `n ≥ 29`. Base cases by `norm_num` + `decide`, large `n` analytically via `√n` factoring. ### AI disclosure Claude (Anthropic) was used as a coding assistant for Lean tactic exploration, file structuring, and CI debugging. All proof strategy, mathematical content, and final code have been reviewed and are understood by the author. t-number-theory new-contributor awaiting-author 226/2 Mathlib/NumberTheory/Chebyshev.lean,Mathlib/NumberTheory/Primorial.lean 2 53 ['MichaelStollBayreuth', 'Parcly-Taxel', 'XC0R', 'github-actions', 'mathlib-merge-conflicts', 'wwylele'] MichaelStollBayreuth
assignee:MichaelStollBayreuth
10-84773
10 days ago
42-10476
42 days ago
13-62238
13 days
39162 anovickis
author:anovickis
 feat(Topology/PartitionOfUnity): add pointwise_decomposition_finsum + companions Add three short lemmas to `Mathlib/Topology/PartitionOfUnity.lean` extending the existing `PartitionOfUnity` API: - `pointwise_decomposition_finsum` — for `f : X → ℝ` and `x ∈ s`, `f x = ∑ᶠ i, ρ i x · f x`. This is the pointwise step that lifts to integral linearity in measure-theoretic PoU integration: `∫_s f dμ = ∑ᶠ i, ∫_s (ρ i · f) dμ`. - `one_minus_sum_nonneg` — `0 ≤ 1 - ∑ᶠ i, ρ i x`. Direct rearrangement of the existing `sum_le_one` field; useful as a complement-mass remainder bound in chart-by-chart estimates. - `abs_le_one` — `|ρ i x| ≤ 1`. Combines the existing `nonneg` and `le_one`; convenience for absolute-value bounds. All three are short proofs using existing structure fields (`sum_eq_one`, `sum_le_one`, `nonneg`, `le_one`). These came up while writing chart-by-chart Stokes-on-manifold estimates where one wants to decompose `∫_M f` into chart-supported pieces using a partition of unity. The pointwise identity is the obvious first step; the other two are complementary algebraic bounds that show up in remainder estimates. --- 🤖 Generated with [Claude Code](https://claude.com/claude-code) t-topology new-contributor LLM-generated 27/0 Mathlib/Topology/PartitionOfUnity.lean 1 2 ['github-actions'] urkud
assignee:urkud
10-74890
10 days ago
11-70811
11 days ago
11-70523
11 days
39212 emlis42
author:emlis42
 feat(Algebra/ContinuedFractions): add `partNums!` and `partDens!` This PR adds `partNums!` and `partDens!`, which provide infinite stream representations for the sequences of partial numerators and denominators of a generalized continued fraction. t-algebra new-contributor
label:t-algebra$
 8/0 Mathlib/Algebra/ContinuedFractions/Basic.lean 1 4 ['emlis42', 'github-actions', 'grunweg'] nobody
10-71851
10 days ago
11-18170
11 days ago
11-17882
11 days
39232 jerwaynejones
author:jerwaynejones
 feat(Analysis/Complex): residue theorem for rectangular contours Adds `Mathlib/Analysis/Complex/RectangleResidue.lean` (644 LoC), filling the gap between Cauchy–Goursat for rectangles (`Complex.integral_boundary_rect_eq_zero_of_differentiable_on_off_countable`) and the Cauchy integral formula for circles. The file proves the residue formula for rectangular boundary integrals together with a rotated principal log branch needed to evaluate the left-edge integral that crosses the standard cut. ## Why Mathlib has Cauchy–Goursat for rectangles and the Cauchy integral formula for circles, but no residue theorem for rectangular contours. This file fills that gap. It was extracted from a downstream Lean 4 formalization project (a conditional proof of Goldbach's conjecture, where contour shifting on rectangles arises naturally in Perron's formula). ## Main results - **`Complex.hasDerivAt_log_neg`** — the rotated logarithm `log_neg z := log (-z) + I * π` has derivative `z⁻¹` on the rotated slit plane `{z | -z ∈ slitPlane}` (cut on the positive real axis). - **`Complex.boundaryIntegral_inv_sub_eq_two_pi_I`** — for `ρ` strictly inside the rectangle `[z, w]`, `∮_{∂[z,w]} (s − ρ)⁻¹ ds = 2πi`. - **`Complex.boundaryIntegral_eq_residue_sum`** — parametric residue theorem for a sum of simple poles plus a holomorphic remainder, packaged as `Complex.RectangleResidueData`. - **`Complex.boundaryIntegral_single_pole`** — the one-pole specialization. ## Structure The development proceeds in five stages: 1. A notation `Complex.boundaryIntegral` for the oriented boundary integral over `[z, w]`, with a Cauchy–Goursat wrapper and additivity/scaling lemmas. 2. A rotated principal logarithm `Complex.log_neg z := log (-z) + I * π` with cut on the *positive* real axis, plus its derivative and corner-comparison identities with the standard `Complex.log`. 3. Explicit FTC-based evaluations of the four edge integrals of `(s − ρ)⁻¹`. 4. A closed-form residue boundary integral `∮_{∂[z,w]} (s − ρ)⁻¹ ds = 2πi` for `ρ` strictly inside the rectangle. 5. A parametric residue theorem for sums of simple poles plus a holomorphic remainder, packaged as `Complex.RectangleResidueData`. ## References - L. Ahlfors, *Complex Analysis* (3rd ed.), §4.5. - E. Stein and R. Shakarchi, *Complex Analysis*, Ch. 2 §3 Thm 3.1. ## Status Draft while CI verifies the build against current `master` — the file was developed against `v4.28.0` and cherry-picked forward 2942 commits, so import surface changes are possible. Once CI is green I will flip to ready-for-review. 🤖 Generated with [Claude Code](https://claude.com/claude-code) t-analysis new-contributor 644/0 Mathlib.lean,Mathlib/Analysis/Complex/RectangleResidue.lean 2 2 ['github-actions'] nobody
10-56243
10 days ago
unknown
0-0
0 seconds
38334 8e7
author:8e7
 feat(Combinatorics/SimpleGraph/TreeDecomp): define tree decompositions Add definition for tree decompositions on simple graphs. Define the tree width of a simple graph and prove basic statements and conversions. ```lean structure TreeDecomp (G : SimpleGraph V) where /-- The type of bags in the tree. -/ W : Type u /-- The set of vertices in each bag. -/ 𝓧 : W → Finset V /-- The graph adjacency relation of bags. -/ T : SimpleGraph W /-- T must be a tree. -/ isTree : IsTree T /-- All vertices in G must appear in some bag. -/ vertexCover : ∀ v : V, ∃ w : W, v ∈ 𝓧 w /-- For any edge (u, v) in G, there is a bag containing both u and v. -/ edgeCover ⦃u v : V⦄ : G.Adj u v → ∃ w : W, u ∈ 𝓧 w ∧ v ∈ 𝓧 w /-- For any vertex v in G, the set of bags that contain v is preconnected. -/ connectedBags : ∀ v : V, (T.induce ({w | v ∈ 𝓧 w})).Preconnected ``` AI Usage: Some proofs are written with the help of Claude Code, and everything has been manually reviewed. --- - [ ] depends on: #38027 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor help-wanted blocked-by-other-PR t-combinatorics LLM-generated WIP 396/0 Mathlib.lean,Mathlib/Combinatorics/SimpleGraph/Star.lean,Mathlib/Combinatorics/SimpleGraph/TreeDecomp.lean 3 5 ['8e7', 'github-actions', 'mathlib-dependent-issues'] nobody
10-53672
10 days ago
31-33994
31 days ago
0-356
5 minutes
39239 alainchmt
author:alainchmt
 feat(FieldTheory/Finite): irreducible polynomial divides X^q^n - X iff degree divides n --- Add the theorem saying that, for an irreducible polynomial `f` over a finite field `K`, the degree of `f` divides `n` if and only if `f` divides `X ^ (Nat.card K) ^ n - X`. Include auxiliary lemmas. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra new-contributor
label:t-algebra$
 34/0 Mathlib/FieldTheory/Finite/Extension.lean,Mathlib/FieldTheory/Minpoly/Field.lean 2 2 ['github-actions'] nobody
10-44063
10 days ago
10-44152
10 days ago
10-43864
10 days
39164 allenhaozhu
author:allenhaozhu
 feat(Probability/Distance): add total variation distance `tvDist` Add `MeasureTheory.tvDist : Measure α → Measure α → ℝ≥0∞`, the total variation distance between two measures, defined via the truncated subtraction `μ - ν` already in `Mathlib.MeasureTheory.Measure.Sub`. Add four basic lemmas (`tvDist_self`, `tvDist_comm`, `tvDist_nonneg`, `tvDist_le_one`) and a bridge lemma `tvDist_eq_signedMeasure_totalVariation` connecting `tvDist` to the existing `MeasureTheory.SignedMeasure.totalVariation` for finite measures. --- ## AI-assistance disclosure Per the Mathlib [AI-use policy](https://leanprover-community.github.io/contribute/index.html#use-of-ai): - **Tool.** Claude Code (Anthropic) with the Claude Sonnet 4.6 model. - **Use.** I specified the target lemma statements and the proof strategy; the assistant drafted Lean 4 tactic combinations against current Mathlib. I iterated on the proofs, verified each lemma builds under `lake build` from a clean checkout, and read the final code. - **Vouching.** I have read every declaration in this file and can defend the proofs without further AI assistance. I welcome reviewer feedback on naming, namespace placement, and stylistic alignment with the surrounding Mathlib modules. t-measure-probability new-contributor LLM-generated awaiting-author 187/0 Mathlib.lean,Mathlib/Probability/Distance/TotalVariation.lean 2 4 ['allenhaozhu', 'github-actions', 'grunweg'] nobody
10-35667
10 days ago
11-45301
11 days ago
0-2707
45 minutes
39165 allenhaozhu
author:allenhaozhu
 feat(Probability/Moments): add IsSubExponential class Add `ProbabilityTheory.IsSubExponential X μ ν b`, the sub-exponential random variable class: `mgf X μ s ≤ exp (s²ν/2)` for `|s| < 1/b`. Mirror the structure of the existing `Mathlib/Probability/Moments/SubGaussian.lean`. Include constructor lemmas (`IsSubExponential.const`, `mono_b`, `mono_nu`) and a tail bound derived through Mathlib's `measure_ge_le_exp_mul_mgf`. --- ## AI-assistance disclosure Per the Mathlib [AI-use policy](https://leanprover-community.github.io/contribute/index.html#use-of-ai): - **Tool.** Claude Code (Anthropic) with the Claude Sonnet 4.6 model. - **Use.** I specified the target lemma statements and the proof strategy; the assistant drafted Lean 4 tactic combinations against current Mathlib. I iterated on the proofs, verified each lemma builds under `lake build` from a clean checkout, and read the final code. - **Vouching.** I have read every declaration in this file and can defend the proofs without further AI assistance. I welcome reviewer feedback on naming, namespace placement, and stylistic alignment with the surrounding Mathlib modules. t-measure-probability new-contributor LLM-generated awaiting-author 257/0 Mathlib.lean,Mathlib/Probability/Moments/SubExponential.lean 2 4 ['allenhaozhu', 'github-actions', 'grunweg'] nobody
10-35666
10 days ago
11-45309
11 days ago
0-2698
44 minutes
39168 allenhaozhu
author:allenhaozhu
 feat(Analysis/Convex/Subgradient): add subgradient characterization for |·| and ℓ¹ Add `Convex.IsAbsSubgradient x g`, the predicate that `g` is a subgradient of `|·|` at `x`. Prove the standard characterization: the only subgradient at `x > 0` is `1`; at `x < 0` it is `-1`; at `x = 0` the subgradients are exactly `[-1, 1]`. Add `IsL1Subgradient`, the componentwise lift to `Fin n → ℝ` used by ℓ¹-regularized estimation (Lasso KKT). --- ## AI-assistance disclosure Per the Mathlib [AI-use policy](https://leanprover-community.github.io/contribute/index.html#use-of-ai): - **Tool.** Claude Code (Anthropic) with the Claude Sonnet 4.6 model. - **Use.** I specified the target lemma statements and the proof strategy; the assistant drafted Lean 4 tactic combinations against current Mathlib. I iterated on the proofs, verified each lemma builds under `lake build` from a clean checkout, and read the final code. - **Vouching.** I have read every declaration in this file and can defend the proofs without further AI assistance. I welcome reviewer feedback on naming, namespace placement, and stylistic alignment with the surrounding Mathlib modules. t-analysis new-contributor LLM-generated awaiting-author 231/0 Mathlib.lean,Mathlib/Analysis/Convex/Subgradient/Abs.lean 2 4 ['allenhaozhu', 'github-actions', 'grunweg'] nobody
10-35664
10 days ago
11-45394
11 days ago
0-2608
43 minutes
38887 Rosario-Leonardi-CT
author:Rosario-Leonardi-CT
 feat(Analysis/Fourier/ZMod): add dft_star_comp Adds `ZMod.dft_star_comp`, expressing that `𝓕 (star ∘ Φ) k = star (𝓕 Φ (-k))`, the discrete analogue of the Fourier transform's interaction with complex conjugation, complementing the existing `dft_comp_neg`. --- AI disclosure: lemma statement and proof drafted with assistance from Claude Code; verified by the Lean compiler with no `sorry` and standard axioms only (`propext`, `Classical.choice`, `Quot.sound`). t-analysis new-contributor awaiting-author 9/0 Mathlib/Analysis/Fourier/ZMod.lean 1 8 ['Rosario-Leonardi-CT', 'github-actions', 'wwylele'] j-loreaux
assignee:j-loreaux
10-20662
10 days ago
14-14480
14 days ago
5-6447
5 days
35672 dennj
author:dennj
 feat(RingTheory/Polynomial/Cyclotomic): vanishing sums and fiber equidistribution at primitive roots ## Summary Building on `sum_eq_zero_iff_forall_eq` from #34592, this PR adds: - cyclotomic_dvd_of_aeval_eq_zero, exists_int_smul_cyclotomic_of_natDegree_le_totient — integer polynomials vanishing at a primitive n-th root are divisible by cyclotomic n ℤ, and (for degree ≤ φ(n)) integer multiples of it. - sum_eq_zero_iff_forall_eq and its ℤ / ZMod p variants — vanishing iff all coefficients equal. - sum_fiber_eq_sum_fiber_of_sum_weighted_pow_eq_zero, card_fiber_eq_card_div_of_sum_pow_eq_zero — fiber equidistribution. - cyclotomic_prime_coeff — the formula (cyclotomic p R).coeff i = if i < p then 1 else 0, generalising existing coeff_zero/coeff_one lemmas. - References: [deLauneyFlannery2011, Lemma 2.8.5] (underlying ℚ/ℕ fact) and [armario2024, Lemma 7 and Theorem 3] (ℤ statement and the fiber-counting application). Theorems imported from: https://github.com/Latinum-Agentic-Commerce/AlgebraicDesignTheory Human made PR with LLM used for documentation and proof golfing t-ring-theory new-contributor LLM-generated 128/2 Mathlib/RingTheory/Polynomial/Cyclotomic/Basic.lean,Mathlib/RingTheory/Polynomial/Cyclotomic/Roots.lean,docs/references.bib 3 6 ['dennj', 'github-actions', 'grunweg', 'ocfnash'] ocfnash
assignee:ocfnash
10-16645
10 days ago
17-6986
17 days ago
35-20808
35 days
39146 anovickis
author:anovickis
 feat(Analysis/CStarAlgebra/Matrix): CompactSpace instances for unitaryGroup and specialUnitaryGroup Adds `CompactSpace` instances (and supporting `IsClosed` / `IsCompact` lemmas) for the matrix unitary and special unitary groups. The compactness follows from Heine-Borel applied to the entrywise sup norm: every unitary matrix has all entries bounded by `1` (via the existing `entry_norm_bound_of_unitary` lemma), and `Matrix n n 𝕜` is finite-dimensional, so `closed + bounded ⇒ compact`. ### New declarations - `isClosed_unitaryGroup`, `isCompact_unitaryGroup` - `instance Matrix.unitaryGroup.instCompactSpace` - `isClosed_specialUnitaryGroup`, `isCompact_specialUnitaryGroup` - `instance Matrix.specialUnitaryGroup.instCompactSpace` All placed inside the existing `EntrywiseSupNorm` section in `Mathlib/Analysis/CStarAlgebra/Matrix.lean`, so the `Matrix.Norms.Elementwise` scope used for the bound is already in scope. ### Motivation These instances enable downstream constructions of compact matrix Lie groups such as flag manifolds (e.g. SU(3)/T = F₂), where the quotient inherits compactness for free via `Quotient.compactSpace`. They also fill an obvious gap in the matrix-group API: `unitary R` is known to be closed, but compactness for `Matrix.unitaryGroup` was not previously available as an instance. Claude Code / Anthropic was used for generating the code, Verification was done with lake build, each lemma reviewed. Proofs came out of F2 mass gap lean library - so compile verified t-analysis new-contributor awaiting-author 52/0 Mathlib/Analysis/CStarAlgebra/Matrix.lean 1 11 ['anovickis', 'github-actions', 'j-loreaux', 'wwylele'] nobody
9-61010
9 days ago
12-4455
12 days ago
0-7559
2 hours
39256 Sfgangloff
author:Sfgangloff
 feat(SymbolicDynamics): add monotonicity lemma for LanguageOn In Symbolic dynamics. Proof that the language of a set of configurations is monotone with respect to inclusion of configuration sets: X ⊆ Y → LanguageOn X U ⊆ LanguageOn Y U The proof is a direct unfolding of definitions: a pattern in the language of X comes from restricting some configuration x ∈ X, and inclusion X ⊆ Y allows the same witness to be used for Y. Related to issue #39252 t-dynamics new-contributor 9/1 Mathlib/Dynamics/SymbolicDynamics/Basic.lean 1 3 ['github-actions'] nobody
9-52213
9 days ago
10-27017
10 days ago
10-26729
10 days
39282 Sfgangloff
author:Sfgangloff
 feat(SymbolicDynamics): add union morphism lemma for LanguageOn In symbolic dynamics. This PR proves that taking the language over a finite shape commutes with unions of configuration sets: $LanguageOn (X \cup Y) U = LanguageOn X U \cup LanguageOn Y U$ The proof is a direct unfolding of definitions: a pattern in the language of $X \cup Y$ comes from restricting a configuration $x ∈ X \cup Y$, and splitting on whether $x \in X$ or $x \in Y$ yields the corresponding inclusion in either $LanguageOn X U$ or $LanguageOn Y U$. The converse direction rebuilds a witness in $X \cup Y$ from either side of the union. Related to issue #39252 t-dynamics new-contributor 15/1 Mathlib/Dynamics/SymbolicDynamics/Basic.lean 1 2 ['github-actions'] nobody
9-51987
9 days ago
9-52072
9 days ago
9-51784
9 days
39294 Sfgangloff
author:Sfgangloff
 feat(SymbolicDynamics): prove LanguageOn monotonicity under intersection In symbolic dynamics. This PR proves that taking the language over a finite shape is monotone with respect to intersections of configuration sets: ```math \mathrm{LanguageOn}(X \cap Y)\, U \subseteq \mathrm{LanguageOn}\, X\, U \cap \mathrm{LanguageOn}\, Y\, U ``` The proof is a direct unfolding of definitions: a pattern in the language of `X ∩ Y` comes from restricting a configuration `x ∈ X ∩ Y`. Since such an `x` belongs simultaneously to `X` and `Y`, the same restriction witness gives membership both in `LanguageOn X U` and in `LanguageOn Y U`, yielding membership in their intersection. Related to issue #39252 t-dynamics new-contributor 9/1 Mathlib/Dynamics/SymbolicDynamics/Basic.lean 1 2 ['github-actions'] nobody
9-43193
9 days ago
9-43276
9 days ago
9-42988
9 days
38606 dennj
author:dennj
 feat: preparation for Vanishing Sum of Roots of Unity Adds the Mathlib API extensions needed for an upcoming formalization of the Lam-style classification theorem for vanishing sums of roots of unity. * Mathlib/LinearAlgebra/LinearIndependent/Lemmas.lean + `exists_eq_const_of_sum_smul_eq_zero_of_sum_eq_zero_of_linearIndependent`: if `∑ vᵢ = 0` and the first `n-1` of `n` vectors are linearly independent, every linear relation has constant coefficients. * Mathlib/RingTheory/Radical/NatInt.lean + `Nat.totient_eq_div_radical_mul_totient_radical`: Euler's totient splits as `φ(n) = (n / rad n) * φ(rad n)`. * Mathlib/RingTheory/RootsOfUnity/PrimitiveRoots.lean + `IsPrimitiveRoot.sum_range_pow_mul_div_eq_zero_of_dvd`: the `d` evenly-spaced powers of a primitive `k`-th root sum to zero, for `d ∣ k` and `1 < d`. * Mathlib/NumberTheory/Cyclotomic/LinearDisjoint.lean (new) + `IsPrimitiveRoot.linearDisjoint_adjoin_pow_of_coprime`: cyclotomic subfields of coprime orders are linearly disjoint over `ℚ`. * Mathlib/NumberTheory/Cyclotomic/LinearRelations.lean (new) + `IsPrimitiveRoot.coeffs_eq_of_sum_pow_eq_zero_prime_coprime`: in the cyclotomic field of order `p * m` with `p` prime coprime to `m`, any `ℚ⟮ζ^p⟯`-linear relation among powers of `ζ^m` has all coefficients equal. --- I need these as preparation to start formalizing the theorem: Let k be a positive integer. If a finite family of complex k-th roots of unity sums to zero, then the size of the family is a non-negative integer combination of the prime divisors of k. --- Human-made PR with AI used for golfing and documentation new-contributor 219/0 Mathlib.lean,Mathlib/LinearAlgebra/LinearIndependent/Lemmas.lean,Mathlib/NumberTheory/Cyclotomic/LinearDisjoint.lean,Mathlib/NumberTheory/Cyclotomic/LinearRelations.lean,Mathlib/RingTheory/Radical/Totient.lean,Mathlib/RingTheory/RootsOfUnity/PrimitiveRoots.lean 6 3 ['github-actions', 'mathlib-merge-conflicts'] nobody
9-24153
9 days ago
9-2322
9 days ago
8-31594
8 days
39279 jayscambler
author:jayscambler
 feat(Cryptography/Sigma): Schnorr sigma protocol and signature scheme Adds `Mathlib/Cryptography/Sigma/Schnorr.lean`. New file in a new top-level directory; mathlib currently has no `Mathlib/Cryptography/`, so I've taken `Mathlib/Cryptography/Sigma/` as the natural home for sigma-protocol formalizations. The file proves the three defining properties of Schnorr's identification scheme as a sigma protocol: - `Schnorr.correct`: completeness. Honest verifier accepts honest signer's transcript. - `Schnorr.specialSoundness`: from two accepting transcripts sharing the commitment but using different challenges `c, c'`, the witness `x = (s - s') / (c - c')` is recovered. Needs `q` prime so `c - c'` is invertible in `ZMod q`. - `Schnorr.hvzkAccepts`: the HVZK simulator `g^s · (y^c)⁻¹` always yields accepting transcripts. This is the structural-correctness half of HVZK only; the distributional indistinguishability statement is a separate result and not in this PR. On top of the sigma protocol there's `Schnorr.Signature.{keyGen, sign, verify, correct}` wrapping it as a Fiat-Shamir signature scheme; `Schnorr.Signature.correct` is a one-line corollary of `Schnorr.correct`. Two auxiliary lemmas, `Schnorr.gpow_sub` and `Schnorr.gpow_mul`, bridge `ZMod q` arithmetic and group exponentiation under `Fintype.card G = q`. They're local to this file for now because the surrounding `gpow` API is itself cryptography-specific; if a general `ZMod q`-graded group action framework lands in mathlib later, both lemmas would become instances of it. There's also a small `example` instantiating everything on `Multiplicative (ZMod q)` for `Fact q.Prime` to show the API typechecks. That instantiation is a toy (DLOG is trivial in that group), but it confirms the abstraction is usable. **AI disclosure**: this PR was a collaboration between myself, Grey Haven's autocontext and Claude Opus 4.7 (Anthropic). I read each line and built locally on current master. (strawberry has three r's) new-contributor LLM-generated 352/0 Mathlib.lean,Mathlib/Cryptography/Sigma/Schnorr.lean 2 2 ['github-actions'] nobody
9-21505
9 days ago
9-21584
9 days ago
9-21786
9 days
38114 javgomzar
author:javgomzar
 feat(FinitelyPresentedGroup): add finite groups instance Add IsFinitelyPresented instance for finite groups. Co-authored-by: Hang Lu Su , Thomas Browning --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-group-theory new-contributor large-import 31/2 Mathlib/GroupTheory/FinitelyPresentedGroup.lean,Mathlib/GroupTheory/FreeGroup/Basic.lean 2 33 ['github-actions', 'javgomzar', 'kbuzzard', 'mathlib-merge-conflicts', 'plp127', 'tb65536', 'vihdzp'] mattrobball
assignee:mattrobball
9-13115
9 days ago
9-13151
9 days ago
32-10600
32 days
31662 edwin1729
author:edwin1729
 feat(Topology/Order): topological basis of scott topology on Complete… …PartialOrder --- [Zulip discussion](https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/.3E.20Algebraic.20complete.20partial.20order.20and.20domain.20theory/with/536359313) for this PR. (2/5) PRs in domain theory, proving that scott topologies over Algebraic DCPOs (`CompletePartialOrder`) are sober. The main reference is [Renata, Duality in Domain Theory](https://alyata.github.io/documents/duality_domain_theory.pdf). But the statements can also be found in the canonical text [Abramsky and Jung](https://www.cs.ox.ac.uk/people/samson.abramsky/handbook.pdf) This first PR proves two prerequisites, namely: - the specialization order induced by the scott topology corresponds to the existing order of the DCPO. Prop 3.1.5 in [Duality in Domain Theory](https://alyata.github.io/documents/duality_domain_theory.pdf) and Prop 2.3.2(1) in [Abramsky and Jung](https://www.cs.ox.ac.uk/people/samson.abramsky/handbook.pdf) - the upward closures of compact elements of the DCPO form a topological basis for the Scott Topology. Prop 3.5.2 in [Duality in Domain Theory](https://alyata.github.io/documents/duality_domain_theory.pdf) and Prop 2.3.6(2) in [Abramsky and Jung](https://www.cs.ox.ac.uk/people/samson.abramsky/handbook.pdf) - [x] depends on: #33061 **The next PR is here:** #31670 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-topology new-contributor awaiting-author 165/1 Mathlib.lean,Mathlib/Order/CompactlyGenerated/Basic.lean,Mathlib/Topology/Order/ScottTopology.lean,Mathlib/Topology/Order/ScottTopologyDCPO.lean,docs/references.bib 5 99 ['b-mehta', 'edwin1729', 'github-actions', 'mathlib-merge-conflicts', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot', 'plp127'] b-mehta
assignee:b-mehta
9-12016
9 days ago
17-13452
17 days ago
64-31147
64 days
35753 Vilin97
author:Vilin97
 feat(Topology/Algebra/Order): regular grid helpers and piecewise linear interpolation Make API for piecewise linear interpolation on regular grids. I need these to for ODE time-stepping methods, like forward Euler, and later Runge–Kutta methods. Follow-up PR: #35755 (forward Euler method convergence). I don't know if these numerical analysis ODE-solving methods even belong in mathlib. If someone could advise me on it, I would appreciate it. --- The initial proof was produced by [Aristotle](https://aristotle.harmonic.fun). The code was iteratively refined (factoring out lemmas, golfing, simplifying proofs) using Claude Code. - [ ] depends on: #38091 t-topology new-contributor LLM-generated maintainer-merge 201/0 Mathlib.lean,Mathlib/Topology/Algebra/Order/PiecewiseLinear.lean 2 59 ['Vilin97', 'YanYablonovskiy', 'adomani', 'botbaki-review', 'copilot-pull-request-reviewer', 'dagurtomas', 'eric-wieser', 'github-actions', 'grunweg', 'j-loreaux', 'mathlib-dependent-issues', 'wwylele'] j-loreaux
assignee:j-loreaux
9-8165
9 days ago
21-107
20 days ago
53-48899
53 days
37928 AlexeyMilovanov
author:AlexeyMilovanov
 refactor(Computability.Encoding): unbundle Γ and remove FinEncoding This PR unbundles the alphabet `Γ` from the `Encoding` structure and completely removes `FinEncoding`. `Encoding`: The alphabet `Γ` is now an explicit parameter: `structure Encoding (α : Type u) (Γ : Type v)`. `FinEncoding`: Removed. Finiteness is now handled via standard typeclasses (e.g., `[Fintype Γ] (e : Encoding α Γ)`). Combinators: Functions like `finEncodingPair` are simplified to `encodingPair`, dropping the `fin` prefix and `[Fintype]` requirements where no longer needed. Downstream: Mechanically updated `Mathlib.Computability` and `Mathlib.ModelTheory` to pass the explicit `Γ` and use `[Fintype Γ]` where `FinEncoding` was previously required. new-contributor maintainer-merge 87/67 Mathlib/Computability/Encoding.lean,Mathlib/ModelTheory/Encoding.lean 2 9 ['AlexeyMilovanov', 'dagurtomas', 'github-actions', 'vihdzp'] nobody
8-79376
8 days ago
15-43954
15 days ago
41-23522
41 days
36698 ghseeli
author:ghseeli
 feat(Combinatorics/Enumerative): Latin squares This PR defines Latin rectangles and Latin squares and proves an extension theorem using Hall's Marriage Theorem. ## Main results - `group_to_cayley_table`: every finite group `G` yields a `LatinSquare G G`. - `latin_rectangle_extends_one_row`: a (non-square) `LatinRectangle` extends to a `LatinRectangle` with one more row. This is an application of **Hall's Marriage Theorem**, `hallMatchingsOn.nonempty`. - `latin_rectangle_extends_to_latin_square`: a `LatinRectangle` extends to a `LatinSquare`. This is included in a new file `Combinatorics/Enumerative/LatinSquare.lean`. --- - [ ] depends on: #37190 - [ ] depends on: #37720 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor t-combinatorics blocked-by-other-PR 638/0 Mathlib.lean,Mathlib/Combinatorics/Enumerative/DoubleCounting.lean,Mathlib/Combinatorics/Enumerative/LatinSquare.lean,Mathlib/Combinatorics/Pigeonhole.lean,Mathlib/Data/Fintype/Card.lean,docs/references.bib 6 78 ['SnirBroshi', 'cjrl', 'eric-wieser', 'ghseeli', 'github-actions', 'mathlib-dependent-issues', 'vlad902'] nobody
8-76986
8 days ago
49-13206
49 days ago
16-40743
16 days
39341 drocta
author:drocta
 feat(Algebra/Colimit/DirectLimit): add DirectLimit.(NonUnital)StarAlgebra.(lift/of) maps and associated lemmas add the `of` and `lift` maps for `DirectLimit.StarAlgebra` and `DirectLimit.NonUnitalStarAlgebra`, as well as the associated lemmas, `of_f`, `lift_comp_of`, `lift_of`, and `hom_ext` for each. Also make `DirectLimit.NonUnitalAlgebra` only require `[Monoid R]` rather than `[CommSemiring R]`. --- Use of AI: I again asked ChatGPT for some advice about some things about this code. I can personally vouch for all of the code I'm submitting, and that I understand all of it. This is the third part of my project towards supporting direct limits of $C^∗$ -algebras (as I described [on Zulip](https://leanprover.zulipchat.com/#narrow/channel/113489-new-members/topic/Early.20feedback.20on.20approach.20towards.20formalizing.20UHF.20algebras.3F) ). This PR adds an import of `Mathlib.Algebra.Star.StarAlgHom` (because it needs `StarAlgHom` and `NonUnitalStarAlgHom`) replacing/encompassing the previously added imports of `Mathlib.Algebra.Star.StarRingHom` and `Mathlib.Algebra.Algebra.NonUnitalHom` (added in PR #38308 and #38672 respectively). t-algebra new-contributor
label:t-algebra$
 100/3 Mathlib/Algebra/Colimit/DirectLimit.lean 1 2 ['github-actions'] nobody
8-73928
8 days ago
8-76620
8 days ago
8-76332
8 days
39347 Sfgangloff
author:Sfgangloff
 feat(SymbolicDynamics): refactor of Pattern and shift-invariance of shape languages for subshifts ## Summary This PR refactors Pattern.mulShift in Mathlib/Dynamics/SymbolicDynamics/Basic.lean and uses the cleaner definition to prove shift-invariance of the language of a subshift on a finite shape. ## Changes Pattern.mulShift now returns a Pattern instead of a configuration (more natural). - Old type: Pattern.mulShift : Pattern A G → G → (G → A) - New type: Pattern.mulShift : Pattern A G → G → Pattern A G - The result carries its support (p.support.image (v * ·)) and the default-outside-support proof, so callers don't have to re-derive them. The [IsLeftCancelMul G] hypothesis is moved to the lemmas that actually use it. - The definition Pattern.mulShift itself no longer needs left-cancellation (it only chooses a preimage noncomputably). - The hypothesis is now stated on mulShift_config_apply_mul_left_of_mem and mulOccursInAt_eq_cylinder directly, instead of being a section-level variable. Renames following the type change. - mulShift_apply_mul_left_of_mem → mulShift_config_apply_mul_left_of_mem (because we now write (p.mulShift v).config instead of p.mulShift v). New @[simp] and @[ext] lemmas for Pattern. - Pattern.ext: two patterns are equal iff their supports agree and their configurations agree on the support. - Pattern.mulShift_support: the support of p.mulShift v is p.support.image (v * ·). - Pattern.fromConfig_support: the support of fromConfig x U is U. - Pattern.fromConfig_config_of_mem: on its support, fromConfig x U agrees with x. New lemma Pattern.fromConfig_mulShift. For a left inverse g' * g = 1, shifting the pattern fromConfig x U by g equals fromConfig (mulShift g' x) (U.image (g * ·)). New theorem MulSubshift.languageOn_image_mulShift. For a subshift Y and elements g, g' with g * g' = 1 and g' * g = 1: (fun p => p.mulShift g) '' Y.languageOn U = Y.languageOn (U.image (g * ·)) i.e. the language on the translated shape is exactly the image of the language on U under the pattern-shift map. This gives a bijection between Y.languageOn U and Y.languageOn (U.image (g * ·)), with inverse p ↦ p.mulShift g'. Stated for left-cancellative monoids with an invertible element. Updated docstrings for Pattern.mulShift and the renamed lemma to reflect the bundled-Pattern return type and clarify which results need [IsLeftCancelMul G]. t-dynamics new-contributor 142/48 Mathlib/Dynamics/SymbolicDynamics/Basic.lean 1 3 ['github-actions'] nobody
8-69328
8 days ago
8-69489
8 days ago
8-69201
8 days
37666 TJHeeringa
author:TJHeeringa
 feat(Analysis/InnerProductSpace/Reproducing): Lipschitz wrt the kernel pseudometric --- RKHSs $H$ have bounded point evaluations. This induces a pseudometric on the underlying space `X`. The function $f\in H$ are Lipschitz continuous with Lipschitz constant $\||f\||$. This PR puts the pseudometric instance inline. The instance cannot just be put outside the theorem, because that gives problems with resolving type classes / instance synthesis. An alternative to inlining the instance is a type class synonym. One copy would be the RKHS with whatever metric X came equipped with and one copy would be the RKHS with the induced metric. Since there are likely more theorems depending on this pseudometric, I suspect that it is actually a better solution. AI: I had the instance outside the theorem. Lean gave problems with resolving type classes / instance synthesis. I asked Claude and ChatGPT to interpret the error and fix it. The latter just spit gibberish and the former suggested inlining but in a way that didn't work. Then, I asked on Zulip and got the same suggestion but working. The type synonym alternative was also suggested there. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-analysis new-contributor help-wanted 71/6 Mathlib/Analysis/InnerProductSpace/Reproducing.lean 1 3 ['TJHeeringa', 'github-actions'] nobody
8-29181
8 days ago
unknown
0-0
0 seconds
33985 YellPika
author:YellPika
 feat(Order/OmegaCompletePartialOrder): `OmegaCompletePartialOrder` instance for `Sum` with basic `ωScottContinuous` lemmas This PR adds an `OmegaCompletePartialOrder` instance for `Sum`, along with `ωScottContinuous` lemmas for basic operations (`inl`, `inr`, `elim`). Appropriate lemmas are marked with `@[fun_prop]` so that the `fun_prop` tactic can automatically deduce `ωScottContinuous` proofs for functions involving `Sum`s (e.g. see the proof of `Sum.ωScottContinuous_map`). --- - [x] depends on: #33941 - [x] depends on: #37258 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor large-import t-order awaiting-author 205/3 Mathlib/Data/Sum/Basic.lean,Mathlib/Data/Sum/Order.lean,Mathlib/Order/OmegaCompletePartialOrder.lean,Mathlib/Order/ScottContinuity.lean,Mathlib/Topology/Constructions/SumProd.lean 5 58 ['Komyyy', 'Vierkantor', 'YaelDillies', 'YellPika', 'github-actions', 'mathlib-dependent-issues', 'mathlib-merge-conflicts', 'vihdzp'] YaelDillies and pechersky
assignee:pechersky assignee:YaelDillies
8-20510
8 days ago
49-26320
49 days ago
52-59724
52 days
38534 AlexeyMilovanov
author:AlexeyMilovanov
 refactor(Computability): bundle PFun into a structure with FunLike instance This PR refactors `PFun` from `def PFun α β := α → Part β` to a structure with a `FunLike` instance. [Discussion](https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/Fix.20for.20fun_prop.20on.20PFun.20.28context.3A.20Computability.20Theory.29) ### Core Architectural Changes * **Structure Transition:** `PFun` is now a structure with a single field `toFun : α → Part β`. Raw lambdas are now explicitly packed using `PFun.mk` or `PFun.lift`. * **API Alignment:** Added the `FunLike (α →. β) α (Part β)` instance and `initialize_simps_projections`. Replaced direct `funext` usage with `DFunLike.ext`. Added comprehensive `@[simp]` lemmas for the structure (`mk_apply`, `coe_mk`, `toFun_eq_coe`, `lift_apply`). * **New Helpers:** Introduced `PFun.const` and `PFun.empty` to reduce boilerplate. Updated the `Inhabited` instance to use `PFun.empty` and added the `default_eq_empty` simp lemma. * **Renaming:** Renamed `Nat.Partrec.some` to `Nat.Partrec.id` (as it now represents `PFun.id ℕ`), and `const_part_some` to `const_some` for consistency. ### API & Breaking Changes * **Loss of Defeq:** `PFun` is no longer definitionally equal to a raw function. Basic lemmas (like `PFun.res_univ`) now require explicit extensionality (`ext x y; rfl`). * **`prodLift_fst_comp_snd_comp`:** Rewrote the LHS using explicit `PFun.mk` wrappers. This resolves a `simpNF` linter failure caused by the new `comp_lift` simp lemma. * **Return Type Changes:** Several core computability definitions (`Nat.Partrec.of_eq_tot`, `StateTransition.eval`) now strictly return or pattern-match on the new structure, breaking implicit coercions. ### Downstream Impact The refactor heavily impacts Computability Theory and Category Theory (`Category/PartialFun.lean`). The strict structure boundary breaks definitional equality, meaning tactics like `simp` and `grind` can no longer "see through" the function automatically. As a result, several proofs (e.g., `fix_aux`, `ppred`, `mem_eval`, and `unitIso`) grew in size, requiring explicit `ext` + `simp` breakdowns. ### Affected Files * **Core:** `Mathlib/Data/PFun.lean` * **Computability:** `Partrec`, `PartrecBasis`, `PartrecCode`, `RE`, `RecursiveIn`, `Ackermann`, `Halting`, `StateTransition`, `TuringDegree`, `TuringMachine/Config` *(Successfully removed the `set_option linter.flexible false` hack)* * **Category Theory:** `Category/PartialFun.lean` *(Successfully removed the `respectTransparency false` hack)* * **Other:** `Data/Finset/PImage.lean`, `NumberTheory/Dioph.lean` ### Note on LLM usage The core `PFun` change caused numerous downstream errors. I initially used an LLM to help draft fixes for these files. Afterwards, I spent a significant amount of time manually correcting and modifying all of the generated changes. new-contributor t-computability awaiting-author 1172/758 Mathlib/CategoryTheory/Category/PartialFun.lean,Mathlib/Computability/Ackermann.lean,Mathlib/Computability/Halting.lean,Mathlib/Computability/Partrec.lean,Mathlib/Computability/PartrecBasis.lean,Mathlib/Computability/PartrecCode.lean,Mathlib/Computability/RE.lean,Mathlib/Computability/RecursiveIn.lean,Mathlib/Computability/StateTransition.lean,Mathlib/Computability/TuringDegree.lean,Mathlib/Computability/TuringMachine/Config.lean,Mathlib/Data/Finset/PImage.lean,Mathlib/Data/PFun.lean,Mathlib/NumberTheory/Dioph.lean 14 8 ['AlexeyMilovanov', 'dagurtomas', 'github-actions', 'j-loreaux', 'mathlib-bors', 'mathlib-merge-conflicts'] nobody
8-17984
8 days ago
8-17985
8 days ago
8-27743
8 days
37722 SabrinaJewson
author:SabrinaJewson
 feat(Order/Cover): intervals equal singletons iff To complement `Set.Icc_eq_singleton_iff`, this introduces: - `Set.Ioc_eq_singleton_iff` / `Set.Ico_eq_singleton_iff` - `Set.Ico_eq_singleton_left_iff` / `Set.Ioc_eq_singleton_right_iff` - `Set.Ioi_eq_singleton_iff` / `Set.Iio_eq_singleton_iff` - `Set.Ioi_eq_singleton_top_iff` / `Set.Iio_eq_singleton_bot_iff` - `Set.Ioo_eq_singleton_iff` --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-order new-contributor awaiting-author maintainer-merge 39/0 Mathlib/Order/Atoms.lean,Mathlib/Order/Cover.lean 2 16 ['Komyyy', 'SabrinaJewson', 'github-actions', 'mathlib-merge-conflicts'] bryangingechen
assignee:bryangingechen
8-12467
8 days ago
10-51824
10 days ago
35-12445
35 days
37071 ericluap
author:ericluap
 feat: Dedekind completion of rationals is isomorphic to EReal t-order new-contributor 128/4 Mathlib.lean,Mathlib/Data/EReal/Basic.lean,Mathlib/Data/EReal/DedekindCut.lean,Mathlib/Order/Completion.lean 4 55 ['ericluap', 'github-actions', 'vihdzp', 'wwylele'] vihdzp
assignee:vihdzp
7-76376
7 days ago
11-21217
11 days ago
34-16117
34 days
39392 jayscambler
author:jayscambler
 feat(Cryptography): one-time pad and Shannon perfect secrecy Adds `Mathlib/Cryptography/OTP.lean`. One-time pad over an arbitrary finite abelian group `G`: - `OTP.encrypt k m := m + k`, `OTP.decrypt k c := c - k`. - `OTP.correct`: `decrypt k (encrypt k m) = m`, by `abel`. - `OTP.perfect_secrecy`: for any `m₀, m₁`, the distributions of `encrypt k m₀` and `encrypt k m₁` over uniform `k` are equal; both reduce to `PMF.uniformOfFintype G`. Proof goes via `Equiv.addLeft`. Independent of the Schnorr PR (#39279); no shared definitions. Unlike everything else likely to live under `Mathlib/Cryptography/`, the security guarantee here is information-theoretic, not computational. **AI disclosure**: this PR was a collaboration between myself, Grey Haven's autocontext and Claude Opus 4.7 (Anthropic). I read each line and built locally on current master. (strawberry has three r's) new-contributor LLM-generated 76/0 Mathlib.lean,Mathlib/Cryptography/OTP.lean 2 3 ['MrBrain295', 'github-actions'] nobody
7-70457
7 days ago
8-6531
8 days ago
8-6243
8 days
39393 jayscambler
author:jayscambler
 feat(GameTheory): von Neumann minimax theorem for finite matrix games Adds `Mathlib/GameTheory/MatrixGame.lean`. Resolves the TODO at `Mathlib/Topology/Sion.lean:48` ("spell out the particular case of von Neumann theorem") by specialising `Sion.exists_isSaddlePointOn` to the bilinear payoff `∑ i j, x i * M i j * y j` on the pair of standard simplices. Two theorems: - `Matrix.exists_saddle_point`: existence of a saddle point in mathlib's `IsSaddlePointOn` convention (`a` minimiser-in-`X`, `b` maximiser-in-`Y`). - `Matrix.exists_mixedNash`: existence of a mixed Nash equilibrium in the textbook matrix-game orientation (row player maximises, column player minimises). Proved by applying Sion to `-payoff M`. Both forms are useful: the first matches mathlib's existing saddle-point machinery, and the second is the statement most game-theory texts use directly. Supporting lemmas: continuity of the payoff in each argument (linear in each), and quasi-convexity / quasi-concavity from `LinearMap.convexOn` / `LinearMap.concaveOn`. The simplex hypotheses for Sion (`Convex`, `IsCompact`, `Nonempty`) come from existing mathlib lemmas (`convex_stdSimplex`, `isCompact_stdSimplex`, `single_mem_stdSimplex`). Creates a new top-level `Mathlib/GameTheory/` directory; mathlib currently has none. A natural follow-up would be a `Mathlib/GameTheory/NormalForm.lean` for general n-player normal-form games and pure Nash equilibrium. **AI disclosure**: this PR was a collaboration between myself, Grey Haven's autocontext and Claude Opus 4.7 (Anthropic). I read each line and built locally on current master. (strawberry has three r's) t-topology new-contributor LLM-generated 216/2 Mathlib.lean,Mathlib/GameTheory/MatrixGame.lean,Mathlib/Topology/Sion.lean 3 3 ['github-actions', 'vihdzp'] nobody
7-53734
7 days ago
8-1264
8 days ago
0-355
5 minutes
22925 ggranberry
author:ggranberry
 feat(Mathlib/PlaceHolder/ToeplitzHausdorff): Toeplitz-Hausdorff --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) WIP new-contributor will-close-soon awaiting-author help-wanted t-analysis 411/0 Mathlib/PlaceHolder/ToeplitzHausdorff.lean,Mathlib/PlaceHolder/ToeplitzHausdorff_v2.lean 2 16 ['AntoineChambert-Loir', 'faenuccio', 'ggranberry', 'github-actions', 'vihdzp'] faenuccio
assignee:faenuccio
7-32261
7 days ago
431-23770
431 days ago
3-8649
3 days
39416 AlexBrodbelt
author:AlexBrodbelt
 feat(Mathlib/Tactic/Group): Improved the group tactic The `group` tactic is improved to: 1. Once simplification on the exponents is done, apply left and right cancellation. That is, to normalise expressions like `a * b = a * c` to `b * c` 2. Apply a post-processing where expression of the form `( · )^(-1)` are normalised to use the inversion notation `( · )⁻¹`. This allows immediately being able to use lemmas involving inversion which is how most lemmas are stated. There is another PR which adds some relevant tests. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-meta new-contributor 71/5 Mathlib/Tactic/Group.lean,MathlibTest/Group.lean 2 1 ['github-actions'] nobody
7-28806
7 days ago
7-28939
7 days ago
0-51
51 seconds
39270 m13683320924-hue
author:m13683320924-hue
 feat: prove strict group homs are stable under Prod.map This PR proves that strict group homomorphisms are stable under product maps. It adds an auxiliary lemma showing that the range restriction of a strict group homomorphism is an open quotient map, and uses it to prove that `MonoidHom.prodMap` preserves `Topology.IsStrictMap`. Towards #38421. t-topology new-contributor 44/0 Mathlib/Topology/Algebra/Group/Basic.lean 1 7 ['eric-wieser', 'github-actions', 'm13683320924-hue'] nobody
7-16614
7 days ago
10-6028
10 days ago
0-1401
23 minutes

PRs not into the master branch

Number Author Title Description Labels +/- Modified files (first 100) 📝 💬 All users who commented or reviewed Assignee(s) Updated Last status change total time in review
13158 erdOne
author:erdOne
 refactor(RingTheory/OreLocalization/Module): remove `LocalizedModule.mk`. --- - [x] depends on: #13151 - [ ] depends on: #13156 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-algebra blocked-by-other-PR
label:t-algebra$
 49/48 Mathlib/RingTheory/OreLocalization/Basic.lean,Mathlib/RingTheory/OreLocalization/Module.lean 2 2 ['urkud'] nobody
130-64137
4 months ago
715-38205
715 days ago
9-15083
9 days

PRs with an 'approved' review

Number Author Title Description Labels +/- Modified files (first 100) 📝 💬 All users who commented or reviewed Assignee(s) Approval(s) Updated Last status change total time in review
12608 eric-wieser
author:eric-wieser
 feat: allow `nsmul` / `zsmul` to be omitted again, with a warning --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict awaiting-author t-algebra t-meta
label:t-algebra$
 118/2 Mathlib.lean,Mathlib/Algebra/Group/Defs.lean,Mathlib/Tactic.lean,Mathlib/Tactic/DefaultFieldLinter.lean,scripts/noshake.json,test/default_field_linter.lean 6 12 ['YaelDillies', 'eric-wieser', 'fpvandoorn', 'github-actions'] nobody 1
660-49753
1 year ago
749-82172
749 days ago
0-84
1 minute
8519 eric-wieser
author:eric-wieser
 refactor(LinearAlgebra/TensorProduct): golf using `liftAddHom` This new `TensorProduct.liftAddHom` doesn't require bilinearity, only that scalar multiplication can be moved between the arguments. While in theory we only need the `AddMonoidHom` version as it offers exactly the same generality, we first provide an unbundled `liftFun` as this seems to give a sizeable performance boost if used in downstream `lift` variants. --- - [x] depends on: #8571 - [x] depends on: #8584 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict awaiting-author t-algebra
label:t-algebra$
 53/50 Mathlib/Algebra/Category/AlgebraCat/Monoidal.lean,Mathlib/LinearAlgebra/TensorProduct.lean,Mathlib/LinearAlgebra/TensorProduct/Tower.lean 3 28 ['bustercopley', 'eric-wieser', 'jcommelin', 'jjaassoonn', 'leanprover-bot', 'leanprover-community-mathlib4-bot', 'mathlib-bors'] nobody 1
660-49750
1 year ago
900-15113
900 days ago
5-6524
5 days
9146 laughinggas
author:laughinggas
 feat(Data/ZMod/Defs): Topological structure on `ZMod` Added a discrete topology structure to `ZMod n` for all `n` --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-algebra awaiting-author t-topology
label:t-algebra$
 55/3 Mathlib.lean,Mathlib/Topology/Algebra/Constructions.lean,Mathlib/Topology/Algebra/Group/Basic.lean,Mathlib/Topology/Instances/ZMod.lean,Mathlib/Topology/Maps.lean 5 61 ['YaelDillies', 'eric-wieser', 'github-actions', 'jcommelin', 'laughinggas', 'mo271', 'urkud'] nobody 1
660-49750
1 year ago
867-7841
867 days ago
7-11053
7 days
6777 adomani
author:adomani
 chore(Co*variantClass): replace eta-expanded (· * ·), (· + ·), (· ≤ ·), (· < ·) Replace `CovariantClass X X (· * ·) (· ≤ ·)` with -> `CovariantClass X X HMul.hMul LE.le` and similarly for `HAdd`, `LT`, `Contravariant`. This PR is inspired by [Issue #6646](https://github.com/leanprover-community/mathlib4/issues/6646) and, more specifically, [this comment](https://github.com/leanprover-community/mathlib4/issues/6646#issuecomment-1692792066). Note that https://github.com/leanprover/lean4/pull/2267 would make this unnecessary --- ```bash # First sed command: # the first captured pattern is `Co*variantClass ` # the second captured pattern is `` # the third captured pattern is `+` or `*` # the fourth captured pattern is `<` or `≤` # a match for `Co*variantClass (· ·) (· ·)` becomes # `Co*variantClass replaceop replaceop` # Second sed command: similar to the first, but looks for `(Function.swap (· ·))` sed -i ' s=\(Co[ntra]*variantClass \(..*\) \2 \)(· *\([+*]\) *·) (· *\([<≤]\) *·)=\1replaceop\3 replaceop\4=g s=\(Co[ntra]*variantClass \(..*\) \2 \)(\([Functio\.swap ]*\)(· *\([+*]\) *·)) (· *\([<≤]\) *·)=\1(\3replaceop\4) replaceop\5=g s=replaceop+=HAdd.hAdd=g s=replaceop\*=HMul.hMul=g s=replaceop<=LT.lt=g s=replaceop≤=LE.le=g s=\(Co[ntra]*variantClass N N\) (· \* ·) r=\1 HMul.hMul r=g s=\(Co[ntra]*variantClass N N (swap μ)\) (· ≤ ·)=\1 LE.le=g s=\(Co[ntra]*variantClass N N\) (swap (· \* ·)) r=\1 (swap HMul.hMul) r=g s=\(CovariantClass (Filter α) (Filter α)\) (· / ·) (· ≤ ·)=\1 HDiv.hDiv LE.le=g s=\(CovariantClass (Filter α) (Filter α)\) (swap (· / ·)) (· ≤ ·)=\1 (swap HDiv.hDiv) LE.le=g s=\(Co[ntra]*variantClass .* (fun x y .> . \* .)\) (· ≤ ·)=\1 LE.le=g s=\(Co[ntra]*variantClass .* (fun x y .> . \* .)\) (· < ·)=\1 LT.lt=g s=\(Co[ntra]*variantClass [^}]*\) (· ≤ ·)=\1 LE.le=g s=\(CovariantClass .* (Filter β)\) (· • ·) LE.le=\1 HSMul.hSMul LE.le=g ' $(git ls-files '*.lean') ``` [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict 703/678 Counterexamples/ZeroDivisorsInAddMonoidAlgebras.lean,Mathlib/Algebra/BigOperators/Basic.lean,Mathlib/Algebra/Bounds.lean,Mathlib/Algebra/CovariantAndContravariant.lean,Mathlib/Algebra/DirectSum/Internal.lean,Mathlib/Algebra/Group/UniqueProds.lean,Mathlib/Algebra/GroupPower/Order.lean,Mathlib/Algebra/MonoidAlgebra/Degree.lean,Mathlib/Algebra/Order/Archimedean.lean,Mathlib/Algebra/Order/Group/Abs.lean,Mathlib/Algebra/Order/Group/Defs.lean,Mathlib/Algebra/Order/Group/DenselyOrdered.lean,Mathlib/Algebra/Order/Group/MinMax.lean,Mathlib/Algebra/Order/Group/OrderIso.lean,Mathlib/Algebra/Order/Hom/Monoid.lean,Mathlib/Algebra/Order/Interval.lean,Mathlib/Algebra/Order/Kleene.lean,Mathlib/Algebra/Order/LatticeGroup.lean,Mathlib/Algebra/Order/Module.lean,Mathlib/Algebra/Order/Monoid/Basic.lean,Mathlib/Algebra/Order/Monoid/Cancel/Defs.lean,Mathlib/Algebra/Order/Monoid/Canonical/Defs.lean,Mathlib/Algebra/Order/Monoid/Defs.lean,Mathlib/Algebra/Order/Monoid/Lemmas.lean,Mathlib/Algebra/Order/Monoid/MinMax.lean,Mathlib/Algebra/Order/Monoid/NatCast.lean,Mathlib/Algebra/Order/Monoid/OrderDual.lean,Mathlib/Algebra/Order/Monoid/Prod.lean,Mathlib/Algebra/Order/Monoid/WithTop.lean,Mathlib/Algebra/Order/Monoid/WithZero/Basic.lean,Mathlib/Algebra/Order/Monoid/WithZero/Defs.lean,Mathlib/Algebra/Order/Nonneg/Ring.lean,Mathlib/Algebra/Order/Pointwise.lean,Mathlib/Algebra/Order/Positive/Ring.lean,Mathlib/Algebra/Order/Ring/Canonical.lean,Mathlib/Algebra/Order/Ring/Defs.lean,Mathlib/Algebra/Order/Ring/Lemmas.lean,Mathlib/Algebra/Order/Sub/Basic.lean,Mathlib/Algebra/Order/Sub/Canonical.lean,Mathlib/Algebra/Order/Sub/Defs.lean,Mathlib/Algebra/Order/WithZero.lean,Mathlib/Algebra/Parity.lean,Mathlib/Algebra/Star/Order.lean,Mathlib/Algebra/Tropical/Basic.lean,Mathlib/Analysis/Normed/Order/Lattice.lean,Mathlib/Data/DFinsupp/Lex.lean,Mathlib/Data/DFinsupp/Order.lean,Mathlib/Data/Finset/Fold.lean,Mathlib/Data/Finsupp/Lex.lean,Mathlib/Data/Finsupp/Order.lean,Mathlib/Data/List/BigOperators/Basic.lean,Mathlib/Data/List/BigOperators/Lemmas.lean,Mathlib/Data/Multiset/Basic.lean,Mathlib/Data/Nat/Cast/Order.lean,Mathlib/Data/PNat/Basic.lean,Mathlib/Data/Real/ENNReal.lean,Mathlib/Data/Real/NNReal.lean,Mathlib/Data/Set/Semiring.lean,Mathlib/Data/Sign.lean,Mathlib/MeasureTheory/Function/LpOrder.lean,Mathlib/MeasureTheory/Function/SimpleFuncDenseLp.lean,Mathlib/MeasureTheory/Measure/MeasureSpace.lean,Mathlib/MeasureTheory/Measure/VectorMeasure.lean,Mathlib/Order/ConditionallyCompleteLattice/Group.lean,Mathlib/Order/Filter/Basic.lean,Mathlib/Order/Filter/Pointwise.lean,Mathlib/Probability/Martingale/Basic.lean,Mathlib/Probability/Process/Stopping.lean,Mathlib/RingTheory/GradedAlgebra/Basic.lean,Mathlib/SetTheory/Cardinal/Basic.lean,Mathlib/SetTheory/Game/Basic.lean,Mathlib/SetTheory/Game/PGame.lean,Mathlib/SetTheory/Ordinal/Arithmetic.lean,Mathlib/SetTheory/Ordinal/Basic.lean,Mathlib/SetTheory/Ordinal/NaturalOps.lean,Mathlib/Tactic/GCongr/Core.lean,Mathlib/Tactic/Positivity/Basic.lean,Mathlib/Topology/ContinuousFunction/Algebra.lean,lean-toolchain,test/Recall.lean,test/propose.lean 81 37 ['adomani', 'alreadydone', 'digama0', 'eric-wieser', 'ericrbg', 'jcommelin', 'leanprover-bot', 'sgouezel', 'vihdzp'] nobody 1
660-49749
1 year ago
935-15246
935 days ago
35-63136
35 days
6403 astrainfinita
author:astrainfinita
 chore: change instance priorities of `Ordered*` hierarchy --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra t-order merge-conflict slow-typeclass-synthesis awaiting-author
label:t-algebra$
 253/79 Mathlib/Algebra/Order/CompleteField.lean,Mathlib/Algebra/Order/Field/Canonical/Defs.lean,Mathlib/Algebra/Order/Field/Defs.lean,Mathlib/Algebra/Order/Group/Defs.lean,Mathlib/Algebra/Order/Monoid/Basic.lean,Mathlib/Algebra/Order/Monoid/Canonical/Defs.lean,Mathlib/Algebra/Order/Monoid/Defs.lean,Mathlib/Algebra/Order/Monoid/WithZero/Defs.lean,Mathlib/Algebra/Order/Ring/Canonical.lean,Mathlib/Algebra/Order/Ring/Defs.lean,Mathlib/Algebra/Order/Ring/Star.lean,Mathlib/Algebra/Order/WithZero.lean,Mathlib/Analysis/InnerProductSpace/Orientation.lean,Mathlib/LinearAlgebra/Orientation.lean,Mathlib/RingTheory/HahnSeries.lean,Mathlib/RingTheory/LaurentSeries.lean,Mathlib/Tactic/Positivity/Core.lean,Mathlib/Topology/Algebra/WithZeroTopology.lean 18 39 ['Vierkantor', 'astrainfinita', 'digama0', 'eric-wieser', 'j-loreaux', 'leanprover-bot'] nobody 1
660-49748
1 year ago
905-2490
905 days ago
13-18399
13 days
12751 Command-Master
author:Command-Master
 feat: add lemmas for Nat/Bits, Nat/Bitwise and Nat/Size Remove `@[simp]` from `Nat.bit_false` and `Nat.bit_true`, as `bit0` and `bit1` are deprecated, and add some lemmas to `Bits`, `Bitwise` and `Size`. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-data new-contributor 66/7 Mathlib/Data/Nat/Bits.lean,Mathlib/Data/Nat/Bitwise.lean,Mathlib/Data/Nat/Multiplicity.lean,Mathlib/Data/Nat/Size.lean 4 26 ['Command-Master', 'Rida-Hamadani', 'Ruben-VandeVelde', 'YaelDillies', 'github-actions', 'jcommelin'] nobody 1
641-27050
1 year ago
676-33272
676 days ago
56-40668
56 days
15448 urkud
author:urkud
 chore(*): deprecate `Option.elim'` Use `Option.elim` instead. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict awaiting-author tech debt 54/50 Mathlib/Algebra/BigOperators/Option.lean,Mathlib/Algebra/MvPolynomial/Equiv.lean,Mathlib/Algebra/MvPolynomial/Variables.lean,Mathlib/Analysis/BoxIntegral/Partition/Additive.lean,Mathlib/Analysis/BoxIntegral/Partition/Basic.lean,Mathlib/Analysis/BoxIntegral/Partition/Split.lean,Mathlib/Analysis/Calculus/LagrangeMultipliers.lean,Mathlib/CategoryTheory/Category/PartialFun.lean,Mathlib/Computability/TMToPartrec.lean,Mathlib/Data/Option/Defs.lean,Mathlib/LinearAlgebra/Basis.lean,Mathlib/Logic/Embedding/Set.lean,Mathlib/Logic/Equiv/Basic.lean,Mathlib/MeasureTheory/OuterMeasure/Induced.lean,Mathlib/NumberTheory/Dioph.lean,Mathlib/Topology/Compactness/Paracompact.lean,Mathlib/Topology/LocallyFinite.lean 17 12 ['Ruben-VandeVelde', 'YaelDillies', 'github-actions', 'grunweg', 'urkud'] nobody 1
641-16103
1 year ago
650-62265
650 days ago
7-18420
7 days
13514 madvorak
author:madvorak
 feat(Computability/ContextFreeGrammar): closure under union - [ ] depends on: #15895 --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-computability blocked-by-other-PR 448/4 Mathlib/Computability/ContextFreeGrammar.lean 1 50 ['Rida-Hamadani', 'YaelDillies', 'github-actions', 'leanprover-community-mathlib4-bot', 'madvorak'] nobody 1
566-42907
1 year ago
644-16888
644 days ago
72-28417
72 days
12133 ADedecker
author:ADedecker
 feat: generalize instIsLowerProd to arbitrary products Also change a bit the proof of the product case to match my own taste, feel free to tell if you prefer the old one. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict awaiting-author t-topology t-order 34/14 Mathlib/Topology/Constructions.lean,Mathlib/Topology/Order/LowerUpperTopology.lean 2 13 ['Ruben-VandeVelde', 'TwoFX', 'github-actions', 'jcommelin', 'mans0954', 'mathlib-bors', 'riccardobrasca'] nobody 2
553-48955
1 year ago
704-44591
704 days ago
63-69226
63 days
18461 hannahfechtner
author:hannahfechtner
 feat: left and right common multiples mixins add mixins for left and right common multiples. These carry the data of what factors are used to create the common multiples --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) awaiting-author t-algebra new-contributor
label:t-algebra$
 78/0 Mathlib/Algebra/Group/Defs.lean 1 13 ['github-actions', 'hannahfechtner', 'jcommelin', 'kbuzzard', 'kim-em', 'trivial1711'] nobody 1
487-45422
1 year ago
487-45422
487 days ago
69-35596
69 days
2605 eric-wieser
author:eric-wieser
 chore: better error message in linarith On this mwe: ```lean import Mathlib.Tactic.Linarith example (s : Set ℕ) (h : s = s) : 0 ≤ 1 := by linarith ``` this now indicates where the internal error is coming from. Is there a better way of chaining errors than this? --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict awaiting-author t-meta 12/1 Mathlib/Tactic/Linarith/Preprocessing.lean 1 3 ['Vierkantor', 'harahu', 'kim-em', 'mo271'] nobody 1
477-27442
1 year ago
1124-58981
1124 days ago
51-42225
51 days
19425 hrmacbeth
author:hrmacbeth
 perf: gcongr forward-reasoning adjustment This PR changes the "forward-reasoning" component of `gcongr`, rendering it more efficient, particularly in problems with a large number of variables/hypotheses in the context. Previously `gcongr` attempted to match *every* `LocalDecl` against *every* node in the parse tree using *each* of the five implemented `@[gcongr_forward]` mini-tactics: matching directly, matching after applying `symm`, matching after applying `le_of_lt`, etc etc. The new algorithm filters out the non-Prop `LocalDecl`s, and also adjusts the `@[gcongr_forward]` extensions so that, rather than re-apply the relevant lemmas (`symm`, `le_of_lt`, etc) at every node in the parse tree, the lemmas are applied in advance to the `LocalDecl`s and the result (if successful) stored. The performance effect on mathlib as a whole is miniscule, but it speeds up the profiler's count of "tactic execution of Mathlib.Tactic.GCongr" in the newly-added test from 257 ms to 47 ms, and has a similar effect on real-life examples in an analysis project of mine. Co-authored-by: Mario Carneiro --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) (Note that Mario provided the ideas but not the code, so please review with appropriate diligence!) merge-conflict awaiting-author 130/59 Mathlib/Order/Lattice.lean,Mathlib/Tactic/GCongr/Core.lean,Mathlib/Tactic/GCongr/ForwardAttr.lean,MathlibTest/GCongr/inequalities.lean 4 17 ['Vierkantor', 'github-actions', 'hrmacbeth', 'leanprover-bot', 'leanprover-community-bot-assistant'] Vierkantor
assignee:Vierkantor
 1
407-43804
1 year ago
540-32221
540 days ago
1-41769
1 day
19315 quangvdao
author:quangvdao
 feat(Data/Finsupp/Fin): Add `Finsupp` operations on `Fin` tuple This PR adds more analogues of operations on `Fin` tuples to the `Finsupp` setting. Before, there were only `Finsupp.cons` and `Finsupp.tail`. Now there are also `Finsupp.snoc`, `Finsupp.insertNth`, `Finsupp.init`, and `Finsupp.removeNth`. These all come with supporting lemmas. I also removed the porting comment about `succAboveCases` in `Data/Fin/Basic`, and added a lemma about `succAbove` in `Data/Fin/Tuple/Basic`. --- - [x] depends on: #20361 - [x] depends on: #20771 - [x] depends on: #20770 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict awaiting-author t-data 193/16 Mathlib/Algebra/BigOperators/Fin.lean,Mathlib/Algebra/BigOperators/Finsupp.lean,Mathlib/Algebra/MvPolynomial/Equiv.lean,Mathlib/Data/Finsupp/Fin.lean,Mathlib/RingTheory/MvPolynomial/Homogeneous.lean,scripts/nolints_prime_decls.txt 6 44 ['YaelDillies', 'github-actions', 'j-loreaux', 'kbuzzard', 'mathlib4-dependent-issues-bot', 'quangvdao'] nobody 1
381-409
1 year ago
458-25432
458 days ago
43-80684
43 days
21276 GabinKolly
author:GabinKolly
 feat(ModelTheory/Substructures): define equivalences between equal substructures Define first-order equivalences between equal substructures, and prove related properties. --- This is some preparatory work for #18876 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) awaiting-author t-logic 62/0 Mathlib/ModelTheory/Substructures.lean 1 19 ['GabinKolly', 'YaelDillies', 'fpvandoorn', 'github-actions', 'grunweg'] nobody 1
378-18483
1 year ago
378-18483
378 days ago
46-55730
46 days
25401 digama0
author:digama0
 feat(Util): SuppressSorry option See also leanprover/lean4#8611 and [#lean4 > Silent sorry @ 💬](https://leanprover.zulipchat.com/#narrow/channel/270676-lean4/topic/Silent.20sorry/near/503537964). This is a stop-gap solution while leanprover/lean4#8611 is underway, but it works about as well as any other built in option. Hooking declaration elaborators turns out to be a very powerful technique. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-meta 342/0 Mathlib.lean,Mathlib/Util/CommandElabHook.lean,Mathlib/Util/SuppressSorry.lean,MathlibTest/suppressSorry.lean 4 15 ['digama0', 'eric-wieser', 'github-actions', 'mathlib4-merge-conflict-bot'] alexjbest
assignee:alexjbest
 1
281-81271
9 months ago
281-81271
281 days ago
71-27957
71 days
26078 kckennylau
author:kckennylau
 feat(AlgebraicGeometry): add x, y, px, py for points on elliptic curves --- Split from #25218. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) awaiting-author t-algebraic-geometry 44/0 Mathlib/AlgebraicGeometry/EllipticCurve/Affine/Point.lean 1 12 ['MichaelStollBayreuth', 'Multramate', 'acmepjz', 'dagurtomas', 'github-actions', 'kckennylau'] nobody 1
274-24487
9 months ago
274-24487
274 days ago
64-11252
64 days
26462 PSchwahn
author:PSchwahn
 feat(LinearAlgebra/Projection): add results about inverse of `Submodule.prodEquivOfIsCompl` Add two theorems `Submodule.prodEquivOfIsCompl_symm_apply` and `Submodule.prodEquivOfIsCompl_symm_add`, which are API for `Submodule.prodEquivOfIsCompl`. We believe these theorems are useful; for example, we have used their statements in a [classification formalization project](https://github.com/LieLean/LowDimSolvClassification). Co-authored by: - [Viviana del Barco](https://github.com/vdelbarc) - [Gustavo Infanti](https://github.com/GuQOliveira) - [Exequiel Rivas](https://github.com/erivas) --- I am not sure whether the `prodEquivOfIsCompl_symm_apply` theorem should be tagged with `@[simp]`; this might lead to confluence issues. Opinions are welcome! [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) awaiting-author t-algebra new-contributor
label:t-algebra$
 10/0 Mathlib/LinearAlgebra/Projection.lean 1 7 ['PSchwahn', 'github-actions', 'joelriou', 'kckennylau'] joelriou
assignee:joelriou
 1
255-79874
8 months ago
256-24577
256 days ago
73-43082
73 days
27937 madvorak
author:madvorak
 feat(Logic/Basic): `congr_heq₂` --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) awaiting-author t-logic 6/0 Mathlib/Logic/Basic.lean 1 8 ['YaelDillies', 'fpvandoorn', 'github-actions', 'madvorak', 'vihdzp'] fpvandoorn
assignee:fpvandoorn
 1
247-43813
8 months ago
273-44598
273 days ago
17-62644
17 days
21950 erdOne
author:erdOne
 feat(NumberTheory/Padics): the completion of `ℚ` at a finite place is `ℚ_[p]` --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-number-theory 253/1 Mathlib.lean,Mathlib/Algebra/GroupWithZero/WithZero.lean,Mathlib/NumberTheory/Padics/HeightOneSpectrum.lean,Mathlib/NumberTheory/Padics/PadicNumbers.lean,Mathlib/Topology/Algebra/Valued/WithVal.lean,Mathlib/Topology/Algebra/WithZeroMulInt.lean,Mathlib/Topology/Algebra/WithZeroTopology.lean 7 33 ['Ruben-VandeVelde', 'erdOne', 'faenuccio', 'github-actions', 'leanprover-community-bot-assistant', 'pechersky', 'smmercuri', 'xroblot'] nobody 1
238-27327
7 months ago
319-27264
319 days ago
73-10873
73 days
26330 Timeroot
author:Timeroot
 feat: "Junk value" test file This PR continues the work from #25173. Original PR: https://github.com/leanprover-community/mathlib4/pull/25173 awaiting-author t-data 360/0 MathlibTest/Junk.lean 1 17 ['SnirBroshi', 'Timeroot', 'bryangingechen', 'github-actions', 'leanprover-community-bot-assistant', 'madvorak', 'pechersky', 'vihdzp'] pechersky
assignee:pechersky
 2
234-71054
7 months ago
234-71054
234 days ago
48-67789
48 days
27302 tristan-f-r
author:tristan-f-r
 feat(Fintype/Quotient): finLiftOn₂ The combination of [`Quotient.finLiftOn`](https://leanprover-community.github.io/mathlib4_docs/Mathlib/Data/Fintype/Quotient.html#Quotient.finLiftOn) and [`liftOn₂`](https://leanprover-community.github.io/mathlib4_docs/Init/Core.html#Quotient.liftOn%E2%82%82). --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) awaiting-author t-data 19/0 Mathlib/Data/Fintype/Quotient.lean 1 12 ['github-actions', 'kckennylau', 'pechersky', 'tristan-f-r', 'vihdzp'] pechersky
assignee:pechersky
 2
218-61814
7 months ago
218-61814
218 days ago
6-5358
6 days
28925 grunweg
author:grunweg
 chore: remove `linear_combination'` tactic When `linear_combination` was refactored in #15899, the old code was kept as the `linear_combination'` tactic, for easier migration. The consensus of the zulip discussion ([#mathlib4 > Narrowing the scope of `linear_combination` @ 💬](https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/Narrowing.20the.20scope.20of.20.60linear_combination.60/near/470237816)) was to wait, and "revisit this once people have experienced the various tactics in practice". One year later, the old tactic has almost no uses: it is unused in mathlib; [searching on github](https://github.com/search?q=linear_combination%27%20path%3A*.lean&type=code) yields 37 hits --- all of which are in various forks of mathlib. Thus, removing this tactic seems appropriate. --- Do not merge before the zulip discussion has concluded! [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict file-removed awaiting-zulip 0/564 Mathlib.lean,Mathlib/Tactic.lean,Mathlib/Tactic/LinearCombination'.lean,Mathlib/Tactic/Linter/UnusedTactic.lean,MathlibTest/linear_combination'.lean 5 4 ['euprunin', 'github-actions', 'grunweg', 'mathlib4-merge-conflict-bot'] nobody 1
218-56890
7 months ago
270-2287
270 days ago
0-1
1 second
28737 astrainfinita
author:astrainfinita
 refactor: deprecate `MulEquivClass` This PR continues the work from #18806. Original PR: https://github.com/leanprover-community/mathlib4/pull/18806 merge-conflict awaiting-author t-algebra
label:t-algebra$
 67/77 Mathlib/Algebra/BigOperators/Finprod.lean,Mathlib/Algebra/Group/Equiv/Basic.lean,Mathlib/Algebra/Group/Equiv/Defs.lean,Mathlib/Algebra/Group/Irreducible/Lemmas.lean,Mathlib/Algebra/Group/Subgroup/Map.lean,Mathlib/Algebra/Group/Submonoid/Operations.lean,Mathlib/Algebra/Group/Units/Equiv.lean,Mathlib/Algebra/GroupWithZero/Equiv.lean,Mathlib/Algebra/GroupWithZero/NonZeroDivisors.lean,Mathlib/Algebra/Module/Equiv/Defs.lean,Mathlib/Algebra/Order/CauSeq/Basic.lean,Mathlib/Algebra/Order/Hom/Monoid.lean,Mathlib/Algebra/Prime/Lemmas.lean,Mathlib/Algebra/Ring/Divisibility/Basic.lean,Mathlib/Algebra/Ring/Equiv.lean,Mathlib/Algebra/Star/MonoidHom.lean,Mathlib/Combinatorics/Additive/FreimanHom.lean,Mathlib/GroupTheory/GroupExtension/Defs.lean,Mathlib/GroupTheory/Submonoid/Center.lean,Mathlib/LinearAlgebra/FreeModule/Finite/CardQuotient.lean,Mathlib/RingTheory/Bialgebra/Equiv.lean,Mathlib/RingTheory/Ideal/Norm/AbsNorm.lean,Mathlib/RingTheory/Multiplicity.lean,Mathlib/RingTheory/UniqueFactorizationDomain/NormalizedFactors.lean,Mathlib/Topology/Algebra/ContinuousMonoidHom.lean,Mathlib/Topology/Algebra/InfiniteSum/Basic.lean 26 20 ['Vierkantor', 'alreadydone', 'astrainfinita', 'github-actions', 'grunweg', 'leanprover-bot', 'leanprover-community-mathlib4-bot', 'mathlib4-merge-conflict-bot'] Vierkantor
assignee:Vierkantor
 1
206-47372
6 months ago
270-7545
270 days ago
2-39213
2 days
27180 ADedecker
author:ADedecker
 feat: quotient of a monoid with zero by a multiplicative congruence --- My motivation is getting a more conceptual construction of [ValuativeRel.ValueGroupWithZero](https://leanprover-community.github.io/mathlib4_docs/Mathlib/RingTheory/Valuation/ValuativeRel.html#ValuativeRel.ValueGroupWithZero), but I think this is of independent interest. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-algebra delegated
label:t-algebra$
 141/26 Mathlib.lean,Mathlib/Data/Quot.lean,Mathlib/Data/Setoid/Basic.lean,Mathlib/GroupTheory/Congruence/Defs.lean,Mathlib/GroupTheory/Congruence/GroupWithZero.lean 5 32 ['ADedecker', 'eric-wieser', 'github-actions', 'mathlib-bors', 'mathlib4-merge-conflict-bot', 'ocfnash'] ocfnash
assignee:ocfnash
 1
203-30628
6 months ago
282-46163
282 days ago
28-12053
28 days
9352 chenyili0818
author:chenyili0818
 feat: arithmetic lemmas for `gradient` This file is based on Mathlib.Analysis.Calculus.Gradient.Basic, and describes the calculation properties Co-authored-by: Ziyu Wang [tropicalfish910@gmail.com](mailto:tropicalfish910@gmail.com) --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict awaiting-author t-analysis 404/0 Mathlib.lean,Mathlib/Analysis/Calculus/Gradient/Lemmas.lean 2 31 ['chenyili0818', 'github-actions', 'jcommelin', 'mathlib4-merge-conflict-bot', 'sgouezel', 'winstonyin'] nobody 1
184-52466
6 months ago
822-30915
822 days ago
52-1358
52 days
11890 adomani
author:adomani
 feat: the terminal refine linter A linter that warns on usages of `refine` and `refine'` as a finishing tactic. See this [Zulip discussion](https://leanprover.zulipchat.com/#narrow/stream/287929-mathlib4/topic/Usage.20of.20refine'). ### Conclusion of the experiment Systematic replacements of terminal `refine` with `exact` leads to an overall slow-down. --- - [ ] depends on: #15616 (disable the linter in downstream projects) [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-linter awaiting-author 77/0 Mathlib.lean,Mathlib/Tactic.lean,Mathlib/Tactic/Linter/TerminalRefineLinter.lean 3 15 ['adomani', 'github-actions', 'grunweg', 'joneugster', 'leanprover-bot', 'leanprover-community-mathlib4-bot', 'mathlib4-merge-conflict-bot', 'urkud'] nobody 1
184-52335
6 months ago
647-441
647 days ago
18-28993
18 days
20924 tomaz1502
author:tomaz1502
 feat(Computability/QueryComplexity): Oracle-based computation This PR adds the types and lemmas for oracle-based computation. In this model, computations are run on a monad which also counts the number of oracle queries executed. With it, it becomes possible to reason about the upper bound of the query complexity of algorithms. In the future, we could extend this work to include the necessary bits from information theory and probability to also reason about lower bounds on query complexity, like the work in https://github.com/girving/debate. Zulip discussion: https://leanprover.zulipchat.com/#narrow/channel/144837-PR-reviews/topic/.2318629.20runtime.20complexity.20of.20sorting.20a.20list Co-authored-by: Geoffrey Irving --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-computability 305/0 Mathlib.lean,Mathlib/Computability/QueryComplexity/Basic.lean,Mathlib/Computability/QueryComplexity/Defs.lean 3 60 ['eric-wieser', 'girving', 'github-actions', 'mathlib4-merge-conflict-bot', 'quangvdao', 'tomaz1502'] nobody 1
184-51901
6 months ago
453-73196
453 days ago
27-32630
27 days
21624 sinhp
author:sinhp
 feat(CategoryTheory): The (closed) monoidal structure on the product category of families of (closed) monoidal categories Given a family of closed monoidal categories, we show that the product of these categories is a closed monoidal category with the pointwise monoidal structure. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict awaiting-author t-category-theory 144/0 Mathlib.lean,Mathlib/CategoryTheory/Pi/Basic.lean,Mathlib/CategoryTheory/Pi/Monoidal.lean,Mathlib/CategoryTheory/Pi/MonoidalClosed.lean 4 20 ['TwoFX', 'YaelDillies', 'b-mehta', 'github-actions', 'jcommelin', 'mathlib4-merge-conflict-bot', 'sinhp'] nobody 1
184-51891
6 months ago
409-66133
409 days ago
50-48893
50 days
22159 shetzl
author:shetzl
 feat: add definition of pushdown automata Add the definition of pushdown automata and their two acceptance conditions: acceptance based on empty stack and acceptance based on final state. Co-authored-by: Tobias Leichtfried --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-computability awaiting-author new-contributor 70/0 Mathlib.lean,Mathlib/Computability/PDA.lean 2 35 ['YaelDillies', 'github-actions', 'madvorak', 'mathlib4-merge-conflict-bot', 'shetzl'] nobody 1
184-51759
6 months ago
431-45772
431 days ago
20-81245
20 days
22919 plp127
author:plp127
 feat(Data/Fintype/Pi): Make `Fintype` instance for `RelHom`s computable Makes the `Fintype` instance for rel homs computable. See this [Zulip](https://leanprover.zulipchat.com/#narrow/channel/113489-new-members/topic/Classical.20vs.20constructive.20logic.20in.20computation/near/496220816) message. --- - [x] depends on: #24748 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict awaiting-author t-data 178/44 Mathlib/Combinatorics/SimpleGraph/Basic.lean,Mathlib/Combinatorics/SimpleGraph/Coloring.lean,Mathlib/Combinatorics/SimpleGraph/Maps.lean,Mathlib/Data/Fintype/CardEmbedding.lean,Mathlib/Data/Fintype/Pi.lean 5 31 ['IvanRenison', 'b-mehta', 'eric-wieser', 'fpvandoorn', 'github-actions', 'leanprover-community-bot-assistant', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot', 'plp127'] b-mehta
assignee:b-mehta
 1
184-51733
6 months ago
358-65004
358 days ago
71-41637
71 days
26914 quangvdao
author:quangvdao
 feat(Data/PFunctor/Univariate): more definitions for univariate `PFunctor` This PR defines several basic definitions of `PFunctor`, including zero, one, constants, monomials, coproduct (sum), product, sigma, pi, tensor product, universe lifting, and equivalence. We also add: (1) simple lemmas connecting the basic definitions, (2) an automatically derived ext lemma for `PFunctor` via `@[ext]` attribute Some things I'm not clear on: - I define `HAdd` and `HMul` instances for coproduct and product of poly functors having different universe levels. Should I also define `Add` and `Mul` instances for poly functors having the same universe level? - Is it ok to define notation for tensor product, i.e. `@[inherit_doc] scoped infixr:80 " ⊗ " => tensor`? I'm worried it might clash with other notation. - Need a double-check on the priority of notation. Some future definitions to add: - Various equivalences arising from arithmetic identities, e.g., `P + 0 ≃ₚ P`. - Definitions of Lenses and Charts (each of them will be a file or even a folder) - Exponential objects (corresponding to both `prod` and `tensor`) --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-data 144/5 Mathlib/Data/PFunctor/Univariate/Basic.lean 1 20 ['alexkeizer', 'eric-wieser', 'github-actions', 'mathlib4-merge-conflict-bot', 'quangvdao'] eric-wieser
assignee:eric-wieser
 1
184-51049
6 months ago
184-51050
184 days ago
133-23955
133 days
27163 pechersky
author:pechersky
 feat(Topology/ValuativeRel): of and to basis of compatible valuations --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) - [x] depends on: #30262 t-number-theory t-algebra merge-conflict awaiting-author t-topology
label:t-algebra$
 229/62 Mathlib/NumberTheory/LocalField/Basic.lean,Mathlib/Order/Filter/Bases/Basic.lean,Mathlib/Topology/Algebra/Valued/ValuativeRel.lean 3 73 ['erdOne', 'github-actions', 'kckennylau', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot', 'pechersky', 'smmercuri'] alreadydone
assignee:alreadydone
 1
184-51032
6 months ago
185-82823
185 days ago
84-31691
84 days
28325 pechersky
author:pechersky
 feat(WithZeroTopology): `locallyCompactSpace_iff_locallyFiniteOrder_units` On the way to golf/generalize the proof that locally compact valued fields have locally finite valuation groups as embodied in `Valued.integer.locallyFiniteOrder_units_mrange_of_isCompact_integer` ] --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-topology t-order large-import 81/2 Mathlib/Topology/Algebra/GroupWithZero.lean,Mathlib/Topology/Algebra/WithZeroTopology.lean,Mathlib/Topology/Compactness/Compact.lean 3 13 ['erdOne', 'github-actions', 'kckennylau', 'mathlib4-merge-conflict-bot', 'ocfnash'] PatrickMassot
assignee:PatrickMassot
 1
184-50737
6 months ago
189-19015
189 days ago
93-41632
93 days
28871 JaafarTanoukhi
author:JaafarTanoukhi
 feat(Combinatorics/Digraph): Tournaments Define orientations and tournaments. Related to #26771. Co-authored-by: Rida Hamadani --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-combinatorics new-contributor 62/0 Mathlib.lean,Mathlib/Combinatorics/Digraph/Orientation.lean,Mathlib/Combinatorics/Digraph/Tournament.lean 3 6 ['JaafarTanoukhi', 'Rida-Hamadani', 'SnirBroshi', 'github-actions', 'mathlib4-merge-conflict-bot'] kmill
assignee:kmill
 1
184-50591
6 months ago
184-50592
184 days ago
55-54919
55 days
11800 JADekker
author:JADekker
 feat: KappaLindelöf spaces Define KappaLindelöf spaces by following the first one-third of the API for Lindelöf spaces. The remainder will be added in a future PR. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) please-adopt merge-conflict t-topology awaiting-zulip 301/2 Mathlib.lean,Mathlib/Topology/Compactness/KappaLindelof.lean,Mathlib/Topology/Compactness/Lindelof.lean 3 38 ['ADedecker', 'JADekker', 'PatrickMassot', 'StevenClontz', 'adomani', 'github-actions', 'grunweg', 'kim-em', 'urkud'] nobody 1
184-23771
6 months ago
659-44053
659 days ago
123-25636
123 days
26310 kckennylau
author:kckennylau
 feat: binary forms This PR provides the basic definition of binary forms, which are homogeneous polynomials in two variables. --- - [ ] depends on: #26312 - [ ] depends on: #26313 - [ ] depends on: #26314 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict awaiting-author t-algebra
label:t-algebra$
 73/0 Mathlib.lean,Mathlib/RingTheory/MvPolynomial/BinaryForm.lean 2 14 ['MichaelStollBayreuth', 'github-actions', 'kckennylau', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot', 'ocfnash'] ocfnash
assignee:ocfnash
 1
184-23183
6 months ago
276-20204
276 days ago
57-1096
57 days
24514 b-mehta
author:b-mehta
 chore(Int/GCD): use fuel in xgcd Modify the definition of xgcd to use fuel recursion, to allow it to be reduced in the kernel. As a consequence, this means the evaluation of field operations in ZMod p become provable by `rfl` and `decide`. Zulip discussion: https://leanprover.zulipchat.com/#narrow/channel/270676-lean4/topic/opaque.20recursion.20definitions.20break.20mergeSort.20decidability --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) awaiting-author t-data merge-conflict 44/22 Mathlib/Data/Int/GCD.lean 1 6 ['astrainfinita', 'b-mehta', 'eric-wieser', 'github-actions', 'mathlib4-merge-conflict-bot', 'nomeata', 'urkud'] nobody 1
176-38991
5 months ago
327-78869
327 days ago
58-34020
58 days
28057 plp127
author:plp127
 feat(SuccOrder): simp lemma to refold `Order.succ` and `Order.pred` Adds `SuccOrder.succ_eq_succ` and `PredOrder.pred_eq_pred` to refold `SuccOrder.succ` and `PredOrder.pred` into `Order.succ` and `Order.pred`. These lemmas are marked `@[simp]`. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) awaiting-author t-order merge-conflict 8/2 Mathlib/Order/SuccPred/Basic.lean 1 4 ['YaelDillies', 'github-actions', 'mathlib4-merge-conflict-bot', 'plp127', 'vihdzp'] bryangingechen
assignee:bryangingechen
 1
167-72120
5 months ago
245-1428
245 days ago
44-13238
44 days
26912 pechersky
author:pechersky
 chore(Algebra/Ring/Subring): simp tag `Subring.smul_def` s-multiplying by a subtype is easiest to manipulate when both terms are in the ambient type. Many places that had to use the _def lemma for a rewrite, or to include it in a simp set, no longer have to. Ported from #25308 --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) I found this being not-simp frustrating when talking about submodules over a valuation subring. merge-conflict t-algebra
label:t-algebra$
 67/66 Mathlib/Algebra/Algebra/Subalgebra/Basic.lean,Mathlib/Algebra/Field/Subfield/Basic.lean,Mathlib/Algebra/Group/Subgroup/Actions.lean,Mathlib/Algebra/Group/Submonoid/MulAction.lean,Mathlib/Algebra/Module/LocalizedModule/Basic.lean,Mathlib/Algebra/Module/LocalizedModule/Exact.lean,Mathlib/Algebra/Module/LocalizedModule/IsLocalization.lean,Mathlib/Algebra/Module/LocalizedModule/Submodule.lean,Mathlib/Algebra/Ring/Periodic.lean,Mathlib/Algebra/Ring/Subring/Basic.lean,Mathlib/Algebra/Ring/Subsemiring/Basic.lean,Mathlib/Analysis/CStarAlgebra/Basic.lean,Mathlib/FieldTheory/KummerExtension.lean,Mathlib/GroupTheory/GroupAction/Defs.lean,Mathlib/GroupTheory/GroupAction/MultiplePrimitivity.lean,Mathlib/GroupTheory/GroupAction/MultipleTransitivity.lean,Mathlib/GroupTheory/GroupAction/SubMulAction/OfFixingSubgroup.lean,Mathlib/GroupTheory/GroupAction/SubMulAction/OfStabilizer.lean,Mathlib/LinearAlgebra/RootSystem/Irreducible.lean,Mathlib/LinearAlgebra/RootSystem/WeylGroup.lean,Mathlib/RingTheory/Etale/Kaehler.lean,Mathlib/RingTheory/Ideal/Over.lean,Mathlib/RingTheory/LocalProperties/Projective.lean,Mathlib/RingTheory/Localization/InvSubmonoid.lean,Mathlib/RingTheory/OreLocalization/Basic.lean 25 26 ['artie2000', 'eric-wieser', 'github-actions', 'j-loreaux', 'kckennylau', 'leanprover-bot', 'leanprover-radar', 'linesthatinterlace', 'mathlib4-merge-conflict-bot', 'pechersky'] joelriou
assignee:joelriou
 1
157-82756
5 months ago
179-32305
179 days ago
63-23787
63 days
32889 artie2000
author:artie2000
 feat(Algebra): forgetful lemmas for `map` and `comap` on substructures * Standardise the form of forgetful lemmas for `map` and `comap` (ie, `(co)map_toSubfoo`) * Add missing lemmas of this form * Mark all such lemmas as `simp` --- - [x] depends on: #21031 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra awaiting-author merge-conflict blocked-by-other-PR
label:t-algebra$
 72/17 Mathlib/Algebra/Algebra/NonUnitalSubalgebra.lean,Mathlib/Algebra/Algebra/Subalgebra/Basic.lean,Mathlib/Algebra/Group/Subgroup/Map.lean,Mathlib/Algebra/Module/Submodule/Map.lean,Mathlib/Algebra/Ring/Subsemiring/Basic.lean,Mathlib/Algebra/Star/Subalgebra.lean 6 30 ['YaelDillies', 'artie2000', 'github-actions', 'mathlib-dependent-issues', 'mathlib4-merge-conflict-bot', 'vihdzp'] nobody 1
146-28729
4 months ago
156-3276
156 days ago
2-56660
2 days
33381 urkud
author:urkud
 feat: add a version of the Schwarz lemma Add a version of the Schwarz lemma that is midway between the original lemma and Pick's version. Use it to show that a function that is separately holomorphic on a polydisc and is bounded on this polydisc must be continuous on it. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) - [ ] depends on: #33368 - [x] depends on: #33362 t-analysis blocked-by-other-PR merge-conflict 475/91 Mathlib.lean,Mathlib/Analysis/Complex/Schwarz.lean,Mathlib/Analysis/Complex/UnitDisc/Basic.lean,Mathlib/Analysis/Complex/UnitDisc/Schwarz.lean,Mathlib/Analysis/Complex/UnitDisc/Shift.lean 5 22 ['girving', 'github-actions', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot', 'urkud'] nobody 1
142-59162
4 months ago
144-27642
144 days ago
0-947
15 minutes
17176 arulandu
author:arulandu
 feat: integrals and integrability with .re Lemmas for swapping order of .re and integration/integrability. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict awaiting-author new-contributor t-measure-probability please-adopt 49/0 Mathlib/MeasureTheory/Function/L1Space.lean,Mathlib/MeasureTheory/Integral/IntegrableOn.lean,Mathlib/MeasureTheory/Integral/IntervalIntegral.lean,Mathlib/MeasureTheory/Integral/SetIntegral.lean 4 32 ['EtienneC30', 'arulandu', 'github-actions', 'loefflerd'] nobody 1
137-7336
4 months ago
584-54573
584 days ago
9-73631
9 days
25905 mans0954
author:mans0954
 feat(RingTheory/Polynomial/SmallDegreeVieta): polynomial versions of results in Algebra.QuadraticDiscriminant This PR continues the work from #25605. Original PR: https://github.com/leanprover-community/mathlib4/pull/25605 merge-conflict t-ring-theory please-adopt 77/8 Mathlib/Algebra/Polynomial/Coeff.lean,Mathlib/RingTheory/Polynomial/SmallDegreeVieta.lean 2 47 ['chrisflav', 'github-actions', 'kckennylau', 'mans0954', 'mathlib4-merge-conflict-bot', 'ocfnash'] chrisflav
assignee:chrisflav
 1
131-82629
4 months ago
258-24608
258 days ago
82-4874
82 days
12934 grunweg
author:grunweg
 chore: replace more uses of > or ≥ by < or ≤ These were flagged by the linter in https://github.com/leanprover-community/mathlib4/pull/12879: it is easy to simple avoid > or ≥ in hypotheses or haves. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict awaiting-author help-wanted 41/42 Archive/Imo/Imo1962Q1.lean,Archive/Imo/Imo1988Q6.lean,Archive/Imo/Imo1994Q1.lean,Archive/Imo/Imo2005Q3.lean,Archive/Imo/Imo2006Q3.lean,Archive/Imo/Imo2008Q2.lean,Archive/Imo/Imo2008Q3.lean,Archive/Imo/Imo2019Q4.lean,Archive/Sensitivity.lean,Archive/Wiedijk100Theorems/CubingACube.lean,Mathlib/Tactic/Linarith/Datatypes.lean,test/cancel_denoms.lean,test/congr.lean,test/interval_cases.lean,test/observe.lean 15 12 ['YaelDillies', 'adomani', 'github-actions', 'grunweg', 'jcommelin', 'urkud'] nobody 1
130-64044
4 months ago
735-33469
735 days ago
1-73101
1 day
32880 0xTerencePrime
author:0xTerencePrime
 feat(Analysis/Asymptotics): define subpolynomial growth ## Main definitions * `Asymptotics.IsSubpolynomial l f g`: A function `f` has subpolynomial growth with respect to `g` along filter `l` if `f = O(1 + ‖g‖^k)` for some natural `k`. ## Main results * `IsSubpolynomial.const`: Constant functions have subpolynomial growth * `IsSubpolynomial.id`: Identity has subpolynomial growth * `IsSubpolynomial.add`: Closure under addition * `IsSubpolynomial.neg`: Closure under negation * `IsSubpolynomial.sub`: Closure under subtraction * `IsSubpolynomial.mul`: Closure under multiplication * `IsSubpolynomial.pow`: Closure under powers * `isSubpolynomial_iff_one_add`: Equivalence with `(1 + ‖g‖)^k` formulation * `IsSubpolynomial.uniform`: Uniform bounds for finite families ## Implementation notes The definition uses `1 + ‖g‖^k` rather than `(1 + ‖g‖)^k` as the primary form, with the equivalence established in `isSubpolynomial_iff_one_add`. Four private auxiliary lemmas handle the key inequalities needed for closure proofs. Closes #32658 awaiting-author t-analysis new-contributor 185/0 Mathlib.lean,Mathlib/Analysis/Asymptotics/Subpolynomial.lean 2 29 ['0xTerencePrime', 'ADedecker', 'github-actions', 'j-loreaux'] ADedecker
assignee:ADedecker
 1
130-10410
4 months ago
130-78268
130 days ago
22-14560
22 days
29610 llllvvuu
author:llllvvuu
 feat(LinearAlgebra): define LinearMap.Eigenbasis Some theorems are left TODO for follow-up work. The definition is from @eric-wieser ([#Is there code for X? > diagonalizable linear maps @ 💬](https://leanprover.zulipchat.com/#narrow/channel/217875-Is-there-code-for-X.3F/topic/diagonalizable.20linear.20maps/near/539163222)). Co-authored-by: Aristotle Harmonic --- - [x] depends on: #29420 (golfs some `[Nontrivial R]` assumptions) - [x] depends on: #29791 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-algebra awaiting-author
label:t-algebra$
 455/5 Mathlib.lean,Mathlib/Analysis/InnerProductSpace/Spectrum.lean,Mathlib/LinearAlgebra/Eigenbasis.lean,Mathlib/LinearAlgebra/FreeModule/PID.lean,Mathlib/Order/CompleteLattice/Basic.lean 5 31 ['github-actions', 'joelriou', 'kckennylau', 'llllvvuu', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] joelriou
assignee:joelriou
 1
128-16053
4 months ago
184-49989
184 days ago
20-33900
20 days
20719 gio256
author:gio256
 feat(AlgebraicTopology): delaborators for truncated simplicial notations We add delaborators for the following notations, introduced in #20688: - `⦋m⦌ₙ`, which denotes the `m`-dimensional simplex in the `n`-truncated simplex category. - `X _⦋m⦌ₙ`, which denotes the `m`-th term of an `n`-truncated simplicial object `X`. - `X ^⦋m⦌ₙ`, which denotes the `m`-th term of an `n`-truncated cosimplicial object `X`. If `pp.proofs` is set to `true`, we also pretty-print the proof `p : m ≤ n` for all three notations as `⦋m, p⦌ₙ`, `X _⦋m, p⦌ₙ`, and `X ^⦋m, p⦌ₙ`, respectively. Credit to @kmill for one piece of code and much metaprogramming inspiration. --- - [x] depends on: #20688 - [x] depends on: #23018 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-algebraic-topology infinity-cosmos t-meta please-adopt will-close-soon 525/33 Mathlib.lean,Mathlib/AlgebraicTopology/SimplexCategory/Basic.lean,Mathlib/AlgebraicTopology/SimplexCategory/Defs.lean,Mathlib/AlgebraicTopology/SimplicialObject/Basic.lean,Mathlib/Tactic.lean,Mathlib/Tactic/SimplexCategory.lean,Mathlib/Util/Superscript.lean,MathlibTest/SimplexCategory.lean,MathlibTest/SimplicialObject.lean,MathlibTest/superscript.lean,scripts/noshake.json 11 24 ['eric-wieser', 'gio256', 'github-actions', 'joneugster', 'kim-em', 'leanprover-community-bot-assistant', 'mathlib4-dependent-issues-bot'] nobody 1
126-26995
4 months ago
306-4135
306 days ago
88-84229
88 days
28796 grunweg
author:grunweg
 feat: immersions are smooth The conventional textbook definition demands that an immersion be smooth. When asking for the immersion to have local slice charts (as we do), this implies smoothness automatically. --- - [x] depends on: #28701 - [x] depends on: #28793 - [x] depends on: #30356 - [x] depends on: #28853 (for simplicity) - [x] depends on: #36816 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-differential-geometry awaiting-author merge-conflict 192/21 Mathlib/Geometry/Manifold/ContMDiff/Atlas.lean,Mathlib/Geometry/Manifold/Immersion.lean,Mathlib/Geometry/Manifold/LocalSourceTargetProperty.lean,Mathlib/Geometry/Manifold/SmoothEmbedding.lean 6 57 ['chrisflav', 'github-actions', 'grunweg', 'mathlib-dependent-issues', 'mathlib-merge-conflicts', 'mathlib4-merge-conflict-bot', 'sgouezel'] PatrickMassot
assignee:PatrickMassot
 1
124-14969
4 months ago
127-15823
127 days ago
0-1863
31 minutes
21476 grunweg
author:grunweg
 feat(lint-style): enable running on downstream projects Enable lint-style to run on downstream projects, by making the following modifications: - allow passing an explicit list of libraries to lint: if nothing is passed, it lints `Mathlib`, `Archive` and `Counterexamples` (as before); otherwise, it lints precisely the passed modules - only check init imports, undocumented scripts and the errors from `lint-style.py` when linting Mathlib - make the style exceptions file configurable and optional: using the `nolints-file` flag, the exceptions file can be configured. If the flag is omitted, we try to find a file at `scripts/nolints-style.txt` --- and otherwise proceed with no style exceptions. This means mathlib can continue unchanged, and downstream projects can either add an explicit exceptions file, or proceed without any exceptions. After this PR, one should be able to run lint-style on a downstream project by `lake exe lint-style ProjectName`. Prompted by [this zulip discussion](https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/lint-style.20for.20downstream.20libraries). --- - [x] depends on: #24570 - [x] depends on: #24953 (I did not test the last part.) [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-linter awaiting-author please-adopt 58/19 Mathlib/Tactic/Linter/TextBased.lean,scripts/lint-style.lean 2 21 ['Vierkantor', 'adomani', 'github-actions', 'grunweg', 'joneugster', 'leanprover-community-bot-assistant', 'mathlib4-dependent-issues-bot'] nobody 1
119-46730
3 months ago
371-21063
371 days ago
43-17409
43 days
34092 staroperator
author:staroperator
 feat(SetTheory/ZFC): properties of `ZFSet.omega` --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-set-theory awaiting-author 77/10 Mathlib/SetTheory/ZFC/Basic.lean,Mathlib/SetTheory/ZFC/Ordinal.lean,Mathlib/SetTheory/ZFC/PSet.lean 3 31 ['Komyyy', 'YaelDillies', 'github-actions', 'mathlib4-merge-conflict-bot', 'staroperator', 'vihdzp'] YaelDillies
assignee:YaelDillies
 1
113-11235
3 months ago
25-49367
25 days ago
99-2887
99 days
34633 mitchell-horner
author:mitchell-horner
 feat(Combinatorics/SimpleGraph): define the Zarankiewicz function Defines the Zarankiewicz function $z(m, n; s, t)$ in terms of bipartite graphs. --- - [x] depends on: #34632 This comes from splitting up #25841 into smaller PRs. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-combinatorics maintainer-merge blocked-by-other-PR 247/0 Mathlib.lean,Mathlib/Combinatorics/SimpleGraph/Extremal/Zarankiewicz.lean,Mathlib/Combinatorics/SimpleGraph/Maps.lean 4 30 ['SnirBroshi', 'YaelDillies', 'b-mehta', 'github-actions', 'mathlib-dependent-issues', 'mathlib-merge-conflicts', 'mitchell-horner'] nobody 1
110-65588
3 months ago
11-79177
11 days ago
57-10700
57 days
34271 gasparattila
author:gasparattila
 feat(Topology/Sets): second-countability of `(Nonempty)Compacts` --- - [x] depends on: #34266 - [x] depends on: #34268 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-topology blocked-by-other-PR 308/93 Mathlib/Topology/MetricSpace/Closeds.lean,Mathlib/Topology/Sets/VietorisTopology.lean 5 9 ['github-actions', 'mathlib-dependent-issues', 'mathlib-merge-conflicts', 'mathlib4-merge-conflict-bot', 'scholzhannah'] urkud
assignee:urkud
 1
110-726
3 months ago
14-5553
14 days ago
51-14168
51 days
33493 michelsol
author:michelsol
 feat(RingTheory/Polynomial): An explicit formula for the Chebyshev polynomials of the first kind Adds the following explicit formula on the Chebyshev polynomial of the first kind of order n. ${ T_{n}(x)\ =\ \sum \limits _{k=0}^{\lfloor {\frac {n}{2}}\rfloor } {\binom {n}{2k}} \left(\ X^{2}-1\ \right)^{k}\ X^{n-2k}}$ This explicit formula can be found [here](https://en.wikipedia.org/wiki/Chebyshev_polynomials#Explicit_expressions). There is a proof using complex numbers but it only works if the ring R = ℂ. The proof here is by induction and works in a commutative ring R. Mathlib seems to extend the definition of Chebyshev polynomials for $n \in \mathbb{Z}$ but this would make the formula more cumbersome with `n.natAbs` in place of `n`'s, so I expressed it on `n : ℕ` directly. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-ring-theory new-contributor awaiting-author 51/1 Mathlib/RingTheory/Polynomial/Chebyshev.lean 1 8 ['YuvalFilmus', 'erdOne', 'github-actions', 'metakunt', 'michelsol'] chrisflav
assignee:chrisflav
 1
103-74444
3 months ago
103-74444
103 days ago
35-16105
35 days
31141 peabrainiac
author:peabrainiac
 feat(Analysis/Calculus): parametric integrals over smooth functions are smooth Show that for any smooth function `f : H × ℝ → E`, the parametric integral `fun x ↦ ∫ t in a..b, f (x, t) ∂μ` is smooth too. The argument proceeds inductively, using the fact that derivatives of parametric integrals can themselves be computed as parametric integrals. The necessary lemmas on derivatives of parametric integrals already existed, but took some work to apply due to their generality; we state some convenient special cases. --- - [x] depends on: #31077 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-analysis awaiting-author maintainer-merge 470/12 Mathlib/Analysis/Calculus/ParametricIntegral.lean,Mathlib/Analysis/Calculus/ParametricIntervalIntegral.lean,Mathlib/MeasureTheory/Integral/DominatedConvergence.lean,Mathlib/Topology/NhdsWithin.lean,Mathlib/Topology/Separation/Regular.lean 5 36 ['fpvandoorn', 'github-actions', 'j-loreaux', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot', 'peabrainiac', 'sgouezel'] j-loreaux
assignee:j-loreaux
 1
100-38349
3 months ago
100-38349
100 days ago
33-85043
33 days
11500 mcdoll
author:mcdoll
 refactor(Topology/Algebra/Module/WeakDual): Clean up - Move `Dual` and `dualPairing` lower in the import-hierachy - deduplicate `dualPairing` - Bundle continuity statements to `CLM`s. - Make `WeakDual` and `WeakSpace` reducible - Remove `refine'` in favor of `refine` --- Cleaning up `Analysis/NormedSpace/WeakDual` will be done in a second PR [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict awaiting-author t-topology 227/179 Mathlib.lean,Mathlib/Analysis/Fourier/RiemannLebesgueLemma.lean,Mathlib/Analysis/InnerProductSpace/Adjoint.lean,Mathlib/Analysis/InnerProductSpace/Dual.lean,Mathlib/Analysis/LocallyConvex/Polar.lean,Mathlib/Analysis/NormedSpace/Dual.lean,Mathlib/Analysis/NormedSpace/WeakDual.lean,Mathlib/Analysis/VonNeumannAlgebra/Basic.lean,Mathlib/MeasureTheory/Function/AEEqOfIntegral.lean,Mathlib/MeasureTheory/Measure/FiniteMeasure.lean,Mathlib/Topology/Algebra/Module/CharacterSpace.lean,Mathlib/Topology/Algebra/Module/Dual.lean,Mathlib/Topology/Algebra/Module/WeakDual.lean,docs/overview.yaml,docs/undergrad.yaml 15 16 ['ADedecker', 'grunweg', 'j-loreaux', 'kkytola', 'mathlib-bors', 'mcdoll', 'urkud'] nobody 2
96-27997
3 months ago
745-27197
745 days ago
46-5571
46 days
35134 fpvandoorn
author:fpvandoorn
 feat(translate): print constant names with hover info Part of #34846. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-meta awaiting-author merge-conflict 46/28 Mathlib/Tactic/Translate/Core.lean,MathlibTest/toAdditive.lean 2 6 ['JovanGerb', 'github-actions', 'mathlib-merge-conflicts'] JovanGerb
assignee:JovanGerb
 1
96-19917
3 months ago
98-12373
98 days ago
2-13760
2 days
24965 erdOne
author:erdOne
 refactor: Make `IsLocalHom` take unbundled map Under the current definition, `IsLocalHom f` and `IsLocalHom f.toMonoidHom` are not defeq, which causes quite some annoyances. We also have a consensus to not use `*HomClass` in definitions. As a result, we change `IsLocalHom` to take an unbundled function instead of a funlike. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra delegated merge-conflict
label:t-algebra$
 18/9 Mathlib/Algebra/Group/Units/Hom.lean,Mathlib/AlgebraicGeometry/Scheme.lean,Mathlib/Geometry/RingedSpace/LocallyRingedSpace.lean,Mathlib/Geometry/RingedSpace/OpenImmersion.lean,Mathlib/RingTheory/LocalRing/ResidueField/Basic.lean 5 15 ['adomani', 'alreadydone', 'erdOne', 'eric-wieser', 'github-actions', 'jcommelin', 'leanprover-community-bot-assistant', 'mathlib-bors', 'mathlib-merge-conflicts', 'mathlib4-merge-conflict-bot', 'vihdzp'] mattrobball
assignee:mattrobball
 1
93-80828
3 months ago
185-46597
185 days ago
24-84527
24 days
31892 jsm28
author:jsm28
 feat(Geometry/Euclidean/Sphere/PolePolar): poles and polars Define poles and polars for spheres in Euclidean affine spaces, and set up some basic API, including in particular La Hire's theorem (`p₁` lies on the polar of `p₂` if and only if `p₂` lies on the polar of `p₁`). Poles and polars are actually meaningful for any quadric in a projective space over any field, but I think it's reasonable to set up this theory for spheres in the Euclidean context and potentially link it in future to more general projective geometry. --- - [ ] depends on: #31891 - [ ] depends on: #32296 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-euclidean-geometry blocked-by-other-PR 424/7 Mathlib.lean,Mathlib/Geometry/Euclidean/Sphere/PolePolar.lean 4 4 ['Parcly-Taxel', 'github-actions', 'mathlib-dependent-issues', 'mathlib-merge-conflicts'] nobody 1
93-31989
3 months ago
56-13329
56 days ago
56-13801
56 days
35524 grunweg
author:grunweg
 feat: text-based linter against \t followed by tactic mode Wait for the zulip discussion to converge. **If** there is consensus in favour of this change, summarise the motivation here. [zulip discuss](https://leanprover.zulipchat.com/#narrow/channel/345428-mathlib-reviewers/topic/proposal.3A.20no.20more.20use.20of.20.60.E2.96.B8.60.20in.20Mathlib.3F/with/574680826) --- There are currently 80 remaining exceptions in mathlib: ideally, these would get fixed before merging this. Works best when combined with #35523. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-linter awaiting-zulip merge-conflict 23/2 Mathlib/Tactic/Linter/TextBased.lean 1 5 ['github-actions', 'grunweg', 'joneugster', 'mathlib-merge-conflicts', 'vihdzp'] nobody 1
91-21386
3 months ago
92-44158
92 days ago
0-3308
55 minutes
31766 SuccessMoses
author:SuccessMoses
 feat(Topology/EMetricSpace): continuity of arc length fixes half of #31751 --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor t-topology awaiting-author merge-conflict 396/0 Mathlib.lean,Mathlib/Topology/EMetricSpace/ArcLength.lean,Mathlib/Topology/EMetricSpace/BoundedVariation.lean 3 40 ['SnirBroshi', 'SuccessMoses', 'alreadydone', 'github-actions', 'grunweg', 'j-loreaux', 'mathlib-merge-conflicts'] nobody 1
88-398
2 months ago
164-1268
164 days ago
2-77113
2 days
35494 Timeroot
author:Timeroot
 feat(Topology/Perfect): simp frontier_singleton Add simp lemma ``` theorem frontier_singleton {X : Type*} [TopologicalSpace X] [T1Space X] [PerfectSpace X] (p : X) : frontier {p} = {p} ``` --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-topology awaiting-author 4/0 Mathlib/Topology/Perfect.lean 1 4 ['Timeroot', 'github-actions', 'urkud', 'vihdzp'] urkud
assignee:urkud
 1
87-23575
2 months ago
87-69111
87 days ago
5-41003
5 days
30872 rudynicolop
author:rudynicolop
 feat(Computability/NFA): NFA closure under concatenation This PR proves that regular languages are closed under concatenation via a direct construction on `NFA`s without `εNFA` nor ε-transitions. The main new definitions and results include: - `M1.concat M2`, the concatenation of `NFA`s `M1` and `M2`, a direct construction without ε-transitions. - Theorem `accepts_concat : (M1.concat M2).accepts = M1.accepts * M2.accepts`, showing the correctness of the construction. - Theorem `IsRegular.mul`, showing that regular languages are closed under concatenation. --- - [x] depends on: #31038 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-computability new-contributor awaiting-author 104/7 Mathlib/Computability/NFA.lean 1 67 ['YaelDillies', 'ctchou', 'eric-wieser', 'github-actions', 'lambda-fairy', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot', 'rudynicolop'] nobody 2
85-24994
2 months ago
113-8403
113 days ago
59-63565
59 days
34932 erdOne
author:erdOne
 feat(AlgebraicGeometry): formally etale morphisms --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebraic-geometry merge-conflict delegated 163/12 Mathlib.lean,Mathlib/AlgebraicGeometry/Morphisms/Etale.lean,Mathlib/AlgebraicGeometry/Morphisms/FormallyEtale.lean,Mathlib/AlgebraicGeometry/Morphisms/RingHomProperties.lean,Mathlib/RingTheory/RingHom/Etale.lean 5 17 ['chrisflav', 'erdOne', 'github-actions', 'joneugster', 'mathlib-bors', 'mathlib-merge-conflicts', 'ocfnash'] nobody 1
84-74264
2 months ago
86-82753
86 days ago
11-40391
11 days
35423 Rob23oba
author:Rob23oba
 feat: add congruence lemmas for `Function.update` and `Pi.single` Adds `simp` congruence lemmas to `Function.update` and `Pi.single` that are specialized for the non-dependent case. See also [#mathlib4 > Simp fails to apply with `Function.update`](https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/Simp.20fails.20to.20apply.20with.20.60Function.2Eupdate.60/with/573889929). --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra awaiting-author merge-conflict
label:t-algebra$
 29/6 Mathlib/Algebra/Notation/Pi/Basic.lean,Mathlib/Logic/Function/Basic.lean,Mathlib/NumberTheory/ModularForms/QExpansion.lean,Mathlib/RepresentationTheory/Tannaka.lean,Mathlib/Topology/Algebra/InfiniteSum/Basic.lean 5 11 ['Rob23oba', 'eric-wieser', 'github-actions', 'joelriou', 'joneugster', 'loefflerd', 'mathlib-merge-conflicts'] joelriou
assignee:joelriou
 1
83-81541
2 months ago
58-56220
58 days ago
36-20932
36 days
34875 banrovegrie
author:banrovegrie
 feat(LinearAlgebra/Matrix): add Sherman-Morrison formula Mathlib has the matrix determinant lemma (`det_add_replicateCol_mul_replicateRow` in SchurComplement.lean) but lacked the corresponding inverse formula. This PR fills that gap. - Add `Matrix.inv_add_vecMulVec`: Sherman-Morrison formula for `(A + uv^T)^{-1}` - Add `Matrix.inv_sub_vecMulVec`: subtraction variant - Add `Matrix.isUnit_det_add_vecMulVec`: invertibility under the formula's hypotheses ## Test plan - [x] `lake build` passes - [x] Lines within 100 char limit - [x] All declarations have docstrings **Any specific AI usage?**: Used Copilot for review purposes. t-algebra new-contributor awaiting-author
label:t-algebra$
 135/0 Mathlib.lean,Mathlib/LinearAlgebra/Matrix/ShermanMorrison.lean 2 14 ['Xxxjdjdid', 'banrovegrie', 'chrisflav', 'copilot-pull-request-reviewer', 'eric-wieser', 'github-actions', 'wwylele'] chrisflav
assignee:chrisflav
 1
82-20269
2 months ago
37-17358
37 days ago
69-6728
69 days
28685 mitchell-horner
author:mitchell-horner
 feat(Combinatorics/SimpleGraph): prove the minimal-degree version of the Erdős-Stone theorem Proves the minimal degree-version of the Erdős-Stone theorem: If `G` has a minimal degree of at least `(1 - 1 / r + o(1)) * card V`, then `G` contains a copy of a `completeEquipartiteGraph` in `r + 1` parts each of size `t`. The double-counting construction from the proof is available in `namespace ErdosStone`. --- - [x] depends on: #25843 - [x] depends on: #27597 - [x] depends on: #27599 - [x] depends on: #28443 - [x] depends on: #28445 - [x] depends on: #28446 - [x] depends on: #28447 This is the first of several pull requests towards the full Erdős-Stone(-Simonovits) theorem, hence the name of the file. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-combinatorics maintainer-merge 323/0 Mathlib.lean,Mathlib/Combinatorics/SimpleGraph/Extremal/ErdosStoneSimonovits.lean 2 19 ['YaelDillies', 'b-mehta', 'github-actions', 'mathlib-dependent-issues', 'mathlib4-merge-conflict-bot', 'mitchell-horner', 'robin-carlier'] b-mehta
assignee:b-mehta
 1
81-55263
2 months ago
18-75925
18 days ago
78-84379
78 days
34015 erdOne
author:erdOne
 feat(AlgebraicGeometry): category of schemes affine over a base --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebraic-geometry delegated awaiting-author 466/11 Mathlib.lean,Mathlib/AlgebraicGeometry/AffineOver.lean,Mathlib/AlgebraicGeometry/Limits.lean,Mathlib/AlgebraicGeometry/Morphisms/Affine.lean,Mathlib/AlgebraicGeometry/OpenImmersion.lean,Mathlib/AlgebraicGeometry/RelativeGluing.lean,Mathlib/AlgebraicGeometry/Sites/SmallAffineZariski.lean,Mathlib/CategoryTheory/Sites/Hypercover/Subcanonical.lean 7 52 ['chrisflav', 'dagurtomas', 'erdOne', 'github-actions', 'mathlib-bors', 'mathlib-merge-conflicts', 'mathlib4-merge-conflict-bot', 'riccardobrasca'] chrisflav
assignee:chrisflav
 1
80-22338
2 months ago
12-47881
12 days ago
40-35668
40 days
30431 kckennylau
author:kckennylau
 feat(RingTheory): a homogeneous submodule is the span of its homogeneous elements --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-ring-theory merge-conflict 22/0 Mathlib/RingTheory/GradedAlgebra/Homogeneous/Ideal.lean,Mathlib/RingTheory/GradedAlgebra/Homogeneous/Submodule.lean 2 9 ['alreadydone', 'github-actions', 'kckennylau', 'mariainesdff', 'mathlib-merge-conflicts'] mariainesdff
assignee:mariainesdff
 1
78-8717
2 months ago
200-27479
200 days ago
23-21820
23 days
32989 kim-em
author:kim-em
 fix(Tactic/Simps): skip @[defeq] inference for non-exposed definitions This PR makes `@[simps]` check whether the source definition's body is exposed before calling `inferDefEqAttr`. When the body is not exposed, we skip the `@[defeq]` inference to avoid validation errors. Without this fix, using `@[simps]` on a definition that is not `@[expose]`d produces an error like: ``` Theorem Foo_bar has a `rfl`-proof and was thus inferred to be `@[defeq]`, but validating that attribute failed: Not a definitional equality: the left-hand side ... is not definitionally equal to the right-hand side ... Note: This theorem is exported from the current module. This requires that all definitions that need to be unfolded to prove this theorem must be exposed. ``` The fix checks `(← getEnv).setExporting true |>.find? cfg.srcDeclName |>.any (·.hasValue)` to determine if the definition body is visible in the public scope, and only calls `inferDefEqAttr` if it is. 🤖 Prepared with Claude Code t-meta awaiting-author LLM-generated please-adopt merge-conflict 51/3 Mathlib/CategoryTheory/Triangulated/TStructure/TruncLTGE.lean,Mathlib/Tactic/Simps/Basic.lean,MathlibTest/SimpsModule.lean 4 17 ['JovanGerb', 'Vierkantor', 'github-actions', 'joneugster', 'kim-em', 'mathlib-merge-conflicts'] nobody 1
77-43526
2 months ago
99-56594
99 days ago
37-18737
37 days
17627 hrmacbeth
author:hrmacbeth
 feat: universal properties of vector bundle constructions Characterizations for the smoothness of maps into the total spaces of (1) the direct sum of two vector bundles; (2) the pullback of a vector bundle. This gap in the library was exposed by #17358. --- - [x] depends on: #22804 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-differential-geometry 311/9 Mathlib/Data/Bundle.lean,Mathlib/Geometry/Manifold/VectorBundle/Basic.lean,Mathlib/Geometry/Manifold/VectorBundle/Pullback.lean,Mathlib/Topology/FiberBundle/Constructions.lean 4 26 ['PatrickMassot', 'fpvandoorn', 'github-actions', 'grunweg', 'hrmacbeth', 'j-loreaux', 'leanprover-community-bot-assistant', 'mathlib-bors', 'mathlib4-dependent-issues-bot', 'sgouezel'] grunweg
assignee:grunweg
 1
77-35109
2 months ago
337-34848
337 days ago
91-68302
91 days
19275 eric-wieser
author:eric-wieser
 fix: if nolint files change, do a full rebuild Otherwise CI will succeed when removing entries from the file, but fail later when someone changes something unrelated. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict 8/0 lakefile.lean 1 22 ['YaelDillies', 'adomani', 'eric-wieser', 'fpvandoorn', 'github-actions', 'grunweg', 'mathlib-bors'] nobody 1
77-35092
2 months ago
548-75727
548 days ago
0-214
3 minutes
33592 nielstron
author:nielstron
 feat(Computability/ContextFreeGrammar): mapping between two types of nonterminal symbols This PR picks up https://github.com/leanprover-community/mathlib4/pull/15895 and resolves the failing lemma by redefining Good symbols. --- I checked that https://github.com/leanprover-community/mathlib4/pull/13514 builds correctly when based on this build. PR for that is #33599 This is my first contribution please let me know of any changes I should outline. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) awaiting-author t-computability new-contributor 160/0 Mathlib/Computability/ContextFreeGrammar.lean 1 34 ['YaelDillies', 'github-actions', 'madvorak', 'nielstron'] nobody 1
77-24108
2 months ago
126-52635
126 days ago
10-68503
10 days
35215 kim-em
author:kim-em
 chore: use @[to_dual] in FixedPoints This PR adds `@[to_dual]` annotations to 14 theorems about `lfp` in `Order/FixedPoints.lean`, auto-generating their `gfp` duals and deleting the hand-written versions. Also registers `OrderHom.lfp` as the dual of `OrderHom.gfp` via `attribute [to_dual existing]`. Auto-generated duals include: `le_gfp`, `gfp_le_fixed`, `gfp_le`, `gfp_le_map`, `map_gfp`, `isFixedPt_gfp`, `map_le_gfp`, `isGreatest_gfp_le`, `isGreatest_gfp`, `gfp_induction`, `map_gfp_comp`, `gfp_gfp`, `map_inf_fixedPoints_le`, `map_sInf_subset_fixedPoints_le`. [Diff relative to #35208](https://github.com/kim-em/mathlib4/compare/kim/to-dual-bounds-basic...kim/to-dual-fixed-points) - [x] depends on: #35208 🤖 Prepared with Claude Code LLM-generated merge-conflict 249/548 Mathlib/Algebra/Module/Torsion/Basic.lean,Mathlib/Order/CompleteLattice/Basic.lean,Mathlib/Order/CompleteLattice/Defs.lean,Mathlib/Order/ConditionallyCompleteLattice/Defs.lean,Mathlib/Order/FixedPoints.lean,Mathlib/Order/GaloisConnection/Basic.lean,Mathlib/Order/Interval/Set/Disjoint.lean,Mathlib/Topology/Order.lean 8 11 ['JovanGerb', 'github-actions', 'kim-em', 'mathlib-dependent-issues', 'mathlib-merge-conflicts', 'vihdzp'] alexjbest
assignee:alexjbest
 1
75-75784
2 months ago
63-18785
63 days ago
24-14816
24 days
36165 Parcly-Taxel
author:Parcly-Taxel
 chore: deprecate `Nat.strongRec(On)'` In favour of Batteries's `Nat.strongRec` for definitions and `Nat.strong_induction_on` for proofs. t-data merge-conflict 34/66 Mathlib/Analysis/Analytic/Inverse.lean,Mathlib/Data/Int/GCD.lean,Mathlib/Data/Nat/Factorization/Induction.lean,Mathlib/Data/Nat/Init.lean,Mathlib/Data/Set/Finite/Basic.lean,Mathlib/Data/ZMod/Basic.lean,Mathlib/GroupTheory/SpecificGroups/Cyclic.lean,Mathlib/Topology/EMetricSpace/Paracompact.lean 8 6 ['JovanGerb', 'MichaelStollBayreuth', 'Parcly-Taxel', 'Vierkantor', 'github-actions', 'mathlib-bors', 'mathlib-merge-conflicts'] Vierkantor
assignee:Vierkantor
 1
75-33715
2 months ago
63-18775
63 days ago
15-53464
15 days
31135 kckennylau
author:kckennylau
 feat(RingTheory): is localization iff is localization on saturation In this PR we show that `A` is a localization of `R` on the submonoid `S` iff it is so on the saturation of `S`. Crucially, the saturation of `S` is precisely the elements that become a unit in `A`. --- - [x] depends on: #31132 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-ring-theory delegated 53/0 Mathlib.lean,Mathlib/RingTheory/Localization/Saturation.lean 2 15 ['alreadydone', 'chrisflav', 'github-actions', 'kckennylau', 'mathlib-bors', 'mathlib-dependent-issues', 'mathlib4-merge-conflict-bot', 'riccardobrasca'] chrisflav
assignee:chrisflav
 1
72-75789
2 months ago
45-42924
45 days ago
32-67213
32 days
35295 Rida-Hamadani
author:Rida-Hamadani
 feat(SimpleGraph): `dropLast` of a cycle is a path --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-combinatorics awaiting-author 13/0 Mathlib/Combinatorics/SimpleGraph/Paths.lean,Mathlib/Combinatorics/SimpleGraph/Walk/Operations.lean 2 14 ['Rida-Hamadani', 'SnirBroshi', 'YaelDillies', 'github-actions', 'mathlib-merge-conflicts', 'vlad902'] YaelDillies
assignee:YaelDillies
 1
70-25950
2 months ago
43-51431
43 days ago
34-53762
34 days
27534 PierreQuinton
author:PierreQuinton
 feat: a typeclass for `sSup`/`sInf` to be lawful Adds lawful infima and suprema type classes. A preorder with lawful suprema: whenever a set has a least upper bound, `sSup` returns a least upper bound for that set. A preorder with lawful infima: whenever a set has a greatest lower bound, `sInf` returns a greastest lower bound for that set. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-order 121/8 Mathlib.lean,Mathlib/Order/CompleteLattice/Defs.lean,Mathlib/Order/LawfulSupInf.lean 3 26 ['PierreQuinton', 'YaelDillies', 'github-actions', 'mathlib4-merge-conflict-bot', 'plp127', 'vihdzp'] nobody 1
69-19812
2 months ago
184-50887
184 days ago
114-37921
114 days
36706 kim-em
author:kim-em
 feat(Tactic/FastInstance): warn when a synthesized sub-instance has leaky binder types This PR adds a warning to `fast_instance%` and `inferInstanceAs%` when they encounter a synthesized sub-instance that has leaky data-field binder types. When `fast_instance%` recursively normalizes a class instance, it uses `trySynthInstance` to find canonical sub-instances. If a found sub-instance is not canonical at instances transparency (i.e., its internal lambda binder types reference an unexpanded type alias instead of the target carrier), the tool now emits a warning: ``` fast_instance%: 'leakySub' (for SubClass MyNat) has leaky data-field binder types, which may cause `isDefEq` failures at instances transparency (e.g. in `grind`). Consider redefining it with `fast_instance%` or `inferInstanceAs%`. To suppress: `set_option Elab.fast_instance.warnLeakySubInstances false` ``` The leakiness check uses `withDisabledInstance` to temporarily evict the sub-instance from the discrimination tree (preventing trivial self-match via `trySynthInstance`), then compares against the canonical form at instances transparency. A `warnLeaky` parameter propagates through recursive calls to prevent nested warnings. The warning is suppressed via `set_option Elab.fast_instance.warnLeakySubInstances false`. - [ ] depends on: #36701 🤖 Prepared with Claude Code t-meta blocked-by-other-PR large-import LLM-generated merge-conflict 415/21 Mathlib/Algebra/Module/Congruence/Defs.lean,Mathlib/GroupTheory/Congruence/Defs.lean,Mathlib/Init.lean,Mathlib/RingTheory/Congruence/Defs.lean,Mathlib/RingTheory/Ideal/Quotient/Basic.lean,Mathlib/RingTheory/Ideal/Quotient/Defs.lean,Mathlib/Tactic/DefEqAbuse.lean,Mathlib/Tactic/FastInstance.lean,MathlibTest/CheckInstance.lean,MathlibTest/DefEqAbuse.lean,MathlibTest/InferInstanceAsPercent.lean 11 7 ['Vierkantor', 'eric-wieser', 'github-actions', 'mathlib-dependent-issues', 'mathlib-merge-conflicts'] Vierkantor
assignee:Vierkantor
 1
56-4420
1 month ago
67-68525
67 days ago
0-1003
16 minutes
37111 tannerduve
author:tannerduve
 feat(Computability): add Nat.PrimrecIn and PrimrecIn - Add `Nat.PrimrecIn`: primitive recursive functions relative to a set of oracles - Add `PrimrecIn`: lifts `Nat.PrimrecIn` to `Primcodable` types A `PrimrecIn` version of `RecursiveIn.iff_nat` (i.e., `PrimrecIn O (f : ℕ → ℕ) ↔ Nat.PrimrecIn O f`) is left as future work as it requires proving `Nat.PrimrecIn O Nat.pred`, which needs additional API for `Nat.PrimrecIn`. --- Split out from #34937 as requested in review. - [x] depends on: #37061 t-computability new-contributor awaiting-author 24/0 Mathlib/Computability/RecursiveIn.lean 1 14 ['Komyyy', 'bryangingechen', 'github-actions', 'mathlib-dependent-issues', 'mathlib-merge-conflicts', 'tannerduve'] nobody 1
42-5016
1 month ago
43-17875
43 days ago
1-79421
1 day
37247 yuma-mizuno
author:yuma-mizuno
 feat(GroupTheory/MonoidLocalization): add prime transport lemmas --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-ring-theory awaiting-author 75/7 Mathlib/GroupTheory/MonoidLocalization/MonoidWithZero.lean,Mathlib/RingTheory/Localization/Basic.lean,Mathlib/RingTheory/Localization/Defs.lean 3 6 ['github-actions', 'riccardobrasca'] riccardobrasca
assignee:riccardobrasca
 1
36-45069
1 month ago
36-45069
36 days ago
20-41780
20 days
37420 artie2000
author:artie2000
 refactor: change definitions to avoid `ConvexCone` Change the definitions of `PointedCone.positive` and `PointedCone.closure` to avoid mentioning `ConvexCone`. This PR is part of a series deprecating `ConvexCone`: https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/Replacing.20.60ConvexCone.60.20with.20.60PointedCone.60/with/582738985 --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-convex-geometry maintainer-merge 10/4 Mathlib/Analysis/Convex/Cone/Closure.lean,Mathlib/Geometry/Convex/Cone/Pointed.lean 2 3 ['YaelDillies', 'github-actions', 'mathlib-merge-conflicts', 'ooovi', 'vihdzp'] nobody 3
36-36833
1 month ago
36-36797
36 days ago
51-57072
51 days
36774 euprunin
author:euprunin
 chore: replace long terminal `rw […]`:s (≥4 lemmas) with bare `simp`:s The goal of this PR is to decrease the number of times lemmas are called explicitly. Any decrease in compilation time is a welcome side effect, although it is not a primary objective. Trace profiling results (differences <30 ms considered measurement noise): * `Finset.lcm_union`: unchanged 🎉 * `Finset.gcd_union`: unchanged 🎉 * `Polynomial.derivative_eval₂_C`: unchanged 🎉 * `Polynomial.expand_pow`: unchanged 🎉 * `Cardinal.mk_real`: unchanged 🎉 * `Real.log_zpow`: unchanged 🎉 * `Matroid.eRank_le_encard_add_eRk_compl`: unchanged 🎉 * `DFinsupp.single_tsub`: unchanged 🎉 * `EReal.inv_neg`: unchanged 🎉 * `Finsupp.toMultiset_map`: unchanged 🎉 * `Finsupp.single_tsub`: unchanged 🎉 * `Multiset.countP_map`: unchanged 🎉 * `Nat.ascFactorial_eq_factorial_mul_choose'`: unchanged 🎉 * `Real.sign_intCast`: unchanged 🎉 * `Real.volume_eball`: unchanged 🎉 * `Real.volume_closedEBall`: unchanged 🎉 * `LFunction_ne_zero_of_not_quadratic_or_ne_one`: 295 ms before, 152 ms after 🎉 * `hasSum_one_div_nat_pow_mul_cos`: unchanged 🎉 * `inv_eq_of_aeval_divX_ne_zero`: unchanged 🎉 * `AlgebraicIndependent.aeval_comp_mvPolynomialOptionEquivPolynomialAdjoin`: unchanged 🎉 * `Ordinal.deriv_mul_eq_opow_omega0_mul`: unchanged 🎉 Profiled using `set_option trace.profiler true in`. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) 22/24 Mathlib/Algebra/GCDMonoid/Finset.lean,Mathlib/Algebra/Polynomial/Derivative.lean,Mathlib/Algebra/Polynomial/Expand.lean,Mathlib/Analysis/Real/Cardinality.lean,Mathlib/Analysis/SpecialFunctions/Log/Basic.lean,Mathlib/Combinatorics/Matroid/Rank/ENat.lean,Mathlib/Data/DFinsupp/Order.lean,Mathlib/Data/EReal/Inv.lean,Mathlib/Data/Finsupp/Multiset.lean,Mathlib/Data/Finsupp/Order.lean,Mathlib/Data/Multiset/Filter.lean,Mathlib/Data/Nat/Choose/Basic.lean,Mathlib/Data/Real/Sign.lean,Mathlib/MeasureTheory/Measure/Lebesgue/Basic.lean,Mathlib/NumberTheory/LSeries/Nonvanishing.lean,Mathlib/NumberTheory/ZetaValues.lean,Mathlib/RingTheory/Algebraic/Basic.lean,Mathlib/RingTheory/AlgebraicIndependent/Basic.lean,Mathlib/SetTheory/Ordinal/FixedPoint.lean 19 2 ['artie2000', 'euprunin', 'github-actions'] nobody 1
36-9104
1 month ago
66-17630
66 days ago
66-17342
66 days
32282 jsm28
author:jsm28
 feat(Geometry/Euclidean/Angle/Incenter): unoriented angle bisection Add lemmas giving unoriented angles involving the incenter and excenters of a triangle as expressions involving dividing angles of the triangle by 2, deduced from oriented bisection lemmas. --- - [ ] depends on: #30981 - [ ] depends on: #30982 - [ ] depends on: #31205 - [ ] depends on: #32019 - [ ] depends on: #32021 - [ ] depends on: #32259 - [ ] depends on: #32260 - [ ] depends on: #32270 - [ ] depends on: #32273 - [ ] depends on: #32278 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-euclidean-geometry 98/0 Mathlib/Geometry/Euclidean/Angle/Incenter.lean 1 8 ['github-actions', 'jsm28', 'mathlib-dependent-issues', 'mathlib4-merge-conflict-bot', 'wwylele'] nobody 1
32-75788
1 month ago
56-13340
56 days ago
56-13788
56 days
37939 AntoineChambert-Loir
author:AntoineChambert-Loir
 feat(Order/Completion): embed a linear order into a dense and complete linear order The aim of the PR is to prove the following theorem that will be used as an input to [Sion.DMCompletion.exists_isSaddlePointOn](https://leanprover-community.github.io/mathlib4_docs/Mathlib/Topology/Sion.html#Sion.DMCompletion.exists_isSaddlePointOn) : *If `β` is any linear order, then there exists a complete and dense linear order `γ` together with a continuous embedding `ι : β ↪o γ` (for the order topologies on `β` and `γ`).* Meanwhile, the PR also records various instances about dense orders and lemmas regarding the Dedekind MacNeille completion and lexicographic orders. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-order 206/3 Mathlib.lean,Mathlib/Data/Prod/Lex.lean,Mathlib/Order/Completion.lean,Mathlib/Topology/Order/Completion.lean,Mathlib/Topology/Sion.lean 5 52 ['ADedecker', 'AntoineChambert-Loir', 'github-actions', 'mathlib-merge-conflicts', 'vihdzp'] vihdzp
assignee:vihdzp
 1
30-1509
1 month ago
30-22240
30 days ago
33-21651
33 days
37346 euprunin
author:euprunin
 chore: golf using `grind` The goal of this PR is to decrease the number of times lemmas are called explicitly. Any decrease in compilation time is a welcome side effect, although it is not a primary objective. Trace profiling results (differences <30 ms considered measurement noise): * `✅️ SimpleGraph.Walk.IsPath.getVert_injOn`: unchanged 🎉 * `✅️ SimpleGraph.Walk.length_bypass_le`: unchanged 🎉 * `✅️ Rat.floor_intCast_div_natCast`: unchanged 🎉 * `✅️ InnerProductGeometry.norm_eq_of_angle_sub_eq_angle_sub_rev_of_angle_ne_pi`: unchanged 🎉 * `✅️ padicNorm.zero_of_padicNorm_eq_zero`: unchanged 🎉 Profiled using `set_option trace.profiler true in`. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) maintainer-merge awaiting-zulip 7/45 Mathlib/Combinatorics/SimpleGraph/Paths.lean,Mathlib/Data/Rat/Floor.lean,Mathlib/Geometry/Euclidean/Triangle.lean,Mathlib/NumberTheory/Padics/PadicNorm.lean 4 22 ['FernandoChu', 'bryangingechen', 'chenson2018', 'euprunin', 'faenuccio', 'github-actions', 'grunweg'] nobody 1
23-36081
23 days ago
23-36112
23 days ago
30-49603
30 days
36740 euprunin
author:euprunin
 chore: golf using `grind` The goal of this PR is to decrease the number of times lemmas are called explicitly. Any decrease in compilation time is a welcome side effect, although it is not a primary objective. Trace profiling results (differences <30 ms considered measurement noise): * `AlgebraicGeometry.Scheme.isBasis_affineOpens`: unchanged 🎉 * `SimpleGraph.Walk.takeUntil_eq_take`: 263 ms before, 180 ms after 🎉 * `SimpleGraph.Walk.dropUntil_eq_drop`: 382 ms before, 261 ms after 🎉 * `Int.image_Ico_emod`: unchanged 🎉 * `Equiv.Perm.ofSubtype_swap_eq`: unchanged 🎉 Profiled using `set_option trace.profiler true in`. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict 7/33 Mathlib/AlgebraicGeometry/AffineScheme.lean,Mathlib/Combinatorics/SimpleGraph/Walk/Decomp.lean,Mathlib/Data/Int/Interval.lean,Mathlib/GroupTheory/Perm/Support.lean 4 8 ['artie2000', 'chenson2018', 'github-actions', 'mathlib-merge-conflicts'] nobody 1
23-1027
23 days ago
23-1028
23 days ago
43-5868
43 days
37603 Parcly-Taxel
author:Parcly-Taxel
 refactor: review of `SetSemiring` * Rename `Set.up` and `SetSemiring.down` to `SetSemiring.ofSet` and `SetSemiring.toSet` respectively. Unprotect both and make them equivalences, following `FreeMonoid`. * Derive `CompleteAtomicBooleanAlgebra` for `SetSemiring` immediately. * Add `imageHom_id` and `imageHom_comp`. The three existing lemmas about `imageHom` are coalesced into `imageHom_apply`. Ultimately inspired by https://github.com/leanprover-community/mathlib4/pull/36934#issuecomment-4183475568. maintainer-merge merge-conflict 120/165 Mathlib/Algebra/Algebra/Operations.lean,Mathlib/Data/Set/Semiring.lean 2 42 ['Parcly-Taxel', 'YaelDillies', 'eric-wieser', 'github-actions', 'mathlib-merge-conflicts', 'sgouezel'] nobody 1
22-78817
22 days ago
22-78818
22 days ago
22-62470
22 days
37342 vasnesterov
author:vasnesterov
 feat(Tactic/ComputeAsymptotics/Multiseries): non-primitive corecursion for Seq: more `FriendlyOperation` API This is a continuation of #35072. This PR adds more API about friendly operations: * `FriendlyOperation.coind`: a coinductive principle for proving that operation is friendly * `FriendlyOperationClass.eq_of_bisim`: a generalisation of `Seq.eq_of_bisim'` for proving two sequences are equal. --- - [x] depends on: #35072 This is a part of the `compute_asymptotics` tactic (#28291). [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-data t-meta awaiting-author 161/0 Mathlib/Tactic/ComputeAsymptotics/Multiseries/Corecursion.lean 1 5 ['github-actions', 'joneugster', 'mathlib-dependent-issues'] joneugster
assignee:joneugster
 1
21-44545
21 days ago
21-44545
21 days ago
28-74243
28 days
37562 IvanRenison
author:IvanRenison
 feat(Combinatorics/SimpleGraph): add several lemmas about when `Walk.bypass` and `Walk.cycleBypass` do nothing Co-authored-by: Vlad Tsyrklevich --- - [ ] depends on: #37577 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-combinatorics blocked-by-other-PR 160/79 Mathlib/Combinatorics/SimpleGraph/Paths.lean,Mathlib/Combinatorics/SimpleGraph/Walk/Basic.lean,Mathlib/Combinatorics/SimpleGraph/Walk/Decomp.lean,Mathlib/Combinatorics/SimpleGraph/Walk/Operations.lean 4 8 ['IvanRenison', 'SnirBroshi', 'github-actions', 'mathlib-dependent-issues', 'mathlib-merge-conflicts', 'vlad902'] nobody 1
18-85704
18 days ago
18-85705
18 days ago
0-1043
17 minutes
38170 maddycrim
author:maddycrim
 feat(Algebra/Module/FinitePresentation): Finitely Presented Module Lemma From FLT Project Main Definitions: `Module.FinitePresentation.exists_fin_exact` : A finitely presented module M admits an exact sequence F' -> F -> M -> 0 where F' and F are finite free modules. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra new-contributor awaiting-author
label:t-algebra$
 9/0 Mathlib/Algebra/Module/FinitePresentation.lean 1 17 ['chrisflav', 'github-actions', 'maddycrim', 'themathqueen', 'vlad902'] nobody 1
17-49833
17 days ago
17-49833
17 days ago
17-43852
17 days
36686 euprunin
author:euprunin
 chore: golf using `grind` The goal of this PR is to decrease the number of times lemmas are called explicitly. Any decrease in compilation time is a welcome side effect, although it is not a primary objective. Trace profiling results (differences <30 ms considered measurement noise): * `List.prod_map_ite`: unchanged 🎉 * `Path.Homotopy.trans_assoc_reparam`: 2938 ms before, 717 ms after 🎉 * `SimplexCategory.δ_comp_δ`: 522 ms before, 316 ms after 🎉 * `Finsupp.ext_iff'`: unchanged 🎉 * `Computation.bind_assoc`: unchanged 🎉 * `Set.piecewise_insert`: unchanged 🎉 * `ZMod.valMinAbs_mem_Ioc`: unchanged 🎉 * `Matrix.det_eq_of_forall_row_eq_smul_add_pred_aux`: 2141 ms before, 2004 ms after 🎉 Profiled using `set_option trace.profiler true in`. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) awaiting-author 11/50 Mathlib/Algebra/BigOperators/Group/List/Basic.lean,Mathlib/AlgebraicTopology/FundamentalGroupoid/Basic.lean,Mathlib/AlgebraicTopology/SimplexCategory/Basic.lean,Mathlib/Data/Finsupp/Defs.lean,Mathlib/Data/Seq/Computation.lean,Mathlib/Data/Set/Piecewise.lean,Mathlib/Data/ZMod/ValMinAbs.lean,Mathlib/LinearAlgebra/Matrix/Determinant/Basic.lean 8 14 ['artie2000', 'chenson2018', 'dagurtomas', 'euprunin', 'github-actions', 'mathlib-merge-conflicts', 'ooovi'] dagurtomas
assignee:dagurtomas
 2
17-7087
17 days ago
17-7090
17 days ago
49-23305
49 days
37955 artie2000
author:artie2000
 feat(Algebra/Polynomial): lemmas about `modByMonic` * Add various small lemmas about `Polynomial.modByMonic` * Remove unneccesary commutativity assumption on `Polynomial.aeval_eq_zero_of_dvd_aeval_eq_zero` by proving `Polynomial.aeval_dvd` --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra delegated
label:t-algebra$
 20/6 Mathlib/Algebra/Polynomial/AlgebraMap.lean,Mathlib/Algebra/Polynomial/Div.lean,Mathlib/Algebra/Polynomial/RingDivision.lean,Mathlib/FieldTheory/Minpoly/Basic.lean,Mathlib/RingTheory/Polynomial/IsIntegral.lean 5 4 ['github-actions', 'mathlib-bors', 'ocfnash'] ocfnash
assignee:ocfnash
 1
16-5655
16 days ago
16-5655
16 days ago
24-18920
24 days
38873 yuanyi-350
author:yuanyi-350
 refactor(MeasureTheory): golf `Mathlib/MeasureTheory/Constructions/BorelSpace/Real` - rewrites `measurable_const_mul` by splitting off the `c = 0` case and proving the nonzero case via `measurable_of_continuousOn_compl_singleton` - replaces the ad hoc case analysis on `⊥`, `⊤`, and real coefficients with a direct continuity argument for multiplication on `EReal` Extracted from #38104 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) codex LLM-generated t-measure-probability 5/19 Mathlib/MeasureTheory/Constructions/BorelSpace/Real.lean 1 3 ['LorenzoLuccioli', 'github-actions', 'yuanyi-350'] kex-y
assignee:kex-y
 1
15-58993
15 days ago
15-78303
15 days ago
19-2724
19 days
38702 jcommelin
author:jcommelin
 chore(Data/Real): encapsulate real numbers This PR: * hides the definition of the real numbers * preserves defeqs when casting `Nat`, `Int`, `Rat`, into the reals * preserves the defeq `x - y = x + (-y)` for `x y : Real` * removes a bunch of technical debt * adjusts imports in the library, where files relied on getting access to Cauchy sequences transitively via importing the reals. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) delegated 235/256 Archive/Imo/Imo2013Q5.lean,Counterexamples/SeminormLatticeNotDistrib.lean,Mathlib.lean,Mathlib/Analysis/Complex/Norm.lean,Mathlib/Analysis/RCLike/Basic.lean,Mathlib/Analysis/Real/Cardinality.lean,Mathlib/Combinatorics/SimpleGraph/Triangle/Counting.lean,Mathlib/Data/Complex/Basic.lean,Mathlib/Data/ENNReal/Basic.lean,Mathlib/Data/NNReal/Defs.lean,Mathlib/Data/Real/Archimedean.lean,Mathlib/Data/Real/Basic.lean,Mathlib/Data/Real/Cauchy.lean,Mathlib/Data/Real/Sign.lean,Mathlib/NumberTheory/Padics/PadicIntegers.lean,Mathlib/NumberTheory/Padics/PadicNumbers.lean,Mathlib/NumberTheory/SelbergSieve.lean,Mathlib/Topology/Algebra/Ring/Real.lean,Mathlib/Topology/Instances/Real/Lemmas.lean,Mathlib/Topology/MetricSpace/CauSeqFilter.lean,Mathlib/Topology/UniformSpace/CompareReals.lean,Mathlib/Topology/UniformSpace/Real.lean,MathlibTest/Complex.lean,MathlibTest/Quaternion.lean,MathlibTest/Real.lean,MathlibTest/peel.lean 26 31 ['JovanGerb', 'Kha', 'YaelDillies', 'eric-wieser', 'fpvandoorn', 'github-actions', 'jcommelin', 'leanprover-radar', 'mathlib-bors', 'riccardobrasca', 'sgouezel', 'wkrozowski'] nobody 1
15-33272
15 days ago
23-35622
23 days ago
0-2637
43 minutes
38223 Deicyde
author:Deicyde
 feat(Geometry/Manifold): add `MfldCat`, the category of `C^n` manifolds We define `MfldCat 𝕜 n`: the category of `C^n` manifolds over a field `𝕜`, following the pattern of `TopCat` in `Mathlib.Topology.Category.TopCat.Basic`. We also implement `HasForget₂ (MfldCat 𝕜 n) TopCat`—the forgetful functor into the category of topological spaces. For more discussion see the Zulip thread: [#PR reviews > #38223 The Category of C^n Manifolds](https://leanprover.zulipchat.com/#narrow/channel/144837-PR-reviews/topic/.2338223.20The.20Category.20of.20C.5En.20Manifolds/with/587038032) Also added: `ContMDiffMap.id_apply`, `.coe_id` and `.coe_comp` which are comparable to `ContinuousMap` API. ### Future work - ✅ Define a Monoidal structure via product manifolds, analogous to `Manifold.Topology.Category.TopCat.Monoidal` #38560 - ✅ Define the tangent functor: `M ↦ TM`, `F ↦ F.tangentMap` from `MfldCat (n+1) 𝕜` to `MfldCat n 𝕜` #38270 - Functor `FGModuleCat 𝕜 ⥤ MfldCat 𝕜 n` sending a finite-dimensional `𝕜`-vector space to the manifold modeled on itself. Left as `TODO`. - Define `FGModuleCat 𝕜` as an enriched category over `MfldCat n 𝕜`. Then _smooth functors_ can be realized as endofunctors on the enriched category. This is the main motivation for this construction. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-differential-geometry new-contributor t-category-theory 224/0 Mathlib.lean,Mathlib/Geometry/Manifold/Category/MfldCat/Basic.lean,Mathlib/Geometry/Manifold/ContMDiffMap.lean 3 57 ['Deicyde', 'chrisflav', 'dagurtomas', 'github-actions', 'idontgetoutmuch', 'peabrainiac'] kim-em
assignee:kim-em
 1
14-4140
14 days ago
14-7564
14 days ago
27-57392
27 days
38943 felixpernegger
author:felixpernegger
 feat(Topology/CWComplex/Classical): discrete spaces are CW complexes as well as some useful lemmas This is partly based on code by @scholzhannah I think this is notable to include, since it is pretty much the only (easy) "topological" sufficient condition for something being a CW complex there is. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-topology 89/3 Mathlib/Topology/CWComplex/Classical/Basic.lean,Mathlib/Topology/DiscreteSubset.lean 2 28 ['felixpernegger', 'github-actions', 'scholzhannah'] PatrickMassot
assignee:PatrickMassot
 1
13-74914
13 days ago
16-45768
16 days ago
17-59517
17 days
38328 astrainfinita
author:astrainfinita
 feat: `OrderSupSet` This PR introduces `OrderSupSet` and `OrderInfSet`, which are typeclasses expressing that `sSup` (resp., `sInf`) returns the least upper bound (resp., the greatest lower bound) of a set whenever one exists. This allows us to prove properties about the `sSup` of specific sets (such as `∅`, singletons, finite sets, and `univ`) without any typeclasses asserting the existence of LUBs. For example, `sSup ∅ = ⊥` holds for any type equipped with `OrderBot` `OrderSupSet`, no longer requiring typeclasses like `ConditionallyCompleteLinearOrderBot`. For a general set `s`, this gives a uniform way to extend results about `IsLUB s a → motive a` to `motive (sSup s)`, `motive (⨆ i, f i)`, `motive (a ⊔ b)`, etc., which allows proof reuse for basic API such as [`csSup_insert`](https://leanprover-community.github.io/mathlib4_docs/Mathlib/Order/ConditionallyCompleteLattice/Basic.html#csSup_insert), [`iSup_insert`](https://leanprover-community.github.io/mathlib4_docs/Mathlib/Order/CompleteLattice/Basic.html#iSup_insert), and [`sSup_insert`](https://leanprover-community.github.io/mathlib4_docs/Mathlib/Order/CompleteLattice/Basic.html#sSup_insert) and downstream code like [`csSup_add`](https://leanprover-community.github.io/mathlib4_docs/Mathlib/Algebra/Order/Group/Pointwise/CompleteLattice.html#csSup_add), [`sSup_add`](https://leanprover-community.github.io/mathlib4_docs/Mathlib/Algebra/Order/Group/Pointwise/CompleteLattice.html#sSup_add), and [`sup_add`](https://leanprover-community.github.io/mathlib4_docs/Mathlib/Algebra/Order/Group/Lattice.html#sup_add). Furthermore, this allows us to refactor incrementally, reducing the dependency of results about various completeness typeclasses on the specific implementation of `sSup`. --- [Zulip](https://leanprover.zulipchat.com/#narrow/channel/113488-general/topic/Any.20infimum.20based.20version.20of.20.60OmegaCompletePartialOrder.60.3F) [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-order 156/73 Mathlib/MeasureTheory/OuterMeasure/Induced.lean,Mathlib/Order/Bounds/Basic.lean,Mathlib/Order/Bounds/Defs.lean,Mathlib/Order/CompleteLattice/Basic.lean,Mathlib/Order/CompleteLattice/Defs.lean,Mathlib/Order/SetNotation.lean,Mathlib/Topology/UniformSpace/OfCompactT2.lean 7 16 ['JovanGerb', 'astrainfinita', 'b-mehta', 'github-actions', 'j-loreaux', 'mathlib-merge-conflicts', 'openendings', 'vihdzp'] nobody 1
13-53064
13 days ago
13-53103
13 days ago
18-83523
18 days
37464 martinwintermath
author:martinwintermath
 feat(Geometry/Convex/Cone): Minor additions to pointed cones Minor additions to pointed cones: * `PointedCone.ofSubmodule_le_ofSubmodule` and `PointedCone.ofSubmodule_lt_ofSubmodule`. These are not made simp lemmas, instead the underlying `Submodule.restrictScalars_le` and `Submodule.restrictScalars_lt` have been changed into simp lemmas. * `PointedCone.hull_le_span` as a short form of `Submodule.span_le_restrictScalars R≥0 R s` Co-authored by: Artie Khovanov --- In preparation of #36605. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-convex-geometry maintainer-merge 22/16 Mathlib/Algebra/Module/Submodule/RestrictScalars.lean,Mathlib/Geometry/Convex/Cone/Pointed.lean 2 24 ['YaelDillies', 'artie2000', 'github-actions', 'justus-springer', 'martinwintermath', 'mathlib-merge-conflicts', 'ooovi', 'vihdzp'] nobody 4
11-25617
11 days ago
13-52429
13 days ago
50-65166
50 days
37053 artie2000
author:artie2000
 refactor(Analysis/Convex/Cone): use `PointedCone` in Riesz extension theorem Change the statement of the Riesz extension theorem to take a `PointedCone` rather than a `ConvexCone`. This PR is part of a series replacing `ConvexCone` with `PointedCone`. https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/Replacing.20.60ConvexCone.60.20with.20.60PointedCone.60/near/581184307 --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-convex-geometry maintainer-merge merge-conflict 15/12 Mathlib/Analysis/Convex/Cone/Extension.lean,Mathlib/Geometry/Convex/Cone/Pointed.lean 2 9 ['YaelDillies', 'artie2000', 'github-actions', 'mathlib-merge-conflicts', 'ocfnash'] nobody 1
11-630
11 days ago
11-631
11 days ago
46-71615
46 days
36605 martinwintermath
author:martinwintermath
 feat(Geometry/Convex/Cone): Add lemmas about interaction of hull, span and negation Prove lemmas about the interaction of hull, span and negation. Main additions: * `PointedCone.toSubmodule` that produces a submodule with the same support given that `-C = C`. Also the corresponding `CanLift` * `PointedCone.hull_neg_pair_eq_span_singleton` proving `hull R {-x, x} = R ∙ x` (simp lemma) * `PointedCone.span_eq_hull_neg_sup_hull` proving `span R s = hull R (-s) ⊔ hull R s` * `PointedCone.mem_span` proving `x ∈ span R C ↔ ∃ p, n ∈ C, x = p - n` Considerations: there are several ways to express that a convex cone is a submodule: * `-C = C` * `-C ≤ C` or `C ≤ -C` * `C = span R C` * `C = C.lineal` The consensus was that the the first option is the most direct way to express this property, which then allows to lift to a submodule. Co-authored by: Olivia Röhrig, Kilian Rueß, Artie Khovanov --- - [ ] depends on: #37464 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) blocked-by-other-PR t-convex-geometry 90/12 Mathlib/Geometry/Convex/Cone/Pointed.lean 1 53 ['artie2000', 'github-actions', 'martinwintermath', 'mathlib-dependent-issues', 'mathlib-merge-conflicts'] nobody 1
11-551
11 days ago
51-83073
51 days ago
17-402
17 days
39230 bryangingechen
author:bryangingechen
 chore: extract API from #38807 and golf I wanted to understand why these two proofs in #38807 were long (and also play around more with the API in this corner of the library) so I walked through them with Claude Opus. prepared with Claude code t-order LLM-generated 23/37 Mathlib/Order/Bounds/Basic.lean,Mathlib/Order/DirSupClosed.lean 2 2 ['github-actions', 'vihdzp'] nobody 1
9-84085
9 days ago
10-72321
10 days ago
10-72033
10 days
36202 vihdzp
author:vihdzp
 feat: more theorems on the Cantor normal form We also remove some redundant assumptions. Used in the CGT repo. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-set-theory 68/17 Mathlib/SetTheory/Ordinal/CantorNormalForm.lean 1 21 ['SnirBroshi', 'YaelDillies', 'github-actions', 'mathlib-merge-conflicts', 'vihdzp'] YaelDillies
assignee:YaelDillies
 1
9-46007
9 days ago
58-45556
58 days ago
77-37229
77 days
36388 SnirBroshi
author:SnirBroshi
 feat(Combinatorics/SimpleGraph/AdjMatrix): submatrices and homomorphisms --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-combinatorics maintainer-merge 73/3 Mathlib/Combinatorics/SimpleGraph/AdjMatrix.lean 1 19 ['SnirBroshi', 'YaelDillies', 'eric-wieser', 'github-actions', 'mathlib-merge-conflicts', 'themathqueen'] nobody 1
9-37888
9 days ago
9-74466
9 days ago
39-24733
39 days
38114 javgomzar
author:javgomzar
 feat(FinitelyPresentedGroup): add finite groups instance Add IsFinitelyPresented instance for finite groups. Co-authored-by: Hang Lu Su , Thomas Browning --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-group-theory new-contributor large-import 31/2 Mathlib/GroupTheory/FinitelyPresentedGroup.lean,Mathlib/GroupTheory/FreeGroup/Basic.lean 2 33 ['github-actions', 'javgomzar', 'kbuzzard', 'mathlib-merge-conflicts', 'plp127', 'tb65536', 'vihdzp'] mattrobball
assignee:mattrobball
 1
9-13115
9 days ago
9-13151
9 days ago
32-10600
32 days
37928 AlexeyMilovanov
author:AlexeyMilovanov
 refactor(Computability.Encoding): unbundle Γ and remove FinEncoding This PR unbundles the alphabet `Γ` from the `Encoding` structure and completely removes `FinEncoding`. `Encoding`: The alphabet `Γ` is now an explicit parameter: `structure Encoding (α : Type u) (Γ : Type v)`. `FinEncoding`: Removed. Finiteness is now handled via standard typeclasses (e.g., `[Fintype Γ] (e : Encoding α Γ)`). Combinators: Functions like `finEncodingPair` are simplified to `encodingPair`, dropping the `fin` prefix and `[Fintype]` requirements where no longer needed. Downstream: Mechanically updated `Mathlib.Computability` and `Mathlib.ModelTheory` to pass the explicit `Γ` and use `[Fintype Γ]` where `FinEncoding` was previously required. new-contributor maintainer-merge 87/67 Mathlib/Computability/Encoding.lean,Mathlib/ModelTheory/Encoding.lean 2 9 ['AlexeyMilovanov', 'dagurtomas', 'github-actions', 'vihdzp'] nobody 1
8-79376
8 days ago
15-43954
15 days ago
41-23522
41 days
36743 Jun2M
author:Jun2M
 feat(Combinatorics/GraphLike): introduce `GraphLike` typeclass Per discussion at ([#graph theory > HasAdj](https://leanprover.zulipchat.com/#narrow/channel/252551-graph-theory/topic/HasAdj/with/575843445)), This PR introduces the `GraphLike` typeclass to capture the notions like `dart` and `walk` across various graph objects, such as `SimpleGraph`, `Graph`, and `Digraph`. The goal is that by abstracting these core components into a typeclass, we can prove these results once for all graph-like structures rather than duplicating them across different graph types. ### Main definitions * `GraphLike V D E Gr`: A typeclass parameterized by a vertex type `V`, dart type `D` and a graph type `Gr` (with `V`, `D` & `E` as an `outParam`). * `GraphLike.verts : Set V`: The set of vertices of the graph. * `GraphLike.darts : Set D`: The set of darts of the graph. * `GraphLike.edges : Set E`: The set of edges of the graph. * `GraphLike.Adj : V → V → Prop`: The adjacency relation, defined by default as `∃ d ∈ darts, fst d = u ∧ snd d = v`. --- This PR generalises #35776 to also unify `Graph`. PRs depending on this PR are #39047 (graphLike with no multi edges) => #39050 (Digraph is graphLike) || V #36829 (undirected graphLike) => #39053 (Graph is graphLike) & #39054 (Simplegraph is graphLike) || V #36756 (def of walk on GraphLike) => #36971 (change Simplegraph to use GraphLike walk) [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-combinatorics 104/0 Mathlib.lean,Mathlib/Combinatorics/GraphLike/Basic.lean 2 78 ['IvanRenison', 'Jun2M', 'SnirBroshi', 'YaelDillies', 'github-actions', 'lauramonk', 'mathlib-merge-conflicts'] YaelDillies
assignee:YaelDillies
 1
8-63038
8 days ago
14-20190
14 days ago
65-18318
65 days
39064 kim-em
author:kim-em
 feat: make showLinter detect tactics that assign metavariables This PR removes a short-circuit in `showLinter` that suppressed the linter whenever the syntactic goal was unchanged by a `show` tactic. A `show` invocation can still have side-effects on the metavariable context — tactic elaboration may assign metavariables while leaving the goal type unchanged — so the existing `instantiateMVars`-based diff check should run unconditionally. The fast path for the genuine no-op case is preserved: if `before` and `after` types still match after `instantiateMVars`, the linter doesn't fire. This was discovered while adapting Mathlib to nightly-2026-05-03 in https://github.com/leanprover-community/mathlib4-nightly-testing/pull/215 and is being extracted here so it can land independently of that bump. 🤖 Prepared with Claude Code t-linter delegated 1/1 Mathlib/Tactic/Linter/Style.lean 1 3 ['adomani', 'github-actions', 'joneugster', 'mathlib-bors'] thorimur
assignee:thorimur
 1
8-31442
8 days ago
8-31443
8 days ago
6-25575
6 days
36155 grunweg
author:grunweg
 feat: custom elaborators for TangentSpace and tangentMap(Within) And use these to golf the differential geometry files a bit further. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-differential-geometry t-meta awaiting-author 85/30 Mathlib/Geometry/Manifold/ContMDiffMFDeriv.lean,Mathlib/Geometry/Manifold/GroupLieAlgebra.lean,Mathlib/Geometry/Manifold/IntegralCurve/Basic.lean,Mathlib/Geometry/Manifold/MFDeriv/SpecificFunctions.lean,Mathlib/Geometry/Manifold/MFDeriv/Tangent.lean,Mathlib/Geometry/Manifold/Notation.lean,Mathlib/Topology/FiberBundle/Constructions.lean,MathlibTest/DifferentialGeometry/Notation/Basic.lean 8 7 ['JovanGerb', 'github-actions', 'grunweg', 'mathlib-merge-conflicts', 'ocfnash'] JovanGerb
assignee:JovanGerb
 1
8-26157
8 days ago
8-26157
8 days ago
69-16913
69 days
38983 kebekus
author:kebekus
 feat: Invariance of `meromorphic in normal form` under composition. Establish invariance of `meromorphic in normal form` under composition with analytic functions of non-vanishing derivative. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-analysis maintainer-merge 42/0 Mathlib/Analysis/Meromorphic/NormalForm.lean 1 12 ['github-actions', 'kebekus', 'themathqueen'] themathqueen
assignee:themathqueen
 1
8-23919
8 days ago
8-23919
8 days ago
15-44630
15 days
37722 SabrinaJewson
author:SabrinaJewson
 feat(Order/Cover): intervals equal singletons iff To complement `Set.Icc_eq_singleton_iff`, this introduces: - `Set.Ioc_eq_singleton_iff` / `Set.Ico_eq_singleton_iff` - `Set.Ico_eq_singleton_left_iff` / `Set.Ioc_eq_singleton_right_iff` - `Set.Ioi_eq_singleton_iff` / `Set.Iio_eq_singleton_iff` - `Set.Ioi_eq_singleton_top_iff` / `Set.Iio_eq_singleton_bot_iff` - `Set.Ioo_eq_singleton_iff` --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-order new-contributor awaiting-author maintainer-merge 39/0 Mathlib/Order/Atoms.lean,Mathlib/Order/Cover.lean 2 16 ['Komyyy', 'SabrinaJewson', 'github-actions', 'mathlib-merge-conflicts'] bryangingechen
assignee:bryangingechen
 1
8-12467
8 days ago
10-51824
10 days ago
35-12445
35 days
36541 BGuillemet
author:BGuillemet
 feat(CategoryTheory): define internal equivalence relations Define internal equivalence relations in any category `C`, as a structure on parallel pairs of morphisms. Prove that equivalence relations on types are equivalence relations in the category of types. Prove that kernel pairs are equivalence relations. Define (universally) effective equivalence relations, and a associated class for categories in which every equivalence relation is effective universal. Prove that an effective equivalence relation yields a coequalizer diagram, and that the associated projection on the "quotient" of the relation is a regular epimorphism. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-category-theory 320/0 Mathlib.lean,Mathlib/CategoryTheory/EquivalenceRelation.lean,Mathlib/CategoryTheory/Limits/Shapes/RegularMono.lean 3 26 ['BGuillemet', 'chrisflav', 'dagurtomas', 'github-actions', 'robin-carlier'] b-mehta
assignee:b-mehta
 1
8-2163
8 days ago
8-33329
8 days ago
29-45705
29 days
37623 IvanRenison
author:IvanRenison
 feat(Order/RelIso): add theorems about `RelHom.comp` and `RelEmbedding.trans` Co-authored-by: SnirBroshi <26556598+SnirBroshi@users.noreply.github.com> --- Missing of this theorems noticed by @SnirBroshi in #37598 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-order maintainer-merge 18/0 Mathlib/Order/RelIso/Basic.lean 1 8 ['IvanRenison', 'SnirBroshi', 'dagurtomas', 'eric-wieser', 'github-actions'] nobody 1
7-45288
7 days ago
47-18758
47 days ago
48-42005
48 days
39296 scholzhannah
author:scholzhannah
 feat: more informative output messages in the flexible linter The current output messages in the flexible linter are: - If the stained location is a hypothesis: `'exact h' uses 'h'!` - If the stained location is the goal: `'exact Nat.le_succ_of_le h' uses '⊢'!` I think the first is not very informative and the second is additionally confusing. So I change them to read: - For a hypothesis: `'exact h' uses 'h', which was modified by a flexible tactic!` - And for the goal: `'exact Nat.le_succ_of_le h' modifies the current goal, which was modified by a flexible tactic!` I also added some more explanation to the messages in the case that all the hypotheses and the goal were stained by `simp at *`. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-linter 128/25 Mathlib/Tactic/Linter/FlexibleLinter.lean,MathlibTest/FlexibleLinter.lean,MathlibTest/ImportHeavyFlexibleLinter.lean 3 6 ['b-mehta', 'github-actions', 'grunweg', 'scholzhannah'] grunweg
assignee:grunweg
 1
7-42316
7 days ago
7-42316
7 days ago
7-42028
7 days
38968 eric-wieser
author:eric-wieser
 fix: improve defeqs of comp actions The (deliberately) non-reducible `SMul.comp.smul` definition caused us to end with these failing unification examples at instance reducibility: ```lean example : (Module.compHom ℕ (RingHom.id ℕ)).toSMul = SMul.comp ℕ (RingHom.id ℕ) := by with_reducible_and_instances rfl example : (Module.compHom ℕ (RingHom.id ℕ)).toMulAction = MulAction.compHom ℕ (MonoidHom.id ℕ) := by with_reducible_and_instances rfl ``` There are two issues this fixes: * the `compHom` constructors are inconsistent on whether they use `SMul.comp.smul` or reimplement its contents * we need `SMul.comp.smul` to be instance-reducible, so that when invoked with the identity function it is instance-defeq to the original action. As a bonus, allowing these to unify means we can have a single `SMul.comp_smul_def` lemma that works for all of the `compHom` definitions. We could also consider changing `compHom` to take a `HomClass` in order to remove the casts entirely, which would remove the need to add these `SMul.comp` terms. This PR leaves that for possible future work, noting that in the past we have moved away from writing `def`s taking `HomClass`es. Co-authored-by: Junye Ji --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) Refined from #38777 t-algebra delegated
label:t-algebra$
 35/19 Mathlib/Algebra/Algebra/Defs.lean,Mathlib/Algebra/Group/Action/Defs.lean,Mathlib/Algebra/GroupWithZero/Action/Defs.lean,Mathlib/Algebra/GroupWithZero/Action/End.lean,Mathlib/Algebra/Module/RingHom.lean 5 5 ['JJYYY-JJY', 'Vierkantor', 'eric-wieser', 'github-actions', 'mathlib-bors'] nobody 1
7-35756
7 days ago
7-35756
7 days ago
8-53809
8 days
38731 martinwintermath
author:martinwintermath
 feat(LinearAlgebra/AffineSpace/AffineSubspace): using `AffineSubspace.direction` to reinterpret `AffineSubspace` as `Submodule` * add `AffineSubspace.vsub_self_of_zero_mem` that states `s -ᵥ s = s ` if `0 ∈ s` * add `AffineSubspace.direction_eq_self_of_zero_mem` that states that if `0 ∈ s`, then the directions coerce back to the affine subspace. * add corresponding `CanLift` instance. * modify doc-string of `AffineSubspace.direction` to state that this can be used for reinterpretation of an affine subspace as a submodule. * add `Coe` instance based on `Submodule.toAffineSubspace` and adds corresponding @[coe] attribute. The PR also performs a slight cleanup of the file: statements about `SetLike` or `Submodule.toAffineSubspace` have been moved closer to their respective definitions. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra
label:t-algebra$
 56/26 Mathlib/LinearAlgebra/AffineSpace/AffineSubspace/Defs.lean 1 3 ['github-actions', 'wwylele'] themathqueen
assignee:themathqueen
 1
6-74954
6 days ago
23-13305
23 days ago
23-14168
23 days
39438 SnirBroshi
author:SnirBroshi
 chore(Order/WellFounded): use `to_dual` Creates `argmax`/`argmaxOn` duals to the existing `argmin`/`argminOn`, and `WellFoundedLT.min`/`WellFoundedGT.max` in order to properly dualize `WellFounded.min_le`. Some theorems about `WellFounded{LT/GT}` which didn't have a dual before have to be renamed to make room, e.g. `StrictMono.range_inj` is renamed to `StrictMono.range_inj_of_wellFoundedLT`. --- This is blocking dualizing things in `ConditionallyCompleteLattice/Basic.lean`. `WellFounded.min_le` has ~30 usages in ~10 files, so deprecating it should probably happen in a separate PR. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-order 80/34 Mathlib/Data/Finset/Sort.lean,Mathlib/Order/Hom/Set.lean,Mathlib/Order/WellFounded.lean,Mathlib/SetTheory/Ordinal/Enum.lean 4 5 ['SnirBroshi', 'github-actions', 'vihdzp'] nobody 1
6-72863
6 days ago
6-72935
6 days ago
6-81243
6 days
37076 ertwro
author:ertwro
 feat(Combinatorics/SimpleGraph/Hasse): Hasse diagram is triangle-free Add `SimpleGraph.hasse_cliqueFree_three`: the Hasse diagram of a preorder is triangle-free (`CliqueFree 3`). This is the graph-theoretic formulation of `not_covBy_of_lt_of_lt`: if `a ⋖ b` and `b ⋖ c`, then `¬ a ⋖ c`, so no three elements can be pairwise adjacent in the Hasse diagram. The proof extracts three vertices from a hypothetical 3-clique, case-splits on the covering directions (8 cases), and closes each by `not_covBy_of_lt_of_lt` (6 transitive cases) or `lt_asymm` (2 cyclic cases). --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-combinatorics new-contributor 11/0 Mathlib/Combinatorics/SimpleGraph/Hasse.lean 1 21 ['Rida-Hamadani', 'SnirBroshi', 'ertwro', 'github-actions', 'vlad902'] nobody 1
6-60857
6 days ago
33-64333
33 days ago
41-73825
41 days
35683 gasparattila
author:gasparattila
 fix(Tactic/FunProp): detect `Continuous.subtype_mk` as compositional This PR changes `fun_prop` to detect some theorems involving dependent types, such as `Continuous.subtype_mk` to be in compositional form. This lets `fun_prop` solve goals such as `Continuous fun x => (⟨x, trivial⟩ : {x : ℝ // True})`. --- These theorems become compositional: `Continuous.subtype_mk`, `Topology.IsEmbedding.inclusion`, `Topology.IsOpenEmbedding.inclusion`, `Topology.IsClosedEmbedding.inclusion`, `Measurable.subtype_mk`, `Measurable.imp`, `Path.symm_continuous_family`, `Continuous.upperHalfPlaneMk` These theorems become simple: `hasFDerivAt_prodMk_left`, `hasFDerivAt_prodMk_right`, `contDiff_prodMk_left`, `contDiff_prodMk_right` [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-meta maintainer-merge 66/44 Mathlib/Tactic/FunProp/Core.lean,Mathlib/Tactic/FunProp/FunctionData.lean,Mathlib/Tactic/FunProp/Theorems.lean,Mathlib/Topology/Homeomorph/Lemmas.lean,MathlibTest/FunPropMinimal.lean 5 27 ['gasparattila', 'github-actions', 'grunweg', 'joneugster', 'lecopivo', 'mathlib-merge-conflicts'] joneugster
assignee:joneugster
 1
6-30443
6 days ago
6-30514
6 days ago
86-35794
86 days
39110 SnirBroshi
author:SnirBroshi
 chore(Data/Set): reduce defeq abuse of `Set α = α → Prop` These are among the first places that would fail if `Set α` wasn't defeq to `α → Prop`. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-data 35/20 Mathlib/Data/Set/Basic.lean,Mathlib/Data/Set/Defs.lean,Mathlib/Data/Set/Insert.lean,Mathlib/Data/Set/Prod.lean,Mathlib/Order/BooleanAlgebra/Set.lean 5 24 ['SnirBroshi', 'Vierkantor', 'github-actions', 'leanprover-radar', 'mathlib-bors', 'themathqueen', 'urkud', 'vihdzp'] nobody 1
6-29468
6 days ago
6-44419
6 days ago
12-45531
12 days
30526 SnirBroshi
author:SnirBroshi
 chore(Logic/Relation): use `≤` to spell subrelation Replace every `∀ x y, r x y → r' x y` with `r ≤ r'` --- NOTE: this PR began as an effort to use `Subrelation` since `≤` wasn't available in this file, but it was agreed on [Zulip](https://leanprover.zulipchat.com/#narrow/channel/144837-PR-reviews/topic/.2330526.20use.20Subrelation.20in.20Mathlib.2ELogic.2ERelation/with/546572676) to instead make `≤` available there. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-logic 146/133 Mathlib.lean,Mathlib/CategoryTheory/Action.lean,Mathlib/CategoryTheory/ConnectedComponents.lean,Mathlib/CategoryTheory/Filtered/Connected.lean,Mathlib/CategoryTheory/IsConnected.lean,Mathlib/CategoryTheory/Limits/Final.lean,Mathlib/CategoryTheory/Limits/Types/Coequalizers.lean,Mathlib/CategoryTheory/Limits/Types/Filtered.lean,Mathlib/Combinatorics/Enumerative/DyckWord.lean,Mathlib/Combinatorics/SimpleGraph/Connectivity/Connected.lean,Mathlib/Computability/ContextFreeGrammar.lean,Mathlib/Computability/TuringMachine/Config.lean,Mathlib/GroupTheory/FreeGroup/Basic.lean,Mathlib/Logic/Relation.lean,Mathlib/Order/Basic.lean,Mathlib/Order/Defs/Prop.lean,Mathlib/Order/Interval/Finset/Basic.lean,Mathlib/Order/WellFoundedSet.lean,Mathlib/Topology/Gluing.lean 19 22 ['SnirBroshi', 'Vierkantor', 'eric-wieser', 'github-actions', 'joneugster', 'mathlib-merge-conflicts', 'mathlib4-merge-conflict-bot', 'thorimur', 'vihdzp'] Vierkantor and joneugster
assignee:Vierkantor assignee:joneugster
 1
6-22247
6 days ago
6-22391
6 days ago
88-55068
88 days
32583 MJ141592
author:MJ141592
 refactor(SimpleGraph): change bridges not to require the edge to be present Remove the requirement for edges to exist in definition of isBridge, and then change the related lemmas to adjust for this, by renaming, fixing the statements and fixing the proofs, including in Acyclic. Closes #31690. --- - [x] depends on: #36802 - [x] depends on: #36804 t-combinatorics new-contributor 95/93 Mathlib/Combinatorics/SimpleGraph/Acyclic.lean,Mathlib/Combinatorics/SimpleGraph/Connectivity/Connected.lean,Mathlib/Combinatorics/SimpleGraph/Connectivity/EdgeConnectivity.lean,Mathlib/Combinatorics/SimpleGraph/DeleteEdges.lean,Mathlib/Combinatorics/SimpleGraph/Hamiltonian.lean 5 47 ['MJ141592', 'Rida-Hamadani', 'SnirBroshi', 'YaelDillies', 'b-mehta', 'github-actions', 'mathlib-dependent-issues', 'mathlib-merge-conflicts', 'mathlib4-merge-conflict-bot'] nobody 2
6-18067
6 days ago
6-19613
6 days ago
48-79568
48 days
35287 arnoudvanderleer
author:arnoudvanderleer
 feat(AlgebraicTopology/SimplicialSet): define isomorphisms in simplicial sets, and the coherent isomorphism simplicial set show that any edge in a simplicial set, that is the image of the forward edge of the coherent isomorphism under a simplicial set morphism, is an isomorphism. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebraic-topology new-contributor infinity-cosmos awaiting-author 362/3 Mathlib.lean,Mathlib/AlgebraicTopology/SimplicialSet/CoherentIso.lean,Mathlib/AlgebraicTopology/SimplicialSet/CompStruct.lean,Mathlib/AlgebraicTopology/SimplicialSet/NerveCodiscrete.lean,Mathlib/AlgebraicTopology/SimplicialSet/StdSimplex.lean,Mathlib/CategoryTheory/CodiscreteCategory.lean 6 122 ['arnoudvanderleer', 'dagurtomas', 'github-actions', 'joelriou', 'mathlib-merge-conflicts', 'robin-carlier'] robin-carlier
assignee:robin-carlier
 1
6-16554
6 days ago
6-16554
6 days ago
31-932
31 days
38911 Vierkantor
author:Vierkantor
 chore(Tactic): deprecate `substs` and replace it with `subst` The `substs` tactic was a wrapper around `subst` to call it multiple times for different hypotheses. But `subst` now supports multiple hypotheses, so we can deprecate `substs` and replace it with `subst`. I added a deprecation warning using a `Try this:` message. Spotted while checking tactic docstrings. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-meta delegated 46/42 Archive/Examples/IfNormalization/WithoutAesop.lean,Mathlib/Algebra/Homology/DifferentialObject.lean,Mathlib/Algebra/Homology/HomologicalComplex.lean,Mathlib/Algebra/Homology/HomotopyCategory/HomComplex.lean,Mathlib/AlgebraicGeometry/StructureSheaf.lean,Mathlib/AlgebraicTopology/ExtraDegeneracy.lean,Mathlib/Analysis/Calculus/FDeriv/Comp.lean,Mathlib/CategoryTheory/Preadditive/Mat.lean,Mathlib/Computability/DFA.lean,Mathlib/Data/Analysis/Filter.lean,Mathlib/Data/Finset/Sort.lean,Mathlib/Data/List/Sigma.lean,Mathlib/Data/WSeq/Basic.lean,Mathlib/Geometry/RingedSpace/Stalks.lean,Mathlib/LinearAlgebra/Alternating/DomCoprod.lean,Mathlib/Logic/Equiv/Defs.lean,Mathlib/Logic/Equiv/PartialEquiv.lean,Mathlib/Order/Concept.lean,Mathlib/Order/JordanHolder.lean,Mathlib/SetTheory/Ordinal/Notation.lean,Mathlib/Tactic/Substs.lean,Mathlib/Topology/Gluing.lean 22 17 ['JovanGerb', 'Vierkantor', 'bryangingechen', 'github-actions', 'grunweg', 'j-loreaux', 'mathlib-bors', 'plp127'] thorimur
assignee:thorimur
 1
5-79637
5 days ago
12-79990
12 days ago
5-44109
5 days
32828 Hagb
author:Hagb
 feat(Algebra/Order/Group/Defs): add `IsOrderedAddMonoid.toIsOrderedCancelAddMonoid'` It is similar to `IsOrderedAddMonoid.toIsOrderedCancelAddMonoid`, while with different hypotheses. The conclusion `IsOrderedCancelMonoid α` on `IsOrderedAddMonoid.toIsOrderedCancelAddMonoid` still holds when the hypothesis `CommGroup α` is weakened to `CancelCommMonoid α` while `PartialOrder α` is strengthened to `LinearOrder α`. --- [`IsOrderedAddMonoid.toIsOrderedCancelAddMonoid`](https://leanprover-community.github.io/mathlib4_docs/find/?pattern=IsOrderedAddMonoid.toIsOrderedCancelAddMonoid#doc) and `IsOrderedAddMonoid.toIsOrderedCancelAddMonoid'`: https://github.com/leanprover-community/mathlib4/blob/97f78b1a4311fed1844b94f1c069219a48a098e1/Mathlib/Algebra/Order/Group/Defs.lean#L52-L62 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) awaiting-zulip t-algebra awaiting-author
label:t-algebra$
 4/0 Mathlib/Algebra/Order/Group/Defs.lean 1 15 ['Garmelon', 'Hagb', 'Vierkantor', 'artie2000', 'dagurtomas', 'github-actions', 'leanprover-radar'] eric-wieser
assignee:eric-wieser
 2
5-72742
5 days ago
120-22765
120 days ago
40-42357
40 days
38536 CoolRmal
author:CoolRmal
 feat: a lemma about the symmetric difference of unions Created with the help of Codex. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-data easy delegated 58/2 Mathlib/Data/Set/Lattice.lean,Mathlib/Order/CompleteBooleanAlgebra.lean 2 17 ['CoolRmal', 'SnirBroshi', 'eric-wieser', 'github-actions', 'mathlib-bors', 'ocfnash'] nobody 1
5-65532
5 days ago
8-12921
8 days ago
7-75625
7 days
39203 FordUniver
author:FordUniver
 refactor(Analysis/Calculus/Gradient): ungate inner_gradient lemmas Removes superfluous differentiability hypotheses (plus `UniqueDiffWithinAt` for the `Within` versions) from the four `inner_gradient[Within]_[left|right]` lemmas: `gradient` is defined as `(toDual 𝕜 F).symm (fderiv 𝕜 f x)`, so `⟪∇ f x, y⟫ = fderiv 𝕜 f x y` holds unconditionally since both sides are zero when `f` is not differentiable at `x`. --- Genuinely unsure about this one because the only call I currently have in my code itself has the differentiability hypothesis. But including unused (or unnecessary) assumptions seems not intentional? My best guess is that the hypotheses were included by analogy with `HasGradientAt.fderiv_apply`, which genuinely needs them. This PR drops the hypotheses and rewrites the proofs through the isomorphism directly; no existing mathlib callers pass the now-redundant arguments. t-analysis maintainer-merge 17/10 Mathlib/Analysis/Calculus/Gradient/Basic.lean 1 6 ['FordUniver', 'Komyyy', 'github-actions'] urkud
assignee:urkud
 1
5-17268
5 days ago
11-27458
11 days ago
11-27170
11 days
39307 FordUniver
author:FordUniver
 feat(Combinatorics/SimpleGraph/Copy): introduce `UnlabeledCopy` carrier subtype Adds `abbrev UnlabeledCopy A B := {B' : B.Subgraph // Nonempty (A ≃g B'.coe)}` and uses it to replace the previous inline filter-set body of `copyCount G H`. Drops the now unused legacy Finset-image bridge `copyCount_eq_card_image_copyToSubgraph`. Adds `uniqueUnlabeledCopyBot` instance so `copyCount_bot` is a one-liner via `Fintype.card_unique`. --- **Step 1/5 of the `Copy` / `InducedCopy` refactor-feat stack.** This PR isolates the `UnlabeledCopy` type introduction and the count's type-form redefinition from the larger rename/convention work in the rest of the stack. Note that resolving the current clash in naming (`Copy` and `UnlabeledCopy` vs `labelledCopyCount` and `copyCount`) is part of #38745. t-combinatorics 32/29 Mathlib/Combinatorics/SimpleGraph/Copy.lean 1 6 ['FordUniver', 'github-actions', 'mathlib-bors', 'mitchell-horner'] nobody 1
5-14015
5 days ago
5-23299
5 days ago
9-22985
9 days
36954 FMLJohn
author:FMLJohn
 feat(Topology/ClosedBases): `TopologicalSpace.IsClosedBasis` and `TopologicalSpace.IsClosedSubbasis s` In this pull request, I have defined closed bases and closed subbases of topologies, and proved some basic properties of them. ## Main definitions * `TopologicalSpace.IsClosedBasis s`: A closed basis of a topological space `α` is a collection of closed sets `s : Set (Set α)` such that every closed subset of `α` can be written as an intersection of elements of `s`. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-topology 117/0 Mathlib.lean,Mathlib/Topology/Bases.lean,Mathlib/Topology/ClosedBases.lean 3 19 ['github-actions', 'scholzhannah'] urkud
assignee:urkud
 1
5-9006
5 days ago
29-35761
29 days ago
58-37799
58 days
39287 xgenereux
author:xgenereux
 feat(Localization/AtPrime/Basic): upgrade `equivQuotMaximalIdeal` to an AlgEquiv The definition [IsLocalization.AtPrime.equivQuotMaximalIdealPow](https://leanprover-community.github.io/mathlib4_docs/Mathlib/RingTheory/Localization/AtPrime/Basic.html#IsLocalization.AtPrime.equivQuotMaximalIdealPow) was added in #36783. The case with `n = 1` is still important and interesting. I have upgraded it to an AlgEquiv using `equivQuotMaximalIdealPow`. This did break a few small things, because we need to bridge back to a `RingEquiv` in some places. I took the liberty to add some missing `apply` lemmas to ease fixing these proofs. Disclaimer: I used Claude to suggest the first shot and refined it from there. María Inés de Frutos Fernández <[mariaines.dff@gmail.com](mailto:mariaines.dff@gmail.com)> --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-ring-theory merge-conflict 45/68 Mathlib/RingTheory/Localization/AtPrime/Basic.lean,Mathlib/RingTheory/Localization/AtPrime/Extension.lean,Mathlib/RingTheory/Trace/Quotient.lean 3 2 ['github-actions', 'mathlib-merge-conflicts', 'wwylele'] nobody 1
4-80429
4 days ago
4-80430
4 days ago
4-53165
4 days
39202 FordUniver
author:FordUniver
 feat(Analysis/Calculus/Gradient): add toDual_gradient and companions Add `toDual_gradient`, `toDual_gradientWithin`, and the composed variants `toDual_comp_gradient`, `toDual_comp_gradientWithin` — the natural inverse direction of the gradient's defining equation `∇ f x := (toDual 𝕜 F).symm (fderiv 𝕜 f x)`. These identify `(toDual 𝕜 F) (∇ f x)` with `fderiv 𝕜 f x` (and the `gradientWithin` and composed forms with the corresponding fderiv versions), making the Riesz isomorphism between the two derivative views explicit. The proofs of `DifferentiableAt.hasGradientAt` and `DifferentiableWithinAt.hasGradientWithinAt` in the same file are simplified to use them. --- Came up while formalizing the descent lemma for Lipschitz-smooth functions, where being able to switch between `LipschitzWith K (fderiv ℝ f)` and `LipschitzWith K (∇ f)` is helpful, which with this PR becomes `toDual_comp_gradient ▸ (toDual ℝ F).isometry.lipschitzWith_iff K`. Also slightly simplifies two call sites in mathlib. maintainer-merge 20/5 Mathlib/Analysis/Calculus/Gradient/Basic.lean 1 5 ['FordUniver', 'Komyyy', 'github-actions'] nobody 1
4-79572
4 days ago
11-26932
11 days ago
11-26808
11 days
39183 yuanyi-350
author:yuanyi-350
 refactor(Analysis): golf `Mathlib/Analysis/Complex/Exponential` - shortens the reindexing step in `norm_exp_sub_sum_le_norm_mul_exp` by switching from `sum_bij` to `sum_Ico_eq_sum_range` with `simp` Extracted from #37968 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) codex t-analysis LLM-generated maintainer-merge 8/23 Mathlib/Analysis/Complex/Exponential.lean 1 4 ['Komyyy', 'github-actions', 'yuanyi-350'] urkud
assignee:urkud
 1
4-59488
4 days ago
4-59676
4 days ago
11-40996
11 days
37624 IvanRenison
author:IvanRenison
 feat(Combinatorics/SimpleGraph/Maps): add theorems about composition --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-combinatorics maintainer-merge 32/5 Mathlib/Combinatorics/SimpleGraph/Ends/Defs.lean,Mathlib/Combinatorics/SimpleGraph/Maps.lean 2 11 ['IvanRenison', 'YaelDillies', 'github-actions'] nobody 1
4-42819
4 days ago
6-11008
6 days ago
47-47514
47 days
36832 KryptosAI
author:KryptosAI
 chore(Data/Finset/Card): rename `pred_card_le_card_erase` to `sub_one_card_le_card_erase` ## Summary The name `pred_card_le_card_erase` suggests `Nat.pred` but the statement uses `- 1` (i.e., `Nat.sub 1`). Rename to `sub_one_card_le_card_erase` to match the actual statement. A deprecated alias is added for backwards compatibility. ### Files changed - `Mathlib/Data/Finset/Card.lean` — definition renamed + deprecated alias - `Mathlib/Data/Finset/Powerset.lean` — reference updated - `Mathlib/Combinatorics/Additive/SubsetSum.lean` — reference updated - `Mathlib/Algebra/Polynomial/EraseLead.lean` — reference updated Addresses the `Finset.pred_card_le_card_erase` item in #21584. ## AI disclosure I used Claude Code to explore the codebase (finding all references to rename) and to draft the PR description. I reviewed and understand all changes — these are straightforward renames with a deprecated alias. new-contributor awaiting-author 22/15 Mathlib/Algebra/Polynomial/EraseLead.lean,Mathlib/Combinatorics/Additive/SubsetSum.lean,Mathlib/Combinatorics/SetFamily/AhlswedeZhang.lean,Mathlib/Combinatorics/SetFamily/Shadow.lean,Mathlib/Data/Finset/Card.lean,Mathlib/Data/Finset/Powerset.lean,Mathlib/Data/Set/Card.lean,Mathlib/GroupTheory/Perm/Support.lean,Mathlib/RingTheory/Ideal/Operations.lean 9 8 ['KryptosAI', 'Multramate', 'dagurtomas', 'github-actions', 'mattrobball', 'ooovi'] nobody 1
4-34203
4 days ago
4-34203
4 days ago
59-48094
59 days
33928 jsm28
author:jsm28
 feat(Combinatorics/Tiling/TileSet): indexed families of tiles Define the type `TileSet` for indexed families of tiles (in a discrete context), and some associated definitions (including `symmetryGroup`) and API lemmas. `TileSet` can be used for tilings of the whole space; for tilings of part of the space; for patches of tiles (extracted from a tiling by considering tiles meeting some set of points, or considered on their own without extracting from a tiling); for multiple tilings (covering the space more than once). In particular, the fact that people study multiple tilings provides a clear justification for using indexed families rather than sets of tiles, and basic definitions and API lemmas generally work for all these different uses of `TileSet` (sometimes with weak constraints such as tiles being finite, nonempty and only having finitely many tiles meeting any point of the space). Definitions for saying e.g. "this `TileSet` is a tiling of the whole space" are to be included in subsequent files in subsequent PRs. From AperiodicMonotilesLean. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-combinatorics 460/0 Mathlib.lean,Mathlib/Combinatorics/Tiling/TileSet.lean 2 23 ['Parcly-Taxel', 'b-mehta', 'eric-wieser', 'github-actions', 'jsm28', 'vihdzp'] nobody 1
3-75786
3 days ago
129-6494
129 days ago
129-6206
129 days
37443 SnirBroshi
author:SnirBroshi
 feat(Combinatorics/SimpleGraph/Walk/Operations): permutations of support --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-combinatorics maintainer-merge 17/0 Mathlib/Combinatorics/SimpleGraph/Paths.lean,Mathlib/Combinatorics/SimpleGraph/Walk/Operations.lean 2 6 ['YaelDillies', 'github-actions', 'mathlib-merge-conflicts'] b-mehta
assignee:b-mehta
 1
3-74321
3 days ago
11-47179
11 days ago
51-32167
51 days
38866 j-mayoral
author:j-mayoral
 feat(PresentedGroup): free-product of presentations is isomorphic to the presentation of the union (over the disjoint union of generators) --- Adds the theorem that the free product of presentations is isomorphic to the presentation on the disjoint union of the generators with the union of the relations. That is, `<α | R₁> * <β | R₂> ≃* <α ⊕ β | iα(R₁) ∪ iβ(R₂)>`. Don't know if the current file is the best to add this result. I have the feeling this could be made more elegant, avoiding the need to state lemmas explicitly about the relations of the canonical maps, by instead working with relations on the free product of free groups and then studying how quotienting by relations behaves in terms of isomorphisms. However, that approach is less straightforward, so I prefer to keep the current PR as is and discuss possible refinements there to get better feedback (I’m new and still learning). [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor t-group-theory large-import maintainer-merge 65/5 Mathlib/Algebra/Group/Subgroup/Basic.lean,Mathlib/GroupTheory/PresentedGroup.lean 2 38 ['github-actions', 'j-mayoral', 'kbuzzard', 'tb65536'] tb65536
assignee:tb65536
 1
3-44429
3 days ago
3-45289
3 days ago
14-50529
14 days
39484 rosborn
author:rosborn
 refactor(GroupTheory/Torsion): make primaryComponent total Change `primaryComponent` to the `IsPGroup`-style `{g | ∃ k, g ^ p ^ k = 1}`, making the definitions total over `p : ℕ` without requiring `[Fact p.Prime]`. --- Needed to use `primaryComponent` under a binder where it can't synthesize `[Fact p.Prime]` (e.g., `⨆ p : (Nat.card G).primeFactors, primaryComponent G p.val` and similar family-shaped `iSup` / `Finset.prod` patterns). The new carrier agrees with the previous `{g | ∃ n, orderOf g = p^n}` on primes, so existing `[Fact p.Prime]` API is unaffected. Discussed on [Zulip](https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/.60.5BFact.20p.2EPrime.5D.60.20in.20.60CommGroup.2EprimaryComponent.60/with/595535434) t-group-theory maintainer-merge 89/64 Mathlib/GroupTheory/Torsion.lean 1 13 ['github-actions', 'rosborn', 'tb65536'] tb65536
assignee:tb65536
 1
3-40309
3 days ago
3-40297
3 days ago
5-8876
5 days
35216 kim-em
author:kim-em
 doc(Tactic/Translate/ToDual): add deployment guide for @[to_dual] This PR expands the documentation for `@[to_dual]` with practical advice for deploying it to existing code. **Module docstring** (`Mathlib/Tactic/Translate/ToDual.lean`): adds a "Deploying `@[to_dual]` to existing code" section covering name agreement, attribute propagation, docstring syntax ordering, declaration order dependencies, and known structural mismatches (conjunct reordering, type class gaps, interval argument swapping). **Attribute docstring**: adds a note that `@[simp]` is not auto-copied (must use `(attr := simp)`), and shows the correct ordering when combining `(attr := ...)` with docstrings. 🤖 Prepared with Claude Code --- @joneugster: this is no longer part of the PR, so I removed it from the description: > **Agent skill** (`.claude/skills/to_dual/SKILL.md`): detailed step-by-step instructions for an AI agent deploying `@[to_dual]`, including how to identify candidates, common patterns, and debugging. documentation LLM-generated maintainer-merge 31/3 Mathlib/Tactic/Translate/ToDual.lean 1 37 ['JovanGerb', 'MichaelStollBayreuth', 'faenuccio', 'github-actions', 'joneugster', 'kim-em', 'mathlib-merge-conflicts', 'vihdzp'] joneugster
assignee:joneugster
 1
3-35358
3 days ago
34-82130
34 days ago
41-68528
41 days
39552 themathqueen
author:themathqueen
 chore(RingTheory/Bialgebra/Hom): `toCoalgHom` as prefix for `simps` There are currently no generated `simps` lemmas for these, so this is a straightforward change. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-ring-theory maintainer-merge 1/1 Mathlib/RingTheory/Bialgebra/Hom.lean 1 2 ['YaelDillies', 'github-actions'] nobody 1
3-35056
3 days ago
4-3411
4 days ago
4-3487
4 days
38906 lua-vr
author:lua-vr
 feat(ConditionallyCompleteLattice/Indexed): add binary versions of lemmas Add binary versions of some of the lemmas. Those are useful when the domain is indexed over the members of a set. From the Carleson project. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-order carleson 21/5 Mathlib/Order/ConditionallyCompleteLattice/Indexed.lean 1 19 ['JovanGerb', 'SnirBroshi', 'github-actions', 'grunweg', 'lua-vr', 'mathlib-merge-conflicts'] nobody 1
3-27444
3 days ago
3-27509
3 days ago
13-1207
13 days
35619 SnirBroshi
author:SnirBroshi
 feat(Combinatorics/SimpleGraph/Clique): intersection and union of cliques Plus a couple of lemmas. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-combinatorics maintainer-merge 45/14 Mathlib/Combinatorics/SimpleGraph/Clique.lean,Mathlib/Combinatorics/SimpleGraph/Coloring/VertexColoring.lean,Mathlib/Data/Set/Pairwise/Basic.lean 3 13 ['SnirBroshi', 'YaelDillies', 'github-actions'] b-mehta
assignee:b-mehta
 1
2-74251
2 days ago
29-17141
29 days ago
50-79278
50 days
39556 b-mehta
author:b-mehta
 feat(Data/Finset): add InjOn variants of image_{subset,eq}_image_iff These are useful for set family combinatorics --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) easy t-data ready-to-merge merge-conflict 18/0 Mathlib/Data/Finset/Image.lean,Mathlib/Data/Finset/Powerset.lean 2 3 ['github-actions', 'mathlib-bors', 'mathlib-merge-conflicts', 'ocfnash'] nobody 1
2-70207
2 days ago
3-31479
3 days ago
0-50919
14 hours
39547 Hagb
author:Hagb
 chore(Order/Preorder/Finite): use `@[to_dual]` on lemmas about `{Min,Max}imal{For,}` Proofs of other theorems (e.g. in #39427) with dual theorems dependent on these lemmas would benefit from their duality. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-order 11/25 Mathlib/Order/Preorder/Finite.lean 1 4 ['Hagb', 'github-actions', 'vihdzp'] nobody 1
2-67464
2 days ago
4-7722
4 days ago
4-7434
4 days
37248 harahu
author:harahu
 doc(Tactic): avoid lazy continuation lines We resolve the ambiguity inherent in lazy (un-indented) list item continuation lines by either indenting them or separating them by inserting a newline in the cases where the item continuation was a mistake. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) documentation 123/114 Mathlib/Tactic/Algebraize.lean,Mathlib/Tactic/Basic.lean,Mathlib/Tactic/CategoryTheory/Coherence/PureCoherence.lean,Mathlib/Tactic/ComputeDegree.lean,Mathlib/Tactic/DepRewrite.lean,Mathlib/Tactic/Finiteness.lean,Mathlib/Tactic/FunProp.lean,Mathlib/Tactic/FunProp/Core.lean,Mathlib/Tactic/FunProp/Theorems.lean,Mathlib/Tactic/Linarith/Oracle/FourierMotzkin.lean,Mathlib/Tactic/Linter/FlexibleLinter.lean,Mathlib/Tactic/Order.lean,Mathlib/Tactic/SimpIntro.lean,Mathlib/Tactic/Simps/Basic.lean,Mathlib/Tactic/Widget/InteractiveUnfold.lean 15 4 ['Multramate', 'github-actions', 'grunweg', 'harahu', 'mathlib-merge-conflicts'] grunweg
assignee:grunweg
 1
2-51965
2 days ago
8-11656
8 days ago
56-18673
56 days
39332 Michaillus
author:Michaillus
 chore(Topology/Spectral): Added two small lemmas chore(Topology/Spectral): Added two lemmas `IsCompact.isClosed_constructibleTopology_of_isOpen` `IsCompact.isClosed_constructibleTopology_of_isClosed` --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-topology new-contributor 12/0 Mathlib/Topology/Spectral/ConstructibleTopology.lean 1 7 ['Michaillus', 'github-actions', 'plp127', 'qawbecrdtey'] PatrickMassot
assignee:PatrickMassot
 1
2-33835
2 days ago
9-1911
9 days ago
9-1623
9 days
39483 hawkrobe
author:hawkrobe
 feat(RingTheory): cocommutative bialgebra structure on SymmetricAlgebra Adds the cocommutative coalgebra and bialgebra structure on `SymmetricAlgebra R M` following`MonoidAlgebra` precedent. --- ~~I originally tried to use `Bialgebra.ofAlgHom` but it doesn't make `Coalgebra.comul` defeq for `RingQuot`-built carriers (it looks like the underlying instances were `@[no_expose]` in #32861). So I used explicit `instance ... where` field assignment, then `Bialgebra` via `mk'`, instead.~~ I used Claude Code to help audit/polish this PR. (I've lurked for a long time so I did my best to closely follow conventions of other SymmetricAlgebra files but felt nervous about trying to upstream something stupid!) t-ring-theory new-contributor maintainer-merge 66/0 Mathlib.lean,Mathlib/LinearAlgebra/SymmetricAlgebra/Basic.lean,Mathlib/RingTheory/Bialgebra/SymmetricAlgebra.lean 3 29 ['YaelDillies', 'YanYablonovskiy', 'github-actions', 'hawkrobe', 'wwylele'] nobody 2
2-32991
2 days ago
3-19092
3 days ago
5-75944
5 days
28613 espottesmith
author:espottesmith
 feat(Combinatorics): define undirected hypergraphs This PR defines undirected hypergraphs: ``` @[ext] structure Hypergraph (α : Type*) where /-- The vertex set -/ vertexSet : Set α /-- The hyperedge set -/ hyperedgeSet : Set (Set α) /-- All hyperedges must be subsets of the vertex set -/ hyperedge_isSubset_vertexSet : ∀ ⦃e⦄, e ∈ hyperedgeSet → e ⊆ vertexSet ``` In addition to the main definition, some additional definitions and related lemmas are provided: - vertex adjacency - hyperedge adjacency - vertex "stars" - special cases (loops, empty hypergraphs, trivial hypergraphs, complete hypergraphs, simple hypergraphs, k-uniform hypergraphs, and d-regular hypergraphs) - (some) hypergraph cardinality - subhypergraphs, induced subhypergraphs, and partial hypergraphs This implementation is certainly bare-bones. I'm submitting this PR at this point, rather than when my developments are more fleshed out, because there has been some interest in others contributing to hypergraph formalization in mathlib. In the near future, goals include: - defining incidence matrices (i.e., conversion from `Hypergraph α` to `Matrix α (Set α) β` - coersion/generalization of graph as 2-uniform hypergraph - conversion of a hypergraph into its associated clique graph/two-section graph - constructing the dual of a hypergraph (note: on first blush, this appears somewhat challenging, given that we define hyperedges as `Set α` rather than some other type `β`) - rank and co-rank - walks, paths, cycles, etc. on hypergraphs --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-combinatorics new-contributor 295/0 Mathlib.lean,Mathlib/Combinatorics/Hypergraph/Basic.lean 2 151 ['SnirBroshi', 'b-mehta', 'espottesmith', 'github-actions', 'jt496', 'lauramonk', 'mathlib4-merge-conflict-bot', 'tb65536'] b-mehta
assignee:b-mehta
 1
2-28145
2 days ago
2-30190
2 days ago
98-4494
98 days
37697 IvanRenison
author:IvanRenison
 feat(Combinatorics/SimpleGraph/Clique): add theorems about cliques and induced graphs --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-combinatorics awaiting-author 22/0 Mathlib/Combinatorics/SimpleGraph/Clique.lean 1 10 ['Rida-Hamadani', 'SnirBroshi', 'YaelDillies', 'github-actions'] YaelDillies
assignee:YaelDillies
 1
2-25292
2 days ago
2-25292
2 days ago
44-1357
44 days
39236 quantumsnow
author:quantumsnow
 feat(AlgebraicTopology): `HomologyPretheory` for Eilenberg-Steenrod homology This splits out a part of #38369 into a separate PR. It includes a structure `TopPair.HomologyPretheory` containing the data for an Eilenberg-Steenrod homology theory and the first Eilenberg-Steenrod axiom as a typeclass `EilenbergSteenrod.IsHomotopyInvariant`. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebraic-topology new-contributor maintainer-merge awaiting-author 155/0 Mathlib.lean,Mathlib/AlgebraicTopology/EilenbergSteenrod.lean 2 37 ['chrisflav', 'dagurtomas', 'github-actions', 'joelriou', 'quantumsnow'] robin-carlier
assignee:robin-carlier
 1
2-21401
2 days ago
2-21401
2 days ago
2-50409
2 days
37642 SnirBroshi
author:SnirBroshi
 chore(Combinatorics/SimpleGraph): tidy various files --- Concept inspired by @Ruben-VandeVelde :) [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-combinatorics maintainer-merge 74/62 Mathlib/Combinatorics/SimpleGraph/Coloring/VertexColoring.lean,Mathlib/Combinatorics/SimpleGraph/Copy.lean,Mathlib/Combinatorics/SimpleGraph/Extremal/Basic.lean,Mathlib/Combinatorics/SimpleGraph/IncMatrix.lean,Mathlib/Combinatorics/SimpleGraph/Maps.lean,Mathlib/Combinatorics/SimpleGraph/Trails.lean,Mathlib/Combinatorics/SimpleGraph/Walk/Decomp.lean,Mathlib/Combinatorics/SimpleGraph/Walk/Operations.lean,Mathlib/Combinatorics/SimpleGraph/Walk/Subwalks.lean 9 8 ['SnirBroshi', 'YaelDillies', 'github-actions'] nobody 1
2-17793
2 days ago
2-17869
2 days ago
47-16287
47 days
26975 Whysoserioushah
author:Whysoserioushah
 feat: a norm_num extension for complex numbers co-authored-by : @thefundamentaltheor3m, @hrmacbeth --- * depends on: #39628 * depends on: #39620 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-meta 444/14 Mathlib.lean,Mathlib/Analysis/RCLike/Basic.lean,Mathlib/Data/Complex/Basic.lean,Mathlib/Tactic.lean,Mathlib/Tactic/NormNum/Core.lean,Mathlib/Tactic/NormNum/Eq.lean,Mathlib/Tactic/NormNum/NormNumI.lean,Mathlib/Tactic/NormNum/OfScientific.lean,Mathlib/Tactic/NormNum/Result.lean,MathlibTest/norm_numI.lean 10 75 ['JovanGerb', 'Vierkantor', 'Whysoserioushah', 'dupuisf', 'eric-wieser', 'github-actions', 'grunweg', 'hrmacbeth', 'mathlib4-merge-conflict-bot'] eric-wieser
assignee:eric-wieser
 1
2-11552
2 days ago
2-10091
2 days ago
112-30556
112 days
39422 eric-wieser
author:eric-wieser
 feat: add congruence lemmas for (d)finsupp big operators Also adds the missing n-ary product lemmas to match the existing sum lemmas. Co-authored-by: Antoine Chambert-Loir --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra large-import maintainer-merge
label:t-algebra$
 166/1 Mathlib/Algebra/BigOperators/Finsupp/Basic.lean,Mathlib/Data/DFinsupp/BigOperators.lean,Mathlib/GroupTheory/Congruence/BigOperators.lean,Mathlib/RingTheory/Congruence/BigOperators.lean,Mathlib/RingTheory/TwoSidedIdeal/BigOperators.lean 5 19 ['AntoineChambert-Loir', 'YaelDillies', 'eric-wieser', 'github-actions'] nobody 2
2-2631
2 days ago
7-1468
7 days ago
7-13052
7 days
39487 ADedecker
author:ADedecker
 chore: switch `EqLocus` from `LinearMapClass` to `LinearMap` --- Note: this PR was opened at 35000 feet :slightly_smiling_face: [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra
label:t-algebra$
 18/14 Mathlib/Algebra/Algebra/Subalgebra/Basic.lean,Mathlib/Algebra/Module/Submodule/EqLocus.lean,Mathlib/Analysis/InnerProductSpace/MeanErgodic.lean,Mathlib/Topology/Algebra/Module/ContinuousLinearMap/Basic.lean 4 10 ['ADedecker', 'b-mehta', 'github-actions', 'j-loreaux', 'themathqueen'] nobody 1
2-1406
2 days ago
2-42946
2 days ago
5-14513
5 days
39623 justus-springer
author:justus-springer
 feat(Algebra/MvPolynomial/Basic): `coeff_C_of_ne_zero` and `coeff_add_single_C` These lemmas are multivariate analogs to `Polynomial.coeff_C_of_ne_zero`, `Polynomial.coeff_C_succ` and `PowerSeries.coeff_C_of_ne_zero` and `PowerSeries.coeff_succ_C`. They are useful for defining partial derivatives for multivariate power series, see PR #39626. - [x] depends on: #39632 --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-ring-theory 16/0 Mathlib/Algebra/MvPolynomial/Basic.lean,Mathlib/RingTheory/MvPowerSeries/Basic.lean 2 5 ['github-actions', 'justus-springer', 'mathlib-dependent-issues', 'wwylele'] nobody 1
1-83819
1 day ago
1-83935
1 day ago
2-12459
2 days
37752 JovanGerb
author:JovanGerb
 chore(Order/CompleteLattice/Lemmas): use `to_dual` Use `to_dual` for lemmas about `CompleteLattice`. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-order 27/56 Mathlib/Order/CompleteLattice/Lemmas.lean 1 1 ['github-actions', 'vihdzp'] nobody 1
1-75787
1 day ago
45-26227
45 days ago
45-25939
45 days
34805 DavidLedvinka
author:DavidLedvinka
 feat(Tactic): generalize ofScientific NormNum extension to `DivisionSemiring` Co-authored-by: @hrmacbeth t-meta 68/20 Mathlib/Tactic/NormNum/Inv.lean,Mathlib/Tactic/NormNum/OfScientific.lean,MathlibTest/norm_num.lean 3 26 ['DavidLedvinka', 'JovanGerb', 'b-mehta', 'eric-wieser', 'github-actions', 'mathlib-merge-conflicts', 'thorimur'] nobody 1
1-75786
1 day ago
62-6335
62 days ago
82-47459
82 days
37753 JovanGerb
author:JovanGerb
 chore(Order/Filter/Basic): use `to_dual` for `≤ᶠ` Use `to_dual` on lemmas about `EventuallyLE`. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-order 19/6 Mathlib/Order/Filter/Basic.lean 1 2 ['github-actions', 'vihdzp'] nobody 1
1-75786
1 day ago
45-26092
45 days ago
45-25804
45 days
39620 eric-wieser
author:eric-wieser
 feat: missing nnratCast lemmas for RCLike --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) easy t-analysis 10/3 Mathlib/Analysis/RCLike/Basic.lean 1 4 ['Whysoserioushah', 'eric-wieser', 'github-actions'] j-loreaux
assignee:j-loreaux
 1
1-74193
1 day ago
2-4929
2 days ago
2-4800
2 days
37521 jessealama
author:jessealama
 feat(Data/Part): add Part.bind_eq_some_iff Add `Part.bind_eq_some_iff`, the `Part` analogue of `Option.bind_eq_some_iff`. Noticed this small gap while working on some equivalence proofs with partial functions. t-data 6/0 Mathlib/Data/Part.lean 1 6 ['github-actions', 'jessealama', 'joneugster', 'vihdzp'] joneugster
assignee:joneugster
 1
1-73675
1 day ago
4-70248
4 days ago
47-26793
47 days
38483 jessealama
author:jessealama
 feat(Algebra/BigOperators): add `Antiperiodic.sum_Ico_shift` Three lemmas about `Finset` sums of `Function.Antiperiodic` functions: `sum_map_add_right` says that for `f` antiperiodic with antiperiod `c`, summing `f` over a `Finset` shifted by `c` (via `addRightEmbedding c`) negates the sum over the original; `sum_Ico_shift` is the half-open-interval specialization, immediate via `Finset.map_add_right_Ico`; and `sum_Ico_mul_add_sum_Ico_mul_shift_eq_zero` is a bilinear cancellation variant. Spun off from #29713 (Euler-Poincaré formula), where the bilinear form is used. t-algebra
label:t-algebra$
 63/0 Mathlib.lean,Mathlib/Algebra/BigOperators/Periodic.lean 2 5 ['github-actions', 'j-loreaux', 'jessealama', 'wwylele'] ocfnash
assignee:ocfnash
 1
1-73161
1 day ago
17-55388
17 days ago
27-28131
27 days
36376 jessealama
author:jessealama
 feat(SimpleGraph): hamiltonian cycle from cyclic permutation This PR provides `IsHamiltonian.of_perm`, a bridge from `Equiv.Perm.IsCycle` to `SimpleGraph.IsHamiltonian`: if σ is a permutation that is a single cycle with full support on at least 3 elements, and each step `v → σ v` is an edge of `G`, then `G` is Hamiltonian. ### New definitions and lemmas **`Mathlib/Data/List/Chain.lean`**: - `IsChain.iterate`: `List.iterate f a n` is a chain under `r` whenever `r a (f a)` holds for all `a` **`Mathlib/Data/List/Iterate.lean`**: - `getLast_iterate`: the last element of `List.iterate f a n` is `f^[n - 1] a` **`Mathlib/Combinatorics/SimpleGraph/Walk/Iterate.lean`** (new file): - `Walk.iterate`: builds a walk of length `n` from `x` to `f^[n] x` for any function `f` with `G.Adj x (f x)` for all `x`, defined via `Walk.ofSupport` - `Walk.length_iterate`, `Walk.support_iterate`, `Walk.edges_iterate`: basic API **`Mathlib/GroupTheory/Perm/Cycle/Basic.lean`**: - `IsCycleOn.injOn_pow_apply`: the map `n ↦ (f ^ n) a` is injective on `Finset.range #s` **`Mathlib/GroupTheory/Perm/Cycle/Concrete.lean`**: - `IsCycleOn.injOn_sym2_pow_apply`: the unordered-pair edge map `k ↦ s((f ^ k) a, (f ^ (k + 1)) a)` is injective on `[0, #s)` when `#s ≠ 2` - `IsCycleOn.sym2_pow_apply_ne`: edge distinctness for cycle-on permutations — `s((f ^ k) a, (f ^ (k + 1)) a) ≠ s(a, f a)` when `k ≠ 0`, `k < #s`, and `#s ≠ 2` - `Perm.toList_eq_range_map_pow`: expresses `toList` as a range map over powers **`Mathlib/Combinatorics/SimpleGraph/Hamiltonian.lean`**: - `cons_isHamiltonianCycle_iff`: a Hamiltonian path closed by an edge outside its support is a Hamiltonian cycle, and conversely - `IsHamiltonian.of_perm`: the main theorem --- - [x] depends on: #36307 t-combinatorics maintainer-merge 182/0 Mathlib.lean,Mathlib/Combinatorics/SimpleGraph/Hamiltonian.lean,Mathlib/Combinatorics/SimpleGraph/Hamiltonian/Perm.lean,Mathlib/Combinatorics/SimpleGraph/Walk/Iterate.lean,Mathlib/Data/List/Chain.lean,Mathlib/Data/List/Iterate.lean,Mathlib/GroupTheory/Perm/Cycle/Basic.lean,Mathlib/GroupTheory/Perm/Cycle/Concrete.lean 8 78 ['SnirBroshi', 'YaelDillies', 'github-actions', 'jessealama', 'mathlib-dependent-issues', 'mathlib-merge-conflicts'] nobody 1
1-70751
1 day ago
3-55580
3 days ago
47-75031
47 days
39604 qawbecrdtey
author:qawbecrdtey
 chore(GroupTheory/QuotientGroup/Basic): remove transitive import --- Removed transitive import `Mathlib.GroupTheory.Congruence.Hom`. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-group-theory easy maintainer-merge 0/1 Mathlib/GroupTheory/QuotientGroup/Basic.lean 1 2 ['github-actions', 'tb65536'] tb65536
assignee:tb65536
 1
1-50278
1 day ago
2-69625
2 days ago
2-69337
2 days
37495 IvanRenison
author:IvanRenison
 feat(Combinatorics/SimpleGraph/Sum): add homomorphism, embedding and isomorphism of sums --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-combinatorics maintainer-merge 58/2 Mathlib/Combinatorics/SimpleGraph/Sum.lean 1 19 ['IvanRenison', 'YaelDillies', 'github-actions', 'mkaratarakis'] nobody 1
1-47510
1 day ago
6-12854
6 days ago
45-38501
45 days
38362 vihdzp
author:vihdzp
 feat: cofinal subset of regular cardinal is isomorphic to it In set theory, one often identifies a cardinal `c` with its initial ordinal `c.ord`, and said ordinal with the lower set `Iio c.ord`. This is particularly pervasive in the theory of club and stationary subsets, where one often sees the hypothesis "let κ be a regular cardinal" in lieu of the more precise wording: that `κ` is an (infinite) well-order, whose order type equals the initial ordinal of its cardinality. We define a typeclass `IsRegularCardinalOrder` for this assumption. The benefit of using it is that our results won't apply only to `Iio c.ord` for regular `c`, but also to concrete types such as `Nat`, `Cardinal`, or `Ordinal`. As a proof of concept, we define `Order.enum`, a generalization of both `Nat.nth` and `Ordinal.enumOrd`. A future PR will deprecate the latter. --- - [x] depends on: #38363 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-set-theory maintainer-merge 127/11 Mathlib.lean,Mathlib/Order/BoundedOrder/Basic.lean,Mathlib/SetTheory/Cardinal/Aleph.lean,Mathlib/SetTheory/Cardinal/Cofinality/Enum.lean,Mathlib/SetTheory/Cardinal/Cofinality/Ordinal.lean 5 12 ['YaelDillies', 'github-actions', 'mathlib-dependent-issues', 'mathlib-merge-conflicts', 'vihdzp'] nobody 1
1-45171
1 day ago
7-45187
7 days ago
11-3444
11 days
39656 justus-springer
author:justus-springer
 feat(AlgebraicGeometry/Birational/RationalMap): add `RationalMap.representative` Split off from #39317 --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) maintainer-merge t-algebraic-geometry 14/0 Mathlib/AlgebraicGeometry/Birational/RationalMap.lean 1 2 ['chrisflav', 'github-actions'] nobody 1
1-33415
1 day ago
1-33923
1 day ago
1-33635
1 day
39561 SnirBroshi
author:SnirBroshi
 feat(Combinatorics/SimpleGraph/Operations): a graph is the supremum of edge graphs - `G = ⨆ e ∈ G.edgeSet, fromEdgeSet {e}` - `G = sSup { edge u v | (u : V) (v : V) (_ : G.Adj u v) }` and `edgeSet` & `fromEdgeSet` preserve sup & inf. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-combinatorics 51/0 Mathlib/Combinatorics/SimpleGraph/Basic.lean,Mathlib/Combinatorics/SimpleGraph/Operations.lean 2 2 ['b-mehta', 'github-actions'] nobody 1
1-32428
1 day ago
3-61164
3 days ago
3-60876
3 days
39317 justus-springer
author:justus-springer
 feat(AlgebraicGeometry/Birational): dominant rational maps Add a predicate `RationalMap.IsDominant` and add basic API. This is in preparation for defining composition of rational maps (see #39445). See also [stacks#01RR](https://stacks.math.columbia.edu/tag/01RR). - [x] depends on: #39316 - [ ] depends on: #39656 --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebraic-geometry blocked-by-other-PR 105/0 Mathlib.lean,Mathlib/AlgebraicGeometry/Birational/Dominant.lean,Mathlib/AlgebraicGeometry/Birational/RationalMap.lean 3 7 ['chrisflav', 'dagurtomas', 'github-actions', 'justus-springer', 'mathlib-dependent-issues'] chrisflav and dagurtomas
assignee:dagurtomas assignee:chrisflav
 1
1-32140
1 day ago
1-52541
1 day ago
7-40850
7 days
38466 Thmoas-Guan
author:Thmoas-Guan
 feat(ModuleCat): some lemmas for `Ext` over `ModuleCat` some lemmas for `Ext` over `ModuleCat` --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-ring-theory large-import 71/0 Mathlib.lean,Mathlib/Algebra/Category/ModuleCat/Basic.lean,Mathlib/Algebra/Category/ModuleCat/Ext/Basic.lean,Mathlib/RingTheory/Ideal/Maps.lean 4 14 ['Thmoas-Guan', 'chrisflav', 'github-actions', 'robin-carlier'] chrisflav
assignee:chrisflav
 1
1-22360
1 day ago
1-22360
1 day ago
27-5669
27 days
38319 Zetetic-Dhruv
author:Zetetic-Dhruv
 feat(Combinatorics/SetFamily): Assouad's dual VC bound Adds the Finset-level form of Assouad's 1983 dual VC bound: if a family `𝒜 : Finset (Finset α)` has VC dimension at most `d`, then for any ground set `X : Finset α` the dual family `{𝒜.filter (· ∋ x) : x ∈ X}` has VC dimension at most `2 ^ (d + 1) - 1`. New declarations (in `Finset` namespace): - `dualFamily 𝒜 X`: for each `x ∈ X`, the subfamily `{A ∈ 𝒜 | x ∈ A}` - `mem_dualFamily` (`@[simp]`): membership characterisation - `exists_shatters_of_dualFamily_shatters`: Assouad's bitstring-coding lemma - `vcDim_dualFamily_le`: the headline VC bound Proof by Assouad's classical bitstring-coding argument. Sits on top of `Finset.shatterer` / `Finset.vcDim` from `Mathlib.Combinatorics.SetFamily.Shatter`. References: - P. Assouad, Densite et dimension, Ann. Inst. Fourier 33(3) (1983), Thm 2.13 - J. Matousek, Lectures on Discrete Geometry, GTM 212, Springer, 2002, Section 10.3 Lemma 10.3.3 --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-combinatorics new-contributor 199/0 Mathlib.lean,Mathlib/Combinatorics/SetFamily/DualVC.lean,docs/references.bib 3 37 ['Shreyas4991', 'YaelDillies', 'Zetetic-Dhruv', 'github-actions'] nobody 1
1-19772
1 day ago
13-2005
13 days ago
29-48766
29 days
37189 Brian-Nugent
author:Brian-Nugent
 feat(AlgebraicGeometry): The pushforward of a quasi-coherent sheaf between affines is quasi-coherent To be more precise, we show that if `AlgebraicGeometry.Scheme.Modules.fromTildeΓ` is an isomorphism then the same holds for the pushforward. This will show that being quasicoherent is stable under pushforward for affine morphisms once it is shown that `AlgebraicGeometry.Scheme.Modules.fromTildeΓ` being an isomorphism is equivalent to being quasicoherent. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebraic-geometry maintainer-merge 215/6 Mathlib/Algebra/Category/ModuleCat/Localization.lean,Mathlib/Algebra/Category/ModuleCat/Sheaf.lean,Mathlib/Algebra/Category/ModuleCat/Sheaf/PushforwardContinuous.lean,Mathlib/Algebra/Module/LocalizedModule/Basic.lean,Mathlib/AlgebraicGeometry/Modules/Sheaf.lean,Mathlib/AlgebraicGeometry/Modules/Tilde.lean,Mathlib/Topology/Sheaves/SheafCondition/Sites.lean 7 49 ['Brian-Nugent', 'chrisflav', 'github-actions', 'joelriou'] adamtopaz and chrisflav
assignee:adamtopaz assignee:chrisflav
 1
1-18244
1 day ago
2-929
2 days ago
36-19919
36 days
39008 MichaelStollBayreuth
author:MichaelStollBayreuth
 feat(NumberTheory/NumberField/Completion/FinitePlace): add multiplicity lemmas This adds some more API for multiplicities of prime ideals in factorizations (and some more basic API lemmas, too), in preparation for a proof of the Northcott property for heights on number fields. We also extend the API for `HasFinite{Mul|}Support` a bit. --- - [x] depends on: #38654 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-number-theory large-import maintainer-merge 113/1 Mathlib/Algebra/FiniteSupport/Basic.lean,Mathlib/NumberTheory/NumberField/Completion/FinitePlace.lean,Mathlib/RingTheory/Algebraic/Integral.lean,Mathlib/RingTheory/DedekindDomain/Ideal/Lemmas.lean,Mathlib/RingTheory/UniqueFactorizationDomain/Multiplicity.lean 5 43 ['MichaelStollBayreuth', 'github-actions', 'mathlib-dependent-issues', 'tb65536'] tb65536
assignee:tb65536
 1
1-16337
1 day ago
2-31985
2 days ago
11-39333
11 days
34273 gasparattila
author:gasparattila
 feat(Topology/Sets): finite sets are dense in `(Nonempty)Compacts` --- - [x] depends on: #34266 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-topology 35/0 Mathlib/Topology/Sets/VietorisTopology.lean 1 4 ['github-actions', 'mathlib-dependent-issues', 'mathlib4-merge-conflict-bot', 'scholzhannah'] nobody 1
0-75788
21 hours ago
59-18763
59 days ago
59-19725
59 days
33355 0xTerencePrime
author:0xTerencePrime
 feat(Combinatorics/SimpleGraph/Connectivity): define vertex connectivity This PR introduces the foundations of vertex connectivity for simple graphs, providing a counterpart to the edge connectivity theory in #32870. ### Main definitions - `SimpleGraph.IsVertexReachable`: vertices remain reachable after removing strictly fewer than `k` other vertices. - `SimpleGraph.IsVertexConnected`: a graph is `k`-vertex-connected if its order is strictly greater than `k` and any two distinct vertices are `k`-vertex-reachable. Includes basic characterizations for $k=0$ and $k=1$, along with monotonicity lemmas (`anti` and `mono`). new-contributor t-combinatorics 216/0 Mathlib.lean,Mathlib/Combinatorics/SimpleGraph/Connectivity/VertexConnectivity.lean,Mathlib/Combinatorics/SimpleGraph/IsolateVerts.lean 3 149 ['0xTerencePrime', 'SnirBroshi', 'SproutSeeds', 'YaelDillies', 'github-actions', 'mathlib-merge-conflicts', 'vihdzp'] b-mehta
assignee:b-mehta
 1
0-74300
20 hours ago
19-37416
19 days ago
55-6530
55 days
39058 vihdzp
author:vihdzp
 chore: `IsBotZeroClass (Fin n)` We also deprecate a bunch of theorems that now follow from the typeclass. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) large-import t-order maintainer-merge 34/32 Archive/Imo/Imo2024Q5.lean,Mathlib/AlgebraicTopology/Quasicategory/Basic.lean,Mathlib/AlgebraicTopology/SimplexCategory/Basic.lean,Mathlib/AlgebraicTopology/SimplicialObject/Basic.lean,Mathlib/AlgebraicTopology/SimplicialSet/Basic.lean,Mathlib/Combinatorics/Additive/FreimanHom.lean,Mathlib/Data/Fin/SuccPred.lean,Mathlib/GroupTheory/Perm/Sign.lean,Mathlib/Logic/Equiv/Fin/Rotate.lean,Mathlib/Order/Fin/Basic.lean,Mathlib/Order/Grade.lean,Mathlib/Order/Interval/Set/Basic.lean,Mathlib/RingTheory/ChainOfDivisors.lean 13 20 ['Komyyy', 'github-actions', 'leanprover-radar', 'plp127', 'vihdzp'] nobody 1
0-71166
19 hours ago
3-35678
3 days ago
14-76988
14 days
34440 grunweg
author:grunweg
 feat: linter for name components in uppercase Per the naming convention, these are errors (unless they are an abbreviation). Mathlib has *many* violations at the moment: for this reason, we add this as an environment linter and automatically add all current exceptions. Once these have been fixed, converting to a syntax linter is desirable. Until then, track the number of such exceptions as technical debt. --- [Zulip discussion](https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/naming.20convention.20linter/with/570617527) Note to self: wait for CI, then do a final nolints update. and try to implement the follow-up soon [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-linter large-import awaiting-author please-adopt merge-conflict 1024/8 Mathlib/Tactic/Linter/Style.lean,MathlibTest/DoubleUnderscore.lean,MathlibTest/Lint.lean,MathlibTest/LintStyle.lean,scripts/nolints.json 5 29 ['Vierkantor', 'github-actions', 'grunweg', 'joneugster', 'mathlib-merge-conflicts'] nobody 1
0-45290
12 hours ago
93-47171
93 days ago
13-82065
13 days
39414 SnirBroshi
author:SnirBroshi
 chore(Data/Set/Card): make `s.ncard` the simpNF of `Fintype.card s` Untags `coe_fintypeCard : ↑(Fintype.card s) = s.encard` as `@[simp]`, and instead tags - `fintypeCard_eq_ncard : Fintype.card s = s.ncard` - `coe_ncard_eq_encard : ↑(s.ncard) = s.encard` Then untags `simp` lemmas which are no longer simpNF because of this change; simpNF versions of some of them will be introduced in future PRs. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-data 23/28 Mathlib/Combinatorics/SimpleGraph/Connectivity/EdgeConnectivity.lean,Mathlib/Combinatorics/SimpleGraph/Copy.lean,Mathlib/Combinatorics/SimpleGraph/Finite.lean,Mathlib/Combinatorics/SimpleGraph/IncMatrix.lean,Mathlib/Combinatorics/SimpleGraph/Matching.lean,Mathlib/Combinatorics/SimpleGraph/Subgraph.lean,Mathlib/Data/Fintype/Card.lean,Mathlib/Data/Set/Card.lean,Mathlib/Data/Set/Finite/Basic.lean,Mathlib/GroupTheory/ClassEquation.lean,Mathlib/LinearAlgebra/Matrix/GeneralLinearGroup/Card.lean,Mathlib/Order/Interval/Finset/Defs.lean 12 8 ['SnirBroshi', 'YaelDillies', 'b-mehta', 'github-actions'] Vierkantor
assignee:Vierkantor
 1
0-44612
12 hours ago
7-32101
7 days ago
7-31813
7 days
37577 SnirBroshi
author:SnirBroshi
 feat(Combinatorics/SimpleGraph/Walk): upgrade subset theorems to sublist/prefix/suffix Upgrades theorems about `p.support ⊆ q.support` / `p.darts ⊆ q.darts` / `p.edges ⊆ q.edges` to `List.IsInfix`/`List.IsSuffix`/`List.Sublist`, which imply the subset versions. Also adds `cycleBypass` sublist lemmas that were missing, and golfs `length_bypass_le` and `bypass_eq_self_of_length_le` using the new sublist theorems. Co-authored-by: Iván Renison <85908989+IvanRenison@users.noreply.github.com> --- Except for a couple of `cycleBypass` ones, I did not add such theorems where there was no subset theorem to begin with (e.g. `(p.take n).darts <+: p.darts`), as they are usually not worth stating since they're trivial and simp proves them. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-combinatorics maintainer-merge 112/81 Mathlib/Combinatorics/SimpleGraph/Acyclic.lean,Mathlib/Combinatorics/SimpleGraph/Paths.lean,Mathlib/Combinatorics/SimpleGraph/Walk/Basic.lean,Mathlib/Combinatorics/SimpleGraph/Walk/Decomp.lean,Mathlib/Combinatorics/SimpleGraph/Walk/Operations.lean 5 5 ['YaelDillies', 'b-mehta', 'github-actions'] nobody 2
0-43555
12 hours ago
10-28539
10 days ago
49-60628
49 days
39138 Thmoas-Guan
author:Thmoas-Guan
 refactor(Algebra/GeometricallyReduced): refactor `Algebra.IsGeometricallyReduced` Refactor `Algebra.IsGeometricallyReduced` to adapt to a general algebra over commutative ring. In the up-coming #39141, we prove that this definition makes the base change to any field reduced. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-ring-theory maintainer-merge 47/16 Mathlib/RingTheory/LocalRing/ResidueField/Ideal.lean,Mathlib/RingTheory/Nilpotent/GeometricallyReduced.lean 2 11 ['Thmoas-Guan', 'chrisflav', 'github-actions'] nobody 1
0-21517
5 hours ago
1-27794
1 day ago
12-10321
12 days
33506 Rida-Hamadani
author:Rida-Hamadani
 feat(SimpleGraph): construct a cycle of two distinct paths with same start and end Co-authored-by: Vlad Tsyrklevich Co-authored-by: Snir Broshi <26556598+SnirBroshi@users.noreply.github.com> --- - [x] depends on: #33249 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-combinatorics maintainer-merge 114/5 Mathlib/Combinatorics/SimpleGraph/Paths.lean,Mathlib/Combinatorics/SimpleGraph/Walk/Basic.lean,Mathlib/Combinatorics/SimpleGraph/Walk/Decomp.lean,Mathlib/Data/List/Basic.lean,Mathlib/Data/List/Nodup.lean 5 62 ['Rida-Hamadani', 'SnirBroshi', 'YaelDillies', 'github-actions', 'mathlib-dependent-issues', 'mathlib-merge-conflicts', 'mathlib4-merge-conflict-bot', 'vlad902'] nobody 2
0-20591
5 hours ago
0-54764
15 hours ago
31-35733
31 days
39652 sgouezel
author:sgouezel
 chore: cleanup Integral file --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-measure-probability delegated 85/143 Mathlib/MeasureTheory/Integral/Bochner/Basic.lean,Mathlib/MeasureTheory/Integral/DominatedConvergence.lean,Mathlib/MeasureTheory/Integral/Prod.lean,Mathlib/Probability/Kernel/Composition/IntegralCompProd.lean,Mathlib/Probability/Kernel/Disintegration/Density.lean 5 6 ['ADedecker', 'RaggedR', 'github-actions', 'mathlib-bors', 'sgouezel'] nobody 1
0-19031
5 hours ago
0-19474
5 hours ago
1-20112
1 day
39061 SnirBroshi
author:SnirBroshi
 feat(Combinatorics/SimpleGraph/Walk/Paths): a trail which isn't a path has a cycle subwalk - `p.IsPath ↔ ∀ (v : V) (w : G.Walk v v), w.IsSubwalk p → w.Nil` - `p.IsTrail → (p.IsPath ↔ ∀ (v : V) (w : G.Walk v v), w.IsSubwalk p → ¬w.IsCycle)` --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-combinatorics awaiting-author 28/0 Mathlib/Combinatorics/SimpleGraph/Paths.lean,Mathlib/Combinatorics/SimpleGraph/Walk/Decomp.lean 2 6 ['Rida-Hamadani', 'b-mehta', 'github-actions'] nobody 1
0-18457
5 hours ago
0-18457
5 hours ago
14-56805
14 days
39059 vihdzp
author:vihdzp
 feat: `IsBotOneClass (Associates M)` --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra large-import maintainer-merge
label:t-algebra$
 11/9 Mathlib/Algebra/GroupWithZero/Associated.lean,Mathlib/RingTheory/ChainOfDivisors.lean 2 2 ['YaelDillies', 'github-actions'] nobody 1
0-6543
1 hour ago
0-10797
2 hours ago
14-77691
14 days
38234 vihdzp
author:vihdzp
 chore: make `IsSuccLimit` a structure This lets us name the fields. Note that the `mk_iff` lemma overwrites a recently deprecated theorem. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-order maintainer-merge 40/33 Mathlib/Order/SuccPred/InitialSeg.lean,Mathlib/Order/SuccPred/Limit.lean 2 6 ['YaelDillies', 'github-actions', 'plp127'] nobody 1
0-6480
1 hour ago
13-50939
13 days ago
29-38938
29 days
39523 kim-em
author:kim-em
 feat(LinearAlgebra/Trace): trace-zero idempotent endomorphism over CharZero field is zero This PR adds `LinearMap.IsIdempotentElem.eq_zero_of_trace_eq_zero`: an idempotent endomorphism of a finite-dimensional vector space over a characteristic-zero field with vanishing trace is the zero map. The proof routes through `LinearMap.IsProj.trace` (already in this file) — for an idempotent `e`, the trace equals the rank of `range e`. Over a `CharZero` field, vanishing trace forces the rank to zero, hence `range e = ⊥` and `e = 0`. 🤖 Prepared with Claude Code t-algebra maintainer-merge awaiting-author
label:t-algebra$
 19/0 Mathlib/LinearAlgebra/Trace.lean 1 4 ['github-actions', 'jcommelin', 'themathqueen'] nobody 1
0-6323
1 hour ago
0-39281
10 hours ago
0-41747
11 hours
37718 SabrinaJewson
author:SabrinaJewson
 feat(Order): add conversions from `Std` order typeclasses to Mathlib ones `{Preorder, PartialOrder, LinearOrder}.ofStd` exist to facilitate convenient translation from `Std` order typeclasses to Mathlib ones. The design is modelled closely after [`Init.Data.Order.PackageFactories`](https://leanprover-community.github.io/mathlib4_docs/Init/Data/Order/PackageFactories.html) (`Std.PreorderPackage` is equivalent-ish to Mathlib’s `Preorder`, and same for partial and linear orders). The `OfStdArgs` types allow conveniently bundling a whole bunch of default arguments together in a way that allows one default argument set to `extends` another. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-order new-contributor maintainer-merge 391/0 Mathlib.lean,Mathlib/Order/Std.lean,MathlibTest/OrderOfStd.lean 3 9 ['SabrinaJewson', 'YaelDillies', 'github-actions'] YaelDillies
assignee:YaelDillies
 1
0-4495
1 hour ago
0-82691
22 hours ago
45-76745
45 days
39707 sorrachai
author:sorrachai
 chore(Data/Tree/Basic): Rename Tree to BinaryTree Rename `Tree` to `BinaryTree`. This frees up the name `Tree` to cover n-ary trees in future. We only deprecate the `def`s, and move the theorems without deprecation. new-contributor 145/63 Mathlib/Combinatorics/Enumerative/Catalan/Tree.lean,Mathlib/Combinatorics/Enumerative/DyckWord.lean,Mathlib/Data/Tree/Basic.lean,Mathlib/Data/Tree/Get.lean,Mathlib/Data/Tree/Traversable.lean,Mathlib/Tactic/CancelDenoms/Core.lean,docs/overview.yaml 7 28 ['eric-wieser', 'github-actions', 'sorrachai'] nobody 1
0-2613
43 minutes ago
0-2776
41 minutes ago
0-13404
3 hours

All open PRs

Number Author Title Description Labels +/- Modified files (first 100) 📝 💬 All users who commented or reviewed Assignee(s) Updated Last status change total time in review
14720 eric-wieser
author:eric-wieser
 refactor: change `CliffordAlgebra.lift` to use quadratic maps This works towards addressing a footnote on [page 152](https://eric-wieser.github.io/thesis/eric-wieser-thesis.pdf#page=164) of my thesis. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict WIP t-algebra
label:t-algebra$
 200/167 Mathlib/LinearAlgebra/CliffordAlgebra/Basic.lean,Mathlib/LinearAlgebra/CliffordAlgebra/Equivs.lean,Mathlib/LinearAlgebra/CliffordAlgebra/Prod.lean,Mathlib/LinearAlgebra/QuadraticForm/Complex.lean,Mathlib/LinearAlgebra/QuadraticForm/Dual.lean,Mathlib/LinearAlgebra/QuadraticForm/Isometry.lean,Mathlib/LinearAlgebra/QuadraticForm/IsometryEquiv.lean,Mathlib/LinearAlgebra/QuadraticForm/Prod.lean,Mathlib/LinearAlgebra/QuadraticForm/QuadraticModuleCat.lean,Mathlib/LinearAlgebra/QuadraticForm/Real.lean,Mathlib/LinearAlgebra/QuadraticForm/TensorProduct/Isometries.lean 11 1 ['github-actions'] nobody
660-49756
1 year ago
unknown
0-0
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14889 yuma-mizuno
author:yuma-mizuno
 feat(CategoryTheory/Bicategory/Monad): define monad in bicategory --- - [ ] depends on: #12107 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict WIP blocked-by-other-PR t-category-theory 1566/12 Mathlib.lean,Mathlib/CategoryTheory/Bicategory/Functor/Oplax.lean,Mathlib/CategoryTheory/Bicategory/LocallyDiscrete.lean,Mathlib/CategoryTheory/Bicategory/Monad/Adjunction.lean,Mathlib/CategoryTheory/Bicategory/Monad/Basic.lean,Mathlib/CategoryTheory/Bicategory/Monad/Cat.lean,Mathlib/CategoryTheory/Monad/Basic.lean,Mathlib/Tactic.lean,Mathlib/Tactic/CategoryTheory/Coherence.lean,Mathlib/Tactic/Widget/StringDiagram.lean,scripts/noshake.json,test/StringDiagram.lean,widget/src/penrose/monoidal.dsl,widget/src/penrose/monoidal.sty 14 2 ['github-actions', 'leanprover-community-mathlib4-bot'] nobody
660-49756
1 year ago
unknown
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13847 alreadydone
author:alreadydone
 feat(EllipticCurve): the universal elliptic curve + Define the universal Weierstrass curve (`Universal.curve`) over the polynomial ring `ℤ[A₁,A₂,A₃,A₄,A₆]`, and the universal pointed elliptic curve (`Universal.pointedCurve`) over the field of fractions (`Universal.Field`) of the universal ring `ℤ[A₁,A₂,A₃,A₄,A₆,X,Y]/⟨P⟩ = Universal.Poly/⟨P⟩` (`Universal.Ring`, where `P` is the Weierstrass polynomial) with distinguished point `(X,Y)`. + Given a Weierstrass curve `W` over a commutative ring `R`, we define the specialization homomorphism `W.specialize : ℤ[A₁,A₂,A₃,A₄,A₆] →+* R`. If `(x,y)` is a point on the affine plane, we define `W.polyEval x y : Universal.Poly →+* R`, which factors through `W.ringEval x y : Universal.Ring →+* R` if `(x,y)` is on `W`. + Introduce the cusp curve `Y² = X³`, on which lies the rational point `(1,1)`, with the nice property that `ψₙ(1,1) = n`, making it easy to prove nonvanishing of the universal `ψₙ` when `n ≠ 0` by specializing to the cusp curve, which shows that `(X,Y)` is a point of infinite order on the universal pointed elliptic curve. --- - [x] depends on: #13845 - [x] depends on: #12883 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict awaiting-author t-algebra t-algebraic-geometry
label:t-algebra$
 543/208 Mathlib.lean,Mathlib/Algebra/Polynomial/Bivariate.lean,Mathlib/AlgebraicGeometry/EllipticCurve/Affine.lean,Mathlib/AlgebraicGeometry/EllipticCurve/Group.lean,Mathlib/AlgebraicGeometry/EllipticCurve/Jacobian.lean,Mathlib/AlgebraicGeometry/EllipticCurve/Universal.lean 6 4 ['Multramate', 'alreadydone', 'github-actions', 'leanprover-community-mathlib4-bot'] nobody
660-49755
1 year ago
unknown
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0 seconds
14036 adomani
author:adomani
 Test/decl diff in lean --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict 465/1040 .github/workflows/Lean_decl_diff.yml,.github/workflows/bors.yml,.github/workflows/build.yml,.github/workflows/build.yml.in,.github/workflows/build_fork.yml,.github/workflows/mk_build_yml.sh,scripts/decls_diff_hybrid.sh,scripts/list_decls.lean 8 1 ['github-actions'] nobody
660-49755
1 year ago
unknown
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12952 adomani
author:adomani
 test: length statistics --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) WIP test-ci 124/0 .github/workflows/mathlib_stats.yml,.github/workflows/ml_stats_label.yaml,scripts/mathlib_stats.sh 3 9 ['github-actions'] nobody
660-49754
1 year ago
unknown
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13297 urkud
author:urkud
 feat(Semicontinuous): add `comp` lemma --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict awaiting-author t-topology t-order 31/13 Mathlib/Topology/Semicontinuous.lean 1 3 ['sgouezel', 'urkud'] nobody
660-49754
1 year ago
724-50452
724 days ago
0-18201
5 hours
13372 adomani
author:adomani
 dev: generic replacement --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict 446/0 Mathlib.lean,Mathlib/Tactic.lean,Mathlib/Tactic/Linter/ReplaceRefine.lean,Mathlib/Tactic/Replacements.lean 4 4 ['adomani', 'github-actions'] nobody
660-49754
1 year ago
unknown
0-0
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13512 adomani
author:adomani
 test: count all --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict 85/0 Mathlib.lean,Mathlib/Tactic.lean,Mathlib/Tactic/Linter.lean,Mathlib/Tactic/Linter/Tally.lean 4 0 [] nobody
660-49754
1 year ago
unknown
0-0
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12416 adomani
author:adomani
 chore: remove some cdots --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict 3830/3239 Archive/Imo/Imo1972Q5.lean,Archive/Imo/Imo2006Q5.lean,Archive/Imo/Imo2008Q2.lean,Archive/Imo/Imo2021Q1.lean,Archive/Wiedijk100Theorems/AbelRuffini.lean,Archive/Wiedijk100Theorems/BallotProblem.lean,Archive/Wiedijk100Theorems/BirthdayProblem.lean,Archive/Wiedijk100Theorems/BuffonsNeedle.lean,Archive/Wiedijk100Theorems/CubingACube.lean,Archive/Wiedijk100Theorems/FriendshipGraphs.lean,Archive/Wiedijk100Theorems/Partition.lean,Counterexamples/Cyclotomic105.lean,Counterexamples/DirectSumIsInternal.lean,Mathlib.lean,Mathlib/Algebra/Algebra/Spectrum.lean,Mathlib/Algebra/BigOperators/Finprod.lean,Mathlib/Algebra/BigOperators/List/Basic.lean,Mathlib/Algebra/Category/GroupCat/Colimits.lean,Mathlib/Algebra/Category/ModuleCat/Images.lean,Mathlib/Algebra/Category/Ring/Constructions.lean,Mathlib/Algebra/CharP/Quotient.lean,Mathlib/Algebra/ContinuedFractions/Computation/Approximations.lean,Mathlib/Algebra/DirectLimit.lean,Mathlib/Algebra/DirectSum/Internal.lean,Mathlib/Algebra/GCDMonoid/Finset.lean,Mathlib/Algebra/GeomSum.lean,Mathlib/Algebra/Group/UniqueProds.lean,Mathlib/Algebra/GroupPower/Order.lean,Mathlib/Algebra/GroupWithZero/WithZero.lean,Mathlib/Algebra/Homology/Exact.lean,Mathlib/Algebra/Homology/HomotopyCategory/HomComplex.lean,Mathlib/Algebra/Homology/HomotopyCategory/Triangulated.lean,Mathlib/Algebra/Homology/LocalCohomology.lean,Mathlib/Algebra/Homology/TotalComplex.lean,Mathlib/Algebra/Lie/DirectSum.lean,Mathlib/Algebra/Lie/IdealOperations.lean,Mathlib/Algebra/Lie/Nilpotent.lean,Mathlib/Algebra/Lie/Weights/Basic.lean,Mathlib/Algebra/Module/DedekindDomain.lean,Mathlib/Algebra/Module/LinearMap/End.lean,Mathlib/Algebra/Module/LocalizedModule.lean,Mathlib/Algebra/Module/PID.lean,Mathlib/Algebra/Module/Submodule/Bilinear.lean,Mathlib/Algebra/Module/Torsion.lean,Mathlib/Algebra/Module/Zlattice/Basic.lean,Mathlib/Algebra/MonoidAlgebra/Basic.lean,Mathlib/Algebra/MonoidAlgebra/Degree.lean,Mathlib/Algebra/MonoidAlgebra/Ideal.lean,Mathlib/Algebra/MvPolynomial/Variables.lean,Mathlib/Algebra/Order/Archimedean.lean,Mathlib/Algebra/Order/BigOperators/Group/List.lean,Mathlib/Algebra/Order/CauSeq/BigOperators.lean,Mathlib/Algebra/Order/CompleteField.lean,Mathlib/Algebra/Order/Field/Basic.lean,Mathlib/Algebra/Order/Group/Abs.lean,Mathlib/Algebra/Order/Group/Int.lean,Mathlib/Algebra/Order/Group/MinMax.lean,Mathlib/Algebra/Order/Interval/Basic.lean,Mathlib/Algebra/Order/Pointwise.lean,Mathlib/Algebra/Order/Sub/Defs.lean,Mathlib/Algebra/Polynomial/BigOperators.lean,Mathlib/Algebra/Polynomial/Degree/Definitions.lean,Mathlib/Algebra/Polynomial/Derivative.lean,Mathlib/Algebra/Polynomial/Div.lean,Mathlib/Algebra/Polynomial/FieldDivision.lean,Mathlib/Algebra/Polynomial/Module/Basic.lean,Mathlib/Algebra/Polynomial/PartialFractions.lean,Mathlib/Algebra/Polynomial/Reverse.lean,Mathlib/Algebra/Polynomial/RingDivision.lean,Mathlib/Algebra/Polynomial/UnitTrinomial.lean,Mathlib/Algebra/Quandle.lean,Mathlib/Algebra/Quaternion.lean,Mathlib/AlgebraicGeometry/AffineScheme.lean,Mathlib/AlgebraicGeometry/EllipticCurve/Affine.lean,Mathlib/AlgebraicGeometry/FunctionField.lean,Mathlib/AlgebraicGeometry/Gluing.lean,Mathlib/AlgebraicGeometry/Morphisms/Basic.lean,Mathlib/AlgebraicGeometry/Morphisms/QuasiCompact.lean,Mathlib/AlgebraicGeometry/Morphisms/QuasiSeparated.lean,Mathlib/AlgebraicGeometry/Morphisms/RingHomProperties.lean,Mathlib/AlgebraicGeometry/OpenImmersion.lean,Mathlib/AlgebraicGeometry/ProjectiveSpectrum/Scheme.lean,Mathlib/AlgebraicGeometry/Properties.lean,Mathlib/AlgebraicGeometry/Pullbacks.lean,Mathlib/AlgebraicGeometry/StructureSheaf.lean,Mathlib/AlgebraicTopology/SimplexCategory.lean,Mathlib/AlgebraicTopology/SplitSimplicialObject.lean,Mathlib/Analysis/Analytic/Composition.lean,Mathlib/Analysis/Analytic/IsolatedZeros.lean,Mathlib/Analysis/BoundedVariation.lean,Mathlib/Analysis/BoxIntegral/Box/Basic.lean,Mathlib/Analysis/BoxIntegral/Partition/Basic.lean,Mathlib/Analysis/Calculus/ContDiff/Basic.lean,Mathlib/Analysis/Calculus/Deriv/Slope.lean,Mathlib/Analysis/Calculus/FDeriv/Basic.lean,Mathlib/Analysis/Calculus/FDeriv/Extend.lean,Mathlib/Analysis/Calculus/InverseFunctionTheorem/ApproximatesLinearOn.lean,Mathlib/Analysis/Calculus/LocalExtr/Basic.lean,Mathlib/Analysis/Calculus/ParametricIntegral.lean,Mathlib/Analysis/Calculus/TangentCone.lean 608 0 [] nobody
660-49753
1 year ago
unknown
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12465 rosborn
author:rosborn
 style: Change Subtype.val to (↑) --- This is a test to see replacing `Subtype.val` with `(↑)` where appropriate. After performing the rewrite, some of the types subtly changed in a difficult to detect manner. Before the change, `openEmbedding' _` had type `OpenEmbedding Subtype.val` where `Subtype.val` expanded as `@Subtype.val α fun x ↦ x ∈ U : ↥U → α`. After the change, `Subtype.val` expands to `@Subtype.val α fun x ↦ x ∈ ↑U : { x // x ∈ ↑U } → α`. This caused some later proofs to fail due to the different definition. In a similar case, within the proof of `mfderiv_coe_sphere_injective` on line 553 `Subtype.val` expanded as `@Subtype.val E fun x ↦ x ∈ (Submodule.span ℝ {↑(-v)})ᗮ : ↥(Submodule.span ℝ {↑(-v)})ᗮ → E`. After changing to `(↑)`, it expanded to `@Subtype.val E fun x ↦ x ∈ ↑(Submodule.span ℝ {↑(-v)})ᗮ : { x // x ∈ ↑(Submodule.span ℝ {↑(-v)})ᗮ } → E`. One benefit to using `(↑)` was that it lead to a shorter proof as `ContinuousLinearEquiv.coe_coe` could be removed on line 559. In general, this subtle change in types is basically impossible to detect without a tool like leaff. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict 50/50 Mathlib/Analysis/InnerProductSpace/Basic.lean,Mathlib/Analysis/Normed/Group/Hom.lean,Mathlib/CategoryTheory/Generator.lean,Mathlib/CategoryTheory/Limits/Shapes/Types.lean,Mathlib/CategoryTheory/Subobject/Types.lean,Mathlib/Data/Fin/Basic.lean,Mathlib/Data/Set/Function.lean,Mathlib/Data/Set/Image.lean,Mathlib/Data/Setoid/Basic.lean,Mathlib/Geometry/Manifold/ContMDiff/Basic.lean,Mathlib/Geometry/Manifold/Instances/Sphere.lean,Mathlib/Geometry/Manifold/LocalInvariantProperties.lean,Mathlib/GroupTheory/Subsemigroup/Operations.lean,Mathlib/LinearAlgebra/LinearIndependent.lean,Mathlib/Order/Directed.lean,Mathlib/Order/RelIso/Basic.lean,Mathlib/Order/RelIso/Set.lean,Mathlib/RingTheory/Artinian.lean,Mathlib/SetTheory/Cardinal/Cofinality.lean,Mathlib/SetTheory/Game/Basic.lean,Mathlib/SetTheory/Game/PGame.lean,Mathlib/SetTheory/Surreal/Basic.lean,Mathlib/Topology/Bornology/Constructions.lean,Mathlib/Topology/EMetricSpace/Lipschitz.lean,Mathlib/Topology/Germ.lean,Mathlib/Topology/UniformSpace/Basic.lean,Mathlib/Topology/UniformSpace/UniformConvergenceTopology.lean,Mathlib/Topology/UniformSpace/UniformEmbedding.lean 28 1 ['eric-wieser', 'rosborn'] nobody
660-49753
1 year ago
unknown
0-0
0 seconds
12473 adomani
author:adomani
 first translations --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict 424/265 Mathlib.lean,Mathlib/Order/Lattice.lean,Mathlib/Order/WithBot.lean,Mathlib/Tactic.lean,Mathlib/Tactic/MinMax.lean 5 0 [] nobody
660-49753
1 year ago
unknown
0-0
0 seconds
12528 adomani
author:adomani
 test: autotranslations Bot --> Top --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict 350/294 Mathlib.lean,Mathlib/Order/WithBot.lean,Mathlib/Tactic.lean,Mathlib/Tactic/MinMax.lean,test/MinMax.lean 5 0 [] nobody
660-49753
1 year ago
752-85191
752 days ago
0-4
4 seconds
12588 adomani
author:adomani
 remove trailingDegree --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict 1280/979 Mathlib.lean,Mathlib/Algebra/MonoidAlgebra/Basic.lean,Mathlib/Algebra/Polynomial/Degree/Definitions.lean,Mathlib/Algebra/Polynomial/Degree/TrailingDegree.lean,Mathlib/Algebra/Polynomial/Div.lean,Mathlib/Algebra/Polynomial/Mirror.lean,Mathlib/Order/WithBot.lean,Mathlib/Tactic.lean,Mathlib/Tactic/MinMax.lean,Mathlib/Tactic/MinMaxTwo.lean,test/MinMax.lean 11 0 [] nobody
660-49753
1 year ago
unknown
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12608 eric-wieser
author:eric-wieser
 feat: allow `nsmul` / `zsmul` to be omitted again, with a warning --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict awaiting-author t-algebra t-meta
label:t-algebra$
 118/2 Mathlib.lean,Mathlib/Algebra/Group/Defs.lean,Mathlib/Tactic.lean,Mathlib/Tactic/DefaultFieldLinter.lean,scripts/noshake.json,test/default_field_linter.lean 6 12 ['YaelDillies', 'eric-wieser', 'fpvandoorn', 'github-actions'] nobody
660-49753
1 year ago
749-82172
749 days ago
0-84
1 minute
12637 adomani
author:adomani
 translation: MonoidAlgebra to AddMonoidAlgebra [Zulip discussion](https://leanprover.zulipchat.com/#narrow/stream/287929-mathlib4/topic/merge.20Add-MonoidAlgebra) * #12646 was found as a consequence of unification. * #12659 the typo `single 1 1` for `single 0 1`. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-algebra t-meta
label:t-algebra$
 615/986 Mathlib.lean,Mathlib/Algebra/MonoidAlgebra/Basic.lean,Mathlib/Algebra/MonoidAlgebra/Division.lean,Mathlib/Algebra/MvPolynomial/Basic.lean,Mathlib/Tactic.lean,Mathlib/Tactic/MinMaxTwo.lean,scripts/noshake.json 7 0 [] nobody
660-49753
1 year ago
unknown
0-0
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12679 MichaelStollBayreuth
author:MichaelStollBayreuth
 perf(NumberTheory/RamificationInertia): speed up slow file A repetition of the earlier experiment at [#12412](https://github.com/leanprover-community/mathlib4/pull/12412) with Lean 4.8.0-rc1. This time, I tried not to introduce local instances if possible, but instead to tweak instance priorities. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict WIP 57/14 Mathlib/NumberTheory/RamificationInertia.lean 1 3 ['MichaelStollBayreuth', 'github-actions', 'leanprover-bot'] nobody
660-49753
1 year ago
unknown
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12984 adomani
author:adomani
 Adomani/periodic reports dev custom action --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) WIP test-ci 366/0 .github/workflows/mathlib_stats.yml,.github/workflows/ml_stats_label.yaml,scripts/count_decls.lean,scripts/mathlib_stats.sh 4 69 ['github-actions'] nobody
660-49753
1 year ago
unknown
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13057 alreadydone
author:alreadydone
 feat(NumberTheory): characterize elliptic divisibility sequences Main results: + Every `normEDS` is an elliptic divisibility sequence (EDS). The key proof is `rel₄_of_anti_oddRec_evenRec`, based on my original argument first published on [MathSE](https://math.stackexchange.com/a/4903422/12932) + Conversely, every EDS is equal to some `normEDS` (assuming that the first two terms are not zero divisors) --- - [ ] depends on: #13155 - [x] depends on: #13153 - [x] depends on: #10843 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-algebra t-number-theory blocked-by-other-PR
label:t-algebra$
 1032/55 Mathlib/Algebra/Ring/NegOnePow.lean,Mathlib/Data/Int/Defs.lean,Mathlib/Data/Int/Parity.lean,Mathlib/GroupTheory/Perm/Sign.lean,Mathlib/NumberTheory/EllipticDivisibilitySequence.lean 5 6 ['Multramate', 'alreadydone', 'kbuzzard', 'leanprover-community-mathlib4-bot'] nobody
660-49753
1 year ago
728-74181
728 days ago
0-34672
9 hours
12192 Ruben-VandeVelde
author:Ruben-VandeVelde
 feat: generalize isLittleO_const_id_atTop/atBot From PNT+. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict awaiting-author t-analysis 10/4 Mathlib/Analysis/Asymptotics/Asymptotics.lean 1 6 ['Ruben-VandeVelde', 'llllvvuu', 'urkud'] nobody
660-49752
1 year ago
764-71848
764 days ago
1-21749
1 day
10024 ADedecker
author:ADedecker
 feat: rename `connectedComponentOfOne` to `identityComponent`, prove that it is normal and open --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-topology awaiting-CI 58/24 Mathlib/FieldTheory/AbsoluteGaloisGroup.lean,Mathlib/Topology/Algebra/Group/Basic.lean,Mathlib/Topology/Algebra/Group/TopologicalAbelianization.lean,Mathlib/Topology/Algebra/OpenSubgroup.lean,Mathlib/Topology/Connected/Basic.lean 5 0 [] nobody
660-49751
1 year ago
847-41875
847 days ago
0-832
13 minutes
10521 eric-wieser
author:eric-wieser
 chore: generalize `IsBoundedLinearMap` to modules Most of the lemmas don't actually need the normed on the scalars at all. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict awaiting-author t-analysis 58/42 Mathlib/Analysis/NormedSpace/BoundedLinearMaps.lean 1 3 ['github-actions', 'j-loreaux', 'urkud'] nobody
660-49751
1 year ago
827-17801
827 days ago
1-29105
1 day
10721 urkud
author:urkud
 feat(Order/FunLike): define `PointwiseLE` - introduce a mixin class `DFunLike.PointwiseLE`, use it to define `DFunLike.instPartialOrder`; - add a generic `DFunLike.orderEmbeddingCoe` - add `DFunLike.PointwiseLE` instances here and there. With this refactor and #13022, I'm going to generalize lemmas like `MeasureTheory.ae_mono` to `OuterMeasureClass`. --- - [x] depends on: #12983 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-order t-logic 123/50 Mathlib.lean,Mathlib/Algebra/Order/Hom/Ring.lean,Mathlib/Data/DFinsupp/Order.lean,Mathlib/Data/Finsupp/Order.lean,Mathlib/Data/FunLike/Basic.lean,Mathlib/Dynamics/Circle/RotationNumber/TranslationNumber.lean,Mathlib/GroupTheory/Congruence.lean,Mathlib/Order/FunLike.lean,Mathlib/Order/Heyting/Hom.lean,Mathlib/Order/Hom/Basic.lean,Mathlib/Order/Hom/Bounded.lean,Mathlib/Order/Hom/CompleteLattice.lean,Mathlib/Topology/Order/Hom/Basic.lean 13 48 ['YaelDillies', 'dupuisf', 'leanprover-community-mathlib4-bot', 'urkud'] nobody
660-49751
1 year ago
710-28153
710 days ago
64-12984
64 days
10845 Shamrock-Frost
author:Shamrock-Frost
 Refactor: Make MonoidalFunctor carry the data of an inverse We change the definition of a strong monoidal functor from a lax monoidal functor for which the unitor and tensorator are `IsIso` to a lax monoidal functor with the data of inverses for the unitor and tensorator. This requires fixing a lot of knock on effects. --- This is a **draft PR**. I would like to talk with people on zulip before merging it, and plan ahead to when we have oplax/colax monoidal functors as well. I'm not sure the approach I took here where `MonoidalFunctor` inherits from `LaxMonoidalFunctor` is a good choice if we want to be lax/oplax symmetric. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict WIP RFC t-category-theory 3799/1589 Mathlib/Algebra/Category/ModuleCat/Adjunctions.lean,Mathlib/Algebra/Homology/HomotopyCategory/DegreewiseSplit.lean,Mathlib/CategoryTheory/Adjunction/Basic.lean,Mathlib/CategoryTheory/Adjunction/Mates.lean,Mathlib/CategoryTheory/Adjunction/Opposites.lean,Mathlib/CategoryTheory/Adjunction/Prod.lean,Mathlib/CategoryTheory/Adjunction/Whiskering.lean,Mathlib/CategoryTheory/Bicategory/End.lean,Mathlib/CategoryTheory/Bicategory/SingleObj.lean,Mathlib/CategoryTheory/CatCommSq.lean,Mathlib/CategoryTheory/CatSquares.lean,Mathlib/CategoryTheory/Enriched/Basic.lean,Mathlib/CategoryTheory/Equivalence.lean,Mathlib/CategoryTheory/Iso.lean,Mathlib/CategoryTheory/Monoidal/Adjunction.lean,Mathlib/CategoryTheory/Monoidal/Braided.lean,Mathlib/CategoryTheory/Monoidal/Category.lean,Mathlib/CategoryTheory/Monoidal/Center.lean,Mathlib/CategoryTheory/Monoidal/CommMon_.lean,Mathlib/CategoryTheory/Monoidal/Discrete.lean,Mathlib/CategoryTheory/Monoidal/End.lean,Mathlib/CategoryTheory/Monoidal/Free/Basic.lean,Mathlib/CategoryTheory/Monoidal/Functor.lean,Mathlib/CategoryTheory/Monoidal/Limits.lean,Mathlib/CategoryTheory/Monoidal/Mon_.lean,Mathlib/CategoryTheory/Monoidal/NaturalTransformation.lean,Mathlib/CategoryTheory/Monoidal/Opposite.lean,Mathlib/CategoryTheory/Monoidal/Rigid/FunctorCategory.lean,Mathlib/CategoryTheory/Monoidal/Rigid/OfEquivalence.lean,Mathlib/CategoryTheory/Monoidal/Subcategory.lean,Mathlib/CategoryTheory/Monoidal/Transport.lean,Mathlib/CategoryTheory/Monoidal/Types/Basic.lean,Mathlib/CategoryTheory/Opposites.lean,Mathlib/CategoryTheory/Products/Associator.lean,Mathlib/CategoryTheory/Products/Basic.lean,Mathlib/CategoryTheory/Shift/Basic.lean,Mathlib/CategoryTheory/Shift/Pullback.lean,Mathlib/CategoryTheory/Whiskering.lean,Mathlib/RepresentationTheory/Action/Monoidal.lean,Mathlib/RepresentationTheory/GroupCohomology/Resolution.lean,Mathlib/RepresentationTheory/Rep.lean 41 7 ['Shamrock-Frost', 'joelriou'] nobody
660-49751
1 year ago
unknown
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11100 eric-wieser
author:eric-wieser
 feat(CategoryTheory/Limits): add `Functor.mapBinaryBiconeInv` --- - [ ] depends on: #11130 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) It's tempting to try to prove something like ```lean theorem Functor.mapBinaryBiconeInv_toCone [Limits.HasZeroMorphisms C] [Limits.HasZeroMorphisms D] (e : D ⥤ C) [IsEquivalence e] {X Y : D} (b : BinaryBicone (e.obj X) (e.obj Y)) : (e.mapBinaryBiconeInv b).toCone = (e.mapConeInv <| (Cones.postcompose (pairComp X Y e).symm.hom).obj b.toCone) := by simp sorry theorem Functor.mapBinaryBiconeInv_toCocone [Limits.HasZeroMorphisms C] [Limits.HasZeroMorphisms D] (e : D ⥤ C) [IsEquivalence e] {X Y : D} (b : BinaryBicone (e.obj X) (e.obj Y)) : (e.mapBinaryBiconeInv b).toCocone = (e.mapCoconeInv <| (Cocones.precompose (pairComp X Y e).hom).obj b.toCocone) := by sorry ``` but maybe equality is evil here merge-conflict t-category-theory awaiting-CI 52/0 Mathlib/CategoryTheory/Adjunction/Basic.lean,Mathlib/CategoryTheory/Equivalence.lean,Mathlib/CategoryTheory/Limits/Preserves/Shapes/Biproducts.lean 3 6 ['TwoFX', 'eric-wieser', 'leanprover-community-mathlib4-bot'] nobody
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1 year ago
unknown
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8503 thorimur
author:thorimur
 feat: meta utils for `refine?` This PR introduces some metaprogramming infrastructure and utilities that are necessary for `refine?` (#8364). * `elabTermWithHoles'` (and `withCollectingNewGoalsFrom'`): a more configurable version of `elabTermWithHoles`, which allows: preserving the initial mvar type; *not* tagging untagged goals; and postponing mvars. * Some `Syntax` and `TSyntax` functionality, including: * `TSyntax.map`(`M`), for acting on `TSyntax` with functions `f : Syntax -> (m) Syntax` * Range operations: `includes` and `isEqByRange` * `setTrailingInfoBy?` and `unsetOriginalTrailing`, which is like `unsetTrailing`, but behaves as expected. * `Term.withoutModifyingState`, which does not allow unknown mvarIds to escape via the infotree * `hasNewErrors`, which runs a monad computation and returns the value along with `true` or `false` depending on whether new error messages have been logged * the option `pp.anonymousMVarSuffixes`, which can be set to `false` to replace all numeric suffixes of anonymous mvars with `✝`, which is useful in tandem with `#guard_msgs` for tests (but is essentially a workaround—although it can make some tactic states more legible). --- I'm open to suggestions on the location and name of the option/delaborator used for trimming the numeric suffixes of anonymous mvar names (which is used in the tests)—including whether or not it should exist in the first place, as it's essentially just a workaround. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict awaiting-author t-meta 312/5 Mathlib.lean,Mathlib/Lean/CoreM.lean,Mathlib/Lean/Elab/Tactic/ElabTerm.lean,Mathlib/Lean/Elab/Term.lean,Mathlib/Util/Delaborators.lean,Mathlib/Util/Syntax.lean 6 2 ['kmill', 'thorimur'] kmill
assignee:kmill
660-49750
1 year ago
877-22074
877 days ago
38-46649
38 days
8519 eric-wieser
author:eric-wieser
 refactor(LinearAlgebra/TensorProduct): golf using `liftAddHom` This new `TensorProduct.liftAddHom` doesn't require bilinearity, only that scalar multiplication can be moved between the arguments. While in theory we only need the `AddMonoidHom` version as it offers exactly the same generality, we first provide an unbundled `liftFun` as this seems to give a sizeable performance boost if used in downstream `lift` variants. --- - [x] depends on: #8571 - [x] depends on: #8584 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict awaiting-author t-algebra
label:t-algebra$
 53/50 Mathlib/Algebra/Category/AlgebraCat/Monoidal.lean,Mathlib/LinearAlgebra/TensorProduct.lean,Mathlib/LinearAlgebra/TensorProduct/Tower.lean 3 28 ['bustercopley', 'eric-wieser', 'jcommelin', 'jjaassoonn', 'leanprover-bot', 'leanprover-community-mathlib4-bot', 'mathlib-bors'] nobody
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1 year ago
900-15113
900 days ago
5-6524
5 days
8582 eric-wieser
author:eric-wieser
 wip --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict 3/7 Mathlib/Algebra/Category/AlgebraCat/Monoidal.lean,Mathlib/LinearAlgebra/TensorProduct.lean 2 4 ['eric-wieser', 'leanprover-bot'] nobody
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1 year ago
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8616 eric-wieser
author:eric-wieser
 feat(Algebra/FreeAlgebra): add right action and `IsCentralScalar` --- - [ ] depends on: #8652 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-algebra awaiting-CI
label:t-algebra$
 30/8 Mathlib/Algebra/FreeAlgebra.lean 1 1 ['leanprover-community-mathlib4-bot'] nobody
660-49750
1 year ago
907-83692
907 days ago
2-25170
2 days
8658 eric-wieser
author:eric-wieser
 feat: support right actions for `Con` This adds a new `Con.CompatibleSMul` typeclass that captures exactly the condition when `smul` descends to the quotient. I was not quite able to merge this with `MulAction.QuotientAction`: * The imports are such that the congruence relation `QuotientGroup.con` is not yet available in that file * `QuotientGroup.con` requires the subgroup to be normal, while `MulAction.QuotientAction` does not --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict awaiting-author t-algebra
label:t-algebra$
 80/18 Mathlib/GroupTheory/Congruence.lean,Mathlib/RingTheory/Congruence.lean 2 6 ['YaelDillies', 'eric-wieser'] nobody
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1 year ago
877-15397
877 days ago
29-65537
29 days
8788 FMLJohn
author:FMLJohn
 feat(Algebra/Module/GradeZeroModule): if `A` is a graded semiring and `M` is a graded `A`-module, then each grade of `M` is a module over the 0-th grade of `A`. --- - [ ] depends on: #8187 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-algebra
label:t-algebra$
 237/4 Mathlib.lean,Mathlib/Algebra/DirectSum/Internal.lean,Mathlib/Algebra/GradedMonoid.lean,Mathlib/Algebra/Module/GradeZeroModule.lean,Mathlib/RingTheory/GradedAlgebra/Basic.lean,Mathlib/RingTheory/GradedAlgebra/Noetherian.lean 6 4 ['FMLJohn', 'github-actions', 'leanprover-community-mathlib4-bot'] nobody
660-49750
1 year ago
900-39646
900 days ago
1-57831
1 day
8906 jjaassoonn
author:jjaassoonn
 feat: add some missing lemmas about linear algebra --- - [ ] depends on: #8905 [lifting injective modules to higher universe] [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict awaiting-author t-algebra
label:t-algebra$
 45/1 Mathlib/Algebra/Category/ModuleCat/Basic.lean,Mathlib/Algebra/Module/Injective.lean,Mathlib/LinearAlgebra/Basic.lean,Mathlib/LinearAlgebra/BilinearMap.lean 4 21 ['AntoineChambert-Loir', 'alreadydone', 'jjaassoonn', 'leanprover-community-mathlib4-bot'] nobody
660-49750
1 year ago
896-22844
896 days ago
0-343
5 minutes
8961 eric-wieser
author:eric-wieser
 refactor: use the coinduced topology on ULift --- - [x] depends on: #8958 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) please-adopt merge-conflict awaiting-author awaiting-CI 46/14 Mathlib/Analysis/Normed/Group/Basic.lean,Mathlib/Topology/Bornology/Constructions.lean,Mathlib/Topology/Constructions.lean 3 6 ['eric-wieser', 'github-actions', 'leanprover-community-mathlib4-bot', 'urkud'] nobody
660-49750
1 year ago
893-81580
893 days ago
0-1
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9146 laughinggas
author:laughinggas
 feat(Data/ZMod/Defs): Topological structure on `ZMod` Added a discrete topology structure to `ZMod n` for all `n` --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-algebra awaiting-author t-topology
label:t-algebra$
 55/3 Mathlib.lean,Mathlib/Topology/Algebra/Constructions.lean,Mathlib/Topology/Algebra/Group/Basic.lean,Mathlib/Topology/Instances/ZMod.lean,Mathlib/Topology/Maps.lean 5 61 ['YaelDillies', 'eric-wieser', 'github-actions', 'jcommelin', 'laughinggas', 'mo271', 'urkud'] nobody
660-49750
1 year ago
867-7841
867 days ago
7-11053
7 days
9229 eric-wieser
author:eric-wieser
 refactor(Algebra/GradedMonoid): Use `HMul` to define `GMul` This make the notation much nicer, but I'm pretty sure this is a bad idea for performance / ambiguity reasons. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict WIP t-algebra
label:t-algebra$
 114/125 Mathlib/Algebra/DirectSum/Algebra.lean,Mathlib/Algebra/DirectSum/Internal.lean,Mathlib/Algebra/DirectSum/Ring.lean,Mathlib/Algebra/GradedMonoid.lean,Mathlib/Algebra/GradedMulAction.lean,Mathlib/Algebra/Module/GradedModule.lean,Mathlib/Algebra/MonoidAlgebra/ToDirectSum.lean,Mathlib/LinearAlgebra/TensorAlgebra/ToTensorPower.lean,Mathlib/LinearAlgebra/TensorPower.lean,Mathlib/LinearAlgebra/TensorProduct/Graded/Internal.lean,Mathlib/RingTheory/GradedAlgebra/Basic.lean 11 6 ['eric-wieser', 'leanprover-bot'] nobody
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1 year ago
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9252 FR-vdash-bot
author:FR-vdash-bot
 chore: remove redundant covariance instances, add priority I noticed that the following code is surprisingly slow. ``` lean import Mathlib count_heartbeats in example {n : ℕ} : CovariantClass (Fin (n + 1)) (Fin (n + 1)) (· + ·) (· < ·) := by try infer_instance sorry ``` This PR removed some redundant instances. The heartbeats have dropped from 19118 to 11450 (still too slow). Lean4 still seems to make some redundant attempts. See also https://github.com/leanprover-community/mathlib4/issues/6646#issuecomment-1691792488. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) WIP t-algebra t-order merge-conflict slow-typeclass-synthesis awaiting-author
label:t-algebra$
 40/32 Mathlib/Algebra/CovariantAndContravariant.lean,Mathlib/Algebra/Order/Group/Defs.lean,Mathlib/Algebra/Order/Monoid/Defs.lean,Mathlib/CategoryTheory/Abelian/DiagramLemmas/Four.lean 4 8 ['astrainfinita', 'leanprover-bot', 'urkud'] nobody
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1 year ago
unknown
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9354 chenyili0818
author:chenyili0818
 feat: monotonicity of gradient on convex real-valued functions This file is based on Mathlib.Analysis.Calculus.Gradient.Basic, and describes the calculation properties co-authored-by: Ziyu Wang [tropicalfish910@gmail.com](mailto:tropicalfish910@gmail.com) --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict awaiting-author t-analysis 540/0 Mathlib.lean,Mathlib/Analysis/Convex/ConvexFunction.lean 2 15 ['github-actions', 'winstonyin'] nobody
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1 year ago
850-80376
850 days ago
23-36394
23 days
9356 alexjbest
author:alexjbest
 feat: assumption? A little helper for replacing `assumption`s with `exact` statements quickly --- If this is approved I will add tests This begs the question of whether it might simply be better to add some sort of code action for "replace with trythis output" [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict awaiting-author t-meta 24/0 Mathlib.lean,Mathlib/Tactic.lean,Mathlib/Tactic/Common.lean,Mathlib/Tactic/TryAssumption.lean 4 5 ['alexjbest', 'j-loreaux', 'jcommelin'] nobody
660-49750
1 year ago
854-85748
854 days ago
19-26336
19 days
9469 dupuisf
author:dupuisf
 feat: maximum modulus principle for functions vanishing at infinity This PR adds versions of the maximum modulus principle for functions vanishing at infinity that parallel those we already had for functions over a bounded set. These will have applications in e.g. norm interpolation. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) awaiting-author t-analysis 71/0 Mathlib/Analysis/Complex/AbsMax.lean 1 8 ['dupuisf', 'j-loreaux'] nobody
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1 year ago
855-4596
855 days ago
12-86009
12 days
9482 yuma-mizuno
author:yuma-mizuno
 refactor(CategoryTheory/Monoidal): add `LaxMonoidalStruct` Add a `LaxMonoidalStruct` with only the unit morphism `ε` and the tensorator `μ`. This is used in #6307 to provide two different constructors for `LaxMonoidal` that have common `ε` and `μ` but use the tensor of morphisms or the whiskerings. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict WIP t-category-theory 21/8 Mathlib/Algebra/Category/ModuleCat/Adjunctions.lean,Mathlib/CategoryTheory/Monoidal/Functorial.lean,Mathlib/CategoryTheory/Monoidal/Limits.lean 3 0 [] nobody
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9487 eric-wieser
author:eric-wieser
 feat: the exponential of dual numbers over non-commutative rings This is a work in progress, as I don't know my way around the measure theory library. --- - [x] depends on: #9489 - [x] depends on: #9486 - [x] depends on: #10427 - [ ] depends on: #10452 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) WIP t-algebra t-measure-probability merge-conflict t-analysis
label:t-algebra$
 97/0 Mathlib/Analysis/NormedSpace/TrivSqZeroExt.lean 1 7 ['github-actions', 'leanprover-community-mathlib4-bot'] nobody
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9504 alreadydone
author:alreadydone
 chore: remove some IsSeparable assumptions --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict WIP t-algebra
label:t-algebra$
 41/14 Mathlib/NumberTheory/NumberField/Norm.lean,Mathlib/RingTheory/Norm.lean 2 0 [] nobody
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9510 eric-wieser
author:eric-wieser
 feat(Analysis/Calculus/DualNumber): Extending differentiable functions to dual numbers This shows that this operation preserves multiplication and composition --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) WIP t-algebra t-analysis awaiting-CI
label:t-algebra$
 119/0 Mathlib/Analysis/Calculus/DualNumber.lean 1 4 ['github-actions'] nobody
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9570 eric-wieser
author:eric-wieser
 feat(Algebra/Star): Non-commutative generalization of `StarModule` [Zulip thread](https://leanprover.zulipchat.com/#narrow/stream/116395-maths/topic/Star.20modules.20over.20non-commutative.20scalars/near/383664005). Until we address #7152, we have to have both `StarModule` and `StarModule'`. To prove this generalization is useful, this shows that with it as an assumption, `TrivSqZeroExt` is a `StarRing`. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict WIP t-algebra awaiting-CI
label:t-algebra$
 66/6 Mathlib/Algebra/Star/Basic.lean,Mathlib/Algebra/Star/Pi.lean,Mathlib/Algebra/Star/Prod.lean,Mathlib/Algebra/TrivSqZeroExt.lean 4 0 [] nobody
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9642 eric-wieser
author:eric-wieser
 refactor(Analysis/Normed/{Group/Field}/Basic): Let `extends` generate the repeated fields New-style structure shenanigans mean that instance constructors randomly complain about a missing field that can be found with `__ : MetricSpace _ := infer_instance`. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) I will write a longer PR description for this once CI is happy WIP merge-conflict awaiting-author help-wanted t-analysis 122/202 Mathlib/Analysis/Calculus/ContDiff/Basic.lean,Mathlib/Analysis/Complex/Basic.lean,Mathlib/Analysis/Matrix.lean,Mathlib/Analysis/Normed/Field/Basic.lean,Mathlib/Analysis/Normed/Group/Basic.lean,Mathlib/Analysis/Normed/Group/Completion.lean,Mathlib/Analysis/Normed/Order/Basic.lean,Mathlib/Analysis/NormedSpace/ProdLp.lean,Mathlib/Analysis/NormedSpace/Star/Matrix.lean,Mathlib/Analysis/NormedSpace/Unitization.lean,Mathlib/Analysis/Quaternion.lean,Mathlib/Geometry/Manifold/Instances/Sphere.lean,Mathlib/InformationTheory/Hamming.lean,Mathlib/MeasureTheory/Measure/Lebesgue/VolumeOfBalls.lean,Mathlib/NumberTheory/NumberField/CanonicalEmbedding.lean,Mathlib/NumberTheory/Padics/PadicIntegers.lean,Mathlib/Topology/ContinuousFunction/Bounded.lean 17 11 ['eric-wieser', 'leanprover-bot', 'urkud'] nobody
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1 year ago
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6580 adomani
author:adomani
 chore: `move_add`-driven replacements This PR accompanies #6576 and uses `move_add/mul` to simplify/streamline a selection of proofs. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict awaiting-author 12/13 Counterexamples/Monic_nonRegular.lean,Mathlib/Algebra/Associated.lean,Mathlib/Data/Polynomial/RingDivision.lean,Mathlib/LinearAlgebra/QuadraticForm/Basic.lean 4 0 [] nobody
660-49749
1 year ago
946-12513
946 days ago
62-34247
62 days
6630 MohanadAhmed
author:MohanadAhmed
 feat: Reduced Spectral Theorem For A hermitian matrix $A : n \times n$ with rank $A.rank \leq n$, we can eliminate the zero eigenvalues and their corresponding eigenvectors from the (alternate) spectral theorem. As such the matrix $A$ can be written as: $$A = V₁ D V₁ᴴ$$ where - $V₁$ : $n \times r$ is the matrix of eigenvector with non-zero associated eigenvalues. - $D$ is $r \times r$ is the diagonal matrix containing only non-zero eigenvalues on its main diagonal. with $r = A.rank$ being the rank of the matrix Towards that goal we make several equivalence definitions: - `{i // hA.eigenvalues i ≠ 0} ≃ Fin (A.rank)` the set of non-zero eigenvalues can be indexed by the numbers from 0 to (r - 1). - `{i // ¬ hA.eigenvalues i ≠ 0} ≃ Fin (n - A.rank)` the set of non-zero eigenvalues can be indexed by the numbers from 0 to (n - r - 1). - `{i // hA.eigenvalues i ≠ 0} ⊕ {i // ¬hA.eigenvalues i ≠ 0} ≃ n`: the index set of the matrix (together with the associated eigenvector matrix and eigenvalues matrix ) can be partitioned into two complement groups the ones corresponding to non-zero eigenvalues and the ones corresponding to zero eigenvalues. - We can then put the previous definitions together to obtain a: `Fin (A.rank) ⊕ Fin (Fintype.card n - A.rank) ≃ n` --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict WIP t-algebra
label:t-algebra$
 31/0 Mathlib/LinearAlgebra/Matrix/Spectrum.lean 1 0 [] nobody
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1 year ago
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6777 adomani
author:adomani
 chore(Co*variantClass): replace eta-expanded (· * ·), (· + ·), (· ≤ ·), (· < ·) Replace `CovariantClass X X (· * ·) (· ≤ ·)` with -> `CovariantClass X X HMul.hMul LE.le` and similarly for `HAdd`, `LT`, `Contravariant`. This PR is inspired by [Issue #6646](https://github.com/leanprover-community/mathlib4/issues/6646) and, more specifically, [this comment](https://github.com/leanprover-community/mathlib4/issues/6646#issuecomment-1692792066). Note that https://github.com/leanprover/lean4/pull/2267 would make this unnecessary --- ```bash # First sed command: # the first captured pattern is `Co*variantClass ` # the second captured pattern is `` # the third captured pattern is `+` or `*` # the fourth captured pattern is `<` or `≤` # a match for `Co*variantClass (· ·) (· ·)` becomes # `Co*variantClass replaceop replaceop` # Second sed command: similar to the first, but looks for `(Function.swap (· ·))` sed -i ' s=\(Co[ntra]*variantClass \(..*\) \2 \)(· *\([+*]\) *·) (· *\([<≤]\) *·)=\1replaceop\3 replaceop\4=g s=\(Co[ntra]*variantClass \(..*\) \2 \)(\([Functio\.swap ]*\)(· *\([+*]\) *·)) (· *\([<≤]\) *·)=\1(\3replaceop\4) replaceop\5=g s=replaceop+=HAdd.hAdd=g s=replaceop\*=HMul.hMul=g s=replaceop<=LT.lt=g s=replaceop≤=LE.le=g s=\(Co[ntra]*variantClass N N\) (· \* ·) r=\1 HMul.hMul r=g s=\(Co[ntra]*variantClass N N (swap μ)\) (· ≤ ·)=\1 LE.le=g s=\(Co[ntra]*variantClass N N\) (swap (· \* ·)) r=\1 (swap HMul.hMul) r=g s=\(CovariantClass (Filter α) (Filter α)\) (· / ·) (· ≤ ·)=\1 HDiv.hDiv LE.le=g s=\(CovariantClass (Filter α) (Filter α)\) (swap (· / ·)) (· ≤ ·)=\1 (swap HDiv.hDiv) LE.le=g s=\(Co[ntra]*variantClass .* (fun x y .> . \* .)\) (· ≤ ·)=\1 LE.le=g s=\(Co[ntra]*variantClass .* (fun x y .> . \* .)\) (· < ·)=\1 LT.lt=g s=\(Co[ntra]*variantClass [^}]*\) (· ≤ ·)=\1 LE.le=g s=\(CovariantClass .* (Filter β)\) (· • ·) LE.le=\1 HSMul.hSMul LE.le=g ' $(git ls-files '*.lean') ``` [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict 703/678 Counterexamples/ZeroDivisorsInAddMonoidAlgebras.lean,Mathlib/Algebra/BigOperators/Basic.lean,Mathlib/Algebra/Bounds.lean,Mathlib/Algebra/CovariantAndContravariant.lean,Mathlib/Algebra/DirectSum/Internal.lean,Mathlib/Algebra/Group/UniqueProds.lean,Mathlib/Algebra/GroupPower/Order.lean,Mathlib/Algebra/MonoidAlgebra/Degree.lean,Mathlib/Algebra/Order/Archimedean.lean,Mathlib/Algebra/Order/Group/Abs.lean,Mathlib/Algebra/Order/Group/Defs.lean,Mathlib/Algebra/Order/Group/DenselyOrdered.lean,Mathlib/Algebra/Order/Group/MinMax.lean,Mathlib/Algebra/Order/Group/OrderIso.lean,Mathlib/Algebra/Order/Hom/Monoid.lean,Mathlib/Algebra/Order/Interval.lean,Mathlib/Algebra/Order/Kleene.lean,Mathlib/Algebra/Order/LatticeGroup.lean,Mathlib/Algebra/Order/Module.lean,Mathlib/Algebra/Order/Monoid/Basic.lean,Mathlib/Algebra/Order/Monoid/Cancel/Defs.lean,Mathlib/Algebra/Order/Monoid/Canonical/Defs.lean,Mathlib/Algebra/Order/Monoid/Defs.lean,Mathlib/Algebra/Order/Monoid/Lemmas.lean,Mathlib/Algebra/Order/Monoid/MinMax.lean,Mathlib/Algebra/Order/Monoid/NatCast.lean,Mathlib/Algebra/Order/Monoid/OrderDual.lean,Mathlib/Algebra/Order/Monoid/Prod.lean,Mathlib/Algebra/Order/Monoid/WithTop.lean,Mathlib/Algebra/Order/Monoid/WithZero/Basic.lean,Mathlib/Algebra/Order/Monoid/WithZero/Defs.lean,Mathlib/Algebra/Order/Nonneg/Ring.lean,Mathlib/Algebra/Order/Pointwise.lean,Mathlib/Algebra/Order/Positive/Ring.lean,Mathlib/Algebra/Order/Ring/Canonical.lean,Mathlib/Algebra/Order/Ring/Defs.lean,Mathlib/Algebra/Order/Ring/Lemmas.lean,Mathlib/Algebra/Order/Sub/Basic.lean,Mathlib/Algebra/Order/Sub/Canonical.lean,Mathlib/Algebra/Order/Sub/Defs.lean,Mathlib/Algebra/Order/WithZero.lean,Mathlib/Algebra/Parity.lean,Mathlib/Algebra/Star/Order.lean,Mathlib/Algebra/Tropical/Basic.lean,Mathlib/Analysis/Normed/Order/Lattice.lean,Mathlib/Data/DFinsupp/Lex.lean,Mathlib/Data/DFinsupp/Order.lean,Mathlib/Data/Finset/Fold.lean,Mathlib/Data/Finsupp/Lex.lean,Mathlib/Data/Finsupp/Order.lean,Mathlib/Data/List/BigOperators/Basic.lean,Mathlib/Data/List/BigOperators/Lemmas.lean,Mathlib/Data/Multiset/Basic.lean,Mathlib/Data/Nat/Cast/Order.lean,Mathlib/Data/PNat/Basic.lean,Mathlib/Data/Real/ENNReal.lean,Mathlib/Data/Real/NNReal.lean,Mathlib/Data/Set/Semiring.lean,Mathlib/Data/Sign.lean,Mathlib/MeasureTheory/Function/LpOrder.lean,Mathlib/MeasureTheory/Function/SimpleFuncDenseLp.lean,Mathlib/MeasureTheory/Measure/MeasureSpace.lean,Mathlib/MeasureTheory/Measure/VectorMeasure.lean,Mathlib/Order/ConditionallyCompleteLattice/Group.lean,Mathlib/Order/Filter/Basic.lean,Mathlib/Order/Filter/Pointwise.lean,Mathlib/Probability/Martingale/Basic.lean,Mathlib/Probability/Process/Stopping.lean,Mathlib/RingTheory/GradedAlgebra/Basic.lean,Mathlib/SetTheory/Cardinal/Basic.lean,Mathlib/SetTheory/Game/Basic.lean,Mathlib/SetTheory/Game/PGame.lean,Mathlib/SetTheory/Ordinal/Arithmetic.lean,Mathlib/SetTheory/Ordinal/Basic.lean,Mathlib/SetTheory/Ordinal/NaturalOps.lean,Mathlib/Tactic/GCongr/Core.lean,Mathlib/Tactic/Positivity/Basic.lean,Mathlib/Topology/ContinuousFunction/Algebra.lean,lean-toolchain,test/Recall.lean,test/propose.lean 81 37 ['adomani', 'alreadydone', 'digama0', 'eric-wieser', 'ericrbg', 'jcommelin', 'leanprover-bot', 'sgouezel', 'vihdzp'] nobody
660-49749
1 year ago
935-15246
935 days ago
35-63136
35 days
6791 eric-wieser
author:eric-wieser
 refactor: Use flat structures for morphisms This restores the symmetry we had in Lean3, where we had `MonoidHom.mk f one mul` not `MonoidHom.mk (OneHom.mk f one) mul`, and `f.toFun` wasn't notation for `f.toMulHom.toFun`. The nesting provided by the previous inheritance is useless to us in the face of `MonoidHomClass.toMonoidHom`, which completely eta-expands the structure anyway. We call the class `FunLikeFlatHack._` because this means the field is called `to_` which uses up less space in the goal view than any alternative. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict awaiting-author help-wanted awaiting-CI 174/201 Mathlib/Algebra/Algebra/Equiv.lean,Mathlib/Algebra/Algebra/Hom.lean,Mathlib/Algebra/Category/GroupCat/ZModuleEquivalence.lean,Mathlib/Algebra/Category/GroupWithZeroCat.lean,Mathlib/Algebra/Category/ModuleCat/Presheaf.lean,Mathlib/Algebra/Category/MonCat/Basic.lean,Mathlib/Algebra/Group/Ext.lean,Mathlib/Algebra/Group/Prod.lean,Mathlib/Algebra/Group/UniqueProds.lean,Mathlib/Algebra/Hom/Equiv/Basic.lean,Mathlib/Algebra/Hom/Group/Defs.lean,Mathlib/Algebra/Hom/GroupAction.lean,Mathlib/Algebra/Hom/NonUnitalAlg.lean,Mathlib/Algebra/Hom/Ring/Defs.lean,Mathlib/Algebra/Lie/Basic.lean,Mathlib/Algebra/Module/Equiv.lean,Mathlib/Algebra/Module/LinearMap.lean,Mathlib/Algebra/Order/Hom/Ring.lean,Mathlib/Algebra/Order/Interval.lean,Mathlib/Algebra/Ring/Equiv.lean,Mathlib/Analysis/Normed/Group/SemiNormedGroupCat.lean,Mathlib/Data/FunLike/Basic.lean,Mathlib/Data/Rat/Cast/CharZero.lean,Mathlib/Data/Real/EReal.lean,Mathlib/Data/Real/Sqrt.lean,Mathlib/GroupTheory/FreeAbelianGroup.lean,Mathlib/GroupTheory/MonoidLocalization.lean,Mathlib/LinearAlgebra/Quotient.lean,Mathlib/LinearAlgebra/TensorProduct.lean,Mathlib/RingTheory/RingInvo.lean,Mathlib/Topology/Algebra/Module/Basic.lean,Mathlib/Topology/MetricSpace/Dilation.lean 32 0 [] nobody
660-49749
1 year ago
unknown
0-0
0 seconds
6930 kmill
author:kmill
 feat: `resynth_instances` tactic for resynthesizing instances in the goal or local context This tactic can be useful for debugging non-canonical instances or for fixing up goals and hypotheses after using the `classical` tactic. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict WIP t-meta 327/0 Mathlib.lean,Mathlib/Tactic.lean,Mathlib/Tactic/ResynthInstances.lean,test/ResynthInstances.lean 4 0 [] nobody
660-49749
1 year ago
unknown
0-0
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6931 urkud
author:urkud
 refactor(Analysis/Normed*): use `RingHomIsometric` for `*.norm_cast` --- I don't understand why linter fails. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict help-wanted t-analysis 78/68 Mathlib/Analysis/LocallyConvex/ContinuousOfBounded.lean,Mathlib/Analysis/Normed/Field/Basic.lean,Mathlib/Analysis/Normed/Group/Basic.lean,Mathlib/Analysis/NormedSpace/Basic.lean,Mathlib/Analysis/NormedSpace/Exponential.lean,Mathlib/Analysis/NormedSpace/Spectrum.lean,Mathlib/Analysis/RCLike/Basic.lean,Mathlib/NumberTheory/NumberField/Embeddings.lean 8 0 [] nobody
660-49749
1 year ago
unknown
0-0
0 seconds
7225 jjaassoonn
author:jjaassoonn
 some random stuff - Consider two commutative rings `R` and `S` and `X` and `(R, S)`-bimodule. Consider the tensor functor `(X ⊗[R] .)` from the category of `R`-modules to the category of `S`-modules and the hom functor `X →ₗ[S] .` from the category of `S`-modules to the category of `R`-modules, they form an adjunction. - direct limits of modules commute with tensor product - A proof of ![00HD](https://stacks.math.columbia.edu/tag/00HD) Three definitions for flatness: 1. in terms of injectiveness ```lean def Flat.injective : Prop := ∀ ⦃N N' : ModuleCat.{u} R⦄ (L : N ⟶ N'), Function.Injective L → Function.Injective ((tensorRight (ModuleCat.of R M)).map L) ``` 2. in terms of ideals ```lean def Flat.ideal : Prop := ∀ (I : Ideal R), Function.Injective (TensorProduct.lift ((lsmul R M).comp I.subtype)) ``` 3. in terms of finitely generated ideal ```lean def Flat.fg_ideal : Prop := ∀ ⦃I : Ideal R⦄ (_ : I.FG), Function.Injective (TensorProduct.lift ((lsmul R M).comp I.subtype)) ``` and they are all equivalent: ```lean lemma tfae : List.TFAE [ Flat.injective R M, Flat.ideal R M, Flat.fg_ideal R M ] := by ``` The dependencies between these changed files are: ``` Algebra.Module.LinearMap--------------------------------- | | | | v v Algebra.Category.ModuleCat.TensorProduct -----> Algebra.Character | | | v Algebra.DirectLimitAndTensorProduct -------------> RingTheory.Flat ``` to prove equivalence of other definitions, e.g. exact functor, tor, etc should be easier with this because the proof is will be categorical --- ------------- Some other stuff not about flatness 1. If $S$ is a submonoid and $I$ is maximally disjoint from $S$ then $I$ is prime 2. if $\mathfrak p$ is a minimal prime, then $x \in \mathfrak p$ implies that $x$ is a zero divisor 3. Noetherian rings has only finitely many minimal ideals 4. One version of [the prime avoidance lemma](https://en.wikipedia.org/wiki/Prime_avoidance_lemma): if $E$ is an addsubgroup of a ring and is mutiplicatively closed, and $\mathfrak p_i$ is some prime ideals, then not being any subset of the individual prime ideal implies that not being a subset of their union ---------- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict 1828/16 Mathlib.lean,Mathlib/Algebra/Category/ModuleCat/TensorProduct.lean,Mathlib/Algebra/Character.lean,Mathlib/Algebra/DirectLimitAndTensorProduct.lean,Mathlib/Algebra/Module/LinearMap.lean,Mathlib/AlgebraicGeometry/PrimeSpectrum/Basic.lean,Mathlib/AlgebraicGeometry/PrimeSpectrum/Noetherian.lean,Mathlib/CategoryTheory/Functor/Fin.lean,Mathlib/CategoryTheory/ShortExactSequence.lean,Mathlib/RingTheory/Flat.lean,Mathlib/RingTheory/Ideal/Basic.lean,Mathlib/RingTheory/Ideal/MinimalPrime.lean,Mathlib/RingTheory/Ideal/PrimeAvoidance.lean 13 6 ['eric-wieser', 'jjaassoonn'] nobody
660-49749
1 year ago
unknown
0-0
0 seconds
7227 kmill
author:kmill
 feat: flexible binders and integration into notation3 Introduces `flexibleBinders`, which is an extensible system for binder notations that allow destructuring, bounded domains, and other niceties. Integrates this into `notation3`, and makes `Finset.sum`/`Finset.prod` use it. --- - [ ] depends on: #6833 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict WIP t-meta 1215/131 Mathlib.lean,Mathlib/Algebra/BigOperators/Basic.lean,Mathlib/Algebra/BigOperators/Intervals.lean,Mathlib/Algebra/BigOperators/NatAntidiagonal.lean,Mathlib/Mathport/Notation.lean,Mathlib/Util/FlexibleBinders.lean,Mathlib/Util/FlexibleBindersFinset.lean,Mathlib/Util/SyntaxFun.lean,test/FlexibleBinders.lean,test/notation3.lean 10 3 ['eric-wieser', 'kmill', 'leanprover-community-mathlib4-bot'] nobody
660-49749
1 year ago
unknown
0-0
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7351 shuxuezhuyi
author:shuxuezhuyi
 feat(Topology/Algebra/Order): extend function on `Ioo` to `Icc` Extend a strictly monotone function defined on an open interval. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict awaiting-author t-order 59/0 Mathlib.lean,Mathlib/Data/Set/Function.lean,Mathlib/Topology/Algebra/Order/IccExtendFromIoo.lean 3 7 ['j-loreaux', 'shuxuezhuyi'] nobody
660-49749
1 year ago
939-18577
939 days ago
30-32706
30 days
7467 ADedecker
author:ADedecker
 feat: spectrum of X →ᵇ ℂ is StoneCech X --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict WIP t-analysis 121/23 Mathlib/Analysis/NormedSpace/Star/BoundedContinuousFunction.lean,Mathlib/Analysis/NormedSpace/Star/GelfandDuality.lean,Mathlib/Topology/ContinuousFunction/Bounded.lean,Mathlib/Topology/ContinuousFunction/Compact.lean 4 1 ['github-actions'] nobody
660-49749
1 year ago
unknown
0-0
0 seconds
7512 Komyyy
author:Komyyy
 perf: override the data structures of coinductive types The data structures of the model of coinductive types (`Stream'`, `Computation`, `Stream'.Seq`) are inefficient, so we override their data structures. --- - [x] depends on: #7514 - [ ] depends on: leanprover/lean4#2292 - [x] depends on: leanprover/std4#371 - [x] depends on: #8460 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) WIP blocked-by-core-PR blocked-by-other-PR merge-conflict t-meta 6919/3700 Mathlib.lean,Mathlib/Algebra/ContinuedFractions/Basic.lean,Mathlib/Algebra/ContinuedFractions/Computation/ApproximationCorollaries.lean,Mathlib/Algebra/ContinuedFractions/Computation/Approximations.lean,Mathlib/Algebra/ContinuedFractions/Computation/Basic.lean,Mathlib/Algebra/ContinuedFractions/Computation/CorrectnessTerminating.lean,Mathlib/Algebra/ContinuedFractions/Computation/TerminatesIffRat.lean,Mathlib/Algebra/ContinuedFractions/Computation/Translations.lean,Mathlib/Algebra/ContinuedFractions/ContinuantRecurrence.lean,Mathlib/Algebra/ContinuedFractions/EvalEquiv.lean,Mathlib/Algebra/ContinuedFractions/Real.lean,Mathlib/Algebra/ContinuedFractions/TerminatedStable.lean,Mathlib/Algebra/ContinuedFractions/Translations.lean,Mathlib/Combinatorics/Hindman.lean,Mathlib/Control/Fix.lean,Mathlib/Control/LawfulFix.lean,Mathlib/Data/Seq/Computation.lean,Mathlib/Data/Seq/Parallel.lean,Mathlib/Data/Seq/Seq.lean,Mathlib/Data/Seq/WSeq.lean,Mathlib/Data/Stream.lean,lean-toolchain 22 2 ['digama0', 'leanprover-community-mathlib4-bot'] nobody
660-49749
1 year ago
unknown
0-0
0 seconds
7564 shuxuezhuyi
author:shuxuezhuyi
 feat(Topology/Algebra/Order): extend strictly monotone function on `Ioo` to homeomorphism on `Icc` A strictly monotone function between open intervals can be extended to a homeomorphism between the closed intervals. --- - [ ] depends on: #7351 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-topology blocked-by-other-PR 162/0 Mathlib.lean,Mathlib/Topology/Algebra/Order/IccExtendFromIoo.lean 2 1 ['leanprover-community-mathlib4-bot'] nobody
660-49749
1 year ago
958-36981
958 days ago
0-537
8 minutes
7601 digama0
author:digama0
 feat: ring hom support in `ring` As [requested on Zulip](https://leanprover.zulipchat.com/#narrow/stream/287929-mathlib4/topic/aroots/near/395750055). Adds support for distributing ring morphisms in `ring`: ```lean example (p : ℤ[X]) (r : ℤ) : C (2 * r) * p = C r * p + C r * p := by ring ``` --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict awaiting-author t-algebra t-meta
label:t-algebra$
 257/48 Mathlib/Tactic/Ring/Basic.lean,test/linear_combination.lean,test/ring.lean 3 1 ['eric-wieser'] nobody
660-49749
1 year ago
893-33352
893 days ago
62-28836
62 days
7615 eric-wieser
author:eric-wieser
 chore(LinearAlgebra/Basic): generalize compatibleMaps to semilinear maps Spotted while reviewing #7611 --- - [x] depends on: #7611 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-algebra easy awaiting-CI
label:t-algebra$
 9/33 Mathlib/LinearAlgebra/Basic.lean 1 1 ['leanprover-community-mathlib4-bot'] nobody
660-49749
1 year ago
954-84457
954 days ago
0-1
1 second
7713 RemyDegenne
author:RemyDegenne
 feat: add_left/right_inj for measures `μ + ν₁ = μ + ν₂ ↔ ν₁ = ν₂`, and similarly on the right. This is not true in general for measures, but is true when `μ` is mutually singular with the two other measures or when `μ` is finite. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict awaiting-author t-measure-probability 53/1 Mathlib/MeasureTheory/Measure/MutuallySingular.lean,lean-toolchain 2 6 ['RemyDegenne', 'digama0', 'eric-wieser', 'fpvandoorn'] nobody
660-49749
1 year ago
948-43887
948 days ago
0-62955
17 hours
7835 shuxuezhuyi
author:shuxuezhuyi
 feat(LinearAlgebra/Matrix): `lift` for projective special linear group We provide converters to help with the use of "quotient.liftOn" on projective special linear groups. --- - [x] depends on: #7826 - [x] depends on: #7791 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict awaiting-author t-algebra
label:t-algebra$
 52/0 Mathlib/LinearAlgebra/Matrix/ProjectiveSpecialLinearGroup.lean 1 3 ['jcommelin', 'leanprover-community-mathlib4-bot', 'shuxuezhuyi'] jcommelin
assignee:jcommelin
660-49749
1 year ago
806-59580
806 days ago
1-85797
1 day
7875 astrainfinita
author:astrainfinita
 chore: make `SMulCommClass A A B` and `SMulCommClass A B B` higher priority --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict slow-typeclass-synthesis t-algebra
label:t-algebra$
 54/48 Mathlib/Algebra/Algebra/Basic.lean,Mathlib/Algebra/Algebra/NonUnitalSubalgebra.lean,Mathlib/Algebra/DirectSum/Algebra.lean,Mathlib/Algebra/Group/Action/Defs.lean,Mathlib/Algebra/Group/Subgroup/Actions.lean,Mathlib/Algebra/Lie/NonUnitalNonAssocAlgebra.lean,Mathlib/Algebra/Module/LinearMap/End.lean,Mathlib/Algebra/MonoidAlgebra/Basic.lean,Mathlib/Algebra/MvPolynomial/Basic.lean,Mathlib/Algebra/Ring/CentroidHom.lean,Mathlib/Algebra/Ring/Subring/Basic.lean,Mathlib/Algebra/Ring/Subsemiring/Basic.lean,Mathlib/Algebra/Star/NonUnitalSubalgebra.lean,Mathlib/Analysis/Complex/UnitDisc/Basic.lean,Mathlib/Analysis/NormedSpace/lpSpace.lean,Mathlib/Data/Matrix/Basic.lean,Mathlib/GroupTheory/GroupAction/Prod.lean,Mathlib/GroupTheory/GroupAction/Ring.lean,Mathlib/GroupTheory/GroupAction/SubMulAction.lean,Mathlib/GroupTheory/MonoidLocalization.lean,Mathlib/GroupTheory/Submonoid/Center.lean,Mathlib/LinearAlgebra/PiTensorProduct.lean,Mathlib/RingTheory/Ideal/Quotient.lean,Mathlib/RingTheory/TensorProduct/Basic.lean,Mathlib/Topology/ContinuousFunction/ContinuousMapZero.lean,Mathlib/Topology/ContinuousFunction/StoneWeierstrass.lean,Mathlib/Topology/ContinuousFunction/ZeroAtInfty.lean 27 15 ['Parcly-Taxel', 'astrainfinita', 'jcommelin', 'leanprover-bot'] nobody
660-49749
1 year ago
714-66257
714 days ago
1-47913
1 day
7932 eric-wieser
author:eric-wieser
 refactor(Algebra/TrivSqZeroExt): replace with a structure This is dogfooding my claim that "one-field structures are the lesser evil in Lean 4". This runs into the `simp [(stupid_parens)]` bug; or rather, a particular nasty instance of it where the offending simp call is inside `@[simps]`. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-algebra awaiting-CI
label:t-algebra$
 155/73 Mathlib/Algebra/DualNumber.lean,Mathlib/Algebra/TrivSqZeroExt.lean,Mathlib/Logic/Equiv/TransferInstance.lean,Mathlib/Topology/Instances/TrivSqZeroExt.lean 4 1 ['github-actions'] nobody
660-49749
1 year ago
unknown
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7962 eric-wieser
author:eric-wieser
 feat: `DualNumber (Quaternion R)` as a `CliffordAlgebra` This provides a clifford algebra isomorphic to the dual quaternions --- - [x] depends on: #7934 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict WIP t-algebra
label:t-algebra$
 307/7 Mathlib/Algebra/DualNumber.lean,Mathlib/Algebra/QuaternionBasis.lean,Mathlib/LinearAlgebra/CliffordAlgebra/Equivs.lean 3 16 ['github-actions', 'leanprover-community-mathlib4-bot'] nobody
660-49749
1 year ago
unknown
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8364 thorimur
author:thorimur
 feat: `refine?` This PR adds `refine? e`, which suggests replacing unsynthesized `_`'s in `e` with `?_` in order to make `refine e'` work: ```lean example : Nat → Nat := by refine? fun (_ : _) => _ -- Try this: refine fun (_ : _) => ?_ ``` Note that this only suggests replacements for `_`'s present in the syntax; to create goals for implicit or instance arguments, the user is expected to use `refine'`. --- I'm especially open to suggestions on the filename (currently `RefineFix`). I'm also curious if this behaves as expected! Feel free to try it out "in real life" and comment here on edge cases. - [ ] depends on: #8503 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict blocked-by-other-PR t-meta 684/5 Mathlib.lean,Mathlib/Lean/CoreM.lean,Mathlib/Lean/Elab/Tactic/ElabTerm.lean,Mathlib/Lean/Elab/Term.lean,Mathlib/Tactic.lean,Mathlib/Tactic/RefineFix.lean,Mathlib/Util/Delaborators.lean,Mathlib/Util/Syntax.lean,test/RefineFix.lean 9 5 ['j-loreaux', 'leanprover-community-mathlib4-bot', 'thorimur'] nobody
660-49749
1 year ago
915-69883
915 days ago
6-59892
6 days
3575 Kha
author:Kha
 perf: selectively enable precompilation --- This is an initial performance test on Linux. TODO: - [ ] test on macOS and Windows as well - [ ] adapt caching merge-conflict WIP 3/0 lakefile.lean 1 21 ['Kha', 'kim-em', 'leanprover-bot', 'tydeu'] nobody
660-49748
1 year ago
unknown
0-0
0 seconds
4771 thorimur
author:thorimur
 feat: Backtrack minimize Utilities for backtracking in order to attain a minimum according to some arbitrary notion of size when generating lists of parts and alternatives in alternating fashion. Motivated by minimizing the number of generated subgoals under apply-like actions on the goal. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-meta 482/1 Mathlib/Tactic/Backtracking.lean,test/Backtracking.lean 2 0 [] nobody
660-49748
1 year ago
unknown
0-0
0 seconds
4775 thorimur
author:thorimur
 feat: `SubExpr` utilities This file contains utilities for handling positions in expressions, including folding over subexpressions along with their positions. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict WIP t-meta 148/0 Mathlib.lean,Mathlib/Lean/SubExpr.lean 2 0 [] nobody
660-49748
1 year ago
unknown
0-0
0 seconds
4785 thorimur
author:thorimur
 feat: ExprWithLevels This introduces `ExprWithLevels`, a means of emulating universe polymorphism for non-constants during metaprogramming. [Description pending] - [ ] depends on: #4786 --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict blocked-by-other-PR t-meta 491/1 Mathlib.lean,Mathlib/Lean/Meta/AppBuilder.lean,Mathlib/Lean/Meta/Basic.lean,Mathlib/Lean/Meta/ExprWithLevels.lean 4 1 ['kim-em'] nobody
660-49748
1 year ago
unknown
0-0
0 seconds
4871 j-loreaux
author:j-loreaux
 feat: define the additive submonoid of positive elements in a star ordered ring This file defines the `AddSubmonoid` of nonegative elements `StarOrderedRing.positive R` in a star ordered ring `R` with carrier `{ x : R | 0 ≤ x }` (in fact, the definition only requires `OrderedAddCommMonoid R` to allow for other use cases, but it is primarily intended for `StarOrderedRing R`). Equivalently, this is the `AddSubmonoid` generated by the elements of the form `star s * s`. Even though this technically corresponds to the nonnegative elements, the "positive" terminology is standard throughout the literature (at least in C⋆-algebra theory and operator theory), so we choose to prefer that. The advantage of using this over other definitions of positivity is that it allows us to unify several different concepts under a single umbrella. For example, one might be tempted to consider the collection of bounded linear operators on an Hilbert space and define positivity as `∀ x, 0 ≤ ⟪T x, x⟫`, but this doesn't generalize nicely to C⋆-algebras. Alternatively, one could define positivity as those self-adjoint elements with nonnegative spectrum, but this requires the algebra to be unital. Our definition herein conveniently sidesteps these issues. --- Note: I declared the `AddMonoidWithOne` and `AddGroupWithOne` instances for `selfAdjoint R` separately because it made the proof of the latter easier. - [x] depends on: #6229 - [x] depends on: #10209 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-algebra awaiting-CI
label:t-algebra$
 216/12 Mathlib.lean,Mathlib/Algebra/Order/Ring/CharZero.lean,Mathlib/Algebra/Star/Order.lean,Mathlib/Algebra/Star/Positive.lean,Mathlib/Algebra/Star/SelfAdjoint.lean,Mathlib/GroupTheory/Submonoid/Operations.lean 6 28 ['eric-wieser', 'j-loreaux', 'leanprover-community-mathlib4-bot'] nobody
660-49748
1 year ago
1073-35800
1073 days ago
5-55287
5 days
5133 kmill
author:kmill
 feat: IntermediateField adjoin syntax for sets of elements Adds support for both `F⟮S⟯` and `F⟮α⟯`. The term `x` in `F⟮x⟯` is elaborated, and if it has type `Set _` the first interpretation is used, and otherwise the second is. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict WIP t-algebra
label:t-algebra$
 110/55 Mathlib/FieldTheory/Adjoin.lean 1 0 [] nobody
660-49748
1 year ago
1071-50874
1071 days ago
0-20
20 seconds
5912 ADedecker
author:ADedecker
 feat(Analysis.Distribution.ContDiffMapSupportedIn): space of smooth maps with support in a fixed compact --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict WIP t-analysis 513/13 Mathlib.lean,Mathlib/Analysis/Distribution/ContDiffMapSupportedIn.lean,Mathlib/Analysis/LocallyConvex/WithSeminorms.lean,Mathlib/Analysis/Seminorm.lean,Mathlib/Data/FunLike/Basic.lean,Mathlib/Data/Set/Function.lean,Mathlib/Topology/Algebra/Module/StrongTopology.lean,Mathlib/Topology/ContinuousFunction/Bounded.lean 8 0 [] nobody
660-49748
1 year ago
unknown
0-0
0 seconds
6002 slerpyyy
author:slerpyyy
 feat(Analysis.SpecialFunctions.Gaussian): add `integrable_fun_mul_exp_neg_mul_sq` If `f : ℝ → ℝ` is bounded by a polynomial, `fun x : ℝ => f x * exp (-b * x ^ 2)` is integrable. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict awaiting-author t-analysis 26/0 Mathlib/Analysis/SpecialFunctions/Gaussian.lean 1 3 ['ocfnash', 'slerpyyy', 'urkud'] nobody
660-49748
1 year ago
1028-50110
1028 days ago
9-71263
9 days
6195 eric-wieser
author:eric-wieser
 chore(RingTheory/TensorProduct): golf the `mul` definition --- - [x] depends on: #6211 - [x] depends on: #6187 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) Strangely this causes a timeout downstream merge-conflict t-algebra awaiting-CI
label:t-algebra$
 4/29 Mathlib/RingTheory/TensorProduct.lean 1 1 ['leanprover-community-mathlib4-bot'] nobody
660-49748
1 year ago
unknown
0-0
0 seconds
6307 yuma-mizuno
author:yuma-mizuno
 refactor(CategoryTheory/Monoidal): add whiskering operators We introduce whiskering operators. This allows us to introduce a simp-normal form for morphisms in monoidal categories. Rewriting into simp-normal forms is especially useful when combined with the coherence tactic. --- - [x] depends on: #6420 - [x] depends on: #8191 - [x] depends on: #9988 - [x] depends on: #9991 - [x] depends on: #9995 - [x] depends on: #10061 - [x] depends on: #10078 - [x] depends on: #10898 - [x] depends on: #10912 - [x] depends on: #11223 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict awaiting-author t-category-theory 325/280 Mathlib/Algebra/Category/ModuleCat/Adjunctions.lean,Mathlib/CategoryTheory/Bicategory/End.lean,Mathlib/CategoryTheory/Closed/Ideal.lean,Mathlib/CategoryTheory/Monoidal/Category.lean,Mathlib/CategoryTheory/Monoidal/Center.lean,Mathlib/CategoryTheory/Monoidal/Free/Basic.lean,Mathlib/CategoryTheory/Monoidal/Free/Coherence.lean,Mathlib/CategoryTheory/Monoidal/Functor.lean,Mathlib/CategoryTheory/Monoidal/FunctorCategory.lean,Mathlib/CategoryTheory/Monoidal/Limits.lean,Mathlib/CategoryTheory/Monoidal/Mon_.lean,Mathlib/CategoryTheory/Monoidal/NaturalTransformation.lean,Mathlib/CategoryTheory/Monoidal/Opposite.lean,Mathlib/CategoryTheory/Monoidal/Transport.lean,test/CategoryTheory/Coherence.lean 15 38 ['eric-wieser', 'github-actions', 'grunweg', 'jcommelin', 'kim-em', 'leanprover-community-mathlib4-bot', 'yuma-mizuno'] nobody
660-49748
1 year ago
799-16022
799 days ago
60-84345
60 days
6328 FR-vdash-bot
author:FR-vdash-bot
 chore: make some instance about `Sub...Class` lower priority Many similar instances have been marked as lower priority. I'd like to see if this would make things faster. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict WIP t-algebra awaiting-CI
label:t-algebra$
 14/14 Mathlib/RingTheory/NonUnitalSubsemiring/Basic.lean,Mathlib/RingTheory/Subsemiring/Basic.lean,lean-toolchain 3 1 ['digama0'] nobody
660-49748
1 year ago
unknown
0-0
0 seconds
6330 astrainfinita
author:astrainfinita
 chore: make some instance about `Sub...Class` higher priority than `Sub...` The opposite direction to #6328. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict WIP t-algebra slow-typeclass-synthesis
label:t-algebra$
 123/128 Mathlib/Algebra/Algebra/NonUnitalSubalgebra.lean,Mathlib/Algebra/Algebra/Subalgebra/Basic.lean,Mathlib/Algebra/Star/NonUnitalSubalgebra.lean,Mathlib/FieldTheory/IsAlgClosed/Basic.lean,Mathlib/FieldTheory/Subfield.lean,Mathlib/RingTheory/NonUnitalSubring/Basic.lean,Mathlib/RingTheory/NonUnitalSubsemiring/Basic.lean,Mathlib/RingTheory/Polynomial/Quotient.lean,Mathlib/RingTheory/Subring/Basic.lean,Mathlib/RingTheory/Subsemiring/Basic.lean,lean-toolchain 11 13 ['astrainfinita', 'digama0', 'leanprover-bot'] nobody
660-49748
1 year ago
unknown
0-0
0 seconds
6403 astrainfinita
author:astrainfinita
 chore: change instance priorities of `Ordered*` hierarchy --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra t-order merge-conflict slow-typeclass-synthesis awaiting-author
label:t-algebra$
 253/79 Mathlib/Algebra/Order/CompleteField.lean,Mathlib/Algebra/Order/Field/Canonical/Defs.lean,Mathlib/Algebra/Order/Field/Defs.lean,Mathlib/Algebra/Order/Group/Defs.lean,Mathlib/Algebra/Order/Monoid/Basic.lean,Mathlib/Algebra/Order/Monoid/Canonical/Defs.lean,Mathlib/Algebra/Order/Monoid/Defs.lean,Mathlib/Algebra/Order/Monoid/WithZero/Defs.lean,Mathlib/Algebra/Order/Ring/Canonical.lean,Mathlib/Algebra/Order/Ring/Defs.lean,Mathlib/Algebra/Order/Ring/Star.lean,Mathlib/Algebra/Order/WithZero.lean,Mathlib/Analysis/InnerProductSpace/Orientation.lean,Mathlib/LinearAlgebra/Orientation.lean,Mathlib/RingTheory/HahnSeries.lean,Mathlib/RingTheory/LaurentSeries.lean,Mathlib/Tactic/Positivity/Core.lean,Mathlib/Topology/Algebra/WithZeroTopology.lean 18 39 ['Vierkantor', 'astrainfinita', 'digama0', 'eric-wieser', 'j-loreaux', 'leanprover-bot'] nobody
660-49748
1 year ago
905-2490
905 days ago
13-18399
13 days
6491 eric-wieser
author:eric-wieser
 chore(Mathlib/Algebra/Hom/GroupAction): add `SMulHomClass.comp_smul` --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-algebra
label:t-algebra$
 24/10 Mathlib/Algebra/Hom/GroupAction.lean 1 0 [] nobody
660-49748
1 year ago
932-35748
932 days ago
83-76369
83 days
7076 grunweg
author:grunweg
 feat: define measure zero subsets of a manifold A topological manifold has no canonical measure, but there is a canonical notion of measure zero subsets. We show that these are closed under subsets and countable unions (hence define a filter, the almost everywhere filter) and that a closed nowhere dense has empty interior. This is necessary for stating the general version of Sard's theorem (in finite dimensions), and a first step towards its proof. This code was written at LftCM 2023. Thanks for @fpvandoorn for mentoring me! :heart: --- Unresolved questions/looking for feedback - Is "measure zero" a good name or would "null set" be better? I tend towards the former, but welcome input from a measure theorist (which I'm not). - What is the correct definition? One could also define "measure zero" using any `IsOpenPosMeasure` on the charted space. I think all results in this file still hold then, but for applications (e.g., Sard's theorem), this might be too general. - define custom notation, similar to the a.e. filter on a measure space? (We could include $J$ instead of $\mu$.) - what's the right syntax for formulas in docstrings --- use LaTeX or backticks? I don't know how to preview the generated docs, the guidelines are a bit ambiguous for me. merge-conflict WIP t-differential-geometry t-measure-probability 165/0 Mathlib.lean,Mathlib/Geometry/Manifold/MeasureZero.lean,docs/references.bib 3 27 ['ADedecker', 'github-actions', 'grunweg', 'mo271', 'sgouezel'] ADedecker
assignee:ADedecker
660-49748
1 year ago
815-47057
815 days ago
43-56110
43 days
3757 thorimur
author:thorimur
 feat: config options for `fail_if_no_progress` This PR creates config options for `fail_if_no_progress` that allow the user to tweak what exactly counts as "progress". This includes whether to use defeq or `BEq`, what transparency to use, and which parts of the goal and local context to check. It also splits off the comparison functionality into `Mathlib.Lean.Meta.Compare`, which provides fully configurable comparison functions for common complex metaprogramming types not specific to `fail_if_no_progress`. These types are `Expr`, `LocalDecl`, `LocalContext`, `MetavarDecl`, `MVarId`, and `List MVarId`. --- See [zulip](https://leanprover.zulipchat.com/#narrow/stream/287929-mathlib4/topic/progress.20on.20fail_if_no_progress) for a couple review questions. Status update: this PR is now basically done, save for some extra tests which should probably be included. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict WIP t-meta 603/54 Mathlib.lean,Mathlib/Lean/Meta.lean,Mathlib/Lean/Meta/Compare.lean,Mathlib/Tactic/FailIfNoProgress.lean,test/fail_if_no_progress.lean 5 38 ['alexjbest', 'github-actions', 'joneugster', 'kim-em', 'thorimur'] nobody
660-49747
1 year ago
1117-14429
1117 days ago
0-15
15 seconds
12353 thorimur
author:thorimur
 feat: `conv%` This PR introduces `conv% e => tac`, along with `simp%`, `norm_num%`, and `push_neg%`, which are defined in terms of `conv%`. It also introduces `conv%?` (and `simp%?`, `norm_num%?`, and `push_neg%?`) as shortcuts for `show_term ...`. This is a relatively straightforward refactor of code already present in the implementation of `#conv`, and otherwise relies entirely on simple macros. This PR also introduces some modifications to existing command syntax for `#conv`, `#simp`, and `#norm_num`: * The syntax for `#conv` was `#conv tac => e`; however, this is inconsistent with the tactic syntax, and so this has been flipped to `#conv e => tac`. Likewise, `conv%` uses the same (new) syntax `conv% e => tac`. * `#simp` and `#norm_num` separated their config and `only` syntax from the expression by an optional `=>` (for `#simp`) and an optional `:` (for `#norm_num`) (e.g. `#simp only [lem] => e`). These have both been replaced with an optional`on` (e.g. `#simp only [lem] on e`) which is also used for `simp%` and `norm_num%`. Although `#whnf` is implemented in terms of `#conv`, this PR doesn't introduce `whnf%` in the same way, as that's probably better off being implemented directly instead of through `conv`. --- WIP: needs tests. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict WIP t-meta 131/32 Mathlib/Tactic/Conv.lean,Mathlib/Tactic/NormNum/Core.lean,Mathlib/Tactic/PushNeg.lean,docs/Conv/Guide.lean 4 0 [] nobody
656-26057
1 year ago
759-64099
759 days ago
0-17
17 seconds
13852 FR-vdash-bot
author:FR-vdash-bot
 perf: skip some typeclasses in TC search --- - [ ] depends on: #7873 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict slow-typeclass-synthesis blocked-by-other-PR 45/33 Mathlib/Algebra/Group/Defs.lean,Mathlib/Algebra/Ring/Defs.lean,Mathlib/RingTheory/Norm.lean 3 21 ['MichaelStollBayreuth', 'astrainfinita', 'github-actions', 'leanprover-bot', 'leanprover-community-mathlib4-bot'] nobody
656-19737
1 year ago
unknown
0-0
0 seconds
7903 urkud
author:urkud
 feat: define `UnboundedSpace` --- The new instances generate some timeouts, and I don't understand why. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict help-wanted t-topology 111/59 Mathlib/Analysis/BoxIntegral/Basic.lean,Mathlib/Analysis/Normed/Module/Basic.lean,Mathlib/Topology/Bornology/Basic.lean,Mathlib/Topology/Bornology/Constructions.lean,Mathlib/Topology/MetricSpace/Bounded.lean,Mathlib/Topology/MetricSpace/GromovHausdorffRealized.lean 6 1 ['github-actions'] nobody
653-37726
1 year ago
unknown
0-0
0 seconds
15679 adomani
author:adomani
 test: refactor in CI --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict WIP 213/5 .github/workflows/bors.yml,.github/workflows/build.yml,.github/workflows/build.yml.in,.github/workflows/build_fork.yml,Mathlib.lean,Mathlib/Algebra/Homology/HomotopyCategory/SingleFunctors.lean,Mathlib/AlgebraicGeometry/EllipticCurve/Affine.lean,Mathlib/Analysis/CStarAlgebra/ContinuousFunctionalCalculus/Order.lean,Mathlib/Analysis/CStarAlgebra/ContinuousFunctionalCalculus/Unique.lean,Mathlib/Analysis/Convex/Combination.lean,Mathlib/Analysis/Convex/Segment.lean,Mathlib/CategoryTheory/Bicategory/Adjunction.lean,Mathlib/CategoryTheory/Monoidal/Braided/Basic.lean,Mathlib/CategoryTheory/Monoidal/Center.lean,Mathlib/GroupTheory/Coxeter/Matrix.lean,Mathlib/Order/Filter/Cocardinal.lean,Mathlib/Order/UpperLower/Basic.lean,Mathlib/TestRefactor.lean,Refactor/Main.lean,lakefile.lean,lean-toolchain 21 1 ['github-actions'] nobody
648-6902
1 year ago
650-16344
650 days ago
0-8
8 seconds
7565 shuxuezhuyi
author:shuxuezhuyi
 feat(Topology/Algebra/Order): extend homeomorphism of `Ioo` to `Icc` We extend the homeomorphisms between open intervals to homeomorphisms between the closed intervals. --- - [ ] depends on: #7018 - [ ] depends on: #7351 - [ ] depends on: #7564 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-topology blocked-by-other-PR t-order 389/5 Mathlib.lean,Mathlib/Data/Set/Intervals/Image.lean,Mathlib/Order/Directed.lean,Mathlib/Topology/Algebra/Order/IccExtendFromIoo.lean,Mathlib/Topology/Algebra/Order/IntermediateValue.lean 5 1 ['leanprover-community-mathlib4-bot'] nobody
646-43402
1 year ago
958-24281
958 days ago
0-222
3 minutes
10629 madvorak
author:madvorak
 feat: List.cons_sublist_append_iff_right --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-data 11/0 Mathlib/Data/List/Basic.lean 1 1 ['eric-wieser'] nobody
646-43293
1 year ago
772-52130
772 days ago
53-73442
53 days
9973 Ruben-VandeVelde
author:Ruben-VandeVelde
 feat: polynomials formed by lists From https://github.com/leanprover-community/mathlib/pull/15476 --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) please-adopt merge-conflict t-data 311/0 Mathlib.lean,Mathlib/Data/Polynomial/OfList.lean 2 0 [] nobody
646-42826
1 year ago
unknown
0-0
0 seconds
12926 joelriou
author:joelriou
 feat(CategoryTheory): the monoidal category structure induced by a monoidal functor In this PR, given a monoidal functor `F : MonoidalFunctor C D`, we define a monoidal category structure on the category `InducedCategory D F.obj`, which has the "same" objects as `C`, but the morphisms between `X` and `Y` identify to `F.obj X ⟶ F.obj Y`. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict WIP t-category-theory 105/0 Mathlib.lean,Mathlib/CategoryTheory/Monoidal/Induced.lean 2 3 ['eric-wieser', 'github-actions', 'joelriou'] nobody
646-41225
1 year ago
737-46430
737 days ago
0-10
10 seconds
12869 adomani
author:adomani
 feat: linter and script for `theorem` vs `lemma` This PR contains a linter for flagging doc-string-less `theorem`s, as well as a bash script that, once the linter ran on Mathlib, automatically replaces every linter-offending `theorem` by `lemma`. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-linter awaiting-author 106/0 Mathlib.lean,Mathlib/Tactic.lean,Mathlib/Tactic/Linter/ThmLemma.lean,scripts/thmLemma.sh 4 13 ['adomani', 'github-actions', 'grunweg', 'joneugster'] nobody
646-27989
1 year ago
700-48484
700 days ago
38-16364
38 days
14563 awueth
author:awueth
 feat: if-then-else of exclusive or statement --- If `¬(P ∧ Q)` then `ite (P ∨ Q) a 1 = (ite P a 1) * (ite Q a 1)` [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) awaiting-author t-algebra new-contributor
label:t-algebra$
 5/0 Mathlib/Algebra/Group/Basic.lean 1 3 ['eric-wieser', 'github-actions', 'kim-em'] nobody
645-42141
1 year ago
676-2723
676 days ago
6-38745
6 days
14308 grhkm21
author:grhkm21
 feat(Algebra/Category): Direct construction of colimits in algebraic categories (Below I only write about colimits since that's what I'm familiar with after working on it the last few days, but maybe it's the same for other categorical constructions) **Main feature:** Construct colimits in `AddCommGrp`/`ModuleCat`/`FGModuleCat`(/...) directly as coequalizer (i.e. cokernel i.e. quotient) of two maps, allowing one to say $\coprod_j M_j \cong *$ Currently, if you look at how colimits are constructed for [AddCommGrp](https://github.com/leanprover-community/mathlib4/blob/master/Mathlib/Algebra/Category/Grp/Colimits.lean#L69-L92), you see this massive block of code of all relations generating the quotient relation, but that's kind of bad, you can't say anything concretely about it. Also as noted in the TODOs of a few files: ``` TODO: In fact, in `ModuleCat R` there is a much nicer model of colimits as quotients of finitely supported functions, and we really should implement this as well. ``` I wrote it down [here](https://leanprover.zulipchat.com/#narrow/stream/287929-mathlib4/topic/Braided.20left.20rigid.20categories.20are.20right.20rigid/near/447490672), and **have formalised it** in a small file already [here](https://gist.github.com/grhkm21/5b2d938753c0ce0900d21c93a39e3b7d#file-addcommgrpcolimits-lean-L162-L163) (I also have a `ModuleCat` version, and proving existence of colimits in `FGModuleCat` from it). Usually I will try to merge the file into Mathlib directly (preferably in one sitting), but I have been trying for a while now and been struggling. One issue is I am struggling to understand universes, which I asked [here](https://leanprover.zulipchat.com/#narrow/stream/113489-new-members/topic/Universe.20constraints!/near/448049266) along with many other places. A more concrete issue is that - [ ] FGModuleCat (and `FullSubcategory` in general) requires morphism and objects to be on the same universe, whereas generally `Category.{v, u}` don't. So that seems to limit what I can express, and maybe I have to fix it first. Here are a few more TODOs just so I don't forget, probably done before the one above: - [ ] Generalise `cokernelIsoQuotient` to other categories. - [ ] Also prove `coproductIsoDirectSum` - [ ] Also prove coequalizer (f + h) (g + h) ~ coequalizer f g ~ cokernel (f - g) 0 - [ ] Fix typo `FGModuleCatCat` If anyone is familiar with universe stuff and can answer my many questions that'll be great too. I need help understanding just [these five lines](https://github.com/leanprover-community/mathlib4/blob/master/Mathlib/Algebra/Category/Grp/Colimits.lean#L267-L271) merge-conflict WIP t-algebra
label:t-algebra$
 10/3 Mathlib/Algebra/DirectSum/Module.lean,Mathlib/LinearAlgebra/FreeModule/Basic.lean 2 1 ['github-actions'] nobody
645-40010
1 year ago
690-74687
690 days ago
0-23
23 seconds
13010 ADedecker
author:ADedecker
 feat: relax universe constraint in stoneCechExtend --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-topology 33/3 Mathlib/Topology/StoneCech.lean 1 2 ['ADedecker', 'erdOne'] nobody
645-39807
1 year ago
unknown
0-0
0 seconds
12411 adomani
author:adomani
 feat: more linting of cdots --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-linter 953/617 Archive/Wiedijk100Theorems/CubingACube.lean,Mathlib.lean,Mathlib/Algebra/Category/GroupCat/Colimits.lean,Mathlib/Algebra/Homology/Exact.lean,Mathlib/Algebra/Homology/LocalCohomology.lean,Mathlib/Algebra/Lie/Nilpotent.lean,Mathlib/Algebra/Module/PID.lean,Mathlib/Algebra/Module/Submodule/Bilinear.lean,Mathlib/Algebra/Module/Torsion.lean,Mathlib/Algebra/MonoidAlgebra/Basic.lean,Mathlib/Algebra/Order/Archimedean.lean,Mathlib/AlgebraicGeometry/StructureSheaf.lean,Mathlib/Analysis/Analytic/Composition.lean,Mathlib/Analysis/Calculus/Deriv/Slope.lean,Mathlib/Analysis/Calculus/InverseFunctionTheorem/ApproximatesLinearOn.lean,Mathlib/Analysis/Calculus/LocalExtr/Basic.lean,Mathlib/Analysis/Calculus/TangentCone.lean,Mathlib/Analysis/InnerProductSpace/Basic.lean,Mathlib/Analysis/InnerProductSpace/Projection.lean,Mathlib/Analysis/MeanInequalitiesPow.lean,Mathlib/Analysis/Normed/Group/ControlledClosure.lean,Mathlib/Analysis/Normed/Group/Pointwise.lean,Mathlib/Analysis/NormedSpace/FiniteDimension.lean,Mathlib/Analysis/NormedSpace/HahnBanach/Separation.lean,Mathlib/Analysis/NormedSpace/Multilinear/Basic.lean,Mathlib/Analysis/NormedSpace/Star/Basic.lean,Mathlib/Analysis/NormedSpace/Star/Multiplier.lean,Mathlib/Analysis/NormedSpace/lpSpace.lean,Mathlib/Analysis/PSeries.lean,Mathlib/Analysis/RCLike/Basic.lean,Mathlib/Analysis/SpecialFunctions/Complex/Arg.lean,Mathlib/Analysis/SpecialFunctions/Log/Base.lean,Mathlib/Analysis/SpecialFunctions/Log/Monotone.lean,Mathlib/Analysis/SpecialFunctions/Pow/NNReal.lean,Mathlib/Analysis/SpecialFunctions/Pow/Real.lean,Mathlib/Analysis/SpecificLimits/Normed.lean,Mathlib/CategoryTheory/Abelian/Basic.lean,Mathlib/CategoryTheory/Action.lean,Mathlib/CategoryTheory/Bicategory/NaturalTransformation.lean,Mathlib/CategoryTheory/Category/Cat/Limit.lean,Mathlib/CategoryTheory/Category/PartialFun.lean,Mathlib/CategoryTheory/Category/TwoP.lean,Mathlib/CategoryTheory/Closed/Cartesian.lean,Mathlib/CategoryTheory/Functor/Flat.lean,Mathlib/CategoryTheory/Galois/GaloisObjects.lean,Mathlib/CategoryTheory/Limits/Over.lean,Mathlib/CategoryTheory/Limits/VanKampen.lean,Mathlib/CategoryTheory/Localization/Predicate.lean,Mathlib/CategoryTheory/Monad/Coequalizer.lean,Mathlib/CategoryTheory/Monad/Monadicity.lean,Mathlib/CategoryTheory/Pi/Basic.lean,Mathlib/CategoryTheory/Sites/DenseSubsite.lean,Mathlib/CategoryTheory/Sites/InducedTopology.lean,Mathlib/CategoryTheory/Subobject/Lattice.lean,Mathlib/Combinatorics/Additive/PluenneckeRuzsa.lean,Mathlib/Combinatorics/HalesJewett.lean,Mathlib/Combinatorics/SimpleGraph/Regularity/Chunk.lean,Mathlib/Computability/Reduce.lean,Mathlib/Data/Holor.lean,Mathlib/Data/Nat/Multiplicity.lean,Mathlib/Data/Nat/Pairing.lean,Mathlib/Data/Real/Cardinality.lean,Mathlib/Data/Real/Hyperreal.lean,Mathlib/Data/Real/Irrational.lean,Mathlib/Data/Set/Card.lean,Mathlib/Dynamics/Circle/RotationNumber/TranslationNumber.lean,Mathlib/FieldTheory/Finite/Polynomial.lean,Mathlib/FieldTheory/Minpoly/IsIntegrallyClosed.lean,Mathlib/FieldTheory/PerfectClosure.lean,Mathlib/FieldTheory/RatFunc.lean,Mathlib/Geometry/RingedSpace/OpenImmersion.lean,Mathlib/Geometry/RingedSpace/PresheafedSpace/Gluing.lean,Mathlib/GroupTheory/GroupAction/Quotient.lean,Mathlib/GroupTheory/Nilpotent.lean,Mathlib/GroupTheory/Perm/Cycle/Factors.lean,Mathlib/GroupTheory/Perm/Finite.lean,Mathlib/GroupTheory/SpecificGroups/Quaternion.lean,Mathlib/GroupTheory/Sylow.lean,Mathlib/LinearAlgebra/Dimension/RankNullity.lean,Mathlib/LinearAlgebra/Dual.lean,Mathlib/LinearAlgebra/LinearIndependent.lean,Mathlib/LinearAlgebra/LinearPMap.lean,Mathlib/LinearAlgebra/Matrix/Charpoly/Coeff.lean,Mathlib/LinearAlgebra/Prod.lean,Mathlib/LinearAlgebra/QuadraticForm/Complex.lean,Mathlib/LinearAlgebra/Reflection.lean,Mathlib/MeasureTheory/Constructions/Pi.lean,Mathlib/MeasureTheory/Covering/VitaliFamily.lean,Mathlib/MeasureTheory/Measure/Haar/Basic.lean,Mathlib/MeasureTheory/Measure/MeasureSpace.lean,Mathlib/MeasureTheory/Measure/Typeclasses.lean,Mathlib/MeasureTheory/OuterMeasure/Basic.lean,Mathlib/ModelTheory/Skolem.lean,Mathlib/NumberTheory/Dioph.lean,Mathlib/NumberTheory/LegendreSymbol/Basic.lean,Mathlib/NumberTheory/Padics/Hensel.lean,Mathlib/NumberTheory/Padics/PadicNumbers.lean,Mathlib/NumberTheory/Padics/RingHoms.lean,Mathlib/NumberTheory/RamificationInertia.lean,Mathlib/RingTheory/AdjoinRoot.lean 147 2 ['adomani', 'leanprover-bot'] nobody
645-39670
1 year ago
unknown
0-0
0 seconds
12279 casavaca
author:casavaca
 WIP: feat: Holder's inequality n-ary --- - [x] depends on #12291 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict WIP t-analysis 129/0 Mathlib/Analysis/MeanInequalities.lean,Mathlib/Analysis/SpecialFunctions/Pow/Real.lean 2 13 ['github-actions'] nobody
645-39655
1 year ago
762-14360
762 days ago
0-50185
13 hours
12093 ADedecker
author:ADedecker
 feat: tweak the definition of semicontinuity to behave better in nonlinear orders Summary of the changes: - change definitions to make [lowerSemicontinuous_iff_isClosed_preimage](https://leanprover-community.github.io/mathlib4_docs/Mathlib/Topology/Semicontinuous.html#lowerSemicontinuous_iff_isClosed_preimage) true without assuming `LinearOrder`, so that semicontinuity corresponds to continuity for lower/upper order topology on the codomain. See discussion on [Zulip](https://leanprover.zulipchat.com/#narrow/stream/116395-maths/topic/Semicontinuity.20definition.20for.20non-linear.20orders/near/432898278) - add new `iff` lemmas for unfolding the definition - add `iff` lemmas with the old definition in the linearly ordered case - some basic lemmas need to be changed in an easy way - minimize assumptions for continuity => semicontinuity - prove the semicontinuity criterion for indicators using "preimage of Ici/Iic" instead of a direct proof, because the proof is more natural (especially because we have no `filter_upwards` for `Frequently`) - in the rest of the file (which is about linear orders anyway), we don't touch the statements and just rewrite to the old definition. Some of these could be generalized, but we keep that for a later PR. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict WIP t-topology 274/130 Mathlib/Analysis/BoundedVariation.lean,Mathlib/MeasureTheory/Integral/FundThmCalculus.lean,Mathlib/Order/Filter/Basic.lean,Mathlib/Topology/Semicontinuous.lean 4 0 [] nobody
645-39617
1 year ago
unknown
0-0
0 seconds
11520 thorimur
author:thorimur
 feat: `linting_rules` and deprecated syntax --- Experimental. WIP. Might not be performance-viable. - [ ] depends on: #11519 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict blocked-by-other-PR t-meta 1016/0 Mathlib.lean,Mathlib/Command/Linter.lean,Mathlib/Command/Linter/Deprecated.lean,Mathlib/Command/Linter/LintingRules.lean,Mathlib/Command/SyntaxRules.lean,Mathlib/Command/SyntaxRules/Attr.lean,Mathlib/Command/SyntaxRules/Elab.lean,Mathlib/Command/SyntaxRules/Header.lean,Mathlib/Command/SyntaxRules/Util.lean,Mathlib/Tactic/Common.lean,scripts/noshake.json 11 11 ['leanprover-bot', 'leanprover-community-mathlib4-bot', 'thorimur'] nobody
645-39607
1 year ago
unknown
0-0
0 seconds
11519 thorimur
author:thorimur
 feat: `syntax_rules` --- Experimental. WIP. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-meta 485/0 Mathlib.lean,Mathlib/Command/SyntaxRules.lean,Mathlib/Command/SyntaxRules/Attr.lean,Mathlib/Command/SyntaxRules/Elab.lean,Mathlib/Command/SyntaxRules/Header.lean,Mathlib/Command/SyntaxRules/Util.lean,scripts/noshake.json 7 0 [] nobody
645-39593
1 year ago
unknown
0-0
0 seconds
11393 mcdoll
author:mcdoll
 feat(Analysis/Distribution/SchwartzSpace): The Heine-Borel property --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict WIP t-analysis 688/3 Mathlib.lean,Mathlib/Analysis/Distribution/SchwartzSpace.lean,Mathlib/Topology/Constructions.lean,Mathlib/Topology/UniformSpace/Ascoli.lean,Mathlib/Topology/UniformSpace/Pi.lean,Mathlib/Topology/UniformSpace/UniformConvergenceTopology.lean 6 0 [] nobody
645-39583
1 year ago
unknown
0-0
0 seconds
9444 erdOne
author:erdOne
 feat: Various instances regarding `𝓞 K`. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict help-wanted t-number-theory 27/0 Mathlib/NumberTheory/NumberField/Basic.lean,Mathlib/RingTheory/IntegralClosure.lean 2 9 ['erdOne', 'leanprover-bot', 'mattrobball', 'riccardobrasca', 'xroblot'] nobody
645-39502
1 year ago
867-38929
867 days ago
1-62292
1 day
8931 hmonroe
author:hmonroe
 feat(Computable): define P, NP, and NP-complete Revised to focus on languages that are binary strings, given the issue of non-acceptable encodings of unspecified Types --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-computability awaiting-author 381/5 Mathlib.lean,Mathlib/Computability/Complexity copy.lean,Mathlib/Computability/Complexity.lean,Mathlib/Computability/Encoding.lean,Mathlib/Computability/TMComputable.lean,Mathlib/Computability/TuringMachine.lean,Mathlib/Computability/halting example.lean,docs/references.bib 8 3 ['fpvandoorn', 'github-actions', 'hmonroe'] nobody
645-39467
1 year ago
801-48849
801 days ago
93-64275
93 days
10641 newell
author:newell
 feat(Topology/MetricSpace/WellSpaced): Define sets that are *well-spaced*. Create a new file `Mathlib.Topology.MetricSpace.WellSpaced` that contains definitions of sets which are in some sense *well-spaced*. Some examples are Delone and Meyer sets, which find applications in Quasicrystals and Coding Theory, among others. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-topology 1073/14 Mathlib.lean,Mathlib/Analysis/LocallyConvex/WithSeminorms.lean,Mathlib/Topology/EMetricSpace/Basic.lean,Mathlib/Topology/GMetric/Basic.lean,Mathlib/Topology/GMetric/GInfSep.lean,Mathlib/Topology/GMetric/WellSpaced.lean,Mathlib/Topology/GPseudoMetric/Basic.lean,Mathlib/Topology/MetricSpace/WellSpaced.lean 8 1 ['edegeltje'] nobody
645-39435
1 year ago
unknown
0-0
0 seconds
10387 adomani
author:adomani
 feat(Tactic/ComputeDegree): add `polynomial` tactic Introducing the `polynomial` tactic, summing up `compute_degree, monicity` and adding support for `leadingCoeff`. This is more of a proof of concept: if there is interest in this tactic, I can polish it up. See [this Zulip discussion](https://leanprover.zulipchat.com/#narrow/stream/113489-new-members/topic/Compute.20roots.20of.20polynomials/near/420713624). --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) WIP RFC t-meta 24/0 Mathlib/Tactic/ComputeDegree.lean 1 0 [] nobody
645-39289
1 year ago
689-22319
689 days ago
143-73801
143 days
9154 FR-vdash-bot
author:FR-vdash-bot
 feat: `npow` / `nsmul` / `Nat.cast`/ `zpow` / `zsmul` implemented using `Nat.binaryRec` --- - [ ] depends on: https://github.com/leanprover/lean4/pull/3756 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict awaiting-author t-algebra blocked-by-other-PR
label:t-algebra$
 168/359 Mathlib/Algebra/Group/Defs.lean,Mathlib/Computability/PartrecCode.lean,Mathlib/Computability/Primrec.lean,Mathlib/Data/Bool/Basic.lean,Mathlib/Data/Int/Bitwise.lean,Mathlib/Data/Nat/Bits.lean,Mathlib/Data/Nat/Bitwise.lean,Mathlib/Data/Nat/Digits.lean,Mathlib/Data/Nat/EvenOddRec.lean,Mathlib/Data/Nat/Fib/Basic.lean,Mathlib/Data/Nat/Multiplicity.lean,Mathlib/Data/Nat/Order/Basic.lean,Mathlib/Data/Nat/Parity.lean,Mathlib/Data/Nat/Size.lean,Mathlib/Data/Num/Lemmas.lean,Mathlib/Init/Data/Nat/Bitwise.lean,Mathlib/LinearAlgebra/TensorProduct/Graded/Internal.lean,Mathlib/Logic/Basic.lean,Mathlib/Logic/Denumerable.lean,Mathlib/Logic/Encodable/Basic.lean,Mathlib/Logic/Equiv/Basic.lean,Mathlib/Logic/Equiv/Nat.lean,lake-manifest.json,lakefile.lean,test/zmod.lean 25 7 ['astrainfinita', 'eric-wieser', 'kim-em', 'leanprover-community-mathlib4-bot'] nobody
645-39080
1 year ago
unknown
0-0
0 seconds
6603 tydeu
author:tydeu
 feat: automatically try `cache get` before build --- A quick proof-of-concept. With this, `lake build` will always try `cache get` before building mathlib. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict WIP CI 29/0 lakefile.lean 1 3 ['kim-em', 'tydeu'] nobody
645-39054
1 year ago
999-55577
999 days ago
11-2031
11 days
6058 apurvnakade
author:apurvnakade
 feat: duality theory for cone programs This PR tracks the development of duality theory for cone programs. [Reference](https://ti.inf.ethz.ch/ew/courses/ApproxSDP09/notes/conelp.pdf) --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) - [x] depends on: #6059 - [ ] define direct sum of cones - [ ] weak duality - [ ] regular duality - [ ] slater condition - [ ] strong duality merge-conflict WIP t-analysis 159/0 Mathlib.lean,Mathlib/Analysis/Convex/Cone/ConeLinearProgram.lean 2 1 ['leanprover-community-mathlib4-bot'] nobody
645-38999
1 year ago
1034-75907
1034 days ago
0-9
9 seconds
6449 ADedecker
author:ADedecker
 feat: functions with finite fibers --- This has been discussed before on [Zulip](https://leanprover.zulipchat.com/#narrow/stream/217875-Is-there-code-for-X.3F/topic/.E2.9C.94.20Cofinite.20maps.3F) and it came up again while working with @kkytola's student. As explained in the docstring, we could absolutely just use `Tendsto f cofinite cofinite` all the time, but (1) we lack some API for it (2) the API is nicer to setup if we have a separate def (e.g for dot notation) and (3) mentioning filters for such a simple concept is really not beginner-friendly. I'm not sure at all about the name. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict awaiting-author t-topology 203/0 Mathlib.lean,Mathlib/Logic/Function/HasFiniteFibers.lean,Mathlib/Order/Filter/Basic.lean,Mathlib/Order/Filter/Cofinite.lean 4 14 ['ADedecker', 'YaelDillies', 'alexjbest', 'kkytola'] nobody
645-38993
1 year ago
1011-37047
1011 days ago
6-70040
6 days
8100 digama0
author:digama0
 feat: add support for other types in norm_num --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-meta 177/12 Mathlib/Tactic/NormNum/Basic.lean,Mathlib/Tactic/NormNum/Eq.lean,Mathlib/Tactic/NormNum/Ineq.lean,Mathlib/Tactic/NormNum/Pow.lean,Mathlib/Tactic/NormNum/Result.lean,Mathlib/Tactic/NormNum/Structural.lean,test/norm_num.lean 7 4 ['dwrensha'] nobody
645-38861
1 year ago
unknown
0-0
0 seconds
13163 erdOne
author:erdOne
 feat(.vscode/module-docstring.code-snippet): Prevent auto-complete from firing on `do` --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) awaiting-author t-meta 5/0 .vscode/module-docstring.code-snippets 1 5 ['erdOne', 'grunweg', 'robertylewis', 'trivial1711'] nobody
645-37603
1 year ago
677-51795
677 days ago
50-78405
50 days
15585 FR-vdash-bot
author:FR-vdash-bot
 test make `HasQuotient.quotient'` reducible --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-algebra
label:t-algebra$
 8/1 Mathlib/Algebra/Quotient.lean,Mathlib/GroupTheory/Coset.lean 2 1 ['github-actions'] nobody
643-71269
1 year ago
unknown
0-0
0 seconds
15586 astrainfinita
author:astrainfinita
 test make `HasQuotient` out put a `setoid` --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-algebra
label:t-algebra$
 22/36 Mathlib/Algebra/Lie/CartanExists.lean,Mathlib/Algebra/Lie/Quotient.lean,Mathlib/Algebra/Lie/Weights/Basic.lean,Mathlib/Algebra/Quotient.lean,Mathlib/Analysis/Normed/Group/AddCircle.lean,Mathlib/GroupTheory/Commensurable.lean,Mathlib/GroupTheory/Coset.lean,Mathlib/GroupTheory/CosetCover.lean,Mathlib/GroupTheory/GroupAction/Quotient.lean,Mathlib/GroupTheory/Nilpotent.lean,Mathlib/GroupTheory/QuotientGroup.lean,Mathlib/LinearAlgebra/Quotient.lean,Mathlib/RingTheory/Ideal/Quotient.lean,Mathlib/Topology/Algebra/UniformRing.lean 14 5 ['astrainfinita', 'github-actions', 'leanprover-bot'] nobody
643-71269
1 year ago
unknown
0-0
0 seconds
13791 digama0
author:digama0
 refactor: Primrec and Partrec General cleanup of the `Primrec` and `Partrec` files, to better adjust to lean 4 things. The main user-visible change is that `Primrec₂` is no longer a `def` but an `abbrev`, because it was causing inference issues in lean 4. I also removed all the nonterminal `simp`s in `PartrecCode.lean`. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-computability tech debt 585/778 Mathlib/Computability/Ackermann.lean,Mathlib/Computability/Halting.lean,Mathlib/Computability/Partrec.lean,Mathlib/Computability/PartrecCode.lean,Mathlib/Computability/Primrec.lean 5 2 ['github-actions', 'grunweg'] nobody
642-6138
1 year ago
705-82124
705 days ago
1-84718
1 day
11964 adamtopaz
author:adamtopaz
 feat: The functor of points of a scheme We construct the functor of points functor, and prove that it's full and faithful. --- - [x] depends on: #11947 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-algebraic-geometry t-category-theory 210/0 Mathlib.lean,Mathlib/AlgebraicGeometry/FunctorOfPoints.lean,Mathlib/AlgebraicGeometry/OpenImmersion.lean 3 4 ['github-actions', 'grunweg'] nobody
642-5997
1 year ago
770-22938
770 days ago
0-1223
20 minutes
12418 rosborn
author:rosborn
 style: replace preimage_val with ↓∩ notation --- This is a rough draft of what the new `↓∩` notation would look like within mathlib. I believe this is an improvement in clarity and would like to have `↓∩` as a standard notation (along with `''`, `⁻¹'`, `↑`, etc...). As `↓∩` is specialized for `Set`s, I have only changed `preimage_val` when the left-hand side of `↓∩` is a `Set`. The introduction of the `↓∩` notation to Data.Set.Image is temporary as it isn't possible to import Data.Set.Subset directly. If we want `↓∩` unscoped, where would be the best place to define it? An option is Data.Set.Defs, but the notation cannot be defined without additional imports as the file does not import `notation3`. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict 56/61 Mathlib/Analysis/InnerProductSpace/Projection.lean,Mathlib/Data/Set/Function.lean,Mathlib/Data/Set/Image.lean,Mathlib/Data/Set/Subset.lean,Mathlib/MeasureTheory/Constructions/Polish.lean,Mathlib/MeasureTheory/MeasurableSpace/Basic.lean,Mathlib/MeasureTheory/Measure/Restrict.lean,Mathlib/Order/UpperLower/Basic.lean,Mathlib/Topology/Bases.lean,Mathlib/Topology/Clopen.lean,Mathlib/Topology/Connected/Basic.lean,Mathlib/Topology/Connected/PathConnected.lean,Mathlib/Topology/Constructions.lean,Mathlib/Topology/ContinuousOn.lean,Mathlib/Topology/LocalAtTarget.lean,Mathlib/Topology/LocallyConstant/Basic.lean,Mathlib/Topology/Separation.lean,Mathlib/Topology/Sober.lean 18 3 ['grunweg', 'rosborn'] nobody
642-5896
1 year ago
728-15880
728 days ago
29-50022
29 days
9978 FR-vdash-bot
author:FR-vdash-bot
 chore(FieldTheory/KummerExtension): move some lemmas earlier --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict awaiting-author t-algebra
label:t-algebra$
 197/177 Mathlib.lean,Mathlib/Data/Polynomial/FieldDivision.lean,Mathlib/FieldTheory/KummerExtension.lean,Mathlib/RingTheory/AdjoinRoot.lean,Mathlib/RingTheory/Polynomial/Irreducible.lean 5 5 ['alreadydone', 'grunweg', 'riccardobrasca'] nobody
642-5688
1 year ago
839-86270
839 days ago
8-83342
8 days
12429 adomani
author:adomani
 feat: toND -- auto-generating natDegree This is an experiment to automatically translate theorems about `degree` to theorems about `natDegree`. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra RFC merge-conflict awaiting-author t-meta
label:t-algebra$
 167/132 Mathlib.lean,Mathlib/Algebra/Polynomial/Degree/Definitions.lean,Mathlib/Algebra/Polynomial/Degree/Lemmas.lean,Mathlib/Algebra/Polynomial/EraseLead.lean,Mathlib/Algebra/Polynomial/HasseDeriv.lean,Mathlib/Algebra/Polynomial/Inductions.lean,Mathlib/Algebra/Polynomial/Mirror.lean,Mathlib/Algebra/Polynomial/Reverse.lean,Mathlib/Tactic.lean,Mathlib/Tactic/ToNatDegree.lean,scripts/noshake.json 11 2 ['adomani', 'grunweg'] nobody
642-4999
1 year ago
753-39072
753 days ago
3-76602
3 days
15823 eric-wieser
author:eric-wieser
 Quotients of rings in model theory --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-logic 55/13 Mathlib/ModelTheory/Algebra/Ring/FreeCommRing.lean,Mathlib/ModelTheory/Syntax.lean 2 1 ['github-actions'] nobody
641-69962
1 year ago
unknown
0-0
0 seconds
12178 joneugster
author:joneugster
 feat(Data/Matrix/Basic): add notation for `m×n`-Matrices Introduce the notation `Mat[m,n][R]` for `Matrix (Fin m) (Fin n) R`. [Zulip thread](https://leanprover.zulipchat.com/#narrow/stream/287929-mathlib4/topic/Why.20does.20.60Matrix.2Erow.60.20use.20.20.60Unit.60.20instead.20of.20.60Fin.201.60.3F/near/427949223) --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-algebra
label:t-algebra$
 139/135 Mathlib/Algebra/Lie/CartanMatrix.lean,Mathlib/Analysis/Complex/UpperHalfPlane/Basic.lean,Mathlib/Data/Matrix/Basic.lean,Mathlib/Data/Matrix/Notation.lean,Mathlib/Data/Matrix/Rank.lean,Mathlib/Data/Matrix/Reflection.lean,Mathlib/GroupTheory/Coxeter/Matrix.lean,Mathlib/LinearAlgebra/Matrix/Adjugate.lean,Mathlib/LinearAlgebra/Matrix/Charpoly/Coeff.lean,Mathlib/LinearAlgebra/Matrix/Determinant.lean,Mathlib/LinearAlgebra/Matrix/SpecialLinearGroup.lean,Mathlib/LinearAlgebra/Matrix/Trace.lean,Mathlib/LinearAlgebra/Matrix/Transvection.lean,Mathlib/LinearAlgebra/PID.lean,Mathlib/LinearAlgebra/Vandermonde.lean,Mathlib/NumberTheory/Modular.lean,Mathlib/NumberTheory/ModularForms/CongruenceSubgroups.lean,Mathlib/NumberTheory/ModularForms/SlashActions.lean,Mathlib/NumberTheory/ModularForms/SlashInvariantForms.lean,Mathlib/NumberTheory/RamificationInertia.lean,Mathlib/RingTheory/SimpleModule.lean,test/matrix.lean 22 9 ['YaelDillies', 'eric-wieser', 'grunweg', 'joneugster'] nobody
641-47086
1 year ago
760-37479
760 days ago
5-76679
5 days
12751 Command-Master
author:Command-Master
 feat: add lemmas for Nat/Bits, Nat/Bitwise and Nat/Size Remove `@[simp]` from `Nat.bit_false` and `Nat.bit_true`, as `bit0` and `bit1` are deprecated, and add some lemmas to `Bits`, `Bitwise` and `Size`. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-data new-contributor 66/7 Mathlib/Data/Nat/Bits.lean,Mathlib/Data/Nat/Bitwise.lean,Mathlib/Data/Nat/Multiplicity.lean,Mathlib/Data/Nat/Size.lean 4 26 ['Command-Master', 'Rida-Hamadani', 'Ruben-VandeVelde', 'YaelDillies', 'github-actions', 'jcommelin'] nobody
641-27050
1 year ago
676-33272
676 days ago
56-40668
56 days
15448 urkud
author:urkud
 chore(*): deprecate `Option.elim'` Use `Option.elim` instead. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict awaiting-author tech debt 54/50 Mathlib/Algebra/BigOperators/Option.lean,Mathlib/Algebra/MvPolynomial/Equiv.lean,Mathlib/Algebra/MvPolynomial/Variables.lean,Mathlib/Analysis/BoxIntegral/Partition/Additive.lean,Mathlib/Analysis/BoxIntegral/Partition/Basic.lean,Mathlib/Analysis/BoxIntegral/Partition/Split.lean,Mathlib/Analysis/Calculus/LagrangeMultipliers.lean,Mathlib/CategoryTheory/Category/PartialFun.lean,Mathlib/Computability/TMToPartrec.lean,Mathlib/Data/Option/Defs.lean,Mathlib/LinearAlgebra/Basis.lean,Mathlib/Logic/Embedding/Set.lean,Mathlib/Logic/Equiv/Basic.lean,Mathlib/MeasureTheory/OuterMeasure/Induced.lean,Mathlib/NumberTheory/Dioph.lean,Mathlib/Topology/Compactness/Paracompact.lean,Mathlib/Topology/LocallyFinite.lean 17 12 ['Ruben-VandeVelde', 'YaelDillies', 'github-actions', 'grunweg', 'urkud'] nobody
641-16103
1 year ago
650-62265
650 days ago
7-18420
7 days
10350 Shamrock-Frost
author:Shamrock-Frost
 feat(Data/Setoid): add the operations of taking the equivalence class of an element and of saturating a set wrt an equivalence relation I'm open to suggestions about changing the name "saturate", someone on zulip rightly pointed out this is a very overloaded term in math. That said, I think it's unlikely to cause confusion and that there's only one reasonable interpretation in the context of setoids. --- - [x] depends on: #10347 - [x] depends on: #10348 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-data 169/3 Mathlib/Data/Setoid/Basic.lean,Mathlib/Data/Setoid/Partition.lean,Mathlib/Order/Closure.lean 3 1 ['leanprover-community-mathlib4-bot'] nobody
639-29324
1 year ago
758-20952
758 days ago
19-74546
19 days
13573 Shamrock-Frost
author:Shamrock-Frost
 feat: add multivariate polynomial modules Add a type synonym for multivariate polynomials with coefficients in a module. --- Multivariate polynomials with module coefficients are sort of silly, but they sometimes show up in commutative algebra (eg in the definition of a quasi regular sequence). Writing this code involved a lot of copy and pasting from `PolynomialModule` and `MvPolynomial`. The API is definitely lacking at this stage but it's a start. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict awaiting-author t-algebra
label:t-algebra$
 691/6 Mathlib.lean,Mathlib/Algebra/MvPolynomial/Module/Basic.lean,Mathlib/Algebra/MvPolynomial/Module/MvAEval.lean,Mathlib/Algebra/Polynomial/Module/Basic.lean 4 9 ['Shamrock-Frost', 'erdOne', 'github-actions'] nobody
639-29304
1 year ago
675-21672
675 days ago
39-72752
39 days
6517 MohanadAhmed
author:MohanadAhmed
 feat: discrete Fourier transform of a finite sequence # Discrete Fourier Transform (DFT) Matrix and DFT of a (finite) sequence This file defines the `dft` opertaion on a sequence (also a vecotr) and the DFT operation matrix ## Main definitions - `dft v`: given a sequence (v : (Fin n) → ℂ) we can transform it into a sequence (V : (Fin n) →ℂ) such that $$V [p] = ∑_{k = 0}^{N - 1} e^{-j*2πkp/n} v [k]$$ - `idft V` : given a sequence (V : (Fin n) → ℂ) we can transform it into a sequence (v : (Fin n) → ℂ) such that $$v [k] = \frac{1}{N}∑_{p = 0}^{n - 1} e^{j*2πkp/N} v [p]$$ - `dftMatrix n` : the dft matrix of dimensions $n \times n$ with the `k, p` entry equal to $$Wₙ[k, p] = e^{-j2πkp/n}$$ - `(dftMatrix n)⁻¹` : the idft matrix of dimensions $n \times n$ with the `k, p` entry equal to $$Wₙ[k, p] = (1/N) e^{j2πkp/n}$$ ## Main results - `dft v = (dftMatrix n) v` : the dft operation on a sequence is the same as the dft matrix applied to the vector - `idft V = (dftMatrix n)⁻¹ V` : the idft operation on a sequence is the same as the idft matrix applied to the vector - `dft (idft v) = dft ( idft v) = v` the dft and idft operations are inverses - `Wₙ = vandermonde (w)` : the dft matrix is vandermonde with `w` being the first row of the dft matrix - `circulant t = (dftMatrix n)⁻¹ ⬝ diagonal (dft t) ⬝ (dftMatrix n)` : a circulant matrix is diagonalizable by the dft and idft matrix pair. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict awaiting-author t-algebra
label:t-algebra$
 294/0 Mathlib.lean,Mathlib/LinearAlgebra/Matrix/DFT.lean 2 26 ['MohanadAhmed', 'ericrbg'] nobody
639-29142
1 year ago
948-53358
948 days ago
65-20427
65 days
13155 alreadydone
author:alreadydone
 feat(NumberTheory/EllipticDivisibilitySequence): show elliptic relations follow from even-odd recursion This PR is centered around the (generalized) elliptic relations (`rel₄`) $E(a,b,c,d): W_{a+b}W_{a-b}W_{c+d}W_{c-d}=W_{a+c}W_{a-c}W_{b+d}W_{b-d}-W_{a+d}W_{a-d}W_{b+c}W_{b-c}$. For an integer-indexed sequence W valued in a commutative ring, the relation makes sense only when a,b,c,d are all integers or all half integers. For convenience of formalization, we instead consider integers a,b,c,d of the same parity and divide all subscripts by 2. We extract the subexpression $W_{(a+b)/2}W_{(a-b)/2}$ (which appear six times) as `addMulSub W a b`. The collection of all $E(a,b,c,d)$ is equivalent to Stange's axiom for elliptic nets (`net`), and the literature (e.g. Silverman) commonly consider only the three-index special case $E(m,n,r,0)$ (`Rel₃`). Important special cases of these relations are (i) $E(m+1,m,1,0): W_{2m+1}W_1^3=W_{m+2}W_m^3-W_{m+1}^3 W_{m-1}$ (`oddRec`) and (ii) $E(m+1,m-1,1,0): W_{2m}W_2 W_1^2=W_m(W_{m+2}W_{m-1}^2-W_{m-2}W_{m+1}^2)$ (`evenRec`), which suffice to uniquely specify $W$ on all positive integers recursively from four initial values $W_1, W_2, W_3, W_4$ (`IsEllSequence.ext`, if $W_1 W_2$ is not a zero divisor). In the usual setting where $W_1=1$ and $W_2\mid W_4$, there does exist a sequence (`normEDS`) satisfying (i) and (ii) given initial values $W_2, W_3$ and $W_4/W_2$. It turns out the same non-zerodivisor condition also guarantees that W is an odd function with $W_0=0$, which naturally extends W to all integers. The main result of this PR (`rel₄_of_oddRec_evenRec`, `IsEllSequence.of_oddRec_evenRec`) is a purely algebraic proof that the sequence W defined by the single-parameter elliptic relations (i) and (ii) implies all $E(a,b,c,d)$, based on my original argument first published on [Math.SE](https://math.stackexchange.com/a/4903422/12932). It's based on the observation that a nonzerodivisor-multiple of $E(a,b,c,d)$ can be expressed as a linear combination of various $E(a,b,c_\min,d_\min)$ with the two smallest indices fixed at their minimal possible values, which can be transformed (`transf`) to an elliptic relation with smaller `a` (which can be assumed to hold by induction), unless they are of the form (i) or (ii) which hold by assumption. For this argument it's necessary to assume `a > b > c > d ≥ 0` (see `StrictAnti₄` and `Rel₄OfValid`), but it's easy to extend to arbitrary a,b,c,d by symmetry properties of `rel₄` under negation and permutations of indices. In the subsequent PR #13057, we show all normalized EDSs (`normEDS`), defined using the even-odd recursion (i)-(ii), are elliptic (i.e. satisfy the elliptic relations) divisibility sequences. This PR doesn't directly apply because a normEDS doesn't always satisfy the nonzerodivisor condition, but they are specializations of the universal normEDS, which does satisfy the condition. The technique of reducing to the universal case will be applied many times, and relies on the naturality (`map`) lemmas. We also change the `ℕ` in the definition `IsDivSequence` to `ℤ` which is more natural given that W is a `ℤ`-indexed sequence. --- - [x] depends on: #13153 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-algebra awaiting-author t-number-theory
label:t-algebra$
 565/12 Mathlib/NumberTheory/EllipticDivisibilitySequence.lean 1 55 ['Multramate', 'alreadydone', 'github-actions', 'grunweg', 'leanprover-community-mathlib4-bot'] nobody
633-42746
1 year ago
682-44633
682 days ago
26-39367
26 days
15600 adomani
author:adomani
 feat: lint also `let` vs `have` --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict WIP t-linter 77/26 Mathlib/Tactic/Linter/HaveLetLinter.lean,test/HaveLetLinter.lean 2 1 ['github-actions'] nobody
632-11022
1 year ago
653-4720
653 days ago
0-8
8 seconds
16253 Shreyas4991
author:Shreyas4991
 feat: Basics of Discrete Fair Division in Mathlib This PR adds the basics of discrete fair division in mathlib. We include the definitions of allocations, valuations, properties of valuations, and the following notions : Envy-Freeness (EF), Envy-Freeness upto 1 good (EF1), and envy freeness upto any good (EFX). We also include the various implications between these notions. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) WIP awaiting-author 144/0 Mathlib/GameTheory/FairDivision/Discrete/Basic.lean 1 9 ['Shreyas4991', 'eric-wieser', 'github-actions'] nobody
631-8935
1 year ago
631-13196
631 days ago
0-20853
5 hours
13970 adomani
author:adomani
 feat: a linter to flag unnecessary uses of `nolint simpNF` --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-linter awaiting-author 230/0 Mathlib.lean,Mathlib/Analysis/CStarAlgebra/Basic.lean,Mathlib/Analysis/Quaternion.lean,Mathlib/CategoryTheory/Comma/Arrow.lean,Mathlib/CategoryTheory/Monoidal/End.lean,Mathlib/Data/NNRat/Defs.lean,Mathlib/Data/Rat/Defs.lean,Mathlib/LinearAlgebra/CliffordAlgebra/Even.lean,Mathlib/LinearAlgebra/CliffordAlgebra/EvenEquiv.lean,Mathlib/Tactic.lean,Mathlib/Tactic/Linter.lean,Mathlib/Tactic/Linter/UnnecessarySyntax.lean,test/UnnecessarySyntax.lean 13 4 ['adomani', 'github-actions', 'grunweg', 'leanprover-bot'] nobody
630-34236
1 year ago
unknown
0-0
0 seconds
15162 adomani
author:adomani
 feat: checkAsSorry linter A very preliminary version of the `checkAsSorry` linter. It flags declarations whose type is not equal to the 'asSorry'ed one. [Zulip discussion](https://leanprover.zulipchat.com/#narrow/stream/287929-mathlib4/topic/Running.20Mathlib.20under.20.60set_option.20debug.2EbyAsSorry.60) --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-linter 119/0 Mathlib.lean,Mathlib/Tactic.lean,Mathlib/Tactic/Linter/CheckAsSorry.lean,test/CheckAsSorry.lean 4 1 ['github-actions'] nobody
630-33224
1 year ago
unknown
0-0
0 seconds
14669 Command-Master
author:Command-Master
 feat(Data/Nat/PartENat): add lemmas for PartENat Add some missing lemmas for `PartENat`, as well as the additive homomorphism from it to `WithTop Int`. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) awaiting-author t-data new-contributor merge-conflict 90/0 Mathlib/Data/Nat/PartENat.lean 1 4 ['erdOne', 'github-actions', 'mathlib-merge-conflicts', 'urkud'] nobody
628-38940
1 year ago
679-46462
679 days ago
0-6775
1 hour
15121 Eloitor
author:Eloitor
 feat: iff theorems for IsSplitEpi and IsSplitMono in opposite category --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) awaiting-author t-category-theory new-contributor 40/0 Mathlib/CategoryTheory/EpiMono.lean 1 3 ['github-actions', 'joelriou', 'mattrobball'] nobody
628-1885
1 year ago
659-47544
659 days ago
7-3203
7 days
15895 madvorak
author:madvorak
 feat(Computability/ContextFreeGrammar): mapping between two types of nonterminal symbols --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-computability WIP 172/0 Mathlib/Computability/ContextFreeGrammar.lean 1 43 ['YaelDillies', 'github-actions', 'madvorak'] nobody
627-18678
1 year ago
631-52187
631 days ago
1-43047
1 day
14038 adomani
author:adomani
 test/decl diff in lean dev --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict WIP 231/2 .github/workflows/bors.yml,.github/workflows/build.yml,.github/workflows/build.yml.in,.github/workflows/build_fork.yml,.github/workflows/mk_build_yml.sh,Mathlib/Tactic/Eval.lean,scripts/decls_diff_hybrid.sh,scripts/list_decls.lean 8 3 ['github-actions'] nobody
626-26738
1 year ago
698-83257
698 days ago
0-8
8 seconds
14046 adomani
author:adomani
 test: diff of declarations in lean --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict WIP 231/2 .github/workflows/bors.yml,.github/workflows/build.yml,.github/workflows/build.yml.in,.github/workflows/build_fork.yml,.github/workflows/mk_build_yml.sh,Mathlib/Tactic/Eval.lean,scripts/decls_diff_hybrid.sh,scripts/list_decls.lean 8 2 ['github-actions'] nobody
626-26738
1 year ago
unknown
0-0
0 seconds
12107 yuma-mizuno
author:yuma-mizuno
 feat(Mathlib/Tactic/Widget/StringDiagram): support 2-morphisms in bicategories --- - [x] depends on: #11080 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-category-theory t-meta 1158/0 Mathlib.lean,Mathlib/Tactic.lean,Mathlib/Tactic/CategoryTheory/Coherence.lean,Mathlib/Tactic/Widget/StringDiagram.lean,scripts/noshake.json,test/StringDiagram.lean,widget/src/penrose/monoidal.dsl,widget/src/penrose/monoidal.sty 8 2 ['github-actions', 'mathlib4-dependent-issues-bot'] nobody
621-21482
1 year ago
unknown
0-0
0 seconds
15925 yuma-mizuno
author:yuma-mizuno
 feat(CategoryTheory/Monoida): proof producing coherence tactic --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-category-theory t-meta 5018/265 Mathlib.lean,Mathlib/CategoryTheory/Bicategory/Adjunction.lean,Mathlib/CategoryTheory/Bicategory/Kan/Adjunction.lean,Mathlib/CategoryTheory/Monoidal/Braided/Basic.lean,Mathlib/CategoryTheory/Monoidal/CoherenceLemmas.lean,Mathlib/CategoryTheory/Monoidal/Opposite.lean,Mathlib/CategoryTheory/Monoidal/Rigid/Basic.lean,Mathlib/CategoryTheory/Monoidal/Rigid/Braided.lean,Mathlib/Tactic.lean,Mathlib/Tactic/CategoryTheory/BicategoricalComp.lean,Mathlib/Tactic/CategoryTheory/Bicategory/Normalize.lean,Mathlib/Tactic/CategoryTheory/Bicategory/PureCoherence.lean,Mathlib/Tactic/CategoryTheory/Coherence.lean,Mathlib/Tactic/CategoryTheory/Coherence/Basic.lean,Mathlib/Tactic/CategoryTheory/Coherence/Datatypes.lean,Mathlib/Tactic/CategoryTheory/Coherence/Normalize.lean,Mathlib/Tactic/CategoryTheory/Coherence/PureCoherence.lean,Mathlib/Tactic/CategoryTheory/CoherenceNew.lean,Mathlib/Tactic/CategoryTheory/Monoidal.lean,Mathlib/Tactic/CategoryTheory/Monoidal/Basic.lean,Mathlib/Tactic/CategoryTheory/Monoidal/Datatypes.lean,Mathlib/Tactic/CategoryTheory/Monoidal/Normalize.lean,Mathlib/Tactic/CategoryTheory/Monoidal/PureCoherence.lean,Mathlib/Tactic/CategoryTheory/MonoidalComp.lean,Mathlib/Tactic/Widget/StringDiagram.lean,lake-manifest.json,scripts/noshake.json,test/CategoryTheory/Bicategory.lean,test/CategoryTheory/Coherence.lean,test/CategoryTheory/CoherenceNew.lean,test/CategoryTheory/Monoidal.lean,test/CategoryTheory/Monoidal/Basic.lean,test/CategoryTheory/Monoidal/Normalize.lean,test/CategoryTheory/MonoidalComp.lean,test/StringDiagram.lean 35 1 ['github-actions'] nobody
620-68019
1 year ago
unknown
0-0
0 seconds
7861 shuxuezhuyi
author:shuxuezhuyi
 feat(Geometry/Hyperbolic/UpperHalfPlane): instance IsometricSMul PSL(2, ℝ) ℍ --- - [ ] depends on: #7835 - [ ] depends on: #7791 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict blocked-by-other-PR t-euclidean-geometry 98/0 Mathlib.lean,Mathlib/Geometry/Hyperbolic/UpperHalfPlane/Basic.lean,Mathlib/LinearAlgebra/Matrix/ProjectiveSpecialLinearGroup.lean 3 1 ['leanprover-community-mathlib4-bot'] nobody
620-49079
1 year ago
681-3207
681 days ago
43-50453
43 days
16570 yuma-mizuno
author:yuma-mizuno
 chore(Tactic/CategoryTheory): change `TermElabM` to `MetaM` Separated from #15335. To use `Qq`, we need to modify `Qq` to support universe matching. See [Zulip](https://leanprover.zulipchat.com/#narrow/stream/144837-PR-reviews/topic/.2315335.20meta.20code.20for.20monoidal.20categories). --- - [ ] depends on: #15335 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) WIP t-meta 26/15 Mathlib/Tactic/CategoryTheory/BicategoryCoherence.lean,Mathlib/Tactic/CategoryTheory/Coherence.lean 2 3 ['github-actions', 'mathlib4-dependent-issues-bot', 'mergify'] nobody
620-25544
1 year ago
unknown
0-0
0 seconds
6475 joneugster
author:joneugster
 refactor(LinearAlgebra/Span): replace ∙ with • as notation for `span R {x}` Change the notation for `Submodule.span R {x}` from `R ∙ x` to the bullet `R • x`, which is also used for scalar multiplication. --- (this was an experiment originating from a [Zulip discussion](https://leanprover.zulipchat.com/#narrow/stream/270676-lean4/topic/.2E.C2.B7.E2.AC.9D.20.5Brant.5D), I don't have a clear opinion if this is actually a desired thing to do...) Generally this works and Lean seems to do fine figuring out the difference between `r • x` and `R • x` (The former is scalar multiplication in an `R`-module `M`, the latter is the `Submodule R M` generated by `x`). Encountered a few regressions that should be considered (the first two might be also bugs that could be looked at independently): 1. `(· • ·)`, and general simple function syntax, does not work as notation for `HSMul.hSMul` anymore. For this reason, I introduced the notation `scoped` to minimise the effect of this. Now it's only a problem if you `open Span`. Note that `fun x₁ x₂ ↦ x₁ • x₂` works flawlessly all the time. 4. `change` and `convert` have troubles to deal with the two competing notations. `have := _; convert this` works. 5. `R • x - y` is not valid anymore and needs parentheses: `R • (x - y)`. I do think this actually helps readability, so I don't mind. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-algebra RFC
label:t-algebra$
 323/240 Mathlib/Algebra/Algebra/Operations.lean,Mathlib/Algebra/Algebra/Subalgebra/Basic.lean,Mathlib/Algebra/Lie/Engel.lean,Mathlib/Algebra/Lie/Normalizer.lean,Mathlib/Algebra/Module/PID.lean,Mathlib/Algebra/Module/Torsion.lean,Mathlib/Analysis/InnerProductSpace/Basic.lean,Mathlib/Analysis/InnerProductSpace/GramSchmidtOrtho.lean,Mathlib/Analysis/InnerProductSpace/Orthogonal.lean,Mathlib/Analysis/InnerProductSpace/PiL2.lean,Mathlib/Analysis/InnerProductSpace/Projection.lean,Mathlib/Analysis/InnerProductSpace/TwoDim.lean,Mathlib/Analysis/NormedSpace/ContinuousLinearMap.lean,Mathlib/Analysis/NormedSpace/HahnBanach/Extension.lean,Mathlib/Analysis/NormedSpace/OperatorNorm.lean,Mathlib/Data/ZMod/Quotient.lean,Mathlib/Geometry/Euclidean/Angle/Oriented/Basic.lean,Mathlib/Geometry/Euclidean/Inversion/Calculus.lean,Mathlib/Geometry/Euclidean/MongePoint.lean,Mathlib/Geometry/Euclidean/PerpBisector.lean,Mathlib/Geometry/Euclidean/Sphere/SecondInter.lean,Mathlib/Geometry/Manifold/Instances/Sphere.lean,Mathlib/LinearAlgebra/AffineSpace/AffineSubspace.lean,Mathlib/LinearAlgebra/AffineSpace/FiniteDimensional.lean,Mathlib/LinearAlgebra/BilinearForm.lean,Mathlib/LinearAlgebra/DFinsupp.lean,Mathlib/LinearAlgebra/Dimension.lean,Mathlib/LinearAlgebra/FiniteDimensional.lean,Mathlib/LinearAlgebra/LinearIndependent.lean,Mathlib/LinearAlgebra/LinearPMap.lean,Mathlib/LinearAlgebra/ProjectiveSpace/Basic.lean,Mathlib/LinearAlgebra/QuadraticForm/Basic.lean,Mathlib/LinearAlgebra/Quotient.lean,Mathlib/LinearAlgebra/SesquilinearForm.lean,Mathlib/LinearAlgebra/Span.lean,Mathlib/MeasureTheory/Integral/Periodic.lean,Mathlib/RingTheory/Coprime/Ideal.lean,Mathlib/RingTheory/Finiteness.lean,Mathlib/RingTheory/Ideal/AssociatedPrime.lean,Mathlib/RingTheory/Ideal/IdempotentFG.lean,Mathlib/RingTheory/Noetherian.lean,Mathlib/Topology/Instances/AddCircle.lean 42 3 ['eric-wieser', 'joneugster', 'leanprover-bot'] nobody
619-46375
1 year ago
unknown
0-0
0 seconds
10591 adri326
author:adri326
 feat(Topology/Algebra/ConstMulAction): properties of continuous actions in Hausdorff spaces Defines some useful properties of `ContinuousConstSMul` group actions on Hausdorff spaces: - `MulAction.isClosed_fixedBy`, which proves that the `fixedBy α m` set is closed - `t2_separation_smul`, which constructs an open set `s` such that `s` and `g • s` are disjoint - `Set.InjOn.t2_separation_smul`, the extension of `t2_separation_smul` to a set of group elements whose action is injective --- This PR belongs my series of PR around the formalization of Rubin's theorem. `MulAction.isClosed_fixedBy` is used in several places along the proof, and the separation lemmas are primarily used in showing that `(fixedBy α g)ᶜ` and `(fixedBy α h)ᶜ` are disjoint under some intricate but fully group-theoretic condition. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-topology awaiting-author t-algebra
label:t-algebra$
 57/0 Mathlib/Topology/Algebra/ConstMulAction.lean 1 9 ['ADedecker', 'adri326', 'j-loreaux', 'jcommelin'] ADedecker
assignee:ADedecker
619-17536
1 year ago
771-30278
771 days ago
55-82204
55 days
7545 shuxuezhuyi
author:shuxuezhuyi
 feat: APIs of `Function.extend f g e'` when `f` is injective We characterizes `range g`, `Injective g`, `Surjective g` and `Bijective g` in terms of `extend f g e'`.​ --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict awaiting-author t-logic 50/0 Mathlib.lean,Mathlib/Logic/Function/ApiForExtend.lean 2 1 ['fpvandoorn'] nobody
618-61911
1 year ago
927-9693
927 days ago
32-32325
32 days
16658 adomani
author:adomani
 add tips file --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict WIP awaiting-author test-ci 51/508 .github/build.in.yml,.github/workflows/bors.yml,.github/workflows/build.yml,.github/workflows/build_fork.yml,scripts/Tips.lean 5 1 ['github-actions'] nobody
615-4444
1 year ago
unknown
0-0
0 seconds
14078 Ruben-VandeVelde
author:Ruben-VandeVelde
 feat(CI): continue after mk_all fails --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict awaiting-author CI 43/0 .github/workflows/bors.yml,.github/workflows/build.yml,.github/workflows/build.yml.in,.github/workflows/build_fork.yml,Mathlib/Data/Nat/Test.lean 5 2 ['bryangingechen', 'github-actions'] nobody
614-71144
1 year ago
697-37704
697 days ago
0-13311
3 hours
11283 hmonroe
author:hmonroe
 feat(ModelTheory/Satisfiability): define theory with independent sentence --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict WIP t-logic 8/0 Mathlib/ModelTheory/Satisfiability.lean 1 2 ['fpvandoorn', 'hmonroe'] nobody
612-41698
1 year ago
799-15368
799 days ago
3-63452
3 days
16914 siddhartha-gadgil
author:siddhartha-gadgil
 Loogle syntax with non-reserved This is PR mainly to test that loogle syntax does not break stuff downstream --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict WIP 4/4 lake-manifest.json,lakefile.lean 2 1 ['github-actions'] nobody
610-30307
1 year ago
611-27396
611 days ago
0-14835
4 hours
13782 alreadydone
author:alreadydone
 feat(EllipticCurve): ZSMul formula in terms of division polynomials The formula $[n]P = (\phi_n(x,y) : \omega_n(x,y) : \psi_n(x,y))$ in Jacobian coordinates for $P=(x,y)$ a nonsingular point on a Weierstrass/elliptic curve. --- - [x] depends on: #12883 - [x] depends on: #13399 - [ ] depends on: #13057 - [ ] depends on: #13155 - [x] depends on: #13845 - [x] depends on: #13846 - [ ] depends on: #13847 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra t-number-theory blocked-by-other-PR merge-conflict t-algebraic-geometry
label:t-algebra$
 2462/232 Mathlib.lean,Mathlib/Algebra/MvPolynomial/PDeriv.lean,Mathlib/Algebra/Polynomial/Bivariate.lean,Mathlib/AlgebraicGeometry/EllipticCurve/Affine.lean,Mathlib/AlgebraicGeometry/EllipticCurve/DivisionPolynomial/Basic.lean,Mathlib/AlgebraicGeometry/EllipticCurve/DivisionPolynomial/ZSMul.lean,Mathlib/AlgebraicGeometry/EllipticCurve/Group.lean,Mathlib/AlgebraicGeometry/EllipticCurve/Jacobian.lean,Mathlib/AlgebraicGeometry/EllipticCurve/Universal.lean,Mathlib/NumberTheory/EllipticDivisibilitySequence.lean 10 8 ['Multramate', 'alreadydone', 'github-actions', 'leanprover-community-mathlib4-bot'] nobody
607-79672
1 year ago
unknown
0-0
0 seconds
8118 iwilare
author:iwilare
 feat(CategoryTheory): add dinatural transformations A starting point to define [dinatural transformations](https://ncatlab.org/nlab/show/dinatural+transformation). This is my first PR so style comments and improvements are very welcome! --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict awaiting-author t-category-theory 147/7 Mathlib.lean,Mathlib/CategoryTheory/DinatTrans.lean,Mathlib/CategoryTheory/Functor/Category.lean,Mathlib/CategoryTheory/Products/Bifunctor.lean 4 49 ['Shamrock-Frost', 'github-actions', 'iwilare', 'joelriou'] Shamrock-Frost
assignee:Shamrock-Frost
605-52593
1 year ago
709-33070
709 days ago
21-30729
21 days
14242 js2357
author:js2357
 feat: Prove equivalence of `isDedekindDomain` and `isDedekindDomainDvr` Prove that `isDedekindDomainDvr` is equivalent to both `isDedekindDomain` and `isDedekindDomainInv`. Specifically, prove `isDedekindDomainDvr A → isDedekindDomainInv A`, because `isDedekindDomain A → isDedekindDomainDvr A` and `IsDedekindDomain A ↔ IsDedekindDomainInv A` are already in Mathlib. - [x] depends on: #14099 - [x] depends on: #14216 - [ ] depends on: #14237 --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-algebra blocked-by-other-PR new-contributor
label:t-algebra$
 269/1 Mathlib.lean,Mathlib/RingTheory/DedekindDomain/Dvr.lean,Mathlib/RingTheory/FractionalIdeal/LocalizedAtPrime.lean,Mathlib/RingTheory/Localization/Basic.lean 4 2 ['github-actions', 'leanprover-community-mathlib4-bot'] nobody
605-12944
1 year ago
693-1891
693 days ago
0-273
4 minutes
17171 FR-vdash-bot
author:FR-vdash-bot
 test extends carrier and property --- We need https://github.com/leanprover/lean4/issues/2666 ... [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict 433/309 Mathlib/Algebra/Algebra/NonUnitalSubalgebra.lean,Mathlib/Algebra/Algebra/Subalgebra/Basic.lean,Mathlib/Algebra/Algebra/Subalgebra/Directed.lean,Mathlib/Algebra/DirectSum/Decomposition.lean,Mathlib/Algebra/Field/Subfield.lean,Mathlib/Algebra/Group/Subgroup/Basic.lean,Mathlib/Algebra/Group/Subgroup/MulOpposite.lean,Mathlib/Algebra/Group/Submonoid/Basic.lean,Mathlib/Algebra/Group/Submonoid/MulOpposite.lean,Mathlib/Algebra/Group/Submonoid/Pointwise.lean,Mathlib/Algebra/Group/Submonoid/Units.lean,Mathlib/Algebra/Group/Subsemigroup/Basic.lean,Mathlib/Algebra/Group/Subsemigroup/Operations.lean,Mathlib/Algebra/Module/Submodule/Basic.lean,Mathlib/Algebra/Module/Submodule/Lattice.lean,Mathlib/Algebra/Module/Submodule/Map.lean,Mathlib/Algebra/Module/Submodule/Pointwise.lean,Mathlib/Algebra/Ring/Subring/Basic.lean,Mathlib/Algebra/Ring/Subsemiring/Basic.lean,Mathlib/Algebra/Ring/Subsemiring/MulOpposite.lean,Mathlib/Algebra/Ring/Subsemiring/Order.lean,Mathlib/Algebra/Star/Subalgebra.lean,Mathlib/Algebra/Star/Subsemiring.lean,Mathlib/Data/Complex/Module.lean,Mathlib/Data/SetLike/Basic.lean,Mathlib/Deprecated/Subfield.lean,Mathlib/Deprecated/Subgroup.lean,Mathlib/Deprecated/Submonoid.lean,Mathlib/Deprecated/Subring.lean,Mathlib/FieldTheory/IntermediateField/Basic.lean,Mathlib/GroupTheory/ArchimedeanDensely.lean,Mathlib/GroupTheory/DoubleCoset.lean,Mathlib/GroupTheory/Finiteness.lean,Mathlib/GroupTheory/GroupAction/SubMulAction.lean,Mathlib/LinearAlgebra/AffineSpace/AffineSubspace.lean,Mathlib/LinearAlgebra/Span.lean,Mathlib/RingTheory/Ideal/Operations.lean,Mathlib/RingTheory/NonUnitalSubring/Basic.lean,Mathlib/RingTheory/NonUnitalSubsemiring/Basic.lean,Mathlib/SetTheory/Cardinal/Subfield.lean,Mathlib/Topology/Algebra/Algebra.lean,Mathlib/Topology/Algebra/OpenSubgroup.lean 42 1 ['github-actions'] nobody
601-11286
1 year ago
unknown
0-0
0 seconds
7516 ADedecker
author:ADedecker
 perf: use `abbrev` to prevent unifying useless data --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict WIP 4/3 Mathlib/Topology/ContinuousFunction/Bounded.lean 1 3 ['ADedecker', 'leanprover-bot', 'mattrobball'] nobody
599-69346
1 year ago
960-33563
960 days ago
0-16
16 seconds
17127 FR-vdash-bot
author:FR-vdash-bot
 chore: remove global `Quotient.mk` `⟦·⟧` notation --- Merge this PR when we are ready to migrate to `QuotLike` API (#16421). [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-data 137/2 Counterexamples/Pseudoelement.lean,Mathlib/Algebra/Associated/Basic.lean,Mathlib/Algebra/BigOperators/Group/Finset.lean,Mathlib/Algebra/Group/Conj.lean,Mathlib/Algebra/GroupWithZero/NonZeroDivisors.lean,Mathlib/Algebra/Order/CauSeq/Completion.lean,Mathlib/Algebra/Quandle.lean,Mathlib/AlgebraicGeometry/EllipticCurve/Jacobian.lean,Mathlib/AlgebraicGeometry/EllipticCurve/Projective.lean,Mathlib/AlgebraicTopology/FundamentalGroupoid/Basic.lean,Mathlib/AlgebraicTopology/FundamentalGroupoid/FundamentalGroup.lean,Mathlib/AlgebraicTopology/FundamentalGroupoid/InducedMaps.lean,Mathlib/AlgebraicTopology/FundamentalGroupoid/Product.lean,Mathlib/AlgebraicTopology/FundamentalGroupoid/SimplyConnected.lean,Mathlib/CategoryTheory/Abelian/Pseudoelements.lean,Mathlib/CategoryTheory/Limits/Shapes/SingleObj.lean,Mathlib/CategoryTheory/Monoidal/Free/Basic.lean,Mathlib/CategoryTheory/Monoidal/Free/Coherence.lean,Mathlib/CategoryTheory/Skeletal.lean,Mathlib/Data/Finset/Card.lean,Mathlib/Data/Fintype/List.lean,Mathlib/Data/Fintype/Quotient.lean,Mathlib/Data/Multiset/Basic.lean,Mathlib/Data/QPF/Multivariate/Constructions/Fix.lean,Mathlib/Data/QPF/Univariate/Basic.lean,Mathlib/Data/Quot.lean,Mathlib/Data/Real/Basic.lean,Mathlib/Data/Set/Finite.lean,Mathlib/Data/Set/Image.lean,Mathlib/Data/Setoid/Basic.lean,Mathlib/GroupTheory/GroupAction/Basic.lean,Mathlib/GroupTheory/GroupAction/Quotient.lean,Mathlib/LinearAlgebra/Dual.lean,Mathlib/LinearAlgebra/Ray.lean,Mathlib/Logic/Encodable/Basic.lean,Mathlib/Logic/Equiv/Basic.lean,Mathlib/ModelTheory/DirectLimit.lean,Mathlib/ModelTheory/Fraisse.lean,Mathlib/ModelTheory/Quotients.lean,Mathlib/NumberTheory/NumberField/CanonicalEmbedding/FundamentalCone.lean,Mathlib/NumberTheory/NumberField/Embeddings.lean,Mathlib/NumberTheory/NumberField/Units/DirichletTheorem.lean,Mathlib/NumberTheory/Padics/PadicIntegers.lean,Mathlib/NumberTheory/Padics/PadicNumbers.lean,Mathlib/Order/RelIso/Basic.lean,Mathlib/RepresentationTheory/Action/Concrete.lean,Mathlib/SetTheory/Cardinal/Basic.lean,Mathlib/SetTheory/Cardinal/Ordinal.lean,Mathlib/SetTheory/Game/Basic.lean,Mathlib/SetTheory/Game/Birthday.lean,Mathlib/SetTheory/Game/Impartial.lean,Mathlib/SetTheory/Game/Ordinal.lean,Mathlib/SetTheory/Game/State.lean,Mathlib/SetTheory/Lists.lean,Mathlib/SetTheory/Ordinal/Arithmetic.lean,Mathlib/SetTheory/Ordinal/Basic.lean,Mathlib/SetTheory/Surreal/Basic.lean,Mathlib/SetTheory/Surreal/Dyadic.lean,Mathlib/SetTheory/Surreal/Multiplication.lean,Mathlib/SetTheory/ZFC/Basic.lean,Mathlib/SetTheory/ZFC/Rank.lean,Mathlib/Topology/Connected/PathConnected.lean,Mathlib/Topology/Homotopy/HomotopyGroup.lean,Mathlib/Topology/Homotopy/Path.lean,Mathlib/Topology/Homotopy/Product.lean,Mathlib/Topology/MetricSpace/GromovHausdorff.lean,Mathlib/Topology/UniformSpace/Separation.lean,test/interactiveUnfold.lean 68 1 ['github-actions'] nobody
599-64389
1 year ago
599-64389
599 days ago
4-72805
4 days
16887 metinersin
author:metinersin
 feat(ModelTheory/Complexity): define conjunctive and disjunctive formulas Defines `FirstOrder.Language.BoundedFormula.IsConjunctive` and `FirstOrder.Language.BoundedFormula.IsDisjunctive`. --- - [ ] depends on: #16885 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict blocked-by-other-PR new-contributor t-logic 300/7 Mathlib/ModelTheory/Complexity.lean,Mathlib/ModelTheory/Equivalence.lean,Mathlib/ModelTheory/Syntax.lean 3 2 ['github-actions', 'mathlib4-dependent-issues-bot'] nobody
597-8922
1 year ago
612-36996
612 days ago
0-1299
21 minutes
16888 metinersin
author:metinersin
 feat(ModelTheory/Complexity): Define conjunctive and disjunctive normal forms Define `FirstOrder.Language.BoundedFormula.IsDNF` and `FirstOrder.Language.BoundedFormula.IsCNF`. --- - [ ] depends on: #16887 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict blocked-by-other-PR new-contributor t-logic 415/7 Mathlib/ModelTheory/Complexity.lean,Mathlib/ModelTheory/Equivalence.lean,Mathlib/ModelTheory/Syntax.lean 3 2 ['github-actions', 'mathlib4-dependent-issues-bot'] nobody
597-8922
1 year ago
612-36997
612 days ago
0-1045
17 minutes
16889 metinersin
author:metinersin
 feat(ModelTheory/Complexity): Normal forms Defines `FirstOrder.Language.BoundedFormula.toDNF` and `FirstOrder.Language.BoundedFormula.toCNF` - given a quantifier-free formula, these construct a semantically equivalent formula in disjunctive normal form and conjunctive normal form, respectively. --- - [ ] depends on: #16888 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict blocked-by-other-PR new-contributor t-logic 525/7 Mathlib/ModelTheory/Complexity.lean,Mathlib/ModelTheory/Equivalence.lean,Mathlib/ModelTheory/Syntax.lean 3 2 ['github-actions', 'mathlib4-dependent-issues-bot'] nobody
597-8921
1 year ago
612-32747
612 days ago
0-613
10 minutes
5995 FR-vdash-bot
author:FR-vdash-bot
 feat: add APIs about `Quotient.choice` Some docs in this PR refer to the definition in #5576. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict awaiting-author RFC t-data 76/6 Mathlib/Data/Quot.lean 1 3 ['YaelDillies', 'astrainfinita', 'gebner'] eric-wieser
assignee:eric-wieser
590-23131
1 year ago
715-43792
715 days ago
285-35716
285 days
14619 Command-Master
author:Command-Master
 chore: Merge `Trunc` to `Squash` Remove `Trunc` and use `Squash` instead --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict WIP new-contributor 197/211 Mathlib/CategoryTheory/EpiMono.lean,Mathlib/CategoryTheory/Preadditive/Biproducts.lean,Mathlib/Data/DFinsupp/Basic.lean,Mathlib/Data/Fintype/Basic.lean,Mathlib/Data/Fintype/Card.lean,Mathlib/Data/Fintype/Option.lean,Mathlib/Data/Fintype/Perm.lean,Mathlib/Data/Fintype/Quotient.lean,Mathlib/Data/Quot.lean,Mathlib/Data/Semiquot.lean,Mathlib/GroupTheory/Perm/Cycle/Factors.lean,Mathlib/GroupTheory/Perm/Sign.lean,Mathlib/Logic/Equiv/List.lean 13 3 ['Command-Master', 'github-actions', 'vihdzp'] nobody
587-55472
1 year ago
unknown
0-0
0 seconds
13156 erdOne
author:erdOne
 refactor(Algebra/Module/LocalizedModule): Redefine `LocalizedModule` in terms of `OreLocalization`. --- - [x] depends on: #13151 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-algebra
label:t-algebra$
 519/628 Mathlib.lean,Mathlib/Algebra/Module/LocalizedModule.lean,Mathlib/AlgebraicGeometry/Modules/Tilde.lean,Mathlib/RingTheory/DedekindDomain/Different.lean,Mathlib/RingTheory/Localization/BaseChange.lean,Mathlib/RingTheory/OreLocalization/Basic.lean,Mathlib/RingTheory/OreLocalization/Module.lean,Mathlib/RingTheory/OreLocalization/Ring.lean 8 4 ['github-actions', 'leanprover-bot', 'leanprover-community-mathlib4-bot', 'mattrobball'] nobody
585-30271
1 year ago
585-30271
585 days ago
51-84473
51 days
16348 urkud
author:urkud
 refactor(Topology): require `LinearOrder` with `OrderTopology` While the definition formally makes sense for a preorder, this topology is usually not the right one for a non-linear order (e.g., `Real × Real`). See [Zulip thread](https://leanprover.zulipchat.com/#narrow/stream/287929-mathlib4/topic/Open.20Ioi) --- This PR doesn't cleanup any API, I'm going to do it in a later PR. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict awaiting-author t-topology t-order 33/46 Mathlib/Analysis/Asymptotics/SuperpolynomialDecay.lean,Mathlib/Topology/Algebra/Order/LiminfLimsup.lean,Mathlib/Topology/Instances/Sign.lean,Mathlib/Topology/Order/Basic.lean,Mathlib/Topology/Order/Filter.lean,Mathlib/Topology/Order/MonotoneContinuity.lean 6 10 ['YaelDillies', 'github-actions', 'jcommelin', 'urkud'] nobody
585-29895
1 year ago
625-62229
625 days ago
3-83049
3 days
13965 pechersky
author:pechersky
 feat(Data/DigitExpansion): reals via digit expansion are complete --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) - [ ] depends on: #13964 merge-conflict blocked-by-other-PR t-data 3876/0 Mathlib.lean,Mathlib/Data/DigitExpansion/Add.lean,Mathlib/Data/DigitExpansion/Defs.lean,Mathlib/Data/DigitExpansion/Hensel.lean,Mathlib/Data/DigitExpansion/Integer/Basic.lean,Mathlib/Data/DigitExpansion/Integer/Mul.lean,Mathlib/Data/DigitExpansion/Real/Basic.lean,Mathlib/Data/DigitExpansion/Real/CompleteSpace.lean,Mathlib/Data/DigitExpansion/Real/ConditionallyComplete.lean,docs/references.bib 10 4 ['github-actions', 'leanprover-community-mathlib4-bot'] nobody
583-67063
1 year ago
702-13282
702 days ago
0-600
10 minutes
16984 hrmacbeth
author:hrmacbeth
 feat: extend `module` tactic to handle multiple rings, not strictly ordered by inclusion The `module` tactic currently in Mathlib handles scalars from multiple rings, but only if for any two rings `R` and `S` which appear, either `R` is an algebra over `S` or vice versa. This PR extends the tactic by providing a syntax `module T`, which will handle scalars from any ring `R` which `T` is an algebra over. For example, ```lean example : (2:ℤ) • x = (2:ℚ≥0) • x := by module ``` fails since `ℤ` is not a `ℚ≥0`-algebra and `ℚ≥0` is not a `ℤ`-algebra, but ```lean example : (2:ℤ) • x = (2:ℚ≥0) • x := by module ℚ ``` works since `ℚ` is both a `ℤ`-algebra and a `ℚ≥0`-algebra. This PR is a quick proof-of-concept implementation, just to record the desired approach and tactic syntax. It should not be merged as-is. It has with a lot of code duplication and should be rewritten more efficiently (for example, `parse` and `parseEnsuringType` should be merged to a single function, and the `some`/`none` cases in `matchScalarsAux` should be merged to a uniform treatment) before being considered for merging to Mathlib. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-meta 158/35 Mathlib/Tactic/Module.lean,test/module.lean 2 1 ['github-actions'] nobody
581-52335
1 year ago
unknown
0-0
0 seconds
12750 Command-Master
author:Command-Master
 feat: define Gray code --- Define binary reflected gray code, both as a permutation of `Nat` and as a permutation of `BitVec n`, and prove some theorems about them. Additionally, remove `@[simp]` from `Nat.bit_false` and `Nat.bit_true`, as `bit0` and `bit1` are deprecated, and add some lemmas to `Bits`, `Bitwise` and `Size`. - [ ] depends on: #12751 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) blocked-by-other-PR t-data new-contributor merge-conflict awaiting-author 226/0 Mathlib.lean,Mathlib/Data/Nat/Bits.lean,Mathlib/Data/Nat/Bitwise.lean,Mathlib/Data/Nat/GrayCode.lean,Mathlib/Data/Nat/Size.lean 5 5 ['Rida-Hamadani', 'alreadydone', 'github-actions', 'grunweg', 'leanprover-community-mathlib4-bot'] nobody
579-31579
1 year ago
728-13677
728 days ago
16-49744
16 days
12414 adomani
author:adomani
 test: lint and unlint `·` --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict 64/14 Archive/Wiedijk100Theorems/CubingACube.lean,Mathlib/Algebra/Module/Submodule/Bilinear.lean,Mathlib/Tactic/Linter/Multigoal.lean,test/Multigoal.lean 4 4 ['adomani', 'github-actions', 'grunweg', 'leanprover-bot'] nobody
577-28120
1 year ago
unknown
0-0
0 seconds
16647 eric-wieser
author:eric-wieser
 feat: partitions of lists The length of this list is the bell numbers. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-combinatorics t-data 311/0 Mathlib.lean,Mathlib/Data/List/Partition.lean 2 1 ['github-actions'] nobody
574-48594
1 year ago
unknown
0-0
0 seconds
13514 madvorak
author:madvorak
 feat(Computability/ContextFreeGrammar): closure under union - [ ] depends on: #15895 --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-computability blocked-by-other-PR 448/4 Mathlib/Computability/ContextFreeGrammar.lean 1 50 ['Rida-Hamadani', 'YaelDillies', 'github-actions', 'leanprover-community-mathlib4-bot', 'madvorak'] nobody
566-42907
1 year ago
644-16888
644 days ago
72-28417
72 days
5364 thorimur
author:thorimur
 feat: `wlog ... replacing` This allows hypotheses to be removed from the set of generalized hypotheses. E.g. `wlog h : P replacing h'` will remove `h'` from the hypotheses of the type of `this` and from the context of the goal that will suppose `h`. See [zulip](https://leanprover.zulipchat.com/#narrow/stream/287929-mathlib4/topic/wlog.20.2E.2E.2E.20replacing.20.2E.2E.2E.3F). --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-meta 125/18 Mathlib/Tactic/WLOG.lean,test/wlog.lean 2 2 ['thorimur', 'urkud'] nobody
564-75946
1 year ago
unknown
0-0
0 seconds
9654 urkud
author:urkud
 feat: add `@[mk_eq]` version of `@[mk_iff]` The new attribute generates theorems like ```lean List.chain_eq : @List.Chain = fun {α} R a a_1 => a_1 = [] ∨ ∃ b l, R a b ∧ List.Chain R b l ∧ a_1 = b :: l ``` and is useful to rewrite in a theorem that argues about the properties of an unapplied inductive predicate. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict awaiting-author t-meta 63/9 Mathlib/Lean/Meta.lean,Mathlib/Tactic/MkIffOfInductiveProp.lean,test/MkIffOfInductive.lean 3 6 ['Vierkantor', 'github-actions', 'urkud'] nobody
564-75700
1 year ago
836-38999
836 days ago
25-70825
25 days
16704 AntoineChambert-Loir
author:AntoineChambert-Loir
 feat(Mathlib.Data.Ordering.Dickson): Dickson orders Dickson orders are a particular class of well founded orders characterized by the fact that every nonempty set has finitely many minimal elements. They appear in the classical theory of Groebner bases because it is easier to prove that some sets are well founded using this property. WiP. In the `tfae` function, property 2 is exactly `Set.PartiallyWellOrderedOn`, so the PR should be rewritten so as to use that property (and not define `IsDickson`). --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict WIP t-order 324/0 Mathlib.lean,Mathlib/Data/Ordering/Dickson.lean,scripts/noshake.json 3 9 ['AntoineChambert-Loir', 'b-mehta', 'github-actions'] nobody
564-54257
1 year ago
615-43088
615 days ago
2-84515
2 days
16355 Ruben-VandeVelde
author:Ruben-VandeVelde
 feat: odd_{add,sub}_one --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-algebra awaiting-author t-number-theory
label:t-algebra$
 12/0 Mathlib/Algebra/Ring/Int.lean,Mathlib/Algebra/Ring/Parity.lean 2 4 ['Ruben-VandeVelde', 'github-actions', 'urkud'] nobody
564-2054
1 year ago
628-76900
628 days ago
0-57608
16 hours
8638 alreadydone
author:alreadydone
 refactor: noncommutative tensor product Co-authored-by: Eric Wieser Co-authored-by: Jujian Zhang This draft PR currently only generalizes a single file TensorProduct.lean; it allows TensorProduct to be taken over a non-commutative ring. Most of the declarations in TensorProduct.lean are now generalized to the non-commutative setting, and very few are deleted (their commutative version will be restored in another file). Next plans: + Change the namespace in TensorProduct.lean from TensorProduct to NonCommTensorProduct, and remove the #aligns + I plan to use the same notation for the non-commutative and the commutative TensorProduct, and the user will need to `open scoped` different namespaces to use the one of their choice. + Start a new file TensorProduct/Comm.lean, copy the content of TensorProduct.lean on master into it, change the definition TensorProduct to be semi-reducibly defeq to NonCommTensorProduct (in order to support more instances or unify non-defeq instances that become prop-eq in the commutative setting, e.g. we've chosen the R-action on a tensor product over commutative R to come from the left factor, since the action from the right factor is the same), and reuse the NonComm constructions as much as possible. We then change all files that imports TensorProduct.lean to import TensorProduct/Comm.lean instead. Once we do that, mathlib would compile and this PR would be complete. We can gradually generalize other files about tensor products this way. In this PR: `TensorProduct.map` is now defined in terms of `lTensor` and `rTensor` rather than the other way around, which requires moving `lTensor` and `rTensor` up from their original location. The definition of `rid` also becomes more challenging and is moved down. An evident observation is that actions on the domain of AddMonoidHom / LinearMap is really natural in the context of tensor products and Hom-tensor adjunction (`TensorProduct.lift`), not the default actions on the codomain. For example, it allows us to write the "balanced biadditive monoid homs" in #8536 as simply `N →ₗ[R] M →+ P` (where the right R-action on M turns into the left action on `M →+ P`). For this reason, we disable the default instances `AddMonoidHom/LinearMap.module` at the beginning of the file and enable the `AddMonoidHom/LinearMap.domModule` instances instead. (The action on the codomain would be necessary for the non-commutative version of [TensorProduct.lTensorHomToHomLTensor](https://leanprover-community.github.io/mathlib4_docs/Mathlib/LinearAlgebra/TensorProduct.html#TensorProduct.lTensorHomToHomLTensor) (in the form of `P ⊗[R] (M →+ Q) →+ M →+ P ⊗[R] Q`), but I've deleted it for now.) We register actions on the left factor of a tensor product as the default instance, but we also talk about actions on the right factor (`attribute [local instance] rightModule`). The Tensor-Hom adjunction #8495 is now `uncurryEquiv` in this PR. #8519 is now included in this PR and #8584 is now called `lift` in this PR. `CharacterModule.homEquiv` in #8559 can be obtained by combining `liftEquiv` and `flipMop` in this PR (except for a mop). To refactor the commutative tensor product, we'd need to transfer many R^mop-action to R-action and R^mop-LinearMaps to R-LinearMaps, which can be achieved via `Module.compHom` and `LinearMap.restrictScalars` (requires `LinearMap.CompatibleSMul` instance) given `RingEquiv.toOpposite`. `LinearMap.characterfy` and `CharacterModule.cong` could be obtained from `LinearMap.compAddMonoidHom` in this PR. TODO: + Move delarations that belong to other files. + Change docstrings that are no longer accurate. + Fix some argument order to be more natural. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict WIP t-algebra
label:t-algebra$
 793/676 Mathlib/Algebra/Module/LinearMap.lean,Mathlib/GroupTheory/GroupAction/DomAct/Basic.lean,Mathlib/LinearAlgebra/TensorProduct.lean 3 6 ['alreadydone', 'eric-wieser', 'grhkm21', 'jjaassoonn'] nobody
563-28267
1 year ago
unknown
0-0
0 seconds
14598 Command-Master
author:Command-Master
 chore: add typeclasses to unify various `add_top`, `add_eq_top`, etc. Add the four typeclasses `IsTopAbsorbing`, `IsBotAbsorbing`, `NoTopSum`, `NoBotSum`, as additive equivalents for `MulZeroClass` and `NoZeroDivisors`. Add instances of these for `ENNReal`, `WithTop α`, `WithBot α`, `PUnit`, `EReal`, `PartENat`, `Measure`, `Interval` and `Filter`. Also split `Algebra/Order/AddGroupWithTop` to `Algebra/Order/Group/WithTop` and `Algebra/Order/Monoid/WithTop` --- Previous usages of lemmas with quantified names like `WithTop.add_top` have to be changed to just `add_top`. `add_lt_top` is `@[simp]`, in accordance with `ENNReal.add_lt_top` being `@[simp]`. This affects `WithTop.add_lt_top` which previously hadn't been `@[simp]`. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-algebra t-order new-contributor
label:t-algebra$
 264/195 Archive/Wiedijk100Theorems/BallotProblem.lean,Mathlib.lean,Mathlib/Algebra/Order/Group/WithTop.lean,Mathlib/Algebra/Order/GroupWithZero/Canonical.lean,Mathlib/Algebra/Order/Interval/Basic.lean,Mathlib/Algebra/Order/Monoid/Unbundled/Basic.lean,Mathlib/Algebra/Order/Monoid/Unbundled/Defs.lean,Mathlib/Algebra/Order/Monoid/Unbundled/WithTop.lean,Mathlib/Algebra/Order/Monoid/WithTop.lean,Mathlib/Algebra/PUnitInstances/Order.lean,Mathlib/Algebra/Polynomial/Degree/Definitions.lean,Mathlib/Algebra/Polynomial/Monic.lean,Mathlib/Algebra/Tropical/Basic.lean,Mathlib/Analysis/Analytic/Meromorphic.lean,Mathlib/Analysis/Normed/Lp/ProdLp.lean,Mathlib/Analysis/NormedSpace/ENorm.lean,Mathlib/Analysis/SpecialFunctions/JapaneseBracket.lean,Mathlib/Analysis/SpecialFunctions/Log/ENNRealLog.lean,Mathlib/Data/ENNReal/Operations.lean,Mathlib/Data/ENat/Basic.lean,Mathlib/Data/Nat/PartENat.lean,Mathlib/Data/Nat/WithBot.lean,Mathlib/Data/Real/EReal.lean,Mathlib/LinearAlgebra/Lagrange.lean,Mathlib/MeasureTheory/Covering/Differentiation.lean,Mathlib/MeasureTheory/Decomposition/Lebesgue.lean,Mathlib/MeasureTheory/Function/ConditionalExpectation/CondexpL1.lean,Mathlib/MeasureTheory/Function/Jacobian.lean,Mathlib/MeasureTheory/Function/L1Space.lean,Mathlib/MeasureTheory/Function/L2Space.lean,Mathlib/MeasureTheory/Function/LpSeminorm/Basic.lean,Mathlib/MeasureTheory/Function/LpSeminorm/TriangleInequality.lean,Mathlib/MeasureTheory/Function/LpSpace.lean,Mathlib/MeasureTheory/Function/StronglyMeasurable/Basic.lean,Mathlib/MeasureTheory/Function/UniformIntegrable.lean,Mathlib/MeasureTheory/Integral/Bochner.lean,Mathlib/MeasureTheory/Integral/MeanInequalities.lean,Mathlib/MeasureTheory/Integral/SetIntegral.lean,Mathlib/MeasureTheory/Integral/VitaliCaratheodory.lean,Mathlib/MeasureTheory/Measure/Hausdorff.lean,Mathlib/MeasureTheory/Measure/Lebesgue/Basic.lean,Mathlib/MeasureTheory/Measure/LevyProkhorovMetric.lean,Mathlib/MeasureTheory/Measure/MeasureSpace.lean,Mathlib/MeasureTheory/Measure/MeasureSpaceDef.lean,Mathlib/MeasureTheory/Measure/Regular.lean,Mathlib/MeasureTheory/Measure/Typeclasses.lean,Mathlib/NumberTheory/Padics/PadicNumbers.lean,Mathlib/Order/Filter/Pointwise.lean,Mathlib/Probability/Kernel/Defs.lean,Mathlib/Probability/Martingale/Convergence.lean,Mathlib/RingTheory/Multiplicity.lean,Mathlib/RingTheory/MvPowerSeries/NoZeroDivisors.lean,Mathlib/RingTheory/UniqueFactorizationDomain.lean,Mathlib/Topology/EMetricSpace/Defs.lean,Mathlib/Topology/MetricSpace/Bounded.lean,Mathlib/Topology/MetricSpace/HausdorffDistance.lean,Mathlib/Topology/MetricSpace/Lipschitz.lean 57 30 ['Command-Master', 'YaelDillies', 'github-actions'] nobody
562-59855
1 year ago
562-59855
562 days ago
7-45599
7 days
18636 adomani
author:adomani
 Test/latest import report dev This PR is a test accompanying #18631. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict CI 147/0 .github/workflows/latest_import.yml,lakefile.lean 2 1 ['github-actions'] nobody
561-47126
1 year ago
unknown
0-0
0 seconds
16885 metinersin
author:metinersin
 feat(ModelTheory/Complexity): define literals Defines `FirstOrder.Language.BoundedFormula.IsLiteral` and `FirstOrder.Language.BoundedFormula.simpleNot` - an auxiliary operation that takes the negation of a formula and does some simplification. --- - [x] depends on: #16800 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict awaiting-author new-contributor t-logic 148/5 Mathlib/ModelTheory/Complexity.lean,Mathlib/ModelTheory/Equivalence.lean,Mathlib/ModelTheory/Semantics.lean,Mathlib/ModelTheory/Syntax.lean 4 20 ['YaelDillies', 'awainverse', 'github-actions', 'mathlib4-dependent-issues-bot', 'metinersin'] nobody
560-15976
1 year ago
596-5288
596 days ago
0-19926
5 hours
18716 jjaassoonn
author:jjaassoonn
 feat(Algebra/Module/GradedModule): quotient and subgrading - [ ] depends on: #9820 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) WIP t-algebra blocked-by-other-PR awaiting-CI merge-conflict
label:t-algebra$
 997/191 Counterexamples/HomogeneousPrimeNotPrime.lean,Mathlib.lean,Mathlib/Algebra/Group/Subgroup/Defs.lean,Mathlib/Algebra/Module/GradedModule/Basic.lean,Mathlib/Algebra/Module/GradedModule/QuotientGrading.lean,Mathlib/Algebra/Module/GradedModule/Subgrading.lean,Mathlib/AlgebraicGeometry/ProjectiveSpectrum/Topology.lean,Mathlib/RingTheory/GradedAlgebra/Homogeneous/Ideal.lean,Mathlib/RingTheory/GradedAlgebra/Homogeneous/Submodule.lean,Mathlib/RingTheory/GradedAlgebra/Quotient.lean,Mathlib/RingTheory/GradedAlgebra/Radical.lean,scripts/no_lints_prime_decls.txt 12 2 ['github-actions', 'mathlib4-dependent-issues-bot'] nobody
560-15607
1 year ago
unknown
0-0
0 seconds
9341 winstonyin
author:winstonyin
 feat: Naturality of integral curves Let `v` and `v'` be sections of the tangent bundle of manifolds `M` and `M'`, respectively, and let `f : M → M'` be a differentiable map. Then `f` maps integral curves of `v` to integral curves of `v'` if and only if `v` and `v'` are `f`-related. - [x] depends on: #8483 --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict awaiting-author t-differential-geometry 45/0 Mathlib/Geometry/Manifold/IntegralCurve.lean,Mathlib/Topology/Algebra/Module/Basic.lean 2 9 ['github-actions', 'grunweg', 'leanprover-community-mathlib4-bot', 'winstonyin'] nobody
556-67799
1 year ago
864-37869
864 days ago
0-28222
7 hours
13248 hcWang942
author:hcWang942
 feat: basic concepts of auction theory ## Description Formalise some core concepts and results in auction theory: this includes definitions for first-price and second-price auctions, as well as several fundamental results and helping lemmas. This is the very first PR of the project formalizing core concepts and results in auction theory. Our group is working on more contributions on the formalization of game theory prefix. Co-authored-by: Ma Jiajun ## Reference Roughgarden, Tim. ***Twenty Lectures on Algorithmic Game Theory***. Cambridge University Press, 2020. [Link](https://www.cambridge.org/core/books/twenty-lectures-on-algorithmic-game-theory/A9D9427C8F43E7DAEF8C702755B6D72B) --- - [x] Will depend on #14163 once that PR is merged. The Fintype lemmas introduced by this PR have been added in that PR and will be removed from here once that PR gets merged ## Current plan for formalization of Game Theory The current plan for the formalizing of Game Theory include: #### 1. Auction Theory. 🎉 _(200+ lines, this PR)_ - Essential definitions of Sealed-bid auction, First-price auction and Second-price auction. - First-price auction has no dominant strategy. - Second-price auction has dominant strategy. (Second-price auction is DSIC) #### 2. Mechanism design & Myerson's Lemma. 🎉 (400+ lines, pending for modification to Mathlib Standard) - Mechanism design An allocation rule is implementable if there exists - Dominant Strategy Incentive Compatible (DSIC) payment rule - An allocation rule is monotone if for every bidder’s gain is nondecreasing w.r.t. her/his bid - Myerson's Lemma Implementable ⇔ Monotone In the above case, the DSIC payment rule is unique. #### 3. von Neumann‘s Minimax Theorem. 🎉 (800+ lines, pending for modification to Mathlib Standard) - Equilibrium in zero sum game - Formalization strategy: via Loomis’s theorem. #### 4. Nash Equilibrium. 🎉 (pending for modification to Mathlib Standard) #### 5. Brouwer fixed-point theorem. (Work in Progress) #### 6. More Mechanism design. (Planning) merge-conflict awaiting-author new-contributor t-logic 204/0 Mathlib.lean,Mathlib/GameTheory/Auction/Basic.lean,docs/references.bib 3 148 ['Shreyas4991', 'YaelDillies', 'eric-wieser', 'faenuccio', 'github-actions', 'grunweg', 'hcWang942', 'tb65536', 'urkud', 'vihdzp'] hcWang942
assignee:hcWang942
555-54808
1 year ago
569-40996
569 days ago
109-82807
109 days
17675 FR-vdash-bot
author:FR-vdash-bot
 perf: do not search algebraic hierarchy when searching `FunLike` hierarchy --- Unification is still very slow. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict slow-typeclass-synthesis t-algebra
label:t-algebra$
 144/4 Mathlib.lean,Mathlib/Algebra/Algebra/Equiv.lean,Mathlib/Algebra/Algebra/Hom.lean,Mathlib/Algebra/Algebra/NonUnitalHom.lean,Mathlib/Algebra/Algebra/Rat.lean,Mathlib/Algebra/Group/Equiv/Basic.lean,Mathlib/Algebra/GroupWithZero/Hom.lean,Mathlib/Algebra/Module/Equiv/Defs.lean,Mathlib/Algebra/Module/LinearMap/Defs.lean,Mathlib/Algebra/Order/Hom/Basic.lean,Mathlib/Algebra/Ring/CentroidHom.lean,Mathlib/Algebra/Ring/Equiv.lean,Mathlib/Algebra/Ring/Hom/Defs.lean,Mathlib/Algebra/Star/StarAlgHom.lean,Mathlib/Analysis/Normed/Algebra/Spectrum.lean,Mathlib/Analysis/Normed/Operator/LinearIsometry.lean,Mathlib/GroupTheory/GroupAction/Hom.lean,Mathlib/RingTheory/Bialgebra/Equiv.lean,Mathlib/RingTheory/Bialgebra/Hom.lean,Mathlib/RingTheory/Coalgebra/Equiv.lean,Mathlib/Topology/Algebra/Module/Basic.lean,Mathlib/Util/SetSynthOrder.lean,MathlibTest/TCSynth.lean,scripts/noshake.json 24 5 ['astrainfinita', 'github-actions', 'leanprover-bot'] nobody
555-29941
1 year ago
unknown
0-0
0 seconds
9344 erdOne
author:erdOne
 feat: Add `AddGroup.FG` -> `Module.Finite ℤ` as instances --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict awaiting-author t-algebra
label:t-algebra$
 4/0 Mathlib/RingTheory/Finiteness.lean 1 4 ['alreadydone', 'erdOne', 'leanprover-bot'] nobody
554-39201
1 year ago
853-39644
853 days ago
21-27905
21 days
12133 ADedecker
author:ADedecker
 feat: generalize instIsLowerProd to arbitrary products Also change a bit the proof of the product case to match my own taste, feel free to tell if you prefer the old one. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict awaiting-author t-topology t-order 34/14 Mathlib/Topology/Constructions.lean,Mathlib/Topology/Order/LowerUpperTopology.lean 2 13 ['Ruben-VandeVelde', 'TwoFX', 'github-actions', 'jcommelin', 'mans0954', 'mathlib-bors', 'riccardobrasca'] nobody
553-48955
1 year ago
704-44591
704 days ago
63-69226
63 days
16637 FR-vdash-bot
author:FR-vdash-bot
 perf: reorder `extends` of `(Add)Monoid` --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict WIP t-algebra
label:t-algebra$
 46/51 Mathlib/Algebra/Algebra/Hom.lean,Mathlib/Algebra/BigOperators/Ring/List.lean,Mathlib/Algebra/GCDMonoid/Basic.lean,Mathlib/Algebra/Group/Defs.lean,Mathlib/Algebra/Group/Ext.lean,Mathlib/Algebra/Group/Opposite.lean,Mathlib/Algebra/Group/Prod.lean,Mathlib/Algebra/Order/Group/Unbundled/Abs.lean,Mathlib/Algebra/Polynomial/Roots.lean,Mathlib/Algebra/Ring/SumsOfSquares.lean,Mathlib/CategoryTheory/Preadditive/FunctorCategory.lean,Mathlib/Data/Finset/NoncommProd.lean,Mathlib/GroupTheory/Congruence/Defs.lean,Mathlib/GroupTheory/Torsion.lean,Mathlib/LinearAlgebra/LinearPMap.lean,Mathlib/LinearAlgebra/TensorProduct/Basic.lean,Mathlib/Order/Filter/Germ/Basic.lean,Mathlib/RingTheory/Bialgebra/Hom.lean,Mathlib/RingTheory/Coalgebra/Hom.lean,Mathlib/RingTheory/TensorProduct/MvPolynomial.lean 20 3 ['astrainfinita', 'github-actions', 'leanprover-bot'] nobody
553-48193
1 year ago
618-55549
618 days ago
1-49655
1 day
18765 FR-vdash-bot
author:FR-vdash-bot
 chore: changing `outParam` of `MulActionSemiHomClass` --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-algebra
label:t-algebra$
 60/34 Mathlib/Algebra/Algebra/NonUnitalHom.lean,Mathlib/Algebra/Category/ModuleCat/Limits.lean,Mathlib/Algebra/Module/LinearMap/Defs.lean,Mathlib/GroupTheory/GroupAction/Hom.lean 4 4 ['astrainfinita', 'github-actions', 'leanprover-bot'] nobody
553-4454
1 year ago
unknown
0-0
0 seconds
15822 kmill
author:kmill
 feat: greedy colorings of finite graphs Proves that the greedy coloring only takes `G.maxDegree + 1` colors. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-combinatorics 159/0 Mathlib/Combinatorics/SimpleGraph/ConcreteColorings.lean 1 1 ['github-actions'] nobody
550-29647
1 year ago
unknown
0-0
0 seconds
8661 joelriou
author:joelriou
 feat(CategoryTheory/Sites): descent of sheaves In this PR, it is shown that the category of sheaves on a site `(C, J)` identifies as a full subcategory of a category of families of sheaves equipped with a descent data (for a family of objects which cover the final object). Under suitable conditions, it shall be shown that this is an equivalence of categories (TODO). --- This shall be split in small PRs later. - [x] depends on: #8622 - [x] depends on: #8632 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict WIP t-category-theory 1396/26 Mathlib.lean,Mathlib/CategoryTheory/Over.lean,Mathlib/CategoryTheory/Sites/CoverPreserving.lean,Mathlib/CategoryTheory/Sites/Descent.lean,Mathlib/CategoryTheory/Sites/EqualizerSheafCondition.lean,Mathlib/CategoryTheory/Sites/InducedTopology.lean,Mathlib/CategoryTheory/Sites/ObjectsCoverTop.lean,Mathlib/CategoryTheory/Sites/Over.lean,Mathlib/CategoryTheory/Sites/SheafHom.lean,Mathlib/CategoryTheory/Sites/Sieves.lean 10 3 ['github-actions', 'leanprover-community-mathlib4-bot'] nobody
550-25175
1 year ago
unknown
0-0
0 seconds
19055 JLimperg
author:JLimperg
 Test precompilation (batteries + aesop) again merge-conflict 9/8 lake-manifest.json,lakefile.lean 2 5 ['JLimperg', 'github-actions', 'leanprover-bot'] nobody
550-6818
1 year ago
unknown
0-0
0 seconds
10476 shuxuezhuyi
author:shuxuezhuyi
 feat(Topology/UniformSpace): define uniform preordered space We define the semi-uniform structure and the uniform preordered space. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict awaiting-author t-topology 94/0 Mathlib.lean,Mathlib/Topology/UniformSpace/UniformOrder.lean,docs/references.bib 3 2 ['shuxuezhuyi'] nobody
549-11829
1 year ago
777-39257
777 days ago
52-19273
52 days
17593 astrainfinita
author:astrainfinita
 chore(Algebra/Order/GroupWithZero/Unbundled): deprecate useless lemmas, use `ZeroLEOneClass` There are still some useless lemmas that were simply ported from `Algebra.Order.Monoid.Lemmas`, such as just chain an existing lemma with an assumption and lemmas whose assumptions imply `1 ≤ 0`. This PR removes them. Also, some lemmas have both assumptions like `1 < a` `0 < a`. This PR uses `ZeroLEOneClass` to remove redundant assumptions. --- - [ ] depends on: #17623 Ported from https://github.com/leanprover-community/mathlib/pull/16525 and https://github.com/leanprover-community/mathlib/pull/18158 Adapted from #9250. This version is easier to review. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-algebra blocked-by-other-PR t-order
label:t-algebra$
 188/48 Archive/Wiedijk100Theorems/BuffonsNeedle.lean,Mathlib/Algebra/Order/GroupWithZero/Canonical.lean,Mathlib/Algebra/Order/GroupWithZero/Unbundled.lean,Mathlib/Combinatorics/SimpleGraph/Triangle/Counting.lean,Mathlib/RingTheory/DedekindDomain/FiniteAdeleRing.lean,Mathlib/Topology/Algebra/Order/Field.lean 6 4 ['astrainfinita', 'github-actions', 'mathlib4-dependent-issues-bot', 'vihdzp'] nobody
548-35171
1 year ago
589-20752
589 days ago
0-74903
20 hours
17623 FR-vdash-bot
author:FR-vdash-bot
 feat(Algebra/Order/GroupWithZero/Unbundled): add some lemmas Some lemmas in `Algebra.Order.GroupWithZero.Unbundled` have incorrect or unsatisfactory names, or assumptions that can be omitted using `ZeroLEOneClass`. The lemmas added in this PR are versions of existing lemmas that use the correct or better name or `ZeroLEOneClass` to omit an assumption. The original lemmas will be deprecated in #17593. | New name | Old name | |-------------------------|-------------------------| | `mul_le_one_left₀` | `Left.mul_le_one_of_le_of_le` | | `mul_lt_one_of_le_of_lt_left₀` (`0 ≤ ·` version) / `mul_lt_one_of_le_of_lt_of_pos_left` | `Left.mul_lt_of_le_of_lt_one_of_pos` | | `mul_lt_one_of_lt_of_le_left₀` | `Left.mul_lt_of_lt_of_le_one_of_nonneg` | | `mul_le_one_right₀` | `Right.mul_le_one_of_le_of_le` | | `mul_lt_one_of_lt_of_le_right₀` (`0 ≤ ·` version) / `mul_lt_one_of_lt_of_le_of_pos_right` | `Right.mul_lt_one_of_lt_of_le_of_pos` | | `mul_lt_one_of_le_of_lt_right₀` | `Right.mul_lt_one_of_le_of_lt_of_nonneg` | The following lemmas use `ZeroLEOneClass`. | New name | Old name | |-------------------------|-------------------------| | `(Left.)one_le_mul₀` | `Left.one_le_mul_of_le_of_le` | | `Left.one_lt_mul_of_le_of_lt₀` | `Left.one_lt_mul_of_le_of_lt_of_pos` | | `Left.one_lt_mul_of_lt_of_le₀` | `Left.lt_mul_of_lt_of_one_le_of_nonneg` / `one_lt_mul_of_lt_of_le` (still there) | | `(Left.)one_lt_mul₀` | | | `Right.one_le_mul₀` | `Right.one_le_mul_of_le_of_le` | | `Right.one_lt_mul_of_lt_of_le₀` | `Right.one_lt_mul_of_lt_of_le_of_pos` | | `Right.one_lt_mul_of_le_of_lt₀` | `Right.one_lt_mul_of_le_of_lt_of_nonneg` / `one_lt_mul_of_le_of_lt` (still there) / `one_lt_mul` (still there) | | `Right.one_lt_mul₀` | `Right.one_lt_mul_of_lt_of_lt` | --- Split from #17593. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-algebra awaiting-zulip t-order
label:t-algebra$
 146/44 Mathlib/Algebra/Order/GroupWithZero/Canonical.lean,Mathlib/Algebra/Order/GroupWithZero/Unbundled.lean 2 11 ['YaelDillies', 'astrainfinita', 'github-actions', 'j-loreaux'] nobody
548-35171
1 year ago
555-27730
555 days ago
33-64877
33 days
18969 alreadydone
author:alreadydone
 chore: generalize Module to NonUnitalSemiring --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict WIP t-algebra
label:t-algebra$
 94/75 Mathlib/Algebra/Category/ModuleCat/Presheaf.lean,Mathlib/Algebra/Group/Action/Defs.lean,Mathlib/Algebra/Group/Action/End.lean,Mathlib/Algebra/Group/Action/Prod.lean,Mathlib/Algebra/Group/Action/TypeTags.lean,Mathlib/Algebra/GroupWithZero/Action/Defs.lean,Mathlib/Algebra/Module/Defs.lean,Mathlib/Algebra/Module/Submodule/Defs.lean,Mathlib/Algebra/Polynomial/Div.lean,Mathlib/Algebra/Polynomial/Laurent.lean,Mathlib/AlgebraicGeometry/EllipticCurve/Group.lean,Mathlib/AlgebraicGeometry/Limits.lean,Mathlib/AlgebraicGeometry/ProjectiveSpectrum/Scheme.lean,Mathlib/Analysis/CStarAlgebra/ContinuousFunctionalCalculus/Order.lean,Mathlib/Analysis/Distribution/SchwartzSpace.lean,Mathlib/Geometry/Manifold/Instances/Sphere.lean,Mathlib/GroupTheory/CoprodI.lean,Mathlib/LinearAlgebra/FreeModule/IdealQuotient.lean,Mathlib/LinearAlgebra/LinearDisjoint.lean,Mathlib/LinearAlgebra/Matrix/SesquilinearForm.lean,Mathlib/LinearAlgebra/TensorProduct/Submodule.lean,Mathlib/RingTheory/Filtration.lean,Mathlib/RingTheory/Flat/FaithfullyFlat.lean,Mathlib/RingTheory/Ideal/Cotangent.lean,Mathlib/RingTheory/Ideal/Defs.lean,Mathlib/RingTheory/Ideal/Lattice.lean,Mathlib/RingTheory/Ideal/Operations.lean,Mathlib/RingTheory/Ideal/Prod.lean,Mathlib/RingTheory/Presentation.lean,Mathlib/RingTheory/Smooth/Kaehler.lean,Mathlib/RingTheory/TensorProduct/MvPolynomial.lean 31 11 ['alreadydone', 'eric-wieser', 'github-actions', 'leanprover-bot'] nobody
546-58823
1 year ago
unknown
0-0
0 seconds
17624 FR-vdash-bot
author:FR-vdash-bot
 feat(Algebra/Order/GroupWithZero/Unbundled): generalize lemmas --- - [ ] depends on: #17623 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-algebra blocked-by-other-PR t-order
label:t-algebra$
 121/26 Mathlib/Algebra/Order/GroupWithZero/Unbundled.lean 1 2 ['github-actions', 'mathlib4-dependent-issues-bot'] nobody
544-72343
1 year ago
589-19622
589 days ago
0-465
7 minutes
17513 FR-vdash-bot
author:FR-vdash-bot
 perf: do not search algebraic hierarchies when using `map_*` lemmas --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict WIP t-algebra awaiting-bench
label:t-algebra$
 5/3 Mathlib/Algebra/Group/Hom/Defs.lean,Mathlib/GroupTheory/GroupAction/Hom.lean 2 10 ['astrainfinita', 'github-actions', 'grunweg', 'leanprover-bot'] nobody
543-31365
1 year ago
587-33230
587 days ago
4-72589
4 days
17515 FR-vdash-bot
author:FR-vdash-bot
 perf: do not need `simp low` now --- - [ ] depends on: #17513 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-algebra blocked-by-other-PR
label:t-algebra$
 12/10 Mathlib/Algebra/Group/Hom/Defs.lean,Mathlib/Analysis/SpecialFunctions/Bernstein.lean,Mathlib/GroupTheory/GroupAction/Hom.lean,Mathlib/NumberTheory/LucasLehmer.lean 4 2 ['github-actions', 'mathlib4-dependent-issues-bot'] nobody
543-31364
1 year ago
592-18876
592 days ago
0-380
6 minutes
19212 Julian
author:Julian
 feat(LinearAlgebra): add a variable_alias for VectorSpace Taken directly from the variable_alias docs. Zulip: https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/why.20.5Bvariable_alias.5D.20attribute.20is.20not.20used.20in.20Mathlib.3F --- This is the first actual variable alias added to mathlib. I haven't reviewed variable_alias fully, but it seems like there's at least 3 ways they could be distributed in Mathlib: * alongside whatever subfolder they "belong to" (which is what I've tentatively done here) * In a file called `Aliases` somewhere near the thing they alias (which seems less discoverable to me) * In a single file, a la `Mathlib.TrainingWheels` (with some less playful name) which is meant to define a bunch of more "friendly" aliases all in one place. I kind of like the idea of the third thing as a future module but perhaps it can be synthesized if/when there are more aliases? For now as I say I've done the first one, but please let me know if someone prefers something else. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-algebra
label:t-algebra$
 25/0 Mathlib.lean,Mathlib/LinearAlgebra/VectorSpace.lean,scripts/noshake.json 3 10 ['Julian', 'PieterCuijpers', 'github-actions', 'urkud'] nobody
542-36610
1 year ago
542-36610
542 days ago
7-68089
7 days
19337 zeramorphic
author:zeramorphic
 feat(Data/Finsupp): generalise `Finsupp` to any "zero" value Remove the explicit dependence of `Finsupp` on `[Zero M]`, instead defining `Finsupp'` (better name pending) to be functions that are equal to a fixed value `z : M` cofinitely often. This PR is intended to do the initial work of replacing the definition of `Finsupp` with an instantiation of the more general definition, without adding any appropriate API. If accepted, the API development will follow in later PRs. Issues to consider: - Naming of `Finsupp'.` - Where should `Finsupp'` lemmas go? Do they need their own file/folder under `Data/`? Relevant Zulip threads: - https://leanprover.zulipchat.com/#narrow/channel/217875-Is-there-code-for-X.3F/topic/Finsupp.20generalisations - https://leanprover.zulipchat.com/#narrow/channel/217875-Is-there-code-for-X.3F/topic/Finsupp-like.20partial.20function Comments are welcome. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-data 203/83 Archive/Wiedijk100Theorems/Partition.lean,Mathlib/Algebra/MvPolynomial/Basic.lean,Mathlib/Algebra/MvPolynomial/Rename.lean,Mathlib/Algebra/MvPolynomial/Variables.lean,Mathlib/Algebra/Polynomial/Basic.lean,Mathlib/Algebra/Polynomial/Laurent.lean,Mathlib/Data/Finsupp/BigOperators.lean,Mathlib/Data/Finsupp/Defs.lean,Mathlib/Data/Finsupp/Order.lean,Mathlib/Data/Nat/Choose/Multinomial.lean,Mathlib/RingTheory/MvPolynomial/Symmetric/Defs.lean,Mathlib/RingTheory/PowerBasis.lean,scripts/nolints_prime_decls.txt 13 5 ['github-actions', 'vihdzp', 'zeramorphic'] nobody
540-12687
1 year ago
540-12687
540 days ago
4-60621
4 days
18756 astrainfinita
author:astrainfinita
 refactor: deprecate `DistribMulActionSemiHomClass` `MulSemiringActionSemiHomClass` --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-algebra
label:t-algebra$
 50/28 Mathlib/Algebra/Algebra/NonUnitalHom.lean,Mathlib/Algebra/Module/LinearMap/Defs.lean,Mathlib/GroupTheory/GroupAction/Hom.lean 3 4 ['astrainfinita', 'github-actions', 'leanprover-bot'] nobody
528-64756
1 year ago
528-64756
528 days ago
31-53021
31 days
19125 yhtq
author:yhtq
 feat: add theorems to transfer `IsGalois` between pairs of fraction rings feat: add theorems to transfer `IsGalois` between pairs of fraction rings. - [x] depends on: #18404 - [x] depends on: #19124 --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-algebra new-contributor
label:t-algebra$
 121/0 Mathlib.lean,Mathlib/FieldTheory/Galois/IsFractionRing.lean,Mathlib/RingTheory/Localization/FractionRing.lean 3 3 ['github-actions', 'mathlib4-dependent-issues-bot', 'tb65536'] nobody
525-77225
1 year ago
552-38607
552 days ago
0-1980
33 minutes
18841 hrmacbeth
author:hrmacbeth
 chore: change some `linarith`s to `linear_combination`s Change 100 `linarith`s to `linear_combination`s; this is generally a slight speedup. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) - [x] depends on: #18714 (not strictly blocked by this, but the speed comparison will be more informative after it) merge-conflict WIP 106/107 Archive/Imo/Imo1959Q2.lean,Archive/Imo/Imo1988Q6.lean,Archive/Imo/Imo2005Q3.lean,Archive/Imo/Imo2008Q2.lean,Archive/Imo/Imo2008Q3.lean,Archive/Imo/Imo2013Q5.lean,Archive/Imo/Imo2021Q1.lean,Mathlib/Analysis/Analytic/Basic.lean,Mathlib/Analysis/Analytic/Inverse.lean,Mathlib/Analysis/Calculus/BumpFunction/FiniteDimension.lean,Mathlib/Analysis/Complex/AbelLimit.lean,Mathlib/Analysis/Convex/Gauge.lean,Mathlib/Analysis/Convex/Slope.lean,Mathlib/Analysis/Convex/SpecificFunctions/Basic.lean,Mathlib/Analysis/Convex/Uniform.lean,Mathlib/Analysis/Convex/Visible.lean,Mathlib/Analysis/FunctionalSpaces/SobolevInequality.lean,Mathlib/Analysis/Normed/Module/FiniteDimension.lean,Mathlib/Analysis/PSeries.lean,Mathlib/Analysis/SpecialFunctions/Gamma/BohrMollerup.lean,Mathlib/Analysis/SpecialFunctions/Log/Basic.lean,Mathlib/Analysis/SpecialFunctions/Log/Monotone.lean,Mathlib/Analysis/SpecialFunctions/Pow/Deriv.lean,Mathlib/Analysis/SpecialFunctions/Pow/Real.lean,Mathlib/Analysis/SpecificLimits/FloorPow.lean,Mathlib/MeasureTheory/Covering/BesicovitchVectorSpace.lean,Mathlib/MeasureTheory/Measure/Lebesgue/VolumeOfBalls.lean,Mathlib/NumberTheory/Modular.lean,Mathlib/NumberTheory/Transcendental/Liouville/LiouvilleWith.lean,Mathlib/Probability/Distributions/Pareto.lean 30 29 ['github-actions', 'grunweg', 'hrmacbeth', 'jcommelin', 'leanprover-bot', 'mathlib4-dependent-issues-bot'] nobody
524-38151
1 year ago
546-60397
546 days ago
3-28253
3 days
11142 hmonroe
author:hmonroe
 feat(ProofTheory): Define logical symbols abstractly; opens new top-level section, drawing from lean4-logic --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict awaiting-author t-logic 468/1 Mathlib.lean,Mathlib/Data/Fin/VecNotation.lean,Mathlib/ProofTheory/LogicSymbol.lean 3 19 ['PatrickMassot', 'YaelDillies', 'avigad', 'fpvandoorn', 'github-actions'] nobody
518-47971
1 year ago
715-21620
715 days ago
94-3235
94 days
11210 hmonroe
author:hmonroe
 Test commit --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict WIP 1950/1 Mathlib.lean,Mathlib/Data/Fin/VecNotation.lean,Mathlib/ProofTheory/Calculus.lean,Mathlib/ProofTheory/FirstOrder/Arith/Language.lean,Mathlib/ProofTheory/FirstOrder/Basic/Syntax/Term.lean,Mathlib/ProofTheory/LogicSymbol.lean,Mathlib/ProofTheory/Matrix.lean,Mathlib/ProofTheory/Semantics.lean,Mathlib/ProofTheory/System.lean,docs/references.bib 10 100 ['github-actions'] nobody
518-47970
1 year ago
804-37451
804 days ago
2-67901
2 days
19621 Command-Master
author:Command-Master
 feat: Multiplicity and prime-adic valuation of derivations --- - [ ] depends on: #19596 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-algebra blocked-by-other-PR large-import
label:t-algebra$
 397/13 Mathlib.lean,Mathlib/Algebra/Order/AddGroupWithTop.lean,Mathlib/Algebra/Order/Monoid/Unbundled/WithTop.lean,Mathlib/Data/ENat/Basic.lean,Mathlib/Order/WithBot.lean,Mathlib/RingTheory/Derivation/Multiplicity.lean,Mathlib/RingTheory/DiscreteValuationRing/Basic.lean,Mathlib/RingTheory/Valuation/Basic.lean,Mathlib/RingTheory/Valuation/PrimeMultiplicity.lean 9 2 ['github-actions', 'mathlib4-dependent-issues-bot'] nobody
518-30231
1 year ago
538-55580
538 days ago
0-666
11 minutes
18262 joelriou
author:joelriou
 feat(Algebra/Category/ModuleCat/Presheaf): exterior powers of presheaves of modules --- - [x] depends on: #18261 - [ ] depends on: #18236 - [ ] depends on: #18197 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) WIP t-algebra blocked-by-other-PR t-category-theory merge-conflict
label:t-algebra$
 874/0 Mathlib.lean,Mathlib/Algebra/Category/ModuleCat/ChangeOfRings.lean,Mathlib/Algebra/Category/ModuleCat/ExteriorPower.lean,Mathlib/Algebra/Category/ModuleCat/Presheaf/ExteriorPower.lean,Mathlib/Algebra/Category/ModuleCat/Presheaf/FunctorOfNatTrans.lean,Mathlib/Algebra/Category/ModuleCat/Pseudofunctor.lean 6 2 ['github-actions', 'mathlib4-dependent-issues-bot'] nobody
518-21526
1 year ago
unknown
0-0
0 seconds
18294 FR-vdash-bot
author:FR-vdash-bot
 perf: make `Mul.toSMul` higher priority --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict awaiting-bench t-algebra
label:t-algebra$
 2/5 Mathlib/Algebra/Group/Action/Defs.lean,Mathlib/Algebra/Order/Field/Pointwise.lean,Mathlib/Combinatorics/Additive/AP/Three/Defs.lean,Mathlib/Topology/Algebra/Module/WeakBilin.lean 4 4 ['astrainfinita', 'github-actions', 'leanprover-bot'] nobody
513-29163
1 year ago
unknown
0-0
0 seconds
15269 kkytola
author:kkytola
 feat: Add ENNReal.floor A right-continuous floor function on `ENNReal`. --- - [x] depends on: #13938 - [ ] depends on: #15773 (general type class for `ENat`-valued floor functions) - [x] depends on: #15380 (topology on `ENat` is needed to state right continuity of the floor function) [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra blocked-by-other-PR t-order merge-conflict awaiting-author
label:t-algebra$
 445/0 Mathlib.lean,Mathlib/Algebra/Order/EFloor.lean,Mathlib/Data/ENNReal/Floor.lean,Mathlib/Data/Nat/Lattice.lean 4 18 ['YaelDillies', 'github-actions', 'kkytola', 'leanprover-community-mathlib4-bot', 'urkud'] nobody
505-2460
1 year ago
653-83926
653 days ago
0-3440
57 minutes
15773 kkytola
author:kkytola
 feat: Add type class for ENat-valued floor functions This PR adds a type class for extended natural number -valued floor functions. This is split off from #15269, where the suggestions were to make the floor function on ENNReal ENat-valued and to have an API mimicling FloorSemirings. Besides ENNReal, at least ENNRat would naturally satisfy the general type class. --- Two things are worth noting: * To fully mimic `FloorSemiring` API, also ceiling functions need to be added. The plan is to do that in a later PR. * The PR introduces the class `CastNatENatClass` to ensure that `natCast` and a coercion from `ENat` behave in the natural and order-respecing manner. This feels a little ad hoc, but such assumptions are needed for general `ENat`-valued floor functions to behave well. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict awaiting-author t-order 231/0 Mathlib.lean,Mathlib/Algebra/Order/EFloor.lean,Mathlib/Data/ENat/Basic.lean 3 5 ['YaelDillies', 'github-actions', 'kkytola', 'urkud'] nobody
505-2337
1 year ago
581-1690
581 days ago
66-24436
66 days
3251 kmill
author:kmill
 feat: deriving `LinearOrder` for simple enough inductive types Uses the same machinery underlying the `Fintype` derive handler to derive a lexicographical `LinearOrder` for non-recursive inductive types that have no indices. In principle more complicated types can have `LinearOrder`s, but that would require a more sophisticated implementation. --- - [x] depends on: #3198 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict WIP awaiting-author t-meta 82/0 Mathlib.lean,Mathlib/Tactic/DeriveLinearOrder.lean 2 5 ['ChrisHughes24', 'kim-em', 'kmill', 'vihdzp'] nobody
502-63390
1 year ago
1128-65421
1128 days ago
1-80343
1 day
3610 TimothyGu
author:TimothyGu
 feat: derive Infinite automatically for inductive types Deals with recursive types, but not mutually recursive types or types with indices right now. See docstring for details. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict awaiting-author t-meta 517/0 Mathlib.lean,Mathlib/Tactic/DeriveInfinite.lean,test/DeriveInfinite.lean 3 11 ['TimothyGu', 'digama0', 'eric-wieser', 'grunweg', 'kim-em', 'kmill'] kmill
assignee:kmill
502-63389
1 year ago
1114-58431
1114 days ago
9-24079
9 days
16120 awainverse
author:awainverse
 feat(ModelTheory/Algebra/Ring/Basic): Ring homomorphisms are a `StrongHomClass` for the language of rings Adds an `IsAlgebraic` instance to the language of rings Adds a `StrongHomClass` instance to the type of ring homomorphisms between rings with `CompatibleRing` structures --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-algebra RFC t-logic
label:t-algebra$
 34/13 Mathlib/ModelTheory/Algebra/Ring/Basic.lean 1 10 ['ChrisHughes24', 'YaelDillies', 'awainverse', 'github-actions', 'jcommelin'] nobody
500-80930
1 year ago
500-80930
500 days ago
135-29017
135 days
20459 Ruben-VandeVelde
author:Ruben-VandeVelde
 chore: fix names of roots_C_mul_X_{add,sub}_C_of_IsUnit --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) awaiting-author t-algebra
label:t-algebra$
 11/5 Mathlib/Algebra/Polynomial/FieldDivision.lean,Mathlib/Algebra/Polynomial/Roots.lean 2 2 ['eric-wieser', 'github-actions'] nobody
499-18973
1 year ago
499-18973
499 days ago
4-64422
4 days
20527 trivial1711
author:trivial1711
 refactor(Topology/UniformSpace/Completion): more descriptive names for `α → Completion α` - We rename the various maps `α → Completion α` in order to make their names more consistent. - Let `α` be a uniform space. We rename the uniformly continuous function `α → Completion α` from `UniformSpace.Completion.coe'` to `UniformSpace.Completion.coe`. - Let `α` be a uniform additive group. We rename the additive group homomorphism `α →+ Completion α` from `UniformSpace.Completion.toCompl` to `UniformSpace.Completion.coeAddHom`. - Let `α` be a uniform ring. The ring homomorphism `α →+* Completion α` is called `UniformSpace.Completion.coeRingHom`; its name is unchanged. - Let `α` be a normed space over a field `𝕜`. We rename the linear isometry `α →ₗᵢ[𝕜] Completion α` from `UniformSpace.Completion.toComplₗᵢ` to `UniformSpace.Completion.coeₗᵢ`. - Let `α` be a normed space over a field `𝕜`. We rename the continuous linear map `α →L[𝕜] Completion α` from `UniformSpace.Completion.toComplL` to `UniformSpace.Completion.coeL`. - Let `α` be a normed additive group. We rename the norm preserving homomorphism `NormedAddGroupHom α (Completion α)` from `NormedAddCommGroup.toCompl` to `UniformSpace.Completion.coeNormedAddGroupHom`. - We analogously rename some other theorems. - We add some trivial theorems (all of which are proved by `rfl`) that state that the functions considered above are equal. We give all of them the `simp` and `norm_cast` attributes. - We add a new theorem `UniformSpace.Completion.coeAddHom_eq_coe` that states that `UniformSpace.Completion.coeAddHom` and `UniformSpace.Completion.coe` are equal as functions. - We similarly add a new theorem `UniformSpace.Completion.coeRingHom_eq_coe`. - We rename the theorem `UniformSpace.Completion.coe_toComplₗᵢ` to `UniformSpace.Completion.coeₗᵢ_eq_coe`. - We rename the theorem `UniformSpace.Completion.coe_toComplL` to `UniformSpace.Completion.coeL_eq_coe`. - We similarly add a new theorem `UniformSpace.Completion.coeNormedAddGroupHom_eq_coe`. - We change all occurrences of the string `((↑) : α → Completion α)` to `(coe : α → Completion α)` or just `coe`. - We put the statements of some theorems into simp normal form by using the plain function `coe` rather than the homomorphisms that carry more structure. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-topology 130/92 Mathlib/Analysis/Analytic/Uniqueness.lean,Mathlib/Analysis/Calculus/FDeriv/Analytic.lean,Mathlib/Analysis/Complex/AbsMax.lean,Mathlib/Analysis/Complex/Liouville.lean,Mathlib/Analysis/InnerProductSpace/Completion.lean,Mathlib/Analysis/Normed/Group/HomCompletion.lean,Mathlib/Analysis/Normed/Module/Completion.lean,Mathlib/Analysis/SpecialFunctions/NonIntegrable.lean,Mathlib/MeasureTheory/Integral/IntegralEqImproper.lean,Mathlib/Topology/Algebra/GroupCompletion.lean,Mathlib/Topology/Algebra/InfiniteSum/GroupCompletion.lean,Mathlib/Topology/Algebra/InfiniteSum/Nonarchimedean.lean,Mathlib/Topology/Algebra/Nonarchimedean/Completion.lean,Mathlib/Topology/Algebra/UniformRing.lean,Mathlib/Topology/Category/UniformSpace.lean,Mathlib/Topology/MetricSpace/Completion.lean,Mathlib/Topology/UniformSpace/Completion.lean 17 4 ['eric-wieser', 'github-actions', 'trivial1711'] nobody
494-25562
1 year ago
494-25562
494 days ago
6-66637
6 days
17739 Aaron1011
author:Aaron1011
 feat(Topology/Order/DenselyOrdered): prove Not (IsOpen) for intervals Prove that Iic/Ici/Ioc/Ico/Icc intervals are not open in densely ordered topologies with no min/max element --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict awaiting-author t-topology new-contributor 27/0 Mathlib/Topology/Order/DenselyOrdered.lean 1 8 ['github-actions', 'vihdzp'] nobody
492-12837
1 year ago
585-4407
585 days ago
0-4704
1 hour
18474 FR-vdash-bot
author:FR-vdash-bot
 perf: lower the priority of `*WithOne.to*` instances --- From #7873. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict slow-typeclass-synthesis t-algebra t-data
label:t-algebra$
 9/2 Mathlib/Algebra/Polynomial/BigOperators.lean,Mathlib/Data/Int/Cast/Defs.lean,Mathlib/Data/Nat/Cast/Defs.lean 3 7 ['astrainfinita', 'eric-wieser', 'github-actions', 'leanprover-bot'] nobody
492-12592
1 year ago
492-12592
492 days ago
76-66907
76 days
20656 Komyyy
author:Komyyy
 feat(Mathlib/Geometry/Manifold/VectorBundle/Sphere): convert orthogonal smooth `M → 𝕊ⁿ` & `M → ℝⁿ⁺¹` to smooth `M → T𝕊ⁿ` Current Mathlib has no easy way to define function from a manifold to tangent bundles of sphere: `T𝕊ⁿ`. This PR gives this: `sphereTangentMap`. This convert orthogonal smooth `M → 𝕊ⁿ` & `M → ℝⁿ⁺¹` to smooth `M → T𝕊ⁿ`. I also proved that if `f : M → 𝕊ⁿ` & `g : M → ℝⁿ⁺¹` are smooth then `sphereTangentMap` of `f` & `g` is smooth too. --- ⚠ **CAUTION** I formalized this in my spare time. I don't have the energy to maintain the PR, but I create this PR so this may helps everyone. The only one thing to do is proof cleanup. TODO: - [x] `contDiff_uncurry_stereoInvFunAux` & `coe_sphere_comp_stereoInvFun` may have to be moved to `Mathlib.Geometry.Manifold.Instances.Sphere`. - [ ] Proof cleanup. Current proof may be redundant and ugly. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) please-adopt merge-conflict t-differential-geometry 246/6 Mathlib.lean,Mathlib/Geometry/Manifold/Instances/Sphere.lean,Mathlib/Geometry/Manifold/VectorBundle/Sphere.lean 3 1 ['github-actions'] nobody
491-47526
1 year ago
unknown
0-0
0 seconds
15711 znssong
author:znssong
 feat(Combinatorics/SimpleGraph): Some lemmas about walk, cycle and Hamiltonian cycle --- These lemmas are separated from the `meow-sister/BondyChvatal` branch and will be needed for the proof of the Bondy-Chvátal theorem. - [x] depends on: #15536 - [x] depends on: #16294 merge-conflict awaiting-author t-combinatorics new-contributor 407/3 Mathlib/Combinatorics/SimpleGraph/Finite.lean,Mathlib/Combinatorics/SimpleGraph/Hamiltonian.lean,Mathlib/Combinatorics/SimpleGraph/Path.lean,Mathlib/Combinatorics/SimpleGraph/Walk.lean 4 22 ['Rida-Hamadani', 'YaelDillies', 'github-actions', 'mathlib4-dependent-issues-bot', 'znssong'] nobody
491-31923
1 year ago
612-43084
612 days ago
9-13962
9 days
15720 znssong
author:znssong
 feat(SimpleGraph): The Bondy-Chvátal theorem The proof of the Bondy-Chvátal theorem, with Dirac's theorem and Ore's theorem as its corollary. - [x] depends on: #15536 - [ ] depends on: #15711 - [ ] depends on: #15578 merge-conflict blocked-by-other-PR t-combinatorics new-contributor 903/3 Mathlib.lean,Mathlib/Combinatorics/SimpleGraph/BondyChvatal.lean,Mathlib/Combinatorics/SimpleGraph/Finite.lean,Mathlib/Combinatorics/SimpleGraph/Hamiltonian.lean,Mathlib/Combinatorics/SimpleGraph/Path.lean,Mathlib/Combinatorics/SimpleGraph/Walk.lean,Mathlib/Dynamics/FixedPoints/Basic.lean,Mathlib/Dynamics/FixedPoints/Increasing.lean 8 3 ['github-actions', 'grunweg'] nobody
491-31923
1 year ago
648-49277
648 days ago
0-1791
29 minutes
18629 tomaz1502
author:tomaz1502
 feat(Computability.Timed): Formalization of runtime complexity of List.merge This PR adds the formalization of the runtime complexity of the merge function, defined in `Data/List/Sort`. Requires: https://github.com/leanprover-community/mathlib4/pull/15450 References: - Previous PR on mathlib3: https://github.com/leanprover-community/mathlib3/pull/14494/ - First discussion on Zulip: https://leanprover.zulipchat.com/#narrow/stream/113488-general/topic/BSc.20Final.20Project/near/220647062 - Second disussion on Zulip: https://leanprover.zulipchat.com/#narrow/stream/113488-general/topic/Formalization.20of.20Runtime.20Complexity.20of.20Sorting.20Algorithms/near/284184450 --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-computability awaiting-author new-contributor 186/0 Mathlib.lean,Mathlib/Computability/Timed/InsertionSort.lean,Mathlib/Computability/Timed/Merge.lean 3 2 ['github-actions', 'trivial1711'] nobody
490-84242
1 year ago
530-83855
530 days ago
33-11262
33 days
14412 jjaassoonn
author:jjaassoonn
 feat: show stalk of presheaf of modules is a module over stalk of ring --- - [x] depends on: #14413 - [ ] depends on: #14501 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-algebraic-geometry blocked-by-other-PR workshop-AIM-AG-2024 966/2 Mathlib.lean,Mathlib/Algebra/Category/ModuleCat/Presheaf/OverColimitsRing'.lean,Mathlib/Algebra/Category/ModuleCat/Presheaf/OverColimitsRing.lean,Mathlib/CategoryTheory/Filtered/Basic.lean,Mathlib/CategoryTheory/Limits/ConcreteCategory.lean,Mathlib/Geometry/RingedSpace/Basic.lean,Mathlib/Geometry/RingedSpace/Module.lean,Mathlib/Topology/Sheaves/Stalks.lean 8 5 ['github-actions', 'jjaassoonn', 'leanprover-community-mathlib4-bot', 'smorel394'] nobody
489-16425
1 year ago
unknown
0-0
0 seconds
8362 urkud
author:urkud
 feat(Asymptotics): define `ReflectsGrowth` --- - [x] depends on: #8349 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict awaiting-author t-analysis 268/0 Mathlib.lean,Mathlib/Analysis/Asymptotics/ReflectsGrowth.lean 2 14 ['YaelDillies', 'fpvandoorn', 'github-actions', 'leanprover-community-mathlib4-bot', 'urkud'] nobody
489-5096
1 year ago
680-56923
680 days ago
240-47513
240 days
6692 prakol16
author:prakol16
 feat: disjoint indexed union of local homeomorphisms Add disjoint indexed union of local equivs and local homeomorphisms --- This is leading up to PRing some things related to covering spaces that I wrote a long time ago in lean 3 but never submitted a PR for. Note that this was converted using mathport. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict awaiting-author t-topology 126/0 Mathlib/Logic/Equiv/PartialEquiv.lean,Mathlib/Topology/PartialHomeomorph.lean 2 4 ['alreadydone', 'github-actions', 'winstonyin'] nobody
488-76092
1 year ago
580-86111
580 days ago
118-5497
118 days
18461 hannahfechtner
author:hannahfechtner
 feat: left and right common multiples mixins add mixins for left and right common multiples. These carry the data of what factors are used to create the common multiples --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) awaiting-author t-algebra new-contributor
label:t-algebra$
 78/0 Mathlib/Algebra/Group/Defs.lean 1 13 ['github-actions', 'hannahfechtner', 'jcommelin', 'kbuzzard', 'kim-em', 'trivial1711'] nobody
487-45422
1 year ago
487-45422
487 days ago
69-35596
69 days
19291 PieterCuijpers
author:PieterCuijpers
 feat(Algebra/Order/Hom): add quantale homomorphism Definition of quantale homomorphisms as functions that are both semigroup homomorphisms and complete lattice homomorphisms. --- - [x] depends on: #19810 - [x] depends on: #19811 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict awaiting-author t-algebra new-contributor
label:t-algebra$
 209/0 Mathlib.lean,Mathlib/Algebra/Order/Hom/Quantale.lean,scripts/noshake.json 3 29 ['PieterCuijpers', 'YaelDillies', 'github-actions', 'kim-em', 'mathlib4-dependent-issues-bot'] nobody
486-19501
1 year ago
491-73302
491 days ago
29-51482
29 days
19352 hrmacbeth
author:hrmacbeth
 chore: change some `nlinarith`s to `linear_combination`s --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict WIP 13/13 Archive/Imo/Imo2021Q1.lean,Archive/Wiedijk100Theorems/AreaOfACircle.lean,Mathlib/Analysis/Normed/Group/AddCircle.lean,Mathlib/Analysis/Normed/Group/Basic.lean,Mathlib/Analysis/Normed/Ring/Units.lean,Mathlib/Analysis/SpecialFunctions/Complex/LogBounds.lean,Mathlib/Combinatorics/SimpleGraph/Regularity/Increment.lean,Mathlib/NumberTheory/Modular.lean 8 4 ['github-actions', 'hrmacbeth', 'leanprover-bot'] nobody
484-48712
1 year ago
546-60417
546 days ago
0-8636
2 hours
20372 jvlmdr
author:jvlmdr
 feat(MeasureTheory/Function): Add ContinuousLinearMap.bilinearCompLp(L) Introduce ContinuousLinearMap.bilinearCompLp and bilinearCompLpL. Generalize eLpNorm_le_eLpNorm_mul_eLpNorm theorems to include constant C in bound condition. --- Expect this may be useful for defining tempered distributions from functions in `L^p`. The definitions more or less follow `ContinuousLinearMap.compLp...`. Names are loosely analogous to `ContinuousLinearMap.bilinearComp` and `SchwartzMap.bilinLeftCLM`. Note: I preferred the spelling `hpqr : p⁻¹ + q⁻¹ = r⁻¹` with `f` in `L^p` and `g` in `L^q` to `hpqr : 1 / p = 1 / q + 1 / r`. It's easier to obtain from `ENNReal.IsConjExponent` too. A few questions: - [ ] I defined `bilinear{Left,Right}LpL` in addition to `bilinearCompLpL` because `LinearMap.mkContinuous₂` is marked as `noncomputable` and `LinearMap.mkContinuous` is not. Is this worth the extra definitions? (Note: This is not visible in the source due to `noncomputable section`.) - [ ] Should I use `C : ℝ` instead of `C : NNReal` for `eLpNorm_le_eLpNorm_mul_eLpNorm'_of_norm'`? - [ ] Is it going to be painful to have `[Fact (1 ≤ p)] [Fact (1 ≤ q)] [Fact (1 ≤ r)]`? I don't think there's a way to avoid it though. Maybe providing specialized versions for `p.IsConjExponent q` with `L^1`? Naming: - [ ] Is it satisfactory to add a `'` to the `eLpNorm_le_eLpNorm_mul_eLpNorm ` definitions in `CompareExp.lean` where `≤ ‖f x‖ * ‖g x‖` has been replaced with `≤ C * ‖f x‖ * ‖g x‖`? These could replace the existing theorems, although I don't want to break backwards compatibility. There are 5 instances: `eLpNorm_le_eLpNorm_top_mul_eLpNorm'`, `eLpNorm_le_eLpNorm_mul_eLpNorm_top'`, `eLpNorm'_le_eLpNorm'_mul_eLpNorm''`, `eLpNorm_le_eLpNorm_mul_eLpNorm_of_nnnorm'`, `eLpNorm_le_eLpNorm_mul_eLpNorm'_of_norm'` (I'm not sure why the existing theorem `eLpNorm_le_eLpNorm_mul_eLpNorm'_of_norm` has an internal `'`) - [ ] Is `bilinearLeftLpL` a suitable name? Other options: `bilinearCompLpLeftL`, `bilinearCompLeftLpL`, `bilinLeftLpL` (analogous to `SchwartzMap.bilinLeftCLM`) [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-measure-probability new-contributor 203/40 Mathlib/MeasureTheory/Function/LpSeminorm/CompareExp.lean,Mathlib/MeasureTheory/Function/LpSpace.lean 2 1 ['github-actions'] nobody
479-36849
1 year ago
479-36849
479 days ago
27-43617
27 days
2605 eric-wieser
author:eric-wieser
 chore: better error message in linarith On this mwe: ```lean import Mathlib.Tactic.Linarith example (s : Set ℕ) (h : s = s) : 0 ≤ 1 := by linarith ``` this now indicates where the internal error is coming from. Is there a better way of chaining errors than this? --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict awaiting-author t-meta 12/1 Mathlib/Tactic/Linarith/Preprocessing.lean 1 3 ['Vierkantor', 'harahu', 'kim-em', 'mo271'] nobody
477-27442
1 year ago
1124-58981
1124 days ago
51-42225
51 days
11837 trivial1711
author:trivial1711
 feat: completion of a uniform multiplicative group Multiplicativize `Topology.Algebra.GroupCompletion`. That is, rewrite it in the multiplicative setting and recover the original results using `@[to_additive]`. - Because `@[to_additive]` doesn't work with `noncomputable section` (https://github.com/leanprover/lean4/pull/2610), some instances with `@[to_additive]` need to be explicitly marked with `noncomputable instance`. - One might be tempted to multiplicativize this definition from `Topology.Algebra.GroupCompletion`: ```lean instance [UniformSpace α] [Add α] : Add (Completion α) := ⟨Completion.map₂ (· + ·)⟩ ``` to this: ```lean @[to_additive] instance [UniformSpace α] [Mul α] : Mul (Completion α) := ⟨Completion.map₂ (· * ·)⟩ ``` However, as Eric Wieser pointed out, doing so would create a bad diamond with the definition ```lean instance [UniformSpace α] [TopologicalRing α] [UniformAddGroup α] [Ring α] : Mul (Completion α) := ⟨curry <| (denseInducing_coe.prod denseInducing_coe).extend ((↑) ∘ uncurry (· * ·))⟩ ``` in `Topology.Algebra.UniformRing`. How should this diamond be resolved? Well, the definition of multiplication that uses `curry <| (denseInducing_coe.prod denseInducing_coe).extend ((↑) ∘ uncurry (· * ·))` is the "correct" one. For example, it yields the correct result if `α` is `ℚ`, unlike the definition that uses `Completion.map₂ (· * ·)`. (This is because `Completion.map₂` yields junk values if used on a function which is not uniformly continuous. Note, however, that if multiplication on `α` *is* uniformly continuous, then `Completion.map₂ (· * ·)` and `curry <| (denseInducing_coe.prod denseInducing_coe).extend ((↑) ∘ uncurry (· * ·))` are propositionally equal.) So, following Eric's suggestion, we remove the definition that uses `Completion.map₂ (· * ·)`, and generalize the other definition to any uniform space with a multiplication operation: ```lean @[to_additive] noncomputable instance [UniformSpace α] [Mul α] : Mul (Completion α) := ⟨curry <| (denseInducing_coe.prod denseInducing_coe).extend ((↑) ∘ uncurry (· * ·))⟩ ``` This requires slightly modifying some of the proofs in `Topology.Algebra.GroupCompletion`. For example, suppose that `α` is a uniform group. Since we can no longer use `Completion.continuous_map₂`, it becomes more efficient to prove that the multiplication, inversion, and division operations on `Completion α` are uniformly continuous *before* we prove that `Completion α` is a group. - Previously, `Topology.Algebra.GroupCompletion` had an instance: ```lean instance [UniformSpace α] [Sub α] : Sub (Completion α) := ... ``` Naively multiplicativizing this would yield ```lean @[to_additive] instance [UniformSpace α] [Inv α] : Inv (Completion α) := ... ``` Unfortunately, this would conflict with `Topology.Algebra.UniformField`, which already instantiates `Inv (Completion α)` when `α` is a uniform field. Instead, we use two different `instance` declarations. (If `α` is an additive group, then this instantiates `Neg (Completion α)` twice, and the instances are syntactically equal.) ```lean @[to_additive] noncomputable instance [UniformSpace α] [Group α] : Inv (Completion α) := ... instance [UniformSpace α] [Neg α] : Neg (Completion α) := ... ``` This avoids the bad diamond (because a uniform field can never be a `Group`) while remaining backward compatible. Note that the `@[to_additive]` is necessary here, because it maintains the link between the additive setting and multiplicative setting. We use a similar method to instantiate `Div (Completion α)`. - Some definitions in this file involve a module structure on `α`. We leave these as is and do not attempt to multiplicativize them at all. - The instance of `DistribMulAction` must be multiplicativized to an instance of `MulDistribMulAction` manually. Zulip thread: https://leanprover.zulipchat.com/#narrow/stream/287929-mathlib4/topic/Completion.20of.20a.20uniform.20multiplicative.20group --- # (Small) Issue Recall the following trick that this pull request uses to define inversion and negation on uniform spaces. The idea is that we define negation on the completion of any uniform space that has a negation operation, but we define inversion on only the completion of a uniform space that has the structure of a multiplicative group. We do this to avoid creating a bad diamond with the inversion operation on a uniform field. ```lean @[to_additive] noncomputable instance {α : Type*} [UniformSpace α] [Group α] : Inv (Completion α) := ... instance {α : Type*} [UniformSpace α] [Neg α] : Neg (Completion α) := ... ``` Now, suppose that we want to prove `coe_inv_of_group` (resp. `coe_neg`), which states that the coercion `α → Completion α` commutes with inversion (resp. negation). In the current version of this pull request, `coe_inv_of_group` (resp. `coe_neg`) only applies to uniform multiplicative (resp. additive) groups. However, we do not use the fact that multiplication (resp. addition) on `α` is uniformly continuous to prove it. We only use the fact that inversion (resp. negation) is continuous. So, what we really want is to have more general statements that look like this: ```lean theorem coe_inv_of_group {α : Type*} [UniformSpace α] [Group α] [ContinuousInv α] : ... theorem coe_neg {α : Type*} [UniformSpace α] [Neg α] [ContinuousNeg α] : ... ``` Note that `coe_inv_of_group` needs the assumption `[Group α]`, because otherwise inversion is not defined on `Completion α` at all. However, `coe_neg` does not need the analogous assumption `[AdditiveGroup α]`. The question is: If `coe_inv_of_group` and `coe_neg` are written in this more general form, how can we link them using `@[to_additive]`? Here is one option, but it obviously leaves something to be desired. ```lean @[to_additive coe_neg_do_not_use_this_use_the_more_general_version] theorem coe_inv_of_group {α : Type*} [UniformSpace α] [Group α] [ContinuousInv α] : ... theorem coe_neg {α : Type*} [UniformSpace α] [Neg α] [ContinuousNeg α] : ... ``` Co-authored-by: Eric Wieser --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) WIP t-algebra merge-conflict help-wanted t-topology
label:t-algebra$
 342/217 Mathlib/Analysis/InnerProductSpace/Completion.lean,Mathlib/Analysis/Normed/Group/HomCompletion.lean,Mathlib/Analysis/Normed/Module/Completion.lean,Mathlib/Topology/Algebra/GroupCompletion.lean,Mathlib/Topology/Algebra/InfiniteSum/GroupCompletion.lean,Mathlib/Topology/Algebra/Nonarchimedean/Completion.lean,Mathlib/Topology/Algebra/UniformField.lean,Mathlib/Topology/Algebra/UniformMulAction.lean,Mathlib/Topology/Algebra/UniformRing.lean 9 14 ['eric-wieser', 'github-actions', 'trivial1711'] nobody
477-4947
1 year ago
506-17226
506 days ago
101-63310
101 days
12670 trivial1711
author:trivial1711
 feat: completion of a nonarchimedean multiplicative group We prove that the completion of a nonarchimedean multiplicative group is a nonarchimedean multiplicative group. --- - [x] depends on: #12669 - [ ] depends on: #11837 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-algebra t-topology blocked-by-other-PR
label:t-algebra$
 358/228 Mathlib/Analysis/InnerProductSpace/Completion.lean,Mathlib/Analysis/Normed/Group/HomCompletion.lean,Mathlib/Analysis/Normed/Module/Completion.lean,Mathlib/Topology/Algebra/GroupCompletion.lean,Mathlib/Topology/Algebra/InfiniteSum/GroupCompletion.lean,Mathlib/Topology/Algebra/Nonarchimedean/Completion.lean,Mathlib/Topology/Algebra/UniformField.lean,Mathlib/Topology/Algebra/UniformMulAction.lean,Mathlib/Topology/Algebra/UniformRing.lean 9 2 ['github-actions', 'leanprover-community-mathlib4-bot'] nobody
477-4824
1 year ago
503-72680
503 days ago
50-17994
50 days
21384 alreadydone
author:alreadydone
 experiment: make submodule quotient reducibly defeq to additive group quotient --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra
label:t-algebra$
 1/1 Mathlib/LinearAlgebra/Quotient/Defs.lean 1 1 ['github-actions'] nobody
473-16589
1 year ago
unknown
0-0
0 seconds
9449 hmonroe
author:hmonroe
 feat: Add Turing machine with the quintet definition (TMQ) and a chainable step function for each TM type --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-computability awaiting-author 458/1 Mathlib/Computability/TuringMachine.lean,Mathlib/Logic/PartArith.lean 2 8 ['eric-wieser', 'github-actions', 'hmonroe'] nobody
471-56026
1 year ago
815-69078
815 days ago
53-6945
53 days
18719 FR-vdash-bot
author:FR-vdash-bot
 perf: lower the priority of `SemilinearMapClass.toAddHomClass` --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict slow-typeclass-synthesis t-algebra awaiting-bench
label:t-algebra$
 14/7 Mathlib/Algebra/Module/LinearMap/Defs.lean,Mathlib/Analysis/CStarAlgebra/ContinuousFunctionalCalculus/Unique.lean,MathlibTest/TCSynth.lean 3 4 ['astrainfinita', 'github-actions', 'leanprover-bot'] nobody
470-30843
1 year ago
unknown
0-0
0 seconds
19697 quangvdao
author:quangvdao
 feat(BigOperators/Fin): Sum/product over `Fin` intervals This PR adds new theorems about the sum/product of some vector over `Fin` intervals. One example is: ``` @[to_additive] theorem prod_Iic_succ (i : Fin n) : ∏ j ∈ Iic i.succ, v j = (∏ j ∈ Iic i.castSucc, v j) * v i.succ ``` --- - [x] depends on: #20360 This is in preparation for reworking `finSigmaFinEquiv` and `finProdFinEquiv` in #19013. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict awaiting-author t-data 87/12 Mathlib/Algebra/BigOperators/Fin.lean,Mathlib/Data/Fintype/Fin.lean,Mathlib/Order/Interval/Finset/Fin.lean 3 20 ['Ruben-VandeVelde', 'YaelDillies', 'eric-wieser', 'github-actions', 'mathlib4-dependent-issues-bot', 'quangvdao'] nobody
469-12044
1 year ago
503-47974
503 days ago
6-25961
6 days
19353 hrmacbeth
author:hrmacbeth
 chore: golf some term/rw proofs using `linear_combination` --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict WIP 47/102 Archive/Wiedijk100Theorems/SumOfPrimeReciprocalsDiverges.lean,Mathlib/Analysis/Convex/Slope.lean,Mathlib/Analysis/Seminorm.lean,Mathlib/MeasureTheory/Integral/RieszMarkovKakutani.lean,Mathlib/NumberTheory/Modular.lean,Mathlib/NumberTheory/Zsqrtd/Basic.lean,Mathlib/Topology/ContinuousMap/ZeroAtInfty.lean 7 5 ['github-actions', 'grunweg', 'hrmacbeth', 'leanprover-bot'] grunweg
assignee:grunweg
468-11165
1 year ago
546-60409
546 days ago
0-7781
2 hours
20248 peabrainiac
author:peabrainiac
 feat(Topology/Compactness): first-countable locally path-connected spaces are delta-generated Shows that all first-countable locally path-connected spaces are delta-generated (so in particular all normed spaces and convex subsets thereof are), and that delta-generated spaces are equivalently generated by the unit interval or standard simplices. --- - [ ] depends on: #21616 In principle, this should be close to all that's required to show that all simplicial complexes and CW-complexes are delta-generated; I just haven't done it yet because I'm not sure which file to best do it in. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) blocked-by-other-PR large-import new-contributor merge-conflict awaiting-author t-topology 1189/813 Mathlib.lean,Mathlib/Geometry/Manifold/ChartedSpace.lean,Mathlib/Topology/Algebra/Module/LocallyConvex.lean,Mathlib/Topology/Compactness/DeltaGeneratedSpace.lean,Mathlib/Topology/Connected/LocPathConnected.lean,Mathlib/Topology/Connected/PathConnected.lean,Mathlib/Topology/ContinuousOn.lean,Mathlib/Topology/Homotopy/HSpaces.lean,Mathlib/Topology/Path.lean 9 22 ['YaelDillies', 'github-actions', 'kbuzzard', 'mathlib4-dependent-issues-bot', 'peabrainiac'] nobody
466-80559
1 year ago
473-45076
473 days ago
39-21495
39 days
21610 JLimperg
author:JLimperg
 Aesop forward benchmark: forward precomp Not a real PR, just for benchmarking. merge-conflict 30/27 Mathlib/Data/List/InsertIdx.lean,Mathlib/Tactic/Recall.lean,Mathlib/Topology/List.lean,Test.lean,lake-manifest.json,lakefile.lean,lean-toolchain 7 3 ['JLimperg', 'github-actions', 'leanprover-bot'] nobody
466-30050
1 year ago
unknown
0-0
0 seconds
21611 JLimperg
author:JLimperg
 Aesop forward benchmark: master no-precomp Not a real PR, just for benchmarking. merge-conflict 30/27 Mathlib/Data/List/InsertIdx.lean,Mathlib/Tactic/Recall.lean,Mathlib/Topology/List.lean,Test.lean,lake-manifest.json,lakefile.lean,lean-toolchain 7 4 ['JLimperg', 'github-actions', 'leanprover-bot'] nobody
466-30049
1 year ago
unknown
0-0
0 seconds
21612 JLimperg
author:JLimperg
 Aesop forward benchmark: master precomp Not a real PR, just for benchmarking. merge-conflict 30/27 Mathlib/Data/List/InsertIdx.lean,Mathlib/Tactic/Recall.lean,Mathlib/Topology/List.lean,Test.lean,lake-manifest.json,lakefile.lean,lean-toolchain 7 3 ['JLimperg', 'github-actions', 'leanprover-bot'] nobody
466-30048
1 year ago
unknown
0-0
0 seconds
10678 adri326
author:adri326
 feat(Topology/UniformSpace): prove that a uniform space is completely regular Provides the pseudometric definition of a uniform space (for any open set `s` and `x ∈ s`, there exists a finite family of pseudometric spaces on `X` and an `ε > 0`, such that the intersection of the balls of these pseudometric spaces is a subset of `s`), and uses it to prove that `UniformSpace X` implies `CompletelyRegularSpace X`. --- This PR aims to close the gap of pi-base's theorem [T345](https://topology.pi-base.org/theorems/T000345), which says that topological groups are completely regular. We already have a proof that topological groups are uniform, but it turns out that we do not have any connection between `UniformSpace X` and `CompletelyRegularSpace X`. There is an equivalence between `UniformSpace X` and `CompletelyRegularSpace X`: the former implies the latter, and the latter implies *the existence of* the former. This PR provides the first half of this equivalence. The construction of the pseudometric definition is based on N. Bourbaki, Chapter 9, Theorem 4.1 The proof that a uniform space is completely regular is based on [the outline on mathexchange](https://math.stackexchange.com/questions/494718/how-to-prove-that-every-uniform-space-is-completely-regular). I tried to outline the major steps of the different proofs inside of comments; I can happily be more verbose to clear up any confusion. See [the corresponding Zulip discussion](https://leanprover.zulipchat.com/#narrow/stream/287929-mathlib4/topic/Some.20missing.2C.20accessible.2C.20topology.20results) for more context. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict awaiting-author t-topology 332/0 Mathlib.lean,Mathlib/Topology/UniformSpace/Basic.lean,Mathlib/Topology/UniformSpace/CompletelyRegular.lean 3 6 ['ADedecker', 'adri326'] ADedecker
assignee:ADedecker
466-5576
1 year ago
807-29255
807 days ago
17-44804
17 days
18785 erdOne
author:erdOne
 feat(CategoryTheory): command that generates instances for `MorphismProperty` Co-authored-by: Calle Sönne --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict awaiting-author t-category-theory t-meta 369/0 Mathlib.lean,Mathlib/CategoryTheory/MorphismProperty/Tactic.lean,MathlibTest/AddMorphismPropertyInstances.lean,scripts/noshake.json 4 19 ['alexjbest', 'chrisflav', 'erdOne', 'github-actions', 'grunweg', 'jcommelin', 'joelriou'] nobody
464-22086
1 year ago
485-50356
485 days ago
52-4682
52 days
16311 madvorak
author:madvorak
 feat(Computability): regular languages are context-free --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict WIP t-computability 72/0 Mathlib.lean,Mathlib/Computability/Chomsky.lean,Mathlib/Computability/ContextFreeGrammar.lean 3 7 ['Rida-Hamadani', 'YaelDillies', 'github-actions', 'madvorak'] nobody
462-28505
1 year ago
unknown
0-0
0 seconds
19943 AlexLoitzl
author:AlexLoitzl
 feat(Computability): Add Chomsky Normal Form Grammar and translation - Define Chomsky normal form grammars - Add language-preserving translation between context-free grammars and Chomsky normal form grammars Co-authored-by: Martin Dvorak martin.dvorak@matfyz.cz --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-computability awaiting-author new-contributor 3151/0 Mathlib.lean,Mathlib/Computability/ChomskyNormalForm/Basic.lean,Mathlib/Computability/ChomskyNormalForm/EmptyElimination.lean,Mathlib/Computability/ChomskyNormalForm/LengthRestriction.lean,Mathlib/Computability/ChomskyNormalForm/TerminalRestriction.lean,Mathlib/Computability/ChomskyNormalForm/Translation.lean,Mathlib/Computability/ChomskyNormalForm/UnitElimination.lean,Mathlib/Computability/ContextFreeGrammar.lean 8 59 ['AlexLoitzl', 'YaelDillies', 'github-actions', 'kim-em', 'madvorak'] nobody
462-28258
1 year ago
469-39880
469 days ago
37-29014
37 days
21501 sksgurdldi
author:sksgurdldi
 feat(List): add sum_zipWith_eq_finset_sum ### **Description:** This PR adds the lemma `List.sum_zipWith_eq_finset_sum` to `Mathlib.Algebra.BigOperators.Group.Finset.Basic`. #### **Statement:** The sum of the `zipWith` operation on two lists equals the sum of applying the operation to corresponding elements of the two lists, indexed over the minimum of their lengths. #### **Formal Statement:** ```lean lemma sum_zipWith_eq_finset_sum [Inhabited α] [Inhabited β] [AddCommMonoid γ] {op : α → β → γ} (l : List α) (m : List β) : (List.zipWith op l m).sum = ∑ x ∈ (Finset.range (Nat.min l.length m.length)), op (l[x]!) (m[x]!) ``` #### **Remarks:** - This lemma provides a useful equivalence between `List.zipWith` and summation over a `Finset.range` indexed by `Nat.min l.length m.length`. - It can be helpful in algebraic manipulations involving list-based summations. #### **Dependencies:** No additional dependencies. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) awaiting-author t-algebra new-contributor
label:t-algebra$
 43/0 Mathlib/Algebra/BigOperators/Group/Finset/Basic.lean 1 1 ['github-actions', 'j-loreaux'] nobody
456-83429
1 year ago
456-83429
456 days ago
13-33168
13 days
12054 adomani
author:adomani
 feat: auto-bugs This PR introduces a linter for suggesting bugs in tactics. See * #12077 * #12083 * #12084 for some bugs exposed by the test suite. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict awaiting-author t-meta 737/0 Mathlib.lean,Mathlib/Tactic.lean,Mathlib/Tactic/Linter/MetaTesting.lean,scripts/noshake.json,test/MetaTesting.lean 5 20 ['adomani', 'eric-wieser', 'github-actions', 'joneugster', 'kim-em'] joneugster
assignee:joneugster
456-71086
1 year ago
669-43104
669 days ago
45-6051
45 days
5062 adomani
author:adomani
 feat(Tactic/Prune + test/Prune): add `prune` tactic, for removing unnecessary hypotheses This tactic removes very conservatively all local declarations that 1. do not appear in the main goal, 2. do not appear in a declaration that appears in the main goal, 3. ... and so on recursively. The main motivation for this tactic is that all available variables in the current `namespace/section` appear in the goal state, not just the ones that are needed for the statement to type-check. Using `prune` mitigates this situation. The tactic also admits an optional natural number argument: `prune n` removes all variables that have not appeared at the `(n+1)`-st stage in the above list. Thus, `prune 0` only leaves the variables needed for the statement to type-check. Also, for sufficiently large `n`, `prune n` is a synonym for `prune`. [Zulip discussion](https://leanprover.zulipchat.com/#narrow/stream/270676-lean4/topic/substitute.20for.20.60include.2Fomit.60.3F) --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict modifies-tactic-syntax awaiting-author t-meta 181/0 Mathlib.lean,Mathlib/Tactic.lean,Mathlib/Tactic/Prune.lean,test/Prune.lean 4 5 ['adomani', 'j-loreaux', 'kmill'] nobody
456-38393
1 year ago
877-23724
877 days ago
195-57118
195 days
22169 JLimperg
author:JLimperg
 Aesop forward benchmark: forward no-precomp naive Not a real PR, just for benchmarking. merge-conflict 31/27 Mathlib/Data/List/InsertIdx.lean,Mathlib/Tactic/Recall.lean,Mathlib/Topology/List.lean,Test.lean,lake-manifest.json,lakefile.lean,lean-toolchain 7 6 ['JLimperg', 'github-actions', 'leanprover-bot'] nobody
455-4057
1 year ago
unknown
0-0
0 seconds
21433 grunweg
author:grunweg
 chore: change more lemmas to be about enorm instead of nnnorm --- - [x] depends on: #21782 - [x] depends on: #21783 (and this PR modifies the file split, and file splits are painful to merge over) [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict awaiting-author carleson t-measure-probability 172/71 Mathlib/Analysis/Distribution/SchwartzSpace.lean,Mathlib/Analysis/Normed/Group/Basic.lean,Mathlib/Analysis/SpecialFunctions/Pow/NNReal.lean,Mathlib/Data/ENNReal/Basic.lean,Mathlib/MeasureTheory/Function/LpSeminorm/Basic.lean,Mathlib/MeasureTheory/Function/LpSeminorm/CompareExp.lean,Mathlib/MeasureTheory/Function/LpSpace/Basic.lean,Mathlib/MeasureTheory/Function/LpSpace/ContinuousFunctions.lean,Mathlib/MeasureTheory/Function/UniformIntegrable.lean 9 18 ['RemyDegenne', 'github-actions', 'grunweg', 'j-loreaux', 'mathlib4-dependent-issues-bot'] nobody
455-3246
1 year ago
461-85711
461 days ago
2-37989
2 days
22171 JLimperg
author:JLimperg
 Aesop forward benchmark: forward no-precomp naive rpinf pr-release Not a real PR, just for benchmarking. merge-conflict 31/27 Mathlib/Data/List/InsertIdx.lean,Mathlib/Tactic/Recall.lean,Mathlib/Topology/List.lean,Test.lean,lake-manifest.json,lakefile.lean,lean-toolchain 7 5 ['JLimperg', 'github-actions', 'leanprover-bot'] nobody
454-11930
1 year ago
unknown
0-0
0 seconds
20454 urkud
author:urkud
 chore(TangentCone): review names Also add some `@[simp]` attrs. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-analysis 201/139 Mathlib/Analysis/Analytic/IteratedFDeriv.lean,Mathlib/Analysis/Calculus/ContDiff/Basic.lean,Mathlib/Analysis/Calculus/ContDiff/Bounds.lean,Mathlib/Analysis/Calculus/ContDiff/Defs.lean,Mathlib/Analysis/Calculus/ContDiff/FTaylorSeries.lean,Mathlib/Analysis/Calculus/Deriv/Abs.lean,Mathlib/Analysis/Calculus/Deriv/Basic.lean,Mathlib/Analysis/Calculus/FDeriv/Add.lean,Mathlib/Analysis/Calculus/FDeriv/Basic.lean,Mathlib/Analysis/Calculus/FDeriv/Equiv.lean,Mathlib/Analysis/Calculus/FDeriv/Measurable.lean,Mathlib/Analysis/Calculus/FDeriv/RestrictScalars.lean,Mathlib/Analysis/Calculus/FDeriv/Symmetric.lean,Mathlib/Analysis/Calculus/IteratedDeriv/Lemmas.lean,Mathlib/Analysis/Calculus/MeanValue.lean,Mathlib/Analysis/Calculus/TangentCone.lean,Mathlib/Analysis/Calculus/Taylor.lean,Mathlib/Analysis/Calculus/VectorField.lean,Mathlib/Analysis/Convex/SpecificFunctions/Deriv.lean,Mathlib/Analysis/SpecialFunctions/Trigonometric/InverseDeriv.lean,Mathlib/Geometry/Manifold/Instances/Real.lean,Mathlib/Geometry/Manifold/IsManifold/Basic.lean,Mathlib/Geometry/Manifold/MFDeriv/UniqueDifferential.lean,Mathlib/Geometry/Manifold/VectorBundle/Tangent.lean,Mathlib/MeasureTheory/Integral/FundThmCalculus.lean 25 3 ['github-actions', 'sgouezel', 'urkud'] nobody
450-49826
1 year ago
500-3189
500 days ago
4-8272
4 days
21608 JLimperg
author:JLimperg
 Aesop forward benchmark: forward no-precomp rpinf pr-release Not a real PR, just for benchmarking. merge-conflict 38/29 Mathlib/Data/List/InsertIdx.lean,Mathlib/Data/Nat/Prime/Defs.lean,Mathlib/Tactic/Recall.lean,Mathlib/Topology/List.lean,Test.lean,lake-manifest.json,lakefile.lean,lean-toolchain 8 13 ['JLimperg', 'github-actions', 'leanprover-bot'] nobody
450-24559
1 year ago
unknown
0-0
0 seconds
21609 JLimperg
author:JLimperg
 Aesop forward benchmark: forward no-precomp Not a real PR, just for benchmarking. merge-conflict 38/29 Mathlib/Data/List/InsertIdx.lean,Mathlib/Data/Nat/Prime/Defs.lean,Mathlib/Tactic/Recall.lean,Mathlib/Topology/List.lean,Test.lean,lake-manifest.json,lakefile.lean,lean-toolchain 8 13 ['JLimperg', 'github-actions', 'leanprover-bot'] nobody
450-22923
1 year ago
unknown
0-0
0 seconds
16550 awainverse
author:awainverse
 feat(ModelTheory): A typeclass for languages expanding other languages Defines `L.Expands L'` to consist of a privileged injective inclusion, `L'.Inclusion L`, from `L'` to `L`, corresponding to one language being a subset of the other in set-theoretic foundations. Replaces `L.IsOrdered` with `L.Expands Language.order` and `L.OrderLHom` with `Language.order.Inclusion L` Redefines `leSymb` in terms of `Language.order.Inclusion L` Deletions: - `FirstOrder.Language.IsOrdered` - `FirstOrder.Language.OrderLHom` - `instance : IsOrdered Language.order` - `sum.instIsOrdered` --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict awaiting-author t-logic 97/43 Mathlib/ModelTheory/LanguageMap.lean,Mathlib/ModelTheory/Order.lean 2 9 ['YaelDillies', 'awainverse', 'github-actions'] nobody
450-2294
1 year ago
622-33525
622 days ago
0-61590
17 hours
10823 alexkeizer
author:alexkeizer
 feat: convert curried type functions into uncurried type functions Adds a conversion `TypeFun.ofCurried : CurriedTypeFun.{u, v} n -> TypeFun.{u, v} n`, where `CurriedTypeFun.{u,v} n` is a (def-eq) abbreviation for `Type u -> ... -> Type u -> Type v`, i.e., the type of *curried* functions taking `n` arguments of type `Type u` to return an element of `Type v`, and `TypeFun.{u, v} n` is an abbreviation for `TypeVec.{u} n -> Type v`. It is generally more idiomatic to define type functions with multiple arguments in the curried style, but in the QPF development we use the uncurried equivalent `TypeVec n -> Type _`. Thus, having a canonical conversion from curried functions to uncurried gives us a canonical way to ask if a curried type function, say `Sum` is a QPF (namely, "is there an instance of `MvQPF (TypeFun.ofCurried Sum)`"). --- This is code ported from https://github.com/alexkeizer/QpfTypes, where this conversion is crucial in presenting a high-level interface, in terms of idiomatic, curried, type functions to users, while being built on QPFs (and thus, uncurried typefunctions) underneath. There is also a conversion in the other direction, from uncurried to curried, which I've decided to PR later, to keep this PR smaller and hopefully easier to review. - [x] depends on: #10818 (all changes to `Fin2.lean` are part of 10818, not the current PR) [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict awaiting-author t-data 66/0 Mathlib.lean,Mathlib/Data/TypeFun.lean 2 9 ['YaelDillies', 'alexkeizer', 'github-actions', 'leanprover-community-mathlib4-bot'] nobody
447-14887
1 year ago
697-85887
697 days ago
15-9013
15 days
13648 urkud
author:urkud
 feat(Topology/Module): generalize `ContinuousLinearMap.compSL` Generalize `ContinuousLinearMap.compSL` to topological vector spaces. --- - [ ] depends on: #15217 This PR is not polished yet, but the main statement is there. @ADedecker This answers a question I asked you on Zulip a few months ago. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra merge-conflict awaiting-author t-topology t-analysis
label:t-algebra$
 23/18 Mathlib/Analysis/NormedSpace/OperatorNorm/Bilinear.lean,Mathlib/Topology/Algebra/Module/StrongTopology.lean 2 5 ['fpvandoorn', 'github-actions', 'mathlib4-dependent-issues-bot', 'urkud'] nobody
445-37977
1 year ago
683-20904
683 days ago
28-69042
28 days
19372 Command-Master
author:Command-Master
 find defeq abuse using diagnostics --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) - [ ] depends on: #19177 merge-conflict blocked-by-other-PR large-import 169/1 Mathlib.lean,Mathlib/Tactic.lean,Mathlib/Tactic/Linter.lean,Mathlib/Tactic/Linter/FindDefEqAbuse.lean,MathlibTest/FindDefEqAbuse.lean,lakefile.lean 6 2 ['github-actions', 'mathlib4-dependent-issues-bot'] nobody
445-37477
1 year ago
unknown
0-0
0 seconds
22408 JLimperg
author:JLimperg
 Aesop forward bench: precomp only rpinf --- Not a real PR (yet), just for benchmarking. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict dependency-bump 5/3 lake-manifest.json,lakefile.lean,scripts/bench/fake-root/lib/lean/libleanshared.so,scripts/bench/run 4 6 ['JLimperg', 'github-actions', 'leanprover-bot'] nobody
445-26381
1 year ago
unknown
0-0
0 seconds
20636 eric-wieser
author:eric-wieser
 feat: multiplication of intervals in rings --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) awaiting-author t-algebra
label:t-algebra$
 36/1 Mathlib/Algebra/Order/Interval/Basic.lean 1 16 ['Timeroot', 'YaelDillies', 'eric-wieser', 'github-actions'] nobody
444-9946
1 year ago
480-13723
480 days ago
17-17852
17 days
22340 sinhp
author:sinhp
 feat(CategoryTheory): Locally Cartesian Closed Categories (Beck-Chevalley Conditions) Building on top of the API of `ExponentiableMorphism` in #22321, we state and prove Beck-Chevalley conditions. This will be crucial for our development of polynomial functors along exponentiable morphisms. Co-authored-by: Emily Riehl --- - [ ] depends on: #22321 - [ ] depends on: #22319 - [ ] depends on: #21525 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) WIP blocked-by-other-PR t-category-theory large-import merge-conflict 1144/24 Mathlib.lean,Mathlib/CategoryTheory/Comma/Over/Basic.lean,Mathlib/CategoryTheory/Comma/Over/Pullback.lean,Mathlib/CategoryTheory/Comma/Over/Sections.lean,Mathlib/CategoryTheory/Galois/Examples.lean,Mathlib/CategoryTheory/LocallyCartesianClosed/Basic.lean,Mathlib/CategoryTheory/LocallyCartesianClosed/BeckChevalley.lean,docs/references.bib 8 2 ['github-actions', 'mathlib4-dependent-issues-bot'] nobody
443-26528
1 year ago
450-8455
450 days ago
0-17
17 seconds
21959 BGuillemet
author:BGuillemet
 feat(Topology/ContinuousMap): Stone-Weierstrass theorem for MvPolynomial Add the subalgebra of multivariate polynomials and prove it separates points, on the same model as `ContinuousMap/Polynomial.lean`. Prove the Stone-Weierstrass theorem and some variations for multivariate polynomials. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-topology new-contributor 285/1 Mathlib.lean,Mathlib/Topology/ContinuousMap/MvPolynomial.lean,Mathlib/Topology/ContinuousMap/StoneWeierstrass.lean 3 1 ['github-actions'] nobody
443-22870
1 year ago
443-22870
443 days ago
16-76141
16 days
19177 adomani
author:adomani
 test: the findDefEqAbuse linter This is a prototype, as per [this Zulip discussion](https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/Locating.20defeq.20abuse) --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict large-import 126/0 Mathlib.lean,Mathlib/Tactic.lean,Mathlib/Tactic/Linter.lean,Mathlib/Tactic/Linter/FindDefEqAbuse.lean,MathlibTest/FindDefEqAbuse.lean 5 1 ['github-actions'] nobody
441-24883
1 year ago
unknown
0-0
0 seconds
22359 adomani
author:adomani
 feat(whitespace): do not allow indented doc-strings In a doc-string, Do not allow the first character after the first line break to be a space. --- There are approximately 2.5k exceptions. I think that they should be unindented, judging from the sample that I looked at, but won't act on it, unless there is a clear plan to fix and merge this modification! --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict WIP t-linter large-import 222/70 Archive/Wiedijk100Theorems/BuffonsNeedle.lean,Mathlib.lean,Mathlib/Algebra/Module/SpanRank.lean,Mathlib/AlgebraicTopology/SimplicialSet/NerveAdjunction.lean,Mathlib/Analysis/Asymptotics/ExpGrowth.lean,Mathlib/Data/Matroid/Circuit.lean,Mathlib/Init.lean,Mathlib/Lean/Meta/RefinedDiscrTree/Encode.lean,Mathlib/LinearAlgebra/Dimension/StrongRankCondition.lean,Mathlib/LinearAlgebra/LinearIndependent/Basic.lean,Mathlib/LinearAlgebra/LinearIndependent/Defs.lean,Mathlib/Tactic.lean,Mathlib/Tactic/FunProp/Decl.lean,Mathlib/Tactic/FunProp/Theorems.lean,Mathlib/Tactic/Linter.lean,Mathlib/Tactic/Linter/DocString.lean,Mathlib/Topology/Path.lean,Mathlib/Topology/UnitInterval.lean,MathlibTest/LintDocstring.lean,lakefile.lean 20 1 ['github-actions'] nobody
441-23802
1 year ago
449-49875
449 days ago
0-2590
43 minutes
18470 FR-vdash-bot
author:FR-vdash-bot
 perf: lower the priority of `Normed*.to*` instances --- From #7873. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict slow-typeclass-synthesis t-algebra t-analysis
label:t-algebra$
 28/0 Mathlib/Analysis/Normed/Field/Basic.lean,Mathlib/Analysis/Normed/Group/Basic.lean 2 9 ['astrainfinita', 'github-actions', 'jcommelin', 'leanprover-bot'] nobody
438-80697
1 year ago
438-80697
438 days ago
129-16341
129 days
17368 Felix-Weilacher
author:Felix-Weilacher
 feat(Topology/Baire/BaireMeasurable): add the Kuratowski-Ulam theorem Add the Kuratowski-Ulam theorem, which one can think of as a "Fubini" for Baire category. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-topology 187/1 Mathlib/MeasureTheory/MeasurableSpace/Basic.lean,Mathlib/Order/Filter/Basic.lean,Mathlib/Topology/Baire/BaireMeasurable.lean,Mathlib/Topology/Constructions.lean,Mathlib/Topology/GDelta/Basic.lean 5 6 ['Felix-Weilacher', 'github-actions', 'urkud'] nobody
437-18366
1 year ago
574-29885
574 days ago
22-48725
22 days
8767 eric-wieser
author:eric-wieser
 refactor(Cache): tidy lake-manifest parsing in Cache This now respects local copies of Mathlib dependencies (though in practice these invalidate the *online* cache because to point to local copies of Mathlib, the hash for `lakefile.lean` and `lake-manifest.json` is first invalidated). --- - [x] depends on: #11492 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-meta 49/49 Cache/Hashing.lean,Cache/IO.lean,lake-manifest.json 3 8 ['digama0', 'eric-wieser', 'github-actions', 'leanprover-community-mathlib4-bot'] nobody
435-80429
1 year ago
617-46379
617 days ago
119-35643
119 days
22434 qawbecrdtey
author:qawbecrdtey
 feat(Mathlib/Analysis/Normed/Lp/WithLp): Added more instances for `WithLp` --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict awaiting-author t-analysis 51/22 Mathlib/Analysis/Normed/Lp/WithLp.lean 1 11 ['eric-wieser', 'github-actions', 'leanprover-bot', 'qawbecrdtey'] nobody
435-23468
1 year ago
441-79133
441 days ago
1-79072
1 day
15578 znssong
author:znssong
 feat(Function): Fixed points of function `f` with `f(x) >= x` We added some lemmas of fixed points of function `f` with `f(x) >= x`, where `f : α → α` is a function on a finite type `α`. This will be needed in proof of Bondy-Chvátal theorem. --- See also branch `meow-sister/BondyChvatal`. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict awaiting-author t-analysis new-contributor 82/0 Mathlib.lean,Mathlib/Dynamics/FixedPoints/Basic.lean,Mathlib/Dynamics/FixedPoints/Increasing.lean 3 32 ['Ruben-VandeVelde', 'YaelDillies', 'github-actions', 'urkud', 'vihdzp', 'znssong'] nobody
435-18696
1 year ago
618-21925
618 days ago
29-48368
29 days
22660 Ruben-VandeVelde
author:Ruben-VandeVelde
 chore: follow naming convention around Group.IsNilpotent --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-algebra
label:t-algebra$
 133/67 Mathlib/GroupTheory/Frattini.lean,Mathlib/GroupTheory/Nilpotent.lean,Mathlib/GroupTheory/SpecificGroups/ZGroup.lean 3 1 ['github-actions'] nobody
431-45125
1 year ago
431-45125
431 days ago
10-48025
10 days
13999 adomani
author:adomani
 feat: a linter to flag potential confusing conventions Currently, the linter flags all uses of * `a - b` where `a b : Nat`; * `a / b` where `a b : Nat` or `a b : Int`; * `a / 0` more or less whenever the type of `a` has a `0` and a division. This comes up often when starting to use Lean and hopefully the flag can help mitigate initial confusions. When the local context contains the relevant inequality/divisibility hypothesis, the linter is quiet. A recent [Zulip discussion](https://leanprover.zulipchat.com/#narrow/stream/113489-new-members/topic/not.20understanding.20deliberate.20error.20with.20.60ring.60.20over.20.E2.84.95/near/445879310) --- To make sure that the linter does not produce errors, #14007 activates the linter on "all" of mathlib. The expectation is that no error is thrown, just warnings. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-linter awaiting-author 251/0 Mathlib.lean,Mathlib/Tactic.lean,Mathlib/Tactic/Linter/Papercut.lean,MathlibTest/Papercut.lean 4 24 ['Julian', 'YaelDillies', 'adomani', 'eric-wieser', 'github-actions'] nobody
430-77159
1 year ago
691-54650
691 days ago
7-47589
7 days
19013 quangvdao
author:quangvdao
 feat(Algebra/BigOperators/Fin): Add `finSigmaFinEquiv` This PR adds `finSigmaFinEquiv` which is the equivalence `(i : Fin m) × Fin (n i) ≃ Fin (∑ i, n i)`. This is the dependent version of `finProdFinEquiv`. CI should be passing, but there are two things I'd like feedback on: 1. When defining the mappings, I have to consider `m = 0` separately. Is there a more uniform definition? 2. I'm proving this as a step toward defining `Fin.join`, which is the analogue of `List.join`. I can now technically define `Fin.join` as: ``` variable {a : Fin n → ℕ} {α : (i : Fin n) → (j : Fin (a i)) → Sort*} def join (v : (i : Fin n) → (j : Fin (a i)) → α i j) (k : Fin (∑ i, a i)) : α (finSigmaFinEquiv.invFun k).1 (finSigmaFinEquiv.invFun k).2 := v (finSigmaFinEquiv.invFun k).1 (finSigmaFinEquiv.invFun k).2 ``` but this looks horrible. This highly motivates refactoring `invFun` as two new definitions: ``` def func1 {n : ℕ} (a : Fin n → ℕ) (k : Fin (∑ i, a i)) : Fin n := sorry def func2 {n : ℕ} (a : Fin n → ℕ) (k : Fin (∑ i, a i)) : Fin (a (func1 a k)) := sorry ``` I'm not sure what to call these functions. The analogues in the non-dependent case are `divNat` and `modNat`. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict awaiting-author t-algebra
label:t-algebra$
 92/16 Mathlib/Algebra/BigOperators/Fin.lean 1 14 ['YaelDillies', 'eric-wieser', 'github-actions', 'quangvdao'] nobody
429-12792
1 year ago
550-77120
550 days ago
3-28829
3 days
20389 eric-wieser
author:eric-wieser
 feat: generalize results to `WithLp 0` --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-analysis 116/53 Mathlib/Analysis/Normed/Lp/PiLp.lean 1 1 ['github-actions'] nobody
428-1340
1 year ago
unknown
0-0
0 seconds
19227 adomani
author:adomani
 fix(CI): unwrap `lake test` in problem matcher ... and also add a `#guard_msgs` in `AssertImported` test, so that `lake test` properly fails. [Zulip discussion](https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/CI.3A.20noisy.20.22test.20mathlib.22/near/483126955) --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict awaiting-author CI 9/20 .github/build.in.yml,.github/workflows/bors.yml,.github/workflows/build.yml,.github/workflows/build_fork.yml,MathlibTest/AssertImported.lean 5 2 ['bryangingechen', 'github-actions'] nobody
426-31828
1 year ago
526-72499
526 days ago
22-71271
22 days
15774 kkytola
author:kkytola
 feat: Topology on `ENat` This PR may contain some results that are not in the PR that adds a toppology on `ENat`. --- The immediate motivation is to be able to make the right continuity statement of the extended floor function on `ENNReal`, when this floor function is made `ENat`valued as suggested in the PR review of #15269. The API here is modelled on the early parts of [the corresponding ENNReal file](https://leanprover-community.github.io/mathlib4_docs/Mathlib/Topology/Instances/ENNReal.html#top), although much of this case is more trivial. - [x] depends on: #15380 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict WIP t-topology t-order 161/9 Mathlib/Data/ENat/Basic.lean,Mathlib/Topology/Instances/ENat.lean 2 4 ['YaelDillies', 'github-actions', 'leanprover-community-mathlib4-bot'] nobody
421-75760
1 year ago
647-18903
647 days ago
0-6819
1 hour
16009 Command-Master
author:Command-Master
 acyclic graph --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict WIP t-combinatorics 232/0 Mathlib/Combinatorics/SimpleGraph/Acyclic.lean 1 1 ['github-actions'] nobody
420-23909
1 year ago
unknown
0-0
0 seconds
20222 eric-wieser
author:eric-wieser
 feat: generalize lemmas about derivatives Rather than creating a huge diff by shuffling things around, this generalizes everything in-place and swaps between `section`s for topological and normed vector spaces. The rationale for this approach is that: * we may further generalize the results of this file, and this avoids us jumbling up the order multiple times unnecessarily. * this greatly reduces the chance of merge conflicts --- - [ ] depends on: #21065 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict blocked-by-other-PR t-analysis 554/50 Mathlib/Analysis/Calculus/Deriv/Basic.lean,Mathlib/Analysis/Calculus/FDeriv/Basic.lean,MathlibTest/Recall.lean 3 8 ['adomani', 'eric-wieser', 'github-actions', 'leanprover-bot', 'mathlib4-dependent-issues-bot'] nobody
417-46028
1 year ago
480-59270
480 days ago
7-27718
7 days
21018 markimunro
author:markimunro
 feat(Data/Matrix): add file with key definitions and theorems about elementary row operations Prove that each elementary row operation is equivalent to a multiplication by an elementary matrix, has another row operation which inverts it, and that each elementary matrix has a left inverse. This is a very large PR and I understand it will take time. This is my first one and will likely have issues but I will be ready to answer questions/fix them as soon as possible. Co-authored-by: Christopher Lynch --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-data enhancement new-contributor merge-conflict awaiting-author 1230/0 Mathlib.lean,Mathlib/Data/Matrix/ElementaryRowOperations.lean,Mathlib/Data/Matrix/GaussianElimination.lean,Mathlib/Data/Matrix/GaussianEliminationOld,Mathlib/Data/Matrix/oldnames,et --hard 18533caba32,lean-toolchain 7 17 ['chrisflav', 'eric-wieser', 'github-actions', 'j-loreaux', 'markimunro'] nobody
416-54095
1 year ago
441-83051
441 days ago
23-22681
23 days
23514 eric-wieser
author:eric-wieser
 refactor: smooth over Lattice/LinearOrder inheritance This fixes the forgetful inheritance in `CompleteLinearOrder` and `ConditionallyCompleteLinearOrder`, which previously did not carry `compare` fields. (edit: moved to #23515) The following is the inheritance diagram before, where the dotted lines are manual instances. Note that every lattice typeclass that extends `LinearOrder` has to implement another dotted line edge, and remember to copy all the necessary data fields. ```mermaid graph TD LinearOrder --> Min,Max; LinearOrder --> PartialOrder; Lattice --> PartialOrder; CompleteLinearOrder --> Lattice; ConditionallyCompleteLinearOrder --> Lattice; LinearOrder-.-> Lattice; CompleteLinearOrder -.-> LinearOrder; ConditionallyCompleteLinearOrder -.-> LinearOrder; ``` This change introduces two new auxiliary typeclasses, to encapsulate these troublesome edges. `LinearOrderedLattice` can be thought of as `LinearOrder`, but with `sup`/`inf` instead of `min`/`max`. This is crucial, because it ensures the duplicate fields are merged in `extends CompleteLattice X, LinearOrderedLattice X`, which would not be the case for `extends CompleteLattice X, LinearOrder X`. The result is: ```mermaid graph TD LinearOrder --> Min,Max; LinearOrder --> LinearOrderBase; LinearOrderBase --> PartialOrder; Lattice --> PartialOrder; LinearOrderedLattice -.-> LinearOrder; LinearOrderedLattice --> LinearOrderBase; LinearOrderedLattice --> Lattice; CompleteLinearOrder --> LinearOrderedLattice; ConditionallyCompleteLinearOrder --> LinearOrderedLattice; ``` --- - [ ] depends on: #23515 - [ ] [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict 85/66 Mathlib/Algebra/Order/Group/Defs.lean,Mathlib/Algebra/Order/Monoid/Defs.lean,Mathlib/Order/Basic.lean,Mathlib/Order/CompleteLattice/Defs.lean,Mathlib/Order/ConditionallyCompleteLattice/Defs.lean,Mathlib/Order/Defs/LinearOrder.lean,Mathlib/Order/Lattice.lean 7 2 ['github-actions', 'mathlib4-dependent-issues-bot'] nobody
415-79925
1 year ago
416-84864
416 days ago
0-172
2 minutes
20746 JLimperg
author:JLimperg
 Aesop forward branch test --- This is not a real PR; I just want to benchmark this Aesop branch. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict 14/6 .github/workflows/build.yml,Mathlib/Data/Nat/Prime/Defs.lean,lake-manifest.json,lakefile.lean,scripts/bench/fake-root/lib/lean/libleanshared.so,scripts/bench/run 6 11 ['JLimperg', 'Kha', 'github-actions', 'leanprover-bot'] nobody
415-37331
1 year ago
unknown
0-0
0 seconds
22810 pechersky
author:pechersky
 feat(Counterexamples): metric space not induced by norm Because the distance is not homogeneous --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) - [x] depends on: #22845 merge-conflict WIP t-topology t-analysis 202/1 Counterexamples.lean,Counterexamples/NotBoundedSMulMetricSpace.lean,Mathlib.lean,Mathlib/Analysis/Normed/PiNat.lean,Mathlib/Topology/Algebra/Module/LocallyConvex.lean,Mathlib/Topology/MetricSpace/Polish.lean 6 21 ['eric-wieser', 'github-actions', 'loefflerd', 'mathlib4-dependent-issues-bot', 'pechersky'] nobody
415-29987
1 year ago
430-63478
430 days ago
0-82394
22 hours
13124 FR-vdash-bot
author:FR-vdash-bot
 chore: remove `CovariantClass` and `ContravariantClass` Lean cannot handle `CovariantClass` and `ContravariantClass` correctly - TC slowness - [Zulip](https://leanprover.zulipchat.com/#narrow/stream/287929-mathlib4/topic/TC.20slowness) - https://github.com/leanprover-community/mathlib4/issues/6646#issuecomment-1691792488 - It may also have made #6326 fail. - Needs a weird hack to find instance: #9252 --- - [x] depends on: #13154 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict WIP 602/486 Mathlib/Algebra/AddConstMap/Basic.lean,Mathlib/Algebra/Algebra/Operations.lean,Mathlib/Algebra/Algebra/Subalgebra/Pointwise.lean,Mathlib/Algebra/BigOperators/Group/Finset/Basic.lean,Mathlib/Algebra/BigOperators/Group/Multiset/Basic.lean,Mathlib/Algebra/Group/Subgroup/Pointwise.lean,Mathlib/Algebra/Group/Submonoid/Pointwise.lean,Mathlib/Algebra/Group/UniqueProds/Basic.lean,Mathlib/Algebra/Module/Submodule/Pointwise.lean,Mathlib/Algebra/MonoidAlgebra/Degree.lean,Mathlib/Algebra/Order/AddTorsor.lean,Mathlib/Algebra/Order/Group/Action.lean,Mathlib/Algebra/Order/Group/DenselyOrdered.lean,Mathlib/Algebra/Order/Group/Units.lean,Mathlib/Algebra/Order/GroupWithZero/Canonical.lean,Mathlib/Algebra/Order/GroupWithZero/Unbundled.lean,Mathlib/Algebra/Order/GroupWithZero/WithZero.lean,Mathlib/Algebra/Order/Monoid/Defs.lean,Mathlib/Algebra/Order/Monoid/Unbundled/Basic.lean,Mathlib/Algebra/Order/Monoid/Unbundled/Defs.lean,Mathlib/Algebra/Order/Monoid/Unbundled/OrderDual.lean,Mathlib/Algebra/Order/Monoid/Unbundled/WithTop.lean,Mathlib/Algebra/Order/Ring/Defs.lean,Mathlib/Algebra/Order/Ring/WithTop.lean,Mathlib/Algebra/Ring/Subring/Pointwise.lean,Mathlib/Algebra/Ring/Subsemiring/Pointwise.lean,Mathlib/Analysis/SumOverResidueClass.lean,Mathlib/Data/DFinsupp/Lex.lean,Mathlib/Data/Finsupp/Lex.lean,Mathlib/Data/NNRat/Defs.lean,Mathlib/GroupTheory/OrderOfElement.lean,Mathlib/Order/Filter/IsBounded.lean,Mathlib/Order/Filter/Pointwise.lean,Mathlib/Probability/Kernel/Defs.lean,Mathlib/RingTheory/Ideal/Pointwise.lean,Mathlib/RingTheory/Valuation/ValuationSubring.lean,Mathlib/Topology/Algebra/Order/LiminfLimsup.lean 37 6 ['MichaelStollBayreuth', 'astrainfinita', 'github-actions', 'leanprover-bot', 'mathlib4-dependent-issues-bot'] nobody
414-57964
1 year ago
unknown
0-0
0 seconds
15212 victorliu5296
author:victorliu5296
 feat: Add fundamental theorem of calculus-2 for Banach spaces add the Mean Value Theorem for Banach spaces to the library and include reference for the theorem statement This theorem states that if `f : X → Y` is differentiable along the line segment from `a` to `b`, then the change in `f` equals the integral of its derivative along this path. This extends the mean value theorem to Banach spaces. This can be used for the eventual proof of the Newton-Kantorovich theorem with 1 constant contained inside the added reference. Here is the discussion on Zulipchat: https://leanprover.zulipchat.com/#narrow/stream/287929-mathlib4/topic/Contributing.20FTC-2.20for.20Banach.20spaces t-measure-probability new-contributor merge-conflict awaiting-author t-analysis 60/1 Mathlib/MeasureTheory/Integral/FundThmCalculus.lean 1 3 ['github-actions', 'hrmacbeth', 'victorliu5296'] nobody
411-49084
1 year ago
605-26455
605 days ago
51-85104
51 days
22888 plp127
author:plp127
 perf: replace `Lean.Expr.swapBVars` with a better? implementation Replaces `Lean.Expr.swapBVars` with a version that traverses the expression. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) awaiting-author t-meta 14/12 Mathlib/Tactic/FunProp/ToBatteries.lean 1 23 ['eric-wieser', 'github-actions', 'joneugster', 'leanprover-bot', 'leanprover-community-mathlib4-bot', 'plp127'] eric-wieser and joneugster
assignee:eric-wieser assignee:joneugster
410-42129
1 year ago
431-5569
431 days ago
4-80306
4 days
15943 urkud
author:urkud
 feat: add `ProdQuotientMapSpace` --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-topology 731/11 Mathlib.lean,Mathlib/Topology/Basic.lean,Mathlib/Topology/Compactness/Compact.lean,Mathlib/Topology/Maps/ProdQuotient.lean 4 2 ['github-actions', 'leanprover-community-bot-assistant'] nobody
409-67456
1 year ago
unknown
0-0
0 seconds
22579 kvanvels
author:kvanvels
 doc(Topology/Defs/Induced): fix comments on three functions related to RestrictGenTopology --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-topology documentation awaiting-author 10/9 Mathlib/Topology/Defs/Induced.lean,Mathlib/Topology/RestrictGen.lean 2 4 ['github-actions', 'kvanvels', 'leanprover-community-bot-assistant', 'urkud'] nobody
408-55987
1 year ago
431-60364
431 days ago
12-18679
12 days
19771 robertylewis
author:robertylewis
 perf: qqify two functions in linarith --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-meta 17/24 Mathlib/Tactic/Linarith/Frontend.lean,Mathlib/Tactic/Linarith/Verification.lean 2 5 ['github-actions', 'grunweg', 'leanprover-bot', 'leanprover-community-bot-assistant', 'robertylewis'] nobody
408-35493
1 year ago
unknown
0-0
0 seconds
22308 plp127
author:plp127
 feat (Analysis/Convex): Generalize `Convex` lemmas to `StarConvex` This PR generalizes many lemmas assuming `Convex 𝕜 s` to assume `StarConvex 𝕜 0 s`. --- - [x] depends on: #22421 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict WIP t-analysis new-contributor 30/18 Mathlib/Analysis/Convex/Gauge.lean,Mathlib/Analysis/Convex/GaugeRescale.lean,Mathlib/Analysis/Convex/Star.lean,Mathlib/Analysis/LocallyConvex/AbsConvexOpen.lean 4 5 ['Paul-Lez', 'github-actions', 'leanprover-community-bot-assistant', 'mathlib4-dependent-issues-bot'] nobody
408-35004
1 year ago
unknown
0-0
0 seconds
21488 imbrem
author:imbrem
 feat(CategoryTheory/Monoidal): premonoidal categories Add support for premonoidal categories --- Still want to add support for: - Premonoidal braided/symmetric categories - The monoidal coherence theorem, which I've already ported in my `discretion` library - The `coherence` tactic, which should work fine for premonoidal categories too but wanted to get this in front of reviewers ASAP to make sure my general approach was alright [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-category-theory new-contributor 900/361 Mathlib/Algebra/Category/ModuleCat/Presheaf/Monoidal.lean,Mathlib/CategoryTheory/Bicategory/End.lean,Mathlib/CategoryTheory/GradedObject/Monoidal.lean,Mathlib/CategoryTheory/Localization/Monoidal.lean,Mathlib/CategoryTheory/Monoidal/Braided/Basic.lean,Mathlib/CategoryTheory/Monoidal/Category.lean,Mathlib/CategoryTheory/Monoidal/Center.lean,Mathlib/CategoryTheory/Monoidal/CoherenceLemmas.lean,Mathlib/CategoryTheory/Monoidal/Discrete.lean,Mathlib/CategoryTheory/Monoidal/End.lean,Mathlib/CategoryTheory/Monoidal/Free/Basic.lean,Mathlib/CategoryTheory/Monoidal/Functor.lean,Mathlib/CategoryTheory/Monoidal/FunctorCategory.lean,Mathlib/CategoryTheory/Monoidal/Mon_.lean,Mathlib/CategoryTheory/Monoidal/Opposite.lean,Mathlib/CategoryTheory/Monoidal/Transport.lean,Mathlib/Tactic/CategoryTheory/Monoidal/Datatypes.lean,Mathlib/Tactic/CategoryTheory/Monoidal/Normalize.lean,Mathlib/Tactic/CategoryTheory/Monoidal/PureCoherence.lean,Mathlib/Tactic/CategoryTheory/MonoidalComp.lean,MathlibTest/StringDiagram.lean 21 9 ['YaelDillies', 'github-actions', 'grunweg', 'imbrem', 'kim-em', 'leanprover-community-bot-assistant'] nobody
408-31272
1 year ago
408-31273
408 days ago
58-6026
58 days
21525 sinhp
author:sinhp
 feat(CategoryTheory): Locally Cartesian Closed Categories (Prelim) This PR defines the basic preliminaries for defining locally cartesian closed categories (LCCCs). In particular, using the calculus of mates we define certain natural isomorphisms involving `Over.star` and `Over.pullback` which will be crucial in defining the right adjoint to the pullback functor in the development of LCCCs. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-category-theory large-import 338/24 Mathlib/CategoryTheory/Comma/Over/Basic.lean,Mathlib/CategoryTheory/Comma/Over/Pullback.lean,Mathlib/CategoryTheory/Galois/Examples.lean 3 13 ['b-mehta', 'github-actions', 'joelriou', 'leanprover-community-bot-assistant', 'sinhp'] nobody
408-31270
1 year ago
408-31272
408 days ago
36-69400
36 days
22319 sinhp
author:sinhp
 feat(CategoryTheory): Locally Cartesian Closed Categories (Sections Right Adjoint) we define the `Over.sections` functor in the file `CategoryTheory.Comma.Over.Sections` and prove that it is a right adjoint to the `Over.star`, thereby solving an existing TODO in `Over.pullback` file. The `sections` functor is used to define the right adjoint to the pullback functor `Over.pullback` in the development of LCCCs. Moreover, the rest of added lemmas and theorems to `CategoryTheory.Comma.Over.Pullback` are crucial for the development of LCCCs in the next PR. --- - [ ] depends on: #21525 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict blocked-by-other-PR t-category-theory large-import 547/24 Mathlib.lean,Mathlib/CategoryTheory/Comma/Over/Basic.lean,Mathlib/CategoryTheory/Comma/Over/Pullback.lean,Mathlib/CategoryTheory/Comma/Over/Sections.lean,Mathlib/CategoryTheory/Galois/Examples.lean 5 3 ['github-actions', 'leanprover-community-bot-assistant', 'mathlib4-dependent-issues-bot'] nobody
408-30743
1 year ago
450-34778
450 days ago
0-2084
34 minutes
22321 sinhp
author:sinhp
 feat(CategoryTheory): Locally Cartesian Closed Categories (Definition) This PR defines locally cartesian closed categories in terms of existence of the pushforward functors (right adjoint to the pullback functor) for all morphisms. We develop basic API and prove the following: 1. Existence of the pushforward functors is equivalent to cartesian closed slices. 2. Any locally cartesian closed category with a terminal object is cartesian closed. 3. The slices of a locally cartesian closed category are locally cartesian closed. Some of the content is based on the project of formalization of polynomial functors at the Trimester "Prospect of Formal Mathematics" at the Hausdorff Institute (HIM) in Bonn. https://github.com/sinhp/Poly I found this implementation of locally cartesian closed categories amenable to polynomial functors formalization. Co-authored-by: Emily Riehl --- - [ ] depends on: #21525 - [ ] depends on: #22319 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict blocked-by-other-PR t-category-theory large-import 812/24 Mathlib.lean,Mathlib/CategoryTheory/Comma/Over/Basic.lean,Mathlib/CategoryTheory/Comma/Over/Pullback.lean,Mathlib/CategoryTheory/Comma/Over/Sections.lean,Mathlib/CategoryTheory/Galois/Examples.lean,Mathlib/CategoryTheory/LocallyCartesianClosed/Basic.lean 6 3 ['github-actions', 'leanprover-community-bot-assistant', 'mathlib4-dependent-issues-bot'] nobody
408-30743
1 year ago
450-33519
450 days ago
0-336
5 minutes
13653 adomani
author:adomani
 feat: the unusedSetOptionIn linter --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-linter large-import 199/0 Mathlib.lean,Mathlib/Algebra/Homology/HomotopyCategory/Triangulated.lean,Mathlib/Tactic.lean,Mathlib/Tactic/Linter.lean,Mathlib/Tactic/Linter/UnnecessarySetOptionIn.lean,MathlibTest/UnnecessarySetOptionIn.lean 6 15 ['adomani', 'github-actions', 'grunweg', 'leanprover-community-bot-assistant'] nobody
407-62108
1 year ago
unknown
0-0
0 seconds
19425 hrmacbeth
author:hrmacbeth
 perf: gcongr forward-reasoning adjustment This PR changes the "forward-reasoning" component of `gcongr`, rendering it more efficient, particularly in problems with a large number of variables/hypotheses in the context. Previously `gcongr` attempted to match *every* `LocalDecl` against *every* node in the parse tree using *each* of the five implemented `@[gcongr_forward]` mini-tactics: matching directly, matching after applying `symm`, matching after applying `le_of_lt`, etc etc. The new algorithm filters out the non-Prop `LocalDecl`s, and also adjusts the `@[gcongr_forward]` extensions so that, rather than re-apply the relevant lemmas (`symm`, `le_of_lt`, etc) at every node in the parse tree, the lemmas are applied in advance to the `LocalDecl`s and the result (if successful) stored. The performance effect on mathlib as a whole is miniscule, but it speeds up the profiler's count of "tactic execution of Mathlib.Tactic.GCongr" in the newly-added test from 257 ms to 47 ms, and has a similar effect on real-life examples in an analysis project of mine. Co-authored-by: Mario Carneiro --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) (Note that Mario provided the ideas but not the code, so please review with appropriate diligence!) merge-conflict awaiting-author 130/59 Mathlib/Order/Lattice.lean,Mathlib/Tactic/GCongr/Core.lean,Mathlib/Tactic/GCongr/ForwardAttr.lean,MathlibTest/GCongr/inequalities.lean 4 17 ['Vierkantor', 'github-actions', 'hrmacbeth', 'leanprover-bot', 'leanprover-community-bot-assistant'] Vierkantor
assignee:Vierkantor
407-43804
1 year ago
540-32221
540 days ago
1-41769
1 day
20873 vbeffara
author:vbeffara
 feat(Topology/Covering): path lifting and homotopy lifting This proves the existence and uniqueness of path and homotopy lifts through covering maps. --- I tried to separate as much of the proof as possible into separate PRs (which are already in Mathlib now), but the proof here relies on a monolithic construction of an explicit lift along a well-chosen subdivision, in `partial_lift`, with associated definitions. Only one standalone lean file added. An older WIP PR #10084 by Junyan Xu @alreadydone proves similar results using a very similar construction for path lifting, with a different argument to obtain continuity for homotopy lifting. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict awaiting-author t-topology new-contributor 281/1 Mathlib.lean,Mathlib/Topology/Covering/Basic.lean,Mathlib/Topology/Covering/Lift.lean 3 9 ['alreadydone', 'github-actions', 'grunweg', 'vbeffara'] nobody
407-34000
1 year ago
482-26760
482 days ago
5-5648
5 days
22817 peabrainiac
author:peabrainiac
 feat(CategoryTheory/Sites): local sites Defines local sites and shows that sheaves of types on them form a local topos, in that the global sections functor `Sheaf.Γ` has a right adjoint `Sheaf.codisc` that is fully faithful. --- - [x] depends on: #22816 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict WIP t-category-theory 263/0 Mathlib.lean,Mathlib/CategoryTheory/Limits/FunctorCategory/Shapes/Products.lean,Mathlib/CategoryTheory/Limits/Types.lean,Mathlib/CategoryTheory/Sites/GlobalSections.lean,Mathlib/CategoryTheory/Sites/LocalSite.lean,Mathlib/CategoryTheory/Sites/Sheaf.lean 6 4 ['github-actions', 'joelriou', 'mathlib4-dependent-issues-bot'] nobody
406-54009
1 year ago
437-55508
437 days ago
0-568
9 minutes
24040 astrainfinita
author:astrainfinita
 refactor: unbundle algebra from `(NonUnital){Seminormed, Normed}(Comm)Ring` --- - [ ] depends on: #23966 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra blocked-by-other-PR merge-conflict slow-typeclass-synthesis t-analysis
label:t-algebra$
 3775/3674 Archive/Imo/Imo1998Q2.lean,Counterexamples/LinearOrderWithPosMulPosEqZero.lean,Mathlib/Algebra/Algebra/RestrictScalars.lean,Mathlib/Algebra/Module/ZLattice/Basic.lean,Mathlib/Algebra/Module/ZLattice/Covolume.lean,Mathlib/Algebra/Order/Field/Canonical.lean,Mathlib/Algebra/Order/Field/Rat.lean,Mathlib/Algebra/Order/Floor/Ring.lean,Mathlib/Algebra/Order/GroupWithZero/Canonical.lean,Mathlib/Algebra/Order/GroupWithZero/Finset.lean,Mathlib/Algebra/Order/Hom/Monoid.lean,Mathlib/Algebra/Order/Nonneg/Field.lean,Mathlib/Algebra/Order/Nonneg/Ring.lean,Mathlib/Algebra/Order/Ring/Nat.lean,Mathlib/Analysis/Analytic/Basic.lean,Mathlib/Analysis/Analytic/CPolynomial.lean,Mathlib/Analysis/Analytic/CPolynomialDef.lean,Mathlib/Analysis/Analytic/ChangeOrigin.lean,Mathlib/Analysis/Analytic/Composition.lean,Mathlib/Analysis/Analytic/Constructions.lean,Mathlib/Analysis/Analytic/Inverse.lean,Mathlib/Analysis/Analytic/IsolatedZeros.lean,Mathlib/Analysis/Analytic/IteratedFDeriv.lean,Mathlib/Analysis/Analytic/Linear.lean,Mathlib/Analysis/Analytic/OfScalars.lean,Mathlib/Analysis/Analytic/Order.lean,Mathlib/Analysis/Analytic/Polynomial.lean,Mathlib/Analysis/Analytic/RadiusLiminf.lean,Mathlib/Analysis/Analytic/Uniqueness.lean,Mathlib/Analysis/Analytic/Within.lean,Mathlib/Analysis/Asymptotics/AsymptoticEquivalent.lean,Mathlib/Analysis/Asymptotics/Defs.lean,Mathlib/Analysis/Asymptotics/Lemmas.lean,Mathlib/Analysis/Asymptotics/SpecificAsymptotics.lean,Mathlib/Analysis/Asymptotics/TVS.lean,Mathlib/Analysis/Asymptotics/Theta.lean,Mathlib/Analysis/BoundedVariation.lean,Mathlib/Analysis/BoxIntegral/Basic.lean,Mathlib/Analysis/BoxIntegral/DivergenceTheorem.lean,Mathlib/Analysis/BoxIntegral/Integrability.lean,Mathlib/Analysis/BoxIntegral/Partition/Additive.lean,Mathlib/Analysis/BoxIntegral/Partition/Measure.lean,Mathlib/Analysis/CStarAlgebra/Basic.lean,Mathlib/Analysis/CStarAlgebra/CStarMatrix.lean,Mathlib/Analysis/CStarAlgebra/Classes.lean,Mathlib/Analysis/CStarAlgebra/ContinuousFunctionalCalculus/Basic.lean,Mathlib/Analysis/CStarAlgebra/ContinuousFunctionalCalculus/Instances.lean,Mathlib/Analysis/CStarAlgebra/ContinuousFunctionalCalculus/Integral.lean,Mathlib/Analysis/CStarAlgebra/ContinuousFunctionalCalculus/Isometric.lean,Mathlib/Analysis/CStarAlgebra/ContinuousLinearMap.lean,Mathlib/Analysis/CStarAlgebra/ContinuousMap.lean,Mathlib/Analysis/CStarAlgebra/Exponential.lean,Mathlib/Analysis/CStarAlgebra/GelfandDuality.lean,Mathlib/Analysis/CStarAlgebra/Matrix.lean,Mathlib/Analysis/CStarAlgebra/Module/Constructions.lean,Mathlib/Analysis/CStarAlgebra/Module/Defs.lean,Mathlib/Analysis/CStarAlgebra/Multiplier.lean,Mathlib/Analysis/CStarAlgebra/Spectrum.lean,Mathlib/Analysis/CStarAlgebra/Unitization.lean,Mathlib/Analysis/CStarAlgebra/lpSpace.lean,Mathlib/Analysis/Calculus/AddTorsor/AffineMap.lean,Mathlib/Analysis/Calculus/AddTorsor/Coord.lean,Mathlib/Analysis/Calculus/BumpFunction/Basic.lean,Mathlib/Analysis/Calculus/BumpFunction/Convolution.lean,Mathlib/Analysis/Calculus/BumpFunction/FiniteDimension.lean,Mathlib/Analysis/Calculus/BumpFunction/InnerProduct.lean,Mathlib/Analysis/Calculus/BumpFunction/Normed.lean,Mathlib/Analysis/Calculus/Conformal/InnerProduct.lean,Mathlib/Analysis/Calculus/Conformal/NormedSpace.lean,Mathlib/Analysis/Calculus/ContDiff/Basic.lean,Mathlib/Analysis/Calculus/ContDiff/Bounds.lean,Mathlib/Analysis/Calculus/ContDiff/CPolynomial.lean,Mathlib/Analysis/Calculus/ContDiff/Defs.lean,Mathlib/Analysis/Calculus/ContDiff/FTaylorSeries.lean,Mathlib/Analysis/Calculus/ContDiff/FaaDiBruno.lean,Mathlib/Analysis/Calculus/ContDiff/FiniteDimension.lean,Mathlib/Analysis/Calculus/ContDiff/Operations.lean,Mathlib/Analysis/Calculus/ContDiff/RCLike.lean,Mathlib/Analysis/Calculus/ContDiff/WithLp.lean,Mathlib/Analysis/Calculus/DSlope.lean,Mathlib/Analysis/Calculus/Deriv/Abs.lean,Mathlib/Analysis/Calculus/Deriv/Add.lean,Mathlib/Analysis/Calculus/Deriv/AffineMap.lean,Mathlib/Analysis/Calculus/Deriv/Basic.lean,Mathlib/Analysis/Calculus/Deriv/Comp.lean,Mathlib/Analysis/Calculus/Deriv/Inv.lean,Mathlib/Analysis/Calculus/Deriv/Inverse.lean,Mathlib/Analysis/Calculus/Deriv/Linear.lean,Mathlib/Analysis/Calculus/Deriv/Mul.lean,Mathlib/Analysis/Calculus/Deriv/Prod.lean,Mathlib/Analysis/Calculus/Deriv/Shift.lean,Mathlib/Analysis/Calculus/Deriv/Slope.lean,Mathlib/Analysis/Calculus/Deriv/Star.lean,Mathlib/Analysis/Calculus/Deriv/Support.lean,Mathlib/Analysis/Calculus/Deriv/ZPow.lean,Mathlib/Analysis/Calculus/DiffContOnCl.lean,Mathlib/Analysis/Calculus/FDeriv/Add.lean,Mathlib/Analysis/Calculus/FDeriv/Analytic.lean,Mathlib/Analysis/Calculus/FDeriv/Basic.lean,Mathlib/Analysis/Calculus/FDeriv/Bilinear.lean 630 5 ['astrainfinita', 'github-actions', 'leanprover-bot', 'leanprover-community-bot-assistant', 'mathlib4-dependent-issues-bot'] nobody
403-24703
1 year ago
unknown
0-0
0 seconds
16314 FR-vdash-bot
author:FR-vdash-bot
 chore(Data/Quot): deprecate `ind*'` APIs --- - [x] depends on: #16264 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-data 247/287 Counterexamples/CliffordAlgebraNotInjective.lean,Mathlib/Algebra/Colimit/Module.lean,Mathlib/Algebra/Lie/Quotient.lean,Mathlib/Algebra/Module/Torsion.lean,Mathlib/Algebra/RingQuot.lean,Mathlib/Analysis/SpecialFunctions/Trigonometric/Angle.lean,Mathlib/CategoryTheory/ConnectedComponents.lean,Mathlib/CategoryTheory/Subobject/Basic.lean,Mathlib/CategoryTheory/Subobject/FactorThru.lean,Mathlib/CategoryTheory/Subobject/Lattice.lean,Mathlib/Computability/Reduce.lean,Mathlib/Computability/Tape.lean,Mathlib/Data/List/Cycle.lean,Mathlib/Data/Multiset/MapFold.lean,Mathlib/Data/Multiset/ZeroCons.lean,Mathlib/Data/Quot.lean,Mathlib/Data/Setoid/Basic.lean,Mathlib/Data/Setoid/Partition.lean,Mathlib/FieldTheory/Fixed.lean,Mathlib/GroupTheory/Complement.lean,Mathlib/GroupTheory/Congruence/Basic.lean,Mathlib/GroupTheory/Congruence/Defs.lean,Mathlib/GroupTheory/Congruence/Hom.lean,Mathlib/GroupTheory/Coset/Basic.lean,Mathlib/GroupTheory/Coset/Defs.lean,Mathlib/GroupTheory/FreeAbelianGroup.lean,Mathlib/GroupTheory/GroupAction/Basic.lean,Mathlib/GroupTheory/GroupAction/Defs.lean,Mathlib/GroupTheory/GroupAction/Quotient.lean,Mathlib/GroupTheory/Index.lean,Mathlib/GroupTheory/MonoidLocalization/Basic.lean,Mathlib/GroupTheory/PGroup.lean,Mathlib/GroupTheory/Perm/Cycle/Concrete.lean,Mathlib/GroupTheory/PresentedGroup.lean,Mathlib/GroupTheory/QuotientGroup/Basic.lean,Mathlib/GroupTheory/QuotientGroup/Defs.lean,Mathlib/GroupTheory/SchurZassenhaus.lean,Mathlib/GroupTheory/Sylow.lean,Mathlib/LinearAlgebra/Alternating/DomCoprod.lean,Mathlib/LinearAlgebra/Projectivization/Basic.lean,Mathlib/LinearAlgebra/Quotient/Basic.lean,Mathlib/LinearAlgebra/Quotient/Defs.lean,Mathlib/MeasureTheory/Function/AEEqFun.lean,Mathlib/NumberTheory/Padics/PadicNumbers.lean,Mathlib/NumberTheory/RamificationInertia/Basic.lean,Mathlib/Order/Antisymmetrization.lean,Mathlib/Order/Category/PartOrd.lean,Mathlib/Order/Filter/Germ/Basic.lean,Mathlib/RepresentationTheory/GroupCohomology/Hilbert90.lean,Mathlib/RingTheory/AdicCompletion/Algebra.lean,Mathlib/RingTheory/AdicCompletion/Basic.lean,Mathlib/RingTheory/AdicCompletion/Functoriality.lean,Mathlib/RingTheory/AdjoinRoot.lean,Mathlib/RingTheory/Congruence/Basic.lean,Mathlib/RingTheory/Flat/FaithfullyFlat/Basic.lean,Mathlib/RingTheory/GradedAlgebra/HomogeneousLocalization.lean,Mathlib/RingTheory/Ideal/Cotangent.lean,Mathlib/RingTheory/Ideal/Norm/AbsNorm.lean,Mathlib/RingTheory/Ideal/Quotient/Basic.lean,Mathlib/RingTheory/Ideal/Quotient/Defs.lean,Mathlib/RingTheory/Ideal/Quotient/Operations.lean,Mathlib/RingTheory/Valuation/Quotient.lean,Mathlib/Topology/Algebra/Group/TopologicalAbelianization.lean,Mathlib/Topology/Algebra/InfiniteSum/Module.lean,Mathlib/Topology/Separation/Basic.lean 65 4 ['github-actions', 'leanprover-community-bot-assistant', 'mathlib4-dependent-issues-bot'] nobody
402-56236
1 year ago
402-56238
402 days ago
55-52030
55 days
23509 eric-wieser
author:eric-wieser
 refactor: Make ENNReal an abbrev The `Coe` instance becomes `CoeTC` to match what we do for `WithTop` (such that the priority kicks in) Probably we could have both copies and things would be ok. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) This includes part of #23750 merge-conflict t-data 22/66 Mathlib/Data/ENNReal/Basic.lean,Mathlib/Data/ENNReal/BigOperators.lean,Mathlib/Data/ENNReal/Operations.lean,Mathlib/MeasureTheory/Integral/SetToL1.lean,Mathlib/MeasureTheory/Measure/Sub.lean,Mathlib/MeasureTheory/Measure/TightNormed.lean,Mathlib/Topology/MetricSpace/PartitionOfUnity.lean 7 22 ['eric-wieser', 'github-actions', 'leanprover-bot', 'leanprover-community-bot-assistant', 'leanprover-community-mathlib4-bot', 'mattrobball', 'urkud'] nobody
402-39889
1 year ago
404-24617
404 days ago
5-23475
5 days
24060 eric-wieser
author:eric-wieser
 chore(MeasureTheory): use `0` instead of `const _ 0` --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-measure-probability 30/20 Mathlib/MeasureTheory/Function/SimpleFunc.lean,Mathlib/MeasureTheory/Function/SimpleFuncDense.lean,Mathlib/MeasureTheory/Function/SimpleFuncDenseLp.lean,Mathlib/MeasureTheory/Integral/Bochner/VitaliCaratheodory.lean,Mathlib/MeasureTheory/Integral/Lebesgue/Countable.lean,Mathlib/MeasureTheory/Integral/SetToL1.lean,Mathlib/Probability/StrongLaw.lean 7 2 ['github-actions', 'leanprover-community-bot-assistant'] nobody
402-29584
1 year ago
unknown
0-0
0 seconds
24058 FR-vdash-bot
author:FR-vdash-bot
 refactor: unbundle algebra from `*NormedField` --- - [ ] depends on: #24040 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra blocked-by-other-PR merge-conflict slow-typeclass-synthesis t-analysis
label:t-algebra$
 4602/4346 Archive/Hairer.lean,Archive/Imo/Imo1998Q2.lean,Counterexamples/LinearOrderWithPosMulPosEqZero.lean,Mathlib/Algebra/Algebra/RestrictScalars.lean,Mathlib/Algebra/Module/ZLattice/Basic.lean,Mathlib/Algebra/Module/ZLattice/Covolume.lean,Mathlib/Algebra/Order/Field/Canonical.lean,Mathlib/Algebra/Order/Field/Rat.lean,Mathlib/Algebra/Order/Floor/Ring.lean,Mathlib/Algebra/Order/GroupWithZero/Canonical.lean,Mathlib/Algebra/Order/GroupWithZero/Finset.lean,Mathlib/Algebra/Order/Hom/Monoid.lean,Mathlib/Algebra/Order/Nonneg/Field.lean,Mathlib/Algebra/Order/Nonneg/Ring.lean,Mathlib/Algebra/Order/Ring/Nat.lean,Mathlib/Analysis/Analytic/Basic.lean,Mathlib/Analysis/Analytic/CPolynomial.lean,Mathlib/Analysis/Analytic/CPolynomialDef.lean,Mathlib/Analysis/Analytic/ChangeOrigin.lean,Mathlib/Analysis/Analytic/Composition.lean,Mathlib/Analysis/Analytic/Constructions.lean,Mathlib/Analysis/Analytic/Inverse.lean,Mathlib/Analysis/Analytic/IsolatedZeros.lean,Mathlib/Analysis/Analytic/IteratedFDeriv.lean,Mathlib/Analysis/Analytic/Linear.lean,Mathlib/Analysis/Analytic/OfScalars.lean,Mathlib/Analysis/Analytic/Order.lean,Mathlib/Analysis/Analytic/Polynomial.lean,Mathlib/Analysis/Analytic/RadiusLiminf.lean,Mathlib/Analysis/Analytic/Uniqueness.lean,Mathlib/Analysis/Analytic/Within.lean,Mathlib/Analysis/Asymptotics/AsymptoticEquivalent.lean,Mathlib/Analysis/Asymptotics/Defs.lean,Mathlib/Analysis/Asymptotics/Lemmas.lean,Mathlib/Analysis/Asymptotics/SpecificAsymptotics.lean,Mathlib/Analysis/Asymptotics/SuperpolynomialDecay.lean,Mathlib/Analysis/Asymptotics/TVS.lean,Mathlib/Analysis/Asymptotics/Theta.lean,Mathlib/Analysis/BoundedVariation.lean,Mathlib/Analysis/BoxIntegral/Basic.lean,Mathlib/Analysis/BoxIntegral/DivergenceTheorem.lean,Mathlib/Analysis/BoxIntegral/Integrability.lean,Mathlib/Analysis/BoxIntegral/Partition/Additive.lean,Mathlib/Analysis/BoxIntegral/Partition/Measure.lean,Mathlib/Analysis/CStarAlgebra/Basic.lean,Mathlib/Analysis/CStarAlgebra/CStarMatrix.lean,Mathlib/Analysis/CStarAlgebra/Classes.lean,Mathlib/Analysis/CStarAlgebra/ContinuousFunctionalCalculus/Basic.lean,Mathlib/Analysis/CStarAlgebra/ContinuousFunctionalCalculus/Instances.lean,Mathlib/Analysis/CStarAlgebra/ContinuousFunctionalCalculus/Integral.lean,Mathlib/Analysis/CStarAlgebra/ContinuousFunctionalCalculus/Isometric.lean,Mathlib/Analysis/CStarAlgebra/ContinuousLinearMap.lean,Mathlib/Analysis/CStarAlgebra/ContinuousMap.lean,Mathlib/Analysis/CStarAlgebra/Exponential.lean,Mathlib/Analysis/CStarAlgebra/GelfandDuality.lean,Mathlib/Analysis/CStarAlgebra/Matrix.lean,Mathlib/Analysis/CStarAlgebra/Module/Constructions.lean,Mathlib/Analysis/CStarAlgebra/Module/Defs.lean,Mathlib/Analysis/CStarAlgebra/Multiplier.lean,Mathlib/Analysis/CStarAlgebra/Spectrum.lean,Mathlib/Analysis/CStarAlgebra/Unitization.lean,Mathlib/Analysis/CStarAlgebra/lpSpace.lean,Mathlib/Analysis/Calculus/AddTorsor/AffineMap.lean,Mathlib/Analysis/Calculus/AddTorsor/Coord.lean,Mathlib/Analysis/Calculus/BumpFunction/Basic.lean,Mathlib/Analysis/Calculus/BumpFunction/Convolution.lean,Mathlib/Analysis/Calculus/BumpFunction/FiniteDimension.lean,Mathlib/Analysis/Calculus/BumpFunction/InnerProduct.lean,Mathlib/Analysis/Calculus/BumpFunction/Normed.lean,Mathlib/Analysis/Calculus/Conformal/InnerProduct.lean,Mathlib/Analysis/Calculus/Conformal/NormedSpace.lean,Mathlib/Analysis/Calculus/ContDiff/Basic.lean,Mathlib/Analysis/Calculus/ContDiff/Bounds.lean,Mathlib/Analysis/Calculus/ContDiff/CPolynomial.lean,Mathlib/Analysis/Calculus/ContDiff/Defs.lean,Mathlib/Analysis/Calculus/ContDiff/FTaylorSeries.lean,Mathlib/Analysis/Calculus/ContDiff/FaaDiBruno.lean,Mathlib/Analysis/Calculus/ContDiff/FiniteDimension.lean,Mathlib/Analysis/Calculus/ContDiff/Operations.lean,Mathlib/Analysis/Calculus/ContDiff/RCLike.lean,Mathlib/Analysis/Calculus/ContDiff/WithLp.lean,Mathlib/Analysis/Calculus/DSlope.lean,Mathlib/Analysis/Calculus/Deriv/Abs.lean,Mathlib/Analysis/Calculus/Deriv/Add.lean,Mathlib/Analysis/Calculus/Deriv/AffineMap.lean,Mathlib/Analysis/Calculus/Deriv/Basic.lean,Mathlib/Analysis/Calculus/Deriv/Comp.lean,Mathlib/Analysis/Calculus/Deriv/Inv.lean,Mathlib/Analysis/Calculus/Deriv/Inverse.lean,Mathlib/Analysis/Calculus/Deriv/Linear.lean,Mathlib/Analysis/Calculus/Deriv/Mul.lean,Mathlib/Analysis/Calculus/Deriv/Pi.lean,Mathlib/Analysis/Calculus/Deriv/Polynomial.lean,Mathlib/Analysis/Calculus/Deriv/Pow.lean,Mathlib/Analysis/Calculus/Deriv/Prod.lean,Mathlib/Analysis/Calculus/Deriv/Shift.lean,Mathlib/Analysis/Calculus/Deriv/Slope.lean,Mathlib/Analysis/Calculus/Deriv/Star.lean,Mathlib/Analysis/Calculus/Deriv/Support.lean,Mathlib/Analysis/Calculus/Deriv/ZPow.lean 665 7 ['astrainfinita', 'github-actions', 'leanprover-bot', 'leanprover-community-bot-assistant', 'mathlib4-dependent-issues-bot'] nobody
402-19494
1 year ago
unknown
0-0
0 seconds
11455 adomani
author:adomani
 fix: unsqueeze simp, re Yaël's comments on #11259 This PR reverts/simplifies some of the "squeeze `simp`" changes in #11259. See #11259 for context. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict awaiting-author 3/6 Mathlib/Algebra/Group/Conj.lean,Mathlib/Data/Seq/WSeq.lean 2 8 ['Ruben-VandeVelde', 'YaelDillies', 'grunweg', 'loefflerd', 'robertylewis', 'urkud'] nobody
402-1489
1 year ago
700-31396
700 days ago
93-60645
93 days
7325 eric-wieser
author:eric-wieser
 chore: use preimageIso instead of defeq abuse for InducedCategory This makes a few things slightly more verbose, but the type casts are now explicit in those places. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-category-theory awaiting-CI 22/21 Mathlib/CategoryTheory/EssentialImage.lean,Mathlib/CategoryTheory/Monoidal/Braided.lean,Mathlib/CategoryTheory/Monoidal/Subcategory.lean 3 1 ['grunweg'] nobody
402-1368
1 year ago
unknown
0-0
0 seconds
7874 astrainfinita
author:astrainfinita
 chore: make `IsScalarTower A A B` and `IsScalarTower A B B` higher priority --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict slow-typeclass-synthesis t-algebra awaiting-CI
label:t-algebra$
 10/9 Mathlib/Algebra/Algebra/Defs.lean,Mathlib/Algebra/Group/Action/Defs.lean,Mathlib/Data/Rat/Cast/Defs.lean,Mathlib/GroupTheory/GroupAction/Ring.lean 4 3 ['astrainfinita', 'grunweg', 'leanprover-bot'] nobody
402-1343
1 year ago
unknown
0-0
0 seconds
13038 adomani
author:adomani
 feat: Mathlib weekly reports This PR introduces a weekly cron job that computes a "global" report on the evolution of Mathlib in the previous week. It consists of * a CI workflow with a cron job that runs at minight on Sunday (`.github/workflows/mathlib_stats.yaml`); * a Lean file extracting a categorized list of "all" the declarations in Mathlib (`scripts/count_decls.lean`); * a bash file computing Git-diff-related information and collating the data from the Lean file (`scripts/mathlib_stats.sh`); * a convenience CI workflow that is triggered on adding the `test-ci` label and results in posting on the PR and on Zulip the report (`.github/workflows/mathlib_stats_label.yaml`). The second CI workflow is intended to be removed just before/right after the PR is ready to merge. [Zulip discussion](https://leanprover.zulipchat.com/#narrow/stream/113488-general) [Thread for the reports](https://leanprover.zulipchat.com/#narrow/stream/287929-mathlib4/topic/Mathlib.20weekly.20change.20report) --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) awaiting-author CI t-meta 338/0 .github/workflows/mathlib_stats.yaml,.github/workflows/mathlib_stats_label.yaml,scripts/count_decls.lean,scripts/mathlib_stats.sh 4 10 ['adomani', 'github-actions', 'grunweg', 'kim-em', 'kmill'] nobody
402-1301
1 year ago
676-19181
676 days ago
57-4374
57 days
5952 eric-wieser
author:eric-wieser
 feat: add Qq wrappers for ToExpr --- - [ ] depends on: #6699 (to appease the linter) [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict awaiting-CI t-meta 247/150 Mathlib/Data/Fin/Basic.lean,Mathlib/Data/Fin/VecNotation.lean,Mathlib/Data/Matrix/Notation.lean,Mathlib/Tactic/DeriveToExpr.lean,Mathlib/Tactic/FBinop.lean,Mathlib/Tactic/ToExpr.lean,Mathlib/Util/Qq.lean,test/DeriveToExpr.lean,test/vec_notation.lean 9 7 ['eric-wieser', 'gebner', 'grunweg', 'leanprover-community-mathlib4-bot'] nobody
402-1169
1 year ago
1008-44432
1008 days ago
29-67421
29 days
15483 FR-vdash-bot
author:FR-vdash-bot
 chore(GroupTheory/Coset): reduce defeq abuse --- - [x] depends on: #15482 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-algebra
label:t-algebra$
 114/60 Mathlib/GroupTheory/Commensurable.lean,Mathlib/GroupTheory/Coset.lean,Mathlib/GroupTheory/QuotientGroup.lean,Mathlib/LinearAlgebra/Alternating/DomCoprod.lean,Mathlib/MeasureTheory/Measure/Haar/Quotient.lean,Mathlib/Topology/Algebra/Group/Compact.lean 6 14 ['astrainfinita', 'eric-wieser', 'github-actions', 'grunweg', 'leanprover-bot', 'leanprover-community-mathlib4-bot', 'mattrobball', 'mergify', 'urkud'] nobody
402-1129
1 year ago
650-39459
650 days ago
4-79214
4 days
16594 FR-vdash-bot
author:FR-vdash-bot
 perf: reorder `extends` and remove some instances in algebra hierarchy --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict slow-typeclass-synthesis t-algebra
label:t-algebra$
 240/92 Mathlib.lean,Mathlib/Algebra/Algebra/Hom.lean,Mathlib/Algebra/Associated/Basic.lean,Mathlib/Algebra/BigOperators/Ring/List.lean,Mathlib/Algebra/Field/Defs.lean,Mathlib/Algebra/GCDMonoid/Basic.lean,Mathlib/Algebra/Group/Defs.lean,Mathlib/Algebra/Group/Ext.lean,Mathlib/Algebra/Group/Opposite.lean,Mathlib/Algebra/Group/Prod.lean,Mathlib/Algebra/GroupWithZero/Defs.lean,Mathlib/Algebra/GroupWithZero/Prod.lean,Mathlib/Algebra/Homology/Embedding/Basic.lean,Mathlib/Algebra/Order/AddGroupWithTop.lean,Mathlib/Algebra/Order/Field/Canonical/Defs.lean,Mathlib/Algebra/Order/Field/Defs.lean,Mathlib/Algebra/Order/Group/Unbundled/Abs.lean,Mathlib/Algebra/Order/GroupWithZero/Canonical.lean,Mathlib/Algebra/Order/Ring/Canonical.lean,Mathlib/Algebra/Order/Ring/Defs.lean,Mathlib/Algebra/Polynomial/Roots.lean,Mathlib/Algebra/Quaternion.lean,Mathlib/Algebra/Ring/Defs.lean,Mathlib/Algebra/Ring/Ext.lean,Mathlib/Algebra/Ring/InjSurj.lean,Mathlib/Algebra/Ring/Rat.lean,Mathlib/Algebra/Ring/SumsOfSquares.lean,Mathlib/Algebra/Tropical/Basic.lean,Mathlib/Analysis/CStarAlgebra/ContinuousFunctionalCalculus/Order.lean,Mathlib/Analysis/InnerProductSpace/Symmetric.lean,Mathlib/CategoryTheory/Preadditive/FunctorCategory.lean,Mathlib/Data/Finset/NoncommProd.lean,Mathlib/Data/Int/Cast/Defs.lean,Mathlib/FieldTheory/IsAlgClosed/AlgebraicClosure.lean,Mathlib/FieldTheory/SplittingField/Construction.lean,Mathlib/GroupTheory/Congruence/Basic.lean,Mathlib/GroupTheory/MonoidLocalization/MonoidWithZero.lean,Mathlib/GroupTheory/Torsion.lean,Mathlib/LinearAlgebra/LinearPMap.lean,Mathlib/LinearAlgebra/TensorProduct/Basic.lean,Mathlib/Order/Filter/Germ/Basic.lean,Mathlib/Order/Interval/Finset/Box.lean,Mathlib/RingTheory/Bialgebra/Hom.lean,Mathlib/RingTheory/Coalgebra/Hom.lean,Mathlib/RingTheory/Ideal/Quotient.lean,Mathlib/RingTheory/Perfection.lean,Mathlib/RingTheory/TensorProduct/Basic.lean,Mathlib/RingTheory/TensorProduct/MvPolynomial.lean,Mathlib/Util/NoInstances.lean,scripts/noshake.json 50 8 ['astrainfinita', 'github-actions', 'grunweg', 'leanprover-bot'] nobody
402-905
1 year ago
606-40452
606 days ago
14-58900
14 days
24106 FR-vdash-bot
author:FR-vdash-bot
 refactor: unbundle algebra from `*CStarAlgebra` --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) - [ ] depends on: #24058 t-algebra blocked-by-other-PR merge-conflict slow-typeclass-synthesis t-analysis
label:t-algebra$
 4702/4459 Archive/Hairer.lean,Archive/Imo/Imo1998Q2.lean,Counterexamples/LinearOrderWithPosMulPosEqZero.lean,Mathlib/Algebra/Algebra/RestrictScalars.lean,Mathlib/Algebra/Module/ZLattice/Basic.lean,Mathlib/Algebra/Module/ZLattice/Covolume.lean,Mathlib/Algebra/Order/Field/Canonical.lean,Mathlib/Algebra/Order/Field/Rat.lean,Mathlib/Algebra/Order/Floor/Ring.lean,Mathlib/Algebra/Order/GroupWithZero/Canonical.lean,Mathlib/Algebra/Order/GroupWithZero/Finset.lean,Mathlib/Algebra/Order/Hom/Monoid.lean,Mathlib/Algebra/Order/Nonneg/Field.lean,Mathlib/Algebra/Order/Nonneg/Ring.lean,Mathlib/Algebra/Order/Ring/Nat.lean,Mathlib/Analysis/Analytic/Basic.lean,Mathlib/Analysis/Analytic/CPolynomial.lean,Mathlib/Analysis/Analytic/CPolynomialDef.lean,Mathlib/Analysis/Analytic/ChangeOrigin.lean,Mathlib/Analysis/Analytic/Composition.lean,Mathlib/Analysis/Analytic/Constructions.lean,Mathlib/Analysis/Analytic/Inverse.lean,Mathlib/Analysis/Analytic/IsolatedZeros.lean,Mathlib/Analysis/Analytic/IteratedFDeriv.lean,Mathlib/Analysis/Analytic/Linear.lean,Mathlib/Analysis/Analytic/OfScalars.lean,Mathlib/Analysis/Analytic/Order.lean,Mathlib/Analysis/Analytic/Polynomial.lean,Mathlib/Analysis/Analytic/RadiusLiminf.lean,Mathlib/Analysis/Analytic/Uniqueness.lean,Mathlib/Analysis/Analytic/Within.lean,Mathlib/Analysis/Asymptotics/AsymptoticEquivalent.lean,Mathlib/Analysis/Asymptotics/Defs.lean,Mathlib/Analysis/Asymptotics/Lemmas.lean,Mathlib/Analysis/Asymptotics/SpecificAsymptotics.lean,Mathlib/Analysis/Asymptotics/SuperpolynomialDecay.lean,Mathlib/Analysis/Asymptotics/TVS.lean,Mathlib/Analysis/Asymptotics/Theta.lean,Mathlib/Analysis/BoundedVariation.lean,Mathlib/Analysis/BoxIntegral/Basic.lean,Mathlib/Analysis/BoxIntegral/DivergenceTheorem.lean,Mathlib/Analysis/BoxIntegral/Integrability.lean,Mathlib/Analysis/BoxIntegral/Partition/Additive.lean,Mathlib/Analysis/BoxIntegral/Partition/Measure.lean,Mathlib/Analysis/CStarAlgebra/ApproximateUnit.lean,Mathlib/Analysis/CStarAlgebra/Basic.lean,Mathlib/Analysis/CStarAlgebra/CStarMatrix.lean,Mathlib/Analysis/CStarAlgebra/Classes.lean,Mathlib/Analysis/CStarAlgebra/ContinuousFunctionalCalculus/Basic.lean,Mathlib/Analysis/CStarAlgebra/ContinuousFunctionalCalculus/Instances.lean,Mathlib/Analysis/CStarAlgebra/ContinuousFunctionalCalculus/Integral.lean,Mathlib/Analysis/CStarAlgebra/ContinuousFunctionalCalculus/Isometric.lean,Mathlib/Analysis/CStarAlgebra/ContinuousFunctionalCalculus/Order.lean,Mathlib/Analysis/CStarAlgebra/ContinuousLinearMap.lean,Mathlib/Analysis/CStarAlgebra/ContinuousMap.lean,Mathlib/Analysis/CStarAlgebra/Exponential.lean,Mathlib/Analysis/CStarAlgebra/GelfandDuality.lean,Mathlib/Analysis/CStarAlgebra/Hom.lean,Mathlib/Analysis/CStarAlgebra/Matrix.lean,Mathlib/Analysis/CStarAlgebra/Module/Constructions.lean,Mathlib/Analysis/CStarAlgebra/Module/Defs.lean,Mathlib/Analysis/CStarAlgebra/Multiplier.lean,Mathlib/Analysis/CStarAlgebra/PositiveLinearMap.lean,Mathlib/Analysis/CStarAlgebra/SpecialFunctions/PosPart.lean,Mathlib/Analysis/CStarAlgebra/Spectrum.lean,Mathlib/Analysis/CStarAlgebra/Unitization.lean,Mathlib/Analysis/CStarAlgebra/lpSpace.lean,Mathlib/Analysis/Calculus/AddTorsor/AffineMap.lean,Mathlib/Analysis/Calculus/AddTorsor/Coord.lean,Mathlib/Analysis/Calculus/BumpFunction/Basic.lean,Mathlib/Analysis/Calculus/BumpFunction/Convolution.lean,Mathlib/Analysis/Calculus/BumpFunction/FiniteDimension.lean,Mathlib/Analysis/Calculus/BumpFunction/InnerProduct.lean,Mathlib/Analysis/Calculus/BumpFunction/Normed.lean,Mathlib/Analysis/Calculus/Conformal/InnerProduct.lean,Mathlib/Analysis/Calculus/Conformal/NormedSpace.lean,Mathlib/Analysis/Calculus/ContDiff/Basic.lean,Mathlib/Analysis/Calculus/ContDiff/Bounds.lean,Mathlib/Analysis/Calculus/ContDiff/CPolynomial.lean,Mathlib/Analysis/Calculus/ContDiff/Defs.lean,Mathlib/Analysis/Calculus/ContDiff/FTaylorSeries.lean,Mathlib/Analysis/Calculus/ContDiff/FaaDiBruno.lean,Mathlib/Analysis/Calculus/ContDiff/FiniteDimension.lean,Mathlib/Analysis/Calculus/ContDiff/Operations.lean,Mathlib/Analysis/Calculus/ContDiff/RCLike.lean,Mathlib/Analysis/Calculus/ContDiff/WithLp.lean,Mathlib/Analysis/Calculus/DSlope.lean,Mathlib/Analysis/Calculus/Deriv/Abs.lean,Mathlib/Analysis/Calculus/Deriv/Add.lean,Mathlib/Analysis/Calculus/Deriv/AffineMap.lean,Mathlib/Analysis/Calculus/Deriv/Basic.lean,Mathlib/Analysis/Calculus/Deriv/Comp.lean,Mathlib/Analysis/Calculus/Deriv/Inv.lean,Mathlib/Analysis/Calculus/Deriv/Inverse.lean,Mathlib/Analysis/Calculus/Deriv/Linear.lean,Mathlib/Analysis/Calculus/Deriv/Mul.lean,Mathlib/Analysis/Calculus/Deriv/Pi.lean,Mathlib/Analysis/Calculus/Deriv/Polynomial.lean,Mathlib/Analysis/Calculus/Deriv/Pow.lean,Mathlib/Analysis/Calculus/Deriv/Prod.lean 670 5 ['astrainfinita', 'github-actions', 'leanprover-bot', 'leanprover-community-bot-assistant', 'mathlib4-dependent-issues-bot'] nobody
401-59035
1 year ago
unknown
0-0
0 seconds
13780 adomani
author:adomani
 deprecate injective --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict 31/9 .github/workflows/bors.yml,.github/workflows/build.yml,.github/workflows/build.yml.in,.github/workflows/build_fork.yml,Mathlib/Init/Function.lean,lake-manifest.json,lakefile.lean 7 2 ['github-actions', 'grunweg'] nobody
401-54819
1 year ago
unknown
0-0
0 seconds
19467 quangvdao
author:quangvdao
 feat(MvPolynomial/Equiv): Add `MvPolynomial.finSuccEquivNth` This PR adds `MvPolynomial.finSuccEquivNth`, which is the algebra isomorphism between `MvPolynomial (Fin (n + 1)) R` and `Polynomial (MvPolynomial (Fin n) R)` by identifying the `p`-th variable as the indeterminate. This generalizes `MvPolynomial.finSuccEquiv` which is only for the `0`-th variable. The supporting theorems for the `Nth` version are identical to the current version, with the `Nth` version deduced from the former. These changes require new definitions in `Finsupp/Fin`, which is a separate PR. Co-authored-by: Yaël Dillies --- - [ ] depends on: #19315 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-algebra blocked-by-other-PR
label:t-algebra$
 541/163 Mathlib/Algebra/BigOperators/Fin.lean,Mathlib/Algebra/BigOperators/Finsupp.lean,Mathlib/Algebra/MvPolynomial/Equiv.lean,Mathlib/Data/Fin/Basic.lean,Mathlib/Data/Fin/Tuple/Basic.lean,Mathlib/Data/Finsupp/Fin.lean,scripts/nolints_prime_decls.txt 7 9 ['acmepjz', 'github-actions', 'grunweg', 'mathlib4-dependent-issues-bot', 'quangvdao'] nobody
400-5245
1 year ago
543-25211
543 days ago
0-790
13 minutes
20313 thefundamentaltheor3m
author:thefundamentaltheor3m
 feat(Data/Complex/Exponential): prove some useful results about the complex exponential. This PR proves two basic results about the complex exponential: * `abs_exp_mul_I (x : ℂ) : abs (Complex.exp (I * x)) = Real.exp (-x.im)` * `one_sub_rexp_re_le_abs_one_sub_cexp (x : ℂ) : 1 - Real.exp x.re ≤ Complex.abs (1 - Complex.exp x)` Both results were proved as part of the sphere packing project. There's a chance they're too specific for mathlib, but I thought they were worth PRing anyway. Would it also be a good idea to tag `abs_exp_mul_I` with `simp`? Feedback/suggestions welcome. Note: `one_sub_rexp_re_le_abs_one_sub_cexp` was proved by Bhavik Mehta @b-mehta --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-analysis new-contributor 167/141 Mathlib.lean,Mathlib/Analysis/Complex/Basic.lean,Mathlib/Analysis/SpecialFunctions/Log/ERealExp.lean,Mathlib/Analysis/SpecialFunctions/Trigonometric/Chebyshev.lean,Mathlib/Data/Complex/Exponential/Defs.lean,Mathlib/Data/Complex/Exponential/Lemmas.lean,Mathlib/Data/Complex/ExponentialBounds.lean,Mathlib/Tactic/FunProp.lean,MathlibTest/Recall.lean,MathlibTest/positivity.lean 10 12 ['b-mehta', 'github-actions', 'kim-em', 'thefundamentaltheor3m', 'trivial1711'] nobody
400-5198
1 year ago
483-16445
483 days ago
8-42257
8 days
22698 Kiolt
author:Kiolt
 feat: notation for whisker(Left/Right)Iso From Toric --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-category-theory toric 175/113 Mathlib/Algebra/Homology/Monoidal.lean,Mathlib/CategoryTheory/Bicategory/Adjunction/Basic.lean,Mathlib/CategoryTheory/Bicategory/Basic.lean,Mathlib/CategoryTheory/Bicategory/Coherence.lean,Mathlib/CategoryTheory/Bicategory/Extension.lean,Mathlib/CategoryTheory/Bicategory/Functor/Pseudofunctor.lean,Mathlib/CategoryTheory/Bicategory/NaturalTransformation/Strong.lean,Mathlib/CategoryTheory/Bicategory/SingleObj.lean,Mathlib/CategoryTheory/Closed/Functor.lean,Mathlib/CategoryTheory/Closed/Ideal.lean,Mathlib/CategoryTheory/Enriched/FunctorCategory.lean,Mathlib/CategoryTheory/GradedObject/Monoidal.lean,Mathlib/CategoryTheory/Monoidal/Braided/Basic.lean,Mathlib/CategoryTheory/Monoidal/Braided/Reflection.lean,Mathlib/CategoryTheory/Monoidal/Category.lean,Mathlib/CategoryTheory/Monoidal/Center.lean,Mathlib/CategoryTheory/Monoidal/Free/Coherence.lean,Mathlib/CategoryTheory/Monoidal/Preadditive.lean,Mathlib/CategoryTheory/Monoidal/Transport.lean,Mathlib/Tactic/CategoryTheory/BicategoricalComp.lean,Mathlib/Tactic/CategoryTheory/Bicategory/Datatypes.lean,Mathlib/Tactic/CategoryTheory/Bicategory/Normalize.lean,Mathlib/Tactic/CategoryTheory/Bicategory/PureCoherence.lean,Mathlib/Tactic/CategoryTheory/Monoidal/Datatypes.lean,Mathlib/Tactic/CategoryTheory/Monoidal/Normalize.lean,Mathlib/Tactic/CategoryTheory/Monoidal/PureCoherence.lean,Mathlib/Tactic/CategoryTheory/MonoidalComp.lean 27 21 ['Kiolt', 'YaelDillies', 'b-mehta', 'github-actions', 'leanprover-bot'] nobody
400-5027
1 year ago
436-24384
436 days ago
3-29299
3 days
20730 kuotsanhsu
author:kuotsanhsu
 feat(LinearAlgebra/Matrix/SchurTriangulation): prove Schur decomposition/triangulation `Matrix.schur_triangulation` shows that a matrix over an algebraically closed field is unitarily similar to an upper triangular matrix --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict awaiting-author t-algebra new-contributor
label:t-algebra$
 317/2 Mathlib.lean,Mathlib/LinearAlgebra/Matrix/Block.lean,Mathlib/LinearAlgebra/Matrix/SchurTriangulation.lean,Mathlib/Logic/Equiv/Basic.lean 4 14 ['eric-wieser', 'github-actions', 'kim-em', 'kuotsanhsu'] nobody
400-1330
1 year ago
479-78703
479 days ago
13-56244
13 days
19117 eric-wieser
author:eric-wieser
 feat: derivatives of matrix operations These are finally possible to state after #19108. However, a lot of bundled `ContinuousLinearMap`s are missing. --- - [x] depends on: #19108 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict WIP t-analysis 336/22 Mathlib.lean,Mathlib/Analysis/Calculus/Deriv/Matrix.lean,Mathlib/Analysis/Calculus/FDeriv/Basic.lean,Mathlib/Analysis/Calculus/FDeriv/Matrix.lean 4 3 ['github-actions', 'leanprover-community-bot-assistant', 'mathlib4-dependent-issues-bot'] nobody
398-23708
1 year ago
unknown
0-0
0 seconds
12605 FR-vdash-bot
author:FR-vdash-bot
 chore: attribute [induction_eliminator] Add attribute [induction_eliminator] to `AdjoinRoot.induction_on` `ENat.recTopCoe` `ENNReal.recTopCoe` `Finset.induction` `Magma.AssocQuotient.induction_on` `ManyOneDegree.ind_on` `Module.Ray.ind` (and add `Orientation.ind` for `Orientation`, an abbrev of it. I wish that we do not need to add it in the future.) `Multiset.induction` `MvPolynomial.induction_on` `OnePoint.rec` `Opposite.rec'` `Ordinal.limitRecOn` `PartENat.casesOn` `Polynomial.induction_on'` `QuotientAddGroup.induction_on'` (and add `AddCircle.induction_on` for `AddCircle`, an abbrev of it. I wish that we do not need to add it in the future.) `QuotientGroup.induction_on'` (doesn't actually work) `Real.Angle.induction_on` `SimplexCategory.rec` `Trunc.induction_on` --- - [x] depends on: #13476 - [x] depends on: #13264 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict awaiting-author 354/342 Mathlib/Algebra/BigOperators/Associated.lean,Mathlib/Algebra/BigOperators/Group/Finset.lean,Mathlib/Algebra/BigOperators/Group/Multiset.lean,Mathlib/Algebra/BigOperators/Ring.lean,Mathlib/Algebra/GCDMonoid/Finset.lean,Mathlib/Algebra/GCDMonoid/Multiset.lean,Mathlib/Algebra/Group/Subgroup/Finite.lean,Mathlib/Algebra/GroupWithZero/WithZero.lean,Mathlib/Algebra/Lie/Submodule.lean,Mathlib/Algebra/Lie/Weights/Basic.lean,Mathlib/Algebra/Module/BigOperators.lean,Mathlib/Algebra/MvPolynomial/Basic.lean,Mathlib/Algebra/MvPolynomial/Derivation.lean,Mathlib/Algebra/MvPolynomial/Variables.lean,Mathlib/Algebra/Order/ToIntervalMod.lean,Mathlib/Algebra/Polynomial/BigOperators.lean,Mathlib/Algebra/Polynomial/Degree/Lemmas.lean,Mathlib/Algebra/Polynomial/Derivative.lean,Mathlib/Algebra/Polynomial/Eval.lean,Mathlib/Algebra/Polynomial/Induction.lean,Mathlib/Algebra/Polynomial/Module/Basic.lean,Mathlib/Algebra/Polynomial/PartialFractions.lean,Mathlib/Algebra/Polynomial/Smeval.lean,Mathlib/Algebra/Tropical/BigOperators.lean,Mathlib/AlgebraicTopology/DoldKan/NCompGamma.lean,Mathlib/AlgebraicTopology/SimplexCategory.lean,Mathlib/AlgebraicTopology/SplitSimplicialObject.lean,Mathlib/Analysis/Analytic/Constructions.lean,Mathlib/Analysis/Asymptotics/Asymptotics.lean,Mathlib/Analysis/BoxIntegral/Basic.lean,Mathlib/Analysis/BoxIntegral/Partition/Additive.lean,Mathlib/Analysis/BoxIntegral/Partition/Split.lean,Mathlib/Analysis/Calculus/ContDiff/Basic.lean,Mathlib/Analysis/Calculus/ContDiff/Bounds.lean,Mathlib/Analysis/Calculus/Deriv/Polynomial.lean,Mathlib/Analysis/Convex/Combination.lean,Mathlib/Analysis/Convex/Exposed.lean,Mathlib/Analysis/Fourier/AddCircle.lean,Mathlib/Analysis/NormedSpace/Exponential.lean,Mathlib/Analysis/NormedSpace/Multilinear/Basic.lean,Mathlib/Analysis/SpecialFunctions/Complex/Arg.lean,Mathlib/Analysis/SpecialFunctions/Complex/Circle.lean,Mathlib/Analysis/SpecialFunctions/Log/Base.lean,Mathlib/Analysis/SpecialFunctions/PolynomialExp.lean,Mathlib/Analysis/SpecialFunctions/Pow/NNReal.lean,Mathlib/Analysis/SpecialFunctions/Trigonometric/Angle.lean,Mathlib/CategoryTheory/Filtered/Basic.lean,Mathlib/CategoryTheory/Subobject/Lattice.lean,Mathlib/Combinatorics/Additive/PluenneckeRuzsa.lean,Mathlib/Combinatorics/SetFamily/Compression/Down.lean,Mathlib/Combinatorics/SetFamily/FourFunctions.lean,Mathlib/Combinatorics/SetFamily/HarrisKleitman.lean,Mathlib/Computability/Reduce.lean,Mathlib/Data/DFinsupp/Basic.lean,Mathlib/Data/DFinsupp/WellFounded.lean,Mathlib/Data/Finset/Basic.lean,Mathlib/Data/Finset/Fold.lean,Mathlib/Data/Finset/Lattice.lean,Mathlib/Data/Finset/NAry.lean,Mathlib/Data/Fintype/Sum.lean,Mathlib/Data/Multiset/Antidiagonal.lean,Mathlib/Data/Multiset/Basic.lean,Mathlib/Data/Multiset/Bind.lean,Mathlib/Data/Multiset/Fold.lean,Mathlib/Data/Multiset/Lattice.lean,Mathlib/Data/Multiset/Pi.lean,Mathlib/Data/Multiset/Powerset.lean,Mathlib/Data/Multiset/Sections.lean,Mathlib/Data/Nat/Choose/Multinomial.lean,Mathlib/Data/Nat/PartENat.lean,Mathlib/Data/Quot.lean,Mathlib/Data/Set/Pointwise/BigOperators.lean,Mathlib/FieldTheory/IntermediateField.lean,Mathlib/FieldTheory/IsAlgClosed/AlgebraicClosure.lean,Mathlib/Geometry/Manifold/Algebra/Monoid.lean,Mathlib/Geometry/RingedSpace/Basic.lean,Mathlib/Geometry/RingedSpace/OpenImmersion.lean,Mathlib/Geometry/RingedSpace/PresheafedSpace/Gluing.lean,Mathlib/GroupTheory/Coset.lean,Mathlib/GroupTheory/NoncommPiCoprod.lean,Mathlib/GroupTheory/Perm/Cycle/Type.lean,Mathlib/LinearAlgebra/Determinant.lean,Mathlib/LinearAlgebra/Eigenspace/Basic.lean,Mathlib/LinearAlgebra/FiniteDimensional.lean,Mathlib/LinearAlgebra/LinearIndependent.lean,Mathlib/LinearAlgebra/Matrix/Determinant/Basic.lean,Mathlib/LinearAlgebra/Multilinear/Basic.lean,Mathlib/LinearAlgebra/Orientation.lean,Mathlib/LinearAlgebra/Projectivization/Basic.lean,Mathlib/LinearAlgebra/Ray.lean,Mathlib/LinearAlgebra/TensorProduct/Basic.lean,Mathlib/Logic/Hydra.lean,Mathlib/MeasureTheory/Function/ConditionalExpectation/Basic.lean,Mathlib/MeasureTheory/Function/L1Space.lean,Mathlib/MeasureTheory/Function/SimpleFunc.lean,Mathlib/MeasureTheory/Integral/Lebesgue.lean,Mathlib/MeasureTheory/Integral/Marginal.lean,Mathlib/MeasureTheory/Integral/MeanInequalities.lean,Mathlib/MeasureTheory/Integral/SetIntegral.lean,Mathlib/MeasureTheory/Measure/AddContent.lean 140 14 ['YaelDillies', 'astrainfinita', 'eric-wieser', 'github-actions', 'leanprover-community-mathlib4-bot', 'urkud'] nobody
398-18323
1 year ago
730-49894
730 days ago
4-46495
4 days
23859 urkud
author:urkud
 feat(Topology/../Order/Field): generalize to `Semifield` .. from a linear ordered field to a linear ordered semifield--- - [ ] depends on: #23857 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-topology 245/219 Mathlib/Algebra/Order/Group/Pointwise/Interval.lean,Mathlib/Analysis/BoxIntegral/Box/SubboxInduction.lean,Mathlib/Topology/Algebra/Order/Field.lean,Mathlib/Topology/Order/Basic.lean 4 3 ['github-actions', 'leanprover-community-bot-assistant', 'mathlib4-dependent-issues-bot'] nobody
395-44146
1 year ago
408-54787
408 days ago
0-265
4 minutes
24219 Paul-Lez
author:Paul-Lez
 feat: linear independence of the tensor product of two linearly independent families This is still WIP (the proofs are a little too long, and some lemmas need to be moved to other files!) From Toric --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) WIP t-algebra toric
label:t-algebra$
 193/0 Mathlib/LinearAlgebra/LinearIndependent/Tprod.lean 1 1 ['github-actions'] nobody
395-23578
1 year ago
397-38479
397 days ago
0-2221
37 minutes
23810 b-reinke
author:b-reinke
 chore(Order/Interval): generalize succ/pred lemmas to partial orders Many lemmas in `Mathlib/Order/Interval/Set/SuccPred.lean`and `Mathlib/Order/Interval/Finset/SuccPred.lean` also work for partial orders. They are generalized in this PR by introducing different sections for `PartialOrder` and `LinearOrder` assumptions in the respective files. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-order 231/89 Mathlib/Order/Interval/Finset/SuccPred.lean,Mathlib/Order/Interval/Set/SuccPred.lean 2 2 ['github-actions', 'leanprover-community-bot-assistant'] nobody
393-20921
1 year ago
393-20923
393 days ago
16-29623
16 days
24285 madvorak
author:madvorak
 chore(Algebra/*-{Category,Homology}): remove unnecessary universe variables Discussions: https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/Call.20for.20help.3A.20technical.2F.20organisational.20debt/with/513620128 https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/Algebra.20and.20.60Type*.60/with/513558902 https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/Task.2026.3A.20Replace.20Type.20u.20by.20Type*.20wherever.20possible/with/513592993 --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-algebra
label:t-algebra$
 542/916 Mathlib/Algebra/AddTorsor/Basic.lean,Mathlib/Algebra/Algebra/Defs.lean,Mathlib/Algebra/Algebra/Equiv.lean,Mathlib/Algebra/Algebra/Field.lean,Mathlib/Algebra/Algebra/Hom.lean,Mathlib/Algebra/Algebra/Operations.lean,Mathlib/Algebra/Algebra/Spectrum/Basic.lean,Mathlib/Algebra/Algebra/Subalgebra/Lattice.lean,Mathlib/Algebra/Algebra/Subalgebra/Tower.lean,Mathlib/Algebra/Algebra/Tower.lean,Mathlib/Algebra/Central/Basic.lean,Mathlib/Algebra/Central/Defs.lean,Mathlib/Algebra/Central/TensorProduct.lean,Mathlib/Algebra/CharP/Pi.lean,Mathlib/Algebra/CharP/Quotient.lean,Mathlib/Algebra/CharP/Subring.lean,Mathlib/Algebra/DirectSum/Algebra.lean,Mathlib/Algebra/DirectSum/Basic.lean,Mathlib/Algebra/DirectSum/Finsupp.lean,Mathlib/Algebra/DirectSum/Module.lean,Mathlib/Algebra/EuclideanDomain/Basic.lean,Mathlib/Algebra/EuclideanDomain/Defs.lean,Mathlib/Algebra/Field/Basic.lean,Mathlib/Algebra/Field/Defs.lean,Mathlib/Algebra/Field/IsField.lean,Mathlib/Algebra/Field/MinimalAxioms.lean,Mathlib/Algebra/Field/Subfield/Basic.lean,Mathlib/Algebra/Field/Subfield/Defs.lean,Mathlib/Algebra/FreeNonUnitalNonAssocAlgebra.lean,Mathlib/Algebra/Group/Conj.lean,Mathlib/Algebra/Group/Defs.lean,Mathlib/Algebra/Group/Equiv/Finite.lean,Mathlib/Algebra/Group/Ext.lean,Mathlib/Algebra/Group/Hom/End.lean,Mathlib/Algebra/Group/Hom/Instances.lean,Mathlib/Algebra/Group/Invertible/Basic.lean,Mathlib/Algebra/Group/Invertible/Defs.lean,Mathlib/Algebra/Group/Pi/Basic.lean,Mathlib/Algebra/Group/Pi/Lemmas.lean,Mathlib/Algebra/Group/TypeTags/Basic.lean,Mathlib/Algebra/Group/TypeTags/Finite.lean,Mathlib/Algebra/Group/TypeTags/Hom.lean,Mathlib/Algebra/Group/Units/Basic.lean,Mathlib/Algebra/Group/Units/Defs.lean,Mathlib/Algebra/Group/Units/Hom.lean,Mathlib/Algebra/Group/WithOne/Basic.lean,Mathlib/Algebra/Group/WithOne/Defs.lean,Mathlib/Algebra/GroupWithZero/Action/Pi.lean,Mathlib/Algebra/GroupWithZero/Defs.lean,Mathlib/Algebra/GroupWithZero/Invertible.lean,Mathlib/Algebra/GroupWithZero/NeZero.lean,Mathlib/Algebra/Lie/Abelian.lean,Mathlib/Algebra/Lie/Basic.lean,Mathlib/Algebra/Lie/CartanMatrix.lean,Mathlib/Algebra/Lie/CartanSubalgebra.lean,Mathlib/Algebra/Lie/Character.lean,Mathlib/Algebra/Lie/Classical.lean,Mathlib/Algebra/Lie/DirectSum.lean,Mathlib/Algebra/Lie/Free.lean,Mathlib/Algebra/Lie/Ideal.lean,Mathlib/Algebra/Lie/IdealOperations.lean,Mathlib/Algebra/Lie/Matrix.lean,Mathlib/Algebra/Lie/Nilpotent.lean,Mathlib/Algebra/Lie/NonUnitalNonAssocAlgebra.lean,Mathlib/Algebra/Lie/OfAssociative.lean,Mathlib/Algebra/Lie/Quotient.lean,Mathlib/Algebra/Lie/SkewAdjoint.lean,Mathlib/Algebra/Lie/Solvable.lean,Mathlib/Algebra/Lie/Subalgebra.lean,Mathlib/Algebra/Lie/Submodule.lean,Mathlib/Algebra/Lie/TensorProduct.lean,Mathlib/Algebra/Lie/UniversalEnveloping.lean,Mathlib/Algebra/Module/Basic.lean,Mathlib/Algebra/Module/CharacterModule.lean,Mathlib/Algebra/Module/DedekindDomain.lean,Mathlib/Algebra/Module/Defs.lean,Mathlib/Algebra/Module/End.lean,Mathlib/Algebra/Module/Equiv/Opposite.lean,Mathlib/Algebra/Module/Lattice.lean,Mathlib/Algebra/Module/LinearMap/Basic.lean,Mathlib/Algebra/Module/LinearMap/Defs.lean,Mathlib/Algebra/Module/LinearMap/End.lean,Mathlib/Algebra/Module/LocalizedModule/Basic.lean,Mathlib/Algebra/Module/MinimalAxioms.lean,Mathlib/Algebra/Module/NatInt.lean,Mathlib/Algebra/Module/Opposite.lean,Mathlib/Algebra/Module/Pi.lean,Mathlib/Algebra/Module/Presentation/Differentials.lean,Mathlib/Algebra/Module/Presentation/Tensor.lean,Mathlib/Algebra/Module/Rat.lean,Mathlib/Algebra/Module/RingHom.lean,Mathlib/Algebra/Module/Submodule/Basic.lean,Mathlib/Algebra/Module/Torsion.lean,Mathlib/Algebra/MonoidAlgebra/Basic.lean,Mathlib/Algebra/MonoidAlgebra/Defs.lean,Mathlib/Algebra/MonoidAlgebra/Support.lean,Mathlib/Algebra/MvPolynomial/Basic.lean,Mathlib/Algebra/MvPolynomial/CommRing.lean,Mathlib/Algebra/MvPolynomial/Degrees.lean,Mathlib/Algebra/MvPolynomial/Equiv.lean 182 22 ['erdOne', 'github-actions', 'leanprover-bot', 'leanprover-community-bot-assistant', 'madvorak', 'mattrobball'] nobody
393-9618
1 year ago
393-9619
393 days ago
2-11655
2 days
14931 eric-wieser
author:eric-wieser
 feat: volume of a simplex --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-euclidean-geometry 207/0 Mathlib/Geometry/Euclidean/Basic.lean,Mathlib/Geometry/Euclidean/Circumcenter.lean,Mathlib/Geometry/Euclidean/Volume.lean 3 3 ['eric-wieser', 'github-actions', 'leanprover-community-bot-assistant'] nobody
391-22075
1 year ago
unknown
0-0
0 seconds
22583 imathwy
author:imathwy
 feat: affinespace homeomorphism There exists a homeomorphism (a continuous bijection with a continuous inverse) between an affine subspace s of a vector space V over a field 𝕜 and its direction s.direction , given a chosen point z ∈ s . --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict awaiting-author t-algebra
label:t-algebra$
 64/2 Mathlib/Analysis/Normed/Group/AddTorsor.lean,Mathlib/LinearAlgebra/AffineSpace/ContinuousAffineEquiv.lean,Mathlib/Topology/Algebra/ConstMulAction.lean,Mathlib/Topology/Algebra/MulAction.lean 4 6 ['JovanGerb', 'eric-wieser', 'github-actions', 'grunweg'] nobody
391-19793
1 year ago
443-31814
443 days ago
0-18122
5 hours
24243 Timeroot
author:Timeroot
 feat(Analysis/Calculus/FDeriv): Fderiv on torsors Experiment to see how this goes for now, see [Zulip discussion](https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/Upgrade.20.60fderiv.60.20to.20.60AddTorsor.60) --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-analysis 539/447 Mathlib/Algebra/AddTorsor/Defs.lean,Mathlib/Analysis/Calculus/Deriv/Basic.lean,Mathlib/Analysis/Calculus/Deriv/Prod.lean,Mathlib/Analysis/Calculus/Deriv/Slope.lean,Mathlib/Analysis/Calculus/FDeriv/Add.lean,Mathlib/Analysis/Calculus/FDeriv/Basic.lean,Mathlib/Analysis/Calculus/FDeriv/Bilinear.lean,Mathlib/Analysis/Calculus/FDeriv/Equiv.lean,Mathlib/Analysis/Calculus/FDeriv/Linear.lean,Mathlib/Analysis/Calculus/FDeriv/Measurable.lean,Mathlib/Analysis/Calculus/FDeriv/Mul.lean,Mathlib/Analysis/Calculus/FDeriv/Symmetric.lean,Mathlib/Analysis/Calculus/Gradient/Basic.lean,Mathlib/Analysis/Calculus/LineDeriv/Basic.lean,Mathlib/Analysis/Calculus/LocalExtr/Basic.lean,Mathlib/Analysis/Calculus/ParametricIntegral.lean,Mathlib/Analysis/Calculus/Rademacher.lean,Mathlib/Analysis/Calculus/TangentCone.lean,Mathlib/Analysis/Calculus/UniformLimitsDeriv.lean,Mathlib/Analysis/Complex/Periodic.lean,Mathlib/Analysis/Complex/RealDeriv.lean,Mathlib/Analysis/MellinTransform.lean,Mathlib/Analysis/Normed/Group/Uniform.lean,Mathlib/Analysis/Normed/Module/Basic.lean,Mathlib/Analysis/SpecialFunctions/ExpDeriv.lean,Mathlib/Analysis/SpecialFunctions/Exponential.lean,Mathlib/Analysis/SpecialFunctions/Gamma/Deriv.lean,Mathlib/Analysis/SpecialFunctions/Pow/Deriv.lean,Mathlib/Analysis/SpecialFunctions/Trigonometric/EulerSineProd.lean,Mathlib/Geometry/Manifold/IntegralCurve/Transform.lean,Mathlib/Geometry/Manifold/IsManifold/Basic.lean,Mathlib/Geometry/Manifold/MFDeriv/Basic.lean,Mathlib/Geometry/Manifold/MFDeriv/SpecificFunctions.lean,Mathlib/NumberTheory/EulerProduct/ExpLog.lean,Mathlib/NumberTheory/Harmonic/GammaDeriv.lean,Mathlib/NumberTheory/LSeries/Nonvanishing.lean,MathlibTest/Recall.lean 37 3 ['github-actions', 'leanprover-community-bot-assistant'] nobody
390-2931
1 year ago
unknown
0-0
0 seconds
23593 erdOne
author:erdOne
 feat(AlgebraicGeometry): the tilde construction is functorial --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict awaiting-author t-algebraic-geometry 95/38 Mathlib/AlgebraicGeometry/Modules/Sheaf.lean,Mathlib/AlgebraicGeometry/Modules/Tilde.lean 2 4 ['chrisflav', 'github-actions', 'leanprover-community-bot-assistant'] nobody
389-36989
1 year ago
414-40003
414 days ago
0-71091
19 hours
21065 eric-wieser
author:eric-wieser
 feat: generalize `tangentConeAt.lim_zero` to TVS ... and then adjust the `variable`s down the rest of the file to make use of the generality. There are two key lemmas that this does not generalize, which would probably unlock the rest of the file: * `subset_tangentCone_prod_left` (and `_right`) * `zero_mem_tangentCone` --- - [ ] depends on: #20859 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict WIP t-analysis 55/28 Mathlib/Analysis/Calculus/TangentCone.lean 1 16 ['ADedecker', 'eric-wieser', 'github-actions', 'j-loreaux', 'leanprover-community-bot-assistant', 'mathlib4-dependent-issues-bot', 'urkud'] nobody
389-29393
1 year ago
456-65468
456 days ago
23-20072
23 days
22721 grunweg
author:grunweg
 chore(MeasureTheory/Function/LpSeminorm/Basic): generalise more results to enorm classes Done for the Carleson project. --- - depends on #22708 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict WIP carleson t-measure-probability 134/10 Mathlib/MeasureTheory/Function/LpSeminorm/Basic.lean 1 2 ['github-actions', 'leanprover-community-bot-assistant'] nobody
388-22061
1 year ago
440-8427
440 days ago
0-6
6 seconds
14731 adomani
author:adomani
 feat: the repeated typeclass assumption linter [#mathlib4 > recyclable variables @ 💬](https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/recyclable.20variables/near/451167963) also [#mathlib4 > Normed modules @ 💬](https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/Normed.20modules/near/512242167) --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict WIP t-linter large-import 178/0 Mathlib.lean,Mathlib/Tactic.lean,Mathlib/Tactic/Linter.lean,Mathlib/Tactic/Linter/DependentTypeclass.lean,MathlibTest/DependentTypeclass.lean 5 3 ['github-actions', 'leanprover-community-bot-assistant', 'mattrobball'] nobody
387-27300
1 year ago
677-26045
677 days ago
0-109
1 minute
24549 grunweg
author:grunweg
 feat: define embedded submanifolds, attempt 1 Not meant to be merged (I think a different design is better); opening this so I can find this more easily. --- - [ ] depends on: #23040 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict WIP t-differential-geometry blocked-by-other-PR 1445/2 Mathlib.lean,Mathlib/Analysis/NormedSpace/HahnBanach/Splits.lean,Mathlib/Geometry/Manifold/Diffeomorph.lean,Mathlib/Geometry/Manifold/EmbeddedSubmanifold.lean,Mathlib/Geometry/Manifold/IsImmersionEmbedding.lean,Mathlib/Geometry/Manifold/LocalDiffeomorph.lean,Mathlib/Geometry/Manifold/MSplits.lean,Mathlib/LinearAlgebra/Prod.lean 8 2 ['leanprover-community-bot-assistant', 'mathlib4-dependent-issues-bot'] nobody
384-52513
1 year ago
385-35436
385 days ago
0-1
1 second
23921 alreadydone
author:alreadydone
 Jyxu/projective trace --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict WIP t-algebra
label:t-algebra$
 157/123 Mathlib/FieldTheory/CardinalEmb.lean,Mathlib/FieldTheory/Relrank.lean,Mathlib/LinearAlgebra/Contraction.lean,Mathlib/LinearAlgebra/Dual.lean,Mathlib/RingTheory/LocalProperties/Projective.lean 5 1 ['leanprover-community-bot-assistant'] nobody
384-52345
1 year ago
unknown
0-0
0 seconds
22809 b-reinke
author:b-reinke
 feat: Category algebras and path algebras This PR defines the category algebra of a linear category and path algebras of quivers. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) WIP t-algebra t-category-theory new-contributor
label:t-algebra$
 218/0 Mathlib/Algebra/Ring/Assoc.lean,Mathlib/CategoryTheory/Linear/CategoryAlgebra.lean,Mathlib/Combinatorics/Quiver/PathAlgebra.lean,Mathlib/Data/DFinsupp/BigOperators.lean 4 2 ['b-reinke', 'github-actions'] nobody
384-52169
1 year ago
unknown
0-0
0 seconds
21252 ADedecker
author:ADedecker
 feat: redefine uniformly convex normed spaces with filters instead of epsilons And conceptualize some proofs. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-topology t-algebra
label:t-algebra$
 301/87 Mathlib/Analysis/Convex/Uniform.lean,Mathlib/Analysis/InnerProductSpace/Basic.lean,Mathlib/Order/Basic.lean,Mathlib/Order/Filter/Pointwise.lean,Mathlib/Topology/Algebra/UniformGroup/Defs.lean,Mathlib/Topology/Algebra/UniformMulAction.lean 6 1 ['github-actions'] nobody
384-52084
1 year ago
unknown
0-0
0 seconds
19821 eric-wieser
author:eric-wieser
 feat: add a Qq version of AtomM that groups by type --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict WIP large-import t-meta 332/30 Mathlib/Data/Ineq.lean,Mathlib/Tactic/Linarith/Datatypes.lean,Mathlib/Tactic/Linarith/Oracle/SimplexAlgorithm.lean,Mathlib/Tactic/Linarith/Preprocessing.lean,Mathlib/Util/AtomM.lean,Mathlib/Util/Qq.lean 6 1 ['github-actions'] nobody
384-51897
1 year ago
unknown
0-0
0 seconds
19120 hrmacbeth
author:hrmacbeth
 feat: stop `ring`/`abel` from seeing algebraic operations inside `let`s This draft PR illustrates a feature I would like to see in core: a variant of `whnf` which allows particular kinds of reduction, such as zeta-delta reduction, to be turned off. Here it is used to make ring-normalization and abelian-group-normalization a bit more responsive to what (I think) users expect: these normalizations would no longer look inside user-defined lets to see algebraic operations in those expressions. Note: In Lean/Mathlib 3, `ring` matched for algebraic operations on an algebraic expression `e` itself, not on `← whnfR e`. So mathlib3 `ring` didn't see algebraic operations inside `let`s -- but it also didn't see algebraic operations requiring beta-reduction (like `(fun t ↦ t + 1) x`) or see inside abbreviations. [Zulip](https://leanprover.zulipchat.com/#narrow/channel/239415-metaprogramming-.2F-tactics/topic/whnf.20variant.20which.20preserves.20let-bindings) Update: fortuitously, it looks like the new core PR https://github.com/leanprover/lean4/pull/6053 will provide this feature! --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict blocked-by-core-PR t-meta 137/15 Archive/Imo/Imo2006Q3.lean,Archive/Imo/Imo2008Q2.lean,Mathlib.lean,Mathlib/Algebra/ContinuedFractions/Computation/Approximations.lean,Mathlib/Analysis/Analytic/Composition.lean,Mathlib/Analysis/Calculus/FDeriv/Measurable.lean,Mathlib/Analysis/SpecialFunctions/Gamma/BohrMollerup.lean,Mathlib/Analysis/SpecialFunctions/Integrals.lean,Mathlib/Analysis/SpecialFunctions/Stirling.lean,Mathlib/Data/Real/Pi/Irrational.lean,Mathlib/NumberTheory/LSeries/HurwitzZetaOdd.lean,Mathlib/NumberTheory/SumPrimeReciprocals.lean,Mathlib/RingTheory/WittVector/DiscreteValuationRing.lean,Mathlib/Tactic/Abel.lean,Mathlib/Tactic/Polyrith.lean,Mathlib/Tactic/Ring/Basic.lean,Mathlib/Tactic/Ring/RingNF.lean,Mathlib/Topology/MetricSpace/GromovHausdorff.lean,Mathlib/Util/WHNF.lean,MathlibTest/abel.lean,MathlibTest/ring.lean 21 5 ['JovanGerb', 'github-actions', 'grunweg', 'hrmacbeth'] nobody
384-51877
1 year ago
unknown
0-0
0 seconds
17069 yuma-mizuno
author:yuma-mizuno
 chore(CategoryTheory/Functor/Basic): put `simp` at `Functor.id_comp` --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-category-theory 41/30 Mathlib/CategoryTheory/Adjunction/Mates.lean,Mathlib/CategoryTheory/Functor/Basic.lean,Mathlib/CategoryTheory/GuitartExact/VerticalComposition.lean,Mathlib/CategoryTheory/Limits/HasLimits.lean,Mathlib/CategoryTheory/Shift/CommShift.lean 5 3 ['github-actions', 'leanprover-bot', 'yuma-mizuno'] nobody
384-51867
1 year ago
unknown
0-0
0 seconds
14803 StevenClontz
author:StevenClontz
 chore: use `Disjoint` nhd filters for all separation axioms --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-topology 157/122 Mathlib/Topology/Separation.lean 1 1 ['github-actions'] nobody
384-51851
1 year ago
unknown
0-0
0 seconds
14675 adomani
author:adomani
 dev: the repeated variable linter --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict WIP t-linter 71/0 Mathlib/Tactic/Linter/Lint.lean 1 1 ['github-actions'] nobody
384-51846
1 year ago
679-38400
679 days ago
0-8
8 seconds
14330 Ruben-VandeVelde
author:Ruben-VandeVelde
 chore: split Mathlib.Algebra.Star.Basic --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict awaiting-author 446/331 Mathlib.lean,Mathlib/Algebra/Module/LinearMap/Star.lean,Mathlib/Algebra/Star/Basic.lean,Mathlib/Algebra/Star/BigOperators.lean,Mathlib/Algebra/Star/Defs.lean,Mathlib/Algebra/Star/Lemmas.lean,Mathlib/Algebra/Star/Order.lean,Mathlib/Algebra/Star/Pi.lean,Mathlib/Algebra/Star/Pointwise.lean,Mathlib/Algebra/Star/Rat.lean,Mathlib/Algebra/Star/Regular.lean,Mathlib/Algebra/Star/StarRingHom.lean,Mathlib/Analysis/NormedSpace/LinearIsometry.lean,Mathlib/Data/Complex/Basic.lean,scripts/noshake.json 15 3 ['github-actions', 'grunweg', 'j-loreaux'] nobody
384-51806
1 year ago
689-68151
689 days ago
0-45204
12 hours
14007 adomani
author:adomani
 test: papercut linter working on all mathlib This PR is a testing ground for potential issues with the papercut linter #13999. It is not intended to be merged. The linter is active on all of mathlib, to make sure that the linter does not throw errors, but only emits warnings! --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict WIP t-linter 249/0 Mathlib.lean,Mathlib/Tactic.lean,Mathlib/Tactic/Linter.lean,Mathlib/Tactic/Linter/Papercut.lean,test/Papercut.lean 5 1 ['github-actions'] nobody
384-51691
1 year ago
unknown
0-0
0 seconds
20354 eric-wieser
author:eric-wieser
 feat: generalize `ContinuousLinearMap.curry` to TVS Follow on from #10777 --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-analysis 57/25 Mathlib/Analysis/NormedSpace/Multilinear/Curry.lean 1 3 ['eric-wieser', 'github-actions', 'leanprover-community-bot-assistant'] nobody
384-51626
1 year ago
unknown
0-0
0 seconds
8511 eric-wieser
author:eric-wieser
 refactor(MeasureTheory/Measure/Haar/Basic): partially generalize to the affine case Without a `Mul` version of `AddTorsor`, this generalization can only go so far. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict awaiting-author t-measure-probability 52/46 Mathlib/MeasureTheory/Measure/Haar/Basic.lean 1 0 [] nobody
384-51437
1 year ago
915-23117
915 days ago
0-7
7 seconds
7994 ericrbg
author:ericrbg
 chore: generalize `LieSubalgebra.mem_map_submodule` --- Not sure if we should rename to something like `mem_map_iff_mem_map_submodule` or not. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) please-adopt merge-conflict t-algebra
label:t-algebra$
 16/4 Mathlib/Algebra/Lie/SkewAdjoint.lean,Mathlib/Algebra/Lie/Subalgebra.lean 2 3 ['eric-wieser', 'ericrbg'] nobody
384-51425
1 year ago
937-46420
937 days ago
0-1
1 second
6317 eric-wieser
author:eric-wieser
 refactor(Data/Finsupp/Defs): make Finsupp.single defeq to Pi.single By adding a `DecidableEq ι` argument to `Finsupp.single`, we remove the reference to `Classical.decEq ι` in the definition, which in turn means that when coerced to a function it is now defeq to `Pi.single`. This also brings it in line with `DFinsupp.single`. This does not go as far as making `Finsupp.single` computable. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict WIP t-data 269/226 Mathlib/Algebra/BigOperators/Finsupp.lean,Mathlib/Data/Finsupp/AList.lean,Mathlib/Data/Finsupp/Basic.lean,Mathlib/Data/Finsupp/Defs.lean,Mathlib/Data/Finsupp/Fintype.lean,Mathlib/Data/Finsupp/Indicator.lean,Mathlib/Data/Finsupp/Multiset.lean,Mathlib/Data/Finsupp/Order.lean,Mathlib/Data/Finsupp/ToDFinsupp.lean,Mathlib/Data/Nat/Choose/Multinomial.lean,Mathlib/LinearAlgebra/Basis.lean,Mathlib/LinearAlgebra/Finsupp.lean 12 0 [] nobody
384-51419
1 year ago
unknown
0-0
0 seconds
6277 jjaassoonn
author:jjaassoonn
 Dimension theory Some results are - The ring Krull dimension and the topological dimension of the prime spectrum of a ring are the same - A field is zero-dimensional and a PID that is not a field is one dimensional - An Artinian ring is zero-dimensional - The Krull dimension of ring $R$ is equal to the supremum of heights of maximal ideals [00KG](https://stacks.math.columbia.edu/tag/00KG) - two definitions of module length agree - A module is finite length iff both artinian and noetherian - length of module $M$ is equal to the sum of length of $N$ and length of $M / N$ where $N$ is a submodule of $M$. - Noetherian ring has only finitely many minimal primes #9088 - In a zero dimensional ring, prime ideals are maximal - Artinian rings has finitely many maximal ideals #9087 - zero-dimensional rings with finitely many prime ideals are products of its localizations: $R \cong \prod_{\mathfrak{p}}R_{\mathfrak{p}}$ - Let $M_0 \le ... \le M_n$, then $l(M_n/ M_0) = l(M_1/M_0) + l(M_2/M_1) + ... + l(M_n/M_{n-1})$ where $l$ denotes module length. - If $f : R \to S$ is a ring homomorphism and $M$ an $S$-module, then $l_R(M) \le l_S(M)$, when $f$ is surjective then they are equal. (Note that this is expressed using `[Algebra R S]` and `RestrictScalars R S M`, instead of a literal ring hom) - Artinian rings are noetherian ring of dimension 0. - For 0-dimensional local ring, its maximal ideal is locally nilpotent - In notherian ring, $I \le \sqrt{J}$ implies $I ^ n \le J$ for some $n$ --- - [x] depends on: #6309 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-algebra
label:t-algebra$
 3289/459 Mathlib.lean,Mathlib/Algebra/Module/Length.lean,Mathlib/Algebra/Module/Submodule/JordanHolder.lean,Mathlib/Algebra/PUnitInstances.lean,Mathlib/AlgebraicGeometry/PrimeSpectrum/ArtinianAndNoetherian.lean,Mathlib/Data/List/Basic.lean,Mathlib/Data/List/Dedup.lean,Mathlib/Data/List/Nodup.lean,Mathlib/LinearAlgebra/Quotient.lean,Mathlib/Order/Cover.lean,Mathlib/Order/JordanHolder.lean,Mathlib/Order/KrullDimension.lean,Mathlib/Order/ListOnPartialOrderTypes.lean,Mathlib/Order/Monotone/Basic.lean,Mathlib/Order/RelSeries.lean,Mathlib/RingTheory/Artinian.lean,Mathlib/RingTheory/Finiteness.lean,Mathlib/RingTheory/Ideal/Operations.lean,Mathlib/RingTheory/Ideal/Pi.lean,Mathlib/RingTheory/KrullDimension.lean,Mathlib/RingTheory/Noetherian.lean,Mathlib/RingTheory/SimpleModule.lean,Mathlib/Topology/KrullDimension.lean,Mathlib/Topology/Sheaves/SheafCondition/EqualizerProducts.lean 24 11 ['alreadydone', 'jjaassoonn', 'leanprover-community-mathlib4-bot'] nobody
384-51414
1 year ago
unknown
0-0
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8536 jjaassoonn
author:jjaassoonn
 characteristic predicate of tensor product --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-algebra
label:t-algebra$
 399/7 Mathlib/Algebra/Category/AlgebraCat/Monoidal.lean,Mathlib/LinearAlgebra/IsTensorProduct.lean,Mathlib/LinearAlgebra/TensorProduct.lean,Mathlib/LinearAlgebra/TensorProduct/Tower.lean 4 12 ['alreadydone', 'eric-wieser', 'jjaassoonn'] nobody
384-51367
1 year ago
unknown
0-0
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11524 mcdoll
author:mcdoll
 refactor: Introduce type-class for SchwartzMap --- There are a lot of other refactors to do (`seminormAux` should have a nicer name and gobble up more theorems from `seminorm`), then one can prove `integrable` and friends with only `SchwartzMapClass`. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict WIP t-analysis 139/137 Mathlib/Analysis/Distribution/SchwartzSpace.lean,Mathlib/Analysis/Fourier/PoissonSummation.lean,Mathlib/Topology/ContinuousFunction/ZeroAtInfty.lean 3 0 [] nobody
384-51333
1 year ago
unknown
0-0
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11003 thorimur
author:thorimur
 chore: migrate to `tfae` block tactic Migrates to the `tfae` block tactic syntax, eliminating uses of `tfae_have` and `tfae_finish`. --- - [ ] depends on: #11000 - [ ] depends on: #10991 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict WIP blocked-by-other-PR t-meta 1267/1081 Mathlib/Algebra/Exact.lean,Mathlib/Algebra/Homology/ShortComplex/ExactFunctor.lean,Mathlib/Algebra/Order/ToIntervalMod.lean,Mathlib/Analysis/BoxIntegral/Box/Basic.lean,Mathlib/Analysis/InnerProductSpace/Basic.lean,Mathlib/Analysis/LocallyConvex/WithSeminorms.lean,Mathlib/Analysis/NormedSpace/OperatorNorm/NormedSpace.lean,Mathlib/Analysis/RCLike/Basic.lean,Mathlib/Analysis/SpecificLimits/Normed.lean,Mathlib/CategoryTheory/Abelian/Exact.lean,Mathlib/CategoryTheory/Bicategory/Kan/Adjunction.lean,Mathlib/FieldTheory/Galois.lean,Mathlib/FieldTheory/KummerExtension.lean,Mathlib/GroupTheory/Nilpotent.lean,Mathlib/LinearAlgebra/Eigenspace/Zero.lean,Mathlib/MeasureTheory/Group/Action.lean,Mathlib/NumberTheory/FLT/Basic.lean,Mathlib/Order/CompactlyGenerated/Basic.lean,Mathlib/Order/Height.lean,Mathlib/Order/WellFoundedSet.lean,Mathlib/RingTheory/Bezout.lean,Mathlib/RingTheory/DiscreteValuationRing/TFAE.lean,Mathlib/RingTheory/Flat/EquationalCriterion.lean,Mathlib/RingTheory/Henselian.lean,Mathlib/RingTheory/LocalRing/RingHom/Basic.lean,Mathlib/RingTheory/Valuation/Basic.lean,Mathlib/RingTheory/Valuation/ValuationRing.lean,Mathlib/SetTheory/Ordinal/Topology.lean,Mathlib/Tactic/TFAE.lean,Mathlib/Topology/Algebra/Group/SubmonoidClosure.lean,Mathlib/Topology/Category/CompHaus/EffectiveEpi.lean,Mathlib/Topology/Category/Profinite/EffectiveEpi.lean,Mathlib/Topology/Category/Stonean/EffectiveEpi.lean,Mathlib/Topology/Inseparable.lean,Mathlib/Topology/LocallyClosed.lean,Mathlib/Topology/LocallyConstant/Basic.lean,Mathlib/Topology/NoetherianSpace.lean,Mathlib/Topology/Order/LeftRightNhds.lean,Mathlib/Topology/Separation.lean,Mathlib/Topology/UniformSpace/UniformConvergence.lean,scripts/noshake.json,test/tfae.lean 42 2 ['github-actions', 'leanprover-community-mathlib4-bot'] nobody
384-51329
1 year ago
613-12702
613 days ago
3-60883
3 days
9819 jjaassoonn
author:jjaassoonn
 fg graded ring 1. if $A$ is a noetherian graded ring, then $A_0$ is a noetherian subring of $A$ and $A$ is a finitely generated algebra over $A_0$, if $M$ is a finitely generated graded module over $A$, then each $M_n$ is a finitely generated module over $A_0$. 2. Definition of additive functions over any abelian category: if $C$ is an abelian category, a function $f : C \to \mathbb Z$ is said to be additive, if $f(y) = f(x) + f(z)$ whenever $0\to x \to y \to z \to 0$ is exact. proved some basic properties such as $f(0) = 0$ and $f(x) = f(y)$ whenever $x \cong y$ and interaction of $f$ with longer exact sequences 3. The category of finitely generated module over noetherian ring is abelian 4. A proof of Hilbert-Serre theorem: the Poincare series is actually of the form $\frac{p}{\prod(1- X^i)}$ where $p$ is polynomial The code works, but poorly written. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict WIP t-algebra
label:t-algebra$
 6745/217 Mathlib.lean,Mathlib/Algebra/Category/FGModuleCat/Abelian.lean,Mathlib/Algebra/Category/FGModuleCat/Basic.lean,Mathlib/Algebra/Category/FGModuleCat/EpiMono.lean,Mathlib/Algebra/Category/FGModuleCat/Kernels.lean,Mathlib/Algebra/Category/FGModuleCat/Limits.lean,Mathlib/Algebra/DirectSum/Basic.lean,Mathlib/Algebra/GradedMonoid.lean,Mathlib/Algebra/HilbertSerre/AdditiveFunction.lean,Mathlib/Algebra/HilbertSerre/FiniteInstances.lean,Mathlib/Algebra/HilbertSerre/HilbertPolynomial.lean,Mathlib/Algebra/HilbertSerre/Theorem.lean,Mathlib/Algebra/Module/GradeZeroModule.lean,Mathlib/Algebra/Module/GradedModule.lean,Mathlib/AlgebraicGeometry/ProjectiveSpectrum/Topology.lean,Mathlib/RingTheory/FiniteType.lean,Mathlib/RingTheory/Finiteness.lean,Mathlib/RingTheory/GradedAlgebra/Basic.lean,Mathlib/RingTheory/GradedAlgebra/HomogeneousIdeal.lean,Mathlib/RingTheory/GradedAlgebra/Noetherian.lean,Mathlib/RingTheory/GradedAlgebra/Radical.lean,Mathlib/RingTheory/GradedAlgebra/Subgrading.lean,Mathlib/RingTheory/Polynomial/Hilbert.lean,Mathlib/RingTheory/PowerSeries/Basic.lean,Mathlib/RingTheory/PowerSeries/WellKnown.lean 25 2 ['FMLJohn', 'github-actions'] nobody
384-51315
1 year ago
unknown
0-0
0 seconds
14348 eric-wieser
author:eric-wieser
 perf: disable the `unusedVariables` linter for speed I doubt we want to merge this, but it shaves two minutes of the lint time. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) performance-hack 1/0 lakefile.lean 1 3 ['eric-wieser', 'github-actions', 'leanprover-bot'] nobody
384-51199
1 year ago
unknown
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13543 adomani
author:adomani
 test: automatically undeprecate A test for `update_deprecations`. There are two files with deprecated declarations, but CI automatically fixes them, so that they pass the noisy tests (as well as passing fail-on-warning `lake build`). --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-linter 345/4 .github/workflows/bors.yml,.github/workflows/build.yml,.github/workflows/build.yml.in,.github/workflows/build_fork.yml,Mathlib.lean,Mathlib/Tactic.lean,Mathlib/Tactic/UpdateDeprecations.lean,Mathlib/test_depr.lean,Mathlib/test_depr_no_change.lean,lakefile.lean,scripts/update_deprecations.lean,test/UpdateDeprecations.lean 12 0 [] nobody
384-51166
1 year ago
unknown
0-0
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14932 eric-wieser
author:eric-wieser
 chore: add nndist versions of lemmas --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-analysis 108/1 Mathlib/Analysis/InnerProductSpace/Basic.lean,Mathlib/Geometry/Euclidean/Basic.lean 2 1 ['github-actions'] nobody
384-50979
1 year ago
unknown
0-0
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18202 ADedecker
author:ADedecker
 chore: refactor algebraic filter bases --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-topology t-algebra
label:t-algebra$
 1086/1315 Mathlib/Analysis/Distribution/SchwartzSpace.lean,Mathlib/Analysis/LocallyConvex/AbsConvex.lean,Mathlib/Analysis/LocallyConvex/Barrelled.lean,Mathlib/Analysis/LocallyConvex/WeakDual.lean,Mathlib/Analysis/LocallyConvex/WithSeminorms.lean,Mathlib/Analysis/Normed/Operator/WeakOperatorTopology.lean,Mathlib/FieldTheory/KrullTopology.lean,Mathlib/RingTheory/DedekindDomain/FiniteAdeleRing.lean,Mathlib/Topology/Algebra/FilterBasis.lean,Mathlib/Topology/Algebra/Module/UniformConvergence.lean,Mathlib/Topology/Algebra/Nonarchimedean/AdicTopology.lean,Mathlib/Topology/Algebra/Nonarchimedean/Bases.lean,Mathlib/Topology/Algebra/UniformFilterBasis.lean,Mathlib/Topology/Algebra/Valued/ValuationTopology.lean 14 1 ['github-actions'] nobody
383-43650
1 year ago
unknown
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22488 smmercuri
author:smmercuri
 fix: lower priority for `UniformSpace.Completion.instSMul` Following the introduction of the `WithVal` type synonym in #22055 the following instance takes a long time to synthesise in FLT, and times out in the default heartbeats ```lean import Mathlib namespace IsDedekindDomain.HeightOneSpectrum variable (A K : Type*) [CommRing A] [Field K] [Algebra A K] [IsFractionRing A K] [IsDedekindDomain A] (v : HeightOneSpectrum A) #synth SMul (v.adicCompletionIntegers K) (v.adicCompletion K) ``` The issue is that `UniformSpace.Completion.instSMul (v.adicCompletionIntegers K) (v.adicCompletion K)` now fires during the start of instance search (because we now have `UniformSpace (WithVal (v.valuation K))` whereas previously this would be `UniformSpace K`, which was not automatic), and this takes a long time to fail (leading to ~1400 entries in the trace). The first few lines of the new trace is ```lean [Meta.synthInstance] [5.512418] ✅️ SMul (↥(adicCompletionIntegers K v)) (adicCompletion K v) ▼ [] [0.000118] new goal SMul (↥(adicCompletionIntegers K v)) (adicCompletion K v) ▶ [] [0.000537] ✅️ apply UniformSpace.Completion.instSMul to SMul (↥(adicCompletionIntegers K v)) (adicCompletion K v) ▶ [] [0.004411] ✅️ apply @WithVal.instSMul to SMul (↥(adicCompletionIntegers K v)) (WithVal (valuation K v)) ▶ [] [0.000765] ❌️ apply @GradedMonoid.GradeZero.smul to SMul (↥(adicCompletionIntegers K v)) K ▶ [] [0.000378] ✅️ apply @Algebra.toSMul to SMul (↥(adicCompletionIntegers K v)) K ▶ ... [] 1339 more entries... ▶ ``` Lowering the priority of `UniformSpace.Completion.instSMul` fixes this particular issue, leading to a trace that matches that seen prior to the introduction of `WithVal`: ```lean [Meta.synthInstance] [0.016405] ✅️ SMul (↥(adicCompletionIntegers K v)) (adicCompletion K v) ▼ [] [0.000119] new goal SMul (↥(adicCompletionIntegers K v)) (adicCompletion K v) ▶ [] [0.000491] ❌️ apply @GradedMonoid.GradeZero.smul to SMul (↥(adicCompletionIntegers K v)) (adicCompletion K v) ▶ [] [0.000403] ✅️ apply @Algebra.toSMul to SMul (↥(adicCompletionIntegers K v)) (adicCompletion K v) ▶ [] [0.000134] ❌️ apply inst✝⁴ to Algebra (↥(adicCompletionIntegers K v)) (adicCompletion K v) ▶ [] [0.000093] ❌️ apply inst✝⁵ to Algebra (↥(adicCompletionIntegers K v)) (adicCompletion K v) ▶ [] [0.000077] ❌️ apply inst✝⁷ to Algebra (↥(adicCompletionIntegers K v)) (adicCompletion K v) ▶ [] [0.000082] ❌️ apply inst✝⁹ to Algebra (↥(adicCompletionIntegers K v)) (adicCompletion K v) ▶ [] [0.000075] ❌️ apply inst✝¹² to Algebra (↥(adicCompletionIntegers K v)) (adicCompletion K v) ▶ [] [0.000220] ❌️ apply Algebra.id to Algebra (↥(adicCompletionIntegers K v)) (adicCompletion K v) ▶ [] [0.001015] ✅️ apply @ValuationSubring.instAlgebraSubtypeMem to Algebra (↥(adicCompletionIntegers K v)) (adicCompletion K v) ▶ [resume] [0.000038] propagating Algebra (↥(adicCompletionIntegers K v)) (adicCompletion K v) to subgoal Algebra (↥(adicCompletionIntegers K v)) (adicCompletion K v) of SMul (↥(adicCompletionIntegers K v)) (adicCompletion K v) ▶ [check] [0.013358] ✅️ Algebra.toSMul [] result Algebra.toSMul ``` --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) awaiting-author t-topology FLT 1/1 Mathlib/Topology/Algebra/UniformMulAction.lean 1 10 ['github-actions', 'leanprover-bot', 'smmercuri', 'urkud'] nobody
383-34983
1 year ago
389-63535
389 days ago
55-70108
55 days
15161 adomani
author:adomani
 feat(Linter): flag `intros x y` which can be replaced by `intro x y` --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) WIP t-linter 78/1 Mathlib/Tactic/Linter/Lint.lean,test/Lint.lean 2 4 ['adomani', 'github-actions', 'grunweg'] nobody
383-6058
1 year ago
unknown
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15654 TpmKranz
author:TpmKranz
 feat(Computability): language-preserving maps between NFA and RE Map REs to NFAs via Thompson's construction and NFAs to REs using GNFAs Last chunk of #12648 --- - [ ] depends on: #15651 - [ ] depends on: #15649 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) blocked-by-other-PR new-contributor t-computability merge-conflict awaiting-zulip 985/2 Mathlib.lean,Mathlib/Computability/GNFA.lean,Mathlib/Computability/Language.lean,Mathlib/Computability/NFA.lean,Mathlib/Computability/RegularExpressions.lean,Mathlib/Data/FinEnum/Option.lean,docs/references.bib 7 3 ['github-actions', 'leanprover-community-mathlib4-bot', 'meithecatte'] nobody
381-84848
1 year ago
651-21633
651 days ago
0-179
2 minutes
19315 quangvdao
author:quangvdao
 feat(Data/Finsupp/Fin): Add `Finsupp` operations on `Fin` tuple This PR adds more analogues of operations on `Fin` tuples to the `Finsupp` setting. Before, there were only `Finsupp.cons` and `Finsupp.tail`. Now there are also `Finsupp.snoc`, `Finsupp.insertNth`, `Finsupp.init`, and `Finsupp.removeNth`. These all come with supporting lemmas. I also removed the porting comment about `succAboveCases` in `Data/Fin/Basic`, and added a lemma about `succAbove` in `Data/Fin/Tuple/Basic`. --- - [x] depends on: #20361 - [x] depends on: #20771 - [x] depends on: #20770 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict awaiting-author t-data 193/16 Mathlib/Algebra/BigOperators/Fin.lean,Mathlib/Algebra/BigOperators/Finsupp.lean,Mathlib/Algebra/MvPolynomial/Equiv.lean,Mathlib/Data/Finsupp/Fin.lean,Mathlib/RingTheory/MvPolynomial/Homogeneous.lean,scripts/nolints_prime_decls.txt 6 44 ['YaelDillies', 'github-actions', 'j-loreaux', 'kbuzzard', 'mathlib4-dependent-issues-bot', 'quangvdao'] nobody
381-409
1 year ago
458-25432
458 days ago
43-80684
43 days
19464 adomani
author:adomani
 test: removed merge-conflict --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict WIP CI delegated 22/1 .github/workflows/PR_summary.yml,scripts/zulip_emoji_merge_delegate.py 2 10 ['adomani', 'github-actions', 'leanprover-community-bot-assistant'] nobody
380-11733
1 year ago
unknown
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24155 eric-wieser
author:eric-wieser
 feat: add a "rw_proc" for fin vectors This seems a little nicer than an elaborator, since it means I can use the default elaboration rules to handle my first few variables. Ideally there would be something like ```lean rw_procQ {A : Type u} {B : A -> Type v} (a : A) (b : B a) : b = ?rhs => do /-- Context: u v : Level A : Q(Type u) B : Q($A -> Type v) a : Q($A) b : Q($B $a) rhs : Q($B $a) -- metavariable to assign |- MetaM Q($b = ?rhs) -/ ``` or ```lean rw_proc {A : Type u} {B : A -> Type v} (a : A) (b : B a) : b = ?rhs => do /-- Context: u v : Level A B a b : Expr rhs : MVarId |- MetaM Expr -/ ``` which would generate the code I wrote here --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) awaiting-author RFC t-data t-meta 27/2 Mathlib/Data/Fin/Tuple/Reflection.lean 1 2 ['github-actions', 'urkud'] nobody
378-82689
1 year ago
378-82689
378 days ago
20-83091
20 days
21276 GabinKolly
author:GabinKolly
 feat(ModelTheory/Substructures): define equivalences between equal substructures Define first-order equivalences between equal substructures, and prove related properties. --- This is some preparatory work for #18876 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) awaiting-author t-logic 62/0 Mathlib/ModelTheory/Substructures.lean 1 19 ['GabinKolly', 'YaelDillies', 'fpvandoorn', 'github-actions', 'grunweg'] nobody
378-18483
1 year ago
378-18483
378 days ago
46-55730
46 days
24008 meithecatte
author:meithecatte
 chore(EpsilonNFA): replace manual lemmas with @[simps] --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-computability awaiting-author new-contributor 2/24 Mathlib/Computability/EpsilonNFA.lean 1 2 ['YaelDillies', 'github-actions', 'urkud'] nobody
376-44027
1 year ago
376-44027
376 days ago
27-52316
27 days
24642 grunweg
author:grunweg
 WIP-feat: add layercake formula for ENNReal-valued functions Not much to see here yet; some significant amount of work remains. --- - [ ] depends on: #24643 - [ ] depends on: #24640 (based on that PR for simplicity) [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict WIP carleson t-analysis 189/24 Mathlib/Analysis/SpecialFunctions/Pow/Integral.lean,Mathlib/MeasureTheory/Function/LpSeminorm/Basic.lean,Mathlib/MeasureTheory/Function/LpSpace/Basic.lean,Mathlib/MeasureTheory/Integral/Layercake.lean 4 3 ['github-actions', 'leanprover-community-bot-assistant', 'mathlib4-dependent-issues-bot'] nobody
375-20408
1 year ago
unknown
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21712 grunweg
author:grunweg
 chore: generalise more lemmas to `ContinuousENorm` --- - [x] depends on: #21781 (minor drive-by clean-up) - [x] depends on: #21670 - [x] depends on: #22708 (extracted from this) - some parts depend on #21433 (or better: #22175); when the dependent PR has landed, I will re-assess whether to split these into a separate PR [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict carleson awaiting-CI t-measure-probability 76/31 Mathlib/Analysis/Normed/MulAction.lean,Mathlib/MeasureTheory/Function/LpSeminorm/Basic.lean,Mathlib/MeasureTheory/Function/LpSpace/Basic.lean,Mathlib/MeasureTheory/Function/LpSpace/ContinuousFunctions.lean 4 5 ['github-actions', 'grunweg', 'leanprover-community-bot-assistant', 'mathlib4-dependent-issues-bot'] nobody
374-42092
1 year ago
unknown
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21375 grunweg
author:grunweg
 WIP: generalise lemmas to ENorm This work is part of (and a necessary pre-requisite for) the Carleson project. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) WIP awaiting-CI t-measure-probability carleson merge-conflict 471/221 Mathlib/Analysis/NormedSpace/IndicatorFunction.lean,Mathlib/MeasureTheory/Function/L2Space.lean,Mathlib/MeasureTheory/Function/LocallyIntegrable.lean,Mathlib/MeasureTheory/Function/LpOrder.lean,Mathlib/MeasureTheory/Function/LpSeminorm/Basic.lean,Mathlib/MeasureTheory/Function/LpSeminorm/ChebyshevMarkov.lean,Mathlib/MeasureTheory/Function/LpSeminorm/CompareExp.lean,Mathlib/MeasureTheory/Function/LpSeminorm/TriangleInequality.lean,Mathlib/MeasureTheory/Function/LpSeminorm/Trim.lean,Mathlib/MeasureTheory/Function/LpSpace.lean,Mathlib/MeasureTheory/Function/SimpleFuncDenseLp.lean,Mathlib/MeasureTheory/Function/UniformIntegrable.lean,Mathlib/Probability/Independence/Integrable.lean 13 2 ['fpvandoorn', 'grunweg'] nobody
374-36467
1 year ago
unknown
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24378 urkud
author:urkud
 feat(Algebra/Order/Field/Basic): generalize lemmas ... from linear ordered semifields to (commutative) groups with zero. --- I'm going to do another round of generalizing today or tomorrow, so making it a draft PR for now. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-algebra
label:t-algebra$
 183/181 Archive/OxfordInvariants/Summer2021/Week3P1.lean,Mathlib/Algebra/Order/Field/Basic.lean,Mathlib/Algebra/Order/Floor/Ring.lean,Mathlib/Algebra/Order/Floor/Semiring.lean,Mathlib/Algebra/Order/GroupWithZero/Unbundled/Basic.lean,Mathlib/Analysis/Analytic/Basic.lean,Mathlib/Analysis/Asymptotics/Lemmas.lean,Mathlib/Analysis/CStarAlgebra/ApproximateUnit.lean,Mathlib/Analysis/Calculus/BumpFunction/Basic.lean,Mathlib/Analysis/Calculus/BumpFunction/FiniteDimension.lean,Mathlib/Analysis/Calculus/BumpFunction/InnerProduct.lean,Mathlib/Analysis/Complex/AbelLimit.lean,Mathlib/Analysis/Complex/Hadamard.lean,Mathlib/Analysis/Convex/Segment.lean,Mathlib/Analysis/Convex/SpecificFunctions/Basic.lean,Mathlib/Analysis/Convex/SpecificFunctions/Pow.lean,Mathlib/Analysis/Convex/StrictConvexSpace.lean,Mathlib/Analysis/Convex/Uniform.lean,Mathlib/Analysis/Convex/Visible.lean,Mathlib/Analysis/Fourier/RiemannLebesgueLemma.lean,Mathlib/Analysis/FunctionalSpaces/SobolevInequality.lean,Mathlib/Analysis/MeanInequalitiesPow.lean,Mathlib/Analysis/Normed/Field/Lemmas.lean,Mathlib/Analysis/Normed/Field/Ultra.lean,Mathlib/Analysis/Normed/Unbundled/SmoothingSeminorm.lean,Mathlib/Analysis/NormedSpace/HomeomorphBall.lean,Mathlib/Analysis/NormedSpace/OperatorNorm/NormedSpace.lean,Mathlib/Analysis/NormedSpace/Pointwise.lean,Mathlib/Analysis/SpecialFunctions/Complex/Arg.lean,Mathlib/Analysis/SpecialFunctions/Gamma/Beta.lean,Mathlib/Analysis/SpecialFunctions/Log/Deriv.lean,Mathlib/Analysis/SpecialFunctions/MulExpNegMulSqIntegral.lean,Mathlib/Analysis/SpecialFunctions/SmoothTransition.lean,Mathlib/Analysis/SpecialFunctions/Trigonometric/Bounds.lean,Mathlib/Analysis/SpecificLimits/Basic.lean,Mathlib/Analysis/SpecificLimits/FloorPow.lean,Mathlib/Analysis/SpecificLimits/Normed.lean,Mathlib/Combinatorics/Additive/AP/Three/Behrend.lean,Mathlib/Combinatorics/Schnirelmann.lean,Mathlib/Combinatorics/SimpleGraph/Regularity/Chunk.lean,Mathlib/Computability/AkraBazzi/AkraBazzi.lean,Mathlib/Computability/AkraBazzi/GrowsPolynomially.lean,Mathlib/Data/Nat/Cast/Order/Field.lean,Mathlib/Data/Real/Archimedean.lean,Mathlib/Data/Real/Cardinality.lean,Mathlib/Data/Real/Pi/Wallis.lean,Mathlib/Geometry/Euclidean/Angle/Unoriented/Affine.lean,Mathlib/Geometry/Euclidean/Angle/Unoriented/RightAngle.lean,Mathlib/Geometry/Euclidean/Sphere/Tangent.lean,Mathlib/MeasureTheory/Function/StronglyMeasurable/Basic.lean,Mathlib/MeasureTheory/Function/UniformIntegrable.lean,Mathlib/MeasureTheory/Integral/CircleIntegral.lean,Mathlib/MeasureTheory/Integral/MeanInequalities.lean,Mathlib/MeasureTheory/Integral/PeakFunction.lean,Mathlib/MeasureTheory/Measure/SeparableMeasure.lean,Mathlib/NumberTheory/Bertrand.lean,Mathlib/NumberTheory/ClassNumber/AdmissibleAbs.lean,Mathlib/NumberTheory/DiophantineApproximation/Basic.lean,Mathlib/NumberTheory/LSeries/Injectivity.lean,Mathlib/NumberTheory/LSeries/ZMod.lean,Mathlib/NumberTheory/NumberField/Discriminant/Basic.lean,Mathlib/NumberTheory/Padics/Hensel.lean,Mathlib/NumberTheory/Padics/MahlerBasis.lean,Mathlib/NumberTheory/Pell.lean,Mathlib/NumberTheory/Transcendental/Liouville/LiouvilleNumber.lean,Mathlib/Order/Filter/AtTopBot/Floor.lean,Mathlib/Order/Interval/Set/IsoIoo.lean,Mathlib/Probability/StrongLaw.lean,Mathlib/RingTheory/Perfection.lean,Mathlib/Topology/ContinuousMap/Polynomial.lean,Mathlib/Topology/Instances/AddCircle.lean,Mathlib/Topology/UrysohnsLemma.lean 72 3 ['github-actions', 'leanprover-community-bot-assistant'] nobody
374-20797
1 year ago
391-63749
391 days ago
0-14
14 seconds
24618 b-mehta
author:b-mehta
 feat(Analysis): add Schur inequality and variants Add Schur inequality and some of its common variants. TODO: - [x] add reference to source: https://www.cip.ifi.lmu.de/~grinberg/VornicuS.pdf - [ ] add other generalisations - [ ] move some of the lemmas elsewhere --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) WIP t-analysis 145/0 Mathlib/Analysis/Convex/Schur.lean 1 16 ['b-mehta', 'eric-wieser', 'github-actions'] nobody
373-31560
1 year ago
382-11562
382 days ago
0-2
2 seconds
15115 kkytola
author:kkytola
 feat: Generalize assumptions in liminf and limsup results in ENNReals In a [review comment](https://github.com/leanprover-community/mathlib4/pull/13938#discussion_r1649744441) it was pointed out that results about liminf and limsup in ENNReal hold under milder assumptions. This PR does the generalization. --- This PR is split off from #13938, where the review comment was made. The changes needed for the suggested generalization were of different kind than the simple PR's content, justifying a separate PR. - [x] depends on: #13938 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-order merge-conflict help-wanted awaiting-author t-topology 215/27 Mathlib/MeasureTheory/Measure/Portmanteau.lean,Mathlib/Order/LiminfLimsup.lean,Mathlib/Topology/Instances/ENNReal.lean 3 8 ['Ruben-VandeVelde', 'github-actions', 'grunweg', 'j-loreaux', 'kkytola', 'leanprover-community-mathlib4-bot'] nobody
372-32802
1 year ago
618-25620
618 days ago
21-25493
21 days
24957 eric-wieser
author:eric-wieser
 feat: use ` binderNameHint` in sum_congr Zulip thread: [#new members > Choosing dummy variable inside summation @ 💬](https://leanprover.zulipchat.com/#narrow/channel/113489-new-members/topic/Choosing.20dummy.20variable.20inside.20summation/near/518492888) Co-authored-by: Joachim Breitner --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra merge-conflict
label:t-algebra$
 23/16 Mathlib/Algebra/BigOperators/Expect.lean,Mathlib/Algebra/BigOperators/Group/Finset/Basic.lean,Mathlib/Analysis/BoxIntegral/Partition/Basic.lean,Mathlib/Data/Finset/Fold.lean,Mathlib/Data/Finset/Lattice/Fold.lean,Mathlib/Data/List/OfFn.lean,Mathlib/Data/Multiset/Count.lean,Mathlib/Data/Multiset/Filter.lean,Mathlib/Data/Multiset/MapFold.lean,Mathlib/Data/Option/Basic.lean,Mathlib/Data/Set/Image.lean,Mathlib/Data/Sym/Basic.lean,Mathlib/Data/Sym/Sym2.lean 13 2 ['github-actions', 'mathlib-merge-conflicts'] nobody
371-30704
1 year ago
371-31806
371 days ago
0-424
7 minutes
8495 jjaassoonn
author:jjaassoonn
 feat : Tensor-Hom adjunction in the category of modules # Tensor-Hom adjunction Let $R$ be a commutative ring and $S$ any ring. Let $X$ be an $(S,R)$-bimoule. Then the tensor functor $(X \otimes_R \cdot)$ is a functor from left $R$-modules to left $S$-modules; and the hom-functor $Hom_S(X, \cdot)$ is a functor from left $S$-modules to left $R$-modules. For another left $S$-module $Y$, the left $R$-module structure of $Hom_S(X, Y)$ is given by $s \cdot f := x \mapsto f(s \cdot x)$. These two functors are adjoint.. In particular we have that ```math {\rm Hom}_{S}(X\otimes_R Y, Z) \cong {\rm Hom}_R (Y, {\rm Hom}_S (X, Z)) ``` ## Implementation notes 1. Why not use the `Mathlib/LinearAlgebra/TensorProduct/Tower.lean` In our setting `X` is an `(R, S)` bimodule and `Y` an `R`-module and `Z` an `S`-module so to use the `Tower` file, we need `S` to be an `R`-algebra which is a luxury we do not have. But note that in `Tower` file, `curry` and `uncurry` are both tri-linear maps. So `Tower` file allows interplay of 3 rings which is not allowed in this file. 2. We require `R` to be commutative but we never used anything commutative. This is because of tensor product requires commutativity, but thanks to @alreadydone, this assumption could be removed soon. I think this PR should wait for Junyan's attempt on removing commutativity, so it is marked as draft and wip for now --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict WIP awaiting-author t-algebra
label:t-algebra$
 214/0 Mathlib.lean,Mathlib/Algebra/Category/ModuleCat/TensorHomAdjunction.lean 2 88 ['alreadydone', 'bustercopley', 'eric-wieser', 'github-actions', 'jjaassoonn', 'kbuzzard', 'kim-em', 'leanprover-community-bot-assistant'] eric-wieser
assignee:eric-wieser
370-27338
1 year ago
914-51693
914 days ago
1-57685
1 day
19284 adomani
author:adomani
 test: commit a change only to the "master" CI build action This PR should fail CI, since the main CI build file is incompatible with the autogenerated ones. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict awaiting-author CI 3/3 .github/build.in.yml,.github/workflows/actionlint.yml 2 12 ['adomani', 'bryangingechen', 'github-actions', 'jcommelin', 'leanprover-community-bot-assistant'] bryangingechen
assignee:bryangingechen
368-58742
1 year ago
487-32530
487 days ago
61-913
61 days
15254 yuma-mizuno
author:yuma-mizuno
 feat(CategoryTheory/Monoidal): replace `Mon_` lemmas with `Mon_Class` lemmas We redefine algebras internal to monoidal categories, which were defined by full-bundled structures, in terms of semi-bundled type classes. The original full-bundled structure `X` is renamed to `X_Cat`. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict WIP t-category-theory 3982/96 Mathlib.lean,Mathlib/CategoryTheory/Monoidal/Bimod_Class.lean,Mathlib/CategoryTheory/Monoidal/Bimon_.lean,Mathlib/CategoryTheory/Monoidal/Bimon_Class copy.lean,Mathlib/CategoryTheory/Monoidal/Bimon_Class.lean,Mathlib/CategoryTheory/Monoidal/Braided/Opposite.lean,Mathlib/CategoryTheory/Monoidal/CommMon_Class.lean,Mathlib/CategoryTheory/Monoidal/Comon_.lean,Mathlib/CategoryTheory/Monoidal/Comon_Class.lean,Mathlib/CategoryTheory/Monoidal/Internal/ModuleClass.lean,Mathlib/CategoryTheory/Monoidal/Mod_Class.lean,Mathlib/CategoryTheory/Monoidal/Mon_.lean,Mathlib/CategoryTheory/Monoidal/Mon_Class.lean,Mathlib/CategoryTheory/Monoidal/mwe.lean 14 6 ['YaelDillies', 'github-actions', 'leanprover-community-bot-assistant', 'yuma-mizuno'] nobody
364-84313
11 months ago
unknown
0-0
0 seconds
23489 plp127
author:plp127
 chore: fix recursors Replace motive with `motive` and other improvements. Will probably split this PR after fixing is done. 4013 recursors left --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict WIP 4255/172 Mathlib/Algebra/EuclideanDomain/Basic.lean,Mathlib/Algebra/EuclideanDomain/Defs.lean,Mathlib/Algebra/Free.lean,Mathlib/Algebra/FreeMonoid/Basic.lean,Mathlib/Algebra/Group/Defs.lean,Mathlib/Algebra/Lie/BaseChange.lean,Mathlib/Algebra/Lie/IdealOperations.lean,Mathlib/Algebra/Lie/TraceForm.lean,Mathlib/Algebra/Order/Rearrangement.lean,Mathlib/Algebra/Ring/Subsemiring/Basic.lean,Mathlib/AlgebraicTopology/SimplexCategory/GeneratorsRelations/Basic.lean,Mathlib/Analysis/BoxIntegral/Partition/SubboxInduction.lean,Mathlib/CategoryTheory/Quotient.lean,Mathlib/Data/Fin/Basic.lean,Mathlib/Data/Fin/Tuple/Basic.lean,Mathlib/Data/Fin/Tuple/BubbleSortInduction.lean,Mathlib/Data/Fin/Tuple/NatAntidiagonal.lean,Mathlib/Data/FinEnum/Option.lean,Mathlib/Data/Finset/Max.lean,Mathlib/Data/Fintype/CardEmbedding.lean,Mathlib/Data/Fintype/Option.lean,Mathlib/Data/NNRat/Defs.lean,Mathlib/Data/Nat/BinaryRec.lean,Mathlib/Data/PFun.lean,Mathlib/Data/PFunctor/Multivariate/W.lean,Mathlib/Data/Quot.lean,Mathlib/Data/Sym/Sym2.lean,Mathlib/GroupTheory/Congruence/Defs.lean,Mathlib/GroupTheory/Coprod/Basic.lean,Mathlib/GroupTheory/Coset/Defs.lean,Mathlib/GroupTheory/Coxeter/Basic.lean,Mathlib/LinearAlgebra/Span/Defs.lean,Mathlib/LinearAlgebra/TensorProduct/Tower.lean,Mathlib/NumberTheory/LSeries/HurwitzZetaEven.lean,Mathlib/NumberTheory/LSeries/HurwitzZetaOdd.lean,Mathlib/Order/DirectedInverseSystem.lean,Mathlib/RingTheory/AdicCompletion/Basic.lean,Mathlib/SetTheory/Cardinal/Defs.lean,Mathlib/SetTheory/PGame/Algebra.lean,done.csv,print.lean,working.csv 42 3 ['github-actions', 'leanprover-community-bot-assistant'] nobody
362-28631
11 months ago
unknown
0-0
0 seconds
23349 BGuillemet
author:BGuillemet
 feat: add LocallyLipschitzOn.lipschitzOnWith_of_isCompact and two small lemmas about Lipschitz functions Main feat (in Mathlib/Topology/EMetricSpace/Basic.lean): if a function `f` from an extended pseudometric space to a pseudometric space is locally Lipschitz on a compact subset `s`, then `f` is Lipschitz on `s`. The theorem is true only when the codomain of `f` is a pseudometric space, so it needs imports from Mathlib/Topology/MetricSpace. Other small feat (in Mathlib/Analysis/Calculus/ContDiff/RCLike.lean): a function that is continuously differentiable on an open subset is locally Lipschitz on this subset. --- - [ ] depends on: #22890 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-topology large-import new-contributor 59/4 Mathlib/Analysis/Calculus/ContDiff/RCLike.lean,Mathlib/Topology/EMetricSpace/Lipschitz.lean 2 4 ['github-actions', 'leanprover-community-bot-assistant', 'mathlib4-dependent-issues-bot'] PatrickMassot
assignee:PatrickMassot
360-16368
11 months ago
360-16370
360 days ago
35-30364
35 days
12438 jjaassoonn
author:jjaassoonn
 feat: some APIs for flat modules Need horseshoe lemma --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict WIP t-category-theory 1674/3 Mathlib.lean,Mathlib/Algebra/Category/ModuleCat/Monoidal/Basic.lean,Mathlib/Algebra/Category/ModuleCat/Monoidal/Symmetric.lean,Mathlib/Algebra/Exact.lean,Mathlib/CategoryTheory/Abelian/Basic.lean,Mathlib/CategoryTheory/Abelian/DiagramLemmas/Horseshoe.lean,Mathlib/CategoryTheory/Abelian/LeftDerived.lean,Mathlib/RingTheory/Flat/Basic.lean 8 21 ['erdOne', 'github-actions', 'jjaassoonn', 'joelriou'] nobody
355-28994
11 months ago
756-78265
756 days ago
0-20
20 seconds
17715 adomani
author:adomani
 feat: the unusedVariableCommand linter This is still work-in-progress, but also help-wanted! The linter reliably flags unused variables: so far, only `example`s fool it (and that is simply because I did not implement a fix, as there are very few `variable`s that are only used in `example`s in mathlib). The work-in-progress part refers to the fact that the linter uses an `IO.Ref` to keep track of variables and this does not work well with editing the file. The linter works on a fresh parse of a file, but becomes out-of-sync with every edit. The help-wanted is to ask for help to make mathlib compliant with the linter, by checking out this branch and PR-ing a few variable removals! [Zulip discussion](https://leanprover.zulipchat.com/#narrow/stream/113488-general/topic/Unused.20variables) --- Known issues: * automatic namespacing and `nonrec` may cause difficulty when the newly introduced declaration is preferred in the term, rather than the original one (see examples here ```bash code -r -g ././././Mathlib/Analysis/SpecialFunctions/Arsinh.lean:183 code -r -g ././././Mathlib/Probability/Independence/Basic.lean:368 ``` where, for instance, `ContinuousOn.arsinh` is used internally instead of `Real.arsinh`). * `mutual` declarations confuse the linter ```bash code -r -g ././././Mathlib/SetTheory/Lists.lean:313 ``` * `code -r -g Mathlib/CategoryTheory/EffectiveEpi/Comp.lean:133:29` * universe annotations confuse the linter: ```bash code -r -g ././././Mathlib/Topology/Category/CompactlyGenerated.lean:53 code -r -g ././././Mathlib/AlgebraicTopology/CechNerve.lean:46 ``` * `inductive`s confusing the linter ```bash code -r -g ././././Mathlib/Deprecated/Subgroup.lean:389 code -r -g ././././Mathlib/FieldTheory/PerfectClosure.lean:55 ``` * `def`s confusing the linter ```bash code -r -g ././././Mathlib/Data/MLList/BestFirst.lean:104 ``` * special typeclass assumptions ```code code -r -g ././././Mathlib/RingTheory/WittVector/Truncated.lean:273 code -r -g ././././Mathlib/Topology/Category/Profinite/Product.lean:79 ``` * not sure what is going on here: ```bash code -r -g ././././Mathlib/RingTheory/WittVector/IsPoly.lean:95 code -r -g ././././Mathlib/Probability/Independence/Basic.lean:368 code -r -g ././././Mathlib/Analysis/Calculus/FDeriv/Star.lean:30 ``` [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-linter large-import 695/22 Mathlib.lean,Mathlib/Algebra/Group/Idempotent.lean,Mathlib/Algebra/GroupWithZero/Idempotent.lean,Mathlib/Data/Finite/Defs.lean,Mathlib/Data/Int/Cast/Field.lean,Mathlib/Geometry/Manifold/IntegralCurve/ExistUnique.lean,Mathlib/Init.lean,Mathlib/MeasureTheory/Function/LpSpace/DomAct/Continuous.lean,Mathlib/NumberTheory/LSeries/PrimesInAP.lean,Mathlib/Order/BoundedOrder/Basic.lean,Mathlib/Order/BoundedOrder/Lattice.lean,Mathlib/Order/BoundedOrder/Monotone.lean,Mathlib/Order/Monotone/Monovary.lean,Mathlib/Tactic.lean,Mathlib/Tactic/Linter/UnusedVariableCommand.lean,MathlibTest/UnusedVariableCommand.lean,lakefile.lean 17 3 ['github-actions', 'grunweg', 'leanprover-community-bot-assistant'] nobody
353-23752
11 months ago
585-75185
585 days ago
0-92
1 minute
25473 adomani
author:adomani
 feat(CI): check that Mathlib files have lean or md extension Twice recently there have been files with an "intended" `.lean` extension in `Mathlib/`: * #24942, ending in `;lean`; * #25457, ending in `.Lean`. `mk_all` does not add these files to `Mathlib.lean`, since they do not end in `.lean` and this later causes problems. This CI step checks that all files in `Mathlib/` end with `.lean` or `.md`. See #25474 for a test where the new step [correctly fails](https://github.com/leanprover-community/mathlib4/actions/runs/15464097783/job/43532018379?pr=25474). --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) CI delegated 10/0 .github/workflows/lint_and_suggest_pr.yml 1 10 ['adomani', 'bryangingechen', 'github-actions', 'grunweg', 'mathlib-bors'] nobody
351-32935
11 months ago
351-33826
351 days ago
0-10326
2 hours
16020 adomani
author:adomani
 feat: compare PR `olean`s size with `master` Adds two CI steps: * `print the sizes of the oleans` that prints the sizes of all the folders containing `Mathlib` `.olean`s; * `compare oleans` that compares the sizes of the previous step with the corresponding sizes on `master`. In the test runs, the two steps have taken at most 3 seconds combined (the first is virtually instantaneous, the second one depends on `curl` to find a job id and on `gh` to retrieve the logs of a previous CI run -- everything else appears to be negligible). This hopefully helps finding out if some PR is bloating up the `.olean`s. See [this Zulip discussion](https://leanprover.zulipchat.com/#narrow/stream/287929-mathlib4/topic/Error.3A.20No.20space.20left.20on.20device/near/463792355) for a PR of mine that prompted this check. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict CI 120/0 .github/build.in.yml,.github/workflows/bors.yml,.github/workflows/build.yml,.github/workflows/build_fork.yml,scripts/olean_comparison.sh 5 50 ['Vtec234', 'YaelDillies', 'adomani', 'bryangingechen', 'github-actions', 'grunweg', 'kim-em', 'leanprover-community-bot-assistant', 'mattrobball'] nobody
350-66375
11 months ago
548-27397
548 days ago
87-65841
87 days
16062 adomani
author:adomani
 Test/ci olean size Tests for oleans --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict WIP awaiting-author CI 114/0 .github/build.in.yml,.github/workflows/bors.yml,.github/workflows/build.yml,.github/workflows/build_fork.yml,scripts/olean_comparison.sh 5 4 ['Parcly-Taxel', 'adomani', 'github-actions', 'leanprover-community-bot-assistant'] nobody
350-66375
11 months ago
638-40955
638 days ago
0-16
16 seconds
25507 eric-wieser
author:eric-wieser
 chore(RingTheory/Valuation): golf using `Con` This has no particular motivation besides seeing if `Con` is a performant substitute. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-algebra
label:t-algebra$
 20/35 Mathlib/RingTheory/Valuation/ValuationRing.lean 1 2 ['github-actions', 'leanprover-community-bot-assistant'] nobody
350-57854
11 months ago
unknown
0-0
0 seconds
12799 jstoobysmith
author:jstoobysmith
 feat(LinearAlgebra/UnitaryGroup): Add properties of Special Unitary Group Add properties of the special unitary group, mirroring the properties of found in Algebra/Star/Unitary.lean. In particular, I add an instance of `specialUnitaryGroup` as a `Group`, `Star`, `InvolutiveStar`, and `StarMul`. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) please-adopt t-algebra new-contributor merge-conflict awaiting-author
label:t-algebra$
 78/0 Mathlib/LinearAlgebra/UnitaryGroup.lean 1 8 ['chrisflav', 'jcommelin', 'leanprover-community-bot-assistant'] nobody
349-74721
11 months ago
733-15974
733 days ago
9-22045
9 days
23709 plp127
author:plp127
 feat: `Nat.findFrom` This PR adds `Nat.findFrom`, which is like `Nat.find`, but starting from an arbitrary `k` instead of `0`. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-data 190/47 Mathlib/Data/Nat/Find.lean 1 2 ['github-actions', 'leanprover-community-bot-assistant'] nobody
349-40010
11 months ago
412-5783
412 days ago
0-943
15 minutes
25340 dupuisf
author:dupuisf
 chore(Analysis/Convex): move files pertaining to convex/concave functions to their own folder This PR creates a new folder under `Analysis/Convex` called `Analysis/Convex/Function`, which includes files that are mostly or entirely about convex/concave functions (as opposed to convex sets). --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-convex-geometry 4264/4155 Mathlib.lean,Mathlib/Analysis/Convex/Continuous.lean,Mathlib/Analysis/Convex/Deriv.lean,Mathlib/Analysis/Convex/Exposed.lean,Mathlib/Analysis/Convex/Extrema.lean,Mathlib/Analysis/Convex/Function.lean,Mathlib/Analysis/Convex/Function/Basic.lean,Mathlib/Analysis/Convex/Function/Continuous.lean,Mathlib/Analysis/Convex/Function/Deriv.lean,Mathlib/Analysis/Convex/Function/Extrema.lean,Mathlib/Analysis/Convex/Function/Integral.lean,Mathlib/Analysis/Convex/Function/Jensen.lean,Mathlib/Analysis/Convex/Function/Mul.lean,Mathlib/Analysis/Convex/Function/Piecewise.lean,Mathlib/Analysis/Convex/Function/Quasiconvex.lean,Mathlib/Analysis/Convex/Function/Slope.lean,Mathlib/Analysis/Convex/Function/Strong.lean,Mathlib/Analysis/Convex/Integral.lean,Mathlib/Analysis/Convex/Jensen.lean,Mathlib/Analysis/Convex/Mul.lean,Mathlib/Analysis/Convex/Piecewise.lean,Mathlib/Analysis/Convex/Quasiconvex.lean,Mathlib/Analysis/Convex/Slope.lean,Mathlib/Analysis/Convex/SpecificFunctions/Basic.lean,Mathlib/Analysis/Convex/SpecificFunctions/Deriv.lean,Mathlib/Analysis/Convex/Strong.lean,Mathlib/Analysis/MeanInequalities.lean,Mathlib/Analysis/MeanInequalitiesPow.lean,Mathlib/Analysis/Normed/Module/Convex.lean,Mathlib/Analysis/Seminorm.lean,Mathlib/Analysis/SpecialFunctions/Log/NegMulLog.lean,Mathlib/Analysis/SpecialFunctions/Pochhammer.lean,Mathlib/MeasureTheory/Measure/Decomposition/IntegralRNDeriv.lean,Mathlib/NumberTheory/Harmonic/GammaDeriv.lean 34 2 ['github-actions', 'leanprover-community-bot-assistant'] nobody
349-39195
11 months ago
349-39197
349 days ago
6-38644
6 days
21734 adomani
author:adomani
 fix(PR summary): checkout GITHUB_SHA This should make the version of the script that is used on PRs more stable. Suggested by Eric Wieser on [Zulip](https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/messageFile.2Emd/near/498941855). --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict WIP awaiting-author CI 2/1 .github/workflows/PR_summary.yml 1 2 ['github-actions', 'leanprover-community-bot-assistant'] nobody
348-55862
11 months ago
465-5741
465 days ago
0-6023
1 hour
25579 JovanGerb
author:JovanGerb
 feat(Order/Notation): only allow ⊔/⊓ for non-linear orders ⊔/⊓ is the same as max/min. The difference is that it is meant to be used if and only if there is no linear order. This PR implements a check for one of the two directions. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-order 33/7 Mathlib/Order/Notation.lean 1 1 ['github-actions'] nobody
348-41158
11 months ago
348-70162
348 days ago
0-8
8 seconds
8949 sebzim4500
author:sebzim4500
 Add `by_approx` tactic for proving real inequalities using rational approximation feat: Add `by_approx` tactic for proving real inequalities by finding rational approximations --- ```lean example : |sqrt 2 - 1.414| < 0.001 := by by_approx ``` This is a work in progress, the code is messy and the tactic is often very slow. It also depends on some other PRs that haven't been merged yet. It currently supports basic operations (`+`, `-`, `*`, `/`, `abs`) and has approximation extensions for `sqrt` and `exp`. - [ ] depends on: #8167 - [x] depends on: #8832 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict modifies-tactic-syntax t-meta 1670/3 Mathlib.lean,Mathlib/Data/Int/ModEq.lean,Mathlib/Tactic.lean,Mathlib/Tactic/ByApprox.lean,Mathlib/Tactic/ByApprox/Basic.lean,Mathlib/Tactic/ByApprox/Core.lean,Mathlib/Tactic/ByApprox/Exp.lean,Mathlib/Tactic/ByApprox/Lemmas.lean,Mathlib/Tactic/ByApprox/Test.lean,Mathlib/Tactic/ByApprox/Util.lean,Mathlib/Tactic/GCongr/Core.lean,Mathlib/Tactic/GRW.lean,Mathlib/Tactic/GRW/Core.lean,Mathlib/Tactic/GRW/Lemmas.lean,Mathlib/Tactic/NormNum/NatFactorial.lean,test/ByApprox.lean,test/GRW.lean,test/norm_num_ext.lean 18 1 ['mathlib4-dependent-issues-bot'] nobody
344-79909
11 months ago
unknown
0-0
0 seconds
20334 miguelmarco
author:miguelmarco
 feat: allow polyrith to use a local Singular/Sage install Try to call a local install of Singular (either standalone or inside Sage) to find the witness for polyrith before trying to call the online sage cell server. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict awaiting-author new-contributor t-meta 171/48 Mathlib/Tactic/Polyrith.lean,scripts/polyrith_sage.py 2 16 ['eric-wieser', 'github-actions', 'hanwenzhu', 'kim-em', 'miguelmarco', 'mkoeppe'] nobody
342-67274
11 months ago
481-18855
481 days ago
27-61498
27 days
25911 BoltonBailey
author:BoltonBailey
 make `a / b` simp normal form This PR continues the work from #25631. Original PR: https://github.com/leanprover-community/mathlib4/pull/25631 t-algebra
label:t-algebra$
 11/1 Mathlib/Algebra/Group/Defs.lean 1 2 ['BoltonBailey', 'github-actions'] nobody
341-24623
11 months ago
unknown
0-0
0 seconds
25912 BoltonBailey
author:BoltonBailey
 feat: add simp lemmas for trig functions on `π * 2⁻¹` This PR adds a number of simp lemmas to reduce trig functions evaluated on `π * 2⁻¹`. This allows `simp` to reduce expressions such as `sin (π * (1 / 2))` --- - [ ] depends on: #25911 [experiment with simp normal form] Original PR: #24213 awaiting-author blocked-by-other-PR t-analysis 45/0 Mathlib/Analysis/SpecialFunctions/Trigonometric/Basic.lean 1 3 ['BoltonBailey', 'github-actions', 'mathlib4-dependent-issues-bot'] nobody
341-23336
11 months ago
341-24033
341 days ago
0-136
2 minutes
25918 BoltonBailey
author:BoltonBailey
 feat: one time pad string diagram This PR continues the work from #10655. Original PR: https://github.com/leanprover-community/mathlib4/pull/10655 159/0 MathlibTest/StringDiagram.lean 1 2 ['BoltonBailey', 'github-actions'] nobody
341-22767
11 months ago
unknown
0-0
0 seconds
23953 b-reinke
author:b-reinke
 feat(Data/Matroid/Tutte): define the Tutte polynomial of a matroid This PR defines the Tutte polynomial of a matroid and shows basic properties. - [x] depends on: #23926 - [ ] depends on #24336 - [ ] depends on: #23951 --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict WIP t-data 111/0 Mathlib/Algebra/BigOperators/Finprod.lean,Mathlib/Data/Matroid/Tutte/Basic.lean,Mathlib/Data/Set/Image.lean 3 7 ['apnelson1', 'b-reinke', 'github-actions', 'leanprover-community-bot-assistant', 'mathlib4-dependent-issues-bot'] nobody
340-22354
11 months ago
unknown
0-0
0 seconds
25921 BoltonBailey
author:BoltonBailey
 feat: scripts to analyze overlap between namespaces This PR continues the work from #11385. Original PR: https://github.com/leanprover-community/mathlib4/pull/11385 WIP migrated-from-branch t-meta 86/0 scripts/RecordNamespaces.lean,scripts/namespace-overlap.py 2 1 ['github-actions'] nobody
339-10634
11 months ago
339-10650
339 days ago
2-11832
2 days
18771 joelriou
author:joelriou
 feat(LinearAlgebra/ExteriorPower): exterior powers of free modules are free Co-authored-by: sophie.morel@ens-lyon.fr --- - [ ] depends on: #18662 - [x] depends on: #18534 - [x] depends on: #18651 - [x] depends on: #18590 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict WIP t-algebra blocked-by-other-PR
label:t-algebra$
 1185/160 Mathlib.lean,Mathlib/Analysis/NormedSpace/Multilinear/Curry.lean,Mathlib/Analysis/NormedSpace/PiTensorProduct/ProjectiveSeminorm.lean,Mathlib/Data/Sum/Basic.lean,Mathlib/LinearAlgebra/ExteriorPower/Basic.lean,Mathlib/LinearAlgebra/ExteriorPower/Basis.lean,Mathlib/LinearAlgebra/ExteriorPower/Generators.lean,Mathlib/LinearAlgebra/ExteriorPower/Pairing.lean,Mathlib/LinearAlgebra/Multilinear/Basic.lean,Mathlib/LinearAlgebra/Multilinear/TensorProduct.lean,Mathlib/LinearAlgebra/PiTensorProduct/Basic.lean,Mathlib/LinearAlgebra/PiTensorProduct/Finite.lean,Mathlib/LinearAlgebra/PiTensorProduct/Generators.lean,Mathlib/LinearAlgebra/Span.lean,Mathlib/LinearAlgebra/TensorAlgebra/ToTensorPower.lean,Mathlib/LinearAlgebra/TensorPower/Basic.lean,Mathlib/LinearAlgebra/TensorPower/Pairing.lean,Mathlib/Logic/Function/Basic.lean,Mathlib/RingTheory/PiTensorProduct.lean 19 3 ['alreadydone', 'github-actions', 'mathlib4-dependent-issues-bot'] nobody
337-45491
11 months ago
unknown
0-0
0 seconds
18441 ADedecker
author:ADedecker
 refactor(AdicTopology): use new API for algebraic filter bases, and factor some code --- - [x] depends on: #18437 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-topology t-algebra
label:t-algebra$
 847/159 Mathlib.lean,Mathlib/Topology/Algebra/FilterBasis.lean,Mathlib/Topology/Algebra/FilterBasisNew.lean,Mathlib/Topology/Algebra/Nonarchimedean/AdicTopology.lean,Mathlib/Topology/Algebra/Nonarchimedean/Bases.lean,Mathlib/Topology/Algebra/Nonarchimedean/BasesNew.lean 6 3 ['ADedecker', 'github-actions', 'mathlib4-dependent-issues-bot'] nobody
337-30936
11 months ago
569-28835
569 days ago
0-679
11 minutes
18439 ADedecker
author:ADedecker
 refactor: use new algebraic filter bases API in `FiniteAdeleRing` --- - [x] depends on: #18437 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-topology t-algebra
label:t-algebra$
 699/21 Mathlib.lean,Mathlib/RingTheory/DedekindDomain/FiniteAdeleRing.lean,Mathlib/Topology/Algebra/FilterBasis.lean,Mathlib/Topology/Algebra/FilterBasisNew.lean,Mathlib/Topology/Algebra/Nonarchimedean/Bases.lean,Mathlib/Topology/Algebra/Nonarchimedean/BasesNew.lean 6 2 ['github-actions', 'mathlib4-dependent-issues-bot'] nobody
337-30934
11 months ago
569-30478
569 days ago
0-619
10 minutes
18438 ADedecker
author:ADedecker
 refactor: adapt `KrullTopology` to the new algebraic filter bases API --- - [x] depends on: #18437 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-topology t-algebra
label:t-algebra$
 771/168 Mathlib.lean,Mathlib/FieldTheory/KrullTopology.lean,Mathlib/Topology/Algebra/FilterBasis.lean,Mathlib/Topology/Algebra/FilterBasisNew.lean,Mathlib/Topology/Algebra/Nonarchimedean/Bases.lean,Mathlib/Topology/Algebra/Nonarchimedean/BasesNew.lean 6 5 ['ADedecker', 'AntoineChambert-Loir', 'github-actions', 'mathlib4-dependent-issues-bot'] nobody
337-30933
11 months ago
569-31120
569 days ago
0-638
10 minutes
26239 BoltonBailey
author:BoltonBailey
 feat: add sample pre-commit git hook file This PR adds a sample pre-commit git hook file that runs `mk_all` and `lint-style`. The script provides instructions on how to activate these as git hooks. Installing these would be optional, but hopefully people who would install them would find it easier to avoid commits that immediately fail linters. Discussion of hooks on [Zulip here](https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/Automatic.20setup.20and.20distribution.20of.20git.20hooks/with/525103090). Some thoughts: - Perhaps it would be better, for speed, to attempt to avoid certain commands if the staged changes suggest they would be unnecessary. - i.e. only run linters on files that have been updated / only run `mk_all` if a file has been added or deleted. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) WIP 18/0 git_hooks/pre-commit 1 1 ['github-actions'] nobody
336-2467
11 months ago
336-2467
336 days ago
0-1331
22 minutes
13964 pechersky
author:pechersky
 feat(Data/DigitExpansion): begin defining variant of reals without rationals Based on a de Bruijn 1976 paper. This file is just the basic definition of a digit expansion. Will be followed up with further constructions. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-data 518/0 Mathlib.lean,Mathlib/Data/DigitExpansion/Defs.lean,docs/references.bib 3 11 ['eric-wieser', 'github-actions', 'kim-em', 'pechersky'] dupuisf
assignee:dupuisf
334-13224
11 months ago
572-39440
572 days ago
129-57999
129 days
21450 eric-wieser
author:eric-wieser
 feat: improve trace nodes for `positivity` --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-meta 25/7 Mathlib/Tactic/Positivity/Core.lean 1 1 ['github-actions'] nobody
333-85646
10 months ago
unknown
0-0
0 seconds
26327 eric-wieser
author:eric-wieser
 chore: split the tests for positivity --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) 528/2 MathlibTest/Positivity/basic.lean,MathlibTest/positivity.lean 2 1 ['github-actions'] nobody
332-83663
10 months ago
unknown
0-0
0 seconds
18662 joelriou
author:joelriou
 feat(LinearAlgebra/ExteriorPower): generators of the exterior powers --- - [x] depends on: #18534 - [x] depends on: #18590 - [ ] depends on: #26464 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict WIP t-algebra blocked-by-other-PR
label:t-algebra$
 818/158 Mathlib.lean,Mathlib/Analysis/NormedSpace/Multilinear/Curry.lean,Mathlib/Analysis/NormedSpace/PiTensorProduct/ProjectiveSeminorm.lean,Mathlib/Data/Sum/Basic.lean,Mathlib/LinearAlgebra/ExteriorPower/Basic.lean,Mathlib/LinearAlgebra/ExteriorPower/Generators.lean,Mathlib/LinearAlgebra/Multilinear/Basic.lean,Mathlib/LinearAlgebra/Multilinear/TensorProduct.lean,Mathlib/LinearAlgebra/PiTensorProduct/Basic.lean,Mathlib/LinearAlgebra/PiTensorProduct/Finite.lean,Mathlib/LinearAlgebra/PiTensorProduct/Generators.lean,Mathlib/LinearAlgebra/Span.lean,Mathlib/LinearAlgebra/TensorPower.lean,Mathlib/Logic/Function/Basic.lean,Mathlib/RingTheory/PiTensorProduct.lean 15 2 ['github-actions', 'mathlib4-dependent-issues-bot'] nobody
329-51946
10 months ago
unknown
0-0
0 seconds
18735 joelriou
author:joelriou
 feat(Algebra/Module): presentation of the exterior power Given a presentation of a `R`-module `M`, we obtain a presentation of `⋀[R]^n M`. --- (Still one sorry left.) - [ ] depends on: #18527 - [ ] depends on: #18432 - [ ] depends on: #26464 - [ ] depends on: #18534 - [ ] depends on: #18662 - [x] depends on: #18590 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict WIP t-algebra blocked-by-other-PR
label:t-algebra$
 1856/157 Mathlib.lean,Mathlib/Algebra/Category/ModuleCat/ExteriorPower.lean,Mathlib/Algebra/Module/Presentation/Basic.lean,Mathlib/Algebra/Module/Presentation/ExteriorPower.lean,Mathlib/Algebra/Module/Presentation/PiTensor.lean,Mathlib/Algebra/Module/Presentation/Tensor.lean,Mathlib/Analysis/NormedSpace/Multilinear/Curry.lean,Mathlib/Analysis/NormedSpace/PiTensorProduct/ProjectiveSeminorm.lean,Mathlib/Data/Sum/Basic.lean,Mathlib/LinearAlgebra/ExteriorPower/Basic.lean,Mathlib/LinearAlgebra/ExteriorPower/Generators.lean,Mathlib/LinearAlgebra/Multilinear/Basic.lean,Mathlib/LinearAlgebra/Multilinear/TensorProduct.lean,Mathlib/LinearAlgebra/PiTensorProduct/Basic.lean,Mathlib/LinearAlgebra/PiTensorProduct/Finite.lean,Mathlib/LinearAlgebra/PiTensorProduct/Generators.lean,Mathlib/LinearAlgebra/Span.lean,Mathlib/LinearAlgebra/TensorPower.lean,Mathlib/Logic/Function/Basic.lean,Mathlib/RingTheory/PiTensorProduct.lean 20 2 ['github-actions', 'mathlib4-dependent-issues-bot'] nobody
329-47920
10 months ago
unknown
0-0
0 seconds
26581 nomeata
author:nomeata
 ignore this: Lean pr testing 9124 --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict 1723/1362 Archive/Arithcc.lean,Archive/Examples/Eisenstein.lean,Archive/Examples/IfNormalization/WithoutAesop.lean,Archive/Imo/Imo1972Q5.lean,Archive/Imo/Imo1975Q1.lean,Archive/Imo/Imo1987Q1.lean,Archive/Imo/Imo1994Q1.lean,Archive/Imo/Imo1998Q2.lean,Archive/Imo/Imo2006Q5.lean,Archive/Imo/Imo2008Q3.lean,Archive/Imo/Imo2024Q1.lean,Archive/Imo/Imo2024Q3.lean,Archive/Imo/Imo2024Q5.lean,Archive/MiuLanguage/DecisionNec.lean,Archive/MiuLanguage/DecisionSuf.lean,Archive/Sensitivity.lean,Archive/Wiedijk100Theorems/AbelRuffini.lean,Archive/Wiedijk100Theorems/AreaOfACircle.lean,Archive/Wiedijk100Theorems/AscendingDescendingSequences.lean,Archive/Wiedijk100Theorems/BallotProblem.lean,Archive/Wiedijk100Theorems/BuffonsNeedle.lean,Archive/Wiedijk100Theorems/CubingACube.lean,Archive/Wiedijk100Theorems/FriendshipGraphs.lean,Archive/Wiedijk100Theorems/Partition.lean,Archive/Wiedijk100Theorems/PerfectNumbers.lean,Archive/Wiedijk100Theorems/SumOfPrimeReciprocalsDiverges.lean,Archive/ZagierTwoSquares.lean,Cache/Lean.lean,Counterexamples/AharoniKorman.lean,Counterexamples/CanonicallyOrderedCommSemiringTwoMul.lean,Counterexamples/CliffordAlgebraNotInjective.lean,Counterexamples/DiscreteTopologyNonDiscreteUniformity.lean,Counterexamples/MapFloor.lean,Counterexamples/MonicNonRegular.lean,Counterexamples/Phillips.lean,Counterexamples/Pseudoelement.lean,Counterexamples/ZeroDivisorsInAddMonoidAlgebras.lean,Mathlib/Algebra/Algebra/NonUnitalSubalgebra.lean,Mathlib/Algebra/Algebra/Operations.lean,Mathlib/Algebra/Algebra/Subalgebra/Operations.lean,Mathlib/Algebra/Algebra/Subalgebra/Pointwise.lean,Mathlib/Algebra/Algebra/Unitization.lean,Mathlib/Algebra/Algebra/ZMod.lean,Mathlib/Algebra/BigOperators/Fin.lean,Mathlib/Algebra/BigOperators/Finprod.lean,Mathlib/Algebra/BigOperators/Group/List/Basic.lean,Mathlib/Algebra/Category/ContinuousCohomology/Basic.lean,Mathlib/Algebra/Category/ModuleCat/Topology/Basic.lean,Mathlib/Algebra/Category/ModuleCat/Topology/Homology.lean,Mathlib/Algebra/Category/MonCat/FilteredColimits.lean,Mathlib/Algebra/Category/Ring/Epi.lean,Mathlib/Algebra/Category/Ring/FinitePresentation.lean,Mathlib/Algebra/Category/Ring/Topology.lean,Mathlib/Algebra/CharP/Basic.lean,Mathlib/Algebra/CharP/Defs.lean,Mathlib/Algebra/Colimit/Module.lean,Mathlib/Algebra/DirectSum/Algebra.lean,Mathlib/Algebra/DirectSum/Ring.lean,Mathlib/Algebra/DualNumber.lean,Mathlib/Algebra/Equiv/TransferInstance.lean,Mathlib/Algebra/GCDMonoid/Finset.lean,Mathlib/Algebra/Group/Action/Basic.lean,Mathlib/Algebra/Group/Basic.lean,Mathlib/Algebra/Group/End.lean,Mathlib/Algebra/Group/Pointwise/Finset/Basic.lean,Mathlib/Algebra/Group/Pointwise/Finset/Scalar.lean,Mathlib/Algebra/Group/Pointwise/Set/Basic.lean,Mathlib/Algebra/Group/Subgroup/Basic.lean,Mathlib/Algebra/GroupWithZero/Action/Defs.lean,Mathlib/Algebra/GroupWithZero/NonZeroDivisors.lean,Mathlib/Algebra/Lie/CartanExists.lean,Mathlib/Algebra/Lie/LieTheorem.lean,Mathlib/Algebra/Lie/Weights/Chain.lean,Mathlib/Algebra/Lie/Weights/RootSystem.lean,Mathlib/Algebra/Module/Equiv/Defs.lean,Mathlib/Algebra/Module/FinitePresentation.lean,Mathlib/Algebra/Module/LinearMap/Defs.lean,Mathlib/Algebra/Module/Presentation/Basic.lean,Mathlib/Algebra/MonoidAlgebra/Defs.lean,Mathlib/Algebra/MonoidAlgebra/ToDirectSum.lean,Mathlib/Algebra/MvPolynomial/Basic.lean,Mathlib/Algebra/MvPolynomial/Equiv.lean,Mathlib/Algebra/MvPolynomial/Eval.lean,Mathlib/Algebra/MvPolynomial/Variables.lean,Mathlib/Algebra/NoZeroSMulDivisors/Defs.lean,Mathlib/Algebra/Order/Antidiag/Pi.lean,Mathlib/Algebra/Order/CauSeq/Completion.lean,Mathlib/Algebra/Order/Field/Power.lean,Mathlib/Algebra/Order/Ring/Unbundled/Rat.lean,Mathlib/Algebra/Polynomial/Bivariate.lean,Mathlib/Algebra/Polynomial/Degree/CardPowDegree.lean,Mathlib/Algebra/Polynomial/HasseDeriv.lean,Mathlib/Algebra/Quaternion.lean,Mathlib/Algebra/Regular/Pi.lean,Mathlib/Algebra/Ring/Basic.lean,Mathlib/Algebra/Ring/CentroidHom.lean,Mathlib/Algebra/Ring/GrindInstances.lean,Mathlib/Algebra/Ring/Int/Defs.lean,Mathlib/Algebra/RingQuot.lean,Mathlib/Algebra/Star/NonUnitalSubalgebra.lean 567 0 [] nobody
325-29049
10 months ago
unknown
0-0
0 seconds
15213 adomani
author:adomani
 dev: add Mathlib.Tactic.Linter.ForallIntro --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict WIP t-linter large-import 608/0 Mathlib.lean,Mathlib/Tactic.lean,Mathlib/Tactic/Linter.lean,Mathlib/Tactic/Linter/ForallIntro.lean,MathlibTest/ForallIntro.lean 5 5 ['adomani', 'github-actions', 'grunweg', 'leanprover-community-bot-assistant'] nobody
321-67421
10 months ago
unknown
0-0
0 seconds
17458 urkud
author:urkud
 refactor(Algebra/Group): make `IsUnit` a typeclass Also change some lemmas to assume `[IsUnit _]` instead of `[Invertible _]`. Motivated by potential non-defeq diamonds in #14986, see also [Zulip](https://leanprover.zulipchat.com/#narrow/stream/116395-maths/topic/Invertible.20and.20data) I no longer plan to merge this PR, but I'm going to cherry-pick some changes to a new PR before closing this one. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-algebra awaiting-zulip
label:t-algebra$
 82/72 Mathlib/Algebra/CharP/Invertible.lean,Mathlib/Algebra/Group/Invertible/Basic.lean,Mathlib/Algebra/Group/Units/Defs.lean,Mathlib/Algebra/GroupWithZero/Invertible.lean,Mathlib/Algebra/GroupWithZero/Units/Basic.lean,Mathlib/Algebra/Polynomial/Degree/Units.lean,Mathlib/Algebra/Polynomial/Splits.lean,Mathlib/Analysis/Convex/Segment.lean,Mathlib/Analysis/Normed/Affine/Isometry.lean,Mathlib/Analysis/Normed/Ring/Units.lean,Mathlib/CategoryTheory/Linear/Basic.lean,Mathlib/FieldTheory/Finite/Basic.lean,Mathlib/FieldTheory/Separable.lean,Mathlib/FieldTheory/SeparableDegree.lean,Mathlib/GroupTheory/Submonoid/Inverses.lean,Mathlib/LinearAlgebra/AffineSpace/AffineEquiv.lean,Mathlib/LinearAlgebra/AffineSpace/Combination.lean,Mathlib/LinearAlgebra/CliffordAlgebra/Contraction.lean,Mathlib/LinearAlgebra/CliffordAlgebra/Inversion.lean,Mathlib/LinearAlgebra/CliffordAlgebra/SpinGroup.lean,Mathlib/LinearAlgebra/Eigenspace/Minpoly.lean,Mathlib/NumberTheory/MulChar/Basic.lean,Mathlib/RingTheory/Localization/NumDen.lean,Mathlib/RingTheory/Polynomial/Content.lean,Mathlib/RingTheory/Polynomial/GaussLemma.lean,Mathlib/RingTheory/Valuation/Basic.lean 26 12 ['MichaelStollBayreuth', 'acmepjz', 'eric-wieser', 'github-actions', 'leanprover-bot', 'leanprover-community-bot-assistant', 'urkud'] nobody
321-65197
10 months ago
593-12840
593 days ago
0-66650
18 hours
22928 javra
author:javra
 feat(CategoryTheory): infrastructure for inclusion morphisms into products in categories with 0-morphisms --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-category-theory 52/14 Mathlib/CategoryTheory/Limits/Shapes/BinaryBiproducts.lean,Mathlib/CategoryTheory/Limits/Shapes/Biproducts.lean,Mathlib/CategoryTheory/Limits/Shapes/ZeroMorphisms.lean 3 2 ['github-actions', 'leanprover-community-bot-assistant'] nobody
321-64691
10 months ago
321-64692
321 days ago
112-51866
112 days
22952 eric-wieser
author:eric-wieser
 refactor: reimplement `RingQuot` in terms of `RingCon.Quotient` --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-algebra
label:t-algebra$
 157/184 Mathlib/Algebra/RingQuot.lean,Mathlib/GroupTheory/Congruence/Basic.lean,Mathlib/RingTheory/Congruence/Basic.lean,Mathlib/RingTheory/Congruence/Defs.lean 4 2 ['github-actions', 'leanprover-community-bot-assistant'] nobody
321-64690
10 months ago
unknown
0-0
0 seconds
24710 chrisflav
author:chrisflav
 chore(Data/Set): `tsum` version of `Set.encard_iUnion_of_finite` for non-finite types As requested here: https://github.com/leanprover-community/mathlib4/pull/23849#discussion_r2081070200 --- - [ ] depends on: #23849 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-data 163/0 Mathlib.lean,Mathlib/Algebra/BigOperators/Finprod.lean,Mathlib/Data/Set/Card/Arithmetic.lean,Mathlib/Data/Set/Card/InfiniteArithmetic.lean,Mathlib/Data/Set/Finite/Lattice.lean,Mathlib/Topology/Algebra/InfiniteSum/Order.lean,Mathlib/Topology/Instances/ENat/Lemmas.lean 7 3 ['github-actions', 'leanprover-community-bot-assistant', 'mathlib4-dependent-issues-bot'] nobody
321-64285
10 months ago
321-64285
321 days ago
1-80465
1 day
24823 eric-wieser
author:eric-wieser
 refactor: add `hom` lemmas for the `MonoidalCategory` structure on `ModuleCat` --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-algebra
label:t-algebra$
 148/164 Mathlib/Algebra/Category/FGModuleCat/Basic.lean,Mathlib/Algebra/Category/ModuleCat/Adjunctions.lean,Mathlib/Algebra/Category/ModuleCat/Monoidal/Basic.lean,Mathlib/Algebra/Category/ModuleCat/Monoidal/Closed.lean,Mathlib/Algebra/Category/ModuleCat/Monoidal/Symmetric.lean,Mathlib/Algebra/Category/ModuleCat/Presheaf/Free.lean,Mathlib/Algebra/Category/ModuleCat/Presheaf/Generator.lean,Mathlib/Algebra/Category/ModuleCat/Presheaf/Monoidal.lean,Mathlib/CategoryTheory/Monoidal/Internal/Module.lean,Mathlib/RepresentationTheory/Coinvariants.lean,Mathlib/RepresentationTheory/Rep.lean 11 21 ['101damnations', 'YaelDillies', 'eric-wieser', 'github-actions', 'joelriou', 'kbuzzard', 'leanprover-community-bot-assistant'] 101damnations
assignee:101damnations
321-64284
10 months ago
321-64284
321 days ago
37-56728
37 days
25071 erdOne
author:erdOne
 feat(EllipticCurve): basic API for singular cubics --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-algebraic-geometry 320/0 Mathlib.lean,Mathlib/AlgebraicGeometry/EllipticCurve/Singular/Basic.lean,Mathlib/AlgebraicGeometry/EllipticCurve/VariableChange.lean 3 35 ['Multramate', 'acmepjz', 'erdOne', 'github-actions', 'leanprover-community-bot-assistant'] nobody
321-64038
10 months ago
321-64039
321 days ago
45-4165
45 days
25197 eric-wieser
author:eric-wieser
 feat: Finset.sum induction for tensor products. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-algebra large-import
label:t-algebra$
 81/0 Mathlib/LinearAlgebra/TensorProduct/Basic.lean 1 2 ['github-actions', 'leanprover-community-bot-assistant'] nobody
321-64036
10 months ago
unknown
0-0
0 seconds
25218 kckennylau
author:kckennylau
 feat(AlgebraicGeometry): Tate normal form of elliptic curves --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-algebraic-geometry awaiting-zulip new-contributor 291/26 Mathlib.lean,Mathlib/AlgebraicGeometry/EllipticCurve/IsomOfJ.lean,Mathlib/AlgebraicGeometry/EllipticCurve/Modular/TateNormalForm.lean,Mathlib/AlgebraicGeometry/EllipticCurve/NormalForms.lean,Mathlib/AlgebraicGeometry/EllipticCurve/VariableChange.lean 5 31 ['MichaelStollBayreuth', 'Multramate', 'acmepjz', 'github-actions', 'grunweg', 'kckennylau', 'leanprover-community-bot-assistant'] nobody
321-64035
10 months ago
354-39152
354 days ago
6-47693
6 days
25247 alreadydone
author:alreadydone
 Projective contraction --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-algebra
label:t-algebra$
 160/31 Mathlib/Data/Finsupp/Defs.lean,Mathlib/LinearAlgebra/Contraction.lean,Mathlib/LinearAlgebra/Pi.lean,Mathlib/RingTheory/Finiteness/Finsupp.lean 4 2 ['github-actions', 'leanprover-community-bot-assistant'] nobody
321-64032
10 months ago
360-1407
360 days ago
0-9
9 seconds
25561 callesonne
author:callesonne
 feat(Category/Grpd): define the bicategory of groupoids --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict awaiting-author t-category-theory 179/25 Mathlib.lean,Mathlib/AlgebraicTopology/FundamentalGroupoid/InducedMaps.lean,Mathlib/CategoryTheory/Bicategory/Functor/Pseudofunctor.lean,Mathlib/CategoryTheory/Bicategory/Functor/Strict.lean,Mathlib/CategoryTheory/Category/Cat.lean,Mathlib/CategoryTheory/Category/Grpd.lean 6 6 ['callesonne', 'github-actions', 'joelriou', 'leanprover-community-bot-assistant', 'robin-carlier'] nobody
321-64020
10 months ago
338-15343
338 days ago
10-55201
10 days
25671 eric-wieser
author:eric-wieser
 refactor: generalize `OreSet` to work for bimodules --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict large-import 243/256 Mathlib/Algebra/Module/LocalizedModule/Basic.lean,Mathlib/AlgebraicGeometry/Modules/Tilde.lean,Mathlib/GroupTheory/OreLocalization/Basic.lean,Mathlib/GroupTheory/OreLocalization/OreSet.lean,Mathlib/RingTheory/OreLocalization/Ring.lean,Mathlib/RingTheory/TensorProduct/Nontrivial.lean 6 2 ['github-actions', 'leanprover-community-bot-assistant'] nobody
321-63891
10 months ago
unknown
0-0
0 seconds
25988 Multramate
author:Multramate
 refactor(AlgebraicGeometry/EllipticCurve/*): replace Fin 3 with products This PR continues the work from #24593. Original PR: https://github.com/leanprover-community/mathlib4/pull/24593 merge-conflict t-algebraic-geometry 1000/1022 Mathlib/AlgebraicGeometry/EllipticCurve/Jacobian/Basic.lean,Mathlib/AlgebraicGeometry/EllipticCurve/Jacobian/Formula.lean,Mathlib/AlgebraicGeometry/EllipticCurve/Jacobian/Point.lean,Mathlib/AlgebraicGeometry/EllipticCurve/Projective/Basic.lean,Mathlib/AlgebraicGeometry/EllipticCurve/Projective/Formula.lean,Mathlib/AlgebraicGeometry/EllipticCurve/Projective/Point.lean 6 3 ['Multramate', 'github-actions', 'leanprover-community-bot-assistant'] nobody
321-63726
10 months ago
321-63726
321 days ago
18-21880
18 days
26002 robin-carlier
author:robin-carlier
 feat(CategoryTheory/Monoidal/Action): action of `Type` on categories with coproducts We show that if a category admits coproducts of size `w`, then `Type w` acts on the left on that category. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict WIP t-category-theory 213/0 Mathlib.lean,Mathlib/CategoryTheory/Monoidal/Action/ChosenTypeCopowers.lean 2 2 ['github-actions', 'leanprover-community-bot-assistant'] nobody
321-63724
10 months ago
unknown
0-0
0 seconds
26090 grunweg
author:grunweg
 chore: make `finiteness` a default tactic Opening for discussion. This PR continues the work from #25119. merge-conflict 423/366 Archive/Wiedijk100Theorems/BallotProblem.lean,Mathlib/Analysis/Analytic/Uniqueness.lean,Mathlib/Analysis/Asymptotics/ExpGrowth.lean,Mathlib/Analysis/Calculus/ContDiff/Basic.lean,Mathlib/Analysis/Convex/Integral.lean,Mathlib/Analysis/Fourier/AddCircle.lean,Mathlib/Analysis/Fourier/AddCircleMulti.lean,Mathlib/Analysis/FunctionalSpaces/SobolevInequality.lean,Mathlib/Analysis/Normed/Field/Basic.lean,Mathlib/Analysis/Normed/Lp/PiLp.lean,Mathlib/Analysis/Normed/Lp/ProdLp.lean,Mathlib/Analysis/Normed/Lp/lpSpace.lean,Mathlib/Analysis/SpecialFunctions/Pow/Continuity.lean,Mathlib/Analysis/SpecialFunctions/Pow/NNReal.lean,Mathlib/Analysis/SpecificLimits/Basic.lean,Mathlib/Data/ENNReal/Basic.lean,Mathlib/Data/ENNReal/Holder.lean,Mathlib/Data/ENNReal/Inv.lean,Mathlib/Data/ENNReal/Operations.lean,Mathlib/Data/ENNReal/Real.lean,Mathlib/Data/EReal/Basic.lean,Mathlib/Data/EReal/Operations.lean,Mathlib/InformationTheory/KullbackLeibler/Basic.lean,Mathlib/MeasureTheory/Covering/Besicovitch.lean,Mathlib/MeasureTheory/Function/AEEqOfIntegral.lean,Mathlib/MeasureTheory/Function/ContinuousMapDense.lean,Mathlib/MeasureTheory/Function/ConvergenceInMeasure.lean,Mathlib/MeasureTheory/Function/Egorov.lean,Mathlib/MeasureTheory/Function/Jacobian.lean,Mathlib/MeasureTheory/Function/L1Space/AEEqFun.lean,Mathlib/MeasureTheory/Function/L2Space.lean,Mathlib/MeasureTheory/Function/LocallyIntegrable.lean,Mathlib/MeasureTheory/Function/LpSeminorm/Basic.lean,Mathlib/MeasureTheory/Function/LpSeminorm/ChebyshevMarkov.lean,Mathlib/MeasureTheory/Function/LpSeminorm/CompareExp.lean,Mathlib/MeasureTheory/Function/LpSeminorm/Defs.lean,Mathlib/MeasureTheory/Function/LpSpace/Basic.lean,Mathlib/MeasureTheory/Function/LpSpace/Complete.lean,Mathlib/MeasureTheory/Function/LpSpace/Indicator.lean,Mathlib/MeasureTheory/Function/SimpleFuncDenseLp.lean,Mathlib/MeasureTheory/Function/UniformIntegrable.lean,Mathlib/MeasureTheory/Integral/Bochner/Basic.lean,Mathlib/MeasureTheory/Integral/MeanInequalities.lean,Mathlib/MeasureTheory/Integral/Prod.lean,Mathlib/MeasureTheory/Integral/RieszMarkovKakutani/Real.lean,Mathlib/MeasureTheory/Measure/Decomposition/IntegralRNDeriv.lean,Mathlib/MeasureTheory/Measure/Decomposition/Lebesgue.lean,Mathlib/MeasureTheory/Measure/Haar/Basic.lean,Mathlib/MeasureTheory/Measure/Haar/DistribChar.lean,Mathlib/MeasureTheory/Measure/Haar/Quotient.lean,Mathlib/MeasureTheory/Measure/Haar/Unique.lean,Mathlib/MeasureTheory/Measure/Lebesgue/EqHaar.lean,Mathlib/MeasureTheory/Measure/LevyProkhorovMetric.lean,Mathlib/MeasureTheory/Measure/Real.lean,Mathlib/MeasureTheory/Measure/Restrict.lean,Mathlib/MeasureTheory/Measure/Tilted.lean,Mathlib/MeasureTheory/Measure/Typeclasses/Finite.lean,Mathlib/NumberTheory/NumberField/Discriminant/Basic.lean,Mathlib/Probability/BorelCantelli.lean,Mathlib/Probability/Independence/Conditional.lean,Mathlib/Probability/Integration.lean,Mathlib/Probability/Kernel/Composition/IntegralCompProd.lean,Mathlib/Probability/Kernel/Disintegration/CondCDF.lean,Mathlib/Probability/Kernel/Disintegration/Density.lean,Mathlib/Probability/Martingale/Convergence.lean,Mathlib/Probability/Martingale/OptionalStopping.lean,Mathlib/Probability/Moments/CovarianceBilin.lean,Mathlib/Probability/Moments/Tilted.lean,Mathlib/Probability/Moments/Variance.lean,Mathlib/Probability/UniformOn.lean,Mathlib/Topology/MetricSpace/Bounded.lean,Mathlib/Topology/MetricSpace/Perfect.lean,scripts/noshake.json 73 3 ['github-actions', 'grunweg', 'leanprover-community-bot-assistant'] nobody
321-61736
10 months ago
321-61737
321 days ago
16-56825
16 days
26395 winstonyin
author:winstonyin
 feat: $C^1$ vector fields on compact manifolds define global flows This PR continues the work from #22254. Original PR: https://github.com/leanprover-community/mathlib4/pull/22254 Any $C^1$ vector field on a compact boundaryless manifold `M` defines a unique global flow `ℝ → M → M`. - [ ] depends on: #26394 --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) WIP t-differential-geometry blocked-by-other-PR merge-conflict 841/406 Mathlib/Analysis/ODE/PicardLindelof.lean,Mathlib/Geometry/Manifold/IntegralCurve/Compact.lean,Mathlib/Geometry/Manifold/IntegralCurve/ExistUnique.lean,Mathlib/Order/Filter/Prod.lean 7 4 ['github-actions', 'leanprover-community-bot-assistant', 'mathlib4-dependent-issues-bot', 'winstonyin'] nobody
321-61587
10 months ago
331-59034
331 days ago
0-52
52 seconds
26465 joelriou
author:joelriou
 feat(Algebra/Module): presentation of the `PiTensorProduct` Given a presentation of a finite number of `R`-modules `M i`, we obtain a presentation of the module `⨂[R] i, M i`. --- - [ ] depends on: #26464 This PR continues the work from #18527. Original PR: https://github.com/leanprover-community/mathlib4/pull/18527 merge-conflict file-removed t-algebra blocked-by-other-PR
label:t-algebra$
 525/4 Mathlib.lean,Mathlib/Algebra/Module/Presentation/PiTensor.lean,Mathlib/Analysis/NormedSpace/PiTensorProduct/ProjectiveSeminorm.lean,Mathlib/Data/Set/ComplSingletonLift.lean,Mathlib/LinearAlgebra/PiTensorProduct/Basic.lean,Mathlib/LinearAlgebra/PiTensorProduct/Finite.lean,Mathlib/LinearAlgebra/PiTensorProduct/Generators.lean,Mathlib/LinearAlgebra/TensorPower/Basic.lean,Mathlib/RingTheory/PiTensorProduct.lean,Mathlib/SetTheory/Cardinal/Finite.lean 10 4 ['github-actions', 'joelriou', 'leanprover-community-bot-assistant', 'mathlib4-dependent-issues-bot'] nobody
321-61457
10 months ago
329-49024
329 days ago
0-1271
21 minutes
26467 joelriou
author:joelriou
 feat(LinearAlgebra): the tensor product of a finite family of free modules is free --- - [ ] depends on: #26464 - [ ] depends on: #26465 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) WIP t-algebra blocked-by-other-PR merge-conflict file-removed
label:t-algebra$
 607/7 Mathlib.lean,Mathlib/Algebra/Module/Presentation/Free.lean,Mathlib/Algebra/Module/Presentation/PiTensor.lean,Mathlib/Analysis/NormedSpace/PiTensorProduct/ProjectiveSeminorm.lean,Mathlib/Data/Set/ComplSingletonLift.lean,Mathlib/LinearAlgebra/PiTensorProduct/Basic.lean,Mathlib/LinearAlgebra/PiTensorProduct/Basis.lean,Mathlib/LinearAlgebra/PiTensorProduct/Finite.lean,Mathlib/LinearAlgebra/PiTensorProduct/Generators.lean,Mathlib/LinearAlgebra/TensorPower/Basic.lean,Mathlib/RingTheory/PiTensorProduct.lean,Mathlib/SetTheory/Cardinal/Finite.lean 12 3 ['github-actions', 'leanprover-community-bot-assistant', 'mathlib4-dependent-issues-bot'] nobody
321-61455
10 months ago
329-44883
329 days ago
0-2
2 seconds
20784 eric-wieser
author:eric-wieser
 fix: prevent `exact?` recursing forever on `n = 55` Test case thanks to @llllvvuu: ```lean import Mathlib.SetTheory.Ordinal.Basic theorem natCast_inj {m n : ℕ} : (m : Ordinal) = n ↔ m = n := sorry example (n : Nat) : n = 55 := by exact? ``` This is surely a workaround for some unreported lean bug. The bug still exists for `n = 71` or higher, so we can still track down the bug after merging this patch. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-set-theory 22/3 Mathlib/SetTheory/Ordinal/Basic.lean,MathlibTest/LibrarySearchRecDepth.lean 2 15 ['Command-Master', 'eric-wieser', 'github-actions', 'kbuzzard', 'kim-em', 'leanprover-bot', 'leanprover-community-bot-assistant', 'mattrobball'] nobody
321-32720
10 months ago
459-5082
459 days ago
32-73698
32 days
26647 b-mehta
author:b-mehta
 feat(Data/Sym/Sym2): lift commutative operations to sym2 While we have `Sym2.lift`, it's often useful to lift operations which are known to be commutative to the typeclass system. Indeed, the existing `Sym2.mul` witnesses this already. Thus, this PR can also be seen as generalising `Sym2.mul`. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict WIP t-data 48/28 Mathlib/Data/Sym/Sym2.lean,Mathlib/Data/Sym/Sym2/Finsupp.lean,Mathlib/LinearAlgebra/QuadraticForm/Basic.lean,Mathlib/LinearAlgebra/QuadraticForm/Basis.lean 4 12 ['b-mehta', 'eric-wieser', 'github-actions', 'leanprover-community-bot-assistant'] nobody
319-67316
10 months ago
320-153
319 days ago
3-71897
3 days
26878 adomani
author:adomani
 feat: declaration diff script in Lean Although, it is still text-based, the parsing of the output of `git diff` is now done in Lean. The new script already performed better than the old one in a couple of situations: * #26877 See [this comment](https://github.com/leanprover-community/mathlib4/pull/26847#issuecomment-3045308885) * #26849 See [this comment](https://github.com/leanprover-community/mathlib4/pull/26849#issuecomment-3045092965) --- This is still work in progress: the parsing should be more or less done, but I have not yet hooked this into the action workflow. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) 497/0 scripts/DeclarationDiff_text_based.lean 1 4 ['adomani', 'bryangingechen', 'github-actions'] bryangingechen
assignee:bryangingechen
318-47247
10 months ago
319-10798
319 days ago
0-9
9 seconds
26067 mapehe
author:mapehe
 feat(Topology/StoneCech): exists_continuous_surjection_from_StoneCech_to_dense_range This lemma formalises the following version of the maximality property of the Stone–Čech compactification: If `f : α → β` is a continuous map from a topological space `α` to a Hausdorff space `β` with dense range, then there exists a continuous surjection from `StoneCech α` to `β` extending `f`. In particular, `StoneCech α` is the “largest” compact Hausdorff space into which `α` densely embeds, in the sense that any other such space is a continuous image of it. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-topology 18/0 Mathlib/Topology/StoneCech.lean 1 2 ['github-actions', 'leanprover-community-bot-assistant'] nobody
318-45104
10 months ago
318-45104
318 days ago
20-8582
20 days
25999 bjoernkjoshanssen
author:bjoernkjoshanssen
 feat(Topology/Compactification): projective line over ℝ is homeomorphic to the one-point compactification of ℝ This PR continues the work from #18306. Original PR: https://github.com/leanprover-community/mathlib4/pull/18306 merge-conflict t-topology 920/0 Mathlib.lean,Mathlib/Topology/Compactification/OnePointHomeomorph.lean,Mathlib/Topology/Compactification/OnePointRealLemmas.lean 3 3 ['bjoernkjoshanssen', 'github-actions', 'leanprover-community-bot-assistant'] nobody
316-51178
10 months ago
318-45106
318 days ago
21-20473
21 days
26994 Paul-Lez
author:Paul-Lez
 feat(Topology/MetricSpace/Pseudo/Defs): add easy lemma about opens in topological spaces Split from #26992 --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) awaiting-author t-topology easy 9/0 Mathlib/Topology/MetricSpace/Pseudo/Defs.lean 1 4 ['Paul-Lez', 'github-actions', 'grunweg'] nobody
315-25904
10 months ago
315-27326
315 days ago
0-11233
3 hours
21039 eric-wieser
author:eric-wieser
 hack: override `instance` to insert `fast_instance%` --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) please-adopt merge-conflict t-meta 40/4 Mathlib/Algebra/Equiv/TransferInstance.lean,Mathlib/RingTheory/Ideal/Maximal.lean,Mathlib/Tactic/FastInstance.lean,Mathlib/Topology/FiberBundle/Basic.lean 4 2 ['github-actions', 'leanprover-community-bot-assistant'] nobody
315-7806
10 months ago
unknown
0-0
0 seconds
26911 JovanGerb
author:JovanGerb
 chore: fix naming of `mono` and `monotone` The naming convention says: "We use `_mono` for `a ≤ b → f a ≤ f b` and `_anti` for `a ≤ b → f b ≤ f a`, so we also use `_monotone` for `Monotone f`, `_antitone` for `Antitone f`, `_strictMono` for `StrictMono f`, `_strictAnti` for `StrictAnti f`, etc..." This PR swaps `mono`/`anti` and `monotone`/`antitone` where required so that `monotone` refers to `Monotone`, while `mono` refers to a lemma that might be tagged with `@[gcongr]` This PR does not address - `monotone_right`/`mono_right` vs `right_monotone`/`right_mono` - `monotone_arcsin` vs `arcsin_monotone` edit: TODO: `ideal_mono` and friends --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) delegated merge-conflict 238/171 Archive/Imo/Imo1962Q1.lean,Archive/Wiedijk100Theorems/AbelRuffini.lean,Archive/Wiedijk100Theorems/SumOfPrimeReciprocalsDiverges.lean,Counterexamples/DiscreteTopologyNonDiscreteUniformity.lean,Mathlib/Algebra/Group/Pointwise/Finset/Basic.lean,Mathlib/Algebra/Group/Pointwise/Set/Basic.lean,Mathlib/Algebra/Order/AddGroupWithTop.lean,Mathlib/Algebra/Order/Field/Basic.lean,Mathlib/Algebra/Order/Group/Basic.lean,Mathlib/Algebra/Order/Group/Finset.lean,Mathlib/Algebra/Order/Group/PosPart.lean,Mathlib/Algebra/Order/GroupWithZero/Unbundled/Basic.lean,Mathlib/Algebra/Order/Monoid/Unbundled/Basic.lean,Mathlib/Algebra/Order/Monoid/Unbundled/Pow.lean,Mathlib/Algebra/Order/ToIntervalMod.lean,Mathlib/Algebra/Polynomial/Degree/CardPowDegree.lean,Mathlib/AlgebraicGeometry/IdealSheaf/Basic.lean,Mathlib/Analysis/Analytic/Composition.lean,Mathlib/Analysis/Convex/Deriv.lean,Mathlib/Analysis/Normed/Order/UpperLower.lean,Mathlib/Analysis/Normed/Unbundled/SeminormFromConst.lean,Mathlib/Analysis/PSeries.lean,Mathlib/Analysis/Real/Pi/Bounds.lean,Mathlib/Analysis/SpecialFunctions/Pow/Continuity.lean,Mathlib/Analysis/SpecialFunctions/Trigonometric/Basic.lean,Mathlib/Analysis/SpecificLimits/Basic.lean,Mathlib/Analysis/SpecificLimits/FloorPow.lean,Mathlib/Combinatorics/SetFamily/Kleitman.lean,Mathlib/Combinatorics/SimpleGraph/Girth.lean,Mathlib/Combinatorics/SimpleGraph/Regularity/Lemma.lean,Mathlib/Data/ENNReal/Inv.lean,Mathlib/Data/ENNReal/Operations.lean,Mathlib/Data/ENat/Pow.lean,Mathlib/Data/Nat/Choose/Factorization.lean,Mathlib/Dynamics/Circle/RotationNumber/TranslationNumber.lean,Mathlib/LinearAlgebra/AffineSpace/AffineMap.lean,Mathlib/MeasureTheory/Constructions/BorelSpace/Basic.lean,Mathlib/MeasureTheory/Constructions/Polish/Basic.lean,Mathlib/MeasureTheory/MeasurableSpace/MeasurablyGenerated.lean,Mathlib/MeasureTheory/OuterMeasure/Operations.lean,Mathlib/NumberTheory/Bertrand.lean,Mathlib/NumberTheory/FermatPsp.lean,Mathlib/NumberTheory/Height/Basic.lean,Mathlib/NumberTheory/ModularForms/Bounds.lean,Mathlib/NumberTheory/Padics/Hensel.lean,Mathlib/NumberTheory/Padics/WithVal.lean,Mathlib/Order/Concept.lean,Mathlib/Order/Filter/AtTopBot/Archimedean.lean,Mathlib/Order/Filter/AtTopBot/Defs.lean,Mathlib/Order/Fin/Basic.lean,Mathlib/Order/Heyting/Basic.lean,Mathlib/Order/Heyting/Boundary.lean,Mathlib/Order/Heyting/Regular.lean,Mathlib/Order/Hom/Set.lean,Mathlib/Order/Interval/Set/Fin.lean,Mathlib/Order/KrullDimension.lean,Mathlib/Order/UpperLower/Closure.lean,Mathlib/Probability/StrongLaw.lean,Mathlib/RingTheory/DedekindDomain/Ideal/Basic.lean,Mathlib/RingTheory/FractionalIdeal/Basic.lean,Mathlib/RingTheory/WittVector/Basic.lean,Mathlib/Topology/EMetricSpace/Lipschitz.lean,Mathlib/Topology/MetricSpace/Antilipschitz.lean 59 11 ['JovanGerb', 'bryangingechen', 'github-actions', 'leanprover-community-bot-assistant', 'linesthatinterlace', 'mathlib-bors', 'mathlib-merge-conflicts'] bryangingechen
assignee:bryangingechen
314-72911
10 months ago
315-27510
315 days ago
2-55296
2 days
25611 erdOne
author:erdOne
 chore(RingTheory): add `Algebra (FractionRing R) (FractionRing S)` Co-authored-by: Yakov Pechersky --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-algebra
label:t-algebra$
 152/108 Mathlib.lean,Mathlib/Algebra/Algebra/NonZeroDivisors.lean,Mathlib/NumberTheory/RamificationInertia/Galois.lean,Mathlib/RingTheory/DedekindDomain/Different.lean,Mathlib/RingTheory/DedekindDomain/IntegralClosure.lean,Mathlib/RingTheory/Ideal/Norm/RelNorm.lean,Mathlib/RingTheory/IntegralClosure/IntegralRestrict.lean,Mathlib/RingTheory/Localization/FractionRing.lean,Mathlib/RingTheory/Localization/FractionRingAlgebra.lean,Mathlib/RingTheory/Localization/Integral.lean 10 20 ['alreadydone', 'erdOne', 'eric-wieser', 'github-actions', 'leanprover-community-bot-assistant', 'pechersky'] nobody
311-33922
10 months ago
345-29608
345 days ago
2-26945
2 days
18230 digama0
author:digama0
 feat(Tactic/ScopedNS): extend `scoped[NS]` to more commands refactor `ScopedNS` to remove error prone repetitiveness and extend it to other commands such as `syntax`, `macro`, `elab`, etc. Co-authored-by: Jon Eugster --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) awaiting-author t-meta 201/26 Mathlib/Tactic/ScopedNS.lean,MathlibTest/scopedNS.lean 2 7 ['adomani', 'digama0', 'eric-wieser', 'github-actions', 'joneugster', 'kbuzzard'] nobody
309-40383
10 months ago
452-39888
452 days ago
41-32344
41 days
27330 BoltonBailey
author:BoltonBailey
 feat(Tactic/Linter): add TacticMs for natural subtraction and division This is a (pair of) short tactic scripts I wrote for Project Numina while vetting formal formal statements (thanks to [this guide](https://github.com/mirefek/lean-tactic-programming-guide) for the primer). The scripts check for the presence of natural subtraction and natural division, which can often lead to mistakes. Of course, Mathlib allows natural subtraction freely, so it's not obvious this could be made useful to Mathlib itself. Still, maybe it's of use to some other project, so I'll leave it here. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-linter 66/0 Mathlib/Tactic/Linter/TruncatedNat.lean 1 2 ['BoltonBailey', 'eric-wieser', 'github-actions'] nobody
304-70908
10 months ago
unknown
0-0
0 seconds
25284 alreadydone
author:alreadydone
 feat(LinearAlgebra/Contraction): bijectivity of `dualTensorHom` + generalize to CommSemiring --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict awaiting-author t-algebra
label:t-algebra$
 167/32 Mathlib/Data/Finsupp/Defs.lean,Mathlib/LinearAlgebra/Contraction.lean,Mathlib/LinearAlgebra/Pi.lean,Mathlib/LinearAlgebra/Trace.lean,Mathlib/RingTheory/Finiteness/Finsupp.lean 5 16 ['alreadydone', 'eric-wieser', 'github-actions', 'kckennylau', 'leanprover-bot', 'leanprover-community-bot-assistant'] nobody
303-84862
9 months ago
310-50629
310 days ago
45-36570
45 days
22749 joelriou
author:joelriou
 feat(CategoryTheory/Abelian): the Gabriel-Popescu theorem as a localization with respect to a Serre class This PR introduces a structure `GabrielPopescuPackage C` which contains the information to say that the abelian category `C` is a localization of a category of modules with respect to a suitable Serre class. --- - [x] depends on: #26033 - [ ] depends on: #26663 - [x] depends on: #22733 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict WIP t-category-theory 202/6 Mathlib.lean,Mathlib/CategoryTheory/Abelian/GrothendieckCategory/ModuleEmbedding/GabrielPopescu.lean,Mathlib/CategoryTheory/Abelian/SerreClass/Bousfield.lean,Mathlib/CategoryTheory/Abelian/SerreClass/MorphismProperty.lean,Mathlib/CategoryTheory/ObjectProperty/ContainsZero.lean 5 3 ['github-actions', 'leanprover-community-bot-assistant', 'mathlib4-dependent-issues-bot'] nobody
303-41748
9 months ago
323-27549
323 days ago
0-10614
2 hours
26784 eric-wieser
author:eric-wieser
 chore: remove suppress_compilation Still not exhaustive. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict 0/37 Mathlib/Algebra/Category/CoalgCat/ComonEquivalence.lean,Mathlib/Algebra/Category/ModuleCat/ChangeOfRings.lean,Mathlib/Algebra/Category/Ring/Constructions.lean,Mathlib/Algebra/Colimit/DirectLimit.lean,Mathlib/Algebra/Colimit/Module.lean,Mathlib/Algebra/Colimit/Ring.lean,Mathlib/AlgebraicGeometry/Limits.lean,Mathlib/Analysis/Normed/Algebra/Unitization.lean,Mathlib/Analysis/NormedSpace/Multilinear/Basic.lean,Mathlib/Analysis/NormedSpace/Multilinear/Curry.lean,Mathlib/Analysis/NormedSpace/OperatorNorm/Basic.lean,Mathlib/Analysis/NormedSpace/OperatorNorm/Bilinear.lean,Mathlib/Analysis/NormedSpace/OperatorNorm/Completeness.lean,Mathlib/Analysis/NormedSpace/OperatorNorm/Mul.lean,Mathlib/Analysis/NormedSpace/OperatorNorm/NNNorm.lean,Mathlib/Analysis/NormedSpace/OperatorNorm/NormedSpace.lean,Mathlib/CategoryTheory/Abelian/Projective/Resolution.lean,Mathlib/CategoryTheory/Monoidal/Internal/Module.lean 18 2 ['github-actions', 'leanprover-community-bot-assistant'] nobody
303-14009
9 months ago
unknown
0-0
0 seconds
26987 joelriou
author:joelriou
 chore: deprecating module LinearAlgebra.PiTensorProduct --- - [ ] depends on: #26464 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict WIP t-algebra blocked-by-other-PR
label:t-algebra$
 1209/934 Mathlib.lean,Mathlib/Analysis/NormedSpace/PiTensorProduct/ProjectiveSeminorm.lean,Mathlib/Data/SubtypeNeLift.lean,Mathlib/LinearAlgebra/PiTensorProduct.lean,Mathlib/LinearAlgebra/PiTensorProduct/Basic.lean,Mathlib/LinearAlgebra/PiTensorProduct/Finite.lean,Mathlib/LinearAlgebra/PiTensorProduct/Generators.lean,Mathlib/LinearAlgebra/TensorPower/Basic.lean,Mathlib/RingTheory/PiTensorProduct.lean,Mathlib/SetTheory/Cardinal/Finite.lean 10 3 ['github-actions', 'leanprover-community-bot-assistant', 'mathlib4-dependent-issues-bot'] nobody
302-42761
9 months ago
315-44527
315 days ago
0-2
2 seconds
27435 callesonne
author:callesonne
 feat(Normed/Algebra/Logarithm): add FormalMultilinearSeries of logarithm around `1` This PR adds the `FormalMultilinearSeries` corresponding to `log` around `1` (or rather, corresponding to `log(1 + x)`. For now, this PR just adds the definition, and copies over as many (easy) results as possible from the corresponding exponential file. In a follow up PR, we will add a criterion for when the logarithm converges on the unit disk (based on the growth of the inverse norms of naturals in the given algebra), and show that this holds for any Q_p algebra. This work has been done as part of the workshop "Formalizing Class Field Theory" in Oxford. Since much of this is copy-pasting the Exponential file, I have kept Anatole Dedecker and Eric Wieser as coauthors. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) WIP t-analysis 311/0 Mathlib/Analysis/Normed/Algebra/Logarithm.lean 1 1 ['github-actions'] nobody
302-21616
9 months ago
302-21954
302 days ago
0-29
29 seconds
24668 robertmaxton42
author:robertmaxton42
 feat(LinearAlgebra): add inductive principle for the free product of algebras * Add `FreeProduct.inductionOn` and `.asPowers.inductionOn`. - [ ] depends on: #24532 --- * `simp↓` on `empty_rel'_bot`: the LHS is indeed not in simp-normal form, but `simp` can't solve the full lemma (if only because `Function.onFun` isn't marked `@[simp]`) and the actual simp-normal form of `rel'` isn't terribly useful for humans. Since I do expect users to type `rel' R A` by hand, I claim this use of `simp↓` is justified. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-algebra blocked-by-other-PR
label:t-algebra$
 205/9 Mathlib/LinearAlgebra/FreeProduct/Basic.lean 1 3 ['github-actions', 'leanprover-community-bot-assistant', 'mathlib4-dependent-issues-bot'] nobody
300-72330
9 months ago
379-84539
379 days ago
0-229
3 minutes
13973 digama0
author:digama0
 feat: lake exe refactor, initial framework This is the initial framework code for `lake exe refactor`. To use it, you add your refactoring to `Refactor/Main.lean` (note, you have to actually write some metaprogramming code here for the refactoring itself), and the harness will run it on specified files and apply the generated edits. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict awaiting-author t-meta 139/0 Refactor/Main.lean,lakefile.lean 2 11 ['adomani', 'digama0', 'eric-wieser', 'github-actions', 'joneugster', 'leanprover-community-bot-assistant', 'mattrobball'] nobody
297-25921
9 months ago
646-29374
646 days ago
6-30547
6 days
12181 adomani
author:adomani
 lint also `let` vs `have` This PR is symmetrical to #12157: here we lint for non-`Type`-valued `let`s. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-linter 797/544 Archive/Imo/Imo1962Q1.lean,Archive/Wiedijk100Theorems/CubingACube.lean,Archive/Wiedijk100Theorems/FriendshipGraphs.lean,Mathlib.lean,Mathlib/Algebra/Algebra/Tower.lean,Mathlib/Algebra/BigOperators/Basic.lean,Mathlib/Algebra/DirectLimit.lean,Mathlib/Algebra/Group/UniqueProds.lean,Mathlib/Algebra/Homology/HomologicalComplexBiprod.lean,Mathlib/Algebra/Homology/HomologySequence.lean,Mathlib/Algebra/Homology/HomotopyCategory/Pretriangulated.lean,Mathlib/Algebra/Homology/Localization.lean,Mathlib/Algebra/Homology/ShortComplex/Abelian.lean,Mathlib/Algebra/Homology/ShortComplex/ConcreteCategory.lean,Mathlib/Algebra/Homology/ShortComplex/Exact.lean,Mathlib/Algebra/Homology/ShortComplex/ExactFunctor.lean,Mathlib/Algebra/Homology/ShortComplex/Homology.lean,Mathlib/Algebra/Homology/ShortComplex/LeftHomology.lean,Mathlib/Algebra/Homology/ShortComplex/Linear.lean,Mathlib/Algebra/Homology/ShortComplex/Preadditive.lean,Mathlib/Algebra/Homology/ShortComplex/PreservesHomology.lean,Mathlib/Algebra/Homology/ShortComplex/QuasiIso.lean,Mathlib/Algebra/Homology/ShortComplex/RightHomology.lean,Mathlib/Algebra/Lie/Engel.lean,Mathlib/Algebra/Lie/Killing.lean,Mathlib/Algebra/Module/PID.lean,Mathlib/Algebra/Module/Submodule/Localization.lean,Mathlib/Algebra/Module/Zlattice.lean,Mathlib/Algebra/MonoidAlgebra/Grading.lean,Mathlib/Algebra/MvPolynomial/Equiv.lean,Mathlib/Algebra/Order/CauSeq/Basic.lean,Mathlib/Algebra/Polynomial/FieldDivision.lean,Mathlib/Algebra/Polynomial/RingDivision.lean,Mathlib/AlgebraicGeometry/Morphisms/QuasiCompact.lean,Mathlib/AlgebraicGeometry/Morphisms/QuasiSeparated.lean,Mathlib/AlgebraicGeometry/ProjectiveSpectrum/Scheme.lean,Mathlib/AlgebraicGeometry/Pullbacks.lean,Mathlib/AlgebraicGeometry/StructureSheaf.lean,Mathlib/AlgebraicTopology/DoldKan/Homotopies.lean,Mathlib/Analysis/Calculus/ContDiff/Basic.lean,Mathlib/Analysis/Calculus/ContDiff/Bounds.lean,Mathlib/Analysis/Calculus/FDeriv/Comp.lean,Mathlib/Analysis/Calculus/Rademacher.lean,Mathlib/Analysis/Complex/Tietze.lean,Mathlib/Analysis/Convex/Between.lean,Mathlib/Analysis/Convolution.lean,Mathlib/Analysis/Fourier/RiemannLebesgueLemma.lean,Mathlib/Analysis/InnerProductSpace/GramSchmidtOrtho.lean,Mathlib/Analysis/InnerProductSpace/PiL2.lean,Mathlib/Analysis/InnerProductSpace/Rayleigh.lean,Mathlib/Analysis/NormedSpace/ContinuousAffineMap.lean,Mathlib/Analysis/NormedSpace/OperatorNorm/Completeness.lean,Mathlib/Analysis/NormedSpace/Spectrum.lean,Mathlib/Analysis/SpecialFunctions/Integrals.lean,Mathlib/CategoryTheory/Abelian/Basic.lean,Mathlib/CategoryTheory/Abelian/Exact.lean,Mathlib/CategoryTheory/Abelian/Pseudoelements.lean,Mathlib/CategoryTheory/Abelian/Transfer.lean,Mathlib/CategoryTheory/Adhesive.lean,Mathlib/CategoryTheory/Closed/Cartesian.lean,Mathlib/CategoryTheory/Closed/Monoidal.lean,Mathlib/CategoryTheory/Comma/Arrow.lean,Mathlib/CategoryTheory/EffectiveEpi/Extensive.lean,Mathlib/CategoryTheory/Extensive.lean,Mathlib/CategoryTheory/Functor/EpiMono.lean,Mathlib/CategoryTheory/Functor/KanExtension/Basic.lean,Mathlib/CategoryTheory/Galois/Basic.lean,Mathlib/CategoryTheory/Galois/Decomposition.lean,Mathlib/CategoryTheory/Galois/Examples.lean,Mathlib/CategoryTheory/GradedObject/Trifunctor.lean,Mathlib/CategoryTheory/IsConnected.lean,Mathlib/CategoryTheory/Limits/ConcreteCategory.lean,Mathlib/CategoryTheory/Limits/Constructions/EpiMono.lean,Mathlib/CategoryTheory/Limits/Constructions/WeaklyInitial.lean,Mathlib/CategoryTheory/Limits/FilteredColimitCommutesFiniteLimit.lean,Mathlib/CategoryTheory/Limits/Final.lean,Mathlib/CategoryTheory/Limits/FintypeCat.lean,Mathlib/CategoryTheory/Limits/Fubini.lean,Mathlib/CategoryTheory/Limits/IsLimit.lean,Mathlib/CategoryTheory/Limits/Preserves/Basic.lean,Mathlib/CategoryTheory/Limits/Shapes/FiniteLimits.lean,Mathlib/CategoryTheory/Limits/VanKampen.lean,Mathlib/CategoryTheory/Localization/LocalizerMorphism.lean,Mathlib/CategoryTheory/Localization/Pi.lean,Mathlib/CategoryTheory/Localization/Resolution.lean,Mathlib/CategoryTheory/Monad/Monadicity.lean,Mathlib/CategoryTheory/PUnit.lean,Mathlib/CategoryTheory/Sites/Coherent/CoherentSheaves.lean,Mathlib/CategoryTheory/Sites/Coherent/RegularSheaves.lean,Mathlib/CategoryTheory/Sites/Coverage.lean,Mathlib/CategoryTheory/Sites/LeftExact.lean,Mathlib/CategoryTheory/Sites/Preserves.lean,Mathlib/CategoryTheory/Sites/Pullback.lean,Mathlib/CategoryTheory/Sites/Sheaf.lean,Mathlib/CategoryTheory/Triangulated/Pretriangulated.lean,Mathlib/Combinatorics/Colex.lean,Mathlib/Combinatorics/SetFamily/Kleitman.lean,Mathlib/Combinatorics/SimpleGraph/Clique.lean,Mathlib/Combinatorics/SimpleGraph/Coloring.lean,Mathlib/Combinatorics/SimpleGraph/Connectivity.lean 271 0 [] nobody
295-36237
9 months ago
766-45171
766 days ago
0-8
8 seconds
10190 jstoobysmith
author:jstoobysmith
 feat(AlgebraicTopology): add Augmented Simplex Category - Added the definition of the category FinLinOrd of finite linear ordered sets. - Added the definition of the augmented simplex category `AugmentedSimplexCategory`, and showed it is the Skeleton of FinLinOrd. - Showed that the category of augmented simplicial objects defined as a comma category is equivalent to the category of functors from `AugmentedSimplexCategory^\op` --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebraic-topology WIP t-category-theory new-contributor merge-conflict 720/0 Mathlib.lean,Mathlib/AlgebraicTopology/AugmentedSimplexCategory.lean,Mathlib/AlgebraicTopology/SimplicialObject.lean,Mathlib/Order/Category/FinLinOrd.lean 4 5 ['TwoFX', 'YaelDillies', 'joelriou', 'jstoobysmith'] nobody
295-36175
9 months ago
832-29101
832 days ago
7-63253
7 days
10084 alreadydone
author:alreadydone
 draft for Van Kampen The part about the homotopy lifting property for covering maps has been extracted to #22649 --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict WIP t-algebraic-topology 91/24 Mathlib/AlgebraicTopology/FundamentalGroupoid/Basic.lean,Mathlib/AlgebraicTopology/FundamentalGroupoid/VanKampen.lean 2 1 ['leanprover-community-bot-assistant'] nobody
295-36084
9 months ago
unknown
0-0
0 seconds
25914 eric-wieser
author:eric-wieser
 feat: add an ext lemma for the opposite category This powers up `aesop_cat`. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict awaiting-author t-category-theory awaiting-CI 18/56 Mathlib/AlgebraicTopology/SimplicialObject/Basic.lean,Mathlib/CategoryTheory/Abelian/Opposite.lean,Mathlib/CategoryTheory/Category/RelCat.lean,Mathlib/CategoryTheory/GuitartExact/Opposite.lean,Mathlib/CategoryTheory/Limits/Opposites.lean,Mathlib/CategoryTheory/Limits/Shapes/Products.lean,Mathlib/CategoryTheory/Opposites.lean,Mathlib/CategoryTheory/Triangulated/Opposite/Functor.lean,Mathlib/Combinatorics/Quiver/Basic.lean 9 7 ['eric-wieser', 'github-actions', 'grunweg', 'leanprover-community-bot-assistant', 'robin-carlier'] nobody
295-33818
9 months ago
341-23234
341 days ago
0-523
8 minutes
20208 js2357
author:js2357
 feat: Define the localization of a fractional ideal at a prime ideal Define the localization of a fractional ideal at a prime ideal, and prove some basic properties. --- Alternate version of #14237 generalized to use `IsLocalization` and `IsFractionRing` rather than `Localization.AtPrime` and `FractionRing` [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict WIP t-algebra
label:t-algebra$
 248/0 Mathlib.lean,Mathlib/RingTheory/FractionalIdeal/LocalizedAtPrime.lean 2 2 ['github-actions', 'leanprover-community-bot-assistant'] nobody
295-19061
9 months ago
515-162
514 days ago
0-21
21 seconds
24260 plp127
author:plp127
 feat(Topology): add API for Hereditarily Lindelof spaces Copies the stuff about Lindelof spaces to Hereditarily Lindelof spaces. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict awaiting-author t-topology 222/42 Mathlib/Topology/Compactness/Lindelof.lean 1 15 ['github-actions', 'grunweg', 'mathlib4-merge-conflict-bot', 'urkud'] urkud
assignee:urkud
294-75033
9 months ago
366-35673
366 days ago
29-42365
29 days
27181 ADedecker
author:ADedecker
 chore: more conceptual definition of `ValuativeRel.ValueGroupWithZero` --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-algebra large-import
label:t-algebra$
 685/467 Mathlib.lean,Mathlib/Data/Quot.lean,Mathlib/Data/Setoid/Basic.lean,Mathlib/GroupTheory/Congruence/Defs.lean,Mathlib/GroupTheory/Congruence/GroupWithZero.lean,Mathlib/RingTheory/OreLocalization/Basic.lean,Mathlib/RingTheory/OreLocalization/NonZeroDivisors.lean,Mathlib/RingTheory/OreLocalization/Ring.lean,Mathlib/RingTheory/Valuation/ValuativeRel.lean 9 3 ['github-actions', 'leanprover-community-bot-assistant', 'mathlib4-merge-conflict-bot'] nobody
294-75022
9 months ago
unknown
0-0
0 seconds
27813 javra
author:javra
 feat: IMO 2025 Q1 --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) IMO WIP 882/0 Archive/Imo/Imo2025Q1.lean 1 1 ['github-actions'] nobody
294-37043
9 months ago
294-38241
294 days ago
0-14
14 seconds
27608 RemyDegenne
author:RemyDegenne
 feat(MeasureTheory): typeclasses for measures with finite moments WIP because it seems useful for #26291 but I want to investigate more. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict WIP t-measure-probability 97/17 Mathlib.lean,Mathlib/MeasureTheory/Measure/Typeclasses/FiniteMoments.lean,Mathlib/Probability/Moments/CovarianceBilin.lean 3 2 ['github-actions', 'mathlib4-merge-conflict-bot'] nobody
294-23498
9 months ago
298-7362
298 days ago
0-1
1 second
20008 FLDutchmann
author:FLDutchmann
 feat(NumberTheory): Selberg sieve This PR is a working draft of the full proof of the fundamental theorem of the Selberg sieve. I will create dependent PRs as I clean up the code. This work was used in the first proof of the prime number theorem in PNT+. --- - [x] depends on: #20025 - [x] depends on: #20026 - [x] depends on: #20779 - [x] depends on: #21880 - [ ] depends on: #27702 - [ ] depends on: #27707 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-number-theory blocked-by-other-PR merge-conflict awaiting-author t-analysis 937/0 Mathlib/NumberTheory/SelbergSieve/Basic.lean,Mathlib/NumberTheory/SelbergSieve/Selberg.lean,docs/references.bib 3 3 ['github-actions', 'mathlib4-dependent-issues-bot'] nobody
294-21343
9 months ago
unknown
0-0
0 seconds
27050 BoltonBailey
author:BoltonBailey
 doc(Control/Monad/Cont): add docstrings Split of #25917. Adds docstrings to this file. Note: this documentation was written by asking Cursor (Claude 3.5 sonnet) to write the docstrings. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) awaiting-author t-data LLM-generated 183/0 Mathlib/Control/Monad/Cont.lean 1 9 ['BoltonBailey', 'eric-wieser', 'github-actions', 'mathlib-merge-conflicts'] nobody
293-67453
9 months ago
312-85136
312 days ago
0-84441
23 hours
27225 eric-wieser
author:eric-wieser
 refactor(Tactic/Lift): deprecate the third with argument We already have a number of tactics where the clearing happens all the time, and you have to opt out with `id h`. This also fixes a bug where `lift z to Nat with n hn this_is_unused` would silently ignore `this_is_unused`. --- - [ ] depends on: #27223 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) awaiting-author t-meta merge-conflict 21/9 Mathlib/Tactic/Lift.lean,MathlibTest/lift.lean 2 9 ['JovanGerb', 'adomani', 'eric-wieser', 'github-actions', 'leanprover-community-bot-assistant', 'mathlib-merge-conflicts', 'mathlib4-dependent-issues-bot', 'vihdzp'] JovanGerb
assignee:JovanGerb
292-70944
9 months ago
293-31444
293 days ago
15-64386
15 days
26383 eric-wieser
author:eric-wieser
 feat: `Real.sin_eq_one_iff` and similar --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-analysis 155/101 Mathlib/Algebra/ModEq.lean,Mathlib/Analysis/SpecialFunctions/Complex/Log.lean,Mathlib/Analysis/SpecialFunctions/Trigonometric/Angle.lean,Mathlib/Analysis/SpecialFunctions/Trigonometric/Basic.lean,Mathlib/Analysis/SpecialFunctions/Trigonometric/Complex.lean 5 2 ['github-actions', 'leanprover-community-bot-assistant'] nobody
291-42726
9 months ago
unknown
0-0
0 seconds
25991 Multramate
author:Multramate
 feat(AlgebraicGeometry/EllipticCurve): generalise nonsingular condition This PR continues the work from #25219. Original PR: https://github.com/leanprover-community/mathlib4/pull/25219 merge-conflict t-algebraic-geometry 2127/1561 Mathlib/Algebra/Group/Units/Basic.lean,Mathlib/Algebra/Group/Units/Hom.lean,Mathlib/Algebra/Module/PID.lean,Mathlib/AlgebraicGeometry/EllipticCurve/Affine/Basic.lean,Mathlib/AlgebraicGeometry/EllipticCurve/Affine/Formula.lean,Mathlib/AlgebraicGeometry/EllipticCurve/Affine/Point.lean,Mathlib/AlgebraicGeometry/EllipticCurve/Jacobian/Basic.lean,Mathlib/AlgebraicGeometry/EllipticCurve/Jacobian/Formula.lean,Mathlib/AlgebraicGeometry/EllipticCurve/Jacobian/Point.lean,Mathlib/AlgebraicGeometry/EllipticCurve/Projective/Basic.lean,Mathlib/AlgebraicGeometry/EllipticCurve/Projective/Formula.lean,Mathlib/AlgebraicGeometry/EllipticCurve/Projective/Point.lean,Mathlib/RingTheory/DedekindDomain/AdicValuation.lean,Mathlib/RingTheory/Ideal/Maps.lean,Mathlib/RingTheory/Ideal/Span.lean 15 2 ['github-actions', 'leanprover-community-bot-assistant'] nobody
291-42608
9 months ago
321-63725
321 days ago
18-21743
18 days
25986 Multramate
author:Multramate
 feat(AlgebraicGeometry/EllipticCurve/NumberField/Height): define heights on Weierstrass curves This PR continues the work from #15786. Original PR: https://github.com/leanprover-community/mathlib4/pull/15786 t-algebraic-geometry 650/0 Mathlib/AlgebraicGeometry/EllipticCurve/NumberField/Height.lean 1 2 ['Multramate', 'github-actions'] nobody
291-42601
9 months ago
unknown
0-0
0 seconds
25985 Multramate
author:Multramate
 feat(AlgebraicGeometry/EllipticCurve/Jacobian): add equivalences between points and explicit WithZero types This PR continues the work from #14923. Original PR: https://github.com/leanprover-community/mathlib4/pull/14923 merge-conflict t-algebraic-geometry 262/66 Mathlib/AlgebraicGeometry/EllipticCurve/Affine.lean,Mathlib/AlgebraicGeometry/EllipticCurve/Group.lean,Mathlib/AlgebraicGeometry/EllipticCurve/Jacobian.lean,scripts/style-exceptions.txt 4 1 ['Multramate'] nobody
291-42596
9 months ago
339-85814
339 days ago
0-48
48 seconds
25982 Multramate
author:Multramate
 feat(AlgebraicGeometry/EllipticCurve/Group): compute range of baseChange This PR continues the work from #10142. Original PR: https://github.com/leanprover-community/mathlib4/pull/10142 merge-conflict t-algebraic-geometry 421/212 Mathlib/AlgebraicGeometry/EllipticCurve/Affine.lean,Mathlib/AlgebraicGeometry/EllipticCurve/Group.lean,Mathlib/AlgebraicGeometry/EllipticCurve/Weierstrass.lean,Mathlib/GroupTheory/GroupAction/Basic.lean,Mathlib/GroupTheory/Subgroup/Basic.lean,Mathlib/GroupTheory/Submonoid/Operations.lean 6 1 ['Multramate'] nobody
291-42582
9 months ago
339-85981
339 days ago
0-51
51 seconds
25362 adomani
author:adomani
 feat: a linter for duplicated `open` This linter warns when a namespace is repeated. It makes an effort to report only the problematic namespaces, but is not especially robust. The linter has some awareness of the `namespace` command, so ```lean def X.Y := 0 open X namespace X open Y ``` will flag both `namespace X` and `open Y` as problematic, even though it was the `open `X` that became redundant with `namespace X`. However, I will not have much time to devote to polishing this and there are quite a few exception in Mathlib before a better version could be seriously considered for adoption. [#mathlib4 > linter requests @ 💬](https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/linter.20requests/near/520273644) --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) please-adopt merge-conflict t-linter large-import 191/94 Mathlib.lean,Mathlib/Algebra/Group/Pi/Basic.lean,Mathlib/Algebra/GroupWithZero/Pi.lean,Mathlib/Algebra/Order/Ring/InjSurj.lean,Mathlib/CategoryTheory/Functor/ReflectsIso/Basic.lean,Mathlib/Data/Fin/Basic.lean,Mathlib/Data/Finite/Defs.lean,Mathlib/Data/Ineq.lean,Mathlib/Data/List/Lemmas.lean,Mathlib/Data/List/NatAntidiagonal.lean,Mathlib/Data/Nat/Choose/Basic.lean,Mathlib/Data/Nat/Prime/Basic.lean,Mathlib/Data/Nat/Prime/Defs.lean,Mathlib/Data/Set/Image.lean,Mathlib/Data/Set/Insert.lean,Mathlib/Init.lean,Mathlib/Logic/Basic.lean,Mathlib/Logic/Embedding/Set.lean,Mathlib/Logic/Pairwise.lean,Mathlib/Order/BoundedOrder/Basic.lean,Mathlib/Order/WithBot.lean,Mathlib/RingTheory/OreLocalization/Basic.lean,Mathlib/Tactic.lean,Mathlib/Tactic/ApplyFun.lean,Mathlib/Tactic/Bound.lean,Mathlib/Tactic/CongrM.lean,Mathlib/Tactic/Find.lean,Mathlib/Tactic/Lift.lean,Mathlib/Tactic/Linarith/Oracle/FourierMotzkin.lean,Mathlib/Tactic/Linter.lean,Mathlib/Tactic/Linter/DupOpen.lean,Mathlib/Tactic/NormNum/PowMod.lean,Mathlib/Tactic/Recover.lean,Mathlib/Tactic/ReduceModChar.lean,Mathlib/Tactic/Widget/Calc.lean,Mathlib/Tactic/Widget/SelectInsertParamsClass.lean,Mathlib/Tactic/Widget/StringDiagram.lean,Mathlib/Topology/CWComplex/Abstract/Basic.lean,Mathlib/Topology/ContinuousMap/Interval.lean,Mathlib/Topology/Germ.lean,Mathlib/Topology/Homotopy/HSpaces.lean,Mathlib/Topology/Order/LowerUpperTopology.lean,Mathlib/Topology/Order/PartialSups.lean,Mathlib/Topology/Separation/DisjointCover.lean,Mathlib/Topology/Sheaves/Sheafify.lean,Mathlib/Util/CountHeartbeats.lean,MathlibTest/DupOpen.lean 47 14 ['adomani', 'github-actions', 'grunweg', 'leanprover-community-bot-assistant', 'mathlib4-merge-conflict-bot'] nobody
291-42371
9 months ago
354-36153
354 days ago
0-23
23 seconds
25238 Hagb
author:Hagb
 feat(Tactic/ComputeDegree): add support for scalar multiplication with different types It would be able to deal with `a • (X : R[X])` where `a : S` is in a different type `S` with `[SMulZeroClass S R]`. --- - [x] depends on: #25237 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-meta new-contributor 17/5 Mathlib/Tactic/ComputeDegree.lean,MathlibTest/ComputeDegree.lean 2 3 ['github-actions', 'leanprover-community-bot-assistant', 'mathlib4-dependent-issues-bot'] nobody
291-42366
9 months ago
321-64035
321 days ago
38-26044
38 days
17145 Command-Master
author:Command-Master
 feat(Archive/Ioi/Ioi2024Q2): a proof of the solution of question 2 from IOI 2024. --- - [x] depends on: #17189 - [x] depends on: #17190 - [x] depends on: #17191 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict WIP IMO large-import 1013/1 Archive.lean,Archive/Ioi/Ioi2024Q2.lean,Mathlib.lean,Mathlib/Combinatorics/Orbits.lean,Mathlib/Data/List/SplitLengths.lean,Mathlib/Data/List/Transpose.lean,Mathlib/Data/List/Zip.lean,Mathlib/Data/Vector/Basic.lean,Mathlib/Data/Vector/Defs.lean,Mathlib/Data/Vector/MapLemmas.lean,Mathlib/Data/Vector/Transpose.lean,Mathlib/GroupTheory/Perm/Cycle/Basic.lean,Mathlib/Logic/Function/Iterate.lean,Mathlib/Order/Antisymmetrization.lean,Mathlib/Order/Partition/Finpartition.lean 15 2 ['github-actions', 'mathlib4-dependent-issues-bot'] nobody
291-42326
9 months ago
unknown
0-0
0 seconds
27643 ADedecker
author:ADedecker
 Ad bdd unif conv --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict 111/26 Mathlib/Analysis/LocallyConvex/Bounded.lean,Mathlib/Topology/Algebra/Module/StrongTopology.lean,Mathlib/Topology/Algebra/Module/UniformConvergence.lean,Mathlib/Topology/Bornology/Absorbs.lean 4 2 ['github-actions', 'mathlib4-merge-conflict-bot'] nobody
291-21085
9 months ago
unknown
0-0
0 seconds
26385 jjdishere
author:jjdishere
 feat(RingTheory/Perfectoid): define integral perfectoid rings This PR continues the work from #22331. Original PR: https://github.com/leanprover-community/mathlib4/pull/22331 merge-conflict WIP t-ring-theory 1081/15 Mathlib.lean,Mathlib/Algebra/Ring/Aut.lean,Mathlib/FieldTheory/Perfect.lean,Mathlib/RingTheory/AdicCompletion/Basic.lean,Mathlib/RingTheory/Ideal/Maps.lean,Mathlib/RingTheory/Ideal/Quotient/Defs.lean,Mathlib/RingTheory/Ideal/Quotient/PowTransition.lean,Mathlib/RingTheory/Perfection.lean,Mathlib/RingTheory/Perfectoid/BDeRham.lean,Mathlib/RingTheory/Perfectoid/FontaineTheta.lean,Mathlib/RingTheory/Perfectoid/IntergalPerfectoid.lean,Mathlib/RingTheory/Perfectoid/Untilt.lean,Mathlib/RingTheory/WittVector/Basic.lean,Mathlib/RingTheory/WittVector/Complete.lean,Mathlib/RingTheory/WittVector/TeichmullerSeries.lean,docs/references.bib 16 3 ['github-actions', 'jjdishere', 'leanprover-community-bot-assistant'] nobody
290-44793
9 months ago
331-69216
331 days ago
0-79
1 minute
22909 AntoineChambert-Loir
author:AntoineChambert-Loir
 feat(RingTheory/Pure): pure submodules A submodule `N` of an `R`-module is *pure* if all maps `S ⊗[R] N → S ⊗[R] M` deduced by base change from the injection of `N` into `M` are injective, for all `R`-algebras `S`. This is expressed by the class `Submodule.IsPure`. For type theoretic reason, the definition of `Submodule.IsPure` only considers algebras `S` in the same universe as `R`, but `Submodule.IsPure.baseChange_injective` establishes the property for all universes. * `Submodule.IsComplemented.isPure` : a complemented submodule is pure. Co-authored with @mariainesdff --- - [ ] depends on: #22898 - [ ] depends on: #22908 - [x] depends on: #22911 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-ring-theory blocked-by-other-PR 592/3 Mathlib.lean,Mathlib/Algebra/Algebra/Equiv.lean,Mathlib/RingTheory/Adjoin/FG.lean,Mathlib/RingTheory/Finiteness/Basic.lean,Mathlib/RingTheory/Finiteness/Cardinality.lean,Mathlib/RingTheory/Finiteness/Small.lean,Mathlib/RingTheory/Pure.lean,Mathlib/RingTheory/Spectrum/Prime/RingHom.lean,Mathlib/RingTheory/TensorProduct/Basic.lean,Mathlib/RingTheory/TensorProduct/DirectLimit/FG.lean,Mathlib/RingTheory/TensorProduct/DirectLimit/Small.lean 11 3 ['github-actions', 'leanprover-community-bot-assistant', 'mathlib4-dependent-issues-bot'] nobody
290-44508
9 months ago
434-81714
434 days ago
0-1047
17 minutes
22908 AntoineChambert-Loir
author:AntoineChambert-Loir
 feat(RingTheory/Finiteness/Small): tensor product of the system of small submodules The directed limit of a tensor product for the directed system of small submodules. Co-authored with @mariainesdff --- - [ ] depends on: #22898 - [x] depends on: #22911 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-ring-theory blocked-by-other-PR 624/2 Mathlib.lean,Mathlib/RingTheory/Adjoin/FG.lean,Mathlib/RingTheory/Finiteness/Basic.lean,Mathlib/RingTheory/Finiteness/Cardinality.lean,Mathlib/RingTheory/Finiteness/Small.lean,Mathlib/RingTheory/Spectrum/Prime/RingHom.lean,Mathlib/RingTheory/TensorProduct/Basic.lean,Mathlib/RingTheory/TensorProduct/DirectLimit/FG.lean,Mathlib/RingTheory/TensorProduct/DirectLimit/Small.lean 9 2 ['github-actions', 'mathlib4-dependent-issues-bot'] nobody
290-44460
9 months ago
434-81713
434 days ago
0-3552
59 minutes
22898 AntoineChambert-Loir
author:AntoineChambert-Loir
 feat(RingTheory/TensorProduct/DirectLimit/FG): direct limit of finitely generated submodules and tensor product --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict WIP t-ring-theory 399/0 Mathlib.lean,Mathlib/RingTheory/Adjoin/FG.lean,Mathlib/RingTheory/Finiteness/Basic.lean,Mathlib/RingTheory/TensorProduct/Basic.lean,Mathlib/RingTheory/TensorProduct/DirectLimit/FG.lean 5 9 ['AntoineChambert-Loir', 'alreadydone', 'github-actions', 'leanprover-community-bot-assistant'] nobody
290-44453
9 months ago
424-76954
424 days ago
10-44390
10 days
20431 erdOne
author:erdOne
 feat(RingTheory/AdicCompletion): monotonicity of adic-completeness --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict awaiting-author t-ring-theory 206/16 Mathlib.lean,Mathlib/Algebra/Module/Submodule/Defs.lean,Mathlib/Algebra/Module/Submodule/Pointwise.lean,Mathlib/RingTheory/AdicCompletion/Algebra.lean,Mathlib/RingTheory/AdicCompletion/Basic.lean,Mathlib/RingTheory/AdicCompletion/Mono.lean,Mathlib/RingTheory/Finiteness/Ideal.lean 7 13 ['chrisflav', 'erdOne', 'github-actions'] nobody
290-44409
9 months ago
466-43443
466 days ago
32-78180
32 days
19596 Command-Master
author:Command-Master
 feat(RingTheory/Valuation/PrimeMultiplicity): define `WithTop ℤ`-valued prime multiplicity on a fraction field Moves: - `multiplicity_addValuation` -> `AddValuation.multiplicity` - `multiplicity_addValuation_apply` -> `AddValuation.multiplicity_apply` --- - [x] depends on: #19149 - [x] depends on: #18786 - [x] depends on: #19122 - [x] depends on: #18954 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict awaiting-author t-ring-theory large-import 101/37 Mathlib/Data/ENat/Basic.lean,Mathlib/RingTheory/DiscreteValuationRing/Basic.lean,Mathlib/RingTheory/Valuation/PrimeMultiplicity.lean 3 11 ['ChrisHughes24', 'Command-Master', 'Vierkantor', 'faenuccio', 'github-actions', 'mathlib4-dependent-issues-bot'] nobody
290-44394
9 months ago
495-20328
495 days ago
8-2214
8 days
18646 jxjwan
author:jxjwan
 feat(RingTheory): isotypic components --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-ring-theory new-contributor 308/0 Mathlib/Order/CompactlyGenerated/Basic.lean,Mathlib/RingTheory/Isotypic.lean,Mathlib/RingTheory/SimpleModule.lean 3 1 ['github-actions'] nobody
290-44387
9 months ago
543-37980
543 days ago
20-16585
20 days
17246 pechersky
author:pechersky
 feat(RingTheory/PrimaryDecomposition): PIR of Noetherian under jacobson condition --- - [x] depends on: #17634 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict awaiting-author t-ring-theory 653/1 Mathlib.lean,Mathlib/NumberTheory/KummerDedekind.lean,Mathlib/RingTheory/Ideal/Maps.lean,Mathlib/RingTheory/Ideal/Operations.lean,Mathlib/RingTheory/Ideal/Quotient/Operations.lean,Mathlib/RingTheory/Jacobson/Ideal.lean,Mathlib/RingTheory/PrimaryDecomposition.lean,docs/references.bib 8 8 ['erdOne', 'github-actions', 'mathlib4-dependent-issues-bot'] erdOne
assignee:erdOne
290-44381
9 months ago
551-66274
551 days ago
13-7138
13 days
21474 erdOne
author:erdOne
 feat(RingTheory): replace `Ring.DimensionLEOne` with `Ring.KrullDimLE` --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-ring-theory large-import 285/170 Mathlib.lean,Mathlib/RingTheory/DedekindDomain/Basic.lean,Mathlib/RingTheory/DedekindDomain/Dvr.lean,Mathlib/RingTheory/DedekindDomain/Ideal.lean,Mathlib/RingTheory/DiscreteValuationRing/TFAE.lean,Mathlib/RingTheory/Ideal/Over.lean,Mathlib/RingTheory/KrullDimension/Basic.lean,Mathlib/RingTheory/KrullDimension/Localization.lean,Mathlib/RingTheory/KrullDimension/Polynomial.lean,Mathlib/RingTheory/KrullDimension/Quotient.lean,Mathlib/RingTheory/LocalRing/ResidueField/Basic.lean,Mathlib/RingTheory/Nilpotent/End.lean,Mathlib/RingTheory/Nilpotent/Lemmas.lean,Mathlib/RingTheory/PID/Quotient.lean,Mathlib/RingTheory/PrincipalIdealDomain.lean,Mathlib/RingTheory/Spectrum/Maximal/Localization.lean 16 1 ['github-actions'] nobody
290-44325
9 months ago
471-24362
471 days ago
0-81
1 minute
8195 newell
author:newell
 feat: add a group presentation of the `DihedralGroup n` Add group presentation $\< a, b\ |\ a ^ 2 = 1, b ^ 2 = 1, (a * b) ^ n = 1 \>$ for `DihedralGroup n`. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict WIP t-group-theory 206/2 Mathlib/GroupTheory/PresentedGroup.lean,Mathlib/GroupTheory/SpecificGroups/Dihedral.lean 2 6 ['kbuzzard', 'newell'] nobody
290-44124
9 months ago
unknown
0-0
0 seconds
11212 shuxuezhuyi
author:shuxuezhuyi
 feat(GroupTheory/GroupAction): instance `MulAction (β ⧸ H) α` We instance this naturally from `MulAction β α` when `H` is a normal subgroup and acts trivially on `α`. We also instance `IsometricSMul (M ⧸ N) X` in this way. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict awaiting-author t-group-theory large-import 53/1 Mathlib/GroupTheory/GroupAction/Quotient.lean,Mathlib/Topology/MetricSpace/IsometricSMul.lean 2 6 ['YaelDillies', 'github-actions', 'grunweg', 'urkud'] eric-wieser
assignee:eric-wieser
290-44117
9 months ago
503-45456
503 days ago
193-73871
193 days
27886 alreadydone
author:alreadydone
 feat(Algebra): (Mv)Polynomial.X is irreducible assuming NoZeroDivisors --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict awaiting-author t-algebra
label:t-algebra$
 178/66 Archive/Examples/Eisenstein.lean,Mathlib/Algebra/MvPolynomial/Basic.lean,Mathlib/Algebra/Polynomial/Basic.lean,Mathlib/Algebra/Polynomial/Degree/Domain.lean,Mathlib/Algebra/Polynomial/Degree/Units.lean,Mathlib/Algebra/Polynomial/Monic.lean,Mathlib/Algebra/Polynomial/RingDivision.lean,Mathlib/Combinatorics/Nullstellensatz.lean,Mathlib/RingTheory/MvPolynomial/Groebner.lean,Mathlib/RingTheory/MvPolynomial/MonomialOrder.lean,Mathlib/RingTheory/MvPolynomial/MonomialOrder/DegLex.lean,Mathlib/RingTheory/Polynomial/Content.lean,Mathlib/RingTheory/Polynomial/Eisenstein/Criterion.lean 13 3 ['alreadydone', 'github-actions', 'mathlib4-merge-conflict-bot'] nobody
290-41852
9 months ago
291-48593
291 days ago
0-80025
22 hours
26200 adomani
author:adomani
 fix: add label when landrun fails Adds the `permission-denied` label on PRs that get blocked by landrun. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict CI 68/8 .github/build.in.yml,.github/workflows/bors.yml,.github/workflows/build.yml,.github/workflows/build_fork.yml 4 2 ['github-actions', 'mathlib4-merge-conflict-bot'] nobody
289-79719
9 months ago
289-79719
289 days ago
46-52210
46 days
17469 joelriou
author:joelriou
 feat(Algebra/ModuleCat/Differentials/Presheaf): the presheaf of relative differentials Given a functor `F : C ⥤ D`, presheaves of commutative rings `S`, `R` and a morphism `φ : S ⟶ F.op ⋙ R`, we show that derivations relative to `φ` are representable by a presheaf of `R`-modules. This is obtained by reducing to the case of absolute differentials. The construction shall allow to deduce the presheaf version of the cokernel sequence $$f^\star \Omega_{Y/S} ⟶ \Omega_{X/S} ⟶ \Omega_{X/Y} ⟶ 0$$ when `f : X ⟶ Y` and `g : Y ⟶ S` are morphisms of schemes. --- - [x] depends on: #17366 - [x] depends on: #19507 - [x] depends on: #17388 - [x] depends on: #16755 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) WIP t-category-theory large-import merge-conflict t-algebraic-geometry 391/10 Mathlib/Algebra/Category/ModuleCat/Differentials/Presheaf.lean 1 4 ['github-actions', 'leanprover-community-bot-assistant', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
289-75068
9 months ago
593-31775
593 days ago
0-530
8 minutes
25288 robertmaxton42
author:robertmaxton42
 feat(CategoryTheory): generalize `Discrete` to arbitrary morphism levels Using an unused `let`, add an 'anchor' to the definition of `Discrete`, allowing it to carry a second universe level that is then used to permit discrete categories to live in any `Cat.{v, u}`. (This trick was borrowed from the code of `ULiftHom`.) --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-category-theory 38/32 Mathlib/CategoryTheory/Bicategory/LocallyDiscrete.lean,Mathlib/CategoryTheory/Discrete/Basic.lean,Mathlib/CategoryTheory/IsConnected.lean 3 3 ['github-actions', 'joelriou', 'mathlib4-merge-conflict-bot'] nobody
289-64427
9 months ago
358-54128
358 days ago
0-15615
4 hours
27709 kckennylau
author:kckennylau
 chore: fix links --- See https://github.com/leanprover-community/mathlib4/pull/27545#discussion_r2238206933 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict WIP 269/256 Mathlib/Algebra/Algebra/Bilinear.lean,Mathlib/Algebra/GCDMonoid/Multiset.lean,Mathlib/Algebra/Group/Even.lean,Mathlib/Algebra/Group/Pi/Basic.lean,Mathlib/Algebra/Group/Pi/Lemmas.lean,Mathlib/Algebra/Group/TypeTags/Basic.lean,Mathlib/Algebra/Homology/DerivedCategory/Basic.lean,Mathlib/Algebra/Homology/Embedding/Basic.lean,Mathlib/Algebra/Module/Hom.lean,Mathlib/Algebra/Module/Submodule/Bilinear.lean,Mathlib/Algebra/Order/Field/Pi.lean,Mathlib/Algebra/Order/GroupWithZero/Unbundled/Basic.lean,Mathlib/Algebra/Order/Hom/Basic.lean,Mathlib/Algebra/Order/Monovary.lean,Mathlib/Algebra/Order/Ring/Unbundled/Basic.lean,Mathlib/Algebra/Order/Ring/Unbundled/Rat.lean,Mathlib/Algebra/Ring/Basic.lean,Mathlib/Algebra/Squarefree/Basic.lean,Mathlib/Algebra/Star/BigOperators.lean,Mathlib/Algebra/Star/Free.lean,Mathlib/Algebra/Star/SelfAdjoint.lean,Mathlib/Analysis/Analytic/RadiusLiminf.lean,Mathlib/Analysis/CStarAlgebra/Matrix.lean,Mathlib/Analysis/Calculus/Conformal/NormedSpace.lean,Mathlib/Analysis/Calculus/Deriv/Add.lean,Mathlib/Analysis/Calculus/Deriv/Inv.lean,Mathlib/Analysis/Calculus/Deriv/Inverse.lean,Mathlib/Analysis/Calculus/Deriv/Linear.lean,Mathlib/Analysis/Calculus/Deriv/Mul.lean,Mathlib/Analysis/Complex/Basic.lean,Mathlib/Analysis/Complex/Circle.lean,Mathlib/Analysis/Complex/OperatorNorm.lean,Mathlib/Analysis/Convex/Function.lean,Mathlib/Analysis/Convex/Jensen.lean,Mathlib/Analysis/Meromorphic/IsolatedZeros.lean,Mathlib/Analysis/Normed/Operator/BoundedLinearMaps.lean,Mathlib/Analysis/SpecialFunctions/Exponential.lean,Mathlib/Analysis/SpecialFunctions/Trigonometric/Basic.lean,Mathlib/Analysis/SpecialFunctions/Trigonometric/Bounds.lean,Mathlib/Analysis/SpecialFunctions/Trigonometric/EulerSineProd.lean,Mathlib/CategoryTheory/Abelian/Opposite.lean,Mathlib/CategoryTheory/Adjunction/Opposites.lean,Mathlib/CategoryTheory/Bicategory/Functor/Pseudofunctor.lean,Mathlib/CategoryTheory/Closed/Monoidal.lean,Mathlib/CategoryTheory/Limits/Shapes/Kernels.lean,Mathlib/CategoryTheory/Localization/Equivalence.lean,Mathlib/CategoryTheory/Localization/Trifunctor.lean,Mathlib/CategoryTheory/ObjectProperty/Basic.lean,Mathlib/CategoryTheory/Sites/Coherent/SheafComparison.lean,Mathlib/Combinatorics/Colex.lean,Mathlib/Combinatorics/Hall/Finite.lean,Mathlib/Combinatorics/Pigeonhole.lean,Mathlib/Combinatorics/Quiver/Covering.lean,Mathlib/Combinatorics/Quiver/Path.lean,Mathlib/Control/LawfulFix.lean,Mathlib/Data/Complex/Basic.lean,Mathlib/Data/Fin/Pigeonhole.lean,Mathlib/Data/FinEnum/Option.lean,Mathlib/Data/Finset/Filter.lean,Mathlib/Data/Finsupp/Fin.lean,Mathlib/Data/Fintype/BigOperators.lean,Mathlib/Data/Fintype/Defs.lean,Mathlib/Data/Int/Basic.lean,Mathlib/Data/Int/Cast/Basic.lean,Mathlib/Data/Int/Cast/Lemmas.lean,Mathlib/Data/Int/Lemmas.lean,Mathlib/Data/Int/Order/Lemmas.lean,Mathlib/Data/Int/Range.lean,Mathlib/Data/List/Chain.lean,Mathlib/Data/List/Dedup.lean,Mathlib/Data/List/Destutter.lean,Mathlib/Data/List/Forall2.lean,Mathlib/Data/List/Lattice.lean,Mathlib/Data/List/Lemmas.lean,Mathlib/Data/List/Nodup.lean,Mathlib/Data/List/Pairwise.lean,Mathlib/Data/List/Permutation.lean,Mathlib/Data/List/ProdSigma.lean,Mathlib/Data/List/Sections.lean,Mathlib/Data/List/Sublists.lean,Mathlib/Data/Matrix/Notation.lean,Mathlib/Data/Matroid/Minor/Restrict.lean,Mathlib/Data/Multiset/FinsetOps.lean,Mathlib/Data/Nat/Basic.lean,Mathlib/Data/Nat/Cast/WithTop.lean,Mathlib/Data/Nat/Choose/Basic.lean,Mathlib/Data/Nat/Factorization/Basic.lean,Mathlib/Data/Nat/Factorization/LCM.lean,Mathlib/Data/PSigma/Order.lean,Mathlib/Data/Prod/Lex.lean,Mathlib/Data/Rat/Encodable.lean,Mathlib/Data/Set/Card.lean,Mathlib/Data/Set/Defs.lean,Mathlib/Data/Set/Finite/Basic.lean,Mathlib/Data/Set/Finite/Lattice.lean,Mathlib/Data/Set/Functor.lean,Mathlib/Data/Set/Notation.lean,Mathlib/Data/Set/Pairwise/Basic.lean,Mathlib/Data/Set/Prod.lean,Mathlib/Data/Sigma/Lex.lean 157 87 ['github-actions', 'kbuzzard', 'kckennylau', 'mathlib4-merge-conflict-bot'] nobody
289-62638
9 months ago
295-76279
295 days ago
0-9
9 seconds
10345 newell
author:newell
 feat(Algebra.Module.Zlattice): Add Voronoi Domain Adds the definition for a Voronoi Domain in regards to the $\mathbb{Z}$-lattice: $$C := \lbrace\mathbf{w} \in \mathbb{V}^n\ :\ |\mathbf{w}| \leq |\mathbf{w} - \mathbf{v}|\ \text{for all}\ \mathbf{v} \in \mathbf{L} \rbrace$$ where $\mathbf{L}\$ is the $\mathbb{Z}$-lattice. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict WIP t-algebra
label:t-algebra$
 17/0 Mathlib/Algebra/Module/Zlattice.lean 1 3 ['alreadydone', 'newell'] nobody
288-80526
9 months ago
unknown
0-0
0 seconds
28075 tristan-f-r
author:tristan-f-r
 chore(Finsupp/Indicator): make non-classical This was surprising to see on a data-carrying definition. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) awaiting-author t-data easy merge-conflict 11/9 Mathlib/Algebra/BigOperators/Finsupp/Basic.lean,Mathlib/Data/Finsupp/Indicator.lean 2 4 ['github-actions', 'mathlib-merge-conflicts', 'ocfnash', 'tristan-f-r'] nobody
287-2951
9 months ago
287-46770
287 days ago
0-85904
23 hours
28168 astrainfinita
author:astrainfinita
 feat: hensel's lemma for topological rings --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra WIP t-ring-theory t-topology
label:t-algebra$
 616/0 Mathlib/RingTheory/Polynomial/Hensel.lean 1 1 ['github-actions'] nobody
285-74786
9 months ago
unknown
0-0
0 seconds
20671 thefundamentaltheor3m
author:thefundamentaltheor3m
 feat(Analysis/Asymptotics/SpecificAsymptotics): Proving that 𝛔ₖ(n) = O(nᵏ⁺¹) This PR proves a result about the $\sigma_k(n)$ arithmetic function, namely, that it is $O\left(n^{k+1}\right)$. Main theorem: `theorem sigma_asymptotic (k : ℕ) : (fun n ↦ (σ k n : ℝ)) =O[atTop] (fun n ↦ (n ^ (k + 1) : ℝ))` This result was proved as part of the sphere packing project. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-number-theory new-contributor large-import merge-conflict awaiting-author 29/0 Mathlib/Analysis/Asymptotics/SpecificAsymptotics.lean 1 3 ['b-mehta', 'github-actions', 'mathlib4-merge-conflict-bot'] b-mehta
assignee:b-mehta
285-47928
9 months ago
486-22743
486 days ago
9-59130
9 days
20267 joelriou
author:joelriou
 feat(CategoryTheory): comma categories are accessible --- (I shall probably not work on this PR in the near future.) - [ ] depends on: #19937 - [ ] depends on: #19945 - [ ] depends on: #19959 - [ ] depends on: #20005 - [ ] depends on: #19955 - [x] depends on: #20263 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict WIP awaiting-author t-category-theory 1513/7 Mathlib.lean,Mathlib/CategoryTheory/Comma/Arrow.lean,Mathlib/CategoryTheory/Comma/CardinalArrow.lean,Mathlib/CategoryTheory/EssentiallySmall.lean,Mathlib/CategoryTheory/Limits/Comma.lean,Mathlib/CategoryTheory/Limits/TypesFiltered.lean,Mathlib/CategoryTheory/Presentable/Basic.lean,Mathlib/CategoryTheory/Presentable/CardinalFilteredPresentation.lean,Mathlib/CategoryTheory/Presentable/Comma.lean,Mathlib/CategoryTheory/Presentable/IsCardinalFiltered.lean,Mathlib/CategoryTheory/Presentable/Limits.lean,Mathlib/CategoryTheory/Presentable/LocallyPresentable.lean,Mathlib/CategoryTheory/Presentable/ParallelMaps.lean,Mathlib/SetTheory/Cardinal/HasCardinalLT.lean,docs/references.bib 15 2 ['github-actions', 'mathlib4-dependent-issues-bot'] nobody
285-40895
9 months ago
unknown
0-0
0 seconds
27451 kckennylau
author:kckennylau
 feat(RingTheory/Valuation): define ball, closed ball, and sphere *From the 2025 Local Class Field Theory Workshop.* --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-ring-theory 27/0 Mathlib/RingTheory/Valuation/Basic.lean 1 13 ['JovanGerb', 'github-actions', 'kckennylau', 'mathlib4-merge-conflict-bot', 'pechersky', 'wwylele'] nobody
284-25822
9 months ago
284-25823
284 days ago
17-52359
17 days
27987 kckennylau
author:kckennylau
 feat(RingTheory/Valuation): define ball, closed ball, and sphere --- The pullback PR of #26827 and #27451. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-ring-theory large-import 73/0 Mathlib/RingTheory/Valuation/Basic.lean 1 4 ['JovanGerb', 'github-actions', 'kckennylau', 'mathlib4-merge-conflict-bot'] nobody
284-25451
9 months ago
284-25452
284 days ago
6-6455
6 days
27444 grunweg
author:grunweg
 feat: generalise more lemmas to enorms The selection of lemmas may seem eclectic, but follows a clear path: I'm working on generalising the last section of `IntegrableOn.lean` to enorms. (This will be continued in a later PR.) --- Commits can be reviewed independently. - [x] depends on: #27419 (first commits) - [x] depends on: #27456 (last commits) [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) carleson WIP 10/0 Mathlib/MeasureTheory/Function/L1Space/HasFiniteIntegral.lean 1 3 ['github-actions', 'grunweg', 'mathlib4-dependent-issues-bot'] nobody
284-21447
9 months ago
302-4458
302 days ago
0-259
4 minutes
24862 grunweg
author:grunweg
 feat(LocallyIntegrable): generalise more to enorms --- Note: github's diff is very confused; it includes changes which very clearly are already on the master branch. I'll see which of the remaining changes after the dependencies have landed is already polished enough. - [x] depends on: #24352 - [x] depends on: #27457 (this half is settled already) - [ ] open question: filter lemmas; IsBoundedUnder is not the right condition as-is; need to think (or just not generalise) [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict WIP carleson t-measure-probability 171/88 Mathlib/MeasureTheory/Function/L1Space/HasFiniteIntegral.lean,Mathlib/MeasureTheory/Function/LocallyIntegrable.lean,Mathlib/MeasureTheory/Integral/IntegrableOn.lean 3 3 ['github-actions', 'leanprover-community-bot-assistant', 'mathlib4-dependent-issues-bot'] nobody
284-19172
9 months ago
374-531
374 days ago
0-1
1 second
25133 erdOne
author:erdOne
 feat(Tactic/NormNum): support positive characteristic Co-authored-by: Heather Macbeth --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict WIP large-import t-meta 250/39 Mathlib/Tactic/NormNum/CharP.lean,Mathlib/Tactic/NormNum/Core.lean,Mathlib/Tactic/NormNum/Eq.lean,Mathlib/Tactic/NormNum/Inv.lean,Mathlib/Tactic/NormNum/Test.lean 5 5 ['erdOne', 'eric-wieser', 'github-actions', 'mathlib4-merge-conflict-bot'] nobody
282-40611
9 months ago
unknown
0-0
0 seconds
27003 eric-wieser
author:eric-wieser
 chore: use `Simp.ResultQ` more often Also uses `~q` in place of manual `isDefEq` matching. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-meta 18/22 Mathlib/Tactic/NormNum/Core.lean,Mathlib/Tactic/NormNum/Result.lean,Mathlib/Tactic/ReduceModChar.lean 3 7 ['JovanGerb', 'eric-wieser', 'github-actions', 'mathlib4-merge-conflict-bot'] JovanGerb
assignee:JovanGerb
282-40075
9 months ago
282-40076
282 days ago
32-70098
32 days
16150 urkud
author:urkud
 feat(Dynamics): Hopf decomposition Prove Hopf decomposition. - [ ] rewrite to work with the saturations right away, not with a wandering set. - [ ] generalize to an action of a countable group, use fundamental domains. --- - [ ] depends on: #16146 - [ ] depends on: #16126 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-dynamics t-measure-probability 212/0 Mathlib.lean,Mathlib/Dynamics/Ergodic/Dissipative.lean,Mathlib/MeasureTheory/MeasurableSpace/Basic.lean 3 4 ['github-actions', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot', 'urkud'] nobody
282-8047
9 months ago
unknown
0-0
0 seconds
25401 digama0
author:digama0
 feat(Util): SuppressSorry option See also leanprover/lean4#8611 and [#lean4 > Silent sorry @ 💬](https://leanprover.zulipchat.com/#narrow/channel/270676-lean4/topic/Silent.20sorry/near/503537964). This is a stop-gap solution while leanprover/lean4#8611 is underway, but it works about as well as any other built in option. Hooking declaration elaborators turns out to be a very powerful technique. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-meta 342/0 Mathlib.lean,Mathlib/Util/CommandElabHook.lean,Mathlib/Util/SuppressSorry.lean,MathlibTest/suppressSorry.lean 4 15 ['digama0', 'eric-wieser', 'github-actions', 'mathlib4-merge-conflict-bot'] alexjbest
assignee:alexjbest
281-81271
9 months ago
281-81271
281 days ago
71-27957
71 days
27759 plp127
author:plp127
 chore(FreeAbelianGroup): deprecate multiplication Deprecate multiplication on `FreeAbelianGroup` in favor of using `MonoidAlgebra`. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-algebra large-import
label:t-algebra$
 176/86 Mathlib/Algebra/Algebra/Hom.lean,Mathlib/Algebra/MonoidAlgebra/MapDomain.lean,Mathlib/GroupTheory/FreeAbelianGroup.lean,Mathlib/RingTheory/FreeCommRing.lean,Mathlib/RingTheory/FreeRing.lean 5 2 ['github-actions', 'mathlib4-merge-conflict-bot'] nobody
280-47717
9 months ago
294-28029
294 days ago
0-79663
22 hours
21776 alreadydone
author:alreadydone
 Invertible modules --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-algebra
label:t-algebra$
 571/26 Mathlib/Algebra/Algebra/Operations.lean,Mathlib/Algebra/Module/Submodule/Equiv.lean,Mathlib/Data/Set/Semiring.lean,Mathlib/RingTheory/FractionalIdeal/Operations.lean,Mathlib/RingTheory/PicardGroup.lean 5 3 ['alreadydone', 'github-actions', 'mathlib4-merge-conflict-bot'] nobody
279-47266
9 months ago
464-59755
464 days ago
0-19
19 seconds
20722 ctchou
author:ctchou
 feat(Counterexamples): the Vitali set is non-measurable --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) please-adopt t-measure-probability new-contributor merge-conflict awaiting-author 258/3 Counterexamples.lean,Counterexamples/VitaliSetNotMeasurable.lean,Mathlib/MeasureTheory/Measure/NullMeasurable.lean,docs/1000.yaml 4 76 ['ctchou', 'github-actions', 'grunweg', 'mathlib4-merge-conflict-bot', 'vihdzp'] vihdzp
assignee:vihdzp
279-37612
9 months ago
493-29582
493 days ago
0-47663
13 hours
27446 grunweg
author:grunweg
 chore: more enorm lemmas Nothing to see yet: this is a big mess! Start unrolling at `eLpNorm_le_eLpNorm_top_mul_eLpNorm_enorm`; that proof could be a good next target. Need a version of `eLpNorm'_const_smul' which applies to NNReal (or ENNReal, I guess): need to generalise a bunch of lemmas for that. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict WIP carleson 107/9 Mathlib/MeasureTheory/Function/LpSeminorm/Basic.lean,Mathlib/MeasureTheory/Function/LpSeminorm/CompareExp.lean,Mathlib/MeasureTheory/Integral/IntegrableOn.lean 3 3 ['github-actions', 'leanprover-community-bot-assistant', 'mathlib4-merge-conflict-bot'] nobody
279-29126
9 months ago
302-3601
302 days ago
0-172
2 minutes
5897 eric-wieser
author:eric-wieser
 feat: add a `MonadError` instance for `ContT` We already have a `MonadExcept` instance; this promotes it to `MonadError`. Note the issue with the existing `MonadExcept` instance still applies. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) awaiting-author t-meta 16/0 Mathlib/Control/Monad/Cont.lean 1 25 ['Vierkantor', 'YaelDillies', 'eric-wieser', 'github-actions', 'kmill'] nobody
277-38426
9 months ago
703-51228
703 days ago
339-54818
339 days
28276 eric-wieser
author:eric-wieser
 refactor: tidy `lift_unique` lemmas --- - [ ] depends on: #28275 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra
label:t-algebra$
 37/20 Mathlib/Algebra/FreeAlgebra.lean,Mathlib/Algebra/Lie/UniversalEnveloping.lean,Mathlib/LinearAlgebra/DFinsupp.lean,Mathlib/LinearAlgebra/ExteriorAlgebra/Basic.lean 4 3 ['github-actions', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
277-37697
9 months ago
unknown
0-0
0 seconds
28502 gilesgshaw
author:gilesgshaw
 feat(Logic/Basic): avoid unnecessary uses of choice Certain proofs are modified to remove a dependence on the axoim of choice --- - [ ] depends on: #28623 blocked-by-other-PR new-contributor merge-conflict awaiting-author t-logic 83/74 Mathlib/Logic/Basic.lean 1 7 ['Ruben-VandeVelde', 'eric-wieser', 'gilesgshaw', 'github-actions', 'kim-em', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
276-59424
9 months ago
279-44953
279 days ago
0-35689
9 hours
28622 alreadydone
author:alreadydone
 chore(Mathlib): replace `=>` by `↦` --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict 51792/51792 Mathlib/Algebra/AddTorsor/Basic.lean,Mathlib/Algebra/AddTorsor/Defs.lean,Mathlib/Algebra/Algebra/Basic.lean,Mathlib/Algebra/Algebra/Bilinear.lean,Mathlib/Algebra/Algebra/Defs.lean,Mathlib/Algebra/Algebra/Equiv.lean,Mathlib/Algebra/Algebra/Hom.lean,Mathlib/Algebra/Algebra/Hom/Rat.lean,Mathlib/Algebra/Algebra/NonUnitalHom.lean,Mathlib/Algebra/Algebra/NonUnitalSubalgebra.lean,Mathlib/Algebra/Algebra/Operations.lean,Mathlib/Algebra/Algebra/Opposite.lean,Mathlib/Algebra/Algebra/Prod.lean,Mathlib/Algebra/Algebra/Rat.lean,Mathlib/Algebra/Algebra/Spectrum/Basic.lean,Mathlib/Algebra/Algebra/Spectrum/Pi.lean,Mathlib/Algebra/Algebra/Spectrum/Quasispectrum.lean,Mathlib/Algebra/Algebra/Subalgebra/Basic.lean,Mathlib/Algebra/Algebra/Subalgebra/Centralizer.lean,Mathlib/Algebra/Algebra/Subalgebra/Directed.lean,Mathlib/Algebra/Algebra/Subalgebra/IsSimpleOrder.lean,Mathlib/Algebra/Algebra/Subalgebra/Lattice.lean,Mathlib/Algebra/Algebra/Subalgebra/Matrix.lean,Mathlib/Algebra/Algebra/Subalgebra/Operations.lean,Mathlib/Algebra/Algebra/Subalgebra/Pointwise.lean,Mathlib/Algebra/Algebra/Subalgebra/Prod.lean,Mathlib/Algebra/Algebra/Subalgebra/Unitization.lean,Mathlib/Algebra/Algebra/Tower.lean,Mathlib/Algebra/Algebra/TransferInstance.lean,Mathlib/Algebra/Algebra/Unitization.lean,Mathlib/Algebra/Algebra/ZMod.lean,Mathlib/Algebra/AlgebraicCard.lean,Mathlib/Algebra/BigOperators/Associated.lean,Mathlib/Algebra/BigOperators/Expect.lean,Mathlib/Algebra/BigOperators/Fin.lean,Mathlib/Algebra/BigOperators/Finprod.lean,Mathlib/Algebra/BigOperators/Finsupp/Basic.lean,Mathlib/Algebra/BigOperators/Finsupp/Fin.lean,Mathlib/Algebra/BigOperators/Group/Finset/Basic.lean,Mathlib/Algebra/BigOperators/Group/Finset/Defs.lean,Mathlib/Algebra/BigOperators/Group/Finset/Piecewise.lean,Mathlib/Algebra/BigOperators/Group/Finset/Sigma.lean,Mathlib/Algebra/BigOperators/Group/List/Basic.lean,Mathlib/Algebra/BigOperators/Group/List/Defs.lean,Mathlib/Algebra/BigOperators/Group/List/Lemmas.lean,Mathlib/Algebra/BigOperators/Group/Multiset/Basic.lean,Mathlib/Algebra/BigOperators/Group/Multiset/Defs.lean,Mathlib/Algebra/BigOperators/GroupWithZero/Finset.lean,Mathlib/Algebra/BigOperators/Intervals.lean,Mathlib/Algebra/BigOperators/Option.lean,Mathlib/Algebra/BigOperators/Pi.lean,Mathlib/Algebra/BigOperators/Ring/Finset.lean,Mathlib/Algebra/BigOperators/Ring/Multiset.lean,Mathlib/Algebra/Category/AlgCat/Basic.lean,Mathlib/Algebra/Category/AlgCat/Limits.lean,Mathlib/Algebra/Category/AlgCat/Monoidal.lean,Mathlib/Algebra/Category/BialgCat/Basic.lean,Mathlib/Algebra/Category/BoolRing.lean,Mathlib/Algebra/Category/CoalgCat/Basic.lean,Mathlib/Algebra/Category/CoalgCat/ComonEquivalence.lean,Mathlib/Algebra/Category/FGModuleCat/Limits.lean,Mathlib/Algebra/Category/Grp/AB.lean,Mathlib/Algebra/Category/Grp/Adjunctions.lean,Mathlib/Algebra/Category/Grp/Basic.lean,Mathlib/Algebra/Category/Grp/Biproducts.lean,Mathlib/Algebra/Category/Grp/CartesianMonoidal.lean,Mathlib/Algebra/Category/Grp/Colimits.lean,Mathlib/Algebra/Category/Grp/EpiMono.lean,Mathlib/Algebra/Category/Grp/FilteredColimits.lean,Mathlib/Algebra/Category/Grp/Images.lean,Mathlib/Algebra/Category/Grp/Kernels.lean,Mathlib/Algebra/Category/Grp/LargeColimits.lean,Mathlib/Algebra/Category/Grp/LeftExactFunctor.lean,Mathlib/Algebra/Category/Grp/Limits.lean,Mathlib/Algebra/Category/Grp/Preadditive.lean,Mathlib/Algebra/Category/Grp/ZModuleEquivalence.lean,Mathlib/Algebra/Category/Grp/Zero.lean,Mathlib/Algebra/Category/GrpWithZero.lean,Mathlib/Algebra/Category/HopfAlgCat/Basic.lean,Mathlib/Algebra/Category/ModuleCat/Adjunctions.lean,Mathlib/Algebra/Category/ModuleCat/Basic.lean,Mathlib/Algebra/Category/ModuleCat/Biproducts.lean,Mathlib/Algebra/Category/ModuleCat/ChangeOfRings.lean,Mathlib/Algebra/Category/ModuleCat/Colimits.lean,Mathlib/Algebra/Category/ModuleCat/EpiMono.lean,Mathlib/Algebra/Category/ModuleCat/FilteredColimits.lean,Mathlib/Algebra/Category/ModuleCat/Images.lean,Mathlib/Algebra/Category/ModuleCat/Injective.lean,Mathlib/Algebra/Category/ModuleCat/Kernels.lean,Mathlib/Algebra/Category/ModuleCat/Limits.lean,Mathlib/Algebra/Category/ModuleCat/Monoidal/Basic.lean,Mathlib/Algebra/Category/ModuleCat/Monoidal/Closed.lean,Mathlib/Algebra/Category/ModuleCat/Monoidal/Symmetric.lean,Mathlib/Algebra/Category/ModuleCat/Presheaf.lean,Mathlib/Algebra/Category/ModuleCat/Presheaf/Abelian.lean,Mathlib/Algebra/Category/ModuleCat/Presheaf/Colimits.lean,Mathlib/Algebra/Category/ModuleCat/Presheaf/Limits.lean,Mathlib/Algebra/Category/ModuleCat/Presheaf/Pushforward.lean,Mathlib/Algebra/Category/ModuleCat/Presheaf/Sheafify.lean,Mathlib/Algebra/Category/ModuleCat/Products.lean 3838 4 ['github-actions', 'mathlib4-merge-conflict-bot'] nobody
275-84751
9 months ago
275-84752
275 days ago
0-62065
17 hours
24793 tristan-f-r
author:tristan-f-r
 feat: trace of unitarily similar matrices adds a theorem relating trace to unitarily similar matrices used in the easy direction of specht's theorem --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict awaiting-author t-algebra
label:t-algebra$
 7/0 Mathlib/LinearAlgebra/UnitaryGroup.lean 1 4 ['github-actions', 'j-loreaux', 'mathlib4-merge-conflict-bot', 'tristan-f-r'] nobody
275-80390
9 months ago
374-25439
374 days ago
1-55872
1 day
27198 robin-carlier
author:robin-carlier
 feat(CategoryTheory/Monoidal/DayConvolution): the Yoneda embedding is monoidal (for Day convolution) We show that the Yoneda embedding is monoidal when we interpret its target category as Day presheaves (i.e presheaves with the Day convolution monoidal structure). The actual way we prove it is by registering a `LawfulDayConvolutionMonoidalCategoryStruct Cᵒᵖ (Type v₁) C`, for which the "interpretation" functor `C ⥤ Cᵒᵖ ⥤ Type v₁` is the Yoneda embedding. This allows to state a result independently of any size constraint on `C`. Then, we specialize to the case of a small category `C`, in this case, using the fact that the relevant colimit of preseaves exist, we use the fact that the interpretation functor induces a monoidal functor to put a `Monoidal` instance on the functor `dayYoneda : C ⥤ (Cᵒᵖ ⊛⥤ Type v₁) := yoneda ⋙ (equiv Cᵒᵖ _).inverse`. --- I was unsure about which form of simp lemmas we want for characterization of the monoidal structure on `dayYoneda`. I opted for making the "fully applied" lemmas simp, but still leaves the "unapplied" ones as non-simp just in case. - [ ] depends on: #27175 - [x] depends on: #25732 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict file-removed blocked-by-other-PR t-category-theory 1847/26 Mathlib.lean,Mathlib/CategoryTheory/Functor/KanExtension/Basic.lean,Mathlib/CategoryTheory/Monoidal/DayConvolution.lean,Mathlib/CategoryTheory/Monoidal/DayConvolution/DayFunctor.lean,Mathlib/CategoryTheory/Monoidal/DayConvolution/Types.lean,Mathlib/CategoryTheory/Monoidal/Internal/Limits.lean,Mathlib/CategoryTheory/Monoidal/Limits/Basic.lean,Mathlib/CategoryTheory/Monoidal/Limits/Preserves.lean 8 8 ['alreadydone', 'github-actions', 'leanprover-community-bot-assistant', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot', 'robin-carlier'] nobody
275-57957
9 months ago
310-42044
310 days ago
0-21
21 seconds
28626 alreadydone
author:alreadydone
 chore(Archive, Counterexamples): replace => by ↦ --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict 288/288 Archive/Arithcc.lean,Archive/Examples/IfNormalization/Result.lean,Archive/Examples/IfNormalization/WithoutAesop.lean,Archive/Examples/PropEncodable.lean,Archive/Imo/Imo1959Q1.lean,Archive/Imo/Imo1960Q1.lean,Archive/Imo/Imo1962Q4.lean,Archive/Imo/Imo1972Q5.lean,Archive/Imo/Imo1977Q6.lean,Archive/Imo/Imo1981Q3.lean,Archive/Imo/Imo1987Q1.lean,Archive/Imo/Imo1988Q6.lean,Archive/Imo/Imo1994Q1.lean,Archive/Imo/Imo1998Q2.lean,Archive/Imo/Imo2001Q2.lean,Archive/Imo/Imo2006Q3.lean,Archive/Imo/Imo2006Q5.lean,Archive/Imo/Imo2008Q2.lean,Archive/Imo/Imo2008Q4.lean,Archive/Imo/Imo2011Q3.lean,Archive/Imo/Imo2013Q1.lean,Archive/Imo/Imo2019Q1.lean,Archive/Imo/Imo2024Q5.lean,Archive/MiuLanguage/Basic.lean,Archive/MiuLanguage/DecisionSuf.lean,Archive/OxfordInvariants/Summer2021/Week3P1.lean,Archive/Sensitivity.lean,Archive/Wiedijk100Theorems/AbelRuffini.lean,Archive/Wiedijk100Theorems/AreaOfACircle.lean,Archive/Wiedijk100Theorems/AscendingDescendingSequences.lean,Archive/Wiedijk100Theorems/BallotProblem.lean,Archive/Wiedijk100Theorems/BirthdayProblem.lean,Archive/Wiedijk100Theorems/BuffonsNeedle.lean,Archive/Wiedijk100Theorems/CubingACube.lean,Archive/Wiedijk100Theorems/FriendshipGraphs.lean,Archive/Wiedijk100Theorems/Konigsberg.lean,Archive/Wiedijk100Theorems/Partition.lean,Archive/Wiedijk100Theorems/SumOfPrimeReciprocalsDiverges.lean,Archive/ZagierTwoSquares.lean,Counterexamples/AharoniKorman.lean,Counterexamples/CanonicallyOrderedCommSemiringTwoMul.lean,Counterexamples/CharPZeroNeCharZero.lean,Counterexamples/CliffordAlgebraNotInjective.lean,Counterexamples/DirectSumIsInternal.lean,Counterexamples/GameMultiplication.lean,Counterexamples/Girard.lean,Counterexamples/HomogeneousPrimeNotPrime.lean,Counterexamples/MapFloor.lean,Counterexamples/MonicNonRegular.lean,Counterexamples/Phillips.lean,Counterexamples/Pseudoelement.lean,Counterexamples/QuadraticForm.lean,Counterexamples/SorgenfreyLine.lean,Counterexamples/ZeroDivisorsInAddMonoidAlgebras.lean 54 2 ['github-actions', 'mathlib4-merge-conflict-bot'] nobody
274-27477
9 months ago
274-27478
274 days ago
2-47136
2 days
26078 kckennylau
author:kckennylau
 feat(AlgebraicGeometry): add x, y, px, py for points on elliptic curves --- Split from #25218. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) awaiting-author t-algebraic-geometry 44/0 Mathlib/AlgebraicGeometry/EllipticCurve/Affine/Point.lean 1 12 ['MichaelStollBayreuth', 'Multramate', 'acmepjz', 'dagurtomas', 'github-actions', 'kckennylau'] nobody
274-24487
9 months ago
274-24487
274 days ago
64-11252
64 days
19582 yu-yama
author:yu-yama
 feat(GroupExtension/Abelian): define `OfMulDistribMulAction.equivH2` Mainly defines: - `structure GroupExtension.OfMulDistribMulAction N G [MulDistribMulAction G N]`: group extensions of `G` by `N` where the multiplicative action of `G` on `N` is the conjugation - `structure GroupExtension.OfMulDistribMulActionWithSection N G [MulDistribMulAction G N]`: group extensions with specific choices of sections - `def GroupExtension.OfMulDistribMulAction.equivH2`: a bijection between the equivalence classes of group extensions and $H^2 (G, N)$ --- - [x] depends on: #20802 (split PR: contains changes to the `Defs` file) - [x] depends on: #20998 (split PR: mainly adds the `Basic` file) - [ ] depends on: #26670 (split PR: adds the first part of the `Abelian` file) Here is a relevant TODO in Mathlib: https://github.com/leanprover-community/mathlib4/blob/4e9fa40d7c480937e09cd6e47a591bd6f3b8be42/Mathlib/RepresentationTheory/GroupCohomology/LowDegree.lean#L46-L48 I would appreciate your comments. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-algebra blocked-by-other-PR new-contributor
label:t-algebra$
 750/14 Mathlib.lean,Mathlib/GroupTheory/GroupExtension/Abelian.lean,Mathlib/GroupTheory/GroupExtension/Defs.lean,docs/references.bib 4 5 ['YaelDillies', 'erdOne', 'github-actions', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
274-9532
9 months ago
496-66491
496 days ago
43-22586
43 days
7300 ah1112
author:ah1112
 feat: synthetic geometry This is adding synthetic geometry using Avigad's axioms and formalizing Euclid Book I, through the Pythagorean theorem. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict awaiting-author help-wanted t-euclidean-geometry 2661/0 Mathlib.lean,Mathlib/Geometry/Synthetic/Avigad/Axioms.lean,Mathlib/Geometry/Synthetic/Avigad/EuclidBookI.lean,Mathlib/Geometry/Synthetic/Avigad/Tactics.lean 4 74 ['ah1112', 'alreadydone', 'eric-wieser', 'github-actions', 'leanprover-community-bot-assistant', 'plp127', 'tb65536', 'urkud'] nobody
273-72563
9 months ago
974-25048
974 days ago
0-84
1 minute
27403 MoritzBeroRoos
author:MoritzBeroRoos
 fix: replace probably erroneous usage of ⬝ (with old \cdot) by · (with \centerdot) Discussion at [zulip](https://leanprover.zulipchat.com/#narrow/channel/270676-lean4/topic/.5Ccdot.20!.3D.20.5Ccenterdot). Currently the abbreviations \cdot and \centerdot resolve to different, with the naked eye nearly undistinguishable symbols (despite the c in cdot surely standing for center..). This pr replaces instances of ⬝ where · was probably meant. All of the replacement is in comments, except for the file bench_summary.lean which is used for priting the github benchmark results. Since this file is about scientific notation of numbers, sure · was meant to be used, not a rectangle. [Related](https://github.com/leanprover-community/mathlib4/pull/27399) --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict new-contributor 195/195 Mathlib/Algebra/ContinuedFractions/Computation/Approximations.lean,Mathlib/Algebra/DirectSum/Idempotents.lean,Mathlib/Algebra/Lie/Derivation/Basic.lean,Mathlib/Algebra/Module/Equiv/Basic.lean,Mathlib/AlgebraicGeometry/EllipticCurve/DivisionPolynomial/Basic.lean,Mathlib/Analysis/Analytic/Constructions.lean,Mathlib/Analysis/CStarAlgebra/CStarMatrix.lean,Mathlib/Analysis/Calculus/ContDiff/Basic.lean,Mathlib/Analysis/Calculus/ContDiff/Bounds.lean,Mathlib/Analysis/Calculus/FDeriv/Symmetric.lean,Mathlib/Analysis/Fourier/FourierTransformDeriv.lean,Mathlib/Analysis/InnerProductSpace/Dual.lean,Mathlib/Analysis/InnerProductSpace/PiL2.lean,Mathlib/Analysis/Normed/Unbundled/InvariantExtension.lean,Mathlib/Analysis/SpecialFunctions/Complex/CircleAddChar.lean,Mathlib/Combinatorics/Configuration.lean,Mathlib/Combinatorics/SimpleGraph/AdjMatrix.lean,Mathlib/Combinatorics/SimpleGraph/LapMatrix.lean,Mathlib/Data/Matrix/Block.lean,Mathlib/Data/Matrix/ConjTranspose.lean,Mathlib/Data/Matrix/Hadamard.lean,Mathlib/Data/Matrix/Mul.lean,Mathlib/Data/Matrix/Notation.lean,Mathlib/Data/Matrix/Reflection.lean,Mathlib/Data/Matrix/RowCol.lean,Mathlib/Data/Matrix/Vec.lean,Mathlib/FieldTheory/PurelyInseparable/PerfectClosure.lean,Mathlib/Geometry/Manifold/GroupLieAlgebra.lean,Mathlib/GroupTheory/Coxeter/Matrix.lean,Mathlib/LinearAlgebra/CrossProduct.lean,Mathlib/LinearAlgebra/Matrix/BilinearForm.lean,Mathlib/LinearAlgebra/Matrix/DotProduct.lean,Mathlib/LinearAlgebra/Matrix/Nondegenerate.lean,Mathlib/LinearAlgebra/Matrix/Orthogonal.lean,Mathlib/LinearAlgebra/Matrix/PosDef.lean,Mathlib/LinearAlgebra/Matrix/SchurComplement.lean,Mathlib/LinearAlgebra/Matrix/SesquilinearForm.lean,Mathlib/LinearAlgebra/Matrix/Trace.lean,Mathlib/LinearAlgebra/Multilinear/Basic.lean,Mathlib/LinearAlgebra/PerfectPairing/Matrix.lean,Mathlib/LinearAlgebra/Projectivization/Constructions.lean,Mathlib/NumberTheory/NumberField/ProductFormula.lean,Mathlib/NumberTheory/SiegelsLemma.lean,Mathlib/RingTheory/DividedPowers/SubDPIdeal.lean,Mathlib/SetTheory/Ordinal/Veblen.lean,Mathlib/Topology/Algebra/Module/Equiv.lean,Mathlib/Topology/Homeomorph/Lemmas.lean,Mathlib/Topology/Instances/Matrix.lean,scripts/bench_summary.lean 49 5 ['eric-wieser', 'github-actions', 'grunweg', 'leanprover-community-bot-assistant'] nobody
272-60513
8 months ago
295-36435
295 days ago
7-54661
7 days
28042 kckennylau
author:kckennylau
 feat(Topology/ValuativeRel): a topological basis indexed by pairs of elements --- The pullback PR of #27314 and #27163. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-ring-theory 140/23 Mathlib/RingTheory/Valuation/ValuativeRel.lean,Mathlib/Topology/Algebra/Valued/ValuativeRel.lean 2 3 ['github-actions', 'grunweg', 'mathlib4-merge-conflict-bot'] nobody
272-60467
8 months ago
282-25511
282 days ago
7-4998
7 days
23966 astrainfinita
author:astrainfinita
 refactor: unbundle algebra from `{Seminormed, Normed}(Add)(Comm)Group` --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) - [ ] depends on: #23621 - [ ] depends on: #23961 t-algebra blocked-by-other-PR merge-conflict slow-typeclass-synthesis t-analysis
label:t-algebra$
 3233/2752 Archive/Imo/Imo1998Q2.lean,Counterexamples/LinearOrderWithPosMulPosEqZero.lean,Mathlib/Algebra/Module/ZLattice/Basic.lean,Mathlib/Algebra/Module/ZLattice/Covolume.lean,Mathlib/Algebra/Order/Field/Canonical.lean,Mathlib/Algebra/Order/Field/Rat.lean,Mathlib/Algebra/Order/Floor/Ring.lean,Mathlib/Algebra/Order/GroupWithZero/Canonical.lean,Mathlib/Algebra/Order/GroupWithZero/Finset.lean,Mathlib/Algebra/Order/Hom/Monoid.lean,Mathlib/Algebra/Order/Nonneg/Field.lean,Mathlib/Algebra/Order/Nonneg/Ring.lean,Mathlib/Algebra/Order/Ring/Nat.lean,Mathlib/Analysis/Analytic/Basic.lean,Mathlib/Analysis/Analytic/CPolynomial.lean,Mathlib/Analysis/Analytic/CPolynomialDef.lean,Mathlib/Analysis/Analytic/ChangeOrigin.lean,Mathlib/Analysis/Analytic/Composition.lean,Mathlib/Analysis/Analytic/Constructions.lean,Mathlib/Analysis/Analytic/Inverse.lean,Mathlib/Analysis/Analytic/IsolatedZeros.lean,Mathlib/Analysis/Analytic/IteratedFDeriv.lean,Mathlib/Analysis/Analytic/Linear.lean,Mathlib/Analysis/Analytic/Order.lean,Mathlib/Analysis/Analytic/Polynomial.lean,Mathlib/Analysis/Analytic/RadiusLiminf.lean,Mathlib/Analysis/Analytic/Uniqueness.lean,Mathlib/Analysis/Analytic/Within.lean,Mathlib/Analysis/Asymptotics/AsymptoticEquivalent.lean,Mathlib/Analysis/Asymptotics/Defs.lean,Mathlib/Analysis/Asymptotics/Lemmas.lean,Mathlib/Analysis/Asymptotics/SpecificAsymptotics.lean,Mathlib/Analysis/Asymptotics/TVS.lean,Mathlib/Analysis/Asymptotics/Theta.lean,Mathlib/Analysis/BoundedVariation.lean,Mathlib/Analysis/BoxIntegral/Basic.lean,Mathlib/Analysis/BoxIntegral/DivergenceTheorem.lean,Mathlib/Analysis/BoxIntegral/Integrability.lean,Mathlib/Analysis/BoxIntegral/Partition/Additive.lean,Mathlib/Analysis/BoxIntegral/Partition/Measure.lean,Mathlib/Analysis/CStarAlgebra/Basic.lean,Mathlib/Analysis/CStarAlgebra/CStarMatrix.lean,Mathlib/Analysis/CStarAlgebra/ContinuousLinearMap.lean,Mathlib/Analysis/CStarAlgebra/Matrix.lean,Mathlib/Analysis/CStarAlgebra/Module/Constructions.lean,Mathlib/Analysis/CStarAlgebra/Module/Defs.lean,Mathlib/Analysis/Calculus/AddTorsor/AffineMap.lean,Mathlib/Analysis/Calculus/AddTorsor/Coord.lean,Mathlib/Analysis/Calculus/BumpFunction/Basic.lean,Mathlib/Analysis/Calculus/BumpFunction/Convolution.lean,Mathlib/Analysis/Calculus/BumpFunction/FiniteDimension.lean,Mathlib/Analysis/Calculus/BumpFunction/InnerProduct.lean,Mathlib/Analysis/Calculus/BumpFunction/Normed.lean,Mathlib/Analysis/Calculus/Conformal/InnerProduct.lean,Mathlib/Analysis/Calculus/Conformal/NormedSpace.lean,Mathlib/Analysis/Calculus/ContDiff/Basic.lean,Mathlib/Analysis/Calculus/ContDiff/Bounds.lean,Mathlib/Analysis/Calculus/ContDiff/CPolynomial.lean,Mathlib/Analysis/Calculus/ContDiff/Defs.lean,Mathlib/Analysis/Calculus/ContDiff/FTaylorSeries.lean,Mathlib/Analysis/Calculus/ContDiff/FaaDiBruno.lean,Mathlib/Analysis/Calculus/ContDiff/FiniteDimension.lean,Mathlib/Analysis/Calculus/ContDiff/Operations.lean,Mathlib/Analysis/Calculus/ContDiff/RCLike.lean,Mathlib/Analysis/Calculus/ContDiff/WithLp.lean,Mathlib/Analysis/Calculus/DSlope.lean,Mathlib/Analysis/Calculus/Deriv/Abs.lean,Mathlib/Analysis/Calculus/Deriv/Add.lean,Mathlib/Analysis/Calculus/Deriv/AffineMap.lean,Mathlib/Analysis/Calculus/Deriv/Basic.lean,Mathlib/Analysis/Calculus/Deriv/Comp.lean,Mathlib/Analysis/Calculus/Deriv/Inv.lean,Mathlib/Analysis/Calculus/Deriv/Inverse.lean,Mathlib/Analysis/Calculus/Deriv/Linear.lean,Mathlib/Analysis/Calculus/Deriv/Mul.lean,Mathlib/Analysis/Calculus/Deriv/Prod.lean,Mathlib/Analysis/Calculus/Deriv/Shift.lean,Mathlib/Analysis/Calculus/Deriv/Slope.lean,Mathlib/Analysis/Calculus/Deriv/Star.lean,Mathlib/Analysis/Calculus/Deriv/Support.lean,Mathlib/Analysis/Calculus/Deriv/ZPow.lean,Mathlib/Analysis/Calculus/DiffContOnCl.lean,Mathlib/Analysis/Calculus/FDeriv/Add.lean,Mathlib/Analysis/Calculus/FDeriv/Analytic.lean,Mathlib/Analysis/Calculus/FDeriv/Basic.lean,Mathlib/Analysis/Calculus/FDeriv/Bilinear.lean,Mathlib/Analysis/Calculus/FDeriv/Comp.lean,Mathlib/Analysis/Calculus/FDeriv/Equiv.lean,Mathlib/Analysis/Calculus/FDeriv/Extend.lean,Mathlib/Analysis/Calculus/FDeriv/Linear.lean,Mathlib/Analysis/Calculus/FDeriv/Measurable.lean,Mathlib/Analysis/Calculus/FDeriv/Mul.lean,Mathlib/Analysis/Calculus/FDeriv/Norm.lean,Mathlib/Analysis/Calculus/FDeriv/Pi.lean,Mathlib/Analysis/Calculus/FDeriv/Prod.lean,Mathlib/Analysis/Calculus/FDeriv/RestrictScalars.lean,Mathlib/Analysis/Calculus/FDeriv/Star.lean,Mathlib/Analysis/Calculus/FDeriv/Symmetric.lean,Mathlib/Analysis/Calculus/FDeriv/WithLp.lean,Mathlib/Analysis/Calculus/FormalMultilinearSeries.lean 579 7 ['astrainfinita', 'github-actions', 'leanprover-bot', 'leanprover-community-bot-assistant', 'mathlib4-dependent-issues-bot'] nobody
272-35734
8 months ago
unknown
0-0
0 seconds
27399 MoritzBeroRoos
author:MoritzBeroRoos
 chore: replace every usage of ⬝ᵥ (with old \cdot) by ·ᵥ (with \centerdot) Discussion at [zulip](https://leanprover.zulipchat.com/#narrow/channel/270676-lean4/topic/.5Ccdot.20!.3D.20.5Ccenterdot). Currently the abbreviations `\cdot` and `\centerdot` resolve to different, with the naked eye nearly undistinguishable symbols (despite the c in cdot surely standing for `center`..): - `\cdot` gives ⬝ [U+2B1D](https://www.compart.com/en/unicode/U+2B1D) "Black Very Small Square" - `\centerdot` gives · [U+00B7](https://www.compart.com/en/unicode/U+00B7) "Middle Dot" Mathlib mostly uses the `\centerdot` variant, except for the dotProduct notation and some probably unsuspecting people wanting \centerdot but getting \cdot in their comments and 6 uses of a notation using the raw `\cdot` without any subscript at `Mathlib\Topology\Homotopy\Product.lean`. This PR replaces the dot product `⬝ᵥ` with its `\centerdot` counterpart `·ᵥ`. The related PR [here](https://github.com/leanprover/vscode-lean4/pull/639) can then overwrite the `\cdot` abbreviation, to produce the same symbol as the `centerdot` abbreviation does. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict new-contributor 133/133 Mathlib/Analysis/CStarAlgebra/CStarMatrix.lean,Mathlib/Analysis/InnerProductSpace/PiL2.lean,Mathlib/Combinatorics/Configuration.lean,Mathlib/Combinatorics/SimpleGraph/AdjMatrix.lean,Mathlib/Combinatorics/SimpleGraph/LapMatrix.lean,Mathlib/Data/Matrix/Block.lean,Mathlib/Data/Matrix/ConjTranspose.lean,Mathlib/Data/Matrix/Hadamard.lean,Mathlib/Data/Matrix/Mul.lean,Mathlib/Data/Matrix/Notation.lean,Mathlib/Data/Matrix/Reflection.lean,Mathlib/Data/Matrix/RowCol.lean,Mathlib/Data/Matrix/Vec.lean,Mathlib/LinearAlgebra/CrossProduct.lean,Mathlib/LinearAlgebra/Matrix/BilinearForm.lean,Mathlib/LinearAlgebra/Matrix/DotProduct.lean,Mathlib/LinearAlgebra/Matrix/Nondegenerate.lean,Mathlib/LinearAlgebra/Matrix/Orthogonal.lean,Mathlib/LinearAlgebra/Matrix/PosDef.lean,Mathlib/LinearAlgebra/Matrix/SchurComplement.lean,Mathlib/LinearAlgebra/Matrix/SesquilinearForm.lean,Mathlib/LinearAlgebra/Matrix/Trace.lean,Mathlib/LinearAlgebra/PerfectPairing/Matrix.lean,Mathlib/LinearAlgebra/Projectivization/Constructions.lean,Mathlib/Topology/Instances/Matrix.lean 25 6 ['MoritzBeroRoos', 'eric-wieser', 'github-actions', 'leanprover-community-bot-assistant'] nobody
272-22345
8 months ago
295-36436
295 days ago
7-62439
7 days
27479 iu-isgood
author:iu-isgood
 feat: Abel's Binomial Theorem We have formalized Abel's Binomial Theorem as part of an REU project. There are a few remaining sorrys, but we will finish them soon. I will edit this PR message later according to community rules. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) awaiting-author t-data new-contributor 326/0 Mathlib/Data/Nat/Choose/AbelBinomial.lean 1 28 ['ElifUskuplu', 'FrankieNC', 'github-actions', 'iu-isgood'] nobody
272-22106
8 months ago
301-19803
301 days ago
0-237
3 minutes
28787 alreadydone
author:alreadydone
 feat(Counterexamples): a domain whose ring of differences is not a domain Example produced by Gemini 2.5 Pro: https://gemini.google.com/share/9558539e1309 --- - [ ] depends on: #28468 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-algebra blocked-by-other-PR large-import
label:t-algebra$
 1200/204 Counterexamples.lean,Counterexamples/GrothendieckAddGroupIsDomain.lean,Mathlib.lean,Mathlib/Algebra/Group/Subsemigroup/Defs.lean,Mathlib/Algebra/Module/End.lean,Mathlib/Algebra/Module/LocalizedModule/IsLocalization.lean,Mathlib/Algebra/Order/Nonneg/Basic.lean,Mathlib/Algebra/Order/Nonneg/Ring.lean,Mathlib/Algebra/Ring/Invertible.lean,Mathlib/GroupTheory/MonoidLocalization/Archimedean.lean,Mathlib/GroupTheory/MonoidLocalization/Basic.lean,Mathlib/GroupTheory/MonoidLocalization/Lemmas.lean,Mathlib/GroupTheory/MonoidLocalization/MonoidWithZero.lean,Mathlib/LinearAlgebra/TensorProduct/Basic.lean,Mathlib/RingTheory/IsTensorProduct.lean,Mathlib/RingTheory/Localization/Additive.lean,Mathlib/RingTheory/Localization/Away/Basic.lean,Mathlib/RingTheory/Localization/Basic.lean,Mathlib/RingTheory/Localization/Defs.lean,Mathlib/RingTheory/Localization/Ideal.lean,Mathlib/RingTheory/Localization/StrongRankCondition.lean,Mathlib/RingTheory/Smooth/StandardSmooth.lean,Mathlib/RingTheory/Trace/Quotient.lean 23 6 ['alreadydone', 'github-actions', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot', 'riccardobrasca'] nobody
271-25556
8 months ago
271-31000
271 days ago
1-13263
1 day
24719 madvorak
author:madvorak
 feat(LinearAlgebra/Matrix/NonsingularInverse): inverting `Matrix` inverts its `LinearEquiv` --- Discussion: https://leanprover.zulipchat.com/#narrow/channel/144837-PR-reviews/topic/.2324719.20cannot.20find.20home/with/517142655 awaiting-author t-algebra
label:t-algebra$
 10/0 Mathlib/LinearAlgebra/Matrix/NonsingularInverse.lean 1 16 ['eric-wieser', 'github-actions', 'madvorak', 'ocfnash'] nobody
269-47043
8 months ago
291-29020
291 days ago
86-37603
86 days
27437 kckennylau
author:kckennylau
 feat(RingTheory/Valuation): some lemmas about comparing with 1 and 0 and with each other *From the 2025 Local Class Field Theory Workshop.* --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict WIP t-ring-theory 109/22 Mathlib/NumberTheory/Padics/ValuativeRel.lean,Mathlib/RingTheory/Valuation/Basic.lean,Mathlib/RingTheory/Valuation/Extension.lean,Mathlib/RingTheory/Valuation/ValuativeRel.lean 4 20 ['erdOne', 'github-actions', 'kckennylau', 'mathlib4-merge-conflict-bot', 'matthewjasper', 'pechersky'] nobody
268-24926
8 months ago
287-75937
287 days ago
14-27134
14 days
28148 kckennylau
author:kckennylau
 feat(Matrix): Simproc and Rw-proc for Matrix Transpose Co-authored by Aaron Liu. ```lean example : !![1, 2, 3; 4, 5, 6]ᵀ = !![1, 4; 2, 5; 3, 6] := by rw [transpose_of% 2 3] example : !![1, 2, 3; 4, 5, 6]ᵀ = !![1, 4; 2, 5; 3, 6] := by rw [transpose_of] example : !![1, 2, 3; 4, 5, 6]ᵀ = !![1, 4; 2, 5; 3, 6] := by simp only [matrix_transpose] ``` --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-meta 267/8 Mathlib.lean,Mathlib/Data/Matrix/Notation.lean,Mathlib/LinearAlgebra/UnitaryGroup.lean,Mathlib/Tactic.lean,Mathlib/Tactic/Simproc/Matrix.lean,MathlibTest/Simproc/Matrix.lean,MathlibTest/matrix.lean,scripts/noshake.json 8 32 ['eric-wieser', 'github-actions', 'kckennylau', 'mathlib4-merge-conflict-bot', 'plp127'] eric-wieser
assignee:eric-wieser
267-65679
8 months ago
267-65680
267 days ago
12-78143
12 days
28686 mitchell-horner
author:mitchell-horner
 feat(Combinatorics/SimpleGraph): prove the Erdős-Stone theorem Proves the Erdős-Stone theorem: If `G` has at least `(1 - 1 / r + o(1)) * n ^ 2 / 2` many edges, then `G` contains a copy of a `completeEquipartiteGraph (r + 1) t`. --- - [ ] depends on: #28685 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) blocked-by-other-PR t-combinatorics merge-conflict WIP 757/14 Mathlib.lean,Mathlib/Combinatorics/SimpleGraph/Extremal/ErdosStoneSimonovits.lean 10 3 ['github-actions', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
267-29119
8 months ago
275-46062
275 days ago
0-10
10 seconds
28687 mitchell-horner
author:mitchell-horner
 feat(Combinatorics/SimpleGraph): prove the Erdős-Stone-Simonovits theorem Proves the Erdős-Stone-Simonovits theorem: If the chromatic number of `H` equals `r + 1 > 0`, then the `extremalNumber` of `H` is greater than `(1 - 1 / r - o(1)) * card V ^ 2 / 2` and at most `(1 - 1 / r + o(1)) * card V ^ 2 / 2`. --- - [ ] depends on: #28686 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict WIP blocked-by-other-PR t-combinatorics 879/14 Mathlib.lean,Mathlib/Combinatorics/SimpleGraph/Bipartite.lean,Mathlib/Combinatorics/SimpleGraph/CompleteMultipartite.lean,Mathlib/Combinatorics/SimpleGraph/Extremal/Basic.lean,Mathlib/Combinatorics/SimpleGraph/Extremal/ErdosStoneSimonovits.lean,Mathlib/Combinatorics/SimpleGraph/Finite.lean,Mathlib/Combinatorics/SimpleGraph/Maps.lean,Mathlib/Combinatorics/SimpleGraph/Operations.lean,Mathlib/Data/Finset/Union.lean,Mathlib/Data/Nat/Cast/Order/Field.lean 10 3 ['github-actions', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
267-29118
8 months ago
275-45877
275 days ago
0-32
32 seconds
28689 mitchell-horner
author:mitchell-horner
 feat(Combinatorics/SimpleGraph): prove well-known corollaries of the Erdős-Stone-Simonovits theorem Proves well-known corollaries of the Erdős-Stone-Simonovits theorem: E.g., if the chromatic number of `H` equals `r + 1 > 1`, then `extremalNumber n H` is asymptotically equivalent to `(1 - 1 / r) * n.choose 2` as `n → ∞` --- - [ ] depends on: #28687 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict WIP blocked-by-other-PR t-combinatorics 958/14 Mathlib.lean,Mathlib/Combinatorics/SimpleGraph/Bipartite.lean,Mathlib/Combinatorics/SimpleGraph/CompleteMultipartite.lean,Mathlib/Combinatorics/SimpleGraph/Extremal/Basic.lean,Mathlib/Combinatorics/SimpleGraph/Extremal/ErdosStoneSimonovits.lean,Mathlib/Combinatorics/SimpleGraph/Finite.lean,Mathlib/Combinatorics/SimpleGraph/Maps.lean,Mathlib/Combinatorics/SimpleGraph/Operations.lean,Mathlib/Data/Finset/Union.lean,Mathlib/Data/Nat/Cast/Order/Field.lean 10 3 ['github-actions', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
267-29117
8 months ago
275-45651
275 days ago
0-45
45 seconds
26952 robin-carlier
author:robin-carlier
 feat(CategoryTheory/DayConvolution): monoid objects internal to day convolutions In this file, given `F : C ⊛⥤ V`, we provide a bijective correspondence between lax monoidal structures on `F.functor` and `Mon_Class F` structures. We also prove that through this correspondance, monoidal natural transformations correspond to morphisms of internal monoid objects. --- - [ ] depends on: #26890 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict blocked-by-other-PR t-category-theory 1574/19 Mathlib.lean,Mathlib/CategoryTheory/Functor/KanExtension/Basic.lean,Mathlib/CategoryTheory/Monoidal/DayConvolution.lean,Mathlib/CategoryTheory/Monoidal/DayConvolution/DayFunctor.lean,Mathlib/CategoryTheory/Monoidal/DayConvolution/Mon_.lean 5 5 ['github-actions', 'leanprover-community-bot-assistant', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
267-1328
8 months ago
316-82811
316 days ago
0-584
9 minutes
27133 robin-carlier
author:robin-carlier
 feat(CategoryTheory/Monoidal/DayConvolution): `C ⊛⥤ V` is monoidal closed when `V` is When `V` is a monoidal closed category admitting enough limits, we show that the type alias `C ⊛⥤ V` for functors `C ⥤ V` with Day convolution monoidal structure is monoidal closed using the API for `LawfulDayConvolutionClosedMonoidalCategoryStruct` developped in #27119. We expose the required data to exhibit (realization as a functor of) the internal hom as a suitable, and we port the lemmas that characterize its functoriality in that regard, as well as the evaluation and coevaluation morphisms. --- - [ ] depends on: #27119 - [ ] depends on: #26890 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict blocked-by-other-PR t-category-theory 1706/20 Mathlib.lean,Mathlib/CategoryTheory/Functor/KanExtension/Basic.lean,Mathlib/CategoryTheory/Monoidal/DayConvolution.lean,Mathlib/CategoryTheory/Monoidal/DayConvolution/Closed.lean,Mathlib/CategoryTheory/Monoidal/DayConvolution/DayFunctor.lean 5 6 ['github-actions', 'leanprover-community-bot-assistant', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
267-1203
8 months ago
312-27657
312 days ago
0-1192
19 minutes
27151 robin-carlier
author:robin-carlier
 feat(CategoryTheory/Monoidal/DayConvolution): `C ⊛⥤ V` is braided/symmetric when `C` and `V` are braided/symmetric We use the machinery from #27150 to show that Day functors (the type alias for functors endowed with the Day convolution monoidal structure) are braided/symmetric when the base categories are. --- - [ ] depends on: #27150 - [ ] depends on: #26890 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict blocked-by-other-PR t-category-theory 1591/20 Mathlib.lean,Mathlib/CategoryTheory/Functor/KanExtension/Basic.lean,Mathlib/CategoryTheory/Monoidal/DayConvolution.lean,Mathlib/CategoryTheory/Monoidal/DayConvolution/Braided.lean,Mathlib/CategoryTheory/Monoidal/DayConvolution/DayFunctor.lean 5 5 ['github-actions', 'leanprover-community-bot-assistant', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
267-1201
8 months ago
311-48150
311 days ago
0-1022
17 minutes
27175 robin-carlier
author:robin-carlier
 feat(CategoryTheory/Monoidal/DayConvolution): `LawfulDayConvolutionMonoidalCategoryStruct.ι C V D` is monoidal when the target is `C ⊛⥤ V` We prove a "soundness" result for our notion of `LawfulDayConvolutionMonoidalCategoryStruct`, i.e that when be interpret its field `ι` as valued in Day functors (the type alias for functors endowed with the Day convolution monoidal structure), the data from `LawfulDayConvolutionMonoidalCategoryStruct` turn `ι` in a monoidal functor, proving that the categories endowed with such a structure are precisely those that can be identified to monoidal (not necessarily full) subcategories of Day functors. Implicitly, the structure isomorphisms for this monoidal structure bundle isomorphisms asserting unicity up to isomorphisms of day convolutions. --- - [ ] depends on: #26890 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict blocked-by-other-PR t-category-theory 1585/24 Mathlib.lean,Mathlib/CategoryTheory/Functor/KanExtension/Basic.lean,Mathlib/CategoryTheory/Monoidal/DayConvolution.lean,Mathlib/CategoryTheory/Monoidal/DayConvolution/DayFunctor.lean 4 5 ['github-actions', 'leanprover-community-bot-assistant', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
267-1200
8 months ago
311-15282
311 days ago
0-673
11 minutes
26097 adomani
author:adomani
 dev: the relative linter --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict WIP awaiting-author t-linter 316/0 Mathlib.lean,Mathlib/Tactic.lean,Mathlib/Tactic/Linter/Local.lean,Mathlib/Util/ParseGit.lean 4 2 ['github-actions', 'mathlib4-merge-conflict-bot'] nobody
266-64375
8 months ago
unknown
0-0
0 seconds
25741 robin-carlier
author:robin-carlier
 feat(AlgebraicTopology/SimplexCategory/SimplicialObject): definitions of simplicial objects by generators and relation We leverage the equivalence between `SimplexCategory` and `SimplexCategoryGenRel` to give new constructors for (co)simplicial objects, as well as constructors for natural transformations (resp. isomorphism) between those. Final PR in the series of PR formalising the equivalence between `SimplexCategory` and `SimplexCategoryGenRel`. --- - [ ] depends on: #25740 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) --- *This PR continues the work from #21748.* *Original PR: https://github.com/leanprover-community/mathlib4/pull/21748* t-algebraic-topology blocked-by-other-PR t-category-theory large-import merge-conflict 1363/9 Mathlib.lean,Mathlib/AlgebraicTopology/SimplexCategory/GeneratorsRelations/Equivalence.lean,Mathlib/AlgebraicTopology/SimplexCategory/GeneratorsRelations/NormalForms.lean,Mathlib/AlgebraicTopology/SimplicialObject/GeneratorsRelations.lean 4 3 ['github-actions', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
263-41395
8 months ago
333-34683
333 days ago
11-15676
11 days
26931 javra
author:javra
 feat(CategoryTheory/Enriched): `V`-enriched isomorphisms Defines isomorphisms in `V`-enriched categories and relate them to ordinary isomorphisms in the case of ordinary enriched categories. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict awaiting-author t-category-theory infinity-cosmos 211/14 Mathlib.lean,Mathlib/CategoryTheory/Enriched/Basic.lean,Mathlib/CategoryTheory/Enriched/Iso.lean,Mathlib/CategoryTheory/Enriched/Opposite.lean,Mathlib/CategoryTheory/Enriched/Ordinary/Basic.lean,Mathlib/CategoryTheory/Enriched/Ordinary/Iso.lean 6 21 ['emilyriehl', 'github-actions', 'javra', 'joelriou', 'mathlib4-merge-conflict-bot', 'mckoen'] nobody
263-40785
8 months ago
297-45032
297 days ago
19-74885
19 days
27707 FLDutchmann
author:FLDutchmann
 feat(NumberTheory/SelbergSieve): define Selberg's weights and prove basic results. This PR continues the work from #23635. Original PR: https://github.com/leanprover-community/mathlib4/pull/23635 - [ ] depends on: #27702 merge-conflict t-number-theory blocked-by-other-PR t-analysis 407/83 Mathlib/NumberTheory/Divisors.lean,Mathlib/NumberTheory/SelbergSieve.lean 2 3 ['github-actions', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
263-8045
8 months ago
292-78124
292 days ago
1-28956
1 day
25208 erdOne
author:erdOne
 feat(LinearAlgebra): `tensor_induction` macro --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict WIP t-algebra RFC
label:t-algebra$
 87/116 Mathlib/Algebra/Category/ModuleCat/ChangeOfRings.lean,Mathlib/Algebra/Central/TensorProduct.lean,Mathlib/LinearAlgebra/DirectSum/Finsupp.lean,Mathlib/LinearAlgebra/TensorProduct/Basic.lean,Mathlib/RingTheory/Flat/Equalizer.lean,Mathlib/RingTheory/TensorProduct/Basic.lean,Mathlib/RingTheory/TensorProduct/Finite.lean,Mathlib/RingTheory/Unramified/Finite.lean 8 8 ['chrisflav', 'eric-wieser', 'github-actions', 'leanprover-bot', 'mathlib4-merge-conflict-bot'] nobody
262-62152
8 months ago
361-33599
361 days ago
0-600
10 minutes
28803 astrainfinita
author:astrainfinita
 refactor: unbundle algebra from `ENormed*` Further speed up the search in the algebraic typeclass hierarchy by avoiding searching for `TopologicalSpace`. This PR continues the work from #23961. - Change `ESeminormed(Add)Monoid` and `ENormed(Add)Monoid` so they no longer carry algebraic data. - Deprecate `ESeminormed(Add)CommMonoid` and `ENormed(Add)CommMonoid` in favor of `ESeminormed(Add)Monoid` and `ENormed(Add)Monoid` with a commutative algebraic typeclass. |Old|New| |---|---| | `[ESeminormed(Add)(Comm)Monoid E]` | `[(Add)(Comm)Monoid E] [ESeminormed(Add)Monoid E]` | | `[ENormed(Add)(Comm)Monoid]` | `[(Add)(Comm)Monoid E] [ENormed(Add)Monoid]` | See [Zulip discussion](https://leanprover.zulipchat.com/#narrow/channel/144837-PR-reviews/topic/.2328803.20refactor.3A.20unbundle.20algebra.20from.20.60ENormed*.60/with/536024350) ------------ - [x] depends on: #28813 t-algebra merge-conflict slow-typeclass-synthesis awaiting-zulip t-analysis
label:t-algebra$
 80/63 Mathlib/Analysis/CStarAlgebra/CStarMatrix.lean,Mathlib/Analysis/Normed/Group/Basic.lean,Mathlib/Analysis/Normed/Group/Continuity.lean,Mathlib/Analysis/Normed/Group/InfiniteSum.lean,Mathlib/Analysis/NormedSpace/IndicatorFunction.lean,Mathlib/MeasureTheory/Function/L1Space/AEEqFun.lean,Mathlib/MeasureTheory/Function/L1Space/HasFiniteIntegral.lean,Mathlib/MeasureTheory/Function/L1Space/Integrable.lean,Mathlib/MeasureTheory/Function/LocallyIntegrable.lean,Mathlib/MeasureTheory/Function/LpSeminorm/Basic.lean,Mathlib/MeasureTheory/Function/LpSeminorm/CompareExp.lean,Mathlib/MeasureTheory/Function/LpSeminorm/TriangleInequality.lean,Mathlib/MeasureTheory/Integral/IntegrableOn.lean,Mathlib/MeasureTheory/Integral/IntervalIntegral/Basic.lean 14 28 ['astrainfinita', 'bryangingechen', 'github-actions', 'grunweg', 'kbuzzard', 'leanprover-bot', 'leanprover-community-mathlib4-bot', 'mathlib-bors', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot', 'sgouezel'] grunweg
assignee:grunweg
261-79680
8 months ago
270-30834
270 days ago
0-20585
5 hours
26935 Paul-Lez
author:Paul-Lez
 feat(Analysis/SpecialFunction/NthRoot): definition and basic API of Real.nthRoot This PR continues the work from #25364. Original PR: https://github.com/leanprover-community/mathlib4/pull/25364 Co-authored-by: Eric Wieser t-analysis 311/0 Mathlib/Analysis/SpecialFunctions/NthRoot.lean 1 10 ['Paul-Lez', 'eric-wieser', 'github-actions', 'mo271', 'smmercuri', 'yury-harmonic'] nobody
260-81790
8 months ago
316-42160
316 days ago
0-74776
20 hours
27995 kckennylau
author:kckennylau
 feat(RingTheory/Valuation): alternate constructors for Valuation --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-ring-theory awaiting-CI 82/0 Mathlib/Algebra/GroupWithZero/WithZero.lean,Mathlib/FieldTheory/RatFunc/Degree.lean,Mathlib/NumberTheory/Padics/PadicNumbers.lean,Mathlib/RingTheory/Valuation/Basic.lean 4 22 ['YaelDillies', 'github-actions', 'grunweg', 'kckennylau', 'pechersky'] nobody
259-53665
8 months ago
272-25119
272 days ago
17-72481
17 days
26159 upobir
author:upobir
 feat(Algebra/QuadraticDiscriminant): Adding inequalities on quadratic from inequalities on discriminant This PR continues the work from #24517. Original PR: https://github.com/leanprover-community/mathlib4/pull/24517 --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) awaiting-author t-algebra
label:t-algebra$
 34/0 Mathlib/Algebra/QuadraticDiscriminant.lean 1 8 ['chrisflav', 'github-actions', 'tb65536', 'upobir'] chrisflav
assignee:chrisflav
258-26569
8 months ago
282-18097
282 days ago
55-10605
55 days
26908 robin-carlier
author:robin-carlier
 feat(CategoryTheory/Monoidal/DayConvolution): alternative ext principle for unitors Currently, our infrastructure for left/right unitors for Day convolution of functors `C ⥤ V` do not have satisfactory extensionality principle: the current way to characterize morphisms out of `U ⊛ F` is the default extensionality principle for Day convolution, which characterizes first such functors via functors out of `U ⊠ F`. Left unitors are then obtained using the fact `U ⊠ F` is a left Kan extension of a functor from `PUnit × C` (which is equivalent to `C`) but we did not record on its own this principle. Using the transitivity of left Kan extensions proved in #26899, we directly exhibit `U ⊛ F` as a left Kan extension of `F ⋙ tensorLeft (𝟙_ V)` along `tensorLeft (𝟙_ C)`. The unit of this Kan extension is composed exactly of the morphisms that appear in the [characterization of left unitors](https://leanprover-community.github.io/mathlib4_docs/Mathlib/CategoryTheory/Monoidal/DayConvolution.html#CategoryTheory.MonoidalCategory.DayConvolutionUnit.leftUnitor_hom_unit_app). We also slightly generalize the instances that express that external products with unitors are left Kan extensions, so that they can be used when taking external products with more complicated functors than currently. This is again useful when chaining extensionality lemmas for morphisms out of terms of the form `(F ⊛ U) ⊛ G`. We prove a similar thing for right unitors With this, it should be possible to have a much more satisfactory way of working with Day convolutions: this allows to "elimiinate" units without ending up with terms in an external product. --- - [ ] depends on: #26899 - [ ] depends on: #26906 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-category-theory 307/18 Mathlib/CategoryTheory/Functor/KanExtension/Basic.lean,Mathlib/CategoryTheory/Monoidal/DayConvolution.lean 2 4 ['github-actions', 'leanprover-community-bot-assistant', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
256-25625
8 months ago
256-25626
256 days ago
0-1812
30 minutes
27150 robin-carlier
author:robin-carlier
 feat(CategoryTheory/Monoidal/DayConvolution): constructors for braided and symmetric structure on day convolutions monoidal categories Following the pattern in #27119, we give API to construct `BraidedCategory` and `SymmetricCategory` structures on a monoidal category equipped with a `LawfulDayConvolutionMonoidalCategoryStruct`. To achieve this, we introduce an other type class `LawfulDayConvolutionBraidedCategoryStruct` that bundles an associator isomorphism that behaves like the one constructed for functors in #27067. We provide a noncomputable constructor for this typeclass that takes as input fullness of the "realization" functor to a category of functors, and we show that the typeclasses are sufficient to define the desired structures. --- - [x] depends on: #27067 - [x] depends on: #26820 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-category-theory 826/9 Mathlib/CategoryTheory/Monoidal/DayConvolution.lean,Mathlib/CategoryTheory/Monoidal/DayConvolution/Braided.lean 2 5 ['github-actions', 'leanprover-community-bot-assistant', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
256-20664
8 months ago
311-50359
311 days ago
0-1002
16 minutes
26462 PSchwahn
author:PSchwahn
 feat(LinearAlgebra/Projection): add results about inverse of `Submodule.prodEquivOfIsCompl` Add two theorems `Submodule.prodEquivOfIsCompl_symm_apply` and `Submodule.prodEquivOfIsCompl_symm_add`, which are API for `Submodule.prodEquivOfIsCompl`. We believe these theorems are useful; for example, we have used their statements in a [classification formalization project](https://github.com/LieLean/LowDimSolvClassification). Co-authored by: - [Viviana del Barco](https://github.com/vdelbarc) - [Gustavo Infanti](https://github.com/GuQOliveira) - [Exequiel Rivas](https://github.com/erivas) --- I am not sure whether the `prodEquivOfIsCompl_symm_apply` theorem should be tagged with `@[simp]`; this might lead to confluence issues. Opinions are welcome! [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) awaiting-author t-algebra new-contributor
label:t-algebra$
 10/0 Mathlib/LinearAlgebra/Projection.lean 1 7 ['PSchwahn', 'github-actions', 'joelriou', 'kckennylau'] joelriou
assignee:joelriou
255-79874
8 months ago
256-24577
256 days ago
73-43082
73 days
27119 robin-carlier
author:robin-carlier
 feat(CategoryTheory/Monoidal/DayConvolution): constructors for closed monoidal day convolution monoidal structures Following the pattern introduced in #26798 and #26820 and using results of #26879, we introduce a typeclass `LawfulDayConvolutionClosedMonoidalCategoryStruct` that encodes the data needed on a `LawfulDayConvolutionMonoidalCategoryStruct` to define well-behaved internal homs. We give a constructor assuming existence of relevant ends, and prove that this data defines a `MonoidalClosed` instance on the monoidal category structures one can deduce from `LawfulDayConvolutionMonoidalCategoryStruct`. --- - [x] depends on: #27079 - [x] depends on: #27091 - [x] depends on: #26879 - [x] depends on: #26820 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-category-theory 900/9 Mathlib/CategoryTheory/Monoidal/DayConvolution.lean,Mathlib/CategoryTheory/Monoidal/DayConvolution/Closed.lean 2 6 ['github-actions', 'leanprover-community-bot-assistant', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
255-34515
8 months ago
312-55827
312 days ago
0-1
1 second
28623 gilesgshaw
author:gilesgshaw
 feat(Logic/Basic): minor additions and simplification of proofs Add new theorems and simplify proofs. Specifically, we add the family of related theorems `apply_dite_iff_exists`, `apply_dite_iff_forall`, `apply_ite_iff_and` and `apply_ite_iff_or`. For each other 'family' of theorems in the file that is analogous to the above, we do the following - Simplify proofs where possible, e.g. by appealing to the new theorems - Complete the family, if any of the corresponding four are missing - Rename to ensure consistency with the above pattern --- merge-conflict t-logic new-contributor 83/55 Archive/Examples/IfNormalization/Result.lean,Archive/Examples/IfNormalization/WithoutAesop.lean,Mathlib/Algebra/ContinuedFractions/Computation/Translations.lean,Mathlib/Algebra/MvPolynomial/Variables.lean,Mathlib/Algebra/Notation/Indicator.lean,Mathlib/LinearAlgebra/Matrix/Rank.lean,Mathlib/Logic/Basic.lean,Mathlib/MeasureTheory/Measure/WithDensity.lean,Mathlib/SetTheory/Ordinal/Notation.lean 9 12 ['eric-wieser', 'gilesgshaw', 'github-actions', 'mathlib4-merge-conflict-bot', 'plp127'] awainverse
assignee:awainverse
255-28376
8 months ago
255-28377
255 days ago
10-61840
10 days
28804 grunweg
author:grunweg
 feat: a few more tactic linters All analysis passes in this list have been suggested [on zulip](https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/Tactic.20analysis.20framework/with/535766713). --- Untested, so may not work yet. - [ ] depends on: #28802 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict blocked-by-other-PR t-meta 204/26 Mathlib.lean,Mathlib/Tactic.lean,Mathlib/Tactic/TacticAnalysis/Declarations.lean,Mathlib/Tactic/TacticAnalysis/FunProp.lean,Mathlib/Tactic/TacticAnalysis/Misc.lean,MathlibTest/TacticAnalysis2.lean 6 3 ['github-actions', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
254-47940
8 months ago
272-34773
272 days ago
0-705
11 minutes
13036 joelriou
author:joelriou
 feat(CategoryTheory/Sites): under certain conditions, cover preserving functors preserve 1-hypercovers Previously, in order to show that a functor between Grothendieck sites was continuous, it was necessary to show that it was "cover preserving" and "compatible preserving". There were two lemmas which could be used in order to show that a functor was "compatible preserving". Since #13012, the better condition of "1-hypercover preserving" functor was introduced and it implies that the functor is continuous. In this PR, under the same assumptions as in the two lemmas mentionned above, we show that cover preserving functors are 1-hypercover preserving functors. This gives slightly better criteria in order to show that a functor is continuous. --- - [x] depends on: #13004 - [x] depends on: #13011 - [x] depends on: #13012 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict WIP t-category-theory 94/7 Mathlib/CategoryTheory/Sites/Continuous.lean,Mathlib/CategoryTheory/Sites/CoverPreserving.lean,Mathlib/CategoryTheory/Sites/Over.lean,Mathlib/CategoryTheory/Sites/Sieves.lean 4 3 ['github-actions', 'leanprover-community-mathlib4-bot', 'mathlib4-merge-conflict-bot'] nobody
253-84100
8 months ago
733-36632
733 days ago
0-1
1 second
29527 kim-em
author:kim-em
 feat: script for checking Github URLs This adds scripts/check_github_urls.py, which checks for links for closed github issues/prs, and shows the context at the link. Of course, many links are to closed pull requests because the discussion there provides useful context. Not sure how to best filter results. WIP CI 475/0 scripts/README.md,scripts/check_github_urls.py 2 2 ['github-actions', 'kim-em'] nobody
253-73253
8 months ago
253-73998
253 days ago
0-1
1 second
27335 eric-wieser
author:eric-wieser
 chore(Data/List): use simp-normal-form for boolean equalities This replaces `¬(p x = true)` with `p x = false`. It also makes explicit some adjacent `h : p x` spellings for symmetry, but the `= true`s were already implied by the coercion. Zulip: [#lean4 > `h : ¬(b = true)` vs `h : b = false` @ 💬](https://leanprover.zulipchat.com/#narrow/channel/270676-lean4/topic/.60h.20.3A.20.C2.AC.28b.20.3D.20true.29.60.20vs.20.60h.20.3A.20b.20.3D.20false.60/near/529976237) --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-data 38/32 Mathlib/Data/List/DropRight.lean,Mathlib/Data/List/SplitOn.lean,Mathlib/Data/List/TakeWhile.lean 3 3 ['github-actions', 'leanprover-community-bot-assistant', 'mathlib4-merge-conflict-bot'] nobody
253-67742
8 months ago
304-62927
304 days ago
0-19242
5 hours
25778 thefundamentaltheor3m
author:thefundamentaltheor3m
 feat: Monotonicity of `setIntegral` for nonnegative functions This PR makes it easier to prove monotonicity of the Bochner integral on sets for nonnegative functions by removing the stronger assumption required by the general monotonicity lemma that both of the functions being compared must be integrable. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) awaiting-author t-measure-probability new-contributor 8/0 Mathlib/MeasureTheory/Integral/Bochner/Set.lean 1 6 ['RemyDegenne', 'github-actions', 'sgouezel', 'thefundamentaltheor3m'] nobody
253-24098
8 months ago
344-31936
344 days ago
0-11893
3 hours
29484 eric-wieser
author:eric-wieser
 refactor: switch to [] notation for Stream' I'll continue fixing this only if people agree this is a good use of this notation. [#mathlib4 > Changing `Stream.Seq` to use `GetElem` @ 💬](https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/Changing.20.60Stream.2ESeq.60.20to.20use.20.60GetElem.60/near/538548680) --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-data large-import 195/173 Mathlib/Algebra/ContinuedFractions/Basic.lean,Mathlib/Algebra/ContinuedFractions/Computation/Basic.lean,Mathlib/Algebra/ContinuedFractions/Translations.lean,Mathlib/Combinatorics/Hindman.lean,Mathlib/Control/Fix.lean,Mathlib/Control/LawfulFix.lean,Mathlib/Data/Seq/Computation.lean,Mathlib/Data/Seq/Defs.lean,Mathlib/Data/Stream/Defs.lean,Mathlib/Data/Stream/Init.lean,Mathlib/Data/WSeq/Basic.lean,Mathlib/Data/WSeq/Productive.lean 12 2 ['github-actions', 'mathlib4-merge-conflict-bot'] nobody
252-82761
8 months ago
unknown
0-0
0 seconds
22517 j-loreaux
author:j-loreaux
 feat: `ℕ+` powers in semigroups --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict WIP large-import 275/28 Mathlib.lean,Mathlib/Algebra/Group/Defs.lean,Mathlib/Algebra/Group/Ext.lean,Mathlib/Algebra/Group/PNatPowAssoc.lean,Mathlib/Algebra/Group/PPow.lean,Mathlib/Algebra/Group/TypeTags/Basic.lean,Mathlib/Algebra/Ring/Ext.lean,Mathlib/Algebra/Ring/ULift.lean,Mathlib/Data/Num/Lemmas.lean,Mathlib/Data/Real/Basic.lean,Mathlib/Data/ZMod/Defs.lean,Mathlib/LinearAlgebra/LinearPMap.lean,Mathlib/NumberTheory/Dioph.lean,Mathlib/Tactic/ToAdditive/Frontend.lean 14 6 ['eric-wieser', 'github-actions', 'j-loreaux', 'leanprover-bot', 'mattrobball'] nobody
252-1683
8 months ago
445-3264
445 days ago
0-27
27 seconds
29615 eric-wieser
author:eric-wieser
 chore: add a computable shortcut for `AddCommMonoid ℂ` --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-analysis easy 9/1 Mathlib/Analysis/Complex/Basic.lean 1 1 ['github-actions'] nobody
251-42542
8 months ago
251-42625
251 days ago
251-42337
251 days
25069 erdOne
author:erdOne
 feat(EllipticCurve): rational points of singular nodal cubics --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict awaiting-author t-algebraic-geometry 251/0 Mathlib.lean,Mathlib/AlgebraicGeometry/EllipticCurve/Affine/Basic.lean,Mathlib/AlgebraicGeometry/EllipticCurve/Singular/Node.lean 3 14 ['Multramate', 'acmepjz', 'chrisflav', 'erdOne', 'github-actions', 'grunweg', 'mathlib4-merge-conflict-bot'] chrisflav
assignee:chrisflav
250-16884
8 months ago
266-48693
266 days ago
100-20892
100 days
25070 erdOne
author:erdOne
 feat(EllipticCurve): rational points on singular cuspidal cubics --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict awaiting-author t-algebraic-geometry 123/0 Mathlib.lean,Mathlib/AlgebraicGeometry/EllipticCurve/Singular/Cusp.lean 2 12 ['Multramate', 'acmepjz', 'adamtopaz', 'erdOne', 'github-actions', 'kckennylau', 'mathlib4-merge-conflict-bot'] adamtopaz
assignee:adamtopaz
250-16883
8 months ago
276-17847
276 days ago
90-52970
90 days
26670 yu-yama
author:yu-yama
 feat(GroupExtension/Abelian): define `conjClassesEquivH1` This PR continues the work from #21837. Original PR: https://github.com/leanprover-community/mathlib4/pull/21837 merge-conflict awaiting-author t-algebra
label:t-algebra$
 162/5 Mathlib.lean,Mathlib/GroupTheory/GroupExtension/Abelian.lean,Mathlib/GroupTheory/GroupExtension/Basic.lean,Mathlib/GroupTheory/GroupExtension/Defs.lean,docs/references.bib 5 3 ['erdOne', 'github-actions', 'mathlib4-merge-conflict-bot', 'yu-yama'] erdOne
assignee:erdOne
249-45177
8 months ago
274-8555
274 days ago
49-15167
49 days
26154 ADedecker
author:ADedecker
 refactor: add refactored APIs for algebraic filter bases This PR continues the work from #18437. Original PR: https://github.com/leanprover-community/mathlib4/pull/18437 merge-conflict t-topology 651/0 Mathlib.lean,Mathlib/Topology/Algebra/FilterBasis.lean,Mathlib/Topology/Algebra/FilterBasisNew.lean,Mathlib/Topology/Algebra/Nonarchimedean/Bases.lean,Mathlib/Topology/Algebra/Nonarchimedean/BasesNew.lean 5 3 ['ADedecker', 'github-actions', 'mathlib4-merge-conflict-bot'] PatrickMassot
assignee:PatrickMassot
249-40620
8 months ago
249-40621
249 days ago
87-79752
87 days
27024 grunweg
author:grunweg
 feat: Gram-Schmidt orthonormalisation for sections of a vector bundle Add a parametrised version of Gram-Schmidt, for sections of a topological vector bundle with a bundle metric. This will be used to define orthonormal local frames. From the path towards geodesics and the Levi-Civita connection. Co-authored-by: Patrick Massot --- - [x] depends on: #27023 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict awaiting-author t-differential-geometry 279/11 Mathlib.lean,Mathlib/Analysis/InnerProductSpace/GramSchmidtOrtho.lean,Mathlib/Topology/VectorBundle/GramSchmidtOrtho.lean,scripts/noshake.json 4 71 ['faenuccio', 'github-actions', 'grunweg', 'leanprover-community-bot-assistant', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot', 'sgouezel'] sgouezel
assignee:sgouezel
249-31277
8 months ago
281-17407
281 days ago
28-11083
28 days
28580 kmill
author:kmill
 refactor: simplify implementation of `filter_upwards` This PR makes a few changes to `filter_upwards`: - it uses `focus`, which prevents multiGoalLinter from ever blaming the tactics used inside its implementation - it constructs the whole proof syntax and elaborates it at once using `evalTactic` and `refine`, rather than using the lower-level TermElab API, which can lose track of goals - it's written in a way that doesn't require goals to be in some particular order This was motivated by some multiGoalLinter issues I ran into when working on https://github.com/leanprover/lean4/pull/9942 --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-order t-meta 14/16 Mathlib/Order/Filter/Defs.lean 1 2 ['github-actions', 'mathlib4-merge-conflict-bot'] nobody
249-29236
8 months ago
277-63301
277 days ago
0-8809
2 hours
29010 grunweg
author:grunweg
 chore: more tests for field_simp features and edge cases --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) 135/0 MathlibTest/FieldSimp.lean 1 2 ['github-actions', 'mathlib4-merge-conflict-bot'] nobody
248-7080
8 months ago
267-65331
267 days ago
0-69950
19 hours
27937 madvorak
author:madvorak
 feat(Logic/Basic): `congr_heq₂` --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) awaiting-author t-logic 6/0 Mathlib/Logic/Basic.lean 1 8 ['YaelDillies', 'fpvandoorn', 'github-actions', 'madvorak', 'vihdzp'] fpvandoorn
assignee:fpvandoorn
247-43813
8 months ago
273-44598
273 days ago
17-62644
17 days
29741 JovanGerb
author:JovanGerb
 trying #28803 using lean#10178 --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict 1111/718 .github/actionlint.yml,.github/workflows/nightly-docgen.yml,.github/workflows/nightly_detect_failure.yml,.github/workflows/report-grind-regressions.yml,Cache/Requests.lean,Mathlib.lean,Mathlib/Algebra/Field/Rat.lean,Mathlib/Algebra/Homology/ExactSequence.lean,Mathlib/Algebra/Order/Ring/Rat.lean,Mathlib/Algebra/Order/Ring/Unbundled/Rat.lean,Mathlib/Algebra/Polynomial/Bivariate.lean,Mathlib/Algebra/Polynomial/Eval/Defs.lean,Mathlib/Algebra/Polynomial/Eval/SMul.lean,Mathlib/Algebra/Ring/Rat.lean,Mathlib/Analysis/CStarAlgebra/CStarMatrix.lean,Mathlib/Analysis/CStarAlgebra/ContinuousFunctionalCalculus/Instances.lean,Mathlib/Analysis/Normed/Group/Basic.lean,Mathlib/Analysis/Normed/Group/Continuity.lean,Mathlib/Analysis/SpecialFunctions/Log/Summable.lean,Mathlib/CategoryTheory/Monoidal/Braided/Basic.lean,Mathlib/Computability/TMToPartrec.lean,Mathlib/Data/DFinsupp/Notation.lean,Mathlib/Data/FP/Basic.lean,Mathlib/Data/Finsupp/Notation.lean,Mathlib/Data/Int/Bitwise.lean,Mathlib/Data/Int/GCD.lean,Mathlib/Data/NNRat/Defs.lean,Mathlib/Data/Nat/GCD/Basic.lean,Mathlib/Data/Nat/GCD/BigOperators.lean,Mathlib/Data/Nat/PartENat.lean,Mathlib/Data/Nat/Prime/Defs.lean,Mathlib/Data/Rat/Cast/Defs.lean,Mathlib/Data/Rat/Defs.lean,Mathlib/Data/Rat/Floor.lean,Mathlib/Data/Rat/Lemmas.lean,Mathlib/Data/Seq/Basic.lean,Mathlib/Data/UInt.lean,Mathlib/Dynamics/PeriodicPts/Defs.lean,Mathlib/GroupTheory/Perm/Centralizer.lean,Mathlib/Init.lean,Mathlib/Lean/Expr/Rat.lean,Mathlib/Lean/Meta/CongrTheorems.lean,Mathlib/LinearAlgebra/PID.lean,Mathlib/LinearAlgebra/Quotient/Basic.lean,Mathlib/LinearAlgebra/Vandermonde.lean,Mathlib/Logic/Equiv/Prod.lean,Mathlib/NumberTheory/Ostrowski.lean,Mathlib/NumberTheory/Padics/PadicVal/Basic.lean,Mathlib/Order/Defs/LinearOrder.lean,Mathlib/Order/Defs/PartialOrder.lean,Mathlib/Order/Disjoint.lean,Mathlib/Order/Filter/Defs.lean,Mathlib/Probability/Distributions/Pareto.lean,Mathlib/RingTheory/Multiplicity.lean,Mathlib/Tactic.lean,Mathlib/Tactic/CategoryTheory/Reassoc.lean,Mathlib/Tactic/CategoryTheory/Refs.lean,Mathlib/Tactic/DeriveFintype.lean,Mathlib/Tactic/FieldSimp.lean,Mathlib/Tactic/Hint.lean,Mathlib/Tactic/Linarith/Oracle/SimplexAlgorithm/Datatypes.lean,Mathlib/Tactic/Linter/DeprecatedModule.lean,Mathlib/Tactic/Linter/Header.lean,Mathlib/Tactic/Linter/Lint.lean,Mathlib/Tactic/Linter/Style.lean,Mathlib/Tactic/NormNum/GCD.lean,Mathlib/Tactic/StacksAttribute.lean,Mathlib/Tactic/SuppressCompilation.lean,Mathlib/Tactic/ToAdditive/Frontend.lean,Mathlib/Tactic/WLOG.lean,Mathlib/Testing/Plausible/Sampleable.lean,Mathlib/Util/Notation3.lean,Mathlib/Util/ParseCommand.lean,Mathlib/Util/Superscript.lean,MathlibTest/AssertExists.lean,MathlibTest/CalcQuestionMark.lean,MathlibTest/Change.lean,MathlibTest/DeprecateTo.lean,MathlibTest/FieldSimp.lean,MathlibTest/FindSyntax.lean,MathlibTest/LibrarySearch/basic.lean,MathlibTest/LibrarySearch/mathlib.lean,MathlibTest/LibrarySearch/observe.lean,MathlibTest/MinImports.lean,MathlibTest/RewriteSearch/Basic.lean,MathlibTest/RewriteSearch/Polynomial.lean,MathlibTest/StacksAttribute.lean,MathlibTest/Subsingleton.lean,MathlibTest/Use.lean,MathlibTest/Variable.lean,MathlibTest/hint.lean,MathlibTest/lift.lean,MathlibTest/linarith.lean,MathlibTest/notation3.lean,MathlibTest/propose.lean,MathlibTest/renameBvar.lean,MathlibTest/rewrites.lean,MathlibTest/ring.lean,MathlibTest/says.lean,MathlibTest/success_if_fail_with_msg.lean 105 2 ['JovanGerb', 'leanprover-bot'] nobody
247-39422
8 months ago
247-46528
247 days ago
0-15
15 seconds
7125 eric-wieser
author:eric-wieser
 feat: additive monoid structure via biproducts I suspect I'm missing a trick with these transport lemmas. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict WIP t-category-theory awaiting-CI 237/0 Mathlib/CategoryTheory/Limits/Skeleton.lean 1 3 ['alreadydone', 'eric-wieser', 'mathlib4-merge-conflict-bot'] nobody
247-2341
8 months ago
unknown
0-0
0 seconds
27950 alreadydone
author:alreadydone
 feat(MonoidAlgebra): criteria for `single` to be a unit, irreducible or prime --- - [ ] depends on: #27936 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict WIP t-algebra blocked-by-other-PR
label:t-algebra$
 714/192 Mathlib.lean,Mathlib/Algebra/BigOperators/Group/Finset/Basic.lean,Mathlib/Algebra/BigOperators/Group/Finset/Defs.lean,Mathlib/Algebra/BigOperators/Group/Finset/Piecewise.lean,Mathlib/Algebra/BigOperators/Group/List/Lemmas.lean,Mathlib/Algebra/BigOperators/Group/Multiset/Basic.lean,Mathlib/Algebra/Divisibility/Basic.lean,Mathlib/Algebra/Divisibility/Finite.lean,Mathlib/Algebra/Divisibility/Hom.lean,Mathlib/Algebra/Divisibility/Prod.lean,Mathlib/Algebra/Divisibility/Units.lean,Mathlib/Algebra/Group/Action/Pointwise/Finset.lean,Mathlib/Algebra/Group/Irreducible/Lemmas.lean,Mathlib/Algebra/Group/Prod.lean,Mathlib/Algebra/GroupWithZero/Associated.lean,Mathlib/Algebra/MonoidAlgebra/Divisibility.lean,Mathlib/Algebra/MonoidAlgebra/NoZeroDivisors.lean,Mathlib/Algebra/Notation/Defs.lean,Mathlib/Algebra/Prime/Defs.lean,Mathlib/Algebra/Prime/Lemmas.lean,Mathlib/Algebra/Prime/Prod.lean,Mathlib/Data/Nat/Init.lean,Mathlib/Dynamics/PeriodicPts/Defs.lean,Mathlib/GroupTheory/Coset/Card.lean,Mathlib/GroupTheory/Exponent.lean,Mathlib/GroupTheory/GroupAction/Blocks.lean,Mathlib/GroupTheory/GroupAction/Period.lean,Mathlib/GroupTheory/Index.lean,Mathlib/GroupTheory/OrderOfElement.lean,Mathlib/GroupTheory/Perm/Cycle/Type.lean,Mathlib/GroupTheory/Schreier.lean,Mathlib/GroupTheory/SpecificGroups/Cyclic.lean,Mathlib/Tactic/ToAdditive/Frontend.lean 33 3 ['github-actions', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
246-33963
8 months ago
291-5042
291 days ago
0-53
53 seconds
28067 grunweg
author:grunweg
 Docstring enumerations Tracking PR; to be split. Audit all ocurrences of `^ \S`; exhaustive. --- - [x] depends on: #28068 - [x] depends on: #28069 - [ ] depends on: #28070 - [x] depends on: #28118 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict blocked-by-other-PR 264/263 Archive/Wiedijk100Theorems/SumOfPrimeReciprocalsDiverges.lean,Mathlib/Algebra/Algebra/Defs.lean,Mathlib/Algebra/BrauerGroup/Defs.lean,Mathlib/Algebra/Module/LinearMap/Polynomial.lean,Mathlib/CategoryTheory/Abelian/NonPreadditive.lean,Mathlib/CategoryTheory/EqToHom.lean,Mathlib/CategoryTheory/Filtered/Basic.lean,Mathlib/CategoryTheory/Limits/Final.lean,Mathlib/CategoryTheory/Limits/Pi.lean,Mathlib/CategoryTheory/Monoidal/Center.lean,Mathlib/CategoryTheory/Sites/Grothendieck.lean,Mathlib/CategoryTheory/Sites/Pretopology.lean,Mathlib/Condensed/Discrete/Characterization.lean,Mathlib/FieldTheory/ChevalleyWarning.lean,Mathlib/GroupTheory/MonoidLocalization/Basic.lean,Mathlib/LinearAlgebra/CliffordAlgebra/Basic.lean,Mathlib/LinearAlgebra/Multilinear/Basic.lean,Mathlib/LinearAlgebra/RootSystem/GeckConstruction/Basic.lean,Mathlib/MeasureTheory/Integral/Bochner/Basic.lean,Mathlib/MeasureTheory/Measure/MeasureSpace.lean,Mathlib/MeasureTheory/Measure/MeasureSpaceDef.lean,Mathlib/MeasureTheory/OuterMeasure/Basic.lean,Mathlib/MeasureTheory/OuterMeasure/Defs.lean,Mathlib/NumberTheory/FLT/Basic.lean,Mathlib/NumberTheory/LSeries/PrimesInAP.lean,Mathlib/RingTheory/Grassmannian.lean,Mathlib/RingTheory/Localization/Basic.lean,Mathlib/RingTheory/Localization/Defs.lean,Mathlib/RingTheory/WittVector/Teichmuller.lean,Mathlib/Tactic/Bound.lean,Mathlib/Tactic/Bound/Attribute.lean,Mathlib/Tactic/ENatToNat.lean,Mathlib/Tactic/FBinop.lean,Mathlib/Tactic/IntervalCases.lean,Mathlib/Tactic/TermCongr.lean,Mathlib/Util/Notation3.lean,Mathlib/Util/Superscript.lean,docs/Conv/Guide.lean 38 3 ['github-actions', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
244-35540
8 months ago
288-49197
288 days ago
0-2904
48 minutes
28908 joelriou
author:joelriou
 feat(CategoryTheory): Pullback functors on `Over` categories in `Type` have right adjoints Given a map `f : E → B`, in order to show that `Over.pullback f : Over B ⥤ Over E` commutes with colimits, we show that it admits a right adjoint. In order to do that, we first construct a functor `overPullback f : Over B ⥤ Over E` whose definition involves explicit types rather than categorical pullbacks, and we define its right adjoint `overPushforward f : Over E ⥤ Over B`. (In a future PR, it will be shown that the `Over.pullback` also commutes with colimits in categories of presheaves, and hopefully this will be used in the construction of the Quillen model category structure on simplicial sets.) --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict awaiting-author t-category-theory 103/0 Mathlib.lean,Mathlib/CategoryTheory/Limits/Types/OverPullback.lean,Mathlib/CategoryTheory/Limits/Types/Shapes.lean 3 10 ['emilyriehl', 'github-actions', 'joelriou', 'mathlib4-merge-conflict-bot', 'robin-carlier', 'sinhp'] nobody
242-11906
8 months ago
256-46639
256 days ago
13-50151
13 days
29330 plp127
author:plp127
 chore: define `Fin.cycleIcc` with conditions Redefine `Fin.cycleIcc` using conditionals instead of composing existing `Fin` operations together. Its worst-case runtime drops from O(n) to O(1). As a bonus, the definition no longer needs explaining. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-group-theory 61/68 Mathlib/GroupTheory/Perm/Fin.lean 1 10 ['JovanGerb', 'eric-wieser', 'github-actions', 'mathlib4-merge-conflict-bot', 'plp127', 'tb65536'] nobody
240-52217
7 months ago
240-52218
240 days ago
20-3817
20 days
29588 Periecle
author:Periecle
 feat(Analysis/Complex/Residue): Implement residue theory for complex functions at isolated singularities # Add basic residue theory for complex functions This PR introduces the residue theory implementation in mathlib. ## Main additions - **`HasIsolatedSingularityAt f c`**: Predicate for functions with isolated singularities at point `c` - **`residue f c hf`**: The residue of `f` at isolated singularity `c`, defined via circle integrals - **Radius independence**: `residue_eq_two_pi_I_inv_smul_circleIntegral` - residue equals normalized circle integral for any valid radius - **Holomorphic residues**: `residue_of_holomorphic` - functions holomorphic in a neighborhood have zero residue - **Simple pole formula**: `residue_simple_pole` - for `f(z) = (z-c)⁻¹ * g(z)`, residue equals `g(c)` ## Implementation notes - Builds on existing circle integral infrastructure in `CauchyIntegral.lean` - Uses `Classical.choose` to extract witness radius from isolated singularity condition - Comprehensive documentation with mathematical context and examples - Establishes foundation for residue theorem, argument principle, and other applications ## Examples included - `residue(1/z, 0) = 1` (canonical simple pole) - Radius independence demonstration - Zero residues for holomorphic functions This provides the essential building blocks for complex analysis and first step to formalize residue theory. awaiting-author t-analysis new-contributor 383/0 Mathlib/Analysis/Complex/Residue/Basic.lean 1 17 ['Periecle', 'github-actions', 'hrmacbeth', 'llllvvuu', 'loefflerd'] nobody
240-27576
7 months ago
252-33958
252 days ago
0-976
16 minutes
29482 mattrobball
author:mattrobball
 refactor (Algebra.Group.Defs): add npow/zpow/nsmul/zsmul as fields of new parents classes Adds ZPow G class and makes this a parent to DivInvMonoid and the corresponding additive versions. Updates zpow/zsmul operations to use the integrated power/scalar multiplication syntax. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-algebra
label:t-algebra$
 177/122 Mathlib/Algebra/Group/Action/Defs.lean,Mathlib/Algebra/Group/Basic.lean,Mathlib/Algebra/Group/Commute/Defs.lean,Mathlib/Algebra/Group/Defs.lean,Mathlib/Algebra/Group/Ext.lean,Mathlib/Algebra/Group/Int/Defs.lean,Mathlib/Algebra/Group/Opposite.lean,Mathlib/Algebra/Group/Pointwise/Set/Basic.lean,Mathlib/Algebra/Group/Prod.lean,Mathlib/Algebra/Group/Submonoid/Membership.lean,Mathlib/Algebra/Group/TypeTags/Basic.lean,Mathlib/Algebra/Group/Units/Defs.lean,Mathlib/Algebra/GroupWithZero/Basic.lean,Mathlib/Algebra/Module/NatInt.lean,Mathlib/Algebra/Order/GroupWithZero/Unbundled/Basic.lean,Mathlib/Algebra/Order/Monoid/Unbundled/WithTop.lean,Mathlib/Algebra/Order/Ring/Unbundled/Basic.lean,Mathlib/Algebra/Ring/ULift.lean,Mathlib/Data/BitVec.lean,Mathlib/Tactic/Abel.lean,Mathlib/Tactic/NormNum/Pow.lean 21 2 ['github-actions', 'mathlib4-merge-conflict-bot'] nobody
239-62475
7 months ago
255-2400
255 days ago
0-274
4 minutes
27829 dupuisf
author:dupuisf
 feat: modify `cfc_tac` to use `grind` --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict WIP 60/50 Mathlib/Algebra/Order/Star/Basic.lean,Mathlib/Algebra/Star/SelfAdjoint.lean,Mathlib/Analysis/CStarAlgebra/ContinuousFunctionalCalculus/Integral.lean,Mathlib/Analysis/CStarAlgebra/ContinuousFunctionalCalculus/NonUnital.lean,Mathlib/Analysis/CStarAlgebra/ContinuousFunctionalCalculus/Unital.lean,Mathlib/Analysis/SpecialFunctions/ContinuousFunctionalCalculus/ExpLog.lean,Mathlib/Analysis/SpecialFunctions/ContinuousFunctionalCalculus/PosPart/Basic.lean,Mathlib/Analysis/SpecialFunctions/ContinuousFunctionalCalculus/Rpow/Basic.lean,Mathlib/Tactic/ContinuousFunctionalCalculus.lean 9 2 ['github-actions', 'mathlib4-merge-conflict-bot'] nobody
238-30318
7 months ago
294-27878
294 days ago
0-1
1 second
21950 erdOne
author:erdOne
 feat(NumberTheory/Padics): the completion of `ℚ` at a finite place is `ℚ_[p]` --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-number-theory 253/1 Mathlib.lean,Mathlib/Algebra/GroupWithZero/WithZero.lean,Mathlib/NumberTheory/Padics/HeightOneSpectrum.lean,Mathlib/NumberTheory/Padics/PadicNumbers.lean,Mathlib/Topology/Algebra/Valued/WithVal.lean,Mathlib/Topology/Algebra/WithZeroMulInt.lean,Mathlib/Topology/Algebra/WithZeroTopology.lean 7 33 ['Ruben-VandeVelde', 'erdOne', 'faenuccio', 'github-actions', 'leanprover-community-bot-assistant', 'pechersky', 'smmercuri', 'xroblot'] nobody
238-27327
7 months ago
319-27264
319 days ago
73-10873
73 days
26178 ppls-nd-prs
author:ppls-nd-prs
 feat(CategoryTheory/Limits): Fubini for products We show that the product of products is a product indexed by the sigma type. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict awaiting-author t-category-theory new-contributor 17/0 Mathlib/CategoryTheory/Limits/Shapes/Products.lean 1 6 ['chrisflav', 'github-actions', 'leanprover-community-bot-assistant', 'ppls-nd-prs', 'robin-carlier'] nobody
235-42620
7 months ago
336-52020
336 days ago
0-47665
13 hours
27214 robin-carlier
author:robin-carlier
 feat(CategoryTheory/Limits/Shapes/Pullback/Categorical): Categorical pullback squares In this PR, we give the definition and first basic properties of categorical pullback squares. Using our previous work on `CategoricalPullback`, we define a typeclass `CatPullbackSquare T L R B` that asserts that a given `CatCommSq T L R B` is a "pullback square": this is the data of a chosen adjoint equivalence to the canonical functor from the top left corner of the square to the categorical pulback of its leg. Using this equivalence, be derive a universal property for functors from `X`with values in the top left corner of the square: they are equivalent to `CatCommSqOver R B X`, the category of categorical commutative squares over the cospan `R, B` with top left corner `X`. We prove some coherence result for this equivalence, most notably an isomorphism that, given `S : CatCommSqOver R B X`, bundles the two commutative triangles formed by the induced functor, and the coherence between the squares that these isomorphisms satisfy: this is conveniently bundled in the data of a single isomorphisms of `CatCommSqOver R B X`. Finally, we provide a `Prop`-class `IsCatPullbackSquare` that merely asserts the existence (via `Nonempty`) of the relevant data: we show that it is tautotogically equivalent to the propopsition that the canonical functor to the categorical pullback is an equivalence. --- - [ ] depends on: #26679 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-category-theory 786/1 Mathlib.lean,Mathlib/CategoryTheory/Limits/Shapes/Pullback/Categorical/Basic.lean,Mathlib/CategoryTheory/Limits/Shapes/Pullback/Categorical/Square.lean 3 3 ['github-actions', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
235-17409
7 months ago
235-17410
235 days ago
0-4464
1 hour
27391 robin-carlier
author:robin-carlier
 feat(CategoryTheory/Limits/Shapes/Pullback/Categorical): pseudofunctoriality structure of categorical pullback squares Using pseudofunctoriality of the construction `CatCommSqOver`, we show that categorical pullback squares have pseudofunctorial-like structures: given a `CatCommSq T L R B` and a `CatPullbackSq T' L' R' B'`, and a `CatCospanTransform R B R' B'`, there is a functor `CatPullbackSq.functorOfTransform` between the top left corners of the two squares. We give `CatCommSq` instances that relates this functor with other constructions such as `CatCommSqOver.transform`. Similarly, we construct `CatPullbackSq.functorOfTransform₂`, that maps morphisms of `CatCospanTransforms` to natural transformations. Finally, we show that `functorOfTransform` respects identities and compositions. We do not yet prove that all of this data satisfies all the expected properties of pseudofunctors: this will be the content of a follow-up PR. --- - [ ] depends on: #27214 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict blocked-by-other-PR t-category-theory 1090/1 Mathlib.lean,Mathlib/CategoryTheory/Limits/Shapes/Pullback/Categorical/Basic.lean,Mathlib/CategoryTheory/Limits/Shapes/Pullback/Categorical/Square.lean 3 3 ['github-actions', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
235-17407
7 months ago
303-35901
303 days ago
0-264
4 minutes
27432 robin-carlier
author:robin-carlier
 feat(CategoryTheory/Limits/Shapes/Pullback/Categorical): pseudofunctoriality of categorical pulback squares In this PR, we show that the "unbundled pseudofunctor" data constructed in #27391 satisfy the axioms of an actual "unbundled pseudo-functor". This is intended to give all the required coherence for a formal bicategory-like proof of the fact that `CatCospanAdjunction`s from #26578 (resp. `CatCospanEquivalence`s from #26579) promote to adjunctions (resp. equivalences) between the top left corners of categorical pullback squares. --- - [ ] depends on: #27391 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict blocked-by-other-PR t-category-theory 1244/1 Mathlib.lean,Mathlib/CategoryTheory/Limits/Shapes/Pullback/Categorical/Basic.lean,Mathlib/CategoryTheory/Limits/Shapes/Pullback/Categorical/Square.lean 3 3 ['github-actions', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
235-17405
7 months ago
302-21602
302 days ago
0-1056
17 minutes
27481 robin-carlier
author:robin-carlier
 feat(CategoryTheory/Limits/Shapes/Pullback/Categorical): adjunctions and equivalences of categorical pullback squares We show that a `CatCospanAdjunction` (resp `CatCospanEquivalence`) induces adjunctions (resp. equivalences) of the categories that sit at the top left corners of categorical pullback squares via the pseudofunctoriality proved in #27432. Thanks to the lemmas that proves that categorical pullback squares are fully pseudofunctorial, the proof is purely formal ("a pseudofunctor maps adjunctions (resp. equivalences) to adjunctions (resp. equivalences)"), rather than being a painful computation for the triangle equalities. In particular, the results here show that two categorical pullback squares with equivalent "underlying categorical cospan" are equivalent, which realizes the equivalence-invariance of the notion of categorical pullbacks. We do not yet show that a (not-necessarily pullback) `CatCommSq T L R B` equivalent to a `CatPullbackSquare T' L' R' B'` via a `CatCospanEquivalence R B R' B'` is also a `CatPullbackSquare`: this will be the content of a follow-up PR. --- - [ ] depends on: #27432 - [ ] depends on: #26579 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict blocked-by-other-PR t-category-theory large-import 1829/1 Mathlib.lean,Mathlib/CategoryTheory/Limits/Shapes/Pullback/Categorical/Basic.lean,Mathlib/CategoryTheory/Limits/Shapes/Pullback/Categorical/CatCospanTransform.lean,Mathlib/CategoryTheory/Limits/Shapes/Pullback/Categorical/Square.lean 4 3 ['github-actions', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
235-17403
7 months ago
301-19400
301 days ago
0-49
49 seconds
27686 robin-carlier
author:robin-carlier
 feat(CategoryTheory/Limits/Shapes/Pullback/Categorical/Square): more API for `CatPullbackSquare` In this PR, we provide more API around the notion of categorical pullback squares. Having established the pseudofunctoriality of the notion in #27432, we characterize the behaviour of the equivalence `CatPullbackSquare.functorEquiv (π₁ R B) (π₂ R B) R B X : X ⥤ R ⊡ B ≌ CatCommSqOver R B X` via various (d)simp lemmas. This ports all the pseudofunctoriality and equivalence-invariance results of `CatPullbackSquare` to `CategoricalPullback`. We also show this equivalence is isomorphic to the one from `CategoricalPullback.functorEquiv`. Unfortunately, this small duplication is necessary, as `CatPullbackSquare.functorEquiv` is bulit using `CategoricalPullback.functorEquiv`. The equivalence `CategoricalPullback.functorEquiv` is now an implementation detail, the idiomatic way is to use `CatPullbackSquare.functorEquiv`; docstrings are updated accordingly. This deprecates some constructions and lemmas for `CategoricalPullback`: they are now special case of the API that is available for any categorical pullback square. --- - [ ] depends on: #27481 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict blocked-by-other-PR t-category-theory large-import 2245/74 Mathlib.lean,Mathlib/CategoryTheory/Limits/Shapes/Pullback/Categorical/Basic.lean,Mathlib/CategoryTheory/Limits/Shapes/Pullback/Categorical/CatCospanTransform.lean,Mathlib/CategoryTheory/Limits/Shapes/Pullback/Categorical/Square.lean 4 4 ['github-actions', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
235-17278
7 months ago
296-23141
296 days ago
0-2752
45 minutes
27687 robin-carlier
author:robin-carlier
 feat(CategoryTheory/Limits/Shapes/Pullback/Categorical): squares equivalent to a `CatPullbackSquare` We provide the last remaining piece of the "equivalence-invariance" of categorical pullback squares: given a `CatCommSq (T : C₁ ⥤ _) L R B`, a `CatPullbackSquare (T' : D₁ ⥤ _) L' R' B'`, a `ψ : CatCospanEquivalence R B R' B'` and an equivalence `C₁ ≌ D₁` that identifies to the functor induced by `ψ`, the `CatCommSq T L R B` can be promoted to a `CatPullbackSquare T L R B'`. In other words: a `CatCommSq` that is equivalent to a `CatPullbackSquare` is a `CatPullbackSquare`. --- - [ ] depends on: #27686 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict blocked-by-other-PR t-category-theory large-import 2318/74 Mathlib.lean,Mathlib/CategoryTheory/Limits/Shapes/Pullback/Categorical/Basic.lean,Mathlib/CategoryTheory/Limits/Shapes/Pullback/Categorical/CatCospanTransform.lean,Mathlib/CategoryTheory/Limits/Shapes/Pullback/Categorical/Square.lean 4 4 ['github-actions', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
235-17276
7 months ago
296-23490
296 days ago
0-959
15 minutes
27688 robin-carlier
author:robin-carlier
 feat(CategoryTheory/Limits/Shapes/Pullback/Categorical): coherence statement for `CatPullbackSquare.inverse` This PR records a "coherence" statement for `CatPullbackSquares`: it bridges the gap between the user-provided `inverse` field of the `CatPullbackSquare` structure, and the other way one can deduce an equivalence between the top left corner of the square and a categorical pullback (via the pseudofunctoriality of categorical pullback squares induced by the identity `CatCospanTransform`). We show the two possible natural isomorphisms on the inverses of the equivalences are in fact the same (hence the term "coherence"). --- - [ ] depends on: #27686 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict blocked-by-other-PR t-category-theory large-import 2351/74 Mathlib.lean,Mathlib/CategoryTheory/Limits/Shapes/Pullback/Categorical/Basic.lean,Mathlib/CategoryTheory/Limits/Shapes/Pullback/Categorical/CatCospanTransform.lean,Mathlib/CategoryTheory/Limits/Shapes/Pullback/Categorical/Square.lean 4 4 ['github-actions', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
235-17275
7 months ago
296-23144
296 days ago
0-283
4 minutes
27689 robin-carlier
author:robin-carlier
 feat(CategoryTheory/Limits/Shapes/Pullback/Categorical): horizontal pasting calculus for `CatPullbackSquare` Given two categorical commutative squares that can be horizontally pasted, we prove that if the rightmost square is a `CatPullbackSquare`, then the leftmost square is a `CatPullbackSquare` if and only if the horizontal composition of the squares is a `CatPullbackSquare`. This generalizes to `CatPullbackSquare` the well-known "pasting calculus" for pullback squares in a category. The statement is made available both in terms of the `Type`-class `CatPullbackSquare`, and in terms of the `Prop`-class `IsCatPullbackSquare`. --- - [ ] depends on: #27686 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict blocked-by-other-PR t-category-theory large-import 2562/74 Mathlib.lean,Mathlib/CategoryTheory/Limits/Shapes/Pullback/Categorical/Basic.lean,Mathlib/CategoryTheory/Limits/Shapes/Pullback/Categorical/CatCospanTransform.lean,Mathlib/CategoryTheory/Limits/Shapes/Pullback/Categorical/Pasting.lean,Mathlib/CategoryTheory/Limits/Shapes/Pullback/Categorical/Square.lean 5 4 ['github-actions', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
235-17273
7 months ago
296-22404
296 days ago
0-667
11 minutes
27690 robin-carlier
author:robin-carlier
 feat(CategoryTheory/Limits/Shapes/Pullback/Categorical): vertical pasting calculus for `CatPullbackSquare` We mirror the constructions from #27689 to construct the vertical pasting calculus of `CatPullbackSquares`: given two vertically composable `CatCommSq` such that the bottom one is a `CatPullbackSquare`, the top square is a `CatPullbackSquare` if and only if the vertical composition (the "outer" square) is a `CatPullbackSquare`. --- - [ ] depends on: #27689 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict blocked-by-other-PR t-category-theory large-import 2841/74 Mathlib.lean,Mathlib/CategoryTheory/Limits/Shapes/Pullback/Categorical/Basic.lean,Mathlib/CategoryTheory/Limits/Shapes/Pullback/Categorical/CatCospanTransform.lean,Mathlib/CategoryTheory/Limits/Shapes/Pullback/Categorical/Pasting.lean,Mathlib/CategoryTheory/Limits/Shapes/Pullback/Categorical/Square.lean 5 4 ['github-actions', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
235-17271
7 months ago
295-42032
295 days ago
0-5969
1 hour
27740 robin-carlier
author:robin-carlier
 feat(CategoryTheory/Limits/Shapes/Pullback/Categorical): pasting calculus for `CategoricalPullback` Specialize the pasting calculus for categorical pullback squares to `CategoricalPullback̀` by providing equivalences of categories `R ⊡ (B₁ ⋙ B₂) ≌ (π₂ R B₂) ⊡ B₁` and `(R₁ ⋙ R₂) ⊡ B ≌ R₁ ⊡ (π₁ R₂ B)`. The `@[simps!]` attribute works wonderfully on these equivalences so that their component all have the expected (d)simp lemmas. --- - [ ] depends on: #27690 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict blocked-by-other-PR t-category-theory large-import 2872/75 Mathlib.lean,Mathlib/CategoryTheory/Limits/Shapes/Pullback/Categorical/Basic.lean,Mathlib/CategoryTheory/Limits/Shapes/Pullback/Categorical/CatCospanTransform.lean,Mathlib/CategoryTheory/Limits/Shapes/Pullback/Categorical/Pasting.lean,Mathlib/CategoryTheory/Limits/Shapes/Pullback/Categorical/Square.lean 5 4 ['github-actions', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
235-17270
7 months ago
295-42042
295 days ago
0-1017
16 minutes
26330 Timeroot
author:Timeroot
 feat: "Junk value" test file This PR continues the work from #25173. Original PR: https://github.com/leanprover-community/mathlib4/pull/25173 awaiting-author t-data 360/0 MathlibTest/Junk.lean 1 17 ['SnirBroshi', 'Timeroot', 'bryangingechen', 'github-actions', 'leanprover-community-bot-assistant', 'madvorak', 'pechersky', 'vihdzp'] pechersky
assignee:pechersky
234-71054
7 months ago
234-71054
234 days ago
48-67789
48 days
28807 alreadydone
author:alreadydone
 experiment: Submodule with SMul only (no Semiring) --- `SubMulAction` already takes `SMul`. TODO: relax typeclass requirements of `Ideal` as well. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra awaiting-CI merge-conflict
label:t-algebra$
 54/42 Mathlib/Algebra/Module/Submodule/Defs.lean 1 2 ['github-actions', 'mathlib4-merge-conflict-bot'] nobody
234-66843
7 months ago
unknown
0-0
0 seconds
28808 alreadydone
author:alreadydone
 experiment: Ideal with Mul only (no Semiring) --- - [ ] depends on: #28807 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra blocked-by-other-PR awaiting-CI merge-conflict
label:t-algebra$
 172/120 Mathlib/Algebra/Module/Submodule/Defs.lean,Mathlib/Algebra/Module/Submodule/Lattice.lean,Mathlib/LinearAlgebra/Matrix/Ideal.lean,Mathlib/LinearAlgebra/TensorProduct/Subalgebra.lean,Mathlib/RingTheory/AdicCompletion/Basic.lean,Mathlib/RingTheory/DividedPowers/SubDPIdeal.lean,Mathlib/RingTheory/Ideal/Defs.lean,Mathlib/RingTheory/Ideal/Lattice.lean,Mathlib/RingTheory/PrincipalIdealDomain.lean,Mathlib/RingTheory/Spectrum/Prime/RingHom.lean 10 3 ['github-actions', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
234-66842
7 months ago
unknown
0-0
0 seconds
26466 robin-carlier
author:robin-carlier
 feat(AlgebraicTopology/SimplexCategory/Augmented): the canonical monoid object in the augmented simplex category Show that in the augmented simplex category, `⦋0⦌` is an internal monoid object. Future work will show that this is in fact the universal monoid object: for any monoidal category `C`, evaluation at `⦋0⦌` induces an equivalence of categories between `Mon_ C` and the category of monoidal functors from `AugmentedSimplexCategory` to `C`. The resulting augmented cosimplicial object one gets from this construction is sometimes called the "monoidal bar construction" attached to a monoid. This PR was split from #25743. --- - [ ] depends on: #25743 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-algebraic-topology t-category-theory 571/111 Mathlib.lean,Mathlib/AlgebraicTopology/SimplexCategory/Augmented.lean,Mathlib/AlgebraicTopology/SimplexCategory/Augmented/Basic.lean,Mathlib/AlgebraicTopology/SimplexCategory/Augmented/Mon_.lean,Mathlib/AlgebraicTopology/SimplexCategory/Augmented/Monoidal.lean,Mathlib/AlgebraicTopology/SimplexCategory/Basic.lean 6 4 ['github-actions', 'leanprover-community-bot-assistant', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
234-36811
7 months ago
329-44095
329 days ago
0-1708
28 minutes
28074 grunweg
author:grunweg
 Isbilinearmap TODO see if it builds, move everything to the right place, add docs. update Pr description - written by Patrick, part of #26221 (and prereq for #28056) --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict WIP 64/0 Mathlib/Analysis/Normed/Module/FiniteDimension.lean,Mathlib/LinearAlgebra/BilinearMap.lean 2 2 ['github-actions', 'mathlib4-merge-conflict-bot'] nobody
234-3178
7 months ago
288-49094
288 days ago
0-2
2 seconds
26579 robin-carlier
author:robin-carlier
 feat(CategoryTheory/Limits/Pullbacks/Categorical/CatCospanTransform): equivalences of categorical cospans Building on the notion of adjunctions of categorical cospans, we define equivalences of categorical cospans as a structure extending that of an adjunction, with the extra data of a chosen inverse of the unit and counit morphisms. To mirror the design for usual equivalences of categories, we provide an alternative constructor that requires the forward and inverse direction of the equivalence, as well as unit and counits already as isomorphisms, and only a proof of the left triangle identity. Finally, we also provide a third constructor that builds such an equivalence out of the data of 3 component equivalences of categories, as well as chosen `CatCommSq` on the functors of the these equivalences. This notion of equivalence of categorical cospans is intended to encode the required data to show the full equivalence invariance of the categorical pullback defined in #26366. --- - [ ] depends on: #26578 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict blocked-by-other-PR t-category-theory large-import 438/0 Mathlib/CategoryTheory/Limits/Shapes/Pullback/Categorical/CatCospanTransform.lean 1 5 ['github-actions', 'leanprover-community-bot-assistant', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
233-43675
7 months ago
325-48216
325 days ago
0-838
13 minutes
26578 robin-carlier
author:robin-carlier
 feat(CategoryTheory/Limits/Pullbacks/Categorical/CatCospanTransform): adjunctions of categorical cospans We build upon the bicategory-like structure developed in #26447 and #26412 to define the notion of adjunctions of categorical cospans. This is a structure encoding the data of two `CatCospanTransform`s, along with the usual unit and counit morphisms as part of the data, satisfying the usual left and right triangle identities. We provide basic API for these, such as extracting adjunctions between individual components. We also provide a proof that the notion satisfies a "coherence": with our chosen constructor, the forward direction of the structure `CatCommSq` on the left adjoints correspond to the inverse of the square for the right adjoints through `mateEquiv`. These adjunctions will be used as a substrate for defining equivalences of categorical cospans in a future PR: such an equivalence will be a structure extending a `CatCospanAdjunction` with isomorphisms data on the unit and co-unit (we will however provide alternative constructors in sync with the constructor for equivalences of categories). --- - [x] depends on: #26447 - [x] depends on: #26547 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-category-theory large-import 205/0 Mathlib/CategoryTheory/Limits/Shapes/Pullback/Categorical/CatCospanTransform.lean 1 5 ['github-actions', 'leanprover-community-bot-assistant', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
233-40036
7 months ago
325-49208
325 days ago
0-625
10 minutes
26115 grunweg
author:grunweg
 WIP/proof of concept,feat: the inverse function theorem for manifolds --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict WIP t-differential-geometry 348/0 Mathlib.lean,Mathlib/Analysis/Calculus/ContDiff/Defs.lean,Mathlib/Geometry/Manifold/InverseFunctionTheorem.lean,Mathlib/Topology/PartialHomeomorph.lean 4 2 ['github-actions', 'mathlib4-merge-conflict-bot'] nobody
232-41923
7 months ago
unknown
0-0
0 seconds
28245 robin-carlier
author:robin-carlier
 feat(CategoryTheory/Bicategory/NaturalTransformation/Icon): strict associativity and unitality of icon composition We show that the vertical composition of icons defined in #28244 satisfies strict associativity and strict unitality. This morally shows that icons are fit as the 2-cells of a bicategory structure on bicategories and lax functors, though we do not record an instance of this sort. --- - [ ] depends on: #28244 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) WIP blocked-by-other-PR t-category-theory awaiting-CI large-import merge-conflict 975/33 Mathlib.lean,Mathlib/CategoryTheory/Bicategory/EqToHom.lean,Mathlib/CategoryTheory/Bicategory/NaturalTransformation/Icon.lean,Mathlib/CategoryTheory/Bicategory/NaturalTransformation/Lax.lean,Mathlib/CategoryTheory/Bicategory/NaturalTransformation/Oplax.lean,Mathlib/CategoryTheory/Bicategory/Strict.lean,Mathlib/CategoryTheory/EqToHom.lean,scripts/noshake.json 8 3 ['github-actions', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
232-8547
7 months ago
284-23492
284 days ago
0-331
5 minutes
30079 dagurtomas
author:dagurtomas
 feat(CategoryTheory): IsSheafFor as a multiequalizer condition --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) WIP t-category-theory 112/0 Mathlib/CategoryTheory/Sites/Multifork.lean 1 3 ['chrisflav', 'github-actions', 'joelriou'] nobody
231-82271
7 months ago
234-61077
234 days ago
0-1
1 second
29012 grunweg
author:grunweg
 chore: reduce `Topology` imports in `Data` Move Data.Real.Sqrt to Analysis. --- - [ ] depends on: #28966 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict file-removed 25/21 Archive/Imo/Imo1959Q2.lean,Archive/Imo/Imo1960Q2.lean,Archive/Imo/Imo2008Q3.lean,Archive/Imo/Imo2008Q4.lean,Archive/Sensitivity.lean,Mathlib.lean,Mathlib/Algebra/Star/CHSH.lean,Mathlib/Analysis/Complex/Norm.lean,Mathlib/Analysis/LocallyConvex/WithSeminorms.lean,Mathlib/Analysis/Normed/Module/Ball/Homeomorph.lean,Mathlib/Analysis/RCLike/Basic.lean,Mathlib/Analysis/Real/Sqrt.lean,Mathlib/Data/Rat/NatSqrt/Real.lean,Mathlib/Data/Real/CompleteField.lean,Mathlib/Data/Real/Irrational.lean,Mathlib/Data/Real/StarOrdered.lean,Mathlib/NumberTheory/Zsqrtd/ToReal.lean,Mathlib/Tactic/Linter/DirectoryDependency.lean,Mathlib/Tactic/NormNum/RealSqrt.lean,MathlibTest/positivity.lean 20 5 ['github-actions', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
231-35349
7 months ago
268-45295
268 days ago
0-2683
44 minutes
26601 yuma-mizuno
author:yuma-mizuno
 feat(CategoryTheory): make `Functor.comp` irreducible [#mathlib4 > Functor identity `𝟭 _ ⋙ F = F` is definitional equality](https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/Functor.20identity.20.60.F0.9D.9F.AD.20_.20.E2.8B.99.20F.20.3D.20F.60.20is.20definitional.20equality/with/523978659) --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict WIP t-category-theory 514/261 Mathlib/AlgebraicTopology/DoldKan/Compatibility.lean,Mathlib/AlgebraicTopology/SimplexCategory/Defs.lean,Mathlib/CategoryTheory/Adjunction/Basic.lean,Mathlib/CategoryTheory/CatCommSq.lean,Mathlib/CategoryTheory/Category/Cat.lean,Mathlib/CategoryTheory/Category/RelCat.lean,Mathlib/CategoryTheory/Category/ULift.lean,Mathlib/CategoryTheory/Core.lean,Mathlib/CategoryTheory/Discrete/Basic.lean,Mathlib/CategoryTheory/EqToHom.lean,Mathlib/CategoryTheory/Equivalence.lean,Mathlib/CategoryTheory/Functor/Basic.lean,Mathlib/CategoryTheory/Functor/Category.lean,Mathlib/CategoryTheory/Functor/Const.lean,Mathlib/CategoryTheory/Functor/Currying.lean,Mathlib/CategoryTheory/Functor/CurryingThree.lean,Mathlib/CategoryTheory/Functor/FullyFaithful.lean,Mathlib/CategoryTheory/Functor/Functorial.lean,Mathlib/CategoryTheory/Functor/ReflectsIso/Basic.lean,Mathlib/CategoryTheory/Functor/TwoSquare.lean,Mathlib/CategoryTheory/Groupoid/FreeGroupoid.lean,Mathlib/CategoryTheory/Join/Basic.lean,Mathlib/CategoryTheory/Limits/Cones.lean,Mathlib/CategoryTheory/Limits/Shapes/Pullback/Categorical/Basic.lean,Mathlib/CategoryTheory/ObjectProperty/FullSubcategory.lean,Mathlib/CategoryTheory/Opposites.lean,Mathlib/CategoryTheory/PathCategory/Basic.lean,Mathlib/CategoryTheory/Pi/Basic.lean,Mathlib/CategoryTheory/Products/Associator.lean,Mathlib/CategoryTheory/Products/Basic.lean,Mathlib/CategoryTheory/Quotient.lean,Mathlib/CategoryTheory/Sigma/Basic.lean,Mathlib/CategoryTheory/Whiskering.lean,Mathlib/CategoryTheory/Yoneda.lean 34 3 ['github-actions', 'leanprover-community-bot-assistant', 'mathlib4-merge-conflict-bot'] nobody
231-23150
7 months ago
unknown
0-0
0 seconds
23621 astrainfinita
author:astrainfinita
 chore: deprecate `LinearOrderedComm{Monoid, Group}WithZero` --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) - [x] depends on: #20676 merge-conflict t-algebra t-order
label:t-algebra$
 261/205 Archive/Imo/Imo1998Q2.lean,Counterexamples/LinearOrderWithPosMulPosEqZero.lean,Mathlib/Algebra/Order/Field/Canonical.lean,Mathlib/Algebra/Order/Field/Rat.lean,Mathlib/Algebra/Order/Floor/Ring.lean,Mathlib/Algebra/Order/GroupWithZero/Canonical.lean,Mathlib/Algebra/Order/GroupWithZero/Finset.lean,Mathlib/Algebra/Order/Hom/Monoid.lean,Mathlib/Algebra/Order/Nonneg/Field.lean,Mathlib/Algebra/Order/Nonneg/Ring.lean,Mathlib/Algebra/Order/Ring/Nat.lean,Mathlib/Combinatorics/Additive/PluenneckeRuzsa.lean,Mathlib/Combinatorics/SimpleGraph/Triangle/Basic.lean,Mathlib/Data/ENNReal/Basic.lean,Mathlib/Data/NNRat/Lemmas.lean,Mathlib/Data/NNReal/Defs.lean,Mathlib/Data/Rat/Cast/Order.lean,Mathlib/FieldTheory/IntermediateField/Adjoin/Defs.lean,Mathlib/FieldTheory/RatFunc/AsPolynomial.lean,Mathlib/GroupTheory/ArchimedeanDensely.lean,Mathlib/NumberTheory/EllipticDivisibilitySequence.lean,Mathlib/NumberTheory/FunctionField.lean,Mathlib/NumberTheory/Ostrowski.lean,Mathlib/RingTheory/Valuation/Archimedean.lean,Mathlib/RingTheory/Valuation/Basic.lean,Mathlib/RingTheory/Valuation/ExtendToLocalization.lean,Mathlib/RingTheory/Valuation/Integers.lean,Mathlib/RingTheory/Valuation/Integral.lean,Mathlib/RingTheory/Valuation/Minpoly.lean,Mathlib/RingTheory/Valuation/Quotient.lean,Mathlib/RingTheory/Valuation/RankOne.lean,Mathlib/RingTheory/Valuation/ValExtension.lean,Mathlib/RingTheory/Valuation/ValuationRing.lean,Mathlib/RingTheory/Valuation/ValuationSubring.lean,Mathlib/SetTheory/Cardinal/Order.lean,Mathlib/Topology/Algebra/Valued/LocallyCompact.lean,Mathlib/Topology/Algebra/Valued/NormedValued.lean,Mathlib/Topology/Algebra/Valued/ValuationTopology.lean,Mathlib/Topology/Algebra/Valued/ValuedField.lean,Mathlib/Topology/Algebra/Valued/WithVal.lean,Mathlib/Topology/Algebra/WithZeroTopology.lean,Mathlib/Topology/UnitInterval.lean,MathlibTest/instance_diamonds.lean,scripts/noshake.json 44 24 ['YaelDillies', 'astrainfinita', 'github-actions', 'grunweg', 'leanprover-bot', 'leanprover-community-bot-assistant', 'mathlib4-dependent-issues-bot'] kbuzzard
assignee:kbuzzard
230-21751
7 months ago
400-80524
400 days ago
5-42380
5 days
28630 Antidite
author:Antidite
 feat(Archive/Imo): right isosceles configuration in the complex plane feat(Archive/Imo): right isosceles configuration in the complex plane This adds `Archive/Imo/Imo1975Q3.lean`, formalizing a triangle configuration with points A=0, B=1, C=z and auxiliary points R, P, Q built via complex rotations and sine-based scale factors. Main results: * `angle_and_distance`: ∠QRP = π/2 and dist Q R = dist R P. * Key identity `QRP_rot90`: (Q z).z − R.z = e^{iπ/2} · ((P z).z − R.z). Design/Style: * Minimal imports; module docstring; semantic lemma names; all definitions and theorems live under the namespace `IMO.TriangleConfig`. Moves: - (none) Deletions: - (none) --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) IMO awaiting-author new-contributor 196/0 Archive.lean,Archive/Imo/Imo1975Q3.lean 2 36 ['Antidite', 'LLaurance', 'github-actions', 'jsm28'] jsm28
assignee:jsm28
230-8366
7 months ago
230-8366
230 days ago
46-25852
46 days
30192 erdOne
author:erdOne
 feat(RingTheory): valuative topology = adic topology for discrete rank 1 valuations --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict WIP t-ring-theory t-topology 190/2 Mathlib.lean,Mathlib/Order/Filter/Bases/Basic.lean,Mathlib/RingTheory/Valuation/ValuativeRel/Basic.lean,Mathlib/RingTheory/Valuation/ValuativeRel/Integers.lean,Mathlib/Topology/Algebra/Nonarchimedean/AdicTopology.lean,Mathlib/Topology/Algebra/Valued/ValuativeRel.lean 6 3 ['erdOne', 'github-actions', 'mathlib4-merge-conflict-bot'] nobody
229-37474
7 months ago
230-31919
230 days ago
0-331
5 minutes
26886 pechersky
author:pechersky
 feat(NumberTheory/Padics/ValuativeRel): ValuativeRel ℚ_[p] as well as instances for IsRankLeOne, IsNontrivial, IsDiscrete --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) - [ ] depends on: #26827 WIP t-number-theory blocked-by-other-PR t-algebra merge-conflict t-analysis
label:t-algebra$
 310/25 Mathlib.lean,Mathlib/Analysis/Normed/ValuativeRel.lean,Mathlib/NumberTheory/Padics/ValuativeRel.lean,Mathlib/Topology/Algebra/Valued/ValuativeRel.lean 4 4 ['github-actions', 'leanprover-community-bot-assistant', 'mathlib4-dependent-issues-bot'] nobody
228-81351
7 months ago
318-66279
318 days ago
0-1386
23 minutes
27314 pechersky
author:pechersky
 feat(TopologyValued): `Valued` based on a range topology Switch from a topology based on `fun γ : Γ₀ˣ => (v.ltAddSubgroup γ : AddSubgroup R)` to ``` fun rs : {rs : R × R // v rs.1 ≠ 0 ∧ v rs.2 ≠ 0} ↦ (v.ltAddSubgroup (Units.mk0 (v rs.val.2 / v rs.val.1) (by simp [rs.prop])) : AddSubgroup R) ``` This is in preparation for using `IsValuativeTopology` instead. In fact, that basis is precisely what `ValuativeTopology` asserts. `Valued.mk'` is kept, we do not yet rely on `IsValuativeTopology` and `UniformSpace`. The new `Valued` behaves the same way as it did before for `MulArchimedean` valuation codomains, which are all of the current in-mathlib uses of `Valued`. This is, for rank-one valuations. For valuations which rank one, but do not pass to the whole codomain, there are helper lemmas to discuss open/closed/clopen sets. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) - [x] depends on: #27264 - [x] depends on: #27265 - [ ] depends on: #27163 - [x] depends on: #27339 merge-conflict t-topology blocked-by-other-PR 733/259 Mathlib/Analysis/Normed/Field/Basic.lean,Mathlib/FieldTheory/RatFunc/AsPolynomial.lean,Mathlib/NumberTheory/FunctionField.lean,Mathlib/RingTheory/LaurentSeries.lean,Mathlib/RingTheory/Valuation/ValuativeRel.lean,Mathlib/Topology/Algebra/Valued/LocallyCompact.lean,Mathlib/Topology/Algebra/Valued/NormedValued.lean,Mathlib/Topology/Algebra/Valued/ValuationTopology.lean,Mathlib/Topology/Algebra/Valued/ValuativeRel.lean,Mathlib/Topology/Algebra/Valued/ValuedField.lean,Mathlib/Topology/Algebra/Valued/WithVal.lean,Mathlib/Topology/Algebra/Valued/WithZeroMulInt.lean 12 9 ['github-actions', 'kckennylau', 'leanprover-community-bot-assistant', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
228-28002
7 months ago
305-69108
305 days ago
0-22127
6 hours
30135 erdOne
author:erdOne
 feat(RingTheory): `ValuativeRel` on subrings --- @pechersky do we want this? [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) awaiting-author t-ring-theory 19/0 Mathlib/RingTheory/Valuation/ValuativeRel/Basic.lean 1 5 ['erdOne', 'github-actions', 'pechersky'] nobody
228-22047
7 months ago
228-81139
228 days ago
3-20137
3 days
28328 pechersky
author:pechersky
 chore(Topology/Valued): golf using local finite order of WithZeroTopology have to juggle in a version of `mrangeRestrict` which works on valuations, and also juggle the scoped topology over the subtype topology --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) - [ ] depends on: #28325 t-number-theory blocked-by-other-PR t-algebra large-import merge-conflict t-topology
label:t-algebra$
 187/88 Mathlib/Topology/Algebra/GroupWithZero.lean,Mathlib/Topology/Algebra/Valued/LocallyCompact.lean,Mathlib/Topology/Algebra/WithZeroTopology.lean,Mathlib/Topology/Compactness/Compact.lean 4 3 ['github-actions', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
224-39423
7 months ago
282-56385
282 days ago
0-1600
26 minutes
16773 arulandu
author:arulandu
 feat(Probability/Distributions): formalize Beta distribution Formalize Beta distribution, using Gamma distribution as a reference. Added real-valued beta wrapper, in the manner of gamma. Thanks to @EtienneC30 for help with casting real <-> complex. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict awaiting-author new-contributor t-measure-probability 286/1 Mathlib.lean,Mathlib/Analysis/SpecialFunctions/Gamma/Beta.lean,Mathlib/Probability/Distributions/Beta.lean 3 50 ['EtienneC30', 'arulandu', 'github-actions', 'mathlib4-merge-conflict-bot', 'vihdzp'] arulandu
assignee:arulandu
224-17671
7 months ago
614-45220
614 days ago
1-21124
1 day
30359 JLimperg
author:JLimperg
 [Not a PR] Benchmark for Aesop RPINF precompilation --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict file-removed 5/3 lake-manifest.json,lakefile.lean,scripts/bench/fake-root/lib/lean/libleanshared.so,scripts/bench/run 4 5 ['JLimperg', 'github-actions', 'leanprover-bot', 'mathlib4-merge-conflict-bot'] nobody
224-9678
7 months ago
unknown
0-0
0 seconds
30425 JLimperg
author:JLimperg
 [Not a PR] Benchmark Aesop with precompiled RPINF at instance transparency --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict 5/3 lake-manifest.json,lakefile.lean,scripts/bench/fake-root/lib/lean/libleanshared.so,scripts/bench/run 4 3 ['JLimperg', 'github-actions', 'leanprover-bot'] nobody
223-78212
7 months ago
unknown
0-0
0 seconds
30438 JLimperg
author:JLimperg
 [Not a PR] Benchmark Aesop change that computes fewer RPINFs --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict 5/3 lake-manifest.json,lakefile.lean,scripts/bench/fake-root/lib/lean/libleanshared.so,scripts/bench/run 4 5 ['JLimperg', 'github-actions', 'leanprover-bot'] nobody
223-22160
7 months ago
unknown
0-0
0 seconds
30440 JLimperg
author:JLimperg
 [Not a PR] Benchmark Aesop with no `hypTypes` in `ForwardState` and `instances` RPINF transparency --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict 5/3 lake-manifest.json,lakefile.lean,scripts/bench/fake-root/lib/lean/libleanshared.so,scripts/bench/run 4 3 ['JLimperg', 'github-actions', 'leanprover-bot'] nobody
223-17641
7 months ago
unknown
0-0
0 seconds
30452 JLimperg
author:JLimperg
 [Not a PR] Benchmark Aesop with no `hypTypes` in `ForwardState`, RPINF at `instances` transparency and lazy forward state --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict 5/3 lake-manifest.json,lakefile.lean,scripts/bench/fake-root/lib/lean/libleanshared.so,scripts/bench/run 4 3 ['JLimperg', 'github-actions', 'leanprover-bot'] nobody
222-84920
7 months ago
unknown
0-0
0 seconds
26284 plp127
author:plp127
 feat: faster implementation of `Nat.primeFactorsList` + `@[csimp]` lemma Add a function `Nat.primeFactorsListFast` that `#eval`s faster, and a `@[csimp]` lemma `Nat.primeFactorsList_eq_primeFactorsListFast` that shows `Nat.primeFactorsList = Nat.primeFactorsListFast`. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) awaiting-author t-data 95/0 Mathlib/Data/Nat/Factors.lean 1 11 ['b-mehta', 'github-actions', 'grunweg', 'plp127'] b-mehta
assignee:b-mehta
222-34549
7 months ago
222-61762
222 days ago
111-15071
111 days
27990 kckennylau
author:kckennylau
 feat(Counterexamples): a nontrivial valuation with discrete topology This file constructs a valuation on `K[X]` satisfying `IsValuativeTopology K[X] ∧ Nonempty (valuation K[X]).RankOne ∧ IsNontrivial K[X] ∧ DiscreteTopology K[X]`, and proves that `IsValuativeTopology F ∧ IsNontrivial F ∧ DiscreteTopology F` is not possible if `F` is a field. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-ring-theory 172/0 Counterexamples.lean,Counterexamples/DiscreteTopologyWithNontrivialValuation.lean 2 14 ['github-actions', 'grunweg', 'kckennylau', 'mathlib4-merge-conflict-bot', 'pechersky'] nobody
222-23882
7 months ago
222-23883
222 days ago
67-79609
67 days
28243 robin-carlier
author:robin-carlier
 chore(CategoryTheory/Bicategory): move some `eqToHom` lemmas The file `CategoryTheory/Bicategory/EqToHom.lean` introduced in #28242 is a more suitable hom for the lemmas `CategoryTheory.Bicategory.whiskerLeft_eqToHom` and `CategoryTheory.Bicategory.eqToHom_whiskerRight` than the current `CategoryTheory/Bicategory/Strict.lean`. We move these lemmas to the new file, and make `CategoryTheory/Bicategory/Strict` import these lemmas. --- - [x] depends on: #28242 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict awaiting-author t-category-theory 165/23 Mathlib.lean,Mathlib/CategoryTheory/Bicategory/EqToHom.lean,Mathlib/CategoryTheory/Bicategory/Strict.lean,Mathlib/CategoryTheory/EqToHom.lean,scripts/noshake.json 5 9 ['github-actions', 'joelriou', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot', 'robin-carlier'] nobody
222-20620
7 months ago
232-8550
232 days ago
0-9063
2 hours
26913 Paul-Lez
author:Paul-Lez
 feat(NumberTheory/{*}): add a few lemmas about number field and cyclotomic extensions The motivation for this PR is that the main statement in [this PR](https://github.com/google-deepmind/formal-conjectures/pull/297) shouldn't need to assume `p` has type `PNat` for the instances to work. This is still WIP as I need to clean up (currently waiting on the build!) --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) WIP t-number-theory t-algebra awaiting-CI merge-conflict
label:t-algebra$
 52/0 Mathlib/NumberTheory/ClassNumber/Temporary.lean,Mathlib/NumberTheory/Cyclotomic/Basic.lean,Mathlib/NumberTheory/Cyclotomic/Embeddings.lean,Mathlib/NumberTheory/NumberField/InfinitePlace/TotallyRealComplex.lean 4 2 ['github-actions', 'mathlib4-merge-conflict-bot'] nobody
219-25458
7 months ago
317-86232
317 days ago
0-28
28 seconds
27302 tristan-f-r
author:tristan-f-r
 feat(Fintype/Quotient): finLiftOn₂ The combination of [`Quotient.finLiftOn`](https://leanprover-community.github.io/mathlib4_docs/Mathlib/Data/Fintype/Quotient.html#Quotient.finLiftOn) and [`liftOn₂`](https://leanprover-community.github.io/mathlib4_docs/Init/Core.html#Quotient.liftOn%E2%82%82). --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) awaiting-author t-data 19/0 Mathlib/Data/Fintype/Quotient.lean 1 12 ['github-actions', 'kckennylau', 'pechersky', 'tristan-f-r', 'vihdzp'] pechersky
assignee:pechersky
218-61814
7 months ago
218-61814
218 days ago
6-5358
6 days
28925 grunweg
author:grunweg
 chore: remove `linear_combination'` tactic When `linear_combination` was refactored in #15899, the old code was kept as the `linear_combination'` tactic, for easier migration. The consensus of the zulip discussion ([#mathlib4 > Narrowing the scope of `linear_combination` @ 💬](https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/Narrowing.20the.20scope.20of.20.60linear_combination.60/near/470237816)) was to wait, and "revisit this once people have experienced the various tactics in practice". One year later, the old tactic has almost no uses: it is unused in mathlib; [searching on github](https://github.com/search?q=linear_combination%27%20path%3A*.lean&type=code) yields 37 hits --- all of which are in various forks of mathlib. Thus, removing this tactic seems appropriate. --- Do not merge before the zulip discussion has concluded! [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict file-removed awaiting-zulip 0/564 Mathlib.lean,Mathlib/Tactic.lean,Mathlib/Tactic/LinearCombination'.lean,Mathlib/Tactic/Linter/UnusedTactic.lean,MathlibTest/linear_combination'.lean 5 4 ['euprunin', 'github-actions', 'grunweg', 'mathlib4-merge-conflict-bot'] nobody
218-56890
7 months ago
270-2287
270 days ago
0-1
1 second
29855 eric-wieser
author:eric-wieser
 chore(Data/Finset/Sort): lemmas about `0 : Fin _` and `Fin.last _` We already had these for `⟨0, ⋯⟩` and `⟨k - 1, ⋯⟩`. Moves: - `Finset.orderEmbOfFin_zero` -> `Finset.orderEmbOfFin_mk_zero` - `Finset.orderEmbOfFin_last` -> `Finset.orderEmbOfFin_mk_last` --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-data t-order delegated easy 17/7 Mathlib/Combinatorics/Enumerative/Composition.lean,Mathlib/Data/Finset/Sort.lean 2 4 ['eric-wieser', 'github-actions', 'mathlib-bors', 'ocfnash'] nobody
218-9039
7 months ago
239-41129
239 days ago
3-79002
3 days
19616 adamtopaz
author:adamtopaz
 fix: fix the definition of the absolute Galois group of a field Previously it was defined as the Galois group of the algebraic closure, as opposed to the separable closure. Also, this adds some missing instances for this group. Still missing is compactness, but that seems like a bigger project. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-algebra awaiting-author t-number-theory
label:t-algebra$
 23/8 Mathlib/FieldTheory/AbsoluteGaloisGroup.lean,Mathlib/FieldTheory/KrullTopology.lean 2 4 ['acmepjz', 'alreadydone', 'github-actions'] nobody
216-50661
7 months ago
535-29157
535 days ago
3-64280
3 days
28826 alreadydone
author:alreadydone
 feat(CategoryTheory): Additive and Linear when Hom types are only monoids + introduce Presemiadditive categories, which generalizes Preadditive categories: the Hom sets are commutative monoids rather than groups, and `comp_zero` and `zero_comp` is no longer automatic. The new file Preadditive/Semi.lean is adapted from Preadditive/Basic.lean, though many contents can't be generalized. + generalize Functor.Additive and Functor.Linear to take Presemiadditive categories instead. The former needs a `map_zero` field since it's not automatic for Presemiadditive categories. + introduce SemimoduleCat, the category of semimodules (mathlib's Module) over a Semiring. The new file ModuleCat/Semi.lean is copied from ModuleCat/Basic.lean. TODOs: additive/linear equivalence between SemimoduleCat and ModuleCat and use it to transfer results; monoidal structure on SemimoduleCat; change `CommRing.Pic` to use SemimoduleCat. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict WIP t-category-theory awaiting-CI 978/123 Mathlib.lean,Mathlib/Algebra/Category/ModuleCat/Semi.lean,Mathlib/Algebra/Category/MonCat/Presemiadditive.lean,Mathlib/CategoryTheory/Linear/Basic.lean,Mathlib/CategoryTheory/Preadditive/AdditiveFunctor.lean,Mathlib/CategoryTheory/Preadditive/Basic.lean,Mathlib/CategoryTheory/Preadditive/Biproducts.lean,Mathlib/CategoryTheory/Preadditive/FunctorCategory.lean,Mathlib/CategoryTheory/Preadditive/Semi.lean 9 4 ['alreadydone', 'github-actions', 'mathlib4-merge-conflict-bot', 'plp127'] nobody
216-44446
7 months ago
271-79291
271 days ago
0-1
1 second
16428 astrainfinita
author:astrainfinita
 test use `QuotLike` APIs --- - [ ] depends on: #16421 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-data 1501/564 Mathlib.lean,Mathlib/Algebra/Associated/Basic.lean,Mathlib/Algebra/BigOperators/Associated.lean,Mathlib/Algebra/GCDMonoid/Basic.lean,Mathlib/Algebra/Group/Conj.lean,Mathlib/Algebra/GroupWithZero/NonZeroDivisors.lean,Mathlib/Algebra/Order/CauSeq/Completion.lean,Mathlib/Algebra/Quandle.lean,Mathlib/CategoryTheory/IsomorphismClasses.lean,Mathlib/CategoryTheory/Monoidal/Free/Basic.lean,Mathlib/CategoryTheory/Monoidal/Free/Coherence.lean,Mathlib/CategoryTheory/Skeletal.lean,Mathlib/Data/Finmap.lean,Mathlib/Data/Fintype/Quotient.lean,Mathlib/Data/Multiset/Basic.lean,Mathlib/Data/Multiset/Functor.lean,Mathlib/Data/QPF/Multivariate/Constructions/Fix.lean,Mathlib/Data/QPF/Univariate/Basic.lean,Mathlib/Data/Quot.lean,Mathlib/Data/QuotLike.lean,Mathlib/Data/Real/Basic.lean,Mathlib/Data/Setoid/Basic.lean,Mathlib/GroupTheory/Coset/Basic.lean,Mathlib/GroupTheory/Coset/Defs.lean,Mathlib/GroupTheory/GroupAction/Basic.lean,Mathlib/GroupTheory/GroupAction/ConjAct.lean,Mathlib/GroupTheory/GroupAction/Defs.lean,Mathlib/GroupTheory/QuotientGroup/Basic.lean,Mathlib/GroupTheory/QuotientGroup/Defs.lean,Mathlib/GroupTheory/Subgroup/Center.lean,Mathlib/LinearAlgebra/Quotient/Basic.lean,Mathlib/LinearAlgebra/Quotient/Defs.lean,Mathlib/Logic/Encodable/Basic.lean,Mathlib/Logic/Equiv/Basic.lean,Mathlib/Logic/Relation.lean,Mathlib/Order/RelIso/Basic.lean,Mathlib/SetTheory/Cardinal/Basic.lean,Mathlib/SetTheory/Cardinal/Finite.lean,Mathlib/SetTheory/Game/Basic.lean,Mathlib/SetTheory/Lists.lean,Mathlib/SetTheory/ZFC/Basic.lean,Mathlib/Topology/Inseparable.lean,test/QuotLike.lean 43 2 ['github-actions', 'mathlib4-dependent-issues-bot'] nobody
215-59025
7 months ago
unknown
0-0
0 seconds
16210 astrainfinita
author:astrainfinita
 Clean up quotient APIs ~~We may migrate to `Quot` and `IsEquiv` APIs in the future, but it might be a good start to clean up `Quotient` APIs anyway.~~ The diffs in this PR did not include `QuotLike` APIs, but eventually I decided to migrate to `QuotLike` before deprecating some old APIs. This is because some lemmas don't have alternatives that don't use `· ≈ ·`, and the alternatives that use `· ≈ ·` are in the core. See [Zulip](https://leanprover.zulipchat.com/#narrow/stream/113488-general/topic/.60.28.C2.B7.20.E2.89.88.20.C2.B7.29.60.20in.20.60Quotient.60.20APIs/near/466970386). --- - [x] depends on: #16254 - [x] depends on: #16256 - [x] depends on: #16258 - [x] depends on: #16260 - [x] depends on: #16264 - [x] depends on: #16267 - [ ] depends on: #16314 - [x] depends on: #16410 - [x] depends on: #17588 - [x] depends on: #17594 - [x] depends on: #17940 - [ ] depends on: #17941 --- `QuotLike` - [ ] depends on: #16421 - [ ] depends on: #16428 --- [remaining diffs](https://github.com/leanprover-community/mathlib4/compare/FR_quot_now..FR_quot) [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict tech debt blocked-by-other-PR t-data 1015/1114 Counterexamples/CliffordAlgebraNotInjective.lean,Mathlib/Algebra/Associated/Basic.lean,Mathlib/Algebra/BigOperators/Group/Finset.lean,Mathlib/Algebra/CharZero/Quotient.lean,Mathlib/Algebra/DirectLimit.lean,Mathlib/Algebra/GCDMonoid/Basic.lean,Mathlib/Algebra/Lie/Free.lean,Mathlib/Algebra/Lie/Quotient.lean,Mathlib/Algebra/Module/Torsion.lean,Mathlib/Algebra/Module/Zlattice/Basic.lean,Mathlib/Algebra/Order/CauSeq/Completion.lean,Mathlib/Algebra/Periodic.lean,Mathlib/Algebra/RingQuot.lean,Mathlib/AlgebraicGeometry/EllipticCurve/Jacobian.lean,Mathlib/AlgebraicGeometry/ProjectiveSpectrum/Scheme.lean,Mathlib/AlgebraicGeometry/ProjectiveSpectrum/StructureSheaf.lean,Mathlib/Analysis/Normed/Group/Quotient.lean,Mathlib/Analysis/Normed/Group/SemiNormedGrp/Kernels.lean,Mathlib/Analysis/SpecialFunctions/Trigonometric/Angle.lean,Mathlib/CategoryTheory/ConnectedComponents.lean,Mathlib/CategoryTheory/Limits/Shapes/SingleObj.lean,Mathlib/CategoryTheory/Limits/Types.lean,Mathlib/CategoryTheory/Skeletal.lean,Mathlib/CategoryTheory/Subobject/Basic.lean,Mathlib/CategoryTheory/Subobject/FactorThru.lean,Mathlib/CategoryTheory/Subobject/Lattice.lean,Mathlib/Combinatorics/Quiver/ConnectedComponent.lean,Mathlib/Combinatorics/SimpleGraph/Path.lean,Mathlib/Computability/Reduce.lean,Mathlib/Computability/TuringMachine.lean,Mathlib/Data/Countable/Defs.lean,Mathlib/Data/FinEnum.lean,Mathlib/Data/Finite/Basic.lean,Mathlib/Data/Fintype/Basic.lean,Mathlib/Data/Fintype/Card.lean,Mathlib/Data/Fintype/Quotient.lean,Mathlib/Data/List/Cycle.lean,Mathlib/Data/Multiset/Basic.lean,Mathlib/Data/Quot.lean,Mathlib/Data/Set/Image.lean,Mathlib/Data/Setoid/Basic.lean,Mathlib/Data/Setoid/Partition.lean,Mathlib/Data/Sym/Sym2.lean,Mathlib/FieldTheory/IsAlgClosed/AlgebraicClosure.lean,Mathlib/FieldTheory/PerfectClosure.lean,Mathlib/FieldTheory/SplittingField/Construction.lean,Mathlib/GroupTheory/Abelianization.lean,Mathlib/GroupTheory/Commensurable.lean,Mathlib/GroupTheory/CommutingProbability.lean,Mathlib/GroupTheory/Complement.lean,Mathlib/GroupTheory/Congruence/Basic.lean,Mathlib/GroupTheory/Coprod/Basic.lean,Mathlib/GroupTheory/Coset/Basic.lean,Mathlib/GroupTheory/DoubleCoset.lean,Mathlib/GroupTheory/FreeAbelianGroup.lean,Mathlib/GroupTheory/GroupAction/Basic.lean,Mathlib/GroupTheory/GroupAction/ConjAct.lean,Mathlib/GroupTheory/GroupAction/Quotient.lean,Mathlib/GroupTheory/Index.lean,Mathlib/GroupTheory/MonoidLocalization/Basic.lean,Mathlib/GroupTheory/Nilpotent.lean,Mathlib/GroupTheory/PGroup.lean,Mathlib/GroupTheory/Perm/Cycle/Concrete.lean,Mathlib/GroupTheory/QuotientGroup/Basic.lean,Mathlib/GroupTheory/SchurZassenhaus.lean,Mathlib/GroupTheory/Sylow.lean,Mathlib/GroupTheory/Transfer.lean,Mathlib/LinearAlgebra/Alternating/DomCoprod.lean,Mathlib/LinearAlgebra/Dimension/Constructions.lean,Mathlib/LinearAlgebra/InvariantBasisNumber.lean,Mathlib/LinearAlgebra/Isomorphisms.lean,Mathlib/LinearAlgebra/Projectivization/Basic.lean,Mathlib/LinearAlgebra/Quotient.lean,Mathlib/LinearAlgebra/QuotientPi.lean,Mathlib/Logic/Encodable/Basic.lean,Mathlib/MeasureTheory/Constructions/Polish/Basic.lean,Mathlib/MeasureTheory/Function/AEEqFun.lean,Mathlib/MeasureTheory/Group/FundamentalDomain.lean,Mathlib/MeasureTheory/MeasurableSpace/Basic.lean,Mathlib/MeasureTheory/Measure/Haar/Quotient.lean,Mathlib/ModelTheory/DirectLimit.lean,Mathlib/ModelTheory/Fraisse.lean,Mathlib/ModelTheory/Ultraproducts.lean,Mathlib/NumberTheory/NumberField/Embeddings.lean,Mathlib/NumberTheory/NumberField/Units/DirichletTheorem.lean,Mathlib/NumberTheory/Padics/PadicNumbers.lean,Mathlib/NumberTheory/RamificationInertia.lean,Mathlib/Order/Antisymmetrization.lean,Mathlib/Order/Category/PartOrd.lean,Mathlib/Order/Filter/Germ/Basic.lean,Mathlib/Order/Partition/Finpartition.lean,Mathlib/Order/RelIso/Basic.lean,Mathlib/RepresentationTheory/GroupCohomology/Hilbert90.lean,Mathlib/RingTheory/AdicCompletion/Algebra.lean,Mathlib/RingTheory/AdicCompletion/Basic.lean,Mathlib/RingTheory/AdicCompletion/Functoriality.lean,Mathlib/RingTheory/AdjoinRoot.lean,Mathlib/RingTheory/Congruence/Basic.lean,Mathlib/RingTheory/Flat/Basic.lean,Mathlib/RingTheory/GradedAlgebra/HomogeneousLocalization.lean 134 6 ['astrainfinita', 'github-actions', 'leanprover-bot', 'leanprover-community-mathlib4-bot'] nobody
215-59024
7 months ago
unknown
0-0
0 seconds
30642 thorimur
author:thorimur
 bench: lean4#10832 merge-conflict large-import 507/460 .github/workflows/nightly-docgen.yml,Cache/IO.lean,Mathlib.lean,Mathlib/Algebra/Algebra/StrictPositivity.lean,Mathlib/Algebra/BigOperators/Group/List/Basic.lean,Mathlib/Algebra/BigOperators/Group/List/Lemmas.lean,Mathlib/Algebra/Group/Units/Defs.lean,Mathlib/Algebra/Notation/Defs.lean,Mathlib/Algebra/Order/Ring/Unbundled/Rat.lean,Mathlib/Algebra/Polynomial/RuleOfSigns.lean,Mathlib/AlgebraicTopology/SimplexCategory/GeneratorsRelations/NormalForms.lean,Mathlib/Analysis/LocallyConvex/WithSeminorms.lean,Mathlib/Analysis/SpecialFunctions/ContinuousFunctionalCalculus/ExpLog.lean,Mathlib/Analysis/SpecialFunctions/ContinuousFunctionalCalculus/Rpow/Basic.lean,Mathlib/Combinatorics/SimpleGraph/CompleteMultipartite.lean,Mathlib/Combinatorics/SimpleGraph/FiveWheelLike.lean,Mathlib/Computability/DFA.lean,Mathlib/Computability/RegularExpressions.lean,Mathlib/Control/Monad/Cont.lean,Mathlib/Data/Finset/Attach.lean,Mathlib/Data/Finset/Defs.lean,Mathlib/Data/Finset/Empty.lean,Mathlib/Data/Finsupp/Notation.lean,Mathlib/Data/Fintype/Defs.lean,Mathlib/Data/Fintype/EquivFin.lean,Mathlib/Data/Int/LeastGreatest.lean,Mathlib/Data/List/Chain.lean,Mathlib/Data/List/Flatten.lean,Mathlib/Data/List/SplitOn.lean,Mathlib/Data/List/Triplewise.lean,Mathlib/Data/Multiset/ZeroCons.lean,Mathlib/Data/Nat/Digits/Defs.lean,Mathlib/Data/Set/Basic.lean,Mathlib/Data/Set/Insert.lean,Mathlib/Data/Set/Operations.lean,Mathlib/Data/String/Basic.lean,Mathlib/Data/String/Defs.lean,Mathlib/Data/String/Lemmas.lean,Mathlib/Lean/Elab/InfoTree.lean,Mathlib/MeasureTheory/Integral/IntervalIntegral/LebesgueDifferentiationThm.lean,Mathlib/Order/CompleteLattice/MulticoequalizerDiagram.lean,Mathlib/SetTheory/PGame/Basic.lean,Mathlib/Tactic/Basic.lean,Mathlib/Tactic/DeclarationNames.lean,Mathlib/Tactic/Hint.lean,Mathlib/Tactic/Linter/CommandStart.lean,Mathlib/Tactic/Linter/DocString.lean,Mathlib/Tactic/Linter/Header.lean,Mathlib/Tactic/Linter/TextBased.lean,Mathlib/Tactic/Says.lean,Mathlib/Tactic/SuccessIfFailWithMsg.lean,Mathlib/Tactic/ToAdditive/Frontend.lean,Mathlib/Tactic/ToAdditive/GuessName.lean,Mathlib/Tactic/ToExpr.lean,Mathlib/Tactic/Widget/Calc.lean,Mathlib/Tactic/Widget/CongrM.lean,Mathlib/Tactic/Widget/Conv.lean,Mathlib/Tactic/Widget/GCongr.lean,Mathlib/Tactic/Widget/InteractiveUnfold.lean,Mathlib/Tactic/Widget/LibraryRewrite.lean,Mathlib/Tactic/Widget/SelectPanelUtils.lean,Mathlib/Util/CompileInductive.lean,Mathlib/Util/Superscript.lean,MathlibTest/CalcQuestionMark.lean,MathlibTest/Change.lean,MathlibTest/DeprecateTo.lean,MathlibTest/FieldSimp.lean,MathlibTest/FindSyntax.lean,MathlibTest/LibraryRewrite.lean,MathlibTest/LibrarySearch/basic.lean,MathlibTest/LibrarySearch/mathlib.lean,MathlibTest/LibrarySearch/observe.lean,MathlibTest/Simps.lean,MathlibTest/Subsingleton.lean,MathlibTest/Use.lean,MathlibTest/Util/PrintSorries.lean,MathlibTest/Variable.lean,MathlibTest/fast_instance.lean,MathlibTest/grind/pairwise_disjoint.lean,MathlibTest/hint.lean,MathlibTest/propose.lean,MathlibTest/rewrites.lean,MathlibTest/ring.lean,MathlibTest/says.lean,MathlibTest/says_whitespace.lean,MathlibTest/success_if_fail_with_msg.lean,MathlibTest/toAdditive.lean,lake-manifest.json,lakefile.lean,lean-toolchain,scripts/check-yaml.lean,scripts/noshake.json 92 4 ['github-actions', 'leanprover-bot', 'mathlib4-merge-conflict-bot', 'thorimur'] nobody
215-18835
7 months ago
unknown
0-0
0 seconds
30643 thorimur
author:thorimur
 bench: before lean4#10832 merge-conflict large-import 507/460 .github/workflows/nightly-docgen.yml,Cache/IO.lean,Mathlib.lean,Mathlib/Algebra/Algebra/StrictPositivity.lean,Mathlib/Algebra/BigOperators/Group/List/Basic.lean,Mathlib/Algebra/BigOperators/Group/List/Lemmas.lean,Mathlib/Algebra/Group/Units/Defs.lean,Mathlib/Algebra/Notation/Defs.lean,Mathlib/Algebra/Order/Ring/Unbundled/Rat.lean,Mathlib/Algebra/Polynomial/RuleOfSigns.lean,Mathlib/AlgebraicTopology/SimplexCategory/GeneratorsRelations/NormalForms.lean,Mathlib/Analysis/LocallyConvex/WithSeminorms.lean,Mathlib/Analysis/SpecialFunctions/ContinuousFunctionalCalculus/ExpLog.lean,Mathlib/Analysis/SpecialFunctions/ContinuousFunctionalCalculus/Rpow/Basic.lean,Mathlib/Combinatorics/SimpleGraph/CompleteMultipartite.lean,Mathlib/Combinatorics/SimpleGraph/FiveWheelLike.lean,Mathlib/Computability/DFA.lean,Mathlib/Computability/RegularExpressions.lean,Mathlib/Control/Monad/Cont.lean,Mathlib/Data/Finset/Attach.lean,Mathlib/Data/Finset/Defs.lean,Mathlib/Data/Finset/Empty.lean,Mathlib/Data/Finsupp/Notation.lean,Mathlib/Data/Fintype/Defs.lean,Mathlib/Data/Fintype/EquivFin.lean,Mathlib/Data/Int/LeastGreatest.lean,Mathlib/Data/List/Chain.lean,Mathlib/Data/List/Flatten.lean,Mathlib/Data/List/SplitOn.lean,Mathlib/Data/List/Triplewise.lean,Mathlib/Data/Multiset/ZeroCons.lean,Mathlib/Data/Nat/Digits/Defs.lean,Mathlib/Data/Set/Basic.lean,Mathlib/Data/Set/Insert.lean,Mathlib/Data/Set/Operations.lean,Mathlib/Data/String/Basic.lean,Mathlib/Data/String/Defs.lean,Mathlib/Data/String/Lemmas.lean,Mathlib/Lean/Elab/InfoTree.lean,Mathlib/MeasureTheory/Integral/IntervalIntegral/LebesgueDifferentiationThm.lean,Mathlib/Order/CompleteLattice/MulticoequalizerDiagram.lean,Mathlib/SetTheory/PGame/Basic.lean,Mathlib/Tactic/Basic.lean,Mathlib/Tactic/DeclarationNames.lean,Mathlib/Tactic/Hint.lean,Mathlib/Tactic/Linter/CommandStart.lean,Mathlib/Tactic/Linter/DocString.lean,Mathlib/Tactic/Linter/Header.lean,Mathlib/Tactic/Linter/TextBased.lean,Mathlib/Tactic/Says.lean,Mathlib/Tactic/SuccessIfFailWithMsg.lean,Mathlib/Tactic/ToAdditive/Frontend.lean,Mathlib/Tactic/ToAdditive/GuessName.lean,Mathlib/Tactic/ToExpr.lean,Mathlib/Tactic/Widget/Calc.lean,Mathlib/Tactic/Widget/CongrM.lean,Mathlib/Tactic/Widget/Conv.lean,Mathlib/Tactic/Widget/GCongr.lean,Mathlib/Tactic/Widget/InteractiveUnfold.lean,Mathlib/Tactic/Widget/LibraryRewrite.lean,Mathlib/Tactic/Widget/SelectPanelUtils.lean,Mathlib/Util/CompileInductive.lean,Mathlib/Util/Superscript.lean,MathlibTest/CalcQuestionMark.lean,MathlibTest/Change.lean,MathlibTest/DeprecateTo.lean,MathlibTest/FieldSimp.lean,MathlibTest/FindSyntax.lean,MathlibTest/LibraryRewrite.lean,MathlibTest/LibrarySearch/basic.lean,MathlibTest/LibrarySearch/mathlib.lean,MathlibTest/LibrarySearch/observe.lean,MathlibTest/Simps.lean,MathlibTest/Subsingleton.lean,MathlibTest/Use.lean,MathlibTest/Util/PrintSorries.lean,MathlibTest/Variable.lean,MathlibTest/fast_instance.lean,MathlibTest/grind/pairwise_disjoint.lean,MathlibTest/hint.lean,MathlibTest/propose.lean,MathlibTest/rewrites.lean,MathlibTest/ring.lean,MathlibTest/says.lean,MathlibTest/says_whitespace.lean,MathlibTest/success_if_fail_with_msg.lean,MathlibTest/toAdditive.lean,lake-manifest.json,lakefile.lean,lean-toolchain,scripts/check-yaml.lean,scripts/noshake.json 92 4 ['github-actions', 'leanprover-bot', 'mathlib4-merge-conflict-bot', 'thorimur'] nobody
215-18834
7 months ago
unknown
0-0
0 seconds
26291 RemyDegenne
author:RemyDegenne
 feat(Probability): Cameron-Martin theorem - Definition of the Cameron-Martin space of a Gaussian measure - The Cameron-Martin theorem: shifting a Gaussian measure by an element of the Cameron-Martin space gives an equivalent measure, and shifting by an element which is not in the Cameron-Martin space gives a mutually singular measure. --- - [x] depends on: #24975 - [x] depends on: #24969 - [x] depends on: #24930 - [x] depends on: #24925 - [x] depends on: #24900 - [x] depends on: #25532 - [x] depends on: #27022 - [x] depends on: #27027 - [x] depends on: #27029 - [x] depends on: #27123 - [x] depends on: #27610 - [x] depends on: #28342 - [x] depends on: #28343 - [x] depends on: #30167 - [x] depends on: #30346 - [x] depends on: #30348 - [ ] depends on: #30582 - [x] depends on: #31551 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) --- *This PR continues the work from #24430.* *Original PR: https://github.com/leanprover-community/mathlib4/pull/24430* WIP blocked-by-other-PR t-measure-probability merge-conflict 1963/13 Mathlib.lean,Mathlib/Probability/Distributions/Gaussian/CameronMartin.lean,Mathlib/Probability/Distributions/Gaussian/CameronMartinThm.lean,Mathlib/Probability/Distributions/Gaussian/CompletionResultsToBeMoved.lean,Mathlib/Probability/Distributions/Gaussian/Real.lean,Mathlib/Probability/Moments/CovarianceBilinDual.lean,Mathlib/Probability/Moments/Variance.lean,Mathlib/Topology/Algebra/Module/Basic.lean,Mathlib/Topology/Algebra/Module/ClosedSubmodule.lean,Mathlib/Topology/UniformSpace/AbstractCompletion.lean,docs/1000.yaml 14 13 ['github-actions', 'grunweg', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
214-29424
7 months ago
333-48816
333 days ago
0-2
2 seconds
30460 janithamalith
author:janithamalith
 feat(Nat): add lemma nat_card_orbit_mul_card_stabilizer_eq_card_group Added a lemma `nat_card_orbit_mul_card_stabilizer_eq_card_group` which is the Nat.card version of MulAction.card_orbit_mul_card_stabilizer_eq_card_group --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) awaiting-author t-group-theory new-contributor 6/0 Mathlib/GroupTheory/GroupAction/CardCommute.lean 1 17 ['github-actions', 'kckennylau', 'plp127', 'tb65536'] tb65536
assignee:tb65536
214-27921
7 months ago
214-27921
214 days ago
8-8414
8 days
25737 robin-carlier
author:robin-carlier
 feat(AlgebraicTopology/SimplexCategory/GeneratorsRelations/NormalForms): Normal forms for `P_δ`s We prove that admissible lists indeed provide a normal form for morphisms of satisfying `P_δ`. To this end, we introduce `standardδ`, a construction that takes a list and turn it into a composition of `δ i`s in `SimplexCategoryGenRel`. We then prove that, thanks to the first simplicial identity, composition on the left corresponds to simplicial insertion in the list. This gives existence of a normal form for every morphism satisfying `P_δ`. For unicity, we introduce an auxiliary function `simplicialEvalδ : (List ℕ) → ℕ → ℕ` and show that for admissible lists, it lifts to `ℕ` the `orderHom` attached to `toSimplexCategory.map standardδ`, and that we can recover elements of the list only by looking at values of this function. Part of a series of PR formalising that `SimplexCategoryGenRel` is equivalent to `SimplexCategory`. --- - [x] depends on: #25736 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) --- *This PR continues the work from #21746.* *Original PR: https://github.com/leanprover-community/mathlib4/pull/21746* t-algebraic-topology delegated t-category-theory 182/2 Mathlib/AlgebraicTopology/SimplexCategory/GeneratorsRelations/NormalForms.lean 1 6 ['github-actions', 'joelriou', 'mathlib-bors', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
213-28709
7 months ago
214-20425
214 days ago
0-22513
6 hours
30209 Ruben-VandeVelde
author:Ruben-VandeVelde
 feat: some TwoSidedIdeal.span lemmas --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) awaiting-author t-ring-theory FLT 16/0 Mathlib/RingTheory/TwoSidedIdeal/Operations.lean 1 2 ['erdOne', 'github-actions'] erdOne
assignee:erdOne
212-85615
7 months ago
212-85615
212 days ago
17-9153
17 days
25225 xcloudyunx
author:xcloudyunx
 feat(Combinatorics/SimpleGraph): Eulerian walk in connected graph contains all vertices --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) awaiting-author t-combinatorics new-contributor 16/0 Mathlib/Combinatorics/SimpleGraph/Trails.lean 1 6 ['IvanRenison', 'github-actions', 'vlad902'] kmill
assignee:kmill
212-77853
7 months ago
212-77853
212 days ago
148-3286
148 days
27206 grhkm21
author:grhkm21
 feat(CategoryTheory/Adjunction): partial adjoints are adjoints Partial adjunctions `F.partial{Left,Right}Adjunction` are adjunctions when fully defined i.e. `F.{left,right}AdjointObjIsDefined = ⊤`. awaiting-author t-category-theory 48/2 Mathlib/CategoryTheory/Adjunction/PartialAdjoint.lean 1 1 ['github-actions'] nobody
212-23689
7 months ago
310-35894
310 days ago
0-53
53 seconds
27196 YaelDillies
author:YaelDillies
 refactor(Polynomial/Bivariate): swap `X` and `Y` for improved notation This way, `X` keeps on being `X`. From Toric --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) WIP t-algebra toric
label:t-algebra$
 3/3 Mathlib/Algebra/Polynomial/Bivariate.lean 1 7 ['YaelDillies', 'alreadydone', 'github-actions', 'kckennylau'] nobody
212-17242
7 months ago
294-54353
294 days ago
15-75841
15 days
24532 robertmaxton42
author:robertmaxton42
 feat(LinearAlgebra/FreeProduct): fill out the `FreeProduct.asPowers` namespace * Replicate the existing API for `LinearAlgebra.FreeProduct` under `FreeProduct.asPowers`, for convenience when working primarily with the power algebra representation * Adds convenience lemmas for using the corresponding quotient relation `rel'` (used in the above). --- - [x] depends on: #24531 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-algebra
label:t-algebra$
 122/5 Mathlib/LinearAlgebra/FreeProduct/Basic.lean 1 26 ['YaelDillies', 'adomani', 'github-actions', 'leanprover-community-bot-assistant', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot', 'robertmaxton42'] nobody
211-67703
6 months ago
376-55134
376 days ago
0-47665
13 hours
27683 dupuisf
author:dupuisf
 feat: grind tags for set operations This PR adds `grind` tags for various set operations (union, intersection, complement, etc). --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-data 29/9 Mathlib/Data/Set/Basic.lean,Mathlib/Data/Set/Operations.lean 2 5 ['dupuisf', 'euprunin', 'github-actions', 'mathlib4-merge-conflict-bot'] nobody
211-18992
6 months ago
296-28304
296 days ago
0-292
4 minutes
30828 DeVilhena-Paulo
author:DeVilhena-Paulo
 feat: implementation of `Finmap.merge` The main contribution of this pull request is the implementation of a `merge` function for finite maps (`Finmap`). The construction relies on the definition of a `merge` function for association lists (`AList`). There is also a side (unrelated) contribution on `Mathlib/Data/List/Permutation.lean`: the addition of a theorem about the permutation of a list with a head element (that is, a list of the form `a :: l`). --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-data new-contributor 449/3 Mathlib/Data/Finmap.lean,Mathlib/Data/List/AList.lean,Mathlib/Data/List/Permutation.lean,Mathlib/Data/List/Sigma.lean 4 1 ['github-actions'] nobody
211-14885
6 months ago
211-14956
211 days ago
0-80
1 minute
29355 girving
author:girving
 feat(Trigonometric): Taylor series bounds for sin and cos Zulip discussion here: https://leanprover.zulipchat.com/#narrow/channel/217875-Is-there-code-for-X.3F/topic/Better.20.60Real.2Esin.60.20bounds/near/535035576 We also include the full set of intervals on which sin and cos are monotone/antitone. --- Questions to resolve as part of review: 1. I've left the `Finset.sum_range_even` in the new `SeriesBounds` file, but presumably it should go somewhere else (unless you want me to inline it, but that seems worse). 2. Is putting the new Taylor series bounds in a new `SeriesBounds` file right, or should it go in the current `Bounds.lean` file? When I started writing the PR I thought the new bounds would need more imports via more analysis, but it turns out the only new import needed would be `Mathlib.Algebra.BigOperators.Field` which seems lightweight. I am happy with whatever the preference is in terms of file structure. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-analysis 158/0 Mathlib.lean,Mathlib/Algebra/BigOperators/Ring/Finset.lean,Mathlib/Analysis/SpecialFunctions/Trigonometric/Bounds.lean,Mathlib/Analysis/SpecialFunctions/Trigonometric/SeriesBounds.lean 4 28 ['Parcly-Taxel', 'Ruben-VandeVelde', 'adomani', 'girving', 'github-actions', 'llllvvuu', 'mathlib4-merge-conflict-bot', 'urkud'] nobody
211-10375
6 months ago
259-10164
259 days ago
0-76697
21 hours
28298 thorimur
author:thorimur
 chore: dedent `to_additive` docstrings This PR uses automation to dedent `to_additive` docstrings throughout Mathlib. It does not lint against indentation or in any way enforce indentation standards for future docstrings. The convention was chosen in accordance with the discussion and polls at [this Zulip thread](https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/Poll.3A.20Indentation.20style.20for.20.60to_additive.60.20docstrings/with/534285603). --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict documentation awaiting-author 949/949 Mathlib/Algebra/BigOperators/Fin.lean,Mathlib/Algebra/BigOperators/Finprod.lean,Mathlib/Algebra/BigOperators/Finsupp/Basic.lean,Mathlib/Algebra/BigOperators/Group/Finset/Lemmas.lean,Mathlib/Algebra/BigOperators/Group/List/Basic.lean,Mathlib/Algebra/BigOperators/Group/Multiset/Defs.lean,Mathlib/Algebra/BigOperators/Pi.lean,Mathlib/Algebra/Category/Grp/Basic.lean,Mathlib/Algebra/Category/Grp/FilteredColimits.lean,Mathlib/Algebra/Category/Grp/Limits.lean,Mathlib/Algebra/Category/Grp/Ulift.lean,Mathlib/Algebra/Category/MonCat/Basic.lean,Mathlib/Algebra/Category/MonCat/FilteredColimits.lean,Mathlib/Algebra/Category/MonCat/Limits.lean,Mathlib/Algebra/Category/Semigrp/Basic.lean,Mathlib/Algebra/Free.lean,Mathlib/Algebra/FreeMonoid/Basic.lean,Mathlib/Algebra/Group/Action/Defs.lean,Mathlib/Algebra/Group/Action/Pi.lean,Mathlib/Algebra/Group/Action/Pointwise/Finset.lean,Mathlib/Algebra/Group/Basic.lean,Mathlib/Algebra/Group/Defs.lean,Mathlib/Algebra/Group/Embedding.lean,Mathlib/Algebra/Group/Equiv/Basic.lean,Mathlib/Algebra/Group/Equiv/Defs.lean,Mathlib/Algebra/Group/Equiv/Opposite.lean,Mathlib/Algebra/Group/Even.lean,Mathlib/Algebra/Group/Hom/Basic.lean,Mathlib/Algebra/Group/Hom/Defs.lean,Mathlib/Algebra/Group/Hom/Instances.lean,Mathlib/Algebra/Group/Indicator.lean,Mathlib/Algebra/Group/Pi/Lemmas.lean,Mathlib/Algebra/Group/Pi/Units.lean,Mathlib/Algebra/Group/Pointwise/Finset/Basic.lean,Mathlib/Algebra/Group/Pointwise/Set/Basic.lean,Mathlib/Algebra/Group/Prod.lean,Mathlib/Algebra/Group/Subgroup/Basic.lean,Mathlib/Algebra/Group/Subgroup/Defs.lean,Mathlib/Algebra/Group/Subgroup/Ker.lean,Mathlib/Algebra/Group/Subgroup/Lattice.lean,Mathlib/Algebra/Group/Subgroup/Map.lean,Mathlib/Algebra/Group/Subgroup/Pointwise.lean,Mathlib/Algebra/Group/Submonoid/Basic.lean,Mathlib/Algebra/Group/Submonoid/BigOperators.lean,Mathlib/Algebra/Group/Submonoid/Defs.lean,Mathlib/Algebra/Group/Submonoid/Membership.lean,Mathlib/Algebra/Group/Submonoid/MulAction.lean,Mathlib/Algebra/Group/Submonoid/Operations.lean,Mathlib/Algebra/Group/Subsemigroup/Basic.lean,Mathlib/Algebra/Group/Subsemigroup/Operations.lean,Mathlib/Algebra/Group/UniqueProds/Basic.lean,Mathlib/Algebra/Group/Units/Defs.lean,Mathlib/Algebra/Group/Units/Equiv.lean,Mathlib/Algebra/Group/Units/Hom.lean,Mathlib/Algebra/Group/Units/Opposite.lean,Mathlib/Algebra/Notation/Pi/Basic.lean,Mathlib/Algebra/Opposites.lean,Mathlib/Algebra/Order/BigOperators/Group/List.lean,Mathlib/Algebra/Order/Group/Abs.lean,Mathlib/Algebra/Order/Group/Basic.lean,Mathlib/Algebra/Order/Group/Cone.lean,Mathlib/Algebra/Order/Group/OrderIso.lean,Mathlib/Algebra/Order/Group/Units.lean,Mathlib/Algebra/Order/Hom/Monoid.lean,Mathlib/Algebra/Order/Monoid/Basic.lean,Mathlib/Algebra/Order/Monoid/Canonical/Defs.lean,Mathlib/Algebra/Order/Monoid/Submonoid.lean,Mathlib/Algebra/Order/Monoid/Unbundled/Basic.lean,Mathlib/Algebra/Order/Monoid/Unbundled/WithTop.lean,Mathlib/Algebra/Order/Monoid/Units.lean,Mathlib/Algebra/Order/Pi.lean,Mathlib/Algebra/Regular/Defs.lean,Mathlib/Analysis/Normed/Group/Basic.lean,Mathlib/CategoryTheory/Monoidal/Discrete.lean,Mathlib/Data/Finset/NoncommProd.lean,Mathlib/Data/Fintype/BigOperators.lean,Mathlib/Data/Set/MulAntidiagonal.lean,Mathlib/Data/Set/SMulAntidiagonal.lean,Mathlib/Data/Vector/Basic.lean,Mathlib/Dynamics/Ergodic/Action/OfMinimal.lean,Mathlib/Dynamics/FixedPoints/Prufer.lean,Mathlib/Geometry/Manifold/Algebra/SmoothFunctions.lean,Mathlib/GroupTheory/Complement.lean,Mathlib/GroupTheory/Congruence/Basic.lean,Mathlib/GroupTheory/Congruence/Defs.lean,Mathlib/GroupTheory/Coprod/Basic.lean,Mathlib/GroupTheory/Coset/Basic.lean,Mathlib/GroupTheory/Divisible.lean,Mathlib/GroupTheory/EckmannHilton.lean,Mathlib/GroupTheory/FreeGroup/Basic.lean,Mathlib/GroupTheory/FreeGroup/Reduce.lean,Mathlib/GroupTheory/GroupAction/Basic.lean,Mathlib/GroupTheory/GroupAction/Blocks.lean,Mathlib/GroupTheory/GroupAction/Defs.lean,Mathlib/GroupTheory/GroupAction/FixedPoints.lean,Mathlib/GroupTheory/GroupAction/Hom.lean,Mathlib/GroupTheory/GroupAction/MultipleTransitivity.lean,Mathlib/GroupTheory/GroupAction/Primitive.lean,Mathlib/GroupTheory/GroupAction/Quotient.lean,Mathlib/GroupTheory/GroupAction/SubMulAction.lean 141 11 ['eric-wieser', 'github-actions', 'grunweg', 'mathlib4-merge-conflict-bot', 'thorimur'] nobody
208-44957
6 months ago
282-10782
282 days ago
0-46097
12 hours
28737 astrainfinita
author:astrainfinita
 refactor: deprecate `MulEquivClass` This PR continues the work from #18806. Original PR: https://github.com/leanprover-community/mathlib4/pull/18806 merge-conflict awaiting-author t-algebra
label:t-algebra$
 67/77 Mathlib/Algebra/BigOperators/Finprod.lean,Mathlib/Algebra/Group/Equiv/Basic.lean,Mathlib/Algebra/Group/Equiv/Defs.lean,Mathlib/Algebra/Group/Irreducible/Lemmas.lean,Mathlib/Algebra/Group/Subgroup/Map.lean,Mathlib/Algebra/Group/Submonoid/Operations.lean,Mathlib/Algebra/Group/Units/Equiv.lean,Mathlib/Algebra/GroupWithZero/Equiv.lean,Mathlib/Algebra/GroupWithZero/NonZeroDivisors.lean,Mathlib/Algebra/Module/Equiv/Defs.lean,Mathlib/Algebra/Order/CauSeq/Basic.lean,Mathlib/Algebra/Order/Hom/Monoid.lean,Mathlib/Algebra/Prime/Lemmas.lean,Mathlib/Algebra/Ring/Divisibility/Basic.lean,Mathlib/Algebra/Ring/Equiv.lean,Mathlib/Algebra/Star/MonoidHom.lean,Mathlib/Combinatorics/Additive/FreimanHom.lean,Mathlib/GroupTheory/GroupExtension/Defs.lean,Mathlib/GroupTheory/Submonoid/Center.lean,Mathlib/LinearAlgebra/FreeModule/Finite/CardQuotient.lean,Mathlib/RingTheory/Bialgebra/Equiv.lean,Mathlib/RingTheory/Ideal/Norm/AbsNorm.lean,Mathlib/RingTheory/Multiplicity.lean,Mathlib/RingTheory/UniqueFactorizationDomain/NormalizedFactors.lean,Mathlib/Topology/Algebra/ContinuousMonoidHom.lean,Mathlib/Topology/Algebra/InfiniteSum/Basic.lean 26 20 ['Vierkantor', 'alreadydone', 'astrainfinita', 'github-actions', 'grunweg', 'leanprover-bot', 'leanprover-community-mathlib4-bot', 'mathlib4-merge-conflict-bot'] Vierkantor
assignee:Vierkantor
206-47372
6 months ago
270-7545
270 days ago
2-39213
2 days
28676 sun123zxy
author:sun123zxy
 feat(NumberTheory/ArithmeticFunction): wrap `Nat.totient` as an `ArithmeticFunction` This wraps the Euler's totient function `Nat.totient` into a new `ArithmeticFunction` `ϕ`, with some basic identities such as `ϕ * ζ = id` and `μ * id = ϕ.` --- We use the notation `ϕ` to distinguish from `Nat.totient`'s notation `φ`, however this might be controversial. Suggestions are welcome! [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-number-theory new-contributor large-import merge-conflict awaiting-author 45/5 Mathlib/NumberTheory/ArithmeticFunction.lean 1 19 ['MichaelStollBayreuth', 'SnirBroshi', 'b-mehta', 'eric-wieser', 'github-actions', 'mathlib4-merge-conflict-bot', 'riccardobrasca', 'sun123zxy'] MichaelStollBayreuth
assignee:MichaelStollBayreuth
206-47324
6 months ago
222-22000
222 days ago
47-58311
47 days
30299 franv314
author:franv314
 feat(Topology/Instances): Cantor set Prove that the Cantor set has empty interior and the cardinality of the continuum as discussed on [Zulip](https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/A.20few.20results.20about.20the.20Cantor.20set/with/543560670) Moves: - Mathlib.Topology.Instances.CantorSet -> Mathlib.Topology.Instances.CantorSet.Basic --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor merge-conflict file-removed awaiting-author t-topology 355/2 Mathlib.lean,Mathlib/Topology/Instances/CantorSet/Basic.lean,Mathlib/Topology/Instances/CantorSet/Cardinality.lean,Mathlib/Topology/Instances/CantorSet/Lemmas.lean 4 5 ['github-actions', 'grunweg', 'kckennylau', 'mathlib4-merge-conflict-bot'] nobody
206-39054
6 months ago
227-21683
227 days ago
0-2409
40 minutes
30303 franv314
author:franv314
 chore(Topology/Instances): add deprecated module Add deprecated module to moved Cantor set file. --- - [ ] depends on: #30299 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict blocked-by-other-PR new-contributor 486/124 Mathlib.lean,Mathlib/Topology/Instances/CantorSet.lean,Mathlib/Topology/Instances/CantorSet/Basic.lean,Mathlib/Topology/Instances/CantorSet/Cardinality.lean,Mathlib/Topology/Instances/CantorSet/Lemmas.lean 5 3 ['github-actions', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
206-39052
6 months ago
227-19552
227 days ago
0-340
5 minutes
30575 urkud
author:urkud
 feat: lemmas about `_ • _` on Filters as well as `Set.Finite.f?derivWithin_eq`. I wrote these lemmas for #24019, but the final version of that PR doesn't need them. I moved them here so that I don't forget to prepare a non-draft PR with these lemmas. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-topology 51/0 Mathlib/Topology/TODO.lean 1 3 ['github-actions', 'plp127', 'urkud'] nobody
206-18220
6 months ago
unknown
0-0
0 seconds
27976 smmercuri
author:smmercuri
 feat: `ramificationIdx` for `NumberField.InfinitePlace` This PR continues the work from #24884. Original PR: https://github.com/leanprover-community/mathlib4/pull/24884 merge-conflict WIP t-number-theory 22/0 Mathlib/NumberTheory/NumberField/InfinitePlace/Ramification.lean 1 2 ['github-actions', 'mathlib4-merge-conflict-bot'] nobody
205-24894
6 months ago
290-40879
290 days ago
0-57
57 seconds
26357 javra
author:javra
 feat(CategoryTheory): linear categories as `ModuleCat R`-enriched categories Continues #23826. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict awaiting-author t-category-theory large-import 197/0 Mathlib.lean,Mathlib/Algebra/Category/ModuleCat/Monoidal/Basic.lean,Mathlib/CategoryTheory/Enriched/Linear.lean,Mathlib/CategoryTheory/Linear/Basic.lean,Mathlib/CategoryTheory/Monoidal/Linear.lean 5 10 ['adamtopaz', 'github-actions', 'javra', 'mathlib4-merge-conflict-bot'] adamtopaz
assignee:adamtopaz
203-69889
6 months ago
248-10142
248 days ago
78-29556
78 days
26085 grunweg
author:grunweg
 feat: disjoint unions distribute with products of manifolds This PR continues the work from #22611. Original PR: https://github.com/leanprover-community/mathlib4/pull/22611 please-adopt WIP t-differential-geometry merge-conflict 75/6 Mathlib/Geometry/Manifold/Diffeomorph.lean,Mathlib/Geometry/Manifold/LocalDiffeomorph.lean 2 3 ['github-actions', 'grunweg', 'mathlib4-merge-conflict-bot'] nobody
203-41892
6 months ago
338-32694
338 days ago
0-74
1 minute
27180 ADedecker
author:ADedecker
 feat: quotient of a monoid with zero by a multiplicative congruence --- My motivation is getting a more conceptual construction of [ValuativeRel.ValueGroupWithZero](https://leanprover-community.github.io/mathlib4_docs/Mathlib/RingTheory/Valuation/ValuativeRel.html#ValuativeRel.ValueGroupWithZero), but I think this is of independent interest. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-algebra delegated
label:t-algebra$
 141/26 Mathlib.lean,Mathlib/Data/Quot.lean,Mathlib/Data/Setoid/Basic.lean,Mathlib/GroupTheory/Congruence/Defs.lean,Mathlib/GroupTheory/Congruence/GroupWithZero.lean 5 32 ['ADedecker', 'eric-wieser', 'github-actions', 'mathlib-bors', 'mathlib4-merge-conflict-bot', 'ocfnash'] ocfnash
assignee:ocfnash
203-30628
6 months ago
282-46163
282 days ago
28-12053
28 days
29570 eric-wieser
author:eric-wieser
 fix: substitute infotrees in linters I don't know whether this is necessary in these particular cases, but I've seen places where it is. There are a handful more of these cases in Batteries. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict 2/2 Mathlib/Tactic/Linter/Style.lean,Mathlib/Tactic/TacticAnalysis.lean 2 2 ['github-actions', 'mathlib4-merge-conflict-bot'] nobody
203-27129
6 months ago
unknown
0-0
0 seconds
30790 urkud
author:urkud
 chore: partially migrate from `ContinuousMap.continuous` ... to `map_continuous` or `by fun_prop`. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict 37/45 Mathlib/AlgebraicGeometry/Morphisms/Constructors.lean,Mathlib/AlgebraicTopology/FundamentalGroupoid/Basic.lean,Mathlib/AlgebraicTopology/FundamentalGroupoid/FundamentalGroup.lean,Mathlib/Analysis/CStarAlgebra/ContinuousFunctionalCalculus/Restrict.lean,Mathlib/Analysis/Complex/Circle.lean,Mathlib/Analysis/Fourier/AddCircleMulti.lean,Mathlib/Condensed/Light/TopCatAdjunction.lean,Mathlib/Condensed/TopCatAdjunction.lean,Mathlib/Condensed/TopComparison.lean,Mathlib/Dynamics/Ergodic/Action/OfMinimal.lean,Mathlib/MeasureTheory/Constructions/BorelSpace/Basic.lean,Mathlib/Topology/Category/CompHausLike/Limits.lean,Mathlib/Topology/Compactification/OnePoint/Basic.lean,Mathlib/Topology/Compactness/CompactlyGeneratedSpace.lean,Mathlib/Topology/ContinuousMap/CompactlySupported.lean,Mathlib/Topology/ContinuousMap/Units.lean,Mathlib/Topology/ContinuousMap/ZeroAtInfty.lean,Mathlib/Topology/LocallyConstant/Basic.lean,Mathlib/Topology/PartitionOfUnity.lean,Mathlib/Topology/Sets/Opens.lean,Mathlib/Topology/TietzeExtension.lean,Mathlib/Topology/UniformSpace/CompactConvergence.lean,Mathlib/Topology/UniformSpace/Dini.lean,Mathlib/Topology/UrysohnsLemma.lean 24 6 ['erdOne', 'github-actions', 'mathlib4-merge-conflict-bot', 'urkud'] nobody
203-26432
6 months ago
212-13214
212 days ago
0-12151
3 hours
30631 ADedecker
author:ADedecker
 refactor: evaluation of power series in semirings --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) 665/71 Mathlib/Algebra/Module/Congruence/Defs.lean,Mathlib/RingTheory/MvPowerSeries/EvaluationSemi.lean,Mathlib/Topology/Algebra/LinearTopology.lean,Mathlib/Topology/Algebra/LinearUniformity.lean,Mathlib/Topology/Algebra/TopologicallyNilpotent.lean 5 1 ['github-actions'] nobody
202-26382
6 months ago
unknown
0-0
0 seconds
29871 zach1502
author:zach1502
 feat(Matrix/Transvection): Gauss pivot determinant identity and pivot preservation This PR adds two lemmas formalizing standard Gaussian pivot identities: * `Matrix.Transvection.listTransvecCol_mul_mul_listTransvecRow_pivot`: After applying the canonical left/right transvection products that clear the last column and row, the pivot (bottom-right) entry of a matrix is unchanged. Marked `@[simp]`. * `Matrix.Transvection.det_eq_detTopLeft_mul_pivot`: If the pivot entry is nonzero, then the determinant of the matrix factors as the determinant of the top-left block times the pivot entry, after performing the canonical transvections. This is the usual Gauss–pivot determinant identity. * Added simple usage tests in `MathlibTest/matrix.lean` to check that the new lemmas are usable by `simp`/`simpa`. --- --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) awaiting-author t-algebra new-contributor
label:t-algebra$
 94/0 Mathlib/LinearAlgebra/Matrix/Transvection.lean,MathlibTest/matrix.lean 2 3 ['github-actions', 'riccardobrasca', 'zach1502'] nobody
200-38575
6 months ago
200-38575
200 days ago
41-53449
41 days
25692 Whysoserioushah
author:Whysoserioushah
 feat(RingTheory/MatrixAlgebra): add a more general version of `matrixEquivTensor` This adds `tensorMatrixLinearEquiv : A ⊗[R] Matrix n n B ≃ₐ[S] Matrix n n (A ⊗[R] B)` which is a more general version of `matrixEquivTensor : Matrix n n A ≃ₐ[R] (A ⊗[R] Matrix n n R)`. The latter is then implemented as a trivial consequence of the former. Many internal implementation details are deleted without deprecation, although strictly these were not private. Co-authored-by: @erdOne Co-authored-by: Eric Wieser --- - [ ] depends on: #28367 - [ ] depends on: #28359 - [ ] depends on: #28368 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict awaiting-author t-ring-theory 129/110 Mathlib/RingTheory/MatrixAlgebra.lean 1 28 ['Whysoserioushah', 'chrisflav', 'eric-wieser', 'github-actions', 'jcommelin', 'mathlib-bors', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot', 'mattrobball'] chrisflav
assignee:chrisflav
200-26152
6 months ago
276-49048
276 days ago
47-13209
47 days
25012 urkud
author:urkud
 refactor(*): migrate from `Matrix.toLin'` to `Matrix.mulVecLin` or `Matrix.mulVec` whenever we don't need the `LinearEquiv.symm` part. See [Zulip discussion](https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/Matrix.2EtoLin'.20vs.20Matrix.2EmulVecLin/with/515188548). It makes sense to have only one normal form, and `Matrix.toLin'` has an extra `DecidableEq` assumption. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict 165/126 Mathlib/Algebra/Lie/Matrix.lean,Mathlib/Algebra/Module/Equiv/Basic.lean,Mathlib/Analysis/CStarAlgebra/Matrix.lean,Mathlib/Analysis/Matrix.lean,Mathlib/Combinatorics/SimpleGraph/LapMatrix.lean,Mathlib/LinearAlgebra/Basis/Defs.lean,Mathlib/LinearAlgebra/Determinant.lean,Mathlib/LinearAlgebra/Finsupp/VectorSpace.lean,Mathlib/LinearAlgebra/Matrix/BilinearForm.lean,Mathlib/LinearAlgebra/Matrix/Charpoly/Minpoly.lean,Mathlib/LinearAlgebra/Matrix/Diagonal.lean,Mathlib/LinearAlgebra/Matrix/Gershgorin.lean,Mathlib/LinearAlgebra/Matrix/Rank.lean,Mathlib/LinearAlgebra/Matrix/SesquilinearForm.lean,Mathlib/LinearAlgebra/Matrix/SpecialLinearGroup.lean,Mathlib/LinearAlgebra/Matrix/ToLin.lean,Mathlib/LinearAlgebra/Matrix/ToLinearEquiv.lean,Mathlib/LinearAlgebra/UnitaryGroup.lean,Mathlib/MeasureTheory/Measure/Lebesgue/Basic.lean 19 4 ['github-actions', 'leanprover-community-bot-assistant', 'mathlib4-merge-conflict-bot'] nobody
200-8553
6 months ago
348-34031
348 days ago
14-81673
14 days
29638 yuma-mizuno
author:yuma-mizuno
 feat(CategoryTheory): define descent data by presieves --- Addendum: I realized that there is prior work in #24434. Since this PR uses a slightly different definition, I plan to make this PR a follow-up to #24434. Until then, I’ll keep it marked as WIP. See the comment: https://github.com/leanprover-community/mathlib4/pull/29638#issuecomment-3290041719 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict WIP t-category-theory 408/2 Mathlib.lean,Mathlib/CategoryTheory/Bicategory/Functor/Pseudofunctor.lean,Mathlib/CategoryTheory/Bicategory/LocallyDiscrete.lean,Mathlib/CategoryTheory/Category/Cat.lean,Mathlib/CategoryTheory/Stack/Basic.lean,Mathlib/CategoryTheory/Stack/Descent.lean 6 7 ['chrisflav', 'github-actions', 'joelriou', 'mathlib4-merge-conflict-bot', 'yuma-mizuno'] nobody
200-4650
6 months ago
250-35000
250 days ago
0-74
1 minute
30158 nicolaviolette
author:nicolaviolette
 feat: combinatorics simplegraph basic --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) awaiting-author t-combinatorics new-contributor 9/4 Mathlib/Combinatorics/SimpleGraph/Basic.lean 1 3 ['b-mehta', 'github-actions'] b-mehta
assignee:b-mehta
199-58105
6 months ago
199-58105
199 days ago
31-69826
31 days
28132 dupuisf
author:dupuisf
 feat: preliminary `grind` tags for `IsUnit` This PR adds preliminary `grind` tags for the `IsUnit` predicate. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-algebra
label:t-algebra$
 61/17 Mathlib/Algebra/Group/Action/Units.lean,Mathlib/Algebra/Group/Units/Defs.lean,Mathlib/Algebra/GroupWithZero/Units/Basic.lean,Mathlib/Algebra/Ring/Units.lean,Mathlib/Analysis/CStarAlgebra/ContinuousFunctionalCalculus/Order.lean,Mathlib/Analysis/SpecialFunctions/ContinuousFunctionalCalculus/Rpow/Basic.lean 6 3 ['github-actions', 'mathlib4-merge-conflict-bot'] kim-em
assignee:kim-em
199-480
6 months ago
199-481
199 days ago
80-71575
80 days
25903 pfaffelh
author:pfaffelh
 feat(MeasureTheory): finite unions of sets in a semi-ring (in terms of measure theory) form a ring : Finite unions of sets in a semi-ring (in terms of measure theory) form a ring The set containing finite unions of sets in a semi-ring are a ring. Part of `MeasureTheory.SetSemiring` is moved to the new file `MeasureTheory.SetRing`. --- - [ ] depends on: #25902 [contains changes in `SetSemiring` as well] --- *This PR continues the work from #23117.* *Original PR: https://github.com/leanprover-community/mathlib4/pull/23117* merge-conflict blocked-by-other-PR large-import t-measure-probability 648/131 Mathlib.lean,Mathlib/Algebra/Group/Pointwise/Finset/Basic.lean,Mathlib/Algebra/Module/Bimodule.lean,Mathlib/Data/Set/Lattice.lean,Mathlib/Data/Set/Pairwise/Lattice.lean,Mathlib/Data/Set/Prod.lean,Mathlib/MeasureTheory/MeasurableSpace/Pi.lean,Mathlib/MeasureTheory/Measure/AddContent.lean,Mathlib/MeasureTheory/PiSystem.lean,Mathlib/MeasureTheory/SetAlgebra.lean,Mathlib/MeasureTheory/SetRing.lean,Mathlib/MeasureTheory/SetSemiring.lean,Mathlib/Tactic.lean,Mathlib/Tactic/ExtractLets.lean,lake-manifest.json,lakefile.lean 16 5 ['github-actions', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
198-74592
6 months ago
276-85138
276 days ago
0-11144
3 hours
28863 yury-harmonic
author:yury-harmonic
 ignore: make CI build oleans It looks like CI doesn't build oleans unless I open a PR. Or I can't see this workflow. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict large-import 624/100 Mathlib/Algebra/MvPolynomial/Eval.lean,Mathlib/Algebra/MvPolynomial/Expand.lean,Mathlib/Algebra/Order/Floor/Semifield.lean,Mathlib/Algebra/Order/Positive/Field.lean,Mathlib/Algebra/Order/Positive/Ring.lean,Mathlib/Data/Int/ModEq.lean,Mathlib/Data/NNRat/Floor.lean,Mathlib/Data/Nat/Factorial/Basic.lean,Mathlib/Data/Nat/ModEq.lean,Mathlib/Data/Nat/NthRoot/Defs.lean,Mathlib/Data/Rat/Floor.lean,Mathlib/Tactic/NormNum/Basic.lean,MathlibTest/norm_num_ext.lean 13 4 ['github-actions', 'grunweg', 'mathlib4-merge-conflict-bot'] nobody
198-54603
6 months ago
unknown
0-0
0 seconds
29992 vlad902
author:vlad902
 feat(Order): finite (Max)Chains always contains a top/max element --- - [ ] depends on: #29835 [optional extra text] - [ ] depends on: #29993 [optional extra text] [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict WIP t-order large-import 35/0 Mathlib/Order/Preorder/Chain.lean 1 3 ['github-actions', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
197-20284
6 months ago
238-52645
238 days ago
0-56
56 seconds
26901 5hv5hvnk
author:5hv5hvnk
 feat: a simproc version of `compute_degree` Wrap `compute_degree` in a simproc for use by simp. Closes #22219. --- awaiting-CI new-contributor merge-conflict awaiting-author t-meta 198/0 Mathlib.lean,Mathlib/Tactic/Simproc/PolynomialDegree.lean,MathlibTest/polynomial_degree_simproc.lean 3 19 ['5hv5hvnk', 'YaelDillies', 'adomani', 'github-actions', 'mathlib4-merge-conflict-bot'] nobody
197-18373
6 months ago
315-35367
315 days ago
2-71043
2 days
26391 grunweg
author:grunweg
 feat: immersed submanifolds Still under construction --- - [ ] depends on: #26087 - [ ] depends on: #23040 Better version of #24549. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict WIP t-differential-geometry blocked-by-other-PR 1418/0 Mathlib.lean,Mathlib/Analysis/NormedSpace/HahnBanach/Splits.lean,Mathlib/Geometry/Manifold/EmbeddedSubmanifold.lean,Mathlib/Geometry/Manifold/IsImmersionEmbedding.lean,Mathlib/Geometry/Manifold/MSplits.lean 5 3 ['github-actions', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
197-5133
6 months ago
unknown
0-0
0 seconds
31020 grunweg
author:grunweg
 feat: mfderiv of Sum.inl and Sum.inr Nothing to see yet: waiting on the cache, then I will state the sorries and Newell Jansen has expressed interest in trying to prove this. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict WIP 64/0 Mathlib/Geometry/Manifold/MFDeriv/SpecificFunctions.lean 1 4 ['github-actions', 'mathlib4-merge-conflict-bot'] nobody
197-3901
6 months ago
206-18380
206 days ago
0-1
1 second
31340 kim-em
author:kim-em
 feat: helper script to summarize CI errors --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) CI 235/0 scripts/README.md,scripts/failing_ci.py 2 1 ['github-actions'] nobody
196-76455
6 months ago
unknown
0-0
0 seconds
25775 emilyriehl
author:emilyriehl
 feat(AlgebraicTopology/SimplicialSet/NerveAdjunction): to Strict Segal 2 Under a suitable hypothesis, a map of 2-truncated simplicial sets can be generated from a refl prefunctor between the underlying reflexive quivers --- provided the codomain is `StrictSegal`. This abstracts a previously formalized result that requires the codomain to be the 2-truncated nerve of a category. Co-authored-by: Aaron Liu --- The current draft displays the old code for comparison with new versions labeled ALT. After initial review this will be cut. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) --- *This PR continues the work from #23848.* *Original PR: https://github.com/leanprover-community/mathlib4/pull/23848* t-algebraic-topology t-category-theory merge-conflict awaiting-author infinity-cosmos 421/206 Mathlib/AlgebraicTopology/SimplexCategory/Basic.lean,Mathlib/AlgebraicTopology/SimplexCategory/Defs.lean,Mathlib/AlgebraicTopology/SimplicialSet/HomotopyCat.lean,Mathlib/AlgebraicTopology/SimplicialSet/NerveAdjunction.lean,Mathlib/AlgebraicTopology/SimplicialSet/StrictSegal.lean,Mathlib/CategoryTheory/ComposableArrows.lean,Mathlib/CategoryTheory/EqToHom.lean 7 38 ['emilyriehl', 'github-actions', 'joelriou', 'leanprover-community-bot-assistant', 'mathlib4-merge-conflict-bot', 'robin-carlier'] robin-carlier
assignee:robin-carlier
194-19711
6 months ago
275-12437
275 days ago
17-16247
17 days
26827 pechersky
author:pechersky
 feat(Analysis/Normed/ValuativeRel): helper instance for NormedField --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) - [x] depends on: #26713 - [x] depends on: #26826 merge-conflict t-algebra t-number-theory t-analysis
label:t-algebra$
 211/27 Mathlib.lean,Mathlib/Analysis/Normed/ValuativeRel.lean,Mathlib/Topology/Algebra/Valued/ValuativeRel.lean 3 34 ['ADedecker', 'adamtopaz', 'erdOne', 'github-actions', 'kbuzzard', 'kckennylau', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot', 'pechersky'] kbuzzard
assignee:kbuzzard
191-29084
6 months ago
191-29084
191 days ago
122-64394
122 days
30150 imbrem
author:imbrem
 feat(CategoryTheory/Monoidal): to_additive for MonoidalCategory Add `AddMonoidalCategory`, the additive version of `MonoidalCategory`. To get this to work, I needed to _remove_ the `to_additive` attributes in `Discrete.lean`, since existing code relies on the `AddMonoid M → MonoidalCategory M` instance. For now, we simply implement the additive variants by hand instead. --- As discussed in #28718; I added an `AddMonoidalCategory` struct and tagged `MonoidalCategory` with `to_additive`, along with the lemmas in `Category.lean`. I think this is the right approach, since under this framework the "correct" additive version of `Discrete.lean` would be mapping an `AddMonoid` to an `AddMonoidalCategory`. Next steps would be to: - Make `monoidal_coherence` and `coherence` support `AddMonoidalCategory` - Add `CocartesianMonoidalCategory` extending `AddMonoidalCategory` [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-category-theory large-import new-contributor merge-conflict awaiting-zulip t-meta 444/125 Mathlib/CategoryTheory/Monoidal/Category.lean,Mathlib/CategoryTheory/Monoidal/Discrete.lean,Mathlib/Tactic/ToAdditive/GuessName.lean 3 22 ['JovanGerb', 'YaelDillies', 'github-actions', 'imbrem', 'mathlib4-merge-conflict-bot'] nobody
190-67764
6 months ago
230-46430
230 days ago
1-160
1 day
27135 JovanGerb
author:JovanGerb
 feat: `gconvert` tactic The `gconvert` tactic calls `gcongr` internally, and it can be used as replacement/generalization of `peel`. One drawback is that `peel` can unfold definitions until they are a binder, while `gconvert` cannot, but I think this is acceptable. TODO: replace all uses of `peel` with either `gconvert` or `congr!` --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-meta 320/17 Mathlib/Tactic/GCongr/Core.lean,MathlibTest/GConvert.lean 2 2 ['github-actions', 'mathlib4-merge-conflict-bot'] nobody
190-10509
6 months ago
312-25106
312 days ago
0-5
5 seconds
25765 JovanGerb
author:JovanGerb
 feat(gcongr): lemma for rewriting inside divisibility TODO: add test to show that we can rewrite using `a ≡ b [ZMOD n]` inside `n ∣ 2 * a + 1`. edit: it's not yet entirely clear if this is the right thing to do. edit: This lemma should be written using iff (or =), so that we can use it specifically when rewriting with a symmetric relation. Supporting equality in `gcongr` is still work in progress. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) delegated t-data 5/0 Mathlib/Data/Int/ModEq.lean 1 3 ['fpvandoorn', 'github-actions', 'mathlib-bors'] nobody
189-40630
6 months ago
343-26910
343 days ago
1-19951
1 day
30978 dagurtomas
author:dagurtomas
 Draft: adic spaces --- This is work in progress, mostly ported from the perfectoid project [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict large-import 1407/45 Mathlib.lean,Mathlib/AdicSpace/AdicSpace.lean,Mathlib/AdicSpace/HuberPair.lean,Mathlib/AdicSpace/Spa/RationalOpenData.lean,Mathlib/AdicSpace/Spa/StalkValuation.lean,Mathlib/AdicSpace/Spa/StructurePresheaf.lean,Mathlib/AdicSpace/Spv.lean,Mathlib/Topology/Category/TopCommRingCat.lean 8 2 ['github-actions', 'mathlib4-merge-conflict-bot'] nobody
189-22063
6 months ago
207-14882
207 days ago
0-12
12 seconds
30824 grunweg
author:grunweg
 wip: another smoothness lemma for local frames --- Can I prove in general that the coefficients of a smooth section w.r.t. a smooth local frame are smooth? This is certainly true for orthonormal frames... [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict WIP t-differential-geometry 57/9 Mathlib/Geometry/Manifold/VectorBundle/LocalFrame.lean 1 3 ['github-actions', 'grunweg', 'mathlib4-merge-conflict-bot'] nobody
188-10401
6 months ago
211-21878
211 days ago
0-6
6 seconds
30770 robertmaxton42
author:robertmaxton42
 (WIP) Limits and Colimits in Quiv WIP PR for the oleans --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict WIP 3652/31 Mathlib.lean,Mathlib/CategoryTheory/Category/Quiv.lean,Mathlib/CategoryTheory/Category/Quiv/AsFunctor/Defs.lean,Mathlib/CategoryTheory/Category/Quiv/Colimits.lean,Mathlib/CategoryTheory/Category/Quiv/Limits.lean,Mathlib/CategoryTheory/Category/Quiv/Shapes.lean,Mathlib/CategoryTheory/Category/Quiv/WalkingQuiver.lean,Mathlib/CategoryTheory/EqToHom.lean,Mathlib/CategoryTheory/Equivalence.lean,Mathlib/CategoryTheory/Filtered/Level.lean,Mathlib/CategoryTheory/Limits/Constructions/LimitsOfProductsAndEqualizers.lean,Mathlib/CategoryTheory/Limits/FunctorCategory/Basic.lean,Mathlib/CategoryTheory/Limits/Shapes/FunctorToTypes.lean,Mathlib/CategoryTheory/Limits/Types/Colimits.lean,Mathlib/CategoryTheory/ObjectProperty/FullSubcategory.lean,Mathlib/CategoryTheory/Topos/Classifier.lean,Mathlib/CategoryTheory/Topos/Presheaf.lean,Mathlib/Combinatorics/Quiver/Shapes.lean,Mathlib/Combinatorics/Quiver/WalkingQuiver.lean,Mathlib/Data/ULift.lean,Mathlib/Logic/Equiv/Basic.lean,Mathlib/Logic/Equiv/Sum.lean,Mathlib/Logic/Small/Defs.lean 23 2 ['github-actions', 'mathlib4-merge-conflict-bot'] nobody
186-67229
6 months ago
unknown
0-0
0 seconds
31593 Ruben-VandeVelde
author:Ruben-VandeVelde
 feat: some lemmas about MonoidAlgebra --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict awaiting-author t-algebra
label:t-algebra$
 26/0 Mathlib/Algebra/MonoidAlgebra/Basic.lean 1 5 ['github-actions', 'mathlib4-merge-conflict-bot', 'robin-carlier', 'themathqueen'] nobody
186-60879
6 months ago
189-30139
189 days ago
0-85235
23 hours
26885 pechersky
author:pechersky
 feat(Topology/ValuativeRel): ValuativeTopology 𝒪[K] and even when not a field, `ValuativeRel 𝒪[K]` This is an example of something achievable with the new declarations that wasn't possible with Valued Such that we can discuss the valuations on the subring without always using coercions But to achieve this, one needs some juggling of the value groups --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) - [x] depends on: #26834 - [ ] depends on : #30135 t-algebra t-number-theory t-topology
label:t-algebra$
 66/0 Mathlib/Topology/Algebra/Valued/ValuativeRel.lean 1 10 ['erdOne', 'github-actions', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot', 'pechersky'] alreadydone
assignee:alreadydone
186-13625
6 months ago
186-26645
186 days ago
131-51114
131 days
15651 TpmKranz
author:TpmKranz
 feat(Computability/NFA): operations for Thompson's construction Lays the groundwork for a proof of equivalence of RE and NFA, w.r.t. described language. Actual connection to REs comes later, after the groundwork for the opposite direction has been laid. Third chunk of #12648 --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor t-computability merge-conflict awaiting-author awaiting-zulip 307/5 Mathlib/Computability/NFA.lean 1 27 ['TpmKranz', 'YaelDillies', 'dupuisf', 'github-actions', 'leanprover-community-bot-assistant', 'meithecatte', 'rudynicolop'] nobody
185-84896
6 months ago
605-25884
605 days ago
45-84611
45 days
12032 mcdoll
author:mcdoll
 feat: delta distribution as a limit --- - [ ] depends on: #11496 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) WIP t-analysis 58/0 Mathlib/Analysis/Distribution/DiracDelta.lean 1 2 ['github-actions', 'mathlib4-dependent-issues-bot'] nobody
185-67870
6 months ago
773-26036
773 days ago
0-1
1 second
9693 madvorak
author:madvorak
 feat: Linear programming in the standard form --- Zulip discussion: https://leanprover.zulipchat.com/#narrow/stream/144837-PR-reviews/topic/.237386.20Linear.20Programming Four PRs incompatible with each other: https://github.com/leanprover-community/mathlib4/pull/7386 (list of constraints) https://github.com/leanprover-community/mathlib4/pull/9693 (matrix form) https://github.com/leanprover-community/mathlib4/pull/10026 (Antoine Chambert-Loir's def; semirings, linear) https://github.com/leanprover-community/mathlib4/pull/10159 (Antoine Chambert-Loir's def; rings, affine) - [x] depends on: #9652 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict WIP t-algebra RFC
label:t-algebra$
 86/0 Mathlib.lean,Mathlib/LinearAlgebra/Matrix/LinearProgramming.lean 2 15 ['apurvanakade', 'github-actions', 'leanprover-community-mathlib4-bot', 'madvorak', 'mathlib4-merge-conflict-bot'] nobody
185-32242
6 months ago
688-40234
688 days ago
168-78821
168 days
15649 TpmKranz
author:TpmKranz
 feat(Computability): introduce Generalised NFA as bridge to Regular Expression Lays the groundwork for a proof of equivalence of NFA and RE, w.r.t. described language. Actual connection to NFA comes later, after the groundwork for the opposite direction has been laid. Second chunk of #12648 --- - [x] depends on: #15647 [Data.FinEnum.Option unchanged since then] [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor t-computability merge-conflict awaiting-author awaiting-zulip 298/0 Mathlib.lean,Mathlib/Computability/GNFA.lean,Mathlib/Computability/Language.lean,Mathlib/Computability/RegularExpressions.lean,docs/references.bib 5 7 ['github-actions', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot', 'meithecatte', 'trivial1711'] nobody
185-14737
6 months ago
530-64667
530 days ago
23-54870
23 days
4786 thorimur
author:thorimur
 feat: AppBuilder utils This supplements `Lean.Meta.AppBuilder`, introducing variants of `mkAppN` and `mkAppM` which allow for more fine-grained management of existing and created metavariables. [Description pending] --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-meta 205/0 Mathlib.lean,Mathlib/Lean/Meta/AppBuilder.lean 2 1 ['mathlib4-merge-conflict-bot'] nobody
184-52597
6 months ago
unknown
0-0
0 seconds
5745 alexjbest
author:alexjbest
 feat: a tactic to consume type annotations, and make constructor nicer During the copenhagen masterclass I found some situations where applying the constructor tactic left the goal in a difficult to read state when autoParams were present. We add a simple tactic to clean these up, and a macro for `constructor` to behave more like the constructor notation and do this automatically (constructor is in core) It seems that these things should be cleaned up by simp, but a simp lemma to remove these annotations is not accepted by lean as the types are too similar. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict awaiting-author t-meta 41/0 Mathlib.lean,Mathlib/Tactic.lean,Mathlib/Tactic/Consume.lean,test/consume.lean 4 5 ['alexjbest', 'digama0', 'kim-em', 'kmill', 'mathlib4-merge-conflict-bot'] nobody
184-52596
6 months ago
999-75458
999 days ago
51-33889
51 days
5863 eric-wieser
author:eric-wieser
 feat: add elaborators for concrete matrices --- - [x] depends on: #5866 - [ ] depends on: #5897 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict help-wanted blocked-by-other-PR t-meta 257/7 Mathlib/Control/Monad/Cont.lean,Mathlib/Data/Matrix/Auto.lean,MathlibTest/matrix_auto.lean 3 8 ['eric-wieser', 'github-actions', 'kim-em', 'leanprover-community-bot-assistant', 'mathlib4-merge-conflict-bot'] nobody
184-52595
6 months ago
1044-32256
1044 days ago
0-1
1 second
5919 MithicSpirit
author:MithicSpirit
 feat: implement orthogonality for AffineSubspace Define `AffineSubspace.orthogonal` and `AffineSubspace.IsOrtho`, as well as develop an API emulating that of `Submodule.orthogonal` and `Submodule.IsOrtho`, respectively. Additionally, provide some relevant lemmas exclusive to affine subspaces, which are mostly to do with the relationship between orthogonality and `AffineSubspace.Parallel`. Closes #5539 --- Still WIP as I need to add more docstrings as well as notations for the new definitions. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) WIP new-contributor merge-conflict help-wanted t-analysis 287/0 Mathlib.lean,Mathlib/Analysis/InnerProductSpace/AffineSubspace.lean 2 7 ['MithicSpirit', 'eric-wieser', 'github-actions', 'leanprover-community-bot-assistant', 'mathlib4-merge-conflict-bot'] MithicSpirit
assignee:MithicSpirit
184-52594
6 months ago
867-77489
867 days ago
0-433
7 minutes
7386 madvorak
author:madvorak
 feat: Define linear programs Linear programs over a general `Module` with constraints given in the form "aᵀx - b ≥ 0" and the objective function as an `AffineMap` to be minimized. --- Zulip discussion: https://leanprover.zulipchat.com/#narrow/stream/144837-PR-reviews/topic/.237386.20Linear.20Programming Four PRs incompatible with each other: https://github.com/leanprover-community/mathlib4/pull/7386 (list of constraints) https://github.com/leanprover-community/mathlib4/pull/9693 (matrix form) https://github.com/leanprover-community/mathlib4/pull/10026 (Antoine Chambert-Loir's def; semirings, linear) https://github.com/leanprover-community/mathlib4/pull/10159 (Antoine Chambert-Loir's def; rings, affine) [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict WIP t-algebra RFC
label:t-algebra$
 87/0 Mathlib.lean,Mathlib/LinearAlgebra/LinearProgramming.lean 2 64 ['Shreyas4991', 'YaelDillies', 'eric-wieser', 'github-actions', 'kim-em', 'madvorak', 'mathlib4-merge-conflict-bot'] nobody
184-52591
6 months ago
688-40222
688 days ago
232-74885
232 days
7890 grhkm21
author:grhkm21
 feat(Mathlib/Tactic/Setm): implement setm tactic This is my first time doing metaprogramming in Lean 4, please provide feedback when you have them :) The `setm` tactic, which stands for `set` + matching, matches a given expression with the goal and introduces new local hypotheses for the named holes specified. One of the best usage is for rearrangement proofs. As a simple example, ```lean example : (1 + 1) + (4 * 3) - (1 + 1) = (3 * 4 : Rat) := by setm ?A + ?B - ?A = (?C : Rat) rw [show ∀ A B, A + B - A = B by intro A B ; ring_nf ] apply Rat.mul_comm ``` One can imagine replacing the three term expression with a 7 term algebraic expression. This was developed with tons of help from [Zulip](https://leanprover.zulipchat.com/#narrow/stream/239415-metaprogramming-.2F-tactics/topic/Help.20with.20writing.20tactic), especially from Thomas. Thanks! TODO: - [X] Support `setm ... at ...` syntax, see *example 1* below - [X] Write docs - [ ] Use `withNewMCtxDepth` - [X] Rename the intermediate `MVar`s, see *example 2* below - [ ] Use `elabTermWithHolesPostponing` in conjunction with `Term.synthesizeSyntheticMVarsNoPostPoning` after `isDefEq` to handle instances Example 1: ```lean /- Usage with `using` and `at` keywords -/ example (h1 : 1 + 1 = 3) (h2 : 1 + 3 = 5) (h3 : 2 + 2 = 5) : true := by setm ?A + _ = (?B : Nat) using h2 at h1 h2 h3 guard_hyp A := 1 guard_hyp B := 5 guard_hyp h1 : A + A = 3 guard_hyp h2 : A + 3 = B guard_hyp h3 : 2 + 2 = B trivial ``` Example 2: ```lean /- Test reusing named holes -/ example (h : b + a = c) : a + b = c := by /- setm 1-/ setm ?A + ?B = (_ : Nat) guard_hyp A := a guard_hyp B := b /- clean up -/ unfold_let A B clear hA hB A B /- setm 2 -/ rewrite [Nat.add_comm] setm ?A + ?B = (_ : Nat) at h ⊢ guard_hyp A := b guard_hyp B := a exact h ``` Co-authored-by: Jireh Loreaux [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-meta 141/0 Mathlib.lean,Mathlib/Tactic/Common.lean,Mathlib/Tactic/Setm.lean,test/Setm.lean 4 4 ['mathlib4-merge-conflict-bot', 'thorimur'] nobody
184-52590
6 months ago
941-52366
941 days ago
0-104
1 minute
9352 chenyili0818
author:chenyili0818
 feat: arithmetic lemmas for `gradient` This file is based on Mathlib.Analysis.Calculus.Gradient.Basic, and describes the calculation properties Co-authored-by: Ziyu Wang [tropicalfish910@gmail.com](mailto:tropicalfish910@gmail.com) --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict awaiting-author t-analysis 404/0 Mathlib.lean,Mathlib/Analysis/Calculus/Gradient/Lemmas.lean 2 31 ['chenyili0818', 'github-actions', 'jcommelin', 'mathlib4-merge-conflict-bot', 'sgouezel', 'winstonyin'] nobody
184-52466
6 months ago
822-30915
822 days ago
52-1358
52 days
9795 sinhp
author:sinhp
 feat: the type `Fib` of fibre of a function at a point This is the most basic file of the theory of fibred categories developed here: https://github.com/sinhp/LeanFibredCategories/tree/master --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict awaiting-author t-category-theory 74/0 Mathlib.lean,Mathlib/Data/Fiber.lean 2 18 ['adri326', 'joelriou', 'mathlib4-merge-conflict-bot', 'sinhp'] nobody
184-52465
6 months ago
854-48636
854 days ago
2-35530
2 days
10660 eric-wieser
author:eric-wieser
 feat(LinearAlgebra/CliffordAlgebra): construction from a basis This is adapted from https://github.com/eric-wieser/lftcm2023-clifford_algebra, which only worked for the special case of `Q = 0`. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict WIP awaiting-author t-algebra
label:t-algebra$
 573/0 Mathlib.lean,Mathlib/LinearAlgebra/CliffordAlgebra/Basis.lean 2 16 ['github-actions', 'mathlib4-merge-conflict-bot'] nobody
184-52461
6 months ago
unknown
0-0
0 seconds
10977 grunweg
author:grunweg
 feat: germs of smooth functions Define the space of germs of smooth functions (between manifolds). Endow it with a ring structure if the target manifold is a smooth ring (e.g., a Lie group or a field). From the sphere eversion project, rewritten by me. Co-authored-by: Patrick Massot ------- Particular questions for review - is the authorship/copyright information appropriate? (`PatrickMassot` created the file `SmoothGerm` which I adapted; I didn't trace this far back through sphere-eversion.) - is providing all the intermediate algebraic structures (such as, an additive subgroup) on the space of smooth germs useful in practice? (The sphere eversion project only needs a ring structure.) - any further particular API lemmas (e.g., around coercions) which would be good to add? --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-differential-geometry merge-conflict awaiting-author t-topology t-analysis 150/0 Mathlib.lean,Mathlib/Geometry/Manifold/Algebra/SmoothGerm.lean 2 34 ['YaelDillies', 'github-actions', 'grunweg', 'jcommelin', 'kim-em', 'mathlib4-merge-conflict-bot', 'mcdoll'] fpvandoorn
assignee:fpvandoorn
184-52460
6 months ago
633-28095
633 days ago
144-63944
144 days
10998 hmonroe
author:hmonroe
 feat(Logic): Arithmetization of partial recursive functions (toward Gödel's first incompleteness theorem) --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict awaiting-author t-logic 364/0 Mathlib.lean,Mathlib/Logic/Godel/PartArith.lean 2 4 ['Ruben-VandeVelde', 'YaelDillies', 'mathlib4-merge-conflict-bot'] nobody
184-52459
6 months ago
715-20987
715 days ago
99-83915
99 days
11890 adomani
author:adomani
 feat: the terminal refine linter A linter that warns on usages of `refine` and `refine'` as a finishing tactic. See this [Zulip discussion](https://leanprover.zulipchat.com/#narrow/stream/287929-mathlib4/topic/Usage.20of.20refine'). ### Conclusion of the experiment Systematic replacements of terminal `refine` with `exact` leads to an overall slow-down. --- - [ ] depends on: #15616 (disable the linter in downstream projects) [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-linter awaiting-author 77/0 Mathlib.lean,Mathlib/Tactic.lean,Mathlib/Tactic/Linter/TerminalRefineLinter.lean 3 15 ['adomani', 'github-actions', 'grunweg', 'joneugster', 'leanprover-bot', 'leanprover-community-mathlib4-bot', 'mathlib4-merge-conflict-bot', 'urkud'] nobody
184-52335
6 months ago
647-441
647 days ago
18-28993
18 days
11991 adomani
author:adomani
 draft: syntax data linter A linter that prints `SyntaxNodeKind`s and `Range`s for all the nodes of a command. See this [Zulip discussion](https://leanprover.zulipchat.com/#narrow/stream/217875-Is-there-code-for-X.3F/topic/undocumented.20things). --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict WIP 152/0 Mathlib.lean,Mathlib/Tactic.lean,Mathlib/Tactic/SyntaxDataLinter.lean 3 1 ['mathlib4-merge-conflict-bot'] nobody
184-52334
6 months ago
unknown
0-0
0 seconds
12006 adomani
author:adomani
 feat: the `suffa` tactic The `suffa` tactic. `suffa tac` runs the tactic sequence `tac` and returns a `Try this:` suggestion of the form `suffices [target_after_tac] by tac; assumption`. For example ```lean example {m n : Nat} (h : m = n) : 0 + m = n := by suffa rewrite [Nat.zero_add] assumption ``` suggests the replacement ```lean example {m n : Nat} (h : m = n) : 0 + m = n := by suffices m = n by rewrite [Nat.zero_add] assumption assumption ``` See [this thread](https://leanprover.zulipchat.com/#narrow/stream/113488-general/topic/Try.20this.3A.20suffices.20simpa) as well as [this message](https://leanprover.zulipchat.com/#narrow/stream/144837-PR-reviews/topic/.2311822.20flexible.20tactics.20linter/near/431895664). --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict awaiting-author t-meta 161/0 Mathlib.lean,Mathlib/Tactic.lean,Mathlib/Tactic/Suffa.lean,test/Suffa.lean 4 4 ['MoritzBeroRoos', 'YaelDillies', 'mathlib4-merge-conflict-bot'] nobody
184-52332
6 months ago
715-37710
715 days ago
59-762
59 days
13442 dignissimus
author:dignissimus
 feat: mabel tactic for multiplicative abelian groups Mabel tactic for multiplicative abelian groups (#10361) --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor merge-conflict modifies-tactic-syntax awaiting-author help-wanted t-meta 439/0 Mathlib.lean,Mathlib/Tactic.lean,Mathlib/Tactic/MAbel.lean,MathlibTest/mabel.lean 4 11 ['BoltonBailey', 'dignissimus', 'github-actions', 'joneugster', 'kbuzzard', 'mathlib4-merge-conflict-bot'] joneugster
assignee:joneugster
184-52330
6 months ago
634-44416
634 days ago
0-16
16 seconds
14237 js2357
author:js2357
 feat: Define the localization of a fractional ideal at a prime ideal Define the localization of a fractional ideal at a prime ideal, and prove some basic properties. --- This PR is part 3 out of 4 of a proof of `isDedekindDomain_iff_isDedekindDomainDvr`. Part 4 is available here: #14242 - [x] depends on: #14099 Part 1 - [x] depends on: #14216 Part 2 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict awaiting-author t-algebra new-contributor
label:t-algebra$
 230/0 Mathlib.lean,Mathlib/RingTheory/FractionalIdeal/LocalizedAtPrime.lean,Mathlib/RingTheory/Localization/Basic.lean 3 22 ['Vierkantor', 'YaelDillies', 'github-actions', 'js2357', 'kbuzzard', 'leanprover-community-bot-assistant', 'leanprover-community-mathlib4-bot', 'mathlib4-merge-conflict-bot'] Vierkantor
assignee:Vierkantor
184-52328
6 months ago
633-26151
633 days ago
6-3525
6 days
14345 digama0
author:digama0
 feat: the Dialectica category is monoidal closed - [x] depends on: #14274 The monoidal closed structure of the Dialectica category. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict awaiting-author t-category-theory 252/0 Mathlib.lean,Mathlib/CategoryTheory/Dialectica/Closed.lean 2 4 ['github-actions', 'kim-em', 'leanprover-community-mathlib4-bot', 'mathlib4-merge-conflict-bot'] nobody
184-52205
6 months ago
676-17759
676 days ago
12-20456
12 days
14727 jjaassoonn
author:jjaassoonn
 feat(RingTheory/Flat/CategoryTheory): a flat module has vanishing higher Tor groups [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict awaiting-author t-ring-theory 37/1 Mathlib/RingTheory/Flat/CategoryTheory.lean 1 4 ['github-actions', 'kim-em', 'mathlib4-merge-conflict-bot'] nobody
184-52203
6 months ago
673-86204
673 days ago
3-28223
3 days
14733 jjaassoonn
author:jjaassoonn
 feat(RingTheory/Flat/CategoryTheory): a module is flat iff tensoring preserves finite limits --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict awaiting-author t-ring-theory 99/1 Mathlib.lean,Mathlib/Algebra/Category/ModuleCat/Basic.lean,Mathlib/Algebra/Category/ModuleCat/Monoidal/RightExact.lean,Mathlib/RingTheory/Flat/CategoryTheory.lean 4 3 ['github-actions', 'kim-em', 'mathlib4-merge-conflict-bot'] nobody
184-52201
6 months ago
671-11665
671 days ago
6-6256
6 days
15055 sinhp
author:sinhp
 feat: the category of pointed objects of a concrete category This file defines the category of pointed objects of a concrete category. After this we will have the categories of pointed groups, pointed abelian groups, pointed groupoids, etc. To define `Pointed.functor`, we need to add the following "pullback" construction to the category of elements. ``` @[simps obj map] def pullback (F : D ⥤ Type w) (G : C ⥤ D) : (G ⋙ F).Elements ⥤ F.Elements where obj X := ⟨G.obj X.1, X.2⟩ map {X Y} f := ⟨G.map f.1, f.2⟩ ``` This is called pullback since the display map of `G ⋙ F` (i.e. `π (G ⋙ F)`) is a pullback of the display map of `F`. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict awaiting-author t-category-theory 185/0 Mathlib.lean,Mathlib/CategoryTheory/ConcreteCategory/Pointed.lean,Mathlib/CategoryTheory/Elements.lean 3 14 ['dagurtomas', 'github-actions', 'kim-em', 'mathlib4-merge-conflict-bot'] nobody
184-52200
6 months ago
660-37542
660 days ago
7-80557
7 days
15224 AnthonyBordg
author:AnthonyBordg
 feat(CategoryTheory/Sites): covering families and their associated Grothendieck topology Define covering families on a category and their associated Grothendieck topology by using the API for `Coverage`. Give an explicit characterization of the covering sieves of the said topology. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict awaiting-author t-category-theory new-contributor 112/0 Mathlib.lean,Mathlib/CategoryTheory/Sites/CoveringFamilies.lean 2 21 ['AnthonyBordg', 'adamtopaz', 'dagurtomas', 'github-actions', 'joelriou', 'mathlib4-merge-conflict-bot'] nobody
184-52199
6 months ago
660-18430
660 days ago
1-48443
1 day
15453 tomaz1502
author:tomaz1502
 Track formalization of runtime complexity I finished porting https://github.com/leanprover-community/mathlib3/pull/14494/ to Lean 4 and made several small PRs, as suggested. This meta PR is used to track the progress of the smaller PRs. ## Pending PRs - [Formalization of List.insertionSort](https://github.com/leanprover-community/mathlib4/pull/15449) - [Lemmas about Split](https://github.com/leanprover-community/mathlib4/pull/15450) - [Formalization of List.merge](https://github.com/leanprover-community/mathlib4/pull/15451) - [Formalization of List.mergeSort](https://github.com/leanprover-community/mathlib4/pull/15452) --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict 525/0 Mathlib.lean,Mathlib/Computability/Timed/InsertionSort.lean,Mathlib/Computability/Timed/Merge.lean,Mathlib/Computability/Timed/MergeSort.lean,Mathlib/Computability/Timed/Split.lean 5 5 ['joneugster', 'mathlib4-merge-conflict-bot', 'mergify'] nobody
184-52197
6 months ago
646-44087
646 days ago
11-43846
11 days
16303 grunweg
author:grunweg
 feat(CI): check for badly formatted titles or missing/contradictory labels --- The zulip workflow is entirely cargo-culted from #16296; please review carefully. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict awaiting-author CI 325/0 .github/build.in.yml,Mathlib.lean,Mathlib/Tactic.lean,Mathlib/Tactic/Linter/ValidatePRTitle.lean,MathlibTest/ValidatePRTitle.lean,lakefile.lean,scripts/README.md,scripts/check-title-labels.lean 8 45 ['Command-Master', 'adomani', 'bryangingechen', 'edegeltje', 'github-actions', 'grunweg', 'joneugster', 'leanprover-community-bot-assistant', 'mathlib4-merge-conflict-bot'] bryangingechen
assignee:bryangingechen
184-52195
6 months ago
503-1288
503 days ago
78-4556
78 days
17587 kmill
author:kmill
 feat: Sym2-as-Finset theory --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-data new-contributor 105/3 Mathlib/Combinatorics/SimpleGraph/Basic.lean,Mathlib/Combinatorics/SimpleGraph/Finite.lean,Mathlib/Data/Sym/Sym2.lean,Mathlib/RingTheory/Polynomial/Vieta.lean 4 11 ['FordUniver', 'YaelDillies', 'github-actions', 'kmill', 'mathlib4-merge-conflict-bot'] nobody
184-52045
6 months ago
unknown
0-0
0 seconds
18236 joelriou
author:joelriou
 feat(Algebra/Category/ModuleCat/Presheaf): the endofunctor of presheaves of modules induced by an oplax natural transformation An endomorphism of ` ModuleCat.restrictScalarsPseudofunctor`, i.e. a "compatible" family of functors `ModuleCat A ⥤ ModuleCat A` for all (commutative) rings `A` induces a functor `PresheafOfModules R ⥤ PresheafOfModules R` for any presheaf of (commutative) rings `R`. In #18262, this is applied to the construction of exterior powers of a presheaves of modules. --- - [x] depends on: #18197 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) WIP t-algebra t-category-theory awaiting-CI merge-conflict awaiting-author
label:t-algebra$
 180/0 Mathlib.lean,Mathlib/Algebra/Category/ModuleCat/Presheaf/FunctorOfNatTrans.lean 2 6 ['github-actions', 'kim-em', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
184-52044
6 months ago
unknown
0-0
0 seconds
18630 tomaz1502
author:tomaz1502
 feat(Computability.Timed): Formalization of runtime complexity of List.mergeSort This PR adds the formalization of the runtime complexity of the merge sort algorithm, defined in `Data/List/Sort`. Requires: https://github.com/leanprover-community/mathlib4/pull/15451 References: - Previous PR on mathlib3: https://github.com/leanprover-community/mathlib3/pull/14494/ - First discussion on Zulip: https://leanprover.zulipchat.com/#narrow/stream/113488-general/topic/BSc.20Final.20Project/near/220647062 - Second disussion on Zulip: https://leanprover.zulipchat.com/#narrow/stream/113488-general/topic/Formalization.20of.20Runtime.20Complexity.20of.20Sorting.20Algorithms/near/284184450 --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-computability new-contributor 526/0 Mathlib.lean,Mathlib/Computability/Timed/InsertionSort.lean,Mathlib/Computability/Timed/Merge.lean,Mathlib/Computability/Timed/MergeSort.lean,Mathlib/Computability/Timed/Split.lean 5 9 ['github-actions', 'mathlib4-merge-conflict-bot'] nobody
184-52043
6 months ago
563-17446
563 days ago
0-77273
21 hours
18749 GabinKolly
author:GabinKolly
 feat(ModelTheory): preparatory work for the existence of Fraïsse limits Define the map of a PartialEquiv through an embedding, and related properties. Define embeddings and equivalences between equal structures or equal substructures, and related properties. Add miscellaneous lemmas which will be used to prove the existence of fraisse limits. --- This is preparation for #18876 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict awaiting-author t-logic 308/5 Mathlib/ModelTheory/Bundled.lean,Mathlib/ModelTheory/DirectLimit.lean,Mathlib/ModelTheory/FinitelyGenerated.lean,Mathlib/ModelTheory/PartialEquiv.lean,Mathlib/ModelTheory/Substructures.lean 5 10 ['GabinKolly', 'YaelDillies', 'github-actions', 'mathlib4-merge-conflict-bot', 'vihdzp'] nobody
184-52041
6 months ago
487-14601
487 days ago
73-63475
73 days
18876 GabinKolly
author:GabinKolly
 feat(ModelTheory/Fraisse): add proof that Fraïssé limits exist Fraïssé limits exist. --- All the preparatory work done in other files is contained in the pull request #18749, this pull request adds the work done in ModelTheory/Fraisse, the definition of the sequence of structures whose limit will be the Fraïssé limit, lemmas about this sequence, and then the proof that the limit is indeed a Fraïssé limit. - [ ] depends on: #18749 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict blocked-by-other-PR t-logic 666/5 Mathlib/ModelTheory/Bundled.lean,Mathlib/ModelTheory/DirectLimit.lean,Mathlib/ModelTheory/FinitelyGenerated.lean,Mathlib/ModelTheory/Fraisse.lean,Mathlib/ModelTheory/PartialEquiv.lean,Mathlib/ModelTheory/Substructures.lean 6 3 ['github-actions', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
184-52039
6 months ago
557-23373
557 days ago
0-37
37 seconds
19323 madvorak
author:madvorak
 feat: Function to Sum decomposition --- Discussion: https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/Function.20to.20Sum.20decomposition merge-conflict WIP t-data 50/0 Mathlib.lean,Mathlib/Data/Sum/Decompose.lean 2 3 ['github-actions', 'madvorak', 'mathlib4-merge-conflict-bot'] nobody
184-52038
6 months ago
504-32271
504 days ago
43-18002
43 days
19378 adamtopaz
author:adamtopaz
 feat: Explanation widgets This adds some simple widgets, wrapped in a tactic, term and command elaborator, for displaying markdown explanations in the infoview. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict awaiting-author t-meta 101/0 Mathlib.lean,Mathlib/Tactic.lean,Mathlib/Tactic/Widget/Explain.lean 3 9 ['adamtopaz', 'eric-wieser', 'github-actions', 'joneugster', 'kmill', 'mathlib4-merge-conflict-bot'] nobody
184-52037
6 months ago
496-23008
496 days ago
49-76666
49 days
19456 AntoineChambert-Loir
author:AntoineChambert-Loir
 feat(Data/Finsupp/MonomialOrder/DegRevLex): homogeneous reverse lexicographic order Definition of the homogeneous reverse lexicographic order --- - [x] depends on: #19453 - [x] depends on: #19455 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) WIP t-order t-data merge-conflict t-algebraic-geometry 362/0 Mathlib.lean,Mathlib/Data/Finsupp/MonomialOrder/DegLex.lean,Mathlib/Data/Finsupp/MonomialOrder/DegRevLex.lean 3 3 ['github-actions', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
184-52036
6 months ago
543-43212
543 days ago
0-27
27 seconds
19797 eric-wieser
author:eric-wieser
 refactor: use Qq in the nlinarith preprocessor This also provides the machinery needed to Qq-ify linarith itself. This is still doing far more `synthInstanceQ`/`isDefEq`(`Q`) than should be needed, but at least drops the `mkAppM`s. Currently, this takes a different approach to the one used by `NormNum.Result`: * `NormNum.Result` deliberately avoids adding any `Expr` parameters to types, as this makes defeq problem at compile-time hard * This PR allows the Expr parameters, but adds casting helpers to easily transport along defeq(Q)s. A few `unsafeIntro`s are left, which correspond to either a Qq bug, or a flaw in the idea behind this approach. I don't know if this pattern is an improvement. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-meta large-import 260/28 Mathlib/Data/Ineq.lean,Mathlib/Tactic/Linarith/Datatypes.lean,Mathlib/Tactic/Linarith/Oracle/SimplexAlgorithm.lean,Mathlib/Tactic/Linarith/Preprocessing.lean,Mathlib/Util/Qq.lean 5 9 ['eric-wieser', 'github-actions', 'leanprover-bot', 'mathlib4-merge-conflict-bot'] nobody
184-51909
6 months ago
unknown
0-0
0 seconds
20051 Timeroot
author:Timeroot
 feat: `Clone` and some instances Defines clones (`Clone`). And there is a file, `Instances.lean`, that gives several most important examples of Clones. In particular, it has all of the clones (in an appropriately general form) that occur in [Post's Lattice](https://en.wikipedia.org/wiki/Post%27s_lattice), and [later proving](https://github.com/leanprover-community/mathlib4/pull/24744) the completeness of Post's Lattice is why I'm making this PR. (Edit: Used to also say "Defined operads (`Operad`), symmetric operads (`SymmOperad`), and clones ... There is a proof that all clones have a natural operad structure.". This has been scrapped.) --- - [x] depends on: #20133 [basics and notations] - [x] depends on: #20134 [permutations] - [x] depends on: #20138 [operad] - [x] depends on: #20141 [clone] - [x] depends on: #23459 [defs] - [ ] depends on: #23460 [basic] [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict awaiting-author t-algebra blocked-by-other-PR
label:t-algebra$
 623/0 Mathlib.lean,Mathlib/Algebra/Clone/Basic.lean,Mathlib/Algebra/Clone/Defs.lean,Mathlib/Algebra/Clone/Instances.lean,Mathlib/Data/Fin/Basic.lean 5 33 ['Timeroot', 'YaelDillies', 'eric-wieser', 'github-actions', 'jcommelin', 'kbuzzard', 'kim-em', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot', 'wmacmil'] nobody
184-51908
6 months ago
unknown
0-0
0 seconds
20466 MohanadAhmed
author:MohanadAhmed
 feat: Sherman Morrison formula for rank 1 update of the matrix inverse Provides the Sherman Morrison rank 1 update of the matrix inverse https://en.wikipedia.org/wiki/Sherman%E2%80%93Morrison_formula. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict awaiting-author t-data 37/0 Mathlib/Data/Matrix/Invertible.lean 1 5 ['eric-wieser', 'github-actions', 'mathlib4-merge-conflict-bot'] nobody
184-51906
6 months ago
480-25690
480 days ago
23-30652
23 days
20648 anthonyde
author:anthonyde
 feat: formalize regular expression -> εNFA The file `Computability/RegularExpressionsToEpsilonNFA.lean` contains a formal definition of Thompson's method for constructing an `εNFA` from a `RegularExpression` and a proof of its correctness. --- - [x] depends on: #20644 - [x] depends on: #20645 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-computability awaiting-zulip new-contributor 490/0 Mathlib.lean,Mathlib/Computability/RegularExpressionsToEpsilonNFA.lean,docs/references.bib 3 7 ['anthonyde', 'github-actions', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot', 'meithecatte', 'qawbecrdtey'] nobody
184-51905
6 months ago
381-84834
381 days ago
75-77754
75 days
20649 GabinKolly
author:GabinKolly
 feat(ModelTheory/Graph): prove characterization of the fraisse limit of finite simple graphs Prove that a countable graph with the extension property must be the Fraisse limit of finite simple graphs. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) WIP large-import merge-conflict t-combinatorics t-logic 175/0 Mathlib/ModelTheory/Graph.lean,Mathlib/ModelTheory/Substructures.lean 2 2 ['github-actions', 'mathlib4-merge-conflict-bot'] nobody
184-51903
6 months ago
unknown
0-0
0 seconds
20652 jjaassoonn
author:jjaassoonn
 feat: categorical description of center of a ring We show the isomorphism between `Z(R)` and `End(1 Mod-R)` --- - [x] depends on:#20721 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict awaiting-author t-algebra t-category-theory
label:t-algebra$
 212/21 Mathlib.lean,Mathlib/Algebra/Category/ModuleCat/ChangeOfRings.lean,Mathlib/Algebra/Category/Ring/Center.lean,Mathlib/CategoryTheory/Conj.lean,Mathlib/CategoryTheory/Endomorphism.lean,Mathlib/CategoryTheory/Preadditive/AdditiveFunctor.lean,Mathlib/CategoryTheory/Preadditive/Basic.lean 7 42 ['alreadydone', 'github-actions', 'jcommelin', 'jjaassoonn', 'kbuzzard', 'mathlib4-merge-conflict-bot', 'qawbecrdtey'] nobody
184-51902
6 months ago
472-49332
472 days ago
5-77051
5 days
20924 tomaz1502
author:tomaz1502
 feat(Computability/QueryComplexity): Oracle-based computation This PR adds the types and lemmas for oracle-based computation. In this model, computations are run on a monad which also counts the number of oracle queries executed. With it, it becomes possible to reason about the upper bound of the query complexity of algorithms. In the future, we could extend this work to include the necessary bits from information theory and probability to also reason about lower bounds on query complexity, like the work in https://github.com/girving/debate. Zulip discussion: https://leanprover.zulipchat.com/#narrow/channel/144837-PR-reviews/topic/.2318629.20runtime.20complexity.20of.20sorting.20a.20list Co-authored-by: Geoffrey Irving --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-computability 305/0 Mathlib.lean,Mathlib/Computability/QueryComplexity/Basic.lean,Mathlib/Computability/QueryComplexity/Defs.lean 3 60 ['eric-wieser', 'girving', 'github-actions', 'mathlib4-merge-conflict-bot', 'quangvdao', 'tomaz1502'] nobody
184-51901
6 months ago
453-73196
453 days ago
27-32630
27 days
20956 tomaz1502
author:tomaz1502
 feat(Computability/QueryComplexity/Sort.lean): Formalization of upper bound of queries for merge sort This PR builds on top of #20924 to prove that merge sort (as defined in Lean's library) never executes more than `3 * n * ceil_log2 n` comparisons, where `n` is the size of the input list and `ceil_log2` is the ceil of the logarithm in base 2, which is defined in this PR. Zulip discussion: https://leanprover.zulipchat.com/#narrow/channel/144837-PR-reviews/topic/.2318629.20runtime.20complexity.20of.20sorting.20a.20list - [ ] depends on: #20924 Co-authored-by: Geoffrey Irving --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-computability blocked-by-other-PR 676/0 Mathlib.lean,Mathlib/Computability/QueryComplexity/Basic.lean,Mathlib/Computability/QueryComplexity/Defs.lean,Mathlib/Computability/QueryComplexity/Sort.lean 4 4 ['github-actions', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
184-51899
6 months ago
485-20460
485 days ago
0-41
41 seconds
21270 GabinKolly
author:GabinKolly
 feat(ModelTheory/Bundled): first-order embeddings and equivalences from equalities Add first-order embeddings and equivalences from equalities between bundled structures. --- Add two definitions to get embeddings and equivalences from equalities between bundled structures, and simple properties. This is some preparatory work for #18876 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict awaiting-author large-import t-logic 102/0 Mathlib/ModelTheory/Bundled.lean 1 27 ['GabinKolly', 'Vierkantor', 'YaelDillies', 'github-actions', 'mathlib4-merge-conflict-bot'] nobody
184-51897
6 months ago
403-53710
403 days ago
50-58472
50 days
21277 GabinKolly
author:GabinKolly
 feat(ModelTheory/PartialEquiv): Define the mapping of a self-partialEquiv through an embedding Define the mapping of a self-partialEquiv through an embedding and the notion of fully extendable partialEquiv. --- This is some preparatory work for #18876 - [ ] depends on: #21276 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict blocked-by-other-PR t-logic 215/5 Mathlib/ModelTheory/PartialEquiv.lean,Mathlib/ModelTheory/Substructures.lean 2 3 ['github-actions', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
184-51895
6 months ago
477-1873
477 days ago
0-668
11 minutes
21616 peabrainiac
author:peabrainiac
 feat(Topology): concatenating countably many paths Adds `Path.countableConcat`, the concatenation of a sequence of paths leading up to some point `x`. --- - [x] depends on: #21591 - [x] depends on: #21607 This work is a prerequisite to #20248, where it is used to show that the topology of first-countable locally path-connected spaces is coinduced by all the paths in that space. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict awaiting-author t-topology 229/0 Mathlib.lean,Mathlib/Topology/Path/CountableConcat.lean 2 31 ['YaelDillies', 'github-actions', 'kim-em', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot', 'peabrainiac'] nobody
184-51892
6 months ago
397-51273
397 days ago
56-56728
56 days
21624 sinhp
author:sinhp
 feat(CategoryTheory): The (closed) monoidal structure on the product category of families of (closed) monoidal categories Given a family of closed monoidal categories, we show that the product of these categories is a closed monoidal category with the pointwise monoidal structure. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict awaiting-author t-category-theory 144/0 Mathlib.lean,Mathlib/CategoryTheory/Pi/Basic.lean,Mathlib/CategoryTheory/Pi/Monoidal.lean,Mathlib/CategoryTheory/Pi/MonoidalClosed.lean 4 20 ['TwoFX', 'YaelDillies', 'b-mehta', 'github-actions', 'jcommelin', 'mathlib4-merge-conflict-bot', 'sinhp'] nobody
184-51891
6 months ago
409-66133
409 days ago
50-48893
50 days
21829 Whysoserioushah
author:Whysoserioushah
 feat(LinearAlgebra/TensorProduct/HomTensor): Add TensorProduct of Hom-modules Co-authored-by: Andrew Yang --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict awaiting-author t-algebra
label:t-algebra$
 174/0 Mathlib.lean,Mathlib/LinearAlgebra/TensorProduct/HomTensor.lean 2 27 ['Whysoserioushah', 'YaelDillies', 'erdOne', 'github-actions', 'kbuzzard', 'mathlib4-merge-conflict-bot'] nobody
184-51889
6 months ago
416-46564
416 days ago
46-53039
46 days
21903 yhtq
author:yhtq
 feat: add from/toList between `FreeSemigroup` and `List` with relative theorems Add from/toList between `FreeSemigroup` and `List` with relative theorems, as well as an incidental definition of lexicographic order on `FreeSemigroup`. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra new-contributor awaiting-CI large-import merge-conflict
label:t-algebra$
 169/0 Mathlib/Algebra/Free.lean 1 12 ['YaelDillies', 'github-actions', 'mathlib4-merge-conflict-bot'] nobody
184-51765
6 months ago
411-35720
411 days ago
50-9294
50 days
22159 shetzl
author:shetzl
 feat: add definition of pushdown automata Add the definition of pushdown automata and their two acceptance conditions: acceptance based on empty stack and acceptance based on final state. Co-authored-by: Tobias Leichtfried --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-computability awaiting-author new-contributor 70/0 Mathlib.lean,Mathlib/Computability/PDA.lean 2 35 ['YaelDillies', 'github-actions', 'madvorak', 'mathlib4-merge-conflict-bot', 'shetzl'] nobody
184-51759
6 months ago
431-45772
431 days ago
20-81245
20 days
22194 eric-wieser
author:eric-wieser
 feat: oracle computations (alternative) This explores a simpler version of #20924 --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-computability 698/0 Archive/Examples/SumOracle.lean,Mathlib.lean,Mathlib/Computability/QueryComplexity/Defs.lean,Mathlib/Computability/QueryComplexity/Sort.lean 4 5 ['eric-wieser', 'girving', 'github-actions', 'mathlib4-merge-conflict-bot'] nobody
184-51756
6 months ago
unknown
0-0
0 seconds
22231 pechersky
author:pechersky
 feat(Algebra/Valued): `AdicExpansion` initial defns --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-algebra awaiting-author t-topology
label:t-algebra$
 299/0 Mathlib.lean,Mathlib/Topology/Algebra/Valued/AdicExpansion.lean 2 8 ['Thmoas-Guan', 'github-actions', 'grunweg', 'jcommelin', 'mathlib4-merge-conflict-bot'] jcommelin
assignee:jcommelin
184-51755
6 months ago
263-35036
263 days ago
158-37126
158 days
22232 pechersky
author:pechersky
 feat(Algebra/Valued): `AdicExpansion.apprUpto` --- - [ ] depends on: #22231 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-topology blocked-by-other-PR 399/0 Mathlib.lean,Mathlib/Topology/Algebra/Valued/AdicExpansion.lean 2 3 ['github-actions', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
184-51753
6 months ago
452-68046
452 days ago
0-414
6 minutes
22233 pechersky
author:pechersky
 feat(Algebra/Valued): `AdicExpansion.evalAt` --- - [ ] depends on: #22231 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-topology blocked-by-other-PR 488/0 Mathlib.lean,Mathlib/Topology/Algebra/Valued/AdicExpansion.lean 2 3 ['github-actions', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
184-51752
6 months ago
452-68047
452 days ago
0-412
6 minutes
22302 658060
author:658060
 feat: add `CategoryTheory.Topos.Power` This is a continuation of #21281 with the end goal of defining topoi in Mathlib. It introduces the notion of a power object in a category with a subobject classifier, which is a special case of an internal hom. The definition `HasPowerObjects C` contained in this PR is all that remains before `IsTopos C` can be defined. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict awaiting-author t-category-theory new-contributor 312/0 Mathlib.lean,Mathlib/CategoryTheory/Topos/Power.lean 2 3 ['github-actions', 'joelriou', 'mathlib4-merge-conflict-bot'] b-mehta
assignee:b-mehta
184-51750
6 months ago
450-85752
450 days ago
0-1528
25 minutes
22389 adomani
author:adomani
 feat: the variableVariable linter The motivation comes from [this Zulip discussion](https://leanprover.zulipchat.com/#narrow/stream/287929-mathlib4/topic/style.20proposal.3A.20avoid.20.60variable.20.7BX.7D.20.2E.2E.2E.20variable.20.28X.29.60). Summarising, updating a variable binder for a single declaration can be confusing. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict WIP t-linter large-import 167/0 Mathlib.lean,Mathlib/Tactic.lean,Mathlib/Tactic/Linter.lean,Mathlib/Tactic/Linter/VariableVariable.lean,variableDeclarationVariable_replacements.py 5 2 ['github-actions', 'mathlib4-merge-conflict-bot'] nobody
184-51746
6 months ago
unknown
0-0
0 seconds
22497 adomani
author:adomani
 test: decl diff in lean Testing branch for #22464. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict WIP CI test-ci 161/0 .github/workflows/PR_summary_lean.yml,Mathlib.lean,Mathlib/Test.lean,scripts/README.md,scripts/declarations_diff.lean,scripts/declarations_diff_lean_shell_glue.sh 6 8 ['github-actions', 'mathlib4-merge-conflict-bot', 'mergify'] nobody
184-51744
6 months ago
unknown
0-0
0 seconds
22662 plp127
author:plp127
 feat: Localization.Away.lift (computably) This PR adds `Localization.Away.lift'` and `Localization.Away.lift`, computable alternatives to `Localization.awayLift`. --- - [x] depends on: #24791 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-algebra
label:t-algebra$
 74/0 Mathlib/RingTheory/Localization/Away/Basic.lean 1 18 ['eric-wieser', 'github-actions', 'grunweg', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot', 'plp127', 'vihdzp'] kim-em
assignee:kim-em
184-51743
6 months ago
184-51744
184 days ago
257-28368
257 days
22790 mhk119
author:mhk119
 feat: Extend `taylor_mean_remainder_lagrange` to `x < x_0` The `taylor_mean_remainder_lagrange` theorem has the assumption that $x_0 < x$. In many applications, we need $x < x_0$ and one cannot use the current version to obtain this (see [zulip](https://leanprover.zulipchat.com/#narrow/channel/116395-maths/topic/Taylor's.20theorem)). This PR introduces a set of theorems that push negations through Taylor expansions so that one can extend `taylor_mean_remainder_lagrange` to the case when $x < x_0$. These theorems should also be useful elsewhere since they are quite general. merge-conflict awaiting-author t-analysis new-contributor 111/1 Mathlib/Analysis/Calculus/Deriv/Basic.lean,Mathlib/Analysis/Calculus/IteratedDeriv/Lemmas.lean,Mathlib/Analysis/Calculus/Taylor.lean 3 13 ['Paul-Lez', 'github-actions', 'grunweg', 'mathlib4-merge-conflict-bot', 'mhk119'] nobody
184-51737
6 months ago
412-66854
412 days ago
23-16830
23 days
22861 eric-wieser
author:eric-wieser
 feat: add the trace of a bilinear form Following the steps at [#Is there code for X? > Laplacian @ 💬](https://leanprover.zulipchat.com/#narrow/channel/217875-Is-there-code-for-X.3F/topic/Laplacian/near/450834505). --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) Some questions: * Does this generalize to multilinear maps? * Is there an `RCLike` generalization? * Does this generalize to `BilinMap` instead of just `BilinForm`? Perhaps the approach in [#mathlib4 > Stating Schrodinger's equation @ 💬](https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/Stating.20Schrodinger's.20equation/near/500409890) of using `ContinuousLinearMap.adjoint'` is better. merge-conflict awaiting-author t-algebra
label:t-algebra$
 100/0 Mathlib.lean,Mathlib/LinearAlgebra/BilinearForm/Trace.lean 2 4 ['github-actions', 'jcommelin', 'mathlib4-merge-conflict-bot'] nobody
184-51735
6 months ago
413-29883
413 days ago
23-44995
23 days
22919 plp127
author:plp127
 feat(Data/Fintype/Pi): Make `Fintype` instance for `RelHom`s computable Makes the `Fintype` instance for rel homs computable. See this [Zulip](https://leanprover.zulipchat.com/#narrow/channel/113489-new-members/topic/Classical.20vs.20constructive.20logic.20in.20computation/near/496220816) message. --- - [x] depends on: #24748 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict awaiting-author t-data 178/44 Mathlib/Combinatorics/SimpleGraph/Basic.lean,Mathlib/Combinatorics/SimpleGraph/Coloring.lean,Mathlib/Combinatorics/SimpleGraph/Maps.lean,Mathlib/Data/Fintype/CardEmbedding.lean,Mathlib/Data/Fintype/Pi.lean 5 31 ['IvanRenison', 'b-mehta', 'eric-wieser', 'fpvandoorn', 'github-actions', 'leanprover-community-bot-assistant', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot', 'plp127'] b-mehta
assignee:b-mehta
184-51733
6 months ago
358-65004
358 days ago
71-41637
71 days
22954 eric-wieser
author:eric-wieser
 feat(RingTheory/Congruence/Hom): copy from GroupTheory This was motivated in review of #22355, but I no longer recall why. It also helps with #29357. Either way, this captures a definition that was inlined in a later file. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-ring-theory 214/16 Mathlib/Algebra/RingQuot.lean,Mathlib/GroupTheory/Congruence/Hom.lean,Mathlib/RingTheory/Congruence/Defs.lean,Mathlib/RingTheory/Congruence/Hom.lean,Mathlib/RingTheory/TwoSidedIdeal/Kernel.lean 5 3 ['github-actions', 'leanprover-community-bot-assistant', 'mathlib4-merge-conflict-bot'] nobody
184-51732
6 months ago
433-33446
433 days ago
0-135
2 minutes
23285 AntoineChambert-Loir
author:AntoineChambert-Loir
 refactor: directed systems in terms of functors This is a WIP aiming to refactor the work on directed systems using the category theory library. But there are universes nightmares. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) WIP t-algebra t-category-theory large-import merge-conflict
label:t-algebra$
 111/45 Mathlib/Order/DirectedInverseSystem.lean 1 2 ['github-actions', 'mathlib4-merge-conflict-bot'] nobody
184-51726
6 months ago
423-83854
423 days ago
0-24
24 seconds
23460 Timeroot
author:Timeroot
 feat: Definition of `Clone` Basics about Clones. Part of #20051 --- - [ ] depends on: #26329 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-algebra blocked-by-other-PR
label:t-algebra$
 326/0 Mathlib.lean,Mathlib/Algebra/Clone/Basic.lean,Mathlib/Algebra/Clone/Defs.lean,Mathlib/Data/Fin/Basic.lean 4 3 ['github-actions', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
184-51724
6 months ago
267-14096
267 days ago
65-54502
65 days
23503 apnelson1
author:apnelson1
 feat(Topology/Instances/ENat): ENat and tsum We give API for the interactions between `tsum` and `ENat`. The type is especially nice, because every function is summable, and there are simplifying lemmas like the statement that a sum is infinite iff either some term is infinite, or the support is infinite. This provides one of the missing pieces for working painlessly with discrete objects, 'propositional' finiteness and cardinality. For instance, one can sum a function `f : a -> ENat` over an arbitrary set with the term `∑' a : s, 1`, and it will be provable that `∑' a : s, 1 = s.encard` and `(support f).encard ≤ ∑' a, f a` without ever having to split into finite/infinite cases. As is pointed out in the module docstring for `Data.ENat`, there are strong analogies between `ENat` and `ENNReal`, and the API runs parallel to the API for `tsum`/`ENNReal`. One could call it 'duplication', but I have yet to find a common generalization of the two that saves work, or a third example of a natural type with these same properties. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict WIP t-topology large-import 205/2 Mathlib/Data/ENat/Basic.lean,Mathlib/Data/Set/Card.lean,Mathlib/Topology/Instances/ENat.lean 3 3 ['eric-wieser', 'github-actions', 'mathlib4-merge-conflict-bot'] nobody
184-51722
6 months ago
403-6275
403 days ago
14-6036
14 days
23585 plp127
author:plp127
 feat: `Filter.atMax` and `Filter.atMin` Adds `atMax` and `atMin`, filters. Making an analogy, `atMax` : `atTop` :: `IsMax` : `IsTop`. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict WIP t-order 148/0 Mathlib.lean,Mathlib/Order/Filter/AtMaxMin.lean 2 5 ['github-actions', 'mathlib4-merge-conflict-bot', 'plp127', 'urkud'] nobody
184-51721
6 months ago
unknown
0-0
0 seconds
23758 erdOne
author:erdOne
 feat(Topology/Algebra): linearly topologized iff non-archimedean ...for topological modules over compact rings or `ℤ`-finite rings --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra large-import merge-conflict awaiting-author t-topology
label:t-algebra$
 138/3 Mathlib/LinearAlgebra/Span/Basic.lean,Mathlib/Topology/Algebra/LinearTopology.lean 2 22 ['ADedecker', 'AntoineChambert-Loir', 'erdOne', 'github-actions', 'grunweg', 'mathlib4-merge-conflict-bot'] ADedecker and AntoineChambert-Loir
assignee:AntoineChambert-Loir assignee:ADedecker
184-51719
6 months ago
285-62584
285 days ago
124-78308
124 days
24161 urkud
author:urkud
 feat(Analysis/Calculus/Schwarzian): new file --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-analysis 190/3 Mathlib.lean,Mathlib/Analysis/Calculus/Deriv/ZPow.lean,Mathlib/Analysis/Calculus/Schwarzian/Basic.lean 3 3 ['github-actions', 'leanprover-community-bot-assistant', 'mathlib4-merge-conflict-bot'] nobody
184-51585
6 months ago
unknown
0-0
0 seconds
24333 xcloudyunx
author:xcloudyunx
 feat(Combinatorics/SimpleGraph): cycle graph implementation for generic vertex types The existing `cycleGraph` implementation under Combinatorics/SimpleGraph/Circulant.lean only operates over `Fin n`. This PR implements a cycle graph implementation over any generic vertex type. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict awaiting-author t-combinatorics new-contributor 187/0 Mathlib.lean,Mathlib/Combinatorics/SimpleGraph/Cycle.lean 2 42 ['IvanRenison', 'github-actions', 'mathlib4-merge-conflict-bot', 'vlad902'] kmill
assignee:kmill
184-51584
6 months ago
270-50165
270 days ago
123-18878
123 days
24540 robertmaxton42
author:robertmaxton42
 feat(Quiv): add the empty, vertex, point, interval, and walking quivers Add: * The empty quiver * The vertex quiver (one vertex, and no edges) and the point quiver (one vertex, one self-edge) * The interval quiver (two vertices with an edge between them) * The walking quiver (vertices `0` and `1` with two edges both `0 -> 1`. Functors from the walking quiver to `Type` define quivers, by interpreting `F.obj 0` as the type of vertices, `F.obj 1` as the type of edges, using one of the two edges to label the source of every edge and using the other to label the target.) - [x] depends on: #24538 --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict awaiting-author t-category-theory 370/0 Mathlib.lean,Mathlib/CategoryTheory/Category/Quiv/Shapes.lean,Mathlib/CategoryTheory/Category/Quiv/WalkingQuiver.lean,Mathlib/Logic/Small/Defs.lean 4 14 ['github-actions', 'joelriou', 'leanprover-community-bot-assistant', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot', 'robertmaxton42', 'robin-carlier'] nobody
184-51579
6 months ago
378-83160
378 days ago
0-6849
1 hour
24744 Timeroot
author:Timeroot
 Post's lattice Draft PR for now so I can get CI checks. Eventually want to prove Post's Lattice --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict WIP 758/0 Mathlib.lean,Mathlib/Algebra/Clone/Basic.lean,Mathlib/Algebra/Clone/Defs.lean,Mathlib/Algebra/Clone/Instances.lean,Mathlib/Algebra/Clone/PostLattice.lean,Mathlib/Data/Fin/Basic.lean 6 2 ['github-actions', 'mathlib4-merge-conflict-bot'] nobody
184-51574
6 months ago
unknown
0-0
0 seconds
24850 pechersky
author:pechersky
 feat(Topology/UniformSpace/Ultra): uniform spaces induced by pseudometrics are ultra if system is ultra Any uniform space has a natural system of pseudometrics definable on it, comprised of those pseudometrics constructed from a descending chain of equivalence relation entourages. In a nonarchimedean uniformity, this pseudometric system induces the uniformity. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) - [x] depends on: #23111 merge-conflict t-topology 509/1 Mathlib.lean,Mathlib/Topology/MetricSpace/BundledFun.lean,Mathlib/Topology/UniformSpace/Ultra/Pseudometrizable.lean 3 9 ['ADedecker', 'fpvandoorn', 'github-actions', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot', 'pechersky'] urkud
assignee:urkud
184-51571
6 months ago
184-51572
184 days ago
177-43034
177 days
25324 eric-wieser
author:eric-wieser
 feat: more functorial results about DFinsupp We have these already for Finsupp. The `DFinsupp` statements need some extra casts in some places. --- - [ ] depends on: #27182 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) [#mathlib4 > Equiv.cast for structures @ 💬](https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/Equiv.2Ecast.20for.20structures/near/521390935) merge-conflict awaiting-author t-algebra t-data
label:t-algebra$
 137/16 Mathlib/Data/DFinsupp/Defs.lean,Mathlib/LinearAlgebra/DFinsupp.lean 2 13 ['github-actions', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot', 'pechersky'] pechersky
assignee:pechersky
184-51566
6 months ago
234-71837
234 days ago
19-26510
19 days
25585 Paul-Lez
author:Paul-Lez
 feat(Tactic/Linters/DeprecatedSimpLemma): lint for deprecated simp lemmas The deprecated simp lemma linter flags declarations that have both the `deprecated` and `simp` attributes. See Zulip discussion: [#mathlib4 > Help with Mathlib.Order.Interval.Finset.Defs @ 💬](https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/Help.20with.20Mathlib.2EOrder.2EInterval.2EFinset.2EDefs/near/505994843) --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-linter awaiting-author 105/0 Mathlib.lean,Mathlib/Tactic.lean,Mathlib/Tactic/Linter/DeprecatedSimpLemma.lean,MathlibTest/DeprecatedSimpLemmaTest.lean 4 8 ['adomani', 'github-actions', 'grunweg', 'mathlib4-merge-conflict-bot'] nobody
184-51439
6 months ago
348-37134
348 days ago
0-87
1 minute
25683 eric-wieser
author:eric-wieser
 feat: Enumeration of NonemptyInterval --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-data large-import 52/4 Mathlib/Data/Sym/Sym2/Fin.lean,Mathlib/Data/Sym/Sym2/Order.lean 2 2 ['github-actions', 'mathlib4-merge-conflict-bot'] nobody
184-51436
6 months ago
unknown
0-0
0 seconds
25739 literandltx
author:literandltx
 feat(NumberTheory/LegendreSymbol): Add sqrt‐of‐residue theorems for p=4k+3 and p=8k+5 Add a new file `QuadraticResidueRoots.lean` under `Mathlib/NumberTheory/LegendreSymbol/` that proves two explicit “square-root of quadratic residue” theorems for primes of the specific form. - **`exists_sqrt_of_residue_mod4_eq3`** for primes `p = 4*k + 3` - **`exists_sqrt_of_residue_mod8_eq5`** for primes `p = 8*k + 5` It also introduces the helper lemmas `euler_criterion_traditional` and `legendreSym.at_two_mod8_eq_5`. Import lines in `Mathlib.lean` and `Mathlib/NumberTheory/LegendreSymbol/Basic.lean` have been updated accordingly. merge-conflict awaiting-author t-number-theory new-contributor 217/0 Mathlib.lean,Mathlib/NumberTheory/LegendreSymbol/Basic.lean,Mathlib/NumberTheory/LegendreSymbol/QuadraticReciprocity.lean,Mathlib/NumberTheory/LegendreSymbol/QuadraticResidueRoots.lean 4 3 ['github-actions', 'kckennylau', 'mathlib4-merge-conflict-bot'] literandltx
assignee:literandltx
184-51435
6 months ago
326-74998
326 days ago
17-63153
17 days
25746 robin-carlier
author:robin-carlier
 feat(Tactic/CategoryTheory): `Cancelable` boilerplate for the `rotate_isos` WIP tactic This PR adds some boilerplate that will be used in a forthcoming PR implementing a `rotate_isos` tactic that aims to provide easy ways of moving one or more morphisms that can be inferred to be isomorphisms (not necessarily through the `IsIso typeclass, but also directly by recognizing them as e.g components of natural isomorphisms, or functor application to such morphisms). The boilerplate in this PR abstracts the notion of a cancelable expression for a morphism in a composition of (iso)morphisms in a category, and records a global reference to a list of "cancelable factories", _i.e_ functions that try to recognize term in an expression as a "cancelable" morphism, and provides helper to register such functions. --- First part of a series of 3 PRs contributing the `rotate_isos` tactic to mathlib. Second part will actually implement the tactic, and provide a test suite. Please read the description of the second PR (#24454) to get more details. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) --- *This PR continues the work from #24452.* *Original PR: https://github.com/leanprover-community/mathlib4/pull/24452* merge-conflict awaiting-author t-category-theory t-meta 162/0 Mathlib.lean,Mathlib/Tactic.lean,Mathlib/Tactic/CategoryTheory/RotateIsos/Cancelable.lean,scripts/noshake.json 4 2 ['github-actions', 'mathlib4-merge-conflict-bot'] nobody
184-51433
6 months ago
344-50686
344 days ago
0-2
2 seconds
25747 robin-carlier
author:robin-carlier
 feat(Tactic/CategoryTheory): the `rotate_isos` tactic We define a `rotate_isos` tactic for category theory in mathlib. At its core, the tactic transform terms of type `α(1) ≫ ⋯ ≫ α(k) = β(1) ≫ ⋯ ≫ β(l)` where `α` and `β` are families of morphisms in whith the first `i` morphisms of the left-hand side and the last `j` morphisms of the right-hand side are isomorhisms, into terms of type `α(k-i) ≫ ⋯ ≫ α(k) ≫ inv β(l) ≫ ⋯ ≫ β(l-j+1) = inv α(j) ≫ ⋯ ≫ inv α(1) ≫⋯ ≫ β(l-j)`. The construction of the inverses of expression are caried at the `Expr` levels are built out of the expressions of the morphisms, for instance, for this tactic, the inverse of `F.map (G.map (H.map f.hom)))` will directly be `F.map (G.map (H.map f.inv)))` (which would have to be re-simplified), rather than an `inv` term form an `IsIso` instance. The tactic can be applied at a local hypothesis or at the main goal, or can be used through a `rotate_isos%` term elaborator if e.g one wants to add such a "rotated" form to a `simp` or `rw` call. We also support removing morphisms "from the right" of the lhs, rather than from the right. --- The motivations behind this tactic are the following : - This tactic can "autogenerate" lemmas and terms generalizing lemmas such as [CategoryTheory.Iso.hom_inv_id_app_app_app](https://leanprover-community.github.io/mathlib4_docs/Mathlib/CategoryTheory/NatIso.html#CategoryTheory.Iso.hom_inv_id_app_app_app). This can also generate lemmas `F.map (G.map f.hom) ≫F.map (G.map f.inv) = 𝟙 _`, and can be used to unlock a `simp` call that blocks at an expression of the form `F.map (G.map f.hom) ≫F.map (G.map f.inv) `. - Currently, cancelling morphisms "from the right" in an expression in category theory is a bit of a pain. You have to first reassociate the expression, perform multiple calls to `Iso.inv_comp_eq`, reassociate, etc. This at least automates this process in a fairly straightforward way. - There are expressions in category theory that have no "right forms", e.g the pentagon axiom for monoidal categories, which has many variations in the way one can read the diagram of isomorphisms that represents it. Elaborators such as `rotate_iso%` easily generates all possible forms of such identities from one single form, and avoids having to state multiple forms of the same equality as individual lemmas. - I have been playing with medium-sized diagrams of isomorphisms recently (think for example vertical/horizontal compositions of `CatCommSq`, whiskering a corner of such diagrams, etc.), and it made me wish a lot of time that such easy way to transforms equalities to equivalent forms were available. - [ ] depends on: #25746 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) --- *This PR continues the work from #24454.* *Original PR: https://github.com/leanprover-community/mathlib4/pull/24454* WIP blocked-by-other-PR t-category-theory merge-conflict awaiting-author t-meta 871/0 Mathlib.lean,Mathlib/Tactic.lean,Mathlib/Tactic/CategoryTheory/RotateIsos/Cancelable.lean,Mathlib/Tactic/CategoryTheory/RotateIsos/Core.lean,Mathlib/Tactic/CategoryTheory/RotateIsos/Lemmas.lean,MathlibTest/CategoryTheory/RotateIsos.lean,scripts/noshake.json 7 3 ['github-actions', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
184-51432
6 months ago
344-50325
344 days ago
0-2
2 seconds
25748 robin-carlier
author:robin-carlier
 feat(Tactic/CategoryTheory): Initial lemmas for the `rotate_iso` tactic This PR records an initial set of lemmas to be used by the WIP `rotate_isos` tactic. --- - [ ] depends on: #25746 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) --- *This PR continues the work from #24506.* *Original PR: https://github.com/leanprover-community/mathlib4/pull/24506* merge-conflict blocked-by-other-PR t-meta 496/0 Mathlib.lean,Mathlib/Tactic.lean,Mathlib/Tactic/CategoryTheory/RotateIsos/Cancelable.lean,Mathlib/Tactic/CategoryTheory/RotateIsos/Lemmas.lean,scripts/noshake.json 5 3 ['github-actions', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
184-51430
6 months ago
344-49417
344 days ago
0-599
9 minutes
25750 robin-carlier
author:robin-carlier
 feat(Tactic/CategoryTheory): bicategory extension for `rotate_isos` This PR registers some lemmas to the `rotate_isos` tactic so that it applies in bicategorical contexts. For instance, if `α : g ⟶ h` is an invertible 2-cells, the term `f ◁ α ` is also recognized as invertible, with inverse `f ◁ α' `, where `α'` is the expression for the inverse constructed by the tactic. Without this extension, the tactic would only construct the generic `inv (f ◁ α)` as inverse for this term. --- - [ ] depends on: #25747 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) --- *This PR continues the work from #24633.* *Original PR: https://github.com/leanprover-community/mathlib4/pull/24633* merge-conflict blocked-by-other-PR t-category-theory t-meta 1206/0 Mathlib.lean,Mathlib/Tactic.lean,Mathlib/Tactic/CategoryTheory/RotateIsos/Bicategory.lean,Mathlib/Tactic/CategoryTheory/RotateIsos/Cancelable.lean,Mathlib/Tactic/CategoryTheory/RotateIsos/Core.lean,Mathlib/Tactic/CategoryTheory/RotateIsos/Lemmas.lean,MathlibTest/CategoryTheory/RotateIsos.lean,scripts/noshake.json 8 3 ['github-actions', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
184-51428
6 months ago
344-49522
344 days ago
0-1
1 second
25751 robin-carlier
author:robin-carlier
 feat(Tactic/CategoryTheory): monoidal extension of `rotate_isos` This PR registers some lemmas to the `rotate_isos` tactic so that it applies in monoidal contexts. For instance, if α : y ⟶ z is an invertible morphism, the term x ◁ α is also recognized as invertible, with inverse x ◁ α' , where α' is the expression for the inverse constructed by the tactic. Without this extension, the tactic would only construct the generic inv (x ◁ α) as inverse for this term. We also take care of terms of the form `f ⊗ g` --- - [ ] depends on: #25747 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) --- *This PR continues the work from #24634.* *Original PR: https://github.com/leanprover-community/mathlib4/pull/24634* merge-conflict blocked-by-other-PR t-category-theory t-meta 1362/0 Mathlib.lean,Mathlib/Tactic.lean,Mathlib/Tactic/CategoryTheory/RotateIsos/Cancelable.lean,Mathlib/Tactic/CategoryTheory/RotateIsos/Core.lean,Mathlib/Tactic/CategoryTheory/RotateIsos/Lemmas.lean,Mathlib/Tactic/CategoryTheory/RotateIsos/Monoidal.lean,MathlibTest/CategoryTheory/RotateIsos.lean,scripts/noshake.json 8 3 ['github-actions', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
184-51427
6 months ago
344-49168
344 days ago
0-2
2 seconds
25752 robin-carlier
author:robin-carlier
 feat(Tactic/CategoryTheory): whiskering lemmas for `rotate_isos` This PR extends the base set of terms recognized by the `rotate_isos` tactic to include terms of the form `whiskerLeft F f`, `isoWhiskerLeft F e`, and `NatTrans.hcomp`/ `NatIso.hcomp`. --- - [ ] depends on: #25747 Technically, it could depend solely on #24506, but there’s not much point getting this merged if the base tactic is not there. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) --- *This PR continues the work from #24650.* *Original PR: https://github.com/leanprover-community/mathlib4/pull/24650* merge-conflict blocked-by-other-PR t-meta 1365/0 Mathlib.lean,Mathlib/Tactic.lean,Mathlib/Tactic/CategoryTheory/RotateIsos/Cancelable.lean,Mathlib/Tactic/CategoryTheory/RotateIsos/Core.lean,Mathlib/Tactic/CategoryTheory/RotateIsos/Lemmas.lean,MathlibTest/CategoryTheory/RotateIsos.lean,scripts/noshake.json 7 3 ['github-actions', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
184-51425
6 months ago
344-48979
344 days ago
0-50
50 seconds
25838 Bergschaf
author:Bergschaf
 feat(Order/Atoms): Finsets are Atomistic --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-order large-import 31/0 Mathlib/Order/Atoms.lean 1 2 ['github-actions', 'mathlib4-merge-conflict-bot'] nobody
184-51414
6 months ago
343-38876
343 days ago
0-5594
1 hour
25987 Multramate
author:Multramate
 refactor(AlgebraicGeometry/EllipticCurve/Affine/*): some minor changes This PR continues the work from #24571. Original PR: https://github.com/leanprover-community/mathlib4/pull/24571 merge-conflict t-algebraic-geometry 0/12 Mathlib.lean,Mathlib/AlgebraicGeometry/EllipticCurve/Group.lean 2 4 ['Multramate', 'github-actions', 'grunweg', 'mathlib4-merge-conflict-bot'] nobody
184-51402
6 months ago
339-85084
339 days ago
0-588
9 minutes
25990 Multramate
author:Multramate
 chore(NumberTheory/EllipticDivisibilitySequence): rename definitions This PR continues the work from #25132. Original PR: https://github.com/leanprover-community/mathlib4/pull/25132 merge-conflict t-number-theory 265/45 Mathlib/NumberTheory/EllipticDivisibilitySequence.lean 1 3 ['Multramate', 'github-actions', 'mathlib4-merge-conflict-bot'] nobody
184-51399
6 months ago
339-85072
339 days ago
0-449
7 minutes
26165 oliver-butterley
author:oliver-butterley
 feat(MeasureTheory.VectorMeasure): add lemma which shows that variation of a `ℝ≥0∞` VectorMeasure is equal to itself Add a lemma for the variation of a VectorMeasure which tells that if `μ` is `VectorMeasure X ℝ≥0∞` then ``μ.ennrealVariation = μ`. Co-authored-by: @yoh-tanimoto --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-measure-probability awaiting-author merge-conflict blocked-by-other-PR new-contributor 467/0 Mathlib/MeasureTheory/VectorMeasure/Variation/Basic.lean,Mathlib/Order/Partition/Finpartition.lean 3 9 ['github-actions', 'leanprover-radar', 'mathlib4-merge-conflict-bot', 'oliver-butterley', 'yoh-tanimoto'] nobody
184-51246
6 months ago
321-46201
321 days ago
15-66224
15 days
26298 adomani
author:adomani
 test: the commandStart linter only acts on modified files. Test for #26299: should flag issues in the new file and also in the modified file `Mathlib/Data/Array/Extract.lean`. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict WIP awaiting-author t-linter 63/1 Mathlib.lean,Mathlib/Data/Array/Extract.lean,Mathlib/New.lean,Mathlib/Tactic/Linter/CommandStart.lean 4 21 ['adomani', 'bryangingechen', 'github-actions', 'mathlib4-merge-conflict-bot'] nobody
184-51224
6 months ago
333-37454
333 days ago
0-168
2 minutes
26300 igorkhavkine
author:igorkhavkine
 feat(Analysis/Calculus/FDeriv): continuous differentiability from continuous partial derivatives on an open domain in a product space If a function `f : E × F → G` is continuously differentiable, then its partial derivatives along `E` and `F` are also continuous. The non-trivial converse implication holds when the partial derivatives are continuous on an open domain, and they can be added together to give the total derivative of `f`. See this [#mathlib4 > Partial derivatives @ 💬](https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/Partial.20derivatives/near/520995477) and the containing thread for some discussion. The PR creates a new import (`Mathlib.Analysis.Calculus.FDeriv.Partial`), where other results about partial derivatives could go in the future. --- *this is the migration of #25304 to the PR-from-fork workflow* - [x] depends on: #25564 - [x] depends on: #26273 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) WIP new-contributor awaiting-author t-analysis merge-conflict 468/0 Mathlib/Analysis/Calculus/FDeriv/Partial.lean 3 23 ['YaelDillies', 'agjftucker', 'github-actions', 'igorkhavkine', 'mathlib-merge-conflicts', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot', 'sgouezel'] sgouezel
assignee:sgouezel
184-51223
6 months ago
281-13213
281 days ago
44-77029
44 days
26329 Timeroot
author:Timeroot
 feat: Definition of `Clone` notations and typeclasses Definitions and notation typeclasses for #20051 --- This PR continues the work from #23459. Original PR: https://github.com/leanprover-community/mathlib4/pull/23459 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict awaiting-author t-algebra awaiting-CI
label:t-algebra$
 100/0 Mathlib.lean,Mathlib/Algebra/Clone/Defs.lean 2 4 ['Timeroot', 'YaelDillies', 'github-actions', 'mathlib4-merge-conflict-bot'] nobody
184-51219
6 months ago
332-48128
332 days ago
0-21917
6 hours
26398 ChrisHughes24
author:ChrisHughes24
 feat(ModelTheory): definable functions --- Possibly this should be generalized to partial functions. I migrated the PR by hand instead of using the script. - [x] depends on: #20166 - [x] depends on: #20161 - [x] depends on: #20115 - [x] depends on: #20174 - [x] depends on: #20175 - [x] depends on: #21948 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) please-adopt merge-conflict t-logic 618/0 Mathlib.lean,Mathlib/ModelTheory/FunctionalFormula.lean 2 13 ['ChrisHughes24', 'github-actions', 'jcommelin', 'kckennylau', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot', 'staroperator'] nobody
184-51206
6 months ago
206-40671
206 days ago
87-76183
87 days
26399 ChrisHughes24
author:ChrisHughes24
 refactor(ModelTheory): tidy up proof of Ax-Grothendieck with definable functions I migrated this PR by hand instead of using the script. --- - [x] depends on: #20166 - [x] depends on: #20161 - [x] depends on: #20115 - [x] depends on: #20174 - [x] depends on: #20175 - [x] depends on: #20180 - [x] depends on: #21948 - [ ] depends on: #26398 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict blocked-by-other-PR t-logic 639/60 Mathlib.lean,Mathlib/FieldTheory/AxGrothendieck.lean,Mathlib/ModelTheory/FunctionalFormula.lean 3 4 ['github-actions', 'leanprover-community-bot-assistant', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
184-51205
6 months ago
331-45408
331 days ago
0-958
15 minutes
26432 AntoineChambert-Loir
author:AntoineChambert-Loir
 feat(Data.Nat.LogFueled): fueled version of `clog` This PR continues the work from #25557. Original PR: https://github.com/leanprover-community/mathlib4/pull/25557 merge-conflict t-data 201/0 Mathlib.lean,Mathlib/Data/Nat/LogFueled.lean 2 3 ['AntoineChambert-Loir', 'github-actions', 'mathlib4-merge-conflict-bot'] nobody
184-51204
6 months ago
184-51205
184 days ago
145-77007
145 days
26594 metakunt
author:metakunt
 feat(Algebra/Polynomial/ZMod): Add Polynomial.equiv_of_nat_of_polynomial_zmod This adds an explicit bijection between the naturals and $$\mathbb{Z}/n\mathbb{Z}[X]$$ in a canonical way. --- I feel that some API is missing to make the theorem shorter, I have no idea what lemmas to extract though. Also I don't know when to use spaces and when not, so I did it best effort. merge-conflict awaiting-author t-algebra new-contributor
label:t-algebra$
 465/0 Mathlib.lean,Mathlib/Algebra/Polynomial/ZMod.lean 2 3 ['Ruben-VandeVelde', 'github-actions', 'mathlib4-merge-conflict-bot'] nobody
184-51075
6 months ago
300-8433
300 days ago
25-5233
25 days
26644 kckennylau
author:kckennylau
 feat(SetTheory/ZFC): Define the language of sets and state the ZFC axioms --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict awaiting-author t-set-theory 381/0 Mathlib.lean,Mathlib/SetTheory/ZFC/Axioms.lean,docs/references.bib 3 50 ['b-mehta', 'digama0', 'github-actions', 'kckennylau', 'leanprover-community-bot-assistant', 'mathlib4-merge-conflict-bot', 'staroperator', 'vihdzp'] b-mehta
assignee:b-mehta
184-51073
6 months ago
271-15936
271 days ago
40-52145
40 days
26648 eric-wieser
author:eric-wieser
 chore(TensorProduct): remove more `suppress_compilation`s --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict blocked-by-core-PR t-algebra
label:t-algebra$
 3/7 Mathlib/LinearAlgebra/CliffordAlgebra/Prod.lean,Mathlib/LinearAlgebra/TensorProduct/Graded/External.lean,Mathlib/LinearAlgebra/TensorProduct/Graded/Internal.lean 3 5 ['eric-wieser', 'github-actions', 'leanprover-bot', 'mathlib4-merge-conflict-bot'] nobody
184-51072
6 months ago
320-53107
320 days ago
3-19989
3 days
26757 fweth
author:fweth
 feat(CategoryTheory/Topos): define elementary topos This commit begins the formalization of the notion of an *elementary topos*, following the definition in \[Mac Lane & Moerdijk, *Sheaves in Geometry and Logic* (1992), Ch. IV, Section 1]. It introduces the file `Mathlib/CategoryTheory/Topos/Basic.lean`, which currently includes: * The definition of an elementary topos. * Proof that the power object map is a functor * Theorem about pullbacks of characterstic maps Subobject classifiers, which are used in the definition, have already been defined in `CategoryTheory/Topos/Classifier.lean` Work in progress: further formalization of the section is planned. Questions: * Should the definition of power objects be separated into its own file/module, perhaps under `CategoryTheory/Topos/PowerObject.lean`? * Is the notation `P` / `P_morph` / `P_functor` for the power object functor on objects / morphisms / total acceptable? * Should the comments and docstrings rather use the notation from the book, where `g ∘ f` denotes arrow composition from righ to left, or the Lean variant `f ≫ g`? Klaus Gy klausgy@gmail.com --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict awaiting-author t-category-theory new-contributor 401/66 Mathlib.lean,Mathlib/CategoryTheory/Closed/PowerObjects.lean,Mathlib/CategoryTheory/Limits/Shapes/BinaryProducts.lean,Mathlib/CategoryTheory/Limits/Shapes/Equalizers.lean,Mathlib/CategoryTheory/Limits/Shapes/Pullback/CommSq.lean,Mathlib/CategoryTheory/Limits/Shapes/Pullback/Equalizer.lean,Mathlib/CategoryTheory/Monoidal/Cartesian/Basic.lean,Mathlib/CategoryTheory/Subobject/Basic.lean,Mathlib/CategoryTheory/Topos/Classifier.lean 9 17 ['fweth', 'github-actions', 'joelriou', 'leanprover-community-bot-assistant', 'mathlib4-merge-conflict-bot'] joelriou
assignee:joelriou
184-51070
6 months ago
214-17689
214 days ago
62-6838
62 days
26914 quangvdao
author:quangvdao
 feat(Data/PFunctor/Univariate): more definitions for univariate `PFunctor` This PR defines several basic definitions of `PFunctor`, including zero, one, constants, monomials, coproduct (sum), product, sigma, pi, tensor product, universe lifting, and equivalence. We also add: (1) simple lemmas connecting the basic definitions, (2) an automatically derived ext lemma for `PFunctor` via `@[ext]` attribute Some things I'm not clear on: - I define `HAdd` and `HMul` instances for coproduct and product of poly functors having different universe levels. Should I also define `Add` and `Mul` instances for poly functors having the same universe level? - Is it ok to define notation for tensor product, i.e. `@[inherit_doc] scoped infixr:80 " ⊗ " => tensor`? I'm worried it might clash with other notation. - Need a double-check on the priority of notation. Some future definitions to add: - Various equivalences arising from arithmetic identities, e.g., `P + 0 ≃ₚ P`. - Definitions of Lenses and Charts (each of them will be a file or even a folder) - Exponential objects (corresponding to both `prod` and `tensor`) --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-data 144/5 Mathlib/Data/PFunctor/Univariate/Basic.lean 1 20 ['alexkeizer', 'eric-wieser', 'github-actions', 'mathlib4-merge-conflict-bot', 'quangvdao'] eric-wieser
assignee:eric-wieser
184-51049
6 months ago
184-51050
184 days ago
133-23955
133 days
26920 yuma-mizuno
author:yuma-mizuno
 feat(Tactic.CategoryTheory): add associator inserting tactic --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict WIP t-category-theory t-meta 714/0 Mathlib.lean,Mathlib/Tactic.lean,Mathlib/Tactic/CategoryTheory/Associators.lean,MathlibTest/CategoryTheory/Associators.lean 4 2 ['github-actions', 'mathlib4-merge-conflict-bot'] nobody
184-51048
6 months ago
317-53422
317 days ago
0-16
16 seconds
26990 joelriou
author:joelriou
 feat(CategoryTheory/Abelian): Noetherian objects form a Serre class This PR continues the work from #22367. Original PR: https://github.com/leanprover-community/mathlib4/pull/22367 merge-conflict WIP t-category-theory 311/14 Mathlib.lean,Mathlib/CategoryTheory/Abelian/SerreClass/NoetherianObject.lean,Mathlib/CategoryTheory/Abelian/Subobject.lean,Mathlib/CategoryTheory/Subobject/Basic.lean,Mathlib/CategoryTheory/Subobject/MonoOver.lean 5 2 ['github-actions', 'mathlib4-merge-conflict-bot'] nobody
184-51038
6 months ago
315-39600
315 days ago
0-45
45 seconds
27098 Paul-Lez
author:Paul-Lez
 feat(Algebra/Category/ModuleCat/Sheaf/VectorBundle): define vector bundles This PR defines vector bundles (upstreamed from [formal-conjectures](https://github.com/google-deepmind/formal-conjectures/pull/28/files)). I plan on adding some more API about the definition in this PR, but figured it would be nice to get some initial feedback about the definition before doing so! --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict awaiting-author t-algebra
label:t-algebra$
 53/0 Mathlib.lean,Mathlib/Algebra/Category/ModuleCat/Sheaf/VectorBundle.lean 2 5 ['Kiolt', 'Raph-DG', 'chrisflav', 'github-actions', 'mathlib4-merge-conflict-bot'] chrisflav
assignee:chrisflav
184-51035
6 months ago
296-7305
296 days ago
16-82477
16 days
27155 Pjotr5
author:Pjotr5
 feat: Shearer's bound on the independence number of triangle free graphs I added the file IndependenceNumber.lean to the Mathlib.Combinatorics.SimpleGraph.Triangle folder. It contains a proof of a theorem by Shearer on the independence number of triangle-free graphs . I was told this might be useful to add to Mathlib a Zullip thread linked [here](https://leanprover.zulipchat.com/#narrow/channel/217875-Is-there-code-for-X.3F/topic/Convexity.20of.20a.20specific.20function/with/510469526). I tried to comply as much as I could with the Mathlib style guide, but I realise that there is probably still a significant amount of editing to be done. For one thing: there are probably some lemmas and theorems in there that might be better suited in other files, but since this is my first PR I though I would all put it in one file before starting to edit a bunch of files. I was also advised to split up the file into multiple smaller PRs, but since everything is basically serving this one proof I could not really find a natural way to do that. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict awaiting-author t-combinatorics new-contributor 1266/0 Mathlib.lean,Mathlib/Combinatorics/SimpleGraph/Triangle/IndependenceNumber.lean 2 10 ['Pjotr5', 'github-actions', 'grunweg', 'mathlib4-merge-conflict-bot'] nobody
184-51033
6 months ago
272-21342
272 days ago
39-17587
39 days
27163 pechersky
author:pechersky
 feat(Topology/ValuativeRel): of and to basis of compatible valuations --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) - [x] depends on: #30262 t-number-theory t-algebra merge-conflict awaiting-author t-topology
label:t-algebra$
 229/62 Mathlib/NumberTheory/LocalField/Basic.lean,Mathlib/Order/Filter/Bases/Basic.lean,Mathlib/Topology/Algebra/Valued/ValuativeRel.lean 3 73 ['erdOne', 'github-actions', 'kckennylau', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot', 'pechersky', 'smmercuri'] alreadydone
assignee:alreadydone
184-51032
6 months ago
185-82823
185 days ago
84-31691
84 days
27215 kckennylau
author:kckennylau
 feat(AlgebraicGeometry): Define the Zariski site on `CommRingCatᵒᵖ` We define the Zariski site on `CommRingCatᵒᵖ` by inducing the topology from `Scheme`, and then we show that this topology is equal to the one generated by the pretopology of finite, surjective, and standard open morphisms. --- - [x] depends on: #28614 - [x] depends on: #28615 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict awaiting-author t-algebraic-geometry 312/0 Mathlib.lean,Mathlib/AlgebraicGeometry/OpenImmersion.lean,Mathlib/AlgebraicGeometry/Sites/BigAffineZariski.lean 3 33 ['chrisflav', 'github-actions', 'joelriou', 'kckennylau', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] chrisflav
assignee:chrisflav
184-51030
6 months ago
241-43594
241 days ago
3-70573
3 days
27309 kckennylau
author:kckennylau
 feat(CategoryTheory): a presheaf on `CostructuredArrow F d` can be extended to a presheaf on `C` --- Depends on: * [ ] #27321 Zulip: [#Is there code for X? > over category via a functor](https://leanprover.zulipchat.com/#narrow/channel/217875-Is-there-code-for-X.3F/topic/over.20category.20via.20a.20functor/with/529574191) [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict WIP t-category-theory 218/0 Mathlib.lean,Mathlib/CategoryTheory/Comma/Presheaf/LeftExtension.lean 2 4 ['erdOne', 'github-actions', 'mathlib4-merge-conflict-bot', 'robin-carlier'] erdOne
assignee:erdOne
184-50899
6 months ago
290-41098
290 days ago
15-69033
15 days
27321 kckennylau
author:kckennylau
 feat(CategoryTheory): Colimit can be computed fiberwise We consider category `J` equipped with a functor `F : J ⥤ D` to a discrete category `D`. Then the colimit of any diagram `diagram : J ⥤ C` can be computed using the following algorithm: 1. For each `d : D`, compute the colimit of the restricted diagram `F.fiberIncl d ⋙ diagram`. 2. Take the coproduct of these colimits over all `d : D`. We call this "computing the colimit fiberwise". --- Zulip: [#Is there code for X? > over category via a functor](https://leanprover.zulipchat.com/#narrow/channel/217875-Is-there-code-for-X.3F/topic/over.20category.20via.20a.20functor/with/529574191) [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-category-theory awaiting-CI 136/0 Mathlib.lean,Mathlib/CategoryTheory/FiberedCategory/Fiber.lean,Mathlib/CategoryTheory/Limits/Shapes/Fiberwise.lean 3 25 ['github-actions', 'kckennylau', 'mathlib4-merge-conflict-bot', 'robin-carlier'] nobody
184-50897
6 months ago
268-53321
268 days ago
19-5489
19 days
27417 PierreQuinton
author:PierreQuinton
 feat: add `SigmaCompleteLattice` A $\sigma$-complete lattice is a lattice in which every countable subset `s` has a least upper bound and a greatest lower bound, denoted below by `sSup s` and `sInf s`. This PR adds the classes `SigmaCompleteLattice` as well as some theorems (mainly adapted from `CompleteLattice` and `ConditionallyCompleteLattice`). This is an adaptation of #26318 --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict awaiting-author t-order 394/0 Mathlib.lean,Mathlib/Order/SigmaCompleteLattice.lean 2 9 ['PierreQuinton', 'YaelDillies', 'github-actions', 'mathlib4-merge-conflict-bot', 'vihdzp'] nobody
184-50894
6 months ago
290-19354
290 days ago
12-24971
12 days
27753 YunkaiZhang233
author:YunkaiZhang233
 feat(CategoryTheory): implemented proofs for factorisation categories being equivalent to iterated comma categories in two ways --- Completed one of the tasks in TODOs, shown and implemented the details for (X/C)/f ≌ Factorisation f ≌ f/(C/Y). This is migrated from my previous PR #22390 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict awaiting-author t-category-theory new-contributor 70/1 Mathlib/CategoryTheory/Category/Factorisation.lean 1 13 ['YunkaiZhang233', 'b-mehta', 'github-actions', 'mathlib4-merge-conflict-bot', 'robin-carlier'] nobody
184-50878
6 months ago
295-22041
295 days ago
0-3448
57 minutes
27824 ChrisHughes24
author:ChrisHughes24
 feat(Calculus): exists_gt_of_deriv_pos and variants --- I created a new file for this as I anticipate there will be many lemmas relating derivatives and monotonicity in future. Some lemmas relating deriviatives to monotonicity are already in mathlib and should maybe moved to the file (e.g. docs#HasDerivWithinAt.nonneg_of_monotoneOn). I stated them in as much generality as I could, copying the generality of `HasDerivWithinAt.nonneg_of_monotoneOn`. - [x] depends on: #28039 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict awaiting-author t-analysis 103/0 Mathlib.lean,Mathlib/Analysis/Calculus/Deriv/Order.lean 2 37 ['ChrisHughes24', 'EtienneC30', 'b-mehta', 'github-actions', 'j-loreaux', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot', 'urkud'] hrmacbeth
assignee:hrmacbeth
184-50877
6 months ago
199-11806
199 days ago
81-53032
81 days
27850 fyqing
author:fyqing
 feat: 0-dimensional manifolds are discrete and countable This is the converse direction of the classification of 0-dimensional manifolds. The other direction was shown in #22105. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict awaiting-author t-differential-geometry new-contributor 80/0 Mathlib.lean,Mathlib/Geometry/Manifold/ZeroDim.lean 2 14 ['fyqing', 'github-actions', 'grunweg', 'mathlib4-merge-conflict-bot', 'tb65536'] grunweg
assignee:grunweg
184-50876
6 months ago
293-83103
293 days ago
0-5718
1 hour
27973 smmercuri
author:smmercuri
 feat: the ring of integers of a `ℤₘ₀`-valued field is compact whenever it is a DVR and the residue field is finite This PR continues the work from #21844. Original PR: https://github.com/leanprover-community/mathlib4/pull/21844 merge-conflict awaiting-author t-algebra large-import
label:t-algebra$
 54/2 Mathlib/RingTheory/Ideal/Quotient/Basic.lean,Mathlib/Topology/Algebra/Valued/WithZeroMulInt.lean 2 9 ['github-actions', 'mathlib4-merge-conflict-bot', 'pechersky', 'smmercuri'] nobody
184-50750
6 months ago
238-62108
238 days ago
37-63652
37 days
28124 kckennylau
author:kckennylau
 feat(Tactic): Call an arbitrary Simproc In the current framework, `Simproc`s are declared by name, and can only be referred to by name. For example, [Nat.divisors_ofNat](https://leanprover-community.github.io/mathlib4_docs/Mathlib/Tactic/Simproc/Divisors.html#Nat.divisors_ofNat) is declared as: ```lean dsimproc_decl Nat.divisors_ofNat (Nat.divisors _) := fun e => do ``` This declaration syntax does not allow for a `Simproc` to depend on any arguments, and even if one constructed a `Simproc` that depends on e.g. a natural number, such as `foo : ℕ → Simproc`, one still cannot call it using the syntax `by simp [foo 37]`. Therefore, this new function aims to solve this problem, by allowing an arbitrary `Simproc` to be executed, using the newly defined function `Lean.Meta.Simp.Simproc.apply (s : Simproc) : TacticM Unit`. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-meta 79/0 Mathlib.lean,Mathlib/Tactic.lean,Mathlib/Tactic/Simproc/Apply.lean,MathlibTest/Simproc/Apply.lean 4 28 ['JovanGerb', 'b-mehta', 'eric-wieser', 'github-actions', 'hrmacbeth', 'kckennylau', 'mathlib4-merge-conflict-bot'] JovanGerb
assignee:JovanGerb
184-50745
6 months ago
254-42214
254 days ago
23-23815
23 days
28125 nonisomorphiclinearmap
author:nonisomorphiclinearmap
 feat(Combinatorics): basic definition of simplicial complexes This PR introduces the basic definition of a finite (abstract) simplicial complex, located in Mathlib/Combinatorics/SimplicialComplex/Basic.lean. --- This is our first contribution to mathlib. This work was done as part of the Fields Institute Summer Undergraduate Program on formalization in topological combinatorics. Eventually, we aim to formalize Lovasz's proof of the Kneser Conjecture and this is a small stepping stone in that direction. Some other commits will shortly depend on this one. We would like to acknowledge the Fields Institute for Research in Mathematical Sciences for their sponsorship. We would also like to thank our supervisors, Professor Chris Kapulkin and Mr. Daniel Carranza, for their guidance and support throughout this project. We would also like to thank our group members Tom Lindquist and Quang Minh Nguyen for our fruitful discussions. merge-conflict t-combinatorics new-contributor 374/0 Mathlib.lean,Mathlib/Combinatorics/SimplicialComplex/Basic.lean,Mathlib/Combinatorics/SimplicialComplex/Category.lean,Mathlib/Combinatorics/SimplicialComplex/FacePoset.lean,Mathlib/Combinatorics/SimplicialComplex/Hom.lean 5 2 ['github-actions', 'mathlib4-merge-conflict-bot'] awainverse
assignee:awainverse
184-50744
6 months ago
184-50745
184 days ago
99-64548
99 days
28316 eric-wieser
author:eric-wieser
 feat(Tactic/NormNum): better trace nodes Comparing the infoview on the first example in the test file | Before | After | |---|---| | image | image| In the after version, the extension names are all clickable. Similar to #21450. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-meta 136/5 Mathlib.lean,Mathlib/Tactic/NormNum/Core.lean,Mathlib/Util/Trace.lean,MathlibTest/norm_num_trace.lean 4 20 ['JovanGerb', 'eric-wieser', 'github-actions', 'kmill', 'leanprover-bot', 'mathlib-bors', 'mathlib4-merge-conflict-bot', 'plp127'] JovanGerb
assignee:JovanGerb
184-50738
6 months ago
267-7625
267 days ago
15-76174
15 days
28325 pechersky
author:pechersky
 feat(WithZeroTopology): `locallyCompactSpace_iff_locallyFiniteOrder_units` On the way to golf/generalize the proof that locally compact valued fields have locally finite valuation groups as embodied in `Valued.integer.locallyFiniteOrder_units_mrange_of_isCompact_integer` ] --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-topology t-order large-import 81/2 Mathlib/Topology/Algebra/GroupWithZero.lean,Mathlib/Topology/Algebra/WithZeroTopology.lean,Mathlib/Topology/Compactness/Compact.lean 3 13 ['erdOne', 'github-actions', 'kckennylau', 'mathlib4-merge-conflict-bot', 'ocfnash'] PatrickMassot
assignee:PatrickMassot
184-50737
6 months ago
189-19015
189 days ago
93-41632
93 days
28349 kckennylau
author:kckennylau
 feat(Meta): add notation for naming stacked polynomials This PR changes the notation for naming formal variables associated to recursive polynomial-like objects. Registration is done only once per each polynomial-like functor. Usage: ```lean register_poly_vars "[" "]" Polynomial Polynomial.C Polynomial.X register_poly_vars (mv := true) "[" "]" MvPolynomial MvPolynomial.C MvPolynomial.X name_poly_vars R[a,b][C] name_poly_vars _[x,y,z] ``` `_[[x,y,z]]` allows for the hole to be substituted by any base ring, so `(x : R[[x,y,z]])` will be valid syntax. There has been some discussion about its implementation: * It has been suggested that `R[x,y][z]` should mean that `R[x,y]` is a subring, i.e. `x` should live in `R[x,y]`, but in my implementation `x` lives in the big ring `R[x,y][z]`. There are two ways to get the other behaviour: * One can do `R[x,y]` and then `(R[x,y])[z]`. * One can do `R[a,b]` and `R[x,y][z]`. I personally prefer this one because we should make it clearer that they are different rings. * There has been some discussion over what `R` means. In my implementation, if you ever refer to a `variable` called `R`, then `R` is fixed to that variable, meaning that if you later define a variable with the same name, `R` will still refer to the old variable. Also, this does not respect namespace, meaning that if you refer to `Foo.bar[x,y]`, and later open `Foo`, you will not be able to access the declared ring with `bar[x,y]`. --- I have not mass deployed the new syntax at every possible location, I plan to do that in a future PR following this. Zulip: [#mathlib4 > Notation for polynomial variables](https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/Notation.20for.20polynomial.20variables) This is a refactor of the currently existing [Mathlib.Tactic.namePolyVarsOver](https://leanprover-community.github.io/mathlib4_docs/Mathlib/Tactic/Ring/NamePolyVars.html#Mathlib.Tactic.namePolyVarsOver). More explicitly, the current invocation `name_poly_vars x,y over R` is now `poly_variable R[x,y]`. The behaviours inherited from `name_poly_vars` are: * We do not synthesize the necessary instances (such as `[CommRing R]`) at the point of declaration, but only when the new notations are used. * We refer to an explicit term (`R` in the examples) which is "fixed", in the sense that: * it is only valid for `R` explicitly, and not any other `variable` such as `S`. * it has built-in hygiene, so if you shadow the variable by declaring a new `variable (R : Type*)`, it will still refer to the old one. And the new behaviours are: * Currently only `x` and `y` are new notations, but in the new tactic the whole ring `R[x,y]` is also available as notation. * Currently only the forward direction (i.e. elaboration, going from `x` to `MvPolynomial.X 0`) is implemented, but in the new tactic we also implement the backward direction, printing `MvPolynomial.X 0` back as `x` (and `MvPolynomial (Fin 2) R` is printed as `R[x,y]`). * Support beyond just `MvPolynomial`. * Support for nested polynomial-like rings, such as `R[x,y][t][[z]]` for `PowerSeries (Polynomial (MvPolynomial (Fin 2) R))`. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict awaiting-author t-meta 778/87 Counterexamples/CliffordAlgebraNotInjective.lean,Mathlib.lean,Mathlib/Algebra/MvPolynomial/Basic.lean,Mathlib/AlgebraicGeometry/EllipticCurve/Jacobian/Basic.lean,Mathlib/AlgebraicGeometry/EllipticCurve/Projective/Basic.lean,Mathlib/Tactic.lean,Mathlib/Tactic/PolyVariable.lean,Mathlib/Tactic/Ring/NamePolyVars.lean,MathlibTest/PolyVariable.lean,scripts/noshake.json 10 110 ['JovanGerb', 'adamtopaz', 'chrisflav', 'eric-wieser', 'github-actions', 'j-loreaux', 'kckennylau', 'kim-em', 'mathlib4-merge-conflict-bot', 'plp127', 'robertmaxton42', 'sgouezel'] adamtopaz
assignee:adamtopaz
184-50734
6 months ago
191-42074
191 days ago
58-1196
58 days
28530 nonisomorphiclinearmap
author:nonisomorphiclinearmap
 feat(Combinatorics/SimplicialComplex/Topology): add standard simplices and geometric realisation (colimit + functoriality) Introduce the standard simplex on a finite vertex set and build the geometric realisation |X| of a simplicial complex. Prove that |X| is the colimit of the face diagram δ_X : X.faces ⥤ TopCat, and define the induced map on realisations |φ| : |X| ⟶ |Y| for a simplicial map φ. Show that the abstract map from colimit functoriality agrees with the concrete push-forward of barycentric coordinates. Package these into a functor SimplicialComplexCat ⥤ TopCat. --- This is our first contribution to mathlib. This work was done as part of the Fields Institute Summer Undergraduate Program on formalization in topological combinatorics. Eventually, we aim to formalize Lovasz's proof of the Kneser Conjecture and this lays the groundwork to do this. We would like to acknowledge the Fields Institute for Research in Mathematical Sciences for their sponsorship. We would also like to thank our supervisors, Professor Chris Kapulkin and Mr. Daniel Carranza, for their guidance and support throughout this project. I would also like to thank our group members Sebastian Kumar, Tom Lindquist and Quang Minh Nguyen for our fruitful discussions. - [ ] depends on: #28125 merge-conflict blocked-by-other-PR t-combinatorics new-contributor 1826/0 Mathlib.lean,Mathlib/Combinatorics/SimplicialComplex/Basic.lean,Mathlib/Combinatorics/SimplicialComplex/Category.lean,Mathlib/Combinatorics/SimplicialComplex/FacePoset.lean,Mathlib/Combinatorics/SimplicialComplex/Hom.lean,Mathlib/Combinatorics/SimplicialComplex/Topology/GeomReal/Basic.lean,Mathlib/Combinatorics/SimplicialComplex/Topology/GeomReal/Colimit.lean,Mathlib/Combinatorics/SimplicialComplex/Topology/GeomReal/Diagram.lean,Mathlib/Combinatorics/SimplicialComplex/Topology/GeomReal/Functor.lean,Mathlib/Combinatorics/SimplicialComplex/Topology/GeomReal/Map.lean,Mathlib/Combinatorics/SimplicialComplex/Topology/Simplex.lean,Mathlib/Combinatorics/SimplicialComplex/Topology/SimplexMap.lean 12 3 ['github-actions', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
184-50730
6 months ago
279-4558
279 days ago
0-591
9 minutes
28868 yury-harmonic
author:yury-harmonic
 feat(Positive): add `OfNat` instance Also fix defeq for `Div` in the `Group` instance. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-algebra large-import
label:t-algebra$
 41/13 Mathlib/Algebra/Order/Positive/Field.lean,Mathlib/Algebra/Order/Positive/Ring.lean,Mathlib/Data/PNat/Defs.lean 3 3 ['github-actions', 'mathlib4-merge-conflict-bot', 'yury-harmonic'] nobody
184-50592
6 months ago
271-8581
271 days ago
0-2821
47 minutes
28871 JaafarTanoukhi
author:JaafarTanoukhi
 feat(Combinatorics/Digraph): Tournaments Define orientations and tournaments. Related to #26771. Co-authored-by: Rida Hamadani --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-combinatorics new-contributor 62/0 Mathlib.lean,Mathlib/Combinatorics/Digraph/Orientation.lean,Mathlib/Combinatorics/Digraph/Tournament.lean 3 6 ['JaafarTanoukhi', 'Rida-Hamadani', 'SnirBroshi', 'github-actions', 'mathlib4-merge-conflict-bot'] kmill
assignee:kmill
184-50591
6 months ago
184-50592
184 days ago
55-54919
55 days
29108 JonBannon
author:JonBannon
 feat(MeasureTheory): add `LInfty.lean` with `Mul` and `const` related results. Continuing to develop pieces needed for a `CStarAlgebra` instance for `Lp R ∞ μ`, we introduce a file `MeasureTheory.Function.LInfty.lean` that takes `MeasureTheory.Function.LpSpace.Basic` and `MeasureTheory.Function.Holder` as imports, and introduces the `Mul` instance on Linfty, and const-related results. In a future PR we will handle `One`, as this will require dealing with `AEEqFun` as well as `Lp` level objects and it's probably best to handle these together in a single PR. We opted to add this file to keep imports light, since adding the `Mul` results to `Basic` would require importing `Holder`, and including these results in `Holder` seemed too specific and would make `Holder` heavier. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict awaiting-author t-measure-probability 91/0 Mathlib.lean,Mathlib/MeasureTheory/Function/LInfty.lean 2 6 ['JonBannon', 'github-actions', 'j-loreaux', 'mathlib4-merge-conflict-bot'] nobody
184-50584
6 months ago
262-16081
262 days ago
4-7234
4 days
29481 llllvvuu
author:llllvvuu
 feat(LinearAlgebra/Eigenspace): roots of matrix minpoly give spectrum This is derived from the corresponding result on linear maps. --- - [x] depends on: #29478 for some simp lemmas [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-algebra large-import
label:t-algebra$
 13/0 Mathlib/LinearAlgebra/Eigenspace/Minpoly.lean 1 5 ['github-actions', 'llllvvuu', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
184-50559
6 months ago
254-78875
254 days ago
0-13173
3 hours
29526 llllvvuu
author:llllvvuu
 feat: `Multiset.map f` identifies `f` up to permutation Motivation: Reason about `Fintype`-indexed families via `Multiset` equality. Example use case 1: ```lean theorem Matrix.IsHermitian.cfc_eigenvalues {d : Type*} [Fintype d] [DecidableEq d] {M : Matrix d d 𝕜} (hM : M.IsHermitian) (f : ℝ → ℝ) (hcfc : Matrix.IsHermitian (cfc f M) := cfc_predicate f M) : ∃ (e : d ≃ d), hcfc.eigenvalues = f ∘ hM.eigenvalues ∘ e := by have := hcfc.roots_charpoly_eq_eigenvalues.symm rw [hM.charpoly_cfc_eq f, Polynomial.roots_prod] at this; swap · simp [Finset.prod_ne_zero_iff, Polynomial.X_sub_C_ne_zero] simp_rw [Polynomial.roots_X_sub_C, Multiset.bind_singleton] at this have he := (Multiset.compTriple_equivOfMapUnivEq this).comp_eq simp_rw [← Function.comp_def RCLike.ofReal, ← Function.comp_def f, Function.comp_assoc] at he exact ⟨_, RCLike.ofReal_injective.comp_left he.symm⟩ ``` Example use case 2 (on top of https://github.com/leanprover-community/mathlib4/pull/29610): ```lean theorem LinearMap.Eigenbasis.μ_equiv {ι ι' R G : Type*} [Fintype ι] [Fintype ι'] [CommRing R] [IsDomain R] [AddCommGroup G] [Module R G] [Module.Free R G] [Module.Finite R G] {f : Module.End R G} (B₁ : f.Eigenbasis ι) (B₂ : f.Eigenbasis ι') : ∃ e : ι ≃ ι', B₁.μ = B₂.μ ∘ e := by classical have := congr(Polynomial.roots $(B₁.charpoly_eq.symm.trans B₂.charpoly_eq)) rw [Polynomial.roots_prod, Polynomial.roots_prod] at this; rotate_left · simp [Finset.prod_ne_zero_iff, Polynomial.X_sub_C_ne_zero] · simp [Finset.prod_ne_zero_iff, Polynomial.X_sub_C_ne_zero] simp_rw [Polynomial.roots_X_sub_C, Multiset.bind_singleton] at this exact ⟨Multiset.equivOfMapUnivEq this, (Multiset.compTriple_equivOfMapUnivEq this).comp_eq.symm⟩ ``` Co-authored-by: Aristotle Harmonic --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-data 35/0 Mathlib/Data/Multiset/Fintype.lean 1 9 ['Ruben-VandeVelde', 'github-actions', 'llllvvuu', 'mathlib4-merge-conflict-bot', 'vihdzp', 'wwylele'] pechersky
assignee:pechersky
184-50553
6 months ago
184-50554
184 days ago
69-23034
69 days
29675 yury-harmonic
author:yury-harmonic
 feat(Wolstenholme): new file Co-authored-by: @Aristotle-Harmonic --- I still need to cleanup the proof and write the docs. For now, it's just what the AI generated, forward-ported to the latest Mathlib. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict awaiting-author help-wanted t-data 198/0 Mathlib.lean,Mathlib/Data/Nat/Choose/Wolstenholme.lean 2 5 ['Alex-Linhares', 'github-actions', 'mathlib4-merge-conflict-bot', 'yury-harmonic'] nobody
184-49982
6 months ago
249-27683
249 days ago
0-125
2 minutes
29720 javra
author:javra
 feat(CategoryTheory): `TransportEnrichment` and `ForgetEnrichment` as 2-functors --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict WIP t-category-theory 63/1 Mathlib/CategoryTheory/Enriched/Basic.lean,Mathlib/CategoryTheory/Enriched/EnrichedCat.lean 2 2 ['github-actions', 'mathlib4-merge-conflict-bot'] nobody
184-49975
6 months ago
248-29106
248 days ago
0-24
24 seconds
29827 js2357
author:js2357
 feat: define two (trivial) ContinuousMulEquivs Define two trivial `ContinuousMulEquiv`s: `ContinuousMulEquiv.piUnique` is the topological version of `MulEquiv.piUnique`. `ContinuousMulEquiv.piEquivPiSubtypeProd` is the multiplicative version of `Homeomorph.piEquivPiSubtypeProd`. Done for the FLT project. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-topology FLT large-import 25/0 Mathlib/Topology/Algebra/ContinuousMonoidHom.lean 1 3 ['github-actions', 'grunweg', 'mathlib4-merge-conflict-bot'] nobody
184-49961
6 months ago
244-51723
244 days ago
0-18297
5 hours
29947 JaafarTanoukhi
author:JaafarTanoukhi
 feat(Combinatorics/Digraph): Maps Ported `SimpleGraph/Maps.lean` to `Digraph/Maps.lean` for future PRs related to issue #[26771](https://github.com/leanprover-community/mathlib4/issues/26771) --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-combinatorics new-contributor 476/0 Mathlib.lean,Mathlib/Combinatorics/Digraph/Maps.lean 2 2 ['github-actions', 'mathlib4-merge-conflict-bot'] awainverse
assignee:awainverse
184-49957
6 months ago
184-49958
184 days ago
54-82760
54 days
30022 ADedecker
author:ADedecker
 feat: theory of `IsRightUniformGroup` and `IsLeftUniformGroup` --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-topology 799/150 Mathlib/Topology/Algebra/IsUniformGroup/Basic.lean,Mathlib/Topology/Algebra/IsUniformGroup/Defs.lean 2 7 ['github-actions', 'mathlib4-merge-conflict-bot'] nobody
184-49943
6 months ago
unknown
0-0
0 seconds
30042 JovanGerb
author:JovanGerb
 feat(push): `@[push]` attributes for `∈` in `Set`, `Finset` and `Multiset` This PR adds `@[push]` annotations for the membership relations, for `Set`, `Finset` and `Multiset`. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict awaiting-author t-meta 171/105 Mathlib/Algebra/BigOperators/Group/Finset/Basic.lean,Mathlib/Algebra/Group/Pointwise/Finset/Basic.lean,Mathlib/Algebra/Group/Pointwise/Set/Basic.lean,Mathlib/Algebra/Group/Pointwise/Set/ListOfFn.lean,Mathlib/Algebra/Order/Group/Multiset.lean,Mathlib/Data/DFinsupp/Interval.lean,Mathlib/Data/Finmap.lean,Mathlib/Data/Finset/BooleanAlgebra.lean,Mathlib/Data/Finset/Dedup.lean,Mathlib/Data/Finset/Defs.lean,Mathlib/Data/Finset/Disjoint.lean,Mathlib/Data/Finset/Filter.lean,Mathlib/Data/Finset/Image.lean,Mathlib/Data/Finset/Insert.lean,Mathlib/Data/Finset/Lattice/Basic.lean,Mathlib/Data/Finset/Lattice/Fold.lean,Mathlib/Data/Finset/Pi.lean,Mathlib/Data/Finset/Powerset.lean,Mathlib/Data/Finset/Range.lean,Mathlib/Data/Finset/SDiff.lean,Mathlib/Data/Finset/Sigma.lean,Mathlib/Data/Finset/Sort.lean,Mathlib/Data/Finset/Sum.lean,Mathlib/Data/Finset/Sups.lean,Mathlib/Data/Finset/Union.lean,Mathlib/Data/Fintype/Defs.lean,Mathlib/Data/Multiset/AddSub.lean,Mathlib/Data/Multiset/Antidiagonal.lean,Mathlib/Data/Multiset/Bind.lean,Mathlib/Data/Multiset/Dedup.lean,Mathlib/Data/Multiset/Defs.lean,Mathlib/Data/Multiset/Filter.lean,Mathlib/Data/Multiset/FinsetOps.lean,Mathlib/Data/Multiset/MapFold.lean,Mathlib/Data/Multiset/Pi.lean,Mathlib/Data/Multiset/Range.lean,Mathlib/Data/Multiset/Replicate.lean,Mathlib/Data/Multiset/Sort.lean,Mathlib/Data/Multiset/Sum.lean,Mathlib/Data/Multiset/UnionInter.lean,Mathlib/Data/Multiset/ZeroCons.lean,Mathlib/Data/Set/Basic.lean,Mathlib/Data/Set/Insert.lean,Mathlib/Data/Set/Operations.lean,Mathlib/Order/Interval/Finset/Defs.lean,Mathlib/Order/Interval/Multiset.lean,Mathlib/Order/Interval/Set/Defs.lean,Mathlib/Order/SetNotation.lean,MathlibTest/push.lean 49 14 ['JovanGerb', 'github-actions', 'grunweg', 'mathlib4-merge-conflict-bot'] grunweg
assignee:grunweg
184-49938
6 months ago
192-23335
192 days ago
23-81049
23 days
30330 Bergschaf
author:Bergschaf
 feat(Algebra/Group/Action/Equidecomp): Mathlib's definition of Equidecomposability is equivalent to the standart one using partitions --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-algebra large-import
label:t-algebra$
 329/1 Mathlib/Algebra/Group/Action/Equidecomp.lean 1 6 ['Bergschaf', 'Felix-Weilacher', 'github-actions', 'mathlib4-merge-conflict-bot'] Vierkantor
assignee:Vierkantor
184-49780
6 months ago
207-27220
207 days ago
15-53183
15 days
30374 FLDutchmann
author:FLDutchmann
 feat(Tactic): `algebra` and `polynomial` tactic suite Implement a suite of tactics for normalizing expressions in an algebra over a ring. Handles all of the normal `ring` operations as well as scalar multiplication over a fixed base ring. Using these, implement tactics to normalize `(Mv)Polynomial` expressions into a sum-of-monomials form. Specifically, * `algebra` proves equality of expressions in an algebra over a ring like `ring1` * `algebra_nf` puts expressions in an algebra into a normal form, like `ring_nf` * `match_scalars_alg` (name pending) closes an equality goal by calling `algebra_nf` and creating side goals equating matching coefficients in the base ring. Like `match_scalars`. * `polynomial` proves equality of (mv)polynomials * `polynomial_nf` expands polynomials into a sum-of-monomials form, combining coefficients in the base ring (e.g. `C a * X + C b * X` normalizes to `C(a+b) * X` * `match_coefficients` expands polynomials and produces side goals equating matching coefficients. - [x] depends on: #31506 - [x] depends on: #31508 - [ ] depends on: #31513 --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict awaiting-author blocked-by-other-PR t-meta 2371/0 Mathlib.lean,Mathlib/Tactic.lean,Mathlib/Tactic/Algebra.lean,Mathlib/Tactic/Algebra/Lemmas.lean,Mathlib/Tactic/Polynomial.lean,Mathlib/Tactic/Polynomial/Core.lean,MathlibTest/Polynomial.lean,MathlibTest/algebra.lean,scripts/noshake.json 9 7 ['FLDutchmann', 'github-actions', 'hrmacbeth', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
184-49761
6 months ago
unknown
0-0
0 seconds
30392 urkud
author:urkud
 feat: define pullback quotient maps --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-topology 287/0 Mathlib.lean,Mathlib/Topology/ClusterPt.lean,Mathlib/Topology/Maps/PullbackQuotient.lean 3 2 ['github-actions', 'mathlib4-merge-conflict-bot'] nobody
184-49756
6 months ago
unknown
0-0
0 seconds
30933 joelriou
author:joelriou
 feat(CategoryTheory): the linearization of a category Let `C` be a category and `R` be a commutative ring. We construct a `R`-linear category `Linearization C R` and a functor `toLinearization C R : C ⥤ Linearization C R`. The morphisms in `Linearization C R` are the free `R`-modules on the types of morphisms in `C`. (In the context of singular homology with coefficients `R`, chains of a fixed degree shall identify to morphisms in `Linearization TopCat R`, and doing certain computations for arbitrary coefficients should reduce to computations with `R := ℤ`.) --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict awaiting-author t-category-theory 134/0 Mathlib.lean,Mathlib/CategoryTheory/Linear/Linearization.lean 2 4 ['github-actions', 'joelriou', 'kim-em', 'mathlib4-merge-conflict-bot'] nobody
184-49448
6 months ago
205-77466
205 days ago
2-33570
2 days
31314 hrmacbeth
author:hrmacbeth
 feat: linters for recommended `field_simp` style --- - [x] depends on: #31472 - [x] depends on: #31483 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-linter awaiting-CI 93/1 Mathlib.lean,Mathlib/Lean/Meta/WarningAsError.lean,Mathlib/Tactic/Field.lean 3 5 ['github-actions', 'grunweg', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
184-49248
6 months ago
unknown
0-0
0 seconds
31351 grunweg
author:grunweg
 feat: manifolds with smooth boundary Needs polish, and closing the remaining sorries (or deciding they can be postponed later). From my bordism theory project. --- - [x] depends on: #22070 - [x] depends on: #22128 - [x] depends on: #22131 - [x] depends on: #22082 - [x] depends on: #22113 - [x] depends on: #22105 - [x] depends on: #26099 - [x] depends on: #30049 (preliminary code clean-up) - [x] depends on: #29589 - [x] ~~depends on: https://github.com/grunweg/mathlib4/tree/mfderiv-prodmap for actually proving the mfderiv sorry about products I need~~ done now - [ ] depends on: #31200 (and its companion result, about Sum.map) - [ ] depends on #23040 for the mathlib-level definition of smooth immersions and embeddings This PR continues the work from #22059. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict WIP t-differential-geometry 591/0 Mathlib.lean,Mathlib/Geometry/Manifold/HasSmoothBoundary.lean 2 2 ['github-actions', 'mathlib4-dependent-issues-bot'] nobody
184-49022
6 months ago
196-45790
196 days ago
0-13
13 seconds
14704 Command-Master
author:Command-Master
 feat(FieldTheory): define typeclass for simple extensions, and prove some properties Define `SimpleExtension F K`, which says that `K` is a simple field extension of `F`, and show that together with transcendentality it implies `IsFractionRing F[X] K`. --- - [x] depends on: #14710 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) WIP t-algebra new-contributor merge-conflict awaiting-author
label:t-algebra$
 120/0 Mathlib.lean,Mathlib/FieldTheory/SimpleExtension.lean 2 19 ['Command-Master', 'acmepjz', 'github-actions', 'leanprover-community-mathlib4-bot', 'mathlib4-merge-conflict-bot', 'tb65536'] nobody
184-46789
6 months ago
628-39903
628 days ago
48-65595
48 days
31356 adomani
author:adomani
 feat: add inspect-like functions Produces a tree-like formatting for `Syntax`, `Expr` and `InfoTree`. Especially for the `InfoTree`s, there are *many* parts of it that do not get printed. For instance, this is how the `InfoTree`s of `set_option linter.missingDocs true` get printed: ```lean inspectIT set_option linter.missingDocs true /- commandCtx |-Info.ofCommandInfo: Lean.Elab.Command.elabSetOption, 'set_option…gDocs true' | |-Info.ofCompletionInfo.CompletionInfo.option 'set_option…issingDocs' | |-Info.ofOptionInfo: linter.missingDocs, Linter.linter.missingDocs -/ ``` --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-meta 720/0 Mathlib.lean,Mathlib/Util/Inspect.lean,MathlibTest/Inspect.lean 3 3 ['github-actions', 'mathlib4-merge-conflict-bot', 'plp127'] kim-em
assignee:kim-em
184-44978
6 months ago
184-44979
184 days ago
11-61697
11 days
31604 maksym-radziwill
author:maksym-radziwill
 feat: analyticity of dslope This adds a few simple functions to show that ``dslope f a`` is analytic when ``f`` is. This is needed for Borel-Caratheodory, see https://github.com/leanprover-community/mathlib4/pull/30424 --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict awaiting-author t-analysis 51/0 Mathlib.lean,Mathlib/Analysis/Analytic/Dslope.lean 2 26 ['github-actions', 'grunweg', 'maksym-radziwill', 'mathlib4-merge-conflict-bot'] nobody
184-44682
6 months ago
189-85998
189 days ago
0-3879
1 hour
31738 robertmaxton42
author:robertmaxton42
 feat: quivers can be represented as functors from the walking quiver Add definitions and associated lemmas for representing quivers as functors from the category `1 ⇉ 0`, i.e. `WalkingParallelPairᵒᵖ`. New definitions: * `asFunctor` itself, which is defined as a bare function with an associated `Functorial` instance so that it can be used with generalized projection notation * `src` and `tgt`, abbreviations for `F.map left.op` and `F.map right.op` for a functor `F : WalkingParallelPairᵒᵖ ⥤ Type w` * `Vertex`, `Edges`, and `Edge`, abbreviations for `F.obj 0` (interpreted as the type of vertices), `F.obj 1` (interpreted as the total type of all edges), and `{e : F.obj 1 // src e = s ∧ tgt e = t}` for some pair of vertices `s` and `t` (interpreted as the hom-type `s ⟶ t`) * `edgeOfEq`, the equivalent of `Quiver.homOfEq` for edges in quivers in functor form. --- This PR begins the first of a series proving that the category `Quiv.{v, u}` is equivalent to the subcategory of $$\mathbf{PSh}(\mathbf{WQuiv}^\mathrm{op})$$ which are appropriately '`u`-small' and 'locally `v`-small'. The original PR (prior to the move to forks) created a custom type `WalkingQuiver` for this purpose; ultimately I found that `WalkingParallelPairᵒᵖ` served my purposes well enough. Following this PR will be one constructing the adjoint `ofFunctor`, plus several showing that `asFunctor` and `ofFunctor` can be assembled into an equivalence and proving various properties of quivers in functor form necessary for the construction of colimits. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict awaiting-author t-category-theory 397/0 Mathlib.lean,Mathlib/CategoryTheory/Category/Quiv/AsOfFunctor.lean 2 13 ['github-actions', 'joelriou', 'mathlib4-merge-conflict-bot', 'robertmaxton42'] nobody
184-44639
6 months ago
186-59754
186 days ago
0-1741
29 minutes
31590 SuccessMoses
author:SuccessMoses
 chore: tag `commutatorElement_def` with `simp` --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) awaiting-author t-algebra new-contributor merge-conflict
label:t-algebra$
 1/0 Mathlib/Algebra/Group/Commutator.lean 1 3 ['github-actions', 'grunweg', 'mathlib-merge-conflicts'] nobody
184-24664
6 months ago
184-24664
184 days ago
6-8213
6 days
25802 dagurtomas
author:dagurtomas
 feat(AlgebraicTopology): anodyne morphisms of simplicial sets --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) --- *This PR continues the work from #20201.* *Original PR: https://github.com/leanprover-community/mathlib4/pull/20201* WIP t-topology 145/0 Mathlib/AlgebraicTopology/Anodyne.lean,Mathlib/AlgebraicTopology/KanFibration.lean,Mathlib/CategoryTheory/MorphismProperty/WeakSaturation.lean 3 2 ['github-actions', 'mathlib4-merge-conflict-bot'] nobody
184-24571
6 months ago
344-39735
344 days ago
0-2
2 seconds
6268 eric-wieser
author:eric-wieser
 fix: fixups to #3838 This is an attempt to make #3838 universe polymorphic --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) * Depends on #6271 * Depends on #8876 merge-conflict WIP 186/107 Mathlib/Control/Random.lean,Mathlib/Tactic/SlimCheck.lean,Mathlib/Testing/SlimCheck/Functions.lean,Mathlib/Testing/SlimCheck/Gen.lean,Mathlib/Testing/SlimCheck/Sampleable.lean,Mathlib/Testing/SlimCheck/Testable.lean,test/slim_check.lean 7 10 ['github-actions', 'kim-em'] nobody
184-23915
6 months ago
unknown
0-0
0 seconds
6859 MohanadAhmed
author:MohanadAhmed
 feat: TryLean4Bundle: Windows Bundle Creator # `TryLean4Bundle`: Windows Bundle Creator A Windows batch script and a CI yml file that create an self extracting archive. The user should 1. just download the archive, 2. double click the archive to expand 3. double click the `RunLean.bat` script in the expanded archive. The script currently downloads 7 dependencies into CI then unpacks them in the appropriate locations and finally packs them back. To try a bundle created using these scripts but from a different repo see (https://github.com/MohanadAhmed/TryLean4Bundle/releases) --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) WIP help-wanted CI 114/0 .github/workflows/mk_windows_bundle.yml,scripts/windowsBundle.bat 2 0 [] nobody
184-23907
6 months ago
996-79020
996 days ago
0-434
7 minutes
6993 jjaassoonn
author:jjaassoonn
 feat: lemmas about `AddMonoidAlgebra.{divOf, modOf}` --- - [x] depends on: #7582 - [x] depends on: #8975 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-algebra
label:t-algebra$
 147/3 Mathlib/Algebra/MonoidAlgebra/Division.lean,Mathlib/Data/Finsupp/Basic.lean,Mathlib/Data/MvPolynomial/Basic.lean,Mathlib/Data/MvPolynomial/CommRing.lean,Mathlib/Data/MvPolynomial/Division.lean 5 42 ['YaelDillies', 'alreadydone', 'digama0', 'eric-wieser', 'github-actions', 'jjaassoonn', 'leanprover-community-mathlib4-bot'] nobody
184-23902
6 months ago
854-28655
854 days ago
103-330
103 days
7427 MohanadAhmed
author:MohanadAhmed
 feat: eigenvalues sorted in ascending/descending order In the file `Analysis.InnerProductSpace.Spectrum` todo notes were left saying: > TODO Postcompose with a permutation so that these eigenvectors are listed in increasing order of eigenvalue. > TODO Postcompose with a permutation so that these eigenvalues are listed in increasing order. - This is a start in that direction --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict WIP 162/4 Mathlib/Analysis/InnerProductSpace/Spectrum.lean,Mathlib/Analysis/NormedSpace/PiLp.lean,Mathlib/LinearAlgebra/Matrix/Spectrum.lean 3 0 [] nobody
184-23870
6 months ago
unknown
0-0
0 seconds
9339 FMLJohn
author:FMLJohn
 feat(RingTheory/GradedAlgebra/HomogeneousIdeal): given a finitely generated homogeneous ideal of a graded semiring, construct a finite spanning set for the ideal which only contains homogeneous elements --- - [ ] depends on: #8187 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-ring-theory 402/4 Mathlib.lean,Mathlib/Algebra/DirectSum/Internal.lean,Mathlib/Algebra/GradedMonoid.lean,Mathlib/Algebra/Module/GradeZeroModule.lean,Mathlib/RingTheory/Finiteness.lean,Mathlib/RingTheory/GradedAlgebra/Basic.lean,Mathlib/RingTheory/GradedAlgebra/HomogeneousIdeal.lean,Mathlib/RingTheory/GradedAlgebra/Noetherian.lean 8 11 ['FMLJohn', 'github-actions', 'jjaassoonn', 'leanprover-community-mathlib4-bot'] nobody
184-23855
6 months ago
868-28833
868 days ago
6-63597
6 days
9564 AntoineChambert-Loir
author:AntoineChambert-Loir
 chore: weaken commutativity assumptions for AdjoinRoot.lift and AdjoinRoot.liftHom I weaken a commutativity assumption for docs#AdjoinRoot.liftHom that the target algebra be commutative. It is only assumed to be a Semiring. For that, I need to generalize docs#AdjoinRoot.lift which takes `i : R ->+* S`, `a : S` with `f.eval₂ i a = 0` and defines `AdjoinRoot f ->+* S` that extends `i ` and sends `AdjoinRoot.root f` to `a`. --- The initial version of the PR was to define `AdjoinRoot.lift'` where `S` is only a Semiring, with the additional assumption `hcomm : ∀ r, Commute (i r) a` that the element `a` commutes with the image of `i`. @jcommelin suggested to provide this argument as an `autoParam`, filled in by an ad hoc `commutativity` tactic. However, such an argument cannot be made implicit and a first version required to have this argument given each time, most of the time by `_`, even for all subsequent lemmas, `AdjoinRoot.lift_mk`, etc. To avoid this, I tried to make this assumption a `⦃hcomm : ∀ r, Commute (i r) a⦄`. This appears to have some side effects that proofs using an `exact` tactic or in term mode do not work well, but one can resort on `by simp […]`. Maybe @eric-wieser or @Vierkantor will have opinions on that. In some cases one can still give the argument as `(hcomm := by commutativity)`. (There are 3 options : - separate lemmas for the fully commutative case and for the case where a proof is needed - using the `commutativity` tactic, but with an argument `_` sometimes - using the optional argument.) [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict WIP t-algebra
label:t-algebra$
 146/30 Mathlib.lean,Mathlib/Algebra/Algebra/Basic.lean,Mathlib/Algebra/Algebra/Hom.lean,Mathlib/Algebra/Group/Commute/Defs.lean,Mathlib/RingTheory/AdjoinRoot.lean,Mathlib/Tactic.lean,Mathlib/Tactic/Commutativity.lean,Mathlib/Tactic/Commutativity/Init.lean 8 14 ['AntoineChambert-Loir', 'Vierkantor', 'eric-wieser', 'jcommelin'] nobody
184-23849
6 months ago
781-16155
781 days ago
16-71959
16 days
10026 madvorak
author:madvorak
 feat: linear programming according to Antoine Chambert-Loir's book --- Zulip discussion: https://leanprover.zulipchat.com/#narrow/stream/144837-PR-reviews/topic/.237386.20Linear.20Programming Four PRs incompatible with each other: https://github.com/leanprover-community/mathlib4/pull/7386 (list of constraints) https://github.com/leanprover-community/mathlib4/pull/9693 (matrix form) https://github.com/leanprover-community/mathlib4/pull/10026 (Antoine Chambert-Loir's def; semirings, linear) https://github.com/leanprover-community/mathlib4/pull/10159 (Antoine Chambert-Loir's def; rings, affine) [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict WIP t-algebra RFC
label:t-algebra$
 86/0 Mathlib.lean,Mathlib/LinearAlgebra/LinearProgramming.lean 2 10 ['eric-wieser', 'madvorak', 'mathlib4-merge-conflict-bot', 'riccardobrasca'] nobody
184-23843
6 months ago
688-46652
688 days ago
154-48765
154 days
10159 madvorak
author:madvorak
 feat: linear programming according to Antoine Chambert-Loir's book — affine version --- Zulip discussion: https://leanprover.zulipchat.com/#narrow/stream/144837-PR-reviews/topic/.237386.20Linear.20Programming Four PRs incompatible with each other: https://github.com/leanprover-community/mathlib4/pull/7386 (list of constraints) https://github.com/leanprover-community/mathlib4/pull/9693 (matrix form) https://github.com/leanprover-community/mathlib4/pull/10026 (Antoine Chambert-Loir's def; semirings, linear) https://github.com/leanprover-community/mathlib4/pull/10159 (Antoine Chambert-Loir's def; rings, affine) [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict WIP t-algebra RFC
label:t-algebra$
 83/0 Mathlib.lean,Mathlib/LinearAlgebra/LinearProgramming.lean 2 8 ['eric-wieser', 'madvorak', 'mathlib4-merge-conflict-bot', 'riccardobrasca'] nobody
184-23836
6 months ago
688-46635
688 days ago
152-72231
152 days
10349 Shamrock-Frost
author:Shamrock-Frost
 refactor(CategoryTheory/MorphismProperty): some clean-ups We make explicit some of the galois connections/closure operators in the existing MorphismProperty file, rewrite some proofs to take advantage of these structures, and change map/inverseImage by (1) swapping their argument order, for consistency with Set.range and Set.preimage and (2) making "map" perform the strict, evil map while "essMap" (previously called map) forms the closure of the image under isomorphisms. Finally we add `IsMultiplicative` instances for isos/epis/monos, with an eye towards constructing the wide subcategory on these classes of maps. --- - [x] depends on: #10347 - [x] depends on: #10348 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-category-theory 474/318 Mathlib/CategoryTheory/Localization/Composition.lean,Mathlib/CategoryTheory/Localization/LocalizerMorphism.lean,Mathlib/CategoryTheory/MorphismProperty.lean,Mathlib/Data/Set/Lattice.lean,Mathlib/Order/Closure.lean,Mathlib/Order/Hom/Basic.lean,Mathlib/Order/Hom/CompleteLattice.lean,Mathlib/Order/RelIso/Basic.lean 8 1 ['leanprover-community-mathlib4-bot'] nobody
184-23813
6 months ago
834-78957
834 days ago
0-418
6 minutes
11021 jstoobysmith
author:jstoobysmith
 feat(AlgebraicTopology): add join of augmented SSets This pull-request adds the definition of the join of augmented SSets defined as contravariant functors from `WithInitial SimplexCategory` to `Type u`. In addition it shows that the join of two standard augmented SSets is again an augmented SSets. From this the definition of the join of simplicial sets should follow easily. To aid the above theory, an api for `WithInitial SimplexCategory` has been created, with the notion of the `join` and `split` (forming a sort of inverse to join) of objects in this category are defined. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict WIP t-algebraic-topology new-contributor 2137/1 .gitignore,Mathlib.lean,Mathlib/AlgebraicTopology/Join.lean,Mathlib/AlgebraicTopology/SimplexCategory.lean,Mathlib/AlgebraicTopology/SimplexCategoryWithInitial.lean,Mathlib/AlgebraicTopology/SimplicialSet.lean 6 47 ['github-actions', 'jcommelin'] nobody
184-23805
6 months ago
813-77650
813 days ago
1-20227
1 day
11800 JADekker
author:JADekker
 feat: KappaLindelöf spaces Define KappaLindelöf spaces by following the first one-third of the API for Lindelöf spaces. The remainder will be added in a future PR. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) please-adopt merge-conflict t-topology awaiting-zulip 301/2 Mathlib.lean,Mathlib/Topology/Compactness/KappaLindelof.lean,Mathlib/Topology/Compactness/Lindelof.lean 3 38 ['ADedecker', 'JADekker', 'PatrickMassot', 'StevenClontz', 'adomani', 'github-actions', 'grunweg', 'kim-em', 'urkud'] nobody
184-23771
6 months ago
659-44053
659 days ago
123-25636
123 days
12087 JADekker
author:JADekker
 feat: complete API for K-Lindelöf spaces --- - [ ] depends on: #11800 (which is now awaiting a design decision) [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) please-adopt merge-conflict t-topology blocked-by-other-PR 789/17 Mathlib.lean,Mathlib/Order/Filter/CardinalInter.lean,Mathlib/Topology/Compactness/KLindelof.lean,Mathlib/Topology/Compactness/Lindelof.lean 4 2 ['github-actions', 'leanprover-community-mathlib4-bot'] nobody
184-23764
6 months ago
659-43928
659 days ago
99-11243
99 days
12251 ScottCarnahan
author:ScottCarnahan
 refactor(RingTheory/HahnSeries): several generalizations This PR is a container for several smaller PRs that refactor and generalize the existing Hahn series theory. It is (I think) all we need from Hahn series to get a palatable theory of vertex algebras off the ground (other prerequisites from Lie algebras will eventually come in a different PR). Major changes include: - equivalence between iterated Hahn series and Hahn series on Lex products. - introduce `orderTop` and `leadingCoeff` functions. Here, `orderTop` is a `WithTop Γ`-valued version of `order` that does not need `[Zero Γ]` and `leadingCoeff` returns the coefficient of the minimal element of support (or zero if empty). - introduce ordered and cancellative vector addition classes together with some basic theory e.g., finiteness of antidiagonals for partially well-ordered sets. - `HahnSeries Γ R`-module structure on `HahnModule Γ' R V`, when `Γ` is an `OrderedCancelAddCommMonoid`, `Γ'` is a `PartialOrder` with `OrderedCancelVAdd Γ Γ'`, `R` is a semiring, and `V` is an `R`-module. - Move `AddVal` to a separate file - the underlying function is just `orderTop`, but the description of the valuation needs an additional import and an `IsDomain` hypothesis. Results that depended on `AddVal` are changed to use `orderTop` and generalized. --- - [x] depends on: #10781 [HahnSeries on Lex product] - [x] depends on: #10846 [HahnModule] - [x] depends on: #11965 [orderTop] - [x] depends on: #11979 [OrderedVAdd] - [x] depends on: #12996 [leadingTerm] - [x] depends on: #16649 - [x] depends on: #16701 - [x] depends on: #17004 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict WIP t-algebra t-order
label:t-algebra$
 1059/97 Mathlib/RingTheory/HahnSeries/Addition.lean,Mathlib/RingTheory/HahnSeries/Basic.lean,Mathlib/RingTheory/HahnSeries/HEval.lean,Mathlib/RingTheory/HahnSeries/Multiplication.lean,Mathlib/RingTheory/HahnSeries/PowerSeries.lean,Mathlib/RingTheory/HahnSeries/Summable.lean 6 3 ['github-actions', 'mathlib4-dependent-issues-bot'] nobody
184-23749
6 months ago
669-76296
669 days ago
42-37118
42 days
12394 JADekker
author:JADekker
 feat: define pre-tight and tight measures Define tight measures (by first defining separable and pre-tight measures). Define some api for all three concepts Prove Ulam's tightness theorem and a strengthened version of this. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) please-adopt merge-conflict awaiting-author t-measure-probability 503/0 Mathlib.lean,Mathlib/MeasureTheory/Measure/Tight.lean 2 34 ['EtienneC30', 'JADekker', 'github-actions', 'sgouezel'] nobody
184-23744
6 months ago
746-31795
746 days ago
2-24297
2 days
12452 JADekker
author:JADekker
 feat(Cocardinal): add some more api Just a small PR to add a bit more API for cocardinal filters. Not everything seems to generalise nicely from cofinite, so I didn't include such results. Currently the file has one `sorry`, I'm not sure how to complete this proof. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-topology awaiting-CI 75/0 Mathlib/Order/Filter/Cocardinal.lean 1 0 [] nobody
184-23740
6 months ago
756-20020
756 days ago
0-2075
34 minutes
14426 adomani
author:adomani
 feat: `#min_imps` command (development branch) --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict WIP 142/0 Mathlib.lean,Mathlib/Tactic.lean,Mathlib/Tactic/MinImports.lean,test/MinImports.lean 4 2 ['adomani', 'github-actions'] nobody
184-23711
6 months ago
687-3192
687 days ago
0-31
31 seconds
14686 smorel394
author:smorel394
 feat(AlgebraicGeometry/Grassmannian): define the Grassmannian scheme # The Grassmannian scheme Define the Grassmannian scheme by gluing affine charts. We fix a commutative ring `K`, a free `K`-module of finite type `V` and two natural numbers `r` and `c`. The scheme we define should parametrize surjective `K`-linear maps `V →ₗ[K] (Fin r → K)`, assuming that `V` is of rank `r + c`. We actually define the scheme without assuming the condition on the rank of `V`, but it is empty unless the rank of `V` is `r + c`. Main definitions: * `Grassmannian.glueData K V r c`: the `AlgebraicGeometry.Scheme.GlueData` defining the Grassmannian scheme. * `Grassmannian K V r c`: the Grassmannian scheme, defined as `(Grassmannian.glueData K V r c).glued`. * `Grassmannian.structMorphism K V r c`: the structural morphism from `Grassmannian K V r c` to `Spec K`. # Implementation We use as index type for the charts the type `Basis (Fin (r + c)) K V` (so this is empty unless `V` is free of rank `r + c`). All the charts are the same and equal to the affine space with coordinates indexed by `Fin c × Fin r`, that is, to `Spec (MvPolynomial (Fin c × Fin r) K)`. The idea is that, for `i` in `Basis (Fin (r + c)) K V`, the corresponding chart will parametrize all surjective `K`-linear maps `φ : V →ₗ[K] (Fin r → K)` that become isomorphisms when restricted to the `K`-submodule generated by the first `r` vectors of the basis `i`. To get the point of the chart corresponding to `φ`, we take the matrix of `φ` in the basis `i` of `V` and the canonical basis of `Fin r → K`, we divide it on the right by its top `r × r` square submatrix (which is invertible by assumption), and we taken the botton `c × r` submatrix. This is almost the usual description of the Grassmannian by charts, with three differences: * We consider the Grassmannian parametrizing `r`-dimensional quotients of `V` instead of `r`-dimensional subspaces of `V`, because this is more natural when working over a general ring (or scheme). * In the usual description, we fix a basis of `V` and index the chart by its subsets `I` of cardinality `r`. Here, to avoid making a choice, we instead index charts by the set of bases of `V` and always choose the subset `I` to consist of the first `r` vectors. * Instead of working with `FiniteDimensional.finrank K V - r`, which would cause technical trouble because of the way subtraction works on `ℕ`, we introduce the codimension `c` as an auxiliary variable, and our constructions are only interesting when `r + c` is equal to `FiniteDimensional.finrank K V`. # Why is this a WIP * There a bunch of lemmas in the file `AlgebraicGeometry/Grassmannian/Lemmas.lean` that either should not be necessary or should be put in another PR for some other part of mathlib. * The proofs in `AlgebraicGeometry/Grassmannian/Basic.lean` are probably too complicated, and the names suck. # Notes. This contribution was created as part of the AIM workshop "Formalizing algebraic geometry" in June 2024. --- - [x] depends on: #14711 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) please-adopt WIP workshop-AIM-AG-2024 merge-conflict t-algebraic-geometry 1002/0 Mathlib.lean,Mathlib/AlgebraicGeometry/Grassmannian/Basic.lean,Mathlib/AlgebraicGeometry/Grassmannian/Lemmas.lean 3 15 ['erdOne', 'github-actions', 'joelriou', 'leanprover-community-mathlib4-bot', 'smorel394'] nobody
184-23700
6 months ago
679-9707
679 days ago
0-201
3 minutes
17071 ScottCarnahan
author:ScottCarnahan
 feat(LinearAlgebra/RootSystem): separation, base, cartanMatrix This PR defines an abstract separation structure for roots, together with the associated base and Cartan Matrix. In general, the good properties will follow from additional order hypotheses on the base ring (implemented in a future PR). --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict WIP t-algebra
label:t-algebra$
 111/0 Mathlib.lean,Mathlib/LinearAlgebra/RootSystem/Separation.lean 2 1 ['github-actions'] nobody
184-23665
6 months ago
585-14125
585 days ago
20-56416
20 days
17471 joelriou
author:joelriou
 feat(Algebra/ModuleCat/Differentials/Sheaf): the sheaf of relative differentials --- - [ ] depends on: #17366 - [x] depends on: #17388 - [x] depends on: #16755 - [ ] depends on: #17469 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) WIP blocked-by-other-PR t-category-theory large-import merge-conflict t-algebraic-geometry 740/10 Mathlib.lean,Mathlib/Algebra/Category/ModuleCat/Differentials/Presheaf.lean,Mathlib/Algebra/Category/ModuleCat/Differentials/Sheaf.lean,Mathlib/Algebra/Category/ModuleCat/Presheaf/Limits.lean,Mathlib/Algebra/Category/ModuleCat/Presheaf/Pullback.lean,Mathlib/Algebra/Category/Ring/Constructions.lean,Mathlib/Algebra/Ring/Hom/Defs.lean,Mathlib/AlgebraicGeometry/Modules/Differentials.lean,Mathlib/Geometry/RingedSpace/SheafedSpace.lean 9 2 ['github-actions', 'mathlib4-dependent-issues-bot'] nobody
184-23658
6 months ago
unknown
0-0
0 seconds
18626 hannahfechtner
author:hannahfechtner
 feat: define Artin braid groups Define the Artin braid group on infinitely many strands. Includes a toGroup function which defines a function out of the braid group to any other group (given a function which satisfies the braid relations) (more to come in this file; next up: Artin braid groups on finitely many strands) --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict awaiting-author t-algebra new-contributor
label:t-algebra$
 91/0 Mathlib.lean,Mathlib/GroupTheory/SpecificGroups/BraidGroup/Basic.lean 2 22 ['github-actions', 'hannahfechtner', 'jcommelin', 'joelriou'] nobody
184-23652
6 months ago
547-30531
547 days ago
15-38478
15 days
18784 erdOne
author:erdOne
 feat(AlgebraicGeometry): use `addMorphismPropertyInstances` --- - [ ] depends on: #18785 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-algebraic-geometry blocked-by-other-PR 435/91 Mathlib.lean,Mathlib/AlgebraicGeometry/Cover/Open.lean,Mathlib/AlgebraicGeometry/Morphisms/Affine.lean,Mathlib/AlgebraicGeometry/Morphisms/ClosedImmersion.lean,Mathlib/AlgebraicGeometry/Morphisms/FinitePresentation.lean,Mathlib/AlgebraicGeometry/Morphisms/FiniteType.lean,Mathlib/AlgebraicGeometry/Morphisms/OpenImmersion.lean,Mathlib/AlgebraicGeometry/Morphisms/Proper.lean,Mathlib/AlgebraicGeometry/Morphisms/QuasiCompact.lean,Mathlib/AlgebraicGeometry/Morphisms/QuasiSeparated.lean,Mathlib/AlgebraicGeometry/Morphisms/RingHomProperties.lean,Mathlib/AlgebraicGeometry/Morphisms/Smooth.lean,Mathlib/AlgebraicGeometry/Morphisms/UniversallyClosed.lean,Mathlib/AlgebraicGeometry/Restrict.lean,Mathlib/CategoryTheory/MorphismProperty/Composition.lean,Mathlib/CategoryTheory/MorphismProperty/Limits.lean,Mathlib/CategoryTheory/MorphismProperty/Tactic.lean,MathlibTest/AddMorphismPropertyInstances.lean 18 2 ['github-actions', 'mathlib4-dependent-issues-bot'] nobody
184-23643
6 months ago
559-46848
559 days ago
0-1869
31 minutes
19062 hannahfechtner
author:hannahfechtner
 feat(Algebra/PresentedMonoid/Basic): facts about rel Add in a number of useful theorems (reflexivity, closure under multiplication) and lemmas about when the PresentedMonoid.rel holds as an API for users --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) awaiting-author t-algebra
label:t-algebra$
 38/0 Mathlib/GroupTheory/Congruence/Defs.lean 1 8 ['github-actions', 'hannahfechtner', 'kbuzzard', 'riccardobrasca'] nobody
184-23638
6 months ago
451-34598
451 days ago
87-64575
87 days
19607 madvorak
author:madvorak
 feat: block matrices are totally unimodular --- Discussion: https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/TU.20block.20matrix.20.2319607 - [ ] depends on: #19323 - [ ] depends on: #20428 - [ ] depends on: #20433 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict WIP blocked-by-other-PR 156/0 Mathlib.lean,Mathlib/Data/Sum/Decompose.lean,Mathlib/LinearAlgebra/Matrix/Determinant/TotallyUnimodular.lean 3 11 ['github-actions', 'jcommelin', 'leanprover-community-bot-assistant', 'madvorak', 'mathlib4-dependent-issues-bot'] nobody
184-23628
6 months ago
unknown
0-0
0 seconds
20029 FrederickPu
author:FrederickPu
 feat(Tactic/simps): allow for Config attributes to be set directly Allow for Config attributes to be set directly when using initialize_simp_projection as per issue #19895 Basically modified initialize_simp_projection so that the user has the option of specifying a tuple of config option values. Ex: ``` initialize_simp_projection MulEquiv (toFun → apply, invFun → symm_apply) (fullyApplied := false) ``` These config options are then converted into projections.  --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict WIP new-contributor t-meta 34/4 Mathlib/Tactic/Simps/Basic.lean 1 11 ['FrederickPu', 'YaelDillies', 'fpvandoorn', 'github-actions', 'leanprover-community-bot-assistant'] nobody
184-23589
6 months ago
520-40838
520 days ago
0-34081
9 hours
21269 658060
author:658060
 feat(CategoryTheory/Topos): basic definitions and results in topos theory This code contains basic definitions and results in topos theory, including the definition of a subobject classifier, power objects, and topoi. It is proved that every topos has exponential objects, i.e. "internal homs". The mathematical content follows chapter IV sections 1-2 of Mac Lane and Moerdijk's text "Sheaves in Geometry and Logic". --- - [x] depends on: #21281 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) WIP t-category-theory new-contributor merge-conflict awaiting-author 1269/0 Mathlib.lean,Mathlib/CategoryTheory/Topos/Basic.lean,Mathlib/CategoryTheory/Topos/Classifier.lean,Mathlib/CategoryTheory/Topos/Exponentials.lean,Mathlib/CategoryTheory/Topos/Power.lean 5 10 ['658060', 'gio256', 'github-actions', 'joelriou', 'mathlib4-dependent-issues-bot'] nobody
184-23562
6 months ago
477-2376
477 days ago
0-13879
3 hours
22805 ScottCarnahan
author:ScottCarnahan
 feat(FieldTheory/Finite): fixed points of Frobenius automorphism This PR identifies the prime field with the fixed points of frobenius. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict WIP t-algebra
label:t-algebra$
 325/7 Mathlib/Algebra/Algebra/ZMod.lean,Mathlib/Algebra/Field/Subfield/Basic.lean,Mathlib/FieldTheory/Finite/Basic.lean,Mathlib/FieldTheory/Finite/GaloisField.lean 4 1 ['github-actions'] nobody
184-23550
6 months ago
unknown
0-0
0 seconds
23772 SEU-Prime
author:SEU-Prime
 feat: Amice equivalence i built amice equiv [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) WIP t-number-theory 283/0 Mathlib/NumberTheory/Padics/Amice.lean 1 2 ['grunweg'] nobody
184-23531
6 months ago
410-32782
410 days ago
0-4483
1 hour
23990 robertmaxton42
author:robertmaxton42
 feat(Types.Colimits): Quot is functorial and colimitEquivQuot is natural Add `Functor.quotFunctor` to parallel `Functor.sectionsFunctor`, witnessing that `Quot` is functorial; add `colimNatIsoQuotFunctor` to parallel `limNatIsoSectionsFunctor`, witnessing that `colimitEquivQuot` is natural in the diagram $F$. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict awaiting-author t-category-theory new-contributor 33/0 Mathlib/CategoryTheory/Limits/Types/Colimits.lean 1 5 ['github-actions', 'joelriou', 'leanprover-community-bot-assistant', 'robertmaxton42'] nobody
184-23445
6 months ago
396-22380
396 days ago
8-27136
8 days
24533 robertmaxton42
author:robertmaxton42
 feat(ULift): conjugation by ULift.up/down, misc cast/heq lemmas * Adds the convenience def `ULift.conj x := `down (f (up x))`, and corresponding basic lemmas * Adds lemmas showing that `ULift.up` and `.down` commute with casts and preserve `HEq`. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) awaiting-author t-data 31/0 Mathlib/Data/ULift.lean 1 23 ['eric-wieser', 'github-actions', 'grunweg', 'robertmaxton42'] nobody
184-23441
6 months ago
267-51229
267 days ago
118-2181
118 days
24690 ScottCarnahan
author:ScottCarnahan
 feat(Data.Prod): reverse lexicographic order This PR implements the type synonym RevLex as a one-field structure, defines an order on products, and proves an order isomorphism with the Lex product with factors switched. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict WIP t-order 141/0 Mathlib.lean,Mathlib/Data/Prod/RevLex.lean 2 5 ['ScottCarnahan', 'YaelDillies', 'github-actions', 'mathlib4-merge-conflict-bot'] nobody
184-23431
6 months ago
359-68956
359 days ago
19-33859
19 days
24692 ScottCarnahan
author:ScottCarnahan
 feat(RingTheory/HahnSeries/Basic): isomorphism of Hahn series induced by order isomorphism This PR introduces an isomorphism of Hahn series induced by an order isomorphism on the exponent posets. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict WIP t-order 35/0 Mathlib/RingTheory/HahnSeries/Basic.lean 1 2 ['github-actions', 'mathlib4-merge-conflict-bot'] nobody
184-23425
6 months ago
347-53880
347 days ago
31-47622
31 days
25034 ScottCarnahan
author:ScottCarnahan
 feat(Algebra/Module/Equiv/Basic): Restriction of scalars from a semilinear equivalence to a linear equivalence If `M` and `M₂` are both `R`-modules and modules for `S` and `S₂`, respectively, then for any ring isomorphism `e` between `S` and `S₂` and any `e`-semilinear equivalence between `M` and `M₂` that respects the `R`-action, we obtain an `R`-linear equivalence between `M` and `M₂`. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) WIP t-algebra
label:t-algebra$
 28/0 Mathlib/Algebra/Module/Equiv/Basic.lean 1 1 ['github-actions'] nobody
184-23418
6 months ago
347-53842
347 days ago
20-11468
20 days
25831 ScottCarnahan
author:ScottCarnahan
 feat(RingTheory/HahnSeries): Powers of a binomial This PR introduces powers of a binomial `single g 1 - single g' 1` in a Hahn series, where the powers take values in a binomial ring. These series behave as one would expect with respect to addition of powers, and comparison with natural number powers. They are often used in the theory of vertex algebras. --- - [x] depends on: #25830 - [x] depends on: #27497 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) --- *This PR continues the work from #24102.* *Original PR: https://github.com/leanprover-community/mathlib4/pull/24102* merge-conflict WIP t-ring-theory 132/0 Mathlib.lean,Mathlib/RingTheory/HahnSeries/Addition.lean,Mathlib/RingTheory/HahnSeries/Binomial.lean,Mathlib/RingTheory/HahnSeries/HEval.lean,Mathlib/RingTheory/HahnSeries/Multiplication.lean 5 14 ['ScottCarnahan', 'github-actions', 'kbuzzard', 'leanprover-community-bot-assistant', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] kbuzzard
assignee:kbuzzard
184-23390
6 months ago
200-40842
200 days ago
80-45817
80 days
26455 ScottCarnahan
author:ScottCarnahan
 feat(LinearAlgebra/RootSystem): API for CartanMatrix Some attempts at working out good ways to eliminate bad Cartan matrices. Very much WIP --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict WIP t-algebra
label:t-algebra$
 815/26 Mathlib/Algebra/Group/Action/Faithful.lean,Mathlib/LinearAlgebra/LinearIndependent/Basic.lean,Mathlib/LinearAlgebra/RootSystem/Base.lean,Mathlib/LinearAlgebra/RootSystem/CartanMatrix.lean,Mathlib/LinearAlgebra/RootSystem/Finite/CanonicalBilinear.lean,Mathlib/LinearAlgebra/RootSystem/Finite/Lemmas.lean,Mathlib/LinearAlgebra/RootSystem/GeckConstruction/Relations.lean,Mathlib/LinearAlgebra/RootSystem/IsValuedIn.lean,Mathlib/LinearAlgebra/RootSystem/RootPositive.lean 9 8 ['github-actions', 'leanprover-community-bot-assistant', 'mathlib4-merge-conflict-bot'] nobody
184-23264
6 months ago
329-79334
329 days ago
0-17731
4 hours
26804 kckennylau
author:kckennylau
 feat(SetTheory): ZFSet is a model of ZFC --- Depends on: * [ ] #26644 `Mathlib/SetTheory/ZFC/Model.lean` is the main file, and it starts at Line 346. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict WIP t-set-theory 1245/0 Mathlib.lean,Mathlib/SetTheory/ZFC/Axioms.lean,Mathlib/SetTheory/ZFC/Model.lean,docs/references.bib 4 2 ['github-actions', 'leanprover-community-bot-assistant'] nobody
184-23217
6 months ago
320-74342
320 days ago
0-163
2 minutes
26890 robin-carlier
author:robin-carlier
 feat(CategoryTheory/Monoidal/DayConvolution): more API for `DayFunctor` We provide some lemmas that helps characterizing the monoidal structure on `DayFunctor`, they are special cases of the lemmas for `LawfulDayConvolutionMonoidalCategoryStruct`. --- - [x] depends on: #26824 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-category-theory 1372/19 Mathlib.lean,Mathlib/CategoryTheory/Functor/KanExtension/Basic.lean,Mathlib/CategoryTheory/Monoidal/DayConvolution.lean,Mathlib/CategoryTheory/Monoidal/DayConvolution/DayFunctor.lean 4 5 ['github-actions', 'leanprover-community-bot-assistant', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
184-23205
6 months ago
318-48214
318 days ago
0-517
8 minutes
26310 kckennylau
author:kckennylau
 feat: binary forms This PR provides the basic definition of binary forms, which are homogeneous polynomials in two variables. --- - [ ] depends on: #26312 - [ ] depends on: #26313 - [ ] depends on: #26314 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict awaiting-author t-algebra
label:t-algebra$
 73/0 Mathlib.lean,Mathlib/RingTheory/MvPolynomial/BinaryForm.lean 2 14 ['MichaelStollBayreuth', 'github-actions', 'kckennylau', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot', 'ocfnash'] ocfnash
assignee:ocfnash
184-23183
6 months ago
276-20204
276 days ago
57-1096
57 days
26283 kckennylau
author:kckennylau
 feat: resultant of polynomials --- This is a WIP PR for resultant for me to get cache. PRs produced: * [x] #25139 (migrated to #26091) * [x] #25270 * [x] #25279 * [x] #25293 * [x] #25294 * [x] #25305 * [x] #26285 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict WIP t-algebra
label:t-algebra$
 1190/0 Mathlib.lean,Mathlib/Algebra/Polynomial/Resultant/Basic.lean,Mathlib/Algebra/Polynomial/Resultant/MvPolynomial.lean,Mathlib/RingTheory/Polynomial/Discriminant.lean 4 2 ['github-actions', 'mathlib4-merge-conflict-bot'] nobody
184-23159
6 months ago
333-78273
333 days ago
0-19
19 seconds
27991 sinianluoye
author:sinianluoye
 feat(Rat): add Rat.den_eq_of_add_den_eq_one and its dependent lemmas ```lean4 example {q r : ℚ} (h : (q + r).den = 1) : q.den = r.den := by ``` It is so simple, but I couldn't find it in current mathlib repo. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) awaiting-author t-data new-contributor 22/0 Mathlib/Data/Rat/Lemmas.lean 1 33 ['github-actions', 'kim-em', 'mathlib-bors', 'pechersky', 'sinianluoye', 'themathqueen'] pechersky
assignee:pechersky
184-23128
6 months ago
215-46722
215 days ago
74-56654
74 days
28215 5hv5hvnk
author:5hv5hvnk
 feat: strong and Weak connectivity for Digraphs strong and weak connectivity in Digraphs --- Should resolve a part of issue #26771 Main additions in the PR: 1. Walks in Digraphs (Walk.lean) - Basic walk structure with start and end vertices - Support for walk operations: append, reverse, length - Support functions: getVert, copy, support 2. Walk Decompositions (WalkDecomp.lean) - takeUntil and dropUntil functions to split walks - rotate operation for loop walks - Theorems relating to walk decomposition properties 3. Subgraphs (subgraph.lean) - Subgraph structure for digraphs - Induced and spanning subgraph predicates - Lattice structure (sup, inf, top, bot) - Coercion to standalone digraphs 4. Paths (Paths.lean) - Trail, Path, Circuit, Cycle definitions - Path structure with no repeating vertices - Theorems relating different path types - Basic connectivity definitions (reachable, weakly/strongly connected) 5. Connectivity (Connected.lean) - Reachability relations and properties - Strong and weak connectivity definitions - Connected component types: - StronglyConnectedComponent - WeaklyConnectedComponent - ConnectedComponent - Component properties and equivalence relations --> [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) WIP new-contributor merge-conflict awaiting-author t-combinatorics 1266/0 Mathlib.lean,Mathlib/Combinatorics/Digraph/Connected.lean,Mathlib/Combinatorics/Digraph/Paths.lean,Mathlib/Combinatorics/Digraph/Subgraph.lean,Mathlib/Combinatorics/Digraph/Walk.lean,Mathlib/Combinatorics/Digraph/WalkDecomp.lean 6 4 ['github-actions', 'grunweg', 'mathlib4-merge-conflict-bot'] nobody
184-23107
6 months ago
272-20689
272 days ago
12-41939
12 days
28970 Whysoserioushah
author:Whysoserioushah
 feat(Algebra/Algebra/ReducedNorm): defines reduced norm and trace TODO : 1. add the theorem proving reduced charpoly is independent from the choice of AlgEquiv (blocked by this [discussion](https://leanprover.zulipchat.com/#narrow/channel/217875-Is-there-code-for-X.3F/topic/Algebra.2ETensorProduct.2Eassoc/with/536349758)) 2. prove reduced charpoly is "actually" in the polynomial ring of base field (blocked by this [discussion](https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/.E2.9C.94.20Refactor.20Subfield)) therefore content about this topic is basically the best I could do for now :-( --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict awaiting-author t-algebra
label:t-algebra$
 66/0 Mathlib.lean,Mathlib/Algebra/Algebra/ReducedNorm.lean 2 19 ['Whysoserioushah', 'chrisflav', 'erdOne', 'eric-wieser', 'github-actions', 'kbuzzard', 'mathlib4-merge-conflict-bot'] chrisflav
assignee:chrisflav
184-23055
6 months ago
228-14578
228 days ago
40-66926
40 days
29212 Whysoserioushah
author:Whysoserioushah
 feat(Algebra/CrossProductAlgebra/Defs): define Cross Product Algebra PS: All to-dos listed in the file has been fully sorry-freed and will be (slowly) upstreamed by either me or Yaël Co-authored-by: Yaël Dillies Co-authored-by: Jujian Zhang --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict awaiting-author t-algebra
label:t-algebra$
 270/0 Mathlib.lean,Mathlib/RepresentationTheory/CrossProductAlgebra/Defs.lean,docs/references.bib 3 9 ['Whysoserioushah', 'YaelDillies', 'eric-wieser', 'github-actions', 'mathlib4-merge-conflict-bot'] nobody
184-23044
6 months ago
257-50229
257 days ago
5-62087
5 days
29514 grunweg
author:grunweg
 feat(CI): use more strict mode --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict WIP CI 192/33 .github/build.in.yml,.github/workflows/bors.yml,.github/workflows/build.yml,.github/workflows/build_fork.yml,Mathlib.lean,Mathlib/Tactic.lean,Mathlib/Tactic/Linter/ValidatePRTitle.lean,lakefile.lean,scripts/README.md,scripts/check_title_labels.lean 10 2 ['github-actions', 'mathlib4-merge-conflict-bot'] nobody
184-23003
6 months ago
254-12578
254 days ago
0-1
1 second
29574 JarodAlper
author:JarodAlper
 feat: regular local rings are domains We have added three new files in Mathlib/RingTheory/LocalRing * EmbeddingDimension.lean * LocalRingDimension.lean * RegularLocalRings.lean We have added two lemmas and an instance in Mathlib/RingTheory/LocalRing/RingHom/Basic.lean This work was done by Jarod Alper and Brian Nugent. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-ring-theory new-contributor 910/3 Mathlib.lean,Mathlib/RingTheory/LocalRing/EmbeddingDimension.lean,Mathlib/RingTheory/LocalRing/LocalRingDimension.lean,Mathlib/RingTheory/LocalRing/RegularLocalRings.lean,Mathlib/RingTheory/LocalRing/RingHom/Basic.lean,lake-manifest.json 6 2 ['github-actions', 'mathlib4-merge-conflict-bot'] nobody
184-22996
6 months ago
251-24251
251 days ago
1-50449
1 day
28718 imbrem
author:imbrem
 feat: class for chosen finite coproducts Added basic `ChosenFiniteCoproducts` class, and started porting some of the lemmas about `ChosenFiniteProducts` suitably translated --- This, combined with #20182 modified to use chosen finite coproducts and premonoidal categories (#21488), should be enough for me to formalize strong Elgot categories, and hence a lot of categorical iteration theory for my PhD thesis. Re-done from #21603 to deal with changes in #24399 and #24390 Eventually, if we really want to harmonize approaches, we could introduce an `AddMonoidalCategory` struct and do the analogous to #24399 and #24390 for additive monoidal structure, but that seems like a massive overcomplication for now. It would allow formalizing fun things like rig categories, though. - [ ] depends on: #30150 blocked-by-other-PR t-category-theory new-contributor merge-conflict awaiting-author 290/0 Mathlib.lean,Mathlib/CategoryTheory/ChosenFiniteCoproducts.lean 2 9 ['YaelDillies', 'github-actions', 'imbrem', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot', 'robin-carlier'] nobody
184-22908
6 months ago
274-59462
274 days ago
0-24930
6 hours
30366 sinhp
author:sinhp
 feat(CategoryTheory): The Preliminaries for Locally Cartesian Closed Categories See https://github.com/leanprover-community/mathlib4/pull/21525 This PR defines the basic preliminaries for defining locally cartesian closed categories (LCCCs). First, we develop a computable implementation of pullbacks, by introducing a new type-class `ChosenPullback`. The non-computable `HasPullbacksAlong` and `HasPullbacks` predicates yield instances of `ChosenPullback` using global choice, but interestingly in the category of types every morphism has chosen pullbacks. Also, cartesian monoidal categories, morphisms to the terminal object and the product projections have chosen pullbacks. We prove that `ChosenPullback` has good closure properties, e.g., isos have chosen pullbacks, and composition of morphisms with chosen pullbacks have chosen pullbacks. Separately, we prove that pull-push along a morphism with chosen pullbacks gives the (cartesian) binary product of that morphism, seen as an object of a slice category, and any other object of the same slice category. In fact, we also prove the stronger statement, namely that the pull-push composition `(Over.ChosenPullback.pullback Z.hom) ⋙ (Over.map Z.hom)` is naturally isomorphic to the right tensor product functor `_ × Y` in `Over X`. _This is going to be crucial in our mate-based approach to LCCCs_. Also, using the calculus of mates we define certain natural isomorphisms involving `Over.star` and `Over.pullback` which will be used in defining the right adjoint to the pullback functor in the development of LCCCs. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict awaiting-author t-category-theory 4865/526 .github/build.in.yml,.github/workflows/bors.yml,.github/workflows/build.yml,.github/workflows/build_fork.yml,Mathlib.lean,Mathlib/Algebra/Algebra/Spectrum/Quasispectrum.lean,Mathlib/Algebra/BigOperators/Group/List/Defs.lean,Mathlib/Algebra/BrauerGroup/Defs.lean,Mathlib/Algebra/Category/Grp/Subobject.lean,Mathlib/Algebra/Category/ModuleCat/Basic.lean,Mathlib/Algebra/Category/ModuleCat/Monoidal/Basic.lean,Mathlib/Algebra/Category/ModuleCat/Monoidal/Symmetric.lean,Mathlib/Algebra/Category/ModuleCat/Semi.lean,Mathlib/Algebra/CharP/Frobenius.lean,Mathlib/Algebra/Colimit/Ring.lean,Mathlib/Algebra/Field/MinimalAxioms.lean,Mathlib/Algebra/GroupWithZero/Hom.lean,Mathlib/Algebra/Homology/ComplexShapeSigns.lean,Mathlib/Algebra/Homology/DerivedCategory/Ext/Basic.lean,Mathlib/Algebra/Homology/DerivedCategory/Ext/Linear.lean,Mathlib/Algebra/Homology/DerivedCategory/Linear.lean,Mathlib/Algebra/Homology/HomologySequenceLemmas.lean,Mathlib/Algebra/Homology/HomotopyCategory/HomologicalFunctor.lean,Mathlib/Algebra/Homology/HomotopyCategory/ShiftSequence.lean,Mathlib/Algebra/Lie/CartanExists.lean,Mathlib/AlgebraicGeometry/Modules/Presheaf.lean,Mathlib/AlgebraicTopology/SimplexCategory/Defs.lean,Mathlib/AlgebraicTopology/SimplicialSet/AnodyneExtensions/IsUniquelyCodimOneFace.lean,Mathlib/AlgebraicTopology/SimplicialSet/AnodyneExtensions/Pairing.lean,Mathlib/AlgebraicTopology/SimplicialSet/Monoidal.lean,Mathlib/AlgebraicTopology/SimplicialSet/Nerve.lean,Mathlib/AlgebraicTopology/SimplicialSet/NerveAdjunction.lean,Mathlib/AlgebraicTopology/SimplicialSet/NonDegenerateSimplicesSubcomplex.lean,Mathlib/AlgebraicTopology/SimplicialSet/StdSimplex.lean,Mathlib/Analysis/Analytic/ChangeOrigin.lean,Mathlib/Analysis/Calculus/FDeriv/Prod.lean,Mathlib/Analysis/Calculus/IteratedDeriv/ConvergenceOnBall.lean,Mathlib/Analysis/Complex/OperatorNorm.lean,Mathlib/Analysis/Distribution/ContDiffMapSupportedIn.lean,Mathlib/Analysis/Distribution/SchwartzSpace.lean,Mathlib/Analysis/Distribution/TemperateGrowth.lean,Mathlib/Analysis/Meromorphic/TrailingCoefficient.lean,Mathlib/Analysis/Normed/Ring/WithAbs.lean,Mathlib/Analysis/SpecialFunctions/Log/PosLog.lean,Mathlib/CategoryTheory/Abelian/GrothendieckAxioms/Basic.lean,Mathlib/CategoryTheory/Abelian/GrothendieckAxioms/Sheaf.lean,Mathlib/CategoryTheory/Adjunction/AdjointFunctorTheorems.lean,Mathlib/CategoryTheory/Adjunction/Basic.lean,Mathlib/CategoryTheory/Adjunction/CompositionIso.lean,Mathlib/CategoryTheory/Adjunction/Mates.lean,Mathlib/CategoryTheory/Bicategory/Strict/Pseudofunctor.lean,Mathlib/CategoryTheory/Category/ULift.lean,Mathlib/CategoryTheory/Closed/Cartesian.lean,Mathlib/CategoryTheory/Comma/StructuredArrow/Small.lean,Mathlib/CategoryTheory/ComposableArrows.lean,Mathlib/CategoryTheory/Discrete/StructuredArrow.lean,Mathlib/CategoryTheory/EssentiallySmall.lean,Mathlib/CategoryTheory/Filtered/Final.lean,Mathlib/CategoryTheory/Functor/KanExtension/Pointwise.lean,Mathlib/CategoryTheory/Generator/Abelian.lean,Mathlib/CategoryTheory/Generator/Basic.lean,Mathlib/CategoryTheory/Generator/StrongGenerator.lean,Mathlib/CategoryTheory/GuitartExact/KanExtension.lean,Mathlib/CategoryTheory/IsConnected.lean,Mathlib/CategoryTheory/Limits/Filtered.lean,Mathlib/CategoryTheory/Limits/Final.lean,Mathlib/CategoryTheory/Limits/Final/Connected.lean,Mathlib/CategoryTheory/Limits/Final/Type.lean,Mathlib/CategoryTheory/Limits/HasLimits.lean,Mathlib/CategoryTheory/Limits/Preserves/Basic.lean,Mathlib/CategoryTheory/Limits/Preserves/Filtered.lean,Mathlib/CategoryTheory/Limits/Shapes/BinaryProducts.lean,Mathlib/CategoryTheory/Limits/Types/ColimitType.lean,Mathlib/CategoryTheory/LocallyCartesianClosed/Prelim.lean,Mathlib/CategoryTheory/Monoidal/Cartesian/Basic.lean,Mathlib/CategoryTheory/ObjectProperty/ClosedUnderIsomorphisms.lean,Mathlib/CategoryTheory/ObjectProperty/CompleteLattice.lean,Mathlib/CategoryTheory/ObjectProperty/LimitsClosure.lean,Mathlib/CategoryTheory/ObjectProperty/LimitsOfShape.lean,Mathlib/CategoryTheory/ObjectProperty/Small.lean,Mathlib/CategoryTheory/Presentable/IsCardinalFiltered.lean,Mathlib/CategoryTheory/Shift/ShiftedHom.lean,Mathlib/CategoryTheory/Sites/Descent/IsPrestack.lean,Mathlib/CategoryTheory/Sites/Equivalence.lean,Mathlib/CategoryTheory/Sites/LeftExact.lean,Mathlib/CategoryTheory/Sites/PreservesSheafification.lean,Mathlib/CategoryTheory/Sites/Whiskering.lean,Mathlib/Combinatorics/Enumerative/Bell.lean,Mathlib/Condensed/Discrete/Basic.lean,Mathlib/Condensed/Light/AB.lean,Mathlib/Condensed/Light/CartesianClosed.lean,Mathlib/Condensed/Light/Instances.lean,Mathlib/Condensed/Light/Module.lean,Mathlib/Data/Rel/Separated.lean,Mathlib/FieldTheory/PerfectClosure.lean,Mathlib/Geometry/Manifold/IsManifold/ExtChartAt.lean,Mathlib/Geometry/Manifold/MFDeriv/SpecificFunctions.lean,Mathlib/GroupTheory/ArchimedeanDensely.lean,Mathlib/GroupTheory/OrderOfElement.lean,Mathlib/GroupTheory/SpecificGroups/Cyclic.lean 131 40 ['github-actions', 'joelriou', 'mathlib4-merge-conflict-bot', 'sinhp'] nobody
184-22882
6 months ago
206-5046
206 days ago
3-54729
3 days
26765 KiringYJ
author:KiringYJ
 feat(MeasureTheory/PiSystem): add π-λ theorem and SetLike instance Add two small features to `MeasureTheory/PiSystem`: 1. SetLike instance `instance : SetLike (DynkinSystem α) (Set α)` This lets us write `s ⊆ d` and `t ∈ d` for a DynkinSystem `d`, matching usual mathlib style. 2. `DynkinSystem.pi_lambda` lemma Classical π‑λ theorem: if a π‑system `s` is contained in a Dynkin system `d`, every set measurable for `σ(s)` is also in `d`. Currently, mathlib exposes this result only indirectly (e.g. via `generateFrom_eq`). Although logically equivalent, it is not obvious at first glance that those lemmas are the π‑λ theorem. The new lemma states the result in its familiar textbook form, so users can recognise and cite it immediately. Both pieces are under 10 lines, term‑mode only, and do not modify existing APIs. No breaking changes. No dependencies. awaiting-author t-measure-probability new-contributor 13/0 Mathlib/MeasureTheory/PiSystem.lean 1 14 ['EtienneC30', 'KiringYJ', 'dagurtomas', 'github-actions', 'ocfnash'] RemyDegenne
assignee:RemyDegenne
184-9304
6 months ago
184-9304
184 days ago
138-3922
138 days
29409 Julian
author:Julian
 feat(Mathlib/Analysis): deriv_eq_self and deriv_exp_iff --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) awaiting-author t-analysis 29/0 Mathlib/Analysis/SpecialFunctions/ExpDeriv.lean 1 9 ['Julian', 'Paul-Lez', 'eric-wieser', 'github-actions', 'j-loreaux', 'mathlib4-merge-conflict-bot'] j-loreaux
assignee:j-loreaux
183-23269
6 months ago
241-14676
241 days ago
15-76317
15 days
27306 xyzw12345
author:xyzw12345
 feat: `lie_ring` tactic and `LieReduce` command This PR continues the work from #22196. Original PR: https://github.com/leanprover-community/mathlib4/pull/22196 t-meta merge-conflict 789/2 Mathlib.lean,Mathlib/Algebra/Lie/Derivation/AdjointAction.lean,Mathlib/Tactic.lean,Mathlib/Tactic/LieAlgebra/Basic.lean,Mathlib/Tactic/LieAlgebra/LieRingNF.lean,Mathlib/Util/AtomM.lean,MathlibTest/lie_ring.lean,scripts/noshake.json 8 34 ['FLDutchmann', 'JovanGerb', 'github-actions', 'grunweg', 'mathlib-merge-conflicts', 'mathlib4-merge-conflict-bot', 'xyzw12345'] JovanGerb
assignee:JovanGerb
182-38981
6 months ago
186-35720
186 days ago
114-72392
114 days
27694 grunweg
author:grunweg
 feat: Gram-Schmidt orthonormalisation preserves continuity of sections provided the bundle metric used in the process is continuous. From the path towards geodesics and the Levi-Civita connection. Co-authored-by: Patrick Massot [patrickmassot@free.fr](mailto:patrickmassot@free.fr) --- - [ ] depends on: #27024 - [x] depends on: #27021 Baby version of #27025. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-differential-geometry blocked-by-other-PR 390/11 Mathlib.lean,Mathlib/Analysis/InnerProductSpace/GramSchmidtOrtho.lean,Mathlib/Geometry/Manifold/VectorBundle/GramSchmidtOrtho.lean,scripts/noshake.json 4 3 ['github-actions', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
182-1993
6 months ago
296-14354
296 days ago
0-696
11 minutes
27025 grunweg
author:grunweg
 feat: Gram-Schmidt procedure on smooth vector bundles yields smooth sections For the Gram-Schmidt process on a vector bundle, deduce that smoothness of the bundle metric implies smoothness of the resulting sections. From the path towards geodesics and the Levi-Civita connection. Co-authored-by: Patrick Massot --- A few sorries remain to prove the continuous case. - [x] depends on: #27021 - [x] depends on: #27023 - [ ] depends on: #27024 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-differential-geometry blocked-by-other-PR 927/11 Mathlib.lean,Mathlib/Analysis/InnerProductSpace/GramSchmidtOrtho.lean,Mathlib/Geometry/Manifold/Elaborators.lean,Mathlib/Geometry/Manifold/Traces.lean,Mathlib/Geometry/Manifold/VectorBundle/GramSchmidtOrtho.lean,scripts/noshake.json 6 6 ['faenuccio', 'github-actions', 'grunweg', 'leanprover-community-bot-assistant', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
182-1989
6 months ago
314-46063
314 days ago
0-218
3 minutes
30637 strihanje01
author:strihanje01
 feat(Combinatorics/SetFamily/Lindstrom): Lindstrom's theorem for subfamilies with equal unions add Lindstrom's theorem and its strengthening for equal intersections --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-combinatorics new-contributor 209/0 Mathlib/Combinatorics/SetFamily/Lindstrom.lean 1 2 ['github-actions', 'mathlib4-merge-conflict-bot'] b-mehta
assignee:b-mehta
181-31453
6 months ago
184-49612
184 days ago
31-61152
31 days
31949 ADedecker
author:ADedecker
 chore: prefer `Pi.single i 1 j` over `fun j => if i = j then 1 else 0` --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra awaiting-author
label:t-algebra$
 23/21 Mathlib/Algebra/BigOperators/Pi.lean,Mathlib/Analysis/Convex/StdSimplex.lean,Mathlib/LinearAlgebra/Matrix/Adjugate.lean,Mathlib/LinearAlgebra/Pi.lean,Mathlib/Topology/Algebra/Module/Basic.lean 5 5 ['eric-wieser', 'github-actions', 'themathqueen'] nobody
180-84202
5 months ago
180-84202
180 days ago
0-21800
6 hours
25902 pfaffelh
author:pfaffelh
 feat: The finite product of semi-rings (in terms of measure theory) is a semi-ring. ~~Move results for rings (in terms of measure theory) to a separate file; was in Semiring.lean before.~~ For `∀ i ∈ s, IsSetSemiring (C i))`, the product `s.pi '' s.pi C` is a semiring. Prove two auxiliary lemmas in `Data.Set.Prod` needed on the way. --- *This PR continues the work from #22714.* *Original PR: https://github.com/leanprover-community/mathlib4/pull/22714* t-measure-probability brownian large-import merge-conflict awaiting-author 260/14 Mathlib/Data/Set/Pairwise/Lattice.lean,Mathlib/Data/Set/Prod.lean,Mathlib/MeasureTheory/MeasurableSpace/Pi.lean,Mathlib/MeasureTheory/PiSystem.lean,Mathlib/MeasureTheory/SetSemiring.lean 5 7 ['github-actions', 'mathlib4-merge-conflict-bot', 'sgouezel'] kex-y
assignee:kex-y
180-28448
5 months ago
245-37248
245 days ago
29-55524
29 days
31571 erdOne
author:erdOne
 feat(RingTheory): existence of local algebra with given residue field --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) awaiting-author t-ring-theory 225/0 Mathlib.lean,Mathlib/RingTheory/LocalRing/SeparableResidueField.lean 2 7 ['chrisflav', 'github-actions', 'jcommelin', 'mathlib4-merge-conflict-bot'] chrisflav
assignee:chrisflav
180-3237
5 months ago
180-6694
180 days ago
9-73312
9 days
29517 pechersky
author:pechersky
 feat(RingTheory/Torsion): torsion = union of roots of unity with additional API for Associates and rootsOfUnity sups --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) - [x] depends on: #29988 - [x] depends on: #29989 - [x] depends on: #29990 - [x] depends on: #29991 merge-conflict awaiting-author t-algebra
label:t-algebra$
 149/8 Mathlib.lean,Mathlib/Algebra/Group/Subgroup/Lattice.lean,Mathlib/RingTheory/RootsOfUnity/Basic.lean,Mathlib/RingTheory/RootsOfUnity/PrimitiveRoots.lean,Mathlib/RingTheory/Torsion.lean 5 35 ['chrisflav', 'github-actions', 'kckennylau', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot', 'pechersky'] chrisflav
assignee:chrisflav
179-82461
5 months ago
200-3864
200 days ago
37-73610
37 days
24627 pechersky
author:pechersky
 feat(Topology/Algebra/Valued): `IsLinearTopology 𝒪[K] K` and `𝒪[K] 𝒪[K]` as well as `IsLinearTopology ℤ_[p] ℤ_[p]` --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) - [x] depends on: #26829 merge-conflict awaiting-author t-topology 219/26 Mathlib.lean,Mathlib/NumberTheory/Padics/LinearTopology.lean,Mathlib/Topology/Algebra/Valued/LinearTopology.lean,Mathlib/Topology/Algebra/Valued/ValuationTopology.lean,Mathlib/Topology/Algebra/Valued/ValuedField.lean 5 55 ['ADedecker', 'erdOne', 'faenuccio', 'github-actions', 'jcommelin', 'leanprover-community-bot-assistant', 'loefflerd', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot', 'pechersky'] jcommelin
assignee:jcommelin
179-36183
5 months ago
184-51579
184 days ago
36-378
36 days
31948 ADedecker
author:ADedecker
 feat: move `ContinuousSMul` to a finite extension with the module topology My motivation is the following: to define the topology on test functions (see #31806), we take the inductive limit in the category of *real* locally convex topological vector spaces (we don't want the result to depend on the base field!). But then, we need a way to get that complex-valued test functions are also a *complex* topological vector space, which we will obtain by combining this PR with [isModuleTopologyOfFiniteDimensional](https://leanprover-community.github.io/mathlib4_docs/Mathlib/Topology/Algebra/Module/FiniteDimension.html#isModuleTopologyOfFiniteDimensional). --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict 109/57 Mathlib/Algebra/Algebra/Basic.lean,Mathlib/Algebra/Module/LinearMap/Basic.lean,Mathlib/Analysis/LocallyConvex/WeakDual.lean,Mathlib/FieldTheory/Fixed.lean,Mathlib/LinearAlgebra/LinearIndependent/Lemmas.lean,Mathlib/LinearAlgebra/Pi.lean,Mathlib/Topology/Algebra/Module/Basic.lean,Mathlib/Topology/Algebra/Module/ModuleTopology.lean 8 2 ['github-actions', 'mathlib4-merge-conflict-bot'] nobody
178-80850
5 months ago
unknown
0-0
0 seconds
24016 plp127
author:plp127
 feat: fine uniformity Adds the fine uniformity, and proves some properties. --- - [ ] depends on: #24096 for showing the induced topology is equal on completely regular spaces [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-topology 283/0 Mathlib.lean,Mathlib/Topology/UniformSpace/FineUniformity.lean,Mathlib/Topology/UniformSpace/Uniformizable.lean 3 3 ['github-actions', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
178-69972
5 months ago
400-78722
400 days ago
2-85308
2 days
30995 kckennylau
author:kckennylau
 feat(RingTheory): replace ofLinearEquiv with limit For an `I`-adically complete `M` we define `limit : AdicCompletion I M ≃ₗ[R] M`. This replaces the existing `ofLinearEquiv : M ≃ₗ[R] AdicCompletion I M` which goes in the opposite direction, and should make #30989 and subsequent PR's smoother. It is intended to be used together with [AdicCompletion.mk](https://leanprover-community.github.io/mathlib4_docs/Mathlib/RingTheory/AdicCompletion/Basic.html#AdicCompletion.mk) : `AdicCompletion.AdicCauchySequence I M →ₗ[R] AdicCompletion I M`. We also introduce `adicExpansion (ϖ : R) (hϖ : ϖ ∈ I) : (ℕ → M) →ₗ[R] AdicCauchySequence I M`, which sends a sequence `a : ℕ → M` to the Cauchy sequence `∑ ϖ ^ i • a i`. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-ring-theory awaiting-author 77/49 Mathlib/RingTheory/AdicCompletion/Algebra.lean,Mathlib/RingTheory/AdicCompletion/Basic.lean,Mathlib/RingTheory/AdicCompletion/RingHom.lean 3 8 ['erdOne', 'github-actions', 'jjdishere', 'kckennylau', 'mathlib4-merge-conflict-bot'] erdOne
assignee:erdOne
178-52836
5 months ago
180-81921
180 days ago
13-8190
13 days
32094 grunweg
author:grunweg
 feat(runLinter): allow only running certain linters This adds a script `run_linter`, which is a fork of batteries' `runLinter` with extra features: - rewrite as a CLI app, so --help messages etc. come for free - add a `--list` option, which prints the list of linters it was about to run, and exists - add `--select`, `--ignore` and `--only` options which ensure certain linters are always run, never resp. that only a certain list of linters are run. (`add` takes priority over `exclude` or `only`.) - add an `update_only_remove` flag which only runs linters mentioned in the `nolints` file: this only removes entries (by design), but is often much faster. - renamed to `run_linter`: actually, per the [zulip discussion](https://leanprover.zulipchat.com/#narrow/stream/287929-mathlib4/topic/Naming.20convention/near/450896930), this should be `run-linter` --- and one could as well use the opportunity to rename this to e.g. `env-linter`. Asked [here](https://leanprover.zulipchat.com/#narrow/stream/270676-lean4/topic/Configuring.2Fmodernizing.20runLinter). Intended use cases 1. Run `update_only_remove` when updating the nolints file. In fact, it is so fast that it could even run during regular CI, after the normal `lint` step... 2. Run the mathlib linters locally. The simpNF linters are slow enough (for a reason, but still) that doing so is currently annoying. On my notebook, they can easily take half an hour, during which my notebook is otherwise hardly usable. 3. You're developing a new linter and only want to run *that* one (as there was no change about the other ones). Probably, the nicest result would be this PR landing in batteries (perhaps in pieces) instead of here. --- I'm not happy about one detail: - many options take an `Array String`: how can I pass this to the executable? This is not obvious to me... - TODO: address the comment at https://github.com/leanprover-community/mathlib4/pull/14654#discussion_r1685824917 Continuation of #14654. Proof-of-concept; the real implementation should be in batteries/a separate repository. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-linter CI 154/0 lakefile.lean,scripts/run_linter.lean 2 1 ['github-actions'] nobody
178-37308
5 months ago
178-37374
178 days ago
178-37086
178 days
32095 grunweg
author:grunweg
 chore: fix some explicitVarOfIff linter errors Needs a merge, and removing the linter changes... should be re-done and split out! --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) please-adopt WIP merge-conflict 320/146 Mathlib/Analysis/LocallyConvex/Bounded.lean,Mathlib/Analysis/Oscillation.lean,Mathlib/Geometry/Manifold/LocalInvariantProperties.lean,Mathlib/MeasureTheory/Measure/EverywherePos.lean,Mathlib/SetTheory/Ordinal/Topology.lean,Mathlib/Topology/Algebra/Group/Basic.lean,Mathlib/Topology/Algebra/Module/Basic.lean,Mathlib/Topology/Algebra/Monoid.lean,Mathlib/Topology/Bases.lean,Mathlib/Topology/Basic.lean,Mathlib/Topology/Category/TopCat/Basic.lean,Mathlib/Topology/Clopen.lean,Mathlib/Topology/CompactOpen.lean,Mathlib/Topology/Compactness/LocallyCompact.lean,Mathlib/Topology/Constructions.lean,Mathlib/Topology/ContinuousOn.lean,Mathlib/Topology/DenseEmbedding.lean,Mathlib/Topology/Gluing.lean,Mathlib/Topology/Homeomorph.lean,Mathlib/Topology/IndicatorConstPointwise.lean,Mathlib/Topology/Inseparable.lean,Mathlib/Topology/Irreducible.lean,Mathlib/Topology/IsLocalHomeomorph.lean,Mathlib/Topology/LocalAtTarget.lean,Mathlib/Topology/Maps/Basic.lean,Mathlib/Topology/MetricSpace/Isometry.lean,Mathlib/Topology/NoetherianSpace.lean,Mathlib/Topology/Order.lean,Mathlib/Topology/Order/LowerUpperTopology.lean,Mathlib/Topology/Partial.lean,Mathlib/Topology/PartialHomeomorph.lean,Mathlib/Topology/PartitionOfUnity.lean,Mathlib/Topology/QuasiSeparated.lean,Mathlib/Topology/Separation.lean,Mathlib/Topology/TietzeExtension.lean,Mathlib/Topology/UniformSpace/Ascoli.lean,Mathlib/Topology/UniformSpace/Basic.lean,Mathlib/Topology/UniformSpace/Cauchy.lean,Mathlib/Topology/UniformSpace/CompactConvergence.lean,Mathlib/Topology/UniformSpace/Completion.lean,Mathlib/Topology/UniformSpace/Equicontinuity.lean,Mathlib/Topology/UniformSpace/Matrix.lean,Mathlib/Topology/UniformSpace/Pi.lean,Mathlib/Topology/UnitInterval.lean,Mathlib/Topology/UrysohnsBounded.lean,Mathlib/Topology/UrysohnsLemma.lean,Mathlib/Topology/VectorBundle/Basic.lean,lakefile.lean,scripts/run_linter.lean 49 0 [] nobody
178-37216
5 months ago
178-37257
178 days ago
0-8
8 seconds
31796 dobronx1325
author:dobronx1325
 feat(Data/Real/EReal): add mul_lt_mul_of_pos_left theorem This PR adds the theorem `EReal.mul_lt_mul_of_pos_left`, which states that for a positive real number `a` and extended reals `b < c`, left multiplication by `a` preserves the strict order: `(a : EReal) * b < (a : EReal) * c`. The theorem complements existing order-preserving properties for addition in `EReal` and extends the algebraic structure for multiplication. The proof uses basic properties of extended reals and order relations. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-data new-contributor 23/0 Mathlib/Data/EReal/Operations.lean 1 4 ['JovanGerb', 'LLaurance', 'dobronx1325', 'github-actions'] nobody
177-65495
5 months ago
178-35407
178 days ago
6-24874
6 days
29899 eric-wieser
author:eric-wieser
 chore: add `=Q` arguments to ring casting operations This also detects an `isDefeq` which is unifying across universes and types, which I remember rumors about being sometimes a bad idea. I'm a little worried that the `=Q` design here runs into DTT hell, but it works in the one place that is "Qq-clean" right now, so I'd be inclined to apply it to help us learn more about the pattern in future. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-meta 36/23 Mathlib/Tactic/Ring/Basic.lean 1 2 ['github-actions', 'mathlib4-merge-conflict-bot'] nobody
177-64667
5 months ago
unknown
0-0
0 seconds
31920 thorimur
author:thorimur
 test: `env_linter` for unused decidable instances --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict 128/0 Mathlib.lean,Mathlib/Tactic.lean,Mathlib/Tactic/Linter.lean,Mathlib/Tactic/Linter/DirectoryDependency.lean,Mathlib/Tactic/Linter/UnusedAssumptionInType.lean 5 19 ['github-actions', 'leanprover-bot', 'leanprover-radar', 'mathlib4-merge-conflict-bot', 'thorimur'] nobody
177-61281
5 months ago
unknown
0-0
0 seconds
27258 JovanGerb
author:JovanGerb
 feat: Imo2020 q6 Original PR: #23431 This PR adds a solution to IMO 2020 Q6. It follows the solution that I found when I was participating in the IMO. I used the statement formalization that was given by @jsm28. --- - [x] depends on: #27257 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) IMO awaiting-author 335/0 Archive.lean,Archive/Imo/Imo2020Q6.lean 2 14 ['JovanGerb', 'dwrensha', 'github-actions', 'jsm28', 'mathlib4-dependent-issues-bot'] dwrensha
assignee:dwrensha
177-30773
5 months ago
177-30773
177 days ago
64-4663
64 days
26138 xroblot
author:xroblot
 Development branch (2) --- WIP merge-conflict 331/70 Mathlib/Algebra/Algebra/Subalgebra/Lattice.lean,Mathlib/FieldTheory/Finite/GaloisField.lean,Mathlib/FieldTheory/Galois/IsGaloisGroup.lean,Mathlib/FieldTheory/IntermediateField/Adjoin/Defs.lean,Mathlib/NumberTheory/NumberField/CMField.lean,Mathlib/NumberTheory/NumberField/Cyclotomic/Embeddings.lean,Mathlib/NumberTheory/NumberField/InfinitePlace/Basic.lean,Mathlib/NumberTheory/NumberField/InfinitePlace/Embeddings.lean,Mathlib/NumberTheory/NumberField/InfinitePlace/Ramification.lean,Mathlib/NumberTheory/NumberField/InfinitePlace/TotallyRealComplex.lean,Mathlib/Sandbox.lean 11 16 ['github-actions', 'leanprover-community-bot-assistant', 'mathlib4-merge-conflict-bot'] nobody
177-19749
5 months ago
337-49983
337 days ago
0-12
12 seconds
29357 eric-wieser
author:eric-wieser
 refactor: generalize IsSimpleRing to semirings --- - [ ] depends on: #26277 - [ ] depends on: #22954 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) blocked-by-other-PR 26/9 Mathlib/Data/Setoid/Basic.lean,Mathlib/RingTheory/SimpleRing/Basic.lean,Mathlib/RingTheory/SimpleRing/Defs.lean 3 2 ['github-actions', 'mathlib4-dependent-issues-bot'] nobody
177-19245
5 months ago
unknown
0-0
0 seconds
31729 thorimur
author:thorimur
 chore: log on theorem type signature in unused instances in type linters Logs on the type signature in the unused instances in types linter, and tests this using `#guard_msgs (positions := true)`. --- - [ ] depends on: #31730 - [x] depends on: #31142 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict blocked-by-other-PR large-import 636/3 Mathlib.lean,Mathlib/Lean/Elab/InfoTree.lean,Mathlib/Lean/Environment.lean,Mathlib/Lean/Expr.lean,Mathlib/Lean/Expr/Basic.lean,Mathlib/Lean/Syntax.lean,Mathlib/Tactic.lean,Mathlib/Tactic/Linter.lean,Mathlib/Tactic/Linter/DirectoryDependency.lean,Mathlib/Tactic/Linter/UnusedInstancesInType.lean,Mathlib/Util/DeclarationManipulation.lean,MathlibTest/UnusedInstancesInType.lean 12 3 ['github-actions', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
177-4075
5 months ago
186-78657
186 days ago
0-697
11 minutes
32157 peabrainiac
author:peabrainiac
 feat(Analysis/Calculus): Hadamard's lemma Add [Hadamard's lemma](https://en.wikipedia.org/wiki/Hadamard%27s_lemma) for functions from finite-dimensional normed spaces to Banach spaces. --- - [ ] depends on: #31141 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-analysis blocked-by-other-PR 314/5 Mathlib.lean,Mathlib/Analysis/Calculus/Hadamard.lean,Mathlib/Analysis/Calculus/ParametricIntegral.lean,Mathlib/Analysis/Calculus/ParametricIntervalIntegral.lean,Mathlib/MeasureTheory/Integral/DominatedConvergence.lean 5 2 ['github-actions', 'mathlib4-dependent-issues-bot'] nobody
176-81010
5 months ago
176-81011
176 days ago
0-1385
23 minutes
26436 AntoineChambert-Loir
author:AntoineChambert-Loir
 feat(Mathlib/Data/Nat/Prime/Defs): fuel Nat.minFac This is a fueled version of docs#Nat.minFacAux that can now be checked by `decide`. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-data awaiting-author 53/48 Mathlib/Data/Nat/Prime/Defs.lean 1 3 ['digama0', 'github-actions', 'leanprover-community-bot-assistant'] nobody
176-48461
5 months ago
330-33249
330 days ago
0-60
1 minute
24514 b-mehta
author:b-mehta
 chore(Int/GCD): use fuel in xgcd Modify the definition of xgcd to use fuel recursion, to allow it to be reduced in the kernel. As a consequence, this means the evaluation of field operations in ZMod p become provable by `rfl` and `decide`. Zulip discussion: https://leanprover.zulipchat.com/#narrow/channel/270676-lean4/topic/opaque.20recursion.20definitions.20break.20mergeSort.20decidability --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) awaiting-author t-data merge-conflict 44/22 Mathlib/Data/Int/GCD.lean 1 6 ['astrainfinita', 'b-mehta', 'eric-wieser', 'github-actions', 'mathlib4-merge-conflict-bot', 'nomeata', 'urkud'] nobody
176-38991
5 months ago
327-78869
327 days ago
58-34020
58 days
30375 sinhp
author:sinhp
 feat(CategoryTheory): Basics of Locally Cartesian Closed Categories Supersedes https://github.com/leanprover-community/mathlib4/pull/22321 This PR defines locally cartesian closed categories in terms of existence of the pushforward functors (right adjoint to the pullback functor) for all morphisms. We develop basic API and prove the following: 1. Existence of the pushforward functors is equivalent to cartesian closed slices. 2. Any locally cartesian closed category with a terminal object is cartesian closed. 3. The slices of a locally cartesian closed category are locally cartesian closed. --- - [ ] depends on: #31033 - [ ] depends on: #30373 - [ ] depends on: #31332 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-category-theory merge-conflict WIP blocked-by-other-PR 1085/0 Mathlib.lean,Mathlib/CategoryTheory/LocallyCartesianClosed/Basic.lean,Mathlib/CategoryTheory/LocallyCartesianClosed/ChosenPullbacksAlong.lean,Mathlib/CategoryTheory/LocallyCartesianClosed/ExponentiableMorphism.lean,Mathlib/CategoryTheory/LocallyCartesianClosed/Sections.lean 5 9 ['Jlh18', 'github-actions', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot', 'sinhp'] nobody
176-1073
5 months ago
225-24053
225 days ago
0-2073
34 minutes
32169 saodimao20
author:saodimao20
 feat: add convolution_comp_add_right This PR adds a lemma `convolution_comp_translation_right` showing that convolution commutes with translation on the right operand. Specifically, it proves that for an additive commutative group $G$, the convolution of a function $f$ with a translated function $x \mapsto g(a + x)$ is equal to the convolution of $f$ and $g$ evaluated at $x + a$. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-analysis new-contributor awaiting-author 14/0 Mathlib/Analysis/Convolution.lean 1 3 ['github-actions', 'urkud'] nobody
175-51875
5 months ago
175-51875
175 days ago
0-82278
22 hours
28244 robin-carlier
author:robin-carlier
 feat(CategoryTheory/Bicategory/NaturalTransformation): Icons We define icons (short for Identity Component Oplax Natural transformations) between lax functors in bicategories. Such transformations bundle an oplax natural transformation, along with the assertion that the source and target functor agree on objects, and the fact that the app-component of the underlying natural transformation is the `eqToHom` morphism along that equality. We define vertical composition of such natural transformations. Strict associativity and strict unitality of the composition of icons will be the content of a follow-up PR. In future work, icons will constitute the 2-cells of a strict bicategory structure on bicategories, with 1-cells (strictly unitary) pseudofunctors. This bicategory structure will define a category structure on strictly unitary pseudofunctors from `LocallyDiscrete (Fin n)` to a bicategory `C` (i.e "pseudo-composable arrows" in `C`), which will be part of the definition of the 2-nerve of `C`, which is a simplicial category that encodes higher compositions within a bicategory `C`. --- - [ ] depends on: #25825 - [ ] depends on: #28243 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) WIP blocked-by-other-PR t-category-theory awaiting-CI large-import merge-conflict 816/33 Mathlib.lean,Mathlib/CategoryTheory/Bicategory/EqToHom.lean,Mathlib/CategoryTheory/Bicategory/NaturalTransformation/Icon.lean,Mathlib/CategoryTheory/Bicategory/NaturalTransformation/Lax.lean,Mathlib/CategoryTheory/Bicategory/NaturalTransformation/Oplax.lean,Mathlib/CategoryTheory/Bicategory/Strict.lean,Mathlib/CategoryTheory/EqToHom.lean,scripts/noshake.json 8 4 ['github-actions', 'joelriou', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
175-21409
5 months ago
284-23322
284 days ago
0-1160
19 minutes
29933 smmercuri
author:smmercuri
 chore: fix `def` naming isses in `Normed/Field/WithAbs.lean` --- - [x] depends on: #29932 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) WIP merge-conflict 33/23 Mathlib/Analysis/Normed/Field/WithAbs.lean,Mathlib/NumberTheory/NumberField/AdeleRing.lean,Mathlib/NumberTheory/NumberField/InfinitePlace/Completion.lean 3 3 ['github-actions', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
175-12534
5 months ago
239-20937
239 days ago
1-17350
1 day
31350 grunweg
author:grunweg
 feat: (unoriented) bordism groups We define the unoriented bordism group of a topological space and prove that it is an abelian group: we don't prove transitivity of bordisms yet, as that requires the collar neighbourhood theorem and gluing of smooth manifolds, which are both not in mathlib and a sizable piece of work. --- This PR is not ready for review yet; I'm merely opening this to track this branch' state better. In particular, this PR depends on several preliminary PRs: - [ ] depends on: #15906 for defining singular manifolds - [ ] depends on: #23040: define immersions and smooth embeddings: in finite dimensions, these are easy to describe; for mathlib, we will want a correct definition for e.g. Banach manifolds also. - [ ] depends on: #28793 is the first step for this - [ ] depends on: #31351 defines manifolds with smooth boundary: the main dependence are smooth embeddings (and some basic results about these), then the definition needs redoing. - depends on: #22874 for some constructions - defining unoriented bordisms, and proving some basic constructions about them: will be another PR This PR continues the work from #23138. merge-conflict WIP t-differential-geometry blocked-by-other-PR 1084/2 Mathlib.lean,Mathlib/Geometry/Manifold/Bordisms.lean,Mathlib/Geometry/Manifold/Diffeomorph.lean,Mathlib/Geometry/Manifold/HasSmoothBoundary.lean,Mathlib/Geometry/Manifold/Instances/Real.lean,Mathlib/Geometry/Manifold/MFDeriv/SpecificFunctions.lean 6 2 ['github-actions', 'mathlib4-dependent-issues-bot'] nobody
175-5240
5 months ago
196-45905
196 days ago
0-77
1 minute
32126 nielsvoss
author:nielsvoss
 feat(Analysis/Normed/Operator): definition of singular values for linear maps This PR defines a generalization of singular values, the approximation numbers, for continuous linear maps between normed vector spaces. It proves basic lemmas about the approximation numbers and shows that for finite-dimensional vector spaces, the approximation numbers coincide with the standard definition of singular values. See the discussion on Zulip: https://leanprover.zulipchat.com/#narrow/channel/217875-Is-there-code-for-X.3F/topic/Singular.20Value.20Decomposition/with/558914024 Co-authored-by: Arnav Mehta Co-authored-by: Rawad Kansoh --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) WIP t-analysis new-contributor 331/0 Mathlib/Analysis/Normed/Operator/SingularValues.lean 1 2 ['github-actions', 'nielsvoss'] nobody
175-3016
5 months ago
unknown
0-0
0 seconds
26389 jjdishere
author:jjdishere
 feat(RingTheory): Perfectoid Field This PR continues the work from #19972. Original PR: https://github.com/leanprover-community/mathlib4/pull/19972 t-algebra WIP t-topology t-analysis
label:t-algebra$
 150/0 Mathlib/RingTheory/Perfectoid.lean 1 2 ['github-actions', 'jjdishere'] nobody
174-47299
5 months ago
331-68214
331 days ago
0-69
1 minute
32285 awainverse
author:awainverse
 chore(ModelTheory/Bundled): Replace CategoryTheory.Bundled Replaces the use of CategoryTheory.Bundled L.Structure with a bespoke type for bundled L.Structures, L.StrucType. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-logic awaiting-author merge-conflict 95/55 Mathlib/ModelTheory/Bundled.lean,Mathlib/ModelTheory/Equivalence.lean,Mathlib/ModelTheory/Fraisse.lean,Mathlib/ModelTheory/Order.lean,Mathlib/ModelTheory/Satisfiability.lean 5 3 ['github-actions', 'jcommelin', 'mathlib-merge-conflicts'] nobody
172-30703
5 months ago
172-30703
172 days ago
0-66385
18 hours
28895 yury-harmonic
author:yury-harmonic
 feat(NumberTheory): prove Zsigmondy's theorem --- - [x] depends on: #28879 - [x] depends on: #28825 - [x] depends on: #28833 - [x] depends on: #28888 - [x] depends on: #28830 - [x] depends on: #28765 - [x] depends on: #28886 - [x] depends on: #28934 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) 1307/0 Mathlib.lean,Mathlib/NumberTheory/Zsigmondy.lean 2 8 ['dupuisf', 'github-actions', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot', 'yury-harmonic'] nobody
171-18837
5 months ago
unknown
0-0
0 seconds
31950 callesonne
author:callesonne
 feat(CategoryTheory/Product/Basic): make `Hom` into a 1-field structure This should help unification. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) WIP t-category-theory merge-conflict 80/68 Mathlib/CategoryTheory/Comma/Basic.lean,Mathlib/CategoryTheory/Discrete/SumsProducts.lean,Mathlib/CategoryTheory/Functor/Currying.lean,Mathlib/CategoryTheory/Functor/CurryingThree.lean,Mathlib/CategoryTheory/Functor/Hom.lean,Mathlib/CategoryTheory/Groupoid.lean,Mathlib/CategoryTheory/Limits/FormalCoproducts.lean,Mathlib/CategoryTheory/Monoidal/Category.lean,Mathlib/CategoryTheory/MorphismProperty/Basic.lean,Mathlib/CategoryTheory/Products/Associator.lean,Mathlib/CategoryTheory/Products/Basic.lean,Mathlib/CategoryTheory/Products/Unitor.lean,Mathlib/CategoryTheory/Sums/Products.lean,Mathlib/CategoryTheory/Yoneda.lean 14 2 ['github-actions', 'mathlib4-merge-conflict-bot'] nobody
171-17972
5 months ago
181-22922
181 days ago
0-6
6 seconds
8224 Kha
author:Kha
 chore: add `lean4checker` benchmark WIP merge-conflict 16/0 scripts/bench/temci-config.run.yml 1 4 ['Kha', 'grunweg', 'kim-em', 'leanprover-bot', 'mathlib4-merge-conflict-bot'] nobody
171-4246
5 months ago
928-37431
928 days ago
0-7460
2 hours
22416 JLimperg
author:JLimperg
 chore: fix benchmark script for precompilation The benchmarking script used to fail when precompilation was enabled anywhere in the dependency graph. --- Fix courtesy of @Kha. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict 2/0 scripts/bench/fake-root/lib/lean/libleanshared.so,scripts/bench/run 2 2 ['github-actions', 'mathlib4-merge-conflict-bot'] nobody
171-3104
5 months ago
unknown
0-0
0 seconds
27579 RemyDegenne
author:RemyDegenne
 feat: risk of an estimator, DeGroot statistical information, total variation distance This is an overview PR and will be cut into several pieces. It contains definitions and properties of: - the risk and Bayes risk of an estimator, in general and then specialized to binary hypothesis testing - the DeGroot statistical information between two measures, as well as a generalization for a kernel on more than two outcomes - the total variation distance between measures, defined as a special case of the DeGroot statistical information Co-authored-by: Lorenzo Luccioli @LorenzoLuccioli From the TestingLowerBounds project --- - [x] depends on: #27583 - [x] depends on: #27584 - [x] depends on: #27585 - [x] depends on: #27586 - [x] depends on: #27587 - [x] depends on: #27591 - [x] depends on: #28081 - [x] depends on: #28082 - [x] depends on: #28117 - [x] depends on: #28341 - [x] depends on: #29137 - [x] depends on: #29143 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) WIP large-import t-measure-probability 1713/1 Mathlib.lean,Mathlib/InformationTheory/TotalVariation/Basic.lean,Mathlib/Probability/Decision/AuxLemmas.lean,Mathlib/Probability/Decision/BayesEstimator.lean,Mathlib/Probability/Decision/Binary.lean,Mathlib/Probability/Decision/BoolMeasure.lean,Mathlib/Probability/Decision/DeGrootInfo.lean,Mathlib/Probability/Decision/Risk/Basic.lean,Mathlib/Probability/Decision/Risk/Countable.lean,Mathlib/Probability/Decision/RiskIncrease.lean,Mathlib/Probability/Decision/ZeroOneLoss.lean 11 7 ['github-actions', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
170-32488
5 months ago
298-48288
298 days ago
0-1
1 second
30966 gasparattila
author:gasparattila
 refactor: disable `simp` in `measurability` --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict 5/3 Mathlib/MeasureTheory/MeasurableSpace/Constructions.lean,Mathlib/MeasureTheory/MeasurableSpace/Defs.lean,Mathlib/MeasureTheory/Measure/MeasureSpaceDef.lean,Mathlib/MeasureTheory/Measure/Typeclasses/SFinite.lean,Mathlib/Tactic/Measurability.lean 5 8 ['github-actions', 'grunweg', 'leanprover-bot', 'mathlib4-merge-conflict-bot'] nobody
170-25718
5 months ago
unknown
0-0
0 seconds
29315 kbuzzard
author:kbuzzard
 chore: raise priority of `IsTopologicalSemiring.toIsModuleTopology` Instances of the form `SMul A B -> SMul (F A) (F B)` can be problematic for several reasons, one of them being that if `A = B` is a ring and if `F A` is also ring then this can cause a diamond with `Algebra.id`. In mathlib we attempt to coerce typeclass inference away from such problems by raising the priority of `Algebra.id` to 1100; this hack (implemented in #13032) seems to work well, indeed it seems sensible to try this instance early because it should be quick to fail and is always the right idea when it doesn't (the change also made mathlib faster and made a proof better). By the same logic it seems safe to raise the priority of `IsTopologicalSemiring.toIsModuleTopology` by the same amount; in FLT there is a mathematically natural but mathlib-problematic instance `Algebra K L -> Algebra (𝔸 K) (𝔸 L)` and then another instance `Algebra K L -> IsModuleTopology (𝔸 K) (𝔸 L)` where `𝔸 K` is the adele ring of the number field `K`, and the change in this PR solves timeouts when `K = L`. Zulip: [#mathlib4 > product of modules over product of rings @ 💬](https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/product.20of.20modules.20over.20product.20of.20rings/near/532799613) --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) There are other solutions to this problem -- I am certainly not claiming that the FLT project needs this PR to be merged! We can tinker with priorities locally in FLT for example. However when I noticed that `Algebra.id` had a raised priority in mathlib I realised that mathlib might be amenable to this further ~~hack~~change. awaiting-author t-topology 6/1 Mathlib/Topology/Algebra/Module/ModuleTopology.lean 1 9 ['github-actions', 'j-loreaux', 'kbuzzard', 'leanprover-bot', 'ocfnash'] ocfnash
assignee:ocfnash
169-29605
5 months ago
236-27969
236 days ago
25-3388
25 days
32474 mattrobball
author:mattrobball
 perf(Module.LinearMap.Defs): deprioritize projections to parents for SemilinearMapClass Trying to figure out if a given type has a SemilinearMapClass instance when all we want is an AddHomClass or a MulActionSemiHomClass can be quite expensive since there are multiple ways to crawl the algebraic hierarchy to generate LinearMapClass instances. If these fail, then they fail slowly. We deprioritize the projections from SemilinearMapClass to AddHomClass and MulActionSemiHomClass to make this one of the last choices. --- This PR continues #23214 which was delegated by @j-loreaux but I let it slip. Will re-bench and see the effect. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra
label:t-algebra$
 6/0 Mathlib/Algebra/Module/LinearMap/Defs.lean 1 1 ['github-actions'] nobody
168-28585
5 months ago
168-28985
168 days ago
168-28697
168 days
31898 ntapiam
author:ntapiam
 feat(LinearAlgebra/TensorAlgebra): implement HopfAlgebra for TensorAlgebra implementation of the natural Hopf algebra structure on the TensorAlgebra new-contributor t-ring-theory awaiting-author 253/0 Mathlib.lean,Mathlib/Algebra/FreeAlgebra.lean,Mathlib/LinearAlgebra/TensorAlgebra/Basic.lean,Mathlib/RingTheory/Bialgebra/FreeAlgebra.lean,Mathlib/RingTheory/Bialgebra/TensorAlgebra.lean,Mathlib/RingTheory/HopfAlgebra/TensorAlgebra.lean 6 64 ['YaelDillies', 'github-actions', 'kckennylau', 'ntapiam'] nobody
168-23852
5 months ago
180-77065
180 days ago
0-33607
9 hours
30525 515801431
author:515801431
 feat(Mathlib/Combinatorics/Enumerative/Polya): Add Polya Counting This PR introduces basic definitions and results about colorings under permutation group actions. A coloring is defined as a function X → Y, and the permutation group Equiv.Perm X acts on colorings by precomposition: (g • c) x = c (g⁻¹ • x) This formalizes the natural action of relabeling the elements of X. Main definitions MulAction (Equiv.Perm X) (X → Y): The action of the permutation group on colorings via precomposition. coloringEquiv (c₁ c₂ : X → Y) : Prop: Two colorings are equivalent if they lie in the same orbit under this action, i.e. ∃ f : Equiv.Perm X, f • c₁ = c₂. Main results smul_eq_iff_mem_stabilizer: Characterizes when two group actions on the same coloring are equal, showing that g • c = f • c ↔ f⁻¹ * g ∈ stabilizer c. coloringEquiv_equivalence: Proves that coloringEquiv defines an equivalence relation on X → Y. orbit_size_eq_index: Reformulates the orbit–stabilizer theorem in the context of colorings: |orbit c| = |Perm X| / |stabilizer c| Motivation These results provide foundational infrastructure for studying Burnside’s lemma and Pólya’s enumeration theorem in Mathlib, where the enumeration of distinct colorings up to symmetry plays a central role. t-combinatorics new-contributor awaiting-author merge-conflict 113/0 Mathlib.lean,Mathlib/Combinatorics/Enumerative/Polya.lean 2 8 ['IvanRenison', 'alreadydone', 'github-actions', 'mathlib4-merge-conflict-bot'] awainverse
assignee:awainverse
168-10614
5 months ago
176-54157
176 days ago
39-43570
39 days
31113 515801431
author:515801431
 feat(Mathlib/Combinatorics/Enumerative/Polya.lean): Add additional theorem in `Polya.lean` --- - [ ] depends on: #30525 --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-combinatorics new-contributor blocked-by-other-PR merge-conflict 302/0 Mathlib.lean,Mathlib/Combinatorics/Enumerative/Polya.lean 2 4 ['github-actions', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] b-mehta
assignee:b-mehta
168-10490
5 months ago
177-32916
177 days ago
16-78251
16 days
24441 MrSumato
author:MrSumato
 feat(Data/List): add Lyndon-Schutzenberger theorem on list commutativity Add Lyndon-Schutzenberger theorem on list commutativity. Included definition for List.repeatSelf that returns list repeated n times. --- This is my first mathlib PR, so any comments are highly appreciated. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict awaiting-author t-data new-contributor 129/1 Mathlib.lean,Mathlib/Data/List/Commutativity.lean,Mathlib/Data/List/Defs.lean,Mathlib/Data/List/Lemmas.lean 4 38 ['MrSumato', 'github-actions', 'grunweg', 'madvorak', 'mathlib4-merge-conflict-bot', 'plp127'] grunweg
assignee:grunweg
168-6092
5 months ago
350-32436
350 days ago
29-59355
29 days
28057 plp127
author:plp127
 feat(SuccOrder): simp lemma to refold `Order.succ` and `Order.pred` Adds `SuccOrder.succ_eq_succ` and `PredOrder.pred_eq_pred` to refold `SuccOrder.succ` and `PredOrder.pred` into `Order.succ` and `Order.pred`. These lemmas are marked `@[simp]`. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) awaiting-author t-order merge-conflict 8/2 Mathlib/Order/SuccPred/Basic.lean 1 4 ['YaelDillies', 'github-actions', 'mathlib4-merge-conflict-bot', 'plp127', 'vihdzp'] bryangingechen
assignee:bryangingechen
167-72120
5 months ago
245-1428
245 days ago
44-13238
44 days
31601 BoltonBailey
author:BoltonBailey
 feat(Data/Nat/Choose): A new strictly positive binomial coefficient This is an experimental PR relating to replacing `Nat.choose` with a strictly positive function equivalently to `Nat.choose a (a + b)`. Currently this introduces a new function `Nat.binom`, but we could also modify `Nat.multinomial`. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-data merge-conflict 226/1 Mathlib/Data/Nat/Choose/Binomial.lean,Mathlib/Data/Nat/Choose/Multinomial.lean 2 2 ['github-actions', 'mathlib-merge-conflicts'] nobody
167-50380
5 months ago
unknown
0-0
0 seconds
32473 mattrobball
author:mattrobball
 chore(Kaehler.JacobiZariski): remove egregious local instance hack This code looks terrible and is no longer strictly necessary. Local timings give `lake build Mathlib/RingTheory/Kaehler/JacobiZariski.lean 39.77s user 1.07s system 263% cpu 15.482 total` after removal and `lake build Mathlib/RingTheory/Kaehler/JacobiZariski.lean 36.93s user 1.01s system 251% cpu 15.113 total` before the removal. So the preformance impact of removal is small. One could argue that keeping is a remainder that everything here needs to be seriously changed but the miminmal performance difference suggests that these local instances would be a red herring in that regard. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-ring-theory awaiting-author merge-conflict 0/4 Mathlib/RingTheory/Kaehler/JacobiZariski.lean 1 14 ['chrisflav', 'erdOne', 'github-actions', 'leanprover-radar', 'mathlib-merge-conflicts', 'mattrobball'] nobody
167-29715
5 months ago
167-29715
167 days ago
1-301
1 day
27525 Hagb
author:Hagb
 (WIP) feat(Tactic/Linter/Indentation): add a linter for general indentation --- todo: - [x] check whether some (direct or indirect) children of some kinds of parents are intended _strictly_ deeper than this parent. For example: ```lean example : Nat := Nat.add 1 -- should be strictly deeper than `Nat.add`? 2 ``` - [ ] check whether some (direct or indirect) children of some kinds of parents are intended exactly N spaces deeper than this parent. For example: ```lean example : True := trivial -- should be exact 2 spaces deeper than 0 space of `example` ``` - [ ] some special cases, such as `calc`. https://github.com/leanprover-community/mathlib4/blob/5ebccb65951c70539ba1c36e53e079ac28b3fd23/Mathlib/Geometry/Manifold/Riemannian/Basic.lean#L452-L454 - [ ] add test cases [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict WIP t-linter large-import 1364/1 Mathlib/Init.lean,Mathlib/Tactic/Linter/Indentation.lean,Mathlib/Tactic/Linter/Indentation/Basic.lean,Mathlib/Tactic/Linter/Indentation/Defs.lean,Mathlib/Tactic/Linter/Indentation/Linters.lean,MathlibTest/IndentationLinter.lean,lakefile.lean 7 15 ['Hagb', 'github-actions', 'grunweg', 'mathlib4-merge-conflict-bot'] nobody
166-71679
5 months ago
unknown
0-0
0 seconds
31147 daefigueroa
author:daefigueroa
 feat(Dynamics): point transitive monoid actions and transitive points We define point transitivity for a monoid action on a topological space and define the set of transitive points. We add some basic lemmas and implications between topological transitivity and point transitivity. --- - [x] depends on: #28001 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-dynamics new-contributor awaiting-author 114/6 Mathlib/Dynamics/Transitive.lean 1 6 ['github-actions', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot', 'sgouezel'] sgouezel
assignee:sgouezel
165-31325
5 months ago
165-31325
165 days ago
18-38983
18 days
30711 kim-em
author:kim-em
 experiment: which `omega` can not be replaced with `grind`? 1/0 lakefile.lean 1 2 ['github-actions', 'mathlib4-merge-conflict-bot'] nobody
165-24398
5 months ago
unknown
0-0
0 seconds
30718 kim-em
author:kim-em
 experiment: merge rewrites t-meta 1/0 lakefile.lean 1 3 ['github-actions', 'mathlib4-merge-conflict-bot'] nobody
165-24396
5 months ago
unknown
0-0
0 seconds
30720 kim-em
author:kim-em
 experiment: merge with subsequent grind 1/0 lakefile.lean 1 2 ['github-actions', 'mathlib4-merge-conflict-bot'] nobody
165-24396
5 months ago
unknown
0-0
0 seconds
25871 eric-wieser
author:eric-wieser
 refactor: generalize rank lemmas to semirings --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra merge-conflict
label:t-algebra$
 18/8 Mathlib/LinearAlgebra/Dimension/Finite.lean 1 2 ['github-actions', 'mathlib4-merge-conflict-bot'] nobody
164-65774
5 months ago
unknown
0-0
0 seconds
30119 Ruben-VandeVelde
author:Ruben-VandeVelde
 feat: WithTop/Bot.mapD To replace Option.elim; working towards #27918 --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) awaiting-author t-order merge-conflict 32/4 Mathlib/Order/Hom/WithTopBot.lean,Mathlib/Order/WithBot.lean 2 5 ['JovanGerb', 'YaelDillies', 'github-actions', 'mathlib4-merge-conflict-bot'] nobody
164-57903
5 months ago
220-45995
220 days ago
12-3204
12 days
32328 ADedecker
author:ADedecker
 feat: template for distributions and their API --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) large-import t-analysis merge-conflict 888/5 Mathlib.lean,Mathlib/Analysis/Distribution/ContDiffMapSupportedIn.lean,Mathlib/Analysis/Distribution/Distribution.lean,Mathlib/Analysis/Distribution/TestFunction.lean 4 4 ['github-actions', 'mathlib4-merge-conflict-bot'] nobody
164-1637
5 months ago
unknown
0-0
0 seconds
23040 grunweg
author:grunweg
 feat: define immersions and smooth embeddings in infinite dimensions Sadly, we cannot prove most nice things about them yet, as we don't have the inverse function theorem yet. TODO: prove the few things we can already say --- - [ ] depends on: #28796 - [x] depends on: #28853 - [x] depends on: #23175 (preliminaries) - [x] depends on: #23186 - [ ] depends on: another PR, about `MSplitAt` (to be filed) - and perhaps some prerequisites about products of complemented modules etc. - [x] depends on: #23219 (preliminaries about local diffeomorphisms) - [x] depends on: #8738 - in fact, #9273 is not a strict pre-requisite for this. It suffices to know "extended charts have invertible differentials", which [isInvertible_mfderiv_extChartAt](https://leanprover-community.github.io/mathlib4_docs/Mathlib/Geometry/Manifold/MFDeriv/Atlas.html#isInvertible_mfderiv_extChartAt) mostly proves. (There's nothing wrong with completing that PR, for all interior points.) [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict WIP t-differential-geometry blocked-by-other-PR 967/0 Mathlib.lean,Mathlib/Analysis/NormedSpace/HahnBanach/Splits.lean,Mathlib/Geometry/Manifold/IsImmersionEmbedding.lean,Mathlib/Geometry/Manifold/LocalDiffeomorph.lean,Mathlib/Geometry/Manifold/MSplits.lean 5 4 ['github-actions', 'grunweg', 'leanprover-community-bot-assistant', 'mathlib4-dependent-issues-bot'] nobody
163-31482
5 months ago
unknown
0-0
0 seconds
30668 astrainfinita
author:astrainfinita
 feat: `QuotType` This typeclass is primarily for use by type synonyms of `Quot` and `Quotient`. Using `QuotType` API for type synonyms of `Quot` and `Quotient` will avoid defeq abuse caused by directly using `Quot` and `Quotient` APIs. This PR also adds some typeclasses to support different ways to find the quotient map that should be used. See the documentation comments of these typeclasses for examples of usage. --- It's not a typical design to use these auxiliary typeclasses and term elaborators, but I haven't found a better way to support these notations. Some of the naming may need to be discussed. For example: - `⟦·⟧` is currently called `mkQ` in names. This distinguishes it from other `.mk`s and makes it possible to write the quotient map as `mkQ` `mkQ'` ~~`mkQ_ h`~~. But this will also require changing the old lemma names. - It would be helpful if the names of new type classes explained their functionality better. [Zulip](https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/migrate.20to.20.60QuotLike.60.20API) This PR continues the work from #16421. Original PR: https://github.com/leanprover-community/mathlib4/pull/16421 RFC t-data awaiting-zulip awaiting-author 629/0 Mathlib.lean,Mathlib/Data/QuotType.lean,MathlibTest/QuotType.lean 3 22 ['SnirBroshi', 'YaelDillies', 'astrainfinita', 'dagurtomas', 'github-actions', 'mathlib4-merge-conflict-bot', 'plp127', 'vihdzp'] nobody
163-5617
5 months ago
215-60870
215 days ago
0-81
1 minute
32706 CoolRmal
author:CoolRmal
 feat: a set is Gdelta iff it is completely metrizable This PR proves that 1. A Gdelta subset of a completely metrizable space is completely metrizable. 2. We prove that under certain conditions we can always extends a continuous function on a set A to a Gdelta set. We then use this lemma to prove that if `A` is a completely metrizable subset in a metric space `M`, then `A` is Gdelta. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-topology 29/0 Mathlib/Topology/Metrizable/CompletelyMetrizable.lean 1 1 ['github-actions'] nobody
162-82761
5 months ago
unknown
0-0
0 seconds
30847 joelriou
author:joelriou
 feat(CategoryTheory/Presentable): the representation theorem If `C` is an essentially `w`-small category, then the category of `κ`-continuous functors `Cᵒᵖ ⥤ Type w` is locally `κ`-presentable, and any locally `κ`-presentable category is equivalent to such a category. In particular, we show that a locally `κ`-presentable category has limits. This is a draft... --- - [ ] depends on: #32423 - [ ] depends on: #32424 - [ ] depends on: #32034 - [ ] depends on: #31137 - [ ] depends on: #30817 - [x] depends on: #30795 - [ ] depends on: #30755 - [ ] depends on: #30731 - [ ] depends on: #30554 - [ ] depends on: #30533 - [ ] depends on: #30513 - [x] depends on: #30509 - [x] depends on: #30507 - [x] depends on: #30492 - [x] depends on: #30464 - [x] depends on: #30459 - [x] depends on: #30269 - [ ] depends on: #30247 - [ ] depends on: #30241 - [x] depends on: #30168 - [x] depends on: #30160 - [x] depends on: #29881 - [x] depends on: #29854 - [x] depends on: #29565 - [x] depends on: #29543 - [x] depends on: #29519 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) WIP blocked-by-other-PR t-category-theory merge-conflict 2137/27 Mathlib.lean,Mathlib/CategoryTheory/Adjunction/Basic.lean,Mathlib/CategoryTheory/EssentiallySmall.lean,Mathlib/CategoryTheory/Functor/KanExtension/Dense.lean,Mathlib/CategoryTheory/Generator/Basic.lean,Mathlib/CategoryTheory/Generator/Type.lean,Mathlib/CategoryTheory/Limits/HasLimits.lean,Mathlib/CategoryTheory/Limits/Shapes/Multiequalizer.lean,Mathlib/CategoryTheory/Limits/Types/Limits.lean,Mathlib/CategoryTheory/MorphismProperty/Basic.lean,Mathlib/CategoryTheory/MorphismProperty/IsSmall.lean,Mathlib/CategoryTheory/ObjectProperty/Basic.lean,Mathlib/CategoryTheory/ObjectProperty/ClosedUnderIsomorphisms.lean,Mathlib/CategoryTheory/ObjectProperty/ColimitsCardinalClosure.lean,Mathlib/CategoryTheory/ObjectProperty/ColimitsOfShape.lean,Mathlib/CategoryTheory/ObjectProperty/CompleteLattice.lean,Mathlib/CategoryTheory/ObjectProperty/Equivalence.lean,Mathlib/CategoryTheory/ObjectProperty/FunctorCategory/Limits.lean,Mathlib/CategoryTheory/ObjectProperty/FunctorCategory/Presheaf.lean,Mathlib/CategoryTheory/ObjectProperty/LimitsOfShape.lean,Mathlib/CategoryTheory/ObjectProperty/Local.lean,Mathlib/CategoryTheory/ObjectProperty/Small.lean,Mathlib/CategoryTheory/Presentable/Adjunction.lean,Mathlib/CategoryTheory/Presentable/Basic.lean,Mathlib/CategoryTheory/Presentable/Continuous.lean,Mathlib/CategoryTheory/Presentable/Dense.lean,Mathlib/CategoryTheory/Presentable/EssentiallyLarge.lean,Mathlib/CategoryTheory/Presentable/Limits.lean,Mathlib/CategoryTheory/Presentable/LocallyPresentable.lean,Mathlib/CategoryTheory/Presentable/OrthogonalReflection.lean,Mathlib/CategoryTheory/Presentable/Presheaf.lean,Mathlib/CategoryTheory/Presentable/Representation.lean,Mathlib/CategoryTheory/Presentable/StrongGenerator.lean,Mathlib/CategoryTheory/Presentable/Type.lean,Mathlib/CategoryTheory/Yoneda.lean 35 7 ['github-actions', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
162-44557
5 months ago
210-47091
210 days ago
0-1
1 second
30817 joelriou
author:joelriou
 feat(CategoryTheory): `κ`-continuous presheaves Given categories `C`, `D` and a regular cardinal `κ : Cardinal.{w}`, we define `isCardinalContinuous C D κ : ObjectProperty (C ⥤ D)` as the property of functors which preserves limits indexed by categories `J` such that `HasCardinalLT (Arrow J) κ`. When `C : Type w` is a small category, we show that `κ`-continuous functors `Cᵒᵖ ⥤ Type w` are exactly the objects that are local with respect to a suitable `w`-small family of morphisms. DRAFT --- - [ ] depends on: #32725 - [x] depends on: #32423 - [x] depends on: #32424 - [x] depends on: #30168 - [x] depends on: #30160 - [x] depends on: #29881 - [x] depends on: #29854 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) WIP t-category-theory blocked-by-other-PR merge-conflict 292/0 Mathlib.lean,Mathlib/CategoryTheory/Limits/Types/Limits.lean,Mathlib/CategoryTheory/MorphismProperty/Basic.lean,Mathlib/CategoryTheory/MorphismProperty/IsSmall.lean,Mathlib/CategoryTheory/ObjectProperty/FunctorCategory/Presheaf.lean,Mathlib/CategoryTheory/ObjectProperty/Local.lean,Mathlib/CategoryTheory/Presentable/Continuous.lean 7 10 ['github-actions', 'mathlib-merge-conflicts', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
162-36855
5 months ago
211-49518
211 days ago
0-1
1 second
6633 adomani
author:adomani
 feat(..Polynomial..): `MvPolynomial`s have no zero divisors This PR continues #6627, placing the `NoZeroDivisors` instance on `MvPolynomial`s and removing auxiliary intermediate results that are no longer needed. Affected files: ``` Data/MvPolynomial/Basic.lean Data/Polynomial/RingDivision.lean RingTheory/Polynomial/Basic.lean ``` --- - [x] depends on: #6227 for the `NoZeroDivisors` instance on `AddMonoidAlgebra`s [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict awaiting-author t-algebra
label:t-algebra$
 143/57 Mathlib/Algebra/MonoidAlgebra/NoZeroDivisors.lean,Mathlib/Data/MvPolynomial/Basic.lean,Mathlib/Data/Polynomial/RingDivision.lean,Mathlib/RingTheory/Polynomial/Basic.lean 4 6 ['SnirBroshi', 'YaelDillies', 'adomani', 'eric-wieser'] nobody
162-25252
5 months ago
1009-9594
1009 days ago
0-19485
5 hours
28865 grunweg
author:grunweg
 feat: a map is smooth iff its post-composition with an immersion is The continuous case is mostly solved --- except for one detail where I'm not even sure if this is true. Maybe!, I need to require continuity, at least in general. (Perhaps not for interior points... we'll see!) A future PR will use this to golf the results in `Icc/Instances.lean`. --- - [x] depends on: #28793 - [ ] depends on: #28796 - [x] depends on: #28853 (for simplicity) - [ ] depends on: #28905 history bifurcates here: merge that PR first, then rebase this one [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict WIP t-differential-geometry blocked-by-other-PR 1026/7 Mathlib.lean,Mathlib/Analysis/Calculus/ContDiff/Basic.lean,Mathlib/Analysis/Calculus/ContDiff/Defs.lean,Mathlib/Geometry/Manifold/ChartedSpace.lean,Mathlib/Geometry/Manifold/ContMDiff/Atlas.lean,Mathlib/Geometry/Manifold/ContMDiff/Defs.lean,Mathlib/Geometry/Manifold/IsImmersionEmbedding.lean,Mathlib/Geometry/Manifold/IsManifold/Basic.lean,Mathlib/Geometry/Manifold/IsManifold/ExtChartAt.lean,Mathlib/Topology/PartialHomeomorph.lean,docs/references.bib,temp_.sh 12 5 ['github-actions', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot', 'peabrainiac'] nobody
161-78742
5 months ago
271-17788
271 days ago
0-11
11 seconds
26950 alreadydone
author:alreadydone
 Primitives of holomorphic functions and path integral --- - [ ] depends on: #31925 - [x] depends on: #24983 - [x] depends on: #22771 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) WIP merge-conflict t-topology t-analysis blocked-by-other-PR 1288/361 Mathlib.lean,Mathlib/AlgebraicGeometry/ProjectiveSpectrum/StructureSheaf.lean,Mathlib/AlgebraicTopology/FundamentalGroupoid/Basic.lean,Mathlib/AlgebraicTopology/FundamentalGroupoid/FundamentalGroup.lean,Mathlib/AlgebraicTopology/FundamentalGroupoid/InducedMaps.lean,Mathlib/AlgebraicTopology/FundamentalGroupoid/SimplyConnected.lean,Mathlib/Analysis/Complex/Primitive.lean,Mathlib/CategoryTheory/Groupoid.lean,Mathlib/Data/Set/Operations.lean,Mathlib/Geometry/Manifold/Sheaf/Smooth.lean,Mathlib/Logic/Equiv/Basic.lean,Mathlib/Topology/Covering.lean,Mathlib/Topology/EtaleSpace.lean,Mathlib/Topology/FiberBundle/Trivialization.lean,Mathlib/Topology/Homotopy/HomotopyGroup.lean,Mathlib/Topology/Homotopy/Lifting.lean,Mathlib/Topology/Homotopy/Product.lean,Mathlib/Topology/IsLocalHomeomorph.lean,Mathlib/Topology/Sheaves/LocalPredicate.lean,Mathlib/Topology/Sheaves/Sheafify.lean,Mathlib/Topology/Sheaves/Stalks.lean 21 3 ['alreadydone', 'grunweg', 'mathlib4-dependent-issues-bot'] nobody
161-41033
5 months ago
unknown
0-0
0 seconds
32827 erdOne
author:erdOne
 perf: `@[simp high]` on `*Hom.map_add` lemmas --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra awaiting-author
label:t-algebra$
 10/0 Mathlib/Algebra/Module/Equiv/Defs.lean,Mathlib/Algebra/Module/LinearMap/Defs.lean,Mathlib/Algebra/Ring/Equiv.lean,Mathlib/Algebra/Ring/Hom/Defs.lean 4 4 ['WenrongZou', 'erdOne', 'github-actions', 'leanprover-radar'] nobody
160-66330
5 months ago
unknown
0-0
0 seconds
31987 saodimao20
author:saodimao20
 feat: add monotonicity and relation lemmas for mgf and cgf Add two lemmas about moment-generating and cumulant-generating functions: - `mgf_mono_in_t_of_nonneg`: For nonnegative random variables, the mgf is monotone in the parameter `t` - `cgf_zero_of_mgf_one`: The cgf equals zero iff the mgf equals one These lemmas are useful for studying properties of mgf and cgf in probability theory. Contributed by sequential-intelligence-lab(SIL), University of Virginia --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-measure-probability new-contributor awaiting-author 21/0 Mathlib/Probability/Moments/Basic.lean 1 5 ['DavidLedvinka', 'github-actions'] RemyDegenne
assignee:RemyDegenne
159-23431
5 months ago
159-23431
159 days ago
21-31799
21 days
32211 ADedecker
author:ADedecker
 feat: inclusion from `ContDiffMapSupportedIn` to `TestFunction` is a topological embedding --- - [ ] depends on: #32210 - [x] depends on: #31806 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-analysis blocked-by-other-PR merge-conflict 136/2 Mathlib/Analysis/Distribution/TestFunction.lean,Mathlib/Topology/UniformSpace/UniformEmbedding.lean 2 5 ['github-actions', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
158-5358
5 months ago
175-25198
175 days ago
0-2371
39 minutes
32602 adamtopaz
author:adamtopaz
 feat: Refactor graph Work in progress --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) WIP 1312/0 RefactorGraph/DAG.lean,RefactorGraph/Main.lean,RefactorGraph/Test.lean,lakefile.lean 4 1 ['github-actions'] nobody
157-85879
5 months ago
165-8672
165 days ago
0-1
1 second
26912 pechersky
author:pechersky
 chore(Algebra/Ring/Subring): simp tag `Subring.smul_def` s-multiplying by a subtype is easiest to manipulate when both terms are in the ambient type. Many places that had to use the _def lemma for a rewrite, or to include it in a simp set, no longer have to. Ported from #25308 --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) I found this being not-simp frustrating when talking about submodules over a valuation subring. merge-conflict t-algebra
label:t-algebra$
 67/66 Mathlib/Algebra/Algebra/Subalgebra/Basic.lean,Mathlib/Algebra/Field/Subfield/Basic.lean,Mathlib/Algebra/Group/Subgroup/Actions.lean,Mathlib/Algebra/Group/Submonoid/MulAction.lean,Mathlib/Algebra/Module/LocalizedModule/Basic.lean,Mathlib/Algebra/Module/LocalizedModule/Exact.lean,Mathlib/Algebra/Module/LocalizedModule/IsLocalization.lean,Mathlib/Algebra/Module/LocalizedModule/Submodule.lean,Mathlib/Algebra/Ring/Periodic.lean,Mathlib/Algebra/Ring/Subring/Basic.lean,Mathlib/Algebra/Ring/Subsemiring/Basic.lean,Mathlib/Analysis/CStarAlgebra/Basic.lean,Mathlib/FieldTheory/KummerExtension.lean,Mathlib/GroupTheory/GroupAction/Defs.lean,Mathlib/GroupTheory/GroupAction/MultiplePrimitivity.lean,Mathlib/GroupTheory/GroupAction/MultipleTransitivity.lean,Mathlib/GroupTheory/GroupAction/SubMulAction/OfFixingSubgroup.lean,Mathlib/GroupTheory/GroupAction/SubMulAction/OfStabilizer.lean,Mathlib/LinearAlgebra/RootSystem/Irreducible.lean,Mathlib/LinearAlgebra/RootSystem/WeylGroup.lean,Mathlib/RingTheory/Etale/Kaehler.lean,Mathlib/RingTheory/Ideal/Over.lean,Mathlib/RingTheory/LocalProperties/Projective.lean,Mathlib/RingTheory/Localization/InvSubmonoid.lean,Mathlib/RingTheory/OreLocalization/Basic.lean 25 26 ['artie2000', 'eric-wieser', 'github-actions', 'j-loreaux', 'kckennylau', 'leanprover-bot', 'leanprover-radar', 'linesthatinterlace', 'mathlib4-merge-conflict-bot', 'pechersky'] joelriou
assignee:joelriou
157-82756
5 months ago
179-32305
179 days ago
63-23787
63 days
32737 j-loreaux
author:j-loreaux
 refactor: rename `MulAction` to `MonoidAction` Given that we now have [SemigroupAction](https://leanprover-community.github.io/mathlib4_docs/Mathlib/Algebra/Group/Action/Defs.html#SemigroupAction) we are in the unfortunate scenario that the name which seems to have less structure actually has *more* structure. This PR: 1. renames `MulAction` to `MonoidAction` to reflect this additional structure, as well as declarations referencing `MulAction` in their names. `Prop`-valued mixins in the `MulAction` namespace are also renamed (e.g., `MulAction.{IsMinimal,IsTopologicallyTransitive}` → `MonoidAction.{IsMinimal,IsTopologicallyTransitive`). 2. The additive version are also renamed (`AddAction` → `AddMonoidAction`) and the corresponding `Prop`-valued mixins. 3. does *not* rename modules with `MulAction` in the name 4. does *not* rename `DistribMulAction`, `SubMulAction`, `MulActionWithZero`, etc. If these need to happen, that can occur at a later time. 5. does *not* rename `SemigroupAction` to `MulAction`. Even if this rename is desired, because of the prevalence of `MulAction` in Mathlib, I think we should not conduct a move of this magnitude all at once. If we want to rename this to `MulAction`, we should wait for the 6 month embargo period during which time that name is deprecated, to give everyone downstream the opportunity to switch instead of silently breaking their builds. Of course, another potential name is `MulOneAction`, but I don't think that's too helpful. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict 3623/1862 Mathlib/Algebra/AddConstMap/Basic.lean,Mathlib/Algebra/AddTorsor/Basic.lean,Mathlib/Algebra/AddTorsor/Defs.lean,Mathlib/Algebra/Algebra/Equiv.lean,Mathlib/Algebra/Algebra/NonUnitalHom.lean,Mathlib/Algebra/Algebra/Subalgebra/Basic.lean,Mathlib/Algebra/Algebra/Subalgebra/Pointwise.lean,Mathlib/Algebra/Algebra/Tower.lean,Mathlib/Algebra/Algebra/Unitization.lean,Mathlib/Algebra/BigOperators/Group/Finset/Basic.lean,Mathlib/Algebra/BigOperators/Group/Finset/Defs.lean,Mathlib/Algebra/BigOperators/Group/Finset/Pi.lean,Mathlib/Algebra/BigOperators/Group/Finset/Preimage.lean,Mathlib/Algebra/BigOperators/GroupWithZero/Action.lean,Mathlib/Algebra/Category/ModuleCat/ChangeOfRings.lean,Mathlib/Algebra/Category/ModuleCat/FilteredColimits.lean,Mathlib/Algebra/Colimit/DirectLimit.lean,Mathlib/Algebra/Field/Action/ConjAct.lean,Mathlib/Algebra/Field/Subfield/Basic.lean,Mathlib/Algebra/FreeMonoid/Basic.lean,Mathlib/Algebra/GradedMonoid.lean,Mathlib/Algebra/GradedMulAction.lean,Mathlib/Algebra/Group/Action/Basic.lean,Mathlib/Algebra/Group/Action/Defs.lean,Mathlib/Algebra/Group/Action/End.lean,Mathlib/Algebra/Group/Action/Equidecomp.lean,Mathlib/Algebra/Group/Action/Faithful.lean,Mathlib/Algebra/Group/Action/Hom.lean,Mathlib/Algebra/Group/Action/Opposite.lean,Mathlib/Algebra/Group/Action/Option.lean,Mathlib/Algebra/Group/Action/Pi.lean,Mathlib/Algebra/Group/Action/Pointwise/Finset.lean,Mathlib/Algebra/Group/Action/Pointwise/Set/Basic.lean,Mathlib/Algebra/Group/Action/Pointwise/Set/Finite.lean,Mathlib/Algebra/Group/Action/Pretransitive.lean,Mathlib/Algebra/Group/Action/Prod.lean,Mathlib/Algebra/Group/Action/Sigma.lean,Mathlib/Algebra/Group/Action/Sum.lean,Mathlib/Algebra/Group/Action/TransferInstance.lean,Mathlib/Algebra/Group/Action/TypeTags.lean,Mathlib/Algebra/Group/Action/Units.lean,Mathlib/Algebra/Group/Conj.lean,Mathlib/Algebra/Group/End.lean,Mathlib/Algebra/Group/Equiv/Finite.lean,Mathlib/Algebra/Group/Nat/Range.lean,Mathlib/Algebra/Group/Pointwise/Finset/Basic.lean,Mathlib/Algebra/Group/Pointwise/Finset/Density.lean,Mathlib/Algebra/Group/Pointwise/Finset/Scalar.lean,Mathlib/Algebra/Group/Pointwise/Set/Basic.lean,Mathlib/Algebra/Group/Pointwise/Set/Card.lean,Mathlib/Algebra/Group/Pointwise/Set/Finite.lean,Mathlib/Algebra/Group/Pointwise/Set/Lattice.lean,Mathlib/Algebra/Group/Pointwise/Set/Scalar.lean,Mathlib/Algebra/Group/Shrink.lean,Mathlib/Algebra/Group/Subgroup/Actions.lean,Mathlib/Algebra/Group/Subgroup/Basic.lean,Mathlib/Algebra/Group/Subgroup/Pointwise.lean,Mathlib/Algebra/Group/Submonoid/Membership.lean,Mathlib/Algebra/Group/Submonoid/MulAction.lean,Mathlib/Algebra/Group/Submonoid/Pointwise.lean,Mathlib/Algebra/Group/TransferInstance.lean,Mathlib/Algebra/Group/TypeTags/Finite.lean,Mathlib/Algebra/GroupWithZero/Action/Basic.lean,Mathlib/Algebra/GroupWithZero/Action/ConjAct.lean,Mathlib/Algebra/GroupWithZero/Action/Defs.lean,Mathlib/Algebra/GroupWithZero/Action/End.lean,Mathlib/Algebra/GroupWithZero/Action/Faithful.lean,Mathlib/Algebra/GroupWithZero/Action/Opposite.lean,Mathlib/Algebra/GroupWithZero/Action/Pi.lean,Mathlib/Algebra/GroupWithZero/Action/Pointwise/Finset.lean,Mathlib/Algebra/GroupWithZero/Action/Pointwise/Set.lean,Mathlib/Algebra/GroupWithZero/Action/Prod.lean,Mathlib/Algebra/GroupWithZero/Action/TransferInstance.lean,Mathlib/Algebra/GroupWithZero/Action/Units.lean,Mathlib/Algebra/GroupWithZero/NonZeroDivisors.lean,Mathlib/Algebra/GroupWithZero/Pointwise/Finset.lean,Mathlib/Algebra/GroupWithZero/Pointwise/Set/Basic.lean,Mathlib/Algebra/GroupWithZero/Pointwise/Set/Card.lean,Mathlib/Algebra/GroupWithZero/Subgroup.lean,Mathlib/Algebra/GroupWithZero/Submonoid/Pointwise.lean,Mathlib/Algebra/GroupWithZero/TransferInstance.lean,Mathlib/Algebra/GroupWithZero/Units/Lemmas.lean,Mathlib/Algebra/Module/Congruence/Defs.lean,Mathlib/Algebra/Module/Defs.lean,Mathlib/Algebra/Module/Equiv/Basic.lean,Mathlib/Algebra/Module/GradedModule.lean,Mathlib/Algebra/Module/LinearMap/Defs.lean,Mathlib/Algebra/Module/LinearMap/End.lean,Mathlib/Algebra/Module/PUnit.lean,Mathlib/Algebra/Module/PointwisePi.lean,Mathlib/Algebra/Module/Rat.lean,Mathlib/Algebra/Module/RingHom.lean,Mathlib/Algebra/Module/Submodule/Basic.lean,Mathlib/Algebra/Module/Submodule/Defs.lean,Mathlib/Algebra/Module/Submodule/Invariant.lean,Mathlib/Algebra/Module/Submodule/LinearMap.lean,Mathlib/Algebra/Module/Submodule/Pointwise.lean,Mathlib/Algebra/Module/ULift.lean,Mathlib/Algebra/Order/Group/Action.lean,Mathlib/Algebra/Order/Group/Action/End.lean 349 3 ['github-actions', 'mathlib4-merge-conflict-bot'] nobody
157-44118
5 months ago
158-49033
158 days ago
2-52776
2 days
32717 adomani
author:adomani
 perf: small speed up of the flexible linter This just rearranges an array accumulation. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-linter merge-conflict 7/8 Mathlib/Tactic/Linter/FlexibleLinter.lean 1 4 ['adomani', 'github-actions', 'leanprover-radar', 'mathlib4-merge-conflict-bot'] nobody
156-62981
5 months ago
unknown
0-0
0 seconds
25141 eric-wieser
author:eric-wieser
 feat: basis for multilinear maps This attempts to tease an intermediate result out of #11155, which lets us show that multilinear maps are free even if their codomain is not finite. I guess this continues from https://github.com/leanprover-community/mathlib3/pull/10504 and https://github.com/leanprover-community/mathlib3/pull/14199. --- - [ ] depends on: #11155 - [ ] depends on: #25142 - [ ] depends on: #25169 - [ ] depends on: #25166 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-algebra large-import
label:t-algebra$
 507/45 Mathlib.lean,Mathlib/LinearAlgebra/DFinsupp.lean,Mathlib/LinearAlgebra/DFinsupp/PiTensorProduct.lean,Mathlib/LinearAlgebra/DirectSum/Finsupp.lean,Mathlib/LinearAlgebra/DirectSum/PiTensorProduct.lean,Mathlib/LinearAlgebra/Multilinear/Basic.lean,Mathlib/LinearAlgebra/Multilinear/Basis.lean,Mathlib/LinearAlgebra/Multilinear/DFinsupp.lean,Mathlib/LinearAlgebra/Multilinear/DirectSum.lean,Mathlib/LinearAlgebra/Multilinear/FiniteDimensional.lean,Mathlib/LinearAlgebra/Multilinear/Pi.lean 11 4 ['github-actions', 'leanprover-community-bot-assistant', 'mathlib4-dependent-issues-bot'] nobody
156-37481
5 months ago
unknown
0-0
0 seconds
29274 Jlh18
author:Jlh18
 feat(CategoryTheory): HasLimits instance on Grpd Use the free-forgetful adjunction to show that `Grpd` has all limits in `CategoryTheory.Category.Grpd.Limit`, as a reflective subcategory of `Cat`. - [ ] depends on: #29250[Renamings in Grpd file] - [ ] depends on: #29278[Quotient of a groupoid is a groupoid] - [ ] depends on: #29279[Free forgetful adjunction] - [ ] depends on: #29283 --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) file-removed blocked-by-other-PR t-category-theory merge-conflict 243/65 Mathlib.lean,Mathlib/AlgebraicTopology/FundamentalGroupoid/Basic.lean,Mathlib/CategoryTheory/Core.lean,Mathlib/CategoryTheory/Groupoid/FreeGroupoidOfCategory.lean,Mathlib/CategoryTheory/Groupoid/Grpd.lean,Mathlib/CategoryTheory/Groupoid/Grpd/Core.lean,Mathlib/CategoryTheory/Groupoid/Grpd/Free.lean,Mathlib/CategoryTheory/Groupoid/Grpd/Limit.lean,Mathlib/CategoryTheory/Quotient.lean 9 6 ['github-actions', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
156-8493
5 months ago
188-28396
188 days ago
0-8803
2 hours
29283 Jlh18
author:Jlh18
 feat(CategoryTheory): define forgetful-core adjunction between Cat and Grpd * Define `CategoryTheory.Core.functor`: the functor `Cat ⥤ Grpd` that on objects takes the core of a category * Define `CategoryTheory.Core.adjunction`: the adjunction with the forgetful functor `Grpd.forgetToCat` on the left, and the core functor `Core.functor` on the right. * Hence provide an instance that `Grpd.forgetToCat` is coreflective. --- - [x] depends on: #29284 [Extra lemmas in CategoryTheory.Core] --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) file-removed t-category-theory awaiting-author merge-conflict 209/64 Mathlib.lean,Mathlib/AlgebraicTopology/FundamentalGroupoid/Basic.lean,Mathlib/CategoryTheory/Core.lean,Mathlib/CategoryTheory/Groupoid/FreeGroupoidOfCategory.lean,Mathlib/CategoryTheory/Groupoid/Grpd.lean,Mathlib/CategoryTheory/Groupoid/Grpd/Core.lean,Mathlib/CategoryTheory/Groupoid/Grpd/Free.lean 7 25 ['Jlh18', 'dagurtomas', 'github-actions', 'joelriou', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
156-8492
5 months ago
163-7119
163 days ago
13-74712
13 days
33015 thorimur
author:thorimur
 share: stress test plugins via pluginizing Mathlib.Init This PR is only created for conveniently sharing this branch via `gh` for the purpose of experimenting with plugins. There's no plan to make Mathlib.Init a plugin any time soon. :) --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict 999/1080 Mathlib.lean,Mathlib/Algebra/Expr.lean,Mathlib/Algebra/HierarchyDesign.lean,Mathlib/Analysis/CStarAlgebra/ContinuousFunctionalCalculus/Note.lean,Mathlib/CategoryTheory/Category/Init.lean,Mathlib/CategoryTheory/ConcreteCategory/Bundled.lean,Mathlib/Combinatorics/Matroid/Init.lean,Mathlib/Combinatorics/SimpleGraph/Init.lean,Mathlib/Control/Combinators.lean,Mathlib/Control/ULift.lean,Mathlib/Data/Array/Defs.lean,Mathlib/Data/Array/Extract.lean,Mathlib/Data/Finset/Attr.lean,Mathlib/Data/Int/DivMod.lean,Mathlib/Data/Int/Notation.lean,Mathlib/Data/List/Monad.lean,Mathlib/Data/Nat/BinaryRec.lean,Mathlib/Data/Nat/Init.lean,Mathlib/Data/Nat/Notation.lean,Mathlib/Data/Nat/NthRoot/Defs.lean,Mathlib/Data/Set/Defs.lean,Mathlib/Data/String/Defs.lean,Mathlib/Data/Sym/Sym2/Init.lean,Mathlib/Data/UInt.lean,Mathlib/Deprecated/Aliases.lean,Mathlib/Deprecated/Sort.lean,Mathlib/Lean/ContextInfo.lean,Mathlib/Lean/CoreM.lean,Mathlib/Lean/Elab/InfoTree.lean,Mathlib/Lean/Elab/Tactic/Meta.lean,Mathlib/Lean/Elab/Term.lean,Mathlib/Lean/EnvExtension.lean,Mathlib/Lean/Environment.lean,Mathlib/Lean/Exception.lean,Mathlib/Lean/Expr/Basic.lean,Mathlib/Lean/Expr/Rat.lean,Mathlib/Lean/GoalsLocation.lean,Mathlib/Lean/Json.lean,Mathlib/Lean/LinterCopies.lean,Mathlib/Lean/LinterCopiesTest.lean,Mathlib/Lean/LocalContext.lean,Mathlib/Lean/Meta.lean,Mathlib/Lean/Meta/Basic.lean,Mathlib/Lean/Meta/DiscrTree.lean,Mathlib/Lean/Meta/KAbstractPositions.lean,Mathlib/Lean/Meta/RefinedDiscrTree/Basic.lean,Mathlib/Lean/Meta/Simp.lean,Mathlib/Lean/Meta/Tactic/Rewrite.lean,Mathlib/Lean/Name.lean,Mathlib/Lean/PrettyPrinter/Delaborator.lean,Mathlib/Lean/Thunk.lean,Mathlib/Logic/Basic.lean,Mathlib/Logic/OpClass.lean,Mathlib/Tactic.lean,Mathlib/Tactic/AdaptationNote.lean,Mathlib/Tactic/ApplyCongr.lean,Mathlib/Tactic/ApplyWith.lean,Mathlib/Tactic/ArithMult/Init.lean,Mathlib/Tactic/Attr/Register.lean,Mathlib/Tactic/Basic.lean,Mathlib/Tactic/Bound/Init.lean,Mathlib/Tactic/CC/Lemmas.lean,Mathlib/Tactic/Cases.lean,Mathlib/Tactic/CasesM.lean,Mathlib/Tactic/CategoryTheory/CategoryStar.lean,Mathlib/Tactic/CategoryTheory/Coherence/Datatypes.lean,Mathlib/Tactic/Change.lean,Mathlib/Tactic/Check.lean,Mathlib/Tactic/Clean.lean,Mathlib/Tactic/ClearExcept.lean,Mathlib/Tactic/ClearExclamation.lean,Mathlib/Tactic/Clear_.lean,Mathlib/Tactic/Coe.lean,Mathlib/Tactic/Common.lean,Mathlib/Tactic/Constructor.lean,Mathlib/Tactic/Continuity/Init.lean,Mathlib/Tactic/Conv.lean,Mathlib/Tactic/Core.lean,Mathlib/Tactic/DepRewrite.lean,Mathlib/Tactic/Eqns.lean,Mathlib/Tactic/ErwQuestion.lean,Mathlib/Tactic/Eval.lean,Mathlib/Tactic/ExistsI.lean,Mathlib/Tactic/Explode/Datatypes.lean,Mathlib/Tactic/ExtendDoc.lean,Mathlib/Tactic/FailIfNoProgress.lean,Mathlib/Tactic/FastInstance.lean,Mathlib/Tactic/FieldSimp/Attr.lean,Mathlib/Tactic/Find.lean,Mathlib/Tactic/FindSyntax.lean,Mathlib/Tactic/Finiteness/Attr.lean,Mathlib/Tactic/FunProp/Decl.lean,Mathlib/Tactic/FunProp/Mor.lean,Mathlib/Tactic/FunProp/ToBatteries.lean,Mathlib/Tactic/GCongr/ForwardAttr.lean,Mathlib/Tactic/Generalize.lean,Mathlib/Tactic/GuardGoalNums.lean,Mathlib/Tactic/GuardHypNums.lean,Mathlib/Tactic/Have.lean,Mathlib/Tactic/HaveI.lean 211 0 [] nobody
156-3346
5 months ago
unknown
0-0
0 seconds
21447 erdOne
author:erdOne
 feat(AlgebraicGeometry): the split algebraic torus --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict awaiting-author t-algebraic-geometry 419/0 Mathlib.lean,Mathlib/AlgebraicGeometry/Torus.lean 2 6 ['erdOne', 'github-actions', 'jcommelin', 'joelriou', 'mathlib4-merge-conflict-bot'] nobody
155-49417
5 months ago
469-1587
469 days ago
2-69252
2 days
32938 0xTerencePrime
author:0xTerencePrime
 feat(Order/LocallyFinite): prove DenselyOrdered and LocallyFiniteOrder are incompatible ## Summary This PR proves that a nontrivial densely ordered linear order cannot be locally finite. ## Main results * `not_locallyFiniteOrder`: A densely ordered locally finite linear order must be subsingleton. * `not_locallyFiniteOrder_of_nontrivial`: The main theorem - incompatibility of the two properties. Note: This implementation imports `Mathlib.Order.Interval.Set.Infinite` to reuse the existing `Set.Icc_infinite` theorem, ensuring standard library consistency. ## Mathematical content The key insight is that in a densely ordered type, we can always find a new element between any two distinct elements. This means any nontrivial interval contains infinitely many elements. However, `LocallyFiniteOrder` requires intervals to be finite. This contradiction implies that such a type cannot exist (unless it is trivial). ## Motivation This resolves a TODO mentioned in #7987 (Data/Finset/LocallyFinite entry). ## Verification - [x] `lake build Mathlib.Order.LocallyFinite.Basic` passes - [x] `lake exe runLinter Mathlib.Order.LocallyFinite.Basic` passes t-order new-contributor awaiting-author 28/0 Mathlib/Order/Interval/Finset/Basic.lean 1 10 ['0xTerencePrime', 'CoolRmal', 'github-actions', 'jcommelin', 'plp127'] nobody
154-46833
5 months ago
154-46873
154 days ago
3-22290
3 days
33077 YaelDillies
author:YaelDillies
 feat(Data/Rel): balls Define `SetRel.ball` and use it in place of `UniformSpace.ball`. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) WIP t-data 38/3 Mathlib/Data/Rel.lean,Mathlib/Topology/UniformSpace/Defs.lean 2 1 ['github-actions'] nobody
154-38818
5 months ago
154-38875
154 days ago
0-9
9 seconds
31226 erdOne
author:erdOne
 chore(RingTheory): add `@[ext]` to `Ideal.Quotient.algHom_ext` See [`Ideal.Quotient.ringHom_ext`](https://leanprover-community.github.io/mathlib4_docs/find/?pattern=Ideal.Quotient.ringHom_ext#doc) which also has @[ext 1100]. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) awaiting-author t-ring-theory easy merge-conflict 3/2 Mathlib/RingTheory/Extension/Presentation/Core.lean,Mathlib/RingTheory/Ideal/Quotient/Operations.lean 2 7 ['erdOne', 'github-actions', 'j-loreaux', 'mathlib4-merge-conflict-bot'] nobody
154-28495
5 months ago
197-14196
197 days ago
3-12761
3 days
21495 alreadydone
author:alreadydone
 experiment: reducible HasQuotient.quotient' --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) WIP merge-conflict 2/0 Mathlib/Algebra/Quotient.lean 1 2 ['github-actions', 'mathlib4-merge-conflict-bot'] nobody
154-13814
5 months ago
470-36644
470 days ago
0-200
3 minutes
32698 farruhx
author:farruhx
 feat(List): add aesop / simp annotations to selected lemmas for improved automation This PR adds `@[aesop safe]` and `@[simp]` annotations to a set of List lemmas whose proofs are routine and benefit from standardized automation. No statements or definitions are changed; only proof annotations are added. The lemmas updated in this PR are: * `or_exists_of_exists_mem_cons` * `append_subset_of_subset_of_subset` * `map_subset_iff` * `append_eq_has_append` * `append_right_injective` * `append_left_injective` * `reverse_surjective` * `reverse_bijective` * `mem_getLast?_append_of_mem_getLast?` * `mem_dropLast_of_mem_of_ne_getLast` * `idxOf_eq_length_iff` * `idxOf_append_of_mem` * `length_eraseP_add_one` The goal is to make these commonly used lemmas easier for `aesop`-based automation to resolve, while avoiding any interference with simp-normal-form lemmas or canonical rewrite rules. There are no API changes and no new theorems—only improved automation behavior. t-data new-contributor awaiting-author 18/1 Mathlib/Data/List/Basic.lean 1 8 ['artie2000', 'euprunin', 'farruhx', 'github-actions'] pechersky
assignee:pechersky
153-81602
5 months ago
153-81602
153 days ago
7-31364
7 days
29203 Hagb
author:Hagb
 feat(RingTheory/MvPolynomial/Groebner): add Gröbner basis This PR adds some definitions and theorems of Gröbner basis theory. Definitions: - `MonomialOrder.IsRemainder` - `MonomialOrder.IsGroebnerBasis` Main theorems: * `MonomialOrder.remainder_eq_zero_iff_mem_ideal_of_isGroebnerBasis`: Given a remainder of a polynomial on division by a Gröbner basis of an ideal, the remainder is 0 if and only if the polynomial is in the ideal. * `MonomialOrder.isGroebnerBasis_iff_subset_ideal_and_isRemainder_zero`: A finite set of polynomials is a Gröbner basis of an ideal if and only if it is a subset of this ideal and 0 is a remainder of each member of this ideal on division by this finite set. * `MonomialOrder.existsUnique_isRemainder_of_isGroebnerBasis`: Remainder of any polynomial on division by a Gröbner basis exists and is unique. * `MonomialOrder.ideal_eq_span_of_isGroebnerBasis`: Gröbner basis of any ideal spans the ideal. * `MonomialOrder.isGroebnerBasis_iff_isRemainder_sPolynomial_zero` (Buchberger Criterion): a basis of an ideal is a Gröbner basis of it if and only if 0 is a remainder of echo sPolynomial between two polynomials on the basis. The previous `Mathlib/RingTheory/MvPolynomial/Groebner.lean` is moved to `Mathlib/RingTheory/MvPolynomial/Groebner/Division.lean`, and used by `Mathlib/RingTheory/MvPolynomial/Groebner/Remainder.lean` for the proof of remainder's existence. The PR is upstreamized from https://github.com/WuProver/groebner_proj. Co-authored-by: Hao Shen [3118181069@qq.com](mailto:3118181069@qq.com) --- CC @tsuki8 TODO / WIP: - [x] clean up some proofs - [x] split lemmas - [x] squeeze Non-terminal `simp`s - [x] add comments to explain the proof of Buchberger Criterion. - [x] refactor something with `WithBot (σ →₀ ℕ)` variant of `MonomialOrder.degree` (`MonomialOrder.withBotDegree`, #34759). - [x] refactor to use namespaces `MonomialOrder.{IsGroebnerBasis,IsRemainder}` instead of `*_of_{isGroebnerBasis,isRemainder}` in theorem names. - [ ] reduced Groebner Basis (done, not yet submitted) - [x] refactor to avoid too many `IsUnit` or `nonZeroDivisors` - [x] split `IsRemainder` and `IsGroebnerBasis` - [ ] embedding of monomial order (done, not yet submitted), and properties about it and Groebner basis. - [ ] some theorems can be generalized to avoid requiring `IsUnit` Dependencies: - [x] depends on: #26039 - [ ] depends on: #34759 S-polynomial and other lemmas in other files are split from this PR, leaving only changes of `Mathlib/RingTheory/MvPolynomial/Groebner{.lean,/*.lean}` in this PR. The following are PRs split from this PR. - [x] depends on: #32336 - [x] depends on: #32344 - [x] depends on: #32780 - [x] depends on: #32787 - [x] depends on: #32788 - [x] depends on: #32801 - [x] depends on: #32876 - [x] depends on: #32877 - [ ] depends on: #34873 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-ring-theory large-import blocked-by-other-PR WIP merge-conflict awaiting-author 1649/220 Mathlib.lean,Mathlib/Algebra/Order/Monoid/Unbundled/WithTop.lean,Mathlib/Combinatorics/Matroid/Closure.lean,Mathlib/Combinatorics/Nullstellensatz.lean,Mathlib/Data/Finsupp/Basic.lean,Mathlib/Data/Finsupp/MonomialOrder.lean,Mathlib/Logic/Basic.lean,Mathlib/RingTheory/MvPolynomial/Groebner.lean,Mathlib/RingTheory/MvPolynomial/Groebner/Division.lean,Mathlib/RingTheory/MvPolynomial/Groebner/Groebner.lean,Mathlib/RingTheory/MvPolynomial/Groebner/Remainder.lean,Mathlib/RingTheory/MvPolynomial/MonomialOrder.lean,docs/references.bib 5 21 ['Hagb', 'SnirBroshi', 'erdOne', 'github-actions', 'jcommelin', 'mathlib-merge-conflicts', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] alreadydone and erdOne
assignee:alreadydone assignee:erdOne
153-71852
5 months ago
153-71902
153 days ago
3-68616
3 days
27817 zhuyizheng
author:zhuyizheng
 feat: add IMO2025P1 Add a solution to IMO2025P1, the original problem statement from https://github.com/jsm28/IMOLean --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) IMO awaiting-author new-contributor merge-conflict 1310/0 Archive.lean,Archive/Imo/Imo2025Q1.lean 2 9 ['github-actions', 'kim-em', 'mathlib4-merge-conflict-bot', 'zhuyizheng'] dwrensha
assignee:dwrensha
153-27399
5 months ago
212-78367
212 days ago
59-36769
59 days
33157 wwylele
author:wwylele
 feat(Combinatorics): partitions and pentagonal numbers --- - [ ] depends on: #33143 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) blocked-by-other-PR merge-conflict 506/1 Mathlib.lean,Mathlib/Algebra/BigOperators/Ring/Finset.lean,Mathlib/Combinatorics/Enumerative/Partition/Basic.lean,Mathlib/Combinatorics/Enumerative/Partition/Pentagonal.lean,Mathlib/RingTheory/PowerSeries/Pentagonal.lean,Mathlib/Topology/Algebra/InfiniteSum/Pentagonal.lean,Mathlib/Topology/Algebra/InfiniteSum/Ring.lean,docs/1000.yaml 8 3 ['github-actions', 'mathlib-merge-conflicts', 'mathlib4-dependent-issues-bot'] nobody
152-26889
5 months ago
unknown
0-0
0 seconds
32497 themathqueen
author:themathqueen
 chore: make `FiniteDimensional.complete 𝕜` an instance when `𝕜` is `RCLike` --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-analysis awaiting-bench 3/26 Mathlib/Analysis/InnerProductSpace/Adjoint.lean,Mathlib/Analysis/InnerProductSpace/Positive.lean 2 3 ['github-actions', 'leanprover-radar', 'themathqueen'] nobody
150-71799
4 months ago
unknown
0-0
0 seconds
33218 Blackfeather007
author:Blackfeather007
 feat(Algebra): Define the associated graded ring to filtered ring Define the associated graded ring to a filtered ring. --- - [ ] depends on: #33217 migrated from https://github.com/leanprover-community/mathlib4/pull/26858 t-ring-theory new-contributor blocked-by-other-PR 450/0 Mathlib.lean,Mathlib/RingTheory/FilteredAlgebra/AssociatedGraded.lean 2 2 ['github-actions', 'mathlib4-dependent-issues-bot'] nobody
150-60064
4 months ago
150-65349
150 days ago
0-132
2 minutes
33219 Blackfeather007
author:Blackfeather007
 feat(Algebra): Define associated graded algebra Define the associated graded algebra of a filtered algebra, constructed from a special case of associated graded ring. --- - [ ] depends on: #33218 migrated from #26859 t-ring-theory new-contributor blocked-by-other-PR 563/0 Mathlib.lean,Mathlib/RingTheory/FilteredAlgebra/AssociatedGraded.lean 2 2 ['github-actions', 'mathlib4-dependent-issues-bot'] nobody
150-59956
4 months ago
150-65123
150 days ago
0-133
2 minutes
33220 Blackfeather007
author:Blackfeather007
 feat(Algebra): Define associated graded module Define the associated graded module to a filtered module. --- - [ ] depends on: #33218 migrated from #26860 t-ring-theory new-contributor blocked-by-other-PR 669/0 Mathlib.lean,Mathlib/RingTheory/FilteredAlgebra/AssociatedGraded.lean 2 2 ['github-actions', 'mathlib4-dependent-issues-bot'] nobody
150-59872
4 months ago
150-64935
150 days ago
0-137
2 minutes
33227 Blackfeather007
author:Blackfeather007
 feat(Algebra): exact of associated graded exact We proved that a chain complex is exact if its associated graded complex is exact. Co-authored-by: Huanyu Zheng @Yu-Misaka [suzuka@misaka-yu.com](mailto:suzuka@misaka-yu.com) Co-authored-by: Yi Yuan @yuanyi-350 [kysyy1@126.com](mailto:kysyy1@126.com) Co-authored-by: Weichen Jiao @AlbertJ-314 [albertjiao314@gmail.com](mailto:albertjiao314@gmail.com) --- - [ ] depends on: #33226 migrated from #26869 t-ring-theory new-contributor blocked-by-other-PR 728/0 Mathlib.lean,Mathlib/RingTheory/FilteredAlgebra/AssociatedGraded.lean,Mathlib/RingTheory/FilteredAlgebra/Exactness.lean,Mathlib/RingTheory/FilteredAlgebra/FilteredHom.lean 4 2 ['github-actions', 'mathlib4-dependent-issues-bot'] nobody
150-57544
4 months ago
150-57545
150 days ago
0-1208
20 minutes
33226 Blackfeather007
author:Blackfeather007
 feat(Algebra): associated graded exact of exact and strict In this file, we define the concept of exhaustive filtrations. We also prove a AssociatedGradedRingHom sequence is exact iff each GradedPieceHom is exact. And when a sequence is strict exact, the corresponding AssociatedGradedRingHom sequence is also exact. Co-authored-by: Huanyu Zheng @Yu-Misaka [suzuka@misaka-yu.com](mailto:suzuka@misaka-yu.com) Co-authored-by: Yi Yuan @yuanyi-350 [kysyy1@126.com](mailto:kysyy1@126.com) Co-authored-by: Weichen Jiao @AlbertJ-314 [albertjiao314@gmail.com](mailto:albertjiao314@gmail.com) --- - [ ] depends on: #33222 migrated from #26868 t-ring-theory new-contributor blocked-by-other-PR 529/0 Mathlib.lean,Mathlib/RingTheory/FilteredAlgebra/AssociatedGraded.lean,Mathlib/RingTheory/FilteredAlgebra/Exactness.lean,Mathlib/RingTheory/FilteredAlgebra/FilteredHom.lean 4 2 ['github-actions', 'mathlib4-dependent-issues-bot'] nobody
150-57542
4 months ago
150-57543
150 days ago
0-1307
21 minutes
33225 Blackfeather007
author:Blackfeather007
 feat(Algebra): filtered module hom In this PR we defined the filtered semi-linear map for filtered module and the associated graded module hom. --- - [ ] depends on: #33220 - [ ] depends on: #33223 migrated from #26867 t-ring-theory new-contributor blocked-by-other-PR 1205/0 Mathlib.lean,Mathlib/RingTheory/FilteredAlgebra/AssociatedGraded.lean,Mathlib/RingTheory/FilteredAlgebra/FilteredHom.lean 3 2 ['github-actions', 'mathlib4-dependent-issues-bot'] nobody
150-57541
4 months ago
150-57542
150 days ago
0-1805
30 minutes
33224 Blackfeather007
author:Blackfeather007
 feat(Algebra): define filtered alghom In this PR, we define the filtered algebra homomorphisms on algebras and prove some basic properties of them. --- - [ ] depends on: #33219 - [ ] depends on: #33223 migrated from #26863 t-ring-theory new-contributor blocked-by-other-PR 1055/0 Mathlib.lean,Mathlib/RingTheory/FilteredAlgebra/AssociatedGraded.lean,Mathlib/RingTheory/FilteredAlgebra/FilteredHom.lean 3 2 ['github-actions', 'mathlib4-dependent-issues-bot'] nobody
150-57539
4 months ago
150-57540
150 days ago
0-2046
34 minutes
33223 Blackfeather007
author:Blackfeather007
 feat(Algebra): define filtered ring homomorphism In this PR, we define the filtered ring morphisms on rings and prove some basic properties of them. Co-authored-by: Huanyu Zheng @Yu-Misaka [suzuka@misaka-yu.com](mailto:suzuka@misaka-yu.com) Co-authored-by: Yi Yuan @yuanyi-350 [kysyy1@126.com](mailto:kysyy1@126.com) Co-authored-by: Weichen Jiao @AlbertJ-314 [albertjiao314@gmail.com](mailto:albertjiao314@gmail.com) --- - [ ] depends on: #33218 - [ ] depends on: #33222 migrated from #26862 t-ring-theory new-contributor blocked-by-other-PR 824/0 Mathlib.lean,Mathlib/RingTheory/FilteredAlgebra/AssociatedGraded.lean,Mathlib/RingTheory/FilteredAlgebra/FilteredHom.lean 3 2 ['github-actions', 'mathlib4-dependent-issues-bot'] nobody
150-57536
4 months ago
150-57539
150 days ago
0-2257
37 minutes
33222 Blackfeather007
author:Blackfeather007
 feat(Algebra): define filtered add group hom In this file we define filtered hom and the corresponding associated graded hom for abelian groups. Co-authored-by: Huanyu Zheng @Yu-Misaka [suzuka@misaka-yu.com](mailto:suzuka@misaka-yu.com) Co-authored-by: Yi Yuan @yuanyi-350 [kysyy1@126.com](mailto:kysyy1@126.com) Co-authored-by: Weichen Jiao @AlbertJ-314 [albertjiao314@gmail.com](mailto:albertjiao314@gmail.com) --- - [ ] depends on: #33217 migrated from #26861 new-contributor t-ring-theory blocked-by-other-PR 368/0 Mathlib.lean,Mathlib/RingTheory/FilteredAlgebra/AssociatedGraded.lean,Mathlib/RingTheory/FilteredAlgebra/FilteredHom.lean 3 2 ['github-actions', 'mathlib4-dependent-issues-bot'] nobody
150-57535
4 months ago
150-57536
150 days ago
0-2249
37 minutes
33134 faenuccio
author:faenuccio
 feat(Normed/Module/WeakDual): add Goldstine lemma We add Goldstine lemma stating that the weak*-closure of the image in the double dual of the unit ball coincides with the unit ball. As a corollary we derive that the image of `inclusionInDoubleDual` is weak*-dense. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) WIP t-analysis merge-conflict 148/3 Mathlib/Analysis/Normed/Module/WeakDual.lean,Mathlib/Topology/Algebra/Module/WeakDual.lean,docs/references.bib 3 3 ['github-actions', 'mathlib-merge-conflicts'] nobody
150-11923
4 months ago
153-11151
153 days ago
0-16
16 seconds
33269 urkud
author:urkud
 feat(MeasureTheory/Covering): generalize some lemmas to outer measures --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-measure-probability 29/19 Mathlib/MeasureTheory/Covering/Differentiation.lean,Mathlib/MeasureTheory/Covering/VitaliFamily.lean 2 1 ['github-actions'] nobody
148-59447
4 months ago
148-59488
148 days ago
0-30
30 seconds
33138 gasparattila
author:gasparattila
 chore(MeasureTheory/Measure/Stieltjes): remove `backward.privateInPublic` In #32482, some definitions in this file were rewritten using private declarations. However, this made `StieltjesFunction.length` unusable, since its API uses private declarations even in statements. This PR fixes this by problem by specializing `length_eq` to `NoMinOrder` and adding a new lemma for the `OrderBot` case. The other lemmas involving the private declarations are made private, except for `length_subadditive_Icc_Ioo`, which is reverted to the previous statement. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-measure-probability tech debt awaiting-author 35/30 Mathlib/MeasureTheory/Measure/Stieltjes.lean 1 6 ['github-actions', 'grunweg', 'sgouezel', 'vihdzp'] sgouezel
assignee:sgouezel
148-376
4 months ago
148-376
148 days ago
5-1594
5 days
33307 grunweg
author:grunweg
 Orientable manifolds updated --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) WIP t-differential-geometry 377/4 Mathlib.lean,Mathlib/Geometry/Manifold/Instances/Real.lean,Mathlib/Geometry/Manifold/Orientable.lean 3 2 ['github-actions'] nobody
147-31288
4 months ago
unknown
0-0
0 seconds
5934 eric-wieser
author:eric-wieser
 feat: port Data.Rat.MetaDefs --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) This needs some eyes from people familiar with Qq merge-conflict help-wanted mathlib-port t-meta 183/0 Mathlib.lean,Mathlib/Data/Rat/MetaDefs.lean,test/rat.lean 3 5 ['eric-wieser', 'gebner', 'vihdzp'] nobody
147-11233
4 months ago
unknown
0-0
0 seconds
4960 eric-wieser
author:eric-wieser
 chore: use `open scoped` Earlier versions of mathport did not know about this. This was done by searching for all `open` commands referencing: * `Classical` * `BigOperators` * `Topology` * `Pointwise` --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict awaiting-CI 1026/981 Mathlib/Algebra/AddTorsor.lean,Mathlib/Algebra/Algebra/Basic.lean,Mathlib/Algebra/Algebra/Equiv.lean,Mathlib/Algebra/Algebra/Hom.lean,Mathlib/Algebra/Algebra/Operations.lean,Mathlib/Algebra/Algebra/Subalgebra/Basic.lean,Mathlib/Algebra/Algebra/Subalgebra/Pointwise.lean,Mathlib/Algebra/Algebra/Subalgebra/Tower.lean,Mathlib/Algebra/Algebra/Tower.lean,Mathlib/Algebra/BigOperators/Associated.lean,Mathlib/Algebra/BigOperators/Basic.lean,Mathlib/Algebra/BigOperators/Fin.lean,Mathlib/Algebra/BigOperators/Finprod.lean,Mathlib/Algebra/BigOperators/Finsupp.lean,Mathlib/Algebra/BigOperators/Intervals.lean,Mathlib/Algebra/BigOperators/NatAntidiagonal.lean,Mathlib/Algebra/BigOperators/Option.lean,Mathlib/Algebra/BigOperators/Order.lean,Mathlib/Algebra/BigOperators/Pi.lean,Mathlib/Algebra/BigOperators/Ring.lean,Mathlib/Algebra/BigOperators/RingEquiv.lean,Mathlib/Algebra/Bounds.lean,Mathlib/Algebra/Category/GroupCat/Biproducts.lean,Mathlib/Algebra/Category/GroupCat/FilteredColimits.lean,Mathlib/Algebra/Category/GroupCat/Injective.lean,Mathlib/Algebra/Category/ModuleCat/Adjunctions.lean,Mathlib/Algebra/Category/ModuleCat/Biproducts.lean,Mathlib/Algebra/Category/Mon/FilteredColimits.lean,Mathlib/Algebra/Category/Ring/Adjunctions.lean,Mathlib/Algebra/Category/Ring/FilteredColimits.lean,Mathlib/Algebra/CharP/Basic.lean,Mathlib/Algebra/CharP/Two.lean,Mathlib/Algebra/DirectLimit.lean,Mathlib/Algebra/DirectSum/Basic.lean,Mathlib/Algebra/DirectSum/Decomposition.lean,Mathlib/Algebra/DirectSum/Internal.lean,Mathlib/Algebra/DirectSum/Ring.lean,Mathlib/Algebra/EuclideanDomain/Defs.lean,Mathlib/Algebra/Field/Defs.lean,Mathlib/Algebra/GCDMonoid/Div.lean,Mathlib/Algebra/GeomSum.lean,Mathlib/Algebra/GroupWithZero/Basic.lean,Mathlib/Algebra/GroupWithZero/Commute.lean,Mathlib/Algebra/GroupWithZero/Units/Basic.lean,Mathlib/Algebra/Homology/Additive.lean,Mathlib/Algebra/Homology/ComplexShape.lean,Mathlib/Algebra/Homology/Homology.lean,Mathlib/Algebra/Homology/Homotopy.lean,Mathlib/Algebra/Homology/HomotopyCategory.lean,Mathlib/Algebra/Homology/ImageToKernel.lean,Mathlib/Algebra/IndicatorFunction.lean,Mathlib/Algebra/LinearRecurrence.lean,Mathlib/Algebra/Module/BigOperators.lean,Mathlib/Algebra/Module/GradedModule.lean,Mathlib/Algebra/Module/LinearMap.lean,Mathlib/Algebra/Module/PointwisePi.lean,Mathlib/Algebra/Module/Submodule/Basic.lean,Mathlib/Algebra/Module/Submodule/Bilinear.lean,Mathlib/Algebra/Module/Submodule/Lattice.lean,Mathlib/Algebra/Module/Submodule/Pointwise.lean,Mathlib/Algebra/Module/Torsion.lean,Mathlib/Algebra/MonoidAlgebra/Basic.lean,Mathlib/Algebra/MonoidAlgebra/Degree.lean,Mathlib/Algebra/Order/Chebyshev.lean,Mathlib/Algebra/Order/Module.lean,Mathlib/Algebra/Order/Pointwise.lean,Mathlib/Algebra/Order/Rearrangement.lean,Mathlib/Algebra/Order/SMul.lean,Mathlib/Algebra/Order/UpperLower.lean,Mathlib/Algebra/Periodic.lean,Mathlib/Algebra/Polynomial/BigOperators.lean,Mathlib/Algebra/Polynomial/GroupRingAction.lean,Mathlib/Algebra/Star/BigOperators.lean,Mathlib/Algebra/Star/Pointwise.lean,Mathlib/Algebra/Star/Subalgebra.lean,Mathlib/Algebra/Support.lean,Mathlib/Algebra/TrivSqZeroExt.lean,Mathlib/Algebra/Tropical/BigOperators.lean,Mathlib/AlgebraicGeometry/PrimeSpectrum/Basic.lean,Mathlib/AlgebraicGeometry/PrimeSpectrum/Maximal.lean,Mathlib/AlgebraicGeometry/ProjectiveSpectrum/Topology.lean,Mathlib/AlgebraicTopology/AlternatingFaceMapComplex.lean,Mathlib/AlgebraicTopology/ExtraDegeneracy.lean,Mathlib/AlgebraicTopology/TopologicalSimplex.lean,Mathlib/Analysis/Analytic/Basic.lean,Mathlib/Analysis/Asymptotics/AsymptoticEquivalent.lean,Mathlib/Analysis/Asymptotics/Asymptotics.lean,Mathlib/Analysis/Asymptotics/SpecificAsymptotics.lean,Mathlib/Analysis/Asymptotics/SuperpolynomialDecay.lean,Mathlib/Analysis/Asymptotics/Theta.lean,Mathlib/Analysis/BoxIntegral/Box/Basic.lean,Mathlib/Analysis/BoxIntegral/Box/SubboxInduction.lean,Mathlib/Analysis/BoxIntegral/Partition/Additive.lean,Mathlib/Analysis/BoxIntegral/Partition/Basic.lean,Mathlib/Analysis/BoxIntegral/Partition/Filter.lean,Mathlib/Analysis/BoxIntegral/Partition/Split.lean,Mathlib/Analysis/BoxIntegral/Partition/SubboxInduction.lean,Mathlib/Analysis/BoxIntegral/Partition/Tagged.lean,Mathlib/Analysis/Calculus/ContDiffDef.lean,Mathlib/Analysis/Calculus/Deriv/Add.lean 788 1 ['vihdzp'] nobody
147-11130
4 months ago
1076-82260
1076 days ago
0-753
12 minutes
4127 kmill
author:kmill
 refactor: create HasAdj class, define Digraph, and generalize some SimpleGraph API --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict awaiting-author t-combinatorics 1403/551 Mathlib.lean,Mathlib/Combinatorics/Digraph/Basic.lean,Mathlib/Combinatorics/Graph/Classes.lean,Mathlib/Combinatorics/Graph/Dart.lean,Mathlib/Combinatorics/Graph/Hom.lean,Mathlib/Combinatorics/SimpleGraph/AdjMatrix.lean,Mathlib/Combinatorics/SimpleGraph/Basic.lean,Mathlib/Combinatorics/SimpleGraph/Clique.lean,Mathlib/Combinatorics/SimpleGraph/Coloring.lean,Mathlib/Combinatorics/SimpleGraph/Connectivity.lean,Mathlib/Combinatorics/SimpleGraph/DegreeSum.lean,Mathlib/Combinatorics/SimpleGraph/Density.lean,Mathlib/Combinatorics/SimpleGraph/Ends/Defs.lean,Mathlib/Combinatorics/SimpleGraph/Finsubgraph.lean,Mathlib/Combinatorics/SimpleGraph/Hasse.lean,Mathlib/Combinatorics/SimpleGraph/Prod.lean,Mathlib/Combinatorics/SimpleGraph/StronglyRegular.lean,Mathlib/Combinatorics/SimpleGraph/Subgraph.lean 18 2 ['SnirBroshi', 'vihdzp'] nobody
147-7105
4 months ago
1090-26946
1090 days ago
8-43930
8 days
32264 jjtowery
author:jjtowery
 feat(Bicategory): add lax slice bicategory --- In this PR, I define the lax slice bicategory for a lax functor over an object. I also give the change of slice strict pseudofunctor. These are from Section 7.1 of Johnson & Yau and are essential for their Whitehead theorem for bicategories (lax functor biequivalence iff essentially surjective, essentially full, and fully faithful), which I'd like to prove at some point. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-category-theory new-contributor awaiting-author 527/0 Mathlib.lean,Mathlib/CategoryTheory/Bicategory/LaxSlice.lean 2 12 ['dagurtomas', 'github-actions', 'jjtowery', 'robin-carlier'] dagurtomas
assignee:dagurtomas
146-86021
4 months ago
170-3078
170 days ago
3-47959
3 days
27752 plp127
author:plp127
 feat(Order): `NoBotOrder α` implies `NoMinOrder α` under `IsDirected α (· ≥ ·)` This PR continues the work from #24266. Original PR: https://github.com/leanprover-community/mathlib4/pull/24266 awaiting-author t-order merge-conflict 14/0 Mathlib/Order/Directed.lean 1 5 ['github-actions', 'j-loreaux', 'mathlib4-merge-conflict-bot', 'plp127'] nobody
146-77238
4 months ago
295-24463
295 days ago
0-2869
47 minutes
32921 faenuccio
author:faenuccio
 refactor Submodule.map Following [#mathlib4 > on the definition of Submodule.map](https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/on.20the.20definition.20of.20Submodule.2Emap/with/563900347) this PR refactors the definition of `Submodule.map` removing the requirement that the underlying ring homomorphism be surjective. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) WIP awaiting-author t-algebra merge-conflict
label:t-algebra$
 32/20 Mathlib/Algebra/Module/Submodule/Map.lean 1 3 ['github-actions', 'mathlib4-merge-conflict-bot'] nobody
146-35201
4 months ago
158-10491
158 days ago
0-1
1 second
32889 artie2000
author:artie2000
 feat(Algebra): forgetful lemmas for `map` and `comap` on substructures * Standardise the form of forgetful lemmas for `map` and `comap` (ie, `(co)map_toSubfoo`) * Add missing lemmas of this form * Mark all such lemmas as `simp` --- - [x] depends on: #21031 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra awaiting-author merge-conflict blocked-by-other-PR
label:t-algebra$
 72/17 Mathlib/Algebra/Algebra/NonUnitalSubalgebra.lean,Mathlib/Algebra/Algebra/Subalgebra/Basic.lean,Mathlib/Algebra/Group/Subgroup/Map.lean,Mathlib/Algebra/Module/Submodule/Map.lean,Mathlib/Algebra/Ring/Subsemiring/Basic.lean,Mathlib/Algebra/Star/Subalgebra.lean 6 30 ['YaelDillies', 'artie2000', 'github-actions', 'mathlib-dependent-issues', 'mathlib4-merge-conflict-bot', 'vihdzp'] nobody
146-28729
4 months ago
156-3276
156 days ago
2-56660
2 days
32960 dleijnse
author:dleijnse
 feat(FieldTheory): adjoin pth roots For a field `k` of exponential characteristic `p` and a subset `S` of `k`, we define the extension of `k` obtained by adjoining all `p`-th roots of elements of `S`. We prove that this is a purely inseparable extension, and provide some basic API. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra new-contributor awaiting-author
label:t-algebra$
 131/0 Mathlib.lean,Mathlib/FieldTheory/PurelyInseparable/AdjoinPthRoots.lean 2 13 ['artie2000', 'chrisflav', 'dleijnse', 'erdOne', 'github-actions', 'leanprover-radar'] erdOne
assignee:erdOne
146-16273
4 months ago
146-16273
146 days ago
10-12739
10 days
33163 Aaron1011
author:Aaron1011
 feat: prove subgroup of (M -> Z) is finitely generated --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-ring-theory new-contributor awaiting-author 5/0 Mathlib/RingTheory/DedekindDomain/Dvr.lean 1 2 ['erdOne', 'github-actions'] alreadydone
assignee:alreadydone
146-9223
4 months ago
146-9223
146 days ago
5-81520
5 days
28972 themathqueen
author:themathqueen
 feat(LinearAlgebra/Matrix): star-algebra automorphisms on matrices are unitarily inner Characterization of star-algebra automorphisms on matrices: for any star-algebra automorphism `f` on matrices, there exists a unitary matrix `U` such that `f x = U * x * star U`. More generally, this shows that given star-homomorphisms `f` and `g` from `B` to a star-algebra `A` and that the centralizer of `range g` is trivial, then `f x = U * g x * U⁻¹` for some invertible element `U` if and only if `f x = U * g x * star U` for some unitary `U`. Then a corollary to this and [AlgEquiv.eq_linearEquivConjAlgEquiv](https://leanprover-community.github.io/mathlib4_docs/Mathlib/LinearAlgebra/GeneralLinearGroup/AlgEquiv.html#AlgEquiv.eq_linearEquivConjAlgEquiv) is that star-algebra automorphisms on matrices are unitarily inner. Another quick corollary to this and [ContinuousAlgEquiv.eq_continuousLinearEquivConjContinuousAlgEquiv](https://leanprover-community.github.io/mathlib4_docs/Mathlib/Analysis/Normed/Operator/ContinuousAlgEquiv.html#ContinuousAlgEquiv.eq_continuousLinearEquivConjContinuousAlgEquiv) is that star-algebra automorphisms on endomorphisms in `ℂ`-Hilbert spaces are unitarily inner. (See #33066 for the more general version of this.) --- - [x] depends on: #28100 - [x] depends on: #28182 - [x] depends on: #28881 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra t-analysis awaiting-author
label:t-algebra$
 138/0 Mathlib.lean,Mathlib/Analysis/Matrix/StarAlgEquiv.lean 2 5 ['github-actions', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot', 'themathqueen'] nobody
145-7406
4 months ago
145-7406
145 days ago
1-44470
1 day
14444 digama0
author:digama0
 fix(GeneralizeProofs): unreachable! bug As [reported on Zulip](https://leanprover.zulipchat.com/#narrow/stream/270676-lean4/topic/Unreachable.20code.20reached.20in.20Lean.204.2E8.2E0/near/449286780). --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict awaiting-author t-meta 1/1 Mathlib/Tactic/GeneralizeProofs.lean 1 6 ['github-actions', 'jcommelin', 'kmill', 'mathlib4-merge-conflict-bot', 'plby'] nobody
144-71921
4 months ago
676-926
676 days ago
10-36842
10 days
25138 chrisflav
author:chrisflav
 chore(RingTheory/Ideal): make `RingHom.ker` take a `RingHom` instead of `RingHomClass` --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra awaiting-author merge-conflict
label:t-algebra$
 317/309 Mathlib/Algebra/Algebra/Equiv.lean,Mathlib/Algebra/Algebra/Hom.lean,Mathlib/Algebra/Algebra/Hom/Rat.lean,Mathlib/Algebra/Algebra/Opposite.lean,Mathlib/Algebra/Algebra/Subalgebra/Operations.lean,Mathlib/Algebra/Algebra/Tower.lean,Mathlib/Algebra/Category/CommAlgCat/FiniteType.lean,Mathlib/Algebra/Lie/CartanExists.lean,Mathlib/Algebra/MonoidAlgebra/Basic.lean,Mathlib/Algebra/MvPolynomial/Equiv.lean,Mathlib/Algebra/MvPolynomial/Eval.lean,Mathlib/Algebra/Polynomial/AlgebraMap.lean,Mathlib/Algebra/Polynomial/Module/AEval.lean,Mathlib/Algebra/RingQuot.lean,Mathlib/AlgebraicGeometry/EllipticCurve/Affine/Basic.lean,Mathlib/AlgebraicGeometry/EllipticCurve/Affine/Formula.lean,Mathlib/AlgebraicGeometry/EllipticCurve/Jacobian/Basic.lean,Mathlib/AlgebraicGeometry/EllipticCurve/Projective/Basic.lean,Mathlib/AlgebraicGeometry/EllipticCurve/VariableChange.lean,Mathlib/AlgebraicGeometry/EllipticCurve/Weierstrass.lean,Mathlib/AlgebraicGeometry/Pullbacks.lean,Mathlib/Combinatorics/Nullstellensatz.lean,Mathlib/FieldTheory/Minpoly/Field.lean,Mathlib/FieldTheory/PurelyInseparable/Tower.lean,Mathlib/LinearAlgebra/Semisimple.lean,Mathlib/LinearAlgebra/TensorProduct/RightExactness.lean,Mathlib/NumberTheory/NumberField/InfinitePlace/Embeddings.lean,Mathlib/RingTheory/AdicCompletion/Algebra.lean,Mathlib/RingTheory/Adjoin/Tower.lean,Mathlib/RingTheory/AdjoinRoot.lean,Mathlib/RingTheory/Algebraic/Basic.lean,Mathlib/RingTheory/Congruence/Hom.lean,Mathlib/RingTheory/Etale/Kaehler.lean,Mathlib/RingTheory/Extension/Cotangent/Basis.lean,Mathlib/RingTheory/Extension/Cotangent/LocalizationAway.lean,Mathlib/RingTheory/Extension/Generators.lean,Mathlib/RingTheory/Extension/Presentation/Basic.lean,Mathlib/RingTheory/Extension/Presentation/Core.lean,Mathlib/RingTheory/FinitePresentation.lean,Mathlib/RingTheory/FiniteStability.lean,Mathlib/RingTheory/Finiteness/NilpotentKer.lean,Mathlib/RingTheory/Ideal/Cotangent.lean,Mathlib/RingTheory/Ideal/Maps.lean,Mathlib/RingTheory/Ideal/Quotient/Operations.lean,Mathlib/RingTheory/IsAdjoinRoot.lean,Mathlib/RingTheory/Jacobson/Ring.lean,Mathlib/RingTheory/Kaehler/Basic.lean,Mathlib/RingTheory/Kaehler/JacobiZariski.lean,Mathlib/RingTheory/LocalRing/ResidueField/Fiber.lean,Mathlib/RingTheory/LocalRing/ResidueField/Ideal.lean,Mathlib/RingTheory/Localization/Algebra.lean,Mathlib/RingTheory/MvPowerSeries/Evaluation.lean,Mathlib/RingTheory/Nilpotent/Lemmas.lean,Mathlib/RingTheory/NoetherNormalization.lean,Mathlib/RingTheory/Nullstellensatz.lean,Mathlib/RingTheory/Polynomial/Basic.lean,Mathlib/RingTheory/Polynomial/UniqueFactorization.lean,Mathlib/RingTheory/Polynomial/UniversalFactorizationRing.lean,Mathlib/RingTheory/Smooth/AdicCompletion.lean,Mathlib/RingTheory/Smooth/Basic.lean,Mathlib/RingTheory/Smooth/Flat.lean,Mathlib/RingTheory/Smooth/Kaehler.lean,Mathlib/RingTheory/Smooth/NoetherianDescent.lean,Mathlib/RingTheory/Spectrum/Prime/ChevalleyComplexity.lean,Mathlib/RingTheory/Unramified/Finite.lean,Mathlib/Topology/Algebra/Module/CharacterSpace.lean,Mathlib/Topology/ContinuousMap/Ideals.lean,Mathlib/Topology/ContinuousMap/StoneWeierstrass.lean 68 8 ['chrisflav', 'erdOne', 'eric-wieser', 'github-actions', 'jcommelin', 'leanprover-community-bot-assistant', 'mathlib4-merge-conflict-bot'] nobody
144-59330
4 months ago
363-76858
363 days ago
0-3642
1 hour
33386 joelriou
author:joelriou
 feat(AlgebraicTopology/SimplicialSet): decidable instances --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebraic-topology WIP RFC 76/0 Mathlib.lean,Mathlib/AlgebraicTopology/SimplicialSet/Decidable.lean 2 1 ['github-actions'] nobody
144-15525
4 months ago
unknown
0-0
0 seconds
33402 AntoineChambert-Loir
author:AntoineChambert-Loir
 feat(LinearAlgebra/Transvection/Generation): prove exceptional case in Dieudonné's theorem Establish the fourth part of Dieudonné's theorem: is a linear equivalence is exceptional, it is the product of `finrank K (V ⧸ e.fixedSubmodule)` transvections and one dilatransvection. --- - [ ] depends on: #33348 - [ ] depends on: #33347 - [ ] depends on: #33387 - [ ] depends on: #33282 - [ ] depends on: #33392 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra blocked-by-other-PR file-removed
label:t-algebra$
 1572/222 Mathlib.lean,Mathlib/LinearAlgebra/Center.lean,Mathlib/LinearAlgebra/LinearIndependent/Lemmas.lean,Mathlib/LinearAlgebra/Transvection/Basic.lean,Mathlib/LinearAlgebra/Transvection/Generation.lean 8 12 ['AntoineChambert-Loir', 'github-actions', 'mathlib-merge-conflicts', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
143-42023
4 months ago
143-42024
143 days ago
0-705
11 minutes
24665 Komyyy
author:Komyyy
 feat(Mathlib/Topology/Metrizable/Uniformity): every uniform space is generated by a family of pseudometrics --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) WIP t-topology merge-conflict 54/0 Mathlib/Topology/Metrizable/Uniformity.lean 1 2 ['github-actions', 'mathlib4-merge-conflict-bot'] nobody
143-2054
4 months ago
380-8996
380 days ago
0-1
1 second
33381 urkud
author:urkud
 feat: add a version of the Schwarz lemma Add a version of the Schwarz lemma that is midway between the original lemma and Pick's version. Use it to show that a function that is separately holomorphic on a polydisc and is bounded on this polydisc must be continuous on it. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) - [ ] depends on: #33368 - [x] depends on: #33362 t-analysis blocked-by-other-PR merge-conflict 475/91 Mathlib.lean,Mathlib/Analysis/Complex/Schwarz.lean,Mathlib/Analysis/Complex/UnitDisc/Basic.lean,Mathlib/Analysis/Complex/UnitDisc/Schwarz.lean,Mathlib/Analysis/Complex/UnitDisc/Shift.lean 5 22 ['girving', 'github-actions', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot', 'urkud'] nobody
142-59163
4 months ago
144-27643
144 days ago
0-947
15 minutes
18805 astrainfinita
author:astrainfinita
 refactor: deprecate `SemilinearMapClass` --- I'm not sure if we want to do this, but let's see if we can get a speed up from it first. - [ ] depends on: #18755 - [ ] depends on: #18756 - [ ] depends on: #18806 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) WIP awaiting-bench t-algebra blocked-by-other-PR merge-conflict
label:t-algebra$
 546/318 Mathlib/Algebra/Algebra/Hom.lean,Mathlib/Algebra/Algebra/NonUnitalHom.lean,Mathlib/Algebra/Algebra/Rat.lean,Mathlib/Algebra/BigOperators/Balance.lean,Mathlib/Algebra/BigOperators/Expect.lean,Mathlib/Algebra/Category/ModuleCat/Basic.lean,Mathlib/Algebra/Group/Equiv/Basic.lean,Mathlib/Algebra/Group/Units/Equiv.lean,Mathlib/Algebra/GroupWithZero/Hom.lean,Mathlib/Algebra/Module/Equiv/Defs.lean,Mathlib/Algebra/Module/LinearMap/Defs.lean,Mathlib/Algebra/Module/LinearMap/Rat.lean,Mathlib/Algebra/Module/LocalizedModule/Int.lean,Mathlib/Algebra/Module/Submodule/EqLocus.lean,Mathlib/Algebra/Module/Submodule/Equiv.lean,Mathlib/Algebra/Module/Submodule/Ker.lean,Mathlib/Algebra/Module/Submodule/Map.lean,Mathlib/Algebra/Module/Submodule/Range.lean,Mathlib/Algebra/MvPolynomial/Equiv.lean,Mathlib/Algebra/Order/Hom/Monoid.lean,Mathlib/Algebra/Polynomial/AlgebraMap.lean,Mathlib/Algebra/Prime/Lemmas.lean,Mathlib/Algebra/Ring/Divisibility/Basic.lean,Mathlib/Algebra/Ring/Equiv.lean,Mathlib/Analysis/CStarAlgebra/Spectrum.lean,Mathlib/Analysis/LocallyConvex/WeakOperatorTopology.lean,Mathlib/Analysis/Normed/Algebra/Spectrum.lean,Mathlib/Analysis/Normed/Group/Uniform.lean,Mathlib/Analysis/Normed/Operator/LinearIsometry.lean,Mathlib/CategoryTheory/Limits/ConcreteCategory/WithAlgebraicStructures.lean,Mathlib/Combinatorics/Additive/FreimanHom.lean,Mathlib/Data/Complex/BigOperators.lean,Mathlib/FieldTheory/IsAlgClosed/AlgebraicClosure.lean,Mathlib/FieldTheory/SplittingField/Construction.lean,Mathlib/Geometry/Manifold/Instances/Sphere.lean,Mathlib/GroupTheory/GroupAction/Hom.lean,Mathlib/LinearAlgebra/Ray.lean,Mathlib/LinearAlgebra/Span.lean,Mathlib/RingTheory/Bialgebra/Equiv.lean,Mathlib/RingTheory/Flat/Basic.lean,Mathlib/RingTheory/HahnSeries/Addition.lean,Mathlib/RingTheory/Ideal/Norm.lean,Mathlib/RingTheory/Multiplicity.lean,Mathlib/RingTheory/Polynomial/Opposites.lean,Mathlib/RingTheory/RootsOfUnity/Basic.lean,Mathlib/Topology/Algebra/InfiniteSum/Basic.lean,Mathlib/Topology/Algebra/Module/Basic.lean,Mathlib/Topology/Algebra/Module/CharacterSpace.lean,Mathlib/Topology/Algebra/Module/FiniteDimension.lean,Mathlib/Topology/Algebra/Module/StrongTopology.lean,Mathlib/Topology/Algebra/Module/WeakDual.lean,Mathlib/Topology/Algebra/MulAction.lean,Mathlib/Topology/Homeomorph.lean,Mathlib/Topology/MetricSpace/Isometry.lean,scripts/no_lints_prime_decls.txt 55 2 ['github-actions', 'mathlib4-dependent-issues-bot'] nobody
141-51743
4 months ago
unknown
0-0
0 seconds
33448 astrainfinita
author:astrainfinita
 refactor: deprecate `ContinuousLinearMapClass` This PR continues the work from #18748. Original PR: https://github.com/leanprover-community/mathlib4/pull/18748 t-topology t-algebra awaiting-author merge-conflict
label:t-algebra$
 55/41 Mathlib/Analysis/CStarAlgebra/PositiveLinearMap.lean,Mathlib/Analysis/CStarAlgebra/Spectrum.lean,Mathlib/Analysis/LocallyConvex/WeakOperatorTopology.lean,Mathlib/Analysis/Normed/Algebra/Spectrum.lean,Mathlib/Analysis/Normed/Operator/LinearIsometry.lean,Mathlib/Topology/Algebra/Module/CharacterSpace.lean,Mathlib/Topology/Algebra/Module/Equiv.lean,Mathlib/Topology/Algebra/Module/FiniteDimension.lean,Mathlib/Topology/Algebra/Module/LinearMap.lean,Mathlib/Topology/Algebra/Module/StrongTopology.lean,Mathlib/Topology/Algebra/Module/WeakDual.lean 11 11 ['Ruben-VandeVelde', 'astrainfinita', 'github-actions', 'leanprover-radar', 'mathlib-merge-conflicts'] nobody
141-39367
4 months ago
141-39367
141 days ago
0-17239
4 hours
33462 eric-wieser
author:eric-wieser
 feat: teach `fun_prop` about `ContinousMultilinearMap.compContinuousLinearMap` For now I've omitted the curried version --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-analysis 46/0 Mathlib/Analysis/Normed/Module/Multilinear/Basic.lean 1 3 ['github-actions', 'sgouezel'] nobody
141-3288
4 months ago
141-16526
141 days ago
141-16237
141 days
32725 joelriou
author:joelriou
 feat(CategoryTheory): presheaves of types which preserve a limit Let `F : J ⥤ Cᵒᵖ` be a functor. We show that a presheaf `P : Cᵒᵖ ⥤ Type w` preserves the limit of `F` iff `P` is a local object with respect to a suitable family of morphisms in `Cᵒᵖ ⥤ Type w` (this family contains `1` or `0` morphism depending on whether the limit of `F` exists or not). --- - [x] depends on: #38257 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-category-theory awaiting-author WIP 187/0 Mathlib.lean,Mathlib/CategoryTheory/ObjectProperty/FunctorCategory/Presheaf.lean 5 8 ['github-actions', 'joelriou', 'mathlib-dependent-issues', 'mathlib-merge-conflicts', 'robin-carlier'] nobody
140-46324
4 months ago
140-46324
140 days ago
3-82684
3 days
32840 joelriou
author:joelriou
 chore(CategoryTheory): remove the old Ext API As it is now possible to compute `Ext`-groups (defined using the derived category) using an injective resolution #32105 or a projective resolution #32816, the old `Ext` API (based on left derived functors) is removed. WIP (more API for the new `Ext` is necessary...) --- - [ ] depends on: #32816 - [ ] depends on: #32105 - [ ] depends on: #32814 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) file-removed t-category-theory large-import merge-conflict WIP 546/116 Mathlib.lean,Mathlib/Algebra/Homology/DerivedCategory/Ext/Linear.lean,Mathlib/Algebra/Homology/DerivedCategory/KInjective.lean,Mathlib/Algebra/Homology/DerivedCategory/KProjective.lean,Mathlib/Algebra/Homology/Embedding/IsSupported.lean,Mathlib/Algebra/Homology/LocalCohomology.lean,Mathlib/CategoryTheory/Abelian/Ext.lean,Mathlib/CategoryTheory/Abelian/Injective/Ext.lean,Mathlib/CategoryTheory/Abelian/Injective/Extend.lean,Mathlib/CategoryTheory/Abelian/Projective/Ext.lean,Mathlib/CategoryTheory/Abelian/Projective/Extend.lean,Mathlib/RepresentationTheory/Homological/Resolution.lean 12 3 ['github-actions', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
140-40385
4 months ago
160-37875
160 days ago
0-408
6 minutes
33133 0xTerencePrime
author:0xTerencePrime
 feat(Algebra/Group/Center): add Decidable (IsMulCentral a) instance This PR adds a `Decidable` instance for `IsMulCentral a`. ### Summary The structure `IsMulCentral` was missing a `Decidable` instance. This PR provides the instance by leveraging `isMulCentral_iff`, enabling decidability for both multiplicative and additive (via `to_additive`) structures. ### Verification - `lake build Mathlib.Algebra.Group.Center` passed. - `lake exe runLinter Mathlib.Algebra.Group.Center` passed. t-algebra new-contributor awaiting-author
label:t-algebra$
 7/0 Mathlib/Algebra/Group/Center.lean 1 3 ['github-actions', 'robin-carlier'] ocfnash
assignee:ocfnash
140-37415
4 months ago
140-37415
140 days ago
12-60805
12 days
33191 sinhp
author:sinhp
 feat(CategoryTheory): Locally cartesian closed structure on presheaf categories The category of presheaves on a small category `C` is locally cartesian closed. --- - [ ] depends on: #30375 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) WIP t-category-theory blocked-by-other-PR merge-conflict 703/0 Mathlib.lean,Mathlib/CategoryTheory/LocallyCartesianClosed/Basic.lean,Mathlib/CategoryTheory/LocallyCartesianClosed/ChosenPullbacksAlong.lean,Mathlib/CategoryTheory/LocallyCartesianClosed/ExponentiableMorphism.lean,Mathlib/CategoryTheory/LocallyCartesianClosed/Sections.lean 5 3 ['github-actions', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
140-4359
4 months ago
151-39190
151 days ago
0-31
31 seconds
28153 kckennylau
author:kckennylau
 feat(Simproc): Simproc for explicit diagonal matrices ```lean example : (diagonal ![37, -1] : Matrix (Fin 2) (Fin 2) ℤ) = !![37, 0; 0, -1] := by simp ``` --- Shares code with #28148. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict awaiting-author t-meta 114/0 Mathlib.lean,Mathlib/Tactic.lean,Mathlib/Tactic/Simproc/Matrix.lean,scripts/noshake.json 4 6 ['Vierkantor', 'github-actions', 'kckennylau', 'mathlib4-merge-conflict-bot'] nobody
139-74393
4 months ago
227-23412
227 days ago
58-77127
58 days
25500 eric-wieser
author:eric-wieser
 feat: delaborators for metadata Being able to see these is very important when debugging tactic failures. Probably these could be upstreamed, but I don't think that's a reason not to merge them here first. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) large-import merge-conflict awaiting-author delegated t-meta 75/3 Mathlib/Util/Delaborators.lean,Mathlib/Util/PPOptions.lean,MathlibTest/delaborators.lean 3 19 ['JovanGerb', 'Rob23oba', 'eric-wieser', 'github-actions', 'kmill', 'mathlib-bors', 'mathlib4-merge-conflict-bot', 'plp127'] nobody
139-74345
4 months ago
267-18458
267 days ago
83-68773
83 days
28191 kckennylau
author:kckennylau
 feat(Logic): tag Injective, Surjective, and Bijective with fun_prop --- Zulip: * [#Is there code for X? > surjective is not funprop!](https://leanprover.zulipchat.com/#narrow/channel/217875-Is-there-code-for-X.3F/topic/surjective.20is.20not.20funprop!) * [#mathlib4 > `fun_prop` for Injective/Surjective/Bijective?](https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/.60fun_prop.60.20for.20Injective.2FSurjective.2FBijective.3F) [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict awaiting-author t-meta 16/0 Mathlib/Tactic/FunProp.lean 1 6 ['Vierkantor', 'github-actions', 'grunweg', 'kckennylau', 'mathlib4-merge-conflict-bot'] nobody
139-74331
4 months ago
227-27128
227 days ago
57-63332
57 days
30432 kckennylau
author:kckennylau
 feat(AlgebraicGeometry): define the non-vanishing locus of a set in Proj Given a subset `s : Set A`, the non-vanishing locus of `s` is the set of points whose corresponding prime ideal does not fully contain `s`. In other words, where not all elements of `s` vanish. I could not find a name for this in the literature. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) awaiting-author t-algebraic-geometry 66/0 Mathlib/AlgebraicGeometry/ProjectiveSpectrum/Basic.lean 1 4 ['github-actions', 'jcommelin'] nobody
139-74303
4 months ago
179-36219
179 days ago
44-12068
44 days
27262 Timeroot
author:Timeroot
 feat(Tactic/Bound): bound? for proof scripts --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) awaiting-author t-meta 22/7 Mathlib/Tactic/Bound.lean 1 13 ['JovanGerb', 'Timeroot', 'github-actions', 'j-loreaux', 'mathlib4-merge-conflict-bot'] nobody
139-66255
4 months ago
231-78580
231 days ago
13-18965
13 days
32389 LLaurance
author:LLaurance
 feat(Analysis): Trigonometric identities `sin` and `cos` of real and complex integer multiples of π/12 --- Resolves https://github.com/leanprover-community/mathlib4/pull/28630#discussion_r2307957255 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-analysis awaiting-author 120/0 Mathlib/Analysis/SpecialFunctions/Trigonometric/Basic.lean 1 11 ['LLaurance', 'artie2000', 'github-actions', 'j-loreaux'] nobody
139-44138
4 months ago
155-4469
155 days ago
15-36939
15 days
33502 MrQubo
author:MrQubo
 fix(Tactic/ProxyType): Pass params explicitly in proxy_equiv% implementation Fix [#mathlib4 > `deriving Fintype` with Prop](https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/.60deriving.20Fintype.60.20with.20Prop/with/566118621) --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor t-meta WIP 12/2 Mathlib/Tactic/ProxyType.lean,MathlibTest/DeriveFintype.lean 2 7 ['MrQubo', 'github-actions', 'kmill'] kmill
assignee:kmill
139-4339
4 months ago
139-4340
139 days ago
0-60133
16 hours
21344 kbuzzard
author:kbuzzard
 chore: attempt to avoid diamond in OreLocalization --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) please-adopt t-algebra
label:t-algebra$
 16/5 Mathlib/RingTheory/OreLocalization/Basic.lean 1 6 ['erdOne', 'github-actions', 'kbuzzard'] nobody
137-86322
4 months ago
472-84017
472 days ago
1-35979
1 day
33112 alreadydone
author:alreadydone
 feat(GroupAction): `(M →[M] M) ≃* Mᵐᵒᵖ` This comes up in #33108 in the form that permutations of a group commuting with the left multiplications are the right multiplications. The Semiring versions are already in mathlib. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra t-group-theory awaiting-author
label:t-algebra$
 41/3 Mathlib/GroupTheory/GroupAction/Hom.lean 1 2 ['github-actions', 'robin-carlier'] mattrobball
assignee:mattrobball
137-83166
4 months ago
140-32619
140 days ago
13-49137
13 days
27972 smmercuri
author:smmercuri
 refactor: make `Valuation.Completion` a `def` and refactor more of `AdicValuation.lean` This PR continues the work from #24590. Original PR: https://github.com/leanprover-community/mathlib4/pull/24590 WIP t-number-theory t-algebra merge-conflict
label:t-algebra$
 188/87 Mathlib/NumberTheory/NumberField/FinitePlaces.lean,Mathlib/NumberTheory/Padics/WithVal.lean,Mathlib/RingTheory/DedekindDomain/AdicValuation.lean,Mathlib/RingTheory/DedekindDomain/FiniteAdeleRing.lean,Mathlib/RingTheory/LaurentSeries.lean,Mathlib/Topology/Algebra/Valued/WithVal.lean 6 8 ['github-actions', 'leanprover-bot', 'mathlib4-merge-conflict-bot', 'smmercuri'] nobody
137-15505
4 months ago
247-37215
247 days ago
3-78979
3 days
17176 arulandu
author:arulandu
 feat: integrals and integrability with .re Lemmas for swapping order of .re and integration/integrability. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict awaiting-author new-contributor t-measure-probability please-adopt 49/0 Mathlib/MeasureTheory/Function/L1Space.lean,Mathlib/MeasureTheory/Integral/IntegrableOn.lean,Mathlib/MeasureTheory/Integral/IntervalIntegral.lean,Mathlib/MeasureTheory/Integral/SetIntegral.lean 4 32 ['EtienneC30', 'arulandu', 'github-actions', 'loefflerd'] nobody
137-7337
4 months ago
584-54574
584 days ago
9-73631
9 days
33586 CoolRmal
author:CoolRmal
 feat: Lower Limit Topology --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-topology 328/0 Mathlib.lean,Mathlib/Topology/Order/LowerUpperLimitTopology.lean 2 10 ['CoolRmal', 'github-actions', 'plp127'] nobody
137-6039
4 months ago
unknown
0-0
0 seconds
24129 urkud
author:urkud
 feat: symmetry of Gateaux derivatives --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-analysis 189/1 Mathlib/Analysis/Calculus/LineDeriv/Basic.lean,Mathlib/Analysis/Calculus/LineDeriv/Symmetric.lean 2 2 ['github-actions', 'mathlib4-merge-conflict-bot'] nobody
136-69289
4 months ago
unknown
0-0
0 seconds
33640 JovanGerb
author:JovanGerb
 feat: tool for finding duplicate declarations This PR defines a tool for finding duplicate declarations automatically. This can be used to help fix this technical debt. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-meta 176/0 Mathlib.lean,Mathlib/Tactic.lean,Mathlib/Tactic/DuplicateDecls.lean 3 1 ['github-actions'] nobody
136-36815
4 months ago
136-75168
136 days ago
0-80
1 minute
33368 urkud
author:urkud
 feat: define `Complex.UnitDisc.shift` Also review the existing API UPD: I'm going to define a `PSL(2, Real)` action instead. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-analysis awaiting-zulip merge-conflict 273/39 Mathlib.lean,Mathlib/Analysis/Complex/UnitDisc/Basic.lean,Mathlib/Analysis/Complex/UnitDisc/Shift.lean 3 7 ['github-actions', 'j-loreaux', 'mathlib4-merge-conflict-bot', 'sgouezel', 'urkud'] j-loreaux
assignee:j-loreaux
135-60331
4 months ago
136-20664
136 days ago
7-10690
7 days
33450 astrainfinita
author:astrainfinita
 refactor: deprecate `LinearIsometryClass` --- - [ ] depends on: #33448 - [ ] depends on: #33454 This PR continues the work from #18755. Original PR: https://github.com/leanprover-community/mathlib4/pull/18755 t-algebra t-analysis blocked-by-other-PR t-topology merge-conflict
label:t-algebra$
 128/125 Mathlib/Analysis/CStarAlgebra/PositiveLinearMap.lean,Mathlib/Analysis/CStarAlgebra/Spectrum.lean,Mathlib/Analysis/LocallyConvex/WeakOperatorTopology.lean,Mathlib/Analysis/Normed/Affine/Isometry.lean,Mathlib/Analysis/Normed/Algebra/Spectrum.lean,Mathlib/Analysis/Normed/Group/Uniform.lean,Mathlib/Analysis/Normed/Operator/LinearIsometry.lean,Mathlib/Topology/Algebra/Module/CharacterSpace.lean,Mathlib/Topology/Algebra/Module/Equiv.lean,Mathlib/Topology/Algebra/Module/FiniteDimension.lean,Mathlib/Topology/Algebra/Module/LinearMap.lean,Mathlib/Topology/Algebra/Module/StrongTopology.lean,Mathlib/Topology/Algebra/Module/WeakDual.lean,Mathlib/Topology/MetricSpace/DilationEquiv.lean,Mathlib/Topology/MetricSpace/Isometry.lean 15 5 ['astrainfinita', 'github-actions', 'leanprover-radar', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
135-60206
4 months ago
141-52997
141 days ago
0-304
5 minutes
33434 astrainfinita
author:astrainfinita
 chore: redefine `Finsupp.indicator` using `Finsupp.onFinset` --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-data merge-conflict 6/17 Mathlib/Data/Finsupp/Indicator.lean 1 2 ['github-actions', 'mathlib-merge-conflicts'] nobody
135-29296
4 months ago
43-6452
43 days ago
5-35275
5 days
33554 themathqueen
author:themathqueen
 chore(Analysis/Normed/Module/Normalize): allow for `RCLike` instead of just the reals Only the last lemma `normalize_smul` needs `ℝ`, which we rename to `normalize_real_smul`. This also makes `𝕜` explicit in half of the results. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-analysis awaiting-author merge-conflict 67/60 Mathlib/Analysis/CStarAlgebra/Unitary/Span.lean,Mathlib/Analysis/Normed/Module/Normalize.lean,Mathlib/Geometry/Euclidean/Angle/Unoriented/Basic.lean,Mathlib/Geometry/Euclidean/Angle/Unoriented/TriangleInequality.lean,Mathlib/Geometry/Euclidean/SignedDist.lean 5 4 ['github-actions', 'j-loreaux', 'mathlib4-merge-conflict-bot', 'themathqueen'] nobody
135-17178
4 months ago
136-9927
136 days ago
1-85731
1 day
27507 grunweg
author:grunweg
 wip(commandStart): check the indentation of declaration keywords also Check that e.g. a `lemma` keyword always starts on column 1 (unless preceded by an attribute). --- TODO: - make this work for other declarations also - the position reported for the lemma column is not helpful (it might be the absolute column in the file, but that's missing line information) [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) WIP t-linter merge-conflict 84/1 Mathlib/Tactic/Linter/CommandStart.lean,MathlibTest/CommandStart.lean 2 3 ['github-actions', 'grunweg', 'mathlib4-merge-conflict-bot'] nobody
134-82515
4 months ago
300-38921
300 days ago
0-2
2 seconds
33330 michael-novak-math
author:michael-novak-math
 feat: add arc-length reparametrization of parametrized curves add new definitions of arc-length reparametrization and its corresponding parameter transformation and a theorem establishing the desired properties. t-analysis new-contributor awaiting-author merge-conflict 311/0 Mathlib.lean,Mathlib/Analysis/Calculus/ArcLengthReparametrization.lean,Mathlib/MeasureTheory/Integral/IntervalIntegral/FundThmCalculus.lean,docs/references.bib 5 57 ['SnirBroshi', 'github-actions', 'grunweg', 'j-loreaux', 'mathlib-merge-conflicts', 'mathlib4-merge-conflict-bot', 'michael-novak-math'] j-loreaux
assignee:j-loreaux
134-74692
4 months ago
59-49419
59 days ago
6-69934
6 days
24010 grunweg
author:grunweg
 feat(Counterexamples): a non-negative function, not a.e. zero, with vanishing lowe… …r Lebesgue integral. Came up in #23707, let's document this while we're at it. --- - [ ] depends on: #20722 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict please-adopt WIP blocked-by-other-PR t-measure-probability 110/0 Counterexamples.lean,Counterexamples/LIntegralZero.lean 2 3 ['github-actions', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
134-31967
4 months ago
404-7012
404 days ago
0-22
22 seconds
33756 dleijnse
author:dleijnse
 feat(FieldTheory): root of polynomial with p power coefficients This PR proves the results in https://stacks.math.columbia.edu/tag/031V, which gives a criterion for a root of a polynomial over a field `k` of characteristic `p` to be a `p`-th power. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra new-contributor
label:t-algebra$
 88/0 Mathlib.lean,Mathlib/FieldTheory/PthPowerCoeffPoly.lean 2 1 ['github-actions'] nobody
134-25837
4 months ago
unknown
0-0
0 seconds
28700 Timeroot
author:Timeroot
 feat(ModelTheory): Set.Definable is transitive --- This PR continues the work from #19695. Original PR: https://github.com/leanprover-community/mathlib4/pull/19695 - [x] depends on: #26332 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-logic merge-conflict large-import 529/8 Mathlib/ModelTheory/Definability.lean,Mathlib/ModelTheory/Semantics.lean,Mathlib/ModelTheory/Syntax.lean 5 9 ['Timeroot', 'github-actions', 'mathlib-merge-conflicts', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot', 'staroperator'] nobody
134-25678
4 months ago
52-5831
52 days ago
3-9082
3 days
30608 grunweg
author:grunweg
 feat: another lemma about derivatives of parametric integrals On the path towards proving that integrating smooth functions is smooth. From the sphere-eversion project; I am just upstreaming this. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict awaiting-author t-analysis 125/0 Mathlib/Analysis/Calculus/ParametricIntegral.lean 1 8 ['Ruben-VandeVelde', 'github-actions', 'j-loreaux', 'mathlib4-merge-conflict-bot'] j-loreaux
assignee:j-loreaux
134-20677
4 months ago
199-25246
199 days ago
18-81847
18 days
30610 grunweg
author:grunweg
 feat: yet another lemma about differentiability of parametric integrals From sphere-eversion. --- TODO: explicitly make Floris a co-author again - [ ] depends on: #30608 - [ ] depends on: #30612 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict blocked-by-other-PR t-analysis 193/0 Mathlib/Analysis/Calculus/ParametricIntegral.lean 1 3 ['github-actions', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
134-20676
4 months ago
218-20416
218 days ago
0-7778
2 hours
33299 kingiler
author:kingiler
 feat: Add decidable membership for Interval Implemented membership and corresponding decidable instance for `Interval`. Related [#mathlib4 > Proposal: Add decidable membership for Interval](https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/Proposal.3A.20Add.20decidable.20membership.20for.20Interval/with/565438009). --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) awaiting-author new-contributor t-order 16/1 Mathlib/Order/Interval/Basic.lean 1 5 ['Vierkantor', 'eric-wieser', 'github-actions', 'kingiler'] Vierkantor
assignee:Vierkantor
134-17643
4 months ago
134-17643
134 days ago
13-42146
13 days
30142 shalliso
author:shalliso
 feat(Topology/Baire): define IsNonMeagre non-meagre sets (also known as "of the second category") are worthy of their own definition and API. This was useful to me for formalizing a result of "automatic continuity", that is, a Baire-measurable homomorphism between Polish groups must be continuous. Simply working with the negation of IsMeagre quickly became cumbersome, and non-meagre sets have an important role in the study of Polish (e.g. locally compact) groups. From https://github.com/shalliso/automatic_continuity --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-topology new-contributor merge-conflict awaiting-author 83/1 Mathlib/Topology/Baire/NonMeagre.lean,Mathlib/Topology/GDelta/Basic.lean 2 6 ['github-actions', 'grunweg', 'mathlib4-merge-conflict-bot'] nobody
133-27327
4 months ago
133-27328
133 days ago
98-58846
98 days
30953 kim-em
author:kim-em
 experiment: add `canonical` to Mathlib Depends on (these must be merged first before CI will succeed here) - [x] #30952 - [x] #30844 merge-conflict 63/3 Mathlib/Tactic/Common.lean,Mathlib/Tactic/Linter/DirectoryDependency.lean,MathlibTest/canonical.lean,lake-manifest.json,lakefile.lean 5 3 ['github-actions', 'mathlib4-merge-conflict-bot'] nobody
132-84587
4 months ago
206-82039
206 days ago
0-865
14 minutes
32470 ADedecker
author:ADedecker
 feat: the space of test functions is barrelled --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-analysis merge-conflict 22/0 Mathlib/Analysis/Distribution/TestFunction.lean 1 2 ['github-actions', 'mathlib4-merge-conflict-bot'] nobody
132-84101
4 months ago
unknown
0-0
0 seconds
33102 adomani
author:adomani
 perf: add a syntactic check for flexible linter This is very preliminary. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-linter merge-conflict 205/2 Mathlib/Tactic/Linter/FlexibleLinter.lean,MathlibTest/FlexibleLinter.lean 2 10 ['adomani', 'github-actions', 'leanprover-radar', 'mathlib4-merge-conflict-bot'] nobody
132-83975
4 months ago
unknown
0-0
0 seconds
30562 dwrensha
author:dwrensha
 fix(Data/Fintype/Perm): make the main logic of Equiv.instFintype irreducible Adds a new `irreducible_def` for the main branch of `Equiv.instFintype` to avoid errors about deep recursion. This is an update of #15045 and #30560 according to the discussion in those PRs and in [this zulip thread](https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/kernel.20deep.20recursion.20detected/near/454301820). --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) awaiting-author t-data 44/10 Mathlib/Combinatorics/Derangements/Finite.lean,Mathlib/Data/Fintype/Perm.lean,Mathlib/Data/Matrix/Cartan.lean,Mathlib/LinearAlgebra/Matrix/SpecialLinearGroup.lean,MathlibTest/MatrixDetOne.lean 5 18 ['dwrensha', 'github-actions', 'leanprover-bot', 'plp127', 'robin-carlier'] robin-carlier
assignee:robin-carlier
132-81060
4 months ago
207-28045
207 days ago
12-56370
12 days
33669 eric-wieser
author:eric-wieser
 chore(Data/Nat/Digits): refactor to use List.rightpad --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) large-import merge-conflict 32/12 Mathlib/Algebra/BigOperators/Group/List/Defs.lean,Mathlib/Algebra/Group/Basic.lean,Mathlib/Data/List/Lemmas.lean,Mathlib/Data/Nat/Digits/Defs.lean,Mathlib/Data/Nat/Digits/Lemmas.lean 5 3 ['github-actions', 'mathlib4-merge-conflict-bot', 'xroblot'] nobody
132-49692
4 months ago
136-18382
136 days ago
0-237
3 minutes
25905 mans0954
author:mans0954
 feat(RingTheory/Polynomial/SmallDegreeVieta): polynomial versions of results in Algebra.QuadraticDiscriminant This PR continues the work from #25605. Original PR: https://github.com/leanprover-community/mathlib4/pull/25605 merge-conflict t-ring-theory please-adopt 77/8 Mathlib/Algebra/Polynomial/Coeff.lean,Mathlib/RingTheory/Polynomial/SmallDegreeVieta.lean 2 47 ['chrisflav', 'github-actions', 'kckennylau', 'mans0954', 'mathlib4-merge-conflict-bot', 'ocfnash'] chrisflav
assignee:chrisflav
131-82630
4 months ago
258-24609
258 days ago
82-4874
82 days
26339 mans0954
author:mans0954
 feat(Analysis/Normed/Module/WeakDual): Banach Dieudonné Lemma This PR continues the work from #16316. Original PR: https://github.com/leanprover-community/mathlib4/pull/16316 merge-conflict WIP t-analysis large-import please-adopt 377/3 Mathlib/Analysis/LocallyConvex/AbsConvex.lean,Mathlib/Analysis/LocallyConvex/Polar.lean,Mathlib/Analysis/Normed/Module/WeakDual.lean,Mathlib/Topology/UniformSpace/Cauchy.lean 4 5 ['github-actions', 'mans0954', 'mathlib4-merge-conflict-bot'] nobody
131-82591
4 months ago
332-52640
332 days ago
0-1087
18 minutes
26340 mans0954
author:mans0954
 feat(Algebra/Module/NestAlgebra): Nest algebras This PR continues the work from #18705. Original PR: https://github.com/leanprover-community/mathlib4/pull/18705 merge-conflict t-algebra please-adopt
label:t-algebra$
 184/0 Mathlib.lean,Mathlib/Algebra/Module/NestAlgebra.lean,Mathlib/Order/Nest.lean,Mathlib/Order/Preorder/Chain.lean,docs/references.bib 5 3 ['github-actions', 'mans0954', 'mathlib4-merge-conflict-bot'] nobody
131-82575
4 months ago
327-8081
327 days ago
5-45567
5 days
26342 mans0954
author:mans0954
 WiP: Expansion of the tensor product of quadratic maps over a linear combination This PR continues the work from #19806. Original PR: https://github.com/leanprover-community/mathlib4/pull/19806 WIP t-algebra please-adopt
label:t-algebra$
 483/0 Mathlib/Data/Sym/Sym2/Prod.lean,Mathlib/LinearAlgebra/QuadraticForm/Basic.lean,Mathlib/LinearAlgebra/QuadraticForm/Basis.lean,Mathlib/LinearAlgebra/QuadraticForm/TensorProduct.lean 4 2 ['github-actions', 'mans0954'] nobody
131-82567
4 months ago
unknown
0-0
0 seconds
26341 mans0954
author:mans0954
 feat(LinearAlgebra/QuadraticForm/Basis): Free Tensor product of Quadratic Maps This PR continues the work from #19432. Original PR: https://github.com/leanprover-community/mathlib4/pull/19432 merge-conflict WIP t-algebra large-import please-adopt
label:t-algebra$
 888/0 Mathlib.lean,Mathlib/Data/Sym/Sym2/Prod.lean,Mathlib/LinearAlgebra/QuadraticForm/Basis.lean 3 3 ['github-actions', 'mans0954', 'mathlib4-merge-conflict-bot'] nobody
131-82344
4 months ago
332-53242
332 days ago
0-259
4 minutes
26343 mans0954
author:mans0954
 feat(Analysis/Normed/Module/Complemented): The idempotent associated with a complemented subspace Given a complemented subspace `p` of a Banach space `E`, with complement `q`, there exists an idempotent `P` in the ring `E →L[𝕜] E` such that `P` has range `p` and kernel `q`. Similarly `1-P` has range `q` and kernel `p`. See Rudin, Functional Analysis, Theorem 5.16. --- This PR continues the work from #20330. Original PR: https://github.com/leanprover-community/mathlib4/pull/20330 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) WIP awaiting-CI large-import merge-conflict t-analysis please-adopt 185/3 Mathlib/Algebra/Module/End.lean,Mathlib/Algebra/Module/Hom.lean,Mathlib/Algebra/Module/LinearMap/End.lean,Mathlib/Analysis/Normed/Module/Complemented.lean,Mathlib/RingTheory/Idempotents.lean 5 3 ['github-actions', 'mans0954', 'mathlib4-merge-conflict-bot'] nobody
131-82337
4 months ago
unknown
0-0
0 seconds
26344 mans0954
author:mans0954
 feat(Analysis/NormedSpace/MStructure): The component projections on WithLp 1 (α × β) are L-projections This PR continues the work from #20380. Original PR: https://github.com/leanprover-community/mathlib4/pull/20380 merge-conflict WIP t-analysis file-removed please-adopt 20/1 Mathlib.lean,Mathlib/Analysis/Normed/Lp/MStructure.lean,Mathlib/Analysis/Normed/Lp/ProdLp.lean 3 3 ['github-actions', 'mans0954', 'mathlib4-merge-conflict-bot'] nobody
131-77140
4 months ago
327-8734
327 days ago
5-43696
5 days
26346 mans0954
author:mans0954
 feat(LinearAlgebra/QuadraticForm/TensorProduct): Extend `baseChange_ext` to work over a free module This PR continues the work from #21814. Original PR: https://github.com/leanprover-community/mathlib4/pull/21814 merge-conflict WIP t-algebra please-adopt
label:t-algebra$
 105/5 Mathlib/LinearAlgebra/Basis/Bilinear.lean,Mathlib/LinearAlgebra/QuadraticForm/TensorProduct.lean 2 3 ['github-actions', 'mans0954', 'mathlib4-merge-conflict-bot'] nobody
131-77121
4 months ago
unknown
0-0
0 seconds
26347 mans0954
author:mans0954
 feat(Data/Finset/RangeDistance): abs_sub_lt_of_mem_finset_range This PR continues the work from #23161. Original PR: https://github.com/leanprover-community/mathlib4/pull/23161 merge-conflict t-data please-adopt 30/0 Mathlib.lean,Mathlib/Algebra/Order/Group/Unbundled/Abs.lean,Mathlib/Data/Finset/RangeDistance.lean 3 3 ['github-actions', 'mans0954', 'mathlib4-merge-conflict-bot'] alreadydone
assignee:alreadydone
131-77117
4 months ago
184-51215
184 days ago
148-922
148 days
26349 mans0954
author:mans0954
 feat(Analysis/SpecialFunctions/Trigonometric/Basic): sin and cos of multiples of π / 3 This PR continues the work from #25009. Original PR: https://github.com/leanprover-community/mathlib4/pull/25009 help-wanted t-analysis please-adopt 159/0 Mathlib/Algebra/Order/Monoid/NatCast.lean,Mathlib/Analysis/SpecialFunctions/Trigonometric/Basic.lean,Mathlib/Data/Nat/Cast/Defs.lean,MathlibTest/trigonometry.lean 4 3 ['github-actions', 'mans0954', 'themathqueen'] nobody
131-77073
4 months ago
327-9018
327 days ago
5-42837
5 days
26348 mans0954
author:mans0954
 feat(Analysis/LocallyConvex/Prime): the prime map This PR continues the work from #24385. Original PR: https://github.com/leanprover-community/mathlib4/pull/24385 merge-conflict WIP t-analysis please-adopt 125/0 Mathlib.lean,Mathlib/Analysis/LocallyConvex/Prime.lean 2 3 ['github-actions', 'mans0954', 'mathlib4-merge-conflict-bot'] nobody
131-77064
4 months ago
327-8969
327 days ago
5-43062
5 days
26983 mans0954
author:mans0954
 feat(Order/LatticeElements): distributive, standard and neutral elements of a lattice Defines distributive, standard and neutral elements of a lattice and gives equivalent conditions. --- - [x] depends on: #26836 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict WIP t-order please-adopt 238/0 Mathlib.lean,Mathlib/Order/Hom/Lattice.lean,Mathlib/Order/LatticeElements.lean 3 5 ['github-actions', 'leanprover-community-bot-assistant', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
131-77031
4 months ago
229-14888
229 days ago
0-20134
5 hours
29980 mans0954
author:mans0954
 refactor(RingTheory/Polynomial/Resultant/Quadratic): Re-implement QuadraticDiscriminant for R[X] Re-implement `Algebra/QuadraticDiscriminant` for polynomials. [Zulip discussion](https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/discriminants.20of.20low.20degree.20polynomials/with/538010519) --- - [ ] depends on: #29981 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict please-adopt 208/0 Mathlib.lean,Mathlib/RingTheory/Polynomial/Resultant/Quadratic.lean 2 4 ['JovanGerb', 'github-actions', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] JovanGerb
assignee:JovanGerb
131-76998
4 months ago
184-49952
184 days ago
41-47807
41 days
29387 mans0954
author:mans0954
 feat(Analysis/LocallyConvex/WeakSpace): toWeakSpace_closedAbsConvexHull_eq The closed absolutely convex hull taken in the weak topology coincides with the closed absolutely convex hull taken in the original topology. --- - [ ] depends on: #29378 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict blocked-by-other-PR t-analysis please-adopt 133/68 Mathlib/Analysis/Convex/Basic.lean,Mathlib/Analysis/LocallyConvex/AbsConvex.lean,Mathlib/Analysis/LocallyConvex/AbsConvexOpen.lean,Mathlib/Analysis/LocallyConvex/BalancedCoreHull.lean,Mathlib/Analysis/LocallyConvex/Basic.lean,Mathlib/Analysis/Normed/Module/Dual.lean 6 5 ['github-actions', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
131-76979
4 months ago
258-12441
258 days ago
0-2474
41 minutes
30393 mans0954
author:mans0954
 WIP: Bipolar theorem absconvex refactor Experiment to see what happens when #26345 and #29342 are merged. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict WIP large-import please-adopt 383/138 Mathlib.lean,Mathlib/Analysis/Convex/Basic.lean,Mathlib/Analysis/LocallyConvex/AbsConvex.lean,Mathlib/Analysis/LocallyConvex/AbsConvexOpen.lean,Mathlib/Analysis/LocallyConvex/Basic.lean,Mathlib/Analysis/LocallyConvex/Bipolar.lean,Mathlib/Analysis/LocallyConvex/Polar.lean,Mathlib/Analysis/LocallyConvex/WeakDual.lean,Mathlib/Analysis/Normed/Module/Dual.lean,Mathlib/Topology/Algebra/Module/LinearSpan.lean,Mathlib/Topology/Algebra/Module/StrongTopology.lean,Mathlib/Topology/Algebra/Module/WeakBilin.lean 12 2 ['github-actions', 'mathlib4-merge-conflict-bot'] nobody
131-76835
4 months ago
unknown
0-0
0 seconds
29378 mans0954
author:mans0954
 feat(Analysis/LocallyConvex/AbsConvex): Balanced and AbsConvex sets under linear maps Provide `Balanced` and `AbsConvex` versions of `Convex.linear_image`, `Convex.linear_preimage` and the `is_linear` equivalents. --- - [ ] depends on: #29342 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-analysis please-adopt 133/68 Mathlib/Analysis/Convex/Basic.lean,Mathlib/Analysis/LocallyConvex/AbsConvex.lean,Mathlib/Analysis/LocallyConvex/AbsConvexOpen.lean,Mathlib/Analysis/LocallyConvex/BalancedCoreHull.lean,Mathlib/Analysis/LocallyConvex/Basic.lean,Mathlib/Analysis/Normed/Module/Dual.lean 6 4 ['github-actions', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
131-76819
4 months ago
219-66720
219 days ago
0-14664
4 hours
26337 mans0954
author:mans0954
 feat(Analysis/NormedSpace/MStructure): M-ideals This PR continues the work from #14369. Original PR: https://github.com/leanprover-community/mathlib4/pull/14369 merge-conflict WIP t-analysis large-import please-adopt 857/40 Mathlib/Algebra/Module/End.lean,Mathlib/Algebra/Module/Hom.lean,Mathlib/Algebra/Module/LinearMap/End.lean,Mathlib/Analysis/Normed/Module/Complemented.lean,Mathlib/Analysis/NormedSpace/MStructure.lean 5 4 ['github-actions', 'mans0954', 'mathlib4-merge-conflict-bot'] nobody
131-76560
4 months ago
unknown
0-0
0 seconds
31981 jsm28
author:jsm28
 feat(Geometry/Euclidean/Incenter): `tangentSet` and `tangentsFrom` lemmas Add lemmas relating the faces of a simplex to `tangentSet` and `tangentsFrom` for an exsphere, in particular for a triangle that any two side lines are the `tangentsFrom` their shared vertex to the insphere or any exsphere. --- - [ ] depends on: #31733 - [ ] depends on: #31891 - [ ] depends on: #31892 - [ ] depends on: #31893 - [x] depends on: #31978 - [ ] depends on: #31979 - [x] depends on: #31980 - [ ] depends on: #32296 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-euclidean-geometry blocked-by-other-PR 578/9 Mathlib.lean,Mathlib/Geometry/Euclidean/Incenter.lean,Mathlib/Geometry/Euclidean/Sphere/PolePolar.lean,Mathlib/Geometry/Euclidean/Sphere/Tangent.lean 5 4 ['github-actions', 'mathlib-merge-conflicts', 'mathlib4-dependent-issues-bot'] nobody
130-70377
4 months ago
180-72233
180 days ago
0-1725
28 minutes
13158 erdOne
author:erdOne
 refactor(RingTheory/OreLocalization/Module): remove `LocalizedModule.mk`. --- - [x] depends on: #13151 - [ ] depends on: #13156 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-algebra blocked-by-other-PR
label:t-algebra$
 49/48 Mathlib/RingTheory/OreLocalization/Basic.lean,Mathlib/RingTheory/OreLocalization/Module.lean 2 2 ['urkud'] nobody
130-64138
4 months ago
715-38206
715 days ago
9-15083
9 days
12934 grunweg
author:grunweg
 chore: replace more uses of > or ≥ by < or ≤ These were flagged by the linter in https://github.com/leanprover-community/mathlib4/pull/12879: it is easy to simple avoid > or ≥ in hypotheses or haves. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict awaiting-author help-wanted 41/42 Archive/Imo/Imo1962Q1.lean,Archive/Imo/Imo1988Q6.lean,Archive/Imo/Imo1994Q1.lean,Archive/Imo/Imo2005Q3.lean,Archive/Imo/Imo2006Q3.lean,Archive/Imo/Imo2008Q2.lean,Archive/Imo/Imo2008Q3.lean,Archive/Imo/Imo2019Q4.lean,Archive/Sensitivity.lean,Archive/Wiedijk100Theorems/CubingACube.lean,Mathlib/Tactic/Linarith/Datatypes.lean,test/cancel_denoms.lean,test/congr.lean,test/interval_cases.lean,test/observe.lean 15 12 ['YaelDillies', 'adomani', 'github-actions', 'grunweg', 'jcommelin', 'urkud'] nobody
130-64045
4 months ago
735-33470
735 days ago
1-73101
1 day
28070 grunweg
author:grunweg
 style: improve indentation of multi-linear enumerations in doc-strings Per zulip discussion: [#mathlib4 > Style :bicycle: : indenting second lines in doc-strings @ 💬](https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/Style.20.3Abicycle.3A.20.3A.20indenting.20second.20lines.20in.20doc-strings/near/533105734). --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict 111/108 Archive/Wiedijk100Theorems/SumOfPrimeReciprocalsDiverges.lean,Mathlib/Algebra/Algebra/Defs.lean,Mathlib/Algebra/BrauerGroup/Defs.lean,Mathlib/Algebra/Module/LinearMap/Polynomial.lean,Mathlib/CategoryTheory/Abelian/NonPreadditive.lean,Mathlib/CategoryTheory/EqToHom.lean,Mathlib/CategoryTheory/Filtered/Basic.lean,Mathlib/CategoryTheory/Limits/Final.lean,Mathlib/CategoryTheory/Limits/Pi.lean,Mathlib/CategoryTheory/Monoidal/Center.lean,Mathlib/CategoryTheory/Sites/Grothendieck.lean,Mathlib/CategoryTheory/Sites/Pretopology.lean,Mathlib/Condensed/Discrete/Characterization.lean,Mathlib/FieldTheory/ChevalleyWarning.lean,Mathlib/GroupTheory/MonoidLocalization/Basic.lean,docs/Conv/Guide.lean 16 8 ['github-actions', 'grunweg', 'kbuzzard', 'mathlib4-merge-conflict-bot', 'urkud'] nobody
130-63922
4 months ago
287-33001
287 days ago
1-19000
1 day
29077 grunweg
author:grunweg
 feat(Manifold/Instances/Icc): golf smoothness proof using immersions Prove that the inclusion of an interval into the real numbers is a smooth immersion, and use this to golf the proof that this inclusion is smooth. TODO: right now, the computation doesn't check out; I need to tweak the charts I have. But that is surely doable. A future PR will prove it is a smooth embedding. --- - [ ] depends on: #28865 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict blocked-by-other-PR t-differential-geometry 1122/56 Mathlib.lean,Mathlib/Analysis/Calculus/ContDiff/Basic.lean,Mathlib/Analysis/Calculus/ContDiff/Defs.lean,Mathlib/Geometry/Manifold/ChartedSpace.lean,Mathlib/Geometry/Manifold/ContMDiff/Atlas.lean,Mathlib/Geometry/Manifold/ContMDiff/Defs.lean,Mathlib/Geometry/Manifold/Instances/Icc.lean,Mathlib/Geometry/Manifold/IsImmersionEmbedding.lean,Mathlib/Geometry/Manifold/IsManifold/Basic.lean,Mathlib/Geometry/Manifold/IsManifold/ExtChartAt.lean,Mathlib/Topology/PartialHomeomorph.lean,docs/references.bib,temp_.sh 13 3 ['github-actions', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
130-24529
4 months ago
267-14378
267 days ago
0-309
5 minutes
32880 0xTerencePrime
author:0xTerencePrime
 feat(Analysis/Asymptotics): define subpolynomial growth ## Main definitions * `Asymptotics.IsSubpolynomial l f g`: A function `f` has subpolynomial growth with respect to `g` along filter `l` if `f = O(1 + ‖g‖^k)` for some natural `k`. ## Main results * `IsSubpolynomial.const`: Constant functions have subpolynomial growth * `IsSubpolynomial.id`: Identity has subpolynomial growth * `IsSubpolynomial.add`: Closure under addition * `IsSubpolynomial.neg`: Closure under negation * `IsSubpolynomial.sub`: Closure under subtraction * `IsSubpolynomial.mul`: Closure under multiplication * `IsSubpolynomial.pow`: Closure under powers * `isSubpolynomial_iff_one_add`: Equivalence with `(1 + ‖g‖)^k` formulation * `IsSubpolynomial.uniform`: Uniform bounds for finite families ## Implementation notes The definition uses `1 + ‖g‖^k` rather than `(1 + ‖g‖)^k` as the primary form, with the equivalence established in `isSubpolynomial_iff_one_add`. Four private auxiliary lemmas handle the key inequalities needed for closure proofs. Closes #32658 awaiting-author t-analysis new-contributor 185/0 Mathlib.lean,Mathlib/Analysis/Asymptotics/Subpolynomial.lean 2 29 ['0xTerencePrime', 'ADedecker', 'github-actions', 'j-loreaux'] ADedecker
assignee:ADedecker
130-10411
4 months ago
130-78269
130 days ago
22-14560
22 days
33814 seewoo5
author:seewoo5
 feat(Manifold/MFDeriv): add `MDifferentiable.pow` with FunProp --- - [ ] depends on: #33808 Tag `MDifferentiable.pow` with `fun_prop`. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-differential-geometry blocked-by-other-PR merge-conflict 22/0 Mathlib/Geometry/Manifold/MFDeriv/Basic.lean,Mathlib/Geometry/Manifold/MFDeriv/Defs.lean,Mathlib/Geometry/Manifold/MFDeriv/SpecificFunctions.lean 3 3 ['github-actions', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
129-1899
4 months ago
132-47522
132 days ago
0-8651
2 hours
33948 anivegesana
author:anivegesana
 feat(Analysis/Normed/Algebra): matrix exponential of nilpotent matrix Where the matrix exponential and nilpotent elements are defined, both the matrix exponential and the nilpotent element exponential. I had to add a different theorem for normed space exponential and the matrix exponential since the right instances wouldn't be synthesized. Help with golfing would be appreciated. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor t-analysis 34/0 Mathlib/Analysis/Normed/Algebra/Exponential.lean,Mathlib/Analysis/Normed/Algebra/MatrixExponential.lean 2 1 ['github-actions'] nobody
128-61396
4 months ago
128-61468
128 days ago
128-61179
128 days
30030 JonBannon
author:JonBannon
 feat(MeasureTheory): add `MemLp.Const` class and instances to unify `p = ∞` and `μ.IsFiniteMeasure` cases Although it is possible to ensure that, for example, the `One` instances for `p=∞` and `μ.IsFiniteMeasure` are defeq, introducing an `MemLp.Const` typeclass removes the need to unfold extensively to check this definitional equality, improving performance. cf. https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/Lp.20constant.20function.20issue/with/537563137 This PR introduces the requisite class and associated instances. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) awaiting-author t-measure-probability merge-conflict 224/136 Mathlib/MeasureTheory/Function/ConditionalExpectation/AEMeasurable.lean,Mathlib/MeasureTheory/Function/ContinuousMapDense.lean,Mathlib/MeasureTheory/Function/L1Space/Integrable.lean,Mathlib/MeasureTheory/Function/LocallyIntegrable.lean,Mathlib/MeasureTheory/Function/LpSeminorm/Basic.lean,Mathlib/MeasureTheory/Function/LpSpace/Basic.lean,Mathlib/MeasureTheory/Function/LpSpace/ContinuousCompMeasurePreserving.lean,Mathlib/MeasureTheory/Function/LpSpace/DomAct/Basic.lean,Mathlib/MeasureTheory/Function/LpSpace/Indicator.lean,Mathlib/MeasureTheory/Function/SimpleFuncDenseLp.lean,Mathlib/MeasureTheory/Integral/IntegrableOn.lean,Mathlib/MeasureTheory/Integral/SetToL1.lean,Mathlib/MeasureTheory/Measure/SeparableMeasure.lean 13 25 ['JonBannon', 'github-actions', 'j-loreaux', 'mathlib4-merge-conflict-bot'] urkud
assignee:urkud
128-24451
4 months ago
217-17557
217 days ago
12-73357
12 days
33807 adamtopaz
author:adamtopaz
 feat: TypeCat refactor --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) WIP t-category-theory merge-conflict 114/0 ConstGraph/Main.lean,Mathlib/CategoryTheory/Types/Basic.lean,lakefile.lean 3 2 ['github-actions', 'mathlib4-merge-conflict-bot'] nobody
128-21760
4 months ago
133-5950
133 days ago
0-1
1 second
29610 llllvvuu
author:llllvvuu
 feat(LinearAlgebra): define LinearMap.Eigenbasis Some theorems are left TODO for follow-up work. The definition is from @eric-wieser ([#Is there code for X? > diagonalizable linear maps @ 💬](https://leanprover.zulipchat.com/#narrow/channel/217875-Is-there-code-for-X.3F/topic/diagonalizable.20linear.20maps/near/539163222)). Co-authored-by: Aristotle Harmonic --- - [x] depends on: #29420 (golfs some `[Nontrivial R]` assumptions) - [x] depends on: #29791 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-algebra awaiting-author
label:t-algebra$
 455/5 Mathlib.lean,Mathlib/Analysis/InnerProductSpace/Spectrum.lean,Mathlib/LinearAlgebra/Eigenbasis.lean,Mathlib/LinearAlgebra/FreeModule/PID.lean,Mathlib/Order/CompleteLattice/Basic.lean 5 31 ['github-actions', 'joelriou', 'kckennylau', 'llllvvuu', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] joelriou
assignee:joelriou
128-16054
4 months ago
184-49990
184 days ago
20-33900
20 days
33992 tb65536
author:tb65536
 feat(NumberTheory/NumberField/ExistsRamified): Galois group is generated by inertia subgroups This PR proves that `Gal(K/ℚ)` is generated by its inertia subgroups (because otherwise the fixed field would be an unramified extension of `ℚ`). --- - [x] depends on: #30666 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-number-theory t-algebra merge-conflict blocked-by-other-PR
label:t-algebra$
 101/0 Mathlib/NumberTheory/NumberField/ExistsRamified.lean 1 3 ['github-actions', 'mathlib-dependent-issues', 'mathlib-merge-conflicts'] nobody
127-44584
4 months ago
15-2579
15 days ago
0-8682
2 hours
30582 RemyDegenne
author:RemyDegenne
 feat: extension of a function to the closure of a submodule - define the closure of a set in a complete space as an `AbstractCompletion` - add instances about submodules - add a coercion from a submodule to its topological closure - add induction lemmas on topological closures of submodules - define the extension of a function on a submodule to the closure of a submodule --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-topology WIP merge-conflict 138/1 Mathlib/Topology/Algebra/Module/Basic.lean,Mathlib/Topology/UniformSpace/AbstractCompletion.lean 2 8 ['ADedecker', 'RemyDegenne', 'github-actions', 'mathlib4-merge-conflict-bot', 'mcdoll'] PatrickMassot and mcdoll
assignee:PatrickMassot assignee:mcdoll
127-27908
4 months ago
170-45341
170 days ago
35-55566
35 days
32436 thorimur
author:thorimur
 feat: `unusedFactInType` linter --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-linter 55/3 Mathlib/Init.lean,Mathlib/Tactic/Linter/UnusedInstancesInType.lean 2 2 ['github-actions', 'mathlib4-merge-conflict-bot'] nobody
127-7779
4 months ago
unknown
0-0
0 seconds
33535 erdOne
author:erdOne
 feat(Algebra/Category): `Under.pushout` preserves finite limits for flat homomorphisms --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) awaiting-author t-algebra merge-conflict
label:t-algebra$
 157/5 Mathlib.lean,Mathlib/Algebra/Category/AlgCat/Basic.lean,Mathlib/Algebra/Category/AlgCat/Limits.lean,Mathlib/Algebra/Category/CommAlgCat/BaseChange.lean,Mathlib/Algebra/Category/CommAlgCat/Basic.lean,Mathlib/Algebra/Category/ModuleCat/ChangeOfRings.lean,Mathlib/Algebra/Category/ModuleCat/Limits.lean,Mathlib/Algebra/Category/Ring/Flat.lean 8 5 ['chrisflav', 'erdOne', 'github-actions', 'mathlib-merge-conflicts', 'robin-carlier'] eric-wieser
assignee:eric-wieser
126-84319
4 months ago
127-26022
127 days ago
11-30775
11 days
28631 faenuccio
author:faenuccio
 feat(Data\Nat\ModEq.lean): add grind attribute to ModEq --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) WIP t-data merge-conflict 7/0 Mathlib/Data/Nat/ModEq.lean 1 5 ['faenuccio', 'github-actions', 'leanprover-bot', 'mathlib4-merge-conflict-bot'] nobody
126-66263
4 months ago
276-46638
276 days ago
0-22
22 seconds
30391 rudynicolop
author:rudynicolop
 feat(Data/List): list splitting definitions and lemmas This PR continues the work from #24395. Original PR: https://github.com/leanprover-community/mathlib4/pull/24395 t-data new-contributor awaiting-author 108/2 Mathlib/Data/List/Perm/Lattice.lean,Mathlib/Data/List/TakeDrop.lean 2 50 ['BoltonBailey', 'IlPreteRosso', 'TwoFX', 'Vierkantor', 'github-actions', 'kckennylau', 'mathlib4-merge-conflict-bot', 'rudynicolop'] TwoFX
assignee:TwoFX
126-28742
4 months ago
126-37264
126 days ago
93-10043
93 days
33126 CoolRmal
author:CoolRmal
 feat: function composition preserves boundedness This PR adds the following theorem: if the range of a function `g` is bounded above, then `g ∘ f` is bounded above for all functions `f`. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-order merge-conflict 12/0 Mathlib/Order/Bounds/Basic.lean 1 2 ['github-actions', 'mathlib4-merge-conflict-bot'] bryangingechen
assignee:bryangingechen
126-27209
4 months ago
126-27210
126 days ago
27-6197
27 days
20719 gio256
author:gio256
 feat(AlgebraicTopology): delaborators for truncated simplicial notations We add delaborators for the following notations, introduced in #20688: - `⦋m⦌ₙ`, which denotes the `m`-dimensional simplex in the `n`-truncated simplex category. - `X _⦋m⦌ₙ`, which denotes the `m`-th term of an `n`-truncated simplicial object `X`. - `X ^⦋m⦌ₙ`, which denotes the `m`-th term of an `n`-truncated cosimplicial object `X`. If `pp.proofs` is set to `true`, we also pretty-print the proof `p : m ≤ n` for all three notations as `⦋m, p⦌ₙ`, `X _⦋m, p⦌ₙ`, and `X ^⦋m, p⦌ₙ`, respectively. Credit to @kmill for one piece of code and much metaprogramming inspiration. --- - [x] depends on: #20688 - [x] depends on: #23018 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-algebraic-topology infinity-cosmos t-meta please-adopt will-close-soon 525/33 Mathlib.lean,Mathlib/AlgebraicTopology/SimplexCategory/Basic.lean,Mathlib/AlgebraicTopology/SimplexCategory/Defs.lean,Mathlib/AlgebraicTopology/SimplicialObject/Basic.lean,Mathlib/Tactic.lean,Mathlib/Tactic/SimplexCategory.lean,Mathlib/Util/Superscript.lean,MathlibTest/SimplexCategory.lean,MathlibTest/SimplicialObject.lean,MathlibTest/superscript.lean,scripts/noshake.json 11 24 ['eric-wieser', 'gio256', 'github-actions', 'joneugster', 'kim-em', 'leanprover-community-bot-assistant', 'mathlib4-dependent-issues-bot'] nobody
126-26996
4 months ago
306-4136
306 days ago
88-84229
88 days
31348 PatrickMassot
author:PatrickMassot
 chore: fix a docstring typo --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) documentation awaiting-author t-analysis 1/1 Mathlib/Analysis/Calculus/Darboux.lean 1 3 ['ADedecker', 'dopamine333', 'github-actions'] nobody
126-22939
4 months ago
196-29411
196 days ago
0-21655
6 hours
10991 thorimur
author:thorimur
 feat: `tfae` block tactic This PR introduces `tfae` block tactic syntax: ```lean tfae 1 → 2 := /- proof of `P₁ → P₂` -/ 2 → 3 := /- proof of `P₂ → P₃` -/ 3 → 1 := /- proof of `P₃ → P₁` -/ ``` Like the recent change to `tfae_have`, this syntax also supports all sorts of matching that `have` itself supports: ```lean tfae 2 → 3 | h₂ => /- proof of `P₃` -/ 3 → 1 -- given `P₁ := ∀(a : A), (b : B), (c : C), X`: | h₃, a, b, c => /- proof of `X` -/ ⟨h_mp, h_mpr⟩ : 1 ↔ 2 := /- proof of `P₁ ↔ P₂`; puts `h_mp : P₁ → P₂`, `h_mpr : P₂ → P₁` in the lctx -/ ``` This initial implementation is currently very simple, and relies on `tfae_have` and `tfae_finish`. Although we intend to migrate away from that syntax, this PR does not remove support for it or deprecate `tfae_have`/`tfae_finish` in any way; migration (but not deprecation) is done in #11003. --- - [x] depends on: #10653 - [x] depends on: #10994 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict WIP modifies-tactic-syntax t-meta 392/124 Mathlib/Tactic/TFAE.lean,scripts/noshake.json,test/tfae.lean 3 5 ['github-actions', 'joneugster', 'mathlib4-dependent-issues-bot', 'thorimur'] joneugster
assignee:joneugster
126-12869
4 months ago
609-63138
609 days ago
7-13967
7 days
29282 Jlh18
author:Jlh18
 feat(CategoryTheory): HasColimits instance on Grpd Show that the category of groupoids has all small colimits, as a coreflective subcategory of `Cat`, which has all small colimits. The right adjoint of the forgetful functor is the core functor `CategoryTheory.Core.functor`. - [ ] depends on: #29283 [Core of a category as a functor] --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict blocked-by-other-PR new-contributor t-category-theory 140/4 Mathlib.lean,Mathlib/AlgebraicTopology/FundamentalGroupoid/InducedMaps.lean,Mathlib/CategoryTheory/Category/Grpd.lean,Mathlib/CategoryTheory/Core.lean,Mathlib/CategoryTheory/Groupoid/Grpd/Colimit.lean,Mathlib/CategoryTheory/Groupoid/Grpd/Core.lean 6 3 ['github-actions', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
124-38822
4 months ago
261-70606
261 days ago
0-396
6 minutes
29587 uniwuni
author:uniwuni
 feat(GroupTheory/Finiteness): define finitely generated semigroups We define finitely generated semigroups and basics similarly to monoids and groups and prove that semigroups and monoids remain finitely generated when a congruence is quotiented out. This will be important when further developing semigroup theory. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-group-theory 259/14 Mathlib/Algebra/Group/Submonoid/Defs.lean,Mathlib/GroupTheory/Finiteness.lean 2 4 ['github-actions', 'mathlib4-merge-conflict-bot', 'plp127', 'uniwuni'] dupuisf
assignee:dupuisf
124-38778
4 months ago
226-43682
226 days ago
25-78230
25 days
28796 grunweg
author:grunweg
 feat: immersions are smooth The conventional textbook definition demands that an immersion be smooth. When asking for the immersion to have local slice charts (as we do), this implies smoothness automatically. --- - [x] depends on: #28701 - [x] depends on: #28793 - [x] depends on: #30356 - [x] depends on: #28853 (for simplicity) - [x] depends on: #36816 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-differential-geometry awaiting-author merge-conflict 192/21 Mathlib/Geometry/Manifold/ContMDiff/Atlas.lean,Mathlib/Geometry/Manifold/Immersion.lean,Mathlib/Geometry/Manifold/LocalSourceTargetProperty.lean,Mathlib/Geometry/Manifold/SmoothEmbedding.lean 6 57 ['chrisflav', 'github-actions', 'grunweg', 'mathlib-dependent-issues', 'mathlib-merge-conflicts', 'mathlib4-merge-conflict-bot', 'sgouezel'] PatrickMassot
assignee:PatrickMassot
124-14970
4 months ago
127-15824
127 days ago
0-1863
31 minutes
28905 grunweg
author:grunweg
 feat: immersions are locally embeddings Hopefully, this can be used for the topological portion of #28865. (That part is not certain yet, the rest works.) --- Needs some clean-up in both the immersions file, and need to move the helper results about embeddings to the correct location. - [x] depends on: #28793 - [ ] depends on: #28796 - [x] depends on: #28853 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) blocked-by-other-PR merge-conflict t-differential-geometry 331/15 Mathlib/Analysis/Calculus/ContDiff/Basic.lean,Mathlib/Geometry/Manifold/ContMDiff/Atlas.lean,Mathlib/Geometry/Manifold/Immersion.lean,Mathlib/Geometry/Manifold/IsManifold/Basic.lean,Mathlib/Geometry/Manifold/IsManifold/ExtChartAt.lean,Mathlib/Geometry/Manifold/LocalSourceTargetProperty.lean,Mathlib/Geometry/Manifold/SmoothEmbedding.lean 7 4 ['github-actions', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
124-14969
4 months ago
270-16383
270 days ago
0-397
6 minutes
30504 grunweg
author:grunweg
 feat: add custom elaborators for immersions And golf the fail using it, a bit. Other usage sites expose bugs or unexpected error messages... TODO: add basic tests for basic usage TODO: fix those errors (then try to golf further! --- - [x] depends on: #30307 - [x] depends on: #30356 - [ ] depends on: #28796 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) blocked-by-other-PR t-meta t-differential-geometry merge-conflict 286/87 Mathlib/Analysis/Calculus/ContDiff/Basic.lean,Mathlib/Geometry/Manifold/ContMDiff/Atlas.lean,Mathlib/Geometry/Manifold/Immersion.lean,Mathlib/Geometry/Manifold/IsManifold/ExtChartAt.lean,Mathlib/Geometry/Manifold/LocalSourceTargetProperty.lean,Mathlib/Geometry/Manifold/SmoothEmbedding.lean 6 5 ['github-actions', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
124-14723
4 months ago
221-32953
221 days ago
0-13
13 seconds
32745 LTolDe
author:LTolDe
 feat(Topology/Algebra): add MulActionConst.lean add Topology/Algebra/MulActionConst.lean introduce class `ContinuousSMulConst` for a scalar multiplication that is continuous in the first argument, in analogy to `ContinuousConstSMul` define `MulAction.ball x U` as the set `U • {x}` given `[SMul G X] (x : X) (U : Set G)` The lemmas shown here will be useful to prove the **Effros Theorem**, see [zulip](https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/Effros.20Theorem/with/558712441). --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) awaiting-author new-contributor t-topology 117/0 Mathlib.lean,Mathlib/Topology/Algebra/MulActionConst.lean 2 8 ['LTolDe', 'github-actions', 'urkud'] nobody
123-24688
4 months ago
130-4218
130 days ago
16-33128
16 days
34134 Paul-Lez
author:Paul-Lez
 feat(Mathlib/Analysis/PDE/Quasilinear/Characteristics): the method of characteristics for first order quasilinear PDEs This PR continues the work from #25710. Original PR: https://github.com/leanprover-community/mathlib4/pull/25710 WIP t-analysis 620/0 Mathlib.lean,Mathlib/Analysis/PDE/Quasilinear/Characteristics.lean,Mathlib/Analysis/PDE/Quasilinear/Defs.lean,Mathlib/Topology/MetricSpace/Pseudo/Defs.lean 4 3 ['Paul-Lez', 'github-actions', 'mcdoll'] nobody
122-38626
4 months ago
123-35973
123 days ago
0-146
2 minutes
33478 anishrajeev
author:anishrajeev
 feat(ModelTheory): define a subset of the topology over complete types Define a subset of the Stone Space over a language expanded with countably many constants. Define the proposition to indicate if a language is countable. The subset's density and openness is a future goal to prove (have a branch where it is almost finished), in pursuit of formalizing the proof of the Omitting Types Theorem via properties of Baire spaces. - [ ] depends on: #32215 - [ ] depends on: #32546 t-logic merge-conflict new-contributor blocked-by-other-PR 160/1 Mathlib.lean,Mathlib/ModelTheory/Topology/Types.lean,Mathlib/ModelTheory/Types.lean,Mathlib/Tactic/Linter/DirectoryDependency.lean 4 8 ['NoneMore', 'anishrajeev', 'github-actions', 'mathlib-dependent-issues', 'mathlib4-merge-conflict-bot', 'tb65536'] nobody
122-18207
4 months ago
130-32031
130 days ago
10-38484
10 days
30853 JovanGerb
author:JovanGerb
 feat(LinearAlgebra/AffineSpace/Simplex): `CoeFun` instance for `Simplex` This PR introduces the notation `s i` to refer to the `i`th vertex of simplex `s`, which replaces the current `s.points i`. It does this by adding a `CoeFun` instance. I first tried using `FunLike`, but this came with some different problems related to discrimination tree indexing in `simp`. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) awaiting-author t-euclidean-geometry merge-conflict 381/371 Archive/Imo/Imo2019Q2.lean,Mathlib/Analysis/Convex/Between.lean,Mathlib/Analysis/Normed/Affine/Simplex.lean,Mathlib/Geometry/Euclidean/Altitude.lean,Mathlib/Geometry/Euclidean/Angle/Sphere.lean,Mathlib/Geometry/Euclidean/Circumcenter.lean,Mathlib/Geometry/Euclidean/Incenter.lean,Mathlib/Geometry/Euclidean/MongePoint.lean,Mathlib/Geometry/Euclidean/Projection.lean,Mathlib/Geometry/Euclidean/SignedDist.lean,Mathlib/Geometry/Euclidean/Simplex.lean,Mathlib/LinearAlgebra/AffineSpace/FiniteDimensional.lean,Mathlib/LinearAlgebra/AffineSpace/Simplex/Basic.lean,Mathlib/LinearAlgebra/AffineSpace/Simplex/Centroid.lean,scripts/nolints.json 15 14 ['JovanGerb', 'eric-wieser', 'github-actions', 'jsm28', 'mathlib4-merge-conflict-bot'] jsm28
assignee:jsm28
121-73324
4 months ago
168-25697
168 days ago
41-18647
41 days
34195 eric-wieser
author:eric-wieser
 feat: continuous bundled actions These are `Continuous` versions of existing definitions. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-topology t-algebra large-import
label:t-algebra$
 59/0 Mathlib/Topology/Algebra/ContinuousMonoidHom.lean 1 1 ['github-actions'] nobody
121-48420
4 months ago
65-8545
65 days ago
0-1929
32 minutes
34238 Ruben-VandeVelde
author:Ruben-VandeVelde
 feat: some lemmas about AlgHom 1 and * --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) awaiting-author t-algebra
label:t-algebra$
 22/0 Mathlib/Algebra/Algebra/Hom.lean 1 5 ['Ruben-VandeVelde', 'Vierkantor', 'eric-wieser', 'github-actions'] nobody
120-39492
4 months ago
120-39492
120 days ago
0-45401
12 hours
31092 FlAmmmmING
author:FlAmmmmING
 feat(Algebra/Group/ForwardDiff.lean): Add theorem `sum_shift_eq_fwdDiff_iter`. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra new-contributor delegated
label:t-algebra$
 17/1 Mathlib/Algebra/Group/ForwardDiff.lean 1 20 ['BeibeiX0', 'FlAmmmmING', 'Ruben-VandeVelde', 'dagurtomas', 'github-actions', 'jcommelin', 'mathlib-bors', 'mathlib4-merge-conflict-bot'] nobody
120-25707
4 months ago
120-25707
120 days ago
54-22055
54 days
34141 gululu996-ui
author:gululu996-ui
 feat(Combinatorics/SimpleGraph/Acyclic): finite trees have at least two degree-one vertices Add a lemma showing that a finite tree with at least two vertices has at least two vertices of degree 1. - Introduce a helper lemma `SimpleGraph.Connected.one_le_degree` for connected graphs on a nontrivial finite type. - Prove the leaf-count lower bound via the degree-sum identity and a counting argument. --- awaiting-author new-contributor t-combinatorics 72/2 Mathlib/Combinatorics/SimpleGraph/Acyclic.lean 1 9 ['IvanRenison', 'SnirBroshi', 'github-actions', 'vlad902'] nobody
120-21965
4 months ago
122-3401
122 days ago
1-23617
1 day
29014 ShreckYe
author:ShreckYe
 feat(Data/List/Scan): some theorems that relate `scanl` with `foldl` I am not sure which is the best form of `getElem_scanl_eq_foldl_take` here, so I added several alternative forms. Feel free to remove any of them if necessary. merge-conflict t-data 35/0 Mathlib/Data/List/Scan.lean 1 15 ['ShreckYe', 'github-actions', 'mathlib4-merge-conflict-bot', 'themathqueen', 'vlad902'] pechersky
assignee:pechersky
120-18002
4 months ago
193-69447
193 days ago
74-59834
74 days
33689 BoltonBailey
author:BoltonBailey
 feat(Probability): PMF point mass function This PR defines a pointMass function, which returns the value of a PMF at a point as a `NNReal`. --- Perhaps `unitInterval` would be better? Note: A number of Zulip discussions lists below have discussed what the return type of `PMF` should be and if the definition should be refactored. This PR avoids this by simply creating a new function, but depends on a PR from these discussions to not cause a collision. Zulip: - [#new members > Why is the codomain of PMF in mathlib ENNReal and not NNReal @ 💬](https://leanprover.zulipchat.com/#narrow/channel/113489-new-members/topic/Why.20is.20the.20codomain.20of.20PMF.20in.20mathlib.20ENNReal.20and.20not.20NNReal/near/526572449) - [#new members > Performing arithmetic with ENNReals @ 💬](https://leanprover.zulipchat.com/#narrow/channel/113489-new-members/topic/Performing.20arithmetic.20with.20ENNReals/near/525936290) - [#Is there code for X? > Statistical distance for `PMF`s? @ 💬](https://leanprover.zulipchat.com/#narrow/channel/217875-Is-there-code-for-X.3F/topic/Statistical.20distance.20for.20.60PMF.60s.3F/near/525234190) - [#mathlib4 > PMF Refactor: FunLike vs Definition Change](https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/PMF.20Refactor.3A.20FunLike.20vs.20Definition.20Change/with/567771586) - [ ] depends on: #34138 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-measure-probability WIP blocked-by-other-PR 93/0 Mathlib/Probability/ProbabilityMassFunction/PointMass.lean 1 2 ['github-actions', 'mathlib4-dependent-issues-bot'] nobody
120-9828
4 months ago
unknown
0-0
0 seconds
33680 BoltonBailey
author:BoltonBailey
 feat(Probability/ProbabilityMassFunction): add Total Variation distance Adds the statistical distance/total variation distance. See Zulip discussion: - [#Is there code for X? > total variation distance between two PMFs](https://leanprover.zulipchat.com/#narrow/channel/217875-Is-there-code-for-X.3F/topic/total.20variation.20distance.20between.20two.20PMFs/with/566810511) This PR was authored with the support of Claude Opus 4.5 --- - [ ] depends on: #33689 [provide an API for NNReal-returning function] [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-measure-probability blocked-by-other-PR LLM-generated 47/0 Mathlib/Probability/ProbabilityMassFunction/Distance.lean 1 2 ['github-actions', 'mathlib4-dependent-issues-bot'] nobody
119-57432
3 months ago
119-57580
119 days ago
16-37540
16 days
21476 grunweg
author:grunweg
 feat(lint-style): enable running on downstream projects Enable lint-style to run on downstream projects, by making the following modifications: - allow passing an explicit list of libraries to lint: if nothing is passed, it lints `Mathlib`, `Archive` and `Counterexamples` (as before); otherwise, it lints precisely the passed modules - only check init imports, undocumented scripts and the errors from `lint-style.py` when linting Mathlib - make the style exceptions file configurable and optional: using the `nolints-file` flag, the exceptions file can be configured. If the flag is omitted, we try to find a file at `scripts/nolints-style.txt` --- and otherwise proceed with no style exceptions. This means mathlib can continue unchanged, and downstream projects can either add an explicit exceptions file, or proceed without any exceptions. After this PR, one should be able to run lint-style on a downstream project by `lake exe lint-style ProjectName`. Prompted by [this zulip discussion](https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/lint-style.20for.20downstream.20libraries). --- - [x] depends on: #24570 - [x] depends on: #24953 (I did not test the last part.) [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-linter awaiting-author please-adopt 58/19 Mathlib/Tactic/Linter/TextBased.lean,scripts/lint-style.lean 2 21 ['Vierkantor', 'adomani', 'github-actions', 'grunweg', 'joneugster', 'leanprover-community-bot-assistant', 'mathlib4-dependent-issues-bot'] nobody
119-46731
3 months ago
371-21064
371 days ago
43-17409
43 days
34086 adomani
author:adomani
 perf: test the effect of localizing the whitespace linter This PR checks whether the modification contained in #26299 have a positive effect on this one. The other PR has a few minor regressions, but hopefully this PR has very substantial speed ups. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) large-import merge-conflict 2076/462 Archive/Imo/Imo2010Q5.lean,Archive/Wiedijk100Theorems/BuffonsNeedle.lean,Counterexamples/CliffordAlgebraNotInjective.lean,Counterexamples/HeawoodUnitDistance.lean,Counterexamples/MonicNonRegular.lean,Mathlib/Algebra/AffineMonoid/Basic.lean,Mathlib/Algebra/Category/Grp/EpiMono.lean,Mathlib/Algebra/Module/TransferInstance.lean,Mathlib/Algebra/Order/CauSeq/Basic.lean,Mathlib/Algebra/Polynomial/RuleOfSigns.lean,Mathlib/Algebra/Quaternion.lean,Mathlib/AlgebraicGeometry/EllipticCurve/Jacobian/Basic.lean,Mathlib/AlgebraicGeometry/EllipticCurve/Projective/Formula.lean,Mathlib/AlgebraicTopology/SimplicialSet/CompStructTruncated.lean,Mathlib/AlgebraicTopology/SimplicialSet/Path.lean,Mathlib/AlgebraicTopology/SimplicialSet/StrictSegal.lean,Mathlib/Analysis/CStarAlgebra/ContinuousFunctionalCalculus/Unital.lean,Mathlib/Analysis/Normed/Algebra/Spectrum.lean,Mathlib/Analysis/ODE/PicardLindelof.lean,Mathlib/Analysis/Real/Pi/Bounds.lean,Mathlib/CategoryTheory/Comma/Over/OverClass.lean,Mathlib/CategoryTheory/Limits/Shapes/BinaryProducts.lean,Mathlib/CategoryTheory/Monoidal/Action/Basic.lean,Mathlib/CategoryTheory/Monoidal/Cartesian/CommGrp_.lean,Mathlib/CategoryTheory/Monoidal/Mon_.lean,Mathlib/CategoryTheory/Monoidal/OfHasFiniteProducts.lean,Mathlib/Combinatorics/SetFamily/LYM.lean,Mathlib/Computability/AkraBazzi/AkraBazzi.lean,Mathlib/Computability/ContextFreeGrammar.lean,Mathlib/Computability/Language.lean,Mathlib/Computability/Partrec.lean,Mathlib/Computability/PartrecCode.lean,Mathlib/Data/DFinsupp/Notation.lean,Mathlib/Data/ENNReal/Basic.lean,Mathlib/Data/EReal/Operations.lean,Mathlib/Data/Fin/Fin2.lean,Mathlib/Data/Finset/Slice.lean,Mathlib/Data/Finset/Sort.lean,Mathlib/Data/Finsupp/Notation.lean,Mathlib/Data/Matrix/Cartan.lean,Mathlib/Data/NNReal/Defs.lean,Mathlib/Data/Num/Bitwise.lean,Mathlib/Data/PNat/Xgcd.lean,Mathlib/Data/Sym/Sym2.lean,Mathlib/Data/Vector/MapLemmas.lean,Mathlib/FieldTheory/CardinalEmb.lean,Mathlib/FieldTheory/Finite/Extension.lean,Mathlib/FieldTheory/Laurent.lean,Mathlib/Geometry/Manifold/Notation.lean,Mathlib/GroupTheory/FreeGroup/Reduce.lean,Mathlib/LinearAlgebra/TensorPower/Symmetric.lean,Mathlib/LinearAlgebra/TensorProduct/Basic.lean,Mathlib/MeasureTheory/Function/ConditionalExpectation/PullOut.lean,Mathlib/MeasureTheory/Integral/TorusIntegral.lean,Mathlib/ModelTheory/Syntax.lean,Mathlib/NumberTheory/Niven.lean,Mathlib/Probability/CondVar.lean,Mathlib/Probability/Independence/Conditional.lean,Mathlib/RingTheory/Nilpotent/Exp.lean,Mathlib/Tactic/Linter/DirectoryDependency.lean,Mathlib/Tactic/Linter/Whitespace.lean,Mathlib/Tactic/Ring/NamePolyVars.lean,Mathlib/Topology/Algebra/IsUniformGroup/Defs.lean,Mathlib/Topology/Category/TopCat/Limits/Basic.lean,Mathlib/Topology/Instances/Rat.lean,Mathlib/Util/Superscript.lean,MathlibTest/WhitespaceLinter.lean 67 5 ['adomani', 'github-actions', 'leanprover-radar', 'mathlib4-merge-conflict-bot'] nobody
119-40273
3 months ago
unknown
0-0
0 seconds
34371 grunweg
author:grunweg
 feat: module instance on ContMDiffMap From fpvandoorn and my LeanCourse25. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) WIP t-differential-geometry 117/0 Mathlib/Geometry/Manifold/Algebra/LieGroup.lean 1 2 ['github-actions'] nobody
118-30383
3 months ago
118-34468
118 days ago
0-7
7 seconds
34219 or4nge19
author:or4nge19
 feat(MeasureTheory/BorelSpace): measurability of annuli on (pseudo)(e)metric space it assumes `OpensMeasurableSpace` original [file](https://github.com/fpvandoorn/carleson/blob/master/Carleson/ToMathlib/Annulus.lean) From the Carleson project. Co-authored-by: James Sundstrom [james.sundstrom@gmail.com](mailto:james.sundstrom@gmail.com) --- - [x] depends on: #34200 - [ ] depends on: #34202 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) carleson blocked-by-other-PR t-measure-probability 534/0 Mathlib.lean,Mathlib/MeasureTheory/Constructions/BorelSpace/Annulus.lean,Mathlib/Topology/MetricSpace/Annulus.lean 3 3 ['github-actions', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
117-53348
3 months ago
121-20953
121 days ago
0-236
3 minutes
33132 BoltonBailey
author:BoltonBailey
 feat(Computability): Single-tape TM complexity Currently, time complexity in mathlib is defined in terms of (a kind of) multi-tape Turing machine [Turing.FinTM2](https://leanprover-community.github.io/mathlib4_docs/Mathlib/Computability/TMComputable.html#Turing.FinTM2). This (currently Draft) PR develops time complexity in terms of Single-Tape Turing Machines. There are a few reasons to do this: * Having definitions of time complexity for both single-tape and multi-tape TMs is a prerequisite to prove theorems relating these definitions of complexity (in particular, the theorem that the definition of polynomial time computability is equivalent between these notions). * The Multi-tape "TM2" definition seems to be based on "Wang B-Machines" ([wiki](https://en.wikipedia.org/wiki/Wang_B-machine)) which involves both a program of function labels, as well as a set of states. * I think it's a bit more common to see a simpler presentation of single-tape ([and multitape](https://en.wikipedia.org/wiki/Multitape_Turing_machine)) Turing machines which only provides a set of states. * It seems to me that the B-Machine-like definition makes it a bit complicated to make progress. For example, if I want to compose Turing Machines, then I have to be able to construct a new program and state set, which involves mapping the [Turing.TM2.Stmt](https://leanprover-community.github.io/mathlib4_docs/Mathlib/Computability/TuringMachine.html#Turing.TM2.Stmt) type to the sum type of the tapes. I have to do something similar for single-tape TMs, but the Stmt type is less complicated, so this is less involved. * If we want to continue on and define space complexity, it seems convenient to have only a single tape, so that we don't have to do lots of reasoning over summations. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-computability WIP 1480/0 Mathlib/Computability/BinEncoding.lean,Mathlib/Computability/EncodingTo.lean,Mathlib/Computability/SingleTapeBinTMComputable.lean,Mathlib/Computability/SingleTapeTMComputable.lean 4 1 ['github-actions'] nobody
117-9611
3 months ago
unknown
0-0
0 seconds
34155 zcyemi
author:zcyemi
 feat(Geometry/Euclidean/Triangle): add altitudeFoot lies strictly between endpoints for an obtuse angle --- add `sbtw_orthogonalProjection_of_angle_ge_pi_div_two` t-euclidean-geometry awaiting-author 93/0 Mathlib/Geometry/Euclidean/Triangle.lean 1 4 ['github-actions', 'jsm28'] nobody
116-76486
3 months ago
116-81866
116 days ago
5-82220
5 days
31134 thorimur
author:thorimur
 chore: use `whenLinterActivated` in linters Replaces boilerplate in linters with `whenLinterActivated` or `whenLinterOption` where possible. --- - [ ] depends on: #31133 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) delegated 79/102 Mathlib/Tactic/Linter/CommandRanges.lean,Mathlib/Tactic/Linter/DocPrime.lean,Mathlib/Tactic/Linter/FlexibleLinter.lean,Mathlib/Tactic/Linter/GlobalAttributeIn.lean,Mathlib/Tactic/Linter/HashCommandLinter.lean,Mathlib/Tactic/Linter/Header.lean,Mathlib/Tactic/Linter/Lint.lean,Mathlib/Tactic/Linter/MinImports.lean,Mathlib/Tactic/Linter/Multigoal.lean,Mathlib/Tactic/Linter/OldObtain.lean,Mathlib/Tactic/Linter/PPRoundtrip.lean,Mathlib/Tactic/Linter/Style.lean,Mathlib/Tactic/Linter/UnusedTactic.lean,Mathlib/Tactic/Linter/UpstreamableDecl.lean,Mathlib/Tactic/Linter/Whitespace.lean,Mathlib/Util/CountHeartbeats.lean,scripts/lint-style.lean 17 8 ['github-actions', 'grunweg', 'mathlib-bors', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] grunweg
assignee:grunweg
116-43042
3 months ago
unknown
0-0
0 seconds
34186 faenuccio
author:faenuccio
 feat(GroupTheory/SpecificGroups/Cyclic): a quotient of a cyclic group is cyclic Add the Normal instance for a subgroup of a cyclic group; and derive that every quotient of a cyclic group is cyclic, as an instance. t-group-theory awaiting-author merge-conflict 8/0 Mathlib/GroupTheory/SpecificGroups/Cyclic.lean 1 9 ['erdOne', 'faenuccio', 'github-actions', 'leanprover-radar', 'mathlib-merge-conflicts', 'tb65536'] tb65536
assignee:tb65536
116-30484
3 months ago
117-3867
117 days ago
4-69261
4 days
31836 hanwenzhu
author:hanwenzhu
 chore(MeasureTheory/IntervalIntegral): generalize fundamental theorem of calculus to `HasDerivWithinAt` instead of `HasDerivAt` This PR generalizes `HasDerivAt` to `HasDerivWithinAt`, and `DifferentiableAt` to `DifferentiableOn`, for the fundamental theorem of calculus for interval integrals. I found this during trying to state a skeleton of a proof of a higher-dimensional Taylor's theorem. There, the correct assumption is something like `ContDiffOn n f [[a, b]]`, rather than `∀ x ∈ [[a, b]], ContDiffAt 𝕜 n f [[a, b]] x`, which traces back to this issue. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-analysis t-measure-probability awaiting-author merge-conflict 143/51 Mathlib/Analysis/SpecialFunctions/Integrals/Basic.lean,Mathlib/Analysis/SpecialFunctions/NonIntegrable.lean,Mathlib/MeasureTheory/Constructions/BorelSpace/Order.lean,Mathlib/MeasureTheory/Integral/IntervalIntegral/FundThmCalculus.lean,Mathlib/MeasureTheory/Integral/IntervalIntegral/IntegrationByParts.lean,Mathlib/NumberTheory/AbelSummation.lean,Mathlib/NumberTheory/LSeries/SumCoeff.lean 7 10 ['github-actions', 'hanwenzhu', 'mathlib4-merge-conflict-bot', 'sgouezel'] sgouezel
assignee:sgouezel
116-26836
3 months ago
176-35638
176 days ago
6-17192
6 days
12879 grunweg
author:grunweg
 feat: port ge_or_gt linter from mathlib3 Code works and is essentially green: next step is to split up into separate PRs. Feedback welcome on whether: - all the test changes are good, or I should simply allow it in more cases - if calc blocks need to be explicitly exempt --- - [ ] depends on: #12933 - [ ] depends on: #12934 - [ ] depends on: #12931 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-linter tech debt blocked-by-other-PR 736/319 Archive/Imo/Imo1960Q1.lean,Archive/Imo/Imo1962Q1.lean,Archive/Imo/Imo1988Q6.lean,Archive/Imo/Imo1994Q1.lean,Archive/Imo/Imo2001Q2.lean,Archive/Imo/Imo2005Q3.lean,Archive/Imo/Imo2006Q3.lean,Archive/Imo/Imo2008Q2.lean,Archive/Imo/Imo2008Q3.lean,Archive/Imo/Imo2008Q4.lean,Archive/Imo/Imo2011Q5.lean,Archive/Imo/Imo2019Q4.lean,Archive/Sensitivity.lean,Archive/Wiedijk100Theorems/AreaOfACircle.lean,Archive/Wiedijk100Theorems/BallotProblem.lean,Archive/Wiedijk100Theorems/BirthdayProblem.lean,Archive/Wiedijk100Theorems/CubingACube.lean,Mathlib.lean,Mathlib/Algebra/DualNumber.lean,Mathlib/Algebra/Order/CauSeq/BigOperators.lean,Mathlib/Algebra/Order/Field/Basic.lean,Mathlib/Algebra/Order/Ring/Defs.lean,Mathlib/Algebra/Polynomial/Basic.lean,Mathlib/Algebra/Polynomial/Degree/Definitions.lean,Mathlib/Algebra/Star/CHSH.lean,Mathlib/Analysis/Analytic/Basic.lean,Mathlib/Analysis/Calculus/UniformLimitsDeriv.lean,Mathlib/Analysis/Complex/Hadamard.lean,Mathlib/Analysis/Complex/UpperHalfPlane/Basic.lean,Mathlib/Analysis/InnerProductSpace/Projection.lean,Mathlib/Analysis/Normed/Group/ControlledClosure.lean,Mathlib/Analysis/NormedSpace/MStructure.lean,Mathlib/Analysis/SpecialFunctions/Log/Base.lean,Mathlib/Analysis/SpecialFunctions/Trigonometric/Basic.lean,Mathlib/Combinatorics/SimpleGraph/DegreeSum.lean,Mathlib/Combinatorics/SimpleGraph/LapMatrix.lean,Mathlib/Computability/AkraBazzi/AkraBazzi.lean,Mathlib/Computability/AkraBazzi/GrowsPolynomially.lean,Mathlib/Data/Complex/Basic.lean,Mathlib/Data/FP/Basic.lean,Mathlib/Data/Finset/Basic.lean,Mathlib/Data/Finset/Fold.lean,Mathlib/Data/Finsupp/Notation.lean,Mathlib/Data/Int/Lemmas.lean,Mathlib/Data/Nat/Dist.lean,Mathlib/Data/Nat/Lattice.lean,Mathlib/Data/Nat/Parity.lean,Mathlib/Data/Nat/Upto.lean,Mathlib/Data/Ordmap/Ordset.lean,Mathlib/Data/PNat/Basic.lean,Mathlib/Data/UInt.lean,Mathlib/GroupTheory/Coxeter/Length.lean,Mathlib/MeasureTheory/Constructions/Polish.lean,Mathlib/MeasureTheory/Covering/Besicovitch.lean,Mathlib/MeasureTheory/Covering/Vitali.lean,Mathlib/MeasureTheory/Covering/VitaliFamily.lean,Mathlib/MeasureTheory/Integral/Layercake.lean,Mathlib/NumberTheory/LegendreSymbol/JacobiSymbol.lean,Mathlib/NumberTheory/Padics/Hensel.lean,Mathlib/NumberTheory/Padics/PadicNorm.lean,Mathlib/NumberTheory/PellMatiyasevic.lean,Mathlib/NumberTheory/Rayleigh.lean,Mathlib/Order/Filter/AtTopBot.lean,Mathlib/Probability/Process/Stopping.lean,Mathlib/RingTheory/Adjoin/Basic.lean,Mathlib/RingTheory/Polynomial/Basic.lean,Mathlib/SetTheory/Ordinal/Notation.lean,Mathlib/Tactic.lean,Mathlib/Tactic/CancelDenoms/Core.lean,Mathlib/Tactic/Common.lean,Mathlib/Tactic/IntervalCases.lean,Mathlib/Tactic/Linarith/Datatypes.lean,Mathlib/Tactic/Linarith/Lemmas.lean,Mathlib/Tactic/Linarith/Oracle/FourierMotzkin.lean,Mathlib/Tactic/Linter/GeOrGt.lean,Mathlib/Tactic/Linter/Style.lean,Mathlib/Tactic/NormNum/GCD.lean,Mathlib/Tactic/NormNum/Inv.lean,Mathlib/Tactic/Ring/Basic.lean,Mathlib/Topology/Category/Profinite/Nobeling.lean,Mathlib/Topology/ContinuousFunction/Bounded.lean,Mathlib/Topology/MetricSpace/CauSeqFilter.lean,Mathlib/Topology/MetricSpace/Cauchy.lean,Mathlib/Topology/MetricSpace/Closeds.lean,Mathlib/Topology/Sequences.lean,scripts/lint-style.py,test/Explode.lean,test/GCongr/inequalities.lean,test/GeOrGt.lean,test/LibrarySearch/IsCompact.lean,test/LibrarySearch/basic.lean,test/Recall.lean,test/Rify.lean,test/Use.lean,test/cancel_denoms.lean,test/congr.lean,test/delabLinearIndependent.lean,test/delaborators.lean,test/interval_cases.lean,test/linarith.lean 109 4 ['github-actions', 'grunweg', 'urkud'] nobody
116-4312
3 months ago
737-5306
737 days ago
0-15256
4 hours
29953 slashbade
author:slashbade
 feat: add reap for experiment --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor 40/3 Cache/IO.lean,Mathlib/Tactic/Common.lean,Mathlib/Tactic/Linter/DirectoryDependency.lean,lake-manifest.json,lakefile.lean 5 3 ['github-actions', 'mathlib4-merge-conflict-bot'] nobody
115-14490
3 months ago
unknown
0-0
0 seconds
33110 dagurtomas
author:dagurtomas
 feat(CategoryTheory): adjoint functor theorems for presentable categories --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) WIP t-category-theory 214/5 Mathlib/CategoryTheory/Adjunction/AdjointFunctorTheorems.lean,Mathlib/CategoryTheory/Presentable/AdjointFunctorTheorems.lean 2 2 ['github-actions', 'joelriou'] nobody
115-1917
3 months ago
153-85605
153 days ago
0-5
5 seconds
8608 eric-wieser
author:eric-wieser
 feat: multiplicativize `AddTorsor` --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict WIP t-algebra please-adopt
label:t-algebra$
 268/199 Mathlib/Algebra/AddTorsor.lean,Mathlib/Algebra/Group/Defs.lean,Mathlib/Data/Set/Pointwise/SMul.lean,Mathlib/Tactic/ToAdditive.lean 4 2 ['alreadydone'] nobody
114-77590
3 months ago
unknown
0-0
0 seconds
34278 gasparattila
author:gasparattila
 feat(Topology/Sets): connectedness of `NonemptyCompacts` --- - [x] depends on: #34268 - [ ] depends on: #34273 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-topology blocked-by-other-PR merge-conflict 434/17 Mathlib/Topology/Sets/VietorisTopology.lean 4 6 ['github-actions', 'mathlib-merge-conflicts', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
114-30228
3 months ago
119-86382
119 days ago
0-1194
19 minutes
34280 gasparattila
author:gasparattila
 feat(Topology/Sets): local connectedness of `(Nonempty)Compacts` --- - [ ] depends on: #34278 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-topology blocked-by-other-PR merge-conflict 493/17 Mathlib/Topology/Sets/VietorisTopology.lean 4 6 ['github-actions', 'mathlib-merge-conflicts', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
114-27966
3 months ago
119-86385
119 days ago
0-235
3 minutes
28017 eric-wieser
author:eric-wieser
 feat: generalize some opnorm lemmas to seminormed spaces --- - [ ] depends on: #28014 - [ ] depends on: #28101 - [ ] depends on: #29120 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict WIP t-analysis 60/24 Mathlib/Analysis/NormedSpace/OperatorNorm/NNNorm.lean,Mathlib/Analysis/NormedSpace/Real.lean 2 5 ['github-actions', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
114-6833
3 months ago
289-82489
289 days ago
0-1
1 second
31377 CoolRmal
author:CoolRmal
 feat: a series of smooth functions that converges (locally) uniformly is smooth The main theorem is the proof that an infinite sum of $C^n$ functions on a one-dimensional domain which converges locally uniformly is $C^n$ and related results. This should be compared with [contDiff_tsum](https://leanprover-community.github.io/mathlib4_docs/Mathlib/Analysis/Calculus/SmoothSeries.html#contDiff_tsum) where the same result is proved for functions on an arbitrary domain but with a slightly stronger convergence assumption. The main motivation for this PR is the [#mathlib4 > Tychonov's Counterexample for the Heat Equation](https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/Tychonov's.20Counterexample.20for.20the.20Heat.20Equation/with/547367912). --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-topology new-contributor awaiting-author merge-conflict 110/18 Mathlib/Analysis/Calculus/SmoothSeries.lean,Mathlib/Analysis/SpecialFunctions/Trigonometric/Cotangent.lean,Mathlib/NumberTheory/ModularForms/EisensteinSeries/QExpansion.lean,Mathlib/Topology/Algebra/InfiniteSum/TsumUniformlyOn.lean,Mathlib/Topology/Algebra/InfiniteSum/UniformOn.lean 5 20 ['CoolRmal', 'github-actions', 'mathlib4-merge-conflict-bot', 'ocfnash', 'sgouezel'] ocfnash
assignee:ocfnash
114-4063
3 months ago
175-21028
175 days ago
8-14942
8 days
26158 upobir
author:upobir
 feat(NumberTheory/Divisors): add int divisors This PR continues the work from #25209. Original PR: https://github.com/leanprover-community/mathlib4/pull/25209 awaiting-author t-number-theory merge-conflict 101/2 Mathlib/NumberTheory/Divisors.lean 1 38 ['MichaelStollBayreuth', 'github-actions', 'mathlib-merge-conflicts', 'mathlib4-merge-conflict-bot', 'upobir'] mariainesdff
assignee:mariainesdff
113-56786
3 months ago
291-27988
291 days ago
46-1067
46 days
32865 robertmaxton42
author:robertmaxton42
 (WIP) Separation axioms --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) large-import merge-conflict 4439/13 Mathlib.lean,Mathlib/CategoryTheory/LiftingProperties/Basic.lean,Mathlib/CategoryTheory/Limits/Shapes/ConcreteCategory.lean,Mathlib/Data/Set/Basic.lean,Mathlib/Data/Set/Disjoint.lean,Mathlib/Data/Set/Image.lean,Mathlib/Data/Set/Lattice.lean,Mathlib/Data/Set/Operations.lean,Mathlib/Order/BooleanAlgebra/Set.lean,Mathlib/Topology/AlexandrovDiscrete.lean,Mathlib/Topology/Category/Lifting/Defs.lean,Mathlib/Topology/Category/Lifting/Separation.lean,Mathlib/Topology/Category/TopCat/Basic.lean,Mathlib/Topology/Category/TopCat/Limits/Basic.lean,Mathlib/Topology/Category/TopCat/Limits/Pullbacks.lean,Mathlib/Topology/Category/UProp.lean,Mathlib/Topology/Coherent.lean,Mathlib/Topology/Constructions.lean,Mathlib/Topology/ContinuousMap/Basic.lean,Mathlib/Topology/ContinuousMap/Constructions.lean,Mathlib/Topology/Inseparable.lean,Mathlib/Topology/Maps/Basic.lean,Mathlib/Topology/Order.lean,Mathlib/Topology/Order/UpperLowerSetTopology.lean,Mathlib/Topology/SeparatedMap.lean,Mathlib/Topology/Separation/GDelta.lean,Mathlib/Topology/Separation/Regular.lean,Mathlib/Topology/UnitInterval.lean,Mathlib/Topology/UrysohnsLemma.lean,docs/references.bib 30 2 ['github-actions', 'mathlib4-merge-conflict-bot'] nobody
113-42183
3 months ago
unknown
0-0
0 seconds
33031 chiyunhsu
author:chiyunhsu
 feat(Combinatorics/Enumerative/Partition): add combinatorial proof of Euler's partition theorem The new file EulerComb.lean contains the combinatorial proof of Euler's partition theorem. The analytic proof of the theorem and its generalization of Glaisher's Theorem has already been formalized in [Glaisher.lean](https://github.com/leanprover-community/mathlib4/blob/master/Mathlib/Combinatorics/Enumerative/Partition/Glaisher.lean). The generalization of the combinatorial proof from this file to Glaisher's Theorem is within reach. --- Zulip discussion: [#mathlib4 > Glaisher’s Bijection on integer partitions](https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/Glaisher.E2.80.99s.20Bijection.20on.20integer.20partitions/with/570808111) [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-combinatorics new-contributor awaiting-zulip awaiting-author 531/0 Mathlib.lean,Mathlib/Combinatorics/Enumerative/Partition/EulerComb.lean 2 7 ['chiyunhsu', 'dagurtomas', 'github-actions', 'tb65536', 'vihdzp'] b-mehta
assignee:b-mehta
113-27584
3 months ago
113-27584
113 days ago
42-21618
42 days
27835 edegeltje
author:edegeltje
 feat(Tactic): ring modulo a given characteristic This PR extends the `ring` tactic with a new config argument `char` which will try to reduce all constant terms modulo the given characteristic. This allows `ring` to prove e.g. `(x + y)^3 = x^3 + y^3` in characteristic 3. This is a simpler and faster way to do so than what we had before: `repeat { ring; reduce_mod_char }` becomes `ring (config := { char := 3 })`. The first step is to split off the required `CharP` definitions, since `Mathlib.Algebra.CharP.Basic` already requires the `ring` tactic. To perform the reduction modulo the given characteristic, I implemented `reduceCast` which reduces a raw integer, and wrapped it in `reduceResult` that takes a `NormNum.Result` for easy use. We need to pass through quite a few parameters into `reduceResult` so maybe it's worth defining a structure, or reusing `Cache` for this. Then it's basically a case of replacing every place where `ring` constructs a numeral with a call to `reduceResult`. Limitations: * `ring` doesn't attempt to detect the characteristic by itself, you need to pass it in explicitly. Trying to infer a `CharP` instance at each point sounds quite expensive. * Since the support for `%` in `NormNum` only exists for integers, I implemented the reduction only when a `Ring` instance is available. It is still sound in the semiring case, just not complete. * We could optimize exponentiation in the specific case where the characteristic `p` is a prime that divides the exponent `n`: `(x + y)^n = x^n + y^n`. I'll leave that to future work. --- This used to be #10765 by Anne Baanen before the great forkening. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict large-import migrated-from-branch t-meta awaiting-author WIP 312/133 Mathlib/LinearAlgebra/Eigenspace/Basic.lean,Mathlib/RingTheory/MvPolynomial/Basic.lean,Mathlib/Tactic/LinearCombination.lean,Mathlib/Tactic/Module.lean,Mathlib/Tactic/Polyrith.lean,Mathlib/Tactic/Ring/Basic.lean,Mathlib/Tactic/Ring/Compare.lean,Mathlib/Tactic/Ring/RingNF.lean,MathlibTest/ring_compare.lean,MathlibTest/ring_mod_char.lean 10 14 ['edegeltje', 'github-actions', 'joneugster', 'mathlib4-merge-conflict-bot'] joneugster
assignee:joneugster
113-26230
3 months ago
281-80339
281 days ago
11-83928
11 days
33954 or4nge19
author:or4nge19
 feat(CategoryTheory/Abelian): add Filtration API Filtered objects in an abelian category (Deligne, *Théorie de Hodge II*, §1.1). inspired by a [message](https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/Proposal.3A.20Complexifications.20with.20a.20view.20towards.20Hodge.20theory/near/565511365) by Joel Riou Co-authored-by: Jonathan Washburn --- PR 1/4 Next PRs will cover Opposed filtrations (Deligne, *Théorie de Hodge II*, §1.2.1–§1.2.3). Induced filtrations on graded pieces (Deligne, *Théorie de Hodge II*, §1.2.1). [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-category-theory awaiting-author 356/0 Mathlib.lean,Mathlib/CategoryTheory/Filtration/Basic.lean,docs/references.bib 3 12 ['dagurtomas', 'github-actions', 'joelriou', 'or4nge19'] nobody
113-16831
3 months ago
113-16992
113 days ago
3-29113
3 days
34092 staroperator
author:staroperator
 feat(SetTheory/ZFC): properties of `ZFSet.omega` --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-set-theory awaiting-author 77/10 Mathlib/SetTheory/ZFC/Basic.lean,Mathlib/SetTheory/ZFC/Ordinal.lean,Mathlib/SetTheory/ZFC/PSet.lean 3 31 ['Komyyy', 'YaelDillies', 'github-actions', 'mathlib4-merge-conflict-bot', 'staroperator', 'vihdzp'] YaelDillies
assignee:YaelDillies
113-11236
3 months ago
25-49368
25 days ago
99-2887
99 days
34575 urkud
author:urkud
 feat(Integral/Pi): add more convenience API --- It's some old code I want to revive&merge. I'll change it from draft when it's ready for review. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-measure-probability 406/1 Mathlib/MeasureTheory/Integral/Pi.lean 1 1 ['github-actions'] nobody
113-5273
3 months ago
113-26137
113 days ago
0-22
22 seconds
33817 FlAmmmmING
author:FlAmmmmING
 fix(Combinatorics/Enumerative/Schroder): fix the definition of `smallSchroder` In the previous definition, the small Schröder numbers were defined as ```LaTeX s_0 = 1, s_1 = 1, s_2 = 1, s_3 = 3... ``` , which does not match the sequence listed in OEIS A006318. Moreover, this definition makes it difficult to correctly write the generating function for the small Schröder numbers. This PR fixes this issue. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor t-combinatorics large-import awaiting-author 61/39 Mathlib/Combinatorics/Enumerative/Schroder.lean 1 20 ['FlAmmmmING', 'YaelDillies', 'github-actions', 'vihdzp'] YaelDillies
assignee:YaelDillies
112-75678
3 months ago
57-58299
57 days ago
74-53798
74 days
34130 FlAmmmmING
author:FlAmmmmING
 feat(Combinatorics/SimpleGraph/Acyclic): Add new theorem `isTree_iff_uniqueShortest_path` --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) awaiting-author t-combinatorics new-contributor 28/1 Mathlib/Combinatorics/SimpleGraph/Acyclic.lean 1 9 ['IvanRenison', 'github-actions', 'metakunt', 'vlad902'] nobody
112-49991
3 months ago
121-34006
121 days ago
2-6389
2 days
34487 martinwintermath
author:martinwintermath
 feat(LinearAlgebra/SesquilinearForm): add instances for SeparatingLeft, SeparatingRight and Nondegenerate Add typeclass instances for `Fact B.SeparatingLeft`, `Fact B.SeparatingRight`, `Fact B.Nondegenerate`: * inferring `Fact B.flip.SeparatingLeft` from `Fact B.SeparatingRight` and vice versa * inferring `Fact B.SeparatingLeft` and `Fact B.SeparatingRight` from `Fact B.Nondegenerate` * inferring `Fact B.SeparatingLeft` and `Fact B.Nondegenerate` for `.id` and `Dual.eval` * inferring `Fact B.Nondegenerate` from `B.IsPerfPair` I also updated `PointedCone.dual_univ` to demonstrate the usefulness of these additions. Note that I needed to add an import to `Cone/Dual.lean` which somehow imports cardinals. So I needed to remove cardinals from `assert_not_exists`. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra new-contributor large-import merge-conflict
label:t-algebra$
 67/12 Mathlib/Geometry/Convex/Cone/Dual.lean,Mathlib/LinearAlgebra/Dual/Lemmas.lean,Mathlib/LinearAlgebra/PerfectPairing/Basic.lean,Mathlib/LinearAlgebra/SesquilinearForm/Basic.lean 2 4 ['github-actions', 'martinwintermath', 'mathlib-merge-conflicts', 'mathlib4-merge-conflict-bot'] joelriou
assignee:joelriou
112-36645
3 months ago
53-22982
53 days ago
13-75766
13 days
32872 JovanGerb
author:JovanGerb
 feat(Data/Real/Basic): don't expose the definition of `Real` This PR refactors the definition of `Real` using the module system, so that `Real` cannot be seen as a structure anymore. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-data merge-conflict 141/250 Archive/Imo/Imo2013Q5.lean,Archive/Wiedijk100Theorems/BuffonsNeedle.lean,Counterexamples/SeminormLatticeNotDistrib.lean,Counterexamples/TopologistsSineCurve.lean,Mathlib/Analysis/SpecialFunctions/Gaussian/GaussianIntegral.lean,Mathlib/Data/Real/Basic.lean,MathlibTest/Complex.lean,MathlibTest/Continuity.lean,MathlibTest/Quaternion.lean,MathlibTest/Real.lean 10 3 ['github-actions', 'mathlib4-merge-conflict-bot'] nobody
112-7526
3 months ago
159-37325
159 days ago
0-1695
28 minutes
34096 urkud
author:urkud
 chore(EMetric/*): rename theorems --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict 789/737 Mathlib/Analysis/Analytic/Basic.lean,Mathlib/Analysis/Analytic/Binomial.lean,Mathlib/Analysis/Analytic/CPolynomial.lean,Mathlib/Analysis/Analytic/CPolynomialDef.lean,Mathlib/Analysis/Analytic/ChangeOrigin.lean,Mathlib/Analysis/Analytic/Composition.lean,Mathlib/Analysis/Analytic/Constructions.lean,Mathlib/Analysis/Analytic/ConvergenceRadius.lean,Mathlib/Analysis/Analytic/Inverse.lean,Mathlib/Analysis/Analytic/IteratedFDeriv.lean,Mathlib/Analysis/Analytic/Uniqueness.lean,Mathlib/Analysis/Analytic/Within.lean,Mathlib/Analysis/BoxIntegral/Basic.lean,Mathlib/Analysis/Calculus/FDeriv/Analytic.lean,Mathlib/Analysis/Calculus/FDeriv/Measurable.lean,Mathlib/Analysis/Calculus/IteratedDeriv/ConvergenceOnBall.lean,Mathlib/Analysis/Complex/CauchyIntegral.lean,Mathlib/Analysis/Complex/TaylorSeries.lean,Mathlib/Analysis/Convex/EGauge.lean,Mathlib/Analysis/InnerProductSpace/Projection/Minimal.lean,Mathlib/Analysis/Normed/Algebra/Exponential.lean,Mathlib/Analysis/Normed/Algebra/Spectrum.lean,Mathlib/Analysis/Normed/Group/Basic.lean,Mathlib/Analysis/Normed/Group/Bounded.lean,Mathlib/Analysis/Normed/Group/InfiniteSum.lean,Mathlib/Analysis/Normed/Group/SeparationQuotient.lean,Mathlib/Analysis/Normed/Group/Uniform.lean,Mathlib/Analysis/Normed/Lp/PiLp.lean,Mathlib/Analysis/Normed/Module/Connected.lean,Mathlib/Analysis/Normed/Module/FiniteDimension.lean,Mathlib/Analysis/Normed/Operator/Completeness.lean,Mathlib/Analysis/Oscillation.lean,Mathlib/Analysis/SpecialFunctions/Exponential.lean,Mathlib/Analysis/SpecificLimits/Normed.lean,Mathlib/Geometry/Manifold/PartitionOfUnity.lean,Mathlib/Geometry/Manifold/Riemannian/Basic.lean,Mathlib/MeasureTheory/Constructions/BorelSpace/Metric.lean,Mathlib/MeasureTheory/Constructions/Polish/Basic.lean,Mathlib/MeasureTheory/Covering/Differentiation.lean,Mathlib/MeasureTheory/Function/ContinuousMapDense.lean,Mathlib/MeasureTheory/Function/ConvergenceInMeasure.lean,Mathlib/MeasureTheory/Function/Egorov.lean,Mathlib/MeasureTheory/Function/LpSpace/Complete.lean,Mathlib/MeasureTheory/Function/SimpleFuncDense.lean,Mathlib/MeasureTheory/Integral/IntegralEqImproper.lean,Mathlib/MeasureTheory/Measure/Lebesgue/Basic.lean,Mathlib/MeasureTheory/Measure/OpenPos.lean,Mathlib/NumberTheory/ModularForms/QExpansion.lean,Mathlib/NumberTheory/Padics/PadicNumbers.lean,Mathlib/Topology/Algebra/MetricSpace/Lipschitz.lean,Mathlib/Topology/Baire/CompleteMetrizable.lean,Mathlib/Topology/ContinuousMap/Bounded/Basic.lean,Mathlib/Topology/EMetricSpace/Basic.lean,Mathlib/Topology/EMetricSpace/Defs.lean,Mathlib/Topology/EMetricSpace/Diam.lean,Mathlib/Topology/EMetricSpace/Lipschitz.lean,Mathlib/Topology/EMetricSpace/Paracompact.lean,Mathlib/Topology/Instances/ENNReal/Lemmas.lean,Mathlib/Topology/MetricSpace/Basic.lean,Mathlib/Topology/MetricSpace/Bounded.lean,Mathlib/Topology/MetricSpace/CantorScheme.lean,Mathlib/Topology/MetricSpace/Cauchy.lean,Mathlib/Topology/MetricSpace/Closeds.lean,Mathlib/Topology/MetricSpace/Contracting.lean,Mathlib/Topology/MetricSpace/Cover.lean,Mathlib/Topology/MetricSpace/Dilation.lean,Mathlib/Topology/MetricSpace/Gluing.lean,Mathlib/Topology/MetricSpace/HausdorffDistance.lean,Mathlib/Topology/MetricSpace/Holder.lean,Mathlib/Topology/MetricSpace/IsometricSMul.lean,Mathlib/Topology/MetricSpace/Isometry.lean,Mathlib/Topology/MetricSpace/PartitionOfUnity.lean,Mathlib/Topology/MetricSpace/Perfect.lean,Mathlib/Topology/MetricSpace/Polish.lean,Mathlib/Topology/MetricSpace/Pseudo/Basic.lean,Mathlib/Topology/MetricSpace/Pseudo/Defs.lean,Mathlib/Topology/MetricSpace/Snowflaking.lean,Mathlib/Topology/Metrizable/CompletelyMetrizable.lean,Mathlib/Topology/UniformSpace/Cauchy.lean,Mathlib/Topology/UniformSpace/Real.lean 80 3 ['github-actions', 'mathlib4-merge-conflict-bot'] nobody
112-7275
3 months ago
unknown
0-0
0 seconds
26087 grunweg
author:grunweg
 feat: a `SliceModel` typeclass for models with corners for embedded submanifolds We define a new typeclass to denote a model with corners which "embeds" into another one: there are an embedding of the underlying topological spaces and a continuous linear inclusion between the normed spaces, which are compatible with the maps given by the models with corners. This condition is used for defining smooth (immersed and embedded) submanifolds: for `M` to be a submanifold of `N`, to boot their models with corners should be slice models. This will be defined in a future PR. To prove this definition is workable, we construct many basic instances of slice models - each model with corners is one over itself - slice models are transitive - each model with corners I embeds into two products `I.prod J` and `J.prod I` - Euclidean n-half-space embeds into Euclidean n-space - a Euclidean n-quadrant embeds into Euclidean half-space (hence into Euclidean n-space) - if n\leq m, Euclidean n-space embeds into Euclidean m-space [zulip discussion](https://leanprover.zulipchat.com/#narrow/channel/116395-maths/topic/Infinite-dimensional.20manifolds/near/413117885) ----------- - [x] depends on: #26083 - [x] depends on: #26082 - [x] depends on: #26086 - [x] depends on: #25705 This PR continues the work from #25505. t-differential-geometry 234/0 Mathlib.lean,Mathlib/Geometry/Manifold/SliceModel.lean 2 4 ['github-actions', 'grunweg', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
112-3109
3 months ago
332-11830
332 days ago
0-12097
3 hours
34028 floor-licker
author:floor-licker
 feat(SimpleGraph): add max-flow/min-cut weak duality This PR introduces a basic s–t flow setup for undirected SimpleGraphs and proves the standard weak-duality inequality: for any feasible flow f and any s–t cut S, value f ≤ cutCapacity S. This is a small, self-contained lemma I extracted while working on larger graph-theoretic formalizations, in particular, results that will ultimately rely on a full max-flow/min-cut theorem. The full MFMC equality/existence statement is not included here. This is the weak-duality direction (∀ f S, value f ≤ cutCapacity S). t-combinatorics new-contributor 169/0 Mathlib.lean,Mathlib/Combinatorics/SimpleGraph/Connectivity/MaxFlowMinCut.lean 2 14 ['SnirBroshi', 'floor-licker', 'github-actions', 'mathlib-merge-conflicts'] kmill
assignee:kmill
111-75685
3 months ago
63-12814
63 days ago
61-8543
61 days
25841 mitchell-horner
author:mitchell-horner
 feat(Combinatorics/SimpleGraph): prove the Kővári–Sós–Turán theorem Prove the Kővári–Sós–Turán theorem (an upper bound on the Zarankiewicz function) --- - [x] depends on: #19865 - [x] depends on: #20738 - [x] depends on: #27602 - [ ] depends on: #34633 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) --- *This PR continues the work from #20240.* *Original PR: https://github.com/leanprover-community/mathlib4/pull/20240* t-combinatorics blocked-by-other-PR 484/0 Mathlib.lean,Mathlib/Combinatorics/SimpleGraph/Extremal/KovariSosTuran.lean,Mathlib/Combinatorics/SimpleGraph/Extremal/Zarankiewicz.lean,Mathlib/Combinatorics/SimpleGraph/Maps.lean,docs/1000.yaml 6 12 ['SnirBroshi', 'github-actions', 'mathlib-merge-conflicts', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot', 'mitchell-horner'] kmill
assignee:kmill
111-66517
3 months ago
111-69680
111 days ago
37-76880
37 days
31582 ADedecker
author:ADedecker
 chore: more flavours of derivatives within the empty set --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-analysis awaiting-CI merge-conflict 33/11 Mathlib/Analysis/Analytic/Basic.lean,Mathlib/Analysis/Analytic/Constructions.lean,Mathlib/Analysis/Analytic/ConvergenceRadius.lean,Mathlib/Analysis/Analytic/Within.lean,Mathlib/Analysis/Calculus/FDeriv/Basic.lean,Mathlib/Analysis/Calculus/FDeriv/Const.lean 6 5 ['github-actions', 'grunweg', 'mathlib4-merge-conflict-bot'] grunweg
assignee:grunweg
111-52840
3 months ago
unknown
0-0
0 seconds
34106 ADedecker
author:ADedecker
 feat: map a seminorm along a surjective linear map --- - [x] depends on: #34105 - [x] depends on: #34104 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict 501/43 Mathlib/Algebra/Order/Group/Pointwise/Bounds.lean,Mathlib/Analysis/Normed/Group/Quotient.lean,Mathlib/Analysis/Normed/Group/QuotientSeminorm.lean,Mathlib/Analysis/Normed/Group/Seminorm.lean,Mathlib/Order/ConditionallyCompleteLattice/Basic.lean,Mathlib/Order/GaloisConnection/Basic.lean 6 3 ['github-actions', 'mathlib-merge-conflicts', 'mathlib4-dependent-issues-bot'] nobody
111-19220
3 months ago
unknown
0-0
0 seconds
32609 PrParadoxy
author:PrParadoxy
 feat(LinearAlgebra/PiTensorProduct): Relation between nested tensor products and tensor products indexed by dependent sums Product tensors in `⨂ j : (Σ i, β i), s j.fst j.snd` can be mapped to product tensors in `⨂ i, ⨂ b : β i, s i b`. If the outer index type is finite, the two types are equivalent. This allows the definition of endomorphisms on PiTensorProducts by specifying them on disjoint subsets of the index set. Such constructions are common e.g. in quantum circuits, quantum cellular automata, and renormalization procedures. --- WIP. This PR contains two "requests for comments". Essentially: * Is a single complex-to-define linear equivalence preferable over several less complex ones, which might however be of limited interest by themselves? * Which trade-offs are appropriate to make things computable? - [ ] depends on: #32608 - [x] depends on: #32600 - [x] depends on: #32598 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor blocked-by-other-PR merge-conflict t-algebra
label:t-algebra$
 683/0 Mathlib.lean,Mathlib/Data/Sigma/Basic.lean,Mathlib/LinearAlgebra/Multilinear/Basic.lean,Mathlib/LinearAlgebra/PiTensorProduct/Nested.lean,Mathlib/LinearAlgebra/PiTensorProduct/Set.lean 5 5 ['github-actions', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
111-1396
3 months ago
165-1834
165 days ago
0-2004
33 minutes
29000 JovanGerb
author:JovanGerb
 feat(Tactic/Push): add basic tags and tests This PR adds basic `@[push]` tags, and expands the `push` test file. --- - [ ] depends on: #21965 - [ ] depends on: #30038 - [ ] depends on: #30039 - [ ] depends on: #30042 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict blocked-by-other-PR t-meta 290/196 Archive/Imo/Imo1988Q6.lean,Archive/ZagierTwoSquares.lean,Counterexamples/Phillips.lean,Mathlib/Algebra/Group/Action/Pointwise/Set/Basic.lean,Mathlib/Algebra/Group/Pointwise/Finset/Basic.lean,Mathlib/Algebra/Group/Pointwise/Set/Basic.lean,Mathlib/Algebra/Group/Pointwise/Set/ListOfFn.lean,Mathlib/Algebra/Module/ZLattice/Basic.lean,Mathlib/Algebra/MonoidAlgebra/Degree.lean,Mathlib/Algebra/Notation/Pi/Defs.lean,Mathlib/Algebra/Order/Module/HahnEmbedding.lean,Mathlib/Algebra/Polynomial/Basic.lean,Mathlib/Analysis/Analytic/IsolatedZeros.lean,Mathlib/Analysis/LocallyConvex/WithSeminorms.lean,Mathlib/Analysis/Oscillation.lean,Mathlib/Analysis/SpecialFunctions/Log/Basic.lean,Mathlib/Analysis/SpecialFunctions/Log/PosLog.lean,Mathlib/CategoryTheory/Galois/Basic.lean,Mathlib/Combinatorics/Colex.lean,Mathlib/Combinatorics/Enumerative/InclusionExclusion.lean,Mathlib/Combinatorics/Hall/Finite.lean,Mathlib/Combinatorics/Matroid/Dual.lean,Mathlib/Combinatorics/SimpleGraph/Clique.lean,Mathlib/Data/Analysis/Filter.lean,Mathlib/Data/Finset/BooleanAlgebra.lean,Mathlib/Data/Finset/Card.lean,Mathlib/Data/Finset/Defs.lean,Mathlib/Data/Finset/Empty.lean,Mathlib/Data/Finset/Filter.lean,Mathlib/Data/Finset/Insert.lean,Mathlib/Data/Finset/Lattice/Basic.lean,Mathlib/Data/Finset/Max.lean,Mathlib/Data/Finset/Powerset.lean,Mathlib/Data/Finset/SDiff.lean,Mathlib/Data/Finset/Sups.lean,Mathlib/Data/Finset/Union.lean,Mathlib/Data/Fintype/Defs.lean,Mathlib/Data/Nat/Cast/Basic.lean,Mathlib/Data/Nat/Lattice.lean,Mathlib/Data/Nat/PrimeFin.lean,Mathlib/Data/Real/Archimedean.lean,Mathlib/Data/Set/Basic.lean,Mathlib/Data/Set/Insert.lean,Mathlib/Data/Set/Operations.lean,Mathlib/Data/Set/Prod.lean,Mathlib/GroupTheory/GroupAction/MultiplePrimitivity.lean,Mathlib/LinearAlgebra/AffineSpace/AffineSubspace/Defs.lean,Mathlib/LinearAlgebra/Multilinear/Basic.lean,Mathlib/LinearAlgebra/RootSystem/Base.lean,Mathlib/MeasureTheory/Constructions/BorelSpace/Order.lean,Mathlib/MeasureTheory/Constructions/Cylinders.lean,Mathlib/MeasureTheory/Constructions/Polish/Basic.lean,Mathlib/MeasureTheory/Covering/Vitali.lean,Mathlib/MeasureTheory/Function/SimpleFunc.lean,Mathlib/MeasureTheory/Measure/Restrict.lean,Mathlib/MeasureTheory/Measure/Typeclasses/Finite.lean,Mathlib/MeasureTheory/SetAlgebra.lean,Mathlib/NumberTheory/AbelSummation.lean,Mathlib/NumberTheory/Divisors.lean,Mathlib/NumberTheory/ModularForms/DedekindEta.lean,Mathlib/Order/CompactlyGenerated/Basic.lean,Mathlib/Order/CompleteLatticeIntervals.lean,Mathlib/Order/Interval/Finset/Defs.lean,Mathlib/Order/Interval/Set/Defs.lean,Mathlib/Order/LiminfLimsup.lean,Mathlib/Order/PartialSups.lean,Mathlib/Order/SetNotation.lean,Mathlib/Order/UpperLower/Basic.lean,Mathlib/Probability/Moments/ComplexMGF.lean,Mathlib/Probability/ProductMeasure.lean,Mathlib/RingTheory/HahnSeries/Summable.lean,Mathlib/RingTheory/Nilpotent/Defs.lean,Mathlib/Topology/Algebra/ProperAction/ProperlyDiscontinuous.lean,Mathlib/Topology/Bornology/BoundedOperation.lean,Mathlib/Topology/Bornology/Constructions.lean,Mathlib/Topology/Compactness/Compact.lean,Mathlib/Topology/Compactness/Lindelof.lean,Mathlib/Topology/Connected/Clopen.lean,Mathlib/Topology/ContinuousMap/BoundedCompactlySupported.lean,Mathlib/Topology/EMetricSpace/BoundedVariation.lean,Mathlib/Topology/GDelta/MetrizableSpace.lean,Mathlib/Topology/JacobsonSpace.lean,Mathlib/Topology/Order/Compact.lean,Mathlib/Topology/Order/HullKernel.lean,Mathlib/Topology/Perfect.lean,Mathlib/Topology/Sets/CompactOpenCovered.lean,MathlibTest/push.lean 87 7 ['github-actions', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
111-600
3 months ago
236-72585
236 days ago
0-10831
3 hours
27053 tb65536
author:tb65536
 feat: Galois group of `x^n - x - 1` --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) WIP t-algebra large-import merge-conflict
label:t-algebra$
 270/155 Archive/Wiedijk100Theorems/AbelRuffini.lean,Mathlib/RingTheory/Polynomial/Morse.lean,Mathlib/RingTheory/Polynomial/Selmer.lean 3 8 ['AntoineChambert-Loir', 'github-actions', 'mathlib-merge-conflicts', 'mathlib4-merge-conflict-bot'] nobody
111-579
3 months ago
313-78696
313 days ago
0-1
1 second
29792 robertmaxton42
author:robertmaxton42
 feat(RelCWComplex): a (relative, concrete) CW complex is the colimit of its skeleta Adds: * `RelCWComplex.Subcomplex.isCoherentWith_cover`: a (relative) CW complex is coherent with any collection of subcomplexes that cover. * `RelCWComplex.descBySkeletonLT` and `descBySkeleton`: construct a continuous map from a complex by providing a family of compatible maps from each skeleton and the base. `CWComplex.descBySkeleton` skips the base. - [ ] depends on: #29788 - [ ] depends on: #29790 --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict blocked-by-other-PR large-import t-topology 672/31 Mathlib/Data/Set/Subset.lean,Mathlib/Data/Set/UnionLift.lean,Mathlib/Topology/CWComplex/Classical/Basic.lean,Mathlib/Topology/CWComplex/Classical/Finite.lean,Mathlib/Topology/CWComplex/Classical/Subcomplex.lean,Mathlib/Topology/Category/TopCat/Limits/Products.lean,Mathlib/Topology/Coherent.lean,Mathlib/Topology/Constructions.lean,Mathlib/Topology/Constructions/SumProd.lean,Mathlib/Topology/ContinuousMap/Basic.lean 10 4 ['github-actions', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot', 'scholzhannah'] nobody
111-473
3 months ago
245-76556
245 days ago
0-104
1 minute
24100 eric-wieser
author:eric-wieser
 feat: restore some explicit binders from Lean 3 Part of #24099 --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict awaiting-author tech debt t-topology t-algebra
label:t-algebra$
 39/42 Mathlib/Data/FinEnum.lean,Mathlib/FieldTheory/Galois/Profinite.lean,Mathlib/Topology/Bases.lean,Mathlib/Topology/Compactness/CompactlyGeneratedSpace.lean,Mathlib/Topology/MetricSpace/IsometricSMul.lean,Mathlib/Topology/Metrizable/CompletelyMetrizable.lean,Mathlib/Topology/Metrizable/Uniformity.lean,Mathlib/Topology/Order.lean,Mathlib/Topology/Order/LowerUpperTopology.lean,Mathlib/Topology/UniformSpace/UniformEmbedding.lean 10 3 ['github-actions', 'grunweg', 'leanprover-community-bot-assistant'] nobody
111-377
3 months ago
401-78380
401 days ago
0-954
15 minutes
34633 mitchell-horner
author:mitchell-horner
 feat(Combinatorics/SimpleGraph): define the Zarankiewicz function Defines the Zarankiewicz function $z(m, n; s, t)$ in terms of bipartite graphs. --- - [x] depends on: #34632 This comes from splitting up #25841 into smaller PRs. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-combinatorics maintainer-merge blocked-by-other-PR 247/0 Mathlib.lean,Mathlib/Combinatorics/SimpleGraph/Extremal/Zarankiewicz.lean,Mathlib/Combinatorics/SimpleGraph/Maps.lean 4 30 ['SnirBroshi', 'YaelDillies', 'b-mehta', 'github-actions', 'mathlib-dependent-issues', 'mathlib-merge-conflicts', 'mitchell-horner'] nobody
110-65589
3 months ago
11-79178
11 days ago
57-10700
57 days
29411 llllvvuu
author:llllvvuu
 feat(LinearAlgebra/Matrix/Rank): rank factorization The rank factorization derived from `Module.finBasis`. Co-authored-by: Aristotle Harmonic --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict awaiting-author t-algebra
label:t-algebra$
 20/0 Mathlib/LinearAlgebra/Matrix/Rank.lean,Mathlib/LinearAlgebra/Matrix/ToLin.lean 2 3 ['github-actions', 'jcommelin', 'mathlib4-merge-conflict-bot'] jcommelin
assignee:jcommelin
110-40240
3 months ago
210-29943
210 days ago
46-58011
46 days
30260 imbrem
author:imbrem
 feat(CategoryTheory/Monoidal): added CocartesianMonoidalCategory As discussed in #21603 and #28718; this implements chosen finite coproducts on top of `AddMonoidalCategory` as defined in #30150 --- - [ ] depends on: #30150 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict blocked-by-other-PR large-import new-contributor t-category-theory 839/125 Mathlib.lean,Mathlib/CategoryTheory/Monoidal/Category.lean,Mathlib/CategoryTheory/Monoidal/Cocartesian/Basic.lean,Mathlib/CategoryTheory/Monoidal/Discrete.lean,Mathlib/Tactic/ToAdditive/GuessName.lean 5 4 ['github-actions', 'imbrem', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
110-40227
3 months ago
228-77196
228 days ago
0-1234
20 minutes
30258 imbrem
author:imbrem
 feat(CategoryTheory/Monoidal): to_additive for proofs using `monoidal` Building on #30150, this allows us to use `@[to_additive]` on proofs containing `monoidal`, by tagging the lemmas `monoidal` outputs with `@[to_additive]` as appropriate. Testing on my branch [`additive-monoidal-coherence`](https://github.com/imbrem/mathlib4/tree/additive-monoidal-coherence) shows that this works. It is still future work to have either the `monoidal` tactic or a new `add_monoidal` tactic work for `AddMonoidalCategory` instances directly. --- - [ ] depends on: #30150 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict blocked-by-other-PR large-import new-contributor t-category-theory 524/140 Mathlib/CategoryTheory/Monoidal/Category.lean,Mathlib/CategoryTheory/Monoidal/Discrete.lean,Mathlib/Tactic/CategoryTheory/Monoidal/Normalize.lean,Mathlib/Tactic/CategoryTheory/Monoidal/PureCoherence.lean,Mathlib/Tactic/CategoryTheory/MonoidalComp.lean,Mathlib/Tactic/ToAdditive/GuessName.lean 6 3 ['github-actions', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
110-40220
3 months ago
228-82849
228 days ago
0-241
4 minutes
29790 robertmaxton42
author:robertmaxton42
 feat(IsCoherentWith) : families of maps from a coherent collection of subspaces lift uniquely to maps from the total space * Adds `IsCoherentWith.liftCover`, which lifts a compatible family of continuous maps from each member of a coherent set of subspaces to a single continuous map on the whole space. * Adds `IsCoherentWith.liftCover'`, which does the same but for a set of coherent subspaces given as the range of a function into `Set X` rather than as an explicit `Set (Set X).` - [ ] depends on: #29788 --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) blocked-by-other-PR large-import t-topology 350/3 Mathlib/Data/Set/Subset.lean,Mathlib/Data/Set/UnionLift.lean,Mathlib/Topology/Category/TopCat/Limits/Products.lean,Mathlib/Topology/Coherent.lean,Mathlib/Topology/Constructions.lean,Mathlib/Topology/Constructions/SumProd.lean,Mathlib/Topology/ContinuousMap/Basic.lean 7 3 ['github-actions', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
110-40139
3 months ago
245-77216
245 days ago
0-119
1 minute
30253 luigi-massacci
author:luigi-massacci
 feat(Analysis/Distribution/ContDiffMapSupportedIn): Add a wrapper for iteratedFDeriv on the type of bundled smooth compactly supported maps Add a wrapper for `iteratedFDeriv` and `fderiv` and on `D_K`, specializing the definitions for `D_K^n` for the case `n = \top` . Co-authored by: @ADedecker --- - [x] depends on: #30240 - [x] depends on: #30239 - [x] depends on: #30236 - [x] depends on: #30202 - [x] depends on: #30201 - [x] depends on: #30199 - [x] depends on: #30198 - [x] depends on: #30197 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-analysis blocked-by-other-PR 463/18 Mathlib/Analysis/Distribution/ContDiffMapSupportedIn.lean 1 5 ['github-actions', 'mathlib-dependent-issues', 'mathlib4-merge-conflict-bot'] nobody
110-40122
3 months ago
229-9069
229 days ago
0-599
9 minutes
32742 LTolDe
author:LTolDe
 feat(MeasureTheory/Constructions/Polish/Basic): add class SuslinSpace add new class `SuslinSpace` for a topological space that is an analytic set in itself This will be useful to prove the **Effros Theorem**, see [zulip thread](https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/Effros.20Theorem/with/558712441). --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor awaiting-zulip t-measure-probability awaiting-author 4/0 Mathlib/MeasureTheory/Constructions/Polish/Basic.lean 1 10 ['ADedecker', 'LTolDe', 'dagurtomas', 'dupuisf', 'github-actions', 'jcommelin'] PatrickMassot
assignee:PatrickMassot
110-39994
3 months ago
136-24126
136 days ago
25-76907
25 days
33470 erdOne
author:erdOne
 feat: generalize `Polynomial.freeMonic` --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) awaiting-author t-algebra merge-conflict
label:t-algebra$
 80/52 Mathlib.lean,Mathlib/Algebra/Polynomial/FreeMonic.lean,Mathlib/RingTheory/Polynomial/UniversalFactorizationRing.lean 3 3 ['Ruben-VandeVelde', 'github-actions', 'mathlib-merge-conflicts'] nobody
110-39869
3 months ago
120-3535
120 days ago
20-81395
20 days
30920 callesonne
author:callesonne
 feat(Category/Grpd): define the bicategory of groupoids This is a migration of #25561 to a fork. --- - [x] depends on: #30132 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-category-theory large-import merge-conflict 133/46 Mathlib/CategoryTheory/Bicategory/InducedBicategory.lean,Mathlib/CategoryTheory/Category/Grpd.lean,Mathlib/CategoryTheory/ConcreteCategory/Bundled.lean 3 6 ['Jlh18', 'github-actions', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
110-32059
3 months ago
208-47743
208 days ago
0-117
1 minute
30121 idontgetoutmuch
author:idontgetoutmuch
 feat(Mathlib/Geometry/Manifold): principal fiber bundle core A structure capturing what it means to be a principal fibre bundle. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) awaiting-author t-differential-geometry new-contributor 227/0 Mathlib.lean,Mathlib/Geometry/Manifold/PrincipalFiberBundle/PrincipalGBundle.lean 2 8 ['github-actions', 'grunweg', 'idontgetoutmuch', 'mathlib4-merge-conflict-bot'] hrmacbeth
assignee:hrmacbeth
110-31935
3 months ago
207-23381
207 days ago
25-16284
25 days
27918 kim-em
author:kim-em
 chore: refactor WithBot/WithTop as structures For now we are still relying on `WithBot` and `WithTop` being defeq, but there is no impossible obstacle to converting them *both* to the same structure. This PR begins this effort; the modified files are all compiling, but there are more files that still have problems. Help on this (either ask to push to my branch, PR to my branch, or just adopt the whole thing!) very much appreciated. file-removed merge-conflict WIP 971/361 Mathlib/Algebra/Order/GroupWithZero/Canonical.lean,Mathlib/Algebra/Order/Interval/Basic.lean,Mathlib/Algebra/Order/Monoid/ToMulBot.lean,Mathlib/Algebra/Order/Monoid/Unbundled/WithTop.lean,Mathlib/Algebra/Order/Monoid/WithTop.lean,Mathlib/Algebra/Order/Ring/WithTop.lean,Mathlib/Algebra/Polynomial/Degree/Definitions.lean,Mathlib/Algebra/Polynomial/Degree/Operations.lean,Mathlib/Analysis/BoxIntegral/Box/Basic.lean,Mathlib/Analysis/BoxIntegral/Partition/Additive.lean,Mathlib/Analysis/BoxIntegral/Partition/Basic.lean,Mathlib/Analysis/BoxIntegral/Partition/Split.lean,Mathlib/Analysis/BoxIntegral/Partition/SubboxInduction.lean,Mathlib/Analysis/Meromorphic/Order.lean,Mathlib/Analysis/SpecialFunctions/Pow/NNReal.lean,Mathlib/Data/Countable/Basic.lean,Mathlib/Data/ENNReal/Basic.lean,Mathlib/Data/ENNReal/Operations.lean,Mathlib/Data/ENat/Defs.lean,Mathlib/Data/EReal/Operations.lean,Mathlib/Data/Finset/WithBot.lean,Mathlib/Data/Fintype/WithTopBot.lean,Mathlib/Data/List/MinMax.lean,Mathlib/Data/Nat/PartENat.lean,Mathlib/Data/Ordmap/Invariants.lean,Mathlib/Data/Ordmap/Ordset.lean,Mathlib/Data/Sum/Order.lean,Mathlib/Geometry/Manifold/PartitionOfUnity.lean,Mathlib/GroupTheory/ArchimedeanDensely.lean,Mathlib/Logic/Embedding/WithBot.lean,Mathlib/Logic/Equiv/WithBot.lean,Mathlib/MeasureTheory/Constructions/BorelSpace/Real.lean,Mathlib/MeasureTheory/Group/Measure.lean,Mathlib/MeasureTheory/MeasurableSpace/Constructions.lean,Mathlib/Order/Category/BddLat.lean,Mathlib/Order/ConditionallyCompleteLattice/Basic.lean,Mathlib/Order/GaloisConnection/Basic.lean,Mathlib/Order/Hom/WithTopBot.lean,Mathlib/Order/Interval/Basic.lean,Mathlib/Order/Interval/Finset/Defs.lean,Mathlib/Order/Interval/Set/WithBotTop.lean,Mathlib/Order/KrullDimension.lean,Mathlib/Order/Set.lean,Mathlib/Order/SuccPred/Basic.lean,Mathlib/Order/TypeTags.lean,Mathlib/Order/WithBot/Basic.lean,Mathlib/Order/WithBot/BooleanAlgebra.lean,Mathlib/Order/WithBot/NAry.lean,Mathlib/RingTheory/OrderOfVanishing.lean,Mathlib/RingTheory/UniqueFactorizationDomain/FactorSet.lean,Mathlib/SetTheory/Cardinal/ENat.lean,Mathlib/Topology/Algebra/Ring/Real.lean,Mathlib/Topology/Category/LightProfinite/Sequence.lean,Mathlib/Topology/Compactification/OnePoint/Basic.lean,Mathlib/Topology/Instances/ENat.lean,MathlibTest/lift.lean 56 18 ['eric-wieser', 'github-actions', 'kim-em', 'mathlib4-merge-conflict-bot'] nobody
110-31696
3 months ago
229-11739
229 days ago
18-9929
18 days
29605 alreadydone
author:alreadydone
 experiment(Algebra): unbundle npow/zpow from Monoid/InvDivMonoid --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-algebra awaiting-CI WIP
label:t-algebra$
 1527/1020 Mathlib/Algebra/AddTorsor/Defs.lean,Mathlib/Algebra/BigOperators/Finsupp/Basic.lean,Mathlib/Algebra/BigOperators/Group/Finset/Basic.lean,Mathlib/Algebra/BigOperators/Group/Finset/Defs.lean,Mathlib/Algebra/BigOperators/Group/Finset/Lemmas.lean,Mathlib/Algebra/BigOperators/Group/Finset/Piecewise.lean,Mathlib/Algebra/BigOperators/Group/List/Basic.lean,Mathlib/Algebra/BigOperators/Group/List/Defs.lean,Mathlib/Algebra/BigOperators/Group/List/Lemmas.lean,Mathlib/Algebra/BigOperators/Group/Multiset/Basic.lean,Mathlib/Algebra/BigOperators/Group/Multiset/Defs.lean,Mathlib/Algebra/BigOperators/Pi.lean,Mathlib/Algebra/BigOperators/Ring/Finset.lean,Mathlib/Algebra/BigOperators/Ring/List.lean,Mathlib/Algebra/BigOperators/Ring/Multiset.lean,Mathlib/Algebra/Category/MonCat/ForgetCorepresentable.lean,Mathlib/Algebra/Divisibility/Basic.lean,Mathlib/Algebra/Divisibility/Units.lean,Mathlib/Algebra/Field/Basic.lean,Mathlib/Algebra/Field/Power.lean,Mathlib/Algebra/Field/Rat.lean,Mathlib/Algebra/Group/Action/Basic.lean,Mathlib/Algebra/Group/Action/Defs.lean,Mathlib/Algebra/Group/Basic.lean,Mathlib/Algebra/Group/Commute/Basic.lean,Mathlib/Algebra/Group/Commute/Defs.lean,Mathlib/Algebra/Group/Commute/Units.lean,Mathlib/Algebra/Group/Conj.lean,Mathlib/Algebra/Group/Defs.lean,Mathlib/Algebra/Group/End.lean,Mathlib/Algebra/Group/Even.lean,Mathlib/Algebra/Group/Ext.lean,Mathlib/Algebra/Group/Fin/Basic.lean,Mathlib/Algebra/Group/Finsupp.lean,Mathlib/Algebra/Group/Hom/Basic.lean,Mathlib/Algebra/Group/Hom/Defs.lean,Mathlib/Algebra/Group/Hom/End.lean,Mathlib/Algebra/Group/Hom/Instances.lean,Mathlib/Algebra/Group/Idempotent.lean,Mathlib/Algebra/Group/InjSurj.lean,Mathlib/Algebra/Group/Int/Defs.lean,Mathlib/Algebra/Group/Invertible/Basic.lean,Mathlib/Algebra/Group/Irreducible/Lemmas.lean,Mathlib/Algebra/Group/Nat/Defs.lean,Mathlib/Algebra/Group/Nat/Hom.lean,Mathlib/Algebra/Group/NatPowAssoc.lean,Mathlib/Algebra/Group/Opposite.lean,Mathlib/Algebra/Group/PUnit.lean,Mathlib/Algebra/Group/Pi/Basic.lean,Mathlib/Algebra/Group/Pi/Lemmas.lean,Mathlib/Algebra/Group/Pointwise/Finset/Basic.lean,Mathlib/Algebra/Group/Pointwise/Set/Basic.lean,Mathlib/Algebra/Group/Prod.lean,Mathlib/Algebra/Group/Semiconj/Basic.lean,Mathlib/Algebra/Group/Semiconj/Defs.lean,Mathlib/Algebra/Group/Semiconj/Units.lean,Mathlib/Algebra/Group/Subgroup/Defs.lean,Mathlib/Algebra/Group/Subgroup/Lattice.lean,Mathlib/Algebra/Group/Subgroup/ZPowers/Basic.lean,Mathlib/Algebra/Group/Submonoid/BigOperators.lean,Mathlib/Algebra/Group/Submonoid/Defs.lean,Mathlib/Algebra/Group/Submonoid/Membership.lean,Mathlib/Algebra/Group/Support.lean,Mathlib/Algebra/Group/Torsion.lean,Mathlib/Algebra/Group/TransferInstance.lean,Mathlib/Algebra/Group/TypeTags/Basic.lean,Mathlib/Algebra/Group/ULift.lean,Mathlib/Algebra/Group/Units/Defs.lean,Mathlib/Algebra/Group/Units/Hom.lean,Mathlib/Algebra/GroupWithZero/Action/Defs.lean,Mathlib/Algebra/GroupWithZero/Basic.lean,Mathlib/Algebra/GroupWithZero/Commute.lean,Mathlib/Algebra/GroupWithZero/Conj.lean,Mathlib/Algebra/GroupWithZero/Defs.lean,Mathlib/Algebra/GroupWithZero/Divisibility.lean,Mathlib/Algebra/GroupWithZero/Hom.lean,Mathlib/Algebra/GroupWithZero/Indicator.lean,Mathlib/Algebra/GroupWithZero/InjSurj.lean,Mathlib/Algebra/GroupWithZero/Semiconj.lean,Mathlib/Algebra/GroupWithZero/ULift.lean,Mathlib/Algebra/GroupWithZero/Units/Basic.lean,Mathlib/Algebra/GroupWithZero/Units/Lemmas.lean,Mathlib/Algebra/GroupWithZero/WithZero.lean,Mathlib/Algebra/Module/NatInt.lean,Mathlib/Algebra/NoZeroSMulDivisors/Defs.lean,Mathlib/Algebra/Order/AddGroupWithTop.lean,Mathlib/Algebra/Order/BigOperators/Group/List.lean,Mathlib/Algebra/Order/BigOperators/Group/Multiset.lean,Mathlib/Algebra/Order/BigOperators/GroupWithZero/List.lean,Mathlib/Algebra/Order/BigOperators/GroupWithZero/Multiset.lean,Mathlib/Algebra/Order/Group/Abs.lean,Mathlib/Algebra/Order/Group/Action.lean,Mathlib/Algebra/Order/Group/Basic.lean,Mathlib/Algebra/Order/Group/DenselyOrdered.lean,Mathlib/Algebra/Order/Group/Finset.lean,Mathlib/Algebra/Order/Group/Lattice.lean,Mathlib/Algebra/Order/Group/Multiset.lean,Mathlib/Algebra/Order/Group/PosPart.lean,Mathlib/Algebra/Order/Group/Synonym.lean,Mathlib/Algebra/Order/Group/Unbundled/Abs.lean 162 2 ['github-actions', 'mathlib4-merge-conflict-bot'] nobody
110-31545
3 months ago
252-8702
252 days ago
0-2
2 seconds
25474 adomani
author:adomani
 test for .lean/.md check A test PR for #25473. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-linter file-removed WIP 10/1 .github/workflows/lint_and_suggest_pr.yml,Mathlib.lean,Mathlib/NumberTheory/NumberField/CMField.Lean 3 2 ['github-actions', 'leanprover-community-bot-assistant'] nobody
110-31528
3 months ago
351-43574
351 days ago
0-907
15 minutes
33991 grunweg
author:grunweg
 test: pretty-printing of class abbrev Lake build fails with an error in batteries: what am I doing wrong? --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict file-removed large-import WIP 118/303 .github/workflows/daily.yml,Mathlib.lean,Mathlib/Algebra/Group/Action/TransferInstance.lean,Mathlib/Algebra/Group/TypeTags/Basic.lean,Mathlib/Algebra/Notation/Defs.lean,Mathlib/Algebra/Notation/Lemmas.lean,Mathlib/Algebra/Notation/Pi/Defs.lean,Mathlib/Algebra/Notation/Prod.lean,Mathlib/Algebra/Order/Group/Defs.lean,Mathlib/Algebra/Order/Group/Unbundled/Basic.lean,Mathlib/CategoryTheory/Limits/Yoneda.lean,Mathlib/Data/Finite/Defs.lean,Mathlib/Data/Int/Cast/Pi.lean,Mathlib/Data/Int/Init.lean,Mathlib/Data/List/Flatten.lean,Mathlib/Data/List/GetD.lean,Mathlib/Data/List/Indexes.lean,Mathlib/Data/Multiset/Defs.lean,Mathlib/Data/Nat/Basic.lean,Mathlib/Data/Nat/Bits.lean,Mathlib/Data/Nat/Init.lean,Mathlib/GroupTheory/GroupAction/SubMulAction/OfFixingSubgroup.lean,Mathlib/Lean/Meta/Simp.lean,Mathlib/Order/BoundedOrder/Basic.lean,Mathlib/Order/GaloisConnection/Defs.lean,Mathlib/Order/Monotone/Defs.lean,Mathlib/RingTheory/Valuation/Discrete/Basic.lean,Mathlib/SetTheory/Cardinal/Defs.lean,Mathlib/Tactic/Common.lean,Mathlib/Tactic/FunProp/Decl.lean,Mathlib/Tactic/Linter/DirectoryDependency.lean,Mathlib/Tactic/NormNum/Core.lean,Mathlib/Tactic/Positivity/Core.lean,Mathlib/Tactic/Push/Attr.lean,Mathlib/Tactic/Widget/LibraryRewrite.lean,Mathlib/Topology/Defs/Basic.lean,Mathlib/Util/AssertExists.lean,MathlibTest/AssertExists.lean,MathlibTest/CalcQuestionMark.lean,MathlibTest/DeprecatedSyntaxLinter.lean,MathlibTest/DirectoryDependencyLinter/Test.lean,MathlibTest/EmptyLine.lean,MathlibTest/ExtractGoal.lean,MathlibTest/HaveLetLinter.lean,MathlibTest/LibrarySearch/IsCompact.lean,MathlibTest/LintStyle.lean,MathlibTest/TacticAnalysis.lean,MathlibTest/UnusedInstancesInType.lean,MathlibTest/Util/PrintSorries.lean,MathlibTest/WhitespaceLinter.lean,MathlibTest/aesop_cat.lean,MathlibTest/eqns.lean,MathlibTest/fast_instance.lean,MathlibTest/globalAttributeIn.lean,MathlibTest/hintAll.lean,MathlibTest/jacobiSym.lean,MathlibTest/slim_check.lean,MathlibTest/toAdditive.lean,lake-manifest.json,lakefile.lean,lean-toolchain 61 2 ['github-actions', 'mathlib4-merge-conflict-bot'] nobody
110-31471
3 months ago
127-46156
127 days ago
0-111
1 minute
31110 bryangingechen
author:bryangingechen
 ci: don't delete merged branches This will only affect PRs that are not from forks (e.g. this one). The motivation is that #30913 was closed automatically due to its target branch deleted after #30912 was merged. See also [#PR reviews > #30913 feat(Computability/Language):add subtraction notation @ 💬](https://leanprover.zulipchat.com/#narrow/channel/144837-PR-reviews/topic/.2330913.20feat.28Computability.2FLanguage.29.3Aadd.20subtraction.20notation/near/548052556). Looking at the history, it looks like this option hasn't been changed since we added bors to mathlib3: https://github.com/leanprover-community/mathlib3/pull/2322 --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) awaiting-author CI merge-conflict 1/1 bors.toml 1 5 ['bryangingechen', 'eric-wieser', 'github-actions', 'mathlib4-merge-conflict-bot', 'urkud'] nobody
110-31215
3 months ago
203-13230
203 days ago
0-64677
17 hours
33707 jcommelin
author:jcommelin
 ci: add commit verification for transient and automated commits This PR adds a CI workflow that verifies PRs correctly use transient and automated commits, and provides reviewers with a clear summary of which commits need human review. Commit types: - **Substantive commits**: Regular commits requiring human review - **Automated commits** (`x: `): CI verifies the commit is the exact result of running the command on the parent - **Transient commits** (`transient: ...`): CI verifies these have zero net effect on the final tree What this PR adds: - `scripts/verify_commits.sh` - Main verification script - `scripts/verify_commits_summary.sh` - Generates PR comment from JSON output - `.github/workflows/commit_verification.yml` - GitHub Actions workflow --- ### Testing locally The commit at `HEAD^` contains test branch creation scripts. These can be used for testing the functionality of the two shell scripts. To test: ```bash # Checkout the commit with test scripts git checkout HEAD^ # Create a test branch based on your current branch (before checkout) # Save your branch name first: BASE_BRANCH=$(git rev-parse --abbrev-ref HEAD) git checkout HEAD^ ./scripts/create_test_branch.sh $BASE_BRANCH # Run verification (should pass) ./scripts/verify_commits.sh $BASE_BRANCH ./scripts/verify_commits.sh $BASE_BRANCH --json | ./scripts/verify_commits_summary.sh repo_foo 12345 # Clean up and return git checkout $BASE_BRANCH && git branch -D ci-x-test-* ``` Available test scripts: - `create_test_branch.sh` - Creates a branch with valid transient + auto commits (should pass) - `create_test_branch_fail_conflict.sh` - Transient commits cause cherry-pick conflicts (should fail) - `create_test_branch_fail_transient.sh` - Transient commits have net effect (should fail) - `create_test_branch_fail_auto.sh` - Auto commit doesn't match command output (should fail) 🤖 Generated with [Claude Code](https://claude.com/claude-code) CI merge-conflict LLM-generated 685/0 .github/workflows/commit_verification.yml,scripts/verify_commits.sh,scripts/verify_commits_summary.sh 3 2 ['github-actions', 'mathlib4-merge-conflict-bot'] nobody
110-31210
3 months ago
134-72296
134 days ago
0-56518
15 hours
31102 JOSHCLUNE
author:JOSHCLUNE
 feat: require LeanHammer Experimenting with adding LeanHammer as a mathlib dependency --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict new-contributor t-meta 61/4 Mathlib/Tactic/Common.lean,Mathlib/Tactic/Linter/DirectoryDependency.lean,MathlibTest/Hammer.lean,lake-manifest.json,lakefile.lean 5 2 ['github-actions', 'mathlib4-merge-conflict-bot'] nobody
110-30702
3 months ago
204-2841
204 days ago
0-6852
1 hour
33431 gululu996-ui
author:gululu996-ui
 feat(Combinatorics/SimpleGraph/Bipartite): characterize bipartite simple graphs by even cycles Add the classical characterization of bipartite simple graphs: a simple graph is bipartite if and only if every cycle has even length. Previously, mathlib has the definition of `IsBipartite` for `SimpleGraph` and various lemmas about bipartite graphs, but it does not provide this equivalence in a single theorem, so users have to reprove or reassemble it from existing results. Prove the forward direction by showing a 2-coloring alternates along any walk, so every cycle must have even length. Prove the converse by showing that if an odd cycle exists then no bipartition is possible, hence if all cycles are even the graph admits a bipartition. new-contributor t-combinatorics awaiting-author merge-conflict 186/1 Mathlib/Combinatorics/SimpleGraph/Bipartite.lean 1 6 ['NickAdfor', 'github-actions', 'jcommelin', 'mathlib-merge-conflicts'] kmill
assignee:kmill
110-30434
3 months ago
112-31331
112 days ago
26-3983
26 days
34007 martinwintermath
author:martinwintermath
 feat(Algebra/Module/Submodule/Dual): dual operator for submodules Add new file `Dual.lean` that defines the dual operator for submodules. The main definition is * `Submodule.dual`: given a bilinear pairing `p` between two modules `M₁` and `M₂` and a submodule `S` in `M₁`, `Submodule.dual p S` is the submodule in `M₂` consisting of all points `y` such that `0 = p x y` for all `x ∈ S`. For reasons of generality, `p` is actually a general sesqui-bilinear map, that is, of the form `p : M₁ →ₛₗ[I₁] M₂ →ₛₗ[I₂] M`. This implementation of the `dual` operator for submodules is written to parallel the implementation of `PointedCone.dual`. Include some additional results: * theorems that represent the dual as the kernel of a linear map * theorems for the relation between dual and the `dualAnnihilator` and `dualCoannihilator` of a submodule. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra new-contributor awaiting-author
label:t-algebra$
 236/0 Mathlib.lean,Mathlib/Algebra/Module/Submodule/Dual.lean 2 7 ['github-actions', 'joelriou', 'martinwintermath', 'mathlib-bors'] joelriou
assignee:joelriou
110-26471
3 months ago
112-8930
112 days ago
14-81283
14 days
34473 JovanGerb
author:JovanGerb
 feat: remove `Membership` instance for `SetLike` This PR is an attempt to change the underlying expression of `x ∈ s` when `s` is not a `Set α`, but a `SetLike`, such as `Finset α` or `Subgroup α`. Instead of having a `Membership` instance, we use the membership instance on `Set α`, combined with the coercion to `Set α`. This has various benefits - There is now only one form instead of two to say the same thing. This saves us a lot of rewrites that will now become syntactic equalities. - It is not needed anymore to create a `mem_` lemma for every single `coe_` lemma in order to maintain simp confluence Unfortunately, doing this refactor is going to be a very big task, simply because so many proofs break as a result of `simp` now trying to simplify away the coercion where there was no coercion before. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-set-theory merge-conflict 136/96 Mathlib/Algebra/Algebra/Subalgebra/Basic.lean,Mathlib/Algebra/Algebra/Subalgebra/Lattice.lean,Mathlib/Algebra/BigOperators/Ring/Finset.lean,Mathlib/Algebra/Group/Pointwise/Set/BigOperators.lean,Mathlib/Algebra/Group/Subgroup/Pointwise.lean,Mathlib/Algebra/Group/Submonoid/Membership.lean,Mathlib/Algebra/Group/Submonoid/Operations.lean,Mathlib/Algebra/Group/Subsemigroup/Defs.lean,Mathlib/Algebra/Module/Submodule/Lattice.lean,Mathlib/Algebra/Module/Submodule/Map.lean,Mathlib/Algebra/Module/Submodule/Pointwise.lean,Mathlib/Algebra/Order/BigOperators/Group/Finset.lean,Mathlib/Algebra/Ring/Subsemiring/Basic.lean,Mathlib/Data/Finset/Card.lean,Mathlib/Data/Finset/Defs.lean,Mathlib/Data/Finset/Erase.lean,Mathlib/Data/Finset/Image.lean,Mathlib/Data/Finset/Insert.lean,Mathlib/Data/Finset/Max.lean,Mathlib/Data/Finset/NAry.lean,Mathlib/Data/Finset/NoncommProd.lean,Mathlib/Data/Finset/Powerset.lean,Mathlib/Data/Finset/Preimage.lean,Mathlib/Data/Finset/Prod.lean,Mathlib/Data/Finset/Sigma.lean,Mathlib/Data/Finset/Union.lean,Mathlib/Data/Finsupp/Basic.lean,Mathlib/Data/Fintype/EquivFin.lean,Mathlib/Data/Set/Finite/Basic.lean,Mathlib/Data/SetLike/Basic.lean,Mathlib/LinearAlgebra/Span/Basic.lean,Mathlib/LinearAlgebra/Span/Defs.lean,Mathlib/Logic/Embedding/Basic.lean,Mathlib/Order/Closure.lean,Mathlib/Order/CompleteLattice/Basic.lean,Mathlib/Order/CompleteLattice/Finset.lean,Mathlib/Order/ConditionallyCompleteLattice/Finset.lean,Mathlib/Order/Interval/Finset/Basic.lean,Mathlib/Order/Interval/Finset/Defs.lean,MathlibTest/set_like.lean 40 3 ['github-actions', 'mathlib4-merge-conflict-bot'] nobody
110-2013
3 months ago
115-70198
115 days ago
0-8221
2 hours
34271 gasparattila
author:gasparattila
 feat(Topology/Sets): second-countability of `(Nonempty)Compacts` --- - [x] depends on: #34266 - [x] depends on: #34268 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-topology blocked-by-other-PR 308/93 Mathlib/Topology/MetricSpace/Closeds.lean,Mathlib/Topology/Sets/VietorisTopology.lean 5 9 ['github-actions', 'mathlib-dependent-issues', 'mathlib-merge-conflicts', 'mathlib4-merge-conflict-bot', 'scholzhannah'] urkud
assignee:urkud
110-727
3 months ago
14-5554
14 days ago
51-14168
51 days
34171 SnirBroshi
author:SnirBroshi
 feat(Combinatorics/SimpleGraph/Hasse): Define the Eulerian path of a path graph --- Such statements are left for a future PR, since they add imports so we probably want to split them into a separate file: ```lean theorem IsEulerian.ofPathGraph : ofPathGraph n |>.IsEulerian := by sorry theorem IsHamiltonian.ofPathGraph : ofPathGraph n |>.IsHamiltonian := by sorry ``` [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-combinatorics awaiting-author 37/1 Mathlib/Combinatorics/SimpleGraph/Hasse.lean 1 13 ['SnirBroshi', 'YaelDillies', 'github-actions', 'vihdzp', 'vlad902'] YaelDillies
assignee:YaelDillies
109-57134
3 months ago
58-26914
58 days ago
63-65372
63 days
34716 CoolRmal
author:CoolRmal
 feat: a right continuous strongly adapted process is progressively measurable --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) WIP brownian t-measure-probability merge-conflict 164/0 Mathlib/Probability/Process/Adapted.lean 1 3 ['CoolRmal', 'github-actions', 'mathlib-merge-conflicts'] nobody
109-45189
3 months ago
109-45238
109 days ago
0-23
23 seconds
31008 RemyDegenne
author:RemyDegenne
 refactor: generalize the index of the process in the Doob decomposition Generalize the index set for the Doob decomposition of an adapted process from Nat to a type with `LinearOrder`, `LocallyFiniteOrder`, `OrderBot`, `SuccOrder` (there is an order iso from that type to an interval of Nat). Motivation: to prove the Doob-Meyer decomposition we want to take a process indexed by [0,1] and consider sub-processes indexed by the dyadic points k*2^{-n} for a fixed n. We could use a process indexed by Nat, but we would have to invent values for k > 2^n while respecting the other properties of the process, and being able to index by the dyadics directly seems easier. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) WIP t-measure-probability merge-conflict 341/192 Mathlib/Order/SuccPred/LinearLocallyFinite.lean,Mathlib/Probability/Martingale/Basic.lean,Mathlib/Probability/Martingale/BorelCantelli.lean,Mathlib/Probability/Martingale/Centering.lean,Mathlib/Probability/Martingale/OptionalStopping.lean,Mathlib/Probability/Martingale/Upcrossing.lean,Mathlib/Probability/Process/Adapted.lean 7 3 ['github-actions', 'mathlib-merge-conflicts', 'mathlib4-merge-conflict-bot'] nobody
109-43742
3 months ago
206-29059
206 days ago
0-2
2 seconds
30122 xroblot
author:xroblot
 Development branch (1) Stickelberger --- WIP large-import merge-conflict 4748/32 Mathlib.GaloisTower.lean,Mathlib/AddCharTrace.lean,Mathlib/Algebra/Group/Subgroup/Basic.lean,Mathlib/Algebra/Group/Subgroup/Map.lean,Mathlib/Cyclotomic.lean,Mathlib/Data/Nat/Digits/Lemmas.lean,Mathlib/Duality.lean,Mathlib/FieldTheory/Finite/Extension.lean,Mathlib/FieldTheory/PrimeField.lean,Mathlib/GalCyclotomic.lean,Mathlib/GaussSum.lean,Mathlib/GroupTheory/FiniteAbelian/Duality.lean,Mathlib/KroneckerWeber_Blueprint.lean,Mathlib/Logic/Equiv/Set.lean,Mathlib/MWE.lean,Mathlib/Misc.lean,Mathlib/NumberTheory/MulChar/Basic.lean,Mathlib/NumberTheory/NumberField/Basic.lean,Mathlib/NumberTheory/NumberField/Cyclotomic/Basic.lean,Mathlib/NumberTheory/NumberField/Cyclotomic/Galois.lean,Mathlib/NumberTheory/NumberField/Ideal/Basic.lean,Mathlib/NumberTheory/NumberField/Ideal/KummerDedekind.lean,Mathlib/RingTheory/FiniteType.lean,Mathlib/RingTheory/Finiteness/Basic.lean,Mathlib/RingTheory/Ideal/Int.lean,Mathlib/RingTheory/Ideal/Over.lean,Mathlib/RingTheory/Ideal/Pointwise.lean,Mathlib/RingTheory/Invariant/Basic.lean,Mathlib/Sandbox.lean,Mathlib/StickElt.lean,Mathlib/Teichmuller.lean 35 13 ['github-actions', 'mathlib-merge-conflicts', 'mathlib4-merge-conflict-bot'] nobody
109-19491
3 months ago
232-40079
232 days ago
0-12
12 seconds
30620 plp127
author:plp127
 feat: copy LE and LT on preorder and partial order Adds `Preorder.copy` and `PartialOrder.copy` for replacing the le and lt with provably equal ones. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-order awaiting-author 22/0 Mathlib/Order/Defs/PartialOrder.lean 1 7 ['Vierkantor', 'github-actions', 'mathlib4-merge-conflict-bot', 'plp127'] Vierkantor
assignee:Vierkantor
108-8972
3 months ago
178-40312
178 days ago
31-54617
31 days
34000 grunweg
author:grunweg
 chore: golf using fun_prop [foo] syntax --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) WIP merge-conflict 14/8 Mathlib/Analysis/Calculus/ContDiff/Basic.lean,Mathlib/Analysis/SpecialFunctions/BinaryEntropy.lean,Mathlib/Analysis/SpecialFunctions/Exp.lean,Mathlib/Data/Real/Sqrt.lean,Mathlib/InformationTheory/KullbackLeibler/KLFun.lean,MathlibTest/fun_prop_dev.lean 6 6 ['Vierkantor', 'github-actions', 'grunweg', 'mathlib-merge-conflicts'] nobody
108-8963
3 months ago
127-32647
127 days ago
0-1
1 second
34291 YellPika
author:YellPika
 feat(Data): a monad for partial computations This is the code corresponding to [mathlib4 > A monad for partial computations](https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/A.20monad.20for.20partial.20computations/with/569619800). Not currently intended to be merged. This PR depends on #33941. The only changes relevant to this discussion are in `OmegaPart.lean`, `OmegaProp.lean`, and `Quot.lean`. # Original Message Inspired by @**Aaron Liu**'s comments in #**mathlib4>deprecate Mathlib.Data.Nat.PartENat?@538009243** and #**Is there code for X?>Divergence monad@538020049** I made an attempt at constructing a monad for partial computations with a computable `OmegaCompletePartialOrder` instance (neither `Option` nor `Part` support this use case). My solution consists of three parts. **A computable version of `Quotient.choice`.** As mentioned in #**lean4>Quot.lift for dependent products@467436416** , the "obvious" computational interpretation of `Quotient.choice : (∀i:I, @Quotient (A i) …) → @Quotient (∀i:I, A i)` is not sound. However, we _can_ provide a sound computational interpretation when we restrict `I` to `ℕ`: ```lean unsafe def Quotient.countableChoice_impl {α : Nat → Type*} {S : ∀ i, Setoid (α i)} (f : ∀ i, Quotient (S i)) : @Quotient (∀ i, α i) (by infer_instance) := Quotient.lift₂ (fun z s ↦ ⟦fun | .zero => z | .succ n => s n⟧) (fun z₁ s₁ z₂ s₂ h₁ h₂ ↦ by apply sound rintro ⟨_|n⟩ · apply h₁ · apply h₂) (f 0) (countableChoice_impl (fun n ↦ f n.succ)) @[implemented_by Quotient.countableChoice_impl] def Quotient.countableChoice {α : Nat → Type*} {S : ∀ i, Setoid (α i)} (f : ∀ i, Quotient (S i)) : @Quotient (∀ i, α i) (by infer_instance) := Quotient.choice f ``` My justification for the soundness of this implementation comes from the fact that only uses existing (sound and computable) functions + general recursion. The implementation is found [here](https://github.com/YellPika/mathlib4/blob/99d38f164a97c7aa225283ef6016f0279419a994/Mathlib/Data/Quot.lean#L430) (it uses `unquot` instead of recursion for performance reasons, but should be equivalent). **A type of semi-computable propositions.** Next, I define a type of semi-computable propositions `ΩProp` as a quotient of the type of boolean sequences `(ℕ → Bool) / ≈`, where `p ≈ q ≝ (∃n, p n) ↔ (∃n, q n)`. A sequence is interpreted as "true" if at least one element in the sequence is `true`, and the quotient relation ensures that we cannot observe the difference between different "true" sequences. The `ΩProp` type has a (computable) `OmegaCompletePartialOrder`, and `Quotient.countableChoice` is used in the implementation of `ωSup`. The implementation of this type is [here](https://github.com/YellPika/mathlib4/blob/quot-choice-compute/Mathlib/Data/OmegaProp.lean). **A type of semi-computable computations.** Finally, I define the type `ΩPart A` of semi-computable computations returning a value of type `A`. The definition of `ΩPart` is the same as `Part` with `ΩProp` swapped for `Prop`. Again, `ΩPart A` has a (computable) `OmegaCompletePartialOrder` instance. The implementation can be found [here](https://github.com/YellPika/mathlib4/blob/quot-choice-compute/Mathlib/Data/OmegaPart.lean). This was mainly just a fun experiment and the code is not ready to be (or perhaps should not be) put in mathlib. I thought I should post it here to see if 1) there is any interest or 2) an implementation already exists that has escaped my notice. new-contributor large-import merge-conflict 1157/40 Mathlib/Data/OmegaPart.lean,Mathlib/Data/OmegaProp.lean,Mathlib/Data/Quot.lean,Mathlib/Order/OmegaCompletePartialOrder.lean,Mathlib/Order/ScottContinuity.lean 5 2 ['github-actions', 'mathlib-merge-conflicts'] nobody
108-8955
3 months ago
unknown
0-0
0 seconds
34202 or4nge19
author:or4nge19
 feat(Topology/MetricSpace): annuli in (pseudo)(e)metric spaces From the Carleson project. Co-authored-by: James Sundstrom --- - [x] depends on: #34200 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) carleson t-topology awaiting-author 288/0 Mathlib.lean,Mathlib/Topology/MetricSpace/Annulus.lean 2 23 ['MichaelStollBayreuth', 'github-actions', 'grunweg', 'j-loreaux', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot', 'or4nge19'] nobody
108-2462
3 months ago
108-2462
108 days ago
10-6519
10 days
34053 christian-oudard
author:christian-oudard
 feat: Add error function (erf) and complementary error function (erfc) ## Summary I was doing some finance math and needed the Error Function, so I thought I'd contribute it. ### Main definitions * `Real.erf`: The error function, defined as `(2/√π) ∫₀ˣ e^(-t²) dt` * `Real.erfc`: The complementary error function, defined as `1 - erf x` ### Main results * `Real.erf_zero`: `erf 0 = 0` * `Real.erf_neg`: `erf` is an odd function: `erf (-x) = -erf x` * `Real.erf_tendsto_one`: `erf x → 1` as `x → ∞` * `Real.erf_tendsto_neg_one`: `erf x → -1` as `x → -∞` * `Real.erf_le_one`: `erf x ≤ 1` for all `x` * `Real.neg_one_le_erf`: `-1 ≤ erf x` for all `x` * `Real.deriv_erf`: `deriv erf x = (2/√π) * exp(-x²)` * `Real.differentiable_erf`: `erf` is differentiable * `Real.continuous_erf`: `erf` is continuous * `Real.strictMono_erf`: `erf` is strictly monotone Also adds `erf` to `docs/overview.yaml` under Special Functions. --- - [x] Builds successfully - [x] `lake exe runLinter` passes - [x] `lake exe mk_all --check` passes t-analysis new-contributor awaiting-author 333/0 Mathlib.lean,Mathlib/Analysis/SpecialFunctions/Erf.lean,docs/overview.yaml 3 18 ['SnirBroshi', 'christian-oudard', 'github-actions', 'j-loreaux', 'plp127'] j-loreaux
assignee:j-loreaux
107-68131
3 months ago
108-18584
108 days ago
14-69133
14 days
33601 nielstron
author:nielstron
 feat(Computability/ContextFreeGrammar): Concatenation of CFGs is CFG --- - [ ] depends on: #33599 - [ ] depends on: #33592 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-computability new-contributor blocked-by-other-PR 941/0 Mathlib/Computability/ContextFreeGrammar.lean 1 2 ['github-actions', 'mathlib4-dependent-issues-bot'] nobody
107-45844
3 months ago
137-29707
137 days ago
0-412
6 minutes
33080 sinhp
author:sinhp
 feat(Category Theory): Cartesian Natural Transformation This PR defines cartesian natural transformations between functors and proves they are closed under horizontal and vertical composition. Also we prove the following results: - `NatTrans.isCartesian_of_discrete` shows that any natural transformation between functors from a discrete category is cartesian. - `NatTrans.isCartesian_of_isIso` shows that any natural isomorphism is cartesian. - `NatTrans.isIso_of_isCartesian_of_isIso_app_terminal` shows that a cartesian natural transformation is an isomorphism if its component at a terminal object is an isomorphism. - `NatTrans.isCartesian_of_isPullback_isTerminal_from` shows that a natural transformation is cartesian if all its naturality squares to the terminal object are pullback squares. This material is adapted from the polynomial functors project developed during the Trimester "Prospects of Formal Mathematics" at the Hausdorff Institute (HIM) in Bonn: https://github.com/sinhp/Poly Co-authored-by: Wojciech Nawrocki --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-category-theory awaiting-author 145/0 Mathlib.lean,Mathlib/CategoryTheory/NatTransCartesian.lean 2 8 ['dagurtomas', 'github-actions', 'joelriou', 'robin-carlier', 'sinhp'] nobody
106-48534
3 months ago
142-20164
142 days ago
3-19675
3 days
34397 Parcly-Taxel
author:Parcly-Taxel
 feat: integral representation of the AGM --- - [x] depends on: #32892 t-analysis awaiting-author 294/0 Mathlib.lean,Mathlib/Analysis/SpecialFunctions/Integrals/ArithmeticGeometricMean.lean 2 2 ['github-actions', 'mathlib4-dependent-issues-bot', 'sgouezel'] sgouezel
assignee:sgouezel
106-39871
3 months ago
106-39871
106 days ago
7-50633
7 days
34018 CoolRmal
author:CoolRmal
 feat: series representation of cosecant This PR adds 1. Some trignometric identities. 2. `tprod_pnat_odd_mul_even`, which is an invariant of [tprod_even_mul_odd](https://leanprover-community.github.io/mathlib4_docs/Mathlib/Topology/Algebra/InfiniteSum/NatInt.html#tprod_even_mul_odd) 3. a series representation of `fun z => π / sin (π * z)`. An outline of the proof can be found in the PNT project: https://alexkontorovich.github.io/PrimeNumberTheoremAnd/blueprint/zeta-chapter.html#lem:abadeuleulmit1 --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-analysis awaiting-author 140/0 Mathlib/Analysis/SpecialFunctions/Trigonometric/Basic.lean,Mathlib/Analysis/SpecialFunctions/Trigonometric/Complex.lean,Mathlib/Analysis/SpecialFunctions/Trigonometric/Cotangent.lean,Mathlib/Topology/Algebra/InfiniteSum/NatInt.lean 4 12 ['CBirkbeck', 'CoolRmal', 'erdOne', 'github-actions', 'loefflerd'] kex-y
assignee:kex-y
106-30831
3 months ago
106-30831
106 days ago
20-27591
20 days
34726 GrigorenkoPV
author:GrigorenkoPV
 feat(Analysis/SpecialFunctions/Trigonometric/Basic): sin and cos of multiples of π / 3 --- Merge of https://github.com/leanprover-community/mathlib4/pull/26349 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor 159/0 Mathlib/Algebra/Order/Monoid/NatCast.lean,Mathlib/Analysis/SpecialFunctions/Trigonometric/Basic.lean,Mathlib/Data/Nat/Cast/Defs.lean,MathlibTest/trigonometry.lean 4 1 ['github-actions'] nobody
106-4869
3 months ago
106-4869
106 days ago
3-20994
3 days
34892 kim-em
author:kim-em
 experiment: by claude LLM-generated 88/0 claude.md 1 1 ['github-actions'] nobody
105-84440
3 months ago
unknown
0-0
0 seconds
29788 robertmaxton42
author:robertmaxton42
 feat(Topology): adds bundled continuous maps for sum, sigma, subtype, mapsto, inclusion Adds a collection of bundled continuous maps and homeomorphisms, and helper lemmas for working with their compositions. Bundling of existing continuity lemmas: * `ContinuousMap.subtypeVal` * `ContinuousMap.inl` and `.inr`; `ContinuousMap.sum` bundles `Continuous.sumElim`; `ContinuousMap.sumMap`, which is a quotient map when both components are quotient maps * `ContinuousMap.sigmaMap`, which is a quotient map when given a family of quotient maps * `ContinuousMap.mapsTo` bundles `ContinuousOn.restrict_mapsTo` New functions: * `ContinuousMap.preimageValIncl : C(s ↓∩ t, t)` and `.inclPreimageVal C(s, t ↓∩ s)`, and their unbundled functions in `Set` * `Homeomorph.Set.preimageVal` witnesses that the two are opposite directions of a homeomorphism * Descending from a coherent set of subspaces is a quotient map The primary use for these bundled maps is easy composition and the ability to introduce them by rewriting right-to-left: it is much more convenient to write `subtypeVal.comp _` than to use either the anonymous constructor (which doesn't work in any position without an expected type) or `ContinuousMap.mk` (which will disappear as soon as it is coerced to a function, making it difficult to use in mixed-categorical contexts where many maps can only be reduced by introducing a composition with some other map.) This PR is part of a family of PRs that ultimately construct transformations in both directions between the concrete `Topology.RelCWComplex` and abstract `TopCat.RelativeCWComplex`. `.mapsTo` in particular bundles together a couple of potentially nontrivial proofs in a way that makes them easy to refer to later; I use it and `.subtypeVal` particularly heavily later in a dependent PR to build the cell inclusion maps on both sides of the equivalence. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) large-import t-topology awaiting-author 227/2 Mathlib/Data/Set/Subset.lean,Mathlib/Topology/Category/TopCat/Limits/Products.lean,Mathlib/Topology/Coherent.lean,Mathlib/Topology/Constructions.lean,Mathlib/Topology/Constructions/SumProd.lean,Mathlib/Topology/ContinuousMap/Basic.lean,scripts/noshake.json 7 17 ['adamtopaz', 'dagurtomas', 'github-actions', 'mathlib4-merge-conflict-bot', 'robertmaxton42'] adamtopaz
assignee:adamtopaz
105-49843
3 months ago
106-20833
106 days ago
85-42529
85 days
31361 alreadydone
author:alreadydone
 feat(Algebra/Order): convex subgroups --- - [x] depends on: #32886 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra t-order awaiting-author
label:t-algebra$
 422/0 Mathlib.lean,Mathlib/Algebra/Order/Archimedean/Class.lean,Mathlib/Algebra/Order/Group/Convex.lean,Mathlib/Algebra/Order/Group/Height.lean,Mathlib/Order/Birkhoff.lean,Mathlib/Order/Quotient.lean 5 46 ['Vierkantor', 'YaelDillies', 'alreadydone', 'github-actions', 'kckennylau', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot', 'vihdzp', 'wwylele'] YaelDillies
assignee:YaelDillies
105-39919
3 months ago
36-16559
36 days ago
28-36362
28 days
34394 Citronhat
author:Citronhat
 feat(Algebra/Order/Ring): add constructors for linear ordered rings Add constructors for ordered rings from `mul_nonneg` / `mul_pos` that derive `ZeroLEOneClass` from a linear order. new-contributor t-algebra awaiting-author
label:t-algebra$
 31/14 Mathlib/Algebra/Order/Ring/Defs.lean,Mathlib/RingTheory/HahnSeries/Lex.lean 2 6 ['Citronhat', 'Vierkantor', 'github-actions', 'leanprover-radar'] Vierkantor
assignee:Vierkantor
105-38206
3 months ago
105-38206
105 days ago
12-25418
12 days
26884 alreadydone
author:alreadydone
 Universal cover TODO: construct locally constant predicate from a functor from the fundamental groupoid of a loc path connected, semilocally simply connected space to Type, and the associated covering space (as an etale space) --- - [x] depends on: #24983 - [x] depends on: #22771 - [ ] depends on: #31925 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) WIP t-topology blocked-by-other-PR merge-conflict 900/165 Mathlib.lean,Mathlib/AlgebraicGeometry/Modules/Tilde.lean,Mathlib/AlgebraicGeometry/ProjectiveSpectrum/StructureSheaf.lean,Mathlib/Data/Set/Operations.lean,Mathlib/Geometry/Manifold/Sheaf/Smooth.lean,Mathlib/Logic/Equiv/Basic.lean,Mathlib/Topology/EtaleSpace.lean,Mathlib/Topology/IsLocalHomeomorph.lean,Mathlib/Topology/Sheaves/LocalPredicate.lean,Mathlib/Topology/Sheaves/Sheafify.lean,Mathlib/Topology/Sheaves/Stalks.lean 11 4 ['github-actions', 'leanprover-community-bot-assistant', 'mathlib-merge-conflicts', 'mathlib4-dependent-issues-bot'] nobody
104-84553
3 months ago
unknown
0-0
0 seconds
31925 alreadydone
author:alreadydone
 feat(Topology): étalé space associated to a predicate on sections Zulip: https://leanprover.zulipchat.com/#narrow/channel/144837-PR-reviews/topic/.2322782.20Etale.20space/near/527381645 --- - [ ] depends on: #33795 migrated from #22782 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-topology blocked-by-other-PR merge-conflict 900/165 Mathlib.lean,Mathlib/AlgebraicGeometry/Modules/Tilde.lean,Mathlib/AlgebraicGeometry/ProjectiveSpectrum/StructureSheaf.lean,Mathlib/Data/Set/Operations.lean,Mathlib/Geometry/Manifold/Sheaf/Smooth.lean,Mathlib/Logic/Equiv/Basic.lean,Mathlib/Topology/EtaleSpace.lean,Mathlib/Topology/IsLocalHomeomorph.lean,Mathlib/Topology/Sheaves/LocalPredicate.lean,Mathlib/Topology/Sheaves/Sheafify.lean,Mathlib/Topology/Sheaves/Stalks.lean 11 16 ['adamtopaz', 'alreadydone', 'github-actions', 'mathlib-merge-conflicts', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] adamtopaz
assignee:adamtopaz
104-83521
3 months ago
133-20299
133 days ago
26-56538
26 days
34956 kbuzzard
author:kbuzzard
 test: add a file with universe tests Just to keep track of some horrible universe issues in Kaehler.Polynomial. This shouldn't be a PR, I just wanted a way of keeping track of the mess that universe normalisation in core causes in alg geom. If core moves on universe normalization then this file hopefully provides a useful test. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-ring-theory WIP 266/0 Mathlib/RingTheory/Kaehler/UniverseTest.lean 1 1 ['github-actions'] nobody
104-7523
3 months ago
49-30564
49 days ago
54-63437
54 days
33493 michelsol
author:michelsol
 feat(RingTheory/Polynomial): An explicit formula for the Chebyshev polynomials of the first kind Adds the following explicit formula on the Chebyshev polynomial of the first kind of order n. ${ T_{n}(x)\ =\ \sum \limits _{k=0}^{\lfloor {\frac {n}{2}}\rfloor } {\binom {n}{2k}} \left(\ X^{2}-1\ \right)^{k}\ X^{n-2k}}$ This explicit formula can be found [here](https://en.wikipedia.org/wiki/Chebyshev_polynomials#Explicit_expressions). There is a proof using complex numbers but it only works if the ring R = ℂ. The proof here is by induction and works in a commutative ring R. Mathlib seems to extend the definition of Chebyshev polynomials for $n \in \mathbb{Z}$ but this would make the formula more cumbersome with `n.natAbs` in place of `n`'s, so I expressed it on `n : ℕ` directly. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-ring-theory new-contributor awaiting-author 51/1 Mathlib/RingTheory/Polynomial/Chebyshev.lean 1 8 ['YuvalFilmus', 'erdOne', 'github-actions', 'metakunt', 'michelsol'] chrisflav
assignee:chrisflav
103-74445
3 months ago
103-74445
103 days ago
35-16105
35 days
28468 alreadydone
author:alreadydone
 feat(Algebra): ring API for `AddLocalization` Extract `Submonoid.IsLocalizationMap` from `LocalizationMap` and use it in `IsLocalization`. Develop basic API for AddLocalization at a two-sided ideal; in the case of the top AddSubmonoid, show the localization has a Ring structure (Grothendieck ring). Show that a nontrivial commutative semiring with cancellative addition satisfies the strong rank condition. (This will eventually be replaced by Yi-Jia Tan's result which shows cancellative addition is unnecessary, so it's also reasonable to leave this part out of this PR.) --- - [x] depends on: #27842 - [x] depends on: #27862 - [x] depends on: #29596 - [x] depends on: #29597 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra large-import t-ring-theory awaiting-author
label:t-algebra$
 676/6 Mathlib.lean,Mathlib/GroupTheory/MonoidLocalization/Archimedean.lean,Mathlib/GroupTheory/MonoidLocalization/Basic.lean,Mathlib/GroupTheory/MonoidLocalization/Lemmas.lean,Mathlib/RingTheory/IsTensorProduct.lean,Mathlib/RingTheory/Localization/Additive.lean,Mathlib/RingTheory/Localization/Defs.lean,Mathlib/RingTheory/Localization/StrongRankCondition.lean 8 12 ['alreadydone', 'chrisflav', 'erdOne', 'github-actions', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] chrisflav
assignee:chrisflav
103-70157
3 months ago
103-70157
103 days ago
23-7335
23 days
30658 grunweg
author:grunweg
 feat: extend the `whitespace` linter to proof bodies --- - [x] depends on: #30663 - [x] depends on: #30685 - [x] depends on: #30687 - [x] depends on: #30688 - [x] depends on: #30689 - [x] depends on: #30691 - [x] depends on: #30723 - [x] depends on: #30724 - [x] depends on: #30725 - [x] depends on: leanprover/lean4#11780 - [x] depends on: leanprover/lean4#12006 - [ ] depends on: leanprover/lean4#11686 - [x] depends on: #33705 - [x] depends on: #33706 - [x] depends on: #33716 - [x] depends on: #33234 - [x] depends on: #33342 - [x] depends on: #33708 - [x] depends on: #33758 - [x] depends on: #33759 - [x] depends on: #33789 - [x] depends on: #33815 - [x] depends on: #33816 - [x] depends on: #35909 - [x] depends on: #37993 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) large-import t-linter merge-conflict blocked-by-other-PR 2006/452 Archive/Imo/Imo2010Q5.lean,Archive/Wiedijk100Theorems/BuffonsNeedle.lean,Counterexamples/CliffordAlgebraNotInjective.lean,Counterexamples/HeawoodUnitDistance.lean,Mathlib/Algebra/AffineMonoid/Basic.lean,Mathlib/Algebra/Algebra/Subalgebra/Lattice.lean,Mathlib/Algebra/Category/Grp/EpiMono.lean,Mathlib/Algebra/Category/Ring/Basic.lean,Mathlib/Algebra/Module/TransferInstance.lean,Mathlib/Algebra/Order/CauSeq/Basic.lean,Mathlib/Algebra/Polynomial/RuleOfSigns.lean,Mathlib/Algebra/Quaternion.lean,Mathlib/AlgebraicGeometry/EllipticCurve/Jacobian/Basic.lean,Mathlib/AlgebraicGeometry/EllipticCurve/Projective/Basic.lean,Mathlib/AlgebraicGeometry/EllipticCurve/Projective/Formula.lean,Mathlib/AlgebraicTopology/ExtraDegeneracy.lean,Mathlib/AlgebraicTopology/SimplicialSet/Boundary.lean,Mathlib/AlgebraicTopology/SimplicialSet/CompStructTruncated.lean,Mathlib/AlgebraicTopology/SimplicialSet/Nonempty.lean,Mathlib/AlgebraicTopology/SimplicialSet/Path.lean,Mathlib/AlgebraicTopology/SimplicialSet/StrictSegal.lean,Mathlib/Analysis/CStarAlgebra/ContinuousFunctionalCalculus/Unital.lean,Mathlib/Analysis/Normed/Algebra/Spectrum.lean,Mathlib/Analysis/Normed/Module/Bases.lean,Mathlib/Analysis/Real/Pi/Bounds.lean,Mathlib/CategoryTheory/Limits/Cones.lean,Mathlib/CategoryTheory/Limits/Shapes/BinaryProducts.lean,Mathlib/CategoryTheory/Monoidal/Action/Basic.lean,Mathlib/CategoryTheory/Monoidal/Cartesian/CommGrp_.lean,Mathlib/CategoryTheory/Monoidal/Mon_.lean,Mathlib/CategoryTheory/Monoidal/OfHasFiniteProducts.lean,Mathlib/Combinatorics/SetFamily/LYM.lean,Mathlib/Computability/AkraBazzi/AkraBazzi.lean,Mathlib/Computability/ContextFreeGrammar.lean,Mathlib/Computability/Language.lean,Mathlib/Computability/Partrec.lean,Mathlib/Computability/PartrecCode.lean,Mathlib/Data/DFinsupp/Notation.lean,Mathlib/Data/ENNReal/Basic.lean,Mathlib/Data/EReal/Operations.lean,Mathlib/Data/Fin/Fin2.lean,Mathlib/Data/Finset/Slice.lean,Mathlib/Data/Finset/Sort.lean,Mathlib/Data/Finsupp/Notation.lean,Mathlib/Data/Matrix/Cartan.lean,Mathlib/Data/NNReal/Defs.lean,Mathlib/Data/Num/Bitwise.lean,Mathlib/Data/PNat/Xgcd.lean,Mathlib/Data/Sym/Sym2.lean,Mathlib/Data/Vector/MapLemmas.lean,Mathlib/FieldTheory/CardinalEmb.lean,Mathlib/FieldTheory/Finite/Extension.lean,Mathlib/FieldTheory/Laurent.lean,Mathlib/Geometry/Manifold/Notation.lean,Mathlib/Geometry/Manifold/VectorBundle/Tensoriality.lean,Mathlib/LinearAlgebra/TensorPower/Symmetric.lean,Mathlib/LinearAlgebra/TensorProduct/Defs.lean,Mathlib/MeasureTheory/Function/ConditionalExpectation/PullOut.lean,Mathlib/MeasureTheory/Integral/IntervalIntegral/TrapezoidalRule.lean,Mathlib/MeasureTheory/Integral/TorusIntegral.lean,Mathlib/MeasureTheory/Measure/Haar/InnerProductSpace.lean,Mathlib/MeasureTheory/Measure/MeasureSpace.lean,Mathlib/ModelTheory/Syntax.lean,Mathlib/NumberTheory/Niven.lean,Mathlib/NumberTheory/Primorial.lean,Mathlib/RepresentationTheory/Coinduced.lean,Mathlib/RingTheory/Artinian/Module.lean,Mathlib/RingTheory/FormalGroup/Basic.lean,Mathlib/RingTheory/Nilpotent/Exp.lean,Mathlib/Tactic/Linter/DirectoryDependency.lean,Mathlib/Tactic/Linter/Whitespace.lean,Mathlib/Tactic/Ring/NamePolyVars.lean,Mathlib/Topology/Algebra/IsUniformGroup/Defs.lean,Mathlib/Topology/Category/TopCat/Limits/Basic.lean,Mathlib/Util/Superscript.lean,MathlibTest/WhitespaceLinter.lean 82 68 ['SnirBroshi', 'adomani', 'github-actions', 'grunweg', 'leanprover-radar', 'mathlib-dependent-issues', 'mathlib-merge-conflicts', 'mathlib4-merge-conflict-bot'] nobody
103-69228
3 months ago
38-84886
38 days ago
0-34802
9 hours
34897 kim-em
author:kim-em
 experiment: Claude defining reductive groups This PR adds preliminary definitions for reductive algebraic groups, following Borel's definition over general fields. ## Status: Experimental Sketch This is scaffolding with known mathematical issues. See `Mathlib/Algebra/AlgebraicGroup/PLAN.md` for a detailed roadmap of what's needed for correct definitions. ### What's Here | Definition | Status | Notes | |------------|--------|-------| | `AffineAlgGroup k A` | OK | Smooth affine group scheme of finite type | | `AlgPoints k A` | Partial | Correct type, Group instance is `sorry` | | `NoNontrivialIdempotents` | OK | For connectedness | | `IsUnipotent` | Wrong | Vacuous in reduced rings (see below) | | `unipotentRadical` | Wrong | Should be Hopf ideal, not Subgroup | | `ReductiveGroup` | Placeholder | Uses `True` pending dependencies | ### Known Mathematical Issues 1. **`IsUnipotent` is vacuous**: Definition checks nilpotence in reduced ring A, so only g=1 satisfies it. Correct definition requires comodule theory. 2. **Need functor of points, not just k-points**: Should define `A →ₐ[k] R` for all k-algebras R, not just `A →ₐ[k] k`. 3. **`unipotentRadical` should be a Hopf ideal**: Closed subgroup schemes correspond to Hopf ideals, not subgroups of points. 4. **Geometric notions missing**: Unipotent/connected/reductive should be defined after base change to k̄. ### Roadmap (see PLAN.md) 1. **Functor of points**: Group structure on R-points via convolution 2. **Hopf ideals**: For closed subgroup schemes 3. **Geometric infrastructure**: Base change, geometric connectedness 4. **Comodule theory**: For correct `IsUnipotent` 5. **Unipotent radical**: As Hopf ideal (very hard - SGA3/Borel level) Alternative: Define "linearly reductive" via complete reducibility (simpler, equivalent in char 0). ## References - Brian Conrad, "Reductive Group Schemes" - Armand Borel, "Linear Algebraic Groups" - SGA3, Exposé XIX 🤖 Prepared with Claude Code t-algebra LLM-generated merge-conflict
label:t-algebra$
 753/0 Mathlib.lean,Mathlib/Algebra/AlgebraicGroup/Defs.lean,Mathlib/Algebra/AlgebraicGroup/PLAN.md,Mathlib/Algebra/AlgebraicGroup/Reductive.lean,Mathlib/Algebra/AlgebraicGroup/Unipotent.lean 5 2 ['github-actions', 'mathlib-merge-conflicts'] nobody
103-59415
3 months ago
unknown
0-0
0 seconds
34815 Deep0Thinking
author:Deep0Thinking
 feat(Analysis/SpecialFunctions/ImproperIntegrals): Frullani integral - [x] depends on: #34966 --- Add a proof of **Frullani integral**. Main theorems: - `Frullani.integral_Ioi` - `IntegrableOn.tendsto_integral_Ioi` - `exists_integral_div_eq_mul_log` Supporting lemmas: - `Frullani.comp_mul_left_div` - `Frullani.intervalIntegrable_div` - `Frullani.exists_integral_div_eq_mul_log` - `Ioi_diff_Ioc` - `ContinuousOn.comp_mul_left_div`, `ContinuousOn.comp_mul_right_div` - `ContinuousOn.comp_mul_left`, `ContinuousOn.comp_mul_right` --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor large-import t-analysis awaiting-author blocked-by-other-PR 270/2 Mathlib/Analysis/SpecialFunctions/ImproperIntegrals.lean,Mathlib/MeasureTheory/Integral/IntervalIntegral/MeanValue.lean,Mathlib/Topology/Algebra/GroupWithZero.lean,Mathlib/Topology/Algebra/Monoid.lean 6 17 ['CoolRmal', 'Deep0Thinking', 'github-actions', 'mathlib-dependent-issues', 'mathlib-merge-conflicts', 'sgouezel'] urkud
assignee:urkud
103-58160
3 months ago
27-8210
27 days ago
11-36072
11 days
9820 jjaassoonn
author:jjaassoonn
 feat(RingTheory/GradedAlgebra/HomogeneousIdeal): generalize to homogeneous submodule The definitions, constructions and theorems in `HomogeneousIdeal.lean` are generalized to a homogeneous submodules. So say $R$ is a ring and $M \cong \bigoplus_{i} M_i$ is an $R$-module. Then a homogeneous $R$-submodule of $M$ is an $R$-submodule $N$ such that for all $i$ and $n \in N$, $n_i \in N$. Note that this notion doesn't actually require $R$ to be graded and $M$ is a graded module. But for more interesting lemmas, we do need that $M$ is graded $R$-module. We bake the fact $R$ is graded into the definition of homogeneous submodule, otherwise, `CompleteLattice HomogeneousSubmodule` cannot find the order of synthesis (the proof depends on that $R$ is graded) All definitions/constructions/theorems have a copy for ideals as well, this is to make sure dot notation still works. The motivation of this generalization is graded quotient module --- - [x] depends on:#18728 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-ring-theory 516/185 Mathlib/Algebra/Module/GradedModule.lean,Mathlib/AlgebraicGeometry/ProjectiveSpectrum/Scheme.lean,Mathlib/AlgebraicGeometry/ProjectiveSpectrum/Topology.lean,Mathlib/RingTheory/GradedAlgebra/Homogeneous/Ideal.lean,Mathlib/RingTheory/GradedAlgebra/Homogeneous/Submodule.lean,Mathlib/RingTheory/GradedAlgebra/Radical.lean,scripts/nolints_prime_decls.txt 7 3 ['github-actions', 'leanprover-community-bot-assistant'] nobody
102-44431
3 months ago
321-67672
321 days ago
52-59768
52 days
27664 pechersky
author:pechersky
 feat(Topology,Analysis): discrete topology metric space and normed groups Explicit construction of the discrete topology metric space and normed groups where `dist x y = 1` for all `x != y` Provide PseudoMetricSpace, MetricSpace, Seminormed(Add)Group, and Normed(Add)Group constructions --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) awaiting-author t-topology merge-conflict 124/0 Mathlib/Analysis/Normed/Group/Basic.lean,Mathlib/Topology/MetricSpace/Basic.lean,Mathlib/Topology/MetricSpace/Pseudo/Constructions.lean 3 14 ['github-actions', 'kckennylau', 'mathlib-merge-conflicts', 'mathlib4-merge-conflict-bot', 'pechersky', 'plp127'] urkud
assignee:urkud
102-16154
3 months ago
182-25995
182 days ago
114-32890
114 days
14501 jjaassoonn
author:jjaassoonn
 feat: module structure of filtered colimit of abelian groups over filtered colimit of rings This helps defining the module structure of stalks This contribution was inspired by the AIM workshop "Formalizing algebraic geometry" in June 2024. --- - [x] depends on: #15315 [I am going to move the result in the new file] [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra workshop-AIM-AG-2024 t-category-theory merge-conflict awaiting-author
label:t-algebra$
 439/2 Mathlib/CategoryTheory/Limits/ConcreteCategory/Basic.lean,Mathlib/CategoryTheory/Limits/ConcreteCategory/WithAlgebraicStructures.lean 2 49 ['YaelDillies', 'adamtopaz', 'alreadydone', 'erdOne', 'github-actions', 'jjaassoonn', 'joelriou', 'kbuzzard'] joelriou
assignee:joelriou
101-37012
3 months ago
542-25280
542 days ago
64-30806
64 days
26986 WangYiran01
author:WangYiran01
 feat(Partition): add bijection for partitions with max part ≤ r This PR adds a new theorem `partition_max_equals_bound` to `Mathlib.Combinatorics.Enumerative.Partition`. It constructs a bijection between: - The set of partitions of `n` in which `r ∈ π.parts` and all parts are `≤ r`, and - The set of partitions of `n - r` whose largest part is at most `r`. This provides a constructive proof via removing/adding `r` from/to the partition multiset, in line with classical enumerative combinatorics. Contributed by Yiran Wang. awaiting-author t-combinatorics new-contributor merge-conflict 92/0 Mathlib/Combinatorics/Enumerative/Partition/Basic.lean,Mathlib/Data/Multiset/Lattice.lean 2 20 ['WangYiran01', 'github-actions', 'jcommelin', 'kckennylau', 'kim-em', 'mathlib-merge-conflicts', 'mathlib4-merge-conflict-bot'] b-mehta
assignee:b-mehta
101-22919
3 months ago
134-45787
134 days ago
120-67067
120 days
25035 ScottCarnahan
author:ScottCarnahan
 feat(Algebra/Module/Equiv/Defs): linear equivalence between linear hom and semilinear hom Given a ring homomorphism `σ₂ : R →+* R₂`, an `R`-module `M`, and a module `M₂` for both `R` and `R₂` satisfying `SMulCommClass R R₂ M₂` and `(σ₂ r) • x = r • x`, we produce an `R₂`-linear equivalence between `M →ₗ[R] M₂` and `M →ₛₗ[σ₂] M₂`. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) WIP t-algebra merge-conflict
label:t-algebra$
 21/0 Mathlib/Algebra/Module/Equiv/Defs.lean 1 2 ['github-actions', 'mathlib-merge-conflicts'] nobody
101-3910
3 months ago
347-53868
347 days ago
20-7584
20 days
26168 oliver-butterley
author:oliver-butterley
 feat(MeasureTheory.VectorMeasure): variation defined as a supremum is equal to variation defined using the Hahn-Jordan decomposition Add `signedMeasure_totalVariation_eq`: if `μ` is a `SignedMeasure` then variation defined as a supremum is equal to variation defined using the Hahn-Jordan decomposition. Co-authored-by: @yoh-tanimoto --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-measure-probability awaiting-author merge-conflict blocked-by-other-PR new-contributor 916/0 Mathlib.lean,Mathlib/MeasureTheory/VectorMeasure/Decomposition/Jordan.lean,Mathlib/MeasureTheory/VectorMeasure/Variation/Equiv.lean 5 7 ['github-actions', 'mathlib-merge-conflicts', 'mathlib4-merge-conflict-bot', 'yoh-tanimoto'] nobody
101-3908
3 months ago
321-46175
321 days ago
15-65390
15 days
34722 GrigorenkoPV
author:GrigorenkoPV
 feat(Data/Finset/RangeDistance): bound distance between elements of `Finset.range` --- Rebase of https://github.com/leanprover-community/mathlib4/pull/26347 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor t-data awaiting-author 34/0 Mathlib.lean,Mathlib/Algebra/Order/Group/Unbundled/Abs.lean,Mathlib/Data/Finset/RangeDistance.lean 3 7 ['GrigorenkoPV', 'Vierkantor', 'github-actions', 'joneugster', 'mathlib-splicebot', 'plp127'] pechersky
assignee:pechersky
100-75597
3 months ago
57-12959
57 days ago
52-18954
52 days
35114 CoolRmal
author:CoolRmal
 feat: Kirszbraun’s theorem --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-analysis 144/0 Mathlib/Analysis/Kirszbraun.lean 1 1 ['github-actions'] nobody
100-62683
3 months ago
unknown
0-0
0 seconds
27702 FLDutchmann
author:FLDutchmann
 feat(NumberTheory/SelbergSieve): define Lambda-squared sieves and prove important properties This PR continues the work from #22052. Original PR: https://github.com/leanprover-community/mathlib4/pull/22052 - [x] depends on: #27820 t-number-theory delegated merge-conflict 186/7 Mathlib/NumberTheory/SelbergSieve.lean 1 44 ['FLDutchmann', 'MichaelStollBayreuth', 'bryangingechen', 'github-actions', 'jcommelin', 'mathlib-bors', 'mathlib-merge-conflicts', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] MichaelStollBayreuth
assignee:MichaelStollBayreuth
100-55738
3 months ago
162-51783
162 days ago
15-82750
15 days
28693 faenuccio
author:faenuccio
 feat(Analysis.Normed.Module.Milman-Pettis): add Milman-Pettis theorem We add the Milman-Pettis theorem stating that an uniformly convex Banach space is reflexive. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) WIP t-analysis merge-conflict 279/0 Mathlib/Analysis/Convex/Uniform.lean,Mathlib/Analysis/Normed/Module/Dual.lean,Mathlib/Analysis/Normed/Module/Milman-Pettis.lean,Mathlib/Topology/Algebra/Module/WeakDual.lean 4 9 ['ADedecker', 'faenuccio', 'github-actions', 'grunweg', 'mathlib-merge-conflicts', 'yhx-12243'] nobody
100-55612
3 months ago
275-31114
275 days ago
0-1
1 second
31141 peabrainiac
author:peabrainiac
 feat(Analysis/Calculus): parametric integrals over smooth functions are smooth Show that for any smooth function `f : H × ℝ → E`, the parametric integral `fun x ↦ ∫ t in a..b, f (x, t) ∂μ` is smooth too. The argument proceeds inductively, using the fact that derivatives of parametric integrals can themselves be computed as parametric integrals. The necessary lemmas on derivatives of parametric integrals already existed, but took some work to apply due to their generality; we state some convenient special cases. --- - [x] depends on: #31077 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-analysis awaiting-author maintainer-merge 470/12 Mathlib/Analysis/Calculus/ParametricIntegral.lean,Mathlib/Analysis/Calculus/ParametricIntervalIntegral.lean,Mathlib/MeasureTheory/Integral/DominatedConvergence.lean,Mathlib/Topology/NhdsWithin.lean,Mathlib/Topology/Separation/Regular.lean 5 36 ['fpvandoorn', 'github-actions', 'j-loreaux', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot', 'peabrainiac', 'sgouezel'] j-loreaux
assignee:j-loreaux
100-38350
3 months ago
100-38350
100 days ago
33-85043
33 days
29499 chrisflav
author:chrisflav
 feat(CategoryTheory/Sites): sheafification via hypercovers This is very much WIP, but I need a fresh cache. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) WIP t-category-theory merge-conflict 1944/4 Mathlib.lean,Mathlib/CategoryTheory/Sites/HomotopyOneHypercover.lean,Mathlib/CategoryTheory/Sites/Hypercover/Homotopy.lean,Mathlib/CategoryTheory/Sites/Hypercover/One.lean,Mathlib/CategoryTheory/Sites/Hypercover/Refinement.lean,Mathlib/CategoryTheory/Sites/Hypercover/Sheafification.lean,Mathlib/CategoryTheory/Sites/Hypercover/Zero.lean 7 3 ['github-actions', 'mathlib-merge-conflicts', 'mathlib4-merge-conflict-bot'] nobody
100-7399
3 months ago
unknown
0-0
0 seconds
33969 goliath-klein
author:goliath-klein
 refactor(PiTensorProduct/{InjectiveNorm, ProjectiveNorm}): Currently, injectiveSeminorm = projectiveSeminorm **WIP / RFC!** Arguably, `injectiveSeminorm` should be re-defined in Mathlib. See #34137 and [Zulip](https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/injectiveSeminorm/with/568798261) for context. In this file, we collect some results about the current definition and a possible alternative. Contents: * A theorem `injectiveSeminorm_eq_projectiveSeminorm` formalizing the equality of the current definitions. However, I think it is unlikely that keeping the alternative characterization would be worth the effort. The interesting direction `(L2') ≤ (L1)` follows from `norm_eval_le_projectiveSeminorm` which is still present. The converse direction is [somewhat tautological](https://github.com/leanprover-community/mathlib4/pull/34137). A proof of `(L2) = (L1)` (probably requiring Hahn-Banach) might be more interesting. * A preliminary implementation of the injective seminorm as commonly understood. * Sufficient conditions for the multiplicativity property `‖⨂ m i‖_∧ = ∏ ‖m i‖` to hold. This implements a TBD item. --- Co-authored-by: Davood H. H. Tehrani [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) WIP t-analysis new-contributor large-import merge-conflict 774/387 Mathlib.lean,Mathlib/Analysis/Normed/Module/Dual.lean,Mathlib/Analysis/Normed/Module/HahnBanach.lean,Mathlib/Analysis/Normed/Module/PiTensorProduct/InjectiveSeminorm.lean,Mathlib/Analysis/Normed/Module/PiTensorProduct/LeastReasonable.lean,Mathlib/Analysis/Normed/Module/PiTensorProduct/ProjectiveSeminorm.lean,Mathlib/Analysis/Normed/Operator/Basic.lean,Mathlib/LinearAlgebra/PiTensorProduct.lean 8 3 ['github-actions', 'goliath-klein', 'mathlib-merge-conflicts'] nobody
100-6269
3 months ago
128-21373
128 days ago
0-23
23 seconds
34248 erdOne
author:erdOne
 chore: get rid of `LocalizedModule.mk` --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) awaiting-author t-algebra merge-conflict
label:t-algebra$
 64/65 Mathlib/Algebra/Module/LocalizedModule/Basic.lean,Mathlib/Algebra/Module/LocalizedModule/Exact.lean,Mathlib/AlgebraicGeometry/Modules/Tilde.lean,Mathlib/GroupTheory/DivisibleHull.lean,Mathlib/RingTheory/Localization/BaseChange.lean,Mathlib/RingTheory/Localization/Module.lean 6 3 ['Vierkantor', 'github-actions', 'mathlib-merge-conflicts', 'vihdzp'] nobody
100-6140
3 months ago
120-38018
120 days ago
0-15155
4 hours
27307 xyzw12345
author:xyzw12345
 feat(RingTheory/GradedAlgebra): homogeneous relation In this PR, we defined the concept of a homogeneous relation and proved some properties about homogeneous relations. The main result of this PR is showing that taking `RingQuot` by a homogeneous relation can give a graded structure on the quotient ring. This result can be used to define graded structures on rings obtained using `RingQuot`, e.g. the Symmetric Algebra defined in #21539 can be verified to have such a structure. Co-authored-by: Zhixuan Dai @atstarrysky <22300180006@m.fudan.edu.cn> Yiming Fu @pelicanhere Zhenyan Fu @pumpkin678 Raphael Douglas Giles @Raph-DG Jiedong Jiang @jjdishere This PR continues the work from #22279. Original PR: https://github.com/leanprover-community/mathlib4/pull/22279 awaiting-author t-ring-theory 394/1 Mathlib.lean,Mathlib/Algebra/Algebra/Equiv.lean,Mathlib/Algebra/Colimit/Ring.lean,Mathlib/Algebra/DirectSum/Basic.lean,Mathlib/Algebra/DirectSum/Module.lean,Mathlib/Algebra/Module/LinearMap/Defs.lean,Mathlib/Algebra/Ring/Equiv.lean,Mathlib/Algebra/RingQuot.lean,Mathlib/RingTheory/GradedAlgebra/Basic.lean,Mathlib/RingTheory/GradedAlgebra/HomogeneousRelation.lean 10 46 ['AntoineChambert-Loir', 'alreadydone', 'chrisflav', 'erdOne', 'eric-wieser', 'github-actions', 'mathlib4-merge-conflict-bot', 'ocfnash', 'xyzw12345'] mattrobball
assignee:mattrobball
100-5210
3 months ago
188-17119
188 days ago
117-42266
117 days
34939 erdOne
author:erdOne
 chore(AlgebraicGeometry): use relative gluing in `IdealSheaf` --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebraic-geometry merge-conflict 174/381 Mathlib/AlgebraicGeometry/IdealSheaf/Subscheme.lean,Mathlib/AlgebraicGeometry/Sites/SmallAffineZariski.lean 2 2 ['github-actions', 'mathlib-merge-conflicts'] nobody
99-83814
3 months ago
99-83815
99 days ago
4-64009
4 days
33821 JohnnyTeutonic
author:JohnnyTeutonic
 feat(LinearAlgebra/Matrix/Hermitian): add IsSkewHermitian predicate Adds `IsSkewHermitian` predicate for matrices satisfying Aᴴ = -A. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra awaiting-author
label:t-algebra$
 70/0 Mathlib/LinearAlgebra/Matrix/Hermitian.lean 1 20 ['JohnnyTeutonic', 'github-actions', 'j-loreaux', 'themathqueen'] kim-em
assignee:kim-em
99-79517
3 months ago
100-9154
100 days ago
26-62209
26 days
33233 jazzits
author:jazzits
 feat(GroupTheory): add chosen group presentations and Tietze transformations (1) and (2) Defines a notion of group presentation for G compatible with Mathlib.GroupTheory.PresentedGroup: generators `ι → G` whose range generates G, and relators `rels : Set (FreeGroup ι)` whose normal closure equals the kernel of `FreeGroup ι →* G`. Provides the canonical map `PresentedGroup P.rels →* G` and equivalences showing `PresentedGroup P.rels ≃* G` and invariance under changing presentations. Also formalizes Tietze moves (1)–(2) as equivalences of PresentedGroups: adding/removing a relator that lies in the normal closure of the others. TODO: moves (3)–(4) (add/remove generator with a defining relation). No existing definitions are modified t-group-theory new-contributor awaiting-author 328/0 Mathlib.lean,Mathlib/GroupTheory/Presentation.lean 2 15 ['github-actions', 'homeowmorphism', 'jazzits', 'kbuzzard', 'mathlib-merge-conflicts', 'plp127', 'tb65536'] tb65536
assignee:tb65536
99-34802
3 months ago
144-27349
144 days ago
5-47944
5 days
34931 eric-wieser
author:eric-wieser
 perf: make TensorProduct.lift irreducible with a unification hint --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra merge-conflict
label:t-algebra$
 6/2 Mathlib/LinearAlgebra/TensorProduct/Basic.lean 1 7 ['eric-wieser', 'github-actions', 'leanprover-radar', 'mathlib-merge-conflicts'] erdOne
assignee:erdOne
99-12451
3 months ago
99-12452
99 days ago
5-66655
5 days
34725 GrigorenkoPV
author:GrigorenkoPV
 feat(RingTheory/RootsOfUnity/LowDegree): quadratic, cubic, quartic, quintic roots of unity Closes https://github.com/leanprover-community/mathlib4/pull/25907 --- Merge of https://github.com/leanprover-community/mathlib4/pull/25907 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor t-ring-theory awaiting-author 247/0 Mathlib.lean,Mathlib/Algebra/CharP/Invertible.lean,Mathlib/Algebra/QuadraticDiscriminant.lean,Mathlib/RingTheory/RootsOfUnity/LowDegree.lean 4 22 ['GrigorenkoPV', 'LLaurance', 'erdOne', 'github-actions', 'joneugster'] nobody
98-85892
3 months ago
103-75212
103 days ago
5-38408
5 days
33032 ksenono
author:ksenono
 feat(Combinatorics/SimpleGraph): Konig’s theorem on bipartite graphs --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-combinatorics new-contributor blocked-by-other-PR merge-conflict 832/251 Mathlib.lean,Mathlib/Combinatorics/SimpleGraph/Bipartite.lean,Mathlib/Combinatorics/SimpleGraph/Clique.lean,Mathlib/Combinatorics/SimpleGraph/DegreeSum.lean,Mathlib/Combinatorics/SimpleGraph/Konig/Auxillary.lean,Mathlib/Combinatorics/SimpleGraph/Konig/Konig.lean,Mathlib/Combinatorics/SimpleGraph/Konig/KonigFin.lean,Mathlib/Combinatorics/SimpleGraph/Matching.lean,Mathlib/Combinatorics/SimpleGraph/Subgraph.lean,Mathlib/Combinatorics/SimpleGraph/VertexCover.lean,Mathlib/SetTheory/Cardinal/Arithmetic.lean,Mathlib/SetTheory/Cardinal/Basic.lean 12 9 ['SnirBroshi', 'github-actions', 'ksenono', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot', 'vlad902'] nobody
98-69802
3 months ago
155-52458
155 days ago
0-136
2 minutes
35241 ooovi
author:ooovi
 chore(LinearAlgebra/AffineSpace): Redefine AffineSpace Definition of `AffineSpace` following that of `ConvexSpace`. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra
label:t-algebra$
 106/0 Mathlib.lean,Mathlib/LinearAlgebra/AffineSpace/Basic.lean 2 1 ['github-actions'] nobody
98-38967
3 months ago
unknown
0-0
0 seconds
34159 wangying11123
author:wangying11123
 feat(Geometry/Euclidean/Similarity): Add Triangle similarity on oangle Add theorems about triangles similarity on oangle t-euclidean-geometry new-contributor awaiting-author 154/1 Mathlib/Geometry/Euclidean/Similarity.lean 1 8 ['LLaurance', 'github-actions', 'jsm28', 'wangying11123'] jsm28
assignee:jsm28
98-33569
3 months ago
98-80798
98 days ago
7-49555
7 days
34799 vlad902
author:vlad902
 feat(SimpleGraph): the cycle graph and complete graph are Hamiltonian --- - [ ] depends on: #34797 - [ ] depends on: #35255 - [ ] depends on: #37930 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-combinatorics large-import blocked-by-other-PR merge-conflict 29/0 Mathlib/Combinatorics/SimpleGraph/Copy.lean,Mathlib/Combinatorics/SimpleGraph/Hamiltonian.lean 2 4 ['github-actions', 'mathlib-dependent-issues', 'mathlib-merge-conflicts'] nobody
98-27978
3 months ago
108-7646
108 days ago
0-551
9 minutes
35125 kim-em
author:kim-em
 chore: make OrderDual a structure This PR changes `OrderDual` from a type alias (`def OrderDual (α : Type*) := α`) to a one-field structure: ```lean structure OrderDual (α : Type*) where toDual :: ofDual : α ``` This prevents defeq abuse between `α` and `αᵒᵈ`, requiring explicit `toDual`/`ofDual` wrapping at type boundaries. 🤖 Prepared with Claude Code WIP large-import merge-conflict LLM-generated 10540/4872 Mathlib/Algebra/AddConstMap/Basic.lean,Mathlib/Algebra/Field/Basic.lean,Mathlib/Algebra/Group/Finsupp.lean,Mathlib/Algebra/Lie/Nilpotent.lean,Mathlib/Algebra/Lie/Submodule.lean,Mathlib/Algebra/Module/Submodule/Range.lean,Mathlib/Algebra/Module/Torsion/Basic.lean,Mathlib/Algebra/MonoidAlgebra/Degree.lean,Mathlib/Algebra/MvPolynomial/NoZeroDivisors.lean,Mathlib/Algebra/Order/Archimedean/Basic.lean,Mathlib/Algebra/Order/BigOperators/Group/Finset.lean,Mathlib/Algebra/Order/BigOperators/Group/List.lean,Mathlib/Algebra/Order/BigOperators/Group/Multiset.lean,Mathlib/Algebra/Order/Chebyshev.lean,Mathlib/Algebra/Order/Group/Action/Synonym.lean,Mathlib/Algebra/Order/Group/DenselyOrdered.lean,Mathlib/Algebra/Order/Group/Indicator.lean,Mathlib/Algebra/Order/Group/Lattice.lean,Mathlib/Algebra/Order/Group/MinMax.lean,Mathlib/Algebra/Order/Group/OrderIso.lean,Mathlib/Algebra/Order/Group/Pointwise/Bounds.lean,Mathlib/Algebra/Order/Group/Pointwise/CompleteLattice.lean,Mathlib/Algebra/Order/Group/Synonym.lean,Mathlib/Algebra/Order/GroupWithZero/Action/Synonym.lean,Mathlib/Algebra/Order/GroupWithZero/Canonical.lean,Mathlib/Algebra/Order/GroupWithZero/Synonym.lean,Mathlib/Algebra/Order/Hom/Monoid.lean,Mathlib/Algebra/Order/Module/Field.lean,Mathlib/Algebra/Order/Module/Pointwise.lean,Mathlib/Algebra/Order/Module/Synonym.lean,Mathlib/Algebra/Order/Monoid/Unbundled/OrderDual.lean,Mathlib/Algebra/Order/Rearrangement.lean,Mathlib/Algebra/Order/Ring/Cast.lean,Mathlib/Algebra/Order/Ring/Synonym.lean,Mathlib/Algebra/Order/Ring/WithTop.lean,Mathlib/Algebra/Order/UpperLower.lean,Mathlib/AlgebraicGeometry/AffineSpace.lean,Mathlib/AlgebraicGeometry/IdealSheaf/Basic.lean,Mathlib/AlgebraicGeometry/ProjectiveSpectrum/Topology.lean,Mathlib/AlgebraicTopology/SimplicialSet/AnodyneExtensions/Rank.lean,Mathlib/Analysis/Convex/Basic.lean,Mathlib/Analysis/Convex/Combination.lean,Mathlib/Analysis/Convex/Function.lean,Mathlib/Analysis/Convex/Jensen.lean,Mathlib/Analysis/Convex/Quasiconvex.lean,Mathlib/Analysis/Convex/Star.lean,Mathlib/Analysis/Convex/Topology.lean,Mathlib/Analysis/InnerProductSpace/Orthogonal.lean,Mathlib/Analysis/InnerProductSpace/Projection/Submodule.lean,Mathlib/Analysis/LocallyConvex/Polar.lean,Mathlib/Analysis/Normed/Group/Constructions.lean,Mathlib/Analysis/Normed/Order/Lattice.lean,Mathlib/CategoryTheory/Abelian/Subobject.lean,Mathlib/CategoryTheory/Localization/Bousfield.lean,Mathlib/CategoryTheory/MorphismProperty/LiftingProperty.lean,Mathlib/CategoryTheory/Subobject/ArtinianObject.lean,Mathlib/CategoryTheory/Subobject/Limits.lean,Mathlib/Combinatorics/Enumerative/IncidenceAlgebra.lean,Mathlib/Combinatorics/Pigeonhole.lean,Mathlib/Combinatorics/SetFamily/AhlswedeZhang.lean,Mathlib/Combinatorics/SimpleGraph/Hasse.lean,Mathlib/Data/DFinsupp/Lex.lean,Mathlib/Data/DFinsupp/WellFounded.lean,Mathlib/Data/ENNReal/Basic.lean,Mathlib/Data/ENNReal/Inv.lean,Mathlib/Data/EReal/Operations.lean,Mathlib/Data/Fin/Tuple/Basic.lean,Mathlib/Data/Finset/Lattice/Fold.lean,Mathlib/Data/Finset/Lattice/Pi.lean,Mathlib/Data/Finset/Lattice/Prod.lean,Mathlib/Data/Finset/Lattice/Union.lean,Mathlib/Data/Finset/Max.lean,Mathlib/Data/Finset/NAry.lean,Mathlib/Data/Finset/PiInduction.lean,Mathlib/Data/Finset/Sigma.lean,Mathlib/Data/Finsupp/Lex.lean,Mathlib/Data/Finsupp/WellFounded.lean,Mathlib/Data/Fintype/Card.lean,Mathlib/Data/Fintype/Defs.lean,Mathlib/Data/Fintype/Lattice.lean,Mathlib/Data/List/MinMax.lean,Mathlib/Data/Nat/Cast/Synonym.lean,Mathlib/Data/Nat/Lattice.lean,Mathlib/Data/Nat/Pairing.lean,Mathlib/Data/Ordmap/Invariants.lean,Mathlib/Data/Ordmap/Ordset.lean,Mathlib/Data/Real/Pointwise.lean,Mathlib/Data/Set/Finite/Lattice.lean,Mathlib/Data/Set/Finite/Lemmas.lean,Mathlib/Data/Set/Lattice.lean,Mathlib/Data/Set/Monotone.lean,Mathlib/Data/Set/Piecewise.lean,Mathlib/Data/Set/Sigma.lean,Mathlib/Data/Sum/Order.lean,Mathlib/FieldTheory/Galois/Basic.lean,Mathlib/FieldTheory/Galois/Infinite.lean,Mathlib/FieldTheory/Galois/IsGaloisGroup.lean,Mathlib/GroupTheory/ArchimedeanDensely.lean,Mathlib/GroupTheory/GroupAction/FixingSubgroup.lean,Mathlib/LinearAlgebra/AffineSpace/Ordered.lean 324 2 ['github-actions', 'mathlib-merge-conflicts'] nobody
98-22244
3 months ago
unknown
0-0
0 seconds
34702 pfaffelh
author:pfaffelh
 feat(Data/FinsetPowerset): The set `{v : List.Vector Bool n | v.val.count = k}` has cardinality `n.choose k` Show that `{v : List.Vector Bool n | v.val.count = k}` has cardinality `n.choose k`. The proof builds on `powersetCard k s` (the subsets of `s : Finset _` with cardinality `k`), and an equivalence to the above set. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) large-import t-data awaiting-author 52/1 Mathlib/Data/Finset/Powerset.lean,Mathlib/Data/Fintype/Pi.lean,Mathlib/Logic/Equiv/Fintype.lean 3 37 ['DavidLedvinka', 'Vierkantor', 'b-mehta', 'eric-wieser', 'github-actions', 'joneugster', 'pfaffelh'] Vierkantor
assignee:Vierkantor
97-75769
3 months ago
15-48282
15 days ago
93-37493
93 days
33050 mkaratarakis
author:mkaratarakis
 feat: lemmas for the analytic part of the proof of the Gelfond–Schneider theorem Lemmas missing for the formalisation of the proof of the Gelfond–Schneider theorem --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-number-theory new-contributor WIP 238/0 Mathlib.lean,Mathlib/Analysis/Analytic/Basic.lean,Mathlib/Analysis/Analytic/Order.lean,Mathlib/Analysis/Complex/CauchyIntegral.lean,Mathlib/NumberTheory/Transcendental/AnalyticPart.lean,Mathlib/NumberTheory/Transcendental/AnalyticPart2.lean 6 113 ['SnirBroshi', 'github-actions', 'j-loreaux', 'mkaratarakis', 'riccardobrasca', 'vihdzp'] riccardobrasca
assignee:riccardobrasca
97-15949
3 months ago
107-35206
107 days ago
6-26337
6 days
34814 GrigorenkoPV
author:GrigorenkoPV
 feat(Tactic/ClearUnneeded): add `clear_unneeded` tactic --- The simplest version suggested in https://github.com/leanprover-community/mathlib4/issues/25319 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-meta new-contributor please-merge-master awaiting-author 94/0 Mathlib.lean,Mathlib/Tactic.lean,Mathlib/Tactic/ClearUnneeded.lean,Mathlib/Tactic/Common.lean,MathlibTest/ClearUnneeded.lean,scripts/noshake.json 6 12 ['BoltonBailey', 'GrigorenkoPV', 'github-actions', 'joneugster'] joneugster
assignee:joneugster
97-3013
3 months ago
105-26386
105 days ago
2-23785
2 days
34876 GrigorenkoPV
author:GrigorenkoPV
 feat(Tactic/AssumptionQuestion): add `assumption?` tactic --- As requested in #10361 TODO: maybe add some tests? [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-meta new-contributor awaiting-author 85/0 Mathlib.lean,Mathlib/Tactic.lean,Mathlib/Tactic/AssumptionQuestion.lean,Mathlib/Tactic/Common.lean,MathlibTest/AssumptionQuestion.lean,scripts/noshake.json 6 5 ['GrigorenkoPV', 'SnirBroshi', 'github-actions', 'joneugster'] joneugster
assignee:joneugster
97-1588
3 months ago
105-24576
105 days ago
0-83167
23 hours
31386 harahu
author:harahu
 doc: demote repeated H1 headers to H2 --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict 220/4 Archive/Imo/Imo2002Q3.lean,Archive/Imo/Imo2010Q5.lean,Mathlib/Geometry/Manifold/VectorBundle/LocalFrame.lean,Mathlib/Probability/Distributions/Gaussian/HasGaussianLaw/Basic.lean,Mathlib/RingTheory/LocalProperties/Injective.lean,Mathlib/RingTheory/LocalProperties/ProjectiveDimension.lean,Mathlib/RingTheory/QuasiFinite/Weakly.lean,Mathlib/Tactic/Common.lean,Mathlib/Tactic/Linter/EmptyLine.lean,MathlibTest/DirectoryDependencyLinter/Test.lean,MathlibTest/Header.lean,scripts/demote_docstring_headers.py,scripts/find_docstring_headers.py 6 7 ['github-actions', 'mathlib-merge-conflicts', 'mathlib4-merge-conflict-bot'] nobody
97-420
3 months ago
unknown
0-0
0 seconds
33217 Blackfeather007
author:Blackfeather007
 feat(Algebra): define associated graded structure for abelian group In this PR we define the associated graded structure for abelian group when given a filtration and only give some basic lemmas about it. --- migrated from https://github.com/leanprover-community/mathlib4/pull/26857 new-contributor t-ring-theory awaiting-author 144/0 Mathlib.lean,Mathlib/RingTheory/FilteredAlgebra/AssociatedGraded.lean 2 13 ['Blackfeather007', 'chrisflav', 'erdOne', 'eric-wieser', 'github-actions', 'urkud'] erdOne
assignee:erdOne
96-75569
3 months ago
146-3565
146 days ago
4-58698
4 days
33020 FormulaRabbit81
author:FormulaRabbit81
 chore(Topology): Deprecate file --- - [x] depends on: #30851 deprecation [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-topology large-import merge-conflict 82/49 Mathlib/Topology/Compactness/HilbertCubeEmbedding.lean,Mathlib/Topology/MetricSpace/HausdorffAlexandroff.lean,Mathlib/Topology/MetricSpace/PiNat.lean 3 3 ['github-actions', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
96-75462
3 months ago
155-62851
155 days ago
0-14835
4 hours
23791 SEU-Prime
author:SEU-Prime
 Create AmiceTrans.lean --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict WIP t-number-theory new-contributor 2963/0 Mathlib.lean,Mathlib/Analysis/Normed/Ring/Lemmas2.lean,Mathlib/NumberTheory/Padics/AmiceTrans.lean,Mathlib/NumberTheory/Padics/PSAC.lean,Mathlib/NumberTheory/Padics/PSAC2.lean,Mathlib/NumberTheory/Padics/PSAC3.lean,Mathlib/NumberTheory/Padics/PiGammainPS.lean,Mathlib/NumberTheory/Padics/PsiandVar.lean,Mathlib/RingTheory/AdicCompletion/Lemma.lean,Mathlib/RingTheory/PowerSeries/Comp.lean,Mathlib/Topology/ContinuousMap/ZeroAtBot.lean 11 5 ['SEU-Prime', 'github-actions', 'leanprover-community-bot-assistant', 'urkud'] nobody
96-74633
3 months ago
410-20899
410 days ago
0-38
38 seconds
20967 joneugster
author:joneugster
 tracking(CategoryTheory/Enriched/Limits): add conical limits Tracking PR for adding conical limits Co-authored-by: Emily Riehl Co-authored-by: Dagur Asgeirsson --- - [x] depends on: #20904 - [x] depends on: #20907 - [x] depends on: #20959 - [x] depends on: #20963 - [x] depends on: #20964 - [x] depends on: #20965 - content source: emilyriehl/infinity-cosmos#78 New implementation (not reflected on this branch yet): - [x] depends on: #22917 - [x] depends on: #22921 - [ ] depends on: #22923 - [ ] depends on: #22924 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict WIP t-category-theory infinity-cosmos please-adopt 619/1 Mathlib.lean,Mathlib/CategoryTheory/Enriched/Limits/HasConicalLimits.lean,Mathlib/CategoryTheory/Enriched/Limits/HasConicalProducts.lean,Mathlib/CategoryTheory/Enriched/Limits/HasConicalPullbacks.lean,Mathlib/CategoryTheory/Enriched/Limits/HasConicalTerminal.lean,Mathlib/CategoryTheory/Enriched/Limits/IsConicalLimit.lean,Mathlib/CategoryTheory/Enriched/Limits/IsConicalTerminal.lean,Mathlib/CategoryTheory/Enriched/Ordinary/Basic.lean 8 2 ['github-actions', 'mathlib4-dependent-issues-bot'] nobody
96-67541
3 months ago
unknown
0-0
0 seconds
23042 joneugster
author:joneugster
 feat(CategoryTheory/Enriched/Limits): add HasConicalLimitsOfSize.shrink --- Note: I've marked this "WIP" because I'm not yet sure when this will be needed and I'd probably put the PR on the queue once I've created some follow-up needing it. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) WIP t-category-theory infinity-cosmos please-adopt 22/1 Mathlib/CategoryTheory/Enriched/Limits/HasConicalLimits.lean 1 1 ['github-actions'] nobody
96-67540
3 months ago
430-44040
430 days ago
0-1
1 second
23142 joneugster
author:joneugster
 feat(CategoryTheory/Enriched/Limits): add API for HasConicalLimit --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) awaiting-author t-category-theory infinity-cosmos please-adopt 52/9 Mathlib/CategoryTheory/Enriched/Limits/HasConicalLimits.lean 1 2 ['github-actions', 'joelriou'] nobody
96-67540
3 months ago
427-47031
427 days ago
0-67788
18 hours
23145 joneugster
author:joneugster
 feat(CategoryTheory/Enriched/Limits): add IsConicalLimits --- - [ ] depends on: #23142 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict blocked-by-other-PR t-category-theory infinity-cosmos please-adopt 221/9 Mathlib.lean,Mathlib/CategoryTheory/Enriched/Limits/HasConicalLimits.lean,Mathlib/CategoryTheory/Enriched/Limits/IsConicalLimit.lean 3 3 ['github-actions', 'joelriou', 'mathlib4-dependent-issues-bot'] nobody
96-67539
3 months ago
428-28141
428 days ago
0-370
6 minutes
20401 RemyDegenne
author:RemyDegenne
 feat: add sigmaFinite_iUnion ```lean lemma sigmaFinite_iUnion (μ : Measure α) {s : ℕ → Set α} (h_meas : MeasurableSet (⋃ n, s n)) [∀ n, SigmaFinite (μ.restrict (s n))] : SigmaFinite (μ.restrict (⋃ n, s n)) ``` --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict awaiting-author t-measure-probability 37/28 Mathlib/MeasureTheory/Decomposition/Exhaustion.lean,Mathlib/MeasureTheory/Measure/Typeclasses.lean 2 6 ['RemyDegenne', 'github-actions', 'sgouezel', 'urkud'] nobody
96-50611
3 months ago
504-38127
504 days ago
0-73190
20 hours
33281 michelsol
author:michelsol
 feat(Analysis/SpecialFunctions/Integrals): integral of 1/sqrt(1-x^2) and its integrability. Add the integral of the derivative of arcsin and its integrability. --- - [ ] depends on: #33280 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor merge-conflict t-analysis 59/0 Mathlib/Analysis/SpecialFunctions/Integrability/Basic.lean,Mathlib/Analysis/SpecialFunctions/Integrals/Basic.lean,Mathlib/MeasureTheory/Integral/IntervalIntegral/FundThmCalculus.lean 3 3 ['github-actions', 'mathlib-dependent-issues', 'mathlib4-merge-conflict-bot'] nobody
96-44256
3 months ago
148-12081
148 days ago
0-2872
47 minutes
35339 grunweg
author:grunweg
 feat: "confusing variables" linter Continuation of #15400. This linter flags variable commands which both update an existing binder annotation and declare new variables: these can yield confusing or misleading error messages (see https://github.com/leanprover/lean4/issues/2789). Instead, these should be split in several variable statements. ------------ Help fixing these errors is welcome! Currently, the linter only catches some cases, when the updated binder is from a previous scope. To make it catch all cases, the linter could insert a section before the variable command and use that scope instead. See [zulip](https://leanprover.zulipchat.com/#narrow/stream/113488-general/topic/Get.20scope.20*before*.20some.20syntax.20is.20evaluated) [discussions](https://leanprover.zulipchat.com/#narrow/stream/113488-general/topic/Determining.20variable.20binders.20from.20syntax). --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) please-adopt merge-conflict awaiting-CI t-linter 220/9 Cache/Requests.lean,Mathlib/FieldTheory/AbelRuffini.lean,Mathlib/FieldTheory/IntermediateField/Basic.lean,Mathlib/FieldTheory/KummerExtension.lean,Mathlib/LinearAlgebra/CliffordAlgebra/Basic.lean,Mathlib/Tactic/Linter/Lint.lean,Mathlib/Tactic/Linter/Style.lean,MathlibTest/LintStyle.lean 8 0 [] nobody
96-37910
3 months ago
96-37978
96 days ago
0-12
12 seconds
35342 grunweg
author:grunweg
 feat: add Diffeomorph.sumSumSumComm This matches `{Equiv,Homeomorph.sumSumSumComm}`, and is needed to prove that addition in the cobordism group is commutative. From my bordism theory project. ---------- Migrated and rebased version of #22784. The current proof is not complete yet, and feels very painful. Medium-term, the best way forward might be to make fun_prop support manifolds. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) WIP t-differential-geometry 50/0 Mathlib/Geometry/Manifold/Diffeomorph.lean 1 1 ['github-actions'] nobody
96-36054
3 months ago
96-36125
96 days ago
0-1
1 second
11500 mcdoll
author:mcdoll
 refactor(Topology/Algebra/Module/WeakDual): Clean up - Move `Dual` and `dualPairing` lower in the import-hierachy - deduplicate `dualPairing` - Bundle continuity statements to `CLM`s. - Make `WeakDual` and `WeakSpace` reducible - Remove `refine'` in favor of `refine` --- Cleaning up `Analysis/NormedSpace/WeakDual` will be done in a second PR [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict awaiting-author t-topology 227/179 Mathlib.lean,Mathlib/Analysis/Fourier/RiemannLebesgueLemma.lean,Mathlib/Analysis/InnerProductSpace/Adjoint.lean,Mathlib/Analysis/InnerProductSpace/Dual.lean,Mathlib/Analysis/LocallyConvex/Polar.lean,Mathlib/Analysis/NormedSpace/Dual.lean,Mathlib/Analysis/NormedSpace/WeakDual.lean,Mathlib/Analysis/VonNeumannAlgebra/Basic.lean,Mathlib/MeasureTheory/Function/AEEqOfIntegral.lean,Mathlib/MeasureTheory/Measure/FiniteMeasure.lean,Mathlib/Topology/Algebra/Module/CharacterSpace.lean,Mathlib/Topology/Algebra/Module/Dual.lean,Mathlib/Topology/Algebra/Module/WeakDual.lean,docs/overview.yaml,docs/undergrad.yaml 15 16 ['ADedecker', 'grunweg', 'j-loreaux', 'kkytola', 'mathlib-bors', 'mcdoll', 'urkud'] nobody
96-27998
3 months ago
745-27198
745 days ago
46-5571
46 days
20428 madvorak
author:madvorak
 feat(Data/Sign): lemmas about `∈ Set.range SignType.cast` --- Perhaps `in_set_range_singType_cast_iff_abs` needs to be moved somewhere downstream. merge-conflict WIP t-data 40/0 Mathlib/Data/Sign.lean 1 13 ['eric-wieser', 'github-actions', 'leanprover-community-bot-assistant', 'madvorak', 'urkud'] nobody
96-27826
3 months ago
unknown
0-0
0 seconds
29281 plp127
author:plp127
 doc: `Fin.natAdd_castLEEmb` Change the docstring of `Fin.natAdd_castLEEmb` which confused me when I read it so I rewrote it. PS. this doesn't really follow the naming convention since data should be in `camelCase` --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-data awaiting-author 2/3 Mathlib/Data/Fin/Embedding.lean 1 3 ['github-actions', 'mathlib4-merge-conflict-bot', 'urkud'] nobody
96-24447
3 months ago
243-32915
243 days ago
18-38918
18 days
34165 zcyemi
author:zcyemi
 feat(Archive/Imo/Imo2012Q5): IMO 2012 Q5 --- Add IMO 2012 Q5 - [ ] depends on: #34157 - [ ] depends on: #34156 - [ ] depends on: #34155 - [ ] depends on: #33852 - [ ] depends on: #33479 - [ ] depends on: #31500 blocked-by-other-PR large-import IMO merge-conflict 965/12 Archive.lean,Archive/Imo/Imo2012Q5.lean,Mathlib/Analysis/Convex/Between.lean,Mathlib/Geometry/Euclidean/Altitude.lean,Mathlib/Geometry/Euclidean/Sphere/Basic.lean,Mathlib/Geometry/Euclidean/Sphere/Power.lean,Mathlib/Geometry/Euclidean/Triangle.lean,Mathlib/LinearAlgebra/AffineSpace/Independent.lean 8 3 ['github-actions', 'mathlib-merge-conflicts', 'mathlib4-dependent-issues-bot'] nobody
96-21410
3 months ago
122-51074
122 days ago
0-1530
25 minutes
27936 alreadydone
author:alreadydone
 feat(Algebra): additivize Dvd and Prime `Prime` can't be directly additivized, so we introduce `Prime₀`, which drops the `≠ 0` condition, and additivize it to `AddPrime`. To show that `Prime₀` is a reasonable definition, we show its connection to `Irreducible` under `IsPrimal` and `IsRegular` conditions. We also show that an element in a product monoid is `Prime₀` iff one component is a unit and the other is `Prime₀`, and the same with `Prime₀` replaced by `Irreducible`. Also additivize `IsPrimal`, `IsRelPrime` and `DecompositionMonoid`. The motivation is that the primality of `single g 1` in `AddMonoidAlgebra k G` is connected to the primality of `g` in `G`. --- I've checked [all 29 files](https://github.com/search?q=repo%3Aleanprover-community%2Fmathlib4%20%E2%88%A3%20to_additive&type=code) containing the `∣` symbol and the `to_additive` attribute and fixed the wrongly translated (`dvd` to `addDvd`) names. TODO: connect (Add)Dvd to [ExistsMul/AddOfLE](https://leanprover-community.github.io/mathlib4_docs/Mathlib/Algebra/Order/Monoid/Unbundled/ExistsOfLE.html#ExistsMulOfLE) [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra awaiting-author merge-conflict
label:t-algebra$
 398/185 Mathlib.lean,Mathlib/Algebra/BigOperators/Group/Finset/Basic.lean,Mathlib/Algebra/BigOperators/Group/Finset/Defs.lean,Mathlib/Algebra/BigOperators/Group/Finset/Piecewise.lean,Mathlib/Algebra/BigOperators/Group/List/Lemmas.lean,Mathlib/Algebra/BigOperators/Group/Multiset/Basic.lean,Mathlib/Algebra/Divisibility/Basic.lean,Mathlib/Algebra/Divisibility/Finite.lean,Mathlib/Algebra/Divisibility/Hom.lean,Mathlib/Algebra/Divisibility/Prod.lean,Mathlib/Algebra/Divisibility/Units.lean,Mathlib/Algebra/Group/Action/Pointwise/Finset.lean,Mathlib/Algebra/Group/Prod.lean,Mathlib/Algebra/GroupWithZero/Associated.lean,Mathlib/Algebra/Notation/Defs.lean,Mathlib/Algebra/Prime/Defs.lean,Mathlib/Algebra/Prime/Lemmas.lean,Mathlib/Algebra/Prime/Prod.lean,Mathlib/Data/Nat/Prime/Defs.lean,Mathlib/Dynamics/PeriodicPts/Defs.lean,Mathlib/GroupTheory/Coset/Card.lean,Mathlib/GroupTheory/Exponent.lean,Mathlib/GroupTheory/GroupAction/Blocks.lean,Mathlib/GroupTheory/GroupAction/Period.lean,Mathlib/GroupTheory/Index.lean,Mathlib/GroupTheory/OrderOfElement.lean,Mathlib/GroupTheory/Perm/Cycle/Type.lean,Mathlib/GroupTheory/Schreier.lean,Mathlib/GroupTheory/SpecificGroups/Cyclic.lean,Mathlib/Tactic/Translate/ToAdditive.lean 30 38 ['JovanGerb', 'YaelDillies', 'adomani', 'alreadydone', 'bryangingechen', 'github-actions', 'jcommelin', 'kbuzzard', 'leanprover-radar', 'mathlib-merge-conflicts', 'mathlib4-merge-conflict-bot'] bryangingechen
assignee:bryangingechen
96-21157
3 months ago
120-27017
120 days ago
107-17045
107 days
34156 zcyemi
author:zcyemi
 feat(Analysis/Convex/Between): add lemmas on convex combination of mem simplex interior --- I add three lemmas of convex combinations preserving membership in the interior of a simplex. And also open a zulip thread [#mathlib4 > Best place for convex combination and simplex interior](https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/Best.20place.20for.20convex.20combination.20and.20simplex.20interior/with/568558406) deps: - [ ] depends on: #33852 t-analysis merge-conflict 170/0 Mathlib/Analysis/Convex/Between.lean,Mathlib/LinearAlgebra/AffineSpace/Independent.lean 2 3 ['github-actions', 'mathlib-dependent-issues', 'mathlib-merge-conflicts'] nobody
96-20173
3 months ago
96-20173
96 days ago
0-3761
1 hour
34503 alreadydone
author:alreadydone
 chore(RingTheory/Localization): generalize FractionRing to semirings + Introduce `Submonoid.regulars`, the submonoid of regular elements in a monoid. + Replace `nonZeroDivisors` by `regulars` in the definition of (Is)FractionRing, generalizing from CommRing to CommSemiring. Finishes most of the remaining parts of issue #22997. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-ring-theory t-algebra awaiting-CI WIP merge-conflict
label:t-algebra$
 330/188 Mathlib/Algebra/Field/Basic.lean,Mathlib/Algebra/Group/Hom/Basic.lean,Mathlib/Algebra/Group/Submonoid/Basic.lean,Mathlib/Algebra/Group/Submonoid/Defs.lean,Mathlib/Algebra/Group/Submonoid/Operations.lean,Mathlib/Algebra/GroupWithZero/NonZeroDivisors.lean,Mathlib/Algebra/Ring/NonZeroDivisors.lean,Mathlib/GroupTheory/MonoidLocalization/Basic.lean,Mathlib/GroupTheory/MonoidLocalization/MonoidWithZero.lean,Mathlib/RingTheory/LocalRing/Basic.lean,Mathlib/RingTheory/Localization/Basic.lean,Mathlib/RingTheory/Localization/Defs.lean,Mathlib/RingTheory/Localization/FractionRing.lean 13 2 ['github-actions', 'mathlib-merge-conflicts'] nobody
96-20048
3 months ago
unknown
0-0
0 seconds
35134 fpvandoorn
author:fpvandoorn
 feat(translate): print constant names with hover info Part of #34846. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-meta awaiting-author merge-conflict 46/28 Mathlib/Tactic/Translate/Core.lean,MathlibTest/toAdditive.lean 2 6 ['JovanGerb', 'github-actions', 'mathlib-merge-conflicts'] JovanGerb
assignee:JovanGerb
96-19918
3 months ago
98-12374
98 days ago
2-13760
2 days
29777 yuanyi-350
author:yuanyi-350
 feat(Functional Analysis): closed Range Theorem - [ ] depends on: #29151 [Corollary of Hahn-Banach theorem] - [ ] depends on: #29776 [refactor ContinuousLinearMap.isOpenMap by separating it into sublemmas] --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) WIP blocked-by-other-PR new-contributor awaiting-author t-analysis merge-conflict 237/25 Mathlib/Analysis/LocallyConvex/Separation.lean,Mathlib/Analysis/Normed/Operator/Banach.lean,Mathlib/Analysis/Normed/Operator/ClosedRange.lean,Mathlib/Analysis/RCLike/Lemmas.lean,Mathlib/Topology/Order/OrderClosed.lean 5 5 ['github-actions', 'mathlib-merge-conflicts', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] faenuccio
assignee:faenuccio
96-13441
3 months ago
246-25217
246 days ago
0-634
10 minutes
29151 yuanyi-350
author:yuanyi-350
 feat: Corollary of Hahn–Banach theorem In this PR, I have proved [Rudin, *Functional Analysis* (Theorem 3.7)][rudin1991] which is a step in proving the Closed Range Theorem. Also, I have added tags for the corresponding theorems in Rudin to mathlib. 3.7 Theorem. Suppose B is a convex, balanced, closed set in a locally convex space $X, x_0 \in X$, but $x_0 \notin B$. Then there exists $\Lambda \in X^*$ such that $|\Lambda x| \leq 1$ for all $x \in B$, but $\Lambda x_0>1$ proof. Since $B$ is closed and convex, we can apply (b) of Theorem 3.4, with $A=\{ x_0 \}$ , to obtain $\Lambda_1 \in X^*$ such that $\Lambda_1 x_0=r e^{i \theta}$ lies outside the closure $K$ of $\Lambda_1(B)$. Since $B$ is balanced, so is $K$. Hence there exists $s, 0 List.Vector.* - ... Deletions: - Nat.bit1_add_bit1 - ... Any other comments you want to keep out of the PR commit should go below the `---`, and placed outside this HTML comment, or else they will be invisible to reviewers. If this PR depends on other PRs, please list them below this comment, using the following format: - [ ] depends on: #xyz [optional extra text] --> [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) awaiting-author new-contributor large-import t-analysis merge-conflict 70/1 Mathlib/Analysis/LocallyConvex/Separation.lean,Mathlib/Analysis/RCLike/Lemmas.lean,Mathlib/Topology/Order/OrderClosed.lean 3 17 ['faenuccio', 'fpvandoorn', 'github-actions', 'mathlib-merge-conflicts', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot', 'mcdoll', 'themathqueen', 'yuanyi-350'] faenuccio
assignee:faenuccio
96-9064
3 months ago
243-42892
243 days ago
20-68757
20 days
35341 grunweg
author:grunweg
 feat: lint against the tactic.skipAssignedInstances option in mathlib This means we can remove the corresponding technical debt entry. Re-created version of #20872. --- [This comment](https://github.com/leanprover-community/mathlib4/pull/20872#issuecomment-2602743770) might still be relevant: does this linter need adaptations to recursively parse the outer `set_option`s? Wasn't there code written semi-recently which did this? [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) please-adopt t-linter merge-conflict 54/3 Mathlib/Tactic/Linter/Style.lean,MathlibTest/LintStyle.lean 2 3 ['github-actions', 'mathlib-merge-conflicts'] nobody
96-7709
3 months ago
96-36345
96 days ago
0-118
1 minute
35344 grunweg
author:grunweg
 feat: lint upon uses of the mono tactic suggesting to use `gcongr` instead. In general, `mono` is unmaintained, was only partially ported --- and gcongr at this point is more featureful, actively developed and has a nicer user interface. The topic was also discussed [on zulip](https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/Porting.20note.3A.20Fixing.20up.20.60mono.60/with/445125798). --- TODO: update the linter wording, fix its implementation and wait until tests pass Rebased and migrated version of #25700. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) please-adopt t-linter RFC 4/0 MathlibTest/DeprecatedSyntaxLinter.lean,MathlibTest/Monotonicity.lean 2 2 ['github-actions', 'grunweg'] nobody
96-7329
3 months ago
96-34445
96 days ago
0-13
13 seconds
29965 RemyDegenne
author:RemyDegenne
 feat(probability): define subtraction of kernels This PR defines subtraction of kernels and uses it to prove `MeasurableSet {a | κ a = η a}` for two finite kernels `κ, η`. From the LeanBandits project. --- - [x] depends on: #35018 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) WIP t-measure-probability large-import 165/2 Mathlib.lean,Mathlib/MeasureTheory/Measure/SubFinite.lean,Mathlib/Probability/Kernel/Defs.lean,Mathlib/Probability/Kernel/RadonNikodym.lean,Mathlib/Probability/Kernel/Sub.lean 5 3 ['github-actions', 'mathlib-dependent-issues', 'mathlib4-merge-conflict-bot'] nobody
96-4715
3 months ago
239-47200
239 days ago
0-1
1 second
32534 erdOne
author:erdOne
 feat(AlgebraicGeometry): Zariski's main theorem --- - [x] depends on: #34274 - [x] depends on: #34017 - [ ] depends on: #34222 - [ ] depends on: #34269 - [ ] depends on: #33903 - [ ] depends on: #33803 - [ ] depends on: #33555 - [x] depends on: #33805 - [x] depends on: #33722 - [x] depends on: #33718 - [x] depends on: #32811 - [x] depends on: #32803 - [x] depends on: #33469 - [x] depends on: #33553 - [x] depends on: #32530 - [x] depends on: #32528 - [x] depends on: #32429 - [x] depends on: #32375 - [x] depends on: #30885 - [x] depends on: #32536 - [x] depends on: #32537 - [x] depends on: #32595 - [x] depends on: #32596 - [x] depends on: #32813 - [x] depends on: #32809 - [x] depends on: #32802 - [x] depends on: #33468 - [x] depends on: #32665 - [x] depends on: #32823 - [x] depends on: #32806 - [x] depends on: #32837 - [x] depends on: #33537 - [x] depends on: #33476 - [x] depends on: #33556 - [x] depends on: #33536 - [x] depends on: #33472 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) WIP t-ring-theory 4808/0 Mathlib.lean,Mathlib/CFT/ActualStuff.lean,Mathlib/CFT/Etale.lean,Mathlib/CFT/EtaleLocalization.lean,Mathlib/CFT/Flat.lean,Mathlib/CFT/IntegralClosure.lean,Mathlib/CFT/IsStandardEtale.lean,Mathlib/CFT/Junk.lean,Mathlib/CFT/NewNo.lean,Mathlib/CFT/No.lean,Mathlib/CFT/Nonsense.lean,Mathlib/CFT/Normalization.lean,Mathlib/CFT/Prestuff.lean,Mathlib/CFT/SeparableResidueStruct.lean,Mathlib/CFT/Smooth.lean,Mathlib/CFT/SmoothFibers.lean,Mathlib/CFT/Stuff.lean,Mathlib/CFT/Stuff2.lean,Mathlib/CFT/ZariskiMain.lean,Mathlib/RingTheory/ZariskiMain.lean 20 5 ['github-actions', 'mathlib-dependent-issues', 'mathlib-merge-conflicts', 'mathlib4-merge-conflict-bot'] nobody
95-38345
3 months ago
166-34925
166 days ago
0-101
1 minute
32918 michelsol
author:michelsol
 feat: define `supEdist` and `supDist` Create a new file Topology.MetricSpace.SupDistance and define the supremal distance in (extended) metric spaces. The defined `supEdist` and `supDist` will have similar theory to the already existing `infEdist` and `infDist`. The motivation is to be able to define the radius of a minimal bounding sphere as the infimum of the supDist later. [zulip discussion here](https://leanprover.zulipchat.com/#narrow/channel/116395-maths/topic/Formalizing.20Jung's.20theorem.20and.20minimal.20bounding.20spheres) t-topology new-contributor merge-conflict 75/0 Mathlib.lean,Mathlib/Topology/MetricSpace/SupDistance.lean 2 5 ['github-actions', 'mathlib4-merge-conflict-bot', 'michelsol', 'urkud'] nobody
95-14355
3 months ago
137-6740
137 days ago
21-3598
21 days
34909 SnirBroshi
author:SnirBroshi
 feat(Data/Sym/Sym2): `fromRel` equivalence with `Sigma` over a `Quotient` Add a non-dependent recursor on members of a `fromRel` set, and the following `Equiv`s: - The `fromRel` set of a symmetric relation `r` is equivalent to summing that set restricted to fibers of `f`. - For a relation homomorphism `r →r r'` where `r` is symmetric, the `fromRel` set of `r` is equivalent to summing that set restricted to equivalence classes of `r'` using a `Subtype`. --- I find this recursor pretty useful when dealing with `fromRel`, the idea came from a suggestion by @kmill [on Zulip](https://leanprover.zulipchat.com/#narrow/channel/217875-Is-there-code-for-X.3F/topic/Eq.2Erec.20with.20a.20constant.20does.20nothing.3A.20h.20.E2.96.B8.20c.20.3D.20c/near/565176948) for another `Sym2` conundrum. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-data delegated 43/0 Mathlib/Combinatorics/SimpleGraph/Bipartite.lean,Mathlib/Data/Sym/Sym2.lean 1 15 ['SnirBroshi', 'chrisflav', 'eric-wieser', 'github-actions', 'mathlib-bors', 'mathlib-merge-conflicts'] eric-wieser
assignee:eric-wieser
95-9171
3 months ago
22-56494
22 days ago
82-35003
82 days
29145 JovanGerb
author:JovanGerb
 chore: use `to_additive` in more places This PR addresses some comments about `to_additive` not working, by making it work more. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) awaiting-CI t-meta merge-conflict 61/177 Mathlib/Algebra/Group/End.lean,Mathlib/Algebra/Order/BigOperators/Group/LocallyFinite.lean,Mathlib/Combinatorics/Additive/DoublingConst.lean,Mathlib/Data/ZMod/Aut.lean,Mathlib/Topology/Algebra/InfiniteSum/Module.lean 5 4 ['JovanGerb', 'github-actions', 'mathlib-merge-conflicts'] nobody
95-8252
3 months ago
264-84323
264 days ago
0-26083
7 hours
34024 adomani
author:adomani
 feat: the global syntax linter The `globalSyntax` linter emits a warning on pairs of consecutive commands with no overall effect. For instance, the linter would flag ```lean4 namespace X end X ``` and similarly for consecutive pairs of `open` or `section` and `end`. --- - [ ] depends on: #34019, with just the linter implementation - [x] depends on: #34021, with linter-driven corrections - [x] depends on: #34051, with linter-driven corrections [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) large-import blocked-by-other-PR t-linter merge-conflict 219/15 Archive/Imo/Imo2024Q3.lean,Mathlib.lean,Mathlib/Data/ENNReal/Basic.lean,Mathlib/Init.lean,Mathlib/Tactic.lean,Mathlib/Tactic/Linter/GlobalSyntax.lean,MathlibTest/FindSyntax.lean,MathlibTest/Tauto.lean,MathlibTest/sqrt.lean 9 13 ['Ruben-VandeVelde', 'adomani', 'github-actions', 'grunweg', 'leanprover-radar', 'mathlib-merge-conflicts', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
95-7379
3 months ago
126-72426
126 days ago
0-1774
29 minutes
34926 mattrobball
author:mattrobball
 test Testing --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict 1/1 lean-toolchain 1 9 ['github-actions', 'kbuzzard', 'leanprover-radar', 'mathlib-merge-conflicts', 'mattrobball'] nobody
95-7129
3 months ago
unknown
0-0
0 seconds
16553 grunweg
author:grunweg
 WIP: tinkering with orientable manifolds - wait for #33307 to get merged - PR the "normed space" part separately - WIP: a linear isomorphism on a connected set is either orientation-preserving or orientation-preserving: some form of this was merged into mathlib recently; TODO update this PR accordingly! - [ ] depends on: #33307 - [x] depends on: #8738 --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict WIP t-differential-geometry blocked-by-other-PR 287/0 Mathlib.lean,Mathlib/Geometry/Manifold/Instances/Sphere.lean,Mathlib/Geometry/Manifold/Orientable.lean 3 3 ['github-actions', 'mathlib-dependent-issues', 'mathlib4-merge-conflict-bot'] nobody
94-82693
3 months ago
unknown
0-0
0 seconds
27500 Komyyy
author:Komyyy
 feat: the Riemann zeta function is meromorphic Also proves that the Hurwitz zeta function is meromorphic. This PR is split from #27499 to leave a good git diff history. --- The `large-import` change occurs only in the new module, so it poses no problem. - [x] depends on: #27499 - [x] depends on: #29817 This PR continues the work from #25597. Original PR: https://github.com/leanprover-community/mathlib4/pull/25597 WIP t-analysis large-import merge-conflict 87/3 Mathlib/Analysis/Meromorphic/Basic.lean,Mathlib/Analysis/Meromorphic/Complex.lean,Mathlib/Analysis/SpecialFunctions/Gamma/Deligne.lean,Mathlib/NumberTheory/LSeries/AbstractFuncEq.lean,Mathlib/NumberTheory/LSeries/HurwitzZeta.lean,Mathlib/NumberTheory/LSeries/HurwitzZetaEven.lean,Mathlib/NumberTheory/LSeries/HurwitzZetaOdd.lean,Mathlib/NumberTheory/LSeries/RiemannZeta.lean 3 21 ['Komyyy', 'github-actions', 'j-loreaux', 'loefflerd', 'mathlib-merge-conflicts', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] j-loreaux
assignee:j-loreaux
94-56486
3 months ago
269-5382
269 days ago
30-62878
30 days
26413 michaellee94
author:michaellee94
 feat: existence of maximal solutions for ODEs meeting Picard-Lindelöf conditions Add existence proof for maximal solution of ODE using Picard-Lindelöf and a uniqueness theorem using Grönwall's lemma. --- - [x] depends on: #26382 - [x] depends on: #29186 - [ ] depends on: #35043 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) blocked-by-other-PR new-contributor t-analysis merge-conflict 1300/431 Mathlib.lean,Mathlib/Analysis/ODE/Basic.lean,Mathlib/Analysis/ODE/ExistUnique.lean,Mathlib/Analysis/ODE/Gronwall.lean,Mathlib/Analysis/ODE/MaximalSolution.lean,Mathlib/Analysis/ODE/PicardLindelof.lean,Mathlib/Analysis/ODE/Transform.lean,Mathlib/Geometry/Manifold/IntegralCurve/Basic.lean,Mathlib/Geometry/Manifold/IntegralCurve/ExistUnique.lean,Mathlib/Geometry/Manifold/IntegralCurve/Transform.lean,Mathlib/Geometry/Manifold/IntegralCurve/UniformTime.lean,docs/1000.yaml,docs/undergrad.yaml 13 95 ['botbaki-review', 'github-actions', 'grunweg', 'leanprover-community-bot-assistant', 'mathlib-merge-conflicts', 'mathlib4-dependent-issues-bot', 'michaellee94', 'winstonyin'] nobody
94-41890
3 months ago
326-27676
326 days ago
0-5139
1 hour
33712 wangying11123
author:wangying11123
 feat(Geometry/Euclidean/Angle/Unoriented/Projection): Add sameray_orthogonalProjection_vsub_of_angle_lt Add sameray_orthogonalProjection_vsub_of_angle_lt `sameray_orthogonalProjection_vsub_of_angle_lt` When an angle is acute, the vector to the orthogonal projection lies in the same ray as the given direction vector. new-contributor t-euclidean-geometry awaiting-author 20/0 Mathlib/Geometry/Euclidean/Angle/Unoriented/Projection.lean 1 4 ['JovanGerb', 'github-actions', 'j-loreaux'] JovanGerb
assignee:JovanGerb
94-24186
3 months ago
94-24286
94 days ago
39-6778
39 days
30667 FrederickPu
author:FrederickPu
 feat(‎Mathlib/Algebra/Group/Subgroup/Pointwise): subgroup mul Title: feat: pointwise products for subgroups Description: showed the point-wise product of disjoint subgroups is equivalent to their Cartesian product. Based on https://leanprover.zulipchat.com/#narrow/channel/113488-general/topic/useful.20group.20theory.20lemmas/with/546738566. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra new-contributor
label:t-algebra$
 28/0 Mathlib/Algebra/Group/Subgroup/Pointwise.lean 1 23 ['FrederickPu', 'eric-wieser', 'github-actions', 'plp127', 'tb65536'] nobody
94-22695
3 months ago
94-27329
94 days ago
1-21290
1 day
34019 adomani
author:adomani
 feat: global syntax linter This linter is very unstable when editing interactively a file, since it inspects pairs of commands, rather than individual commands. For this reason, the linter should only run in CI. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-linter large-import 141/0 Mathlib.lean,Mathlib/Init.lean,Mathlib/Tactic.lean,Mathlib/Tactic/Linter/GlobalSyntax.lean 4 7 ['SnirBroshi', 'adomani', 'bryangingechen', 'github-actions', 'mathlib-splicebot'] nobody
94-20414
3 months ago
unknown
0-0
0 seconds
33793 LTolDe
author:LTolDe
 feat(MeasureTheory/Constructions/Polish/Basic): add lemma AnalyticSet.inter_nonempty_of_nowhereMeagre add lemma AnalyticSet.inter_nonempty_of_nowhereMeagre, the main ingredient for the proof of the **Effros' Theorem**, see [#mathlib4 > Effros Theorem](https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/Effros.20Theorem/with/566543328) introduce definition of a nowhere meagre set --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-measure-probability new-contributor awaiting-author 37/0 Mathlib/MeasureTheory/Constructions/Polish/Basic.lean,Mathlib/Order/Filter/Basic.lean,Mathlib/Topology/GDelta/Basic.lean 3 8 ['MichaelStollBayreuth', 'erdOne', 'github-actions', 'j-loreaux'] kex-y
assignee:kex-y
94-18452
3 months ago
94-18658
94 days ago
39-9555
39 days
24965 erdOne
author:erdOne
 refactor: Make `IsLocalHom` take unbundled map Under the current definition, `IsLocalHom f` and `IsLocalHom f.toMonoidHom` are not defeq, which causes quite some annoyances. We also have a consensus to not use `*HomClass` in definitions. As a result, we change `IsLocalHom` to take an unbundled function instead of a funlike. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra delegated merge-conflict
label:t-algebra$
 18/9 Mathlib/Algebra/Group/Units/Hom.lean,Mathlib/AlgebraicGeometry/Scheme.lean,Mathlib/Geometry/RingedSpace/LocallyRingedSpace.lean,Mathlib/Geometry/RingedSpace/OpenImmersion.lean,Mathlib/RingTheory/LocalRing/ResidueField/Basic.lean 5 15 ['adomani', 'alreadydone', 'erdOne', 'eric-wieser', 'github-actions', 'jcommelin', 'leanprover-community-bot-assistant', 'mathlib-bors', 'mathlib-merge-conflicts', 'mathlib4-merge-conflict-bot', 'vihdzp'] mattrobball
assignee:mattrobball
93-80829
3 months ago
185-46598
185 days ago
24-84527
24 days
25622 eric-wieser
author:eric-wieser
 refactor: overhaul instances on LocalizedModule This: * Generalizes the `SMul`, `Module`, and `Algebra` instances via appropriate compatibility conditions * Generalizes the `Mul` instance to the non-unital setting * Fixes instances diamonds for the `Nat`- and `Int`-actions --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra merge-conflict
label:t-algebra$
 214/100 Mathlib/Algebra/Module/LocalizedModule/Basic.lean 1 6 ['erdOne', 'eric-wieser', 'github-actions', 'leanprover-community-bot-assistant', 'mathlib-merge-conflicts'] nobody
93-80826
3 months ago
unknown
0-0
0 seconds
25980 Multramate
author:Multramate
 refactor(Algebra/Group/Submonoid/Operations): rename restrict to domRestrict and add restrict And update the documentation for consistency t-group-theory merge-conflict 145/123 Mathlib/Algebra/Group/Subgroup/Basic.lean,Mathlib/Algebra/Group/Subgroup/Ker.lean,Mathlib/Algebra/Group/Submonoid/Operations.lean,Mathlib/GroupTheory/FiniteAbelian/Duality.lean,Mathlib/GroupTheory/MonoidLocalization/Basic.lean,Mathlib/GroupTheory/MonoidLocalization/Maps.lean,Mathlib/GroupTheory/MonoidLocalization/MonoidWithZero.lean,Mathlib/GroupTheory/PGroup.lean,Mathlib/GroupTheory/QuotientGroup/Basic.lean,Mathlib/GroupTheory/Transfer.lean,Mathlib/LinearAlgebra/RootSystem/WeylGroup.lean,Mathlib/NumberTheory/NumberField/CMField.lean,Mathlib/NumberTheory/NumberField/Ideal/Basic.lean,Mathlib/RingTheory/Localization/Defs.lean 14 10 ['Multramate', 'copilot-pull-request-reviewer', 'github-actions', 'mathlib-merge-conflicts'] nobody
93-80701
3 months ago
93-80702
93 days ago
5-9216
5 days
25981 Multramate
author:Multramate
 feat(GroupTheory/GroupAction/Basic): define homomorphisms of fixed subgroups induced by homomorphisms of groups This PR continues the work from #10126. Original PR: https://github.com/leanprover-community/mathlib4/pull/10126 t-group-theory large-import merge-conflict 218/144 Mathlib/Algebra/Group/Subgroup/Basic.lean,Mathlib/Algebra/Group/Subgroup/Ker.lean,Mathlib/Algebra/Group/Submonoid/Operations.lean,Mathlib/Algebra/Ring/Action/Submonoid.lean,Mathlib/GroupTheory/FiniteAbelian/Duality.lean,Mathlib/GroupTheory/GroupAction/Defs.lean,Mathlib/GroupTheory/MonoidLocalization/Basic.lean,Mathlib/GroupTheory/MonoidLocalization/Maps.lean,Mathlib/GroupTheory/MonoidLocalization/MonoidWithZero.lean,Mathlib/GroupTheory/PGroup.lean,Mathlib/GroupTheory/QuotientGroup/Basic.lean,Mathlib/GroupTheory/Transfer.lean,Mathlib/LinearAlgebra/RootSystem/WeylGroup.lean,Mathlib/NumberTheory/NumberField/CMField.lean,Mathlib/NumberTheory/NumberField/Ideal/Basic.lean,Mathlib/RingTheory/Localization/Defs.lean 16 8 ['copilot-pull-request-reviewer', 'github-actions', 'mathlib-merge-conflicts'] nobody
93-80700
3 months ago
93-80700
93 days ago
4-78395
4 days
26377 Whysoserioushah
author:Whysoserioushah
 feat(RingTheory/SimpleRing/TensorProduct): tensor product of a simple algebra and a central simple algebra is simple co-authored-by: @jjaassoonn --- t-ring-theory large-import awaiting-author merge-conflict 326/8 Mathlib.lean,Mathlib/RingTheory/SimpleRing/TensorProduct.lean,Mathlib/RingTheory/TwoSidedIdeal/Kernel.lean,Mathlib/RingTheory/TwoSidedIdeal/Lattice.lean,Mathlib/RingTheory/TwoSidedIdeal/Operations.lean 5 71 ['Ruben-VandeVelde', 'Whysoserioushah', 'chrisflav', 'eric-wieser', 'github-actions', 'kbuzzard', 'kckennylau', 'mathlib-merge-conflicts', 'mathlib4-merge-conflict-bot', 'vlad902'] chrisflav and kbuzzard
assignee:kbuzzard assignee:chrisflav
93-80697
3 months ago
66-15457
66 days ago
43-37413
43 days
35313 LexinonCraft
author:LexinonCraft
 feat: IMO 2025 Q4 This adds a solution for problem 4 from the International Math Olympiad 2025. --- IMO new-contributor awaiting-author 631/0 Archive.lean,Archive/Imo/Imo2025Q4.lean 2 4 ['LexinonCraft', 'github-actions', 'jsm28'] jsm28
assignee:jsm28
93-74726
3 months ago
93-74726
93 days ago
3-30421
3 days
31603 alreadydone
author:alreadydone
 chore(Algebra): make `RatFunc` an abbrev I think there's no instance on `FractionRing K[X]` that shouldn't be shared by `RatFunc K`, so it's better to make the latter an abbrev. In the ongoing [Lüroth project](https://github.com/hdlean/mathlib4/pull/1/files#diff-02a084b8d8540eab8a346db8be4ba1a2b39b086bc1407125536d96adf6544544) I've been using `FractionRing K[X]` and it would be nice if we could gain direct access to `RatFunc` API (though not much is relevant, there was already one case where it's helpful), and if our results could be directly applied to RatFunc rather than going through some isomorphism boilerplate. Of course, some `IsRatFunc` predicate could also be an option (IsField + generated by one transcendental element over base field). --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) awaiting-author t-algebra RFC merge-conflict
label:t-algebra$
 113/423 Mathlib/FieldTheory/Laurent.lean,Mathlib/FieldTheory/RatFunc/AsPolynomial.lean,Mathlib/FieldTheory/RatFunc/Basic.lean,Mathlib/FieldTheory/RatFunc/Defs.lean,scripts/nolints_prime_decls.txt 5 24 ['Vierkantor', 'alreadydone', 'erdOne', 'github-actions', 'leanprover-bot', 'leanprover-radar', 'mathlib-merge-conflicts', 'mathlib4-merge-conflict-bot', 'mattrobball'] erdOne
assignee:erdOne
93-58603
3 months ago
180-81827
180 days ago
9-5124
9 days
33276 NicolaBernini
author:NicolaBernini
 feat: Rename List.reverse_perm to List.reverse_perm_self and List.reverse_perm' to List.reverse_perm_iff --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor awaiting-author t-data merge-conflict 17/15 Mathlib/Algebra/BigOperators/Group/List/Basic.lean,Mathlib/Data/Finset/Dedup.lean,Mathlib/Data/List/Basic.lean,Mathlib/Data/List/Defs.lean,Mathlib/Data/List/Perm/Lattice.lean,Mathlib/Data/List/Permutation.lean,Mathlib/Data/Multiset/Defs.lean,Mathlib/NumberTheory/Divisors.lean 8 5 ['Ruben-VandeVelde', 'github-actions', 'mathlib-merge-conflicts'] kim-em
assignee:kim-em
93-58470
3 months ago
144-36743
144 days ago
4-4467
4 days
33303 sinhp
author:sinhp
 feat(CategoryTheory): The monads and comonads of locally cartesian closed categories --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) WIP t-category-theory merge-conflict 405/8 Mathlib/CategoryTheory/Comma/Over/Basic.lean,Mathlib/CategoryTheory/LocallyCartesianClosed/ChosenPullbacksAlong.lean,Mathlib/CategoryTheory/LocallyCartesianClosed/Monad.lean 3 3 ['github-actions', 'mathlib-merge-conflicts', 'mathlib4-merge-conflict-bot'] nobody
93-58469
3 months ago
147-40829
147 days ago
0-20
20 seconds
33795 alreadydone
author:alreadydone
 feat(Topology/Sheaves): LocalPredicate prerequisite for étalé spaces --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-topology merge-conflict 418/143 Mathlib/AlgebraicGeometry/ProjectiveSpectrum/StructureSheaf.lean,Mathlib/Geometry/Manifold/Sheaf/Smooth.lean,Mathlib/Logic/Equiv/Basic.lean,Mathlib/Topology/Sheaves/LocalPredicate.lean,Mathlib/Topology/Sheaves/Sheafify.lean,Mathlib/Topology/Sheaves/Stalks.lean 6 12 ['adamtopaz', 'alreadydone', 'dagurtomas', 'github-actions', 'mathlib-merge-conflicts'] adamtopaz
assignee:adamtopaz
93-58334
3 months ago
93-58335
93 days ago
34-21636
34 days
33810 dupuisf
author:dupuisf
 feat: add instances of `LawfulInv` --- - [ ] depends on: #33441 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) WIP merge-conflict blocked-by-other-PR 187/22 Mathlib/Algebra/GroupWithZero/Defs.lean,Mathlib/Algebra/GroupWithZero/Invertible.lean,Mathlib/Algebra/GroupWithZero/Units/Basic.lean,Mathlib/Analysis/CStarAlgebra/CStarMatrix.lean,Mathlib/LinearAlgebra/Matrix/NonsingularInverse.lean,Mathlib/LinearAlgebra/Matrix/PosDef.lean,Mathlib/RingTheory/DividedPowers/Padic.lean,Mathlib/Topology/Algebra/Module/Equiv.lean,Mathlib/Topology/ContinuousMap/Bounded/Basic.lean 9 3 ['github-actions', 'mathlib-dependent-issues', 'mathlib-merge-conflicts'] nobody
93-58333
3 months ago
132-83275
132 days ago
0-1
1 second
34075 eric-wieser
author:eric-wieser
 feat: add a typeclass for the continuum hypothesis This allows a proof from the Archive to be promoted to mathlib itself. The proof strategy of `iff_exists_sierpinski_pathological_pred` was written almost entirely with public Gemini 3 Thinking, and then manually corrected. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-set-theory merge-conflict awaiting-author 200/58 Counterexamples/Phillips.lean,Mathlib.lean,Mathlib/SetTheory/Cardinal/ContinuumHypothesis.lean,Mathlib/Tactic/Linter/DirectoryDependency.lean 3 27 ['b-mehta', 'eric-wieser', 'github-actions', 'grunweg', 'mathlib-merge-conflicts', 'plp127', 'vihdzp'] nobody
93-57152
3 months ago
41-82331
41 days ago
0-44643
12 hours
34179 alreadydone
author:alreadydone
 refactor(Algebra): weaken NormalizationMonoid This PR replaces the two fields ``` normUnit_mul : ∀ {a b}, a ≠ 0 → b ≠ 0 → normUnit (a * b) = normUnit a * normUnit b normUnit_coe_units : ∀ u : αˣ, normUnit u = u⁻¹ ``` in the definition of NormalizationMonoid by ``` normUnit_one : normUnit 1 = 1 normUnit_mul_units {a : α} (u : αˣ) : a ≠ 0 → normUnit (a * u) = u⁻¹ * normUnit a ``` and rename the old version to StrongNormalizationMonoid. The vast majority of API continue to hold under this weakened notion of NormalizationMonoid; only a handful requires the original notion. Every cancellative monoid with zero admits a weakened NormalizationMonoid structure, and every GCDMonoid admits a weakened NormalizedGCDMonoid structure. This allows us to generalize [Polynomial.normalizedGcdMonoid](https://leanprover-community.github.io/mathlib4_docs/Mathlib/RingTheory/Polynomial/Content.html#Polynomial.normalizedGcdMonoid) to all GCDMonoids. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-ring-theory t-algebra awaiting-author merge-conflict
label:t-algebra$
 505/330 Mathlib/Algebra/GCDMonoid/Basic.lean,Mathlib/Algebra/GCDMonoid/Finset.lean,Mathlib/Algebra/GCDMonoid/IntegrallyClosed.lean,Mathlib/Algebra/GCDMonoid/Multiset.lean,Mathlib/Algebra/GCDMonoid/Nat.lean,Mathlib/Algebra/GCDMonoid/PUnit.lean,Mathlib/Algebra/GroupWithZero/Associated.lean,Mathlib/Algebra/Polynomial/FieldDivision.lean,Mathlib/NumberTheory/FLT/Basic.lean,Mathlib/RingTheory/ChainOfDivisors.lean,Mathlib/RingTheory/DedekindDomain/Ideal/Basic.lean,Mathlib/RingTheory/DedekindDomain/Ideal/Lemmas.lean,Mathlib/RingTheory/Polynomial/Content.lean,Mathlib/RingTheory/Polynomial/GaussLemma.lean,Mathlib/RingTheory/PowerSeries/Inverse.lean,Mathlib/RingTheory/PrincipalIdealDomain.lean,Mathlib/RingTheory/UniqueFactorizationDomain/Finite.lean,Mathlib/RingTheory/UniqueFactorizationDomain/GCDMonoid.lean,Mathlib/RingTheory/UniqueFactorizationDomain/Multiplicative.lean,Mathlib/RingTheory/UniqueFactorizationDomain/NormalizedFactors.lean 20 28 ['alreadydone', 'erdOne', 'github-actions', 'leanprover-radar', 'mathlib-merge-conflicts'] erdOne
assignee:erdOne
93-57148
3 months ago
110-85973
110 days ago
9-10392
9 days
34955 thorimur
author:thorimur
 chore: test overlapping instances linter This draft PR is intended to test-run the syntax version of the overlapping instances linter in [this PR](https://github.com/JovanGerb/mathlib4/pull/1). The two purposes are 1. benching 2. figuring out which violations we should exempt/fix This PR is not intended to be merged. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) large-import merge-conflict 515/14 Mathlib.lean,Mathlib/Algebra/Group/Submonoid/Operations.lean,Mathlib/Algebra/Order/Antidiag/Prod.lean,Mathlib/CategoryTheory/Monoidal/Closed/Cartesian.lean,Mathlib/CategoryTheory/Shift/Pullback.lean,Mathlib/Init.lean,Mathlib/Lean/ContextInfo.lean,Mathlib/Lean/Elab/InfoTree.lean,Mathlib/Lean/LocalContext.lean,Mathlib/Lean/Message.lean,Mathlib/Tactic.lean,Mathlib/Tactic/Linter/DirectoryDependency.lean,Mathlib/Tactic/Linter/OverlappingInstances.lean,MathlibTest/OverlappingInstances.lean 14 8 ['github-actions', 'leanprover-radar', 'mathlib-merge-conflicts', 'thorimur'] nobody
93-56879
3 months ago
unknown
0-0
0 seconds
26299 adomani
author:adomani
 perf: the `whitespace` linter only acts on modified files Introduces an `IO.Ref` to allow the `commandStart` linter to only run on files that git considers modified with respect to `master`. The linter is also active on files that have had some error, as these are likely being modified! The PR should also mitigate the speed-up that the linter introduced: [#mathlib4 > A whitespace linter @ 💬](https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/A.20whitespace.20linter/near/525091877) Assuming that this goes well, a similar mechanism could be applied to several linters that do not need to run on all code, just on the modified code. Implementation detail: the linter is currently either on or off in "whole" files. It may be also a future development to make this more granular and only run the linter on "modifed commands in modified files", but this is not currently the plan for this modification! --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-linter awaiting-zulip awaiting-author 55/7 Mathlib/Tactic/Linter/Whitespace.lean 1 20 ['adomani', 'eric-wieser', 'github-actions', 'grunweg', 'joneugster', 'kim-em', 'leanprover-bot', 'leanprover-radar', 'mathlib-bors', 'mathlib4-merge-conflict-bot'] grunweg
assignee:grunweg
93-50768
3 months ago
266-47086
266 days ago
66-73556
66 days
35345 grunweg
author:grunweg
 feat(Linter.openClassical): also lint for Classical declarations as …a local or scoped instance. Rebased and migrated version of #23763. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-linter 131/31 Mathlib/RingTheory/Perfection.lean,Mathlib/Tactic/Linter/Style.lean,Mathlib/Topology/MetricSpace/GromovHausdorffRealized.lean,MathlibTest/LintStyle.lean 4 1 ['github-actions'] nobody
93-47169
3 months ago
96-7373
96 days ago
0-26672
7 hours
34674 Citronhat
author:Citronhat
 feat(Algebra/Order/Ring): replace ENNReal lemmas with WithTop versions * Add `WithTop` versions of basic multiplicative order lemmas. * Use the new `WithTop` lemmas to replace `ENNReal` proofs and address six TODOs. * Fix a typo in the `pos_of_ne_zero` alias name. new-contributor t-algebra merge-conflict
label:t-algebra$
 46/15 Mathlib/Algebra/Order/Monoid/Canonical/Defs.lean,Mathlib/Algebra/Order/Ring/WithTop.lean,Mathlib/Data/ENNReal/Operations.lean 3 5 ['Citronhat', 'Ruben-VandeVelde', 'github-actions', 'mathlib-merge-conflicts'] Ruben-VandeVelde
assignee:Ruben-VandeVelde
93-38204
3 months ago
93-38205
93 days ago
17-1225
17 days
31892 jsm28
author:jsm28
 feat(Geometry/Euclidean/Sphere/PolePolar): poles and polars Define poles and polars for spheres in Euclidean affine spaces, and set up some basic API, including in particular La Hire's theorem (`p₁` lies on the polar of `p₂` if and only if `p₂` lies on the polar of `p₁`). Poles and polars are actually meaningful for any quadric in a projective space over any field, but I think it's reasonable to set up this theory for spheres in the Euclidean context and potentially link it in future to more general projective geometry. --- - [ ] depends on: #31891 - [ ] depends on: #32296 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-euclidean-geometry blocked-by-other-PR 424/7 Mathlib.lean,Mathlib/Geometry/Euclidean/Sphere/PolePolar.lean 4 4 ['Parcly-Taxel', 'github-actions', 'mathlib-dependent-issues', 'mathlib-merge-conflicts'] nobody
93-31990
3 months ago
56-13330
56 days ago
56-13801
56 days
31893 jsm28
author:jsm28
 feat(Geometry/Euclidean/Sphere/Tangent): characterize `tangentsFrom` Add lemmas relating tangency to polars, and thereby characterizing `tangentsFrom`: empty for a point inside the sphere, a singleton for a point on the sphere and, in two dimensions, of cardinality two for a point outside the circle. --- - [ ] depends on: #31891 - [ ] depends on: #31892 - [ ] depends on: #32296 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) blocked-by-other-PR t-euclidean-geometry 483/9 Mathlib.lean,Mathlib/Geometry/Euclidean/Sphere/PolePolar.lean,Mathlib/Geometry/Euclidean/Sphere/Tangent.lean 4 4 ['github-actions', 'mathlib-merge-conflicts', 'mathlib4-dependent-issues-bot'] nobody
93-31924
3 months ago
182-33523
182 days ago
0-313
5 minutes
35324 harahu
author:harahu
 chore: add H1 headers This PR introduces a script that identifies lean files that don't have an H1 header. I've added a placeholder header to the identified files and will use this branch to develop smaller PRs. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) WIP merge-conflict 1749/0 Archive/Wiedijk100Theorems/CubingACube.lean,Cache/Hashing.lean,Cache/IO.lean,Cache/Init.lean,Cache/Main.lean,Cache/Requests.lean,Counterexamples/CanonicallyOrderedCommSemiringTwoMul.lean,Counterexamples/IrrationalPowerOfIrrational.lean,Mathlib/Algebra/Algebra/Subalgebra/IsSimpleOrder.lean,Mathlib/Algebra/AlgebraicCard.lean,Mathlib/Algebra/ArithmeticGeometric.lean,Mathlib/Algebra/Category/Grp/FiniteGrp.lean,Mathlib/Algebra/Category/Grp/ZModuleEquivalence.lean,Mathlib/Algebra/Category/ModuleCat/Adjunctions.lean,Mathlib/Algebra/CharP/Frobenius.lean,Mathlib/Algebra/GroupWithZero/Int.lean,Mathlib/Algebra/Homology/ComplexShapeSigns.lean,Mathlib/Algebra/Homology/HomologicalComplexBiprod.lean,Mathlib/Algebra/Homology/HomotopyCategory/HomComplex.lean,Mathlib/Algebra/Homology/HomotopyCategory/HomComplexShift.lean,Mathlib/Algebra/Homology/HomotopyCategory/HomologicalFunctor.lean,Mathlib/Algebra/Homology/HomotopyCategory/Pretriangulated.lean,Mathlib/Algebra/Homology/HomotopyCategory/Triangulated.lean,Mathlib/Algebra/Homology/HomotopyCofiber.lean,Mathlib/Algebra/Homology/Localization.lean,Mathlib/Algebra/Homology/TotalComplexSymmetry.lean,Mathlib/Algebra/Lie/CartanMatrix.lean,Mathlib/Algebra/ModEq.lean,Mathlib/Algebra/Module/Submodule/Equiv.lean,Mathlib/Algebra/MvPolynomial/Counit.lean,Mathlib/Algebra/MvPolynomial/Expand.lean,Mathlib/Algebra/NoZeroSMulDivisors/Prod.lean,Mathlib/Algebra/Order/Archimedean/Hom.lean,Mathlib/Algebra/Order/Field/Defs.lean,Mathlib/Algebra/Order/Interval/Set/Group.lean,Mathlib/Algebra/Order/Module/Algebra.lean,Mathlib/Algebra/Order/Monoid/ToMulBot.lean,Mathlib/Algebra/Order/PartialSups.lean,Mathlib/Algebra/Polynomial/Degree/Definitions.lean,Mathlib/Algebra/Polynomial/Factors.lean,Mathlib/Algebra/QuadraticAlgebra.lean,Mathlib/AlgebraicGeometry/Morphisms/UnderlyingMap.lean,Mathlib/AlgebraicTopology/DoldKan/Compatibility.lean,Mathlib/AlgebraicTopology/DoldKan/EquivalenceAdditive.lean,Mathlib/AlgebraicTopology/DoldKan/GammaCompN.lean,Mathlib/AlgebraicTopology/DoldKan/NCompGamma.lean,Mathlib/AlgebraicTopology/MooreComplex.lean,Mathlib/AlgebraicTopology/SimplexCategory/Augmented.lean,Mathlib/Analysis/Analytic/CPolynomialDef.lean,Mathlib/Analysis/Calculus/ContDiff/RestrictScalars.lean,Mathlib/Analysis/Calculus/Deriv/Shift.lean,Mathlib/Analysis/Calculus/TangentCone.lean,Mathlib/Analysis/Distribution/FourierSchwartz.lean,Mathlib/Analysis/Distribution/SchwartzSpace.lean,Mathlib/Analysis/InnerProductSpace/Harmonic/Analytic.lean,Mathlib/Analysis/InnerProductSpace/Projection.lean,Mathlib/Analysis/Matrix.lean,Mathlib/Analysis/Normed/Field/Ultra.lean,Mathlib/Analysis/Normed/Module/ENormedSpace.lean,Mathlib/Analysis/NormedSpace/Alternating/Basic.lean,Mathlib/Analysis/NormedSpace/Alternating/Curry.lean,Mathlib/Analysis/NormedSpace/Alternating/Uncurry/Fin.lean,Mathlib/Analysis/NormedSpace/BallAction.lean,Mathlib/Analysis/NormedSpace/ConformalLinearMap.lean,Mathlib/Analysis/NormedSpace/Connected.lean,Mathlib/Analysis/NormedSpace/DualNumber.lean,Mathlib/Analysis/NormedSpace/ENormedSpace.lean,Mathlib/Analysis/NormedSpace/Extend.lean,Mathlib/Analysis/NormedSpace/Extr.lean,Mathlib/Analysis/NormedSpace/FunctionSeries.lean,Mathlib/Analysis/NormedSpace/HahnBanach/Extension.lean,Mathlib/Analysis/NormedSpace/HahnBanach/SeparatingDual.lean,Mathlib/Analysis/NormedSpace/HahnBanach/Separation.lean,Mathlib/Analysis/NormedSpace/HomeomorphBall.lean,Mathlib/Analysis/NormedSpace/IndicatorFunction.lean,Mathlib/Analysis/NormedSpace/Int.lean,Mathlib/Analysis/NormedSpace/MStructure.lean,Mathlib/Analysis/NormedSpace/Multilinear/Basic.lean,Mathlib/Analysis/NormedSpace/Multilinear/Curry.lean,Mathlib/Analysis/NormedSpace/MultipliableUniformlyOn.lean,Mathlib/Analysis/NormedSpace/Normalize.lean,Mathlib/Analysis/NormedSpace/OperatorNorm/Asymptotics.lean,Mathlib/Analysis/NormedSpace/OperatorNorm/Basic.lean,Mathlib/Analysis/NormedSpace/OperatorNorm/Bilinear.lean,Mathlib/Analysis/NormedSpace/OperatorNorm/Completeness.lean,Mathlib/Analysis/NormedSpace/OperatorNorm/Mul.lean,Mathlib/Analysis/NormedSpace/OperatorNorm/NNNorm.lean,Mathlib/Analysis/NormedSpace/OperatorNorm/NormedSpace.lean,Mathlib/Analysis/NormedSpace/OperatorNorm/Prod.lean,Mathlib/Analysis/NormedSpace/PiTensorProduct/InjectiveSeminorm.lean,Mathlib/Analysis/NormedSpace/PiTensorProduct/ProjectiveSeminorm.lean,Mathlib/Analysis/NormedSpace/Pointwise.lean,Mathlib/Analysis/NormedSpace/RCLike.lean,Mathlib/Analysis/NormedSpace/Real.lean,Mathlib/Analysis/NormedSpace/RieszLemma.lean,Mathlib/Analysis/NormedSpace/SphereNormEquiv.lean,Mathlib/Analysis/Real/Pi/Leibniz.lean,Mathlib/Analysis/SpecialFunctions/ContinuousFunctionalCalculus/ExpLog.lean,Mathlib/Analysis/SpecialFunctions/Trigonometric/Chebyshev.lean,Mathlib/CategoryTheory/Adhesive.lean 348 3 ['github-actions', 'harahu', 'mathlib-merge-conflicts'] nobody
91-64784
3 months ago
unknown
0-0
0 seconds
34240 mcdoll
author:mcdoll
 feat(Analysis/Distribution): additional properties of the support --- - [x] depends on: #34593 - [x] depends on: #34595 - [ ] depends on: #34637 - [x] depends on: #34638 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) WIP t-analysis merge-conflict blocked-by-other-PR 494/2 Mathlib/Analysis/Calculus/FDeriv/Const.lean,Mathlib/Analysis/Distribution/SchwartzSpace/Basic.lean,Mathlib/Analysis/Distribution/SchwartzSpace/Deriv.lean,Mathlib/Analysis/Distribution/Support.lean,Mathlib/Analysis/Distribution/TemperateGrowth.lean,Mathlib/Geometry/Manifold/PartitionOfUnity.lean 6 4 ['github-actions', 'mathlib-dependent-issues', 'mathlib4-merge-conflict-bot'] nobody
91-61739
3 months ago
120-78243
120 days ago
0-34
34 seconds
35558 mcdoll
author:mcdoll
 feat(Analysis/Distribution): algebraic properties of the support --- - [ ] depends on: #34637 - [ ] depends on: #33477 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) blocked-by-other-PR t-analysis merge-conflict 325/0 Mathlib/Analysis/Distribution/Support.lean 1 3 ['github-actions', 'mathlib-dependent-issues', 'mathlib-merge-conflicts'] nobody
91-61321
3 months ago
91-61322
91 days ago
0-1208
20 minutes
35352 themathqueen
author:themathqueen
 feat(Analysis/CStarAlgebra): the norm of a positive linear functional `f` on a unital C*-algebra is `f 1` --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-analysis awaiting-author 24/0 Mathlib/Analysis/CStarAlgebra/GelfandNaimarkSegal.lean,Mathlib/Analysis/CStarAlgebra/PositiveLinearMap.lean 2 7 ['github-actions', 'j-loreaux', 'themathqueen'] j-loreaux
assignee:j-loreaux
91-46187
3 months ago
91-46190
91 days ago
4-65379
4 days
25989 Multramate
author:Multramate
 feat(NumberTheory/EllipticDivisibilitySequence): add elliptic nets This PR continues the work from #25030. Original PR: https://github.com/leanprover-community/mathlib4/pull/25030 t-number-theory large-import awaiting-author 254/39 Mathlib/NumberTheory/EllipticDivisibilitySequence.lean 1 27 ['MichaelStollBayreuth', 'Multramate', 'copilot-pull-request-reviewer', 'github-actions', 'mathlib4-merge-conflict-bot', 'tb65536'] tb65536
assignee:tb65536
91-40294
3 months ago
91-40294
91 days ago
55-47427
55 days
35411 daniel-carranza
author:daniel-carranza
 feat(CategoryTheory/Enriched/Limits): define cotensors in an enriched category Defines the notion of cotensors in a `V`-category `C`, where `V` is a braided monoidal category. Proves that `V` itself has all cotensors when viewed as a category enriched in `V`. Also proves that if `C` has all cotensors and `V` is additionally symmetric then the cotensors form a `V`-functor from the enriched tensor product`V\op \times C` to `C`. --- This work originates from the infinity-cosmos project, where the dual theory of tensors was formalized by @arnoudvanderleer . The current version of this code introduces an `abbrev` definition `Ehom V C x y` for the hom-object C(x, y) in V. The intention is to make the code easier to both to write and read; the existing notation `x \hom[V] y` throws an error when instantiated at `C` = `V` (`ambiguous term;` `Possible interpretations:` `(ihom x).obj y : V` `x ⟶[V] y : V`). A possibly related issue is there are a few calls to `erw` that stem from a failure to identify `(ihom x).obj : V` with `Ehom V V x y`. Any help with these issues, or any other assistance, is greatly appreciated! - [ ] depends on: #35144 [required to prove `V`-functoriality of cotensors] - [ ] depends on: #35436 [required to prove that `V` admits all cotensors by itself] [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) WIP t-category-theory infinity-cosmos blocked-by-other-PR merge-conflict 822/0 Mathlib.lean,Mathlib/CategoryTheory/Enriched/Limits/Cotensors.lean,Mathlib/CategoryTheory/Enriched/TensorProductCategory.lean,Mathlib/CategoryTheory/Monoidal/Braided/Basic.lean,Mathlib/CategoryTheory/Monoidal/Closed/InternalCurrying.lean 5 4 ['github-actions', 'mathlib-dependent-issues', 'mathlib-merge-conflicts'] nobody
91-38780
3 months ago
95-19565
95 days ago
0-8
8 seconds
35545 joelriou
author:joelriou
 feat(Algebra/Category/ModuleCat): the internal hom for presheaves of modules --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra WIP please-adopt
label:t-algebra$
 141/0 Mathlib.lean,Mathlib/Algebra/Category/ModuleCat/Presheaf/InternalHom.lean,Mathlib/Algebra/Category/ModuleCat/Presheaf/Pushforward.lean 3 1 ['github-actions'] nobody
91-36918
3 months ago
92-5518
92 days ago
0-2
2 seconds
28246 Sebi-Kumar
author:Sebi-Kumar
 feat(AlgebraicTopology/FundamentalGroupoid): the n-sphere is simply connected for n > 1 Prove that the `n`-dimensional sphere (i.e., the unit sphere centered at the origin in `(n + 1)`-dimensional real Euclidean space) is a simply connected space for `n > 1`. This proof follows Hatcher's "Algebraic Topology"; we first prove a general lemma about decomposing loops and then exploit the fact that non-surjective loops in the sphere are homotopically trivial. Note: To get this file to build, I edited `Mathlib/Tactic/Linter/DirectoryDependency.lean` to remove the restrictions on AlgebraicTopology files importing Geometry, NumberTheory, and FieldTheory files. Thank you to those who shared their expertise [here](https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/Warning.20that.20AlgebraicTopology.20can't.20import.20SetTheory/with/533833638). As I understand it, this is just a short-term solution, so I would appreciate feedback on what to do about this situation. Note: I am unsure where exactly the file `SimplyConnectedSphere.lean` should go or whether that is an appropriate name for the file, so feedback there would be appreciated. --- To provide additional context, this code was written as a part of the Fields Undergraduate Summer Research Program at the University of Western Ontario under the supervision of Chris Kapulkin and Daniel Carranza. - [x] depends on: #28208 - [x] depends on: #28198 - [x] depends on: #28185 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebraic-topology new-contributor awaiting-author 343/3 Mathlib.lean,Mathlib/AlgebraicTopology/FundamentalGroupoid/SimplyConnectedSphere.lean,Mathlib/Tactic/Linter/DirectoryDependency.lean 3 17 ['dagurtomas', 'github-actions', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot', 'robin-carlier'] robin-carlier
assignee:robin-carlier
91-35990
3 months ago
91-35990
91 days ago
13-72199
13 days
31611 thorimur
author:thorimur
 feat(Meta): `withPlural` wrapper for more readable messages in source This small PR introduces a thin wrapper `withPlural` for Lean's textual datatypes so that we can write ``` "foo".withPlural "foos" count ``` instead of ``` if count = 1 then "foo" else "foos" ``` The dot notation here is chosen so that the singular version of the word appears at the start of the syntax, as opposed to buried in an `if/then`. This makes dynamically pluralizing a word in `MessageData` (which is a relatively common occurrence) a bit easier to read in source, especially when multiple pluralizations are needed close to one another. --- Am I handling the copyright header correctly? My reasoning is that the file was devoid of content, and so this is ultimately a new file. But I'm not sure this is technically what should happen here. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-meta awaiting-author merge-conflict 63/5 Mathlib/Lean/Message.lean 1 21 ['adomani', 'github-actions', 'grunweg', 'mathlib-merge-conflicts', 'mathlib4-merge-conflict-bot', 'thorimur'] nobody
91-28217
3 months ago
168-12874
168 days ago
21-2788
21 days
35524 grunweg
author:grunweg
 feat: text-based linter against \t followed by tactic mode Wait for the zulip discussion to converge. **If** there is consensus in favour of this change, summarise the motivation here. [zulip discuss](https://leanprover.zulipchat.com/#narrow/channel/345428-mathlib-reviewers/topic/proposal.3A.20no.20more.20use.20of.20.60.E2.96.B8.60.20in.20Mathlib.3F/with/574680826) --- There are currently 80 remaining exceptions in mathlib: ideally, these would get fixed before merging this. Works best when combined with #35523. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-linter awaiting-zulip merge-conflict 23/2 Mathlib/Tactic/Linter/TextBased.lean 1 5 ['github-actions', 'grunweg', 'joneugster', 'mathlib-merge-conflicts', 'vihdzp'] nobody
91-21387
3 months ago
92-44159
92 days ago
0-3308
55 minutes
35578 Shreyas4991
author:Shreyas4991
 fix: writer monad should use an additive logging type The Writer monad's w type is supposed to be additive, not multiplicative. This is how it is conceptually used in Haskell (as a logging type). Haskell uses `Monoid` because it doesn't make a distinction between `AddMonoid` and `Monoid`. [#mathlib4 > Writer should use an additive monoid @ 💬](https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/Writer.20should.20use.20an.20additive.20monoid/near/574990415) --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-data awaiting-zulip merge-conflict 10/10 Mathlib/Control/Monad/Cont.lean,Mathlib/Control/Monad/Writer.lean 2 5 ['Shreyas4991', 'eric-wieser', 'github-actions', 'mathlib-merge-conflicts'] nobody
90-86301
3 months ago
90-86302
90 days ago
0-18707
5 hours
35591 JovanGerb
author:JovanGerb
 draft: `gsimp` tactic This is a draft PR for exploring a potential `gsimp` tactic. It would be able to do some things that the current `grw` tactic cannot do. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-meta 1233/0 Mathlib/Tactic/GSimp/Core.lean,Mathlib/Tactic/GSimp/Elab.lean,Mathlib/Tactic/GSimp/GSimpTheorems.lean,Mathlib/Tactic/GSimp/Rewrite.lean,Mathlib/Tactic/GSimp/Types.lean,MathlibTest/GSimp.lean 5 3 ['github-actions', 'mathlib-bors'] nobody
90-80516
3 months ago
90-80593
90 days ago
0-6
6 seconds
34873 Hagb
author:Hagb
 feat(RingTheory/MvPolynomial/Groebner/Remainder): polynomial remainder used with Gröbner basis Definition and properties of remainder on division of a multivariate polynomial by a set of multivariate polynomials. Some lemmas are for formalization of properties of Gröbner basis. The previous `Mathlib/RingTheory/MvPolynomial/Groebner.lean` is moved to `Mathlib/RingTheory/MvPolynomial/Groebner/Division.lean`, and used by `Mathlib/RingTheory/MvPolynomial/Groebner/Remainder.lean` for the proof of remainder's existence. The PR is upstreamized from https://github.com/WuProver/groebner_proj. Co-authored-by: Hao Shen [3118181069@qq.com](mailto:3118181069@qq.com) --- CC @tsuki8 - [ ] depends on: #34759 - [ ] depends on: #34872 todo: - [ ] some theorems can be generalized to avoid requiring `IsUnit` [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) large-import blocked-by-other-PR t-ring-theory WIP merge-conflict 1324/262 Mathlib.lean,Mathlib/Algebra/Order/Monoid/Unbundled/WithTop.lean,Mathlib/Combinatorics/Matroid/Closure.lean,Mathlib/Data/Finsupp/Basic.lean,Mathlib/Data/Finsupp/MonomialOrder.lean,Mathlib/Logic/Basic.lean,Mathlib/RingTheory/MvPolynomial/Groebner.lean,Mathlib/RingTheory/MvPolynomial/Groebner/Division.lean,Mathlib/RingTheory/MvPolynomial/Groebner/Remainder.lean,Mathlib/RingTheory/MvPolynomial/MonomialOrder.lean,docs/references.bib 11 4 ['github-actions', 'joneugster', 'mathlib-dependent-issues', 'mathlib-merge-conflicts'] nobody
90-26128
3 months ago
106-26300
106 days ago
0-455
7 minutes
12933 grunweg
author:grunweg
 chore: replace some use of > or ≥ by < or ≤ These were flagged by the linter in #12879: it is easy to simple avoid > or ≥ in hypotheses or `have`s. --- - [x] depends on: #35346 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict awaiting-author 123/123 Archive/Imo/Imo1960Q1.lean,Archive/Imo/Imo1962Q1.lean,Archive/Imo/Imo1988Q6.lean,Archive/Imo/Imo2005Q3.lean,Archive/Imo/Imo2008Q2.lean,Archive/Imo/Imo2008Q4.lean,Archive/Imo/Imo2011Q5.lean,Archive/Imo/Imo2019Q4.lean,Archive/Wiedijk100Theorems/AreaOfACircle.lean,Archive/Wiedijk100Theorems/BallotProblem.lean,Mathlib/Algebra/DualNumber.lean,Mathlib/Algebra/Order/CauSeq/BigOperators.lean,Mathlib/Algebra/Order/Ring/Defs.lean,Mathlib/Algebra/Polynomial/Basic.lean,Mathlib/Algebra/Polynomial/Degree/Definitions.lean,Mathlib/Algebra/Star/CHSH.lean,Mathlib/Analysis/Analytic/Basic.lean,Mathlib/Analysis/Calculus/UniformLimitsDeriv.lean,Mathlib/Analysis/Complex/Hadamard.lean,Mathlib/Analysis/Complex/UpperHalfPlane/Basic.lean,Mathlib/Analysis/InnerProductSpace/Projection.lean,Mathlib/Analysis/Normed/Group/ControlledClosure.lean,Mathlib/Analysis/SpecialFunctions/Log/Base.lean,Mathlib/Analysis/SpecialFunctions/Trigonometric/Basic.lean,Mathlib/Combinatorics/SimpleGraph/DegreeSum.lean,Mathlib/Combinatorics/SimpleGraph/LapMatrix.lean,Mathlib/Data/Complex/Basic.lean,Mathlib/Data/FP/Basic.lean,Mathlib/Data/Finset/Basic.lean,Mathlib/Data/Finsupp/Notation.lean,Mathlib/Data/Nat/Dist.lean,Mathlib/Data/Nat/Lattice.lean,Mathlib/Data/Nat/Parity.lean,Mathlib/Data/Ordmap/Ordset.lean,Mathlib/Data/PNat/Basic.lean,Mathlib/Data/UInt.lean,Mathlib/GroupTheory/Coxeter/Length.lean,Mathlib/MeasureTheory/Constructions/Polish.lean,Mathlib/MeasureTheory/Covering/Besicovitch.lean,Mathlib/MeasureTheory/Covering/Vitali.lean,Mathlib/MeasureTheory/Covering/VitaliFamily.lean,Mathlib/MeasureTheory/Integral/Layercake.lean,Mathlib/NumberTheory/LegendreSymbol/JacobiSymbol.lean,Mathlib/NumberTheory/Padics/Hensel.lean,Mathlib/NumberTheory/Padics/PadicNorm.lean,Mathlib/NumberTheory/PellMatiyasevic.lean,Mathlib/NumberTheory/Rayleigh.lean,Mathlib/Probability/Process/Stopping.lean,Mathlib/Tactic/CancelDenoms/Core.lean,Mathlib/Tactic/IntervalCases.lean,Mathlib/Tactic/Linarith/Lemmas.lean,Mathlib/Tactic/Linarith/Oracle/FourierMotzkin.lean,Mathlib/Tactic/NormNum/GCD.lean,Mathlib/Tactic/NormNum/Inv.lean,Mathlib/Tactic/Ring/Basic.lean,Mathlib/Topology/Category/Profinite/Nobeling.lean,Mathlib/Topology/ContinuousFunction/Bounded.lean,Mathlib/Topology/MetricSpace/CauSeqFilter.lean,Mathlib/Topology/Sequences.lean,test/LibrarySearch/basic.lean,test/Use.lean,test/cancel_denoms.lean,test/linarith.lean,test/norm_cast.lean 64 7 ['YaelDillies', 'github-actions', 'grunweg', 'mathlib-dependent-issues'] nobody
89-62178
3 months ago
736-46057
736 days ago
0-55656
15 hours
33746 ster-oc
author:ster-oc
 feat(Algebra/Module/ZLattice): align `ZSpan.floor` to `Int.floor` API This PR adds some of the existent lemmas about `Int.floor`, `Int.ceil` and `Int.fract` to the `ZSpan` namespace. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra new-contributor merge-conflict
label:t-algebra$
 353/145 Mathlib/Algebra/Module/ZLattice/Basic.lean,Mathlib/Algebra/Order/Floor/Ring.lean,Mathlib/Topology/Algebra/Order/Floor.lean 3 8 ['github-actions', 'joelriou', 'mathlib-merge-conflicts', 'ster-oc'] joelriou
assignee:joelriou
88-55102
2 months ago
88-55102
88 days ago
30-23357
30 days
28291 vasnesterov
author:vasnesterov
 feat(Tactic): tactic for computing asymptotics of real functions It's an auxiliary PR that implements the entire `compute_asymptotics` tactic. I am spliting it into multiple small PRs. --- Tactic description: https://vasnesterov.github.io/compute_asymptotics Zulip announcement: [#announce > New tactic: `compute_asymptotics`](https://leanprover.zulipchat.com/#narrow/channel/113486-announce/topic/New.20tactic.3A.20.60compute_asymptotics.60/with/538639418) In this PR I implement the `compute_asymptotics` tactic. Its purpose is to compute asymptotics of functions from `ℝ` to `ℝ`. So far it is able to compute the limit of any function constructed using arithmetic operations (`+`, `-`, `*`, `/`, inversion), powers, logarithms, and exponents. ```lean import Mathlib.Tactic.ComputeAsymptotics open Real Filter Topology Asymptotics example : Tendsto (fun (x : ℝ) ↦ (1 + 6 * x⁻¹) ^ (7 * x)) atTop (𝓝 (exp 42)) := by compute_asymptotics example : (fun x ↦ x - 1 - log x) ~[𝓝[≠] 1] (fun x ↦ (x - 1) ^ 2 / 2) := by compute_asymptotics example (a b : ℝ) (h : a < b) : (fun x ↦ (x + x * log x) ^ a) =O[atTop] (fun x ↦ (x / log x) ^ b) := by compute_asymptotics example : (fun x ↦ log x) =o[𝓝[>] 0] (fun x ↦ Real.pi / (exp (Real.log 2 * x) - 1)) := by compute_asymptotics ``` For more examples see `compute_asymptotics.lean` in tests. ### TODO * Different domains in `compute_limit` as well. * Trigonometric functions and Gamma-function. ### References I am basically implementing [this article](https://www21.in.tum.de/~eberlm/pdfs/real_asymp.pdf) about computing asymptotics in Isabelle by Manuel Eberl. ### Small PRs Here's a few smaller PRs coming from this one, ordered by importance: - [ ] depends on: #37415 - [ ] depends on: #37342 - [x] depends on: #37418 - [x] depends on: #37411 - [x] depends on: #37414 - [x] depends on: #37419 - [x] depends on: #35072 - [x] depends on: #34922 - [x] depends on: #34356 - [x] depends on: #34422 - [x] depends on: #34403 - [x] depends on: #34311 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) WIP t-analysis t-meta large-import blocked-by-other-PR 12797/70 Mathlib.lean,Mathlib/Analysis/Analytic/Constructions.lean,Mathlib/Analysis/SpecialFunctions/Complex/Analytic.lean,Mathlib/Tactic.lean,Mathlib/Tactic/ComputeAsymptotics.lean,Mathlib/Tactic/ComputeAsymptotics/Meta/BasisM.lean,Mathlib/Tactic/ComputeAsymptotics/Meta/CompareMS.lean,Mathlib/Tactic/ComputeAsymptotics/Meta/CompareReal.lean,Mathlib/Tactic/ComputeAsymptotics/Meta/ConstSimp.lean,Mathlib/Tactic/ComputeAsymptotics/Meta/ConstSimpAttribute.lean,Mathlib/Tactic/ComputeAsymptotics/Meta/ConvertDomain.lean,Mathlib/Tactic/ComputeAsymptotics/Meta/Exp.lean,Mathlib/Tactic/ComputeAsymptotics/Meta/LeadingMonomial.lean,Mathlib/Tactic/ComputeAsymptotics/Meta/Log.lean,Mathlib/Tactic/ComputeAsymptotics/Meta/MS.lean,Mathlib/Tactic/ComputeAsymptotics/Meta/Misc.lean,Mathlib/Tactic/ComputeAsymptotics/Meta/Normalization.lean,Mathlib/Tactic/ComputeAsymptotics/Meta/Trimming.lean,Mathlib/Tactic/ComputeAsymptotics/Meta/ZeroOracle.lean,Mathlib/Tactic/ComputeAsymptotics/Multiseries.lean,Mathlib/Tactic/ComputeAsymptotics/Multiseries/Basic.lean,Mathlib/Tactic/ComputeAsymptotics/Multiseries/Basis.lean,Mathlib/Tactic/ComputeAsymptotics/Multiseries/Corecursion.lean,Mathlib/Tactic/ComputeAsymptotics/Multiseries/Defs.lean,Mathlib/Tactic/ComputeAsymptotics/Multiseries/LogBasis.lean,Mathlib/Tactic/ComputeAsymptotics/Multiseries/Monomial/Basic.lean,Mathlib/Tactic/ComputeAsymptotics/Multiseries/Monomial/LeadingMonomial.lean,Mathlib/Tactic/ComputeAsymptotics/Multiseries/Operations.lean,Mathlib/Tactic/ComputeAsymptotics/Multiseries/Operations/Add.lean,Mathlib/Tactic/ComputeAsymptotics/Multiseries/Operations/Basic.lean,Mathlib/Tactic/ComputeAsymptotics/Multiseries/Operations/Exp.lean,Mathlib/Tactic/ComputeAsymptotics/Multiseries/Operations/Inv.lean,Mathlib/Tactic/ComputeAsymptotics/Multiseries/Operations/Log.lean,Mathlib/Tactic/ComputeAsymptotics/Multiseries/Operations/Mul.lean,Mathlib/Tactic/ComputeAsymptotics/Multiseries/Operations/Pow.lean,Mathlib/Tactic/ComputeAsymptotics/Multiseries/Operations/Powser.lean,Mathlib/Tactic/ComputeAsymptotics/Multiseries/Trimming.lean,MathlibTest/compute_asymptotics.lean 42 23 ['github-actions', 'grunweg', 'mathlib-merge-conflicts', 'mathlib4-dependent-issues-bot', 'ocfnash', 'vasnesterov'] nobody
88-30537
2 months ago
283-31464
283 days ago
0-54
54 seconds
35671 CoolRmal
author:CoolRmal
 feat: APIs for semifinite measures This PR introduces the definition of a semifinite measure. The main theorems shown in this file are: - Sigma finite measures are semifinite. - `measure_eq_zero_of_measure_inter_finite_eq_zero`: Let `s` be a measurable set such that its intersection with any set of finite measure is null. Then `s` is null. Consequently, in order to check whether a proposition holds almost everywhere, it suffices to check it holds almost everywhere in every set with finite measure. - A measure is semifinite iff it equals to its semifinite part. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) WIP t-measure-probability 107/0 Mathlib/MeasureTheory/Measure/Typeclasses/Semifinite.lean 1 4 ['CoolRmal', 'RemyDegenne', 'github-actions'] nobody
88-22120
2 months ago
88-67684
88 days ago
0-14
14 seconds
31766 SuccessMoses
author:SuccessMoses
 feat(Topology/EMetricSpace): continuity of arc length fixes half of #31751 --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor t-topology awaiting-author merge-conflict 396/0 Mathlib.lean,Mathlib/Topology/EMetricSpace/ArcLength.lean,Mathlib/Topology/EMetricSpace/BoundedVariation.lean 3 40 ['SnirBroshi', 'SuccessMoses', 'alreadydone', 'github-actions', 'grunweg', 'j-loreaux', 'mathlib-merge-conflicts'] nobody
88-399
2 months ago
164-1269
164 days ago
2-77113
2 days
33257 NickAdfor
author:NickAdfor
 feat(Combinatorics/SimpleGraph/Bipartite): Odd Cycle Theorem (A Solution to TODO) Prove bipartite iff all cycles are even This PR formalizes the classical graph theory theorem: a graph is bipartite if and only if all its cycles have even length. Co-authored-by: Nick Adfor Co-authored-by: Yue Sun Co-authored-by: Aristotle AI --- ## Main results - `SimpleGraph.bipartite_iff_all_cycles_even` : the main equivalence theorem ## Key supporting lemmas - `SimpleGraph.even_length_iff_same_color` : parity lemma for 2-colorings - `SimpleGraph.even_length_iff_even_bypass_length` : bypass length parity - `SimpleGraph.even_cycle_length_of_path` : cycle construction lemma - `SimpleGraph.bypass_eq_nil_of_closed` : closed path properties ## Proof outline 1. For bipartite graphs: use the 2-coloring to show that in a 2-coloring, a walk has even length iff its endpoints have the same color. 2. For cycles (start = end), this forces even length. 3. For the converse: if all cycles are even, construct a 2-coloring using the `two_colorable_iff_forall_loop_even` characterization. 4. Show this coloring is valid using bypass operations and path properties. ## Technical notes - Uses `SimpleGraph.Walk` for path/cycle representation - Handles both `IsPath` and `IsCycle` predicates - Uses bypass operations (`takeUntil`, `dropUntil`, `bypass`) to analyze walks - Requires `DecidableEq V` for some lemmas - Uses classical logic for case analysis ## Reviewer notes - The proof uses induction on walks and case analysis on colorings - Some lemmas (like `even_length_iff_same_color`) could be extracted to more general locations - All theorems are in the `SimpleGraph` namespace - The `bipartite_iff_all_cycles_even` theorem provides the complete characterization t-combinatorics new-contributor awaiting-author LLM-generated merge-conflict 164/8 Mathlib/Combinatorics/SimpleGraph/Bipartite.lean,Mathlib/Combinatorics/SimpleGraph/ConcreteColorings.lean 2 80 ['IvanRenison', 'NickAdfor', 'Rida-Hamadani', 'SnirBroshi', 'YaelDillies', 'euprunin', 'github-actions', 'kmill', 'mathlib-merge-conflicts', 'mitchell-horner', 'vihdzp', 'vlad902'] YaelDillies
assignee:YaelDillies
87-75773
2 months ago
59-48061
59 days ago
52-32521
52 days
33691 kim-em
author:kim-em
 feat(scripts): add find-ci-errors.sh to diagnose widespread CI failures This PR adds a script that searches through recent failed CI workflow runs to find open PRs whose current CI contains a specific error string. Useful for diagnosing widespread CI issues affecting multiple PRs (e.g., infrastructure problems, toolchain bugs). **Usage:** ```bash # Find all PRs currently failing with a specific error ./scripts/find-ci-errors.sh "Error parsing args: cannot parse arguments" # Find PRs and automatically add please-merge-master label to trigger rebuilds ./scripts/find-ci-errors.sh --please-merge-master "cannot parse arguments" ``` The `--please-merge-master` flag skips PRs with merge conflicts, and the label is automatically removed by CI once the build completes. 🤖 Prepared with Claude Code CI delegated merge-conflict LLM-generated 196/0 scripts/README.md,scripts/find-ci-errors.sh 2 6 ['bryangingechen', 'github-actions', 'mathlib-bors', 'mathlib-merge-conflicts', 'mathlib4-merge-conflict-bot'] nobody
87-57167
2 months ago
135-76062
135 days ago
0-7055
1 hour
29776 yuanyi-350
author:yuanyi-350
 chore: refactor `ContinuousLinearMap.isOpenMap` by separating it into sublemmas The open mapping theorem in mathlib proves A ⇒ C by first proving A ⇒ B and then B ⇒ C in one theorem. In my PR, I separated it into two theorems: A ⇒ B and B ⇒ C. And now B ⇒ C is more general, with weaker assumptions than A ⇒ C. The [open mapping theorem](https://leanprover-community.github.io/mathlib4_docs/Mathlib/Analysis/Normed/Operator/Banach.html#ContinuousLinearMap.isOpenMap) in mathlib need `f` to be surjective. However, this can be weakened to the condition `h : ∃ (n : ℕ) (x : _), x ∈ interior (closure (f '' ball 0 n))` . I need this stronger formulation to prove the closed range theorem c.f. *Rudin Functional Analysis Thm 4.13* [zulip](https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/refactor.20.60ContinuousLinearMap.2EisOpenMap.60) --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) WIP t-analysis 53/33 Mathlib/Analysis/Normed/Operator/Banach.lean 1 17 ['faenuccio', 'github-actions', 'kckennylau', 'leanprover-bot', 'mathlib-merge-conflicts', 'mathlib4-merge-conflict-bot', 'themathqueen', 'yuanyi-350'] faenuccio
assignee:faenuccio
87-28097
2 months ago
243-73885
243 days ago
2-45741
2 days
35494 Timeroot
author:Timeroot
 feat(Topology/Perfect): simp frontier_singleton Add simp lemma ``` theorem frontier_singleton {X : Type*} [TopologicalSpace X] [T1Space X] [PerfectSpace X] (p : X) : frontier {p} = {p} ``` --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-topology awaiting-author 4/0 Mathlib/Topology/Perfect.lean 1 4 ['Timeroot', 'github-actions', 'urkud', 'vihdzp'] urkud
assignee:urkud
87-23576
2 months ago
87-69112
87 days ago
5-41003
5 days
34867 urkud
author:urkud
 feat(FDeriv/Comp): migrate to TVS --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) - [x] depends on: #34832 t-analysis awaiting-author 94/91 Mathlib/Analysis/Calculus/FDeriv/Comp.lean,Mathlib/Analysis/Calculus/FDeriv/ContinuousAlternatingMap.lean,Mathlib/Analysis/Calculus/FDeriv/Mul.lean 3 21 ['eric-wieser', 'github-actions', 'j-loreaux', 'leanprover-radar', 'mathlib-bors', 'mathlib-dependent-issues', 'mathlib-merge-conflicts', 'urkud'] j-loreaux
assignee:j-loreaux
87-13545
2 months ago
87-13545
87 days ago
15-63776
15 days
34419 ster-oc
author:ster-oc
 feat(RCLike): add `Continuous.re` and similar This PR adds dot notation for `re`, `im`, `conj` and `ofReal` for `Continuous`, `LipschitzWith` and `Memℓp`. Given `hf : Continuous f` it allows to use `hf.re` to express `Continuous (fun x ↦ (f x).re)`, similarly to the usual `hf.add hg`. I also can add the same features for `Summable` but I am not sure where to place them, suggestions are appreciated! --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-analysis new-contributor awaiting-author merge-conflict 186/41 Mathlib/Analysis/Normed/Group/Uniform.lean,Mathlib/Analysis/Normed/Lp/lpSpace.lean,Mathlib/Analysis/RCLike/Basic.lean 3 15 ['github-actions', 'j-loreaux', 'mathlib-merge-conflicts', 'ster-oc'] j-loreaux
assignee:j-loreaux
87-12497
2 months ago
87-12497
87 days ago
8-29654
8 days
33247 sun123zxy
author:sun123zxy
 feat(Mathlib/RingTheory/Ideal/Cotangent): dimension of cotangent spaces It is shown that the span rank of the maximal ideal of a local ring equals the dimension of the cotangent space if the maximal ideal is finitely generated. To avoid unnecessary imports, the original `Mathlib/RingTheory/Nakayama` is now moved to `Mathlib/RingTheory/Nakayama/Basic`. --- - [ ] depends on: #33359 - [ ] depends on: #33361 - [ ] depends on: #35651 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) file-removed new-contributor t-ring-theory WIP blocked-by-other-PR merge-conflict 140/27 Mathlib.lean,Mathlib/RingTheory/Ideal/Cotangent.lean,Mathlib/RingTheory/Ideal/KrullsHeightTheorem.lean,Mathlib/RingTheory/Ideal/Quotient/Operations.lean,Mathlib/RingTheory/LocalRing/Module.lean,Mathlib/RingTheory/LocalRing/Quotient.lean,Mathlib/RingTheory/Nakayama/Basic.lean,Mathlib/RingTheory/Nakayama/SpanRank.lean,Mathlib/RingTheory/Regular/RegularSequence.lean,Mathlib/RingTheory/Support.lean 10 13 ['erdOne', 'github-actions', 'mathlib-bors', 'mathlib-merge-conflicts', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot', 'sun123zxy'] nobody
86-83135
2 months ago
146-3883
146 days ago
3-72713
3 days
34759 Hagb
author:Hagb
 feat(RingTheory/MvPolynomial/MonomialOrder): add degree with `⊥` as degree of `0` `withBotDegree` is to distinguish the degree of zero polynomial from the degree of non-zero constant polynomial. `MonomialOrder.degree` of both are 0, while `withBotDegree` is `⊥` for zero polynomial and 0 for non-zero constant polynomial. `MonomialOrder.withBotDegree` is to `MonomialOrder.degree` as `Polynomial.degree` is to `Polynomial.natDegree`. It's upstreamized from https://github.com/WuProver/groebner_proj. --- `MonomialOrder.withBotDegree` is to [`MonomialOrder.degree`](https://leanprover-community.github.io/mathlib4_docs/find/?pattern=MonomialOrder.degree#doc) as [`Polynomial.degree`](https://leanprover-community.github.io/mathlib4_docs/find/?pattern=Polynomial.degree#doc) is to [`Polynomial.natDegree`](https://leanprover-community.github.io/mathlib4_docs/find/?pattern=Polynomial.natDegree#doc). It's upstreamized from [`Groebner/MonomialOrder.lean` in the repo `WuProver/groebner_proj`](https://github.com/WuProver/groebner_proj/blob/main/Groebner/MonomialOrder.lean). - [x] ~~depends on: #34755~~ - [x] depends on: #34756 - [x] depends on: #34758 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-ring-theory merge-conflict blocked-by-other-PR 346/3 Mathlib/Data/Finsupp/MonomialOrder.lean,Mathlib/RingTheory/MvPolynomial/MonomialOrder.lean 5 17 ['Hagb', 'github-actions', 'joneugster', 'mariainesdff', 'mathlib-dependent-issues', 'mathlib-merge-conflicts'] mariainesdff
assignee:mariainesdff
86-82762
2 months ago
14-28791
14 days ago
49-16573
49 days
34853 GrigorenkoPV
author:GrigorenkoPV
 feat(Combinatorics/Enumerative/Catalan): ratio of subsequent Catalan numbers --- Should I split this into 2 PRs? Otherwise it'll get squashed & be less concise. UPD: ok, I've opened #34854 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor merge-conflict 305/195 Mathlib.lean,Mathlib/Combinatorics/Enumerative/Catalan.lean,Mathlib/Combinatorics/Enumerative/Catalan/Basic.lean,Mathlib/Combinatorics/Enumerative/Catalan/Ratio.lean,Mathlib/Combinatorics/Enumerative/Catalan/Tree.lean,Mathlib/Combinatorics/Enumerative/DyckWord.lean,Mathlib/RingTheory/PowerSeries/Catalan.lean 7 6 ['github-actions', 'mathlib-merge-conflicts', 'vihdzp'] nobody
86-82758
2 months ago
105-24043
105 days ago
1-62439
1 day
35735 mkaratarakis
author:mkaratarakis
 feat(NumberTheory): analytical properties and lower bounds for Gelfond-Schneider auxiliary function This PR is the third component in the formalization of the Gelfond-Schneider Theorem (Hilbert's Seventh Problem). It connects the algebraically constructed auxiliary function `R(x)` to its analytical properties, establishing the exact order of vanishing and the fundamental lower bound on the norm of its non-zero derivative evaluation. Following the argument in Loo-Keng Hua's *Introduction to Number Theory* (Chapter 17.9, equations (4) and (5)), we define the minimal non-vanishing derivative order $r$ and scale the evaluation to an algebraic integer to compute its norm. 1. (`iteratedkDeriv_R_eq_zero` & `order_geq_n`): We verify that the coefficient vector $\eta$ (chosen via Siegel's lemma in the previous PR) forces the first $n$ derivatives of the auxiliary function $R(x)$ to vanish at the points $x \in \{1, 2, \dots, m\}$. Consequently, the analytical order of $R(x)$ at these points is at least $n$. 2. We extract $r$, the exact minimal order of vanishing of $R(x)$ among all points $1 \le l \le m$, and prove that $n \le r$. 3. We define the non-zero algebraic number $\rho = (\log \alpha)^{-r} R^{(r)}(l_0)$. 4. We prove the crucial textbook step that scaling $\rho$ by $c_1^{r+2mq}$ (formalized here as `cρ`) results in an algebraic integer in $\mathcal{O}_K$. 5. Because $c_1^{r+2mq} \rho$ is a non-zero algebraic integer, the absolute value of its norm is at least $1$. We use this to formally prove the strict lower bound on the absolute norm of the unscaled $\rho$: $|N(\rho)| > c_1^{-h(r+2mq)} > c_5^{-r}$. --- - [ ] depends on: #35734 [optional extra text] [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-number-theory new-contributor blocked-by-other-PR 1141/0 Mathlib.lean,Mathlib/NumberTheory/Transcendental/GelfondSchneider/MainAlg.lean,Mathlib/NumberTheory/Transcendental/GelfondSchneider/MainAlgSetup.lean,Mathlib/NumberTheory/Transcendental/GelfondSchneider/MainOrder.lean 4 3 ['github-actions', 'mathlib-dependent-issues'] nobody
86-70216
2 months ago
87-6272
87 days ago
0-362
6 minutes
35743 mkaratarakis
author:mkaratarakis
 feat(NumberTheory): non-vanishing derivative and norm lower bounds for Gelfond-Schneider This PR continues the formalization of the Gelfond-Schneider Theorem (Hilbert's Seventh Problem). It establishes the critical algebraic foundation for the lower bound of the auxiliary function's evaluation by isolating its first non-vanishing derivative and proving its scaled norm is strictly bounded below. Following the contradiction argument in Loo-Keng Hua's *Introduction to Number Theory* (Chapter 17.9), we verify that the evaluation at the minimal non-vanishing order $r$ yields a strictly non-zero algebraic integer when appropriately scaled. 1) Confirms that the $r$-th derivative of the auxiliary function $R(x)$ at $l_0 + 1$ is strictly non-zero, and formally translates this into the non-zero algebraic element $\rho$. 2) Formalizes the crucial algebraic step that scaling the evaluated system coefficients by $c_1^{r+2mq}$ (formalized as `cρ`) clears all denominators, resulting in a strictly non-zero algebraic integer within $\mathcal{O}_K$. 3) Concludes that because the scaled $\rho$ is a non-zero algebraic integer, its absolute norm is strictly bounded below by 1. This formalizes the core Diophantine principle that non-zero integers cannot be arbitrarily small, establishing the algebraic foundation required to oppose the complex analytic upper bound in the final contradiction step. --- - [ ] depends on: #35735 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-number-theory blocked-by-other-PR 1650/0 Mathlib.lean,Mathlib/NumberTheory/Transcendental/GelfondSchneider/MainAlg.lean,Mathlib/NumberTheory/Transcendental/GelfondSchneider/MainAlgSetup.lean,Mathlib/NumberTheory/Transcendental/GelfondSchneider/MainAnalytic.lean,Mathlib/NumberTheory/Transcendental/GelfondSchneider/MainOrder.lean 5 2 ['github-actions', 'mathlib-dependent-issues'] nobody
86-69985
2 months ago
86-69986
86 days ago
0-2369
39 minutes
35755 Vilin97
author:Vilin97
 feat(Analysis/ODE): forward Euler method convergence WIP Prove the convergence of the Forward Euler Method. This is the first theorem in most textbooks on numerical analysis for ODEs. --- The initial proof was produced by [Aristotle](https://aristotle.harmonic.fun). The code was then iteratively refined (factoring out lemmas, golfing, simplifying proofs) using Claude Code (Claude Opus 4.6). * [ ] depends on: #35753 new-contributor WIP LLM-generated merge-conflict 297/0 Mathlib.lean,Mathlib/Analysis/ODE/EulerMethod.lean,Mathlib/Topology/Algebra/Order/PiecewiseLinear.lean 4 7 ['Vilin97', 'eric-wieser', 'github-actions', 'mathlib-merge-conflicts'] nobody
86-47205
2 months ago
86-49416
86 days ago
0-674
11 minutes
25834 Rida-Hamadani
author:Rida-Hamadani
 feat(SimpleGraph): girth-diameter inequality This is a useful inequality that comes up in proofs related to Moore graphs, cages, SRGs, and so on. --- - [x] depends on: #26380 - [x] depends on: #25650 - [x] depends on: #26614 - [x] depends on: #33249 - [ ] depends on: #33506 - [ ] depends on: #35296 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) blocked-by-other-PR t-combinatorics 31/6 Mathlib/Combinatorics/SimpleGraph/Girth.lean 1 3 ['github-actions', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
86-33638
2 months ago
343-45782
343 days ago
0-28
28 seconds
33543 JovanGerb
author:JovanGerb
 feat: use `to_dual` for `HeytingAlgebra` This PR adds `to_dual` for `HeytingAlgebra`, `BiheytingAlgebra`, `GeneralizedHeytingAlgebra`. I am a bit worried about the fact that the complement operation is self-dual in a `BooleanAlgebra`, because that means that, depending on the context, `compl` needs to be translated to `hnot` or `compl`. So if we want to dualize lemmas about `BooleanAlgebra` and `compl`, we will not be able to. But I hope that the number of such lemmas is small and that they aren't often used in places that can get a `to_dual` tag (e.g. when specialized to sets, they don't need a `to_dual` tag). Aligning the `Heyting` and `Coheyting` API is kind of awkward, because they are unfortunately quite different. One reason is that the arguments of `sup`/`inf` are often swapped in the dual version, which is not compatible with `to_dual`. I've worked around this with extensive use of `to_dual none`. There are quite some lemmas that in my eyes seem unnecessary, such as `le_sup_sdiff_sup_sdiff`, but I haven't removed any in this PR. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra merge-conflict
label:t-algebra$
 195/371 Mathlib/Combinatorics/SetFamily/Kleitman.lean,Mathlib/Order/Basic.lean,Mathlib/Order/BooleanAlgebra/Basic.lean,Mathlib/Order/Disjoint.lean,Mathlib/Order/Heyting/Basic.lean,Mathlib/Order/Notation.lean,Mathlib/Order/UpperLower/Basic.lean,Mathlib/Tactic/Translate/ToDual.lean 8 13 ['JovanGerb', 'github-actions', 'mathlib-merge-conflicts', 'mathlib4-merge-conflict-bot', 'vihdzp'] bryangingechen and mattrobball
assignee:bryangingechen assignee:mattrobball
86-97
2 months ago
90-36495
90 days ago
17-21830
17 days
31595 astrainfinita
author:astrainfinita
 chore: redefine `Ideal.IsPrime` Redefine `Ideal.IsPrime` to make it correct for non-commutative cases --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra merge-conflict
label:t-algebra$
 333/100 Mathlib/Algebra/Order/Ring/Ordering/Defs.lean,Mathlib/RingTheory/DedekindDomain/Ideal/Lemmas.lean,Mathlib/RingTheory/GradedAlgebra/Radical.lean,Mathlib/RingTheory/Ideal/AssociatedPrime/Basic.lean,Mathlib/RingTheory/Ideal/Maps.lean,Mathlib/RingTheory/Ideal/Maximal.lean,Mathlib/RingTheory/Ideal/MinimalPrime/Noetherian.lean,Mathlib/RingTheory/Ideal/Oka.lean,Mathlib/RingTheory/Ideal/Operations.lean,Mathlib/RingTheory/Ideal/Over.lean,Mathlib/RingTheory/Ideal/Pointwise.lean,Mathlib/RingTheory/Ideal/Prime.lean,Mathlib/RingTheory/Ideal/Prod.lean,Mathlib/RingTheory/Ideal/Quotient/Basic.lean,Mathlib/RingTheory/Ideal/Quotient/Operations.lean,Mathlib/RingTheory/IsPrimary.lean,Mathlib/RingTheory/Localization/AtPrime/Basic.lean,Mathlib/RingTheory/Localization/Ideal.lean,Mathlib/RingTheory/Polynomial/Basic.lean,Mathlib/RingTheory/PrincipalIdealDomain.lean,Mathlib/RingTheory/Spectrum/Prime/Topology.lean,Mathlib/RingTheory/Valuation/Basic.lean 22 33 ['alreadydone', 'artie2000', 'astrainfinita', 'erdOne', 'github-actions', 'leanprover-bot', 'leanprover-radar', 'mathlib-merge-conflicts', 'mathlib4-merge-conflict-bot'] kim-em
assignee:kim-em
85-64664
2 months ago
54-61320
54 days ago
59-66521
59 days
20238 maemre
author:maemre
 feat(Computability/DFA): Closure of regular languages under some set operations This shows that regular languages are closed under complement and intersection by constructing DFAs for them. --- Closure under all other operations will be proved when someone adds the proof for DFA<->regular expression equivalence, so they are not part of this PR. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor t-computability merge-conflict awaiting-author awaiting-zulip 159/0 Mathlib/Computability/DFA.lean,Mathlib/Computability/Language.lean 2 60 ['EtienneC30', 'YaelDillies', 'github-actions', 'maemre', 'mathlib4-merge-conflict-bot', 'meithecatte', 'urkud'] nobody
85-45140
2 months ago
431-23079
431 days ago
48-67492
48 days
22361 rudynicolop
author:rudynicolop
 feat(Computability/NFA): nfa closure properties Add the closure properties union, intersection and reversal for NFA. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor t-computability merge-conflict awaiting-author awaiting-zulip 218/2 Mathlib/Computability/Language.lean,Mathlib/Computability/NFA.lean 2 91 ['EtienneC30', 'b-mehta', 'ctchou', 'github-actions', 'leanprover-community-bot-assistant', 'meithecatte', 'rudynicolop'] nobody
85-45124
2 months ago
382-27018
382 days ago
39-60525
39 days
32825 erdOne
author:erdOne
 perf(RingTheory): `attribute [irreducible] KaehlerDifferential` --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) awaiting-author t-ring-theory 5/1 Mathlib/Algebra/Category/ModuleCat/Differentials/Basic.lean,Mathlib/AlgebraicGeometry/Morphisms/FormallyUnramified.lean,Mathlib/RingTheory/Kaehler/Basic.lean 3 7 ['erdOne', 'github-actions', 'jcommelin', 'leanprover-radar', 'robin-carlier'] nobody
85-29970
2 months ago
126-33088
126 days ago
1-44258
1 day
30872 rudynicolop
author:rudynicolop
 feat(Computability/NFA): NFA closure under concatenation This PR proves that regular languages are closed under concatenation via a direct construction on `NFA`s without `εNFA` nor ε-transitions. The main new definitions and results include: - `M1.concat M2`, the concatenation of `NFA`s `M1` and `M2`, a direct construction without ε-transitions. - Theorem `accepts_concat : (M1.concat M2).accepts = M1.accepts * M2.accepts`, showing the correctness of the construction. - Theorem `IsRegular.mul`, showing that regular languages are closed under concatenation. --- - [x] depends on: #31038 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-computability new-contributor awaiting-author 104/7 Mathlib/Computability/NFA.lean 1 67 ['YaelDillies', 'ctchou', 'eric-wieser', 'github-actions', 'lambda-fairy', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot', 'rudynicolop'] nobody
85-24995
2 months ago
113-8404
113 days ago
59-63565
59 days
29354 themathqueen
author:themathqueen
 refactor(Algebra/Algebra/Equiv): allow for non-unital `AlgEquiv` This refactors `AlgEquiv` to allow for non-unital algebras. More specifically, we weaken the type class assumptions from: ```lean structure AlgEquiv (R A B : Type*) [CommSemiring R] [Semiring A] [Semiring B] [Algebra R A] [Algebra R B] ``` to ```lean structure AlgEquiv (R A B : Type*) [Add A] [Add B] [Mul A] [Mul B] [SMul R A] [SMul R B] ``` Instead of a `commutes'` field, we now have a `map_smul'` field. We also include a definition `AlgEquiv.ofCommutes` which takes in a `RingEquiv` and a `commutes'` field to match before and for convenience. `StarAlgEquiv` now extends `AlgEquiv`. We also generalize a few files to allow for non-unital. I suspect there are a few more things to generalize, but will leave this for later. Co-authored-by: Jireh Loreaux --- Zulip: https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/Refactoring.20.60AlgEquiv.60.20.28.2329354.29/with/575365792 Revives #8686. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra awaiting-author merge-conflict
label:t-algebra$
 703/595 Mathlib/Algebra/Algebra/Equiv.lean,Mathlib/Algebra/Algebra/Opposite.lean,Mathlib/Algebra/Algebra/Pi.lean,Mathlib/Algebra/Algebra/Prod.lean,Mathlib/Algebra/Algebra/Subalgebra/Basic.lean,Mathlib/Algebra/Algebra/Subalgebra/MulOpposite.lean,Mathlib/Algebra/Algebra/Tower.lean,Mathlib/Algebra/Algebra/TransferInstance.lean,Mathlib/Algebra/Category/AlgCat/Basic.lean,Mathlib/Algebra/Category/CommAlgCat/Basic.lean,Mathlib/Algebra/Category/CommAlgCat/FiniteType.lean,Mathlib/Algebra/Category/Ring/Constructions.lean,Mathlib/Algebra/DualQuaternion.lean,Mathlib/Algebra/MonoidAlgebra/Basic.lean,Mathlib/Algebra/MonoidAlgebra/ToDirectSum.lean,Mathlib/Algebra/MvPolynomial/Equiv.lean,Mathlib/Algebra/MvPolynomial/Rename.lean,Mathlib/Algebra/Polynomial/AlgebraMap.lean,Mathlib/Algebra/Polynomial/Taylor.lean,Mathlib/Algebra/Quaternion.lean,Mathlib/Algebra/SkewMonoidAlgebra/Lift.lean,Mathlib/Algebra/Star/Free.lean,Mathlib/Algebra/Star/StarAlgHom.lean,Mathlib/Algebra/Star/UnitaryStarAlgAut.lean,Mathlib/AlgebraicGeometry/Normalization.lean,Mathlib/AlgebraicGeometry/Stalk.lean,Mathlib/Analysis/CStarAlgebra/CStarMatrix.lean,Mathlib/Analysis/CStarAlgebra/Spectrum.lean,Mathlib/Analysis/Normed/Algebra/GelfandFormula.lean,Mathlib/Analysis/Normed/Algebra/Spectrum.lean,Mathlib/Analysis/Normed/Algebra/UnitizationL1.lean,Mathlib/Analysis/Normed/Lp/LpEquiv.lean,Mathlib/Analysis/Normed/Lp/Matrix.lean,Mathlib/Analysis/Normed/Module/Basic.lean,Mathlib/Analysis/Normed/Operator/ContinuousAlgEquiv.lean,Mathlib/Analysis/RCLike/Basic.lean,Mathlib/Data/Matrix/Basic.lean,Mathlib/Data/Matrix/Composition.lean,Mathlib/Data/Matrix/DualNumber.lean,Mathlib/FieldTheory/Fixed.lean,Mathlib/FieldTheory/Galois/Basic.lean,Mathlib/FieldTheory/Galois/Notation.lean,Mathlib/FieldTheory/Galois/Profinite.lean,Mathlib/FieldTheory/IntermediateField/Adjoin/Algebra.lean,Mathlib/FieldTheory/IntermediateField/Adjoin/Basic.lean,Mathlib/FieldTheory/IntermediateField/Basic.lean,Mathlib/FieldTheory/KummerExtension.lean,Mathlib/FieldTheory/Normal/Basic.lean,Mathlib/FieldTheory/PrimitiveElement.lean,Mathlib/FieldTheory/RatFunc/Basic.lean,Mathlib/FieldTheory/Separable.lean,Mathlib/LinearAlgebra/CliffordAlgebra/BaseChange.lean,Mathlib/LinearAlgebra/CliffordAlgebra/Conjugation.lean,Mathlib/LinearAlgebra/Complex/Module.lean,Mathlib/LinearAlgebra/FreeAlgebra.lean,Mathlib/LinearAlgebra/Matrix/Basis.lean,Mathlib/LinearAlgebra/Matrix/Charpoly/Coeff.lean,Mathlib/LinearAlgebra/Matrix/Charpoly/LinearMap.lean,Mathlib/LinearAlgebra/Matrix/Reindex.lean,Mathlib/LinearAlgebra/Matrix/ToLin.lean,Mathlib/LinearAlgebra/Matrix/Transvection.lean,Mathlib/LinearAlgebra/Matrix/Unique.lean,Mathlib/LinearAlgebra/TensorProduct/Graded/Internal.lean,Mathlib/LinearAlgebra/TensorProduct/Subalgebra.lean,Mathlib/LinearAlgebra/Trace.lean,Mathlib/NumberTheory/NumberField/Cyclotomic/Ideal.lean,Mathlib/NumberTheory/NumberField/Discriminant/Defs.lean,Mathlib/NumberTheory/NumberField/Ideal/KummerDedekind.lean,Mathlib/NumberTheory/Padics/HeightOneSpectrum.lean,Mathlib/RepresentationTheory/Intertwining.lean,Mathlib/RingTheory/AdicCompletion/Algebra.lean,Mathlib/RingTheory/AdjoinRoot.lean,Mathlib/RingTheory/Algebraic/MvPolynomial.lean,Mathlib/RingTheory/Artinian/Module.lean,Mathlib/RingTheory/Bialgebra/Equiv.lean,Mathlib/RingTheory/Congruence/Hom.lean,Mathlib/RingTheory/DedekindDomain/Different.lean,Mathlib/RingTheory/Etale/Field.lean,Mathlib/RingTheory/Etale/QuasiFinite.lean,Mathlib/RingTheory/Etale/StandardEtale.lean,Mathlib/RingTheory/Finiteness/Basic.lean,Mathlib/RingTheory/Finiteness/Descent.lean,Mathlib/RingTheory/Flat/Equalizer.lean,Mathlib/RingTheory/FractionalIdeal/Operations.lean,Mathlib/RingTheory/Frobenius.lean,Mathlib/RingTheory/GradedAlgebra/Basic.lean,Mathlib/RingTheory/HahnSeries/PowerSeries.lean,Mathlib/RingTheory/Ideal/Operations.lean,Mathlib/RingTheory/Ideal/Over.lean,Mathlib/RingTheory/Ideal/Quotient/Operations.lean,Mathlib/RingTheory/IntegralClosure/IntegrallyClosed.lean,Mathlib/RingTheory/Invariant/Basic.lean,Mathlib/RingTheory/Invariant/Profinite.lean,Mathlib/RingTheory/IsTensorProduct.lean,Mathlib/RingTheory/Jacobson/Ring.lean,Mathlib/RingTheory/Kaehler/Basic.lean,Mathlib/RingTheory/LaurentSeries.lean,Mathlib/RingTheory/Localization/Away/AdjoinRoot.lean,Mathlib/RingTheory/Localization/Basic.lean,Mathlib/RingTheory/Localization/FractionRing.lean 130 73 ['SnirBroshi', 'fpvandoorn', 'github-actions', 'jcommelin', 'leanprover-bot', 'leanprover-radar', 'mathlib-merge-conflicts', 'mathlib4-merge-conflict-bot', 'themathqueen'] joelriou
assignee:joelriou
85-22491
2 months ago
177-28927
177 days ago
65-65843
65 days
35163 CoolRmal
author:CoolRmal
 feat(Topology): comparison of two Hausdorff topologies The main theorem proved in this PR is `CompactSpace.eq_of_le_compact_t2`, which says that if we have two Hausdorff topologies `s, t` on `X`, and if `t` is finer than `s` and `X` is compact under `t`, then `s = t`. I also proved some variant of this lemma. The motivations I have in mind are some applications to the theory of topological vector spaces, where we often have to compare two Hausdorff topologies. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-topology awaiting-author 24/0 Mathlib/Topology/Homeomorph/Lemmas.lean 1 7 ['CoolRmal', 'dagurtomas', 'github-actions', 'j-loreaux', 'plp127'] nobody
85-6434
2 months ago
85-6434
85 days ago
14-53724
14 days
35746 ThomasMoulin-hub
author:ThomasMoulin-hub
 feat (Algebra/Endomorphisms): add kernels lemma from the missing undergraduate mathematics in mathlib Add helper theorem inside Mathlib.Algebra.Polynomial.Smeval.lean and created a new file Mathlib/RingTheory/Polynomial/KernelDecomposition.lean that implements the kernels lemma from the missing undergraduate mathematics in mathlib list. This file also contains intermediate results needed for the main lemma. new-contributor 75/0 Mathlib/Algebra/Polynomial/Smeval.lean,Mathlib/RingTheory/Polynomial/Basic.lean 2 2 ['github-actions'] nobody
84-82964
2 months ago
unknown
0-0
0 seconds
35825 mattrobball
author:mattrobball
 chore: unbundle `ENormed*` from algebra This is a test PR. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict 3609/2536 .claude/worktrees/snazzy-waddling-crescent,Archive/Hairer.lean,Archive/Imo/Imo2001Q5.lean,Archive/Imo/Imo2019Q2.lean,Archive/Wiedijk100Theorems/HeronsFormula.lean,CLAUDE.md,Mathlib/Algebra/Module/ZLattice/Basic.lean,Mathlib/Algebra/Module/ZLattice/Covolume.lean,Mathlib/Algebra/Module/ZLattice/Summable.lean,Mathlib/Analysis/Analytic/Basic.lean,Mathlib/Analysis/Analytic/CPolynomial.lean,Mathlib/Analysis/Analytic/CPolynomialDef.lean,Mathlib/Analysis/Analytic/ChangeOrigin.lean,Mathlib/Analysis/Analytic/Composition.lean,Mathlib/Analysis/Analytic/Constructions.lean,Mathlib/Analysis/Analytic/ConvergenceRadius.lean,Mathlib/Analysis/Analytic/Inverse.lean,Mathlib/Analysis/Analytic/IsolatedZeros.lean,Mathlib/Analysis/Analytic/IteratedFDeriv.lean,Mathlib/Analysis/Analytic/Linear.lean,Mathlib/Analysis/Analytic/Order.lean,Mathlib/Analysis/Analytic/Polynomial.lean,Mathlib/Analysis/Analytic/RadiusLiminf.lean,Mathlib/Analysis/Analytic/Uniqueness.lean,Mathlib/Analysis/Analytic/WithLp.lean,Mathlib/Analysis/Analytic/Within.lean,Mathlib/Analysis/Asymptotics/AsymptoticEquivalent.lean,Mathlib/Analysis/Asymptotics/Completion.lean,Mathlib/Analysis/Asymptotics/Defs.lean,Mathlib/Analysis/Asymptotics/Lemmas.lean,Mathlib/Analysis/Asymptotics/SpecificAsymptotics.lean,Mathlib/Analysis/Asymptotics/TVS.lean,Mathlib/Analysis/Asymptotics/Theta.lean,Mathlib/Analysis/BoundedVariation.lean,Mathlib/Analysis/BoxIntegral/Basic.lean,Mathlib/Analysis/BoxIntegral/DivergenceTheorem.lean,Mathlib/Analysis/BoxIntegral/Integrability.lean,Mathlib/Analysis/BoxIntegral/Partition/Additive.lean,Mathlib/Analysis/BoxIntegral/Partition/Measure.lean,Mathlib/Analysis/CStarAlgebra/Basic.lean,Mathlib/Analysis/CStarAlgebra/CStarMatrix.lean,Mathlib/Analysis/CStarAlgebra/ContinuousLinearMap.lean,Mathlib/Analysis/CStarAlgebra/Matrix.lean,Mathlib/Analysis/CStarAlgebra/Module/Constructions.lean,Mathlib/Analysis/CStarAlgebra/Module/Defs.lean,Mathlib/Analysis/Calculus/AddTorsor/AffineMap.lean,Mathlib/Analysis/Calculus/AddTorsor/Coord.lean,Mathlib/Analysis/Calculus/BumpFunction/Basic.lean,Mathlib/Analysis/Calculus/BumpFunction/Convolution.lean,Mathlib/Analysis/Calculus/BumpFunction/FiniteDimension.lean,Mathlib/Analysis/Calculus/BumpFunction/InnerProduct.lean,Mathlib/Analysis/Calculus/BumpFunction/Normed.lean,Mathlib/Analysis/Calculus/BumpFunction/SmoothApprox.lean,Mathlib/Analysis/Calculus/Conformal/InnerProduct.lean,Mathlib/Analysis/Calculus/Conformal/NormedSpace.lean,Mathlib/Analysis/Calculus/ContDiff/Basic.lean,Mathlib/Analysis/Calculus/ContDiff/Bounds.lean,Mathlib/Analysis/Calculus/ContDiff/CPolynomial.lean,Mathlib/Analysis/Calculus/ContDiff/Comp.lean,Mathlib/Analysis/Calculus/ContDiff/Convolution.lean,Mathlib/Analysis/Calculus/ContDiff/Defs.lean,Mathlib/Analysis/Calculus/ContDiff/Deriv.lean,Mathlib/Analysis/Calculus/ContDiff/FTaylorSeries.lean,Mathlib/Analysis/Calculus/ContDiff/FaaDiBruno.lean,Mathlib/Analysis/Calculus/ContDiff/FiniteDimension.lean,Mathlib/Analysis/Calculus/ContDiff/Operations.lean,Mathlib/Analysis/Calculus/ContDiff/RCLike.lean,Mathlib/Analysis/Calculus/ContDiff/RestrictScalars.lean,Mathlib/Analysis/Calculus/ContDiff/WithLp.lean,Mathlib/Analysis/Calculus/ContDiffHolder/Pointwise.lean,Mathlib/Analysis/Calculus/DSlope.lean,Mathlib/Analysis/Calculus/Deriv/Abs.lean,Mathlib/Analysis/Calculus/Deriv/Add.lean,Mathlib/Analysis/Calculus/Deriv/AffineMap.lean,Mathlib/Analysis/Calculus/Deriv/Basic.lean,Mathlib/Analysis/Calculus/Deriv/Comp.lean,Mathlib/Analysis/Calculus/Deriv/CompMul.lean,Mathlib/Analysis/Calculus/Deriv/Inv.lean,Mathlib/Analysis/Calculus/Deriv/Inverse.lean,Mathlib/Analysis/Calculus/Deriv/Linear.lean,Mathlib/Analysis/Calculus/Deriv/MeanValue.lean,Mathlib/Analysis/Calculus/Deriv/Mul.lean,Mathlib/Analysis/Calculus/Deriv/Prod.lean,Mathlib/Analysis/Calculus/Deriv/Shift.lean,Mathlib/Analysis/Calculus/Deriv/Slope.lean,Mathlib/Analysis/Calculus/Deriv/Star.lean,Mathlib/Analysis/Calculus/Deriv/Support.lean,Mathlib/Analysis/Calculus/Deriv/ZPow.lean,Mathlib/Analysis/Calculus/DiffContOnCl.lean,Mathlib/Analysis/Calculus/DifferentialForm/Basic.lean,Mathlib/Analysis/Calculus/DifferentialForm/VectorField.lean,Mathlib/Analysis/Calculus/FDeriv/Add.lean,Mathlib/Analysis/Calculus/FDeriv/Affine.lean,Mathlib/Analysis/Calculus/FDeriv/Analytic.lean,Mathlib/Analysis/Calculus/FDeriv/Basic.lean,Mathlib/Analysis/Calculus/FDeriv/Bilinear.lean,Mathlib/Analysis/Calculus/FDeriv/Comp.lean,Mathlib/Analysis/Calculus/FDeriv/CompCLM.lean,Mathlib/Analysis/Calculus/FDeriv/ContinuousAlternatingMap.lean,Mathlib/Analysis/Calculus/FDeriv/ContinuousMultilinearMap.lean 687 5 ['leanprover-radar', 'mathlib-bors', 'mattrobball'] nobody
84-82813
2 months ago
85-2203
85 days ago
0-11
11 seconds
34932 erdOne
author:erdOne
 feat(AlgebraicGeometry): formally etale morphisms --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebraic-geometry merge-conflict delegated 163/12 Mathlib.lean,Mathlib/AlgebraicGeometry/Morphisms/Etale.lean,Mathlib/AlgebraicGeometry/Morphisms/FormallyEtale.lean,Mathlib/AlgebraicGeometry/Morphisms/RingHomProperties.lean,Mathlib/RingTheory/RingHom/Etale.lean 5 17 ['chrisflav', 'erdOne', 'github-actions', 'joneugster', 'mathlib-bors', 'mathlib-merge-conflicts', 'ocfnash'] nobody
84-74265
2 months ago
86-82754
86 days ago
11-40391
11 days
23929 meithecatte
author:meithecatte
 feat(Computability/NFA): improve bound on pumping lemma --- - [x] depends on: #25321 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-computability awaiting-zulip new-contributor awaiting-author 101/10 Mathlib/Computability/EpsilonNFA.lean,Mathlib/Computability/NFA.lean 2 42 ['YaelDillies', 'dagurtomas', 'github-actions', 'leanprover-community-bot-assistant', 'mathlib4-dependent-issues-bot', 'meithecatte'] nobody
84-65153
2 months ago
349-8052
349 days ago
34-10092
34 days
35128 DAE123456
author:DAE123456
 feat : Define anti_pascal --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra new-contributor awaiting-author
label:t-algebra$
 81/0 Archive.lean,Archive/Imo/Imo2018Q3.lean 2 5 ['DAE123456', 'github-actions', 'grunweg', 'vihdzp'] nobody
84-62679
2 months ago
100-30843
100 days ago
0-1613
26 minutes
35863 CBirkbeck
author:CBirkbeck
 Nagell lutz --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict 2005/234 Mathlib.lean,Mathlib/Algebra/Polynomial/Bivariate.lean,Mathlib/AlgebraicGeometry/EllipticCurve/Affine/Point.lean,Mathlib/AlgebraicGeometry/EllipticCurve/DivisionPolynomial/Basic.lean,Mathlib/AlgebraicGeometry/EllipticCurve/DivisionPolynomial/ZSMul.lean,Mathlib/AlgebraicGeometry/EllipticCurve/Universal.lean,Mathlib/NumberTheory/EllipticDivisibilitySequence.lean 7 0 [] nobody
84-39747
2 months ago
unknown
0-0
0 seconds
8102 miguelmarco
author:miguelmarco
 feat(Tactic): add `unify_denoms` and `collect_signs` tactics This PR adds four new tactics: - `unify_denoms` tries to put expressions with several divisions in a form with only one division. In the case of fields, it works similarly to `field_simp`, but if the hypothesis about denominators being nonzero are not present, it assumes them, and leaves them as new goals to prove. In that sense, it is an "unsafe" tactic (but can be useful nevertheless, for example when you can't find which exact hypothesis is missing). It also works with expressions of naturals and Euclidean domains, assuming the corresponding hypothesis about the denominators dividing the numerators. - `unify_denoms!` extends `unify_denoms` to work with (in)equalities, assuming also that the denominators, once in normal form, are positive. - `collect_signs` works similarly with expressions using sums and substractions: it tries to put them in a form of one sum minus other sum. In the case of working with naturals, it assumes that we never substract a bigger number from a smaller one. Both are implemented essentially as a macro that combines several rewriting rules. Some new lemmas with the corresponding rules are added. --- please-adopt new-contributor merge-conflict modifies-tactic-syntax good first issue t-meta 407/0 Mathlib.lean,Mathlib/Algebra/EuclideanDomain/Basic.lean,Mathlib/Tactic.lean,Mathlib/Tactic/CollectSigns.lean,Mathlib/Tactic/UnifyDenoms.lean,MathlibTest/unify_denoms.lean,scripts/noshake.json 7 55 ['Paul-Lez', 'YaelDillies', 'github-actions', 'joneugster', 'kbuzzard', 'mathlib4-merge-conflict-bot', 'miguelmarco'] nobody
84-29451
2 months ago
373-11923
373 days ago
17-14109
17 days
35603 2500223210-max
author:2500223210-max
 feat(GroupTheory/Frattini): add more theorems Add some contents about frattini subgroup into Mathlib GroupTheory Frattini.lean,including * (convenient lemma)A subgroup contained in all maximal subgroup is contained in the FRattini subgroup * A subgroup (say H) has a proper complement (meaning for some proper subgroup K, K and H generate the whole group)if and only if it is not contained in the Frattini subgroup. * A group is cyclic iff its Frattini factor(the quotient group wrt Frattini subgroup) is cyclic. * The Frattini factor of a finite p-group is elementary abelian(that is,an abelian group G with Gᵖ={1}) * A finite p-group has trivial Frattini subgroup iff the group is elementary abelian. * Burnside theorem of Frattini factor of finite p-group. --- new-contributor t-group-theory large-import awaiting-author 764/1 Mathlib/GroupTheory/Frattini.lean 1 3 ['github-actions', 'tb65536'] nobody
84-27132
2 months ago
84-27132
84 days ago
5-73876
5 days
35868 Raph-DG
author:Raph-DG
 feat(Topology): add variant of the sheaf condition which assumes non triviality of the cover In this PR we add in a variant of the sheaf condition which assumes the cover present in the sheaf condition is nontrivial in the sense that the indexing type is nonempty and the values of the presheaf on each element of the cover are nonempty. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-topology WIP 78/0 Mathlib/Topology/Sheaves/SheafCondition/UniqueGluing.lean 1 5 ['Raph-DG', 'chrisflav', 'github-actions'] PatrickMassot
assignee:PatrickMassot
84-26605
2 months ago
21-48363
21 days ago
27-25540
27 days
35078 grunweg
author:grunweg
 feat: immersed points Define immersed points of a (differentiable) map between manifolds, and prove that immersed points compose. Future PRs show that `x` is an immersed point of `f` if and only if `f` is an immersion at `x`: thus, proving the composition of immersed points (which follows immediately from the chain rule) implies the composition of immersions (which is not obvious from their definition. From the path towards immersions, embeddings and submanifolds. --- - [x] depends on: #35057 - [x] depends on: #35284 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-differential-geometry awaiting-author 171/1 Mathlib.lean,Mathlib/Analysis/Normed/Module/ContinuousInverse.lean,Mathlib/Geometry/Manifold/ImmersedPoint.lean,Mathlib/Geometry/Manifold/LocalDiffeomorph.lean 4 4 ['github-actions', 'mathlib-dependent-issues', 'mathlib-merge-conflicts'] nobody
84-21105
2 months ago
101-37702
101 days ago
0-6
6 seconds
34626 grunweg
author:grunweg
 feat: analytification of schemes (affine case) This branch is for tracking purposes; the code in this branch will take a while to get merged into mathlib. The affine case depends on the regular value theorem (which is a master's thesis I am supervising now), the general case will also require gluing manifolds (another thesis). Merging both before the end of this year is an optimistic estimate. That said, pieces and pre-requisites (such as, submersions, their composition properties and the definition of submanifolds) can and hopefully get merged much sooner! --- - [ ] depends on: #28796 - [ ] depends on: #26087 - [x] depends on: #34991 - [x] depends on: #35057 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict WIP t-differential-geometry blocked-by-other-PR please-merge-master 3322/50 Mathlib.lean,Mathlib/Analysis/Calculus/ContDiff/Basic.lean,Mathlib/Analysis/Normed/Module/ContinuousLeftInverse.lean,Mathlib/Analysis/Normed/Module/ContinuousRightInverse.lean,Mathlib/Analysis/Normed/Module/Splits.lean,Mathlib/Analysis/Normed/Operator/Banach.lean,Mathlib/Geometry/Manifold/ContMDiff/Atlas.lean,Mathlib/Geometry/Manifold/Immersion.lean,Mathlib/Geometry/Manifold/IsManifold/ExtChartAt.lean,Mathlib/Geometry/Manifold/LocalDiffeomorph.lean,Mathlib/Geometry/Manifold/LocalSourceTargetProperty.lean,Mathlib/Geometry/Manifold/MSplits.lean,Mathlib/Geometry/Manifold/RegularPoint.lean,Mathlib/Geometry/Manifold/RegularValueTheorem.lean,Mathlib/Geometry/Manifold/Scheme.lean,Mathlib/Geometry/Manifold/SliceModel.lean,Mathlib/Geometry/Manifold/SmoothEmbedding.lean,Mathlib/Geometry/Manifold/Submanifold.lean,Mathlib/Geometry/Manifold/Submersion.lean,Mathlib/Topology/Algebra/Module/LinearMap.lean 20 2 ['github-actions', 'mathlib4-dependent-issues-bot'] nobody
84-21074
2 months ago
112-1199
112 days ago
0-1
1 second
33791 PhoenixIra
author:PhoenixIra
 feat: Generalization of FixedPointApproximants to CompletePartialOrder --- This PR provides a generalization of FixedPointApproximants to CompletePartialOrder. Not every theorem can be generalized, as sometimes we require additional conditions (namely `x ≤ f x`) in order to guarantee that the set is directed and thus the supremum is well-defined. This is not necessary in a CompleteLattice. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor t-order merge-conflict 223/100 Mathlib/Order/CompletePartialOrder.lean,Mathlib/SetTheory/Ordinal/FixedPointApproximants.lean 2 21 ['PhoenixIra', 'github-actions', 'mathlib-merge-conflicts', 'vihdzp'] PhoenixIra and vihdzp
assignee:PhoenixIra assignee:vihdzp
84-5436
2 months ago
84-5436
84 days ago
44-16098
44 days
35674 astrainfinita
author:astrainfinita
 refactor: use `OrderSupSet` in `ConditionallyCompleteLattice` --- - [x] depends on: #35774 - [x] depends on: #37079 - [ ] depends on: #37082 - [ ] depends on: #38328 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-order blocked-by-other-PR merge-conflict 421/265 Mathlib/Algebra/Order/Nonneg/Lattice.lean,Mathlib/Algebra/Tropical/Lattice.lean,Mathlib/Analysis/Seminorm.lean,Mathlib/Data/Int/ConditionallyCompleteOrder.lean,Mathlib/Data/NNReal/Defs.lean,Mathlib/Data/Nat/Lattice.lean,Mathlib/Data/Real/Archimedean.lean,Mathlib/MeasureTheory/OuterMeasure/Induced.lean,Mathlib/Order/Bounds/Basic.lean,Mathlib/Order/Bounds/Defs.lean,Mathlib/Order/CompleteLattice/Basic.lean,Mathlib/Order/CompleteLattice/Defs.lean,Mathlib/Order/CompleteLatticeIntervals.lean,Mathlib/Order/ConditionallyCompleteLattice/Basic.lean,Mathlib/Order/ConditionallyCompleteLattice/Defs.lean,Mathlib/Order/ConditionallyCompleteLattice/Indexed.lean,Mathlib/Order/Copy.lean,Mathlib/Order/LiminfLimsup.lean,Mathlib/Order/SetNotation.lean,Mathlib/Order/SuccPred/CompleteLinearOrder.lean,Mathlib/SetTheory/Cardinal/Order.lean,Mathlib/SetTheory/Ordinal/Basic.lean,Mathlib/SetTheory/Ordinal/Exponential.lean,Mathlib/SetTheory/Ordinal/Family.lean,Mathlib/Topology/NoetherianSpace.lean,Mathlib/Topology/UniformSpace/OfCompactT2.lean 20 8 ['github-actions', 'mathlib-dependent-issues', 'mathlib-merge-conflicts'] nobody
84-5186
2 months ago
unknown
0-0
0 seconds
35669 SnirBroshi
author:SnirBroshi
 feat(Mathlib/Data/Finset/Mex): `sInf sᶜ ≤ s.encard` --- It's in a separate file because I couldn't find a sensible place with the required imports, not because "mex" is particularly interesting. - [x] depends on: #35821 - [ ] depends on: #35822 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-order blocked-by-other-PR 127/2 Mathlib.lean,Mathlib/Data/Finset/Mex.lean,Mathlib/Order/ConditionallyCompleteLattice/Basic.lean,Mathlib/Order/ConditionallyCompleteLattice/Finset.lean 6 13 ['SnirBroshi', 'github-actions', 'mathlib-dependent-issues', 'mathlib-merge-conflicts', 'vihdzp'] nobody
84-3971
2 months ago
85-17764
85 days ago
3-47086
3 days
35857 AlexeyMilovanov
author:AlexeyMilovanov
 feat(Logic.Equiv.BijectiveBase2): add bijective base-2 numeration This PR introduces a formalization of the bijective base-2 numeration system. Unlike standard binary representation, bijective base-2 avoids the "leading zeros" problem, providing a strict mathematical bijection between natural numbers (`ℕ`) and lists of booleans (`List Bool`). **Main additions:** * `Equiv.BijectiveBase2.toBits`: Encodes `ℕ` to `List Bool`. * `Equiv.BijectiveBase2.ofBits`: Decodes `List Bool` to `ℕ`. * `equivBijectiveBase2`: The formal `ℕ ≃ List Bool` equivalence. --- Zulip: [#PR reviews > PR #35857: Bijective Base-2 Numeration](https://leanprover.zulipchat.com/#narrow/channel/144837-PR-reviews/topic/PR.20.2335857.3A.20Bijective.20Base-2.20Numeration/with/576336540) Zulip: [#batteries > Upstreaming Nat.Bits](https://leanprover.zulipchat.com/#narrow/channel/348111-batteries/topic/Upstreaming.20Nat.2EBits/with/580736051) *(Note: This replaces my previously closed PR to avoid the terminology clash between "Dyadic" and dyadic rationals. The namespace and definitions have been updated accordingly).* *(Note: Used AI to assist with standardizing proof structures).* t-logic new-contributor LLM-generated blocked-by-batt-PR 95/0 Mathlib.lean,Mathlib/Logic/Equiv/ListNatBijective.lean 2 6 ['AlexeyMilovanov', 'SnirBroshi', 'github-actions', 'joneugster'] nobody
84-1507
2 months ago
56-37730
56 days ago
27-59600
27 days
35423 Rob23oba
author:Rob23oba
 feat: add congruence lemmas for `Function.update` and `Pi.single` Adds `simp` congruence lemmas to `Function.update` and `Pi.single` that are specialized for the non-dependent case. See also [#mathlib4 > Simp fails to apply with `Function.update`](https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/Simp.20fails.20to.20apply.20with.20.60Function.2Eupdate.60/with/573889929). --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra awaiting-author merge-conflict
label:t-algebra$
 29/6 Mathlib/Algebra/Notation/Pi/Basic.lean,Mathlib/Logic/Function/Basic.lean,Mathlib/NumberTheory/ModularForms/QExpansion.lean,Mathlib/RepresentationTheory/Tannaka.lean,Mathlib/Topology/Algebra/InfiniteSum/Basic.lean 5 11 ['Rob23oba', 'eric-wieser', 'github-actions', 'joelriou', 'joneugster', 'loefflerd', 'mathlib-merge-conflicts'] joelriou
assignee:joelriou
83-81542
2 months ago
58-56221
58 days ago
36-20932
36 days
35605 j-loreaux
author:j-loreaux
 feat: transfer instances of `ContinuousFunctionalCalculus` to type synonyms with weaker topologies --- - [ ] depends on: #35551 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-analysis 730/209 Mathlib/Analysis/CStarAlgebra/ContinuousFunctionalCalculus/Basic.lean,Mathlib/Analysis/CStarAlgebra/ContinuousFunctionalCalculus/Instances.lean,Mathlib/Analysis/CStarAlgebra/ContinuousFunctionalCalculus/Isometric.lean,Mathlib/Analysis/CStarAlgebra/ContinuousFunctionalCalculus/NonUnital.lean,Mathlib/Analysis/CStarAlgebra/ContinuousFunctionalCalculus/Range.lean,Mathlib/Analysis/CStarAlgebra/ContinuousFunctionalCalculus/Restrict.lean,Mathlib/Analysis/CStarAlgebra/ContinuousFunctionalCalculus/Transfer.lean,Mathlib/Analysis/CStarAlgebra/ContinuousFunctionalCalculus/Unital.lean,Mathlib/Analysis/Matrix/HermitianFunctionalCalculus.lean,Mathlib/Analysis/Normed/Algebra/Unitization.lean,Mathlib/Analysis/SpecialFunctions/ContinuousFunctionalCalculus/ExpLog/Basic.lean,Mathlib/Topology/CompactOpen.lean,Mathlib/Topology/ContinuousMap/ContinuousMapZero.lean 13 3 ['github-actions', 'mathlib-dependent-issues', 'mathlib-merge-conflicts'] nobody
83-80934
2 months ago
87-56794
87 days ago
0-39286
10 hours
35610 IvanRenison
author:IvanRenison
 feat(Data/Fin): add several lemmas about subtraction of `Fin.{castLT, castAdd, castSucc, castPred}` --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-data 79/0 Mathlib/Data/Fin/Basic.lean,Mathlib/Data/Fin/SuccPred.lean 2 13 ['IvanRenison', 'chrisflav', 'github-actions', 'robin-carlier', 'wwylele'] eric-wieser
assignee:eric-wieser
83-75793
2 months ago
20-85819
20 days ago
86-30145
86 days
25170 eric-wieser
author:eric-wieser
 refactor: make basis computable I claim that in the long run, `Basis.repr` should be a `DFinsupp` not `Finsupp`, so that it is computable. To make this change incrementally, we can store a `DFinsupp` internally today, and keep `repr` and `ofRepr` working with finsupp. This at least would allow building a large basis object, and then using `repr'` to compute with it. The cost of this intermediate state is a loss of many defeqs. --- - [x] depends on: #25166 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-algebra large-import
label:t-algebra$
 66/21 Mathlib/LinearAlgebra/Basis/Basic.lean,Mathlib/LinearAlgebra/Basis/Defs.lean,Mathlib/LinearAlgebra/FreeModule/Basic.lean 3 3 ['github-actions', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
83-36336
2 months ago
unknown
0-0
0 seconds
34050 Julian
author:Julian
 feat(GraphTheory): Graham-Pollak theorem --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) WIP awaiting-author t-combinatorics merge-conflict 189/7 Mathlib.lean,Mathlib/Combinatorics/SimpleGraph/CompleteMultipartite.lean,Mathlib/Combinatorics/SimpleGraph/EdgeLabeling.lean,Mathlib/Combinatorics/SimpleGraph/GrahamPollak.lean 4 3 ['github-actions', 'mathlib-merge-conflicts'] nobody
83-23661
2 months ago
126-25490
126 days ago
0-13
13 seconds
34963 Parcly-Taxel
author:Parcly-Taxel
 feat(Archive): proof of the Robbins conjecture Cf. [#mathlib4 > Alternative axiomatization of boolean algebras @ 💬](https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/Alternative.20axiomatization.20of.20boolean.20algebras/near/558900960) and #31924. t-algebra awaiting-zulip
label:t-algebra$
 610/0 Archive.lean,Archive/Robbins.lean 2 2 ['chrisflav', 'github-actions'] chrisflav
assignee:chrisflav
83-17194
2 months ago
32-17169
32 days ago
71-52253
71 days
35376 michaellee94
author:michaellee94
 feat(Geometry/Manifold): orientable manifolds --- - [x] depends on: #33189 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor WIP t-differential-geometry merge-conflict awaiting-author 2116/11 Mathlib.lean,Mathlib/Geometry/Manifold/Instances/MoebiusBand.lean,Mathlib/Geometry/Manifold/Instances/Real.lean,Mathlib/Geometry/Manifold/IsManifold/ExtChartAt.lean,Mathlib/Geometry/Manifold/IsManifold/InteriorBoundary.lean,Mathlib/Geometry/Manifold/Orientation.lean,Mathlib/Topology/Closure.lean 7 8 ['Rida-Hamadani', 'github-actions', 'mathlib-dependent-issues', 'mathlib-merge-conflicts'] nobody
82-82112
2 months ago
96-15158
96 days ago
0-100
1 minute
33406 dupuisf
author:dupuisf
 feat: add basics of majorization This PR defines [majorization](https://en.wikipedia.org/wiki/Majorization). This is needed to develop the theory of unitarily invariant norms on `ℂ^n`, in particular Schatten norms. --- - [ ] depends on: #33394 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-analysis awaiting-author WIP 752/13 Mathlib.lean,Mathlib/Analysis/Convex/Majorization/Basic.lean,Mathlib/Analysis/Convex/Majorization/Defs.lean,Mathlib/Data/Finset/Image.lean,Mathlib/Data/Finset/Max.lean,Mathlib/Data/Finset/Powerset.lean,Mathlib/Data/Fintype/Card.lean,Mathlib/Order/Interval/Finset/Fin.lean,docs/references.bib 9 10 ['dupuisf', 'github-actions', 'j-loreaux', 'mathlib-dependent-issues', 'mathlib-merge-conflicts'] j-loreaux
assignee:j-loreaux
82-81785
2 months ago
87-9181
87 days ago
8-27887
8 days
32374 adamtopaz
author:adamtopaz
 feat(Tactic/WildcardUniverse): Foo.{*, _, v*, max u v} This PR creates an elaborator for syntax of the form `Foo.{*, _, v*, max u v}`. A `*` indicates that a new universe parameter should be created, `_` and `max u v` elaborate using the existing level elaboration (so `_` elaborates to a level mvar). The syntax `v*` creates a level parameter of the form `v_n` for some value of `n`. The newly created level parameters are ordered in a particular way to match the order in which they appear in the syntax. For example, in `Foo.{*, _, v*, max u v}`, the level parameter associated with `*` will come before the other universes, including the parameter created by `v*`, and the parameters `u` and `v`. Similarly the parameter associated with `v*` will come *after* the one for `*`, and before both `u` and `v`. Note: Unlike `Category* C`, where we understand exactly how the universes involved in `C` (both in the term and its type) relate to the level parameter of the morphisms, we can't expect such precise control in general. For example, when `C.{u} : Type 0`, `Category* C` places the morphism level `v_1` before `u`, but `Category.{*} C` places it after `u`. In other words, `Foo.{...}` only reorders the level parameters based on the parameters that appear in the (elaborated) `...`, without any regard to the universes that appear in the *arguments* to `Foo.{...}`. Co-authored-by: Claude --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-meta awaiting-author WIP LLM-generated 720/0 Mathlib.lean,Mathlib/Tactic.lean,Mathlib/Tactic/WildcardLevel.lean,MathlibTest/WildcardLevel.lean 4 52 ['JovanGerb', 'adamtopaz', 'fpvandoorn', 'github-actions', 'leanprover-radar'] JovanGerb and dwrensha
assignee:dwrensha assignee:JovanGerb
82-77930
2 months ago
101-29999
101 days ago
63-17465
63 days
35734 mkaratarakis
author:mkaratarakis
 feat(NumberTheory): matrix bounds and Siegel's lemma application for Gelfond-Schneider This PR is the second component in the formalization of the Gelfond-Schneider Theorem (Hilbert's Seventh Problem), establishing the transcendence of $\alpha^\beta$. Building on the algebraic setup from the previous PR #35733, this file establishes analytical bounds on the linear system matrix and applies Siegel's Lemma (Lemma 8.2) to extract a bounded, non-trivial integer solution vector. We establish the exact upper bounds required to construct the auxiliary integer function $R(x)$. `c₃` and Matrix Bounds (`house_matrixA_le`)**: We define the bounding constant $c_3$, which aggregates the base bounds $c_2$ and the maximal houses of the algebraic preimages $\alpha', \beta', \gamma'$. Through extensive algebraic manipulation, we formally prove that the house of the entries in our linear system matrix $A$ is strictly bounded by $c_3^n * n^{(n - 1) / 2}$. Using the bounds established above, we apply `house.exists_ne_zero_int_vec_house_le` (a formalization of Lemma 8.2, p. 490) to guarantee the existence of a non-trivial vector of algebraic integers $\eta$ in the kernel of $A$. We define the solution bounding constant $c_4$ and prove the textbook bound that the house of our resulting coefficient vector $\eta$ satisfies $\forall k, \|\eta_k\| \leq c_4^n * n^{(n + 1) / 2}$. - [ ] depends on: #35733 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor t-number-theory blocked-by-other-PR 872/5 Mathlib.lean,Mathlib/NumberTheory/NumberField/House.lean,Mathlib/NumberTheory/Transcendental/GelfondSchneider/MainAlg.lean,Mathlib/NumberTheory/Transcendental/GelfondSchneider/MainAlgSetup.lean 4 3 ['github-actions', 'mathlib-dependent-issues'] nobody
82-32642
2 months ago
87-6857
87 days ago
0-306
5 minutes
34875 banrovegrie
author:banrovegrie
 feat(LinearAlgebra/Matrix): add Sherman-Morrison formula Mathlib has the matrix determinant lemma (`det_add_replicateCol_mul_replicateRow` in SchurComplement.lean) but lacked the corresponding inverse formula. This PR fills that gap. - Add `Matrix.inv_add_vecMulVec`: Sherman-Morrison formula for `(A + uv^T)^{-1}` - Add `Matrix.inv_sub_vecMulVec`: subtraction variant - Add `Matrix.isUnit_det_add_vecMulVec`: invertibility under the formula's hypotheses ## Test plan - [x] `lake build` passes - [x] Lines within 100 char limit - [x] All declarations have docstrings **Any specific AI usage?**: Used Copilot for review purposes. t-algebra new-contributor awaiting-author
label:t-algebra$
 135/0 Mathlib.lean,Mathlib/LinearAlgebra/Matrix/ShermanMorrison.lean 2 14 ['Xxxjdjdid', 'banrovegrie', 'chrisflav', 'copilot-pull-request-reviewer', 'eric-wieser', 'github-actions', 'wwylele'] chrisflav
assignee:chrisflav
82-20270
2 months ago
37-17359
37 days ago
69-6728
69 days
29982 hrmacbeth
author:hrmacbeth
 feat: new `isolate` tactic This PR adds a new tactic, `isolate`, which "solves for x" in an equation or relation. For example: ```lean example (a b : ℝ) (f : ℝ → ℝ) : 5 * f a - 3 < b := by isolate f a -- new goal: `⊢ f a < (b + 3) / 5` ``` The `isolate` tactic may generate side goals, if these are necessary to justify the transformation. The tactic will attempt to justify such side goals using `positivity` (as in the above example), unification, or type class inference, but if unsuccessful will present them to the user. For example: ```lean example (a b c : ℝ) (f : ℝ → ℝ) : c * f a - 3 < b := by isolate f a -- new goal: `⊢ f a < (b + 3) / c` -- second (side) new goal: `⊢ 0 < c` ``` The `isolate` tactic is extensible. Coverage may be extended to new relations and new operations-to-be-undone by tagging appropriate lemmas with the new `@[isolate]` attribute. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) large-import t-meta awaiting-author merge-conflict 943/1 Mathlib.lean,Mathlib/Analysis/SpecialFunctions/Log/Basic.lean,Mathlib/Analysis/SpecialFunctions/Pow/Real.lean,Mathlib/Data/Real/Sqrt.lean,Mathlib/Tactic.lean,Mathlib/Tactic/Isolate.lean,Mathlib/Tactic/Isolate/Core.lean,Mathlib/Tactic/Isolate/Tagging.lean,Mathlib/Tactic/Relation/Symm.lean,MathlibTest/Isolate/Heavyweight.lean,MathlibTest/Isolate/Lightweight.lean,scripts/noshake.json 12 83 ['JovanGerb', 'PatrickMassot', 'Vierkantor', 'github-actions', 'hrmacbeth', 'kim-em', 'mathlib-merge-conflicts', 'mathlib4-merge-conflict-bot'] JovanGerb
assignee:JovanGerb
82-9548
2 months ago
50-28896
50 days ago
80-58929
80 days
26013 tsuki8
author:tsuki8
 feat(Data/Finset/Card,Data/Set/Finite/Basic): TODO needs a better title add `card_bijOn` and `finset_subset_preimage_of_finite_image` Add `card_bijOn`: proves that for a bijection between finsets, their cardinalities are equal Add `finset_subset_preimage_of_finite_image`: constructs a finset subset preserving image cardinality Co-authored-by: Junyu Guo --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) awaiting-author t-data new-contributor 15/0 Mathlib/Data/Finset/Card.lean,Mathlib/Data/Set/Finite/Basic.lean 2 6 ['Ruben-VandeVelde', 'github-actions', 'mathlib-merge-conflicts'] nobody
81-66847
2 months ago
325-46580
325 days ago
13-85893
13 days
29624 mcdoll
author:mcdoll
 feat(LinearAlgebra/LinearPMap): add definition of resolvent and first resolvent identity --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra t-analysis awaiting-author
label:t-algebra$
 189/9 Mathlib/LinearAlgebra/LinearPMap.lean 1 11 ['github-actions', 'j-loreaux', 'mathlib-merge-conflicts', 'mathlib4-merge-conflict-bot', 'mcdoll'] kim-em
assignee:kim-em
81-58865
2 months ago
177-71136
177 days ago
64-60811
64 days
28685 mitchell-horner
author:mitchell-horner
 feat(Combinatorics/SimpleGraph): prove the minimal-degree version of the Erdős-Stone theorem Proves the minimal degree-version of the Erdős-Stone theorem: If `G` has a minimal degree of at least `(1 - 1 / r + o(1)) * card V`, then `G` contains a copy of a `completeEquipartiteGraph` in `r + 1` parts each of size `t`. The double-counting construction from the proof is available in `namespace ErdosStone`. --- - [x] depends on: #25843 - [x] depends on: #27597 - [x] depends on: #27599 - [x] depends on: #28443 - [x] depends on: #28445 - [x] depends on: #28446 - [x] depends on: #28447 This is the first of several pull requests towards the full Erdős-Stone(-Simonovits) theorem, hence the name of the file. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-combinatorics maintainer-merge 323/0 Mathlib.lean,Mathlib/Combinatorics/SimpleGraph/Extremal/ErdosStoneSimonovits.lean 2 19 ['YaelDillies', 'b-mehta', 'github-actions', 'mathlib-dependent-issues', 'mathlib4-merge-conflict-bot', 'mitchell-horner', 'robin-carlier'] b-mehta
assignee:b-mehta
81-55264
2 months ago
18-75926
18 days ago
78-84379
78 days
34910 SnirBroshi
author:SnirBroshi
 feat(Combinatorics/SimpleGraph/Acyclic): a graph is a tree iff it's acyclic and has exactly `n - 1` edges --- This was my white whale for quite some time. Hooray! - [x] depends on: #34907 - [ ] depends on: #34909 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) blocked-by-other-PR t-combinatorics 98/1 Mathlib/Combinatorics/SimpleGraph/Acyclic.lean,Mathlib/Combinatorics/SimpleGraph/Connectivity/Connected.lean,Mathlib/Data/Sym/Sym2.lean,Mathlib/Order/RelIso/Basic.lean 4 3 ['github-actions', 'mathlib-dependent-issues', 'mathlib-merge-conflicts'] nobody
81-52528
2 months ago
105-42619
105 days ago
0-796
13 minutes
35805 adrianmartir
author:adrianmartir
 feat(NumberTheory/Divisors): Add `infinite_setOf_divisors_iff` This proves that the set of divisors `{ m | m | n }` of a natural number `n` is infinite if and only if `n` is zero. The first proof draft was by @Aristotle-Harmonic. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-number-theory new-contributor awaiting-author 10/0 Mathlib/NumberTheory/Divisors.lean 1 6 ['adrianmartir', 'alexjbest', 'github-actions', 'tb65536'] tb65536
assignee:tb65536
81-44173
2 months ago
58-23513
58 days ago
27-18698
27 days
35964 b-reinke
author:b-reinke
 feat(CategoryTheory/Linear): define category algebra WIP definition of the category algebra of a linear category. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) WIP t-algebra t-category-theory
label:t-algebra$
 171/0 Mathlib.lean,Mathlib/CategoryTheory/Linear/CategoryAlgebra.lean,Mathlib/Data/DFinsupp/BigOperators.lean 3 2 ['github-actions'] nobody
81-42478
2 months ago
81-45596
81 days ago
0-15
15 seconds
35442 dhyan-aranha
author:dhyan-aranha
 feat: Affine line with doubled origin counter example --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor awaiting-author t-algebraic-geometry 305/0 Counterexamples.lean,Counterexamples/AffineLineWithDoubledOrigin.lean,Mathlib/AlgebraicGeometry/Limits.lean,Mathlib/Topology/Category/TopCat/Limits/Pullbacks.lean 4 21 ['BryceT233', 'chrisflav', 'dhyan-aranha', 'github-actions'] nobody
81-39777
2 months ago
94-27782
94 days ago
0-5488
1 hour
26942 pechersky
author:pechersky
 feat(RingTheory/Valuation/ValueGroupIso): isomorphism of value groups when compatible and also to the ValuativeRel's value group by request from comment in https://github.com/leanprover-community/mathlib4/pull/26754#issuecomment-3051770901 - [ ] depends on: #26588 --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) - [x] depends on: #26939 - [x] depends on: #26940 - [x] depends on: #26941 merge-conflict t-ring-theory t-order 299/3 Mathlib.lean,Mathlib/Algebra/GroupWithZero/Range.lean,Mathlib/Algebra/Order/GroupWithZero/Range.lean,Mathlib/Algebra/Order/GroupWithZero/WithZero.lean,Mathlib/Algebra/Order/Monoid/WithTop.lean,Mathlib/RingTheory/Valuation/ValueGroupIso.lean 6 10 ['faenuccio', 'github-actions', 'mathlib-dependent-issues', 'mathlib4-merge-conflict-bot', 'pechersky'] faenuccio
assignee:faenuccio
81-36017
2 months ago
281-21427
281 days ago
10-67838
10 days
29713 jessealama
author:jessealama
 feat(Algebra/Homology): add Euler–Poincaré formula This PR builds on the generalized Euler characteristic framework from #31121 to prove the Euler-Poincaré formula for chain complexes. PR #31121 defines the Euler characteristic for general homological complexes. This PR specializes those definitions to ℤ-indexed chain complexes and proves the main Euler-Poincaré theorem. ### Main result (in `EulerPoincare.lean`) * `ChainComplex.eulerChar_eq_homologyEulerChar`: For ℤ-indexed bounded chain complexes of finite-dimensional modules over a division ring, the alternating sum of chain dimensions equals the alternating sum of homology dimensions. ### Supporting lemmas The file also provides dimension lemmas generalized to arbitrary `HomologicalComplex (ModuleCat k) c` (not just ℤ-indexed chain complexes): * `HomologicalComplex.dFrom_zero_range` / `dTo_zero_range`: zero range when the target/source object is zero * `HomologicalComplex.dFrom_range_finrank_eq_d` / `dTo_range_finrank_eq_d`: range of `dFrom`/`dTo` has the same dimension as the underlying differential * `HomologicalComplex.range_dTo_le_ker_dFrom`: range of `dTo` is contained in the kernel of `dFrom` --- - [ ] depends on: #38483 (`Antiperiodic.sum_Ico_shift` and bilinear cancellation lemma) Builds on: #31121 Related to: #29639, #29643, #29646 awaiting-author t-algebra new-contributor blocked-by-other-PR
label:t-algebra$
 428/0 Mathlib.lean,Mathlib/Algebra/BigOperators/Periodic.lean,Mathlib/Algebra/Homology/EulerPoincare.lean 2 26 ['github-actions', 'jessealama', 'joelriou', 'kim-em', 'mathlib-dependent-issues', 'mathlib-merge-conflicts', 'mathlib4-merge-conflict-bot'] nobody
81-35101
2 months ago
209-50273
209 days ago
35-45800
35 days
25740 robin-carlier
author:robin-carlier
 feat(AlgebraicTopology/SimplexCategory/GeneratorsRelations): `SimplexCategoryGenRel.toSimplexCategory` is an equivalence We use the normal forms for morphisms in `SimplexCategoryGenRel` to prove that `SimplexCategoryGenRel.toSimplexCategory` is an equivalence. We prove in order that there exists unique lifts in `SimplexCategoryGenRel` of mono (resp. epis) in `SimplexCategory`, and use this to deduce fully faithfulness of `SimplexCategoryGenRel.toSimplexCategory` thanks to the existing epi-mono factorisation in `SimplexCategory`. Part of a series of PR formalising that `SimplexCategoryGenRel` is equivalent to `SimplexCategory`. --- - [ ] depends on: #25737 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) --- *This PR continues the work from #21747.* *Original PR: https://github.com/leanprover-community/mathlib4/pull/21747* t-algebraic-topology blocked-by-other-PR 555/2 Mathlib.lean,Mathlib/AlgebraicTopology/SimplexCategory/GeneratorsRelations/Equivalence.lean,Mathlib/AlgebraicTopology/SimplexCategory/GeneratorsRelations/NormalForms.lean 3 3 ['github-actions', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
81-19133
2 months ago
344-51665
344 days ago
0-2
2 seconds
35095 thorimur
author:thorimur
 feat: overlapping instances linter This PR contributes a syntax linter that fires on declarations with local instances which overlap on data-carrying projections, developed as an interactive version of @JovanGerb 's environment linter for the same purpose (#33677). It is currently prohibitively expensive to run this linter in CI (see [bench results](https://radar.lean-lang.org/repos/mathlib4/commits/5a9f0ed1fe60b3a5c94880df4130b1bc1be764ed?reference=789108e1c80a056f4ccbfbc7cc1f9d40594087d3)). This linter therefore only runs interactively, in the language server. We may want a faster, compiled version to run in CI as an environment linter for a hybrid strategy. Co-authored-by: Jovan Gerbscheid --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) large-import merge-conflict 619/9 Mathlib.lean,Mathlib/Algebra/Module/Lattice.lean,Mathlib/Algebra/Order/Antidiag/Prod.lean,Mathlib/Init.lean,Mathlib/Lean/ContextInfo.lean,Mathlib/Lean/Elab/InfoTree.lean,Mathlib/Lean/Message.lean,Mathlib/Tactic.lean,Mathlib/Tactic/Linter/DirectoryDependency.lean,Mathlib/Tactic/Linter/OverlappingInstances.lean,MathlibTest/OverlappingInstances.lean 11 27 ['JovanGerb', 'Vierkantor', 'github-actions', 'leanprover-radar', 'mathlib-merge-conflicts', 'thorimur'] nobody
81-15037
2 months ago
unknown
0-0
0 seconds
15355 adomani
author:adomani
 feat: MiM PR report --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) WIP merge-conflict 193/0 .github/workflows/monthly_pr_report.yaml,scripts/README.md,scripts/find_labels.sh 3 18 ['YaelDillies', 'adomani', 'github-actions', 'mathlib-merge-conflicts', 'vihdzp'] nobody
81-14820
2 months ago
unknown
0-0
0 seconds
22464 adomani
author:adomani
 feat(CI): declarations diff in Lean Rewrites the `declaration_diff` script in Lean. You can see the effect of the new script in the testing branch #22497. The new CI step runs in approximately 5mins, but is separate from the `build` step. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) awaiting-author CI merge-conflict 151/0 .github/workflows/PR_summary_lean.yml,scripts/README.md,scripts/declarations_diff.lean,scripts/declarations_diff_lean_shell_glue.sh 4 8 ['bryangingechen', 'github-actions', 'grunweg', 'j-loreaux', 'mathlib-merge-conflicts'] nobody
81-13225
2 months ago
297-80891
297 days ago
146-23496
146 days
22648 adomani
author:adomani
 test: lean implementation decl diff quandle --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict 210/1 .github/workflows/PR_summary_lean.yml,Mathlib/Algebra/Quandle.lean,scripts/README.md,scripts/declarations_diff.lean,scripts/declarations_diff_lean_shell_glue.sh 5 5 ['adomani', 'eric-wieser', 'github-actions', 'mathlib-merge-conflicts'] nobody
81-13223
2 months ago
unknown
0-0
0 seconds
35096 dagurtomas
author:dagurtomas
 chore(CategoryTheory): reduce API duplication for concrete categories --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) WIP merge-conflict 186/1376 Mathlib/Algebra/Category/AlgCat/Basic.lean,Mathlib/Algebra/Category/CommAlgCat/Basic.lean,Mathlib/Algebra/Category/CommBialgCat.lean,Mathlib/Algebra/Category/Grp/Adjunctions.lean,Mathlib/Algebra/Category/Grp/Basic.lean,Mathlib/Algebra/Category/Grp/Colimits.lean,Mathlib/Algebra/Category/Grp/EpiMono.lean,Mathlib/Algebra/Category/Grp/Kernels.lean,Mathlib/Algebra/Category/Grp/LeftExactFunctor.lean,Mathlib/Algebra/Category/Grp/Limits.lean,Mathlib/Algebra/Category/ModuleCat/Adjunctions.lean,Mathlib/Algebra/Category/ModuleCat/Basic.lean,Mathlib/Algebra/Category/ModuleCat/EpiMono.lean,Mathlib/Algebra/Category/ModuleCat/ExteriorPower.lean,Mathlib/Algebra/Category/ModuleCat/FilteredColimits.lean,Mathlib/Algebra/Category/ModuleCat/Injective.lean,Mathlib/Algebra/Category/ModuleCat/Kernels.lean,Mathlib/Algebra/Category/ModuleCat/Limits.lean,Mathlib/Algebra/Category/ModuleCat/Monoidal/Basic.lean,Mathlib/Algebra/Category/ModuleCat/Monoidal/Symmetric.lean,Mathlib/Algebra/Category/ModuleCat/Products.lean,Mathlib/Algebra/Category/ModuleCat/Projective.lean,Mathlib/Algebra/Category/ModuleCat/Semi.lean,Mathlib/Algebra/Category/MonCat/Adjunctions.lean,Mathlib/Algebra/Category/MonCat/Basic.lean,Mathlib/Algebra/Category/MonCat/FilteredColimits.lean,Mathlib/Algebra/Category/MonCat/Limits.lean,Mathlib/Algebra/Category/Ring/Adjunctions.lean,Mathlib/Algebra/Category/Ring/Basic.lean,Mathlib/Algebra/Category/Ring/Colimits.lean,Mathlib/Algebra/Category/Ring/FilteredColimits.lean,Mathlib/Algebra/Category/Ring/FinitePresentation.lean,Mathlib/Algebra/Category/Ring/Instances.lean,Mathlib/Algebra/Category/Ring/Limits.lean,Mathlib/Algebra/Category/Semigrp/Basic.lean,Mathlib/Algebra/Homology/DerivedCategory/Ext/Basic.lean,Mathlib/CategoryTheory/ConcreteCategory/Basic.lean,Mathlib/CategoryTheory/Extensive.lean,Mathlib/CategoryTheory/Limits/ConcreteCategory/WithAlgebraicStructures.lean,Mathlib/CategoryTheory/Monoidal/Cartesian/Grp_.lean,Mathlib/CategoryTheory/Monoidal/Cartesian/Mon_.lean,Mathlib/CategoryTheory/Monoidal/Internal/Module.lean,Mathlib/CategoryTheory/Preadditive/Yoneda/Basic.lean,Mathlib/CategoryTheory/SingleObj.lean,Mathlib/Geometry/RingedSpace/PresheafedSpace/HasColimits.lean,Mathlib/Order/Category/BddDistLat.lean,Mathlib/Order/Category/BddLat.lean,Mathlib/Order/Category/BddOrd.lean,Mathlib/Order/Category/BoolAlg.lean,Mathlib/Order/Category/DistLat.lean,Mathlib/Order/Category/FinBddDistLat.lean,Mathlib/Order/Category/Frm.lean,Mathlib/Order/Category/HeytAlg.lean,Mathlib/Order/Category/Lat.lean,Mathlib/Order/Category/LinOrd.lean,Mathlib/Order/Category/PartOrd.lean,Mathlib/Order/Category/PartOrdEmb.lean,Mathlib/Order/Category/Preord.lean,Mathlib/Topology/Algebra/Category/ProfiniteGrp/Completion.lean,Mathlib/Topology/Category/Profinite/Basic.lean,Mathlib/Topology/Category/TopCat/Basic.lean,Mathlib/Topology/Category/TopCat/EffectiveEpi.lean,Mathlib/Topology/Category/TopCat/GrothendieckTopology.lean,Mathlib/Topology/Category/TopCat/Limits/Cofiltered.lean,Mathlib/Topology/Category/TopCat/Limits/Konig.lean,Mathlib/Topology/Category/TopCat/Limits/Products.lean,Mathlib/Topology/Category/TopCat/Limits/Pullbacks.lean,Mathlib/Topology/Gluing.lean 68 2 ['github-actions', 'mathlib-merge-conflicts'] nobody
81-5092
2 months ago
unknown
0-0
0 seconds
35766 DavidLedvinka
author:DavidLedvinka
 feat(Probability): add Monotonicity of setBernoulli on IsUpperSet merge-conflict 254/47 Mathlib.lean,Mathlib/MeasureTheory/Measure/AEMeasurable.lean,Mathlib/MeasureTheory/Measure/AbsolutelyContinuous.lean,Mathlib/MeasureTheory/Measure/Dirac.lean,Mathlib/MeasureTheory/Measure/Typeclasses/Probability.lean,Mathlib/Order/UpperLower/Relative.lean,Mathlib/Probability/Combinatorics/BinomialRandomGraph/Defs.lean,Mathlib/Probability/Distributions/Bernoulli.lean,Mathlib/Probability/Distributions/SetBernoulli.lean,Mathlib/Probability/ProductMeasure.lean,Mathlib/Topology/UnitInterval.lean 11 16 ['DavidLedvinka', 'b-mehta', 'github-actions', 'mathlib-merge-conflicts'] nobody
81-5079
2 months ago
unknown
0-0
0 seconds
35828 AntoineChambert-Loir
author:AntoineChambert-Loir
 feat(RingTheory/GradedAlgebra/Homogeneous/Hom): homogeneous algebra maps and evaluation Define the notion of homogeneous algebra morphism between algebra maps. Prove that the evaluation of a (weighted) homogeneous multivariate polynomial at adequate elements of a graded algebra define a homogeneous algebra morphism. co-authored with @mariainesdff --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-ring-theory WIP 74/0 Mathlib.lean,Mathlib/Algebra/GradedMonoid.lean,Mathlib/RingTheory/GradedAlgebra/Homogeneous/Hom.lean 3 11 ['AntoineChambert-Loir', 'github-actions', 'joneugster', 'riccardobrasca'] riccardobrasca
assignee:riccardobrasca
80-75753
2 months ago
41-47302
41 days ago
43-3286
43 days
28286 bwangpj
author:bwangpj
 feat(Geometry/Manifold/ContMDiff): basic lemmas for analytic (`C^ω`) functions Add basic lemmas relating `ContMDiff` in the `C^ω` case to being `Analytic` on charts. This is upstreamed from [https://github.com/girving/ray](https://github.com/girving/ray). Co-authored-by: Geoffrey Irving --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) awaiting-author t-differential-geometry new-contributor 36/0 Mathlib/Geometry/Manifold/ContMDiff/Defs.lean 1 14 ['bwangpj', 'girving', 'github-actions', 'grunweg', 'kbuzzard', 'mathlib-merge-conflicts', 'sgouezel'] sgouezel
assignee:sgouezel
80-52315
2 months ago
255-48665
255 days ago
27-52841
27 days
30750 SnirBroshi
author:SnirBroshi
 feat(Data/Quot): `toSet` and `equivClassOf` Define `toSet` which gets the set corresponding to an element of a quotient, and `equivClassOf` which gets the equivalence class of an element under a quotient. --- I found these definitions helpful when working with quotients, specifically `ConnectedComponents` of a `TopologicalSpace`. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-data awaiting-author awaiting-zulip 162/0 Mathlib/Data/Quot.lean,Mathlib/Data/Set/Image.lean,Mathlib/Data/SetLike/Basic.lean,Mathlib/Data/Setoid/Basic.lean 4 8 ['SnirBroshi', 'TwoFX', 'eric-wieser', 'github-actions', 'linesthatinterlace', 'mathlib-merge-conflicts'] TwoFX
assignee:TwoFX
80-47354
2 months ago
176-50694
176 days ago
36-69524
36 days
34015 erdOne
author:erdOne
 feat(AlgebraicGeometry): category of schemes affine over a base --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebraic-geometry delegated awaiting-author 466/11 Mathlib.lean,Mathlib/AlgebraicGeometry/AffineOver.lean,Mathlib/AlgebraicGeometry/Limits.lean,Mathlib/AlgebraicGeometry/Morphisms/Affine.lean,Mathlib/AlgebraicGeometry/OpenImmersion.lean,Mathlib/AlgebraicGeometry/RelativeGluing.lean,Mathlib/AlgebraicGeometry/Sites/SmallAffineZariski.lean,Mathlib/CategoryTheory/Sites/Hypercover/Subcanonical.lean 7 52 ['chrisflav', 'dagurtomas', 'erdOne', 'github-actions', 'mathlib-bors', 'mathlib-merge-conflicts', 'mathlib4-merge-conflict-bot', 'riccardobrasca'] chrisflav
assignee:chrisflav
80-22339
2 months ago
12-47882
12 days ago
40-35668
40 days
27274 peabrainiac
author:peabrainiac
 feat(Geometry/Diffeology): continuous diffeologies & D-topology-lemmas Introduces the continuous diffeology on topological spaces and the Galois connection between it and the D-topology, and then uses it to prove a few more lemmas about the D-topology. --- Aside from being useful for defining a right adjoint of the D-topology functor later, this is a prerequisite for correctly defining coinduced diffeologies (namely in such a way that the D-topology is defeq to the coinduced topology) and thus also for most constructions of diffeological spaces. - [x] depends on: #26973 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-differential-geometry awaiting-author 153/0 Mathlib.lean,Mathlib/Geometry/Diffeology/Continuous.lean 2 7 ['github-actions', 'grunweg', 'mathlib-dependent-issues', 'mathlib4-merge-conflict-bot', 'ocfnash'] nobody
80-14249
2 months ago
80-14249
80 days ago
3-44558
3 days
34120 winstonyin
author:winstonyin
 feat: `GroupWithZero` versions of `le` lemmas [Zulip thread: #mathlib4 > prod_le_pow_card](https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/prod_le_pow_card/with/568611481) ## Motivation Inequality lemmas such as `Multiset.prod_le_pow_card` that are true for the reals are only stated for non-negative reals. Instead of simply providing non-negativity as a proof obligation, the downstream user is forced to lift all non-negative terms to `NNReal` and then invoke the inequality lemma. This motivates duplicating lemmas that assume `[CommMonoid R] [MulLeftMono R]` to ones that assume `[CommMonoidWithZero R] [ZeroLEOneClass R] [PosMulMono R]` along with a non-negativity hypothesis. I've only included the obvious case for now. I'll carefully comb through these lemmas to ensure pairing and consistent naming. I've included here a downstream effect of this change, greatly simplifying a part of a proof. I'll record some of these here as well, but I'll move them to a separate PR at the end . ## Changes * Add `List.prod_le_pow_length₀` and `Multiset.prod_le_pow_card₀`. * Add subscript 0 to `prod_map_le_pow_card`, meaning it assumes `CommMonoidWithZero`, consistent with similar lemmas. * Remove the `FunLike` assumption in `prod_map_le_pow_length₀` and `prod_map_le_pow_card₀` * Update and shorten proof of `max_norm_root_eq_spectralValue`. ## TODO * Ensure pairing between lemmas that assume `CommMonoid` and `CommMonoidWithZero` across `List`, `Multiset`, `Finset`. * Find other such cases, e.g. `mul_lt_one`. * Ensure consistent naming using subscript 0. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) WIP large-import merge-conflict 662/286 Archive/Imo/Imo2025Q3.lean,Mathlib/Algebra/BigOperators/Finprod.lean,Mathlib/Algebra/Group/Submonoid/Pointwise.lean,Mathlib/Algebra/Order/Archimedean/Class.lean,Mathlib/Algebra/Order/BigOperators/Group/Finset.lean,Mathlib/Algebra/Order/BigOperators/Group/List.lean,Mathlib/Algebra/Order/BigOperators/Group/Multiset.lean,Mathlib/Algebra/Order/BigOperators/GroupWithZero/Finset.lean,Mathlib/Algebra/Order/BigOperators/GroupWithZero/List.lean,Mathlib/Algebra/Order/BigOperators/GroupWithZero/Multiset.lean,Mathlib/Algebra/Order/BigOperators/Ring/Multiset.lean,Mathlib/Algebra/Order/Group/DenselyOrdered.lean,Mathlib/Algebra/Order/GroupWithZero/Unbundled/Basic.lean,Mathlib/Algebra/Order/Interval/Basic.lean,Mathlib/Algebra/Order/Monoid/Unbundled/Pow.lean,Mathlib/Algebra/Order/Monovary.lean,Mathlib/Algebra/Tropical/Basic.lean,Mathlib/Analysis/Analytic/Composition.lean,Mathlib/Analysis/BoxIntegral/DivergenceTheorem.lean,Mathlib/Analysis/CStarAlgebra/ContinuousFunctionalCalculus/Order.lean,Mathlib/Analysis/Calculus/FDeriv/Measurable.lean,Mathlib/Analysis/Complex/Trigonometric.lean,Mathlib/Analysis/InnerProductSpace/Orientation.lean,Mathlib/Analysis/Normed/Module/PiTensorProduct/InjectiveSeminorm.lean,Mathlib/Analysis/Normed/Ring/Basic.lean,Mathlib/Analysis/Normed/Unbundled/SpectralNorm.lean,Mathlib/Analysis/Polynomial/MahlerMeasure.lean,Mathlib/Analysis/SpecialFunctions/Integrals/Basic.lean,Mathlib/Analysis/SpecialFunctions/Pochhammer.lean,Mathlib/Analysis/SpecialFunctions/Trigonometric/Bounds.lean,Mathlib/Analysis/SpecificLimits/Basic.lean,Mathlib/Combinatorics/SimpleGraph/Regularity/Chunk.lean,Mathlib/Data/ENNReal/Operations.lean,Mathlib/Data/NNReal/Defs.lean,Mathlib/MeasureTheory/Constructions/Pi.lean,Mathlib/MeasureTheory/Measure/HasOuterApproxClosedProd.lean,Mathlib/MeasureTheory/Measure/Hausdorff.lean,Mathlib/MeasureTheory/Measure/Lebesgue/Basic.lean,Mathlib/NumberTheory/Bertrand.lean,Mathlib/NumberTheory/FermatPsp.lean,Mathlib/NumberTheory/Height/Basic.lean,Mathlib/NumberTheory/Height/MvPolynomial.lean,Mathlib/NumberTheory/ModularForms/JacobiTheta/OneVariable.lean,Mathlib/NumberTheory/Multiplicity.lean,Mathlib/NumberTheory/Padics/Hensel.lean,Mathlib/NumberTheory/Primorial.lean,Mathlib/NumberTheory/SiegelsLemma.lean,Mathlib/NumberTheory/SmoothNumbers.lean,Mathlib/Order/Filter/AtTopBot/Monoid.lean,Mathlib/RingTheory/Perfection.lean,Mathlib/RingTheory/Spectrum/Prime/ChevalleyComplexity.lean,Mathlib/Topology/Algebra/InfiniteSum/Order.lean,Mathlib/Topology/Algebra/Valued/WithZeroMulInt.lean,Mathlib/Topology/EMetricSpace/Paracompact.lean,Mathlib/Topology/MetricSpace/HausdorffDistance.lean,scripts/nolints_prime_decls.txt 54 3 ['github-actions', 'mathlib-merge-conflicts'] nobody
79-84651
2 months ago
123-64384
123 days ago
0-20
20 seconds
32942 kim-em
author:kim-em
 feat(CategoryTheory/Monoidal/Rigid): tensor product of exact pairings This PR adds the tensor product construction for exact pairings in rigid monoidal categories: - `ExactPairing.tensor`: Given exact pairings `(X₁, Y₁)` and `(X₂, Y₂)`, we get an exact pairing `(X₁ ⊗ X₂, Y₂ ⊗ Y₁)`. Note the reversed order in the second factor - this is essential for the monoidal structure of dual functors. - `HasRightDual.tensor` and `HasLeftDual.tensor`: If `X` and `Y` have duals, so does `X ⊗ Y` - `rightDual_tensor` and `leftDual_tensor` simp lemmas 🤖 Prepared with Claude Code t-category-theory LLM-generated awaiting-author 103/0 Mathlib/CategoryTheory/Monoidal/Rigid/Basic.lean,Mathlib/Tactic/Linter/TextBased/UnicodeLinter.lean 1 10 ['github-actions', 'joelriou', 'kim-em', 'robin-carlier'] nobody
79-75978
2 months ago
14-43429
14 days ago
3-49996
3 days
36099 SnirBroshi
author:SnirBroshi
 feat(Combinatorics/SimpleGraph/Sum): `edgeSet` equivalence --- - [ ] depends on: #34909 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-combinatorics blocked-by-other-PR 30/0 Mathlib/Combinatorics/SimpleGraph/Sum.lean,Mathlib/Data/Sym/Sym2.lean 2 2 ['github-actions', 'mathlib-dependent-issues'] nobody
79-63777
2 months ago
79-63778
79 days ago
0-1891
31 minutes
35157 Multramate
author:Multramate
 feat(RingTheory/AdjoinRoot): add IsFractionRing for AdjoinRoot Co-authored-by: Sriram Chinthalagiri Venkata @sriram3301 This contribution was created as part of the Heidelberg Lean workshop "Formalising algebraic geometry" in November 2025. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-ring-theory t-algebra awaiting-author
label:t-algebra$
 40/1 Mathlib/RingTheory/AdjoinRoot.lean 1 8 ['copilot-pull-request-reviewer', 'erdOne', 'github-actions', 'robin-carlier'] mattrobball
assignee:mattrobball
79-40394
2 months ago
70-15473
70 days ago
25-82526
25 days
29425 pechersky
author:pechersky
 feat(NumberTheory/Padics/Torsion): `HasEnoughRootsOfUnity ℤ_[p] (p - 1)` --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) - [x] depends on: #29403 - [x] depends on: #29404 - [x] depends on: #29405 - [x] depends on: #29408 - [x] depends on: #29424 - [ ] depends on: #30989 merge-conflict awaiting-author t-ring-theory 179/0 Mathlib.lean,Mathlib/NumberTheory/Padics/Torsion.lean,Mathlib/RingTheory/ZMod/Torsion.lean 3 6 ['erdOne', 'github-actions', 'mathlib-dependent-issues', 'mathlib4-merge-conflict-bot', 'pechersky'] erdOne
assignee:erdOne
79-40300
2 months ago
188-31118
188 days ago
44-24353
44 days
27980 smmercuri
author:smmercuri
 feat: dimensions of completions at infinite place extensions This PR continues the work from #24853. Original PR: https://github.com/leanprover-community/mathlib4/pull/24853 --- - [x] depends on: #27977 - [ ] depends on: #27978 - [x] depends on: #27974 - [x] depends on: #27975 - [ ] depends on: #27976 - [ ] depends on: #29942 - [ ] depends on: #29946 t-number-theory blocked-by-other-PR large-import merge-conflict FLT 619/2 Mathlib.lean,Mathlib/Analysis/Normed/Field/WithAbs.lean,Mathlib/Analysis/Normed/Ring/WithAbs.lean,Mathlib/NumberTheory/NumberField/Completion.lean,Mathlib/NumberTheory/NumberField/InfinitePlace/Dimension.lean,Mathlib/NumberTheory/NumberField/InfinitePlace/Embeddings.lean,Mathlib/NumberTheory/NumberField/InfinitePlace/Ramification.lean 7 4 ['github-actions', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
79-39285
2 months ago
290-35868
290 days ago
0-3752
1 hour
34138 pfaffelh
author:pfaffelh
 feat(MeasureTheory): Introduce `DiscreteMeasure α` giving rise to a `Measure α` as a sum of `dirac`s Define `DiscreteMeasure α` as a structure with `weight : α → ℝ≥0∞` Define `toMeasure (w : DiscreteMeasure α) : Measure α` as a sum of diracs Show properties of the resulting objects This PR intends to start a more userfriendly interaction with discrete probability (measure) theory, in contrast to probability mass functions (`PMF`). There are two main differences between `DiscreteMeasure` and `PMF`: * Every `PMF` hast the additional property `HasSum 1`, making the resulting measure a probability measure. (For `DiscreteMeasure`, I intend to use the typeclass `IsProbabilityMeasure`in a later PR instead.) * The `toMeasure` function of `MassFunction` defines the measure as a sum of diracs, which immediately makes computations possible. Discussion thread on [zulip](https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/PMF.20Refactor.3A.20FunLike.20vs.20Definition.20Change) - depends on: #37060 --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-measure-probability new-contributor 224/0 Mathlib.lean,Mathlib/Algebra/GroupWithZero/Indicator.lean,Mathlib/Data/Set/Pairwise/Basic.lean,Mathlib/MeasureTheory/Measure/DiscreteMeasure.lean 4 27 ['DavidLedvinka', 'eric-wieser', 'github-actions', 'mathlib-merge-conflicts', 'metakunt', 'ocfnash', 'pfaffelh'] ocfnash
assignee:ocfnash
79-36545
2 months ago
31-82797
31 days ago
82-19320
82 days
35327 SnirBroshi
author:SnirBroshi
 feat(SimpleGraph/Acyclic): the union of two trees that share exactly one vertex is a tree --- A surprisingly painful proof for something that seems trivial when drawing on the board. To avoid any doubts: no AI was involved whatsoever. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-combinatorics awaiting-author 95/0 Mathlib/Combinatorics/SimpleGraph/Acyclic.lean,Mathlib/Combinatorics/SimpleGraph/Walk/Operations.lean 2 10 ['SnirBroshi', 'YaelDillies', 'github-actions', 'mathlib-merge-conflicts', 'vbeffara', 'vlad902'] YaelDillies
assignee:YaelDillies
79-26484
2 months ago
62-79404
62 days ago
33-16907
33 days
36156 vihdzp
author:vihdzp
 chore: use `to_additive` for `MulAut` and `AddAut` We want to use a multiplicative structure on both, so we tag them as `to_additive_dont_translate`. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-group-theory 45/119 Mathlib/Algebra/Group/End.lean,Mathlib/Algebra/Group/Equiv/Defs.lean 2 1 ['github-actions'] nobody
78-85682
2 months ago
79-1010
79 days ago
0-46
46 seconds
36158 vihdzp
author:vihdzp
 chore: use `to_additive` for `IsConj` I don't really need this specific definition, but I do want additive versions of other declarations that depend on this. Some proofs were changed, since `MulAut.conj` can't be dualized (the analogous def `AddAut.conj` has to insert a `Multiplicative` in there). --- - [ ] depends on: #36156 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-group-theory blocked-by-other-PR merge-conflict 95/137 Mathlib/Algebra/Group/Conj.lean,Mathlib/Algebra/Group/End.lean,Mathlib/Algebra/Group/Equiv/Defs.lean,Mathlib/Tactic/Translate/ToAdditive.lean 4 3 ['github-actions', 'mathlib-dependent-issues', 'mathlib-merge-conflicts'] nobody
78-84019
2 months ago
78-84020
78 days ago
0-1731
28 minutes
36148 robin-carlier
author:robin-carlier
 test: make Category.assoc a pre-simp lemma --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) WIP t-category-theory merge-conflict 83/62 Mathlib/Algebra/Category/ModuleCat/Sheaf/Free.lean,Mathlib/Algebra/Homology/BifunctorHomotopy.lean,Mathlib/Analysis/Normed/Group/SemiNormedGrp/Kernels.lean,Mathlib/CategoryTheory/Category/Basic.lean,Mathlib/CategoryTheory/Dialectica/Basic.lean,Mathlib/CategoryTheory/EffectiveEpi/Comp.lean,Mathlib/CategoryTheory/Endomorphism.lean,Mathlib/CategoryTheory/Galois/GaloisObjects.lean,Mathlib/CategoryTheory/Generator/Basic.lean,Mathlib/CategoryTheory/GuitartExact/Over.lean,Mathlib/CategoryTheory/GuitartExact/VerticalComposition.lean,Mathlib/CategoryTheory/Iso.lean,Mathlib/CategoryTheory/Limits/Fubini.lean,Mathlib/CategoryTheory/Limits/Preserves/Shapes/AbelianImages.lean,Mathlib/CategoryTheory/Limits/Shapes/Diagonal.lean,Mathlib/CategoryTheory/Limits/Shapes/Images.lean,Mathlib/CategoryTheory/Limits/Shapes/Kernels.lean,Mathlib/CategoryTheory/Limits/Shapes/Pullback/Connected.lean,Mathlib/CategoryTheory/Limits/Shapes/Pullback/Pasting.lean,Mathlib/CategoryTheory/Limits/Shapes/WidePullbacks.lean,Mathlib/CategoryTheory/Limits/VanKampen.lean,Mathlib/CategoryTheory/Localization/Monoidal/Braided.lean,Mathlib/CategoryTheory/Monoidal/Braided/Transport.lean,Mathlib/CategoryTheory/Monoidal/Cartesian/Basic.lean,Mathlib/CategoryTheory/Monoidal/Cartesian/Mon_.lean,Mathlib/CategoryTheory/Monoidal/Closed/FunctorToTypes.lean,Mathlib/CategoryTheory/MorphismProperty/Descent.lean,Mathlib/CategoryTheory/Preadditive/Biproducts.lean,Mathlib/CategoryTheory/Sites/Descent/DescentData.lean,Mathlib/CategoryTheory/Sites/Descent/Precoverage.lean,Mathlib/CategoryTheory/Sites/Hypercover/One.lean 31 4 ['github-actions', 'leanprover-radar', 'mathlib-merge-conflicts', 'robin-carlier'] nobody
78-74347
2 months ago
79-15390
79 days ago
0-2
2 seconds
36167 WenrongZou
author:WenrongZou
 feat(RingTheory/FormalGroup): construction of additive inverse of formal group construction of additive inverse --- - [x] depends on: #35912 - [ ] depends on: #38052 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-ring-theory blocked-by-other-PR 459/7 Mathlib.lean,Mathlib/RingTheory/FormalGroup/AddInv.lean,Mathlib/RingTheory/FormalGroup/Basic.lean,Mathlib/RingTheory/MvPowerSeries/Substitution.lean,Mathlib/RingTheory/PowerSeries/Basic.lean,Mathlib/RingTheory/PowerSeries/Evaluation.lean,Mathlib/RingTheory/PowerSeries/Substitution.lean,Mathlib/RingTheory/PowerSeries/Trunc.lean 7 3 ['github-actions', 'mathlib-dependent-issues', 'mathlib-merge-conflicts'] nobody
78-63626
2 months ago
37-46804
37 days ago
4-14966
4 days
36142 erdOne
author:erdOne
 feat(Topology): sheaves of modules in `Over U` --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-topology large-import awaiting-author merge-conflict 116/7 Mathlib.lean,Mathlib/CategoryTheory/Sites/Spaces.lean,Mathlib/Topology/Sheaves/Module.lean,Mathlib/Topology/Sheaves/Over.lean,Mathlib/Topology/Sheaves/SheafCondition/Sites.lean 5 5 ['github-actions', 'joelriou', 'mathlib-merge-conflicts'] nobody
78-35247
2 months ago
79-25981
79 days ago
0-153
2 minutes
35073 joelriou
author:joelriou
 feat(CategoryTheory/Sites): more on Cech cohomology WIP branch --- - [x] depends on: #35035 - [x] depends on: #35026 - [x] depends on: #35038 - [x] depends on: #35140 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) WIP t-category-theory merge-conflict 646/25 Mathlib.lean,Mathlib/Algebra/Category/Grp/Limits.lean,Mathlib/AlgebraicTopology/AlternatingFaceMapComplex.lean,Mathlib/AlgebraicTopology/ExtraDegeneracy.lean,Mathlib/AlgebraicTopology/SimplicialObject/Basic.lean,Mathlib/CategoryTheory/Comma/Arrow.lean,Mathlib/CategoryTheory/Limits/FormalCoproducts/Basic.lean,Mathlib/CategoryTheory/Limits/FormalCoproducts/Cech.lean,Mathlib/CategoryTheory/Limits/FormalCoproducts/EvalOpAddCommGrpCat.lean,Mathlib/CategoryTheory/Limits/FormalCoproducts/Misc.lean,Mathlib/CategoryTheory/Sites/SheafCohomology/CechAddCommGrpCat.lean,Mathlib/CategoryTheory/Subfunctor/Sieves.lean,Mathlib/Topology/Sheaves/Cech/AddCommGrpCat.lean 13 5 ['github-actions', 'mathlib-dependent-issues', 'mathlib-merge-conflicts'] nobody
78-29905
2 months ago
101-42660
101 days ago
0-2
2 seconds
34940 michaellee94
author:michaellee94
 feat: the graph of a continuous function on a $C^n$ manifold is a $C^n$ manifold --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-differential-geometry new-contributor awaiting-author merge-conflict 536/0 Mathlib.lean,Mathlib/Geometry/Manifold/ChartedSpace.lean,Mathlib/Geometry/Manifold/Instances/Graph.lean,Mathlib/Geometry/Manifold/IsManifold/Basic.lean,Mathlib/Topology/Constructions/Graph.lean 5 80 ['botbaki-review', 'github-actions', 'grunweg', 'mathlib-merge-conflicts', 'michaellee94', 'ocfnash'] ocfnash
assignee:ocfnash
78-22575
2 months ago
80-2770
80 days ago
15-5284
15 days
35193 Brian-Nugent
author:Brian-Nugent
 feat(Topology/Closeds): implement category of closed sets in topological spaces I copied over the nice API for working with `TopologicalSpace.Opens` as a category over for `TopologicalSpace.Closeds`. The only thing that did not immediately transfer was `Topology.IsInducing.functorObj` so I omitted it. Based on work of @kim-em --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-topology new-contributor please-adopt merge-conflict awaiting-author 385/0 Mathlib.lean,Mathlib/Topology/Category/TopCat/Closeds.lean,Mathlib/Topology/Category/TopCat/Opens.lean 2 24 ['Brian-Nugent', 'dagurtomas', 'github-actions', 'mathlib-merge-conflicts'] dagurtomas
assignee:dagurtomas
78-21721
2 months ago
63-21794
63 days ago
17-64811
17 days
35332 yisiox
author:yisiox
 feat(Computability): regular expressions match a regular language This PR adds a proof that the language matched by a regular expression is a regular language. This is achieved by the following constructions and proofs of their correctness - A DFA `epsilon` which accepts the empty language - A DFA `char (a : α)` which accepts the language containing only a single symbol - An Epsilon-NFA `concat (M₁ : εNFA α σ₁) (M₂ : εNFA α σ₂)` which accepts the concatenation of the languages of two Epsilon-NFAs - An Epsilon-NFA `kstar (M : εNFA α σ)` which accepts the Kleene star of a language of an Epsilon-NFA The following theorems on closure are added - `IsRegular.zero` - `IsRegular.one` - `IsRegular.top` - `IsRegular.singleton` - `IsRegular.mul` - `IsRegular.kstar` which demonstrates - `IsRegular.matches` --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-computability new-contributor 475/0 Mathlib/Computability/DFA.lean,Mathlib/Computability/EpsilonNFA.lean 2 2 ['github-actions'] nobody
78-11682
2 months ago
unknown
0-0
0 seconds
30408 kckennylau
author:kckennylau
 feat(RingTheory): more algebra instances for HomogeneousLocalization and linear constructors This PR introduces the instance `Algebra R₀ (HomogeneousLocalization 𝒜 x)` as well as two linear constructors `mkₗ` and `Away.mkₗ` that fix the denominator. Zulip discussion: [#mathlib4 > Some algebra instance for graded algebra and homog loc](https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/Some.20algebra.20instance.20for.20graded.20algebra.20and.20homog.20loc/with/544178649) --- Split from #26061. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-ring-theory merge-conflict 65/20 Mathlib/RingTheory/GradedAlgebra/HomogeneousLocalization.lean 1 6 ['github-actions', 'mariainesdff', 'mathlib-merge-conflicts'] mariainesdff
assignee:mariainesdff
78-8719
2 months ago
206-37843
206 days ago
17-72413
17 days
30431 kckennylau
author:kckennylau
 feat(RingTheory): a homogeneous submodule is the span of its homogeneous elements --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-ring-theory merge-conflict 22/0 Mathlib/RingTheory/GradedAlgebra/Homogeneous/Ideal.lean,Mathlib/RingTheory/GradedAlgebra/Homogeneous/Submodule.lean 2 9 ['alreadydone', 'github-actions', 'kckennylau', 'mariainesdff', 'mathlib-merge-conflicts'] mariainesdff
assignee:mariainesdff
78-8718
2 months ago
200-27480
200 days ago
23-21820
23 days
35834 homeowmorphism
author:homeowmorphism
 feat(Mathlib/GroupTheory/PresentedGroup): every group has a presentation We show that every group has a presentation defined by taking the free group with all of the group elements as the generators, and defining the relations as the kernel of the induced subjective homomorphism from that free group to the group itself. Use of AI: This has been vibe-coded with GPT-Codex-5.3, was updated through review, and was double-checked by the author. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor t-group-theory large-import awaiting-author LLM-generated 29/1 Mathlib/GroupTheory/PresentedGroup.lean 1 15 ['copilot-pull-request-reviewer', 'euprunin', 'github-actions', 'homeowmorphism', 'mathlib-bors', 'plp127', 'tb65536'] tb65536
assignee:tb65536
78-1896
2 months ago
78-1896
78 days ago
4-30613
4 days
33501 SnirBroshi
author:SnirBroshi
 feat(Combinatorics/SimpleGraph/Degree): degrees for infinite graphs Define `ENat` versions of `degree`/`minDegree`/`maxDegree` called `edegree`/`minEDegree`/`maxEDegree` respectively. --- The `e` prefix matches the existing `edist` and `ediam`. I will split this PR, but first I'd like to get positive signals on the concept. TODO (future work): `tsum G.edegree = 2 * G.edgeSet.encard` and then `ENat.card V * G.minEDegree ≤ 2 * G.edgeSet.encard ≤ ENat.card V * G.maxEDegree` (can we avoid topology [somehow](https://leanprover.zulipchat.com/#narrow/channel/217875-Is-there-code-for-X.3F/topic/Summing.20.60ENat.60s.20without.20topology/with/588756615)?) - [x] depends on: #38244 - [x] depends on: #38354 - [x] depends on: #38355 - [ ] depends on: #38356 - [ ] depends on: #38612 - [ ] depends on: #38747 Note: this PR used to be a refactor of the existing `degree`/`maxDegree`/`minDegree`, see the edits of this description. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) large-import t-combinatorics blocked-by-other-PR merge-conflict awaiting-author 352/259 Mathlib.lean,Mathlib/Combinatorics/SimpleGraph/Basic.lean,Mathlib/Combinatorics/SimpleGraph/Copy.lean,Mathlib/Combinatorics/SimpleGraph/Degree.lean,Mathlib/Combinatorics/SimpleGraph/Finite.lean,Mathlib/Order/ConditionallyCompleteLattice/Finset.lean,Mathlib/Order/SuccPred/CompleteLinearOrder.lean,Mathlib/Order/WithBot.lean 22 35 ['IvanRenison', 'SnirBroshi', 'YaelDillies', 'b-mehta', 'github-actions', 'mathlib-dependent-issues', 'mathlib-merge-conflicts', 'mathlib4-merge-conflict-bot', 'vlad902'] nobody
78-1434
2 months ago
110-51079
110 days ago
14-72041
14 days
33808 seewoo5
author:seewoo5
 feat(Manifold/MFDeriv): add fun_prop to `MDifferentiable` --- Add FunProp to `MDifferentiable`. For example, the following works (when `F'` is normed `𝕜`-algebra) ```lean example (hp : MDifferentiable I 𝓘(𝕜, F') p) (hq : MDifferentiable I 𝓘(𝕜, F') q) : MDifferentiable I 𝓘(𝕜, F') ((p * q + p - q) * q * p) := by fun_prop ``` Motivated from [sphere packing project](https://github.com/thefundamentaltheor3m/Sphere-Packing-Lean). [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) awaiting-author t-differential-geometry merge-conflict 15/0 Mathlib/Geometry/Manifold/MFDeriv/Basic.lean,Mathlib/Geometry/Manifold/MFDeriv/Defs.lean,Mathlib/Geometry/Manifold/MFDeriv/SpecificFunctions.lean 3 9 ['github-actions', 'grunweg', 'mathlib-merge-conflicts', 'seewoo5'] nobody
78-1310
2 months ago
132-48022
132 days ago
0-43623
12 hours
36210 vbeffara
author:vbeffara
 feat(Combinatorics/SimpleGraph): definitions of graph contraction and graph minor A contraction is the image of a graph through a surjective function with connected fibers, and a minor is a contraction of a subgraph. This PR shows that being a contraction is transitive, but does not show the same for minors because the proof is more involved, it will be in a subsequent PR. The definitions are in `Prop` and do not contain data, but I'm not sure if that was the right choice. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-combinatorics new-contributor awaiting-author 151/0 Mathlib.lean,Mathlib/Combinatorics/SimpleGraph/Contraction.lean,Mathlib/Combinatorics/SimpleGraph/Minor.lean 3 8 ['YaelDillies', 'github-actions', 'mathlib-merge-conflicts', 'robin-carlier', 'vbeffara'] b-mehta
assignee:b-mehta
77-80652
2 months ago
24-22915
24 days ago
53-33900
53 days
34484 grunweg
author:grunweg
 test: debugging mfderiv_smul erws Not meant for landing. --- - [ ] depends on: #34262 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-differential-geometry blocked-by-other-PR WIP merge-conflict 43/0 Mathlib/Geometry/Manifold/MFDeriv/SpecificFunctions.lean 1 3 ['github-actions', 'mathlib-merge-conflicts', 'mathlib4-dependent-issues-bot'] nobody
77-79150
2 months ago
115-30625
115 days ago
0-252
4 minutes
35210 kim-em
author:kim-em
 chore: use @[to_dual] in CompleteLattice extras and Set.Lattice This PR uses `@[to_dual]` to auto-generate dual theorems in `Order.CompleteLattice.Lemmas`, `Order.CompleteLattice.Finset`, and `Data.Set.Lattice`, deleting hand-written dual versions. [Diff relative to previous PR](https://github.com/kim-em/mathlib4/compare/kim/to-dual-complete-lattice...kim/to-dual-complete-lattice-extras) - [ ] depends on: #35209 🤖 Prepared with Claude Code LLM-generated merge-conflict blocked-by-other-PR 217/579 Mathlib/Data/Set/Lattice.lean,Mathlib/Order/CompleteLattice/Finset.lean,Mathlib/Order/CompleteLattice/Lemmas.lean,Mathlib/Tactic/SetLike.lean 7 6 ['github-actions', 'mathlib-dependent-issues', 'mathlib-merge-conflicts'] nobody
77-79146
2 months ago
17-45955
17 days ago
5-31322
5 days
35213 kim-em
author:kim-em
 chore: use @[to_dual] in ConditionallyCompleteLattice This PR adds `@[to_dual]` annotations across all `ConditionallyCompleteLattice` files: `Defs`, `Basic`, `Indexed`, `Finset`, and `Group`. Auto-generates dual theorems and deletes hand-written versions. (Absorbs the former PR #35212.) [Diff relative to #35209](https://github.com/kim-em/mathlib4/compare/kim/to-dual-complete-lattice...kim/to-dual-ccl-extended) - [ ] depends on: #35209 - [ ] depends on: #35211 🤖 Prepared with Claude Code merge-conflict LLM-generated blocked-by-other-PR 189/485 Mathlib/Order/Bounds/Basic.lean,Mathlib/Order/CompleteLattice/Basic.lean,Mathlib/Order/CompleteLattice/Defs.lean,Mathlib/Order/ConditionallyCompleteLattice/Defs.lean 4 5 ['github-actions', 'mathlib-dependent-issues', 'mathlib-merge-conflicts'] nobody
77-79144
2 months ago
98-83061
98 days ago
0-963
16 minutes
35214 kim-em
author:kim-em
 chore: use @[to_dual] in GaloisConnection and Interval.Set.Disjoint This PR adds `@[to_dual]` annotations to 9 theorems in `GaloisConnection/Basic.lean` and 1 in `Interval/Set/Disjoint.lean`, deleting the hand-written dual theorems that are now auto-generated. In `GaloisConnection/Basic.lean`, the entire `section SemilatticeInf` block (containing `u_inf`) is deleted since `l_sup` now generates it via `@[to_dual]`. Similarly for `u_iInf`, `u_iInf₂`, `u_sInf`, and several bounds/image lemmas. [Diff relative to #35213](https://github.com/kim-em/mathlib4/compare/kim/to-dual-ccl-extended...kim/to-dual-galois-connection) - [ ] depends on: #35213 🤖 Prepared with Claude Code blocked-by-other-PR merge-conflict LLM-generated 204/526 Mathlib/Algebra/Module/Torsion/Basic.lean,Mathlib/Order/Bounds/Basic.lean,Mathlib/Order/CompleteLattice/Basic.lean,Mathlib/Order/CompleteLattice/Defs.lean,Mathlib/Order/ConditionallyCompleteLattice/Defs.lean,Mathlib/Order/GaloisConnection/Basic.lean,Mathlib/Order/Interval/Set/Disjoint.lean,Mathlib/Topology/Order.lean 8 5 ['github-actions', 'mathlib-dependent-issues', 'mathlib-merge-conflicts'] nobody
77-79142
2 months ago
98-83060
98 days ago
0-663
11 minutes
35547 Ruben-VandeVelde
author:Ruben-VandeVelde
 chore: tidy various files --- As usual, `simp`s didn't seem slow. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) awaiting-author merge-conflict 83/117 Mathlib/Algebra/Group/Int/Defs.lean,Mathlib/Algebra/LinearRecurrence.lean,Mathlib/Algebra/Order/Ring/Unbundled/Basic.lean,Mathlib/AlgebraicGeometry/AffineScheme.lean,Mathlib/AlgebraicGeometry/Morphisms/Smooth.lean,Mathlib/AlgebraicGeometry/Properties.lean,Mathlib/AlgebraicGeometry/ZariskisMainTheorem.lean,Mathlib/Analysis/Complex/CoveringMap.lean,Mathlib/Analysis/Complex/MeanValue.lean,Mathlib/CategoryTheory/Comma/Over/Basic.lean,Mathlib/Data/NNReal/Basic.lean,Mathlib/Data/Set/Dissipate.lean,Mathlib/Data/Set/PowersetCard.lean,Mathlib/Geometry/Euclidean/Angle/Bisector.lean,Mathlib/LinearAlgebra/DirectSum/Finsupp.lean,Mathlib/LinearAlgebra/JordanChevalley.lean,Mathlib/MeasureTheory/Measure/PreVariation.lean,Mathlib/MeasureTheory/Measure/SubFinite.lean,Mathlib/MeasureTheory/VectorMeasure/Variation/Defs.lean,Mathlib/Order/ConditionallyCompletePartialOrder/Indexed.lean,Mathlib/Probability/Distributions/Cauchy.lean,Mathlib/RingTheory/Etale/QuasiFinite.lean,Mathlib/RingTheory/Ideal/Pointwise.lean,Mathlib/RingTheory/Polynomial/Subring.lean,Mathlib/RingTheory/Smooth/IntegralClosure.lean,Mathlib/RingTheory/UniqueFactorizationDomain/ClassGroup.lean,Mathlib/RingTheory/Unramified/LocalStructure.lean,Mathlib/RingTheory/ZariskisMainTheorem.lean,Mathlib/Tactic/ComputeAsymptotics/Multiseries/Corecursion.lean,Mathlib/Tactic/ComputeAsymptotics/Multiseries/Majorized.lean,Mathlib/Topology/Algebra/IsUniformGroup/Defs.lean,Mathlib/Topology/Algebra/MulAction.lean 32 14 ['github-actions', 'grunweg', 'mathlib-merge-conflicts', 'vihdzp'] nobody
77-79135
2 months ago
91-19912
91 days ago
0-67842
18 hours
35808 xroblot
author:xroblot
 feat(RamificationInertia): splitting in the inertia field --- - [ ] depends on: #35802 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) blocked-by-other-PR large-import t-algebra merge-conflict
label:t-algebra$
 501/12 Mathlib.lean,Mathlib/Algebra/Group/Subgroup/Basic.lean,Mathlib/Data/ZMod/QuotientRing.lean,Mathlib/NumberTheory/RamificationInertia/Basic.lean,Mathlib/NumberTheory/RamificationInertia/HilbertTheory.lean,Mathlib/RingTheory/FiniteType.lean,Mathlib/RingTheory/Finiteness/Basic.lean,Mathlib/RingTheory/Ideal/Quotient/HasFiniteQuotients.lean 8 4 ['github-actions', 'joneugster', 'mathlib-dependent-issues', 'mathlib-merge-conflicts'] nobody
77-79119
2 months ago
85-30824
85 days ago
0-2518
41 minutes
34501 eric-wieser
author:eric-wieser
 chore(Data/Fintype/Induction): add a workaround for a bug in `induction` This works around leanprover/lean4#4246, as Zulip threads frequently run up against this. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) awaiting-author t-meta please-adopt 15/1 Mathlib/Data/Fintype/Option.lean 1 3 ['github-actions', 'joneugster'] joneugster
assignee:joneugster
77-45648
2 months ago
112-25991
112 days ago
2-59629
2 days
32989 kim-em
author:kim-em
 fix(Tactic/Simps): skip @[defeq] inference for non-exposed definitions This PR makes `@[simps]` check whether the source definition's body is exposed before calling `inferDefEqAttr`. When the body is not exposed, we skip the `@[defeq]` inference to avoid validation errors. Without this fix, using `@[simps]` on a definition that is not `@[expose]`d produces an error like: ``` Theorem Foo_bar has a `rfl`-proof and was thus inferred to be `@[defeq]`, but validating that attribute failed: Not a definitional equality: the left-hand side ... is not definitionally equal to the right-hand side ... Note: This theorem is exported from the current module. This requires that all definitions that need to be unfolded to prove this theorem must be exposed. ``` The fix checks `(← getEnv).setExporting true |>.find? cfg.srcDeclName |>.any (·.hasValue)` to determine if the definition body is visible in the public scope, and only calls `inferDefEqAttr` if it is. 🤖 Prepared with Claude Code t-meta awaiting-author LLM-generated please-adopt merge-conflict 51/3 Mathlib/CategoryTheory/Triangulated/TStructure/TruncLTGE.lean,Mathlib/Tactic/Simps/Basic.lean,MathlibTest/SimpsModule.lean 4 17 ['JovanGerb', 'Vierkantor', 'github-actions', 'joneugster', 'kim-em', 'mathlib-merge-conflicts'] nobody
77-43527
2 months ago
99-56595
99 days ago
37-18737
37 days
35569 goliath-klein
author:goliath-klein
 refactor(PiTensorProduct/{InjectiveNorm, ProjectiveNorm}): deprecate `injectiveSeminorm` This PR: * Deprecates `PiTensorProduct.injectiveSeminorm` and supporting lemmas. * Moves the theory of `liftEquiv` from InjectiveSeminorm.lean to ProjectiveSeminorm.lean. No changes are introduced beyond adding deprecation notices, adapting docstrings, and moving material between files. The PR leaves InjectiveSeminorm.lean almost empty. A new implementation of `injectiveSeminorm`, one which reflects the common mathematical definition, is to be done. This is the third in a series of three PRs with the goal to [deprecate `PiTensorProuduct.injectiveSeminorm`](https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/injectiveSeminorm/with/568798633). --- - [ ] depends on: #35567 - [ ] depends on: #35568 Deprecations: - injectiveSeminorm - dualSeminorms_bounded - injectiveSeminorm_apply - norm_eval_le_injectiveSeminorm - injectiveSeminorm_le_projectiveSeminorm - injectiveSeminorm_tprod_le Preliminary work toward a reimplementation is at #33969. I've added Davood and myself to the "Authors" field, as we have now significantly refactored this module. Co-authored-by: Davood H. T. Tehrani [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor merge-conflict blocked-by-other-PR 290/366 Mathlib/Analysis/Normed/Module/PiTensorProduct/InjectiveSeminorm.lean,Mathlib/Analysis/Normed/Module/PiTensorProduct/ProjectiveSeminorm.lean 3 6 ['github-actions', 'mathlib-dependent-issues', 'mathlib-merge-conflicts'] nobody
77-40666
2 months ago
35-47984
35 days ago
52-16011
52 days
8479 alexjbest
author:alexjbest
 feat: use leaff in CI [Leaff](https://github.com/alexjbest/leaff) is an experimental lean-diff tool, this PR is to experiment with adding it as a CI step. --- I'm not sure yet if it is best to have this always run or only run on request (like bench). If it is always run should it post a comment or simply leave its output it the actions log (maybe as a summary object) the current iteration runs and updates a sticky comment with the latest result [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict WIP awaiting-author 340/0 .github/workflows/bors.yml,.github/workflows/build.yml,.github/workflows/build.yml.in,.github/workflows/build_fork.yml 4 13 ['alexjbest', 'fpvandoorn', 'github-actions', 'grunweg', 'kim-em', 'mathlib-bors', 'urkud'] nobody
77-35192
2 months ago
917-12566
917 days ago
0-26
26 seconds
13483 adomani
author:adomani
 feat: automatically replace deprecations This PR introduces `lake exe update_deprecations` that uses the cache to automatically replace deprecated declarations with the corresponding un-deprecated one. The script handles namespacing, replacing a possibly non-fully-qualified, deprecated name with the fully-qualified non-deprecated name. It is also possible to use ```bash lake exe update_deprecations --mods One.Two.Three,Dd.Ee.Ff ``` to limit the scope of the replacements to the modules `One.Two.Three` and `Dd.Ee.Ff`. This is intended to be a first step in automating updates: combining this with a linter that emits appropriate warnings, the functionality of `lake exe update_deprecations` can be extended to perform more complicated updates. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict awaiting-author t-meta 306/0 Mathlib.lean,Mathlib/Tactic.lean,Mathlib/Tactic/UpdateDeprecations.lean,MathlibTest/UpdateDeprecations.lean,lakefile.lean,scripts/README.md,scripts/update_deprecations.lean 7 18 ['YaelDillies', 'adomani', 'fpvandoorn', 'github-actions', 'j-loreaux', 'jcommelin', 'leanprover-community-bot-assistant', 'mathlib-bors', 'sgouezel'] joneugster
assignee:joneugster
77-35164
2 months ago
557-26270
557 days ago
34-80803
34 days
14313 grhkm21
author:grhkm21
 feat(RepresentationTheory/FdRep): FdRep is a full subcategory of Rep ``` /-- Equivalence between `FDRep` and the full subcategory of finite dimensional `Rep`. -/ def equivFiniteDimensional : FDRep k G ≌ FullSubcategory (fun V : Rep k G ↦ FiniteDimensional k V) ``` merge-conflict t-algebra t-category-theory new-contributor
label:t-algebra$
 47/8 Mathlib/RepresentationTheory/FDRep.lean 1 21 ['fpvandoorn', 'github-actions', 'grhkm21', 'joelriou', 'kim-em', 'mathlib-bors'] nobody
77-35141
2 months ago
670-1165
670 days ago
4-83177
4 days
14712 astrainfinita
author:astrainfinita
 perf: change instance priority and order about `OfNat` --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict slow-typeclass-synthesis t-algebra
label:t-algebra$
 49/20 Mathlib/Algebra/Group/Nat.lean,Mathlib/Algebra/Group/ZeroOne.lean,Mathlib/Algebra/Homology/Embedding/Basic.lean,Mathlib/Algebra/Tropical/Basic.lean,Mathlib/Data/BitVec.lean,Mathlib/Data/Nat/Cast/Defs.lean,Mathlib/Data/Rat/Defs.lean,Mathlib/Data/UInt.lean,Mathlib/NumberTheory/ArithmeticFunction.lean 9 26 ['MichaelStollBayreuth', 'astrainfinita', 'eric-wieser', 'fpvandoorn', 'github-actions', 'j-loreaux', 'leanprover-bot', 'mathlib-bors'] nobody
77-35122
2 months ago
652-13292
652 days ago
20-15089
20 days
17627 hrmacbeth
author:hrmacbeth
 feat: universal properties of vector bundle constructions Characterizations for the smoothness of maps into the total spaces of (1) the direct sum of two vector bundles; (2) the pullback of a vector bundle. This gap in the library was exposed by #17358. --- - [x] depends on: #22804 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-differential-geometry 311/9 Mathlib/Data/Bundle.lean,Mathlib/Geometry/Manifold/VectorBundle/Basic.lean,Mathlib/Geometry/Manifold/VectorBundle/Pullback.lean,Mathlib/Topology/FiberBundle/Constructions.lean 4 26 ['PatrickMassot', 'fpvandoorn', 'github-actions', 'grunweg', 'hrmacbeth', 'j-loreaux', 'leanprover-community-bot-assistant', 'mathlib-bors', 'mathlib4-dependent-issues-bot', 'sgouezel'] grunweg
assignee:grunweg
77-35110
2 months ago
337-34849
337 days ago
91-68302
91 days
19275 eric-wieser
author:eric-wieser
 fix: if nolint files change, do a full rebuild Otherwise CI will succeed when removing entries from the file, but fail later when someone changes something unrelated. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict 8/0 lakefile.lean 1 22 ['YaelDillies', 'adomani', 'eric-wieser', 'fpvandoorn', 'github-actions', 'grunweg', 'mathlib-bors'] nobody
77-35093
2 months ago
548-75728
548 days ago
0-214
3 minutes
34650 vihdzp
author:vihdzp
 feat: redefine `Polynomial.toSubring` with better def-eqs We redefine [`Polynomial.toSubring`](https://leanprover-community.github.io/mathlib4_docs/Mathlib/RingTheory/Polynomial/Basic.html#Polynomial.toSubring) in such a way that `(p.toSubring T _).coeff n = p.coeff n` definitionally. We then golf the API. --- - [x] depends on: #34661 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-ring-theory merge-conflict 63/73 Mathlib/Algebra/Polynomial/AlgebraMap.lean,Mathlib/Algebra/Polynomial/Basic.lean,Mathlib/Algebra/Ring/Subring/IntPolynomial.lean,Mathlib/FieldTheory/Fixed.lean,Mathlib/RingTheory/Algebraic/Integral.lean,Mathlib/RingTheory/Polynomial/Subring.lean 6 15 ['YaelDillies', 'erdOne', 'eric-wieser', 'github-actions', 'mathlib-bors', 'mathlib-dependent-issues', 'mathlib-merge-conflicts', 'vihdzp'] nobody
77-32011
2 months ago
100-24883
100 days ago
0-80144
22 hours
28072 kckennylau
author:kckennylau
 feat(RingTheory/Valuation): make tactic rw_val_equiv Co-authored by Aaron Liu and Bhavik Mehta. A tactic to rewrite relations such as `max (v₁ x) (v₁ y) * v₁ z < 1` into `max (v₂ x) (v₂ y) * v₂ z < 1` , given `h : v₁.IsEquiv v₂`. Allowed relations are `≤`, `<`, `=`, `≠`. Allowed operations are: `0`, `1`, `v₁ r`, `⁻¹`, `^` (both `ℕ` and `ℤ`), `*`, `/`, `min`, `max`. Examples: ```lean example {R Γ₁ Γ₂ : Type} [Ring R] [LinearOrderedCommMonoidWithZero Γ₁] [LinearOrderedCommMonoidWithZero Γ₂] {v₁ : Valuation R Γ₁} {v₂ : Valuation R Γ₂} (h : v₁.IsEquiv v₂) {y z : R} : {x | v₁ x ^ 2 * min (v₁ y) (v₁ z) ≤ 1} = {x | v₂ x ^ 2 * min (v₂ y) (v₂ z) ≤ 1} := by rw_val_equiv h ``` It is also possible to use `←` to rewrite in the opposite direction, and to use `at h1 h3 ⊢` to specify which hypotheses (and/or goal) to rewrite, similar to the syntax of `rw`. There is also `rwa_val_equiv` to work like `rwa`. --- Zulip: [#Is there code for X? > Tactics for comparing equivalent valuations](https://leanprover.zulipchat.com/#narrow/channel/217875-Is-there-code-for-X.3F/topic/Tactics.20for.20comparing.20equivalent.20valuations) [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) awaiting-author t-ring-theory merge-conflict 525/34 Mathlib/RingTheory/Valuation/Basic.lean,MathlibTest/Simproc/ValEquiv.lean 2 52 ['b-mehta', 'erdOne', 'eric-wieser', 'github-actions', 'kckennylau', 'mathlib-merge-conflicts', 'mathlib4-merge-conflict-bot', 'pechersky', 'plp127'] erdOne
assignee:erdOne
77-26180
2 months ago
188-22363
188 days ago
99-25855
99 days
33592 nielstron
author:nielstron
 feat(Computability/ContextFreeGrammar): mapping between two types of nonterminal symbols This PR picks up https://github.com/leanprover-community/mathlib4/pull/15895 and resolves the failing lemma by redefining Good symbols. --- I checked that https://github.com/leanprover-community/mathlib4/pull/13514 builds correctly when based on this build. PR for that is #33599 This is my first contribution please let me know of any changes I should outline. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) awaiting-author t-computability new-contributor 160/0 Mathlib/Computability/ContextFreeGrammar.lean 1 34 ['YaelDillies', 'github-actions', 'madvorak', 'nielstron'] nobody
77-24109
2 months ago
126-52636
126 days ago
10-68503
10 days
35144 daniel-carranza
author:daniel-carranza
 feat(CategoryTheory/Enriched): tensor product of enriched categories For a braided monoidal category `V`, defines the tensor product of `V`-categories `C` and `D`, and shows that the type of `V`-functors out of the tensor product `C \times D` is equivalent to the type of "enriched bifunctors" `EnrichedBifunctor V C D`. --- This work originates from infinity-cosmos project, where it is used to formalize the notion of cotensors in an enriched category. There are some additional coherence lemmas in a braided monoidal category which have been added. Currently, line 209 violates the style guideline that terminal simp calls should not be squeezed. When I tried to replace this with a single `simp`, I get an error message: `maximum recursion depth has been reached`. Any suggestions (either with this or anything else) are greatly appreciated - thank you! [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor t-category-theory infinity-cosmos awaiting-author 333/0 Mathlib.lean,Mathlib/CategoryTheory/Enriched/TensorProductCategory.lean,Mathlib/CategoryTheory/Monoidal/Braided/Basic.lean 3 12 ['daniel-carranza', 'emilyriehl', 'github-actions', 'joelriou', 'robin-carlier'] nobody
77-19816
2 months ago
100-8911
100 days ago
0-145
2 minutes
34236 homeowmorphism
author:homeowmorphism
 feat(GroupTheory/FinitelyPresentedGroup): add finitely presented groups Formulation of finitely presented groups feat(GroupTheory/FinitelyPresentedGroup): add finitely presented groups We define the notion of `IsFinitelyPresented` with equivalent datatype notions, what it means for a subgroup to be finitely generated in the normal closure, and some instances of finitely presented groups. This started as an ItaLean2025 project. The related Zulip thread is here: https://leanprover.zulipchat.com/#narrow/channel/541885-ItaLean-2025/topic/Projects.3A.20Finitely.20Presented.20Groups/with/567565752. Use of AI: * Aristotle was used for giving a preliminary proof of some statements as this is my first contribution and I wanted to understand how to prove things; they have since been changed. * GPT-5.2 was used to generate some of the proof sub-statements for efficiency once the mathematical blueprints of the proofs have been worked out. * GPT-5.3 was used to rapidly refactor the code. Human review by PR author in-progress, but got to a point where it would be good to get external input. * GPT-5.4 was used to refactor the variables. Human PR author then rewrote the whole thing. --- - [x] depends on: #34580 - [x] depends on: #34624 - [x] depends on: #35033 - [x] depends on: #35029 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-group-theory new-contributor merge-conflict blocked-by-other-PR 459/3 Mathlib.lean,Mathlib/GroupTheory/FinitelyPresentedGroup.lean 5 72 ['copilot-pull-request-reviewer', 'eric-wieser', 'github-actions', 'grunweg', 'homeowmorphism', 'kbuzzard', 'mathlib-bors', 'mathlib-dependent-issues', 'mathlib-merge-conflicts', 'tb65536'] nobody
77-18102
2 months ago
64-995
64 days ago
0-4650
1 hour
26061 kckennylau
author:kckennylau
 (WIP) feat(AlgebraicGeometry): define Projective Space This defines the projective space over a scheme, indexed by an arbitrary type. --- Zulip discussion: [#maths > Projective Space](https://leanprover.zulipchat.com/#narrow/channel/116395-maths/topic/Projective.20Space/with/524057860) I am currently using this PR as a hub for future PR's that will be split from this PR, so it is currently WIP. - [x] depends on: #30355 - [x] depends on: #30173 - [x] depends on: #30302 - [x] depends on: #30312 - [x] depends on: #30322 - [x] depends on: #30334 - [x] depends on: #30336 - [x] depends on: #30365 - [x] depends on: #30367 - [x] depends on: #30399 - [ ] depends on: #30379 - [ ] depends on: #36226 - [ ] depends on: #30352 - [ ] depends on: #30408 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict WIP t-algebraic-geometry blocked-by-other-PR 2009/0 Mathlib.lean,Mathlib/AlgebraicGeometry/ProjectiveSpace.lean 2 16 ['callesonne', 'erdOne', 'github-actions', 'kckennylau', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] erdOne
assignee:erdOne
77-17482
2 months ago
227-82490
227 days ago
110-42892
110 days
24434 joelriou
author:joelriou
 feat(CategoryTheory): effectiveness of descent (This is very much a draft, it will be split in multiple PRs later.) Co-authored-by: Christian Merten [christian@merten.dev](mailto:christian@merten.dev) --- - [ ] depends on: #35452 - [ ] depends on: #35393 - [ ] depends on: #35396 - [ ] depends on: #35401 - [x] depends on: #24411 - [x] depends on: #24382 - [x] depends on: #25971 - [x] depends on: #13539 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict WIP t-category-theory 4052/66 Mathlib.lean,Mathlib/CategoryTheory/Bicategory/Adjunction/Adj.lean,Mathlib/CategoryTheory/Bicategory/Adjunction/BaseChange.lean,Mathlib/CategoryTheory/Bicategory/Adjunction/Basic.lean,Mathlib/CategoryTheory/Bicategory/Adjunction/Mate.lean,Mathlib/CategoryTheory/Bicategory/Functor/Cat.lean,Mathlib/CategoryTheory/Bicategory/Functor/LocallyDiscrete.lean,Mathlib/CategoryTheory/Bicategory/Functor/Strict.lean,Mathlib/CategoryTheory/Bicategory/Opposite.lean,Mathlib/CategoryTheory/CommSq.lean,Mathlib/CategoryTheory/Limits/Shapes/Pullback/CommSq.lean,Mathlib/CategoryTheory/Sites/Descent/DescentData.lean,Mathlib/CategoryTheory/Sites/Descent/DescentDataAsCoalgebra.lean,Mathlib/CategoryTheory/Sites/Descent/DescentDataDoublePrime.lean,Mathlib/CategoryTheory/Sites/Descent/DescentDataPrime.lean,Mathlib/CategoryTheory/Sites/Descent/IsPrestack.lean,Mathlib/CategoryTheory/Sites/Descent/IsStack.lean,Mathlib/CategoryTheory/Sites/Descent/ModuleCat.lean,Mathlib/CategoryTheory/Sites/Descent/PullbackStruct.lean 19 23 ['alreadydone', 'callesonne', 'chrisflav', 'github-actions', 'joelriou', 'leanprover-community-bot-assistant', 'mathlib-dependent-issues', 'yuma-mizuno'] nobody
77-16151
2 months ago
unknown
0-0
0 seconds
35151 alreadydone
author:alreadydone
 WIP: group scheme structure on Weierstrass curve --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) WIP t-algebraic-geometry 620/0 Mathlib/AlgebraicGeometry/EllipticCurve/Projective/GroupScheme.lean 1 3 ['github-actions', 'joelriou'] nobody
77-15413
2 months ago
unknown
0-0
0 seconds
27226 xcloudyunx
author:xcloudyunx
 feat(Combinatorics/SimpleGraph): Add Subgraph.inclusion_edge_apply_coe and inclusion_edgeSet_apply_coe This PR continues the work from #25248. Original PR: https://github.com/leanprover-community/mathlib4/pull/25248 awaiting-author t-combinatorics new-contributor merge-conflict 14/0 Mathlib/Combinatorics/SimpleGraph/Subgraph.lean 1 4 ['b-mehta', 'github-actions', 'mathlib-merge-conflicts', 'xcloudyunx'] b-mehta
assignee:b-mehta
77-11209
2 months ago
283-77755
283 days ago
25-83942
25 days
29934 smmercuri
author:smmercuri
 feat(Field/WithAbs): the lift of a ring homomorphism from `WithAbs v` to `WithAbs w` to their completions If `σ` is a compatible ring homomomorphism between `WithAbs v` and `WithAbs w` then this extends to a natural ring homomorphism between completions `v.Completion` and `w.Completion`. Also fix some defeq abuse in `Field/WithAbs`. --- - [x] depends on: #29969 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) WIP FLT large-import merge-conflict 41/3 Mathlib/Analysis/Normed/Field/Basic.lean,Mathlib/Analysis/Normed/Field/WithAbs.lean,Mathlib/Analysis/Normed/Ring/Basic.lean,Mathlib/Analysis/Normed/Ring/WithAbs.lean,Mathlib/Topology/MetricSpace/Completion.lean 5 5 ['github-actions', 'mathlib-merge-conflicts', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
77-7168
2 months ago
240-44164
240 days ago
0-2230
37 minutes
33688 Citronhat
author:Citronhat
 feat(PMF): add expectation lemmas for Poisson PMF This PR adds some basic results about the Poisson distribution, its `PMF`, and its expectation. **New lemmas:** * `poissonPMF_apply` — an unfolding lemma for `poissonPMF`. * `poissonPMFReal_mul_eq_succ_mul` — the standard recursion identity for the Poisson mass function. * `poissonPMFReal_hasSum_nmul` — shows that `fun n ↦ poissonPMFReal r n * n` has sum `r`. * `poissonPMF_tsum_nmul` — the corresponding identity at the level of the `PMF`. * `poissonPMF_coe_tsum_nmul` — the same result after coercion to `ℝ`. Both `ℝ`-valued and `ℝ≥0∞`-valued formulations are included so that these results can be used conveniently in both Lebesgue and Bochner integration contexts. new-contributor t-measure-probability awaiting-author merge-conflict 21/0 Mathlib/Probability/Distributions/Poisson.lean 1 11 ['Citronhat', 'DavidLedvinka', 'github-actions', 'mathlib-merge-conflicts', 'urkud'] urkud
assignee:urkud
76-79589
2 months ago
88-7838
88 days ago
47-76876
47 days
34005 MSpill
author:MSpill
 feat: inverse function theorem for manifolds (concrete version) Proves the inverse function theorem for manifolds: given manifolds $M, N$ and a $C^n$ map $f : M \to N$ whose differential is a linear isomorphism at $p \in M$, then $f$ is a local diffeomorphism at $p$, provided that both $p$ and its image are interior points. The proof proceeds in 4 main steps: 1. Define composition of partial diffeomorphisms 2. Show that the extended chart at an interior point can be restricted to an open set on which it is a partial diffeomorphism, viewing the model vector space as a manifold modelled on itself trivially 3. Use the inverse function theorem (applied to $f$ written in coordinates) to obtain a partial diffeomorphism between model vector spaces 4. Compose with chart diffeomorphisms to obtain a partial diffeomorphism between the manifolds. ------ [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) awaiting-author t-differential-geometry new-contributor merge-conflict 232/3 Mathlib/Geometry/Manifold/LocalDiffeomorph.lean 1 12 ['MSpill', 'github-actions', 'grunweg', 'mathlib-merge-conflicts'] grunweg
assignee:grunweg
76-79344
2 months ago
127-18457
127 days ago
0-1082
18 minutes
35602 JovanGerb
author:JovanGerb
 feat: replace `IsWellFounded` with `WellFounded` This PR is an attempt to deprecate `IsWellFounded`. The reason it that it is entirely equivalent to `WellFounded`, with the only difference being that `IsWellFounded` is a class. This PR instead marks `WellFounded` as a class. What is annoying is that you sometimes want the API to use it as a class and sometimes as an explicit argument, and it's not entirely clear to me what the best compromise is: duplicating API, or just picking one form and using it. For example, `WellFounded.min`. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-data awaiting-author merge-conflict 430/474 Archive/Imo/Imo1988Q6.lean,Mathlib/Algebra/EuclideanDomain/Defs.lean,Mathlib/Algebra/Group/UniqueProds/Basic.lean,Mathlib/Algebra/Lie/Engel.lean,Mathlib/Algebra/Lie/Subalgebra.lean,Mathlib/Algebra/Lie/Submodule.lean,Mathlib/AlgebraicTopology/SimplicialSet/AnodyneExtensions/Pairing.lean,Mathlib/CategoryTheory/CofilteredSystem.lean,Mathlib/CategoryTheory/Subobject/ArtinianObject.lean,Mathlib/CategoryTheory/Subobject/NoetherianObject.lean,Mathlib/Computability/Partrec.lean,Mathlib/Data/DFinsupp/WellFounded.lean,Mathlib/Data/ENat/Basic.lean,Mathlib/Data/Fin/Tuple/BubbleSortInduction.lean,Mathlib/Data/Finset/Dedup.lean,Mathlib/Data/Finset/Defs.lean,Mathlib/Data/Finsupp/MonomialOrder/DegLex.lean,Mathlib/Data/Finsupp/WellFounded.lean,Mathlib/Data/Fintype/Card.lean,Mathlib/Data/List/Chain.lean,Mathlib/Data/List/Cycle.lean,Mathlib/Data/Multiset/Defs.lean,Mathlib/Data/Nat/Cast/WithTop.lean,Mathlib/Data/Nat/WithBot.lean,Mathlib/Data/Prod/Lex.lean,Mathlib/Data/Rel.lean,Mathlib/Data/Set/Finite/Lemmas.lean,Mathlib/Data/Sum/Order.lean,Mathlib/GroupTheory/ArchimedeanDensely.lean,Mathlib/LinearAlgebra/ExteriorPower/Basis.lean,Mathlib/Logic/Hydra.lean,Mathlib/Order/Antisymmetrization.lean,Mathlib/Order/Cofinal.lean,Mathlib/Order/CompactlyGenerated/Basic.lean,Mathlib/Order/ConditionallyCompleteLattice/Defs.lean,Mathlib/Order/Cover.lean,Mathlib/Order/Extension/Well.lean,Mathlib/Order/Hom/Basic.lean,Mathlib/Order/InitialSeg.lean,Mathlib/Order/Minimal.lean,Mathlib/Order/OrderIsoNat.lean,Mathlib/Order/PiLex.lean,Mathlib/Order/RelClasses.lean,Mathlib/Order/RelIso/Basic.lean,Mathlib/Order/RelIso/Set.lean,Mathlib/Order/RelSeries.lean,Mathlib/Order/Shrink.lean,Mathlib/Order/SuccPred/Archimedean.lean,Mathlib/Order/WellFounded.lean,Mathlib/Order/WellFoundedSet.lean,Mathlib/Order/WellQuasiOrder.lean,Mathlib/Order/WithBot.lean,Mathlib/RingTheory/Artinian/Module.lean,Mathlib/RingTheory/Bezout.lean,Mathlib/RingTheory/DedekindDomain/Ideal/Basic.lean,Mathlib/RingTheory/FiniteLength.lean,Mathlib/RingTheory/Length.lean,Mathlib/RingTheory/MvPolynomial/Groebner.lean,Mathlib/RingTheory/MvPowerSeries/NoZeroDivisors.lean,Mathlib/RingTheory/Noetherian/Basic.lean,Mathlib/RingTheory/Noetherian/Defs.lean,Mathlib/RingTheory/Polynomial/UniqueFactorization.lean,Mathlib/RingTheory/PrincipalIdealDomain.lean,Mathlib/RingTheory/SimpleModule/Basic.lean,Mathlib/RingTheory/UniqueFactorizationDomain/Basic.lean,Mathlib/RingTheory/UniqueFactorizationDomain/Defs.lean,Mathlib/RingTheory/UniqueFactorizationDomain/Ideal.lean,Mathlib/RingTheory/UniqueFactorizationDomain/Nat.lean,Mathlib/RingTheory/Valuation/Archimedean.lean,Mathlib/SetTheory/Cardinal/Cofinality.lean,Mathlib/SetTheory/Cardinal/Order.lean,Mathlib/SetTheory/Ordinal/Basic.lean,Mathlib/SetTheory/Ordinal/Notation.lean,Mathlib/SetTheory/Ordinal/Rank.lean,Mathlib/SetTheory/ZFC/Basic.lean,Mathlib/SetTheory/ZFC/Class.lean,Mathlib/SetTheory/ZFC/PSet.lean,Mathlib/SetTheory/ZFC/Rank.lean,Mathlib/Topology/Category/Profinite/Nobeling/Basic.lean,Mathlib/Topology/NoetherianSpace.lean 81 43 ['JovanGerb', 'SnirBroshi', 'github-actions', 'mathlib-merge-conflicts', 'vihdzp'] pechersky and vihdzp
assignee:pechersky assignee:vihdzp
76-73796
2 months ago
56-238
55 days ago
14-62562
14 days
34830 parabamoghv
author:parabamoghv
 feat(CategoryTheory/Monoidal): add definition of categorical groups This PR defines of categorical groups, also known as coherent 2-groups, in mathlib. Motivation: Categorical groups are well-studied structures in monoidal category theory, but are not currently available in mathlib. The definitions in this PR follow the existing design patterns used for Category, MonoidalCategory, and BraidedCategory. This PR focuses on setting up the core structure and notation. Basic lemmas and further developments will be provided in a subsequent PR. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-category-theory new-contributor WIP merge-conflict 163/0 Mathlib.lean,Mathlib/CategoryTheory/Monoidal/CategoricalGroups/Basic.lean 2 27 ['dagurtomas', 'github-actions', 'mathlib-merge-conflicts', 'parabamoghv', 'robin-carlier'] robin-carlier
assignee:robin-carlier
76-68064
2 months ago
91-50104
91 days ago
5-13145
5 days
36313 SproutSeeds
author:SproutSeeds
 feat(Inversion): cobounded tendsto near center Part of #5939 Add `tendsto_inversion_nhdsNE_center_cobounded` in `Mathlib/Geometry/Euclidean/Inversion/Basic.lean`, proving `Tendsto (inversion c R) (𝓝[≠] c) (Bornology.cobounded P)` for `R ≠ 0`. Tools used: Codex 5.3 extra high --- Happy to adjust naming, placement, or proof style based on maintainer preference. t-euclidean-geometry new-contributor LLM-generated awaiting-author 42/0 Mathlib/Geometry/Euclidean/Inversion/Basic.lean 1 11 ['SproutSeeds', 'euprunin', 'github-actions', 'jsm28', 'kbuzzard', 'ocfnash'] jsm28
assignee:jsm28
76-42779
2 months ago
59-39718
59 days ago
6-36700
6 days
35521 grunweg
author:grunweg
 feat: the unusedSetOptionIn linter (rebased) Rebased version of #13653, adapted to current mathlib master. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) WIP t-linter large-import 201/0 Mathlib.lean,Mathlib/Tactic.lean,Mathlib/Tactic/Linter.lean,Mathlib/Tactic/Linter/DirectoryDependency.lean,Mathlib/Tactic/Linter/UnnecessarySetOptionIn.lean,MathlibTest/UnnecessarySetOptionIn.lean 6 2 ['github-actions'] nobody
76-31898
2 months ago
92-49464
92 days ago
0-23
23 seconds
35178 grunweg
author:grunweg
 chore: split `T%` elaborator into its own file and move to `Topology` TODO: this currently breaks the tangentspace case, need to rewrite it to avoid match_expr! --- - [x] depends on: #35176 - [x] depends on: #30463 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) WIP t-meta 173/0 Mathlib.lean,Mathlib/Geometry/Manifold/Notation.lean,Mathlib/Geometry/Manifold/VectorBundle/Basic.lean,Mathlib/Geometry/Manifold/VectorField/LieBracket.lean,Mathlib/Geometry/Manifold/VectorField/Pullback.lean,Mathlib/Topology/FiberBundle/Notation.lean,MathlibTest/DifferentialGeometry/Notation/Basic.lean 2 3 ['github-actions', 'mathlib-dependent-issues', 'mathlib-merge-conflicts'] nobody
76-31820
2 months ago
99-38945
99 days ago
0-1
1 second
34262 grunweg
author:grunweg
 feat: add mfderiv_const_smul This generalises an existing mathlib lemma (as the differentiability hypothesis is in fact not necessary). Co-authored-by: Patrick Massot [patrickmassot@free.fr](mailto:patrickmassot@free.fr) --- Note: this PR is now lower-priority (after some reorgs it is no longer on the path to the Levi-Civita connection); it should be rewritten following the approach in #34263. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) awaiting-author t-differential-geometry WIP 16/0 Mathlib/Geometry/Manifold/MFDeriv/SpecificFunctions.lean 1 9 ['github-actions', 'grunweg', 'mathlib-merge-conflicts', 'ocfnash'] ocfnash
assignee:ocfnash
76-19451
2 months ago
120-16126
120 days ago
0-1122
18 minutes
36323 SproutSeeds
author:SproutSeeds
 feat(Inversion): discontinuity and center/global fderiv formulas Part of #5939 Adds the discontinuity-at-center lemma for inversion and derives the center/global `fderiv` formulas from it. This draft currently builds on the preceding cobounded-tendsto lemma from #36313 while that earlier slice is under review. Scope is limited to `Mathlib/Geometry/Euclidean/Inversion/Calculus.lean`. Tools used: Codex 5.3 extra high --- Happy to adjust naming, placement, or proof style based on maintainer preference. t-euclidean-geometry new-contributor LLM-generated 65/0 Mathlib/Geometry/Euclidean/Inversion/Basic.lean,Mathlib/Geometry/Euclidean/Inversion/Calculus.lean 2 2 ['github-actions'] nobody
76-18990
2 months ago
unknown
0-0
0 seconds
36326 Arnav-panjla
author:Arnav-panjla
 Feat/gaussian schwartz map feat(Analysis/SpecialFunctions/Gaussian): define the Gaussian as a Schwartz function in 1D Define the Gaussian function `x ↦ exp (-x^2)` as a `SchwartzMap` in the one-dimensional case. The proof establishes the Schwartz decay conditions by showing that polynomially weighted expressions of the form `(1 + x^2)^m * exp (-x^2)` are bounded. This allows the Gaussian to be packaged using the `SchwartzMap` API. During the implementation a few adjustments were required to match the current Mathlib API. In particular: * replace the non-existent `IsBigO.mul_right` with `IsBigO.of_bound` applied to the full product `(1 + x^2)^m * exp (-x^2)` * fix `mem_cocompact` usage by replacing `(hh_tendsto.eventually ...).mem_cocompact` with `mem_cocompact.mp (hh_tendsto ...)` * adjust the `hb_bound` step using `gcongr` with exact bounds so that both goals close * remove the unused declaration `hf_nonpos` * register the required import in `Mathlib.lean` This implements the one-dimensional case mentioned in the issue. The generalization to Gaussians associated with arbitrary positive-definite bilinear forms can be added in a follow-up PR. Closes #33072 t-analysis new-contributor 235/0 Mathlib.lean,Mathlib/Analysis/SpecialFunctions/Gaussian/SchwartzMap.lean 2 4 ['CoolRmal', 'github-actions'] nobody
76-12317
2 months ago
76-15728
76 days ago
76-15439
76 days
36333 thorimur
author:thorimur
 test: checkTypeEvenMore --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-linter large-import 35/0 Mathlib/Tactic/Linter/Lint.lean 1 1 ['github-actions'] nobody
76-7430
2 months ago
unknown
0-0
0 seconds
30579 smmercuri
author:smmercuri
 feat : `v.adicCompletionIntegers K` is compact when `K` is a number field --- - [x] depends on: #30576 - [x] depends on: #33484 - [x] depends on: #33594 - [ ] depends on: #34045 - [x] depends on: #36067 - [x] depends on: #36137 - [x] depends on: #36184 - [x] depends on: #36492 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) blocked-by-other-PR large-import 362/11 Mathlib.lean,Mathlib/NumberTheory/NumberField/Completion/FinitePlace.lean,Mathlib/NumberTheory/NumberField/LiesOverInstances.lean,Mathlib/NumberTheory/RamificationInertia/Valuation.lean,Mathlib/RingTheory/DedekindDomain/AdicValuation.lean,Mathlib/RingTheory/Valuation/Discrete/RankOne.lean,Mathlib/RingTheory/Valuation/Extension.lean,Mathlib/Topology/Algebra/Valued/WithVal.lean 9 10 ['github-actions', 'mathlib-merge-conflicts', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
75-82508
2 months ago
219-34016
219 days ago
0-13
13 seconds
35215 kim-em
author:kim-em
 chore: use @[to_dual] in FixedPoints This PR adds `@[to_dual]` annotations to 14 theorems about `lfp` in `Order/FixedPoints.lean`, auto-generating their `gfp` duals and deleting the hand-written versions. Also registers `OrderHom.lfp` as the dual of `OrderHom.gfp` via `attribute [to_dual existing]`. Auto-generated duals include: `le_gfp`, `gfp_le_fixed`, `gfp_le`, `gfp_le_map`, `map_gfp`, `isFixedPt_gfp`, `map_le_gfp`, `isGreatest_gfp_le`, `isGreatest_gfp`, `gfp_induction`, `map_gfp_comp`, `gfp_gfp`, `map_inf_fixedPoints_le`, `map_sInf_subset_fixedPoints_le`. [Diff relative to #35208](https://github.com/kim-em/mathlib4/compare/kim/to-dual-bounds-basic...kim/to-dual-fixed-points) - [x] depends on: #35208 🤖 Prepared with Claude Code LLM-generated merge-conflict 249/548 Mathlib/Algebra/Module/Torsion/Basic.lean,Mathlib/Order/CompleteLattice/Basic.lean,Mathlib/Order/CompleteLattice/Defs.lean,Mathlib/Order/ConditionallyCompleteLattice/Defs.lean,Mathlib/Order/FixedPoints.lean,Mathlib/Order/GaloisConnection/Basic.lean,Mathlib/Order/Interval/Set/Disjoint.lean,Mathlib/Topology/Order.lean 8 11 ['JovanGerb', 'github-actions', 'kim-em', 'mathlib-dependent-issues', 'mathlib-merge-conflicts', 'vihdzp'] alexjbest
assignee:alexjbest
75-75785
2 months ago
63-18786
63 days ago
24-14816
24 days
35951 parabamoghv
author:parabamoghv
 feat(CategoryTheory/Monoidal): evaluation coevaluation isomorphisms This PR adds four features to rigid categories: 1. `coevaluation_evaluation` and `evaluation_coevaluation` as isomorphism equalities: Using `IsIso` instances for the `evaluation` and `coevaluation` morphisms, we promote the morphism equalities to isomorphism equalities. 2. `ExactPairing Y X` from `ExactPairing X Y`: Using an exact pairing and `IsIso` instances for both `evaluation` and `coevaluation`, we swap the exact pairing by inverting the evaluation and coevaluation morphisms. Any suggestions for the definition name are welcome. Right now it is `ExactPairing.Symm`. The second choice was `ExactPairing.Swap`. 3. `HasLeftDual X` from `HasRightDual X`: Using a `HasRightDual X` instance and relevant `IsIso` instances, we construct a left dual. Similar construction for the other way. 4. `LeftDual` isomorphic to `RightDual`: Using relevant `IsIso` instances, we provide the isomorphism from the left dual of an object to the right dual. This can be achieved in two ways: either by using `leftDualIso` or using `rightDualIso`. We will prove in a subsequent PR that both these isomorphisms are equal. Motivation: This is part of an effort to formalize CategoricalGroups, which can be defined as right rigid groupoids. The approach is motivated by the discussion in [#34830](https://github.com/leanprover-community/mathlib4/pull/34830). Any comments or suggestions are welcome, especially about the naming. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-category-theory new-contributor awaiting-author 45/0 Mathlib/CategoryTheory/Monoidal/Rigid/Basic.lean 1 18 ['dagurtomas', 'github-actions', 'joelriou', 'parabamoghv', 'robin-carlier'] robin-carlier
assignee:robin-carlier
75-47496
2 months ago
64-15031
64 days ago
7-83579
7 days
36203 mattrobball
author:mattrobball
 chore(Order.WithBotTop): make `coe` an `abbrev` Currently `WithBotTop.coe` is a `def` when the whole type is an `abbrev`. This blocks reduction unnecessarily so we make `coe` an `abbrev`. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-order 1/1 Mathlib/Order/WithBotTop.lean 1 2 ['JovanGerb', 'github-actions'] nobody
75-34051
2 months ago
78-26959
78 days ago
78-26670
78 days
36165 Parcly-Taxel
author:Parcly-Taxel
 chore: deprecate `Nat.strongRec(On)'` In favour of Batteries's `Nat.strongRec` for definitions and `Nat.strong_induction_on` for proofs. t-data merge-conflict 34/66 Mathlib/Analysis/Analytic/Inverse.lean,Mathlib/Data/Int/GCD.lean,Mathlib/Data/Nat/Factorization/Induction.lean,Mathlib/Data/Nat/Init.lean,Mathlib/Data/Set/Finite/Basic.lean,Mathlib/Data/ZMod/Basic.lean,Mathlib/GroupTheory/SpecificGroups/Cyclic.lean,Mathlib/Topology/EMetricSpace/Paracompact.lean 8 6 ['JovanGerb', 'MichaelStollBayreuth', 'Parcly-Taxel', 'Vierkantor', 'github-actions', 'mathlib-bors', 'mathlib-merge-conflicts'] Vierkantor
assignee:Vierkantor
75-33716
2 months ago
63-18776
63 days ago
15-53464
15 days
35069 A-M-Berns
author:A-M-Berns
 feat(Geometry/Polygon): simple polygons and boundary map This PR introduces Simple polygons with the predicate `IsSimple`, which captures the idea of a non-self-intersecting boundary, in the file Simple.lean. In the file Boundary.lean, a boundary map from `AddCircle n` is defined. I prove that the range of this map is the boundary and that this map is injective if and only if the polygon is simple. I kept Boundary.lean and Simple.lean separate because future results will include stuff just about the boundary map independent of simplicity (e.g. that it is continuous in the appropriate setting) and stuff just about simple polygons independent of the boundary map (e.g. that for n = 3, IsSimple iff HasNondegenerateVertices.) I used Claude Code to help generate some of the proof material, but I golfed and edited all AI contribution. - [x] depends on: #34598 --- new-contributor t-euclidean-geometry LLM-generated 360/0 Mathlib.lean,Mathlib/Geometry/Polygon/Boundary.lean,Mathlib/Geometry/Polygon/Simple.lean,Mathlib/Logic/Equiv/Fin/Rotate.lean 4 30 ['A-M-Berns', 'eric-wieser', 'github-actions', 'joneugster', 'jsm28', 'mathlib-dependent-issues', 'mathlib-merge-conflicts', 'vihdzp', 'wwylele'] eric-wieser
assignee:eric-wieser
74-63897
2 months ago
86-15243
86 days ago
88-49240
88 days
36364 Bergschaf
author:Bergschaf
 feat(Order/Sublocale): Better API for NucleusIsoSublocale I propose defining the conversion from Nuclei to Sublocales (and vice versa) directly in the `NucleusIsoSublocale` OrderIso. `Nucleus.toSublocale` and `Sublocale.toNucleus` will then just be abbrev's for the underlying OrderIso. This makes it a lot nicer to transition between the two Structures, especially when (infinite) infima and suprema are involved. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-order awaiting-author 46/33 Mathlib/Order/Sublocale.lean 1 4 ['Bergschaf', 'Vierkantor', 'YaelDillies', 'github-actions'] bryangingechen and pechersky
assignee:bryangingechen assignee:pechersky
74-32576
2 months ago
52-82001
52 days ago
22-25229
22 days
33864 Timeroot
author:Timeroot
 feat(Computability/Primrec): Proving several Nat arithmetic functions are primrec Prove that gcd, lcm, coprimality, divisiblity, primality, factorial, descending factorial, powers, and various logarithms are all primitive recursive. Co-authored-by: Aristotle Harmonic <[aristotle-harmonic@harmonic.fun](mailto:aristotle-harmonic@harmonic.fun)> large-import t-computability merge-conflict 195/4 Mathlib.lean,Mathlib/Computability/Primrec.lean,Mathlib/Computability/Primrec/List.lean,Mathlib/Computability/Primrec/Nat.lean,Mathlib/Data/Nat/Log.lean 5 7 ['eric-wieser', 'github-actions', 'mathlib-merge-conflicts', 'mathlib4-merge-conflict-bot'] nobody
74-22263
2 months ago
52-30171
52 days ago
47-19946
47 days
33668 Citronhat
author:Citronhat
 feat(PMF): add lintegral formulas for PMF This PR introduces two lemmas describing the `lintegral` of a function with respect to the measure induced by a probability mass function: - `PMF.lintegral_eq_tsum` - `PMF.lintegral_eq_sum` These are the `ℝ≥0∞` analogues of the existing Bochner `integral` formulas `integral_eq_tsum` and `integral_eq_sum`. They could be useful for reasoning about expectations and integrability. In addition, the proof of `integral_eq_sum` is simplified by deriving it directly from `integral_eq_tsum` using `tsum_fintype`. t-measure-probability new-contributor awaiting-author merge-conflict 14/5 Mathlib/Probability/ProbabilityMassFunction/Integrals.lean 1 3 ['DavidLedvinka', 'github-actions', 'mathlib-merge-conflicts'] nobody
74-6119
2 months ago
80-40862
80 days ago
55-73479
55 days
34040 Ruben-VandeVelde
author:Ruben-VandeVelde
 feat: generalize HasCompl.compl image/preimage lemmas to Involutive --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-data awaiting-author merge-conflict 23/14 Mathlib/Data/Set/Image.lean 1 6 ['eric-wieser', 'github-actions', 'mathlib-merge-conflicts'] eric-wieser
assignee:eric-wieser
74-5553
2 months ago
112-18251
112 days ago
14-12127
14 days
34246 staroperator
author:staroperator
 feat(SetTheory/Cardinal): Δ-system lemma We prove the Δ-system lemma, which says for any regular cardinal `θ` and infinite cardinal `κ < θ`, if `∀ c < θ, c ^< κ < θ`, any `θ`-sized family of sets whose cardinalities are less than `κ` must contain a `θ`-sized Δ-system (this condition is called Δ-system property for `θ` and `κ`, noted as `Δ(θ, k)`). As a special case, `Δ(ℵ₁, ℵ₀)` ensures any uncountable family of finite sets must contain an uncountable Δ-system. --- - [ ] depends on: #37685 - [ ] depends on: #38266 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-set-theory blocked-by-other-PR large-import merge-conflict 384/0 Mathlib.lean,Mathlib/Order/Bounds/Basic.lean,Mathlib/Order/Club.lean,Mathlib/Order/CompleteLatticeIntervals.lean,Mathlib/Order/DirSupClosed.lean,Mathlib/Order/IsNormal.lean,Mathlib/Order/LatticeIntervals.lean,Mathlib/SetTheory/Cardinal/Arithmetic.lean,Mathlib/SetTheory/Cardinal/Basic.lean,Mathlib/SetTheory/Cardinal/Cofinality.lean,Mathlib/SetTheory/Cardinal/DeltaSystem.lean,Mathlib/SetTheory/Cardinal/Pigeonhole.lean,Mathlib/SetTheory/Ordinal/Arithmetic.lean,Mathlib/SetTheory/Ordinal/Basic.lean,docs/references.bib 6 11 ['github-actions', 'mathlib-dependent-issues', 'mathlib-merge-conflicts', 'staroperator', 'vihdzp'] nobody
74-5552
2 months ago
74-5552
74 days ago
15-9493
15 days
35349 RemyDegenne
author:RemyDegenne
 feat: data processing inequality for the Kullback-Leibler divergence --- - [x] depends on: #34841 - [x] depends on: #35089 - [x] depends on: #27953 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) WIP t-measure-probability merge-conflict blocked-by-other-PR large-import 686/1 Mathlib.lean,Mathlib/InformationTheory/KullbackLeibler/DataProcessing.lean,Mathlib/MeasureTheory/Function/ConditionalExpectation/CondJensen.lean,Mathlib/MeasureTheory/Measure/Decomposition/IntegralRNDeriv.lean 6 5 ['github-actions', 'mathlib-dependent-issues', 'mathlib-merge-conflicts'] nobody
74-1944
2 months ago
96-28089
96 days ago
0-1
1 second
22366 kim-em
author:kim-em
 feat: `check_equalities` tactic for diagnosing defeq problems The `check_equalities` tactic, which checks the typing of equalities in the goal, reporting discrepancies between the implicit type argument of the equality, and the inferred types of the left and right hand sides, at "instances and reducible" transparency. Reports from this tactic do not necessarily indicate a problem, although typically `simp` should reduce rather than increase the reported discrepancies. `check_equalities` may be useful in diagnosing uses of `erw`. t-meta please-adopt WIP 123/4 Mathlib.lean,Mathlib/Tactic.lean,Mathlib/Tactic/Basic.lean,Mathlib/Tactic/CategoryTheory/CheckCompositions.lean,Mathlib/Tactic/CheckEqualities.lean,Mathlib/Tactic/Common.lean,MathlibTest/check_equalities.lean 7 21 ['adomani', 'b-mehta', 'eric-wieser', 'fpvandoorn', 'github-actions', 'grunweg', 'kim-em', 'mathlib-bors', 'mathlib4-merge-conflict-bot'] adamtopaz
assignee:adamtopaz
73-75798
2 months ago
60-37255
60 days ago
32-12136
32 days
25983 Multramate
author:Multramate
 feat(AlgebraicGeometry/EllipticCurve/Scheme): define the affine scheme associated to an elliptic curve This contribution was created as part of the AIM workshop "Formalizing Algebraic Geometry" in June 2024. Co-authored-by: Michael Stoll [Michael.Stoll@uni-bayreuth.de](mailto:Michael.Stoll@uni-bayreuth.de) Co-authored-by: Junyan Xu [junyanxu.math@gmail.com](mailto:junyanxu.math@gmail.com) --- - [ ] depends on: #36086 - [ ] depends on: #36146 t-algebraic-geometry blocked-by-other-PR 165/13 Mathlib.lean,Mathlib/Algebra/Category/CommAlgCat/Basic.lean,Mathlib/Algebra/Polynomial/Bivariate.lean,Mathlib/AlgebraicGeometry/EllipticCurve/Affine/Scheme.lean,Mathlib/AlgebraicGeometry/GammaSpecAdjunction.lean,Mathlib/AlgebraicGeometry/Scheme.lean,Mathlib/FieldTheory/Galois/Basic.lean,Mathlib/FieldTheory/Galois/Infinite.lean,Mathlib/GroupTheory/GroupExtension/Basic.lean,Mathlib/GroupTheory/QuotientGroup/Defs.lean,Mathlib/GroupTheory/SpecificGroups/Cyclic.lean,Mathlib/RingTheory/AdjoinRoot.lean,Mathlib/RingTheory/Ideal/Quotient/Operations.lean,Mathlib/RingTheory/Invariant/Basic.lean,Mathlib/RingTheory/Valuation/ValuationSubring.lean 15 10 ['MichaelStollBayreuth', 'Multramate', 'github-actions', 'mathlib-dependent-issues'] nobody
73-75797
2 months ago
52-22500
52 days ago
25-3959
25 days
36387 FrankieeW
author:FrankieeW
 feat(NumberTheory/QuadraticField): parameter uniqueness for quadratic fields ## Summary Prove that every quadratic field `ℚ(√d)` can be normalized to have a squarefree integer parameter, and that this parameter is unique. ## Main Results - `Qsqrtd.rescale`: rescaling isomorphism `ℚ(√d) ≃ₐ[ℚ] ℚ(√(a²d))` for `a ≠ 0` - `Qsqrtd_iso_int_param`: every `ℚ(√d)` is isomorphic to one with an integer parameter - `Qsqrtd_iso_squarefree_int_param`: every `ℚ(√d)` is isomorphic to one with a squarefree integer parameter - `Qsqrtd.param_unique`: if `ℚ(√d₁) ≃ₐ[ℚ] ℚ(√d₂)` with both `d₁, d₂` squarefree and `≠ 1`, then `d₁ = d₂` ## Helper Lemmas - `squarefree_eq_of_rat_sq_mul`: if `d₁ = d₂ · r²` with both squarefree, then `d₁ = d₂` - `int_dvd_of_ratio_square`: if `d₁/d₂` is a rational square and `d₂` is squarefree, then `d₂ ∣ d₁` - `not_isSquare_neg_one_rat`: `-1` is not a square in `ℚ` --- - [ ] depends on: #36347 WIP t-number-theory blocked-by-other-PR new-contributor large-import LLM-generated 400/0 Mathlib.lean,Mathlib/Algebra/QuadraticAlgebra/Defs.lean,Mathlib/Algebra/Squarefree/Basic.lean,Mathlib/NumberTheory/QuadraticField/Basic.lean 4 4 ['FrankieeW', 'github-actions', 'mathlib-dependent-issues'] nobody
73-69126
2 months ago
74-63396
74 days ago
0-2
2 seconds
34464 Komyyy
author:Komyyy
 refactor(Topology/Order/LowerUpperTopology): use `to_dual` --- Many files should be also dualized for this file... - [x] depends on: #33964 - [x] depends on: #34465 - [x] depends on: #34640 - [x] depends on: #36969 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-topology t-order merge-conflict 42/50 Mathlib/Topology/Order/LowerUpperTopology.lean 1 4 ['github-actions', 'mathlib-dependent-issues', 'mathlib-merge-conflicts', 'mathlib4-merge-conflict-bot'] nobody
73-49122
2 months ago
unknown
0-0
0 seconds
35249 themathqueen
author:themathqueen
 feat(Analysis/Matrix): linear functional on matrices is positive iff its weight is positive semi-definite No comments yet, I'm still thinking of the best thing to do here. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) WIP t-analysis merge-conflict 167/60 Mathlib.lean,Mathlib/Analysis/Matrix/GNS.lean,Mathlib/Analysis/Matrix/Order.lean 3 6 ['github-actions', 'mathlib-merge-conflicts'] nobody
73-49118
2 months ago
unknown
0-0
0 seconds
36128 grunweg
author:grunweg
 Levicivita minimal --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) WIP t-differential-geometry merge-conflict 4220/30 Mathlib.lean,Mathlib/Geometry/Manifold/MFDeriv/Atlas.lean,Mathlib/Geometry/Manifold/MFDeriv/NormedSpace.lean,Mathlib/Geometry/Manifold/VectorBundle/CovariantDerivative/Basic.lean,Mathlib/Geometry/Manifold/VectorBundle/CovariantDerivative/LeviCivita.lean,Mathlib/Geometry/Manifold/VectorBundle/CovariantDerivative/Prelim.lean,Mathlib/Geometry/Manifold/VectorBundle/CovariantDerivative/Torsion.lean,Mathlib/Geometry/Manifold/VectorBundle/CovariantDerivative/plan.mde,Mathlib/Geometry/Manifold/VectorBundle/LocalFrame.lean,Mathlib/Geometry/Manifold/VectorBundle/Misc.lean,Mathlib/Geometry/Manifold/VectorBundle/Tensoriality.lean,Mathlib/Geometry/Manifold/VectorField/LieBracket.lean,Mathlib/Geometry/Manifold/VectorField/Pullback.lean 13 3 ['github-actions', 'mathlib-merge-conflicts'] nobody
73-49101
2 months ago
79-34492
79 days ago
0-3
3 seconds
36219 gasparattila
author:gasparattila
 chore(Order/SupClosed): use `to_dual` --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-order 86/217 Mathlib/Order/ConditionallyCompleteLattice/Finset.lean,Mathlib/Order/SupClosed.lean 6 6 ['github-actions', 'mathlib-merge-conflicts'] bryangingechen
assignee:bryangingechen
73-37201
2 months ago
37-17522
37 days ago
41-21444
41 days
36442 SnirBroshi
author:SnirBroshi
 feat(Data/Sym/Sym2/Card): cardinality theorems about `Sym2 α` --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-data awaiting-author 95/0 Mathlib.lean,Mathlib/Data/Set/Image.lean,Mathlib/Data/Sym/Sym2/Card.lean 2 20 ['SnirBroshi', 'eric-wieser', 'github-actions', 'joneugster', 'themathqueen'] joneugster
assignee:joneugster
73-24919
2 months ago
21-43831
21 days ago
38-13299
38 days
35744 mkaratarakis
author:mkaratarakis
 feat(NumberTheory): non-vanishing derivative and algebraic lower bound for Gelfond-Schneider This PR continues the formalization of the **Gelfond-Schneider Theorem** (Hilbert's Seventh Problem). It establishes the critical algebraic lower bound for the auxiliary function's evaluation by isolating its first non-vanishing derivative and scaling it to a non-zero algebraic integer. Following the contradiction argument in Loo-Keng Hua's *Introduction to Number Theory* (Chapter 17.9, Equation 5), we extract the minimal non-vanishing derivative order $r$ and prove the integrality of its scaled evaluation to establish a strict analytical lower bound. 1) Confirms that by our previous choice of coefficients $\eta$, the first $n$ derivatives of the auxiliary function $R(x)$ vanish at the evaluation points $1, \dots, m$. 2) Extracts the exact minimal order of vanishing $r$ among all points $l_0 + 1$, explicitly proving the textbook assertion that $n \le r$. 3) Defines the non-zero algebraic number $\rho = (\log \alpha)^{-r} R^{(r)}(l_0)$. 4) Formalizes the crucial algebraic step that scaling the evaluated system coefficients by $c_1^{r+2mq}$ (formalized here as `cρ`) clears all denominators, resulting in an algebraic integer strictly within $\mathcal{O}_K$. 5) Concludes that because the scaled $\rho$ is a non-zero algebraic integer, its absolute norm is strictly bounded below by $1$. This establishes the algebraic foundation for the absolute lower bound $|N(\rho)| > c_5^{-r}$, which will directly oppose the complex analytic upper bound via Cauchy's integral formula in the final contradiction step. --- - [ ] depends on: #35316 - [ ] depends on: #35743 - [ ] depends on: #35315 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-number-theory blocked-by-other-PR 2028/0 Mathlib.lean,Mathlib/NumberTheory/Transcendental/GelfondSchneider/MainAlg.lean,Mathlib/NumberTheory/Transcendental/GelfondSchneider/MainAlgSetup.lean,Mathlib/NumberTheory/Transcendental/GelfondSchneider/MainAnalytic.lean,Mathlib/NumberTheory/Transcendental/GelfondSchneider/MainOrder.lean,Mathlib/NumberTheory/Transcendental/GelfondSchneider/MainPostAnalytic.lean 6 2 ['github-actions', 'mathlib-dependent-issues'] nobody
73-24222
2 months ago
86-69987
86 days ago
0-665
11 minutes
36406 SnirBroshi
author:SnirBroshi
 feat(Combinatorics/SimpleGraph/Matching): `#verts = 2 * #edgeSet` --- - [ ] depends on: #36442 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-combinatorics blocked-by-other-PR 122/0 Mathlib.lean,Mathlib/Combinatorics/SimpleGraph/DegreeSum.lean,Mathlib/Combinatorics/SimpleGraph/Matching.lean,Mathlib/Data/Sym/Sym2/Card.lean 4 3 ['github-actions', 'mathlib-dependent-issues', 'mathlib-merge-conflicts'] nobody
73-20547
2 months ago
73-20549
73 days ago
0-79432
22 hours
36015 mcdoll
author:mcdoll
 chore(Analysis/SchwartzMap): unify style for `mkCLM` uses Avoid using `refine` for definitions in favour of `where finally` and unify the indentation. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-analysis awaiting-author 86/85 Mathlib/Analysis/Distribution/SchwartzSpace/Basic.lean,Mathlib/Analysis/Distribution/SchwartzSpace/Deriv.lean,Mathlib/Analysis/Distribution/SchwartzSpace/Fourier.lean 2 9 ['github-actions', 'j-loreaux', 'mcdoll'] j-loreaux
assignee:j-loreaux
73-16424
2 months ago
66-5769
66 days ago
9-43106
9 days
25978 Bergschaf
author:Bergschaf
 feat(Order/Sublocale): Open Sublocales --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) - [x] depends on: #25089 - [ ] depends on: #36364 t-order blocked-by-other-PR 152/33 Mathlib/Order/Sublocale.lean 1 12 ['Bergschaf', 'Ruben-VandeVelde', 'YaelDillies', 'github-actions', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
73-15522
2 months ago
76-40542
76 days ago
0-74795
20 hours
34164 Scarlett-le
author:Scarlett-le
 feat(Geometry/Euclidean/Sphere): define arcs on spheres This PR defines arcs on spheres and proves basic properties. ## Main definitions * `EuclideanGeometry.Sphere.Arc`: An arc on a sphere, defined by a left endpoint and a midpoint on the sphere. The right endpoint is computed as the reflection of left across the line through the center and mid. * `Arc.opposite`: The opposite arc (same endpoints, antipodal mid). * `Arc.oppositeEquiv`: The involution given by `opposite`. * `Arc.minor` / `Arc.major`: The minor/major arc between two non-diametrically-opposite points. * `Arc.through`: The arc from `A` to `C` passing through `B`. * `Arc.avoiding`: The arc from `A` to `C` not passing through `B`. ## Main results * `through_right` / `avoiding_right`: The right endpoint equals `C`. * `mem_interior_through` / `mem_through`: `B` lies in the `through` arc. * `not_mem_avoiding`: `B` does not lie in the `avoiding` arc (when `A ≠ C`). ## Dependencies * #36241 * #35956 * #35957 awaiting-author t-euclidean-geometry merge-conflict 767/0 Mathlib.lean,Mathlib/Analysis/InnerProductSpace/Basic.lean,Mathlib/Analysis/InnerProductSpace/Projection/FiniteDimensional.lean,Mathlib/Geometry/Euclidean/Sphere/Arc.lean,Mathlib/Geometry/Euclidean/Sphere/Basic.lean,Mathlib/Geometry/Euclidean/Sphere/OrthRadius.lean 6 11 ['Scarlett-le', 'github-actions', 'jsm28', 'mathlib-merge-conflicts'] nobody
73-4071
2 months ago
122-5381
122 days ago
0-46829
13 hours
35058 GrigorenkoPV
author:GrigorenkoPV
 chore: move tendsto_{floor,ceil}_at{Top,Bot} Moves: - Topology.Algebra.Order.Floor.tendsto_floor_atTop -> Order.Filter.AtTopBot.Floor.tendsto_floor_atTop - Topology.Algebra.Order.Floor.tendsto_floor_atBot -> Order.Filter.AtTopBot.Floor.tendsto_floor_atBot - Topology.Algebra.Order.Floor.tendsto_ceil_atTop -> Order.Filter.AtTopBot.Floor.tendsto_ceil_atTop - Topology.Algebra.Order.Floor.tendsto_ceil_atBot -> Order.Filter.AtTopBot.Floor.tendsto_ceil_atBot --- Tracked in #7987 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor large-import awaiting-author 22/25 Mathlib/Order/Filter/AtTopBot/Floor.lean,Mathlib/Topology/Algebra/Order/Floor.lean 2 3 ['GrigorenkoPV', 'github-actions', 'j-loreaux'] nobody
72-84347
2 months ago
72-84347
72 days ago
27-45743
27 days
31670 edwin1729
author:edwin1729
 feat(Topology/Order): Scott Topology is Sober over Algebraic DCPO --- [Zulip discussion](https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/.3E.20Algebraic.20complete.20partial.20order.20and.20domain.20theory/with/536359313) here (2/2) PR to prove result in Stone Duality. Here we prove that Scott Topologies over Algebraic DCPOs are sober. - [ ] depends on: #31662 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-topology blocked-by-other-PR new-contributor merge-conflict 510/1 Mathlib.lean,Mathlib/Topology/Order/ScottTopology.lean,Mathlib/Topology/Order/ScottTopologyDCPO.lean,docs/references.bib 4 5 ['github-actions', 'mathlib-merge-conflicts', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
72-82229
2 months ago
unknown
0-0
0 seconds
32210 ADedecker
author:ADedecker
 feat: iteratedFDeriv as a linear map on test functions Add `TestFunction.iteratedFDeriv[WithOrder]LM`, analogous to [ContDiffMapSupportedIn.iteratedFDerivWithOrderLM](https://leanprover-community.github.io/mathlib4_docs/Mathlib/Analysis/Distribution/ContDiffMapSupportedIn.html#ContDiffMapSupportedIn.iteratedFDerivWithOrderLM) and [ContDiffMapSupportedIn.iteratedFDerivLM](https://leanprover-community.github.io/mathlib4_docs/Mathlib/Analysis/Distribution/ContDiffMapSupportedIn.html#ContDiffMapSupportedIn.iteratedFDerivLM) --- Co-authored-by: @luigi-massacci [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-analysis awaiting-author merge-conflict 157/88 Mathlib/Analysis/Distribution/ContDiffMapSupportedIn.lean,Mathlib/Analysis/Distribution/TestFunction.lean 2 7 ['github-actions', 'j-loreaux', 'mathlib-merge-conflicts', 'mathlib4-merge-conflict-bot'] grunweg, j-loreaux, sgouezel, urkud
assignee:urkud assignee:j-loreaux assignee:grunweg assignee:sgouezel
72-79325
2 months ago
157-4758
157 days ago
9-42804
9 days
33329 mcdoll
author:mcdoll
 feat(Analysis): Fourier-based Sobolev spaces We define Sobolev spaces (or Bessel potential spaces). --- - [x] depends on: #33242 - [x] depends on: #32769 - [x] depends on: #33404 - [x] depends on: #33597 - [x] depends on: #33636 - [x] depends on: #33741 - [x] depends on: #33751 - [x] depends on: #33752 - [x] depends on: #33776 - [x] depends on: #33859 - [x] depends on: #34027 - [x] depends on: #34099 - [x] depends on: #34100 - [x] depends on: #34294 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) WIP t-analysis merge-conflict 506/0 Mathlib/Analysis/Distribution/Sobolev.lean,Mathlib/Analysis/Distribution/TemperedDistribution.lean 2 8 ['CoolRmal', 'github-actions', 'mathlib-dependent-issues', 'mathlib-merge-conflicts', 'mathlib4-merge-conflict-bot'] nobody
72-78519
2 months ago
146-74499
146 days ago
0-1
1 second
35877 yoh-tanimoto
author:yoh-tanimoto
 feat(Algebra/Module): add twisted product module add a module structure on the product `E × F` with the `SMul` given by `s • ⟨x, y⟩ := ⟨s • x, σ s • y⟩` with `σ : R →+* S`. motivation: needed to define the graph of antilinear operator, see [discussion](https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/.60SemilinearPMap.60/with/576208198), which will be needed in the Tomita-Takesaki theory cf. #29251 t-algebra
label:t-algebra$
 279/0 Mathlib.lean,Mathlib/Algebra/Module/SemilinearModuleProd.lean 2 1 ['github-actions'] nobody
72-76387
2 months ago
unknown
0-0
0 seconds
30379 kckennylau
author:kckennylau
 feat(RingTheory): isomorphism of graded rings We define `GradedRingEquiv 𝒜 ℬ` to mean isomorphisms of graded rings, with notation `𝒜 ≃+*ᵍ ℬ`. When possible, instead of parametrizing results over `(e : 𝒜 ≃+*ᵍ ℬ)`, you should parametrize over `[GradedEquivLike E 𝒜 ℬ] [RingEquivClass E A B] (e : E)`. Zulip discussion: [How to define graded ring isomorphisms?](https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/How.20to.20define.20graded.20ring.20isomorphisms.3F/with/543962394) --- Split from #26061. - [x] depends on: #30355 - [x] depends on: #30312 - [x] depends on: #30367 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-ring-theory awaiting-author 447/1 Mathlib.lean,Mathlib/RingTheory/GradedAlgebra/RingEquiv.lean,Mathlib/RingTheory/GradedAlgebra/RingHom.lean 3 7 ['erdOne', 'github-actions', 'mathlib-dependent-issues', 'mathlib4-merge-conflict-bot'] erdOne
assignee:erdOne
72-75791
2 months ago
69-2543
69 days ago
9-26522
9 days
31135 kckennylau
author:kckennylau
 feat(RingTheory): is localization iff is localization on saturation In this PR we show that `A` is a localization of `R` on the submonoid `S` iff it is so on the saturation of `S`. Crucially, the saturation of `S` is precisely the elements that become a unit in `A`. --- - [x] depends on: #31132 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-ring-theory delegated 53/0 Mathlib.lean,Mathlib/RingTheory/Localization/Saturation.lean 2 15 ['alreadydone', 'chrisflav', 'github-actions', 'kckennylau', 'mathlib-bors', 'mathlib-dependent-issues', 'mathlib4-merge-conflict-bot', 'riccardobrasca'] chrisflav
assignee:chrisflav
72-75790
2 months ago
45-42925
45 days ago
32-67213
32 days
35812 khwilson
author:khwilson
 feat(MeasureTheory/Group/GeometryOfNumbers): successive minima and existence of a directional basis Define the successive minima of a discrete subgroup of a real vector space with respect to a convex set. These invariants show up throughout the geometry of numbers and are the focus of Minkowski's Second Theorem (whose statement is left here with a `proof_wanted`). Note: The key lemma is that the "gauge set" of the convex set is closed. I took the approach of showing that it is sequentially closed. There's an alternative approach via showing it's the union of a finite number of closed sets. I personally thought this approach was more intuitive, but the union approach may result in a slightly shorter proof. Co-authored-by: Yaël Dillies --- - [x] depends on #37738 - [x] depends on #37740 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor t-measure-probability awaiting-author 392/33 Mathlib/Algebra/Module/ZLattice/Basic.lean,Mathlib/Analysis/Convex/Basic.lean,Mathlib/Analysis/Convex/Body.lean,Mathlib/Analysis/Convex/Gauge.lean,Mathlib/LinearAlgebra/Basis/Fin.lean,Mathlib/LinearAlgebra/FiniteDimensional/Lemmas.lean,Mathlib/LinearAlgebra/LinearIndependent/Lemmas.lean,Mathlib/MeasureTheory/Group/GeometryOfNumbers.lean 6 32 ['Vierkantor', 'YaelDillies', 'github-actions', 'joneugster', 'khwilson', 'mathlib-merge-conflicts'] YaelDillies
assignee:YaelDillies
72-75784
2 months ago
45-66292
45 days ago
36-18181
36 days
36463 AlexeyMilovanov
author:AlexeyMilovanov
 feat(Data.Nat.Bits): add Nat.ofBits and prove bits_injective This PR introduces `Nat.ofBitsList` for `List Bool` and provides the missing proofs that the standard binary representation `Nat.bits` is injective (`Nat.bits_injective`) and possesses a right inverse for normalized lists (`Nat.bits_ofBitsList`). `ofBitsList` is implemented as an `abbrev` using `foldr` (keeping it transparent to tactics like `simp`). It serves as the exact left inverse to `bits`. Furthermore, `bits_ofBitsList` establishes that `bits` and `ofBitsList` form a bijection between `ℕ` and the set of lists with no trailing `false` values. This avoids the name collision with `Nat.ofBits` from `Batteries` and aligns with previous Zulip discussions (see [here](https://leanprover.zulipchat.com/#narrow/channel/144837-PR-reviews/topic/PR.20.2335857.3A.20Bijective.20Base-2.20Numeration)) regarding the utility of having a complete list-based API for `Nat.bits` in the library. CC: @linesthatinterlace - Adds `Nat.ofBitsList` (as an `abbrev`) - Adds `Nat.ofBitsList_bits` (left inverse property) - Adds `Nat.bits_injective` - Adds `Nat.ofBitsList_eq_zero_iff` (helper lemma for lists without trailing zeros) - Adds `Nat.bits_ofBitsList` (right inverse property) --- Zulip: [#PR reviews > PR #35857: Bijective Base-2 Numeration](https://leanprover.zulipchat.com/#narrow/channel/144837-PR-reviews/topic/PR.20.2335857.3A.20Bijective.20Base-2.20Numeration/with/576336540) Zulip: [#batteries > Upstreaming Nat.Bits](https://leanprover.zulipchat.com/#narrow/channel/348111-batteries/topic/Upstreaming.20Nat.2EBits/with/580736051) t-data new-contributor awaiting-author blocked-by-batt-PR 68/1 Mathlib/Data/Nat/Bits.lean 1 5 ['github-actions', 'joneugster', 'linesthatinterlace'] nobody
72-67465
2 months ago
63-19385
63 days ago
9-58085
9 days
35684 spitters
author:spitters
 feat(CategoryTheory/MarkovCategory): Kleisli PMF is a Markov category Add `Mathlib/CategoryTheory/MarkovCategory/KleisliPMF.lean` showing that `KleisliCat PMF` is a `MarkovCategory`. Uses `Prod` as tensor and `PUnit` as unit; reuses Mathlib's existing `KleisliCat`, `LawfulMonad PMF`, and `MarkovCategory` infrastructure. Builds the full instance stack: MonoidalCategory → BraidedCategory → SymmetricCategory → CopyDiscardCategory → MarkovCategory --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-category-theory new-contributor awaiting-author merge-conflict 323/1 Mathlib.lean,Mathlib/CategoryTheory/MarkovCategory/KleisliPMF.lean,Mathlib/Tactic/Linter/DirectoryDependency.lean 3 6 ['dagurtomas', 'github-actions', 'mathlib-merge-conflicts', 'spitters'] nobody
72-57345
2 months ago
85-3190
85 days ago
2-36419
2 days
35738 GrigorenkoPV
author:GrigorenkoPV
 perf: remove some `aesop`s and `grind`s --- Needs benchmarking. After that I can split it into several smaller portions, if needed. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor awaiting-author merge-conflict 236/92 Mathlib/Data/Finset/Card.lean,Mathlib/Data/Rel.lean,Mathlib/Data/Set/Lattice/Image.lean,Mathlib/Data/Set/Prod.lean,Mathlib/Logic/Equiv/Prod.lean,Mathlib/Order/Interval/Finset/Basic.lean,Mathlib/Order/KrullDimension.lean,Mathlib/Order/SupIndep.lean 8 7 ['github-actions', 'mathlib-merge-conflicts', 'themathqueen', 'vihdzp'] nobody
72-57344
2 months ago
86-39024
86 days ago
0-45583
12 hours
36089 pfaffelh
author:pfaffelh
 feat(Topology/Compactness/CompactSystem): set system of finite unions of sets in a compact system is again a compact system A compact system is a set system with the following property: If all finite intersections of a sequence in the set system is non-empty, the countable intersection is not empty. Starting with a compact system, consider the finite unions of sets in the copact system. Such sets again form a compact system (`IsCompactSystem.union.isCompactSystem`). This was previously #25900. --- - [ ] depends on: #36013 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) brownian t-topology merge-conflict 527/0 Mathlib/Data/Set/Dissipate.lean,Mathlib/Topology/Compactness/CompactSystem.lean 5 3 ['github-actions', 'mathlib-dependent-issues', 'mathlib-merge-conflicts'] nobody
72-57340
2 months ago
30-26295
30 days ago
0-58592
16 hours
36160 pfaffelh
author:pfaffelh
 feat (Topology/Compactness/CompactSystem): closed and compact square cylinders form a compact system feat (Topology/Compactness/CompactSystem): Closed and compact square cylinders form a compact system A square cylinder is a set of the form `s.pi t` in a product space. A closed compact square cylinder has `IsClosed (t i)` and `IsCompact (t i)` for all `i ∈ s`. This set system is a compact system (as introduced in PR #36013). Streamline the definition of square cylinders in MeasureTheory/Constructions/Cylinders on the way. Co-authors: Rémy Degenne remy.degenne@inria.fr --- - [ ] depends on: #36013 --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) brownian merge-conflict t-topology 388/1 Mathlib.lean,Mathlib/Data/Set/Accumulate.lean,Mathlib/Data/Set/Dissipate.lean,Mathlib/Data/Set/Prod.lean,Mathlib/MeasureTheory/Constructions/Cylinders.lean,Mathlib/MeasureTheory/PiSystem.lean,Mathlib/Topology/Compactness/CompactSystem.lean 7 4 ['github-actions', 'mathlib-dependent-issues', 'mathlib-merge-conflicts'] nobody
72-57339
2 months ago
72-57339
72 days ago
0-64125
17 hours
36225 pfaffelh
author:pfaffelh
 feat(Topology/Compactness/CompactSystem): set system of countable intersections of sets in a compact system is again a compact system A compact system is a set system with the following property: If all finite intersections of a sequence in the set system is non-empty, the countable intersection is not empty. Starting with a compact system, consider the countable intersections of sets in the copact system. Such sets again form a compact system. --- - [x] depends on: #36013 - [ ] depends on: #38245 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) brownian WIP file-removed merge-conflict blocked-by-other-PR 313/0 Mathlib.lean,Mathlib/Algebra/Group/Irreducible/Indecomposable.lean,Mathlib/Algebra/Order/Group/Indicator.lean,Mathlib/AlgebraicTopology/DoldKan/Compatibility.lean,Mathlib/AlgebraicTopology/DoldKan/Equivalence.lean,Mathlib/AlgebraicTopology/DoldKan/EquivalencePseudoabelian.lean,Mathlib/Analysis/Normed/Group/Indicator.lean,Mathlib/Combinatorics/SimpleGraph/Connectivity/Connected.lean,Mathlib/Combinatorics/SimpleGraph/Matching.lean,Mathlib/Combinatorics/SimpleGraph/Operations.lean,Mathlib/Combinatorics/SimpleGraph/Tutte.lean,Mathlib/FieldTheory/RatFunc/AsPolynomial.lean,Mathlib/FieldTheory/RatFunc/Degree.lean,Mathlib/LinearAlgebra/RootSystem/Base.lean,Mathlib/LinearAlgebra/RootSystem/Finite/G2.lean,Mathlib/LinearAlgebra/RootSystem/GeckConstruction/Lemmas.lean,Mathlib/MeasureTheory/Integral/Bochner/Set.lean,Mathlib/MeasureTheory/Integral/DominatedConvergence.lean,Mathlib/MeasureTheory/Integral/IntervalIntegral/Basic.lean,Mathlib/NumberTheory/FunctionField.lean,Mathlib/NumberTheory/RatFunc/Ostrowski.lean,Mathlib/Order/Interval/Set/LinearOrder.lean,Mathlib/Probability/Distributions/Gaussian/IsGaussianProcess/Independence.lean,Mathlib/Probability/Independence/BoundedContinuousFunction.lean,Mathlib/Probability/Independence/Process/Basic.lean,Mathlib/Probability/Independence/Process/HasIndepIncrements.lean,Mathlib/Topology/Compactness/Compact.lean,Mathlib/Topology/Compactness/CompactSystem.lean,Mathlib/Topology/Sets/CompactOpenCovered.lean,Mathlib/Topology/UniformSpace/UniformConvergenceTopology.lean,docs/1000.yaml 5 4 ['github-actions', 'mathlib-dependent-issues', 'mathlib-merge-conflicts'] nobody
72-57335
2 months ago
72-57335
72 days ago
1-16213
1 day
35588 eric-wieser
author:eric-wieser
 chore(Util/Qq): remove `meta` These are wrappers of existing functions on `Expr`s which are also not marked `meta`. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-meta awaiting-CI delegated 7/7 Mathlib/Data/Multiset/Sort.lean,Mathlib/Tactic/FieldSimp/Lemmas.lean,Mathlib/Tactic/NormNum/Core.lean,Mathlib/Tactic/Order/ToInt.lean,Mathlib/Tactic/Simproc/Divisors.lean,Mathlib/Tactic/Simproc/FinsetInterval.lean,Mathlib/Util/Qq.lean 7 3 ['Vierkantor', 'github-actions', 'mathlib-bors'] nobody
72-53484
2 months ago
90-51420
90 days ago
0-35325
9 hours
36334 Multramate
author:Multramate
 feat(AlgebraicGeometry/EllipticCurve): add notation and pretty printer for points Co-authored-by: Kenny Lau --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebraic-geometry t-meta WIP merge-conflict 41/0 Mathlib/AlgebraicGeometry/EllipticCurve/Affine/Point.lean,Mathlib/AlgebraicGeometry/EllipticCurve/Jacobian/Point.lean,Mathlib/AlgebraicGeometry/EllipticCurve/Projective/Point.lean 3 13 ['CBirkbeck', 'Multramate', 'adamtopaz', 'erdOne', 'github-actions', 'mathlib-merge-conflicts', 'riccardobrasca'] adamtopaz
assignee:adamtopaz
72-37017
2 months ago
30-6106
30 days ago
45-86235
45 days
34728 j-loreaux
author:j-loreaux
 feat: continuous linear equivalence between continuous `ℝ`- and `𝕜`-linear functionals (in either the strong or weak-⋆ topologies) This realizes the map `StrongDual.extendRCLikeₗ`, after pre- and post-composing so that it is an equivalence between the weak duals, as a *continuous* linear equivalence. In addition, when the space is a topological vector space, we realize `StrongDual.extendRCLikeₗ` as a *continuous* linear equivalence between the strong duals. --- - [x] depends on: #34543 The placement in `Analysis/Normed/Module/WeakDual` seems suboptimal because this has nothing to do with the norm. This is because `WeakDual.toStrongDual` is already in this file, which should probably be moved to `Topology/Algebra/Module/WeakDual`. However, even if that moves, the declarations added in this PR cannot easily go with it because they involve `RCLike`. Potentially, they could move to `Analysis/RCLike/Extend` if that file gained the `Topology/Algebra/Module/WeakDual` import. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-analysis awaiting-author 87/2 Mathlib/Analysis/Normed/Module/RCLike/Extend.lean,Mathlib/Analysis/Normed/Module/WeakDual.lean 2 19 ['ADedecker', 'github-actions', 'j-loreaux', 'mathlib-dependent-issues', 'mathlib-merge-conflicts', 'themathqueen'] urkud
assignee:urkud
72-27195
2 months ago
28-67938
28 days ago
43-79923
43 days
30451 kckennylau
author:kckennylau
 feat(HomogeneousIdeal): generalize to homogeneous submodule Continuation of #30437 with permission from @jjaassoonn, which is a continuation of #9820 . The definitions, constructions and theorems in `HomogeneousIdeal.lean` are generalized to homogeneous submodules. Let `R` be a graded ring and `M` be a graded `R`-module. Say an `R`-submodule `N` of `M` is homogeneous if for every `x` in `N`, each projection of `x` to `M_i` is in `N`. None of this file's results depends on the grading on `R`, but we include the grading on `R` for technical reasons. We define the "homogeneous core" of a not necessarily homogeneous submodule N to be the biggest homogeneous submodule contained within N, and the "homogeneous hull" to be the smallest homogeneous submodule that contains N. All definitions/constructions/theorems are then copied for ideals/homogeneous ideals. The motivation of this generalization is graded quotient module. (#18716) --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-ring-theory awaiting-author merge-conflict 581/185 Mathlib/Algebra/BigOperators/Finsupp/Basic.lean,Mathlib/Algebra/DirectSum/Basic.lean,Mathlib/Algebra/DirectSum/Decomposition.lean,Mathlib/Algebra/DirectSum/Finsupp.lean,Mathlib/Algebra/Module/GradedModule.lean,Mathlib/AlgebraicGeometry/ProjectiveSpectrum/Basic.lean,Mathlib/AlgebraicGeometry/ProjectiveSpectrum/Scheme.lean,Mathlib/RingTheory/GradedAlgebra/Homogeneous/Ideal.lean,Mathlib/RingTheory/GradedAlgebra/Homogeneous/Submodule.lean,Mathlib/RingTheory/GradedAlgebra/Radical.lean 10 23 ['github-actions', 'mariainesdff', 'mathlib-merge-conflicts', 'mathlib4-merge-conflict-bot'] mariainesdff
assignee:mariainesdff
72-25789
2 months ago
72-25789
72 days ago
22-61538
22 days
35042 JovanGerb
author:JovanGerb
 chore: remove `meta` form `import Mathlib.Tactic...` This PR cleans up some imports of the form `import Mathlib.Tactic...`, by either removing them entirely, or removing the `meta` keyword. It should never be necessary to `meta import` a file from `Mathlib.Tactic`, because the relevant definitions should already have been marked as `meta`. The motivation is to reduce the amount of files that are `meta` imported when writing e.g. `import Mathlib`, hence reducing the amount of stuff that needs to be loaded. There are more other `meta import`s that need to be removed, but this PR is a good start. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) large-import merge-conflict 61/142 Mathlib/Algebra/BigOperators/Group/Finset/Defs.lean,Mathlib/Algebra/FreeMonoid/Basic.lean,Mathlib/Algebra/Group/Action/Hom.lean,Mathlib/Algebra/Order/Group/Unbundled/Abs.lean,Mathlib/CategoryTheory/Functor/Basic.lean,Mathlib/Data/List/ChainOfFn.lean,Mathlib/Dynamics/OmegaLimit.lean,Mathlib/GroupTheory/GroupAction/Defs.lean,Mathlib/GroupTheory/GroupAction/DomAct/Basic.lean,Mathlib/Tactic/Algebraize.lean,Mathlib/Tactic/ApplyFun.lean,Mathlib/Tactic/ArithMult.lean,Mathlib/Tactic/Bound.lean,Mathlib/Tactic/CategoryTheory/Bicategory/Datatypes.lean,Mathlib/Tactic/CategoryTheory/Bicategory/Normalize.lean,Mathlib/Tactic/CategoryTheory/Bicategory/PureCoherence.lean,Mathlib/Tactic/CategoryTheory/CheckCompositions.lean,Mathlib/Tactic/CategoryTheory/Coherence/Basic.lean,Mathlib/Tactic/CategoryTheory/Coherence/Normalize.lean,Mathlib/Tactic/CategoryTheory/Coherence/PureCoherence.lean,Mathlib/Tactic/CategoryTheory/Elementwise.lean,Mathlib/Tactic/CategoryTheory/Monoidal/Datatypes.lean,Mathlib/Tactic/CategoryTheory/Monoidal/Normalize.lean,Mathlib/Tactic/CategoryTheory/Monoidal/PureCoherence.lean,Mathlib/Tactic/CategoryTheory/ToApp.lean,Mathlib/Tactic/Choose.lean,Mathlib/Tactic/DeclarationNames.lean,Mathlib/Tactic/DefEqTransformations.lean,Mathlib/Tactic/DeriveCountable.lean,Mathlib/Tactic/DeriveFintype.lean,Mathlib/Tactic/DeriveTraversable.lean,Mathlib/Tactic/ENatToNat.lean,Mathlib/Tactic/Explode.lean,Mathlib/Tactic/Explode/Pretty.lean,Mathlib/Tactic/FinCases.lean,Mathlib/Tactic/FunProp.lean,Mathlib/Tactic/FunProp/Attr.lean,Mathlib/Tactic/FunProp/Core.lean,Mathlib/Tactic/FunProp/FunctionData.lean,Mathlib/Tactic/FunProp/Theorems.lean,Mathlib/Tactic/FunProp/Types.lean,Mathlib/Tactic/GCongr/Core.lean,Mathlib/Tactic/GRewrite/Elab.lean,Mathlib/Tactic/Group.lean,Mathlib/Tactic/IrreducibleDef.lean,Mathlib/Tactic/Lift.lean,Mathlib/Tactic/Linarith.lean,Mathlib/Tactic/Linarith/Lemmas.lean,Mathlib/Tactic/Linarith/Oracle/FourierMotzkin.lean,Mathlib/Tactic/Linarith/Oracle/SimplexAlgorithm.lean,Mathlib/Tactic/Linarith/Oracle/SimplexAlgorithm/Gauss.lean,Mathlib/Tactic/Linarith/Oracle/SimplexAlgorithm/SimplexAlgorithm.lean,Mathlib/Tactic/Linarith/Preprocessing.lean,Mathlib/Tactic/Linarith/Verification.lean,Mathlib/Tactic/LinearCombination/Lemmas.lean,Mathlib/Tactic/Linter/DeprecatedSyntaxLinter.lean,Mathlib/Tactic/Linter/DocPrime.lean,Mathlib/Tactic/Linter/DocString.lean,Mathlib/Tactic/Linter/EmptyLine.lean,Mathlib/Tactic/Linter/FlexibleLinter.lean,Mathlib/Tactic/Linter/GlobalAttributeIn.lean,Mathlib/Tactic/Linter/HashCommandLinter.lean,Mathlib/Tactic/Linter/Multigoal.lean,Mathlib/Tactic/Linter/OldObtain.lean,Mathlib/Tactic/Linter/Style.lean,Mathlib/Tactic/Linter/TextBased.lean,Mathlib/Tactic/Linter/TextBased/UnicodeLinter.lean,Mathlib/Tactic/Linter/UnusedTactic.lean,Mathlib/Tactic/Linter/UnusedTacticExtension.lean,Mathlib/Tactic/MinImports.lean,Mathlib/Tactic/MoveAdd.lean,Mathlib/Tactic/Nontriviality/Core.lean,Mathlib/Tactic/NormNum/DivMod.lean,Mathlib/Tactic/NormNum/Ineq.lean,Mathlib/Tactic/NormNum/Prime.lean,Mathlib/Tactic/Order.lean,Mathlib/Tactic/Order/CollectFacts.lean,Mathlib/Tactic/Order/Graph/Tarjan.lean,Mathlib/Tactic/PNatToNat.lean,Mathlib/Tactic/Peel.lean,Mathlib/Tactic/ProdAssoc.lean,Mathlib/Tactic/ProxyType.lean,Mathlib/Tactic/Push.lean,Mathlib/Tactic/Qify.lean,Mathlib/Tactic/RSuffices.lean,Mathlib/Tactic/Ring/Basic.lean,Mathlib/Tactic/Ring/Common.lean,Mathlib/Tactic/Ring/Compare.lean,Mathlib/Tactic/Ring/PNat.lean,Mathlib/Tactic/Simproc/Divisors.lean,Mathlib/Tactic/Simproc/FinsetInterval.lean,Mathlib/Tactic/Simps/Basic.lean,Mathlib/Tactic/Subsingleton.lean,Mathlib/Tactic/TacticAnalysis/Declarations.lean,Mathlib/Tactic/TautoSet.lean,Mathlib/Tactic/Translate/Core.lean,Mathlib/Tactic/Translate/TagUnfoldBoundary.lean,Mathlib/Tactic/Widget/Calc.lean,Mathlib/Tactic/Widget/CommDiag.lean,Mathlib/Tactic/Widget/CongrM.lean 107 9 ['JovanGerb', 'dupuisf', 'github-actions', 'leanprover-radar', 'mathlib-merge-conflicts'] robin-carlier
assignee:robin-carlier
72-25066
2 months ago
67-48359
67 days ago
26-69911
26 days
36486 eric-wieser
author:eric-wieser
 refactor: change Encodable to uniquely specify `decode` --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-logic 73/47 Mathlib/Logic/Encodable/Basic.lean,Mathlib/Logic/Function/Basic.lean 2 0 [] nobody
72-24594
2 months ago
unknown
0-0
0 seconds
36487 samueloettl
author:samueloettl
 feat(Dynamics): Ergodicity characterization --- - [ ] depends on: #35402 - [x] depends on: #35451 This is a work in progress for a characterization of ergodicity via a Birkhoff Average. Coarse Feedback is very encouraged. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) WIP new-contributor large-import blocked-by-other-PR 421/1 Mathlib/Dynamics/Ergodic/Function.lean,Mathlib/Dynamics/Ergodic/OnAverageIndependent.lean,Mathlib/Topology/MetricSpace/Pseudo/Basic.lean 3 3 ['github-actions', 'mathlib-dependent-issues'] nobody
72-22182
2 months ago
72-22201
72 days ago
0-163
2 minutes
35881 astrainfinita
author:astrainfinita
 chore: do not use `inf` `sup` in `LinearOrder` lemmas `max` and `sup` have been unified into the same function. It is no longer necessary to create lemmas about `sup` for `LinearOrder`. This PR moves `max` lemmas to an earlier file to ensure that files importing deprecated `sup` lemmas can use them. --- - [ ] depends on: #35841 - [ ] depends on: #35880 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-order merge-conflict blocked-by-other-PR 136/126 Mathlib/Algebra/Order/CauSeq/Basic.lean,Mathlib/Algebra/Order/Group/PosPart.lean,Mathlib/Algebra/Order/Group/Unbundled/Abs.lean,Mathlib/Algebra/Polynomial/Reverse.lean,Mathlib/Analysis/Analytic/Basic.lean,Mathlib/Analysis/Analytic/ConvergenceRadius.lean,Mathlib/Analysis/CStarAlgebra/Basic.lean,Mathlib/Analysis/Complex/OpenMapping.lean,Mathlib/Analysis/Normed/Group/Seminorm.lean,Mathlib/Analysis/Normed/Module/Multilinear/Basic.lean,Mathlib/Analysis/Seminorm.lean,Mathlib/Analysis/SpecialFunctions/Log/PosLog.lean,Mathlib/Data/Finset/Lattice/Fold.lean,Mathlib/Data/List/Infix.lean,Mathlib/Data/Nat/Factorization/LCM.lean,Mathlib/MeasureTheory/Measure/PreVariation.lean,Mathlib/MeasureTheory/Measure/Stieltjes.lean,Mathlib/MeasureTheory/PiSystem.lean,Mathlib/NumberTheory/AbelSummation.lean,Mathlib/NumberTheory/LSeries/PrimesInAP.lean,Mathlib/NumberTheory/ModularForms/EisensteinSeries/Summable.lean,Mathlib/NumberTheory/Ostrowski.lean,Mathlib/Order/BoundedOrder/Lattice.lean,Mathlib/Order/ConditionallyCompleteLattice/Indexed.lean,Mathlib/Order/Defs/LinearOrder.lean,Mathlib/Order/Filter/ENNReal.lean,Mathlib/Order/Heyting/Basic.lean,Mathlib/Order/Interval/Set/LinearOrder.lean,Mathlib/Order/Lattice.lean,Mathlib/Order/MinMax.lean,Mathlib/Order/OmegaCompletePartialOrder.lean,Mathlib/Probability/Moments/Basic.lean,Mathlib/Probability/Moments/IntegrableExpMul.lean,Mathlib/RingTheory/MvPolynomial/MonomialOrder.lean,Mathlib/RingTheory/Polynomial/HilbertPoly.lean,Mathlib/RingTheory/PowerSeries/Restricted.lean,Mathlib/RingTheory/PowerSeries/WeierstrassPreparation.lean,Mathlib/RingTheory/Valuation/Basic.lean,Mathlib/Tactic/Order/ToInt.lean,Mathlib/Topology/MetricSpace/Algebra.lean,Mathlib/Topology/MetricSpace/BundledFun.lean,Mathlib/Topology/MetricSpace/Infsep.lean,Mathlib/Topology/Semicontinuity/Basic.lean 44 4 ['github-actions', 'mathlib-dependent-issues', 'mathlib-merge-conflicts'] nobody
72-21656
2 months ago
83-55130
83 days ago
0-532
8 minutes
35802 xroblot
author:xroblot
 feat(RamificationInertia): splitting in the decomposition field --- - [x] depends on: #35798 - [ ] depends on: #35405 - [x] depends on: #35371 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-number-theory large-import merge-conflict blocked-by-other-PR 279/4 Mathlib/NumberTheory/RamificationInertia/Basic.lean,Mathlib/NumberTheory/RamificationInertia/HilbertTheory.lean,Mathlib/RingTheory/FiniteType.lean,Mathlib/RingTheory/Finiteness/Basic.lean 4 5 ['github-actions', 'joneugster', 'mathlib-dependent-issues', 'mathlib-merge-conflicts'] nobody
72-21169
2 months ago
85-45094
85 days ago
0-537
8 minutes
35522 grunweg
author:grunweg
 feat: lint for unused `backward` options --- Based on the `unnecessarySetOptionIn` linter (#35521 and #13653). [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-linter tech debt large-import 211/4 Mathlib.lean,Mathlib/Tactic.lean,Mathlib/Tactic/Linter.lean,Mathlib/Tactic/Linter/DirectoryDependency.lean,Mathlib/Tactic/Linter/UnnecessarySetOptionIn.lean,MathlibTest/UnnecessarySetOptionIn.lean,lakefile.lean 7 3 ['github-actions', 'mathlib-bors', 'mathlib-merge-conflicts'] nobody
72-10090
2 months ago
92-49017
92 days ago
0-19
19 seconds
36495 AlexKontorovich
author:AlexKontorovich
 chore(Finset/NatDivisors): refactor `card_divisors_mul` and `sum_divisors_mul` to not rely on `ArithmeticFunction` `Nat.Coprime.card_divisors_mul` and `Nat.Coprime.sum_divisors_mul` are moved to not rely on `ArithmeticFunction`. See zulip discussion here: [#mathlib4 > Library design question, e.g.`Nat.Coprime.card_divisors_mul` @ 💬](https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/Library.20design.20question.2C.20e.2Eg.2E.60Nat.2ECoprime.2Ecard_divisors_mul.60/near/577769899) Co-authored-by: Ziyan Wei and Aayush Rajasekaran --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) large-import t-number-theory t-algebra merge-conflict
label:t-algebra$
 45/14 Mathlib/Algebra/GCDMonoid/Basic.lean,Mathlib/Data/Finset/NatDivisors.lean,Mathlib/NumberTheory/ArithmeticFunction/Misc.lean 3 6 ['AlexKontorovich', 'arajasek', 'github-actions', 'mathlib-merge-conflicts'] riccardobrasca
assignee:riccardobrasca
72-8583
2 months ago
14-4947
14 days ago
53-21240
53 days
36079 DavidLedvinka
author:DavidLedvinka
 refactor(Probability): Refactors Conditional Independence to allow spaces that are not Standard Borel merge-conflict 1827/1120 Mathlib.lean,Mathlib/MeasureTheory/Function/ConditionalExpectation/Basic.lean,Mathlib/MeasureTheory/Function/ConditionalLExpectation.lean,Mathlib/MeasureTheory/Measure/NullMeasurable.lean,Mathlib/Order/Filter/CountableInter.lean,Mathlib/Probability/Independence/Basic.lean,Mathlib/Probability/Independence/CondIndep.lean,Mathlib/Probability/Independence/Conditional.lean,Mathlib/Probability/Independence/Conditional/CondIndep.lean,Mathlib/Probability/Independence/Conditional/CondIndepFun.lean,Mathlib/Probability/Independence/ZeroOne.lean,Mathlib/Probability/Kernel/Condexp.lean 12 2 ['github-actions', 'mathlib-merge-conflicts'] nobody
72-122
2 months ago
unknown
0-0
0 seconds
35991 xroblot
author:xroblot
 feat(RamificationInertia): decomposition field and inertia field of compositum --- - [ ] depends on: #35808 - [x] depends on: #35493 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) blocked-by-other-PR merge-conflict large-import 645/36 Mathlib/Algebra/Group/Subgroup/Basic.lean,Mathlib/FieldTheory/Galois/Basic.lean,Mathlib/FieldTheory/IntermediateField/Algebraic.lean,Mathlib/NumberTheory/RamificationInertia/Basic.lean,Mathlib/NumberTheory/RamificationInertia/Galois.lean,Mathlib/NumberTheory/RamificationInertia/HilbertTheory.lean 9 6 ['github-actions', 'mathlib-dependent-issues', 'mathlib-merge-conflicts'] nobody
71-85919
2 months ago
81-18920
81 days ago
0-316
5 minutes
36236 kim-em
author:kim-em
 chore: add module keyword to Archive and Counterexamples files This PR converts 105 Archive and Counterexamples files to module format, adding `module`, `public import`, and `@[expose] public section`. Eight files are left unconverted for now: - Seven files containing `private` declarations that need further work (`Imo1962Q1`, `MiuLanguage/Basic`, `MiuLanguage/DecisionSuf`, `AscendingDescendingSequences`, `BallotProblem`, `AharoniKorman`, `TopologistsSineCurve`) - `Counterexamples/InvertibleModuleNotIdeal` which needs an import path update For `Archive/Examples/PropEncodable`, the `private` declarations were removed as part of this conversion. 🤖 Prepared with Claude Code IMO LLM-generated merge-conflict awaiting-author 693/308 Archive/Arithcc.lean,Archive/Examples/Eisenstein.lean,Archive/Examples/Kuratowski.lean,Archive/Examples/PropEncodable.lean,Archive/Hairer.lean,Archive/Imo/Imo1959Q1.lean,Archive/Imo/Imo1959Q2.lean,Archive/Imo/Imo1960Q1.lean,Archive/Imo/Imo1960Q2.lean,Archive/Imo/Imo1961Q3.lean,Archive/Imo/Imo1962Q4.lean,Archive/Imo/Imo1963Q5.lean,Archive/Imo/Imo1964Q1.lean,Archive/Imo/Imo1969Q1.lean,Archive/Imo/Imo1972Q5.lean,Archive/Imo/Imo1975Q1.lean,Archive/Imo/Imo1977Q6.lean,Archive/Imo/Imo1981Q3.lean,Archive/Imo/Imo1982Q1.lean,Archive/Imo/Imo1985Q2.lean,Archive/Imo/Imo1986Q5.lean,Archive/Imo/Imo1987Q1.lean,Archive/Imo/Imo1988Q6.lean,Archive/Imo/Imo1994Q1.lean,Archive/Imo/Imo1997Q3.lean,Archive/Imo/Imo1998Q2.lean,Archive/Imo/Imo2001Q2.lean,Archive/Imo/Imo2001Q3.lean,Archive/Imo/Imo2001Q4.lean,Archive/Imo/Imo2001Q5.lean,Archive/Imo/Imo2001Q6.lean,Archive/Imo/Imo2002Q3.lean,Archive/Imo/Imo2005Q3.lean,Archive/Imo/Imo2005Q4.lean,Archive/Imo/Imo2006Q3.lean,Archive/Imo/Imo2006Q5.lean,Archive/Imo/Imo2008Q2.lean,Archive/Imo/Imo2008Q3.lean,Archive/Imo/Imo2008Q4.lean,Archive/Imo/Imo2010Q5.lean,Archive/Imo/Imo2011Q3.lean,Archive/Imo/Imo2011Q5.lean,Archive/Imo/Imo2013Q1.lean,Archive/Imo/Imo2013Q5.lean,Archive/Imo/Imo2015Q6.lean,Archive/Imo/Imo2019Q1.lean,Archive/Imo/Imo2019Q2.lean,Archive/Imo/Imo2019Q4.lean,Archive/Imo/Imo2020Q2.lean,Archive/Imo/Imo2021Q1.lean,Archive/Imo/Imo2024Q2.lean,Archive/Imo/Imo2024Q3.lean,Archive/Imo/Imo2024Q6.lean,Archive/Imo/Imo2025Q3.lean,Archive/Kuratowski.lean,Archive/MinimalSheffer.lean,Archive/OxfordInvariants/Summer2021/Week3P1.lean,Archive/Sensitivity.lean,Archive/Wiedijk100Theorems/AbelRuffini.lean,Archive/Wiedijk100Theorems/AreaOfACircle.lean,Archive/Wiedijk100Theorems/BirthdayProblem.lean,Archive/Wiedijk100Theorems/BuffonsNeedle.lean,Archive/Wiedijk100Theorems/CubingACube.lean,Archive/Wiedijk100Theorems/FriendshipGraphs.lean,Archive/Wiedijk100Theorems/HeronsFormula.lean,Archive/Wiedijk100Theorems/InverseTriangleSum.lean,Archive/Wiedijk100Theorems/Konigsberg.lean,Archive/Wiedijk100Theorems/PerfectNumbers.lean,Archive/Wiedijk100Theorems/SolutionOfCubicQuartic.lean,Archive/Wiedijk100Theorems/SumOfPrimeReciprocalsDiverges.lean,Archive/ZagierTwoSquares.lean,Counterexamples/CanonicallyOrderedCommSemiringTwoMul.lean,Counterexamples/CharPZeroNeCharZero.lean,Counterexamples/CliffordAlgebraNotInjective.lean,Counterexamples/Cyclotomic105.lean,Counterexamples/DimensionPolynomial.lean,Counterexamples/DirectSumIsInternal.lean,Counterexamples/DiscreteTopologyNonDiscreteUniformity.lean,Counterexamples/EulerSumOfPowers.lean,Counterexamples/Girard.lean,Counterexamples/HeawoodUnitDistance.lean,Counterexamples/HomogeneousPrimeNotPrime.lean,Counterexamples/IrrationalPowerOfIrrational.lean,Counterexamples/MapFloor.lean,Counterexamples/MonicNonRegular.lean,Counterexamples/Motzkin.lean,Counterexamples/NowhereDifferentiable.lean,Counterexamples/OrderedCancelAddCommMonoidWithBounds.lean,Counterexamples/PeanoCurve.lean,Counterexamples/Phillips.lean,Counterexamples/PolynomialIsDomain.lean,Counterexamples/Pseudoelement.lean,Counterexamples/QuadraticForm.lean,Counterexamples/SeminormLatticeNotDistrib.lean,Counterexamples/SeparableNotSecondCountable.lean,Counterexamples/SorgenfreyLine.lean,Counterexamples/ZeroDivisorsInAddMonoidAlgebras.lean 97 9 ['JovanGerb', 'github-actions', 'grunweg', 'mathlib-merge-conflicts'] dwrensha
assignee:dwrensha
71-84296
2 months ago
28-84464
28 days ago
11-44755
11 days
36503 Mrigna01
author:Mrigna01
 Add false theorem test file --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor 135/0 Mathlib/FalseBench/FalseTheorems.lean 1 3 ['github-actions'] nobody
71-80627
2 months ago
71-80717
71 days ago
71-80428
71 days
36018 wwylele
author:wwylele
 feat(LinearAlgebra/AffineSpace): shifting a subspace towards a point (part 2) This is preparing to calculate the volume of a simplex by integrating the cross-section created by shifting the base plane. Part of #34826. --- - [ ] depends on: #38220 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra blocked-by-other-PR
label:t-algebra$
 254/0 Mathlib.lean,Mathlib/LinearAlgebra/AffineSpace/AffineSubspace/Shift.lean,Mathlib/LinearAlgebra/AffineSpace/Simplex/Basic.lean 3 8 ['copilot-pull-request-reviewer', 'github-actions', 'mathlib-bors', 'mathlib-dependent-issues'] nobody
71-79648
2 months ago
34-3678
34 days ago
37-76325
37 days
30352 kckennylau
author:kckennylau
 feat(RingTheory): Homogeneous localization of tensor product Let `𝒜` be a graded `R`-algebra, and `S` be an `R`-algebra. Then `S ⊗[R] 𝒜` is a graded `S`-algebra with the same grading. Let `W` be a homogeneous submonoid of `𝒜`. Then `(S⊗[R]𝒜)[(1⊗W)⁻¹]₀ ≅ S ⊗[R] (𝒜[W⁻¹]₀)`. --- Split from #26061. - [x] depends on: #30173 - [x] depends on: #30322 - [x] depends on: #30365 - [x] depends on: #36252 Optionally depends on #30379 (graded ring equiv) and #36346 (simp Algebra.algHom), which will save a few lines here, so they are not high priority for this PR. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra awaiting-author merge-conflict
label:t-algebra$
 471/22 Mathlib.lean,Mathlib/RingTheory/GradedAlgebra/Basic.lean,Mathlib/RingTheory/GradedAlgebra/HomogeneousLocalization.lean,Mathlib/RingTheory/GradedAlgebra/TensorLocalization.lean,Mathlib/RingTheory/Localization/TensorProduct.lean 5 5 ['dagurtomas', 'github-actions', 'mathlib-dependent-issues', 'mathlib-merge-conflicts', 'mathlib4-merge-conflict-bot'] dagurtomas
assignee:dagurtomas
71-75802
2 months ago
64-11549
64 days ago
11-55488
11 days
36346 kckennylau
author:kckennylau
 chore: add simp lemma to unfold Algebra.algHom ```lean @[simp] lemma Algebra.coe_algHom : ⇑(Algebra.algHom R A B) = algebraMap A B := rfl ``` --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra awaiting-author
label:t-algebra$
 6/2 Mathlib/Algebra/Algebra/Hom.lean,Mathlib/RingTheory/Etale/StandardEtale.lean 2 5 ['acmepjz', 'artie2000', 'github-actions', 'ocfnash'] ocfnash
assignee:ocfnash
71-75794
2 months ago
49-44266
49 days ago
26-21993
26 days
26803 bjoernkjoshanssen
author:bjoernkjoshanssen
 feat: second partial derivatives test We prove that if `f` is a real-valued function on `n`-dimensional Euclidean space with vanishing gradient at `x₀`, having a power series on a ball of positive radius around `x₀`, whose second Frechét derivative is positive definite at `x₀`, then `f` has local minimum at `x₀`. This project was started at the Lean for Mathematicians workshop hosted by the Simons Foundation in June 2025 in a group consisting of Bjørn Kjos-Hanssen, Erin Griffin, Asaf Kapota, and Janani Lakshmanan, see repo at https://github.com/bjoernkjoshanssen/secondpartial --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-analysis awaiting-author 572/0 Mathlib.lean,Mathlib/Analysis/Calculus/PartialDerivativeTest.lean,Mathlib/Analysis/Normed/Operator/NormedSpace.lean,Mathlib/Topology/Constructions.lean 4 32 ['bjoernkjoshanssen', 'github-actions', 'j-loreaux', 'mathlib4-merge-conflict-bot', 'themathqueen'] j-loreaux
assignee:j-loreaux
71-67903
2 months ago
94-4568
94 days ago
9-48004
9 days
14603 awueth
author:awueth
 feat: degree is invariant under graph isomorphism --- Mathlib has the definition `SimpleGraph.Iso.mapNeighborSet` which is an equivalence between neighbor sets induced by an isomorphism. Would it be beneficial to add the same equivalence for `neighborFinset`? [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) WIP t-combinatorics new-contributor 24/0 Mathlib/Combinatorics/SimpleGraph/Map/Finite.lean 1 12 ['SnirBroshi', 'awueth', 'github-actions', 'jcommelin', 'kim-em', 'urkud'] nobody
71-62025
2 months ago
648-22464
648 days ago
31-44440
31 days
35956 Scarlett-le
author:Scarlett-le
 feat: add orthogonality lemmas for inner product spacesonal ## Summary Adds two lemmas about orthogonality in inner product spaces. ## New declarations - `real_inner_sub_smul_div_inner_self_eq_zero` (`Mathlib.Analysis.InnerProductSpace.Basic`): the inner product of `u - (⟪u, d⟫_ℝ / ⟪d, d⟫_ℝ) • d` with `d` is zero; subtracting the orthogonal projection of `u` onto `d` yields a vector orthogonal to `d`. Holds unconditionally including when `d = 0`. - `mem_span_singleton_of_inner_eq_zero_of_inner_eq_zero` (`Mathlib.Analysis.InnerProductSpace.Projection.FiniteDimensional`): in a two-dimensional inner product space, if nonzero vectors `w` and `u` are both orthogonal to the same nonzero vector `v`, then `u` lies in the span of `w`. t-analysis awaiting-author 26/0 Mathlib/Analysis/InnerProductSpace/Projection/FiniteDimensional.lean 1 9 ['Scarlett-le', 'github-actions', 'j-loreaux'] sgouezel
assignee:sgouezel
71-51955
2 months ago
65-16287
65 days ago
10-34309
10 days
33599 nielstron
author:nielstron
 feat(Computability/ContextFreeGrammar): closure under union --- This PR picks up https://github.com/leanprover-community/mathlib4/pull/13514 and resolves the outstanding errors. - [ ] depends on: #33592 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) blocked-by-other-PR t-computability new-contributor 498/0 Mathlib/Computability/ContextFreeGrammar.lean 1 2 ['github-actions', 'mathlib4-dependent-issues-bot'] nobody
71-45462
2 months ago
126-54321
126 days ago
10-65787
10 days
9605 davikrehalt
author:davikrehalt
 feat(Data/Finset & List): Add Lemmas for Sorting and Filtering This PR includes several useful lemmas to the Data/Finset and Data/List modules in Lean's mathlib: 1. `toFinset_filter` (List): Shows that filtering commutes with toFinset. 2. `toFinset_is_singleton_implies_replicate` (List): Shows a list with a singleton toFinset is a List.replicate. 3. `filter_sort_commute` (Finset): Sorting and filtering can be interchanged in Finsets. 4. `Sorted.filter` (List): A sorted list stays sorted after filtering. 5. `Sorted.append_largest` (List): Appending the largest element keeps a list sorted. 6. `sort_monotone_map` (Finset): Relates sorting of a Finset after mapping to sorting of a list. 7. `sort_insert_largest` (Finset): Sorting a Finset with an inserted largest element. 8. `sort_range` (Finset): Sorting a range in a Finset equals the corresponding range list. 9. ~~`filter_eval_true` (List): Filtering a list with a predicate always true keeps the list unchanged.~~ 10. ~~`filter_eval_false` (List): Filtering with an always-false predicate gives an empty list.~~ 11. ~~`pairwise_concat` (List): Iff condition for Pairwise relation in concatenated lists (similar to pairwise_join).~~ 12. `list_map_toFinset` (Finset): toFinset commutes with map under injection --- - [x] depends on: #15952 This is my first PR to mathlib, so I'm not too familiar with etiquette's and more specifically there are two proofs in the PR which uses aesop, and I am not sure if it's frowned upon. I kept the aesop in there for now as I couldn't construct very short proofs otherwise. The sort_range function proof was suggested in https://leanprover.zulipchat.com/#narrow/stream/113489-new-members/topic/Computing.20Finset.20sort.20of.20Finset.20range/near/410346731 by Ruben Van de Velde. Thanks for your time for improving this PR. please-adopt t-data new-contributor merge-conflict awaiting-author 71/0 Mathlib/Data/Finset/Basic.lean,Mathlib/Data/Finset/Image.lean,Mathlib/Data/Finset/Sort.lean,Mathlib/Data/List/Sort.lean 4 30 ['YaelDillies', 'davikrehalt', 'eric-wieser', 'github-actions', 'jcommelin', 'urkud', 'vihdzp'] nobody
71-44918
2 months ago
851-16406
851 days ago
12-48883
12 days
10332 adri326
author:adri326
 feat(Topology/Sets): define regular open sets and their boolean algebra Introduces a new module, `Mathlib.Topology.Sets.RegularOpens`, which defines the `IsRegularOpen s` predicate (`interior (closure s) = s`) and `TopologicalSpace.RegularOpens`, the type of bundled regular open sets (defined as `Heyting.Regular (Opens X)`). A few properties of regular open sets (bundled and unbundled) and `interior (closure s)` are proven, and a pointwise instance of `MulAction` is provided for regular open sets. --- This PR belongs to my series of PRs around my formalization of Rubin's theorem. There are two possible ways to implement `RegularOpens`: - either construct them by hand and show that they form a boolean algebra (better def-eq but more boilerplate code required) - or use `Heyting.Regular` on the heyting algebra of `Opens` inherited from the `Frame` instance on them I first chose to use the former approach, but using the latter cuts the length of the construction of the boolean algebra of regular open sets by 100 lines of code, and allows us to inherit all of the helper lemmas defined for `Heyting.Regular`. The big downside, though, is that an element of `RegularOpens` isn't defined as a bundled regular open set anymore, but rather as an `Opens` set `s` for which `Opens.interior ↑(Opens.interior ↑sᶜ)ᶜ = s`, so I added an alternative constructor `RegularOpens.of` that instead accepts any set `s` for which `IsRegularOpen s` holds. Another minor downside is that coercion to a set takes two coercions instead of one. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict WIP t-topology 434/0 Mathlib.lean,Mathlib/Data/Set/Pointwise/SMul.lean,Mathlib/Topology/Sets/Opens.lean,Mathlib/Topology/Sets/RegularOpens.lean,docs/references.bib 5 1 ['adri326'] nobody
71-44885
2 months ago
835-28326
835 days ago
0-1135
18 minutes
36428 linesthatinterlace
author:linesthatinterlace
 feat(Logic/Equiv/Fin): Streamline equiv definitions using mkDivMod This PR uses Fin.mkDivMod to streamline the related equivalence and introduces Nat.mkDivMod to a similar end. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-logic WIP 24/29 Mathlib/Analysis/SpecialFunctions/Complex/Arctan.lean,Mathlib/Analysis/SpecialFunctions/Trigonometric/Series.lean,Mathlib/Data/Nat/Init.lean,Mathlib/Logic/Equiv/Fin/Basic.lean,Mathlib/Order/Partition/Equipartition.lean 2 4 ['JovanGerb', 'github-actions', 'linesthatinterlace'] nobody
71-44212
2 months ago
64-23582
64 days ago
0-6487
1 hour
36496 erdOne
author:erdOne
 feat(Tactic/Linter): lint against `simpa ... using by tactic` --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-linter large-import awaiting-author merge-conflict 134/12 Mathlib.lean,Mathlib/Analysis/LConvolution.lean,Mathlib/Combinatorics/SimpleGraph/Connectivity/Connected.lean,Mathlib/Condensed/Light/Epi.lean,Mathlib/Init.lean,Mathlib/MeasureTheory/Function/LpSeminorm/Basic.lean,Mathlib/Order/ConditionallyCompleteLattice/Indexed.lean,Mathlib/Probability/Distributions/Poisson/Basic.lean,Mathlib/Probability/Kernel/Composition/Comp.lean,Mathlib/Probability/Kernel/Composition/ParallelComp.lean,Mathlib/Probability/Kernel/Condexp.lean,Mathlib/Probability/Moments/SubGaussian.lean,Mathlib/Tactic.lean,Mathlib/Tactic/Linter/SimpaUsingBy.lean,MathlibTest/simpaUsingBy.lean 15 24 ['erdOne', 'github-actions', 'grunweg', 'mathlib-merge-conflicts'] grunweg
assignee:grunweg
71-44195
2 months ago
71-84588
71 days ago
0-2953
49 minutes
36533 Bergschaf
author:Bergschaf
 feat(Order/Sublocales): Closed sublocales This PR introduces closed sublocales and their property being the complement of Open sublocales in the Coframe of sublocales. The embedding from closed sublocales into sublocales is a coframeHom, which is also added in this PR. If this PR is to large, I can also factor this part out (although it should be quite uncontroversial since i basically copied everything from frameHom). - [ ] depends on: #25978 --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-order blocked-by-other-PR 439/37 Mathlib/Order/Hom/CompleteLattice.lean,Mathlib/Order/Nucleus.lean,Mathlib/Order/Sublocale.lean 3 2 ['github-actions', 'mathlib-dependent-issues'] nobody
71-29501
2 months ago
71-30666
71 days ago
0-248
4 minutes
35652 dennj
author:dennj
 feat(LinearAlgebra/Matrix): add `Matrix.mul_eq_smul_one_symm` Adds three lemmas: - IsLeftRegular.mul_eq_of_comm (Algebra/Group/Defs.lean): if a is left-regular, a * b = c, and c commutes with a, then b * a = c. Generalises IsLeftRegular.mul_eq_one_symm from the c = 1 case. - IsRightRegular.mul_eq_of_comm: symmetric version. - mul_eq_smul_one_symm (Algebra/Group/Action/Defs.lean): scalar variant of mul_eq_one_symm. For a monoid β with a compatible scalar action by α, if a * b = c • 1 and a is left-regular, then b * a = c • 1. Proven in one line via IsLeftRegular.mul_eq_of_comm, since c • 1 is central thanks to IsScalarTower α β β and SMulCommClass α β β. The additive analogues are produced by to_additive. The general mul_eq_of_comm helpers capture the underlying pattern: "a left/right-regular element can be cancelled when the conclusion commutes with it" and are reusable beyond this PR's specialisation. Human made PR t-algebra new-contributor LLM-generated awaiting-author
label:t-algebra$
 28/0 Mathlib/Algebra/Group/Action/Defs.lean,Mathlib/Algebra/Group/Defs.lean 1 7 ['dagurtomas', 'dennj', 'eric-wieser', 'github-actions', 'grunweg'] ocfnash
assignee:ocfnash
71-25161
2 months ago
18-80964
18 days ago
24-65258
24 days
36540 faenuccio
author:faenuccio
 perf: personal grind test Private test WIP t-algebra
label:t-algebra$
 5/0 Mathlib/Algebra/Ring/Nat.lean 1 4 ['faenuccio', 'github-actions', 'leanprover-radar'] faenuccio
assignee:faenuccio
71-20650
2 months ago
71-23679
71 days ago
0-16
16 seconds
35263 astrainfinita
author:astrainfinita
 refactor: use `OrderSupInfSet` --- - [ ] depends on: #35297 - [ ] depends on: #35328 - [ ] depends on: #35774 - [ ] depends on: #35674 [Zulip](https://leanprover.zulipchat.com/#narrow/channel/113488-general/topic/Any.20infimum.20based.20version.20of.20.60OmegaCompletePartialOrder.60.3F/with/573799342) [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-order large-import blocked-by-other-PR merge-conflict 952/701 Mathlib/Algebra/Group/Submonoid/Basic.lean,Mathlib/Algebra/Module/Submodule/Lattice.lean,Mathlib/Algebra/Order/Nonneg/Lattice.lean,Mathlib/Algebra/Tropical/Lattice.lean,Mathlib/AlgebraicGeometry/IdealSheaf/Basic.lean,Mathlib/Analysis/Seminorm.lean,Mathlib/CategoryTheory/Category/Pairwise.lean,Mathlib/CategoryTheory/Limits/Lattice.lean,Mathlib/CategoryTheory/Sites/Sieves.lean,Mathlib/CategoryTheory/Subfunctor/Basic.lean,Mathlib/CategoryTheory/Subobject/Lattice.lean,Mathlib/Combinatorics/Digraph/Basic.lean,Mathlib/Combinatorics/SimpleGraph/Acyclic.lean,Mathlib/Combinatorics/SimpleGraph/Basic.lean,Mathlib/Combinatorics/SimpleGraph/Subgraph.lean,Mathlib/Data/Fintype/Order.lean,Mathlib/Data/Int/ConditionallyCompleteOrder.lean,Mathlib/Data/NNReal/Defs.lean,Mathlib/Data/Nat/Lattice.lean,Mathlib/Data/Real/Archimedean.lean,Mathlib/Data/Set/BooleanAlgebra.lean,Mathlib/Geometry/Convex/Cone/Basic.lean,Mathlib/LinearAlgebra/AffineSpace/AffineSubspace/Defs.lean,Mathlib/MeasureTheory/Measure/MeasureSpace.lean,Mathlib/Order/Atoms.lean,Mathlib/Order/Bounds/Basic.lean,Mathlib/Order/Bounds/Defs.lean,Mathlib/Order/Bounds/Image.lean,Mathlib/Order/CompactlyGenerated/Basic.lean,Mathlib/Order/CompleteBooleanAlgebra.lean,Mathlib/Order/CompleteLattice/Basic.lean,Mathlib/Order/CompleteLattice/Defs.lean,Mathlib/Order/CompleteLattice/Lemmas.lean,Mathlib/Order/CompleteLattice/PiLex.lean,Mathlib/Order/CompleteLatticeIntervals.lean,Mathlib/Order/Concept.lean,Mathlib/Order/ConditionallyCompleteLattice/Basic.lean,Mathlib/Order/ConditionallyCompleteLattice/Defs.lean,Mathlib/Order/ConditionallyCompleteLattice/Indexed.lean,Mathlib/Order/Copy.lean,Mathlib/Order/Filter/Basic.lean,Mathlib/Order/FixedPoints.lean,Mathlib/Order/GaloisConnection/Basic.lean,Mathlib/Order/Hom/Order.lean,Mathlib/Order/Interval/Basic.lean,Mathlib/Order/LiminfLimsup.lean,Mathlib/Order/Nucleus.lean,Mathlib/Order/ScottContinuity/Prod.lean,Mathlib/Order/SupClosed.lean,Mathlib/Probability/Process/Filtration.lean,Mathlib/RingTheory/TwoSidedIdeal/Lattice.lean,Mathlib/SetTheory/Cardinal/Order.lean,Mathlib/SetTheory/Ordinal/Basic.lean,Mathlib/Topology/Algebra/Group/GroupTopology.lean,Mathlib/Topology/Algebra/Module/ClosedSubmodule.lean,Mathlib/Topology/Algebra/Ring/Basic.lean,Mathlib/Topology/Order/HullKernel.lean,Mathlib/Topology/UniformSpace/Basic.lean 58 3 ['github-actions', 'mathlib-dependent-issues', 'mathlib-merge-conflicts'] nobody
71-18836
2 months ago
unknown
0-0
0 seconds
36544 xroblot
author:xroblot
 feat(RingTheory/Ideal): restriction maps on decomposition and inertia groups in a Galois tower Adds a new file `Mathlib/RingTheory/Ideal/Galois.lean` with results on the action of `Gal(L/K)` on ideals of a ring `B ⊆ L` for a Galois subextension `F/K` of `L/K`. The main results are the surjectivity and kernel descriptions of the natural maps from the decomposition (resp. inertia) group of `P` in `Gal(L/K)` to the decomposition (resp. inertia) group of `p` in `Gal(F/K)`, induced by restriction. --- - [ ] depends on: #38153 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-ring-theory awaiting-author WIP blocked-by-other-PR 223/0 Mathlib.lean,Mathlib/FieldTheory/Normal/Defs.lean,Mathlib/RingTheory/Ideal/Galois.lean 4 18 ['copilot-pull-request-reviewer', 'github-actions', 'mathlib-dependent-issues', 'riccardobrasca', 'tb65536', 'xroblot'] riccardobrasca
assignee:riccardobrasca
71-14928
2 months ago
36-45093
36 days ago
34-56618
34 days
32410 callesonne
author:callesonne
 feat(Bicategory/FunctorCategory/Pseudo): Add evaluation pseudofunctor Adding pseudofunctors `eval` and `evaluation`. WIP PR to access CI. --- - [x] depends on: #30926 - [x] depends on: #32468 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict WIP t-category-theory 49/10 Mathlib/CategoryTheory/Bicategory/Functor/StrictlyUnitary.lean,Mathlib/CategoryTheory/Bicategory/FunctorBicategory/Pseudo.lean,Mathlib/CategoryTheory/Bicategory/Modification/Pseudo.lean,Mathlib/CategoryTheory/Bicategory/NaturalTransformation/Pseudo.lean,Mathlib/CategoryTheory/Products/Basic.lean 5 3 ['github-actions', 'mathlib-dependent-issues', 'mathlib4-merge-conflict-bot'] nobody
71-690
2 months ago
169-81221
169 days ago
0-9
9 seconds
31901 callesonne
author:callesonne
 feat(Bicategory/Subbicategory): add full subbicategories using `ObjectProperty` Analogously to the 1-categorical setting we construct a full subbicategory from an object property. One could also construct locally full subbicategories using a pair of an object property and a morphism property. However then there is no way to obtain the bicategory structure by specializing from the `InducedBicategory` case. It is not clear to me if we want a full subbicategory to be specialized from this other construction, or from `InducedBicategory`. --- - [x] depends on: #30925 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-category-theory awaiting-author merge-conflict 135/2 Mathlib.lean,Mathlib/CategoryTheory/Bicategory/Basic.lean,Mathlib/CategoryTheory/Bicategory/InducedBicategory.lean,Mathlib/CategoryTheory/Bicategory/Subbicategory.lean 4 8 ['callesonne', 'github-actions', 'leanprover-radar', 'mathlib-merge-conflicts', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot', 'robin-carlier'] nobody
71-619
2 months ago
168-23190
168 days ago
2-61446
2 days
34078 joneugster
author:joneugster
 feat(scripts/autolabel): add label dependencies for better automatic label assignment --- This is a tracking-PR containing the complete list of proposed labels. As there might be room for discussion about these settings, there will be smaller PRs adding these dependencies in smaller batches. - [x] depends on: #34948 - [x] depends on: #34949 - [x] depends on: #34066 - [x] depends on: #34079 - [x] depends on: #34677 - [x] depends on: #34678 - [ ] depends on: #34952 - [x] depends on: #36242 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) blocked-by-other-PR CI merge-conflict 88/34 scripts/autolabel.lean 1 4 ['github-actions', 'mathlib-merge-conflicts', 'mathlib4-dependent-issues-bot'] nobody
70-84578
2 months ago
unknown
0-0
0 seconds
36572 JovanGerb
author:JovanGerb
 feat(CategoryTheory/Limits/IsLimit): use `to_dual` on `IsLimit` This PR makes a start at translating `IsLimit` using `to_dual`. --- - [ ] depends on: #35031 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-category-theory 290/637 Mathlib/CategoryTheory/Category/Basic.lean,Mathlib/CategoryTheory/Functor/Basic.lean,Mathlib/CategoryTheory/Functor/Category.lean,Mathlib/CategoryTheory/Functor/FullyFaithful.lean,Mathlib/CategoryTheory/Functor/ReflectsIso/Basic.lean,Mathlib/CategoryTheory/Iso.lean,Mathlib/CategoryTheory/Limits/Cones.lean,Mathlib/CategoryTheory/Limits/Constructions/Filtered.lean,Mathlib/CategoryTheory/Limits/IsLimit.lean,Mathlib/CategoryTheory/Limits/Shapes/NormalMono/Basic.lean,Mathlib/CategoryTheory/Limits/Shapes/Reflexive.lean,Mathlib/CategoryTheory/NatIso.lean,Mathlib/CategoryTheory/NatTrans.lean,Mathlib/CategoryTheory/Opposites.lean,Mathlib/CategoryTheory/Whiskering.lean,Mathlib/Combinatorics/Quiver/Basic.lean,Mathlib/Tactic/Translate/Core.lean 17 2 ['github-actions', 'mathlib-dependent-issues'] nobody
70-79739
2 months ago
70-76227
70 days ago
0-3586
59 minutes
34952 joneugster
author:joneugster
 feat(scripts/autolabel): use `Cli` and integrate `curl` call into `autolabel` - use `Cli` for `lake exe autolabel` - add arguments `--pr xxx --gh` and `--pr xxx --curl ` to chose between different interaction methods with github - add `--force` to skip the check whether labels are already present. (note: the current `curl` setup doesn't perform this step and neither does the refactor, so I added a `Todo` to remember this. ) - make CI-workflow simpler and more robust by removing current stdout-parsing of the debug-messages which `autolabel` emits. ### Testing Make some local changes and commit them. Ensure your local `origin/master` is in sync with `upstream/master` if you are on a fork. - `lake exe autolabel`: prints the labels which would be applicable - `lake exe autolabel --pr 34952 --gh --force` adds these labels to this PR using `gh`. - `lake exe autolabel --pr 34952 --gh` adds these labels to this PR using `gh` if no topic labels are present. - `lake exe autolabel --pr 34952 --curl ` adds these labels to this PR using `curl`. This requires a github access token for authentication --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) CI 85/72 .github/workflows/add_label_from_diff.yaml,scripts/autolabel.lean 2 4 ['github-actions', 'mathlib-merge-conflicts'] nobody
70-75781
2 months ago
54-36390
54 days ago
86-76939
86 days
36086 Multramate
author:Multramate
 feat(Algebra): add liftEquiv for groups, rings, algebras, and adjoin roots --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra awaiting-author merge-conflict
label:t-algebra$
 105/22 Mathlib/Algebra/Polynomial/AlgebraMap.lean,Mathlib/Algebra/Polynomial/Bivariate.lean,Mathlib/FieldTheory/Galois/Basic.lean,Mathlib/FieldTheory/Galois/Infinite.lean,Mathlib/FieldTheory/RatFunc/Luroth.lean,Mathlib/GroupTheory/GroupExtension/Basic.lean,Mathlib/GroupTheory/QuotientGroup/Defs.lean,Mathlib/GroupTheory/SpecificGroups/Cyclic.lean,Mathlib/RingTheory/AdjoinRoot.lean,Mathlib/RingTheory/Ideal/Quotient/Operations.lean,Mathlib/RingTheory/Invariant/Basic.lean,Mathlib/RingTheory/Valuation/ValuationSubring.lean 12 7 ['CBirkbeck', 'Multramate', 'dagurtomas', 'github-actions', 'mathlib-merge-conflicts'] dagurtomas
assignee:dagurtomas
70-75776
2 months ago
64-19925
64 days ago
15-18023
15 days
36146 Multramate
author:Multramate
 feat(AlgebraicGeometry/GammaSpecAdjunction): add equivalences for Spec morphisms that commute with algebra maps --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebraic-geometry t-algebra awaiting-author
label:t-algebra$
 46/2 Mathlib/Algebra/Category/CommAlgCat/Basic.lean,Mathlib/AlgebraicGeometry/GammaSpecAdjunction.lean,Mathlib/AlgebraicGeometry/Scheme.lean 3 18 ['CBirkbeck', 'Multramate', 'chrisflav', 'erdOne', 'github-actions'] dagurtomas
assignee:dagurtomas
70-75775
2 months ago
66-22005
66 days ago
12-46044
12 days
35822 SnirBroshi
author:SnirBroshi
 feat(Order/ConditionallyCompleteLattice): `sSup (f '' s) ≤ f (sSup s)` --- #35260 will add `iSup` versions. (edit: it was merged, and it's only for `[Finite ι]`) Future work (though I'm not sure if it's possible): `Antitone`, `MonotoneOn`, `AntitoneOn` [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-order awaiting-author 38/1 Mathlib/Order/ConditionallyCompleteLattice/Basic.lean,Mathlib/Order/ConditionallyCompleteLattice/Finset.lean 2 8 ['Komyyy', 'SnirBroshi', 'github-actions', 'vihdzp'] Komyyy
assignee:Komyyy
70-72296
2 months ago
69-35652
69 days ago
15-68575
15 days
29856 mans0954
author:mans0954
 feat(Analysis/Normed/Ring/Basic): Add NonUnitalNonAssocSeminormedRing and NonUnitalNonAssocNormedRing Adds the classes `NonUnitalNonAssocSeminormedRing` and `NonUnitalNonAssocNormedRing` and relaxes the `NonUnitalSeminormedRing` section to `NonUnitalNonAssocSeminormedRing`. Examples of non-unital non-associative normed rings include non-untial JB-algebras and non-unital JB*-algebras. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-analysis please-adopt 110/11 Mathlib/Analysis/Normed/Ring/Basic.lean,MathlibTest/TCSynth.lean 2 15 ['github-actions', 'j-loreaux', 'leanprover-bot'] ADedecker and j-loreaux
assignee:j-loreaux assignee:ADedecker
70-67203
2 months ago
184-86390
184 days ago
57-16399
57 days
34846 fpvandoorn
author:fpvandoorn
 fix: module system and translate interaction * Fix some issues when the value of an imported declaration is not available. This could cause `to_additive` to panic or turn the declaration into an axiom. * Don't print private names in messages * Don't panic when the declaration already exists modulo privateness. * Add some helper functions to `Lean.Environment` and `Lean.Meta`. --- Please double check the `PublicOrPrivate` declarations: - Do they already exist in core? - Does `addDeclSafe` catch all cases where `addDecl` would panic? I think these are useful (maybe after renaming) since some of the Core versions are a huge footgun, which can lead to panics in multiple ways. - [ ] depends on: #35134 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-meta awaiting-author blocked-by-other-PR merge-conflict 233/50 Mathlib/Lean/Environment.lean,Mathlib/Lean/Meta.lean,Mathlib/Tactic/Translate/Core.lean,MathlibTest/ToAdditiveModule.lean,MathlibTest/ToDual.lean,MathlibTest/toAdditive.lean 6 37 ['JovanGerb', 'fpvandoorn', 'github-actions', 'grunweg', 'mathlib-dependent-issues', 'mathlib-merge-conflicts'] nobody
70-65632
2 months ago
105-9674
105 days ago
0-11069
3 hours
33466 Shreyas4991
author:Shreyas4991
 refactor(Combinatorics/Digraph): add vertex sets --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-combinatorics merge-conflict please-adopt 382/55 Mathlib/Combinatorics/Digraph/Basic.lean,Mathlib/Combinatorics/Digraph/Orientation.lean 2 83 ['IvanRenison', 'Shreyas4991', 'SnirBroshi', 'YaelDillies', 'copilot-pull-request-reviewer', 'github-actions', 'mathlib-merge-conflicts', 'mathlib4-merge-conflict-bot', 'vihdzp', 'vlad902'] awainverse
assignee:awainverse
70-57498
2 months ago
70-57498
70 days ago
27-54087
27 days
36587 yhx-12243
author:yhx-12243
 feat(Algebra/GCDMonoid): Distributive lattice structure for Associates in GCDMonoid Add a distributive lattice structure for `Associates α` in `GCDMonoid`. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra new-contributor
label:t-algebra$
 60/3 Mathlib.lean,Mathlib/Algebra/GCDMonoid/Basic.lean,Mathlib/Algebra/GCDMonoid/DistribLattice.lean 2 2 ['github-actions'] nobody
70-53739
2 months ago
67-24314
67 days ago
3-29502
3 days
35662 FrankieeW
author:FrankieeW
 feat(NumberTheory/Zsqrtd): add Archimedean instance via le_arch This PR follows a suggestion made in #35606 , #35481 - add `Zsqrtd.le_arch_smul` in `Mathlib/NumberTheory/Zsqrtd/Basic.lean` - use it to provide `instance : Archimedean (ℤ√d)` in the `Nonsquare` section - refactor the proof using symmetry to reduce duplication while keeping checks clean --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-number-theory new-contributor awaiting-author merge-conflict LLM-generated 46/4 Mathlib/NumberTheory/PellMatiyasevic.lean,Mathlib/NumberTheory/Zsqrtd/Basic.lean 2 13 ['FrankieeW', 'MichaelStollBayreuth', 'euprunin', 'github-actions', 'mathlib-merge-conflicts', 'tb65536'] MichaelStollBayreuth
assignee:MichaelStollBayreuth
70-53475
2 months ago
73-31591
73 days ago
15-50475
15 days
36418 j-loreaux
author:j-loreaux
 feat: add `IsMulCommutative` instances for topological closures of subobjects --- - [ ] depends on: #36549 - [ ] depends on: #36552 - [ ] depends on: #36553 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-topology t-algebra merge-conflict blocked-by-other-PR
label:t-algebra$
 1047/162 Mathlib/Algebra/Algebra/NonUnitalSubalgebra.lean,Mathlib/Algebra/Algebra/Subalgebra/Basic.lean,Mathlib/Algebra/Algebra/Subalgebra/Directed.lean,Mathlib/Algebra/Algebra/Subalgebra/Lattice.lean,Mathlib/Algebra/Group/Commute/Defs.lean,Mathlib/Algebra/Group/Defs.lean,Mathlib/Algebra/Group/Subgroup/Defs.lean,Mathlib/Algebra/Group/Subgroup/Lattice.lean,Mathlib/Algebra/Group/Subgroup/Map.lean,Mathlib/Algebra/Group/Submonoid/Defs.lean,Mathlib/Algebra/Group/Submonoid/Membership.lean,Mathlib/Algebra/Group/Subsemigroup/Defs.lean,Mathlib/Algebra/Group/Subsemigroup/Membership.lean,Mathlib/Algebra/HierarchyDesign.lean,Mathlib/Algebra/Ring/Defs.lean,Mathlib/Algebra/Ring/Subring/Basic.lean,Mathlib/Algebra/Ring/Subsemiring/Basic.lean,Mathlib/Algebra/Star/NonUnitalSubalgebra.lean,Mathlib/Algebra/Star/SelfAdjoint.lean,Mathlib/Algebra/Star/Subalgebra.lean,Mathlib/CategoryTheory/Center/Linear.lean,Mathlib/CategoryTheory/Center/NegOnePow.lean,Mathlib/CategoryTheory/Monoidal/Cartesian/Grp_.lean,Mathlib/CategoryTheory/Monoidal/Cartesian/Mon_.lean,Mathlib/Data/ZMod/QuotientGroup.lean,Mathlib/FieldTheory/Galois/Abelian.lean,Mathlib/GroupTheory/Focal.lean,Mathlib/GroupTheory/IsPerfect.lean,Mathlib/GroupTheory/Schreier.lean,Mathlib/GroupTheory/SchurZassenhaus.lean,Mathlib/GroupTheory/SpecificGroups/Cyclic.lean,Mathlib/GroupTheory/SpecificGroups/ZGroup.lean,Mathlib/GroupTheory/Subgroup/Centralizer.lean,Mathlib/GroupTheory/Submonoid/Centralizer.lean,Mathlib/GroupTheory/Subsemigroup/Centralizer.lean,Mathlib/GroupTheory/Transfer.lean,Mathlib/NumberTheory/NumberField/CMField.lean,Mathlib/RepresentationTheory/AlgebraRepresentation/Basic.lean,Mathlib/RepresentationTheory/Irreducible.lean,Mathlib/RingTheory/NonUnitalSubring/Basic.lean,Mathlib/RingTheory/NonUnitalSubring/Defs.lean,Mathlib/RingTheory/NonUnitalSubsemiring/Basic.lean,Mathlib/RingTheory/NonUnitalSubsemiring/Defs.lean,Mathlib/Topology/Algebra/Algebra.lean,Mathlib/Topology/Algebra/Group/Basic.lean,Mathlib/Topology/Algebra/Monoid.lean,Mathlib/Topology/Algebra/NonUnitalAlgebra.lean,Mathlib/Topology/Algebra/NonUnitalStarAlgebra.lean,Mathlib/Topology/Algebra/Ring/Basic.lean,Mathlib/Topology/Algebra/StarSubalgebra.lean 50 8 ['github-actions', 'j-loreaux', 'leanprover-radar', 'mathlib-dependent-issues', 'mathlib-merge-conflicts'] nobody
70-53463
2 months ago
71-9263
71 days ago
0-85
1 minute
36563 EtienneC30
author:EtienneC30
 feat: brownian processes --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) brownian t-measure-probability merge-conflict 1517/1 Mathlib.lean,Mathlib/MeasureTheory/Function/L2Space.lean,Mathlib/MeasureTheory/MeasurableSpace/Constructions.lean,Mathlib/Probability/BrownianMotion/GaussianProjectiveFamily.lean,Mathlib/Probability/BrownianMotion/IsBrownian.lean,Mathlib/Probability/Distributions/Gaussian/HasGaussianLaw/Basic.lean,Mathlib/Probability/Distributions/Gaussian/Multivariate.lean,Mathlib/Probability/Distributions/Gaussian/Real.lean,Mathlib/Probability/HasLaw.lean,Mathlib/Probability/Moments/Basic.lean,Mathlib/Probability/Moments/Covariance.lean,Mathlib/Probability/Process/Filtration.lean 12 2 ['github-actions', 'mathlib-merge-conflicts'] nobody
70-50112
2 months ago
unknown
0-0
0 seconds
34045 smmercuri
author:smmercuri
 feat: `algebraMap K L` is uniform continuous with respect to adic topologies, when the ideal `w` of `L` lies above `v` - `A` is a Dedekind domain with field of fractions `K`. - `B` is a Dedekind domain with field of fractions `L`. - `L` is a field extension of `K`. - `v` is a height one prime ideal of `A`. - `w` is a height one prime ideal of `B` lying over `v`. Then respective valuations are related via the ramification index, and `algebraMap (WithVal (v.valuation K)) (WithVal (w.valuation L))` is uniform continuous. --- - [x] depends on: #34049 - [x] depends on: #35972 - [x] depends on: #36144 - [x] depends on: #36310 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) FLT t-algebra t-number-theory
label:t-algebra$
 164/4 Mathlib.lean,Mathlib/Algebra/Order/Hom/Units.lean,Mathlib/NumberTheory/RamificationInertia/Valuation.lean,Mathlib/RingTheory/DedekindDomain/AdicValuation.lean,Mathlib/RingTheory/Valuation/Discrete/RankOne.lean,Mathlib/Topology/Algebra/Valued/WithVal.lean 5 10 ['dagurtomas', 'github-actions', 'jjdishere', 'mathlib-dependent-issues', 'mathlib-merge-conflicts', 'smmercuri'] alreadydone
assignee:alreadydone
70-47155
2 months ago
25-29337
25 days ago
43-23588
43 days
36282 smmercuri
author:smmercuri
 chore(Topology/Algebra/Valued/WithVal): remove `@` lemma Prove `Valuation.IsEquiv.uniformContinuous_congr` directly and remove `Valuation.IsEquiv.uniformContinuous` which is not needed. --- - [x] depends on: #36310 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra awaiting-author
label:t-algebra$
 18/32 Mathlib/Topology/Algebra/Valued/WithVal.lean 1 5 ['faenuccio', 'github-actions', 'mathlib-dependent-issues', 'mathlib-merge-conflicts', 'smmercuri'] faenuccio
assignee:faenuccio
70-47002
2 months ago
53-26220
53 days ago
18-25760
18 days
36103 SnkXyx
author:SnkXyx
 feat(Algebra/MvPolynomial/CharacteristicSet): add Characteristic Set This PR adds some definitions and theorems of Characteristic Set Method (also known as Wu's Method). Definitions: * `MvPolynomial.mainDegree` * `MvPolynomial.initialOf` * `MvPolynomial.reducedTo` * `TriangulatedSet` * `MvPolynomial.pseudo` * `MvPolynomial.setPseudo` * `MvPolynomial.isRemainder` * `MvPolynomial.isSetRemainder` * `AscendingSetTheory` * `TriangulatedSet.isAscendingSet` * `HasBasicSet` * `TriangulatedSet.isCharacteristicSet` * `MvPolynomial.List.characteristicSet` * `MvPolynomial.List.zeroDecomposition` Main Theorems: * `MvPolynomial.initialOf_mul_eq`: $init_i(p \cdot q) = init_i(p) \cdot init_i(q)$ if there is no zero divisors in the coefficient ring. * `TriangulatedSet.instWellFoundedLT`: The set of Triangulated Sets is well-founded under the lexicographic ordering. * `MvPolynomial.pseudo_remainder_isRemainder`: The remainder $r$ of $g$ by $f$ is reduced with respect to $f$ and satisfies $init(f)^s \cdot g = q \cdot f + r$ for some $s \in \mathbb{N}$ and $q \in R[X_{\sigma}]$. * `MvPolynomial.setPseudo_remainder_isSetRemainder`: The remainder $r$ of $g$ by a set $S$ is reduced with respect to $S$ and satisfies $(\prod S_i^{e_i}) \cdot g = \sum q_i \cdot S_i + r$ for some sequences $\{e_i\}$ and $\{q_i\}$. * `MvPolynomial.setPseudo_remainder_eq_zero_of_mem`: The remainder of $p$ by a set $S$ is $0$ if $p \in S$. * `MvPolynomial.List.basicSet_append_lt_of_exists_reducedToSet`: Appending an element which is reduced w.r.t. the basic set of list strictly decreases the order. * `MvPolynomial.List.characteristicSet_isCharacteristicSet`: The computed Characteristic Set $CS$ satisfies the key algebraic property (pseudo-remainder of input polynomials is 0) and the geometric property ( $Zero(PS) \subseteq Zero(CS)$ ). * `MvPolynomial.List.vanishingSet_eq_zeroDecomposition_union`: The zero set of a polynomial system $PS$ can be decomposed into a finite union of "quasi-varieties" defined by triangular sets: $Zero(PS) = \bigcup_{CS \in \mathcal{ZD}} Zero(CS / \text{InitialProd}(CS))$ The PR is upstreamized from [github.com/WuProver/lean_characteristic_set](https://github.com/WuProver/lean_characteristic_set) --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) - [x] depends on: #36386 - [x] depends on: #37791 t-algebra new-contributor blocked-by-other-PR
label:t-algebra$
 4085/0 Mathlib.lean,Mathlib/Algebra/MvPolynomial/CharacteristicSet/AscendingSet.lean,Mathlib/Algebra/MvPolynomial/CharacteristicSet/CharacteristicSet.lean,Mathlib/Algebra/MvPolynomial/CharacteristicSet/Initial.lean,Mathlib/Algebra/MvPolynomial/CharacteristicSet/MainDegree.lean,Mathlib/Algebra/MvPolynomial/CharacteristicSet/Order.lean,Mathlib/Algebra/MvPolynomial/CharacteristicSet/PseudoDivision.lean,Mathlib/Algebra/MvPolynomial/CharacteristicSet/Reduce.lean,Mathlib/Algebra/MvPolynomial/CharacteristicSet/StandardAscendingSet.lean,Mathlib/Algebra/MvPolynomial/CharacteristicSet/TriangularSet.lean,Mathlib/Algebra/MvPolynomial/CharacteristicSet/WeakAscendingSet.lean,docs/references.bib 14 20 ['Hagb', 'github-actions', 'mathlib-dependent-issues', 'mathlib-merge-conflicts'] nobody
70-45394
2 months ago
14-45625
14 days ago
19-35726
19 days
35291 mcdoll
author:mcdoll
 feat(Fourier): improved version of Riemann-Lebesgue --- The Riemann-Lebesgue lemma is merely a side note of the fact that we need to relate the extension of the Schwartz Fourier transform to L1 to the original one. RL on Schwartz is trivial by embedding into the correct space. - [ ] depends on: #35953 - [ ] depends on: #35954 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) WIP large-import 96/29 Mathlib/Analysis/Distribution/SchwartzSpace/Basic.lean,Mathlib/Analysis/Fourier/L1Space.lean,Mathlib/Analysis/Fourier/RiemannLebesgueLemma.lean,Mathlib/Topology/ContinuousMap/ZeroAtInfty.lean 4 3 ['github-actions', 'mathlib-dependent-issues', 'mathlib-merge-conflicts'] nobody
70-44440
2 months ago
97-41650
97 days ago
0-1
1 second
36595 mcdoll
author:mcdoll
 feat(Analysis/TemperedDistribution): polynomially bounded locally integrable functions define tempered distributions --- - [ ] depends on: #36711 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) WIP t-analysis blocked-by-other-PR 137/0 Mathlib/Analysis/Asymptotics/Lemmas.lean,Mathlib/Analysis/Distribution/TemperedDistribution.lean 1 2 ['github-actions', 'mathlib-dependent-issues'] nobody
70-37077
2 months ago
70-37150
70 days ago
0-1
1 second
36529 idontgetoutmuch
author:idontgetoutmuch
 Connection 1 form scribbles Some thoughts on connection 1-forms - not meant to be ever merged but here for convenience of discussion new-contributor t-differential-geometry 496/52 Mathlib/Analysis/ODE/PicardLindelof.lean,Mathlib/Geometry/Manifold/Algebra/FundamentalVectorField.lean,Mathlib/Geometry/Manifold/IntegralCurve/Compact.lean,Mathlib/Geometry/Manifold/IntegralCurve/ExistUnique.lean,Mathlib/Order/Filter/Prod.lean 5 2 ['github-actions'] nobody
70-34400
2 months ago
unknown
0-0
0 seconds
35295 Rida-Hamadani
author:Rida-Hamadani
 feat(SimpleGraph): `dropLast` of a cycle is a path --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-combinatorics awaiting-author 13/0 Mathlib/Combinatorics/SimpleGraph/Paths.lean,Mathlib/Combinatorics/SimpleGraph/Walk/Operations.lean 2 14 ['Rida-Hamadani', 'SnirBroshi', 'YaelDillies', 'github-actions', 'mathlib-merge-conflicts', 'vlad902'] YaelDillies
assignee:YaelDillies
70-25951
2 months ago
43-51432
43 days ago
34-53762
34 days
36327 themathqueen
author:themathqueen
 feat(Analysis/CStarAlgebra/Extreme): a C⋆-algebra is unital iff there exists an extreme point in the closed unit ball Co-authored-by: Jon Bannon <59937998+JonBannon@users.noreply.github.com> Co-authored-by: Jireh Loreaux --- - [x] depends on: #35997 - [x] depends on: #36201 - [x] depends on: #36407 - [x] depends on: #36408 - [x] depends on: #36416 - [x] depends on: #36603 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-analysis awaiting-author merge-conflict blocked-by-other-PR 353/0 Mathlib/Analysis/CStarAlgebra/ApproximateUnit.lean,Mathlib/Analysis/CStarAlgebra/ContinuousFunctionalCalculus/Isometric.lean,Mathlib/Analysis/CStarAlgebra/Extreme.lean,Mathlib/Analysis/CStarAlgebra/GelfandDuality.lean,Mathlib/Topology/ContinuousMap/Bounded/Normed.lean,Mathlib/Topology/ContinuousMap/Compact.lean 11 7 ['github-actions', 'j-loreaux', 'mathlib-dependent-issues', 'mathlib-merge-conflicts', 'themathqueen'] nobody
70-23634
2 months ago
23-66722
23 days ago
0-783
13 minutes
36119 Ruizsolveall
author:Ruizsolveall
 feat(Topology/Covering): fundamental group of the circle is ℤ - Proves that the fundamental group of the circle `π₁(S¹, 0)` is isomorphic to `ℤ`, via covering space theory. - Constructs the winding number map `nLoop : ℤ → Path 0 0` on `AddCircle 1`, and proves it is surjective (`nLoop_surjective`), injective (`nLoop_homotopic_iff`), and additive (`nLoop_add`). - Assembles these into the group isomorphism `windingNumberIso : Multiplicative ℤ ≃* FundamentalGroup (AddCircle 1) 0`. ## Approach Uses the covering map `ℝ → AddCircle 1` and unique path lifting to establish the bijection between homotopy classes of loops and integers (winding numbers). Homotopy invariance of lifted endpoints gives injectivity; surjectivity follows from lifting arbitrary loops. Additivity uses path concatenation of lifts in the simply connected total space `ℝ`. ## AI disclosure I used Claude (Anthropic) to write the PR description, code comments, and to help refine code style. The proof strategy and all Lean code are my own. I understand and can vouch for all the code in this PR. t-topology new-contributor awaiting-author LLM-generated 236/0 Mathlib.lean,Mathlib/Topology/Covering/FundamentalGroupCircle.lean 2 26 ['Ruizsolveall', 'SnirBroshi', 'b-mehta', 'dagurtomas', 'github-actions', 'grunweg', 'vihdzp'] nobody
70-15702
2 months ago
71-8234
71 days ago
8-31258
8 days
31607 grunweg
author:grunweg
 chore: rename `continuous{,On,At,Within}_const` to `ContinuousFoo.const` Zulip discussion: [#mathlib4 > Naming convention @ 💬](https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/Naming.20convention/near/447491526) --- - [x] depends on: #34441 - [x] depends on: #34688 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) delegated merge-conflict awaiting-CI 352/364 Archive/Hairer.lean,Mathlib/Analysis/Analytic/Basic.lean,Mathlib/Analysis/Analytic/Inverse.lean,Mathlib/Analysis/Asymptotics/Lemmas.lean,Mathlib/Analysis/BoxIntegral/Box/Basic.lean,Mathlib/Analysis/BoxIntegral/UnitPartition.lean,Mathlib/Analysis/CStarAlgebra/ContinuousFunctionalCalculus/Continuity.lean,Mathlib/Analysis/CStarAlgebra/ContinuousFunctionalCalculus/Unital.lean,Mathlib/Analysis/Calculus/BumpFunction/FiniteDimension.lean,Mathlib/Analysis/Calculus/BumpFunction/InnerProduct.lean,Mathlib/Analysis/Calculus/DSlope.lean,Mathlib/Analysis/Calculus/Deriv/MeanValue.lean,Mathlib/Analysis/Calculus/DiffContOnCl.lean,Mathlib/Analysis/Calculus/FDeriv/Analytic.lean,Mathlib/Analysis/Calculus/FDeriv/Symmetric.lean,Mathlib/Analysis/Calculus/MeanValue.lean,Mathlib/Analysis/Calculus/Rademacher.lean,Mathlib/Analysis/Calculus/Taylor.lean,Mathlib/Analysis/Complex/AbelLimit.lean,Mathlib/Analysis/Complex/AbsMax.lean,Mathlib/Analysis/Complex/Basic.lean,Mathlib/Analysis/Complex/CauchyIntegral.lean,Mathlib/Analysis/Complex/HalfPlane.lean,Mathlib/Analysis/Complex/LocallyUniformLimit.lean,Mathlib/Analysis/Complex/PhragmenLindelof.lean,Mathlib/Analysis/Complex/RemovableSingularity.lean,Mathlib/Analysis/Complex/UpperHalfPlane/Basic.lean,Mathlib/Analysis/Complex/UpperHalfPlane/Measure.lean,Mathlib/Analysis/Complex/UpperHalfPlane/Metric.lean,Mathlib/Analysis/Complex/UpperHalfPlane/Topology.lean,Mathlib/Analysis/Convex/Cone/InnerDual.lean,Mathlib/Analysis/Convex/Exposed.lean,Mathlib/Analysis/Convex/Gauge.lean,Mathlib/Analysis/Convex/PartitionOfUnity.lean,Mathlib/Analysis/Convex/Side.lean,Mathlib/Analysis/Convex/StdSimplex.lean,Mathlib/Analysis/Convolution.lean,Mathlib/Analysis/InnerProductSpace/Continuous.lean,Mathlib/Analysis/InnerProductSpace/Harmonic/HarmonicContOnCl.lean,Mathlib/Analysis/InnerProductSpace/LinearPMap.lean,Mathlib/Analysis/InnerProductSpace/MeanErgodic.lean,Mathlib/Analysis/InnerProductSpace/OfNorm.lean,Mathlib/Analysis/LocallyConvex/Separation.lean,Mathlib/Analysis/Meromorphic/Order.lean,Mathlib/Analysis/Meromorphic/TrailingCoefficient.lean,Mathlib/Analysis/Normed/Affine/AddTorsor.lean,Mathlib/Analysis/Normed/Group/Continuity.lean,Mathlib/Analysis/Normed/Group/Lemmas.lean,Mathlib/Analysis/Normed/Module/Ball/Homeomorph.lean,Mathlib/Analysis/Normed/Module/Connected.lean,Mathlib/Analysis/Normed/Module/FiniteDimension.lean,Mathlib/Analysis/Normed/Module/Multilinear/Basic.lean,Mathlib/Analysis/Normed/Operator/Completeness.lean,Mathlib/Analysis/ODE/Gronwall.lean,Mathlib/Analysis/ODE/PicardLindelof.lean,Mathlib/Analysis/RCLike/Basic.lean,Mathlib/Analysis/Seminorm.lean,Mathlib/Analysis/SpecialFunctions/Complex/Arg.lean,Mathlib/Analysis/SpecialFunctions/ContinuousFunctionalCalculus/Rpow/Isometric.lean,Mathlib/Analysis/SpecialFunctions/Elliptic/Weierstrass.lean,Mathlib/Analysis/SpecialFunctions/Gamma/Basic.lean,Mathlib/Analysis/SpecialFunctions/Gamma/Deligne.lean,Mathlib/Analysis/SpecialFunctions/Gaussian/GaussianIntegral.lean,Mathlib/Analysis/SpecialFunctions/Gaussian/PoissonSummation.lean,Mathlib/Analysis/SpecialFunctions/Integrability/Basic.lean,Mathlib/Analysis/SpecialFunctions/Integrals/Basic.lean,Mathlib/Analysis/SpecialFunctions/MulExpNegMulSq.lean,Mathlib/Analysis/SpecialFunctions/PolarCoord.lean,Mathlib/Analysis/SpecialFunctions/Pow/Continuity.lean,Mathlib/Analysis/SpecialFunctions/Pow/Deriv.lean,Mathlib/Analysis/SpecialFunctions/Trigonometric/Basic.lean,Mathlib/Analysis/SpecialFunctions/Trigonometric/Inverse.lean,Mathlib/Computability/AkraBazzi/SumTransform.lean,Mathlib/Condensed/Light/TopCatAdjunction.lean,Mathlib/Condensed/TopCatAdjunction.lean,Mathlib/Dynamics/OmegaLimit.lean,Mathlib/Geometry/Euclidean/Angle/Oriented/Basic.lean,Mathlib/Geometry/Manifold/Bordism.lean,Mathlib/Geometry/Manifold/Complex.lean,Mathlib/Geometry/Manifold/Instances/Icc.lean,Mathlib/Geometry/Manifold/Instances/Real.lean,Mathlib/Geometry/Manifold/SmoothApprox.lean,Mathlib/MeasureTheory/Function/SpecialFunctions/Basic.lean,Mathlib/MeasureTheory/Integral/Bochner/Basic.lean,Mathlib/MeasureTheory/Integral/CircleIntegral.lean,Mathlib/MeasureTheory/Integral/CircleTransform.lean,Mathlib/MeasureTheory/Integral/DominatedConvergence.lean,Mathlib/MeasureTheory/Integral/IntervalIntegral/Basic.lean,Mathlib/MeasureTheory/Integral/IntervalIntegral/FundThmCalculus.lean,Mathlib/MeasureTheory/Integral/RieszMarkovKakutani/Real.lean,Mathlib/MeasureTheory/Measure/LevyProkhorovMetric.lean,Mathlib/MeasureTheory/Measure/Stieltjes.lean,Mathlib/NumberTheory/Cyclotomic/CyclotomicCharacter.lean,Mathlib/NumberTheory/Harmonic/ZetaAsymp.lean,Mathlib/NumberTheory/LSeries/AbstractFuncEq.lean,Mathlib/NumberTheory/LSeries/Deriv.lean,Mathlib/NumberTheory/LSeries/Dirichlet.lean,Mathlib/NumberTheory/LSeries/DirichletContinuation.lean,Mathlib/NumberTheory/LSeries/HurwitzZetaOdd.lean,Mathlib/NumberTheory/LSeries/PrimesInAP.lean 180 15 ['github-actions', 'j-loreaux', 'mathlib-bors', 'mathlib-merge-conflicts', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
70-5141
2 months ago
189-84396
189 days ago
0-1
1 second
36347 FrankieeW
author:FrankieeW
 feat(NumberTheory/QuadraticField): define quadratic number fields as QuadraticAlgebra ℚ d 0 Define `Qsqrtd d` as `QuadraticAlgebra ℚ d 0`, representing the quadratic number field `ℚ(√d)`. Prove trace and norm results, show `Qsqrtd d` is a number field and a quadratic extension when `d` is not a perfect square, and prove that `ℚ(√0)` and `ℚ(√1)` are not fields. Include `IsQuadraticField` as a predicate for quadratic extensions of `ℚ`, and bridge lemmas connecting squarefree integer parameters to the non-square condition. This PR is part of a series upstreaming the [QuadraticNumberFields](https://github.com/FrankieeW/QuadraticNumberFields) project. [Zulip discussion](https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/quadratic.20number.20fields) --- ### PRs - #36347 （this PR） - #36387 --- t-number-theory new-contributor large-import awaiting-author LLM-generated 191/0 Mathlib.lean,Mathlib/Algebra/QuadraticAlgebra/Defs.lean,Mathlib/Algebra/Squarefree/Basic.lean,Mathlib/NumberTheory/QuadraticField/Basic.lean 4 29 ['FrankieeW', 'eric-wieser', 'github-actions', 'riccardobrasca', 'tb65536', 'wwylele'] tb65536
assignee:tb65536
69-75769
2 months ago
67-25764
67 days ago
7-9258
7 days
36626 SnirBroshi
author:SnirBroshi
 feat(Order/UpperLower/Basic): an injective function constrained by the identity function using a well-order is the identity --- (yes I know `IsLowerSet` is bundled but I need the theorems for unbundled relations 🙈) [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-order awaiting-author 30/0 Mathlib/Order/UpperLower/Basic.lean 1 6 ['SnirBroshi', 'YaelDillies', 'github-actions', 'vihdzp'] bryangingechen
assignee:bryangingechen
69-70166
2 months ago
25-37951
25 days ago
44-37808
44 days
36619 ldct
author:ldct
 feat: add `NonUnitalRingHom.ker` --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-ring-theory 18/4 Mathlib/RingTheory/Ideal/Maps.lean 1 1 ['github-actions'] nobody
69-46406
2 months ago
unknown
0-0
0 seconds
35651 sun123zxy
author:sun123zxy
 feat(Mathlib/RingTheory/Ideal/Cotangent): `Submodule.map` definition of cotangent spaces This PR adds an alternative definition of the cotangent space as an image under the R-module quotient map. --- Split from PR #33247 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-ring-theory new-contributor awaiting-author 47/20 Mathlib/RingTheory/Ideal/Cotangent.lean,Mathlib/RingTheory/Ideal/Quotient/Operations.lean 2 20 ['chrisflav', 'erdOne', 'github-actions', 'mathlib-merge-conflicts', 'sun123zxy'] chrisflav
assignee:chrisflav
69-32813
2 months ago
67-14512
67 days ago
16-12398
16 days
36616 EtienneC30
author:EtienneC30
 feat: add predicates IsPreBrownian and IsBrownian The predicate `IsPreBrownian X P` means that, under the probability measure `P`, the finite dimensional laws of the stochastic process `X` are those of the Brownian motion, given by `gaussianProjectiveFamily`. The predicate `IsBrownian X P` means that `X` is pre-Brownian and has almost-surely continuous paths. We prove that a centered Gaussian process with the right covariances is pre-Brownian, as well as basic invariance properties. We also prove that any pre-Brownian motion satisfies the weak Markov property. --- - [ ] depends on: #36472 - [x] depends on: #36615 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) blocked-by-other-PR brownian t-measure-probability large-import 796/1 Mathlib.lean,Mathlib/MeasureTheory/Function/L2Space.lean,Mathlib/Probability/BrownianMotion/Basic.lean,Mathlib/Probability/BrownianMotion/GaussianProjectiveFamily.lean,Mathlib/Probability/Distributions/Gaussian/HasGaussianLaw/Basic.lean,Mathlib/Probability/Distributions/Gaussian/Real.lean,Mathlib/Probability/HasLaw.lean,Mathlib/Probability/Moments/Basic.lean 9 4 ['github-actions', 'mathlib-dependent-issues', 'mathlib-merge-conflicts'] nobody
69-28534
2 months ago
70-7793
70 days ago
0-1
1 second
34911 smmercuri
author:smmercuri
 feat: idelic product formula --- - [x] depends on: #34915 - [x] depends on: #34918 - [x] depends on: #36184 - [x] depends on: #36204 - [ ] depends on: #36275 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) blocked-by-other-PR merge-conflict 262/2 Mathlib.lean,Mathlib/Algebra/Group/Submonoid/Units.lean,Mathlib/NumberTheory/NumberField/AdeleRing.lean,Mathlib/NumberTheory/NumberField/Completion/FinitePlace.lean,Mathlib/NumberTheory/NumberField/FiniteAdeleRing.lean,Mathlib/RingTheory/DedekindDomain/FiniteAdeleRing.lean,Mathlib/Topology/Algebra/Valued/NormedValued.lean 8 7 ['github-actions', 'mathlib-dependent-issues', 'mathlib-merge-conflicts'] nobody
69-21856
2 months ago
105-38532
105 days ago
0-10
10 seconds
16801 awainverse
author:awainverse
 feat(ModelTheory/Equivalence): The quotient type of formulas modulo a theory Defines `FirstOrder.Language.Theory.Formula`: `T.Formula α` is the quotient of `L.Formula α` by equivalence modulo a theory `T`. Puts a boolean algebra instance on `T.Formula α`, with `≤` corresponding to implication. --- - [x] depends on: #16799 - [x] depends on: #16800 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict awaiting-author t-logic 174/60 Mathlib/ModelTheory/Complexity.lean,Mathlib/ModelTheory/Equivalence.lean,Mathlib/ModelTheory/Types.lean 3 30 ['YaelDillies', 'awainverse', 'github-actions', 'leanprover-community-bot-assistant', 'mathlib4-dependent-issues-bot', 'metinersin'] nobody
69-19892
2 months ago
567-40523
567 days ago
29-26213
29 days
22314 shetzl
author:shetzl
 feat: add leftmost derivations for context-free grammars Leftmost derivations are often easier to reason about than arbitrary derivations. This PR adds leftmost variants of Rewrites, Produces and Derives to the existing definition of context-free grammars and proves that a string of terminals can be derived iff it can be leftmost derived. Co-authored-by: Tobias Leichtfried --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-computability awaiting-author new-contributor 383/0 Mathlib.lean,Mathlib/Computability/LeftmostDerivation.lean 2 55 ['YaelDillies', 'github-actions', 'madvorak', 'mathlib4-merge-conflict-bot', 'shetzl'] nobody
69-19868
2 months ago
378-43164
378 days ago
72-2714
72 days
26368 Whysoserioushah
author:Whysoserioushah
 feat(RingTheory/TwoSidedIdeal/SpanAsSum): span of set as finsum Co-authored-by: Jujian Zhang --- Reopened after everything moved to fork (#23320). [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict awaiting-author t-ring-theory 81/0 Mathlib.lean,Mathlib/RingTheory/TwoSidedIdeal/SpanAsSum.lean 2 7 ['github-actions', 'kckennylau', 'mathlib4-merge-conflict-bot'] nobody
69-19839
2 months ago
294-56973
294 days ago
36-16237
36 days
27534 PierreQuinton
author:PierreQuinton
 feat: a typeclass for `sSup`/`sInf` to be lawful Adds lawful infima and suprema type classes. A preorder with lawful suprema: whenever a set has a least upper bound, `sSup` returns a least upper bound for that set. A preorder with lawful infima: whenever a set has a greatest lower bound, `sInf` returns a greastest lower bound for that set. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-order 121/8 Mathlib.lean,Mathlib/Order/CompleteLattice/Defs.lean,Mathlib/Order/LawfulSupInf.lean 3 26 ['PierreQuinton', 'YaelDillies', 'github-actions', 'mathlib4-merge-conflict-bot', 'plp127', 'vihdzp'] nobody
69-19813
2 months ago
184-50888
184 days ago
114-37921
114 days
28151 iehality
author:iehality
 feat(Computability): r.e. sets are closed under inter/union/projection/composition Prove that r.e. sets are closed under intersections, unions, projection and composition. --- This PR continues the work from #16705. Original PR: https://github.com/leanprover-community/mathlib4/pull/16705 merge-conflict t-computability awaiting-author 120/0 Mathlib/Computability/Halting.lean 1 13 ['YaelDillies', 'github-actions', 'iehality', 'mathlib4-merge-conflict-bot'] nobody
69-19801
2 months ago
276-41825
276 days ago
7-84521
7 days
31610 rudynicolop
author:rudynicolop
 feat(Computability/NFA): Kleene star closure for Regular Languages via NFA This PR constructs a Kleene star closure for non-epsilon NFAs, and proves that regular languages are closed under Kleene star. The NFA construction is `NFA.kstar`. The main theorems are: - `NFA.accepts_kstar`: demonstrates that `M.kstar` accepts the Kleene star closure of the language of `M`. - `IsRegular.kstar`: demonstrates that regular languages are closed under Kleene star. There is an onging zulip discussion about regular languages in Mathlib: https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/Regular.20languages.3A.20the.20review.20queue/with/553759136 This discussion is also tracked at #24205. Furthermore, the construction and proofs in this PR are heavily inspired by @TpmKranz from his #15651. #15651 supersedes this PR, so if it is accepted then this PR is not needed. --- - [x] depends on: #31038 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-computability new-contributor awaiting-author awaiting-CI 405/7 Mathlib/Computability/NFA.lean 1 16 ['YaelDillies', 'ctchou', 'github-actions', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
69-19767
2 months ago
128-12149
128 days ago
43-77831
43 days
36716 mcdoll
author:mcdoll
 chore(Analysis/SchwartzSpace): golf a proof --- - [ ] depends on: #36711 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) WIP t-analysis blocked-by-other-PR 45/17 Mathlib/Analysis/Distribution/SchwartzSpace/Basic.lean,Mathlib/Analysis/Seminorm.lean 2 2 ['github-actions', 'mathlib-dependent-issues'] nobody
67-41223
2 months ago
unknown
0-0
0 seconds
36757 alok
author:alok
 feat(Order/Filter): add Filter.IsFree and Filter.IsNonprincipal ## Summary Adds two filter predicates and their basic API: - **`Filter.IsFree`**: no point belongs to every set (`f.ker = ∅`), equivalently `f ≤ cofinite` - **`Filter.IsNonprincipal`**: not equal to `𝓟 s` for any set `s` Every free `NeBot` filter is non-principal (`IsFree.isNonprincipal`), but the converse fails for general filters (e.g. `𝓝 x` in a non-discrete T₁ space is non-principal but not free). For ultrafilters the two notions coincide (`Ultrafilter.isNonprincipal_iff_isFree`). On finite types, no `NeBot` filter is free (`not_isFree_of_neBot`). ## Test plan - [x] `lake build Mathlib.Order.Filter.Cofinite` passes - [x] `lake build Mathlib.Order.Filter.Ultrafilter.Basic` passes 🤖 Generated with [Claude Code](https://claude.com/claude-code) t-order new-contributor 98/1 Mathlib/Order/Filter/Cofinite.lean,Mathlib/Order/Filter/Ultrafilter/Basic.lean 2 2 ['github-actions'] nobody
66-66438
2 months ago
66-65038
66 days ago
0-3928
1 hour
36404 smmercuri
author:smmercuri
 feat: the adele ring of a number field is locally compact --- - [ ] depends on: #30579 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) blocked-by-other-PR large-import merge-conflict 539/113 Mathlib.lean,Mathlib/Algebra/GroupWithZero/Range.lean,Mathlib/NumberTheory/NumberField/AdeleRing.lean,Mathlib/NumberTheory/NumberField/Completion/FinitePlace.lean,Mathlib/NumberTheory/NumberField/LiesOverInstances.lean,Mathlib/NumberTheory/NumberField/ProductFormula.lean,Mathlib/NumberTheory/RamificationInertia/Valuation.lean,Mathlib/RingTheory/DedekindDomain/AdicValuation.lean,Mathlib/RingTheory/Valuation/Extension.lean,Mathlib/Topology/Algebra/Valued/WithVal.lean 10 6 ['github-actions', 'mathlib-dependent-issues', 'mathlib-merge-conflicts'] nobody
62-48313
2 months ago
74-15463
74 days ago
0-264
4 minutes
26221 grunweg
author:grunweg
 Mr. Covariant Derivatives This PR is a work in progress, and will land in individual pieces. Some contributions include - additional API for differentiability of vector bundle sections - finite sums, differences and scalar products of smooth sections are smooth - the same result for mdifferentiable - add missing mdifferentiable congruence lemmas - define smooth local frames of a vector bundle - a general tensoriality criterion - define covariant derivatives, proving their tensoriality and that convex combinations of these are covariant derivatives - the classification of covariant derivatives over a trivial bundle - additional API for the Lie bracket of vector fields: the product rule (one sorry left!), Lie bracket at zero vanishes - torsion of a connection, torsion-free connections - Gram-Schmidt procedure for sections of a Riemannian vector bundle - orthonormal frames on a Riemannian vector bundle - connections compatible with a metric; definition of the Levi-Civita connection - uniqueness of the Levi-Civita connection - Christoffel symbols - in progress: existence of the Levi-Civita connection (connection done; torsion-freeness and compatibility in progress) - custom elaborators for sections in a vector bundle (converting dependent to non-dependent functions) - custom elaborators for inferring a model with corners, in differentiability/smoothness definitions - a `#check'` command and tactic which only shows explicit arguments More to come soon! Joint work with @PatrickMassot; supported by the FMJH. --- - [x] depends on: #26360 - [x] depends on: #26672 - [x] depends on: #26673 - [x] depends on: #26674 - [x] depends on: #26864 (more of a by-product) - [x] depends on: #26865 - [x] depends on: #26866 - [x] depends on: #26870 - [x] depends on: #26871 - [x] depends on: #26671 - [x] depends on: #26676 - [x] depends on: #26677 - [x] depends on: #26678 - [x] depends on: #26686 - [x] depends on: #26687 - [x] depends on: #26688 - [x] depends on: #26702 - [x] depends on: #26709 - [x] depends on: #26734 - [ ] depends on: #26743 - [x] depends on: #26894 - [x] depends on: #26921 - [x] depends on: #26922 - [x] depends on: #27020 - [x] depends on: #27021 - [x] depends on: #30307 - [x] depends on: #27023 - [ ] depends on: #27024 - [ ] depends on: #27025 - [x] depends on: #30338 - [ ] depends on: #30083 - [ ] depends on: #30339 - [ ] depends on: #31194 - [ ] depends on: #34262 - [ ] depends on: #34263 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-differential-geometry blocked-by-other-PR merge-conflict 5847/155 Mathlib.lean,Mathlib/Geometry/Manifold/CheatSheet.md,Mathlib/Geometry/Manifold/Riemannian/ExistsRiemannianMetric.lean,Mathlib/Geometry/Manifold/VectorBundle/Basic.lean,Mathlib/Geometry/Manifold/VectorBundle/CovariantDerivative/Basic.lean,Mathlib/Geometry/Manifold/VectorBundle/CovariantDerivative/LeviCivita.lean,Mathlib/Geometry/Manifold/VectorBundle/CovariantDerivative/Lift.lean,Mathlib/Geometry/Manifold/VectorBundle/CovariantDerivative/Prelim.lean,Mathlib/Geometry/Manifold/VectorBundle/CovariantDerivative/Torsion.lean,Mathlib/Geometry/Manifold/VectorBundle/GramSchmidtOrtho.lean,Mathlib/Geometry/Manifold/VectorBundle/LocalFrame.lean,Mathlib/Geometry/Manifold/VectorBundle/MDifferentiable.lean,Mathlib/Geometry/Manifold/VectorBundle/Misc.lean,Mathlib/Geometry/Manifold/VectorBundle/OrthonormalFrame.lean,Mathlib/Geometry/Manifold/VectorBundle/SmoothSection.lean,Mathlib/Geometry/Manifold/VectorBundle/Tensoriality.lean,Mathlib/Geometry/Manifold/VectorField/LieBracket.lean,Mathlib/Geometry/Manifold/VectorField/Pullback.lean 18 15 ['github-actions', 'grunweg', 'idontgetoutmuch', 'leanprover-community-bot-assistant', 'mathlib-merge-conflicts', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
62-41731
2 months ago
unknown
0-0
0 seconds
36825 danlyng
author:danlyng
 feat(MeasureTheory/Integral/IntegralEqImproper): add Iic variants of nonneg/nonpos derivative integrability and FTC-2 Add the `Iic` counterparts of the existing `Ioi` results for automatic integrability of derivatives on semi-infinite intervals and the corresponding corollaries computing the integral value. Additionally, apply minor fixes to existing docstrings. New declarations: - `integrableOn_Iic_deriv_of_nonneg` / `integrableOn_Iic_deriv_of_nonneg'` - `integrableOn_Iic_deriv_of_nonpos` / `integrableOn_Iic_deriv_of_nonpos'` - `integral_Iic_of_hasDerivAt_of_nonneg` / `integral_Iic_of_hasDerivAt_of_nonneg'` - `integral_Iic_of_hasDerivAt_of_nonpos` / `integral_Iic_of_hasDerivAt_of_nonpos'` These mirror `integrableOn_Ioi_deriv_of_nonneg`, `integrableOn_Ioi_deriv_of_nonpos`, `integral_Ioi_of_hasDerivAt_of_nonneg`, `integral_Ioi_of_hasDerivAt_of_nonpos` and their primed variants. t-measure-probability new-contributor awaiting-author 107/9 Mathlib/MeasureTheory/Integral/IntegralEqImproper.lean 1 7 ['EtienneC30', 'github-actions'] EtienneC30
assignee:EtienneC30
62-30168
2 months ago
62-30168
62 days ago
2-67942
2 days
36973 JovanGerb
author:JovanGerb
 chore(Order/Filter/AtTopBot/Map): use `to_dual` This PR uses `to_dual` on 4 declarations. `comap_atTop` is problematic, because the heuristic fails, and mistakenly thinks that it should translate `Surjective.iInf_comp`. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-order 5/20 Mathlib/Order/Filter/AtTopBot/Map.lean 1 2 ['github-actions', 'mathlib-bors'] nobody
61-68595
2 months ago
61-68669
61 days ago
0-7
7 seconds
36890 vihdzp
author:vihdzp
 chore(SetTheory): `le_mul_left` → `le_mul_of_pos_left` The new theorem names/statements match [`Nat.le_mul_of_pos_left`](https://leanprover-community.github.io/mathlib4_docs/Init/Data/Nat/Lemmas.html#Nat.le_mul_of_pos_left). The cardinal one has also been moved to an earlier file. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-set-theory awaiting-zulip merge-conflict 28/23 Mathlib/SetTheory/Cardinal/Arithmetic.lean,Mathlib/SetTheory/Cardinal/Basic.lean,Mathlib/SetTheory/Cardinal/Free.lean,Mathlib/SetTheory/Ordinal/Arithmetic.lean,Mathlib/SetTheory/Ordinal/Exponential.lean,Mathlib/SetTheory/Ordinal/Notation.lean 6 2 ['github-actions', 'mathlib-merge-conflicts'] nobody
60-55309
1 month ago
63-42049
63 days ago
0-10825
3 hours
36719 NoneMore
author:NoneMore
 feat(ModelTheory): add `PartialType` for first-order theories This PR adds the definitions of partial types over theories and over parameter sets, and proves several equivalent characterizations. --- - [ ] depends on: #36667 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) blocked-by-other-PR t-logic new-contributor 468/0 Mathlib.lean,Mathlib/ModelTheory/PartialTypes.lean,Mathlib/ModelTheory/Semantics.lean,Mathlib/ModelTheory/Syntax.lean 4 5 ['NoneMore', 'github-actions', 'mathlib-dependent-issues', 'vihdzp'] nobody
58-49043
1 month ago
67-48397
67 days ago
0-322
5 minutes
36711 mcdoll
author:mcdoll
 feat(Algebra): Bound `Finset.sum` in terms of `Finset.sup` We add a version for `Finset` and for seminorms (with the additional `sum_apply` lemma). --- I am not sure where to put the `Finset` lemma, `#find_home` was useless and there seems to be no natural candidate. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra awaiting-author
label:t-algebra$
 34/0 Mathlib/Algebra/Module/BigOperators.lean,Mathlib/Analysis/Seminorm.lean 2 2 ['dagurtomas', 'github-actions'] dagurtomas
assignee:dagurtomas
57-4291
1 month ago
57-4291
57 days ago
10-38227
10 days
37232 mathlib-splicebot
author:mathlib-splicebot
 chore(Algebra/Order): bound on `|n / m|ₘ` and `|n - m|` This PR was automatically created from PR #34722 by @GrigorenkoPV via a [review comment](https://github.com/leanprover-community/mathlib4/pull/34722#discussion_r2996870566) by @Vierkantor. t-algebra delegated
label:t-algebra$
 5/0 Mathlib/Algebra/Order/Group/Unbundled/Abs.lean 1 6 ['Vierkantor', 'bryangingechen', 'github-actions', 'mathlib-bors'] nobody
57-70
1 month ago
57-12503
57 days ago
0-588
9 minutes
33295 AntoineChambert-Loir
author:AntoineChambert-Loir
 feat(Algebra/Central/End): center of the group of automorphisms of a free module Let `R` be a ring and let `V` be a free `R`-module. We describe the center of the group of linear automorphisms of `V`. The group of linear automorphisms can be summoned either as `V ≃ₗ[R] V`, or as `LinearMap.GeneralLinearGroup R V`, which is a shortcut for `(V →ₗ[R] V)ˣ`. We provide both descriptions. There are three possibilities: * If `V` is trivial, then `V ≃ₗ[R] V` is trivial, and so is its center. * If `V` has rank one, then any basis with a `Unique` type of index furnishes a ring equivalence from `V →ₗ[R] V` with `Rᵐᵒᵖ`, given by right-multiplication on coordinates in the given basis. (This equivalence depends on the choice of a basis.) Then `V ≃ₗ[R] V` is mul-equivalent with `(Rᵐᵒᵖ)ˣ`, hence its center is isomorphic with `Subgroup.center (Rᵐᵒᵖ)ˣ`, or, by commutativity, with `Subgroup.center Rˣ`. * Otherwise, the center of `V ≃ₗ[R] V` consists of homotheties with central ratio, furnishing a group isomorphism from `Subgroup.center (V ≃ₗ[R] V)` with `(Subgroup.center R)ˣ`. When `R` is commutative and `V` is nontrivial, the last two cases give the same answer and the center of `V ≃ₗ[R] V` is isomorphic with `Rˣ`. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra WIP merge-conflict
label:t-algebra$
 364/0 Mathlib.lean,Mathlib/LinearAlgebra/Center.lean,Mathlib/LinearAlgebra/GeneralLinearGroup/Center.lean 3 4 ['github-actions', 'mathlib-merge-conflicts', 'mathlib4-merge-conflict-bot'] nobody
56-69212
1 month ago
147-12480
147 days ago
0-19130
5 hours
36769 jjdishere
author:jjdishere
 feat(Valued/ValuationTopology): creating instances of `IsValuativeTopology` This is the third in a series of PRs, with the final goal of removing the class `Valued` from Mathlib. A `Valued` instance will be replaced by `[ValuativeRel R] [UniformSpace R] [IsValuativeTopology R] [IsUniformAddGroup R] (v : Valuation R A) [v.Compatible]`. The goal of this PR is to prepare APIs for creating `ValuativeRel`, `IsValuativeTopology`, ... instances whenever a `Valued` instance was created. Currently in Mathlib, there are three main ways of creating a `Valued` instance: 1. `Valued.mk'` (`ValuativeRel.ofValuation` already in mathlib, ValuativeRel.uniformSpace in #36532) 2. `Valued.valuedCompletion` 3. `NormedField.toValued` For the later two methods, we create corresponding APIs to equip `IsValuativeTopology` under the original input. Some uniform space structures induced by `ValuativeRel` in this PR cannot be made into instances immediately, since they would cause diamonds with `Valued`. However, they will become instances in the final PR removing `Valued`. ## More about the whole refactor plan: 1. Copy APIs that take `Valued` as input and make them accept input `[ValuativeRel R] [UniformSpace R] [IsValuativeTopology R] [IsUniformAddGroup R] (v : Valuation R A) [v.Compatible]`. - [x] #36532 2. For every API that introduces a `Valued` instance, copy that API and make it create `[ValuativeRel R] [UniformSpace R] [IsValuativeTopology R] [IsUniformAddGroup R]` instances. And for every instance that currently exists in Mathlib, create the above series of instances as much as possible without introducing diamonds. More specifically, currently in Mathlib, there are three main ways of creating a `Valued` instance: - `Valued.mk'` - `Valued.valuedCompletion` - `NormedField.toValued` For each of these we create APIs to create the above series of instances. - [ ] #36777 [Generalize the definition of `IsValuativeTopology` to non comm rings] - [ ] This PR. For each of these we create APIs to create the above series of instances. 3. A big PR deprecating the `Valued` class using 1 and 2. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) - [x] depends on: #36532 - [ ] depends on : #36777 - [ ] depends on : #36911 t-topology WIP t-algebra t-ring-theory merge-conflict
label:t-algebra$
 752/492 Mathlib/Algebra/GroupWithZero/Range.lean,Mathlib/Data/NNReal/Defs.lean,Mathlib/NumberTheory/NumberField/Completion/FinitePlace.lean,Mathlib/NumberTheory/Padics/Complex.lean,Mathlib/NumberTheory/Padics/HeightOneSpectrum.lean,Mathlib/NumberTheory/Padics/WithVal.lean,Mathlib/NumberTheory/RatFunc/Ostrowski.lean,Mathlib/RingTheory/DedekindDomain/AdicValuation.lean,Mathlib/RingTheory/LaurentSeries.lean,Mathlib/RingTheory/Valuation/Basic.lean,Mathlib/RingTheory/Valuation/Discrete/Basic.lean,Mathlib/RingTheory/Valuation/Discrete/RankOne.lean,Mathlib/RingTheory/Valuation/DiscreteValuativeRel.lean,Mathlib/RingTheory/Valuation/RankOne.lean,Mathlib/RingTheory/Valuation/ValuativeRel/Basic.lean,Mathlib/RingTheory/Valuation/ValuativeRel/Trivial.lean,Mathlib/Topology/Algebra/ValuativeRel/Completion.lean,Mathlib/Topology/Algebra/ValuativeRel/ValuativeTopology.lean,Mathlib/Topology/Algebra/Valued/LocallyCompact.lean,Mathlib/Topology/Algebra/Valued/NormedValued.lean,Mathlib/Topology/Algebra/Valued/ValuationTopology.lean,Mathlib/Topology/Algebra/Valued/ValuativeRel.lean,Mathlib/Topology/Algebra/Valued/ValuedField.lean,Mathlib/Topology/Algebra/Valued/WithVal.lean,Mathlib/Topology/Algebra/Valued/WithZeroMulInt.lean 25 3 ['github-actions', 'mathlib-dependent-issues', 'mathlib-merge-conflicts'] nobody
56-65774
1 month ago
66-27711
66 days ago
0-56
56 seconds
36911 jjdishere
author:jjdishere
 fix(RingTheory/Valuation): change `ValueGroup` from taking HomClass to Hom This PR refactors `MonoidWithZeroHom.valueMonoid`, `MonoidWithZeroHom.valueGroup`, `MonoidWithZeroHom.ValueGroup₀`, and `MonoidWithZeroHom.ValueGroup₀.embedding` to take a concrete `MonoidWithZeroHom` as input instead of a `MonoidWithZeroHomClass` instance, following rules described in [#mathlib4 > Mathlib's morphism hierarchy @ 💬](https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/Mathlib.27s.20morphism.20hierarchy/near/554383157) As a result, we are able to remove several `erw` and many `set_option backward.isDefEq.respectTransparency false in`. The trade-off (foreseen by the same zulip thread) is that we now need to write an explicit coercion to `MonoidWithZeroHom` in `ValueGroup₀ (Valued.v (R := R) : R →*₀ Γ₀)`. Additionally, this PR fixes an instance on `NNReal`. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) - [x] depends on: #36532 - [ ] depends on: #36777 t-ring-theory tech debt blocked-by-other-PR merge-conflict 559/483 Mathlib/Algebra/GroupWithZero/Range.lean,Mathlib/Data/NNReal/Defs.lean,Mathlib/NumberTheory/NumberField/Completion/FinitePlace.lean,Mathlib/NumberTheory/Padics/Complex.lean,Mathlib/NumberTheory/Padics/HeightOneSpectrum.lean,Mathlib/NumberTheory/Padics/WithVal.lean,Mathlib/NumberTheory/RatFunc/Ostrowski.lean,Mathlib/RingTheory/DedekindDomain/AdicValuation.lean,Mathlib/RingTheory/LaurentSeries.lean,Mathlib/RingTheory/Valuation/Basic.lean,Mathlib/RingTheory/Valuation/Discrete/Basic.lean,Mathlib/RingTheory/Valuation/Discrete/RankOne.lean,Mathlib/RingTheory/Valuation/DiscreteValuativeRel.lean,Mathlib/RingTheory/Valuation/RankOne.lean,Mathlib/RingTheory/Valuation/ValuativeRel/Basic.lean,Mathlib/RingTheory/Valuation/ValuativeRel/Trivial.lean,Mathlib/Topology/Algebra/ValuativeRel/ValuativeTopology.lean,Mathlib/Topology/Algebra/Valued/LocallyCompact.lean,Mathlib/Topology/Algebra/Valued/NormedValued.lean,Mathlib/Topology/Algebra/Valued/ValuationTopology.lean,Mathlib/Topology/Algebra/Valued/ValuativeRel.lean,Mathlib/Topology/Algebra/Valued/ValuedField.lean,Mathlib/Topology/Algebra/Valued/WithVal.lean,Mathlib/Topology/Algebra/Valued/WithZeroMulInt.lean 24 3 ['github-actions', 'mathlib-dependent-issues', 'mathlib-merge-conflicts'] nobody
56-65767
1 month ago
63-11234
63 days ago
0-60
1 minute
37184 dagurtomas
author:dagurtomas
 feat(CategoryTheory): start using the map attribute --- - [ ] depends on: #37183 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) WIP blocked-by-other-PR 259/41 Mathlib.lean,Mathlib/Algebra/Category/ModuleCat/Presheaf.lean,Mathlib/CategoryTheory/Iso.lean,Mathlib/CategoryTheory/Localization/Monoidal/Functor.lean,Mathlib/CategoryTheory/Monoidal/DayConvolution.lean,Mathlib/CategoryTheory/Monoidal/DayConvolution/Braided.lean,Mathlib/CategoryTheory/Monoidal/Functor.lean,Mathlib/CategoryTheory/Monoidal/NaturalTransformation.lean,Mathlib/CategoryTheory/Sites/Descent/DescentData.lean,Mathlib/CategoryTheory/Sites/Descent/DescentDataPrime.lean,Mathlib/Tactic.lean,Mathlib/Tactic/CategoryTheory/Map.lean,MathlibTest/CategoryTheory/Map.lean 13 2 ['github-actions', 'mathlib-dependent-issues'] nobody
56-23829
1 month ago
57-84342
57 days ago
0-1
1 second
37275 dagurtomas
author:dagurtomas
 chore(CategoryTheory): use the map attribute more --- - [ ] depends on: #37184 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) WIP blocked-by-other-PR 283/77 Mathlib.lean,Mathlib/Algebra/Category/ModuleCat/Presheaf.lean,Mathlib/Algebra/Category/ModuleCat/Sheaf/Free.lean,Mathlib/Algebra/Category/ModuleCat/Sheaf/PullbackFree.lean,Mathlib/Algebra/Homology/DerivedCategory/ShortExact.lean,Mathlib/Algebra/Homology/HomotopyCategory.lean,Mathlib/Algebra/Homology/HomotopyCategory/Pretriangulated.lean,Mathlib/Algebra/Homology/HomotopyCategory/ShortExact.lean,Mathlib/Algebra/Homology/ShortComplex/Basic.lean,Mathlib/CategoryTheory/Functor/Category.lean,Mathlib/CategoryTheory/Functor/Trifunctor.lean,Mathlib/CategoryTheory/Iso.lean,Mathlib/CategoryTheory/Localization/Monoidal/Functor.lean,Mathlib/CategoryTheory/Monoidal/DayConvolution.lean,Mathlib/CategoryTheory/Monoidal/DayConvolution/Braided.lean,Mathlib/CategoryTheory/Monoidal/Functor.lean,Mathlib/CategoryTheory/Monoidal/NaturalTransformation.lean,Mathlib/CategoryTheory/NatTrans.lean,Mathlib/CategoryTheory/Sites/Descent/DescentData.lean,Mathlib/CategoryTheory/Sites/Descent/DescentDataPrime.lean,Mathlib/CategoryTheory/Triangulated/Basic.lean,Mathlib/Tactic.lean,Mathlib/Tactic/CategoryTheory/Map.lean,MathlibTest/CategoryTheory/Map.lean 24 2 ['github-actions', 'mathlib-dependent-issues'] nobody
56-20747
1 month ago
56-21247
56 days ago
0-1
1 second
32295 jsm28
author:jsm28
 feat(Archive/Imo/Imo2024Q4): IMO 2024 Q4 Add a formalization of IMO 2024 problem 4, so completing the formalizations of all six IMO 2024 problems. --- - [ ] depends on: #30981 - [ ] depends on: #30982 - [ ] depends on: #31057 - [ ] depends on: #31205 - [ ] depends on: #31452 - [ ] depends on: #31495 - [ ] depends on: #31733 - [ ] depends on: #31891 - [ ] depends on: #31892 - [ ] depends on: #31893 - [ ] depends on: #31979 - [ ] depends on: #31981 - [ ] depends on: #32004 - [ ] depends on: #32019 - [ ] depends on: #32021 - [ ] depends on: #32023 - [ ] depends on: #32259 - [ ] depends on: #32260 - [ ] depends on: #32270 - [ ] depends on: #32273 - [ ] depends on: #32278 - [ ] depends on: #32282 - [ ] depends on: #32290 - [ ] depends on: #32294 - [ ] depends on: #32296 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) IMO blocked-by-other-PR 1195/2 Archive.lean,Archive/Imo/Imo2024Q4.lean,Mathlib.lean,Mathlib/Geometry/Euclidean/Angle/Incenter.lean,Mathlib/Geometry/Euclidean/Incenter.lean,Mathlib/Geometry/Euclidean/Sphere/PolePolar.lean,Mathlib/Geometry/Euclidean/Sphere/Tangent.lean 7 7 ['github-actions', 'mathlib-merge-conflicts', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
56-13345
1 month ago
172-78513
172 days ago
0-2910
48 minutes
36706 kim-em
author:kim-em
 feat(Tactic/FastInstance): warn when a synthesized sub-instance has leaky binder types This PR adds a warning to `fast_instance%` and `inferInstanceAs%` when they encounter a synthesized sub-instance that has leaky data-field binder types. When `fast_instance%` recursively normalizes a class instance, it uses `trySynthInstance` to find canonical sub-instances. If a found sub-instance is not canonical at instances transparency (i.e., its internal lambda binder types reference an unexpanded type alias instead of the target carrier), the tool now emits a warning: ``` fast_instance%: 'leakySub' (for SubClass MyNat) has leaky data-field binder types, which may cause `isDefEq` failures at instances transparency (e.g. in `grind`). Consider redefining it with `fast_instance%` or `inferInstanceAs%`. To suppress: `set_option Elab.fast_instance.warnLeakySubInstances false` ``` The leakiness check uses `withDisabledInstance` to temporarily evict the sub-instance from the discrimination tree (preventing trivial self-match via `trySynthInstance`), then compares against the canonical form at instances transparency. A `warnLeaky` parameter propagates through recursive calls to prevent nested warnings. The warning is suppressed via `set_option Elab.fast_instance.warnLeakySubInstances false`. - [ ] depends on: #36701 🤖 Prepared with Claude Code t-meta blocked-by-other-PR large-import LLM-generated merge-conflict 415/21 Mathlib/Algebra/Module/Congruence/Defs.lean,Mathlib/GroupTheory/Congruence/Defs.lean,Mathlib/Init.lean,Mathlib/RingTheory/Congruence/Defs.lean,Mathlib/RingTheory/Ideal/Quotient/Basic.lean,Mathlib/RingTheory/Ideal/Quotient/Defs.lean,Mathlib/Tactic/DefEqAbuse.lean,Mathlib/Tactic/FastInstance.lean,MathlibTest/CheckInstance.lean,MathlibTest/DefEqAbuse.lean,MathlibTest/InferInstanceAsPercent.lean 11 7 ['Vierkantor', 'eric-wieser', 'github-actions', 'mathlib-dependent-issues', 'mathlib-merge-conflicts'] Vierkantor
assignee:Vierkantor
56-4421
1 month ago
67-68526
67 days ago
0-1003
16 minutes
37249 yuma-mizuno
author:yuma-mizuno
 feat(Algebra): add multivariate Laurent polynomials --- ~~I used Codex to imitate the `MvPolynomial` API.~~ Now it has been rewritten by hand to focus on its `AddMonoidAlgebra` features. Proving `UniqueFactorizationMonoid` is my next plan. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra awaiting-author
label:t-algebra$
 268/0 Mathlib.lean,Mathlib/Algebra/MvLaurentPolynomial/Basic.lean 2 5 ['YaelDillies', 'eric-wieser', 'github-actions', 'yuma-mizuno'] nobody
55-83365
1 month ago
56-56168
56 days ago
0-26623
7 hours
37436 RemyDegenne
author:RemyDegenne
 feat: UniformIntegrable lemmas --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) WIP brownian t-measure-probability 109/0 Mathlib/MeasureTheory/Function/L1Space/Integrable.lean,Mathlib/MeasureTheory/Function/LpSeminorm/Basic.lean,Mathlib/MeasureTheory/Function/UniformIntegrable.lean 3 1 ['github-actions'] nobody
52-33351
1 month ago
unknown
0-0
0 seconds
37429 RemyDegenne
author:RemyDegenne
 feat: API for stoppedValue and StoppedProcess Co-authored-by: Thomas Zhu Co-authored-by: Alessio Rondelli --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) brownian t-measure-probability awaiting-author 37/3 Mathlib/Probability/Process/Stopping.lean 1 3 ['EtienneC30', 'github-actions'] nobody
52-33085
1 month ago
52-33085
52 days ago
0-6963
1 hour
37294 eric-wieser
author:eric-wieser
 feat(MatrixExponential): remove some rat-algebra arguments [#Is there code for X? > Algebra structures being induced @ 💬](https://leanprover.zulipchat.com/#narrow/channel/217875-Is-there-code-for-X.3F/topic/Algebra.20structures.20being.20induced/near/582277644) --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) - [ ] depends on: #37292 t-analysis 89/8 Mathlib/Analysis/Normed/Algebra/MatrixExponential.lean 1 2 ['github-actions', 'mathlib-dependent-issues'] nobody
51-35963
1 month ago
unknown
0-0
0 seconds
36728 chenson2018
author:chenson2018
 feat: linter for terminal squeezes See discussion at [#**mathlib4>linter requests@576559620** ](https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/linter.20requests/near/576559620). This PR adds a linter that indicates when a flexible terminal tactic is squeezed and can be replaced by the unsqueezed equivalent. Like the other tactic analysis linters, this is off by default and intended for periodic reports. At the moment, this includes only `simp` and `simp_all`, just like the flexible linter, and does not take the further step of removing unused `simp` arguments. The style guide specifies that > a simp call is terminal if it closes the current goal or is only followed by flexible tactics and this linter complies with this by checking not only for "literal terminal" tactics that are syntactically the last to close a goal but also for "block terminal" tactics that are only followed by tactics permitted to follow a flexible tactic. (This terminology is not standard, but is a nice suggestion by @adomani) --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) large-import t-linter awaiting-author 109/1 Mathlib/Tactic/Linter/FlexibleLinter.lean,Mathlib/Tactic/TacticAnalysis/Declarations.lean,MathlibTest/TacticAnalysis.lean 3 11 ['SnirBroshi', 'chenson2018', 'github-actions', 'grunweg'] thorimur
assignee:thorimur
51-34914
1 month ago
51-44665
51 days ago
12-13181
12 days
37101 fsefzig
author:fsefzig
 feat: definition of kummer polynomials and prove that AdjoinRoot (KummerPolynomial n s) is etale This defines the Kummer polynomial ` KummerPolynomial n s := X^n - s` over a ring R and constructs the following instances for `AdjoinRoot (KummerPolynomial n s)`: · Faithfullyflat · SmoothOfRelativeDimension 0 · Etale t-ring-theory new-contributor awaiting-author 345/0 Mathlib.lean,Mathlib/RingTheory/AdjoinRootKummer.lean 2 24 ['acmepjz', 'chrisflav', 'fsefzig', 'github-actions', 'vihdzp'] nobody
51-14627
1 month ago
unknown
0-0
0 seconds
37585 cascone26
author:cascone26
 feat: formal statements of Robin's and Lagarias' inequalities equivalent to RH ## Summary This PR adds `Mathlib/NumberTheory/LSeries/RobinInequality.lean`, which contains formal Lean 4 statements of two classical equivalences of the Riemann Hypothesis: **Robin's theorem (1984):** RH ↔ σ₁(n) < e^γ · n · ln(ln(n)) for all n > 5040 **Lagarias' theorem (2002):** RH ↔ σ₁(n) ≤ H_n + exp(H_n) · ln(H_n) for all n ≥ 1 ### New declarations - `robinBound (n : ℕ) : ℝ` — the Robin bound e^γ · n · ln(ln(n)) - `lagariasBound (n : ℕ) : ℝ` — the Lagarias bound H_n + exp(H_n) · ln(H_n) - `robin_iff_RH : RiemannHypothesis ↔ ∀ n > 5040, σ₁(n) < robinBound n` - `lagarias_iff_RH : RiemannHypothesis ↔ ∀ n ≥ 1, σ₁(n) ≤ lagariasBound n` ### Status The **statements** are complete and use existing Mathlib primitives: - `ArithmeticFunction.sigma` for σ₁ - `Real.eulerMascheroniConstant` for γ - `harmonic` for H_n (with ℚ → ℝ coercion) - `RiemannHypothesis` from `Mathlib.NumberTheory.LSeries.RiemannZeta` The **proofs** are currently `sorry`. The Robin direction (RH → inequality) requires analytic number theory following Robin's original 1984 paper. The converse uses Gronwall's theorem on superior highly composite numbers. Both are substantial Mathlib projects in their own right. This PR establishes the formal statements as a foundation for future proof work. These equivalences are not currently formalized anywhere in Mathlib. ### References - G. Robin, *Grandes valeurs de la fonction somme des diviseurs et hypothèse de Riemann*, J. Math. Pures Appl. **63** (1984), 187–213. - J. Lagarias, *An elementary problem equivalent to the Riemann hypothesis*, Amer. Math. Monthly **109** (2002), 534–543. ### Note on `sorry` I'm aware Mathlib does not merge `sorry`-laden PRs in general. I'm submitting this as a draft to: 1. Get feedback on whether the statement formulation is idiomatic 2. Establish that these statements don't already exist in Mathlib under a different name 3. Invite collaboration on completing the proofs t-number-theory new-contributor 98/0 Mathlib/NumberTheory/LSeries/RobinInequality.lean 1 2 ['github-actions'] nobody
49-59792
1 month ago
unknown
0-0
0 seconds
36937 Yaohua-Leo
author:Yaohua-Leo
 feat(Algebra/Jordan): add first linearization lemmas for IsCommJordan [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) AI assistance disclosure: I used AI assistance for CI/debugging and module-structure fixes in this PR. The mathematical content and main lemmas were written by me, with help from @pelicanhere. This PR adds a new file `Mathlib/Algebra/Jordan/Linearization.lean` containing linearization lemmas for the commutative Jordan identity. Main declarations: * `IsCommJordan.four_nsmul_associator_mul_add` * `IsCommJordan.associator_mul_add` These lemmas formalize a first linearization of the commutative Jordan identity using `associator`, following McCrimmon, Proposition 1.8.5. --- I put these lemmas in a separate file because I expect follow-up linearization lemmas to belong naturally in the same place. I am also happy to rename declarations or move the file if reviewers would prefer. t-algebra new-contributor awaiting-author
label:t-algebra$
 60/0 Mathlib.lean,Mathlib/Algebra/Jordan/Linearization.lean 2 6 ['Yaohua-Leo', 'github-actions', 'grunweg', 'ocfnash'] ocfnash
assignee:ocfnash
49-39139
1 month ago
49-39139
49 days ago
13-10710
13 days
36813 AlexeyMilovanov
author:AlexeyMilovanov
 feat(Computability.Encoding): add self-delimiting unary and pair encodings Adds `unaryPrefix` (a self-delimiting $1^n 0$ code) and `prefixPair` to `Mathlib.Computability.Encoding`. **Key changes:** * **`unaryPrefix`**: A prefix-free unary encoding for $\mathbb{N}$, distinct from the existing `unaryEncodeNat`. * **`unaryPrefix_append_inj`**: A basic cancellation lemma that allows unique extraction of a unary prefix from a concatenated list. * **`prefixPair`**: A self-delimiting pairing function for boolean lists, defined as $\text{unaryPrefix } |x| \frown x \frown y$. * **`prefixPair_inj`**: A concise proof of pair injectivity leveraging the new prefix lemmas. t-computability new-contributor awaiting-author 56/1 Mathlib/Computability/Encoding.lean 1 2 ['Komyyy', 'github-actions'] Komyyy
assignee:Komyyy
48-66560
1 month ago
48-66560
48 days ago
16-42277
16 days
37644 matthunz
author:matthunz
 feat(Order/Causal): add `Causal` ordering for stream functions Adds `Causal` ordering for stream functions and related theorems: ```lean def Causal (f : Stream' α → Stream' β) : Prop := ∀ (x y : Stream' α) (t : ℕ), (∀ s, s ≤ t → x s = y s) → f x t = f y t ``` A stream function is causal if the output at time `t` depends only on inputs up to time `t`. Causal stream functions are commonly used in signal processing, reactive systems, and semantics of stateful computations, where outputs cannot depend on future inputs. ## Future work - Mealy machines: define Mealy machines as causal stream functions with state, and relate them to standard automata-theoretic constructions. - Feedback and delay operators: formalize feedback loops and delayed composition, enabling modeling of stateful and recursive stream definitions. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor t-order 79/0 Mathlib.lean,Mathlib/Order/Causal/Basic.lean,Mathlib/Order/Causal/Defs.lean 3 2 ['github-actions'] nobody
48-5623
1 month ago
unknown
0-0
0 seconds
36893 Komyyy
author:Komyyy
 feat: make `Primrec` and `Computable` `fun_prop` preds --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-computability 248/92 Mathlib/Computability/Primrec/Basic.lean,comment_out.sh,uncomment.sh 3 2 ['github-actions', 'mathlib-merge-conflicts'] nobody
47-45033
1 month ago
unknown
0-0
0 seconds
37663 khwilson
author:khwilson
 feat(NumberTheory/ArithmeticStatistics/Reducible): Counting reducible polynomials A result of van der Waerden critical in arithmetic statistics which shows that the number of reducible monic polynomials of degree n is O(H^(n-1)). --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) 441/2 Mathlib/Analysis/Asymptotics/SpecificAsymptotics.lean,Mathlib/Data/Set/Card.lean,Mathlib/NumberTheory/ArithmeticStatistics/Reducible.lean,Mathlib/NumberTheory/MahlerMeasure.lean 4 1 ['github-actions'] nobody
47-32082
1 month ago
unknown
0-0
0 seconds
37160 vihdzp
author:vihdzp
 feat: product of Coxeter matrices The Coxeter matrix `A * B` is the block matrix `!![A, 2; 2, B]`. --- I've used multiplication to denote this under the logic that the product of Coxeter groups has a Coxeter matrix given by this construction. Perhaps this isn't desirable, considering it doesn't match matrix multiplication. I'm open to suggestions. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-group-theory WIP 13/3 Mathlib/GroupTheory/Coxeter/Matrix.lean 1 5 ['github-actions', 'mathlib-bors', 'tb65536', 'vihdzp'] tb65536
assignee:tb65536
46-23386
1 month ago
46-23393
46 days ago
12-13791
12 days
37730 RemyDegenne
author:RemyDegenne
 feat: define total variation distance Define the total variation distance between two finite measures, using the variation of the difference seen as signed measures. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) please-adopt WIP t-measure-probability 56/0 Mathlib.lean,Mathlib/InformationTheory/TotalVariation/Basic.lean 2 1 ['github-actions'] nobody
45-47893
1 month ago
45-48231
45 days ago
0-1
1 second
37695 Morten-Ness
author:Morten-Ness
 refactor(GroupTheory/Complement): simplify complement proofs Simplifies the proofs of: - `Subgroup.IsComplement'.symm` - `Subgroup.isComplement_singleton_left` - `Subgroup.isComplement_singleton_right` No API changes. AI assistance: I used Codex/LLM suggestions as a starting point, then manually checked the proofs, and verified the final version locally. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-group-theory new-contributor awaiting-author 15/17 Mathlib/GroupTheory/Complement.lean 1 4 ['github-actions', 'tb65536'] tb65536
assignee:tb65536
45-47313
1 month ago
45-47313
45 days ago
0-68801
19 hours
37489 michael-novak-math
author:michael-novak-math
 feat: add the fundamental theorem of plane curves We add to the PlaneCurves file created in PR #36731 a classical result in the subject of differential geometry of plane curves: the fundamental theorem of plane curves. --------- - [ ] depends on: #36731 new-contributor t-differential-geometry t-analysis blocked-by-other-PR 651/0 Mathlib.lean,Mathlib/Analysis/InnerProductSpace/Calculus.lean,Mathlib/Geometry/PlaneCurves.lean,Mathlib/MeasureTheory/Integral/IntervalIntegral/FundThmCalculus.lean,docs/references.bib 5 5 ['github-actions', 'mathlib-dependent-issues', 'michael-novak-math'] nobody
45-37893
1 month ago
51-22749
51 days ago
0-13581
3 hours
37757 JovanGerb
author:JovanGerb
 chore(Order/liminfLimsup): use `to_dual` This PR uses `to_dual` on `limsup`. This PR still depends on many other PRs. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) 86/251 Mathlib/Order/LiminfLimsup.lean,Mathlib/Tactic/Translate/ToDual.lean 2 2 ['github-actions', 'mathlib-bors'] nobody
45-24946
1 month ago
45-25000
45 days ago
0-8
8 seconds
37057 erdOne
author:erdOne
 feat(AlgebraicTopology): `SimplexCategory.toTop_map_δ_apply` --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebraic-topology maintainer-merge awaiting-author merge-conflict 48/2 Mathlib/AlgebraicTopology/CechNerve.lean,Mathlib/AlgebraicTopology/SimplexCategory/Basic.lean,Mathlib/AlgebraicTopology/SimplexCategory/Defs.lean,Mathlib/AlgebraicTopology/TopologicalSimplex.lean,Mathlib/Data/Fin/SuccPred.lean 5 17 ['Raph-DG', 'dagurtomas', 'erdOne', 'github-actions', 'joelriou', 'mathlib-merge-conflicts', 'riccardobrasca'] robin-carlier
assignee:robin-carlier
44-57240
1 month ago
46-18480
46 days ago
4-49805
4 days
37652 yuanyi-350
author:yuanyi-350
 feat(ProbabilityTheory/MeasureTheorey): Add Coupling lemma ## Summary This PR formalizes a standard coupling bound on countable measurable spaces. More precisely, for a probability measure `μ` and measurable maps `Y Z : Ω → S` with `S` countable, it proves the `L¹` bound `∑' k : S, |(μ.map Y).real ({k} : Set S) - (μ.map Z).real ({k} : Set S)| ≤ 2 * μ.real {ω | Y ω ≠ Z ω}`. ## Main changes - add `tsum_restrict_preimage_singleton_eq` and `tsum_restrict_preimage_singleton_eq'` in `MeasureTheory/Measure/Restrict.lean`; - add `tsum_measureReal_restrict_preimage_singleton_eq`, `coupling_term_bound`, and `coupling_lemma` in `MeasureTheory/Measure/Real.lean`; - include some local cleanup in `MeasureTheory/Measure/Real.lean`, mainly simplifying `toReal`-related arguments and notation. ## References - Wikipedia: https://en.wikipedia.org/wiki/Coupling_(probability) --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-measure-probability awaiting-author 107/36 Mathlib/MeasureTheory/Measure/Real.lean,Mathlib/MeasureTheory/Measure/Restrict.lean 2 3 ['EtienneC30', 'RemyDegenne', 'github-actions'] kex-y
assignee:kex-y
44-45872
1 month ago
45-46821
45 days ago
2-15319
2 days
37281 AltSoKoly
author:AltSoKoly
 Update EdgeConnectivity.lean --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-combinatorics new-contributor awaiting-author 123/0 Mathlib/Combinatorics/SimpleGraph/Connectivity/EdgeConnectivity.lean,Mathlib/Data/Int/GCD.lean 2 5 ['github-actions', 'grunweg', 'themathqueen'] nobody
44-26504
1 month ago
56-17267
56 days ago
0-432
7 minutes
37344 vihdzp
author:vihdzp
 feat: monotone function `Cardinal → α` is eventually constant --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-set-theory t-order awaiting-author 57/0 Mathlib.lean,Mathlib/Logic/Small/Basic.lean,Mathlib/SetTheory/Cardinal/EventuallyConst.lean 3 3 ['YaelDillies', 'github-actions', 'vihdzp', 'wwylele'] YaelDillies
assignee:YaelDillies
43-51213
1 month ago
43-51213
43 days ago
10-47007
10 days
37111 tannerduve
author:tannerduve
 feat(Computability): add Nat.PrimrecIn and PrimrecIn - Add `Nat.PrimrecIn`: primitive recursive functions relative to a set of oracles - Add `PrimrecIn`: lifts `Nat.PrimrecIn` to `Primcodable` types A `PrimrecIn` version of `RecursiveIn.iff_nat` (i.e., `PrimrecIn O (f : ℕ → ℕ) ↔ Nat.PrimrecIn O f`) is left as future work as it requires proving `Nat.PrimrecIn O Nat.pred`, which needs additional API for `Nat.PrimrecIn`. --- Split out from #34937 as requested in review. - [x] depends on: #37061 t-computability new-contributor awaiting-author 24/0 Mathlib/Computability/RecursiveIn.lean 1 14 ['Komyyy', 'bryangingechen', 'github-actions', 'mathlib-dependent-issues', 'mathlib-merge-conflicts', 'tannerduve'] nobody
42-5017
1 month ago
43-17876
43 days ago
1-79421
1 day
36733 xroblot
author:xroblot
 feat(RamificationInertia): decomposition field and inertia field of subfields If `D` (resp. `E`) is the decomposition (resp. inertia) field of `P` in `L/K` and `F` is a subextension, then the decomposition (resp. inertia) field of the prime of `F` below `P` in `F/K` is` D ⊓ F` (resp. `E ⊓ F`). --- - [ ] depends on: #36544 - [ ] depends on: #35991 - [x] depends on: #36391. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) blocked-by-other-PR merge-conflict 818/31 Mathlib.lean,Mathlib/Algebra/Group/Subgroup/Basic.lean,Mathlib/FieldTheory/Galois/Basic.lean,Mathlib/FieldTheory/Galois/IsGaloisGroup.lean,Mathlib/FieldTheory/IntermediateField/Algebraic.lean,Mathlib/FieldTheory/Normal/Defs.lean,Mathlib/GroupTheory/QuotientGroup/Basic.lean,Mathlib/GroupTheory/QuotientGroup/Defs.lean,Mathlib/NumberTheory/RamificationInertia/Galois.lean,Mathlib/NumberTheory/RamificationInertia/HilbertTheory.lean,Mathlib/NumberTheory/RamificationInertia/Inertia.lean,Mathlib/NumberTheory/RamificationInertia/Ramification.lean,Mathlib/RingTheory/Ideal/Galois.lean 13 4 ['github-actions', 'mathlib-dependent-issues', 'mathlib-merge-conflicts'] nobody
41-85462
1 month ago
67-27477
67 days ago
0-48
48 seconds
36763 alok
author:alok
 refactor(Order/Filter/Germ): partial sections for Filter.Product ## Summary - Refactor `Filter.Product` from total functions to partial sections (`Product.Section`) with filter-large domains - Adapt the model-theoretic `Prestructure` and Łoś's theorem proofs to partial sections - Add `Germ ↔ Product` bridge equivalence for constant families ## Motivation The current `Filter.Product` is a quotient of total functions `(a : α) → ε a` by eventual equality. This requires all fibers to be inhabited, which is not the mathematically correct construction. The ultraproduct should only require a section defined on a filter-large set. The new `Product.Section` structure carries: - A domain `dom : Set α` with `dom ∈ l` - A dependent section `val : (a : dom) → ε a` Two sections are equivalent if they agree on some filter-large common domain. This matches the standard mathematical construction and enables proper ultraproducts where some fibers may be empty. ## Changes ### `Mathlib/Order/Filter/Germ/Basic.lean` - New `Product.Section` structure (partial section with filter-large domain) - `productSetoid` redefined over `Product.Section` - `Product.ofTotal` embeds total sections; `eq_iff_ofTotal` characterizes equality ### `Mathlib/ModelTheory/Ultraproducts.lean` - `sectionStructure`: first-order structure on partial sections (funMap restricts to domain intersection, RelMap checks on common domain) - `setoidPrestructure` adapted with full proofs of `fun_equiv` and `rel_equiv` - `funMap_cast`, `boundedFormula_realize_cast` (rel case), `all` quantifier case all reproved for partial sections - Łoś's theorem statement unchanged; `sentence_realize` still has the same API ### `Mathlib/Order/Filter/Germ/Product.lean` (new) - `Germ.toProduct` / `Product.toGerm`: round-trip between germs and constant-family products - `Germ.prodEquiv`: equivalence for inhabited constant families (backward compat) ## Test plan - [x] `lake build` passes (7607/7607 modules) - [x] All linter warnings resolved - [x] `Mathlib.ModelTheory.Satisfiability` (uses `Filter.Product` + `sentence_realize`) still compiles - [x] `Mathlib.Analysis.Real.Hyperreal` still compiles --- Context: [Zulip discussion](https://leanprover.zulipchat.com/#narrow/channel/217875-Is-there-code-for-X.3F/topic/Nonstandard.20Analysis/near/513178715) — Violeta Hernández asked for fixing the ultraproduct definition as the first step after #33650 deprecated the old hyperreal machinery. 🤖 Generated with [Claude Code](https://claude.com/claude-code) new-contributor merge-conflict 278/49 Mathlib.lean,Mathlib/ModelTheory/Ultraproducts.lean,Mathlib/Order/Filter/Germ/Basic.lean,Mathlib/Order/Filter/Germ/Product.lean 4 5 ['alok', 'github-actions', 'mathlib-merge-conflicts', 'plp127'] nobody
41-85461
1 month ago
unknown
0-0
0 seconds
36764 euprunin
author:euprunin
 chore: golf using `grind` The goal of this PR is to decrease the number of times lemmas are called explicitly. Any decrease in compilation time is a welcome side effect, although it is not a primary objective. Trace profiling results (differences <30 ms considered measurement noise): * `DirectSum.lequivCongrLeft_lof`: unchanged 🎉 * `AnalyticOnNhd.preimage_mem_codiscreteWithin`: unchanged 🎉 * `mem_permsOfList_of_mem`: unchanged 🎉 * `PNat.mod_le`: unchanged 🎉 * `Computation.map_parallel`: unchanged 🎉 * `Sigma.curry_update`: unchanged 🎉 Profiled using `set_option trace.profiler true in`. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) 11/41 Mathlib/Algebra/DirectSum/Module.lean,Mathlib/Analysis/Analytic/IsolatedZeros.lean,Mathlib/Data/Fintype/Perm.lean,Mathlib/Data/PNat/Basic.lean,Mathlib/Data/Seq/Parallel.lean,Mathlib/Data/Sigma/Basic.lean 6 13 ['chenson2018', 'euprunin', 'github-actions', 'mathlib-merge-conflicts'] nobody
41-52896
1 month ago
41-52956
41 days ago
66-24446
66 days
37055 euprunin
author:euprunin
 chore: golf using `grind` The goal of this PR is to decrease the number of times lemmas are called explicitly. Any decrease in compilation time is a welcome side effect, although it is not a primary objective. Trace profiling results (differences <30 ms considered measurement noise): * `OreLocalization.smul'_char`: unchanged 🎉 * `Equiv.Perm.cycleOf_mem_cycleFactorsFinset_iff`: unchanged 🎉 * `StrictMono.ite'`: unchanged 🎉 * `Mathlib.Meta.NormNum.isInt_ediv`: unchanged 🎉 Profiled using `set_option trace.profiler true in`. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) 10/29 Mathlib/GroupTheory/OreLocalization/Basic.lean,Mathlib/GroupTheory/Perm/Cycle/Factors.lean,Mathlib/Order/Monotone/Basic.lean,Mathlib/Tactic/NormNum/DivMod.lean 4 11 ['chenson2018', 'euprunin', 'github-actions'] nobody
41-50536
1 month ago
41-50597
41 days ago
59-47892
59 days
36989 MichaelStollBayreuth
author:MichaelStollBayreuth
 feat(NumberTheory/Height/EllipticCurve): new file This PR defines the "addition-and-subtraction map" on x-coordinates of pairs of points on elliptic curves and proves an inequality for the logarithmic height of the image. In a later PR, we will show that the map thus defined indeed comes from addition and subtraction on an elliptic curve. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-number-theory awaiting-author 214/0 Mathlib.lean,Mathlib/AlgebraicGeometry/EllipticCurve/Affine/AddSubMap.lean,Mathlib/NumberTheory/Height/EllipticCurve.lean 3 20 ['MichaelStollBayreuth', 'Multramate', 'github-actions', 'riccardobrasca'] Multramate and riccardobrasca
assignee:Multramate assignee:riccardobrasca
41-21225
1 month ago
41-21225
41 days ago
18-11884
18 days
37954 jdhart81
author:jdhart81
 feat(Data/ENNReal/Inv): add ENNReal.div_mul_div_cancel Proves a / b * (b / c) = a / c for b ≠ 0, b ≠ ∞ in ENNReal. Proof via mul_div_assoc and existing div_mul_cancel. AI Disclosure: This PR was developed with assistance from an LLM (Claude, Anthropic) for proof exploration and text drafting. The proof was compiled and verified locally by the contributor, who understands the mathematical content. This lemma is extracted from a larger formalization of information-theoretic bounds (Zenodo DOI: 10.5281/zenodo.19317983). --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-data new-contributor 5/0 Mathlib/Data/ENNReal/Inv.lean 1 2 ['github-actions'] nobody
40-27876
1 month ago
40-27874
40 days ago
0-75
1 minute
36744 farmanb
author:farmanb
 feat(CategoryTheory/Abelian/TorsionTheory): Introduce torsion theory for abelian categories --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-category-theory WIP 329/0 Mathlib.lean,Mathlib/CategoryTheory/Abelian/TorsionTheory/Basic.lean 2 11 ['farmanb', 'github-actions', 'joelriou', 'plp127'] nobody
40-26685
1 month ago
unknown
0-0
0 seconds
37817 artie2000
author:artie2000
 refactor(RingTheory/Ideal): standardise `RingHom` and `AlgHom` lifting API * Change `AlgHom.liftOfSurjective` to use the same set-up as `RingHom.liftOfSurjective` * Add lemmas until both operations have the same API * Make `RingHom.liftOfRightInverse_comp_apply` a `simp` lemma * Rename `AlgHom.liftOfSurjective_apply` to match `RingHom.liftOfSurjective_apply_comp` --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-ring-theory 125/32 Mathlib/Algebra/Category/Ring/FinitePresentation.lean,Mathlib/Algebra/Category/Ring/Topology.lean,Mathlib/RingTheory/Ideal/Maps.lean,Mathlib/RingTheory/Ideal/Quotient/Operations.lean,Mathlib/RingTheory/LocalRing/ResidueField/Polynomial.lean 5 1 ['github-actions'] nobody
40-902
1 month ago
40-845
40 days ago
0-1401
23 minutes
37751 JovanGerb
author:JovanGerb
 chore(Order/Filter/IsBounded): use `to_dual` use `to_dual` for `Filter.IsBounded` --- - [ ] depends on: #37747 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) blocked-by-other-PR merge-conflict 120/378 Mathlib/Algebra/Order/Monoid/Unbundled/Basic.lean,Mathlib/Data/Set/Finite/Lattice.lean,Mathlib/Order/Filter/AtTopBot/Basic.lean,Mathlib/Order/Filter/IsBounded.lean 4 3 ['github-actions', 'mathlib-dependent-issues', 'mathlib-merge-conflicts'] nobody
38-85262
1 month ago
45-24927
45 days ago
0-1523
25 minutes
38039 themathqueen
author:themathqueen
 chore(Topology): `UniformSpace.Completion` renames for morphisms - [ ] `UniformSpace.Completion.mapRingHom` -> `UniformSpace.RingHom.completion` - [ ] --- Just starting this now so that I don't forget again. Will hopefully get to it soon. See Zulip thread: [#mathlib4 > naming convention: `UniformSpace.Completion` morphisms](https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/naming.20convention.3A.20.60UniformSpace.2ECompletion.60.20morphisms) [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) WIP t-topology 24/11 Mathlib/Topology/Algebra/UniformRing.lean 1 1 ['github-actions'] nobody
38-32303
1 month ago
unknown
0-0
0 seconds
38040 homeowmorphism
author:homeowmorphism
 feat(FinitelyPresentedGroup): Add direct product instance Adds that the direct product of two finitely presented groups are finitely presented. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-group-theory 7/0 Mathlib/GroupTheory/FinitelyPresentedGroup.lean 1 5 ['copilot-pull-request-reviewer', 'github-actions', 'homeowmorphism', 'mathlib-bors'] nobody
38-24170
1 month ago
38-28036
38 days ago
0-7
7 seconds
38017 kbuzzard
author:kbuzzard
 perf(Algebra/Ring): faster Ring.toAddGroupWithOne instance An attempt to manually make `Ring.toAddGroupWithOne` a fast instance. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) [#mathlib4 > instance unfolding phenomenon @ 💬](https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/instance.20unfolding.20phenomenon/near/585295822) WIP t-algebra merge-conflict
label:t-algebra$
 64/18 Mathlib/Algebra/Field/Defs.lean,Mathlib/Algebra/Order/Floor/Ring.lean,Mathlib/Algebra/Ring/Defs.lean,Mathlib/Analysis/CStarAlgebra/Matrix.lean,Mathlib/Analysis/Normed/Unbundled/SpectralNorm.lean,Mathlib/Analysis/RCLike/Basic.lean,Mathlib/Data/Int/Cast/Defs.lean 7 7 ['eric-wieser', 'github-actions', 'kbuzzard', 'leanprover-radar'] nobody
37-61647
1 month ago
39-4020
39 days ago
0-2
2 seconds
37050 artie2000
author:artie2000
 DRAFT refactor: remove `ConvexCone` This draft PR deletes all downstream references to `ConvexCone` --- - [ ] depends on: #37053 - [x] depends on: #37054 - [x] depends on: #37058 - [ ] depends on: #37420 - [ ] depends on: #37298 - [ ] depends on: #36605 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) WIP blocked-by-other-PR large-import merge-conflict 114/173 Mathlib/Algebra/Group/Subgroup/Order.lean,Mathlib/Algebra/Group/Submonoid/Support.lean,Mathlib/Analysis/Convex/Cone/Basic.lean,Mathlib/Analysis/Convex/Cone/Closure.lean,Mathlib/Analysis/Convex/Cone/Extension.lean,Mathlib/Geometry/Convex/Cone/Dual.lean,Mathlib/Geometry/Convex/Cone/Pointed.lean 7 14 ['YaelDillies', 'artie2000', 'github-actions', 'mathlib-dependent-issues', 'mathlib-merge-conflicts'] nobody
37-26120
1 month ago
60-14285
60 days ago
0-1478
24 minutes
36770 Xmask19
author:Xmask19
 feat: invariance of domain via Brouwer's fixed point theorem Continuous and injective maps from Rn to Rn are open mappings. This is shown given Brouwer's fixed point theorem. The specific version of Brouwer's theorem assumed is that a continuous map from the closed unit ball to itself has a fixed point. It is used to show a lemma in this proof. Then assuming that invariance of domain isn't true gives a contradiction with this lemma. --- My supervisor has code for studying topological manifolds which relies on invariance of domain that can be found here: https://github.com/stevensivek/TopologicalManifolds and is planned to be submitted to Mathlib. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-topology new-contributor 617/5 Mathlib.lean,Mathlib/AlgebraicTopology/InvarianceOfDomain.lean,Mathlib/Analysis/Convex/GaugeRescale.lean,Mathlib/Topology/Closure.lean,Mathlib/Topology/Order.lean 5 2 ['github-actions'] nobody
37-12138
1 month ago
37-12114
37 days ago
0-6926
1 hour
37865 Jun2M
author:Jun2M
 feat(Combinatorics/Graph): Edge cut of `Graph` This PR introduces - `edgeCut`: A function on set of vertices that returns the set of edges with exactly one end in the set. - `IsEdgeCut`: A predicate for set of edges that promises it is `edgeCut` of some set. - `IsBridge`: An edge `e` is a bridge iff it is a singleton edge cut. - `IsBond`: An edge Set `B` is bond iff it is minimal nonempty edge cut. --- - [x] depends on: #35879 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-combinatorics 194/0 Mathlib/Combinatorics/Graph/Connected/EdgeCut.Lean,Mathlib/Combinatorics/Graph/Subgraph.lean 2 2 ['github-actions', 'mathlib-dependent-issues'] nobody
37-7265
1 month ago
37-24922
37 days ago
37-25071
37 days
38050 WilliamCoram
author:WilliamCoram
 feat: Define Newton polygons In this file we construct a method to define newton polygons using a Stream' of `Step`'s which correspond to what you would obtain via the 'algorithm' of rotating half-planes as described in Gouvea's p-adic numbers. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-number-theory new-contributor 620/0 Mathlib.lean,Mathlib/NumberTheory/NewtonPolygon.lean 2 3 ['github-actions', 'jcommelin'] nobody
37-2184
1 month ago
unknown
0-0
0 seconds
37474 Komyyy
author:Komyyy
 perf: no expose `SplittingField` and `GaloisField` --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra WIP merge-conflict
label:t-algebra$
 361/95 Mathlib/FieldTheory/Finite/GaloisField.lean,Mathlib/FieldTheory/SplittingField/Construction.lean,Mathlib/NumberTheory/Cyclotomic/Basic.lean,MathlibTest/instance_diamonds/FieldTheory/SplittingField/Construction.lean 4 7 ['Komyyy', 'github-actions', 'leanprover-radar', 'mathlib-bors', 'mathlib-merge-conflicts'] nobody
36-65194
1 month ago
51-52724
51 days ago
0-240
4 minutes
37247 yuma-mizuno
author:yuma-mizuno
 feat(GroupTheory/MonoidLocalization): add prime transport lemmas --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-ring-theory awaiting-author 75/7 Mathlib/GroupTheory/MonoidLocalization/MonoidWithZero.lean,Mathlib/RingTheory/Localization/Basic.lean,Mathlib/RingTheory/Localization/Defs.lean 3 6 ['github-actions', 'riccardobrasca'] riccardobrasca
assignee:riccardobrasca
36-45070
1 month ago
36-45070
36 days ago
20-41780
20 days
38113 robo7179
author:robo7179
 feat(SimpleGraph/PerfectGraph): add lemma graph is perfect iff all su… Perfect graph theorem , discussion on zulip thread: [#graph theory > Second Order Monadic Logic](https://leanprover.zulipchat.com/#narrow/channel/252551-graph-theory/topic/Second.20Order.20Monadic.20Logic.20for.20Graph/with/583013775) - [ ] depends on: #37680 - [ ] depends on: #37598 t-combinatorics new-contributor blocked-by-other-PR 54/0 Mathlib/Combinatorics/SimpleGraph/PerfectGraph.lean 1 3 ['github-actions', 'mathlib-dependent-issues'] nobody
36-36903
1 month ago
36-38262
36 days ago
0-69
1 minute
37420 artie2000
author:artie2000
 refactor: change definitions to avoid `ConvexCone` Change the definitions of `PointedCone.positive` and `PointedCone.closure` to avoid mentioning `ConvexCone`. This PR is part of a series deprecating `ConvexCone`: https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/Replacing.20.60ConvexCone.60.20with.20.60PointedCone.60/with/582738985 --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-convex-geometry maintainer-merge 10/4 Mathlib/Analysis/Convex/Cone/Closure.lean,Mathlib/Geometry/Convex/Cone/Pointed.lean 2 3 ['YaelDillies', 'github-actions', 'mathlib-merge-conflicts', 'ooovi', 'vihdzp'] nobody
36-36834
1 month ago
36-36798
36 days ago
51-57072
51 days
38122 grunweg
author:grunweg
 fix: properly tag structures with the stacks tag Currently, tagging a structure or class with the stacks or kerodon attribute [has no effect](https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/Tagging.20a.20class.20with.20.40stacks.20attribute.20has.20no.20effect/with/585908804) To demonstrate the issue, we manually fix all stacks tags on structures. There are 37 further instances of @[stacks] on classes, and 6 misplaced Kerodon tags; these are left to a future PR. --- Arguably, the stacks attribute should be fixed instead. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) WIP 31/21 Mathlib/Algebra/Field/Subfield/Defs.lean,Mathlib/AlgebraicGeometry/RelativeGluing.lean,Mathlib/CategoryTheory/Adjunction/Basic.lean,Mathlib/CategoryTheory/Functor/Basic.lean,Mathlib/CategoryTheory/Iso.lean,Mathlib/CategoryTheory/Limits/IsLimit.lean,Mathlib/CategoryTheory/Sites/Grothendieck.lean,Mathlib/CategoryTheory/Sites/Point/Conservative.lean,Mathlib/CategoryTheory/Triangulated/Basic.lean,Mathlib/CategoryTheory/Triangulated/Triangulated.lean,Mathlib/RingTheory/Ideal/Oka.lean,Mathlib/Topology/Spectral/Hom.lean 12 1 ['github-actions'] nobody
36-27937
1 month ago
36-27965
36 days ago
0-50
50 seconds
37199 mckoen
author:mckoen
 feat(CategoryTheory/Monoidal/Arrow): pushout-products of monomorphisms are monic Proves conditions under which the pushout-product of two monomorphisms is again a monomorphism. - [x] depends on: #33935 --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) WIP t-category-theory merge-conflict 580/0 Mathlib/CategoryTheory/Adhesive/Basic.lean,Mathlib/CategoryTheory/Monoidal/Arrow.lean,Mathlib/CategoryTheory/Monoidal/Limits/Shapes/Pullback.lean 3 3 ['github-actions', 'mathlib-dependent-issues', 'mathlib-merge-conflicts'] nobody
36-11884
1 month ago
57-58887
57 days ago
0-13
13 seconds
36774 euprunin
author:euprunin
 chore: replace long terminal `rw […]`:s (≥4 lemmas) with bare `simp`:s The goal of this PR is to decrease the number of times lemmas are called explicitly. Any decrease in compilation time is a welcome side effect, although it is not a primary objective. Trace profiling results (differences <30 ms considered measurement noise): * `Finset.lcm_union`: unchanged 🎉 * `Finset.gcd_union`: unchanged 🎉 * `Polynomial.derivative_eval₂_C`: unchanged 🎉 * `Polynomial.expand_pow`: unchanged 🎉 * `Cardinal.mk_real`: unchanged 🎉 * `Real.log_zpow`: unchanged 🎉 * `Matroid.eRank_le_encard_add_eRk_compl`: unchanged 🎉 * `DFinsupp.single_tsub`: unchanged 🎉 * `EReal.inv_neg`: unchanged 🎉 * `Finsupp.toMultiset_map`: unchanged 🎉 * `Finsupp.single_tsub`: unchanged 🎉 * `Multiset.countP_map`: unchanged 🎉 * `Nat.ascFactorial_eq_factorial_mul_choose'`: unchanged 🎉 * `Real.sign_intCast`: unchanged 🎉 * `Real.volume_eball`: unchanged 🎉 * `Real.volume_closedEBall`: unchanged 🎉 * `LFunction_ne_zero_of_not_quadratic_or_ne_one`: 295 ms before, 152 ms after 🎉 * `hasSum_one_div_nat_pow_mul_cos`: unchanged 🎉 * `inv_eq_of_aeval_divX_ne_zero`: unchanged 🎉 * `AlgebraicIndependent.aeval_comp_mvPolynomialOptionEquivPolynomialAdjoin`: unchanged 🎉 * `Ordinal.deriv_mul_eq_opow_omega0_mul`: unchanged 🎉 Profiled using `set_option trace.profiler true in`. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) 22/24 Mathlib/Algebra/GCDMonoid/Finset.lean,Mathlib/Algebra/Polynomial/Derivative.lean,Mathlib/Algebra/Polynomial/Expand.lean,Mathlib/Analysis/Real/Cardinality.lean,Mathlib/Analysis/SpecialFunctions/Log/Basic.lean,Mathlib/Combinatorics/Matroid/Rank/ENat.lean,Mathlib/Data/DFinsupp/Order.lean,Mathlib/Data/EReal/Inv.lean,Mathlib/Data/Finsupp/Multiset.lean,Mathlib/Data/Finsupp/Order.lean,Mathlib/Data/Multiset/Filter.lean,Mathlib/Data/Nat/Choose/Basic.lean,Mathlib/Data/Real/Sign.lean,Mathlib/MeasureTheory/Measure/Lebesgue/Basic.lean,Mathlib/NumberTheory/LSeries/Nonvanishing.lean,Mathlib/NumberTheory/ZetaValues.lean,Mathlib/RingTheory/Algebraic/Basic.lean,Mathlib/RingTheory/AlgebraicIndependent/Basic.lean,Mathlib/SetTheory/Ordinal/FixedPoint.lean 19 2 ['artie2000', 'euprunin', 'github-actions'] nobody
36-9105
1 month ago
66-17631
66 days ago
66-17342
66 days
37844 edegeltje
author:edegeltje
 feat(CategoryTheory): The (strict bi-)category of partial maps in a category This PR adds a type alias for the (strict bi-)category of partial maps in some category. Given some category `C`, the category of partial maps in `C` has the objects of `C`. 1-morphisms from `X : C` to `Y : C` are partial maps, and 2-morphisms from `f : X ⇀ Y` to `g : X ⇀ Y` are given by extending the support. It adds API for creating 1-morphisms and 2-morphisms in this bicategory, as well as defines various relevant functors and presheaves --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-category-theory awaiting-author 843/3 Mathlib.lean,Mathlib/CategoryTheory/Bicategory/LocallyDiscrete.lean,Mathlib/CategoryTheory/PartialMap/Defs.lean,Mathlib/CategoryTheory/PartialMap/PrePartialMap.lean 4 5 ['dagurtomas', 'edegeltje', 'github-actions'] nobody
35-85988
1 month ago
43-174
42 days ago
0-12805
3 hours
37938 SamuelSchlesinger
author:SamuelSchlesinger
 feat(Probability/Posterior): Posterior PMFs and Various Lemmas Upstreaming the probability lemmas needed in https://github.com/leanprover/cslib/pull/464. t-measure-probability new-contributor awaiting-author 130/0 Mathlib.lean,Mathlib/Probability/ProbabilityMassFunction/Posterior.lean 2 6 ['EtienneC30', 'SamuelSchlesinger', 'github-actions'] RemyDegenne
assignee:RemyDegenne
35-84646
1 month ago
37-31687
37 days ago
0-4092
1 hour
37907 grunweg
author:grunweg
 feat(by_contra,contrapose): warn if the push_neg step does nothing --- - [x] depends on: #31597 - [x] depends on: #37899 - [x] depends on: #37937 - [x] depends on: #37999 - [x] depends on: #38008 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) awaiting-CI t-meta 42/6 Mathlib/NumberTheory/ArithmeticFunction/LFunction.lean,Mathlib/Tactic/ByContra.lean,Mathlib/Tactic/Contrapose.lean,MathlibTest/Contrapose.lean,MathlibTest/byContra.lean 5 4 ['github-actions', 'grunweg', 'mathlib-dependent-issues', 'mathlib-merge-conflicts'] nobody
35-50582
1 month ago
42-1424
42 days ago
0-2
2 seconds
38139 sidbedi
author:sidbedi
 chore(Algebra/MvPolynomial/Variables): golf MvPolynomial.vars_0 to rfl --- The classical qualifier and explicit rewrite chain are unnecessary — the result holds definitionally. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor t-algebra awaiting-author
label:t-algebra$
 1/2 Mathlib/Algebra/MvPolynomial/Variables.lean 1 3 ['github-actions', 'grunweg'] nobody
35-42706
1 month ago
35-42706
35 days ago
0-34567
9 hours
38140 sidbedi
author:sidbedi
 chore(Data/Analysis/Filter): golf CFilter.ofEquiv_val to rfl --- cases F is unnecessary, the result holds definitionally. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-data new-contributor awaiting-author 1/2 Mathlib/Data/Analysis/Filter.lean 1 3 ['github-actions', 'grunweg'] nobody
35-42662
1 month ago
35-42662
35 days ago
0-34488
9 hours
36731 michael-novak-math
author:michael-novak-math
 feat: Frénet moving frame and Frénet equation for plane curves We define the curvature function, normal vector function and the Frénet moving frame for plane curve. We also prove the Frénet equations for plane curves. A separate PR (#37489) will prove the fundamental theorem of plane curves. new-contributor t-differential-geometry t-analysis awaiting-author 321/0 Mathlib.lean,Mathlib/Analysis/InnerProductSpace/Calculus.lean,Mathlib/Geometry/PlaneCurves.lean,Mathlib/MeasureTheory/Integral/IntervalIntegral/FundThmCalculus.lean,docs/references.bib 5 114 ['Ruben-VandeVelde', 'github-actions', 'grunweg', 'michael-novak-math', 'scholzhannah'] nobody
35-36643
1 month ago
48-14266
48 days ago
12-40134
12 days
37929 Vierkantor
author:Vierkantor
 chore(Tactic): rewrite `reduce_mod_char` tactic docstring This PR rewrites the docstrings for the `reduce_mod_char` tactic, to consistently match the official style guide, to make sure they are complete while not getting too long. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) documentation t-meta awaiting-author 22/12 Mathlib/Tactic/ReduceModChar.lean 1 4 ['JovanGerb', 'github-actions'] JovanGerb
assignee:JovanGerb
35-35498
1 month ago
35-35498
35 days ago
3-77447
3 days
38158 ADedecker
author:ADedecker
 Illustration of a weird behaviour --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-topology 23/0 Mathlib/Topology/Algebra/Module/Spaces/CompactConvergenceCLM.lean 1 1 ['github-actions'] nobody
35-31218
1 month ago
unknown
0-0
0 seconds
38130 edegeltje
author:edegeltje
 feat(CategoryTheory): Add the category of partial map diagrams This PR was split from #37844 --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-category-theory awaiting-author 324/0 Mathlib.lean,Mathlib/CategoryTheory/PartialMap/PrePartialMap.lean 2 13 ['chrisflav', 'dagurtomas', 'edegeltje', 'github-actions', 'joelriou', 'robin-carlier'] nobody
35-24162
1 month ago
35-24162
35 days ago
0-68688
19 hours
37480 erdOne
author:erdOne
 feat(AlgebraicTopology): homology of contractible spaces --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebraic-topology awaiting-author merge-conflict 62/4 Mathlib/AlgebraicTopology/SingularHomology/HomotopyInvarianceTopCat.lean,Mathlib/Topology/Category/TopCat/Limits/Basic.lean 2 25 ['FernandoChu', 'dagurtomas', 'erdOne', 'github-actions', 'joelriou', 'mathlib-merge-conflicts', 'vlad902'] dagurtomas
assignee:dagurtomas
35-21546
1 month ago
43-15903
43 days ago
7-33084
7 days
37683 SabrinaJewson
author:SabrinaJewson
 feat(Order/OrdContinuous): every map between complete lattices that preserves sSup is a left adjoint of some Galois connection It is already proven that the left side of a Galois connection is left-continuous; this provides the converse. --- - [ ] depends on: #37682 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor blocked-by-other-PR merge-conflict t-order 90/136 Mathlib/Order/ConditionallyCompleteLattice/Basic.lean,Mathlib/Order/ConditionallyCompletePartialOrder/Defs.lean,Mathlib/Order/OrdContinuous.lean,Mathlib/Order/SemiconjSup.lean,Mathlib/Tactic/Translate/ToDual.lean,Mathlib/Topology/Order/Basic.lean 6 4 ['github-actions', 'mathlib-dependent-issues', 'mathlib-merge-conflicts'] nobody
35-17270
1 month ago
46-72562
46 days ago
0-1447
24 minutes
37684 SabrinaJewson
author:SabrinaJewson
 feat(Topology/Order): provide lemmas linking topological continuity to order continuity All the hard work is already done, but this just fills in a couple convenient missing pieces. --- - [ ] depends on: #37682 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor blocked-by-other-PR merge-conflict t-topology 106/136 Mathlib/Order/ConditionallyCompleteLattice/Basic.lean,Mathlib/Order/ConditionallyCompletePartialOrder/Defs.lean,Mathlib/Order/OrdContinuous.lean,Mathlib/Order/SemiconjSup.lean,Mathlib/Tactic/Translate/ToDual.lean,Mathlib/Topology/Order/Basic.lean,Mathlib/Topology/Order/IsLUB.lean,Mathlib/Topology/Order/Monotone.lean 8 4 ['github-actions', 'mathlib-dependent-issues', 'mathlib-merge-conflicts'] nobody
35-17259
1 month ago
46-72563
46 days ago
0-1299
21 minutes
36843 xroblot
author:xroblot
 feat(NumberTheory/RamificationInertia/HilbertTheory): compositum of unramified extensions is unramified Add two theorems about the behaviour of ramification in composite extensions: - `Ideal.ramificationIdx_sup_eq_one`: if a prime `p` is unramified in both `F₁/K` and `F₂/K`, then it is unramified in `(F₁ ⊔ F₂)/K`. - `Ideal.ramificationIdx_inertiaDeg_sup_eq_one`: if `p` totally splits in both `F₁/K` and `F₂/K`, then it totally splits in `(F₁ ⊔ F₂)/K`. These are obtained by reducing to the Galois case (proved in the same file). --- - [ ] depends on: #36772 - [ ] depends on: #35991 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) large-import blocked-by-other-PR merge-conflict t-number-theory t-algebra
label:t-algebra$
 1327/32 Mathlib.lean,Mathlib/Algebra/Algebra/Hom.lean,Mathlib/Algebra/Group/Subgroup/Basic.lean,Mathlib/FieldTheory/Galois/Basic.lean,Mathlib/FieldTheory/Galois/IsGaloisGroup.lean,Mathlib/FieldTheory/IntermediateField/Algebraic.lean,Mathlib/FieldTheory/IntermediateField/ExtendTop.lean,Mathlib/FieldTheory/Normal/Defs.lean,Mathlib/GroupTheory/QuotientGroup/Basic.lean,Mathlib/GroupTheory/QuotientGroup/Defs.lean,Mathlib/NumberTheory/RamificationInertia/Basic.lean,Mathlib/NumberTheory/RamificationInertia/Galois.lean,Mathlib/NumberTheory/RamificationInertia/HilbertTheory.lean,Mathlib/RingTheory/AlgebraTower.lean,Mathlib/RingTheory/Ideal/Galois.lean,Mathlib/RingTheory/Invariant/Basic.lean,Mathlib/RingTheory/Localization/FractionRing.lean 17 3 ['github-actions', 'mathlib-dependent-issues', 'mathlib-merge-conflicts'] nobody
35-17237
1 month ago
64-47896
64 days ago
0-1289
21 minutes
37376 NoneMore
author:NoneMore
 feat(Topology/CantorBendixson): add iterated derived sets and perfect kernel Define the transfinite iteration of the relative derived-set operator via `gfpApprox` and introduce the perfect kernel of a set. --- AI disclosure: Most declarations, comments, and documentation in this PR were generated with Codex. Some proofs were structurally simplified using the `/golf` command from Lean 4 Skills. I reviewed the resulting code and documentation and can vouch for all submitted content. - [ ] depends on: #37374 - [x] depends on: #37375 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor blocked-by-other-PR t-topology 249/0 Mathlib.lean,Mathlib/SetTheory/Ordinal/FixedPointApproximants.lean,Mathlib/Topology/CantorBendixson.lean,Mathlib/Topology/DerivedSet.lean 4 4 ['github-actions', 'mathlib-dependent-issues', 'mathlib-merge-conflicts'] nobody
35-17228
1 month ago
53-24960
53 days ago
0-832
13 minutes
37365 lecopivo
author:lecopivo
 feat(Tactic/FunProp): theorem priority Add support for theorem priority for `fun_prop` --- Computing derivatives revealed that `fun_prop` really needs priority support for it theorems as `HasDerivAt.fun_pow'` should definitely have lower priority over `HasDerivAt.fun_pow`. - [ ] depends on: #37270 --> [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) large-import blocked-by-other-PR merge-conflict t-meta 1740/258 Mathlib.lean,Mathlib/Analysis/Calculus/Deriv/Add.lean,Mathlib/Analysis/Calculus/Deriv/AffineMap.lean,Mathlib/Analysis/Calculus/Deriv/Basic.lean,Mathlib/Analysis/Calculus/Deriv/Comp.lean,Mathlib/Analysis/Calculus/Deriv/Inv.lean,Mathlib/Analysis/Calculus/Deriv/Linear.lean,Mathlib/Analysis/Calculus/Deriv/Mul.lean,Mathlib/Analysis/Calculus/Deriv/Pi.lean,Mathlib/Analysis/Calculus/Deriv/Pow.lean,Mathlib/Analysis/Calculus/Deriv/Prod.lean,Mathlib/Analysis/Calculus/Deriv/Star.lean,Mathlib/Analysis/Calculus/Deriv/ZPow.lean,Mathlib/Analysis/Calculus/FDeriv/Basic.lean,Mathlib/Analysis/Calculus/FDeriv/Comp.lean,Mathlib/Analysis/Calculus/FDeriv/ContinuousAlternatingMap.lean,Mathlib/Analysis/Calculus/FDeriv/ContinuousMultilinearMap.lean,Mathlib/Analysis/Calculus/FDeriv/Defs.lean,Mathlib/Analysis/Calculus/FDeriv/Pow.lean,Mathlib/Analysis/Calculus/FDeriv/Prod.lean,Mathlib/Analysis/SpecialFunctions/Arcosh.lean,Mathlib/Analysis/SpecialFunctions/Arsinh.lean,Mathlib/Analysis/SpecialFunctions/Complex/LogDeriv.lean,Mathlib/Analysis/SpecialFunctions/ExpDeriv.lean,Mathlib/Analysis/SpecialFunctions/Exponential.lean,Mathlib/Analysis/SpecialFunctions/Log/Deriv.lean,Mathlib/Analysis/SpecialFunctions/Pow/Deriv.lean,Mathlib/Analysis/SpecialFunctions/Sqrt.lean,Mathlib/Analysis/SpecialFunctions/Trigonometric/ArctanDeriv.lean,Mathlib/Analysis/SpecialFunctions/Trigonometric/ComplexDeriv.lean,Mathlib/Analysis/SpecialFunctions/Trigonometric/Deriv.lean,Mathlib/Analysis/SpecialFunctions/Trigonometric/DerivHyp.lean,Mathlib/Analysis/SpecialFunctions/Trigonometric/InverseDeriv.lean,Mathlib/Tactic.lean,Mathlib/Tactic/FunProp.lean,Mathlib/Tactic/FunProp/Attr.lean,Mathlib/Tactic/FunProp/Core.lean,Mathlib/Tactic/FunProp/Decl.lean,Mathlib/Tactic/FunProp/Elab.lean,Mathlib/Tactic/FunProp/Simproc.lean,Mathlib/Tactic/FunProp/Theorems.lean,Mathlib/Tactic/FunProp/Types.lean,Mathlib/Tactic/Measurability.lean,MathlibTest/fun_prop2.lean,MathlibTest/fun_prop_dev.lean,MathlibTest/fun_prop_dev_out_param.lean 46 3 ['github-actions', 'mathlib-dependent-issues', 'mathlib-merge-conflicts'] nobody
35-17219
1 month ago
53-39367
53 days ago
0-629
10 minutes
37904 maddycrim
author:maddycrim
 feat(LinearAlgebra/PiTensorProduct/PiEquiv): Tensor Product and Direct Product Commute for Finitely Presented Modules From FLT Project. Main definitions: * `tensorPi_equiv_piTensor'` : `M ⊗[R] (Π i, N i) ≃ₗ[R] Π i, (M ⊗[R] N i)` for finite free modules * `tensorPi_equiv_piTensor` : the same but for finitely-presented modules. Depends on #38170 --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra
label:t-algebra$
 244/0 Mathlib.lean,Mathlib/Algebra/DirectSum/Module.lean,Mathlib/Algebra/Module/FinitePresentation.lean,Mathlib/LinearAlgebra/PiTensorProduct/PiEquiv.lean 4 5 ['github-actions', 'maddycrim', 'themathqueen'] nobody
35-15009
1 month ago
35-19061
35 days ago
0-3725
1 hour
38185 Jun2M
author:Jun2M
 feat(Order/Partition): operations over Frame This PR introduces: * `Partition.induce`: The induce of a partition by a frame element. * `Partition.disjUnion`: The disjoint union of two partitions. * `Partition.bind`: The finer partition obtained by family of partitions for each part of the original partition. Co-authored-by: Peter Nelson --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-order 89/11 Mathlib/Order/Partition/Basic.lean,Mathlib/Order/SupIndep.lean 2 1 ['github-actions'] nobody
35-3600
1 month ago
35-3672
35 days ago
35-3383
35 days
38154 ybenmeur
author:ybenmeur
 add subsingleton case to ExpChar --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra new-contributor
label:t-algebra$
 113/49 Mathlib/Algebra/CharP/Algebra.lean,Mathlib/Algebra/CharP/Basic.lean,Mathlib/Algebra/CharP/Defs.lean,Mathlib/Algebra/CharP/Lemmas.lean,Mathlib/Algebra/CharP/Subring.lean,Mathlib/Algebra/Polynomial/Expand.lean,Mathlib/FieldTheory/Perfect.lean,Mathlib/FieldTheory/PurelyInseparable/Exponent.lean,Mathlib/FieldTheory/SeparableDegree.lean,Mathlib/FieldTheory/SeparablyGenerated.lean,Mathlib/RingTheory/MvPolynomial/Basic.lean,Mathlib/RingTheory/MvPowerSeries/Expand.lean,Mathlib/RingTheory/Polynomial/Basic.lean,Mathlib/RingTheory/Polynomial/SeparableDegree.lean,Mathlib/RingTheory/Trace/Basic.lean 15 2 ['github-actions'] nobody
34-25028
1 month ago
unknown
0-0
0 seconds
37530 mcdoll
author:mcdoll
 fix(Topology/Algebra): fix bad simps and make arguments implicit for `PointwiseConvergenceCLM` We delete all `simps` calls in the definitions of operators on `PointwiseConvergenceCLM` and replace them with `apply_apply` lemmas that do not abuse the defeq between `SLₚₜ` and `SL`. This made the linter discover some typeclass duplications, which we remove by restructuring the file. As a consequence of the new `simp` lemmas, we can remove all `set_option backward.isDefEq.respectTransparency false in` in `Analysis.Distribution.TemperedDistribution`. Moreover, we make several arguments implicit, which can be inferred in almost all practical situations. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) not-ready-to-merge merge-conflict 88/69 Mathlib/Analysis/Distribution/TemperedDistribution.lean,Mathlib/Topology/Algebra/Module/Spaces/PointwiseConvergenceCLM.lean 2 5 ['github-actions', 'jcommelin', 'mathlib-merge-conflicts', 'mcdoll'] nobody
33-55056
1 month ago
33-55057
33 days ago
14-59669
14 days
37593 IlPreteRosso
author:IlPreteRosso
 refactor(Data.Finset.*Antidiagonal): rename set-based defs to `set*Antidiagonal` Renames set-based `Finset.mulAntidiagonal` → `setMulAntidiagonal` (and SMul/VAdd variants) to free the `mulAntidiagonal` name for the planned `HasMulAntidiagonal` typeclass. Deprecation aliases added. Supersedes #34551 t-ring-theory new-contributor merge-conflict 178/96 Mathlib/Algebra/Order/Antidiag/Prod.lean,Mathlib/Data/Finset/MulAntidiagonal.lean,Mathlib/Data/Finset/SMulAntidiagonal.lean,Mathlib/RingTheory/HahnSeries/Multiplication.lean,Mathlib/RingTheory/HahnSeries/PowerSeries.lean,Mathlib/RingTheory/HahnSeries/Summable.lean 6 3 ['github-actions', 'mathlib-merge-conflicts'] nobody
33-55055
1 month ago
33-55056
33 days ago
15-61521
15 days
37528 kim-em
author:kim-em
 feat: @[simps] warns when generating defeq abusing lemmas t-meta 202/16 Mathlib/Algebra/AddConstMap/Basic.lean,Mathlib/Algebra/Algebra/Subalgebra/MulOpposite.lean,Mathlib/Algebra/DirectSum/AddChar.lean,Mathlib/Algebra/DirectSum/Basic.lean,Mathlib/Algebra/Group/Action/Basic.lean,Mathlib/Algebra/Group/End.lean,Mathlib/Algebra/Group/Equiv/TypeTags.lean,Mathlib/Algebra/Group/Subgroup/Lattice.lean,Mathlib/Algebra/GroupWithZero/Action/Defs.lean,Mathlib/Algebra/Lie/Extension.lean,Mathlib/Algebra/Lie/NonUnitalNonAssocAlgebra.lean,Mathlib/Algebra/Lie/Quotient.lean,Mathlib/Algebra/Lie/Weights/Linear.lean,Mathlib/Algebra/Module/Equiv/Basic.lean,Mathlib/Algebra/Module/Presentation/Basic.lean,Mathlib/Algebra/Module/Presentation/Cokernel.lean,Mathlib/Algebra/Module/Presentation/DirectSum.lean,Mathlib/Algebra/Module/Presentation/Tautological.lean,Mathlib/Algebra/Module/Presentation/Tensor.lean,Mathlib/Algebra/Module/Submodule/Range.lean,Mathlib/Algebra/Module/Submodule/RestrictScalars.lean,Mathlib/Algebra/MonoidAlgebra/Defs.lean,Mathlib/Algebra/MonoidAlgebra/Opposite.lean,Mathlib/Algebra/Quaternion.lean,Mathlib/Algebra/Ring/Subring/MulOpposite.lean,Mathlib/Algebra/TrivSqZeroExt/Basic.lean,Mathlib/Algebra/Vertex/HVertexOperator.lean,Mathlib/Analysis/Analytic/ChangeOrigin.lean,Mathlib/Analysis/Calculus/ContDiff/FaaDiBruno.lean,Mathlib/Analysis/Normed/Affine/Isometry.lean,Mathlib/Analysis/Quaternion.lean,Mathlib/Combinatorics/Quiver/Basic.lean,Mathlib/Combinatorics/SimpleGraph/Clique.lean,Mathlib/Computability/ContextFreeGrammar.lean,Mathlib/Data/Bundle.lean,Mathlib/Data/Matrix/DualNumber.lean,Mathlib/Data/Multiset/Fintype.lean,Mathlib/Data/Real/ENatENNReal.lean,Mathlib/Data/Sym/Basic.lean,Mathlib/Geometry/Manifold/ContMDiffMFDeriv.lean,Mathlib/Geometry/Manifold/IsManifold/Basic.lean,Mathlib/GroupTheory/FreeAbelianGroup.lean,Mathlib/GroupTheory/Perm/Cycle/Type.lean,Mathlib/LinearAlgebra/ExteriorPower/Basic.lean,Mathlib/LinearAlgebra/Multilinear/DFinsupp.lean,Mathlib/Logic/Equiv/Basic.lean,Mathlib/Logic/Equiv/Fin/Basic.lean,Mathlib/Logic/Function/FromTypes.lean,Mathlib/ModelTheory/Bundled.lean,Mathlib/ModelTheory/Encoding.lean,Mathlib/ModelTheory/LanguageMap.lean,Mathlib/Order/CompleteSublattice.lean,Mathlib/Order/Hom/Bounded.lean,Mathlib/Order/Hom/BoundedLattice.lean,Mathlib/Order/Hom/CompleteLattice.lean,Mathlib/Order/Hom/Lattice.lean,Mathlib/Order/Sublattice.lean,Mathlib/RepresentationTheory/Basic.lean,Mathlib/RingTheory/Coalgebra/Hom.lean,Mathlib/RingTheory/Extension/Basic.lean,Mathlib/RingTheory/Extension/Cotangent/Basic.lean,Mathlib/RingTheory/Extension/Generators.lean,Mathlib/RingTheory/GradedAlgebra/HomogeneousLocalization.lean,Mathlib/RingTheory/HahnSeries/PowerSeries.lean,Mathlib/RingTheory/Ideal/Cotangent.lean,Mathlib/RingTheory/Ideal/Quotient/Operations.lean,Mathlib/RingTheory/IsAdjoinRoot.lean,Mathlib/RingTheory/PowerBasis.lean,Mathlib/RingTheory/RootsOfUnity/PrimitiveRoots.lean,Mathlib/Tactic/Simps/Basic.lean,Mathlib/Topology/Algebra/Module/Spaces/CompactConvergenceCLM.lean,Mathlib/Topology/Algebra/Module/Spaces/PointwiseConvergenceCLM.lean,Mathlib/Topology/Algebra/Module/Spaces/UniformConvergenceCLM.lean,Mathlib/Topology/FiberBundle/Constructions.lean,MathlibTest/Simps.lean 75 2 ['github-actions', 'mathlib-merge-conflicts'] nobody
33-52758
1 month ago
unknown
0-0
0 seconds
38245 RemyDegenne
author:RemyDegenne
 feat: CountableSupClosed Define the property for a set of being closed by countable supremum (resp. infimum). The new file is adapted from the `SupClosed` file, which describes sets closed by binary supremum. Also use `to_dual` on `SupClosed`. `CountableInfClosed` will be used in measure theory, for developments related to compact systems used for Kolmogorov's extension theorem and Choquet's capacitability theorem. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-order brownian 308/66 Mathlib.lean,Mathlib/Order/CountableSupClosed.lean,Mathlib/Order/SupClosed.lean 3 14 ['RemyDegenne', 'b-mehta', 'github-actions', 'vihdzp'] nobody
33-21386
1 month ago
33-35636
33 days ago
33-40071
33 days
37889 LLaurance
author:LLaurance
 chore(Algebra): shorten proof by using tactic mode instead of calc mode --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra delegated
label:t-algebra$
 4/13 Mathlib/Algebra/Star/Center.lean 1 16 ['JovanGerb', 'LLaurance', 'faenuccio', 'github-actions', 'grunweg', 'j-loreaux', 'mathlib-bors', 'themathqueen'] nobody
33-16573
1 month ago
41-21155
41 days ago
1-5229
1 day
32282 jsm28
author:jsm28
 feat(Geometry/Euclidean/Angle/Incenter): unoriented angle bisection Add lemmas giving unoriented angles involving the incenter and excenters of a triangle as expressions involving dividing angles of the triangle by 2, deduced from oriented bisection lemmas. --- - [ ] depends on: #30981 - [ ] depends on: #30982 - [ ] depends on: #31205 - [ ] depends on: #32019 - [ ] depends on: #32021 - [ ] depends on: #32259 - [ ] depends on: #32260 - [ ] depends on: #32270 - [ ] depends on: #32273 - [ ] depends on: #32278 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-euclidean-geometry 98/0 Mathlib/Geometry/Euclidean/Angle/Incenter.lean 1 8 ['github-actions', 'jsm28', 'mathlib-dependent-issues', 'mathlib4-merge-conflict-bot', 'wwylele'] nobody
32-75789
1 month ago
56-13341
56 days ago
56-13788
56 days
38270 Deicyde
author:Deicyde
 feat(Geometry/Manifold): The Tangent Functor on `MfldCat` A simple motivating example for PR #38223. We define the `tangentFunctor : MfldCat 𝕜 (n + 1) ⥤ MfldCat 𝕜 n` which takes any manifold to its tangent bundle and any smooth map to its pushforward. This is a standard construction in differential geometry. See: J. Lee, Smooth Manifolds, pg. 75 --- - [ ] depends on: #38223 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-differential-geometry blocked-by-other-PR new-contributor 320/0 Mathlib.lean,Mathlib/Geometry/Manifold/Category/MfldCat/Basic.lean,Mathlib/Geometry/Manifold/Category/MfldCat/TangentFunctor.lean,Mathlib/Geometry/Manifold/ContMDiffMap.lean 4 3 ['github-actions', 'mathlib-dependent-issues'] nobody
32-68111
1 month ago
unknown
0-0
0 seconds
38053 ntapiam
author:ntapiam
 feat(Analysis/Controls): add Control functions Add Control functions ---- This PR adds Control functions in the sense of rough paths theory (see e.g. [Friz-Victoir, Section 1.2.1](https://page.math.tu-berlin.de/~friz/master4_May6th.pdf)). They are related to p-variation norms which are the goal of #38055. I've shown most results in the above reference though those relating to 1-variation are still a work in progress. I had to add a few statements about convex functions in order to work over NNReal instead or Real, but I am not sure this is the best way to do it. The reason is that I've defined controls as taking values in NNReal (as they should). In particular there is ```lean4 theorem nnreal_of_real {f : ℝ≥0 → ℝ≥0} (hf : ConvexOn ℝ (Set.Ici 0) fun x : ℝ => (f x.toNNReal : ℝ)) : ConvexOn ℝ≥0 ⊤ f ``` which I didn't know where to put. It probably holds in more generality but I didn't check. I have also included two versions of Controls, one global and one restricted to a set. I tried to follow Mathlib conventions as best as I could but perhaps that could be improved as well. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) WIP t-analysis new-contributor 571/1 Mathlib.lean,Mathlib/Analysis/Controls/BoundedVariation.lean,Mathlib/Analysis/Controls/ControlOn.lean,Mathlib/Analysis/Controls/Defs.lean,Mathlib/Analysis/Convex/Function.lean,docs/references.bib 6 4 ['github-actions', 'ntapiam'] nobody
32-37159
1 month ago
38-2342
38 days ago
0-52
52 seconds
33108 alreadydone
author:alreadydone
 feat(Topology): `π₁(E⧸G)⧸π₁(E) ≃* G` for `E` path connected TODO: + finish last step (currently only `π₁(E⧸G) →* G` has been constructed) + characterization of the homomorphism + change of basepoint `e : E` leads to conjugation by `G` + if `G` is abelian then independent of choice of basepoint (and we can remove the ᵐᵒᵖ) + $\pi_1(S^1)\cong\mathbb{Z}$ + define winding number --- - [x] depends on: #7596 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebraic-topology WIP t-topology merge-conflict 232/36 Mathlib/Algebra/Regular/SMul.lean,Mathlib/AlgebraicTopology/FundamentalGroupoid/Basic.lean,Mathlib/AlgebraicTopology/FundamentalGroupoid/FundamentalGroup.lean,Mathlib/Topology/Covering/Quotient.lean,Mathlib/Topology/Homotopy/Lifting.lean,Mathlib/Topology/Homotopy/Path.lean 6 4 ['github-actions', 'mathlib-merge-conflicts', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
32-3291
1 month ago
154-2918
154 days ago
0-1
1 second
37432 mariainesdff
author:mariainesdff
 feat(Algebra/BigOperators/NatAntidiagonal): add ofAdd_antidiagonal Co-authored by: @xgenereux. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra awaiting-author
label:t-algebra$
 27/0 Mathlib/Algebra/BigOperators/NatAntidiagonal.lean 1 2 ['dagurtomas', 'github-actions'] dagurtomas
assignee:dagurtomas
31-48524
1 month ago
43-9882
43 days ago
9-25258
9 days
37444 vihdzp
author:vihdzp
 feat: typeclass for zero-dimensional spaces --- - [ ] depends on: #37317 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-topology large-import merge-conflict 151/110 Mathlib/Topology/Algebra/ClopenNhdofOne.lean,Mathlib/Topology/Category/LightProfinite/Basic.lean,Mathlib/Topology/Category/Profinite/Basic.lean,Mathlib/Topology/Category/Profinite/CofilteredLimit.lean,Mathlib/Topology/Category/Stonean/Basic.lean,Mathlib/Topology/ClopenBox.lean,Mathlib/Topology/Order.lean,Mathlib/Topology/Order/WithTop.lean,Mathlib/Topology/Separation/CompletelyRegular.lean,Mathlib/Topology/Separation/DisjointCover.lean,Mathlib/Topology/Separation/Lemmas.lean,Mathlib/Topology/Separation/Profinite.lean,Mathlib/Topology/UniformSpace/Ultra/Basic.lean 13 17 ['ADedecker', 'FernandoChu', 'github-actions', 'mathlib-dependent-issues', 'mathlib-merge-conflicts', 'vihdzp'] nobody
31-34339
1 month ago
31-35411
31 days ago
0-5306
1 hour
37479 ADedecker
author:ADedecker
 feat(Distribution): make parameters implicit in favor of type ascription Expanding on a suggestion by @faenuccio in an earlier PR, I make the regularity parameters of [TestFunction.fderivCLM](https://leanprover-community.github.io/mathlib4_docs/Mathlib/Analysis/Distribution/TestFunction.html#TestFunction.fderivCLM) (and similar constructions) implicit. This is a bit controversial, because it is essentially forcing type ascription in a lot of contexts. The rationale is that "the differentiation operator from `𝓓^{n}` to `𝓓^{k}`" matches mathematical practice, and is easier to parse than "the differentiation operator with parameters `n` and `k`". To make this even more convenient, I introduce notations like `𝓓^{n}` to be used when the spaces can be inferred but the regularity cannot. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-analysis awaiting-author 107/46 Mathlib/Analysis/Distribution/ContDiffMapSupportedIn.lean,Mathlib/Analysis/Distribution/TestFunction.lean 2 4 ['faenuccio', 'github-actions', 'j-loreaux', 'mathlib-merge-conflicts'] sgouezel
assignee:sgouezel
31-26536
1 month ago
44-85173
44 days ago
6-48011
6 days
37002 fbarroero
author:fbarroero
 WIP WIP --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-ring-theory WIP 109/0 Mathlib/RingTheory/Localization/Integral.lean 1 2 ['github-actions'] nobody
31-17992
1 month ago
61-5091
61 days ago
0-881
14 minutes
38339 xroblot
author:xroblot
 feat(NumberTheory/DirichletCharacter): add conductor_changeLevel and subgroups of characters mapping to one This PR main additions are: - `conductor_changeLevel`: the conductor is invariant under `changeLevel` (lifting to a multiple level does not change the conductor). - `primitiveCharacter_changeLevel_apply`: the primitive character of `changeLevel hm χ` equals that of `χ`. - `subgroupOfMapToOne`: the subgroup of characters of level `n` sending a fixed integer `a` (coprime to `n`) to `1`. - `subgroupOfPrimitiveMapToOne`: the subgroup of characters of level `n` whose primitive character sends a prime `p` to `1`. --- - [ ] depends on: #38340 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-number-theory blocked-by-other-PR 118/7 Mathlib/Data/ZMod/Coprime.lean,Mathlib/Data/ZMod/Units.lean,Mathlib/NumberTheory/DirichletCharacter/Basic.lean,Mathlib/NumberTheory/MulChar/Basic.lean 4 2 ['github-actions', 'mathlib-dependent-issues'] nobody
31-6952
1 month ago
31-6953
31 days ago
0-5165
1 hour
37659 erdOne
author:erdOne
 feat(AlgebraicTopology): relative singular homology --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-category-theory awaiting-author 205/2 Mathlib.lean,Mathlib/Algebra/Homology/ShortComplex/ShortExact.lean,Mathlib/AlgebraicTopology/SingularHomology/Basic.lean,Mathlib/AlgebraicTopology/SingularHomology/Relative.lean,Mathlib/CategoryTheory/MorphismProperty/Basic.lean 5 9 ['erdOne', 'github-actions', 'joelriou', 'mathlib-merge-conflicts', 'robin-carlier'] nobody
30-84651
1 month ago
42-21004
42 days ago
5-21324
5 days
38239 vihdzp
author:vihdzp
 chore(Order/SuccPred/Limit): reorganize sections In an effort to keep the file better organized, we move theorems which use `SuccOrder`/`PredOrder` as an assumption to a new section. No theorems have been changed. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-order merge-conflict 95/110 Mathlib/Order/SuccPred/Limit.lean 1 2 ['github-actions', 'mathlib-merge-conflicts'] nobody
30-84633
1 month ago
30-84634
30 days ago
2-48556
2 days
38321 ldct
author:ldct
 Tag absolute value lemmas with @[push] ## Summary - Tag `abs_mul`, `abs_pow`, `abs_mul_self`, `abs_inv`, `abs_div`, `abs_zpow`, and `abs_neg` with `@[push]` so that `push abs` can distribute absolute value through arithmetic expressions. - Add tests in `MathlibTest/push.lean` including a compound example: `|a ^ n * b⁻¹ / (-a)| = |a| ^ n * |b|⁻¹ / |a|` ## Test plan - [x] `lake env lean MathlibTest/push.lean` passes - [ ] CI 🤖 Generated with [Claude Code](https://claude.com/claude-code) t-algebra merge-conflict
label:t-algebra$
 44/7 Mathlib/Algebra/Order/Field/Basic.lean,Mathlib/Algebra/Order/Field/Power.lean,Mathlib/Algebra/Order/Group/Unbundled/Abs.lean,Mathlib/Algebra/Order/Ring/Abs.lean,MathlibTest/push.lean 5 2 ['github-actions', 'mathlib-merge-conflicts'] nobody
30-84631
1 month ago
unknown
0-0
0 seconds
37964 mortarsanjaya
author:mortarsanjaya
 feat(Algebra/Order/Floor): weaken assumptions on theorems about `FloorRing` This PR weakens as much assumptions as possible on theorems about `FloorSemiring` and `FloorRing`. Mainly, `IsOrderedRing` and `IsStrictOrderedRing` are weakened to just `IsOrderedAddMonoid` or removed completely from the assumptions on the theorems. Most theorems can be generalized as is or only requires a minor modification of replacing lemmas about casting naturals/integers preserving order (the likes of `Nat.cast_le`, `Int.cast_lt`, etc.) with the corresponding version for `FloorRing`. Some other lemmas require modification in the proofs, but these changes shorten the proofs. The new proof of the theorem `Int.mul_cast_floor_div_cancel_of_pos` requires an extra import. The assumption `IsOrderedAddMonoid` is required on lemmas that involve comparison + addition, and `IsOrderedRing` is required only on lemmas that involve comparison + multiplication of two non-integer elements. --- - [ ] depends on: #37714 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra new-contributor blocked-by-other-PR
label:t-algebra$
 349/266 Mathlib/Algebra/ContinuedFractions/Computation/Approximations.lean,Mathlib/Algebra/ContinuedFractions/Computation/TerminatesIffRat.lean,Mathlib/Algebra/Order/Floor/Defs.lean,Mathlib/Algebra/Order/Floor/Ring.lean,Mathlib/Algebra/Order/Floor/Semiring.lean,Mathlib/Algebra/Order/Round.lean,Mathlib/Data/Int/Log.lean,Mathlib/Data/Rat/Floor.lean,Mathlib/Topology/Algebra/Order/Floor.lean 9 4 ['github-actions', 'mathlib-dependent-issues', 'mathlib-merge-conflicts'] nobody
30-78110
1 month ago
39-79478
39 days ago
0-3854
1 hour
38356 SnirBroshi
author:SnirBroshi
 feat(Order/ConditionallyCompleteLattice/Finset): `sSup s ≠ ⊤` in a `CompleteLinearOrder` for a finite set without `⊤` --- btw `to_dual` here is blocked on #35213 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-order 20/0 Mathlib/Order/ConditionallyCompleteLattice/Finset.lean 1 1 ['github-actions'] nobody
30-72858
1 month ago
30-72933
30 days ago
30-72644
30 days
38195 thorimur
author:thorimur
 test: insert `@[informal]` attributes from overview --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) file-removed large-import merge-conflict 1961/353 Mathlib.lean,Mathlib/Algebra/AddTorsor/Defs.lean,Mathlib/Algebra/Algebra/Defs.lean,Mathlib/Algebra/Category/AlgCat/Basic.lean,Mathlib/Algebra/Category/ModuleCat/Basic.lean,Mathlib/Algebra/Category/Ring/Basic.lean,Mathlib/Algebra/CharP/Defs.lean,Mathlib/Algebra/CharP/Lemmas.lean,Mathlib/Algebra/CharZero/Defs.lean,Mathlib/Algebra/ContinuedFractions/Basic.lean,Mathlib/Algebra/EuclideanDomain/Defs.lean,Mathlib/Algebra/Field/Defs.lean,Mathlib/Algebra/FreeAlgebra.lean,Mathlib/Algebra/GCDMonoid/Basic.lean,Mathlib/Algebra/Group/Action/Defs.lean,Mathlib/Algebra/Group/Defs.lean,Mathlib/Algebra/Group/Hom/Defs.lean,Mathlib/Algebra/Group/Irreducible/Defs.lean,Mathlib/Algebra/Group/Subgroup/Defs.lean,Mathlib/Algebra/Group/Subgroup/Lattice.lean,Mathlib/Algebra/Homology/HomologicalComplex.lean,Mathlib/Algebra/Homology/ShortComplex/HomologicalComplex.lean,Mathlib/Algebra/Lie/Basic.lean,Mathlib/Algebra/Module/Defs.lean,Mathlib/Algebra/Module/LinearMap/Defs.lean,Mathlib/Algebra/Module/PID.lean,Mathlib/Algebra/MvPolynomial/Basic.lean,Mathlib/Algebra/Polynomial/Basic.lean,Mathlib/Algebra/Polynomial/Div.lean,Mathlib/Algebra/Polynomial/FieldDivision.lean,Mathlib/Algebra/Polynomial/Roots.lean,Mathlib/Algebra/Ring/Defs.lean,Mathlib/Algebra/Ring/Hom/Defs.lean,Mathlib/Algebra/Ring/Subring/Defs.lean,Mathlib/Algebra/Star/SelfAdjoint.lean,Mathlib/AlgebraicGeometry/Scheme.lean,Mathlib/Analysis/Analytic/Basic.lean,Mathlib/Analysis/Analytic/IsolatedZeros.lean,Mathlib/Analysis/Calculus/BumpFunction/Convolution.lean,Mathlib/Analysis/Calculus/ContDiff/Convolution.lean,Mathlib/Analysis/Calculus/ContDiff/Defs.lean,Mathlib/Analysis/Calculus/Deriv/MeanValue.lean,Mathlib/Analysis/Calculus/FDeriv/Comp.lean,Mathlib/Analysis/Calculus/FDeriv/Defs.lean,Mathlib/Analysis/Calculus/FDeriv/Equiv.lean,Mathlib/Analysis/Calculus/FDeriv/Mul.lean,Mathlib/Analysis/Calculus/Implicit.lean,Mathlib/Analysis/Calculus/InverseFunctionTheorem/FDeriv.lean,Mathlib/Analysis/Calculus/LocalExtr/Basic.lean,Mathlib/Analysis/Calculus/LocalExtr/Rolle.lean,Mathlib/Analysis/Complex/AbsMax.lean,Mathlib/Analysis/Complex/CauchyIntegral.lean,Mathlib/Analysis/Complex/Exponential.lean,Mathlib/Analysis/Complex/Liouville.lean,Mathlib/Analysis/Complex/PhragmenLindelof.lean,Mathlib/Analysis/Complex/Polynomial/Basic.lean,Mathlib/Analysis/Complex/RemovableSingularity.lean,Mathlib/Analysis/Complex/Schwarz.lean,Mathlib/Analysis/Complex/Trigonometric.lean,Mathlib/Analysis/Complex/ValueDistribution/FirstMainTheorem.lean,Mathlib/Analysis/Convex/Caratheodory.lean,Mathlib/Analysis/Convex/Deriv.lean,Mathlib/Analysis/Convex/Function.lean,Mathlib/Analysis/Convex/Integral.lean,Mathlib/Analysis/Convex/Jensen.lean,Mathlib/Analysis/Convolution.lean,Mathlib/Analysis/Distribution/Distribution.lean,Mathlib/Analysis/Distribution/SchwartzSpace/Basic.lean,Mathlib/Analysis/Distribution/TemperedDistribution.lean,Mathlib/Analysis/Distribution/TestFunction.lean,Mathlib/Analysis/Fourier/AddCircle.lean,Mathlib/Analysis/Fourier/FourierTransform.lean,Mathlib/Analysis/Fourier/Inversion.lean,Mathlib/Analysis/Fourier/RiemannLebesgueLemma.lean,Mathlib/Analysis/InnerProductSpace/Basic.lean,Mathlib/Analysis/InnerProductSpace/Defs.lean,Mathlib/Analysis/InnerProductSpace/Dual.lean,Mathlib/Analysis/InnerProductSpace/LaxMilgram.lean,Mathlib/Analysis/InnerProductSpace/LinearPMap.lean,Mathlib/Analysis/InnerProductSpace/Orthogonal.lean,Mathlib/Analysis/InnerProductSpace/PiL2.lean,Mathlib/Analysis/InnerProductSpace/Projection/Basic.lean,Mathlib/Analysis/InnerProductSpace/Projection/Reflection.lean,Mathlib/Analysis/InnerProductSpace/Rayleigh.lean,Mathlib/Analysis/InnerProductSpace/Spectrum.lean,Mathlib/Analysis/InnerProductSpace/l2Space.lean,Mathlib/Analysis/Normed/Group/AddTorsor.lean,Mathlib/Analysis/Normed/Group/InfiniteSum.lean,Mathlib/Analysis/Normed/Module/Basic.lean,Mathlib/Analysis/Normed/Module/DoubleDual.lean,Mathlib/Analysis/Normed/Module/FiniteDimension.lean,Mathlib/Analysis/Normed/Module/HahnBanach.lean,Mathlib/Analysis/Normed/MulAction.lean,Mathlib/Analysis/Normed/Operator/Banach.lean,Mathlib/Analysis/Normed/Operator/BanachSteinhaus.lean,Mathlib/Analysis/Normed/Operator/ContinuousLinearMap.lean,Mathlib/Analysis/Real/Hyperreal.lean,Mathlib/Analysis/SpecialFunctions/Arsinh.lean,Mathlib/Analysis/SpecialFunctions/Log/Basic.lean,Mathlib/Analysis/SpecialFunctions/Trigonometric/Inverse.lean 434 2 ['github-actions', 'mathlib-merge-conflicts'] nobody
30-31495
1 month ago
unknown
0-0
0 seconds
38190 AntoineChambert-Loir
author:AntoineChambert-Loir
 refactor(Topology/Sion): use a dense and continuous completion to generalize the statements Use the existence of a dense and continuous completion to simplify the final part of the proof of Sion's theorem. As a matter of fact, only an early lemma needs to be modified and the rest holds in weaker assumptions, leading to a serious simplification. Since the PR proving Sion is very recent and unused, we didn't add deprecation lemmas. --- - [ ] depends on: #37939 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) blocked-by-other-PR 249/119 Mathlib.lean,Mathlib/Data/Prod/Lex.lean,Mathlib/Order/Completion.lean,Mathlib/Topology/Order/Completion.lean,Mathlib/Topology/Sion.lean 5 8 ['AntoineChambert-Loir', 'github-actions', 'mathlib-dependent-issues', 'mathlib-merge-conflicts', 'vihdzp'] nobody
30-22165
1 month ago
34-82789
34 days ago
0-39
39 seconds
37279 imalinowskip
author:imalinowskip
 feat(Probability): multivariate CLT (and Cramèr-Wold) --- - [x] depends on: #36208 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor t-measure-probability awaiting-author large-import 500/1 Mathlib.lean,Mathlib/Probability/CentralLimitTheorem.lean,Mathlib/Probability/CramerWold.lean 3 10 ['EtienneC30', 'github-actions', 'imalinowskip', 'mathlib-dependent-issues', 'mathlib-merge-conflicts'] RemyDegenne
assignee:RemyDegenne
30-6703
1 month ago
43-31789
43 days ago
5-65208
5 days
37939 AntoineChambert-Loir
author:AntoineChambert-Loir
 feat(Order/Completion): embed a linear order into a dense and complete linear order The aim of the PR is to prove the following theorem that will be used as an input to [Sion.DMCompletion.exists_isSaddlePointOn](https://leanprover-community.github.io/mathlib4_docs/Mathlib/Topology/Sion.html#Sion.DMCompletion.exists_isSaddlePointOn) : *If `β` is any linear order, then there exists a complete and dense linear order `γ` together with a continuous embedding `ι : β ↪o γ` (for the order topologies on `β` and `γ`).* Meanwhile, the PR also records various instances about dense orders and lemmas regarding the Dedekind MacNeille completion and lexicographic orders. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-order 206/3 Mathlib.lean,Mathlib/Data/Prod/Lex.lean,Mathlib/Order/Completion.lean,Mathlib/Topology/Order/Completion.lean,Mathlib/Topology/Sion.lean 5 52 ['ADedecker', 'AntoineChambert-Loir', 'github-actions', 'mathlib-merge-conflicts', 'vihdzp'] vihdzp
assignee:vihdzp
30-1510
1 month ago
30-22241
30 days ago
33-21651
33 days
38325 Jun2M
author:Jun2M
 feat(Combinatorics/Graph): EndPoint function This PR introduces `endPoints`: `Set` of incident vertices, given an edge (in the case of non-edge, return empty). **Import change**: `Graph/Basic` now imports `Data/Set/Card` to allow reasoning about card of `endPoints`. [Relavent Zulip thread](https://leanprover.zulipchat.com/#narrow/channel/513188-CSLib/topic/New.20graph.20definitions/with/588616269) --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-combinatorics large-import 83/3 Mathlib/Combinatorics/Graph/Basic.lean 1 9 ['Jun2M', 'SnirBroshi', 'eric-wieser', 'github-actions', 'mathlib-bors'] nobody
29-79856
29 days ago
30-2286
30 days ago
31-58340
31 days
38266 staroperator
author:staroperator
 feat(Order/CompleteLatticeIntervals): `ConditionallyCompleteLinearOrderBot` for `Set.Iio` `Set.Iio a` (when it's nonempty) inherits the `ConditionallyCompleteLinearOrderBot` structure from the base type. This is commonly used in set theory, where we consider the ordinals within `a`, and convert `Iio a` from/to `Ordinal`. There should also be a `ConditionallyCompleteLinearOrder` instance, but adding this seems difficult for now because the junk value may not be the same as bottom (which has been mentioned as "refactor that will allow different default values for `sSup` and `sInf`" in the module doc). Since my motivation is for the ordinals purely, this PR only adds a single `ConditionallyCompleteLinearOrderBot` instance. --- I'm not very familiar with the API design here, so any suggestion would be helpful. - [ ] depends on: #35674 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-order blocked-by-other-PR 76/0 Mathlib/Order/Bounds/Basic.lean,Mathlib/Order/CompleteLatticeIntervals.lean,Mathlib/Order/LatticeIntervals.lean 3 7 ['github-actions', 'mathlib-dependent-issues', 'staroperator', 'vihdzp'] nobody
29-72521
29 days ago
29-72522
29 days ago
3-4203
3 days
38397 staroperator
author:staroperator
 feat(ModelTheory): add `DefinablePred` for `fun_prop` automation This PR adds `DefinablePred`. It is the same as `Definable`, except the latter applies on `Set (α → M)` and the former applies on `(α → M) → Prop`. There main reason to add this is that I want to automate the definability proof of predicates, and that `fun_prop` works on functions (that include predicates) but not on sets. For example, with appropriate `fun_prop` lemmas added, one can automate definability result like this: ```lean4 theorem IsLinearSet.definable [Finite α] (hs : IsLinearSet s) : A.Definable presburger s := by ... -- ⊢ A.DefinablePred presburger fun x ↦ -- ∃ y, (∃ a, ∀ (x : α), y x = ∑ x_1, a x_1 * ↑x_1 x) ∧ ∀ (x_1 : α), v x_1 + y x_1 = x x_1 fun_prop ``` This PR also removes certain `fun_prop` tags that would or should not be used in automation. --- Note: one may argue that we don't need a new definition if we use `aesop` instead of `fun_prop`. However, in that case, we still need to write lemmas for `{x | p x}` targets (e.g. for `{x | p x ∧ q x}`), which have almost no difference with lemmas on `p` or `fun x => p x ∧ q x` directly. - [ ] depends on: #38393 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-logic blocked-by-other-PR 500/261 Mathlib/ModelTheory/Algebra/Classes.lean,Mathlib/ModelTheory/Algebra/Field/IsAlgClosed.lean,Mathlib/ModelTheory/Algebra/Ring/Basic.lean,Mathlib/ModelTheory/Arithmetic/Presburger/Basic.lean,Mathlib/ModelTheory/Arithmetic/Presburger/Definability.lean,Mathlib/ModelTheory/Definability.lean,Mathlib/ModelTheory/Order.lean 7 2 ['github-actions', 'mathlib-dependent-issues'] nobody
29-68407
29 days ago
29-69771
29 days ago
0-403
6 minutes
38393 staroperator
author:staroperator
 refactor(ModelTheory): add typeclasses for algebraic symbols `Language.ring` and `Language.presburger` share the same symbols `0`, `1` and `+` and have duplicated instances on `Term` and `realize` simp lemmas. This PR makes these symbols certain typeclasses (similar to [`Language.IsOrdered`](https://leanprover-community.github.io/mathlib4_docs/Mathlib/ModelTheory/Order.html#FirstOrder.Language.IsOrdered)) and removes the duplication. It also adds certain definability lemmas that `fun_prop` can use. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-logic 332/201 Mathlib.lean,Mathlib/ModelTheory/Algebra/Classes.lean,Mathlib/ModelTheory/Algebra/Field/IsAlgClosed.lean,Mathlib/ModelTheory/Algebra/Ring/Basic.lean,Mathlib/ModelTheory/Algebra/Ring/FreeCommRing.lean,Mathlib/ModelTheory/Arithmetic/Presburger/Basic.lean,Mathlib/ModelTheory/Arithmetic/Presburger/Definability.lean 7 1 ['github-actions'] nobody
29-67550
29 days ago
29-67608
29 days ago
29-68871
29 days
38399 openendings
author:openendings
 feat: OrderHom.instOrderSupSet for LawfulSup Currently we have `instance [CompleteLattice β] : SupSet (α →o β)`. We replace this with a mere `LawfulSup` assumption such as #38328, . TODO: - [ ] construct an `OrderSupSet` instance instead of `SupSet` --- WIP - [ ] depends on: #38328 [or other `LawfulSup`] (based on master in case something else needs this) [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) WIP t-order new-contributor blocked-by-other-PR 26/0 Mathlib/Order/Hom/Order.lean 1 5 ['github-actions', 'mathlib-bors', 'mathlib-dependent-issues', 'openendings'] nobody
29-57011
29 days ago
29-59855
29 days ago
0-106
1 minute
37502 felixpernegger
author:felixpernegger
 refactor(Topology): rename ```LocPathConnected``` Rename ```LocPathConnected``` to ```LocallyPathConnected``` per discussion at https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/Rename.20.60.60.60LocPathConnectedSpace.60.60.60.3F/with/582824006 Deprecations were partly added with Claude --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-topology merge-conflict awaiting-author 369/304 Mathlib.lean,Mathlib/Analysis/CStarAlgebra/Unitary/Connected.lean,Mathlib/Analysis/Complex/UpperHalfPlane/Topology.lean,Mathlib/Geometry/Manifold/ChartedSpace.lean,Mathlib/Geometry/Manifold/Instances/Real.lean,Mathlib/Topology/Algebra/Module/LocallyConvex.lean,Mathlib/Topology/Compactness/DeltaGeneratedSpace.lean,Mathlib/Topology/Connected/LocPathConnected.lean,Mathlib/Topology/Connected/LocallyPathConnected.lean,Mathlib/Topology/Connected/PathComponentOne.lean,Mathlib/Topology/Homotopy/Lifting.lean,Mathlib/Topology/Homotopy/LocallyContractible.lean 12 9 ['SnirBroshi', 'felixpernegger', 'github-actions', 'grunweg', 'mathlib-bors', 'mathlib-merge-conflicts'] j-loreaux
assignee:j-loreaux
29-39147
29 days ago
50-41330
50 days ago
0-66443
18 hours
38388 supermanG
author:supermanG
 feat(Combinatorics/SimpleGraph): add ballFinset with basic identities Introduces `SimpleGraph.ballFinset`, the `Finset` companion to `SimpleGraph.ball` (#36443) on graphs with a `Fintype` vertex set, together with the basic identities `mem_ballFinset`, `ballFinset_zero`, and `ballFinset_one`. `SimpleGraph.ball` is the *open* metric ball `{u | edist u c < r}` and is indexed by `ℕ∞`; `ballFinset` is typed `ℕ → Finset V` for ergonomics at cardinality-facing call sites. The classical closed-ball cardinality at radius `r`, `|{u | edist u c ≤ r}|`, corresponds to `|ballFinset v (r + 1)|` in this setup. Opened as draft so CI can run before pinging maintainers. --- First-time Mathlib contribution — happy to adjust naming, file placement, or docstring style to match house conventions. Follow-up PRs will add cardinality envelopes (sphere cardinality, geometric-series bound, polynomial bound). t-combinatorics new-contributor LLM-generated 68/0 Mathlib.lean,Mathlib/Combinatorics/SimpleGraph/BallCardinality.lean 2 3 ['SnirBroshi', 'github-actions'] nobody
29-23061
29 days ago
unknown
0-0
0 seconds
37045 edegeltje
author:edegeltje
 feat(CategoryTheory/Limits): Pullback squares in cartesian monoidal categories This PR adds various lemmas about standard pullback squares in categories with chosen finite products. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-category-theory awaiting-author 351/0 Mathlib.lean,Mathlib/CategoryTheory/Limits/Shapes/Pullback/IsPullback/CartesianMonoidal.lean,Mathlib/CategoryTheory/Monoidal/Cartesian/Basic.lean 3 44 ['FernandoChu', 'dagurtomas', 'edegeltje', 'github-actions', 'joelriou', 'robin-carlier'] joelriou
assignee:joelriou
29-23058
29 days ago
29-23058
29 days ago
21-65314
21 days
26345 mans0954
author:mans0954
 feat(Analysis/LocallyConvex/Polar): Bipolar theorem The bipolar theorem states that the polar of the polar of a set `s` is equal to the closed absolutely convex hull of `s`. The argument here follows Conway, Chapter V. 1.8. This PR continues the work from #20843. Original PR: https://github.com/leanprover-community/mathlib4/pull/20843 - [x] depends on: #27316 t-analysis awaiting-author 171/6 Mathlib.lean,Mathlib/Analysis/LocallyConvex/AbsConvex.lean,Mathlib/Analysis/LocallyConvex/Bipolar.lean,Mathlib/Analysis/LocallyConvex/Polar.lean,Mathlib/Analysis/Normed/Module/Dual.lean,Mathlib/Topology/Algebra/Module/Spaces/WeakBilin.lean 6 136 ['JonBannon', 'eric-wieser', 'faenuccio', 'github-actions', 'goliath-klein', 'j-loreaux', 'leanprover-community-bot-assistant', 'mans0954', 'mathlib-merge-conflicts', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot', 'mcdoll', 'themathqueen', 'vihdzp'] faenuccio and j-loreaux
assignee:j-loreaux assignee:faenuccio
29-20159
29 days ago
33-32799
33 days ago
21-22015
21 days
38425 eric-wieser
author:eric-wieser
 fix: respect set_option in the unused tactic linter --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-linter 35/31 Mathlib/Tactic/Linter/UnusedTactic.lean 1 1 ['github-actions'] nobody
29-15385
29 days ago
unknown
0-0
0 seconds
37461 grunweg
author:grunweg
 chore: golf using the field tactic --- In the spirit of #31314. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict 32/43 Counterexamples/NowhereDifferentiable.lean,Mathlib/Analysis/Calculus/Monotone.lean,Mathlib/Analysis/Complex/BorelCaratheodory.lean,Mathlib/Analysis/MeanInequalities.lean,Mathlib/Analysis/Normed/Field/Lemmas.lean,Mathlib/Analysis/SpecialFunctions/Complex/LogBounds.lean,Mathlib/Analysis/SpecialFunctions/Elliptic/Weierstrass.lean,Mathlib/Analysis/SpecialFunctions/Integrals/Basic.lean,Mathlib/InformationTheory/KullbackLeibler/Basic.lean,Mathlib/LinearAlgebra/Lagrange.lean,Mathlib/MeasureTheory/Integral/MeanValue.lean,Mathlib/NumberTheory/ModularForms/Discriminant.lean,Mathlib/NumberTheory/ModularForms/EisensteinSeries/E2/Defs.lean,Mathlib/NumberTheory/ModularForms/EisensteinSeries/E2/MDifferentiable.lean,Mathlib/NumberTheory/ModularForms/QExpansion.lean,Mathlib/Probability/CentralLimitTheorem.lean,Mathlib/Probability/Distributions/Gaussian/CharFun.lean,Mathlib/RepresentationTheory/Homological/GroupCohomology/Hilbert90.lean,Mathlib/RingTheory/PowerSeries/Exp.lean,Mathlib/Topology/UnitInterval.lean 20 5 ['github-actions', 'grunweg', 'j-loreaux', 'mathlib-merge-conflicts'] nobody
28-84337
28 days ago
28-84338
28 days ago
22-59925
22 days
38000 grunweg
author:grunweg
 feat: linters for recommended field_simp style, rebased --- The current state fixes all sensible linter errors. TODOs prior to merging: - noisiness: right now, each `field` produces a try this suggestion (which doesn't work). warnings are useful; informational messages are superfluous - false positives 1: when `field` is applied to several goals (e.g., inside `<;>` and e.g. `ring` works for *some*, but not *all* occurrences), right now the linter still fires. It should not. - false positives 2: with `field` as a tactic discharger --- might be obsolete after the previous point. - [ ] depends on: #37461 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-linter blocked-by-other-PR awaiting-CI merge-conflict 156/65 Counterexamples/NowhereDifferentiable.lean,Mathlib.lean,Mathlib/Analysis/Calculus/Deriv/ZPow.lean,Mathlib/Analysis/Complex/BorelCaratheodory.lean,Mathlib/Analysis/Complex/Trigonometric.lean,Mathlib/Analysis/Convex/Join.lean,Mathlib/Analysis/Convex/Side.lean,Mathlib/Analysis/Distribution/Sobolev.lean,Mathlib/Analysis/Fourier/AddCircle.lean,Mathlib/Analysis/Hofer.lean,Mathlib/Analysis/InnerProductSpace/Projection/Basic.lean,Mathlib/Analysis/InnerProductSpace/Rayleigh.lean,Mathlib/Analysis/MeanInequalities.lean,Mathlib/Analysis/Normed/Field/Lemmas.lean,Mathlib/Analysis/SpecialFunctions/Complex/LogBounds.lean,Mathlib/Analysis/SpecialFunctions/Elliptic/Weierstrass.lean,Mathlib/Analysis/SpecialFunctions/Gamma/Deligne.lean,Mathlib/Analysis/SpecialFunctions/Integrals/Basic.lean,Mathlib/Analysis/SpecialFunctions/Integrals/PosLogEqCircleAverage.lean,Mathlib/Analysis/SpecialFunctions/OrdinaryHypergeometric.lean,Mathlib/Analysis/SpecialFunctions/Pow/Asymptotics.lean,Mathlib/Analysis/SpecialFunctions/Trigonometric/Chebyshev/RootsExtrema.lean,Mathlib/Geometry/Euclidean/Angle/Unoriented/Affine.lean,Mathlib/Geometry/Euclidean/Angle/Unoriented/Basic.lean,Mathlib/InformationTheory/KullbackLeibler/Basic.lean,Mathlib/Lean/Meta/WarningAsError.lean,Mathlib/LinearAlgebra/Lagrange.lean,Mathlib/MeasureTheory/Function/AbsolutelyContinuous.lean,Mathlib/MeasureTheory/Function/ConvergenceInDistribution.lean,Mathlib/MeasureTheory/Integral/MeanValue.lean,Mathlib/MeasureTheory/Measure/IntegralCharFun.lean,Mathlib/NumberTheory/Chebyshev.lean,Mathlib/NumberTheory/LSeries/AbstractFuncEq.lean,Mathlib/NumberTheory/ModularForms/Bounds.lean,Mathlib/NumberTheory/ModularForms/Discriminant.lean,Mathlib/NumberTheory/ModularForms/EisensteinSeries/E2/Defs.lean,Mathlib/NumberTheory/ModularForms/EisensteinSeries/E2/MDifferentiable.lean,Mathlib/NumberTheory/ModularForms/QExpansion.lean,Mathlib/NumberTheory/Ostrowski.lean,Mathlib/Probability/CentralLimitTheorem.lean,Mathlib/Probability/Distributions/Gaussian/CharFun.lean,Mathlib/Probability/Distributions/Gaussian/Real.lean,Mathlib/Probability/Distributions/Poisson/PoissonLimitThm.lean,Mathlib/RepresentationTheory/Homological/GroupCohomology/Hilbert90.lean,Mathlib/RingTheory/PowerSeries/Exp.lean,Mathlib/Tactic/Field.lean,Mathlib/Topology/MetricSpace/GromovHausdorff.lean 47 3 ['github-actions', 'mathlib-dependent-issues', 'mathlib-merge-conflicts'] nobody
28-83365
28 days ago
39-30301
39 days ago
0-24
24 seconds
38434 SnirBroshi
author:SnirBroshi
 feat(Combinatorics/SimpleGraph/Maps): `map` lemmas about support/top/bot --- - [ ] depends on: #38432 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) blocked-by-other-PR t-combinatorics 38/0 Mathlib/Combinatorics/SimpleGraph/Maps.lean,Mathlib/Logic/Relation.lean 2 2 ['github-actions', 'mathlib-dependent-issues'] nobody
28-76001
28 days ago
28-77795
28 days ago
0-845
14 minutes
37082 astrainfinita
author:astrainfinita
 chore(Order/CompleteLatticeIntervals): use different default values for `sSup` and `sInf` In a subsequent PR, some assumptions will be added to `ordConnectedSubsetConditionallyCompleteLinearOrderOfBotTop`. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-order awaiting-author 34/25 Mathlib/Order/CompleteLatticeIntervals.lean 1 5 ['YaelDillies', 'astrainfinita', 'bryangingechen', 'github-actions'] bryangingechen
assignee:bryangingechen
28-46315
28 days ago
28-46315
28 days ago
4-44808
4 days
35417 joneugster
author:joneugster
 refactor(Cache): use module name for file hash instead of non-resolved file path This PR continues the work from #21842. Original PR: https://github.com/leanprover-community/mathlib4/pull/21842 - [ ] depends on: #35415 - [ ] depends on: #35414 --- CI t-meta blocked-by-other-PR merge-conflict 147/250 Cache/Hashing.lean,Cache/IO.lean,Cache/Main.lean 3 5 ['github-actions', 'joneugster', 'mathlib-dependent-issues', 'mathlib-merge-conflicts'] nobody
28-43699
28 days ago
95-18036
95 days ago
0-568
9 minutes
38384 Jun2M
author:Jun2M
 chore(Combinatorics/Graph): per def "expose" tag `Combinatorics/Graph/Basic.lean` has a file-wide `expose` tag. This PR moves it to defs that requires them. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) large-import 26/24 Mathlib/Combinatorics/Graph/Basic.lean,Mathlib/Combinatorics/Graph/Subgraph.lean,Mathlib/Topology/CWComplex/Classical/Graph.lean 3 4 ['eric-wieser', 'github-actions', 'mathlib-bors'] nobody
28-34429
28 days ago
28-34431
28 days ago
1-52776
1 day
37794 EtienneC30
author:EtienneC30
 feat: a sum of independent Bernoulli random variables is a binomial random variable --- - [ ] depends on: #37736 - [ ] depends on: #37761 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-measure-probability large-import blocked-by-other-PR merge-conflict 743/40 Mathlib.lean,Mathlib/Algebra/BigOperators/Ring/Finset.lean,Mathlib/Data/ENNReal/Action.lean,Mathlib/Data/Set/Card.lean,Mathlib/MeasureTheory/Measure/AEMeasurable.lean,Mathlib/MeasureTheory/Measure/Real.lean,Mathlib/MeasureTheory/Measure/Typeclasses/Probability.lean,Mathlib/Probability/Distributions/Bernoulli.lean,Mathlib/Probability/Distributions/Binomial.lean,Mathlib/Probability/Distributions/Poisson/PoissonLimitThm.lean,Mathlib/Probability/Distributions/SetBernoulli.lean,Mathlib/Probability/HasLaw.lean,Mathlib/Probability/HasLawExists.lean,Mathlib/Probability/Independence/InfinitePi.lean,Mathlib/Probability/Moments/SubGaussian.lean,Mathlib/Probability/ProbabilityMassFunction/Binomial.lean,Mathlib/Probability/ProbabilityMassFunction/Constructions.lean,Mathlib/Probability/ProbabilityMassFunction/Integrals.lean 18 3 ['github-actions', 'mathlib-dependent-issues', 'mathlib-merge-conflicts'] nobody
28-31373
28 days ago
unknown
0-0
0 seconds
36803 EtienneC30
author:EtienneC30
 feat: pre-Brownian motion and independent increments Prove that a pre-Brownian motion has independent increments, and that a process with independent increments and the right marginals is pre-Brownian. Use this to show that a (pre-)Brownian motion is stable by `neg`. --- - [x] depends on: #36745 - [ ] depends on: #36616 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) brownian t-measure-probability blocked-by-other-PR large-import 578/2 Mathlib.lean,Mathlib/MeasureTheory/Function/L2Space.lean,Mathlib/Probability/BrownianMotion/Basic.lean,Mathlib/Probability/BrownianMotion/GaussianProjectiveFamily.lean,Mathlib/Probability/Distributions/Gaussian/HasGaussianLaw/Basic.lean,Mathlib/Probability/Distributions/Gaussian/Real.lean,Mathlib/Probability/HasLaw.lean,Mathlib/Probability/Moments/Basic.lean,Mathlib/Probability/Moments/Covariance.lean 9 3 ['github-actions', 'mathlib-dependent-issues', 'mathlib-merge-conflicts'] nobody
28-30592
28 days ago
45-41156
45 days ago
0-3049
50 minutes
37901 Raph-DG
author:Raph-DG
 feat(AlgebraicGeometry): Define algebraic cycles In this PR we define the notion of algebraic cycles on a scheme, and define the pushforward of an algebraic cycle by a quasicompact morhphism. This was originally defined in #26304, but after some refactoring it was decided that it would be best to split this definition into a separate PR. - [ ] depends on: #26304 --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) blocked-by-other-PR t-algebraic-geometry 250/0 Mathlib.lean,Mathlib/AlgebraicGeometry/AlgebraicCycle.lean,Mathlib/Topology/LocallyFinsupp/Pushforward.lean 3 2 ['github-actions', 'mathlib-dependent-issues'] nobody
28-26568
28 days ago
42-17205
42 days ago
0-365
6 minutes
37031 xroblot
author:xroblot
 feat(NumberField/CyclotomicField): inertia field of a cyclotomic field Let `K = ℚ(ζₙ)` with `n = p ^ k * m` where `p` is prime and `¬ p ∣ m`. Then the subfield `F = ℚ(ζₘ)` is the inertia field of any prime `P` of `𝓞 K` lying over `p`. --- - [ ] depends on: #36733 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) blocked-by-other-PR merge-conflict t-number-theory 581/21 Mathlib/Algebra/Group/Subgroup/Basic.lean,Mathlib/FieldTheory/Galois/Basic.lean,Mathlib/FieldTheory/IntermediateField/Algebraic.lean,Mathlib/NumberTheory/NumberField/Cyclotomic/Galois.lean,Mathlib/NumberTheory/RamificationInertia/Basic.lean,Mathlib/NumberTheory/RamificationInertia/Galois.lean,Mathlib/NumberTheory/RamificationInertia/HilbertTheory.lean,Mathlib/NumberTheory/RamificationInertia/Inertia.lean,Mathlib/NumberTheory/RamificationInertia/Ramification.lean 9 4 ['github-actions', 'mathlib-dependent-issues', 'mathlib-merge-conflicts'] nobody
28-26558
28 days ago
60-40606
60 days ago
0-323
5 minutes
38408 b-mehta
author:b-mehta
 chore(Mathlib): shake mathlib harder --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict 141294/11434 Mathlib/Algebra/AddConstMap/Basic.lean,Mathlib/Algebra/AddConstMap/Equiv.lean,Mathlib/Algebra/AddTorsor/Basic.lean,Mathlib/Algebra/AddTorsor/Defs.lean,Mathlib/Algebra/AffineMonoid/Basic.lean,Mathlib/Algebra/AffineMonoid/Embedding.lean,Mathlib/Algebra/AffineMonoid/Irreducible.lean,Mathlib/Algebra/AffineMonoid/UniqueSums.lean,Mathlib/Algebra/Algebra/Basic.lean,Mathlib/Algebra/Algebra/Bilinear.lean,Mathlib/Algebra/Algebra/Defs.lean,Mathlib/Algebra/Algebra/Epi.lean,Mathlib/Algebra/Algebra/Equiv.lean,Mathlib/Algebra/Algebra/Field.lean,Mathlib/Algebra/Algebra/Hom.lean,Mathlib/Algebra/Algebra/Hom/Rat.lean,Mathlib/Algebra/Algebra/IsSimpleRing.lean,Mathlib/Algebra/Algebra/NonUnitalHom.lean,Mathlib/Algebra/Algebra/NonUnitalSubalgebra.lean,Mathlib/Algebra/Algebra/Operations.lean,Mathlib/Algebra/Algebra/Opposite.lean,Mathlib/Algebra/Algebra/Pi.lean,Mathlib/Algebra/Algebra/Prod.lean,Mathlib/Algebra/Algebra/Rat.lean,Mathlib/Algebra/Algebra/RestrictScalars.lean,Mathlib/Algebra/Algebra/Shrink.lean,Mathlib/Algebra/Algebra/Spectrum/Basic.lean,Mathlib/Algebra/Algebra/Spectrum/Pi.lean,Mathlib/Algebra/Algebra/Spectrum/Quasispectrum.lean,Mathlib/Algebra/Algebra/StrictPositivity.lean,Mathlib/Algebra/Algebra/Subalgebra/Basic.lean,Mathlib/Algebra/Algebra/Subalgebra/Centralizer.lean,Mathlib/Algebra/Algebra/Subalgebra/Directed.lean,Mathlib/Algebra/Algebra/Subalgebra/IsSimpleOrder.lean,Mathlib/Algebra/Algebra/Subalgebra/Lattice.lean,Mathlib/Algebra/Algebra/Subalgebra/Matrix.lean,Mathlib/Algebra/Algebra/Subalgebra/MulOpposite.lean,Mathlib/Algebra/Algebra/Subalgebra/Operations.lean,Mathlib/Algebra/Algebra/Subalgebra/Order.lean,Mathlib/Algebra/Algebra/Subalgebra/Pi.lean,Mathlib/Algebra/Algebra/Subalgebra/Pointwise.lean,Mathlib/Algebra/Algebra/Subalgebra/Prod.lean,Mathlib/Algebra/Algebra/Subalgebra/Rank.lean,Mathlib/Algebra/Algebra/Subalgebra/Tower.lean,Mathlib/Algebra/Algebra/Subalgebra/Unitization.lean,Mathlib/Algebra/Algebra/Tower.lean,Mathlib/Algebra/Algebra/TransferInstance.lean,Mathlib/Algebra/Algebra/Unitization.lean,Mathlib/Algebra/Algebra/ZMod.lean,Mathlib/Algebra/AlgebraicCard.lean,Mathlib/Algebra/Azumaya/Basic.lean,Mathlib/Algebra/Azumaya/Defs.lean,Mathlib/Algebra/Azumaya/Matrix.lean,Mathlib/Algebra/BigOperators/Associated.lean,Mathlib/Algebra/BigOperators/Balance.lean,Mathlib/Algebra/BigOperators/Expect.lean,Mathlib/Algebra/BigOperators/Field.lean,Mathlib/Algebra/BigOperators/Fin.lean,Mathlib/Algebra/BigOperators/Finprod.lean,Mathlib/Algebra/BigOperators/Finsupp/Basic.lean,Mathlib/Algebra/BigOperators/Finsupp/Fin.lean,Mathlib/Algebra/BigOperators/Group/Finset/Basic.lean,Mathlib/Algebra/BigOperators/Group/Finset/Defs.lean,Mathlib/Algebra/BigOperators/Group/Finset/Gaps.lean,Mathlib/Algebra/BigOperators/Group/Finset/Indicator.lean,Mathlib/Algebra/BigOperators/Group/Finset/Interval.lean,Mathlib/Algebra/BigOperators/Group/Finset/Lemmas.lean,Mathlib/Algebra/BigOperators/Group/Finset/Pi.lean,Mathlib/Algebra/BigOperators/Group/Finset/Piecewise.lean,Mathlib/Algebra/BigOperators/Group/Finset/Powerset.lean,Mathlib/Algebra/BigOperators/Group/Finset/Preimage.lean,Mathlib/Algebra/BigOperators/Group/Finset/Sigma.lean,Mathlib/Algebra/BigOperators/Group/List/Basic.lean,Mathlib/Algebra/BigOperators/Group/List/Defs.lean,Mathlib/Algebra/BigOperators/Group/List/Lemmas.lean,Mathlib/Algebra/BigOperators/Group/Multiset/Basic.lean,Mathlib/Algebra/BigOperators/Group/Multiset/Defs.lean,Mathlib/Algebra/BigOperators/GroupWithZero/Action.lean,Mathlib/Algebra/BigOperators/GroupWithZero/Finset.lean,Mathlib/Algebra/BigOperators/Intervals.lean,Mathlib/Algebra/BigOperators/ModEq.lean,Mathlib/Algebra/BigOperators/Module.lean,Mathlib/Algebra/BigOperators/NatAntidiagonal.lean,Mathlib/Algebra/BigOperators/Option.lean,Mathlib/Algebra/BigOperators/Pi.lean,Mathlib/Algebra/BigOperators/Ring/Finset.lean,Mathlib/Algebra/BigOperators/Ring/List.lean,Mathlib/Algebra/BigOperators/Ring/Multiset.lean,Mathlib/Algebra/BigOperators/Ring/Nat.lean,Mathlib/Algebra/BigOperators/RingEquiv.lean,Mathlib/Algebra/BigOperators/Sym.lean,Mathlib/Algebra/BigOperators/WithTop.lean,Mathlib/Algebra/BrauerGroup/Defs.lean,Mathlib/Algebra/Category/AlgCat/Basic.lean,Mathlib/Algebra/Category/AlgCat/Limits.lean,Mathlib/Algebra/Category/AlgCat/Monoidal.lean,Mathlib/Algebra/Category/AlgCat/Symmetric.lean,Mathlib/Algebra/Category/BialgCat/Basic.lean,Mathlib/Algebra/Category/BialgCat/Monoidal.lean,Mathlib/Algebra/Category/BoolRing.lean 7930 3 ['Kha', 'b-mehta', 'bryangingechen'] nobody
28-23138
28 days ago
unknown
0-0
0 seconds
36853 matthunz
author:matthunz
 feat(CategoryTheory/Monoidal/Braded/Traced): add `TracedCategory` class Adds a `TracedCategory` class following [A. Joyal and R. Street and D. R. Verity, *Traced monoidal categories*](https://www.cambridge.org/core/journals/mathematical-proceedings-of-the-cambridge-philosophical-society/article/abs/traced-monoidal-categories/2BE85628D269D9FABAB41B6364E117C8#article): ```lean /-- A traced symmetric monoidal category. -/ class TracedCategory (C : Type u) [Category.{v} C] [MonoidalCategory.{v} C] [SymmetricCategory.{v} C] where /-- The trace operator. -/ trace : ∀ {A B : C} (W : C), (A ⊗ W ⟶ B ⊗ W) → (A ⟶ B) /-- Left tightening: sliding a morphism past the trace on the left. -/ trace_naturality_left : ∀ {A A' B : C} (W : C) (f : A' ⟶ A) (g : A ⊗ W ⟶ B ⊗ W), trace W (f ▷ W ≫ g) = f ≫ trace W g := by cat_disch /-- Right tightening: sliding a morphism past the trace on the right. -/ trace_naturality_right : ∀ {A B B' : C} (W : C) (f : A ⊗ W ⟶ B ⊗ W) (g : B ⟶ B'), trace W (f ≫ g ▷ W) = trace W f ≫ g := by cat_disch /-- Sliding: an endomorphism on the feedback wire slides past the trace. -/ trace_dinaturality : ∀ {A B W : C} (f : A ⊗ W ⟶ B ⊗ W) (h : W ⟶ W), trace W (f ≫ B ◁ h) = trace W (A ◁ h ≫ f) := by cat_disch /-- Superposing: trace commutes with left tensoring by a bystander object. -/ trace_superposing : ∀ {A B : C} (C' W : C) (f : A ⊗ W ⟶ B ⊗ W), C' ◁ trace W f = trace W ((α_ C' A W).hom ≫ C' ◁ f ≫ (α_ C' B W).inv) := by cat_disch /-- Vanishing I: trace over the tensor unit is the morphism itself (up to unitors). -/ trace_vanishing_one : ∀ {A B : C} (f : A ⊗ 𝟙_ C ⟶ B ⊗ 𝟙_ C), trace (𝟙_ C) f = (ρ_ A).inv ≫ f ≫ (ρ_ B).hom := by cat_disch /-- Vanishing II: trace over a tensor product equals iterated trace. -/ trace_vanishing_two : ∀ {A B X Y : C} (f : A ⊗ (X ⊗ Y) ⟶ B ⊗ (X ⊗ Y)), trace (X ⊗ Y) f = trace X (trace Y ((α_ A X Y).hom ≫ f ≫ (α_ B X Y).inv)) := by cat_disch /-- Yanking: the trace of the braiding is the identity. -/ trace_yanking : ∀ (W : C), trace W (β_ W W).hom = 𝟙 W := by cat_disch ``` ## Motivation `TracedCategory` can be used for denoting things like electric circuits, which require a traced symmetric monoidal category for the wire graph network. ## Future work - `instance [CompactClosedCategory C] : TracedCategory C` - possible notation such as `Tr_[W] f` --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-category-theory new-contributor awaiting-author merge-conflict 237/0 Mathlib.lean,Mathlib/CategoryTheory/Monoidal/Braided/Traced.lean,Mathlib/CategoryTheory/Monoidal/Rigid/Traced.lean,docs/references.bib 4 5 ['dagurtomas', 'github-actions', 'mathlib-merge-conflicts', 'matthunz'] nobody
28-17160
28 days ago
64-6723
64 days ago
0-25956
7 hours
38326 Jun2M
author:Jun2M
 feat(Combinatorics/Graph): Degree This PR adds definition of `incFun`, a nat function counting how many times an edge is incident to a vertex (2 if it is loop), and `eDegree` & `degree`, enat and nat valued degree function as a tsum of `incFun`. Co-authored-by: Peter Nelson --- - [ ] depends on: #38325 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) blocked-by-other-PR t-combinatorics 194/22 Mathlib.lean,Mathlib/Combinatorics/Graph/Basic.lean,Mathlib/Combinatorics/Graph/Degree/Defs.lean,Mathlib/Combinatorics/Graph/Subgraph.lean,Mathlib/Topology/CWComplex/Classical/Graph.lean 5 6 ['SnirBroshi', 'b-mehta', 'github-actions', 'mathlib-dependent-issues'] nobody
28-10421
28 days ago
31-58522
31 days ago
0-1332
22 minutes
38478 dagurtomas
author:dagurtomas
 feat(Tactic/CategoryTheory): op attribute Adding `@[op]` to a lemma named `H` of shape `∀ .., f = g`, where `f` and `g` are morphisms in some category `C`, creates a new lemma named `H_op` by applying `Quiver.Hom.op` to both sides and then simplifying with `simp only [op_comp, op_id]`. This PR also adds `op_of%`, and adjusts `@[map]` so that `@[op (attr := map)]` works for equalities of morphisms in opposite categories. --- - [ ] depends on: #37183 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) LLM-generated blocked-by-other-PR t-category-theory t-meta 491/0 Mathlib.lean,Mathlib/Tactic.lean,Mathlib/Tactic/CategoryTheory/Map.lean,Mathlib/Tactic/CategoryTheory/Op.lean,MathlibTest/CategoryTheory/Map.lean,MathlibTest/CategoryTheory/MapSimp.lean,MathlibTest/CategoryTheory/Op.lean 7 2 ['github-actions', 'mathlib-dependent-issues'] nobody
28-8871
28 days ago
28-19721
28 days ago
0-344
5 minutes
37276 dagurtomas
author:dagurtomas
 chore(CategoryTheory): use the extended map attribute --- - [ ] depends on: #37197 - [ ] depends on: #37275 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) WIP blocked-by-other-PR merge-conflict 970/206 Mathlib.lean,Mathlib/Algebra/Category/ModuleCat/Presheaf.lean,Mathlib/Algebra/Category/ModuleCat/Sheaf/Free.lean,Mathlib/Algebra/Category/ModuleCat/Sheaf/PullbackFree.lean,Mathlib/Algebra/Category/ModuleCat/Sheaf/PushforwardContinuous.lean,Mathlib/Algebra/Category/ModuleCat/Sheaf/Quasicoherent.lean,Mathlib/Algebra/Homology/DerivedCategory/ShortExact.lean,Mathlib/Algebra/Homology/HomotopyCategory.lean,Mathlib/Algebra/Homology/HomotopyCategory/Pretriangulated.lean,Mathlib/Algebra/Homology/HomotopyCategory/ShortExact.lean,Mathlib/Algebra/Homology/ShortComplex/Basic.lean,Mathlib/AlgebraicGeometry/Modules/Tilde.lean,Mathlib/AlgebraicGeometry/Morphisms/QuasiSeparated.lean,Mathlib/AlgebraicGeometry/Restrict.lean,Mathlib/AlgebraicGeometry/Stalk.lean,Mathlib/CategoryTheory/Adjunction/Basic.lean,Mathlib/CategoryTheory/Category/Preorder.lean,Mathlib/CategoryTheory/Equivalence.lean,Mathlib/CategoryTheory/Functor/Category.lean,Mathlib/CategoryTheory/Functor/Trifunctor.lean,Mathlib/CategoryTheory/Iso.lean,Mathlib/CategoryTheory/Limits/HasLimits.lean,Mathlib/CategoryTheory/Limits/Shapes/BinaryProducts.lean,Mathlib/CategoryTheory/Limits/Shapes/Kernels.lean,Mathlib/CategoryTheory/Limits/Shapes/Pullback/HasPullback.lean,Mathlib/CategoryTheory/Limits/Shapes/Pullback/PullbackCone.lean,Mathlib/CategoryTheory/Localization/Monoidal/Functor.lean,Mathlib/CategoryTheory/Monoidal/DayConvolution.lean,Mathlib/CategoryTheory/Monoidal/DayConvolution/Braided.lean,Mathlib/CategoryTheory/Monoidal/Functor.lean,Mathlib/CategoryTheory/Monoidal/NaturalTransformation.lean,Mathlib/CategoryTheory/NatIso.lean,Mathlib/CategoryTheory/NatTrans.lean,Mathlib/CategoryTheory/Sites/Continuous.lean,Mathlib/CategoryTheory/Sites/Descent/DescentData.lean,Mathlib/CategoryTheory/Sites/Descent/DescentDataPrime.lean,Mathlib/CategoryTheory/Sites/EqualizerSheafCondition.lean,Mathlib/CategoryTheory/Sites/Equivalence.lean,Mathlib/CategoryTheory/Triangulated/Basic.lean,Mathlib/Tactic.lean,Mathlib/Tactic/CategoryTheory/Map.lean,Mathlib/Tactic/CategoryTheory/MapOpposite.lean,MathlibTest/CategoryTheory/Map.lean,MathlibTest/CategoryTheory/MapPreorder.lean,MathlibTest/CategoryTheory/MapSimp.lean,MathlibTest/CategoryTheory/MapSimpCheck.lean 46 2 ['github-actions', 'mathlib-dependent-issues'] nobody
28-6363
28 days ago
56-21082
56 days ago
0-1
1 second
36824 j-loreaux
author:j-loreaux
 feat: generalize argument of `IsOrderedMonoid` from `CommMonoid` to `CommSemigroup` --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra merge-conflict
label:t-algebra$
 76/50 Mathlib/Algebra/Order/AddTorsor.lean,Mathlib/Algebra/Order/Group/Opposite.lean,Mathlib/Algebra/Order/GroupWithZero/Canonical.lean,Mathlib/Algebra/Order/Monoid/Basic.lean,Mathlib/Algebra/Order/Monoid/Canonical/Defs.lean,Mathlib/Algebra/Order/Monoid/Defs.lean,Mathlib/Algebra/Order/Monoid/OrderDual.lean,Mathlib/Algebra/Order/Monoid/Prod.lean,Mathlib/Algebra/Order/Monoid/Submonoid.lean,Mathlib/Algebra/Order/Monoid/TypeTags.lean,Mathlib/Algebra/Order/Pi.lean,Mathlib/MeasureTheory/Function/SimpleFunc.lean,Mathlib/Order/Filter/Germ/OrderedMonoid.lean,Mathlib/Topology/ContinuousMap/Lattice.lean 14 4 ['github-actions', 'j-loreaux', 'leanprover-radar', 'mathlib-merge-conflicts'] nobody
28-3022
28 days ago
65-11513
65 days ago
0-616
10 minutes
38498 SnirBroshi
author:SnirBroshi
 feat(Order/RelIso/Basic): lift a function to an order morphism into `Relation.Map` or from `Function.onFun` For an `α`-relation `r` we have: ``` mapRelHom (f : α → β) : r →r Relation.Map r f f mapRelEmbedding (f : α ↪ β) : r ↪r Relation.Map r f f mapRelIso (f : α ≃ β) : r ≃r Relation.Map r f f ``` For a `β`-relation `r` we have: ``` onFunRelHom (f : α → β) : r.onFun f →r r onFunRelEmbedding (f : α ↪ β) : r.onFun f ↪r r onFunRelIso (f : α ≃ β) : r.onFun f ≃r r ``` --- These are pretty similar to `SimpleGraph.{Embedding/Iso}.map` and `SimpleGraph.{Hom/Embedding/Iso}.comap`, as [`comap`](https://github.com/leanprover-community/mathlib4/blob/9268b22206b0425419498769f780a91dee03bcf3/Mathlib/Combinatorics/SimpleGraph/Maps.lean#L117-L118) on graphs is a wrapper around `onFun`, and [`map`](https://github.com/leanprover-community/mathlib4/blob/9268b22206b0425419498769f780a91dee03bcf3/Mathlib/Combinatorics/SimpleGraph/Maps.lean#L57-L58) on graphs is *almost* a wrapper around `Relation.Map`. btw `@[simps]` is angry at me when I try to use it on the structures that use spread syntax. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-order 42/0 Mathlib/Order/RelIso/Basic.lean 1 1 ['github-actions'] nobody
27-63500
27 days ago
27-63575
27 days ago
27-63286
27 days
38344 robo7179
author:robo7179
 feat(SimpleGraph/Coloring/VertexColoring): Matching is 2 colorable --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-combinatorics new-contributor 51/0 Mathlib/Combinatorics/SimpleGraph/Coloring/VertexColoring.lean 1 5 ['SnirBroshi', 'github-actions', 'vlad902'] nobody
27-39423
27 days ago
31-6967
31 days ago
31-7064
31 days
38222 IvanRenison
author:IvanRenison
 feat(Combinatorics/SimpleGraph/Girth): add lemmas about isomorphism and girth --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-combinatorics 19/1 Mathlib/Combinatorics/SimpleGraph/Girth.lean 1 6 ['IvanRenison', 'SnirBroshi', 'github-actions', 'vlad902'] nobody
27-23045
27 days ago
33-84358
33 days ago
33-84069
33 days
38528 SnirBroshi
author:SnirBroshi
 feat(Combinatorics/SimpleGraph/Paths): some cycle lemmas are true for circuits Add `IsCircuit.{not_of_nil,ne_bot,three_le_length}` by using their corresponding `IsCycle` proofs. Also golfs a bit. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-combinatorics 17/9 Mathlib/Combinatorics/SimpleGraph/Paths.lean 1 1 ['github-actions'] nobody
27-21949
27 days ago
27-22019
27 days ago
27-21730
27 days
37959 artie2000
author:artie2000
 feat(LinearAlgebra/Dimension/Free): lemmas about finrank * Division variant of tower law * Isomorphic to base ring iff rank is one --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra awaiting-author
label:t-algebra$
 34/9 Mathlib/LinearAlgebra/Dimension/Free.lean 1 7 ['artie2000', 'github-actions', 'themathqueen'] themathqueen
assignee:themathqueen
26-34850
26 days ago
26-77490
26 days ago
12-62496
12 days
38549 SnirBroshi
author:SnirBroshi
 feat(Combinatorics/SimpleGraph/Copy): `Is(Ind)Contained` `completeGraph` lemmas - `G ⊑ completeGraph V` - `G ⊑ completeGraph W ↔ Nonempty (V ↪ W)` - `completeGraph V ⊴ completeGraph W ↔ Nonempty (V ↪ W)` - `G ⊴ completeGraph W → G = ⊤` --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-combinatorics 12/0 Mathlib/Combinatorics/SimpleGraph/Copy.lean 1 1 ['github-actions'] nobody
26-28524
26 days ago
26-28593
26 days ago
26-28304
26 days
38529 SnirBroshi
author:SnirBroshi
 feat(Combinatorics/SimpleGraph/Girth): `egirth ⊤ = 3` when there are at least 3 vertices Since `Nontrivial` is not enough, we use the condition `3 ≤ ENat.card α`. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-combinatorics 17/0 Mathlib/Combinatorics/SimpleGraph/Girth.lean 1 5 ['SnirBroshi', 'github-actions', 'vlad902'] nobody
26-28467
26 days ago
27-19184
27 days ago
27-18895
27 days
37835 YaelDillies
author:YaelDillies
 doc(Algebra/Order): update mentions of `OrderedSemiring` and friends As of #20676, it was replaced by `IsOrderedRing`. Not all docs were straightforward to update. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra t-order
label:t-algebra$
 123/280 Counterexamples/HomogeneousPrimeNotPrime.lean,Counterexamples/OrderedCancelAddCommMonoidWithBounds.lean,Mathlib/Algebra/Group/Subgroup/Order.lean,Mathlib/Algebra/Group/ULift.lean,Mathlib/Algebra/Order/AddTorsor.lean,Mathlib/Algebra/Order/Floor/Defs.lean,Mathlib/Algebra/Order/Floor/Ring.lean,Mathlib/Algebra/Order/Floor/Semiring.lean,Mathlib/Algebra/Order/Group/Cone.lean,Mathlib/Algebra/Order/Group/Cyclic.lean,Mathlib/Algebra/Order/GroupWithZero/Unbundled/Defs.lean,Mathlib/Algebra/Order/Hom/Monoid.lean,Mathlib/Algebra/Order/Interval/Set/Monoid.lean,Mathlib/Algebra/Order/Monoid/Canonical/Defs.lean,Mathlib/Algebra/Order/Monoid/Unbundled/Defs.lean,Mathlib/Algebra/Order/Monoid/Unbundled/ExistsOfLE.lean,Mathlib/Algebra/Order/Positive/Ring.lean,Mathlib/Algebra/Order/Ring/Basic.lean,Mathlib/Algebra/Order/Ring/Defs.lean,Mathlib/Algebra/Order/Ring/Unbundled/Basic.lean,Mathlib/Algebra/Order/Star/Basic.lean,Mathlib/Algebra/Order/Sub/WithTop.lean,Mathlib/Algebra/Order/ToIntervalMod.lean,Mathlib/Algebra/Order/WithTop/Untop0.lean,Mathlib/Combinatorics/Pigeonhole.lean,Mathlib/Data/Finsupp/Weight.lean,Mathlib/Data/NNReal/Defs.lean,Mathlib/Data/Nat/Cast/Order/Basic.lean,Mathlib/Data/Nat/Cast/Order/Ring.lean,Mathlib/MeasureTheory/Function/LpOrder.lean,Mathlib/MeasureTheory/Measure/Typeclasses/Finite.lean,Mathlib/Order/Filter/Germ/OrderedMonoid.lean,Mathlib/RingTheory/GradedAlgebra/Radical.lean,Mathlib/RingTheory/HahnSeries/PowerSeries.lean,Mathlib/RingTheory/HahnSeries/Valuation.lean,Mathlib/RingTheory/MvPolynomial/WeightedHomogeneous.lean,Mathlib/Tactic/NormNum/Ineq.lean 37 9 ['NoahW314', 'SnirBroshi', 'github-actions', 'mathlib-merge-conflicts'] nobody
26-20403
26 days ago
26-20428
26 days ago
41-15273
41 days
38032 grunweg
author:grunweg
 perf: unbundle algebra from `ENormed*`, April 2026 version Up-to-date version of #28803. Don't merge yet! --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) WIP merge-conflict 81/78 Mathlib/Analysis/Normed/Group/Basic.lean,Mathlib/Analysis/Normed/Group/Continuity.lean,Mathlib/Analysis/Normed/Group/Defs.lean,Mathlib/Analysis/Normed/Group/Indicator.lean,Mathlib/Analysis/Normed/Group/InfiniteSum.lean,Mathlib/Analysis/Normed/Group/Real.lean,Mathlib/MeasureTheory/Function/L1Space/AEEqFun.lean,Mathlib/MeasureTheory/Function/L1Space/HasFiniteIntegral.lean,Mathlib/MeasureTheory/Function/L1Space/Integrable.lean,Mathlib/MeasureTheory/Function/LocallyIntegrable.lean,Mathlib/MeasureTheory/Function/LpSeminorm/Basic.lean,Mathlib/MeasureTheory/Function/LpSeminorm/CompareExp.lean,Mathlib/MeasureTheory/Function/LpSeminorm/Indicator.lean,Mathlib/MeasureTheory/Function/LpSeminorm/Monotonicity.lean,Mathlib/MeasureTheory/Function/LpSeminorm/SMul.lean,Mathlib/MeasureTheory/Function/LpSeminorm/TriangleInequality.lean,Mathlib/MeasureTheory/Integral/IntegrableOn.lean,Mathlib/MeasureTheory/Integral/IntervalIntegral/Basic.lean,Mathlib/MeasureTheory/VectorMeasure/Variation/Basic.lean,Mathlib/MeasureTheory/VectorMeasure/Variation/Defs.lean 20 6 ['github-actions', 'grunweg', 'leanprover-radar', 'mathlib-merge-conflicts'] nobody
26-11386
26 days ago
38-45881
38 days ago
0-9
9 seconds
38193 Jun2M
author:Jun2M
 feat(Topology/Algebra/InfiniteSum): Deprecate generalized ENNReal lemmas Following the PR #38489, this PR add deprecated tags to the original `ENNReal` lemmas and change the transitive children files to use the generalized lemmas rather than the deprecated lemmas. Related Zulip thread: [#Is there code for X? > Summing `ENat`s without topology](https://leanprover.zulipchat.com/#narrow/channel/217875-Is-there-code-for-X.3F/topic/Summing.20.60ENat.60s.20without.20topology/with/588756615) --- - [ ] depends on: #38489 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) blocked-by-other-PR merge-conflict 483/329 Mathlib/Algebra/Order/AddGroupWithTop.lean,Mathlib/Analysis/Normed/Group/InfiniteSum.lean,Mathlib/Analysis/PSeries.lean,Mathlib/Analysis/SpecificLimits/Basic.lean,Mathlib/MeasureTheory/Constructions/BorelSpace/Real.lean,Mathlib/MeasureTheory/Covering/Besicovitch.lean,Mathlib/MeasureTheory/Covering/Differentiation.lean,Mathlib/MeasureTheory/Covering/Vitali.lean,Mathlib/MeasureTheory/Function/AEMeasurableOrder.lean,Mathlib/MeasureTheory/Function/ConvergenceInMeasure.lean,Mathlib/MeasureTheory/Function/Egorov.lean,Mathlib/MeasureTheory/Function/Jacobian.lean,Mathlib/MeasureTheory/Function/LpSpace/Complete.lean,Mathlib/MeasureTheory/Function/SimpleFunc.lean,Mathlib/MeasureTheory/Integral/Bochner/VitaliCaratheodory.lean,Mathlib/MeasureTheory/Integral/Lebesgue/Add.lean,Mathlib/MeasureTheory/Integral/Lebesgue/Basic.lean,Mathlib/MeasureTheory/Integral/Lebesgue/Countable.lean,Mathlib/MeasureTheory/Measure/AbsolutelyContinuous.lean,Mathlib/MeasureTheory/Measure/AddContent.lean,Mathlib/MeasureTheory/Measure/Content.lean,Mathlib/MeasureTheory/Measure/Count.lean,Mathlib/MeasureTheory/Measure/Hausdorff.lean,Mathlib/MeasureTheory/Measure/MeasureSpace.lean,Mathlib/MeasureTheory/Measure/MeasuredSets.lean,Mathlib/MeasureTheory/Measure/MutuallySingular.lean,Mathlib/MeasureTheory/Measure/PreVariation.lean,Mathlib/MeasureTheory/Measure/Regular.lean,Mathlib/MeasureTheory/Measure/RegularityCompacts.lean,Mathlib/MeasureTheory/Measure/Restrict.lean,Mathlib/MeasureTheory/Measure/Stieltjes.lean,Mathlib/MeasureTheory/Measure/Tight.lean,Mathlib/MeasureTheory/Measure/Typeclasses/SFinite.lean,Mathlib/MeasureTheory/Measure/WithDensity.lean,Mathlib/MeasureTheory/OuterMeasure/Caratheodory.lean,Mathlib/MeasureTheory/OuterMeasure/Induced.lean,Mathlib/MeasureTheory/OuterMeasure/OfAddContent.lean,Mathlib/MeasureTheory/OuterMeasure/OfFunction.lean,Mathlib/MeasureTheory/OuterMeasure/Operations.lean,Mathlib/MeasureTheory/VectorMeasure/Basic.lean,Mathlib/NumberTheory/Transcendental/Liouville/Measure.lean,Mathlib/Probability/Distributions/Uniform.lean,Mathlib/Probability/Kernel/Defs.lean,Mathlib/Probability/Kernel/WithDensity.lean,Mathlib/Probability/ProbabilityMassFunction/Basic.lean,Mathlib/Probability/ProbabilityMassFunction/Constructions.lean,Mathlib/Probability/ProbabilityMassFunction/Monad.lean,Mathlib/Probability/Process/LocalProperty.lean,Mathlib/Topology/Algebra/InfiniteSum/ENNReal.lean,Mathlib/Topology/Algebra/InfiniteSum/Order.lean,Mathlib/Topology/MetricSpace/PiNat.lean,Mathlib/Topology/Semicontinuity/Basic.lean 52 4 ['SnirBroshi', 'github-actions', 'mathlib-dependent-issues', 'mathlib-merge-conflicts'] nobody
26-11382
26 days ago
27-78426
27 days ago
6-13863
6 days
38546 yhx-12243
author:yhx-12243
 fix: universe issue in injective module Change the definition of ```lean class Module.Injective : Prop where out : ∀ ⦃X Y : Type v⦄ [AddCommGroup X] [AddCommGroup Y] [Module R X] [Module R Y] (f : X →ₗ[R] Y) (_ : Function.Injective f) (g : X →ₗ[R] Q), ∃ h : Y →ₗ[R] Q, ∀ x, h (f x) = g x ``` into ```lean class Module.Injective : Prop where out : ∀ ⦃X Y : Type u⦄ [AddCommGroup X] [AddCommGroup Y] [Module R X] [Module R Y] (f : X →ₗ[R] Y) (_ : Function.Injective f) (g : X →ₗ[R] Q), ∃ h : Y →ₗ[R] Q, ∀ x, h (f x) = g x ``` to make it agree with `Module.Baer` and real mathematical definition, **without universe issues**. Since the criterion `Module.Flat` also uses `Type u` on testing modules. See discussions in https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/Universe.20issue.20about.20injective.20module . --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra new-contributor awaiting-zulip
label:t-algebra$
 57/43 Mathlib/Algebra/Category/ModuleCat/Injective.lean,Mathlib/Algebra/Category/ModuleCat/Ulift.lean,Mathlib/Algebra/Module/Injective.lean,Mathlib/RepresentationTheory/FinGroupCharZero.lean,Mathlib/RingTheory/Flat/Tensor.lean,Mathlib/RingTheory/LocalProperties/Injective.lean 6 5 ['github-actions', 'grunweg', 'mathlib-bors', 'wwylele'] nobody
26-3858
26 days ago
26-3869
26 days ago
0-26133
7 hours
36850 whocares-abt
author:whocares-abt
 feat(Combinatorics/SimpleGraph/Acyclic): deleting leaves from a tree gives a tree Added theorem stating Deleting a leaf from a tree produces a tree. t-combinatorics new-contributor awaiting-author 5/0 Mathlib/Combinatorics/SimpleGraph/Acyclic.lean 1 9 ['YaelDillies', 'github-actions', 'vlad902'] YaelDillies
assignee:YaelDillies
25-48438
25 days ago
25-48548
25 days ago
38-73648
38 days
38482 dagurtomas
author:dagurtomas
 feat(CategoryTheory/Tactic): specialize_map attribute --- - [ ] depends on: #38478 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) WIP LLM-generated t-category-theory t-meta blocked-by-other-PR 861/0 Mathlib.lean,Mathlib/Tactic.lean,Mathlib/Tactic/CategoryTheory/Map.lean,Mathlib/Tactic/CategoryTheory/Op.lean,Mathlib/Tactic/CategoryTheory/SpecializeMap.lean,MathlibTest/CategoryTheory/Map.lean,MathlibTest/CategoryTheory/MapSimp.lean,MathlibTest/CategoryTheory/Op.lean,MathlibTest/CategoryTheory/SpecializeMap.lean 9 2 ['github-actions', 'mathlib-dependent-issues'] nobody
25-23665
25 days ago
28-7280
28 days ago
0-15
15 seconds
38567 dagurtomas
author:dagurtomas
 feat(CategoryTheory/Monoidal): autogenerate some lemmas instead of stating them explicitly --- - [ ] depends on: #38482 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) blocked-by-other-PR 928/166 Mathlib.lean,Mathlib/CategoryTheory/Monoidal/Limits/HasLimits.lean,Mathlib/CategoryTheory/Monoidal/Limits/Shapes/Pullback.lean,Mathlib/CategoryTheory/Monoidal/PushoutProduct.lean,Mathlib/Tactic.lean,Mathlib/Tactic/CategoryTheory/Map.lean,Mathlib/Tactic/CategoryTheory/Op.lean,Mathlib/Tactic/CategoryTheory/SpecializeMap.lean,MathlibTest/CategoryTheory/Map.lean,MathlibTest/CategoryTheory/MapSimp.lean,MathlibTest/CategoryTheory/Op.lean,MathlibTest/CategoryTheory/SpecializeMap.lean 12 2 ['github-actions', 'mathlib-dependent-issues'] nobody
25-23468
25 days ago
25-61959
25 days ago
0-512
8 minutes
37774 weisbrja
author:weisbrja
 fix: change variables in `bicompl` to `Sort*` and add missing theorem mentioned in `bicompl` docs [#mathlib4 > Why does Mathlib use Type* instead of Sort* in some places?](https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/Why.20does.20Mathlib.20use.20Type.2A.20instead.20of.20Sort.2A.20in.20some.20places.3F/with/583882342) --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor t-logic merge-conflict 6/1 Mathlib/Logic/Function/Basic.lean 1 8 ['github-actions', 'kbuzzard', 'leanprover-radar', 'mathlib-merge-conflicts', 'weisbrja'] nobody
25-11565
25 days ago
25-11566
25 days ago
19-76858
19 days
37910 wwylele
author:wwylele
 feat(Geometry/Euclidean): volume of a simplex This defines the volume of a simplex in Euclidean geometry, and shows that it agrees with measure theory. It also adds the basic set of lemmas (base-and-height formula, reindex, positivity, map, and restrict). Further properties of the volume will be in future PRs. Three new file s are introduced and organized in the following dependency chain: Def.lean -> MeasureSimplex.Lean -> Basic.lean The Def.lean file has the definition only. MeasureSimplex.lean pulls in measure theory. Basic.lean publicly imports Def.lean, and privately imports MeasureSimplex.lean. When a downstream file imports Basic.lean, the measure theory part is not exposed and all properties of the volume is provided. --- - [ ] depends on: #36018 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) blocked-by-other-PR merge-conflict 614/0 Mathlib.lean,Mathlib/Geometry/Euclidean/Volume/Basic.lean,Mathlib/Geometry/Euclidean/Volume/Def.lean,Mathlib/Geometry/Euclidean/Volume/MeasureSimplex.lean,Mathlib/LinearAlgebra/AffineSpace/AffineSubspace/Shift.lean,Mathlib/LinearAlgebra/AffineSpace/Simplex/Basic.lean 6 3 ['github-actions', 'mathlib-dependent-issues', 'mathlib-merge-conflicts'] nobody
25-11564
25 days ago
41-83943
41 days ago
0-473
7 minutes
38554 YaelDillies
author:YaelDillies
 chore(Combinatorics/SimpleGraph): use the auto-param in `loopless` more --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-combinatorics 5/13 Mathlib/Combinatorics/Digraph/Orientation.lean,Mathlib/Combinatorics/SimpleGraph/AdjMatrix.lean,Mathlib/Combinatorics/SimpleGraph/Basic.lean,Mathlib/Combinatorics/SimpleGraph/Hasse.lean,Mathlib/Combinatorics/SimpleGraph/Maps.lean,Mathlib/Combinatorics/SimpleGraph/Prod.lean,Mathlib/Combinatorics/SimpleGraph/Regularity/Uniform.lean,Mathlib/Order/Cover.lean 8 6 ['SnirBroshi', 'YaelDillies', 'github-actions'] nobody
25-9023
25 days ago
25-41364
25 days ago
25-43144
25 days
38588 thorimur
author:thorimur
 perf: use declaration range internals in unused instances in type linters --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-linter large-import 57/41 Mathlib/Order/Basic.lean,Mathlib/Tactic/Linter/UnusedInstancesInType.lean,MathlibTest/UnusedInstancesInType/Decidable.lean 3 3 ['github-actions', 'leanprover-radar', 'thorimur'] nobody
24-85737
24 days ago
unknown
0-0
0 seconds
37445 edwin1729
author:edwin1729
 feat(Topology/Order): set of compact elements, generating basic opens contained in a `Locale.PT`, is directed This is (2/4) PRs culminating in a proof that "Scott Topologies over Algebraic DCPOs are Sober". In this PR we prove properties of a certain set of compact elements, w.r.t a `Locale.PT`. A `Locale.PT` can be thought of as a set of `Opens`. Precisely it is a Frame homomorphism from `Opens _` to `Prop` so we are essentially choosing certain `Opens` to form our set and this set has additional properties. Namely it is a completely prime filter: if the supremum of some Opens is contained than atleast one of the Opens must be contained. Take some `Locale.PT`, `x`. In this PR, we prove that the set of compact elements generating basic opens (compact elements generate topological basis see #31662) contained in `x` is directed. This set of compact elements defined above is important in subsequent parts of the proof since it fully determines `x`. - [ ] depends on: #31662 --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-topology blocked-by-other-PR new-contributor merge-conflict 296/1 Mathlib.lean,Mathlib/Topology/Order/ScottTopology.lean,Mathlib/Topology/Order/ScottTopologyDCPO.lean,docs/references.bib 4 4 ['github-actions', 'mathlib-dependent-issues', 'mathlib-merge-conflicts'] nobody
24-80887
24 days ago
52-18965
52 days ago
0-463
7 minutes
37556 edwin1729
author:edwin1729
 feat(Topology/Order): Locale.localePointOfSpacePoint if we have a Scott Topology from an Algebraic DCPO (3/4) in a series of PRs proving that "Scott Topologies over Algebraic DCPOs are Sober" We prove here that the unit of the adjunction from `TopCat` to `Locale` defined in `Topology/Order/Category/FrameAdjunction.lean` is a surjective mapping, under the following condition: The underlying TopologicalSpace must be a Scott Topology generated with an underlying Algebraic DCPO structure. - [ ] depends on: #37445 --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-topology new-contributor blocked-by-other-PR merge-conflict 393/1 Mathlib.lean,Mathlib/Topology/Order/ScottTopology.lean,Mathlib/Topology/Order/ScottTopologyDCPO.lean,docs/references.bib 4 5 ['github-actions', 'mathlib-dependent-issues', 'mathlib-merge-conflicts'] nobody
24-80886
24 days ago
50-18986
50 days ago
0-1300
21 minutes
38077 b-mehta
author:b-mehta
 feat(Combinatorics/Schnirelmann): prove Mann's theorem Lots of this was done in 2024, and so it needs heavy cleaning. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) WIP t-combinatorics large-import merge-conflict 632/12 Mathlib/Algebra/Group/Action/Pointwise/Finset.lean,Mathlib/Algebra/Group/Action/Pointwise/Set/Basic.lean,Mathlib/Algebra/Group/Action/Pointwise/Set/Finite.lean,Mathlib/Algebra/GroupWithZero/Action/Pointwise/Finset.lean,Mathlib/Combinatorics/Schnirelmann.lean,Mathlib/Data/Finset/Card.lean,Mathlib/Data/Fintype/Perm.lean,Mathlib/Data/Set/Finite/Lemmas.lean 8 3 ['github-actions', 'mathlib-merge-conflicts'] nobody
24-80761
24 days ago
unknown
0-0
0 seconds
38027 8e7
author:8e7
 feat(Combinatorics/SimpleGraph/Star): define star graphs Add a new definition `starGraph` and several key lemmas. Star graphs are a trivial class of tree, often used in constructive proofs regarding trees. An example use case is shown in #38334. --- All lemmas are hand written first, then golfed with the help of Claude Code. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-combinatorics new-contributor 85/0 Mathlib.lean,Mathlib/Combinatorics/SimpleGraph/Star.lean 2 39 ['8e7', 'IvanRenison', 'JovanGerb', 'SnirBroshi', 'github-actions', 'vihdzp', 'vlad902'] nobody
24-67416
24 days ago
36-67362
36 days ago
38-65338
38 days
38580 mcdoll
author:mcdoll
 perf(Polynomial/HasseDeriv): explicit type annotations for `compHom` --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra
label:t-algebra$
 4/4 Mathlib/Algebra/Polynomial/HasseDeriv.lean 1 4 ['github-actions', 'leanprover-radar', 'mcdoll'] nobody
24-65037
24 days ago
unknown
0-0
0 seconds
38560 Deicyde
author:Deicyde
 feat(Geometry/Manifold): `MfldCat` is a `CartesianMonoidalCategory` We prove that the category `MfldCat` of C^n manifolds is a Cartesian monoidal category, and also derive the `BraidedCategory` instance. This PR introduces a new file `Geometry/Manifold/Category/MfldCat/CartesianMonoidal` closely mirroring the structure of `Algebra/Category/Grp/CartesianMonoidal.lean` --- - [ ] depends on: #38223 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-differential-geometry blocked-by-other-PR new-contributor 281/0 Mathlib.lean,Mathlib/Geometry/Manifold/Category/MfldCat/Basic.lean,Mathlib/Geometry/Manifold/Category/MfldCat/CartesianMonoidal.lean,Mathlib/Geometry/Manifold/ContMDiffMap.lean 4 3 ['github-actions', 'mathlib-dependent-issues'] nobody
24-54132
24 days ago
unknown
0-0
0 seconds
38621 mariainesdff
author:mariainesdff
 feat(Algebra/SkewPolynomial/Basic): add more API We add API for SkewPolynomial, including the definitions erase and update and results about coefficients and supports. Co-authored by: @xgenereux. --- - [ ] depends on: #38619 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra blocked-by-other-PR
label:t-algebra$
 629/24 Mathlib/Algebra/SkewPolynomial/Basic.lean 1 2 ['github-actions', 'mathlib-dependent-issues'] nobody
24-41767
24 days ago
24-41768
24 days ago
0-1715
28 minutes
38623 mariainesdff
author:mariainesdff
 WIP --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) WIP t-algebra
label:t-algebra$
 44/2 Mathlib/Algebra/Order/Antidiag/Prod.lean 1 2 ['github-actions'] nobody
24-40613
24 days ago
24-40670
24 days ago
0-17
17 seconds
37861 Jun2M
author:Jun2M
 feat(Combinatorics/Graph): connected graphs This PR introduces - `IsConnectedComponentOf`, a graph is a connected component of another graph, and - `IsConnected`, a graph is a self component Under this definition, an empty graph is not connected. Co-authored-by: Peter Nelson [apn.uni@gmail.com](mailto:apn.uni@gmail.com) --- - [x] depends on: #37610 - [ ] depends on: #36756 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-combinatorics blocked-by-other-PR 92/0 Mathlib.lean,Mathlib/Combinatorics/Graph/Connected/Component.lean 2 6 ['Jun2M', 'SnirBroshi', 'YaelDillies', 'github-actions', 'mathlib-dependent-issues'] nobody
24-9015
24 days ago
35-24784
35 days ago
3-10047
3 days
37067 kbuzzard
author:kbuzzard
 feat: add_group tactic Written by Claude Code, additivising the `group` tactic, although there were some problems which needed human input. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) This is me burning Claude credits as a result of this comment [#mathlib4 > MulAut and to_additive @ 💬](https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/MulAut.20and.20to_additive/near/581059625) . Just to be clear, all comments below are human-written by me with 0 AI assistance. To my amusement, naively additivising the `group` tactic to make an `add_group` tactic does not work. The problem is that the algorithm run by `group` involves adding `← zpow_neg_one` to the simp set, which rewrites `x⁻¹` to `x ^ (-1)` for `x` in any group: the idea is that `x ^ (z : Int)` is preferred in the algorithm and `x⁻¹` is eliminated. Amusingly, when additivised, this becomes `-x -> -1 • x` which then immediately becomes `(-1 • 1) • x` which then becomes `((-1 • 1) • 1) • x` etc etc, as the integers are themselves an additive group. So we need to find another way of normalising terms of the form `-x`. Claude found the following trick: drop `← neg_one_zsmul` and `neg_one_zsmul_add`, and use `neg_add_rev` and `neg_zero` to reduce `-(a+b)` and `-0`, use `zsmul_neg` to reduce `n • (-a)` to `(-n) • a` and then use things like `add_neg_cancel_right` and `neg_add_cancel_right` to do `-b + b` and `b + -b` together with some new `zsmul_neg_trick` lemmas which normalise `(n • b) + -b` to `(n - 1) • b`. etc. The idea is to ensure that any consecutive chains of `b`'s and `-b`'s and `z • b`'s will now all get amalgamated into something of the form `z • b`, but we cannot change `-b` to `-1 • b` so have to try harder than in the multiplicative case. Here is a detailed (human-written!) explanation of the difference between `Tactic/AddGroup.lean` and the additivisation of `Tactic/Group.Lean`. 1) Note that the `zpow_trick` lemmas in `Tactic/Group.lean` are additivised, so we import `Group.lean` in `AddGroup.lean` to access these additivised lemmas. 2) `Mathlib.Algebra.Group.Commutator` has no additive version (and it's not clear that it should have one), so we don't use an additive version of `commutatorElement_def` (which expands `⁅g₁, g₂⁆` to `g₁ * g₂ * g₁⁻¹ * g₂⁻¹`). Note: that means that we cannot additivise a test. 3) Line 67 of the additive file uses `neg_add_rev, neg_zero, zsmul_neg, ← neg_zsmul,` as a workaround for the looping ` ← zpow_neg_one`. 4) `Int.mul_neg, Int.neg_mul` are dropped (they don't seem to be needed, all tests are passing, ring_nf is probably doing this.) 5) `sub_eq_add_neg` is added: people use subtraction in additive groups; division doesn't seem to be covered for multiplicative groups? So `add_group` can solve `a + b - b = a` but `group` cannot solve `a * b / b = a`. *** There is also one fewer test in the `add_group` tests, as I had to remove the commutator test. I don't know much at all about tactic-writing, the PR is all Claude code, but a lot of it is to_additive copypasta. The review of the code above is my own. t-meta LLM-generated awaiting-author 189/0 Mathlib.lean,Mathlib/Tactic.lean,Mathlib/Tactic/AddGroup.lean,MathlibTest/AddGroup.lean 4 21 ['JovanGerb', 'SnirBroshi', 'github-actions', 'kbuzzard', 'mathlib-merge-conflicts', 'thorimur'] thorimur
assignee:thorimur
24-4531
24 days ago
27-67627
27 days ago
28-31880
28 days
38364 openendings
author:openendings
 feat: create Order/DirectedCompletePartialOrder/Defs.lean Define DirectedCompletePartialOrder and its interaction with iSup and sSup. --- A DirectedCompletePartialOrder is equivalently: - a partial order with LUBs of nonempty directed sets; - what happens when you remove ⊥ from a CompletePartialOrder; or - a ConditionallyCompletePartialOrder in which every directed set is BddAbove. Like CPOs, DCPOs are commonly studied in denotational semantics. Potential applications: - [#Is there code for X? > Summing `ENat`s without topology](https://leanprover.zulipchat.com/#narrow/channel/217875-Is-there-code-for-X.3F/topic/Summing.20.60ENat.60s.20without.20topology/with/590070848) -- defining infinite sums in an DCPO-enriched `AddCommMonoidWithTop` such as `ENat` or `ENNReal`. - [#Is there code for X? > Scott Induction](https://leanprover.zulipchat.com/#narrow/channel/217875-Is-there-code-for-X.3F/topic/Scott.20Induction/with/590112858) -- fixpoint theorems similar to `OmegaCompletePartialOrder`, generalised to arbitrary cardinalities. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-order new-contributor 123/0 Mathlib.lean,Mathlib/Order/DirectedCompletePartialOrder/Defs.lean,docs/references.bib 3 4 ['SnirBroshi', 'github-actions', 'openendings'] nobody
23-83679
23 days ago
29-73799
29 days ago
30-48336
30 days
36681 SnirBroshi
author:SnirBroshi
 feat(SetTheory/Ordinal/Commute): the smallest nonzero ordinal that add-commutes with a given ordinal For any ordinal `o`, `(ω ^ log ω o) + o % (ω ^ log ω o)` is the smallest nonzero ordinal that add-commutes with `o`. This value can also be calculated by considering the CNF of `o` with base `ω` and changing the first coefficient to `1`. --- The proofs involve annoying algebraic manipulations (to annihilate the tails as explained below), golfs welcome.
Details on the math involved Think about the Cantor-normal form: #36664 shows `AddCommute o₁ o₂ ↔ ∃ (o : Ordinal) (n₁ n₂ : ℕ), o * n₁ = o₁ ∧ o * n₂ = o₂`. If you write a given ordinal `o` in CNF in base `ω` as `(ω ^ e₀) * c₀ + (ω ^ e₁) * c₁ + ...` then `o * n = (ω ^ e₀) * (c₀ * n) + (ω ^ e₁) * c₁ + ...`. Notice that only the leading term got multiplied by `n`, because the earlier copies of `o` annihilate all the tails except for the last one (e.g. `o * 2 = o + o = (ω ^ e₀) * c₀ + tail + (ω ^ e₀) * c₀ + tail = (ω ^ e₀) * c₀ + (ω ^ e₀) * c₀ + tail = (ω ^ e₀) * (c₀ * 2) + tail`). So given the characterization of `AddCommute`, if we keep the tail and remove the `* c₀` from the leading coefficient (effectively calculating `o / c₀`, we'll get the smallest ordinal that we can multiply by a natural number to get `o`. `o / (o / (ω ^ log ω o))` should also give the same smallest ordinal (and `o - (ω ^ log ω o) * (o / (ω ^ log ω o) - 1)`), but I chose the expression that fits the existing CNF definitions. Maybe a future PR can show they're all equal.
- [x] depends on: #36664 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) 		t-set-theory awaiting-author 71/1 Mathlib/SetTheory/Ordinal/Commute.lean,Mathlib/SetTheory/Ordinal/Principal.lean 2 25 ['SnirBroshi', 'github-actions', 'mathlib-dependent-issues', 'mathlib-merge-conflicts', 'vihdzp'] vihdzp
assignee:vihdzp
23-75393
23 days ago
23-75393
23 days ago
6-8534
6 days
37073 kim-em
author:kim-em
 feat: add wrap_instance% using core's wrapInstance This PR adds a new `wrap_instance%` term elaborator that delegates to Lean core's `wrapInstance` (from https://github.com/leanprover/lean4/pull/12897), and replaces ~53 `fast_instance%` call sites where the replacement is safe. `wrap_instance%` is a thin wrapper (~15 lines) around `Lean.Meta.wrapInstance`. Like `fast_instance%`, it reduces instances to constructor applications and reuses canonical sub-instances. Unlike `fast_instance%`, it works at `instances` transparency and delegates all normalization logic to core. The replaced sites cover: - Equiv/type-alias transfers (WithAbs, WithConv, WithVal, WithLp, TransferInstance) - Surjective constructors (Con, RingCon quotients, module congruences) - DFunLike leaf instances (MultilinearMap, ContinuousMultilinearMap, AlternatingMap, Intertwining) - Quotient instances (LinearAlgebra/Quotient/Defs) - inferInstanceAs% sites (StandardPart, Presentation/Core) - Miscellaneous (InfiniteAdeleRing, ZMod) This PR *doesn't* attempt to replace all `fast_instance%`; it gets more complicated! 🤖 Prepared with Claude Code 88/59 Mathlib/Algebra/Algebra/TransferInstance.lean,Mathlib/Algebra/Module/Congruence/Defs.lean,Mathlib/Algebra/WithConv.lean,Mathlib/Analysis/Normed/Lp/WithLp.lean,Mathlib/Analysis/Normed/Ring/WithAbs.lean,Mathlib/Data/ZMod/Basic.lean,Mathlib/GroupTheory/Congruence/Defs.lean,Mathlib/LinearAlgebra/Alternating/Basic.lean,Mathlib/LinearAlgebra/Multilinear/Basic.lean,Mathlib/LinearAlgebra/Quotient/Defs.lean,Mathlib/RepresentationTheory/Intertwining.lean,Mathlib/RingTheory/Extension/Presentation/Core.lean,Mathlib/Tactic/FastInstance.lean,Mathlib/Topology/Algebra/Module/Alternating/Basic.lean,Mathlib/Topology/Algebra/Module/Multilinear/Basic.lean,Mathlib/Topology/Algebra/Valued/WithVal.lean 16 7 ['JovanGerb', 'github-actions', 'kim-em', 'leanprover-radar', 'mathlib-merge-conflicts'] nobody
23-67940
23 days ago
23-67967
23 days ago
26-54786
26 days
37814 sglasman
author:sglasman
 feat: Equivalence between HopfAlgCat R and Hopf (ModuleCat R) This PR resolves a TODO by demonstrating an equivalence of categories between two models of the category of Hopf algebras over a commutative ring R, that of Hopf objects in the module category of R and that of types with a `HopfAlgebra R` instance. --- AI declaration: I consulted with Claude on proof strategies. The proofs were ultimately written by me. new-contributor large-import t-category-theory WIP 214/4 Mathlib/CategoryTheory/Monoidal/Hopf_.lean,Mathlib/RingTheory/HopfAlgebra/Basic.lean 2 5 ['dagurtomas', 'github-actions', 'robin-carlier', 'sglasman'] kim-em
assignee:kim-em
23-58650
23 days ago
29-21113
29 days ago
14-69757
14 days
38432 SnirBroshi
author:SnirBroshi
 feat(Logic/Relation): `Map r f g ≤ s ↔ r ≤ s.bicompl f g` and the dual `s ≤ Relation.Map r f g ↔ s.bicompl f g ≤ r` which requires `f` and `g` to be bijective. Adds `Galois{Connection/Insertion/Coinsertion}` for the dual. The theorems are specialized to `onFun` instead of `bicompl` for when `f = g`. The `≤` theorems are spelled using `Subrelation` since `≤` is not yet available in this file, and `∀` for the `bicompl` theorems since `Subrelation` only supports homogeneous relations. A `GaloisConnection` for the iff in the title requires `f`/`g` to be bijective, but then we can get an `OrderIso` which is stronger (see #38499). --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-logic 119/28 Mathlib/Logic/Relation.lean,Mathlib/Order/GaloisConnection/Basic.lean 2 3 ['SnirBroshi', 'github-actions', 'plp127'] nobody
23-54687
23 days ago
27-61900
27 days ago
28-83033
28 days
38612 SnirBroshi
author:SnirBroshi
 feat(Order/SuccPred/CompleteLinearOrder): `sSup s < x` iff theorems when we know if `x` is a successor pre-limit or not Adds the following theorems (along with their duals and indexed versions): ```lean sSup_lt_iff_of_not_isSuccPrelimit : ¬IsSuccPrelimit x → sSup s < x ↔ ∀ a ∈ s, a < x le_sSup_iff_of_not_isSuccPrelimit : ¬IsSuccPrelimit x → x ≤ sSup s ↔ ∃ a ∈ s, x ≤ a Order.IsSuccPrelimit.sSup_lt_iff : IsSuccPrelimit x → sSup s < x ↔ ∃ a < x, ∀ b ∈ s, b < a Order.IsSuccPrelimit.le_sSup_iff : IsSuccPrelimit x → x ≤ sSup s ↔ ∀ a < x, ∃ b ∈ s, a ≤ b ``` They are similar to these existing theorems, but not the same: ```lean sSup_lt_iff : sSup s < x ↔ ∃ a < x, ∀ b ∈ s, b ≤ a le_sSup_iff_forall_lt : x ≤ sSup s ↔ ∀ a < x, ∃ b ∈ s, a < b ``` --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-order 43/0 Mathlib/Order/SuccPred/CompleteLinearOrder.lean 1 6 ['SnirBroshi', 'github-actions', 'vihdzp'] nobody
23-54488
23 days ago
24-51402
24 days ago
24-51113
24 days
37346 euprunin
author:euprunin
 chore: golf using `grind` The goal of this PR is to decrease the number of times lemmas are called explicitly. Any decrease in compilation time is a welcome side effect, although it is not a primary objective. Trace profiling results (differences <30 ms considered measurement noise): * `✅️ SimpleGraph.Walk.IsPath.getVert_injOn`: unchanged 🎉 * `✅️ SimpleGraph.Walk.length_bypass_le`: unchanged 🎉 * `✅️ Rat.floor_intCast_div_natCast`: unchanged 🎉 * `✅️ InnerProductGeometry.norm_eq_of_angle_sub_eq_angle_sub_rev_of_angle_ne_pi`: unchanged 🎉 * `✅️ padicNorm.zero_of_padicNorm_eq_zero`: unchanged 🎉 Profiled using `set_option trace.profiler true in`. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) maintainer-merge awaiting-zulip 7/45 Mathlib/Combinatorics/SimpleGraph/Paths.lean,Mathlib/Data/Rat/Floor.lean,Mathlib/Geometry/Euclidean/Triangle.lean,Mathlib/NumberTheory/Padics/PadicNorm.lean 4 22 ['FernandoChu', 'bryangingechen', 'chenson2018', 'euprunin', 'faenuccio', 'github-actions', 'grunweg'] nobody
23-36082
23 days ago
23-36113
23 days ago
30-49603
30 days
33485 AntoineChambert-Loir
author:AntoineChambert-Loir
 feat(LinearAlgebra/Transvection/Generation): prove the third part of Dieudonné's theorem Prove the third part of Dieudonné's theorem : if `e : V ≃ₗ[K] V` is a product of `finrank K (V ⧸ e.fixedSubmodule) - 1` transvections and one dilatransvection, then it is not exceptional. Actually, we prove something slightly stronger : if `e : V ≃ₗ[K] V` is a product of a transvection and of `finrank K (V ⧸ e.fixedSubmodule) - 1` dilatransvections, then it is not exceptional. --- - [ ] depends on: #33347 - [ ] depends on: #33348 - [ ] depends on: #33387 - [ ] depends on: #33282 - [ ] depends on: #33392 - [ ] depends on: #33402 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra blocked-by-other-PR
label:t-algebra$
 1122/16 Mathlib.lean,Mathlib/LinearAlgebra/Center.lean,Mathlib/LinearAlgebra/LinearIndependent/Lemmas.lean,Mathlib/LinearAlgebra/Projectivization/Action.lean,Mathlib/LinearAlgebra/Transvection/Basic.lean,Mathlib/LinearAlgebra/Transvection/Generation.lean 6 13 ['AntoineChambert-Loir', 'github-actions', 'mathlib-merge-conflicts', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
23-4289
23 days ago
140-35890
140 days ago
0-955
15 minutes
33560 AntoineChambert-Loir
author:AntoineChambert-Loir
 feat(LinearAlgebra/Transvection/Generation): a linear equivalence is the product of dilatransvections Prove that a linear equivalence `e` is the product of `V ⧸ e.fixedSubmodule` dilatransvections. (It cannot be a product of less.) --- - [ ] depends on: #33347 - [ ] depends on: #33348 - [ ] depends on: #33387 - [ ] depends on: #33282 - [ ] depends on: #33392 - [ ] depends on: #33402 - [ ] depends on: #33485 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra blocked-by-other-PR
label:t-algebra$
 1222/3 Mathlib.lean,Mathlib/LinearAlgebra/Center.lean,Mathlib/LinearAlgebra/LinearIndependent/Lemmas.lean,Mathlib/LinearAlgebra/Projectivization/Action.lean,Mathlib/LinearAlgebra/Transvection/Basic.lean,Mathlib/LinearAlgebra/Transvection/Generation.lean 6 12 ['AntoineChambert-Loir', 'github-actions', 'mathlib-merge-conflicts', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
23-3974
23 days ago
137-80111
137 days ago
0-1282
21 minutes
36701 kim-em
author:kim-em
 feat(DefEqAbuse): detect and report leaky instance binder types This PR adds `#check_instance` and `checkInstance` to `Mathlib/Tactic/FastInstance.lean` to diagnose individual instances for leaky data-field binder types, and integrates this into `#defeq_abuse` so it automatically reports leaky instances. A new `withDisabledInstance` helper temporarily evicts an instance from the discrimination tree (via `Attribute.erase` + `withoutModifyingEnv`), allowing `makeFastInstance` to compute the canonical form without `trySynthInstance` trivially finding the instance being checked. `#defeq_abuse` now checks instances used in the failing goal/command for leakiness and reports them alongside the isDefEq failure diagnostics. **Example: `#check_instance`** ```lean def MyNat := ℕ -- Without fast_instance%, the `add` field has binder type ℕ rather than MyNat. instance leakyAdd : Add MyNat := ⟨Nat.add⟩ #check_instance leakyAdd -- ❌ 'leakyAdd': leaky binder types detected. -- The data field `add` has binder type ℕ where MyNat is expected. -- The `fast_instance%` elaborator may be useful as a repair or band-aid: -- `instance : ... := fast_instance% ` instance fixedAdd : Add MyNat := fast_instance% ⟨Nat.add⟩ #check_instance fixedAdd -- ✅ 'fixedAdd': canonical (re-inferred form agrees at instances transparency) ``` 🤖 Prepared with Claude Code LLM-generated awaiting-author t-meta merge-conflict 317/17 Mathlib/Tactic/DefEqAbuse.lean,Mathlib/Tactic/FastInstance.lean,MathlibTest/CheckInstance.lean,MathlibTest/DefEqAbuse.lean 4 43 ['JovanGerb', 'Vierkantor', 'eric-wieser', 'github-actions', 'kim-em', 'mathlib-merge-conflicts', 'ocfnash'] Vierkantor
assignee:Vierkantor
23-1030
23 days ago
60-14789
60 days ago
6-60386
6 days
36740 euprunin
author:euprunin
 chore: golf using `grind` The goal of this PR is to decrease the number of times lemmas are called explicitly. Any decrease in compilation time is a welcome side effect, although it is not a primary objective. Trace profiling results (differences <30 ms considered measurement noise): * `AlgebraicGeometry.Scheme.isBasis_affineOpens`: unchanged 🎉 * `SimpleGraph.Walk.takeUntil_eq_take`: 263 ms before, 180 ms after 🎉 * `SimpleGraph.Walk.dropUntil_eq_drop`: 382 ms before, 261 ms after 🎉 * `Int.image_Ico_emod`: unchanged 🎉 * `Equiv.Perm.ofSubtype_swap_eq`: unchanged 🎉 Profiled using `set_option trace.profiler true in`. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict 7/33 Mathlib/AlgebraicGeometry/AffineScheme.lean,Mathlib/Combinatorics/SimpleGraph/Walk/Decomp.lean,Mathlib/Data/Int/Interval.lean,Mathlib/GroupTheory/Perm/Support.lean 4 8 ['artie2000', 'chenson2018', 'github-actions', 'mathlib-merge-conflicts'] nobody
23-1028
23 days ago
23-1029
23 days ago
43-5868
43 days
37191 artie2000
author:artie2000
 chore(Geometry/Convex/Cone/Pointed): clean up variables * Remove variable overwrites by changing `variable` declarations and renaming variables * Rename variables to maintain rough type-consistency within the file * Reorganise sections in order of increasing typeclass strength * Bring explicit/implicit variables in line with convention This PR doesn't change any declarations beyond changing variable explicitness. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-convex-geometry awaiting-author merge-conflict 148/129 Mathlib/Geometry/Convex/Cone/Pointed.lean 1 15 ['YaelDillies', 'artie2000', 'github-actions', 'martinwintermath', 'mathlib-merge-conflicts'] YaelDillies
assignee:YaelDillies
23-903
23 days ago
29-45457
29 days ago
25-78701
25 days
33692 AntoineChambert-Loir
author:AntoineChambert-Loir
 feat(LinearAlgebra/Transvection/SpecialLinearGroup): generation of the special linear group by transvections Consider transvections in the special linear group. Prove that they generate the group. Prove Dieudonné's refinement about the minimal number needed to write an element as a product of transvections. --- - [ ] depends on: #33560 - [ ] depends on: #33485 - [ ] depends on: #33402 - [ ] depends on: #33392 - [ ] depends on: #33387 - [ ] depends on: #33348 - [ ] depends on: #33347 - [ ] depends on: #33282 - [x] depends on: #32757 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra blocked-by-other-PR
label:t-algebra$
 1459/18 Mathlib.lean,Mathlib/LinearAlgebra/Center.lean,Mathlib/LinearAlgebra/LinearIndependent/Lemmas.lean,Mathlib/LinearAlgebra/Projectivization/Action.lean,Mathlib/LinearAlgebra/Transvection/Basic.lean,Mathlib/LinearAlgebra/Transvection/Generation.lean,Mathlib/LinearAlgebra/Transvection/SpecialLinearGroup.lean 7 10 ['github-actions', 'mathlib-merge-conflicts', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
22-84214
22 days ago
135-80245
135 days ago
0-93
1 minute
33882 AntoineChambert-Loir
author:AntoineChambert-Loir
 feat(LinearAlgebra/Transvection/SpecialLinearGroup): commutators in the special linear group Over a field, prove the following results : * transvections are conjugate in the general linear group; except in rank 2, they are conjugate in the special linear group. * the special linear group is equal to its commutator subgroup (except when it doesn't, ie, in rank 2 over a field with 2 or 3 elements). --- - [x] depends on: #33347 - [x] depends on: #33348 - [x] depends on: #33387 - [x] depends on: #33282 - [ ] depends on: #33392 - [ ] depends on: #33402 - [ ] depends on: #33485 - [x] depends on: #32757 - [ ] depends on: #33560 - [ ] depends on: #33692 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) blocked-by-other-PR t-algebra
label:t-algebra$
 1991/31 Mathlib.lean,Mathlib/GroupTheory/Commutator/Basic.lean,Mathlib/LinearAlgebra/Basis/Fin.lean,Mathlib/LinearAlgebra/Center.lean,Mathlib/LinearAlgebra/Dual/Defs.lean,Mathlib/LinearAlgebra/LinearIndependent/Lemmas.lean,Mathlib/LinearAlgebra/Projectivization/Action.lean,Mathlib/LinearAlgebra/SpecialLinearGroup.lean,Mathlib/LinearAlgebra/Transvection/Basic.lean,Mathlib/LinearAlgebra/Transvection/Generation.lean,Mathlib/LinearAlgebra/Transvection/SpecialLinearGroup.lean 11 7 ['AntoineChambert-Loir', 'github-actions', 'mathlib-merge-conflicts', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
22-83882
22 days ago
130-27656
130 days ago
0-50
50 seconds
33916 AntoineChambert-Loir
author:AntoineChambert-Loir
 feat(LinearAlgebra/SpecialLinearGroup/Simple): simplicity of the projective special linear group. Let `K` be a field and `V` be a `K`-vector space. * `SpecialLinearGroup.isQuasiSimpleGroup`: if `finrank K V` is at least 3, or if `finrank K V = 2` and `K` has at least 4 elements, then `SpecialLinearGroup K V` is quasi-simple, namely, the quotient group `SpecialLinearGroup K V ⧸ Subgroup.center (SpecialLinearGroup K V)` is simple. --- - [x] depends on: #32757 - [x] depends on: #33347 - [x] depends on: #33282 - [x] depends on: #33348 - [x] depends on: #33387 - [ ] depends on: #33392 - [ ] depends on: #33402 - [ ] depends on: #33485 - [ ] depends on: #33560 - [ ] depends on: #33692 - [ ] depends on: #33882 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) blocked-by-other-PR t-algebra
label:t-algebra$
 2213/31 Mathlib.lean,Mathlib/GroupTheory/Commutator/Basic.lean,Mathlib/LinearAlgebra/Basis/Fin.lean,Mathlib/LinearAlgebra/Center.lean,Mathlib/LinearAlgebra/Dual/Defs.lean,Mathlib/LinearAlgebra/LinearIndependent/Lemmas.lean,Mathlib/LinearAlgebra/Projectivization/Action.lean,Mathlib/LinearAlgebra/SpecialLinearGroup.lean,Mathlib/LinearAlgebra/SpecialLinearGroup/Simple.lean,Mathlib/LinearAlgebra/Transvection/Basic.lean,Mathlib/LinearAlgebra/Transvection/Generation.lean,Mathlib/LinearAlgebra/Transvection/SpecialLinearGroup.lean 12 6 ['github-actions', 'mathlib-merge-conflicts', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
22-83854
22 days ago
129-27604
129 days ago
0-1083
18 minutes
37535 grunweg
author:grunweg
 chore(FiberBundle/Trivialisation): tag with grind I am unsure if all of these are good grind lemmas; close examination is welcome. I left XXX comments with my questions; there are about 3 different questions repeating a few times. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-topology awaiting-author merge-conflict 49/19 Mathlib/Topology/FiberBundle/Trivialization.lean 1 7 ['chenson2018', 'github-actions', 'grunweg', 'mathlib-merge-conflicts'] urkud
assignee:urkud
22-78825
22 days ago
47-49030
47 days ago
2-73668
2 days
37603 Parcly-Taxel
author:Parcly-Taxel
 refactor: review of `SetSemiring` * Rename `Set.up` and `SetSemiring.down` to `SetSemiring.ofSet` and `SetSemiring.toSet` respectively. Unprotect both and make them equivalences, following `FreeMonoid`. * Derive `CompleteAtomicBooleanAlgebra` for `SetSemiring` immediately. * Add `imageHom_id` and `imageHom_comp`. The three existing lemmas about `imageHom` are coalesced into `imageHom_apply`. Ultimately inspired by https://github.com/leanprover-community/mathlib4/pull/36934#issuecomment-4183475568. maintainer-merge merge-conflict 120/165 Mathlib/Algebra/Algebra/Operations.lean,Mathlib/Data/Set/Semiring.lean 2 42 ['Parcly-Taxel', 'YaelDillies', 'eric-wieser', 'github-actions', 'mathlib-merge-conflicts', 'sgouezel'] nobody
22-78818
22 days ago
22-78819
22 days ago
22-62470
22 days
37723 xgenereux
author:xgenereux
 feat(Adjoin/Polynomial/Transcendental): Adjoining transcendental elements This PR establishes some basic properties about `A[y]` when `y` is transcendental over `A`. These are mostly just carried over from `A[X]`. - Move `algEquivOfTranscendental` in the newly created file `Mathlib.RingTheory.Adjoin.Polynomial.Transcendental` - Add `Algebra.adjoin.evalOfTranscendental`. This is technically very similar to `Algebra.adjoin.liftSingleton` but the definition is much simpler. It is also currently more general in the sense that it doesn't require `A` to be a field. - Some basic instances from `Polynomial`. Note that these are actually theorems because of the hypothesis `(h : Transcendental R s)` everywhere. I've also added a `Fact` version to allow the possibility of instances. Last note : I initially considered adding some results in `RingTheory.Polynomial.Quotient` where I golfed the file a tiny bit. I removed the unused results but kept the golf. Co-authored-by: María Inés de Frutos Fernández <[mariaines.dff@gmail.com](mailto:mariaines.dff@gmail.com)> --- - [ ] depends on: #36439 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-ring-theory blocked-by-other-PR merge-conflict 135/65 Mathlib.lean,Mathlib/Algebra/Algebra/Subalgebra/Lattice.lean,Mathlib/FieldTheory/RatFunc/AsPolynomial.lean,Mathlib/RingTheory/Adjoin/Polynomial/Basic.lean,Mathlib/RingTheory/Adjoin/Polynomial/Bivariate.lean,Mathlib/RingTheory/Adjoin/Polynomial/Transcendental.lean,Mathlib/RingTheory/Algebraic/Basic.lean,Mathlib/RingTheory/Polynomial/Quotient.lean 8 5 ['github-actions', 'leanprover-radar', 'mathlib-dependent-issues', 'mathlib-merge-conflicts', 'riccardobrasca'] nobody
22-78816
22 days ago
45-70010
45 days ago
0-1922
32 minutes
37806 Raph-DG
author:Raph-DG
 chore(Topology): rename `Function.locallyFinsupp` to `Function.LocallyFinsupp` And move single from `LocallyFinSuppWithin` to `LocallyFinsupp`. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) awaiting-author merge-conflict 343/146 Mathlib/Analysis/Complex/JensenFormula.lean,Mathlib/Analysis/Complex/ValueDistribution/FirstMainTheorem.lean,Mathlib/Analysis/Complex/ValueDistribution/LogCounting/Asymptotic.lean,Mathlib/Analysis/Complex/ValueDistribution/LogCounting/Basic.lean,Mathlib/Analysis/Meromorphic/Divisor.lean,Mathlib/Analysis/Meromorphic/FactorizedRational.lean,Mathlib/Analysis/Meromorphic/NormalForm.lean,Mathlib/Topology/LocallyFinsupp.lean 8 11 ['Raph-DG', 'chrisflav', 'github-actions', 'jcommelin', 'mathlib-merge-conflicts'] nobody
22-78815
22 days ago
36-13277
36 days ago
4-50448
4 days
38329 jcommelin
author:jcommelin
 chore: tighten down public/exposed API of AlgebraicClosure This PR tightens down the API of AlgebraicClosure, by making few parts of FieldTheory/IsAlgClosed/AlgebraicClosure.lean public and/or exposed. We still need to expose the main definition. It would be great if we can unexpose it in the future. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra merge-conflict
label:t-algebra$
 73/53 Mathlib/Algebra/Lie/TraceForm.lean,Mathlib/FieldTheory/AxGrothendieck.lean,Mathlib/FieldTheory/Differential/Liouville.lean,Mathlib/FieldTheory/IsAlgClosed/AlgebraicClosure.lean,Mathlib/ModelTheory/Algebra/Field/IsAlgClosed.lean,Mathlib/RingTheory/Discriminant.lean,Mathlib/RingTheory/IntegralClosure/IntegralRestrict.lean,Mathlib/RingTheory/Norm/Transitivity.lean,Mathlib/RingTheory/Trace/Basic.lean 9 26 ['eric-wieser', 'github-actions', 'jcommelin', 'kbuzzard', 'leanprover-radar', 'mathlib-merge-conflicts', 'plp127', 'riccardobrasca'] nobody
22-78801
22 days ago
22-78802
22 days ago
7-41851
7 days
38444 astrainfinita
author:astrainfinita
 refactor(Order/(Conditionally)CompletePartialOrder): extends `OrderSupSet` --- - [ ] depends on: #35674 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) blocked-by-other-PR merge-conflict 438/219 Mathlib/Algebra/Order/Group/Pointwise/CompleteLattice.lean,Mathlib/Algebra/Order/Nonneg/Lattice.lean,Mathlib/Algebra/Tropical/Lattice.lean,Mathlib/Analysis/Seminorm.lean,Mathlib/Data/Int/ConditionallyCompleteOrder.lean,Mathlib/Data/NNReal/Defs.lean,Mathlib/Data/Nat/Lattice.lean,Mathlib/Data/Real/Archimedean.lean,Mathlib/Data/Real/Pointwise.lean,Mathlib/MeasureTheory/OuterMeasure/Induced.lean,Mathlib/Order/Bounds/Basic.lean,Mathlib/Order/Bounds/Defs.lean,Mathlib/Order/CompleteLattice/Basic.lean,Mathlib/Order/CompleteLattice/Defs.lean,Mathlib/Order/CompleteLatticeIntervals.lean,Mathlib/Order/CompletePartialOrder.lean,Mathlib/Order/ConditionallyCompleteLattice/Basic.lean,Mathlib/Order/ConditionallyCompleteLattice/Defs.lean,Mathlib/Order/ConditionallyCompleteLattice/Indexed.lean,Mathlib/Order/ConditionallyCompletePartialOrder/Basic.lean,Mathlib/Order/ConditionallyCompletePartialOrder/Defs.lean,Mathlib/Order/ConditionallyCompletePartialOrder/Indexed.lean,Mathlib/Order/Copy.lean,Mathlib/Order/LiminfLimsup.lean,Mathlib/Order/SetNotation.lean,Mathlib/Order/SuccPred/CompleteLinearOrder.lean,Mathlib/Probability/Process/HittingTime.lean,Mathlib/SetTheory/Cardinal/Order.lean,Mathlib/SetTheory/Ordinal/Basic.lean,Mathlib/SetTheory/Ordinal/Exponential.lean,Mathlib/SetTheory/Ordinal/Family.lean,Mathlib/Topology/NoetherianSpace.lean,Mathlib/Topology/UniformSpace/OfCompactT2.lean 33 3 ['github-actions', 'mathlib-dependent-issues', 'mathlib-merge-conflicts'] nobody
22-78795
22 days ago
28-57486
28 days ago
0-2484
41 minutes
38635 Fieldnote-Echo
author:Fieldnote-Echo
 chore(scripts): handle simple to_additive deprecations Closes #38550. This updates `scripts/add_deprecations.sh` so that, when a renamed declaration is near an existing `@[to_additive]` attribute, the script also emits the additive deprecation alias in the common default-name case. For example, `foo_mul -> bar_mul` now produces: ```lean @[deprecated (since := "...")] alias foo_add := bar_add @[to_additive existing, deprecated (since := "...")] alias foo_mul := bar_mul ``` This is intentionally conservative and text-based, matching the existing script. It handles common name translations such as mul/add, prod/sum, one/zero, inv/neg, and div/sub, and skips cases that look like they need less common to_additive name generation. Tested with a local six-case fixture and a scratch Lean file confirming that the generated alias form compiles and produces deprecation warnings for both names. I opened this as draft because I still count as a new contributor under the LLM-assisted PR policy. I have one merged mathlib PR (#36443), and this is a one-file script patch that I reviewed/tested manually. I'll leave it as draft unless a maintainer gives it the green light to flip ready. I used Claude assistance while drafting and testing the patch. I reviewed the final diff manually and tested the generated Lean form locally. CI new-contributor 121/10 scripts/add_deprecations.sh 1 4 ['Fieldnote-Echo', 'SnirBroshi', 'github-actions'] kim-em
assignee:kim-em
22-59745
22 days ago
unknown
0-0
0 seconds
37930 vlad902
author:vlad902
 chore(SimpleGraph): move `cycleGraph` to its own file PR #34797 re-defined `cycleGraph` independent of `circulantGraph`. Now move the definition of `cycleGraph` to its own file so that the definition can be used without importing the algebra hierarchy. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-combinatorics 173/148 Mathlib.lean,Mathlib/Combinatorics/SimpleGraph/Circulant.lean,Mathlib/Combinatorics/SimpleGraph/Cycle.lean 3 2 ['github-actions', 'mathlib-merge-conflicts'] nobody
22-58457
22 days ago
22-58480
22 days ago
22-58578
22 days
38752 joelriou
author:joelriou
 feat(CategoryTheory): the bicategory of triangulated categories See Zulip [#general > backward.isDefEq.respectTransparency @ 💬](https://leanprover.zulipchat.com/#narrow/channel/113488-general/topic/backward.2EisDefEq.2ErespectTransparency/near/591988149) --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) WIP t-category-theory 168/0 Mathlib.lean,Mathlib/CategoryTheory/Triangulated/Bicategory.lean 2 1 ['github-actions'] nobody
22-47631
22 days ago
22-49176
22 days ago
0-2
2 seconds
38759 chrisflav
author:chrisflav
 chore(CategoryTheory): more experiments with unification hints --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-category-theory 106/2 Mathlib/CategoryTheory/Functor/Basic.lean,Mathlib/Tactic/Simps/Basic.lean,Mathlib/Tactic/Simps/UnifHintAttr.lean,MathlibTest/Simps.lean 4 1 ['github-actions'] nobody
22-43275
22 days ago
unknown
0-0
0 seconds
38732 eric-wieser
author:eric-wieser
 fix: revert and fix #38703 #38703 removed the canary intended to detect a broken lemma, without fixing the lemma. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra delegated
label:t-algebra$
 4/11 Mathlib/Algebra/Group/Action/Units.lean 1 5 ['github-actions', 'kbuzzard', 'mathlib-bors'] nobody
22-40823
22 days ago
22-40823
22 days ago
0-57214
15 hours
37832 YaelDillies
author:YaelDillies
 chore(Algebra/Order/GroupWithZero): flatten `Unbundled` folder The algebraic order classes are unbundled now. --- More thought is needed to do the same for `Algebra.Order.Monoid` since filenames conflict. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) file-removed t-algebra t-order
label:t-algebra$
 20/20 Mathlib.lean,Mathlib/Algebra/Order/BigOperators/GroupWithZero/Finset.lean,Mathlib/Algebra/Order/BigOperators/GroupWithZero/List.lean,Mathlib/Algebra/Order/Field/Basic.lean,Mathlib/Algebra/Order/Field/Pointwise.lean,Mathlib/Algebra/Order/GroupWithZero/Basic.lean,Mathlib/Algebra/Order/GroupWithZero/Bounds.lean,Mathlib/Algebra/Order/GroupWithZero/Canonical.lean,Mathlib/Algebra/Order/GroupWithZero/Defs.lean,Mathlib/Algebra/Order/GroupWithZero/Finset.lean,Mathlib/Algebra/Order/GroupWithZero/OrderIso.lean,Mathlib/Algebra/Order/GroupWithZero/Submonoid.lean,Mathlib/Algebra/Order/GroupWithZero/WithZero.lean,Mathlib/Algebra/Order/Nonneg/Basic.lean,Mathlib/Algebra/Order/Ring/Defs.lean,Mathlib/Algebra/Order/Ring/Unbundled/Basic.lean,Mathlib/Order/Filter/IsBounded.lean,Mathlib/RingTheory/DedekindDomain/Ideal/Lemmas.lean,Mathlib/Tactic/FieldSimp/Lemmas.lean 19 3 ['github-actions', 'mathlib-merge-conflicts'] nobody
22-23342
22 days ago
22-23368
22 days ago
41-28196
41 days
37736 EtienneC30
author:EtienneC30
 feat: API for binomial distribution Provide basic API regarding the binomial distribution, computing the measure of singletons and writing it as a sum of Dirac masses. Provide basic results regarding integrability. Deprecate [PMF.binomial](https://leanprover-community.github.io/mathlib4_docs/Mathlib/Probability/ProbabilityMassFunction/Binomial.html#PMF.binomial). --- As I explain in the module docstring, I am proving most results in two versions: one for the measure over `Nat` and one for the cast version. This obviously leads to some duplications, I think it's fine but I am happy to hear other ideas. - [ ] depends on: #37534 - [ ] depends on: #37541 - [x] depends on: #37543 - [x] depends on: #37739 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-measure-probability blocked-by-other-PR large-import 196/18 Mathlib/Data/Set/Card.lean,Mathlib/Probability/Distributions/Binomial.lean,Mathlib/Probability/Distributions/Poisson/PoissonLimitThm.lean,Mathlib/Probability/ProbabilityMassFunction/Binomial.lean 4 2 ['github-actions', 'mathlib-dependent-issues'] nobody
22-19598
22 days ago
unknown
0-0
0 seconds
38742 Jun2M
author:Jun2M
 feat(Tactic): simproc for `Eq.rec` Note: This PR was written with a lot of help from AI (Opus 4.7). I am still learning Lean meta programming. I would very much welcome any feedback. Problem: There are a lot of `cast` like functions for various definitions in Mathlib: [`Fin.cast`](https://leanprover-community.github.io/mathlib4_docs/Init/Data/Fin/Basic.html#Fin.cast), [`List.Vector.congr`](https://leanprover-community.github.io/mathlib4_docs/Mathlib/Data/Vector/Defs.html#List.Vector.congr), [`SimpleGraph.Walk.copy`](https://leanprover-community.github.io/mathlib4_docs/Mathlib/Combinatorics/SimpleGraph/Walk/Operations.html#SimpleGraph.Walk.copy), [`Path.cast`](https://leanprover-community.github.io/mathlib4_docs/Mathlib/Topology/Path.html#Path.cast), [`Sym.cast`](https://leanprover-community.github.io/mathlib4_docs/Mathlib/Data/Sym/Basic.html#Sym.cast), [`Partition.copy`](https://leanprover-community.github.io/mathlib4_docs/Mathlib/Order/Partition/Basic.html#Partition.copy), [`Finpartition.copy`](https://leanprover-community.github.io/mathlib4_docs/Mathlib/Order/Partition/Finpartition.html#Finpartition.copy) & etc. All of these functions does the same as `h ▸ a` where `h` is a proof of equality of something in the type of `a`. I think this is caused because proving the properties about `h ▸ a` is too difficult without extra tooling. All of the above follows the pattern where it is an indexed type where it contains * some data * proof that the data is related to the index and casting only changes the second part. The trouble happens when I would like to talk about the data of the casted object. There is `congr_eqRec` lemma in Battery that are exactly for this situation but even after adding `simp` tag to it, it is not being used. [Here](https://live.lean-lang.org/#codez=JYWwDg9gTgLgBAWQIYwBYBtgCMBQeCmAHkuOvnAN6CNwHAFxwAqAnmPgFQC%2BlYdcNgSYR84ggApQIYLhSRwsvKlwAUhXgGUArlhgtyinkgCUBuItS8ZAXlnH6puIA7SOIQMA6AG5J0cK4Xee6VlhMcDhwcADOoDwA2gDGEAB2AOZQAPr4AI4ASvixALoExKTkFAlwILyAqIRKPPQAYsBlimUA1HAAjEYmZvRlViA23Q5wYK4eXlZgfl60gcGhEVFwcYkp6dm5BThEJGBklABqvMysnJQA4mpRZOdQSGBmB1LqcG5wAO68TyYA6rznLh%2BngA1nAXm5jHZ6C8rO9BnZHD9XPgACZJfDhbxwH4uVHozGzWTzMKRcDLeLJNKZHL5BYAWjpcCg%2BAAZo1yBS1tTcnAAPypOBmH6FXb7ajHHRnCiY%2BD0VT4eAKEwiXgiJCwYAwYCJCKQnoRLEweEIuAq%2BhqjVanVGtQKkzyxVdKxmuYhElRXnk1ZUjb5N1wBlM1nsuCcn00vkCswiPA4IA), all of these simp tactics fail. Solution: This PR introduces a simproc `castData` (I would welcome a name suggestion) and attribute `cast_data`. When it sees `f ... (h ▸ x)` where `f` is tagged with `cast_data`, `castData` will try to simplify to `f ... x`. This simproc proves all 4 examples linked above. Hopefully this removes the need for all the `cast`-like definition and their APIs. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) LLM-generated 122/7 Mathlib.lean,Mathlib/CategoryTheory/Sites/IsSheafFor.lean,Mathlib/CategoryTheory/WithTerminal/Basic.lean,Mathlib/Combinatorics/SimpleGraph/Walk/Basic.lean,Mathlib/Data/FunLike/Basic.lean,Mathlib/Data/SetLike/Basic.lean,Mathlib/Data/Subtype.lean,Mathlib/Tactic.lean,Mathlib/Tactic/Simproc/CastData.lean 9 9 ['Jun2M', 'SnirBroshi', 'github-actions', 'leanprover-radar', 'mathlib-bors'] nobody
22-18774
22 days ago
22-76891
22 days ago
0-2835
47 minutes
38766 yuanyi-350
author:yuanyi-350
 chore(AlgebraicTopology/DoldKan/GammaCompN): remove an erw - rewrites `N₂Γ₂ToKaroubiIso_inv_app` with a single `simp` invocation on the relevant splitting definitions Extracted from #38415 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebraic-topology codex LLM-generated awaiting-author 1/1 Mathlib/AlgebraicTopology/DoldKan/GammaCompN.lean 1 2 ['dagurtomas', 'github-actions'] nobody
22-10087
22 days ago
22-10087
22 days ago
0-28342
7 hours
37531 EtienneC30
author:EtienneC30
 feat: integral of the binomial distribution Provide the probability of singletons under the binomial distribution and compute the expectation. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-measure-probability merge-conflict 212/6 Mathlib/Data/Set/Card.lean,Mathlib/Probability/Distributions/Binomial.lean,Mathlib/Probability/Distributions/SetBernoulli.lean 3 2 ['github-actions', 'mathlib-merge-conflicts'] nobody
22-2727
22 days ago
unknown
0-0
0 seconds
38764 yuanyi-350
author:yuanyi-350
 chore(AlgebraicGeometry/Modules/Tilde): remove an erw - rewrites the naturality proof in `fromTildeΓNatTrans` by making the `FullSubcategory.comp_hom` and `NatTrans.comp_app` steps explicit in the `rw` chain Extracted from #38415 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) codex t-algebraic-geometry LLM-generated awaiting-author 3/1 Mathlib/AlgebraicGeometry/Modules/Tilde.lean 1 2 ['dagurtomas', 'github-actions'] nobody
22-914
22 days ago
22-914
22 days ago
0-37520
10 hours
38390 mortarsanjaya
author:mortarsanjaya
 feat(Data/Nat/Cast/Order/Basic): introduce new class `IsMonotoneNatCast` The class says that `Nat.cast` is monotone in an `AddMonoidWithOne`. Basically, we use this class when we only care about comparing the elements of a monoid that comes from the `Nat`s (so we do not have to care about the compatibility between the additive structure of the monoid and its order structure). --- Other than that, I'm also reorganizing some section naming, and I change the proof of the `Nontrivial` instance at the bottom to using `NeZero.nontrivial`. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-data new-contributor 28/18 Mathlib/Data/Nat/Cast/Order/Basic.lean 1 7 ['github-actions', 'leanprover-radar', 'mathlib-bors', 'mortarsanjaya', 'vihdzp'] nobody
21-84848
21 days ago
21-84849
21 days ago
7-85443
7 days
38747 SnirBroshi
author:SnirBroshi
 feat(Combinatorics/SimpleGraph/Basic): more `neighborSet` and `IsIsolated` lemmas --- `neighborSet_mono` moved from `Maps.lean` to `Basic.lean` with a simpler proof [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-combinatorics 72/17 Mathlib/Combinatorics/SimpleGraph/Basic.lean,Mathlib/Combinatorics/SimpleGraph/Finite.lean,Mathlib/Combinatorics/SimpleGraph/Maps.lean,Mathlib/Combinatorics/SimpleGraph/StronglyRegular.lean 4 2 ['github-actions', 'vlad902'] nobody
21-80136
21 days ago
22-692
22 days ago
22-54692
22 days
37870 Jun2M
author:Jun2M
 feat(Combinatorics/Graph): `Simple` typeclass for `Graph` This PR introduces two type classes on `Graph`: `Loopless` and `Simple`. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-combinatorics 93/0 Mathlib.lean,Mathlib/Combinatorics/Graph/Simple.lean 2 2 ['github-actions', 'mathlib-merge-conflicts'] nobody
21-72675
21 days ago
21-72699
21 days ago
41-20443
41 days
37819 YellPika
author:YellPika
 feat(Order/OmegaCompletePartialOrder): add `OmegaCompletePartialOrder` instance for `WithBot` with basic `ωScottContinuous` lemmas This is a modification of #34093. See #34093 for details. --- - [x] depends on: #33941 - [x] depends on: #37258 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor t-order merge-conflict 337/10 Mathlib/Algebra/Order/Ring/WithTop.lean,Mathlib/Analysis/BoxIntegral/Box/Basic.lean,Mathlib/Order/Monotone/Basic.lean,Mathlib/Order/OmegaCompletePartialOrder.lean,Mathlib/Order/TypeTags.lean,Mathlib/Order/WithBot.lean 6 5 ['Komyyy', 'github-actions', 'mathlib-dependent-issues', 'mathlib-merge-conflicts'] Komyyy
assignee:Komyyy
21-62026
21 days ago
21-62026
21 days ago
22-11204
22 days
38537 astrainfinita
author:astrainfinita
 refactor(Order): make completeness typeclasses mixins This PR turns completeness typeclasses that are weaker than `CompleteLattice` into mixins. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) [Zulip](https://leanprover.zulipchat.com/#narrow/channel/113488-general/topic/Any.20infimum.20based.20version.20of.20.60OmegaCompletePartialOrder.60.3F/) Refactoring `CompleteLattice` would touch many more files, and there are still some unresolved design issues. I've modified 100 files and still haven't determined the correct approach. In this PR, `ConditionallyCompleteLattice` only requires `PartialOrder`, so that it can be used for types like `NonemptyInterval`. t-order WIP merge-conflict 578/580 Counterexamples/SorgenfreyLine.lean,Mathlib/Algebra/FiniteSupport/Basic.lean,Mathlib/Algebra/Order/CompleteField.lean,Mathlib/Algebra/Order/Group/CompleteLattice.lean,Mathlib/Algebra/Order/Group/Indicator.lean,Mathlib/Algebra/Order/Group/Pointwise/CompleteLattice.lean,Mathlib/Algebra/Order/Nonneg/Lattice.lean,Mathlib/Algebra/Tropical/BigOperators.lean,Mathlib/Algebra/Tropical/Lattice.lean,Mathlib/Analysis/Asymptotics/LinearGrowth.lean,Mathlib/Analysis/Normed/Unbundled/SpectralNorm.lean,Mathlib/Control/LawfulFix.lean,Mathlib/Data/ENat/Basic.lean,Mathlib/Data/EReal/Basic.lean,Mathlib/Data/Fintype/Order.lean,Mathlib/Data/Int/ConditionallyCompleteOrder.lean,Mathlib/MeasureTheory/Constructions/BorelSpace/Order.lean,Mathlib/MeasureTheory/Covering/Besicovitch.lean,Mathlib/MeasureTheory/Function/EssSup.lean,Mathlib/MeasureTheory/Function/LocallyIntegrable.lean,Mathlib/MeasureTheory/Integral/BoundedContinuousFunction.lean,Mathlib/MeasureTheory/Integral/IntervalIntegral/Basic.lean,Mathlib/MeasureTheory/Measure/Decomposition/Lebesgue.lean,Mathlib/NumberTheory/Height/Basic.lean,Mathlib/NumberTheory/Height/MvPolynomial.lean,Mathlib/Order/Bounds/Basic.lean,Mathlib/Order/BourbakiWitt.lean,Mathlib/Order/Category/OmegaCompletePartialOrder.lean,Mathlib/Order/CompleteLatticeIntervals.lean,Mathlib/Order/CompletePartialOrder.lean,Mathlib/Order/ConditionallyCompleteLattice/Basic.lean,Mathlib/Order/ConditionallyCompleteLattice/Defs.lean,Mathlib/Order/ConditionallyCompleteLattice/Finset.lean,Mathlib/Order/ConditionallyCompleteLattice/Group.lean,Mathlib/Order/ConditionallyCompleteLattice/Indexed.lean,Mathlib/Order/ConditionallyCompletePartialOrder/Basic.lean,Mathlib/Order/ConditionallyCompletePartialOrder/Defs.lean,Mathlib/Order/ConditionallyCompletePartialOrder/Indexed.lean,Mathlib/Order/Copy.lean,Mathlib/Order/Filter/AtTopBot/CompleteLattice.lean,Mathlib/Order/Filter/Extr.lean,Mathlib/Order/Interval/Set/OrdConnectedLinear.lean,Mathlib/Order/IsNormal.lean,Mathlib/Order/LiminfLimsup.lean,Mathlib/Order/Monotone/Extension.lean,Mathlib/Order/OmegaCompletePartialOrder.lean,Mathlib/Order/OrdContinuous.lean,Mathlib/Order/OrderIsoNat.lean,Mathlib/Order/PartialSups.lean,Mathlib/Order/SemiconjSup.lean,Mathlib/Order/SuccPred/Basic.lean,Mathlib/Order/SuccPred/CompleteLinearOrder.lean,Mathlib/Order/SupClosed.lean,Mathlib/Probability/IdentDistrib.lean,Mathlib/Probability/Martingale/BorelCantelli.lean,Mathlib/Probability/Martingale/Upcrossing.lean,Mathlib/Probability/Process/HittingTime.lean,Mathlib/Probability/Process/LocalProperty.lean,Mathlib/Probability/Process/Stopping.lean,Mathlib/Topology/Algebra/Order/LiminfLimsup.lean,Mathlib/Topology/FiberBundle/Basic.lean,Mathlib/Topology/MetricSpace/ProperSpace/Lemmas.lean,Mathlib/Topology/OmegaCompletePartialOrder.lean,Mathlib/Topology/Order/Basic.lean,Mathlib/Topology/Order/Bornology.lean,Mathlib/Topology/Order/Compact.lean,Mathlib/Topology/Order/IntermediateValue.lean,Mathlib/Topology/Order/IsLUB.lean,Mathlib/Topology/Order/LeftRightLim.lean,Mathlib/Topology/Order/LiminfLimsup.lean,Mathlib/Topology/Order/Monotone.lean,Mathlib/Topology/Order/MonotoneConvergence.lean,Mathlib/Topology/Order/OrderClosed.lean,Mathlib/Topology/Order/Rolle.lean,Mathlib/Topology/Semicontinuity/Basic.lean,MathlibTest/Delab/SupInf.lean 76 4 ['astrainfinita', 'github-actions', 'leanprover-radar', 'mathlib-merge-conflicts'] nobody
21-62022
21 days ago
26-73035
26 days ago
0-2782
46 minutes
38751 YaelDillies
author:YaelDillies
 feat(Data/Finset/Density): more `NNRat.cast` lemmas From AddCombi --- - [ ] depends on: #38716 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra large-import blocked-by-other-PR
label:t-algebra$
 69/39 Mathlib/Algebra/Order/Field/Rat.lean,Mathlib/Algebra/Order/Ring/Rat.lean,Mathlib/Combinatorics/SetFamily/LYM.lean,Mathlib/Data/Finset/Density.lean,Mathlib/Data/NNRat/Defs.lean,Mathlib/Data/NNRat/Floor.lean,Mathlib/Data/NNRat/Order.lean,Mathlib/Data/Rat/Star.lean,Mathlib/RingTheory/Binomial.lean,Mathlib/Topology/Instances/Rat.lean 10 2 ['github-actions', 'mathlib-dependent-issues'] nobody
21-53634
21 days ago
22-48525
22 days ago
0-1009
16 minutes
38799 YaelDillies
author:YaelDillies
 refactor(Combinatorics/Additive/Energy): switch to the compact normalisation In additive combinatorics, it is natural for the group of study to be considered with its compact normalisation (making it have total mass 1) and its dual group to be considered with its discrete normalisation (so that each singleton has mass 1), instead of the other way around and even when both groups are finite. In this case, I will soon generalise the energy to compact abelian groups, and possibly even to all abelian groups equipped with a mean. This PR is a first step towards that by renormalising the energy to be between 0 and 1. From AddCombi --- - [ ] depends on: #38751 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) blocked-by-other-PR t-combinatorics large-import 180/94 Mathlib/Algebra/Order/Field/Rat.lean,Mathlib/Algebra/Order/Ring/Rat.lean,Mathlib/Combinatorics/Additive/Energy.lean,Mathlib/Combinatorics/SetFamily/LYM.lean,Mathlib/Data/Finset/Density.lean,Mathlib/Data/NNRat/Defs.lean,Mathlib/Data/NNRat/Floor.lean,Mathlib/Data/NNRat/Order.lean,Mathlib/Data/Rat/Star.lean,Mathlib/RingTheory/Binomial.lean,Mathlib/Topology/Instances/Rat.lean 11 2 ['github-actions', 'mathlib-dependent-issues'] nobody
21-48284
21 days ago
21-49585
21 days ago
0-11
11 seconds
37342 vasnesterov
author:vasnesterov
 feat(Tactic/ComputeAsymptotics/Multiseries): non-primitive corecursion for Seq: more `FriendlyOperation` API This is a continuation of #35072. This PR adds more API about friendly operations: * `FriendlyOperation.coind`: a coinductive principle for proving that operation is friendly * `FriendlyOperationClass.eq_of_bisim`: a generalisation of `Seq.eq_of_bisim'` for proving two sequences are equal. --- - [x] depends on: #35072 This is a part of the `compute_asymptotics` tactic (#28291). [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-data t-meta awaiting-author 161/0 Mathlib/Tactic/ComputeAsymptotics/Multiseries/Corecursion.lean 1 5 ['github-actions', 'joneugster', 'mathlib-dependent-issues'] joneugster
assignee:joneugster
21-44546
21 days ago
21-44546
21 days ago
28-74243
28 days
38784 justus-springer
author:justus-springer
 feat(Algebra/Algebra/RestrictScalars): Generalize `RestrictScalars` Generalize `RestrictScalars` to allow restricting along a ring morphism `f : R →+* S` where `R` is not necessaritly commutative. This is a step towards resolving defeq abuses between `(restrictScalars f).obj M` and `M` for `M : ModuleCat R`, mentioned in the file `ModuleCat/ChangeOfRings.lean`. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) WIP 240/149 Mathlib/Algebra/Algebra/RestrictScalars.lean,Mathlib/Algebra/Category/ModuleCat/ChangeOfRings.lean,Mathlib/Algebra/Lie/BaseChange.lean,Mathlib/Analysis/Normed/Module/Basic.lean 4 2 ['eric-wieser', 'github-actions'] nobody
21-31519
21 days ago
22-18441
22 days ago
0-7
7 seconds
38413 yuanyi-350
author:yuanyi-350
 doc(CategoryTheory): fix typos In this PR, we used a Codex agent to scan the `CategoryTheory` directory to check for typos in the docstrings. We picked out some of the more obvious errors to fix in this PR. Depends on #38441 Co-authored-by: @LehengChen --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) LLM-generated codex documentation t-category-theory WIP 35/34 Mathlib/CategoryTheory/Abelian/GrothendieckCategory/EnoughInjectives.lean,Mathlib/CategoryTheory/Abelian/GrothendieckCategory/Subobject.lean,Mathlib/CategoryTheory/Abelian/Injective/Basic.lean,Mathlib/CategoryTheory/Abelian/Pseudoelements.lean,Mathlib/CategoryTheory/Action/Continuous.lean,Mathlib/CategoryTheory/Adjunction/AdjointFunctorTheorems.lean,Mathlib/CategoryTheory/Adjunction/Triple.lean,Mathlib/CategoryTheory/Center/Localization.lean,Mathlib/CategoryTheory/FiberedCategory/Fiber.lean,Mathlib/CategoryTheory/Functor/Const.lean,Mathlib/CategoryTheory/Functor/Derived/RightDerived.lean,Mathlib/CategoryTheory/Functor/KanExtension/Pointwise.lean,Mathlib/CategoryTheory/Functor/OfSequence.lean,Mathlib/CategoryTheory/Functor/Trifunctor.lean,Mathlib/CategoryTheory/GradedObject/Bifunctor.lean,Mathlib/CategoryTheory/Groupoid/Basic.lean,Mathlib/CategoryTheory/IsomorphismClasses.lean,Mathlib/CategoryTheory/Join/Final.lean,Mathlib/CategoryTheory/Limits/ExactFunctor.lean,Mathlib/CategoryTheory/Limits/Filtered.lean,Mathlib/CategoryTheory/Limits/Opposites.lean,Mathlib/CategoryTheory/Limits/Preserves/Shapes/Images.lean,Mathlib/CategoryTheory/Limits/Shapes/Pullback/HasPullback.lean,Mathlib/CategoryTheory/Limits/Shapes/Pullback/Iso.lean,Mathlib/CategoryTheory/Limits/Shapes/StrictInitial.lean,Mathlib/CategoryTheory/Limits/SmallComplete.lean,Mathlib/CategoryTheory/Limits/Types/Yoneda.lean,Mathlib/CategoryTheory/Localization/DerivabilityStructure/Basic.lean,Mathlib/CategoryTheory/Localization/SmallShiftedHom.lean,Mathlib/CategoryTheory/LocallyCartesianClosed/Over.lean,Mathlib/CategoryTheory/Monoidal/Action/End.lean,Mathlib/CategoryTheory/Monoidal/Braided/Multifunctor.lean 32 3 ['github-actions', 'mathlib-bors', 'mathlib-merge-conflicts'] nobody
21-25731
21 days ago
29-24951
29 days ago
0-2163
36 minutes
37878 YaelDillies
author:YaelDillies
 chore(Combinatorics/SimpleGraph): avoid structure relation predicates Relation predicates used to be `def`s over a `forall`, which was optimal for usability in fields of other structures. This changed in #35591 and #35192 as a byproduct of reducing apparent code duplication. Unfortunately, the usability issue was overlooked. This PR restores usability by dropping the use of those relation classes that are `structure`s, ie `Std.Irrefl` and `Std.Transitive`. It also uses more widely the `simp` auto-param on `SimpleGraph.loopless`. --- - [ ] depends on: #38554 I would also be happy to revert #35591 and #35192 since this demonstrates a good use case for the `def` versions of the relation predicates. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-combinatorics blocked-by-other-PR 43/53 Archive/Wiedijk100Theorems/Konigsberg.lean,Mathlib/Combinatorics/Digraph/Orientation.lean,Mathlib/Combinatorics/SimpleGraph/AdjMatrix.lean,Mathlib/Combinatorics/SimpleGraph/Basic.lean,Mathlib/Combinatorics/SimpleGraph/Circulant.lean,Mathlib/Combinatorics/SimpleGraph/CompleteMultipartite.lean,Mathlib/Combinatorics/SimpleGraph/FiveWheelLike.lean,Mathlib/Combinatorics/SimpleGraph/Hasse.lean,Mathlib/Combinatorics/SimpleGraph/Maps.lean,Mathlib/Combinatorics/SimpleGraph/Prod.lean,Mathlib/Combinatorics/SimpleGraph/Regularity/Uniform.lean,Mathlib/Combinatorics/SimpleGraph/Subgraph.lean,Mathlib/Combinatorics/SimpleGraph/Sum.lean,Mathlib/Combinatorics/SimpleGraph/Trails.lean,Mathlib/Combinatorics/SimpleGraph/Triangle/Tripartite.lean,Mathlib/Combinatorics/SimpleGraph/Walk/Basic.lean,Mathlib/ModelTheory/Graph.lean,Mathlib/Order/Cover.lean,Mathlib/Order/RelClasses.lean 19 17 ['SnirBroshi', 'Vierkantor', 'YaelDillies', 'github-actions', 'mathlib-dependent-issues', 'mathlib-merge-conflicts'] nobody
21-20005
21 days ago
26-17272
26 days ago
16-34670
16 days
38169 tb65536
author:tb65536
 chore(GroupTheory/Finiteness): make `Subgroup.FG` a class This PR refactors `Subgroup.FG` to be a class to match `Group.FG`. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra t-group-theory
label:t-algebra$
 37/20 Mathlib/GroupTheory/Commutator/Finite.lean,Mathlib/GroupTheory/Finiteness.lean,Mathlib/GroupTheory/Rank.lean,Mathlib/GroupTheory/Schreier.lean 4 10 ['JovanGerb', 'github-actions', 'mathlib-bors', 'riccardobrasca', 'tb65536'] riccardobrasca
assignee:riccardobrasca
21-12818
21 days ago
21-26886
21 days ago
35-14756
35 days
38056 Deicyde
author:Deicyde
 feat: topological vector bundle homomorphisms This PR implements topological vector bundle morphisms. - [ ] depends on: #38023 - [ ] depends on: #37946 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor t-topology merge-conflict 805/0 Mathlib/Analysis/Normed/Module/FiniteDimension.lean,Mathlib/Topology/FiberBundle/Basic.lean,Mathlib/Topology/FiberBundle/Trivialization.lean,Mathlib/Topology/VectorBundle/Basic.lean,Mathlib/Topology/VectorBundle/Morphism.lean 5 4 ['github-actions', 'mathlib-dependent-issues', 'mathlib-merge-conflicts'] nobody
21-7871
21 days ago
unknown
0-0
0 seconds
37784 SnirBroshi
author:SnirBroshi
 feat(Order/ConditionallyCompleteLattice/Basic): `ConditionallyCompleteLinearOrderBot (WithBot α)` --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-order 29/0 Mathlib/Order/ConditionallyCompleteLattice/Basic.lean 1 1 ['github-actions'] bryangingechen
assignee:bryangingechen
20-75083
20 days ago
44-71453
44 days ago
44-71164
44 days
38192 Jun2M
author:Jun2M
 feat(Order/ConditionallyCompleteLattice): ConditionallyCompleteSemiLatticeInf This PR introduces `ConditionallyCompleteSemilatticeSup/Inf`, Sup/Inf only versions of `ConditionallyCompleteLattice`. This is a preliminary PR for #37620, showing that `Graph` forms a `ConditionallyCompleteSemilatticeInf`. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-order help-wanted merge-conflict 109/33 Mathlib/Order/ConditionallyCompleteLattice/Basic.lean,Mathlib/Order/ConditionallyCompleteLattice/Defs.lean,Mathlib/Order/Copy.lean 3 13 ['Jun2M', 'github-actions', 'mathlib-bors', 'mathlib-merge-conflicts', 'staroperator', 'vihdzp'] nobody
20-72338
20 days ago
34-79072
34 days ago
0-5
5 seconds
38586 chrisflav
author:chrisflav
 feat(RingTheory): algebra maps between finite étale algebras are locally finite split From Pi1. --- - [ ] depends on: #38649 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) WIP t-ring-theory large-import blocked-by-other-PR merge-conflict 335/2 Mathlib/Algebra/Algebra/Pi.lean,Mathlib/Algebra/Group/Idempotent.lean,Mathlib/Algebra/Module/FinitePresentation.lean,Mathlib/RingTheory/LocalRing/Basic.lean,Mathlib/RingTheory/Localization/BaseChange.lean,Mathlib/RingTheory/Localization/Module.lean,Mathlib/RingTheory/Spectrum/Prime/FreeLocus.lean,Mathlib/RingTheory/TotallySplit.lean 8 5 ['chrisflav', 'github-actions', 'mathlib-dependent-issues', 'mathlib-merge-conflicts'] nobody
20-72331
20 days ago
25-12165
25 days ago
0-1
1 second
38142 SnirBroshi
author:SnirBroshi
 feat(Order/SuccPred/CompleteLinearOrder): generalize `csSup_mem_of_not_isSuccLimit` Given `s.Nonempty` and `BddAbove s` we can conclude `sSup s ∈ s` using either: - `csSup_mem_of_not_isSuccPrelimit`, given `ConditionallyCompleteLinearOrder` and `¬IsSuccPrelimit (sSup s)` - `csSup_mem_of_not_isSuccLimit`, given `ConditionallyCompleteLinearOrderBot` and `¬IsSuccLimit (sSup s)` We generalize both to a theorem that requires `ConditionallyCompleteLinearOrder` and `¬IsSuccLimit (sSup s)`. This creates 8 theorems that require `¬IsSuccPrelimit` but are now easily proved with the `¬IsSuccLimit` theorems, we replace `csSup_mem_of_not_isSuccPrelimit`/`exists_eq_ciSup_of_not_isSuccPrelimit` with their primed `ConditionallyCompleteLinearOrderBot` theorems, and deprecates the other 6. Tags a random `to_dual` (in `ConditionallyCompleteLattice/Basic.lean`) to let us `to_dual`ize the new lemmas. --- ~~Should we also deprecate the 8 theorems that require `¬IsSuccPrelimit` and now use `mt`?~~ [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-order 55/42 Mathlib/Order/ConditionallyCompleteLattice/Basic.lean,Mathlib/Order/SuccPred/CompleteLinearOrder.lean,Mathlib/SetTheory/Cardinal/Order.lean 3 9 ['SnirBroshi', 'github-actions', 'mathlib-merge-conflicts', 'vihdzp'] nobody
20-69372
20 days ago
20-69396
20 days ago
35-67513
35 days
38841 SnirBroshi
author:SnirBroshi
 feat(Mathlib/Order/SuccPred/Limit): more `WithTop` lemmas about `IsMin`/`CovBy`/`IsSuccLimit` --- Continues the work from #38244 We should probably also have such lemmas for `WithTopBot`/`WithBotTop`, but that's for another day [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-order 111/30 Mathlib/Order/Cover.lean,Mathlib/Order/SuccPred/Limit.lean,Mathlib/Order/WithBot.lean 3 1 ['github-actions'] nobody
20-38934
20 days ago
20-49450
20 days ago
20-49968
20 days
38213 WenrongZou
author:WenrongZou
 feat(FormalGroup): APIs for formal group homomorphism This PR introduces some APIs for homomorphism between formal group laws. --- - [ ] depends on: #38052 - [ ] depends on: #37618 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-ring-theory large-import blocked-by-other-PR 425/11 Mathlib/RingTheory/FormalGroup/Basic.lean,Mathlib/RingTheory/MvPowerSeries/Equiv.lean,Mathlib/RingTheory/MvPowerSeries/Substitution.lean,Mathlib/RingTheory/PowerSeries/Basic.lean,Mathlib/RingTheory/PowerSeries/Evaluation.lean,Mathlib/RingTheory/PowerSeries/Substitution.lean 6 3 ['github-actions', 'mathlib-dependent-issues', 'mathlib-merge-conflicts'] nobody
20-33566
20 days ago
34-24360
34 days ago
0-1101
18 minutes
38316 tannerduve
author:tannerduve
 feat(Order/OmegaCompletePartialOrder): least fixed point and Scott induction Adds `ContinuousHom.lfp` for endomorphisms on an ωCPO with `⊥`, as the `ωSup` of the iterate chain from `⊥`, together with `map_lfp`, `isFixedPt_lfp`, `lfp_le_fixed`, `isLeast_lfp`, and the Scott induction theorem `lfp_induction` (specialized from a more general seed-based `ωSup_iterate_induction`). For `Part.fix`, adds: * `Part.exists_mem_approx_of_mem_fix`: if `y ∈ Part.fix g x`, some finite approximation of `g` already contains `y`. * `Part.Fix.approx_eq_iterate_bot` and `Part.Fix.approxChain_eq_iterateChain`: bridges between `Fix.approx`/`approxChain` and `f^[n] ⊥`/`iterateChain`. * `Part.fix_eq_lfp`: `Part.fix g = ContinuousHom.lfp (.ofFun g hc)` when `g` is ω-Scott continuous. * `Part.fix_scott_induction`: Scott induction specialized to `Part.fix`. * `Part.fix_induction_mem`: membership induction on `Part.fix`, derived from `fix_scott_induction`. new-contributor 114/0 Mathlib/Control/LawfulFix.lean,Mathlib/Order/OmegaCompletePartialOrder.lean,docs/references.bib 3 2 ['github-actions'] nobody
20-13759
20 days ago
31-76261
31 days ago
31-76498
31 days
38358 yuanyi-350
author:yuanyi-350
 doc(1000.yaml): note more formalised theorems --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) documentation maintainer-merge 9/2 docs/1000.yaml 1 12 ['YaelDillies', 'github-actions', 'grunweg', 'vihdzp', 'yuanyi-350'] nobody
19-43836
19 days ago
19-43898
19 days ago
30-45265
30 days
38634 Maldooor
author:Maldooor
 feat(MeasureTheory): `restrict_absolutelyContinuous_restrict` Adding three lemmas about absolute continuity of restrictions of measures to subsets. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-measure-probability 19/0 Mathlib/MeasureTheory/Measure/Restrict.lean 1 4 ['EtienneC30', 'Maldooor', 'github-actions'] EtienneC30
assignee:EtienneC30
19-42872
19 days ago
19-42872
19 days ago
21-73774
21 days
37252 artie2000
author:artie2000
 feat(Algebra/Group/Submonoid/Support): properties of submonoid support * Prove how the support of a submonoid interacts with various operations --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra awaiting-author
label:t-algebra$
 50/1 Mathlib/Algebra/Group/Submonoid/Support.lean 1 9 ['eric-wieser', 'github-actions', 'themathqueen'] themathqueen
assignee:themathqueen
19-25555
19 days ago
19-25555
19 days ago
37-50338
37 days
37562 IvanRenison
author:IvanRenison
 feat(Combinatorics/SimpleGraph): add several lemmas about when `Walk.bypass` and `Walk.cycleBypass` do nothing Co-authored-by: Vlad Tsyrklevich --- - [ ] depends on: #37577 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-combinatorics blocked-by-other-PR 160/79 Mathlib/Combinatorics/SimpleGraph/Paths.lean,Mathlib/Combinatorics/SimpleGraph/Walk/Basic.lean,Mathlib/Combinatorics/SimpleGraph/Walk/Decomp.lean,Mathlib/Combinatorics/SimpleGraph/Walk/Operations.lean 4 8 ['IvanRenison', 'SnirBroshi', 'github-actions', 'mathlib-dependent-issues', 'mathlib-merge-conflicts', 'vlad902'] nobody
18-85705
18 days ago
18-85706
18 days ago
0-1043
17 minutes
37578 IvanRenison
author:IvanRenison
 feat(Combinatorics/SimpleGraph/Girth): add lemma `Walk.IsCircuit.egirth_le_length` --- - [x] depends on: #37574 - [ ] depends on: #37577 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-combinatorics blocked-by-other-PR 123/79 Mathlib/Combinatorics/SimpleGraph/Girth.lean,Mathlib/Combinatorics/SimpleGraph/Paths.lean,Mathlib/Combinatorics/SimpleGraph/Walk/Basic.lean,Mathlib/Combinatorics/SimpleGraph/Walk/Decomp.lean,Mathlib/Combinatorics/SimpleGraph/Walk/Operations.lean 5 3 ['github-actions', 'mathlib-dependent-issues', 'mathlib-merge-conflicts'] nobody
18-84788
18 days ago
18-84789
18 days ago
0-2051
34 minutes
38890 SnirBroshi
author:SnirBroshi
 feat(Order/ConditionallyCompleteLattice/Basic): more `WithTop` instances Adds the following instances: ``` CompleteLattice α → CompleteLattice (WithTop α) CompleteLinearOrder α → CompleteLinearOrder (WithBot α) ConditionallyCompleteLinearOrder α → ConditionallyCompleteLinearOrder (WithTop α) ConditionallyCompleteLinearOrder α → ConditionallyCompleteLinearOrderBot (WithBot α) ``` and some simp lemmas to help. --- These `#synth`s all succeed after this PR:
(code) ```lean variable {α : Type*} [Preorder α] #synth Preorder αᵒᵈ #synth Preorder <| WithTop α #synth Preorder <| WithBot α #synth Preorder <| WithTopBot α #synth Preorder <| WithBotTop α variable {α : Type*} [PartialOrder α] #synth PartialOrder αᵒᵈ #synth PartialOrder <| WithTop α #synth PartialOrder <| WithBot α #synth PartialOrder <| WithTopBot α #synth PartialOrder <| WithBotTop α variable {α : Type*} [LinearOrder α] #synth LinearOrder αᵒᵈ #synth LinearOrder <| WithTop α #synth LinearOrder <| WithBot α #synth LinearOrder <| WithTopBot α #synth LinearOrder <| WithBotTop α variable {α : Type*} [CompleteLattice α] #synth CompleteLattice αᵒᵈ #synth CompleteLattice <| WithTop α -- new #synth CompleteLattice <| WithBot α #synth CompleteLattice <| WithTopBot α #synth CompleteLattice <| WithBotTop α variable {α : Type*} [CompleteLinearOrder α] #synth CompleteLinearOrder αᵒᵈ #synth CompleteLinearOrder <| WithTop α #synth CompleteLinearOrder <| WithBot α -- new #synth CompleteLinearOrder <| WithTopBot α #synth CompleteLinearOrder <| WithBotTop α variable {α : Type*} [ConditionallyCompleteLattice α] #synth ConditionallyCompleteLattice αᵒᵈ #synth ConditionallyCompleteLattice <| WithTop α #synth ConditionallyCompleteLattice <| WithBot α #synth CompleteLattice <| WithTopBot α #synth CompleteLattice <| WithBotTop α variable {α : Type*} [ConditionallyCompleteLinearOrder α] #synth ConditionallyCompleteLinearOrder αᵒᵈ #synth ConditionallyCompleteLinearOrder <| WithTop α -- new #synth ConditionallyCompleteLinearOrderBot <| WithBot α -- new #synth CompleteLinearOrder <| WithTopBot α #synth CompleteLinearOrder <| WithBotTop α variable {α : Type*} [ConditionallyCompleteLinearOrderBot α] #synth ConditionallyCompleteLinearOrder αᵒᵈ #synth CompleteLinearOrder <| WithTop α #synth ConditionallyCompleteLinearOrderBot <| WithBot α -- new #synth CompleteLinearOrder <| WithTopBot α #synth CompleteLinearOrder <| WithBotTop α ```
[![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) 		t-order 63/9 Mathlib/Order/ConditionallyCompleteLattice/Basic.lean 1 1 ['github-actions'] nobody
18-78558
18 days ago
18-78634
18 days ago
18-78345
18 days
37179 IvanRenison
author:IvanRenison
 feat(Combinatorics/SimpleGraph): add lemmas about left and right elements of `SimpleGraph.sum` --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-combinatorics 18/0 Mathlib/Combinatorics/SimpleGraph/Sum.lean 1 3 ['WilliamCoram', 'github-actions'] b-mehta
assignee:b-mehta
18-74872
18 days ago
58-4282
58 days ago
58-3993
58 days
38875 yuanyi-350
author:yuanyi-350
 refactor(MeasureTheory): golf `Mathlib/MeasureTheory/Covering/Besicovitch` - shortens the proof of `r_t0` in `exists_closedBall_covering_tsum_measure_le` by turning the contradiction argument into a direct lambda - replaces the manual `simp only` proof with `mem_iUnion₂` and a final `simp [r, this]` Extracted from #38104 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) codex LLM-generated t-measure-probability 3/8 Mathlib/MeasureTheory/Covering/Besicovitch.lean 1 2 ['github-actions', 'yuanyi-350'] RemyDegenne
assignee:RemyDegenne
18-74860
18 days ago
19-31994
19 days ago
19-31705
19 days
38881 yuanyi-350
author:yuanyi-350
 refactor(MeasureTheory): golf `Mathlib/MeasureTheory/Function/StronglyMeasurable/Basic` - shortens `stronglyMeasurable_in_set` by inlining the restricted approximation sequence and folding the `hg_eq` / `hg_zero` helper lemmas into the two `by_cases` branches Extracted from #38104 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) codex LLM-generated t-measure-probability 7/13 Mathlib/MeasureTheory/Function/StronglyMeasurable/Basic.lean 1 2 ['github-actions', 'yuanyi-350'] kex-y
assignee:kex-y
18-74856
18 days ago
19-29602
19 days ago
19-29313
19 days
38882 yuanyi-350
author:yuanyi-350
 refactor(MeasureTheory): golf `Mathlib/MeasureTheory/Function/AEMeasurableOrder` - replaces the manual `μ t = 0` to `ae` conversion with `measure_eq_zero_iff_ae_notMem` - rewrites the two density arguments in `aemeasurable_of_exist_almost_disjoint_supersets` using `s_dense.exists_between` and `mem_iUnion₂` Extracted from #38104 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) codex LLM-generated t-measure-probability 7/18 Mathlib/MeasureTheory/Function/AEMeasurableOrder.lean 1 2 ['github-actions', 'yuanyi-350'] kex-y
assignee:kex-y
18-74855
18 days ago
19-29383
19 days ago
19-29094
19 days
38871 0xTerencePrime
author:0xTerencePrime
 feat(Combinatorics/SimpleGraph): add parity lemmas for outer and inner vertices Adds three lemmas to `SimpleGraph.DegreeSum`: - `sum_degrees_option_zmod_two`: the handshaking lemma for `Option I` over ZMod 2 - `degree_none_zmod_two_eq_sum`: simp-normal form of the above - `card_degree_one_option_eq_outer_zmod_two`: under degree bound ≤ 2, count of degree-1 inner vertices equals outer vertex degree mod 2 t-combinatorics new-contributor 65/3 Mathlib/Combinatorics/SimpleGraph/DegreeSum.lean 1 6 ['0xTerencePrime', 'SnirBroshi', 'github-actions'] nobody
18-63244
18 days ago
19-33472
19 days ago
19-33183
19 days
38897 0xTerencePrime
author:0xTerencePrime
 feat(Combinatorics/SetFamily): formalize 1D Sperner's Lemma parity Formalizes the 1-dimensional Sperner's Lemma (parity version): given a coloring of the `n + 1` vertices of a subdivided line segment with two colors (`ZMod 2`), if the two endpoints have different colors, then the number of color-changing edges is odd. This is **distinct** from `IsAntichain.sperner` in `SetFamily.LYM`, which concerns antichains in a power set. This file formalizes the topological/combinatorial parity statement used as the base case in higher-dimensional Sperner arguments. ## Key declarations - `SpernerColoring`: type-safe coloring via `Fin (n + 1) → ZMod 2` - `edgeDiff`: color difference on adjacent vertices, computed in `ZMod 2` - `totalDiff`: telescoping sum of all edge differences - `diffEdges`: the `Finset` of bichromatic (color-changing) edges - `sperner_1d`: main theorem — `Odd (diffEdges c).card` ## Design notes - Using `Fin (n + 1) → ZMod 2` instead of `ℕ → ZMod 2` makes boundary conditions unrepresentable at the type level, eliminating out-of-bounds cases entirely. - The proof reduces to a telescoping sum in `ZMod 2`, using `CharTwo.add_self_eq_zero` to cancel all interior vertices, avoiding parity case splits. This is intended as the 1D base case, the approach generalizes to higher-dimensional Sperner's Lemma in future work. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-combinatorics new-contributor 133/0 Mathlib.lean,Mathlib/Combinatorics/SetFamily/Sperner1D.lean 2 3 ['github-actions', 'grunweg'] nobody
18-54478
18 days ago
18-64628
18 days ago
18-64339
18 days
38750 openendings
author:openendings
 feat(Data/Nat): add padicValNat_add_eq_min Add lemmas for `padicValNat` mirroring the [e]multiplicity API, including - padicValNat_eq_of_dvd_of_not_dvd - padicValNat_add_of_gt - padicValNat_add_eq_min --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-data new-contributor awaiting-author 36/0 Mathlib/Data/Nat/MaxPowDiv.lean 1 7 ['Ruben-VandeVelde', 'github-actions', 'openendings'] nobody
18-51503
18 days ago
18-76999
18 days ago
3-62762
3 days
37724 xgenereux
author:xgenereux
 feat(UniqueFactorizationDomain/Multiplicity): WfDvdMonoid.max_power_factor for finset A version of `WfDvdMonoid.max_power_factor` for finsets/finsupp. That is, we take the highest power which divides everything in the finset. Co-authored-by: María Inés de Frutos Fernández <[mariaines.dff@gmail.com](mailto:mariaines.dff@gmail.com)> --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-ring-theory awaiting-author 66/10 Mathlib/RingTheory/UniqueFactorizationDomain/Multiplicity.lean 1 2 ['chrisflav', 'github-actions'] chrisflav
assignee:chrisflav
18-36617
18 days ago
18-36617
18 days ago
27-34531
27 days
37688 grunweg
author:grunweg
 feat: try using grind as gcongr discharger Let's see what benchmarks say! Also, this exposes some underlying bug in the gcongr discharger handling (which I have worked around in the handful of places hitting it). --- - [x] depends on: #37591 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) awaiting-CI t-meta merge-conflict 73/109 Archive/Imo/Imo1988Q6.lean,Archive/Imo/Imo2019Q4.lean,Archive/Imo/Imo2020Q2.lean,Mathlib/Algebra/Order/BigOperators/GroupWithZero/Finset.lean,Mathlib/Algebra/Order/BigOperators/Ring/Finset.lean,Mathlib/Algebra/Order/BigOperators/Ring/Multiset.lean,Mathlib/Algebra/Order/Field/Basic.lean,Mathlib/Algebra/Order/Ring/Abs.lean,Mathlib/Algebra/Order/Ring/Int.lean,Mathlib/Analysis/Analytic/Basic.lean,Mathlib/Analysis/Calculus/ContDiff/Bounds.lean,Mathlib/Analysis/Calculus/FDeriv/Measurable.lean,Mathlib/Analysis/Calculus/TangentCone/Seq.lean,Mathlib/Analysis/Calculus/Taylor.lean,Mathlib/Analysis/Complex/AbelLimit.lean,Mathlib/Analysis/Complex/BorelCaratheodory.lean,Mathlib/Analysis/Complex/Hadamard.lean,Mathlib/Analysis/Convex/BetweenList.lean,Mathlib/Analysis/Convex/MetricSpace.lean,Mathlib/Analysis/Distribution/Support.lean,Mathlib/Analysis/Fourier/FourierTransformDeriv.lean,Mathlib/Analysis/PSeries.lean,Mathlib/Analysis/Polynomial/MahlerMeasure.lean,Mathlib/Analysis/Real/Pi/Bounds.lean,Mathlib/Analysis/SpecialFunctions/ContinuousFunctionalCalculus/ExpLog/Order.lean,Mathlib/Analysis/SpecialFunctions/Log/Deriv.lean,Mathlib/Analysis/SpecialFunctions/Trigonometric/Chebyshev/Extremal.lean,Mathlib/Analysis/SpecificLimits/FloorPow.lean,Mathlib/Combinatorics/Additive/AP/Three/Behrend.lean,Mathlib/Combinatorics/Additive/VerySmallDoubling.lean,Mathlib/Combinatorics/SimpleGraph/Regularity/Bound.lean,Mathlib/Combinatorics/SimpleGraph/Regularity/Chunk.lean,Mathlib/Computability/Ackermann.lean,Mathlib/Computability/AkraBazzi/GrowsPolynomially.lean,Mathlib/Data/Real/Basic.lean,Mathlib/GroupTheory/Archimedean.lean,Mathlib/MeasureTheory/Covering/BesicovitchVectorSpace.lean,Mathlib/MeasureTheory/Covering/Differentiation.lean,Mathlib/MeasureTheory/Integral/FinMeasAdditive.lean,Mathlib/MeasureTheory/Integral/PeakFunction.lean,Mathlib/NumberTheory/Bertrand.lean,Mathlib/NumberTheory/Harmonic/ZetaAsymp.lean,Mathlib/NumberTheory/LSeries/SumCoeff.lean,Mathlib/NumberTheory/LucasLehmer.lean,Mathlib/NumberTheory/NumberField/Discriminant/Basic.lean,Mathlib/NumberTheory/PellMatiyasevic.lean,Mathlib/NumberTheory/Transcendental/Liouville/Basic.lean,Mathlib/Probability/Distributions/Fernique.lean,Mathlib/Probability/Martingale/Basic.lean,Mathlib/Probability/Moments/CovarianceBilinDual.lean,Mathlib/RingTheory/Spectrum/Prime/ChevalleyComplexity.lean,Mathlib/Tactic/GCongr.lean,Mathlib/Tactic/Positivity/Core.lean,Mathlib/Topology/Algebra/Polynomial.lean,Mathlib/Topology/Instances/ENNReal/Lemmas.lean 55 13 ['JovanGerb', 'github-actions', 'grunweg', 'leanprover-radar', 'mathlib-dependent-issues', 'mathlib-merge-conflicts'] nobody
18-36127
18 days ago
46-49963
46 days ago
0-7
7 seconds
37364 kim-em
author:kim-em
 feat(Tactic/Linter): add `auxLemma` linter for auto-generated declaration references This PR adds a syntax linter that flags explicit references to auto-generated auxiliary declarations such as `_proof_N`, `match_N`, `_match_N`, and `_sizeOf_N`. These names are internal to the Lean elaborator and are not stable across refactors (e.g. reordering fields in a structure can renumber `_proof_` indices). The linter matches precisely: it requires the suffix after the prefix to be all digits, so `_proof_helper` would not be flagged. It only inspects identifier syntax nodes, so references in comments and docstrings are ignored. Current hits in Mathlib (suppressed with `set_option linter.style.auxLemma false`): - `Mathlib/CategoryTheory/Functor/Category.lean` — `hcomp._proof_2` - `Mathlib/Analysis/Calculus/FormalMultilinearSeries.lean` — `constFormalMultilinearSeries.match_1.eq_2` - `Mathlib/Data/List/Sigma.lean` — `_sizeOf_1` Companion PR to track these suppressions in the tech debt report: https://github.com/leanprover-community/mathlib-ci/pull/17 🤖 Prepared with Claude Code t-linter awaiting-author 87/1 Mathlib.lean,Mathlib/Analysis/Calculus/FormalMultilinearSeries.lean,Mathlib/CategoryTheory/Functor/Category.lean,Mathlib/Data/List/Sigma.lean,Mathlib/Init.lean,Mathlib/Tactic.lean,Mathlib/Tactic/Linter/AuxLemma.lean,MathlibTest/CompileInductive.lean,MathlibTest/interactiveUnfold.lean,MathlibTest/toAdditive.lean 10 35 ['github-actions', 'grunweg', 'kim-em', 'leanprover-radar', 'mathlib-merge-conflicts', 'thorimur'] thorimur
assignee:thorimur
18-34123
18 days ago
18-34152
18 days ago
8-22290
8 days
38930 homeowmorphism
author:homeowmorphism
 feat(FinitelyPresentedGroup): quotient of a finitely group by a subgroup which is finitely generated under normal closure is finitely presented Adds `quotient` theorem which states that the quotient of a finitely presented group by a subgroup which is finitely generated in the normal closure is finitely presented. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-group-theory large-import 9/0 Mathlib/GroupTheory/FinitelyPresentedGroup.lean 1 3 ['github-actions', 'homeowmorphism', 'mathlib-bors'] nobody
18-33394
18 days ago
18-33622
18 days ago
0-8
8 seconds
38870 JovanGerb
author:JovanGerb
 chore(Data/Set/Finite/Basic): fix `Fintype ({a} : Set α)` instance This PR fixes a `implicit_reducible` diamond: there were two different instances on `Fintype ({a} : Set α)`. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-data 9/8 Mathlib/Algebra/Group/Pointwise/Finset/Basic.lean,Mathlib/Data/Fintype/Basic.lean,Mathlib/Data/Set/Card.lean,Mathlib/Data/Set/Finite/Basic.lean,Mathlib/Data/Set/Finite/Monad.lean 5 3 ['JovanGerb', 'github-actions', 'sgouezel'] nobody
18-24448
18 days ago
18-23417
18 days ago
1-52
1 day
38002 Raph-DG
author:Raph-DG
 feat(Topology): Relating irreducible components of a space to codimension one points in non dense subsets In this PR we show that the coheight zero points of a sober space (in the specialization order) correspond to the irreducible components. Furthermore, we show that the coheight one points of any non dense subset p of X (in the specialization order on p) have coheight zero in the specialization order on X. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) large-import t-topology 103/0 Mathlib/Order/Hom/Basic.lean,Mathlib/Order/KrullDimension.lean,Mathlib/Order/Minimal.lean,Mathlib/Topology/Inseparable.lean,Mathlib/Topology/Sober.lean 5 3 ['ADedecker', 'github-actions', 'mathlib-merge-conflicts'] urkud
assignee:urkud
18-10936
18 days ago
18-10973
18 days ago
34-76357
34 days
38601 khwilson
author:khwilson
 feat(Topology/Semicontinuity/Hemicontinuity): characterizations of hemicontintuous notions In the previous PR we introduced two new notions attached to correspondences: having open lower sections and having an open graph. This commit introduces several useful characterizations of these notions and uses them to prove several constructions around hemicontinuous maps --- - [ ] depends on: #38600 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-topology blocked-by-other-PR 413/10 Mathlib/Topology/Semicontinuity/Defs.lean,Mathlib/Topology/Semicontinuity/Hemicontinuity.lean 2 3 ['github-actions', 'j-loreaux', 'mathlib-dependent-issues'] nobody
18-8092
18 days ago
24-68338
24 days ago
0-1005
16 minutes
38893 mcdoll
author:mcdoll
 chore: fix diamonds in separation quotient The following two fail on master but succeed on the branch: ``` example [AddMonoid M] [ContinuousAdd M] : instNSMul (M := M) = AddMonoid.toNSMul := by with_reducible_and_instances rfl example [AddGroup G] [IsTopologicalAddGroup G] : instZSMul (G := G) = SubNegMonoid.toZSMul := by with_reducible_and_instances rfl ``` --- I am not sure whether this solution is better, or just deleting the instances. Especially a low-priority `inferInstance` instance seems a bit weird. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-topology awaiting-author 2/2 Mathlib/Topology/Algebra/SeparationQuotient/Basic.lean 1 4 ['eric-wieser', 'github-actions', 'j-loreaux'] nobody
17-84801
17 days ago
17-84801
17 days ago
0-72248
20 hours
38831 kbuzzard
author:kbuzzard
 chore(Algebra/HierarchyDesign): tidy up We don't have `TopologicalField` any more. I've changed it to a more appropriate example. Also, the TODO in this file was ported from mathlib3 which had `topological_ring` and `ordered_ring`; both of these hierarchies have now been decoupled from the algebra hierarchy now. I changed examples to normed examples as this is still not decoupled (and maybe never will be). --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra awaiting-author
label:t-algebra$
 3/3 Mathlib/Algebra/HierarchyDesign.lean 1 3 ['YaelDillies', 'github-actions', 'j-loreaux'] nobody
17-80619
17 days ago
17-80619
17 days ago
2-65409
2 days
32294 jsm28
author:jsm28
 feat(Geometry/Euclidean/Angle/Incenter): distance from second intersection with circumcircle Add the following lemma: given a triangle ABC, suppose an angle bisector from A through the incenter or excenter I meets the circumcircle again at X (including the case of an external bisector at A tangent to the circle, in which case X = A). Then XB = XI (= XC, by applying this lemma again). This is a standard configuration: https://en.wikipedia.org/wiki/Incenter%E2%80%93excenter_lemma --- - [ ] depends on: #30981 - [ ] depends on: #30982 - [ ] depends on: #32019 - [ ] depends on: #32021 - [ ] depends on: #32023 - [ ] depends on: #32270 - [ ] depends on: #32290 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-euclidean-geometry 189/0 Mathlib/Geometry/Euclidean/Angle/Incenter.lean 1 5 ['github-actions', 'jsm28', 'mathlib-dependent-issues', 'mathlib4-merge-conflict-bot', 'peakpoint'] eric-wieser
assignee:eric-wieser
17-75090
17 days ago
56-13344
56 days ago
56-13845
56 days
38049 WilliamCoram
author:WilliamCoram
 feat: lemmas towards showing gaussNorm on MvPowerSeries is an absolute value We prove lemmas: ``gaussNorm_mul_le`` and ``gaussNorm_le_mul`` which will allow us to show it is an absolute value on Mv restricted power series. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-ring-theory new-contributor 144/1 Mathlib/RingTheory/MvPowerSeries/GaussNorm.lean 1 4 ['WilliamCoram', 'github-actions'] alreadydone
assignee:alreadydone
17-75083
17 days ago
38-18028
38 days ago
38-17739
38 days
38883 yuanyi-350
author:yuanyi-350
 refactor(MeasureTheory): golf `Mathlib/MeasureTheory/Function/AEMeasurableSequence` - rewrites `iSup` by filtering directly along `aeSeq_eq_fun_ae hf hp`, instead of proving a subset statement about `aeSeqSet` and then using `measure_mono_null` Extracted from #38104 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) codex LLM-generated t-measure-probability 2/6 Mathlib/MeasureTheory/Function/AEMeasurableSequence.lean 1 2 ['github-actions', 'yuanyi-350'] kex-y
assignee:kex-y
17-75076
17 days ago
19-29164
19 days ago
19-28875
19 days
37714 mortarsanjaya
author:mortarsanjaya
 feat(Algebra/Order/Floor/Defs): `Nat.cast` is strictly monotone in `FloorSemiring` and `FloorRing` As title says, and without the `IsOrderedRing` assumption. Other than that, I removed the `IsOrderedRing` assumption from pretty much all the lemmas in `Algebra/Order/Floor/Defs` that could possibly have this assumption removed, and reduced some `IsStrictOrderedRing` assumptions to `IsOrderedRing` + `Nontrivial`. Due to strict monotonicity, we can also provide `CharZero` instance on `FloorSemiring` and `FloorRing`. Thus we can remove the `NeZero` and `Nontrivial` instances on them. The changes on `/Ring` and `/Semiring` are trivial changes due to some lemmas not requiring an `IsOrderedRing` instance anymore. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra new-contributor
label:t-algebra$
 96/39 Mathlib/Algebra/ContinuedFractions/Computation/Approximations.lean,Mathlib/Algebra/ContinuedFractions/Computation/TerminatesIffRat.lean,Mathlib/Algebra/Order/Floor/Defs.lean,Mathlib/Algebra/Order/Floor/Ring.lean,Mathlib/Algebra/Order/Floor/Semiring.lean 5 24 ['dagurtomas', 'eric-wieser', 'github-actions', 'mathlib-bors', 'mortarsanjaya'] eric-wieser
assignee:eric-wieser
17-59388
17 days ago
21-35159
21 days ago
45-34360
45 days
37062 tannerduve
author:tannerduve
 feat(Computability): Turing join and semilattice structure on Turing degrees ## Summary - Add `Partrec.kronecker` (equality test) and `Partrec.join` (disjoint union by parity) in `Partrec.lean` - Prove `Nat.RecursiveIn` is closed under computable conditionals (`cond_const`, `cond`) - Show each component reduces to the join (`left_le_join`, `right_le_join`) and the join is the least upper bound (`join_le`) - Establish `SemilatticeSup` instance on `TuringDegree` t-computability new-contributor large-import 311/15 Mathlib/Computability/Partrec.lean,Mathlib/Computability/RecursiveIn.lean,Mathlib/Computability/TuringDegree.lean 3 7 ['Komyyy', 'github-actions', 'mathlib-merge-conflicts', 'tannerduve'] Komyyy
assignee:Komyyy
17-59296
17 days ago
39-24290
39 days ago
39-86295
39 days
38170 maddycrim
author:maddycrim
 feat(Algebra/Module/FinitePresentation): Finitely Presented Module Lemma From FLT Project Main Definitions: `Module.FinitePresentation.exists_fin_exact` : A finitely presented module M admits an exact sequence F' -> F -> M -> 0 where F' and F are finite free modules. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra new-contributor awaiting-author
label:t-algebra$
 9/0 Mathlib/Algebra/Module/FinitePresentation.lean 1 17 ['chrisflav', 'github-actions', 'maddycrim', 'themathqueen', 'vlad902'] nobody
17-49834
17 days ago
17-49834
17 days ago
17-43852
17 days
36815 EtienneC30
author:EtienneC30
 feat: a measurable space structure on the type of continuous maps Endow the type `C(X, Y)` of continuous maps from `X` to `Y` with the Borel sigma-algebra coming from the compact-open topology and show that, under some assumptions on `X` and `Y`, this is equal to the restriction of the product sigma-algebra over `X → Y`. Provide a measurable equivalence between `{f : X → Y // Continuous f}` and `C(X, Y)`. Co-authored-by: @RemyDegenne --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-topology brownian t-measure-probability 256/0 Mathlib.lean,Mathlib/MeasureTheory/Constructions/BorelSpace/ContinuousMap.lean,Mathlib/Topology/Bases.lean,Mathlib/Topology/Basic.lean,Mathlib/Topology/Compactness/Compact.lean,Mathlib/Topology/Separation/Regular.lean 6 27 ['ADedecker', 'EtienneC30', 'felixpernegger', 'github-actions', 'mathlib-merge-conflicts'] nobody
17-48591
17 days ago
17-48631
17 days ago
57-43692
57 days
38951 thomaskwaring
author:thomaskwaring
 feat(Order/PrimeSeparator): remove unnecessary hypotheses In `mem_ideal_sup_principal`, boundedness and distributivity were unused, and in `prime_ideal_of_disjoint_filter_ideal`, boundedness was only used to produce an element of the filter `F`, which is already nonempty by definition. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-order new-contributor 9/19 Mathlib/Order/PrimeSeparator.lean 1 2 ['github-actions'] nobody
17-47169
17 days ago
17-47256
17 days ago
17-46967
17 days
37854 JovanGerb
author:JovanGerb
 chore(FieldTheory/SplittingField/Construction): don't expose the construction This PR removes `@[expose] public section` from the implementation of `SplittingField`, so that none of the constants with "aux" in the name are exported. Additionally, remove some defeq abuse. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra merge-conflict
label:t-algebra$
 62/26 Mathlib/FieldTheory/SplittingField/Construction.lean,MathlibTest/instance_diamonds/FieldTheory/SplittingField/Construction.lean 2 3 ['github-actions', 'mathlib-bors', 'mathlib-merge-conflicts'] nobody
17-45942
17 days ago
42-37028
42 days ago
0-1873
31 minutes
38780 yuanyi-350
author:yuanyi-350
 chore(Catalogue PR): kill some `erw`s by adding rfl lemmas --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict 55/29 Mathlib/AlgebraicGeometry/EllipticCurve/Jacobian/Point.lean,Mathlib/AlgebraicGeometry/IdealSheaf/Basic.lean,Mathlib/AlgebraicGeometry/OpenImmersion.lean,Mathlib/AlgebraicGeometry/ProjectiveSpectrum/Basic.lean,Mathlib/LinearAlgebra/BilinearForm/Properties.lean,Mathlib/LinearAlgebra/Eigenspace/Basic.lean,Mathlib/NumberTheory/Padics/PadicNumbers.lean,Mathlib/Topology/UniformSpace/Matrix.lean 8 2 ['github-actions', 'mathlib-merge-conflicts'] nobody
17-45919
17 days ago
20-38477
20 days ago
0-1169
19 minutes
36896 PieterCuijpers
author:PieterCuijpers
 feat (Algebra/Order/Quantale): isMulLeftsided, isMulRightsided, isMulTwosided and strict versions * Adding definitions of quantale elements being leftsided, rightsided, and twosided, and strict versions Should we include these definitions in the main Algebra/Order/Quantale.lean file, or start a separate file for them? I have a few basic theorems I would like to include on these notions, but invite suggestions. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra new-contributor awaiting-author
label:t-algebra$
 81/1 Mathlib/Algebra/Order/Quantale.lean 1 5 ['NoahW314', 'PieterCuijpers', 'chrisflav', 'github-actions'] mariainesdff
assignee:mariainesdff
17-30979
17 days ago
24-23234
24 days ago
39-18222
39 days
38669 dannyply
author:dannyply
 feat(Topology/Algebra/PontryaginDual): prove compact monoids have discrete duals Proves that the Pontryagin dual of a compact monoid is discrete. As a consequence, it also adds the corresponding finite-type instances for compact discrete monoids. This upstreams a result first added downstream in [`YaelDillies/APAP`](https://github.com/YaelDillies/APAP), where this fact was needed to close a `sorry`. The proof separates the trivial character from all the others using the right half of the circle and adds a few reusable `Circle` helper lemmas near the existing related API. The original APAP proof was AI-assisted and then reviewed/rewritten during downstream review. For this PR, I used Codex to help adapt the APAP proof to mathlib and to refactor the supporting lemmas. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-topology new-contributor awaiting-author 130/16 Mathlib/Analysis/SpecialFunctions/Complex/Circle.lean,Mathlib/Topology/Algebra/PontryaginDual.lean,Mathlib/Topology/MetricSpace/Pseudo/Defs.lean 3 27 ['dannyply', 'github-actions', 'j-loreaux', 'tb65536'] j-loreaux
assignee:j-loreaux
17-16064
17 days ago
23-16966
23 days ago
0-75079
20 hours
37446 artie2000
author:artie2000
 refactor(Algebra): uniform API for substructures * Add class for `SetLike` instances whose map preserves meets - the intended interpretation is substructures whose closure properties are preserved under intersection * Abstract out the `CompleteLattice` instance and `closure` adjunction on such instances This change unifies a significant part of the API for algebraic substructures. --- - [x] depends on #32984 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) Original PR: https://github.com/leanprover-community/mathlib4/pull/25963 t-data WIP merge-conflict 721/184 Mathlib.lean,Mathlib/Algebra/Algebra/NonUnitalSubalgebra.lean,Mathlib/Algebra/Group/Submonoid/Basic.lean,Mathlib/Algebra/Group/Submonoid/Defs.lean,Mathlib/Algebra/Group/Subsemigroup/Basic.lean,Mathlib/Algebra/Group/Subsemigroup/Defs.lean,Mathlib/Algebra/Group/Subsemigroup/Membership.lean,Mathlib/Algebra/Group/Subsemigroup/MulOpposite.lean,Mathlib/Algebra/Group/Subsemigroup/Operations.lean,Mathlib/Data/SetLike/Lattice.lean,Mathlib/GroupTheory/Subsemigroup/Centralizer.lean,Mathlib/RingTheory/GradedAlgebra/Homogeneous/Ideal.lean,Mathlib/RingTheory/NonUnitalSubring/Basic.lean,Mathlib/RingTheory/NonUnitalSubsemiring/Basic.lean,Mathlib/Tactic/MkClosureLemmas.lean,Mathlib/Tactic/MkIffOfInductiveProp.lean 16 8 ['artie2000', 'github-actions', 'mathlib-merge-conflicts', 'vihdzp'] nobody
17-8434
17 days ago
51-81126
51 days ago
0-3200
53 minutes
36686 euprunin
author:euprunin
 chore: golf using `grind` The goal of this PR is to decrease the number of times lemmas are called explicitly. Any decrease in compilation time is a welcome side effect, although it is not a primary objective. Trace profiling results (differences <30 ms considered measurement noise): * `List.prod_map_ite`: unchanged 🎉 * `Path.Homotopy.trans_assoc_reparam`: 2938 ms before, 717 ms after 🎉 * `SimplexCategory.δ_comp_δ`: 522 ms before, 316 ms after 🎉 * `Finsupp.ext_iff'`: unchanged 🎉 * `Computation.bind_assoc`: unchanged 🎉 * `Set.piecewise_insert`: unchanged 🎉 * `ZMod.valMinAbs_mem_Ioc`: unchanged 🎉 * `Matrix.det_eq_of_forall_row_eq_smul_add_pred_aux`: 2141 ms before, 2004 ms after 🎉 Profiled using `set_option trace.profiler true in`. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) awaiting-author 11/50 Mathlib/Algebra/BigOperators/Group/List/Basic.lean,Mathlib/AlgebraicTopology/FundamentalGroupoid/Basic.lean,Mathlib/AlgebraicTopology/SimplexCategory/Basic.lean,Mathlib/Data/Finsupp/Defs.lean,Mathlib/Data/Seq/Computation.lean,Mathlib/Data/Set/Piecewise.lean,Mathlib/Data/ZMod/ValMinAbs.lean,Mathlib/LinearAlgebra/Matrix/Determinant/Basic.lean 8 14 ['artie2000', 'chenson2018', 'dagurtomas', 'euprunin', 'github-actions', 'mathlib-merge-conflicts', 'ooovi'] dagurtomas
assignee:dagurtomas
17-7088
17 days ago
17-7091
17 days ago
49-23305
49 days
38973 hyeoniuwu
author:hyeoniuwu
 feat(Computability): define (single oracle) turing reducibility, relate it to RecursiveIn and prove basic jump theorems feat(Computability): define (single oracle) Turing reducibility, relate it to RecursiveIn and prove basic jump theorems Defines Turing reducibility and the jump operator, with total functions (from naturals to naturals) as oracles. Defines codes for basic primitive recursive functions, and the evaluation function. Proves basic reducibility arguments, such as `K0_eq_K` asserting that K0 of an oracle is Turing equivalent to K of an oracle. Our reducibility is related back to `RecursiveIn` as is currently defined in Mathlib via the theorem `SingleReducibleIff`. This is part of a larger repository where more advanced theorems such as KP54 have been proven. (https://github.com/hyeoniuwu/CiL) Co-authored-by: Tanner Duve --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor awaiting-author 4988/0 Mathlib/Computability/SingleOracle/Basic.lean,Mathlib/Computability/SingleOracle/Constructions/Basic.lean,Mathlib/Computability/SingleOracle/Constructions/CovRec.lean,Mathlib/Computability/SingleOracle/Constructions/Dovetail.lean,Mathlib/Computability/SingleOracle/Constructions/Eval.lean,Mathlib/Computability/SingleOracle/Constructions/Eval_Aux.lean,Mathlib/Computability/SingleOracle/Constructions/List.lean,Mathlib/Computability/SingleOracle/Constructions/Meta.lean,Mathlib/Computability/SingleOracle/Constructions/Option.lean,Mathlib/Computability/SingleOracle/Constructions/Primitive.lean,Mathlib/Computability/SingleOracle/Encoding.lean,Mathlib/Computability/SingleOracle/Jump.lean,Mathlib/Computability/SingleOracle/Oracle.lean,Mathlib/Computability/SingleOracle/Order.lean,Mathlib/Computability/SingleOracle/RecursiveIn.lean,Mathlib/Computability/SingleOracle/Reducibilities.lean,Mathlib/Data/Option/Basic.lean,Mathlib/Tactic/Attr/Register.lean,Mathlib/Tactic/Computability/Basic.lean 19 3 ['github-actions', 'grunweg'] nobody
17-2311
17 days ago
unknown
0-0
0 seconds
38942 euprunin
author:euprunin
 chore: golf using `grind` and `simp` The goal of this PR is to decrease the number of times lemmas are called explicitly. Any decrease in compilation time is a welcome side effect, although it is not a primary objective. Trace profiling results (differences <30 ms considered measurement noise): * `CategoryTheory.Abelian.SpectralObject.isZero_H_obj_of_isIso`: 73 ms before, <30 ms after 🎉 * `MvPolynomial.eval₂_uniqueAlgEquiv`: unchanged 🎉 * `Graph.restrict_restrict`: unchanged 🎉 * `SimpleGraph.edge_le_iff`: 86 ms before, 45 ms after 🎉 * `DFinsupp.induction`: unchanged 🎉 * `Finset.Nat.antidiagonal.snd_lt`: unchanged 🎉 * `List.prefix_append_drop`: unchanged 🎉 * `List.pairwise_of_reflexive_of_forall_ne`: unchanged 🎉 * `Relation.reflTransGen_iff_eq_or_transGen`: unchanged 🎉 Profiled using `set_option trace.profiler true in`. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) awaiting-author 9/52 Mathlib/Algebra/Homology/SpectralObject/Page.lean,Mathlib/Algebra/MvPolynomial/Equiv.lean,Mathlib/Combinatorics/Graph/Delete.lean,Mathlib/Combinatorics/SimpleGraph/Operations.lean,Mathlib/Data/DFinsupp/Defs.lean,Mathlib/Data/Finset/NatAntidiagonal.lean,Mathlib/Data/List/Infix.lean,Mathlib/Data/List/Pairwise.lean,Mathlib/Logic/Relation.lean 9 2 ['dagurtomas', 'github-actions'] dagurtomas
assignee:dagurtomas
17-2190
17 days ago
17-2190
17 days ago
0-83701
23 hours
37456 Robertboy18
author:Robertboy18
 feat(LinearAlgebra/AffineSpace): add parallel form of Desargues's theorem This PR adds an affine parallel form of Desargues's theorem, corresponding to entry `87` of the Lean community “100 theorems” list and following the related Rocq/Coq affine-geometry statement. **Main changes** - New file `Mathlib/LinearAlgebra/AffineSpace/Desargues.lean` with `parallel_third_side_of_perspective`. - Add the corresponding `public import` to `Mathlib.lean`. - Update `docs/100.yaml` entry `87` with a note that this is the parallel affine form. **Proof idea** The proof compares side vectors using `exists_eq_smul_of_parallel` for the two given pairs of parallel sides. The shared comparison along `SA` forces the same scalar, which gives parallelism of the third pair of sides. Tests: `lake build Mathlib.LinearAlgebra.AffineSpace.Desargues` AI disclosure: GPT-5.2 Pro was used for assistance with web search/background details about the theorem and for finding useful existing Mathlib lemmas. The theorem statement and Lean formalization were written and checked by hand. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra new-contributor awaiting-author LLM-generated
label:t-algebra$
 133/0 Mathlib.lean,Mathlib/LinearAlgebra/AffineSpace/Desargues.lean 2 17 ['Robertboy18', 'SnirBroshi', 'copilot-pull-request-reviewer', 'eric-wieser', 'github-actions', 'wwylele'] eric-wieser
assignee:eric-wieser
16-85349
16 days ago
43-27097
43 days ago
8-72313
8 days
38667 SnirBroshi
author:SnirBroshi
 feat(Order/Hom/Basic): equivalences of `Order{Hom/Embedding/Iso}` - `OrderHom`s are equivalent to `RelHom`s of `LE` (unlike `OrderEmbedding`/`OrderIso` they aren't defined using it) - Congruence equivs for `OrderEmbedding`/`OrderIso` when the two sides are order-isomorphic. This already exists for `OrderHom`. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-order 55/1 Mathlib/Order/Hom/Basic.lean 1 3 ['SnirBroshi', 'dagurtomas', 'github-actions'] nobody
16-84219
16 days ago
16-84219
16 days ago
23-81451
23 days
38792 openendings
author:openendings
 wip, chore: rename Directed -> Predirected [please-adopt] This **incomplete** PR renames `Directed` to `Predirected`. As [discussed in Zulip](https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/.3E.20complete.20partial.20order.20and.20domain.20theory.20formalization/near/592156927), `Directed` misleadingly mismatches the literature. (The literature says a directed set is nonempty, and we do not.) #### f19d3e79 Rename Directed -> Predirected (class + namespace) Automated changes: - LSP code action renaming `Directed` to `Predirected` - with the affected 69 files open in [lean.nvim](https://github.com/julian/lean.nvim), a series of commands roughly equivalent to ```nvim :bufdo :silent %s/\(theorem \|lemma \|to_dual \)Directed\>/\1Predirected/ge :bufdo :silent %s/\\./Predirected./ge :bufdo :w ``` EDIT: manual changes - one `namespace Directed` replaced. ### Corners cut: - line-length linting has **not** been resolved. - no snake-cased `directed` has been renamed. - only tested via `lake build --old`, plus maybe ten minutes of `lake build` before I (@openendings ) got bored and wanted my CPU back. --- WIP please-adopt t-order [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) please-adopt new-contributor WIP merge-conflict 196/195 Mathlib/Algebra/Algebra/NonUnitalSubalgebra.lean,Mathlib/Algebra/Algebra/Subalgebra/Directed.lean,Mathlib/Algebra/Field/Subfield/Basic.lean,Mathlib/Algebra/Group/Subgroup/Lattice.lean,Mathlib/Algebra/Group/Submonoid/Membership.lean,Mathlib/Algebra/Group/Subsemigroup/Membership.lean,Mathlib/Algebra/Ring/Subring/Basic.lean,Mathlib/Algebra/Ring/Subsemiring/Basic.lean,Mathlib/Algebra/Star/NonUnitalSubalgebra.lean,Mathlib/Analysis/Convex/Basic.lean,Mathlib/Analysis/Convex/Strict.lean,Mathlib/Analysis/InnerProductSpace/Orthonormal.lean,Mathlib/CategoryTheory/Filtered/Basic.lean,Mathlib/Data/Finset/Order.lean,Mathlib/Data/Fintype/Order.lean,Mathlib/Data/Set/Accumulate.lean,Mathlib/Data/Set/Dissipate.lean,Mathlib/Data/Set/Finite/Lattice.lean,Mathlib/Data/Set/Lattice.lean,Mathlib/Data/Set/Lattice/Image.lean,Mathlib/Data/Set/Pairwise/Lattice.lean,Mathlib/Data/Set/UnionLift.lean,Mathlib/Dynamics/PeriodicPts/Lemmas.lean,Mathlib/FieldTheory/CardinalEmb.lean,Mathlib/FieldTheory/Extension.lean,Mathlib/FieldTheory/IntermediateField/Adjoin/Basic.lean,Mathlib/LinearAlgebra/Eigenspace/Basic.lean,Mathlib/LinearAlgebra/LinearIndependent/Lemmas.lean,Mathlib/LinearAlgebra/Span/Defs.lean,Mathlib/Logic/Encodable/Basic.lean,Mathlib/MeasureTheory/Function/SimpleFunc.lean,Mathlib/MeasureTheory/Integral/Lebesgue/Add.lean,Mathlib/MeasureTheory/Integral/Lebesgue/Basic.lean,Mathlib/MeasureTheory/Integral/Lebesgue/Sub.lean,Mathlib/MeasureTheory/Measure/MeasureSpace.lean,Mathlib/MeasureTheory/Measure/Restrict.lean,Mathlib/MeasureTheory/PiSystem.lean,Mathlib/ModelTheory/Satisfiability.lean,Mathlib/ModelTheory/Substructures.lean,Mathlib/ModelTheory/Syntax.lean,Mathlib/Order/CompactlyGenerated/Basic.lean,Mathlib/Order/CompletePartialOrder.lean,Mathlib/Order/ConditionallyCompletePartialOrder/Defs.lean,Mathlib/Order/ConditionallyCompletePartialOrder/Indexed.lean,Mathlib/Order/Directed.lean,Mathlib/Order/Filter/Bases/Basic.lean,Mathlib/Order/Filter/Basic.lean,Mathlib/Order/Filter/Lift.lean,Mathlib/Order/Filter/Map.lean,Mathlib/Order/OmegaCompletePartialOrder.lean,Mathlib/Order/Preorder/Chain.lean,Mathlib/Order/RelIso/Set.lean,Mathlib/Probability/Independence/Basic.lean,Mathlib/Probability/Independence/Conditional.lean,Mathlib/Probability/Independence/Kernel/Indep.lean,Mathlib/Probability/Independence/ZeroOne.lean,Mathlib/Probability/Kernel/Disintegration/CDFToKernel.lean,Mathlib/RingTheory/AlgebraicIndependent/Basic.lean,Mathlib/RingTheory/NonUnitalSubring/Basic.lean,Mathlib/RingTheory/NonUnitalSubsemiring/Basic.lean,Mathlib/Topology/Algebra/Valued/NormedValued.lean,Mathlib/Topology/Category/TopCat/Limits/Konig.lean,Mathlib/Topology/Compactness/Compact.lean,Mathlib/Topology/Compactness/CompactSystem.lean,Mathlib/Topology/Compactness/CountablyCompact.lean,Mathlib/Topology/Semicontinuity/Basic.lean,Mathlib/Topology/Separation/Hausdorff.lean,Mathlib/Topology/Separation/Profinite.lean,Mathlib/Topology/UniformSpace/UniformConvergenceTopology.lean 69 7 ['github-actions', 'kbuzzard', 'mathlib-merge-conflicts', 'openendings'] nobody
16-80738
16 days ago
unknown
0-0
0 seconds
38868 JovanGerb
author:JovanGerb
 feat(GRewrite): strict rewriting This PR is a follow-up to #38318, and implements strict rewriting. Implementation note: The `gcongr` and `grw` tactics need to look up slightly differently in the `@[gcongr]` environment extension, because `gcongr` knows the constant on both sides of the relation, and `grw` only knows one. It would be possible to have two separate maps in the environment for these two use cases. However, I have implemented it with just a single map in the environment, as I think this is more efficient. Note: `lt_of_lt_of_le` and `lt_of_lt_of_le'` are tagged with `gcongr` after `ge_imp_ge_of_le_of_le` and `gt_imp_gt_of_le_of_le` so that they are tried first in `grw`. As a result, strict rewriting is done instead of the old behaviour whenever possible. TODO: tag a few more lemmas with `gcongr strict`. TODO: fix test and add more tests TODO: document `gcongr strict` --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict 725/302 Mathlib/Algebra/BigOperators/Finsupp/Basic.lean,Mathlib/Algebra/Order/Group/Indicator.lean,Mathlib/Algebra/Order/Monoid/Unbundled/Basic.lean,Mathlib/Algebra/Order/Ring/GeomSum.lean,Mathlib/Algebra/Order/Sub/Defs.lean,Mathlib/Analysis/CStarAlgebra/Extreme.lean,Mathlib/Analysis/Convex/MetricSpace.lean,Mathlib/Analysis/Convex/StrictCombination.lean,Mathlib/Analysis/Distribution/Support.lean,Mathlib/Combinatorics/Graph/Maps.lean,Mathlib/Combinatorics/SimpleGraph/Clique.lean,Mathlib/Data/Finsupp/Order.lean,Mathlib/MeasureTheory/Covering/Differentiation.lean,Mathlib/MeasureTheory/Function/SimpleFunc.lean,Mathlib/MeasureTheory/Integral/Average.lean,Mathlib/MeasureTheory/Integral/IntervalIntegral/AbsolutelyContinuousFun.lean,Mathlib/Order/Basic.lean,Mathlib/Probability/Distributions/Gaussian/HasGaussianLaw/Independence.lean,Mathlib/Tactic/GCongr/Core.lean,Mathlib/Tactic/GCongr/CoreAttrs.lean,Mathlib/Tactic/GRewrite/Core.lean,Mathlib/Tactic/GRewrite/Elab.lean,Mathlib/Topology/MetricSpace/ThickenedIndicator.lean,MathlibTest/GCongr/GCongr.lean,MathlibTest/GCongr/implications.lean,MathlibTest/GRewrite.lean 26 3 ['github-actions', 'mathlib-bors', 'mathlib-merge-conflicts'] nobody
16-80735
16 days ago
19-38733
19 days ago
0-507
8 minutes
38977 eric-wieser
author:eric-wieser
 feat: DFinsupp.mapDomain The API for `DFinsupp.mapDomain` is copied from `Finsupp.mapDomain`. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-data 271/0 Mathlib.lean,Mathlib/Data/DFinsupp/Basic.lean,Mathlib/Data/DFinsupp/BigOperators.lean 3 1 ['github-actions'] nobody
16-78880
16 days ago
unknown
0-0
0 seconds
38231 NoneMore
author:NoneMore
 feat(ModelTheory/Definablity): add syntax-to-definability bridge lemmas Add bridge lemmas from syntax to definability and refactor downstream proofs to use them. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-logic 88/56 Mathlib/ModelTheory/Definability.lean,Mathlib/ModelTheory/ElementarySubstructures.lean 2 1 ['github-actions'] fpvandoorn
assignee:fpvandoorn
16-75099
16 days ago
33-60473
33 days ago
33-60184
33 days
38815 dagurtomas
author:dagurtomas
 feat(Tactic/CategoryTheory): extend `@[to_app]` to natural transformations This extends the `@[to_app]` attribute so it also generates componentwise lemmas from equalities of natural transformations between functors, while preserving the existing bicategory behavior. It also ensures generated component lemmas remain usable by dsimp when they are definitionally true. t-category-theory LLM-generated t-meta 148/22 Mathlib/Tactic/CategoryTheory/ToApp.lean,Mathlib/Util/AddRelatedDecl.lean,MathlibTest/CategoryTheory/ToApp.lean 3 1 ['github-actions'] kim-em
assignee:kim-em
16-75093
16 days ago
21-14888
21 days ago
21-14653
21 days
38980 thorimur
author:thorimur
 bench: `haveI'` -> `have` --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) 131/131 Mathlib/Algebra/Order/Field/Power.lean,Mathlib/NumberTheory/LucasLehmer.lean,Mathlib/Tactic/ModCases.lean,Mathlib/Tactic/NormNum/Basic.lean,Mathlib/Tactic/NormNum/BigOperators.lean,Mathlib/Tactic/NormNum/DivMod.lean,Mathlib/Tactic/NormNum/Eq.lean,Mathlib/Tactic/NormNum/GCD.lean,Mathlib/Tactic/NormNum/Ineq.lean,Mathlib/Tactic/NormNum/Inv.lean,Mathlib/Tactic/NormNum/LegendreSymbol.lean,Mathlib/Tactic/NormNum/OfScientific.lean,Mathlib/Tactic/NormNum/Ordinal.lean,Mathlib/Tactic/NormNum/Pow.lean,Mathlib/Tactic/NormNum/Prime.lean,Mathlib/Tactic/Positivity/Basic.lean,Mathlib/Tactic/Positivity/Core.lean,Mathlib/Tactic/ReduceModChar.lean 18 4 ['eric-wieser', 'github-actions', 'leanprover-radar', 'thorimur'] nobody
16-56230
16 days ago
unknown
0-0
0 seconds
38009 CBirkbeck
author:CBirkbeck
 feat(RingTheory/Valuation): define the valuation spectrum and its topology ## Summary Define the valuation spectrum `Spv A` of a commutative ring and equip it with the topology generated by basic open sets, following Wedhorn's *Adic Spaces*. Also define the pullback (`comap`) of a `ValuativeRel` along a ring homomorphism. This is preparation for later defining adic spaces. Note the code was generated by claude code, but I have cleaned up and pre-reviewed the work. t-ring-theory LLM-generated 362/0 Mathlib.lean,Mathlib/RingTheory/Valuation/ValuationSpectrum.lean,Mathlib/RingTheory/Valuation/ValuativeRel/Comap.lean 3 40 ['CBirkbeck', 'adamtopaz', 'chrisflav', 'dagurtomas', 'faenuccio', 'github-actions', 'jjdishere', 'riccardobrasca'] riccardobrasca
assignee:riccardobrasca
16-54230
16 days ago
38-36147
38 days ago
38-36011
38 days
38922 yuanyi-350
author:yuanyi-350
 chore(CategoryTheory/Triangulated/Pretriangulated): remove an erw - rewrites the `isIso₂_of_isIso₁₃` proof by using `Triangle.invRotate_mor₂` directly in the rewrite chain - shortens `productTriangle_distinguished` by rewriting `productTriangle.π_hom₃` explicitly instead of using `erw` Extracted from #38415 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) codex LLM-generated t-category-theory awaiting-author 5/4 Mathlib/CategoryTheory/Triangulated/Pretriangulated.lean 1 3 ['github-actions', 'joelriou'] nobody
16-53399
16 days ago
18-19506
18 days ago
0-20200
5 hours
38557 SnirBroshi
author:SnirBroshi
 feat(Order/Monotone/Defs): weaken `Preorder` to `LE`/`LT` `Monotone`/`Antitone`/`MonotoneOn`/`AntitoneOn` can use any `LE`, and `StrictMono`/`StrictAnti`/`StrictMonoOn`/`StrictAntiOn` can use any `LT`. This makes it necessary to add some explicit type params (e.g. `(α := α)`) in some places that use monotone-related theorems (e.g. `Function.monotone_eval`). --- Currently `OrderEmbedding` and `OrderIso` can use `LE` but `OrderHom` requires `Preorder` because it's defined using `Monotone`. Generalizing `Monotone` and friends will let us fix this oddity. This follows other basic definitions such as `IsMax`/`CovBy`. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-order 21/15 Mathlib/Analysis/BoxIntegral/Box/Basic.lean,Mathlib/Data/Finsupp/Lex.lean,Mathlib/Data/Finsupp/MonomialOrder/DegLex.lean,Mathlib/Order/Interval/Lex.lean,Mathlib/Order/Monotone/Defs.lean,Mathlib/RingTheory/MvPowerSeries/Trunc.lean,Mathlib/Topology/Order/MonotoneConvergence.lean 7 2 ['JovanGerb', 'github-actions'] nobody
16-46416
16 days ago
25-76417
25 days ago
25-78959
25 days
38561 mcdoll
author:mcdoll
 feat: use `Is*Apply` classes for continuous linear maps --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict 912/416 Mathlib.lean,Mathlib/Algebra/BigOperators/Pi.lean,Mathlib/Algebra/Category/ModuleCat/Topology/Homology.lean,Mathlib/Algebra/Module/CharacterModule.lean,Mathlib/Algebra/Polynomial/HasseDeriv.lean,Mathlib/Analysis/Analytic/Binomial.lean,Mathlib/Analysis/Analytic/IteratedFDeriv.lean,Mathlib/Analysis/CStarAlgebra/Multiplier.lean,Mathlib/Analysis/CStarAlgebra/Unitization.lean,Mathlib/Analysis/Calculus/ContDiff/FaaDiBruno.lean,Mathlib/Analysis/Calculus/ContDiff/Operations.lean,Mathlib/Analysis/Calculus/Darboux.lean,Mathlib/Analysis/Calculus/Deriv/Add.lean,Mathlib/Analysis/Calculus/Deriv/Basic.lean,Mathlib/Analysis/Calculus/Deriv/CompMul.lean,Mathlib/Analysis/Calculus/Deriv/Mul.lean,Mathlib/Analysis/Calculus/FDeriv/Add.lean,Mathlib/Analysis/Calculus/FDeriv/Analytic.lean,Mathlib/Analysis/Calculus/FDeriv/Basic.lean,Mathlib/Analysis/Calculus/FDeriv/Mul.lean,Mathlib/Analysis/Calculus/FDeriv/Norm.lean,Mathlib/Analysis/Calculus/FDeriv/Symmetric.lean,Mathlib/Analysis/Calculus/FormalMultilinearSeries.lean,Mathlib/Analysis/Calculus/Implicit.lean,Mathlib/Analysis/Calculus/UniformLimitsDeriv.lean,Mathlib/Analysis/Calculus/VectorField.lean,Mathlib/Analysis/Complex/CauchyIntegral.lean,Mathlib/Analysis/Complex/Harmonic/Analytic.lean,Mathlib/Analysis/Convex/Birkhoff.lean,Mathlib/Analysis/Convex/DoublyStochasticMatrix.lean,Mathlib/Analysis/Convex/Exposed.lean,Mathlib/Analysis/Convolution.lean,Mathlib/Analysis/Distribution/ContDiffMapSupportedIn.lean,Mathlib/Analysis/Distribution/SchwartzSpace/Basic.lean,Mathlib/Analysis/Distribution/SchwartzSpace/Deriv.lean,Mathlib/Analysis/Fourier/FourierTransform.lean,Mathlib/Analysis/Fourier/FourierTransformDeriv.lean,Mathlib/Analysis/InnerProductSpace/Adjoint.lean,Mathlib/Analysis/InnerProductSpace/ConformalLinearMap.lean,Mathlib/Analysis/InnerProductSpace/Dual.lean,Mathlib/Analysis/InnerProductSpace/LinearMap.lean,Mathlib/Analysis/InnerProductSpace/Positive.lean,Mathlib/Analysis/InnerProductSpace/Projection/Basic.lean,Mathlib/Analysis/InnerProductSpace/Projection/FiniteDimensional.lean,Mathlib/Analysis/InnerProductSpace/Rayleigh.lean,Mathlib/Analysis/InnerProductSpace/Reproducing.lean,Mathlib/Analysis/InnerProductSpace/StarOrder.lean,Mathlib/Analysis/LocallyConvex/PointwiseConvergence.lean,Mathlib/Analysis/LocallyConvex/Separation.lean,Mathlib/Analysis/Normed/Algebra/GelfandFormula.lean,Mathlib/Analysis/Normed/Group/SeparationQuotient.lean,Mathlib/Analysis/Normed/Module/Alternating/Uncurry/Fin.lean,Mathlib/Analysis/Normed/Module/Bases.lean,Mathlib/Analysis/Normed/Module/Basic.lean,Mathlib/Analysis/Normed/Module/Multilinear/Basic.lean,Mathlib/Analysis/Normed/Operator/Basic.lean,Mathlib/Analysis/Normed/Operator/Bilinear.lean,Mathlib/Analysis/Normed/Operator/Compact.lean,Mathlib/Analysis/Normed/Operator/ContinuousAlgEquiv.lean,Mathlib/Analysis/Normed/Operator/Mul.lean,Mathlib/Analysis/Normed/Unbundled/FiniteExtension.lean,Mathlib/Analysis/SpecialFunctions/Exponential.lean,Mathlib/Analysis/SpecialFunctions/Pow/Deriv.lean,Mathlib/Data/FunLike/Group.lean,Mathlib/Data/FunLike/IsApply.lean,Mathlib/Data/FunLike/Module.lean,Mathlib/Data/FunLike/MonoidWithZero.lean,Mathlib/Data/FunLike/Ring.lean,Mathlib/Data/Matrix/PEquiv.lean,Mathlib/Geometry/Euclidean/Volume/Measure.lean,Mathlib/Geometry/Manifold/IntegralCurve/Basic.lean,Mathlib/LinearAlgebra/Eigenspace/ContinuousLinearMap.lean,Mathlib/LinearAlgebra/Matrix/Polynomial.lean,Mathlib/LinearAlgebra/QuadraticForm/Dual.lean,Mathlib/MeasureTheory/Function/ConditionalExpectation/CondexpL1.lean,Mathlib/MeasureTheory/Function/ConditionalExpectation/CondexpL2.lean,Mathlib/MeasureTheory/Function/Jacobian.lean,Mathlib/MeasureTheory/Function/JacobianOneDim.lean,Mathlib/MeasureTheory/Function/LpSpace/Basic.lean,Mathlib/MeasureTheory/Group/Prod.lean,Mathlib/MeasureTheory/Integral/Bochner/L1.lean,Mathlib/MeasureTheory/Integral/FinMeasAdditive.lean,Mathlib/MeasureTheory/Integral/IntervalIntegral/Basic.lean,Mathlib/MeasureTheory/Integral/Lebesgue/Basic.lean,Mathlib/MeasureTheory/Measure/Haar/DistribChar.lean,Mathlib/MeasureTheory/Measure/Haar/MulEquivHaarChar.lean,Mathlib/MeasureTheory/Measure/Typeclasses/Finite.lean,Mathlib/MeasureTheory/VectorMeasure/Decomposition/Hahn.lean,Mathlib/MeasureTheory/VectorMeasure/Decomposition/Jordan.lean,Mathlib/NumberTheory/ModularForms/CongruenceSubgroups.lean,Mathlib/NumberTheory/NumberField/CanonicalEmbedding/Basic.lean,Mathlib/NumberTheory/Padics/PadicNumbers.lean,Mathlib/NumberTheory/SiegelsLemma.lean,Mathlib/Probability/Distributions/Uniform.lean,Mathlib/Probability/Moments/Variance.lean,Mathlib/Topology/Algebra/Module/LinearMap.lean,Mathlib/Topology/Algebra/Module/LinearMapPiProd.lean,Mathlib/Topology/Algebra/Module/Multilinear/Basic.lean,Mathlib/Topology/Algebra/Module/Spaces/ContinuousLinearMap.lean,Mathlib/Topology/Algebra/Module/Spaces/UniformConvergenceCLM.lean 101 4 ['Vierkantor', 'github-actions', 'mathlib-merge-conflicts'] nobody
16-41697
16 days ago
unknown
0-0
0 seconds
38037 linesthatinterlace
author:linesthatinterlace
 feat: extend `LawfulXor` lemmas and add `Equiv.xor` This PR extends the work of #37712 by adding additional lemmas and adding `xor-as-a-permutation`. --- - [ ] depends on: #37712 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-data blocked-by-other-PR 270/0 Mathlib.lean,Mathlib/Data/Fin/Init.lean,Mathlib/Data/LawfulXor/Basic.lean,Mathlib/Data/LawfulXor/Equiv.lean 4 4 ['github-actions', 'linesthatinterlace', 'mathlib-dependent-issues'] linesthatinterlace
assignee:linesthatinterlace
16-41595
16 days ago
16-41596
16 days ago
21-80359
21 days
37310 CoolRmal
author:CoolRmal
 feat(MeasureTheory): uniformly distributed outer regular measures in a second countable pseudometric space are unique up to a finite constant In this PR we define uniformly distributed measures and prove [Christensen's Lemma](https://en.wikipedia.org/wiki/Spherical_measure), which says that uniformly distributed outer regular measures in a second countable pseudometric space are unique up to a finite constant. A classical application of Christensen's Lemma is to show that the restriction of the `n - 1`-dimensional Hausdorff measure onto an `n`-dimensional sphere coincides with the spherical measure. This will be done in another PR. --- - [x] depends on: #37311 - [x] depends on: #37312 - [x] depends on: #37313 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-measure-probability 201/1 Mathlib.lean,Mathlib/MeasureTheory/Measure/Regular.lean,Mathlib/MeasureTheory/Measure/UniformlyDistributed.lean,Mathlib/Order/LiminfLimsup.lean 4 17 ['CoolRmal', 'github-actions', 'mathlib-dependent-issues', 'mathlib-merge-conflicts', 'wwylele'] RemyDegenne
assignee:RemyDegenne
16-33715
16 days ago
17-76829
17 days ago
21-20436
21 days
38960 ajhendel
author:ajhendel
 chore: remove ℕ+ interval_cases workaround in ADEInequality `interval_cases` now supports `ℕ+`, so the manual `Finset.mem_Iio`/`Finset.mem_Ico` + `conv` + `fin_cases` workaround (marked with a porting note) is no longer needed. Replaces three 3-4 line workaround blocks with `interval_cases p`/`q`/`r`. t-number-theory new-contributor awaiting-CI 3/10 Mathlib/NumberTheory/ADEInequality.lean 1 2 ['github-actions'] nobody
16-33530
16 days ago
17-34462
17 days ago
0-105
1 minute
38989 grunweg
author:grunweg
 chore: remove `(d)simp only []` Either remove them (when they were unnecessary), or replace by something more low-level. --- I'm happy to make them `simp only` instead, if that is preferred. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) 10/17 Counterexamples/AharoniKorman.lean,Mathlib/Analysis/SpecialFunctions/Integrals/PosLogEqCircleAverage.lean,Mathlib/CategoryTheory/Limits/Fubini.lean,Mathlib/Computability/PartrecCode.lean,Mathlib/Computability/RE.lean,Mathlib/Computability/TuringMachine/Config.lean,Mathlib/Computability/TuringMachine/StackTuringMachine.lean,Mathlib/LinearAlgebra/Matrix/Basis.lean,Mathlib/MeasureTheory/Covering/Besicovitch.lean,Mathlib/MeasureTheory/Measure/Restrict.lean,Mathlib/ModelTheory/Encoding.lean 11 4 ['b-mehta', 'github-actions', 'grunweg'] nobody
16-33258
16 days ago
16-48526
16 days ago
16-48237
16 days
38979 ldct
author:ldct
 feat(EReal): simplify nat + ⊤ Alternative version of https://github.com/leanprover-community/mathlib4/pull/38975 --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-data 28/2 Mathlib/Data/EReal/Basic.lean,Mathlib/Data/EReal/Operations.lean,MathlibTest/EReal.lean 3 6 ['SnirBroshi', 'eric-wieser', 'github-actions', 'ldct', 'leanprover-radar'] nobody
16-28101
16 days ago
16-27867
16 days ago
16-27708
16 days
37955 artie2000
author:artie2000
 feat(Algebra/Polynomial): lemmas about `modByMonic` * Add various small lemmas about `Polynomial.modByMonic` * Remove unneccesary commutativity assumption on `Polynomial.aeval_eq_zero_of_dvd_aeval_eq_zero` by proving `Polynomial.aeval_dvd` --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra delegated
label:t-algebra$
 20/6 Mathlib/Algebra/Polynomial/AlgebraMap.lean,Mathlib/Algebra/Polynomial/Div.lean,Mathlib/Algebra/Polynomial/RingDivision.lean,Mathlib/FieldTheory/Minpoly/Basic.lean,Mathlib/RingTheory/Polynomial/IsIntegral.lean 5 4 ['github-actions', 'mathlib-bors', 'ocfnash'] ocfnash
assignee:ocfnash
16-5656
16 days ago
16-5656
16 days ago
24-18920
24 days
38136 homeowmorphism
author:homeowmorphism
 feat(FinitelyPresentedGroup): add definitional equivalence with generating set given by `S : Set G`. A group `G` is finitely presented if and only if it admits a finite generating set given by `S : Set G` such that the canonical inclusion map is surjective and the kernel is finitely generated as a normal subgroup. --- Co-pilot + Gemini Pro 3.1 was used for assistance. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-group-theory 40/0 Mathlib/GroupTheory/FinitelyPresentedGroup.lean 1 7 ['copilot-pull-request-reviewer', 'github-actions', 'homeowmorphism', 'mathlib-bors', 'mathlib-merge-conflicts'] nobody
15-78077
15 days ago
35-84173
35 days ago
0-17
17 seconds
38885 yuanyi-350
author:yuanyi-350
 refactor(MeasureTheory): golf `Mathlib/MeasureTheory/Function/LpOrder` - rewrites `coeFn_nonneg` to use the `Lp.coeFn_zero` eventual equality directly via `trans_le`, instead of a separate `filter_upwards` proof Extracted from #38104 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) codex LLM-generated t-measure-probability 1/4 Mathlib/MeasureTheory/Function/LpOrder.lean 1 2 ['github-actions', 'yuanyi-350'] RemyDegenne
assignee:RemyDegenne
15-74882
15 days ago
19-28731
19 days ago
19-28442
19 days
38886 yuanyi-350
author:yuanyi-350
 refactor(MeasureTheory): golf `Mathlib/MeasureTheory/Function/SimpleFuncDenseLp` - rewrites `measure_preimage_lt_top_of_memLp` via `FinMeasSupp.of_lintegral_ne_top` and `FinMeasSupp.map_iff`, instead of expanding `eLpNorm'` and splitting through `ENNReal.mul_lt_top_iff` Extracted from #38104 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) codex LLM-generated t-measure-probability 9/21 Mathlib/MeasureTheory/Function/SimpleFuncDenseLp.lean 1 2 ['github-actions', 'yuanyi-350'] RemyDegenne
assignee:RemyDegenne
15-74881
15 days ago
19-28523
19 days ago
19-28234
19 days
39004 zhuyizheng
author:zhuyizheng
 chore(ModelTheory): fix hypo of `realize_liftAt` changes the hypo of `realize_liftAt` from the incorrect `(hmn : m + n' ≤ n + 1)` to the correct `(hmn : m ≤ n)` --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-logic 2/2 Mathlib/ModelTheory/Semantics.lean 1 3 ['github-actions', 'plp127', 'zhuyizheng'] nobody
15-74730
15 days ago
16-24459
16 days ago
16-24170
16 days
38310 ZRTMRH
author:ZRTMRH
 feat(Combinatorics/Quiver/Schreier): word evaluation and reachability Adds word evaluation and reachability results to the Schreier graph API. * `SchreierGraph.evalWord` : evaluates a word `List (S × Bool)` as an element of the ambient group, where `(s, true)` contributes `ι s` and `(s, false)` contributes `(ι s)⁻¹`. * `SchreierGraph.evalWord_eq_lift` : agreement with `FreeGroup.lift`. * `SchreierGraph.evalWord_mem_closure` : every word evaluates into the subgroup generated by `ι`. * `SchreierGraph.pathFromWord` : a Bool-tagged word yields a path in `Symmetrify (SchreierGraph V ι)` from `x` to `evalWord ι w • x`. * `SchreierGraph.reachable_iff` : two vertices are connected by a path in the symmetrification iff some element of the subgroup closure carries one to the other. Follow-up to #36320. This PR was written with AI assistance (Claude). The code has been reviewed by the author. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor t-combinatorics large-import LLM-generated 157/0 Mathlib/Combinatorics/Quiver/Schreier.lean 1 2 ['github-actions'] nobody
15-61184
15 days ago
32-8258
32 days ago
32-7969
32 days
38873 yuanyi-350
author:yuanyi-350
 refactor(MeasureTheory): golf `Mathlib/MeasureTheory/Constructions/BorelSpace/Real` - rewrites `measurable_const_mul` by splitting off the `c = 0` case and proving the nonzero case via `measurable_of_continuousOn_compl_singleton` - replaces the ad hoc case analysis on `⊥`, `⊤`, and real coefficients with a direct continuity argument for multiplication on `EReal` Extracted from #38104 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) codex LLM-generated t-measure-probability 5/19 Mathlib/MeasureTheory/Constructions/BorelSpace/Real.lean 1 3 ['LorenzoLuccioli', 'github-actions', 'yuanyi-350'] kex-y
assignee:kex-y
15-58994
15 days ago
15-78304
15 days ago
19-2724
19 days
39023 TBUGTB
author:TBUGTB
 feat(Algebra/Order): API lemmas on floor and abs Co-authored-by: Etienne Marion @EtienneC30 --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra brownian new-contributor
label:t-algebra$
 9/0 Mathlib/Algebra/Order/Floor/Semiring.lean,Mathlib/Algebra/Order/Ring/Abs.lean 2 3 ['TBUGTB', 'github-actions'] nobody
15-42910
15 days ago
15-46099
15 days ago
15-45810
15 days
39029 felixpernegger
author:felixpernegger
 chore: remove redundant `unfold`s This PR removed roughly (estimated by files I went through) half of the `unfold`'s in mathlib which can be removed such that the proof still works (found by searching `unfold ` in VSCode in manually going through ~600/1100 occurences). I originally planned to replace all, but I couldn't find any relevant discussion if this is actually a good practice, so to save potentially wasted time, I make this PR now. (similarly with the `clear` tactic) --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) 63/108 Archive/Imo/Imo1994Q1.lean,Archive/Imo/Imo1998Q2.lean,Archive/Imo/Imo2001Q5.lean,Archive/Wiedijk100Theorems/BuffonsNeedle.lean,Mathlib/Algebra/EuclideanDomain/Basic.lean,Mathlib/Algebra/MvPolynomial/Variables.lean,Mathlib/Algebra/Order/Floor/Ring.lean,Mathlib/AlgebraicGeometry/GammaSpecAdjunction.lean,Mathlib/AlgebraicTopology/SimplexCategory/Basic.lean,Mathlib/AlgebraicTopology/SimplicialSet/Coskeletal.lean,Mathlib/Analysis/Asymptotics/SuperpolynomialDecay.lean,Mathlib/Analysis/Complex/JensenFormula.lean,Mathlib/Analysis/Convex/Strict.lean,Mathlib/Analysis/InnerProductSpace/Calculus.lean,Mathlib/Analysis/InnerProductSpace/GramSchmidtOrtho.lean,Mathlib/Analysis/InnerProductSpace/PiL2.lean,Mathlib/Analysis/SpecialFunctions/ContinuousFunctionalCalculus/Rpow/Basic.lean,Mathlib/Analysis/SpecialFunctions/Trigonometric/Chebyshev/Orthogonality.lean,Mathlib/CategoryTheory/Functor/Flat.lean,Mathlib/CategoryTheory/Functor/FullyFaithful.lean,Mathlib/CategoryTheory/Monoidal/Closed/Functor.lean,Mathlib/Combinatorics/Enumerative/Partition/Basic.lean,Mathlib/Combinatorics/Graph/Delete.lean,Mathlib/Computability/PartrecCode.lean,Mathlib/Computability/RegularExpressions.lean,Mathlib/Computability/TuringMachine/PostTuringMachine.lean,Mathlib/Computability/TuringMachine/StackTuringMachine.lean,Mathlib/Condensed/Light/TopCatAdjunction.lean,Mathlib/Data/Fintype/EquivFin.lean,Mathlib/Data/Fintype/List.lean,Mathlib/Data/Int/GCD.lean,Mathlib/Data/List/Intervals.lean,Mathlib/Data/Matrix/Basis.lean,Mathlib/Data/Nat/BinaryRec.lean,Mathlib/Data/Nat/ChineseRemainder.lean,Mathlib/Data/Nat/Digits/Div.lean,Mathlib/Data/Nat/Dist.lean,Mathlib/Data/Ordmap/Ordset.lean,Mathlib/Data/PNat/Prime.lean,Mathlib/Data/Real/Embedding.lean,Mathlib/Data/Seq/Defs.lean,Mathlib/Data/Stream/Init.lean,Mathlib/Data/WSeq/Basic.lean,Mathlib/Data/ZMod/Basic.lean 44 3 ['felixpernegger', 'github-actions', 'leanprover-radar'] nobody
15-36029
15 days ago
15-40616
15 days ago
15-40327
15 days
38702 jcommelin
author:jcommelin
 chore(Data/Real): encapsulate real numbers This PR: * hides the definition of the real numbers * preserves defeqs when casting `Nat`, `Int`, `Rat`, into the reals * preserves the defeq `x - y = x + (-y)` for `x y : Real` * removes a bunch of technical debt * adjusts imports in the library, where files relied on getting access to Cauchy sequences transitively via importing the reals. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) delegated 235/256 Archive/Imo/Imo2013Q5.lean,Counterexamples/SeminormLatticeNotDistrib.lean,Mathlib.lean,Mathlib/Analysis/Complex/Norm.lean,Mathlib/Analysis/RCLike/Basic.lean,Mathlib/Analysis/Real/Cardinality.lean,Mathlib/Combinatorics/SimpleGraph/Triangle/Counting.lean,Mathlib/Data/Complex/Basic.lean,Mathlib/Data/ENNReal/Basic.lean,Mathlib/Data/NNReal/Defs.lean,Mathlib/Data/Real/Archimedean.lean,Mathlib/Data/Real/Basic.lean,Mathlib/Data/Real/Cauchy.lean,Mathlib/Data/Real/Sign.lean,Mathlib/NumberTheory/Padics/PadicIntegers.lean,Mathlib/NumberTheory/Padics/PadicNumbers.lean,Mathlib/NumberTheory/SelbergSieve.lean,Mathlib/Topology/Algebra/Ring/Real.lean,Mathlib/Topology/Instances/Real/Lemmas.lean,Mathlib/Topology/MetricSpace/CauSeqFilter.lean,Mathlib/Topology/UniformSpace/CompareReals.lean,Mathlib/Topology/UniformSpace/Real.lean,MathlibTest/Complex.lean,MathlibTest/Quaternion.lean,MathlibTest/Real.lean,MathlibTest/peel.lean 26 31 ['JovanGerb', 'Kha', 'YaelDillies', 'eric-wieser', 'fpvandoorn', 'github-actions', 'jcommelin', 'leanprover-radar', 'mathlib-bors', 'riccardobrasca', 'sgouezel', 'wkrozowski'] nobody
15-33273
15 days ago
23-35623
23 days ago
0-2637
43 minutes
38374 idontgetoutmuch
author:idontgetoutmuch
 Principal Bundles, Connection 1-forms and the Frame Bundle --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-differential-geometry new-contributor 2017/0 Mathlib/Geometry/Manifold/Algebra/FakeFormII.lean,Mathlib/Geometry/Manifold/Algebra/PrincipalGBundle.lean,Mathlib/Geometry/Manifold/Algebra/SmoothLieExp.lean 3 2 ['github-actions'] nobody
15-32127
15 days ago
unknown
0-0
0 seconds
38781 JovanGerb
author:JovanGerb
 feat: instance diamond linter --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-linter 111/4 Mathlib.lean,Mathlib/CategoryTheory/Action/Concrete.lean,Mathlib/CategoryTheory/Limits/Shapes/ConcreteCategory.lean,Mathlib/FieldTheory/IntermediateField/Basic.lean,Mathlib/Tactic.lean,Mathlib/Tactic/Linter/InstanceDiamonds.lean 6 2 ['github-actions', 'mathlib-bors'] nobody
15-26849
15 days ago
22-21428
22 days ago
0-12
12 seconds
38194 ryanncode
author:ryanncode
 feat(LinearAlgebra/BilinearForm): add indefinite metrics Add the `IndefiniteMetric` structure to support vector spaces equipped with a non-degenerate, symmetric, indefinite bilinear form. Provide the algebraic foundation for indefinite inner product spaces by formalizing the metric via `LinearMap.BilinForm` and extracting its associated quadratic form without enforcing the `IsPosSemidef` typeclass. Previously, mathlib required strictly positive-definite metrics to instantiate inner product spaces (`InnerProductSpace`), which prevented the formalization of indefinite geometries without causing typeclass inference failures. Bridge this gap by isolating the symmetric bilinear form from topological and positivity constraints, allowing the library to handle generalized indefinite metric spaces safely. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra new-contributor awaiting-author
label:t-algebra$
 47/0 Mathlib.lean,Mathlib/LinearAlgebra/BilinearForm/IndefiniteMetric.lean 2 4 ['dagurtomas', 'github-actions', 'mathlib-merge-conflicts'] nobody
15-24452
15 days ago
15-24452
15 days ago
15-56169
15 days
37023 xroblot
author:xroblot
 feat(NumberTheory/NumberField): linear disjointness from coprime discriminants The key new result is `dvd_discr_iff_dvd_discr_normalClosure`: a prime `p` divides `discr K` if and only if it divides the discriminant of the normal closure of `K` over `ℚ`. Thanks to this result, we generalize `linearDisjoint_of_isGalois_isCoprime_discr` by removing the Galois hypothesis: if K₁ and K₂ are number fields with coprime discriminants, then they are linearly disjoint over ℚ. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) - [ ] depends on: #36843 - [ ] depends on: #30666 merge-conflict blocked-by-other-PR 1575/57 Mathlib.lean,Mathlib/Algebra/Algebra/Hom.lean,Mathlib/Algebra/Group/Subgroup/Basic.lean,Mathlib/Algebra/GroupWithZero/Action/TransferInstance.lean,Mathlib/Algebra/Ring/Int/Field.lean,Mathlib/FieldTheory/Galois/Basic.lean,Mathlib/FieldTheory/Galois/IsGaloisGroup.lean,Mathlib/FieldTheory/IntermediateField/Algebraic.lean,Mathlib/FieldTheory/IntermediateField/ExtendTop.lean,Mathlib/FieldTheory/Normal/Defs.lean,Mathlib/GroupTheory/QuotientGroup/Basic.lean,Mathlib/GroupTheory/QuotientGroup/Defs.lean,Mathlib/NumberTheory/NumberField/Basic.lean,Mathlib/NumberTheory/NumberField/Cyclotomic/Basic.lean,Mathlib/NumberTheory/NumberField/Discriminant/Different.lean,Mathlib/NumberTheory/RamificationInertia/Basic.lean,Mathlib/NumberTheory/RamificationInertia/Galois.lean,Mathlib/NumberTheory/RamificationInertia/HilbertTheory.lean,Mathlib/RingTheory/AlgebraTower.lean,Mathlib/RingTheory/Ideal/Galois.lean,Mathlib/RingTheory/Ideal/Norm/AbsNorm.lean,Mathlib/RingTheory/IntegralClosure/IsIntegralClosure/Basic.lean,Mathlib/RingTheory/Invariant/Basic.lean,Mathlib/RingTheory/Localization/FractionRing.lean 24 1 ['mathlib-dependent-issues'] nobody
15-11354
15 days ago
60-48603
60 days ago
0-83
1 minute
38527 archiebrowne
author:archiebrowne
 feat(Analysis/Calculus): continuously differentiable actions define the class `ContDiffSMul 𝕜 M X n` which asserts that the map `(c, x) ↦ c • x` is `n` times continuously differentiable on `M × X`. Many of the results are the C^n analogues of those in the module Mathlib.Topology.Algebra.MulAction. t-differential-geometry new-contributor 317/24 Mathlib.lean,Mathlib/Analysis/Calculus/BumpFunction/Basic.lean,Mathlib/Analysis/Calculus/ContDiff/Operations.lean,Mathlib/Analysis/Calculus/IteratedDeriv/Lemmas.lean,Mathlib/Analysis/ContDiffMulAction.lean,Mathlib/Analysis/InnerProductSpace/Calculus.lean 6 11 ['archiebrowne', 'github-actions', 'grunweg', 'peabrainiac'] PatrickMassot and grunweg
assignee:grunweg assignee:PatrickMassot
15-5171
15 days ago
15-5246
15 days ago
22-77266
22 days
38903 lua-vr
author:lua-vr
 feat(Covering/Vitali): add `exists_disjoint_subfamily_covering_enlargement_ball` Adds the analogous version `exists_disjoint_subfamily_covering_enlargement_ball` of the Vitali covering theorem for open balls. For the Carleson project. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-measure-probability 37/0 Mathlib/MeasureTheory/Covering/Vitali.lean 1 2 ['github-actions'] EtienneC30
assignee:EtienneC30
15-1306
15 days ago
18-50993
18 days ago
18-50704
18 days
37701 grunweg
author:grunweg
 debug: investigate error in #37688 --- Goal: figure out the bad error messages in #37688. This PR focuses on one such proof: adding grind as default gcongr discharger just locally already produces an error. `grind` cannot solve the first side goal; that is fine --- the error caused is not; that should be improved. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) WIP t-analysis merge-conflict 11/2 Mathlib/Analysis/Fourier/FourierTransformDeriv.lean 1 3 ['github-actions', 'mathlib-merge-conflicts'] nobody
15-1095
15 days ago
46-21934
46 days ago
0-7
7 seconds
38901 thorimur
author:thorimur
 bench: null linters This PR tries to determine the "flat fees" of linters are in benching. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) 12/0 Mathlib/Init.lean 1 7 ['github-actions', 'leanprover-radar', 'thorimur'] nobody
14-81008
14 days ago
unknown
0-0
0 seconds
36756 Jun2M
author:Jun2M
 feat(Combinatorics/GraphLike/Walks): add general walks for `GraphLike` structures Per discussion at ([#graph theory > HasAdj](https://leanprover.zulipchat.com/#narrow/channel/252551-graph-theory/topic/HasAdj/with/575843445)), This PR introduces the basic theory of walks as a general framework that works across different graph-like structures including `SimpleGraph`, `Digraph`, and `Graph`. ## Main definitions * `Walk G u v`: The type of walks from vertex `u` to vertex `v` in a graph-like structure `G` * `Walk.length`: The number of edges in a walk * `Walk.support`: The list of vertices visited by a walk * `Walk.darts`: The list of `darts` (oriented edges) in a walk --- - [ ] depends on: #36743 - [ ] depends on: #39047 - [ ] depends on: #36829 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) blocked-by-other-PR t-combinatorics 789/0 Mathlib.lean,Mathlib/Combinatorics/GraphLike/Basic.lean,Mathlib/Combinatorics/GraphLike/Symm.lean,Mathlib/Combinatorics/GraphLike/Walks/Basic.lean,Mathlib/Combinatorics/GraphLike/Walks/Simple.lean 5 4 ['github-actions', 'mathlib-bors', 'mathlib-dependent-issues', 'mathlib-merge-conflicts'] nobody
14-80746
14 days ago
66-79846
66 days ago
0-547
9 minutes
38021 IvanRenison
author:IvanRenison
 feat(Data/Int/ModEq): add theorem `modEq_two_abs` --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-data 4/0 Mathlib/Data/Int/ModEq.lean 1 1 ['github-actions'] TwoFX
assignee:TwoFX
14-74834
14 days ago
38-85141
38 days ago
38-84852
38 days
38198 JovanGerb
author:JovanGerb
 chore(Data/Real/Basic): `no_expose` the private operations This PR puts `no_expose` on all of the operations on `Real` that are defined in terms of quotients. This is a step in the direction of not exposing the definiton of `Real`. Note that I leave the `irreducible_def`s as is. This is because the `simpNF` linter does not participate in the module system, and it would time out otherwise. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-data 11/32 Mathlib/Analysis/SpecialFunctions/Gaussian/GaussianIntegral.lean,Mathlib/Data/Real/Basic.lean,Mathlib/Topology/Algebra/Valued/NormedValued.lean 3 11 ['JovanGerb', 'eric-wieser', 'github-actions', 'leanprover-radar'] TwoFX
assignee:TwoFX
14-74831
14 days ago
34-46376
34 days ago
34-47028
34 days
38600 khwilson
author:khwilson
 feat(Topology/Semicontinuity): additional definitions for correspondences On the way to proving Michael's selection theorem, several extra notions related to hemicontinuity are introduced. Specifically, the notion of a correspondence having lower sections and it having an open graph. The first construction is what is used in the proof of Michael's theorem to generate approximations to the target selection. The second is used in the iterative step to generate new lower hemicontinuous maps. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-topology awaiting-author 349/0 Mathlib/Topology/Semicontinuity/Defs.lean 1 4 ['github-actions', 'j-loreaux', 'khwilson'] j-loreaux
assignee:j-loreaux
14-67044
14 days ago
18-8166
18 days ago
6-61285
6 days
38594 ScottCarnahan
author:ScottCarnahan
 feat(Algebra/Lie): grading on loop algebras (WIP) put the canonical "energy" grading on a loop algebra. This will (eventually) give us the "energy" operator on smooth representations of a central extension. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) WIP t-algebra
label:t-algebra$
 176/0 Mathlib/Algebra/Lie/Loop.lean,Mathlib/LinearAlgebra/TensorProduct/Decomposition.lean 2 1 ['github-actions'] nobody
14-66675
14 days ago
24-75266
24 days ago
0-21
21 seconds
39037 JovanGerb
author:JovanGerb
 chore: improve some instances These instances were found to cause slow type class searches. This is needed to avoid timeouts in the instance diamonds linter. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) awaiting-CI 11/5 Mathlib/Algebra/Field/Basic.lean,Mathlib/Algebra/Ring/InjSurj.lean,Mathlib/CategoryTheory/Action/Concrete.lean,Mathlib/CategoryTheory/Limits/Shapes/ConcreteCategory.lean,Mathlib/FieldTheory/IntermediateField/Basic.lean 5 3 ['JovanGerb', 'github-actions', 'grunweg'] nobody
14-51315
14 days ago
15-26396
15 days ago
0-432
7 minutes
38228 kim-em
author:kim-em
 ci: block merging PRs that increase technical debt unless reviewed This PR adds a merge gate for technical debt increases. When the existing technical debt metrics script reports an increase, the `build` job adds an `increases-technical-debt` label. A `check-technical-debt` job then adds `blocked-by-increases-technical-debt`, which blocks bors. A reviewer can add `allow-increases-technical-debt` to unblock after confirming the increase is acceptable. ### Fail-closed detection The detection greps for the *safe* patterns (`Decrease in tech debt:` / `No changes to technical debt.`) rather than for `Increase`. If `mathlib-ci` changes the script's output wording, the label is added (fail closed) rather than silently skipped (fail open). ### Labels (three-label pattern, same as #38225) | Label | Managed by | Purpose | |---|---|---| | `increases-technical-debt` | `build` job (tech debt script) | Factual: this PR increases debt | | `blocked-by-increases-technical-debt` | `check-technical-debt` job | Operational: blocks bors | | `allow-increases-technical-debt` | Reviewer | Override: reviewer approves the increase | Bors's `block_labels` has no conditional logic, so we need the derived `blocked-by-increases-technical-debt` label to express the conjunction "increases-technical-debt AND NOT allow-increases-technical-debt". False positives can be reported on the [mathlib4 Zulip](https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/increases-technical-debt.20label). 🤖 Prepared with Claude Code ----------- - [x] depends on: leanprover-community/mathlib-ci#28 CI awaiting-author 76/2 .github/workflows/PR_summary.yml,bors.toml 2 8 ['github-actions', 'grunweg', 'jcommelin', 'joneugster', 'kim-em', 'mathlib-dependent-issues'] Vierkantor and jcommelin
assignee:Vierkantor assignee:jcommelin
14-48806
14 days ago
14-48806
14 days ago
12-75706
12 days
39048 AydenLamp
author:AydenLamp
 feat(Algebra/Group/Defs): add positive natural exponentiation for semigroups Introduce exponentiation for semigroups with positive natural exponents. This serves as a foundation for future results on Green’s relations and Rees matrix constructions in semigroups. --- Co-authored-by: Howard Straubing Soleil Repple Nathan Hart-Hodgson [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor t-algebra awaiting-author
label:t-algebra$
 106/0 Mathlib.lean,Mathlib/Algebra/Group/SemigroupPow.lean 2 7 ['ScottCarnahan', 'github-actions', 'wwylele'] nobody
14-46301
14 days ago
15-3872
15 days ago
0-115
1 minute
37415 vasnesterov
author:vasnesterov
 feat(Tactic/ComputeAsymptotics/Multiseries): compute limits of `Monomial`s Prove * `UnitMonomial.logToFun_isEquivalent_of_nonzero_head`: `log m.toFun` is asymptotically equivalent to its first summand - `m[0] • log basis[0]` if `m[0] ≠ 0`. Using this theorem we can prove that the asymptotic behavior of a monomial is determined by its first non-zero exponent. * `toFun_tendsto_top_of_FirstNonzeroIsPos` and its variants: used to infer the limit of `t.toFun` from `FirstNonzeroIsPos`/`FirstNonzeroIsNeg`/`AllZero`. * `IsLittleO_of_lt_exps` and its variants: used to asymptotically compare two monomials. --- - [x] depends on: #37411 This is a part of the `compute_asymptotics` tactic (#28291). [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-meta awaiting-author 380/1 Mathlib/Tactic/ComputeAsymptotics/Multiseries/Basis.lean,Mathlib/Tactic/ComputeAsymptotics/Multiseries/Monomial/Basic.lean 2 14 ['github-actions', 'joneugster', 'mathlib-dependent-issues', 'mathlib-merge-conflicts'] joneugster
assignee:joneugster
14-44549
14 days ago
14-44549
14 days ago
13-72357
13 days
39046 adamtopaz
author:adamtopaz
 feat: Fill three proof_wanted declarations --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) WIP t-algebra awaiting-author
label:t-algebra$
 54/13 Mathlib/Data/EReal/Operations.lean,Mathlib/LinearAlgebra/Determinant.lean,Mathlib/LinearAlgebra/Trace.lean 3 4 ['github-actions', 'themathqueen'] nobody
14-42332
14 days ago
15-10863
15 days ago
0-1
1 second
39041 themathqueen
author:themathqueen
 refactor(Analysis/InnerProductSpace/Projection): redefine `orthogonalProjectionOnto` via `projectionOntoL` Now that we have `IsTopCompl` and `projectionOntoL`, we can define `orthogonalProjectionOnto` directly this way instead of needing an implementation definition. --- - [ ] depends on: #38970 Zulip thread: [#mathlib4 > refactoring `Submodule.orthogonalProjection`](https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/refactoring.20.60Submodule.2EorthogonalProjection.60/with/593516136) [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) blocked-by-other-PR t-analysis 339/288 Mathlib/Analysis/InnerProductSpace/Adjoint.lean,Mathlib/Analysis/InnerProductSpace/GramSchmidtOrtho.lean,Mathlib/Analysis/InnerProductSpace/MeanErgodic.lean,Mathlib/Analysis/InnerProductSpace/PiL2.lean,Mathlib/Analysis/InnerProductSpace/Positive.lean,Mathlib/Analysis/InnerProductSpace/ProdL2.lean,Mathlib/Analysis/InnerProductSpace/Projection/Basic.lean,Mathlib/Analysis/InnerProductSpace/Projection/FiniteDimensional.lean,Mathlib/Analysis/InnerProductSpace/Projection/Reflection.lean,Mathlib/Analysis/InnerProductSpace/Projection/Submodule.lean,Mathlib/Analysis/InnerProductSpace/Spectrum.lean,Mathlib/Analysis/InnerProductSpace/l2Space.lean,Mathlib/Geometry/Euclidean/Inversion/Calculus.lean,Mathlib/Geometry/Euclidean/Projection.lean,Mathlib/Geometry/Euclidean/Volume/Measure.lean,Mathlib/Geometry/Manifold/Instances/Sphere.lean,Mathlib/LinearAlgebra/Projection.lean,Mathlib/MeasureTheory/Function/ConditionalExpectation/CondexpL2.lean,Mathlib/MeasureTheory/Measure/Hausdorff.lean,Mathlib/Topology/MetricSpace/HausdorffDimension.lean,docs/overview.yaml,docs/undergrad.yaml 22 2 ['github-actions', 'mathlib-dependent-issues'] nobody
14-41654
14 days ago
15-18633
15 days ago
0-1
1 second
38476 agusakov
author:agusakov
 refactor(Combinatorics/Digraph): add vertex sets --- Adopting #33466 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-combinatorics new-contributor awaiting-author 381/50 Mathlib/Combinatorics/Digraph/Basic.lean,Mathlib/Combinatorics/Digraph/Orientation.lean 2 16 ['Shreyas4991', 'YaelDillies', 'agusakov', 'github-actions'] nobody
14-35645
14 days ago
23-54186
23 days ago
3-33232
3 days
39078 fpvandoorn
author:fpvandoorn
 feat: add lemmas about products over Finset.Iio * Mostly useful for `ℕ` * I added the `Finset.Iic` lemmas by symmetry, but I'm happy to remove them if we think they are redundant. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra
label:t-algebra$
 29/0 Mathlib/Algebra/Order/BigOperators/Group/LocallyFinite.lean 1 1 ['github-actions'] nobody
14-33555
14 days ago
14-33635
14 days ago
14-33346
14 days
38671 dagurtomas
author:dagurtomas
 chore(CategoryTheory): start using `mk_concrete_category` --- - [ ] depends on: #38587 - [x] depends on: #39005 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) LLM-generated blocked-by-other-PR 1125/1796 Mathlib.lean,Mathlib/Algebra/Category/AlgCat/Basic.lean,Mathlib/Algebra/Category/BoolRing.lean,Mathlib/Algebra/Category/CommAlgCat/Basic.lean,Mathlib/Algebra/Category/CommBialgCat.lean,Mathlib/Algebra/Category/Grp/Basic.lean,Mathlib/Algebra/Category/ModuleCat/Basic.lean,Mathlib/Algebra/Category/ModuleCat/Semi.lean,Mathlib/Algebra/Category/ModuleCat/Topology/Basic.lean,Mathlib/Algebra/Category/MonCat/Basic.lean,Mathlib/Algebra/Category/Ring/Basic.lean,Mathlib/Algebra/Category/Semigrp/Basic.lean,Mathlib/AlgebraicGeometry/AffineSpace.lean,Mathlib/AlgebraicGeometry/IdealSheaf/Subscheme.lean,Mathlib/AlgebraicGeometry/Morphisms/Smooth.lean,Mathlib/Analysis/Normed/Group/SemiNormedGrp.lean,Mathlib/Order/Category/BddDistLat.lean,Mathlib/Order/Category/BddLat.lean,Mathlib/Order/Category/BddOrd.lean,Mathlib/Order/Category/BoolAlg.lean,Mathlib/Order/Category/DistLat.lean,Mathlib/Order/Category/FinBddDistLat.lean,Mathlib/Order/Category/Frm.lean,Mathlib/Order/Category/HeytAlg.lean,Mathlib/Order/Category/Lat.lean,Mathlib/Order/Category/LinOrd.lean,Mathlib/Order/Category/PartOrd.lean,Mathlib/Order/Category/PartOrdEmb.lean,Mathlib/Order/Category/Preord.lean,Mathlib/RepresentationTheory/Homological/GroupHomology/Functoriality.lean,Mathlib/RepresentationTheory/Rep/Basic.lean,Mathlib/Tactic.lean,Mathlib/Tactic/CategoryTheory/MkConcreteCategory.lean,Mathlib/Topology/Algebra/Category/ProfiniteGrp/Basic.lean,Mathlib/Topology/Category/TopCat/Basic.lean,Mathlib/Topology/Category/UniformSpace.lean,MathlibTest/CategoryTheory/MkConcreteCategory.lean 37 9 ['dagurtomas', 'github-actions', 'leanprover-radar', 'mathlib-dependent-issues', 'mathlib-merge-conflicts'] nobody
14-24649
14 days ago
23-85651
23 days ago
0-1
1 second
39091 tb65536
author:tb65536
 feat(FieldTheory/Galois/IsGaloisGroup): add version of `IsGaloisGroup.to_isFractionRing` assuming only `IsIntegral` This PR adds a version of `IsGaloisGroup.to_isFractionRing` assuming only `Algebra.IsIntegral A B` (which is weaker than the existing assumption `Finite G`). --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-ring-theory t-algebra
label:t-algebra$
 22/9 Mathlib/FieldTheory/Galois/IsGaloisGroup.lean,Mathlib/RingTheory/Invariant/Basic.lean 2 1 ['github-actions'] nobody
14-20163
14 days ago
14-20163
14 days ago
14-19875
14 days
39094 tb65536
author:tb65536
 feat(FieldTheory/Galois/IsGaloisGroup): generalize finiteness of Galois groups from fields to rings This PR generalizes finiteness of Galois groups from fields to rings. --- - [ ] depends on: #39091 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-ring-theory t-algebra blocked-by-other-PR
label:t-algebra$
 31/11 Mathlib/FieldTheory/Galois/IsGaloisGroup.lean,Mathlib/RingTheory/Invariant/Basic.lean 2 2 ['github-actions', 'mathlib-dependent-issues'] nobody
14-17571
14 days ago
14-18441
14 days ago
0-2
2 seconds
38499 SnirBroshi
author:SnirBroshi
 feat(Order/Hom/Basic): `Relation.Map`/`Function.onFun` form an order isomorphism between `α`-relations and `β`-relations For an injective function `f : α → β`, `Relation.Map · f f` is an order embedding from `α`-relations into `β`-relations. For a surjective function `f : α → β`, `Function.onFun · f` is an order embedding from `β`-relations into `α`-relations. For a bijective function `f : α → β`, `Relation.Map · f f` and `Function.onFun · f` form an order isomorphism between `α`-relations and `β`-relations. --- - [ ] depends on: #38432 TODO: generalize to `bicompl` after the dependency is merged [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-order blocked-by-other-PR 42/0 Mathlib/Order/Hom/Basic.lean 1 7 ['SnirBroshi', 'github-actions', 'mathlib-dependent-issues', 'plp127', 'wwylele'] nobody
14-11624
14 days ago
23-52163
23 days ago
4-11004
4 days
39074 tb65536
author:tb65536
 feat(RingTheory/RamificationInertia/Ramification): relate `ramificationIdx'` to `Algebra.IsUnramifiedAt` This PR relates the new `ramificationIdx'` (which will eventually replace `ramificationIdx`) to `Algebra.IsUnramifiedAt`. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-ring-theory t-algebra large-import
label:t-algebra$
 30/0 Mathlib/RingTheory/RamificationInertia/Ramification.lean 1 1 ['github-actions'] nobody
14-10519
14 days ago
14-26175
14 days ago
14-25887
14 days
38223 Deicyde
author:Deicyde
 feat(Geometry/Manifold): add `MfldCat`, the category of `C^n` manifolds We define `MfldCat 𝕜 n`: the category of `C^n` manifolds over a field `𝕜`, following the pattern of `TopCat` in `Mathlib.Topology.Category.TopCat.Basic`. We also implement `HasForget₂ (MfldCat 𝕜 n) TopCat`—the forgetful functor into the category of topological spaces. For more discussion see the Zulip thread: [#PR reviews > #38223 The Category of C^n Manifolds](https://leanprover.zulipchat.com/#narrow/channel/144837-PR-reviews/topic/.2338223.20The.20Category.20of.20C.5En.20Manifolds/with/587038032) Also added: `ContMDiffMap.id_apply`, `.coe_id` and `.coe_comp` which are comparable to `ContinuousMap` API. ### Future work - ✅ Define a Monoidal structure via product manifolds, analogous to `Manifold.Topology.Category.TopCat.Monoidal` #38560 - ✅ Define the tangent functor: `M ↦ TM`, `F ↦ F.tangentMap` from `MfldCat (n+1) 𝕜` to `MfldCat n 𝕜` #38270 - Functor `FGModuleCat 𝕜 ⥤ MfldCat 𝕜 n` sending a finite-dimensional `𝕜`-vector space to the manifold modeled on itself. Left as `TODO`. - Define `FGModuleCat 𝕜` as an enriched category over `MfldCat n 𝕜`. Then _smooth functors_ can be realized as endofunctors on the enriched category. This is the main motivation for this construction. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-differential-geometry new-contributor t-category-theory 224/0 Mathlib.lean,Mathlib/Geometry/Manifold/Category/MfldCat/Basic.lean,Mathlib/Geometry/Manifold/ContMDiffMap.lean 3 57 ['Deicyde', 'chrisflav', 'dagurtomas', 'github-actions', 'idontgetoutmuch', 'peabrainiac'] kim-em
assignee:kim-em
14-4141
14 days ago
14-7565
14 days ago
27-57392
27 days
38864 xroblot
author:xroblot
 feat(IsGaloisGroup): add `restrictHom` --- - [ ] depends on: #38902 - [ ] depends on: #38464 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) WIP blocked-by-other-PR merge-conflict 590/104 Mathlib/Algebra/Algebra/Basic.lean,Mathlib/Algebra/Group/Subgroup/Basic.lean,Mathlib/FieldTheory/Galois/IsGaloisGroup.lean,Mathlib/FieldTheory/IntermediateField/Basic.lean,Mathlib/NumberTheory/RamificationInertia/Galois.lean,Mathlib/RingTheory/Invariant/Basic.lean,Mathlib/RingTheory/Localization/FractionRing.lean 7 3 ['github-actions', 'mathlib-dependent-issues', 'mathlib-merge-conflicts'] nobody
14-2957
14 days ago
19-47400
19 days ago
0-12
12 seconds
39071 scholzhannah
author:scholzhannah
 feat(Topology): add `PartialHomeomorph` as generalization of `OpenPartialHomeomorph` As discussed on Zulip ([#mathlib4 > Generalizing `PartialHomeomorph`?](https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/Generalizing.20.60PartialHomeomorph.60.3F/with/536896273)), I renamed `PartialHomeomorph` to `OpenPartialHomeomorph` in #29113. In this PR I now add a new `PartialHomeomorph` which is a `PartialEquiv` that is continuous on both source and target. An `OpenPartialHomeomorph` is then a `PartialHomeomorph` that additionally has open source and target. `PartialHomeomorph` should find uses at least for and manifolds (`ModelWithCorners`). Afterwards, I want to add a `ClosedPartialHomeomorph` to use for CWComplexes. --- I don't have a lot of experience doing these kind of modifications of a large piece of code. Additionally, I am not familiar with the main uses of `OpenPartialHomeomorph` in Mathlib. So while I did this to the best of my abilities, you should read this carefully because there might be things I did wrong or in non-ideal ways. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) awaiting-author t-topology 1569/139 Mathlib.lean,Mathlib/Geometry/Manifold/ContMDiffMFDeriv.lean,Mathlib/Geometry/Manifold/IsManifold/Basic.lean,Mathlib/Geometry/Manifold/LocalSourceTargetProperty.lean,Mathlib/Logic/Equiv/PartialEquiv.lean,Mathlib/NumberTheory/NumberField/CanonicalEmbedding/NormLeOne.lean,Mathlib/Topology/Constructions.lean,Mathlib/Topology/ContinuousOn.lean,Mathlib/Topology/FiberBundle/Trivialization.lean,Mathlib/Topology/OpenPartialHomeomorph/Basic.lean,Mathlib/Topology/OpenPartialHomeomorph/Composition.lean,Mathlib/Topology/OpenPartialHomeomorph/Constructions.lean,Mathlib/Topology/OpenPartialHomeomorph/Defs.lean,Mathlib/Topology/OpenPartialHomeomorph/IsImage.lean,Mathlib/Topology/PartialHomeomorph/Basic.lean,Mathlib/Topology/PartialHomeomorph/Composition.lean,Mathlib/Topology/PartialHomeomorph/Constructions.lean,Mathlib/Topology/PartialHomeomorph/Defs.lean,Mathlib/Topology/PartialHomeomorph/IsImage.lean 19 2 ['github-actions', 'grunweg'] grunweg
assignee:grunweg
14-960
14 days ago
unknown
0-0
0 seconds
37190 cjrl
author:cjrl
 feat(Combinatorics): Set-Valued Pigeonhole Principle This PR contributes two theorems to combinatorics: - `exists_lt_card_cover_of_card_biUnion_lt_card` is a set-valued version of the pigeonhole principle. - `sum_card_eq_sum_card_cover_biUnion` is a set theoretic corollary of a double counting result proved for bipartite graphs (`Finset.sum_card_bipartiteAbove_eq_sum_card_bipartiteBelow`). This was needed to prove the above pigeonhole principle. The motivation for these results is our Latin Square PR #36698. These results were proved in less general terms in that PR, but are independent of Latin Square considerations and so we have generalized and moved them into more relevant files. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor t-combinatorics 38/0 Mathlib/Combinatorics/Enumerative/DoubleCounting.lean,Mathlib/Combinatorics/Pigeonhole.lean 2 16 ['IvanRenison', 'cjrl', 'ghseeli', 'github-actions', 'j-loreaux', 'vlad902'] b-mehta
assignee:b-mehta
13-74936
13 days ago
40-9032
40 days ago
55-65942
55 days
37761 EtienneC30
author:EtienneC30
 feat: define Bernoulli distribution Define the Bernoulli distribution over an arbitrary measurable space as `Ber(x, y, p) := toNNReal p • dirac x + toNNReal (σ p) • dirac y`. Deprecate `PMF.binomial`. Co-authored-by: @DavidLedvinka --- - [ ] depends on: #37762 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-measure-probability large-import 206/7 Mathlib.lean,Mathlib/Data/ENNReal/Action.lean,Mathlib/MeasureTheory/Measure/Typeclasses/Probability.lean,Mathlib/Probability/Distributions/Bernoulli.lean,Mathlib/Probability/Distributions/SetBernoulli.lean,Mathlib/Probability/Moments/SubGaussian.lean,Mathlib/Probability/ProbabilityMassFunction/Binomial.lean,Mathlib/Probability/ProbabilityMassFunction/Constructions.lean,Mathlib/Probability/ProbabilityMassFunction/Integrals.lean 9 2 ['github-actions', 'mathlib-dependent-issues'] sgouezel
assignee:sgouezel
13-74932
13 days ago
14-26638
14 days ago
14-27211
14 days
38309 ntapiam
author:ntapiam
 feat(Algebra/NonAssoc): dendriform algebras Define dendriform semirings and algebras --- This PR introduces dendriform structures such as dendriform semirings and algebras, and proves basic facts linking them to their pre-Lie counterparts. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra new-contributor
label:t-algebra$
 270/0 Mathlib.lean,Mathlib/Algebra/NonAssoc/Dendriform/Defs.lean,docs/references.bib 3 5 ['dagurtomas', 'github-actions', 'ntapiam'] ocfnash
assignee:ocfnash
13-74926
13 days ago
14-40704
14 days ago
29-45712
29 days
38373 Nicola9Falciola
author:Nicola9Falciola
 feat (Algebra/FreeAbelianGroup /Finsupp) : The support of non zero element in a freeabeliangroup is non empty Add the lemma that for a nonzero a : FreeAbelianGroup X the support of it is non empty. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra new-contributor
label:t-algebra$
 3/0 Mathlib/Algebra/FreeAbelianGroup/Finsupp.lean 1 7 ['Nicola9Falciola', 'SnirBroshi', 'github-actions'] ocfnash
assignee:ocfnash
13-74918
13 days ago
29-30661
29 days ago
30-18813
30 days
38943 felixpernegger
author:felixpernegger
 feat(Topology/CWComplex/Classical): discrete spaces are CW complexes as well as some useful lemmas This is partly based on code by @scholzhannah I think this is notable to include, since it is pretty much the only (easy) "topological" sufficient condition for something being a CW complex there is. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-topology 89/3 Mathlib/Topology/CWComplex/Classical/Basic.lean,Mathlib/Topology/DiscreteSubset.lean 2 28 ['felixpernegger', 'github-actions', 'scholzhannah'] PatrickMassot
assignee:PatrickMassot
13-74915
13 days ago
16-45769
16 days ago
17-59517
17 days
39105 ldct
author:ldct
 feat: Add Real.exp_int_mul Adds the missing `Real.exp_int_mul`, completing the matrix: | | `ℕ` | `ℤ` | |---|---|---| | `ℂ` | `Complex.exp_nat_mul` | `Complex.exp_int_mul` | | `ℝ` | `Real.exp_nat_mul` | `Real.exp_int_mul` (**new**) | --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-analysis 9/0 Mathlib/Analysis/Complex/Exponential.lean,MathlibTest/rexp.lean 2 1 ['github-actions'] nobody
13-64802
13 days ago
13-64701
13 days ago
0-476
7 minutes
38859 SnirBroshi
author:SnirBroshi
 feat(Order/CompleteLattice/Basic): tag `iSup_of_empty'` with `@[simp]` The theorem says `iSup f = sSup ∅` when the domain of `f` is empty, and dually `iInf f = sInf ∅`. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-order 31/47 Mathlib/Analysis/Normed/Lp/lpSpace.lean,Mathlib/Analysis/Seminorm.lean,Mathlib/Data/ENat/Lattice.lean,Mathlib/Data/NNReal/Basic.lean,Mathlib/Data/Nat/Lattice.lean,Mathlib/Data/Real/Archimedean.lean,Mathlib/Data/Set/Finite/Lattice.lean,Mathlib/LinearAlgebra/Eigenspace/Pi.lean,Mathlib/MeasureTheory/Constructions/BorelSpace/Order.lean,Mathlib/Order/CompleteLattice/Basic.lean,Mathlib/Order/ConditionallyCompleteLattice/Indexed.lean,Mathlib/Order/ConditionallyCompletePartialOrder/Indexed.lean,Mathlib/Order/Filter/Basic.lean,Mathlib/Order/Filter/Lift.lean 14 1 ['github-actions'] nobody
13-55308
13 days ago
19-45200
19 days ago
19-48687
19 days
38328 astrainfinita
author:astrainfinita
 feat: `OrderSupSet` This PR introduces `OrderSupSet` and `OrderInfSet`, which are typeclasses expressing that `sSup` (resp., `sInf`) returns the least upper bound (resp., the greatest lower bound) of a set whenever one exists. This allows us to prove properties about the `sSup` of specific sets (such as `∅`, singletons, finite sets, and `univ`) without any typeclasses asserting the existence of LUBs. For example, `sSup ∅ = ⊥` holds for any type equipped with `OrderBot` `OrderSupSet`, no longer requiring typeclasses like `ConditionallyCompleteLinearOrderBot`. For a general set `s`, this gives a uniform way to extend results about `IsLUB s a → motive a` to `motive (sSup s)`, `motive (⨆ i, f i)`, `motive (a ⊔ b)`, etc., which allows proof reuse for basic API such as [`csSup_insert`](https://leanprover-community.github.io/mathlib4_docs/Mathlib/Order/ConditionallyCompleteLattice/Basic.html#csSup_insert), [`iSup_insert`](https://leanprover-community.github.io/mathlib4_docs/Mathlib/Order/CompleteLattice/Basic.html#iSup_insert), and [`sSup_insert`](https://leanprover-community.github.io/mathlib4_docs/Mathlib/Order/CompleteLattice/Basic.html#sSup_insert) and downstream code like [`csSup_add`](https://leanprover-community.github.io/mathlib4_docs/Mathlib/Algebra/Order/Group/Pointwise/CompleteLattice.html#csSup_add), [`sSup_add`](https://leanprover-community.github.io/mathlib4_docs/Mathlib/Algebra/Order/Group/Pointwise/CompleteLattice.html#sSup_add), and [`sup_add`](https://leanprover-community.github.io/mathlib4_docs/Mathlib/Algebra/Order/Group/Lattice.html#sup_add). Furthermore, this allows us to refactor incrementally, reducing the dependency of results about various completeness typeclasses on the specific implementation of `sSup`. --- [Zulip](https://leanprover.zulipchat.com/#narrow/channel/113488-general/topic/Any.20infimum.20based.20version.20of.20.60OmegaCompletePartialOrder.60.3F) [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-order 156/73 Mathlib/MeasureTheory/OuterMeasure/Induced.lean,Mathlib/Order/Bounds/Basic.lean,Mathlib/Order/Bounds/Defs.lean,Mathlib/Order/CompleteLattice/Basic.lean,Mathlib/Order/CompleteLattice/Defs.lean,Mathlib/Order/SetNotation.lean,Mathlib/Topology/UniformSpace/OfCompactT2.lean 7 16 ['JovanGerb', 'astrainfinita', 'b-mehta', 'github-actions', 'j-loreaux', 'mathlib-merge-conflicts', 'openendings', 'vihdzp'] nobody
13-53065
13 days ago
13-53104
13 days ago
18-83523
18 days
37932 idontgetoutmuch
author:idontgetoutmuch
 feat: Exponential map of Lie group is smooth We construct the exponential map `expLie : g → G` for a Lie group `G` and prove that it is smooth. The main reference is: * Eckhard Meinrenken, *Lie Groups and Lie Algebras*, Lecture Notes, University of Toronto. Available at https://www.math.toronto.edu/mein/teaching/LectureNotes/lie.pdf --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor t-differential-geometry awaiting-author 392/0 Mathlib.lean,Mathlib/Geometry/Manifold/Algebra/SmoothLieExp.lean 2 31 ['github-actions', 'grunweg', 'idontgetoutmuch', 'wwylele'] nobody
13-44211
13 days ago
34-48369
34 days ago
0-973
16 minutes
39116 khwilson
author:khwilson
 feat(Topology/Semicontinuity/Michael): michael's selection theorem Michael's selection theorem states that a correspondence `f : α → Set β` from a normal, paracompact topological space `α` to a Frechet space `β` that is lower hemicontinuous, and has nonempty, closed, convex values admits a continuous selection, i.e., a map `g : α → β` such that `g x ∈ f x` for all `x`. This theorem is used in many places, e.g., to find continuous sections to certain functions. This PR proves this theorem. N.B. At this time, this PR doesn't pass as it depends on two other PRs which may go through substantial changes - [ ] depends on: #38601 - [ ] depends on: #39063 AI Disclosure: Various simplifications and refactors provided by Claude Code and then edited by me. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-topology blocked-by-other-PR 159/0 Mathlib/Topology/Semicontinuity/Michael.lean 1 2 ['github-actions', 'mathlib-dependent-issues'] nobody
13-40488
13 days ago
13-40578
13 days ago
0-29
29 seconds
39108 idontgetoutmuch
author:idontgetoutmuch
 feat(Geometry/Manifold/GroupLieAlgebra): Add mfderiv_mul_left_mul and left-translate for integral curves Add the following: `mfderiv_mul_left_mul`: the derivative of left-multiplication satisfies a chain rule: $$d(L_{g \cdot h})_x = d(L_g)_{h \cdot x} \circ d(L_h)_x$$ `mulInvariantVectorField_mul`: the vector field at the translated point is the push forward of the vector field: $$V(g \cdot h) = d(L_g)_h(V(h))$$ `IsMIntegralCurve.left_translate`: using these, if $\gamma$ is an integral curve of $V$, then so is $t \mapsto g \bullet \gamma(t)$ for any $g \in G$, since: $$\frac{d}{dt}(g \bullet \gamma(t)) = d(L_g)_{\gamma(t)}\left(\frac{d\gamma}{dt}(t)\right) = d(L_g)_{\gamma(t)}(V(\gamma(t))) = V(g \bullet \gamma(t))$$ I argue (*) all the time with LLMs so this PR will certainly have had some input from them. Is that enough of a disclosure? (*) Like Lewis Carroll: In my youth said the sage I took to the law and argued each case with wife And the muscular strength that it gave to my jaw has lasted the rest of my life t-differential-geometry new-contributor awaiting-author LLM-generated 73/0 Mathlib/Geometry/Manifold/GroupLieAlgebra.lean 1 8 ['github-actions', 'grunweg'] nobody
13-14701
13 days ago
13-14766
13 days ago
0-37992
10 hours
39123 SnirBroshi
author:SnirBroshi
 chore(Data/Matrix/Basic): mention `mopMatrix` in `transpose{Ring/Alg}Equiv`s docstring and vice versa - `RingEquiv.mopMatrix` and `transposeRingEquiv` differ by a `ᵐᵒᵖ` since the latter assumes `CommMagma α` instead of `Mul α` - `AlgEquiv.mopMatrix` and `transposeAlgEquiv` differ by a `ᵐᵒᵖ` since the latter assumes `CommSemiring α` instead of `Semiring α` --- Also slightly golfs `RingEquiv.mopMatrix` as a drive-by. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-data 18/11 Mathlib/Data/Matrix/Basic.lean 1 1 ['github-actions'] nobody
13-11525
13 days ago
13-11607
13 days ago
13-11318
13 days
39126 joelriou
author:joelriou
 feat(CategoryTheory/Functor/Derived): derived functors are triangulated --- - [ ] depends on: #39117 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) WIP t-category-theory blocked-by-other-PR 423/7 Mathlib.lean,Mathlib/CategoryTheory/Functor/Derived/LeftDerived.lean,Mathlib/CategoryTheory/Functor/Derived/LeftDerivedTriangulated.lean,Mathlib/CategoryTheory/Functor/Derived/RightDerived.lean,Mathlib/CategoryTheory/Functor/Derived/RightDerivedCommShift.lean,Mathlib/CategoryTheory/Functor/Derived/RightDerivedTriangulated.lean,Mathlib/CategoryTheory/Functor/KanExtension/Basic.lean,Mathlib/CategoryTheory/Shift/CommShift.lean,Mathlib/CategoryTheory/Shift/Localization.lean 9 2 ['github-actions', 'mathlib-dependent-issues'] nobody
13-5411
13 days ago
13-7044
13 days ago
0-1
1 second
38587 dagurtomas
author:dagurtomas
 feat(Tactic/CategoryTheory): concrete category boilerplate Adds `mk_concrete_category`, a command for generating the initial boilerplate for concrete categories whose morphisms are given by a bundled function type. The command creates the wrapper `Hom` type, named category and concrete category instances, `ofHom`, `Hom.hom`, and the basic dsimp lemmas. It handles parameterized categories such as `ModuleCat`, and has a paired additive/multiplicative form for generating both structures at once (e.g. `MonCat`/`AddMonCat`). Includes test categories checking the generated declarations. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) LLM-generated t-meta t-category-theory 905/0 Mathlib.lean,Mathlib/Tactic.lean,Mathlib/Tactic/CategoryTheory/MkConcreteCategory.lean,MathlibTest/CategoryTheory/MkConcreteCategory.lean 4 8 ['dagurtomas', 'eric-wieser', 'github-actions'] adamtopaz
assignee:adamtopaz
12-74596
12 days ago
15-65335
15 days ago
15-65807
15 days
38713 justus-springer
author:justus-springer
 feat(Algebra/Category/ModuleCat/Sheaf/ChangeOfRings): API for `restrictScalars` Extend the `restrictScalars` API for presheaves and sheaves of modules to match the existing API in `ModuleCat/ChangeOfRings`. For both `PresheafOfModules` and `SheafOfModules` we add: - `restrictScalarsCongr`: restriction of scalars along equal morphisms are naturally isomorphic - `restrictScalarsId'/restrictScalarsId`: restriction along the identity is naturally isomorphic to the identity functor - `restrictScalarsComp'/restrictScalarsComp`: restriction along a composition is naturally isomorphic to the composition of restriction functors - `restrictScalarsEquivalenceOfIso`: an isomorphism `R ≅ R'` of (pre)sheaves of rings induces an equivalence of categories of (pre)sheaves of modules. We also move up the "simp barrier": `PresheafOfModules.restrictScalars` and `SheafOfModules.restrictScalars` are no longer `@[simps]` as they have their own API now. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebraic-geometry t-algebra
label:t-algebra$
 326/5 Mathlib/Algebra/Category/ModuleCat/Presheaf/ChangeOfRings.lean,Mathlib/Algebra/Category/ModuleCat/Presheaf/Sheafification.lean,Mathlib/Algebra/Category/ModuleCat/Sheaf/ChangeOfRings.lean 3 6 ['dagurtomas', 'github-actions', 'justus-springer'] joelriou
assignee:joelriou
12-74595
12 days ago
20-39340
20 days ago
21-59677
21 days
38720 tb65536
author:tb65536
 feat(GroupTheory/Rank): nontrivial groups have positive rank This PR proves that nontrivial groups have positive rank. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra t-group-theory
label:t-algebra$
 18/0 Mathlib/GroupTheory/Rank.lean 1 2 ['github-actions', 'wwylele'] mattrobball
assignee:mattrobball
12-74594
12 days ago
23-21871
23 days ago
23-21583
23 days
39130 peabrainiac
author:peabrainiac
 feat(Topology/Algebra): topological multiplicative torsors Introduce a class `IsTopologicalTorsor` for topological torsors of multiplicative groups, as a multiplicative counterpart to the existing `IsTopologicalAddTorsor` for topological torsors of additive groups. --- - [ ] depends on: #38896 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-topology t-algebra blocked-by-other-PR
label:t-algebra$
 464/349 Mathlib/Algebra/AddTorsor/Basic.lean,Mathlib/Algebra/AddTorsor/Defs.lean,Mathlib/Algebra/Group/Pointwise/Set/Scalar.lean,Mathlib/Algebra/Notation/Defs.lean,Mathlib/Analysis/Convex/Segment.lean,Mathlib/Tactic/Translate/ToAdditive.lean,Mathlib/Topology/Algebra/Group/AddTorsor.lean,Mathlib/Topology/Algebra/ProperAction/AddTorsor.lean 8 2 ['github-actions', 'mathlib-dependent-issues'] nobody
12-74413
12 days ago
12-74871
12 days ago
0-1162
19 minutes
38595 openendings
author:openendings
 chore(CategoryTheory): remove defeq abuse in Monad/Kleisli.lean Currently most of Kleisli.lean uses defeq abuse to perform deep rewrites equivalent to `Kleisli.of_mk`, `Kleisli.mk_of`, etc. This PR removes all backward.isDefEq.respectTransparency from the file. Additionally: - Add `theorem Kleisli.comp`, encoding `Kleisli.category.map_comp` in the base category. - Add `theorem Cokleisli.comp`, encoding `category.map_comp` in the base category. - Make `C` implicit in `Monad.unit_naturality` and `Monad.mu_naturality`. - Make `C` implicit in `Comonad.counit_naturality` and `Comonad.delta_naturality`. --- - ~~I would greatly appreciate advice ([e.g. via Zulip](https://leanprover.zulipchat.com/#user/1060393)) on tackling the remainder of this file: the defeqs mostly appear in morally `simp`/`calc` proofs that look horrid in `refine` style. I can supply more rfl theorems like `of_mk` and `mk_of` (and hope to do so in subsequent PRs), but don't know how to use them for a deep type rewrite.~~ [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-category-theory new-contributor awaiting-author WIP 95/28 Mathlib/CategoryTheory/Monad/Basic.lean,Mathlib/CategoryTheory/Monad/Kleisli.lean,MathlibTest/CategoryTheory/Monad.lean 3 22 ['dagurtomas', 'github-actions', 'joelriou', 'openendings'] nobody
12-72854
12 days ago
24-67644
24 days ago
0-4425
1 hour
39134 peabrainiac
author:peabrainiac
 chore(Algebra): module deprecations for `Mathlib.Algebra.AddTorsor` --- - [ ] depends on: #38896 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) large-import blocked-by-other-PR 650/538 Mathlib.lean,Mathlib/Algebra/AddTorsor/Basic.lean,Mathlib/Algebra/AddTorsor/Defs.lean,Mathlib/Algebra/Group/Pointwise/Set/Scalar.lean,Mathlib/Algebra/Notation/Defs.lean,Mathlib/Algebra/Torsor/Basic.lean,Mathlib/Algebra/Torsor/Defs.lean,Mathlib/Analysis/Convex/Segment.lean,Mathlib/LinearAlgebra/AffineSpace/AffineMap.lean,Mathlib/LinearAlgebra/AffineSpace/Defs.lean,Mathlib/Tactic/Translate/ToAdditive.lean,Mathlib/Topology/Algebra/Group/AddTorsor.lean,Mathlib/Topology/Algebra/MulAction.lean,scripts/noshake.json 14 2 ['github-actions', 'mathlib-dependent-issues'] nobody
12-61434
12 days ago
12-61435
12 days ago
0-1666
27 minutes
38855 SnirBroshi
author:SnirBroshi
 feat(Order/ConditionallyCompleteLattice/Indexed): `≤` version of `ciSup_or'` for `ConditionallyCompleteLattice` Deprime `ciSup_or'` because there's no `ciSup_or`, and add a `≤` version (and dual) for `ConditionallyCompleteLattice`. Only `≤` because equality does not hold when `p ≠ q` without `sSup ∅ = ⊥`. --- `ciSup_or'` can't have a dual because there's no dual to `ConditionallyCompleteLinearOrderBot`. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-order 8/1 Mathlib/Order/ConditionallyCompleteLattice/Indexed.lean 1 1 ['github-actions'] nobody
12-50106
12 days ago
19-71314
19 days ago
19-71025
19 days
38856 SnirBroshi
author:SnirBroshi
 feat(Order/ConditionallyCompleteLattice/Indexed): `iSup_iSup_eq_{left/right}` for `ConditionallyCompleteLinearOrderBot` and `≤` versions for `ConditionallyCompleteLattice`. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-order 32/9 Mathlib/Order/CompleteLattice/Basic.lean,Mathlib/Order/ConditionallyCompleteLattice/Indexed.lean 2 1 ['github-actions'] nobody
12-49943
12 days ago
19-64233
19 days ago
19-63944
19 days
38597 kim-em
author:kim-em
 chore: backport robustness changes from bump/nightly-2026-04-27 See [#nightly-testing > nightly#213 adaptations for nightly-2026-04-27 @ 💬](https://leanprover.zulipchat.com/#narrow/channel/428973-nightly-testing/topic/nightly.23213.20adaptations.20for.20nightly-2026-04-27/near/591262169). t-category-theory delegated 91/26 Mathlib/AlgebraicTopology/SimplexCategory/Augmented/Monoidal.lean,Mathlib/CategoryTheory/Bicategory/Coherence.lean,Mathlib/CategoryTheory/Limits/Shapes/ConcreteCategory.lean,Mathlib/CategoryTheory/Limits/Shapes/Equalizers.lean,Mathlib/CategoryTheory/Monoidal/Free/Coherence.lean,Mathlib/CategoryTheory/Sites/DenseSubsite/OneHypercoverDense.lean,Mathlib/CategoryTheory/Sites/Hypercover/One.lean 7 10 ['github-actions', 'kim-em', 'mathlib-bors', 'riccardobrasca', 'robin-carlier'] joelriou
assignee:joelriou
12-45120
12 days ago
12-45121
12 days ago
11-49769
11 days
38216 joelriou
author:joelriou
 feat(AlgebraicTopology/SimplicialSet/KanComplex): MulStruct.assoc --- - [ ] depends on: #38665 - [ ] depends on: #38662 - [ ] depends on: #38664 - [x] depends on: #38172 - [x] depends on: #38367 - [x] depends on: #38063 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebraic-topology WIP large-import blocked-by-other-PR 450/3 Mathlib/AlgebraicTopology/SimplicialSet/Boundary.lean,Mathlib/AlgebraicTopology/SimplicialSet/CategoryWithFibrations.lean,Mathlib/AlgebraicTopology/SimplicialSet/KanComplex.lean,Mathlib/AlgebraicTopology/SimplicialSet/KanComplex/MulStruct.lean,Mathlib/AlgebraicTopology/SimplicialSet/Op.lean,Mathlib/AlgebraicTopology/SimplicialSet/StdSimplex.lean 6 3 ['github-actions', 'mathlib-dependent-issues', 'mathlib-merge-conflicts'] nobody
12-31960
12 days ago
34-5959
34 days ago
0-1
1 second
39115 chrisflav
author:chrisflav
 feat(RingTheory): flat is stable under filtered colimits More precisely, we show that `ObjectProperty.ind ModuleCat.flat = ModuleCat.flat`. From Proetale. --- - [ ] depends on: #39114 - [ ] depends on: #39145 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) WIP blocked-by-other-PR 193/0 Mathlib.lean,Mathlib/Algebra/Homology/ShortComplex/Exact.lean,Mathlib/CategoryTheory/Limits/Preserves/Shapes/Zero.lean,Mathlib/RingTheory/Flat/Ind.lean 4 2 ['github-actions', 'mathlib-dependent-issues'] nobody
12-11782
12 days ago
unknown
0-0
0 seconds
39151 anovickis
author:anovickis
 feat(Analysis/CStarAlgebra/Matrix): IsTopologicalGroup for specialUnitaryGroup Adds `ContinuousInv` and `IsTopologicalGroup` instances for `Matrix.specialUnitaryGroup n 𝕜`. The unitary group `Matrix.unitaryGroup n α` already inherits these via the `unitaryGroup ≡ unitary R` abbrev + existing instances on `unitary R` (in `Mathlib/Topology/Algebra/Star/Unitary.lean`). However, `specialUnitaryGroup` is the sub-Submonoid `unitaryGroup ⊓ MonoidHom.mker detMonoidHom` — it does not auto-inherit those instances since it is not literally an alias of `unitary R`. ### New declarations - `instance Matrix.specialUnitaryGroup.instContinuousInv` — proven via `Matrix.star_eq_inv` + `continuous_star` - `instance Matrix.specialUnitaryGroup.instIsTopologicalGroup` — combining `ContinuousMul` (from Submonoid structure) + `ContinuousInv` Both placed inside the existing `EntrywiseSupNorm` section in `Mathlib/Analysis/CStarAlgebra/Matrix.lean` (the natural neighborhood for matrix-specific topological structure on (special) unitary groups). ### Motivation These instances enable using `specialUnitaryGroup` as a topological group in homogeneous-space constructions (e.g., `SU(3) ⧸ T = F₂` flag manifolds). They complement #39146 (CompactSpace instances for the same groups) — together giving the standard 'compact topological group' typeclass set on `specialUnitaryGroup`. ### Verification \`\`\`lean example : ContinuousInv (Matrix.specialUnitaryGroup (Fin 3) ℂ) := inferInstance -- now works example : IsTopologicalGroup (Matrix.specialUnitaryGroup (Fin 3) ℂ) := inferInstance -- now works \`\`\` Both fail on master without this PR; both succeed after. t-analysis new-contributor awaiting-author 30/0 Mathlib/Analysis/CStarAlgebra/Matrix.lean 1 3 ['github-actions', 'j-loreaux', 'wwylele'] nobody
12-3825
12 days ago
12-3825
12 days ago
0-3921
1 hour
38489 Jun2M
author:Jun2M
 feat(Topology/Algebra/InfiniteSum): Generalize ENNReal lemmas This PR generalizes many theorems in Topology/Algebra/InfiniteSum/ENNReal.lean from `ENNREal` to any type that satisfies a list of order-related instances, mostly `[CommMonoid α] [CompleteLattice α] [CanonicallyOrderedMul α] [TopologicalSpace α] [SupConvergenceClass α]` Deprecation of the original `ENNReal` lemmas are done in the next PR: #38193. Related Zulip thread: [#Is there code for X? > Summing `ENat`s without topology](https://leanprover.zulipchat.com/#narrow/channel/217875-Is-there-code-for-X.3F/topic/Summing.20.60ENat.60s.20without.20topology/with/588756615) --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) 261/3 Mathlib/MeasureTheory/Measure/MeasureSpace.lean,Mathlib/MeasureTheory/OuterMeasure/OfFunction.lean,Mathlib/Topology/Algebra/InfiniteSum/Basic.lean,Mathlib/Topology/Algebra/InfiniteSum/Order.lean 4 7 ['Jun2M', 'SnirBroshi', 'github-actions', 'wwylele'] nobody
12-740
12 days ago
12-817
12 days ago
27-76973
27 days
37298 artie2000
author:artie2000
 refactor(Algebra/Order): unbundle group and ring cone * Unbundle `GroupCone` and `RingCone` using `Submonoid.IsMulPointed` The material in `Mathlib.Algebra.Group.Submonoid.Support` was created to treat uniformly * positive cones in groups and rings * pointed cones in vector spaces over an ordered field * orderings in rings This PR deprecates the [GroupCone](https://leanprover-community.github.io/mathlib4_docs/Mathlib/Algebra/Order/Group/Cone.html#GroupCone) and [RingCone](https://leanprover-community.github.io/mathlib4_docs/Mathlib/Algebra/Order/Ring/Cone.html#RingCone) structures, making use of the predicates `Submonoid.IsMulPointed` and `AddSubmonoid.IsPointed` defined in that file instead. See also #36863 for the analogous change to ring orderings. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra large-import
label:t-algebra$
 136/31 Mathlib/Algebra/Order/Group/Cone.lean,Mathlib/Algebra/Order/Ring/Cone.lean 2 2 ['github-actions', 'joneugster'] themathqueen
assignee:themathqueen
11-74534
11 days ago
54-15978
54 days ago
54-16244
54 days
37712 eric-wieser
author:eric-wieser
 feat: add a `LawfulXor` typeclass I've put this in mathlib since it can use `Function.Involutive`; it can of course be upstreamed at a later date. Having this generalization encourages downstream code in cslib to be expressed in terms of involutive functions, rather than just `^^^` on bitvectors. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-data 130/0 Mathlib.lean,Mathlib/Data/LawfulXor.lean 2 6 ['eric-wieser', 'github-actions', 'linesthatinterlace'] joneugster
assignee:joneugster
11-74531
11 days ago
16-75418
16 days ago
23-67721
23 days
37956 artie2000
author:artie2000
 feat(Algebra/Polynomial): lemmas about polynomial degree * Add various small lemmas about polynomial degree --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra
label:t-algebra$
 28/5 Mathlib/Algebra/Polynomial/Degree/Defs.lean,Mathlib/Algebra/Polynomial/Degree/Operations.lean,Mathlib/Algebra/Polynomial/FieldDivision.lean,Mathlib/Algebra/Polynomial/Monic.lean,MathlibTest/hintAll.lean 5 7 ['artie2000', 'github-actions', 'vihdzp'] kim-em
assignee:kim-em
11-74529
11 days ago
40-16346
40 days ago
40-17858
40 days
38488 b-mehta
author:b-mehta
 feat(Data/Finset/Card): iterating a function's image on a finite set stabilises ...and does so in a bounded number of steps (which is why this is Finset-specific). In a later PR, I'll add this for endofunctions on a fintype, as well as add a Set.Finite version. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-data 40/0 Mathlib/Data/Finset/Card.lean,Mathlib/Data/Finset/Image.lean 2 16 ['SnirBroshi', 'b-mehta', 'github-actions'] joneugster
assignee:joneugster
11-74521
11 days ago
27-79756
27 days ago
27-79467
27 days
38649 chrisflav
author:chrisflav
 chore(RingTheory): equality of linear map with values in finite module spreads out We add some corollaries of `Module.Finite.exists_smul_of_comp_eq_of_isLocalizedModule`. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-ring-theory large-import 75/1 Mathlib/Algebra/Module/FinitePresentation.lean,Mathlib/RingTheory/Localization/BaseChange.lean,Mathlib/RingTheory/Localization/Module.lean 3 2 ['github-actions'] alreadydone
assignee:alreadydone
11-74515
11 days ago
24-27264
24 days ago
24-26975
24 days
39107 SnirBroshi
author:SnirBroshi
 feat(Geometry/Manifold/ChartedSpace): `H ≃ₜ M` → `ChartedSpace H M` --- I thought it was strange that `Homeomorph`s didn't have this easy dot-notation, though I'm not familiar with this part of the library so I might be missing something. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-differential-geometry 6/0 Mathlib/Geometry/Manifold/ChartedSpace.lean 1 1 ['github-actions'] PatrickMassot
assignee:PatrickMassot
11-74504
11 days ago
13-53032
13 days ago
13-52743
13 days
39163 j-loreaux
author:j-loreaux
 feat: `star` structures on `ContinuousLinearMapWOT` In particular, with these instances it makes sense to consider the `StarSubalgebra.topologicalClosure` of some `S : StarSubalgebra 𝕜 (F →WOT[𝕜] F)`. --- - [ ] depends on: #37914 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) blocked-by-other-PR 157/4 Mathlib.lean,Mathlib/Algebra/Star/Basic.lean,Mathlib/Algebra/Star/Pointwise.lean,Mathlib/Algebra/Star/TransferInstance.lean,Mathlib/Analysis/InnerProductSpace/WeakOperatorTopology.lean 5 2 ['github-actions', 'mathlib-dependent-issues'] nobody
11-65908
11 days ago
11-65908
11 days ago
0-405
6 minutes
38785 scholzhannah
author:scholzhannah
 feat: use `alias_in` attribute for CW complexes Using the `alias_in` attribute for classical CW complexes to get rid of the `export` sections. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-topology 103/58 Mathlib/Topology/CWComplex/Classical/Basic.lean,Mathlib/Topology/CWComplex/Classical/Finite.lean,Mathlib/Topology/CWComplex/Classical/Subcomplex.lean 3 8 ['github-actions', 'grunweg', 'scholzhannah'] grunweg, mcdoll, urkud
assignee:urkud assignee:grunweg assignee:mcdoll
11-49736
11 days ago
14-50055
14 days ago
21-38128
21 days
39154 joelriou
author:joelriou
 feat(CategoryTheory): the left derived functor commutes with the shift This dualized the result in #39117. --- - [ ] depends on: #39117 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) WIP t-category-theory blocked-by-other-PR 448/7 Mathlib.lean,Mathlib/CategoryTheory/Functor/Derived/LeftDerived.lean,Mathlib/CategoryTheory/Functor/Derived/LeftDerivedCommShift.lean,Mathlib/CategoryTheory/Functor/Derived/RightDerived.lean,Mathlib/CategoryTheory/Functor/Derived/RightDerivedCommShift.lean,Mathlib/CategoryTheory/Functor/KanExtension/Basic.lean,Mathlib/CategoryTheory/Shift/CommShift.lean,Mathlib/CategoryTheory/Shift/Localization.lean 8 2 ['github-actions', 'mathlib-dependent-issues'] nobody
11-46727
11 days ago
12-5623
12 days ago
0-1
1 second
39186 kbuzzard
author:kbuzzard
 perf(RingTheory/LaurentSeries): add some instances Typeclass inference was expensively failing at some point in `LaurentSeries.valuation_compare` without these instances. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) Discovered by getting Claude Code to edit Lean's typeclass inference algorithm and then compile lean and mathlib and see what breaks. Found out that typeclass inference is going down a big hole in this file; this fixes the hole. t-ring-theory 9/0 Mathlib/RingTheory/LaurentSeries.lean 1 3 ['github-actions', 'kbuzzard', 'leanprover-radar'] nobody
11-44973
11 days ago
11-46509
11 days ago
11-46220
11 days
39190 tb65536
author:tb65536
 chore(RingTheory/LocalRing/ResidueField/Fiber): namespace file This PR adds an `Ideal` namespace to `Fiber.lean` and adds a deprecation for one declaration that should be in this namespace. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-ring-theory t-algebra
label:t-algebra$
 9/3 Mathlib/RingTheory/LocalRing/ResidueField/Fiber.lean 1 1 ['github-actions'] nobody
11-43654
11 days ago
11-43654
11 days ago
11-43366
11 days
33664 ooovi
author:ooovi
 feat(Geometry/Convex/Cone/Pointed): face lattice of pointed cones - Define PointedCone.IsFaceOf, for a pointed cone being a face of another pointed cone. - Prove some basic properties, that faces are extreme sets of their cone, and how they behave under intersection, map and product operations. - Define `Face` by bundling the `IsFaceOf` structure, and show the complete lattice structure on it. - Prove that taking the product of two faces is an order isomorphism. Co-authored-by: Martin Winter --- - [x] depends on: #33780 for the definition of the lineal space - [ ] depends on: #39185 for `isFaceOf` [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-convex-geometry blocked-by-other-PR 485/0 Mathlib.lean,Mathlib/Geometry/Convex/Cone/Face/Basic.lean,Mathlib/Geometry/Convex/Cone/Face/Lattice.lean 3 200 ['YaelDillies', 'eric-wieser', 'github-actions', 'martinwintermath', 'mathlib-dependent-issues', 'mathlib4-merge-conflict-bot', 'ooovi', 'vihdzp'] nobody
11-41858
11 days ago
37-25165
37 days ago
5-78229
5 days
39185 ooovi
author:ooovi
 feat(Geometry/Convex/Cone/Pointed): faces of pointed cones - Define PointedCone.IsFaceOf, for a pointed cone being a face of another pointed cone. - Prove some basic properties, that faces are extreme sets of their cone, and how they behave under intersection, map and product operations. Co-authored-by: Martin Winter --- split off of #33664 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-convex-geometry 289/0 Mathlib.lean,Mathlib/Geometry/Convex/Cone/Face/Basic.lean 2 4 ['YaelDillies', 'github-actions', 'martinwintermath', 'mathlib-bors'] YaelDillies
assignee:YaelDillies
11-41517
11 days ago
11-44127
11 days ago
0-2659
44 minutes
37631 linesthatinterlace
author:linesthatinterlace
 feat: add `Function.{prod,diag,fstComp,sndComp,prodMap}` Adds `Mathlib/Logic/Function/Init.lean`, centralising a cluster of general-purpose function operations in the `Function` namespace: - `Function.dcomp` (notation `∘'`) — dependent composition, moved here from `Mathlib/Logic/Function/Defs.lean`. - `Function.prod` (notation `⋏`) — pointwise pair of two (possibly dependent) functions, `(f ▽ g) i = (f i, g i)`. - `Function.fstComp` / `Function.sndComp` — the two components of a function valued in a product; inverse to `Function.prod`. - `Function.diag` (notation `△`) — the diagonal `a ↦ (a, a)`. - `Function.prodMap` — dot-notation alias for `Prod.map`; collapses to `Prod.map` under `simp` so existing API applies unchanged. `Pi.prod` is removed in favour of `Function.prod` (which is itself the dependent version); a deprecated alias is provided. The file depends only on `Mathlib.Init` (and `Batteries.Tactic.Alias` for the deprecated alias) so it can be upstreamed to Batteries / core without pulling mathlib dependencies. - [x] depends on: #38963 t-logic WIP 247/27 Mathlib.lean,Mathlib/Algebra/Algebra/NonUnitalHom.lean,Mathlib/Algebra/Notation/Pi/Defs.lean,Mathlib/Algebra/Star/StarAlgHom.lean,Mathlib/Data/Fin/Tuple/Curry.lean,Mathlib/Logic/Function/Defs.lean,Mathlib/Logic/Function/Init.lean 7 21 ['SnirBroshi', 'eric-wieser', 'fpvandoorn', 'github-actions', 'grunweg', 'linesthatinterlace', 'mathlib-dependent-issues'] fpvandoorn
assignee:fpvandoorn
11-35489
11 days ago
18-12011
18 days ago
24-73399
24 days
39191 m13683320924-hue
author:m13683320924-hue
 feat: define Asymptotics.IsSubpolynomial This PR defines `Asymptotics.IsSubpolynomial l f g`, meaning that `f` is asymptotically bounded by `1 + ‖g‖ ^ k` for some `k : ℕ`. It also adds basic closure lemmas for constants, addition, multiplication, and natural powers. Towards #32658. The formalization was developed with the help of Doubao-Seed-2.0-code and manually checked in Lean. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-analysis new-contributor 259/0 Mathlib.lean,Mathlib/Analysis/Asymptotics/Subpolynomial.lean 2 3 ['github-actions'] nobody
11-29783
11 days ago
11-40744
11 days ago
0-344
5 minutes
35773 joelriou
author:joelriou
 feat(Algebra/Category/ModuleCat): another approach to the module structure on stalks In this draft PR, we define the colimit of a presheaf of modules indexed by an initially small cofiltered category. We apply this to the definition of fiber functors on (pre)sheaves of modules. After showing that these fiber functors are monoidal, we may deduce that the category of sheaves of modules is monoidal when the site has enough points. In particular, if `X` is a scheme, the category `X.Modules` of $$\mathcal O_X$$-Modules is monoidal. After some sorries are removed, we may obtain that the fullsubcategory of `X.Modules` consisting of quasi-coherent sheaves is also monoidal. --- - [x] depends on: #37662 - [x] depends on: #37370 - [x] depends on: #37369 - [x] depends on: #36688 - [x] depends on: #36810 - [x] depends on: #36692 - [x] depends on: #36680 - [x] depends on: #36599 - [x] depends on: #36457 - [x] depends on: #36470 - [x] depends on: #35572 - [x] depends on: #35806 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) WIP t-algebra t-category-theory large-import
label:t-algebra$
 1126/4 Mathlib.lean,Mathlib/Algebra/Category/ModuleCat/Monoidal/Adjunction.lean,Mathlib/Algebra/Category/ModuleCat/Presheaf/ColimitFunctorMonoidal.lean,Mathlib/Algebra/Category/ModuleCat/Presheaf/Point.lean,Mathlib/Algebra/Category/ModuleCat/Presheaf/PushforwardLaxMonoidal.lean,Mathlib/Algebra/Category/ModuleCat/Presheaf/RestrictScalarsLaxMonoidal.lean,Mathlib/Algebra/Category/ModuleCat/Sheaf.lean,Mathlib/Algebra/Category/ModuleCat/Sheaf/Colimits.lean,Mathlib/Algebra/Category/ModuleCat/Sheaf/FreeMonoidal.lean,Mathlib/Algebra/Category/ModuleCat/Sheaf/Monoidal.lean,Mathlib/Algebra/Category/ModuleCat/Sheaf/Point.lean,Mathlib/Algebra/Category/ModuleCat/Sheaf/PushforwardContinuous.lean,Mathlib/Algebra/Category/ModuleCat/Sheaf/Quasicoherent.lean,Mathlib/Algebra/Category/ModuleCat/Sheaf/QuasicoherentMonoidal.lean,Mathlib/AlgebraicGeometry/Modules/Monoidal.lean,Mathlib/CategoryTheory/Monoidal/Preadditive.lean,Mathlib/CategoryTheory/Preadditive/AdditiveFunctor.lean,Mathlib/CategoryTheory/Sites/CoversTop/Basic.lean,Mathlib/CategoryTheory/Sites/IsSheafFor.lean 19 9 ['github-actions', 'mathlib-dependent-issues', 'mathlib-merge-conflicts'] nobody
11-28981
11 days ago
86-15425
86 days ago
0-1
1 second
39157 vihdzp
author:vihdzp
 feat: `Nat.cast` commutes with addition --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) 26/9 Mathlib/Data/Nat/Cast/Commute.lean,Mathlib/SetTheory/Ordinal/Arithmetic.lean 2 2 ['github-actions', 'plp127'] nobody
11-28422
11 days ago
12-3487
12 days ago
12-3198
12 days
39189 tb65536
author:tb65536
 feat(RingTheory/RamificationInertia/Basic): ramification-inertia formula for finite flat extensions This PR proves the ramification-inertia formula for finite flat extensions. --- - [ ] depends on: #38825 - [ ] depends on: #39094 - [ ] depends on: #39196 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-ring-theory t-algebra blocked-by-other-PR
label:t-algebra$
 191/11 Mathlib.lean,Mathlib/FieldTheory/Galois/IsGaloisGroup.lean,Mathlib/RingTheory/Invariant/Basic.lean,Mathlib/RingTheory/RamificationInertia/Basic.lean,Mathlib/RingTheory/Spectrum/Prime/FreeLocus.lean 5 2 ['github-actions', 'mathlib-dependent-issues'] nobody
11-26618
11 days ago
11-42596
11 days ago
0-2183
36 minutes
37464 martinwintermath
author:martinwintermath
 feat(Geometry/Convex/Cone): Minor additions to pointed cones Minor additions to pointed cones: * `PointedCone.ofSubmodule_le_ofSubmodule` and `PointedCone.ofSubmodule_lt_ofSubmodule`. These are not made simp lemmas, instead the underlying `Submodule.restrictScalars_le` and `Submodule.restrictScalars_lt` have been changed into simp lemmas. * `PointedCone.hull_le_span` as a short form of `Submodule.span_le_restrictScalars R≥0 R s` Co-authored by: Artie Khovanov --- In preparation of #36605. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-convex-geometry maintainer-merge 22/16 Mathlib/Algebra/Module/Submodule/RestrictScalars.lean,Mathlib/Geometry/Convex/Cone/Pointed.lean 2 24 ['YaelDillies', 'artie2000', 'github-actions', 'justus-springer', 'martinwintermath', 'mathlib-merge-conflicts', 'ooovi', 'vihdzp'] nobody
11-25618
11 days ago
13-52430
13 days ago
50-65166
50 days
34054 YellPika
author:YellPika
 feat(Order/OmegaCompletePartialOrder): OmegaCompletePartialOrder instance for `Sigma` with basic `ωScottContinuous` lemmas This PR adds an `OmegaCompletePartialOrder` instance for `Sigma` along with `ωScottContinuous` lemmas for basic operations (`mk`, `fst`, `snd`). Appropriate lemmas are marked with `@[fun_prop]` so that the `fun_prop` tactic can automatically deduce `ωScottContinuous` proofs for functions involving `Sigma`s. --- - [x] depends on: #33941 - [x] depends on: #37258 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor t-order please-merge-master awaiting-author 231/0 Mathlib/Data/Sigma/Order.lean,Mathlib/Order/OmegaCompletePartialOrder.lean 2 29 ['Vierkantor', 'YellPika', 'github-actions', 'grunweg', 'mathlib-dependent-issues', 'mathlib-merge-conflicts'] grunweg
assignee:grunweg
11-24535
11 days ago
91-5786
91 days ago
16-66871
16 days
33611 urkud
author:urkud
 feat(ImplicitFunction): add a parametric version --- I'm not sure if the supporting linear algebra lemmas are in the form we want to see them in Mathlib. - [x] depends on: #33585 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-analysis awaiting-author 191/0 Mathlib.lean,Mathlib/Analysis/Calculus/FDeriv/Prod.lean,Mathlib/Analysis/Calculus/ImplicitFunction/Parametric.lean,Mathlib/LinearAlgebra/Prod.lean 4 13 ['PatrickMassot', 'github-actions', 'grunweg', 'mathlib-merge-conflicts', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot', 'urkud'] ADedecker
assignee:ADedecker
11-19134
11 days ago
101-11673
101 days ago
36-2785
36 days
39211 urkud
author:urkud
 refactor: turn `Set` into a 1-field structure --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) 1552/1417 Mathlib/Algebra/DirectSum/Module.lean,Mathlib/Algebra/FiniteSupport/Basic.lean,Mathlib/Algebra/FreeAlgebra.lean,Mathlib/Algebra/Group/Action/Equidecomp.lean,Mathlib/Algebra/GroupWithZero/NonZeroDivisors.lean,Mathlib/Algebra/Homology/EulerCharacteristic.lean,Mathlib/Algebra/Module/ZLattice/Basic.lean,Mathlib/Algebra/MonoidAlgebra/Grading.lean,Mathlib/Algebra/Notation/Indicator.lean,Mathlib/Algebra/Order/Archimedean/Class.lean,Mathlib/Algebra/Polynomial/Roots.lean,Mathlib/Analysis/Analytic/Basic.lean,Mathlib/Analysis/BoxIntegral/Partition/Measure.lean,Mathlib/Analysis/Calculus/ContDiff/Basic.lean,Mathlib/Analysis/Calculus/ContDiff/Defs.lean,Mathlib/Analysis/Calculus/ContDiff/FTaylorSeries.lean,Mathlib/Analysis/Calculus/ContDiff/Operations.lean,Mathlib/Analysis/Calculus/Deriv/Basic.lean,Mathlib/Analysis/Calculus/Deriv/MeanValue.lean,Mathlib/Analysis/Calculus/FDeriv/Congr.lean,Mathlib/Analysis/Calculus/FDeriv/Symmetric.lean,Mathlib/Analysis/Calculus/FormalMultilinearSeries.lean,Mathlib/Analysis/Calculus/Gradient/Basic.lean,Mathlib/Analysis/Calculus/LineDeriv/Basic.lean,Mathlib/Analysis/Calculus/UniformLimitsDeriv.lean,Mathlib/Analysis/Calculus/VectorField.lean,Mathlib/Analysis/Complex/CauchyIntegral.lean,Mathlib/Analysis/Complex/CoveringMap.lean,Mathlib/Analysis/Complex/PhragmenLindelof.lean,Mathlib/Analysis/InnerProductSpace/Orthogonal.lean,Mathlib/Analysis/LocallyConvex/Polar.lean,Mathlib/Analysis/LocallyConvex/Separation.lean,Mathlib/Analysis/Meromorphic/Order.lean,Mathlib/Analysis/Normed/Group/Continuity.lean,Mathlib/Analysis/Normed/Group/FunctionSeries.lean,Mathlib/Analysis/Normed/Group/Indicator.lean,Mathlib/Analysis/Normed/Lp/lpSpace.lean,Mathlib/Analysis/Normed/Module/FiniteDimension.lean,Mathlib/Analysis/Oscillation.lean,Mathlib/Analysis/Polynomial/MahlerMeasure.lean,Mathlib/Analysis/SpecialFunctions/Complex/Analytic.lean,Mathlib/Analysis/SpecialFunctions/Complex/Arg.lean,Mathlib/Analysis/SpecialFunctions/Complex/CircleMap.lean,Mathlib/Analysis/SpecialFunctions/Log/Basic.lean,Mathlib/Analysis/SpecialFunctions/NonIntegrable.lean,Mathlib/Analysis/SpecialFunctions/PolarCoord.lean,Mathlib/Analysis/SumIntegralExpDecay.lean,Mathlib/CategoryTheory/Sites/JointlySurjective.lean,Mathlib/Combinatorics/Derangements/Basic.lean,Mathlib/Combinatorics/Hindman.lean,Mathlib/Combinatorics/SimpleGraph/Connectivity/Subgraph.lean,Mathlib/Combinatorics/SimpleGraph/Partition.lean,Mathlib/Combinatorics/SimpleGraph/Subgraph.lean,Mathlib/Combinatorics/SimpleGraph/Walk/Maps.lean,Mathlib/Computability/Reduce.lean,Mathlib/Data/Finset/Defs.lean,Mathlib/Data/Finset/Empty.lean,Mathlib/Data/Finset/Insert.lean,Mathlib/Data/Finset/SMulAntidiagonal.lean,Mathlib/Data/NNReal/Basic.lean,Mathlib/Data/Nat/Count.lean,Mathlib/Data/Nat/Nth.lean,Mathlib/Data/Nat/Order/Lemmas.lean,Mathlib/Data/QPF/Multivariate/Basic.lean,Mathlib/Data/Real/Embedding.lean,Mathlib/Data/Set/Accumulate.lean,Mathlib/Data/Set/Basic.lean,Mathlib/Data/Set/Card.lean,Mathlib/Data/Set/Constructions.lean,Mathlib/Data/Set/Defs.lean,Mathlib/Data/Set/Dissipate.lean,Mathlib/Data/Set/Finite/Lattice.lean,Mathlib/Data/Set/Insert.lean,Mathlib/Data/Set/List.lean,Mathlib/Data/Set/MemPartition.lean,Mathlib/Data/Set/Prod.lean,Mathlib/Data/SetLike/Basic.lean,Mathlib/Dynamics/Ergodic/Action/Basic.lean,Mathlib/Dynamics/Ergodic/Action/OfMinimal.lean,Mathlib/Dynamics/Ergodic/AddCircle.lean,Mathlib/Dynamics/Ergodic/Conservative.lean,Mathlib/Dynamics/Ergodic/Ergodic.lean,Mathlib/Dynamics/Ergodic/MeasurePreserving.lean,Mathlib/Dynamics/Ergodic/RadonNikodym.lean,Mathlib/Dynamics/OmegaLimit.lean,Mathlib/Dynamics/TopologicalEntropy/NetEntropy.lean,Mathlib/Dynamics/TopologicalEntropy/Subset.lean,Mathlib/FieldTheory/Galois/Infinite.lean,Mathlib/FieldTheory/Minpoly/Basic.lean,Mathlib/Geometry/Diffeology/Basic.lean,Mathlib/Geometry/Euclidean/Circumcenter.lean,Mathlib/Geometry/Euclidean/Sphere/Tangent.lean,Mathlib/Geometry/Manifold/Complex.lean,Mathlib/Geometry/Manifold/ContMDiff/Atlas.lean,Mathlib/Geometry/Manifold/ContMDiff/Defs.lean,Mathlib/Geometry/Manifold/Instances/Real.lean,Mathlib/Geometry/Manifold/IsManifold/ExtChartAt.lean,Mathlib/Geometry/Manifold/LocalInvariantProperties.lean,Mathlib/Geometry/Manifold/MFDeriv/Basic.lean,Mathlib/Geometry/Manifold/PartitionOfUnity.lean 337 1 ['github-actions'] nobody
11-18915
11 days ago
unknown
0-0
0 seconds
39213 m13683320924-hue
author:m13683320924-hue
 feat: define maximal cliques and independent sets This PR adds explicit predicates for maximal cliques and maximal independent sets: - `SimpleGraph.IsMaximalClique` - `SimpleGraph.IsMaximalIndepSet` It also adds conversion lemmas to and from the existing `Maximal G.IsClique` and `Maximal G.IsIndepSet` formulations, plus basic complement and maximum-to-maximal lemmas. Towards #34962. The formalization was developed with the help of Doubao-Seed-2.0-code and manually checked in Lean. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-combinatorics new-contributor LLM-generated 60/22 Mathlib/Combinatorics/SimpleGraph/Clique.lean 1 3 ['SnirBroshi', 'github-actions'] nobody
11-9190
11 days ago
11-17019
11 days ago
0-389
6 minutes
37716 slavanaprienko
author:slavanaprienko
 feat(LinearAlgebra/Matrix/Determinant): Desnanot-Jacobi identity This PR adds the Desnanot-Jacobi identity (also known as the Lewis Carroll identity or Dodgson condensation): for any (n+2)×(n+2) matrix M over a commutative ring, $$\det(M) \cdot \det(M_{1,n}^{1,n}) = \det(M_1^1) \cdot \det(M_n^n) - \det(M_1^n) \cdot \det(M_n^1)$$ The proof follows Bressoud's *Proofs and Confirmations* (Cambridge University Press, 1999): multiply M by an auxiliary matrix built from columns of the adjugate, then compare determinants. This yields the identity premultiplied by det(M). To cancel, we pass to a universal polynomial ring (an integral domain with nonzero determinant), then specialize back to arbitrary commutative rings. It seems there's some interest in adding this: https://leanprover.zulipchat.com/#narrow/channel/217875-Is-there-code-for-X.3F/topic/Determinantal.20identity.20and.20the.20Cauchy.20matrix.20determinant/with/582946873 --- t-algebra new-contributor
label:t-algebra$
 217/0 Mathlib.lean,Mathlib/LinearAlgebra/Matrix/Determinant/DesnanotJacobi.lean 2 13 ['SnirBroshi', 'github-actions', 'grunweg', 'kim-em', 'slavanaprienko'] nobody
11-7123
11 days ago
11-6877
11 days ago
12-44818
12 days
32608 PrParadoxy
author:PrParadoxy
 feat(LinearAlgebra/PiTensorProduct): API for PiTensorProducts indexed by sets This PR addresses a TODO item in LinearAlgebra/PiTensorProduct.lean: * API for the various ways ι can be split into subsets; connect this with the binary tensor product -- specifically by describing tensors of type ⨂ (i : S), M i, for S : Set ι. Our primary motivation is to formalise the notion of "restricted tensor products". This will be the content of a follow-up PR. Beyond that, the Set API is natural in contexts where the index type has an independent interpretation. An example is quantum physics, where ι ranges over distinguishable degrees of freedom, and where its is common practice to annotate objects by the set of indices they are defined on. --- Stub file with preliminary definition of the restricted tensor product as a direct limit of tensors indexed by finite subsets of an index type: https://github.com/PrParadoxy/mathlib4/blob/restricted-stub/Mathlib/LinearAlgebra/PiTensorProduct/Restricted.lean --- - [x] depends on: #32598 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor awaiting-zulip t-algebra WIP
label:t-algebra$
 300/2 Mathlib.lean,Mathlib/LinearAlgebra/PiTensorProduct.lean,Mathlib/LinearAlgebra/PiTensorProduct/Set.lean 3 31 ['PrParadoxy', 'dagurtomas', 'eric-wieser', 'github-actions', 'goliath-klein', 'leanprover-radar', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
11-6369
11 days ago
151-17091
151 days ago
10-66980
10 days
37625 slavanaprienko
author:slavanaprienko
 feat(LinearAlgebra/Matrix/Charpoly): general coefficient formula as sum of principal minors This PR adds a general formula for the coefficients of `det(1 + X • M)` as sums of principal minors, generalizing the existing `coeff_det_one_add_X_smul_one` (k=1, trace) and `det_eq_sign_charpoly_coeff` (k=n, determinant). It also derives the corresponding formula for the coefficients of the characteristic polynomial via `charpolyRev`. New results: - `det_piecewise_one_eq_submatrix_det`: relates piecewise-with-identity to principal submatrix determinants - `coeff_det_one_add_X_smul_eq_sum_minors`: the k-th coefficient of `det(1 + X • M)` equals the sum of k×k principal minors - `charpoly_coeff_eq_sum_minors`: coefficients of the characteristic polynomial as signed sums of principal minors --- t-algebra new-contributor ready-to-merge
label:t-algebra$
 105/1 Mathlib/LinearAlgebra/Matrix/Charpoly/Coeff.lean 1 28 ['eric-wieser', 'github-actions', 'kim-em', 'mathlib-bors', 'slavanaprienko', 'wwylele'] nobody
11-4628
11 days ago
11-61203
11 days ago
37-17965
37 days
39219 WenrongZou
author:WenrongZou
 feat(FieldTheory/Finite): add variant theorems for `expand_card` Add `MvPolynomial, MvPowerSeries, PowerSeries` version of `FiniteField.expand_card`, which is only for polynomial. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra large-import
label:t-algebra$
 45/4 Mathlib/FieldTheory/Finite/Basic.lean,Mathlib/LinearAlgebra/Matrix/Charpoly/FiniteField.lean,Mathlib/RingTheory/MvPolynomial/Expand.lean,Mathlib/RingTheory/MvPowerSeries/Expand.lean,Mathlib/RingTheory/PowerSeries/Expand.lean 5 1 ['github-actions'] nobody
11-3809
11 days ago
11-3850
11 days ago
11-3793
11 days
37399 SnirBroshi
author:SnirBroshi
 feat(Combinatorics/SimpleGraph/Paths): `IsPath` and `Nil` lemmas --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-combinatorics 10/3 Mathlib/Combinatorics/SimpleGraph/Acyclic.lean,Mathlib/Combinatorics/SimpleGraph/Paths.lean 2 8 ['Rida-Hamadani', 'SnirBroshi', 'YaelDillies', 'github-actions'] YaelDillies
assignee:YaelDillies
11-2005
11 days ago
52-68054
52 days ago
52-67909
52 days
34891 kim-em
author:kim-em
 wip: ConvexSpace constructor from binary convex combinations t-algebra large-import merge-conflict
label:t-algebra$
 3345/0 Mathlib/LinearAlgebra/ConvexSpace.lean 1 4 ['github-actions', 'mathlib-bors', 'mathlib-merge-conflicts'] nobody
11-1005
11 days ago
31-47524
31 days ago
0-459
7 minutes
36863 artie2000
author:artie2000
 refactor(Algebra/Order/Ring/Ordering): unbundle `RingPreordering` The current design for [RingPreordering](https://leanprover-community.github.io/mathlib4_docs/Mathlib/Algebra/Order/Ring/Ordering/Defs.html#RingPreordering) ran into issues at PR #32077. This PR unbundles [RingPreordering](https://leanprover-community.github.io/mathlib4_docs/Mathlib/Algebra/Order/Ring/Ordering/Defs.html#RingPreordering) into a class predicate on [Subsemiring](https://leanprover-community.github.io/mathlib4_docs/Mathlib/Algebra/Ring/Subsemiring/Defs.html#Subsemiring), generalising the material on supports as far as possible. Zulip thread: https://leanprover.zulipchat.com/#narrow/channel/116395-maths/topic/Ring.20orderings.20-.20structure.20or.20predicate.3F/with/562594050 See #37298 for the analogous change to group and ring cones. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra large-import
label:t-algebra$
 455/87 Mathlib.lean,Mathlib/Algebra/Order/Ring/Ordering/Basic.lean,Mathlib/Algebra/Order/Ring/Ordering/Defs.lean,Mathlib/Algebra/Ring/Subsemiring/Support.lean 4 14 ['artie2000', 'chrisflav', 'github-actions', 'mathlib-merge-conflicts'] eric-wieser
assignee:eric-wieser
11-753
11 days ago
11-753
11 days ago
53-41696
53 days
37053 artie2000
author:artie2000
 refactor(Analysis/Convex/Cone): use `PointedCone` in Riesz extension theorem Change the statement of the Riesz extension theorem to take a `PointedCone` rather than a `ConvexCone`. This PR is part of a series replacing `ConvexCone` with `PointedCone`. https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/Replacing.20.60ConvexCone.60.20with.20.60PointedCone.60/near/581184307 --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-convex-geometry maintainer-merge merge-conflict 15/12 Mathlib/Analysis/Convex/Cone/Extension.lean,Mathlib/Geometry/Convex/Cone/Pointed.lean 2 9 ['YaelDillies', 'artie2000', 'github-actions', 'mathlib-merge-conflicts', 'ocfnash'] nobody
11-631
11 days ago
11-632
11 days ago
46-71615
46 days
39049 thorimur
author:thorimur
 bench: review Benching a modification to the overlapping instances linter before suggesting it... --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict 715/43 Mathlib.lean,Mathlib/Algebra/Category/Ring/FilteredColimits.lean,Mathlib/Algebra/Module/DedekindDomain.lean,Mathlib/Algebra/Module/Equiv/Defs.lean,Mathlib/Algebra/Module/GradedModule.lean,Mathlib/Algebra/Order/Antidiag/Prod.lean,Mathlib/Algebra/Order/Invertible.lean,Mathlib/Algebra/Polynomial/Div.lean,Mathlib/Algebra/Star/StarRingHom.lean,Mathlib/Analysis/CStarAlgebra/Spectrum.lean,Mathlib/Analysis/Convex/StdSimplex.lean,Mathlib/Analysis/Fourier/FiniteAbelian/Orthogonality.lean,Mathlib/Analysis/Normed/Field/Krasner.lean,Mathlib/Analysis/SpecialFunctions/ContinuousFunctionalCalculus/Rpow/ConjSqrt.lean,Mathlib/Analysis/SpecificLimits/Normed.lean,Mathlib/CategoryTheory/Localization/Predicate.lean,Mathlib/CategoryTheory/Monoidal/Closed/Cartesian.lean,Mathlib/CategoryTheory/MorphismProperty/OverAdjunction.lean,Mathlib/Control/Applicative.lean,Mathlib/Control/Functor.lean,Mathlib/FieldTheory/Normal/Defs.lean,Mathlib/GroupTheory/OreLocalization/Basic.lean,Mathlib/Init.lean,Mathlib/Lean/Elab/InfoTree.lean,Mathlib/LinearAlgebra/BilinearForm/Orthogonal.lean,Mathlib/LinearAlgebra/Eigenspace/Matrix.lean,Mathlib/LinearAlgebra/RootSystem/Finite/G2.lean,Mathlib/LinearAlgebra/RootSystem/GeckConstruction/Lemmas.lean,Mathlib/LinearAlgebra/SesquilinearForm/Basic.lean,Mathlib/Logic/Basic.lean,Mathlib/MeasureTheory/Measure/Haar/Unique.lean,Mathlib/NumberTheory/ClassNumber/Finite.lean,Mathlib/NumberTheory/NumberField/InfinitePlace/Embeddings.lean,Mathlib/NumberTheory/RamificationInertia/Galois.lean,Mathlib/RingTheory/ChainOfDivisors.lean,Mathlib/RingTheory/ClassGroup.lean,Mathlib/RingTheory/DedekindDomain/Different.lean,Mathlib/RingTheory/DedekindDomain/Dvr.lean,Mathlib/RingTheory/DedekindDomain/Ideal/Lemmas.lean,Mathlib/RingTheory/DedekindDomain/Instances.lean,Mathlib/RingTheory/DedekindDomain/IntegralClosure.lean,Mathlib/RingTheory/DedekindDomain/LinearDisjoint.lean,Mathlib/RingTheory/DiscreteValuationRing/TFAE.lean,Mathlib/RingTheory/FractionalIdeal/Extended.lean,Mathlib/RingTheory/HahnSeries/Lex.lean,Mathlib/RingTheory/Ideal/Norm/AbsNorm.lean,Mathlib/RingTheory/Ideal/Norm/RelNorm.lean,Mathlib/RingTheory/LocalRing/ResidueField/Instances.lean,Mathlib/RingTheory/NormalClosure.lean,Mathlib/RingTheory/Valuation/RankOne.lean,Mathlib/Tactic.lean,Mathlib/Tactic/Linter/DirectoryDependency.lean,Mathlib/Tactic/Linter/OverlappingInstances.lean,Mathlib/Tactic/Linter/UnusedInstancesInType.lean,Mathlib/Tactic/NormNum/Ineq.lean,Mathlib/Topology/Algebra/MulAction.lean,Mathlib/Topology/Algebra/Nonarchimedean/Completion.lean,Mathlib/Topology/Connected/PathConnected.lean,MathlibTest/OverlappingInstances.lean,MathlibTest/Subsingleton.lean,MathlibTest/Variable.lean,MathlibTest/WhitespaceLinter.lean,MathlibTest/congr.lean,MathlibTest/norm_num.lean 64 6 ['github-actions', 'leanprover-radar', 'mathlib-merge-conflicts', 'thorimur'] nobody
11-599
11 days ago
unknown
0-0
0 seconds
39128 joelriou
author:joelriou
 feat(CategoryTheory): triangulated derived functors using derivability structures --- - [ ] depends on: #39126 - [ ] depends on: #39117 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) WIP t-category-theory blocked-by-other-PR merge-conflict 839/16 Mathlib.lean,Mathlib/CategoryTheory/Functor/Derived/LeftDerived.lean,Mathlib/CategoryTheory/Functor/Derived/LeftDerivedTriangulated.lean,Mathlib/CategoryTheory/Functor/Derived/RightDerived.lean,Mathlib/CategoryTheory/Functor/Derived/RightDerivedCommShift.lean,Mathlib/CategoryTheory/Functor/Derived/RightDerivedTriangulated.lean,Mathlib/CategoryTheory/Functor/KanExtension/Basic.lean,Mathlib/CategoryTheory/GuitartExact/KanExtension.lean,Mathlib/CategoryTheory/Localization/DerivabilityStructure/Derives.lean,Mathlib/CategoryTheory/Localization/DerivabilityStructure/DerivesTriangulated.lean,Mathlib/CategoryTheory/Localization/DerivabilityStructure/PointwiseLeftDerived.lean,Mathlib/CategoryTheory/Shift/CommShift.lean,Mathlib/CategoryTheory/Shift/Localization.lean 13 3 ['github-actions', 'mathlib-dependent-issues', 'mathlib-merge-conflicts'] nobody
11-598
11 days ago
13-1931
13 days ago
0-1
1 second
36605 martinwintermath
author:martinwintermath
 feat(Geometry/Convex/Cone): Add lemmas about interaction of hull, span and negation Prove lemmas about the interaction of hull, span and negation. Main additions: * `PointedCone.toSubmodule` that produces a submodule with the same support given that `-C = C`. Also the corresponding `CanLift` * `PointedCone.hull_neg_pair_eq_span_singleton` proving `hull R {-x, x} = R ∙ x` (simp lemma) * `PointedCone.span_eq_hull_neg_sup_hull` proving `span R s = hull R (-s) ⊔ hull R s` * `PointedCone.mem_span` proving `x ∈ span R C ↔ ∃ p, n ∈ C, x = p - n` Considerations: there are several ways to express that a convex cone is a submodule: * `-C = C` * `-C ≤ C` or `C ≤ -C` * `C = span R C` * `C = C.lineal` The consensus was that the the first option is the most direct way to express this property, which then allows to lift to a submodule. Co-authored by: Olivia Röhrig, Kilian Rueß, Artie Khovanov --- - [ ] depends on: #37464 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) blocked-by-other-PR t-convex-geometry 90/12 Mathlib/Geometry/Convex/Cone/Pointed.lean 1 53 ['artie2000', 'github-actions', 'martinwintermath', 'mathlib-dependent-issues', 'mathlib-merge-conflicts'] nobody
11-552
11 days ago
51-83074
51 days ago
17-402
17 days
37951 martinwintermath
author:martinwintermath
 chore(Geometry/Convex/Cone): rework `PointedCone.dual` to take a cone as input in place of a set Rework `PointedCone.dual` to take as input a cone instead of a set. This is done to untangle the functionality of `PointedCone.dual` from `PointedCone.hull` and to align it with the signature of its submodule analogue `Submodule.orthogonalBilin` (partially, with proposed functionality from #34007). See also the discussion here: [#mathlib4 > Reorganizing bilinearity and orthogonality?](https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/Reorganizing.20bilinearity.20and.20orthogonality.3F/with/583882414). Main changes: * change signature `dual (s : Set M)` to `dual (C : PointedCone R M)`. * deprecate `dual_hull` since now obsolete in this form, instead add `mem_dual_hull` in addition to `mem_dual`. * deprecate all of `dual_empty`, `dual_zero` and `dual_singleton_zero` in favor of only `dual_bot`. * deprecate `dual_univ` in favor of `dual_top`. * add notation `R ∙₊ x` in analogy to submodule version `R ∙ x`, for use in new lemma `dual_hull_singleton`. * deprecate `dual_insert` since now obsolete (use `Submodule.span_insert` instead). * deprecate `dual_union`, `dual_iUnion` and `dual_sUnion` in favor of `dual_sup`, `dual_sSup` and `dual_iSup`. * remove `dual_sup` since now obsolete and name has been reused (see above). * add `dual_sup_ker` and `dual_univ_eq_ker` to align with (proposed) submodule analogue for `Submodule.orthogonalBilin`. * deprecate `dual_image` in favor of `dual_map` * add `hull_eq` (cone version of `span_eq`) since used in `basis_coord_mem_dual`. * adjust doc-strings Numerous changes to other files have been necessary. The dual-variants for proper cones or inner product spaces have not yet been adapted to cone-inputs, though this should happen eventually. The definition of `DualFG` has been changed to "duals of `FG`-cones" instead of "duals of finite sets" (also getting rid of `Finset` as previously requested). --- - [x] depends on: #37950 - [x] depends on: #37542 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) 227/128 Mathlib/Analysis/Convex/Cone/Dual.lean,Mathlib/Analysis/Convex/Cone/InnerDual.lean,Mathlib/Analysis/Convex/Cone/TensorProduct.lean,Mathlib/Geometry/Convex/Cone/Dual.lean,Mathlib/Geometry/Convex/Cone/DualFinite.lean,Mathlib/Geometry/Convex/Cone/Pointed.lean,Mathlib/Geometry/Convex/Cone/TensorProduct.lean 7 4 ['github-actions', 'mathlib-dependent-issues', 'mathlib-merge-conflicts'] nobody
11-290
11 days ago
11-329
11 days ago
24-6168
24 days
37299 XC0R
author:XC0R
 feat(NumberTheory): Chebyshev's lower bound on primorial ## Summary Prove `primorial(n) ≥ 2^(n/2)` for all `n ≥ 2` (Chebyshev's 1852 lower bound). This is the lower bound complement to `primorial_le_four_pow`. Addresses the TODO at `Chebyshev.lean` line 50: "Prove Chebyshev's lower bound." ### New file: `Mathlib/NumberTheory/PrimorialLowerBound.lean` **Main theorems:** - `two_pow_le_primorial`: `2 ^ n ≤ primorial (2 * n)` for `n ≥ 29` - `two_pow_div_two_le_primorial`: `2 ^ (n / 2) ≤ primorial n` for `n ≥ 2` **Key intermediates:** - `centralBinom_le_pow_mul_primorial`: `C(2n,n) ≤ (2n)^{π(√(2n)+1)} * primorial(2n)` - `eight_mul_sq_add_le_two_pow`: `8u² + 16u + 8 ≤ 2^u` for `u ≥ 10` ### Proof technique Central binomial decomposition: from `four_pow_lt_mul_centralBinom` and `factorization_choose_le_log`, bound `C(2n,n)` above by `(2n)^{π(√(2n)+1)} * primorial(2n)`. Rearranging gives `primorial(2n) ≥ 2^n` for `n ≥ 29`. Base cases by `norm_num` + `decide`, large `n` analytically via `√n` factoring. ### AI disclosure Claude (Anthropic) was used as a coding assistant for Lean tactic exploration, file structuring, and CI debugging. All proof strategy, mathematical content, and final code have been reviewed and are understood by the author. t-number-theory new-contributor awaiting-author 226/2 Mathlib/NumberTheory/Chebyshev.lean,Mathlib/NumberTheory/Primorial.lean 2 53 ['MichaelStollBayreuth', 'Parcly-Taxel', 'XC0R', 'github-actions', 'mathlib-merge-conflicts', 'wwylele'] MichaelStollBayreuth
assignee:MichaelStollBayreuth
10-84774
10 days ago
42-10477
42 days ago
13-62238
13 days
31580 grunweg
author:grunweg
 feat: towards `ContMDiff` support in fun_prop Create a `find_model` tactic for solving `ModelWithCorners k E H` goals, and a #find_model command to simplify testing it. (Both implementations are a bit hacky right now.) next step: extend the tactic, test that it works well then try to hook it up to fun_prop --- - [x] depends on: #30463 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) WIP t-differential-geometry merge-conflict t-meta 1254/64 Mathlib/Geometry/Manifold/Instances/UnitsOfNormedAlgebra.lean,Mathlib/Geometry/Manifold/Notation.lean,Mathlib/Geometry/Manifold/TestFunPropM.lean,MathlibTest/DifferentialGeometry/Notation.lean,MathlibTest/DifferentialGeometry/NotationAdvanced.lean,mathlib-immersions 6 3 ['github-actions', 'mathlib-dependent-issues', 'mathlib4-merge-conflict-bot'] nobody
10-83520
10 days ago
190-46215
190 days ago
0-1
1 second
36922 SnirBroshi
author:SnirBroshi
 feat(Data/List/Chain): generalize `WellFounded.asymmetric₃` to chains The existing `WellFounded.asymmetric` shows `r a b → ¬r b a`, and `WellFounded.asymmetric₃` shows `r a b → r b c → ¬r c a`. This adds `WellFounded.asymmetricₙ` which shows `l.IsChain r → ¬r l.getLast l.head`. --- Also adds a couple of `IsChain` lemmas which might be useful. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-data 29/8 Mathlib/Data/List/Chain.lean 1 4 ['SnirBroshi', 'github-actions', 'mathlib-merge-conflicts', 'vihdzp'] eric-wieser
assignee:eric-wieser
10-74915
10 days ago
58-29417
58 days ago
62-65204
62 days
38548 adomasbaliuka
author:adomasbaliuka
 feat(Algebra/Ring/BooleanRing): definitional lemmas for `Bool` ring operations Mathlib defines a ring structure on `Bool` but is missing definitional lemmas for the arithmetic operations. --- Discussed on Zulip ([#Is there code for X? > `Bool.xor` same as `+` @ 💬](https://leanprover.zulipchat.com/#narrow/channel/217875-Is-there-code-for-X.3F/topic/.60Bool.2Exor.60.20same.20as.20.60.2B.60/near/590927417)), in particular, it's not immediately intuitive to everyone what the operations do. Note that the parentheses around `^^` and `&&` are needed due to operator precedence w.r.t. `=`, see also https://github.com/leanprover-community/mathlib4/pull/38539. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra
label:t-algebra$
 12/0 Mathlib/Algebra/Ring/BooleanRing.lean 1 1 ['github-actions'] ocfnash
assignee:ocfnash
10-74911
10 days ago
26-27975
26 days ago
26-27686
26 days
38622 mariainesdff
author:mariainesdff
 feat(RingTheory/PowerSeries/ExponentialModule): add exponential module Let `R` be a commutative ring. The exponential module of `R` is the set of all power series `f : R⟦X⟧` that are of exponential type : `f (X + Y) = f X * f Y` where `X` and `Y` are two indeterminates. It is an abelian group under multiplication, and an `R`-module under rescaling. Co-authored by: @AntoineChambert-Loir --- - [ ] depends on: #38615 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-ring-theory 425/0 Mathlib.lean,Mathlib/Algebra/BigOperators/Finsupp/Fin.lean,Mathlib/Data/Nat/Choose/Sum.lean,Mathlib/RingTheory/PowerSeries/ExponentialModule.lean,Mathlib/RingTheory/PowerSeries/Substitution.lean 5 2 ['github-actions', 'mathlib-dependent-issues'] alreadydone
assignee:alreadydone
10-74910
10 days ago
23-30238
23 days ago
23-31046
23 days
38707 tb65536
author:tb65536
 feat(Algebra/Polynomial/Lifts): add `natDegree` verison of `exists_natDegree_eq_of_mem_lifts` This PR adds a `natDegree` version of `exists_degree_eq_of_mem_lifts`. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-ring-theory t-algebra
label:t-algebra$
 4/0 Mathlib/Algebra/Polynomial/Lifts.lean 1 1 ['github-actions'] alreadydone
assignee:alreadydone
10-74909
10 days ago
23-33313
23 days ago
23-33025
23 days
39011 Vierkantor
author:Vierkantor
 chore(Algebra/Polynomial/Module): workaround for backward.inferInstanceAs This PR, like #38990, works around a `backward.inferInstanceAs` compatibility flag introduced by identifying `PolynomialModule` with `Finsupp` in our definitions. We introduce a new dsimp lemma `funLike_eq` that transfers the `FunLike` instances, and now we can use `PolynomialModule`'s `FunLike` instance, instead of the custom `CoeFun` instance. This is not a great approach, but it seems the least painful for the short term. The alternative would be to strictly enforce the defeq barrier between `PolynomialModule` and `Finsupp`, which would mean a substantial rewrite of this corner of Mathlib. We can't make `PolynomialModule` an `@[implicit_reducible]`, because we need different multiplication on it than `Finsupp` has. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra tech debt
label:t-algebra$
 8/5 Mathlib/Algebra/Polynomial/Module/Basic.lean 1 1 ['github-actions'] jcommelin
assignee:jcommelin
10-74898
10 days ago
16-17449
16 days ago
16-17160
16 days
39162 anovickis
author:anovickis
 feat(Topology/PartitionOfUnity): add pointwise_decomposition_finsum + companions Add three short lemmas to `Mathlib/Topology/PartitionOfUnity.lean` extending the existing `PartitionOfUnity` API: - `pointwise_decomposition_finsum` — for `f : X → ℝ` and `x ∈ s`, `f x = ∑ᶠ i, ρ i x · f x`. This is the pointwise step that lifts to integral linearity in measure-theoretic PoU integration: `∫_s f dμ = ∑ᶠ i, ∫_s (ρ i · f) dμ`. - `one_minus_sum_nonneg` — `0 ≤ 1 - ∑ᶠ i, ρ i x`. Direct rearrangement of the existing `sum_le_one` field; useful as a complement-mass remainder bound in chart-by-chart estimates. - `abs_le_one` — `|ρ i x| ≤ 1`. Combines the existing `nonneg` and `le_one`; convenience for absolute-value bounds. All three are short proofs using existing structure fields (`sum_eq_one`, `sum_le_one`, `nonneg`, `le_one`). These came up while writing chart-by-chart Stokes-on-manifold estimates where one wants to decompose `∫_M f` into chart-supported pieces using a partition of unity. The pointwise identity is the obvious first step; the other two are complementary algebraic bounds that show up in remainder estimates. --- 🤖 Generated with [Claude Code](https://claude.com/claude-code) t-topology new-contributor LLM-generated 27/0 Mathlib/Topology/PartitionOfUnity.lean 1 2 ['github-actions'] urkud
assignee:urkud
10-74891
10 days ago
11-70812
11 days ago
11-70523
11 days
39171 yuanyi-350
author:yuanyi-350
 refactor(Analysis): golf `Mathlib/Analysis/Complex/ValueDistribution/LogCounting/Asymptotic` - shortens `one_isLittleO_logCounting_single` by deriving it from a theta estimate for `log r - log ‖e‖` - shortens `logCounting_isBigO_one_iff_analyticOnNhd` by reusing `divisor_nonneg_iff_analyticOnNhd` directly Extracted from #37968 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) codex t-analysis LLM-generated 10/34 Mathlib/Analysis/Complex/ValueDistribution/LogCounting/Asymptotic.lean 1 2 ['github-actions', 'yuanyi-350'] ADedecker
assignee:ADedecker
10-74889
10 days ago
11-49682
11 days ago
11-49393
11 days
39212 emlis42
author:emlis42
 feat(Algebra/ContinuedFractions): add `partNums!` and `partDens!` This PR adds `partNums!` and `partDens!`, which provide infinite stream representations for the sequences of partial numerators and denominators of a generalized continued fraction. t-algebra new-contributor
label:t-algebra$
 8/0 Mathlib/Algebra/ContinuedFractions/Basic.lean 1 4 ['emlis42', 'github-actions', 'grunweg'] nobody
10-71852
10 days ago
11-18171
11 days ago
11-17882
11 days
36559 faenuccio
author:faenuccio
 feat(Analysis/Convex/Uniform): uniformly convex spaces using filters This PR adds an equivalent formulation for a space being uniformly convex using filters. Co-authored-by: Aristotle (Harmonic) WIP t-analysis 205/2 Mathlib/Analysis/Convex/Uniform.lean 1 1 ['github-actions'] faenuccio
assignee:faenuccio
10-69249
10 days ago
71-6602
71 days ago
0-20
20 seconds
39232 jerwaynejones
author:jerwaynejones
 feat(Analysis/Complex): residue theorem for rectangular contours Adds `Mathlib/Analysis/Complex/RectangleResidue.lean` (644 LoC), filling the gap between Cauchy–Goursat for rectangles (`Complex.integral_boundary_rect_eq_zero_of_differentiable_on_off_countable`) and the Cauchy integral formula for circles. The file proves the residue formula for rectangular boundary integrals together with a rotated principal log branch needed to evaluate the left-edge integral that crosses the standard cut. ## Why Mathlib has Cauchy–Goursat for rectangles and the Cauchy integral formula for circles, but no residue theorem for rectangular contours. This file fills that gap. It was extracted from a downstream Lean 4 formalization project (a conditional proof of Goldbach's conjecture, where contour shifting on rectangles arises naturally in Perron's formula). ## Main results - **`Complex.hasDerivAt_log_neg`** — the rotated logarithm `log_neg z := log (-z) + I * π` has derivative `z⁻¹` on the rotated slit plane `{z | -z ∈ slitPlane}` (cut on the positive real axis). - **`Complex.boundaryIntegral_inv_sub_eq_two_pi_I`** — for `ρ` strictly inside the rectangle `[z, w]`, `∮_{∂[z,w]} (s − ρ)⁻¹ ds = 2πi`. - **`Complex.boundaryIntegral_eq_residue_sum`** — parametric residue theorem for a sum of simple poles plus a holomorphic remainder, packaged as `Complex.RectangleResidueData`. - **`Complex.boundaryIntegral_single_pole`** — the one-pole specialization. ## Structure The development proceeds in five stages: 1. A notation `Complex.boundaryIntegral` for the oriented boundary integral over `[z, w]`, with a Cauchy–Goursat wrapper and additivity/scaling lemmas. 2. A rotated principal logarithm `Complex.log_neg z := log (-z) + I * π` with cut on the *positive* real axis, plus its derivative and corner-comparison identities with the standard `Complex.log`. 3. Explicit FTC-based evaluations of the four edge integrals of `(s − ρ)⁻¹`. 4. A closed-form residue boundary integral `∮_{∂[z,w]} (s − ρ)⁻¹ ds = 2πi` for `ρ` strictly inside the rectangle. 5. A parametric residue theorem for sums of simple poles plus a holomorphic remainder, packaged as `Complex.RectangleResidueData`. ## References - L. Ahlfors, *Complex Analysis* (3rd ed.), §4.5. - E. Stein and R. Shakarchi, *Complex Analysis*, Ch. 2 §3 Thm 3.1. ## Status Draft while CI verifies the build against current `master` — the file was developed against `v4.28.0` and cherry-picked forward 2942 commits, so import surface changes are possible. Once CI is green I will flip to ready-for-review. 🤖 Generated with [Claude Code](https://claude.com/claude-code) t-analysis new-contributor 644/0 Mathlib.lean,Mathlib/Analysis/Complex/RectangleResidue.lean 2 2 ['github-actions'] nobody
10-56244
10 days ago
unknown
0-0
0 seconds
38334 8e7
author:8e7
 feat(Combinatorics/SimpleGraph/TreeDecomp): define tree decompositions Add definition for tree decompositions on simple graphs. Define the tree width of a simple graph and prove basic statements and conversions. ```lean structure TreeDecomp (G : SimpleGraph V) where /-- The type of bags in the tree. -/ W : Type u /-- The set of vertices in each bag. -/ 𝓧 : W → Finset V /-- The graph adjacency relation of bags. -/ T : SimpleGraph W /-- T must be a tree. -/ isTree : IsTree T /-- All vertices in G must appear in some bag. -/ vertexCover : ∀ v : V, ∃ w : W, v ∈ 𝓧 w /-- For any edge (u, v) in G, there is a bag containing both u and v. -/ edgeCover ⦃u v : V⦄ : G.Adj u v → ∃ w : W, u ∈ 𝓧 w ∧ v ∈ 𝓧 w /-- For any vertex v in G, the set of bags that contain v is preconnected. -/ connectedBags : ∀ v : V, (T.induce ({w | v ∈ 𝓧 w})).Preconnected ``` AI Usage: Some proofs are written with the help of Claude Code, and everything has been manually reviewed. --- - [ ] depends on: #38027 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor help-wanted blocked-by-other-PR t-combinatorics LLM-generated WIP 396/0 Mathlib.lean,Mathlib/Combinatorics/SimpleGraph/Star.lean,Mathlib/Combinatorics/SimpleGraph/TreeDecomp.lean 3 5 ['8e7', 'github-actions', 'mathlib-dependent-issues'] nobody
10-53673
10 days ago
31-33995
31 days ago
0-356
5 minutes
28013 astrainfinita
author:astrainfinita
 feat: Lindemann-Weierstrass Theorem This PR continues the work from #6718. -------- - [x] depends on: #18693 - [x] depends on: #29121 - [x] depends on: #36762 - [x] depends on: #37797 - [x] depends on: #37811 t-algebra t-analysis awaiting-author
label:t-algebra$
 1076/64 Mathlib.lean,Mathlib/Algebra/MonoidAlgebra/MapDomain.lean,Mathlib/Algebra/Polynomial/Splits.lean,Mathlib/Data/Finsupp/Quotient.lean,Mathlib/NumberTheory/Transcendental/Lindemann/AlgebraicPart.lean,Mathlib/NumberTheory/Transcendental/Lindemann/AnalyticalPart.lean,Mathlib/NumberTheory/Transcendental/Lindemann/Basic.lean,Mathlib/RingTheory/MvPolynomial/Symmetric/Eval.lean,docs/100.yaml,docs/1000.yaml 10 33 ['astrainfinita', 'github-actions', 'grunweg', 'j-loreaux', 'jcommelin', 'mathlib-dependent-issues', 'mathlib-merge-conflicts', 'mathlib-splicebot', 'mathlib4-merge-conflict-bot'] nobody
10-45276
10 days ago
187-1353
187 days ago
3-86310
3 days
39239 alainchmt
author:alainchmt
 feat(FieldTheory/Finite): irreducible polynomial divides X^q^n - X iff degree divides n --- Add the theorem saying that, for an irreducible polynomial `f` over a finite field `K`, the degree of `f` divides `n` if and only if `f` divides `X ^ (Nat.card K) ^ n - X`. Include auxiliary lemmas. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra new-contributor
label:t-algebra$
 34/0 Mathlib/FieldTheory/Finite/Extension.lean,Mathlib/FieldTheory/Minpoly/Field.lean 2 2 ['github-actions'] nobody
10-44064
10 days ago
10-44153
10 days ago
10-43864
10 days
39248 grunweg
author:grunweg
 dev: lint modules with just one exposed def, to manually inspect --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) WIP t-meta 50/9 Mathlib/CategoryTheory/MarkovCategory/Positive.lean,Mathlib/Tactic/Linter/PrivateModule.lean,MathlibTest/PrivateModuleLinter/hasOnlyPrivateNoDefs.lean 3 2 ['github-actions'] nobody
10-39068
10 days ago
10-39145
10 days ago
0-8
8 seconds
39164 allenhaozhu
author:allenhaozhu
 feat(Probability/Distance): add total variation distance `tvDist` Add `MeasureTheory.tvDist : Measure α → Measure α → ℝ≥0∞`, the total variation distance between two measures, defined via the truncated subtraction `μ - ν` already in `Mathlib.MeasureTheory.Measure.Sub`. Add four basic lemmas (`tvDist_self`, `tvDist_comm`, `tvDist_nonneg`, `tvDist_le_one`) and a bridge lemma `tvDist_eq_signedMeasure_totalVariation` connecting `tvDist` to the existing `MeasureTheory.SignedMeasure.totalVariation` for finite measures. --- ## AI-assistance disclosure Per the Mathlib [AI-use policy](https://leanprover-community.github.io/contribute/index.html#use-of-ai): - **Tool.** Claude Code (Anthropic) with the Claude Sonnet 4.6 model. - **Use.** I specified the target lemma statements and the proof strategy; the assistant drafted Lean 4 tactic combinations against current Mathlib. I iterated on the proofs, verified each lemma builds under `lake build` from a clean checkout, and read the final code. - **Vouching.** I have read every declaration in this file and can defend the proofs without further AI assistance. I welcome reviewer feedback on naming, namespace placement, and stylistic alignment with the surrounding Mathlib modules. t-measure-probability new-contributor LLM-generated awaiting-author 187/0 Mathlib.lean,Mathlib/Probability/Distance/TotalVariation.lean 2 4 ['allenhaozhu', 'github-actions', 'grunweg'] nobody
10-35668
10 days ago
11-45302
11 days ago
0-2707
45 minutes
39165 allenhaozhu
author:allenhaozhu
 feat(Probability/Moments): add IsSubExponential class Add `ProbabilityTheory.IsSubExponential X μ ν b`, the sub-exponential random variable class: `mgf X μ s ≤ exp (s²ν/2)` for `|s| < 1/b`. Mirror the structure of the existing `Mathlib/Probability/Moments/SubGaussian.lean`. Include constructor lemmas (`IsSubExponential.const`, `mono_b`, `mono_nu`) and a tail bound derived through Mathlib's `measure_ge_le_exp_mul_mgf`. --- ## AI-assistance disclosure Per the Mathlib [AI-use policy](https://leanprover-community.github.io/contribute/index.html#use-of-ai): - **Tool.** Claude Code (Anthropic) with the Claude Sonnet 4.6 model. - **Use.** I specified the target lemma statements and the proof strategy; the assistant drafted Lean 4 tactic combinations against current Mathlib. I iterated on the proofs, verified each lemma builds under `lake build` from a clean checkout, and read the final code. - **Vouching.** I have read every declaration in this file and can defend the proofs without further AI assistance. I welcome reviewer feedback on naming, namespace placement, and stylistic alignment with the surrounding Mathlib modules. t-measure-probability new-contributor LLM-generated awaiting-author 257/0 Mathlib.lean,Mathlib/Probability/Moments/SubExponential.lean 2 4 ['allenhaozhu', 'github-actions', 'grunweg'] nobody
10-35667
10 days ago
11-45310
11 days ago
0-2698
44 minutes
39168 allenhaozhu
author:allenhaozhu
 feat(Analysis/Convex/Subgradient): add subgradient characterization for |·| and ℓ¹ Add `Convex.IsAbsSubgradient x g`, the predicate that `g` is a subgradient of `|·|` at `x`. Prove the standard characterization: the only subgradient at `x > 0` is `1`; at `x < 0` it is `-1`; at `x = 0` the subgradients are exactly `[-1, 1]`. Add `IsL1Subgradient`, the componentwise lift to `Fin n → ℝ` used by ℓ¹-regularized estimation (Lasso KKT). --- ## AI-assistance disclosure Per the Mathlib [AI-use policy](https://leanprover-community.github.io/contribute/index.html#use-of-ai): - **Tool.** Claude Code (Anthropic) with the Claude Sonnet 4.6 model. - **Use.** I specified the target lemma statements and the proof strategy; the assistant drafted Lean 4 tactic combinations against current Mathlib. I iterated on the proofs, verified each lemma builds under `lake build` from a clean checkout, and read the final code. - **Vouching.** I have read every declaration in this file and can defend the proofs without further AI assistance. I welcome reviewer feedback on naming, namespace placement, and stylistic alignment with the surrounding Mathlib modules. t-analysis new-contributor LLM-generated awaiting-author 231/0 Mathlib.lean,Mathlib/Analysis/Convex/Subgradient/Abs.lean 2 4 ['allenhaozhu', 'github-actions', 'grunweg'] nobody
10-35665
10 days ago
11-45395
11 days ago
0-2608
43 minutes
39195 linesthatinterlace
author:linesthatinterlace
 feat(Logic/Function/Defs): Add dcomp lemmas This PR adds API lemmas about `dcomp` that were previously missing. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-logic 13/0 Mathlib/Logic/Function/Defs.lean 1 6 ['github-actions', 'linesthatinterlace', 'plp127'] nobody
10-33323
10 days ago
11-34822
11 days ago
11-34533
11 days
38908 CBirkbeck
author:CBirkbeck
 feat(NumberTheory/ModularForms): API lemmas for level-1 graded ring Adds API lemmas extracted from #38813 to keep that PR reviewable: `DirectSum.of_eq_of_eq`, `DirectSum.of_eq_sub_add_smul`, `ModularForm.cast_apply`, `ModularForm.mul_ne_zero`, `ModularForm.sub_smul_isCuspForm`. LLM-generated 41/0 Mathlib/Algebra/DirectSum/Basic.lean,Mathlib/Algebra/DirectSum/Module.lean,Mathlib/NumberTheory/ModularForms/Basic.lean,Mathlib/NumberTheory/ModularForms/CuspFormSubmodule.lean,Mathlib/NumberTheory/ModularForms/QExpansion.lean 5 3 ['CBirkbeck', 'github-actions', 'mathlib-merge-conflicts'] nobody
10-28025
10 days ago
unknown
0-0
0 seconds
38909 CBirkbeck
author:CBirkbeck
 feat(RingTheory/MvPolynomial/WeightedHomogeneous): sub, eq_zero_of_no_monomials, eq_monomial_of_unique_weight Adds three weighted-homogeneous API lemmas extracted from #38813 to keep that PR reviewable: `IsWeightedHomogeneous.sub`, `eq_zero_of_no_monomials`, `eq_monomial_of_unique_weight`. LLM-generated 25/0 Mathlib/RingTheory/MvPolynomial/WeightedHomogeneous.lean 1 1 ['github-actions'] nobody
10-27756
10 days ago
unknown
0-0
0 seconds
25427 Paul-Lez
author:Paul-Lez
 feat(Analysis/Calculus/PartialDerivatives): Propose notation for partial derivatives. This PR introduces a notation for partial derivatives, taken with respect to a canonical basis. The idea here is that this might be useful for e.g. writing down PDEs. The notation allows use to write things like ```lean -- The canonical basis for `ℝ × ℝ` is indexed by `Fin 0` so `∂₀[ℝ]` corresponds to taking -- the first partial derivative example : (∂₀[ℝ] fun (x : ℝ × ℝ) => x.1) 0 = 1 := by simp [Pi.zero_def, lineDeriv] ``` This has already been discussed on Zulip [here](https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/Partial.20derivatives). I've opened this PR as a draft in order to get preliminary feedback on the contents (e.g. is this appropriate for Mathlib?); the file contains some demos of the notation in action. Co-authored-by: Eric Wieser --- - [ ] depends on: #25425 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-analysis 195/0 Mathlib.lean,Mathlib/Analysis/Calculus/PartialDerivatives/Notation.lean,Mathlib/LinearAlgebra/Basis/HasCanonicalBasis.lean 3 16 ['Paul-Lez', 'github-actions', 'leanprover-community-bot-assistant', 'lecopivo', 'mathlib-dependent-issues', 'ocfnash'] nobody
10-27338
10 days ago
unknown
0-0
0 seconds
39258 CBirkbeck
author:CBirkbeck
 feat(NumberTheory/ModularForms): E₄, E₆ surjectively map onto level-1 graded ring Defines the evaluation homomorphism `evalE₄E₆ : ℂ[X₀, X₁] →ₐ[ℂ] ⨁ k, ModularForm 𝒮ℒ k` sending `X₀ ↦ E₄`, `X₁ ↦ E₆`, and proves it is surjective: every level-1 modular form is a polynomial in `E₄` and `E₆`. First half of the original PR #38813 (the injectivity argument + final equivalence lands in #38813 after this merges). ## Main results - `ModularForm.evalE₄E₆`: the evaluation homomorphism. - `ModularForm.evalE₄E₆_surjective`. - [ ] depends on: #38908 This PR was done with the help of Claude Code. blocked-by-other-PR 321/0 Mathlib.lean,Mathlib/Algebra/DirectSum/Basic.lean,Mathlib/Algebra/DirectSum/Module.lean,Mathlib/NumberTheory/ModularForms/Basic.lean,Mathlib/NumberTheory/ModularForms/CuspFormSubmodule.lean,Mathlib/NumberTheory/ModularForms/GradedRing.lean,Mathlib/NumberTheory/ModularForms/QExpansion.lean,Mathlib/RingTheory/MvPolynomial/WeightedHomogeneous.lean 8 2 ['github-actions', 'mathlib-dependent-issues'] nobody
10-23767
10 days ago
unknown
0-0
0 seconds
38813 CBirkbeck
author:CBirkbeck
 feat(NumberTheory/ModularForms): E₄ and E₆ generate the graded ring of level-1 modular forms freely Establishes that `E₄` and `E₆` are algebraically independent and generate the graded ring `⨁ k, ModularForm 𝒮ℒ k` of level-1 modular forms freely as a `ℂ`-algebra. The surjectivity half (the evaluation homomorphism `evalE₄E₆` and proof that every level-1 modular form is a polynomial in `E₄` and `E₆`) is split out into #39258. This PR adds injectivity and combines both into the algebra isomorphism. ## Main results - `ModularForm.evalE₄E₆_injective`: `evalE₄E₆` is injective (`E₄` and `E₆` are algebraically independent). - `ModularForm.modularFormsEquivMvPolynomial`: the algebra isomorphism `ℂ[X₀, X₁] ≃ₐ[ℂ] ⨁ k, ModularForm 𝒮ℒ k`. - `ModularForm.E₄E₆_generate`: `E₄, E₆` generate the graded ring as a `ℂ`-algebra. - [ ] depends on: #39258 (surjectivity) - [ ] depends on: #38909 (mvpolynomial weighted-homogeneous API) This PR was done with the help of Claude Code. t-number-theory blocked-by-other-PR LLM-generated 814/0 Mathlib.lean,Mathlib/Algebra/DirectSum/Basic.lean,Mathlib/Algebra/DirectSum/Module.lean,Mathlib/NumberTheory/ModularForms/Basic.lean,Mathlib/NumberTheory/ModularForms/CuspFormSubmodule.lean,Mathlib/NumberTheory/ModularForms/GradedRing.lean,Mathlib/NumberTheory/ModularForms/QExpansion.lean,Mathlib/RingTheory/MvPolynomial/WeightedHomogeneous.lean 8 9 ['CBirkbeck', 'github-actions', 'mathlib-dependent-issues'] nobody
10-23679
10 days ago
unknown
0-0
0 seconds
38887 Rosario-Leonardi-CT
author:Rosario-Leonardi-CT
 feat(Analysis/Fourier/ZMod): add dft_star_comp Adds `ZMod.dft_star_comp`, expressing that `𝓕 (star ∘ Φ) k = star (𝓕 Φ (-k))`, the discrete analogue of the Fourier transform's interaction with complex conjugation, complementing the existing `dft_comp_neg`. --- AI disclosure: lemma statement and proof drafted with assistance from Claude Code; verified by the Lean compiler with no `sorry` and standard axioms only (`propext`, `Classical.choice`, `Quot.sound`). t-analysis new-contributor awaiting-author 9/0 Mathlib/Analysis/Fourier/ZMod.lean 1 8 ['Rosario-Leonardi-CT', 'github-actions', 'wwylele'] j-loreaux
assignee:j-loreaux
10-20663
10 days ago
14-14481
14 days ago
5-6447
5 days
35672 dennj
author:dennj
 feat(RingTheory/Polynomial/Cyclotomic): vanishing sums and fiber equidistribution at primitive roots ## Summary Building on `sum_eq_zero_iff_forall_eq` from #34592, this PR adds: - cyclotomic_dvd_of_aeval_eq_zero, exists_int_smul_cyclotomic_of_natDegree_le_totient — integer polynomials vanishing at a primitive n-th root are divisible by cyclotomic n ℤ, and (for degree ≤ φ(n)) integer multiples of it. - sum_eq_zero_iff_forall_eq and its ℤ / ZMod p variants — vanishing iff all coefficients equal. - sum_fiber_eq_sum_fiber_of_sum_weighted_pow_eq_zero, card_fiber_eq_card_div_of_sum_pow_eq_zero — fiber equidistribution. - cyclotomic_prime_coeff — the formula (cyclotomic p R).coeff i = if i < p then 1 else 0, generalising existing coeff_zero/coeff_one lemmas. - References: [deLauneyFlannery2011, Lemma 2.8.5] (underlying ℚ/ℕ fact) and [armario2024, Lemma 7 and Theorem 3] (ℤ statement and the fiber-counting application). Theorems imported from: https://github.com/Latinum-Agentic-Commerce/AlgebraicDesignTheory Human made PR with LLM used for documentation and proof golfing t-ring-theory new-contributor LLM-generated 128/2 Mathlib/RingTheory/Polynomial/Cyclotomic/Basic.lean,Mathlib/RingTheory/Polynomial/Cyclotomic/Roots.lean,docs/references.bib 3 6 ['dennj', 'github-actions', 'grunweg', 'ocfnash'] ocfnash
assignee:ocfnash
10-16646
10 days ago
17-6987
17 days ago
35-20808
35 days
18551 joelriou
author:joelriou
 feat(AlgebraicGeometry): the algebraic De Rham complex If `B` is an `A`-algebra, we construct the algebraic De Rham complex of `B` over `A`: it is a cochain complex of `A`-modules. --- - [ ] depends on: #18735 - [ ] depends on: #18662 - [ ] depends on: #26464 - [ ] depends on: #26465 - [x] depends on: #18534 - [x] depends on: #18440 - [x] depends on: #18432 - [x] depends on: #18408 - [x] depends on: #18389 - [x] depends on: #18374 - [x] depends on: #18359 - [x] depends on: #18332 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) WIP t-algebra blocked-by-other-PR merge-conflict t-algebraic-geometry
label:t-algebra$
 2836/156 Mathlib.lean,Mathlib/Algebra/Category/ModuleCat/ExteriorPower.lean,Mathlib/Algebra/Module/Presentation/Basic.lean,Mathlib/Algebra/Module/Presentation/Cokernel.lean,Mathlib/Algebra/Module/Presentation/Differentials.lean,Mathlib/Algebra/Module/Presentation/DirectSum.lean,Mathlib/Algebra/Module/Presentation/ExteriorPower.lean,Mathlib/Algebra/Module/Presentation/PiTensor.lean,Mathlib/Algebra/Module/Presentation/RestrictScalars.lean,Mathlib/Algebra/Module/Presentation/Tensor.lean,Mathlib/Analysis/NormedSpace/Multilinear/Curry.lean,Mathlib/Analysis/NormedSpace/PiTensorProduct/ProjectiveSeminorm.lean,Mathlib/Data/Finsupp/Defs.lean,Mathlib/Data/Sum/Basic.lean,Mathlib/LinearAlgebra/ExteriorPower/Basic.lean,Mathlib/LinearAlgebra/ExteriorPower/Generators.lean,Mathlib/LinearAlgebra/Multilinear/Basic.lean,Mathlib/LinearAlgebra/Multilinear/TensorProduct.lean,Mathlib/LinearAlgebra/PiTensorProduct/Basic.lean,Mathlib/LinearAlgebra/PiTensorProduct/Finite.lean,Mathlib/LinearAlgebra/PiTensorProduct/Generators.lean,Mathlib/LinearAlgebra/Span.lean,Mathlib/LinearAlgebra/TensorPower.lean,Mathlib/Logic/Function/Basic.lean,Mathlib/RingTheory/DeRham/Basic.lean,Mathlib/RingTheory/PiTensorProduct.lean 26 2 ['github-actions', 'mathlib4-dependent-issues-bot'] nobody
10-16535
10 days ago
unknown
0-0
0 seconds
25848 joelriou
author:joelriou
 feat/refactor: redefinition of homology + derived categories This PR contains a redefinition of homology, theorems about localization of categories, including triangulated categories, a construction of the derived category of an abelian category, derived functors, spectral sequences, etc. (This is made a PR only to facilitate navigation in the code of this branch.) This formalization is outlined in the paper _Formalization of derived categories in Lean/mathlib_ https://hal.science/hal-04546712 The homology of `ShortComplex C` (diagrams of two composable morphisms whose composition is zero) is developed in `Algebra.Homology.ShortComplex`. The files in that folder have been added one by one in separate PRs, and then, the current definition of `homology` has been replaced by this new definition in a refactor PR.
Homology refactor: * #4203 * #4204 * #4388 * #4609 * #4645 * #4787 * #4853 * #5250 * #5674 * #6008 * #6039 * #6089 * #6227 * #6230 * #6231 * #6245 * #6267 * #6279 * #6324 * #6443 * #6586 * #6994 * #7042 * #7047 * #7052 * #7192 * #7193 * #7194 * #7195 * #7197 * #7256 * #7262 * #7280 * #7623 * #7624 * #7806 * #7816 * #7817 * #7821 * #7954 * #7966 * #7993 * #7995 * #7996 * #7997 * #8058 * #8060 * #8069 * #8079 * #8081 * #8084 * #8091 * #8113 * #8114 * #8152 * #8159 * #8174 * #8200 * #8206 * #8208 * #8472 * #8468 * #8475 * #8490 * #8491 * #8507 * #8512 * #8593 * #8595 * #8706 * #8765 * #8766 * #8845 * #9022 * #12649 * #12638
Homological complexes: * #9333 * #9335 * #9331
Localization of categories: * #6233 * #6235 * #6236 * #6867 * #6869 * #6887 * #6882 * #8041 * #8055 * #8069 * #8516 * #8864 * #8865 * #9702 * #9692 * #10606 * #10607 * #11721 * #11728 * #11737 * #12728
Shifts on categories: * #4429 * #6652 * #6653 * #6655 * #7268 * #7270 * #9001 * #11764
Triangulated categories: * #6377 * #6688 * #6815 * #7053 * #7324 * #7327 * #7336 * #7626 * #7641 * #9049 * #9073 * #10527 * #11738 * #11740 * #11759 * #11786 * #11789 * #11805 * #12619
Construction of the derived category: * #6626 * #6701 * #6720 * #6894 * #7048 * #7049 * #7050 * #7201 * #7656 * #8937 * #8966 * #8969 * #8970 * #9054 * #9447 * #8951 * #9483 * #9508 * #9509 * #9592 * #9614 * #9615 * #9032 * #9370 * #9550 * #9686 * #9660 * #11760 * #11782 * #11806
Derived functors: * #10195 * #10270 * #10301 * #10384 * #10413 * #12168 * #12627 * #12631 * #12633 * #12785 * #12788
Refactor of Ext-groups: * #12607
- [x] depends on: #24309 - [ ] depends on: #24275 - [x] depends on: #24191 - [ ] depends on: #23797 - [x] depends on: #22586 - [x] depends on: #22556 - [x] depends on: #22547 - [x] depends on: #22539 - [ ] depends on: #22508 - [x] depends on: #22450 - [ ] depends on: #23915 --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) --- *This PR continues the work from #4197.* *Original PR: https://github.com/leanprover-community/mathlib4/pull/4197*		 WIP t-category-theory large-import t-topology merge-conflict 31074/258 Mathlib.lean,Mathlib/Algebra/Category/ModuleCat/Free.lean,Mathlib/Algebra/Homology/Additive.lean,Mathlib/Algebra/Homology/BicomplexColumns.lean,Mathlib/Algebra/Homology/BicomplexRows.lean,Mathlib/Algebra/Homology/Bifunctor.lean,Mathlib/Algebra/Homology/BifunctorColimits.lean,Mathlib/Algebra/Homology/BifunctorCommShift.lean,Mathlib/Algebra/Homology/BifunctorHomotopy.lean,Mathlib/Algebra/Homology/BifunctorMappingCone.lean,Mathlib/Algebra/Homology/BifunctorShift.lean,Mathlib/Algebra/Homology/BifunctorSingle.lean,Mathlib/Algebra/Homology/BifunctorTriangulated.lean,Mathlib/Algebra/Homology/CategoryWithHomology.lean,Mathlib/Algebra/Homology/CochainComplexMinus.lean,Mathlib/Algebra/Homology/CochainComplexOpposite.lean,Mathlib/Algebra/Homology/ComplexShape.lean,Mathlib/Algebra/Homology/ConnectShortExact.lean,Mathlib/Algebra/Homology/DerivedCategory/Basic.lean,Mathlib/Algebra/Homology/DerivedCategory/DerivabilityStructureInjectives.lean,Mathlib/Algebra/Homology/DerivedCategory/DerivabilityStructureKInjectives.lean,Mathlib/Algebra/Homology/DerivedCategory/DerivabilityStructureProjectives.lean,Mathlib/Algebra/Homology/DerivedCategory/Fractions.lean,Mathlib/Algebra/Homology/DerivedCategory/FullyFaithful.lean,Mathlib/Algebra/Homology/DerivedCategory/HomologySequence.lean,Mathlib/Algebra/Homology/DerivedCategory/KInjective.lean,Mathlib/Algebra/Homology/DerivedCategory/KProjective.lean,Mathlib/Algebra/Homology/DerivedCategory/Minus.lean,Mathlib/Algebra/Homology/DerivedCategory/Monoidal.lean,Mathlib/Algebra/Homology/DerivedCategory/Plus.lean,Mathlib/Algebra/Homology/DerivedCategory/RightDerivedFunctorPlus.lean,Mathlib/Algebra/Homology/DerivedCategory/SingleTriangle.lean,Mathlib/Algebra/Homology/DerivedCategory/SpectralObject.lean,Mathlib/Algebra/Homology/DerivedCategory/TStructure.lean,Mathlib/Algebra/Homology/Double.lean,Mathlib/Algebra/Homology/DoubleHomology.lean,Mathlib/Algebra/Homology/Embedding/CochainComplex.lean,Mathlib/Algebra/Homology/Embedding/CochainComplexTrunc.lean,Mathlib/Algebra/Homology/Embedding/ComplementaryTrunc.lean,Mathlib/Algebra/Homology/Embedding/ExtendMap.lean,Mathlib/Algebra/Homology/Embedding/HomEquiv.lean,Mathlib/Algebra/Homology/Embedding/StupidFiltration.lean,Mathlib/Algebra/Homology/Embedding/StupidTrunc.lean,Mathlib/Algebra/Homology/Embedding/TruncGE.lean,Mathlib/Algebra/Homology/Embedding/TruncGEHomology.lean,Mathlib/Algebra/Homology/Embedding/TruncLE.lean,Mathlib/Algebra/Homology/Embedding/TruncLEHomology.lean,Mathlib/Algebra/Homology/Factorizations/Basic.lean,Mathlib/Algebra/Homology/Factorizations/CM5a.lean,Mathlib/Algebra/Homology/HomologicalBicomplex.lean,Mathlib/Algebra/Homology/HomologicalComplex.lean,Mathlib/Algebra/Homology/HomologicalComplexFunctorEquiv.lean,Mathlib/Algebra/Homology/HomologicalComplexLimits.lean,Mathlib/Algebra/Homology/Homology.lean,Mathlib/Algebra/Homology/HomologySequence.lean,Mathlib/Algebra/Homology/HomologySequenceLemmas.lean,Mathlib/Algebra/Homology/Homotopy.lean,Mathlib/Algebra/Homology/HomotopyCategory.lean,Mathlib/Algebra/Homology/HomotopyCategory/Acyclic.lean,Mathlib/Algebra/Homology/HomotopyCategory/DegreewiseSplit.lean,Mathlib/Algebra/Homology/HomotopyCategory/Devissage.lean,Mathlib/Algebra/Homology/HomotopyCategory/HomComplex.lean,Mathlib/Algebra/Homology/HomotopyCategory/HomComplexShift.lean,Mathlib/Algebra/Homology/HomotopyCategory/KInjective.lean,Mathlib/Algebra/Homology/HomotopyCategory/MappingCone.lean,Mathlib/Algebra/Homology/HomotopyCategory/Minus.lean,Mathlib/Algebra/Homology/HomotopyCategory/Monoidal.lean,Mathlib/Algebra/Homology/HomotopyCategory/MonoidalTriangulated.lean,Mathlib/Algebra/Homology/HomotopyCategory/Plus.lean,Mathlib/Algebra/Homology/HomotopyCategory/PreservesQuasiIso.lean,Mathlib/Algebra/Homology/HomotopyCategory/Pretriangulated.lean,Mathlib/Algebra/Homology/HomotopyCategory/Shift.lean,Mathlib/Algebra/Homology/HomotopyCategory/ShiftSequence.lean,Mathlib/Algebra/Homology/HomotopyCategory/ShortExact.lean,Mathlib/Algebra/Homology/HomotopyCategory/SingleFunctors.lean,Mathlib/Algebra/Homology/HomotopyCofiber.lean,Mathlib/Algebra/Homology/HomotopyFiber.lean,Mathlib/Algebra/Homology/LeftResolution/Basic.lean,Mathlib/Algebra/Homology/LeftResolution/CochainComplex.lean,Mathlib/Algebra/Homology/LeftResolution/CochainComplexMinus.lean,Mathlib/Algebra/Homology/Localization.lean,Mathlib/Algebra/Homology/ModelCategory/Injective.lean,Mathlib/Algebra/Homology/ModelCategory/Projective.lean,Mathlib/Algebra/Homology/Monoidal.lean,Mathlib/Algebra/Homology/ObjectProperty.lean,Mathlib/Algebra/Homology/Opposite.lean,Mathlib/Algebra/Homology/PreservesQuasiIso.lean,Mathlib/Algebra/Homology/QuasiIso.lean,Mathlib/Algebra/Homology/ShortComplex/Basic.lean,Mathlib/Algebra/Homology/ShortComplex/Exact.lean,Mathlib/Algebra/Homology/ShortComplex/FiveLemma.lean,Mathlib/Algebra/Homology/ShortComplex/FourLemma.lean,Mathlib/Algebra/Homology/ShortComplex/HomologicalComplex.lean,Mathlib/Algebra/Homology/ShortComplex/Images.lean,Mathlib/Algebra/Homology/ShortComplex/Preadditive.lean,Mathlib/Algebra/Homology/ShortComplex/ShortComplexFive.lean,Mathlib/Algebra/Homology/ShortComplex/ShortComplexFour.lean,Mathlib/Algebra/Homology/ShortComplex/ULift.lean,Mathlib/Algebra/Homology/Single.lean,Mathlib/Algebra/Homology/SpectralObject/Convergence.lean 290 11 ['github-actions', 'mathlib-merge-conflicts', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
10-14350
10 days ago
343-15859
343 days ago
0-2
2 seconds
26464 joelriou
author:joelriou
 feat(LinearAlgebra): generators of pi tensor products In this PR, we show that the `R`-module `⨂[R] i, M i` is finitely generated if the index type is finite and all `M i` are finitely generated. This follows from a more precise result about generators of `⨂[R] i, M i`. --- This PR continues the work from #18725. Original PR: https://github.com/leanprover-community/mathlib4/pull/18725 file-removed t-algebra
label:t-algebra$
 260/7 Mathlib.lean,Mathlib/Analysis/Normed/Module/PiTensorProduct/ProjectiveSeminorm.lean,Mathlib/Data/SubtypeNeLift.lean,Mathlib/LinearAlgebra/PiTensorProduct/Basic.lean,Mathlib/LinearAlgebra/PiTensorProduct/DFinsupp.lean,Mathlib/LinearAlgebra/PiTensorProduct/DirectSum.lean,Mathlib/LinearAlgebra/PiTensorProduct/Finite.lean,Mathlib/LinearAlgebra/PiTensorProduct/Generators.lean,Mathlib/LinearAlgebra/TensorPower/Basic.lean,Mathlib/LinearAlgebra/TensorPower/Symmetric.lean,Mathlib/Logic/Equiv/Option.lean,Mathlib/RingTheory/PiTensorProduct.lean,Mathlib/SetTheory/Cardinal/Finite.lean 13 35 ['eric-wieser', 'github-actions', 'joelriou', 'leanprover-community-bot-assistant', 'mathlib-merge-conflicts', 'mathlib4-merge-conflict-bot', 'riccardobrasca'] mattrobball
assignee:mattrobball
10-13509
10 days ago
10-20571
10 days ago
107-33110
107 days
27392 Paul-Lez
author:Paul-Lez
 feat(Tactic/SimpUtils): add simproc finding commands This PR adds some commands to allow users to find simprocs/dsimprocs/simp theorems that match on a given pattern. Thanks to Robin Arnez for telling me about `simprocDeclExt` :) --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) awaiting-author t-meta 173/0 Mathlib.lean,Mathlib/Tactic.lean,Mathlib/Tactic/SimpUtils.lean,MathlibTest/SimpUtils.lean 4 14 ['Paul-Lez', 'Vierkantor', 'eric-wieser', 'github-actions', 'kmill', 'mathlib4-merge-conflict-bot'] nobody
10-13090
10 days ago
302-32417
302 days ago
0-5960
1 hour
39255 jcommelin
author:jcommelin
 chore(Tactic): abstract over Stacks attribute, add Wikidata attribute This PR abstracts some of the functionality that sets up the Stacks attribute, and uses the new abstraction to add a Wikidata attribute. Co-authored with Claude Code. --- - [x] depends on: #39257 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) file-removed LLM-generated merge-conflict 349/257 Mathlib.lean,Mathlib/Algebra/Group/Defs.lean,Mathlib/Algebra/Ring/Defs.lean,Mathlib/CategoryTheory/Category/Basic.lean,Mathlib/Tactic.lean,Mathlib/Tactic/CrossRefAttribute.lean,Mathlib/Tactic/StacksAttribute.lean,Mathlib/Topology/Irreducible.lean,Mathlib/Topology/JacobsonSpace.lean,Mathlib/Topology/Separation/Basic.lean,Mathlib/Topology/Separation/Regular.lean,Mathlib/Topology/Spectral/Hom.lean,MathlibTest/CrossRefAttribute.lean,scripts/noshake.json 14 3 ['github-actions', 'grunweg', 'mathlib-dependent-issues'] nobody
10-7938
10 days ago
unknown
0-0
0 seconds
39267 MichaelStollBayreuth
author:MichaelStollBayreuth
 perf: increase some instance priorities --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) WIP t-algebra
label:t-algebra$
 43/19 Mathlib/Algebra/Polynomial/Bivariate.lean,Mathlib/Algebra/Polynomial/Coeff.lean,Mathlib/Algebra/Polynomial/Eval/Degree.lean,Mathlib/Algebra/Quaternion.lean,Mathlib/Algebra/Ring/Defs.lean,Mathlib/Analysis/Calculus/FDeriv/Add.lean,Mathlib/Data/Nat/Choose/Vandermonde.lean,Mathlib/FieldTheory/IsAlgClosed/Spectrum.lean,Mathlib/FieldTheory/SeparableClosure.lean,Mathlib/RingTheory/Extension/Cotangent/BaseChange.lean,Mathlib/RingTheory/Finiteness/Basic.lean,Mathlib/RingTheory/Polynomial/IsIntegral.lean,Mathlib/RingTheory/Spectrum/Prime/ChevalleyComplexity.lean,Mathlib/Topology/Algebra/Polynomial.lean 14 1 ['github-actions'] nobody
10-1213
10 days ago
10-8730
10 days ago
0-1
1 second
34288 winstonyin
author:winstonyin
 feat: Integral curve is smooth in initial condition I prove the local smoothness theorem for integral curves of ODEs on Banach spaces with respect to the initial condition. Serge Lang's _Fundamentals of Differential Geometry_ gives two proofs (Theorem 1.11). The first one is based on Grönwall's inequality. The second one (p. 81 onwards) is based on the implicit function theorem, found by Pugh and Robbin 1968. I've chosen to formalise the second, even though it may be more involved. I wanted to do this as a challenge, and because the second proof also applies to $H^k$ vector fields (Ebin and Marsden 1970), which are not yet in Mathlib. I am open to splitting this up into several smaller PRs. ## Statement Let $f : E \to E$ be a vector field that is $C^n$ at $x_0 : E$ with $n \geq 1$. There exists a neighbourhood $U$ of $x_0$ and time interval $[t_{\mathrm{min}},t_{\mathrm{max}}]$ containing $t_0$ such that for every $x \in U$, there exists an integral curve $\alpha_x : C([t_{\mathrm{min}},t_{\mathrm{max}}], E)$ of $f$ with initial condition $\alpha_x(t_0) = x$, and that $x \mapsto \alpha_x$ is $C^n$. Note that this is not the full smoothness theorem for local flows, which states that the local flow $\alpha : [t_{\mathrm{min}},t_{\mathrm{max}}] \times U \to E$ is $C^n$ at $(t_0, x_0)$. We will prove this in a series of future PRs. ## Proof strategy * Define implicit equation $T_f : E \times C([t_{\mathrm{min}},t_{\mathrm{max}}],E) \to C([t_{\mathrm{min}},t_{\mathrm{max}}],E)$ so that $T(x,\alpha) = 0$ implies that $\alpha$ is an integral curve of $f$ with initial condition $x$. * Prove implicit equation is $C^n$ if $f$ is $C^n$. * Prove $\partial_\alpha T_f$ is invertible for some choice of $[t_{\mathrm{min}},t_{\mathrm{max}}]$. * Extract the local flow $(x : E) \mapsto (\alpha_x : C([t_{\mathrm{min}},t_{\mathrm{max}}],E))$ as the implicit function of $T_f$ around a known integral curve. * Conclude that $x \mapsto \alpha_x$ is $C^n$. ## For reviewers * Where should `Set.Icc.abs_sub_le` go? * Some proofs (marked with TODO) can be shortened after #34120, but I don't want it to be blocking. - [x] depends on: #34860 - [x] depends on: #34861 - [x] depends on: #34862 --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-analysis awaiting-author 863/0 Mathlib.lean,Mathlib/Analysis/ODE/SmoothFlow.lean,Mathlib/Topology/MetricSpace/Pseudo/Lemmas.lean 3 8 ['github-actions', 'idontgetoutmuch', 'j-loreaux', 'mathlib-dependent-issues', 'mathlib-merge-conflicts'] j-loreaux
assignee:j-loreaux
10-850
10 days ago
73-22135
73 days ago
14-50302
14 days
26394 winstonyin
author:winstonyin
 feat: existence of local flows on manifolds This PR continues the work from #21777. Original PR: https://github.com/leanprover-community/mathlib4/pull/21777 Transfer the existence theorem of local flows on vector spaces to manifolds. The precise statement is: > If a vector field `v` on a manifold `M` is continuously differentiable at an interior point `x₀`, then for a given `t₀` there exists a neighbourhood `u` of `x₀`, a positive `ε`, and `γ : M → ℝ → M` such that `γ x` is an integral curve of `v` on `(t₀ - ε, t₀ + ε)` for all `x ∈ u`. This is powerful because all curves `γ x` (each with initial condition `x ∈ u`) share the same existence time interval `(t₀ - ε, t₀ + ε)`, rather than each curve having its own `ε`. This will allow us to show that $C^1$ vector fields on compact manifolds always have global integral curves / global flows. Any suggestions to shorten the proof or split out useful lemmas are welcome! - [x] depends on: #26392 --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-differential-geometry 138/61 Mathlib/Analysis/ODE/PicardLindelof.lean,Mathlib/Geometry/Manifold/IntegralCurve/ExistUnique.lean,Mathlib/Order/Filter/Prod.lean 3 7 ['github-actions', 'leanprover-community-bot-assistant', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot', 'ocfnash', 'winstonyin'] ocfnash
assignee:ocfnash
10-475
10 days ago
10-475
10 days ago
17-63392
17 days
39230 bryangingechen
author:bryangingechen
 chore: extract API from #38807 and golf I wanted to understand why these two proofs in #38807 were long (and also play around more with the API in this corner of the library) so I walked through them with Claude Opus. prepared with Claude code t-order LLM-generated 23/37 Mathlib/Order/Bounds/Basic.lean,Mathlib/Order/DirSupClosed.lean 2 2 ['github-actions', 'vihdzp'] nobody
9-84086
9 days ago
10-72322
10 days ago
10-72033
10 days
35043 winstonyin
author:winstonyin
 refactor(Analysis/ODE): restate existence and uniqueness using integral curve API * Create `Mathlib/Analysis/ODE/ExistUnique.lean` to collect existence and uniqueness results for ODEs stated in terms of the integral curve API (`IsIntegralCurve`, `IsIntegralCurveOn`, `IsIntegralCurveAt`). * Move and restate the Picard-Lindelöf existence theorems from `PicardLindelof.lean` and the $C^1$ vector field results using `IsIntegralCurveOn`/`IsIntegralCurveAt` instead of raw `HasDerivWithinAt`/`HasDerivAt`. * Move and restate the Grönwall-based uniqueness theorems from `Gronwall.lean` using `IsIntegralCurveOn` with half-open intervals (`Ico`/`Ioc`) instead of `HasDerivWithinAt … (Ici t)`/`HasDerivWithinAt … (Iic t)`. * Rename uniqueness theorems to use dot notation on the integral curve types (e.g. `ODE_solution_unique_of_mem_Icc_right` becomes `IsIntegralCurveOn.eqOn_Icc_right`). * Add `IsIntegralCurveOn.eqOn_inter`: if two integral curves on preconnected sets `I` and `J` agree at a point in both sets, they agree on `I ∩ J`. * Add deprecation aliases for all renamed lemmas. - [ ] depends on: #29186 --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-analysis 421/308 Mathlib.lean,Mathlib/Analysis/ODE/ExistUnique.lean,Mathlib/Analysis/ODE/Gronwall.lean,Mathlib/Analysis/ODE/PicardLindelof.lean,Mathlib/Geometry/Manifold/IntegralCurve/ExistUnique.lean,docs/1000.yaml,docs/undergrad.yaml 7 8 ['github-actions', 'mathlib-dependent-issues', 'mathlib-merge-conflicts', 'mcdoll', 'winstonyin'] sgouezel
assignee:sgouezel
9-83813
9 days ago
9-83662
9 days ago
42-56695
42 days
32305 faenuccio
author:faenuccio
 feat: define Sobolev Spaces Nothing to see yet. --- - [x] depends on: #32250 - [x] depends on: #31809 - [ ] depends on: #39217 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict WIP t-analysis large-import 2487/53 Mathlib.lean,Mathlib/Analysis/Distribution/ContDiffMapSupportedIn.lean,Mathlib/Analysis/Distribution/Distribution.lean,Mathlib/Analysis/Distribution/TestFunction.lean,Mathlib/Analysis/Distribution/WeakDeriv.lean,Mathlib/Analysis/FunctionalSpaces/Sobolev/Basic.lean,Mathlib/MeasureTheory/Function/LocallyIntegrable.lean 7 8 ['ADedecker', 'faenuccio', 'github-actions', 'mathlib-dependent-issues', 'mathlib4-merge-conflict-bot'] nobody
9-80457
9 days ago
172-32372
172 days ago
0-2
2 seconds
38918 yuanyi-350
author:yuanyi-350
 chore(CategoryTheory/Groupoid/FreeGroupoid): remove an erw - rewrites `lift` by simplifying the quotient-lift compatibility condition with `simp only` - replaces the remaining `erw` chain with a direct rewrite through `Quiver.symmetrify_reverse` and `Groupoid.reverse_eq_inv` Extracted from #38415 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) codex LLM-generated awaiting-author 5/3 Mathlib/CategoryTheory/Groupoid/FreeGroupoid.lean 1 2 ['github-actions', 'loefflerd'] nobody
9-74401
9 days ago
9-74401
9 days ago
8-51714
8 days
39146 anovickis
author:anovickis
 feat(Analysis/CStarAlgebra/Matrix): CompactSpace instances for unitaryGroup and specialUnitaryGroup Adds `CompactSpace` instances (and supporting `IsClosed` / `IsCompact` lemmas) for the matrix unitary and special unitary groups. The compactness follows from Heine-Borel applied to the entrywise sup norm: every unitary matrix has all entries bounded by `1` (via the existing `entry_norm_bound_of_unitary` lemma), and `Matrix n n 𝕜` is finite-dimensional, so `closed + bounded ⇒ compact`. ### New declarations - `isClosed_unitaryGroup`, `isCompact_unitaryGroup` - `instance Matrix.unitaryGroup.instCompactSpace` - `isClosed_specialUnitaryGroup`, `isCompact_specialUnitaryGroup` - `instance Matrix.specialUnitaryGroup.instCompactSpace` All placed inside the existing `EntrywiseSupNorm` section in `Mathlib/Analysis/CStarAlgebra/Matrix.lean`, so the `Matrix.Norms.Elementwise` scope used for the bound is already in scope. ### Motivation These instances enable downstream constructions of compact matrix Lie groups such as flag manifolds (e.g. SU(3)/T = F₂), where the quotient inherits compactness for free via `Quotient.compactSpace`. They also fill an obvious gap in the matrix-group API: `unitary R` is known to be closed, but compactness for `Matrix.unitaryGroup` was not previously available as an instance. Claude Code / Anthropic was used for generating the code, Verification was done with lake build, each lemma reviewed. Proofs came out of F2 mass gap lean library - so compile verified t-analysis new-contributor awaiting-author 52/0 Mathlib/Analysis/CStarAlgebra/Matrix.lean 1 11 ['anovickis', 'github-actions', 'j-loreaux', 'wwylele'] nobody
9-61011
9 days ago
12-4456
12 days ago
0-7559
2 hours
35415 joneugster
author:joneugster
 feat(Cache): enable partial cache in downstream projects Migrated to fork from: #21238. Enable partial cache retrieval in downstream projects: `lake exe cache get MyProject.Basic` downloads only the relevant cache to build `MyProject/Basic.lean` --- ### Notes: - replaces: #21195 - should address: #8767 - should address: #20568 ### Completed: - [x] depends on: #21632 - [x] ~~depends on: #21663~~ - [x] depends on: #21666 - [x] depends on: #21701 - [x] depends on: #21703 - [x] depends on: #21704 - [x] depends on: #21705 - [x] depends on: #21707 - [x] depends on: #21711 - [x] depends on: #21750 - [x] depends on: #21815 - [x] depends on: #21816 - [x] depends on: #21817 - [x] depends on: #21818 - [x] depends on: #21822 - [x] depends on: #21830 - [x] depends on: #21848 - [x] depends on: #21834 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) CI t-meta awaiting-author 27/15 Cache/Hashing.lean,Cache/IO.lean,Cache/Main.lean 3 5 ['github-actions', 'kim-em', 'mathlib-dependent-issues', 'mathlib-merge-conflicts'] nobody
9-53047
9 days ago
17-62559
17 days ago
44-79297
44 days
31187 loefflerd
author:loefflerd
 feat(NumberTheory/LSeries): Define the L-series of a modular form Define the L-function of a modular form (showing it is meromorphic on C and agrees with the naive Dirichlet series for `re s` large). --- - [x] depends on: #30089 WIP t-number-theory 237/28 Mathlib.lean,Mathlib/NumberTheory/LSeries/AbstractFuncEq.lean,Mathlib/NumberTheory/LSeries/HurwitzZetaOdd.lean,Mathlib/NumberTheory/ModularForms/LFunction.lean 4 8 ['github-actions', 'mathlib-merge-conflicts', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
9-52570
9 days ago
201-23187
201 days ago
0-1
1 second
39256 Sfgangloff
author:Sfgangloff
 feat(SymbolicDynamics): add monotonicity lemma for LanguageOn In Symbolic dynamics. Proof that the language of a set of configurations is monotone with respect to inclusion of configuration sets: X ⊆ Y → LanguageOn X U ⊆ LanguageOn Y U The proof is a direct unfolding of definitions: a pattern in the language of X comes from restricting some configuration x ∈ X, and inclusion X ⊆ Y allows the same witness to be used for Y. Related to issue #39252 t-dynamics new-contributor 9/1 Mathlib/Dynamics/SymbolicDynamics/Basic.lean 1 3 ['github-actions'] nobody
9-52214
9 days ago
10-27018
10 days ago
10-26729
10 days
39282 Sfgangloff
author:Sfgangloff
 feat(SymbolicDynamics): add union morphism lemma for LanguageOn In symbolic dynamics. This PR proves that taking the language over a finite shape commutes with unions of configuration sets: $LanguageOn (X \cup Y) U = LanguageOn X U \cup LanguageOn Y U$ The proof is a direct unfolding of definitions: a pattern in the language of $X \cup Y$ comes from restricting a configuration $x ∈ X \cup Y$, and splitting on whether $x \in X$ or $x \in Y$ yields the corresponding inclusion in either $LanguageOn X U$ or $LanguageOn Y U$. The converse direction rebuilds a witness in $X \cup Y$ from either side of the union. Related to issue #39252 t-dynamics new-contributor 15/1 Mathlib/Dynamics/SymbolicDynamics/Basic.lean 1 2 ['github-actions'] nobody
9-51988
9 days ago
9-52073
9 days ago
9-51784
9 days
38071 JovanGerb
author:JovanGerb
 feat(Convert): less aggressive congruence This PR tries to make `convert` behave more predictably, disabling some of the aggressive congruence steps that `congr!` does. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-meta merge-conflict 14/8 Mathlib/Data/Fin/Tuple/Basic.lean,Mathlib/Data/List/Perm/Basic.lean,Mathlib/Tactic/Convert.lean 3 3 ['Vierkantor', 'github-actions', 'mathlib-merge-conflicts'] Vierkantor
assignee:Vierkantor
9-46949
9 days ago
37-3512
37 days ago
0-4044
1 hour
36202 vihdzp
author:vihdzp
 feat: more theorems on the Cantor normal form We also remove some redundant assumptions. Used in the CGT repo. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-set-theory 68/17 Mathlib/SetTheory/Ordinal/CantorNormalForm.lean 1 21 ['SnirBroshi', 'YaelDillies', 'github-actions', 'mathlib-merge-conflicts', 'vihdzp'] YaelDillies
assignee:YaelDillies
9-46008
9 days ago
58-45557
58 days ago
77-37229
77 days
39294 Sfgangloff
author:Sfgangloff
 feat(SymbolicDynamics): prove LanguageOn monotonicity under intersection In symbolic dynamics. This PR proves that taking the language over a finite shape is monotone with respect to intersections of configuration sets: ```math \mathrm{LanguageOn}(X \cap Y)\, U \subseteq \mathrm{LanguageOn}\, X\, U \cap \mathrm{LanguageOn}\, Y\, U ``` The proof is a direct unfolding of definitions: a pattern in the language of `X ∩ Y` comes from restricting a configuration `x ∈ X ∩ Y`. Since such an `x` belongs simultaneously to `X` and `Y`, the same restriction witness gives membership both in `LanguageOn X U` and in `LanguageOn Y U`, yielding membership in their intersection. Related to issue #39252 t-dynamics new-contributor 9/1 Mathlib/Dynamics/SymbolicDynamics/Basic.lean 1 2 ['github-actions'] nobody
9-43194
9 days ago
9-43277
9 days ago
9-42988
9 days
39297 mcdoll
author:mcdoll
 stuff --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) 45/46 Mathlib/Analysis/Distribution/SchwartzSpace/Basic.lean,Mathlib/Analysis/Distribution/SchwartzSpace/Fourier.lean,Mathlib/Analysis/Fourier/FourierTransform.lean,Mathlib/MeasureTheory/Function/L1Space/AEEqFun.lean,Mathlib/MeasureTheory/Function/L1Space/Integrable.lean,Mathlib/MeasureTheory/Integral/Prod.lean,Mathlib/Topology/Constructions/SumProd.lean 7 1 ['github-actions'] nobody
9-38037
9 days ago
unknown
0-0
0 seconds
36388 SnirBroshi
author:SnirBroshi
 feat(Combinatorics/SimpleGraph/AdjMatrix): submatrices and homomorphisms --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-combinatorics maintainer-merge 73/3 Mathlib/Combinatorics/SimpleGraph/AdjMatrix.lean 1 19 ['SnirBroshi', 'YaelDillies', 'eric-wieser', 'github-actions', 'mathlib-merge-conflicts', 'themathqueen'] nobody
9-37889
9 days ago
9-74467
9 days ago
39-24733
39 days
31176 mcdoll
author:mcdoll
 feat(Analysis): Taylor's theorem with the integral remainder Prove Taylor's theorem with the integral remainder in higher dimensions. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-analysis awaiting-author 145/1 Mathlib.lean,Mathlib/Analysis/Calculus/TaylorIntegral.lean,docs/100.yaml,docs/undergrad.yaml 4 10 ['github-actions', 'j-loreaux', 'mathlib-merge-conflicts', 'mathlib4-merge-conflict-bot', 'mcdoll', 'sgouezel'] j-loreaux
assignee:j-loreaux
9-36568
9 days ago
9-36568
9 days ago
42-57557
42 days
30109 scholzhannah
author:scholzhannah
 feat: the subcomplexes of a (relative classical) CW complex form a completely distributive lattice In this PR we prove that the space of subcomplexes `Subcomplex C` of a (relative classical) CW complex `C` is a `CompletelyDistribLattice`. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-topology 304/1 Mathlib/Topology/CWComplex/Classical/Subcomplex.lean 1 26 ['ADedecker', 'github-actions', 'j-loreaux', 'scholzhannah'] ADedecker
assignee:ADedecker
9-32824
9 days ago
28-34154
28 days ago
35-16557
35 days
39158 SnirBroshi
author:SnirBroshi
 feat(LinearAlgebra/Matrix/Rank): generalize `Matrix.rank`/`LinearMap.rank` to semirings - Generalize `Matrix.rank` from `CommRing` to `CommSemiring` - Generalize `LinearMap.rank` from `AddCommGroup`s over `Ring`s to `AddCommMonoid`s over `Semiring`s (which are the minimum requirements for `Module`) - Many `Matrix.rank` theorems now require `StrongRankCondition` explicitly (which `CommRing` used to provide) - `Matrix.cRank` theorems don't need commutativity --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra
label:t-algebra$
 58/64 Mathlib/LinearAlgebra/Dimension/LinearMap.lean,Mathlib/LinearAlgebra/Matrix/Rank.lean 2 1 ['github-actions'] nobody
9-31598
9 days ago
11-85481
11 days ago
11-85192
11 days
38762 yuanyi-350
author:yuanyi-350
 chore(AlgebraicGeometry/EllipticCurve/Projective/Point): remove erws - rewrites `neg_of_Z_ne_zero` by splitting the `Fin 3` equality and closing the coordinates with `rw` - rewrites `addXYZ_neg` with `rw` followed by `simp` Extracted from #38415 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) codex t-algebraic-geometry LLM-generated awaiting-author 6/3 Mathlib/AlgebraicGeometry/EllipticCurve/Projective/Point.lean 1 4 ['dagurtomas', 'github-actions'] dagurtomas
assignee:dagurtomas
9-30775
9 days ago
9-30775
9 days ago
12-86367
12 days
38725 yuanyi-350
author:yuanyi-350
 chore(AlgebraicGeometry/ProjectiveSpectrum): remove `erw`s - folds the `erw` steps in `isSeparated` into the surrounding `simp only` rewrites, including `affineOpenCover_f` Extracted from #38415 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebraic-geometry awaiting-author 9/12 Mathlib/AlgebraicGeometry/ProjectiveSpectrum/Proper.lean 1 3 ['dagurtomas', 'github-actions'] dagurtomas
assignee:dagurtomas
9-30738
9 days ago
9-30738
9 days ago
13-3096
13 days
38583 kim-em
author:kim-em
 feat(LinearAlgebra/Matrix/GeneralLinearGroup): polynomial functions on matrices over an infinite field are determined by their values on GL This PR adds `MvPolynomial.eq_of_eval_eq_on_gl`: two polynomials in `MvPolynomial (m × m) k` over an infinite field `k` are equal whenever their evaluations agree at every invertible matrix. The proof multiplies by the generic determinant `det (Matrix.mvPolynomialX m m k)` so that `MvPolynomial.funext` applies (covering both invertible and non-invertible specializations of the variables), then divides by it (it is nonzero by `Matrix.det_mvPolynomialX_ne_zero`) using that the polynomial ring is an integral domain. The lemma is useful when reasoning about polynomial representations of `GL n k`, where natural identities are easiest to check on `GL n k` itself but the final statement lives at the level of polynomials. The lemma is placed in a new file `Mathlib/LinearAlgebra/Matrix/GeneralLinearGroup/MvPolynomial.lean` because the existing `Mathlib/LinearAlgebra/Matrix/MvPolynomial.lean` is upstream of `Adjugate`, which is itself upstream of `GeneralLinearGroup.Defs` — so we cannot import `GeneralLinearGroup.Defs` from `Matrix.MvPolynomial` without creating a cycle. 🤖 Prepared with Claude Code t-algebra awaiting-author
label:t-algebra$
 60/0 Mathlib.lean,Mathlib/LinearAlgebra/Matrix/GeneralLinearGroup/MvPolynomial.lean 2 6 ['SnirBroshi', 'dagurtomas', 'github-actions', 'wwylele'] dagurtomas
assignee:dagurtomas
9-30059
9 days ago
9-30059
9 days ago
15-71462
15 days
39095 tb65536
author:tb65536
 feat(FieldTheory/Galois/IsGaloisGroup): `IsGaloisGroup` instance for `FixedPoints.subalgebra` This PR generalizes the existing `IsGaloisGroup` instance for `FixedPoints.intermediateField` to `FixedPoints.subalgebra`. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-ring-theory t-algebra
label:t-algebra$
 23/3 Mathlib/Algebra/Algebra/Subalgebra/Operations.lean,Mathlib/FieldTheory/Galois/IsGaloisGroup.lean,Mathlib/GroupTheory/GroupAction/Defs.lean 3 6 ['eric-wieser', 'github-actions', 'tb65536'] nobody
9-28804
9 days ago
13-4314
13 days ago
14-16284
14 days
39050 Jun2M
author:Jun2M
 feat(Combinatorics/GraphLike): `Digraph` is `GraphLike` `Digraph` has `GraphLike` instance. --- - [ ] depends on: #36743 - [ ] depends on: #39047 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-combinatorics blocked-by-other-PR 184/0 Mathlib.lean,Mathlib/Combinatorics/Digraph/GraphLike.lean,Mathlib/Combinatorics/GraphLike/Basic.lean 3 2 ['github-actions', 'mathlib-dependent-issues'] nobody
9-26151
9 days ago
15-1800
15 days ago
0-523
8 minutes
38606 dennj
author:dennj
 feat: preparation for Vanishing Sum of Roots of Unity Adds the Mathlib API extensions needed for an upcoming formalization of the Lam-style classification theorem for vanishing sums of roots of unity. * Mathlib/LinearAlgebra/LinearIndependent/Lemmas.lean + `exists_eq_const_of_sum_smul_eq_zero_of_sum_eq_zero_of_linearIndependent`: if `∑ vᵢ = 0` and the first `n-1` of `n` vectors are linearly independent, every linear relation has constant coefficients. * Mathlib/RingTheory/Radical/NatInt.lean + `Nat.totient_eq_div_radical_mul_totient_radical`: Euler's totient splits as `φ(n) = (n / rad n) * φ(rad n)`. * Mathlib/RingTheory/RootsOfUnity/PrimitiveRoots.lean + `IsPrimitiveRoot.sum_range_pow_mul_div_eq_zero_of_dvd`: the `d` evenly-spaced powers of a primitive `k`-th root sum to zero, for `d ∣ k` and `1 < d`. * Mathlib/NumberTheory/Cyclotomic/LinearDisjoint.lean (new) + `IsPrimitiveRoot.linearDisjoint_adjoin_pow_of_coprime`: cyclotomic subfields of coprime orders are linearly disjoint over `ℚ`. * Mathlib/NumberTheory/Cyclotomic/LinearRelations.lean (new) + `IsPrimitiveRoot.coeffs_eq_of_sum_pow_eq_zero_prime_coprime`: in the cyclotomic field of order `p * m` with `p` prime coprime to `m`, any `ℚ⟮ζ^p⟯`-linear relation among powers of `ζ^m` has all coefficients equal. --- I need these as preparation to start formalizing the theorem: Let k be a positive integer. If a finite family of complex k-th roots of unity sums to zero, then the size of the family is a non-negative integer combination of the prime divisors of k. --- Human-made PR with AI used for golfing and documentation new-contributor 219/0 Mathlib.lean,Mathlib/LinearAlgebra/LinearIndependent/Lemmas.lean,Mathlib/NumberTheory/Cyclotomic/LinearDisjoint.lean,Mathlib/NumberTheory/Cyclotomic/LinearRelations.lean,Mathlib/RingTheory/Radical/Totient.lean,Mathlib/RingTheory/RootsOfUnity/PrimitiveRoots.lean 6 3 ['github-actions', 'mathlib-merge-conflicts'] nobody
9-24154
9 days ago
9-2323
9 days ago
8-31594
8 days
39054 Jun2M
author:Jun2M
 feat(Combinatorics/GraphLike): `SimpleGraph` is `GraphLike` --- - [ ] depends on: #36743 - [ ] depends on: #39047 - [ ] depends on: #36829 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) blocked-by-other-PR t-combinatorics 292/0 Mathlib.lean,Mathlib/Combinatorics/GraphLike/Basic.lean,Mathlib/Combinatorics/SimpleGraph/GraphLike.lean 3 2 ['github-actions', 'mathlib-dependent-issues'] nobody
9-23517
9 days ago
14-81639
14 days ago
0-405
6 minutes
39053 Jun2M
author:Jun2M
 feat(Combinatorics/GraphLike): `Graph` is `GraphLike` --- - [ ] depends on: #36743 - [ ] depends on: #39047 - [ ] depends on: #36829 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) blocked-by-other-PR t-combinatorics 326/0 Mathlib.lean,Mathlib/Combinatorics/Graph/GraphLike.lean,Mathlib/Combinatorics/GraphLike/Basic.lean 3 2 ['github-actions', 'mathlib-dependent-issues'] nobody
9-23401
9 days ago
14-82655
14 days ago
0-242
4 minutes
39279 jayscambler
author:jayscambler
 feat(Cryptography/Sigma): Schnorr sigma protocol and signature scheme Adds `Mathlib/Cryptography/Sigma/Schnorr.lean`. New file in a new top-level directory; mathlib currently has no `Mathlib/Cryptography/`, so I've taken `Mathlib/Cryptography/Sigma/` as the natural home for sigma-protocol formalizations. The file proves the three defining properties of Schnorr's identification scheme as a sigma protocol: - `Schnorr.correct`: completeness. Honest verifier accepts honest signer's transcript. - `Schnorr.specialSoundness`: from two accepting transcripts sharing the commitment but using different challenges `c, c'`, the witness `x = (s - s') / (c - c')` is recovered. Needs `q` prime so `c - c'` is invertible in `ZMod q`. - `Schnorr.hvzkAccepts`: the HVZK simulator `g^s · (y^c)⁻¹` always yields accepting transcripts. This is the structural-correctness half of HVZK only; the distributional indistinguishability statement is a separate result and not in this PR. On top of the sigma protocol there's `Schnorr.Signature.{keyGen, sign, verify, correct}` wrapping it as a Fiat-Shamir signature scheme; `Schnorr.Signature.correct` is a one-line corollary of `Schnorr.correct`. Two auxiliary lemmas, `Schnorr.gpow_sub` and `Schnorr.gpow_mul`, bridge `ZMod q` arithmetic and group exponentiation under `Fintype.card G = q`. They're local to this file for now because the surrounding `gpow` API is itself cryptography-specific; if a general `ZMod q`-graded group action framework lands in mathlib later, both lemmas would become instances of it. There's also a small `example` instantiating everything on `Multiplicative (ZMod q)` for `Fact q.Prime` to show the API typechecks. That instantiation is a toy (DLOG is trivial in that group), but it confirms the abstraction is usable. **AI disclosure**: this PR was a collaboration between myself, Grey Haven's autocontext and Claude Opus 4.7 (Anthropic). I read each line and built locally on current master. (strawberry has three r's) new-contributor LLM-generated 352/0 Mathlib.lean,Mathlib/Cryptography/Sigma/Schnorr.lean 2 2 ['github-actions'] nobody
9-21506
9 days ago
9-21585
9 days ago
9-21786
9 days
35255 vlad902
author:vlad902
 feat(SimpleGraph): `cycleGraph.IsContained` in every graph with a cycle --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-combinatorics 35/0 Mathlib/Combinatorics/SimpleGraph/Circulant.lean 1 3 ['github-actions', 'mathlib-dependent-issues', 'mathlib-merge-conflicts'] nobody
9-18146
9 days ago
24-4618
24 days ago
24-5276
24 days
39047 Jun2M
author:Jun2M
 feat(Combinatorics/GraphLike): GraphLike with no multi edges This PR introduces `NoMultiEdgeGraphLike` (alternative name suggestion are welcome), extension of `GraphLike` for those with no multiple darts, and therefore edges, between a pair of vertices. --- - [ ] depends on: #36743 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) blocked-by-other-PR t-combinatorics 140/0 Mathlib.lean,Mathlib/Combinatorics/GraphLike/Basic.lean 2 2 ['github-actions', 'mathlib-dependent-issues'] nobody
9-17632
9 days ago
15-4548
15 days ago
0-23
23 seconds
36829 Jun2M
author:Jun2M
 feat(Combinatorics/GraphLike): introduce SymmGraphLike typeclass Per discussion at ([#graph theory > HasAdj](https://leanprover.zulipchat.com/#narrow/channel/252551-graph-theory/topic/HasAdj/with/575843445)), This PR extends `GraphLike` typeclass defined in #36743 for graphs with symmetric darts (`SimpleGraph` and `Graph`, not `Digraph`). ### Main definitions * `SymmGraphLike V D E Gr`: A typeclass extending `GraphLike` with together with `inv`, an involution function on darts that swaps `src` and `tgt`. * `NoMultiEdgeSymmGraphLike V D E Gr`: A typeclass extending `NoMultiEdgeGraphLike` and `SymmGraphLike`. --- - [ ] depends on: #36743 - [ ] depends on: #39047 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) blocked-by-other-PR t-combinatorics 245/0 Mathlib.lean,Mathlib/Combinatorics/GraphLike/Basic.lean 2 5 ['github-actions', 'mathlib-bors', 'mathlib-dependent-issues', 'mathlib-merge-conflicts'] nobody
9-17511
9 days ago
65-8052
65 days ago
0-154
2 minutes
39293 kbuzzard
author:kbuzzard
 perf: Field.toEuclideanDomain fast_instance% --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) Just an experiment. Pulled this fast_instance% off #38087 to see if it makes a difference. Will then try it after #39263 to see if it still makes a difference. WIP t-algebra
label:t-algebra$
 3/1 Mathlib/Algebra/EuclideanDomain/Field.lean 1 5 ['github-actions', 'kbuzzard', 'leanprover-radar'] nobody
9-14438
9 days ago
9-44273
9 days ago
0-2
2 seconds
38114 javgomzar
author:javgomzar
 feat(FinitelyPresentedGroup): add finite groups instance Add IsFinitelyPresented instance for finite groups. Co-authored-by: Hang Lu Su , Thomas Browning --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-group-theory new-contributor large-import 31/2 Mathlib/GroupTheory/FinitelyPresentedGroup.lean,Mathlib/GroupTheory/FreeGroup/Basic.lean 2 33 ['github-actions', 'javgomzar', 'kbuzzard', 'mathlib-merge-conflicts', 'plp127', 'tb65536', 'vihdzp'] mattrobball
assignee:mattrobball
9-13116
9 days ago
9-13152
9 days ago
32-10600
32 days
31662 edwin1729
author:edwin1729
 feat(Topology/Order): topological basis of scott topology on Complete… …PartialOrder --- [Zulip discussion](https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/.3E.20Algebraic.20complete.20partial.20order.20and.20domain.20theory/with/536359313) for this PR. (2/5) PRs in domain theory, proving that scott topologies over Algebraic DCPOs (`CompletePartialOrder`) are sober. The main reference is [Renata, Duality in Domain Theory](https://alyata.github.io/documents/duality_domain_theory.pdf). But the statements can also be found in the canonical text [Abramsky and Jung](https://www.cs.ox.ac.uk/people/samson.abramsky/handbook.pdf) This first PR proves two prerequisites, namely: - the specialization order induced by the scott topology corresponds to the existing order of the DCPO. Prop 3.1.5 in [Duality in Domain Theory](https://alyata.github.io/documents/duality_domain_theory.pdf) and Prop 2.3.2(1) in [Abramsky and Jung](https://www.cs.ox.ac.uk/people/samson.abramsky/handbook.pdf) - the upward closures of compact elements of the DCPO form a topological basis for the Scott Topology. Prop 3.5.2 in [Duality in Domain Theory](https://alyata.github.io/documents/duality_domain_theory.pdf) and Prop 2.3.6(2) in [Abramsky and Jung](https://www.cs.ox.ac.uk/people/samson.abramsky/handbook.pdf) - [x] depends on: #33061 **The next PR is here:** #31670 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-topology new-contributor awaiting-author 165/1 Mathlib.lean,Mathlib/Order/CompactlyGenerated/Basic.lean,Mathlib/Topology/Order/ScottTopology.lean,Mathlib/Topology/Order/ScottTopologyDCPO.lean,docs/references.bib 5 99 ['b-mehta', 'edwin1729', 'github-actions', 'mathlib-merge-conflicts', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot', 'plp127'] b-mehta
assignee:b-mehta
9-12017
9 days ago
17-13453
17 days ago
64-31147
64 days
33461 loefflerd
author:loefflerd
 feat(NumberTheory/Modular): stabilizers for action on upper halfplane --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) WIP 343/1 Mathlib.lean,Mathlib/Analysis/Complex/UpperHalfPlane/MoebiusAction.lean,Mathlib/Analysis/Complex/UpperHalfPlane/ProjLine.lean,Mathlib/LinearAlgebra/Matrix/GeneralLinearGroup/Defs.lean,Mathlib/LinearAlgebra/Matrix/GeneralLinearGroup/FinTwo.lean,Mathlib/LinearAlgebra/Projectivization/Action.lean,Mathlib/Topology/Compactification/OnePoint/ProjectiveLine.lean 7 21 ['github-actions', 'loefflerd', 'mathlib-merge-conflicts', 'ocfnash'] ocfnash
assignee:ocfnash
9-11541
9 days ago
141-18774
141 days ago
0-1
1 second
39291 MichaelStollBayreuth
author:MichaelStollBayreuth
 perf: change definition of EuclideanDomain class This changes the definition of `EuclideanDomain` from ```lean class EuclideanDomain (R : Type*) extends CommRing R, Nontrivial R where ... ``` to ```lean class EuclideanDomain (R : Type*) [CommRing R] [Nontrivial R] where ... ``` with the goal to see how this affects performance (type class synthesis in particular). --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra slow-typeclass-synthesis
label:t-algebra$
 35/57 Mathlib/Algebra/EuclideanDomain/Basic.lean,Mathlib/Algebra/EuclideanDomain/Defs.lean,Mathlib/Algebra/EuclideanDomain/Field.lean,Mathlib/Algebra/Order/AbsoluteValue/Euclidean.lean,Mathlib/Algebra/Polynomial/FieldDivision.lean,Mathlib/Data/ZMod/Coprime.lean,Mathlib/FieldTheory/RatFunc/AsPolynomial.lean,Mathlib/FieldTheory/RatFunc/Degree.lean,Mathlib/LinearAlgebra/Reflection.lean,Mathlib/MeasureTheory/Covering/BesicovitchVectorSpace.lean,Mathlib/NumberTheory/ClassNumber/AdmissibleAbsoluteValue.lean,Mathlib/NumberTheory/ClassNumber/Finite.lean,Mathlib/NumberTheory/ModularForms/Cusps.lean,Mathlib/NumberTheory/ModularForms/EisensteinSeries/Defs.lean,Mathlib/NumberTheory/Real/GoldenRatio.lean,Mathlib/RingTheory/DiscreteValuationRing/TFAE.lean,Mathlib/RingTheory/EuclideanDomain.lean,Mathlib/RingTheory/FractionalIdeal/Operations.lean,Mathlib/RingTheory/Ideal/NatInt.lean,Mathlib/RingTheory/Int/Basic.lean,Mathlib/RingTheory/Polynomial/Dickson.lean,Mathlib/RingTheory/PrincipalIdealDomain.lean,Mathlib/RingTheory/Radical/Basic.lean,Mathlib/RingTheory/ZMod.lean,MathlibTest/instance_diamonds.lean 25 11 ['MichaelStollBayreuth', 'github-actions', 'kbuzzard', 'leanprover-radar'] nobody
9-10642
9 days ago
9-13119
9 days ago
9-35393
9 days
35753 Vilin97
author:Vilin97
 feat(Topology/Algebra/Order): regular grid helpers and piecewise linear interpolation Make API for piecewise linear interpolation on regular grids. I need these to for ODE time-stepping methods, like forward Euler, and later Runge–Kutta methods. Follow-up PR: #35755 (forward Euler method convergence). I don't know if these numerical analysis ODE-solving methods even belong in mathlib. If someone could advise me on it, I would appreciate it. --- The initial proof was produced by [Aristotle](https://aristotle.harmonic.fun). The code was iteratively refined (factoring out lemmas, golfing, simplifying proofs) using Claude Code. - [ ] depends on: #38091 t-topology new-contributor LLM-generated maintainer-merge 201/0 Mathlib.lean,Mathlib/Topology/Algebra/Order/PiecewiseLinear.lean 2 59 ['Vilin97', 'YanYablonovskiy', 'adomani', 'botbaki-review', 'copilot-pull-request-reviewer', 'dagurtomas', 'eric-wieser', 'github-actions', 'grunweg', 'j-loreaux', 'mathlib-dependent-issues', 'wwylele'] j-loreaux
assignee:j-loreaux
9-8166
9 days ago
21-108
20 days ago
53-48899
53 days
36345 Brian-Nugent
author:Brian-Nugent
 feat(AlgebraicGeometry): Vanishing for Affine Schemes Proves that quasi-coherent sheaves on affine schemes have vanishing higher cohomology. --- - [ ] depends on: #37187 - [ ] depends on: #35785 - [ ] depends on: #34742 - [ ] depends on: #36218 - [ ] depends on: #35790 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) large-import t-algebraic-geometry t-category-theory blocked-by-other-PR merge-conflict 1711/116 Mathlib.lean,Mathlib/Algebra/Category/Grp/ForgetCorepresentable.lean,Mathlib/Algebra/Category/ModuleCat/Sheaf/Quasicoherent.lean,Mathlib/Algebra/Homology/ShortComplex/Exact.lean,Mathlib/Algebra/Module/LocalizedModule/Basic.lean,Mathlib/AlgebraicGeometry/Modules/AffineVanishing.lean,Mathlib/AlgebraicGeometry/Modules/KempfProp1.lean,Mathlib/AlgebraicGeometry/Modules/Quasicoherent.lean,Mathlib/AlgebraicGeometry/Modules/Sheaf.lean,Mathlib/AlgebraicGeometry/Modules/Tilde.lean,Mathlib/CategoryTheory/Sites/Abelian.lean,Mathlib/CategoryTheory/Sites/SheafCohomology/Basic.lean,Mathlib/CategoryTheory/Sites/SheafCohomology/ExactSequences.lean,Mathlib/Topology/Sheaves/AddCommGrpCat.lean,Mathlib/Topology/Sheaves/Flasque.lean,Mathlib/Topology/Sheaves/Presheaf.lean,Mathlib/Topology/Sheaves/Restrict.lean,Mathlib/Topology/Sheaves/Sheaf.lean,Mathlib/Topology/Sheaves/SheafCondition/Sites.lean,Mathlib/Topology/Sheaves/SheafCondition/UniqueGluing.lean,Mathlib/Topology/Sheaves/ZeroOutside.lean 21 5 ['github-actions', 'mathlib-dependent-issues', 'mathlib-merge-conflicts'] nobody
9-8059
9 days ago
unknown
0-0
0 seconds
34855 staroperator
author:staroperator
 feat(Order): use `to_dual` for `PFilter` This PR redefines `PFilter` to get rid of `OrderDual` and uses `to_dual` to translate theorems. The whole file of `PFilter` is now deprecated. Some changes: - To align with `Filter`, the order on `PFilter` is changed to the reversed set inclusion. Ultrafilters, the dual notion of maximal ideals, become minimal in this order. - `to_dual` does not work on `sequenceOfCofinals`. I left `Order.Cofinal` and the Rasiowa–Sikorski lemma not `to_dual`-ized, and we should move them to a separate file later. - `IsLEChain` is added to tag `to_dual`. - `IsCoatom.isProper`/`IsCoatom.isMaximal` is deprecated by `Order.Ideal.isProper_of_isCoatom`/`Order.Ideal.isMaximal_of_isProper`, since this result is special to ideals while `IsCoatom` namespace should be for orders in general. --- - [x] depends on: #34820 --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-order 292/242 Mathlib/Order/Atoms.lean,Mathlib/Order/BooleanAlgebra/Basic.lean,Mathlib/Order/BooleanAlgebra/Defs.lean,Mathlib/Order/CompleteLattice/Defs.lean,Mathlib/Order/Ideal.lean,Mathlib/Order/PFilter.lean,Mathlib/Order/Preorder/Chain.lean,Mathlib/Order/PrimeIdeal.lean,Mathlib/Order/PrimeSeparator.lean,Mathlib/Order/ZornAtoms.lean,Mathlib/RingTheory/IdealFilter/Basic.lean,Mathlib/RingTheory/IdealFilter/Topology.lean,Mathlib/Tactic/Translate/ToDual.lean 13 4 ['github-actions', 'mathlib-dependent-issues', 'mathlib-merge-conflicts'] nobody
9-5927
9 days ago
9-5705
9 days ago
21-28728
21 days
38664 joelriou
author:joelriou
 feat(AlgebraicTopology/SimplicialSet): more API for `SSet.op` --- TODO: fix the names of some lemmas so that they match those in #35287. - [x] depends on: #38662 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebraic-topology WIP 130/0 Mathlib/AlgebraicTopology/SimplicialSet/KanComplex/MulStruct.lean,Mathlib/AlgebraicTopology/SimplicialSet/Op.lean,Mathlib/AlgebraicTopology/SimplicialSet/StdSimplex.lean 3 6 ['github-actions', 'joelriou', 'mathlib-dependent-issues', 'mathlib-merge-conflicts'] nobody
9-3873
9 days ago
24-12875
24 days ago
0-1
1 second
39310 edegeltje
author:edegeltje
 feat(CategoryTheory/FiberedCategory/Fibered): Add composition of (strongly) cartesian morphisms and of fibered functors This PR defines the "vertical pasting" aspects of homlifts and (strongly) cartesian morphisms, it proves that the composition of fibered functors is fibered, and it proves that if an equivalence of categories has the identity natural transformation as its unit or counit, then the backward or forward directions of that equivalence are fibered functors, respectively. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-category-theory awaiting-author 179/6 Mathlib/CategoryTheory/FiberedCategory/Cartesian.lean,Mathlib/CategoryTheory/FiberedCategory/Fibered.lean,Mathlib/CategoryTheory/FiberedCategory/HomLift.lean 3 19 ['dagurtomas', 'edegeltje', 'github-actions'] nobody
9-1226
9 days ago
9-1226
9 days ago
0-17474
4 hours
38783 marcelolynch
author:marcelolynch
 experiment / do not review: breaking change for downstream do not review WIP toric carleson 7/0 Mathlib/Probability/Combinatorics/BinomialRandomGraph/Defs.lean 1 18 ['downstream-reports-automation', 'github-actions'] nobody
9-944
9 days ago
22-18270
22 days ago
0-473
7 minutes
39334 mcdoll
author:mcdoll
 feat(FunProp): tag `Monotone` and friends --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-order large-import 64/0 Mathlib/Order/Monotone/Defs.lean 1 1 ['github-actions'] nobody
9-651
9 days ago
unknown
0-0
0 seconds
32941 kim-em
author:kim-em
 feat(GroupTheory/Artin): add braid groups as Artin groups of type A This PR defines braid groups as Artin groups of type A. - `BraidGroup n`: the braid group B_n on n strands - `BraidGroup.σ`: the standard Artin generators - `BraidGroup.toPermHom`: the canonical surjection B_n → S_n - `BraidGroup.braidGroupTwoEquivInt`: B_2 ≃* ℤ - [ ] depends on: #35219 🤖 Prepared with Claude Code t-group-theory blocked-by-other-PR LLM-generated merge-conflict 590/2 Mathlib.lean,Mathlib/Algebra/Group/Commute/Defs.lean,Mathlib/Algebra/Group/End.lean,Mathlib/Algebra/Group/Subgroup/Basic.lean,Mathlib/GroupTheory/Artin/Basic.lean,Mathlib/GroupTheory/Artin/Braid.lean,Mathlib/GroupTheory/Coxeter/Matrix.lean,Mathlib/GroupTheory/Coxeter/Perm.lean,Mathlib/GroupTheory/FreeGroup/Basic.lean,Mathlib/GroupTheory/Perm/Cycle/Basic.lean,Mathlib/GroupTheory/PresentedGroup.lean 11 27 ['eric-wieser', 'github-actions', 'kim-em', 'mathlib-dependent-issues', 'mathlib-merge-conflicts', 'robin-carlier', 'tb65536', 'themathqueen'] tb65536
assignee:tb65536
8-80327
8 days ago
99-43717
99 days ago
13-11162
13 days
37928 AlexeyMilovanov
author:AlexeyMilovanov
 refactor(Computability.Encoding): unbundle Γ and remove FinEncoding This PR unbundles the alphabet `Γ` from the `Encoding` structure and completely removes `FinEncoding`. `Encoding`: The alphabet `Γ` is now an explicit parameter: `structure Encoding (α : Type u) (Γ : Type v)`. `FinEncoding`: Removed. Finiteness is now handled via standard typeclasses (e.g., `[Fintype Γ] (e : Encoding α Γ)`). Combinators: Functions like `finEncodingPair` are simplified to `encodingPair`, dropping the `fin` prefix and `[Fintype]` requirements where no longer needed. Downstream: Mechanically updated `Mathlib.Computability` and `Mathlib.ModelTheory` to pass the explicit `Γ` and use `[Fintype Γ]` where `FinEncoding` was previously required. new-contributor maintainer-merge 87/67 Mathlib/Computability/Encoding.lean,Mathlib/ModelTheory/Encoding.lean 2 9 ['AlexeyMilovanov', 'dagurtomas', 'github-actions', 'vihdzp'] nobody
8-79377
8 days ago
15-43955
15 days ago
41-23522
41 days
35217 kim-em
author:kim-em
 feat: auxiliary lemmas for Artin and braid groups This PR adds small lemmas to existing files, in preparation for the Artin groups and braid groups PRs. - `Commute.mul_pow_eq_one`: for commuting elements with `a ^ m = 1` and `b ^ m = 1` - `Equiv.Perm.swap_conjugate`: braid relation for adjacent transpositions - `Equiv.Perm.swap_mul_swap_comm_of_disjoint`: disjoint transpositions commute - `@[grind =]` attributes on `Perm.mul_apply`, `Perm.one_apply`; new `Perm.pow_add_one_apply` - `Subgroup.normalClosure_singleton_one` - `FreeGroup.ofList` and associated lemmas - `FreeGroup.freeGroupUnitMulEquivInt` - `PresentedGroup.instUniqueOfIsEmpty` - `CoxeterMatrix.Aₙ_adjacent`, `CoxeterMatrix.Aₙ_far` 🤖 Prepared with Claude Code t-group-theory LLM-generated merge-conflict 97/2 Mathlib/Algebra/Group/Commute/Defs.lean,Mathlib/Algebra/Group/End.lean,Mathlib/Algebra/Group/Subgroup/Basic.lean,Mathlib/GroupTheory/Coxeter/Matrix.lean,Mathlib/GroupTheory/FreeGroup/Basic.lean,Mathlib/GroupTheory/Perm/Cycle/Basic.lean,Mathlib/GroupTheory/PresentedGroup.lean 7 16 ['eric-wieser', 'github-actions', 'kim-em', 'mathlib-merge-conflicts', 'themathqueen'] thorimur
assignee:thorimur
8-78818
8 days ago
8-78818
8 days ago
20-78468
20 days
35218 kim-em
author:kim-em
 feat(GroupTheory/Coxeter/Perm): type A Coxeter group maps to symmetric group This PR constructs the canonical surjective homomorphism from the type A Coxeter group to the symmetric group, sending simple reflections to adjacent transpositions. - `swapFun`: maps generator `i` to `swap i.castSucc i.succ` - `swapFun_isLiftable`: adjacent transpositions satisfy the Coxeter relations - `CoxeterMatrix.typeAₙToPermHom`: the homomorphism from `(Aₙ n).Group` to `Perm (Fin (n + 1))` - `CoxeterMatrix.typeAₙToPermHom_surjective`: surjectivity - [ ] depends on: #35217 🤖 Prepared with Claude Code blocked-by-other-PR t-group-theory LLM-generated merge-conflict 214/2 Mathlib.lean,Mathlib/Algebra/Group/Commute/Defs.lean,Mathlib/Algebra/Group/End.lean,Mathlib/Algebra/Group/Subgroup/Basic.lean,Mathlib/GroupTheory/Coxeter/Matrix.lean,Mathlib/GroupTheory/Coxeter/Perm.lean,Mathlib/GroupTheory/FreeGroup/Basic.lean,Mathlib/GroupTheory/Perm/Cycle/Basic.lean,Mathlib/GroupTheory/PresentedGroup.lean 9 8 ['eric-wieser', 'github-actions', 'joneugster', 'kim-em', 'mathlib-dependent-issues', 'mathlib-merge-conflicts'] nobody
8-78816
8 days ago
98-78283
98 days ago
0-677
11 minutes
35219 kim-em
author:kim-em
 feat(GroupTheory/Artin): define Artin groups and their universal property This PR defines Artin groups (also called Artin-Tits groups) as presented groups associated to Coxeter matrices, and establishes their universal property. - `CoxeterMatrix.ArtinGroup`: the Artin group associated to a Coxeter matrix - `CoxeterMatrix.artinGenerator`: the generators of the Artin group - `CoxeterMatrix.IsArtinLiftable`: the braid relation condition for liftability - `CoxeterMatrix.artinLift`: the universal property of Artin groups - `CoxeterMatrix.artinToCoxeter`: the canonical surjection to the Coxeter group - `CoxeterMatrix.artinToCoxeter_surjective`: surjectivity - [ ] depends on: #35218 🤖 Prepared with Claude Code blocked-by-other-PR t-group-theory LLM-generated merge-conflict 429/2 Mathlib.lean,Mathlib/Algebra/Group/Commute/Defs.lean,Mathlib/Algebra/Group/End.lean,Mathlib/Algebra/Group/Subgroup/Basic.lean,Mathlib/GroupTheory/Artin/Basic.lean,Mathlib/GroupTheory/Coxeter/Matrix.lean,Mathlib/GroupTheory/Coxeter/Perm.lean,Mathlib/GroupTheory/FreeGroup/Basic.lean,Mathlib/GroupTheory/Perm/Cycle/Basic.lean,Mathlib/GroupTheory/PresentedGroup.lean 10 6 ['github-actions', 'joneugster', 'mathlib-dependent-issues', 'mathlib-merge-conflicts'] nobody
8-78815
8 days ago
98-78285
98 days ago
0-624
10 minutes
36534 Vierkantor
author:Vierkantor
 experiment: define a simproc for simplifying `a = b` from `b = a` Can we define a working simproc that tries to simplify expressions of the form `b = a` given simp lemmas talking about `a = b`? If this does not hurt build times too much, that would solve [task 40](https://github.com/mathlib-initiative/TaskList/issues/40). --- - [ ] depends on: #37850 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-logic WIP merge-conflict 146/56 Archive/Examples/IfNormalization/WithoutAesop.lean,Archive/Imo/Imo2024Q5.lean,Mathlib/Algebra/CharP/Defs.lean,Mathlib/Algebra/Exact.lean,Mathlib/Algebra/Group/Pi/Lemmas.lean,Mathlib/Algebra/GroupWithZero/Defs.lean,Mathlib/Algebra/MvPolynomial/Nilpotent.lean,Mathlib/Algebra/Order/Antidiag/Finsupp.lean,Mathlib/Algebra/Polynomial/Monic.lean,Mathlib/Analysis/CStarAlgebra/ContinuousFunctionalCalculus/Pi.lean,Mathlib/Analysis/Complex/Arg.lean,Mathlib/CategoryTheory/Preadditive/Biproducts.lean,Mathlib/Computability/ContextFreeGrammar.lean,Mathlib/Data/ENNReal/Operations.lean,Mathlib/Data/Fin/Tuple/Sort.lean,Mathlib/Data/Matrix/Diagonal.lean,Mathlib/Data/Set/Pairwise/Lattice.lean,Mathlib/Data/Set/Prod.lean,Mathlib/FieldTheory/Finite/Basic.lean,Mathlib/FieldTheory/Finite/Polynomial.lean,Mathlib/FieldTheory/SeparablyGenerated.lean,Mathlib/Geometry/Euclidean/Angle/Bisector.lean,Mathlib/GroupTheory/Perm/Cycle/Basic.lean,Mathlib/LinearAlgebra/Matrix/Permutation.lean,Mathlib/LinearAlgebra/Matrix/Stochastic.lean,Mathlib/Logic/Basic.lean,Mathlib/Logic/Function/Basic.lean,Mathlib/NumberTheory/LegendreSymbol/GaussEisensteinLemmas.lean,Mathlib/NumberTheory/Padics/RingHoms.lean,Mathlib/SetTheory/Cardinal/Aleph.lean,Mathlib/SetTheory/Cardinal/Order.lean,Mathlib/SetTheory/Ordinal/Notation.lean,Mathlib/Tactic/NormNum/Irrational.lean 33 16 ['Vierkantor', 'github-actions', 'leanprover-radar', 'mathlib-dependent-issues', 'mathlib-merge-conflicts'] nobody
8-78565
8 days ago
71-26981
71 days ago
0-1598
26 minutes
37553 grunweg
author:grunweg
 chore: golf using .ne and friends ne_of_gt -> .ne' ne_of_lt -> .ne le_of_lt -> .le Drive-by golfs using gcongr and positivity and been split into separate PRs. --- - [x] depends on: #37462 - [x] depends on: #37715 - [x] depends on: #37554 - [x] depends on: #37845 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict 302/321 Archive/Imo/Imo1981Q3.lean,Archive/Imo/Imo2011Q3.lean,Archive/Imo/Imo2013Q5.lean,Archive/Imo/Imo2019Q4.lean,Archive/Wiedijk100Theorems/CubingACube.lean,Counterexamples/DiscreteTopologyNonDiscreteUniformity.lean,Counterexamples/NowhereDifferentiable.lean,Counterexamples/TopologistsSineCurve.lean,Mathlib/Algebra/BigOperators/Fin.lean,Mathlib/Algebra/BigOperators/Group/List/Lemmas.lean,Mathlib/Algebra/CharP/Defs.lean,Mathlib/Algebra/Group/Fin/Basic.lean,Mathlib/Algebra/Group/Pointwise/Set/Finite.lean,Mathlib/Algebra/Lie/Nilpotent.lean,Mathlib/Algebra/Module/Torsion/Basic.lean,Mathlib/Algebra/Module/ZLattice/Basic.lean,Mathlib/Algebra/Module/ZLattice/Covolume.lean,Mathlib/Algebra/Order/Antidiag/Nat.lean,Mathlib/Algebra/Order/Archimedean/Basic.lean,Mathlib/Algebra/Order/Archimedean/Class.lean,Mathlib/Algebra/Order/BigOperators/Group/Multiset.lean,Mathlib/Algebra/Order/BigOperators/GroupWithZero/Finset.lean,Mathlib/Algebra/Order/CauSeq/Basic.lean,Mathlib/Algebra/Order/CauSeq/BigOperators.lean,Mathlib/Algebra/Order/CompleteField.lean,Mathlib/Algebra/Order/Field/Basic.lean,Mathlib/Algebra/Order/GroupWithZero/Range.lean,Mathlib/Algebra/Order/GroupWithZero/Unbundled/Basic.lean,Mathlib/Algebra/Order/Interval/Set/Instances.lean,Mathlib/Algebra/Order/Module/HahnEmbedding.lean,Mathlib/Algebra/Order/Ring/WithTop.lean,Mathlib/Algebra/Order/Round.lean,Mathlib/Algebra/Order/ToIntervalMod.lean,Mathlib/Algebra/Polynomial/DenomsClearable.lean,Mathlib/Algebra/Polynomial/EraseLead.lean,Mathlib/Algebra/Polynomial/Monic.lean,Mathlib/Algebra/QuadraticDiscriminant.lean,Mathlib/AlgebraicGeometry/ProjectiveSpectrum/Proper.lean,Mathlib/Analysis/Analytic/Composition.lean,Mathlib/Analysis/Analytic/Inverse.lean,Mathlib/Analysis/Analytic/OfScalars.lean,Mathlib/Analysis/Analytic/Uniqueness.lean,Mathlib/Analysis/Asymptotics/ExpGrowth.lean,Mathlib/Analysis/Asymptotics/LinearGrowth.lean,Mathlib/Analysis/Asymptotics/SpecificAsymptotics.lean,Mathlib/Analysis/Asymptotics/TVS.lean,Mathlib/Analysis/BoxIntegral/Basic.lean,Mathlib/Analysis/BoxIntegral/Partition/Tagged.lean,Mathlib/Analysis/Calculus/BumpFunction/FiniteDimension.lean,Mathlib/Analysis/Calculus/ContDiff/Defs.lean,Mathlib/Analysis/Calculus/ContDiff/FTaylorSeries.lean,Mathlib/Analysis/Calculus/DerivativeTest.lean,Mathlib/Analysis/Calculus/FDeriv/Extend.lean,Mathlib/Analysis/Calculus/FDeriv/Measurable.lean,Mathlib/Analysis/Calculus/IteratedDeriv/Defs.lean,Mathlib/Analysis/Calculus/LHopital.lean,Mathlib/Analysis/Complex/Exponential.lean,Mathlib/Analysis/Complex/Hadamard.lean,Mathlib/Analysis/Complex/OpenMapping.lean,Mathlib/Analysis/Complex/Poisson.lean,Mathlib/Analysis/Complex/Trigonometric.lean,Mathlib/Analysis/Convex/Between.lean,Mathlib/Analysis/Convex/Caratheodory.lean,Mathlib/Analysis/Convex/Combination.lean,Mathlib/Analysis/Convex/Gauge.lean,Mathlib/Analysis/Convex/Radon.lean,Mathlib/Analysis/Convex/SpecificFunctions/Deriv.lean,Mathlib/Analysis/Convolution.lean,Mathlib/Analysis/InnerProductSpace/Subspace.lean,Mathlib/Analysis/LocallyConvex/WithSeminorms.lean,Mathlib/Analysis/MeanInequalities.lean,Mathlib/Analysis/MeanInequalitiesPow.lean,Mathlib/Analysis/MellinInversion.lean,Mathlib/Analysis/MellinTransform.lean,Mathlib/Analysis/Normed/Field/Approximation.lean,Mathlib/Analysis/Normed/Module/FiniteDimension.lean,Mathlib/Analysis/Normed/Operator/ContinuousAlgEquiv.lean,Mathlib/Analysis/Normed/Ring/Units.lean,Mathlib/Analysis/Normed/Unbundled/IsPowMulFaithful.lean,Mathlib/Analysis/Normed/Unbundled/SmoothingSeminorm.lean,Mathlib/Analysis/Normed/Unbundled/SpectralNorm.lean,Mathlib/Analysis/Oscillation.lean,Mathlib/Analysis/Real/Hyperreal.lean,Mathlib/Analysis/Real/Pi/Bounds.lean,Mathlib/Analysis/SpecialFunctions/ContinuousFunctionalCalculus/Rpow/IntegralRepresentation.lean,Mathlib/Analysis/SpecialFunctions/Log/Basic.lean,Mathlib/Analysis/SpecialFunctions/PolarCoord.lean,Mathlib/Analysis/SpecialFunctions/Pow/NNReal.lean,Mathlib/Analysis/SpecialFunctions/Pow/Real.lean,Mathlib/Analysis/SpecialFunctions/Trigonometric/Basic.lean,Mathlib/Data/EReal/Inv.lean,Mathlib/Data/Finset/Image.lean,Mathlib/Data/Int/Interval.lean,Mathlib/Data/Int/ModEq.lean,Mathlib/Data/Nat/Bitwise.lean,Mathlib/Data/Nat/Lattice.lean,Mathlib/Data/Nat/Log.lean,Mathlib/Data/Nat/Multiplicity.lean,Mathlib/Data/Real/ConjExponents.lean,Mathlib/Dynamics/Circle/RotationNumber/TranslationNumber.lean 114 7 ['github-actions', 'mathlib-dependent-issues', 'mathlib-merge-conflicts'] nobody
8-78317
8 days ago
8-78317
8 days ago
13-66876
13 days
36698 ghseeli
author:ghseeli
 feat(Combinatorics/Enumerative): Latin squares This PR defines Latin rectangles and Latin squares and proves an extension theorem using Hall's Marriage Theorem. ## Main results - `group_to_cayley_table`: every finite group `G` yields a `LatinSquare G G`. - `latin_rectangle_extends_one_row`: a (non-square) `LatinRectangle` extends to a `LatinRectangle` with one more row. This is an application of **Hall's Marriage Theorem**, `hallMatchingsOn.nonempty`. - `latin_rectangle_extends_to_latin_square`: a `LatinRectangle` extends to a `LatinSquare`. This is included in a new file `Combinatorics/Enumerative/LatinSquare.lean`. --- - [ ] depends on: #37190 - [ ] depends on: #37720 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor t-combinatorics blocked-by-other-PR 638/0 Mathlib.lean,Mathlib/Combinatorics/Enumerative/DoubleCounting.lean,Mathlib/Combinatorics/Enumerative/LatinSquare.lean,Mathlib/Combinatorics/Pigeonhole.lean,Mathlib/Data/Fintype/Card.lean,docs/references.bib 6 78 ['SnirBroshi', 'cjrl', 'eric-wieser', 'ghseeli', 'github-actions', 'mathlib-dependent-issues', 'vlad902'] nobody
8-76987
8 days ago
49-13207
49 days ago
16-40743
16 days
38070 grunweg
author:grunweg
 feat: add informal attribute This allows tagging a definition or concept with an informal mathematics concept: the details are subject to discussion. The implementation largely parallels the stacks tags attribute. -------- This PR, if desired, should land in stages: pre-requisites to merge before include (in order): - fix comment typos in the stacks file - rename the file to DatabaseAttributes - add a module deprecation - then this PR, which should be relatively small Open question: can the parsers be shared better? [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-meta WIP file-removed merge-conflict 121/39 Mathlib.lean,Mathlib/Algebra/Ring/Defs.lean,Mathlib/CategoryTheory/Category/Basic.lean,Mathlib/Geometry/Manifold/IsManifold/Basic.lean,Mathlib/Tactic.lean,Mathlib/Tactic/DatabaseAttributes.lean,Mathlib/Topology/Irreducible.lean,Mathlib/Topology/JacobsonSpace.lean,Mathlib/Topology/Separation/Basic.lean,Mathlib/Topology/Separation/Regular.lean,Mathlib/Topology/Spectral/Hom.lean,MathlibTest/DatabaseAttributes.lean,scripts/noshake.json 13 11 ['JovanGerb', 'Vierkantor', 'github-actions', 'grunweg', 'mathlib-merge-conflicts', 'mattrobball'] nobody
8-74878
8 days ago
35-83397
35 days ago
0-45796
12 hours
38822 ldct
author:ldct
 feat(IntervalIntegrable): add `fun_prop` support Allow `fun_prop` to work on `IntervalIntegrable` goals --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-measure-probability awaiting-author merge-conflict 27/6 Archive/Wiedijk100Theorems/AreaOfACircle.lean,Mathlib/Analysis/Real/Pi/Irrational.lean,Mathlib/MeasureTheory/Integral/IntervalIntegral/Basic.lean,MathlibTest/fun_prop.lean 4 8 ['github-actions', 'grunweg', 'mathlib-merge-conflicts'] kex-y
assignee:kex-y
8-74873
8 days ago
19-22692
19 days ago
1-68245
1 day
39119 kbuzzard
author:kbuzzard
 perf(Algebra/*): fast_instance% for prio 100 instances --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) I got Claude code to put `fast_instance%` in front of every priority 100 type-valued instance in `Mathlib/Algebra`, just because this sort of thing is easy now. This broke a couple of files with typeclass inference failing to find instances on fields, so I reverted the changes in `Mathlib/Algebra/Field/Defs.lean` and now mathlib builds. WIP t-algebra merge-conflict
label:t-algebra$
 138/114 Mathlib/Algebra/Divisibility/Basic.lean,Mathlib/Algebra/EuclideanDomain/Field.lean,Mathlib/Algebra/GCDMonoid/Basic.lean,Mathlib/Algebra/Group/Basic.lean,Mathlib/Algebra/Group/Defs.lean,Mathlib/Algebra/GroupWithZero/Action/Defs.lean,Mathlib/Algebra/GroupWithZero/Basic.lean,Mathlib/Algebra/GroupWithZero/Units/Basic.lean,Mathlib/Algebra/Lie/OfAssociative.lean,Mathlib/Algebra/Lie/Semisimple/Basic.lean,Mathlib/Algebra/Module/Defs.lean,Mathlib/Algebra/Order/AddGroupWithTop.lean,Mathlib/Algebra/Order/Floor/Defs.lean,Mathlib/Algebra/Ring/Action/Basic.lean,Mathlib/Algebra/Ring/Action/Rat.lean,Mathlib/Algebra/Ring/Commute.lean,Mathlib/Algebra/Ring/Defs.lean,Mathlib/Algebra/Star/Basic.lean 18 7 ['github-actions', 'kbuzzard', 'leanprover-radar', 'mathlib-merge-conflicts'] nobody
8-74865
8 days ago
13-25947
13 days ago
0-1
1 second
39169 thorimur
author:thorimur
 bench: experiment --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) file-removed merge-conflict 428/456 Mathlib.lean,Mathlib/Algebra/Expr.lean,Mathlib/Algebra/Field/ModEq.lean,Mathlib/Algebra/Free.lean,Mathlib/Algebra/HierarchyDesign.lean,Mathlib/Analysis/CStarAlgebra/ContinuousFunctionalCalculus/Note.lean,Mathlib/Analysis/Convex/Slope.lean,Mathlib/Analysis/SpecialFunctions/Log/Deriv.lean,Mathlib/Analysis/SpecialFunctions/Stirling.lean,Mathlib/CategoryTheory/Abelian/Injective/Resolution.lean,Mathlib/CategoryTheory/Category/Init.lean,Mathlib/CategoryTheory/ConcreteCategory/Bundled.lean,Mathlib/Combinatorics/Matroid/Init.lean,Mathlib/Combinatorics/SimpleGraph/Init.lean,Mathlib/Computability/RegularExpressions.lean,Mathlib/Control/Combinators.lean,Mathlib/Control/Fold.lean,Mathlib/Control/Lawful.lean,Mathlib/Control/ULift.lean,Mathlib/Data/Array/Defs.lean,Mathlib/Data/Array/Extract.lean,Mathlib/Data/Bool/AllAny.lean,Mathlib/Data/Bracket.lean,Mathlib/Data/DFinsupp/WellFounded.lean,Mathlib/Data/Finset/Attr.lean,Mathlib/Data/Ineq.lean,Mathlib/Data/Int/DivMod.lean,Mathlib/Data/Int/Notation.lean,Mathlib/Data/List/Lookmap.lean,Mathlib/Data/List/ModifyLast.lean,Mathlib/Data/List/Monad.lean,Mathlib/Data/List/PeriodicityLemma.lean,Mathlib/Data/List/TFAE.lean,Mathlib/Data/Nat/BinaryRec.lean,Mathlib/Data/Nat/Bitwise.lean,Mathlib/Data/Nat/Notation.lean,Mathlib/Data/Nat/NthRoot/Defs.lean,Mathlib/Data/Option/Defs.lean,Mathlib/Data/Option/NAry.lean,Mathlib/Data/Ordering/Basic.lean,Mathlib/Data/Prod/PProd.lean,Mathlib/Data/Set/Defs.lean,Mathlib/Data/String/Defs.lean,Mathlib/Data/Subtype.lean,Mathlib/Data/Sym/Sym2/Init.lean,Mathlib/Data/UInt.lean,Mathlib/Deprecated/Aliases.lean,Mathlib/Geometry/Euclidean/Inversion/Basic.lean,Mathlib/Geometry/Euclidean/Inversion/Calculus.lean,Mathlib/Lean/CoreM.lean,Mathlib/Lean/Elab/Term.lean,Mathlib/Lean/EnvExtension.lean,Mathlib/Lean/Exception.lean,Mathlib/Lean/Expr.lean,Mathlib/Lean/Expr/Rat.lean,Mathlib/Lean/FoldEnvironment.lean,Mathlib/Lean/GoalsLocation.lean,Mathlib/Lean/Json.lean,Mathlib/Lean/LocalContext.lean,Mathlib/Lean/MessageData/ForExprs.lean,Mathlib/Lean/MessageData/Trace.lean,Mathlib/Lean/Meta.lean,Mathlib/Lean/Meta/Basic.lean,Mathlib/Lean/Meta/DiscrTree.lean,Mathlib/Lean/Meta/KAbstractPositions.lean,Mathlib/Lean/Meta/RefinedDiscrTree/Basic.lean,Mathlib/Lean/Meta/Simp.lean,Mathlib/Lean/Meta/Tactic/Rewrite.lean,Mathlib/Lean/Name.lean,Mathlib/Lean/PrettyPrinter/Delaborator.lean,Mathlib/Lean/Thunk.lean,Mathlib/LinearAlgebra/PiTensorProduct.lean,Mathlib/Logic/ExistsUnique.lean,Mathlib/Logic/Function/Coequalizer.lean,Mathlib/Logic/Function/CompTypeclasses.lean,Mathlib/Logic/Function/Defs.lean,Mathlib/Logic/Function/ULift.lean,Mathlib/Logic/IsEmpty/Defs.lean,Mathlib/Logic/Nonempty.lean,Mathlib/Logic/OpClass.lean,Mathlib/MeasureTheory/Covering/BesicovitchVectorSpace.lean,Mathlib/NumberTheory/ModularForms/SlashActions.lean,Mathlib/Order/Hom/Set.lean,Mathlib/Probability/Martingale/Upcrossing.lean,Mathlib/Probability/Process/HittingTime.lean,Mathlib/Tactic.lean,Mathlib/Tactic/ApplyAt.lean,Mathlib/Tactic/ApplyCongr.lean,Mathlib/Tactic/ApplyFun.lean,Mathlib/Tactic/ApplyWith.lean,Mathlib/Tactic/ArithMult/Init.lean,Mathlib/Tactic/Attr/Register.lean,Mathlib/Tactic/Basic.lean,Mathlib/Tactic/Bound/Init.lean,Mathlib/Tactic/Cases.lean,Mathlib/Tactic/CasesM.lean,Mathlib/Tactic/CategoryTheory/CategoryStar.lean,Mathlib/Tactic/CategoryTheory/Coherence/Datatypes.lean,Mathlib/Tactic/Change.lean,Mathlib/Tactic/Check.lean 314 4 ['github-actions', 'leanprover-radar', 'mathlib-merge-conflicts', 'thorimur'] nobody
8-74862
8 days ago
unknown
0-0
0 seconds
39194 grunweg
author:grunweg
 Sobolev wip #32305 on current master, hopefully --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) WIP awaiting-CI t-measure-probability merge-conflict 2116/9 Mathlib.lean,Mathlib/Analysis/Distribution/ContDiffMapSupportedIn.lean,Mathlib/Analysis/Distribution/Distribution.lean,Mathlib/Analysis/Distribution/TestFunction.lean,Mathlib/Analysis/Distribution/WeakDeriv.lean,Mathlib/Analysis/FunctionalSpaces/Sobolev/Basic.lean,Mathlib/MeasureTheory/Function/LocallyIntegrable.lean 7 2 ['github-actions', 'mathlib-merge-conflicts'] nobody
8-74861
8 days ago
unknown
0-0
0 seconds
39253 Paul-Lez
author:Paul-Lez
 feat(LinearAlgebra/Basis/HasCanonicalBasis): propose `HasCanonicalBasis` class This PR continues the work from #25425. Original PR: https://github.com/leanprover-community/mathlib4/pull/25425 104/0 Mathlib/LinearAlgebra/Basis/HasCanonicalBasis.lean 1 1 ['github-actions'] nobody
8-74856
8 days ago
unknown
0-0
0 seconds
37185 gasparattila
author:gasparattila
 chore(Data/Finset/Lattice/Fold): rename `comp_sup_*` to `apply_sup_*` These lemmas are of the form `g (s.sup f) = s.sup (g ∘ f)` with no composition on the LHS. --- - [x] depends on: #37047 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-order 44/26 Mathlib/Algebra/Order/Ring/Finset.lean,Mathlib/Analysis/CStarAlgebra/Basic.lean,Mathlib/Analysis/Normed/Group/Ultra.lean,Mathlib/Data/ENNReal/Lemmas.lean,Mathlib/Data/Finset/Lattice/Fold.lean,Mathlib/Data/Finset/Max.lean,Mathlib/Data/NNReal/Basic.lean,Mathlib/Order/PartialSups.lean,Mathlib/RingTheory/MvPolynomial/Symmetric/Defs.lean,Mathlib/Topology/ContinuousMap/CompactlySupported.lean,Mathlib/Topology/ContinuousMap/Ordered.lean 11 4 ['gasparattila', 'github-actions', 'mathlib-dependent-issues', 'mathlib-merge-conflicts'] bryangingechen
assignee:bryangingechen
8-74522
8 days ago
44-1988
44 days ago
44-2025
44 days
38816 tb65536
author:tb65536
 refactor(GroupTheory/Finiteness): make duplicate definitions into abbrevs The definitions `Submonoid.FG`, `Group.FG`, and `Subgroup.FG` are all equivalent to `Monoid.FG`, so I've made them into abbrevs. In the future we might even want to consider deprecating all but one to avoid having four ways to write the same thing. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra t-group-theory
label:t-algebra$
 140/122 Mathlib/Algebra/AffineMonoid/Irreducible.lean,Mathlib/GroupTheory/Finiteness.lean,Mathlib/GroupTheory/MonoidLocalization/Finite.lean,Mathlib/GroupTheory/Schreier.lean,Mathlib/ModelTheory/Arithmetic/Presburger/Semilinear/Basic.lean,Mathlib/ModelTheory/Arithmetic/Presburger/Semilinear/Defs.lean,Mathlib/RingTheory/FiniteType.lean,Mathlib/RingTheory/Finiteness/Defs.lean,Mathlib/RingTheory/Localization/InvSubmonoid.lean 9 5 ['eric-wieser', 'github-actions', 'j-loreaux', 'tb65536'] mattrobball
assignee:mattrobball
8-74518
8 days ago
21-11041
21 days ago
21-10753
21 days
38821 Jun2M
author:Jun2M
 feat(Data/List): rotation of sublist is sublist of rotation This PR proves `(∃ L₁ : List α, L ~r L₁ ∧ L₁ <+ L') ↔ (∃ L₂ : List α, L <+ L₂ ∧ L₂ ~r L')`. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-data 10/0 Mathlib/Data/List/Rotate.lean 1 3 ['SnirBroshi', 'eric-wieser', 'github-actions'] joneugster
assignee:joneugster
8-74518
8 days ago
21-7704
21 days ago
21-7415
21 days
39341 drocta
author:drocta
 feat(Algebra/Colimit/DirectLimit): add DirectLimit.(NonUnital)StarAlgebra.(lift/of) maps and associated lemmas add the `of` and `lift` maps for `DirectLimit.StarAlgebra` and `DirectLimit.NonUnitalStarAlgebra`, as well as the associated lemmas, `of_f`, `lift_comp_of`, `lift_of`, and `hom_ext` for each. Also make `DirectLimit.NonUnitalAlgebra` only require `[Monoid R]` rather than `[CommSemiring R]`. --- Use of AI: I again asked ChatGPT for some advice about some things about this code. I can personally vouch for all of the code I'm submitting, and that I understand all of it. This is the third part of my project towards supporting direct limits of $C^∗$ -algebras (as I described [on Zulip](https://leanprover.zulipchat.com/#narrow/channel/113489-new-members/topic/Early.20feedback.20on.20approach.20towards.20formalizing.20UHF.20algebras.3F) ). This PR adds an import of `Mathlib.Algebra.Star.StarAlgHom` (because it needs `StarAlgHom` and `NonUnitalStarAlgHom`) replacing/encompassing the previously added imports of `Mathlib.Algebra.Star.StarRingHom` and `Mathlib.Algebra.Algebra.NonUnitalHom` (added in PR #38308 and #38672 respectively). t-algebra new-contributor
label:t-algebra$
 100/3 Mathlib/Algebra/Colimit/DirectLimit.lean 1 2 ['github-actions'] nobody
8-73929
8 days ago
8-76621
8 days ago
8-76332
8 days
39347 Sfgangloff
author:Sfgangloff
 feat(SymbolicDynamics): refactor of Pattern and shift-invariance of shape languages for subshifts ## Summary This PR refactors Pattern.mulShift in Mathlib/Dynamics/SymbolicDynamics/Basic.lean and uses the cleaner definition to prove shift-invariance of the language of a subshift on a finite shape. ## Changes Pattern.mulShift now returns a Pattern instead of a configuration (more natural). - Old type: Pattern.mulShift : Pattern A G → G → (G → A) - New type: Pattern.mulShift : Pattern A G → G → Pattern A G - The result carries its support (p.support.image (v * ·)) and the default-outside-support proof, so callers don't have to re-derive them. The [IsLeftCancelMul G] hypothesis is moved to the lemmas that actually use it. - The definition Pattern.mulShift itself no longer needs left-cancellation (it only chooses a preimage noncomputably). - The hypothesis is now stated on mulShift_config_apply_mul_left_of_mem and mulOccursInAt_eq_cylinder directly, instead of being a section-level variable. Renames following the type change. - mulShift_apply_mul_left_of_mem → mulShift_config_apply_mul_left_of_mem (because we now write (p.mulShift v).config instead of p.mulShift v). New @[simp] and @[ext] lemmas for Pattern. - Pattern.ext: two patterns are equal iff their supports agree and their configurations agree on the support. - Pattern.mulShift_support: the support of p.mulShift v is p.support.image (v * ·). - Pattern.fromConfig_support: the support of fromConfig x U is U. - Pattern.fromConfig_config_of_mem: on its support, fromConfig x U agrees with x. New lemma Pattern.fromConfig_mulShift. For a left inverse g' * g = 1, shifting the pattern fromConfig x U by g equals fromConfig (mulShift g' x) (U.image (g * ·)). New theorem MulSubshift.languageOn_image_mulShift. For a subshift Y and elements g, g' with g * g' = 1 and g' * g = 1: (fun p => p.mulShift g) '' Y.languageOn U = Y.languageOn (U.image (g * ·)) i.e. the language on the translated shape is exactly the image of the language on U under the pattern-shift map. This gives a bijection between Y.languageOn U and Y.languageOn (U.image (g * ·)), with inverse p ↦ p.mulShift g'. Stated for left-cancellative monoids with an invertible element. Updated docstrings for Pattern.mulShift and the renamed lemma to reflect the bundled-Pattern return type and clarify which results need [IsLeftCancelMul G]. t-dynamics new-contributor 142/48 Mathlib/Dynamics/SymbolicDynamics/Basic.lean 1 3 ['github-actions'] nobody
8-69329
8 days ago
8-69490
8 days ago
8-69201
8 days
36743 Jun2M
author:Jun2M
 feat(Combinatorics/GraphLike): introduce `GraphLike` typeclass Per discussion at ([#graph theory > HasAdj](https://leanprover.zulipchat.com/#narrow/channel/252551-graph-theory/topic/HasAdj/with/575843445)), This PR introduces the `GraphLike` typeclass to capture the notions like `dart` and `walk` across various graph objects, such as `SimpleGraph`, `Graph`, and `Digraph`. The goal is that by abstracting these core components into a typeclass, we can prove these results once for all graph-like structures rather than duplicating them across different graph types. ### Main definitions * `GraphLike V D E Gr`: A typeclass parameterized by a vertex type `V`, dart type `D` and a graph type `Gr` (with `V`, `D` & `E` as an `outParam`). * `GraphLike.verts : Set V`: The set of vertices of the graph. * `GraphLike.darts : Set D`: The set of darts of the graph. * `GraphLike.edges : Set E`: The set of edges of the graph. * `GraphLike.Adj : V → V → Prop`: The adjacency relation, defined by default as `∃ d ∈ darts, fst d = u ∧ snd d = v`. --- This PR generalises #35776 to also unify `Graph`. PRs depending on this PR are #39047 (graphLike with no multi edges) => #39050 (Digraph is graphLike) || V #36829 (undirected graphLike) => #39053 (Graph is graphLike) & #39054 (Simplegraph is graphLike) || V #36756 (def of walk on GraphLike) => #36971 (change Simplegraph to use GraphLike walk) [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-combinatorics 104/0 Mathlib.lean,Mathlib/Combinatorics/GraphLike/Basic.lean 2 78 ['IvanRenison', 'Jun2M', 'SnirBroshi', 'YaelDillies', 'github-actions', 'lauramonk', 'mathlib-merge-conflicts'] YaelDillies
assignee:YaelDillies
8-63039
8 days ago
14-20191
14 days ago
65-18318
65 days
39352 qawbecrdtey
author:qawbecrdtey
 chore(Data/Finset/Slice): remove unnecessary import --- Remove import which was transitively being imported. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-data easy 0/1 Mathlib/Data/Finset/Slice.lean 1 1 ['github-actions'] nobody
8-55416
8 days ago
8-55410
8 days ago
8-55246
8 days
27897 grunweg
author:grunweg
 feat: check indentation of doc-strings Likely will require further adaptations to mathlib. May land piece-wise. But at first, let's see how big the overall fallout actually is. (So far: 100 lines of implementation and tests, and 170 lines of fix-ups; which are probably mostly complete, but not entirely.) --- - [x] depends on: #27898 - [x] depends on: #39245 - [x] depends on: #39246 - [x] depends on: #39247 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-linter awaiting-CI awaiting-author 363/81 Mathlib/Algebra/ContinuedFractions/Basic.lean,Mathlib/Algebra/Lie/Classical.lean,Mathlib/Algebra/Lie/OfAssociative.lean,Mathlib/Algebra/SkewMonoidAlgebra/Lift.lean,Mathlib/Analysis/Calculus/ParametricIntegral.lean,Mathlib/CategoryTheory/Filtered/Basic.lean,Mathlib/CategoryTheory/Monoidal/Functor.lean,Mathlib/CategoryTheory/Monoidal/Limits/Basic.lean,Mathlib/CategoryTheory/NatIso.lean,Mathlib/CategoryTheory/Presentable/IsCardinalFiltered.lean,Mathlib/CategoryTheory/Presentable/OrthogonalReflection.lean,Mathlib/Combinatorics/SimpleGraph/FiveWheelLike.lean,Mathlib/Data/List/Defs.lean,Mathlib/Data/Num/Basic.lean,Mathlib/Data/Num/Bitwise.lean,Mathlib/Dynamics/BirkhoffSum/QuasiMeasurePreserving.lean,Mathlib/Geometry/Euclidean/Simplex.lean,Mathlib/Geometry/Manifold/LocalDiffeomorph.lean,Mathlib/Geometry/RingedSpace/PresheafedSpace/Gluing.lean,Mathlib/Lean/Meta/RefinedDiscrTree/Lookup.lean,Mathlib/LinearAlgebra/AffineSpace/Simplex/Centroid.lean,Mathlib/MeasureTheory/Function/ConvergenceInDistribution.lean,Mathlib/MeasureTheory/Function/ConvergenceInMeasure.lean,Mathlib/MeasureTheory/Group/Action.lean,Mathlib/Probability/Kernel/Deterministic.lean,Mathlib/RepresentationTheory/Invariants.lean,Mathlib/RingTheory/DividedPowers/SubDPIdeal.lean,Mathlib/RingTheory/MvPowerSeries/Basic.lean,Mathlib/RingTheory/PowerSeries/Basic.lean,Mathlib/Tactic/Algebra/Basic.lean,Mathlib/Tactic/ComputeDegree.lean,Mathlib/Tactic/FunProp/Core.lean,Mathlib/Tactic/Linter/DocString.lean,Mathlib/Tactic/MinImports.lean,Mathlib/Tactic/MoveAdd.lean,Mathlib/Topology/Covering/Basic.lean,Mathlib/Topology/EMetricSpace/PairReduction.lean,MathlibTest/DocStringLinter.lean 38 13 ['github-actions', 'grunweg', 'joneugster', 'mathlib-bors', 'mathlib-dependent-issues', 'mathlib4-merge-conflict-bot'] nobody
8-48411
8 days ago
292-36845
292 days ago
0-1
1 second
38472 Raph-DG
author:Raph-DG
 feat(AlgebraicGeometry): The Weil divisor associated to an element of the function field on a locally Noetherian integral scheme In this PR we define and provide some basic API for principal Weil divisors, i.e. the Weil divisor associated to an element of the function field of a locally noetherian, integral scheme. - [ ] depends on: #29774 - [ ] depends on: #37985 - [ ] depends on: #37901 - [ ] depends on: #38002 --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) large-import blocked-by-other-PR 713/0 Mathlib.lean,Mathlib/AlgebraicGeometry/AlgebraicCycle/Basic.lean,Mathlib/AlgebraicGeometry/AlgebraicCycle/Principal.lean,Mathlib/AlgebraicGeometry/FunctionField.lean,Mathlib/AlgebraicGeometry/OrderOfVanishing.lean,Mathlib/Order/Hom/Basic.lean,Mathlib/Order/KrullDimension.lean,Mathlib/Order/Minimal.lean,Mathlib/Topology/Inseparable.lean,Mathlib/Topology/LocallyFinsupp/Pushforward.lean,Mathlib/Topology/Sober.lean 11 3 ['github-actions', 'mathlib-dependent-issues', 'mathlib-merge-conflicts'] nobody
8-46179
8 days ago
28-22929
28 days ago
0-1194
19 minutes
39288 FordUniver
author:FordUniver
 feat(Combinatorics/SimpleGraph/Subgraph): add `Embedding.ofIsInduced` and `IsInduced.map` Three additions to the `SimpleGraph.Subgraph` API for induced subgraphs. `Embedding.ofIsInduced` is the canonical embedding of an induced subgraph into its ambient graph, paired with `toHom_ofIsInduced` and `ofIsInduced_apply` lemmas. This is the embedding counterpart of `Subgraph.hom`, which only produces a homomorphism because non-induced subgraphs do not reflect adjacency. `Subgraph.IsInduced.map` then records that the image of an induced subgraph under a graph embedding is induced, strengthened to `IsInduced.map_iff` for the iso case. --- **Orthogonal pre-requisite of the `Copy` / `InducedCopy` refactor-feat stack.** Extracted as a prerequisite from #38631 that is otherwise independent of the wider `Copy` / `InducedCopy` refactor-feat stack. t-combinatorics 27/4 Mathlib/Combinatorics/SimpleGraph/Copy.lean,Mathlib/Combinatorics/SimpleGraph/Subgraph.lean 2 15 ['FordUniver', 'SnirBroshi', 'github-actions', 'mathlib-bors'] nobody
8-43585
8 days ago
9-22295
9 days ago
9-43570
9 days
38966 smmercuri
author:smmercuri
 chore(Algebra): `coe_ringHom` -> `coe_toRingHom` --- - [ ] depends on: #38950 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) blocked-by-other-PR 197/120 Mathlib/Algebra/Algebra/Equiv.lean,Mathlib/Algebra/Algebra/Hom.lean,Mathlib/Algebra/Algebra/Spectrum/Basic.lean,Mathlib/Algebra/Algebra/Subalgebra/Centralizer.lean,Mathlib/Algebra/Azumaya/Basic.lean,Mathlib/Algebra/MvPolynomial/Basic.lean,Mathlib/Algebra/MvPolynomial/Equiv.lean,Mathlib/Algebra/MvPolynomial/Eval.lean,Mathlib/Algebra/Order/Hom/Ring.lean,Mathlib/Algebra/Polynomial/AlgebraMap.lean,Mathlib/Algebra/Ring/Equiv.lean,Mathlib/AlgebraicGeometry/AffineSpace.lean,Mathlib/AlgebraicGeometry/Spec.lean,Mathlib/Analysis/CStarAlgebra/GelfandDuality.lean,Mathlib/Data/ZMod/Basic.lean,Mathlib/FieldTheory/Extension.lean,Mathlib/FieldTheory/Galois/Basic.lean,Mathlib/FieldTheory/IsAlgClosed/Basic.lean,Mathlib/FieldTheory/Isaacs.lean,Mathlib/FieldTheory/KummerExtension.lean,Mathlib/FieldTheory/LinearDisjoint.lean,Mathlib/FieldTheory/Minpoly/Field.lean,Mathlib/FieldTheory/PurelyInseparable/Basic.lean,Mathlib/FieldTheory/SeparableDegree.lean,Mathlib/FieldTheory/SeparablyGenerated.lean,Mathlib/LinearAlgebra/Charpoly/Basic.lean,Mathlib/LinearAlgebra/TensorProduct/Subalgebra.lean,Mathlib/NumberTheory/Cyclotomic/CyclotomicCharacter.lean,Mathlib/NumberTheory/Cyclotomic/Gal.lean,Mathlib/NumberTheory/NumberField/CMField.lean,Mathlib/NumberTheory/NumberField/Ideal/KummerDedekind.lean,Mathlib/NumberTheory/NumberField/InfinitePlace/Ramification.lean,Mathlib/RingTheory/AdjoinRoot.lean,Mathlib/RingTheory/Algebraic/MvPolynomial.lean,Mathlib/RingTheory/Bialgebra/Equiv.lean,Mathlib/RingTheory/Bialgebra/Hom.lean,Mathlib/RingTheory/DedekindDomain/Different.lean,Mathlib/RingTheory/DedekindDomain/Instances.lean,Mathlib/RingTheory/DividedPowerAlgebra/Init.lean,Mathlib/RingTheory/Extension/Presentation/Basic.lean,Mathlib/RingTheory/Extension/Presentation/Core.lean,Mathlib/RingTheory/FinitePresentation.lean,Mathlib/RingTheory/FractionalIdeal/Operations.lean,Mathlib/RingTheory/GradedAlgebra/AlgHom.lean,Mathlib/RingTheory/GradedAlgebra/RingHom.lean,Mathlib/RingTheory/GradedAlgebra/TensorProduct.lean,Mathlib/RingTheory/Ideal/Quotient/Operations.lean,Mathlib/RingTheory/IntegralClosure/IntegralRestrict.lean,Mathlib/RingTheory/Jacobson/Ring.lean,Mathlib/RingTheory/LocalRing/ResidueField/Ideal.lean,Mathlib/RingTheory/LocalRing/ResidueField/Polynomial.lean,Mathlib/RingTheory/Localization/Basic.lean,Mathlib/RingTheory/Localization/FractionRing.lean,Mathlib/RingTheory/MvPolynomial/Symmetric/FundamentalTheorem.lean,Mathlib/RingTheory/NoetherNormalization.lean,Mathlib/RingTheory/Polynomial/Cyclotomic/Factorization.lean,Mathlib/RingTheory/RingHom/StandardSmooth.lean,Mathlib/RingTheory/RingInvo.lean,Mathlib/RingTheory/Smooth/Basic.lean,Mathlib/RingTheory/Smooth/IntegralClosure.lean,Mathlib/RingTheory/TensorProduct/Maps.lean,Mathlib/RingTheory/Trace/Quotient.lean,Mathlib/RingTheory/Unramified/Basic.lean 63 3 ['github-actions', 'mathlib-dependent-issues', 'mathlib-merge-conflicts'] nobody
8-33629
8 days ago
17-19809
17 days ago
0-4608
1 hour
38507 grunweg
author:grunweg
 fix(Linter/PrivateModule): only suggest @[expose] if the module has any definitions --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-meta awaiting-author 9/5 Mathlib/CategoryTheory/MarkovCategory/Positive.lean,Mathlib/Tactic/Linter/PrivateModule.lean,MathlibTest/PrivateModuleLinter/reservedName2.lean 3 9 ['JovanGerb', 'github-actions', 'grunweg', 'joneugster', 'leanprover-radar'] JovanGerb
assignee:JovanGerb
8-32394
8 days ago
8-32394
8 days ago
1-80663
1 day
36806 grunweg
author:grunweg
 fix(Tactic/Continuity): mark Continuous.comp' as unsafe This issue was pre-existing: `Continuous.comp'` was never full safe, as a constant function could be written as the composition of any function and a constant function (and then applying the lemma could lead to something unprovable). The change in #31607 triggered such a case: make is an unsafe rule with very high probability instead. This change broke three proofs: one was easy to switch to fun_prop; the others seemed to depend on this being a safe rule. I have added a workaround for now. There was another test failure, exposing a pre-existing internal bug in aesop. With smaller imports, continuity succeeds [zulip discussion](https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/aesop.20error.20during.20proof.20reconstruction.2C.20goal.20not.20normalised/with/580202602), so I have accepted this result as fine. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-meta awaiting-author 54/2 Mathlib/Analysis/RCLike/Basic.lean,Mathlib/Condensed/Light/TopCatAdjunction.lean,Mathlib/Condensed/TopCatAdjunction.lean,Mathlib/Topology/Continuous.lean,MathlibTest/Continuity.lean 5 4 ['github-actions', 'joneugster'] joneugster
assignee:joneugster
8-31863
8 days ago
8-31863
8 days ago
56-81666
56 days
39064 kim-em
author:kim-em
 feat: make showLinter detect tactics that assign metavariables This PR removes a short-circuit in `showLinter` that suppressed the linter whenever the syntactic goal was unchanged by a `show` tactic. A `show` invocation can still have side-effects on the metavariable context — tactic elaboration may assign metavariables while leaving the goal type unchanged — so the existing `instantiateMVars`-based diff check should run unconditionally. The fast path for the genuine no-op case is preserved: if `before` and `after` types still match after `instantiateMVars`, the linter doesn't fire. This was discovered while adapting Mathlib to nightly-2026-05-03 in https://github.com/leanprover-community/mathlib4-nightly-testing/pull/215 and is being extracted here so it can land independently of that bump. 🤖 Prepared with Claude Code t-linter delegated 1/1 Mathlib/Tactic/Linter/Style.lean 1 3 ['adomani', 'github-actions', 'joneugster', 'mathlib-bors'] thorimur
assignee:thorimur
8-31443
8 days ago
8-31444
8 days ago
6-25575
6 days
39259 jcommelin
author:jcommelin
 chore(Tactic/StacksAttribute): add deprecated module This PR adds `Tactic/StacksAttribute.lean` back as deprecated_module. --- - [x] depends on: #39257, where the file is removed [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) delegated auto-merge-after-CI 7/0 Mathlib.lean,Mathlib/Tactic.lean,Mathlib/Tactic/StacksAttribute.lean 3 5 ['adomani', 'github-actions', 'mathlib-bors', 'mathlib-dependent-issues'] adomani
assignee:adomani
8-31066
8 days ago
10-21666
10 days ago
0-3182
53 minutes
38199 vihdzp
author:vihdzp
 chore: add items to set theory overview --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) documentation t-set-theory maintainer-merge 11/2 docs/overview.yaml 1 5 ['SnirBroshi', 'github-actions', 'joneugster', 'vihdzp'] alreadydone
assignee:alreadydone
8-29968
8 days ago
34-48744
34 days ago
34-48554
34 days
37666 TJHeeringa
author:TJHeeringa
 feat(Analysis/InnerProductSpace/Reproducing): Lipschitz wrt the kernel pseudometric --- RKHSs $H$ have bounded point evaluations. This induces a pseudometric on the underlying space `X`. The function $f\in H$ are Lipschitz continuous with Lipschitz constant $\||f\||$. This PR puts the pseudometric instance inline. The instance cannot just be put outside the theorem, because that gives problems with resolving type classes / instance synthesis. An alternative to inlining the instance is a type class synonym. One copy would be the RKHS with whatever metric X came equipped with and one copy would be the RKHS with the induced metric. Since there are likely more theorems depending on this pseudometric, I suspect that it is actually a better solution. AI: I had the instance outside the theorem. Lean gave problems with resolving type classes / instance synthesis. I asked Claude and ChatGPT to interpret the error and fix it. The latter just spit gibberish and the former suggested inlining but in a way that didn't work. Then, I asked on Zulip and got the same suggestion but working. The type synonym alternative was also suggested there. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-analysis new-contributor help-wanted 71/6 Mathlib/Analysis/InnerProductSpace/Reproducing.lean 1 3 ['TJHeeringa', 'github-actions'] nobody
8-29182
8 days ago
unknown
0-0
0 seconds
38380 linesthatinterlace
author:linesthatinterlace
 feat(Data/Set): add Set.diag API Introduces `Set.diag (s : Set α) : Set (α × α) = {(a, a) | a ∈ s}` as the set-level companion to `Set.offDiag`, mirroring the existing `Finset.diag` / `Finset.offDiag` pairing. The type-level `Set.diagonal : Type* → Set (α × α)` is retained unchanged; `diag_univ : (univ : Set α).diag = diagonal α` (`@[simp]`) keeps it canonical when the underlying set is `univ`. Parallels to the existing `offDiag` API (`diag_mono`, `diag_nonempty`, `diag_eq_empty`, `diag_empty`, `diag_singleton`, `diag_subset_prod`, `diag_eq_sep_prod`, `diag_inter`, `diag_union`, `diag_insert`) plus bridges `diag_union_offDiag`, `disjoint_diag_offDiag`, `prod_sdiff_diag`, `prod_sdiff_offDiag`. Also `diag_eq_image`, `image_diag` (matching `Finset.image_diag`), `preimage_coe_coe_diag`, and `Finset.coe_diag`. Note `diag_union` and `diag_insert` are unconditional (no `Disjoint` / `a ∉ s` hypothesis). To free the `diag_` prefix for the set sense, the existing lemmas about the diagonal *map* `fun x => (x, x)` are renamed with deprecation aliases: `range_diag` → `range_diagMap`, `diag_preimage_prod` → `diagMap_preimage_prod`, `diag_preimage_prod_self` → `diagMap_preimage_prod_self`. `diag_image` and `preimage_coe_coe_diagonal` are marked `@[deprecated]`. This PR was prepared with the assistance of Claude Opus. t-data LLM-generated 124/15 Mathlib/Data/Finset/Prod.lean,Mathlib/Data/Set/Operations.lean,Mathlib/Data/Set/Prod.lean,Mathlib/MeasureTheory/MeasurableSpace/Constructions.lean,Mathlib/Topology/Compactness/Compact.lean,Mathlib/Topology/Compactness/Lindelof.lean,Mathlib/Topology/NhdsSet.lean 7 2 ['github-actions', 'linesthatinterlace'] joneugster
assignee:joneugster
8-26487
8 days ago
30-5900
30 days ago
30-5611
30 days
36155 grunweg
author:grunweg
 feat: custom elaborators for TangentSpace and tangentMap(Within) And use these to golf the differential geometry files a bit further. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-differential-geometry t-meta awaiting-author 85/30 Mathlib/Geometry/Manifold/ContMDiffMFDeriv.lean,Mathlib/Geometry/Manifold/GroupLieAlgebra.lean,Mathlib/Geometry/Manifold/IntegralCurve/Basic.lean,Mathlib/Geometry/Manifold/MFDeriv/SpecificFunctions.lean,Mathlib/Geometry/Manifold/MFDeriv/Tangent.lean,Mathlib/Geometry/Manifold/Notation.lean,Mathlib/Topology/FiberBundle/Constructions.lean,MathlibTest/DifferentialGeometry/Notation/Basic.lean 8 7 ['JovanGerb', 'github-actions', 'grunweg', 'mathlib-merge-conflicts', 'ocfnash'] JovanGerb
assignee:JovanGerb
8-26158
8 days ago
8-26158
8 days ago
69-16913
69 days
38983 kebekus
author:kebekus
 feat: Invariance of `meromorphic in normal form` under composition. Establish invariance of `meromorphic in normal form` under composition with analytic functions of non-vanishing derivative. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-analysis maintainer-merge 42/0 Mathlib/Analysis/Meromorphic/NormalForm.lean 1 12 ['github-actions', 'kebekus', 'themathqueen'] themathqueen
assignee:themathqueen
8-23920
8 days ago
8-23920
8 days ago
15-44630
15 days
37413 Paul-Lez
author:Paul-Lez
 feat(Combinatorics/Enumerative/Composition): add lemma about products of embeddings Co-authored-by: Xavier Genereux [xaviergenereux@hotmail.com](mailto:xaviergenereux@hotmail.com) --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-combinatorics 4/0 Mathlib/Combinatorics/Enumerative/Composition.lean 1 3 ['github-actions', 'robin-carlier'] nobody
8-23390
8 days ago
9-21164
9 days ago
19-49823
19 days
39003 TwoFX
author:TwoFX
 chore: avoid declaring duplicate instances `LE String` and `LT String` Since forever, mathlib has declared `LE String` and `LT String` instances which are propositionally, but not definitionally, equal to the `LE String` and `LT String` instances that have shipped with core. This regularly leads to problems with automation that expects instances to be canonical, most recently as described in leanprover/lean4#13544. This PR demotes the mathlib instances to definitions, and redefines the `LinearOrder String` instance to use the core-provided instances rather than the ones defined in mathlib. It also redeclares the theorems `String.lt_iff_toList_lt` and `String.le_iff_toList_le` to be about the core-provided instances rather than the mathlib ones, and the theorems about the mathlib instances are now called `String.lt_iff_toList_lt'` and `String.le_iff_toList_le'`. Deprecating the material related to the mathlib instances would be a logical next step, but it might make sense to wait with this until core ships more API for `LE String` and `LT String` (right now it ships none). --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-data awaiting-author 31/14 Mathlib/Data/String/Basic.lean 1 8 ['TwoFX', 'eric-wieser', 'github-actions', 'joneugster'] joneugster
assignee:joneugster
8-23175
8 days ago
8-25039
8 days ago
7-32948
7 days
38347 artie2000
author:artie2000
 doc(LinearAlgebra/FreeModule/StrongRankCondition): clarify context of `commRing_strongRankCondition` * Replace mathematical documentation in `Mathlib.LinearAlgebra.FreeModule.StrongRankCondition`, with explanation that the file comprises a shortcut instance `commRing_strongRankCondition` * Signpost `commRing_strongRankCondition` at both its parent instances * Increase priority of shortcut instance `commRing_strongRankCondition` above that of its parent instances --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-ring-theory awaiting-author 28/41 Mathlib/LinearAlgebra/FreeModule/StrongRankCondition.lean,Mathlib/LinearAlgebra/InvariantBasisNumber.lean,Mathlib/RingTheory/FiniteType.lean 3 3 ['github-actions', 'joneugster', 'mathlib-merge-conflicts'] joneugster
assignee:joneugster
8-21074
8 days ago
8-21074
8 days ago
22-40813
22 days
39372 yuanyi-350
author:yuanyi-350
 refactor(NumberTheory): golf `Mathlib/NumberTheory/ModularForms/EisensteinSeries/MDifferentiable` - rewrites `eisensteinSeriesSIF_mdifferentiable` to use `UpperHalfPlane.mdifferentiable_iff` directly and conclude from local uniform convergence of the Eisenstein series Extracted from #38144 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) codex LLM-generated 1/5 Mathlib/NumberTheory/ModularForms/EisensteinSeries/MDifferentiable.lean 1 3 ['github-actions', 'yuanyi-350'] nobody
8-20604
8 days ago
8-22338
8 days ago
8-22049
8 days
39373 yuanyi-350
author:yuanyi-350
 refactor(NumberTheory): golf `Mathlib/NumberTheory/ModularForms/CongruenceSubgroups` - simplifies `Gamma_mem` to a single `simp` proof via `Gamma_mem'` and `SpecialLinearGroup.ext_iff` - shortens `ModularGroup_T_pow_mem_Gamma` and the `Gamma0` closure proofs with direct `simp`/`simpa` arguments Extracted from #38144 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) codex LLM-generated 4/22 Mathlib/NumberTheory/ModularForms/CongruenceSubgroups.lean 1 2 ['github-actions', 'yuanyi-350'] nobody
8-20603
8 days ago
8-22336
8 days ago
8-22047
8 days
33985 YellPika
author:YellPika
 feat(Order/OmegaCompletePartialOrder): `OmegaCompletePartialOrder` instance for `Sum` with basic `ωScottContinuous` lemmas This PR adds an `OmegaCompletePartialOrder` instance for `Sum`, along with `ωScottContinuous` lemmas for basic operations (`inl`, `inr`, `elim`). Appropriate lemmas are marked with `@[fun_prop]` so that the `fun_prop` tactic can automatically deduce `ωScottContinuous` proofs for functions involving `Sum`s (e.g. see the proof of `Sum.ωScottContinuous_map`). --- - [x] depends on: #33941 - [x] depends on: #37258 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor large-import t-order awaiting-author 205/3 Mathlib/Data/Sum/Basic.lean,Mathlib/Data/Sum/Order.lean,Mathlib/Order/OmegaCompletePartialOrder.lean,Mathlib/Order/ScottContinuity.lean,Mathlib/Topology/Constructions/SumProd.lean 5 58 ['Komyyy', 'Vierkantor', 'YaelDillies', 'YellPika', 'github-actions', 'mathlib-dependent-issues', 'mathlib-merge-conflicts', 'vihdzp'] YaelDillies and pechersky
assignee:pechersky assignee:YaelDillies
8-20511
8 days ago
49-26321
49 days ago
52-59724
52 days
39374 yuanyi-350
author:yuanyi-350
 refactor(NumberTheory): golf `Mathlib/NumberTheory/ModularForms/Derivative` - rewrites `normalizedDerivOfComplex_sub` to reuse the additive and negation lemmas instead of reproving the subtraction formula pointwise Extracted from #38144 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) codex LLM-generated 4/10 Mathlib/NumberTheory/ModularForms/Derivative.lean 1 2 ['github-actions', 'yuanyi-350'] nobody
8-20397
8 days ago
8-22333
8 days ago
8-22044
8 days
39375 yuanyi-350
author:yuanyi-350
 refactor(NumberTheory): golf `Mathlib/NumberTheory/ModularForms/SlashActions` - streamlines `prod_slash_sum_weights` by letting `simp` handle the empty case and removing the redundant singleton split in the inductive step Extracted from #38144 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) codex LLM-generated 1/5 Mathlib/NumberTheory/ModularForms/SlashActions.lean 1 2 ['github-actions', 'yuanyi-350'] nobody
8-20240
8 days ago
8-22330
8 days ago
8-22041
8 days
39353 Raph-DG
author:Raph-DG
 feat(Topology): Show existence of a neighbourhood around p which avoids all points in the support of a locally finsupp function except those which specialize to p In this PR we show a simple lemma proving the existence of a neighbourhood around any point p which avoids every point in the support of a locally finsupp function except those which specialize to p. AI disclosure: The statements and a sketch with sorries were provided by me, but I had claude fill in the sorries. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-topology WIP 29/0 Mathlib/Topology/LocallyFinsupp.lean 1 1 ['github-actions'] nobody
8-20159
8 days ago
8-20171
8 days ago
0-31335
8 hours
39376 yuanyi-350
author:yuanyi-350
 refactor(NumberTheory): golf `Mathlib/NumberTheory/RamificationInertia/Basic` - shortens `quotientToQuotientRangePowQuotSucc_surjective` by switching the ideal-factor argument to `irreducible_pow_sup` and `count_normalizedFactors_eq` after isolating the span hypotheses Extracted from #38144 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) codex LLM-generated 4/10 Mathlib/NumberTheory/RamificationInertia/Basic.lean 1 2 ['github-actions', 'yuanyi-350'] nobody
8-20068
8 days ago
8-22328
8 days ago
8-22039
8 days
39379 yuanyi-350
author:yuanyi-350
 refactor(NumberTheory): golf `Mathlib/NumberTheory/SmoothNumbers` - simplifies the left inverse in `equivProdNatFactoredNumbers` by proving `¬ p ∣ m` once and then using `factorization_pow_self` and `factorization_eq_zero_of_not_dvd` Extracted from #38144 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) codex LLM-generated 4/8 Mathlib/NumberTheory/SmoothNumbers.lean 1 2 ['github-actions', 'yuanyi-350'] nobody
8-19414
8 days ago
8-22320
8 days ago
8-22031
8 days
39377 yuanyi-350
author:yuanyi-350
 refactor(NumberTheory): golf `Mathlib/NumberTheory/Divisors` - refactors `properDivisors_eq_singleton_one_iff_prime`, `mem_properDivisors_prime_pow`, and `properDivisors_prime_pow` to use more direct divisor lemmas - rewrites `image_div_divisors_eq_divisors` via `map_div_left_divisors` and `image_fst_divisorsAntidiagonal` Extracted from #38144 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) codex LLM-generated 17/42 Mathlib/NumberTheory/Divisors.lean 1 2 ['github-actions', 'yuanyi-350'] nobody
8-19198
8 days ago
8-22325
8 days ago
8-22036
8 days
38534 AlexeyMilovanov
author:AlexeyMilovanov
 refactor(Computability): bundle PFun into a structure with FunLike instance This PR refactors `PFun` from `def PFun α β := α → Part β` to a structure with a `FunLike` instance. [Discussion](https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/Fix.20for.20fun_prop.20on.20PFun.20.28context.3A.20Computability.20Theory.29) ### Core Architectural Changes * **Structure Transition:** `PFun` is now a structure with a single field `toFun : α → Part β`. Raw lambdas are now explicitly packed using `PFun.mk` or `PFun.lift`. * **API Alignment:** Added the `FunLike (α →. β) α (Part β)` instance and `initialize_simps_projections`. Replaced direct `funext` usage with `DFunLike.ext`. Added comprehensive `@[simp]` lemmas for the structure (`mk_apply`, `coe_mk`, `toFun_eq_coe`, `lift_apply`). * **New Helpers:** Introduced `PFun.const` and `PFun.empty` to reduce boilerplate. Updated the `Inhabited` instance to use `PFun.empty` and added the `default_eq_empty` simp lemma. * **Renaming:** Renamed `Nat.Partrec.some` to `Nat.Partrec.id` (as it now represents `PFun.id ℕ`), and `const_part_some` to `const_some` for consistency. ### API & Breaking Changes * **Loss of Defeq:** `PFun` is no longer definitionally equal to a raw function. Basic lemmas (like `PFun.res_univ`) now require explicit extensionality (`ext x y; rfl`). * **`prodLift_fst_comp_snd_comp`:** Rewrote the LHS using explicit `PFun.mk` wrappers. This resolves a `simpNF` linter failure caused by the new `comp_lift` simp lemma. * **Return Type Changes:** Several core computability definitions (`Nat.Partrec.of_eq_tot`, `StateTransition.eval`) now strictly return or pattern-match on the new structure, breaking implicit coercions. ### Downstream Impact The refactor heavily impacts Computability Theory and Category Theory (`Category/PartialFun.lean`). The strict structure boundary breaks definitional equality, meaning tactics like `simp` and `grind` can no longer "see through" the function automatically. As a result, several proofs (e.g., `fix_aux`, `ppred`, `mem_eval`, and `unitIso`) grew in size, requiring explicit `ext` + `simp` breakdowns. ### Affected Files * **Core:** `Mathlib/Data/PFun.lean` * **Computability:** `Partrec`, `PartrecBasis`, `PartrecCode`, `RE`, `RecursiveIn`, `Ackermann`, `Halting`, `StateTransition`, `TuringDegree`, `TuringMachine/Config` *(Successfully removed the `set_option linter.flexible false` hack)* * **Category Theory:** `Category/PartialFun.lean` *(Successfully removed the `respectTransparency false` hack)* * **Other:** `Data/Finset/PImage.lean`, `NumberTheory/Dioph.lean` ### Note on LLM usage The core `PFun` change caused numerous downstream errors. I initially used an LLM to help draft fixes for these files. Afterwards, I spent a significant amount of time manually correcting and modifying all of the generated changes. new-contributor t-computability awaiting-author 1172/758 Mathlib/CategoryTheory/Category/PartialFun.lean,Mathlib/Computability/Ackermann.lean,Mathlib/Computability/Halting.lean,Mathlib/Computability/Partrec.lean,Mathlib/Computability/PartrecBasis.lean,Mathlib/Computability/PartrecCode.lean,Mathlib/Computability/RE.lean,Mathlib/Computability/RecursiveIn.lean,Mathlib/Computability/StateTransition.lean,Mathlib/Computability/TuringDegree.lean,Mathlib/Computability/TuringMachine/Config.lean,Mathlib/Data/Finset/PImage.lean,Mathlib/Data/PFun.lean,Mathlib/NumberTheory/Dioph.lean 14 8 ['AlexeyMilovanov', 'dagurtomas', 'github-actions', 'j-loreaux', 'mathlib-bors', 'mathlib-merge-conflicts'] nobody
8-17985
8 days ago
8-17986
8 days ago
8-27743
8 days
39139 or4nge19
author:or4nge19
 feat(LinearAlgebra): Schur triangulation Adds Schur triangulation API for algebraically closed `RCLike`, proved by triangularizing an endomorphism, aiming at a more mathlib idiomatic approach than the original one in #20730 as it now (better) specializes the existing triangularization API and generalizes supporting lemmas in more natural places. A prerequisite for porting `Matrix.det_exp` proof from physlib. It also proves half of existing TODO in Eigenspace.Triangularizable. It may need a split into 2 PRs and coordination with #37006 . See [this](https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/Contribute.20Schur.20decomposition/with/532385359) and [this](https://leanprover.zulipchat.com/#narrow/channel/113489-new-members/topic/.28Matrix.20and.20NormedSpace.2Eexp.29.20.7C.20det.20.28exp.20A.29.20.3D.20exp.20.28trace.20A.29/with/581264603) zulip discussions. Co-authored-by: [kuotsanhsu](https://github.com/kuotsanhsu) --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) large-import awaiting-author 687/75 Mathlib.lean,Mathlib/Analysis/InnerProductSpace/GramSchmidtOrtho.lean,Mathlib/Analysis/InnerProductSpace/Triangularizable.lean,Mathlib/LinearAlgebra/Basis/Fin.lean,Mathlib/LinearAlgebra/Basis/Flag.lean,Mathlib/LinearAlgebra/Eigenspace/Basic.lean,Mathlib/LinearAlgebra/Eigenspace/Triangularizable.lean,Mathlib/LinearAlgebra/Matrix/Block.lean,Mathlib/LinearAlgebra/Matrix/Charpoly/Basic.lean,Mathlib/LinearAlgebra/Matrix/SchurTriangulation.lean 10 4 ['dagurtomas', 'github-actions', 'or4nge19', 'wwylele'] nobody
8-17012
8 days ago
8-17012
8 days ago
4-23931
4 days
37722 SabrinaJewson
author:SabrinaJewson
 feat(Order/Cover): intervals equal singletons iff To complement `Set.Icc_eq_singleton_iff`, this introduces: - `Set.Ioc_eq_singleton_iff` / `Set.Ico_eq_singleton_iff` - `Set.Ico_eq_singleton_left_iff` / `Set.Ioc_eq_singleton_right_iff` - `Set.Ioi_eq_singleton_iff` / `Set.Iio_eq_singleton_iff` - `Set.Ioi_eq_singleton_top_iff` / `Set.Iio_eq_singleton_bot_iff` - `Set.Ioo_eq_singleton_iff` --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-order new-contributor awaiting-author maintainer-merge 39/0 Mathlib/Order/Atoms.lean,Mathlib/Order/Cover.lean 2 16 ['Komyyy', 'SabrinaJewson', 'github-actions', 'mathlib-merge-conflicts'] bryangingechen
assignee:bryangingechen
8-12468
8 days ago
10-51825
10 days ago
35-12445
35 days
39026 fpvandoorn
author:fpvandoorn
 feat: add assume tactic Teaching tactic: `assume p, q, r` is short for `intro (_ : p) (_ : q) (_ : r)`. --- [Zulip thread](https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/Assume.20tactic/with/593477478) [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) awaiting-zulip t-meta awaiting-author 123/0 Mathlib.lean,Mathlib/Tactic.lean,Mathlib/Tactic/Assume.lean,MathlibTest/Assume.lean 4 7 ['fpvandoorn', 'github-actions', 'joneugster'] joneugster
assignee:joneugster
8-9755
8 days ago
15-43665
15 days ago
0-1
1 second
35896 harahu
author:harahu
 chore(misc): fix typos The typos were identified by `PyCharm`'s proofreading inspection. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) 34/32 Mathlib/Algebra/BigOperators/Finprod.lean,Mathlib/Algebra/Group/Basic.lean,Mathlib/Algebra/Module/Equiv/Basic.lean,Mathlib/Algebra/Order/CauSeq/Basic.lean,Mathlib/Algebra/Order/Group/Cyclic.lean,Mathlib/Analysis/Analytic/Constructions.lean,Mathlib/Analysis/CStarAlgebra/Matrix.lean,Mathlib/Analysis/Calculus/ContDiff/FaaDiBruno.lean,Mathlib/Control/Traversable/Equiv.lean,Mathlib/Data/Analysis/Filter.lean,Mathlib/Data/Fintype/Order.lean,Mathlib/Data/List/Pairwise.lean,Mathlib/Data/Real/Sqrt.lean,Mathlib/Data/TypeVec.lean,Mathlib/Geometry/Manifold/Immersion.lean,Mathlib/NumberTheory/Dioph.lean,Mathlib/NumberTheory/PellMatiyasevic.lean,Mathlib/Topology/Compactness/Lindelof.lean,Mathlib/Topology/MetricSpace/PiNat.lean,Mathlib/Topology/Sheaves/CommRingCat.lean,docs/references.bib 21 9 ['euprunin', 'github-actions', 'mathlib-bors', 'mathlib-merge-conflicts'] nobody
8-8975
8 days ago
71-80360
71 days ago
7-55245
7 days
39371 fpvandoorn
author:fpvandoorn
 feat: tag lemmas with compactness and closedness --- - [ ] depends on: #39370 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) blocked-by-other-PR 190/11 Mathlib.lean,Mathlib/Tactic.lean,Mathlib/Tactic/Common.lean,Mathlib/Tactic/GrindAttrs.lean,Mathlib/Topology/Basic.lean,Mathlib/Topology/Closure.lean,Mathlib/Topology/Compactness/Compact.lean,Mathlib/Topology/MetricSpace/ProperSpace.lean,Mathlib/Topology/Order/Compact.lean,Mathlib/Topology/Order/OrderClosed.lean,Mathlib/Topology/Separation/Basic.lean,Mathlib/Topology/Separation/Hausdorff.lean,MathlibTest/Compactness.lean 13 2 ['github-actions', 'mathlib-dependent-issues'] nobody
8-8840
8 days ago
8-23111
8 days ago
0-1
1 second
35686 harahu
author:harahu
 chore: run docstrings through mdformat --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict 10282/5889 Mathlib/Algebra/AddTorsor/Defs.lean,Mathlib/Algebra/Algebra/Defs.lean,Mathlib/Algebra/Algebra/Equiv.lean,Mathlib/Algebra/Algebra/NonUnitalHom.lean,Mathlib/Algebra/Algebra/Operations.lean,Mathlib/Algebra/Algebra/RestrictScalars.lean,Mathlib/Algebra/Algebra/Spectrum/Basic.lean,Mathlib/Algebra/Algebra/Spectrum/Quasispectrum.lean,Mathlib/Algebra/Algebra/Subalgebra/Centralizer.lean,Mathlib/Algebra/Algebra/Tower.lean,Mathlib/Algebra/Azumaya/Basic.lean,Mathlib/Algebra/Azumaya/Defs.lean,Mathlib/Algebra/Azumaya/Matrix.lean,Mathlib/Algebra/BigOperators/Expect.lean,Mathlib/Algebra/BigOperators/Group/Finset/Defs.lean,Mathlib/Algebra/BigOperators/Group/Finset/Gaps.lean,Mathlib/Algebra/BigOperators/Group/Finset/Indicator.lean,Mathlib/Algebra/BigOperators/Group/List/Basic.lean,Mathlib/Algebra/BigOperators/Group/Multiset/Defs.lean,Mathlib/Algebra/BigOperators/Ring/Finset.lean,Mathlib/Algebra/BrauerGroup/Defs.lean,Mathlib/Algebra/Category/ContinuousCohomology/Basic.lean,Mathlib/Algebra/Category/FGModuleCat/Limits.lean,Mathlib/Algebra/Category/Grp/Basic.lean,Mathlib/Algebra/Category/Grp/EpiMono.lean,Mathlib/Algebra/Category/Grp/EquivalenceGroupAddGroup.lean,Mathlib/Algebra/Category/Grp/Limits.lean,Mathlib/Algebra/Category/Grp/Ulift.lean,Mathlib/Algebra/Category/ModuleCat/ChangeOfRings.lean,Mathlib/Algebra/Category/ModuleCat/Free.lean,Mathlib/Algebra/Category/ModuleCat/Presheaf.lean,Mathlib/Algebra/Category/ModuleCat/Presheaf/ColimitFunctor.lean,Mathlib/Algebra/Category/ModuleCat/Projective.lean,Mathlib/Algebra/Category/ModuleCat/Sheaf/Limits.lean,Mathlib/Algebra/Category/ModuleCat/Stalk.lean,Mathlib/Algebra/Category/ModuleCat/Topology/Basic.lean,Mathlib/Algebra/Category/MonCat/Basic.lean,Mathlib/Algebra/Category/MonCat/Colimits.lean,Mathlib/Algebra/Category/Ring/Adjunctions.lean,Mathlib/Algebra/Category/Ring/Basic.lean,Mathlib/Algebra/Category/Ring/Constructions.lean,Mathlib/Algebra/Category/Ring/Epi.lean,Mathlib/Algebra/Category/Ring/EqualizerPushout.lean,Mathlib/Algebra/Category/Ring/Topology.lean,Mathlib/Algebra/Category/Semigrp/Basic.lean,Mathlib/Algebra/Central/Basic.lean,Mathlib/Algebra/Central/Defs.lean,Mathlib/Algebra/Central/TensorProduct.lean,Mathlib/Algebra/CharP/Algebra.lean,Mathlib/Algebra/CharP/Basic.lean,Mathlib/Algebra/CharP/CharAndCard.lean,Mathlib/Algebra/CharP/Defs.lean,Mathlib/Algebra/CharP/LinearMaps.lean,Mathlib/Algebra/CharP/MixedCharZero.lean,Mathlib/Algebra/CharP/Subring.lean,Mathlib/Algebra/CharZero/Defs.lean,Mathlib/Algebra/ContinuedFractions/Basic.lean,Mathlib/Algebra/ContinuedFractions/Computation/Basic.lean,Mathlib/Algebra/ContinuedFractions/Computation/CorrectnessTerminating.lean,Mathlib/Algebra/ContinuedFractions/Computation/TerminatesIffRat.lean,Mathlib/Algebra/ContinuedFractions/Computation/Translations.lean,Mathlib/Algebra/ContinuedFractions/ContinuantsRecurrence.lean,Mathlib/Algebra/ContinuedFractions/ConvergentsEquiv.lean,Mathlib/Algebra/DirectSum/Decomposition.lean,Mathlib/Algebra/DirectSum/Idempotents.lean,Mathlib/Algebra/DirectSum/Internal.lean,Mathlib/Algebra/DirectSum/Module.lean,Mathlib/Algebra/Divisibility/Basic.lean,Mathlib/Algebra/Divisibility/Units.lean,Mathlib/Algebra/EuclideanDomain/Defs.lean,Mathlib/Algebra/EuclideanDomain/Field.lean,Mathlib/Algebra/EuclideanDomain/Int.lean,Mathlib/Algebra/Exact.lean,Mathlib/Algebra/Field/Defs.lean,Mathlib/Algebra/Field/Periodic.lean,Mathlib/Algebra/Field/Subfield/Basic.lean,Mathlib/Algebra/Field/Subfield/Defs.lean,Mathlib/Algebra/FreeAlgebra.lean,Mathlib/Algebra/FreeMonoid/Basic.lean,Mathlib/Algebra/FreeMonoid/FreeSemigroup.lean,Mathlib/Algebra/FreeNonUnitalNonAssocAlgebra.lean,Mathlib/Algebra/GCDMonoid/Nat.lean,Mathlib/Algebra/Group/Action/Defs.lean,Mathlib/Algebra/Group/Action/End.lean,Mathlib/Algebra/Group/Action/Pretransitive.lean,Mathlib/Algebra/Group/Action/Prod.lean,Mathlib/Algebra/Group/AddChar.lean,Mathlib/Algebra/Group/Basic.lean,Mathlib/Algebra/Group/Center.lean,Mathlib/Algebra/Group/Commute/Defs.lean,Mathlib/Algebra/Group/Conj.lean,Mathlib/Algebra/Group/Defs.lean,Mathlib/Algebra/Group/End.lean,Mathlib/Algebra/Group/Equiv/Basic.lean,Mathlib/Algebra/Group/Equiv/Defs.lean,Mathlib/Algebra/Group/Ext.lean,Mathlib/Algebra/Group/Finsupp.lean,Mathlib/Algebra/Group/ForwardDiff.lean,Mathlib/Algebra/Group/Hom/CompTypeclasses.lean,Mathlib/Algebra/Group/Hom/Defs.lean 2809 2 ['github-actions', 'mathlib-merge-conflicts'] nobody
8-8080
8 days ago
unknown
0-0
0 seconds
39382 fpvandoorn
author:fpvandoorn
 feat: add some lemmas that closures of some sets are compact * Also tag them with `closedness`/`compactness`. * This can be refactored to use `RelativelyCompact` once we define that notion. * Note: this is only equivalent to `IsBounded` in `ProperSpace`. It is equivalent to `@IsBounded _ (inCompact X) s` in a T2-space, but the latter thing is cumbersome to write. --- - [ ] depends on: #39371 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) blocked-by-other-PR 265/11 Mathlib.lean,Mathlib/Tactic.lean,Mathlib/Tactic/Common.lean,Mathlib/Tactic/GrindAttrs.lean,Mathlib/Topology/Basic.lean,Mathlib/Topology/Closure.lean,Mathlib/Topology/Compactness/Compact.lean,Mathlib/Topology/MetricSpace/Bounded.lean,Mathlib/Topology/MetricSpace/ProperSpace.lean,Mathlib/Topology/Order/Compact.lean,Mathlib/Topology/Order/OrderClosed.lean,Mathlib/Topology/Separation/Basic.lean,Mathlib/Topology/Separation/Hausdorff.lean,MathlibTest/Compactness.lean 14 2 ['github-actions', 'mathlib-dependent-issues'] nobody
8-4751
8 days ago
8-18851
8 days ago
0-359
5 minutes
36541 BGuillemet
author:BGuillemet
 feat(CategoryTheory): define internal equivalence relations Define internal equivalence relations in any category `C`, as a structure on parallel pairs of morphisms. Prove that equivalence relations on types are equivalence relations in the category of types. Prove that kernel pairs are equivalence relations. Define (universally) effective equivalence relations, and a associated class for categories in which every equivalence relation is effective universal. Prove that an effective equivalence relation yields a coequalizer diagram, and that the associated projection on the "quotient" of the relation is a regular epimorphism. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-category-theory 320/0 Mathlib.lean,Mathlib/CategoryTheory/EquivalenceRelation.lean,Mathlib/CategoryTheory/Limits/Shapes/RegularMono.lean 3 26 ['BGuillemet', 'chrisflav', 'dagurtomas', 'github-actions', 'robin-carlier'] b-mehta
assignee:b-mehta
8-2164
8 days ago
8-33330
8 days ago
29-45705
29 days
39387 marcelolynch
author:marcelolynch
 feat(Tactic/Linter): add superfluousExpose linter Dual of `privateModule`: lints against modules with `@[expose] public section` where no declaration needs its body visible downstream. Suggests removing the `@[expose]` modifier. A declaration 'benefits from exposure' iff its body matters to downstream typechecking: plain `def`, plain `inductive`, `@[match_pattern]` def, `@[irreducible] def` / `irreducible_def`, or a `@[to_additive]`-decorated def. Theorems, abbrevs, classes, structures, instances, `unsafe`/`partial` defs, compiler-generated auxiliaries, projections, matchers, and notation- generated parser entries do not. The linter is conservative: known limitations produce a false negative (scoped/local instances and tactic-implementation defs may stay silent), never a false positive that would break downstream builds. Includes test files covering positive and negative cases. Relevant Zulip thread: https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/Removing.20unnecessary.20.60.40.5Bexpose.5D.60/with/595180230 t-linter LLM-generated 897/0 Mathlib.lean,Mathlib/Tactic.lean,Mathlib/Tactic/Linter/SuperfluousExpose.lean,MathlibTest/Linter/SuperfluousExpose.lean,MathlibTest/Linter/SuperfluousExpose/Negative_ExposeInBlockComment.lean,MathlibTest/Linter/SuperfluousExpose/Negative_ExposeOnNonPublicSection.lean,MathlibTest/Linter/SuperfluousExpose/Negative_Inductive.lean,MathlibTest/Linter/SuperfluousExpose/Negative_InstPrefixedDef.lean,MathlibTest/Linter/SuperfluousExpose/Negative_IrreducibleDef.lean,MathlibTest/Linter/SuperfluousExpose/Negative_LocalInstance.lean,MathlibTest/Linter/SuperfluousExpose/Negative_MatchPattern.lean,MathlibTest/Linter/SuperfluousExpose/Negative_NoExposeSection.lean,MathlibTest/Linter/SuperfluousExpose/Negative_PlainDef.lean,MathlibTest/Linter/SuperfluousExpose/Negative_ScopedInstance.lean,MathlibTest/Linter/SuperfluousExpose/Negative_TermPrefixedDef.lean,MathlibTest/Linter/SuperfluousExpose/Negative_ToAdditive.lean,MathlibTest/Linter/SuperfluousExpose/Positive_AbbrevOnly.lean,MathlibTest/Linter/SuperfluousExpose/Positive_ClassOnly.lean,MathlibTest/Linter/SuperfluousExpose/Positive_Notation.lean,MathlibTest/Linter/SuperfluousExpose/Positive_PartialDef.lean,MathlibTest/Linter/SuperfluousExpose/Positive_Recursors.lean,MathlibTest/Linter/SuperfluousExpose/Positive_TheoremOnly.lean,MathlibTest/Linter/SuperfluousExpose/Positive_UnsafeDef.lean 23 2 ['eric-wieser', 'github-actions'] nobody
7-84265
7 days ago
unknown
0-0
0 seconds
36239 plp127
author:plp127
 feat(FieldTheory/KrullTopology): define uniform group structure on galois group Endow the galois group of a field extension `Gal(L/K)` with the structure of a uniform group. Use this to prove some properties of the galois group earlier, for example, that the galois group is compact is immediate, and in more generality than the version proved in `FieldTheory/Galois/Profinite`. Deprecate some material which used to be used to define the krull topology, but is now unused since the krull topology comes out of the uniform structure. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra
label:t-algebra$
 292/220 Mathlib/FieldTheory/Galois/Infinite.lean,Mathlib/FieldTheory/Galois/Profinite.lean,Mathlib/FieldTheory/KrullTopology.lean,Mathlib/NumberTheory/Cyclotomic/CyclotomicCharacter.lean 4 20 ['dagurtomas', 'github-actions', 'mathlib-merge-conflicts', 'plp127', 'vihdzp'] mattrobball
assignee:mattrobball
7-82776
7 days ago
7-82809
7 days ago
54-54367
54 days
37071 ericluap
author:ericluap
 feat: Dedekind completion of rationals is isomorphic to EReal t-order new-contributor 128/4 Mathlib.lean,Mathlib/Data/EReal/Basic.lean,Mathlib/Data/EReal/DedekindCut.lean,Mathlib/Order/Completion.lean 4 55 ['ericluap', 'github-actions', 'vihdzp', 'wwylele'] vihdzp
assignee:vihdzp
7-76377
7 days ago
11-21218
11 days ago
34-16117
34 days
37183 dagurtomas
author:dagurtomas
 feat(Tactic/CategoryTheory): map attribute Adding `@[map]` to a lemma named `H` of shape `∀ .., f = g`, where `f` and `g` are morphisms in some category `C`, creates a new lemma named `H_map` of the form `∀ .. {D} (func : C ⥤ D), F.map f = F.map g` and then applies `simp only [Functor.map_comp, Functor.map_id]`. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) LLM-generated t-meta t-category-theory 290/0 Mathlib.lean,Mathlib/Tactic.lean,Mathlib/Tactic/CategoryTheory/Map.lean,MathlibTest/CategoryTheory/Map.lean,MathlibTest/CategoryTheory/MapSimp.lean 5 11 ['adamtopaz', 'dagurtomas', 'github-actions', 'joelriou'] kim-em
assignee:kim-em
7-74662
7 days ago
31-62703
31 days ago
57-59608
57 days
38095 astrainfinita
author:astrainfinita
 perf(Algebra/*/{InjSurj, TransferInstance}): reduce instance `Expr`s --- We can not just use `fast_instance%`, because `fast_instance%` reduces instances into constructor applications, but their arguments may still not be reduced. This PR continues the work from #13795. Original PR: https://github.com/leanprover-community/mathlib4/pull/13795 [Zulip](https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/instance.20unfolding.20phenomenon/) t-algebra
label:t-algebra$
 401/219 Mathlib/Algebra/Field/Basic.lean,Mathlib/Algebra/Field/TransferInstance.lean,Mathlib/Algebra/Group/Action/Defs.lean,Mathlib/Algebra/Group/Action/TransferInstance.lean,Mathlib/Algebra/Group/InjSurj.lean,Mathlib/Algebra/Group/TransferInstance.lean,Mathlib/Algebra/GroupWithZero/Action/Defs.lean,Mathlib/Algebra/GroupWithZero/Action/End.lean,Mathlib/Algebra/GroupWithZero/Action/TransferInstance.lean,Mathlib/Algebra/GroupWithZero/InjSurj.lean,Mathlib/Algebra/Module/Defs.lean,Mathlib/Algebra/Module/RingHom.lean,Mathlib/Algebra/Ring/InjSurj.lean,Mathlib/Algebra/Ring/TransferInstance.lean,Mathlib/Util/TermReduce.lean,scripts/noshake.json 16 7 ['astrainfinita', 'github-actions', 'leanprover-radar'] jcommelin
assignee:jcommelin
7-74659
7 days ago
36-65136
36 days ago
36-67377
36 days
38825 tb65536
author:tb65536
 feat(RingTheory/Spectrum/FreeLocus): rank of fiber over residue field This PR proves the formula `finrank p.ResidueField (p.Fiber M) = finrank R M`. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-ring-theory t-algebra
label:t-algebra$
 9/0 Mathlib/RingTheory/Spectrum/Prime/FreeLocus.lean 1 1 ['github-actions'] jcommelin
assignee:jcommelin
7-74654
7 days ago
20-85212
20 days ago
20-84925
20 days
39395 marcelolynch
author:marcelolynch
 chore(Tactic/Linter): reword PrivateLinter suggestion This matches the granular-by-default philosophy of the new module system and produces files without superfluous `@[expose] public`, which we also want to flag as undesirable: we steer to making every @[expose] is per-decl and intentional, rather than section-wide Relevant Zulip thread: https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/Removing.20unnecessary.20.60.40.5Bexpose.5D.60/with/595180230 t-linter 11/8 Mathlib/Tactic/Linter/PrivateModule.lean,MathlibTest/PrivateModuleLinter/hasOnlyPrivate.lean,MathlibTest/PrivateModuleLinter/notation3.lean,MathlibTest/PrivateModuleLinter/reservedName2.lean 4 3 ['github-actions', 'grunweg', 'marcelolynch'] JovanGerb
assignee:JovanGerb
7-71075
7 days ago
7-85181
7 days ago
7-84892
7 days
39392 jayscambler
author:jayscambler
 feat(Cryptography): one-time pad and Shannon perfect secrecy Adds `Mathlib/Cryptography/OTP.lean`. One-time pad over an arbitrary finite abelian group `G`: - `OTP.encrypt k m := m + k`, `OTP.decrypt k c := c - k`. - `OTP.correct`: `decrypt k (encrypt k m) = m`, by `abel`. - `OTP.perfect_secrecy`: for any `m₀, m₁`, the distributions of `encrypt k m₀` and `encrypt k m₁` over uniform `k` are equal; both reduce to `PMF.uniformOfFintype G`. Proof goes via `Equiv.addLeft`. Independent of the Schnorr PR (#39279); no shared definitions. Unlike everything else likely to live under `Mathlib/Cryptography/`, the security guarantee here is information-theoretic, not computational. **AI disclosure**: this PR was a collaboration between myself, Grey Haven's autocontext and Claude Opus 4.7 (Anthropic). I read each line and built locally on current master. (strawberry has three r's) new-contributor LLM-generated 76/0 Mathlib.lean,Mathlib/Cryptography/OTP.lean 2 3 ['MrBrain295', 'github-actions'] nobody
7-70458
7 days ago
8-6532
8 days ago
8-6243
8 days
39402 marcelolynch
author:marcelolynch
 feat(ci): add Lake cache shadow workflow for master Introduces a scheduled, non-blocking pipeline that exercises Lake's built-in artifact cache against mathlib master, tracking the eventual migration off `lake exe cache` The workflow runs daily on cron and on workflow_dispatch. Jobs: build_and_stage: 1. Hydrates .lake/build/ via legacy `lake exe cache get` 2. patches the lakefile to enable Lake's artifact cache with three knobs 3. runs an incremental `lake build` to populate Lake's cache from existing artifacts 4. uploads cache artifact for next job. upload: Downloads the staging artifact and pushes it to the cache bucket via `lake cache put-staged`. consume: - `lake cache get` from the cache bucket - `lake build` against the rehydrated cache, `--rehash` verify. CI 406/0 .github/workflows/lake_cache_shadow.yml 1 2 ['github-actions', 'marcelolynch'] nobody
7-70218
7 days ago
7-74004
7 days ago
7-73715
7 days
34507 metakunt
author:metakunt
 feat(NumberTheory/AKSPrimality): Adds the AKS primality test Adds the completed proof for the AKS primality test. Everything except the final theorem is marked private as it's only needed for the final proof. Also everything except the final theorem is namespaced with AKS. ---- Zulip discussion: https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/Aks.20primality.20Theorem.206.2E1.20Claim.20.28i.29.20proven - [ ] depends on: #39404 t-number-theory awaiting-author blocked-by-other-PR 645/0 Mathlib.lean,Mathlib/NumberTheory/AKSPrimality.lean 2 61 ['MichaelStollBayreuth', 'dagurtomas', 'github-actions', 'jcommelin', 'kim-em', 'mathlib-bors', 'mathlib-dependent-issues', 'metakunt', 'qawbecrdtey', 'tb65536', 'vihdzp'] tb65536
assignee:tb65536
7-62544
7 days ago
8-12992
8 days ago
76-34349
76 days
39393 jayscambler
author:jayscambler
 feat(GameTheory): von Neumann minimax theorem for finite matrix games Adds `Mathlib/GameTheory/MatrixGame.lean`. Resolves the TODO at `Mathlib/Topology/Sion.lean:48` ("spell out the particular case of von Neumann theorem") by specialising `Sion.exists_isSaddlePointOn` to the bilinear payoff `∑ i j, x i * M i j * y j` on the pair of standard simplices. Two theorems: - `Matrix.exists_saddle_point`: existence of a saddle point in mathlib's `IsSaddlePointOn` convention (`a` minimiser-in-`X`, `b` maximiser-in-`Y`). - `Matrix.exists_mixedNash`: existence of a mixed Nash equilibrium in the textbook matrix-game orientation (row player maximises, column player minimises). Proved by applying Sion to `-payoff M`. Both forms are useful: the first matches mathlib's existing saddle-point machinery, and the second is the statement most game-theory texts use directly. Supporting lemmas: continuity of the payoff in each argument (linear in each), and quasi-convexity / quasi-concavity from `LinearMap.convexOn` / `LinearMap.concaveOn`. The simplex hypotheses for Sion (`Convex`, `IsCompact`, `Nonempty`) come from existing mathlib lemmas (`convex_stdSimplex`, `isCompact_stdSimplex`, `single_mem_stdSimplex`). Creates a new top-level `Mathlib/GameTheory/` directory; mathlib currently has none. A natural follow-up would be a `Mathlib/GameTheory/NormalForm.lean` for general n-player normal-form games and pure Nash equilibrium. **AI disclosure**: this PR was a collaboration between myself, Grey Haven's autocontext and Claude Opus 4.7 (Anthropic). I read each line and built locally on current master. (strawberry has three r's) t-topology new-contributor LLM-generated 216/2 Mathlib.lean,Mathlib/GameTheory/MatrixGame.lean,Mathlib/Topology/Sion.lean 3 3 ['github-actions', 'vihdzp'] nobody
7-53735
7 days ago
8-1265
8 days ago
0-355
5 minutes
37623 IvanRenison
author:IvanRenison
 feat(Order/RelIso): add theorems about `RelHom.comp` and `RelEmbedding.trans` Co-authored-by: SnirBroshi <26556598+SnirBroshi@users.noreply.github.com> --- Missing of this theorems noticed by @SnirBroshi in #37598 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-order maintainer-merge 18/0 Mathlib/Order/RelIso/Basic.lean 1 8 ['IvanRenison', 'SnirBroshi', 'dagurtomas', 'eric-wieser', 'github-actions'] nobody
7-45289
7 days ago
47-18759
47 days ago
48-42005
48 days
28802 grunweg
author:grunweg
 feat: a tactic linter for continuity/measurability which can be `fun_prop` --- Let's see if this finds further locations in mathlib :tada: This PR also runs the linter in mathlib by default. I strongly think this is a good idea --- but leaves all kinds of fun questions around "where do you import this linter best". Opinions on this welcome; this PR is a first start (but no more). [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) large-import awaiting-CI t-meta 72/0 Mathlib/Tactic/Continuity.lean,Mathlib/Tactic/Measurability.lean,MathlibTest/ContinuityToFunprop.lean 3 15 ['Vierkantor', 'github-actions', 'grunweg', 'mathlib4-merge-conflict-bot'] nobody
7-42582
7 days ago
272-37874
272 days ago
0-260
4 minutes
39296 scholzhannah
author:scholzhannah
 feat: more informative output messages in the flexible linter The current output messages in the flexible linter are: - If the stained location is a hypothesis: `'exact h' uses 'h'!` - If the stained location is the goal: `'exact Nat.le_succ_of_le h' uses '⊢'!` I think the first is not very informative and the second is additionally confusing. So I change them to read: - For a hypothesis: `'exact h' uses 'h', which was modified by a flexible tactic!` - And for the goal: `'exact Nat.le_succ_of_le h' modifies the current goal, which was modified by a flexible tactic!` I also added some more explanation to the messages in the case that all the hypotheses and the goal were stained by `simp at *`. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-linter 128/25 Mathlib/Tactic/Linter/FlexibleLinter.lean,MathlibTest/FlexibleLinter.lean,MathlibTest/ImportHeavyFlexibleLinter.lean 3 6 ['b-mehta', 'github-actions', 'grunweg', 'scholzhannah'] grunweg
assignee:grunweg
7-42317
7 days ago
7-42317
7 days ago
7-42028
7 days
37745 AntoineChambert-Loir
author:AntoineChambert-Loir
 feat(RingTheory/AugmentationIdeal): base change for augmentation ideals Base change for augmentation ideals Co-authored with: @mariainesdff --- - [x] depends on: #37744 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-ring-theory t-algebra large-import
label:t-algebra$
 441/1 Mathlib.lean,Mathlib/Algebra/Algebra/Hom.lean,Mathlib/Algebra/Algebra/Subalgebra/Basic.lean,Mathlib/Algebra/Module/Submodule/Range.lean,Mathlib/LinearAlgebra/Projection.lean,Mathlib/LinearAlgebra/Span/Defs.lean,Mathlib/LinearAlgebra/TensorProduct/Projection.lean,Mathlib/LinearAlgebra/TensorProduct/RightExactness.lean,Mathlib/LinearAlgebra/TensorProduct/Submodule.lean,Mathlib/Order/Disjoint.lean,Mathlib/RingTheory/Ideal/IsAugmentation.lean,Mathlib/RingTheory/TensorProduct/Basic.lean 12 18 ['AntoineChambert-Loir', 'dagurtomas', 'github-actions', 'mathlib-dependent-issues'] nobody
7-39797
7 days ago
7-39868
7 days ago
8-13555
8 days
38205 jcommelin
author:jcommelin
 chore: reduce technical debt in FreimanHom This PR reduces technical debt related to the `CommRing` instance on `Fin (n + 1)`. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-combinatorics large-import awaiting-author 65/27 Mathlib/Combinatorics/Additive/FreimanHom.lean 1 10 ['Vierkantor', 'YaelDillies', 'github-actions', 'jcommelin'] nobody
7-37148
7 days ago
7-37148
7 days ago
22-7183
22 days
38968 eric-wieser
author:eric-wieser
 fix: improve defeqs of comp actions The (deliberately) non-reducible `SMul.comp.smul` definition caused us to end with these failing unification examples at instance reducibility: ```lean example : (Module.compHom ℕ (RingHom.id ℕ)).toSMul = SMul.comp ℕ (RingHom.id ℕ) := by with_reducible_and_instances rfl example : (Module.compHom ℕ (RingHom.id ℕ)).toMulAction = MulAction.compHom ℕ (MonoidHom.id ℕ) := by with_reducible_and_instances rfl ``` There are two issues this fixes: * the `compHom` constructors are inconsistent on whether they use `SMul.comp.smul` or reimplement its contents * we need `SMul.comp.smul` to be instance-reducible, so that when invoked with the identity function it is instance-defeq to the original action. As a bonus, allowing these to unify means we can have a single `SMul.comp_smul_def` lemma that works for all of the `compHom` definitions. We could also consider changing `compHom` to take a `HomClass` in order to remove the casts entirely, which would remove the need to add these `SMul.comp` terms. This PR leaves that for possible future work, noting that in the past we have moved away from writing `def`s taking `HomClass`es. Co-authored-by: Junye Ji --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) Refined from #38777 t-algebra delegated
label:t-algebra$
 35/19 Mathlib/Algebra/Algebra/Defs.lean,Mathlib/Algebra/Group/Action/Defs.lean,Mathlib/Algebra/GroupWithZero/Action/Defs.lean,Mathlib/Algebra/GroupWithZero/Action/End.lean,Mathlib/Algebra/Module/RingHom.lean 5 5 ['JJYYY-JJY', 'Vierkantor', 'eric-wieser', 'github-actions', 'mathlib-bors'] nobody
7-35757
7 days ago
7-35757
7 days ago
8-53809
8 days
38990 Vierkantor
author:Vierkantor
 chore(Algebra/DirectSum): workaround for `backward.inferInstanceAs` This PR works around a `backward.inferInstanceAs` compatibility flag introduced by identifying `DirectSum` with `DFinsupp` in our definitions. We introduce a new dsimp lemma `funLike_eq` that transfers the `FunLike` instances, and now we can use `DirectSum`'s `FunLike` instance, instead of the custom `CoeFun` instance. I unsqueezed a few `simp`s, which all ran pretty much instant on my machine so it shouldn't cause much slowdown. Also we fix two porting notes. This is not a great approach, but it seems the least painful for the short term. The alternative would be to strictly enforce the defeq barrier between `DirectSum` and `DFinsupp`, which would mean a substantial rewrite of this corner of Mathlib. We can't make `DirectSum` an `@[implicit_reducible]`, because we need different multiplication on it than `DFinsupp` has. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra tech debt t-ring-theory awaiting-author
label:t-algebra$
 36/38 Mathlib/Algebra/DirectSum/Basic.lean,Mathlib/Algebra/DirectSum/Internal.lean,Mathlib/Algebra/DirectSum/Ring.lean,Mathlib/Algebra/Lie/DirectSum.lean,Mathlib/Algebra/Order/Module/HahnEmbedding.lean,Mathlib/Analysis/InnerProductSpace/Projection/FiniteDimensional.lean,Mathlib/Analysis/InnerProductSpace/Subspace.lean,Mathlib/RingTheory/MvPolynomial/WeightedHomogeneous.lean,Mathlib/RingTheory/Spectrum/Prime/RingHom.lean 9 3 ['JovanGerb', 'Vierkantor', 'github-actions'] JovanGerb
assignee:JovanGerb
7-35338
7 days ago
8-26747
8 days ago
8-19465
8 days
22925 ggranberry
author:ggranberry
 feat(Mathlib/PlaceHolder/ToeplitzHausdorff): Toeplitz-Hausdorff --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) WIP new-contributor will-close-soon awaiting-author help-wanted t-analysis 411/0 Mathlib/PlaceHolder/ToeplitzHausdorff.lean,Mathlib/PlaceHolder/ToeplitzHausdorff_v2.lean 2 16 ['AntoineChambert-Loir', 'faenuccio', 'ggranberry', 'github-actions', 'vihdzp'] faenuccio
assignee:faenuccio
7-32262
7 days ago
431-23771
431 days ago
3-8649
3 days
37534 EtienneC30
author:EtienneC30
 feat: cardinality of subsets of a given cardinality Given a finite set `s`, the number of subsets of `s` with cardinality `n` is `s.ncard.choose n`. This is analog to [Finset.card_powersetCard](https://leanprover-community.github.io/mathlib4_docs/Mathlib/Data/Finset/Powerset.html#Finset.card_powersetCard) and [Set.powersetCard.card](https://leanprover-community.github.io/mathlib4_docs/Mathlib/Data/Set/PowersetCard.html#Set.powersetCard.card) but with a set of sets rather than involving finsets. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-data 22/0 Mathlib/Data/Set/Card.lean 1 3 ['EtienneC30', 'github-actions', 'joneugster'] joneugster
assignee:joneugster
7-29295
7 days ago
7-29368
7 days ago
49-32229
49 days
39416 AlexBrodbelt
author:AlexBrodbelt
 feat(Mathlib/Tactic/Group): Improved the group tactic The `group` tactic is improved to: 1. Once simplification on the exponents is done, apply left and right cancellation. That is, to normalise expressions like `a * b = a * c` to `b * c` 2. Apply a post-processing where expression of the form `( · )^(-1)` are normalised to use the inversion notation `( · )⁻¹`. This allows immediately being able to use lemmas involving inversion which is how most lemmas are stated. There is another PR which adds some relevant tests. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-meta new-contributor 71/5 Mathlib/Tactic/Group.lean,MathlibTest/Group.lean 2 1 ['github-actions'] nobody
7-28807
7 days ago
7-28940
7 days ago
0-51
51 seconds
34088 kbuzzard
author:kbuzzard
 perf(RingTheory/Kaehler/Polynomial): change universe name for speed-up Changing the choice of `R`'s universe to `v` from `u` in this file means that alphabetically it's after `u_1` which is a workaround for the issue described here https://github.com/leanprover/lean4/issues/12102 . The bottom line is that Lean's defeq algorithm is now able to typecheck the `left_inv` and `right_inv` proofs in `KaehlerDifferential.mvPolynomialEquiv` over 200 times more quickly (for example `right_inv` goes from 54494621 heartbeats to 222096, i.e. from about 5 seconds to about 0.02 seconds on a typical machine). --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) Before this PR, Lean was spending far too long in the proof fields of `KaehlerDifferential.mvPolynomialEquiv`, checking defeq on the following kinds of terms (with `pp.all` on): ``` [isDefEq] [815425.000000] ✅️ @Module.{max u u_1, max u_1 u} (@MvPolynomial.{u_1, u} σ R (@CommRing.toCommSemiring.{u} R inst✝)) (@KaehlerDifferential.{u, max u_1 u} R [20 lines omitted] =?= @Module.{max u u_1, max u u_1} (@MvPolynomial.{u_1, u} σ R (@CommRing.toCommSemiring.{u} R inst✝)) (@KaehlerDifferential.{u, max u u_1} R [pretty much the same 20 lines omitted except with max u_1 u replaced by max u u_1 sometimes] ``` with the crucial difference that the second universes in the terms are `max u_1 u` for the first and `max u u_1` for the second. The proofs were taking a few seconds to compile, and then after compilation the kernel was also taking a few seconds to typecheck them. The alphabetical hack in this PR stops this happening and Lean's defeq algorithm now terminates essentially instantly on these terms. Zulip thread: [#mathlib4 > KaehlerDifferential.mvPolynomialEquiv typechecking @ 💬](https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/KaehlerDifferential.2EmvPolynomialEquiv.20typechecking/near/568614162) t-ring-theory WIP 5/1 Mathlib/RingTheory/Kaehler/Polynomial.lean 1 43 ['Vierkantor', 'erdOne', 'github-actions', 'j-loreaux', 'kbuzzard', 'leanprover-radar', 'mattrobball'] chrisflav
assignee:chrisflav
7-28644
7 days ago
104-10778
104 days ago
8-42588
8 days
39178 yuanyi-350
author:yuanyi-350
 refactor(MeasureTheory): golf `Mathlib/MeasureTheory/Measure/PreVariation` - refactors `Mathlib/MeasureTheory/Measure/PreVariation` by simplifying `sum_le'` and `sum_le_preVariationFun_of_subset` Extracted from #38104 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) codex LLM-generated t-measure-probability 6/20 Mathlib/MeasureTheory/Measure/PreVariation.lean 1 2 ['github-actions', 'yuanyi-350'] nobody
7-27916
7 days ago
11-49660
11 days ago
11-49371
11 days
35685 riccardobrasca
author:riccardobrasca
 feat: reduce the use of Classical.choice ## Let's avoid the axiom of choice! This PR is an experiment in developing a version of `mathlib` that minimizes uses of the axiom of choice, especially in basic declarations. For example, [Finset.image](https://leanprover-community.github.io/mathlib4_docs/Mathlib/Data/Finset/Image.html#Finset.image) currently depends on the axiom of choice in `mathlib` but not on this branch. You can use this PR branch just like any other `mathlib` PR branch, in particular the cache system should work normally (you may get a warning to run `lake exe cache get` manually though, just do it). However, you may notice that it uses a custom `lean4` toolchain. The reason is that Lean core itself currently contains results that rely on choice (in particular, via uses of `grind`). Indeed, this branch uses a custom Lean toolchain built from our fork, currently [this version](https://github.com/riccardobrasca/lean4/releases/latest). You can inspect the diff vs `master` [here](https://github.com/leanprover/lean4/compare/master...riccardobrasca:lean4:less_choice) (this diff also contains some GitHub workflow changes, which can be ignored). For the same reason, we also use a custom version of `batteries`, found at the branch [`less_choice`](https://github.com/riccardobrasca/batteries/tree/less_choice). You can see the diff [here](https://github.com/leanprover-community/batteries/compare/main...riccardobrasca:batteries:less_choice). ### Does it work? If you want to count how many declarations depend on choice (on this branch or on `master`), you can use the following script, written by [Robin Arnez](https://github.com/Rob23oba) and Paul Lezeau (thanks!). ```lean import Mathlib open Lean structure State where visited : NameMap Bool := {} abbrev M := ReaderT Environment <| StateM (NameMap Bool) partial def collect (c : Name) : M Bool := do let collectExpr (e : Expr) : M Bool := e.getUsedConstants.anyM collect let s ← get if let some res := s.find? c then return res let env ← read modify fun s => s.insert c false let res ← match env.checked.get.find? c with | some (ConstantInfo.axiomInfo v) => collectExpr v.type | some (ConstantInfo.defnInfo v) => collectExpr v.type <||> collectExpr v.value | some (ConstantInfo.thmInfo v) => collectExpr v.type <||> collectExpr v.value | some (ConstantInfo.opaqueInfo v) => collectExpr v.type <||> collectExpr v.value | some (ConstantInfo.quotInfo _) => pure false | some (ConstantInfo.ctorInfo v) => collectExpr v.type | some (ConstantInfo.recInfo v) => collectExpr v.type | some (ConstantInfo.inductInfo v) => collectExpr v.type <||> v.ctors.anyM collect | none => pure false modify fun s => s.insert c res return res partial def collectAll : M (Nat × Nat) := do modify fun s => s.insert ``Classical.choice true let env ← read let mut count := 0 let mut total := 0 for (constName, _) in env.constants do total := total + 1 let hasChoice ← collect constName if hasChoice then count := count + 1 return (count, total) run_cmd do let env ← getEnv let (count, total) := collectAll.run env |>.run' {} let pctTimes10 := if total = 0 then 0 else (count * 1000 + total / 2) / total let pctWhole := pctTimes10 / 10 let pctDecimal := pctTimes10 % 10 Lean.logInfo m!"Found {count} constants depending on Classical.choice out of {total} total ({pctWhole}.{pctDecimal}%)" ``` Currently, we have 383493 declaration that depend on choice, over 722290 in total (53.1%). For comparison, `master` has 391709 use of choice (54.2%). More than eight thousands declarations have become choice free! ### Can I contribute? Yes! If you want to help just open a PR in the usual way (to the forks!). Note that I plan to update core not very often, probably only once a month, when `mathlib` does so. ### How to Remove the Dependency on Choice from a declaration? First of all, note that #print axioms does not work with the new module system. If you want to check whether `X` depends on choice, you should create a new file starting with `import Mathlib` and use `#print axioms foo`. If `X` depends on choice and you want to remove that dependency, there are several steps to consider (for simplicity, we focus on the case where `X` is a theorem): * The first question is mathematical: do you have a choice-free proof? Remember that this means a proof that does not use the law of excluded middle. An important remark is that if the answer is not “yes, this result is trivial”, then it is going to be *very hard* to do this in `mathlib`. At the moment, it is better to stick to mathematically trivial or very easy declarations. * `mathlib` is *very* intricate. It is very likely that the proof of `X` consists of just a couple of lines invoking `Y` and `Z`, which are often mathematically almost identical to `X`. In that case, removing choice from `X` amounts to removing choice from `Y` and `Z`. And the same situation may very well arise again for `Y` and `Z`. * In practice, you will quickly find yourself asking: “Where is choice *really* introduced?” To answer this question, you can use the following script: ```lean import Mathlib open Lean Meta Elab Command namespace ChoiceDeps abbrev DepSet := Std.HashSet Name abbrev ChoiceMemo := NameMap Bool def addExprDeps (deps : DepSet) (e : Expr) : DepSet := Id.run <| do let mut out := deps for c in e.getUsedConstants do out := out.insert c return out def directDeps (env : Environment) (decl : Name) : DepSet := let deps := match env.checked.get.find? decl with | some (.axiomInfo v) => addExprDeps {} v.type | some (.defnInfo v) => addExprDeps (addExprDeps {} v.type) v.value | some (.thmInfo v) => addExprDeps (addExprDeps {} v.type) v.value | some (.opaqueInfo v) => addExprDeps (addExprDeps {} v.type) v.value | some (.quotInfo _) => {} | some (.ctorInfo v) => addExprDeps {} v.type | some (.recInfo v) => addExprDeps {} v.type | some (.inductInfo v) => v.ctors.foldl (init := addExprDeps {} v.type) fun acc c => acc.insert c | none => {} deps.erase decl partial def transitiveDeps (env : Environment) (root : Name) : DepSet := let rec visit (decl : Name) (visited : DepSet) : DepSet := if visited.contains decl then visited else (directDeps env decl).toArray.foldl (init := visited.insert decl) fun acc dep => visit dep acc (visit root {}).erase root partial def dependsOnChoiceM (env : Environment) (decl : Name) : StateM ChoiceMemo Bool := do let memo ← get if let some b := memo.find? decl then return b modify fun s => s.insert decl false let deps := directDeps env decl if deps.contains ``Classical.choice then modify fun s => s.insert decl true return true let rec go (i : Nat) (arr : Array Name) : StateM ChoiceMemo Bool := do if h : i < arr.size then let d := arr[i] if ← dependsOnChoiceM env d then return true go (i + 1) arr else return false let res ← go 0 deps.toArray modify fun s => s.insert decl res return res def choiceDependencyGraph (env : Environment) (root : Name) : Array Name × NameMap (Array Name) := let work : StateM ChoiceMemo (Array Name × NameMap (Array Name)) := do let mut bfsOrder : Array Name := #[] let mut graph : NameMap (Array Name) := {} let mut queue : Array Name := #[root] let mut qHead := 0 let mut visited : DepSet := {} while qHead < queue.size do let current := queue[qHead]! qHead := qHead + 1 if visited.contains current then continue if !(← dependsOnChoiceM env current) then continue visited := visited.insert current bfsOrder := bfsOrder.push current let allDeps := directDeps env current let mut choiceDeps : Array Name := #[] if allDeps.contains ``Classical.choice then choiceDeps := choiceDeps.push ``Classical.choice for d in allDeps.toArray.qsort Name.quickLt do if d == ``Classical.choice then continue if ← dependsOnChoiceM env d then choiceDeps := choiceDeps.push d if !visited.contains d then queue := queue.push d graph := graph.insert current choiceDeps return (bfsOrder, graph) work.run' {} def formatGraph (bfsOrder : Array Name) (graph : NameMap (Array Name)) : MessageData := let lines := bfsOrder.toList.filterMap fun n => match graph.find? n with | none => none | some deps => let depsMsg := MessageData.joinSep (deps.toList.map fun d => m!"{.ofConstName d}") ", " some m!"{.ofConstName n} → {depsMsg}" MessageData.joinSep lines "\n" private def dotNode (n : Name) : String := "\"" ++ n.toString ++ "\"" /-- Produce a Graphviz DOT string for the choice-dependency graph. Paste it at https://dreampuf.github.io/GraphvizOnline -/ def formatDot (root : Name) (bfsOrder : Array Name) (graph : NameMap (Array Name)) : String := let edges : Array String := bfsOrder.foldl (init := #[]) fun acc n => match graph.find? n with | none => acc | some deps => deps.foldl (init := acc) fun acc2 d => acc2.push s!" {dotNode n} -> {dotNode d};" let allNodes : Array String := bfsOrder.foldl (init := #[dotNode ``Classical.choice ++ " [shape=diamond, style=filled, fillcolor=tomato]"]) fun acc n => if n == ``Classical.choice then acc else if n == root then acc.push s!"{dotNode n} [style=filled, fillcolor=lightblue]" else acc.push s!"{dotNode n} [style=filled, fillcolor=lightyellow]" let body := ((allNodes.map fun s => " " ++ s) ++ edges).toList "digraph choice_deps {\n rankdir=TB;\n node [fontname=\"Helvetica\", fontsize=10];\n" ++ "\n".intercalate body ++ "\n}" syntax (name := printChoiceDeps) "#print " &"choice_deps_on_choice" ppSpace ident : command syntax (name := printChoiceDepsDot) "#print " &"choice_deps_on_choice_dot" ppSpace ident : command elab_rules : command | `(#print choice_deps_on_choice $id:ident) => do let targets ← liftCoreM <| realizeGlobalConstWithInfos id let env ← getEnv for target in targets do let (bfsOrder, graph) := choiceDependencyGraph env target if graph.isEmpty then logInfo m!"{.ofConstName target}: no dependency on Classical.choice" else logInfo m!"{.ofConstName target}:\n{formatGraph bfsOrder graph}" elab_rules : command | `(#print choice_deps_on_choice_dot $id:ident) => do let targets ← liftCoreM <| realizeGlobalConstWithInfos id let env ← getEnv for target in targets do let (bfsOrder, graph) := choiceDependencyGraph env target if graph.isEmpty then logInfo m!"{.ofConstName target}: no dependency on Classical.choice" else let dot := formatDot target bfsOrder graph IO.FS.writeFile "graph.dot" dot logInfo m!"DOT graph written to graph.dot\n\n{dot}" end ChoiceDeps /- Example: #print choice_deps_on_choice Finset.univ_eq_empty #print choice_deps_on_choice_dot Finset.univ_eq_empty -- paste output into GraphvizOnline -/ ``` * `#print choice_deps_on_choice_dot X` produces a file (text) `graph.dot`: you can copy/paste the content in [https://dreampuf.github.io/GraphvizOnline/](https://dreampuf.github.io/GraphvizOnline/) the see the dependency graph of declaration used in the proof of `X` that depend on choice. Note that those are ordered from `X` to choice (so the first node is always `X` and the last is always choice). An arrow (to the bottom) from `Y` to `Z` means that `Z` is used in the proof of `Y` and the goal is to change some proof (i.e. modifying the arrows) to disconnect `X` from choice. In the low part of the graph you will usually identify an area of declarations really equivalent to choice (usually everything starting with `Classical.` and everything containing `grind` in the name, plus various other stuff) you should of course treat those as they are choice, it's useless to try to touch this area. It's sometimes not easy to guess where to "attack" the graph, but it's fun, enjoy! --- The github workflow files have been copied from Matthew Ballard's [repository](https://github.com/mattrobball/lean4/tree/eqvModLevels/.github/workflows). We thank Matthew for his work. merge-conflict 318/88 Mathlib/Algebra/BigOperators/Group/Finset/Basic.lean,Mathlib/Algebra/BigOperators/Group/Finset/Defs.lean,Mathlib/Algebra/Order/Group/Multiset.lean,Mathlib/Data/Fin/SuccPred.lean,Mathlib/Data/Finset/Basic.lean,Mathlib/Data/Finset/BooleanAlgebra.lean,Mathlib/Data/Finset/Insert.lean,Mathlib/Data/Finset/Powerset.lean,Mathlib/Data/Finset/SDiff.lean,Mathlib/Data/List/Dedup.lean,Mathlib/Data/List/Lattice.lean,Mathlib/Data/List/Nodup.lean,Mathlib/Data/List/Perm/Lattice.lean,Mathlib/Data/Multiset/Bind.lean,Mathlib/Data/Multiset/Count.lean,Mathlib/Data/Multiset/UnionInter.lean,Mathlib/Data/Rat/Defs.lean,Mathlib/Logic/Function/Basic.lean,Mathlib/Order/BooleanAlgebra/Basic.lean,Mathlib/Order/Interval/Finset/Defs.lean,Mathlib/Order/Interval/Finset/Nat.lean,lake-manifest.json,lakefile.lean,lean-toolchain 24 6 ['github-actions', 'mathlib-merge-conflicts', 'mattrobball', 'riccardobrasca'] nobody
7-25487
7 days ago
unknown
0-0
0 seconds
39417 kbuzzard
author:kbuzzard
 perf: make `Ring` extend `AddCommGroupWithOne` `NonAssocRing` already has this pattern. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) This PR was entirely AI-generated but I have read it and am happy with both of the changed lines. WIP t-algebra
label:t-algebra$
 2/2 Mathlib/Algebra/Ring/Defs.lean,Mathlib/FieldTheory/PolynomialGaloisGroup.lean 2 4 ['github-actions', 'kbuzzard', 'leanprover-radar', 'plp127'] nobody
7-22797
7 days ago
7-25244
7 days ago
0-78
1 minute
39117 joelriou
author:joelriou
 feat(CategoryTheory): the right derived functor commutes with the shift A few lemmas are obtained about precomposing and postcomposing left/right Kan extensions or right/left derived functors with equivalences of categories. By applying these results to the equivalences given by shifts, we construct a family of isomorphisms which shows that the right derived functor commutes with shifts, and by proving certain compatibilities, we obtain a `Functor.CommShift` instance of the right derived functor of a functor which commutes with shifts. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-category-theory large-import awaiting-author 413/9 Mathlib.lean,Mathlib/CategoryTheory/Functor/Derived/LeftDerived.lean,Mathlib/CategoryTheory/Functor/Derived/RightDerived.lean,Mathlib/CategoryTheory/Functor/Derived/RightDerivedCommShift.lean,Mathlib/CategoryTheory/Functor/KanExtension/AdjunctionPreserves.lean,Mathlib/CategoryTheory/Functor/KanExtension/Basic.lean,Mathlib/CategoryTheory/Shift/CommShift.lean,Mathlib/CategoryTheory/Shift/Localization.lean 8 10 ['dagurtomas', 'github-actions', 'joelriou', 'robin-carlier'] robin-carlier
assignee:robin-carlier
7-21694
7 days ago
9-17450
9 days ago
3-2306
3 days
39386 MichaelStollBayreuth
author:MichaelStollBayreuth
 chore: shake --keep-implied --keep-prefix --fix --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) WIP tech debt large-import merge-conflict 113346/9457 Mathlib/Algebra/AddConstMap/Basic.lean,Mathlib/Algebra/AddConstMap/Equiv.lean,Mathlib/Algebra/AddTorsor/Basic.lean,Mathlib/Algebra/AddTorsor/Defs.lean,Mathlib/Algebra/AffineMonoid/Basic.lean,Mathlib/Algebra/AffineMonoid/Embedding.lean,Mathlib/Algebra/AffineMonoid/Irreducible.lean,Mathlib/Algebra/AffineMonoid/UniqueSums.lean,Mathlib/Algebra/Algebra/Basic.lean,Mathlib/Algebra/Algebra/Bilinear.lean,Mathlib/Algebra/Algebra/Defs.lean,Mathlib/Algebra/Algebra/Epi.lean,Mathlib/Algebra/Algebra/Equiv.lean,Mathlib/Algebra/Algebra/Field.lean,Mathlib/Algebra/Algebra/Hom.lean,Mathlib/Algebra/Algebra/Hom/Rat.lean,Mathlib/Algebra/Algebra/IsSimpleRing.lean,Mathlib/Algebra/Algebra/NonUnitalHom.lean,Mathlib/Algebra/Algebra/NonUnitalSubalgebra.lean,Mathlib/Algebra/Algebra/Operations.lean,Mathlib/Algebra/Algebra/Opposite.lean,Mathlib/Algebra/Algebra/Pi.lean,Mathlib/Algebra/Algebra/Prod.lean,Mathlib/Algebra/Algebra/Rat.lean,Mathlib/Algebra/Algebra/RestrictScalars.lean,Mathlib/Algebra/Algebra/Shrink.lean,Mathlib/Algebra/Algebra/Spectrum/Basic.lean,Mathlib/Algebra/Algebra/Spectrum/Pi.lean,Mathlib/Algebra/Algebra/Spectrum/Quasispectrum.lean,Mathlib/Algebra/Algebra/StrictPositivity.lean,Mathlib/Algebra/Algebra/Subalgebra/Basic.lean,Mathlib/Algebra/Algebra/Subalgebra/Centralizer.lean,Mathlib/Algebra/Algebra/Subalgebra/Directed.lean,Mathlib/Algebra/Algebra/Subalgebra/IsSimpleOrder.lean,Mathlib/Algebra/Algebra/Subalgebra/Lattice.lean,Mathlib/Algebra/Algebra/Subalgebra/Matrix.lean,Mathlib/Algebra/Algebra/Subalgebra/MulOpposite.lean,Mathlib/Algebra/Algebra/Subalgebra/Operations.lean,Mathlib/Algebra/Algebra/Subalgebra/Order.lean,Mathlib/Algebra/Algebra/Subalgebra/Pi.lean,Mathlib/Algebra/Algebra/Subalgebra/Pointwise.lean,Mathlib/Algebra/Algebra/Subalgebra/Prod.lean,Mathlib/Algebra/Algebra/Subalgebra/Rank.lean,Mathlib/Algebra/Algebra/Subalgebra/Tower.lean,Mathlib/Algebra/Algebra/Subalgebra/Unitization.lean,Mathlib/Algebra/Algebra/Tower.lean,Mathlib/Algebra/Algebra/TransferInstance.lean,Mathlib/Algebra/Algebra/Unitization.lean,Mathlib/Algebra/Algebra/ZMod.lean,Mathlib/Algebra/AlgebraicCard.lean,Mathlib/Algebra/Azumaya/Basic.lean,Mathlib/Algebra/Azumaya/Defs.lean,Mathlib/Algebra/Azumaya/Matrix.lean,Mathlib/Algebra/BigOperators/Associated.lean,Mathlib/Algebra/BigOperators/Balance.lean,Mathlib/Algebra/BigOperators/Expect.lean,Mathlib/Algebra/BigOperators/Field.lean,Mathlib/Algebra/BigOperators/Fin.lean,Mathlib/Algebra/BigOperators/Finprod.lean,Mathlib/Algebra/BigOperators/Finsupp/Basic.lean,Mathlib/Algebra/BigOperators/Finsupp/Fin.lean,Mathlib/Algebra/BigOperators/Group/Finset/Basic.lean,Mathlib/Algebra/BigOperators/Group/Finset/Defs.lean,Mathlib/Algebra/BigOperators/Group/Finset/Gaps.lean,Mathlib/Algebra/BigOperators/Group/Finset/Indicator.lean,Mathlib/Algebra/BigOperators/Group/Finset/Interval.lean,Mathlib/Algebra/BigOperators/Group/Finset/Lemmas.lean,Mathlib/Algebra/BigOperators/Group/Finset/Pi.lean,Mathlib/Algebra/BigOperators/Group/Finset/Piecewise.lean,Mathlib/Algebra/BigOperators/Group/Finset/Powerset.lean,Mathlib/Algebra/BigOperators/Group/Finset/Preimage.lean,Mathlib/Algebra/BigOperators/Group/Finset/Sigma.lean,Mathlib/Algebra/BigOperators/Group/List/Basic.lean,Mathlib/Algebra/BigOperators/Group/List/Lemmas.lean,Mathlib/Algebra/BigOperators/Group/Multiset/Basic.lean,Mathlib/Algebra/BigOperators/Group/Multiset/Defs.lean,Mathlib/Algebra/BigOperators/GroupWithZero/Action.lean,Mathlib/Algebra/BigOperators/GroupWithZero/Finset.lean,Mathlib/Algebra/BigOperators/Intervals.lean,Mathlib/Algebra/BigOperators/ModEq.lean,Mathlib/Algebra/BigOperators/Module.lean,Mathlib/Algebra/BigOperators/NatAntidiagonal.lean,Mathlib/Algebra/BigOperators/Option.lean,Mathlib/Algebra/BigOperators/Pi.lean,Mathlib/Algebra/BigOperators/Ring/Finset.lean,Mathlib/Algebra/BigOperators/Ring/List.lean,Mathlib/Algebra/BigOperators/Ring/Multiset.lean,Mathlib/Algebra/BigOperators/Ring/Nat.lean,Mathlib/Algebra/BigOperators/RingEquiv.lean,Mathlib/Algebra/BigOperators/Sym.lean,Mathlib/Algebra/BigOperators/WithTop.lean,Mathlib/Algebra/BrauerGroup/Defs.lean,Mathlib/Algebra/Category/AlgCat/Basic.lean,Mathlib/Algebra/Category/AlgCat/Limits.lean,Mathlib/Algebra/Category/AlgCat/Monoidal.lean,Mathlib/Algebra/Category/AlgCat/Symmetric.lean,Mathlib/Algebra/Category/BialgCat/Basic.lean,Mathlib/Algebra/Category/BialgCat/Monoidal.lean,Mathlib/Algebra/Category/BoolRing.lean,Mathlib/Algebra/Category/CoalgCat/Basic.lean 7976 3 ['MichaelStollBayreuth', 'github-actions', 'mathlib-merge-conflicts'] nobody
7-20284
7 days ago
8-14116
8 days ago
0-2
2 seconds
36218 Brian-Nugent
author:Brian-Nugent
 feat(CategoryTheory): Add exact sequences for Sheaf Cohomology In this PR, I add the long exact sequence for sheaf cohomology as well as prove that it is functorial. Since sheaf cohomology is defined in terms of `Ext`, this is done using the covariant sequence for `Ext`. --- - [x] depends on: #34742 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-category-theory 229/1 Mathlib.lean,Mathlib/Algebra/Homology/SpectralObject/Page.lean,Mathlib/CategoryTheory/ComposableArrows/Basic.lean,Mathlib/CategoryTheory/Sites/SheafCohomology/ExactSequences.lean 4 29 ['Brian-Nugent', 'dagurtomas', 'github-actions', 'joelriou', 'mathlib-dependent-issues', 'mathlib-merge-conflicts'] robin-carlier
assignee:robin-carlier
7-16666
7 days ago
7-16666
7 days ago
9-42030
9 days
39270 m13683320924-hue
author:m13683320924-hue
 feat: prove strict group homs are stable under Prod.map This PR proves that strict group homomorphisms are stable under product maps. It adds an auxiliary lemma showing that the range restriction of a strict group homomorphism is an open quotient map, and uses it to prove that `MonoidHom.prodMap` preserves `Topology.IsStrictMap`. Towards #38421. t-topology new-contributor 44/0 Mathlib/Topology/Algebra/Group/Basic.lean 1 7 ['eric-wieser', 'github-actions', 'm13683320924-hue'] nobody
7-16615
7 days ago
10-6029
10 days ago
0-1401
23 minutes
36501 AntoineChambert-Loir
author:AntoineChambert-Loir
 feat(RingTheory/GradedAlgebra/Homogeneous/RingQuot): graded structure on the quotient of a graded ring by a homogeneous ideal Define the graded structure on the quotient of a graded ring by a homogeneous ideal Co-authored with: @mariainesdff (Possible TODO: - Maybe define the graded structure on the quotient of a graded module by a homogeneous submodule. - There is also an issue of working with ring congruences rather than with ideals. ) --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra
label:t-algebra$
 545/19 Mathlib.lean,Mathlib/Algebra/DirectSum/Decomposition.lean,Mathlib/AlgebraicGeometry/ProjectiveSpectrum/Basic.lean,Mathlib/AlgebraicGeometry/ProjectiveSpectrum/Scheme.lean,Mathlib/Data/DFinsupp/BigOperators.lean,Mathlib/RingTheory/GradedAlgebra/Basic.lean,Mathlib/RingTheory/GradedAlgebra/Homogeneous/Ideal.lean,Mathlib/RingTheory/GradedAlgebra/Homogeneous/RingQuot.lean,Mathlib/RingTheory/GradedAlgebra/HomogeneousLocalization.lean,Mathlib/RingTheory/Ideal/Span.lean 10 132 ['AntoineChambert-Loir', 'chrisflav', 'eric-wieser', 'github-actions', 'robin-carlier'] eric-wieser and robin-carlier
assignee:eric-wieser assignee:robin-carlier
7-14709
7 days ago
8-4683
8 days ago
47-6372
47 days
39315 marcelolynch
author:marcelolynch
 chore: bulk strip @[expose] from public sections Removed `@[expose]` from `section` headers, flipping each file's default from bodies-exposed to bodies-hidden. This was done with a naive automated process that tried removing the annotation + rebuilding each module, then a global build reverting any failures. A second pass used the compiler hints to reapply @[expose] only to certain definitions within the section. Most high-density `@[expose] section` files were filtered out; smarter automation might still give us some mechanically hideable defs (namely, without any proof changes) inside particular sections that could still be exposed. awaiting-author 279/239 Mathlib/Algebra/AddTorsor/Basic.lean,Mathlib/Algebra/Azumaya/Defs.lean,Mathlib/Algebra/Category/AlgCat/Limits.lean,Mathlib/Algebra/Category/CommAlgCat/FiniteType.lean,Mathlib/Algebra/Category/FGModuleCat/Colimits.lean,Mathlib/Algebra/Category/FGModuleCat/EssentiallySmall.lean,Mathlib/Algebra/Category/FGModuleCat/Limits.lean,Mathlib/Algebra/Category/Grp/Abelian.lean,Mathlib/Algebra/Category/Grp/Images.lean,Mathlib/Algebra/Category/Grp/IsFinite.lean,Mathlib/Algebra/Category/Grp/LeftExactFunctor.lean,Mathlib/Algebra/Category/ModuleCat/Abelian.lean,Mathlib/Algebra/Category/ModuleCat/Algebra.lean,Mathlib/Algebra/Category/ModuleCat/Descent.lean,Mathlib/Algebra/Category/ModuleCat/Free.lean,Mathlib/Algebra/Category/ModuleCat/LeftResolution.lean,Mathlib/Algebra/Category/ModuleCat/Presheaf/Pullback.lean,Mathlib/Algebra/Category/ModuleCat/Products.lean,Mathlib/Algebra/Category/ModuleCat/Sheaf/PullbackContinuous.lean,Mathlib/Algebra/Category/ModuleCat/Subobject.lean,Mathlib/Algebra/Category/ModuleCat/Tannaka.lean,Mathlib/Algebra/Category/MonCat/Colimits.lean,Mathlib/Algebra/Category/Ring/EqualizerPushout.lean,Mathlib/Algebra/Category/Ring/Small.lean,Mathlib/Algebra/Category/Ring/Under/Property.lean,Mathlib/Algebra/ContinuedFractions/Computation/CorrectnessTerminating.lean,Mathlib/Algebra/ContinuedFractions/ConvergentsEquiv.lean,Mathlib/Algebra/DirectSum/Idempotents.lean,Mathlib/Algebra/Expr.lean,Mathlib/Algebra/Field/MinimalAxioms.lean,Mathlib/Algebra/Group/Action/Option.lean,Mathlib/Algebra/Group/Action/Sigma.lean,Mathlib/Algebra/Group/Action/Sum.lean,Mathlib/Algebra/GroupWithZero/Action/Pointwise/Finset.lean,Mathlib/Algebra/HierarchyDesign.lean,Mathlib/Algebra/Homology/BifunctorFlip.lean,Mathlib/Algebra/Homology/BifunctorHomotopy.lean,Mathlib/Algebra/Homology/EulerCharacteristic.lean,Mathlib/Algebra/Homology/HomologicalComplexBiprod.lean,Mathlib/Algebra/Homology/HomotopyCategory/ShortExact.lean,Mathlib/Algebra/Homology/ModelCategory/Lifting.lean,Mathlib/Algebra/Homology/Monoidal.lean,Mathlib/Algebra/Homology/ShortComplex/ConcreteCategory.lean,Mathlib/Algebra/Homology/SpectralObject/FirstPage.lean,Mathlib/Algebra/Homology/Square.lean,Mathlib/Algebra/Homology/TotalComplexSymmetry.lean,Mathlib/Algebra/Lie/Graded.lean,Mathlib/Algebra/Lie/SerreConstruction.lean,Mathlib/Algebra/Module/Presentation/RestrictScalars.lean,Mathlib/Algebra/MonoidAlgebra/Grading.lean,Mathlib/Algebra/MonoidAlgebra/PointwiseSMul.lean,Mathlib/Algebra/MvPolynomial/Counit.lean,Mathlib/Algebra/MvPolynomial/Derivation.lean,Mathlib/Algebra/MvPolynomial/PDeriv.lean,Mathlib/Algebra/NonAssoc/LieAdmissible/Defs.lean,Mathlib/Algebra/Order/Floor/Div.lean,Mathlib/Algebra/Order/Group/Action/End.lean,Mathlib/Algebra/Order/Group/End.lean,Mathlib/Algebra/Order/GroupWithZero/Range.lean,Mathlib/Algebra/Order/Quantale.lean,Mathlib/Algebra/Polynomial/Basis.lean,Mathlib/Algebra/Polynomial/Module/TensorProduct.lean,Mathlib/Algebra/Polynomial/RuleOfSigns.lean,Mathlib/Algebra/Polynomial/Sequence.lean,Mathlib/Algebra/Polynomial/SumIteratedDerivative.lean,Mathlib/Algebra/Ring/Pointwise/Finset.lean,Mathlib/Algebra/Star/Free.lean,Mathlib/AlgebraicTopology/ModelCategory/Basic.lean,Mathlib/AlgebraicTopology/ModelCategory/Over.lean,Mathlib/Analysis/Calculus/Gradient/Basic.lean,Mathlib/Analysis/Polynomial/Norm.lean,Mathlib/CategoryTheory/Abelian/EpiWithInjectiveKernel.lean,Mathlib/CategoryTheory/Abelian/Preradical/Radical.lean,Mathlib/CategoryTheory/Adjunction/AdjointFunctorTheorems.lean,Mathlib/CategoryTheory/Bicategory/Kan/Adjunction.lean,Mathlib/CategoryTheory/Category/Cat/Adjunction.lean,Mathlib/CategoryTheory/Comma/Presheaf/Colimit.lean,Mathlib/CategoryTheory/Distributive/Monoidal.lean,Mathlib/CategoryTheory/Enriched/EnrichedCat.lean,Mathlib/CategoryTheory/Extensive.lean,Mathlib/CategoryTheory/FiberedCategory/Cocartesian.lean,Mathlib/CategoryTheory/FiberedCategory/Fibered.lean,Mathlib/CategoryTheory/Filtered/Small.lean,Mathlib/CategoryTheory/Functor/Derived/PointwiseLeftDerived.lean,Mathlib/CategoryTheory/Functor/Functorial.lean,Mathlib/CategoryTheory/Functor/ReflectsIso/Limits.lean,Mathlib/CategoryTheory/Generator/HomologicalComplex.lean,Mathlib/CategoryTheory/GradedObject/Braiding.lean,Mathlib/CategoryTheory/Join/Final.lean,Mathlib/CategoryTheory/Limits/FinallySmall.lean,Mathlib/CategoryTheory/Limits/FunctorCategory/Shapes/Kernels.lean,Mathlib/CategoryTheory/Limits/FunctorCategory/Shapes/Products.lean,Mathlib/CategoryTheory/Limits/Indization/Category.lean,Mathlib/CategoryTheory/Limits/Indization/FilteredColimits.lean,Mathlib/CategoryTheory/Limits/Indization/LocallySmall.lean,Mathlib/CategoryTheory/Limits/Indization/ParallelPair.lean,Mathlib/CategoryTheory/Limits/Pi.lean,Mathlib/CategoryTheory/Limits/Preserves/BifunctorCokernel.lean,Mathlib/CategoryTheory/Limits/Preserves/Shapes/Kernels.lean,Mathlib/CategoryTheory/Limits/Preserves/Yoneda.lean 237 15 ['b-mehta', 'downstream-reports-automation', 'github-actions', 'grunweg', 'jcommelin', 'leanprover-radar', 'marcelolynch'] nobody
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7 days ago
8-71692
8 days ago
0-22373
6 hours
38899 thorimur
author:thorimur
 feat: `#scope` This PR is the first step in creating a toolset of (transient) utilities for assisting with moving declaration commands between files (including sorting out their dependencies, and integrating their needs into the new location). Capturing the current scope necessary for the command is the first task, and to that end this PR contributes the command `#scope`, which reifies the current scope into portable syntax. `#scope` by itself produces a try-this suggestion placing a scope specification after `#scope`, of the following form: ``` #scope (@[expose])? (public)? (noncomputable)? (section)? scope (universe ...)? (namespace ...)? (open @id₁ @id₂ ...)? (open scoped @id₁ @id₂ ...)? (set_options key₁ val₁, key₂ val₂ ...)? (variable ...)? (include ...)? (omit ...)? ``` This is intended to fully capture the "semantic" aspects of the current scope, but not the full scope stack (and so e.g. disregards `section`s). Likewise this slightly-unusual syntax (e.g. `open @Foo` instead of `open Foo`) is intended to act as a portable record of the open declaration which can be acted on by automation, and to discourage interpretation as a "normal" `open` statement. By itself, this is only a slightly odd `#where`. Future PRs (e.g. #38900) will build on this in order to provide a suite of tools for transporting scopes between files and managing them once there, making it easier to move declarations. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-meta awaiting-author 513/3 Mathlib.lean,Mathlib/Lean/Elab/Options.lean,Mathlib/Lean/Name.lean,Mathlib/Util/Scope.lean,MathlibTest/Scope.lean 5 12 ['JovanGerb', 'Vierkantor', 'github-actions', 'thorimur'] JovanGerb
assignee:JovanGerb
7-12453
7 days ago
9-18105
9 days ago
9-32375
9 days
39429 lecopivo
author:lecopivo
 feat: IsOfAsymptoticClassAt measure asymptotic behavior of functions The idea behind `IsOfAsymptoticClassAt` is to measure asymptotic behavior of a function which we can be used to reason about integrability of a function. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-analysis 346/0 Mathlib/Analysis/Asymptotics/AsymptoticClass.lean 1 2 ['github-actions', 'mathlib-bors'] nobody
7-12275
7 days ago
7-12350
7 days ago
0-8
8 seconds
38900 thorimur
author:thorimur
 feat: `#scope!` This PR extends `#scope ` to `#scope! `, which resets the current scope to match the scope specification. This is intended to enable a user to flip back and forth between having the scope specification, which may have been created in a separate scope and separate file, inactive (`#scope`) and active (`#scope!`), to observe the effects on subsequent commands and declarations. --- - [ ] depends on: #38899 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-meta blocked-by-other-PR 773/3 Mathlib.lean,Mathlib/Lean/Elab/Options.lean,Mathlib/Lean/Name.lean,Mathlib/Util/Scope.lean,MathlibTest/Scope.lean 5 2 ['github-actions', 'mathlib-dependent-issues'] nobody
7-12041
7 days ago
unknown
0-0
0 seconds
39339 marcelolynch
author:marcelolynch
 ci: add !downstream-check PR-validation workflow Adds a comment-triggered workflow that lets maintainers validate a mathlib4 PR against curated downstream Lean projects. A user comments !downstream-check FLT, Toric --merge-branch, carleson@v1.2.3 on a PR and the workflow: * gates the commenter on `author_association ∈ {OWNER, MEMBER, COLLABORATOR}` * calls `scripts/pr_check_downstream/validate_names.sh` from mathlib-ci to parse the grammar + resolve the PR's merge ref * mints an App token and dispatches the heavy build workflow `mathlib-pr-validation.yml` in `leanprover-community/downstream-reports`, * posts an ack comment on the PR Grammar (each comma-separated entry): [@] [--merge-branch] * `` — inventory short name (e.g. `FLT`) or GitHub `owner/repo` slug. Resolved by the dispatched workflow. * `@` — optional. Any git refspec for the downstream's checkout. * `--merge-branch` — optional, per entry. Flips that entry from the default LKG mode (cherry-pick PR onto the downstream's last-known- good mathlib) to merge mode (build against the PR's merge tree). The dispatched workflow does the actual `git clone` / `lake build` work on `leanprover-community/downstream-reports`'s self-hosted runner pool (no CI secrets in scope), and posts one consolidated result comment back to the PR. Companion changes: * leanprover-community/mathlib-ci#37 — the `validate_names.sh` and `post_ack_comment.sh` scripts this workflow invokes (separate PR). CI 168/0 .github/workflows/pr_check_downstream.yml 1 1 ['github-actions'] bryangingechen
assignee:bryangingechen
7-10245
7 days ago
unknown
0-0
0 seconds
39432 DavidLedvinka
author:DavidLedvinka
 feat: HasBoundedENorm t-analysis 133/0 Mathlib/Analysis/Normed/Group/HasBoundedENorm.lean 1 1 ['github-actions'] nobody
7-9815
7 days ago
unknown
0-0
0 seconds
39424 kbuzzard
author:kbuzzard
 chore(Algebra/Field/Defs): add `Ring K` as direct extends arm of `Field` --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) (potentially ridiculous Claude idea) WIP t-algebra
label:t-algebra$
 4/1 Mathlib/Algebra/Field/Defs.lean 1 8 ['github-actions', 'kbuzzard', 'leanprover-radar'] nobody
7-7775
7 days ago
7-14241
7 days ago
0-8
8 seconds
39227 SnirBroshi
author:SnirBroshi
 feat(GroupTheory/Commutator/Basic): `⁅H₁, H₂⁆` is a normal subgroup of `H₁ ⊔ H₂` Shows `⁅H₁, H₂⁆ ≤ H₁ ⊔ H₂` and `(⁅H₁, H₂⁆.subgroupOf <| H₁ ⊔ H₂).Normal`, and adds `_ ≤ normalizer _ ↔` lemmas to help. --- (from the book "Finite Groups" by Daniel Gorenstein) Also renames `AddSubgroup.mem_normalizer_iff_conj_image_eq` because `to_additive` now renames `conj` to `addConj` and this theorem should stay in sync with its counterpart, even though it's not using `to_additive` because `MulAut` isn't additivized. The proofs seem pretty long for such trivial lemmas, suggestions welcome :) [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-group-theory 85/6 Mathlib/Algebra/Group/Subgroup/Basic.lean,Mathlib/GroupTheory/Commutator/Basic.lean 2 6 ['SnirBroshi', 'github-actions', 'tb65536'] tb65536
assignee:tb65536
6-85726
6 days ago
7-33945
7 days ago
10-27699
10 days
39445 justus-springer
author:justus-springer
 feat(AlgebraicGeometry/Birational): composition of rational maps Define composition of partial and rational maps. - [ ] depends on: #39442 - [ ] depends on: #39443 - [ ] depends on: #39317 --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebraic-geometry blocked-by-other-PR 443/13 Mathlib.lean,Mathlib/AlgebraicGeometry/Birational/Composition.lean,Mathlib/AlgebraicGeometry/Birational/Dominant.lean,Mathlib/AlgebraicGeometry/Birational/RationalMap.lean,Mathlib/AlgebraicGeometry/OpenImmersion.lean,Mathlib/AlgebraicGeometry/Restrict.lean,Mathlib/Data/Set/Image.lean 7 2 ['github-actions', 'mathlib-dependent-issues'] nobody
6-82681
6 days ago
6-82682
6 days ago
0-1227
20 minutes
35394 HugLycan
author:HugLycan
 feat(Tactic/Positivity): make positivity work for types that are not partial orders Make positivity work for types that are not partial orders Most PositivityExt haven't been updated for non partial order cases yet. They will be updated in the later PR. `Strictness` now depends on `Option Q(PartialOrder $α)` instead of `Q(PartialOrder $α)`, and the constructors `Strictness.positive`/`Strictness.nonnegative` now have their `Q(PartialOrder $α)` typeclass arguments. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor t-meta maintainer-merge 612/354 Mathlib/Algebra/Order/AbsoluteValue/Basic.lean,Mathlib/Algebra/Order/Algebra.lean,Mathlib/Algebra/Order/BigOperators/Expect.lean,Mathlib/Algebra/Order/BigOperators/Ring/Finset.lean,Mathlib/Algebra/Order/Field/Basic.lean,Mathlib/Algebra/Order/Field/Power.lean,Mathlib/Algebra/Order/Floor/Extended.lean,Mathlib/Algebra/Order/Floor/Ring.lean,Mathlib/Algebra/Order/Interval/Basic.lean,Mathlib/Algebra/Order/Module/Field.lean,Mathlib/Analysis/Complex/Exponential.lean,Mathlib/Analysis/Complex/Order.lean,Mathlib/Analysis/Complex/Trigonometric.lean,Mathlib/Analysis/Complex/UpperHalfPlane/Basic.lean,Mathlib/Analysis/Normed/Group/Basic.lean,Mathlib/Analysis/SpecialFunctions/Bernstein.lean,Mathlib/Analysis/SpecialFunctions/Gamma/Basic.lean,Mathlib/Analysis/SpecialFunctions/Log/Basic.lean,Mathlib/Analysis/SpecialFunctions/Pow/NNReal.lean,Mathlib/Analysis/SpecialFunctions/Pow/Real.lean,Mathlib/Analysis/SpecialFunctions/Trigonometric/Arctan.lean,Mathlib/Analysis/SpecialFunctions/Trigonometric/Basic.lean,Mathlib/Analysis/SpecialFunctions/Trigonometric/DerivHyp.lean,Mathlib/Combinatorics/Enumerative/DyckWord.lean,Mathlib/Combinatorics/SimpleGraph/Regularity/Bound.lean,Mathlib/Combinatorics/SimpleGraph/Triangle/Removal.lean,Mathlib/Data/ENNReal/Basic.lean,Mathlib/Data/ENNReal/Real.lean,Mathlib/Data/EReal/Basic.lean,Mathlib/Data/EReal/Inv.lean,Mathlib/Data/EReal/Operations.lean,Mathlib/Data/NNReal/Defs.lean,Mathlib/Data/Nat/Factorial/DoubleFactorial.lean,Mathlib/Data/Nat/Totient.lean,Mathlib/Data/Rat/Cast/Order.lean,Mathlib/Data/Real/Sqrt.lean,Mathlib/Geometry/Euclidean/Altitude.lean,Mathlib/MeasureTheory/Covering/Besicovitch.lean,Mathlib/MeasureTheory/Integral/Bochner/Basic.lean,Mathlib/MeasureTheory/Measure/Real.lean,Mathlib/NumberTheory/ArithmeticFunction/Misc.lean,Mathlib/NumberTheory/ArithmeticFunction/Zeta.lean,Mathlib/NumberTheory/Height/Basic.lean,Mathlib/NumberTheory/Height/NumberField.lean,Mathlib/NumberTheory/Height/Projectivization.lean,Mathlib/NumberTheory/LucasLehmer.lean,Mathlib/NumberTheory/SelbergSieve.lean,Mathlib/Tactic/Positivity/Basic.lean,Mathlib/Tactic/Positivity/Core.lean,Mathlib/Tactic/Positivity/Finset.lean,Mathlib/Topology/Algebra/InfiniteSum/Order.lean,Mathlib/Topology/MetricSpace/Bounded.lean,Mathlib/Topology/MetricSpace/Pseudo/Defs.lean,MathlibTest/positivity.lean 54 90 ['HugLycan', 'JovanGerb', 'fpvandoorn', 'github-actions', 'joneugster', 'leanprover-radar', 'mathlib-merge-conflicts'] dwrensha
assignee:dwrensha
6-81808
6 days ago
10-81952
10 days ago
58-28269
58 days
39325 mcdoll
author:mcdoll
 feat(FunProp): tag integrableOn Add tags so that `fun_prop` can prove `IntegrableOn` Done at ICERM workshop "Techniques and Tools for the Formalization of Analysis" --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-measure-probability awaiting-author 108/12 Mathlib/MeasureTheory/Function/LocallyIntegrable.lean,Mathlib/MeasureTheory/Integral/IntegrableOn.lean,MathlibTest/FunProp.lean 3 4 ['fpvandoorn', 'github-actions'] nobody
6-79418
6 days ago
7-8084
7 days ago
0-1567
26 minutes
37522 matthewjasper
author:matthewjasper
 chore: adjust Module.Finite instance priority Make instances that are rarely going to be helpful lower priority. Increase the priority of `FiniteDimensional.complexToReal`, because it's more likely correct than the other priority 100 `Module.Finite` instances. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra
label:t-algebra$
 6/4 Mathlib/LinearAlgebra/Complex/FiniteDimensional.lean,Mathlib/LinearAlgebra/Dimension/Free.lean,Mathlib/LinearAlgebra/Dual/Lemmas.lean 3 3 ['github-actions', 'grunweg', 'leanprover-radar'] joelriou
assignee:joelriou
6-74959
6 days ago
51-2466
51 days ago
51-2177
51 days
38731 martinwintermath
author:martinwintermath
 feat(LinearAlgebra/AffineSpace/AffineSubspace): using `AffineSubspace.direction` to reinterpret `AffineSubspace` as `Submodule` * add `AffineSubspace.vsub_self_of_zero_mem` that states `s -ᵥ s = s ` if `0 ∈ s` * add `AffineSubspace.direction_eq_self_of_zero_mem` that states that if `0 ∈ s`, then the directions coerce back to the affine subspace. * add corresponding `CanLift` instance. * modify doc-string of `AffineSubspace.direction` to state that this can be used for reinterpretation of an affine subspace as a submodule. * add `Coe` instance based on `Submodule.toAffineSubspace` and adds corresponding @[coe] attribute. The PR also performs a slight cleanup of the file: statements about `SetLike` or `Submodule.toAffineSubspace` have been moved closer to their respective definitions. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra
label:t-algebra$
 56/26 Mathlib/LinearAlgebra/AffineSpace/AffineSubspace/Defs.lean 1 3 ['github-actions', 'wwylele'] themathqueen
assignee:themathqueen
6-74955
6 days ago
23-13306
23 days ago
23-14168
23 days
39391 emlis42
author:emlis42
 feat(MeasureTheory/Integral): add integral_congr_uIoo This PR adds some congruence lemmas for interval integrals under `NoAtoms μ` and golfs some lemmas. | Lemma | Heartbeats | Proof Elaboration Time | ---- | ---- | ---- `LocallyIntegrable.ae_hasDerivAt_integral` | 7684 → 5235 (−2449, 31%) | 603ms → 445ms (−157ms, 26%) `MonotoneOn.exists_tendsto_deriv_liminf_lintegral_enorm_le` | 31019 → 8388 (−22631, 73%) | 2475ms → 631ms (−1843ms, 74%) `MonotoneOn.intervalIntegral_deriv_mem_uIcc` | 22680 → 5983 (−16697, 73%) | 1713ms → 537ms (−1175ms, 68%) `AbsolutelyContinuousOnInterval.integral_deriv_mul_eq_sub` | 1475 → 845 (−630, 42%) | 92ms → 41ms (−50ms, 55%) `fourierCoeff_liftIco_eq` | 1040 → 703 (−337, 32%) | 55ms → 41ms (−13ms, 24%) `taylor_integral_remainder_aux` | 26585 → 18827 (−7758, 29%) | 2095ms → 1575ms (−520ms, 24%) Profiled on top of commit `9e407aa1ef1be515a1bd0e1c1fc081d5b855f25e` using `set_option trace.profiler true in` and ``` set_option Elab.async false in #count_heartbeats in ``` t-measure-probability new-contributor 52/35 Mathlib/Analysis/Calculus/Taylor.lean,Mathlib/Analysis/Fourier/AddCircle.lean,Mathlib/MeasureTheory/Integral/IntervalIntegral/AbsolutelyContinuousFun.lean,Mathlib/MeasureTheory/Integral/IntervalIntegral/Basic.lean,Mathlib/MeasureTheory/Integral/IntervalIntegral/DerivIntegrable.lean,Mathlib/MeasureTheory/Integral/IntervalIntegral/LebesgueDifferentiationThm.lean 6 2 ['github-actions'] EtienneC30
assignee:EtienneC30
6-74947
6 days ago
8-6554
8 days ago
8-6265
8 days
39436 dtumad
author:dtumad
 chore: Add `seqLeft` and `seqRight` unfolding to monad_norm simp set This PR adds `seqLeft_eq_bind` and `seqRight_eq_bind` to `monad_norm`, so that `<*` and `*>` get unfolded in the same way as `<*>` already does when using the `simp` set. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-meta new-contributor 1/1 Mathlib/Tactic/Attr/Core.lean 1 2 ['github-actions'] dwrensha
assignee:dwrensha
6-74944
6 days ago
7-2133
7 days ago
7-1844
7 days
39440 mckoen
author:mckoen
 feat(AlgebraicTopology/Quasicategory): functor quasi-categories WIP --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebraic-topology WIP t-category-theory 212/0 Mathlib/AlgebraicTopology/Quasicategory/InternalHom.lean,Mathlib/CategoryTheory/MorphismProperty/Comma.lean 2 1 ['github-actions'] nobody
6-74907
6 days ago
6-85432
6 days ago
0-17
17 seconds
39438 SnirBroshi
author:SnirBroshi
 chore(Order/WellFounded): use `to_dual` Creates `argmax`/`argmaxOn` duals to the existing `argmin`/`argminOn`, and `WellFoundedLT.min`/`WellFoundedGT.max` in order to properly dualize `WellFounded.min_le`. Some theorems about `WellFounded{LT/GT}` which didn't have a dual before have to be renamed to make room, e.g. `StrictMono.range_inj` is renamed to `StrictMono.range_inj_of_wellFoundedLT`. --- This is blocking dualizing things in `ConditionallyCompleteLattice/Basic.lean`. `WellFounded.min_le` has ~30 usages in ~10 files, so deprecating it should probably happen in a separate PR. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-order 80/34 Mathlib/Data/Finset/Sort.lean,Mathlib/Order/Hom/Set.lean,Mathlib/Order/WellFounded.lean,Mathlib/SetTheory/Ordinal/Enum.lean 4 5 ['SnirBroshi', 'github-actions', 'vihdzp'] nobody
6-72864
6 days ago
6-72936
6 days ago
6-81243
6 days
39106 SnirBroshi
author:SnirBroshi
 feat(LinearAlgebra/Matrix/Reindex): `AddEquiv` and `RingEquiv` We had `Matrix.reindex` bundled as a `LinearEquiv` and an `AlgEquiv`, and this bundles it as an `AddEquiv` and a `RingEquiv`. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra
label:t-algebra$
 158/43 Mathlib/LinearAlgebra/Matrix/Basis.lean,Mathlib/LinearAlgebra/Matrix/Charpoly/Coeff.lean,Mathlib/LinearAlgebra/Matrix/Reindex.lean,Mathlib/LinearAlgebra/Matrix/Transvection.lean 4 10 ['SnirBroshi', 'eric-wieser', 'github-actions', 'themathqueen'] nobody
6-72423
6 days ago
9-75110
9 days ago
10-10623
10 days
39456 BMMilligan1
author:BMMilligan1
 feat(Probability/PMF): advantageFromHalf for Bool-valued PMFs This PR adds `PMF.advantageFromHalf : PMF Bool → ℝ`, defined as `2 * (p true).toReal - 1`, together with API lemmas covering bounds (`_le_one`, `_neg_one_le`), the zero-advantage characterization (`_eq_zero_iff_half`), `PMF.map` composition (`_map_tsum`), and canonical witness evaluations on `uniformOfFintype Bool`, `pure true`, and `pure false`. ## Motivation The "advantage from half" of a Bernoulli-like distribution is the signed gap of the `true`-probability away from `1/2`, rescaled to `[-1, 1]`. It is the natural decision-algorithm advantage notion in computational complexity: when a heuristic `H : α → Bool` is post-composed with a `PMF α` via `PMF.map`, the resulting `PMF Bool`'s `advantageFromHalf` is the advantage of `H` as a decision procedure on the source distribution. Concretely, the definition supports formalizations of Hirahara 2018 (FOCS, [arXiv:1808.06974](https://arxiv.org/abs/1808.06974)) Theorem 1.1's worst-case-to-average-case reduction for Gap-MCSP, where the heuristic algorithm's advantage `ε(n) = 1/poly(n)` over the uniform truth-table distribution is the load-bearing quantity. The current Mathlib `PMF` library supports `PMF.uniformOfFintype` (see `Mathlib/Probability/Distributions/Uniform.lean`) but lacks the bias-from-half notion at this signature. ## API summary - `PMF.advantageFromHalf : PMF Bool → ℝ` - `PMF.advantageFromHalf_le_one` (`@[simp]`) - `PMF.advantageFromHalf_neg_one_le` (`@[simp]`) - `PMF.advantageFromHalf_eq_zero_iff_half` - `PMF.advantageFromHalf_map_tsum` - `PMF.advantageFromHalf_uniformBool` (witness: advantage 0) - `PMF.advantageFromHalf_pure_true` (witness: advantage 1) - `PMF.advantageFromHalf_pure_false` (witness: advantage -1) ## Notes * The file lives at `Mathlib/Probability/ProbabilityMassFunction/Advantage.lean`, alphabetically before `Basic.lean`, and is imported in `Mathlib.lean` at the corresponding alphabetical position. * All proofs are sorry-free. * The definition is `noncomputable` (matches `PMF` style; `(p true).toReal` threading through `ENNReal`). * No new imports outside the existing PMF / ENNReal substrate. * Maintainer review of the naming (`advantageFromHalf` vs alternative candidates like `biasFromHalf`) and of whether the `tsum`-form composition lemma should be supplemented by a `Finset.sum` variant for `Fintype` sources is most welcome. Co-authored-by: Claude Opus 4.7 (1M context) t-measure-probability new-contributor 120/0 Mathlib.lean,Mathlib/Probability/ProbabilityMassFunction/Advantage.lean 2 2 ['github-actions'] nobody
6-70971
6 days ago
unknown
0-0
0 seconds
39404 metakunt
author:metakunt
 feat(NumberTheory/AKSPrimality): Introspective definition This defines the introspective relation and proves the key property for the AKS theorem. From #34507 t-number-theory awaiting-author 147/0 Mathlib.lean,Mathlib/NumberTheory/AKSPrimality.lean 2 2 ['github-actions', 'tb65536'] tb65536
assignee:tb65536
6-67378
6 days ago
6-67378
6 days ago
0-85415
23 hours
37076 ertwro
author:ertwro
 feat(Combinatorics/SimpleGraph/Hasse): Hasse diagram is triangle-free Add `SimpleGraph.hasse_cliqueFree_three`: the Hasse diagram of a preorder is triangle-free (`CliqueFree 3`). This is the graph-theoretic formulation of `not_covBy_of_lt_of_lt`: if `a ⋖ b` and `b ⋖ c`, then `¬ a ⋖ c`, so no three elements can be pairwise adjacent in the Hasse diagram. The proof extracts three vertices from a hypothetical 3-clique, case-splits on the covering directions (8 cases), and closes each by `not_covBy_of_lt_of_lt` (6 transitive cases) or `lt_asymm` (2 cyclic cases). --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-combinatorics new-contributor 11/0 Mathlib/Combinatorics/SimpleGraph/Hasse.lean 1 21 ['Rida-Hamadani', 'SnirBroshi', 'ertwro', 'github-actions', 'vlad902'] nobody
6-60858
6 days ago
33-64334
33 days ago
41-73825
41 days
39229 grunweg
author:grunweg
 dev: towards `fun_prop` on manifolds --- - [ ] depends on: #39226 Rebased version of #31580. Meant to be a prototype that demonstrate how this could possibly work. Not functional yet; waiting on cache to continue. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-meta merge-conflict 305/1 Mathlib/Geometry/Manifold/Notation.lean,Mathlib/Tactic/FunProp/Core.lean,MathlibTest/DifferentialGeometry/FunPropM.lean,MathlibTest/fun_prop_dev.lean 4 4 ['github-actions', 'mathlib-dependent-issues', 'mathlib-merge-conflicts'] nobody
6-59207
6 days ago
10-72779
10 days ago
0-12
12 seconds
37405 Paul-Lez
author:Paul-Lez
 feat(Mathlib/Algebra/BigOperators/Fin): lemma about List.ofFn I tried several places for this lemma but wasn't able to find any one that didn't result in a `large-import` issue - suggestions would be welcome! --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra large-import awaiting-author
label:t-algebra$
 7/0 Mathlib/Algebra/BigOperators/GroupWithZero/Action.lean 1 2 ['YaelDillies', 'github-actions'] nobody
6-56055
6 days ago
6-56055
6 days ago
4-51272
4 days
37707 MavenRain
author:MavenRain
 feat(Combinatorics/SimpleGraph): add IsMaximalClique/IsMaximalIndepSet, refactor IsMaximum* to MaximalFor Addresses #34962 new-contributor t-combinatorics 63/31 Mathlib/Combinatorics/SimpleGraph/Clique.lean 1 6 ['MavenRain', 'SnirBroshi', 'eric-wieser', 'github-actions'] nobody
6-54181
6 days ago
6-54253
6 days ago
6-55604
6 days
31730 thorimur
author:thorimur
 feat(Meta): declaration manipulation meta API: allow logging on type signature of theorems This PR introduces some initial definitions in the space of a declaration manipulation meta API. In the course of #31142, it became apparent that we could benefit from having tools for handling the syntax and elaboration info of user-written declarations. This PR makes a small beginning towards that end in the Mathlib.Util.DeclarationManipulation module, and provides API for - getting the info and syntax ref of a declaration given its `Name` - getting the ref of a theorem's type signature from within some command source syntax given the declaration's ref given above - running a monadic action with the ambient ref set to that of the type signature of a theorem, with sensible fallbacks This is used to improve logging locations for the unused-instances-in-types linters, and may be useful for other linters that want to inpsect a theorem's type at the expression level (instead of the syntax level). (It also introduces the small helper definitions `Syntax.findSome?` and `Syntax.rangeEq`, which behave as expected.) For context: in the future, it would be nice to - provide support for all sorts of declarations, not just theorems--but this requires a lot more syntax matching - provide "exploded views" of declaration syntax like `mkDefView`, but finer grained, and geared for use during linting rather than elaboration - make it easy to compose complex suggestions to transform different parts of a declaration at once --- - [x] depends on: #31725 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-meta merge-conflict 131/0 Mathlib.lean,Mathlib/Lean/Syntax.lean,Mathlib/Util/DeclarationManipulation.lean 3 5 ['github-actions', 'mathlib-merge-conflicts', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
6-49246
6 days ago
168-65486
168 days ago
2-29773
2 days
38317 WenrongZou
author:WenrongZou
 feat(Date/Choose): add some lemmas about choose of prime pow In this PR, I add some lemma about choose of prime pow. 1) For primes `p` and positive integer `n`, assume that for all `i ∈ Icc 1 (n - 1)`, `choose n i` congruent to `0` module `p`, then `n = p ^ multiplicity p n`. 2) For a prime power `n`, the greatest common divisor of `choose n 1, ⋯, choose n (n - 1)` is actually the minimal prime factor of `n`. 3) For a natural number `n` greater than `1`, assume that `n` is not a prime power, then the greatest common divisor of `choose n 1, ⋯, choose n (n - 1)` is `1`. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-data 98/0 Mathlib/Data/Nat/Choose/Lucas.lean 1 5 ['WenrongZou', 'github-actions', 'joneugster'] joneugster
assignee:joneugster
6-47646
6 days ago
6-47446
6 days ago
31-84245
31 days
38052 WenrongZou
author:WenrongZou
 feat(FormalGroup): `F(X,0)=X` and `F(0,X)=X` In this PR, I prove that given a formal group law `F`, then `F(X,0) = X` and `F(0,X) = X`. And modify the definition of `FormalGroup.Point` to be a subtype. And prove that this subtype is a `AddZeroClass`. Eventually we will prove that this is a `AddGroup`. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-ring-theory 255/33 Mathlib/RingTheory/FormalGroup/Basic.lean,Mathlib/RingTheory/MvPowerSeries/Substitution.lean,Mathlib/RingTheory/PowerSeries/Basic.lean,Mathlib/RingTheory/PowerSeries/Evaluation.lean,Mathlib/RingTheory/PowerSeries/Substitution.lean 5 17 ['WenrongZou', 'eric-wieser', 'github-actions', 'mariainesdff'] mattrobball
assignee:mattrobball
6-47349
6 days ago
20-1689
20 days ago
37-86253
37 days
37056 lecopivo
author:lecopivo
 feat(Tactic/FunProp): proper support for metavariables in fun_prop goals This PR add proper support for metavariables in `fun_prop` goals thus allows for properly solving goals like `HasFDerivAt k f ?f' x`. --- This extension to `fun_prop` will enable computation of derivatives by properly handling metavariables in `fun_prop` goal thus allowing us to solve `HasFDerivAt k f ?f' x` [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-meta large-import awaiting-author merge-conflict 1217/220 Mathlib.lean,Mathlib/Tactic.lean,Mathlib/Tactic/FunProp/Attr.lean,Mathlib/Tactic/FunProp/Core.lean,Mathlib/Tactic/FunProp/Decl.lean,Mathlib/Tactic/FunProp/Elab.lean,Mathlib/Tactic/FunProp/Simproc.lean,Mathlib/Tactic/FunProp/Theorems.lean,Mathlib/Tactic/FunProp/Types.lean,Mathlib/Tactic/Measurability.lean,MathlibTest/FunPropMinimal.lean,MathlibTest/FunPropMinimalOutParam.lean 12 31 ['eric-wieser', 'github-actions', 'lecopivo', 'mathlib-merge-conflicts', 'thorimur'] alexjbest and thorimur
assignee:alexjbest assignee:thorimur
6-46210
6 days ago
49-73052
49 days ago
7-45984
7 days
37231 lecopivo
author:lecopivo
 feat(Tactic/FunProp): set up `fun_prop` for HasFDerivAt Correctly set up `fun_prop` for `HasFDerivAt` and set up `deriv_simproc` for simplifying `fderiv ...`. - [ ] depends on: #37056 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) blocked-by-other-PR large-import t-meta merge-conflict 1327/228 Mathlib.lean,Mathlib/Analysis/Calculus/FDeriv/Basic.lean,Mathlib/Analysis/Calculus/FDeriv/Comp.lean,Mathlib/Analysis/Calculus/FDeriv/ContinuousAlternatingMap.lean,Mathlib/Analysis/Calculus/FDeriv/ContinuousMultilinearMap.lean,Mathlib/Analysis/Calculus/FDeriv/Defs.lean,Mathlib/Analysis/Calculus/FDeriv/Pow.lean,Mathlib/Analysis/Calculus/FDeriv/Prod.lean,Mathlib/Analysis/SpecialFunctions/Arsinh.lean,Mathlib/Analysis/SpecialFunctions/ExpDeriv.lean,Mathlib/Analysis/SpecialFunctions/Sqrt.lean,Mathlib/Tactic.lean,Mathlib/Tactic/FunProp.lean,Mathlib/Tactic/FunProp/Attr.lean,Mathlib/Tactic/FunProp/Core.lean,Mathlib/Tactic/FunProp/Decl.lean,Mathlib/Tactic/FunProp/Elab.lean,Mathlib/Tactic/FunProp/Simproc.lean,Mathlib/Tactic/FunProp/Theorems.lean,Mathlib/Tactic/FunProp/Types.lean,Mathlib/Tactic/Measurability.lean,MathlibTest/FunProp.lean,MathlibTest/FunPropMinimal.lean,MathlibTest/FunPropMinimalOutParam.lean 24 4 ['github-actions', 'mathlib-dependent-issues', 'mathlib-merge-conflicts'] nobody
6-46209
6 days ago
57-15291
57 days ago
0-432
7 minutes
37270 lecopivo
author:lecopivo
 feat(Tactic/FunProp): set up fun_prop for HasDerivAt Correctly set up fun_prop for `HasDerivAt` and set up deriv_simproc for simplifying `deriv ...`. - [ ] depends on: #37231 - [ ] depends on: #37056 --> [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) blocked-by-other-PR large-import t-meta merge-conflict 1709/252 Mathlib.lean,Mathlib/Analysis/Calculus/Deriv/Add.lean,Mathlib/Analysis/Calculus/Deriv/AffineMap.lean,Mathlib/Analysis/Calculus/Deriv/Basic.lean,Mathlib/Analysis/Calculus/Deriv/Comp.lean,Mathlib/Analysis/Calculus/Deriv/Inv.lean,Mathlib/Analysis/Calculus/Deriv/Linear.lean,Mathlib/Analysis/Calculus/Deriv/Mul.lean,Mathlib/Analysis/Calculus/Deriv/Pi.lean,Mathlib/Analysis/Calculus/Deriv/Pow.lean,Mathlib/Analysis/Calculus/Deriv/Prod.lean,Mathlib/Analysis/Calculus/Deriv/Star.lean,Mathlib/Analysis/Calculus/Deriv/ZPow.lean,Mathlib/Analysis/Calculus/FDeriv/Basic.lean,Mathlib/Analysis/Calculus/FDeriv/Comp.lean,Mathlib/Analysis/Calculus/FDeriv/ContinuousAlternatingMap.lean,Mathlib/Analysis/Calculus/FDeriv/ContinuousMultilinearMap.lean,Mathlib/Analysis/Calculus/FDeriv/Defs.lean,Mathlib/Analysis/Calculus/FDeriv/Pow.lean,Mathlib/Analysis/Calculus/FDeriv/Prod.lean,Mathlib/Analysis/SpecialFunctions/Arcosh.lean,Mathlib/Analysis/SpecialFunctions/Arsinh.lean,Mathlib/Analysis/SpecialFunctions/Complex/LogDeriv.lean,Mathlib/Analysis/SpecialFunctions/ExpDeriv.lean,Mathlib/Analysis/SpecialFunctions/Exponential.lean,Mathlib/Analysis/SpecialFunctions/Log/Deriv.lean,Mathlib/Analysis/SpecialFunctions/Pow/Deriv.lean,Mathlib/Analysis/SpecialFunctions/Sqrt.lean,Mathlib/Analysis/SpecialFunctions/Trigonometric/ArctanDeriv.lean,Mathlib/Analysis/SpecialFunctions/Trigonometric/ComplexDeriv.lean,Mathlib/Analysis/SpecialFunctions/Trigonometric/Deriv.lean,Mathlib/Analysis/SpecialFunctions/Trigonometric/DerivHyp.lean,Mathlib/Analysis/SpecialFunctions/Trigonometric/InverseDeriv.lean,Mathlib/Tactic.lean,Mathlib/Tactic/FunProp.lean,Mathlib/Tactic/FunProp/Attr.lean,Mathlib/Tactic/FunProp/Core.lean,Mathlib/Tactic/FunProp/Decl.lean,Mathlib/Tactic/FunProp/Elab.lean,Mathlib/Tactic/FunProp/Simproc.lean,Mathlib/Tactic/FunProp/Theorems.lean,Mathlib/Tactic/FunProp/Types.lean,Mathlib/Tactic/Measurability.lean,MathlibTest/FunProp.lean,MathlibTest/FunPropMinimal.lean,MathlibTest/FunPropMinimalOutParam.lean 46 4 ['github-actions', 'mathlib-dependent-issues', 'mathlib-merge-conflicts'] nobody
6-46208
6 days ago
56-36194
56 days ago
0-350
5 minutes
39140 kim-em
author:kim-em
 feat(scripts): add lake exe no_expose tool for @[expose] removal This PR adds `lake exe no_expose`, a tool that identifies and removes `@[expose]` attributes on defs that aren't needed downstream. Three subcommands: `collect`, `report`, `edit`. The `collect` subcommand walks the built Mathlib environment via `Lean.withImportModules` to emit per-decl enumeration, static cross-references, and per-decl reference lists. Without `--skip-build` it additionally patches the lakefile to enable `diagnostics=true / diagnostics.threshold=0` and parses the build log for unfold events; backups are restored on cleanup or on startup recovery from an interrupted run. The `edit` subcommand resolves a `@[expose] public section` file by dropping the section-level marker and re-adding `@[expose]` only on needed decls (`auto`/`section`/`individual` strategies; merges into existing attribute lists correctly to avoid stacked `@[...]` blocks). Edits apply by default; `--dry-run` previews. Refuses on uncommitted changes or stale report data unless explicitly overridden; differential parse-validation before writing; `--verify` runs `lake build` on the touched module and rolls back on failure; every change is recorded as a unified diff in `scripts/.no_expose/edits.patch`. 🤖 Prepared with Claude Code merge-conflict 8185/1240 .github/workflows/build_template.yml,.gitignore,Archive/Examples/IfNormalization/Result.lean,Archive/Imo/Imo1988Q6.lean,Archive/Imo/Imo2024Q6.lean,Cache/Requests.lean,Counterexamples/Phillips.lean,Mathlib.lean,Mathlib/Algebra/Algebra/NonUnitalHom.lean,Mathlib/Algebra/Algebra/Unitization.lean,Mathlib/Algebra/BigOperators/Group/Finset/Basic.lean,Mathlib/Algebra/BigOperators/Group/List/Basic.lean,Mathlib/Algebra/Category/AlgCat/Basic.lean,Mathlib/Algebra/Category/AlgCat/Limits.lean,Mathlib/Algebra/Category/CoalgCat/ComonEquivalence.lean,Mathlib/Algebra/Category/ContinuousCohomology/Basic.lean,Mathlib/Algebra/Category/Grp/AB.lean,Mathlib/Algebra/Category/Grp/Adjunctions.lean,Mathlib/Algebra/Category/Grp/Biproducts.lean,Mathlib/Algebra/Category/Grp/Colimits.lean,Mathlib/Algebra/Category/Grp/LargeColimits.lean,Mathlib/Algebra/Category/Grp/LeftExactFunctor.lean,Mathlib/Algebra/Category/Grp/Yoneda.lean,Mathlib/Algebra/Category/ModuleCat/Adjunctions.lean,Mathlib/Algebra/Category/ModuleCat/Biproducts.lean,Mathlib/Algebra/Category/ModuleCat/ChangeOfRings.lean,Mathlib/Algebra/Category/ModuleCat/Colimits.lean,Mathlib/Algebra/Category/ModuleCat/Differentials/Presheaf.lean,Mathlib/Algebra/Category/ModuleCat/ExteriorPower.lean,Mathlib/Algebra/Category/ModuleCat/FilteredColimits.lean,Mathlib/Algebra/Category/ModuleCat/Kernels.lean,Mathlib/Algebra/Category/ModuleCat/LeftResolution.lean,Mathlib/Algebra/Category/ModuleCat/Limits.lean,Mathlib/Algebra/Category/ModuleCat/Monoidal/Adjunction.lean,Mathlib/Algebra/Category/ModuleCat/Presheaf.lean,Mathlib/Algebra/Category/ModuleCat/Presheaf/ColimitFunctor.lean,Mathlib/Algebra/Category/ModuleCat/Presheaf/Colimits.lean,Mathlib/Algebra/Category/ModuleCat/Presheaf/Free.lean,Mathlib/Algebra/Category/ModuleCat/Presheaf/Generator.lean,Mathlib/Algebra/Category/ModuleCat/Presheaf/Limits.lean,Mathlib/Algebra/Category/ModuleCat/Presheaf/Monoidal.lean,Mathlib/Algebra/Category/ModuleCat/Presheaf/Pushforward.lean,Mathlib/Algebra/Category/ModuleCat/Presheaf/Sheafification.lean,Mathlib/Algebra/Category/ModuleCat/Presheaf/Sheafify.lean,Mathlib/Algebra/Category/ModuleCat/Sheaf/Free.lean,Mathlib/Algebra/Category/ModuleCat/Sheaf/PullbackContinuous.lean,Mathlib/Algebra/Category/ModuleCat/Sheaf/PullbackFree.lean,Mathlib/Algebra/Category/ModuleCat/Sheaf/PushforwardContinuous.lean,Mathlib/Algebra/Category/ModuleCat/Sheaf/Quasicoherent.lean,Mathlib/Algebra/Category/ModuleCat/Stalk.lean,Mathlib/Algebra/Category/ModuleCat/Topology/Basic.lean,Mathlib/Algebra/Category/ModuleCat/Topology/Homology.lean,Mathlib/Algebra/Category/ModuleCat/Ulift.lean,Mathlib/Algebra/Category/MonCat/Adjunctions.lean,Mathlib/Algebra/Category/MonCat/Colimits.lean,Mathlib/Algebra/Category/MonCat/FilteredColimits.lean,Mathlib/Algebra/Category/MonCat/Limits.lean,Mathlib/Algebra/Category/MonCat/Yoneda.lean,Mathlib/Algebra/Category/Ring/Adjunctions.lean,Mathlib/Algebra/Category/Ring/Colimits.lean,Mathlib/Algebra/Category/Ring/Constructions.lean,Mathlib/Algebra/Category/Ring/FinitePresentation.lean,Mathlib/Algebra/Category/Ring/Limits.lean,Mathlib/Algebra/Category/Ring/Under/Basic.lean,Mathlib/Algebra/Category/Ring/Under/Limits.lean,Mathlib/Algebra/CharP/Two.lean,Mathlib/Algebra/Colimit/DirectLimit.lean,Mathlib/Algebra/DirectSum/Algebra.lean,Mathlib/Algebra/DirectSum/Ring.lean,Mathlib/Algebra/DualNumber.lean,Mathlib/Algebra/Group/Defs.lean,Mathlib/Algebra/Group/Equiv/Basic.lean,Mathlib/Algebra/Group/Ext.lean,Mathlib/Algebra/Group/Nat/Even.lean,Mathlib/Algebra/Group/Submonoid/BigOperators.lean,Mathlib/Algebra/GroupWithZero/Action/Faithful.lean,Mathlib/Algebra/Homology/Additive.lean,Mathlib/Algebra/Homology/AlternatingConst.lean,Mathlib/Algebra/Homology/Augment.lean,Mathlib/Algebra/Homology/Bifunctor.lean,Mathlib/Algebra/Homology/BifunctorAssociator.lean,Mathlib/Algebra/Homology/BifunctorHomotopy.lean,Mathlib/Algebra/Homology/BifunctorShift.lean,Mathlib/Algebra/Homology/CochainComplexOpposite.lean,Mathlib/Algebra/Homology/CochainComplexPlus.lean,Mathlib/Algebra/Homology/CommSq.lean,Mathlib/Algebra/Homology/ComplexShape.lean,Mathlib/Algebra/Homology/ComplexShapeSigns.lean,Mathlib/Algebra/Homology/DerivedCategory/Basic.lean,Mathlib/Algebra/Homology/DerivedCategory/ExactFunctor.lean,Mathlib/Algebra/Homology/DerivedCategory/Ext/Basic.lean,Mathlib/Algebra/Homology/DerivedCategory/Ext/EnoughInjectives.lean,Mathlib/Algebra/Homology/DerivedCategory/Ext/EnoughProjectives.lean,Mathlib/Algebra/Homology/DerivedCategory/Ext/ExactSequences.lean,Mathlib/Algebra/Homology/DerivedCategory/Ext/ExtClass.lean,Mathlib/Algebra/Homology/DerivedCategory/Ext/Map.lean,Mathlib/Algebra/Homology/DerivedCategory/HomologySequence.lean,Mathlib/Algebra/Homology/DerivedCategory/KInjective.lean,Mathlib/Algebra/Homology/DerivedCategory/KProjective.lean,Mathlib/Algebra/Homology/DerivedCategory/ShortExact.lean 1416 1 ['urkud'] nobody
6-44550
6 days ago
unknown
0-0
0 seconds
36777 jjdishere
author:jjdishere
 feat(Valuation/ValuativeRel): generalize `ValuativeRel` to non-commutative rings This is the second in a series of PRs, with the final goal of removing the class `Valued` from Mathlib. A `Valued` instance will be replaced by `[ValuativeRel R] [UniformSpace R] [IsValuativeTopology R] [IsUniformAddGroup R] (v : Valuation R A) [v.Compatible]`. This PR generalize `ValuativeRel` from `CommRing` to `Ring` by adding a field `vle_mul_comm {x y} : vle (x * y) (y * x)`. Without this field, the value group associated to the valuative relation may be non-abelian. The APIs of `ValuativeRel.ofValuation` and `ValuativeRel.valuation` are also generalized, showing this new definition is indeed equivalent to the valuations on non commutative rings. This is a prerequisite of #36769 . --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-ring-theory awaiting-author merge-conflict 210/128 Mathlib/RingTheory/DedekindDomain/AdicValuation.lean,Mathlib/RingTheory/Valuation/DiscreteValuativeRel.lean,Mathlib/RingTheory/Valuation/RankOne.lean,Mathlib/RingTheory/Valuation/ValuativeRel/Basic.lean,Mathlib/RingTheory/Valuation/ValuativeRel/Trivial.lean,Mathlib/Topology/Algebra/ValuativeRel/ValuativeTopology.lean,Mathlib/Topology/Algebra/Valued/ValuativeRel.lean,Mathlib/Topology/Algebra/Valued/WithVal.lean 8 47 ['JovanGerb', 'faenuccio', 'github-actions', 'jjdishere', 'leanprover-radar', 'mathlib-bors', 'mathlib-merge-conflicts', 'riccardobrasca', 'wwylele'] faenuccio and riccardobrasca
assignee:riccardobrasca assignee:faenuccio
6-35704
6 days ago
53-38484
53 days ago
11-64422
11 days
39388 marcelolynch
author:marcelolynch
 chore: remove @[expose] from def-free public sections Strip `@[expose]` from `public section` headers in 100 modules where no declaration needs its body visible downstream. A new sweep in the style of #38480 Found using the linter-in-progress: #39387 Relevant Zulip thread: https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/Removing.20unnecessary.20.60.40.5Bexpose.5D.60/with/595180230 100/100 Mathlib/Algebra/Category/Ring/Small.lean,Mathlib/Algebra/Field/Basic.lean,Mathlib/Algebra/Field/MinimalAxioms.lean,Mathlib/Algebra/Field/Opposite.lean,Mathlib/Algebra/Field/Rat.lean,Mathlib/Algebra/Field/ULift.lean,Mathlib/Algebra/Field/ZMod.lean,Mathlib/Algebra/Group/Action/Option.lean,Mathlib/Algebra/Group/Action/Sigma.lean,Mathlib/Algebra/Group/Action/Sum.lean,Mathlib/Algebra/Group/Action/Units.lean,Mathlib/Algebra/Group/Subgroup/Actions.lean,Mathlib/Algebra/Group/Submonoid/MulAction.lean,Mathlib/Algebra/Module/Projective.lean,Mathlib/Algebra/Module/Submodule/Basic.lean,Mathlib/Algebra/NonAssoc/LieAdmissible/Defs.lean,Mathlib/Algebra/Notation/Prod.lean,Mathlib/Algebra/Order/Floor/Div.lean,Mathlib/Algebra/Order/Group/Action/End.lean,Mathlib/Algebra/Order/Group/End.lean,Mathlib/Algebra/Order/Group/PosPart.lean,Mathlib/Algebra/Order/Kleene.lean,Mathlib/Algebra/Order/Nonneg/Lattice.lean,Mathlib/Algebra/Order/Pi.lean,Mathlib/Algebra/Order/Ring/Unbundled/Rat.lean,Mathlib/Algebra/Ring/Commute.lean,Mathlib/AlgebraicTopology/ModelCategory/Over.lean,Mathlib/Analysis/InnerProductSpace/Coalgebra.lean,Mathlib/Analysis/Normed/Algebra/TrivSqZeroExt.lean,Mathlib/Analysis/Normed/Group/Constructions.lean,Mathlib/Analysis/Normed/Module/MStructure.lean,Mathlib/Analysis/Normed/Operator/Compact/FiniteDimension.lean,Mathlib/Analysis/ODE/DiscreteGronwall.lean,Mathlib/CategoryTheory/Localization/DerivabilityStructure/OfLocalizedEquivalences.lean,Mathlib/CategoryTheory/MarkovCategory/Positive.lean,Mathlib/CategoryTheory/Monoidal/Cartesian/Normal.lean,Mathlib/CategoryTheory/Monoidal/Functor/Types.lean,Mathlib/CategoryTheory/Monoidal/Types/Coyoneda.lean,Mathlib/CategoryTheory/Sites/CoversTop/Over.lean,Mathlib/Combinatorics/Additive/FreimanHom.lean,Mathlib/Computability/AkraBazzi/AkraBazzi.lean,Mathlib/Data/ENNReal/Action.lean,Mathlib/Data/ENat/Pow.lean,Mathlib/Data/Finsupp/Pointwise.lean,Mathlib/Data/FunLike/Basic.lean,Mathlib/Data/FunLike/Embedding.lean,Mathlib/Data/FunLike/Equiv.lean,Mathlib/Data/Int/Cast/Pi.lean,Mathlib/Data/List/Monad.lean,Mathlib/Data/NNRat/Lemmas.lean,Mathlib/Data/Nat/Lattice.lean,Mathlib/Data/Prod/Lex.lean,Mathlib/Data/Rat/Cast/Defs.lean,Mathlib/Data/Rat/Cast/OfScientific.lean,Mathlib/Data/Real/Archimedean.lean,Mathlib/Data/ZMod/IntUnitsPower.lean,Mathlib/GroupTheory/GroupAction/Embedding.lean,Mathlib/GroupTheory/IsPerfect.lean,Mathlib/GroupTheory/ResiduallyFinite.lean,Mathlib/LinearAlgebra/CliffordAlgebra/Star.lean,Mathlib/LinearAlgebra/Projectivization/Action.lean,Mathlib/LinearAlgebra/RootSystem/GeckConstruction/Semisimple.lean,Mathlib/MeasureTheory/Function/L2Space.lean,Mathlib/MeasureTheory/Integral/IntegralEqImproper.lean,Mathlib/MeasureTheory/Measure/Sub.lean,Mathlib/MeasureTheory/Measure/Typeclasses/ZeroOne.lean,Mathlib/NumberTheory/ModularForms/EisensteinSeries/E2/Transform.lean,Mathlib/NumberTheory/NumberField/ExistsRamified.lean,Mathlib/NumberTheory/Padics/PadicVal/Defs.lean,Mathlib/Order/ConditionallyCompleteLattice/Basic.lean,Mathlib/Order/Filter/FilterProduct.lean,Mathlib/Order/Heyting/Basic.lean,Mathlib/Order/Interval/Set/OrdConnected.lean,Mathlib/Order/Quotient.lean,Mathlib/Probability/Kernel/Deterministic.lean,Mathlib/RingTheory/Coalgebra/Convolution.lean,Mathlib/RingTheory/Flat/IsBaseChange.lean,Mathlib/RingTheory/HopfAlgebra/TensorProduct.lean,Mathlib/RingTheory/Ideal/GoingDown.lean,Mathlib/RingTheory/Ideal/GoingUp.lean,Mathlib/RingTheory/Ideal/Maximal.lean,Mathlib/RingTheory/Localization/Finiteness.lean,Mathlib/RingTheory/Noetherian/Defs.lean,Mathlib/RingTheory/QuasiFinite/Basic.lean,Mathlib/RingTheory/QuasiFinite/Polynomial.lean,Mathlib/RingTheory/QuasiFinite/Weakly.lean,Mathlib/RingTheory/Regular/ProjectiveDimension.lean,Mathlib/RingTheory/SimpleModule/Basic.lean,Mathlib/RingTheory/Smooth/Fiber.lean,Mathlib/RingTheory/TensorProduct/IsBaseChangeRightExact.lean,Mathlib/RingTheory/Unramified/LocalRing.lean,Mathlib/RingTheory/Valuation/Extension.lean,Mathlib/RingTheory/Valuation/IsTrivialOn.lean,Mathlib/SetTheory/Cardinal/Regular.lean,Mathlib/Tactic/Algebra/Lemmas.lean,Mathlib/Topology/Algebra/UniformMulAction.lean,Mathlib/Topology/CWComplex/Classical/Subcomplex.lean,Mathlib/Topology/EMetricSpace/Pi.lean,Mathlib/Topology/List.lean,Mathlib/Topology/MetricSpace/Pseudo/Pi.lean 100 6 ['eric-wieser', 'github-actions', 'grunweg', 'marcelolynch', 'urkud'] nobody
6-33897
6 days ago
8-11666
8 days ago
8-11377
8 days
39323 lecopivo
author:lecopivo
 feat: fun_prop for integrability setting up fun_prop with integrability --- - [ ] depends on: #39370 - [ ] depends on: #39371 - [ ] depends on: #39325 - [ ] depends on: #39329 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) WIP blocked-by-other-PR merge-conflict 1713/55 Mathlib.lean,Mathlib/Analysis/Distribution/SchwartzSpace/Basic.lean,Mathlib/MeasureTheory/Function/L1Space/AEEqFun.lean,Mathlib/MeasureTheory/Function/L1Space/Integrable.lean,Mathlib/MeasureTheory/Function/LocallyIntegrable.lean,Mathlib/MeasureTheory/Integral/IntegrableOn.lean,Mathlib/MeasureTheory/Integral/IntegrableOnFunProp.lean,Mathlib/MeasureTheory/Integral/LocallyIntegrableOnFunProp.lean,Mathlib/MeasureTheory/Integral/Prod.lean,Mathlib/Tactic.lean,Mathlib/Tactic/Common.lean,Mathlib/Tactic/FunProp/Attr.lean,Mathlib/Tactic/FunProp/Core.lean,Mathlib/Tactic/FunProp/Decl.lean,Mathlib/Tactic/GrindAttrs.lean,Mathlib/Tactic/RunAutoParam.lean,Mathlib/Topology/Basic.lean,Mathlib/Topology/Closure.lean,Mathlib/Topology/Compactness/Compact.lean,Mathlib/Topology/MetricSpace/Bounded.lean,Mathlib/Topology/MetricSpace/ProperSpace.lean,Mathlib/Topology/Order/Compact.lean,Mathlib/Topology/Order/OrderClosed.lean,Mathlib/Topology/Separation/Basic.lean,Mathlib/Topology/Separation/Hausdorff.lean,MathlibTest/Compactness.lean,MathlibTest/FunProp.lean,MathlibTest/FunPropMinimal.lean,MathlibTest/IntegrabilityTactic.lean,MathlibTest/RunAutoParam.lean,scripts/README.md,scripts/update-integrability-tactic-counts.sh 32 6 ['github-actions', 'mathlib-bors', 'mathlib-dependent-issues', 'mathlib-merge-conflicts'] nobody
6-33573
6 days ago
9-5660
9 days ago
0-1508
25 minutes
39368 gasparattila
author:gasparattila
 feat: homogenization of an affine space --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra
label:t-algebra$
 401/0 Mathlib.lean,Mathlib/LinearAlgebra/AffineSpace/Homogenization.lean,docs/references.bib 3 15 ['eric-wieser', 'gasparattila', 'github-actions'] nobody
6-31063
6 days ago
8-22569
8 days ago
8-23482
8 days
35683 gasparattila
author:gasparattila
 fix(Tactic/FunProp): detect `Continuous.subtype_mk` as compositional This PR changes `fun_prop` to detect some theorems involving dependent types, such as `Continuous.subtype_mk` to be in compositional form. This lets `fun_prop` solve goals such as `Continuous fun x => (⟨x, trivial⟩ : {x : ℝ // True})`. --- These theorems become compositional: `Continuous.subtype_mk`, `Topology.IsEmbedding.inclusion`, `Topology.IsOpenEmbedding.inclusion`, `Topology.IsClosedEmbedding.inclusion`, `Measurable.subtype_mk`, `Measurable.imp`, `Path.symm_continuous_family`, `Continuous.upperHalfPlaneMk` These theorems become simple: `hasFDerivAt_prodMk_left`, `hasFDerivAt_prodMk_right`, `contDiff_prodMk_left`, `contDiff_prodMk_right` [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-meta maintainer-merge 66/44 Mathlib/Tactic/FunProp/Core.lean,Mathlib/Tactic/FunProp/FunctionData.lean,Mathlib/Tactic/FunProp/Theorems.lean,Mathlib/Topology/Homeomorph/Lemmas.lean,MathlibTest/FunPropMinimal.lean 5 27 ['gasparattila', 'github-actions', 'grunweg', 'joneugster', 'lecopivo', 'mathlib-merge-conflicts'] joneugster
assignee:joneugster
6-30444
6 days ago
6-30515
6 days ago
86-35794
86 days
39110 SnirBroshi
author:SnirBroshi
 chore(Data/Set): reduce defeq abuse of `Set α = α → Prop` These are among the first places that would fail if `Set α` wasn't defeq to `α → Prop`. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-data 35/20 Mathlib/Data/Set/Basic.lean,Mathlib/Data/Set/Defs.lean,Mathlib/Data/Set/Insert.lean,Mathlib/Data/Set/Prod.lean,Mathlib/Order/BooleanAlgebra/Set.lean 5 24 ['SnirBroshi', 'Vierkantor', 'github-actions', 'leanprover-radar', 'mathlib-bors', 'themathqueen', 'urkud', 'vihdzp'] nobody
6-29469
6 days ago
6-44420
6 days ago
12-45531
12 days
39457 SnirBroshi
author:SnirBroshi
 feat(LinearAlgebra/Matrix/Defs): lift more algebraic classes --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra
label:t-algebra$
 52/4 Mathlib/Algebra/Group/Pi/Basic.lean,Mathlib/Algebra/Group/Prod.lean,Mathlib/LinearAlgebra/Matrix/Defs.lean 3 4 ['eric-wieser', 'github-actions', 'leanprover-radar', 'urkud'] nobody
6-24730
6 days ago
6-33840
6 days ago
6-58078
6 days
30526 SnirBroshi
author:SnirBroshi
 chore(Logic/Relation): use `≤` to spell subrelation Replace every `∀ x y, r x y → r' x y` with `r ≤ r'` --- NOTE: this PR began as an effort to use `Subrelation` since `≤` wasn't available in this file, but it was agreed on [Zulip](https://leanprover.zulipchat.com/#narrow/channel/144837-PR-reviews/topic/.2330526.20use.20Subrelation.20in.20Mathlib.2ELogic.2ERelation/with/546572676) to instead make `≤` available there. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-logic 146/133 Mathlib.lean,Mathlib/CategoryTheory/Action.lean,Mathlib/CategoryTheory/ConnectedComponents.lean,Mathlib/CategoryTheory/Filtered/Connected.lean,Mathlib/CategoryTheory/IsConnected.lean,Mathlib/CategoryTheory/Limits/Final.lean,Mathlib/CategoryTheory/Limits/Types/Coequalizers.lean,Mathlib/CategoryTheory/Limits/Types/Filtered.lean,Mathlib/Combinatorics/Enumerative/DyckWord.lean,Mathlib/Combinatorics/SimpleGraph/Connectivity/Connected.lean,Mathlib/Computability/ContextFreeGrammar.lean,Mathlib/Computability/TuringMachine/Config.lean,Mathlib/GroupTheory/FreeGroup/Basic.lean,Mathlib/Logic/Relation.lean,Mathlib/Order/Basic.lean,Mathlib/Order/Defs/Prop.lean,Mathlib/Order/Interval/Finset/Basic.lean,Mathlib/Order/WellFoundedSet.lean,Mathlib/Topology/Gluing.lean 19 22 ['SnirBroshi', 'Vierkantor', 'eric-wieser', 'github-actions', 'joneugster', 'mathlib-merge-conflicts', 'mathlib4-merge-conflict-bot', 'thorimur', 'vihdzp'] Vierkantor and joneugster
assignee:Vierkantor assignee:joneugster
6-22248
6 days ago
6-22392
6 days ago
88-55068
88 days
38551 TTony2019
author:TTony2019
 feat(Analysis/Convex/Intrinsic): add `affineSpan_prod_eq` and `intrinsicInterior_prod_eq` ### Summary We prove that the affine span of a product set equals the product of the affine spans, and that the intrinsic interior of a product set equals the product of the intrinsic interiors. - `affineSpan_prod_eq`: for `s : Set P₁` and `t : Set P₂`, `affineSpan k (s ×ˢ t) = (affineSpan k s) ×ˢ (affineSpan k t)` as sets. - `intrinsicInterior_prod_eq`: for `s : Set P` and `t : Set Q`, `intrinsicInterior 𝕜 (s ×ˢ t) = intrinsicInterior 𝕜 s ×ˢ intrinsicInterior 𝕜 t`. These two theorems are added to `Mathlib/LinearAlgebra/AffineSpace/AffineSubspace/Basic.lean` and `Mathlib/Analysis/Convex/Intrinsic.lean`. ### Collaboration Co-authored-by: @imathwy new-contributor 144/0 Mathlib/Algebra/AddTorsor/Basic.lean,Mathlib/Algebra/Group/Pointwise/Set/Basic.lean,Mathlib/Analysis/Convex/Intrinsic.lean,Mathlib/LinearAlgebra/AffineSpace/AffineSubspace/Basic.lean,Mathlib/LinearAlgebra/Prod.lean 5 22 ['TTony2019', 'github-actions', 'wwylele'] nobody
6-21381
6 days ago
23-70147
23 days ago
26-13731
26 days
32583 MJ141592
author:MJ141592
 refactor(SimpleGraph): change bridges not to require the edge to be present Remove the requirement for edges to exist in definition of isBridge, and then change the related lemmas to adjust for this, by renaming, fixing the statements and fixing the proofs, including in Acyclic. Closes #31690. --- - [x] depends on: #36802 - [x] depends on: #36804 t-combinatorics new-contributor 95/93 Mathlib/Combinatorics/SimpleGraph/Acyclic.lean,Mathlib/Combinatorics/SimpleGraph/Connectivity/Connected.lean,Mathlib/Combinatorics/SimpleGraph/Connectivity/EdgeConnectivity.lean,Mathlib/Combinatorics/SimpleGraph/DeleteEdges.lean,Mathlib/Combinatorics/SimpleGraph/Hamiltonian.lean 5 47 ['MJ141592', 'Rida-Hamadani', 'SnirBroshi', 'YaelDillies', 'b-mehta', 'github-actions', 'mathlib-dependent-issues', 'mathlib-merge-conflicts', 'mathlib4-merge-conflict-bot'] nobody
6-18068
6 days ago
6-19614
6 days ago
48-79568
48 days
36845 grunweg
author:grunweg
 feat: the Levi-Civita connection on a manifold --- - [ ] depends on: #36299 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-differential-geometry blocked-by-other-PR merge-conflict 1162/0 Mathlib.lean,Mathlib/Geometry/Manifold/MFDeriv/SpecificFunctions.lean,Mathlib/Geometry/Manifold/VectorBundle/CovariantDerivative/LeviCivita.lean,Mathlib/Geometry/Manifold/VectorBundle/CovariantDerivative/Metric.lean 4 3 ['github-actions', 'mathlib-dependent-issues', 'mathlib-merge-conflicts'] nobody
6-17416
6 days ago
64-44508
64 days ago
0-512
8 minutes
35287 arnoudvanderleer
author:arnoudvanderleer
 feat(AlgebraicTopology/SimplicialSet): define isomorphisms in simplicial sets, and the coherent isomorphism simplicial set show that any edge in a simplicial set, that is the image of the forward edge of the coherent isomorphism under a simplicial set morphism, is an isomorphism. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebraic-topology new-contributor infinity-cosmos awaiting-author 362/3 Mathlib.lean,Mathlib/AlgebraicTopology/SimplicialSet/CoherentIso.lean,Mathlib/AlgebraicTopology/SimplicialSet/CompStruct.lean,Mathlib/AlgebraicTopology/SimplicialSet/NerveCodiscrete.lean,Mathlib/AlgebraicTopology/SimplicialSet/StdSimplex.lean,Mathlib/CategoryTheory/CodiscreteCategory.lean 6 122 ['arnoudvanderleer', 'dagurtomas', 'github-actions', 'joelriou', 'mathlib-merge-conflicts', 'robin-carlier'] robin-carlier
assignee:robin-carlier
6-16555
6 days ago
6-16555
6 days ago
31-932
31 days
39122 justus-springer
author:justus-springer
 feat(AlgebraicGeometry/Birational): Birationality and rationality of schemes This is a first step (of hopefully many) towards some basic birational geometry. This PR adds `Birational/Birational.lean`, which defines predicates `Birational`, `BirationalOver` and `IsRationalOver` for arbitrary schemes and provides basic API (e.g. that they are equivalence relations, and that affine space is rational). Some notes on the choice of definitions: There are multiple ways to define what it means for two schemes to be birational to each other. A common one is: "There exists a rational map with a rational inverse". However, this would require defining composition of rational maps, which is not always defined (In order to compose `f : X ⤏ Y` with `g : Y ⤏ Z`, you need at least `X` preirreducible, `Y` nonempty and `f` dominant). On the other hand, I can define "There exist dense subsets `U : Opens X` and `V : Opens Y` such that `U ≅ V` as schemes" for any two schemes `X` and `Y`, with no conditions. Hence I chose that as a definition. I'm also working on defining composition of rational maps, and once that's done, there should be a theorem connecting the two definitions. For now, I've defined `IsRationalOver S X` to mean there exists a `n : Type 0` such that `X` is birational to `𝔸(n; S)`. I fixed the universe of `n` to avoid bad universe levels in the type of `IsRationalOver`. At least I wasn't able to find a way to make this universe polymorphic and make the linter happy, but maybe there is a way. All references on birational geometry I could find just work with finite-dimensional varieties anyway, which would fit in `Type 0`. - [x] depends on: #39316 --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebraic-geometry 302/0 Mathlib.lean,Mathlib/AlgebraicGeometry/Birational/Birational.lean,Mathlib/AlgebraicGeometry/Restrict.lean 3 11 ['chrisflav', 'erdOne', 'github-actions', 'justus-springer', 'mathlib-dependent-issues'] joelriou
assignee:joelriou
6-14570
6 days ago
9-5374
9 days ago
12-12238
12 days
39472 NoahW314
author:NoahW314
 feat(RingTheory/MvPolynomial/Homogeneous): add homogeneous lemmas --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-ring-theory large-import 74/2 Mathlib/Data/Finsupp/Weight.lean,Mathlib/RingTheory/MvPolynomial/Homogeneous.lean,Mathlib/RingTheory/MvPolynomial/WeightedHomogeneous.lean 3 1 ['github-actions'] nobody
6-10112
6 days ago
6-10182
6 days ago
6-10087
6 days
39479 wwylele
author:wwylele
 chore(RingTheory/HahnSeries): remove a defeq abuse Previously the simp implicitly uses `⟨⟨((↑) : ℕ → Γ),...⟩,...⟩.toFun = (↑)`. This explicitly writes out the intermediate term so the it no longer relies on defeq. Also changed the statement of ofPowerSeries_apply to reuse existing embedding --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-ring-theory tech debt 9/12 Mathlib/RingTheory/HahnSeries/PowerSeries.lean,Mathlib/RingTheory/LaurentSeries.lean 2 1 ['github-actions'] nobody
6-5702
6 days ago
6-5778
6 days ago
6-5597
6 days
39161 alreadydone
author:alreadydone
 feat(LinearAlgebra): commutative semirings satisfy strong rank condition Co-authored-by: Aristotle (Harmonic) Thanks to ChatGPT and Gemini for converting part of Yi-Jia Tan's paper into LaTeX, which served as solutions provided to Aristotle. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) WIP t-algebra LLM-generated
label:t-algebra$
 616/0 Mathlib.lean,Mathlib/LinearAlgebra/Matrix/Nonsingular.lean,docs/references.bib 3 3 ['SnirBroshi', 'github-actions'] nobody
6-4469
6 days ago
11-71224
11 days ago
0-3
3 seconds
7873 astrainfinita
author:astrainfinita
 perf: reorder `extends` and change instance priority in algebra hierarchy There are no strict rules, but in general `Cancel` is dropped first, then `Comm`, then `Neg / Inv`, then `Assoc`. Not sure if there's a better way. An important goal is to search for `Zero/One/Add/Mul` instances first along `Zero/One/Add/Mul` -> ... -> `Ring` -> `CommRing` -> `Field`. --- - [ ] depends on: #14712 - [x] depends on: #16638 - [ ] depends on: #18464 - [ ] depends on: #18468 - [ ] depends on: #18470 - [ ] depends on: #18472 - [ ] depends on: #18474 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict slow-typeclass-synthesis t-algebra blocked-by-other-PR
label:t-algebra$
 494/204 Archive/Imo/Imo1998Q2.lean,Mathlib/Algebra/Algebra/Hom.lean,Mathlib/Algebra/Associated.lean,Mathlib/Algebra/BigOperators/Ring/List.lean,Mathlib/Algebra/Category/ModuleCat/Presheaf/Limits.lean,Mathlib/Algebra/DirectSum/Algebra.lean,Mathlib/Algebra/DirectSum/Internal.lean,Mathlib/Algebra/EuclideanDomain/Defs.lean,Mathlib/Algebra/EuclideanDomain/Field.lean,Mathlib/Algebra/Field/Basic.lean,Mathlib/Algebra/Field/Defs.lean,Mathlib/Algebra/Field/IsField.lean,Mathlib/Algebra/GCDMonoid/Basic.lean,Mathlib/Algebra/Group/Defs.lean,Mathlib/Algebra/Group/Ext.lean,Mathlib/Algebra/Group/InjSurj.lean,Mathlib/Algebra/Group/Opposite.lean,Mathlib/Algebra/Group/Prod.lean,Mathlib/Algebra/GroupWithZero/Basic.lean,Mathlib/Algebra/GroupWithZero/Defs.lean,Mathlib/Algebra/GroupWithZero/InjSurj.lean,Mathlib/Algebra/GroupWithZero/Prod.lean,Mathlib/Algebra/GroupWithZero/Semiconj.lean,Mathlib/Algebra/GroupWithZero/Units/Basic.lean,Mathlib/Algebra/Homology/Embedding/Basic.lean,Mathlib/Algebra/Homology/HomotopyCategory/DegreewiseSplit.lean,Mathlib/Algebra/Homology/HomotopyCategory/ShiftSequence.lean,Mathlib/Algebra/Lie/Basic.lean,Mathlib/Algebra/MonoidAlgebra/Grading.lean,Mathlib/Algebra/Order/AddGroupWithTop.lean,Mathlib/Algebra/Order/Field/Canonical/Defs.lean,Mathlib/Algebra/Order/Field/Defs.lean,Mathlib/Algebra/Order/Group/Abs.lean,Mathlib/Algebra/Order/Group/Defs.lean,Mathlib/Algebra/Order/GroupWithZero/Canonical.lean,Mathlib/Algebra/Order/Kleene.lean,Mathlib/Algebra/Order/Monoid/Defs.lean,Mathlib/Algebra/Order/Ring/Canonical.lean,Mathlib/Algebra/Order/Ring/Defs.lean,Mathlib/Algebra/Polynomial/Roots.lean,Mathlib/Algebra/Quaternion.lean,Mathlib/Algebra/Ring/BooleanRing.lean,Mathlib/Algebra/Ring/Defs.lean,Mathlib/Algebra/Ring/Ext.lean,Mathlib/Algebra/Ring/InjSurj.lean,Mathlib/Algebra/Ring/Rat.lean,Mathlib/Algebra/Tropical/Basic.lean,Mathlib/Analysis/Fourier/FourierTransformDeriv.lean,Mathlib/Analysis/InnerProductSpace/Orientation.lean,Mathlib/Analysis/InnerProductSpace/Symmetric.lean,Mathlib/Analysis/Normed/Field/Basic.lean,Mathlib/Analysis/Normed/Group/Basic.lean,Mathlib/Analysis/NormedSpace/Star/Multiplier.lean,Mathlib/CategoryTheory/Preadditive/FunctorCategory.lean,Mathlib/CategoryTheory/Preadditive/SingleObj.lean,Mathlib/CategoryTheory/Triangulated/Functor.lean,Mathlib/Data/Finset/NoncommProd.lean,Mathlib/Data/Int/Cast/Defs.lean,Mathlib/Data/Nat/Cast/Defs.lean,Mathlib/Data/Nat/Choose/Multinomial.lean,Mathlib/Data/Num/Lemmas.lean,Mathlib/Data/Rat/Denumerable.lean,Mathlib/Data/Real/ENatENNReal.lean,Mathlib/Dynamics/Ergodic/AddCircle.lean,Mathlib/FieldTheory/KummerExtension.lean,Mathlib/GroupTheory/Congruence/Basic.lean,Mathlib/GroupTheory/MonoidLocalization.lean,Mathlib/GroupTheory/SpecificGroups/Alternating.lean,Mathlib/GroupTheory/Torsion.lean,Mathlib/Init/ZeroOne.lean,Mathlib/LinearAlgebra/LinearPMap.lean,Mathlib/LinearAlgebra/Orientation.lean,Mathlib/LinearAlgebra/QuadraticForm/Basic.lean,Mathlib/LinearAlgebra/TensorPower.lean,Mathlib/LinearAlgebra/TensorProduct/Basic.lean,Mathlib/LinearAlgebra/TensorProduct/Graded/External.lean,Mathlib/MeasureTheory/Decomposition/Jordan.lean,Mathlib/MeasureTheory/Decomposition/SignedLebesgue.lean,Mathlib/NumberTheory/ArithmeticFunction.lean,Mathlib/NumberTheory/LegendreSymbol/GaussEisensteinLemmas.lean,Mathlib/NumberTheory/RamificationInertia.lean,Mathlib/NumberTheory/WellApproximable.lean,Mathlib/NumberTheory/Zsqrtd/QuadraticReciprocity.lean,Mathlib/Order/Filter/Germ.lean,Mathlib/Order/Interval/Finset/Box.lean,Mathlib/RingTheory/Bialgebra/Hom.lean,Mathlib/RingTheory/Coalgebra/Hom.lean,Mathlib/RingTheory/DiscreteValuationRing/Basic.lean,Mathlib/RingTheory/Filtration.lean,Mathlib/RingTheory/Henselian.lean,Mathlib/RingTheory/Ideal/IsPrincipal.lean,Mathlib/RingTheory/Ideal/LocalRing.lean,Mathlib/RingTheory/Ideal/Norm.lean,Mathlib/RingTheory/Localization/Integral.lean,Mathlib/RingTheory/MvPolynomial/Symmetric.lean,Mathlib/RingTheory/TensorProduct/Basic.lean,Mathlib/RingTheory/TensorProduct/MvPolynomial.lean,Mathlib/RingTheory/UniqueFactorizationDomain.lean,Mathlib/RingTheory/Valuation/ValuationSubring.lean,Mathlib/Tactic/Positivity/Core.lean 104 84 ['MichaelStollBayreuth', 'astrainfinita', 'github-actions', 'kim-em', 'leanprover-bot', 'mattrobball'] nobody
6-2563
6 days ago
678-16174
678 days ago
3-36575
3 days
39473 faenuccio
author:faenuccio
 feat(Topology.Homeomorph.Lemmas): add lemmas about `coe` and `IsHomeomorph` Add lemmas `IsHomeomorph.coe_equiv` and `IsHomeomorph.coe_inv` --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-topology 7/1 Mathlib/Topology/Homeomorph/Lemmas.lean 1 2 ['ADedecker', 'github-actions'] ADedecker
assignee:ADedecker
5-85687
5 days ago
6-9671
6 days ago
6-9382
6 days
39449 Paul-Lez
author:Paul-Lez
 doc: add library note about scoping simp lemmas with weak keys In PR #39262 I noticed that some `simp` lemmas were scoped for a reason that is not immediately obvious, so I figured that adding a library note would be nice in case anyone else runs into this in the future (this pattern is quite common in Mathlib!) In case it's helpful for review, here are links to a few of the PRs that added this scoping initially: - #14233 - #15620 - #15631 --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) 71/4 Mathlib.lean,Mathlib/Algebra/AddConstMap/Basic.lean,Mathlib/Algebra/CharP/Two.lean,Mathlib/Algebra/GradedMonoid.lean,Mathlib/Algebra/Ring/BooleanRing.lean,Mathlib/Algebra/Ring/CharZero.lean,Mathlib/Tactic.lean,Mathlib/Tactic/SimpLibraryNote.lean 8 1 ['github-actions'] nobody
5-81415
5 days ago
5-81483
5 days ago
5-81766
5 days
38911 Vierkantor
author:Vierkantor
 chore(Tactic): deprecate `substs` and replace it with `subst` The `substs` tactic was a wrapper around `subst` to call it multiple times for different hypotheses. But `subst` now supports multiple hypotheses, so we can deprecate `substs` and replace it with `subst`. I added a deprecation warning using a `Try this:` message. Spotted while checking tactic docstrings. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-meta delegated 46/42 Archive/Examples/IfNormalization/WithoutAesop.lean,Mathlib/Algebra/Homology/DifferentialObject.lean,Mathlib/Algebra/Homology/HomologicalComplex.lean,Mathlib/Algebra/Homology/HomotopyCategory/HomComplex.lean,Mathlib/AlgebraicGeometry/StructureSheaf.lean,Mathlib/AlgebraicTopology/ExtraDegeneracy.lean,Mathlib/Analysis/Calculus/FDeriv/Comp.lean,Mathlib/CategoryTheory/Preadditive/Mat.lean,Mathlib/Computability/DFA.lean,Mathlib/Data/Analysis/Filter.lean,Mathlib/Data/Finset/Sort.lean,Mathlib/Data/List/Sigma.lean,Mathlib/Data/WSeq/Basic.lean,Mathlib/Geometry/RingedSpace/Stalks.lean,Mathlib/LinearAlgebra/Alternating/DomCoprod.lean,Mathlib/Logic/Equiv/Defs.lean,Mathlib/Logic/Equiv/PartialEquiv.lean,Mathlib/Order/Concept.lean,Mathlib/Order/JordanHolder.lean,Mathlib/SetTheory/Ordinal/Notation.lean,Mathlib/Tactic/Substs.lean,Mathlib/Topology/Gluing.lean 22 17 ['JovanGerb', 'Vierkantor', 'bryangingechen', 'github-actions', 'grunweg', 'j-loreaux', 'mathlib-bors', 'plp127'] thorimur
assignee:thorimur
5-79638
5 days ago
12-79991
12 days ago
5-44109
5 days
39333 lecopivo
author:lecopivo
 feat(run_auto_param): tactic to run autoParam tactic Tactic `run_auto_param` is designed to solve goals in the form `autoParam P tac` by executing tactic `tac` on the goal `P`. It is mainly meant to be used as a discharger for other tactics like `simp` or `fun_prop`. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-meta 97/0 Mathlib.lean,Mathlib/Tactic.lean,Mathlib/Tactic/RunAutoParam.lean,MathlibTest/RunAutoParam.lean 4 8 ['JovanGerb', 'fpvandoorn', 'github-actions', 'lecopivo'] JovanGerb
assignee:JovanGerb
5-79131
5 days ago
7-7147
7 days ago
0-602
10 minutes
39460 Deicyde
author:Deicyde
 feat(Algebra/Module/ZLattice): Quotient by `IsZLattice` is group isomorphic to `UnitAddTorus` The main result `quotientAddEquivUnitAddTorus` constructs an isomorphism `(E ⧸ L) ≃+ UnitAddTorus ι` for any `IsZLattice ℝ L`. Currently left as a draft for educational purpose. See the Zulip thread [#mathlib4 > What Is A Torus?](https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/What.20Is.20A.20Torus.3F/with/595553420) for more discussion. --- - [ ] depends on: #39452 - [ ] depends on: #39453 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor blocked-by-other-PR 67/6 Mathlib.lean,Mathlib/Algebra/Module/ZLattice/Torus.lean,Mathlib/Analysis/Fourier/AddCircleMulti.lean,Mathlib/RingTheory/Ideal/Operations.lean,Mathlib/Topology/Instances/AddCircle/Real.lean 5 3 ['github-actions', 'mathlib-dependent-issues'] nobody
5-75351
5 days ago
unknown
0-0
0 seconds
38227 vihdzp
author:vihdzp
 chore(Algebra/Order/Monoid/Unbundled/Basic): golfing + formatting We make use of `variable`, fix some weird spacing, and golf many proofs. The only breaking change is that `mul_lt_iff_lt_one_left'`/`add_lt_iff_neg_left` now takes an explicit argument, matching the theorems surrounding it. --- Not too fond of the `calc` tactic. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra t-order
label:t-algebra$
 233/501 Mathlib/Algebra/Order/Monoid/Unbundled/Basic.lean,Mathlib/Data/Real/Archimedean.lean 2 2 ['github-actions', 'mathlib-merge-conflicts'] nobody
5-75034
5 days ago
5-75094
5 days ago
6-2850
6 days
32828 Hagb
author:Hagb
 feat(Algebra/Order/Group/Defs): add `IsOrderedAddMonoid.toIsOrderedCancelAddMonoid'` It is similar to `IsOrderedAddMonoid.toIsOrderedCancelAddMonoid`, while with different hypotheses. The conclusion `IsOrderedCancelMonoid α` on `IsOrderedAddMonoid.toIsOrderedCancelAddMonoid` still holds when the hypothesis `CommGroup α` is weakened to `CancelCommMonoid α` while `PartialOrder α` is strengthened to `LinearOrder α`. --- [`IsOrderedAddMonoid.toIsOrderedCancelAddMonoid`](https://leanprover-community.github.io/mathlib4_docs/find/?pattern=IsOrderedAddMonoid.toIsOrderedCancelAddMonoid#doc) and `IsOrderedAddMonoid.toIsOrderedCancelAddMonoid'`: https://github.com/leanprover-community/mathlib4/blob/97f78b1a4311fed1844b94f1c069219a48a098e1/Mathlib/Algebra/Order/Group/Defs.lean#L52-L62 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) awaiting-zulip t-algebra awaiting-author
label:t-algebra$
 4/0 Mathlib/Algebra/Order/Group/Defs.lean 1 15 ['Garmelon', 'Hagb', 'Vierkantor', 'artie2000', 'dagurtomas', 'github-actions', 'leanprover-radar'] eric-wieser
assignee:eric-wieser
5-72743
5 days ago
120-22766
120 days ago
40-42357
40 days
33143 wwylele
author:wwylele
 feat(PowerSeries): pentagonal number theorem The proof is split in two files: `Mathlib/Topology/Algebra/InfiniteSum/Pentagonal.lean` for the algebraic part, and `Mathlib/RingTheory/PowerSeries/Pentagonal.lean` for the summability part. In the near future, I also plan to prove the real/complex version that branches off from the algebraic part. --- - [x] depends on: #30436 - [x] depends on: #38179 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra large-import
label:t-algebra$
 361/6 Mathlib.lean,Mathlib/Combinatorics/Enumerative/Pentagonal.lean,Mathlib/RingTheory/PowerSeries/Pentagonal.lean,Mathlib/Topology/Algebra/InfiniteSum/Pentagonal.lean,docs/1000.yaml 5 59 ['copilot-pull-request-reviewer', 'github-actions', 'jcommelin', 'mathlib-dependent-issues', 'tb65536', 'urkud', 'vihdzp', 'wwylele'] chrisflav
assignee:chrisflav
5-71708
5 days ago
20-77212
20 days ago
131-2380
131 days
37720 cjrl
author:cjrl
 feat(Data/Fintype/Card): existsUnique_notMem_image_of_injective_of_card_succ This pull requests adds a small theorem `existsUnique_notMem_image_of_injective_of_card_succ` to `Mathlib/Data/Fintype/Card` that says given an injective map f : α → β such that β has cardinality one more than α, there exists a unique element of β not in the image of f. This can be viewed as going in the opposite direction of `card_lt_of_injective_of_notMem`. This little fact is needed for our Latin Square PR #36698. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-data new-contributor t-set-theory 19/0 Mathlib/Data/Finset/Card.lean,Mathlib/Data/Fintype/Card.lean 2 10 ['IvanRenison', 'cjrl', 'dagurtomas', 'ghseeli', 'github-actions'] nobody
5-71161
5 days ago
5-71161
5 days ago
43-41728
43 days
35197 j-loreaux
author:j-loreaux
 feat: Hölder framework for `lp` spaces --- - [ ] depends on: #35152 - [ ] depends on: #35198 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-analysis 311/9 Mathlib.lean,Mathlib/Analysis/Normed/Lp/LpEquiv.lean,Mathlib/Analysis/Normed/Lp/lpHolder.lean,Mathlib/Analysis/Normed/Lp/lpSpace.lean,Mathlib/Analysis/Normed/Operator/Basic.lean,Mathlib/Tactic/Linter/TextBased.lean 6 13 ['github-actions', 'j-loreaux', 'mathlib-dependent-issues', 'mathlib-merge-conflicts', 'mcdoll', 'mike1729', 'themathqueen'] themathqueen
assignee:themathqueen
5-69449
5 days ago
29-18424
29 days ago
48-20914
48 days
32829 Hagb
author:Hagb
 feat(Data/Finsupp/MonomialOrder): weaken `IsOrderedCancelAddMonoid` to `IsOrderedAddMonoid` `IsOrderedCancelAddMonoid syn` (`.iocam`) can be obtained from `IsOrderedAddMonoid syn` and other fields. --- - [ ] depends on: #32828 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) blocked-by-other-PR t-order 11/2 Mathlib/Algebra/Order/Group/Defs.lean,Mathlib/Data/Finsupp/MonomialOrder.lean 2 9 ['Hagb', 'Vierkantor', 'github-actions', 'mathlib4-dependent-issues-bot', 'vihdzp'] nobody
5-66966
5 days ago
160-63596
160 days ago
0-137
2 minutes
39214 Hagb
author:Hagb
 refactor(Data/Finsupp/MonomialOrder): remove `.wf` (well foundedness) field from `MonomialOrder` Many properties still hold without the well-foundedness. Although Gröbner basis theory requires the monomial order to be well founded for the termination of the division algorithm (formalized in `MonomialOrder.div`), many properties that don't relay on the division or remainder still hold without the well-foundedness. Even the division algorithm can terminate in some cases where the monomial order isn't well founded. For example, if the divisors set is finite, then the algorithm can terminate w.r.t. `MonomialOrder.lex (σ := Nat)` even though it isn't well founded. Such cases cannot be directly stated if the formalization of monomial order requires well-foundedness. Deletions: - MonomialOrder.wf --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-ring-theory 21/13 Mathlib/Data/Finsupp/MonomialOrder.lean,Mathlib/Data/Finsupp/MonomialOrder/DegLex.lean,Mathlib/RingTheory/MvPolynomial/Groebner.lean,Mathlib/RingTheory/MvPolynomial/MonomialOrder/DegLex.lean 4 4 ['Hagb', 'github-actions', 'vihdzp'] nobody
5-66873
5 days ago
11-16502
11 days ago
11-16213
11 days
38536 CoolRmal
author:CoolRmal
 feat: a lemma about the symmetric difference of unions Created with the help of Codex. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-data easy delegated 58/2 Mathlib/Data/Set/Lattice.lean,Mathlib/Order/CompleteBooleanAlgebra.lean 2 17 ['CoolRmal', 'SnirBroshi', 'eric-wieser', 'github-actions', 'mathlib-bors', 'ocfnash'] nobody
5-65533
5 days ago
8-12922
8 days ago
7-75625
7 days
39443 justus-springer
author:justus-springer
 feat(Data/Set/Image): `nonempty_preimage_iff` Basically a converse to `nonempty_of_nonempty_preimage`. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-data 4/0 Mathlib/Data/Set/Image.lean 1 4 ['Paul-Lez', 'github-actions', 'justus-springer', 'urkud'] nobody
5-53262
5 days ago
6-84439
6 days ago
6-84150
6 days
33392 AntoineChambert-Loir
author:AntoineChambert-Loir
 feat(LinearAlgebra/Transvection/Generation): non-exceptional case in Dieudonné's theorem We prove the theorem of [Dieudonné-1955][J. Dieudonné, “Sur les générateurs des groupes classiques”]. Let `K` be a division ring and `V` be a `K`-module. * `LinearEquiv.mem_transvections_pow_mul_dilatransvections_of_fixedReduce_eq_one`: If `e.fixedReduce = 1`, then `e` can be written as the product of `finrank K (V ⧸ e.fixedSubmodule) - 1` transvections and one dilatransvection. This is the first part of the non-exceptional case in Dieudonné's theorem. (This statement is not interesting when `e = 1`.) * `LinearEquiv.mem_transvections_pow_mul_dilatransvections_of_fixedReduce_ne_smul_id`: If `e.fixedReduce` is not a homothety, then `e` can be written as the product of `finrank K (V ⧸ e.fixedSubmodule) - 1` transvections and one dilatransvection. This is the second part of the non-exceptional case in Dieudonné's theorem. * `LinearEquiv.IsExceptional`: A linear equivalence `e : V ≃ₗ[K] V` is exceptional if `1 < finrank K (V ⧸ e.fixedSubmodule)` and if `e.fixedReduce` is a nontrivial homothety. * `LinearEquiv.mem_dilatransvections_pow_of_notIsExceptional`: This is the non-exceptional case in Dieudonné's theorem, as a combination of the two preceding statements. --- - [x] depends on: #33348 - [x] depends on: #33282 - [x] depends on: #33347 - [ ] depends on: #33387 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra
label:t-algebra$
 551/0 Mathlib.lean,Mathlib/LinearAlgebra/Center.lean,Mathlib/LinearAlgebra/LinearIndependent/Lemmas.lean,Mathlib/LinearAlgebra/Transvection/Generation.lean 4 16 ['AntoineChambert-Loir', 'dagurtomas', 'github-actions', 'mathlib-dependent-issues', 'mathlib-merge-conflicts', 'mathlib4-merge-conflict-bot'] joelriou
assignee:joelriou
5-49792
5 days ago
5-49860
5 days ago
53-2019
53 days
38200 Parcly-Taxel
author:Parcly-Taxel
 feat: Turán numbers and their strict monotonicity `strictMonoOn_turanNumber` was initially proved by @Aristotle-Harmonic, then hand-polished. Co-authored-by: Aristotle (Harmonic) t-combinatorics 45/20 Mathlib/Combinatorics/SimpleGraph/Extremal/Turan.lean 1 3 ['Parcly-Taxel', 'github-actions', 'tb65536'] nobody
5-48767
5 days ago
5-79670
5 days ago
34-47727
34 days
30351 JLimperg
author:JLimperg
 [Not a PR] Benchmark Aesop's lazy forward state construction Testing the performance impact of an Aesop change. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict dependency-bump 3/3 lake-manifest.json,lakefile.lean 2 11 ['JLimperg', 'github-actions', 'leanprover-bot', 'mathlib4-merge-conflict-bot', 'niro4-1'] nobody
5-43905
5 days ago
unknown
0-0
0 seconds
38427 mckoen
author:mckoen
 feat(AlgebraicTopology/SimplicialSet): strong inner anodyne morphisms Defines strong inner anodyne morphisms, WIP --- - [ ] depends on: #37869 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebraic-topology WIP merge-conflict 267/0 Mathlib.lean,Mathlib/AlgebraicTopology/Quasicategory/Basic.lean,Mathlib/AlgebraicTopology/Quasicategory/InnerFibration.lean,Mathlib/AlgebraicTopology/SimplicialSet/AnodyneExtensions/Inner/Basic.lean 4 4 ['github-actions', 'joelriou', 'mathlib-dependent-issues', 'mathlib-merge-conflicts'] nobody
5-43025
5 days ago
29-13180
29 days ago
0-14
14 seconds
39499 MichaelStollBayreuth
author:MichaelStollBayreuth
 chore: run `lake shake` successively from the leaves We do the experiment from #39481 in reverse order: starting from the leaves, run `lake shake --force --only --fix` and then `lake build` until something breaks. Then fix the problems manually and continue. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) WIP tech debt 8057/0 MS_test/topsort.txt 1 2 ['MichaelStollBayreuth', 'github-actions'] nobody
5-41898
5 days ago
5-54657
5 days ago
0-1
1 second
26212 Thmoas-Guan
author:Thmoas-Guan
 feat(Algebra): the Rees theorem for depth In this PR we proved the Rees theorem for depth. Co-authored-by: Hu Yongle --- - [x] depends on: #37355 - [x] depends on: #38613 - [ ] depends on: #38466 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-ring-theory blocked-by-other-PR large-import 287/27 Mathlib.lean,Mathlib/Algebra/Category/ModuleCat/Basic.lean,Mathlib/Algebra/Category/ModuleCat/Ext/Basic.lean,Mathlib/RingTheory/Depth/Rees.lean,Mathlib/RingTheory/Ideal/Maps.lean,Mathlib/RingTheory/Regular/LinearMap.lean,docs/references.bib 7 60 ['Thmoas-Guan', 'alreadydone', 'chrisflav', 'dagurtomas', 'erdOne', 'github-actions', 'mathlib-dependent-issues', 'mathlib-merge-conflicts', 'mathlib4-merge-conflict-bot'] chrisflav
assignee:chrisflav
5-39028
5 days ago
53-63534
53 days ago
94-80616
94 days
26214 Thmoas-Guan
author:Thmoas-Guan
 feat(Algebra): definition of depth In this PR, we defined the depth of two modules as the minimal order of nonvanishing `Ext` and the `I-depth` for ideal `I` and some basic properties. Including the equivalence of the two in the condition of rees theorem. --- - [ ] depends on: #26212 - [x] depends on: #32966 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra blocked-by-other-PR large-import
label:t-algebra$
 697/27 Mathlib.lean,Mathlib/Algebra/Category/ModuleCat/Basic.lean,Mathlib/Algebra/Category/ModuleCat/Ext/Basic.lean,Mathlib/RingTheory/Depth/Basic.lean,Mathlib/RingTheory/Depth/Rees.lean,Mathlib/RingTheory/Ideal/Maps.lean,Mathlib/RingTheory/Regular/LinearMap.lean,docs/references.bib 8 9 ['Thmoas-Guan', 'github-actions', 'mathlib-merge-conflicts', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
5-39008
5 days ago
336-33525
336 days ago
0-152
2 minutes
39231 mbkybky
author:mbkybky
 chore(RingTheory/PicardGroup): drop `StrongRankCondition` assumptions in two lemmas --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-ring-theory 3/6 Mathlib/RingTheory/PicardGroup.lean 1 1 ['github-actions'] nobody
5-38840
5 days ago
10-58206
10 days ago
10-67307
10 days
39067 mbkybky
author:mbkybky
 feat(Algebra/Module): define modules admitting finite free resolutions We say that an `R`-module `M` has a finite free resolution if there exists an exact sequence `0 ⟶ Eₙ ⟶ ⋯ ⟶ E₀ ⟶ M ⟶ 0` such that `Eᵢ` are finite free `R`-modules. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra
label:t-algebra$
 186/0 Mathlib.lean,Mathlib/Algebra/Module/Equiv/Defs.lean,Mathlib/Algebra/Module/FiniteFreeResolution/Basic.lean 3 1 ['github-actions'] nobody
5-38796
5 days ago
11-22074
11 days ago
14-44778
14 days
39420 mbkybky
author:mbkybky
 feat(RingTheory/LocalProperties): `Module.Invertible` is a local property Let `M` be a finite `R`-module. We show that `M` is invertible if `Mₘ` is invertible for any maximal ideal `m` of `R`. - [ ] depends on: #39109 - [ ] depends on: #39412 --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-ring-theory blocked-by-other-PR 345/12 Mathlib.lean,Mathlib/Algebra/Module/FinitePresentation.lean,Mathlib/Algebra/Module/LocalizedModule/Submodule.lean,Mathlib/LinearAlgebra/FiniteDimensional/Basic.lean,Mathlib/RingTheory/Flat/LocallyFree.lean,Mathlib/RingTheory/LocalProperties/FinitePresentation.lean,Mathlib/RingTheory/LocalProperties/Invertible.lean,Mathlib/RingTheory/Localization/BaseChange.lean,Mathlib/RingTheory/Localization/Finiteness.lean,Mathlib/RingTheory/Spectrum/Prime/FreeLocus.lean,Mathlib/RingTheory/Support.lean 11 2 ['github-actions', 'mathlib-dependent-issues'] nobody
5-38585
5 days ago
7-18391
7 days ago
0-773
12 minutes
26215 Thmoas-Guan
author:Thmoas-Guan
 feat(Algebra): Auslander–Buchsbaum theorem This PR mainly proved the Auslander-Buchsbaum theorem stating for a noetherian local ring `R` and a finitely generated `R` module `M` , `proj.dim(M) + depth(M) = depth(R)`. Co-authored-by: Yongle Hu --- - [ ] depends on: #26214 - [ ] depends on: #32316 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra blocked-by-other-PR large-import
label:t-algebra$
 1076/27 Mathlib.lean,Mathlib/Algebra/Category/ModuleCat/Basic.lean,Mathlib/Algebra/Category/ModuleCat/Ext/Basic.lean,Mathlib/RingTheory/Depth/AuslanderBuchsbaum.lean,Mathlib/RingTheory/Depth/Basic.lean,Mathlib/RingTheory/Depth/Rees.lean,Mathlib/RingTheory/Ideal/Maps.lean,Mathlib/RingTheory/Regular/LinearMap.lean,docs/references.bib 9 11 ['Thmoas-Guan', 'github-actions', 'mathlib-merge-conflicts', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
5-38162
5 days ago
336-33526
336 days ago
0-88
1 minute
26216 Thmoas-Guan
author:Thmoas-Guan
 feat(Algebra): depth of QuotSMulTop In this PR, we proved for a local ring `R` and a finitely generated `R` module `M N`, `IsSMulRegular M x` and `x ∈ Module.annihilator R N`, then `depth(N, M/xM) + 1 = depth(N, M)`, and its corollary for quotient regular seqence. --- - [ ] depends on: #26214 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra blocked-by-other-PR large-import
label:t-algebra$
 962/27 Mathlib.lean,Mathlib/Algebra/Category/ModuleCat/Basic.lean,Mathlib/Algebra/Category/ModuleCat/Ext/Basic.lean,Mathlib/RingTheory/Depth/Basic.lean,Mathlib/RingTheory/Depth/Rees.lean,Mathlib/RingTheory/Ideal/Maps.lean,Mathlib/RingTheory/Regular/LinearMap.lean,docs/references.bib 8 9 ['Thmoas-Guan', 'github-actions', 'mathlib-merge-conflicts', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
5-38121
5 days ago
336-35471
336 days ago
0-49
49 seconds
26217 Thmoas-Guan
author:Thmoas-Guan
 feat(Algebra): Ischebeck theorem This PR mainly proved the Ischbecke theorem, stating that `depth(N,M)` is greater or equal to `depth(M) - dim(N)` for finitely generated module `N, M` over local ring. --- - [ ] depends on: #26214 - [x] depends on: #32081 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra blocked-by-other-PR large-import
label:t-algebra$
 905/27 Mathlib.lean,Mathlib/Algebra/Category/ModuleCat/Basic.lean,Mathlib/Algebra/Category/ModuleCat/Ext/Basic.lean,Mathlib/RingTheory/Depth/Basic.lean,Mathlib/RingTheory/Depth/Ischebeck.lean,Mathlib/RingTheory/Depth/Rees.lean,Mathlib/RingTheory/Ideal/Maps.lean,Mathlib/RingTheory/Regular/LinearMap.lean,docs/references.bib 9 11 ['Thmoas-Guan', 'github-actions', 'mathlib-merge-conflicts', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
5-38005
5 days ago
336-35349
336 days ago
0-51
51 seconds
26218 Thmoas-Guan
author:Thmoas-Guan
 feat(Algebra): definition of cohen macaulay In this PR, we added the definition of CM module, CM local ring (extending local ring), and CM ring. We also proved Theorem 30, Chater 6, _Commutative Algebra_, Matsumura. --- - [x] depends on: #26219 - [ ] depends on: #26217 - [ ] depends on: #26216 - [ ] depends on: #28582 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra blocked-by-other-PR large-import
label:t-algebra$
 1730/27 Mathlib.lean,Mathlib/Algebra/Category/ModuleCat/Basic.lean,Mathlib/Algebra/Category/ModuleCat/Ext/Basic.lean,Mathlib/RingTheory/CohenMacaulay/Basic.lean,Mathlib/RingTheory/Depth/Basic.lean,Mathlib/RingTheory/Depth/Ischebeck.lean,Mathlib/RingTheory/Depth/Rees.lean,Mathlib/RingTheory/Ideal/KrullsHeightTheorem.lean,Mathlib/RingTheory/Ideal/Maps.lean,Mathlib/RingTheory/Regular/LinearMap.lean,docs/references.bib 11 19 ['Thmoas-Guan', 'github-actions', 'leanprover-community-bot-assistant', 'mathlib-merge-conflicts', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
5-37581
5 days ago
336-35193
336 days ago
0-52
52 seconds
28599 Thmoas-Guan
author:Thmoas-Guan
 feat(RingTheory): polynomial over CM ring is CM polynomial over Cohen Macaulay ring is Cohen Macaulay --- - [ ] depends on: #26218 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-ring-theory blocked-by-other-PR large-import 1904/27 Mathlib.lean,Mathlib/Algebra/Category/ModuleCat/Basic.lean,Mathlib/Algebra/Category/ModuleCat/Ext/Basic.lean,Mathlib/RingTheory/CohenMacaulay/Basic.lean,Mathlib/RingTheory/CohenMacaulay/Polynomial.lean,Mathlib/RingTheory/Depth/Basic.lean,Mathlib/RingTheory/Depth/Ischebeck.lean,Mathlib/RingTheory/Depth/Rees.lean,Mathlib/RingTheory/Ideal/KrullsHeightTheorem.lean,Mathlib/RingTheory/Ideal/Maps.lean,Mathlib/RingTheory/Regular/LinearMap.lean,docs/references.bib 12 17 ['Thmoas-Guan', 'erdOne', 'github-actions', 'mathlib-dependent-issues', 'mathlib-merge-conflicts', 'mathlib4-merge-conflict-bot'] mariainesdff
assignee:mariainesdff
5-37510
5 days ago
92-69676
92 days ago
3-48641
3 days
39408 fgdorais
author:fgdorais
 feat(Tactic/Linter/DeprecatedModule): add option `linter.deprecated.module.exclude_root` This PR fixes an incorrect behavior in the deprecated module linter: the linter excluded all modules with filenames ending with `Mathlib.lean` without checking that the file is the Mathlib root module rather than a random module whose name happens to end with `Mathlib` (such are more plausible in downstream projects than in Mathlib itself). The Mathlib root module is autogenerated and imports all modules regardless of deprecation status. So it needs to be excluded from the deprecated module check. An easy way to correct the erroneous behavior would be to remove the hard-coded exclusion from the linter and add `set_option linter.deprecated.module false` at the end of `Mathlib.lean`. However, this PR takes a broader approach, which is to add a `linter.deprecated.module.exclude_root` option. That way downstream projects with a similarly designed root module can also use this feature by setting `linter.deprecated.module.exclude_root` to `true` in their lakefile. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-linter maintainer-merge 19/3 Mathlib/Tactic/Linter/DeprecatedModule.lean,lakefile.lean 2 11 ['JovanGerb', 'adomani', 'fgdorais', 'github-actions'] JovanGerb
assignee:JovanGerb
5-37184
5 days ago
7-40375
7 days ago
7-40086
7 days
29558 Thmoas-Guan
author:Thmoas-Guan
 feat(Algebra): definition of global dimension In this PR, we define projective dimension and global dimension using `CategoryTheory.HasProjectiveDimensionLT` --- - [ ] depends on: #32058 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-ring-theory blocked-by-other-PR 284/0 Mathlib.lean,Mathlib/Algebra/Category/ModuleCat/Ext/Baer.lean,Mathlib/Algebra/Homology/ShortComplex/ModuleCat.lean,Mathlib/RingTheory/GlobalDimension.lean 4 17 ['Thmoas-Guan', 'erdOne', 'github-actions', 'mathlib-merge-conflicts', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] erdOne
assignee:erdOne
5-35022
5 days ago
144-47140
144 days ago
27-39406
27 days
31999 Thmoas-Guan
author:Thmoas-Guan
 feat(RingTheory): global dimension equals the supremum over localizations Global dimension of ring is equal to supremum of global dimension over localizations at all prime/maximal ideal. --- - [x] depends on: #32000 - [x] depends on: #31998 - [ ] depends on: #29558 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) blocked-by-other-PR t-ring-theory 366/0 Mathlib.lean,Mathlib/Algebra/Category/ModuleCat/Ext/Baer.lean,Mathlib/Algebra/Homology/ShortComplex/ModuleCat.lean,Mathlib/RingTheory/GlobalDimension.lean 4 17 ['Thmoas-Guan', 'github-actions', 'jcommelin', 'mathlib-merge-conflicts', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
5-35000
5 days ago
178-45440
178 days ago
1-68813
1 day
37680 IvanRenison
author:IvanRenison
 feat(Combinatorics/SimpleGraph/Clique): add lemmas about isomorphisms and cliques --- Idea from this Zulip thread: [#**graph theory>Second Order Monadic Logic for Graph** ](https://leanprover.zulipchat.com/#narrow/channel/252551-graph-theory/topic/Second.20Order.20Monadic.20Logic.20for.20Graph/with/583013775) - [x] depends on: #37649 - [x] depends on: #37640 - [x] depends on: #37676 - [ ] depends on: #37697 - [ ] depends on: #37700 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) blocked-by-other-PR t-combinatorics 156/0 Mathlib/Combinatorics/SimpleGraph/Clique.lean,Mathlib/Combinatorics/SimpleGraph/Maps.lean 2 5 ['github-actions', 'mathlib-dependent-issues', 'mathlib-merge-conflicts'] nobody
5-34026
5 days ago
unknown
0-0
0 seconds
37579 IvanRenison
author:IvanRenison
 feat(Combinatorics/SimpleGraph/Girth): add lemmas about the length of a walk being equal to the girth --- - [x] depends on: #37561 - [ ] depends on: #37577 - [x] depends on: #37574 - [ ] depends on: #37562 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) blocked-by-other-PR t-combinatorics 188/79 Mathlib/Combinatorics/SimpleGraph/Girth.lean,Mathlib/Combinatorics/SimpleGraph/Paths.lean,Mathlib/Combinatorics/SimpleGraph/Walk/Basic.lean,Mathlib/Combinatorics/SimpleGraph/Walk/Decomp.lean,Mathlib/Combinatorics/SimpleGraph/Walk/Operations.lean 5 3 ['github-actions', 'mathlib-dependent-issues', 'mathlib-merge-conflicts'] nobody
5-33430
5 days ago
49-84016
49 days ago
0-678
11 minutes
39504 WenrongZou
author:WenrongZou
 feat(MvPowerSeries/Ideal): kernel of map equals map `C` of kernel In this PR, we prove that given a ring homomorphism f, suppose that kernel of f is finitely generated, then kernel of map equals map `C` of kernel. (See `ker_map_of_FG`). --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-ring-theory 87/0 Mathlib.lean,Mathlib/RingTheory/MvPowerSeries/Ideal.lean 2 4 ['CoolRmal', 'WenrongZou', 'github-actions'] nobody
5-29643
5 days ago
5-39960
5 days ago
5-39971
5 days
38739 CoolRmal
author:CoolRmal
 feat: Analytic Hahn Banach theorem for locally convex spaces Closes #38419 This PR proves Hahn-Banach theorem for locally convex spaces, which allow us to generalize both [ContinuousLinearMap.exist_extension_of_finiteDimensional_range](https://leanprover-community.github.io/mathlib4_docs/Mathlib/Analysis/Normed/Module/HahnBanach.html#ContinuousLinearMap.exist_extension_of_finiteDimensional_range) and [Submodule.ClosedComplemented.of_finiteDimensional](https://leanprover-community.github.io/mathlib4_docs/Mathlib/Analysis/Normed/Module/HahnBanach.html#Submodule.ClosedComplemented.of_finiteDimensional) (I also moved these two lemmas to the new file I created). Some helper lemmas about continuity of seminorms/linear functions are added. Created with the help of Codex. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-analysis delegated 185/57 Mathlib.lean,Mathlib/Analysis/LocallyConvex/HahnBanach.lean,Mathlib/Analysis/LocallyConvex/WithSeminorms.lean,Mathlib/Analysis/Normed/Module/HahnBanach.lean,Mathlib/Analysis/Seminorm.lean 5 17 ['ADedecker', 'CoolRmal', 'github-actions', 'j-loreaux', 'mathlib-bors'] ADedecker
assignee:ADedecker
5-25397
5 days ago
12-7144
12 days ago
10-63110
10 days
37914 j-loreaux
author:j-loreaux
 feat: transfer `star`-related instances across equivalences This also adds `Function.Injective.{InvolutiveStar,...}` and related lemmas. In addition we rename the existing `Equiv.star` to `Equiv.Perm.star` (without a deprecation) so that the name can be used for the declaration which transfers a `Star` instance across an `Equiv`. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra maintainer-merge
label:t-algebra$
 95/2 Mathlib.lean,Mathlib/Algebra/Star/Basic.lean,Mathlib/Algebra/Star/Pointwise.lean,Mathlib/Algebra/Star/TransferInstance.lean 4 15 ['SnirBroshi', 'github-actions', 'themathqueen'] themathqueen
assignee:themathqueen
5-23595
5 days ago
29-15474
29 days ago
29-17094
29 days
37976 CoolRmal
author:CoolRmal
 feat(MeasureTheory): Lusin's theorem We prove several versions of Lusin's theorem, all of which roughly says that measurable functions are continuous on nearly all its domain. --- - [x] depends on: #38533 - [x] depends on: #38535 - [ ] depends on: #38536 - [x] depends on: #38538 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-measure-probability blocked-by-other-PR large-import merge-conflict 792/14 Mathlib.lean,Mathlib/MeasureTheory/Function/LusinContinuous.Lean,Mathlib/MeasureTheory/Measure/Tight.lean,Mathlib/Topology/Constructions.lean,Mathlib/Topology/Maps/Basic.lean,Mathlib/Topology/Separation/GDelta.lean,Mathlib/Topology/Separation/Hausdorff.lean,docs/1000.yaml 8 15 ['CoolRmal', 'github-actions', 'grunweg', 'mathlib-dependent-issues', 'mathlib-merge-conflicts', 'vihdzp'] nobody
5-22783
5 days ago
39-52208
39 days ago
0-17
17 seconds
26088 grunweg
author:grunweg
 chore(Linter/DirectoryDependency): move forbidden directories into a JSON file This PR continues the work from #25406. Original PR: https://github.com/leanprover-community/mathlib4/pull/25406 please-adopt t-linter merge-conflict 387/19 Mathlib/Tactic/Linter/DirectoryDependency.lean,scripts/README.md,scripts/forbiddenDirs.json 3 7 ['Vierkantor', 'github-actions', 'grunweg', 'mathlib4-merge-conflict-bot', 'rosborn'] nobody
5-20723
5 days ago
268-45702
268 days ago
0-2565
42 minutes
38745 FordUniver
author:FordUniver
 refactor(Combinatorics/SimpleGraph/Copy): rename copy counts, align variable names, clean up docstring Renames `labelledCopyCount` to `copyCount` and reassigns the previous `copyCount` to `unlabeledCopyCount`. Unifies graph-variable letters to the standard `G`uest / `H`ost convention. Restructures and cleans up the module docstring. --- **Step 2/5 of the `Copy` / `InducedCopy` refactor-feat stack.** Originally motivated by [a adiscussion](https://github.com/leanprover-community/mathlib4/pull/38631#discussion_r3163732684) in #38631 by @SnirBroshi that the British spelling of `labelled` is deprecated; see also discussion on Zulip ([#general > SimpleGraph.Copy is labeled but copyCount is not](https://leanprover.zulipchat.com/#narrow/channel/113489-new-members/topic/SimpleGraph.2ECopy.20is.20labeled.20but.20copyCount.20is.20not)). The addition of the new `Sub` type was separated into #39307 as a requirement to keep the diff somewhat readable. On top of the Zulip discussion I also unified the argument naming to always follow the `G`uest / `H`ost convention. This highlighted a discrepancy where we write `Copy G H` but `copyCount H G`. I left this untouched since small-first-big-later seems to be the type and big-first-small-later the ops norm in mathlib. I am happy to align them if someone has a strong opinion either way. I also adjusted a ton of docstrings since the rename was already touching them, so it seemed sensible to use this opportunity for cleanup. Open to suggestions for what should be done differently. I also considered replacing `Bot`/`Top` with `EmptyGraph`/`CompleteGraph` in args and statement names (@SnirBroshi that was the now-closed #39303 ) because I thought that was established with #23838 but it seems [controversial](https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/completeGraph.20vs.20.E2.8A.A4), so I have reverted it. | notion | before | after | |---|---|---| | labelled copy / injective hom / monomorphism | `Copy A B` | `Copy G H` | | count of labelled copies | `G.labelledCopyCount H` | `H.copyCount G` | | count of unlabelled copies | `G.copyCount H` | `H.unlabeledCopyCount G` | | killing operation | `G.killCopies H` | `H.killCopies G` | | graph variables | mixed `A B C` / `α β γ` and `G H I` / `V W X` | uniform `G H I` / `V W X` (+ `G'`/`H'` on `V'`/`W'`) | - [ ] depends on: #39307 Diff for the changes *just* in this PR over its predecessor: [link](https://github.com/FordUniver/mathlib4/compare/feat/copy-sub-abbrev...chore/copy-spelling) t-combinatorics new-contributor blocked-by-other-PR 234/240 Mathlib/Combinatorics/SimpleGraph/Copy.lean 1 21 ['FordUniver', 'SnirBroshi', 'YaelDillies', 'github-actions', 'mathlib-bors', 'mathlib-dependent-issues', 'mitchell-horner'] nobody
5-18261
5 days ago
9-25798
9 days ago
11-52734
11 days
39203 FordUniver
author:FordUniver
 refactor(Analysis/Calculus/Gradient): ungate inner_gradient lemmas Removes superfluous differentiability hypotheses (plus `UniqueDiffWithinAt` for the `Within` versions) from the four `inner_gradient[Within]_[left|right]` lemmas: `gradient` is defined as `(toDual 𝕜 F).symm (fderiv 𝕜 f x)`, so `⟪∇ f x, y⟫ = fderiv 𝕜 f x y` holds unconditionally since both sides are zero when `f` is not differentiable at `x`. --- Genuinely unsure about this one because the only call I currently have in my code itself has the differentiability hypothesis. But including unused (or unnecessary) assumptions seems not intentional? My best guess is that the hypotheses were included by analogy with `HasGradientAt.fderiv_apply`, which genuinely needs them. This PR drops the hypotheses and rewrites the proofs through the isomorphism directly; no existing mathlib callers pass the now-redundant arguments. t-analysis maintainer-merge 17/10 Mathlib/Analysis/Calculus/Gradient/Basic.lean 1 6 ['FordUniver', 'Komyyy', 'github-actions'] urkud
assignee:urkud
5-17269
5 days ago
11-27459
11 days ago
11-27170
11 days
37848 rwst
author:rwst
 feat(RingTheory/PowerSeries/Log): log and exp as inverses This adds the lemmas `exp_subst_log` and `log_subst_exp_sub_one`, together with two helpers needed for the proofs. Note: I'm using Claude + Opus for supervised formalization tasks. Claude has no permission to use git on my machine. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-ring-theory LLM-generated 88/0 Mathlib/RingTheory/PowerSeries/Log.lean,Mathlib/RingTheory/PowerSeries/Substitution.lean 2 10 ['chrisflav', 'github-actions', 'rwst'] chrisflav
assignee:chrisflav
5-16042
5 days ago
11-26171
11 days ago
42-8358
42 days
39307 FordUniver
author:FordUniver
 feat(Combinatorics/SimpleGraph/Copy): introduce `UnlabeledCopy` carrier subtype Adds `abbrev UnlabeledCopy A B := {B' : B.Subgraph // Nonempty (A ≃g B'.coe)}` and uses it to replace the previous inline filter-set body of `copyCount G H`. Drops the now unused legacy Finset-image bridge `copyCount_eq_card_image_copyToSubgraph`. Adds `uniqueUnlabeledCopyBot` instance so `copyCount_bot` is a one-liner via `Fintype.card_unique`. --- **Step 1/5 of the `Copy` / `InducedCopy` refactor-feat stack.** This PR isolates the `UnlabeledCopy` type introduction and the count's type-form redefinition from the larger rename/convention work in the rest of the stack. Note that resolving the current clash in naming (`Copy` and `UnlabeledCopy` vs `labelledCopyCount` and `copyCount`) is part of #38745. t-combinatorics 32/29 Mathlib/Combinatorics/SimpleGraph/Copy.lean 1 6 ['FordUniver', 'github-actions', 'mathlib-bors', 'mitchell-horner'] nobody
5-14016
5 days ago
5-23300
5 days ago
9-22985
9 days
38917 yuanyi-350
author:yuanyi-350
 chore(CategoryTheory/Comma/Basic): remove an erw - rewrites the `full_map` proof by pushing `Functor.comp_map` and the naturality equalities into a single `rw`/`simp only` chain - removes the `erw`-based transport of `α.naturality_assoc` and `β.naturality` Extracted from #38415 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) codex LLM-generated awaiting-author 5/5 Mathlib/CategoryTheory/Comma/Basic.lean 1 2 ['github-actions', 'loefflerd'] nobody
5-9516
5 days ago
5-9516
5 days ago
13-30201
13 days
39514 SnirBroshi
author:SnirBroshi
 chore(RingTheory/Polynomial/Basic): golf `degreeLTEquiv` Also extracts the `monomial i a ∈ degreeLT R n` proof to a lemma. --- The semicolons might be a bit excessive, let me know if so. Also the `right_inv` proof is slower than the previous version, so maybe it should be reverted, but the rest is fine. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-ring-theory 11/32 Mathlib/RingTheory/Polynomial/Basic.lean 1 1 ['github-actions'] nobody
5-9441
5 days ago
5-9727
5 days ago
5-9846
5 days
36954 FMLJohn
author:FMLJohn
 feat(Topology/ClosedBases): `TopologicalSpace.IsClosedBasis` and `TopologicalSpace.IsClosedSubbasis s` In this pull request, I have defined closed bases and closed subbases of topologies, and proved some basic properties of them. ## Main definitions * `TopologicalSpace.IsClosedBasis s`: A closed basis of a topological space `α` is a collection of closed sets `s : Set (Set α)` such that every closed subset of `α` can be written as an intersection of elements of `s`. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-topology 117/0 Mathlib.lean,Mathlib/Topology/Bases.lean,Mathlib/Topology/ClosedBases.lean 3 19 ['github-actions', 'scholzhannah'] urkud
assignee:urkud
5-9007
5 days ago
29-35762
29 days ago
58-37799
58 days
38916 yuanyi-350
author:yuanyi-350
 chore(CategoryTheory/CatCommSq): remove an erw - rewrites `hInv_hInv` by using `conv_rhs` with `iso_hom_naturality` - removes the `rw`/`erw` pair around `Functor.comp_map` Extracted from #38415 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) codex LLM-generated 3/2 Mathlib/CategoryTheory/CatCommSq.lean 1 2 ['github-actions', 'loefflerd'] nobody
5-8195
5 days ago
18-39719
18 days ago
18-39430
18 days
36934 Parcly-Taxel
author:Parcly-Taxel
 refactor: `Language` as a one-field structure I came across definitional equality problems when trying to prove the following as part of a challenge from my PhD advisor: ```lean import Mathlib.Computability.Language variable {α : Type*} /-- `IsSingleton y` states that `y` consists of only one word, and that word is not empty. -/ def IsSingleton (y : Language α) : Prop := (∀ z ≤ y, z = y ∨ z = 0) ∧ y ≠ 1 ∧ y ≠ 0 lemma isSingleton_iff {y : Language α} : IsSingleton y ↔ ∃ w ≠ [], y = {w} := by sorry ``` This refactor resolves said defeq problems by making `Language` into a one-field structure with `toSet` and `ofSet`. --- - [ ] depends on: #37603 t-computability blocked-by-other-PR merge-conflict 179/110 Mathlib/Computability/ContextFreeGrammar.lean,Mathlib/Computability/DFA.lean,Mathlib/Computability/EpsilonNFA.lean,Mathlib/Computability/Language.lean,Mathlib/Computability/MyhillNerode.lean,Mathlib/Computability/NFA.lean,Mathlib/Computability/RegularExpressions.lean 7 22 ['Parcly-Taxel', 'YaelDillies', 'eric-wieser', 'github-actions', 'mathlib-dependent-issues', 'mathlib-merge-conflicts'] YaelDillies
assignee:YaelDillies
4-82227
4 days ago
44-54655
44 days ago
11-26368
11 days
36971 Jun2M
author:Jun2M
 feat(Combinatorics/GraphLike): Change SimpleGraph files to use GraphLike Per discussion at ([#graph theory > HasAdj](https://leanprover.zulipchat.com/#narrow/channel/252551-graph-theory/topic/HasAdj/with/575843445)), this PR changes a swath of files in `SimpleGraph` folder to use `GraphLike` class and its APIs. --- - [ ] depends on: #36743 - [ ] depends on: #39047 - [ ] depends on: #36829 - [ ] depends on: #36756 - [ ] depends on: #39054 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) blocked-by-other-PR t-combinatorics merge-conflict 2202/1597 Archive/Wiedijk100Theorems/Konigsberg.lean,Mathlib.lean,Mathlib/CategoryTheory/Sites/IsSheafFor.lean,Mathlib/Combinatorics/GraphLike/Basic.lean,Mathlib/Combinatorics/GraphLike/Walks/Basic.lean,Mathlib/Combinatorics/GraphLike/Walks/Simple.lean,Mathlib/Combinatorics/SimpleGraph/Acyclic.lean,Mathlib/Combinatorics/SimpleGraph/AdjMatrix.lean,Mathlib/Combinatorics/SimpleGraph/Circulant.lean,Mathlib/Combinatorics/SimpleGraph/Clique.lean,Mathlib/Combinatorics/SimpleGraph/Coloring/Constructions.lean,Mathlib/Combinatorics/SimpleGraph/Connectivity/Connected.lean,Mathlib/Combinatorics/SimpleGraph/Connectivity/EdgeConnectivity.lean,Mathlib/Combinatorics/SimpleGraph/Connectivity/Subgraph.lean,Mathlib/Combinatorics/SimpleGraph/Dart.lean,Mathlib/Combinatorics/SimpleGraph/DegreeSum.lean,Mathlib/Combinatorics/SimpleGraph/DeleteEdges.lean,Mathlib/Combinatorics/SimpleGraph/Ends/Defs.lean,Mathlib/Combinatorics/SimpleGraph/Girth.lean,Mathlib/Combinatorics/SimpleGraph/GraphLike.lean,Mathlib/Combinatorics/SimpleGraph/Hamiltonian.lean,Mathlib/Combinatorics/SimpleGraph/Hasse.lean,Mathlib/Combinatorics/SimpleGraph/LapMatrix.lean,Mathlib/Combinatorics/SimpleGraph/Maps.lean,Mathlib/Combinatorics/SimpleGraph/Matching.lean,Mathlib/Combinatorics/SimpleGraph/Metric.lean,Mathlib/Combinatorics/SimpleGraph/Paths.lean,Mathlib/Combinatorics/SimpleGraph/Prod.lean,Mathlib/Combinatorics/SimpleGraph/Subgraph.lean,Mathlib/Combinatorics/SimpleGraph/Sum.lean,Mathlib/Combinatorics/SimpleGraph/Trails.lean,Mathlib/Combinatorics/SimpleGraph/Tutte.lean,Mathlib/Combinatorics/SimpleGraph/Walk/Basic.lean,Mathlib/Combinatorics/SimpleGraph/Walk/Chord.lean,Mathlib/Combinatorics/SimpleGraph/Walk/Counting.lean,Mathlib/Combinatorics/SimpleGraph/Walk/Decomp.lean,Mathlib/Combinatorics/SimpleGraph/Walk/Maps.lean,Mathlib/Combinatorics/SimpleGraph/Walk/Operations.lean,Mathlib/Combinatorics/SimpleGraph/Walk/Subwalks.lean,Mathlib/Combinatorics/SimpleGraph/Walk/Traversal.lean,Mathlib/Data/Subtype.lean,Mathlib/Tactic.lean,Mathlib/Tactic/Simproc/CastData.lean 43 7 ['github-actions', 'mathlib-bors', 'mathlib-dependent-issues', 'mathlib-merge-conflicts'] nobody
4-82226
4 days ago
61-70244
61 days ago
0-533
8 minutes
37671 grunweg
author:grunweg
 feat: also check for norm_num in the flexible linter Most other flexible tactics are terminal; dsimp is missing from this list (but perhaps less important in practice. --- - [x] depends on: #37880 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-linter awaiting-author merge-conflict 31/1 Archive/Wiedijk100Theorems/AbelRuffini.lean,Mathlib/Algebra/Order/Floor/Ring.lean,Mathlib/Algebra/Order/Floor/Semifield.lean,Mathlib/Analysis/CStarAlgebra/ContinuousFunctionalCalculus/Order.lean,Mathlib/Analysis/CStarAlgebra/Unitary/Connected.lean,Mathlib/Analysis/InnerProductSpace/Convex.lean,Mathlib/Analysis/SpecialFunctions/ArithmeticGeometricMean.lean,Mathlib/Analysis/SpecialFunctions/Gaussian/GaussianIntegral.lean,Mathlib/Analysis/SpecialFunctions/Integrals/Basic.lean,Mathlib/Analysis/SpecialFunctions/Trigonometric/Arctan.lean,Mathlib/Combinatorics/Additive/AP/Three/Behrend.lean,Mathlib/Combinatorics/SimpleGraph/Regularity/Chunk.lean,Mathlib/LinearAlgebra/RootSystem/Reduced.lean,Mathlib/MeasureTheory/Integral/MeanInequalities.lean,Mathlib/MeasureTheory/Measure/IntegralCharFun.lean,Mathlib/NumberTheory/Chebyshev.lean,Mathlib/NumberTheory/Harmonic/EulerMascheroni.lean,Mathlib/Tactic/Linter/FlexibleLinter.lean,Mathlib/Topology/UrysohnsLemma.lean 19 12 ['SnirBroshi', 'github-actions', 'grunweg', 'joneugster', 'mathlib-bors', 'mathlib-dependent-issues', 'mathlib-merge-conflicts'] nobody
4-82102
4 days ago
35-33895
35 days ago
4-15280
4 days
38054 chrisflav
author:chrisflav
 feat(RingTheory): category of finite étale algebras over a separably closed field We define the category of finite étale `R`-algebras for a ring `R` and show it is equivalent to `FintypeCat` if `R` is a separably closed field. From Pi1. --- - [ ] depends on: #38016 - [ ] depends on: #38409 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-ring-theory large-import blocked-by-other-PR merge-conflict 338/1 Mathlib.lean,Mathlib/Algebra/Algebra/Pi.lean,Mathlib/FieldTheory/IntermediateField/Adjoin/Basic.lean,Mathlib/FieldTheory/IsSepClosed.lean,Mathlib/RingTheory/Artinian/Module.lean,Mathlib/RingTheory/Etale/Basic.lean,Mathlib/RingTheory/Etale/Field.lean,Mathlib/RingTheory/Etale/Finite.lean,Mathlib/RingTheory/TensorProduct/Maps.lean,Mathlib/RingTheory/TotallySplit.lean 10 6 ['github-actions', 'mathlib-dependent-issues', 'mathlib-merge-conflicts'] nobody
4-80809
4 days ago
29-36566
29 days ago
0-82112
22 hours
39287 xgenereux
author:xgenereux
 feat(Localization/AtPrime/Basic): upgrade `equivQuotMaximalIdeal` to an AlgEquiv The definition [IsLocalization.AtPrime.equivQuotMaximalIdealPow](https://leanprover-community.github.io/mathlib4_docs/Mathlib/RingTheory/Localization/AtPrime/Basic.html#IsLocalization.AtPrime.equivQuotMaximalIdealPow) was added in #36783. The case with `n = 1` is still important and interesting. I have upgraded it to an AlgEquiv using `equivQuotMaximalIdealPow`. This did break a few small things, because we need to bridge back to a `RingEquiv` in some places. I took the liberty to add some missing `apply` lemmas to ease fixing these proofs. Disclaimer: I used Claude to suggest the first shot and refined it from there. María Inés de Frutos Fernández <[mariaines.dff@gmail.com](mailto:mariaines.dff@gmail.com)> --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-ring-theory merge-conflict 45/68 Mathlib/RingTheory/Localization/AtPrime/Basic.lean,Mathlib/RingTheory/Localization/AtPrime/Extension.lean,Mathlib/RingTheory/Trace/Quotient.lean 3 2 ['github-actions', 'mathlib-merge-conflicts', 'wwylele'] nobody
4-80430
4 days ago
4-80431
4 days ago
4-53165
4 days
39481 MichaelStollBayreuth
author:MichaelStollBayreuth
 chore: run `lake shake` iteratively and fix problems This adds `-- shake: keep-all` to all modules under `Mathlib.Lean`, `Mathlib.Tactic` and `Mathlib.Util`. Then it goes through the remaining modules in topological order (according to the list in `MS_test/topsort3.txt`) and for each of them, runs `lake shake --force --only --fix`, followed by `lake build `. If there is no error, the changes are commited. Otherwise, the problems are fixed manually; then the changes are committed. This has been done for the first ~400 modules in the list. 38 of them required manual fixes; they are listed in `MS_test/after_shake_fixes.txt`. We note that the import stats bot claims that the number of imports actually *increases* in most files, which somehow runs counter expectations... Discussion: [#mathlib4 > shake without --add-public @ 💬](https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/shake.20without.20--add-public/near/595349216) --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) WIP tech debt large-import merge-conflict 9178/858 MS_test/after_shake_fixes.txt,MS_test/topsort3.txt,Mathlib/Algebra/AddTorsor/Defs.lean,Mathlib/Algebra/BigOperators/Group/List/Basic.lean,Mathlib/Algebra/CharZero/Defs.lean,Mathlib/Algebra/ContinuedFractions/Basic.lean,Mathlib/Algebra/Divisibility/Basic.lean,Mathlib/Algebra/Divisibility/Hom.lean,Mathlib/Algebra/Divisibility/Prod.lean,Mathlib/Algebra/Divisibility/Units.lean,Mathlib/Algebra/EuclideanDomain/Field.lean,Mathlib/Algebra/Expr.lean,Mathlib/Algebra/Field/Defs.lean,Mathlib/Algebra/Field/IsField.lean,Mathlib/Algebra/Free.lean,Mathlib/Algebra/FreeMonoid/Basic.lean,Mathlib/Algebra/FreeMonoid/Count.lean,Mathlib/Algebra/Group/Action/Defs.lean,Mathlib/Algebra/Group/Action/Faithful.lean,Mathlib/Algebra/Group/Action/Option.lean,Mathlib/Algebra/Group/Action/Pretransitive.lean,Mathlib/Algebra/Group/Action/Sum.lean,Mathlib/Algebra/Group/Basic.lean,Mathlib/Algebra/Group/Commute/Basic.lean,Mathlib/Algebra/Group/Commute/Units.lean,Mathlib/Algebra/Group/Defs.lean,Mathlib/Algebra/Group/Equiv/Basic.lean,Mathlib/Algebra/Group/Equiv/Defs.lean,Mathlib/Algebra/Group/Equiv/TypeTags.lean,Mathlib/Algebra/Group/Ext.lean,Mathlib/Algebra/Group/Hom/Basic.lean,Mathlib/Algebra/Group/Hom/Defs.lean,Mathlib/Algebra/Group/Hom/End.lean,Mathlib/Algebra/Group/Hom/Instances.lean,Mathlib/Algebra/Group/Idempotent.lean,Mathlib/Algebra/Group/InjSurj.lean,Mathlib/Algebra/Group/Int/Units.lean,Mathlib/Algebra/Group/Invertible/Basic.lean,Mathlib/Algebra/Group/Invertible/Defs.lean,Mathlib/Algebra/Group/Irreducible/Defs.lean,Mathlib/Algebra/Group/ModEq.lean,Mathlib/Algebra/Group/Nat/Hom.lean,Mathlib/Algebra/Group/Opposite.lean,Mathlib/Algebra/Group/Pi/Basic.lean,Mathlib/Algebra/Group/Pi/Units.lean,Mathlib/Algebra/Group/Prod.lean,Mathlib/Algebra/Group/Semiconj/Basic.lean,Mathlib/Algebra/Group/Semiconj/Defs.lean,Mathlib/Algebra/Group/Semiconj/Units.lean,Mathlib/Algebra/Group/Torsion.lean,Mathlib/Algebra/Group/TypeTags/Basic.lean,Mathlib/Algebra/Group/Units/Basic.lean,Mathlib/Algebra/Group/Units/Defs.lean,Mathlib/Algebra/Group/Units/Hom.lean,Mathlib/Algebra/Group/WithOne/Basic.lean,Mathlib/Algebra/Group/WithOne/Defs.lean,Mathlib/Algebra/GroupWithZero/Action/Defs.lean,Mathlib/Algebra/GroupWithZero/Basic.lean,Mathlib/Algebra/GroupWithZero/Commute.lean,Mathlib/Algebra/GroupWithZero/Defs.lean,Mathlib/Algebra/GroupWithZero/Divisibility.lean,Mathlib/Algebra/GroupWithZero/Hom.lean,Mathlib/Algebra/GroupWithZero/Idempotent.lean,Mathlib/Algebra/GroupWithZero/InjSurj.lean,Mathlib/Algebra/GroupWithZero/Invertible.lean,Mathlib/Algebra/GroupWithZero/NeZero.lean,Mathlib/Algebra/GroupWithZero/Opposite.lean,Mathlib/Algebra/GroupWithZero/Prod.lean,Mathlib/Algebra/GroupWithZero/Regular.lean,Mathlib/Algebra/GroupWithZero/Semiconj.lean,Mathlib/Algebra/GroupWithZero/Units/Basic.lean,Mathlib/Algebra/GroupWithZero/WithZero.lean,Mathlib/Algebra/HierarchyDesign.lean,Mathlib/Algebra/Homology/ComplexShape.lean,Mathlib/Algebra/Homology/Embedding/Basic.lean,Mathlib/Algebra/NeZero.lean,Mathlib/Algebra/Notation.lean,Mathlib/Algebra/Notation/Defs.lean,Mathlib/Algebra/Notation/Lemmas.lean,Mathlib/Algebra/Notation/Pi/Basic.lean,Mathlib/Algebra/Notation/Pi/Defs.lean,Mathlib/Algebra/Notation/Prod.lean,Mathlib/Algebra/Opposites.lean,Mathlib/Algebra/Order/GroupWithZero/Unbundled/Defs.lean,Mathlib/Algebra/Order/Monoid/Unbundled/Defs.lean,Mathlib/Algebra/Prime/Defs.lean,Mathlib/Algebra/Quotient.lean,Mathlib/Algebra/Regular/Basic.lean,Mathlib/Algebra/Regular/Defs.lean,Mathlib/Algebra/Ring/Basic.lean,Mathlib/Algebra/Ring/Defs.lean,Mathlib/Algebra/Ring/Ext.lean,Mathlib/Algebra/Ring/GrindInstances.lean,Mathlib/Algebra/Ring/Hom/Defs.lean,Mathlib/Algebra/Ring/Hom/InjSurj.lean,Mathlib/Algebra/Ring/Idempotent.lean,Mathlib/Algebra/Ring/InjSurj.lean,Mathlib/Algebra/Ring/Int/Defs.lean,Mathlib/Algebra/Ring/Invertible.lean,Mathlib/Algebra/Ring/MinimalAxioms.lean 690 2 ['github-actions', 'mathlib-merge-conflicts'] nobody
4-80427
4 days ago
unknown
0-0
0 seconds
39482 kbuzzard
author:kbuzzard
 (fixing up another PR because I'm impatient): --- - [ ] depends on: #39467 [(in fact it _is_ #39467, I was just impatient] [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) WIP t-algebra merge-conflict
label:t-algebra$
 24/10 Mathlib/Algebra/Ring/Defs.lean,Mathlib/Algebra/Ring/Ext.lean,Mathlib/Algebra/Ring/GrindInstances.lean 3 6 ['github-actions', 'kbuzzard', 'leanprover-radar', 'mathlib-dependent-issues', 'mathlib-merge-conflicts'] nobody
4-80426
4 days ago
6-366
6 days ago
0-1
1 second
39202 FordUniver
author:FordUniver
 feat(Analysis/Calculus/Gradient): add toDual_gradient and companions Add `toDual_gradient`, `toDual_gradientWithin`, and the composed variants `toDual_comp_gradient`, `toDual_comp_gradientWithin` — the natural inverse direction of the gradient's defining equation `∇ f x := (toDual 𝕜 F).symm (fderiv 𝕜 f x)`. These identify `(toDual 𝕜 F) (∇ f x)` with `fderiv 𝕜 f x` (and the `gradientWithin` and composed forms with the corresponding fderiv versions), making the Riesz isomorphism between the two derivative views explicit. The proofs of `DifferentiableAt.hasGradientAt` and `DifferentiableWithinAt.hasGradientWithinAt` in the same file are simplified to use them. --- Came up while formalizing the descent lemma for Lipschitz-smooth functions, where being able to switch between `LipschitzWith K (fderiv ℝ f)` and `LipschitzWith K (∇ f)` is helpful, which with this PR becomes `toDual_comp_gradient ▸ (toDual ℝ F).isometry.lipschitzWith_iff K`. Also slightly simplifies two call sites in mathlib. maintainer-merge 20/5 Mathlib/Analysis/Calculus/Gradient/Basic.lean 1 5 ['FordUniver', 'Komyyy', 'github-actions'] nobody
4-79573
4 days ago
11-26933
11 days ago
11-26808
11 days
39505 dannyhe652
author:dannyhe652
 feat(SimpleGraph): add Vizing's theorem for edge coloring Hi! I'm a high school student interested in formulization of mathematics in Lean. Recently, I have worked on a project to formulize Vizing Theorem with Daniel Raggi from Cambridge University with AI assistance. In particular, we first drafted an outline for the proof, and built the proof using Claude Opus 4.5 and 4.6. The proof is optimized using Aristotle and finally reviewed by ourselves. We rewrote some parts of the code and some comments. The code now builds cleanly and we wish this code to be reviewed by Lean Community. I am aware that there are previous attempts, some being successful, on formulizing Vizing Theorem, including this one by Arohee https://github.com/aroheebhoja/vizing. However, I believe that no PR have been made. Our proof is not based on his proof, but it could be helpful for the community to review that project as well. I sincerely thank everyone who has time to verify and review our code. A summary of the project is as follows. Please contact me if there are any questions or problems. ## Summary This PR completes the proof of **Vizing's theorem** for edge coloring in simple graphs, proving that the chromatic index of any graph is either Δ (the maximum degree) or Δ + 1. ## Changes ### New files - **`Mathlib/Combinatorics/SimpleGraph/Coloring/EdgeColoring.lean`** — Core definitions - `edgeColoring`: Type for line graph colorings - `edgeColorable`: Graph is edge-colorable with n colors - `chromaticIndex`: Chromatic index as ℕ - **`Mathlib/Combinatorics/SimpleGraph/Coloring/KempeChain.lean`** — Kempe Chain - Coloring observables: `incidentEdges`, `incidentColors`, `missingColors` - Kempe subgraph structure with bounded degree - `swapKempe`: Recolor edges in a connected component via color-swapping - **`Mathlib/Combinatorics/SimpleGraph/Coloring/VizingFan.lean`** — Vizing Fan Rotation - `IsFan`: Vizing fan structure with special color properties - Fan maximality and dichotomy on terminal vertices - `rotate_termA`: Extend coloring when a free color exists at both endpoints - `vizingAdjacencyLemma`: Main adjacency lemma for both cases - **`Mathlib/Combinatorics/SimpleGraph/Coloring/VizingTheorem.lean`** — Main theorems - `edge_eq_of_color_eq`: Proper edge colorings assign different colors to distinct edges sharing a vertex - `maxDegree_le_chromaticIndex`: χ'(G) ≥ Δ(G) - `chromaticIndex_bot`: Empty graph has chromatic index 0 - `vizingUpperBound_aux`: Inductive proof of upper bound on number of edge - `vizingTheorem`: χ'(G) ∈ {Δ(G), Δ(G) + 1} ### Modified files - `Mathlib.lean` — Added imports for the four new coloring modules ## Technical Approach **Lower bound** (χ'(G) ≥ Δ): - Edges incident to a max-degree vertex form a clique in the line graph - Clique number lower-bounds chromatic number **Upper bound** (χ'(G) ≤ Δ + 1): - Induction on the number of edges - Base case: empty graph colored with 0 colors - Inductive step: - If a free color exists at both endpoints of an edge, then extend directly - Otherwise: - Build a maximal fan from one endpoint - Apply dichotomy: either extend via Term-A (free color at both endpoints) or Term-B (Kempe swap) - Term-B uses a three-vertex connectivity argument to derive a contradiction, forcing the fan to extend ## Key Lemmas - `incidentEdges`, `incidentColors`, `missingColors`: Coloring observables at vertices - `kempeSubgraph`: Restricted subgraph of edges with two specific colors - `swapKempe`: Recolor via Kempe chain swapping - `IsFan.singleton`: Trivial fan always valid - `IsFan.length_le_card`: Fan length is bounded by vertex count - `IsFan.dichotomy`: Maximal fan satisfies Term-A or Term-B - `IsFan.rotate_termA`: Term-A case extends the coloring inductively - `vizingAdjacencyLemma`: Handles both cases for extending one edge - `vizingUpperBound_aux`: Framework for full inductive proof - `edge_eq_of_color_eq`: Distinctness of edges with same color ## Testing All four modules compile with no `sorry` nor errors or warnings. ## References * V. G. Vizing, *On an estimate of the chromatic class of a p-graph*, Diskret. Analiz. 3 (1964), 25–30. ## Co-authors Co-authored-by: Daniel Raggi Co-authored-by: Aristotle (Harmonic) Co-authored-by: Claude Opus 4.5 & 4.6 --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-combinatorics new-contributor LLM-generated 1915/0 Mathlib.lean,Mathlib/Combinatorics/SimpleGraph/Coloring/EdgeColoring.lean,Mathlib/Combinatorics/SimpleGraph/Coloring/KempeChain.lean,Mathlib/Combinatorics/SimpleGraph/Coloring/VizingFan.lean,Mathlib/Combinatorics/SimpleGraph/Coloring/VizingTheorem.lean 5 3 ['github-actions'] nobody
4-75004
4 days ago
4-80050
4 days ago
4-81140
4 days
39369 pd4st8hb95-hub
author:pd4st8hb95-hub
 feat: add basic fuzzy set definitions This PR adds a minimal `FuzzySet` API in `Mathlib/Order/FuzzySet`. A fuzzy set is represented as an abbreviation: `FuzzySet α L := α → L` The file provides basic definitions and lemmas: - `degree` - `support` - `core` - `weakCut` - `strongCut` - membership simp lemmas - extensionality - basic monotonicity lemmas for weak and strong cuts This PR intentionally does not add complement, union/intersection-specific API, normal or convex fuzzy sets, fuzzy relations, or advanced fuzzy set theory. Validation: - `lake build Mathlib.Order.FuzzySet` - `#lint only docBlame docBlameThm` Feedback on whether `Mathlib/Order/FuzzySet.lean` is the right location for this minimal API would be appreciated. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-order new-contributor 169/0 Mathlib.lean,Mathlib/Order/FuzzySet.lean 2 6 ['github-actions', 'grunweg', 'pd4st8hb95-hub', 'wwylele'] nobody
4-72288
4 days ago
6-29518
6 days ago
6-29589
6 days
26479 thefundamentaltheor3m
author:thefundamentaltheor3m
 feat(Analysis/Complex/CauchyIntegral): Cauchy–Goursat for Unbounded Rectangles In this PR, we prove versions of the Cauchy-Goursat theorem where the contours in question are rectangular and unbounded (ie, where the contours look like the $\bigsqcup$ symbol). I am not sure if I have formalised these in the best way, or if `Analysis.Complex.CauchyIntegral` is the best place for them (it might be prudent to reorganise the file into multiple files at some point), but I believe this is a useful result. Suggestions welcome. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor t-analysis sphere-packing 219/0 Mathlib/Analysis/Complex/CauchyIntegral.lean 1 7 ['github-actions', 'j-loreaux', 'loefflerd', 'mathlib4-merge-conflict-bot', 'thefundamentaltheor3m', 'wwylele'] urkud
assignee:urkud
4-61996
4 days ago
4-61996
4 days ago
38-72929
38 days
39183 yuanyi-350
author:yuanyi-350
 refactor(Analysis): golf `Mathlib/Analysis/Complex/Exponential` - shortens the reindexing step in `norm_exp_sub_sum_le_norm_mul_exp` by switching from `sum_bij` to `sum_Ico_eq_sum_range` with `simp` Extracted from #37968 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) codex t-analysis LLM-generated maintainer-merge 8/23 Mathlib/Analysis/Complex/Exponential.lean 1 4 ['Komyyy', 'github-actions', 'yuanyi-350'] urkud
assignee:urkud
4-59489
4 days ago
4-59677
4 days ago
11-40996
11 days
39000 CBirkbeck
author:CBirkbeck
 feat(NumberTheory/ModularForms): Sturm bound for finite-index subgroups Sturm bound for arithmetic subgroups of `GL(2, ℝ)` commensurable with `SL(2, ℤ)`: a modular form whose q-expansion at the cusp `∞` has order strictly greater than `k · [𝒮ℒ : 𝒢] / 12` is identically zero. Lifted from the level-one case (#38993) via the modular norm map. Final piece of a 5-PR split; all helper machinery is split out into the dependencies below. ## Main results - `ModularForm.sturm_bound_finiteIndex`: order-based Sturm bound for arithmetic subgroups. - `ModularForm.sturm_bound_finiteIndex_SL2Z`: specialisation to finite-index subgroups of `SL(2, ℤ)`. - `finiteDimensional_modularForm_finiteIndex`: a `Module.Finite ℂ (ModularForm 𝒢 k)` instance. - [ ] depends on: #39083 (helpers in Order, Periodic, QExpansion, NormTrace) - [ ] depends on: #39086 (galoisProd machinery) - [ ] depends on: #39087 (integer cusp width + T-pow slash action) - [ ] depends on: #39088 (norm map decomposition) - [ ] depends on: #38993 (level-one Sturm bound) This PR was done with the help of Claude Code. t-number-theory blocked-by-other-PR LLM-generated 860/21 Mathlib.lean,Mathlib/Analysis/Analytic/Order.lean,Mathlib/Analysis/Complex/Periodic.lean,Mathlib/NumberTheory/ModularForms/CuspFormSubmodule.lean,Mathlib/NumberTheory/ModularForms/Cusps.lean,Mathlib/NumberTheory/ModularForms/Identities.lean,Mathlib/NumberTheory/ModularForms/LevelOne/DimensionFormula.lean,Mathlib/NumberTheory/ModularForms/NormTrace.lean,Mathlib/NumberTheory/ModularForms/QExpansion.lean,Mathlib/NumberTheory/ModularForms/SturmBound.lean 10 3 ['github-actions', 'mathlib-dependent-issues', 'mathlib-merge-conflicts'] nobody
4-56870
4 days ago
unknown
0-0
0 seconds
39086 CBirkbeck
author:CBirkbeck
 feat(NumberTheory/ModularForms): Galois product machinery Adds the `galoisProd` construction and its analytic / order properties to `NormTrace.lean`. Used in the finite-index Sturm bound proof. ## Main additions - `galoisProd N f τ = ∏ j < N, f (j/N +ᵥ τ)`. - `galoisProd_periodic_one`, `galoisProd_mdiff`, `galoisProd_isBoundedAtImInfty`. - `cuspFunction_one_galoisProd_pow_eq`: pulled back through `qParam`, `galoisProd` is `(cuspFunction f)^N`. - `qExpansion_one_galoisProd_order_eq_qExpansion_self_order`: `galoisProd N f` and `f` have the same q-expansion order. - [ ] depends on: #39083 This PR was done with the help of Claude Code. blocked-by-other-PR LLM-generated 363/21 Mathlib/Analysis/Analytic/Order.lean,Mathlib/Analysis/Complex/Periodic.lean,Mathlib/NumberTheory/ModularForms/CuspFormSubmodule.lean,Mathlib/NumberTheory/ModularForms/LevelOne/DimensionFormula.lean,Mathlib/NumberTheory/ModularForms/NormTrace.lean,Mathlib/NumberTheory/ModularForms/QExpansion.lean 6 3 ['github-actions', 'mathlib-dependent-issues', 'mathlib-merge-conflicts'] nobody
4-56652
4 days ago
unknown
0-0
0 seconds
39087 CBirkbeck
author:CBirkbeck
 feat(NumberTheory/ModularForms): integer cusp width and T-power slash action Adds the integer cusp width and `T^j` slash-action computation, both needed by the finite-index Sturm bound. ## Main additions - `Mathlib/NumberTheory/ModularForms/Cusps.lean`: - `Subgroup.integerCuspWidth 𝒢`: the smallest positive integer in `𝒢.strictPeriods`. - `integerCuspWidth_pos`, `integerCuspWidth_mem_strictPeriods`, `T_zpow_integerCuspWidth_mem`, `quotient_T_pow_injective_integerCuspWidth`, `integerCuspWidth_eq_nat_mul_strictWidthInfty`. - `Mathlib/NumberTheory/ModularForms/Identities.lean`: - `slash_T_zpow_apply_general`: `(g ∣[k] T^j) τ = g (j +ᵥ τ)`. - [ ] depends on: #39083 This PR was done with the help of Claude Code. blocked-by-other-PR LLM-generated 346/21 Mathlib/Analysis/Analytic/Order.lean,Mathlib/Analysis/Complex/Periodic.lean,Mathlib/NumberTheory/ModularForms/CuspFormSubmodule.lean,Mathlib/NumberTheory/ModularForms/Cusps.lean,Mathlib/NumberTheory/ModularForms/Identities.lean,Mathlib/NumberTheory/ModularForms/LevelOne/DimensionFormula.lean,Mathlib/NumberTheory/ModularForms/NormTrace.lean,Mathlib/NumberTheory/ModularForms/QExpansion.lean 8 3 ['github-actions', 'mathlib-dependent-issues', 'mathlib-merge-conflicts'] nobody
4-56649
4 days ago
unknown
0-0
0 seconds
39088 CBirkbeck
author:CBirkbeck
 feat(NumberTheory/ModularForms): norm map decomposition for Sturm bound Decomposes the modular norm map `ModularForm.norm 𝒮ℒ f` as `galoisProd N f` times a "rest" factor analytic at the cusp, and shows the resulting q-expansion order at width 1 is at least the order of `f` at its natural cusp width. Used in the finite-index Sturm bound proof. ## Main additions - `quotientFunc_T_pow_apply`, `image_T_pow_invariant_under_T_mul/_smul`, `image_T_pow_smul_inv_iff`: action of `T^j` on the cosets used in the norm map. - `prod_quotientFunc_filter_image_one_vadd`: regrouping of the norm-map product. - `analyticAt_cuspFunction_one_norm_rest`: the rest factor is analytic at `0`. - [ ] depends on: #39086 (galoisProd machinery) - [ ] depends on: #39087 (integer cusp width + T-pow slash action) This PR was done with the help of Claude Code. blocked-by-other-PR LLM-generated 723/21 Mathlib/Analysis/Analytic/Order.lean,Mathlib/Analysis/Complex/Periodic.lean,Mathlib/NumberTheory/ModularForms/CuspFormSubmodule.lean,Mathlib/NumberTheory/ModularForms/Cusps.lean,Mathlib/NumberTheory/ModularForms/Identities.lean,Mathlib/NumberTheory/ModularForms/LevelOne/DimensionFormula.lean,Mathlib/NumberTheory/ModularForms/NormTrace.lean,Mathlib/NumberTheory/ModularForms/QExpansion.lean 8 3 ['github-actions', 'mathlib-dependent-issues', 'mathlib-merge-conflicts'] nobody
4-56648
4 days ago
unknown
0-0
0 seconds
39083 CBirkbeck
author:CBirkbeck
 feat(Mathlib): preparations for finite-index Sturm bound Stand-alone helpers extracted from #39000 (Sturm bound for finite-index subgroups). First of a 5-PR split. ## Main additions - `Mathlib/Analysis/Analytic/Order.lean`: `analyticOrderAt_prod`, `analyticOrderAt_comp_pow_zero`. - `Mathlib/Analysis/Complex/Periodic.lean`: `Periodic.qParam_sub`. - `Mathlib/NumberTheory/ModularForms/QExpansion.lean`: `qExpansion_order_eq_analyticOrderAt_cuspFunction`, `qExpansion_order_le_qExpansion_nat_mul_order`. - `Mathlib/NumberTheory/ModularForms/NormTrace.lean`: `quotientFunc_mdiff`, `quotientFunc_isBoundedAtImInfty`. This PR was done with the help of Claude Code. LLM-generated 195/21 Mathlib/Analysis/Analytic/Order.lean,Mathlib/Analysis/Complex/Periodic.lean,Mathlib/NumberTheory/ModularForms/CuspFormSubmodule.lean,Mathlib/NumberTheory/ModularForms/LevelOne/DimensionFormula.lean,Mathlib/NumberTheory/ModularForms/NormTrace.lean,Mathlib/NumberTheory/ModularForms/QExpansion.lean 6 3 ['github-actions', 'mathlib-bors', 'mathlib-merge-conflicts'] nobody
4-56644
4 days ago
14-26780
14 days ago
0-1178
19 minutes
33369 Thmoas-Guan
author:Thmoas-Guan
 feat(Homology): `Ext` commute with flat base change In this PR, using the linear map `Ext(M,N) => Ext(F(M), F(N))` when `F` is exact functor, we prove that `Ext` commute with flat base change if the ring is noetherian and two modules are finitely generated, stated using `IsBaseChange`. --- - [x] depends on: #31046 - [ ] depends on: #31222 - [x] depends on: #32316 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) large-import blocked-by-other-PR t-topology 432/0 Mathlib.lean,Mathlib/Algebra/Category/ModuleCat/Ext/BaseChange.lean,Mathlib/Algebra/Module/FinitePresentation.lean 3 5 ['github-actions', 'mathlib-merge-conflicts', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
4-54350
4 days ago
144-35868
144 days ago
0-1554
25 minutes
39133 Thmoas-Guan
author:Thmoas-Guan
 feat(Algebra/ModuleCat): exactness of restrictScalars for general universe level Currently exactness of `ModuleCat.restrictScalars` is synth via being adjoint functor, however this needs the universe level to be some `max u v` where `u` is the universe level of the ring. Here we provide exactness of restrictScalars for general universe level using it preserves short exact sequence. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra
label:t-algebra$
 46/0 Mathlib.lean,Mathlib/Algebra/Category/ModuleCat/ChangeOfRingsExact.lean 2 1 ['github-actions'] nobody
4-53835
4 days ago
12-63202
12 days ago
12-62913
12 days
31768 Thmoas-Guan
author:Thmoas-Guan
 feat(Homology): `Ext` under restrict scalars by `RingEquiv` In this PR, we proved that `Ext` commute with ulift functor in `ModuleCat`. Further more, we provided compatibility with (semi-)linear equiv of general universe. --- - [ ] depends on: #39133 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra t-category-theory blocked-by-other-PR
label:t-algebra$
 142/0 Mathlib.lean,Mathlib/Algebra/Category/ModuleCat/ChangeOfRings.lean,Mathlib/Algebra/Category/ModuleCat/ChangeOfRingsExact.lean,Mathlib/Algebra/Category/ModuleCat/Ext/RingEquiv.lean 4 31 ['Thmoas-Guan', 'dagurtomas', 'github-actions', 'joelriou', 'mathlib-dependent-issues', 'mathlib-merge-conflicts', 'mathlib4-merge-conflict-bot'] kim-em
assignee:kim-em
4-53821
4 days ago
12-62621
12 days ago
21-43952
21 days
31851 Thmoas-Guan
author:Thmoas-Guan
 feat(Algebra/Homology): Injective dimension in linear equiv In this PR, we proved that injective dimension is preserved under (semi-) linear equiv for general universe level. --- - [ ] depends on: #31768 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra blocked-by-other-PR
label:t-algebra$
 376/0 Mathlib.lean,Mathlib/Algebra/Category/ModuleCat/ChangeOfRings.lean,Mathlib/Algebra/Category/ModuleCat/ChangeOfRingsExact.lean,Mathlib/Algebra/Category/ModuleCat/Ext/Baer.lean,Mathlib/Algebra/Category/ModuleCat/Ext/RingEquiv.lean,Mathlib/Algebra/Category/ModuleCat/InjectiveDimension.lean,Mathlib/Algebra/Homology/ShortComplex/ModuleCat.lean 7 8 ['github-actions', 'mathlib-merge-conflicts', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
4-53807
4 days ago
183-21566
183 days ago
0-8108
2 hours
39434 Paul-Lez
author:Paul-Lez
 feat: add Faa Di Bruno helper results WIP This PR adds a few helper results for the Faa Di Bruno theorem - the motivation for adding those is work I've been doing at the ICERM analysis workshop on defining jet bundles, which requires proving some vanishing results for higher order derivatives. ~~One question for review: currently a few of the results are stated for `(s ∩ u)` - do people think this is useful? Or would it be worth just stating the results for `u` directly?~~ Actually after a bit of thinking I'm not super happy with this approach, so I'm going to remove these. There's also one or two other lemmas I'd like to add before someone takes a look at these! AI usage: I used codex for part of the work on this (stating some of the results, based on some precise prompting I gave), and checked the content carefully and spent some time golfing proofs and so on (all of this before the first commit). --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-analysis WIP 79/1 Mathlib/Analysis/Calculus/ContDiff/FaaDiBruno.lean 1 1 ['github-actions'] nobody
4-50518
4 days ago
6-7439
6 days ago
0-84707
23 hours
31884 Thmoas-Guan
author:Thmoas-Guan
 feat(RingTheory): definition of Gorenstein local ring In this PR, we gave basic definition of Gorenstein local ring and Gorestein ring and prove that they are stable under ring equiv. --- - [ ] depends on: #31851 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) blocked-by-other-PR t-ring-theory 449/0 Mathlib.lean,Mathlib/Algebra/Category/ModuleCat/ChangeOfRings.lean,Mathlib/Algebra/Category/ModuleCat/ChangeOfRingsExact.lean,Mathlib/Algebra/Category/ModuleCat/Ext/Baer.lean,Mathlib/Algebra/Category/ModuleCat/Ext/RingEquiv.lean,Mathlib/Algebra/Category/ModuleCat/InjectiveDimension.lean,Mathlib/Algebra/Homology/ShortComplex/ModuleCat.lean,Mathlib/RingTheory/Gorenstein/Defs.lean 8 10 ['github-actions', 'mathlib-merge-conflicts', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
4-50348
4 days ago
182-38504
182 days ago
0-2574
42 minutes
32098 Thmoas-Guan
author:Thmoas-Guan
 feat(RingTheory): injective dimension of quotSMulTop In this PR, we proved for finitely generated module `M` over noetherian ring `R`, if `x` in maximal ideal being both `R`-regular and `M`-regular, `injdim_R (M/xM) + 1 = injdim_{R/(x)} (M)`. --- - [ ] depends on: #32058 - [ ] depends on: #39133 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) blocked-by-other-PR t-ring-theory 663/0 Mathlib.lean,Mathlib/Algebra/Category/ModuleCat/ChangeOfRingsExact.lean,Mathlib/Algebra/Category/ModuleCat/Ext/Baer.lean,Mathlib/Algebra/Homology/ShortComplex/ModuleCat.lean,Mathlib/RingTheory/Regular/InjectiveDimension.lean 5 7 ['github-actions', 'mathlib-merge-conflicts', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
4-50309
4 days ago
178-29497
178 days ago
0-2059
34 minutes
35122 Marygold-Dusk
author:Marygold-Dusk
 feat: define C^n submersions This PR defines submersions between C^n manifolds. In the infinite-dimensional setting, submersions are defined via local normal forms rather than surjectivity of the mfderiv. A map f is a submersion at x if, in suitable charts around x and f x, it has the form (u, v) ↦ u after identifying the model space with a product. We prove a few basic properties: - being a submersion is a local property, - products of submersions are submersions, - the set of submersed points is open Future PRs will prove that submersions are C^n and deduce equivalence with the standard definition in finite dimensions. From the path towards the regular value theorem. This file was developed under the supervision of Michael Rothgang. Co-authored-by: Michael Rothgang --- Most of the design is analogues to immersions. t-differential-geometry new-contributor 642/0 Mathlib.lean,Mathlib/Geometry/Manifold/Submersion.lean,docs/references.bib 3 54 ['Marygold-Dusk', 'chrisflav', 'github-actions', 'grunweg'] PatrickMassot and grunweg
assignee:grunweg assignee:PatrickMassot
4-50184
4 days ago
4-50184
4 days ago
48-70429
48 days
39447 Paul-Lez
author:Paul-Lez
 feat: define map from PowerSeries to FormalMultilinearSeries WIP: I'm not fully happy with the design yet and would like to change a few things around **before** anyone takes a look for review! This PR defines a map from `PowerSeries R` to `FormalMultilinearSeries R A A`, and proves that this map preserves addition and composition. Co-authored-by: Xavier Genereux --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) WIP t-ring-theory 181/0 Mathlib/RingTheory/PowerSeries/ToFormalMultilinearSeries.lean 1 1 ['github-actions'] nobody
4-48184
4 days ago
6-82879
6 days ago
0-23
23 seconds
39475 ADedecker
author:ADedecker
 feat: define LinearMap.QuasiInverse If the name "QuasiInverse" is considered too vague, I am open to suggestions. This was written by @PatrickMassot and @CoolRmal at the May 2026 ICERM workshop as part of the project on Fredholm operators. --- - [ ] depends on: #39468 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra blocked-by-other-PR
label:t-algebra$
 347/8 Mathlib.lean,Mathlib/Algebra/Module/Submodule/Ker.lean,Mathlib/Algebra/Module/Submodule/Map.lean,Mathlib/Algebra/Module/Submodule/Range.lean,Mathlib/LinearAlgebra/FiniteRankLinearMap.lean 5 2 ['github-actions', 'mathlib-dependent-issues'] nobody
4-44410
4 days ago
6-7111
6 days ago
0-1118
18 minutes
37624 IvanRenison
author:IvanRenison
 feat(Combinatorics/SimpleGraph/Maps): add theorems about composition --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-combinatorics maintainer-merge 32/5 Mathlib/Combinatorics/SimpleGraph/Ends/Defs.lean,Mathlib/Combinatorics/SimpleGraph/Maps.lean 2 11 ['IvanRenison', 'YaelDillies', 'github-actions'] nobody
4-42820
4 days ago
6-11009
6 days ago
47-47514
47 days
37010 pion2024
author:pion2024
 `Sl2`update: add theorem `finrank_weightSpace_eq_one_of_isIrreducible` # Background: I am a 2nd year undergrad student in mathematics currently self-teaching Lie algebra and representation theory. Before starting the formalization, I searched for related keywords on Zulip and in the GitHub issues and commits. As far as I could tell, there were no existing results or ongoing attempts before I started. All feedback is welcome. Even a quick check on the statement design/an idea on the generalization (cf Limitations below) would be incredibly helpful. # Overview In this PR, I added the new section `IsAlgClosedIrreducible` which formalizes the well-known theorem `finrank_weightSpace_eq_one_of_isIrreducible` for the Lie algebra $\mathfrak{sl}_2$ step by step. It proves that for a finite-dimensional irreducible representation of $\mathfrak{sl}_2$ over an algebraically closed field $K$ of characteristic zero, every non-trivial weight space has a dimension of exactly 1. # Formalization Structure : Instead of relying on explicit finite sums (`Finset.sum`) and manipulating coefficients, I heavily leverage Mathlib's abstractions in Submodule Lattice Theory and Coordinate-free Linear Algebra. The formalization proceeds in the following logic: 1. Existence of a Primitive Vector (`exists_primitiveVector`): I construct a primitive (highest-weight) vector by showing that repeated applications of the raising operator $e$ must eventually yield zero due to the finite-dimensionality of $M$ and the linear independence of eigenvectors corresponding to distinct eigenvalues. 2. The span of $f$-Tower as a Lie Submodule equals to the whole space (`fTowerLieSubmodule_eq_top`): I define the $f$-tower submodule as the $K$-span of $\{f^k m \mid k \in \mathbb{N}\}$. By proving its closure under the action of $f, h$, and $e$, I establish it as a Lie submodule. Since $M$ is irreducible, this submodule must be the entire space ($\top$). 3. Submodule Lattice Operations (`exists_mem_fTower_of_weightSpace_ne_bot`): To prove that every weight in $M$ is of the form $\mu_0 - 2k$, I use lattice operations (iSup, inf, and Disjoint) to avoid element-wise tracking. Since the $f$-tower spans $M$, the supremum of its weight spaces is $\top$. By leveraging `Module.End.eigenspaces_iSupIndep`, I show that any arbitrary non-trivial weight space would have a trivial intersection with $\top$ if its weight didn't belong to the sequence, yielding a contradiction. 4. Dimension Calculation via Basis Equivalence (`finrank_weightSpace_eq_one_of_isIrreducible`): Finally, I construct a basis from the non-zero elements of the $f$-tower. To show the weight space is 1-dimensional, I use `Basis.equivFun` to compare coefficients algebraically. This avoids heavy manual indexing and index-shifting, proving that any vector in the weight space $\mu_0 - 2k$ is merely a scalar multiple of $f^k m$. # Use of AI: I used Gemini 3.1 Pro for tactics, theorems, improvement suggestions, and error explanations. I fully understand and can vouch for all the modifications I have made to the file. # Limitations: I only managed to formalize the finite-dimensional version, although the theorem also holds in the infinite-dimensional case. In the infinite case the existence of a primitive vector is not guaranteed. A quick search suggests that we might need heavy tools like Casimir operators and the universal enveloping algebra, which are totally beyond my current level. I am looking into it, but since there is a significant mathematical gap, I thought it would be best to get this finite-dimensional version merged first. new-contributor t-algebra large-import awaiting-author merge-conflict
label:t-algebra$
 336/0 Mathlib/Algebra/Lie/Sl2.lean 1 11 ['github-actions', 'mathlib-bors', 'mathlib-merge-conflicts', 'ocfnash', 'pion2024'] ocfnash
assignee:ocfnash
4-41760
4 days ago
51-22397
51 days ago
2-57577
2 days
33377 Thmoas-Guan
author:Thmoas-Guan
 feat(RingTheory): polynomial over Gorenstein ring is Gorenstein In this PR, we prove that polynomial over Gorenstein ring is Gorenstein. --- - [ ] depends on: #33369 - [ ] depends on: #31884 - [ ] depends on: #32098 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) large-import blocked-by-other-PR t-ring-theory 1533/0 Mathlib.lean,Mathlib/Algebra/Category/ModuleCat/ChangeOfRings.lean,Mathlib/Algebra/Category/ModuleCat/ChangeOfRingsExact.lean,Mathlib/Algebra/Category/ModuleCat/Ext/Baer.lean,Mathlib/Algebra/Category/ModuleCat/Ext/BaseChange.lean,Mathlib/Algebra/Category/ModuleCat/Ext/RingEquiv.lean,Mathlib/Algebra/Category/ModuleCat/InjectiveDimension.lean,Mathlib/Algebra/Homology/ShortComplex/ModuleCat.lean,Mathlib/Algebra/Module/FinitePresentation.lean,Mathlib/RingTheory/Gorenstein/Defs.lean,Mathlib/RingTheory/Gorenstein/Polynomial.lean,Mathlib/RingTheory/Regular/InjectiveDimension.lean 12 10 ['github-actions', 'mathlib-merge-conflicts', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
4-40437
4 days ago
144-29860
144 days ago
0-107
1 minute
39526 chrisflav
author:chrisflav
 feat(CategoryTheory/Sites): definition of hypercovers This is WIP. Co-authored by: Robin Carlier --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-category-theory t-algebraic-topology 905/0 Mathlib/AlgebraicTopology/SimplicialObject/Cotensor.lean 1 1 ['github-actions'] nobody
4-39215
4 days ago
unknown
0-0
0 seconds
38950 smmercuri
author:smmercuri
 chore(Algebra): `coe_algHom` -> `coe_toAlgHom` --- There are also instances of `coe_ringHom`, `coe_linearMap` etc which I can fix in follow-up PRs [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) 78/64 Mathlib/Algebra/Algebra/Equiv.lean,Mathlib/Algebra/Algebra/Spectrum/Basic.lean,Mathlib/Algebra/Algebra/Subalgebra/Centralizer.lean,Mathlib/Algebra/Azumaya/Basic.lean,Mathlib/Algebra/MvPolynomial/Equiv.lean,Mathlib/AlgebraicGeometry/AffineSpace.lean,Mathlib/Analysis/CStarAlgebra/GelfandDuality.lean,Mathlib/FieldTheory/Extension.lean,Mathlib/FieldTheory/Galois/Basic.lean,Mathlib/FieldTheory/Isaacs.lean,Mathlib/FieldTheory/KummerExtension.lean,Mathlib/FieldTheory/LinearDisjoint.lean,Mathlib/FieldTheory/Minpoly/Field.lean,Mathlib/FieldTheory/SeparableDegree.lean,Mathlib/FieldTheory/SeparablyGenerated.lean,Mathlib/LinearAlgebra/Charpoly/Basic.lean,Mathlib/LinearAlgebra/TensorProduct/Subalgebra.lean,Mathlib/NumberTheory/Cyclotomic/Gal.lean,Mathlib/RingTheory/Algebraic/MvPolynomial.lean,Mathlib/RingTheory/Bialgebra/Equiv.lean,Mathlib/RingTheory/Bialgebra/Hom.lean,Mathlib/RingTheory/DividedPowerAlgebra/Init.lean,Mathlib/RingTheory/Extension/Presentation/Basic.lean,Mathlib/RingTheory/Extension/Presentation/Core.lean,Mathlib/RingTheory/GradedAlgebra/AlgHom.lean,Mathlib/RingTheory/GradedAlgebra/TensorProduct.lean,Mathlib/RingTheory/Ideal/Quotient/Operations.lean,Mathlib/RingTheory/MvPolynomial/Symmetric/FundamentalTheorem.lean,Mathlib/RingTheory/NoetherNormalization.lean,Mathlib/RingTheory/Polynomial/Cyclotomic/Factorization.lean,Mathlib/RingTheory/Smooth/Basic.lean,Mathlib/RingTheory/Smooth/IntegralClosure.lean,Mathlib/RingTheory/TensorProduct/Maps.lean 33 5 ['github-actions', 'j-loreaux'] nobody
4-38424
4 days ago
4-38205
4 days ago
15-8982
15 days
33379 Thmoas-Guan
author:Thmoas-Guan
 feat(RingTheory): Gorenstein local ring is Cohen Macaulay In this PR, we give the definition of Gorenstein local ring and proved it is Cohen--Macaulay. --- - [ ] depends on: #31884 - [ ] depends on: #26218 - [ ] depends on: #32098 - [ ] depends on: #31644 - [ ] depends on: #33369 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) large-import blocked-by-other-PR t-ring-theory 3764/27 Mathlib.lean,Mathlib/Algebra/Category/ModuleCat/Basic.lean,Mathlib/Algebra/Category/ModuleCat/ChangeOfRings.lean,Mathlib/Algebra/Category/ModuleCat/ChangeOfRingsExact.lean,Mathlib/Algebra/Category/ModuleCat/Ext/Baer.lean,Mathlib/Algebra/Category/ModuleCat/Ext/BaseChange.lean,Mathlib/Algebra/Category/ModuleCat/Ext/Basic.lean,Mathlib/Algebra/Category/ModuleCat/Ext/RingEquiv.lean,Mathlib/Algebra/Category/ModuleCat/InjectiveDimension.lean,Mathlib/Algebra/Homology/ShortComplex/ModuleCat.lean,Mathlib/Algebra/Module/FinitePresentation.lean,Mathlib/RingTheory/CohenMacaulay/Basic.lean,Mathlib/RingTheory/Depth/Basic.lean,Mathlib/RingTheory/Depth/Ischebeck.lean,Mathlib/RingTheory/Depth/Rees.lean,Mathlib/RingTheory/Gorenstein/CohenMacaulay.lean,Mathlib/RingTheory/Gorenstein/Defs.lean,Mathlib/RingTheory/Ideal/KrullsHeightTheorem.lean,Mathlib/RingTheory/Ideal/Maps.lean,Mathlib/RingTheory/Regular/InjectiveDimension.lean,Mathlib/RingTheory/Regular/LinearMap.lean,docs/references.bib 22 13 ['github-actions', 'mathlib-merge-conflicts', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
4-37904
4 days ago
144-28948
144 days ago
0-264
4 minutes
36527 Thmoas-Guan
author:Thmoas-Guan
 feat(RingTheory): Gorenstein of exists a vanishing ext A `n`-dimensional Noetherian local ring `R` is Gorenstein if there is an `i > n`, `Ext^i(k, R) = 0`. --- - [ ] depends on: #33379 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) large-import blocked-by-other-PR t-ring-theory 3946/27 Mathlib.lean,Mathlib/Algebra/Category/ModuleCat/Basic.lean,Mathlib/Algebra/Category/ModuleCat/ChangeOfRings.lean,Mathlib/Algebra/Category/ModuleCat/ChangeOfRingsExact.lean,Mathlib/Algebra/Category/ModuleCat/Ext/Baer.lean,Mathlib/Algebra/Category/ModuleCat/Ext/BaseChange.lean,Mathlib/Algebra/Category/ModuleCat/Ext/Basic.lean,Mathlib/Algebra/Category/ModuleCat/Ext/RingEquiv.lean,Mathlib/Algebra/Category/ModuleCat/InjectiveDimension.lean,Mathlib/Algebra/Homology/ShortComplex/ModuleCat.lean,Mathlib/Algebra/Module/FinitePresentation.lean,Mathlib/RingTheory/CohenMacaulay/Basic.lean,Mathlib/RingTheory/Depth/Basic.lean,Mathlib/RingTheory/Depth/Ischebeck.lean,Mathlib/RingTheory/Depth/Rees.lean,Mathlib/RingTheory/Gorenstein/CohenMacaulay.lean,Mathlib/RingTheory/Gorenstein/Defs.lean,Mathlib/RingTheory/Ideal/KrullsHeightTheorem.lean,Mathlib/RingTheory/Ideal/Maps.lean,Mathlib/RingTheory/Regular/InjectiveDimension.lean,Mathlib/RingTheory/Regular/LinearMap.lean,docs/references.bib 22 9 ['github-actions', 'mathlib-dependent-issues', 'mathlib-merge-conflicts'] nobody
4-37637
4 days ago
71-33383
71 days ago
0-2167
36 minutes
38721 tb65536
author:tb65536
 feat(GroupTheory/Torsion): the torsion subgroup is preserved by isomorphisms This PR proves that the torsion subgroup is preserved by isomorphisms. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra t-group-theory
label:t-algebra$
 21/3 Mathlib/GroupTheory/Torsion.lean,Mathlib/NumberTheory/NumberField/Cyclotomic/Basic.lean,Mathlib/NumberTheory/NumberField/Cyclotomic/Three.lean,Mathlib/NumberTheory/NumberField/Units/Basic.lean 4 5 ['github-actions', 'mathlib-merge-conflicts', 'riccardobrasca', 'tb65536'] riccardobrasca
assignee:riccardobrasca
4-37488
4 days ago
4-37549
4 days ago
21-48488
21 days
33380 Thmoas-Guan
author:Thmoas-Guan
 feat(RingTheory): Gorenstein local ring is Cohen--Macaulay local ring of type one In this PR, we formalized Theorem 18.1 of _Commutaive Ring Theory_ Matsumura. This gives a full characterization of `Ext(k, R)` for Gorenstein local ring and implies that it is equivalent to Cohen--Macaulay local ring of type 1. --- - [ ] depends on: #26245 - [ ] depends on: #33379 - [ ] depends on: #36527 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) large-import blocked-by-other-PR t-ring-theory 5060/163 Mathlib.lean,Mathlib/Algebra/Category/ModuleCat/Basic.lean,Mathlib/Algebra/Category/ModuleCat/ChangeOfRings.lean,Mathlib/Algebra/Category/ModuleCat/ChangeOfRingsExact.lean,Mathlib/Algebra/Category/ModuleCat/Ext/Baer.lean,Mathlib/Algebra/Category/ModuleCat/Ext/BaseChange.lean,Mathlib/Algebra/Category/ModuleCat/Ext/Basic.lean,Mathlib/Algebra/Category/ModuleCat/Ext/RingEquiv.lean,Mathlib/Algebra/Category/ModuleCat/InjectiveDimension.lean,Mathlib/Algebra/Homology/ShortComplex/ModuleCat.lean,Mathlib/Algebra/Module/FinitePresentation.lean,Mathlib/AlgebraicGeometry/Properties.lean,Mathlib/RingTheory/CohenMacaulay/Basic.lean,Mathlib/RingTheory/CohenMacaulay/Catenary.lean,Mathlib/RingTheory/Depth/Basic.lean,Mathlib/RingTheory/Depth/Ischebeck.lean,Mathlib/RingTheory/Depth/Rees.lean,Mathlib/RingTheory/Gorenstein/CohenMacaulay.lean,Mathlib/RingTheory/Gorenstein/Defs.lean,Mathlib/RingTheory/Ideal/Height.lean,Mathlib/RingTheory/Ideal/KrullsHeightTheorem.lean,Mathlib/RingTheory/Ideal/Maps.lean,Mathlib/RingTheory/KrullDimension/PID.lean,Mathlib/RingTheory/Regular/InjectiveDimension.lean,Mathlib/RingTheory/Regular/LinearMap.lean,docs/references.bib 26 13 ['github-actions', 'mathlib-merge-conflicts', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
4-37226
4 days ago
144-28725
144 days ago
0-126
2 minutes
39075 Thmoas-Guan
author:Thmoas-Guan
 feat(Algebra/CommRingCat): colimit of local ring via local hom In this PR, we deal with filtered colimit of local ring via local homomorphisms, proving it is again local, with maximal ideal equal to the union of images of maximal ideals. Co-authored-by: Wang Jingting --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra
label:t-algebra$
 209/0 Mathlib.lean,Mathlib/Algebra/Category/Ring/FilteredColimitsLocal.lean 2 1 ['github-actions'] nobody
4-34554
4 days ago
14-34948
14 days ago
14-34776
14 days
39077 Thmoas-Guan
author:Thmoas-Guan
 feat(RingTheory): flat extension of local ring This PR mainly formalize the theorem [[Stacks 03C3](https://stacks.math.columbia.edu/tag/03C3)] for flat extension of local ring. --- - [ ] depends on: #39075 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-ring-theory blocked-by-other-PR WIP 804/0 Mathlib.lean,Mathlib/Algebra/Category/Ring/FilteredColimitsLocal.lean,Mathlib/RingTheory/Flat/Extension.lean 3 2 ['github-actions', 'mathlib-dependent-issues'] nobody
4-34543
4 days ago
14-33754
14 days ago
0-685
11 minutes
37975 Thmoas-Guan
author:Thmoas-Guan
 feat(RingTheory): AdicCompletion of local ring is local In this PR, we proved that AdicCompletion of local ring wrt the maximal ideal is local ring with maximal ideal equal to the map of the original maximal ideal. Also, removing some old junk produced by myself. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-ring-theory large-import 173/5 Mathlib/RingTheory/AdicCompletion/LocalRing.lean 1 15 ['BryceT233', 'Thmoas-Guan', 'github-actions'] alreadydone
assignee:alreadydone
4-34534
4 days ago
39-42968
39 days ago
39-54473
39 days
38331 Thmoas-Guan
author:Thmoas-Guan
 feat(RingTheory/AdicCompletion): AdicCompletion of Noetherian ring is Noetherian For `I` an ideal of `R`, if `R/I` is Noetherian and `I` is finitely generated, the the completion of `R` wrt `I` is Noetherian. --- - [ ] depends on: #37975 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-ring-theory large-import blocked-by-other-PR 449/7 Mathlib/RingTheory/AdicCompletion/LocalRing.lean,Mathlib/RingTheory/AdicCompletion/Noetherian.lean 2 2 ['github-actions', 'mathlib-dependent-issues'] nobody
4-34526
4 days ago
31-39111
31 days ago
0-496
8 minutes
36832 KryptosAI
author:KryptosAI
 chore(Data/Finset/Card): rename `pred_card_le_card_erase` to `sub_one_card_le_card_erase` ## Summary The name `pred_card_le_card_erase` suggests `Nat.pred` but the statement uses `- 1` (i.e., `Nat.sub 1`). Rename to `sub_one_card_le_card_erase` to match the actual statement. A deprecated alias is added for backwards compatibility. ### Files changed - `Mathlib/Data/Finset/Card.lean` — definition renamed + deprecated alias - `Mathlib/Data/Finset/Powerset.lean` — reference updated - `Mathlib/Combinatorics/Additive/SubsetSum.lean` — reference updated - `Mathlib/Algebra/Polynomial/EraseLead.lean` — reference updated Addresses the `Finset.pred_card_le_card_erase` item in #21584. ## AI disclosure I used Claude Code to explore the codebase (finding all references to rename) and to draft the PR description. I reviewed and understand all changes — these are straightforward renames with a deprecated alias. new-contributor awaiting-author 22/15 Mathlib/Algebra/Polynomial/EraseLead.lean,Mathlib/Combinatorics/Additive/SubsetSum.lean,Mathlib/Combinatorics/SetFamily/AhlswedeZhang.lean,Mathlib/Combinatorics/SetFamily/Shadow.lean,Mathlib/Data/Finset/Card.lean,Mathlib/Data/Finset/Powerset.lean,Mathlib/Data/Set/Card.lean,Mathlib/GroupTheory/Perm/Support.lean,Mathlib/RingTheory/Ideal/Operations.lean 9 8 ['KryptosAI', 'Multramate', 'dagurtomas', 'github-actions', 'mattrobball', 'ooovi'] nobody
4-34204
4 days ago
4-34204
4 days ago
59-48094
59 days
26923 oliver-butterley
author:oliver-butterley
 feat(Dynamics/BirkhoffSum): add the pointwise ergodic theorem (Birkhoff's) The Pointwise Ergodic Theorem, also known as Birkhoff's Ergodic Theorem. Co-authored-by: Lua Viana Reis - [x] depends on: #26074 - [x] depends on: #26807 - [x] depends on: #26810 - [x] depends on: #26840 - [x] depends on: #26842 - [x] depends on: #26848 - [x] depends on: #26851 - [x] depends on: #26852 - [x] depends on: #26853 - [x] depends on: #27008 - [x] depends on: #28901 Zulip: [PR thread](https://leanprover.zulipchat.com/#narrow/channel/144837-PR-reviews/topic/.2326923.20The.20pointwise.20ergodic.20theorem.20.28Birkhoff's.29/with/527835158) --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-dynamics new-contributor awaiting-author 398/0 Mathlib.lean,Mathlib/Dynamics/BirkhoffSum/Pointwise.lean 2 33 ['D-Thomine', 'github-actions', 'leanprover-community-bot-assistant', 'lua-vr', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot', 'rwst', 'sgouezel', 'urkud'] sgouezel
assignee:sgouezel
4-33778
4 days ago
157-7741
157 days ago
98-50945
98 days
39289 Thmoas-Guan
author:Thmoas-Guan
 feat(RingTheory): Cohen structure theorem In this PR, we prove the existence of coefficient ring by the following two cases: 1: for residue field with char zero, there is a section of the residue field 2: for positive char, there exists a Cohen ring Both can be applied to the last statement to obtain Cohen structure theorem. (In the version of [Stacks 0323](https://stacks.math.columbia.edu/tag/0323)) Co-authored-by: @BryceT233 --- - [ ] depends on: #28683 - [ ] depends on: #38331 - [ ] depends on: #39077 - [ ] depends on: #37838 - [ ] depends on: #37953 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-ring-theory large-import blocked-by-other-PR 2500/39 Mathlib.lean,Mathlib/Algebra/Category/Ring/FilteredColimitsLocal.lean,Mathlib/FieldTheory/SeparablyGenerated.lean,Mathlib/FieldTheory/TranscendentalSeparable.lean,Mathlib/RingTheory/AdicCompletion/LocalRing.lean,Mathlib/RingTheory/AdicCompletion/Noetherian.lean,Mathlib/RingTheory/CohenStructureTheorem.lean,Mathlib/RingTheory/Flat/Extension.lean,Mathlib/RingTheory/LocalRing/ResidueField/Ideal.lean,Mathlib/RingTheory/Nilpotent/GeometricallyReduced.lean,Mathlib/RingTheory/Smooth/Field.lean 11 4 ['github-actions', 'mathlib-dependent-issues', 'mathlib-merge-conflicts'] nobody
4-33522
4 days ago
9-46113
9 days ago
0-417
6 minutes
35561 Thmoas-Guan
author:Thmoas-Guan
 feat(RingTheory): power series over regular local ring In this PR, we proved that power series over regular local ring is again regular local ring. Same for finite multivariable power series. --- - [ ] depends on: #28682 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) WIP t-ring-theory 63/0 Mathlib.lean,Mathlib/RingTheory/RegularLocalRing/PowerSeries.lean 2 5 ['github-actions', 'mathlib-bors', 'mathlib-dependent-issues', 'mathlib-merge-conflicts'] nobody
4-33516
4 days ago
91-53541
91 days ago
0-5
5 seconds
35560 Thmoas-Guan
author:Thmoas-Guan
 feat(RingTheory): Corollaries of Cohen Structure Theorem Corollaries of Cohen structure theorem, saying that complete local ring can be represented as quotient of regular local ring. --- - [ ] depends on: #28683 - [ ] depends on: #35561 - [ ] depends on: #39289 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) blocked-by-other-PR large-import 3197/177 Mathlib.lean,Mathlib/Algebra/Category/Ring/FilteredColimitsLocal.lean,Mathlib/Algebra/Module/SpanRank.lean,Mathlib/AlgebraicGeometry/Properties.lean,Mathlib/FieldTheory/SeparablyGenerated.lean,Mathlib/FieldTheory/TranscendentalSeparable.lean,Mathlib/RingTheory/AdicCompletion/LocalRing.lean,Mathlib/RingTheory/AdicCompletion/Noetherian.lean,Mathlib/RingTheory/CohenStructureTheorem.lean,Mathlib/RingTheory/Filtration.lean,Mathlib/RingTheory/Flat/Extension.lean,Mathlib/RingTheory/Ideal/Height.lean,Mathlib/RingTheory/Ideal/KrullsHeightTheorem.lean,Mathlib/RingTheory/Ideal/Operations.lean,Mathlib/RingTheory/KrullDimension/PID.lean,Mathlib/RingTheory/LocalRing/ResidueField/Ideal.lean,Mathlib/RingTheory/Nilpotent/GeometricallyReduced.lean,Mathlib/RingTheory/RegularLocalRing/Basic.lean,Mathlib/RingTheory/RegularLocalRing/PowerSeries.lean,Mathlib/RingTheory/Smooth/Field.lean 20 10 ['BryceT233', 'github-actions', 'mathlib-bors', 'mathlib-dependent-issues', 'mathlib-merge-conflicts'] nobody
4-33478
4 days ago
91-53764
91 days ago
0-8
8 seconds
38938 lua-vr
author:lua-vr
 chore(ConditionallyCompleteLattice/Indexed): dualize --- - [ ] depends on: #38906 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) blocked-by-other-PR t-order 112/251 Mathlib/Order/ConditionallyCompleteLattice/Basic.lean,Mathlib/Order/ConditionallyCompleteLattice/Defs.lean,Mathlib/Order/ConditionallyCompleteLattice/Indexed.lean 3 6 ['github-actions', 'lua-vr', 'mathlib-dependent-issues', 'mathlib-merge-conflicts'] nobody
4-26643
4 days ago
unknown
0-0
0 seconds
39527 MichaelStollBayreuth
author:MichaelStollBayreuth
 chore: add shortcut instances for Rat, Complex --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) WIP slow-typeclass-synthesis t-algebra
label:t-algebra$
 6/0 Mathlib/Algebra/Ring/Rat.lean,Mathlib/Data/Complex/Basic.lean 2 3 ['MichaelStollBayreuth', 'github-actions', 'leanprover-radar'] nobody
4-26265
4 days ago
4-31840
4 days ago
0-2
2 seconds
39510 mbkybky
author:mbkybky
 WIP: any regular local ring is a UFD Show that any regular local ring is a unique factorization domain. - [ ] depends on: #29802 - [ ] depends on: #36739 - [ ] depends on: #39067 - [ ] depends on: #39420 --- Prepared with Codex [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) WIP t-ring-theory large-import blocked-by-other-PR 5154/177 Mathlib.lean,Mathlib/Algebra/Category/ModuleCat/Basic.lean,Mathlib/Algebra/Category/ModuleCat/Ext/Baer.lean,Mathlib/Algebra/Category/ModuleCat/Ext/Basic.lean,Mathlib/Algebra/Homology/ShortComplex/ModuleCat.lean,Mathlib/Algebra/Module/Equiv/Defs.lean,Mathlib/Algebra/Module/FiniteFreeResolution/Basic.lean,Mathlib/Algebra/Module/FiniteFreeResolution/Exact.lean,Mathlib/Algebra/Module/FiniteFreeResolution/HasProjectiveDimensionLE.lean,Mathlib/Algebra/Module/FiniteFreeResolution/Localization.lean,Mathlib/Algebra/Module/FinitePresentation.lean,Mathlib/Algebra/Module/LocalizedModule/Submodule.lean,Mathlib/Algebra/Module/SpanRank.lean,Mathlib/Algebra/Module/StablyFree/HasFiniteFreeResolution.lean,Mathlib/AlgebraicGeometry/Properties.lean,Mathlib/LinearAlgebra/Dimension/FreeAndStrongRankCondition.lean,Mathlib/LinearAlgebra/FiniteDimensional/Basic.lean,Mathlib/RingTheory/CohenMacaulay/Basic.lean,Mathlib/RingTheory/CohenMacaulay/Maximal.lean,Mathlib/RingTheory/Depth/AuslanderBuchsbaum.lean,Mathlib/RingTheory/Depth/Basic.lean,Mathlib/RingTheory/Depth/Ischebeck.lean,Mathlib/RingTheory/Depth/Rees.lean,Mathlib/RingTheory/Filtration.lean,Mathlib/RingTheory/Flat/LocallyFree.lean,Mathlib/RingTheory/GlobalDimension.lean,Mathlib/RingTheory/Ideal/Height.lean,Mathlib/RingTheory/Ideal/KrullsHeightTheorem.lean,Mathlib/RingTheory/Ideal/Maps.lean,Mathlib/RingTheory/Ideal/Maximal.lean,Mathlib/RingTheory/Ideal/Operations.lean,Mathlib/RingTheory/Ideal/UFD.lean,Mathlib/RingTheory/KrullDimension/PID.lean,Mathlib/RingTheory/LocalProperties/FinitePresentation.lean,Mathlib/RingTheory/LocalProperties/Invertible.lean,Mathlib/RingTheory/Localization/Away/Basic.lean,Mathlib/RingTheory/Localization/BaseChange.lean,Mathlib/RingTheory/Localization/Finiteness.lean,Mathlib/RingTheory/Regular/Free.lean,Mathlib/RingTheory/Regular/LinearMap.lean,Mathlib/RingTheory/RegularLocalRing/AuslanderBuchsbaumSerre.lean,Mathlib/RingTheory/RegularLocalRing/Basic.lean,Mathlib/RingTheory/RegularLocalRing/GlobalDimension.lean,Mathlib/RingTheory/RegularLocalRing/Localization.lean,Mathlib/RingTheory/RegularLocalRing/UFD.lean,Mathlib/RingTheory/Spectrum/Prime/FreeLocus.lean,Mathlib/RingTheory/Support.lean,Mathlib/RingTheory/UniqueFactorizationDomain/Localization.lean,docs/references.bib 49 3 ['github-actions', 'mathlib-bors', 'mathlib-dependent-issues'] nobody
4-25126
4 days ago
5-31778
5 days ago
0-21
21 seconds
39370 fpvandoorn
author:fpvandoorn
 feat: add specialized grind sets This adds two grind attributes for specialized tactics. See module doc for more information and motivation. This PR does not tag any lemmas yet. [Zulip thread](https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/small.20specialized.20grind.20sets/with/595132109) --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-meta 113/0 Mathlib.lean,Mathlib/Tactic.lean,Mathlib/Tactic/Common.lean,Mathlib/Tactic/GrindAttrs.lean 4 5 ['chenson2018', 'fpvandoorn', 'github-actions'] dwrensha
assignee:dwrensha
4-24480
4 days ago
8-23156
8 days ago
8-22867
8 days
39491 Yu-Misaka
author:Yu-Misaka
 feat(Mathlib/LinearAlgebra/RootSystem/CartanMatrix): a Cartan matrix of a reduced crystallographic root system cannot have eigenvalue 4 This proves the TODO that a Cartan matrix of a reduced crystallographic root system cannot have eigenvalue 4. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor t-algebra
label:t-algebra$
 125/8 Mathlib/Data/Matrix/Mul.lean,Mathlib/LinearAlgebra/RootSystem/CartanMatrix.lean,Mathlib/LinearAlgebra/RootSystem/GeckConstruction/Basis.lean,Mathlib/LinearAlgebra/RootSystem/GeckConstruction/Semisimple.lean 4 5 ['copilot-pull-request-reviewer', 'github-actions', 'mathlib-bors', 'ocfnash'] ocfnash
assignee:ocfnash
4-22296
4 days ago
5-69200
5 days ago
0-10
10 seconds
39216 emlis42
author:emlis42
 feat(Topology/Algebra/InfiniteSum): add `limUnder_eq_tprod` This PR adds `limUnder_eq_tprod` and `limUnder_eq_tsum`. t-topology new-contributor 10/0 Mathlib/Topology/Algebra/InfiniteSum/Defs.lean 1 6 ['SnirBroshi', 'emlis42', 'github-actions', 'grunweg', 'mathlib-bors'] urkud
assignee:urkud
4-21987
4 days ago
4-21989
4 days ago
6-79087
6 days
32555 ksenono
author:ksenono
 feat(Combinatorics/SimpleGraph/Matching): maximum and maximal matchings for Konig's theorem --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-combinatorics new-contributor awaiting-author 112/0 Mathlib/Combinatorics/SimpleGraph/DegreeSum.lean,Mathlib/Combinatorics/SimpleGraph/Matching.lean 2 46 ['SnirBroshi', 'SproutSeeds', 'YaelDillies', 'b-mehta', 'github-actions', 'jcommelin', 'ksenono'] YaelDillies
assignee:YaelDillies
4-21426
4 days ago
4-35585
4 days ago
130-57925
130 days
39412 mbkybky
author:mbkybky
 feat(RingTheory/Flat): a finite flat `R`-module `M` is locally free if `rankAtStalk M` is constant Let `M` be a finite flat `R`-module, `p` be a prime ideal of `R`. We show that if `rankAtStalk M` is constant, then there exists `a ∉ p` such that the `M` is free after localization away from `a`. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-ring-theory 137/2 Mathlib.lean,Mathlib/Algebra/Module/FinitePresentation.lean,Mathlib/Algebra/Module/LocalizedModule/Submodule.lean,Mathlib/LinearAlgebra/FiniteDimensional/Basic.lean,Mathlib/RingTheory/Flat/LocallyFree.lean,Mathlib/RingTheory/Localization/BaseChange.lean,Mathlib/RingTheory/Spectrum/Prime/FreeLocus.lean,Mathlib/RingTheory/Support.lean 8 4 ['github-actions', 'robin-carlier'] nobody
4-20036
4 days ago
4-20036
4 days ago
7-24731
7 days
39269 godofecht
author:godofecht
 feat(Algebra/Spectrum): add the second resolvent identity Adds `spectrum.resolvent_sub_resolvent`: For `a b : A` in an `R`-algebra and `r` in the resolvent set of both, `resolvent a r - resolvent b r = resolvent a r * (a - b) * resolvent b r`. Companion to `spectrum.resolvent_eq`. t-algebra new-contributor
label:t-algebra$
 15/0 Mathlib/Algebra/Algebra/Spectrum/Basic.lean 1 3 ['github-actions', 'wwylele'] nobody
4-19978
4 days ago
10-8143
10 days ago
10-7854
10 days
39329 lecopivo
author:lecopivo
 feat(fun_prop): eager application of transition theorems for fun_prop For properties like Integrable we want to apply transition theorems(like Continuous -> Integrable) eagerly --- This is a change necessary in preparation for making `fun_prop` work for integrability. --> [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-meta merge-conflict 93/30 Mathlib/Tactic/FunProp/Attr.lean,Mathlib/Tactic/FunProp/Core.lean,Mathlib/Tactic/FunProp/Decl.lean,MathlibTest/FunPropMinimal.lean 4 14 ['b-mehta', 'github-actions', 'lecopivo', 'mathlib-merge-conflicts'] JovanGerb
assignee:JovanGerb
4-19625
4 days ago
6-33573
6 days ago
1-47071
1 day
38709 tb65536
author:tb65536
 feat(Algebra/Polynomial/Roots): roots of `p(-X)` This PR proves that the roots of `p(-X)` are just the negatives of the roots of `p`. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-ring-theory t-algebra
label:t-algebra$
 36/0 Mathlib/Algebra/Polynomial/RingDivision.lean,Mathlib/Algebra/Polynomial/Roots.lean 2 3 ['github-actions', 'robin-carlier', 'tb65536'] alreadydone
assignee:alreadydone
4-16064
4 days ago
4-16071
4 days ago
22-85812
22 days
39271 tb65536
author:tb65536
 feat(RingTheory/Ideal/MinimalPrime/Localization): criterion for `R ⧸ I` to have dimension zero This PR proves that a quotient `R ⧸ I` has dimension at most zero iff all minimal primes over `I` are maximal. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-ring-theory t-algebra
label:t-algebra$
 20/0 Mathlib/RingTheory/KrullDimension/Basic.lean,Mathlib/RingTheory/KrullDimension/Zero.lean 2 3 ['github-actions', 'robin-carlier', 'tb65536'] nobody
4-15508
4 days ago
4-15562
4 days ago
9-83544
9 days
39366 akiezun
author:akiezun
 feat(Data/Nat): add prime divisibility for ascFactorial and choose Adds two prime-divisibility lemmas for natural-number factorial/binomial APIs. The first characterizes when a prime divides an ascending factorial: `Nat.Prime.dvd_ascFactorial_iff`. The second applies this to binomial coefficients: `Nat.Prime.dvd_choose_add_sub_one_iff`, using `Nat.ascFactorial_eq_factorial_mul_choose'` and cancellation of the `n!` factor when `n < p`. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-data new-contributor large-import 46/0 Mathlib.lean,Mathlib/Data/Nat/Choose/Consecutive.lean,Mathlib/Data/Nat/Factorial/BigOperators.lean 3 9 ['SnirBroshi', 'akiezun', 'github-actions', 'wwylele'] nobody
4-12525
4 days ago
4-14566
4 days ago
8-24656
8 days
31613 xyzw12345
author:xyzw12345
 feat(RepresentationTheory/GroupCohomology): Non-abelian Group Cohomology In this PR, we develop the theory of non-abelian group cohomology, following the section in GTM 67 - Local Fields by Jean-Pierre Serre. We defined H0 and H1, constructed the connection maps, proved the long exact sequence, and constructed natural isomorphisms between our H0, H1 and the existing `groupCohomology` API. Co-authored by: Jiedong Jiang @jjdishere --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra awaiting-author merge-conflict
label:t-algebra$
 610/1 Mathlib.lean,Mathlib/GroupTheory/Subgroup/Center.lean,Mathlib/RepresentationTheory/Homological/GroupCohomology/NonAbelian.lean 3 11 ['eric-wieser', 'github-actions', 'kbuzzard', 'mathlib-merge-conflicts', 'mathlib4-merge-conflict-bot', 'tb65536', 'xyzw12345'] eric-wieser
assignee:eric-wieser
4-11549
4 days ago
94-24371
94 days ago
35-32011
35 days
39543 jvanwinden
author:jvanwinden
 feat(MeasureTheory/Measure/Tight): portmanteau condition for compact sets One part of the portmanteau theorem states that a limsup condition for closed sets implies weak convergence of probability measures. In the situation where the measures are tight however, one only needs to check the limsup condition for compact sets. This PR thus introduces `tendsto_of_forall_isCompact_of_isTightMeasureSet`, which is a version of [tendsto_of_forall_isClosed_limsup_le](https://leanprover-community.github.io/mathlib4_docs/Mathlib/MeasureTheory/Measure/Portmanteau.html#MeasureTheory.tendsto_of_forall_isClosed_limsup_le) but replaces `IsClosed` with `IsCompact`, under the additional hypothesis that the measures are tight. I would have liked to put this lemma in MeasureTheory/Portmeanteau, but this created an import cycle. I am open to suggestions for where it could otherwise be moved. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-measure-probability 27/0 Mathlib/MeasureTheory/Measure/Tight.lean 1 1 ['github-actions'] nobody
4-9689
4 days ago
4-9764
4 days ago
4-9475
4 days
37584 kennethgoodman
author:kennethgoodman
 feat(Data/Nat/Fib): formalize Lamé's theorem ## Summary Formalize [Lamé's theorem](https://en.wikipedia.org/wiki/Lam%C3%A9%27s_theorem) (1844), the founding result of computational complexity theory. **Lamé's Theorem:** If the Euclidean algorithm on inputs `(a, b)` with `b ≤ a` takes `n + 1` division steps, then `b ≥ fib(n + 1)` and `a ≥ fib(n + 2)`. ### New definitions - `Nat.euclidSteps`: counts the number of division steps in the Euclidean algorithm on natural number inputs. ### New theorems - `Nat.fib_le_of_euclidSteps`: the main Lamé bound — Fibonacci lower bound on inputs given a step count. - `Nat.euclidSteps_le_of_lt_fib`: the contrapositive — step count upper bound given a Fibonacci bound on the smaller input. - `Nat.add_mod_le`: helper lemma that `b + a % b ≤ a` when `b ≤ a` and `0 < b`. ### Proof strategy Induction on `n`, tracking both elements of the pair. The key insight is that each Euclidean step replaces `(a, b)` with `(b, a % b)`, and since `a ≥ b + a % b` (because `a / b ≥ 1`), the Fibonacci recurrence `fib(n+3) = fib(n+2) + fib(n+1)` matches the structure of the algorithm. ### References - Gabriel Lamé, *Note sur la limite du nombre des divisions dans la recherche du plus grand commun diviseur entre deux nombres entiers*, Comptes rendus de l'Académie des sciences, 1844. --- ### AI usage disclosure Per the [Mathlib AI guidelines](https://leanprover-community.github.io/contribute/index.html#use-of-ai): Claude Code (Claude Opus 4.6) was used to assist with writing the Lean 4 proof code, fixing tactic errors, and drafting this PR description. The mathematical proof (induction on step count, tracking both pair elements through the Fibonacci recurrence) was designed by hand and verified on paper before formalization. I have reviewed and understand every line of the resulting Lean code and can explain all proof steps. --- - [x] builds cleanly (`lake build Mathlib.Data.Nat.Fib.Lame`) - [x] no `sorry` - [x] lines ≤ 100 characters, no trailing whitespace - [x] `autoImplicit false` - [x] docstrings on all public declarations new-contributor LLM-generated t-data merge-conflict 121/0 Mathlib.lean,Mathlib/Data/Nat/Basic.lean,Mathlib/Data/Nat/Fib/Basic.lean,Mathlib/Data/Nat/Fib/Lame.lean,docs/1000.yaml 5 25 ['euprunin', 'github-actions', 'kennethgoodman', 'mathlib-merge-conflicts', 'vihdzp', 'wwylele'] TwoFX
assignee:TwoFX
4-8298
4 days ago
4-8299
4 days ago
44-66371
44 days
38415 yuanyi-350
author:yuanyi-350
 chore: kill 100 `erw`s Still open - [ ] depends on: #38725 - [ ] depends on: #38762 - [ ] depends on: #38764 - [ ] depends on: #38766 - [ ] depends on: #38916 - [ ] depends on: #38917 - [ ] depends on: #38918 - [ ] depends on: #38922 Fixed - [ ] depends on: #38418 - [ ] depends on: #38417 - [ ] depends on: #38501 - [ ] depends on: #38502 - [ ] depends on: #38503 - [ ] depends on: #38504 - [ ] depends on: #38505 - [ ] depends on: #38506 - [ ] depends on: #38508 - [ ] depends on: #38514 - [ ] depends on: #38515 - [ ] depends on: #38516 - [ ] depends on: #38517 - [ ] depends on: #38518 - [ ] depends on: #38519 - [ ] depends on: #38520 - [ ] depends on: #38521 - [ ] depends on: #38522 - [ ] depends on: #38644 - [ ] depends on: #38645 - [ ] depends on: #38675 - [ ] depends on: #38676 - [ ] depends on: #38677 - [ ] depends on: #38678 - [ ] depends on: #38679 - [ ] depends on: #38680 - [ ] depends on: #38681 - [ ] depends on: #38682 - [ ] depends on: #38683 - [ ] depends on: #38684 - [ ] depends on: #38685 - [ ] depends on: #38686 - [ ] depends on: #38687 - [ ] depends on: #38688 - [ ] depends on: #38689 - [ ] depends on: #38690 - [ ] depends on: #38724 - [ ] depends on: #38726 - [ ] depends on: #38727 - [ ] depends on: #38728 - [ ] depends on: #38734 - [ ] depends on: #38735 - [ ] depends on: #38736 - [ ] depends on: #38737 - [ ] depends on: #38738 - [ ] depends on: #38761 - [ ] depends on: #38763 - [ ] depends on: #38765 - [ ] depends on: #38767 - [ ] depends on: #38768 - [ ] depends on: #38769 - [ ] depends on: #38770 - [ ] depends on: #38771 - [ ] depends on: #38772 - [ ] depends on: #38773 - [ ] depends on: #38774 - [ ] depends on: #38912 - [ ] depends on: #38913 - [ ] depends on: #38914 - [ ] depends on: #38915 - [ ] depends on: #38919 - [ ] depends on: #38920 - [ ] depends on: #38921 - [ ] depends on: #38923 - [ ] depends on: #38924 - [ ] depends on: #38925 --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) blocked-by-other-PR merge-conflict 60/58 Mathlib/Algebra/Category/Grp/LeftExactFunctor.lean,Mathlib/Algebra/Category/ModuleCat/Presheaf/Sheafification.lean,Mathlib/AlgebraicGeometry/EllipticCurve/Projective/Point.lean,Mathlib/AlgebraicGeometry/Modules/Tilde.lean,Mathlib/AlgebraicGeometry/ProjectiveSpectrum/Proper.lean,Mathlib/AlgebraicTopology/DoldKan/GammaCompN.lean,Mathlib/CategoryTheory/CatCommSq.lean,Mathlib/CategoryTheory/Comma/Basic.lean,Mathlib/CategoryTheory/Groupoid/FreeGroupoid.lean,Mathlib/CategoryTheory/Preadditive/Mat.lean,Mathlib/CategoryTheory/Triangulated/Pretriangulated.lean,Mathlib/LinearAlgebra/CliffordAlgebra/EvenEquiv.lean,Mathlib/RingTheory/Valuation/ValuativeRel/Basic.lean,Mathlib/Topology/Algebra/Valued/ValuedField.lean 14 13 ['Whysoserioushah', 'github-actions', 'leanprover-radar', 'loefflerd', 'mathlib-dependent-issues', 'mathlib-merge-conflicts', 'yuanyi-350'] nobody
4-6169
4 days ago
27-52549
27 days ago
1-1966
1 day
39549 Hagb
author:Hagb
 feat(Order/RelIso/Basic): `swap`s and `compl`s are `Equiv`s --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-order 13/8 Mathlib/Order/RelIso/Basic.lean 1 3 ['Hagb', 'github-actions', 'leanprover-radar'] nobody
4-4861
4 days ago
4-7302
4 days ago
4-7013
4 days
39508 mcdoll
author:mcdoll
 chore(Algebra/Module): rename multiplication lemmas and add `push/pull_end` attributes The renaming makes this file consistent with `Equiv.Perm`, where the custom `simp` set was first used. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra awaiting-CI merge-conflict
label:t-algebra$
 59/50 Mathlib/Algebra/Algebra/Bilinear.lean,Mathlib/Algebra/Central/End.lean,Mathlib/Algebra/Lie/Derivation/Basic.lean,Mathlib/Algebra/Lie/Engel.lean,Mathlib/Algebra/Lie/OfAssociative.lean,Mathlib/Algebra/Lie/TraceForm.lean,Mathlib/Algebra/Lie/Weights/Basic.lean,Mathlib/Algebra/Lie/Weights/Killing.lean,Mathlib/Algebra/Module/LinearMap/End.lean,Mathlib/Algebra/Module/Submodule/Ker.lean,Mathlib/Algebra/Star/LinearMap.lean,Mathlib/Analysis/InnerProductSpace/Adjoint.lean,Mathlib/Analysis/InnerProductSpace/Symmetric.lean,Mathlib/Data/Matrix/Bilinear.lean,Mathlib/LinearAlgebra/Charpoly/Basic.lean,Mathlib/LinearAlgebra/Eigenspace/Basic.lean,Mathlib/LinearAlgebra/FiniteDimensional/Basic.lean,Mathlib/LinearAlgebra/Matrix/ToLin.lean,Mathlib/LinearAlgebra/Projection.lean,Mathlib/LinearAlgebra/Projectivization/Action.lean,Mathlib/LinearAlgebra/Reflection.lean,Mathlib/LinearAlgebra/RootSystem/Hom.lean,Mathlib/LinearAlgebra/Trace.lean,Mathlib/RepresentationTheory/Basic.lean,Mathlib/RepresentationTheory/Homological/GroupHomology/FiniteCyclic.lean,Mathlib/RingTheory/Artinian/Module.lean,Mathlib/RingTheory/TensorProduct/Maps.lean,Mathlib/Topology/Algebra/Module/LinearMap.lean 28 2 ['github-actions', 'mathlib-merge-conflicts'] nobody
4-3978
4 days ago
4-61988
4 days ago
0-2572
42 minutes
39541 b-mehta
author:b-mehta
 feat(Data/Finset/Powerset): add results about powersetCard These are useful for set family combinatorics --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-data 20/0 Mathlib/Data/Finset/Powerset.lean 1 1 ['github-actions'] nobody
4-222
4 days ago
4-295
4 days ago
4-2353
4 days
39555 b-mehta
author:b-mehta
 feat(Data/Finset/Image): relate images with nontriviality --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-data 20/0 Mathlib/Data/Finset/Image.lean 1 1 ['github-actions'] nobody
3-84801
3 days ago
3-84879
3 days ago
3-84590
3 days
38220 wwylele
author:wwylele
 feat(LinearAlgebra/AffineSpace): shifting a subspace towards a point Split off from #36018 and excluded the Simplex part. This is preparing to calculate the volume of a simplex by integrating the cross-section created by shifting the base plane. Part of https://github.com/leanprover-community/mathlib4/pull/34826. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra
label:t-algebra$
 133/0 Mathlib.lean,Mathlib/LinearAlgebra/AffineSpace/AffineSubspace/Shift.lean 2 7 ['alreadydone', 'copilot-pull-request-reviewer', 'github-actions', 'themathqueen', 'wwylele'] alreadydone
assignee:alreadydone
3-81843
3 days ago
12-27774
12 days ago
34-2399
34 days
35017 robo7179
author:robo7179
 feat(Combinatorics/SimpleGraph/Acyclic): every nontrivial tree has at least two leaves Add two theorems to prove that every non trivial tree has at least two leaves (one in Finite the other in Acyclic). --- - [ ] depends on: #37399 - [ ] depends on: #37400 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-combinatorics new-contributor awaiting-author blocked-by-other-PR 24/0 Mathlib/Combinatorics/SimpleGraph/Acyclic.lean,Mathlib/Combinatorics/SimpleGraph/Finite.lean 2 44 ['IvanRenison', 'SnirBroshi', 'YaelDillies', 'github-actions', 'mathlib-dependent-issues', 'mathlib-merge-conflicts', 'robo7179'] YaelDillies
assignee:YaelDillies
3-80388
3 days ago
66-19330
66 days ago
35-3753
35 days
38144 yuanyi-350
author:yuanyi-350
 refactor(NumberTheory): Golf 100 files This PR is an experimental project. In this PR, we use an Agent to automatically scan and attempt to simplify proofs. We hope to eventually effectively golf 100 files and avoid reinventing the wheel in mathlib. We have chosen `Mathlib/NumberTheory` as the testing ground. If this experiment is very successful and accepted by the mathlib community, we would be honored to open source it. The relevant projects includes - [ ] #38104, which golfs `Mathlib/MeasureTheory`. - [ ] #37968, which golfs `Mathlib/Analysis`. This PR serves as an index. For the actual code review, please refer to the individual PRs linked below. Each of those PRs modifies only a single file to facilitate the review process. - [ ] depends on: #38204 - [ ] depends on: #38277 - [ ] depends on: #38278 - [ ] depends on: #38279 - [ ] depends on: #38280 - [ ] depends on: #38351 - [ ] depends on: #38402 - [ ] depends on: #38403 - [ ] depends on: #38454 - [ ] depends on: #38457 - [ ] depends on: #38494 - [ ] depends on: #38495 - [ ] depends on: #38832 - [ ] depends on: #38833 - [ ] depends on: #38834 - [ ] depends on: #38835 - [ ] depends on: #38836 - [ ] depends on: #38838 - [ ] depends on: #38839 - [ ] depends on: #39372 - [ ] depends on: #39373 - [ ] depends on: #39374 - [ ] depends on: #39375 - [ ] depends on: #39376 - [ ] depends on: #39377 - [ ] depends on: #39378 - [ ] depends on: #39379 --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-number-theory large-import codex LLM-generated blocked-by-other-PR 67/181 Mathlib/NumberTheory/ArithmeticFunction/Defs.lean,Mathlib/NumberTheory/DiophantineApproximation/Basic.lean,Mathlib/NumberTheory/Divisors.lean,Mathlib/NumberTheory/EulerProduct/Basic.lean,Mathlib/NumberTheory/FLT/Four.lean,Mathlib/NumberTheory/FLT/Polynomial.lean,Mathlib/NumberTheory/GaussSum.lean,Mathlib/NumberTheory/ModularForms/CongruenceSubgroups.lean,Mathlib/NumberTheory/ModularForms/Derivative.lean,Mathlib/NumberTheory/ModularForms/EisensteinSeries/MDifferentiable.lean,Mathlib/NumberTheory/ModularForms/SlashActions.lean,Mathlib/NumberTheory/NumberField/CanonicalEmbedding/Basic.lean,Mathlib/NumberTheory/PrimeCounting.lean,Mathlib/NumberTheory/RamificationInertia/Basic.lean,Mathlib/NumberTheory/SmoothNumbers.lean 15 11 ['github-actions', 'mathlib-dependent-issues', 'mathlib-merge-conflicts', 'tb65536', 'yuanyi-350'] MichaelStollBayreuth
assignee:MichaelStollBayreuth
3-79846
3 days ago
8-21704
8 days ago
3-39923
3 days
39098 BoltonBailey
author:BoltonBailey
 chore(Data/Vector): add `grind` to cons lemmas This PR affects `List.Vector.head_cons` and `List.Vector.tail_cons`. It moves the simp attribute assignment of these lemmas to the lemma declarations and also applies the `grind =` attribute. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-data 2/2 Mathlib/Data/Vector/Basic.lean,Mathlib/Data/Vector/Defs.lean 2 4 ['BoltonBailey', 'github-actions', 'leanprover-radar'] nobody
3-77923
3 days ago
3-77997
3 days ago
13-4938
13 days
38840 peabrainiac
author:peabrainiac
 feat(Topology): continuous germs of maps Add a predicate `Filter.Germ.Continuous` for continuity of germs between topological spaces, and bundled types `ContinuousGerm x Y` / `PointedContinuousGerm x y` of continuous germs at `x` resp. continuous germs at `x` taking `x` to `y`. --- See also #10977, which tried to introduce smooth germs between manifolds a while ago, though with a focus on pointwise algebraic operations instead of composability. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-topology 171/1 Mathlib.lean,Mathlib/Topology/ContinuousGerm.lean,Mathlib/Topology/ContinuousOn.lean,Mathlib/Topology/Germ.lean 4 6 ['chrisflav', 'github-actions', 'j-loreaux', 'mathlib-merge-conflicts', 'peabrainiac'] ADedecker
assignee:ADedecker
3-77383
3 days ago
3-77418
3 days ago
16-25495
16 days
31587 JovanGerb
author:JovanGerb
 Lean pr testing 11156 Testing the performance improvement given by not deleting cache so often when modifying the environment. cf. https://github.com/leanprover/lean4/pull/11156 --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict WIP 5932/1306 .github/workflows/build_template.yml,Archive/Examples/IfNormalization/Result.lean,Archive/Imo/Imo1988Q6.lean,Archive/Imo/Imo2024Q6.lean,Cache/IO.lean,Counterexamples/Phillips.lean,Mathlib.lean,Mathlib/Algebra/Algebra/NonUnitalHom.lean,Mathlib/Algebra/Algebra/Unitization.lean,Mathlib/Algebra/BigOperators/Group/Finset/Basic.lean,Mathlib/Algebra/BigOperators/Group/List/Basic.lean,Mathlib/Algebra/Category/AlgCat/Basic.lean,Mathlib/Algebra/Category/AlgCat/Limits.lean,Mathlib/Algebra/Category/CoalgCat/ComonEquivalence.lean,Mathlib/Algebra/Category/ContinuousCohomology/Basic.lean,Mathlib/Algebra/Category/Grp/AB.lean,Mathlib/Algebra/Category/Grp/Adjunctions.lean,Mathlib/Algebra/Category/Grp/Biproducts.lean,Mathlib/Algebra/Category/Grp/Colimits.lean,Mathlib/Algebra/Category/Grp/LargeColimits.lean,Mathlib/Algebra/Category/Grp/LeftExactFunctor.lean,Mathlib/Algebra/Category/Grp/Yoneda.lean,Mathlib/Algebra/Category/ModuleCat/Adjunctions.lean,Mathlib/Algebra/Category/ModuleCat/Biproducts.lean,Mathlib/Algebra/Category/ModuleCat/ChangeOfRings.lean,Mathlib/Algebra/Category/ModuleCat/Colimits.lean,Mathlib/Algebra/Category/ModuleCat/Differentials/Presheaf.lean,Mathlib/Algebra/Category/ModuleCat/ExteriorPower.lean,Mathlib/Algebra/Category/ModuleCat/FilteredColimits.lean,Mathlib/Algebra/Category/ModuleCat/Kernels.lean,Mathlib/Algebra/Category/ModuleCat/LeftResolution.lean,Mathlib/Algebra/Category/ModuleCat/Limits.lean,Mathlib/Algebra/Category/ModuleCat/Monoidal/Adjunction.lean,Mathlib/Algebra/Category/ModuleCat/Presheaf.lean,Mathlib/Algebra/Category/ModuleCat/Presheaf/ColimitFunctor.lean,Mathlib/Algebra/Category/ModuleCat/Presheaf/Colimits.lean,Mathlib/Algebra/Category/ModuleCat/Presheaf/Free.lean,Mathlib/Algebra/Category/ModuleCat/Presheaf/Generator.lean,Mathlib/Algebra/Category/ModuleCat/Presheaf/Limits.lean,Mathlib/Algebra/Category/ModuleCat/Presheaf/Monoidal.lean,Mathlib/Algebra/Category/ModuleCat/Presheaf/Pushforward.lean,Mathlib/Algebra/Category/ModuleCat/Presheaf/Sheafification.lean,Mathlib/Algebra/Category/ModuleCat/Presheaf/Sheafify.lean,Mathlib/Algebra/Category/ModuleCat/Sheaf/PullbackContinuous.lean,Mathlib/Algebra/Category/ModuleCat/Sheaf/PullbackFree.lean,Mathlib/Algebra/Category/ModuleCat/Sheaf/PushforwardContinuous.lean,Mathlib/Algebra/Category/ModuleCat/Sheaf/Quasicoherent.lean,Mathlib/Algebra/Category/ModuleCat/Stalk.lean,Mathlib/Algebra/Category/ModuleCat/Topology/Basic.lean,Mathlib/Algebra/Category/ModuleCat/Topology/Homology.lean,Mathlib/Algebra/Category/ModuleCat/Ulift.lean,Mathlib/Algebra/Category/MonCat/Adjunctions.lean,Mathlib/Algebra/Category/MonCat/Colimits.lean,Mathlib/Algebra/Category/MonCat/FilteredColimits.lean,Mathlib/Algebra/Category/MonCat/Limits.lean,Mathlib/Algebra/Category/MonCat/Yoneda.lean,Mathlib/Algebra/Category/Ring/Adjunctions.lean,Mathlib/Algebra/Category/Ring/Colimits.lean,Mathlib/Algebra/Category/Ring/Constructions.lean,Mathlib/Algebra/Category/Ring/FinitePresentation.lean,Mathlib/Algebra/Category/Ring/Limits.lean,Mathlib/Algebra/Category/Ring/Under/Basic.lean,Mathlib/Algebra/Category/Ring/Under/Limits.lean,Mathlib/Algebra/CharP/Two.lean,Mathlib/Algebra/Colimit/DirectLimit.lean,Mathlib/Algebra/DirectSum/Algebra.lean,Mathlib/Algebra/DirectSum/Ring.lean,Mathlib/Algebra/DualNumber.lean,Mathlib/Algebra/Group/Defs.lean,Mathlib/Algebra/Group/Equiv/Basic.lean,Mathlib/Algebra/Group/Ext.lean,Mathlib/Algebra/Group/Nat/Even.lean,Mathlib/Algebra/Group/Submonoid/BigOperators.lean,Mathlib/Algebra/GroupWithZero/Action/Faithful.lean,Mathlib/Algebra/Homology/Additive.lean,Mathlib/Algebra/Homology/AlternatingConst.lean,Mathlib/Algebra/Homology/Augment.lean,Mathlib/Algebra/Homology/Bifunctor.lean,Mathlib/Algebra/Homology/BifunctorAssociator.lean,Mathlib/Algebra/Homology/BifunctorHomotopy.lean,Mathlib/Algebra/Homology/BifunctorShift.lean,Mathlib/Algebra/Homology/CochainComplexOpposite.lean,Mathlib/Algebra/Homology/CochainComplexPlus.lean,Mathlib/Algebra/Homology/CommSq.lean,Mathlib/Algebra/Homology/ComplexShape.lean,Mathlib/Algebra/Homology/ComplexShapeSigns.lean,Mathlib/Algebra/Homology/DerivedCategory/Basic.lean,Mathlib/Algebra/Homology/DerivedCategory/ExactFunctor.lean,Mathlib/Algebra/Homology/DerivedCategory/Ext/Basic.lean,Mathlib/Algebra/Homology/DerivedCategory/Ext/EnoughInjectives.lean,Mathlib/Algebra/Homology/DerivedCategory/Ext/EnoughProjectives.lean,Mathlib/Algebra/Homology/DerivedCategory/Ext/ExactSequences.lean,Mathlib/Algebra/Homology/DerivedCategory/Ext/ExtClass.lean,Mathlib/Algebra/Homology/DerivedCategory/Ext/Map.lean,Mathlib/Algebra/Homology/DerivedCategory/HomologySequence.lean,Mathlib/Algebra/Homology/DerivedCategory/KInjective.lean,Mathlib/Algebra/Homology/DerivedCategory/KProjective.lean,Mathlib/Algebra/Homology/DerivedCategory/ShortExact.lean,Mathlib/Algebra/Homology/DerivedCategory/SingleTriangle.lean,Mathlib/Algebra/Homology/DerivedCategory/TStructure.lean 1425 5 ['JovanGerb', 'github-actions', 'leanprover-bot', 'mathlib4-merge-conflict-bot'] nobody
3-75911
3 days ago
190-23499
190 days ago
0-13411
3 hours
29744 espottesmith
author:espottesmith
 feat(Combinatorics): define directed hypergraphs This PR defines directed hypergraphs: ``` @[ext] structure DiHypergraph (α : Type*) where /-- The vertex set -/ vertexSet : Set α /-- The edge set -/ edgeSet : Set ((Set α) × (Set α)) /-- Each edge is a pair (s, d), where s ⊆ vertexSet and d ⊆ vertexSet -/ edge_src_dst_isSubset_vertexSet' : ∀ ⦃e⦄, e ∈ edgeSet → e.1 ⊆ vertexSet ∧ e.2 ⊆ vertexSet ``` Additional definitions: - tail/head stars and negative/positive stars - some special cases (B-Graph, F-Graph, BF-Graph, and what I'm calling a "non-endless" dihypergraph, where neither the source/tail nor the destination/head are empty) - Vertex and (hyper)edge adjacency - isolated vertices - empty and nonempty dihypergraphs The design employed here is based off of #28613, but this PR does not depend on that one. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-combinatorics new-contributor 398/0 Mathlib.lean,Mathlib/Combinatorics/DiHypergraph/Basic.lean 2 4 ['b-mehta', 'espottesmith', 'github-actions', 'mathlib4-merge-conflict-bot'] nobody
3-75788
3 days ago
49-45173
49 days ago
107-28351
107 days
33928 jsm28
author:jsm28
 feat(Combinatorics/Tiling/TileSet): indexed families of tiles Define the type `TileSet` for indexed families of tiles (in a discrete context), and some associated definitions (including `symmetryGroup`) and API lemmas. `TileSet` can be used for tilings of the whole space; for tilings of part of the space; for patches of tiles (extracted from a tiling by considering tiles meeting some set of points, or considered on their own without extracting from a tiling); for multiple tilings (covering the space more than once). In particular, the fact that people study multiple tilings provides a clear justification for using indexed families rather than sets of tiles, and basic definitions and API lemmas generally work for all these different uses of `TileSet` (sometimes with weak constraints such as tiles being finite, nonempty and only having finitely many tiles meeting any point of the space). Definitions for saying e.g. "this `TileSet` is a tiling of the whole space" are to be included in subsequent files in subsequent PRs. From AperiodicMonotilesLean. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-combinatorics 460/0 Mathlib.lean,Mathlib/Combinatorics/Tiling/TileSet.lean 2 23 ['Parcly-Taxel', 'b-mehta', 'eric-wieser', 'github-actions', 'jsm28', 'vihdzp'] nobody
3-75787
3 days ago
129-6495
129 days ago
129-6206
129 days
36274 JTylM
author:JTylM
 feat(Combinatorics/SimpleGraph/Matching): implemented the matchingNumber of a graph --- - [ ] depends on: #36406 - [ ] depends on: #32555 I implemented the matchingNumber as described in the issue and proved some statements including showing that there exists a matching achieving the matchingNumber. matchingNumber is increasing under injective maps matchingNumber is equal under isomorphisms matchingNumber of a matching is the cardinality of the matching This is my first PR and i had some trouble with some of the proofs, especially with the proof for matchingNumber.isAttained. So any suggestions on how to make the proofs shorter would be welcome. Also i was not sure about the naming of some of the theorems so i would apprechiate feedback here as well. new-contributor t-combinatorics blocked-by-other-PR merge-conflict 292/2 Mathlib/Combinatorics/SimpleGraph/Matching.lean 1 40 ['JTylM', 'SnirBroshi', 'SproutSeeds', 'github-actions', 'mathlib-dependent-issues', 'mathlib-merge-conflicts', 'vlad902'] nobody
3-74548
3 days ago
64-28215
64 days ago
9-69432
9 days
31222 Thmoas-Guan
author:Thmoas-Guan
 feat(Algebra): `Hom` commute with flat base change In this PR, we proved `Hom_S (M \tensor S, N \tensor S)` is base change of `Hom_R (M, N)` with respect to `LinearMap.baseChangeHom`. Co-authored-by: Wang Jingting --- - [x] depends on: #31218 - [x] depends on: #31219 - [x] depends on: #31696 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) large-import t-algebra
label:t-algebra$
 49/0 Mathlib/Algebra/Module/FinitePresentation.lean 1 5 ['github-actions', 'mathlib-dependent-issues', 'mathlib4-merge-conflict-bot'] kim-em
assignee:kim-em
3-74324
3 days ago
21-84347
21 days ago
21-84324
21 days
37443 SnirBroshi
author:SnirBroshi
 feat(Combinatorics/SimpleGraph/Walk/Operations): permutations of support --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-combinatorics maintainer-merge 17/0 Mathlib/Combinatorics/SimpleGraph/Paths.lean,Mathlib/Combinatorics/SimpleGraph/Walk/Operations.lean 2 6 ['YaelDillies', 'github-actions', 'mathlib-merge-conflicts'] b-mehta
assignee:b-mehta
3-74322
3 days ago
11-47180
11 days ago
51-32167
51 days
38826 tb65536
author:tb65536
 feat(RingTheory/LocalRing/ResidueField/Fiber): `IsLiesOverAlgebra` instance We use the new `IsLiesOverAlgebra` predicate from #38465 to express the fact that the existing `R_p`-algebra instance on `(p.Fiber S)_q` agrees with the one coming from the fact that `q` lies over `p`. (The point of this predicate is to avoid exactly this sort of diamond). --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-ring-theory t-algebra
label:t-algebra$
 7/1 Mathlib/RingTheory/LocalRing/ResidueField/Fiber.lean 1 3 ['github-actions', 'robin-carlier', 'tb65536'] riccardobrasca
assignee:riccardobrasca
3-74319
3 days ago
11-19070
11 days ago
20-83259
20 days
39006 tb65536
author:tb65536
 feat(Algebra/Field/Subfield/Basic): add definition of finitely generated fields This PR adds a definition of finitely generated fields with API relating this definition to the existing definitions. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-ring-theory t-algebra
label:t-algebra$
 18/0 Mathlib/Algebra/Field/Subfield/Basic.lean,Mathlib/FieldTheory/IntermediateField/Adjoin/Algebra.lean,Mathlib/FieldTheory/IntermediateField/Adjoin/Defs.lean 3 1 ['github-actions'] riccardobrasca
assignee:riccardobrasca
3-74318
3 days ago
16-22105
16 days ago
16-21818
16 days
39027 fpvandoorn
author:fpvandoorn
 feat: delaborators for inequalities in big operators `∏ i < n, f i` was already accepted as valid syntax, but this PR now also prints appropriate sums/products using this notation. --- [Zulip discussion](https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/missing.20delaborator.20for.20finsum) [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra t-meta
label:t-algebra$
 132/49 Mathlib/Algebra/BigOperators/Group/Finset/Defs.lean,MathlibTest/BigOps.lean 2 2 ['fpvandoorn', 'github-actions'] kim-em
assignee:kim-em
3-74317
3 days ago
4-24714
4 days ago
4-35028
4 days
37008 BryceT233
author:BryceT233
 feat(RingTheory/LocalRing): `IsLocalRing` for pullbacks We provide basic lemmas for equalizers and pullbacks of `RingHom` and `AlgHom`, and show they are local rings under suitable condtions. This is needed in #37940 to construct a residue algebra structure on pullbacks. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-ring-theory 167/0 Mathlib.lean,Mathlib/RingTheory/LocalRing/Pullback.lean 2 6 ['BryceT233', 'github-actions', 'wwylele'] riccardobrasca
assignee:riccardobrasca
3-68197
3 days ago
25-83908
25 days ago
60-51972
60 days
32983 JovanGerb
author:JovanGerb
 feat: use `LE.le` for subset relation in `Set`, `Finset`, `PSet`, `ZFSet` This PR allows the use of `⊆` notation while the underlying constant is `≤`. Similarly for `⊂`/`<`, `⊇`/`≥` and `⊃`/`>`. Some notes: - The idea is to later extend this feature to other set notation constants, such as union/intersection. - There are some types for which we cannot use `LE.le` as the underlying constant, because the API has already been developed in core using `HasSubset.Subset`. For example List. So, the elaborator for the `⊆` notation needs to make a decision for which underlying constant to elaborate to, depending on the type. Sometimes the type is not known yet, which makes things awkward. Most of these cases are solved by delaying the elaboration until later when the type is known. However, in some cases this doesn't work either, such as `simp_rw [and_comm (_ ⊆ _)]`, where it is impossible to tell the type when elaborating the term. So, some such cases need to be fixed by making it `simp_rw [and_comm (_ ≤ _)]`. - Dot notation on the `HasSubset.Subset` namespace now doesn't work anymore, and the names need to be put in the `LE.le` namespace instead. - Various `simp` and `gcongr` tags needed to be removed/updated as a result of this change. See also https://leanprover.zulipchat.com/#narrow/channel/113488-general/topic/Any.20infimum.20based.20version.20of.20.60OmegaCompletePartialOrder.60.3F/near/579333629 --- - [x] depends on: #36633 - [x] depends on: #36734 - [x] depends on: #36782 - [x] depends on: #37012 - [x] depends on: #37347 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-data t-meta large-import 289/435 Mathlib/Algebra/Algebra/Subalgebra/Lattice.lean,Mathlib/Algebra/Group/Indicator.lean,Mathlib/Algebra/Group/Pointwise/Finset/Basic.lean,Mathlib/Algebra/Group/Pointwise/Set/Basic.lean,Mathlib/Algebra/GroupWithZero/Action/Pointwise/Finset.lean,Mathlib/Algebra/GroupWithZero/Action/Pointwise/Set.lean,Mathlib/Algebra/Module/Torsion/Basic.lean,Mathlib/Algebra/MvPolynomial/Monad.lean,Mathlib/Algebra/Order/Monoid/Unbundled/Pow.lean,Mathlib/AlgebraicTopology/SimplicialSet/Horn.lean,Mathlib/Analysis/LocallyConvex/WeakSpace.lean,Mathlib/Analysis/Normed/Group/FunctionSeries.lean,Mathlib/Analysis/SpecialFunctions/Log/Summable.lean,Mathlib/CategoryTheory/CofilteredSystem.lean,Mathlib/CategoryTheory/Topos/Sheaf.lean,Mathlib/Combinatorics/Enumerative/Partition/GenFun.lean,Mathlib/Combinatorics/Hall/Basic.lean,Mathlib/Combinatorics/Matroid/Basic.lean,Mathlib/Combinatorics/Matroid/Constructions.lean,Mathlib/Combinatorics/Matroid/Dual.lean,Mathlib/Combinatorics/Matroid/Rank/Cardinal.lean,Mathlib/Combinatorics/SetFamily/AhlswedeZhang.lean,Mathlib/Combinatorics/SetFamily/KruskalKatona.lean,Mathlib/Combinatorics/SimpleGraph/Basic.lean,Mathlib/Combinatorics/SimpleGraph/Ends/Defs.lean,Mathlib/Data/Finset/BooleanAlgebra.lean,Mathlib/Data/Finset/Defs.lean,Mathlib/Data/Finset/Filter.lean,Mathlib/Data/Finset/Image.lean,Mathlib/Data/Finset/Lattice/Basic.lean,Mathlib/Data/Finset/Option.lean,Mathlib/Data/Finset/Powerset.lean,Mathlib/Data/Finset/SDiff.lean,Mathlib/Data/Finset/Sups.lean,Mathlib/Data/Fintype/Card.lean,Mathlib/Data/Multiset/ZeroCons.lean,Mathlib/Data/Rat/Star.lean,Mathlib/Data/Set/Basic.lean,Mathlib/Data/Set/Card.lean,Mathlib/Data/Set/Defs.lean,Mathlib/Data/Set/Disjoint.lean,Mathlib/Data/Set/Finite/Basic.lean,Mathlib/Data/Set/FiniteExhaustion.lean,Mathlib/Data/Set/Notation.lean,Mathlib/Data/Set/Semiring.lean,Mathlib/Data/Set/Sups.lean,Mathlib/Data/SetLike/Basic.lean,Mathlib/Dynamics/Ergodic/Ergodic.lean,Mathlib/Dynamics/FixedPoints/Prufer.lean,Mathlib/GroupTheory/CosetCover.lean,Mathlib/GroupTheory/GroupAction/Blocks.lean,Mathlib/Lean/Expr/ExtraRecognizers.lean,Mathlib/LinearAlgebra/AffineSpace/Simplex/Basic.lean,Mathlib/Logic/Equiv/PartialEquiv.lean,Mathlib/MeasureTheory/Covering/LiminfLimsup.lean,Mathlib/MeasureTheory/Function/AEEqOfIntegral.lean,Mathlib/MeasureTheory/Integral/DominatedConvergence.lean,Mathlib/MeasureTheory/Integral/IntegralEqImproper.lean,Mathlib/MeasureTheory/Measure/AEDisjoint.lean,Mathlib/MeasureTheory/Measure/Decomposition/RadonNikodym.lean,Mathlib/MeasureTheory/Measure/MeasureSpace.lean,Mathlib/MeasureTheory/Measure/MeasureSpaceDef.lean,Mathlib/MeasureTheory/Measure/Prokhorov.lean,Mathlib/MeasureTheory/Measure/Regular.lean,Mathlib/MeasureTheory/Measure/Stieltjes.lean,Mathlib/MeasureTheory/Measure/Typeclasses/Finite.lean,Mathlib/MeasureTheory/Measure/Typeclasses/SFinite.lean,Mathlib/MeasureTheory/SetSemiring.lean,Mathlib/NumberTheory/WellApproximable.lean,Mathlib/Order/Birkhoff.lean,Mathlib/Order/BooleanAlgebra/Set.lean,Mathlib/Order/Bounds/Basic.lean,Mathlib/Order/Filter/AtTopBot/Finset.lean,Mathlib/Order/Filter/Basic.lean,Mathlib/Order/Filter/CountableInter.lean,Mathlib/Order/Filter/Ker.lean,Mathlib/Order/Heyting/Basic.lean,Mathlib/Order/Interval/Finset/Defs.lean,Mathlib/Order/LiminfLimsup.lean,Mathlib/Order/PrimeSeparator.lean,Mathlib/Order/RelClasses.lean,Mathlib/Probability/Process/HittingTime.lean,Mathlib/RingTheory/AlgebraicIndependent/TranscendenceBasis.lean,Mathlib/RingTheory/Polynomial/Cyclotomic/Eval.lean,Mathlib/RingTheory/Spectrum/Prime/Module.lean,Mathlib/SetTheory/ZFC/Basic.lean,Mathlib/SetTheory/ZFC/Class.lean,Mathlib/SetTheory/ZFC/Ordinal.lean,Mathlib/SetTheory/ZFC/PSet.lean,Mathlib/Tactic/SetNotationForOrder.lean,Mathlib/Topology/Algebra/InfiniteSum/Constructions.lean,Mathlib/Topology/Algebra/InfiniteSum/SummationFilter.lean,Mathlib/Topology/Algebra/Nonarchimedean/TotallyDisconnected.lean,Mathlib/Topology/Category/TopCat/Limits/Konig.lean,Mathlib/Topology/Compactness/SigmaCompact.lean,Mathlib/Topology/ExtremallyDisconnected.lean,Mathlib/Topology/Instances/CantorSet.lean,Mathlib/Topology/MetricSpace/HausdorffDistance.lean,Mathlib/Topology/MetricSpace/Ultra/Basic.lean,Mathlib/Topology/Order/HullKernel.lean 106 50 ['JovanGerb', 'Vierkantor', 'b-mehta', 'eric-wieser', 'github-actions', 'j-loreaux', 'joneugster', 'leanprover-radar', 'mathlib-dependent-issues', 'mathlib-merge-conflicts', 'mathlib4-merge-conflict-bot', 'plp127', 'thorimur'] nobody
3-67548
3 days ago
3-67618
3 days ago
10-35998
10 days
38937 zw810-ctrl
author:zw810-ctrl
 API and proof of `isStrictMap_prodMap` --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-topology new-contributor large-import awaiting-author merge-conflict 82/3 Mathlib/Topology/Maps/Strict/Basic.lean 1 13 ['ADedecker', 'github-actions', 'mathlib-merge-conflicts', 'zw810-ctrl'] nobody
3-65280
3 days ago
12-68700
12 days ago
0-101
1 minute
38092 SnirBroshi
author:SnirBroshi
 chore(Order/Defs/Unbundled): deprecate `def Symmetric` in favor of `class Std.Symm` --- [Mathlib's `def Symmetric`](https://leanprover-community.github.io/mathlib4_docs/Mathlib/Order/Defs/Unbundled.html#Symmetric) [Core's `class Std.Symm`](https://leanprover-community.github.io/mathlib4_docs/Init/Core.html#Std.Symm) [Zulip](https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/Relation.20properties.20duplication/near/544638270) [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-order maintainer-merge 465/408 Archive/Wiedijk100Theorems/FriendshipGraphs.lean,Archive/Wiedijk100Theorems/Konigsberg.lean,Counterexamples/HeawoodUnitDistance.lean,Mathlib/Algebra/BigOperators/Group/List/Lemmas.lean,Mathlib/Algebra/Divisibility/Units.lean,Mathlib/Algebra/Group/Basic.lean,Mathlib/Analysis/BoxIntegral/Partition/Basic.lean,Mathlib/Analysis/BoxIntegral/Partition/Split.lean,Mathlib/Analysis/InnerProductSpace/Orthogonal.lean,Mathlib/Analysis/Normed/Operator/Compact/FredholmAlternative.lean,Mathlib/CategoryTheory/Abelian/Pseudoelements.lean,Mathlib/CategoryTheory/IsConnected.lean,Mathlib/CategoryTheory/Limits/Final.lean,Mathlib/CategoryTheory/Limits/IsConnected.lean,Mathlib/Combinatorics/Additive/ErdosGinzburgZiv.lean,Mathlib/Combinatorics/Digraph/Orientation.lean,Mathlib/Combinatorics/Graph/Basic.lean,Mathlib/Combinatorics/Graph/Delete.lean,Mathlib/Combinatorics/Graph/Lattice.lean,Mathlib/Combinatorics/Graph/Maps.lean,Mathlib/Combinatorics/SimpleGraph/AdjMatrix.lean,Mathlib/Combinatorics/SimpleGraph/Basic.lean,Mathlib/Combinatorics/SimpleGraph/Bipartite.lean,Mathlib/Combinatorics/SimpleGraph/Circulant.lean,Mathlib/Combinatorics/SimpleGraph/Clique.lean,Mathlib/Combinatorics/SimpleGraph/CompleteMultipartite.lean,Mathlib/Combinatorics/SimpleGraph/Connectivity/Connected.lean,Mathlib/Combinatorics/SimpleGraph/Dart.lean,Mathlib/Combinatorics/SimpleGraph/Density.lean,Mathlib/Combinatorics/SimpleGraph/Hall.lean,Mathlib/Combinatorics/SimpleGraph/Hasse.lean,Mathlib/Combinatorics/SimpleGraph/LineGraph.lean,Mathlib/Combinatorics/SimpleGraph/Maps.lean,Mathlib/Combinatorics/SimpleGraph/Operations.lean,Mathlib/Combinatorics/SimpleGraph/Prod.lean,Mathlib/Combinatorics/SimpleGraph/Regularity/Uniform.lean,Mathlib/Combinatorics/SimpleGraph/Subgraph.lean,Mathlib/Combinatorics/SimpleGraph/Sum.lean,Mathlib/Combinatorics/SimpleGraph/Triangle/Tripartite.lean,Mathlib/Combinatorics/SimpleGraph/Walk/Basic.lean,Mathlib/Combinatorics/SimpleGraph/Walk/Operations.lean,Mathlib/Data/Finset/Pairwise.lean,Mathlib/Data/Finsupp/BigOperators.lean,Mathlib/Data/List/Pairwise.lean,Mathlib/Data/List/Sigma.lean,Mathlib/Data/Multiset/Bind.lean,Mathlib/Data/Multiset/Defs.lean,Mathlib/Data/Multiset/Pairwise.lean,Mathlib/Data/Multiset/Replicate.lean,Mathlib/Data/Nat/GCD/Basic.lean,Mathlib/Data/Rel/Separated.lean,Mathlib/Data/Seq/Computation.lean,Mathlib/Data/Set/Pairwise/Basic.lean,Mathlib/Data/Set/Pairwise/List.lean,Mathlib/Data/Sym/Sym2.lean,Mathlib/Data/WSeq/Relation.lean,Mathlib/GroupTheory/Perm/Cycle/Factors.lean,Mathlib/GroupTheory/Perm/Cycle/Type.lean,Mathlib/GroupTheory/Perm/Support.lean,Mathlib/Logic/Function/Basic.lean,Mathlib/Logic/Relation.lean,Mathlib/MeasureTheory/Measure/AEDisjoint.lean,Mathlib/MeasureTheory/Measure/NullMeasurable.lean,Mathlib/ModelTheory/Graph.lean,Mathlib/ModelTheory/Semantics.lean,Mathlib/NumberTheory/ArithmeticFunction/Defs.lean,Mathlib/Order/Antichain.lean,Mathlib/Order/Defs/Unbundled.lean,Mathlib/Order/Disjoint.lean,Mathlib/Order/Lattice.lean,Mathlib/Order/Preorder/Chain.lean,Mathlib/Order/PropInstances.lean,Mathlib/RingTheory/Coprime/Ideal.lean,Mathlib/RingTheory/Radical/Basic.lean,Mathlib/Topology/CWComplex/Classical/Graph.lean,Mathlib/Topology/CompactOpen.lean,Mathlib/Topology/Connected/Clopen.lean,Mathlib/Topology/MetricSpace/MetricSeparated.lean,Mathlib/Topology/Separation/Basic.lean,Mathlib/Topology/Separation/GDelta.lean 80 8 ['SnirBroshi', 'dagurtomas', 'github-actions', 'leanprover-radar', 'mathlib-merge-conflicts'] nobody
3-64200
3 days ago
3-64239
3 days ago
35-50079
35 days
37934 Thmoas-Guan
author:Thmoas-Guan
 feat(FieldTheory): definition of transcendental separable field extension In this PR, we introduce the concept of separably generated field extension and transcendental separable field extension. Further properties will be in #37838 --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra
label:t-algebra$
 102/0 Mathlib.lean,Mathlib/FieldTheory/TranscendentalSeparable.lean 2 14 ['Thmoas-Guan', 'github-actions', 'robin-carlier'] robin-carlier
assignee:robin-carlier
3-60674
3 days ago
12-26804
12 days ago
20-44692
20 days
37953 Thmoas-Guan
author:Thmoas-Guan
 feat(RingTheory/Smooth): transcendental separable extension is formally smooth In this PR, we proved that transcendental separable extension is formally smooth via reduction to fg cases. --- - [ ] depends on: #37934 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-ring-theory blocked-by-other-PR 240/0 Mathlib.lean,Mathlib/FieldTheory/TranscendentalSeparable.lean,Mathlib/RingTheory/Smooth/Field.lean 3 2 ['github-actions', 'mathlib-dependent-issues'] nobody
3-60328
3 days ago
40-28152
40 days ago
0-84
1 minute
37838 Thmoas-Guan
author:Thmoas-Guan
 feat(FieldTheory): basic theories about transcendental separable extension The formalization of [Stacks 030W] via [Stacks 030U]. --- - [ ] depends on: #37934 - [ ] depends on: #39138 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra blocked-by-other-PR
label:t-algebra$
 634/32 Mathlib.lean,Mathlib/FieldTheory/SeparablyGenerated.lean,Mathlib/FieldTheory/TranscendentalSeparable.lean,Mathlib/RingTheory/LocalRing/ResidueField/Ideal.lean,Mathlib/RingTheory/Nilpotent/GeometricallyReduced.lean 5 4 ['github-actions', 'mathlib-bors', 'mathlib-dependent-issues', 'mathlib-merge-conflicts'] nobody
3-60176
3 days ago
41-25361
41 days ago
0-1271
21 minutes
39141 Thmoas-Guan
author:Thmoas-Guan
 feat(RingTheory/GeometricallyReduced): geometrically reduced is reduced for base change to arbitrary field In this PR, we proved that geometrically reduced algebra is reduced after base change to arbitrary field. --- - [ ] depends on: #37838 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-ring-theory blocked-by-other-PR 736/32 Mathlib.lean,Mathlib/FieldTheory/SeparablyGenerated.lean,Mathlib/FieldTheory/TranscendentalSeparable.lean,Mathlib/RingTheory/LocalRing/ResidueField/Ideal.lean,Mathlib/RingTheory/Nilpotent/GeometricallyReduced.lean 5 3 ['github-actions', 'mathlib-dependent-issues', 'mathlib-merge-conflicts'] nobody
3-60163
3 days ago
12-26222
12 days ago
0-986
16 minutes
36936 Rida-Hamadani
author:Rida-Hamadani
 feat(CategoryTheory): PBW Theorem --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-category-theory 142/0 Mathlib/CategoryTheory/Monad/PBW.lean 1 1 ['github-actions'] nobody
3-60055
3 days ago
unknown
0-0
0 seconds
39519 kbuzzard
author:kbuzzard
 perf: make WithVal.instRing irreducible After the API has been made, there should no reason to unfold this instance. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-topology WIP 10/1 Mathlib/NumberTheory/Padics/WithVal.lean,Mathlib/RingTheory/DedekindDomain/AdicValuation.lean,Mathlib/RingTheory/DedekindDomain/FiniteAdeleRing.lean,Mathlib/Topology/Algebra/Valued/WithVal.lean 4 4 ['eric-wieser', 'github-actions', 'kbuzzard', 'leanprover-radar'] nobody
3-58172
3 days ago
4-81782
4 days ago
0-132
2 minutes
32035 Thmoas-Guan
author:Thmoas-Guan
 feat(RingTheory): localization of Gorenstein local ring In this PR, we proved that localization of Gorenstein local ring at prime is again Gorenstein. --- - [ ] depends on: #31884 - [ ] depends on: #32033 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) blocked-by-other-PR t-ring-theory 553/0 Mathlib.lean,Mathlib/Algebra/Category/ModuleCat/ChangeOfRings.lean,Mathlib/Algebra/Category/ModuleCat/ChangeOfRingsExact.lean,Mathlib/Algebra/Category/ModuleCat/Ext/Baer.lean,Mathlib/Algebra/Category/ModuleCat/Ext/RingEquiv.lean,Mathlib/Algebra/Category/ModuleCat/InjectiveDimension.lean,Mathlib/Algebra/Homology/ShortComplex/ModuleCat.lean,Mathlib/RingTheory/Gorenstein/Defs.lean,Mathlib/RingTheory/Gorenstein/Localization.lean 9 12 ['github-actions', 'mathlib-merge-conflicts', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
3-56582
3 days ago
179-49300
179 days ago
0-862
14 minutes
36439 xgenereux
author:xgenereux
 feat(Algebra/Adjoin): CoeDep instances for Algebra.adjoin on singletons It is a common occurrence that I need to consider an element `x` or some polynomial evaluated in `x`, `p.eval x` as an element of `Algebra.adjoin R {x}`. This makes it so that we can write - `(x : adjoin R {x})` instead of `⟨x, self_mem_adjoin_singleton A x⟩` - `(p.eval x : adjoin R {x})` instead of `⟨p.aeval x, aeval_mem_adjoin_singleton A x⟩` This is particularly useful when we need to write the type anyways, so that we need not to write `(⟨p.aeval x, aeval_mem_adjoin_singleton A x⟩ : adjoin R {x})` anymore. Co-authored-by: María Inés de Frutos Fernández <[mariaines.dff@gmail.com](mailto:mariaines.dff@gmail.com)> --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-ring-theory t-algebra
label:t-algebra$
 33/3 Mathlib/Algebra/Algebra/Subalgebra/Lattice.lean,Mathlib/RingTheory/Adjoin/Polynomial/Basic.lean 2 21 ['Vierkantor', 'chrisflav', 'github-actions', 'jcommelin', 'mathlib-merge-conflicts', 'riccardobrasca', 'xgenereux'] riccardobrasca
assignee:riccardobrasca
3-56384
3 days ago
24-25216
24 days ago
59-62236
59 days
38993 CBirkbeck
author:CBirkbeck
 feat(NumberTheory/ModularForms): Sturm bound for level-1 modular forms The Sturm bound for level 1: a modular form `f : ModularForm 𝒮ℒ k` whose q-expansion has order strictly greater than `k / 12` is identically zero. Also restates `dimension_level_one` more cleanly using `Nat.ModEq` and `k / 12`, and adds a small `CuspForm.discriminantEquiv` API needed by the proof. - [x] depends on: #38806 This PR was done with the help of Claude Code. t-number-theory LLM-generated 137/42 Mathlib/NumberTheory/ModularForms/Basic.lean,Mathlib/NumberTheory/ModularForms/CuspFormSubmodule.lean,Mathlib/NumberTheory/ModularForms/LevelOne/DimensionFormula.lean,Mathlib/NumberTheory/ModularForms/QExpansion.lean 4 66 ['CBirkbeck', 'MichaelStollBayreuth', 'github-actions', 'grunweg', 'loefflerd', 'mathlib-dependent-issues', 'mathlib-merge-conflicts'] MichaelStollBayreuth
assignee:MichaelStollBayreuth
3-55464
3 days ago
3-55530
3 days ago
10-18209
10 days
39558 b-mehta
author:b-mehta
 feat(Data/Finset/Prod): count the number of ordered pairs in a set These proofs were written a while ago, so they may be golfable --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-data 21/0 Mathlib/Data/Finset/Prod.lean 1 2 ['github-actions', 'plp127'] nobody
3-54919
3 days ago
3-82274
3 days ago
3-81985
3 days
39524 FordUniver
author:FordUniver
 feat(MeasureTheory/Integral/CurveIntegral): integrability and FTC along a line segment Specialises curve integration to the line segment between two points: smoothness of the segment as a `C¹` curve, sufficient conditions for a continuous one-form to be integrable along a segment, and a fundamental-theorem-of-calculus identity for the segment integral of a Fréchet derivative. Adds a new `Segment` section to `AffineMap.lean` that includes some previously existing results. --- Used by a [planned descent-lemma PR for Lipschitz-smooth functions](https://github.com/FordUniver/mathlib4/blob/5ebc6dae88deb11410d21c0a2628f53c092bb536/Mathlib/Analysis/Calculus/LipschitzSmooth/FDeriv.lean#L133), which needs an FTC along an affine line to integrate a directional derivative over a segment. Three points to highlight: 1. I thought about renaming `curveIntegrable_segment` to `curveIntegrable_segment_iff` for consistency with the file's other `_iff`-suffixed biconditionals, but the new `_const` takes a different name slot, so the rename would be an unnecessary public API break. 2. `Path.segment_contDiffOn` is really a fact about `Path.segment` rather than about curve integration, so it would more naturally live in `Convex/PathConnected.lean`. Unfortunately that target is blocked by a build cycle (`Calculus.AddTorsor.AffineMap` already transitively imports `Convex.PathConnected` via `Convex.Topology`/`Convex.StdSimplex`), so it sits with its consumer here. 3. The new `Continuous{,On}.curveIntegrable_segment` lemmas are the obvious `@[fun_prop]` candidates, but `CurveIntegrable` isn't a registered `fun_prop` concept yet; that registration is a small design call (identity/constant/composition choices, plus tagging the file's pre-existing producers) worth its own focused review and is deferred to a follow-up. `Path.segment_contDiffOn` carries the tag since `ContDiffOn` is already registered. - [ ] depends on: #39206 Diff for the changes *just* in this PR over its predecessor: [link](https://github.com/FordUniver/mathlib4/compare/feat/lineMap-contDiff...feat/curveIntegral-segment-FTC) t-measure-probability blocked-by-other-PR 106/18 Mathlib/Analysis/Calculus/AddTorsor/AffineMap.lean,Mathlib/MeasureTheory/Integral/CurveIntegral/Basic.lean,Mathlib/MeasureTheory/Integral/CurveIntegral/Poincare.lean 3 2 ['github-actions', 'mathlib-dependent-issues'] nobody
3-45497
3 days ago
4-45200
4 days ago
0-2904
48 minutes
38866 j-mayoral
author:j-mayoral
 feat(PresentedGroup): free-product of presentations is isomorphic to the presentation of the union (over the disjoint union of generators) --- Adds the theorem that the free product of presentations is isomorphic to the presentation on the disjoint union of the generators with the union of the relations. That is, `<α | R₁> * <β | R₂> ≃* <α ⊕ β | iα(R₁) ∪ iβ(R₂)>`. Don't know if the current file is the best to add this result. I have the feeling this could be made more elegant, avoiding the need to state lemmas explicitly about the relations of the canonical maps, by instead working with relations on the free product of free groups and then studying how quotienting by relations behaves in terms of isomorphisms. However, that approach is less straightforward, so I prefer to keep the current PR as is and discuss possible refinements there to get better feedback (I’m new and still learning). [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor t-group-theory large-import maintainer-merge 65/5 Mathlib/Algebra/Group/Subgroup/Basic.lean,Mathlib/GroupTheory/PresentedGroup.lean 2 38 ['github-actions', 'j-mayoral', 'kbuzzard', 'tb65536'] tb65536
assignee:tb65536
3-44430
3 days ago
3-45290
3 days ago
14-50529
14 days
38189 artie2000
author:artie2000
 feat: simplify proof of `IsAdjoinRootMonic.mkOfAdjoinEqTop'` * Simplify the proof of `IsAdjoinRootMonic.mkOfAdjoinEqTop'` by factoring out a lemma `OrzechProperty.bijective_of_surjective_of_finrank_le` and making use of the existing lemma `finrank_le_iff_exists_linearMap`. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-ring-theory delegated 22/21 Mathlib/LinearAlgebra/Dimension/Free.lean,Mathlib/RingTheory/IsAdjoinRoot.lean 2 9 ['Vierkantor', 'artie2000', 'github-actions', 'mathlib-bors', 'riccardobrasca'] riccardobrasca
assignee:riccardobrasca
3-42904
3 days ago
10-41833
10 days ago
24-41408
24 days
39109 mbkybky
author:mbkybky
 feat(RingTheory/LocalProperties): `Module.FinitePresentation` is a local property We show that if there exists a set `{ r }` of `R` such that `Mᵣ` is a finitely presented `Rᵣ`-module for each `r`, then `M` is a finitely presented `R`-module. Co-authored-by: Sihan Su @su00000 Co-authored-by: Yi Song @syur2 From the [Local Properties of Modules](https://github.com/mbkybky/module_localProperties) project. - [x] depends on: #39112 --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-ring-theory maintainer-merge 102/10 Mathlib.lean,Mathlib/RingTheory/LocalProperties/FinitePresentation.lean,Mathlib/RingTheory/Localization/Finiteness.lean 3 9 ['github-actions', 'mathlib-dependent-issues', 'mbkybky', 'riccardobrasca', 'robin-carlier'] nobody
3-42044
3 days ago
11-26311
11 days ago
13-10368
13 days
39484 rosborn
author:rosborn
 refactor(GroupTheory/Torsion): make primaryComponent total Change `primaryComponent` to the `IsPGroup`-style `{g | ∃ k, g ^ p ^ k = 1}`, making the definitions total over `p : ℕ` without requiring `[Fact p.Prime]`. --- Needed to use `primaryComponent` under a binder where it can't synthesize `[Fact p.Prime]` (e.g., `⨆ p : (Nat.card G).primeFactors, primaryComponent G p.val` and similar family-shaped `iSup` / `Finset.prod` patterns). The new carrier agrees with the previous `{g | ∃ n, orderOf g = p^n}` on primes, so existing `[Fact p.Prime]` API is unaffected. Discussed on [Zulip](https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/.60.5BFact.20p.2EPrime.5D.60.20in.20.60CommGroup.2EprimaryComponent.60/with/595535434) t-group-theory maintainer-merge 89/64 Mathlib/GroupTheory/Torsion.lean 1 13 ['github-actions', 'rosborn', 'tb65536'] tb65536
assignee:tb65536
3-40310
3 days ago
3-40298
3 days ago
5-8876
5 days
39571 FordUniver
author:FordUniver
 feat(Combinatorics/SimpleGraph): canonical projection and representative between labeled and unlabeled copies Introduces canonical projection and noncomputable representative functions between labeled and unlabeled copies (and their embedding analogues) in `SimpleGraph`, in the spirit of `Quot.mk` / `Quot.out`. The pair gives a name to a construction that previously appeared as inlined anonymous-constructor and destructuring patterns; two pre-existing proofs in `Copy.lean` and `InducedCopy.lean` are tightened by routing through the new functions instead. --- Split out from a downstream PR introducing `SimpleGraph.Aut` and the orbit-stabiliser identities for copies and embeddings, where the projection and representative primitives recur in fiber decompositions and product equivalences. Sits on top of the `Copy` / `InducedCopy` [stack](https://github.com/leanprover-community/mathlib4/pull/38631) and inherits the "large-import" tag from it. - [ ] depends on: #38631 Diff for the changes *just* in this PR over its predecessor: [link](https://github.com/FordUniver/mathlib4/compare/feat/ind-copy-count...feat/copy-toUnlabeled-out) t-combinatorics large-import blocked-by-other-PR 644/325 Mathlib.lean,Mathlib/Combinatorics/SimpleGraph/Copy.lean,Mathlib/Combinatorics/SimpleGraph/InducedCopy.lean,Mathlib/Combinatorics/SimpleGraph/LineGraph.lean,Mathlib/Combinatorics/SimpleGraph/Subgraph.lean 5 2 ['github-actions', 'mathlib-dependent-issues'] nobody
3-37093
3 days ago
3-37094
3 days ago
0-589
9 minutes
38931 FordUniver
author:FordUniver
 chore(Combinatorics/SimpleGraph/Copy): replace classical Fintype.card with Nat.card Replaces definitions of `copyCount` and `unlabeledCopyCount` with `Nat.card` instead of `Fintype.card` as well as several `Fintype` occurrences with `Finite`. The body of `uniqueUnlabeledCopyBot` is restructured to use `Finite.injective_iff_surjective` since the `Fintype.card_congr` route no longer applies under the weakened `[Finite W]` hypothesis. Adds public `copyCount_eq_nat_card` and `unlabeledCopyCount_eq_nat_card` bridge lemmas so downstream files can characterize the counts (e.g. for `Nat.card_le_card_of_injective` bridging in `InducedCopy.lean`) without unfolding. --- **Step 4/5 of the `Copy` / `InducedCopy` refactor-feat stack.** As suggested in #38631 by @SnirBroshi and @YaelDillies. I went with `Nat` over `ENat` based on Yael's preference (but I think that could easily be changed to `ENat`). Quite a bit of churn was needed as a consequence. - [ ] depends on: #38843 Diff for the changes *just* in this PR over its predecessor: [link](https://github.com/FordUniver/mathlib4/compare/chore/copy-expose...chore/copy-nat-card) new-contributor t-combinatorics large-import blocked-by-other-PR 272/258 Mathlib/Combinatorics/SimpleGraph/Copy.lean 1 7 ['FordUniver', 'SnirBroshi', 'github-actions', 'mathlib-bors', 'mathlib-dependent-issues'] nobody
3-36977
3 days ago
18-30558
18 days ago
0-2006
33 minutes
38843 FordUniver
author:FordUniver
 chore(Combinatorics/SimpleGraph/Copy): replace file-wide @[expose] with selective exposure Removes the file-wide `@[expose] public section` and restores selective `@[expose]` only on the small constructive `def`s that need cross-module reduction: `Copy.toEmbedding`, `Copy.id`, `Copy.ofLE`, `Copy.topEmbedding` — each has an exported `@[simp]` lemma proved by `rfl` that needs the definition unfolded to typecheck. Replaces `@[simps!]` on `topEmbedding` with an explicit `@[simp] topEmbedding_apply` to avoid a private `_proof_1` term leaking into generated lemma names; adds `toEmbedding_apply` to match the existing `toHom_apply`. Switches `IsIndContained` from `def` to `abbrev` so the structural alias `Nonempty (G ↪g H)` stays transparent, matching `IsContained` and `Free`. --- **Step 3/5 of the `Copy` / `InducedCopy` refactor-feat stack.** The noncomputable counts `copyCount` and `unlabeledCopyCount` are deliberately *not* exposed (see [@plp127's review](https://github.com/leanprover-community/mathlib4/pull/38631#discussion_r3161902380) on #38631 explaining that unfolding a `classical`-`Fintype.card` body is rarely what you want); the downstream consumers in #38631 bridge via public `*_eq_nat_card` lemmas introduced in #38931 instead. - [ ] depends on: #38745 Diff for the changes *just* in this PR over its predecessor: [link](https://github.com/FordUniver/mathlib4/compare/chore/copy-spelling...chore/copy-expose) t-combinatorics new-contributor blocked-by-other-PR 245/246 Mathlib/Combinatorics/SimpleGraph/Copy.lean 1 4 ['github-actions', 'mathlib-bors', 'mathlib-dependent-issues'] nobody
3-36964
3 days ago
9-43301
9 days ago
0-76500
21 hours
38631 FordUniver
author:FordUniver
 feat(Combinatorics/SimpleGraph/InducedCopy): add `UnlabeledEmbedding`, `unlabeledEmbeddingCount` and `embeddingCount` Extracts the induced-containment material from `SimpleGraph/Copy.lean` into a new `SimpleGraph/InducedCopy.lean` and adds the induced analogues of `UnlabeledCopy`/`copyCount`/`unlabeledCopyCount`: a type `UnlabeledEmbedding G H` for induced subgraphs of `H` isomorphic to `G`, a count `H.embeddingCount G := Nat.card (G ↪g H)` for induced labeled copies (i.e. graph embeddings), and a count `H.unlabeledEmbeddingCount G := Nat.card (G.UnlabeledEmbedding H)` for induced unlabelled copies, each with the parallel `_of_isEmpty` / `_eq_zero` / `_pos` / `_le_*` / `_eq_nat_card` API. `IsIndContained`, the `⊴` notation, `IndFree`, and all related lemmas move from `Copy.lean` to the new file. `Embedding.range_toSubgraph` characterises induced subgraphs as the range of `Embedding.toSubgraph : (G ↪g H) → H.Subgraph` and bridges `embeddingCount` to `unlabeledEmbeddingCount`. --- **Final step 5/5 of the `Copy` / `InducedCopy` refactor stack.** The new file mirrors `Copy.lean`'s organisation (containment → counting → killing sections) for the induced row; the killing-induced-copies machinery is left as a TODO. Naming follows the convention established in #38745: types are guest-first (`UnlabeledEmbedding G H`, `IsIndContained G H`), operations host-first (`H.embeddingCount G`, `H.unlabeledEmbeddingCount G`). The induced labelled type is `Embedding`, i.e., `G ↪g H`, directly. Two bookkeeping changes in `Copy.lean`: `Copy.isContained` / `Embedding.isContained` / `Iso.isContained`/`'` and `isContained_iff_exists_le_comap`, which lived in the now-deleted "Induced containment" section but are non-induced, move up into the `IsContained` section. `LineGraph.lean`'s `Copy` import switches to `InducedCopy` since it uses `IsIndContained`. The cross-module proofs `embeddingCount_le_copyCount` and `unlabeledEmbeddingCount_le_unlabeledCopyCount` bridge through the public `copyCount_eq_nat_card`/`unlabeledCopyCount_eq_nat_card` lemmas introduced in #38931 (the counts themselves remain unexposed per @plp127's review). `Embedding.ofIsInduced` (used by `Embedding.range_toSubgraph`) comes from the independent prerequisite #39288. | | labeled | unlabeled | |---|---|---| | ordinary | `Copy` / `copyCount` | `UnlabeledCopy` / `unlabeledCopyCount` | | induced | `Embedding` / `embeddingCount` | `UnlabeledEmbedding` / `unlabeledEmbeddingCount` | This branch sits on top of an octopus-merge diffbase (`FordUniver:diffbase/ind-copy-count`) of `chore/copy-nat-card` and `feat/subgraph-ofIsInduced`, so the link below shows only the changes intrinsic to this PR. - [ ] depends on: #38931 - [ ] depends on: #39288 Diff for the changes *just* in this PR over its predecessors: [link](https://github.com/FordUniver/mathlib4/compare/diffbase/ind-copy-count...feat/ind-copy-count). t-combinatorics new-contributor blocked-by-other-PR large-import 635/343 Mathlib.lean,Mathlib/Combinatorics/SimpleGraph/Copy.lean,Mathlib/Combinatorics/SimpleGraph/InducedCopy.lean,Mathlib/Combinatorics/SimpleGraph/LineGraph.lean,Mathlib/Combinatorics/SimpleGraph/Subgraph.lean 5 41 ['FordUniver', 'SnirBroshi', 'YaelDillies', 'github-actions', 'mathlib-bors', 'mathlib-dependent-issues', 'plp127'] nobody
3-36942
3 days ago
21-54860
21 days ago
2-46521
2 days
38957 wwylele
author:wwylele
 chore(GroupTheory/DivisibleHull): remove `backward.privateInPublic` --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) tech debt t-group-theory awaiting-zulip 5/12 Mathlib/GroupTheory/DivisibleHull.lean 1 11 ['Komyyy', 'github-actions', 'grunweg', 'jcommelin', 'wwylele'] jcommelin
assignee:jcommelin
3-36055
3 days ago
3-36055
3 days ago
13-78350
13 days
39569 AlexBrodbelt
author:AlexBrodbelt
 feat(Mathlib/Data/Finite/Units): Units are (in)finite if type is (in)finite Shows - [ ] depends on: #39568 - [ ] depends on: #39567 --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) blocked-by-other-PR t-data new-contributor 75/0 Mathlib.lean,Mathlib/Data/Finite/Option.lean,Mathlib/Data/Finite/Subtype.lean,Mathlib/Data/Finite/Units.lean 4 3 ['github-actions', 'mathlib-dependent-issues'] nobody
3-35708
3 days ago
3-41593
3 days ago
0-121
2 minutes
35216 kim-em
author:kim-em
 doc(Tactic/Translate/ToDual): add deployment guide for @[to_dual] This PR expands the documentation for `@[to_dual]` with practical advice for deploying it to existing code. **Module docstring** (`Mathlib/Tactic/Translate/ToDual.lean`): adds a "Deploying `@[to_dual]` to existing code" section covering name agreement, attribute propagation, docstring syntax ordering, declaration order dependencies, and known structural mismatches (conjunct reordering, type class gaps, interval argument swapping). **Attribute docstring**: adds a note that `@[simp]` is not auto-copied (must use `(attr := simp)`), and shows the correct ordering when combining `(attr := ...)` with docstrings. 🤖 Prepared with Claude Code --- @joneugster: this is no longer part of the PR, so I removed it from the description: > **Agent skill** (`.claude/skills/to_dual/SKILL.md`): detailed step-by-step instructions for an AI agent deploying `@[to_dual]`, including how to identify candidates, common patterns, and debugging. documentation LLM-generated maintainer-merge 31/3 Mathlib/Tactic/Translate/ToDual.lean 1 37 ['JovanGerb', 'MichaelStollBayreuth', 'faenuccio', 'github-actions', 'joneugster', 'kim-em', 'mathlib-merge-conflicts', 'vihdzp'] joneugster
assignee:joneugster
3-35359
3 days ago
34-82131
34 days ago
41-68528
41 days
39552 themathqueen
author:themathqueen
 chore(RingTheory/Bialgebra/Hom): `toCoalgHom` as prefix for `simps` There are currently no generated `simps` lemmas for these, so this is a straightforward change. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-ring-theory maintainer-merge 1/1 Mathlib/RingTheory/Bialgebra/Hom.lean 1 2 ['YaelDillies', 'github-actions'] nobody
3-35057
3 days ago
4-3412
4 days ago
4-3487
4 days
38409 chrisflav
author:chrisflav
 feat(RingTheory): totally split algebras over a field We show that for a totally split algebra over a field, the `k`-rational points are in bijection with the prime spectrum. We also show that an étale algebra over a separably closed field is totally split. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-ring-theory large-import 123/2 Mathlib/Algebra/Algebra/Pi.lean,Mathlib/FieldTheory/IsSepClosed.lean,Mathlib/RingTheory/Artinian/Module.lean,Mathlib/RingTheory/Etale/Basic.lean,Mathlib/RingTheory/Etale/Field.lean,Mathlib/RingTheory/TotallySplit.lean 6 2 ['github-actions', 'mathlib-merge-conflicts'] mariainesdff
assignee:mariainesdff
3-33237
3 days ago
3-33314
3 days ago
27-77335
27 days
39576 plp127
author:plp127
 chore(Topology): generalize `Topology.IsEmbedding.perfectlyNormalSpace` Generalize theorem `Topology.IsEmbedding.perfectlyNormalSpace` to inducing maps. Generalize some other theorem along the way. Rename `isGδ_induced` to `IsGδ.preimage`, to match `IsOpen.preimage` and `IsClosed.preimage`. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-topology 29/27 Mathlib/Topology/Baire/LocallyCompactRegular.lean,Mathlib/Topology/GDelta/Basic.lean,Mathlib/Topology/Separation/GDelta.lean,Mathlib/Topology/Separation/PerfectlyNormal.lean,Mathlib/Topology/Separation/Regular.lean 5 1 ['github-actions'] nobody
3-30474
3 days ago
3-31065
3 days ago
3-32208
3 days
39573 FordUniver
author:FordUniver
 feat(Combinatorics/SimpleGraph/Automorphism): `Aut`, `autCount`, and orbit-stabiliser for copies and embeddings Introduces the type `Aut G := G ≃g G` of graph automorphisms and the corresponding count `autCount G`, then uses the orbit-stabiliser principle on both `Copy G H` and `Embedding G H` to prove `H.copyCount G = H.unlabeledCopyCount G * G.autCount` and `H.embeddingCount G = H.unlabeledEmbeddingCount G * G.autCount`. In both, the labeled copies decompose as a disjoint union of fibers indexed by the corresponding unlabelled copies, with each fiber a torsor under `Aut G`. The fiber-action machinery and the sigma decompositions are the substantive content; the two multiplicative identities are the corollaries. --- The main achievement is to allow the user to freely convert between `{copy,embedding}Count` and `unlabeled{copy,embedding}Count` through `autCount`. Sits on top of the `Copy` / `InducedCopy` refactor-feat stack (final step #38631), plus a small prerequisite (#39571) extracting the standalone `Quot.mk` / `Quot.out`-style toolage between labeled and unlabeled copies. - [ ] depends on: #39571 Diff for the changes *just* in this PR over its predecessor: [link](https://github.com/FordUniver/mathlib4/compare/feat/copy-toUnlabeled-out...feat/simplegraph-aut) t-combinatorics large-import blocked-by-other-PR 936/325 Mathlib.lean,Mathlib/Combinatorics/SimpleGraph/Automorphism.lean,Mathlib/Combinatorics/SimpleGraph/Copy.lean,Mathlib/Combinatorics/SimpleGraph/InducedCopy.lean,Mathlib/Combinatorics/SimpleGraph/LineGraph.lean,Mathlib/Combinatorics/SimpleGraph/Subgraph.lean 6 2 ['github-actions', 'mathlib-dependent-issues'] nobody
3-29891
3 days ago
3-29893
3 days ago
0-1714
28 minutes
37747 JovanGerb
author:JovanGerb
 chore(Order/Filter/AtTopBot/Basic): use `to_dual` This PR uses `to_dual` for `atTop`/`atBot`. A lot of theorems that have been tagged contain the expression `∀ a ≥ b, ...`, which means that their dual will be `∀ a, b ≥ a → ...`, which is obviourly undesirable. Hence, I would like to ask the reviewers to reconsider the possibility of merging #32985. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-order awaiting-author 56/164 Mathlib/Order/Filter/AtTopBot/Basic.lean 1 6 ['Komyyy', 'github-actions'] bryangingechen
assignee:bryangingechen
3-29516
3 days ago
3-29516
3 days ago
41-84436
41 days
39518 abeldonate
author:abeldonate
 feat(RingTheory/LocalProperties/Projective): Projective Module theorem Theorem: R Noetherian, M finitely generated R-Mod. Then: M projective iff M_m free for all m maximal t-ring-theory new-contributor large-import 21/0 Mathlib/RingTheory/LocalProperties/Projective.lean 1 8 ['abeldonate', 'github-actions', 'mbkybky'] nobody
3-27922
3 days ago
3-27922
3 days ago
3-69888
3 days
38906 lua-vr
author:lua-vr
 feat(ConditionallyCompleteLattice/Indexed): add binary versions of lemmas Add binary versions of some of the lemmas. Those are useful when the domain is indexed over the members of a set. From the Carleson project. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-order carleson 21/5 Mathlib/Order/ConditionallyCompleteLattice/Indexed.lean 1 19 ['JovanGerb', 'SnirBroshi', 'github-actions', 'grunweg', 'lua-vr', 'mathlib-merge-conflicts'] nobody
3-27445
3 days ago
3-27510
3 days ago
13-1207
13 days
39567 AlexBrodbelt
author:AlexBrodbelt
 feat(Mathlib/Data/Finite/Option): option type is finite iff type is finite Option type is finite if and only if the type is finite. This is an intermediate result to proving that if the `GroupWithZero` is (in)finite then the `Units` are (in)finite. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-data new-contributor 25/0 Mathlib.lean,Mathlib/Data/Finite/Option.lean 2 11 ['AlexBrodbelt', 'github-actions', 'plp127', 'themathqueen'] nobody
3-27060
3 days ago
3-43111
3 days ago
3-43436
3 days
39568 AlexBrodbelt
author:AlexBrodbelt
 feat(Mathlib/Data/Finite/Subtype): Subtype of elements not equal to a term is finite iff type is finite Subtype of terms not equal to a term is finite iff type is finite. This is an intermediate result to prove that if a `GroupWithZero` is (in)finite then the `Units` are (in)finite. - [ ] depends on: #39567 [shows option type is finite iff type is finite] --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-data new-contributor blocked-by-other-PR 45/0 Mathlib.lean,Mathlib/Data/Finite/Option.lean,Mathlib/Data/Finite/Subtype.lean 3 5 ['AlexBrodbelt', 'github-actions', 'mathlib-dependent-issues', 'themathqueen'] nobody
3-25344
3 days ago
3-40934
3 days ago
0-2171
36 minutes
32692 WilliamCoram
author:WilliamCoram
 feat: define multivariate restricted power series We define multivariate restricted power series over a normed ring R, and show the properties that they form a ring when R has the ultrametric property. This work generalises my previous work in #26089 which will need to be refactored. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-ring-theory t-number-theory new-contributor 159/0 Mathlib.lean,Mathlib/Algebra/Order/Antidiag/Prod.lean,Mathlib/Algebra/Order/Antidiag/Tendsto.lean,Mathlib/RingTheory/MvPowerSeries/Restricted.lean 4 47 ['WilliamCoram', 'erdOne', 'github-actions', 'jcommelin', 'mathlib-merge-conflicts'] jcommelin
assignee:jcommelin
3-23830
3 days ago
3-23898
3 days ago
45-85631
45 days
39562 eric-wieser
author:eric-wieser
 perf(WithVal): avoid Equiv.ring --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) * depends on: #39563 t-topology 40/20 Mathlib/Topology/Algebra/Valued/WithVal.lean 1 5 ['eric-wieser', 'github-actions', 'leanprover-radar'] nobody
3-21650
3 days ago
3-59192
3 days ago
3-58947
3 days
39583 WilliamCoram
author:WilliamCoram
 refactor: change definition of restricted power series to align with restricted multivariate power series Previously, restricted power series were defined in terms of a `tendsto atTop` this has been changed to be an abbrev of `MvPowerSeries.IsRestricted` with `isRestricted_iff` lemmas to convert to nicer usable definitions. --- - [ ] depends on: #32692 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-ring-theory blocked-by-other-PR 232/142 Mathlib.lean,Mathlib/Algebra/Order/Antidiag/Prod.lean,Mathlib/Algebra/Order/Antidiag/Tendsto.lean,Mathlib/RingTheory/MvPowerSeries/Restricted.lean,Mathlib/RingTheory/PowerSeries/Restricted.lean 5 3 ['github-actions', 'mathlib-bors', 'mathlib-dependent-issues'] nobody
3-20978
3 days ago
3-21876
3 days ago
0-2156
35 minutes
39582 plp127
author:plp127
 chore: unsimp `Set.coe_setOf` See [#mathlib4 > `Set.coe_setOf` @ 💬](https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/.60Set.2Ecoe_setOf.60/near/579579409) --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) awaiting-CI t-data 20/25 Mathlib/AlgebraicTopology/SimplicialSet/StdSimplex.lean,Mathlib/Analysis/SpecialFunctions/Trigonometric/Inverse.lean,Mathlib/CategoryTheory/GradedObject/Monoidal.lean,Mathlib/CategoryTheory/Sites/Coherent/RegularSheaves.lean,Mathlib/CategoryTheory/Sites/IsSheafFor.lean,Mathlib/CategoryTheory/Sites/Sieves.lean,Mathlib/Combinatorics/SimpleGraph/Connectivity/Finite.lean,Mathlib/Data/Set/Basic.lean,Mathlib/Data/Set/Finite/Lattice.lean,Mathlib/GroupTheory/Perm/Finite.lean 10 1 ['github-actions'] nobody
3-19449
3 days ago
3-24721
3 days ago
0-2
2 seconds
37350 aditya-ramabadran
author:aditya-ramabadran
 feat(Analysis/Distribution): define canonical maps between Schwartz/test functions, distributions/tempered distributions Defines these canonical maps: (1) continuous linear map from $\mathcal D$ to $\mathcal S$, and (2) induced (linear) restriction map from $\mathcal S'$ to $\mathcal D'$, as assigned by @ADedecker. --- Put in a separate file since Distribution.lean only imports TestFunction right now and I thought it was cleaner to do in a new bridge file with both the maps. Open to changing this though. * Made use of #36445 (proved first map locally on fixed support spaces first by local seminorm estimates, then used limitCLM) * Needed a real to complex bridge `TestFunction.ToComplexSchwartzMap` since distributions are defined on real-valued test functions but tempered distributions in mathlib are defined on complex-valued Schwartz functions * Induced map $\mathcal S'(E,F) \to \mathcal D'(Ω,F)$ is $\mathbb C$-linear The main important defs are `ContDiffMapSupportedIn.toSchwartzMapCLM` which is the local fixed-support part, then `TestFunction.toSchwartzMapCLM` (where the continuity uses limitCLM to glue the local continuous linear maps on each $\mathcal D_K$), and `TemperedDistribution.toDistributionLM` which is the linear map from tempered distributions to ordinary distributions. Tested with `lake env lean Mathlib/Analysis/Distribution/TestFunctionSchwartz.lean` [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-analysis new-contributor 225/0 Mathlib.lean,Mathlib/Analysis/Distribution/TestFunctionSchwartz.lean 2 24 ['aditya-ramabadran', 'github-actions', 'j-loreaux'] ADedecker and mcdoll
assignee:mcdoll assignee:ADedecker
3-19019
3 days ago
12-24193
12 days ago
44-24200
44 days
38869 TJHeeringa
author:TJHeeringa
 feat(Analysis/InnerProductSpace): Add instance for quotient of InnerProductSpace --- Couldn't find the inner product space instance for a quotient of an inner product space. After confirming at [#Is there code for X? > Quotient of inner product space is inner product space](https://leanprover.zulipchat.com/#narrow/channel/217875-Is-there-code-for-X.3F/topic/Quotient.20of.20inner.20product.20space.20is.20inner.20product.20space/with/592464432), I made this PR. Defines an innerProductSpace instance on the quotient based on the isometry with the orthogonal complement, which is a closed subspace of the full space and thus has an innerProductSpace instance. AI usage: Didn't understand how to properly apply `quotient_norm_mk_eq K.toAddSubgroup x`. Claude suggested using convert. Otherwise no AI used, aside from acting as secondary Loogle. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-analysis new-contributor delegated 59/0 Mathlib/Analysis/InnerProductSpace/ProdL2.lean 1 39 ['TJHeeringa', 'github-actions', 'j-loreaux', 'mathlib-bors', 'themathqueen', 'wwylele'] j-loreaux
assignee:j-loreaux
3-18741
3 days ago
3-18741
3 days ago
14-47986
14 days
39529 lecopivo
author:lecopivo
 feat: tactic `apply_rulesets` `apply_rulesets` is just like `apply_rules` but allows to create rule sets, ruleprocs (similar to simprocs), handles metavariables in the goal and couple of other nifty features --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-meta 1953/0 Mathlib/Tactic.lean,Mathlib/Tactic/ApplyRuleSets.lean,Mathlib/Tactic/ApplyRuleSets/Attr.lean,Mathlib/Tactic/ApplyRuleSets/Core.lean,Mathlib/Tactic/ApplyRuleSets/Elab.lean,Mathlib/Tactic/ApplyRuleSets/RuleProc.lean,Mathlib/Tactic/ApplyRuleSets/Types.lean,MathlibTest/ApplyRuleSetsAttr.lean,MathlibTest/ApplyRuleSetsRegister.lean,MathlibTest/ApplyRuleSetsRingExpr.lean,MathlibTest/apply_rulesets.lean 11 2 ['github-actions', 'mathlib-bors'] nobody
3-18444
3 days ago
4-30631
4 days ago
0-8
8 seconds
33786 hdmkindom
author:hdmkindom
 feat(Analysis/Matrix): add Jacobian matrix for matrix-valued functions This PR introduces the Jacobian matrix for matrix-valued functions `F : Matrix m n 𝕜 → Matrix p q 𝕜`. The Jacobian matrix `jacobianMatrix F X` at point `X` is indexed by `(p × q) × (m × n)`, where each entry represents the partial derivative with respect to a basis element. To handle instance-mismatch issues with matrix norms, we use local Frobenius norm instances. This PR adds the new file: 'Analysis/Matrix/Jacobian.lean' ## Main definitions - `jacobianMatrix F X`: The Jacobian matrix at point `X`, defined by `jacobianMatrix F X (i, k) (j, l) = (fderiv ℝ F X (Matrix.single j l 1)) i k` ## Main theorems - `fderiv_eq_jacobian_mul`: Express the Fréchet derivative as a contraction with the Jacobian - `jacobianMatrix_comp`: Chain rule for Jacobian matrices - `jacobianMatrix_linear`, `jacobianMatrix_id`, `jacobianMatrix_const`: Basic properties - `jacobianMatrix_add`, `jacobianMatrix_smul`: Linearity properties t-analysis new-contributor awaiting-author 174/0 Mathlib.lean,Mathlib/Analysis/Matrix/Jacobian.lean 2 21 ['erdOne', 'github-actions', 'hdmkindom', 'jcommelin'] sgouezel
assignee:sgouezel
3-18146
3 days ago
94-24588
94 days ago
39-35999
39 days
39585 chrisflav
author:chrisflav
 chore(RingTheory): add `rfl` lemmas for `Ideal.quotientInfRingEquivPiQuotient` From Pi1. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-ring-theory 11/0 Mathlib/RingTheory/Ideal/Quotient/Operations.lean 1 1 ['github-actions'] nobody
3-18083
3 days ago
3-18166
3 days ago
3-17877
3 days
39494 Hagb
author:Hagb
 chore(Data/Finsupp/MonomialOrder): rename fields of `MonomialOrder` to match naming conventions Moves: - MonomialOrder.acm -> MonomialOrder.addCommMonoid_syn - MonomialOrder.lo -> MonomialOrder.linearOrder_syn - MonomialOrder.iocam -> MonomialOrder.isOrderedCancelAddMonoid_syn - MonomialOrder.wf -> MonomialOrder.wellFoundedLT_syn --- See https://github.com/leanprover-community/mathlib4/pull/32829#discussion_r2716534558. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-ring-theory 15/6 Mathlib/Data/Finsupp/MonomialOrder.lean,Mathlib/RingTheory/MvPolynomial/Groebner.lean 2 1 ['github-actions'] nobody
3-15155
3 days ago
5-66845
5 days ago
5-67083
5 days
38584 TJHeeringa
author:TJHeeringa
 feat(Analysis/InnerProductSpace/Reproducing): Add outerKernel, mem_iff --- Adds the `outerKernel` definition and the theorem `mem_iff`. These are needed for proving statements involving embeddings of RKHS. I can split `mem_of_posSemidef` and `mem_iff` off into a different pull request if that is preferred. The theorems `mem_of_posSemidef` and `posSemidef_of_mem` are the two directions of `mem_iff`. `posSemidef_of_mem` is slightly stronger than the converse direction of `mem_iff` in the sense that it also specifies the constant `c` in the statement. The specified `c` is in fact the smallest possible `c` for which the statement holds. The statement `mem_of_posSemidef` proves `∃ (g : H), (g : X → V) = f`. We could instead write `f ∈ (coeCLM 𝕜 (H:=H)).range`. Making this change would require the addition of the line `simp only [LinearMap.mem_range, coe_coe, coeCLM_apply]` in the beginning of the proof. The full beginning is then ``` lemma mem_of_posSemidef (f : X → V) {c : ℝ} (hc : ((c : 𝕜) ^ 2 • kernel H - outerKernel 𝕜 f).PosSemidef) : f ∈ (coeCLM 𝕜 (H:=H)).range := by simp only [LinearMap.mem_range, coe_coe, coeCLM_apply] let Laux : ... ``` Making a `MemRKHS` like MemLp and MemSobolev and then writing `MemRKHS H f` is also an option. Happy to change it to whatever is preferred. The proof of `mem_of_posSemidef` is based on the idea that any function f in the RKHS satisfies `=\sum_{n} ` for `x_n\in X` and `v_n\in V` by the reproducing property. We define the operator L(\sum_n K(\cdot,x_n)v_n) = \sum_{n} . This is bounded by the condition based on the kernels, and thus extends to a bounded linear operator on the RKHS. Its Riesz' representer agrees pointwise with f. AI: When asking how to avoid Classical.choose in constructing the operator L, Claude suggested the approach of going through the quotient. I made the proof using Claude as supplementary Loogle. Afterwards, I asked it to help shorted the proofs. Some suggestions for `mem_of_posSemidef` were applied. The other suggestions were not helping or not correct. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-analysis new-contributor awaiting-author 122/1 Mathlib/Analysis/InnerProductSpace/Reproducing.lean 1 12 ['TJHeeringa', 'github-actions', 'j-loreaux', 'themathqueen'] j-loreaux
assignee:j-loreaux
3-14782
3 days ago
3-14782
3 days ago
22-2608
22 days
39533 b-mehta
author:b-mehta
 feat(Data/Finset/Image): add image_comp and image_comp_image The statement `image_comp` is worth adding because it matches the Set version, and also is more useful for rewriting in the forward direction. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-data awaiting-author 8/0 Mathlib/Data/Finset/Image.lean 1 3 ['github-actions', 'j-loreaux', 'themathqueen'] nobody
3-13833
3 days ago
3-13833
3 days ago
1-6137
1 day
39427 Hagb
author:Hagb
 feat(Order/Interval/Finset/Defs): `LocallyFiniteOrder{Bot,Top}` implies `WellFounded{LT,GT}` --- - [ ] depends on: #39547 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-order blocked-by-other-PR 22/25 Mathlib/Order/Interval/Finset/Defs.lean,Mathlib/Order/Preorder/Finite.lean 2 5 ['Hagb', 'github-actions', 'leanprover-radar', 'mathlib-dependent-issues'] nobody
3-12409
3 days ago
3-12410
3 days ago
0-4027
1 hour
36888 CoolRmal
author:CoolRmal
 feat: generalize some lemmas by using conditional Jensen This PR includes two possible ways of generalizing `integral_abs_condExp_le`: 1. Replace absolute values with norms. 2. Consider absolute values defined on a lattice with a solid norm. We also prove that if a function is in Lp then its conditional expectation is also in Lp. In order to prove these results, some of the lemmas about essSup are generalized to conditionally complete lattices. Created with the help of Codex. --- - [x] depends on: #36877 - [x] depends on: #39104 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-measure-probability awaiting-author 215/127 Mathlib/MeasureTheory/Function/ConditionalExpectation/Basic.lean,Mathlib/MeasureTheory/Function/ConditionalExpectation/CondJensen.lean,Mathlib/MeasureTheory/Function/ConditionalExpectation/Real.lean,Mathlib/Probability/CondVar.lean,Mathlib/Probability/Martingale/BorelCantelli.lean,Mathlib/Probability/Martingale/Centering.lean 6 23 ['CoolRmal', 'EtienneC30', 'RemyDegenne', 'github-actions', 'mathlib-dependent-issues', 'mathlib-merge-conflicts'] EtienneC30
assignee:EtienneC30
3-11322
3 days ago
4-49905
4 days ago
6-24577
6 days
39588 jvanwinden
author:jvanwinden
 feat(MeasureTheory/Measure/ProbabilityMeasure): add toProbabilityMeasure and basic API Introduces `Measure.toProbabilityMeasure`, which converts a `Measure` into a `ProbabilityMeasure` in the presence of the typeclass assumption `[IsProbabilityMeasure]`. Some basic API is added for the interaction between `toProbabilityMeasure` and the coercion from `ProbabilityMeasure` to `Measure`. The main convenience is that the new method allows for dot notation on `Measure`. This PR arose from the following situation: I needed to prove equality of two `Measure` objects, and I wanted to do this by using uniqueness of limits. But the topology of weak convergence is only defined on `ProbabilityMeasure` and not on `Measure`. With the new lemma `toProbabilityMeasure_inj`, an equality of measures can easily be rewritten into an equality of the corresponding probability measures, after which `tendsto_nhds_unique` can be applied. Aside from this, `toProbabilityMeasure` has the potential to simplify theorem statements about `Measure` objects which use the topology of weak convergence either in the assumptions or the conclusion. For example, now one can simply write `Tendsto μ.toProbabilityMeasure f (nhds μ_lim.toProbabilityMeasure)` when appropriate `[IsProbabilityMeasure]` assumptions are present. This PR is intended as a starting point for a discussion. I only added some basic API, but perhaps more lemmas should be added (which ones?). Also, a similar definition could be made for `FiniteMeasure`. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-measure-probability 19/2 Mathlib/MeasureTheory/Measure/ProbabilityMeasure.lean 1 1 ['github-actions'] nobody
3-10279
3 days ago
3-10368
3 days ago
3-10079
3 days
39383 fpvandoorn
author:fpvandoorn
 fix: use notation3 more * `notation3` is better at generating delaborators in the presence of implicit arguments, other notation and some other complications. * I explicitly tested that each change was not correctly pretty-printed before, but now is. * Add spaces around the global notation `^+` (that maybe shouldn't be global at all?) --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) delegated 21/21 Mathlib/Algebra/Ring/Action/Submonoid.lean,Mathlib/Analysis/RCLike/Inner.lean,Mathlib/Data/Sum/Order.lean,Mathlib/LinearAlgebra/AffineSpace/AffineSubspace/Defs.lean,Mathlib/MeasureTheory/Function/SimpleFuncDenseLp.lean,Mathlib/MeasureTheory/Integral/Marginal.lean,Mathlib/MeasureTheory/OuterMeasure/AE.lean,Mathlib/Order/InitialSeg.lean,Mathlib/Topology/Algebra/Module/Multilinear/Basic.lean,Mathlib/Topology/Algebra/Module/Spaces/UniformConvergenceCLM.lean 10 4 ['github-actions', 'j-loreaux', 'mathlib-bors'] nobody
3-8816
3 days ago
3-8816
3 days ago
5-8227
5 days
39591 plp127
author:plp127
 feat: `Equiv.symm_trans` Add theorem `Equiv.symm_trans`, which says `(f.trans g).symm = g.symm.trans f.symm`. See [Zulip](https://leanprover.zulipchat.com/#narrow/channel/217875-Is-there-code-for-X.3F/topic/.60Equiv.2Esymm_trans.60/near/596266434). --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) easy t-logic 2/0 Mathlib/Logic/Equiv/Defs.lean 1 1 ['github-actions'] nobody
3-7407
3 days ago
3-7502
3 days ago
3-7213
3 days
38778 felixpernegger
author:felixpernegger
 feat(Topology/EMetricSpace): instances of weak extended metric spaces Continuation of #38105. In particular, this makes `ENNReal` and `EReal` weak extended metric spaces. After this PR one can probably generalise various results/definition which use `(Pseudo)EMetricSpace` to use `Weak(Pseudo)EMetricSpace` (so that they in particular also hold for `ENNReal` and `EReal`) t-topology awaiting-author 247/0 Mathlib.lean,Mathlib/Topology/EMetricSpace/Weak.lean 2 2 ['github-actions', 'j-loreaux'] PatrickMassot
assignee:PatrickMassot
3-3819
3 days ago
3-3819
3 days ago
14-70133
14 days
37984 loefflerd
author:loefflerd
 feat: abstract theory of measures General foundations of non-archimedean measure theory (intended for applications to Iwasawa algebras) --- - [x] depends on: #38701 t-topology awaiting-author 458/0 Mathlib.lean,Mathlib/NumberTheory/Padics/Measure/Basic.lean,Mathlib/NumberTheory/Padics/Measure/Group.lean,Mathlib/NumberTheory/Padics/Measure/Topology.lean 4 7 ['github-actions', 'j-loreaux', 'mathlib-dependent-issues'] PatrickMassot
assignee:PatrickMassot
3-2983
3 days ago
3-2983
3 days ago
15-819
15 days
37295 wwylele
author:wwylele
 feat(Analysis/InnerProductSpace): generalized determinant of a rectangle matrix / linear map This is the volume factor of a linear map --- I have encountered the expression `sqrt(det(T' * T))` a few times in various places but it doesn't look like it has a standard name and entry in mathlib, so this adds it. Zulip thread [#Is there code for X? > (norm of) "determinant" of map between inner product spaces](https://leanprover.zulipchat.com/#narrow/channel/217875-Is-there-code-for-X.3F/topic/.28norm.20of.29.20.22determinant.22.20of.20map.20between.20inner.20product.20spaces/with/581776873) One motivation to define this is to state volume formula under transformations. From *Measure theory and fine properties of functions*: - Lemma 3.1: for linear map $L : \mathbb{R}^n \to \mathbb{R}^m$, we have $\mathcal{H}^n(L(A)) = [ L ] \mathcal{L}^n(A)$. This is proved in this PR at `euclideanHausdorffMeasure_image_eq_normDet_mul_volume` - Theorem 3.8, for (not necessarily linear) $f : \mathbb{R}^n \to \mathbb{R}^m$ ($n \le m$) and $\mathcal{L}^n$-measurable set $A \subset \mathbb{R}^n$, we have $\int_A J f dx = \int_{\mathbb{R}^m} \mathcal{H}^0(A \cap f\^{-1}\{y\}) d\mathcal{H}^n(y)$, where $J f$ is the `normDet` of the rectangular Jacobian matrix AI usage disclosure: AI was used in the following parts - searching for related literature for an appropriate name - generate draft proofs for some lemma to verify their correctness, though the final code has been completely rewritten by me. - [ ] depends on: #37918 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-analysis maintainer-merge 480/0 Mathlib.lean,Mathlib/Analysis/InnerProductSpace/Adjoint.lean,Mathlib/Analysis/InnerProductSpace/NormDet.lean,docs/references.bib 4 19 ['copilot-pull-request-reviewer', 'github-actions', 'j-loreaux', 'mathlib-dependent-issues', 'themathqueen', 'wwylele'] faenuccio and j-loreaux
assignee:j-loreaux assignee:faenuccio
3-2783
3 days ago
18-11265
18 days ago
51-85538
51 days
39596 grunweg
author:grunweg
 feat: experimental hack to allow by finiteness auto-params This provides a way to apply `by finiteness` auto-parameters in simp lemmas. (Making simp run dischargers natively requires unfortunate hacks... so is not easily doable.) Another alternative: make a simproc to run auto-params in general. This might be even better. Written at the Mathlib Initiative Retreat. Thanks to Joachim Breitner and Henrik Böving for the help writing this! --- The hack is calling `runTactic`: if `finiteness` (and, hence, `aesop`) could be called from an appropriate meta function instead, we could make the implementation more robust. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) WIP t-data 52/3 Mathlib/Data/ENNReal/Basic.lean 1 2 ['github-actions', 'grunweg'] nobody
3-1313
3 days ago
3-4471
3 days ago
0-1
1 second
39597 grunweg
author:grunweg
 Don't look up! --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-differential-geometry WIP 4849/69 Mathlib.lean,Mathlib/Geometry/Manifold/CheatSheet.md,Mathlib/Geometry/Manifold/MFDeriv/NormedSpace.lean,Mathlib/Geometry/Manifold/MFDeriv/SpecificFunctions.lean,Mathlib/Geometry/Manifold/Riemannian/ExistsRiemannianMetric.lean,Mathlib/Geometry/Manifold/VectorBundle/Basic.lean,Mathlib/Geometry/Manifold/VectorBundle/ContMDiffSection.lean,Mathlib/Geometry/Manifold/VectorBundle/CovariantDerivative/Basic.lean,Mathlib/Geometry/Manifold/VectorBundle/CovariantDerivative/ChristoffelSymbols.lean,Mathlib/Geometry/Manifold/VectorBundle/CovariantDerivative/Curvature.lean,Mathlib/Geometry/Manifold/VectorBundle/CovariantDerivative/Ehresmann.lean,Mathlib/Geometry/Manifold/VectorBundle/CovariantDerivative/Geodesics.lean,Mathlib/Geometry/Manifold/VectorBundle/CovariantDerivative/IntegralCurvePrelim.lean,Mathlib/Geometry/Manifold/VectorBundle/CovariantDerivative/LeviCivita.lean,Mathlib/Geometry/Manifold/VectorBundle/CovariantDerivative/Lift.lean,Mathlib/Geometry/Manifold/VectorBundle/CovariantDerivative/Metric.lean,Mathlib/Geometry/Manifold/VectorBundle/CovariantDerivative/Prelim.lean,Mathlib/Geometry/Manifold/VectorBundle/CovariantDerivative/Torsion2.lean,Mathlib/Geometry/Manifold/VectorBundle/CovariantDerivative/TrivPrelim.lean,Mathlib/Geometry/Manifold/VectorBundle/CovariantDerivative/Trivial.lean,Mathlib/Geometry/Manifold/VectorBundle/GramSchmidtOrtho.lean,Mathlib/Geometry/Manifold/VectorBundle/Hom.lean,Mathlib/Geometry/Manifold/VectorBundle/LocalFrame.lean,Mathlib/Geometry/Manifold/VectorBundle/MDifferentiable.lean,Mathlib/Geometry/Manifold/VectorBundle/OrthonormalFrame.lean,Mathlib/Geometry/Manifold/VectorBundle/Tensoriality.lean,Mathlib/Geometry/Manifold/VectorBundle/Unused.lean,Mathlib/Geometry/Manifold/VectorField/LieBracket.lean 28 1 ['github-actions'] nobody
3-1182
3 days ago
3-3443
3 days ago
0-51
51 seconds
39337 grunweg
author:grunweg
 chore: de-continuity --- - [x] depends on: #39343 - [x] depends on: #39358 - [x] depends on: #39359 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-topology 40/10 Mathlib/AlgebraicTopology/SimplicialSet/TopAdj.lean,Mathlib/Analysis/Convex/StdSimplex.lean,Mathlib/Condensed/Light/TopCatAdjunction.lean,Mathlib/Condensed/TopCatAdjunction.lean,Mathlib/Topology/Algebra/MvPolynomial.lean,Mathlib/Topology/Algebra/SeparationQuotient/Section.lean,Mathlib/Topology/Category/TopCat/Limits/Products.lean,Mathlib/Topology/Compactness/CompactlyGeneratedSpace.lean,Mathlib/Topology/ContinuousMap/Basic.lean 9 5 ['github-actions', 'grunweg', 'mathlib-dependent-issues', 'mathlib-merge-conflicts', 'mathlib-splicebot'] nobody
3-1171
3 days ago
2-86319
2 days ago
0-33596
9 hours
39431 gasparattila
author:gasparattila
 feat: homogenization of an affine space (computable version) --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra
label:t-algebra$
 615/0 Mathlib.lean,Mathlib/LinearAlgebra/AffineSpace/Homogenization.lean,docs/references.bib 3 2 ['eric-wieser', 'github-actions'] nobody
3-1144
3 days ago
unknown
0-0
0 seconds
36963 seewoo5
author:seewoo5
 feat(ModularForms): SL2 action and Serre derivative --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) Equivariance of Serre derivative under SL2 action. More precisely, $$\partial_k (F|_k \gamma) = (\partial_{k} F)|_{k+2} \gamma$$. From [Sphere Packing Project](https://github.com/thefundamentaltheor3m/Sphere-Packing-Lean). t-number-theory large-import 163/30 Mathlib/Analysis/Complex/UpperHalfPlane/Manifold.lean,Mathlib/Analysis/Complex/UpperHalfPlane/MoebiusAction.lean,Mathlib/NumberTheory/ModularForms/Derivative.lean 3 11 ['github-actions', 'loefflerd', 'seewoo5', 'tb65536', 'wwylele'] tb65536
assignee:tb65536
2-85992
2 days ago
2-85992
2 days ago
25-10422
25 days
25822 ScottCarnahan
author:ScottCarnahan
 WIP: experiments with vertex algebras This is a testbed for various attempts at things. Please don't bother reviewing. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) --- *This PR continues the work from #25821.* *Original PR: https://github.com/leanprover-community/mathlib4/pull/25821* WIP large-import merge-conflict 8547/266 Mathlib.lean,Mathlib/Algebra/DirectSum/Basic.lean,Mathlib/Algebra/Group/Basic.lean,Mathlib/Algebra/Lie/Basic.lean,Mathlib/Algebra/Lie/ChevalleyEilenberg.lean,Mathlib/Algebra/Lie/Cochain.lean,Mathlib/Algebra/Lie/Cocycle.lean,Mathlib/Algebra/Lie/Extension.lean,Mathlib/Algebra/Lie/Extension/CentralExtension.lean,Mathlib/Algebra/Lie/Graded.lean,Mathlib/Algebra/Lie/Loop.lean,Mathlib/Algebra/Module/Equiv/Basic.lean,Mathlib/Algebra/Module/Equiv/Defs.lean,Mathlib/Algebra/MonoidAlgebra/PointwiseSMul.lean,Mathlib/Algebra/Order/AddTorsor.lean,Mathlib/Algebra/Order/Monoid/Prod.lean,Mathlib/Algebra/Polynomial/Laurent.lean,Mathlib/Algebra/Polynomial/Nusmeval.lean,Mathlib/Algebra/Polynomial/Smeval.lean,Mathlib/Algebra/Ring/NegOnePow.lean,Mathlib/Algebra/Vertex/Affine.lean,Mathlib/Algebra/Vertex/Basic.lean,Mathlib/Algebra/Vertex/Defs.lean,Mathlib/Algebra/Vertex/HVertexOperator.lean,Mathlib/Algebra/Vertex/Lattice.lean,Mathlib/Algebra/Vertex/VertexOperator.lean,Mathlib/Data/Finset/SMulAntidiagonal.lean,Mathlib/Data/FunLike/Equiv.lean,Mathlib/Data/Prod/RevLex.lean,Mathlib/Data/Set/SMulAntidiagonal.lean,Mathlib/GroupTheory/GroupAction/Equiv.lean,Mathlib/GroupTheory/GroupAction/Hom.lean,Mathlib/RingTheory/Binomial.lean,Mathlib/RingTheory/DividedPowers/Cauchy.lean,Mathlib/RingTheory/FormalSeries.lean,Mathlib/RingTheory/HahnSeries/Addition.lean,Mathlib/RingTheory/HahnSeries/Basic.lean,Mathlib/RingTheory/HahnSeries/Binomial.lean,Mathlib/RingTheory/HahnSeries/HEval.lean,Mathlib/RingTheory/HahnSeries/Multiplication.lean,Mathlib/RingTheory/HahnSeries/PowerSeries.lean,Mathlib/RingTheory/HahnSeries/Summable.lean,Mathlib/RingTheory/LaurentSeries.lean,Mathlib/RingTheory/PowerSeries/Binomial.lean 44 33 ['github-actions', 'leanprover-community-bot-assistant', 'mathlib-merge-conflicts', 'mathlib4-merge-conflict-bot'] nobody
2-84349
2 days ago
344-13995
344 days ago
0-2
2 seconds
39560 b-mehta
author:b-mehta
 feat(Order/Filter/AtTopBot/Finset): relate atTop on Finset with Finset.card --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-order delegated 54/0 Mathlib/Order/Filter/AtTopBot/Finset.lean 1 7 ['SnirBroshi', 'github-actions', 'j-loreaux', 'mathlib-bors'] nobody
2-83751
2 days ago
2-83751
2 days ago
0-80958
22 hours
39477 wwylele
author:wwylele
 chore(LinearAlgebra/Ray): remove a defeq abuse Previously, the code uses Subtype constructor to construct RayVector, and the instance cannot see through this. As a common practice, RayVector declares its own constructor to resolve this --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra tech debt maintainer-merge
label:t-algebra$
 16/5 Mathlib/LinearAlgebra/Ray.lean 1 9 ['Vierkantor', 'github-actions', 'j-loreaux', 'robin-carlier', 'wwylele'] nobody
2-79133
2 days ago
2-79202
2 days ago
5-48255
5 days
39579 hawkrobe
author:hawkrobe
 feat(RingTheory/HopfAlgebra): Hopf algebra structure on SymmetricAlgebra Adds Hopf algebra structure on SymmetricAlgebra. --- - [ ] depends on: #39483 t-ring-theory new-contributor blocked-by-other-PR 121/0 Mathlib.lean,Mathlib/LinearAlgebra/SymmetricAlgebra/Basic.lean,Mathlib/RingTheory/Bialgebra/SymmetricAlgebra.lean,Mathlib/RingTheory/HopfAlgebra/SymmetricAlgebra.lean 4 3 ['github-actions', 'mathlib-dependent-issues'] nobody
2-75133
2 days ago
3-26416
3 days ago
0-1333
22 minutes
34361 grunweg
author:grunweg
 chore: rename comp' to fun_comp a few more times; use to_fun to autog… …enerate -------- - [x] depends on: #34257 (then this PR can be done the proper way) --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-analysis 19/42 Mathlib/Analysis/Analytic/Composition.lean,Mathlib/Analysis/Calculus/DifferentialForm/Basic.lean,Mathlib/Analysis/Calculus/FDeriv/Comp.lean,Mathlib/Analysis/Calculus/VectorField.lean,Mathlib/Analysis/Meromorphic/Basic.lean 5 10 ['JovanGerb', 'github-actions', 'grunweg', 'mathlib-dependent-issues'] j-loreaux
assignee:j-loreaux
2-74254
2 days ago
3-2132
3 days ago
3-47309
3 days
34713 dennj
author:dennj
 feat(Probability/Markov): stationary distributions for stochastic matrices This PR proves that every row-stochastic matrix on a finite nonempty state space has a stationary distribution in the standard simplex. Main additions to `Mathlib/Probability/Markov/Stationary.lean`: - `IsStationary`: A distribution μ is stationary for matrix P if μ ᵥ* P = μ - `cesaroAverage`: Cesàro average of iterates of a vector under a matrix - `Matrix.rowStochastic.exists_stationary_distribution`: existence theorem The proof uses Cesàro averaging: start with uniform distribution, form averages, extract convergent subsequence by compactness, show limit is stationary via L¹ non-expansiveness. Also adds `vecMul_mem_stdSimplex` to `Stochastic.lean`: multiplying a probability vector by a row-stochastic matrix preserves simplex membership. This is human-made PR with AI help in golfing proof and documenting the code. new-contributor t-measure-probability 166/0 Mathlib.lean,Mathlib/LinearAlgebra/Matrix/Stochastic.lean,Mathlib/Probability/Markov/Stationary.lean 3 17 ['EtienneC30', 'dennj', 'dupuisf', 'github-actions', 'grunweg', 'j-loreaux', 'mathlib-merge-conflicts', 'riccardobrasca'] kex-y
assignee:kex-y
2-74253
2 days ago
25-82707
25 days ago
36-29031
36 days
35619 SnirBroshi
author:SnirBroshi
 feat(Combinatorics/SimpleGraph/Clique): intersection and union of cliques Plus a couple of lemmas. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-combinatorics maintainer-merge 45/14 Mathlib/Combinatorics/SimpleGraph/Clique.lean,Mathlib/Combinatorics/SimpleGraph/Coloring/VertexColoring.lean,Mathlib/Data/Set/Pairwise/Basic.lean 3 13 ['SnirBroshi', 'YaelDillies', 'github-actions'] b-mehta
assignee:b-mehta
2-74252
2 days ago
29-17142
29 days ago
50-79278
50 days
38014 cduenasnavarro
author:cduenasnavarro
 feat(InformationTheory): linear codes over finite fields and minimum distance properties Define linear codes over a finite field `F` as finite-dimensional subspaces of `Fin n → F`, together with their minimum Hamming distance. Main definitions: * `LinearCode` * `minDist` * `LinearCodeWithDist` * `hammingSphere` Main results: * `minDist_eq_sInf_pairwiseDist`: characterisation of the minimum distance via pairwise distances * `disjoint_spheres`: Hamming spheres of radius `t` around distinct codewords are disjoint if `2 * t < d` Pending: * Choosing an adequate book reference --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-measure-probability new-contributor 181/0 Mathlib.lean,Mathlib/InformationTheory/Coding/LinearCode.lean 2 37 ['cduenasnavarro', 'github-actions', 'linesthatinterlace', 'rkirov', 'vihdzp', 'wwylele'] kex-y
assignee:kex-y
2-74249
2 days ago
39-7330
39 days ago
39-7804
39 days
38055 felixpernegger
author:felixpernegger
 feat(Topology/EMetricSpace): add r-variation Redoing #37007 (I had accidently deleted my fork which nuked the PR). See https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/p-variation for discussion. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-topology t-analysis 408/0 Mathlib.lean,Mathlib/Topology/EMetricSpace/RVariation.lean 2 2 ['felixpernegger', 'github-actions'] urkud
assignee:urkud
2-74248
2 days ago
36-46367
36 days ago
36-46472
36 days
38716 YaelDillies
author:YaelDillies
 feat(Algebra/Order): `NNRat.cast_sub` From AddCombi --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra large-import
label:t-algebra$
 29/22 Mathlib/Algebra/Order/Field/Rat.lean,Mathlib/Algebra/Order/Ring/Rat.lean,Mathlib/Combinatorics/SetFamily/LYM.lean,Mathlib/Data/Finset/Density.lean,Mathlib/Data/NNRat/Defs.lean,Mathlib/Data/NNRat/Floor.lean,Mathlib/Data/NNRat/Order.lean,Mathlib/Data/Rat/Star.lean,Mathlib/RingTheory/Binomial.lean,Mathlib/Topology/Instances/Rat.lean 10 1 ['github-actions'] themathqueen
assignee:themathqueen
2-74247
2 days ago
21-54102
21 days ago
21-58196
21 days
38974 Brian-Nugent
author:Brian-Nugent
 chore: fix documentation of `LocallyQuasiFinite` --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebraic-geometry easy 6/5 Mathlib/AlgebraicGeometry/Morphisms/QuasiFinite.lean 1 1 ['github-actions'] alreadydone
assignee:alreadydone
2-74246
2 days ago
17-519
17 days ago
17-230
17 days
39172 yuanyi-350
author:yuanyi-350
 refactor(MeasureTheory): golf `Mathlib/MeasureTheory/Function/StronglyMeasurable/Basic` - refactors `Mathlib/MeasureTheory/Function/StronglyMeasurable/Basic` by simplifying `stronglyMeasurable_in_set` and `stronglyMeasurable_of_measurableSpace_le_on` Extracted from #38104 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) codex LLM-generated t-measure-probability 16/42 Mathlib/MeasureTheory/Function/StronglyMeasurable/Basic.lean 1 2 ['github-actions', 'yuanyi-350'] kex-y
assignee:kex-y
2-74244
2 days ago
11-49674
11 days ago
11-49385
11 days
39384 EngelsVon
author:EngelsVon
 feat(Analysis/Calculus/DifferentialForm): Stokes' theorem on rectangular boxes ## Summary This PR proves the generalized Stokes theorem for differential forms on rectangular boxes $[a, b] \subset \mathbb{R}^{m+1}$. The proof strategy is: 1. Extract the `i`-th signed face component `boxFaceComponent ω i` from an `m`-form `ω` — a scalar function whose divergence equals the top-form density of the exterior derivative `dω`. 2. Apply Mathlib's existing divergence theorem for boxes (`integral_divergence_of_hasFDerivAt_off_countable'`). This gives a genuine proved Stokes formula in the Euclidean setting, complementing the existing infrastructure for differential forms. ## Main definitions - `DifferentialForm.topFormDensity`: density function of a top-form field - `DifferentialForm.boxFaceComponent`: the `i`-th signed face component of an `m`-form on `ℝ^(m+1)` - `DifferentialForm.boxBoundaryIntegral`: the signed boundary integral over `∂[a,b]` ## Main results - `box_stokes_of_hasFDerivAt`: Stokes' theorem on boxes with pointwise differentiability hypotheses - `box_stokes_of_contDiff`: a convenient `C¹` formulation t-analysis new-contributor 314/0 Mathlib.lean,Mathlib/Analysis/Calculus/DifferentialForm/BoxStokes.lean 2 2 ['github-actions'] j-loreaux
assignee:j-loreaux
2-74240
2 days ago
8-14905
8 days ago
8-14616
8 days
39389 i-love-lean
author:i-love-lean
 feat(Analysis/SpecialFunctions): homeomorphism for spherical coordinates A few months ago, I noticed that mathlib was missing change of variables to spherical coordinates, which is taught in undergraduate calculus and useful for many 3D integrals. So far, I used `PolarCoord.lean` as reference and implemented a similar homeomorphism for spherical coordinates. There's still a lot of work left to prove an analog of `integral_comp_polarCoord_symm` but for spherical coordinates, so I'm splitting up the work into several PRs. I also fixed a typo in `PolarCoord.lean`. t-analysis new-contributor 133/2 Mathlib.lean,Mathlib/Analysis/SpecialFunctions/Complex/Arg.lean,Mathlib/Analysis/SpecialFunctions/PolarCoord.lean,Mathlib/Analysis/SpecialFunctions/SphericalCoord.lean 4 4 ['github-actions', 'i-love-lean', 'wwylele'] j-loreaux
assignee:j-loreaux
2-74239
2 days ago
8-6040
8 days ago
8-6571
8 days
39406 roos-j
author:roos-j
 feat(Analysis): van der Corput's lemma Adds van der Corput's lemma on one-dimensional oscillatory integrals, a standard tool in harmonic analysis. Co-authored-by: Manasa Praveen --- From https://github.com/roos-j/lean-oscillatory, see there for future plans Zulip discussion [#mathlib4 > Oscillatory integrals in Lean](https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/Oscillatory.20integrals.20in.20Lean/with/584786060) AI disclosure: The code in this PR was predominantly human-written. gpt-5.5 has helped in the later stages with shortening proofs, golfing and general advice. t-analysis new-contributor 551/0 Mathlib.lean,Mathlib/Analysis/OscillatoryIntegrals/VanDerCorput.lean 2 2 ['github-actions'] j-loreaux
assignee:j-loreaux
2-74237
2 days ago
7-51899
7 days ago
7-52674
7 days
39441 Paul-Lez
author:Paul-Lez
 feat: small lemma about multilinear power series I'm currently working on a PR that connects the `PowerSeries` API to the `FormalMultilinearSeries` API, and in particular constructs a map from `PowerSeries A` to `FormalMultilinearSeries R A A` for any `R`-algebra `A`. This lemma was useful for proving that this map respects composition. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-analysis 7/0 Mathlib/Analysis/Analytic/Composition.lean 1 3 ['Paul-Lez', 'github-actions', 'grunweg'] j-loreaux
assignee:j-loreaux
2-74236
2 days ago
6-85364
6 days ago
6-85075
6 days
39452 Deicyde
author:Deicyde
 chore: Move `UnitAddTorus` to Topology/Instances/AddCircle/Real.lean Previous location of `UnitAddTorus` in Analysis/Fourier/AddCircleMulti.lean was ad-hoc and required users to import the entire Fourier analysis infrastructure just to use the torus. I suggest moving it to it's natural home beside `UnitAddCircle`. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-topology new-contributor 3/3 Mathlib/Analysis/Fourier/AddCircleMulti.lean,Mathlib/Topology/Instances/AddCircle/Real.lean 2 3 ['github-actions'] PatrickMassot
assignee:PatrickMassot
2-74235
2 days ago
6-74960
6 days ago
6-74671
6 days
39454 SnirBroshi
author:SnirBroshi
 feat(Analysis/Convex/Jensen): more forms of Jensen's strict inequality Adds iff theorems for Jensen's strict inequality for `<`/`=`, positive/nonnegative weights, and canonical form versions. --- Note that as established by existing theorems in the file, "canonical" here refers to comparing terms to the center of mass instead of to each other. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-analysis 95/13 Mathlib/Analysis/Convex/Jensen.lean 1 1 ['github-actions'] j-loreaux
assignee:j-loreaux
2-74234
2 days ago
6-73985
6 days ago
6-73696
6 days
39489 Paul-Lez
author:Paul-Lez
 fix: defeq abuse in HasFTaylorSeriesUpToOn.comp Removes a `set_option backward.isDefEq.respectTransparency false`. The fix isn't as nice as I would have hoped (I tried to make it smaller but to no avail). --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-analysis 5/2 Mathlib/Analysis/Calculus/ContDiff/FaaDiBruno.lean 1 1 ['github-actions'] j-loreaux
assignee:j-loreaux
2-74232
2 days ago
5-69982
5 days ago
5-69693
5 days
39601 SnirBroshi
author:SnirBroshi
 feat(LinearAlgebra/Matrix/Charpoly/Eigs): generalize to `CommRing`s Also adds `r ∈ spectrum R B ↔ ¬IsUnit (B.charpoly.eval r)` which is the ring version of `r ∈ spectrum K A ↔ A.charpoly.IsRoot r`. --- The `variable`s above define `A` over a `Field` and `B` over a `CommRing`, switching `A` to `B` generalizes. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra maintainer-merge
label:t-algebra$
 16/13 Mathlib/LinearAlgebra/Matrix/Charpoly/Eigs.lean 1 3 ['b-mehta', 'github-actions'] nobody
2-71658
2 days ago
2-77667
2 days ago
2-77378
2 days
34703 martinwintermath
author:martinwintermath
 Generalizing orthogonalBilin --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor merge-conflict 51/25 Mathlib/Analysis/InnerProductSpace/Orthogonal.lean,Mathlib/LinearAlgebra/QuadraticForm/Basic.lean,Mathlib/LinearAlgebra/SesquilinearForm/Basic.lean 3 2 ['github-actions', 'mathlib-merge-conflicts'] nobody
2-70704
2 days ago
unknown
0-0
0 seconds
36412 Timeroot
author:Timeroot
 refactor(Topology/Perfect): Change PerfectSpace to be a synonym for NeBot Refactor PerfectSpace to be, equivalently, just `forall (x : α) : Filter.NeBot (𝓝[≠] x)`. See [#mathlib4 > Changing PerfectSpace](https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/Changing.20PerfectSpace/with/575568102) for discussion This is unmodified output from @Aristotle-Harmonic ! [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) Co-authored-by: Aristotle (Harmonic) merge-conflict 54/50 Mathlib/Analysis/Normed/Field/Basic.lean,Mathlib/Analysis/Normed/Module/RCLike/Real.lean,Mathlib/Topology/Algebra/Module/Basic.lean,Mathlib/Topology/Algebra/Module/PerfectSpace.lean,Mathlib/Topology/Compactification/OnePoint/Basic.lean,Mathlib/Topology/Perfect.lean,Mathlib/Topology/Separation/Connected.lean 7 3 ['github-actions', 'mathlib-merge-conflicts'] nobody
2-70460
2 days ago
72-8073
72 days ago
0-1127
18 minutes
37963 martinwintermath
author:martinwintermath
 feat(LinearAlgebra/SesquilinearForm): moving orthogonality to own file and adding lemmas * Move `Submodule.orthogonalBilin` and all lemmas that use it from SesquilinearForm/Basic.lean to its own file SesquilinearForm/Orthogonal.lean. * Add the features proposed in #34007 to align with `PointedCone.dual`. --- - [ ] depends on: #37381 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) blocked-by-other-PR t-algebra merge-conflict
label:t-algebra$
 389/190 Mathlib.lean,Mathlib/Algebra/Lie/InvariantForm.lean,Mathlib/Algebra/Lie/TraceForm.lean,Mathlib/Algebra/Lie/Weights/Killing.lean,Mathlib/Analysis/InnerProductSpace/Orthogonal.lean,Mathlib/LinearAlgebra/BilinearForm/Orthogonal.lean,Mathlib/LinearAlgebra/QuadraticForm/Basic.lean,Mathlib/LinearAlgebra/QuadraticForm/IsometryEquiv.lean,Mathlib/LinearAlgebra/QuadraticForm/Radical.lean,Mathlib/LinearAlgebra/QuadraticForm/TensorProduct.lean,Mathlib/LinearAlgebra/QuadraticForm/TensorProduct/Isometries.lean,Mathlib/LinearAlgebra/RootSystem/Finite/Nondegenerate.lean,Mathlib/LinearAlgebra/SesquilinearForm/Basic.lean,Mathlib/LinearAlgebra/SesquilinearForm/Orthogonal.lean,docs/undergrad.yaml 15 3 ['github-actions', 'mathlib-dependent-issues', 'mathlib-merge-conflicts'] nobody
2-70216
2 days ago
39-83851
39 days ago
0-584
9 minutes
38663 vihdzp
author:vihdzp
 chore: deprecate duplicate theorems about `IsBotZeroClass` I'll probably split this into various PRs, for ease of review. --- - [x] depends on: #38148 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-order merge-conflict 210/270 Archive/Imo/Imo2024Q3.lean,Mathlib/Algebra/Lie/Solvable.lean,Mathlib/Algebra/Lie/Weights/Chain.lean,Mathlib/Algebra/Order/Floor/Extended.lean,Mathlib/Algebra/Order/GroupWithZero/Finset.lean,Mathlib/Algebra/Order/IsBotOne.lean,Mathlib/Algebra/Order/Monoid/Unbundled/Basic.lean,Mathlib/Algebra/Polynomial/Degree/TrailingDegree.lean,Mathlib/Algebra/Polynomial/HasseDeriv.lean,Mathlib/AlgebraicGeometry/EllipticCurve/Reduction.lean,Mathlib/AlgebraicGeometry/ProjectiveSpectrum/Proper.lean,Mathlib/AlgebraicTopology/AlternatingFaceMapComplex.lean,Mathlib/Analysis/Analytic/Basic.lean,Mathlib/Analysis/CStarAlgebra/Multiplier.lean,Mathlib/Analysis/CStarAlgebra/Spectrum.lean,Mathlib/Analysis/CStarAlgebra/Unitization.lean,Mathlib/Analysis/Calculus/ContDiff/Bounds.lean,Mathlib/Analysis/Complex/Basic.lean,Mathlib/Analysis/Distribution/TemperateGrowth.lean,Mathlib/Analysis/InnerProductSpace/Projection/FiniteDimensional.lean,Mathlib/Analysis/MeanInequalities.lean,Mathlib/Analysis/Normed/Operator/NNNorm.lean,Mathlib/Analysis/Normed/Unbundled/SpectralNorm.lean,Mathlib/Analysis/Real/Pi/Irrational.lean,Mathlib/Analysis/SpecialFunctions/ArithmeticGeometricMean.lean,Mathlib/Analysis/SpecificLimits/Basic.lean,Mathlib/Combinatorics/Enumerative/Composition.lean,Mathlib/Combinatorics/Enumerative/DyckWord.lean,Mathlib/Combinatorics/Extremal/RuzsaSzemeredi.lean,Mathlib/Combinatorics/SimpleGraph/Regularity/Equitabilise.lean,Mathlib/Combinatorics/SimpleGraph/VertexCover.lean,Mathlib/Computability/Primrec/Basic.lean,Mathlib/Data/ENNReal/Basic.lean,Mathlib/Data/Finset/Density.lean,Mathlib/Data/Int/WithZero.lean,Mathlib/Data/List/Shortlex.lean,Mathlib/Data/Nat/Nth.lean,Mathlib/Data/Nat/Totient.lean,Mathlib/Data/Rat/Cast/Order.lean,Mathlib/FieldTheory/Finite/Valuation.lean,Mathlib/FieldTheory/RatFunc/Valuation.lean,Mathlib/GroupTheory/ArchimedeanDensely.lean,Mathlib/GroupTheory/Coxeter/Basic.lean,Mathlib/GroupTheory/GroupAction/Blocks.lean,Mathlib/GroupTheory/SpecificGroups/Alternating/KleinFour.lean,Mathlib/LinearAlgebra/Dimension/Finite.lean,Mathlib/LinearAlgebra/Matrix/Transvection.lean,Mathlib/MeasureTheory/Covering/Vitali.lean,Mathlib/MeasureTheory/Function/ConditionalExpectation/Real.lean,Mathlib/MeasureTheory/Function/SimpleFuncDense.lean,Mathlib/MeasureTheory/Integral/Bochner/VitaliCaratheodory.lean,Mathlib/MeasureTheory/Integral/Lebesgue/Countable.lean,Mathlib/MeasureTheory/Measure/AbsolutelyContinuous.lean,Mathlib/MeasureTheory/Measure/Decomposition/Lebesgue.lean,Mathlib/MeasureTheory/Measure/Map.lean,Mathlib/MeasureTheory/Measure/Prod.lean,Mathlib/MeasureTheory/Measure/Restrict.lean,Mathlib/MeasureTheory/Measure/Stieltjes.lean,Mathlib/MeasureTheory/OuterMeasure/AE.lean,Mathlib/NumberTheory/ArithmeticFunction/Moebius.lean,Mathlib/NumberTheory/Divisors.lean,Mathlib/NumberTheory/FLT/Polynomial.lean,Mathlib/NumberTheory/Padics/PadicNumbers.lean,Mathlib/Probability/Kernel/IonescuTulcea/Traj.lean,Mathlib/Probability/Martingale/Upcrossing.lean,Mathlib/RingTheory/ChainOfDivisors.lean,Mathlib/RingTheory/DedekindDomain/AdicValuation.lean,Mathlib/RingTheory/Discriminant.lean,Mathlib/RingTheory/DividedPowers/SubDPIdeal.lean,Mathlib/RingTheory/LaurentSeries.lean,Mathlib/RingTheory/MvPolynomial/Homogeneous.lean,Mathlib/RingTheory/Perfection.lean,Mathlib/RingTheory/Polynomial/Resultant/Basic.lean,Mathlib/RingTheory/Valuation/Basic.lean,Mathlib/RingTheory/Valuation/Discrete/Basic.lean,Mathlib/RingTheory/Valuation/Integers.lean,Mathlib/RingTheory/Valuation/RankOne.lean,Mathlib/RingTheory/Valuation/ValuationSubring.lean,Mathlib/RingTheory/Valuation/ValuativeRel/Basic.lean,Mathlib/SetTheory/Ordinal/Arithmetic.lean,Mathlib/Topology/Algebra/InfiniteSum/ENNReal.lean,Mathlib/Topology/Algebra/Module/FiniteDimension.lean,Mathlib/Topology/Algebra/Polynomial.lean,Mathlib/Topology/Algebra/ValuativeRel/ValuativeTopology.lean,Mathlib/Topology/Algebra/Valued/NormedValued.lean,Mathlib/Topology/Algebra/Valued/ValuationTopology.lean,Mathlib/Topology/Algebra/Valued/ValuedField.lean,Mathlib/Topology/Algebra/WithZeroTopology.lean,Mathlib/Topology/ContinuousMap/Ideals.lean,Mathlib/Topology/MetricSpace/Antilipschitz.lean,Mathlib/Topology/MetricSpace/PiNat.lean,Mathlib/Topology/MetricSpace/Pseudo/Constructions.lean 92 5 ['github-actions', 'mathlib-bors', 'mathlib-dependent-issues', 'mathlib-merge-conflicts'] nobody
2-70213
2 days ago
23-16977
23 days ago
0-762
12 minutes
39556 b-mehta
author:b-mehta
 feat(Data/Finset): add InjOn variants of image_{subset,eq}_image_iff These are useful for set family combinatorics --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) easy t-data ready-to-merge merge-conflict 18/0 Mathlib/Data/Finset/Image.lean,Mathlib/Data/Finset/Powerset.lean 2 3 ['github-actions', 'mathlib-bors', 'mathlib-merge-conflicts', 'ocfnash'] nobody
2-70208
2 days ago
3-31480
3 days ago
0-50919
14 hours
38786 martinwintermath
author:martinwintermath
 feat(Data/SetLike): add `IsConcreteNeg` Add file `SetLike/Pointwise.lean` with main definition `class IsConcreteNeg` which expresses that a given `Neg` on a `SetLike` objects is compatible with the injection into sets. This is in analogy to `SetLike.IsConcreteLE`. I can think of at least the following object that have or should have a `Neg` instance: - `AddSubmonoid` - `Submodule` - cone variants such as `PointedCone`, `ProperCone`, `ConvexCone`, `PolyhedralCone` (in development) - `AffineSubspace` - convex set variant such as `ConvexSet`, `Polytope`, `Polyhedron` (in development) For demonstration - we rework negation on `Submodule` to make use of `IsConcreteNeg` - we provide `Neg` in `AffineSubspace` The same file should also provide a concrete pointwise scalar multiplication. This will be a future PR. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-data 185/20 Mathlib.lean,Mathlib/Algebra/Module/Submodule/Pointwise.lean,Mathlib/Data/SetLike/Pointwise.lean,Mathlib/Geometry/Convex/Cone/Pointed.lean,Mathlib/LinearAlgebra/AffineSpace/AffineSubspace/Pointwise.lean,Mathlib/LinearAlgebra/Span/Basic.lean 6 3 ['github-actions', 'j-loreaux', 'martinwintermath', 'mathlib-bors'] TwoFX
assignee:TwoFX
2-69450
2 days ago
2-69482
2 days ago
16-72965
16 days
37381 martinwintermath
author:martinwintermath
 chore(LinearAlgebra/SesquilinearForm): deprecate `IsOrtho` and associated lemmas Next steps in cleaning up bilinearity and orthogonality: - deprecate `IsOrtho` and accompanying trivial lemmas (this also allows to shorten the proofs in `orthogonalBilin`). - deprecate `ortho_smul_right` and `ortho_smul_left` since now provable from simp. - remove uses of deprecated definitions. - replace `IsOrtho` in undergrad.yaml by `iIsOrtho`. See discussion at [#mathlib4 > Reorganizing bilinearity and orthogonality?](https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/Reorganizing.20bilinearity.20and.20orthogonality.3F/with/582426197) Due to too agressive simplification I had to remove simp from - `QuadraticMap.associated_apply` - `QuadraticMap.isOrtho_polarBilin` --- - [x] depends on: #37389 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra
label:t-algebra$
 112/97 Mathlib/Algebra/Lie/InvariantForm.lean,Mathlib/Algebra/Lie/TraceForm.lean,Mathlib/Algebra/Lie/Weights/Killing.lean,Mathlib/LinearAlgebra/BilinearForm/Orthogonal.lean,Mathlib/LinearAlgebra/QuadraticForm/Basic.lean,Mathlib/LinearAlgebra/QuadraticForm/IsometryEquiv.lean,Mathlib/LinearAlgebra/QuadraticForm/Radical.lean,Mathlib/LinearAlgebra/QuadraticForm/TensorProduct.lean,Mathlib/LinearAlgebra/QuadraticForm/TensorProduct/Isometries.lean,Mathlib/LinearAlgebra/RootSystem/Finite/Nondegenerate.lean,Mathlib/LinearAlgebra/SesquilinearForm/Basic.lean,docs/undergrad.yaml 12 10 ['github-actions', 'martinwintermath', 'mathlib-dependent-issues', 'mcdoll', 'vihdzp'] nobody
2-69361
2 days ago
3-44940
3 days ago
4-12609
4 days
38896 peabrainiac
author:peabrainiac
 feat(Algebra): multiplicative torsors Introduce a class `Torsor` for torsors of multiplicative groups, as a multiplicative counterpart to the existing `AddTorsor` for torsors of additive groups. --- Adopted / migrated from #8608. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra
label:t-algebra$
 385/286 Mathlib/Algebra/AddTorsor/Basic.lean,Mathlib/Algebra/AddTorsor/Defs.lean,Mathlib/Algebra/Group/Pointwise/Set/Scalar.lean,Mathlib/Algebra/Notation/Defs.lean,Mathlib/Analysis/Convex/Segment.lean,Mathlib/Tactic/Translate/ToAdditive.lean 6 2 ['github-actions', 'grunweg'] nobody
2-69230
2 days ago
2-69304
2 days ago
8-72702
8 days
39547 Hagb
author:Hagb
 chore(Order/Preorder/Finite): use `@[to_dual]` on lemmas about `{Min,Max}imal{For,}` Proofs of other theorems (e.g. in #39427) with dual theorems dependent on these lemmas would benefit from their duality. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-order 11/25 Mathlib/Order/Preorder/Finite.lean 1 4 ['Hagb', 'github-actions', 'vihdzp'] nobody
2-67465
2 days ago
4-7723
4 days ago
4-7434
4 days
38324 BryceT233
author:BryceT233
 chore(RingTheory/AdicCompletion): make `AdicCompletion.map` linear on linear maps This PR upgrades `AdicCompletion.map` to be an R-linear map on the space of linear maps `M →ₗ[R] N`. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-ring-theory 38/12 Mathlib/RingTheory/AdicCompletion/Basic.lean,Mathlib/RingTheory/AdicCompletion/Functoriality.lean 2 2 ['github-actions', 'mathlib-merge-conflicts'] joneugster
assignee:joneugster
2-65129
2 days ago
28-78169
28 days ago
31-60586
31 days
37248 harahu
author:harahu
 doc(Tactic): avoid lazy continuation lines We resolve the ambiguity inherent in lazy (un-indented) list item continuation lines by either indenting them or separating them by inserting a newline in the cases where the item continuation was a mistake. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) documentation 123/114 Mathlib/Tactic/Algebraize.lean,Mathlib/Tactic/Basic.lean,Mathlib/Tactic/CategoryTheory/Coherence/PureCoherence.lean,Mathlib/Tactic/ComputeDegree.lean,Mathlib/Tactic/DepRewrite.lean,Mathlib/Tactic/Finiteness.lean,Mathlib/Tactic/FunProp.lean,Mathlib/Tactic/FunProp/Core.lean,Mathlib/Tactic/FunProp/Theorems.lean,Mathlib/Tactic/Linarith/Oracle/FourierMotzkin.lean,Mathlib/Tactic/Linter/FlexibleLinter.lean,Mathlib/Tactic/Order.lean,Mathlib/Tactic/SimpIntro.lean,Mathlib/Tactic/Simps/Basic.lean,Mathlib/Tactic/Widget/InteractiveUnfold.lean 15 4 ['Multramate', 'github-actions', 'grunweg', 'harahu', 'mathlib-merge-conflicts'] grunweg
assignee:grunweg
2-51966
2 days ago
8-11657
8 days ago
56-18673
56 days
35281 harahu
author:harahu
 chore: fix markdown list indentation WIP --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) WIP 790/413 Mathlib/Algebra/Category/ModuleCat/Presheaf/ColimitFunctor.lean,Mathlib/Algebra/Homology/SpectralSequence/ComplexShape.lean,Mathlib/Algebra/Lie/OfAssociative.lean,Mathlib/Algebra/Lie/Prod.lean,Mathlib/AlgebraicGeometry/EllipticCurve/LFunction.lean,Mathlib/AlgebraicGeometry/Gluing.lean,Mathlib/AlgebraicGeometry/Morphisms/Basic.lean,Mathlib/AlgebraicGeometry/Morphisms/Flat.lean,Mathlib/AlgebraicGeometry/Morphisms/RingHomProperties.lean,Mathlib/AlgebraicGeometry/Properties.lean,Mathlib/AlgebraicTopology/CechNerve.lean,Mathlib/AlgebraicTopology/SimplexCategory/Defs.lean,Mathlib/AlgebraicTopology/SimplicialSet/Subdivision.lean,Mathlib/AlgebraicTopology/SimplicialSet/TopAdj.lean,Mathlib/Analysis/CStarAlgebra/Module/Constructions.lean,Mathlib/Analysis/Convex/KreinMilman.lean,Mathlib/Analysis/Distribution/ContDiffMapSupportedIn.lean,Mathlib/Analysis/Normed/Field/Approximation.lean,Mathlib/Analysis/Normed/Field/Dense.lean,Mathlib/Analysis/Normed/Field/Krasner.lean,Mathlib/Analysis/Normed/Group/SemiNormedGrp/Completion.lean,Mathlib/Analysis/Normed/Module/Bases.lean,Mathlib/Analysis/SpecialFunctions/Trigonometric/Chebyshev/Extremal.lean,Mathlib/CategoryTheory/Abelian/Preradical/Colon.lean,Mathlib/CategoryTheory/Bicategory/Basic.lean,Mathlib/CategoryTheory/Category/ULift.lean,Mathlib/CategoryTheory/GlueData.lean,Mathlib/CategoryTheory/Limits/Shapes/Pullback/ChosenPullback.lean,Mathlib/CategoryTheory/Monoidal/Category.lean,Mathlib/CategoryTheory/Sites/Coverage.lean,Mathlib/CategoryTheory/Sites/Point/OfIsCofiltered.lean,Mathlib/CategoryTheory/Sites/PrecoverageToGrothendieck.lean,Mathlib/CategoryTheory/WithTerminal/Basic.lean,Mathlib/Combinatorics/SimpleGraph/Connectivity/Finite.lean,Mathlib/Combinatorics/SimpleGraph/Regularity/Lemma.lean,Mathlib/Data/Bracket.lean,Mathlib/Data/Finset/Density.lean,Mathlib/Data/NNRat/Defs.lean,Mathlib/Dynamics/SymbolicDynamics/Basic.lean,Mathlib/FieldTheory/Finite/Basic.lean,Mathlib/FieldTheory/SeparablyGenerated.lean,Mathlib/Lean/Meta/RefinedDiscrTree/Basic.lean,Mathlib/LinearAlgebra/InvariantBasisNumber.lean,Mathlib/LinearAlgebra/LinearPMap.lean,Mathlib/LinearAlgebra/PerfectPairing/Basic.lean,Mathlib/LinearAlgebra/TensorAlgebra/Basic.lean,Mathlib/Logic/Equiv/Fin/Rotate.lean,Mathlib/MeasureTheory/Group/Action.lean,Mathlib/MeasureTheory/Integral/Bochner/Basic.lean,Mathlib/MeasureTheory/Integral/Bochner/L1.lean,Mathlib/MeasureTheory/Order/UpperLower.lean,Mathlib/MeasureTheory/VectorMeasure/Integral.lean,Mathlib/ModelTheory/Arithmetic/Presburger/Semilinear/Basic.lean,Mathlib/NumberTheory/NumberField/CanonicalEmbedding/NormLeOne.lean,Mathlib/Order/Birkhoff.lean,Mathlib/Order/CompleteBooleanAlgebra.lean,Mathlib/Order/Zorn.lean,Mathlib/Probability/Process/Adapted.lean,Mathlib/RingTheory/Smooth/Flat.lean,Mathlib/RingTheory/Spectrum/Prime/ChevalleyComplexity.lean,Mathlib/RingTheory/Spectrum/Prime/Jacobson.lean,Mathlib/RingTheory/Valuation/Discrete/RankOne.lean,Mathlib/RingTheory/ZariskisMainTheorem.lean,Mathlib/Tactic/Algebra/Basic.lean,Mathlib/Tactic/Algebraize.lean,Mathlib/Tactic/Basic.lean,Mathlib/Tactic/CategoryTheory/CancelIso.lean,Mathlib/Tactic/CategoryTheory/Coherence/Normalize.lean,Mathlib/Tactic/CategoryTheory/Coherence/PureCoherence.lean,Mathlib/Tactic/ComputeDegree.lean,Mathlib/Tactic/DepRewrite.lean,Mathlib/Tactic/Finiteness.lean,Mathlib/Tactic/FunProp.lean,Mathlib/Tactic/FunProp/Core.lean,Mathlib/Tactic/FunProp/Theorems.lean,Mathlib/Tactic/Linarith/Frontend.lean,Mathlib/Tactic/Linarith/Oracle/FourierMotzkin.lean,Mathlib/Tactic/Linarith/Oracle/SimplexAlgorithm/PositiveVector.lean,Mathlib/Tactic/Linter/FlexibleLinter.lean,Mathlib/Tactic/Order.lean,Mathlib/Tactic/SimpIntro.lean,Mathlib/Tactic/Simps/Basic.lean,Mathlib/Tactic/Translate/Core.lean,Mathlib/Tactic/Widget/InteractiveUnfold.lean,Mathlib/Topology/Category/Profinite/AsLimit.lean,Mathlib/Topology/Continuous.lean,Mathlib/Topology/DiscreteQuotient.lean,Mathlib/Topology/Gluing.lean,Mathlib/Topology/Maps/Proper/Basic.lean,Mathlib/Topology/MetricSpace/UniformConvergence.lean,Mathlib/Topology/Sheaves/Presheaf.lean,Mathlib/Topology/Sheaves/Sheaf.lean,Mathlib/Topology/Sheaves/SheafOfFunctions.lean,Mathlib/Topology/Sion.lean,scripts/check_docstring_list_indentation.py 95 15 ['github-actions', 'harahu', 'mathlib-merge-conflicts'] nobody
2-51632
2 days ago
unknown
0-0
0 seconds
36299 grunweg
author:grunweg
 feat: metric connections This file defines what it means for a connection on a Riemannian vector bundle `(V, g)` to be *compatible* with the metric `g`. Namely, the differentiated metric tensor `∇ g` (defined by `(X, σ, τ) ↦ X g(σ, τ) - g(∇_X σ, τ) - g(σ, ∇_X τ)`) should vanish on all differentiable vector fields `X` and differentiable sections `σ`, `τ`. From the path towards the Levi-Civita connection and Riemannian geometry. Co-authored-by: Heather Macbeth [25316162+hrmacbeth@users.noreply.github.com](mailto:25316162+hrmacbeth@users.noreply.github.com) Co-authored-by: Patrick Massot [patrickmassot@free.fr](mailto:patrickmassot@free.fr) --- WIP: after the pre-requisite PRs below have been merged, update this PR with the current state on #36036. Then it will be ready for review again. - [x] depends on: #36279 - [x] depends on: #34263 - [x] depends on: #39485 - [ ] depends on: #39554 - [ ] depends on: #39513 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) WIP t-differential-geometry merge-conflict blocked-by-other-PR 296/0 Mathlib.lean,Mathlib/Geometry/Manifold/MFDeriv/SpecificFunctions.lean,Mathlib/Geometry/Manifold/VectorBundle/CovariantDerivative/Metric.lean 3 23 ['github-actions', 'grunweg', 'leanprover-radar', 'mathlib-dependent-issues', 'mathlib-merge-conflicts', 'or4nge19', 'sgouezel'] nobody
2-50458
2 days ago
76-85346
76 days ago
0-10
10 seconds
36036 grunweg
author:grunweg
 [placeholder PR uniting ongoing work on connections and geodesics] --- - [x] depends on: #34263 - [x] depends on: #36277 - [x] depends on: #36279 - [x] depends on: #36285 - [ ] depends on: #36299 - [x] depends on: #37537 - [x] depends on: #34257 - [x] depends on: #39226 - [x] depends on: #39451 - [x] depends on: #39485 - [ ] depends on: #39554 - [ ] depends on: #39513 - [x] depends on: #39486 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) WIP t-differential-geometry blocked-by-other-PR merge-conflict 4843/69 Mathlib.lean,Mathlib/Geometry/Manifold/CheatSheet.md,Mathlib/Geometry/Manifold/MFDeriv/NormedSpace.lean,Mathlib/Geometry/Manifold/MFDeriv/SpecificFunctions.lean,Mathlib/Geometry/Manifold/Riemannian/ExistsRiemannianMetric.lean,Mathlib/Geometry/Manifold/VectorBundle/Basic.lean,Mathlib/Geometry/Manifold/VectorBundle/ContMDiffSection.lean,Mathlib/Geometry/Manifold/VectorBundle/CovariantDerivative/Basic.lean,Mathlib/Geometry/Manifold/VectorBundle/CovariantDerivative/ChristoffelSymbols.lean,Mathlib/Geometry/Manifold/VectorBundle/CovariantDerivative/Curvature.lean,Mathlib/Geometry/Manifold/VectorBundle/CovariantDerivative/Ehresmann.lean,Mathlib/Geometry/Manifold/VectorBundle/CovariantDerivative/Geodesics.lean,Mathlib/Geometry/Manifold/VectorBundle/CovariantDerivative/IntegralCurvePrelim.lean,Mathlib/Geometry/Manifold/VectorBundle/CovariantDerivative/LeviCivita.lean,Mathlib/Geometry/Manifold/VectorBundle/CovariantDerivative/Lift.lean,Mathlib/Geometry/Manifold/VectorBundle/CovariantDerivative/Metric.lean,Mathlib/Geometry/Manifold/VectorBundle/CovariantDerivative/Prelim.lean,Mathlib/Geometry/Manifold/VectorBundle/CovariantDerivative/Torsion2.lean,Mathlib/Geometry/Manifold/VectorBundle/CovariantDerivative/TrivPrelim.lean,Mathlib/Geometry/Manifold/VectorBundle/CovariantDerivative/Trivial.lean,Mathlib/Geometry/Manifold/VectorBundle/GramSchmidtOrtho.lean,Mathlib/Geometry/Manifold/VectorBundle/Hom.lean,Mathlib/Geometry/Manifold/VectorBundle/LocalFrame.lean,Mathlib/Geometry/Manifold/VectorBundle/MDifferentiable.lean,Mathlib/Geometry/Manifold/VectorBundle/OrthonormalFrame.lean,Mathlib/Geometry/Manifold/VectorBundle/Tensoriality.lean,Mathlib/Geometry/Manifold/VectorBundle/Unused.lean,Mathlib/Geometry/Manifold/VectorField/LieBracket.lean 28 9 ['github-actions', 'grunweg', 'mathlib-dependent-issues', 'mathlib-merge-conflicts'] nobody
2-50449
2 days ago
80-43175
80 days ago
0-7
7 seconds
39606 harahu
author:harahu
 doc: remove superfluous empty lines These aren't needed. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) 0/704 Mathlib/Algebra/Algebra/RestrictScalars.lean,Mathlib/Algebra/Algebra/Subalgebra/MulOpposite.lean,Mathlib/Algebra/Algebra/Subalgebra/Rank.lean,Mathlib/Algebra/Category/ContinuousCohomology/Basic.lean,Mathlib/Algebra/Category/Grp/EnoughInjectives.lean,Mathlib/Algebra/Category/Grp/FiniteGrp.lean,Mathlib/Algebra/Category/ModuleCat/AB.lean,Mathlib/Algebra/Category/ModuleCat/Ext/DimensionShifting.lean,Mathlib/Algebra/Category/ModuleCat/Ext/Finite.lean,Mathlib/Algebra/Category/ModuleCat/Ext/HasExt.lean,Mathlib/Algebra/Category/ModuleCat/Localization.lean,Mathlib/Algebra/Category/ModuleCat/Presheaf.lean,Mathlib/Algebra/Category/ModuleCat/ProjectiveDimension.lean,Mathlib/Algebra/Category/ModuleCat/Stalk.lean,Mathlib/Algebra/Category/ModuleCat/Topology/Homology.lean,Mathlib/Algebra/Category/ModuleCat/Ulift.lean,Mathlib/Algebra/Category/Ring/FinitePresentation.lean,Mathlib/Algebra/Central/TensorProduct.lean,Mathlib/Algebra/CharP/Algebra.lean,Mathlib/Algebra/CharP/IntermediateField.lean,Mathlib/Algebra/CharZero/Defs.lean,Mathlib/Algebra/DirectSum/Decomposition.lean,Mathlib/Algebra/EuclideanDomain/Defs.lean,Mathlib/Algebra/GCDMonoid/IntegrallyClosed.lean,Mathlib/Algebra/Group/Indicator.lean,Mathlib/Algebra/Group/Submonoid/Units.lean,Mathlib/Algebra/GroupWithZero/Hom.lean,Mathlib/Algebra/Homology/DerivedCategory/Ext/MapBijective.lean,Mathlib/Algebra/Lie/Derivation/BaseChange.lean,Mathlib/Algebra/Lie/SemiDirect.lean,Mathlib/Algebra/Lie/Sl2.lean,Mathlib/Algebra/Module/FinitePresentation.lean,Mathlib/Algebra/Module/LocalizedModule/Int.lean,Mathlib/Algebra/Module/Projective.lean,Mathlib/Algebra/Module/SnakeLemma.lean,Mathlib/Algebra/Module/Submodule/Defs.lean,Mathlib/Algebra/Module/Submodule/IterateMapComap.lean,Mathlib/Algebra/Module/Submodule/Lattice.lean,Mathlib/Algebra/Module/Submodule/LinearMap.lean,Mathlib/Algebra/Module/Submodule/RestrictScalars.lean,Mathlib/Algebra/MonoidAlgebra/Degree.lean,Mathlib/Algebra/MvPolynomial/Monad.lean,Mathlib/Algebra/MvPolynomial/Variables.lean,Mathlib/Algebra/Order/Antidiag/FinsuppEquiv.lean,Mathlib/Algebra/Order/Chebyshev.lean,Mathlib/Algebra/Order/GroupWithZero/WithZero.lean,Mathlib/Algebra/Order/Hom/TypeTags.lean,Mathlib/Algebra/Order/Module/Defs.lean,Mathlib/Algebra/Order/Module/Synonym.lean,Mathlib/Algebra/Order/Monoid/LocallyFiniteOrder.lean,Mathlib/Algebra/Order/Monoid/Unbundled/Defs.lean,Mathlib/Algebra/Polynomial/Basis.lean,Mathlib/Algebra/Polynomial/PartialFractions.lean,Mathlib/Algebra/Polynomial/RuleOfSigns.lean,Mathlib/Algebra/Polynomial/Sequence.lean,Mathlib/Algebra/QuadraticAlgebra/Defs.lean,Mathlib/Algebra/Ring/Subring/MulOpposite.lean,Mathlib/Algebra/Ring/Subring/Units.lean,Mathlib/Algebra/Ring/Subsemiring/MulOpposite.lean,Mathlib/Algebra/Tropical/Basic.lean,Mathlib/Algebra/Tropical/BigOperators.lean,Mathlib/Algebra/Tropical/Lattice.lean,Mathlib/AlgebraicGeometry/AffineTransitionLimit.lean,Mathlib/AlgebraicGeometry/Birational/RationalMap.lean,Mathlib/AlgebraicGeometry/ColimitsOver.lean,Mathlib/AlgebraicGeometry/Cover/Over.lean,Mathlib/AlgebraicGeometry/EllipticCurve/IsomOfJ.lean,Mathlib/AlgebraicGeometry/EllipticCurve/NormalForms.lean,Mathlib/AlgebraicGeometry/Gluing.lean,Mathlib/AlgebraicGeometry/Modules/Tilde.lean,Mathlib/AlgebraicGeometry/Morphisms/Affine.lean,Mathlib/AlgebraicGeometry/Morphisms/ClosedImmersion.lean,Mathlib/AlgebraicGeometry/Morphisms/Constructors.lean,Mathlib/AlgebraicGeometry/Morphisms/Etale.lean,Mathlib/AlgebraicGeometry/Morphisms/Finite.lean,Mathlib/AlgebraicGeometry/Morphisms/FinitePresentation.lean,Mathlib/AlgebraicGeometry/Morphisms/Immersion.lean,Mathlib/AlgebraicGeometry/Morphisms/Integral.lean,Mathlib/AlgebraicGeometry/Morphisms/IsIso.lean,Mathlib/AlgebraicGeometry/Morphisms/LocalFlatDescent.lean,Mathlib/AlgebraicGeometry/Morphisms/OpenImmersion.lean,Mathlib/AlgebraicGeometry/Morphisms/Preimmersion.lean,Mathlib/AlgebraicGeometry/Morphisms/Proper.lean,Mathlib/AlgebraicGeometry/Morphisms/RingHomProperties.lean,Mathlib/AlgebraicGeometry/Morphisms/Separated.lean,Mathlib/AlgebraicGeometry/Morphisms/Smooth.lean,Mathlib/AlgebraicGeometry/Morphisms/WeaklyEtale.lean,Mathlib/AlgebraicGeometry/PointsPi.lean,Mathlib/AlgebraicGeometry/ProjectiveSpectrum/Basic.lean,Mathlib/AlgebraicGeometry/ProjectiveSpectrum/StructureSheaf.lean,Mathlib/AlgebraicGeometry/QuasiAffine.lean,Mathlib/AlgebraicGeometry/ResidueField.lean,Mathlib/AlgebraicGeometry/Sites/ElladicCohomology.lean,Mathlib/AlgebraicGeometry/Sites/Etale.lean,Mathlib/AlgebraicGeometry/Sites/MorphismProperty.lean,Mathlib/AlgebraicGeometry/Sites/Proetale.lean,Mathlib/AlgebraicGeometry/Sites/SmallAffineZariski.lean,Mathlib/AlgebraicGeometry/StructureSheaf.lean,Mathlib/AlgebraicGeometry/ZariskisMainTheorem.lean,Mathlib/AlgebraicTopology/AlternatingFaceMapComplex.lean 661 1 ['github-actions'] nobody
2-49710
2 days ago
unknown
0-0
0 seconds
39506 b-mehta
author:b-mehta
 feat(Data/Complex/Basic): add simproc to reduce powers of I This is enabled by default to make eg i^5 simplify automatically. We intentionally require the exponent to be a numeral, as this is intended to be a reduction statement, and for symbolic `n`, the lemma `I_pow_eq_pow_mod` should be used instead. Note that we can't have `I_pow_eq_pow_mod` as a simp lemma due to looping. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-data 65/5 Mathlib/Algebra/Group/Defs.lean,Mathlib/Analysis/Meromorphic/FactorizedRational.lean,Mathlib/Analysis/SpecialFunctions/Elliptic/Weierstrass.lean,Mathlib/Data/Complex/Basic.lean,MathlibTest/Simproc/IPow.lean 5 14 ['Paul-Lez', 'b-mehta', 'eric-wieser', 'github-actions'] nobody
2-47685
2 days ago
3-82858
3 days ago
5-19871
5 days
39565 scholzhannah
author:scholzhannah
 chore: rename some OpenPartialHomeomorph declarations In the review of #39084, a few suggested renames relating to `OpenPartialHomeomorph` came up which I am doing in this PR. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-topology 58/43 Mathlib/Analysis/InnerProductSpace/Calculus.lean,Mathlib/Geometry/Manifold/ContMDiff/Defs.lean,Mathlib/Geometry/Manifold/ContMDiffMFDeriv.lean,Mathlib/Geometry/Manifold/Instances/Icc.lean,Mathlib/Geometry/Manifold/Instances/Sphere.lean,Mathlib/Geometry/Manifold/IsManifold/ExtChartAt.lean,Mathlib/Geometry/Manifold/LocalDiffeomorph.lean,Mathlib/Geometry/Manifold/LocalInvariantProperties.lean,Mathlib/Geometry/Manifold/MFDeriv/Basic.lean,Mathlib/Geometry/Manifold/VectorBundle/Basic.lean,Mathlib/Geometry/Manifold/VectorBundle/MDifferentiable.lean,Mathlib/Geometry/Manifold/VectorBundle/Tangent.lean,Mathlib/Logic/Equiv/PartialEquiv.lean,Mathlib/Topology/OpenPartialHomeomorph/Composition.lean,Mathlib/Topology/OpenPartialHomeomorph/Constructions.lean,Mathlib/Topology/OpenPartialHomeomorph/Defs.lean 16 6 ['github-actions', 'grunweg', 'scholzhannah', 'themathqueen'] grunweg
assignee:grunweg
2-45255
2 days ago
2-45148
2 days ago
2-49665
2 days
39084 scholzhannah
author:scholzhannah
 feat: generalize `OpenPartialHomeomorph.Defs` file to `PartialHomeomorph` As discussed on Zulip ([#mathlib4 > Generalizing `PartialHomeomorph`?](https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/Generalizing.20.60PartialHomeomorph.60.3F/with/536896273)), I renamed `PartialHomeomorph` to `OpenPartialHomeomorph` in #29113. In this PR I now add a new `PartialHomeomorph` which is a `PartialEquiv` that is continuous on both source and target. An `OpenPartialHomeomorph` is then a `PartialHomeomorph` that additionally has open source and target. In subsequent PRs I will generalize the other files. See this draft PR (#39071) for what I think the end result might be. `PartialHomeomorph` should find uses at least for manifolds (`ModelWithCorners`). Afterwards, I want to add a `ClosedPartialHomeomorph` to use for CWComplexes. --- I don't have a lot of experience doing these kind of modifications of a large piece of code. Additionally, I am not familiar with the main uses of `OpenPartialHomeomorph` in Mathlib. So while I did this to the best of my abilities, you should read this carefully because there might be things I did wrong or in non-ideal ways. - [ ] depends on: #39565 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-topology blocked-by-other-PR 352/89 Mathlib.lean,Mathlib/Analysis/InnerProductSpace/Calculus.lean,Mathlib/Geometry/Manifold/ContMDiff/Defs.lean,Mathlib/Geometry/Manifold/ContMDiffMFDeriv.lean,Mathlib/Geometry/Manifold/Instances/Icc.lean,Mathlib/Geometry/Manifold/Instances/Sphere.lean,Mathlib/Geometry/Manifold/IsManifold/Basic.lean,Mathlib/Geometry/Manifold/IsManifold/ExtChartAt.lean,Mathlib/Geometry/Manifold/LocalDiffeomorph.lean,Mathlib/Geometry/Manifold/LocalInvariantProperties.lean,Mathlib/Geometry/Manifold/LocalSourceTargetProperty.lean,Mathlib/Geometry/Manifold/MFDeriv/Basic.lean,Mathlib/Geometry/Manifold/VectorBundle/Basic.lean,Mathlib/Geometry/Manifold/VectorBundle/MDifferentiable.lean,Mathlib/Geometry/Manifold/VectorBundle/Tangent.lean,Mathlib/Logic/Equiv/PartialEquiv.lean,Mathlib/NumberTheory/NumberField/CanonicalEmbedding/NormLeOne.lean,Mathlib/Topology/FiberBundle/Trivialization.lean,Mathlib/Topology/OpenPartialHomeomorph/Basic.lean,Mathlib/Topology/OpenPartialHomeomorph/Composition.lean,Mathlib/Topology/OpenPartialHomeomorph/Constructions.lean,Mathlib/Topology/OpenPartialHomeomorph/Defs.lean,Mathlib/Topology/OpenPartialHomeomorph/IsImage.lean,Mathlib/Topology/PartialHomeomorph/Defs.lean 24 23 ['github-actions', 'grunweg', 'j-loreaux', 'mathlib-dependent-issues', 'scholzhannah'] grunweg and j-loreaux
assignee:j-loreaux assignee:grunweg
2-44599
2 days ago
3-43228
3 days ago
8-23672
8 days
39503 jvanwinden
author:jvanwinden
 feat(Probability): add API for infinite product measures This PR introduces two lemmas which serve as API for infinite product measures: - `ProbabilityTheory.Measure.hasLaw_infinitePi_eval`: the `i`-th coordinate on an infinite product measure has law `μ i` - `ProbabilityTheory.Measure.map_infinitePi_infinitePi_of_inj`: when `f : ι → ι` is injective, then the pushforward of the coordinates rearranged according to `f` (i.e., the law of `fun ω i ↦ ω (f i)` is the same as the infinite product of the rearranged laws. The second lemma bears some resemblance to `infinitePi_map_piCongrLeft`, but does not require `f` to be a bijection and probably is easier to work with in practice. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-measure-probability awaiting-author 14/0 Mathlib/Probability/Independence/InfinitePi.lean,Mathlib/Probability/ProductMeasure.lean 2 17 ['CoolRmal', 'DavidLedvinka', 'EtienneC30', 'github-actions', 'jvanwinden'] EtienneC30
assignee:EtienneC30
2-43304
2 days ago
2-48706
2 days ago
2-78791
2 days
39599 AntoineChambert-Loir
author:AntoineChambert-Loir
 feat(RingTheory/GeneralizedEuclidean): the canonical Euclidean filtration on a ring * Define the canonical euclidean filtration on a semiring * Define the euclidean level of an element of a semiring. * A semiring is euclidean (in the generalized sense) if and only if the filtration is exhaustive. Note : The PR defines two variants, one is Nat-indexed, and the other one, more general, is Ordinal-indexed. Probably the first one should be deleted. TODO : * prove that the euclidean level is the minimal stathm of a euclidean algorithm. * give examples (Nat, Int, Polynomial…) --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) WIP t-ring-theory t-algebra
label:t-algebra$
 585/0 Mathlib.lean,Mathlib/RingTheory/GeneralizedEuclidean.lean,docs/references.bib 3 2 ['eric-wieser', 'github-actions'] nobody
2-40870
2 days ago
2-83820
2 days ago
0-17
17 seconds
39501 jvanwinden
author:jvanwinden
 feat(MeasureTheory/Measure/Tight): tightness of marginals implies tightness on product space This PR introduces `IsTightMeasureSet.prodMk`, which says that a set of measures on a product space is tight if both sets of marginals are tight. This is useful when proving weak compactness of probability measures on product spaces (via Prokhorov). The proof makes use of `isTightMeasureSet_iff_exists_isCompact_measure_compl_le` and then proceeds in the conventional way. I also tried to write a purely filter-theoretic proof, but did not really succeed and it was nowhere near as simple as the direct proof. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-measure-probability 19/0 Mathlib/MeasureTheory/Measure/Tight.lean 1 6 ['EtienneC30', 'github-actions', 'jvanwinden'] EtienneC30
assignee:EtienneC30
2-40235
2 days ago
2-40235
2 days ago
5-42414
5 days
38369 quantumsnow
author:quantumsnow
 feat(AlgebraicTopology): Eilenberg Steenrod axioms This introduces the Eilenberg-Steenrod axioms for a homology theory. --- - [x] depends on: #36621 - [ ] depends on: #39236 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor t-algebraic-topology blocked-by-other-PR 365/0 Mathlib.lean,Mathlib/AlgebraicTopology/EilenbergSteenrod.lean,Mathlib/Topology/Category/TopCat/Basic.lean,Mathlib/Topology/Category/TopPair.lean 4 38 ['chrisflav', 'github-actions', 'joelriou', 'mathlib-dependent-issues', 'mathlib-merge-conflicts', 'quantumsnow'] nobody
2-40040
2 days ago
10-46336
10 days ago
3-44318
3 days
38848 jcreinhold
author:jcreinhold
 feat(AlgebraicTopology/SimplicialSet): exists_isPushout_of_ne_top Every proper subcomplex of a simplicial set extends by attaching a single cell along its boundary, exhibited as a pushout of `∂Δ[n] ↪ Δ[n]`. This is the per-cell input for cell-by-cell filtrations of monomorphisms in `SSet`. Adapted from @joelriou 's [proof](https://github.com/joelriou/topcat-model-category/blob/813338a8c88cfe0096deed7e3ba7daf92d4a1c71/TopCatModelCategory/SSet/Boundary.lean#L187). I also added the supporting lemma `Types.isPullback_of_eq_setPreimage` (set-preimage square is a pullback in `Type u`). AI use: Claude helped locate `subtype_val_mono` and the `backward.isDefEq.respectTransparency` option. t-algebraic-topology new-contributor 120/3 Mathlib/AlgebraicTopology/SimplicialSet/Boundary.lean,Mathlib/CategoryTheory/Limits/Types/Pullbacks.lean 2 25 ['github-actions', 'jcreinhold', 'joelriou', 'mckoen'] joelriou
assignee:joelriou
2-39952
2 days ago
13-9761
13 days ago
19-64649
19 days
39611 mbkybky
author:mbkybky
 feat(RingTheory): let `B` be a faithfully flat `A`-algebra, then `A` is a local ring if `B` is Let `B` be a faithfully flat `A`-algebra, then `A` is a local ring if `B` is. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-ring-theory 13/0 Mathlib/RingTheory/Flat/FaithfullyFlat/Algebra.lean 1 1 ['github-actions'] nobody
2-38894
2 days ago
2-38977
2 days ago
2-38688
2 days
34913 Thmoas-Guan
author:Thmoas-Guan
 feat(RingTheory): Definition of complete intersection local ring feat(RingTheory): Definition of Complete intersection ring In this PR we give the definition of complete intersection local ring by `epsilon_1(R)+ dim(R)` equal to span rank of its maximal ideal. We also proved for quotient of regular local ring, it is CI iff the ideal being quotient out is generated by regular sequence. --- - [ ] depends on: #26245 - [ ] depends on: #29533 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) blocked-by-other-PR large-import 7002/202 Mathlib.lean,Mathlib/Algebra/Category/ModuleCat/Basic.lean,Mathlib/Algebra/Category/ModuleCat/Ext/Basic.lean,Mathlib/Algebra/Category/Ring/FilteredColimitsLocal.lean,Mathlib/Algebra/Module/SpanRank.lean,Mathlib/AlgebraicGeometry/Properties.lean,Mathlib/FieldTheory/SeparablyGenerated.lean,Mathlib/FieldTheory/TranscendentalSeparable.lean,Mathlib/LinearAlgebra/ExteriorPower/Basic.lean,Mathlib/LinearAlgebra/ExteriorPower/Basis.lean,Mathlib/RingTheory/AdicCompletion/LocalRing.lean,Mathlib/RingTheory/AdicCompletion/Noetherian.lean,Mathlib/RingTheory/CohenMacaulay/Basic.lean,Mathlib/RingTheory/CohenMacaulay/Catenary.lean,Mathlib/RingTheory/CohenMacaulay/Maximal.lean,Mathlib/RingTheory/CohenStructureTheorem.lean,Mathlib/RingTheory/CompleteIntersection/Basic.lean,Mathlib/RingTheory/Depth/Basic.lean,Mathlib/RingTheory/Depth/Ischebeck.lean,Mathlib/RingTheory/Depth/Rees.lean,Mathlib/RingTheory/Filtration.lean,Mathlib/RingTheory/Flat/Extension.lean,Mathlib/RingTheory/Ideal/Height.lean,Mathlib/RingTheory/Ideal/KrullsHeightTheorem.lean,Mathlib/RingTheory/Ideal/Maps.lean,Mathlib/RingTheory/Ideal/Operations.lean,Mathlib/RingTheory/KoszulComplex/Cocomplex.lean,Mathlib/RingTheory/KoszulComplex/Complex.lean,Mathlib/RingTheory/KoszulComplex/Homotopy.lean,Mathlib/RingTheory/KrullDimension/PID.lean,Mathlib/RingTheory/LocalRing/ResidueField/Ideal.lean,Mathlib/RingTheory/Nilpotent/GeometricallyReduced.lean,Mathlib/RingTheory/Regular/Free.lean,Mathlib/RingTheory/Regular/LinearMap.lean,Mathlib/RingTheory/RegularLocalRing/Basic.lean,Mathlib/RingTheory/RegularLocalRing/PowerSeries.lean,Mathlib/RingTheory/Smooth/Field.lean,docs/references.bib 38 7 ['github-actions', 'mathlib-dependent-issues', 'mathlib-merge-conflicts'] nobody
2-38749
2 days ago
105-29912
105 days ago
0-12
12 seconds
39605 Qinghev
author:Qinghev
 Add docstrings for reversed range telescoping lemmas This PR adds docstrings for two existing Finset telescoping lemmas and their additive versions generated by `to_additive`: * `Finset.prod_range_div'` / `Finset.sum_range_sub'` * `Finset.eq_prod_range_div` / `Finset.eq_sum_range_sub` The goal is a small documentation-only contribution that makes the reversed range telescoping API easier to discover from search and hover docs. Local checks: * `git diff --check -- Mathlib/Algebra/BigOperators/Group/Finset/Basic.lean` * Attempted `lake env lean Mathlib/Algebra/BigOperators/Group/Finset/Basic.lean`, but local validation is currently blocked by downloading the `leanprover/lean4:v4.30.0-rc2` toolchain from GitHub timing out/connection-resetting on this machine. Opened as draft until the toolchain/network check can be completed or CI confirms the documentation-only change. t-algebra new-contributor
label:t-algebra$
 8/2 Mathlib/Algebra/BigOperators/Group/Finset/Basic.lean 1 2 ['github-actions'] nobody
2-37342
2 days ago
2-37342
2 days ago
2-37053
2 days
39063 khwilson
author:khwilson
 feat(Topology/Algebra/Module/LocallyConvex): a very nice basis of locally convex spaces In proving facts about locally convex spaces, you often work with a basis of the neighborhoods of 0 that are open, symmetric, convex, antitone, and have the property that `V (n + 1) + V (n + 1) ⊆ V n` and `closure (V (n + 1)) ⊆ V n`. These lemmas construct such a basis. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-topology awaiting-author 89/0 Mathlib/Topology/Algebra/Group/Pointwise.lean,Mathlib/Topology/Algebra/Module/LocallyConvex.lean 2 7 ['github-actions', 'j-loreaux', 'khwilson'] j-loreaux
assignee:j-loreaux
2-34995
2 days ago
3-17509
3 days ago
11-49720
11 days
39574 FordUniver
author:FordUniver
 feat(Analysis/Calculus/LipschitzSmooth): add `LipschitzSmoothWith` and `CocoerciveWith` Introduces `LipschitzSmoothWith K f` on a normed real vector space and `CocoerciveWith K f` on a Hilbert space. `LipschitzSmoothWith` is opaque with characterisations in four derivative-flavoured forms (directional, Fréchet, 1D, gradient) under appropriate differentiability hypotheses, plus descent-inequality extractors and variance bounds; `CocoerciveWith` is an `abbrev` with the elementary direction `K`-cocoercive ⟹ `K`-Lipschitz gradient. --- The `lineDeriv` form is the internal canonical form because it does not presuppose Fréchet differentiability; the `@[expose]` annotation is deliberately omitted so that downstream code reaches the predicate through the named iff/extractor API rather than direct destruction, treating the choice as an implementation detail. The `K / 2` convention is chosen so that the descent lemma is constant-preserving: a function with `K`-Lipschitz Fréchet derivative is exactly `K`-smooth in this sense. This PR is intentionally minimal and contains only the definition and some basic `rw` and `apply` lemmas. I have some follow up PRs planned (not fully polished yet) that establish the usual implications plus pre-requisites: 1. **Descent lemma.** Derives `LipschitzSmoothWith K f` from `LipschitzWith K (fderiv ℝ f)` (and its 1D / gradient variants) under `Differentiable ℝ f`, via segment-level FTC. [diff](https://github.com/FordUniver/mathlib4/compare/diffbase/lipschitzSmooth-descent...feat/lipschitzSmooth-descent) 2. **First-order convex inequalities.** Adds `ConvexOn.add_{lineDeriv,fderiv,gradient,deriv}_le` (and strict variants + concave duals) — the tangent-line-lower-bound characterisations of `ConvexOn`. [diff](https://github.com/FordUniver/mathlib4/compare/diffbase/convex-first-order-inequalities...feat/convex-first-order-inequalities) 3. **Baillon-Haddad theorem and convex equivalences.** Under `ConvexOn ℝ Set.univ f` + `Differentiable ℝ f`, `LipschitzSmoothWith K f → CocoerciveWith K f`, closing the four-way equivalence with `LipschitzWith K (fderiv ℝ f)` and `LipschitzWith K (∇ f)`. [diff](https://github.com/FordUniver/mathlib4/compare/diffbase/lipschitzSmooth-convex...feat/lipschitzSmooth-convex) 4. **Continuity and the `K = 0` boundary case.** A continuity statement `LipschitzSmoothWith K f → Continuous f` (non-trivial in the general non-differentiable case), and the characterisation `LipschitzSmoothWith 0 f ↔ ConcaveOn ℝ Set.univ f` under differentiability. 5. **Algebraic preservation lemmas.** `LipschitzSmoothWith` closed under `+` (with `K₁ + K₂`), `c •` for `c ≥ 0` (with `c · K`), composition with affine maps (with `‖A.linear‖² · K`). [diff](https://github.com/FordUniver/mathlib4/compare/feat/lipschitzSmooth-basic...feat/lipschitzSmooth-algebra) Beyond those, larger-picture generalisations remain open: a set-restricted version `LipschitzSmoothOnWith K f s` (with `s` a convex subset, parallel to the standard pattern for `ConvexOn`, `LipschitzOn`, etc.), and possibly broadening the base field / target away from `ℝ` (e.g. complex Hilbert spaces; vector-valued targets would require a different right-hand side and likely a separate predicate). The only unmerged upstream dependency is #39203, needed for the gradient-form characterisations. The base definition and the directional / Fréchet / 1D characterisations are independent of any unmerged work. - [ ] depends on: #39203 - [x] depends on: #14502 Diff for the changes *just* in this PR over its predecessor: [link](https://github.com/FordUniver/mathlib4/compare/refactor/gradient-ungate-inner-lemmas...feat/lipschitzSmooth-basic) t-analysis blocked-by-other-PR 344/10 Mathlib.lean,Mathlib/Analysis/Calculus/Gradient/Basic.lean,Mathlib/Analysis/Calculus/LipschitzSmooth/Basic.lean,Mathlib/Analysis/Calculus/LipschitzSmooth/Deriv.lean,Mathlib/Analysis/Calculus/LipschitzSmooth/FDeriv.lean,Mathlib/Analysis/Calculus/LipschitzSmooth/Gradient.lean 6 4 ['FordUniver', 'Komyyy', 'github-actions', 'mathlib-dependent-issues'] nobody
2-34929
2 days ago
3-29895
3 days ago
0-5994
1 hour
30230 CoolRmal
author:CoolRmal
 feat(MeasureTheory): the integral of a vector-valued function against a vector measure is additive Add some basic lemmas about the integral of a vector measure. This PR specifically focuses on the additivity of the integral. Created with the help of Codex. --- - [x] depends on: #28499 - [x] depends on: #39103 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor t-measure-probability awaiting-author 376/25 Mathlib/MeasureTheory/Integral/FinMeasAdditive.lean,Mathlib/MeasureTheory/Integral/SetToL1.lean,Mathlib/MeasureTheory/VectorMeasure/Basic.lean,Mathlib/MeasureTheory/VectorMeasure/Integral.lean 4 22 ['CoolRmal', 'EtienneC30', 'github-actions', 'mathlib-dependent-issues', 'mathlib4-merge-conflict-bot', 'yoh-tanimoto'] EtienneC30
assignee:EtienneC30
2-34339
2 days ago
2-34339
2 days ago
7-26208
7 days
39332 Michaillus
author:Michaillus
 chore(Topology/Spectral): Added two small lemmas chore(Topology/Spectral): Added two lemmas `IsCompact.isClosed_constructibleTopology_of_isOpen` `IsCompact.isClosed_constructibleTopology_of_isClosed` --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-topology new-contributor 12/0 Mathlib/Topology/Spectral/ConstructibleTopology.lean 1 7 ['Michaillus', 'github-actions', 'plp127', 'qawbecrdtey'] PatrickMassot
assignee:PatrickMassot
2-33836
2 days ago
9-1912
9 days ago
9-1623
9 days
33454 astrainfinita
author:astrainfinita
 feat: lemmas about `IsometryClass` --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-topology t-analysis awaiting-author merge-conflict 60/37 Mathlib/Analysis/Normed/Affine/Isometry.lean,Mathlib/Analysis/Normed/Group/Uniform.lean,Mathlib/Analysis/Normed/Operator/LinearIsometry.lean,Mathlib/Topology/MetricSpace/DilationEquiv.lean,Mathlib/Topology/MetricSpace/Isometry.lean 5 9 ['github-actions', 'j-loreaux', 'mathlib-merge-conflicts'] urkud
assignee:urkud
2-33494
2 days ago
136-7166
136 days ago
4-44581
4 days
37477 kebekus
author:kebekus
 feat: canonical decomposition of complex-meromorphic functions on disks Establish the Finite Canonical Decomposition of meromorphic functions, where a complex-meromorphic function `f` on a disk is written as a product of an analytic function without zeros and poles, and canonical factors that take only values of norm one on the boundary of the disk. A future PR will extend this theorem to handle zeros/poles on the boundary of the disk. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-analysis 354/12 Mathlib.lean,Mathlib/Algebra/Order/WithTop/Untop0.lean,Mathlib/Analysis/Complex/CanonicalDecomposition.lean,Mathlib/Analysis/Meromorphic/Divisor.lean,Mathlib/Analysis/Meromorphic/Order.lean,Mathlib/Analysis/Meromorphic/RCLike.lean,Mathlib/Topology/LocallyFinsupp.lean,Mathlib/Topology/MetricSpace/Pseudo/Defs.lean 8 25 ['github-actions', 'j-loreaux', 'kebekus'] j-loreaux
assignee:j-loreaux
2-33437
2 days ago
2-33437
2 days ago
50-58719
50 days
39483 hawkrobe
author:hawkrobe
 feat(RingTheory): cocommutative bialgebra structure on SymmetricAlgebra Adds the cocommutative coalgebra and bialgebra structure on `SymmetricAlgebra R M` following`MonoidAlgebra` precedent. --- ~~I originally tried to use `Bialgebra.ofAlgHom` but it doesn't make `Coalgebra.comul` defeq for `RingQuot`-built carriers (it looks like the underlying instances were `@[no_expose]` in #32861). So I used explicit `instance ... where` field assignment, then `Bialgebra` via `mk'`, instead.~~ I used Claude Code to help audit/polish this PR. (I've lurked for a long time so I did my best to closely follow conventions of other SymmetricAlgebra files but felt nervous about trying to upstream something stupid!) t-ring-theory new-contributor maintainer-merge 66/0 Mathlib.lean,Mathlib/LinearAlgebra/SymmetricAlgebra/Basic.lean,Mathlib/RingTheory/Bialgebra/SymmetricAlgebra.lean 3 29 ['YaelDillies', 'YanYablonovskiy', 'github-actions', 'hawkrobe', 'wwylele'] nobody
2-32992
2 days ago
3-19093
3 days ago
5-75944
5 days
38047 mbkybky
author:mbkybky
 feat(RingTheory/Finiteness/Ideal): `I` is finitely generated if `f(I)` and `I ∩ ker(f)` are finitely generated Let `f : R →+* S` be a surjective ring homomorphism, and let `I` be an ideal of `R`. If `f(I)` and `I ∩ ker(f)` are finitely generated ideals, then `I` is also finitely generated. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-ring-theory 10/3 Mathlib/RingTheory/Finiteness/Ideal.lean 1 1 ['github-actions'] mattrobball
assignee:mattrobball
2-30680
2 days ago
11-30272
11 days ago
37-65038
37 days
39614 sgouezel
author:sgouezel
 feat: if an L^p space is complete, so is its target space unless the measure is zero --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-measure-probability 174/1 Mathlib.lean,Mathlib/MeasureTheory/Function/LpSpace/Basic.lean,Mathlib/MeasureTheory/Function/LpSpace/CompleteOfCompleteLp.lean 3 2 ['github-actions', 'sgouezel'] nobody
2-29820
2 days ago
2-31075
2 days ago
2-31077
2 days
39225 junodeveloper
author:junodeveloper
 feat(SimpleGraph): add no-bridge theorem for even degree graphs This PR proves that a finite graph in which every vertex has even degree has no bridge. It adds: * `SimpleGraph.not_isBridge_of_even_degree` The proof argues by contradiction: if an edge is a bridge, delete it and look at the connected component containing one endpoint. In that component, the endpoint has odd degree, while any other odd-degree vertex would contradict the bridge assumption and the even-degree hypothesis. This contradicts the handshaking lemma via the existing odd-degree API. Local checks: ```bash lake build Mathlib.Combinatorics.SimpleGraph.Connectivity.EdgeConnectivity lake exe lint-style Mathlib.Combinatorics.SimpleGraph.Connectivity.EdgeConnectivity lake exe runLinter Mathlib.Combinatorics.SimpleGraph.Connectivity.EdgeConnectivity ``` ## AI usage disclosure I used OpenClaw/Codex while developing this PR. Much of the Lean proof of `not_isBridge_of_even_degree` was drafted with AI assistance, including API search and proof refactoring. I reviewed the generated code, made edits, ran the local checks above, and understand and take responsibility for the final statement and proof. t-combinatorics new-contributor large-import LLM-generated 122/0 Mathlib/Combinatorics/SimpleGraph/Connectivity/EdgeConnectivity.lean 1 12 ['Rida-Hamadani', 'SnirBroshi', 'github-actions', 'junodeveloper', 'linesthatinterlace'] nobody
2-28607
2 days ago
10-84582
10 days ago
10-84293
10 days
28613 espottesmith
author:espottesmith
 feat(Combinatorics): define undirected hypergraphs This PR defines undirected hypergraphs: ``` @[ext] structure Hypergraph (α : Type*) where /-- The vertex set -/ vertexSet : Set α /-- The hyperedge set -/ hyperedgeSet : Set (Set α) /-- All hyperedges must be subsets of the vertex set -/ hyperedge_isSubset_vertexSet : ∀ ⦃e⦄, e ∈ hyperedgeSet → e ⊆ vertexSet ``` In addition to the main definition, some additional definitions and related lemmas are provided: - vertex adjacency - hyperedge adjacency - vertex "stars" - special cases (loops, empty hypergraphs, trivial hypergraphs, complete hypergraphs, simple hypergraphs, k-uniform hypergraphs, and d-regular hypergraphs) - (some) hypergraph cardinality - subhypergraphs, induced subhypergraphs, and partial hypergraphs This implementation is certainly bare-bones. I'm submitting this PR at this point, rather than when my developments are more fleshed out, because there has been some interest in others contributing to hypergraph formalization in mathlib. In the near future, goals include: - defining incidence matrices (i.e., conversion from `Hypergraph α` to `Matrix α (Set α) β` - coersion/generalization of graph as 2-uniform hypergraph - conversion of a hypergraph into its associated clique graph/two-section graph - constructing the dual of a hypergraph (note: on first blush, this appears somewhat challenging, given that we define hyperedges as `Set α` rather than some other type `β`) - rank and co-rank - walks, paths, cycles, etc. on hypergraphs --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-combinatorics new-contributor 295/0 Mathlib.lean,Mathlib/Combinatorics/Hypergraph/Basic.lean 2 151 ['SnirBroshi', 'b-mehta', 'espottesmith', 'github-actions', 'jt496', 'lauramonk', 'mathlib4-merge-conflict-bot', 'tb65536'] b-mehta
assignee:b-mehta
2-28146
2 days ago
2-30191
2 days ago
98-4494
98 days
39607 TentativeConvert
author:TentativeConvert
 feat(Algebra/DirectSum): equivalence between direct sum indexed by ι₁ and double sum indexed by ι₂ and fibres of f : ι₁ → ι₂ 1. Add variant `equivCongrLeft'` of `equivCongrLeft`, and corresponding `…_apply` lemma. 2. Add `…_of lemmas` for both `equivCongrLeft` and `equivCongrLeft'`. 3. Add `…of lemma` for `sigmaCurry`, i.e. `sigmaCurry_of`. 4. Add `sigmaFiberAddEquiv`: the equivalence between a direct sum indexed by a type `ι₁` and the double sum indexed by a type `ι₂` and the fibres of a map `f : ι₁ → ι₂`. Add two `…_apply` lemmas and an `…_of` lemma. --- This is supposed to be a first step towards merging the draft PR #39356. re 1: Mathematically, I don't see why one version should be preferred over the other, but I found the existing `equivCongrLeft` more difficult to work with when the equivalence `h : ι ≃ κ` is naturally given in the opposite direction. (I could not avoid explicit type casts through the equality `h.symm.symm = h` when defining `sigmaFiberAddEquiv` in terms of `equivCongrLeft`.) Very unsure about the name of `equivCongrLeft'`. (I see that the name `equivCongrLeft` was chosen in analogy with `Equiv.piCongrLeft`. `Equiv.piCongrRight` looks very different, so presumably `equivCongrLeft'` should *not* be called `equivCongrRight`.) re 4: Very unsure about the naming of the two different `…_apply` lemmas; called them `…_apply` and `…_apply'` for now. The second (`…_apply'`) cannot be a `simp` lemma as it would prevent the first (`…_apply`) from firing. I've used Claude Opus for understanding error messages and git interaction, but everything is hand coded. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra new-contributor
label:t-algebra$
 66/1 Mathlib/Algebra/DirectSum/Basic.lean 1 3 ['github-actions'] nobody
2-27877
2 days ago
2-40430
2 days ago
2-41771
2 days
37697 IvanRenison
author:IvanRenison
 feat(Combinatorics/SimpleGraph/Clique): add theorems about cliques and induced graphs --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-combinatorics awaiting-author 22/0 Mathlib/Combinatorics/SimpleGraph/Clique.lean 1 10 ['Rida-Hamadani', 'SnirBroshi', 'YaelDillies', 'github-actions'] YaelDillies
assignee:YaelDillies
2-25293
2 days ago
2-25293
2 days ago
44-1357
44 days
39618 node0000
author:node0000
 feat(CategoryTheory/Subobject): Heyting algebra structure on Subobject in elementary topoi This PR provides the canonical `HeytingAlgebra (Subobject X)` instance for any category `C` satisfying the elementary-topos hypothesis bundle. Closes a gap in `Mathlib.CategoryTheory.Subobject.Lattice`: the `SemilatticeInf`, `SemilatticeSup`, `OrderTop`, `OrderBot`, and `Lattice` instances on `Subobject X` were already in place, but the Heyting-algebra structure that elementary topoi induce on the subobject lattice was missing. The construction follows Mac Lane and Moerdijk, *Sheaves in Geometry and Logic*, IV.6 Proposition 2: implication is the residual defined by an equalizer of characteristic morphisms, and the Galois connection `R ≤ residual P Q ↔ R ⊓ P ≤ Q` is the load-bearing identity that drives the `HeytingAlgebra` typeclass. ### What this PR adds A single new file `Mathlib/CategoryTheory/Subobject/Heyting.lean` containing: * `CategoryTheory.Subobject.residual : Subobject X → Subobject X → Subobject X` — the Heyting implication, defined as `Subobject.mk (equalizer.ι (χ (P ⊓ Q).arrow) (χ P.arrow))`. * `CategoryTheory.Subobject.le_residual_iff_inf_le` — the Galois connection `R ≤ residual P Q ↔ R ⊓ P ≤ Q`. * `CategoryTheory.Subobject.heytingAlgebra` — the `HeytingAlgebra (Subobject X)` instance, with `himp := residual`, `compl P := residual P ⊥`, `le_himp_iff := le_residual_iff_inf_le`, and `himp_bot := rfl`. Six private lemmas (`residual_E1`, `residual_E2`, `residual_E3` for the elimination half of the Galois connection; `residual_I1`, `residual_I2`, `residual_I3` for the introduction half) carry the proof; they are file-local and do not enter the public API. ### Hypothesis bundle ``` [HasSubobjectClassifier C] [HasPullbacks C] [HasEqualizers C] [HasInitial C] [HasImages C] [HasBinaryCoproducts C] [InitialMonoClass C] ``` These together are entailed by `C` being an elementary topos. Of these, `HasSubobjectClassifier` and `HasEqualizers` are the genuinely new requirements for the residual construction itself; the remainder enter via the existing `SemilatticeInf`, `SemilatticeSup`, `OrderTop`, and `OrderBot` instances on `Subobject X` that `HeytingAlgebra` extends. The per-lemma breakdown is given in the file's module docstring. ### Connection to existing API `Mathlib/CategoryTheory/Subobject/Lattice.lean` (Bhavik Mehta, Kim Morrison) already exhibits the `SemilatticeInf, SemilatticeSup, OrderTop, OrderBot, Lattice` instances on `Subobject X` under the corresponding limit/colimit hypotheses. This PR extends that chain to `HeytingAlgebra` using the new `HasSubobjectClassifier` typeclass introduced in `Mathlib/CategoryTheory/Subobject/Classifier/Defs.lean` (Charlie Conneen, Pablo Donato, Klaus Gy, 2024) and the equalizer infrastructure in `Mathlib/CategoryTheory/Limits/Shapes/Equalizers.lean`. Combined with the presheaf-topos classifier instance in `Mathlib.CategoryTheory.Topos.Sheaf` (`HasSubobjectClassifier (Cᵒᵖ ⥤ Type w)` for `EssentiallySmall.{w} C`), this gives the Heyting structure on any presheaf-topos subobject lattice automatically. ### Use of AI Per [Mathlib's AI-use policy](https://leanprover-community.github.io/contribute/index.html#use-of-ai), disclosing: the initial proof skeleton and the six bridging lemmas were drafted with the assistance of [Cursor](https://www.cursor.com/) running [Anthropic Claude](https://www.anthropic.com/claude) as the underlying model, during a multi-session co-working pass on a private formalization project. The author is the maintainer of the [FalseWork Papers project](https://github.com/thefalsework/papers), where this instance has been consumed by application-level theorems (`four_position_partition` and three other position-theory results) since Phase 3 of that project — providing a real downstream test of the construction. ### Testing * The instance resolves at the abstract level (an `inferInstance` smoke test under the topos hypothesis bundle exhibits this). * `himp_bot` discharges via `rfl` (the pseudo-complement is definitionally `residual P ⊥`); `le_himp_iff` is the Galois connection theorem assembled from the six bridging lemmas. * Downstream: in the FalseWork Papers project, the instance carries four position-theory theorems whose proofs are `LE.le.disjoint_compl_right`-style consequences of the Heyting structure, kernel-checked with `#print axioms` reporting only `[propext, Classical.choice, Quot.sound]`. * Users should depend on this instance via typeclass search rather than parameterizing over `[HeytingAlgebra (Subobject Y)]`, which can produce instance diamonds against the native `Subobject` order structure. ### Acknowledgments Thanks to **Edward van de Meent** and **Fernando Chu** for confirming the gap and discussing the construction's shape in [a #maths Zulip thread](https://leanprover.zulipchat.com/#narrow/channel/116395-maths/topic/HeytingAlgebra.20.28Subobject.20Y.29.20for.20elementary.20topoi/with/595655972) (2026-05). ### References * [MM92] S. Mac Lane and I. Moerdijk, *Sheaves in Geometry and Logic*, Springer, 1992. Chapter IV § 6, Proposition 2 (the residual construction) and Theorem 8 (subobject lattice is a Heyting algebra). t-category-theory new-contributor 247/0 Mathlib.lean,Mathlib/CategoryTheory/Subobject/Heyting.lean 2 2 ['github-actions'] nobody
2-24316
2 days ago
2-24402
2 days ago
2-24113
2 days
39608 EtienneC30
author:EtienneC30
 doc(Probability/HasLaw): mention `MeasurePreserving` in the docstring --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) documentation t-measure-probability 15/1 Mathlib/Probability/HasLaw.lean 1 5 ['EtienneC30', 'github-actions', 'jvanwinden'] nobody
2-23228
2 days ago
2-47940
2 days ago
2-47651
2 days
39619 dagurtomas
author:dagurtomas
 feat(CategoryTheory): the bicategory of profunctors --- - [ ] depends on: #38086 WIP blocked-by-other-PR 496/0 Mathlib.lean,Mathlib/CategoryTheory/Profunctor/Bicategory.lean,Mathlib/CategoryTheory/Profunctor/Comp.lean,Mathlib/Logic/Relation.lean 4 2 ['github-actions', 'mathlib-dependent-issues'] nobody
2-22759
2 days ago
2-22793
2 days ago
0-84
1 minute
38086 dagurtomas
author:dagurtomas
 feat(CategoryTheory): composition of profunctors --- - [x] depends on: #38085 - [x] depends on: #38382 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-category-theory 412/0 Mathlib.lean,Mathlib/CategoryTheory/Profunctor/Comp.lean,Mathlib/Logic/Relation.lean 3 11 ['dagurtomas', 'github-actions', 'mathlib-dependent-issues', 'robin-carlier'] robin-carlier
assignee:robin-carlier
2-22736
2 days ago
2-22736
2 days ago
7-84692
7 days
37766 chrisflav
author:chrisflav
 feat(AlgebraicGeometry): restriction of quasi-coherent sheaf is quasi-coherent --- - [ ] depends on: #37773 - [ ] depends on: #37775 - [ ] depends on: #38181 - [ ] depends on: #39592 - [ ] depends on: #39594 - [ ] depends on: #39595 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) WIP t-algebraic-geometry large-import blocked-by-other-PR 568/1 Mathlib/Algebra/Category/ModuleCat/Sheaf/Quasicoherent.lean,Mathlib/AlgebraicGeometry/Modules/Tilde.lean,Mathlib/AlgebraicGeometry/OpenImmersion.lean,Mathlib/CategoryTheory/Discrete/Basic.lean,Mathlib/CategoryTheory/Limits/Preorder.lean,Mathlib/CategoryTheory/Limits/Preserves/Basic.lean,Mathlib/CategoryTheory/Limits/Shapes/BinaryProducts.lean,Mathlib/CategoryTheory/Limits/Shapes/Pullback/IsPullback/Basic.lean,Mathlib/CategoryTheory/Sites/Continuous.lean,Mathlib/CategoryTheory/Sites/CoverPreserving.lean,Mathlib/CategoryTheory/Sites/Hypercover/One.lean 11 6 ['Brian-Nugent', 'github-actions', 'mathlib-dependent-issues', 'mathlib-merge-conflicts'] nobody
2-22546
2 days ago
45-15460
45 days ago
0-2
2 seconds
39236 quantumsnow
author:quantumsnow
 feat(AlgebraicTopology): `HomologyPretheory` for Eilenberg-Steenrod homology This splits out a part of #38369 into a separate PR. It includes a structure `TopPair.HomologyPretheory` containing the data for an Eilenberg-Steenrod homology theory and the first Eilenberg-Steenrod axiom as a typeclass `EilenbergSteenrod.IsHomotopyInvariant`. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebraic-topology new-contributor maintainer-merge awaiting-author 155/0 Mathlib.lean,Mathlib/AlgebraicTopology/EilenbergSteenrod.lean 2 37 ['chrisflav', 'dagurtomas', 'github-actions', 'joelriou', 'quantumsnow'] robin-carlier
assignee:robin-carlier
2-21402
2 days ago
2-21402
2 days ago
2-50409
2 days
39433 JovanGerb
author:JovanGerb
 feat(Tactic): `#click_suggestions` This is an initial PR for a point&click suggestion tool that can suggest theorems and tactics. This PR only implements theorem suggestions. This PR adds the `#click_suggestions` command that activates the tool. It could potentially in the future be active by default. The code is ported from this repository: https://github.com/JovanGerb/infoview_search TODO: import this feature in Tactic.Common This PR deletes `unfold?` in favour of the `#click_suggestions`. For backwards compatability, I have left `rw??` in place, but I plan to deprecate it in the future. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) file-removed t-meta awaiting-author 2151/120 Mathlib.lean,Mathlib/Tactic.lean,Mathlib/Tactic/ClickSuggestions.lean,Mathlib/Tactic/ClickSuggestions/Apply.lean,Mathlib/Tactic/ClickSuggestions/ApplyAt.lean,Mathlib/Tactic/ClickSuggestions/FindPremises.lean,Mathlib/Tactic/ClickSuggestions/GRewrite.lean,Mathlib/Tactic/ClickSuggestions/Rewrite.lean,Mathlib/Tactic/ClickSuggestions/SectionState.lean,Mathlib/Tactic/ClickSuggestions/TryPremises.lean,Mathlib/Tactic/ClickSuggestions/Unfold.lean,Mathlib/Tactic/ClickSuggestions/Util.lean,Mathlib/Tactic/Widget/LibraryRewrite.lean,MathlibTest/ClickSuggestions/Benchmark.lean,MathlibTest/ClickSuggestions/Test.lean,MathlibTest/ClickSuggestions/TestImpl.lean,MathlibTest/ClickSuggestions/Unfold.lean 17 18 ['JovanGerb', 'fpvandoorn', 'github-actions'] fpvandoorn
assignee:fpvandoorn
2-18076
2 days ago
4-47
3 days ago
0-12070
3 hours
39624 justus-springer
author:justus-springer
 feat(Algebra/MvPolynomial/PDeriv): a coefficient formula for `pderiv` This formula is useful for defining partial derivatives of multivariate power series, see PR #39626. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra
label:t-algebra$
 15/0 Mathlib/Algebra/MvPolynomial/PDeriv.lean 1 1 ['github-actions'] nobody
2-18054
2 days ago
2-18648
2 days ago
2-18359
2 days
39625 justus-springer
author:justus-springer
 feat(RingTheory/MvPowerSeries/Trunc): generalize truncation lemmas Generalize `coeff_trunc_mul_trunc_eq_coeff_mul` (and its analogs for `truncFinset` and `trunc'`) to allow for different truncation levels for the two arguments. This matches the API for univariate power series, where we already have `PowerSeries.coeff_mul_eq_coeff_trunc_mul_trunc₂`. This is useful for defining partial derivatives of multivariate power series, see PR #39626. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-ring-theory 39/7 Mathlib/RingTheory/MvPowerSeries/Trunc.lean 1 1 ['github-actions'] nobody
2-18036
2 days ago
2-18431
2 days ago
2-18142
2 days
37642 SnirBroshi
author:SnirBroshi
 chore(Combinatorics/SimpleGraph): tidy various files --- Concept inspired by @Ruben-VandeVelde :) [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-combinatorics maintainer-merge 74/62 Mathlib/Combinatorics/SimpleGraph/Coloring/VertexColoring.lean,Mathlib/Combinatorics/SimpleGraph/Copy.lean,Mathlib/Combinatorics/SimpleGraph/Extremal/Basic.lean,Mathlib/Combinatorics/SimpleGraph/IncMatrix.lean,Mathlib/Combinatorics/SimpleGraph/Maps.lean,Mathlib/Combinatorics/SimpleGraph/Trails.lean,Mathlib/Combinatorics/SimpleGraph/Walk/Decomp.lean,Mathlib/Combinatorics/SimpleGraph/Walk/Operations.lean,Mathlib/Combinatorics/SimpleGraph/Walk/Subwalks.lean 9 8 ['SnirBroshi', 'YaelDillies', 'github-actions'] nobody
2-17794
2 days ago
2-17870
2 days ago
47-16287
47 days
39622 kim-em
author:kim-em
 feat(CategoryTheory): add a grind propagator that normalizes morphism composition This PR adds a `grind` upward propagator on `CategoryTheory.CategoryStruct.comp` that, every time `grind` internalizes a composition `f ≫ g`, pushes the equality `f ≫ g = (right-associated form with syntactic identity factors removed)` back into the e-graph. The motivation is the Catalan blow-up of e-matching on `Category.assoc`: a chain of length `n` lets e-matching generate all Catalan(n − 1) parenthesizations as e-graph terms. Mathlib already has the runaway documented at `Mathlib/CategoryTheory/Iso.lean:146`. The propagator commits to a single canonical representative per fresh composition; the normalized form is a fixed point, so it never re-fires on the form it produces — the e-graph grows by O(1) terms per user-visible composition instead of Catalan-many. Notes: - The `@[grind =]` / `@[grind _=_]` attributes are removed from `Category.id_comp`, `Category.comp_id`, `Category.assoc` because the propagator subsumes them and they would re-introduce the blow-up. - `uliftCategory` in `Category/Basic.lean` now provides its three category axioms explicitly, since the `cat_disch` autoparam used to rely on the e-matching tags above and `Category/Basic.lean` runs before the propagator file is loaded. - The propagator is registered via `initialize` calling `registerBuiltinUpwardPropagator` directly. The `builtin_grind_propagator` macro can't be used downstream in `module`-mode mathlib (see https://github.com/leanprover/lean4/issues/13805) and `grind_propagator` (the user-facing form) is not yet implemented in lean4. - The normalizer is hand-written rather than reusing `Meta.Simp.main`, which has no IR body and crashes the interpreter when invoked from a `module`-mode downstream file. Tests in `MathlibTest/CategoryTheory/GrindCatNorm.lean` cover associativity, identity removal, mixed cases, hypotheses flowing through the normalizer, reducible-alias morphism types, and a long-chain heart-beat guard. Filed upstream tracking issue: https://github.com/leanprover/lean4/issues/13805 🤖 Prepared with Claude Code t-category-theory 186/2 Mathlib.lean,Mathlib/CategoryTheory/Category/Basic.lean,Mathlib/CategoryTheory/Tactic/GrindCatNorm.lean,MathlibTest/CategoryTheory/GrindCatNorm.lean 4 1 ['github-actions'] nobody
2-16765
2 days ago
unknown
0-0
0 seconds
35790 Brian-Nugent
author:Brian-Nugent
 feat(CategoryTheory/AlgebraicGeometry): Flasque Sheaves have vanishing cohomology Proves cohomology vanishing for flasque sheaves. --- - [x] depends on: #34742 - [x] depends on: #34267 - [x] depends on: #35785 - [ ] depends on: #36218 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) large-import blocked-by-other-PR 367/2 Mathlib.lean,Mathlib/Algebra/Homology/ShortComplex/Exact.lean,Mathlib/Algebra/Homology/SpectralObject/Page.lean,Mathlib/CategoryTheory/ComposableArrows/Basic.lean,Mathlib/CategoryTheory/Sites/SheafCohomology/ExactSequences.lean,Mathlib/Topology/Sheaves/AddCommGrpCat.lean,Mathlib/Topology/Sheaves/Flasque.lean,Mathlib/Topology/Sheaves/Sheaf.lean 8 10 ['Brian-Nugent', 'github-actions', 'mathlib-dependent-issues', 'mathlib-merge-conflicts', 'smorel394'] dagurtomas
assignee:dagurtomas
2-14566
2 days ago
85-75643
85 days ago
0-23
23 seconds
39626 justus-springer
author:justus-springer
 feat(RingTheory/MvPowerSeries): partial derivatives of `MvPowerSeries` Previously, we had formal derivatives for `PowerSeries` and `Polynomial` and formal partial derivatives for `MvPolynomial`, but no formal partial derivatives for `MvPowerSeries`. This PR adds them. Furthermore, `PowerSeries.derivative` is refactored to be defined in terms of `MvPowerSeries.pderiv`, which reduces code duplication (In particular, there is no need to define the bare function `PowerSeries.derivativeFun` anymore). Most proofs are direct generalizations from the univariate case. I only had to add a few missing API lemmas, which I am PR'ing separately below: - [ ] depends on: #39623 - [ ] depends on: #39624 - [ ] depends on: #39625 --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-ring-theory blocked-by-other-PR 385/139 Mathlib.lean,Mathlib/Algebra/MvPolynomial/Basic.lean,Mathlib/Algebra/MvPolynomial/PDeriv.lean,Mathlib/RingTheory/MvPowerSeries/Basic.lean,Mathlib/RingTheory/MvPowerSeries/Derivative.lean,Mathlib/RingTheory/MvPowerSeries/Trunc.lean,Mathlib/RingTheory/PowerSeries/Derivative.lean,Mathlib/RingTheory/PowerSeries/Exp.lean 8 2 ['github-actions', 'mathlib-dependent-issues'] nobody
2-13998
2 days ago
2-17048
2 days ago
0-1053
17 minutes
39553 Brian-Nugent
author:Brian-Nugent
 feat(Algebra/CategoryTheory/ModuleCat): Locally Free is local We define `SheafOfModules.LocalGeneratorsData.bind` just like `SheafOfModules.QuasicoherentData.bind` and use it to show that being locally free is a local condition. --- - [ ] depends on: #39544 - [ ] depends on: #39399 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra blocked-by-other-PR
label:t-algebra$
 267/6 Mathlib.lean,Mathlib/Algebra/Category/ModuleCat/Sheaf/Generators.lean,Mathlib/Algebra/Category/ModuleCat/Sheaf/LocallyFree.lean,Mathlib/Algebra/Category/ModuleCat/Sheaf/Quasicoherent.lean 4 2 ['github-actions', 'mathlib-dependent-issues'] nobody
2-13884
2 days ago
4-3272
4 days ago
0-1165
19 minutes
38018 matthewjasper
author:matthewjasper
 feat(Algebra): expand Subalgebra.restrictScalars API Add an instance for the original algebra structure, the implied scalar tower instances, and the algebra equivalence with the original subalgebra. Use this to remove some `set_option backward.isDefEq.respectTransparency`. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-ring-theory 53/14 Mathlib/Algebra/Algebra/Subalgebra/Tower.lean,Mathlib/RingTheory/AlgebraicIndependent/TranscendenceBasis.lean,Mathlib/RingTheory/Finiteness/Basic.lean,Mathlib/RingTheory/IntegralClosure/IsIntegralClosure/Basic.lean 4 5 ['eric-wieser', 'github-actions', 'leanprover-radar', 'mariainesdff'] mariainesdff
assignee:mariainesdff
2-11673
2 days ago
39-1281
39 days ago
39-2609
39 days
26975 Whysoserioushah
author:Whysoserioushah
 feat: a norm_num extension for complex numbers co-authored-by : @thefundamentaltheor3m, @hrmacbeth --- * depends on: #39628 * depends on: #39620 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-meta 444/14 Mathlib.lean,Mathlib/Analysis/RCLike/Basic.lean,Mathlib/Data/Complex/Basic.lean,Mathlib/Tactic.lean,Mathlib/Tactic/NormNum/Core.lean,Mathlib/Tactic/NormNum/Eq.lean,Mathlib/Tactic/NormNum/NormNumI.lean,Mathlib/Tactic/NormNum/OfScientific.lean,Mathlib/Tactic/NormNum/Result.lean,MathlibTest/norm_numI.lean 10 75 ['JovanGerb', 'Vierkantor', 'Whysoserioushah', 'dupuisf', 'eric-wieser', 'github-actions', 'grunweg', 'hrmacbeth', 'mathlib4-merge-conflict-bot'] eric-wieser
assignee:eric-wieser
2-11553
2 days ago
2-10092
2 days ago
112-30556
112 days
39476 faenuccio
author:faenuccio
 feat(Mathlib.Topology.Algebra.Module.Equiv): add results on IsHomeomorph Add the construction of a `ContinuousLinearEquiv` from a `LinearEquiv` that `IsHomeomorph`, and two basic API lemmas. Also remove a `simp` tag from a lemma in about `Function.Bijective`, and change its signature a bit. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-topology awaiting-author 56/21 Mathlib/Logic/Equiv/Defs.lean,Mathlib/Topology/Algebra/Module/Equiv.lean 2 16 ['ADedecker', 'faenuccio', 'github-actions'] ADedecker
assignee:ADedecker
2-10719
2 days ago
2-49552
2 days ago
2-5083
2 days
35548 gasparattila
author:gasparattila
 fix(fun_prop): do not unfold semireducible definitions in the presence of projections --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-meta 44/58 Mathlib/Condensed/Light/TopCatAdjunction.lean,Mathlib/Condensed/TopCatAdjunction.lean,Mathlib/LinearAlgebra/Matrix/GeneralLinearGroup/Defs.lean,Mathlib/MeasureTheory/MeasurableSpace/Embedding.lean,Mathlib/Tactic/FunProp/FunctionData.lean,Mathlib/Tactic/FunProp/Mor.lean,Mathlib/Tactic/FunProp/Types.lean,Mathlib/Topology/Algebra/AffineSubspace.lean,Mathlib/Topology/Algebra/ContinuousAffineEquiv.lean,Mathlib/Topology/Algebra/Field.lean,Mathlib/Topology/Algebra/Group/Matrix.lean,Mathlib/Topology/Algebra/Module/Equiv.lean,Mathlib/Topology/Algebra/Module/Spaces/WeakBilin.lean,Mathlib/Topology/Category/TopCat/Limits/Basic.lean,Mathlib/Topology/Constructions/SumProd.lean,Mathlib/Topology/Path.lean,MathlibTest/FunPropMinimal.lean 17 8 ['DavidLedvinka', 'JovanGerb', 'github-actions', 'j-loreaux', 'lecopivo', 'mathlib-merge-conflicts'] nobody
2-6858
2 days ago
unknown
0-0
0 seconds
39628 eric-wieser
author:eric-wieser
 feat: add `ofScientific` lemmas for `Complex`/`RCLike`/`Quaternion` --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-data easy 32/0 Mathlib/Algebra/Quaternion.lean,Mathlib/Analysis/RCLike/Basic.lean,Mathlib/Data/Complex/Basic.lean 3 2 ['eric-wieser', 'github-actions'] nobody
2-4287
2 days ago
2-4266
2 days ago
2-12149
2 days
39422 eric-wieser
author:eric-wieser
 feat: add congruence lemmas for (d)finsupp big operators Also adds the missing n-ary product lemmas to match the existing sum lemmas. Co-authored-by: Antoine Chambert-Loir --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra large-import maintainer-merge
label:t-algebra$
 166/1 Mathlib/Algebra/BigOperators/Finsupp/Basic.lean,Mathlib/Data/DFinsupp/BigOperators.lean,Mathlib/GroupTheory/Congruence/BigOperators.lean,Mathlib/RingTheory/Congruence/BigOperators.lean,Mathlib/RingTheory/TwoSidedIdeal/BigOperators.lean 5 19 ['AntoineChambert-Loir', 'YaelDillies', 'eric-wieser', 'github-actions'] nobody
2-2632
2 days ago
7-1469
7 days ago
7-13052
7 days
37523 matthewjasper
author:matthewjasper
 feat: elements of Dedekind domain approximate elements of valuation ring Algebra part of showing that `R` is dense in `O_v` which is used to show that `R / v` is isomorphic to the residue field of `O_v` and construct the base change isomorphism for finite adeles. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-ring-theory 87/11 Mathlib/Algebra/Order/GroupWithZero/Canonical.lean,Mathlib/RingTheory/DedekindDomain/AdicValuation.lean 2 5 ['github-actions', 'mathlib-merge-conflicts', 'riccardobrasca'] riccardobrasca
assignee:riccardobrasca
2-2259
2 days ago
2-2334
2 days ago
47-45275
47 days
39487 ADedecker
author:ADedecker
 chore: switch `EqLocus` from `LinearMapClass` to `LinearMap` --- Note: this PR was opened at 35000 feet :slightly_smiling_face: [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra
label:t-algebra$
 18/14 Mathlib/Algebra/Algebra/Subalgebra/Basic.lean,Mathlib/Algebra/Module/Submodule/EqLocus.lean,Mathlib/Analysis/InnerProductSpace/MeanErgodic.lean,Mathlib/Topology/Algebra/Module/ContinuousLinearMap/Basic.lean 4 10 ['ADedecker', 'b-mehta', 'github-actions', 'j-loreaux', 'themathqueen'] nobody
2-1407
2 days ago
2-42947
2 days ago
5-14513
5 days
39493 ADedecker
author:ADedecker
 chore: switch `AlgHom.equalizer` from `AlgHomClass` to `AlgHom` --- - [ ] depends on: #39487 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) blocked-by-other-PR 29/31 Mathlib/Algebra/Algebra/Subalgebra/Basic.lean,Mathlib/Algebra/Algebra/Subalgebra/Lattice.lean,Mathlib/Algebra/Module/Submodule/EqLocus.lean,Mathlib/Analysis/InnerProductSpace/MeanErgodic.lean,Mathlib/Topology/Algebra/Algebra.lean,Mathlib/Topology/Algebra/Module/ContinuousLinearMap/Basic.lean 6 2 ['github-actions', 'mathlib-dependent-issues'] nobody
2-1121
2 days ago
5-66638
5 days ago
0-1151
19 minutes
39495 hawkrobe
author:hawkrobe
 feat(Data/Multiset/Antidiagonal): two structural lemmas Adds `map_swap_antidiagonal` and `antidiagonal_add`. --- Fills out the API parallel to `Multiset.Nat.map_swap_antidiagonal` and `Finset.map_swap_antidiagonal`. (And adds `@[congr]` to `bind_congr`.) Used downstream for shuffle-coproduct constructions. (#7486, I found this old [Zulip thread](https://leanprover.zulipchat.com/#narrow/channel/144837-PR-reviews/topic/antidiagonals.20having.20multiplicity.20.237595/near/238573473)) I used Claude Code to audit and polish. t-data new-contributor 22/0 Mathlib/Data/Multiset/Antidiagonal.lean,Mathlib/Data/Multiset/Bind.lean 2 6 ['github-actions', 'hawkrobe', 'j-loreaux'] nobody
1-84570
1 day ago
2-33372
2 days ago
5-14075
5 days
39623 justus-springer
author:justus-springer
 feat(Algebra/MvPolynomial/Basic): `coeff_C_of_ne_zero` and `coeff_add_single_C` These lemmas are multivariate analogs to `Polynomial.coeff_C_of_ne_zero`, `Polynomial.coeff_C_succ` and `PowerSeries.coeff_C_of_ne_zero` and `PowerSeries.coeff_succ_C`. They are useful for defining partial derivatives for multivariate power series, see PR #39626. - [x] depends on: #39632 --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-ring-theory 16/0 Mathlib/Algebra/MvPolynomial/Basic.lean,Mathlib/RingTheory/MvPowerSeries/Basic.lean 2 5 ['github-actions', 'justus-springer', 'mathlib-dependent-issues', 'wwylele'] nobody
1-83820
1 day ago
1-83936
1 day ago
2-12459
2 days
33505 urkud
author:urkud
 feat(Analysis/Complex): prove Riemann mapping theorem I'll list dependencies later. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict 974/1 Mathlib/Analysis/Complex/RiemannMapping.lean,Mathlib/Analysis/Complex/UnitDisc/Shift.lean,Mathlib/Topology/Algebra/Group/CompactOpen.lean 3 9 ['SnirBroshi', 'github-actions', 'mathlib-merge-conflicts', 'mathlib4-merge-conflict-bot', 'urkud'] nobody
1-79951
1 day ago
unknown
0-0
0 seconds
34941 urkud
author:urkud
 feat(FDeriv/Prod): generalize to TVS --- Doesn't work yet - [ ] depends on: #34867 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) blocked-by-other-PR t-analysis merge-conflict 326/178 Mathlib/Analysis/BoxIntegral/DivergenceTheorem.lean,Mathlib/Analysis/Calculus/FDeriv/Bilinear.lean,Mathlib/Analysis/Calculus/FDeriv/Comp.lean,Mathlib/Analysis/Calculus/FDeriv/CompCLM.lean,Mathlib/Analysis/Calculus/FDeriv/ContinuousAlternatingMap.lean,Mathlib/Analysis/Calculus/FDeriv/Linear.lean,Mathlib/Analysis/Calculus/FDeriv/Mul.lean,Mathlib/Analysis/Calculus/FDeriv/Prod.lean,Mathlib/MeasureTheory/Integral/DivergenceTheorem.lean,Mathlib/Topology/Algebra/Module/LinearMapPiProd.lean 10 4 ['github-actions', 'mathlib-dependent-issues', 'mathlib-merge-conflicts'] nobody
1-78511
1 day ago
104-57792
104 days ago
0-50
50 seconds
35666 urkud
author:urkud
 chore(Calculus/FDeriv/Pi): migrate to TVS --- - [ ] depends on: #35663 - [ ] depends on: #34941 - [ ] depends on: #34867 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) blocked-by-other-PR merge-conflict 330/179 Mathlib/Analysis/BoxIntegral/DivergenceTheorem.lean,Mathlib/Analysis/Calculus/FDeriv/Bilinear.lean,Mathlib/Analysis/Calculus/FDeriv/Comp.lean,Mathlib/Analysis/Calculus/FDeriv/CompCLM.lean,Mathlib/Analysis/Calculus/FDeriv/ContinuousAlternatingMap.lean,Mathlib/Analysis/Calculus/FDeriv/Linear.lean,Mathlib/Analysis/Calculus/FDeriv/Mul.lean,Mathlib/Analysis/Calculus/FDeriv/Pi.lean,Mathlib/Analysis/Calculus/FDeriv/Prod.lean,Mathlib/MeasureTheory/Integral/DivergenceTheorem.lean,Mathlib/Topology/Algebra/Module/LinearMapPiProd.lean 11 5 ['github-actions', 'mathlib-dependent-issues', 'mathlib-merge-conflicts'] nobody
1-78387
1 day ago
88-76091
88 days ago
0-827
13 minutes
36878 plp127
author:plp127
 chore: override `npow` in compositional monoids If `FooHom` is the type of foo homomorphisms, then `FooHom A A` naturally gets the structure of a monoid by setting one to be the identity homomorphism and setting multiplication to be composition. This PR overrides the `npow` field of this `Monoid` to have `f ^ n` be definitionally equal to `f^[n]`. `FooEquiv A A` also naturally gets a group structure in the same way, this PR overrides the `npow` field to have `f ^ n` be definitionally equal to `f^[n]` and to have `f ^ (n + 1)` be definitionally equal to `f ^ n * f`. This does break one pre-existing definitional equality: when `e : Equiv.Perm α`, `e⁻¹ ^ n = (e ^ n)⁻¹` will no longer be definitional. This PR also sets the `zpow` field of `Group (FooEquiv A A)` instances to `zpowRec (npow := fun n f => f ^ n)`. In the future we may want to change this so that `(f ^ n).toEquiv` is definitionally equal to `f.toEquiv ^ n`. The monoid and group instances to modify are found by searching loogle for `"one_apply"`. The motivation is to make natural number powers commute definitionally with the coercion from `AlgEquiv` to `LinearMap`. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict 211/66 Mathlib/Algebra/AddConstMap/Equiv.lean,Mathlib/Algebra/Algebra/Equiv.lean,Mathlib/Algebra/Algebra/Hom.lean,Mathlib/Algebra/Group/End.lean,Mathlib/Algebra/Group/Hom/Defs.lean,Mathlib/Algebra/Module/LinearMap/End.lean,Mathlib/Algebra/Order/Group/End.lean,Mathlib/Algebra/Ring/Aut.lean,Mathlib/Algebra/Ring/Hom/Defs.lean,Mathlib/Algebra/Star/MonoidHom.lean,Mathlib/Algebra/Star/StarAlgHom.lean,Mathlib/Algebra/Star/StarRingHom.lean,Mathlib/GroupTheory/Perm/Cycle/Basic.lean,Mathlib/RingTheory/Bialgebra/Hom.lean,Mathlib/RingTheory/Coalgebra/Hom.lean,Mathlib/Topology/Algebra/Algebra.lean,Mathlib/Topology/Algebra/Module/LinearMap.lean 17 4 ['eric-wieser', 'github-actions', 'mathlib-merge-conflicts', 'plp127'] nobody
1-78264
1 day ago
63-71232
63 days ago
0-2503
41 minutes
38036 JovanGerb
author:JovanGerb
 feat: `NSMul`/`NPow` type class This PR is adds `NSMul`, `NPow`, `ZSMul` and `ZPow` classes for the `nsmul`, `npow`, `zsmul`, `zpow` data fields. This has a few advantages: - If you first declare a `SMul` instance, then you don't need to manually write `nsmul := (· • ·)` and `zsmul := (· • ·)` . For `Pow`, the extra benefit is that inferring the instance is preferred over the default field `npowRecAuto`. So this helps avoid accidental diamonds. - If you first declare a `SMul` instance on a type synonym, then `inferInstanceAs` will infer the `nsmul` field from the `SMul` instance. This makes it easier to avoid diamonds on type synonyms like `Matrix` and `MonoidAlgebra`. - The not-yet-merged instance diamond linter will be able to detect cases where the `NSMul` and `SMul` classes do not agree. In the process of making this PR, I have identified two existing `NPow` diamonds: - In `Mathlib.Algebra.Order.Positive.Field`, there were two conflicting `NPow` instances. - For `Fin`, there are two conflicting `NPow` instances. I have overwritten the one in core lean with the one from mathlib that is more computationally efficient. TODO: the same for `QSMul` and `NNQSMul`. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict 276/273 Mathlib/Algebra/Colimit/DirectLimit.lean,Mathlib/Algebra/FreeAlgebra.lean,Mathlib/Algebra/Group/Action/Opposite.lean,Mathlib/Algebra/Group/Defs.lean,Mathlib/Algebra/Group/Ext.lean,Mathlib/Algebra/Group/Int/Defs.lean,Mathlib/Algebra/Group/Opposite.lean,Mathlib/Algebra/Group/Prod.lean,Mathlib/Algebra/Group/Submonoid/Membership.lean,Mathlib/Algebra/Group/TypeTags/Basic.lean,Mathlib/Algebra/Group/Units/Defs.lean,Mathlib/Algebra/GroupWithZero/Action/Opposite.lean,Mathlib/Algebra/Module/NatInt.lean,Mathlib/Algebra/MonoidAlgebra/Defs.lean,Mathlib/Algebra/Order/Monoid/Unbundled/WithTop.lean,Mathlib/Algebra/Order/Positive/Field.lean,Mathlib/Algebra/Order/Ring/Archimedean.lean,Mathlib/Algebra/Order/Ring/WithTop.lean,Mathlib/Algebra/Ring/MinimalAxioms.lean,Mathlib/Algebra/RingQuot.lean,Mathlib/CategoryTheory/Triangulated/Basic.lean,Mathlib/Data/BitVec.lean,Mathlib/Data/Complex/Basic.lean,Mathlib/Data/Rat/Defs.lean,Mathlib/Data/ZMod/Defs.lean,Mathlib/Data/ZMod/IntUnitsPower.lean,Mathlib/FieldTheory/RatFunc/Basic.lean,Mathlib/GroupTheory/GroupAction/Hom.lean,Mathlib/LinearAlgebra/Matrix/Defs.lean,Mathlib/LinearAlgebra/Matrix/ZPow.lean,Mathlib/LinearAlgebra/TensorProduct/Basic.lean,Mathlib/LinearAlgebra/TensorProduct/Defs.lean,Mathlib/NumberTheory/ArithmeticFunction/Defs.lean,Mathlib/RingTheory/PolynomialLaw/Basic.lean,Mathlib/RingTheory/Valuation/ValuativeRel/Basic.lean,Mathlib/SetTheory/Cardinal/Order.lean,Mathlib/Tactic/Abel.lean,Mathlib/Tactic/Translate/ToAdditive.lean,Mathlib/Topology/Algebra/GroupCompletion.lean,Mathlib/Topology/Algebra/Module/LinearMap.lean,MathlibTest/instance_diamonds.lean 41 17 ['JovanGerb', 'eric-wieser', 'github-actions', 'jcommelin', 'leanprover-radar', 'mathlib-merge-conflicts', 'vihdzp'] nobody
1-78261
1 day ago
1-78262
1 day ago
29-38312
29 days
38637 FLDutchmann
author:FLDutchmann
 test(Tactic/Algebra): try to replace `ring` with algebra in many places --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) large-import merge-conflict 497/89 Mathlib/Algebra/AddConstMap/Basic.lean,Mathlib/Algebra/AddConstMap/Equiv.lean,Mathlib/Algebra/Algebra/Hom.lean,Mathlib/Algebra/Algebra/IsSimpleRing.lean,Mathlib/Algebra/CharP/Lemmas.lean,Mathlib/Algebra/ContinuedFractions/Computation/CorrectnessTerminating.lean,Mathlib/Algebra/Order/Archimedean/Basic.lean,Mathlib/Algebra/Order/Archimedean/Hom.lean,Mathlib/Algebra/Order/Archimedean/Submonoid.lean,Mathlib/Algebra/Polynomial/DenomsClearable.lean,Mathlib/Algebra/Polynomial/Homogenize.lean,Mathlib/Algebra/Polynomial/PartialFractions.lean,Mathlib/Analysis/Normed/Group/Seminorm.lean,Mathlib/Data/Complex/Basic.lean,Mathlib/Data/ENNReal/Basic.lean,Mathlib/Data/ENNReal/Inv.lean,Mathlib/Data/ENNReal/Operations.lean,Mathlib/Data/ENNReal/Real.lean,Mathlib/Data/Int/WithZero.lean,Mathlib/Data/NNRat/Floor.lean,Mathlib/Data/NNReal/Star.lean,Mathlib/Data/Nat/Digits/Defs.lean,Mathlib/Data/Nat/Totient.lean,Mathlib/Data/Rat/Floor.lean,Mathlib/Data/Real/Archimedean.lean,Mathlib/Data/Real/ENatENNReal.lean,Mathlib/Data/Real/Pointwise.lean,Mathlib/GroupTheory/Archimedean.lean,Mathlib/GroupTheory/Perm/Fin.lean,Mathlib/LinearAlgebra/Basis/Submodule.lean,Mathlib/LinearAlgebra/Vandermonde.lean,Mathlib/NumberTheory/ClassNumber/AdmissibleAbs.lean,Mathlib/NumberTheory/ModularForms/EisensteinSeries/QExpansion.lean,Mathlib/NumberTheory/NumberField/Discriminant/Basic.lean,Mathlib/RingTheory/Derivation/ToSquareZero.lean,Mathlib/RingTheory/Nilpotent/Exp.lean,Mathlib/RingTheory/Polynomial/Pochhammer.lean,Mathlib/Tactic/Algebra/Basic.lean,Mathlib/Tactic/Algebra/Lemmas.lean,Mathlib/Tactic/Linter/FlexibleLinter.lean,Mathlib/Tactic/Ring.lean,Mathlib/Tactic/Ring/Common.lean,Mathlib/Topology/Algebra/Nonarchimedean/Bases.lean,Mathlib/Topology/MetricSpace/Defs.lean,MathlibTest/Algebra.lean 45 17 ['FLDutchmann', 'github-actions', 'leanprover-radar', 'mathlib-merge-conflicts'] nobody
1-78258
1 day ago
unknown
0-0
0 seconds
39100 ADedecker
author:ADedecker
 feat: operators which are strict and with closed range are stable under finite rank perturbation --- - [x] depends on: #38579 - [x] depends on: #39260 - [x] depends on: #39344 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-topology awaiting-author merge-conflict 482/0 Mathlib.lean,Mathlib/Analysis/Normed/Operator/Perturbation/StrictByFinite.lean,Mathlib/Topology/Algebra/Module/LinearMap.lean 3 6 ['ADedecker', 'github-actions', 'j-loreaux', 'mathlib-dependent-issues', 'mathlib-merge-conflicts'] nobody
1-78255
1 day ago
3-14726
3 days ago
0-2900
48 minutes
39102 yuanyi-350
author:yuanyi-350
 chore: reduce imports in 50 files --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-analysis merge-conflict 70/81 Mathlib/Analysis/BoxIntegral/Box/Basic.lean,Mathlib/Analysis/BoxIntegral/Box/SubboxInduction.lean,Mathlib/Analysis/BoxIntegral/DivergenceTheorem.lean,Mathlib/Analysis/Calculus/Taylor.lean,Mathlib/Analysis/Calculus/UniformLimitsDeriv.lean,Mathlib/Analysis/Distribution/DerivNotation.lean,Mathlib/Analysis/Distribution/SchwartzSpace/Basic.lean,Mathlib/Analysis/Distribution/SchwartzSpace/Deriv.lean,Mathlib/Analysis/Distribution/Sobolev.lean,Mathlib/Analysis/LocallyConvex/AbsConvex.lean,Mathlib/Analysis/LocallyConvex/Barrelled.lean,Mathlib/Analysis/LocallyConvex/ContinuousOfBounded.lean,Mathlib/Analysis/LocallyConvex/Montel.lean,Mathlib/Analysis/LocallyConvex/PointwiseConvergence.lean,Mathlib/Analysis/LocallyConvex/SeparatingDual.lean,Mathlib/Analysis/LocallyConvex/WeakDual.lean,Mathlib/Analysis/LocallyConvex/WeakOperatorTopology.lean,Mathlib/Analysis/LocallyConvex/WeakSpace.lean,Mathlib/Analysis/Meromorphic/Divisor.lean,Mathlib/Analysis/Normed/Affine/AddTorsor.lean,Mathlib/Analysis/Normed/Affine/AddTorsorBases.lean,Mathlib/Analysis/Normed/Affine/Convex.lean,Mathlib/Analysis/Normed/Algebra/Basic.lean,Mathlib/Analysis/Normed/Algebra/Exponential.lean,Mathlib/Analysis/Normed/Algebra/MatrixExponential.lean,Mathlib/Analysis/Normed/Algebra/QuaternionExponential.lean,Mathlib/Analysis/Normed/Algebra/UnitizationL1.lean,Mathlib/Analysis/Normed/Field/Dense.lean,Mathlib/Analysis/Normed/Field/Instances.lean,Mathlib/Analysis/Normed/Field/Ultra.lean,Mathlib/Analysis/Normed/Group/AddCircle.lean,Mathlib/Analysis/Normed/Group/Bounded.lean,Mathlib/Analysis/Normed/Group/ControlledClosure.lean,Mathlib/Analysis/Normed/Group/FunctionSeries.lean,Mathlib/Analysis/Normed/Group/Indicator.lean,Mathlib/Analysis/Normed/Group/NullSubmodule.lean,Mathlib/Analysis/Normed/Group/Tannery.lean,Mathlib/Analysis/Normed/Group/Ultra.lean,Mathlib/Analysis/Normed/Lp/WithLp.lean,Mathlib/Analysis/Normed/MulAction.lean,Mathlib/Analysis/ODE/PicardLindelof.lean,Mathlib/Analysis/ODE/Transform.lean,Mathlib/Analysis/Oscillation.lean,Mathlib/Analysis/PSeriesComplex.lean,Mathlib/Analysis/SpecificLimits/Fibonacci.lean,Mathlib/Analysis/SpecificLimits/FloorPow.lean,Mathlib/Analysis/Subadditive.lean,Mathlib/Analysis/SumIntegralComparisons.lean 48 13 ['JovanGerb', 'YaelDillies', 'bryangingechen', 'github-actions', 'j-loreaux', 'leanprover-radar', 'mathlib-merge-conflicts', 'yuanyi-350'] j-loreaux
assignee:j-loreaux
1-78254
1 day ago
1-78255
1 day ago
11-63042
11 days
39155 mathlib-nolints
author:mathlib-nolints
 chore: lake shake --add-public --keep-implied --keep-prefix --fix I am happy to shake some imports for you! **381 files changed** · +406 imports added · -346 imports removed --- [workflow run for this PR](https://github.com/leanprover-community/mathlib4/actions/runs/26001831423) [explain.txt](https://github.com/leanprover-community/mathlib4/actions/runs/26001831423/artifacts/7045805363) large-import merge-conflict 406/346 Mathlib/Algebra/Algebra/Unitization.lean,Mathlib/Algebra/BigOperators/Finprod.lean,Mathlib/Algebra/BigOperators/Group/List/Basic.lean,Mathlib/Algebra/BigOperators/Intervals.lean,Mathlib/Algebra/Category/MonCat/Colimits.lean,Mathlib/Algebra/Category/MonCat/FilteredColimits.lean,Mathlib/Algebra/Category/Ring/Topology.lean,Mathlib/Algebra/Free.lean,Mathlib/Algebra/Group/Conj.lean,Mathlib/Algebra/Group/Subgroup/Basic.lean,Mathlib/Algebra/Group/Subgroup/Ker.lean,Mathlib/Algebra/Group/Submonoid/Saturation.lean,Mathlib/Algebra/Group/Submonoid/Support.lean,Mathlib/Algebra/Group/Units/Basic.lean,Mathlib/Algebra/Homology/DerivedCategory/Ext/Map.lean,Mathlib/Algebra/Homology/DerivedCategory/Ext/MapBijective.lean,Mathlib/Algebra/Homology/HomologicalComplexAbelian.lean,Mathlib/Algebra/Homology/ModelCategory/Injective.lean,Mathlib/Algebra/Homology/ModelCategory/Lifting.lean,Mathlib/Algebra/Lie/CartanCriterion.lean,Mathlib/Algebra/LinearRecurrence.lean,Mathlib/Algebra/Module/Injective.lean,Mathlib/Algebra/Module/SpanRank.lean,Mathlib/Algebra/Module/Submodule/Invariant.lean,Mathlib/Algebra/Module/Submodule/Pointwise.lean,Mathlib/Algebra/MonoidAlgebra/Defs.lean,Mathlib/Algebra/MvPolynomial/Cardinal.lean,Mathlib/Algebra/MvPolynomial/Division.lean,Mathlib/Algebra/MvPolynomial/Equiv.lean,Mathlib/Algebra/MvPolynomial/Funext.lean,Mathlib/Algebra/MvPolynomial/Nilpotent.lean,Mathlib/Algebra/NonAssoc/PreLie/Basic.lean,Mathlib/Algebra/Order/Archimedean/Class.lean,Mathlib/Algebra/Order/Archimedean/Submonoid.lean,Mathlib/Algebra/Order/BigOperators/GroupWithZero/Finset.lean,Mathlib/Algebra/Order/CauSeq/BigOperators.lean,Mathlib/Algebra/Order/Field/Pointwise.lean,Mathlib/Algebra/Order/Group/Indicator.lean,Mathlib/Algebra/Order/Monoid/Canonical/Defs.lean,Mathlib/Algebra/Order/Ring/Archimedean.lean,Mathlib/Algebra/Order/Ring/Cast.lean,Mathlib/Algebra/Order/SuccPred.lean,Mathlib/Algebra/Polynomial/Eval/Coeff.lean,Mathlib/Algebra/Regular/Defs.lean,Mathlib/Algebra/Tropical/Basic.lean,Mathlib/AlgebraicGeometry/Modules/Tilde.lean,Mathlib/AlgebraicGeometry/Morphisms/Finite.lean,Mathlib/AlgebraicGeometry/Morphisms/FlatRank.lean,Mathlib/AlgebraicGeometry/Morphisms/SchemeTheoreticallyDominant.lean,Mathlib/AlgebraicGeometry/Morphisms/UniversallyClosed.lean,Mathlib/AlgebraicGeometry/Morphisms/WeaklyEtale.lean,Mathlib/AlgebraicGeometry/Noetherian.lean,Mathlib/AlgebraicTopology/SimplicialCategory/Basic.lean,Mathlib/AlgebraicTopology/SimplicialComplex/Basic.lean,Mathlib/AlgebraicTopology/SimplicialSet/Boundary.lean,Mathlib/AlgebraicTopology/SimplicialSet/Monoidal.lean,Mathlib/AlgebraicTopology/SimplicialSet/NonDegenerateSimplices.lean,Mathlib/AlgebraicTopology/SimplicialSet/NonDegenerateSimplicesSubcomplex.lean,Mathlib/Analysis/Asymptotics/Lemmas.lean,Mathlib/Analysis/Asymptotics/TVS.lean,Mathlib/Analysis/CStarAlgebra/Projection.lean,Mathlib/Analysis/Calculus/DerivativeTest.lean,Mathlib/Analysis/Calculus/FDeriv/Affine.lean,Mathlib/Analysis/Calculus/Implicit.lean,Mathlib/Analysis/Calculus/LogDeriv.lean,Mathlib/Analysis/Complex/CanonicalDecomposition.lean,Mathlib/Analysis/Complex/Harmonic/Liouville.lean,Mathlib/Analysis/Complex/Harmonic/Poisson.lean,Mathlib/Analysis/Complex/JensenFormula.lean,Mathlib/Analysis/Complex/Schwarz.lean,Mathlib/Analysis/Complex/UpperHalfPlane/Manifold.lean,Mathlib/Analysis/ConstantSpeed.lean,Mathlib/Analysis/Convex/Approximation.lean,Mathlib/Analysis/Convex/FunctionTopology.lean,Mathlib/Analysis/Convex/Segment.lean,Mathlib/Analysis/Distribution/SchwartzSpace/Basic.lean,Mathlib/Analysis/InnerProductSpace/Positive.lean,Mathlib/Analysis/LocallyConvex/Polar.lean,Mathlib/Analysis/Normed/Module/Bases.lean,Mathlib/Analysis/Normed/Module/Complemented.lean,Mathlib/Analysis/Normed/Module/DoubleDual.lean,Mathlib/Analysis/Normed/Module/Dual.lean,Mathlib/Analysis/ODE/DiscreteGronwall.lean,Mathlib/Analysis/RCLike/ContinuousMap.lean,Mathlib/Analysis/SpecialFunctions/ContinuousFunctionalCalculus/Rpow/RingInverseOrder.lean,Mathlib/Analysis/SpecialFunctions/Stirling.lean,Mathlib/Analysis/SpecialFunctions/Trigonometric/Chebyshev/ChebyshevGauss.lean,Mathlib/CategoryTheory/Abelian/Preradical/Colon.lean,Mathlib/CategoryTheory/Adhesive/Subobject.lean,Mathlib/CategoryTheory/CopyDiscardCategory/Widesubcategory.lean,Mathlib/CategoryTheory/Functor/ReflectsIso/Jointly.lean,Mathlib/CategoryTheory/Limits/Constructions/WidePullbackOfTerminal.lean,Mathlib/CategoryTheory/Limits/FunctorCategory/Shapes/Terminal.lean,Mathlib/CategoryTheory/Limits/Preserves/SigmaConst.lean,Mathlib/CategoryTheory/Limits/Preserves/Yoneda.lean,Mathlib/CategoryTheory/Limits/Yoneda.lean,Mathlib/CategoryTheory/Monoidal/Cartesian/Normal.lean,Mathlib/CategoryTheory/Monoidal/Internal/Limits.lean,Mathlib/CategoryTheory/Monoidal/Mon.lean,Mathlib/CategoryTheory/Monoidal/Widesubcategory.lean 381 27 ['JovanGerb', 'MichaelStollBayreuth', 'bryangingechen', 'github-actions', 'leanprover-radar', 'mathlib-merge-conflicts'] nobody
1-78253
1 day ago
1-78254
1 day ago
5-71867
5 days
39233 linesthatinterlace
author:linesthatinterlace
 feat: `Pi.map` rename to `Function.map` This PR renames `Pi.map` to `Function.map` and makes the changes necessary to support this. In particular this means that Mathlib.Logic.Function.Defs now only contains the Function namespace. Zulip thread: [#PR reviews > #39233 - rename Pi.map to Function.map @ 💬](https://leanprover.zulipchat.com/#narrow/channel/144837-PR-reviews/topic/.2339233.20-.20rename.20Pi.2Emap.20to.20Function.2Emap/near/594605689) General discussion regarding the Pi namespace: https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/The.20Pi.20namespace/near/594782721 --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) awaiting-zulip merge-conflict 131/122 Mathlib/Algebra/Category/Grp/AB.lean,Mathlib/Algebra/Notation/Pi/Defs.lean,Mathlib/Algebra/Order/Antidiag/Nat.lean,Mathlib/Algebra/Regular/Pi.lean,Mathlib/Analysis/InnerProductSpace/Coalgebra.lean,Mathlib/Analysis/SpecialFunctions/PolarCoord.lean,Mathlib/Condensed/Discrete/LocallyConstant.lean,Mathlib/Control/Bifunctor.lean,Mathlib/Data/Finset/Powerset.lean,Mathlib/Data/Prod/Basic.lean,Mathlib/Data/Set/Prod.lean,Mathlib/Dynamics/Ergodic/MeasurePreserving.lean,Mathlib/Dynamics/PeriodicPts/Defs.lean,Mathlib/Dynamics/PeriodicPts/Lemmas.lean,Mathlib/Dynamics/TopologicalEntropy/Semiconj.lean,Mathlib/FieldTheory/Perfect.lean,Mathlib/Geometry/Manifold/IsManifold/Basic.lean,Mathlib/Geometry/Manifold/IsManifold/ExtChartAt.lean,Mathlib/GroupTheory/MonoidLocalization/Lemmas.lean,Mathlib/LinearAlgebra/Multilinear/Basis.lean,Mathlib/LinearAlgebra/Pi.lean,Mathlib/Logic/Equiv/Basic.lean,Mathlib/Logic/Equiv/PartialEquiv.lean,Mathlib/Logic/Function/Basic.lean,Mathlib/Logic/Function/Defs.lean,Mathlib/Logic/Function/Iterate.lean,Mathlib/Order/Filter/Cofinite.lean,Mathlib/Order/Filter/Pi.lean,Mathlib/RingTheory/Coalgebra/Basic.lean,Mathlib/Topology/Algebra/FilterBasis.lean,Mathlib/Topology/Algebra/Module/LinearMapPiProd.lean,Mathlib/Topology/Algebra/RestrictedProduct/TopologicalSpace.lean,Mathlib/Topology/Constructions.lean,Mathlib/Topology/Maps/Basic.lean,Mathlib/Topology/MetricSpace/HausdorffAlexandroff.lean,Mathlib/Topology/MetricSpace/Isometry.lean,Mathlib/Topology/NhdsWithin.lean 37 2 ['github-actions', 'mathlib-merge-conflicts'] nobody
1-78251
1 day ago
10-23205
10 days ago
0-7302
2 hours
39254 urkud
author:urkud
 feat: define contour integrals Specialize `curveIntegral` to the case if the domain is `ℂ`. In this case, we can integrate a function, not a 1-form. I've decided not to specialize `HasFDerivWithinAt` etc theorems, because I want to review API for curve integrals first. This PR was written at ICERM meeting. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-measure-probability merge-conflict 255/4 Mathlib.lean,Mathlib/MeasureTheory/Integral/ContourIntegral/Basic.lean,Mathlib/MeasureTheory/Integral/CurveIntegral/Basic.lean,Mathlib/MeasureTheory/Integral/IntervalIntegral/Basic.lean,Mathlib/Topology/Algebra/Module/LinearMap.lean 5 2 ['github-actions', 'mathlib-merge-conflicts'] nobody
1-78250
1 day ago
10-22674
10 days ago
0-1607
26 minutes
39399 Brian-Nugent
author:Brian-Nugent
 feat(Algebra/CategoryTheory/ModuleCat): Locally Free Sheaves This PR gives a definition of locally free sheaves in terms of first defining a predicate IsLocallyFree for [SheafOfModules.LocalGeneratorsData](https://leanprover-community.github.io/mathlib4_docs/Mathlib/Algebra/Category/ModuleCat/Sheaf/Generators.html#SheafOfModules.LocalGeneratorsData). --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra t-category-theory merge-conflict
label:t-algebra$
 207/5 Mathlib.lean,Mathlib/Algebra/Category/ModuleCat/Sheaf/Generators.lean,Mathlib/Algebra/Category/ModuleCat/Sheaf/LocallyFree.lean,Mathlib/Algebra/Category/ModuleCat/Sheaf/Quasicoherent.lean 4 11 ['Brian-Nugent', 'github-actions', 'mathlib-merge-conflicts', 'robin-carlier'] dagurtomas
assignee:dagurtomas
1-78248
1 day ago
1-78249
1 day ago
5-61168
5 days
37752 JovanGerb
author:JovanGerb
 chore(Order/CompleteLattice/Lemmas): use `to_dual` Use `to_dual` for lemmas about `CompleteLattice`. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-order 27/56 Mathlib/Order/CompleteLattice/Lemmas.lean 1 1 ['github-actions', 'vihdzp'] nobody
1-75788
1 day ago
45-26228
45 days ago
45-25939
45 days
34805 DavidLedvinka
author:DavidLedvinka
 feat(Tactic): generalize ofScientific NormNum extension to `DivisionSemiring` Co-authored-by: @hrmacbeth t-meta 68/20 Mathlib/Tactic/NormNum/Inv.lean,Mathlib/Tactic/NormNum/OfScientific.lean,MathlibTest/norm_num.lean 3 26 ['DavidLedvinka', 'JovanGerb', 'b-mehta', 'eric-wieser', 'github-actions', 'mathlib-merge-conflicts', 'thorimur'] nobody
1-75787
1 day ago
62-6336
62 days ago
82-47459
82 days
37753 JovanGerb
author:JovanGerb
 chore(Order/Filter/Basic): use `to_dual` for `≤ᶠ` Use `to_dual` on lemmas about `EventuallyLE`. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-order 19/6 Mathlib/Order/Filter/Basic.lean 1 2 ['github-actions', 'vihdzp'] nobody
1-75787
1 day ago
45-26093
45 days ago
45-25804
45 days
33714 idontgetoutmuch
author:idontgetoutmuch
 feat(Mathlib/Geometry/Manifold): Riemannian metrics exist II Supersedes https://github.com/leanprover-community/mathlib4/pull/33519 --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-differential-geometry new-contributor 723/0 Mathlib.lean,Mathlib/Algebra/BigOperators/Finprod.lean,Mathlib/Geometry/Manifold/ExistsRiemannianMetric.lean,Mathlib/Geometry/Manifold/PartitionOfUnity.lean 4 200 ['Rida-Hamadani', 'github-actions', 'grunweg', 'idontgetoutmuch'] nobody
1-75786
1 day ago
33-28937
33 days ago
78-35631
78 days
35402 samueloettl
author:samueloettl
 feat(Dynamics/BirkhoffSum): birkhoffAverage const --- I think this is useful and one of these should be a simp lemma. I'm not really sure if I got the naming of the theorems correct. When generalizing to the assumption (n : R) ≠ 0 instead of the special case CharZero R with n ≠ 0 I had to use "open Classical in". I'm a bit unfamiliar with that part so please check if this makes sense. See also https://github.com/leanprover-community/mathlib4/pull/35307#discussion_r2823586252 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-dynamics new-contributor 14/0 Mathlib/Dynamics/BirkhoffSum/Average.lean 1 26 ['Maldooor', 'github-actions', 'lua-vr', 'mcdoll', 'samueloettl'] nobody
1-75784
1 day ago
23-28737
23 days ago
89-27261
89 days
37501 xgenereux
author:xgenereux
 feat(DedekindDomain/AdicValuation): `intValuation` on uniformizers is `exp (-1)` This PR add the lemma `intValuation_val_uniformizer_eq` which is an application of #37497. Note that I've had to reorganize the files a little bit: 1. I wanted to import `Valuation.Discrete.Basic` in `AdicValuation` but this was not possible since there was a dependency in the other direction (`Valuation.Discrete.Basic` depended on `AdicValuation`). I don't think this makes sense - we want to have access to basic definitions on general valuation in an application file like `AdicValuation`. ~~The reorganization consist of moving the `IsDiscreteValuationRing` of `Valuation.Discrete.Basic` to `AdicValuation`.~~ The reorganization consist of moving the `IsDiscreteValuationRing` section to a new file. 2. I moved some lemmas out of `Mathlib.RingTheory.Valuation.Discrete.RankOne` to the parent file `Mathlib.RingTheory.Valuation.Discrete.Basic.`. These lemmas do not need the richer imports from `RankOne` and are needed in my application. Co-authored-by: María Inés de Frutos Fernández <[mariaines.dff@gmail.com](mailto:mariaines.dff@gmail.com)> --- - [ ] depends on: #37497 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-ring-theory 203/167 Mathlib.lean,Mathlib/AlgebraicGeometry/EllipticCurve/Reduction.lean,Mathlib/NumberTheory/NumberField/Completion/FinitePlace.lean,Mathlib/RingTheory/DedekindDomain/AdicValuation.lean,Mathlib/RingTheory/OrderOfVanishing/Noetherian.lean,Mathlib/RingTheory/Valuation/Discrete/Basic.lean,Mathlib/RingTheory/Valuation/Discrete/IsDiscreteValuationRing.lean,Mathlib/RingTheory/Valuation/Discrete/RankOne.lean 8 4 ['github-actions', 'mathlib-dependent-issues', 'mathlib-merge-conflicts'] nobody
1-75784
1 day ago
34-52012
34 days ago
42-43580
42 days
39635 SnirBroshi
author:SnirBroshi
 feat(LinearAlgebra/Eigenspace/Matrix): a scalar is in the spectrum iff it's an eigenvalue --- [#Is there code for X? > Matrix eigenvalues: spectrum and mulVec](https://leanprover.zulipchat.com/#narrow/channel/217875-Is-there-code-for-X.3F/topic/Matrix.20eigenvalues.3A.20spectrum.20and.20mulVec/with/596538140) [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra
label:t-algebra$
 18/0 Mathlib/LinearAlgebra/Eigenspace/Matrix.lean 1 1 ['github-actions'] nobody
1-74240
1 day ago
1-74321
1 day ago
1-74032
1 day
36709 kim-em
author:kim-em
 feat(DefEqAbuse): suggest minimal @[implicit_reducible] workaround This PR extends `#defeq_abuse` to suggest a minimal set of `@[implicit_reducible]` annotations that would make the failing tactic or command succeed with `backward.isDefEq.respectTransparency true`. When `#defeq_abuse` detects a failure, it now runs a greedy minimisation over semireducible definitions reachable from the goal/command, finding a (possibly non-unique) minimal subset that, when temporarily marked `@[implicit_reducible]`, fixes the issue. The result is reported as an `info` message: ``` info: Workaround: the following @[implicit_reducible] annotations (a possibly non-unique minimal set) would paper over this problem, but the real issue is likely a leaky instance somewhere. set_option allowUnsafeReducibility true attribute [implicit_reducible] MyPred ``` This is a workaround, not a fix — the real cause is usually a leaky instance (which `#check_instance` from https://github.com/leanprover-community/mathlib4/pull/36706 can diagnose). But it can be useful for quick debugging. New helpers: `collectCandidates`, `markImplicitReducible`, `withTempImplicitReducible`, `withTempImplicitReducibleCmd`, `suggestAnnotationsTac`, `suggestAnnotationsCmd`, `formatAnnotations`, `logAnnotationSuggestions`. 🤖 Prepared with Claude Code t-meta LLM-generated 187/17 Mathlib/Tactic/DefEqAbuse.lean,MathlibTest/DefEqAbuse.lean 2 6 ['github-actions', 'kim-em', 'mathlib-merge-conflicts', 'thorimur'] JovanGerb
assignee:JovanGerb
1-74206
1 day ago
24-40226
24 days ago
41-38148
41 days
37541 EtienneC30
author:EtienneC30
 feat: another version of the cardinality of the difference In mathlib there is `Set.ncard_diff` which states that `(t \ s).ncard = t.ncard - s.ncard` when `s ⊆ t` and `s` is finite. But one way to prove that `s` is finite is by showing that `t` is finite and using the `s ⊆ t` hypothesis, so this PR adds `Set.ncard_diff'` which assumes that `t` is finite instead of `s`. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-data 5/0 Mathlib/Data/Set/Card.lean 1 1 ['github-actions'] Vierkantor
assignee:Vierkantor
1-74205
1 day ago
50-31147
50 days ago
50-30858
50 days
38225 kim-em
author:kim-em
 ci: block merging PRs with large import increases unless reviewed This PR makes the existing `large-import` label into a merge gate. PRs that significantly increase transitive imports (>2% for any modified file) are now blocked from merging until a reviewer adds the `allow-large-import` label. ### Why three labels? Bors's `block_labels` has no conditional logic — if a label is in the list, merge is blocked unconditionally. We need "blocked unless a reviewer has approved", i.e. `large-import ∧ ¬allow-large-import`. Since bors can't express that, we use a derived label: | Label | Managed by | Purpose | |---|---|---| | `large-import` | `build` job (import analysis) | Factual: this PR increases imports | | `blocked-by-large-import` | `check-large-import` job | Operational: blocks bors | | `allow-large-import` | Reviewer | Override: reviewer approves the increase | Each label is managed by exactly one actor, so there is no label-fighting. ### How it works 1. The existing `build` job adds/removes `large-import` based on import analysis (unchanged). 2. A new `check-large-import` job (in the same workflow) waits for `build` to finish, then: - If `large-import` is present and `allow-large-import` is absent → adds `blocked-by-large-import` - Otherwise → removes `blocked-by-large-import` 3. `blocked-by-large-import` is added to `block_labels` in `bors.toml`. When a reviewer adds `allow-large-import`, the `labeled` event re-triggers the workflow. The heavy `build` job is skipped (guarded by `github.event.action != 'labeled'`), but the lightweight `check-large-import` job runs, sees both labels, and removes `blocked-by-large-import`. Bors can now merge. ### Reviewer workflow The CI failure message tells the reviewer to consider whether the PR could be improved by splitting files, rearranging material, or creating new intermediate files. If the import increase is reasonable, they add `allow-large-import`. False positives can be reported on the [mathlib4 Zulip](https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/large-import.20label). 🤖 Prepared with Claude Code CI 78/2 .github/workflows/PR_summary.yml,bors.toml 2 7 ['SnirBroshi', 'github-actions', 'jcommelin', 'joneugster', 'kim-em'] bryangingechen
assignee:bryangingechen
1-74202
1 day ago
31-80538
31 days ago
31-80867
31 days
38500 kebekus
author:kebekus
 feat: integral presentation of the proximity function of value distribution theory If `f : ℂ → ℂ` is meromorphic, establish a presentation of the proximity function `proximity f ⊤` as iterated circle averages. This statement can be used to compare the proximity- and logarithmic counting functions, and is one of the key ingredients in the proof of Cartan's classic formula for the characteristic function. This is the first section of a multi-part PR, establishing Cartan's formula. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-analysis 211/0 Mathlib.lean,Mathlib/Analysis/Complex/ValueDistribution/Proximity/IntegralPresentation.lean 2 11 ['github-actions', 'kebekus', 'wwylele'] j-loreaux
assignee:j-loreaux
1-74201
1 day ago
26-59259
26 days ago
27-53673
27 days
38823 matthewjasper
author:matthewjasper
 chore(LinearAlgebra/TensorProduct): fix diamond in `AddCommGroup` instance The `SMul` instance for tensor products directly used `AddCon.lift`, so wasn't type correct at instance transparency. This caused a diamond with the `AddCommGroup` instance on tensor products because after unfolding some types didn't match, so I've wrapped the sMul function in a semireducible def to prevent this. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra
label:t-algebra$
 30/23 Mathlib/LinearAlgebra/TensorProduct/Basic.lean,Mathlib/LinearAlgebra/TensorProduct/Defs.lean 2 6 ['dagurtomas', 'github-actions', 'kbuzzard', 'leanprover-radar'] themathqueen
assignee:themathqueen
1-74200
1 day ago
21-2197
21 days ago
21-1908
21 days
39474 emlis42
author:emlis42
 feat(Topology/Separation/Hausdorff): add `Filter.limUnder_congr` This PR adds `Filter.limUnder_congr` and some lemmas about `limUnder`. `Filter.limUnder_congr` allows rewriting `limUnder` expressions using equivalences of convergence behavior, without proving the filters actually converge, allowing convergence proofs to be carried out on more convenient expressions latter. t-topology new-contributor large-import 24/1 Mathlib/Order/Filter/AtTopBot/Archimedean.lean,Mathlib/Topology/Separation/Hausdorff.lean 2 2 ['github-actions'] PatrickMassot
assignee:PatrickMassot
1-74198
1 day ago
6-9228
6 days ago
6-8939
6 days
39509 mcdoll
author:mcdoll
 chore(Topology): add `push/pull_end` tags for CLMs Simpsets were introduced in #38359, see also #39508 --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-topology merge-conflict 2/0 Mathlib/Topology/Algebra/Module/LinearMap.lean 1 2 ['github-actions', 'mathlib-merge-conflicts'] j-loreaux
assignee:j-loreaux
1-74198
1 day ago
1-78246
1 day ago
3-40182
3 days
39513 grunweg
author:grunweg
 feat: add `mvfderivWithin` with (d)elaborators and basic API Add `mvfderivWithin` (a version of `mvfderiv` within a set) and add analogues of all `mvfderiv` lemmas. We also add analogous custom elaborators and delaborators. To prove our set-up works, we re-phrase two lemmas in `VectorField/LieBracket.lean` to use this definition, instead of open-coding it. Part of https://github.com/leanprover-community/mathlib4/pull/36036, i.e. from the path towards the Levi-Civita connection and Riemanian curvature. Related to fixing defeq abuses related to tangent space and scalar multiplication in mathlib. --- - [x] depends on: #39485 - [x] depends on: #34257 - [ ] depends on: #39554 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-differential-geometry 197/12 Mathlib/Geometry/Manifold/MFDeriv/NormedSpace.lean,Mathlib/Geometry/Manifold/MFDeriv/SpecificFunctions.lean,Mathlib/Geometry/Manifold/VectorField/LieBracket.lean 3 5 ['github-actions', 'hrmacbeth', 'mathlib-dependent-issues', 'mathlib-merge-conflicts'] PatrickMassot
assignee:PatrickMassot
1-74196
1 day ago
2-31142
2 days ago
2-78206
2 days
39620 eric-wieser
author:eric-wieser
 feat: missing nnratCast lemmas for RCLike --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) easy t-analysis 10/3 Mathlib/Analysis/RCLike/Basic.lean 1 4 ['Whysoserioushah', 'eric-wieser', 'github-actions'] j-loreaux
assignee:j-loreaux
1-74194
1 day ago
2-4930
2 days ago
2-4800
2 days
37521 jessealama
author:jessealama
 feat(Data/Part): add Part.bind_eq_some_iff Add `Part.bind_eq_some_iff`, the `Part` analogue of `Option.bind_eq_some_iff`. Noticed this small gap while working on some equivalence proofs with partial functions. t-data 6/0 Mathlib/Data/Part.lean 1 6 ['github-actions', 'jessealama', 'joneugster', 'vihdzp'] joneugster
assignee:joneugster
1-73676
1 day ago
4-70249
4 days ago
47-26793
47 days
38483 jessealama
author:jessealama
 feat(Algebra/BigOperators): add `Antiperiodic.sum_Ico_shift` Three lemmas about `Finset` sums of `Function.Antiperiodic` functions: `sum_map_add_right` says that for `f` antiperiodic with antiperiod `c`, summing `f` over a `Finset` shifted by `c` (via `addRightEmbedding c`) negates the sum over the original; `sum_Ico_shift` is the half-open-interval specialization, immediate via `Finset.map_add_right_Ico`; and `sum_Ico_mul_add_sum_Ico_mul_shift_eq_zero` is a bilinear cancellation variant. Spun off from #29713 (Euler-Poincaré formula), where the bilinear form is used. t-algebra
label:t-algebra$
 63/0 Mathlib.lean,Mathlib/Algebra/BigOperators/Periodic.lean 2 5 ['github-actions', 'j-loreaux', 'jessealama', 'wwylele'] ocfnash
assignee:ocfnash
1-73162
1 day ago
17-55389
17 days ago
27-28131
27 days
36376 jessealama
author:jessealama
 feat(SimpleGraph): hamiltonian cycle from cyclic permutation This PR provides `IsHamiltonian.of_perm`, a bridge from `Equiv.Perm.IsCycle` to `SimpleGraph.IsHamiltonian`: if σ is a permutation that is a single cycle with full support on at least 3 elements, and each step `v → σ v` is an edge of `G`, then `G` is Hamiltonian. ### New definitions and lemmas **`Mathlib/Data/List/Chain.lean`**: - `IsChain.iterate`: `List.iterate f a n` is a chain under `r` whenever `r a (f a)` holds for all `a` **`Mathlib/Data/List/Iterate.lean`**: - `getLast_iterate`: the last element of `List.iterate f a n` is `f^[n - 1] a` **`Mathlib/Combinatorics/SimpleGraph/Walk/Iterate.lean`** (new file): - `Walk.iterate`: builds a walk of length `n` from `x` to `f^[n] x` for any function `f` with `G.Adj x (f x)` for all `x`, defined via `Walk.ofSupport` - `Walk.length_iterate`, `Walk.support_iterate`, `Walk.edges_iterate`: basic API **`Mathlib/GroupTheory/Perm/Cycle/Basic.lean`**: - `IsCycleOn.injOn_pow_apply`: the map `n ↦ (f ^ n) a` is injective on `Finset.range #s` **`Mathlib/GroupTheory/Perm/Cycle/Concrete.lean`**: - `IsCycleOn.injOn_sym2_pow_apply`: the unordered-pair edge map `k ↦ s((f ^ k) a, (f ^ (k + 1)) a)` is injective on `[0, #s)` when `#s ≠ 2` - `IsCycleOn.sym2_pow_apply_ne`: edge distinctness for cycle-on permutations — `s((f ^ k) a, (f ^ (k + 1)) a) ≠ s(a, f a)` when `k ≠ 0`, `k < #s`, and `#s ≠ 2` - `Perm.toList_eq_range_map_pow`: expresses `toList` as a range map over powers **`Mathlib/Combinatorics/SimpleGraph/Hamiltonian.lean`**: - `cons_isHamiltonianCycle_iff`: a Hamiltonian path closed by an edge outside its support is a Hamiltonian cycle, and conversely - `IsHamiltonian.of_perm`: the main theorem --- - [x] depends on: #36307 t-combinatorics maintainer-merge 182/0 Mathlib.lean,Mathlib/Combinatorics/SimpleGraph/Hamiltonian.lean,Mathlib/Combinatorics/SimpleGraph/Hamiltonian/Perm.lean,Mathlib/Combinatorics/SimpleGraph/Walk/Iterate.lean,Mathlib/Data/List/Chain.lean,Mathlib/Data/List/Iterate.lean,Mathlib/GroupTheory/Perm/Cycle/Basic.lean,Mathlib/GroupTheory/Perm/Cycle/Concrete.lean 8 78 ['SnirBroshi', 'YaelDillies', 'github-actions', 'jessealama', 'mathlib-dependent-issues', 'mathlib-merge-conflicts'] nobody
1-70752
1 day ago
3-55581
3 days ago
47-75031
47 days
33477 mcdoll
author:mcdoll
 refactor(Algebra): add type-classes for algebraic properties of `FunLike` --- Zulip discussion: [#mathlib4 > Refactoring algebraic properties of bundled maps](https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/Refactoring.20algebraic.20properties.20of.20bundled.20maps/with/566142461) - [ ] depends on: #37779 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) large-import merge-conflict 1782/897 Counterexamples/CliffordAlgebraNotInjective.lean,Mathlib.lean,Mathlib/Algebra/Algebra/Subalgebra/Centralizer.lean,Mathlib/Algebra/Azumaya/Matrix.lean,Mathlib/Algebra/BigOperators/Pi.lean,Mathlib/Algebra/Category/Grp/Colimits.lean,Mathlib/Algebra/Category/Grp/EpiMono.lean,Mathlib/Algebra/Category/ModuleCat/Basic.lean,Mathlib/Algebra/Category/ModuleCat/ChangeOfRings.lean,Mathlib/Algebra/Category/ModuleCat/Differentials/Basic.lean,Mathlib/Algebra/Category/ModuleCat/Monoidal/Basic.lean,Mathlib/Algebra/Category/ModuleCat/Semi.lean,Mathlib/Algebra/Category/ModuleCat/Topology/Basic.lean,Mathlib/Algebra/Central/End.lean,Mathlib/Algebra/DirectSum/Ring.lean,Mathlib/Algebra/Group/Finsupp.lean,Mathlib/Algebra/Group/Hom/Basic.lean,Mathlib/Algebra/Group/Hom/Defs.lean,Mathlib/Algebra/Group/Hom/End.lean,Mathlib/Algebra/Group/Hom/Instances.lean,Mathlib/Algebra/Group/Pi/Lemmas.lean,Mathlib/Algebra/GroupWithZero/Action/Defs.lean,Mathlib/Algebra/GroupWithZero/Hom.lean,Mathlib/Algebra/Homology/DerivedCategory/Ext/ExactSequences.lean,Mathlib/Algebra/Homology/HomotopyCategory/HomComplexCohomology.lean,Mathlib/Algebra/Homology/ShortComplex/Ab.lean,Mathlib/Algebra/Lie/Abelian.lean,Mathlib/Algebra/Lie/BaseChange.lean,Mathlib/Algebra/Lie/Basic.lean,Mathlib/Algebra/Lie/CartanExists.lean,Mathlib/Algebra/Lie/Cochain.lean,Mathlib/Algebra/Lie/Derivation/AdjointAction.lean,Mathlib/Algebra/Lie/Derivation/Basic.lean,Mathlib/Algebra/Lie/EngelSubalgebra.lean,Mathlib/Algebra/Lie/Extension.lean,Mathlib/Algebra/Lie/InvariantForm.lean,Mathlib/Algebra/Lie/LieTheorem.lean,Mathlib/Algebra/Lie/Nilpotent.lean,Mathlib/Algebra/Lie/TensorProduct.lean,Mathlib/Algebra/Lie/TraceForm.lean,Mathlib/Algebra/Lie/Weights/Basic.lean,Mathlib/Algebra/Lie/Weights/Cartan.lean,Mathlib/Algebra/Lie/Weights/IsSimple.lean,Mathlib/Algebra/Lie/Weights/Killing.lean,Mathlib/Algebra/Module/CharacterModule.lean,Mathlib/Algebra/Module/End.lean,Mathlib/Algebra/Module/Equiv/Basic.lean,Mathlib/Algebra/Module/FinitePresentation.lean,Mathlib/Algebra/Module/GradedModule.lean,Mathlib/Algebra/Module/Hom.lean,Mathlib/Algebra/Module/LinearMap/Basic.lean,Mathlib/Algebra/Module/LinearMap/Defs.lean,Mathlib/Algebra/Module/LinearMap/End.lean,Mathlib/Algebra/Module/Presentation/Basic.lean,Mathlib/Algebra/Module/Submodule/Bilinear.lean,Mathlib/Algebra/Module/Submodule/LinearMap.lean,Mathlib/Algebra/Module/Submodule/Map.lean,Mathlib/Algebra/Module/Submodule/Range.lean,Mathlib/Algebra/Module/ZLattice/Basic.lean,Mathlib/Algebra/MonoidAlgebra/Defs.lean,Mathlib/Algebra/MonoidAlgebra/Degree.lean,Mathlib/Algebra/MonoidAlgebra/Division.lean,Mathlib/Algebra/MonoidAlgebra/MapDomain.lean,Mathlib/Algebra/MonoidAlgebra/Module.lean,Mathlib/Algebra/MvPolynomial/CommRing.lean,Mathlib/Algebra/MvPolynomial/Degrees.lean,Mathlib/Algebra/MvPolynomial/Division.lean,Mathlib/Algebra/MvPolynomial/NoZeroDivisors.lean,Mathlib/Algebra/Order/CauSeq/Basic.lean,Mathlib/Algebra/Order/CauSeq/Completion.lean,Mathlib/Algebra/Order/Floor/Div.lean,Mathlib/Algebra/Polynomial/Basic.lean,Mathlib/Algebra/Polynomial/Coeff.lean,Mathlib/Algebra/Polynomial/HasseDeriv.lean,Mathlib/Algebra/SkewMonoidAlgebra/Basic.lean,Mathlib/AlgebraicGeometry/EllipticCurve/Affine/Point.lean,Mathlib/Analysis/Analytic/Binomial.lean,Mathlib/Analysis/Analytic/CPolynomialDef.lean,Mathlib/Analysis/Analytic/Composition.lean,Mathlib/Analysis/Analytic/Inverse.lean,Mathlib/Analysis/Analytic/IteratedFDeriv.lean,Mathlib/Analysis/Analytic/OfScalars.lean,Mathlib/Analysis/CStarAlgebra/CStarMatrix.lean,Mathlib/Analysis/CStarAlgebra/Multiplier.lean,Mathlib/Analysis/CStarAlgebra/Unitization.lean,Mathlib/Analysis/Calculus/ContDiff/FaaDiBruno.lean,Mathlib/Analysis/Calculus/ContDiff/Operations.lean,Mathlib/Analysis/Calculus/Deriv/Add.lean,Mathlib/Analysis/Calculus/Deriv/Basic.lean,Mathlib/Analysis/Calculus/Deriv/CompMul.lean,Mathlib/Analysis/Calculus/Deriv/Mul.lean,Mathlib/Analysis/Calculus/FDeriv/Analytic.lean,Mathlib/Analysis/Calculus/FDeriv/Symmetric.lean,Mathlib/Analysis/Calculus/FormalMultilinearSeries.lean,Mathlib/Analysis/Calculus/Implicit.lean,Mathlib/Analysis/Calculus/IteratedDeriv/Lemmas.lean,Mathlib/Analysis/Calculus/LagrangeMultipliers.lean,Mathlib/Analysis/Calculus/VectorField.lean,Mathlib/Analysis/Complex/CauchyIntegral.lean,Mathlib/Analysis/Complex/Conformal.lean 266 8 ['github-actions', 'leanprover-radar', 'mathlib-dependent-issues', 'mathlib4-merge-conflict-bot', 'mcdoll', 'plp127'] nobody
1-70586
1 day ago
unknown
0-0
0 seconds
39462 joelriou
author:joelriou
 feat(AlgebraicTopology/SimplicialSet): more API for PairingCore --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebraic-topology maintainer-merge 56/3 Mathlib/AlgebraicTopology/SimplicialSet/AnodyneExtensions/PairingCore.lean,Mathlib/AlgebraicTopology/SimplicialSet/AnodyneExtensions/Rank.lean,Mathlib/AlgebraicTopology/SimplicialSet/AnodyneExtensions/RankNat.lean 3 6 ['dagurtomas', 'github-actions', 'joelriou', 'robin-carlier'] robin-carlier
assignee:robin-carlier
1-70436
1 day ago
4-8983
4 days ago
5-72886
5 days
39459 yuanyi-350
author:yuanyi-350
 feat(NumberTheory/GaussSum): add shift and conjugation lemmas t-number-theory 19/6 Mathlib/NumberTheory/DirichletCharacter/GaussSum.lean,Mathlib/NumberTheory/GaussSum.lean 2 4 ['MichaelStollBayreuth', 'github-actions', 'loefflerd'] loefflerd
assignee:loefflerd
1-68365
1 day ago
3-80070
3 days ago
6-54989
6 days
38582 dennj
author:dennj
 feat(LinearAlgebra/Matrix): add Hadamard matrices Introduce `Matrix.IsHadamard` over a general `Ring R`, with the basic theory: - `IsHadamard` and `IsComplexHadamard` predicates (Definitions 2.3.1 and 2.7.1 of de Launey–Flannery, *Algebraic Design Theory*). - `IsHadamard.det_sq`: the Hadamard determinant identity `(det A)² = n^n`. - `IsHadamard.det_ne_zero`: over an integral domain of characteristic zero. - `IsHadamard.transpose`: `Aᵀ` is Hadamard whenever `A` is (Theorem 2.3.6), proved over `[CommRing R] [IsDomain R] [CharZero R]` via the adjugate. - `IsHadamard.card_eq_sq_of_const_row_sum`: a Hadamard matrix with constant row sum `s` has order `s²` (slightly stronger than Theorem 2.3.7: the constant-column-sum hypothesis is implied by orthogonality). - `IsHadamard.kronecker`: the Sylvester (Kronecker product) construction. - `IsHadamard.four_dvd_card`: order of a Hadamard matrix of order > 2 is divisible by 4. `Matrix.mul_eq_smul_one_symm`: if `M * N = c • 1` and `det M ≠ 0` over an integral domain, then `N * M = c • 1`. Used here for the transpose proof, but generally useful, analogous to how `mul_eq_one_comm` works over stably finite rings, but covers the integral-domain case (e.g. `ℤ`, `ℤ[X]`) where matrix inverses don't exist. ## References Adds the de Launey–Flannery bibliography entry, cited from the new file. Human-made PR with LLM used for proof golfing and documentation t-algebra new-contributor
label:t-algebra$
 166/0 Mathlib.lean,Mathlib/Algebra/Group/Action/Defs.lean,Mathlib/Algebra/Group/Commute/Defs.lean,Mathlib/LinearAlgebra/Matrix/HadamardMatrix.lean,docs/references.bib 5 51 ['JJYYY-JJY', 'dennj', 'eric-wieser', 'github-actions', 'themathqueen', 'wwylele'] nobody
1-65401
1 day ago
9-86212
9 days ago
25-18563
25 days
38214 emlis42
author:emlis42
 feat(Algebra/ContinuedFractions): add Euler's continued fraction This PR formalizes Euler’s continued fractions by providing `Euler` which construct one by giving head term and coefficients with some basic property. We also introduce a transformation `GenContFract.toEuler` that maps a generalized continued fraction `g : GenContFract K` to an equivalent Euler-form continued fraction. new-contributor t-algebra
label:t-algebra$
 262/0 Mathlib.lean,Mathlib/Algebra/ContinuedFractions/Euler.lean 2 15 ['github-actions', 'mathlib-bors', 'wwylele'] nobody
1-65298
1 day ago
29-15904
29 days ago
29-19367
29 days
38789 dupuisf
author:dupuisf
 feat(UniformOnFun): lemma for proving uniform convergence from uncurried form --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) WIP t-topology 195/1 Mathlib/Analysis/CStarAlgebra/ContinuousFunctionalCalculus/Continuity.lean,Mathlib/Analysis/SpecialFunctions/ContinuousFunctionalCalculus/Rpow/Basic.lean,Mathlib/Analysis/SpecialFunctions/ContinuousFunctionalCalculus/Rpow/Isometric.lean,Mathlib/Topology/Continuous.lean,Mathlib/Topology/ContinuousOn.lean,Mathlib/Topology/UniformSpace/CompactConvergence.lean 6 1 ['github-actions'] nobody
1-64897
1 day ago
21-73626
21 days ago
0-2
2 seconds
39638 mcdoll
author:mcdoll
 feat(Algebra): use `Is*Apply` for `LinearMap` --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra
label:t-algebra$
 33/33 Mathlib/Algebra/Module/LinearMap/Basic.lean,Mathlib/Algebra/Module/LinearMap/Defs.lean,Mathlib/Algebra/Module/LinearMap/End.lean 3 1 ['github-actions'] nobody
1-63248
1 day ago
unknown
0-0
0 seconds
29764 ScottCarnahan
author:ScottCarnahan
 feat(Algebra/Vertex): API up to residue products (WIP) This PR contains definitions leading up to the residue product of vertex operators and some basic properties. Parts will be split off as smaller PRs when I have time. --- - [ ] depends on: #25831 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra blocked-by-other-PR large-import merge-conflict WIP
label:t-algebra$
 1692/19 Mathlib.lean,Mathlib/Algebra/BigOperators/Finprod.lean,Mathlib/Algebra/Lie/Loop.lean,Mathlib/Algebra/MvPolynomial/Degrees.lean,Mathlib/Algebra/MvPolynomial/Equiv.lean,Mathlib/Algebra/MvPolynomial/RestrictedValue.lean,Mathlib/Algebra/Vertex/HVertexOperator.lean,Mathlib/Algebra/Vertex/VertexOperator.lean,Mathlib/RingTheory/Binomial.lean,Mathlib/RingTheory/HahnSeries/Addition.lean,Mathlib/RingTheory/HahnSeries/Binomial.lean,Mathlib/RingTheory/HahnSeries/HEval.lean,Mathlib/RingTheory/HahnSeries/Multiplication.lean,Mathlib/RingTheory/HahnSeries/Summable.lean,Mathlib/RingTheory/Polynomial/Pochhammer.lean 15 6 ['github-actions', 'mathlib-merge-conflicts', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
1-59695
1 day ago
246-26180
246 days ago
0-12586
3 hours
39640 yuanyi-350
author:yuanyi-350
 feat(Analysis): calculus log 3 and log 5 used in PR #39539 t-analysis 37/2 Mathlib/Analysis/Complex/ExponentialBounds.lean 1 1 ['github-actions'] nobody
1-58388
1 day ago
1-58463
1 day ago
1-58174
1 day
29533 Thmoas-Guan
author:Thmoas-Guan
 feat(Algebra): maximal Cohen Macaulay module In this PR, we defined the concept of maximal Cohen Macaulay module, and proved that finitely generated maximal Cohen Macaulay module over regular local ring is free. --- - [ ] depends on: #28683 - [ ] depends on: #26218 - [ ] depends on: #38698 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) blocked-by-other-PR t-algebra large-import
label:t-algebra$
 2455/163 Mathlib.lean,Mathlib/Algebra/Category/ModuleCat/Basic.lean,Mathlib/Algebra/Category/ModuleCat/Ext/Basic.lean,Mathlib/Algebra/Module/SpanRank.lean,Mathlib/AlgebraicGeometry/Properties.lean,Mathlib/RingTheory/CohenMacaulay/Basic.lean,Mathlib/RingTheory/CohenMacaulay/Maximal.lean,Mathlib/RingTheory/Depth/Basic.lean,Mathlib/RingTheory/Depth/Ischebeck.lean,Mathlib/RingTheory/Depth/Rees.lean,Mathlib/RingTheory/Ideal/Height.lean,Mathlib/RingTheory/Ideal/KrullsHeightTheorem.lean,Mathlib/RingTheory/Ideal/Maps.lean,Mathlib/RingTheory/Ideal/Operations.lean,Mathlib/RingTheory/KrullDimension/PID.lean,Mathlib/RingTheory/Nakayama.lean,Mathlib/RingTheory/Regular/Free.lean,Mathlib/RingTheory/Regular/LinearMap.lean,Mathlib/RingTheory/RegularLocalRing/Basic.lean,docs/references.bib 20 15 ['github-actions', 'mathlib-merge-conflicts', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
1-54995
1 day ago
253-72713
253 days ago
0-88
1 minute
29557 Thmoas-Guan
author:Thmoas-Guan
 feat(Algebra): finite projective dimension of regular In this PR, we proved every finitely generated module over regular local ring has finite projective dimension. With this and Auslander Buchsbaum theorem, we can obtain the global dimension of regular local ring is equal to its krull dimension. --- - [ ] depends on: #29533 - [ ] depends on: #26215 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) blocked-by-other-PR t-algebra large-import
label:t-algebra$
 2897/163 Mathlib.lean,Mathlib/Algebra/Category/ModuleCat/Basic.lean,Mathlib/Algebra/Category/ModuleCat/Ext/Basic.lean,Mathlib/Algebra/Module/SpanRank.lean,Mathlib/AlgebraicGeometry/Properties.lean,Mathlib/RingTheory/CohenMacaulay/Basic.lean,Mathlib/RingTheory/CohenMacaulay/Maximal.lean,Mathlib/RingTheory/Depth/AuslanderBuchsbaum.lean,Mathlib/RingTheory/Depth/Basic.lean,Mathlib/RingTheory/Depth/Ischebeck.lean,Mathlib/RingTheory/Depth/Rees.lean,Mathlib/RingTheory/Ideal/Height.lean,Mathlib/RingTheory/Ideal/KrullsHeightTheorem.lean,Mathlib/RingTheory/Ideal/Maps.lean,Mathlib/RingTheory/Ideal/Operations.lean,Mathlib/RingTheory/KrullDimension/PID.lean,Mathlib/RingTheory/Nakayama.lean,Mathlib/RingTheory/Regular/Free.lean,Mathlib/RingTheory/Regular/LinearMap.lean,Mathlib/RingTheory/RegularLocalRing/Basic.lean,Mathlib/RingTheory/RegularLocalRing/GlobalDimension.lean,docs/references.bib 22 16 ['github-actions', 'mathlib-merge-conflicts', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
1-54981
1 day ago
253-27693
253 days ago
0-1929
32 minutes
29699 Thmoas-Guan
author:Thmoas-Guan
 feat(Algebra/RingTheory): global dimension of regular ring In this PR, we proved that the global (homological dimension) of regular ring is equal to its krull dimension. --- - [ ] depends on: #28684 - [ ] depends on: #31999 - [ ] depends on: #29534 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) blocked-by-other-PR t-algebra large-import
label:t-algebra$
 3323/163 Mathlib.lean,Mathlib/Algebra/Category/ModuleCat/Basic.lean,Mathlib/Algebra/Category/ModuleCat/Ext/Baer.lean,Mathlib/Algebra/Category/ModuleCat/Ext/Basic.lean,Mathlib/Algebra/Homology/ShortComplex/ModuleCat.lean,Mathlib/Algebra/Module/SpanRank.lean,Mathlib/AlgebraicGeometry/Properties.lean,Mathlib/RingTheory/CohenMacaulay/Basic.lean,Mathlib/RingTheory/CohenMacaulay/Maximal.lean,Mathlib/RingTheory/Depth/AuslanderBuchsbaum.lean,Mathlib/RingTheory/Depth/Basic.lean,Mathlib/RingTheory/Depth/Ischebeck.lean,Mathlib/RingTheory/Depth/Rees.lean,Mathlib/RingTheory/GlobalDimension.lean,Mathlib/RingTheory/Ideal/Height.lean,Mathlib/RingTheory/Ideal/KrullsHeightTheorem.lean,Mathlib/RingTheory/Ideal/Maps.lean,Mathlib/RingTheory/Ideal/Operations.lean,Mathlib/RingTheory/KrullDimension/PID.lean,Mathlib/RingTheory/Nakayama.lean,Mathlib/RingTheory/Regular/Free.lean,Mathlib/RingTheory/Regular/LinearMap.lean,Mathlib/RingTheory/RegularLocalRing/Basic.lean,Mathlib/RingTheory/RegularLocalRing/GlobalDimension.lean,docs/references.bib 25 22 ['github-actions', 'mathlib-merge-conflicts', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
1-54965
1 day ago
248-58583
248 days ago
0-632
10 minutes
29534 Thmoas-Guan
author:Thmoas-Guan
 feat(Algebra): global dimension of regular local ring In this PR, we proved the global dimension of regular local ring is equal to its krull dimension via Auslander Buchsbaum theorem. --- - [ ] depends on: #29557 - [ ] depends on: #26215 - [ ] depends on: #29558 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) blocked-by-other-PR t-algebra large-import
label:t-algebra$
 3212/163 Mathlib.lean,Mathlib/Algebra/Category/ModuleCat/Basic.lean,Mathlib/Algebra/Category/ModuleCat/Ext/Baer.lean,Mathlib/Algebra/Category/ModuleCat/Ext/Basic.lean,Mathlib/Algebra/Homology/ShortComplex/ModuleCat.lean,Mathlib/Algebra/Module/SpanRank.lean,Mathlib/AlgebraicGeometry/Properties.lean,Mathlib/RingTheory/CohenMacaulay/Basic.lean,Mathlib/RingTheory/CohenMacaulay/Maximal.lean,Mathlib/RingTheory/Depth/AuslanderBuchsbaum.lean,Mathlib/RingTheory/Depth/Basic.lean,Mathlib/RingTheory/Depth/Ischebeck.lean,Mathlib/RingTheory/Depth/Rees.lean,Mathlib/RingTheory/GlobalDimension.lean,Mathlib/RingTheory/Ideal/Height.lean,Mathlib/RingTheory/Ideal/KrullsHeightTheorem.lean,Mathlib/RingTheory/Ideal/Maps.lean,Mathlib/RingTheory/Ideal/Operations.lean,Mathlib/RingTheory/KrullDimension/PID.lean,Mathlib/RingTheory/Nakayama.lean,Mathlib/RingTheory/Regular/Free.lean,Mathlib/RingTheory/Regular/LinearMap.lean,Mathlib/RingTheory/RegularLocalRing/Basic.lean,Mathlib/RingTheory/RegularLocalRing/GlobalDimension.lean,docs/references.bib 25 20 ['github-actions', 'mathlib-merge-conflicts', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
1-54959
1 day ago
253-70470
253 days ago
0-2082
34 minutes
29703 Thmoas-Guan
author:Thmoas-Guan
 feat(Algebra/RingTheory): Hilbert's Syzygy theorem (projective version) In this PR, we proved for field `k`, `MvPolynomial (Fin n) k` has global dimension `n`. --- - [ ] depends on: #29701 - [ ] depends on: #29699 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) blocked-by-other-PR t-ring-theory large-import 3481/163 Mathlib.lean,Mathlib/Algebra/Category/ModuleCat/Basic.lean,Mathlib/Algebra/Category/ModuleCat/Ext/Baer.lean,Mathlib/Algebra/Category/ModuleCat/Ext/Basic.lean,Mathlib/Algebra/Homology/ShortComplex/ModuleCat.lean,Mathlib/Algebra/Module/SpanRank.lean,Mathlib/AlgebraicGeometry/Properties.lean,Mathlib/RingTheory/CohenMacaulay/Basic.lean,Mathlib/RingTheory/CohenMacaulay/Maximal.lean,Mathlib/RingTheory/Depth/AuslanderBuchsbaum.lean,Mathlib/RingTheory/Depth/Basic.lean,Mathlib/RingTheory/Depth/Ischebeck.lean,Mathlib/RingTheory/Depth/Rees.lean,Mathlib/RingTheory/GlobalDimension.lean,Mathlib/RingTheory/Ideal/Height.lean,Mathlib/RingTheory/Ideal/KrullsHeightTheorem.lean,Mathlib/RingTheory/Ideal/Maps.lean,Mathlib/RingTheory/Ideal/Operations.lean,Mathlib/RingTheory/KrullDimension/PID.lean,Mathlib/RingTheory/Nakayama.lean,Mathlib/RingTheory/Regular/Free.lean,Mathlib/RingTheory/Regular/LinearMap.lean,Mathlib/RingTheory/RegularLocalRing/Basic.lean,Mathlib/RingTheory/RegularLocalRing/GlobalDimension.lean,Mathlib/RingTheory/RegularLocalRing/Polynomial.lean,Mathlib/RingTheory/RegularLocalRing/Syzygy.lean,docs/references.bib 27 23 ['github-actions', 'mathlib-merge-conflicts', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
1-54884
1 day ago
248-47601
248 days ago
0-2475
41 minutes
29796 Thmoas-Guan
author:Thmoas-Guan
 feat(RingTheory): regular of finite global dimension In this PR, we proved the other half of Auslander-Buchsbaum-Serre criterion, which states that a local ring is regular if it has finite global dimension, with results in #29557, we can obtain the full theorem. More APIs would be developed based on the two. --- - [ ] depends on: #26215 - [ ] depends on: #26217 - [ ] depends on: #29558 - [ ] depends on: #28683 - [ ] depends on: #38698 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) blocked-by-other-PR t-ring-theory large-import 2609/163 Mathlib.lean,Mathlib/Algebra/Category/ModuleCat/Basic.lean,Mathlib/Algebra/Category/ModuleCat/Ext/Baer.lean,Mathlib/Algebra/Category/ModuleCat/Ext/Basic.lean,Mathlib/Algebra/Homology/ShortComplex/ModuleCat.lean,Mathlib/Algebra/Module/SpanRank.lean,Mathlib/AlgebraicGeometry/Properties.lean,Mathlib/RingTheory/Depth/AuslanderBuchsbaum.lean,Mathlib/RingTheory/Depth/Basic.lean,Mathlib/RingTheory/Depth/Ischebeck.lean,Mathlib/RingTheory/Depth/Rees.lean,Mathlib/RingTheory/GlobalDimension.lean,Mathlib/RingTheory/Ideal/Height.lean,Mathlib/RingTheory/Ideal/KrullsHeightTheorem.lean,Mathlib/RingTheory/Ideal/Maps.lean,Mathlib/RingTheory/Ideal/Operations.lean,Mathlib/RingTheory/KrullDimension/PID.lean,Mathlib/RingTheory/Nakayama.lean,Mathlib/RingTheory/Regular/Free.lean,Mathlib/RingTheory/Regular/LinearMap.lean,Mathlib/RingTheory/RegularLocalRing/AuslanderBuchsbaumSerre.lean,Mathlib/RingTheory/RegularLocalRing/Basic.lean,docs/references.bib 23 18 ['github-actions', 'mathlib-merge-conflicts', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
1-54216
1 day ago
245-63795
245 days ago
0-80
1 minute
39463 joelriou
author:joelriou
 feat(AlgebraicTopology): nonsingular simplicial sets In this file, we introduce a typeclass `SSet.Nonsingular` for a simplicial set `X : SSet`: it says that for any non-degenerate simplex `x : X _⦋n⦌`, the corresponding morphism `Δ[n] ⟶ X` is a monomorphism. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebraic-topology maintainer-merge 123/0 Mathlib.lean,Mathlib/AlgebraicTopology/SimplicialSet/Nonsingular.lean,docs/references.bib 3 13 ['dagurtomas', 'github-actions', 'joelriou', 'robin-carlier'] robin-carlier
assignee:robin-carlier
1-54107
1 day ago
1-54182
1 day ago
5-29354
5 days
39136 vihdzp
author:vihdzp
 feat: more results on `Order.enum` Most importantly, we prove that the enumerator function of a (cofinal) set is normal iff the set is closed (under non-empty suprema). --- - [ ] depends on: #38362 - [x] depends on: #39137 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-set-theory blocked-by-other-PR t-order merge-conflict 197/11 Mathlib.lean,Mathlib/Order/BoundedOrder/Basic.lean,Mathlib/Order/Cofinal.lean,Mathlib/SetTheory/Cardinal/Aleph.lean,Mathlib/SetTheory/Cardinal/Cofinality/Enum.lean,Mathlib/SetTheory/Cardinal/Cofinality/Ordinal.lean 6 3 ['github-actions', 'mathlib-dependent-issues', 'mathlib-merge-conflicts'] nobody
1-53835
1 day ago
12-53922
12 days ago
0-308
5 minutes
29802 Thmoas-Guan
author:Thmoas-Guan
 feat(Algebra/RingTheory): Auslander–Buchsbaum–Serre criterion and its corollaries In this PR, we proved that: 1: The full version of Auslander–Buchsbaum–Serre criterion 2: Localization of regular local ring is regular 3: Global dimension finite implies regular (doesn't need local) 4: Regular ring only need to be verified at maximal ideals. --- - [ ] depends on: #29534 - [ ] depends on: #29699 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) blocked-by-other-PR t-ring-theory large-import 3848/163 Mathlib.lean,Mathlib/Algebra/Category/ModuleCat/Basic.lean,Mathlib/Algebra/Category/ModuleCat/Ext/Baer.lean,Mathlib/Algebra/Category/ModuleCat/Ext/Basic.lean,Mathlib/Algebra/Homology/ShortComplex/ModuleCat.lean,Mathlib/Algebra/Module/SpanRank.lean,Mathlib/AlgebraicGeometry/Properties.lean,Mathlib/RingTheory/CohenMacaulay/Basic.lean,Mathlib/RingTheory/CohenMacaulay/Maximal.lean,Mathlib/RingTheory/Depth/AuslanderBuchsbaum.lean,Mathlib/RingTheory/Depth/Basic.lean,Mathlib/RingTheory/Depth/Ischebeck.lean,Mathlib/RingTheory/Depth/Rees.lean,Mathlib/RingTheory/GlobalDimension.lean,Mathlib/RingTheory/Ideal/Height.lean,Mathlib/RingTheory/Ideal/KrullsHeightTheorem.lean,Mathlib/RingTheory/Ideal/Maps.lean,Mathlib/RingTheory/Ideal/Operations.lean,Mathlib/RingTheory/KrullDimension/PID.lean,Mathlib/RingTheory/Nakayama.lean,Mathlib/RingTheory/Regular/Free.lean,Mathlib/RingTheory/Regular/LinearMap.lean,Mathlib/RingTheory/RegularLocalRing/AuslanderBuchsbaumSerre.lean,Mathlib/RingTheory/RegularLocalRing/Basic.lean,Mathlib/RingTheory/RegularLocalRing/GlobalDimension.lean,Mathlib/RingTheory/RegularLocalRing/Localization.lean,docs/references.bib 27 23 ['github-actions', 'mathlib-merge-conflicts', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
1-53748
1 day ago
245-49226
245 days ago
0-458
7 minutes
39631 MichaelStollBayreuth
author:MichaelStollBayreuth
 chore: make Injective and Surjective `fun_prop`able --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) WIP large-import 22/3 Mathlib/Logic/Function/Basic.lean,Mathlib/Tactic/FunProp.lean,MathlibTest/FunPropMinimal.lean 3 1 ['github-actions'] nobody
1-51107
1 day ago
2-5589
2 days ago
0-2
2 seconds
38104 yuanyi-350
author:yuanyi-350
 refactor(MeasureTheory): golf 100 files This PR is an experimental project. In this PR, we use an Agent to automatically scan and attempt to simplify proofs. We hope to eventually effectively golf 100 files and avoid reinventing the wheel in mathlib. We have chosen `Mathlib/MeasureTheory` as the testing ground. If this experiment is very successful and accepted by the mathlib community, we would be honored to open source it. The relevant projects includes - [ ] #37968, which golfs `Mathlib/Analysis`. - [ ] #38144 , which golfs `Mathlib/NumberTheory`. **This PR serves as an index. For the actual code review, please refer to the individual PRs linked below. Each of those PRs modifies only a single file to facilitate the review process.** - [ ] depends on: #38350 - [ ] depends on: #38353 - [ ] depends on: #38455 - [ ] depends on: #38456 - [ ] depends on: #38492 - [ ] depends on: #38636 - [ ] depends on: #38639 - [ ] depends on: #38640 - [ ] depends on: #38872 - [ ] depends on: #38873 - [ ] depends on: #38874 - [ ] depends on: #38875 - [ ] depends on: #38876 - [ ] depends on: #38877 - [ ] depends on: #38878 - [ ] depends on: #38879 - [ ] depends on: #38880 - [ ] depends on: #38881 - [ ] depends on: #38882 - [ ] depends on: #38883 - [ ] depends on: #38884 - [ ] depends on: #38885 - [ ] depends on: #38886 - [ ] depends on: #39172 - [ ] depends on: #39173 - [ ] depends on: #39174 - [ ] depends on: #39175 - [ ] depends on: #39176 - [ ] depends on: #39177 - [ ] depends on: #39178 - [ ] depends on: #39179 - [ ] depends on: #39180 --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-measure-probability codex LLM-generated blocked-by-other-PR 109/270 Mathlib/MeasureTheory/Constructions/BorelSpace/Real.lean,Mathlib/MeasureTheory/Covering/Besicovitch.lean,Mathlib/MeasureTheory/Function/AEMeasurableOrder.lean,Mathlib/MeasureTheory/Function/AEMeasurableSequence.lean,Mathlib/MeasureTheory/Function/ConditionalExpectation/Real.lean,Mathlib/MeasureTheory/Function/ContinuousMapDense.lean,Mathlib/MeasureTheory/Function/ConvergenceInDistribution.lean,Mathlib/MeasureTheory/Function/LpOrder.lean,Mathlib/MeasureTheory/Function/LpSeminorm/TriangleInequality.lean,Mathlib/MeasureTheory/Function/SimpleFuncDenseLp.lean,Mathlib/MeasureTheory/Function/StronglyMeasurable/Basic.lean,Mathlib/MeasureTheory/Integral/Asymptotics.lean,Mathlib/MeasureTheory/Integral/CircleTransform.lean,Mathlib/MeasureTheory/Integral/Marginal.lean,Mathlib/MeasureTheory/Measure/CharacteristicFunction/Basic.lean,Mathlib/MeasureTheory/Measure/PreVariation.lean 16 9 ['github-actions', 'grunweg', 'mathlib-dependent-issues', 'mathlib-merge-conflicts', 'yuanyi-350'] kex-y
assignee:kex-y
1-50280
1 day ago
19-33012
19 days ago
4-44505
4 days
39604 qawbecrdtey
author:qawbecrdtey
 chore(GroupTheory/QuotientGroup/Basic): remove transitive import --- Removed transitive import `Mathlib.GroupTheory.Congruence.Hom`. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-group-theory easy maintainer-merge 0/1 Mathlib/GroupTheory/QuotientGroup/Basic.lean 1 2 ['github-actions', 'tb65536'] tb65536
assignee:tb65536
1-50279
1 day ago
2-69626
2 days ago
2-69337
2 days
37700 IvanRenison
author:IvanRenison
 feat(Combinatorics/SimpleGraph/Maps): add `Iso.induceIso` Similar to `induceHom` --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-combinatorics 29/0 Mathlib/Combinatorics/SimpleGraph/Maps.lean 1 5 ['YaelDillies', 'github-actions', 'vlad902'] YaelDillies
assignee:YaelDillies
1-50083
1 day ago
41-9507
41 days ago
46-21535
46 days
38375 WenrongZou
author:WenrongZou
 feat(MvPowerSeries): some lemmas `truncTotal` of `subst` This PR adds some lemmas about truncation of total degree of a substitution. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-ring-theory 154/7 Mathlib/RingTheory/MvPowerSeries/Substitution.lean,Mathlib/RingTheory/MvPowerSeries/Trunc.lean 2 3 ['BryceT233', 'github-actions'] joneugster
assignee:joneugster
1-49461
1 day ago
10-39072
10 days ago
30-22897
30 days
39645 RemyDegenne
author:RemyDegenne
 chore: generalize upcrossing lemmas TODO: move the new instance to a better place --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) WIP t-measure-probability 271/227 Mathlib/Probability/Martingale/Upcrossing.lean 1 1 ['github-actions'] nobody
1-48418
1 day ago
1-50342
1 day ago
0-1
1 second
35136 joelriou
author:joelriou
 feat(AlgebraicGeometry): points of the small étale site The main definition in this PR is `Scheme.pointSmallEtale`. Given a morphism `Spec (.of Ω) ⟶ S` where `Ω` is a separably closed field, we define the corresponding point of the small étale site of `S`. We show that these points form a conservative family. (This PR also removes the definition `Scheme.geometricFiber` which was not correct.) Co-authored-by: Christian Merten --- - [x] depends on: #35141 - [x] depends on: #35175 - [x] depends on: #35240 - [x] depends on: #34976 - [x] depends on: #33958 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebraic-geometry large-import 301/6 Mathlib.lean,Mathlib/AlgebraicGeometry/Fiber.lean,Mathlib/AlgebraicGeometry/Morphisms/Etale.lean,Mathlib/AlgebraicGeometry/Sites/Etale.lean,Mathlib/AlgebraicGeometry/Sites/EtalePoint.lean,Mathlib/CategoryTheory/Elements.lean,Mathlib/CategoryTheory/EssentialImage.lean,Mathlib/CategoryTheory/Limits/FinallySmall.lean,Mathlib/CategoryTheory/Limits/MorphismProperty.lean,Mathlib/CategoryTheory/MorphismProperty/Comma.lean,Mathlib/CategoryTheory/ObjectProperty/Small.lean 11 4 ['github-actions', 'mathlib-dependent-issues', 'mathlib-merge-conflicts'] nobody
1-48308
1 day ago
1-48348
1 day ago
2-3026
2 days
37495 IvanRenison
author:IvanRenison
 feat(Combinatorics/SimpleGraph/Sum): add homomorphism, embedding and isomorphism of sums --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-combinatorics maintainer-merge 58/2 Mathlib/Combinatorics/SimpleGraph/Sum.lean 1 19 ['IvanRenison', 'YaelDillies', 'github-actions', 'mkaratarakis'] nobody
1-47511
1 day ago
6-12855
6 days ago
45-38501
45 days
39285 vihdzp
author:vihdzp
 feat: enumerator function of club set is normal --- - [ ] depends on: #37677 - [ ] depends on: #39136 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-set-theory blocked-by-other-PR 226/32 Mathlib.lean,Mathlib/Order/BoundedOrder/Basic.lean,Mathlib/Order/Cofinal.lean,Mathlib/SetTheory/Cardinal/Aleph.lean,Mathlib/SetTheory/Cardinal/Cofinality/Club.lean,Mathlib/SetTheory/Cardinal/Cofinality/Enum.lean,Mathlib/SetTheory/Cardinal/Cofinality/Ordinal.lean 7 2 ['github-actions', 'mathlib-dependent-issues'] nobody
1-46474
1 day ago
9-49213
9 days ago
0-795
13 minutes
38362 vihdzp
author:vihdzp
 feat: cofinal subset of regular cardinal is isomorphic to it In set theory, one often identifies a cardinal `c` with its initial ordinal `c.ord`, and said ordinal with the lower set `Iio c.ord`. This is particularly pervasive in the theory of club and stationary subsets, where one often sees the hypothesis "let κ be a regular cardinal" in lieu of the more precise wording: that `κ` is an (infinite) well-order, whose order type equals the initial ordinal of its cardinality. We define a typeclass `IsRegularCardinalOrder` for this assumption. The benefit of using it is that our results won't apply only to `Iio c.ord` for regular `c`, but also to concrete types such as `Nat`, `Cardinal`, or `Ordinal`. As a proof of concept, we define `Order.enum`, a generalization of both `Nat.nth` and `Ordinal.enumOrd`. A future PR will deprecate the latter. --- - [x] depends on: #38363 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-set-theory maintainer-merge 127/11 Mathlib.lean,Mathlib/Order/BoundedOrder/Basic.lean,Mathlib/SetTheory/Cardinal/Aleph.lean,Mathlib/SetTheory/Cardinal/Cofinality/Enum.lean,Mathlib/SetTheory/Cardinal/Cofinality/Ordinal.lean 5 12 ['YaelDillies', 'github-actions', 'mathlib-dependent-issues', 'mathlib-merge-conflicts', 'vihdzp'] nobody
1-45172
1 day ago
7-45188
7 days ago
11-3444
11 days
39205 ooovi
author:ooovi
 feat(Geometry/Convex): Bundled convex set Add a bundled version of `IsConvexSet`. --- Once the dependencies are merged, this PR only changes `Mathlib.Geometry.Convex.Set` and `Mathlib.Geometry.Convex.Hull`, at the bottom of the file, adding `ConvexSet` and everything in the corresponding namespace. - [ ] depends on: #38934 - [ ] depends on: #38905 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) large-import blocked-by-other-PR merge-conflict 989/172 Mathlib.lean,Mathlib/Analysis/Convex/MetricSpace.lean,Mathlib/Data/Finsupp/Basic.lean,Mathlib/Geometry/Convex/ConvexSpace/AffineSpace.lean,Mathlib/Geometry/Convex/ConvexSpace/Defs.lean,Mathlib/Geometry/Convex/Hull.lean,Mathlib/Geometry/Convex/README.md,Mathlib/Geometry/Convex/Set.lean 8 6 ['github-actions', 'martinwintermath', 'mathlib-dependent-issues', 'mathlib-merge-conflicts'] nobody
1-40645
1 day ago
unknown
0-0
0 seconds
38934 YaelDillies
author:YaelDillies
 feat(Geometry): convex hull in a `ConvexSpace` --- - [x] depends on: #38905 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-convex-geometry 119/0 Mathlib.lean,Mathlib/Geometry/Convex/Hull.lean 2 11 ['YaelDillies', 'github-actions', 'martinwintermath', 'mathlib-dependent-issues', 'mathlib-merge-conflicts'] nobody
1-40165
1 day ago
1-40596
1 day ago
1-41020
1 day
38449 WenrongZou
author:WenrongZou
 feat(MvPowerSeries): some lemmas about `subst` of infinite sum In this PR, I add some lemmas about substituion of a infinite sum equal to infinite sum of substitution. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-ring-theory 35/0 Mathlib/RingTheory/MvPowerSeries/Substitution.lean,Mathlib/RingTheory/PowerSeries/Substitution.lean 2 10 ['WenrongZou', 'chrisflav', 'github-actions', 'mathlib-merge-conflicts'] chrisflav
assignee:chrisflav
1-40081
1 day ago
1-41477
1 day ago
27-62822
27 days
39616 sgouezel
author:sgouezel
 feat: more API for the variation of vector measures Prompted by the extension of the API around integrals wrt vector measures in #39113 --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-measure-probability 226/19 Mathlib/Data/ENNReal/Action.lean,Mathlib/MeasureTheory/Measure/MeasureSpace.lean,Mathlib/MeasureTheory/VectorMeasure/Basic.lean,Mathlib/MeasureTheory/VectorMeasure/Decomposition/JordanSub.lean,Mathlib/MeasureTheory/VectorMeasure/Variation/Basic.lean 5 1 ['github-actions'] nobody
1-34617
1 day ago
1-34695
1 day ago
2-23045
2 days
39280 Thmoas-Guan
author:Thmoas-Guan
 refactor(Ideal/MinimalPrimes): Refactor minimal primes APIs more entirely --- - [ ] depends on: #38029 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-ring-theory 222/111 Mathlib/AlgebraicGeometry/Properties.lean,Mathlib/RingTheory/Algebraic/StronglyTranscendental.lean,Mathlib/RingTheory/Artinian/Module.lean,Mathlib/RingTheory/Ideal/AssociatedPrime/Basic.lean,Mathlib/RingTheory/Ideal/Height.lean,Mathlib/RingTheory/Ideal/KrullsHeightTheorem.lean,Mathlib/RingTheory/Ideal/MinimalPrime/Basic.lean,Mathlib/RingTheory/Ideal/MinimalPrime/Colon.lean,Mathlib/RingTheory/Ideal/MinimalPrime/Localization.lean,Mathlib/RingTheory/KrullDimension/Basic.lean,Mathlib/RingTheory/KrullDimension/Zero.lean,Mathlib/RingTheory/Localization/AtPrime/Basic.lean,Mathlib/RingTheory/Spectrum/Prime/Topology.lean,Mathlib/RingTheory/Unramified/Dedekind.lean 14 3 ['github-actions', 'mathlib-bors', 'mathlib-dependent-issues'] nobody
1-34375
1 day ago
9-59690
9 days ago
0-7
7 seconds
34826 wwylele
author:wwylele
 feat(Geometry/Euclidean): volume of a simplex and extra WIP. sorry-free but still need cleaning up and breaking into smaller PRs --- - [x] depends on: #34697 - [x] depends on: #34858 - [x] depends on: #34859 - [x] depends on: #35039 - [x] depends on: #35358 - [x] depends on: #35365 - [x] depends on: #35837 - [ ] depends on: #36018 - [x] depends on: #36462 - [x] depends on: #36466 - [x] depends on: #36952 - [ ] depends on: #37910 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-euclidean-geometry blocked-by-other-PR merge-conflict 1211/6 Mathlib.lean,Mathlib/Geometry/Euclidean/Volume/Basic.lean,Mathlib/Geometry/Euclidean/Volume/Def.lean,Mathlib/Geometry/Euclidean/Volume/Measure.lean,Mathlib/Geometry/Euclidean/Volume/MeasureSimplex.lean,Mathlib/LinearAlgebra/AffineSpace/AffineSubspace/Shift.lean,Mathlib/LinearAlgebra/AffineSpace/Simplex/Basic.lean,Mathlib/MeasureTheory/MeasurableSpace/Embedding.lean,Mathlib/MeasureTheory/Measure/Haar/InnerProductSpace.lean 9 5 ['github-actions', 'mathlib-dependent-issues', 'mathlib-merge-conflicts'] nobody
1-34096
1 day ago
unknown
0-0
0 seconds
38531 SnirBroshi
author:SnirBroshi
 feat(Combinatorics/SimpleGraph/Paths): `Walk.map` preserves more properties Adds some missing theorems about how `Walk.map` behaves with `IsTrail`/`IsPath`/`IsCircuit`/`IsCycle`. Summary of what we have now, with the 8 new theorems and 2 renames marked: ``` IsTrail.of_map : (p.map f).IsTrail → p.IsTrail -- new map_isTrail_iff_of_injective : f.Injective → (p.map f).IsTrail ↔ p.IsTrail IsTrail.map : f.Injective → p.IsTrail → (p.map f).IsTrail -- renamed from map_isTrail_of_injective IsPath.of_map : (p.map f).IsPath → p.IsPath map_isPath_iff_of_injective : f.Injective → (p.map f).IsPath ↔ p.IsPath IsPath.map : f.Injective f → p.IsPath → (p.map f).IsPath -- renamed from map_isPath_of_injective IsCircuit.of_map : (p.map f).IsCircuit → p.IsCircuit -- new map_isCircuit_iff_of_injective : f.Injective → (p.map f).IsCircuit ↔ p.IsCircuit -- new IsCircuit.map : f.Injective → p.IsCircuit → (p.map f).IsCircuit -- new IsCycle.of_map : (p.map f).IsCycle → p.IsCycle -- new map_isCycle_iff_of_injective : f.Injective → (p.map f).IsCycle ↔ p.IsCycle IsCycle.map : f.Injective → p.IsCycle → (p.map f).IsCycle mapLe_isTrail : G ≤ G' → (p.mapLe h).IsTrail ↔ p.IsTrail IsTrail.of_mapLe : G ≤ G' → (p.mapLe h).IsTrail → p.IsTrail IsTrail.mapLe : G ≤ G' → p.IsTrail → (p.mapLe h).IsTrail mapLe_isPath : G ≤ G' → (p.mapLe h).IsPath ↔ p.IsPath IsPath.of_mapLe : G ≤ G' → (p.mapLe h).IsPath → p.IsPath IsPath.mapLe : G ≤ G' → p.IsPath → (p.mapLe h).IsPath mapLe_isCircuit : G ≤ G' → (p.mapLe h).IsCircuit ↔ p.IsCircuit -- new IsCircuit.of_mapLe : G ≤ G' → (p.mapLe h).IsCircuit → p.IsCircuit -- new IsCircuit.mapLe : G ≤ G' → p.IsCircuit → (p.mapLe h).IsCircuit -- new mapLe_isCycle : G ≤ G' → (p.mapLe h).IsCycle ↔ p.IsCycle IsCycle.of_mapLe : G ≤ G' → (p.mapLe h).IsCycle → p.IsCycle IsCycle.mapLe : G ≤ G' → p.IsCycle → (p.mapLe h).IsCycle ``` --- Also golfs `map_isPath_of_injective`/`IsPath.of_map`/`map_isTrail_iff_of_injective`, they don't need induction. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-combinatorics 47/30 Mathlib/Combinatorics/SimpleGraph/Paths.lean 1 1 ['github-actions'] nobody
1-34073
1 day ago
27-4687
27 days ago
27-4398
27 days
38349 SnirBroshi
author:SnirBroshi
 chore(Combinatorics/SimpleGraph/Coloring/VertexColoring): rename to `Vertex.lean` After #37525 moved `Coloring.lean` to `Coloring/VertexColoring.lean`, a [Zulip](https://leanprover.zulipchat.com/#narrow/channel/252551-graph-theory/topic/Coloring.20module.20names/with/583281500) poll decided to avoid duplicating the word "Coloring", so this renames `Coloring/VertexColoring.lean` to `Coloring/Vertex.lean`. --- I planned to make this move in #33313 but it isn't moving along, so I think it's best to split the renaming. #37546 adds module deprecation [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) file-removed t-combinatorics 6/6 Mathlib.lean,Mathlib/Combinatorics/SimpleGraph/Bipartite.lean,Mathlib/Combinatorics/SimpleGraph/Coloring/Constructions.lean,Mathlib/Combinatorics/SimpleGraph/Coloring/Vertex.lean,Mathlib/Combinatorics/SimpleGraph/CompleteMultipartite.lean,Mathlib/Combinatorics/SimpleGraph/Partition.lean,Mathlib/Combinatorics/SimpleGraph/Sum.lean 7 2 ['github-actions', 'mathlib-merge-conflicts'] nobody
1-33996
1 day ago
22-75572
22 days ago
30-75429
30 days
38357 SnirBroshi
author:SnirBroshi
 feat(Combinatorics/SimpleGraph/Coloring/Greedy): Greedy coloring --- Dependencies are included as sorried theorems to make the diff saner, but exist in the dependent PRs in full. - [ ] depends on: #35619 - [x] depends on: #35622 - [x] depends on: #35628 - [ ] depends on: #36626 - [x] depends on: #38422 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-combinatorics large-import blocked-by-other-PR 307/1 Mathlib.lean,Mathlib/Combinatorics/SimpleGraph/Coloring/Greedy.lean,Mathlib/Combinatorics/SimpleGraph/Coloring/VertexColoring.lean,Mathlib/Combinatorics/SimpleGraph/Finite.lean 4 2 ['github-actions', 'mathlib-dependent-issues'] nobody
1-33622
1 day ago
30-61611
30 days ago
0-3012
50 minutes
39340 vihdzp
author:vihdzp
 feat: redefine `Ordinal.deriv` in terms of `Order.enum` --- - [ ] depends on: #39285 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) blocked-by-other-PR 558/38 Mathlib.lean,Mathlib/Order/BoundedOrder/Basic.lean,Mathlib/Order/Cofinal.lean,Mathlib/SetTheory/Cardinal/Aleph.lean,Mathlib/SetTheory/Cardinal/Cofinality/Club.lean,Mathlib/SetTheory/Cardinal/Cofinality/Enum.lean,Mathlib/SetTheory/Cardinal/Cofinality/Ordinal.lean,Mathlib/SetTheory/Ordinal/FixedPoint.lean,Mathlib/SetTheory/Ordinal/Univ.lean 9 3 ['github-actions', 'mathlib-dependent-issues', 'mathlib-merge-conflicts'] nobody
1-33459
1 day ago
unknown
0-0
0 seconds
39656 justus-springer
author:justus-springer
 feat(AlgebraicGeometry/Birational/RationalMap): add `RationalMap.representative` Split off from #39317 --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) maintainer-merge t-algebraic-geometry 14/0 Mathlib/AlgebraicGeometry/Birational/RationalMap.lean 1 2 ['chrisflav', 'github-actions'] nobody
1-33416
1 day ago
1-33924
1 day ago
1-33635
1 day
39442 justus-springer
author:justus-springer
 feat(AlgebraicGeometry/Restrict): a few more restriction lemmas These will be used later to define composition of rational maps in #39445. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebraic-geometry 55/0 Mathlib/AlgebraicGeometry/Restrict.lean 1 1 ['github-actions'] chrisflav
assignee:chrisflav
1-33126
1 day ago
6-84653
6 days ago
6-84364
6 days
37940 BryceT233
author:BryceT233
 feat(Algebra/Category): the category of local extensions over a fixed field This is an attempt to design the definitions of base category [[Stacks, 06GC]](https://stacks.math.columbia.edu/tag/06GC) and complete base category in deformation theory. The approach we take is to first introduce a larger category of local extensions with a fixed field, then define base category and complete base category to be full subcategories of this larger category via `ObjectProperty`. To be specific: * In `Defs.lean`, we define `LocExtCat` and `LocExtCat.Hom` to be the type of objects and morphisms in the category. * In `Basic.lean`, we add the basic construction `ofQuot` and `toOfQuot`, which is the quotient of an object in `LocExtCat` by a proper Ideal. Then we use them to define `infinitesimal` and `specialFiber` for an object in `LocExtCat`. * In `Cotangent.lean`, we prove the exactness of the conormal sequence for the special fiber. * In `BaseCat.lean`, we define `BaseCat` to be the full subcategory of `LocExtCat` consisting of objects whose underlying rings are Artinian, and introduce the type class of a small extension for morphisms in `BaseCat`. We show that any surjective morphism in `BaseCat` can be factored into a finite composition of small extensions [[Stacks, 06GE]](https://stacks.math.columbia.edu/tag/06GE) This PR is intended to showcase the overall design and architecture, I will split this into smaller PRs once the community reaches a consensus on the design choices. --- - [x] depends on: #36657 - [ ] depends on: #37008 - [ ] depends on: #39223 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) blocked-by-other-PR t-algebra WIP
label:t-algebra$
 1623/0 Mathlib.lean,Mathlib/Algebra/Category/LocExtCat/BaseCat.lean,Mathlib/Algebra/Category/LocExtCat/Basic.lean,Mathlib/Algebra/Category/LocExtCat/Cotangent.lean,Mathlib/Algebra/Category/LocExtCat/Defs.lean,Mathlib/RingTheory/Extension/Basic.lean,Mathlib/RingTheory/Extension/Cotangent/Basic.lean,Mathlib/RingTheory/Ideal/Maps.lean,Mathlib/RingTheory/Kaehler/JacobiZariski.lean,Mathlib/RingTheory/LocalRing/Pullback.lean,Mathlib/RingTheory/LocalRing/ResidueField/Instances.lean 11 32 ['BryceT233', 'Deicyde', 'YaelDillies', 'github-actions', 'mathlib-dependent-issues'] nobody
1-33064
1 day ago
35-38638
35 days ago
2-38364
2 days
36507 BryceT233
author:BryceT233
 feat(RingTheory/MvPowerSeries): various equivalences for `MvPowerSeries` This PR adds a number of equivalences related to power series rings and is patterned after `Mathlib/Algebra/MvPolynomial/Equiv.lean`. To be specific, it adds: * `MvPowerSeries.isEmptyEquiv` : The isomorphism between multivariable power series in no variables and the ground ring. * `MvPowerSeries.uniqueEquiv` : The isomorphism between multivariable power series in a single variable and power series over the ground ring. * `MvPowerSeries.mapEquiv`, `MvPowerSeries.mapAlgEquiv` : The isomorhism between multivariable power series induced by an isomorphism between the coefficient rings. * `MvPowerSeries.sumAlgEquiv` : The isomorphism between multivariable power series in a sum of two types, and multivariable power series in one of the types, with coefficients in multivariable power series in the other type. * `MvPowerSeries.commAlgEquiv` : The isomorphism between multivariable power series in variables `σ` of multivariable power series in variables `τ` and multivariable power series in variables `τ` of multivariable power series in variables `σ`. * `MvPowerSeries.optionEquivLeft` : The isomorphism between multivariable power series in `Option σ` and power series with coefficients in `MvPowerSeries σ R`. * `MvPowerSeries.optionEquivRight` : The isomorphism between multivariable power series in `Option σ` and multivariable power series in `σ` with coefficients in `PowerSeries R` * `MvPowerSeries.finSuccEquiv` : The isomorphism between multivariable power series in `Fin (n + 1)` and power series over multivariable power series in `Fin n`. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) - [x] depends on: #35329 - [x] depends on: #36506 t-ring-theory large-import 598/4 Mathlib/RingTheory/MvPowerSeries/Basic.lean,Mathlib/RingTheory/MvPowerSeries/Equiv.lean 2 26 ['AntoineChambert-Loir', 'BryceT233', 'Thmoas-Guan', 'WenrongZou', 'YaelDillies', 'eric-wieser', 'github-actions', 'mathlib-dependent-issues'] mattrobball
assignee:mattrobball
1-32960
1 day ago
12-70435
12 days ago
45-27577
45 days
37546 SnirBroshi
author:SnirBroshi
 chore(Combinatorics/SimpleGraph): add module deprecations for #36819 #36854 #37525 #37544 #38349 --- - [x] depends on: #37544 - [ ] depends on: #38349 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-combinatorics blocked-by-other-PR 696/618 Mathlib.lean,Mathlib/Combinatorics/SimpleGraph/Bipartite.lean,Mathlib/Combinatorics/SimpleGraph/Coloring.lean,Mathlib/Combinatorics/SimpleGraph/Coloring/Constructions.lean,Mathlib/Combinatorics/SimpleGraph/Coloring/Vertex.lean,Mathlib/Combinatorics/SimpleGraph/Coloring/VertexColoring.lean,Mathlib/Combinatorics/SimpleGraph/CompleteMultipartite.lean,Mathlib/Combinatorics/SimpleGraph/ConcreteColorings.lean,Mathlib/Combinatorics/SimpleGraph/Connectivity/WalkCounting.lean,Mathlib/Combinatorics/SimpleGraph/Connectivity/WalkDecomp.lean,Mathlib/Combinatorics/SimpleGraph/EdgeLabeling.lean,Mathlib/Combinatorics/SimpleGraph/Partition.lean,Mathlib/Combinatorics/SimpleGraph/Sum.lean,Mathlib/Combinatorics/SimpleGraph/Walks/Basic.lean,Mathlib/Combinatorics/SimpleGraph/Walks/Counting.lean,Mathlib/Combinatorics/SimpleGraph/Walks/Decomp.lean,Mathlib/Combinatorics/SimpleGraph/Walks/Maps.lean,Mathlib/Combinatorics/SimpleGraph/Walks/Operations.lean,Mathlib/Combinatorics/SimpleGraph/Walks/Subwalks.lean,Mathlib/Combinatorics/SimpleGraph/Walks/Traversal.lean 20 4 ['github-actions', 'mathlib-dependent-issues', 'mathlib-merge-conflicts'] nobody
1-32952
1 day ago
30-76003
30 days ago
0-29887
8 hours
39561 SnirBroshi
author:SnirBroshi
 feat(Combinatorics/SimpleGraph/Operations): a graph is the supremum of edge graphs - `G = ⨆ e ∈ G.edgeSet, fromEdgeSet {e}` - `G = sSup { edge u v | (u : V) (v : V) (_ : G.Adj u v) }` and `edgeSet` & `fromEdgeSet` preserve sup & inf. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-combinatorics 51/0 Mathlib/Combinatorics/SimpleGraph/Basic.lean,Mathlib/Combinatorics/SimpleGraph/Operations.lean 2 2 ['b-mehta', 'github-actions'] nobody
1-32429
1 day ago
3-61165
3 days ago
3-60876
3 days
39627 SnirBroshi
author:SnirBroshi
 feat(Combinatorics/SimpleGraph/LapMatrix): 0 is always an eigenvalue and the determinant is always zero, plus a few other small lemmas. --- - [x] depends on: #39642 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-combinatorics 71/15 Mathlib/Combinatorics/SimpleGraph/LapMatrix.lean 1 2 ['github-actions', 'mathlib-dependent-issues'] nobody
1-32188
1 day ago
1-36658
1 day ago
1-84079
1 day
39317 justus-springer
author:justus-springer
 feat(AlgebraicGeometry/Birational): dominant rational maps Add a predicate `RationalMap.IsDominant` and add basic API. This is in preparation for defining composition of rational maps (see #39445). See also [stacks#01RR](https://stacks.math.columbia.edu/tag/01RR). - [x] depends on: #39316 - [ ] depends on: #39656 --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebraic-geometry blocked-by-other-PR 105/0 Mathlib.lean,Mathlib/AlgebraicGeometry/Birational/Dominant.lean,Mathlib/AlgebraicGeometry/Birational/RationalMap.lean 3 7 ['chrisflav', 'dagurtomas', 'github-actions', 'justus-springer', 'mathlib-dependent-issues'] chrisflav and dagurtomas
assignee:dagurtomas assignee:chrisflav
1-32141
1 day ago
1-52542
1 day ago
7-40850
7 days
39613 sharky564
author:sharky564
 feat(LinearAlgebra/Projection): add quotientEquivOfIsCompl_comp_mkQ Adds the lemma `Submodule.quotientEquivOfIsCompl_comp_mkQ` - the composition of `quotientEquivOfIsCompl` with `mkQ` agrees with the linear projection onto `q` along `p`. This also simplifies the proof of `IsCompl.isTopCompl_iff_continuous_quotientEquivOfIsCompl`. --- This lemma was flagged as missing in the API in the review of #39260 by @themathqueen. With this lemma, the proof it was flagged in simplifies a fair bit. t-algebra t-topology
label:t-algebra$
 6/4 Mathlib/LinearAlgebra/Projection.lean,Mathlib/Topology/Algebra/Module/Complement.lean 2 1 ['github-actions'] nobody
1-30934
1 day ago
2-26813
2 days ago
2-28391
2 days
35504 JoaBjo
author:JoaBjo
 feat(Probability/Distributions/Exponential): add MGF, moments, and memoryless property feat(Probability/Distributions/Exponential): add MGF, moments, and memoryless property Add the main analytic results for the exponential distribution: - moment-generating function `mgf id (expMeasure r) t = r / (r - t)` for `t < r` - mean `∫ x, x ∂(expMeasure r) = r⁻¹` - variance `Var[id; expMeasure r] = r⁻¹ ^ 2` - `ℒp` membership for all `p` - tail probability `P(X > x) = exp (-(r * x))` - memoryless property `P(X > s + t | X > s) = P(X > t)` The MGF is computed by reducing to the known improper integral `∫ exp(c * x)` on `Ioi`, and integrability is deduced by contradiction from the positive closed-form value. The mean and variance are computed via the Gamma function integral `∫₀^∞ x^(n-1) exp(-r x) dx = Γ(n) / rⁿ`. The memoryless property follows from the exponential identity `exp(-(r(s+t))) = exp(-rt) * exp(-rs)`. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor t-measure-probability awaiting-author 200/0 Mathlib/Probability/Distributions/Exponential.lean 1 7 ['EtienneC30', 'JoaBjo', 'Timeroot', 'github-actions'] EtienneC30
assignee:EtienneC30
1-27642
1 day ago
1-27643
1 day ago
42-10925
42 days
38902 xroblot
author:xroblot
 feat(FieldTheory/Galois/IsGaloisGroup): add `IsGaloisGroup.of_algEquiv` and `of_ringEquiv` Add two constructors for `IsGaloisGroup`: - `IsGaloisGroup.of_algEquiv`: if `G` is a Galois group on `B/A` and `e : B ≃ₐ[A] B'` is `G`-equivariant, then `G` is a Galois group on `B'/A`. - `IsGaloisGroup.of_ringEquiv`: if `G` is a Galois group on `B/A` and `e : A ≃+* A'` is compatible with the algebra structures, then `G` is a Galois group on `B/A'`. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra
label:t-algebra$
 31/0 Mathlib/FieldTheory/Galois/IsGaloisGroup.lean 1 2 ['github-actions', 'mathlib-merge-conflicts'] nobody
1-27513
1 day ago
9-40592
9 days ago
14-77710
14 days
38698 Thmoas-Guan
author:Thmoas-Guan
 feat(RingTheory/Regular): freeness of `QuotSMulTop` For finitely generated module `M` over Noetherian local ring `(R, m)`, if `x ∈ m` is `M`-regular, `M/xM` is free over `R/(x)` iff `M` is free over `R`. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-ring-theory 95/0 Mathlib.lean,Mathlib/RingTheory/Nakayama.lean,Mathlib/RingTheory/Regular/Free.lean 3 11 ['Thmoas-Guan', 'chrisflav', 'github-actions'] chrisflav
assignee:chrisflav
1-27474
1 day ago
1-55004
1 day ago
23-30830
23 days
38340 xroblot
author:xroblot
 refactor(Data/ZMod): move `coe_int_isUnit_iff_isCoprime` to `ZMod.Units` Move `ZMod.coe_int_isUnit_iff_isCoprime` from `Mathlib.Data.ZMod.Coprime` to `Mathlib.Data.ZMod.Units`, where it more naturally belongs as a statement about units in `ZMod`. The proof is rewritten to only use tools available in `Mathlib.Data.ZMod.Units`, avoiding the dependency on `Mathlib.Algebra.EuclideanDomain.Int`. This is motivated by the desire to use `coe_int_isUnit_iff_isCoprime` without the overhead of importing `Mathlib.Data.ZMod.Coprime` (see #38339 for a use case). 🤖 Co-Authored with [Claude Code](https://claude.com/claude-code) t-data 10/7 Mathlib/Data/ZMod/Coprime.lean,Mathlib/Data/ZMod/Units.lean 2 3 ['github-actions', 'joneugster', 'xroblot'] joneugster
assignee:joneugster
1-27463
1 day ago
6-40259
6 days ago
29-26172
29 days
39192 jayscambler
author:jayscambler
 feat(InnerProductSpace/PiL2): det of a linear isometry has unit norm Adds `LinearIsometryEquiv.norm_det` and the real corollary `LinearIsometryEquiv.abs_det`. The proof uses the unitary matrix of a linear isometry in orthonormal bases, via `LinearIsometryEquiv.toMatrix_mem_unitaryGroup` and `Matrix.det_of_mem_unitary`. The supporting matrix lemma is moved from `Adjoint.lean` to `PiL2.lean`, where it no longer depends on adjoints. t-analysis new-contributor LLM-generated awaiting-author 36/10 Mathlib/Analysis/InnerProductSpace/Adjoint.lean,Mathlib/Analysis/InnerProductSpace/PiL2.lean 2 8 ['github-actions', 'grunweg', 'jayscambler', 'sgouezel', 'themathqueen', 'wwylele'] sgouezel
assignee:sgouezel
1-27119
1 day ago
1-27119
1 day ago
10-9493
10 days
39357 joelriou
author:joelriou
 feat(AlgebraicTopology/SimplicialSet): the pushout-product of a mono and an anodyne extension is an anodyne extension Co-authored-by: Jack McKoen --- - [x] depends on: #39466 - [x] depends on: #39464 - [ ] depends on: #39298 - [ ] depends on: #39462 - [ ] depends on: #39463 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebraic-topology WIP blocked-by-other-PR large-import 1142/11 Mathlib.lean,Mathlib/AlgebraicTopology/RelativeCellComplex/Basic.lean,Mathlib/AlgebraicTopology/SimplicialSet/AnodyneExtensions/PairingCore.lean,Mathlib/AlgebraicTopology/SimplicialSet/AnodyneExtensions/PushoutProduct.lean,Mathlib/AlgebraicTopology/SimplicialSet/AnodyneExtensions/Rank.lean,Mathlib/AlgebraicTopology/SimplicialSet/AnodyneExtensions/RankNat.lean,Mathlib/AlgebraicTopology/SimplicialSet/AnodyneExtensions/UnionProd.lean,Mathlib/AlgebraicTopology/SimplicialSet/CategoryWithFibrations.lean,Mathlib/AlgebraicTopology/SimplicialSet/Monoidal.lean,Mathlib/AlgebraicTopology/SimplicialSet/Nonsingular.lean,Mathlib/AlgebraicTopology/SimplicialSet/PushoutProduct.lean,Mathlib/AlgebraicTopology/SimplicialSet/StdSimplex.lean,Mathlib/CategoryTheory/SmallObject/TransfiniteCompositionLifting.lean,docs/references.bib 14 3 ['github-actions', 'mathlib-dependent-issues', 'mathlib-merge-conflicts'] dagurtomas
assignee:dagurtomas
1-26818
1 day ago
8-42968
8 days ago
0-2
2 seconds
37245 DavidLedvinka
author:DavidLedvinka
 feat(MeasureTheory): add Resolvent (Stieltjes/Cauchy) Transform This PR adds the definition of the `resolventTransform` of a measure and some API. This is a non-standard notion that generalizes both the Stieltjes Transform and Cauchy Transform of a (real-valued) measure so that (for example) the proof that these transforms define holomorphic functions off the support of the measure can be given for both at once. Perhaps these important special cases could be made into abbrevs? - [ ] depends on: #37172 t-measure-probability 195/0 Mathlib.lean,Mathlib/Algebra/Algebra/Spectrum/Basic.lean,Mathlib/Analysis/Calculus/Deriv/Basic.lean,Mathlib/MeasureTheory/Measure/ResolventTransform.lean,Mathlib/MeasureTheory/Measure/Support.lean 5 19 ['DavidLedvinka', 'EtienneC30', 'github-actions', 'mathlib-dependent-issues', 'mathlib-merge-conflicts'] EtienneC30
assignee:EtienneC30
1-26585
1 day ago
1-26608
1 day ago
32-56362
32 days
39419 tb65536
author:tb65536
 feat(Dynamics/FixedPoints/Support): define the fixed support of a self-map This PR defines the fixed support of a self-map to be the closure of the complement of the set of fixed points. This notion arises in dynamics. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-topology t-dynamics 77/1 Mathlib.lean,Mathlib/Dynamics/FixedPoints/Basic.lean,Mathlib/Dynamics/FixedPoints/Defs.lean,Mathlib/Dynamics/FixedPoints/Support.lean 4 2 ['github-actions', 'tb65536'] nobody
1-26019
1 day ago
7-16998
7 days ago
7-16710
7 days
39586 thomaskwaring
author:thomaskwaring
 feat: GraphLike typeclass A proposal for a typeclass representing `GraphLike` objects. This is axiomatised in terms of a relations `IsSource` and `IsTarget` between edges and vertices, as well as `IsLink` to represent walks of length one. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-combinatorics new-contributor 539/0 Mathlib/Combinatorics/GraphLike/Basic.lean,Mathlib/Combinatorics/GraphLike/Walk.lean 2 4 ['SnirBroshi', 'eric-wieser', 'github-actions'] nobody
1-24988
1 day ago
unknown
0-0
0 seconds
39657 mcdoll
author:mcdoll
 feat(Algebra): add abstract `prod_apply` and `FunLike.coe_prod` Follow-up of #37779, where abstract `IsApply` classes were introduced. Now, we can prove a generic `sum_apply` lemma and in following PRs this will replace specific ones in function spaces. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra
label:t-algebra$
 25/5 Mathlib/Algebra/BigOperators/Pi.lean,Mathlib/Analysis/Calculus/FDeriv/Add.lean,Mathlib/Data/Matrix/PEquiv.lean,Mathlib/LinearAlgebra/Matrix/Polynomial.lean,Mathlib/LinearAlgebra/QuadraticForm/Dual.lean 5 2 ['github-actions', 'mcdoll'] nobody
1-24408
1 day ago
1-25012
1 day ago
1-24723
1 day
38466 Thmoas-Guan
author:Thmoas-Guan
 feat(ModuleCat): some lemmas for `Ext` over `ModuleCat` some lemmas for `Ext` over `ModuleCat` --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-ring-theory large-import 71/0 Mathlib.lean,Mathlib/Algebra/Category/ModuleCat/Basic.lean,Mathlib/Algebra/Category/ModuleCat/Ext/Basic.lean,Mathlib/RingTheory/Ideal/Maps.lean 4 14 ['Thmoas-Guan', 'chrisflav', 'github-actions', 'robin-carlier'] chrisflav
assignee:chrisflav
1-22361
1 day ago
1-22361
1 day ago
27-5669
27 days
34031 lua-vr
author:lua-vr
 feat(Dynamics/BirkhoffSum): add the maximal ergodic theorem Proves the maximal ergodic theorem for a measure-preserving map `f` and an integrable function `g`. The maximal ergodic operator `birkhoffAverageSup f g x` is defined as the supremum of the Birkhoff averages of `g` over all `n`. The PR also shows some results about the auxiliary definition `birkhoffMax f g n`, defined as the maximum of the Birkhoff sums ranging between `0` and `n`. Main results: * `distribution_birkhoffAverageSup_le_integral`: the cumulative distribution function of `birkhoffAverageSup` at `a` is less than or equal to the integral of `g` on the set where `a < birkhoffAverageSup f g x`. * `iSup_distribution_birkhoffAverageSup_le_norm`: the operator `birkhoffAverageSup` satisfies a weak-type inequality. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-dynamics 331/0 Mathlib.lean,Mathlib/Data/EReal/Basic.lean,Mathlib/Dynamics/BirkhoffSum/Integrable.lean,Mathlib/Dynamics/BirkhoffSum/Maximal.lean,Mathlib/Dynamics/BirkhoffSum/Measurable.lean,Mathlib/Order/PartialSups.lean 6 4 ['github-actions', 'lua-vr', 'mathlib-bors', 'mathlib-merge-conflicts'] nobody
1-20674
1 day ago
35-46530
35 days ago
42-71171
42 days
39630 urkud
author:urkud
 feat(Sheaves/EtaleSpace): new file Written for the Cauchy integral theorem project at ICERM. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-topology 164/0 Mathlib.lean,Mathlib/Topology/Sheaves/EtaleSpace.lean 2 2 ['github-actions', 'mathlib-bors'] nobody
1-20212
1 day ago
1-20279
1 day ago
1-20001
1 day
38319 Zetetic-Dhruv
author:Zetetic-Dhruv
 feat(Combinatorics/SetFamily): Assouad's dual VC bound Adds the Finset-level form of Assouad's 1983 dual VC bound: if a family `𝒜 : Finset (Finset α)` has VC dimension at most `d`, then for any ground set `X : Finset α` the dual family `{𝒜.filter (· ∋ x) : x ∈ X}` has VC dimension at most `2 ^ (d + 1) - 1`. New declarations (in `Finset` namespace): - `dualFamily 𝒜 X`: for each `x ∈ X`, the subfamily `{A ∈ 𝒜 | x ∈ A}` - `mem_dualFamily` (`@[simp]`): membership characterisation - `exists_shatters_of_dualFamily_shatters`: Assouad's bitstring-coding lemma - `vcDim_dualFamily_le`: the headline VC bound Proof by Assouad's classical bitstring-coding argument. Sits on top of `Finset.shatterer` / `Finset.vcDim` from `Mathlib.Combinatorics.SetFamily.Shatter`. References: - P. Assouad, Densite et dimension, Ann. Inst. Fourier 33(3) (1983), Thm 2.13 - J. Matousek, Lectures on Discrete Geometry, GTM 212, Springer, 2002, Section 10.3 Lemma 10.3.3 --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-combinatorics new-contributor 199/0 Mathlib.lean,Mathlib/Combinatorics/SetFamily/DualVC.lean,docs/references.bib 3 37 ['Shreyas4991', 'YaelDillies', 'Zetetic-Dhruv', 'github-actions'] nobody
1-19773
1 day ago
13-2006
13 days ago
29-48766
29 days
39641 vihdzp
author:vihdzp
 chore(SetTheory/Cardinality/Cofinality/Club): use `namespace` I meant to do this in #37677, but forgot to do `git push`. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-set-theory easy 21/18 Mathlib/SetTheory/Cardinal/Cofinality/Club.lean 1 1 ['github-actions'] j-loreaux
assignee:j-loreaux
1-19287
1 day ago
1-58260
1 day ago
1-58011
1 day
39450 FLDutchmann
author:FLDutchmann
 feat(Asymptotics): define (d)elaborator for asymptotic notation --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-meta 873/0 Mathlib/Tactic/Asymptotics/Basic.lean,Mathlib/Tactic/Asymptotics/Init.lean 2 2 ['github-actions', 'mathlib-bors'] nobody
1-19106
1 day ago
6-79644
6 days ago
0-16
16 seconds
37189 Brian-Nugent
author:Brian-Nugent
 feat(AlgebraicGeometry): The pushforward of a quasi-coherent sheaf between affines is quasi-coherent To be more precise, we show that if `AlgebraicGeometry.Scheme.Modules.fromTildeΓ` is an isomorphism then the same holds for the pushforward. This will show that being quasicoherent is stable under pushforward for affine morphisms once it is shown that `AlgebraicGeometry.Scheme.Modules.fromTildeΓ` being an isomorphism is equivalent to being quasicoherent. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebraic-geometry maintainer-merge 215/6 Mathlib/Algebra/Category/ModuleCat/Localization.lean,Mathlib/Algebra/Category/ModuleCat/Sheaf.lean,Mathlib/Algebra/Category/ModuleCat/Sheaf/PushforwardContinuous.lean,Mathlib/Algebra/Module/LocalizedModule/Basic.lean,Mathlib/AlgebraicGeometry/Modules/Sheaf.lean,Mathlib/AlgebraicGeometry/Modules/Tilde.lean,Mathlib/Topology/Sheaves/SheafCondition/Sites.lean 7 49 ['Brian-Nugent', 'chrisflav', 'github-actions', 'joelriou'] adamtopaz and chrisflav
assignee:adamtopaz assignee:chrisflav
1-18245
1 day ago
2-930
2 days ago
36-19919
36 days
39008 MichaelStollBayreuth
author:MichaelStollBayreuth
 feat(NumberTheory/NumberField/Completion/FinitePlace): add multiplicity lemmas This adds some more API for multiplicities of prime ideals in factorizations (and some more basic API lemmas, too), in preparation for a proof of the Northcott property for heights on number fields. We also extend the API for `HasFinite{Mul|}Support` a bit. --- - [x] depends on: #38654 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-number-theory large-import maintainer-merge 113/1 Mathlib/Algebra/FiniteSupport/Basic.lean,Mathlib/NumberTheory/NumberField/Completion/FinitePlace.lean,Mathlib/RingTheory/Algebraic/Integral.lean,Mathlib/RingTheory/DedekindDomain/Ideal/Lemmas.lean,Mathlib/RingTheory/UniqueFactorizationDomain/Multiplicity.lean 5 43 ['MichaelStollBayreuth', 'github-actions', 'mathlib-dependent-issues', 'tb65536'] tb65536
assignee:tb65536
1-16338
1 day ago
2-31986
2 days ago
11-39333
11 days
39127 MichaelStollBayreuth
author:MichaelStollBayreuth
 feat(NumberTheory/Height/NumberField): add lemma on "finite part" of mulHeight This PR adds ```lean lemma absNorm_mul_finprod_finitePlace_eq_one {K ι : Type*} [Field K] [NumberField K] [Finite ι] {x : ι → 𝓞 K} (hx : x ≠ 0) : (Ideal.span <| Set.range x).absNorm * ∏ᶠ v : FinitePlace K, ⨆ i, v (x i) = 1 ``` Because we need it in the proof, we also add a new file Mathlib.Algebra.Order.Hom.Lattice that contains an API lemma that allows reducing the type over which an `iSup` is taken to a subtype. --- - [ ] depends on: #39008 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-number-theory blocked-by-other-PR large-import 180/1 Mathlib.lean,Mathlib/Algebra/FiniteSupport/Basic.lean,Mathlib/Algebra/Order/Hom/Lattice.lean,Mathlib/NumberTheory/Height/NumberField.lean,Mathlib/NumberTheory/NumberField/Completion/FinitePlace.lean,Mathlib/RingTheory/Algebraic/Integral.lean,Mathlib/RingTheory/DedekindDomain/Ideal/Lemmas.lean,Mathlib/RingTheory/UniqueFactorizationDomain/Multiplicity.lean 8 8 ['MichaelStollBayreuth', 'github-actions', 'mathlib-dependent-issues', 'tb65536'] nobody
1-16287
1 day ago
13-5680
13 days ago
0-999
16 minutes
39665 justus-springer
author:justus-springer
 feat(AlgebraicGeometry/AffineSpace): affine space over an integral base is integral Prove that `AffineSpace` inherits the properties `IrreducibleSpace`, `IsReduced` and `IsIntegral` from its base. Also clean up a few variables, that were used very scarcely. These were causing weird issues in these new instances, where they would be automatically included. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebraic-geometry 33/12 Mathlib/AlgebraicGeometry/AffineSpace.lean 1 1 ['github-actions'] nobody
1-14326
1 day ago
1-14407
1 day ago
1-14118
1 day
39298 joelriou
author:joelriou
 feat(AlgebraicTopology/SimplicialSet): the pushout-product of a horn inclusion and a boundary inclusion is an anodyne extension In this PR, we construct a regular pairing for the union of `Λ[m + 1, l] ⊗ ∂Δ[n]` and ` Δ[m + 1] ⊗ ∂Δ[n]` in `Δ[m + 1] ⊗ Δ[n]`. It follows immediately that the inclusion of this subcomplex is an anodyne extension. --- - [ ] depends on: #39462 - [ ] depends on: #39463 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebraic-topology WIP large-import blocked-by-other-PR 898/5 Mathlib.lean,Mathlib/AlgebraicTopology/SimplicialSet/AnodyneExtensions/PairingCore.lean,Mathlib/AlgebraicTopology/SimplicialSet/AnodyneExtensions/Rank.lean,Mathlib/AlgebraicTopology/SimplicialSet/AnodyneExtensions/RankNat.lean,Mathlib/AlgebraicTopology/SimplicialSet/AnodyneExtensions/UnionProd.lean,Mathlib/AlgebraicTopology/SimplicialSet/Monoidal.lean,Mathlib/AlgebraicTopology/SimplicialSet/Nonsingular.lean,Mathlib/AlgebraicTopology/SimplicialSet/StdSimplex.lean,docs/references.bib 9 8 ['dagurtomas', 'github-actions', 'joelriou', 'mathlib-dependent-issues'] nobody
1-12405
1 day ago
9-34644
9 days ago
0-2
2 seconds
39592 chrisflav
author:chrisflav
 feat(CategoryTheory/Sites): a cover preserving functor that preserves pullbacks preserves `1`-hypercovers --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-category-theory maintainer-merge 85/0 Mathlib/CategoryTheory/Sites/Continuous.lean,Mathlib/CategoryTheory/Sites/CoverPreserving.lean,Mathlib/CategoryTheory/Sites/Hypercover/One.lean 3 5 ['dagurtomas', 'github-actions'] nobody
1-11848
1 day ago
3-5270
3 days ago
3-4981
3 days
38553 Whysoserioushah
author:Whysoserioushah
 feat(RepresentationTheory/Homological): define Tate cohomology co-authored-by : class field theory team --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra CFT awaiting-author
label:t-algebra$
 267/1 Mathlib.lean,Mathlib/RepresentationTheory/Homological/GroupCohomology/LongExactSequence.lean,Mathlib/RepresentationTheory/Homological/GroupHomology/LongExactSequence.lean,Mathlib/RepresentationTheory/Homological/TateCohomology/Basic.lean 4 42 ['Multramate', 'Whysoserioushah', 'dagurtomas', 'faenuccio', 'github-actions', 'kbuzzard', 'riccardobrasca'] dagurtomas, faenuccio, mariainesdff
assignee:dagurtomas assignee:faenuccio assignee:mariainesdff
1-11777
1 day ago
1-65507
1 day ago
22-71351
22 days
39663 Raph-DG
author:Raph-DG
 feat(Topology): A spectral map between quasi-separated, prespectral sober spaces has compact fibers In this PR, we develop some API around the constructible topology, culminating in the fact that a spectral map between quasi-separated, prespectral sober spaces has compact fibers. To see why this might be of interest, note that the analogous theorem in algebraic geometry (that a quasiseparated map between schemes has quasicompact fibers) does not require any global separatedness assumptions, and the proof of this is very algebraic. So we have the somewhat mysterious situation that it seems as though there are nontrvial topological restrictions on the kinds of spectral maps which can be the underlying maps of morphisms of schemes. This PR was originally part of #26304, a PR on pushforwards of algebraic cycles. This is where the notion of compactness of fibers becomes relevant, as this guarantees each coefficient of the pushforward of a cycle is computed by a finite sum. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-topology 116/0 Mathlib/Topology/Compactness/Compact.lean,Mathlib/Topology/Constructible.lean,Mathlib/Topology/Maps/Proper/Basic.lean,Mathlib/Topology/Spectral/ConstructibleTopology.lean 4 1 ['github-actions'] nobody
1-11669
1 day ago
1-11756
1 day ago
1-11568
1 day
26304 Raph-DG
author:Raph-DG
 feat(AlgebraicGeometry): Pushforward of algebraic cycles In this PR we define a notion of the "pushfoward of functions with locally finite support". We give this PR the suggestive title "pushforward of algebraic cycles" because we will go on to model algebraic cycles on a scheme X as functions from X to the integers with locally finite support. - [x] depends on: #26225 - [x] depends on: #26259 - [x] depends on: #35807 --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebraic-geometry 102/0 Mathlib.lean,Mathlib/Topology/LocallyFinsupp.lean,Mathlib/Topology/LocallyFinsupp/Pushforward.lean 3 53 ['Raph-DG', 'chrisflav', 'github-actions', 'joelriou', 'leanprover-community-bot-assistant', 'mathlib-dependent-issues', 'mathlib-merge-conflicts'] joelriou
assignee:joelriou
1-8836
1 day ago
1-8836
1 day ago
39-1864
39 days
33288 vihdzp
author:vihdzp
 chore(Combinatorics/SimpleGraph/Paths): review API This PR does the following: - Add `grind` annotations. - Rename theorems `X_isY` to the more idiomatic `isY_X`. - Remove many redundant namespaces. - Golf accordingly. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-combinatorics 156/126 Mathlib/Combinatorics/SimpleGraph/Acyclic.lean,Mathlib/Combinatorics/SimpleGraph/Connectivity/Connected.lean,Mathlib/Combinatorics/SimpleGraph/Matching.lean,Mathlib/Combinatorics/SimpleGraph/Metric.lean,Mathlib/Combinatorics/SimpleGraph/Paths.lean,Mathlib/Combinatorics/SimpleGraph/Walk/Maps.lean 6 4 ['github-actions', 'mathlib-merge-conflicts', 'mathlib4-merge-conflict-bot'] b-mehta
assignee:b-mehta
1-7881
1 day ago
1-7812
1 day ago
47-81907
47 days
38337 Jun2M
author:Jun2M
 feat(Combinatorics/Graph): supremum This PR introduces the union of `Graph`, as `sup`. Due to compatibility issue, in general, `sup` is not very well-behaved: `SemilatticeSup` is not true. In the case of incompatible edge, unlike `inf` which simply removed such edge, we include it following its incidence in the left graph. This has the benefit of associativity being true in general at the cost of commutativity. Assuming compatibility or existence of mutual supergraph, which are shown to be equivalent in this PR, everything behaves nicely. Co-authored-by: Peter Nelson --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-combinatorics 86/1 Mathlib/Combinatorics/Graph/Lattice.lean 1 3 ['github-actions', 'mathlib-bors', 'vihdzp'] nobody
1-7663
1 day ago
1-7665
1 day ago
30-18848
30 days
36472 EtienneC30
author:EtienneC30
 feat: finite dimensional distribution of Brownian motion Define `gaussianProjectiveFamily : (I : Finset ℝ≥0) → Measure (I → ℝ)`. Each `gaussianProjectiveFamily I` is the centered Gaussian measure over `I → ℝ` with covariance matrix given by `brownianCovMatrix I s t := min s t`. Prove that these measures satisfy `IsProjectiveMeasureFamily`, which means that they can be extended into a measure over `ℝ≥0 → ℝ` thanks to the Kolmogorov's extension theorem (not in Mathlib yet). The obtained measure is a measure over the set of real processes indexed by `ℝ≥0` and is the law of the Brownian motion. --- - [x] depends on: #36143 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) brownian t-measure-probability large-import 236/1 Mathlib.lean,Mathlib/MeasureTheory/Function/L2Space.lean,Mathlib/Probability/BrownianMotion/GaussianProjectiveFamily.lean,Mathlib/Probability/Distributions/Gaussian/HasGaussianLaw/Basic.lean,Mathlib/Probability/Moments/Basic.lean 5 5 ['EtienneC30', 'github-actions', 'mathlib-dependent-issues', 'sgouezel'] sgouezel
assignee:sgouezel
1-7472
1 day ago
1-7439
1 day ago
67-20901
67 days
38830 Jun2M
author:Jun2M
 feat(Data/List): Nodup and head & getLast lemmas Given a Nodup list: * If a prefix contains the last element, they are equal * If a suffix contains the first element, they are equal * If an infix contains the first element, it is a prefix * If an infix contains the last element, it is a suffix * If the first and the last element are the same, it is a singleton * `countP` is cardinality of the filter of `toFinset`. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-data 29/0 Mathlib/Data/Finset/Card.lean,Mathlib/Data/List/Nodup.lean 2 7 ['SnirBroshi', 'github-actions', 'mathlib-merge-conflicts'] nobody
1-7457
1 day ago
1-7495
1 day ago
16-78417
16 days
39536 robin-carlier
author:robin-carlier
 feat(CategoryTheory/Bicategory): Spans with left and right legs satisfying given morphism properties In this PR, we define a structure `Span Wₗ Wᵣ c c'` which bundles the data of spans in `C` from `c` to `c'` where the left map satisfies `Wₗ` and the right map satisfies `Wᵣ`. When `Wₗ` and `Wᵣ` are adequate, we define the identity span and the composition of compatible spans. In a later pull request, this will be extended to be the 1-morphisms of a bicategory structure on a type alias of `C`. From [SymmMonCoherence](https://github.com/robin-carlier/SymmMonCoherence) --- - [x] depends on: #39534 - [x] depends on: #39647 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-category-theory maintainer-merge 149/8 Mathlib.lean,Mathlib/CategoryTheory/Bicategory/Span/Basic.lean,Mathlib/CategoryTheory/MorphismProperty/Limits.lean 3 10 ['dagurtomas', 'github-actions', 'mathlib-dependent-issues', 'robin-carlier'] nobody
1-6407
1 day ago
1-40072
1 day ago
1-40446
1 day
39672 tb65536
author:tb65536
 feat(RingTheory/Ideal/GoingUp): a prime ideal is minimal over the image of its preimage This PR proves that if `A/R` is integral and if `I` is a prime ideal of `A`, then `I` is a minimal prime over the image of its preimage in `R`. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-ring-theory t-algebra
label:t-algebra$
 6/0 Mathlib/RingTheory/Ideal/GoingUp.lean 1 1 ['github-actions'] nobody
1-4408
1 day ago
1-4408
1 day ago
1-4121
1 day
39671 tb65536
author:tb65536
 feat(Data/ENat/Basic): add `ENat.toNat_pos` This PR adds a missing lemma `ENat.toNat_pos`. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra t-data
label:t-algebra$
 4/0 Mathlib/Data/ENat/Basic.lean 1 1 ['github-actions'] nobody
1-3534
1 day ago
1-3534
1 day ago
1-3247
1 day
39223 BryceT233
author:BryceT233
 feat(RingTheory/Extension): surjectivity and kernel of `Cotangent.map` This PR adds `Cotangent.map_surjective_of_comap_eq` and `Cotangent.map_ker_of_surjective`, which are adaptations of the existing lemmas `Ideal.mapCotangent_surjective_of_comap_eq` and `Ideal.mapCotangent_ker_of_surjective` to the cotangent space of extensions. Because `Algebra.Extension.Cotangent` uses a type synonym to define the cotangent space of an extension, the results for `Ideal.mapCotangent` could not be used directly and needed to be restated in terms of `Algebra.Extension.Cotangent.map`. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-ring-theory 32/0 Mathlib/RingTheory/Extension/Basic.lean 1 1 ['github-actions'] nobody
0-85357
23 hours ago
11-379
11 days ago
11-90
11 days
39659 rwst
author:rwst
 feat(Combinatorics/Enumerative): GeneratingFunction/Defs.lean (1/13) This file is part of my plan for a "Combinatorial Class" implementing the infrastructure to associate combinatorial object enumeration with their generating function, as described in Flajolet-Sedgewick. Opus 4.7 made the choice of finite fibers and wrote the Lean code. I looked at every line and learned. Zulip commenters pointed at missing functionality. I made design decisions, in particular removal of structures in favor of functional lemmas and definitions, so after all, the "Combinatorial Class" stays undefined. I also removed lots of superfluous docstring text from all files. As to the commits, Opus has no rights to use git on my machine. Co-Authored-By: Claude Opus 4.7 (1M context) --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-combinatorics LLM-generated 129/0 Mathlib.lean,Mathlib/Combinatorics/Enumerative/GeneratingFunction/Defs.lean 2 1 ['github-actions'] nobody
0-84493
23 hours ago
1-23252
1 day ago
1-22963
1 day
39660 rwst
author:rwst
 feat(Combinatorics/Enumerative): GeneratingFunction/ part 2/13 - [ ] depends on: #39659 Please see my declaration of collaboration there. blocked-by-other-PR t-combinatorics LLM-generated 185/0 Mathlib.lean,Mathlib/Combinatorics/Enumerative/GeneratingFunction/Defs.lean,Mathlib/Combinatorics/Enumerative/GeneratingFunction/Sum.lean 3 2 ['github-actions', 'mathlib-dependent-issues'] nobody
0-84479
23 hours ago
1-21906
1 day ago
0-348
5 minutes
39661 rwst
author:rwst
 feat(Combinatorics/Enumerative): GeneratingFunction/ part 3/13 - [ ] depends on: #39660 Please see my declaration of collaboration at #39659. blocked-by-other-PR t-combinatorics LLM-generated 283/0 Mathlib.lean,Mathlib/Combinatorics/Enumerative/GeneratingFunction/Defs.lean,Mathlib/Combinatorics/Enumerative/GeneratingFunction/Prod.lean,Mathlib/Combinatorics/Enumerative/GeneratingFunction/Sum.lean 4 2 ['github-actions', 'mathlib-dependent-issues'] nobody
0-84474
23 hours ago
1-21877
1 day ago
0-208
3 minutes
39634 SnirBroshi
author:SnirBroshi
 feat(LinearAlgebra/Matrix/Nondegenerate): more API and generalize to non-domains - Syntactically generalize the bilinear form identities to non-square matrices - Prove iff and transpose theorems for `SeparatingLeft`/`SeparatingRight`/`Nondegenerate` - Prove `M *ᵥ v = 0 → v = 0` and `v ᵥ* M = 0 → v = 0` given `Nondegenerate` (extracted from the existing `eq_zero_of_*_eq_zero`) - Generalize `M.det ≠ 0 → M.Nondegenerate` to `M.det ∈ R⁰ → M.Nondegenerate` (over any `CommRing`) - Add `M *ᵥ v = 0 → v = 0` and `v ᵥ* M = 0 → v = 0` theorems given `M.det ∈ R⁰` - Allow `NonUnitalNonAssocSemiring`s in the `def`s --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra
label:t-algebra$
 125/28 Mathlib/Data/Matrix/Mul.lean,Mathlib/LinearAlgebra/Matrix/Nondegenerate.lean,Mathlib/LinearAlgebra/Matrix/ToLinearEquiv.lean 3 6 ['SnirBroshi', 'github-actions', 'themathqueen'] nobody
0-83457
23 hours ago
1-7356
1 day ago
1-80367
1 day
39677 grunweg
author:grunweg
 feat: improve doc-strings for differential geometry elaborators Right now, the custom elaborators in the manifold library have doc-strings which explain what the elaborator expands to --- but don't show what the expanded concept means. It would be much better to show that also. Verso allows doing so easily: this PR implements this as a proof of concept for the elaborator for `mvfderiv`. This is not ready to land yet: - the verso command defined currently works outside the module system, but not inside yet (this is because of a core bug fixed yesterday; it will be fixed in the next Lean release) - the verso command should move to a better place (at least `Geometry/Manifold/Notation.lean`, perhaps even lower) - Right now, the concatenated doc-string is formatted as pure text (not markdown): Lean core will implement this soon, but has not done so yet. - this technique should be applied to all the custom elaborators - the doc-strings of the elaborators may need to be rewritten, to start with the subject they're defining. (Once this happens, just concatenating the doc-strings produces reasonable results. This PR does this for mvfderiv only.) Made with in-person help of David Thrane Christiansen at the MI retreat. Thanks a lot! --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) WIP blocked-by-core-release t-differential-geometry t-meta 463/1 Mathlib/Geometry/Manifold/MFDeriv/NormedSpace.lean,Mathlib/Geometry/Manifold/MFDeriv/NormedSpaceVersoPoC.lean 2 1 ['github-actions'] nobody
0-82901
23 hours ago
0-83029
22 hours ago
0-1
1 second
37968 yuanyi-350
author:yuanyi-350
 refactor(Analysis): golf 100 files This PR is an experimental project. In this PR, we use an Agent to automatically scan and attempt to simplify proofs. We hope to eventually effectively golf 100 files and avoid reinventing the wheel in mathlib. We have chosen `Mathlib/Analysis` as the testing ground. If this experiment is very successful and accepted by the mathlib community, we would be honored to open source it. The relevant projects includes - [ ] #38104, which golfs `Mathlib/MeasureTheory`. - [ ] #38144, which golfs `Mathlib/NumberTheory`. This PR serves as an index. For the actual code review, please refer to the individual PRs linked below. Each of those PRs modifies only a single file to facilitate the review process. - [ ] depends on: #37555 - [ ] depends on: #37731 - [ ] depends on: #37737 - [ ] depends on: #37754 - [ ] depends on: #37785 - [ ] depends on: #37788 - [ ] depends on: #37821 - [ ] depends on: #37876 - [ ] depends on: #37981 - [ ] depends on: #37987 - [ ] depends on: #37989 - [ ] depends on: #37991 - [ ] depends on: #38006 - [ ] depends on: #38010 - [ ] depends on: #38272 - [ ] depends on: #38273 - [ ] depends on: #38274 - [ ] depends on: #38352 - [ ] depends on: #38404 - [ ] depends on: #38435 - [ ] depends on: #38436 - [ ] depends on: #38437 - [ ] depends on: #38493 - [ ] depends on: #38513 - [ ] depends on: #38638 - [ ] depends on: #38646 - [ ] depends on: #39171 - [ ] depends on: #39182 - [ ] depends on: #39183 - [ ] depends on: #39184 - [ ] depends on: #39187 - [ ] depends on: #39188 --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) codex WIP t-analysis LLM-generated large-import blocked-by-other-PR 374/802 Mathlib/Analysis/Analytic/Basic.lean,Mathlib/Analysis/Analytic/CPolynomialDef.lean,Mathlib/Analysis/Analytic/Composition.lean,Mathlib/Analysis/Analytic/Constructions.lean,Mathlib/Analysis/Analytic/ConvergenceRadius.lean,Mathlib/Analysis/Analytic/Order.lean,Mathlib/Analysis/Analytic/Within.lean,Mathlib/Analysis/AperiodicOrder/Delone/Basic.lean,Mathlib/Analysis/Asymptotics/AsymptoticEquivalent.lean,Mathlib/Analysis/Asymptotics/Defs.lean,Mathlib/Analysis/Asymptotics/ExpGrowth.lean,Mathlib/Analysis/Asymptotics/SpecificAsymptotics.lean,Mathlib/Analysis/Asymptotics/SuperpolynomialDecay.lean,Mathlib/Analysis/BoxIntegral/Basic.lean,Mathlib/Analysis/BoxIntegral/Partition/Split.lean,Mathlib/Analysis/CStarAlgebra/ContinuousFunctionalCalculus/Unique.lean,Mathlib/Analysis/CStarAlgebra/Unitization.lean,Mathlib/Analysis/Calculus/FDeriv/Measurable.lean,Mathlib/Analysis/Complex/CauchyIntegral.lean,Mathlib/Analysis/Complex/Exponential.lean,Mathlib/Analysis/Complex/Isometry.lean,Mathlib/Analysis/Complex/OperatorNorm.lean,Mathlib/Analysis/Complex/UpperHalfPlane/MoebiusAction.lean,Mathlib/Analysis/Complex/ValueDistribution/LogCounting/Asymptotic.lean,Mathlib/Analysis/Complex/ValueDistribution/LogCounting/Basic.lean,Mathlib/Analysis/ConstantSpeed.lean,Mathlib/Analysis/Convex/Basic.lean,Mathlib/Analysis/Convex/BetweenList.lean,Mathlib/Analysis/Convex/Birkhoff.lean,Mathlib/Analysis/Convex/Body.lean,Mathlib/Analysis/Convex/Cone/Extension.lean,Mathlib/Analysis/Convex/Continuous.lean,Mathlib/Analysis/InnerProductSpace/LinearPMap.lean,Mathlib/Analysis/Normed/Lp/SmoothApprox.lean,Mathlib/Analysis/Normed/Lp/WithLp.lean,Mathlib/Analysis/Normed/Module/Basic.lean,Mathlib/Analysis/Normed/Module/ContinuousInverse.lean,Mathlib/Analysis/Normed/Module/Convex.lean,Mathlib/Analysis/Normed/Module/HahnBanach.lean,Mathlib/Analysis/Normed/Module/MStructure.lean,Mathlib/Analysis/Normed/Module/MultipliableUniformlyOn.lean,Mathlib/Analysis/Normed/Module/RieszLemma.lean,Mathlib/Analysis/Normed/Operator/Bilinear.lean,Mathlib/Analysis/Normed/Operator/BoundedLinearMaps.lean,Mathlib/Analysis/Normed/Operator/ContinuousLinearMap.lean,Mathlib/Analysis/Normed/Operator/Extend.lean,Mathlib/Analysis/Normed/Operator/NNNorm.lean,Mathlib/Analysis/Normed/Ring/Basic.lean,Mathlib/Analysis/Normed/Ring/Lemmas.lean,Mathlib/Analysis/Normed/Unbundled/AlgebraNorm.lean,Mathlib/Analysis/Normed/Unbundled/FiniteExtension.lean,Mathlib/Analysis/Normed/Unbundled/SeminormFromBounded.lean,Mathlib/Analysis/Normed/Unbundled/SeminormFromConst.lean,Mathlib/Analysis/Normed/Unbundled/SpectralNorm.lean,Mathlib/Analysis/ODE/Transform.lean,Mathlib/Analysis/PSeries.lean,Mathlib/Analysis/SpecialFunctions/Complex/Arg.lean,Mathlib/Analysis/SpecialFunctions/Complex/LogBounds.lean,Mathlib/Analysis/SpecialFunctions/ContinuousFunctionalCalculus/Rpow/IntegralRepresentation.lean,Mathlib/Analysis/SpecialFunctions/Elliptic/Weierstrass.lean,Mathlib/Analysis/SpecialFunctions/Gamma/Basic.lean,Mathlib/Analysis/SpecialFunctions/Gamma/BohrMollerup.lean,Mathlib/Analysis/SpecialFunctions/Gaussian/GaussianIntegral.lean,Mathlib/Analysis/SpecialFunctions/Gaussian/PoissonSummation.lean,Mathlib/Analysis/SpecialFunctions/Log/ENNRealLog.lean,Mathlib/Analysis/SpecialFunctions/Log/PosLog.lean,Mathlib/Analysis/SpecialFunctions/Log/RpowTendsto.lean,Mathlib/Analysis/SpecialFunctions/MulExpNegMulSqIntegral.lean,Mathlib/Analysis/SpecialFunctions/Pow/Continuity.lean,Mathlib/Analysis/SpecialFunctions/Trigonometric/Angle.lean 70 25 ['CoolRmal', 'Parcly-Taxel', 'euprunin', 'github-actions', 'leanprover-radar', 'mathlib-dependent-issues', 'mathlib-merge-conflicts', 'themathqueen', 'yuanyi-350'] nobody
0-79393
22 hours ago
39-74708
39 days ago
0-26
26 seconds
36775 ADedecker
author:ADedecker
 feat: flip arguments for continuous linear maps under finite dimension assumptions --- - [x] depends on: #36776 - [x] depends on: #36870 - [ ] depends on: #37435 - [ ] depends on: #37439 - [x] depends on: #37614 - [ ] depends on: #38168 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-topology blocked-by-other-PR merge-conflict 540/32 Mathlib.lean,Mathlib/Analysis/Normed/Module/FiniteDimension.lean,Mathlib/Topology/Algebra/Module/Equiv.lean,Mathlib/Topology/Algebra/Module/Spaces/CompactConvergenceCLM.lean,Mathlib/Topology/Algebra/Module/Spaces/ContinuousLinearMap.lean,Mathlib/Topology/Algebra/Module/Spaces/FiniteDimensionCLM.lean,Mathlib/Topology/Algebra/Module/Spaces/UniformConvergenceCLM.lean 7 10 ['ADedecker', 'eric-wieser', 'github-actions', 'mathlib-dependent-issues', 'mathlib-merge-conflicts'] j-loreaux
assignee:j-loreaux
0-78440
21 hours ago
53-26504
53 days ago
9-41060
9 days
36868 ADedecker
author:ADedecker
 feat: Fréchet derivative of distributions, as a CLM --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) WIP merge-conflict 409/30 Mathlib.lean,Mathlib/Analysis/Distribution/Distribution.lean,Mathlib/Analysis/Normed/Module/FiniteDimension.lean,Mathlib/Topology/Algebra/Module/Spaces/FiniteDimensionCLM.lean 4 4 ['github-actions', 'mathlib-merge-conflicts'] nobody
0-78437
21 hours ago
unknown
0-0
0 seconds
39520 BryceT233
author:BryceT233
 feat(RingTheory/Extension): `cotangentEquivH1Cotangent` Given `Algebra R S` and an extension `P : Extension R S`, this PR adds a linear equivalence between the cotangent space of `P` and the first homology of the naive cotangent complex of `S` over `P.Ring` . We show that the connecting homomorphism of the Jacobi-Zariski sequence of `R → P.Ring → S` coincides with `P.cotangentComplex` via this equivalence: 屏幕截图_22-5-2026_82258_www overleaf com --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-ring-theory 64/0 Mathlib/RingTheory/Kaehler/JacobiZariski.lean 1 2 ['github-actions', 'robin-carlier'] chrisflav
assignee:chrisflav
0-77851
21 hours ago
4-81812
4 days ago
4-81523
4 days
39678 tb65536
author:tb65536
 feat(RingTheory/RamificationInertia/Ramification): ramification index is invariant under a group action This PR proves that ramification index is invariant under a group action. We already have this for the old definition `ramificationIdx`, but we will need this new version for `ramificationIdx'` for the upcoming refactor. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-ring-theory t-algebra
label:t-algebra$
 22/0 Mathlib/RingTheory/RamificationInertia/Ramification.lean 1 1 ['github-actions'] nobody
0-77109
21 hours ago
0-77109
21 hours ago
0-76821
21 hours
34273 gasparattila
author:gasparattila
 feat(Topology/Sets): finite sets are dense in `(Nonempty)Compacts` --- - [x] depends on: #34266 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-topology 35/0 Mathlib/Topology/Sets/VietorisTopology.lean 1 4 ['github-actions', 'mathlib-dependent-issues', 'mathlib4-merge-conflict-bot', 'scholzhannah'] nobody
0-75789
21 hours ago
59-18764
59 days ago
59-19725
59 days
38431 joelriou
author:joelriou
 refactor(Topology): redefine Delta-generated spaces Delta-generated spaces are made particular cases of `X`-generated spaces, where `X` is a family of topological spaces. --- - [x] depends on: #38080 - [x] depends on: #37799 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-topology large-import 139/208 Mathlib/Topology/Category/DeltaGenerated.lean,Mathlib/Topology/Compactness/DeltaGeneratedSpace.lean,Mathlib/Topology/Convenient/Category.lean,Mathlib/Topology/Convenient/GeneratedBy.lean 4 3 ['github-actions', 'mathlib-dependent-issues', 'mathlib-merge-conflicts'] nobody
0-75788
21 hours ago
16-17398
16 days ago
16-17187
16 days
39033 tb65536
author:tb65536
 feat(Analysis/DirichletEigenvalue): Dirichlet eigenvalues of a set This PR defines the Dirichlet eigenvalues of a set (in the sense of "can you hear the shape of a drum"). --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-analysis 58/0 Mathlib.lean,Mathlib/Analysis/DirichletEigenvalue.lean 2 1 ['github-actions'] nobody
0-75787
21 hours ago
15-31712
15 days ago
15-31425
15 days
37682 SabrinaJewson
author:SabrinaJewson
 refactor(Order/OrdContinuous): redefine left and right order continuity to not require preserving ⊥/⊤ `LeftOrdContinuous` currently requires that `f ⊥ = ⊥`, but this means that many functions that are perhaps intuitively left-continuous (like `f x = x + 1` on `ℝ≥0`) are not. In particular, this change means that functions between conditionally complete lattices are `LeftOrdContinuous` iff they are monotone and topologically left continuous (see `MonotoneOn.map_csSup_of_continuousWithinAt` for the reverse direction). If one wants the concept that existed before, one can either accept the `f ⊥ = ⊥` hypothesis separately or, if the function is between complete lattices, use the left side of a `GaloisConnection` (which is equivalent, although I think this is not yet in Mathlib). This removes the definitional equality of the type in favour of a structure. Since most of the time users will be working with the `sSup` versions and not with `IsLUB`, I think this is justified. As a consequence, this removes the definitional equality between `LeftOrdContinuous` and `RightOrdContinuous` of the dual – the latter could be redefined to re-add this, but we do have conversion functions. `LeftOrdContinuous.continuousWithinAt_Iic` is rewritten to accomodate these changes; the superfluous `DenselyOrdered` assumption is also removed. [Zulip thread](https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/LeftOrdContinuous.20requires.20f.28.E2.8A.A5.29.20.3D.20.E2.8A.A5/near/582932491) --- - [x] depends on: #37735 - [x] depends on: #37772 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor t-order 52/38 Mathlib/Order/OrdContinuous.lean,Mathlib/Order/SemiconjSup.lean,Mathlib/Topology/Order/Basic.lean 3 10 ['SabrinaJewson', 'astrainfinita', 'github-actions', 'mathlib-dependent-issues', 'mathlib-merge-conflicts', 'vihdzp'] nobody
0-75786
21 hours ago
42-83813
42 days ago
44-80633
44 days
36667 NoneMore
author:NoneMore
 feat(ModelTheory): add `exClosure` definition for first-order formulas Prepare for moving realizations between elementarily equivalent structures. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor t-logic 37/0 Mathlib/ModelTheory/Semantics.lean,Mathlib/ModelTheory/Syntax.lean 2 2 ['github-actions'] nobody
0-75785
21 hours ago
68-60006
68 days ago
68-59717
68 days
37997 emlis42
author:emlis42
 feat(Algebra/ContinuedFractions): generalize determinant formula to GenContFract Let $g$ be a `GenContFract K`. In this PR I generalize the determinant formula for continued fractions from the simple continued fraction case $$A_n B_{n+1} - B_n A_{n+1} = (-1)^n$$ to the generalized continued fraction product formula $$A_n B_{n+1} - B_n A_{n+1} = (-a_0) (-a_1) \dots (-a_n)$$ - The `SimpContFract` version is still available unchanged, so this should avoid breaking existing users of the old API. - The use of `0` as the default partial numerator in `(g.partNums.get? i).getD 0` allows product formulation that remains valid when the fraction is terminated. t-algebra new-contributor large-import
label:t-algebra$
 53/28 Mathlib/Algebra/ContinuedFractions/Computation/Approximations.lean,Mathlib/Algebra/ContinuedFractions/Determinant.lean 2 13 ['emlis42', 'github-actions', 'themathqueen', 'vihdzp'] nobody
0-75784
21 hours ago
25-22935
25 days ago
39-34863
39 days
33313 SnirBroshi
author:SnirBroshi
 feat(Combinatorics/SimpleGraph/Coloring/Edge): create a basic edge-coloring API Module name decided on [Zulip](https://leanprover.zulipchat.com/#narrow/channel/252551-graph-theory/topic/Coloring.20module.20names/with/583281500). --- Future work (which I'm working on): - Relating degrees to edge-colorability (`G.maxDegree ≤ G.chromaticIndex`, `G.EdgeColorable 1 ↔ G.maxDegree ≤ 1`, `G.chromaticIndex = 1 ↔ G.maxDegree = 1`, `G.EdgeColorable 2 ↔ G.maxDegree ≤ 2`, `G.chromaticIndex = 2 ↔ G.maxDegree = 2`) - [Vizing's theorem](https://en.wikipedia.org/wiki/Vizing%27s_theorem) (`G.chromaticIndex ≤ G.maxDegree + 1`) - `chromaticIndex ⊤ = (if Even #V then #V - 1 else #V)` - `[Infinite α] → chromaticIndex ⊤ = ⊤` - [x] depends on: #33292 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-combinatorics 300/0 Mathlib.lean,Mathlib/Combinatorics/SimpleGraph/Coloring/Edge.lean 2 28 ['SnirBroshi', 'YaelDillies', 'github-actions', 'mathlib-dependent-issues', 'mathlib-merge-conflicts', 'ooovi'] nobody
0-75783
21 hours ago
22-18312
22 days ago
59-59357
59 days
27493 themathqueen
author:themathqueen
 feat(RingTheory/Coalgebra): define Frobenius algebra A Frobenius algebra `A` has the structure of both an algebra and a coalgebra such that: `(mul ⊗ id) ∘ assoc.symm ∘ (id ⊗ comul) = comul ∘ mul = (id ⊗ mul) ∘ assoc ∘ (comul ⊗ id)`. In diagrams this law looks like: ![](https://ncatlab.org/nlab/files/frobenius_laws.jpg) It suffices to show that `(mul ⊗ id) ∘ assoc.symm ∘ (id ⊗ comul) = (id ⊗ mul) ∘ assoc ∘ (comul ⊗ id)`. --- - [x] depends on: #27567 - [x] depends on: #27569 - [x] depends on: #32245 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-ring-theory 112/0 Mathlib.lean,Mathlib/RingTheory/FrobeniusAlgebra.lean 2 25 ['YaelDillies', 'erdOne', 'github-actions', 'mathlib-dependent-issues', 'mathlib4-merge-conflict-bot', 'themathqueen'] mariainesdff
assignee:mariainesdff
0-74304
20 hours ago
23-1130
23 days ago
69-65631
69 days
29774 Raph-DG
author:Raph-DG
 feat(AlgebraicGeometry): Order of vanishing of elements of the function field of locally noetherian, integral schemes In this PR, we define the order of vanishing of elements of the function field of locally noetherian, integral schemes at points of codimension 1. This is essentially just a wrapper around the API for the order of vanishing for rings (i.e. Ring.ord and Ring.ordFrac), but I think it's good to have this too for usability. --- - [ ] depends on: #29550 - [ ] depends on: #26735 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebraic-geometry 101/0 Mathlib.lean,Mathlib/AlgebraicGeometry/FunctionField.lean,Mathlib/AlgebraicGeometry/OrderOfVanishing.lean 3 5 ['github-actions', 'mathlib-dependent-issues', 'mathlib-merge-conflicts', 'mathlib4-merge-conflict-bot'] dagurtomas
assignee:dagurtomas
0-74302
20 hours ago
24-55297
24 days ago
24-56205
24 days
33355 0xTerencePrime
author:0xTerencePrime
 feat(Combinatorics/SimpleGraph/Connectivity): define vertex connectivity This PR introduces the foundations of vertex connectivity for simple graphs, providing a counterpart to the edge connectivity theory in #32870. ### Main definitions - `SimpleGraph.IsVertexReachable`: vertices remain reachable after removing strictly fewer than `k` other vertices. - `SimpleGraph.IsVertexConnected`: a graph is `k`-vertex-connected if its order is strictly greater than `k` and any two distinct vertices are `k`-vertex-reachable. Includes basic characterizations for $k=0$ and $k=1$, along with monotonicity lemmas (`anti` and `mono`). new-contributor t-combinatorics 216/0 Mathlib.lean,Mathlib/Combinatorics/SimpleGraph/Connectivity/VertexConnectivity.lean,Mathlib/Combinatorics/SimpleGraph/IsolateVerts.lean 3 149 ['0xTerencePrime', 'SnirBroshi', 'SproutSeeds', 'YaelDillies', 'github-actions', 'mathlib-merge-conflicts', 'vihdzp'] b-mehta
assignee:b-mehta
0-74301
20 hours ago
19-37417
19 days ago
55-6530
55 days
34908 CoolRmal
author:CoolRmal
 feat(GroupTheory): a characteristic subgroup of a characteristic subgroup is characteristic The main theorem proved in this PR is `characteristic_of_characteristic_of_characteristic`. If says that if `K` is a characteristic subgroup of a characteristic subgroup `H` of `G`, then `K` is a characteristic subgroup of `G`. Created with the help of Codex. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra t-group-theory
label:t-algebra$
 49/0 Mathlib/Algebra/Group/Subgroup/Basic.lean,Mathlib/Algebra/Group/Subgroup/Map.lean 2 16 ['CoolRmal', 'github-actions', 'robin-carlier'] mattrobball
assignee:mattrobball
0-74300
20 hours ago
3-15823
3 days ago
5-36723
5 days
37374 NoneMore
author:NoneMore
 feat(Topology/DerivedSet): add relative derived set lemmas Add `relDerivedSet`, `relDerivedSet_subset`, and `IsClosed.relDerivedSet_eq`. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-topology new-contributor 17/0 Mathlib/Topology/DerivedSet.lean 1 6 ['NoneMore', 'github-actions', 'plp127', 'vihdzp'] fpvandoorn
assignee:fpvandoorn
0-74298
20 hours ago
52-23837
52 days ago
52-76962
52 days
38098 astrainfinita
author:astrainfinita
 chore: make `SMul.comp.smul` `implicit_reducible` --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra
label:t-algebra$
 2/1 Mathlib/Algebra/Group/Action/Defs.lean 1 3 ['astrainfinita', 'github-actions', 'leanprover-radar'] dagurtomas
assignee:dagurtomas
0-74297
20 hours ago
36-65541
36 days ago
36-65252
36 days
38141 Jun2M
author:Jun2M
 feat(Order/Partition): Partition induced by symmetric, transitive relation We introduce a constructor for Partition from a symmetric, transitive relation, with `copy` function baked into the definition. Co-authored-by: Peter Nelson --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-order 41/7 Mathlib/Order/Partition/Basic.lean 1 1 ['github-actions'] bryangingechen
assignee:bryangingechen
0-74296
20 hours ago
35-72681
35 days ago
35-72392
35 days
38596 JJYYY-JJY
author:JJYYY-JJY
 Add basic row-equivalence and echelon-form API for matrices This PR adds the first foundational slice of `Mathlib.LinearAlgebra.Matrix.Echelon`, a theorem-oriented API for elementary row operations, row-equivalence, and echelon-form predicates for matrices. The main additions are: * elementary row-scaling matrices and their `GL` versions; * `Matrix.RowEquivalent` for the left action of `GL m R` on rectangular matrices; * row-zero, pivot, echelon, and reduced-echelon predicates; * semantic representative predicates `Matrix.IsEchelonFormOf` and `Matrix.IsReducedEchelonFormOf`. This intentionally stops before row-space characterizations, existence and uniqueness of reduced echelon representatives, and the noncomputable canonical representative `Matrix.rref`; those are planned for later PRs. Co-authored-by: Joseph Qian Co-authored-by: Veer Shukla Co-authored-by: Dhruv Bhatia Co-authored-by: Zheng Wu <1036819072@qq.com> --- This update trims the original full row-reduction API in response to reviewer feedback that the PR was too large. It keeps only the foundation needed by later row-reduction and `rref` PRs. t-algebra new-contributor
label:t-algebra$
 312/6 Mathlib.lean,Mathlib/LinearAlgebra/Matrix/Echelon.lean,Mathlib/LinearAlgebra/Matrix/Transvection.lean 3 10 ['JJYYY-JJY', 'SnirBroshi', 'copilot-pull-request-reviewer', 'dagurtomas', 'github-actions', 'wwylele'] dagurtomas
assignee:dagurtomas
0-74295
20 hours ago
8-80734
8 days ago
16-55868
16 days
38895 emlis42
author:emlis42
 chore(Algebra/ContinuedFractions): golf This PR simplifies some proofs in `Algebra/ContinuedFractions` t-algebra new-contributor
label:t-algebra$
 39/63 Mathlib/Algebra/ContinuedFractions/Computation/ApproximationCorollaries.lean,Mathlib/Algebra/ContinuedFractions/Computation/Approximations.lean,Mathlib/Algebra/ContinuedFractions/Computation/CorrectnessTerminating.lean,Mathlib/Algebra/ContinuedFractions/Computation/TerminatesIffRat.lean,Mathlib/Algebra/ContinuedFractions/Computation/Translations.lean,Mathlib/Algebra/ContinuedFractions/ContinuantsRecurrence.lean,Mathlib/Algebra/ContinuedFractions/ConvergentsEquiv.lean 7 2 ['github-actions'] dagurtomas
assignee:dagurtomas
0-74294
20 hours ago
17-78805
17 days ago
18-66819
18 days
38965 joelriou
author:joelriou
 feat(AlgebraicTopology/SimplicialSet/Homology): extension of scalars If `X` is a simplicial set, `R₁ →+* R₂` is a morphism of commutative rings, and `M₁` is a `R₁`-module, then the chain complex of `R₂`-modules of `X` with coefficients in `R₂ ⊗[R₁] M₁` identifies to the extensions of scalars of the chain complex of `R₁`-modules of `X` with coefficients in `M₁`. In this file, we obtain a formulation of this result where the extension of scalars functor `ModuleCat R₁ ⥤ ModuleCat R₂` is replaced by an arbitrary functor `F : C ⥤ D` which commutes with coproducts. (As `SimplicialObject` is now an `abbrev` for a category of functors, `SimplicialObject.whiskering` is also made an abbrev here.) --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebraic-topology 137/35 Mathlib.lean,Mathlib/Algebra/Homology/HomologicalComplex.lean,Mathlib/AlgebraicTopology/AlternatingFaceMapComplex.lean,Mathlib/AlgebraicTopology/SimplicialObject/Basic.lean,Mathlib/AlgebraicTopology/SimplicialSet/Homology/Basic.lean,Mathlib/AlgebraicTopology/SimplicialSet/Homology/MapHomologicalComplex.lean,Mathlib/AlgebraicTopology/SingularHomology/Basic.lean,Mathlib/CategoryTheory/Limits/Preserves/SigmaConst.lean,Mathlib/CategoryTheory/Limits/Shapes/Products.lean 9 5 ['dagurtomas', 'github-actions', 'joelriou', 'mathlib-merge-conflicts'] robin-carlier
assignee:robin-carlier
0-74293
20 hours ago
2-19223
2 days ago
4-39473
4 days
38975 ldct
author:ldct
 feat(EReal): Add equations for EReal Add equational lemmas for the simplifier to simplify `[natural number literal] + ⊤` in `EReal`, and add a test file in `MathlibTest/EReal.lean`. Without these lemmas, `simp` fails to close many of the goals in `MathlibTest/EReal.lean`. I believe simp should close all of them. An alternative is to add something like this as a simp lemma, to allow `top_add_of_ne_bot` to make progress, but it's not clear to me that this is desirable as a simp lemma, since it's not equational ``` example {n : ℕ} [n.AtLeastTwo] : (ofNat(n) : EReal) ≠ ⊤ := by exact Ne.symm (not_eq_of_beq_eq_false rfl) ``` --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-data 32/0 Mathlib/Data/EReal/Operations.lean,MathlibTest/EReal.lean 2 2 ['github-actions', 'vihdzp'] TwoFX
assignee:TwoFX
0-74292
20 hours ago
16-82974
16 days ago
16-82685
16 days
39174 yuanyi-350
author:yuanyi-350
 refactor(MeasureTheory): golf `Mathlib/MeasureTheory/Integral/Asymptotics` - refactors `Mathlib/MeasureTheory/Integral/Asymptotics` by simplifying `IsBigO.set_integral_isBigO` Extracted from #38104 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) codex LLM-generated t-measure-probability 6/12 Mathlib/MeasureTheory/Integral/Asymptotics.lean 1 2 ['github-actions', 'yuanyi-350'] kex-y
assignee:kex-y
0-74291
20 hours ago
11-49670
11 days ago
11-49381
11 days
39175 yuanyi-350
author:yuanyi-350
 refactor(MeasureTheory): golf `Mathlib/MeasureTheory/Integral/CircleTransform` - refactors `Mathlib/MeasureTheory/Integral/CircleTransform` by shortening `circleTransformDeriv_periodic` Extracted from #38104 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) codex LLM-generated t-measure-probability 1/6 Mathlib/MeasureTheory/Integral/CircleTransform.lean 1 2 ['github-actions', 'yuanyi-350'] RemyDegenne
assignee:RemyDegenne
0-74290
20 hours ago
11-49667
11 days ago
11-49378
11 days
39206 FordUniver
author:FordUniver
 feat(Analysis/Calculus/AddTorsor/AffineMap): smoothness of AffineMap.lineMap Add `AffineMap.lineMap_contDiff_uncurry` (joint smoothness in all three arguments), `AffineMap.lineMap_contDiff` (smoothness in the parameter with fixed endpoints), and the composition family `ContDiff.lineMap`, `ContDiffOn.lineMap`, `ContDiffAt.lineMap`, `ContDiffWithinAt.lineMap`, mirroring the corresponding `Continuous` family in `Mathlib.Topology.Algebra.Affine`. The uncurried and `ContDiffWithinAt` forms are tagged `@[fun_prop]` so the rest are automatically derivable. Closes the TODO at `Mathlib.MeasureTheory.Integral.CurveIntegral.Poincare:333` where the proof now reduces to `fun_prop`. --- Came up while formalizing the descent lemma for Lipschitz-smooth functions, where `Path.segment a b` being smooth on the unit interval is needed to apply [FTC along the segment](https://github.com/FordUniver/mathlib4/pull/21); `AffineMap.lineMap_contDiff` is the lemma directly used there. Two things I was genuinely not quite sure about: 1. Should the **three convenience variants** `ContDiffAt.lineMap`, `ContDiffOn.lineMap`, and `ContDiff.lineMap` be included? They are not strictly necessary but they exist for users wanting to write `h₁.lineMap h₂ hg` in dot notation by hand, and they mirror the convention of the `Continuous.lineMap` family. 2. Is `Mathlib.Analysis.Calculus.AddTorsor.AffineMap` the **right home**, and is adding `public import Mathlib.Analysis.Calculus.AddTorsor.AffineMap` to `Poincare.lean` to close the TODO reasonable? The placement mirrors the `Continuous.lineMap` family in `Mathlib.Topology.Algebra.Affine`, but hiding a `@[fun_prop]` in a file at the bottom of the hierarchy and needing to import it feels a bit off. t-measure-probability 56/4 Mathlib/Analysis/Calculus/AddTorsor/AffineMap.lean,Mathlib/MeasureTheory/Integral/CurveIntegral/Poincare.lean 2 1 ['github-actions'] EtienneC30
assignee:EtienneC30
0-74289
20 hours ago
11-23001
11 days ago
11-22712
11 days
39058 vihdzp
author:vihdzp
 chore: `IsBotZeroClass (Fin n)` We also deprecate a bunch of theorems that now follow from the typeclass. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) large-import t-order maintainer-merge 34/32 Archive/Imo/Imo2024Q5.lean,Mathlib/AlgebraicTopology/Quasicategory/Basic.lean,Mathlib/AlgebraicTopology/SimplexCategory/Basic.lean,Mathlib/AlgebraicTopology/SimplicialObject/Basic.lean,Mathlib/AlgebraicTopology/SimplicialSet/Basic.lean,Mathlib/Combinatorics/Additive/FreimanHom.lean,Mathlib/Data/Fin/SuccPred.lean,Mathlib/GroupTheory/Perm/Sign.lean,Mathlib/Logic/Equiv/Fin/Rotate.lean,Mathlib/Order/Fin/Basic.lean,Mathlib/Order/Grade.lean,Mathlib/Order/Interval/Set/Basic.lean,Mathlib/RingTheory/ChainOfDivisors.lean 13 20 ['Komyyy', 'github-actions', 'leanprover-radar', 'plp127', 'vihdzp'] nobody
0-71167
19 hours ago
3-35679
3 days ago
14-76988
14 days
39679 BryceT233
author:BryceT233
 feat(RingTheory/Extension): `fromH1Cotangent` This PR is a continuation of #39520. For an extension `P : Extension R S`, we introduce `fromH1Cotangent`, a linear map from `H1Cotangent R S` to `P.H1Cotangent` induced by the default extension homomorphism. We show that the following diagram commutes: 屏幕截图_22-5-2026_82335_www overleaf com Finally, by combining this commutativity lemma with the exactness of Jacobi-Zariski sequence, we prove that `fromH1Cotangent` is surjective. --- - [ ] depends on: #39520 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-ring-theory blocked-by-other-PR 104/0 Mathlib/RingTheory/Extension/Basic.lean,Mathlib/RingTheory/Kaehler/JacobiZariski.lean 2 2 ['github-actions', 'mathlib-dependent-issues'] nobody
0-71041
19 hours ago
0-71042
19 hours ago
0-3726
1 hour
39683 joneugster
author:joneugster
 chore: move test files and recapitalise file names (part 4) capitalise test files, move some to a folder. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) file-removed 0/0 MathlibTest/AesopCat.lean,MathlibTest/Algebra/Algebra/Rat.lean,MathlibTest/Algebra/Polynomial.lean,MathlibTest/Data/DFinsupp/DFinsuppMultiLinear.lean,MathlibTest/Data/DFinsupp/Notation.lean,MathlibTest/Data/Fin/VecNotation.lean,MathlibTest/Data/FunLike.lean,MathlibTest/Data/Real.lean,MathlibTest/Data/ZMod.lean,MathlibTest/DeriveCountable.lean,MathlibTest/DeriveCountableModule.lean,MathlibTest/DeriveEncodable.lean,MathlibTest/ENatToNat.lean,MathlibTest/EvalElab.lean,MathlibTest/FailIfNoProgress.lean,MathlibTest/FastInstance.lean,MathlibTest/FinsetBuilder.lean,MathlibTest/FinsetRepr.lean,MathlibTest/FinsuppNotation.lean,MathlibTest/FormatTable.lean,MathlibTest/ImportAll.lean,MathlibTest/InstanceDiamonds.lean,MathlibTest/InstanceDiamonds/Analysis/Normed/Field/WithAbs.lean,MathlibTest/InstanceDiamonds/Data/Complex/Module.lean,MathlibTest/InstanceDiamonds/FieldTheory/IsAlgClosed/AlgebraicClosure.lean,MathlibTest/InstanceDiamonds/FieldTheory/SplittingField/Construction.lean,MathlibTest/InstanceDiamonds/Normed.lean,MathlibTest/JacobiSymbol.lean,MathlibTest/Lean/Tactic/Grind/AC.lean,MathlibTest/Lean/Tactic/Grind/CC.lean,MathlibTest/Lean/Tactic/Grind/Field.lean,MathlibTest/Lean/Tactic/Grind/FieldInstance.lean,MathlibTest/Lean/Tactic/Grind/Grobner.lean,MathlibTest/Lean/Tactic/Grind/Linarith.lean,MathlibTest/Lean/Tactic/Grind/Lint.lean,MathlibTest/Lean/Tactic/Grind/NatCastInstance.lean,MathlibTest/Lean/Tactic/Grind/OrderedRing.lean,MathlibTest/Lean/Tactic/Grind/PairwiseDisjoint.lean,MathlibTest/Lean/Tactic/Grind/Panic.lean,MathlibTest/Lean/Tactic/Grind/Ring.lean,MathlibTest/Lean/Tactic/Grind/Set.lean,MathlibTest/Lean/Tactic/Grind/Trig.lean,MathlibTest/Lean/Tactic/Rewrites.lean,MathlibTest/NormCast.lean,MathlibTest/RegisterTryTactic.lean,MathlibTest/RightActions.lean,MathlibTest/SetLike.lean,MathlibTest/SimpConfluence.lean,MathlibTest/SlimCheck.lean,MathlibTest/SlowInstances.lean,MathlibTest/SlowSimp.lean,MathlibTest/Tactic/Widget/CalcQuestionMark.lean,MathlibTest/Tactic/Widget/CommDiag.lean,MathlibTest/Tactic/Widget/Conv.lean,MathlibTest/TacticTimeout.lean,MathlibTest/Util/CompileInductive.lean,MathlibTest/Util/CountHeartbeats.lean,MathlibTest/Util/Notation3.lean,MathlibTest/instances/CommRingIntegralClosure.lean,MathlibTest/instances/RingFiniteness.lean 60 1 ['github-actions'] nobody
0-64855
18 hours ago
0-65148
18 hours ago
0-64859
18 hours
39682 joneugster
author:joneugster
 chore: move test files and recapitalise file names (part 3) Moves most test files about tactics to a folder Tactic and capitalises their names. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) file-removed 1/1 MathlibTest/Tactic/ApplyCongr.lean,MathlibTest/Tactic/ApplyFun.lean,MathlibTest/Tactic/ApplyRules.lean,MathlibTest/Tactic/ApplyWith.lean,MathlibTest/Tactic/Bound/Attribute.lean,MathlibTest/Tactic/Bound/Bound.lean,MathlibTest/Tactic/CancelDenoms.lean,MathlibTest/Tactic/Cases.lean,MathlibTest/Tactic/CasesM.lean,MathlibTest/Tactic/Change.lean,MathlibTest/Tactic/Check.lean,MathlibTest/Tactic/Choose/Choose.lean,MathlibTest/Tactic/Choose/Reduction.lean,MathlibTest/Tactic/Clean.lean,MathlibTest/Tactic/ClearExcept.lean,MathlibTest/Tactic/ClearExclamation.lean,MathlibTest/Tactic/Clear_.lean,MathlibTest/Tactic/CongrM.lean,MathlibTest/Tactic/Constructor.lean,MathlibTest/Tactic/Contrapose.lean,MathlibTest/Tactic/Conv.lean,MathlibTest/Tactic/Convert/Convert.lean,MathlibTest/Tactic/Convert/Convert2.lean,MathlibTest/Tactic/ErwQuestion.lean,MathlibTest/Tactic/ExistsI.lean,MathlibTest/Tactic/ExtractGoal.lean,MathlibTest/Tactic/FieldSimp.lean,MathlibTest/Tactic/FinCases.lean,MathlibTest/Tactic/Finiteness.lean,MathlibTest/Tactic/GCongr/Core.lean,MathlibTest/Tactic/GCongr/GCongr.lean,MathlibTest/Tactic/GCongr/Implications.lean,MathlibTest/Tactic/GCongr/Inequalities.lean,MathlibTest/Tactic/GCongr/Mod.lean,MathlibTest/Tactic/Group.lean,MathlibTest/Tactic/GuardGoalNums.lean,MathlibTest/Tactic/GuardHypNums.lean,MathlibTest/Tactic/Have.lean,MathlibTest/Tactic/Hint/Hint.lean,MathlibTest/Tactic/Hint/HintAll.lean,MathlibTest/Tactic/Inhabit.lean,MathlibTest/Tactic/IntervalCases.lean,MathlibTest/Tactic/Linarith/Basic.lean,MathlibTest/Tactic/Linarith/NNReal.lean,MathlibTest/Tactic/LinearCombination/LinearCombination.lean,MathlibTest/Tactic/LinearCombination/LinearCombinationPrime.lean,MathlibTest/Tactic/ModCases.lean,MathlibTest/Tactic/Monotonicity.lean,MathlibTest/Tactic/MoveAdd.lean,MathlibTest/Tactic/NoncommRing.lean,MathlibTest/Tactic/NormNum/NormNum.lean,MathlibTest/Tactic/NormNum/NormNumAbs.lean,MathlibTest/Tactic/NormNum/NormNumExt.lean,MathlibTest/Tactic/NormNum/NormNumFLT.lean,MathlibTest/Tactic/NormNum/NormNumOrdinal.lean,MathlibTest/Tactic/NormNum/NormNumRPow.lean,MathlibTest/Tactic/Observe.lean,MathlibTest/Tactic/Order.lean,MathlibTest/Tactic/PNatToNat.lean,MathlibTest/Tactic/ProdAssoc.lean,MathlibTest/Tactic/Push/Push.lean,MathlibTest/Tactic/Push/PushNeg.lean,MathlibTest/Tactic/Recall/Module.lean,MathlibTest/Tactic/Recover.lean,MathlibTest/Tactic/ReduceModChar.lean,MathlibTest/Tactic/Ring/Compare.lean,MathlibTest/Tactic/Ring/Ring.lean,MathlibTest/Tactic/Says/Says.lean,MathlibTest/Tactic/Says/Whitespace.lean,MathlibTest/Tactic/SimpIntro.lean,MathlibTest/Tactic/SolveByElim/Basic.lean,MathlibTest/Tactic/SolveByElim/DummyLabelAttr.lean,MathlibTest/Tactic/SolveByElim/Instances.lean,MathlibTest/Tactic/Spread.lean,MathlibTest/Tactic/SuccessIfFailWithMsg.lean,MathlibTest/Tactic/SwapVar.lean,MathlibTest/Tactic/ToAdditive/ToAdditive.lean,MathlibTest/Tactic/ToAdditive/ToAdditiveIrredDef.lean,MathlibTest/Tactic/ToDual.lean,MathlibTest/Tactic/UnsetOption.lean 80 1 ['github-actions'] nobody
0-64293
17 hours ago
0-66584
18 hours ago
0-66295
18 hours
32058 Thmoas-Guan
author:Thmoas-Guan
 feat(Algebra): Baer criterion for injective dimension In this PR, we added the cateory version of Baer criterion stating that `M` is injective iff `Ext^1(R/I, M)` vanish for all ideal `I`. By dimension shifting, we also have `M` has injective dimension not exceeding `n` iff `Ext^{n + 1}(R/I, M)` vanish for all ideal `I`. --- - [x] depends on: #36980 - [x] depends on: #39305 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra t-category-theory
label:t-algebra$
 124/0 Mathlib.lean,Mathlib/Algebra/Category/ModuleCat/Ext/Baer.lean 2 76 ['Thmoas-Guan', 'dagurtomas', 'github-actions', 'joelriou', 'mathlib-dependent-issues', 'mathlib-splicebot', 'mathlib4-merge-conflict-bot'] joelriou
assignee:joelriou
0-63589
17 hours ago
4-39619
4 days ago
59-42826
59 days
34435 huaizhangchu
author:huaizhangchu
 feat(Probability): convolution of Poisson distributions This PR proves that the convolution of two Poisson distributions is again a Poisson distribution: `Poisson(r₁) ∗ Poisson(r₂) = Poisson(r₁ + r₂)` ## Main results - `poissonMeasureReal_charFun`: characteristic function of Poisson distribution is `exp(r(exp(it) - 1))` - `poissonMeasureReal_conv_poissonMeasureReal`: convolution of Poisson distributions on ℝ - `poissonMeasure_conv_poissonMeasure`: convolution of Poisson distributions on ℕ - `poissonMeasure_add_poissonMeasure_of_indepFun`: sum of independent Poisson random variables ## Proof strategy Uses characteristic functions: `φ(t) = exp(r(eⁱᵗ - 1))`, then pulls back from ℝ to ℕ. --- - [x] depends on: #34521 - [ ] depends on: #36374 t-measure-probability large-import new-contributor 120/15 Mathlib/Analysis/InnerProductSpace/Basic.lean,Mathlib/Probability/Distributions/Poisson/Basic.lean 2 101 ['CoolRmal', 'DavidLedvinka', 'EtienneC30', 'github-actions', 'huaizhangchu', 'mathlib-dependent-issues', 'mathlib-merge-conflicts', 'pfaffelh', 'vianna04', 'wwylele', 'yuanyi-350'] EtienneC30
assignee:EtienneC30
0-62982
17 hours ago
0-62982
17 hours ago
73-56734
73 days
36643 Thmoas-Guan
author:Thmoas-Guan
 feat(Homology): interaction of projective and injective dimension and SES In this PR, we directly implemented the relation of `projectiveDimension` and `injectiveDimension` in SES. --- - [ ] depends on: #36817 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-category-theory 146/0 Mathlib/Algebra/Homology/ShortComplex/Exact.lean,Mathlib/CategoryTheory/Abelian/Injective/Dimension.lean,Mathlib/CategoryTheory/Abelian/Projective/Dimension.lean 3 5 ['dagurtomas', 'github-actions', 'mathlib-dependent-issues', 'mathlib-merge-conflicts'] adamtopaz
assignee:adamtopaz
0-59618
16 hours ago
0-59618
16 hours ago
38-58422
38 days
39673 drocta
author:drocta
 feat: add instances of MetricSpace, NormedAddGroup, and NormedAddCommGroup for DirectLimit add files `Topology/MetricSpace/DirectLimit.lean` (with an instance of `MetricSpace` for a `DirectLimit` of a directed system of `MetricSpace`s with `IsometryClass` map types between them) and `Analysis/Normed/Group/DirectLimit.lean` (with instances of `NormedAddGroup` and `NormedAddCommGroup` on `DirectLimit`) also lemmas `dist_def` and `norm_def` for these. --- This PR is part of a project of adding support for direct limits of $C^*$-algebras (as I described [on Zulip](https://leanprover.zulipchat.com/#narrow/channel/113489-new-members/topic/Early.20feedback.20on.20approach.20towards.20formalizing.20UHF.20algebras.3F) ). This PR uses `IsometryClass` to implement the requirement that the directed systems preserve the `Norm` on the `NormedAddGroup`s, following the advice I got [this Zulip thread](https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/Representing.20norm-preservation.20for.20directed.20systems.3F/with/595941824) . Use of AI: I again used ChatGPT a bit for some advice when writing this (for example, for ideas for simplifying parts of proofs that I suspected could be simpler/shorter, and for advice on which of a couple options would be more idiomatic). I can personally vouch for all of these contributions, and that I understand this code. t-topology new-contributor awaiting-author 258/0 Mathlib.lean,Mathlib/Analysis/Normed/Group/DirectLimit.lean,Mathlib/Analysis/Normed/Ring/DirectLimit.lean,Mathlib/Topology/MetricSpace/DirectLimit.lean 4 23 ['drocta', 'eric-wieser', 'github-actions', 'j-loreaux'] nobody
0-58617
16 hours ago
0-72087
19 hours ago
0-14741
4 hours
16074 Rida-Hamadani
author:Rida-Hamadani
 feat: combinatorial maps and planar graphs We define combinatorial maps, then we define planar graph using combinatorial maps. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-combinatorics 243/0 Mathlib.lean,Mathlib/Combinatorics/SimpleGraph/Planar.lean,Mathlib/Data/CombinatorialMap.lean 3 31 ['JMR-Independent', 'MrBrain295', 'Parcly-Taxel', 'Rida-Hamadani', 'github-actions', 'lambda-fairy', 'leanprover-community-bot-assistant'] kmill
assignee:kmill
0-55923
15 hours ago
321-65201
321 days ago
72-50365
72 days
39437 ooovi
author:ooovi
 feat(Geometry/Convex/ConvexSpace): show that an `AffineMap` `IsAffineMap` Show that `Convexity.IsAffineMap` generalises `AffineMap`s between affine spaces. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-convex-geometry 34/3 Mathlib/Geometry/Convex/ConvexSpace/AffineSpace.lean,Mathlib/Geometry/Convex/ConvexSpace/Defs.lean 2 3 ['github-actions', 'mathlib-merge-conflicts', 'ooovi'] nobody
0-54053
15 hours ago
0-54126
14 hours ago
5-63328
5 days
38741 eric-wieser
author:eric-wieser
 feat: Nat.card lemmas for Sym and Sym2 These are just translations of the `Fintype` counterparts. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-data 109/7 Mathlib.lean,Mathlib/Data/Sym/Card.lean,Mathlib/Data/Sym/NatCard.lean,Mathlib/Data/Sym/Sym2.lean 4 23 ['SnirBroshi', 'YaelDillies', 'eric-wieser', 'github-actions'] YaelDillies
assignee:YaelDillies
0-52204
14 hours ago
14-78089
14 days ago
21-8558
21 days
39356 TentativeConvert
author:TentativeConvert
 pushforward of gradings along map between indexing sets Pushforward of grading along map between indexing sets The main result of #36501 is that the quotient of a graded algebra by a homogeneous relation inherits a grading. This draft complements #36501 with the result that the grading on a graded algebra can be changed by "pushing forward" along an additive map of additive monoids. For example, an ℕ-grading can be turned into a ℤ-grading by pushing forward along the inclusion ℕ → ℤ, or collapsed to an even/odd-grading by pushing forward along the projection ℤ → ZMod 2. This result is currently in [`RingTheory/GradedAlgebra/Map/DecompositionMap_SetLike.lean`](https://github.com/TentativeConvert/mathlib4/blob/f4e54e0ec25f44c5d373e355e9926481e3102ccd/Mathlib/RingTheory/GradedAlgebra/Map/DecompositionMap_SetLike.lean). The changes to [`Mathlib/LinearAlgebra/CliffordAlgebra/Grading.lean`](https://github.com/TentativeConvert/mathlib4/blob/f4e54e0ec25f44c5d373e355e9926481e3102ccd/Mathlib/LinearAlgebra/CliffordAlgebra/Grading.lean) illustrate how the two results can be combined to give a new construction of the grading on the Clifford algebra: First, the grading on the tensor algebra is collapsed to an even/odd grading. With respect to this grading, the Clifford relation is homogeneous. The Clifford algebra is the quotient of the tensor algebra by the Clifford relation, so we obtain an induced grading on the Clifford algebra. Notes: This draft includes all of #36501, as this is necessary to demonstrate the application to Clifford algebras. Most of the changes shown below are from that PR. (I don't know how to include that PR and highlight only the changes made on top of it here.) --- - [ ] depends on: #36501 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebraic-geometry new-contributor blocked-by-other-PR merge-conflict 1303/46 Mathlib.lean,Mathlib/Algebra/BigOperators/Group/Finset/Basic.lean,Mathlib/Algebra/DirectSum/Decomposition.lean,Mathlib/AlgebraicGeometry/ProjectiveSpectrum/Basic.lean,Mathlib/AlgebraicGeometry/ProjectiveSpectrum/Scheme.lean,Mathlib/Data/DFinsupp/BigOperators.lean,Mathlib/LinearAlgebra/CliffordAlgebra/Conjugation.lean,Mathlib/LinearAlgebra/CliffordAlgebra/EvenEquiv.lean,Mathlib/LinearAlgebra/CliffordAlgebra/Grading.lean,Mathlib/LinearAlgebra/CliffordAlgebra/Prod.lean,Mathlib/LinearAlgebra/TensorAlgebra/Grading.lean,Mathlib/RingTheory/GradedAlgebra/Basic.lean,Mathlib/RingTheory/GradedAlgebra/Homogeneous/Ideal.lean,Mathlib/RingTheory/GradedAlgebra/Homogeneous/RingQuot.lean,Mathlib/RingTheory/GradedAlgebra/HomogeneousLocalization.lean,Mathlib/RingTheory/GradedAlgebra/Map/AddSubmonoidSSup.lean,Mathlib/RingTheory/GradedAlgebra/Map/DecompositionMap_SetLike.lean,Mathlib/RingTheory/GradedAlgebra/Map/Tests.lean,Mathlib/RingTheory/GradedAlgebra/Map/auxiliary.lean,Mathlib/RingTheory/GradedAlgebra/Map/locations.md,Mathlib/RingTheory/GradedAlgebra/Map/order-preserving-maps.md,Mathlib/RingTheory/Ideal/Span.lean 22 4 ['github-actions', 'mathlib-dependent-issues', 'mathlib-merge-conflicts'] nobody
0-49878
13 hours ago
unknown
0-0
0 seconds
39575 YaelDillies
author:YaelDillies
 chore(Data/Finsupp): make `mapDomain_congr` congr This makes simp stronger. It particular, it breaks some proofs that relied on simp being weak. From MeanFourier --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-convex-geometry 29/36 Mathlib/Algebra/MvPolynomial/Nilpotent.lean,Mathlib/Data/Finsupp/Basic.lean,Mathlib/Geometry/Convex/ConvexSpace/Defs.lean,Mathlib/LinearAlgebra/Basis/Defs.lean,Mathlib/LinearAlgebra/Finsupp/Pi.lean,Mathlib/LinearAlgebra/Matrix/Basis.lean,Mathlib/NumberTheory/NumberField/EquivReindex.lean,Mathlib/NumberTheory/NumberField/House.lean,Mathlib/RepresentationTheory/Homological/GroupHomology/Functoriality.lean,Mathlib/RepresentationTheory/Intertwining.lean 10 1 ['github-actions'] nobody
0-48670
13 hours ago
0-48747
13 hours ago
0-58110
16 hours
34472 ADedecker
author:ADedecker
 feat: characterize TVS asymptotics in terms of seminorms --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-analysis merge-conflict 472/24 Mathlib/Analysis/Asymptotics/TVS.lean,Mathlib/Analysis/Convex/EGauge.lean,Mathlib/Analysis/LocallyConvex/Asymptotics.lean,Mathlib/Analysis/LocallyConvex/WithSeminorms.lean,Mathlib/Analysis/Seminorm.lean 5 9 ['ADedecker', 'eric-wieser', 'github-actions', 'mathlib-merge-conflicts', 'mcdoll'] nobody
0-46627
12 hours ago
unknown
0-0
0 seconds
39680 grunweg
author:grunweg
 feat(CI): validate more aspects of PR titles Continuation of #34518; another subset of #16303. --- should have more tests! [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-linter 68/21 Mathlib/Tactic/Linter/ValidatePRTitle.lean,MathlibTest/ValidatePRTitle.lean 2 1 ['github-actions'] nobody
0-46448
12 hours ago
0-71228
19 hours ago
0-70939
19 hours
38275 TTony2019
author:TTony2019
 feat: Add `AffineEquiv.image_intrinsicInterior` ## Summary This PR generalizes the existing lemma `AffineIsometry.image_intrinsicInterior` to the setting of affine equivalences, yielding the corresponding result `AffineEquiv.image_intrinsicInterior`. Since affine equivalences are more general than affine isometries, the proof requires an additional finite-dimensionality assumption. The key extra input is that in finite-dimensional spaces, an affine equivalence induces a homeomorphism via `AffineEquiv.toHomeomorphOfFiniteDimensional`, so the assumptions are adjusted accordingly. Apart from these extra assumptions, the argument is essentially the same as for `AffineIsometry.image_intrinsicInterior`. ## Collaboration This PR was developed together with @imathwy. t-analysis new-contributor awaiting-author 283/41 Mathlib/Analysis/Convex/Intrinsic.lean,Mathlib/Analysis/Normed/Module/FiniteDimension.lean,Mathlib/LinearAlgebra/AffineSpace/Restrict.lean,Mathlib/Topology/Algebra/AffineSubspace.lean,Mathlib/Topology/Homeomorph/Defs.lean 5 28 ['TTony2019', 'github-actions', 'imathwy', 'j-loreaux', 'themathqueen'] j-loreaux
assignee:j-loreaux
0-46387
12 hours ago
3-18251
3 days ago
16-77083
16 days
38619 mariainesdff
author:mariainesdff
 feat(Algebra/SkewPolynomial/Basic): add API We add API for SkewPolynomial, including monomial, coeff, C and X. Co-authored by: @xgenereux. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra awaiting-author
label:t-algebra$
 319/26 Mathlib/Algebra/SkewMonoidAlgebra/Basic.lean,Mathlib/Algebra/SkewPolynomial/Basic.lean 2 59 ['faenuccio', 'github-actions', 'mariainesdff'] faenuccio
assignee:faenuccio
0-46081
12 hours ago
2-10930
2 days ago
17-46601
17 days
39655 joelriou
author:joelriou
 feat(CategoryTheory): the κ-accessible category of κ-directed posets Given a regular cardinal `κ : Cardinal.{u}`, we show that the category `CardinalFilteredPoset κ` of `κ`-directed partially ordered types (with order embeddings as morphisms) is a `κ`-accessible category. --- - [ ] depends on: #39669 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-category-theory WIP blocked-by-other-PR 486/3 Mathlib.lean,Mathlib/CategoryTheory/Presentable/CardinalDirectedPoset.lean,Mathlib/Order/Category/PartOrdEmb.lean 3 2 ['github-actions', 'mathlib-dependent-issues'] nobody
0-45867
12 hours ago
1-26579
1 day ago
0-12941
3 hours
34440 grunweg
author:grunweg
 feat: linter for name components in uppercase Per the naming convention, these are errors (unless they are an abbreviation). Mathlib has *many* violations at the moment: for this reason, we add this as an environment linter and automatically add all current exceptions. Once these have been fixed, converting to a syntax linter is desirable. Until then, track the number of such exceptions as technical debt. --- [Zulip discussion](https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/naming.20convention.20linter/with/570617527) Note to self: wait for CI, then do a final nolints update. and try to implement the follow-up soon [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-linter large-import awaiting-author please-adopt merge-conflict 1024/8 Mathlib/Tactic/Linter/Style.lean,MathlibTest/DoubleUnderscore.lean,MathlibTest/Lint.lean,MathlibTest/LintStyle.lean,scripts/nolints.json 5 29 ['Vierkantor', 'github-actions', 'grunweg', 'joneugster', 'mathlib-merge-conflicts'] nobody
0-45291
12 hours ago
93-47172
93 days ago
13-82065
13 days
34466 Komyyy
author:Komyyy
 chore: modulize tests (N/N) --- Privately imports are intentional. I manually modulize each test so that the purpose of the tests is not lost by modulizing. - [x] Await the release of leanprover/lean4#12198 - [x] depends on: #34970 - [x] depends on: #35288 - [x] depends on: #36882 - [x] depends on: #36981 - [x] depends on: #37654 - [ ] Await the release of leanprover/lean4#13329 - [x] depends on: #37820 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) CI merge-conflict 310/63 MathlibTest/AssertImported.lean,MathlibTest/BinaryRec.lean,MathlibTest/Bound/attribute.lean,MathlibTest/Bound/bound.lean,MathlibTest/CategoryTheory/Bicategory/Normalize.lean,MathlibTest/CategoryTheory/Elementwise.lean,MathlibTest/CategoryTheory/Monoidal/Normalize.lean,MathlibTest/Clean.lean,MathlibTest/DFinsuppMultiLinear.lean,MathlibTest/GRewrite.lean,MathlibTest/LibrarySuggestions/sineQuaNon.lean,MathlibTest/LongFile.lean,MathlibTest/Nat/log.lean,MathlibTest/Perm.lean,MathlibTest/Polynomial.lean,MathlibTest/Quaternion.lean,MathlibTest/RefinedDiscrTree.lean,MathlibTest/antidiagonal.lean,MathlibTest/dfinsupp_notation.lean,MathlibTest/fast_instance.lean,MathlibTest/grind/ac.lean,MathlibTest/grind/cc.lean,MathlibTest/grind/field.lean,MathlibTest/grind/field_instance.lean,MathlibTest/grind/grobner.lean,MathlibTest/grind/linarith.lean,MathlibTest/grind/lint.lean,MathlibTest/grind/natCast_instance.lean,MathlibTest/grind/ordered_ring.lean,MathlibTest/grind/pairwise_disjoint.lean,MathlibTest/grind/panic.lean,MathlibTest/grind/ring.lean,MathlibTest/grind/set.lean,MathlibTest/grind/trig.lean,MathlibTest/hintAll.lean,MathlibTest/slow_simp.lean,MathlibTest/solve_by_elim/basic.lean,MathlibTest/solve_by_elim/dummy_label_attr.lean,MathlibTest/solve_by_elim/instances.lean,MathlibTest/vec_notation.lean,check_modulized_tests.lean,not_modulized_modules.txt 42 6 ['github-actions', 'mathlib-dependent-issues', 'mathlib-merge-conflicts'] nobody
0-45289
12 hours ago
unknown
0-0
0 seconds
38292 kim-em
author:kim-em
 feat(AlgebraicTopology): universal cover construction This PR constructs the universal cover of a path-connected, locally path-connected, semilocally simply connected space `X` as the based-path space modulo endpoint-preserving homotopy, topologised by coinduction from the compact-open based-path space. Split across three files: * `FundamentalGroupoid/BasedPath.lean` — the based-path space and the path-component machinery of `endpoint ⁻¹' U`. * `FundamentalGroupoid/UniversalCover/Basic.lean` — quotient topology, `proj`, and the sheet decomposition. * `FundamentalGroupoid/UniversalCover/Covering.lean` — `isCoveringMap`, `pathConnectedSpace`, `simplyConnectedSpace`, and the universal lifting property `existsUnique_continuousMap_lifts`. - [ ] depends on: #31576 I want to note this takes a different approach than Hatcher et al, which build the universal cover as the path space, but with a "custom" topology. It is then a theorem (often not proved in textbooks) that with the usual hypotheses this topology coincides with the one coinduced from the compact-open topology. I decided that "the mathlib way" was just to start with the "natural" topology, and not take this shortcut. 🤖 Prepared with Claude Code and Codex. 2996/33 Mathlib.lean,Mathlib/AlgebraicTopology/FundamentalGroupoid/BasedPath.lean,Mathlib/AlgebraicTopology/FundamentalGroupoid/Basic.lean,Mathlib/AlgebraicTopology/FundamentalGroupoid/FundamentalGroup.lean,Mathlib/AlgebraicTopology/FundamentalGroupoid/SemilocallySimplyConnected.lean,Mathlib/AlgebraicTopology/FundamentalGroupoid/UniversalCover/Basic.lean,Mathlib/AlgebraicTopology/FundamentalGroupoid/UniversalCover/Covering.lean,Mathlib/Topology/Connected/PathConnected.lean,Mathlib/Topology/Homotopy/Path.lean,Mathlib/Topology/Path.lean,Mathlib/Topology/UnitInterval.lean 11 50 ['github-actions', 'kim-em', 'mathlib-dependent-issues', 'mathlib-merge-conflicts'] nobody
0-45283
12 hours ago
unknown
0-0
0 seconds
38168 ADedecker
author:ADedecker
 feat: if `E` is finite dimensional, `E →L[𝕜] F` has the product topology --- - [x] depends on: #38164 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-topology t-analysis awaiting-author merge-conflict 235/29 Mathlib.lean,Mathlib/Analysis/Normed/Module/FiniteDimension.lean,Mathlib/Topology/Algebra/Module/Spaces/FiniteDimensionCLM.lean 3 8 ['ADedecker', 'faenuccio', 'github-actions', 'j-loreaux', 'mathlib-dependent-issues', 'mathlib-merge-conflicts'] j-loreaux
assignee:j-loreaux
0-45038
12 hours ago
24-27855
24 days ago
4-66970
4 days
38853 ldct
author:ldct
 chore: tag set lemmas with @[push] Tag set theory lemmas for pushing intersection, union and complement --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-order awaiting-author merge-conflict 31/4 Mathlib/Data/Set/Basic.lean,Mathlib/Order/BooleanAlgebra/Basic.lean,Mathlib/Order/BooleanAlgebra/Set.lean,MathlibTest/push.lean 4 2 ['YaelDillies', 'github-actions', 'mathlib-merge-conflicts'] nobody
0-45032
12 hours ago
19-44826
19 days ago
0-18718
5 hours
39101 ldct
author:ldct
 feat: Tag exp_nat_mul and exp_int_mul Tag these two lemmas to allow - pushing the `^` in `(exp ...)^...` - pushing the `exp` in `exp (... * ...)` and add unit tests. Also tag the real versions, and `exp 0` for `push exp` --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-analysis awaiting-author merge-conflict 28/2 Mathlib/Analysis/Complex/Exponential.lean,MathlibTest/push.lean 2 6 ['github-actions', 'j-loreaux', 'mathlib-merge-conflicts'] j-loreaux
assignee:j-loreaux
0-45028
12 hours ago
6-75609
6 days ago
6-85937
6 days
39111 hanwenzhu
author:hanwenzhu
 chore(Probability/Martingale): use `to_dual` for Submartingale/Supermartingale WIP, will probably split to a PR for EventuallyLE etc cc @CoolRmal --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) WIP merge-conflict 169/169 Mathlib/Algebra/Order/Monoid/Unbundled/Defs.lean,Mathlib/Analysis/Normed/Order/Lattice.lean,Mathlib/MeasureTheory/Function/ConditionalExpectation/Basic.lean,Mathlib/MeasureTheory/Function/ConditionalExpectation/CondexpL1.lean,Mathlib/MeasureTheory/Function/LpOrder.lean,Mathlib/MeasureTheory/Integral/Bochner/Basic.lean,Mathlib/MeasureTheory/Integral/Bochner/Set.lean,Mathlib/MeasureTheory/Integral/SetToL1.lean,Mathlib/Order/Filter/Basic.lean,Mathlib/Probability/Martingale/Basic.lean,Mathlib/Tactic/Translate/Core.lean,Mathlib/Tactic/Translate/ToDual.lean 12 2 ['github-actions', 'mathlib-merge-conflicts'] nobody
0-45026
12 hours ago
unknown
0-0
0 seconds
39421 harahu
author:harahu
 chore: add empty lines after headers --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict 1250/0 Archive/Imo/Imo1998Q2.lean,Archive/Imo/Imo2001Q6.lean,Archive/Imo/Imo2005Q3.lean,Archive/Imo/Imo2008Q2.lean,Archive/Imo/Imo2008Q3.lean,Archive/Imo/Imo2008Q4.lean,Archive/Wiedijk100Theorems/FriendshipGraphs.lean,Archive/Wiedijk100Theorems/PerfectNumbers.lean,Counterexamples/DiscreteTopologyNonDiscreteUniformity.lean,Counterexamples/PeanoCurve.lean,Counterexamples/Pseudoelement.lean,Mathlib/Algebra/Algebra/Spectrum/Basic.lean,Mathlib/Algebra/Azumaya/Basic.lean,Mathlib/Algebra/BrauerGroup/Defs.lean,Mathlib/Algebra/Category/ContinuousCohomology/Basic.lean,Mathlib/Algebra/Category/FGModuleCat/Limits.lean,Mathlib/Algebra/Category/Grp/EpiMono.lean,Mathlib/Algebra/Category/ModuleCat/ChangeOfRings.lean,Mathlib/Algebra/Category/ModuleCat/Free.lean,Mathlib/Algebra/Category/ModuleCat/Presheaf/ColimitFunctor.lean,Mathlib/Algebra/Category/ModuleCat/Sheaf/Limits.lean,Mathlib/Algebra/Category/ModuleCat/Stalk.lean,Mathlib/Algebra/Category/ModuleCat/Topology/Basic.lean,Mathlib/Algebra/Category/Ring/Adjunctions.lean,Mathlib/Algebra/Category/Ring/Epi.lean,Mathlib/Algebra/Category/Ring/Topology.lean,Mathlib/Algebra/Central/Defs.lean,Mathlib/Algebra/Central/TensorProduct.lean,Mathlib/Algebra/CharP/CharAndCard.lean,Mathlib/Algebra/CharP/Defs.lean,Mathlib/Algebra/ContinuedFractions/Computation/TerminatesIffRat.lean,Mathlib/Algebra/EuclideanDomain/Field.lean,Mathlib/Algebra/EuclideanDomain/Int.lean,Mathlib/Algebra/Field/Subfield/Basic.lean,Mathlib/Algebra/Field/Subfield/Defs.lean,Mathlib/Algebra/FreeMonoid/FreeSemigroup.lean,Mathlib/Algebra/GCDMonoid/Nat.lean,Mathlib/Algebra/Group/Equiv/Defs.lean,Mathlib/Algebra/Group/Ext.lean,Mathlib/Algebra/Group/Indicator.lean,Mathlib/Algebra/Group/Subgroup/Actions.lean,Mathlib/Algebra/Group/Subgroup/Basic.lean,Mathlib/Algebra/Group/Subgroup/Defs.lean,Mathlib/Algebra/Group/Subgroup/Finite.lean,Mathlib/Algebra/Group/Subgroup/Ker.lean,Mathlib/Algebra/Group/Subgroup/Lattice.lean,Mathlib/Algebra/Group/Subgroup/Map.lean,Mathlib/Algebra/Group/Subgroup/MulOpposite.lean,Mathlib/Algebra/Group/Subgroup/MulOppositeLemmas.lean,Mathlib/Algebra/Group/Subgroup/ZPowers/Basic.lean,Mathlib/Algebra/Group/Subgroup/ZPowers/Lemmas.lean,Mathlib/Algebra/Group/Submonoid/Basic.lean,Mathlib/Algebra/Group/Submonoid/BigOperators.lean,Mathlib/Algebra/Group/Submonoid/Defs.lean,Mathlib/Algebra/Group/Submonoid/Membership.lean,Mathlib/Algebra/Group/Submonoid/Units.lean,Mathlib/Algebra/Group/Subsemigroup/Basic.lean,Mathlib/Algebra/Group/Subsemigroup/Defs.lean,Mathlib/Algebra/Group/Subsemigroup/Membership.lean,Mathlib/Algebra/GroupWithZero/Range.lean,Mathlib/Algebra/Homology/DerivedCategory/Basic.lean,Mathlib/Algebra/Homology/DerivedCategory/Ext/TStructure.lean,Mathlib/Algebra/Homology/DerivedCategory/SingleTriangle.lean,Mathlib/Algebra/Homology/Embedding/HomEquiv.lean,Mathlib/Algebra/Homology/Embedding/StupidTrunc.lean,Mathlib/Algebra/Homology/Embedding/TruncGE.lean,Mathlib/Algebra/Homology/Functor.lean,Mathlib/Algebra/Homology/HomotopyCategory/HomComplex.lean,Mathlib/Algebra/Homology/HomotopyCategory/HomComplexShift.lean,Mathlib/Algebra/Homology/HomotopyCategory/KInjective.lean,Mathlib/Algebra/Homology/HomotopyCategory/KProjective.lean,Mathlib/Algebra/Homology/HomotopyCategory/Pretriangulated.lean,Mathlib/Algebra/Homology/ModelCategory/Injective.lean,Mathlib/Algebra/Homology/Opposite.lean,Mathlib/Algebra/Homology/ShortComplex/Ab.lean,Mathlib/Algebra/Homology/SpectralObject/Basic.lean,Mathlib/Algebra/Homology/SpectralObject/Cycles.lean,Mathlib/Algebra/Homology/SpectralObject/Differentials.lean,Mathlib/Algebra/Homology/SpectralObject/EpiMono.lean,Mathlib/Algebra/Homology/SpectralObject/Page.lean,Mathlib/Algebra/Lie/Basic.lean,Mathlib/Algebra/Lie/Cochain.lean,Mathlib/Algebra/Lie/Extension.lean,Mathlib/Algebra/Lie/Loop.lean,Mathlib/Algebra/Lie/Prod.lean,Mathlib/Algebra/Lie/Semisimple/Lemmas.lean,Mathlib/Algebra/Lie/SerreConstruction.lean,Mathlib/Algebra/Lie/Sl2.lean,Mathlib/Algebra/Lie/Weights/IsSimple.lean,Mathlib/Algebra/Lie/Weights/Killing.lean,Mathlib/Algebra/Lie/Weights/Linear.lean,Mathlib/Algebra/Module/FinitePresentation.lean,Mathlib/Algebra/Module/LinearMap/Prod.lean,Mathlib/Algebra/Module/LocalizedModule/Submodule.lean,Mathlib/Algebra/Module/Presentation/Basic.lean,Mathlib/Algebra/Module/Presentation/RestrictScalars.lean,Mathlib/Algebra/Module/SnakeLemma.lean,Mathlib/Algebra/Module/SpanRank.lean,Mathlib/Algebra/Module/StablyFree/Basic.lean,Mathlib/Algebra/Module/Submodule/EqLocus.lean 876 3 ['github-actions', 'mathlib-merge-conflicts'] nobody
0-45022
12 hours ago
unknown
0-0
0 seconds
39428 harahu
author:harahu
 chore: add an empty line after module headers This makes the docs easier to read. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict 121/4 Archive/Imo/Imo1998Q2.lean,Archive/Imo/Imo2001Q6.lean,Archive/Imo/Imo2005Q3.lean,Archive/Imo/Imo2008Q2.lean,Archive/Imo/Imo2008Q3.lean,Archive/Imo/Imo2008Q4.lean,Counterexamples/DiscreteTopologyNonDiscreteUniformity.lean,Counterexamples/PeanoCurve.lean,Counterexamples/Pseudoelement.lean,Mathlib/Algebra/Algebra/Spectrum/Basic.lean,Mathlib/Algebra/Category/Grp/EpiMono.lean,Mathlib/Algebra/Category/ModuleCat/Stalk.lean,Mathlib/Algebra/EuclideanDomain/Field.lean,Mathlib/Algebra/EuclideanDomain/Int.lean,Mathlib/Algebra/Homology/Opposite.lean,Mathlib/Algebra/Lie/Cochain.lean,Mathlib/Algebra/Lie/Extension.lean,Mathlib/Algebra/Lie/Loop.lean,Mathlib/Algebra/MonoidAlgebra/PointwiseSMul.lean,Mathlib/Algebra/Order/AddTorsor.lean,Mathlib/Algebra/Order/Archimedean/IndicatorCard.lean,Mathlib/Algebra/Squarefree/Basic.lean,Mathlib/Algebra/Vertex/HVertexOperator.lean,Mathlib/Algebra/Vertex/VertexOperator.lean,Mathlib/AlgebraicTopology/FundamentalGroupoid/Product.lean,Mathlib/AlgebraicTopology/FundamentalGroupoid/SimplyConnected.lean,Mathlib/Analysis/Analytic/RadiusLiminf.lean,Mathlib/Analysis/Normed/Affine/Convex.lean,Mathlib/Analysis/Normed/Lp/PiLp.lean,Mathlib/Analysis/Normed/Lp/ProdLp.lean,Mathlib/Analysis/Normed/Unbundled/SeminormFromBounded.lean,Mathlib/Analysis/Normed/Unbundled/SmoothingSeminorm.lean,Mathlib/CategoryTheory/DinatTrans.lean,Mathlib/CategoryTheory/Limits/Preserves/Filtered.lean,Mathlib/CategoryTheory/Limits/Shapes/Pullback/HasPullback.lean,Mathlib/CategoryTheory/PathCategory/Basic.lean,Mathlib/CategoryTheory/Preadditive/Schur.lean,Mathlib/CategoryTheory/Sites/Abelian.lean,Mathlib/CategoryTheory/Sites/LeftExact.lean,Mathlib/CategoryTheory/Thin.lean,Mathlib/Combinatorics/Configuration.lean,Mathlib/Data/Bracket.lean,Mathlib/Data/Bundle.lean,Mathlib/Data/Finsupp/BigOperators.lean,Mathlib/Data/Nat/Squarefree.lean,Mathlib/Data/PSigma/Order.lean,Mathlib/Data/SProd.lean,Mathlib/Data/Set/Enumerate.lean,Mathlib/Data/Set/UnionLift.lean,Mathlib/Dynamics/TopologicalEntropy/CoverEntropy.lean,Mathlib/Dynamics/TopologicalEntropy/NetEntropy.lean,Mathlib/Dynamics/TopologicalEntropy/Semiconj.lean,Mathlib/FieldTheory/RatFunc/AsPolynomial.lean,Mathlib/Geometry/Manifold/Algebra/Monoid.lean,Mathlib/Geometry/Manifold/Diffeomorph.lean,Mathlib/Geometry/Manifold/IsManifold/InteriorBoundary.lean,Mathlib/GroupTheory/CommutingProbability.lean,Mathlib/LinearAlgebra/Multilinear/Curry.lean,Mathlib/LinearAlgebra/RootSystem/Finite/CanonicalBilinear.lean,Mathlib/LinearAlgebra/RootSystem/Hom.lean,Mathlib/LinearAlgebra/RootSystem/OfBilinear.lean,Mathlib/LinearAlgebra/RootSystem/RootPairingCat.lean,Mathlib/LinearAlgebra/RootSystem/WeylGroup.lean,Mathlib/Logic/Lemmas.lean,Mathlib/MeasureTheory/Function/EssSup.lean,Mathlib/MeasureTheory/Group/Prod.lean,Mathlib/ModelTheory/PartialEquiv.lean,Mathlib/NumberTheory/ClassNumber/AdmissibleAbs.lean,Mathlib/NumberTheory/ClassNumber/AdmissibleAbsoluteValue.lean,Mathlib/NumberTheory/ClassNumber/Finite.lean,Mathlib/NumberTheory/Cyclotomic/Discriminant.lean,Mathlib/NumberTheory/Cyclotomic/PrimitiveRoots.lean,Mathlib/NumberTheory/FLT/Four.lean,Mathlib/NumberTheory/FLT/Three.lean,Mathlib/NumberTheory/NumberField/Basic.lean,Mathlib/NumberTheory/NumberField/Completion/FinitePlace.lean,Mathlib/NumberTheory/NumberField/Cyclotomic/Basic.lean,Mathlib/NumberTheory/NumberField/Cyclotomic/Embeddings.lean,Mathlib/NumberTheory/NumberField/Cyclotomic/PID.lean,Mathlib/NumberTheory/NumberField/Cyclotomic/Three.lean,Mathlib/NumberTheory/NumberField/Discriminant/Basic.lean,Mathlib/NumberTheory/NumberField/Discriminant/Defs.lean,Mathlib/NumberTheory/NumberField/EquivReindex.lean,Mathlib/NumberTheory/NumberField/ExistsRamified.lean,Mathlib/NumberTheory/NumberField/House.lean,Mathlib/NumberTheory/NumberField/Norm.lean,Mathlib/NumberTheory/NumberField/Units/DirichletTheorem.lean,Mathlib/Order/Bounded.lean,Mathlib/Probability/Distributions/Uniform.lean,Mathlib/RepresentationTheory/Rep/Res.lean,Mathlib/RingTheory/AdicCompletion/RingHom.lean,Mathlib/RingTheory/Conductor.lean,Mathlib/RingTheory/Coprime/Lemmas.lean,Mathlib/RingTheory/DedekindDomain/AdicValuation.lean,Mathlib/RingTheory/DedekindDomain/FiniteAdeleRing.lean,Mathlib/RingTheory/DedekindDomain/Instances.lean,Mathlib/RingTheory/HahnSeries/Addition.lean,Mathlib/RingTheory/HahnSeries/Binomial.lean,Mathlib/RingTheory/HahnSeries/Multiplication.lean,Mathlib/RingTheory/HahnSeries/PowerSeries.lean 121 2 ['github-actions', 'mathlib-merge-conflicts'] nobody
0-45021
12 hours ago
0-45022
12 hours ago
6-54148
6 days
39537 robin-carlier
author:robin-carlier
 feat(CategoryTheory/Bicategory/Span): bicategories of spans In this PR, we extend the constructions from #39536 to a bicategory structure on `Spans C Wₗ Wᵣ`, which is a type alias for `C`, where the 1-morphisms are spans in `C` with left leg satisfying `Wₗ` and the right leg satisfies `Wᵣ`. From [SymmMonCoherence](https://github.com/robin-carlier/SymmMonCoherence) --- - [ ] depends on: #39536 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-category-theory blocked-by-other-PR merge-conflict 614/0 Mathlib.lean,Mathlib/CategoryTheory/Bicategory/Span/Basic.lean,Mathlib/CategoryTheory/MorphismProperty/Limits.lean 3 3 ['github-actions', 'mathlib-dependent-issues', 'mathlib-merge-conflicts'] nobody
0-45018
12 hours ago
4-17763
4 days ago
0-905
15 minutes
39593 BoltonBailey
author:BoltonBailey
 add linter for name capitalization This PR adds a `nameCheck.capitalization` linter to try and capture the guidelines in [this section](https://leanprover-community.github.io/contribute/naming.html#capitalization) of the conventions page. Some potentially relevant Zulip threads: - [#lean4 > automatic spelling generation & comparison](https://leanprover.zulipchat.com/#narrow/channel/270676-lean4/topic/automatic.20spelling.20generation.20.26.20comparison/with/505760384) - [#mathlib4 > naming convention linter](https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/naming.20convention.20linter/with/564571875) - [#mathlib4 > Naming convention](https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/Naming.20convention/with/535123036) These changes were made entirely with Claude Code and have not currently been audited. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-linter merge-conflict 352/1 Mathlib/Tactic/Linter/Style.lean,MathlibTest/NameCheckCapitalization.lean 2 3 ['github-actions', 'grunweg', 'mathlib-merge-conflicts'] nobody
0-45016
12 hours ago
unknown
0-0
0 seconds
39637 mcdoll
author:mcdoll
 feat(Topology/Algebra): use `Is*Apply` for `ContinuousLinearMap` This is the first in many PRs that use the new `Is*Apply` classes instead of structure specific `foo_apply` lemmas. The main bulk of the PR is in Mathlib/Topology/Algebra/Module/ContinuousLinearMap/Basic.lean, everything else is just fixing errors. For each `foo` in `zero`, `one`, `add`, `sub`, `neg`, smul` we do the following: - add an instance `IsFooApply` - rename `coe_foo` to `toLinearMap_foo` - depreprecate `coe_foo`, `coe_foo'`, and `foo_apply` We are rather conservative when it comes to the instances, in future PRs this will be used more. --- Note to maintainers: please don't put multiple PRs regarding `Is*Apply` on the queue, they will most likely create merge conflicts. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-topology merge-conflict 311/306 Archive/Sensitivity.lean,Mathlib/Algebra/Category/ModuleCat/Topology/Basic.lean,Mathlib/Algebra/Category/ModuleCat/Topology/Homology.lean,Mathlib/Analysis/Analytic/Binomial.lean,Mathlib/Analysis/Analytic/IteratedFDeriv.lean,Mathlib/Analysis/CStarAlgebra/CStarMatrix.lean,Mathlib/Analysis/CStarAlgebra/Multiplier.lean,Mathlib/Analysis/CStarAlgebra/Unitization.lean,Mathlib/Analysis/Calculus/ContDiff/FaaDiBruno.lean,Mathlib/Analysis/Calculus/ContDiff/Operations.lean,Mathlib/Analysis/Calculus/Darboux.lean,Mathlib/Analysis/Calculus/Deriv/Add.lean,Mathlib/Analysis/Calculus/Deriv/Basic.lean,Mathlib/Analysis/Calculus/Deriv/CompMul.lean,Mathlib/Analysis/Calculus/Deriv/Mul.lean,Mathlib/Analysis/Calculus/FDeriv/Add.lean,Mathlib/Analysis/Calculus/FDeriv/Analytic.lean,Mathlib/Analysis/Calculus/FDeriv/Norm.lean,Mathlib/Analysis/Calculus/FDeriv/Symmetric.lean,Mathlib/Analysis/Calculus/FormalMultilinearSeries.lean,Mathlib/Analysis/Calculus/Implicit.lean,Mathlib/Analysis/Calculus/UniformLimitsDeriv.lean,Mathlib/Analysis/Calculus/VectorField.lean,Mathlib/Analysis/Complex/CauchyIntegral.lean,Mathlib/Analysis/Complex/Harmonic/Analytic.lean,Mathlib/Analysis/Convex/Birkhoff.lean,Mathlib/Analysis/Convex/DoublyStochasticMatrix.lean,Mathlib/Analysis/Convex/Exposed.lean,Mathlib/Analysis/Convolution.lean,Mathlib/Analysis/Distribution/ContDiffMapSupportedIn.lean,Mathlib/Analysis/Fourier/FourierTransform.lean,Mathlib/Analysis/Fourier/FourierTransformDeriv.lean,Mathlib/Analysis/InnerProductSpace/Adjoint.lean,Mathlib/Analysis/InnerProductSpace/ConformalLinearMap.lean,Mathlib/Analysis/InnerProductSpace/Dual.lean,Mathlib/Analysis/InnerProductSpace/LinearMap.lean,Mathlib/Analysis/InnerProductSpace/PiL2.lean,Mathlib/Analysis/InnerProductSpace/Projection/Basic.lean,Mathlib/Analysis/InnerProductSpace/Projection/FiniteDimensional.lean,Mathlib/Analysis/InnerProductSpace/Rayleigh.lean,Mathlib/Analysis/InnerProductSpace/Reproducing.lean,Mathlib/Analysis/InnerProductSpace/StarOrder.lean,Mathlib/Analysis/InnerProductSpace/Symmetric.lean,Mathlib/Analysis/LocallyConvex/Separation.lean,Mathlib/Analysis/Normed/Group/SeparationQuotient.lean,Mathlib/Analysis/Normed/Module/Bases.lean,Mathlib/Analysis/Normed/Module/Multilinear/Basic.lean,Mathlib/Analysis/Normed/Module/PiTensorProduct/InjectiveSeminorm.lean,Mathlib/Analysis/Normed/Operator/Bilinear.lean,Mathlib/Analysis/Normed/Operator/Compact/Basic.lean,Mathlib/Analysis/Normed/Operator/ContinuousAlgEquiv.lean,Mathlib/Analysis/Normed/Operator/Mul.lean,Mathlib/Analysis/SpecialFunctions/Exponential.lean,Mathlib/Analysis/SpecialFunctions/Pow/Deriv.lean,Mathlib/Geometry/Euclidean/Volume/Measure.lean,Mathlib/Geometry/Manifold/IntegralCurve/Basic.lean,Mathlib/Geometry/Manifold/IntegralCurve/Transform.lean,Mathlib/Geometry/Manifold/VectorField/LieBracket.lean,Mathlib/LinearAlgebra/Eigenspace/ContinuousLinearMap.lean,Mathlib/MeasureTheory/Function/Jacobian.lean,Mathlib/MeasureTheory/Function/JacobianOneDim.lean,Mathlib/MeasureTheory/Group/Prod.lean,Mathlib/MeasureTheory/Integral/Bochner/L1.lean,Mathlib/MeasureTheory/Integral/FinMeasAdditive.lean,Mathlib/MeasureTheory/Integral/IntervalIntegral/Basic.lean,Mathlib/MeasureTheory/Integral/Lebesgue/Basic.lean,Mathlib/MeasureTheory/Measure/Haar/DistribChar.lean,Mathlib/MeasureTheory/Measure/Haar/MulEquivHaarChar.lean,Mathlib/MeasureTheory/Measure/Typeclasses/Finite.lean,Mathlib/MeasureTheory/VectorMeasure/Decomposition/Hahn.lean,Mathlib/MeasureTheory/VectorMeasure/Decomposition/Jordan.lean,Mathlib/NumberTheory/Modular.lean,Mathlib/NumberTheory/ModularForms/CongruenceSubgroups.lean,Mathlib/NumberTheory/ModularForms/JacobiTheta/TwoVariable.lean,Mathlib/NumberTheory/NumberField/CanonicalEmbedding/Basic.lean,Mathlib/NumberTheory/NumberField/CanonicalEmbedding/NormLeOne.lean,Mathlib/NumberTheory/Padics/PadicNumbers.lean,Mathlib/NumberTheory/SiegelsLemma.lean,Mathlib/Probability/Distributions/Gaussian/Basic.lean,Mathlib/Probability/Distributions/Gaussian/Fernique.lean,Mathlib/Probability/Distributions/Uniform.lean,Mathlib/Topology/Algebra/Module/ContinuousLinearMap/Basic.lean,Mathlib/Topology/Algebra/Module/FiniteDimensionBilinear.lean,Mathlib/Topology/ContinuousMap/StoneWeierstrass.lean,scripts/nolints_prime_decls.txt 85 6 ['github-actions', 'leanprover-radar', 'mathlib-merge-conflicts', 'mcdoll'] nobody
0-45014
12 hours ago
0-45015
12 hours ago
0-49000
13 hours
39676 joneugster
author:joneugster
 chore: move test files and recapitalise filennames Continuation of #39674. Renames all test files to use UpperCamelCase. Moves a few files to a folder according to the location of the tested file. --- While fixing capitalisation on all filenames, this PR makes no effort to sort all test files into according folders. This will be happening in follow-ups. - [ ] depends on: #39681 - [ ] depends on: #39682 - [ ] depends on: #39683 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) file-removed blocked-by-other-PR merge-conflict 22/22 MathlibTest/AesopCat.lean,MathlibTest/Algebra/Algebra/Rat.lean,MathlibTest/Algebra/Polynomial.lean,MathlibTest/Algebra/Quaternion.lean,MathlibTest/Data/DFinsupp/DFinsuppMultiLinear.lean,MathlibTest/Data/DFinsupp/Notation.lean,MathlibTest/Data/Fin/VecNotation.lean,MathlibTest/Data/FunLike.lean,MathlibTest/Data/Real.lean,MathlibTest/Data/ZMod.lean,MathlibTest/DeriveCountable.lean,MathlibTest/DeriveCountableModule.lean,MathlibTest/DeriveEncodable.lean,MathlibTest/ENatToNat.lean,MathlibTest/EvalElab.lean,MathlibTest/FailIfNoProgress.lean,MathlibTest/FastInstance.lean,MathlibTest/FinsetBuilder.lean,MathlibTest/FinsetRepr.lean,MathlibTest/FinsuppNotation.lean,MathlibTest/FormatTable.lean,MathlibTest/ImportAll.lean,MathlibTest/InstanceDiamonds.lean,MathlibTest/InstanceDiamonds/Analysis/Normed/Field/WithAbs.lean,MathlibTest/InstanceDiamonds/Data/Complex/Module.lean,MathlibTest/InstanceDiamonds/FieldTheory/IsAlgClosed/AlgebraicClosure.lean,MathlibTest/InstanceDiamonds/FieldTheory/SplittingField/Construction.lean,MathlibTest/InstanceDiamonds/Normed.lean,MathlibTest/JacobiSymbol.lean,MathlibTest/Lean/Tactic/Grind/AC.lean,MathlibTest/Lean/Tactic/Grind/CC.lean,MathlibTest/Lean/Tactic/Grind/Field.lean,MathlibTest/Lean/Tactic/Grind/FieldInstance.lean,MathlibTest/Lean/Tactic/Grind/Grobner.lean,MathlibTest/Lean/Tactic/Grind/Linarith.lean,MathlibTest/Lean/Tactic/Grind/Lint.lean,MathlibTest/Lean/Tactic/Grind/NatCastInstance.lean,MathlibTest/Lean/Tactic/Grind/OrderedRing.lean,MathlibTest/Lean/Tactic/Grind/PairwiseDisjoint.lean,MathlibTest/Lean/Tactic/Grind/Panic.lean,MathlibTest/Lean/Tactic/Grind/Ring.lean,MathlibTest/Lean/Tactic/Grind/Set.lean,MathlibTest/Lean/Tactic/Grind/Trig.lean,MathlibTest/Lean/Tactic/Rewrites.lean,MathlibTest/Linter/DeprecatedModule/DeprecatedModule.lean,MathlibTest/Linter/DeprecatedModule/DeprecatedModuleAllTest.lean,MathlibTest/Linter/DeprecatedModule/DeprecatedModuleMetaTest.lean,MathlibTest/Linter/DeprecatedModule/DeprecatedModuleNew.lean,MathlibTest/Linter/DeprecatedModule/DeprecatedModulePublicMetaTest.lean,MathlibTest/Linter/DeprecatedModule/DeprecatedModulePublicTest.lean,MathlibTest/Linter/DeprecatedModule/DeprecatedModuleTest.lean,MathlibTest/Linter/DeprecatedSyntaxLinter.lean,MathlibTest/Linter/DocPrime.lean,MathlibTest/Linter/DocString.lean,MathlibTest/Linter/EmptyLine.lean,MathlibTest/Linter/FlexibleLinter.lean,MathlibTest/Linter/ForbiddenModuleNames.lean,MathlibTest/Linter/HaveLetLinter.lean,MathlibTest/Linter/ImportHeavyFlexibleLinter.lean,MathlibTest/Linter/Lint.lean,MathlibTest/Linter/ModuleCasing.lean,MathlibTest/Linter/OldObtain.lean,MathlibTest/Linter/PrivateModuleLinter/HasOnlyPrivate.lean,MathlibTest/Linter/PrivateModuleLinter/HasPublic.lean,MathlibTest/Linter/PrivateModuleLinter/ImportOnly.lean,MathlibTest/Linter/PrivateModuleLinter/Initialize.lean,MathlibTest/Linter/PrivateModuleLinter/NonModule.lean,MathlibTest/Linter/PrivateModuleLinter/Notation3.lean,MathlibTest/Linter/PrivateModuleLinter/ReservedName1.lean,MathlibTest/Linter/PrivateModuleLinter/ReservedName2.lean,MathlibTest/Linter/Style/LintStyle.lean,MathlibTest/Linter/Style/LongFile.lean,MathlibTest/Linter/UnusedTactic/AesopUnusedTactic.lean,MathlibTest/Linter/UnusedTactic/UnusedTactic.lean,MathlibTest/Linter/ValidatePRTitle.lean,MathlibTest/Linter/VersoHeader.lean,MathlibTest/Linter/Whitespace.lean,MathlibTest/NormCast.lean,MathlibTest/RegisterTryTactic.lean,MathlibTest/RightActions.lean,MathlibTest/SetLike.lean,MathlibTest/SimpConfluence.lean,MathlibTest/SlimCheck.lean,MathlibTest/SlowInstances.lean,MathlibTest/SlowSimp.lean,MathlibTest/Tactic/ApplyCongr.lean,MathlibTest/Tactic/ApplyFun.lean,MathlibTest/Tactic/ApplyRules.lean,MathlibTest/Tactic/ApplyWith.lean,MathlibTest/Tactic/Bound/Attribute.lean,MathlibTest/Tactic/Bound/Bound.lean,MathlibTest/Tactic/ByContra.lean,MathlibTest/Tactic/CancelDenoms.lean,MathlibTest/Tactic/Cases.lean,MathlibTest/Tactic/CasesM.lean,MathlibTest/Tactic/Change.lean,MathlibTest/Tactic/Check.lean,MathlibTest/Tactic/Choose/Choose.lean,MathlibTest/Tactic/Choose/Reduction.lean,MathlibTest/Tactic/Clean.lean 192 4 ['github-actions', 'grunweg', 'mathlib-dependent-issues', 'mathlib-merge-conflicts'] nobody
0-45013
12 hours ago
0-65891
18 hours ago
0-13262
3 hours
39414 SnirBroshi
author:SnirBroshi
 chore(Data/Set/Card): make `s.ncard` the simpNF of `Fintype.card s` Untags `coe_fintypeCard : ↑(Fintype.card s) = s.encard` as `@[simp]`, and instead tags - `fintypeCard_eq_ncard : Fintype.card s = s.ncard` - `coe_ncard_eq_encard : ↑(s.ncard) = s.encard` Then untags `simp` lemmas which are no longer simpNF because of this change; simpNF versions of some of them will be introduced in future PRs. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-data 23/28 Mathlib/Combinatorics/SimpleGraph/Connectivity/EdgeConnectivity.lean,Mathlib/Combinatorics/SimpleGraph/Copy.lean,Mathlib/Combinatorics/SimpleGraph/Finite.lean,Mathlib/Combinatorics/SimpleGraph/IncMatrix.lean,Mathlib/Combinatorics/SimpleGraph/Matching.lean,Mathlib/Combinatorics/SimpleGraph/Subgraph.lean,Mathlib/Data/Fintype/Card.lean,Mathlib/Data/Set/Card.lean,Mathlib/Data/Set/Finite/Basic.lean,Mathlib/GroupTheory/ClassEquation.lean,Mathlib/LinearAlgebra/Matrix/GeneralLinearGroup/Card.lean,Mathlib/Order/Interval/Finset/Defs.lean 12 8 ['SnirBroshi', 'YaelDillies', 'b-mehta', 'github-actions'] Vierkantor
assignee:Vierkantor
0-44613
12 hours ago
7-32102
7 days ago
7-31813
7 days
38953 Raph-DG
author:Raph-DG
 feat(AlgebraicGeometry): The sheaf of modules associated to a Weil divisor In this PR, we construct the sheaf of modules associated to a Weil divisor. Funnily enough, the definition does not actually require that the cycle is a Weil divisor, so in fact we construct a sheaf of modules associated to an arbitrary algebraic cycle. This isn't a particularly interesting definition outside of the case where the cycle is a Weil divisor as far as I can tell, but still I thought that was interesting. - [ ] depends on: #38472 - [ ] depends on: #35868 --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) WIP large-import blocked-by-other-PR 1382/0 Mathlib.lean,Mathlib/AlgebraicGeometry/AlgebraicCycle/Basic.lean,Mathlib/AlgebraicGeometry/AlgebraicCycle/Principal.lean,Mathlib/AlgebraicGeometry/AlgebraicCycle/Sheaf.lean,Mathlib/AlgebraicGeometry/FunctionField.lean,Mathlib/AlgebraicGeometry/OrderOfVanishing.lean,Mathlib/Order/Hom/Basic.lean,Mathlib/Order/KrullDimension.lean,Mathlib/Order/Minimal.lean,Mathlib/Topology/Connected/Basic.lean,Mathlib/Topology/Inseparable.lean,Mathlib/Topology/LocallyFinsupp/Pushforward.lean,Mathlib/Topology/Sheaves/SheafCondition/UniqueGluing.lean,Mathlib/Topology/Sober.lean 14 3 ['github-actions', 'mathlib-dependent-issues', 'mathlib-merge-conflicts'] nobody
0-44192
12 hours ago
17-45938
17 days ago
0-12
12 seconds
39687 TentativeConvert
author:TentativeConvert
 feat(Algebra/Group/Submonoid): type class to indicate that supremum in a SubmonoidClass agrees with supremum of submonoids Add a type class `SubmonoidClass.IsConcreteSSup` to indicate that the canonical map `.ofClass` from a class `S` of submonoids of `M` to `Submonoid M` preserves suprema. --- This PR implements the minimal type class assumption needed to make „pushfoward of gradings along maps of indexing sets“ – see draft PR #39356 – work in some `SetLike` generality. Given `{S M : Type*} [SetLike S M] [Monoid M] [SubmonoidClass S M]`, we have canonical maps ``` S → Submonoid M → Set M ``` The first is `Submonoid.ofClass`, the second and the composition are `coe` maps coming from the `SetLike` structures. Depending on `S`, these maps may or may not satisfy various properties with respect the lattice structures on `Submonoid M` and `Set M`. Mathlib so far includes the type class `[IsConcreteLE S M]`, which asserts that the composition `S → Set M` is order-preserving and order-reflecting. The type class defined here asserts that the first map, `S → Submonoid M`, preserves suprema. In examples such as `S = Subgroup M`, `S = Submodule R M`, much more is true – in these cases, `S` is a complete sublattice of `Submonoid M`. But there are also examples where only the weaker property defined here holds, e.g. `S = OpenSubgroup M` for a topological group `M`. Note on `outParam`: I did *not* write `(M : outParam Type*)` in the assumptions of `SubmonoidClass.IsConcreteSSup` in accordance with the [DocString of `Setlike`](https://leanprover-community.github.io/mathlib4_docs/Mathlib/Data/SetLike/Basic.html#SetLike). However, we do have `(B : outParam Type*)` in the definition of `IsConcreteLE`, so perhaps I'm misinterpreting the DocString. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor t-algebra
label:t-algebra$
 56/0 Mathlib.lean,Mathlib/Algebra/Group/Submonoid/SSup.lean 2 2 ['github-actions'] nobody
0-44179
12 hours ago
0-44248
12 hours ago
0-44559
12 hours
39669 joelriou
author:joelriou
 feat(CategoryTheory): the category of κ-directed posets Given a regular cardinal `κ : Cardinal.{u}`, we define the category `CardinalFilteredPoset κ` of `κ`-directed partially ordered types (with order embeddings as morphisms). In a future PR #39655, we shall show that it is a `κ`-accessible category. In this PR, we also show that if `J : CardinalFilteredPoset κ`, the object `J.withTop` obtained by adding a top element is a `κ'`-filtered colimit of objects of cardinality `< κ'` (when `κ'` is a regular cardinal such that `κ ≤ κ'`). This shall be used in #39655 in order to characterize `κ'`-presentable objects in `CardinalFilteredPoset κ` as the objects that are of cardinality `< κ'`. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-category-theory 314/3 Mathlib.lean,Mathlib/CategoryTheory/Presentable/CardinalDirectedPoset.lean,Mathlib/Order/Category/PartOrdEmb.lean 3 11 ['dagurtomas', 'github-actions', 'joelriou'] nobody
0-43940
12 hours ago
0-44013
12 hours ago
1-3823
1 day
38964 smmercuri
author:smmercuri
 chore(Algebra): consolidate variables and sections for `AlgHom`/`AlgEquiv` This is a preparatory PR for the refactor of `AlgHom` to be semilinear (see #38376). This PR does not add or remove any results and only moves things around to reduce the diff for the future refactor. Namely, we do the following: - Re-order variables in `AlgHom` and `AlgEquiv` so that `CommSemiring R` directly follows `R`. This is needed in the semialgebra definition. - Move `comp` and `trans` API later in respective files so that the extra variables needed for those lemmas can be sectioned better. - Similarly move some `congr` results in `Equiv.lean` to their own sections. - Align variable names in `Equiv.lean` to match `Hom.lean` --- - [ ] depends on: #38950 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) blocked-by-other-PR 493/429 Mathlib/Algebra/Algebra/Equiv.lean,Mathlib/Algebra/Algebra/Hom.lean,Mathlib/Algebra/Algebra/Spectrum/Basic.lean,Mathlib/Algebra/Algebra/Subalgebra/Centralizer.lean,Mathlib/Algebra/Azumaya/Basic.lean,Mathlib/Algebra/MvPolynomial/Equiv.lean,Mathlib/Algebra/Polynomial/AlgebraMap.lean,Mathlib/AlgebraicGeometry/AffineSpace.lean,Mathlib/Analysis/CStarAlgebra/GelfandDuality.lean,Mathlib/FieldTheory/Extension.lean,Mathlib/FieldTheory/Galois/Basic.lean,Mathlib/FieldTheory/Galois/Notation.lean,Mathlib/FieldTheory/Isaacs.lean,Mathlib/FieldTheory/KummerExtension.lean,Mathlib/FieldTheory/LinearDisjoint.lean,Mathlib/FieldTheory/Minpoly/Field.lean,Mathlib/FieldTheory/Normal/Basic.lean,Mathlib/FieldTheory/SeparableDegree.lean,Mathlib/FieldTheory/SeparablyGenerated.lean,Mathlib/LinearAlgebra/Charpoly/Basic.lean,Mathlib/LinearAlgebra/TensorProduct/Subalgebra.lean,Mathlib/NumberTheory/Cyclotomic/Gal.lean,Mathlib/RingTheory/AlgebraTower.lean,Mathlib/RingTheory/Algebraic/MvPolynomial.lean,Mathlib/RingTheory/Bialgebra/Equiv.lean,Mathlib/RingTheory/Bialgebra/Hom.lean,Mathlib/RingTheory/DividedPowerAlgebra/Init.lean,Mathlib/RingTheory/Extension/Presentation/Basic.lean,Mathlib/RingTheory/Extension/Presentation/Core.lean,Mathlib/RingTheory/GradedAlgebra/AlgHom.lean,Mathlib/RingTheory/GradedAlgebra/TensorProduct.lean,Mathlib/RingTheory/Ideal/Quotient/Operations.lean,Mathlib/RingTheory/MvPolynomial/Symmetric/FundamentalTheorem.lean,Mathlib/RingTheory/NoetherNormalization.lean,Mathlib/RingTheory/Polynomial/Cyclotomic/Factorization.lean,Mathlib/RingTheory/Polynomial/Quotient.lean,Mathlib/RingTheory/Smooth/Basic.lean,Mathlib/RingTheory/Smooth/IntegralClosure.lean,Mathlib/RingTheory/TensorProduct/Maps.lean,MathlibTest/GalNotation.lean 40 4 ['github-actions', 'mathlib-dependent-issues', 'mathlib-merge-conflicts'] nobody
0-43763
12 hours ago
17-18826
17 days ago
0-8935
2 hours
37577 SnirBroshi
author:SnirBroshi
 feat(Combinatorics/SimpleGraph/Walk): upgrade subset theorems to sublist/prefix/suffix Upgrades theorems about `p.support ⊆ q.support` / `p.darts ⊆ q.darts` / `p.edges ⊆ q.edges` to `List.IsInfix`/`List.IsSuffix`/`List.Sublist`, which imply the subset versions. Also adds `cycleBypass` sublist lemmas that were missing, and golfs `length_bypass_le` and `bypass_eq_self_of_length_le` using the new sublist theorems. Co-authored-by: Iván Renison <85908989+IvanRenison@users.noreply.github.com> --- Except for a couple of `cycleBypass` ones, I did not add such theorems where there was no subset theorem to begin with (e.g. `(p.take n).darts <+: p.darts`), as they are usually not worth stating since they're trivial and simp proves them. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-combinatorics maintainer-merge 112/81 Mathlib/Combinatorics/SimpleGraph/Acyclic.lean,Mathlib/Combinatorics/SimpleGraph/Paths.lean,Mathlib/Combinatorics/SimpleGraph/Walk/Basic.lean,Mathlib/Combinatorics/SimpleGraph/Walk/Decomp.lean,Mathlib/Combinatorics/SimpleGraph/Walk/Operations.lean 5 5 ['YaelDillies', 'b-mehta', 'github-actions'] nobody
0-43556
12 hours ago
10-28540
10 days ago
49-60628
49 days
38376 smmercuri
author:smmercuri
 refactor(Algebra): semialgebra maps --- - [x] depends on: #38715 - [ ] depends on: #38964 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) WIP blocked-by-other-PR 776/587 Mathlib/Algebra/Algebra/Equiv.lean,Mathlib/Algebra/Algebra/Hom.lean,Mathlib/Algebra/Algebra/Prod.lean,Mathlib/Algebra/Algebra/Spectrum/Basic.lean,Mathlib/Algebra/Algebra/TransferInstance.lean,Mathlib/Algebra/Algebra/Unitization.lean,Mathlib/Algebra/Colimit/DirectLimit.lean,Mathlib/Algebra/DirectSum/Algebra.lean,Mathlib/Algebra/MvPolynomial/Equiv.lean,Mathlib/Algebra/Polynomial/AlgebraMap.lean,Mathlib/Algebra/SkewMonoidAlgebra/Basic.lean,Mathlib/Algebra/SkewMonoidAlgebra/Lift.lean,Mathlib/Algebra/Star/StarAlgHom.lean,Mathlib/FieldTheory/CardinalEmb.lean,Mathlib/FieldTheory/Extension.lean,Mathlib/FieldTheory/Galois/Basic.lean,Mathlib/FieldTheory/Galois/Notation.lean,Mathlib/FieldTheory/Galois/Profinite.lean,Mathlib/FieldTheory/KummerExtension.lean,Mathlib/FieldTheory/LinearDisjoint.lean,Mathlib/FieldTheory/Normal/Basic.lean,Mathlib/FieldTheory/Normal/Defs.lean,Mathlib/FieldTheory/RatFunc/Basic.lean,Mathlib/FieldTheory/SeparableDegree.lean,Mathlib/FieldTheory/SplittingField/IsSplittingField.lean,Mathlib/LinearAlgebra/FreeProduct/Basic.lean,Mathlib/LinearAlgebra/Matrix/ToLin.lean,Mathlib/LinearAlgebra/SymmetricAlgebra/Basic.lean,Mathlib/LinearAlgebra/TensorProduct/Subalgebra.lean,Mathlib/NumberTheory/Cyclotomic/Gal.lean,Mathlib/RingTheory/AdicCompletion/Algebra.lean,Mathlib/RingTheory/Adjoin/Field.lean,Mathlib/RingTheory/AdjoinRoot.lean,Mathlib/RingTheory/AlgebraTower.lean,Mathlib/RingTheory/AlgebraicIndependent/Transcendental.lean,Mathlib/RingTheory/Bialgebra/Equiv.lean,Mathlib/RingTheory/Bialgebra/Hom.lean,Mathlib/RingTheory/Derivation/ToSquareZero.lean,Mathlib/RingTheory/Etale/Field.lean,Mathlib/RingTheory/Etale/QuasiFinite.lean,Mathlib/RingTheory/Etale/StandardEtale.lean,Mathlib/RingTheory/Extension/Generators.lean,Mathlib/RingTheory/Extension/Presentation/Core.lean,Mathlib/RingTheory/FinitePresentation.lean,Mathlib/RingTheory/GradedAlgebra/AlgHom.lean,Mathlib/RingTheory/Ideal/Quotient/Operations.lean,Mathlib/RingTheory/IntegralClosure/IsIntegralClosure/Basic.lean,Mathlib/RingTheory/Kaehler/Basic.lean,Mathlib/RingTheory/LocalRing/ResidueField/Fiber.lean,Mathlib/RingTheory/Localization/FractionRing.lean,Mathlib/RingTheory/MvPowerSeries/Basic.lean,Mathlib/RingTheory/MvPowerSeries/Evaluation.lean,Mathlib/RingTheory/Norm/Transitivity.lean,Mathlib/RingTheory/Polynomial/Quotient.lean,Mathlib/RingTheory/RootsOfUnity/PrimitiveRoots.lean,Mathlib/RingTheory/Smooth/Basic.lean,Mathlib/RingTheory/Smooth/IntegralClosure.lean,Mathlib/RingTheory/Smooth/Kaehler.lean,Mathlib/RingTheory/TensorProduct/Basic.lean,Mathlib/RingTheory/Trace/Basic.lean,Mathlib/RingTheory/Unramified/Pi.lean,Mathlib/Topology/Algebra/Algebra.lean,Mathlib/Topology/Algebra/Module/Spaces/CharacterSpace.lean,Mathlib/Topology/ContinuousMap/StoneWeierstrass.lean,MathlibTest/GalNotation.lean 65 12 ['github-actions', 'leanprover-radar', 'mathlib-dependent-issues', 'mathlib-merge-conflicts', 'smmercuri'] nobody
0-43346
12 hours ago
30-22461
30 days ago
0-8
8 seconds
39646 YaelDillies
author:YaelDillies
 feat(Algebra/Order): maximally varying version of `prod_le_prod_of_subset_of_one_le` We need this for `gcongr`. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra
label:t-algebra$
 49/26 Mathlib/Algebra/Module/ZLattice/Summable.lean,Mathlib/Algebra/Order/BigOperators/Group/Finset.lean,Mathlib/Algebra/Order/BigOperators/GroupWithZero/Finset.lean,Mathlib/Analysis/Complex/Exponential.lean 4 7 ['YaelDillies', 'b-mehta', 'github-actions'] nobody
0-42489
11 hours ago
1-43257
1 day ago
1-46424
1 day
39690 b-mehta
author:b-mehta
 feat(Analysis/Complex/Exponential): add new bounds on exponential We add new upper bounds on Real.exp in terms of 2x/(2+x), and use these to move some bounds on log higher in mathlib. We also add a lemma for the common bound (1+1/n)^n <= e, though this is a special-case of `one_sub_div_pow_le_exp_neg` (immediately before), but is added for convenience and discoverability, as this is a "well-known" bound. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-analysis 35/10 Mathlib/Analysis/Complex/Exponential.lean,Mathlib/Analysis/Complex/ExponentialBounds.lean,Mathlib/Analysis/SpecialFunctions/Log/Basic.lean,Mathlib/Analysis/SpecialFunctions/Log/Deriv.lean 4 1 ['github-actions'] nobody
0-42205
11 hours ago
0-42288
11 hours ago
0-42825
11 hours
38970 themathqueen
author:themathqueen
 chore(Analysis/InnerProductSpace/Projection): rename `orthogonalProjection` to `orthogonalProjectionOnto` To match the current (continuous) linear projection to a submodule along its complement `Submodule.projection(Onto)(L)`, we change `Submodule.orthogonalProjection` to `Submodule.orthogonalProjectionOnto` (and later will change `Submodule.starProjection` to `Submodule.orthogonalProjection`). --- Zulip thread: [#**mathlib4>Two variants of linear projections**](https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/Two.20variants.20of.20linear.20projections/with/591234152) [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-analysis 267/183 Mathlib/Analysis/InnerProductSpace/Adjoint.lean,Mathlib/Analysis/InnerProductSpace/GramSchmidtOrtho.lean,Mathlib/Analysis/InnerProductSpace/MeanErgodic.lean,Mathlib/Analysis/InnerProductSpace/PiL2.lean,Mathlib/Analysis/InnerProductSpace/Positive.lean,Mathlib/Analysis/InnerProductSpace/ProdL2.lean,Mathlib/Analysis/InnerProductSpace/Projection/Basic.lean,Mathlib/Analysis/InnerProductSpace/Projection/FiniteDimensional.lean,Mathlib/Analysis/InnerProductSpace/Projection/Reflection.lean,Mathlib/Analysis/InnerProductSpace/Projection/Submodule.lean,Mathlib/Analysis/InnerProductSpace/Spectrum.lean,Mathlib/Analysis/InnerProductSpace/l2Space.lean,Mathlib/Geometry/Euclidean/Projection.lean,Mathlib/Geometry/Euclidean/Volume/Measure.lean,Mathlib/Geometry/Manifold/Instances/Sphere.lean,Mathlib/MeasureTheory/Function/ConditionalExpectation/CondexpL2.lean,Mathlib/MeasureTheory/Measure/Hausdorff.lean,Mathlib/Topology/MetricSpace/HausdorffDimension.lean,docs/overview.yaml,docs/undergrad.yaml 20 16 ['ADedecker', 'eric-wieser', 'github-actions', 'themathqueen'] mcdoll
assignee:mcdoll
0-41765
11 hours ago
14-49179
14 days ago
16-62781
16 days
39539 yuanyi-350
author:yuanyi-350
 feat(NumberTheory): prove Mertens' first theorem For any natural number $n \geq 2$, the absolute value of the difference between the sum over all primes $p \leq n$ of $\frac{\log p}{p}$ and $\log n$ is at most 2. WIP 657/2 Mathlib.lean,Mathlib/Analysis/Complex/ExponentialBounds.lean,Mathlib/NumberTheory/Mertens.lean 3 3 ['github-actions', 'vihdzp'] nobody
0-41290
11 hours ago
4-17388
4 days ago
0-296
4 minutes
37598 IvanRenison
author:IvanRenison
 feat(Combinatorics/SimpleGraph/Coloring): add lemmas about coloring and maps --- Idea from this Zulip thread: [graph theory>Second Order Monadic Logic for Graph](https://leanprover.zulipchat.com/#narrow/channel/252551-graph-theory/topic/Second.20Order.20Monadic.20Logic.20for.20Graph/with/583013775) [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-combinatorics 37/12 Mathlib/Combinatorics/SimpleGraph/Coloring/VertexColoring.lean,Mathlib/Combinatorics/SimpleGraph/Maps.lean 2 27 ['IvanRenison', 'SnirBroshi', 'YaelDillies', 'b-mehta', 'github-actions', 'mathlib-bors', 'mathlib-merge-conflicts'] YaelDillies
assignee:YaelDillies
0-41151
11 hours ago
6-13198
6 days ago
46-79727
46 days
39681 joneugster
author:joneugster
 chore: move test files and recapitalise file names (part 2) Moves all test files about linters to a folder `Linter` and capitalises their names. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) file-removed awaiting-author 21/21 MathlibTest/Linter/DeprecatedModule/DeprecatedModule.lean,MathlibTest/Linter/DeprecatedModule/DeprecatedModuleAllTest.lean,MathlibTest/Linter/DeprecatedModule/DeprecatedModuleMetaTest.lean,MathlibTest/Linter/DeprecatedModule/DeprecatedModuleNew.lean,MathlibTest/Linter/DeprecatedModule/DeprecatedModulePublicMetaTest.lean,MathlibTest/Linter/DeprecatedModule/DeprecatedModulePublicTest.lean,MathlibTest/Linter/DeprecatedModule/DeprecatedModuleTest.lean,MathlibTest/Linter/DeprecatedSyntaxLinter.lean,MathlibTest/Linter/DocPrime.lean,MathlibTest/Linter/DocString.lean,MathlibTest/Linter/EmptyLine.lean,MathlibTest/Linter/FlexibleLinter.lean,MathlibTest/Linter/ForbiddenModuleNames.lean,MathlibTest/Linter/ImportHeavyFlexibleLinter.lean,MathlibTest/Linter/ModuleCasing.lean,MathlibTest/Linter/OldObtain.lean,MathlibTest/Linter/PrivateModule/HasOnlyPrivate.lean,MathlibTest/Linter/PrivateModule/HasPublic.lean,MathlibTest/Linter/PrivateModule/ImportOnly.lean,MathlibTest/Linter/PrivateModule/Initialize.lean,MathlibTest/Linter/PrivateModule/NonModule.lean,MathlibTest/Linter/PrivateModule/Notation3.lean,MathlibTest/Linter/PrivateModule/ReservedName1.lean,MathlibTest/Linter/PrivateModule/ReservedName2.lean 24 10 ['github-actions', 'grunweg', 'joneugster'] grunweg
assignee:grunweg
0-41096
11 hours ago
0-42492
11 hours ago
0-21634
6 hours
38837 kbuzzard
author:kbuzzard
 feat: add "higher instance priority" library note We add a library note explaining the logic in making instances like `Semiring.toModule` higher priority than the default. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) - [x] depends on: #38704 [only because one of the claims in the note is false without it] 19/0 Mathlib/Algebra/Group/Action/Defs.lean,Mathlib/Algebra/GroupWithZero/Action/Defs.lean,Mathlib/Algebra/HierarchyDesign.lean,Mathlib/Algebra/Module/Defs.lean 4 5 ['github-actions', 'kbuzzard', 'mathlib-dependent-issues', 'mathlib-merge-conflicts'] nobody
0-41028
11 hours ago
12-9133
12 days ago
12-82015
12 days
37618 WenrongZou
author:WenrongZou
 feat(PowerSeries): rename a power series as multivariate power series --- In this PR, I define the `PowerSeries.toMvPowerSeries` which use `Polynomial.toMvPolynomial` as reference. Also there is some missing APIs in `MvPowerSeries/Equiv.lean` with respect to `MvPolynomial/Equiv.lean`. I will try to add them in next several PRs. - [x] depends on: #37576 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-ring-theory large-import 77/1 Mathlib/RingTheory/MvPowerSeries/Equiv.lean 1 3 ['github-actions', 'mathlib-dependent-issues', 'mathlib-merge-conflicts'] riccardobrasca
assignee:riccardobrasca
0-40967
11 hours ago
0-41034
11 hours ago
20-51123
20 days
36275 smmercuri
author:smmercuri
 feat: norm for the finite adele ring of a number field --- - [x] depends on: #35820 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) 137/1 Mathlib.lean,Mathlib/NumberTheory/NumberField/Completion/FinitePlace.lean,Mathlib/NumberTheory/NumberField/FiniteAdeleRing.lean,Mathlib/Topology/Algebra/Valued/NormedValued.lean 4 4 ['github-actions', 'mathlib-dependent-issues', 'mathlib-merge-conflicts'] nobody
0-40475
11 hours ago
0-40548
11 hours ago
0-41519
11 hours
38127 riccardobrasca
author:riccardobrasca
 feat: add ClassGroup.extendedHom --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) file-removed t-algebra t-ring-theory
label:t-algebra$
 162/6 Mathlib.lean,Mathlib/AlgebraicGeometry/EllipticCurve/Affine/Point.lean,Mathlib/NumberTheory/ClassNumber/Finite.lean,Mathlib/NumberTheory/NumberField/CanonicalEmbedding/FundamentalCone.lean,Mathlib/RingTheory/ClassGroup/Basic.lean,Mathlib/RingTheory/ClassGroup/ExtendedHom.lean,Mathlib/RingTheory/FractionalIdeal/Extended.lean,Mathlib/RingTheory/PicardGroup.lean,Mathlib/RingTheory/UniqueFactorizationDomain/ClassGroup.lean 9 22 ['faenuccio', 'github-actions', 'mathlib-merge-conflicts', 'riccardobrasca'] mattrobball
assignee:mattrobball
0-39547
10 hours ago
0-39637
10 hours ago
34-86008
34 days
38318 JovanGerb
author:JovanGerb
 feat(GRewrite): new `grw` implementation This PR adds a new implementation of the `grewrite` tactic. It replaces `grw` with the new implementation. The old implementation can be used with `grw +useKAbstract`. New features: - The new `grw` can rewrite terms with bound variables. - The new `grw` will only rewrite in places where this is valid. Previously, if there were both valid and non-valid positions, it would try rewriting everywhere and then complain. Future features that will build on the new implementation: - I'd like to add support for strict rewrites that can change the strictness of parts of the goal. This would require the concept of asymmetric `gcongr` lemmas, something like `le_imp_lt_of_lt_left` and `le_imp_lt_of_lt_right`. An example of such a lemma that already exists in mathlib is `Ico_subset_Ioo_left`. - I'd like to improve the support for rewriting with symmetric relations such as `=ᵥ`. The following doesn't work very well yet: ``` variable {R : Type*} [CommRing R] [ValuativeRel R] {x y z : R} example (h : x =ᵥ y) : x <ᵥ z ↔ y <ᵥ z := by grw [h] ``` Limitations: - The new implementation does not support occurrences. So, `nth_grw` still uses the old `kabstract`-based implementation. The reason is that there are often multiple `gcongr` lemmas for rewriting in the same place (e.g. `add_le_add` and `add_le_add_left`), and it's tricky to keep track of exactly what is "the same" subexpression. - The new implementation tries `gcongr` lemmas one by one, and commits to the first `gcongr` lemma that lets us do a rewrite. This means that we need to lower the priority of `add_le_add_left`, so that `add_le_add` is preferred, so that we can rewrite on both sides of `+` at the same time. However, `mul_le_mul_of_nonneg_left` and `mul_le_mul_of_nonneg_right` are still tried before `mul_le_mul`, to avoid getting unnecessary side goals. - Because the new term is constructed from `gcongr` lemmas, rather than by instantiating the result of `kabstract`, it may be that metadata gets lost, or that some implicit arguments change. For example, rewriting inside `a ≤ b` for `a b : Nat` will change the instance argument from `Nat.instLE` to `Nat.instPreorder.toLE`. This is not really a problem. - Some problems arise when implementing a rewriting tactic that can rewrite under binders, because metavariables have a fixed local context of free variables that they are allowed to depend on. This issue also affects the new `rw` tactic that the FRO is currenlty working on. This PR works around this by "illegally" changing the local context of metavariabes, so as to allow them to depend on bound variables. This has the unfortunate side effect that the "Expected Type" view can get messed up when rewriting bound variables, because the expression is being delaborated with the wrong local context. But I think this is only a minor problem. We coould reconsider this design when the new `rw` tactic is done. Changes to `gcongr`: - The `@[goncgr]` attribute now checks more thoroughly whether the given lemma is of the right form. Some lemmas are not suitable for use in `grw`, but they still "feel" like a `gcongr` lemma, so we still allow them to be used in `gcongr`. For such cases I've added a linter warning that can be turned off. - I've refactored how `gcongr` lemmas are applied, in order to share this code between `gcongr` and `grw`. Now, binder names are taken from the goal when possible, rather than not giving any name to new free variables. This improves `gcongr` (as it means you don't anymore need to write `gcongr with ...` to give the variable a name), and allows `grw` to preserve binder names in the goal. The grewrite test file now tests the new `grw` implementation. Should I make a copy of the test file to also test the old implementation? I have put myself as the copyright holder, instead of Sebastian Zimmer, as I think this more accurately reflect code ownership. The original `grw` PR was by Sebastian in 2023, but it was majorly rewritten by me in 2025. Sebastian is still in the list of authors. --- - [x] depends on: #38558 - [x] depends on: #38556 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-meta 686/254 Mathlib/Algebra/BigOperators/Finsupp/Basic.lean,Mathlib/Algebra/Order/Group/Indicator.lean,Mathlib/Algebra/Order/Monoid/Unbundled/Basic.lean,Mathlib/Algebra/Order/Sub/Defs.lean,Mathlib/Analysis/CStarAlgebra/Extreme.lean,Mathlib/Analysis/Convex/StrictCombination.lean,Mathlib/Analysis/Distribution/Support.lean,Mathlib/Combinatorics/Graph/Maps.lean,Mathlib/Combinatorics/SimpleGraph/Clique.lean,Mathlib/Data/Finsupp/Order.lean,Mathlib/MeasureTheory/Function/SimpleFunc.lean,Mathlib/MeasureTheory/Integral/Average.lean,Mathlib/MeasureTheory/Integral/IntervalIntegral/AbsolutelyContinuousFun.lean,Mathlib/Order/Basic.lean,Mathlib/Probability/Distributions/Gaussian/HasGaussianLaw/Independence.lean,Mathlib/Tactic/GCongr/Core.lean,Mathlib/Tactic/GRewrite/Core.lean,Mathlib/Tactic/GRewrite/Elab.lean,Mathlib/Topology/MetricSpace/ThickenedIndicator.lean,MathlibTest/GCongr/GCongr.lean,MathlibTest/GCongr/implications.lean,MathlibTest/Tactic/GRewrite.lean 22 41 ['JovanGerb', 'PatrickMassot', 'Vierkantor', 'github-actions', 'leanprover-radar', 'mathlib-bors', 'mathlib-dependent-issues', 'mathlib-merge-conflicts'] dwrensha
assignee:dwrensha
0-39491
10 hours ago
0-39527
10 hours ago
14-8343
14 days
39411 JovanGerb
author:JovanGerb
 feat(Push): allow pushing `∀` through `∃` This PR adds `Classical.skolem` to the `push` set. This allows pusing a forall through an exists, which can sometimes be convenient. This PR also removes `forall_self_imp` from the `push` set. I'm not sure why I added it in the first place - I think it is out of scope. This PR also fixes a subtle bug in `push` which causes `push` to not be idempotent. Namely that the default value of `post` returns `.done` instead of `.continue`, causing the tactic to stop earlier than it should/ --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-meta 9/3 Mathlib/Tactic/Push.lean,MathlibTest/Tactic/Push.lean 2 2 ['github-actions', 'mathlib-merge-conflicts'] nobody
0-39466
10 hours ago
0-36360
10 hours ago
0-6372
1 hour
39662 kim-em
author:kim-em
 feat(scripts): add cross-reference tag tooling This PR adds two standalone scripts in `scripts/` to support review of PRs that add `@[stacks]`, `@[kerodon]`, or `@[wikidata]` attributes. Neither needs a `lakefile.lean` entry — both run via `lake env lean --run` and depend only on Lean core (plus `curl` on `PATH` for the fetcher). * `scripts/crossref-snippet.lean` fetches a one-line label/description for one or more tags from the upstream database. Wikidata uses the `wbgetentities` API (with recovery when one bad QID poisons a batch); Stacks and Kerodon use the documented Gerby `/data/tag//content/statement` endpoint with a tolerant HTML→text strip that survives `<` inside math. Exit codes distinguish all-resolved (0) from missing (2) from transient network failure (3). When `CROSSREF_CACHE_DIR` is set, responses are memoised per `(database, tag)` so repeat lookups are instant. * `scripts/extract-crossref-tags.lean` walks a `.lean` file (or the added lines of a git diff range) and emits TSV of every cross-reference attribute it finds, paired with the declaration it decorates. A byte-level scanner correctly skips string literals and line/block comments, handles multi-attribute blocks (`@[simp, stacks 01AB]`), multi-line attribute blocks, doc comments between attribute and declaration, and modifier keywords (`private`, `noncomputable`, …). Signatures are collapsed to one line for downstream consumption. Sample usage: ```sh lake env lean --run scripts/crossref-snippet.lean wikidata Q11518 # Q11518 Pythagorean theorem relation in Euclidean geometry among the three sides of a right triangle lake env lean --run scripts/crossref-snippet.lean stacks 01AB # 01AB Lemma 14.32.3 Lemma 14.32.3. Let \$A\$, \$B\$ be sets ... lake env lean --run scripts/extract-crossref-tags.lean --file Mathlib/Algebra/CharP/Basic.lean # stacks Mathlib/Algebra/CharP/Basic.lean 195 09FS First part. ... instance charP instance charP (n : ℕ) [NeZero n] : CharP (Fin n) n lake env lean --run scripts/extract-crossref-tags.lean --diff origin/master..HEAD --db wikidata ``` The scripts are deliberately text-only — they do not elaborate the files they inspect. That lets the companion CI workflow (#39666) operate on PR files as data without executing PR code under a privileged GitHub token. Stacked follow-up PRs: 1. #39664 — LSP widget surfacing snippets in the editor when the cursor sits on a cross-reference attribute, sharing the fetch logic via a new `Mathlib/Tactic/CrossRef/Fetch.lean` module. 2. #39666 — GitHub Actions workflow that posts a once-per-PR comment with tag / signature / snippet tables and fails CI on unresolved tags (orchestrator lives in mathlib-ci#39). 🤖 Prepared with Claude Code CI awaiting-author 971/0 scripts/README.md,scripts/crossref.lean 2 1 ['github-actions'] nobody
0-39136
10 hours ago
0-39136
10 hours ago
0-9499
2 hours
39598 grunweg
author:grunweg
 feat(Tactic/ToFun): warn if the provided name matches the autogenerat… …ed one --- The test needs re-blessing once CI has passed. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) easy t-meta 13/3 Mathlib/Tactic/ToFun.lean,MathlibTest/ToFun.lean 2 4 ['JovanGerb', 'github-actions', 'grunweg'] nobody
0-38836
10 hours ago
0-71145
19 hours ago
0-70891
19 hours
39120 wwylele
author:wwylele
 feat(MeasureTheory,Euclidean): area formula This PR aims to prove the generalization of [MeasureTheory.lintegral_abs_det_fderiv_eq_addHaar_image](https://leanprover-community.github.io/mathlib4_docs/Mathlib/MeasureTheory/Function/Jacobian.html#MeasureTheory.lintegral_abs_det_fderiv_eq_addHaar_image) in inner product spaces, where the domain and the codomain are allowed to be different. WIP. TODO: - Remove the restriction on f'.ker = bot - Rmoeve [SecondCountableTopology V] - Clean up the proof AI usage disclosure: Aristotle were used to prove some "trivial" lemma (measurability, summability etc.) --- - [ ] depends on: #37295 - [ ] depends on: #39132 - [ ] depends on: #39160 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) blocked-by-other-PR 1957/5 Mathlib.lean,Mathlib/Analysis/InnerProductSpace/Adjoint.lean,Mathlib/Analysis/InnerProductSpace/NormDet.lean,Mathlib/Geometry/Euclidean/Volume/Area.lean,Mathlib/MeasureTheory/Function/Jacobian.lean,docs/references.bib 6 2 ['github-actions', 'mathlib-dependent-issues'] nobody
0-38101
10 hours ago
unknown
0-0
0 seconds
39636 RaggedR
author:RaggedR
 feat(RingTheory/HopfAlgebra): ascending Pochhammer is of binomial type This adds two concrete examples to the delta operator framework from #39465, illustrating the change of basis between the two classical families of binomial-type sequences beyond the monomials. The first file proves that the ascending Pochhammer (rising factorial) sequence is of binomial type. The backward difference operator ∇f(x) = f(x) − f(x−1) is defined, shown to be a delta operator, and the ascending Pochhammer sequence is verified as its basic sequence via a telescoping argument. The final theorem `ascPochhammer_isBinomialType` is a one-line application of Rota's classification from #39465, complementing the existing `descPochhammer_isBasicSequence_forwardDiff` for falling factorials and the forward difference. The second file computes the Jabotinsky matrix entries of the geometric delta series y/(1−y), giving the unnormalized Lah numbers C(n−1, k−1) as the change-of-basis coefficients between rising and falling factorials. The proof factors the power (y/(1−y))ᵏ = Xᵏ · (1−X)⁻ᵏ and applies Mathlib's existing `mk_one_pow_eq_mk_choose_add` for the negative binomial series. --- - [ ] depends on: #39465 --- LLM tools were used to assist with Lean formalization. The mathematical content is the author's own work. t-ring-theory new-contributor blocked-by-other-PR LLM-generated 1596/0 Mathlib.lean,Mathlib/RingTheory/HopfAlgebra/AscPochhammer.lean,Mathlib/RingTheory/HopfAlgebra/BinomialType.lean,Mathlib/RingTheory/HopfAlgebra/DeltaOperator.lean,Mathlib/RingTheory/HopfAlgebra/Lah.lean,Mathlib/RingTheory/HopfAlgebra/Polynomial.lean 6 8 ['RaggedR', 'github-actions', 'mathlib-dependent-issues', 'themathqueen'] nobody
0-36854
10 hours ago
1-70856
1 day ago
0-211
3 minutes
39530 RaggedR
author:RaggedR
 feat(Combinatorics/SimpleGraph): group actions on simple graphs This adds the first connection between Mathlib's MulAction and SimpleGraph libraries. The GraphAction class asserts that a group action on the vertex type preserves the adjacency relation, and builds on it to define vertex-transitivity and arc-transitivity for graphs. The GraphAction typeclass gives adj_smul_iff (the biconditional for group actions) and toIso (each group element induces a graph automorphism). The IsVertexTransitive class combines GraphAction with IsPretransitive, and IsArcTransitive requires transitivity on ordered adjacent pairs (arcs). The main theorem is the standard characterization: a graph is arc-transitive if and only if it is vertex-transitive and locally transitive (the stabilizer of each vertex acts transitively on its neighbors). The forward direction is proved directly by composing a vertex-transporting element with a neighbor-transporting stabilizer element. The reverse direction shows that an arc-transitive graph with no isolated vertices is vertex-transitive. These definitions are the algebraic graph theory prerequisites for formalizing coset graphs (Sabidussi's construction) and the characterization of symmetric graphs via double cosets and involutions (Lorimer's theorem). --- LLM tools were used to assist with Lean formalization. The mathematical content is the author's own work. t-combinatorics new-contributor LLM-generated 130/0 Mathlib.lean,Mathlib/Combinatorics/SimpleGraph/Action.lean 2 6 ['RaggedR', 'b-mehta', 'github-actions'] nobody
0-36842
10 hours ago
4-7810
4 days ago
4-7848
4 days
39498 RaggedR
author:RaggedR
 feat(RingTheory/HopfAlgebra): umbral operators via generating functions ## Umbral operators via generating functions This PR completes the formalization of the finite operator calculus on `R[X]` over a ℚ-algebra. The entire umbral calculus — every theorem, every lemma, zero sorry's — is now machine-checked, from the coalgebra axioms (PR #39410) through Rota's classification (PR #39465) to the umbral operator and its duality theory. Given a delta operator `Q` on `R[X]`, the **delta series** `f(y) = Σ (Q(X^k)).eval 0 / k! · y^k` is a formal power series with zero constant term and unit linear coefficient. Its compositional inverse `g` (obtained via Mathlib's `substInvOfIsUnit`) encodes the **basic sequence**: the polynomial `p_n` has coefficients `(p_n).coeff k = descFact(n, n-k) · [y^n](g^k)`. The **umbral operator** `U_Q` is the linear extension of `X^n ↦ p_n`. The key result is the **lowering property** `Q(p_{n+1}) = (n+1) • p_n`. The proof uses the natural duality of the finite operator calculus — the derivative pairing `⟨h, p⟩ = Σ_k coeff_k(h) · k! · p.coeff k` between `R⟦X⟧` and `R[X]`. Under this pairing, Q's adjoint is multiplication by f (proved via the convolution formula for power series coefficients), orthogonality gives `⟨f^k, p_n⟩ = n! · δ_{kn}` (from the Jabotinsky matrix identity), and non-degeneracy closes it (upper-triangular with unit diagonal, by descending induction). Three lines of mathematics, backed by a clean chain of lemmas. Once lowering is established, `umbralPoly_isBasicSequence` follows immediately, and `IsBasicSequence.isBinomialType` (from #39465) gives the coalgebra endomorphism property — completing the circle back to the Hopf algebra structure. References: Langer, *Macdonald Polynomials and Symmetric Functions* (arXiv:0907.3950), §1.2.2; Roman, *The Umbral Calculus*, Academic Press 1984, Ch. 2. Depends on #39410, #39465. --- LLM tools were used to assist with Lean formalization. The mathematical content is the author's own work. t-ring-theory new-contributor LLM-generated 2141/0 Mathlib.lean,Mathlib/RingTheory/HopfAlgebra/BinomialType.lean,Mathlib/RingTheory/HopfAlgebra/DeltaOperator.lean,Mathlib/RingTheory/HopfAlgebra/Polynomial.lean,Mathlib/RingTheory/HopfAlgebra/UmbralOperator.lean 5 5 ['RaggedR', 'github-actions'] nobody
0-36838
10 hours ago
0-44144
12 hours ago
0-45025
12 hours
39410 RaggedR
author:RaggedR
 feat(RingTheory/HopfAlgebra): Hopf algebra structure on polynomials (𝔾ₐ) This is the beginning of a formalization of the first half of my masters thesis (https://arxiv.org/abs/0907.3950). In particular we look at the ring of polynomials in a single variable with the usual multiplication and coproduct given by: Δ(X) = X ⊗ 1 + 1 ⊗ X. The counit is evaluation at zero, and the antipode is S(x) = -x. The mathematics itself comes from my masters thesis (and is well known). This is a first step towards an implementation of the umbral calculus of Gian-Carlo Rota and then its generalization to Symmetric Functions (which I believe is original). --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) --- LLM tools were used to assist with Lean formalization. The mathematical content is the author's own work. t-ring-theory new-contributor LLM-generated awaiting-author merge-conflict 8669/3906 Archive/Examples/IfNormalization/Result.lean,Mathlib.lean,Mathlib/Algebra/Algebra/Basic.lean,Mathlib/Algebra/Algebra/Bilinear.lean,Mathlib/Algebra/Algebra/Equiv.lean,Mathlib/Algebra/Algebra/Tower.lean,Mathlib/Algebra/BigOperators/Finsupp/Basic.lean,Mathlib/Algebra/BigOperators/Group/List/Basic.lean,Mathlib/Algebra/Category/ContinuousCohomology/Basic.lean,Mathlib/Algebra/Category/Grp/LeftExactFunctor.lean,Mathlib/Algebra/Category/ModuleCat/Monoidal/Basic.lean,Mathlib/Algebra/Category/ModuleCat/Presheaf/Sheafification.lean,Mathlib/Algebra/Category/ModuleCat/Sheaf/Generators.lean,Mathlib/Algebra/Category/ModuleCat/Sheaf/Quasicoherent.lean,Mathlib/Algebra/CharP/Frobenius.lean,Mathlib/Algebra/CubicDiscriminant.lean,Mathlib/Algebra/FreeAlgebra/Cardinality.lean,Mathlib/Algebra/Group/Action/Defs.lean,Mathlib/Algebra/Group/Finsupp.lean,Mathlib/Algebra/Group/Subgroup/Ker.lean,Mathlib/Algebra/Group/Subgroup/ZPowers/Lemmas.lean,Mathlib/Algebra/Group/Submonoid/Operations.lean,Mathlib/Algebra/Group/Torsion.lean,Mathlib/Algebra/Group/TypeTags/Hom.lean,Mathlib/Algebra/Group/Units/Defs.lean,Mathlib/Algebra/Homology/ExactSequence.lean,Mathlib/Algebra/Homology/ShortComplex/Ab.lean,Mathlib/Algebra/Homology/ShortComplex/ModuleCat.lean,Mathlib/Algebra/Lie/InvariantForm.lean,Mathlib/Algebra/Lie/Submodule.lean,Mathlib/Algebra/Module/Equiv/Basic.lean,Mathlib/Algebra/Module/Equiv/Defs.lean,Mathlib/Algebra/Module/StablyFree/Basic.lean,Mathlib/Algebra/Module/Submodule/Ker.lean,Mathlib/Algebra/Module/Submodule/LinearMap.lean,Mathlib/Algebra/Module/Submodule/Map.lean,Mathlib/Algebra/Module/Submodule/Range.lean,Mathlib/Algebra/MonoidAlgebra/Defs.lean,Mathlib/Algebra/MvPolynomial/Equiv.lean,Mathlib/Algebra/Order/Archimedean/Basic.lean,Mathlib/Algebra/Order/Floor/Extended.lean,Mathlib/Algebra/Order/Group/Defs.lean,Mathlib/Algebra/Order/Group/PosPart.lean,Mathlib/Algebra/Order/GroupWithZero/Canonical.lean,Mathlib/Algebra/Order/IsBotOne.lean,Mathlib/Algebra/Order/Ring/Cast.lean,Mathlib/Algebra/Order/Ring/Pow.lean,Mathlib/Algebra/Order/Star/Basic.lean,Mathlib/Algebra/Polynomial/Basic.lean,Mathlib/Algebra/Polynomial/Degree/Operations.lean,Mathlib/Algebra/Polynomial/Eval/Defs.lean,Mathlib/Algebra/Polynomial/Lifts.lean,Mathlib/Algebra/Polynomial/Monic.lean,Mathlib/Algebra/Ring/Defs.lean,Mathlib/Algebra/Ring/Equiv.lean,Mathlib/Algebra/Ring/Ext.lean,Mathlib/Algebra/Ring/GeomSum.lean,Mathlib/Algebra/Ring/GrindInstances.lean,Mathlib/Algebra/Ring/Parity.lean,Mathlib/Algebra/Ring/Subring/Basic.lean,Mathlib/Algebra/Star/Unitary.lean,Mathlib/Algebra/Vertex/HVertexOperator.lean,Mathlib/AlgebraicGeometry/EllipticCurve/Weierstrass.lean,Mathlib/AlgebraicGeometry/GammaSpecAdjunction.lean,Mathlib/AlgebraicGeometry/LimitsOver.lean,Mathlib/AlgebraicGeometry/Morphisms/Etale.lean,Mathlib/AlgebraicGeometry/Morphisms/SchemeTheoreticallyDominant.lean,Mathlib/AlgebraicGeometry/ProjectiveSpectrum/StructureSheaf.lean,Mathlib/AlgebraicGeometry/Properties.lean,Mathlib/AlgebraicGeometry/RationalMap.lean,Mathlib/AlgebraicGeometry/Sites/Affine.lean,Mathlib/AlgebraicGeometry/Sites/AffineEtale.lean,Mathlib/AlgebraicGeometry/Spec.lean,Mathlib/AlgebraicGeometry/SpreadingOut.lean,Mathlib/AlgebraicGeometry/StructureSheaf.lean,Mathlib/AlgebraicTopology/AlternatingFaceMapComplex.lean,Mathlib/AlgebraicTopology/SimplexCategory/GeneratorsRelations/NormalForms.lean,Mathlib/AlgebraicTopology/SimplicialSet/HomotopyCat.lean,Mathlib/AlgebraicTopology/SimplicialSet/StrictSegal.lean,Mathlib/AlgebraicTopology/SimplicialSet/TopAdj.lean,Mathlib/Analysis/Analytic/Binomial.lean,Mathlib/Analysis/Analytic/Constructions.lean,Mathlib/Analysis/Analytic/OfScalars.lean,Mathlib/Analysis/Asymptotics/TVS.lean,Mathlib/Analysis/CStarAlgebra/CStarMatrix.lean,Mathlib/Analysis/CStarAlgebra/ContinuousFunctionalCalculus/NonUnital.lean,Mathlib/Analysis/CStarAlgebra/ContinuousFunctionalCalculus/Order.lean,Mathlib/Analysis/CStarAlgebra/ContinuousFunctionalCalculus/Unital.lean,Mathlib/Analysis/CStarAlgebra/Spectrum.lean,Mathlib/Analysis/CStarAlgebra/Unitary/Connected.lean,Mathlib/Analysis/Calculus/ContDiff/Basic.lean,Mathlib/Analysis/Calculus/ContDiff/Operations.lean,Mathlib/Analysis/Calculus/Deriv/Add.lean,Mathlib/Analysis/Calculus/Deriv/Inv.lean,Mathlib/Analysis/Calculus/Deriv/Inverse.lean,Mathlib/Analysis/Calculus/Deriv/Pow.lean,Mathlib/Analysis/Calculus/FDeriv/Basic.lean,Mathlib/Analysis/Calculus/FDeriv/Equiv.lean,Mathlib/Analysis/Calculus/FDeriv/Norm.lean,Mathlib/Analysis/Calculus/FDeriv/OfCompLeft.lean 625 14 ['RaggedR', 'github-actions', 'themathqueen', 'wwylele'] nobody
0-35412
9 hours ago
1-11365
1 day ago
6-19410
6 days
38464 xroblot
author:xroblot
 feat(FieldTheory/Galois/IsGaloisGroup): generalize mulEquivCongr Generalizes `mulEquivCongr` from field extensions to domain extensions. The field version is renamed to `mulEquivCongr'`. Also adds some simp lemmas. --- - [x] depends on: #38377 t-algebra
label:t-algebra$
 56/15 Mathlib/FieldTheory/Galois/IsGaloisGroup.lean 1 2 ['github-actions', 'mathlib-dependent-issues'] nobody
0-35366
9 hours ago
14-22400
14 days ago
14-23165
14 days
39666 kim-em
author:kim-em
 feat(ci): cross-reference tag review via post-build lint + workflow_run Cross-reference tag review for PRs adding `@[stacks ...]`, `@[kerodon ...]`, or `@[wikidata ...]` attributes — implemented as a post-build lint step plus a `workflow_run`-triggered companion that posts the bot comment. **Why this shape.** The previous iteration of this PR ran an independent `pull_request_target` workflow that text-parsed PR source files. That was a workaround for not having a built Mathlib environment available in CI. With a post-build lint step we _do_ have the elaborated environment — so we read `Mathlib.CrossRef.tagExt` directly via `importModules (loadExts := true)` and cut ~250 LOC of bespoke byte-level scanner. **The three pieces:** - `scripts/crossref.lean` — the `extract` subcommand is gone. New `check --diff --tsv ` subcommand walks `tagExt`, looks up each tagged declaration's source module via `env.getModuleFor?`, filters by `git diff --name-only` of the PR range, and writes a machine-readable TSV. No Markdown, no network, no snippet fetching — that's the privileged workflow's job. Note: `withImportModules` passes `loadExts := false` and would leave `tagExt` empty for imported modules; we use `importModules (loadExts := true)` instead. - `.github/workflows/build_template.yml` — three new steps in `post_steps`, after the existing import-graph upload: 1. `lake env lean --run scripts/crossref.lean check --diff "${BASE_SHA}..HEAD" --tsv crossref-added.tsv` 2. Write `crossref-context.json` carrying the PR number and head SHA (so the `workflow_run` job doesn't have to rely on the unreliable `workflow_run.pull_requests[0].number`). 3. Upload both as a single `crossref-context` artifact. - `.github/workflows/crossref_review.yml` — rewritten. Trigger flips from `pull_request_target` to `workflow_run` on the build workflows. Downloads the artifact, resolves the PR number through a three-stage fallback (artifact JSON → workflow_run payload → `gh pr list` head SHA match), calls the mathlib-ci orchestrator (which now consumes the TSV and fetches snippets in Python directly with parallel `ThreadPoolExecutor` for Stacks/Kerodon), and posts via `update_PR_comment.sh`. Fails the check on any `missing` tag. **Privilege model.** The lint step runs with the PR's permissions and produces only a machine-readable TSV. The `workflow_run` job runs in the base ref's permission scope (with `pull-requests: write`), never executes anything from the artifact, fetches snippets server-side from three fixed upstream APIs, and builds the Markdown comment in trusted code. - [x] depends on: #39664 - [x] depends on: https://github.com/leanprover-community/mathlib-ci/pull/39 (rewrites the orchestrator to consume the TSV) 🤖 Prepared with Claude Code blocked-by-other-PR 1182/25 .github/workflows/build_template.yml,.github/workflows/crossref_review.yml,Mathlib.lean,Mathlib/Tactic.lean,Mathlib/Tactic/CrossRef/Fetch.lean,Mathlib/Tactic/CrossRefAttribute.lean,Mathlib/Tactic/Widget/CrossRefHover.lean,docs/workflows.md,scripts/README.md,scripts/crossref.lean 10 3 ['github-actions', 'kim-em', 'mathlib-dependent-issues'] nobody
0-34462
9 hours ago
unknown
0-0
0 seconds
39696 jsm28
author:jsm28
 refactor(LinearAlgebra/Orientation,LinearAlgebra/AffineSpace/FiniteDimensional): instances for arbitrary orientations Based on suggestions by @kim-em on Zulip https://leanprover.zulipchat.com/#narrow/channel/144837-PR-reviews/topic/PRs.20towards.20IMO.20geometry.202024.20P4/near/596946072 add convenience scoped instances for choosing an arbitrary orientation of a module, and for the `finrank` of the span of the vertices of a simplex. Note: I don't understand why the latter scoped instance is only found automatically in one of the two places using it; in `Sphere/Power.lean` it's necessary to use `Affine.Simplex.fact_finrank_direction_affineSpan_eq` rather than relying on typeclass inference, but in `Angle/Sphere.lean` typeclass inference suffices. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra t-euclidean-geometry
label:t-algebra$
 26/23 Archive/Imo/Imo2019Q2.lean,Mathlib/Geometry/Euclidean/Angle/Sphere.lean,Mathlib/Geometry/Euclidean/Sphere/Power.lean,Mathlib/LinearAlgebra/AffineSpace/FiniteDimensional.lean,Mathlib/LinearAlgebra/Orientation.lean 5 1 ['github-actions'] nobody
0-33401
9 hours ago
0-33476
9 hours ago
0-33187
9 hours
38348 mirajcs
author:mirajcs
 feat(Geometry/Curve): add Frenet–Serret framework --- This PR introduces a basic formalization of smooth parametrized curves in `ℝ³` (`EuclideanSpace ℝ (Fin 3)`) together with the Frenet frame and partial proofs of the Frenet–Serret formulas. Main contributions: * Define `ParametrizedDifferentiableCurve` as a smooth map on an open interval. * Define arc length and arc-length parametrization. * Define geometric quantities: - curvature `κ(t) = ‖α''(t)‖` - tangent, normal, and binormal vector fields - torsion via `‖B'(t)‖` * Introduce the `FrenetFrame` structure. * Prove key Frenet–Serret formulas: - `T' = κ • N` - `B' = -τ • N` - `N' = -κ • T + τ • B` The implementation relies on existing analysis and inner product space infrastructure, as well as properties of the cross product in `ℝ³`. Some intermediate lemmas about orthogonality and cross-product identities are included. At present, some results assume nonvanishing curvature/torsion and include auxiliary hypotheses about derivatives. These can be streamlined in future work. This development is intended as a foundation for further formalization of classical differential geometry (curves and surfaces). --- new-contributor t-differential-geometry awaiting-author 525/0 Mathlib.lean,Mathlib/Geometry/Curves/Basic.lean,Mathlib/Geometry/Curves/FrenetFrame.lean 3 18 ['bryangingechen', 'github-actions', 'mathlib-merge-conflicts', 'mirajcs', 'ocfnash', 'vihdzp', 'wwylele'] ocfnash
assignee:ocfnash
0-32898
9 hours ago
24-18864
24 days ago
6-55291
6 days
39653 RaggedR
author:RaggedR
 feat(Combinatorics): cellular surfaces, CSS quantum codes, and k = 2g This formalises CSS quantum error-correcting codes from surface tilings, following Breuckmann & Terhal (arXiv:1506.04029). CellularSurface encodes the combinatorial data of a 2-cell embedding of a graph on a closed surface: vertices, edges with endpoints, and faces whose boundaries are closed directed trails. The boundary operators ∂₁ (vertex-edge incidence) and ∂₂ (edge-face boundary) are matrices over F₂. The theorem `d1_mul_d2_eq_zero` proves ∂₁ ∘ ∂₂ = 0 (the chain complex condition) from the closed walk axiom: each vertex in a face boundary is visited an even number of times, so the sum vanishes in characteristic 2. The theorem `d1_rank_eq` proves rank(∂₁) = V − 1 for connected graphs — the kernel of ∂₁ᵀ is span{1} because elements of the kernel assign equal values to adjacent vertices, and connectivity propagates this to all vertices. The theorem `d2_rank_eq` proves rank(∂₂) = F − 1 for connected dual graphs with the two-sides condition (each edge borders exactly 2 faces). The main result `css_k_eq_2g` gives the number of logical qubits k = 2g. This is pure arithmetic: k = E − rank(∂₁) − rank(∂₂) = E − (V−1) − (F−1) = E − V − F + 2 = 2g by Euler's formula. No `native_decide` — all proofs are structural. --- LLM tools were used to assist with Lean formalization. The mathematical content is the author's own work. t-combinatorics new-contributor LLM-generated 1236/0 Mathlib.lean,Mathlib/Combinatorics/CellularSurface.lean,Mathlib/Combinatorics/SimpleGraph/Action.lean,Mathlib/Combinatorics/SimpleGraph/CosetGraph.lean,Mathlib/Combinatorics/SimpleGraph/QuotientGraph.lean,Mathlib/Combinatorics/SimpleGraph/Representation.lean,Mathlib/Combinatorics/SimpleGraph/Symmetric.lean 7 6 ['RaggedR', 'github-actions'] nobody
0-32397
8 hours ago
1-19307
1 day ago
1-28945
1 day
39465 RaggedR
author:RaggedR
 feat(RingTheory/HopfAlgebra): delta operators and Rota's classification This formalizes the fundamental theorem of the umbral calculus: that the basic sequence of any delta operator is a sequence of binomial type. A delta operator on R[X] is a shift-equivariant linear operator which is essentially a formal power series in the variable d/dx. Rota's classification theorem states that the images of monomials x^n under delta operators are sequences of binomial type. This PR defines `IsBinomialType`, `IsShiftEquivariant`, `IsDeltaOperator`, `forwardDiff`, and `IsBasicSequence`. It proves that monomials and falling factorials are of binomial type, that the derivative and forward difference are delta operators, and that basic sequences are of binomial type (Rota's classification). The mathematical content is from the first half of my masters thesis (arXiv:0907.3950). See also Rota, Kahaner, and Odlyzko, *Finite Operator Calculus* (JMAA 42, 1973) and Roman, *The Umbral Calculus* (Academic Press, 1984). Depends on #39410. --- LLM tools were used to assist with Lean formalization. The mathematical content is the author's own work. t-ring-theory new-contributor LLM-generated 1386/0 Mathlib.lean,Mathlib/RingTheory/HopfAlgebra/BinomialType.lean,Mathlib/RingTheory/HopfAlgebra/DeltaOperator.lean,Mathlib/RingTheory/HopfAlgebra/Polynomial.lean 4 7 ['RaggedR', 'github-actions', 'wwylele'] nobody
0-31487
8 hours ago
0-31489
8 hours ago
0-31927
8 hours
39699 kbuzzard
author:kbuzzard
 chore: refactor Algebra.TensorProduct.rightAlgebra (was #25481 ; now re-opened from a fork). The declaration `Algebra.TensorProduct.rightAlgebra` makes `A ⊗[R] B` into a `B`-algebra (here `R` is a `CommSemiring`, `A` is a `Semiring` and an `R`-algebra, and `B` is a `CommSemiring` and an `R`-algebra). It is not an instance because if A = B it causes a diamond. However in the many cases where A isn't B, it can occasionally be useful. However one could imagine that in the many cases where an R-module `M` also isn't `B`, it might occasionally be useful to make `M ⊗[R] B` into a `B`-module (and indeed I am finding this in FLT). With the current definition of `Algebra.TensorProduct.rightAlgebra` this is difficult to do without causing diamonds in the case when `M` happens to be an `R`-algebra (by which I mean "I failed to do this in finite time"). One fix for this is just to redefine `Algebra.TensorProduct.rightAlgebra` so that the `smul` field is ``` smul b ab := TensorProduct.comm _ _ _ (b • (TensorProduct.comm _ _ _ ab)) ``` i.e. literally "swap the product around, use mathlib's instance making `B ⊗[R] A` into a `B`-algebra, and then swap back". Then the same definition can be used to make `M ⊗[R] B` into a `B`-module and on the odd occasion where this point of view is useful, there is no diamond. This is what we do in this PR. After adding one simp lemma there is no breakage at all in mathlib. Furthermore, for those who have observed that we want to build on this algebra instance sometimes and, for example, add instances of the form "if M is finite over R then M ⊗[R] B is finite over B" -- these instances are really easy to add now with this new definition, because you simply pull back the analogous finite left module instance along the isomorphism M ⊗[R] B = B ⊗[R] M. Examples (from FLT, where the right action is put in a scope): ``` scoped instance [Module.Finite R M] : Module.Finite A (M ⊗[R] A) := Module.Finite.equiv (Module.TensorProduct.comm R A M) scoped instance [Module.Free R M] : Module.Free A (M ⊗[R] A) := Module.Free.of_equiv (Module.TensorProduct.comm R A M) ``` --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) 29/6 Mathlib/RingTheory/TensorProduct/Basic.lean 1 2 ['github-actions', 'kbuzzard'] nobody
0-30363
8 hours ago
0-30955
8 hours ago
0-69
1 minute
35296 Rida-Hamadani
author:Rida-Hamadani
 feat(SimpleGraph): taking or droping from a cycle results in a path --- - [x] depends on: #33249 - [ ] depends on: #35295 - [x] depends on: #35292 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) blocked-by-other-PR t-combinatorics merge-conflict 80/0 Mathlib/Combinatorics/SimpleGraph/Paths.lean,Mathlib/Combinatorics/SimpleGraph/Walks/Operations.lean,Mathlib/Data/List/Infix.lean 3 3 ['github-actions', 'mathlib-dependent-issues', 'mathlib-merge-conflicts'] nobody
0-29001
8 hours ago
97-34728
97 days ago
0-1258
20 minutes
39704 justus-springer
author:justus-springer
 chore(RingTheory/Smooth/StandardSmoothCotangent): fix typo in instance name --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-ring-theory easy 5/1 Mathlib/RingTheory/Smooth/StandardSmoothCotangent.lean 1 1 ['github-actions'] nobody
0-28012
7 hours ago
0-28099
7 hours ago
0-27810
7 hours
39694 themathqueen
author:themathqueen
 chore(RingTheory/TensorProduct/Basic): some API for `includeLeft` and `includeRight` --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-ring-theory easy 14/9 Mathlib/LinearAlgebra/TensorProduct/Tower.lean,Mathlib/RingTheory/TensorProduct/Basic.lean,Mathlib/RingTheory/TensorProduct/IncludeLeftSubRight.lean 3 1 ['github-actions'] nobody
0-27999
7 hours ago
0-28068
7 hours ago
0-30433
8 hours
31513 FLDutchmann
author:FLDutchmann
 feat(Tactic): `polynomial` tactic Implement tactic for proving equality of polynomials. This tactic is part of a larger suite (see https://github.com/leanprover-community/mathlib4/pull/30374). - [x] depends on: #31508 --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-meta awaiting-author 284/2 Mathlib.lean,Mathlib/Algebra/MvPolynomial/Basic.lean,Mathlib/RingTheory/Polynomial/Basic.lean,Mathlib/Tactic.lean,Mathlib/Tactic/Polynomial/Basic.lean,Mathlib/Tactic/Polynomial/Core.lean,MathlibTest/Polynomial.lean 7 18 ['FLDutchmann', 'github-actions', 'joneugster', 'mathlib-dependent-issues', 'mathlib4-merge-conflict-bot'] Vierkantor and joneugster
assignee:Vierkantor assignee:joneugster
0-27739
7 hours ago
14-21142
14 days ago
13-3667
13 days
39705 justus-springer
author:justus-springer
 doc(RingTheory/Extension/Generators): fix docstring variable name mismatch Fix a mismatch between documentation and code. The field is called `ι`, not `vars. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-ring-theory easy 9/9 Mathlib/RingTheory/Extension/Generators.lean 1 1 ['github-actions'] nobody
0-27296
7 hours ago
0-27228
7 hours ago
0-27388
7 hours
39589 ScottWe
author:ScottWe
 feat: simple lemmas about Hermitian matrices This pull request establishes some simple proofs about Hermitian algebras. In particular: - Unitary Hermitian matrices are self-inverse; - Hermitian matrices are in correspondence with skew-adjoint matrices. new-contributor awaiting-author t-algebra t-analysis
label:t-algebra$
 72/0 Mathlib.lean,Mathlib/Analysis/Matrix/SkewAdjoint.lean,Mathlib/LinearAlgebra/Matrix/Hermitian.lean,Mathlib/LinearAlgebra/Matrix/Unitary.lean 4 13 ['ScottWe', 'SnirBroshi', 'github-actions', 'j-loreaux', 'themathqueen'] nobody
0-27202
7 hours ago
3-2484
3 days ago
0-7869
2 hours
39706 justus-springer
author:justus-springer
 chore(RingTheory/Smooth/Basic): fix namespace of `mvPolynomial` instance This instance should be in the `FormallySmooth` namespace (it currently is just `Algebra.mvPolynomial`). --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-ring-theory easy 5/3 Mathlib/RingTheory/Smooth/Basic.lean,Mathlib/RingTheory/Smooth/Quotient.lean 2 1 ['github-actions'] nobody
0-26959
7 hours ago
0-27044
7 hours ago
0-26755
7 hours
39697 sorrachai
author:sorrachai
 feat(Data/Tree/Basic): add Membership instance, new notation, rename Tree Summary: 1. [Rename]([#CSLib > Splay tree PR: BinaryTree vs Tree @ 💬](https://leanprover.zulipchat.com/#narrow/channel/513188-CSLib/topic/Splay.20tree.20PR.3A.20BinaryTree.20vs.20Tree/near/596482765)) from Tree to BinaryTree, which propagates the changes to other files that use it. 2. Add membership instance, prove decidability of membership. 3. Add toListInOrder, toListPreOrder, toListPostOrder Suggestion based on the discussion in the cslib [thread](https://leanprover.zulipchat.com/#narrow/channel/513188-CSLib/topic/Splay.20tree.20PR/near/596568391)[#CSLib > Splay tree PR @ 💬](https://leanprover.zulipchat.com/#narrow/channel/513188-CSLib/topic/Splay.20tree.20PR/near/596568391). new-contributor 187/75 Mathlib/Combinatorics/Enumerative/Catalan/Tree.lean,Mathlib/Combinatorics/Enumerative/DyckWord.lean,Mathlib/Data/Tree/Basic.lean,Mathlib/Data/Tree/Get.lean,Mathlib/Data/Tree/Traversable.lean,Mathlib/Tactic/CancelDenoms/Core.lean,docs/overview.yaml 7 4 ['eric-wieser', 'github-actions', 'sorrachai'] nobody
0-26794
7 hours ago
0-29071
7 hours ago
0-30837
8 hours
38589 vlad902
author:vlad902
 feat(SimpleGraph): add universal vertex predicate Add the predicate `G.IsUniversal v` to indicate that `v` is a universal vertex, i.e. connected to all other vertices in `G`. This matches the recently added `G.IsIsolated v` predicate for isolated vertices. Co-authored-by: Justin Lai --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-combinatorics 63/10 Mathlib/Combinatorics/SimpleGraph/Basic.lean,Mathlib/Combinatorics/SimpleGraph/Connectivity/Connected.lean,Mathlib/Combinatorics/SimpleGraph/Finite.lean,Mathlib/Combinatorics/SimpleGraph/Tutte.lean,Mathlib/Combinatorics/SimpleGraph/UniversalVerts.lean 5 7 ['8e7', 'Rida-Hamadani', 'github-actions', 'vlad902'] nobody
0-26515
7 hours ago
25-6200
25 days ago
25-5911
25 days
39517 jvanwinden
author:jvanwinden
 feat(MeasureTheory/Function): ae convergence implies convergence in distribution This PR introduces a theorem which concludes convergence in distribution from almost everywhere convergence. Previously, this could be done by chaining [`tendstoInMeasure_of_tendsto_ae`](https://leanprover-community.github.io/mathlib4_docs/Mathlib/MeasureTheory/Function/ConvergenceInMeasure.html#MeasureTheory.tendstoInMeasure_of_tendsto_ae) and [`TendstoInMeasure.tendstoInDistribution`](https://leanprover-community.github.io/mathlib4_docs/Mathlib/MeasureTheory/Function/ConvergenceInDistribution.html#MeasureTheory.TendstoInMeasure.tendstoInDistribution). However, this is not a good way to to it since the second lemma requires a `SeminormedAddCommGroup E` instance (which is not needed for the statement to hold). Thus, we instead give a direct short proof which relies on dominated convergence. As a consequence, we also obtain a new proof of `TendstoInMeasure.tendstoInDistribution` which does not pass through `tendstoInDistribution_of_tendstoInMeasure_sub` and therefore does not require `SeminormedAddCommGroup` and `SecondCountableTopology` anymore. I expect this will enable significant golfing (or maybe even removal) of `tendstoInDistribution_of_tendstoInMeasure_sub` in the future. In order to allow for ae measurability as an assumption, it was necessary to add `tendsto_lintegral_filter_of_dominated_convergence'`, which gives dominated convergence along a countable filter for `AEMeasurable` functions. Sidenote: I believe [`TendstoInMeasure.tendstoInDistribution`](https://leanprover-community.github.io/mathlib4_docs/Mathlib/MeasureTheory/Function/ConvergenceInDistribution.html#MeasureTheory.TendstoInMeasure.tendstoInDistribution) should be rewritten at some point to require only a metric space (or maybe only uniform space) structure. However, even if this was done, the theorem of this PR provides the value of relying only on `TopologicalSpace E`. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-measure-probability awaiting-author 47/11 Mathlib/MeasureTheory/Function/ConvergenceInDistribution.lean,Mathlib/MeasureTheory/Integral/Lebesgue/DominatedConvergence.lean 2 11 ['CoolRmal', 'github-actions', 'jvanwinden'] EtienneC30
assignee:EtienneC30
0-26448
7 hours ago
1-6281
1 day ago
4-1595
4 days
35733 mkaratarakis
author:mkaratarakis
 feat: Algebraic setup and matrix coefficients for Gelfond-Schneider theorem This PR introduces the foundational algebraic setup and coefficient bounds required for the proof of the Gelfond-Schneider Theorem (Hilbert's Seventh Problem), which establishes that for algebraic numbers $\alpha \neq 0, 1$ and irrational algebraic $\beta$, the number $\alpha^\beta$ is transcendental. Following the contradiction argument presented in Loo-Keng Hua's "Introduction to Number Theory" (Chapter 17.9, 490 -493) Gelfond's Proof), this file constructs the common number field $K$ and sets up the scaled algebraic integers for the auxiliary linear system. This system will later be solved via Siegel's lemma (Lemma 8.2, 490, Hua). This PR is essentially the first half of page 490 in the book. The proof proceeds by assuming $\gamma = \alpha^\beta$ is algebraic, meaning $\alpha$, $\beta$, and $\gamma$ all lie in an algebraic field $K$ of degree $h$. 1. Bundles the common number field $K$, the complex embeddings, and the algebraic preimages $\alpha', \beta', \gamma'$, alongside the core hypotheses of the theorem. 2. Defines the field degree $h = [K : \mathbb{Q}]$, and bounds $m = 2h + 2$ and $n = q^2 / (2m)$ to control the dimensions of the linear system. 3. Defines $c_1$, a natural number chosen so that $c_1 \alpha$, $c_1 \beta$, and $c_1 \gamma$ are algebraic integers in $K$. We prove numerous bounding and integrality lemmas (`isIntegral_c₁α`, `isInt_β_bound`, etc.). 4. Formalizes the core algebraic coefficients $(a+b\beta)^k \alpha^{al} \gamma^{bl}$ which appear in the evaluation of the derivatives of the auxiliary function $R(x)$. 5. By scaling the system by $c_1^{n-1+2mq}$, we successfully restrict the entries of our linear system matrix `A` entirely to the ring of integers $\mathcal{O}_K$, preparing it for the application of Siegel's lemma. 6. House Bounds (`c₂`) : Establishes the foundational base integer $c_2$ to bound the absolute values of the conjugates (houses) of our coefficients. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-number-theory new-contributor 725/49 Mathlib.lean,Mathlib/NumberTheory/NumberField/House.lean,Mathlib/NumberTheory/Transcendental/GelfondSchneider/MainAlg.lean,Mathlib/RingTheory/Algebraic/NatDenominator.lean,Mathlib/RingTheory/IntegralClosure/Algebra/Basic.lean 5 22 ['MichaelStollBayreuth', 'github-actions', 'mkaratarakis', 'tb65536'] tb65536
assignee:tb65536
0-26304
7 hours ago
0-26371
7 hours ago
45-21914
45 days
35317 mkaratarakis
author:mkaratarakis
 feat: lemmas for the analytic part of the proof of the Gelfond–Schneider theorem (Part 5/5) If a function `R : ℂ → ℂ` factors as `R z = (z - z₀) ^ r * R₁ z`, where `R₁` is analytic everywhere, then for any `k ≤ r`, there exists an everywhere analytic function `R₂ : ℂ → ℂ` such that the `k`-th iterated derivative of `R` is given by `deriv^[k] R z = (z - z₀) ^ (r - k) * (r! / (r - k)! * R₁ z + (z - z₀) * R₂ z)`. This lemma is necessary for the proof of the Gelfond-Schneider theorem in subsequent PRs. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-number-theory new-contributor t-analysis 38/0 Mathlib/Analysis/Complex/CauchyIntegral.lean 1 26 ['MichaelStollBayreuth', 'github-actions', 'loefflerd', 'mkaratarakis'] loefflerd
assignee:loefflerd
0-26299
7 hours ago
0-26299
7 hours ago
26-29995
26 days
38026 mrdouglasny
author:mrdouglasny
 feat(Analysis/Calculus): define absolutely monotone functions ## Summary - Define `AbsolutelyMonotoneOn f s` for functions `f : ℝ → ℝ` that are smooth on `s` with all iterated derivatives within `s` nonneg - Prove closure under `add`, `smul`, `mul` - Show `exp`, `cosh`, constants, and powers are absolutely monotone on appropriate domains This is the first part of a split of #37879. Follow-up PRs will add: - Bernstein backward direction (nonneg coefficients → absolutely monotone) - Bernstein forward direction (absolutely monotone → analytic at 0) - Matrix applications (Schur product theorem for power series, entrywise exp) ## Test plan - [ ] CI passes (build + lint) - [ ] Verify `AbsolutelyMonotoneOn` structure and examples type-check 🤖 Generated with [Claude Code](https://claude.com/claude-code) Co-Authored-By: Claude Opus 4.6 (1M context) t-analysis new-contributor LLM-generated 132/0 Mathlib.lean,Mathlib/Analysis/Calculus/AbsolutelyMonotone.lean,docs/references.bib 3 35 ['ADedecker', 'github-actions', 'j-loreaux', 'mrdouglasny', 'sgouezel', 'vihdzp', 'wwylele'] sgouezel
assignee:sgouezel
0-26070
7 hours ago
0-26113
7 hours ago
25-21049
25 days
36814 YaelDillies
author:YaelDillies
 refactor(Combinatorics/SimpleGraph): no proof obligation in `rotate` If the walk doesn't go through the new vertex, return `nil` instead. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-combinatorics 46/32 Mathlib/Combinatorics/SimpleGraph/Acyclic.lean,Mathlib/Combinatorics/SimpleGraph/Connectivity/Connected.lean,Mathlib/Combinatorics/SimpleGraph/Connectivity/Subgraph.lean,Mathlib/Combinatorics/SimpleGraph/Hamiltonian.lean,Mathlib/Combinatorics/SimpleGraph/Matching.lean,Mathlib/Combinatorics/SimpleGraph/Paths.lean,Mathlib/Combinatorics/SimpleGraph/Walk/Decomp.lean,Mathlib/Combinatorics/SimpleGraph/Walk/Operations.lean 8 9 ['SnirBroshi', 'YaelDillies', 'b-mehta', 'eric-wieser', 'github-actions', 'mathlib-merge-conflicts'] nobody
0-25113
6 hours ago
0-24733
6 hours ago
62-37670
62 days
39710 justus-springer
author:justus-springer
 feat(AlgebraicGeometry/AffineSpace): affine space is smooth Show that affine space `𝔸(n; S)` is smooth over `S` (or relative dimension `Nat.card n`) . Also remove the `LocallyOfFinitePresentation` instance, as it can be inferred automatically from smoothness. - [ ] depends on: #39709 --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebraic-geometry large-import blocked-by-other-PR 85/18 Mathlib/AlgebraicGeometry/AffineSpace.lean,Mathlib/AlgebraicGeometry/Morphisms/Smooth.lean,Mathlib/RingTheory/Extension/Generators.lean,Mathlib/RingTheory/Extension/Presentation/Basic.lean,Mathlib/RingTheory/Extension/Presentation/Submersive.lean,Mathlib/RingTheory/Smooth/Basic.lean,Mathlib/RingTheory/Smooth/Quotient.lean,Mathlib/RingTheory/Smooth/StandardSmooth.lean 8 2 ['github-actions', 'mathlib-dependent-issues'] nobody
0-23555
6 hours ago
0-23556
6 hours ago
0-2625
43 minutes
39709 justus-springer
author:justus-springer
 feat(RingTheory/): `MvPolynomial` is standard smooth Add the trivial submersive presentation for `MvPolynomial` and show that `MvPolynomial` is standard smooth over its base ring. - [ ] depends on: #39708 --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-ring-theory blocked-by-other-PR 66/8 Mathlib/RingTheory/Extension/Generators.lean,Mathlib/RingTheory/Extension/Presentation/Basic.lean,Mathlib/RingTheory/Extension/Presentation/Submersive.lean,Mathlib/RingTheory/Smooth/Basic.lean,Mathlib/RingTheory/Smooth/Quotient.lean,Mathlib/RingTheory/Smooth/StandardSmooth.lean 6 2 ['github-actions', 'mathlib-dependent-issues'] nobody
0-23553
6 hours ago
0-23554
6 hours ago
0-2889
48 minutes
39708 justus-springer
author:justus-springer
 feat(RingTheory/Smooth/Basic): add `Generators.mvPolynomial` Define trivial `Generators` for `MvPolynomial` and use it to golf `FormallySmooth.mvPolynomial` (where they were previously defined inline). This also removes a `set_option backward.isDefEq.respectTransparency false`. - [ ] depends on: #39706 --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-ring-theory blocked-by-other-PR 19/8 Mathlib/RingTheory/Extension/Generators.lean,Mathlib/RingTheory/Smooth/Basic.lean,Mathlib/RingTheory/Smooth/Quotient.lean 3 2 ['github-actions', 'mathlib-dependent-issues'] nobody
0-23551
6 hours ago
0-23552
6 hours ago
0-3185
53 minutes
38424 SnirBroshi
author:SnirBroshi
 feat(Combinatorics/SimpleGraph/Coloring/VertexColoring): `chromaticNumber ⊤` and other small lemmas - Golf `isEmpty_of_colorable_zero` and rename to `Colorable.isEmpty` - `colorable_one_iff`: `G.Colorable 1 ↔ G = ⊥` - Combine `chromaticNumber_eq_zero_of_isEmpty`/`isEmpty_of_chromaticNumber_eq_zero` into `chromaticNumber_eq_zero_iff : G.chromaticNumber = 0 ↔ IsEmpty V` and deprecate the `→` side - `chromaticNumber_top_eq_enat_card`: `chromaticNumber ⊤ = ENat.card V` - Tag `chromaticNumber_top_eq_top_of_infinite`/`chromaticNumber_eq_zero_of_isEmpty` as `simp` - Golf `chromaticNumber_eq_one_iff` --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-combinatorics delegated 33/26 Mathlib/Combinatorics/SimpleGraph/Coloring/VertexColoring.lean 1 5 ['SnirBroshi', 'b-mehta', 'github-actions', 'mathlib-bors', 'vlad902'] nobody
0-23059
6 hours ago
0-23059
6 hours ago
28-78826
28 days
35316 mkaratarakis
author:mkaratarakis
 feat: lemmas for the analytic part of the proof of the Gelfond–Schneider theorem (Part 4/5) --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-number-theory new-contributor large-import 63/1 Mathlib/Analysis/Analytic/Order.lean 1 33 ['MichaelStollBayreuth', 'SnirBroshi', 'github-actions', 'kebekus', 'mathlib-dependent-issues', 'mkaratarakis'] MichaelStollBayreuth
assignee:MichaelStollBayreuth
0-22775
6 hours ago
0-22823
6 hours ago
35-3556
35 days
39713 vihdzp
author:vihdzp
 feat: values of `preAleph.symm` For a cardinal `c`, `preAleph.symm c` returns the ordinal index of `c`, within the well-order of cardinals. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-set-theory 23/2 Mathlib/SetTheory/Cardinal/Aleph.lean,Mathlib/SetTheory/Cardinal/Regular.lean 2 1 ['github-actions'] nobody
0-22281
6 hours ago
0-22373
6 hours ago
0-22084
6 hours
39689 kbuzzard
author:kbuzzard
 perf: increase prio of AddCommMonoid.toAddMonoid The idea is that to prove M is an additive monoid, then essentially always it's a good idea to try to prove that it's a commutative additive monoid. This is in stark contrast to multiplication, which is often not commutative. This change will not make failures any slower, but it might make successes faster. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra WIP
label:t-algebra$
 7/3 Mathlib/Algebra/Group/Defs.lean,Mathlib/Data/ENNReal/Basic.lean,Mathlib/Data/Matrix/Basic.lean,Mathlib/RingTheory/Polynomial/IsIntegral.lean 4 11 ['github-actions', 'kbuzzard', 'leanprover-radar', 'mattrobball'] nobody
0-22199
6 hours ago
0-22199
6 hours ago
0-22163
6 hours
39693 yuanyi-350
author:yuanyi-350
 feat(Combinatorics/Enumerative/Bell): sum over partition shapes Kill TODO in `Mathlib/Combinatorics/Enumerative/Bell.lean` which proves `Nat.bell` as a sum of `Multiset.bell` over partition shapes --- Migrated from #37690 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-combinatorics 118/25 Mathlib/Combinatorics/Enumerative/Bell.lean 1 3 ['YaelDillies', 'github-actions'] nobody
0-22171
6 hours ago
0-39824
10 hours ago
0-39630
11 hours
39138 Thmoas-Guan
author:Thmoas-Guan
 refactor(Algebra/GeometricallyReduced): refactor `Algebra.IsGeometricallyReduced` Refactor `Algebra.IsGeometricallyReduced` to adapt to a general algebra over commutative ring. In the up-coming #39141, we prove that this definition makes the base change to any field reduced. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-ring-theory maintainer-merge 47/16 Mathlib/RingTheory/LocalRing/ResidueField/Ideal.lean,Mathlib/RingTheory/Nilpotent/GeometricallyReduced.lean 2 11 ['Thmoas-Guan', 'chrisflav', 'github-actions'] nobody
0-21518
5 hours ago
1-27795
1 day ago
12-10321
12 days
39196 tb65536
author:tb65536
 feat(RingTheory/LocalRing/ResidueField/Fiber): the localization of `Ideal.Fiber` is a quotient This PR proves that the localization of `Ideal.Fiber` is a quotient. This will be applied in #39189 to prove the ramification-inertia formula for finite flat extensions. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-ring-theory t-algebra
label:t-algebra$
 48/0 Mathlib/RingTheory/LocalRing/ResidueField/Fiber.lean 1 1 ['github-actions'] nobody
0-21095
5 hours ago
11-27101
11 days ago
11-26814
11 days
39698 RaggedR
author:RaggedR
 feat(Archive): Meinhold family — five Sabidussi coset graphs of G₂(2) Five coset graphs of the exceptional Chevalley group G₂(2), each arising as Sab(G₂(2), K, D) for intermediate subgroups C₃ ≤ K ≤ G₂(2). The Clayworth graph (4032 vertices, cubic, genus 505) is the base case K = C₃. Meinhold-72 has 72 vertices, is 7-regular with girth 4, via K = PSL(3,2). Meinhold-504 has 504 vertices, is 24-regular with girth 4, via S₄. Meinhold-576 has 576 vertices, is 7-regular with girth 6, via C₇:C₃. Meinhold-1344 has 1344 vertices, is 9-regular with girth 6, via C₃×C₃. Meinhold-2016 has 2016 vertices, is 6-regular with girth 8, via C₆. Each graph has a Sabidussi isomorphism proving arc-transitivity, is connected, and has a shortest cycle witness establishing the girth. ![Meinhold-72](https://raw.githubusercontent.com/RaggedR/symmetric-graphs/main/lean/named_graphs/meinhold-72.jpeg) The Langer graph (63 vertices, 6-regular) is proved not to be a quotient of Clayworth: the three G₂(2)-invariant 63-block systems have quotient degrees 24, 32, 32, none of which equals 6. The Clayworth graph itself is proved to be a Sabidussi coset graph Sab(G₂(2), C₃, D) with two generators of orders 7 and 6 preserving adjacency, and BFS witness words establishing transitivity. The current approach is admittedly brute-force — the Clayworth graph is defined via a flat adjacency array and the quotient maps are verified by native_decide on concrete vertex data. A more algebraic treatment, deriving the Meinhold graphs directly from the coset lattice of G₂(2) without storing explicit adjacency data, would be cleaner and is planned as a follow-up. These graphs arise from my honours thesis on symmetric graph quotients (arXiv:1306.4798). The Meinhold family is named after Nick Meinhold, co-founder of Imagineering Melbourne. Depends on #39654 (CellularSurface instances, Clayworth graph). --- LLM tools were used to assist with Lean formalization. The mathematical content is the author's own work. t-combinatorics LLM-generated new-contributor 6884/0 Archive.lean,Archive/BolzaSurface.lean,Archive/ClayworthGraph.lean,Archive/ClayworthSurface.lean,Archive/HeawoodSurface.lean,Archive/KleinSurface.lean,Archive/LangerGraph.lean,Archive/Meinhold1344.lean,Archive/Meinhold2016.lean,Archive/Meinhold504.lean,Archive/Meinhold576.lean,Archive/MeinholdGraphs.lean,Archive/PrimitiveGraphs.lean,Archive/TriangleGroupSurface.lean,Archive/VoltageGraphs.lean,Archive/ZhouGraph.lean,Mathlib.lean,Mathlib/Combinatorics/CellularSurface.lean,Mathlib/Combinatorics/SimpleGraph/Action.lean,Mathlib/Combinatorics/SimpleGraph/CosetGraph.lean,Mathlib/Combinatorics/SimpleGraph/QuotientGraph.lean,Mathlib/Combinatorics/SimpleGraph/Representation.lean,Mathlib/Combinatorics/SimpleGraph/SabidussiWitness.lean,Mathlib/Combinatorics/SimpleGraph/Symmetric.lean 24 3 ['RaggedR', 'github-actions'] nobody
0-20901
5 hours ago
0-32124
8 hours ago
0-31835
8 hours
33832 alreadydone
author:alreadydone
 feat(Algebra): localization preserves unique factorization --- - [x] depends on: #33851 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra awaiting-author
label:t-algebra$
 143/12 Mathlib.lean,Mathlib/Algebra/BigOperators/Group/Finset/Basic.lean,Mathlib/Algebra/GroupWithZero/Associated.lean,Mathlib/GroupTheory/MonoidLocalization/Basic.lean,Mathlib/GroupTheory/MonoidLocalization/UniqueFactorization.lean,Mathlib/RingTheory/Localization/Defs.lean 6 13 ['Vierkantor', 'alreadydone', 'dagurtomas', 'github-actions', 'mathlib4-dependent-issues-bot', 'riccardobrasca'] Vierkantor
assignee:Vierkantor
0-20858
5 hours ago
106-16526
106 days ago
15-81158
15 days
39692 YaelDillies
author:YaelDillies
 chore(Algebra/Order/BigOperators): follow the `₀` naming convention We have long agreed that `MonoidWithZero` lemmas corresponding to `Monoid` lemmas should be suffixed with `₀`, while currently it is the `Monoid` lemmas that are primed. Also deprecate two primed lemmas that only differed from the unprimed versions in a minor way. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra t-order
label:t-algebra$
 283/219 Mathlib/Algebra/BigOperators/Finprod.lean,Mathlib/Algebra/Group/Submonoid/Pointwise.lean,Mathlib/Algebra/Order/BigOperators/Group/Finset.lean,Mathlib/Algebra/Order/BigOperators/Group/List.lean,Mathlib/Algebra/Order/BigOperators/Group/Multiset.lean,Mathlib/Algebra/Order/BigOperators/GroupWithZero/Finset.lean,Mathlib/Analysis/Analytic/Composition.lean,Mathlib/Analysis/Asymptotics/SpecificAsymptotics.lean,Mathlib/Analysis/BoxIntegral/DivergenceTheorem.lean,Mathlib/Analysis/Complex/Exponential.lean,Mathlib/Analysis/Complex/JensenFormula.lean,Mathlib/Analysis/InnerProductSpace/Orientation.lean,Mathlib/Analysis/InnerProductSpace/Subspace.lean,Mathlib/Analysis/Normed/Ring/Basic.lean,Mathlib/Analysis/Normed/Ring/InfiniteProd.lean,Mathlib/Analysis/ODE/DiscreteGronwall.lean,Mathlib/Analysis/Polynomial/MahlerMeasure.lean,Mathlib/Analysis/SpecialFunctions/Trigonometric/Chebyshev/Extremal.lean,Mathlib/Analysis/SpecificLimits/Basic.lean,Mathlib/MeasureTheory/Constructions/Pi.lean,Mathlib/MeasureTheory/Measure/HasOuterApproxClosedProd.lean,Mathlib/MeasureTheory/Measure/Lebesgue/Basic.lean,Mathlib/MeasureTheory/Measure/Lebesgue/VolumeOfBalls.lean,Mathlib/NumberTheory/Bertrand.lean,Mathlib/NumberTheory/Height/Basic.lean,Mathlib/NumberTheory/Height/MvPolynomial.lean,Mathlib/NumberTheory/NumberField/InfinitePlace/Basic.lean,Mathlib/NumberTheory/Primorial.lean,Mathlib/NumberTheory/SelbergSieve.lean,Mathlib/NumberTheory/SiegelsLemma.lean,Mathlib/NumberTheory/SmoothNumbers.lean,Mathlib/Probability/ProductMeasure.lean,Mathlib/RingTheory/Polynomial/Cyclotomic/Eval.lean,Mathlib/Topology/Algebra/InfiniteSum/ENNReal.lean,Mathlib/Topology/Algebra/InfiniteSum/Order.lean 35 3 ['github-actions', 'vihdzp'] nobody
0-20768
5 hours ago
0-43211
11 hours ago
0-42922
11 hours
39649 RaggedR
author:RaggedR
 feat(Archive): Langer graph, Tutte 12-cage, and structural equality via G₂(2) This adds three constructions from the theory of generalized polygons over finite fields to Archive/, and proves they give the same graph using the Sabidussi representation theorem from #39548 and #39550. The Langer graph (63 vertices, 6-regular) is the collinearity graph of the split Cayley hexagon GH(2,2). It has three independent definitions: algebraically via the Zorn product on Q(6,2) (`langerSimpleGraph`), geometrically as the distance-2 graph of the Tutte 12-cage restricted to points (`tutte12Distance2Graph`), and group-theoretically as the coset graph Sab(G₂(2), H₁₉₂, D) where H₁₉₂ is the point stabiliser of order 192 (`langerCosetGraph`). The main result `langer_iso_tutte12_distance2` proves the algebraic and geometric definitions are isomorphic by composing two Sabidussi isos through a common coset graph. Both graphs are G₂(2)-invariant and arc-transitive, so `sabidussiIso` maps each to Sab(G₂(2), Stab(0), D). Since they have the same 6 neighbors at vertex 0, their connection sets are equal (`dist2_connectionSet_eq`), so both map to the same coset graph. The proof is `langerSabidussiIso.trans dist2SabidussiIso.symm`. ![Langer graph](https://raw.githubusercontent.com/RaggedR/symmetric-graphs/main/lean/named_graphs/langer-63v.jpg) ![Tutte 12-cage](https://raw.githubusercontent.com/RaggedR/symmetric-graphs/main/lean/named_graphs/tutte-12cage.jpg) Also included: the Tutte 12-cage (126 vertices, semisymmetric because GH(2,2) has no polarity over F₂), and self-orthogonality of the Q(6,2) parity-check matrix. Generator data was produced by `compute_g2_generators.py` in the source repo at RaggedR/symmetric-graphs. Depends on #39548 (coset graphs), #39550 (Sabidussi representation), #39551 (quotient graphs). The `sabidussiIso`, `connectionSet`, and `GraphAction` from those PRs are load-bearing in the equivalence proof. --- LLM tools were used to assist with Lean formalization. The mathematical content is the author's own work. t-combinatorics new-contributor LLM-generated 1576/0 Archive.lean,Archive/LangerGraph.lean,Mathlib.lean,Mathlib/Combinatorics/SimpleGraph/Action.lean,Mathlib/Combinatorics/SimpleGraph/CosetGraph.lean,Mathlib/Combinatorics/SimpleGraph/QuotientGraph.lean,Mathlib/Combinatorics/SimpleGraph/Representation.lean,Mathlib/Combinatorics/SimpleGraph/Symmetric.lean 8 7 ['RaggedR', 'github-actions', 'wwylele'] nobody
0-20730
5 hours ago
0-49225
13 hours ago
1-10770
1 day
39650 RaggedR
author:RaggedR
 feat(Archive): dodecahedron, Petersen graph, 3-cube, and antipodal quotients This defines the dodecahedron graph (Fin 20, 3-regular, 30 edges), the Petersen graph (Fin 10, as the antipodal quotient of the dodecahedron), and the 3-cube Q₃ (Fin 8, 3-regular, 12 edges) with its antipodal quotient proved equal to K₄. The Petersen graph is defined as `dodecahedronGraph.quotientGraph dodecAntipodalMap`, using the quotient graph infrastructure from #39551. The antipodal involution on the dodecahedron identifies each vertex with the vertex at distance 5 (diametrically opposite). The 3-cube's antipodal involution (bitwise complement) quotients to K₄ = ⊤. ![Dodecahedron → Petersen quotient](https://raw.githubusercontent.com/RaggedR/symmetric-graphs/main/lean/named_graphs/dodecahedron-quotient-petersen.jpeg) ![Cube → K₄ quotient](https://raw.githubusercontent.com/RaggedR/symmetric-graphs/main/lean/named_graphs/cube-quotient-k4.jpeg) The graph definitions and quotient constructions follow Langer, arXiv:1306.4798. Depends on #39551 (quotient graphs and Lorimer's theorem). --- LLM tools were used to assist with Lean formalization. The mathematical content is the author's own work. t-combinatorics new-contributor LLM-generated 1097/0 Archive.lean,Archive/NamedGraphs.lean,Mathlib.lean,Mathlib/Combinatorics/SimpleGraph/Action.lean,Mathlib/Combinatorics/SimpleGraph/CosetGraph.lean,Mathlib/Combinatorics/SimpleGraph/QuotientGraph.lean,Mathlib/Combinatorics/SimpleGraph/Representation.lean,Mathlib/Combinatorics/SimpleGraph/Symmetric.lean 8 7 ['RaggedR', 'github-actions', 'vihdzp'] nobody
0-20727
5 hours ago
0-80440
22 hours ago
1-34316
1 day
39651 RaggedR
author:RaggedR
 feat(Archive): voltage graphs on K₂, Heawood and Möbius-Kantor graphs This defines `voltageGraphK2`, a cubic covering construction on K₂ with cyclic voltage group `ZMod m`. Vertices are `Fin 2 × ZMod m`, with edges `(0, g) ~ (1, g + vⱼ)` for three voltages. Two instances are provided. The Heawood graph (F014A) is `voltageGraphK2 7 0 4 6`, the Levi graph of the Fano plane PG(2,2): 14 vertices, cubic, girth 6, equal to Sab(G₄₂, C₃) where G₄₂ = Z₇ ⋊ Z₆. The Möbius-Kantor graph (F016A) is `voltageGraphK2 8 0 1 3`, the generalised Petersen graph GP(8,3): 16 vertices, cubic, girth 6, equal to Sab(GL(2,3), C₃). Both quotient to K₂ under the fibre projection `Prod.fst`, recovering the base graph. ![Heawood graph](https://raw.githubusercontent.com/RaggedR/symmetric-graphs/main/lean/named_graphs/heawood-F014A.jpg) ![Möbius-Kantor graph](https://raw.githubusercontent.com/RaggedR/symmetric-graphs/main/lean/named_graphs/mobius-kantor-F016A.jpg) The voltage graph construction and named graph instances follow Langer, arXiv:1306.4798, and Gross & Tucker, *Topological Graph Theory*. Depends on #39551 (quotient graphs and Lorimer's theorem). --- LLM tools were used to assist with Lean formalization. The mathematical content is the author's own work. t-combinatorics new-contributor LLM-generated 1113/0 Archive.lean,Archive/VoltageGraphs.lean,Mathlib.lean,Mathlib/Combinatorics/SimpleGraph/Action.lean,Mathlib/Combinatorics/SimpleGraph/CosetGraph.lean,Mathlib/Combinatorics/SimpleGraph/QuotientGraph.lean,Mathlib/Combinatorics/SimpleGraph/Representation.lean,Mathlib/Combinatorics/SimpleGraph/Symmetric.lean 8 5 ['RaggedR', 'github-actions'] nobody
0-20724
5 hours ago
0-44160
12 hours ago
1-3244
1 day
33506 Rida-Hamadani
author:Rida-Hamadani
 feat(SimpleGraph): construct a cycle of two distinct paths with same start and end Co-authored-by: Vlad Tsyrklevich Co-authored-by: Snir Broshi <26556598+SnirBroshi@users.noreply.github.com> --- - [x] depends on: #33249 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-combinatorics maintainer-merge 114/5 Mathlib/Combinatorics/SimpleGraph/Paths.lean,Mathlib/Combinatorics/SimpleGraph/Walk/Basic.lean,Mathlib/Combinatorics/SimpleGraph/Walk/Decomp.lean,Mathlib/Data/List/Basic.lean,Mathlib/Data/List/Nodup.lean 5 62 ['Rida-Hamadani', 'SnirBroshi', 'YaelDillies', 'github-actions', 'mathlib-dependent-issues', 'mathlib-merge-conflicts', 'mathlib4-merge-conflict-bot', 'vlad902'] nobody
0-20592
5 hours ago
0-54765
15 hours ago
31-35733
31 days
39274 ADedecker
author:ADedecker
 WIP: Fredholm operators --- - [ ] depends on: #39468 - [ ] depends on: #39475 - [ ] depends on: #39100 - [ ] depends on: #39525 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) blocked-by-other-PR merge-conflict 1510/1 Mathlib.lean,Mathlib/Analysis/Normed/Operator/Perturbation/StrictByFinite.lean,Mathlib/Topology/Algebra/Module/FredholmOperators.lean,Mathlib/Topology/Algebra/Module/LinearMap.lean 4 3 ['github-actions', 'mathlib-dependent-issues', 'mathlib-merge-conflicts'] nobody
0-20356
5 hours ago
unknown
0-0
0 seconds
39714 tb65536
author:tb65536
 feat(RingTheory/Localization/AtPrime/Basic): add variants of `localAlgHom` and `localAlgEquiv` This PR adds variants of `localAlgHom` and `localAlgEquiv` where the base ring is also localized. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-ring-theory t-algebra
label:t-algebra$
 45/5 Mathlib/RingTheory/Localization/AtPrime/Basic.lean 1 1 ['github-actions'] nobody
0-20331
5 hours ago
0-20331
5 hours ago
0-20044
5 hours
39711 robin-carlier
author:robin-carlier
 test: specify univ vars in Cat The current return type of `Cat` is `Type max (u + 1) u (v + 1)`, let’s see if forcing it to be `Type max _ _` helps. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-category-theory 1/1 Mathlib/CategoryTheory/Category/Cat.lean 1 5 ['github-actions', 'leanprover-radar', 'robin-carlier'] nobody
0-19817
5 hours ago
unknown
0-0
0 seconds
38754 EtienneC30
author:EtienneC30
 feat: integral of a continuous bilinear map applied to independent random variables If `X` and `Y` are independent then `∫ ω, X ω * Y ω ∂μ = ∫ ω, X ω ∂μ * ∫ ω, Y ω ∂μ`. We generalize this to the case of a general continuous bilinear map, and specialize it for scalar multiplication and multiplication. --- - [x] depends on: #39644 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-measure-probability 263/77 Mathlib/MeasureTheory/Integral/Prod.lean,Mathlib/Probability/Independence/Integration.lean 2 10 ['EtienneC30', 'github-actions', 'mathlib-dependent-issues', 'sgouezel'] sgouezel
assignee:sgouezel
0-19804
5 hours ago
0-19823
5 hours ago
13-16495
13 days
39670 VictorBoscaro
author:VictorBoscaro
 feat(CategoryTheory/Limits/Shapes): add WalkingArrow category ## Summary Adds `CategoryTheory.Limits.WalkingArrow`, the small category with two objects `zero`/`one` and a single non-identity morphism `arrow : zero ⟶ one`, at `Mathlib/CategoryTheory/Limits/Shapes/WalkingArrow.lean`. The `SmallCategory` instance is provided via an explicit `WalkingArrowHom` type family mirroring the design of `WalkingParallelPairHom` in `Equalizers.lean`. Functors `WalkingArrow ⥤ C` correspond to the data of a single morphism in `C`, i.e. to objects of the arrow category `Arrow C` (`Mathlib.CategoryTheory.Comma.Arrow`); the equivalence of categories is deferred to a follow-up PR. ## Mathematical context `WalkingArrow` is the freely generated category on a single non-identity morphism. It complements the existing small-fixture family — `WalkingPair` (two objects, no non-identity morphisms), `WalkingParallelPair` (two parallel non-identity morphisms), `WalkingCospan`, `WalkingSpan` — by providing the smallest non-discrete member: a single object-to-object arrow. The object names `zero`/`one` and the constructor naming style follow the `WalkingParallelPair` convention already in `Equalizers.lean`. ## Where this could be used - **`diagramIsoArrow` shape-rewriting**: Mirrors `diagramIsoParallelPair` (`Mathlib.CategoryTheory.Limits.Shapes.Equalizers`, line 251). A `diagramIsoArrow` would canonically rewrite any `WalkingArrow ⥤ C` to `Arrow.mk`-form, enabling `hasLimit_of_iso`/`hasColimit_of_iso` for arrow-shaped diagrams in the same style as the equalizer case. - **Functorial factorization**: `FunctorialFactorizationData` (`Mathlib.CategoryTheory.MorphismProperty.Factorization`) stores a functor `Arrow C ⥤ C` together with natural transformations from/to `Arrow.leftFunc` and `Arrow.rightFunc`. The pending `(WalkingArrow ⥤ C) ≌ Arrow C` would let those natural transformations be expressed as evaluations at `zero`/`one`, simplifying transport lemmas for weak factorization systems. - **Small-object functor extensionality**: `Arrow.functor_ext` (`Mathlib.CategoryTheory.Comma.Arrow`, line 421) is invoked multiple times in the small-object iteration proofs (`Mathlib.CategoryTheory.SmallObject.Iteration.Basic`). With `WalkingArrow`, the same extensionality principle can be stated shape-theoretically as agreement on the image of `WalkingArrowHom.arrow`, giving a uniform pattern across the `Walking*` family. - **`ComposableArrows C 1` ≃ `Arrow C` unification**: `ComposableArrows.arrowEquiv` (`Mathlib.CategoryTheory.ComposableArrows.Basic`, line 312) establishes `ComposableArrows C 1 ≃ Arrow C` at the type level; `ComposableArrows C 1` is `Fin 2 ⥤ C`. A future `WalkingArrow ≌ Fin 2` instance would make the categorical equivalence `(WalkingArrow ⥤ C) ≌ Arrow C` its canonical lifting, unifying the three presentations of a single morphism. ## Notes - Naming follows the `Walking*` convention: `WalkingArrow` (type, `UpperCamelCase`), `WalkingArrowHom` (morphism family), `walkingArrowHomCategory` (instance, `lowerCamelCase`), `walkingArrowHom_id` (theorem, `snake_case`). - `set_option genSizeOfSpec false` applied to `WalkingArrowHom` to suppress the spurious `sizeOf_spec` lemma that triggers the `simpNF` linter on indexed inductives (same pattern as `WalkingParallelPairHom`). - API is minimal — `WalkingArrow ≌ Fin 2`, the opposite functor, and the Arrow-C equivalence are left to follow-up PRs so that this PR is reviewable in one pass. - No `@[simp]` lemmas for `comp` cases beyond `walkingArrowHom_id` and `walkingArrowHom_comp_arrow_id`; pattern is asymmetric (the `arrow` constructor has no further composition). Happy to add if preferred. t-category-theory new-contributor 116/0 Mathlib.lean,Mathlib/CategoryTheory/Limits/Shapes/WalkingArrow.lean 2 2 ['github-actions'] nobody
0-19406
5 hours ago
0-19468
5 hours ago
0-19594
5 hours
39548 RaggedR
author:RaggedR
 feat(Combinatorics/SimpleGraph): coset graphs (Sabidussi construction) This adds coset graphs (Sabidussi's construction) to Mathlib, building on the graph action infrastructure from #39530. Given a group `G`, a subgroup `H`, and a connection set `D` (a union of `(H,H)`-double cosets, closed under inversion, disjoint from `H`), the coset graph `Sab(G, H, D)` is the simple graph on `G ⧸ H` where `xH` is adjacent to `yH` whenever `x⁻¹y ∈ D`. The well-definedness proof — that adjacency is independent of coset representatives — uses the double coset stability of `D`. This is the core algebraic content of the construction. The file then shows that left multiplication by `G` preserves adjacency (`graphAction` instance) and that coset graphs are vertex-transitive. When `H ≤ K`, the natural projection `G ⧸ H → G ⧸ K` is a graph homomorphism for coset graphs sharing the same connection set `D`. The proof of `proj_adj` is trivial — adjacency is `x⁻¹y ∈ D` in both graphs, independent of the subgroup. This is the Sabidussi analogue of quotient by a block system: the orbits of `K` on `G ⧸ H` form blocks of size `[K : H]`, and the quotient graph is `Sab(G, K, D)`. For example, the Zhou graph (F182A, Sab(PSL(2,13), S₃), 182 vertices, cubic) projects to the Zhou-6 graph (Sab(PSL(2,13), D₁₂), 91 vertices, 6-regular) via S₃ ≤ D₁₂, and the dodecahedron (Sab(A₅, C₃)) projects to the Petersen graph (Sab(A₅, D₆)) via C₃ ≤ D₆. Sabidussi's construction generalizes Cayley graphs (which are the special case `H = ⊥`). Together with the representation theorem (a future PR), it gives a complete classification: every vertex-transitive graph is isomorphic to a coset graph. The definitions and proofs are from my honours thesis (*Symmetric Graphs and their Quotients*, arXiv:1306.4798). Depends on #39530. --- LLM tools were used to assist with Lean formalization. The mathematical content is the author's own work. t-combinatorics new-contributor LLM-generated 304/0 Mathlib.lean,Mathlib/Combinatorics/SimpleGraph/Action.lean,Mathlib/Combinatorics/SimpleGraph/CosetGraph.lean 3 4 ['RaggedR', 'github-actions'] nobody
0-19311
5 hours ago
1-19282
1 day ago
4-5984
4 days
39550 RaggedR
author:RaggedR
 feat(Combinatorics/SimpleGraph): Sabidussi representation theorem This proves Sabidussi's representation theorem: if a group G acts transitively on the vertices of a graph Γ while preserving adjacency, then Γ is isomorphic to the coset graph `Sab(G, Gᵥ, D)` where `Gᵥ` is the stabilizer of a basepoint and `D = {g ∈ G : Γ.Adj v (g • v)}` is the connection set. For arc-transitive (symmetric) graphs, the connection set D is a single double coset HaH, giving the classical Sabidussi coset graph Sab(G, H, HaH). For merely vertex-transitive graphs, D may be a union of several double cosets. The connection set D is shown to satisfy the IsConnectionSet axioms for the stabilizer subgroup: it is stable under left and right multiplication by stabilizer elements (since the stabilizer fixes v and the action preserves adjacency), closed under inversion (since the graph is undirected), and disjoint from the stabilizer (since the graph has no loops). The orbit-stabilizer equivalence V ≃ G ⧸ Gᵥ is then shown to preserve adjacency in both directions, completing the isomorphism. The definitions and proofs are from my honours thesis (*Symmetric Graphs and their Quotients*, arXiv:1306.4798). Depends on #39548. --- LLM tools were used to assist with Lean formalization. The mathematical content is the author's own work. t-combinatorics new-contributor LLM-generated 423/0 Mathlib.lean,Mathlib/Combinatorics/SimpleGraph/Action.lean,Mathlib/Combinatorics/SimpleGraph/CosetGraph.lean,Mathlib/Combinatorics/SimpleGraph/Representation.lean 4 4 ['RaggedR', 'github-actions'] nobody
0-19309
5 hours ago
1-19284
1 day ago
4-5122
4 days
39551 RaggedR
author:RaggedR
 feat(Combinatorics/SimpleGraph): Lorimer's theorem and quotient graphs This completes the algebraic theory of symmetric graphs by proving Lorimer's theorem (both directions) and the Lorimer quotient theorem, building on the Sabidussi representation theorem from #39550. Lorimer's theorem characterizes symmetric (arc-transitive) graphs in terms of coset graphs. The forward direction shows that Sab(G, H, HaH) is arc-transitive whenever a is an involution not in H. The proof establishes local transitivity at the identity coset by exploiting the double coset decomposition of neighbors, then transports it to all vertices by conjugation. The reverse direction shows that every arc-transitive graph's connection set is a single double coset GᵥaGᵥ, where a is the element swapping an arc (v, w). This a satisfies a ∉ Gᵥ and a² ∈ Gᵥ. The quotient theorem shows that the quotient of Sab(G, H, D) by an overgroup K ≥ H (with D ∩ K = ∅) is isomorphic to Sab(G, K, KDK) where KDK is the expanded connection set. The isomorphism is witnessed by Equiv.refl — the quotient graph and the coset graph with expanded connection set are the same graph up to the identity map on G ⧸ K. Together with #39530, #39548, and #39550, this gives a complete formalization of Chapters 1–2 of arXiv:1306.4798. Depends on #39550. --- LLM tools were used to assist with Lean formalization. The mathematical content is the author's own work. t-combinatorics new-contributor LLM-generated 755/0 Mathlib.lean,Mathlib/Combinatorics/SimpleGraph/Action.lean,Mathlib/Combinatorics/SimpleGraph/CosetGraph.lean,Mathlib/Combinatorics/SimpleGraph/QuotientGraph.lean,Mathlib/Combinatorics/SimpleGraph/Representation.lean,Mathlib/Combinatorics/SimpleGraph/Symmetric.lean 6 4 ['RaggedR', 'github-actions'] nobody
0-19306
5 hours ago
1-19284
1 day ago
4-4376
4 days
39654 RaggedR
author:RaggedR
 feat(Archive): CellularSurface instances (genus 1, 2, 3, 505) This PR provides concrete CellularSurface instances for the four CSS surface codes: Heawood (genus 1), Bolza (genus 2), Klein quartic (genus 3), and Clayworth (genus 505). Each surface embeds a cubic arc-transitive graph arising from a Sabidussi coset construction, and the chain complex d1, d2 satisfies the boundary condition d1 · d2 = 0 that gives the CSS orthogonality. Together with #39653, which proves that k = 2g for any surface tiling, these instances yield formally verified CSS codes with parameters [[21, 2]], [[24, 4]], [[84, 6]], and [[6048, 1010]] respectively. The Heawood and Bolza surfaces are small enough that all axioms are verified by decide. Both include bridge theorems proving the CellularSurface graph matches the corresponding voltage graph on K₂ from VoltageGraphs.lean. The Klein quartic embeds the Klein graph (56 vertices) from the triangle group Δ(2,3,7) acting on PSL(2,7), with a Sabidussi proof. The Clayworth surface is the interesting case: 4032 vertices, 6048 edges, 1008 dodecagonal faces, genus 505. Rather than storing tens of thousands of array entries, the construction works algebraically from the regular representation of G₂(2) on 12096 darts, using a general TriangleGroupSurface module that derives a CellularSurface from any finite quotient of Δ(2,3,r). The key identity is that T = RS implies the far endpoint of each dart has the same vertex as its R-successor, because S preserves vertex cosets. There are five sorrys. Four are dual graph regularity theorems (Heawood 6-regular, Bolza 8-regular, Klein 7-regular, Clayworth 12-regular), all of which should be closable by native_decide. The fifth is the Clayworth Sabidussi isomorphism, where the individual native_decide checks all pass but the kernel struggles to assemble the SabidussiWitness structure for 4032 vertices. These are left for a follow-up. ![Klein graph](https://raw.githubusercontent.com/RaggedR/symmetric-graphs/main/lean/named_graphs/klein-F056A.jpg) ![Zhou-3 graph](https://raw.githubusercontent.com/RaggedR/symmetric-graphs/main/lean/named_graphs/zhou3-F182A.jpg) ![Zhou-6 graph](https://raw.githubusercontent.com/RaggedR/symmetric-graphs/main/lean/named_graphs/zhou6-91v.jpg) Depends on #39653 (CellularSurface, k = 2g). Cross-references #39649 (Langer/G₂(2) ecosystem), #39651 (voltage graphs). t-combinatorics new-contributor LLM-generated 2390/0 Archive.lean,Archive/BolzaSurface.lean,Archive/ClayworthSurface.lean,Archive/HeawoodSurface.lean,Archive/KleinSurface.lean,Archive/TriangleGroupSurface.lean,Archive/VoltageGraphs.lean,Mathlib.lean,Mathlib/Combinatorics/CellularSurface.lean,Mathlib/Combinatorics/SimpleGraph/Action.lean,Mathlib/Combinatorics/SimpleGraph/CosetGraph.lean,Mathlib/Combinatorics/SimpleGraph/QuotientGraph.lean,Mathlib/Combinatorics/SimpleGraph/Representation.lean,Mathlib/Combinatorics/SimpleGraph/SabidussiWitness.lean,Mathlib/Combinatorics/SimpleGraph/Symmetric.lean 15 8 ['RaggedR', 'github-actions'] nobody
0-19289
5 hours ago
0-18493
5 hours ago
0-57608
16 hours
39695 RaggedR
author:RaggedR
 feat(Archive): Zhou-3 arc-transitivity and Lorimer quotient to Zhou-6 The Zhou-3 graph (Foster census F182A, 182 vertices, cubic) has an imprimitive block system of 91 blocks of size 2. This PR proves the block system is invariant under the full PSL(2,13) action via closure induction on the generators, with a pigeonhole argument for the inverse case. The setwise stabilizer of the block containing vertex 0 is D₁₂ (dihedral of order 12), which contains the point stabilizer S₃ at index 2. With the block structure established, Lorimer's quotient theorem (from #39551) is instantiated for the first time on a concrete graph: the quotient of Sab(PSL(2,13), S₃, D) by D₁₂ is isomorphic to Sab(PSL(2,13), D₁₂, D₁₂·D·D₁₂). The two hypotheses — H ≤ K and D ∩ K = ∅ — are verified, the first using the closure block invariance theorem and the second by observing that any element of K maps vertex 0 into {0, 137}, but neither is a neighbor of 0. Arc-transitivity of Zhou-3 is proved via Lorimer's forward theorem: the connection set is a single double coset S₃·a·S₃ where a is an explicit involution (a word of length 9 in the generators) that swaps vertex 0 with its neighbor 3. ![Zhou-3 graph](https://raw.githubusercontent.com/RaggedR/symmetric-graphs/main/lean/named_graphs/zhou3-F182A.jpg) ![Zhou-6 graph](https://raw.githubusercontent.com/RaggedR/symmetric-graphs/main/lean/named_graphs/zhou6-91v.jpg) This depends on the Sabidussi/Lorimer chain (#39530, #39548, #39550, #39551) and on #39654 for the Zhou-3 Sabidussi representation and SabidussiWitness infrastructure. t-combinatorics new-contributor LLM-generated 8575/0 Archive.lean,Archive/BolzaSurface.lean,Archive/ClayworthSabidussi.lean,Archive/ClayworthSurface.lean,Archive/HeawoodSurface.lean,Archive/KleinSurface.lean,Archive/VoltageGraphs.lean,Archive/ZhouGraph.lean,Mathlib.lean,Mathlib/Combinatorics/CellularSurface.lean,Mathlib/Combinatorics/SimpleGraph/Action.lean,Mathlib/Combinatorics/SimpleGraph/CosetGraph.lean,Mathlib/Combinatorics/SimpleGraph/QuotientGraph.lean,Mathlib/Combinatorics/SimpleGraph/Representation.lean,Mathlib/Combinatorics/SimpleGraph/SabidussiWitness.lean,Mathlib/Combinatorics/SimpleGraph/Symmetric.lean 16 2 ['github-actions'] nobody
0-19286
5 hours ago
0-27359
7 hours ago
0-2819
46 minutes
37259 EtienneC30
author:EtienneC30
 feat: blumenthal's zero-one law for Brownian motion --- - [ ] depends on: #36616 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) brownian t-measure-probability blocked-by-other-PR large-import 989/84 Mathlib.lean,Mathlib/MeasureTheory/Function/L2Space.lean,Mathlib/MeasureTheory/Integral/Prod.lean,Mathlib/MeasureTheory/MeasurableSpace/Basic.lean,Mathlib/MeasureTheory/MeasurableSpace/Constructions.lean,Mathlib/MeasureTheory/MeasurableSpace/MeasurablyGenerated.lean,Mathlib/Probability/BrownianMotion/Basic.lean,Mathlib/Probability/BrownianMotion/GaussianProjectiveFamily.lean,Mathlib/Probability/Distributions/Gaussian/HasGaussianLaw/Basic.lean,Mathlib/Probability/Distributions/Gaussian/Real.lean,Mathlib/Probability/HasLaw.lean,Mathlib/Probability/Independence/Basic.lean,Mathlib/Probability/Independence/Integration.lean,Mathlib/Probability/Independence/Kernel/Indep.lean,Mathlib/Probability/Independence/Kernel/IndepFun.lean,Mathlib/Probability/Independence/ZeroOne.lean,Mathlib/Probability/Moments/Basic.lean,Mathlib/Probability/Process/Filtration.lean 18 3 ['github-actions', 'mathlib-dependent-issues', 'mathlib-merge-conflicts'] nobody
0-19249
5 hours ago
unknown
0-0
0 seconds
39716 tb65536
author:tb65536
 feat(RingTheory/LocalRing/ResidueField/Basic): add algebra homs between residue fields This PR adds algebra homs between residue fields. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-ring-theory t-algebra
label:t-algebra$
 62/0 Mathlib/RingTheory/LocalRing/ResidueField/Basic.lean 1 1 ['github-actions'] nobody
0-19165
5 hours ago
0-19165
5 hours ago
0-18876
5 hours
39652 sgouezel
author:sgouezel
 chore: cleanup Integral file --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-measure-probability delegated 85/143 Mathlib/MeasureTheory/Integral/Bochner/Basic.lean,Mathlib/MeasureTheory/Integral/DominatedConvergence.lean,Mathlib/MeasureTheory/Integral/Prod.lean,Mathlib/Probability/Kernel/Composition/IntegralCompProd.lean,Mathlib/Probability/Kernel/Disintegration/Density.lean 5 6 ['ADedecker', 'RaggedR', 'github-actions', 'mathlib-bors', 'sgouezel'] nobody
0-19032
5 hours ago
0-19475
5 hours ago
1-20112
1 day
39718 RaggedR
author:RaggedR
 feat(Archive): dual Langer graph and GH(2,2) non-self-duality This PR introduces the dual Langer graph, the line-collinearity graph of the split Cayley hexagon GH(2,2), and establishes the algebraic infrastructure for proving that it is not isomorphic to the Langer graph (the point-collinearity graph). Both graphs share the intersection array {6, 4, 4; 1, 1, 3} but are distinguished by the connectivity of their distance-3 subgraphs. The key mathematical contribution is deriving the G₂(2) line-action from the point-action (already in Archive.LangerGraph) via the triangle-line bijection. Each line of GH(2,2) corresponds to a unique triangle in the Langer graph, and the point-action sends triangles to triangles, inducing an action on lines. The induced line-action preserves the share-a-vertex relation, which is proved algebraically using Finset.image_inter (injective maps commute with intersection) and Finset.image_nonempty (images preserve non-emptiness). The equivariance of each generator is a 63-case native_decide verification, after which the word-level preservation follows by structural induction with no further computation. Two sorries remain. The bridge theorem connecting dual Langer adjacency to the share-vertex relation is a native_decide that needs tuning for the kernel recursion limit. The non-isomorphism theorem, which uses d₃-subgraph connectivity as a distinguishing invariant transported to all vertices via the line-action, depends on this bridge. These will be closed in a follow-up once the computational proofs are optimized. This PR depends on Archive.LangerGraph. t-combinatorics new-contributor 7203/0 Archive.lean,Archive/BolzaSurface.lean,Archive/ClayworthGraph.lean,Archive/ClayworthSurface.lean,Archive/DualLangerGraph.lean,Archive/HeawoodSurface.lean,Archive/KleinSurface.lean,Archive/LangerGraph.lean,Archive/Meinhold1344.lean,Archive/Meinhold2016.lean,Archive/Meinhold504.lean,Archive/Meinhold576.lean,Archive/MeinholdGraphs.lean,Archive/PrimitiveGraphs.lean,Archive/TriangleGroupSurface.lean,Archive/VoltageGraphs.lean,Archive/ZhouGraph.lean,Mathlib.lean,Mathlib/Combinatorics/CellularSurface.lean,Mathlib/Combinatorics/SimpleGraph/Action.lean,Mathlib/Combinatorics/SimpleGraph/CosetGraph.lean,Mathlib/Combinatorics/SimpleGraph/QuotientGraph.lean,Mathlib/Combinatorics/SimpleGraph/Representation.lean,Mathlib/Combinatorics/SimpleGraph/SabidussiWitness.lean,Mathlib/Combinatorics/SimpleGraph/Symmetric.lean 25 2 ['github-actions'] nobody
0-18647
5 hours ago
0-18726
5 hours ago
0-18437
5 hours
39545 Hagb
author:Hagb
 feat(Order/OrderIsoNat): some lemmas about `((· < ·) : ℕ → ℕ → Prop) ↪r r` This PR contains several lemmas about relation embedding from `<` in `Nat`, well order, and (in)finiteness. - `RelEmbedding.infinite_iff_nonempty_relEmbedding_of_isWellOrder`: a type with a well order relation is infinite iff there is such a relation embedding. - `RelEmbedding.finite_iff_empty_relEmbedding_of_isWellOrder`: a finite variant of `infinite_iff_nonempty_relEmbedding_of_isWellOrder` - `IsWellOrder.finite_of_isWellOrder_of_isWellOrder_swap`: a type with a linear order relation well founded on both directions is finite. - `instFiniteOfWellFoundedLTOfWellFoundedGT`: an instance variant of `IsWellOrder.finite_of_isWellOrder_of_isWellOrder_swap` on `WellFounded{LT,GT}`. - `RelEmbedding.infinite_iff_nonempty_relEmbedding_lt_or_nonempty_relEmbedding_gt`: a type with a linear order relation is infinite iff there are both relation embedding between `<` in `Nat` and this relation, and between `>` in `Nat` and this relation. - `RelEmbedding.finite_iff_isEmpty_relEmbedding_lt_and_isEmpty_relEmbedding_gt`: a finite variant of `infinite_iff_nonempty_relEmbedding_lt_or_nonempty_relEmbedding_gt`. `RelEmbedding.finite_iff_empty_relEmbedding_of_isWellOrder` might be used for proof of ```lean example {α β γ} [LinearOrder α] [LinearOrder β] [WellFoundedLT α] [WellFoundedLT β] [LinearOrder γ] {f : α × β ≃ γ} (mono : Monotone f) : WellFoundedLT γ := sorry ``` The latter will be used for ```lean example {α β γ} [Finite α] [LinearOrder β] [WellFoundedLT β] [LinearOrder γ] {f : (α → β) ≃ γ} (mono : Monotone f) : WellFoundedLT γ := sorry ``` And the finial goal is the well-foundedness of monomial order when the index type `σ` is finite (under the definition in #39214). --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-order 58/0 Mathlib/Order/OrderIsoNat.lean 1 15 ['Hagb', 'SnirBroshi', 'github-actions', 'leanprover-radar', 'vihdzp'] nobody
0-18522
5 hours ago
3-15165
3 days ago
3-50316
3 days
39061 SnirBroshi
author:SnirBroshi
 feat(Combinatorics/SimpleGraph/Walk/Paths): a trail which isn't a path has a cycle subwalk - `p.IsPath ↔ ∀ (v : V) (w : G.Walk v v), w.IsSubwalk p → w.Nil` - `p.IsTrail → (p.IsPath ↔ ∀ (v : V) (w : G.Walk v v), w.IsSubwalk p → ¬w.IsCycle)` --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-combinatorics awaiting-author 28/0 Mathlib/Combinatorics/SimpleGraph/Paths.lean,Mathlib/Combinatorics/SimpleGraph/Walk/Decomp.lean 2 6 ['Rida-Hamadani', 'b-mehta', 'github-actions'] nobody
0-18458
5 hours ago
0-18458
5 hours ago
14-56805
14 days
39701 thothrde
author:thothrde
 feat(Condensed/Solid): prove profiniteSolidification is iso at finite types (partial) Proves partial results toward the open TODO in `Mathlib/Condensed/Solid.lean`: > TODO (hard): prove that `((profiniteSolid ℤ).obj S).IsSolid` for `S : Profinite`. ## New lemmas ### `CondensedMod.profiniteSolidCounit_isIso` The counit `(profiniteSolidCounit R).app T` is an isomorphism for every `T : FintypeCat`. **Proof:** `IsPointwiseRightKanExtension.isIso_hom` (using that `FintypeCat.toProfinite` is fully faithful) gives `IsIso (profiniteSolidCounit R)` as a natural transformation, and then `inferInstance` extracts the component-wise isomorphism. ### `CondensedMod.profiniteSolidification_comp_counit` The solidification composed with the counit equals the identity at `FintypeCat` objects: ``` (profiniteSolidification R).app (FintypeCat.toProfinite.obj T) ≫ (profiniteSolidCounit R).app T = 𝟙 _ ``` **Proof:** Direct from `liftOfIsRightKanExtension_fac_app`, since `profiniteSolidification` is defined as a `liftOfIsRightKanExtension`. ### `CondensedMod.profiniteSolidification_isIso_at_fintype` The solidification map is an isomorphism at every `FintypeCat.toProfinite.obj T`. **Proof:** Since solidification ≫ counit = id and counit is an isomorphism, `isIso_of_comp_hom_eq_id` gives that solidification = inv(counit), hence is also an isomorphism. ### `CondensedMod.profiniteSolid_isSolid_at_fintype` **Partial result:** `((profiniteSolid R).obj S).IsSolid` holds when the test object is `FintypeCat.toProfinite.obj T`. **Proof:** `profiniteSolidification_isIso_at_fintype` makes the solidification map an isomorphism in `CondensedMod R`; functoriality of `yoneda` then gives the isomorphism on hom-sets. ### `CondensedMod.profiniteSolid_obj_isSolid` (with `sorry`) States the full result. The remaining step requires showing that: 1. Every `X : Profinite` is a cofiltered limit of finite discrete quotients (`X.asLimit` from `Mathlib.Topology.Category.Profinite.AsLimit`, now imported). 2. The solid module condition is preserved under such limits. Point (2) follows from the adjunction `solidification ⊣ inclusionOfSolidModules`, which implies the inclusion preserves limits (being a right adjoint). **This adjunction has not yet been formalized in Mathlib**, and constitutes the remaining hard step. ## Open question The `sorry` in `profiniteSolid_obj_isSolid` can be removed once the following is formalized: ```lean lemma isSolid_of_isLimit {J : Type*} [SmallCategory J] {F : J ⥤ CondensedMod R} (c : Cone F) (hc : IsLimit c) (h : ∀ j, (F.obj j).IsSolid) : c.pt.IsSolid ``` This requires the adjunction between the solidification functor and the inclusion of solid modules into condensed modules. ## Changes - Added `import Mathlib.Topology.Category.Profinite.AsLimit` (needed for `X.asLimit`) - Added 4 new lemmas + 1 theorem (with sorry) to `Mathlib/Condensed/Solid.lean` - Replaced the old TODO comments with structured documentation ## Notes This PR is a work in progress. The four new lemmas are fully proved (no sorry). The main theorem `profiniteSolid_obj_isSolid` contains one sorry with a detailed proof sketch in its docstring. The leanprover-community CI will show one sorry warning, which is intentional and documented. t-condensed new-contributor 121/11 Mathlib/Condensed/Solid.lean 1 2 ['github-actions'] nobody
0-18197
5 hours ago
unknown
0-0
0 seconds
39621 chrisflav
author:chrisflav
 refactor(Topology): use `WithTopology` to define `WithConstructibleTopology` We replace the type synonym `WithConstructibleTopology` by `WithTopology _ (constructibleTopology X)`. This breaks the def-eq `X = WithConstructibleTopology X`, which was luckily not abused much yet. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-topology 38/5 Mathlib/Topology/Compactness/Compact.lean,Mathlib/Topology/Spectral/ConstructibleTopology.lean,Mathlib/Topology/WithTopology.lean 3 2 ['github-actions', 'plp127'] nobody
0-18028
5 hours ago
2-20219
2 days ago
2-19930
2 days
39691 Raph-DG
author:Raph-DG
 feat(Topology): An open cover of a preconnected set has no isolated components In this PR we show that a family of open sets whose union is preconnected has the property that for any two (nonempty) sets U and V in the cover there is a sequence of sets in the cover U = U_0, U_1,..., U_n = V such that U_i \cap U_{i+1} is nonempty for all i. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-topology 20/0 Mathlib/Topology/Connected/Basic.lean 1 2 ['github-actions', 'plp127'] nobody
0-17796
4 hours ago
0-43496
12 hours ago
0-43207
12 hours
39145 chrisflav
author:chrisflav
 feat(Algebra/Category): filtered colimits in `AlgCat` From Proetale. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra t-category-theory
label:t-algebra$
 133/18 Mathlib.lean,Mathlib/Algebra/Category/AlgCat/Basic.lean,Mathlib/Algebra/Category/AlgCat/FilteredColimits.lean,Mathlib/CategoryTheory/ConcreteCategory/ReflectsIso.lean,Mathlib/CategoryTheory/Limits/ConcreteCategory/Basic.lean 5 12 ['chrisflav', 'dagurtomas', 'github-actions', 'leanprover-radar', 'robin-carlier'] nobody
0-17599
4 hours ago
0-17661
4 hours ago
4-479
4 days
39600 plp127
author:plp127
 chore(Topology/Compactness/CountablyCompact): generalize theorem Generalize theorem `Topology.IsEmbedding.isSeqCompact_iff` to `Topology.IsInducing.isSeqCompact_iff` by replacing `IsEmbedding` by `IsInducing`. Also fix capitalization error. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-topology awaiting-author 6/3 Mathlib/Topology/Compactness/CountablyCompact.lean 1 4 ['github-actions', 'plp127', 'themathqueen'] nobody
0-17313
4 hours ago
0-17313
4 hours ago
2-62959
2 days
39719 JovanGerb
author:JovanGerb
 perf: shortcut instances for `Semiring` --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra awaiting-CI
label:t-algebra$
 6/0 Mathlib/Algebra/Ring/Defs.lean 1 4 ['JovanGerb', 'github-actions', 'leanprover-radar'] nobody
0-17284
4 hours ago
0-17650
4 hours ago
0-73
1 minute
39594 chrisflav
author:chrisflav
 chore(CategoryTheory/Limits): some API for binary (co)products We add `BinaryFan.IsLimit.lift` as the analogue to `Fan.IsLimit.lift` and `BinaryFan.isLimitMapConeEquiv` as the analogue to `Fan.isLimitMapConeEquiv`. We also add the dual versions. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-category-theory 116/50 Mathlib/CategoryTheory/Adhesive/Basic.lean,Mathlib/CategoryTheory/Limits/Constructions/BinaryProducts.lean,Mathlib/CategoryTheory/Limits/MonoCoprod.lean,Mathlib/CategoryTheory/Limits/Preorder.lean,Mathlib/CategoryTheory/Limits/Shapes/BinaryBiproducts.lean,Mathlib/CategoryTheory/Limits/Shapes/BinaryProducts.lean,Mathlib/CategoryTheory/Limits/Shapes/Pullback/IsPullback/Basic.lean,Mathlib/CategoryTheory/Limits/Types/Products.lean,Mathlib/CategoryTheory/Preadditive/Biproducts.lean 9 6 ['chrisflav', 'dagurtomas', 'github-actions', 'joelriou'] nobody
0-17042
4 hours ago
0-17042
4 hours ago
2-7518
2 days
38153 xroblot
author:xroblot
 chore(IsGaloisGroup): refactor `IsGaloisGroup.quotient` Refactors the quotient construction in `IsGaloisGroup` to work at the level of ring extensions rather than intermediate fields. --- - [x] depends on: #38377 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra
label:t-algebra$
 189/58 Mathlib/Algebra/Algebra/Basic.lean,Mathlib/FieldTheory/Galois/IsGaloisGroup.lean 2 39 ['Garmelon', 'github-actions', 'leanprover-radar', 'mathlib-dependent-issues', 'mathlib-merge-conflicts', 'riccardobrasca', 'tb65536', 'xroblot'] riccardobrasca
assignee:riccardobrasca
0-16656
4 hours ago
0-28804
7 hours ago
10-42981
10 days
39468 ADedecker
author:ADedecker
 feat: LinearMap.HasFiniteRank and the associated relation This was written by @PatrickMassot at the May 2026 ICERM workshop as part of the project on Fredholm operators. This also adds three supporting lemmas: `map_smul_le_map`, `range_smul_le_range` and `ker_le_ker_smul`. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra awaiting-author
label:t-algebra$
 219/8 Mathlib.lean,Mathlib/Algebra/Module/Submodule/Ker.lean,Mathlib/Algebra/Module/Submodule/Map.lean,Mathlib/Algebra/Module/Submodule/Range.lean,Mathlib/LinearAlgebra/FiniteRankLinearMap.lean,Mathlib/RingTheory/Noetherian/Basic.lean 6 6 ['ADedecker', 'github-actions', 'ocfnash'] nobody
0-16123
4 hours ago
3-24573
3 days ago
2-75064
2 days
36739 mbkybky
author:mbkybky
 feat(RingTheory): UFD criteria via height `1` prime ideals and localization We prove the following UFD criteria via height `1` prime ideals and localization: 1. Let `R` be a Noetherian domain. Then `R` is a UFD if and only if every height `1` prime ideal is principal. 2. Let `R` be a Noetherian domain, `x ∈ R` be a prime element. If `Rₓ` is a UFD, then `R` is also a UFD. - [ ] depends on: #37627 - [x] depends on: #38933 --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-ring-theory 375/138 Mathlib.lean,Mathlib/AlgebraicGeometry/Properties.lean,Mathlib/RingTheory/Ideal/Height.lean,Mathlib/RingTheory/Ideal/KrullsHeightTheorem.lean,Mathlib/RingTheory/Ideal/Maximal.lean,Mathlib/RingTheory/Ideal/UFD.lean,Mathlib/RingTheory/KrullDimension/PID.lean,Mathlib/RingTheory/Localization/Away/Basic.lean,Mathlib/RingTheory/UniqueFactorizationDomain/Localization.lean 9 20 ['chrisflav', 'github-actions', 'mathlib-dependent-issues', 'mbkybky', 'tb65536'] chrisflav
assignee:chrisflav
0-11905
3 hours ago
0-11908
3 hours ago
60-84273
60 days
29701 Thmoas-Guan
author:Thmoas-Guan
 feat(Algebra/RingTheory): polynomial over regular ring In this PR, we proved that polynomial over regular ring is regular. --- - [x] depends on: #37627 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-ring-theory 309/136 Mathlib.lean,Mathlib/AlgebraicGeometry/Properties.lean,Mathlib/RingTheory/Ideal/Height.lean,Mathlib/RingTheory/Ideal/KrullsHeightTheorem.lean,Mathlib/RingTheory/KrullDimension/PID.lean,Mathlib/RingTheory/RegularLocalRing/Polynomial.lean 6 5 ['github-actions', 'mathlib-dependent-issues', 'mathlib-merge-conflicts', 'mathlib4-merge-conflict-bot'] joneugster
assignee:joneugster
0-11717
3 hours ago
0-11720
3 hours ago
25-4796
25 days
28683 Thmoas-Guan
author:Thmoas-Guan
 feat(RingTheory): regular local ring is domain In this PR, we proved for a regular local ring `R`, 1 : for a finite set `S` in the maximal Ideal of `R`, it can be extended to a regular system of parameters iff they are linear independent in the cotangent space iff `R/span S` is regular local ring of dimesion `dim R - |S|` 2 : is domain 3 : regular system of parameter form regular sequence. --- - [x] depends on: #28682 - [ ] depends on: #37627 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-ring-theory 505/136 Mathlib.lean,Mathlib/Algebra/Module/SpanRank.lean,Mathlib/AlgebraicGeometry/Properties.lean,Mathlib/RingTheory/Ideal/Height.lean,Mathlib/RingTheory/Ideal/KrullsHeightTheorem.lean,Mathlib/RingTheory/Ideal/Operations.lean,Mathlib/RingTheory/KrullDimension/PID.lean,Mathlib/RingTheory/RegularLocalRing/Basic.lean 8 57 ['Raph-DG', 'Thmoas-Guan', 'WenrongZou', 'erdOne', 'github-actions', 'mathlib-dependent-issues', 'mathlib-merge-conflicts', 'mathlib4-merge-conflict-bot', 'mbkybky'] nobody
0-11694
3 hours ago
0-11697
3 hours ago
1-61388
1 day
39413 vihdzp
author:vihdzp
 bug: turning theorem into alias breaks bound tactic I have no idea what's going on. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra will-close-soon
label:t-algebra$
 1/3 Mathlib/Algebra/Order/Monoid/Unbundled/Basic.lean 1 1 ['github-actions'] nobody
0-10785
2 hours ago
unknown
0-0
0 seconds
39584 Whysoserioushah
author:Whysoserioushah
 feat(LinearAlgebra/Projectivization/Action): add instance of SL(n, F) acting on PF^n --- - [ ] depends on: #39581 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra
label:t-algebra$
 39/0 Mathlib/LinearAlgebra/Matrix/SpecialLinearGroup.lean,Mathlib/LinearAlgebra/Projectivization/Action.lean 2 2 ['github-actions', 'mathlib-dependent-issues'] nobody
0-10000
2 hours ago
0-10002
2 hours ago
0-30558
8 hours
39720 vihdzp
author:vihdzp
 feat: cofinality within order We introduce `Order.cofWithin x = Order.cof (Iio x)` for the cofinality of an element within a preorder. This generalizes `Ordinal.cof`, with the caveat that `cof o : Cardinal.{u}` for `o : Ordinal.{u}`, whereas `cofWithin o : Cardinal.{u + 1}`. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-set-theory 103/18 Mathlib/SetTheory/Cardinal/Basic.lean,Mathlib/SetTheory/Cardinal/Cofinality/Basic.lean,Mathlib/SetTheory/Cardinal/Cofinality/Ordinal.lean 3 2 ['SnirBroshi', 'github-actions'] nobody
0-8442
2 hours ago
0-15174
4 hours ago
0-15408
4 hours
26245 Thmoas-Guan
author:Thmoas-Guan
 feat(Algebra): cohen macaulay local ring is catenary We prove Cohen Macaulay local ring is catenary. Following Theorem 31, Chater 6, _Commutative Algebra_, Matsumura --- - [ ] depends on: #26218 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra blocked-by-other-PR large-import merge-conflict
label:t-algebra$
 2300/163 Mathlib.lean,Mathlib/Algebra/Category/ModuleCat/Basic.lean,Mathlib/Algebra/Category/ModuleCat/Ext/Basic.lean,Mathlib/AlgebraicGeometry/Properties.lean,Mathlib/RingTheory/CohenMacaulay/Basic.lean,Mathlib/RingTheory/CohenMacaulay/Catenary.lean,Mathlib/RingTheory/Depth/Basic.lean,Mathlib/RingTheory/Depth/Ischebeck.lean,Mathlib/RingTheory/Depth/Rees.lean,Mathlib/RingTheory/Ideal/Height.lean,Mathlib/RingTheory/Ideal/KrullsHeightTheorem.lean,Mathlib/RingTheory/Ideal/Maps.lean,Mathlib/RingTheory/KrullDimension/PID.lean,Mathlib/RingTheory/Regular/LinearMap.lean,docs/references.bib 15 19 ['github-actions', 'leanprover-community-bot-assistant', 'mathlib-merge-conflicts', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
0-8387
2 hours ago
335-49405
335 days ago
0-18
18 seconds
26957 Thmoas-Guan
author:Thmoas-Guan
 feat(Algebra): unmixed thm of Cohen-Macaulay ring In this PR we proved for a (comm)ring `R`, `R` is Cohen-Macaulay ring iff the unmixed theorem holds (for every ideal `I` of height `r` generated by `r` elements, all associated primes of `R/I` have height `r` ) --- - [ ] depends on: #26245 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra blocked-by-other-PR large-import merge-conflict
label:t-algebra$
 2479/163 Mathlib.lean,Mathlib/Algebra/Category/ModuleCat/Basic.lean,Mathlib/Algebra/Category/ModuleCat/Ext/Basic.lean,Mathlib/AlgebraicGeometry/Properties.lean,Mathlib/RingTheory/CohenMacaulay/Basic.lean,Mathlib/RingTheory/CohenMacaulay/Catenary.lean,Mathlib/RingTheory/CohenMacaulay/Unmixed.lean,Mathlib/RingTheory/Depth/Basic.lean,Mathlib/RingTheory/Depth/Ischebeck.lean,Mathlib/RingTheory/Depth/Rees.lean,Mathlib/RingTheory/Ideal/Height.lean,Mathlib/RingTheory/Ideal/KrullsHeightTheorem.lean,Mathlib/RingTheory/Ideal/Maps.lean,Mathlib/RingTheory/KrullDimension/PID.lean,Mathlib/RingTheory/Regular/LinearMap.lean,docs/references.bib 16 17 ['github-actions', 'leanprover-community-bot-assistant', 'mathlib-merge-conflicts', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
0-8386
2 hours ago
316-43200
316 days ago
0-229
3 minutes
39703 YaelDillies
author:YaelDillies
 chore: create a `Basic` top folder Move a select few folders from `Logic` to a new `basic` folder. The goal is to finally move the material misplaced in the `Data` and `Logic` folder. Many more files (~1000) could be moved, so I will do it in several PRs. Not all files should move to `Basic`. Some files should go to `Algebra.Order instead (eg `Data.Nat.Lattice`) and some should be straight out deprecated (eg `Data.Analysis`). This PR stems from discussions at the MI retreat 2026. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) file-removed awaiting-author 146/95 Counterexamples/Girard.lean,Mathlib.lean,Mathlib/Algebra/CharZero/Defs.lean,Mathlib/Algebra/Group/Irreducible/Defs.lean,Mathlib/Algebra/Group/Nat/Units.lean,Mathlib/Algebra/Group/Pi/Basic.lean,Mathlib/Algebra/Group/Units/Basic.lean,Mathlib/Algebra/Group/WithOne/Defs.lean,Mathlib/Algebra/GroupWithZero/Basic.lean,Mathlib/Algebra/GroupWithZero/Defs.lean,Mathlib/Algebra/Module/Presentation/Free.lean,Mathlib/Algebra/Module/Projective.lean,Mathlib/Algebra/NeZero.lean,Mathlib/Basic/Denumerable.lean,Mathlib/Basic/ExistsUnique.lean,Mathlib/Basic/IsEmpty.lean,Mathlib/Basic/IsEmpty/Basic.lean,Mathlib/Basic/IsEmpty/Defs.lean,Mathlib/Basic/Logic/Basic.lean,Mathlib/Basic/Logic/Lemmas.lean,Mathlib/Basic/Nonempty.lean,Mathlib/Basic/Nontrivial/Basic.lean,Mathlib/Basic/Nontrivial/Defs.lean,Mathlib/Basic/README.md,Mathlib/Basic/Unique.lean,Mathlib/Basic/UnivLE.lean,Mathlib/CategoryTheory/EssentiallySmall.lean,Mathlib/CategoryTheory/Limits/Types/Colimits.lean,Mathlib/CategoryTheory/Limits/Types/Limits.lean,Mathlib/CategoryTheory/UnivLE.lean,Mathlib/Combinatorics/Quiver/Path.lean,Mathlib/Computability/Primrec/Basic.lean,Mathlib/Data/Bool/Basic.lean,Mathlib/Data/FunLike/Basic.lean,Mathlib/Data/List/Basic.lean,Mathlib/Data/List/GetD.lean,Mathlib/Data/Nat/Basic.lean,Mathlib/Data/Nat/MaxPowDiv.lean,Mathlib/Data/Option/Basic.lean,Mathlib/Data/Quot.lean,Mathlib/Data/README.md,Mathlib/Data/Rat/Denumerable.lean,Mathlib/Data/TwoPointing.lean,Mathlib/Lean/Meta/CongrTheorems.lean,Mathlib/LinearAlgebra/Matrix/Defs.lean,Mathlib/Logic/Equiv/Defs.lean,Mathlib/Logic/Equiv/List.lean,Mathlib/Logic/Function/Basic.lean,Mathlib/Logic/README.md,Mathlib/Order/OrderIsoNat.lean,Mathlib/Order/RelClasses.lean,Mathlib/Order/WithBot.lean,Mathlib/RingTheory/Coprime/Basic.lean,Mathlib/SetTheory/Cardinal/Basic.lean,Mathlib/SetTheory/Cardinal/UnivLE.lean,Mathlib/SetTheory/ZFC/Rank.lean,Mathlib/Tactic/CancelDenoms/Core.lean,Mathlib/Tactic/CongrExclamation.lean,Mathlib/Tactic/ITauto.lean,Mathlib/Tactic/Linter/DirectoryDependency.lean,Mathlib/Tactic/Nontriviality/Core.lean,Mathlib/Tactic/Push.lean,Mathlib/Tactic/Subsingleton.lean,Mathlib/Tactic/Tauto.lean,Mathlib/Testing/Plausible/Testable.lean,Mathlib/Topology/Order/UpperLowerSetTopology.lean,MathlibTest/PrivateModuleLinter/importOnly.lean,scripts/noshake.json 68 4 ['YaelDillies', 'github-actions', 'grunweg', 'themathqueen'] nobody
0-8105
2 hours ago
0-8152
2 hours ago
0-20437
5 hours
39572 chrisflav
author:chrisflav
 feat(Algebra/Category/Ring): `Under.pushout` preserves finite coproducts for properties with stable equalizers We introduce a predicate `RingHom.HasStableEqualizers` for properties of ring homomorphisms: This is satisfied for `P` if base change along *arbitrary* ring homomorphisms preserves the equalizer of any two algebra maps between algebras satisfying `P`. In a follow-up PR we will show that finite étale ring homomorphisms satisfy this predicate. We relate `RingHom.HasStableEqualizers` to preservation of finite limits in `P.Under R` for `R : CommRingCat`. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-category-theory awaiting-author 126/2 Mathlib/Algebra/Category/Ring/Under/Basic.lean,Mathlib/Algebra/Category/Ring/Under/Property.lean,Mathlib/CategoryTheory/MorphismProperty/Limits.lean,Mathlib/CategoryTheory/MorphismProperty/OverAdjunction.lean,Mathlib/RingTheory/Flat/Equalizer.lean 5 4 ['dagurtomas', 'github-actions', 'mathlib-splicebot'] robin-carlier
assignee:robin-carlier
0-7993
2 hours ago
1-8886
1 day ago
2-28563
2 days
39311 felixpernegger
author:felixpernegger
 refactor: redefine `eLpNorm` at `p = 0` For Zulip discussion see https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/eLpNorm.20junk.20value/with/576356442. In partuclar this change is suggestion 2 in [#mathlib4 > eLpNorm junk value @ 💬](https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/eLpNorm.20junk.20value/near/576340531) This redefined [MeasureTheory.eLpNorm](https://leanprover-community.github.io/mathlib4_docs/Mathlib/MeasureTheory/Function/LpSeminorm/Defs.html#MeasureTheory.eLpNorm) at `p = 0`. Previously it was always `0` but now it is the measure of the support of the function (technical detail: In order to avoid having to add additional arguments to `eLpNorm`, we define it as the measure of the support of the norm of the function, but this is almost always the same) The motivation for this comes from the counting measure, in particular this then unifies with https://leanprover-community.github.io/mathlib4_docs/Mathlib/Analysis/Normed/Lp/lpSpace.html#Mem%E2%84%93p. In any case, it is "closer" to the actual mathematical definition Unfortunately, since `eLpNorm` is widely used, the diff is very large and a lot of theorems break (i.e. now require `p != 0`). Oftentimes `p != 0` is still not required (sometimes with nontrivial arguments), I tried to avoid adding extra hypothesis whenever I could but I almost certainly missed some. There now may also be places where we dont need `p != 0` as a hypothesis anymore (i.e. for `[Memℓp](https://leanprover-community.github.io/mathlib4_docs/Mathlib/Analysis/Normed/Lp/lpSpace.html#Mem%E2%84%93p)`), but this is not included in this PR. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) 915/576 Mathlib/Analysis/Distribution/ContDiffMapSupportedIn.lean,Mathlib/Analysis/Distribution/SchwartzSpace/Basic.lean,Mathlib/Analysis/Distribution/SchwartzSpace/Fourier.lean,Mathlib/Analysis/Distribution/TemperateGrowth.lean,Mathlib/Analysis/Distribution/TemperedDistribution.lean,Mathlib/Analysis/Distribution/TestFunction.lean,Mathlib/Analysis/Fourier/LpSpace.lean,Mathlib/Analysis/FunctionalSpaces/SobolevInequality.lean,Mathlib/Analysis/Normed/Lp/SmoothApprox.lean,Mathlib/Data/ENNReal/Holder.lean,Mathlib/MeasureTheory/Function/ContinuousMapDense.lean,Mathlib/MeasureTheory/Function/ConvergenceInMeasure.lean,Mathlib/MeasureTheory/Function/Holder.lean,Mathlib/MeasureTheory/Function/L1Space/Integrable.lean,Mathlib/MeasureTheory/Function/L2Space.lean,Mathlib/MeasureTheory/Function/LpSeminorm/Basic.lean,Mathlib/MeasureTheory/Function/LpSeminorm/CompareExp.lean,Mathlib/MeasureTheory/Function/LpSeminorm/Defs.lean,Mathlib/MeasureTheory/Function/LpSeminorm/Indicator.lean,Mathlib/MeasureTheory/Function/LpSeminorm/LpNorm.lean,Mathlib/MeasureTheory/Function/LpSeminorm/Monotonicity.lean,Mathlib/MeasureTheory/Function/LpSeminorm/SMul.lean,Mathlib/MeasureTheory/Function/LpSeminorm/TriangleInequality.lean,Mathlib/MeasureTheory/Function/LpSeminorm/Trim.lean,Mathlib/MeasureTheory/Function/LpSpace/Basic.lean,Mathlib/MeasureTheory/Function/LpSpace/Complete.lean,Mathlib/MeasureTheory/Function/LpSpace/ContinuousFunctions.lean,Mathlib/MeasureTheory/Function/LpSpace/Indicator.lean,Mathlib/MeasureTheory/Function/SimpleFuncDenseLp.lean,Mathlib/MeasureTheory/Function/UniformIntegrable.lean,Mathlib/MeasureTheory/Integral/SetToL1.lean,Mathlib/Probability/CentralLimitTheorem.lean,Mathlib/Probability/Distributions/Gaussian/Basic.lean,Mathlib/Probability/Distributions/Gaussian/Fernique.lean,Mathlib/Probability/Distributions/Gaussian/HasGaussianLaw/Basic.lean,Mathlib/Probability/Distributions/Gaussian/Real.lean,Mathlib/Probability/IdentDistrib.lean,Mathlib/Probability/Kernel/Disintegration/CDFToKernel.lean,Mathlib/Probability/Kernel/Disintegration/Density.lean,Mathlib/Probability/Martingale/Convergence.lean,Mathlib/Probability/Moments/CovarianceBilinDual.lean,Mathlib/Probability/Moments/IntegrableExpMul.lean,Mathlib/Probability/Moments/SubGaussian.lean,Mathlib/Probability/Process/Filtration.lean,MathlibTest/congr.lean 45 26 ['felixpernegger', 'github-actions', 'mathlib-merge-conflicts', 'sgouezel'] nobody
0-7168
1 hour ago
0-7168
1 hour ago
0-66577
18 hours
39664 kim-em
author:kim-em
 feat(CrossRefAttribute): info-view widget for cross-reference tags This PR teaches the info view to show the upstream label and description when the cursor sits on a `@[stacks ...]`, `@[kerodon ...]`, or `@[wikidata ...]` attribute. The fetch is on-demand via an RPC call from the widget to the Lean server, which shells out to `curl`; we deliberately do not fetch at attribute-elaboration time so offline builds stay clean and the only network access is when an editing session opens the panel. Two new modules and a small refactor to the existing one: - `Mathlib/Tactic/CrossRef/Fetch.lean` (new) holds the `Database` enum and the snippet-fetch logic. The companion `scripts/crossref-snippet.lean` in the stacked PR reimplements the same logic standalone for CI usage; the two are kept in sync deliberately so the CI script doesn't need a Mathlib build. - `Mathlib/Tactic/Widget/CrossRefHover.lean` (new) defines the widget itself: an `RpcEncodable` props record, a `RequestM` RPC method that calls `fetchSnippet`, and a `mk_rpc_widget%` Component that renders the result as `Html`. - `Mathlib/Tactic/CrossRefAttribute.lean` (modified) imports the two new modules, removes the now-duplicated `Database` / `databaseURL` / `databaseLabel` definitions, and calls `Widget.savePanelWidgetInfo` in each attribute's `add` handler. Tag storage, docstring rewriting, and the trace commands are untouched, and the existing `MathlibTest/CrossRefAttribute.lean` suite continues to pass — none of the behaviour visible to it changes. If `curl` is missing or the upstream site is unreachable, the widget renders an inline error instead of blocking the LSP. - [x] depends on: #39662 🤖 Prepared with Claude Code blocked-by-other-PR 1353/25 Mathlib.lean,Mathlib/Tactic.lean,Mathlib/Tactic/CrossRef/Fetch.lean,Mathlib/Tactic/CrossRefAttribute.lean,Mathlib/Tactic/Widget/CrossRefHover.lean,scripts/README.md,scripts/crossref.lean 7 10 ['eric-wieser', 'github-actions', 'jcommelin', 'kim-em', 'mathlib-dependent-issues'] nobody
0-7052
1 hour ago
unknown
0-0
0 seconds
39722 kg583
author:kg583
 feat(Combinatorics): Link `Nat.Partition` to `YoungDiagram` --- AI disclosure: Claude was used to source some proof sketches. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-combinatorics new-contributor 96/4 Mathlib/Combinatorics/Enumerative/Partition/Basic.lean 1 2 ['github-actions'] nobody
0-6628
1 hour ago
0-6702
1 hour ago
0-6413
1 hour
39113 sgouezel
author:sgouezel
 feat: integration by parts for stieltjes vector measures --- - [ ] depends on: #39614 - [x] depends on: #39615 - [ ] depends on: #39616 - [ ] depends on: #39652 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-measure-probability blocked-by-other-PR 1708/237 Mathlib.lean,Mathlib/Analysis/Normed/Group/InfiniteSum.lean,Mathlib/Analysis/Normed/Operator/Basic.lean,Mathlib/Data/ENNReal/Action.lean,Mathlib/MeasureTheory/Function/AEEqFun.lean,Mathlib/MeasureTheory/Function/ConditionalExpectation/Basic.lean,Mathlib/MeasureTheory/Function/ConditionalExpectation/CondexpL1.lean,Mathlib/MeasureTheory/Function/LpSpace/Basic.lean,Mathlib/MeasureTheory/Function/LpSpace/CompleteOfCompleteLp.lean,Mathlib/MeasureTheory/Integral/Bochner/Basic.lean,Mathlib/MeasureTheory/Integral/DominatedConvergence.lean,Mathlib/MeasureTheory/Integral/Prod.lean,Mathlib/MeasureTheory/Measure/MeasureSpace.lean,Mathlib/MeasureTheory/VectorMeasure/Basic.lean,Mathlib/MeasureTheory/VectorMeasure/Integral.lean,Mathlib/MeasureTheory/VectorMeasure/SetIntegral.lean,Mathlib/MeasureTheory/VectorMeasure/Variation/Basic.lean,Mathlib/MeasureTheory/VectorMeasure/WithDensityVec.lean,Mathlib/Probability/Kernel/Composition/IntegralCompProd.lean,Mathlib/Probability/Kernel/Disintegration/Density.lean,Mathlib/Probability/Martingale/Basic.lean,Mathlib/Probability/Martingale/Centering.lean 22 3 ['github-actions', 'mathlib-bors', 'mathlib-dependent-issues'] nobody
0-6599
1 hour ago
13-44084
13 days ago
0-8
8 seconds
39059 vihdzp
author:vihdzp
 feat: `IsBotOneClass (Associates M)` --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra large-import maintainer-merge
label:t-algebra$
 11/9 Mathlib/Algebra/GroupWithZero/Associated.lean,Mathlib/RingTheory/ChainOfDivisors.lean 2 2 ['YaelDillies', 'github-actions'] nobody
0-6544
1 hour ago
0-10798
2 hours ago
14-77691
14 days
38234 vihdzp
author:vihdzp
 chore: make `IsSuccLimit` a structure This lets us name the fields. Note that the `mk_iff` lemma overwrites a recently deprecated theorem. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-order maintainer-merge 40/33 Mathlib/Order/SuccPred/InitialSeg.lean,Mathlib/Order/SuccPred/Limit.lean 2 6 ['YaelDillies', 'github-actions', 'plp127'] nobody
0-6481
1 hour ago
13-50940
13 days ago
29-38938
29 days
39523 kim-em
author:kim-em
 feat(LinearAlgebra/Trace): trace-zero idempotent endomorphism over CharZero field is zero This PR adds `LinearMap.IsIdempotentElem.eq_zero_of_trace_eq_zero`: an idempotent endomorphism of a finite-dimensional vector space over a characteristic-zero field with vanishing trace is the zero map. The proof routes through `LinearMap.IsProj.trace` (already in this file) — for an idempotent `e`, the trace equals the rank of `range e`. Over a `CharZero` field, vanishing trace forces the rank to zero, hence `range e = ⊥` and `e = 0`. 🤖 Prepared with Claude Code t-algebra maintainer-merge awaiting-author
label:t-algebra$
 19/0 Mathlib/LinearAlgebra/Trace.lean 1 4 ['github-actions', 'jcommelin', 'themathqueen'] nobody
0-6324
1 hour ago
0-39282
10 hours ago
0-41747
11 hours
37685 vihdzp
author:vihdzp
 feat: Fodor's lemma We define stationary sets and prove Fodor's lemma, following the proof at Wikipedia. --- - [ ] depends on: #37677 - [ ] depends on: #38362 I'm surprised that this has a [Wikipedia article](https://en.wikipedia.org/wiki/Fodor%27s_lemma) but isn't listed in 1000.yaml. Is it just because the name has "lemma" instead of "theorem"? [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-set-theory t-order blocked-by-other-PR 285/35 Mathlib.lean,Mathlib/Order/BoundedOrder/Basic.lean,Mathlib/Order/Cofinal.lean,Mathlib/SetTheory/Cardinal/Aleph.lean,Mathlib/SetTheory/Cardinal/Cofinality/Club.lean,Mathlib/SetTheory/Cardinal/Cofinality/Enum.lean,Mathlib/SetTheory/Cardinal/Cofinality/Ordinal.lean,Mathlib/SetTheory/Ordinal/Basic.lean 8 7 ['github-actions', 'mathlib-dependent-issues', 'mathlib-merge-conflicts', 'staroperator', 'vihdzp'] nobody
0-6060
1 hour ago
46-64032
46 days ago
0-1337
22 minutes
31018 joelriou
author:joelriou
 feat(CategoryTheory): sharply smaller regular cardinals WIP --- - [ ] depends on: #39669 - [ ] depends on: #39655 - [x] depends on: #30727 - [x] depends on: #31767 - [x] depends on: #29519 - [x] depends on: #29543 - [x] depends on: #29565 - [x] depends on: #29854 - [x] depends on: #30459 - [x] depends on: #30605 - [x] depends on: #31426 - [x] depends on: #31421 - [x] depends on: #30633 - [x] depends on: #30634 - [x] depends on: #30693 - [x] depends on: #30696 - [x] depends on: #30781 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) WIP t-category-theory blocked-by-other-PR 729/7 Mathlib.lean,Mathlib/CategoryTheory/Presentable/Basic.lean,Mathlib/CategoryTheory/Presentable/CardinalDirectedPoset.lean,Mathlib/CategoryTheory/Presentable/SharplyLT.lean,Mathlib/Order/Category/PartOrdEmb.lean 5 4 ['github-actions', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
0-4743
1 hour ago
206-19336
206 days ago
0-1
1 second
39721 Vierkantor
author:Vierkantor
 feat(Tactic): automatically replace convert with convert! This PR makes any use of `convert` pop up a "Try this:" message replacing it with `convert!`. This prepares for #39039 which will make `convert` change behaviour and `convert!` retain the old behaviour. Note that `convert` and `convert!` still do the same thing and result in the same goals after this PR is applied, except `convert!` does not pop up a "Try this:" afterwards. --- After the code in this PR passes an initial review, I will run Skimmer to apply all the "Try this:" messages. - [ ] depends on: #39715 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-meta 39/8 Mathlib/Tactic/Convert.lean 1 4 ['Vierkantor', 'github-actions', 'grunweg', 'mathlib-dependent-issues'] grunweg
assignee:grunweg
0-4605
1 hour ago
0-3870
59 minutes ago
0-2589
43 minutes
39039 Vierkantor
author:Vierkantor
 feat(Tactic): congr! and convert now discharge side goals at reducible transparency This PR changes the `postCongr!` discharge step of the `congr!` and `convert` tactics to operate at reducible transparency by default, just like the `preCongr!` step. This should make the behaviour more predictable since it does not unfold quite as much. `convert_to` and `ac_change` get a similar modification, since they are macros on top of `convert`. To get back the old behaviour and work at default transparency, write `convert!`. To make Mathlib not break due to this change, we replace all occurrences of `convert` with `convert!` in the next commit. Zulip discussion: https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/Mathlib.20code.20quality.3A.20simpa/with/594729278 --- - [ ] depends on: #39715 - [ ] depends on: #39721 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-meta merge-conflict awaiting-author blocked-by-other-PR 2832/2501 Archive/Imo/Imo1982Q3.lean,Archive/Imo/Imo2006Q5.lean,Archive/Imo/Imo2008Q2.lean,Archive/Imo/Imo2015Q6.lean,Archive/Imo/Imo2024Q1.lean,Archive/Imo/Imo2024Q2.lean,Archive/Imo/Imo2024Q3.lean,Archive/Imo/Imo2024Q5.lean,Archive/Kuratowski.lean,Archive/Sensitivity.lean,Archive/Wiedijk100Theorems/AbelRuffini.lean,Archive/Wiedijk100Theorems/AreaOfACircle.lean,Archive/Wiedijk100Theorems/CubingACube.lean,Counterexamples/MapFloor.lean,Counterexamples/NowhereDifferentiable.lean,Counterexamples/Phillips.lean,Counterexamples/TopologistsSineCurve.lean,Counterexamples/ZeroDivisorsInAddMonoidAlgebras.lean,Mathlib/Algebra/Algebra/Spectrum/Pi.lean,Mathlib/Algebra/Algebra/Subalgebra/Lattice.lean,Mathlib/Algebra/BigOperators/Associated.lean,Mathlib/Algebra/BigOperators/Finprod.lean,Mathlib/Algebra/BigOperators/Group/Finset/Basic.lean,Mathlib/Algebra/BigOperators/Group/Finset/Defs.lean,Mathlib/Algebra/BigOperators/Group/Finset/Piecewise.lean,Mathlib/Algebra/BigOperators/Group/List/Basic.lean,Mathlib/Algebra/BigOperators/Group/Multiset/Basic.lean,Mathlib/Algebra/BigOperators/Intervals.lean,Mathlib/Algebra/BigOperators/Pi.lean,Mathlib/Algebra/Category/Grp/ZModuleEquivalence.lean,Mathlib/Algebra/Category/ModuleCat/Descent.lean,Mathlib/Algebra/Category/ModuleCat/Subobject.lean,Mathlib/Algebra/Category/ModuleCat/Topology/Basic.lean,Mathlib/Algebra/Category/Ring/Topology.lean,Mathlib/Algebra/CharP/Invertible.lean,Mathlib/Algebra/CharP/MixedCharZero.lean,Mathlib/Algebra/CharP/Reduced.lean,Mathlib/Algebra/Colimit/Module.lean,Mathlib/Algebra/DirectSum/LinearMap.lean,Mathlib/Algebra/DirectSum/Module.lean,Mathlib/Algebra/Group/Fin/Tuple.lean,Mathlib/Algebra/Group/Finsupp.lean,Mathlib/Algebra/Group/ForwardDiff.lean,Mathlib/Algebra/Group/Pointwise/Set/Finite.lean,Mathlib/Algebra/Group/Subgroup/Ker.lean,Mathlib/Algebra/Group/Subsemigroup/Operations.lean,Mathlib/Algebra/Homology/CommSq.lean,Mathlib/Algebra/Homology/DerivedCategory/KInjective.lean,Mathlib/Algebra/Homology/DerivedCategory/KProjective.lean,Mathlib/Algebra/Homology/LeftResolution/Basic.lean,Mathlib/Algebra/Homology/Single.lean,Mathlib/Algebra/Homology/SpectralObject/Basic.lean,Mathlib/Algebra/Lie/Basis.lean,Mathlib/Algebra/Lie/Derivation/Killing.lean,Mathlib/Algebra/Lie/Nilpotent.lean,Mathlib/Algebra/Lie/Submodule.lean,Mathlib/Algebra/Lie/Weights/Chain.lean,Mathlib/Algebra/Lie/Weights/IsSimple.lean,Mathlib/Algebra/Lie/Weights/Killing.lean,Mathlib/Algebra/Lie/Weights/RootSystem.lean,Mathlib/Algebra/Module/FinitePresentation.lean,Mathlib/Algebra/Module/GradedModule.lean,Mathlib/Algebra/Module/LocalizedModule/Basic.lean,Mathlib/Algebra/Module/LocalizedModule/Int.lean,Mathlib/Algebra/Module/LocalizedModule/IsLocalization.lean,Mathlib/Algebra/Module/NatInt.lean,Mathlib/Algebra/Module/PID.lean,Mathlib/Algebra/Module/Presentation/Tensor.lean,Mathlib/Algebra/Module/SpanRank.lean,Mathlib/Algebra/Module/Torsion/Basic.lean,Mathlib/Algebra/Module/ZLattice/Basic.lean,Mathlib/Algebra/Module/ZLattice/Covolume.lean,Mathlib/Algebra/Module/ZLattice/Summable.lean,Mathlib/Algebra/MonoidAlgebra/Grading.lean,Mathlib/Algebra/MvPolynomial/Degrees.lean,Mathlib/Algebra/MvPolynomial/Equiv.lean,Mathlib/Algebra/MvPolynomial/Funext.lean,Mathlib/Algebra/Notation/Indicator.lean,Mathlib/Algebra/Order/Antidiag/Nat.lean,Mathlib/Algebra/Order/Field/Basic.lean,Mathlib/Algebra/Order/Hom/Monoid.lean,Mathlib/Algebra/Order/Hom/MonoidWithZero.lean,Mathlib/Algebra/Order/Hom/Ring.lean,Mathlib/Algebra/Order/Rearrangement.lean,Mathlib/Algebra/Polynomial/AlgebraMap.lean,Mathlib/Algebra/Polynomial/Basic.lean,Mathlib/Algebra/Polynomial/BigOperators.lean,Mathlib/Algebra/Polynomial/Degree/IsMonicOfDegree.lean,Mathlib/Algebra/Polynomial/Laurent.lean,Mathlib/Algebra/Polynomial/RingDivision.lean,Mathlib/Algebra/Ring/GeomSum.lean,Mathlib/Algebra/Ring/Parity.lean,Mathlib/Algebra/Ring/Subsemiring/Basic.lean,Mathlib/Algebra/SkewMonoidAlgebra/Basic.lean,Mathlib/Algebra/Star/TensorProduct.lean,Mathlib/Algebra/TrivSqZeroExt/Basic.lean,Mathlib/Algebra/Tropical/BigOperators.lean,Mathlib/AlgebraicGeometry/AffineScheme.lean,Mathlib/AlgebraicGeometry/AffineSpace.lean,Mathlib/AlgebraicGeometry/AffineTransitionLimit.lean 1186 22 ['JovanGerb', 'Vierkantor', 'github-actions', 'grunweg', 'joneugster', 'mathlib-dependent-issues', 'mathlib-merge-conflicts'] joneugster
assignee:joneugster
0-4504
1 hour ago
8-32707
8 days ago
0-8336
2 hours
37718 SabrinaJewson
author:SabrinaJewson
 feat(Order): add conversions from `Std` order typeclasses to Mathlib ones `{Preorder, PartialOrder, LinearOrder}.ofStd` exist to facilitate convenient translation from `Std` order typeclasses to Mathlib ones. The design is modelled closely after [`Init.Data.Order.PackageFactories`](https://leanprover-community.github.io/mathlib4_docs/Init/Data/Order/PackageFactories.html) (`Std.PreorderPackage` is equivalent-ish to Mathlib’s `Preorder`, and same for partial and linear orders). The `OfStdArgs` types allow conveniently bundling a whole bunch of default arguments together in a way that allows one default argument set to `extends` another. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-order new-contributor maintainer-merge 391/0 Mathlib.lean,Mathlib/Order/Std.lean,MathlibTest/OrderOfStd.lean 3 9 ['SabrinaJewson', 'YaelDillies', 'github-actions'] YaelDillies
assignee:YaelDillies
0-4496
1 hour ago
0-82692
22 hours ago
45-76745
45 days
36635 Vierkantor
author:Vierkantor
 chore(*): turn comments before declarations into docstrings This PR goes through the whole of Mathlib and replaces `/- comments -/` with `/-- docstrings -/` or `/-! module docs -/` whenever they appear before a declaration. A lot of these appear to be simple typos, where a docstring was actually intended. Where a comment was originally intended, I would argue it is still a good idea include the comments in the generated documentation, or at least it does not hurt anyone. These instances were found by a linter, in an upcoming PR: #36636. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) tech debt merge-conflict 253/260 Mathlib/Algebra/Algebra/Subalgebra/Basic.lean,Mathlib/Algebra/Category/ModuleCat/Abelian.lean,Mathlib/Algebra/Category/ModuleCat/Semi.lean,Mathlib/Algebra/DirectSum/Internal.lean,Mathlib/Algebra/Group/Defs.lean,Mathlib/Algebra/Group/Subgroup/MulOppositeLemmas.lean,Mathlib/Algebra/Group/Submonoid/Basic.lean,Mathlib/Algebra/Group/Submonoid/Membership.lean,Mathlib/Algebra/Group/Subsemigroup/Basic.lean,Mathlib/Algebra/GroupWithZero/Range.lean,Mathlib/Algebra/Order/Group/Unbundled/Basic.lean,Mathlib/Algebra/Order/GroupWithZero/Unbundled/Defs.lean,Mathlib/Algebra/Order/Monoid/Unbundled/Defs.lean,Mathlib/Algebra/Order/Ring/Star.lean,Mathlib/Algebra/Order/Sub/Defs.lean,Mathlib/Algebra/Polynomial/CoeffList.lean,Mathlib/Algebra/Ring/Ext.lean,Mathlib/Algebra/SkewMonoidAlgebra/Basic.lean,Mathlib/Algebra/Star/SelfAdjoint.lean,Mathlib/AlgebraicGeometry/Morphisms/RingHomProperties.lean,Mathlib/AlgebraicGeometry/Morphisms/WeaklyEtale.lean,Mathlib/Analysis/Analytic/Constructions.lean,Mathlib/Analysis/CStarAlgebra/Module/Constructions.lean,Mathlib/Analysis/CStarAlgebra/Module/Synonym.lean,Mathlib/Analysis/Calculus/ContDiff/FaaDiBruno.lean,Mathlib/Analysis/Complex/UpperHalfPlane/MoebiusAction.lean,Mathlib/Analysis/Convex/Function.lean,Mathlib/Analysis/Distribution/SchwartzSpace/Fourier.lean,Mathlib/Analysis/Distribution/TemperedDistribution.lean,Mathlib/Analysis/Fourier/Convolution.lean,Mathlib/Analysis/InnerProductSpace/Adjoint.lean,Mathlib/Analysis/InnerProductSpace/Orthogonal.lean,Mathlib/Analysis/InnerProductSpace/TensorProduct.lean,Mathlib/Analysis/LConvolution.lean,Mathlib/Analysis/LocallyConvex/WeakDual.lean,Mathlib/Analysis/Meromorphic/Basic.lean,Mathlib/Analysis/Normed/Algebra/GelfandMazur.lean,Mathlib/Analysis/Normed/Algebra/Unitization.lean,Mathlib/Analysis/Normed/Module/FiniteDimension.lean,Mathlib/Analysis/Normed/Module/MStructure.lean,Mathlib/Analysis/Normed/Operator/Banach.lean,Mathlib/Analysis/Normed/Operator/ContinuousAlgEquiv.lean,Mathlib/Analysis/RCLike/Basic.lean,Mathlib/Analysis/SpecialFunctions/Complex/Circle.lean,Mathlib/Analysis/SpecialFunctions/Trigonometric/Cotangent.lean,Mathlib/CategoryTheory/Action/Concrete.lean,Mathlib/CategoryTheory/Equivalence.lean,Mathlib/CategoryTheory/FintypeCat.lean,Mathlib/CategoryTheory/Iso.lean,Mathlib/CategoryTheory/Limits/Cones.lean,Mathlib/CategoryTheory/Limits/FintypeCat.lean,Mathlib/CategoryTheory/Limits/Shapes/BinaryBiproducts.lean,Mathlib/CategoryTheory/Limits/Shapes/Biproducts.lean,Mathlib/CategoryTheory/Monoidal/Closed/Ideal.lean,Mathlib/CategoryTheory/Products/Basic.lean,Mathlib/Combinatorics/Hindman.lean,Mathlib/Combinatorics/SimpleGraph/Hall.lean,Mathlib/Combinatorics/SimpleGraph/Walks/Counting.lean,Mathlib/Data/Complex/Basic.lean,Mathlib/Data/ENNReal/Holder.lean,Mathlib/Data/Finset/Sym.lean,Mathlib/Data/Fintype/Sets.lean,Mathlib/Data/Nat/Multiplicity.lean,Mathlib/Data/Set/Pointwise/Support.lean,Mathlib/Data/Set/Semiring.lean,Mathlib/Data/Sign/Defs.lean,Mathlib/FieldTheory/RatFunc/AsPolynomial.lean,Mathlib/Geometry/Euclidean/Volume/Measure.lean,Mathlib/GroupTheory/Coset/Defs.lean,Mathlib/GroupTheory/FreeGroup/IsFreeGroup.lean,Mathlib/GroupTheory/GroupAction/MultipleTransitivity.lean,Mathlib/GroupTheory/GroupAction/SubMulAction.lean,Mathlib/GroupTheory/OrderOfElement.lean,Mathlib/GroupTheory/OreLocalization/Basic.lean,Mathlib/GroupTheory/QuotientGroup/Defs.lean,Mathlib/GroupTheory/SpecificGroups/Alternating/MaximalSubgroups.lean,Mathlib/LinearAlgebra/CliffordAlgebra/SpinGroup.lean,Mathlib/LinearAlgebra/Complex/Module.lean,Mathlib/LinearAlgebra/DFinsupp.lean,Mathlib/LinearAlgebra/Isomorphisms.lean,Mathlib/LinearAlgebra/LinearIndependent/Lemmas.lean,Mathlib/LinearAlgebra/PiTensorProduct.lean,Mathlib/Logic/Basic.lean,Mathlib/Logic/UnivLE.lean,Mathlib/MeasureTheory/Constructions/BorelSpace/Basic.lean,Mathlib/MeasureTheory/Function/ConditionalLExpectation.lean,Mathlib/MeasureTheory/Function/JacobianOneDim.lean,Mathlib/MeasureTheory/Function/UniformIntegrable.lean,Mathlib/MeasureTheory/Group/Measure.lean,Mathlib/MeasureTheory/Integral/Lebesgue/Add.lean,Mathlib/MeasureTheory/MeasurableSpace/Constructions.lean,Mathlib/MeasureTheory/Measure/Haar/NormedSpace.lean,Mathlib/MeasureTheory/Measure/Haar/OfBasis.lean,Mathlib/MeasureTheory/Measure/ProbabilityMeasure.lean,Mathlib/ModelTheory/Algebra/Field/CharP.lean,Mathlib/NumberTheory/Chebyshev.lean,Mathlib/NumberTheory/NumberField/Cyclotomic/Basic.lean,Mathlib/Order/BooleanAlgebra/Basic.lean,Mathlib/Order/BourbakiWitt.lean,Mathlib/Order/CompleteLattice/Basic.lean 139 19 ['JovanGerb', 'Vierkantor', 'github-actions', 'grunweg', 'mathlib-merge-conflicts'] nobody
0-3949
1 hour ago
59-30718
59 days ago
2-9741
2 days
38714 YaelDillies
author:YaelDillies
 refactor(Algebra): make `MonoidAlgebra` into a one-field structure --- - [x] depends on: #26732 - [x] depends on: #28407 - [x] depends on: #28460 - [x] depends on: #28511 - [x] depends on: #29207 - [x] depends on: #30877 - [x] depends on: #31143 - [x] depends on: #31144 - [x] depends on: #32253 - [x] depends on: #32254 - [x] depends on: #32398 - [x] depends on: #32501 - [x] depends on: #32508 - [x] depends on: #32562 - [x] depends on: #32588 - [x] depends on: #32591 - [x] depends on: #32592 - [x] depends on: #32604 - [x] depends on: #32965 - [x] depends on: #33093 - [x] depends on: #33094 - [x] depends on: #33099 - [x] depends on: #33137 - [x] depends on: #33139 - [x] depends on: #33141 - [x] depends on: #33452 - [x] depends on: #33453 - [x] depends on: #33482 - [x] depends on: #33492 - [x] depends on: #36675 - [x] depends on: #36678 - [x] depends on: #36768 - [x] depends on: #36848 - [x] depends on: #36851 - [x] depends on: #37210 - [x] depends on: #37750 - [x] depends on: #37755 Port of #25273 to my fork [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra awaiting-CI
label:t-algebra$
 1884/1862 Mathlib/Algebra/FreeAlgebra/Cardinality.lean,Mathlib/Algebra/Lie/Loop.lean,Mathlib/Algebra/MonoidAlgebra/Basic.lean,Mathlib/Algebra/MonoidAlgebra/Cardinal.lean,Mathlib/Algebra/MonoidAlgebra/Defs.lean,Mathlib/Algebra/MonoidAlgebra/Degree.lean,Mathlib/Algebra/MonoidAlgebra/Division.lean,Mathlib/Algebra/MonoidAlgebra/Grading.lean,Mathlib/Algebra/MonoidAlgebra/Ideal.lean,Mathlib/Algebra/MonoidAlgebra/Lift.lean,Mathlib/Algebra/MonoidAlgebra/MapDomain.lean,Mathlib/Algebra/MonoidAlgebra/Module.lean,Mathlib/Algebra/MonoidAlgebra/NoZeroDivisors.lean,Mathlib/Algebra/MonoidAlgebra/Opposite.lean,Mathlib/Algebra/MonoidAlgebra/PointwiseSMul.lean,Mathlib/Algebra/MonoidAlgebra/Support.lean,Mathlib/Algebra/MonoidAlgebra/ToDirectSum.lean,Mathlib/Algebra/MvPolynomial/Basic.lean,Mathlib/Algebra/MvPolynomial/Cardinal.lean,Mathlib/Algebra/MvPolynomial/CommRing.lean,Mathlib/Algebra/MvPolynomial/Degrees.lean,Mathlib/Algebra/MvPolynomial/Derivation.lean,Mathlib/Algebra/MvPolynomial/Division.lean,Mathlib/Algebra/MvPolynomial/Equiv.lean,Mathlib/Algebra/MvPolynomial/Eval.lean,Mathlib/Algebra/MvPolynomial/Funext.lean,Mathlib/Algebra/MvPolynomial/Monad.lean,Mathlib/Algebra/MvPolynomial/PDeriv.lean,Mathlib/Algebra/MvPolynomial/Rename.lean,Mathlib/Algebra/MvPolynomial/Supported.lean,Mathlib/Algebra/Polynomial/Basic.lean,Mathlib/Algebra/Polynomial/Basis.lean,Mathlib/Algebra/Polynomial/Cardinal.lean,Mathlib/Algebra/Polynomial/Coeff.lean,Mathlib/Algebra/Polynomial/Degree/Defs.lean,Mathlib/Algebra/Polynomial/Derivative.lean,Mathlib/Algebra/Polynomial/Eval/Coeff.lean,Mathlib/Algebra/Polynomial/HasseDeriv.lean,Mathlib/Algebra/Polynomial/Homogenize.lean,Mathlib/Algebra/Polynomial/Laurent.lean,Mathlib/Algebra/Polynomial/Module/Basic.lean,Mathlib/Algebra/Polynomial/OfFn.lean,Mathlib/Algebra/Polynomial/Reverse.lean,Mathlib/Algebra/Polynomial/UnitTrinomial.lean,Mathlib/Algebra/Ring/Subring/IntPolynomial.lean,Mathlib/Analysis/Fourier/BoundedContinuousFunctionChar.lean,Mathlib/Data/Finsupp/Basic.lean,Mathlib/FieldTheory/Finite/Polynomial.lean,Mathlib/FieldTheory/SeparablyGenerated.lean,Mathlib/LinearAlgebra/Finsupp/VectorSpace.lean,Mathlib/LinearAlgebra/FreeAlgebra.lean,Mathlib/LinearAlgebra/SymmetricAlgebra/Basis.lean,Mathlib/MeasureTheory/Measure/CharacteristicFunction/Basic.lean,Mathlib/MeasureTheory/Measure/LevyConvergence.lean,Mathlib/NumberTheory/BernoulliPolynomials.lean,Mathlib/NumberTheory/Height/MvPolynomial.lean,Mathlib/RepresentationTheory/Action.lean,Mathlib/RepresentationTheory/Basic.lean,Mathlib/RepresentationTheory/Coinduced.lean,Mathlib/RepresentationTheory/Equiv.lean,Mathlib/RepresentationTheory/Invariants.lean,Mathlib/RepresentationTheory/Rep/Basic.lean,Mathlib/RepresentationTheory/Rep/Iso.lean,Mathlib/RingTheory/Coalgebra/MonoidAlgebra.lean,Mathlib/RingTheory/Derivation/MapCoeffs.lean,Mathlib/RingTheory/Extension/Cotangent/Basis.lean,Mathlib/RingTheory/Extension/Generators.lean,Mathlib/RingTheory/Extension/Presentation/Basic.lean,Mathlib/RingTheory/Filtration.lean,Mathlib/RingTheory/FinitePresentation.lean,Mathlib/RingTheory/FiniteType.lean,Mathlib/RingTheory/Finiteness/Finsupp.lean,Mathlib/RingTheory/HopfAlgebra/MonoidAlgebra.lean,Mathlib/RingTheory/IsAdjoinRoot.lean,Mathlib/RingTheory/Kaehler/JacobiZariski.lean,Mathlib/RingTheory/MvPolynomial/Basic.lean,Mathlib/RingTheory/MvPolynomial/EulerIdentity.lean,Mathlib/RingTheory/MvPolynomial/FreeCommRing.lean,Mathlib/RingTheory/MvPolynomial/Homogeneous.lean,Mathlib/RingTheory/MvPolynomial/Ideal.lean,Mathlib/RingTheory/MvPolynomial/IrreducibleQuadratic.lean,Mathlib/RingTheory/MvPolynomial/Symmetric/Defs.lean,Mathlib/RingTheory/MvPolynomial/WeightedHomogeneous.lean,Mathlib/RingTheory/MvPowerSeries/Trunc.lean,Mathlib/RingTheory/Polynomial/Basic.lean,Mathlib/RingTheory/Polynomial/IsIntegral.lean,Mathlib/RingTheory/Polynomial/Opposites.lean,Mathlib/RingTheory/PowerBasis.lean,Mathlib/RingTheory/Spectrum/Prime/Polynomial.lean,Mathlib/RingTheory/TensorProduct/MonoidAlgebra.lean,Mathlib/RingTheory/TensorProduct/MvPolynomial.lean,Mathlib/RingTheory/WittVector/StructurePolynomial.lean 92 24 ['Vierkantor', 'Whysoserioushah', 'YaelDillies', 'github-actions', 'mathlib-dependent-issues', 'mathlib-merge-conflicts', 'riccardobrasca'] nobody
0-3697
1 hour ago
23-27682
23 days ago
0-788
13 minutes
36636 Vierkantor
author:Vierkantor
 feat(Tactic/Linter): linter for comments that should become docstrings This PR adds a linter that warns when there is a comment before a declaration which could become a docstring instead. A lot of the instances it spots appear to be simple typos, where a docstring was actually intended. Where a comment was originally intended, I would argue it is still a good idea include the comments in the generated documentation, or at least it does not hurt anyone. Closes: https://github.com/mathlib-initiative/TaskList/issues/41 --- - [ ] depends on: #36635 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-linter blocked-by-other-PR merge-conflict 312/260 Mathlib/Algebra/Algebra/Subalgebra/Basic.lean,Mathlib/Algebra/Category/ModuleCat/Abelian.lean,Mathlib/Algebra/Category/ModuleCat/Semi.lean,Mathlib/Algebra/DirectSum/Internal.lean,Mathlib/Algebra/Group/Defs.lean,Mathlib/Algebra/Group/Subgroup/MulOppositeLemmas.lean,Mathlib/Algebra/Group/Submonoid/Basic.lean,Mathlib/Algebra/Group/Submonoid/Membership.lean,Mathlib/Algebra/Group/Subsemigroup/Basic.lean,Mathlib/Algebra/GroupWithZero/Range.lean,Mathlib/Algebra/Order/Group/Unbundled/Basic.lean,Mathlib/Algebra/Order/GroupWithZero/Unbundled/Defs.lean,Mathlib/Algebra/Order/Monoid/Unbundled/Defs.lean,Mathlib/Algebra/Order/Ring/Star.lean,Mathlib/Algebra/Order/Sub/Defs.lean,Mathlib/Algebra/Polynomial/CoeffList.lean,Mathlib/Algebra/Ring/Ext.lean,Mathlib/Algebra/SkewMonoidAlgebra/Basic.lean,Mathlib/Algebra/Star/SelfAdjoint.lean,Mathlib/AlgebraicGeometry/Morphisms/RingHomProperties.lean,Mathlib/AlgebraicGeometry/Morphisms/WeaklyEtale.lean,Mathlib/Analysis/Analytic/Constructions.lean,Mathlib/Analysis/CStarAlgebra/Module/Constructions.lean,Mathlib/Analysis/CStarAlgebra/Module/Synonym.lean,Mathlib/Analysis/Calculus/ContDiff/FaaDiBruno.lean,Mathlib/Analysis/Complex/UpperHalfPlane/MoebiusAction.lean,Mathlib/Analysis/Convex/Function.lean,Mathlib/Analysis/Distribution/SchwartzSpace/Fourier.lean,Mathlib/Analysis/Distribution/TemperedDistribution.lean,Mathlib/Analysis/Fourier/Convolution.lean,Mathlib/Analysis/InnerProductSpace/Adjoint.lean,Mathlib/Analysis/InnerProductSpace/Orthogonal.lean,Mathlib/Analysis/InnerProductSpace/TensorProduct.lean,Mathlib/Analysis/LConvolution.lean,Mathlib/Analysis/LocallyConvex/WeakDual.lean,Mathlib/Analysis/Meromorphic/Basic.lean,Mathlib/Analysis/Normed/Algebra/GelfandMazur.lean,Mathlib/Analysis/Normed/Algebra/Unitization.lean,Mathlib/Analysis/Normed/Module/FiniteDimension.lean,Mathlib/Analysis/Normed/Module/MStructure.lean,Mathlib/Analysis/Normed/Operator/Banach.lean,Mathlib/Analysis/Normed/Operator/ContinuousAlgEquiv.lean,Mathlib/Analysis/RCLike/Basic.lean,Mathlib/Analysis/SpecialFunctions/Complex/Circle.lean,Mathlib/Analysis/SpecialFunctions/Trigonometric/Cotangent.lean,Mathlib/CategoryTheory/Action/Concrete.lean,Mathlib/CategoryTheory/Equivalence.lean,Mathlib/CategoryTheory/FintypeCat.lean,Mathlib/CategoryTheory/Iso.lean,Mathlib/CategoryTheory/Limits/Cones.lean,Mathlib/CategoryTheory/Limits/FintypeCat.lean,Mathlib/CategoryTheory/Limits/Shapes/BinaryBiproducts.lean,Mathlib/CategoryTheory/Limits/Shapes/Biproducts.lean,Mathlib/CategoryTheory/Monoidal/Closed/Ideal.lean,Mathlib/CategoryTheory/Products/Basic.lean,Mathlib/Combinatorics/Hindman.lean,Mathlib/Combinatorics/SimpleGraph/Connectivity/WalkCounting.lean,Mathlib/Combinatorics/SimpleGraph/Hall.lean,Mathlib/Data/Complex/Basic.lean,Mathlib/Data/ENNReal/Holder.lean,Mathlib/Data/Finset/Sym.lean,Mathlib/Data/Fintype/Sets.lean,Mathlib/Data/Nat/Multiplicity.lean,Mathlib/Data/Set/Pointwise/Support.lean,Mathlib/Data/Set/Semiring.lean,Mathlib/Data/Sign/Defs.lean,Mathlib/FieldTheory/RatFunc/AsPolynomial.lean,Mathlib/Geometry/Euclidean/Volume/Measure.lean,Mathlib/GroupTheory/Coset/Defs.lean,Mathlib/GroupTheory/FreeGroup/IsFreeGroup.lean,Mathlib/GroupTheory/GroupAction/MultipleTransitivity.lean,Mathlib/GroupTheory/GroupAction/SubMulAction.lean,Mathlib/GroupTheory/OrderOfElement.lean,Mathlib/GroupTheory/OreLocalization/Basic.lean,Mathlib/GroupTheory/QuotientGroup/Defs.lean,Mathlib/GroupTheory/SpecificGroups/Alternating/MaximalSubgroups.lean,Mathlib/Init.lean,Mathlib/LinearAlgebra/CliffordAlgebra/SpinGroup.lean,Mathlib/LinearAlgebra/Complex/Module.lean,Mathlib/LinearAlgebra/DFinsupp.lean,Mathlib/LinearAlgebra/Isomorphisms.lean,Mathlib/LinearAlgebra/LinearIndependent/Lemmas.lean,Mathlib/LinearAlgebra/PiTensorProduct.lean,Mathlib/Logic/Basic.lean,Mathlib/Logic/UnivLE.lean,Mathlib/MeasureTheory/Constructions/BorelSpace/Basic.lean,Mathlib/MeasureTheory/Function/ConditionalLExpectation.lean,Mathlib/MeasureTheory/Function/JacobianOneDim.lean,Mathlib/MeasureTheory/Function/UniformIntegrable.lean,Mathlib/MeasureTheory/Group/Measure.lean,Mathlib/MeasureTheory/Integral/Lebesgue/Add.lean,Mathlib/MeasureTheory/MeasurableSpace/Constructions.lean,Mathlib/MeasureTheory/Measure/Haar/NormedSpace.lean,Mathlib/MeasureTheory/Measure/Haar/OfBasis.lean,Mathlib/MeasureTheory/Measure/ProbabilityMeasure.lean,Mathlib/ModelTheory/Algebra/Field/CharP.lean,Mathlib/NumberTheory/Chebyshev.lean,Mathlib/NumberTheory/NumberField/Cyclotomic/Basic.lean,Mathlib/Order/BooleanAlgebra/Basic.lean,Mathlib/Order/BourbakiWitt.lean 142 8 ['adomani', 'github-actions', 'grunweg', 'jcommelin', 'mathlib-bors', 'mathlib-dependent-issues', 'mathlib-merge-conflicts'] nobody
0-2692
44 minutes ago
69-40475
69 days ago
0-45
45 seconds
39707 sorrachai
author:sorrachai
 chore(Data/Tree/Basic): Rename Tree to BinaryTree Rename `Tree` to `BinaryTree`. This frees up the name `Tree` to cover n-ary trees in future. We only deprecate the `def`s, and move the theorems without deprecation. new-contributor 145/63 Mathlib/Combinatorics/Enumerative/Catalan/Tree.lean,Mathlib/Combinatorics/Enumerative/DyckWord.lean,Mathlib/Data/Tree/Basic.lean,Mathlib/Data/Tree/Get.lean,Mathlib/Data/Tree/Traversable.lean,Mathlib/Tactic/CancelDenoms/Core.lean,docs/overview.yaml 7 28 ['eric-wieser', 'github-actions', 'sorrachai'] nobody
0-2614
43 minutes ago
0-2777
41 minutes ago
0-13404
3 hours
39629 hawkrobe
author:hawkrobe
 feat(RingTheory/Coalgebra/Convolution): Algebra on convolution semiring --- I tried to follow the pattern in [`Matrix/WithConv.lean`](https://github.com/leanprover-community/mathlib4/blob/5e932f97dd25535344f80f9dd8da3aab83df0fe6/Mathlib/LinearAlgebra/Matrix/WithConv.lean#L98) which splits out `IsScalarTower` and `SMulCommClass`. ~It seems liked it should be generalized eventually but R-specialized seemed better as a first PR since there would need to be a bigger discussion?~ Just kidding, I updated to try to generalize. t-ring-theory new-contributor 30/1 Mathlib/RingTheory/Coalgebra/Convolution.lean 1 2 ['github-actions'] nobody
0-2428
40 minutes ago
2-8982
2 days ago
2-8693
2 days
39602 b-mehta
author:b-mehta
 chore(Mathlib/Tactic): stop norm_num importing the Bochner integral Motivation: importing `Mathlib.Tactic.NormNum` shouldn't require use to build the Bochner integral and fundamental theorem of algebra. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) tech debt 36/22 Mathlib.lean,Mathlib/Analysis/SpecialFunctions/Complex/CircleAddChar.lean,Mathlib/NumberTheory/LegendreSymbol/AddCharacter.lean,Mathlib/NumberTheory/LegendreSymbol/Cyclotomic.lean 4 13 ['adomani', 'b-mehta', 'github-actions', 'grunweg', 'leanprover-radar'] grunweg
assignee:grunweg
0-1982
33 minutes ago
0-75134
20 hours ago
1-43459
1 day
39723 VictorBoscaro
author:VictorBoscaro
 feat(Analysis): add Commute.exp_smul_right and symmetric variants ## Summary Adds `Commute.exp_smul_right`, `Commute.exp_smul_left`, and `Commute.exp_smul` to `Mathlib/Analysis/Normed/Algebra/Exponential.lean`, immediately after `Commute.exp`. One-line compositions of `Commute.smul_*` with `Commute.exp_*`. Same typeclass scope as `Commute.exp_right`; no new hypotheses. ## Context `Commute.exp_right` / `Commute.exp_left` / `Commute.exp` handle the `Commute x (exp y)` shape; `Commute.smul_right` / `Commute.smul_left` handle `Commute x (r • y)`. The natural composition `Commute x (exp (r • y))` — the canonical shape in one-parameter semigroups `t ↦ exp (t • Q)` — is absent and currently requires inline chaining. ## Notes - One-line proofs; same typeclass scope as `Commute.exp_right`. - No `@[simp]` / no `@[to_additive]` — matches the existing `Commute.exp_*` choices. - API minimal — `exp_smul_self`, `exp_nsmul_*` can follow separately if needed. ## Where this can be used **Existing Mathlib — concrete simplifications.** `Mathlib/Analysis/SpecialFunctions/Exponential.lean:292, 313` write the chain explicitly: `(((Commute.refl x).smul_left t').smul_right t).exp_right` would compress to `((Commute.refl x).smul_left t').exp_smul_right t`. `Mathlib/Analysis/CStarAlgebra/Fuglede.lean:76` uses `grind [exp_add_of_commute, Commute.smul_right, Commute.neg_right]` to discharge a commutation goal in the Fuglede–Putnam–Rosenblum proof; these lemmas would be natural additions to that hint set. **Areas where this composition recurs.** The composition `[P, Q] = 0 ⟹ [P, exp(t · Q)] = 0` appears in: | Area | Where the composition appears | |---|---| | **Strongly continuous semigroups** (Hille–Yosida) | `P` commutes with the infinitesimal generator `Q` ⟹ `P` commutes with `e^{tQ}`. | | **Stone's theorem** | One-parameter unitary groups `U(t) = exp(itA)`; commuting observables commute with the full evolution. | | **Markov semigroups** | `M_t = exp(tQ)` for `Q` a Q-matrix; symmetries of `Q` lift to symmetries of `M_t`. | | **Lie group exponential** | `X`, `Y` commuting in the Lie algebra ⟹ `exp(tX)`, `exp(sY)` commute. | | **Functional calculus** | `f(A)g(A) = g(A)f(A)` for commuting operators, with the exp specialisation at each step. | | **PDE flows** | Heat / Schrödinger evolution: conservation laws are commutation with `exp(t·Δ)` / `exp(-itH)`. | | **Tomita–Takesaki** | The modular automorphism group `σ^φ_t = Ad(Δ^{it})` on a von Neumann algebra. | t-analysis new-contributor 12/0 Mathlib/Analysis/Normed/Algebra/Exponential.lean 1 2 ['github-actions'] nobody
0-1444
24 minutes ago
0-1518
20 minutes ago
0-1229
20 minutes
38126 JovanGerb
author:JovanGerb
 feat: overlapping instances linter This PR implements the overlapping instances linter, with better performance than the previous attempt. An annoyance is the need for `withSetBoolOptionIn`. This is a private declaration in the `unusedInstancesInType` linter, with a link to an unsolved issue. I've marked it public, but maybe it should go to a separate file, depending on how fast we think the issue will be resolved. See #35095 and #34955 for previous iterations of this linter. See #14731 for an old attempt at a weaker form of this linter. Co-authored-by: @thorimur --- - [x] depends on: #38151 - [x] depends on: #38150 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-linter 753/52 Mathlib.lean,Mathlib/Algebra/Category/Ring/FilteredColimits.lean,Mathlib/Algebra/Colimit/DirectLimit.lean,Mathlib/Algebra/Homology/HomotopyFiber.lean,Mathlib/Algebra/Module/DedekindDomain.lean,Mathlib/Algebra/Module/Equiv/Defs.lean,Mathlib/Algebra/Module/GradedModule.lean,Mathlib/Algebra/Order/Antidiag/Prod.lean,Mathlib/Algebra/Order/Invertible.lean,Mathlib/Algebra/Polynomial/Div.lean,Mathlib/Algebra/Star/StarRingHom.lean,Mathlib/Analysis/CStarAlgebra/Spectrum.lean,Mathlib/Analysis/Convex/StdSimplex.lean,Mathlib/Analysis/Fourier/FiniteAbelian/Orthogonality.lean,Mathlib/Analysis/Normed/Field/Krasner.lean,Mathlib/Analysis/SpecialFunctions/ContinuousFunctionalCalculus/Rpow/ConjSqrt.lean,Mathlib/Analysis/SpecificLimits/Normed.lean,Mathlib/CategoryTheory/Localization/Predicate.lean,Mathlib/CategoryTheory/Monoidal/Closed/Cartesian.lean,Mathlib/CategoryTheory/MorphismProperty/OverAdjunction.lean,Mathlib/CategoryTheory/Triangulated/LocalizingSubcategory.lean,Mathlib/Control/Applicative.lean,Mathlib/Control/Functor.lean,Mathlib/FieldTheory/Normal/Defs.lean,Mathlib/GroupTheory/OreLocalization/Basic.lean,Mathlib/Init.lean,Mathlib/Lean/Elab/InfoTree.lean,Mathlib/LinearAlgebra/BilinearForm/Orthogonal.lean,Mathlib/LinearAlgebra/Eigenspace/Matrix.lean,Mathlib/LinearAlgebra/RootSystem/Finite/G2.lean,Mathlib/LinearAlgebra/RootSystem/GeckConstruction/Lemmas.lean,Mathlib/LinearAlgebra/SesquilinearForm/Basic.lean,Mathlib/Logic/Basic.lean,Mathlib/MeasureTheory/Measure/Haar/Unique.lean,Mathlib/NumberTheory/ClassNumber/Finite.lean,Mathlib/NumberTheory/NumberField/InfinitePlace/Embeddings.lean,Mathlib/NumberTheory/RamificationInertia/Galois.lean,Mathlib/RingTheory/ChainOfDivisors.lean,Mathlib/RingTheory/ClassGroup.lean,Mathlib/RingTheory/DedekindDomain/Different.lean,Mathlib/RingTheory/DedekindDomain/Dvr.lean,Mathlib/RingTheory/DedekindDomain/Ideal/Lemmas.lean,Mathlib/RingTheory/DedekindDomain/Instances.lean,Mathlib/RingTheory/DedekindDomain/IntegralClosure.lean,Mathlib/RingTheory/DedekindDomain/LinearDisjoint.lean,Mathlib/RingTheory/DiscreteValuationRing/TFAE.lean,Mathlib/RingTheory/FractionalIdeal/Extended.lean,Mathlib/RingTheory/HahnSeries/Lex.lean,Mathlib/RingTheory/Ideal/Norm/AbsNorm.lean,Mathlib/RingTheory/Ideal/Norm/RelNorm.lean,Mathlib/RingTheory/LocalRing/ResidueField/Instances.lean,Mathlib/RingTheory/NormalClosure.lean,Mathlib/RingTheory/Valuation/RankOne.lean,Mathlib/Tactic.lean,Mathlib/Tactic/Linter/DirectoryDependency.lean,Mathlib/Tactic/Linter/OverlappingInstances.lean,Mathlib/Tactic/Linter/TextBased/UnicodeLinter.lean,Mathlib/Tactic/Linter/UnusedInstancesInType.lean,Mathlib/Tactic/NormNum/Ineq.lean,Mathlib/Topology/Algebra/MulAction.lean,Mathlib/Topology/Algebra/Nonarchimedean/Completion.lean,Mathlib/Topology/Connected/PathConnected.lean,MathlibTest/OverlappingInstances.lean,MathlibTest/Subsingleton.lean,MathlibTest/Variable.lean,MathlibTest/WhitespaceLinter.lean,MathlibTest/congr.lean,MathlibTest/norm_num.lean 68 104 ['JovanGerb', 'github-actions', 'leanprover-radar', 'mathlib-dependent-issues', 'mathlib-merge-conflicts', 'thorimur'] thorimur
assignee:thorimur
0-1369
22 minutes ago
0-2188
31 minutes ago
21-77076
21 days

Other lists of PRs

Some other lists of PRs which could be useful:

PRs from a branch of the main mathlib repo

Number Author Title Description Labels +/- Modified files (first 100) 📝 💬 All users who commented or reviewed Assignee(s) Updated Last status change total time in review
13847 alreadydone
author:alreadydone
 feat(EllipticCurve): the universal elliptic curve + Define the universal Weierstrass curve (`Universal.curve`) over the polynomial ring `ℤ[A₁,A₂,A₃,A₄,A₆]`, and the universal pointed elliptic curve (`Universal.pointedCurve`) over the field of fractions (`Universal.Field`) of the universal ring `ℤ[A₁,A₂,A₃,A₄,A₆,X,Y]/⟨P⟩ = Universal.Poly/⟨P⟩` (`Universal.Ring`, where `P` is the Weierstrass polynomial) with distinguished point `(X,Y)`. + Given a Weierstrass curve `W` over a commutative ring `R`, we define the specialization homomorphism `W.specialize : ℤ[A₁,A₂,A₃,A₄,A₆] →+* R`. If `(x,y)` is a point on the affine plane, we define `W.polyEval x y : Universal.Poly →+* R`, which factors through `W.ringEval x y : Universal.Ring →+* R` if `(x,y)` is on `W`. + Introduce the cusp curve `Y² = X³`, on which lies the rational point `(1,1)`, with the nice property that `ψₙ(1,1) = n`, making it easy to prove nonvanishing of the universal `ψₙ` when `n ≠ 0` by specializing to the cusp curve, which shows that `(X,Y)` is a point of infinite order on the universal pointed elliptic curve. --- - [x] depends on: #13845 - [x] depends on: #12883 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict awaiting-author t-algebra t-algebraic-geometry
label:t-algebra$
 543/208 Mathlib.lean,Mathlib/Algebra/Polynomial/Bivariate.lean,Mathlib/AlgebraicGeometry/EllipticCurve/Affine.lean,Mathlib/AlgebraicGeometry/EllipticCurve/Group.lean,Mathlib/AlgebraicGeometry/EllipticCurve/Jacobian.lean,Mathlib/AlgebraicGeometry/EllipticCurve/Universal.lean 6 4 ['Multramate', 'alreadydone', 'github-actions', 'leanprover-community-mathlib4-bot'] nobody
660-49756
1 year ago
unknown
0-0
0 seconds
13297 urkud
author:urkud
 feat(Semicontinuous): add `comp` lemma --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict awaiting-author t-topology t-order 31/13 Mathlib/Topology/Semicontinuous.lean 1 3 ['sgouezel', 'urkud'] nobody
660-49755
1 year ago
724-50453
724 days ago
0-18201
5 hours
12608 eric-wieser
author:eric-wieser
 feat: allow `nsmul` / `zsmul` to be omitted again, with a warning --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict awaiting-author t-algebra t-meta
label:t-algebra$
 118/2 Mathlib.lean,Mathlib/Algebra/Group/Defs.lean,Mathlib/Tactic.lean,Mathlib/Tactic/DefaultFieldLinter.lean,scripts/noshake.json,test/default_field_linter.lean 6 12 ['YaelDillies', 'eric-wieser', 'fpvandoorn', 'github-actions'] nobody
660-49754
1 year ago
749-82173
749 days ago
0-84
1 minute
12679 MichaelStollBayreuth
author:MichaelStollBayreuth
 perf(NumberTheory/RamificationInertia): speed up slow file A repetition of the earlier experiment at [#12412](https://github.com/leanprover-community/mathlib4/pull/12412) with Lean 4.8.0-rc1. This time, I tried not to introduce local instances if possible, but instead to tweak instance priorities. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict WIP 57/14 Mathlib/NumberTheory/RamificationInertia.lean 1 3 ['MichaelStollBayreuth', 'github-actions', 'leanprover-bot'] nobody
660-49754
1 year ago
unknown
0-0
0 seconds
13057 alreadydone
author:alreadydone
 feat(NumberTheory): characterize elliptic divisibility sequences Main results: + Every `normEDS` is an elliptic divisibility sequence (EDS). The key proof is `rel₄_of_anti_oddRec_evenRec`, based on my original argument first published on [MathSE](https://math.stackexchange.com/a/4903422/12932) + Conversely, every EDS is equal to some `normEDS` (assuming that the first two terms are not zero divisors) --- - [ ] depends on: #13155 - [x] depends on: #13153 - [x] depends on: #10843 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-algebra t-number-theory blocked-by-other-PR
label:t-algebra$
 1032/55 Mathlib/Algebra/Ring/NegOnePow.lean,Mathlib/Data/Int/Defs.lean,Mathlib/Data/Int/Parity.lean,Mathlib/GroupTheory/Perm/Sign.lean,Mathlib/NumberTheory/EllipticDivisibilitySequence.lean 5 6 ['Multramate', 'alreadydone', 'kbuzzard', 'leanprover-community-mathlib4-bot'] nobody
660-49754
1 year ago
728-74182
728 days ago
0-34672
9 hours
12192 Ruben-VandeVelde
author:Ruben-VandeVelde
 feat: generalize isLittleO_const_id_atTop/atBot From PNT+. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict awaiting-author t-analysis 10/4 Mathlib/Analysis/Asymptotics/Asymptotics.lean 1 6 ['Ruben-VandeVelde', 'llllvvuu', 'urkud'] nobody
660-49753
1 year ago
764-71849
764 days ago
1-21749
1 day
10024 ADedecker
author:ADedecker
 feat: rename `connectedComponentOfOne` to `identityComponent`, prove that it is normal and open --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-topology awaiting-CI 58/24 Mathlib/FieldTheory/AbsoluteGaloisGroup.lean,Mathlib/Topology/Algebra/Group/Basic.lean,Mathlib/Topology/Algebra/Group/TopologicalAbelianization.lean,Mathlib/Topology/Algebra/OpenSubgroup.lean,Mathlib/Topology/Connected/Basic.lean 5 0 [] nobody
660-49752
1 year ago
847-41876
847 days ago
0-832
13 minutes
10521 eric-wieser
author:eric-wieser
 chore: generalize `IsBoundedLinearMap` to modules Most of the lemmas don't actually need the normed on the scalars at all. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict awaiting-author t-analysis 58/42 Mathlib/Analysis/NormedSpace/BoundedLinearMaps.lean 1 3 ['github-actions', 'j-loreaux', 'urkud'] nobody
660-49752
1 year ago
827-17802
827 days ago
1-29105
1 day
10721 urkud
author:urkud
 feat(Order/FunLike): define `PointwiseLE` - introduce a mixin class `DFunLike.PointwiseLE`, use it to define `DFunLike.instPartialOrder`; - add a generic `DFunLike.orderEmbeddingCoe` - add `DFunLike.PointwiseLE` instances here and there. With this refactor and #13022, I'm going to generalize lemmas like `MeasureTheory.ae_mono` to `OuterMeasureClass`. --- - [x] depends on: #12983 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-order t-logic 123/50 Mathlib.lean,Mathlib/Algebra/Order/Hom/Ring.lean,Mathlib/Data/DFinsupp/Order.lean,Mathlib/Data/Finsupp/Order.lean,Mathlib/Data/FunLike/Basic.lean,Mathlib/Dynamics/Circle/RotationNumber/TranslationNumber.lean,Mathlib/GroupTheory/Congruence.lean,Mathlib/Order/FunLike.lean,Mathlib/Order/Heyting/Hom.lean,Mathlib/Order/Hom/Basic.lean,Mathlib/Order/Hom/Bounded.lean,Mathlib/Order/Hom/CompleteLattice.lean,Mathlib/Topology/Order/Hom/Basic.lean 13 48 ['YaelDillies', 'dupuisf', 'leanprover-community-mathlib4-bot', 'urkud'] nobody
660-49752
1 year ago
710-28154
710 days ago
64-12984
64 days
11100 eric-wieser
author:eric-wieser
 feat(CategoryTheory/Limits): add `Functor.mapBinaryBiconeInv` --- - [ ] depends on: #11130 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) It's tempting to try to prove something like ```lean theorem Functor.mapBinaryBiconeInv_toCone [Limits.HasZeroMorphisms C] [Limits.HasZeroMorphisms D] (e : D ⥤ C) [IsEquivalence e] {X Y : D} (b : BinaryBicone (e.obj X) (e.obj Y)) : (e.mapBinaryBiconeInv b).toCone = (e.mapConeInv <| (Cones.postcompose (pairComp X Y e).symm.hom).obj b.toCone) := by simp sorry theorem Functor.mapBinaryBiconeInv_toCocone [Limits.HasZeroMorphisms C] [Limits.HasZeroMorphisms D] (e : D ⥤ C) [IsEquivalence e] {X Y : D} (b : BinaryBicone (e.obj X) (e.obj Y)) : (e.mapBinaryBiconeInv b).toCocone = (e.mapCoconeInv <| (Cocones.precompose (pairComp X Y e).hom).obj b.toCocone) := by sorry ``` but maybe equality is evil here merge-conflict t-category-theory awaiting-CI 52/0 Mathlib/CategoryTheory/Adjunction/Basic.lean,Mathlib/CategoryTheory/Equivalence.lean,Mathlib/CategoryTheory/Limits/Preserves/Shapes/Biproducts.lean 3 6 ['TwoFX', 'eric-wieser', 'leanprover-community-mathlib4-bot'] nobody
660-49752
1 year ago
unknown
0-0
0 seconds
8503 thorimur
author:thorimur
 feat: meta utils for `refine?` This PR introduces some metaprogramming infrastructure and utilities that are necessary for `refine?` (#8364). * `elabTermWithHoles'` (and `withCollectingNewGoalsFrom'`): a more configurable version of `elabTermWithHoles`, which allows: preserving the initial mvar type; *not* tagging untagged goals; and postponing mvars. * Some `Syntax` and `TSyntax` functionality, including: * `TSyntax.map`(`M`), for acting on `TSyntax` with functions `f : Syntax -> (m) Syntax` * Range operations: `includes` and `isEqByRange` * `setTrailingInfoBy?` and `unsetOriginalTrailing`, which is like `unsetTrailing`, but behaves as expected. * `Term.withoutModifyingState`, which does not allow unknown mvarIds to escape via the infotree * `hasNewErrors`, which runs a monad computation and returns the value along with `true` or `false` depending on whether new error messages have been logged * the option `pp.anonymousMVarSuffixes`, which can be set to `false` to replace all numeric suffixes of anonymous mvars with `✝`, which is useful in tandem with `#guard_msgs` for tests (but is essentially a workaround—although it can make some tactic states more legible). --- I'm open to suggestions on the location and name of the option/delaborator used for trimming the numeric suffixes of anonymous mvar names (which is used in the tests)—including whether or not it should exist in the first place, as it's essentially just a workaround. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict awaiting-author t-meta 312/5 Mathlib.lean,Mathlib/Lean/CoreM.lean,Mathlib/Lean/Elab/Tactic/ElabTerm.lean,Mathlib/Lean/Elab/Term.lean,Mathlib/Util/Delaborators.lean,Mathlib/Util/Syntax.lean 6 2 ['kmill', 'thorimur'] kmill
assignee:kmill
660-49751
1 year ago
877-22075
877 days ago
38-46649
38 days
8519 eric-wieser
author:eric-wieser
 refactor(LinearAlgebra/TensorProduct): golf using `liftAddHom` This new `TensorProduct.liftAddHom` doesn't require bilinearity, only that scalar multiplication can be moved between the arguments. While in theory we only need the `AddMonoidHom` version as it offers exactly the same generality, we first provide an unbundled `liftFun` as this seems to give a sizeable performance boost if used in downstream `lift` variants. --- - [x] depends on: #8571 - [x] depends on: #8584 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict awaiting-author t-algebra
label:t-algebra$
 53/50 Mathlib/Algebra/Category/AlgebraCat/Monoidal.lean,Mathlib/LinearAlgebra/TensorProduct.lean,Mathlib/LinearAlgebra/TensorProduct/Tower.lean 3 28 ['bustercopley', 'eric-wieser', 'jcommelin', 'jjaassoonn', 'leanprover-bot', 'leanprover-community-mathlib4-bot', 'mathlib-bors'] nobody
660-49751
1 year ago
900-15114
900 days ago
5-6524
5 days
8616 eric-wieser
author:eric-wieser
 feat(Algebra/FreeAlgebra): add right action and `IsCentralScalar` --- - [ ] depends on: #8652 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-algebra awaiting-CI
label:t-algebra$
 30/8 Mathlib/Algebra/FreeAlgebra.lean 1 1 ['leanprover-community-mathlib4-bot'] nobody
660-49751
1 year ago
907-83693
907 days ago
2-25170
2 days
8658 eric-wieser
author:eric-wieser
 feat: support right actions for `Con` This adds a new `Con.CompatibleSMul` typeclass that captures exactly the condition when `smul` descends to the quotient. I was not quite able to merge this with `MulAction.QuotientAction`: * The imports are such that the congruence relation `QuotientGroup.con` is not yet available in that file * `QuotientGroup.con` requires the subgroup to be normal, while `MulAction.QuotientAction` does not --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict awaiting-author t-algebra
label:t-algebra$
 80/18 Mathlib/GroupTheory/Congruence.lean,Mathlib/RingTheory/Congruence.lean 2 6 ['YaelDillies', 'eric-wieser'] nobody
660-49751
1 year ago
877-15398
877 days ago
29-65537
29 days
8788 FMLJohn
author:FMLJohn
 feat(Algebra/Module/GradeZeroModule): if `A` is a graded semiring and `M` is a graded `A`-module, then each grade of `M` is a module over the 0-th grade of `A`. --- - [ ] depends on: #8187 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-algebra
label:t-algebra$
 237/4 Mathlib.lean,Mathlib/Algebra/DirectSum/Internal.lean,Mathlib/Algebra/GradedMonoid.lean,Mathlib/Algebra/Module/GradeZeroModule.lean,Mathlib/RingTheory/GradedAlgebra/Basic.lean,Mathlib/RingTheory/GradedAlgebra/Noetherian.lean 6 4 ['FMLJohn', 'github-actions', 'leanprover-community-mathlib4-bot'] nobody
660-49751
1 year ago
900-39647
900 days ago
1-57831
1 day
8906 jjaassoonn
author:jjaassoonn
 feat: add some missing lemmas about linear algebra --- - [ ] depends on: #8905 [lifting injective modules to higher universe] [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict awaiting-author t-algebra
label:t-algebra$
 45/1 Mathlib/Algebra/Category/ModuleCat/Basic.lean,Mathlib/Algebra/Module/Injective.lean,Mathlib/LinearAlgebra/Basic.lean,Mathlib/LinearAlgebra/BilinearMap.lean 4 21 ['AntoineChambert-Loir', 'alreadydone', 'jjaassoonn', 'leanprover-community-mathlib4-bot'] nobody
660-49751
1 year ago
896-22845
896 days ago
0-343
5 minutes
8961 eric-wieser
author:eric-wieser
 refactor: use the coinduced topology on ULift --- - [x] depends on: #8958 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) please-adopt merge-conflict awaiting-author awaiting-CI 46/14 Mathlib/Analysis/Normed/Group/Basic.lean,Mathlib/Topology/Bornology/Constructions.lean,Mathlib/Topology/Constructions.lean 3 6 ['eric-wieser', 'github-actions', 'leanprover-community-mathlib4-bot', 'urkud'] nobody
660-49751
1 year ago
893-81581
893 days ago
0-1
1 second
9146 laughinggas
author:laughinggas
 feat(Data/ZMod/Defs): Topological structure on `ZMod` Added a discrete topology structure to `ZMod n` for all `n` --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-algebra awaiting-author t-topology
label:t-algebra$
 55/3 Mathlib.lean,Mathlib/Topology/Algebra/Constructions.lean,Mathlib/Topology/Algebra/Group/Basic.lean,Mathlib/Topology/Instances/ZMod.lean,Mathlib/Topology/Maps.lean 5 61 ['YaelDillies', 'eric-wieser', 'github-actions', 'jcommelin', 'laughinggas', 'mo271', 'urkud'] nobody
660-49751
1 year ago
867-7842
867 days ago
7-11053
7 days
9229 eric-wieser
author:eric-wieser
 refactor(Algebra/GradedMonoid): Use `HMul` to define `GMul` This make the notation much nicer, but I'm pretty sure this is a bad idea for performance / ambiguity reasons. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict WIP t-algebra
label:t-algebra$
 114/125 Mathlib/Algebra/DirectSum/Algebra.lean,Mathlib/Algebra/DirectSum/Internal.lean,Mathlib/Algebra/DirectSum/Ring.lean,Mathlib/Algebra/GradedMonoid.lean,Mathlib/Algebra/GradedMulAction.lean,Mathlib/Algebra/Module/GradedModule.lean,Mathlib/Algebra/MonoidAlgebra/ToDirectSum.lean,Mathlib/LinearAlgebra/TensorAlgebra/ToTensorPower.lean,Mathlib/LinearAlgebra/TensorPower.lean,Mathlib/LinearAlgebra/TensorProduct/Graded/Internal.lean,Mathlib/RingTheory/GradedAlgebra/Basic.lean 11 6 ['eric-wieser', 'leanprover-bot'] nobody
660-49751
1 year ago
unknown
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0 seconds
9354 chenyili0818
author:chenyili0818
 feat: monotonicity of gradient on convex real-valued functions This file is based on Mathlib.Analysis.Calculus.Gradient.Basic, and describes the calculation properties co-authored-by: Ziyu Wang [tropicalfish910@gmail.com](mailto:tropicalfish910@gmail.com) --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict awaiting-author t-analysis 540/0 Mathlib.lean,Mathlib/Analysis/Convex/ConvexFunction.lean 2 15 ['github-actions', 'winstonyin'] nobody
660-49751
1 year ago
850-80377
850 days ago
23-36394
23 days
9356 alexjbest
author:alexjbest
 feat: assumption? A little helper for replacing `assumption`s with `exact` statements quickly --- If this is approved I will add tests This begs the question of whether it might simply be better to add some sort of code action for "replace with trythis output" [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict awaiting-author t-meta 24/0 Mathlib.lean,Mathlib/Tactic.lean,Mathlib/Tactic/Common.lean,Mathlib/Tactic/TryAssumption.lean 4 5 ['alexjbest', 'j-loreaux', 'jcommelin'] nobody
660-49751
1 year ago
854-85749
854 days ago
19-26336
19 days
9469 dupuisf
author:dupuisf
 feat: maximum modulus principle for functions vanishing at infinity This PR adds versions of the maximum modulus principle for functions vanishing at infinity that parallel those we already had for functions over a bounded set. These will have applications in e.g. norm interpolation. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) awaiting-author t-analysis 71/0 Mathlib/Analysis/Complex/AbsMax.lean 1 8 ['dupuisf', 'j-loreaux'] nobody
660-49751
1 year ago
855-4597
855 days ago
12-86009
12 days
9487 eric-wieser
author:eric-wieser
 feat: the exponential of dual numbers over non-commutative rings This is a work in progress, as I don't know my way around the measure theory library. --- - [x] depends on: #9489 - [x] depends on: #9486 - [x] depends on: #10427 - [ ] depends on: #10452 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) WIP t-algebra t-measure-probability merge-conflict t-analysis
label:t-algebra$
 97/0 Mathlib/Analysis/NormedSpace/TrivSqZeroExt.lean 1 7 ['github-actions', 'leanprover-community-mathlib4-bot'] nobody
660-49751
1 year ago
unknown
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9510 eric-wieser
author:eric-wieser
 feat(Analysis/Calculus/DualNumber): Extending differentiable functions to dual numbers This shows that this operation preserves multiplication and composition --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) WIP t-algebra t-analysis awaiting-CI
label:t-algebra$
 119/0 Mathlib/Analysis/Calculus/DualNumber.lean 1 4 ['github-actions'] nobody
660-49751
1 year ago
unknown
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9570 eric-wieser
author:eric-wieser
 feat(Algebra/Star): Non-commutative generalization of `StarModule` [Zulip thread](https://leanprover.zulipchat.com/#narrow/stream/116395-maths/topic/Star.20modules.20over.20non-commutative.20scalars/near/383664005). Until we address #7152, we have to have both `StarModule` and `StarModule'`. To prove this generalization is useful, this shows that with it as an assumption, `TrivSqZeroExt` is a `StarRing`. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict WIP t-algebra awaiting-CI
label:t-algebra$
 66/6 Mathlib/Algebra/Star/Basic.lean,Mathlib/Algebra/Star/Pi.lean,Mathlib/Algebra/Star/Prod.lean,Mathlib/Algebra/TrivSqZeroExt.lean 4 0 [] nobody
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1 year ago
unknown
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9642 eric-wieser
author:eric-wieser
 refactor(Analysis/Normed/{Group/Field}/Basic): Let `extends` generate the repeated fields New-style structure shenanigans mean that instance constructors randomly complain about a missing field that can be found with `__ : MetricSpace _ := infer_instance`. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) I will write a longer PR description for this once CI is happy WIP merge-conflict awaiting-author help-wanted t-analysis 122/202 Mathlib/Analysis/Calculus/ContDiff/Basic.lean,Mathlib/Analysis/Complex/Basic.lean,Mathlib/Analysis/Matrix.lean,Mathlib/Analysis/Normed/Field/Basic.lean,Mathlib/Analysis/Normed/Group/Basic.lean,Mathlib/Analysis/Normed/Group/Completion.lean,Mathlib/Analysis/Normed/Order/Basic.lean,Mathlib/Analysis/NormedSpace/ProdLp.lean,Mathlib/Analysis/NormedSpace/Star/Matrix.lean,Mathlib/Analysis/NormedSpace/Unitization.lean,Mathlib/Analysis/Quaternion.lean,Mathlib/Geometry/Manifold/Instances/Sphere.lean,Mathlib/InformationTheory/Hamming.lean,Mathlib/MeasureTheory/Measure/Lebesgue/VolumeOfBalls.lean,Mathlib/NumberTheory/NumberField/CanonicalEmbedding.lean,Mathlib/NumberTheory/Padics/PadicIntegers.lean,Mathlib/Topology/ContinuousFunction/Bounded.lean 17 11 ['eric-wieser', 'leanprover-bot', 'urkud'] nobody
660-49751
1 year ago
unknown
0-0
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6580 adomani
author:adomani
 chore: `move_add`-driven replacements This PR accompanies #6576 and uses `move_add/mul` to simplify/streamline a selection of proofs. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict awaiting-author 12/13 Counterexamples/Monic_nonRegular.lean,Mathlib/Algebra/Associated.lean,Mathlib/Data/Polynomial/RingDivision.lean,Mathlib/LinearAlgebra/QuadraticForm/Basic.lean 4 0 [] nobody
660-49750
1 year ago
946-12514
946 days ago
62-34247
62 days
6630 MohanadAhmed
author:MohanadAhmed
 feat: Reduced Spectral Theorem For A hermitian matrix $A : n \times n$ with rank $A.rank \leq n$, we can eliminate the zero eigenvalues and their corresponding eigenvectors from the (alternate) spectral theorem. As such the matrix $A$ can be written as: $$A = V₁ D V₁ᴴ$$ where - $V₁$ : $n \times r$ is the matrix of eigenvector with non-zero associated eigenvalues. - $D$ is $r \times r$ is the diagonal matrix containing only non-zero eigenvalues on its main diagonal. with $r = A.rank$ being the rank of the matrix Towards that goal we make several equivalence definitions: - `{i // hA.eigenvalues i ≠ 0} ≃ Fin (A.rank)` the set of non-zero eigenvalues can be indexed by the numbers from 0 to (r - 1). - `{i // ¬ hA.eigenvalues i ≠ 0} ≃ Fin (n - A.rank)` the set of non-zero eigenvalues can be indexed by the numbers from 0 to (n - r - 1). - `{i // hA.eigenvalues i ≠ 0} ⊕ {i // ¬hA.eigenvalues i ≠ 0} ≃ n`: the index set of the matrix (together with the associated eigenvector matrix and eigenvalues matrix ) can be partitioned into two complement groups the ones corresponding to non-zero eigenvalues and the ones corresponding to zero eigenvalues. - We can then put the previous definitions together to obtain a: `Fin (A.rank) ⊕ Fin (Fintype.card n - A.rank) ≃ n` --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict WIP t-algebra
label:t-algebra$
 31/0 Mathlib/LinearAlgebra/Matrix/Spectrum.lean 1 0 [] nobody
660-49750
1 year ago
unknown
0-0
0 seconds
6777 adomani
author:adomani
 chore(Co*variantClass): replace eta-expanded (· * ·), (· + ·), (· ≤ ·), (· < ·) Replace `CovariantClass X X (· * ·) (· ≤ ·)` with -> `CovariantClass X X HMul.hMul LE.le` and similarly for `HAdd`, `LT`, `Contravariant`. This PR is inspired by [Issue #6646](https://github.com/leanprover-community/mathlib4/issues/6646) and, more specifically, [this comment](https://github.com/leanprover-community/mathlib4/issues/6646#issuecomment-1692792066). Note that https://github.com/leanprover/lean4/pull/2267 would make this unnecessary --- ```bash # First sed command: # the first captured pattern is `Co*variantClass ` # the second captured pattern is `` # the third captured pattern is `+` or `*` # the fourth captured pattern is `<` or `≤` # a match for `Co*variantClass (· ·) (· ·)` becomes # `Co*variantClass replaceop replaceop` # Second sed command: similar to the first, but looks for `(Function.swap (· ·))` sed -i ' s=\(Co[ntra]*variantClass \(..*\) \2 \)(· *\([+*]\) *·) (· *\([<≤]\) *·)=\1replaceop\3 replaceop\4=g s=\(Co[ntra]*variantClass \(..*\) \2 \)(\([Functio\.swap ]*\)(· *\([+*]\) *·)) (· *\([<≤]\) *·)=\1(\3replaceop\4) replaceop\5=g s=replaceop+=HAdd.hAdd=g s=replaceop\*=HMul.hMul=g s=replaceop<=LT.lt=g s=replaceop≤=LE.le=g s=\(Co[ntra]*variantClass N N\) (· \* ·) r=\1 HMul.hMul r=g s=\(Co[ntra]*variantClass N N (swap μ)\) (· ≤ ·)=\1 LE.le=g s=\(Co[ntra]*variantClass N N\) (swap (· \* ·)) r=\1 (swap HMul.hMul) r=g s=\(CovariantClass (Filter α) (Filter α)\) (· / ·) (· ≤ ·)=\1 HDiv.hDiv LE.le=g s=\(CovariantClass (Filter α) (Filter α)\) (swap (· / ·)) (· ≤ ·)=\1 (swap HDiv.hDiv) LE.le=g s=\(Co[ntra]*variantClass .* (fun x y .> . \* .)\) (· ≤ ·)=\1 LE.le=g s=\(Co[ntra]*variantClass .* (fun x y .> . \* .)\) (· < ·)=\1 LT.lt=g s=\(Co[ntra]*variantClass [^}]*\) (· ≤ ·)=\1 LE.le=g s=\(CovariantClass .* (Filter β)\) (· • ·) LE.le=\1 HSMul.hSMul LE.le=g ' $(git ls-files '*.lean') ``` [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict 703/678 Counterexamples/ZeroDivisorsInAddMonoidAlgebras.lean,Mathlib/Algebra/BigOperators/Basic.lean,Mathlib/Algebra/Bounds.lean,Mathlib/Algebra/CovariantAndContravariant.lean,Mathlib/Algebra/DirectSum/Internal.lean,Mathlib/Algebra/Group/UniqueProds.lean,Mathlib/Algebra/GroupPower/Order.lean,Mathlib/Algebra/MonoidAlgebra/Degree.lean,Mathlib/Algebra/Order/Archimedean.lean,Mathlib/Algebra/Order/Group/Abs.lean,Mathlib/Algebra/Order/Group/Defs.lean,Mathlib/Algebra/Order/Group/DenselyOrdered.lean,Mathlib/Algebra/Order/Group/MinMax.lean,Mathlib/Algebra/Order/Group/OrderIso.lean,Mathlib/Algebra/Order/Hom/Monoid.lean,Mathlib/Algebra/Order/Interval.lean,Mathlib/Algebra/Order/Kleene.lean,Mathlib/Algebra/Order/LatticeGroup.lean,Mathlib/Algebra/Order/Module.lean,Mathlib/Algebra/Order/Monoid/Basic.lean,Mathlib/Algebra/Order/Monoid/Cancel/Defs.lean,Mathlib/Algebra/Order/Monoid/Canonical/Defs.lean,Mathlib/Algebra/Order/Monoid/Defs.lean,Mathlib/Algebra/Order/Monoid/Lemmas.lean,Mathlib/Algebra/Order/Monoid/MinMax.lean,Mathlib/Algebra/Order/Monoid/NatCast.lean,Mathlib/Algebra/Order/Monoid/OrderDual.lean,Mathlib/Algebra/Order/Monoid/Prod.lean,Mathlib/Algebra/Order/Monoid/WithTop.lean,Mathlib/Algebra/Order/Monoid/WithZero/Basic.lean,Mathlib/Algebra/Order/Monoid/WithZero/Defs.lean,Mathlib/Algebra/Order/Nonneg/Ring.lean,Mathlib/Algebra/Order/Pointwise.lean,Mathlib/Algebra/Order/Positive/Ring.lean,Mathlib/Algebra/Order/Ring/Canonical.lean,Mathlib/Algebra/Order/Ring/Defs.lean,Mathlib/Algebra/Order/Ring/Lemmas.lean,Mathlib/Algebra/Order/Sub/Basic.lean,Mathlib/Algebra/Order/Sub/Canonical.lean,Mathlib/Algebra/Order/Sub/Defs.lean,Mathlib/Algebra/Order/WithZero.lean,Mathlib/Algebra/Parity.lean,Mathlib/Algebra/Star/Order.lean,Mathlib/Algebra/Tropical/Basic.lean,Mathlib/Analysis/Normed/Order/Lattice.lean,Mathlib/Data/DFinsupp/Lex.lean,Mathlib/Data/DFinsupp/Order.lean,Mathlib/Data/Finset/Fold.lean,Mathlib/Data/Finsupp/Lex.lean,Mathlib/Data/Finsupp/Order.lean,Mathlib/Data/List/BigOperators/Basic.lean,Mathlib/Data/List/BigOperators/Lemmas.lean,Mathlib/Data/Multiset/Basic.lean,Mathlib/Data/Nat/Cast/Order.lean,Mathlib/Data/PNat/Basic.lean,Mathlib/Data/Real/ENNReal.lean,Mathlib/Data/Real/NNReal.lean,Mathlib/Data/Set/Semiring.lean,Mathlib/Data/Sign.lean,Mathlib/MeasureTheory/Function/LpOrder.lean,Mathlib/MeasureTheory/Function/SimpleFuncDenseLp.lean,Mathlib/MeasureTheory/Measure/MeasureSpace.lean,Mathlib/MeasureTheory/Measure/VectorMeasure.lean,Mathlib/Order/ConditionallyCompleteLattice/Group.lean,Mathlib/Order/Filter/Basic.lean,Mathlib/Order/Filter/Pointwise.lean,Mathlib/Probability/Martingale/Basic.lean,Mathlib/Probability/Process/Stopping.lean,Mathlib/RingTheory/GradedAlgebra/Basic.lean,Mathlib/SetTheory/Cardinal/Basic.lean,Mathlib/SetTheory/Game/Basic.lean,Mathlib/SetTheory/Game/PGame.lean,Mathlib/SetTheory/Ordinal/Arithmetic.lean,Mathlib/SetTheory/Ordinal/Basic.lean,Mathlib/SetTheory/Ordinal/NaturalOps.lean,Mathlib/Tactic/GCongr/Core.lean,Mathlib/Tactic/Positivity/Basic.lean,Mathlib/Topology/ContinuousFunction/Algebra.lean,lean-toolchain,test/Recall.lean,test/propose.lean 81 37 ['adomani', 'alreadydone', 'digama0', 'eric-wieser', 'ericrbg', 'jcommelin', 'leanprover-bot', 'sgouezel', 'vihdzp'] nobody
660-49750
1 year ago
935-15247
935 days ago
35-63136
35 days
6791 eric-wieser
author:eric-wieser
 refactor: Use flat structures for morphisms This restores the symmetry we had in Lean3, where we had `MonoidHom.mk f one mul` not `MonoidHom.mk (OneHom.mk f one) mul`, and `f.toFun` wasn't notation for `f.toMulHom.toFun`. The nesting provided by the previous inheritance is useless to us in the face of `MonoidHomClass.toMonoidHom`, which completely eta-expands the structure anyway. We call the class `FunLikeFlatHack._` because this means the field is called `to_` which uses up less space in the goal view than any alternative. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict awaiting-author help-wanted awaiting-CI 174/201 Mathlib/Algebra/Algebra/Equiv.lean,Mathlib/Algebra/Algebra/Hom.lean,Mathlib/Algebra/Category/GroupCat/ZModuleEquivalence.lean,Mathlib/Algebra/Category/GroupWithZeroCat.lean,Mathlib/Algebra/Category/ModuleCat/Presheaf.lean,Mathlib/Algebra/Category/MonCat/Basic.lean,Mathlib/Algebra/Group/Ext.lean,Mathlib/Algebra/Group/Prod.lean,Mathlib/Algebra/Group/UniqueProds.lean,Mathlib/Algebra/Hom/Equiv/Basic.lean,Mathlib/Algebra/Hom/Group/Defs.lean,Mathlib/Algebra/Hom/GroupAction.lean,Mathlib/Algebra/Hom/NonUnitalAlg.lean,Mathlib/Algebra/Hom/Ring/Defs.lean,Mathlib/Algebra/Lie/Basic.lean,Mathlib/Algebra/Module/Equiv.lean,Mathlib/Algebra/Module/LinearMap.lean,Mathlib/Algebra/Order/Hom/Ring.lean,Mathlib/Algebra/Order/Interval.lean,Mathlib/Algebra/Ring/Equiv.lean,Mathlib/Analysis/Normed/Group/SemiNormedGroupCat.lean,Mathlib/Data/FunLike/Basic.lean,Mathlib/Data/Rat/Cast/CharZero.lean,Mathlib/Data/Real/EReal.lean,Mathlib/Data/Real/Sqrt.lean,Mathlib/GroupTheory/FreeAbelianGroup.lean,Mathlib/GroupTheory/MonoidLocalization.lean,Mathlib/LinearAlgebra/Quotient.lean,Mathlib/LinearAlgebra/TensorProduct.lean,Mathlib/RingTheory/RingInvo.lean,Mathlib/Topology/Algebra/Module/Basic.lean,Mathlib/Topology/MetricSpace/Dilation.lean 32 0 [] nobody
660-49750
1 year ago
unknown
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6930 kmill
author:kmill
 feat: `resynth_instances` tactic for resynthesizing instances in the goal or local context This tactic can be useful for debugging non-canonical instances or for fixing up goals and hypotheses after using the `classical` tactic. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict WIP t-meta 327/0 Mathlib.lean,Mathlib/Tactic.lean,Mathlib/Tactic/ResynthInstances.lean,test/ResynthInstances.lean 4 0 [] nobody
660-49750
1 year ago
unknown
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6931 urkud
author:urkud
 refactor(Analysis/Normed*): use `RingHomIsometric` for `*.norm_cast` --- I don't understand why linter fails. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict help-wanted t-analysis 78/68 Mathlib/Analysis/LocallyConvex/ContinuousOfBounded.lean,Mathlib/Analysis/Normed/Field/Basic.lean,Mathlib/Analysis/Normed/Group/Basic.lean,Mathlib/Analysis/NormedSpace/Basic.lean,Mathlib/Analysis/NormedSpace/Exponential.lean,Mathlib/Analysis/NormedSpace/Spectrum.lean,Mathlib/Analysis/RCLike/Basic.lean,Mathlib/NumberTheory/NumberField/Embeddings.lean 8 0 [] nobody
660-49750
1 year ago
unknown
0-0
0 seconds
7227 kmill
author:kmill
 feat: flexible binders and integration into notation3 Introduces `flexibleBinders`, which is an extensible system for binder notations that allow destructuring, bounded domains, and other niceties. Integrates this into `notation3`, and makes `Finset.sum`/`Finset.prod` use it. --- - [ ] depends on: #6833 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict WIP t-meta 1215/131 Mathlib.lean,Mathlib/Algebra/BigOperators/Basic.lean,Mathlib/Algebra/BigOperators/Intervals.lean,Mathlib/Algebra/BigOperators/NatAntidiagonal.lean,Mathlib/Mathport/Notation.lean,Mathlib/Util/FlexibleBinders.lean,Mathlib/Util/FlexibleBindersFinset.lean,Mathlib/Util/SyntaxFun.lean,test/FlexibleBinders.lean,test/notation3.lean 10 3 ['eric-wieser', 'kmill', 'leanprover-community-mathlib4-bot'] nobody
660-49750
1 year ago
unknown
0-0
0 seconds
7351 shuxuezhuyi
author:shuxuezhuyi
 feat(Topology/Algebra/Order): extend function on `Ioo` to `Icc` Extend a strictly monotone function defined on an open interval. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict awaiting-author t-order 59/0 Mathlib.lean,Mathlib/Data/Set/Function.lean,Mathlib/Topology/Algebra/Order/IccExtendFromIoo.lean 3 7 ['j-loreaux', 'shuxuezhuyi'] nobody
660-49750
1 year ago
939-18578
939 days ago
30-32706
30 days
7467 ADedecker
author:ADedecker
 feat: spectrum of X →ᵇ ℂ is StoneCech X --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict WIP t-analysis 121/23 Mathlib/Analysis/NormedSpace/Star/BoundedContinuousFunction.lean,Mathlib/Analysis/NormedSpace/Star/GelfandDuality.lean,Mathlib/Topology/ContinuousFunction/Bounded.lean,Mathlib/Topology/ContinuousFunction/Compact.lean 4 1 ['github-actions'] nobody
660-49750
1 year ago
unknown
0-0
0 seconds
7564 shuxuezhuyi
author:shuxuezhuyi
 feat(Topology/Algebra/Order): extend strictly monotone function on `Ioo` to homeomorphism on `Icc` A strictly monotone function between open intervals can be extended to a homeomorphism between the closed intervals. --- - [ ] depends on: #7351 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-topology blocked-by-other-PR 162/0 Mathlib.lean,Mathlib/Topology/Algebra/Order/IccExtendFromIoo.lean 2 1 ['leanprover-community-mathlib4-bot'] nobody
660-49750
1 year ago
958-36982
958 days ago
0-537
8 minutes
7601 digama0
author:digama0
 feat: ring hom support in `ring` As [requested on Zulip](https://leanprover.zulipchat.com/#narrow/stream/287929-mathlib4/topic/aroots/near/395750055). Adds support for distributing ring morphisms in `ring`: ```lean example (p : ℤ[X]) (r : ℤ) : C (2 * r) * p = C r * p + C r * p := by ring ``` --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict awaiting-author t-algebra t-meta
label:t-algebra$
 257/48 Mathlib/Tactic/Ring/Basic.lean,test/linear_combination.lean,test/ring.lean 3 1 ['eric-wieser'] nobody
660-49750
1 year ago
893-33353
893 days ago
62-28836
62 days
7615 eric-wieser
author:eric-wieser
 chore(LinearAlgebra/Basic): generalize compatibleMaps to semilinear maps Spotted while reviewing #7611 --- - [x] depends on: #7611 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-algebra easy awaiting-CI
label:t-algebra$
 9/33 Mathlib/LinearAlgebra/Basic.lean 1 1 ['leanprover-community-mathlib4-bot'] nobody
660-49750
1 year ago
954-84458
954 days ago
0-1
1 second
7713 RemyDegenne
author:RemyDegenne
 feat: add_left/right_inj for measures `μ + ν₁ = μ + ν₂ ↔ ν₁ = ν₂`, and similarly on the right. This is not true in general for measures, but is true when `μ` is mutually singular with the two other measures or when `μ` is finite. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict awaiting-author t-measure-probability 53/1 Mathlib/MeasureTheory/Measure/MutuallySingular.lean,lean-toolchain 2 6 ['RemyDegenne', 'digama0', 'eric-wieser', 'fpvandoorn'] nobody
660-49750
1 year ago
948-43888
948 days ago
0-62955
17 hours
7835 shuxuezhuyi
author:shuxuezhuyi
 feat(LinearAlgebra/Matrix): `lift` for projective special linear group We provide converters to help with the use of "quotient.liftOn" on projective special linear groups. --- - [x] depends on: #7826 - [x] depends on: #7791 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict awaiting-author t-algebra
label:t-algebra$
 52/0 Mathlib/LinearAlgebra/Matrix/ProjectiveSpecialLinearGroup.lean 1 3 ['jcommelin', 'leanprover-community-mathlib4-bot', 'shuxuezhuyi'] jcommelin
assignee:jcommelin
660-49750
1 year ago
806-59581
806 days ago
1-85797
1 day
7875 astrainfinita
author:astrainfinita
 chore: make `SMulCommClass A A B` and `SMulCommClass A B B` higher priority --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict slow-typeclass-synthesis t-algebra
label:t-algebra$
 54/48 Mathlib/Algebra/Algebra/Basic.lean,Mathlib/Algebra/Algebra/NonUnitalSubalgebra.lean,Mathlib/Algebra/DirectSum/Algebra.lean,Mathlib/Algebra/Group/Action/Defs.lean,Mathlib/Algebra/Group/Subgroup/Actions.lean,Mathlib/Algebra/Lie/NonUnitalNonAssocAlgebra.lean,Mathlib/Algebra/Module/LinearMap/End.lean,Mathlib/Algebra/MonoidAlgebra/Basic.lean,Mathlib/Algebra/MvPolynomial/Basic.lean,Mathlib/Algebra/Ring/CentroidHom.lean,Mathlib/Algebra/Ring/Subring/Basic.lean,Mathlib/Algebra/Ring/Subsemiring/Basic.lean,Mathlib/Algebra/Star/NonUnitalSubalgebra.lean,Mathlib/Analysis/Complex/UnitDisc/Basic.lean,Mathlib/Analysis/NormedSpace/lpSpace.lean,Mathlib/Data/Matrix/Basic.lean,Mathlib/GroupTheory/GroupAction/Prod.lean,Mathlib/GroupTheory/GroupAction/Ring.lean,Mathlib/GroupTheory/GroupAction/SubMulAction.lean,Mathlib/GroupTheory/MonoidLocalization.lean,Mathlib/GroupTheory/Submonoid/Center.lean,Mathlib/LinearAlgebra/PiTensorProduct.lean,Mathlib/RingTheory/Ideal/Quotient.lean,Mathlib/RingTheory/TensorProduct/Basic.lean,Mathlib/Topology/ContinuousFunction/ContinuousMapZero.lean,Mathlib/Topology/ContinuousFunction/StoneWeierstrass.lean,Mathlib/Topology/ContinuousFunction/ZeroAtInfty.lean 27 15 ['Parcly-Taxel', 'astrainfinita', 'jcommelin', 'leanprover-bot'] nobody
660-49750
1 year ago
714-66258
714 days ago
1-47913
1 day
7932 eric-wieser
author:eric-wieser
 refactor(Algebra/TrivSqZeroExt): replace with a structure This is dogfooding my claim that "one-field structures are the lesser evil in Lean 4". This runs into the `simp [(stupid_parens)]` bug; or rather, a particular nasty instance of it where the offending simp call is inside `@[simps]`. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-algebra awaiting-CI
label:t-algebra$
 155/73 Mathlib/Algebra/DualNumber.lean,Mathlib/Algebra/TrivSqZeroExt.lean,Mathlib/Logic/Equiv/TransferInstance.lean,Mathlib/Topology/Instances/TrivSqZeroExt.lean 4 1 ['github-actions'] nobody
660-49750
1 year ago
unknown
0-0
0 seconds
7962 eric-wieser
author:eric-wieser
 feat: `DualNumber (Quaternion R)` as a `CliffordAlgebra` This provides a clifford algebra isomorphic to the dual quaternions --- - [x] depends on: #7934 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict WIP t-algebra
label:t-algebra$
 307/7 Mathlib/Algebra/DualNumber.lean,Mathlib/Algebra/QuaternionBasis.lean,Mathlib/LinearAlgebra/CliffordAlgebra/Equivs.lean 3 16 ['github-actions', 'leanprover-community-mathlib4-bot'] nobody
660-49750
1 year ago
unknown
0-0
0 seconds
8364 thorimur
author:thorimur
 feat: `refine?` This PR adds `refine? e`, which suggests replacing unsynthesized `_`'s in `e` with `?_` in order to make `refine e'` work: ```lean example : Nat → Nat := by refine? fun (_ : _) => _ -- Try this: refine fun (_ : _) => ?_ ``` Note that this only suggests replacements for `_`'s present in the syntax; to create goals for implicit or instance arguments, the user is expected to use `refine'`. --- I'm especially open to suggestions on the filename (currently `RefineFix`). I'm also curious if this behaves as expected! Feel free to try it out "in real life" and comment here on edge cases. - [ ] depends on: #8503 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict blocked-by-other-PR t-meta 684/5 Mathlib.lean,Mathlib/Lean/CoreM.lean,Mathlib/Lean/Elab/Tactic/ElabTerm.lean,Mathlib/Lean/Elab/Term.lean,Mathlib/Tactic.lean,Mathlib/Tactic/RefineFix.lean,Mathlib/Util/Delaborators.lean,Mathlib/Util/Syntax.lean,test/RefineFix.lean 9 5 ['j-loreaux', 'leanprover-community-mathlib4-bot', 'thorimur'] nobody
660-49750
1 year ago
915-69884
915 days ago
6-59892
6 days
4871 j-loreaux
author:j-loreaux
 feat: define the additive submonoid of positive elements in a star ordered ring This file defines the `AddSubmonoid` of nonegative elements `StarOrderedRing.positive R` in a star ordered ring `R` with carrier `{ x : R | 0 ≤ x }` (in fact, the definition only requires `OrderedAddCommMonoid R` to allow for other use cases, but it is primarily intended for `StarOrderedRing R`). Equivalently, this is the `AddSubmonoid` generated by the elements of the form `star s * s`. Even though this technically corresponds to the nonnegative elements, the "positive" terminology is standard throughout the literature (at least in C⋆-algebra theory and operator theory), so we choose to prefer that. The advantage of using this over other definitions of positivity is that it allows us to unify several different concepts under a single umbrella. For example, one might be tempted to consider the collection of bounded linear operators on an Hilbert space and define positivity as `∀ x, 0 ≤ ⟪T x, x⟫`, but this doesn't generalize nicely to C⋆-algebras. Alternatively, one could define positivity as those self-adjoint elements with nonnegative spectrum, but this requires the algebra to be unital. Our definition herein conveniently sidesteps these issues. --- Note: I declared the `AddMonoidWithOne` and `AddGroupWithOne` instances for `selfAdjoint R` separately because it made the proof of the latter easier. - [x] depends on: #6229 - [x] depends on: #10209 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-algebra awaiting-CI
label:t-algebra$
 216/12 Mathlib.lean,Mathlib/Algebra/Order/Ring/CharZero.lean,Mathlib/Algebra/Star/Order.lean,Mathlib/Algebra/Star/Positive.lean,Mathlib/Algebra/Star/SelfAdjoint.lean,Mathlib/GroupTheory/Submonoid/Operations.lean 6 28 ['eric-wieser', 'j-loreaux', 'leanprover-community-mathlib4-bot'] nobody
660-49749
1 year ago
1073-35801
1073 days ago
5-55287
5 days
5133 kmill
author:kmill
 feat: IntermediateField adjoin syntax for sets of elements Adds support for both `F⟮S⟯` and `F⟮α⟯`. The term `x` in `F⟮x⟯` is elaborated, and if it has type `Set _` the first interpretation is used, and otherwise the second is. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict WIP t-algebra
label:t-algebra$
 110/55 Mathlib/FieldTheory/Adjoin.lean 1 0 [] nobody
660-49749
1 year ago
1071-50875
1071 days ago
0-20
20 seconds
5912 ADedecker
author:ADedecker
 feat(Analysis.Distribution.ContDiffMapSupportedIn): space of smooth maps with support in a fixed compact --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict WIP t-analysis 513/13 Mathlib.lean,Mathlib/Analysis/Distribution/ContDiffMapSupportedIn.lean,Mathlib/Analysis/LocallyConvex/WithSeminorms.lean,Mathlib/Analysis/Seminorm.lean,Mathlib/Data/FunLike/Basic.lean,Mathlib/Data/Set/Function.lean,Mathlib/Topology/Algebra/Module/StrongTopology.lean,Mathlib/Topology/ContinuousFunction/Bounded.lean 8 0 [] nobody
660-49749
1 year ago
unknown
0-0
0 seconds
6002 slerpyyy
author:slerpyyy
 feat(Analysis.SpecialFunctions.Gaussian): add `integrable_fun_mul_exp_neg_mul_sq` If `f : ℝ → ℝ` is bounded by a polynomial, `fun x : ℝ => f x * exp (-b * x ^ 2)` is integrable. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict awaiting-author t-analysis 26/0 Mathlib/Analysis/SpecialFunctions/Gaussian.lean 1 3 ['ocfnash', 'slerpyyy', 'urkud'] nobody
660-49749
1 year ago
1028-50111
1028 days ago
9-71263
9 days
6195 eric-wieser
author:eric-wieser
 chore(RingTheory/TensorProduct): golf the `mul` definition --- - [x] depends on: #6211 - [x] depends on: #6187 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) Strangely this causes a timeout downstream merge-conflict t-algebra awaiting-CI
label:t-algebra$
 4/29 Mathlib/RingTheory/TensorProduct.lean 1 1 ['leanprover-community-mathlib4-bot'] nobody
660-49749
1 year ago
unknown
0-0
0 seconds
6328 FR-vdash-bot
author:FR-vdash-bot
 chore: make some instance about `Sub...Class` lower priority Many similar instances have been marked as lower priority. I'd like to see if this would make things faster. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict WIP t-algebra awaiting-CI
label:t-algebra$
 14/14 Mathlib/RingTheory/NonUnitalSubsemiring/Basic.lean,Mathlib/RingTheory/Subsemiring/Basic.lean,lean-toolchain 3 1 ['digama0'] nobody
660-49749
1 year ago
unknown
0-0
0 seconds
6330 astrainfinita
author:astrainfinita
 chore: make some instance about `Sub...Class` higher priority than `Sub...` The opposite direction to #6328. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict WIP t-algebra slow-typeclass-synthesis
label:t-algebra$
 123/128 Mathlib/Algebra/Algebra/NonUnitalSubalgebra.lean,Mathlib/Algebra/Algebra/Subalgebra/Basic.lean,Mathlib/Algebra/Star/NonUnitalSubalgebra.lean,Mathlib/FieldTheory/IsAlgClosed/Basic.lean,Mathlib/FieldTheory/Subfield.lean,Mathlib/RingTheory/NonUnitalSubring/Basic.lean,Mathlib/RingTheory/NonUnitalSubsemiring/Basic.lean,Mathlib/RingTheory/Polynomial/Quotient.lean,Mathlib/RingTheory/Subring/Basic.lean,Mathlib/RingTheory/Subsemiring/Basic.lean,lean-toolchain 11 13 ['astrainfinita', 'digama0', 'leanprover-bot'] nobody
660-49749
1 year ago
unknown
0-0
0 seconds
6403 astrainfinita
author:astrainfinita
 chore: change instance priorities of `Ordered*` hierarchy --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra t-order merge-conflict slow-typeclass-synthesis awaiting-author
label:t-algebra$
 253/79 Mathlib/Algebra/Order/CompleteField.lean,Mathlib/Algebra/Order/Field/Canonical/Defs.lean,Mathlib/Algebra/Order/Field/Defs.lean,Mathlib/Algebra/Order/Group/Defs.lean,Mathlib/Algebra/Order/Monoid/Basic.lean,Mathlib/Algebra/Order/Monoid/Canonical/Defs.lean,Mathlib/Algebra/Order/Monoid/Defs.lean,Mathlib/Algebra/Order/Monoid/WithZero/Defs.lean,Mathlib/Algebra/Order/Ring/Canonical.lean,Mathlib/Algebra/Order/Ring/Defs.lean,Mathlib/Algebra/Order/Ring/Star.lean,Mathlib/Algebra/Order/WithZero.lean,Mathlib/Analysis/InnerProductSpace/Orientation.lean,Mathlib/LinearAlgebra/Orientation.lean,Mathlib/RingTheory/HahnSeries.lean,Mathlib/RingTheory/LaurentSeries.lean,Mathlib/Tactic/Positivity/Core.lean,Mathlib/Topology/Algebra/WithZeroTopology.lean 18 39 ['Vierkantor', 'astrainfinita', 'digama0', 'eric-wieser', 'j-loreaux', 'leanprover-bot'] nobody
660-49749
1 year ago
905-2491
905 days ago
13-18399
13 days
6491 eric-wieser
author:eric-wieser
 chore(Mathlib/Algebra/Hom/GroupAction): add `SMulHomClass.comp_smul` --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-algebra
label:t-algebra$
 24/10 Mathlib/Algebra/Hom/GroupAction.lean 1 0 [] nobody
660-49749
1 year ago
932-35749
932 days ago
83-76369
83 days
7076 grunweg
author:grunweg
 feat: define measure zero subsets of a manifold A topological manifold has no canonical measure, but there is a canonical notion of measure zero subsets. We show that these are closed under subsets and countable unions (hence define a filter, the almost everywhere filter) and that a closed nowhere dense has empty interior. This is necessary for stating the general version of Sard's theorem (in finite dimensions), and a first step towards its proof. This code was written at LftCM 2023. Thanks for @fpvandoorn for mentoring me! :heart: --- Unresolved questions/looking for feedback - Is "measure zero" a good name or would "null set" be better? I tend towards the former, but welcome input from a measure theorist (which I'm not). - What is the correct definition? One could also define "measure zero" using any `IsOpenPosMeasure` on the charted space. I think all results in this file still hold then, but for applications (e.g., Sard's theorem), this might be too general. - define custom notation, similar to the a.e. filter on a measure space? (We could include $J$ instead of $\mu$.) - what's the right syntax for formulas in docstrings --- use LaTeX or backticks? I don't know how to preview the generated docs, the guidelines are a bit ambiguous for me. merge-conflict WIP t-differential-geometry t-measure-probability 165/0 Mathlib.lean,Mathlib/Geometry/Manifold/MeasureZero.lean,docs/references.bib 3 27 ['ADedecker', 'github-actions', 'grunweg', 'mo271', 'sgouezel'] ADedecker
assignee:ADedecker
660-49749
1 year ago
815-47058
815 days ago
43-56110
43 days
3757 thorimur
author:thorimur
 feat: config options for `fail_if_no_progress` This PR creates config options for `fail_if_no_progress` that allow the user to tweak what exactly counts as "progress". This includes whether to use defeq or `BEq`, what transparency to use, and which parts of the goal and local context to check. It also splits off the comparison functionality into `Mathlib.Lean.Meta.Compare`, which provides fully configurable comparison functions for common complex metaprogramming types not specific to `fail_if_no_progress`. These types are `Expr`, `LocalDecl`, `LocalContext`, `MetavarDecl`, `MVarId`, and `List MVarId`. --- See [zulip](https://leanprover.zulipchat.com/#narrow/stream/287929-mathlib4/topic/progress.20on.20fail_if_no_progress) for a couple review questions. Status update: this PR is now basically done, save for some extra tests which should probably be included. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict WIP t-meta 603/54 Mathlib.lean,Mathlib/Lean/Meta.lean,Mathlib/Lean/Meta/Compare.lean,Mathlib/Tactic/FailIfNoProgress.lean,test/fail_if_no_progress.lean 5 38 ['alexjbest', 'github-actions', 'joneugster', 'kim-em', 'thorimur'] nobody
660-49748
1 year ago
1117-14430
1117 days ago
0-15
15 seconds
12353 thorimur
author:thorimur
 feat: `conv%` This PR introduces `conv% e => tac`, along with `simp%`, `norm_num%`, and `push_neg%`, which are defined in terms of `conv%`. It also introduces `conv%?` (and `simp%?`, `norm_num%?`, and `push_neg%?`) as shortcuts for `show_term ...`. This is a relatively straightforward refactor of code already present in the implementation of `#conv`, and otherwise relies entirely on simple macros. This PR also introduces some modifications to existing command syntax for `#conv`, `#simp`, and `#norm_num`: * The syntax for `#conv` was `#conv tac => e`; however, this is inconsistent with the tactic syntax, and so this has been flipped to `#conv e => tac`. Likewise, `conv%` uses the same (new) syntax `conv% e => tac`. * `#simp` and `#norm_num` separated their config and `only` syntax from the expression by an optional `=>` (for `#simp`) and an optional `:` (for `#norm_num`) (e.g. `#simp only [lem] => e`). These have both been replaced with an optional`on` (e.g. `#simp only [lem] on e`) which is also used for `simp%` and `norm_num%`. Although `#whnf` is implemented in terms of `#conv`, this PR doesn't introduce `whnf%` in the same way, as that's probably better off being implemented directly instead of through `conv`. --- WIP: needs tests. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict WIP t-meta 131/32 Mathlib/Tactic/Conv.lean,Mathlib/Tactic/NormNum/Core.lean,Mathlib/Tactic/PushNeg.lean,docs/Conv/Guide.lean 4 0 [] nobody
656-26058
1 year ago
759-64100
759 days ago
0-17
17 seconds
7903 urkud
author:urkud
 feat: define `UnboundedSpace` --- The new instances generate some timeouts, and I don't understand why. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict help-wanted t-topology 111/59 Mathlib/Analysis/BoxIntegral/Basic.lean,Mathlib/Analysis/Normed/Module/Basic.lean,Mathlib/Topology/Bornology/Basic.lean,Mathlib/Topology/Bornology/Constructions.lean,Mathlib/Topology/MetricSpace/Bounded.lean,Mathlib/Topology/MetricSpace/GromovHausdorffRealized.lean 6 1 ['github-actions'] nobody
653-37727
1 year ago
unknown
0-0
0 seconds
15679 adomani
author:adomani
 test: refactor in CI --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict WIP 213/5 .github/workflows/bors.yml,.github/workflows/build.yml,.github/workflows/build.yml.in,.github/workflows/build_fork.yml,Mathlib.lean,Mathlib/Algebra/Homology/HomotopyCategory/SingleFunctors.lean,Mathlib/AlgebraicGeometry/EllipticCurve/Affine.lean,Mathlib/Analysis/CStarAlgebra/ContinuousFunctionalCalculus/Order.lean,Mathlib/Analysis/CStarAlgebra/ContinuousFunctionalCalculus/Unique.lean,Mathlib/Analysis/Convex/Combination.lean,Mathlib/Analysis/Convex/Segment.lean,Mathlib/CategoryTheory/Bicategory/Adjunction.lean,Mathlib/CategoryTheory/Monoidal/Braided/Basic.lean,Mathlib/CategoryTheory/Monoidal/Center.lean,Mathlib/GroupTheory/Coxeter/Matrix.lean,Mathlib/Order/Filter/Cocardinal.lean,Mathlib/Order/UpperLower/Basic.lean,Mathlib/TestRefactor.lean,Refactor/Main.lean,lakefile.lean,lean-toolchain 21 1 ['github-actions'] nobody
648-6903
1 year ago
650-16345
650 days ago
0-8
8 seconds
7565 shuxuezhuyi
author:shuxuezhuyi
 feat(Topology/Algebra/Order): extend homeomorphism of `Ioo` to `Icc` We extend the homeomorphisms between open intervals to homeomorphisms between the closed intervals. --- - [ ] depends on: #7018 - [ ] depends on: #7351 - [ ] depends on: #7564 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-topology blocked-by-other-PR t-order 389/5 Mathlib.lean,Mathlib/Data/Set/Intervals/Image.lean,Mathlib/Order/Directed.lean,Mathlib/Topology/Algebra/Order/IccExtendFromIoo.lean,Mathlib/Topology/Algebra/Order/IntermediateValue.lean 5 1 ['leanprover-community-mathlib4-bot'] nobody
646-43403
1 year ago
958-24282
958 days ago
0-222
3 minutes
10629 madvorak
author:madvorak
 feat: List.cons_sublist_append_iff_right --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-data 11/0 Mathlib/Data/List/Basic.lean 1 1 ['eric-wieser'] nobody
646-43294
1 year ago
772-52131
772 days ago
53-73442
53 days
9973 Ruben-VandeVelde
author:Ruben-VandeVelde
 feat: polynomials formed by lists From https://github.com/leanprover-community/mathlib/pull/15476 --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) please-adopt merge-conflict t-data 311/0 Mathlib.lean,Mathlib/Data/Polynomial/OfList.lean 2 0 [] nobody
646-42827
1 year ago
unknown
0-0
0 seconds
12926 joelriou
author:joelriou
 feat(CategoryTheory): the monoidal category structure induced by a monoidal functor In this PR, given a monoidal functor `F : MonoidalFunctor C D`, we define a monoidal category structure on the category `InducedCategory D F.obj`, which has the "same" objects as `C`, but the morphisms between `X` and `Y` identify to `F.obj X ⟶ F.obj Y`. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict WIP t-category-theory 105/0 Mathlib.lean,Mathlib/CategoryTheory/Monoidal/Induced.lean 2 3 ['eric-wieser', 'github-actions', 'joelriou'] nobody
646-41226
1 year ago
737-46431
737 days ago
0-10
10 seconds
12869 adomani
author:adomani
 feat: linter and script for `theorem` vs `lemma` This PR contains a linter for flagging doc-string-less `theorem`s, as well as a bash script that, once the linter ran on Mathlib, automatically replaces every linter-offending `theorem` by `lemma`. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-linter awaiting-author 106/0 Mathlib.lean,Mathlib/Tactic.lean,Mathlib/Tactic/Linter/ThmLemma.lean,scripts/thmLemma.sh 4 13 ['adomani', 'github-actions', 'grunweg', 'joneugster'] nobody
646-27990
1 year ago
700-48485
700 days ago
38-16364
38 days
14563 awueth
author:awueth
 feat: if-then-else of exclusive or statement --- If `¬(P ∧ Q)` then `ite (P ∨ Q) a 1 = (ite P a 1) * (ite Q a 1)` [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) awaiting-author t-algebra new-contributor
label:t-algebra$
 5/0 Mathlib/Algebra/Group/Basic.lean 1 3 ['eric-wieser', 'github-actions', 'kim-em'] nobody
645-42142
1 year ago
676-2724
676 days ago
6-38745
6 days
12093 ADedecker
author:ADedecker
 feat: tweak the definition of semicontinuity to behave better in nonlinear orders Summary of the changes: - change definitions to make [lowerSemicontinuous_iff_isClosed_preimage](https://leanprover-community.github.io/mathlib4_docs/Mathlib/Topology/Semicontinuous.html#lowerSemicontinuous_iff_isClosed_preimage) true without assuming `LinearOrder`, so that semicontinuity corresponds to continuity for lower/upper order topology on the codomain. See discussion on [Zulip](https://leanprover.zulipchat.com/#narrow/stream/116395-maths/topic/Semicontinuity.20definition.20for.20non-linear.20orders/near/432898278) - add new `iff` lemmas for unfolding the definition - add `iff` lemmas with the old definition in the linearly ordered case - some basic lemmas need to be changed in an easy way - minimize assumptions for continuity => semicontinuity - prove the semicontinuity criterion for indicators using "preimage of Ici/Iic" instead of a direct proof, because the proof is more natural (especially because we have no `filter_upwards` for `Frequently`) - in the rest of the file (which is about linear orders anyway), we don't touch the statements and just rewrite to the old definition. Some of these could be generalized, but we keep that for a later PR. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict WIP t-topology 274/130 Mathlib/Analysis/BoundedVariation.lean,Mathlib/MeasureTheory/Integral/FundThmCalculus.lean,Mathlib/Order/Filter/Basic.lean,Mathlib/Topology/Semicontinuous.lean 4 0 [] nobody
645-39618
1 year ago
unknown
0-0
0 seconds
11393 mcdoll
author:mcdoll
 feat(Analysis/Distribution/SchwartzSpace): The Heine-Borel property --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict WIP t-analysis 688/3 Mathlib.lean,Mathlib/Analysis/Distribution/SchwartzSpace.lean,Mathlib/Topology/Constructions.lean,Mathlib/Topology/UniformSpace/Ascoli.lean,Mathlib/Topology/UniformSpace/Pi.lean,Mathlib/Topology/UniformSpace/UniformConvergenceTopology.lean 6 0 [] nobody
645-39584
1 year ago
unknown
0-0
0 seconds
9444 erdOne
author:erdOne
 feat: Various instances regarding `𝓞 K`. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict help-wanted t-number-theory 27/0 Mathlib/NumberTheory/NumberField/Basic.lean,Mathlib/RingTheory/IntegralClosure.lean 2 9 ['erdOne', 'leanprover-bot', 'mattrobball', 'riccardobrasca', 'xroblot'] nobody
645-39503
1 year ago
867-38930
867 days ago
1-62292
1 day
8931 hmonroe
author:hmonroe
 feat(Computable): define P, NP, and NP-complete Revised to focus on languages that are binary strings, given the issue of non-acceptable encodings of unspecified Types --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-computability awaiting-author 381/5 Mathlib.lean,Mathlib/Computability/Complexity copy.lean,Mathlib/Computability/Complexity.lean,Mathlib/Computability/Encoding.lean,Mathlib/Computability/TMComputable.lean,Mathlib/Computability/TuringMachine.lean,Mathlib/Computability/halting example.lean,docs/references.bib 8 3 ['fpvandoorn', 'github-actions', 'hmonroe'] nobody
645-39468
1 year ago
801-48850
801 days ago
93-64275
93 days
10387 adomani
author:adomani
 feat(Tactic/ComputeDegree): add `polynomial` tactic Introducing the `polynomial` tactic, summing up `compute_degree, monicity` and adding support for `leadingCoeff`. This is more of a proof of concept: if there is interest in this tactic, I can polish it up. See [this Zulip discussion](https://leanprover.zulipchat.com/#narrow/stream/113489-new-members/topic/Compute.20roots.20of.20polynomials/near/420713624). --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) WIP RFC t-meta 24/0 Mathlib/Tactic/ComputeDegree.lean 1 0 [] nobody
645-39290
1 year ago
689-22320
689 days ago
143-73801
143 days
9154 FR-vdash-bot
author:FR-vdash-bot
 feat: `npow` / `nsmul` / `Nat.cast`/ `zpow` / `zsmul` implemented using `Nat.binaryRec` --- - [ ] depends on: https://github.com/leanprover/lean4/pull/3756 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict awaiting-author t-algebra blocked-by-other-PR
label:t-algebra$
 168/359 Mathlib/Algebra/Group/Defs.lean,Mathlib/Computability/PartrecCode.lean,Mathlib/Computability/Primrec.lean,Mathlib/Data/Bool/Basic.lean,Mathlib/Data/Int/Bitwise.lean,Mathlib/Data/Nat/Bits.lean,Mathlib/Data/Nat/Bitwise.lean,Mathlib/Data/Nat/Digits.lean,Mathlib/Data/Nat/EvenOddRec.lean,Mathlib/Data/Nat/Fib/Basic.lean,Mathlib/Data/Nat/Multiplicity.lean,Mathlib/Data/Nat/Order/Basic.lean,Mathlib/Data/Nat/Parity.lean,Mathlib/Data/Nat/Size.lean,Mathlib/Data/Num/Lemmas.lean,Mathlib/Init/Data/Nat/Bitwise.lean,Mathlib/LinearAlgebra/TensorProduct/Graded/Internal.lean,Mathlib/Logic/Basic.lean,Mathlib/Logic/Denumerable.lean,Mathlib/Logic/Encodable/Basic.lean,Mathlib/Logic/Equiv/Basic.lean,Mathlib/Logic/Equiv/Nat.lean,lake-manifest.json,lakefile.lean,test/zmod.lean 25 7 ['astrainfinita', 'eric-wieser', 'kim-em', 'leanprover-community-mathlib4-bot'] nobody
645-39081
1 year ago
unknown
0-0
0 seconds
6603 tydeu
author:tydeu
 feat: automatically try `cache get` before build --- A quick proof-of-concept. With this, `lake build` will always try `cache get` before building mathlib. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict WIP CI 29/0 lakefile.lean 1 3 ['kim-em', 'tydeu'] nobody
645-39055
1 year ago
999-55578
999 days ago
11-2031
11 days
6058 apurvnakade
author:apurvnakade
 feat: duality theory for cone programs This PR tracks the development of duality theory for cone programs. [Reference](https://ti.inf.ethz.ch/ew/courses/ApproxSDP09/notes/conelp.pdf) --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) - [x] depends on: #6059 - [ ] define direct sum of cones - [ ] weak duality - [ ] regular duality - [ ] slater condition - [ ] strong duality merge-conflict WIP t-analysis 159/0 Mathlib.lean,Mathlib/Analysis/Convex/Cone/ConeLinearProgram.lean 2 1 ['leanprover-community-mathlib4-bot'] nobody
645-39000
1 year ago
1034-75908
1034 days ago
0-9
9 seconds
6449 ADedecker
author:ADedecker
 feat: functions with finite fibers --- This has been discussed before on [Zulip](https://leanprover.zulipchat.com/#narrow/stream/217875-Is-there-code-for-X.3F/topic/.E2.9C.94.20Cofinite.20maps.3F) and it came up again while working with @kkytola's student. As explained in the docstring, we could absolutely just use `Tendsto f cofinite cofinite` all the time, but (1) we lack some API for it (2) the API is nicer to setup if we have a separate def (e.g for dot notation) and (3) mentioning filters for such a simple concept is really not beginner-friendly. I'm not sure at all about the name. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict awaiting-author t-topology 203/0 Mathlib.lean,Mathlib/Logic/Function/HasFiniteFibers.lean,Mathlib/Order/Filter/Basic.lean,Mathlib/Order/Filter/Cofinite.lean 4 14 ['ADedecker', 'YaelDillies', 'alexjbest', 'kkytola'] nobody
645-38994
1 year ago
1011-37048
1011 days ago
6-70040
6 days
13163 erdOne
author:erdOne
 feat(.vscode/module-docstring.code-snippet): Prevent auto-complete from firing on `do` --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) awaiting-author t-meta 5/0 .vscode/module-docstring.code-snippets 1 5 ['erdOne', 'grunweg', 'robertylewis', 'trivial1711'] nobody
645-37604
1 year ago
677-51796
677 days ago
50-78405
50 days
13791 digama0
author:digama0
 refactor: Primrec and Partrec General cleanup of the `Primrec` and `Partrec` files, to better adjust to lean 4 things. The main user-visible change is that `Primrec₂` is no longer a `def` but an `abbrev`, because it was causing inference issues in lean 4. I also removed all the nonterminal `simp`s in `PartrecCode.lean`. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-computability tech debt 585/778 Mathlib/Computability/Ackermann.lean,Mathlib/Computability/Halting.lean,Mathlib/Computability/Partrec.lean,Mathlib/Computability/PartrecCode.lean,Mathlib/Computability/Primrec.lean 5 2 ['github-actions', 'grunweg'] nobody
642-6139
1 year ago
705-82125
705 days ago
1-84718
1 day
11964 adamtopaz
author:adamtopaz
 feat: The functor of points of a scheme We construct the functor of points functor, and prove that it's full and faithful. --- - [x] depends on: #11947 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-algebraic-geometry t-category-theory 210/0 Mathlib.lean,Mathlib/AlgebraicGeometry/FunctorOfPoints.lean,Mathlib/AlgebraicGeometry/OpenImmersion.lean 3 4 ['github-actions', 'grunweg'] nobody
642-5998
1 year ago
770-22939
770 days ago
0-1223
20 minutes
12418 rosborn
author:rosborn
 style: replace preimage_val with ↓∩ notation --- This is a rough draft of what the new `↓∩` notation would look like within mathlib. I believe this is an improvement in clarity and would like to have `↓∩` as a standard notation (along with `''`, `⁻¹'`, `↑`, etc...). As `↓∩` is specialized for `Set`s, I have only changed `preimage_val` when the left-hand side of `↓∩` is a `Set`. The introduction of the `↓∩` notation to Data.Set.Image is temporary as it isn't possible to import Data.Set.Subset directly. If we want `↓∩` unscoped, where would be the best place to define it? An option is Data.Set.Defs, but the notation cannot be defined without additional imports as the file does not import `notation3`. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict 56/61 Mathlib/Analysis/InnerProductSpace/Projection.lean,Mathlib/Data/Set/Function.lean,Mathlib/Data/Set/Image.lean,Mathlib/Data/Set/Subset.lean,Mathlib/MeasureTheory/Constructions/Polish.lean,Mathlib/MeasureTheory/MeasurableSpace/Basic.lean,Mathlib/MeasureTheory/Measure/Restrict.lean,Mathlib/Order/UpperLower/Basic.lean,Mathlib/Topology/Bases.lean,Mathlib/Topology/Clopen.lean,Mathlib/Topology/Connected/Basic.lean,Mathlib/Topology/Connected/PathConnected.lean,Mathlib/Topology/Constructions.lean,Mathlib/Topology/ContinuousOn.lean,Mathlib/Topology/LocalAtTarget.lean,Mathlib/Topology/LocallyConstant/Basic.lean,Mathlib/Topology/Separation.lean,Mathlib/Topology/Sober.lean 18 3 ['grunweg', 'rosborn'] nobody
642-5897
1 year ago
728-15881
728 days ago
29-50022
29 days
9978 FR-vdash-bot
author:FR-vdash-bot
 chore(FieldTheory/KummerExtension): move some lemmas earlier --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict awaiting-author t-algebra
label:t-algebra$
 197/177 Mathlib.lean,Mathlib/Data/Polynomial/FieldDivision.lean,Mathlib/FieldTheory/KummerExtension.lean,Mathlib/RingTheory/AdjoinRoot.lean,Mathlib/RingTheory/Polynomial/Irreducible.lean 5 5 ['alreadydone', 'grunweg', 'riccardobrasca'] nobody
642-5689
1 year ago
839-86271
839 days ago
8-83342
8 days
12429 adomani
author:adomani
 feat: toND -- auto-generating natDegree This is an experiment to automatically translate theorems about `degree` to theorems about `natDegree`. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra RFC merge-conflict awaiting-author t-meta
label:t-algebra$
 167/132 Mathlib.lean,Mathlib/Algebra/Polynomial/Degree/Definitions.lean,Mathlib/Algebra/Polynomial/Degree/Lemmas.lean,Mathlib/Algebra/Polynomial/EraseLead.lean,Mathlib/Algebra/Polynomial/HasseDeriv.lean,Mathlib/Algebra/Polynomial/Inductions.lean,Mathlib/Algebra/Polynomial/Mirror.lean,Mathlib/Algebra/Polynomial/Reverse.lean,Mathlib/Tactic.lean,Mathlib/Tactic/ToNatDegree.lean,scripts/noshake.json 11 2 ['adomani', 'grunweg'] nobody
642-5000
1 year ago
753-39073
753 days ago
3-76602
3 days
12751 Command-Master
author:Command-Master
 feat: add lemmas for Nat/Bits, Nat/Bitwise and Nat/Size Remove `@[simp]` from `Nat.bit_false` and `Nat.bit_true`, as `bit0` and `bit1` are deprecated, and add some lemmas to `Bits`, `Bitwise` and `Size`. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-data new-contributor 66/7 Mathlib/Data/Nat/Bits.lean,Mathlib/Data/Nat/Bitwise.lean,Mathlib/Data/Nat/Multiplicity.lean,Mathlib/Data/Nat/Size.lean 4 26 ['Command-Master', 'Rida-Hamadani', 'Ruben-VandeVelde', 'YaelDillies', 'github-actions', 'jcommelin'] nobody
641-27051
1 year ago
676-33273
676 days ago
56-40668
56 days
15448 urkud
author:urkud
 chore(*): deprecate `Option.elim'` Use `Option.elim` instead. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict awaiting-author tech debt 54/50 Mathlib/Algebra/BigOperators/Option.lean,Mathlib/Algebra/MvPolynomial/Equiv.lean,Mathlib/Algebra/MvPolynomial/Variables.lean,Mathlib/Analysis/BoxIntegral/Partition/Additive.lean,Mathlib/Analysis/BoxIntegral/Partition/Basic.lean,Mathlib/Analysis/BoxIntegral/Partition/Split.lean,Mathlib/Analysis/Calculus/LagrangeMultipliers.lean,Mathlib/CategoryTheory/Category/PartialFun.lean,Mathlib/Computability/TMToPartrec.lean,Mathlib/Data/Option/Defs.lean,Mathlib/LinearAlgebra/Basis.lean,Mathlib/Logic/Embedding/Set.lean,Mathlib/Logic/Equiv/Basic.lean,Mathlib/MeasureTheory/OuterMeasure/Induced.lean,Mathlib/NumberTheory/Dioph.lean,Mathlib/Topology/Compactness/Paracompact.lean,Mathlib/Topology/LocallyFinite.lean 17 12 ['Ruben-VandeVelde', 'YaelDillies', 'github-actions', 'grunweg', 'urkud'] nobody
641-16104
1 year ago
650-62266
650 days ago
7-18420
7 days
10350 Shamrock-Frost
author:Shamrock-Frost
 feat(Data/Setoid): add the operations of taking the equivalence class of an element and of saturating a set wrt an equivalence relation I'm open to suggestions about changing the name "saturate", someone on zulip rightly pointed out this is a very overloaded term in math. That said, I think it's unlikely to cause confusion and that there's only one reasonable interpretation in the context of setoids. --- - [x] depends on: #10347 - [x] depends on: #10348 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-data 169/3 Mathlib/Data/Setoid/Basic.lean,Mathlib/Data/Setoid/Partition.lean,Mathlib/Order/Closure.lean 3 1 ['leanprover-community-mathlib4-bot'] nobody
639-29325
1 year ago
758-20953
758 days ago
19-74546
19 days
13573 Shamrock-Frost
author:Shamrock-Frost
 feat: add multivariate polynomial modules Add a type synonym for multivariate polynomials with coefficients in a module. --- Multivariate polynomials with module coefficients are sort of silly, but they sometimes show up in commutative algebra (eg in the definition of a quasi regular sequence). Writing this code involved a lot of copy and pasting from `PolynomialModule` and `MvPolynomial`. The API is definitely lacking at this stage but it's a start. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict awaiting-author t-algebra
label:t-algebra$
 691/6 Mathlib.lean,Mathlib/Algebra/MvPolynomial/Module/Basic.lean,Mathlib/Algebra/MvPolynomial/Module/MvAEval.lean,Mathlib/Algebra/Polynomial/Module/Basic.lean 4 9 ['Shamrock-Frost', 'erdOne', 'github-actions'] nobody
639-29305
1 year ago
675-21673
675 days ago
39-72752
39 days
6517 MohanadAhmed
author:MohanadAhmed
 feat: discrete Fourier transform of a finite sequence # Discrete Fourier Transform (DFT) Matrix and DFT of a (finite) sequence This file defines the `dft` opertaion on a sequence (also a vecotr) and the DFT operation matrix ## Main definitions - `dft v`: given a sequence (v : (Fin n) → ℂ) we can transform it into a sequence (V : (Fin n) →ℂ) such that $$V [p] = ∑_{k = 0}^{N - 1} e^{-j*2πkp/n} v [k]$$ - `idft V` : given a sequence (V : (Fin n) → ℂ) we can transform it into a sequence (v : (Fin n) → ℂ) such that $$v [k] = \frac{1}{N}∑_{p = 0}^{n - 1} e^{j*2πkp/N} v [p]$$ - `dftMatrix n` : the dft matrix of dimensions $n \times n$ with the `k, p` entry equal to $$Wₙ[k, p] = e^{-j2πkp/n}$$ - `(dftMatrix n)⁻¹` : the idft matrix of dimensions $n \times n$ with the `k, p` entry equal to $$Wₙ[k, p] = (1/N) e^{j2πkp/n}$$ ## Main results - `dft v = (dftMatrix n) v` : the dft operation on a sequence is the same as the dft matrix applied to the vector - `idft V = (dftMatrix n)⁻¹ V` : the idft operation on a sequence is the same as the idft matrix applied to the vector - `dft (idft v) = dft ( idft v) = v` the dft and idft operations are inverses - `Wₙ = vandermonde (w)` : the dft matrix is vandermonde with `w` being the first row of the dft matrix - `circulant t = (dftMatrix n)⁻¹ ⬝ diagonal (dft t) ⬝ (dftMatrix n)` : a circulant matrix is diagonalizable by the dft and idft matrix pair. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict awaiting-author t-algebra
label:t-algebra$
 294/0 Mathlib.lean,Mathlib/LinearAlgebra/Matrix/DFT.lean 2 26 ['MohanadAhmed', 'ericrbg'] nobody
639-29143
1 year ago
948-53359
948 days ago
65-20427
65 days
13155 alreadydone
author:alreadydone
 feat(NumberTheory/EllipticDivisibilitySequence): show elliptic relations follow from even-odd recursion This PR is centered around the (generalized) elliptic relations (`rel₄`) $E(a,b,c,d): W_{a+b}W_{a-b}W_{c+d}W_{c-d}=W_{a+c}W_{a-c}W_{b+d}W_{b-d}-W_{a+d}W_{a-d}W_{b+c}W_{b-c}$. For an integer-indexed sequence W valued in a commutative ring, the relation makes sense only when a,b,c,d are all integers or all half integers. For convenience of formalization, we instead consider integers a,b,c,d of the same parity and divide all subscripts by 2. We extract the subexpression $W_{(a+b)/2}W_{(a-b)/2}$ (which appear six times) as `addMulSub W a b`. The collection of all $E(a,b,c,d)$ is equivalent to Stange's axiom for elliptic nets (`net`), and the literature (e.g. Silverman) commonly consider only the three-index special case $E(m,n,r,0)$ (`Rel₃`). Important special cases of these relations are (i) $E(m+1,m,1,0): W_{2m+1}W_1^3=W_{m+2}W_m^3-W_{m+1}^3 W_{m-1}$ (`oddRec`) and (ii) $E(m+1,m-1,1,0): W_{2m}W_2 W_1^2=W_m(W_{m+2}W_{m-1}^2-W_{m-2}W_{m+1}^2)$ (`evenRec`), which suffice to uniquely specify $W$ on all positive integers recursively from four initial values $W_1, W_2, W_3, W_4$ (`IsEllSequence.ext`, if $W_1 W_2$ is not a zero divisor). In the usual setting where $W_1=1$ and $W_2\mid W_4$, there does exist a sequence (`normEDS`) satisfying (i) and (ii) given initial values $W_2, W_3$ and $W_4/W_2$. It turns out the same non-zerodivisor condition also guarantees that W is an odd function with $W_0=0$, which naturally extends W to all integers. The main result of this PR (`rel₄_of_oddRec_evenRec`, `IsEllSequence.of_oddRec_evenRec`) is a purely algebraic proof that the sequence W defined by the single-parameter elliptic relations (i) and (ii) implies all $E(a,b,c,d)$, based on my original argument first published on [Math.SE](https://math.stackexchange.com/a/4903422/12932). It's based on the observation that a nonzerodivisor-multiple of $E(a,b,c,d)$ can be expressed as a linear combination of various $E(a,b,c_\min,d_\min)$ with the two smallest indices fixed at their minimal possible values, which can be transformed (`transf`) to an elliptic relation with smaller `a` (which can be assumed to hold by induction), unless they are of the form (i) or (ii) which hold by assumption. For this argument it's necessary to assume `a > b > c > d ≥ 0` (see `StrictAnti₄` and `Rel₄OfValid`), but it's easy to extend to arbitrary a,b,c,d by symmetry properties of `rel₄` under negation and permutations of indices. In the subsequent PR #13057, we show all normalized EDSs (`normEDS`), defined using the even-odd recursion (i)-(ii), are elliptic (i.e. satisfy the elliptic relations) divisibility sequences. This PR doesn't directly apply because a normEDS doesn't always satisfy the nonzerodivisor condition, but they are specializations of the universal normEDS, which does satisfy the condition. The technique of reducing to the universal case will be applied many times, and relies on the naturality (`map`) lemmas. We also change the `ℕ` in the definition `IsDivSequence` to `ℤ` which is more natural given that W is a `ℤ`-indexed sequence. --- - [x] depends on: #13153 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-algebra awaiting-author t-number-theory
label:t-algebra$
 565/12 Mathlib/NumberTheory/EllipticDivisibilitySequence.lean 1 55 ['Multramate', 'alreadydone', 'github-actions', 'grunweg', 'leanprover-community-mathlib4-bot'] nobody
633-42747
1 year ago
682-44634
682 days ago
26-39367
26 days
15600 adomani
author:adomani
 feat: lint also `let` vs `have` --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict WIP t-linter 77/26 Mathlib/Tactic/Linter/HaveLetLinter.lean,test/HaveLetLinter.lean 2 1 ['github-actions'] nobody
632-11023
1 year ago
653-4721
653 days ago
0-8
8 seconds
16253 Shreyas4991
author:Shreyas4991
 feat: Basics of Discrete Fair Division in Mathlib This PR adds the basics of discrete fair division in mathlib. We include the definitions of allocations, valuations, properties of valuations, and the following notions : Envy-Freeness (EF), Envy-Freeness upto 1 good (EF1), and envy freeness upto any good (EFX). We also include the various implications between these notions. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) WIP awaiting-author 144/0 Mathlib/GameTheory/FairDivision/Discrete/Basic.lean 1 9 ['Shreyas4991', 'eric-wieser', 'github-actions'] nobody
631-8936
1 year ago
631-13197
631 days ago
0-20853
5 hours
15121 Eloitor
author:Eloitor
 feat: iff theorems for IsSplitEpi and IsSplitMono in opposite category --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) awaiting-author t-category-theory new-contributor 40/0 Mathlib/CategoryTheory/EpiMono.lean 1 3 ['github-actions', 'joelriou', 'mattrobball'] nobody
628-1886
1 year ago
659-47545
659 days ago
7-3203
7 days
15895 madvorak
author:madvorak
 feat(Computability/ContextFreeGrammar): mapping between two types of nonterminal symbols --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-computability WIP 172/0 Mathlib/Computability/ContextFreeGrammar.lean 1 43 ['YaelDillies', 'github-actions', 'madvorak'] nobody
627-18679
1 year ago
631-52188
631 days ago
1-43047
1 day
14038 adomani
author:adomani
 test/decl diff in lean dev --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict WIP 231/2 .github/workflows/bors.yml,.github/workflows/build.yml,.github/workflows/build.yml.in,.github/workflows/build_fork.yml,.github/workflows/mk_build_yml.sh,Mathlib/Tactic/Eval.lean,scripts/decls_diff_hybrid.sh,scripts/list_decls.lean 8 3 ['github-actions'] nobody
626-26739
1 year ago
698-83258
698 days ago
0-8
8 seconds
7861 shuxuezhuyi
author:shuxuezhuyi
 feat(Geometry/Hyperbolic/UpperHalfPlane): instance IsometricSMul PSL(2, ℝ) ℍ --- - [ ] depends on: #7835 - [ ] depends on: #7791 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict blocked-by-other-PR t-euclidean-geometry 98/0 Mathlib.lean,Mathlib/Geometry/Hyperbolic/UpperHalfPlane/Basic.lean,Mathlib/LinearAlgebra/Matrix/ProjectiveSpecialLinearGroup.lean 3 1 ['leanprover-community-mathlib4-bot'] nobody
620-49080
1 year ago
681-3208
681 days ago
43-50453
43 days
16570 yuma-mizuno
author:yuma-mizuno
 chore(Tactic/CategoryTheory): change `TermElabM` to `MetaM` Separated from #15335. To use `Qq`, we need to modify `Qq` to support universe matching. See [Zulip](https://leanprover.zulipchat.com/#narrow/stream/144837-PR-reviews/topic/.2315335.20meta.20code.20for.20monoidal.20categories). --- - [ ] depends on: #15335 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) WIP t-meta 26/15 Mathlib/Tactic/CategoryTheory/BicategoryCoherence.lean,Mathlib/Tactic/CategoryTheory/Coherence.lean 2 3 ['github-actions', 'mathlib4-dependent-issues-bot', 'mergify'] nobody
620-25545
1 year ago
unknown
0-0
0 seconds
10591 adri326
author:adri326
 feat(Topology/Algebra/ConstMulAction): properties of continuous actions in Hausdorff spaces Defines some useful properties of `ContinuousConstSMul` group actions on Hausdorff spaces: - `MulAction.isClosed_fixedBy`, which proves that the `fixedBy α m` set is closed - `t2_separation_smul`, which constructs an open set `s` such that `s` and `g • s` are disjoint - `Set.InjOn.t2_separation_smul`, the extension of `t2_separation_smul` to a set of group elements whose action is injective --- This PR belongs my series of PR around the formalization of Rubin's theorem. `MulAction.isClosed_fixedBy` is used in several places along the proof, and the separation lemmas are primarily used in showing that `(fixedBy α g)ᶜ` and `(fixedBy α h)ᶜ` are disjoint under some intricate but fully group-theoretic condition. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-topology awaiting-author t-algebra
label:t-algebra$
 57/0 Mathlib/Topology/Algebra/ConstMulAction.lean 1 9 ['ADedecker', 'adri326', 'j-loreaux', 'jcommelin'] ADedecker
assignee:ADedecker
619-17537
1 year ago
771-30279
771 days ago
55-82204
55 days
7545 shuxuezhuyi
author:shuxuezhuyi
 feat: APIs of `Function.extend f g e'` when `f` is injective We characterizes `range g`, `Injective g`, `Surjective g` and `Bijective g` in terms of `extend f g e'`.​ --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict awaiting-author t-logic 50/0 Mathlib.lean,Mathlib/Logic/Function/ApiForExtend.lean 2 1 ['fpvandoorn'] nobody
618-61912
1 year ago
927-9694
927 days ago
32-32325
32 days
14078 Ruben-VandeVelde
author:Ruben-VandeVelde
 feat(CI): continue after mk_all fails --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict awaiting-author CI 43/0 .github/workflows/bors.yml,.github/workflows/build.yml,.github/workflows/build.yml.in,.github/workflows/build_fork.yml,Mathlib/Data/Nat/Test.lean 5 2 ['bryangingechen', 'github-actions'] nobody
614-71145
1 year ago
697-37705
697 days ago
0-13311
3 hours
11283 hmonroe
author:hmonroe
 feat(ModelTheory/Satisfiability): define theory with independent sentence --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict WIP t-logic 8/0 Mathlib/ModelTheory/Satisfiability.lean 1 2 ['fpvandoorn', 'hmonroe'] nobody
612-41699
1 year ago
799-15369
799 days ago
3-63452
3 days
16914 siddhartha-gadgil
author:siddhartha-gadgil
 Loogle syntax with non-reserved This is PR mainly to test that loogle syntax does not break stuff downstream --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict WIP 4/4 lake-manifest.json,lakefile.lean 2 1 ['github-actions'] nobody
610-30308
1 year ago
611-27397
611 days ago
0-14835
4 hours
13782 alreadydone
author:alreadydone
 feat(EllipticCurve): ZSMul formula in terms of division polynomials The formula $[n]P = (\phi_n(x,y) : \omega_n(x,y) : \psi_n(x,y))$ in Jacobian coordinates for $P=(x,y)$ a nonsingular point on a Weierstrass/elliptic curve. --- - [x] depends on: #12883 - [x] depends on: #13399 - [ ] depends on: #13057 - [ ] depends on: #13155 - [x] depends on: #13845 - [x] depends on: #13846 - [ ] depends on: #13847 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra t-number-theory blocked-by-other-PR merge-conflict t-algebraic-geometry
label:t-algebra$
 2462/232 Mathlib.lean,Mathlib/Algebra/MvPolynomial/PDeriv.lean,Mathlib/Algebra/Polynomial/Bivariate.lean,Mathlib/AlgebraicGeometry/EllipticCurve/Affine.lean,Mathlib/AlgebraicGeometry/EllipticCurve/DivisionPolynomial/Basic.lean,Mathlib/AlgebraicGeometry/EllipticCurve/DivisionPolynomial/ZSMul.lean,Mathlib/AlgebraicGeometry/EllipticCurve/Group.lean,Mathlib/AlgebraicGeometry/EllipticCurve/Jacobian.lean,Mathlib/AlgebraicGeometry/EllipticCurve/Universal.lean,Mathlib/NumberTheory/EllipticDivisibilitySequence.lean 10 8 ['Multramate', 'alreadydone', 'github-actions', 'leanprover-community-mathlib4-bot'] nobody
607-79673
1 year ago
unknown
0-0
0 seconds
8118 iwilare
author:iwilare
 feat(CategoryTheory): add dinatural transformations A starting point to define [dinatural transformations](https://ncatlab.org/nlab/show/dinatural+transformation). This is my first PR so style comments and improvements are very welcome! --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict awaiting-author t-category-theory 147/7 Mathlib.lean,Mathlib/CategoryTheory/DinatTrans.lean,Mathlib/CategoryTheory/Functor/Category.lean,Mathlib/CategoryTheory/Products/Bifunctor.lean 4 49 ['Shamrock-Frost', 'github-actions', 'iwilare', 'joelriou'] Shamrock-Frost
assignee:Shamrock-Frost
605-52594
1 year ago
709-33071
709 days ago
21-30729
21 days
14242 js2357
author:js2357
 feat: Prove equivalence of `isDedekindDomain` and `isDedekindDomainDvr` Prove that `isDedekindDomainDvr` is equivalent to both `isDedekindDomain` and `isDedekindDomainInv`. Specifically, prove `isDedekindDomainDvr A → isDedekindDomainInv A`, because `isDedekindDomain A → isDedekindDomainDvr A` and `IsDedekindDomain A ↔ IsDedekindDomainInv A` are already in Mathlib. - [x] depends on: #14099 - [x] depends on: #14216 - [ ] depends on: #14237 --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-algebra blocked-by-other-PR new-contributor
label:t-algebra$
 269/1 Mathlib.lean,Mathlib/RingTheory/DedekindDomain/Dvr.lean,Mathlib/RingTheory/FractionalIdeal/LocalizedAtPrime.lean,Mathlib/RingTheory/Localization/Basic.lean 4 2 ['github-actions', 'leanprover-community-mathlib4-bot'] nobody
605-12945
1 year ago
693-1892
693 days ago
0-273
4 minutes
7516 ADedecker
author:ADedecker
 perf: use `abbrev` to prevent unifying useless data --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict WIP 4/3 Mathlib/Topology/ContinuousFunction/Bounded.lean 1 3 ['ADedecker', 'leanprover-bot', 'mattrobball'] nobody
599-69347
1 year ago
960-33564
960 days ago
0-16
16 seconds
17127 FR-vdash-bot
author:FR-vdash-bot
 chore: remove global `Quotient.mk` `⟦·⟧` notation --- Merge this PR when we are ready to migrate to `QuotLike` API (#16421). [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-data 137/2 Counterexamples/Pseudoelement.lean,Mathlib/Algebra/Associated/Basic.lean,Mathlib/Algebra/BigOperators/Group/Finset.lean,Mathlib/Algebra/Group/Conj.lean,Mathlib/Algebra/GroupWithZero/NonZeroDivisors.lean,Mathlib/Algebra/Order/CauSeq/Completion.lean,Mathlib/Algebra/Quandle.lean,Mathlib/AlgebraicGeometry/EllipticCurve/Jacobian.lean,Mathlib/AlgebraicGeometry/EllipticCurve/Projective.lean,Mathlib/AlgebraicTopology/FundamentalGroupoid/Basic.lean,Mathlib/AlgebraicTopology/FundamentalGroupoid/FundamentalGroup.lean,Mathlib/AlgebraicTopology/FundamentalGroupoid/InducedMaps.lean,Mathlib/AlgebraicTopology/FundamentalGroupoid/Product.lean,Mathlib/AlgebraicTopology/FundamentalGroupoid/SimplyConnected.lean,Mathlib/CategoryTheory/Abelian/Pseudoelements.lean,Mathlib/CategoryTheory/Limits/Shapes/SingleObj.lean,Mathlib/CategoryTheory/Monoidal/Free/Basic.lean,Mathlib/CategoryTheory/Monoidal/Free/Coherence.lean,Mathlib/CategoryTheory/Skeletal.lean,Mathlib/Data/Finset/Card.lean,Mathlib/Data/Fintype/List.lean,Mathlib/Data/Fintype/Quotient.lean,Mathlib/Data/Multiset/Basic.lean,Mathlib/Data/QPF/Multivariate/Constructions/Fix.lean,Mathlib/Data/QPF/Univariate/Basic.lean,Mathlib/Data/Quot.lean,Mathlib/Data/Real/Basic.lean,Mathlib/Data/Set/Finite.lean,Mathlib/Data/Set/Image.lean,Mathlib/Data/Setoid/Basic.lean,Mathlib/GroupTheory/GroupAction/Basic.lean,Mathlib/GroupTheory/GroupAction/Quotient.lean,Mathlib/LinearAlgebra/Dual.lean,Mathlib/LinearAlgebra/Ray.lean,Mathlib/Logic/Encodable/Basic.lean,Mathlib/Logic/Equiv/Basic.lean,Mathlib/ModelTheory/DirectLimit.lean,Mathlib/ModelTheory/Fraisse.lean,Mathlib/ModelTheory/Quotients.lean,Mathlib/NumberTheory/NumberField/CanonicalEmbedding/FundamentalCone.lean,Mathlib/NumberTheory/NumberField/Embeddings.lean,Mathlib/NumberTheory/NumberField/Units/DirichletTheorem.lean,Mathlib/NumberTheory/Padics/PadicIntegers.lean,Mathlib/NumberTheory/Padics/PadicNumbers.lean,Mathlib/Order/RelIso/Basic.lean,Mathlib/RepresentationTheory/Action/Concrete.lean,Mathlib/SetTheory/Cardinal/Basic.lean,Mathlib/SetTheory/Cardinal/Ordinal.lean,Mathlib/SetTheory/Game/Basic.lean,Mathlib/SetTheory/Game/Birthday.lean,Mathlib/SetTheory/Game/Impartial.lean,Mathlib/SetTheory/Game/Ordinal.lean,Mathlib/SetTheory/Game/State.lean,Mathlib/SetTheory/Lists.lean,Mathlib/SetTheory/Ordinal/Arithmetic.lean,Mathlib/SetTheory/Ordinal/Basic.lean,Mathlib/SetTheory/Surreal/Basic.lean,Mathlib/SetTheory/Surreal/Dyadic.lean,Mathlib/SetTheory/Surreal/Multiplication.lean,Mathlib/SetTheory/ZFC/Basic.lean,Mathlib/SetTheory/ZFC/Rank.lean,Mathlib/Topology/Connected/PathConnected.lean,Mathlib/Topology/Homotopy/HomotopyGroup.lean,Mathlib/Topology/Homotopy/Path.lean,Mathlib/Topology/Homotopy/Product.lean,Mathlib/Topology/MetricSpace/GromovHausdorff.lean,Mathlib/Topology/UniformSpace/Separation.lean,test/interactiveUnfold.lean 68 1 ['github-actions'] nobody
599-64390
1 year ago
599-64390
599 days ago
4-72805
4 days
16887 metinersin
author:metinersin
 feat(ModelTheory/Complexity): define conjunctive and disjunctive formulas Defines `FirstOrder.Language.BoundedFormula.IsConjunctive` and `FirstOrder.Language.BoundedFormula.IsDisjunctive`. --- - [ ] depends on: #16885 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict blocked-by-other-PR new-contributor t-logic 300/7 Mathlib/ModelTheory/Complexity.lean,Mathlib/ModelTheory/Equivalence.lean,Mathlib/ModelTheory/Syntax.lean 3 2 ['github-actions', 'mathlib4-dependent-issues-bot'] nobody
597-8923
1 year ago
612-36997
612 days ago
0-1299
21 minutes
16888 metinersin
author:metinersin
 feat(ModelTheory/Complexity): Define conjunctive and disjunctive normal forms Define `FirstOrder.Language.BoundedFormula.IsDNF` and `FirstOrder.Language.BoundedFormula.IsCNF`. --- - [ ] depends on: #16887 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict blocked-by-other-PR new-contributor t-logic 415/7 Mathlib/ModelTheory/Complexity.lean,Mathlib/ModelTheory/Equivalence.lean,Mathlib/ModelTheory/Syntax.lean 3 2 ['github-actions', 'mathlib4-dependent-issues-bot'] nobody
597-8923
1 year ago
612-36998
612 days ago
0-1045
17 minutes
16889 metinersin
author:metinersin
 feat(ModelTheory/Complexity): Normal forms Defines `FirstOrder.Language.BoundedFormula.toDNF` and `FirstOrder.Language.BoundedFormula.toCNF` - given a quantifier-free formula, these construct a semantically equivalent formula in disjunctive normal form and conjunctive normal form, respectively. --- - [ ] depends on: #16888 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict blocked-by-other-PR new-contributor t-logic 525/7 Mathlib/ModelTheory/Complexity.lean,Mathlib/ModelTheory/Equivalence.lean,Mathlib/ModelTheory/Syntax.lean 3 2 ['github-actions', 'mathlib4-dependent-issues-bot'] nobody
597-8922
1 year ago
612-32748
612 days ago
0-613
10 minutes
5995 FR-vdash-bot
author:FR-vdash-bot
 feat: add APIs about `Quotient.choice` Some docs in this PR refer to the definition in #5576. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict awaiting-author RFC t-data 76/6 Mathlib/Data/Quot.lean 1 3 ['YaelDillies', 'astrainfinita', 'gebner'] eric-wieser
assignee:eric-wieser
590-23132
1 year ago
715-43793
715 days ago
285-35716
285 days
13156 erdOne
author:erdOne
 refactor(Algebra/Module/LocalizedModule): Redefine `LocalizedModule` in terms of `OreLocalization`. --- - [x] depends on: #13151 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-algebra
label:t-algebra$
 519/628 Mathlib.lean,Mathlib/Algebra/Module/LocalizedModule.lean,Mathlib/AlgebraicGeometry/Modules/Tilde.lean,Mathlib/RingTheory/DedekindDomain/Different.lean,Mathlib/RingTheory/Localization/BaseChange.lean,Mathlib/RingTheory/OreLocalization/Basic.lean,Mathlib/RingTheory/OreLocalization/Module.lean,Mathlib/RingTheory/OreLocalization/Ring.lean 8 4 ['github-actions', 'leanprover-bot', 'leanprover-community-mathlib4-bot', 'mattrobball'] nobody
585-30272
1 year ago
585-30272
585 days ago
51-84473
51 days
16348 urkud
author:urkud
 refactor(Topology): require `LinearOrder` with `OrderTopology` While the definition formally makes sense for a preorder, this topology is usually not the right one for a non-linear order (e.g., `Real × Real`). See [Zulip thread](https://leanprover.zulipchat.com/#narrow/stream/287929-mathlib4/topic/Open.20Ioi) --- This PR doesn't cleanup any API, I'm going to do it in a later PR. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict awaiting-author t-topology t-order 33/46 Mathlib/Analysis/Asymptotics/SuperpolynomialDecay.lean,Mathlib/Topology/Algebra/Order/LiminfLimsup.lean,Mathlib/Topology/Instances/Sign.lean,Mathlib/Topology/Order/Basic.lean,Mathlib/Topology/Order/Filter.lean,Mathlib/Topology/Order/MonotoneContinuity.lean 6 10 ['YaelDillies', 'github-actions', 'jcommelin', 'urkud'] nobody
585-29896
1 year ago
625-62230
625 days ago
3-83049
3 days
13965 pechersky
author:pechersky
 feat(Data/DigitExpansion): reals via digit expansion are complete --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) - [ ] depends on: #13964 merge-conflict blocked-by-other-PR t-data 3876/0 Mathlib.lean,Mathlib/Data/DigitExpansion/Add.lean,Mathlib/Data/DigitExpansion/Defs.lean,Mathlib/Data/DigitExpansion/Hensel.lean,Mathlib/Data/DigitExpansion/Integer/Basic.lean,Mathlib/Data/DigitExpansion/Integer/Mul.lean,Mathlib/Data/DigitExpansion/Real/Basic.lean,Mathlib/Data/DigitExpansion/Real/CompleteSpace.lean,Mathlib/Data/DigitExpansion/Real/ConditionallyComplete.lean,docs/references.bib 10 4 ['github-actions', 'leanprover-community-mathlib4-bot'] nobody
583-67064
1 year ago
702-13283
702 days ago
0-600
10 minutes
12750 Command-Master
author:Command-Master
 feat: define Gray code --- Define binary reflected gray code, both as a permutation of `Nat` and as a permutation of `BitVec n`, and prove some theorems about them. Additionally, remove `@[simp]` from `Nat.bit_false` and `Nat.bit_true`, as `bit0` and `bit1` are deprecated, and add some lemmas to `Bits`, `Bitwise` and `Size`. - [ ] depends on: #12751 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) blocked-by-other-PR t-data new-contributor merge-conflict awaiting-author 226/0 Mathlib.lean,Mathlib/Data/Nat/Bits.lean,Mathlib/Data/Nat/Bitwise.lean,Mathlib/Data/Nat/GrayCode.lean,Mathlib/Data/Nat/Size.lean 5 5 ['Rida-Hamadani', 'alreadydone', 'github-actions', 'grunweg', 'leanprover-community-mathlib4-bot'] nobody
579-31580
1 year ago
728-13678
728 days ago
16-49744
16 days
13514 madvorak
author:madvorak
 feat(Computability/ContextFreeGrammar): closure under union - [ ] depends on: #15895 --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-computability blocked-by-other-PR 448/4 Mathlib/Computability/ContextFreeGrammar.lean 1 50 ['Rida-Hamadani', 'YaelDillies', 'github-actions', 'leanprover-community-mathlib4-bot', 'madvorak'] nobody
566-42908
1 year ago
644-16889
644 days ago
72-28417
72 days
9654 urkud
author:urkud
 feat: add `@[mk_eq]` version of `@[mk_iff]` The new attribute generates theorems like ```lean List.chain_eq : @List.Chain = fun {α} R a a_1 => a_1 = [] ∨ ∃ b l, R a b ∧ List.Chain R b l ∧ a_1 = b :: l ``` and is useful to rewrite in a theorem that argues about the properties of an unapplied inductive predicate. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict awaiting-author t-meta 63/9 Mathlib/Lean/Meta.lean,Mathlib/Tactic/MkIffOfInductiveProp.lean,test/MkIffOfInductive.lean 3 6 ['Vierkantor', 'github-actions', 'urkud'] nobody
564-75701
1 year ago
836-39000
836 days ago
25-70825
25 days
16704 AntoineChambert-Loir
author:AntoineChambert-Loir
 feat(Mathlib.Data.Ordering.Dickson): Dickson orders Dickson orders are a particular class of well founded orders characterized by the fact that every nonempty set has finitely many minimal elements. They appear in the classical theory of Groebner bases because it is easier to prove that some sets are well founded using this property. WiP. In the `tfae` function, property 2 is exactly `Set.PartiallyWellOrderedOn`, so the PR should be rewritten so as to use that property (and not define `IsDickson`). --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict WIP t-order 324/0 Mathlib.lean,Mathlib/Data/Ordering/Dickson.lean,scripts/noshake.json 3 9 ['AntoineChambert-Loir', 'b-mehta', 'github-actions'] nobody
564-54258
1 year ago
615-43089
615 days ago
2-84515
2 days
16355 Ruben-VandeVelde
author:Ruben-VandeVelde
 feat: odd_{add,sub}_one --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-algebra awaiting-author t-number-theory
label:t-algebra$
 12/0 Mathlib/Algebra/Ring/Int.lean,Mathlib/Algebra/Ring/Parity.lean 2 4 ['Ruben-VandeVelde', 'github-actions', 'urkud'] nobody
564-2055
1 year ago
628-76901
628 days ago
0-57608
16 hours
14598 Command-Master
author:Command-Master
 chore: add typeclasses to unify various `add_top`, `add_eq_top`, etc. Add the four typeclasses `IsTopAbsorbing`, `IsBotAbsorbing`, `NoTopSum`, `NoBotSum`, as additive equivalents for `MulZeroClass` and `NoZeroDivisors`. Add instances of these for `ENNReal`, `WithTop α`, `WithBot α`, `PUnit`, `EReal`, `PartENat`, `Measure`, `Interval` and `Filter`. Also split `Algebra/Order/AddGroupWithTop` to `Algebra/Order/Group/WithTop` and `Algebra/Order/Monoid/WithTop` --- Previous usages of lemmas with quantified names like `WithTop.add_top` have to be changed to just `add_top`. `add_lt_top` is `@[simp]`, in accordance with `ENNReal.add_lt_top` being `@[simp]`. This affects `WithTop.add_lt_top` which previously hadn't been `@[simp]`. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-algebra t-order new-contributor
label:t-algebra$
 264/195 Archive/Wiedijk100Theorems/BallotProblem.lean,Mathlib.lean,Mathlib/Algebra/Order/Group/WithTop.lean,Mathlib/Algebra/Order/GroupWithZero/Canonical.lean,Mathlib/Algebra/Order/Interval/Basic.lean,Mathlib/Algebra/Order/Monoid/Unbundled/Basic.lean,Mathlib/Algebra/Order/Monoid/Unbundled/Defs.lean,Mathlib/Algebra/Order/Monoid/Unbundled/WithTop.lean,Mathlib/Algebra/Order/Monoid/WithTop.lean,Mathlib/Algebra/PUnitInstances/Order.lean,Mathlib/Algebra/Polynomial/Degree/Definitions.lean,Mathlib/Algebra/Polynomial/Monic.lean,Mathlib/Algebra/Tropical/Basic.lean,Mathlib/Analysis/Analytic/Meromorphic.lean,Mathlib/Analysis/Normed/Lp/ProdLp.lean,Mathlib/Analysis/NormedSpace/ENorm.lean,Mathlib/Analysis/SpecialFunctions/JapaneseBracket.lean,Mathlib/Analysis/SpecialFunctions/Log/ENNRealLog.lean,Mathlib/Data/ENNReal/Operations.lean,Mathlib/Data/ENat/Basic.lean,Mathlib/Data/Nat/PartENat.lean,Mathlib/Data/Nat/WithBot.lean,Mathlib/Data/Real/EReal.lean,Mathlib/LinearAlgebra/Lagrange.lean,Mathlib/MeasureTheory/Covering/Differentiation.lean,Mathlib/MeasureTheory/Decomposition/Lebesgue.lean,Mathlib/MeasureTheory/Function/ConditionalExpectation/CondexpL1.lean,Mathlib/MeasureTheory/Function/Jacobian.lean,Mathlib/MeasureTheory/Function/L1Space.lean,Mathlib/MeasureTheory/Function/L2Space.lean,Mathlib/MeasureTheory/Function/LpSeminorm/Basic.lean,Mathlib/MeasureTheory/Function/LpSeminorm/TriangleInequality.lean,Mathlib/MeasureTheory/Function/LpSpace.lean,Mathlib/MeasureTheory/Function/StronglyMeasurable/Basic.lean,Mathlib/MeasureTheory/Function/UniformIntegrable.lean,Mathlib/MeasureTheory/Integral/Bochner.lean,Mathlib/MeasureTheory/Integral/MeanInequalities.lean,Mathlib/MeasureTheory/Integral/SetIntegral.lean,Mathlib/MeasureTheory/Integral/VitaliCaratheodory.lean,Mathlib/MeasureTheory/Measure/Hausdorff.lean,Mathlib/MeasureTheory/Measure/Lebesgue/Basic.lean,Mathlib/MeasureTheory/Measure/LevyProkhorovMetric.lean,Mathlib/MeasureTheory/Measure/MeasureSpace.lean,Mathlib/MeasureTheory/Measure/MeasureSpaceDef.lean,Mathlib/MeasureTheory/Measure/Regular.lean,Mathlib/MeasureTheory/Measure/Typeclasses.lean,Mathlib/NumberTheory/Padics/PadicNumbers.lean,Mathlib/Order/Filter/Pointwise.lean,Mathlib/Probability/Kernel/Defs.lean,Mathlib/Probability/Martingale/Convergence.lean,Mathlib/RingTheory/Multiplicity.lean,Mathlib/RingTheory/MvPowerSeries/NoZeroDivisors.lean,Mathlib/RingTheory/UniqueFactorizationDomain.lean,Mathlib/Topology/EMetricSpace/Defs.lean,Mathlib/Topology/MetricSpace/Bounded.lean,Mathlib/Topology/MetricSpace/HausdorffDistance.lean,Mathlib/Topology/MetricSpace/Lipschitz.lean 57 30 ['Command-Master', 'YaelDillies', 'github-actions'] nobody
562-59856
1 year ago
562-59856
562 days ago
7-45599
7 days
16885 metinersin
author:metinersin
 feat(ModelTheory/Complexity): define literals Defines `FirstOrder.Language.BoundedFormula.IsLiteral` and `FirstOrder.Language.BoundedFormula.simpleNot` - an auxiliary operation that takes the negation of a formula and does some simplification. --- - [x] depends on: #16800 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict awaiting-author new-contributor t-logic 148/5 Mathlib/ModelTheory/Complexity.lean,Mathlib/ModelTheory/Equivalence.lean,Mathlib/ModelTheory/Semantics.lean,Mathlib/ModelTheory/Syntax.lean 4 20 ['YaelDillies', 'awainverse', 'github-actions', 'mathlib4-dependent-issues-bot', 'metinersin'] nobody
560-15977
1 year ago
596-5289
596 days ago
0-19926
5 hours
18716 jjaassoonn
author:jjaassoonn
 feat(Algebra/Module/GradedModule): quotient and subgrading - [ ] depends on: #9820 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) WIP t-algebra blocked-by-other-PR awaiting-CI merge-conflict
label:t-algebra$
 997/191 Counterexamples/HomogeneousPrimeNotPrime.lean,Mathlib.lean,Mathlib/Algebra/Group/Subgroup/Defs.lean,Mathlib/Algebra/Module/GradedModule/Basic.lean,Mathlib/Algebra/Module/GradedModule/QuotientGrading.lean,Mathlib/Algebra/Module/GradedModule/Subgrading.lean,Mathlib/AlgebraicGeometry/ProjectiveSpectrum/Topology.lean,Mathlib/RingTheory/GradedAlgebra/Homogeneous/Ideal.lean,Mathlib/RingTheory/GradedAlgebra/Homogeneous/Submodule.lean,Mathlib/RingTheory/GradedAlgebra/Quotient.lean,Mathlib/RingTheory/GradedAlgebra/Radical.lean,scripts/no_lints_prime_decls.txt 12 2 ['github-actions', 'mathlib4-dependent-issues-bot'] nobody
560-15608
1 year ago
unknown
0-0
0 seconds
9341 winstonyin
author:winstonyin
 feat: Naturality of integral curves Let `v` and `v'` be sections of the tangent bundle of manifolds `M` and `M'`, respectively, and let `f : M → M'` be a differentiable map. Then `f` maps integral curves of `v` to integral curves of `v'` if and only if `v` and `v'` are `f`-related. - [x] depends on: #8483 --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict awaiting-author t-differential-geometry 45/0 Mathlib/Geometry/Manifold/IntegralCurve.lean,Mathlib/Topology/Algebra/Module/Basic.lean 2 9 ['github-actions', 'grunweg', 'leanprover-community-mathlib4-bot', 'winstonyin'] nobody
556-67800
1 year ago
864-37870
864 days ago
0-28222
7 hours
13248 hcWang942
author:hcWang942
 feat: basic concepts of auction theory ## Description Formalise some core concepts and results in auction theory: this includes definitions for first-price and second-price auctions, as well as several fundamental results and helping lemmas. This is the very first PR of the project formalizing core concepts and results in auction theory. Our group is working on more contributions on the formalization of game theory prefix. Co-authored-by: Ma Jiajun ## Reference Roughgarden, Tim. ***Twenty Lectures on Algorithmic Game Theory***. Cambridge University Press, 2020. [Link](https://www.cambridge.org/core/books/twenty-lectures-on-algorithmic-game-theory/A9D9427C8F43E7DAEF8C702755B6D72B) --- - [x] Will depend on #14163 once that PR is merged. The Fintype lemmas introduced by this PR have been added in that PR and will be removed from here once that PR gets merged ## Current plan for formalization of Game Theory The current plan for the formalizing of Game Theory include: #### 1. Auction Theory. 🎉 _(200+ lines, this PR)_ - Essential definitions of Sealed-bid auction, First-price auction and Second-price auction. - First-price auction has no dominant strategy. - Second-price auction has dominant strategy. (Second-price auction is DSIC) #### 2. Mechanism design & Myerson's Lemma. 🎉 (400+ lines, pending for modification to Mathlib Standard) - Mechanism design An allocation rule is implementable if there exists - Dominant Strategy Incentive Compatible (DSIC) payment rule - An allocation rule is monotone if for every bidder’s gain is nondecreasing w.r.t. her/his bid - Myerson's Lemma Implementable ⇔ Monotone In the above case, the DSIC payment rule is unique. #### 3. von Neumann‘s Minimax Theorem. 🎉 (800+ lines, pending for modification to Mathlib Standard) - Equilibrium in zero sum game - Formalization strategy: via Loomis’s theorem. #### 4. Nash Equilibrium. 🎉 (pending for modification to Mathlib Standard) #### 5. Brouwer fixed-point theorem. (Work in Progress) #### 6. More Mechanism design. (Planning) merge-conflict awaiting-author new-contributor t-logic 204/0 Mathlib.lean,Mathlib/GameTheory/Auction/Basic.lean,docs/references.bib 3 148 ['Shreyas4991', 'YaelDillies', 'eric-wieser', 'faenuccio', 'github-actions', 'grunweg', 'hcWang942', 'tb65536', 'urkud', 'vihdzp'] hcWang942
assignee:hcWang942
555-54809
1 year ago
569-40997
569 days ago
109-82807
109 days
9344 erdOne
author:erdOne
 feat: Add `AddGroup.FG` -> `Module.Finite ℤ` as instances --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict awaiting-author t-algebra
label:t-algebra$
 4/0 Mathlib/RingTheory/Finiteness.lean 1 4 ['alreadydone', 'erdOne', 'leanprover-bot'] nobody
554-39202
1 year ago
853-39645
853 days ago
21-27905
21 days
12133 ADedecker
author:ADedecker
 feat: generalize instIsLowerProd to arbitrary products Also change a bit the proof of the product case to match my own taste, feel free to tell if you prefer the old one. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict awaiting-author t-topology t-order 34/14 Mathlib/Topology/Constructions.lean,Mathlib/Topology/Order/LowerUpperTopology.lean 2 13 ['Ruben-VandeVelde', 'TwoFX', 'github-actions', 'jcommelin', 'mans0954', 'mathlib-bors', 'riccardobrasca'] nobody
553-48956
1 year ago
704-44592
704 days ago
63-69226
63 days
16637 FR-vdash-bot
author:FR-vdash-bot
 perf: reorder `extends` of `(Add)Monoid` --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict WIP t-algebra
label:t-algebra$
 46/51 Mathlib/Algebra/Algebra/Hom.lean,Mathlib/Algebra/BigOperators/Ring/List.lean,Mathlib/Algebra/GCDMonoid/Basic.lean,Mathlib/Algebra/Group/Defs.lean,Mathlib/Algebra/Group/Ext.lean,Mathlib/Algebra/Group/Opposite.lean,Mathlib/Algebra/Group/Prod.lean,Mathlib/Algebra/Order/Group/Unbundled/Abs.lean,Mathlib/Algebra/Polynomial/Roots.lean,Mathlib/Algebra/Ring/SumsOfSquares.lean,Mathlib/CategoryTheory/Preadditive/FunctorCategory.lean,Mathlib/Data/Finset/NoncommProd.lean,Mathlib/GroupTheory/Congruence/Defs.lean,Mathlib/GroupTheory/Torsion.lean,Mathlib/LinearAlgebra/LinearPMap.lean,Mathlib/LinearAlgebra/TensorProduct/Basic.lean,Mathlib/Order/Filter/Germ/Basic.lean,Mathlib/RingTheory/Bialgebra/Hom.lean,Mathlib/RingTheory/Coalgebra/Hom.lean,Mathlib/RingTheory/TensorProduct/MvPolynomial.lean 20 3 ['astrainfinita', 'github-actions', 'leanprover-bot'] nobody
553-48194
1 year ago
618-55550
618 days ago
1-49655
1 day
8661 joelriou
author:joelriou
 feat(CategoryTheory/Sites): descent of sheaves In this PR, it is shown that the category of sheaves on a site `(C, J)` identifies as a full subcategory of a category of families of sheaves equipped with a descent data (for a family of objects which cover the final object). Under suitable conditions, it shall be shown that this is an equivalence of categories (TODO). --- This shall be split in small PRs later. - [x] depends on: #8622 - [x] depends on: #8632 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict WIP t-category-theory 1396/26 Mathlib.lean,Mathlib/CategoryTheory/Over.lean,Mathlib/CategoryTheory/Sites/CoverPreserving.lean,Mathlib/CategoryTheory/Sites/Descent.lean,Mathlib/CategoryTheory/Sites/EqualizerSheafCondition.lean,Mathlib/CategoryTheory/Sites/InducedTopology.lean,Mathlib/CategoryTheory/Sites/ObjectsCoverTop.lean,Mathlib/CategoryTheory/Sites/Over.lean,Mathlib/CategoryTheory/Sites/SheafHom.lean,Mathlib/CategoryTheory/Sites/Sieves.lean 10 3 ['github-actions', 'leanprover-community-mathlib4-bot'] nobody
550-25176
1 year ago
unknown
0-0
0 seconds
10476 shuxuezhuyi
author:shuxuezhuyi
 feat(Topology/UniformSpace): define uniform preordered space We define the semi-uniform structure and the uniform preordered space. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict awaiting-author t-topology 94/0 Mathlib.lean,Mathlib/Topology/UniformSpace/UniformOrder.lean,docs/references.bib 3 2 ['shuxuezhuyi'] nobody
549-11830
1 year ago
777-39258
777 days ago
52-19273
52 days
17593 astrainfinita
author:astrainfinita
 chore(Algebra/Order/GroupWithZero/Unbundled): deprecate useless lemmas, use `ZeroLEOneClass` There are still some useless lemmas that were simply ported from `Algebra.Order.Monoid.Lemmas`, such as just chain an existing lemma with an assumption and lemmas whose assumptions imply `1 ≤ 0`. This PR removes them. Also, some lemmas have both assumptions like `1 < a` `0 < a`. This PR uses `ZeroLEOneClass` to remove redundant assumptions. --- - [ ] depends on: #17623 Ported from https://github.com/leanprover-community/mathlib/pull/16525 and https://github.com/leanprover-community/mathlib/pull/18158 Adapted from #9250. This version is easier to review. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-algebra blocked-by-other-PR t-order
label:t-algebra$
 188/48 Archive/Wiedijk100Theorems/BuffonsNeedle.lean,Mathlib/Algebra/Order/GroupWithZero/Canonical.lean,Mathlib/Algebra/Order/GroupWithZero/Unbundled.lean,Mathlib/Combinatorics/SimpleGraph/Triangle/Counting.lean,Mathlib/RingTheory/DedekindDomain/FiniteAdeleRing.lean,Mathlib/Topology/Algebra/Order/Field.lean 6 4 ['astrainfinita', 'github-actions', 'mathlib4-dependent-issues-bot', 'vihdzp'] nobody
548-35172
1 year ago
589-20753
589 days ago
0-74903
20 hours
17623 FR-vdash-bot
author:FR-vdash-bot
 feat(Algebra/Order/GroupWithZero/Unbundled): add some lemmas Some lemmas in `Algebra.Order.GroupWithZero.Unbundled` have incorrect or unsatisfactory names, or assumptions that can be omitted using `ZeroLEOneClass`. The lemmas added in this PR are versions of existing lemmas that use the correct or better name or `ZeroLEOneClass` to omit an assumption. The original lemmas will be deprecated in #17593. | New name | Old name | |-------------------------|-------------------------| | `mul_le_one_left₀` | `Left.mul_le_one_of_le_of_le` | | `mul_lt_one_of_le_of_lt_left₀` (`0 ≤ ·` version) / `mul_lt_one_of_le_of_lt_of_pos_left` | `Left.mul_lt_of_le_of_lt_one_of_pos` | | `mul_lt_one_of_lt_of_le_left₀` | `Left.mul_lt_of_lt_of_le_one_of_nonneg` | | `mul_le_one_right₀` | `Right.mul_le_one_of_le_of_le` | | `mul_lt_one_of_lt_of_le_right₀` (`0 ≤ ·` version) / `mul_lt_one_of_lt_of_le_of_pos_right` | `Right.mul_lt_one_of_lt_of_le_of_pos` | | `mul_lt_one_of_le_of_lt_right₀` | `Right.mul_lt_one_of_le_of_lt_of_nonneg` | The following lemmas use `ZeroLEOneClass`. | New name | Old name | |-------------------------|-------------------------| | `(Left.)one_le_mul₀` | `Left.one_le_mul_of_le_of_le` | | `Left.one_lt_mul_of_le_of_lt₀` | `Left.one_lt_mul_of_le_of_lt_of_pos` | | `Left.one_lt_mul_of_lt_of_le₀` | `Left.lt_mul_of_lt_of_one_le_of_nonneg` / `one_lt_mul_of_lt_of_le` (still there) | | `(Left.)one_lt_mul₀` | | | `Right.one_le_mul₀` | `Right.one_le_mul_of_le_of_le` | | `Right.one_lt_mul_of_lt_of_le₀` | `Right.one_lt_mul_of_lt_of_le_of_pos` | | `Right.one_lt_mul_of_le_of_lt₀` | `Right.one_lt_mul_of_le_of_lt_of_nonneg` / `one_lt_mul_of_le_of_lt` (still there) / `one_lt_mul` (still there) | | `Right.one_lt_mul₀` | `Right.one_lt_mul_of_lt_of_lt` | --- Split from #17593. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-algebra awaiting-zulip t-order
label:t-algebra$
 146/44 Mathlib/Algebra/Order/GroupWithZero/Canonical.lean,Mathlib/Algebra/Order/GroupWithZero/Unbundled.lean 2 11 ['YaelDillies', 'astrainfinita', 'github-actions', 'j-loreaux'] nobody
548-35172
1 year ago
555-27731
555 days ago
33-64877
33 days
17624 FR-vdash-bot
author:FR-vdash-bot
 feat(Algebra/Order/GroupWithZero/Unbundled): generalize lemmas --- - [ ] depends on: #17623 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-algebra blocked-by-other-PR t-order
label:t-algebra$
 121/26 Mathlib/Algebra/Order/GroupWithZero/Unbundled.lean 1 2 ['github-actions', 'mathlib4-dependent-issues-bot'] nobody
544-72344
1 year ago
589-19623
589 days ago
0-465
7 minutes
17513 FR-vdash-bot
author:FR-vdash-bot
 perf: do not search algebraic hierarchies when using `map_*` lemmas --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict WIP t-algebra awaiting-bench
label:t-algebra$
 5/3 Mathlib/Algebra/Group/Hom/Defs.lean,Mathlib/GroupTheory/GroupAction/Hom.lean 2 10 ['astrainfinita', 'github-actions', 'grunweg', 'leanprover-bot'] nobody
543-31366
1 year ago
587-33231
587 days ago
4-72589
4 days
17515 FR-vdash-bot
author:FR-vdash-bot
 perf: do not need `simp low` now --- - [ ] depends on: #17513 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-algebra blocked-by-other-PR
label:t-algebra$
 12/10 Mathlib/Algebra/Group/Hom/Defs.lean,Mathlib/Analysis/SpecialFunctions/Bernstein.lean,Mathlib/GroupTheory/GroupAction/Hom.lean,Mathlib/NumberTheory/LucasLehmer.lean 4 2 ['github-actions', 'mathlib4-dependent-issues-bot'] nobody
543-31365
1 year ago
592-18877
592 days ago
0-380
6 minutes
19212 Julian
author:Julian
 feat(LinearAlgebra): add a variable_alias for VectorSpace Taken directly from the variable_alias docs. Zulip: https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/why.20.5Bvariable_alias.5D.20attribute.20is.20not.20used.20in.20Mathlib.3F --- This is the first actual variable alias added to mathlib. I haven't reviewed variable_alias fully, but it seems like there's at least 3 ways they could be distributed in Mathlib: * alongside whatever subfolder they "belong to" (which is what I've tentatively done here) * In a file called `Aliases` somewhere near the thing they alias (which seems less discoverable to me) * In a single file, a la `Mathlib.TrainingWheels` (with some less playful name) which is meant to define a bunch of more "friendly" aliases all in one place. I kind of like the idea of the third thing as a future module but perhaps it can be synthesized if/when there are more aliases? For now as I say I've done the first one, but please let me know if someone prefers something else. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-algebra
label:t-algebra$
 25/0 Mathlib.lean,Mathlib/LinearAlgebra/VectorSpace.lean,scripts/noshake.json 3 10 ['Julian', 'PieterCuijpers', 'github-actions', 'urkud'] nobody
542-36611
1 year ago
542-36611
542 days ago
7-68089
7 days
19337 zeramorphic
author:zeramorphic
 feat(Data/Finsupp): generalise `Finsupp` to any "zero" value Remove the explicit dependence of `Finsupp` on `[Zero M]`, instead defining `Finsupp'` (better name pending) to be functions that are equal to a fixed value `z : M` cofinitely often. This PR is intended to do the initial work of replacing the definition of `Finsupp` with an instantiation of the more general definition, without adding any appropriate API. If accepted, the API development will follow in later PRs. Issues to consider: - Naming of `Finsupp'.` - Where should `Finsupp'` lemmas go? Do they need their own file/folder under `Data/`? Relevant Zulip threads: - https://leanprover.zulipchat.com/#narrow/channel/217875-Is-there-code-for-X.3F/topic/Finsupp.20generalisations - https://leanprover.zulipchat.com/#narrow/channel/217875-Is-there-code-for-X.3F/topic/Finsupp-like.20partial.20function Comments are welcome. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-data 203/83 Archive/Wiedijk100Theorems/Partition.lean,Mathlib/Algebra/MvPolynomial/Basic.lean,Mathlib/Algebra/MvPolynomial/Rename.lean,Mathlib/Algebra/MvPolynomial/Variables.lean,Mathlib/Algebra/Polynomial/Basic.lean,Mathlib/Algebra/Polynomial/Laurent.lean,Mathlib/Data/Finsupp/BigOperators.lean,Mathlib/Data/Finsupp/Defs.lean,Mathlib/Data/Finsupp/Order.lean,Mathlib/Data/Nat/Choose/Multinomial.lean,Mathlib/RingTheory/MvPolynomial/Symmetric/Defs.lean,Mathlib/RingTheory/PowerBasis.lean,scripts/nolints_prime_decls.txt 13 5 ['github-actions', 'vihdzp', 'zeramorphic'] nobody
540-12688
1 year ago
540-12688
540 days ago
4-60621
4 days
18756 astrainfinita
author:astrainfinita
 refactor: deprecate `DistribMulActionSemiHomClass` `MulSemiringActionSemiHomClass` --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-algebra
label:t-algebra$
 50/28 Mathlib/Algebra/Algebra/NonUnitalHom.lean,Mathlib/Algebra/Module/LinearMap/Defs.lean,Mathlib/GroupTheory/GroupAction/Hom.lean 3 4 ['astrainfinita', 'github-actions', 'leanprover-bot'] nobody
528-64757
1 year ago
528-64757
528 days ago
31-53021
31 days
19125 yhtq
author:yhtq
 feat: add theorems to transfer `IsGalois` between pairs of fraction rings feat: add theorems to transfer `IsGalois` between pairs of fraction rings. - [x] depends on: #18404 - [x] depends on: #19124 --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-algebra new-contributor
label:t-algebra$
 121/0 Mathlib.lean,Mathlib/FieldTheory/Galois/IsFractionRing.lean,Mathlib/RingTheory/Localization/FractionRing.lean 3 3 ['github-actions', 'mathlib4-dependent-issues-bot', 'tb65536'] nobody
525-77226
1 year ago
552-38608
552 days ago
0-1980
33 minutes
18841 hrmacbeth
author:hrmacbeth
 chore: change some `linarith`s to `linear_combination`s Change 100 `linarith`s to `linear_combination`s; this is generally a slight speedup. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) - [x] depends on: #18714 (not strictly blocked by this, but the speed comparison will be more informative after it) merge-conflict WIP 106/107 Archive/Imo/Imo1959Q2.lean,Archive/Imo/Imo1988Q6.lean,Archive/Imo/Imo2005Q3.lean,Archive/Imo/Imo2008Q2.lean,Archive/Imo/Imo2008Q3.lean,Archive/Imo/Imo2013Q5.lean,Archive/Imo/Imo2021Q1.lean,Mathlib/Analysis/Analytic/Basic.lean,Mathlib/Analysis/Analytic/Inverse.lean,Mathlib/Analysis/Calculus/BumpFunction/FiniteDimension.lean,Mathlib/Analysis/Complex/AbelLimit.lean,Mathlib/Analysis/Convex/Gauge.lean,Mathlib/Analysis/Convex/Slope.lean,Mathlib/Analysis/Convex/SpecificFunctions/Basic.lean,Mathlib/Analysis/Convex/Uniform.lean,Mathlib/Analysis/Convex/Visible.lean,Mathlib/Analysis/FunctionalSpaces/SobolevInequality.lean,Mathlib/Analysis/Normed/Module/FiniteDimension.lean,Mathlib/Analysis/PSeries.lean,Mathlib/Analysis/SpecialFunctions/Gamma/BohrMollerup.lean,Mathlib/Analysis/SpecialFunctions/Log/Basic.lean,Mathlib/Analysis/SpecialFunctions/Log/Monotone.lean,Mathlib/Analysis/SpecialFunctions/Pow/Deriv.lean,Mathlib/Analysis/SpecialFunctions/Pow/Real.lean,Mathlib/Analysis/SpecificLimits/FloorPow.lean,Mathlib/MeasureTheory/Covering/BesicovitchVectorSpace.lean,Mathlib/MeasureTheory/Measure/Lebesgue/VolumeOfBalls.lean,Mathlib/NumberTheory/Modular.lean,Mathlib/NumberTheory/Transcendental/Liouville/LiouvilleWith.lean,Mathlib/Probability/Distributions/Pareto.lean 30 29 ['github-actions', 'grunweg', 'hrmacbeth', 'jcommelin', 'leanprover-bot', 'mathlib4-dependent-issues-bot'] nobody
524-38152
1 year ago
546-60398
546 days ago
3-28253
3 days
11142 hmonroe
author:hmonroe
 feat(ProofTheory): Define logical symbols abstractly; opens new top-level section, drawing from lean4-logic --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict awaiting-author t-logic 468/1 Mathlib.lean,Mathlib/Data/Fin/VecNotation.lean,Mathlib/ProofTheory/LogicSymbol.lean 3 19 ['PatrickMassot', 'YaelDillies', 'avigad', 'fpvandoorn', 'github-actions'] nobody
518-47972
1 year ago
715-21621
715 days ago
94-3235
94 days
11210 hmonroe
author:hmonroe
 Test commit --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict WIP 1950/1 Mathlib.lean,Mathlib/Data/Fin/VecNotation.lean,Mathlib/ProofTheory/Calculus.lean,Mathlib/ProofTheory/FirstOrder/Arith/Language.lean,Mathlib/ProofTheory/FirstOrder/Basic/Syntax/Term.lean,Mathlib/ProofTheory/LogicSymbol.lean,Mathlib/ProofTheory/Matrix.lean,Mathlib/ProofTheory/Semantics.lean,Mathlib/ProofTheory/System.lean,docs/references.bib 10 100 ['github-actions'] nobody
518-47971
1 year ago
804-37452
804 days ago
2-67901
2 days
19621 Command-Master
author:Command-Master
 feat: Multiplicity and prime-adic valuation of derivations --- - [ ] depends on: #19596 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-algebra blocked-by-other-PR large-import
label:t-algebra$
 397/13 Mathlib.lean,Mathlib/Algebra/Order/AddGroupWithTop.lean,Mathlib/Algebra/Order/Monoid/Unbundled/WithTop.lean,Mathlib/Data/ENat/Basic.lean,Mathlib/Order/WithBot.lean,Mathlib/RingTheory/Derivation/Multiplicity.lean,Mathlib/RingTheory/DiscreteValuationRing/Basic.lean,Mathlib/RingTheory/Valuation/Basic.lean,Mathlib/RingTheory/Valuation/PrimeMultiplicity.lean 9 2 ['github-actions', 'mathlib4-dependent-issues-bot'] nobody
518-30232
1 year ago
538-55581
538 days ago
0-666
11 minutes
18262 joelriou
author:joelriou
 feat(Algebra/Category/ModuleCat/Presheaf): exterior powers of presheaves of modules --- - [x] depends on: #18261 - [ ] depends on: #18236 - [ ] depends on: #18197 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) WIP t-algebra blocked-by-other-PR t-category-theory merge-conflict
label:t-algebra$
 874/0 Mathlib.lean,Mathlib/Algebra/Category/ModuleCat/ChangeOfRings.lean,Mathlib/Algebra/Category/ModuleCat/ExteriorPower.lean,Mathlib/Algebra/Category/ModuleCat/Presheaf/ExteriorPower.lean,Mathlib/Algebra/Category/ModuleCat/Presheaf/FunctorOfNatTrans.lean,Mathlib/Algebra/Category/ModuleCat/Pseudofunctor.lean 6 2 ['github-actions', 'mathlib4-dependent-issues-bot'] nobody
518-21527
1 year ago
unknown
0-0
0 seconds
15269 kkytola
author:kkytola
 feat: Add ENNReal.floor A right-continuous floor function on `ENNReal`. --- - [x] depends on: #13938 - [ ] depends on: #15773 (general type class for `ENat`-valued floor functions) - [x] depends on: #15380 (topology on `ENat` is needed to state right continuity of the floor function) [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra blocked-by-other-PR t-order merge-conflict awaiting-author
label:t-algebra$
 445/0 Mathlib.lean,Mathlib/Algebra/Order/EFloor.lean,Mathlib/Data/ENNReal/Floor.lean,Mathlib/Data/Nat/Lattice.lean 4 18 ['YaelDillies', 'github-actions', 'kkytola', 'leanprover-community-mathlib4-bot', 'urkud'] nobody
505-2461
1 year ago
653-83927
653 days ago
0-3440
57 minutes
15773 kkytola
author:kkytola
 feat: Add type class for ENat-valued floor functions This PR adds a type class for extended natural number -valued floor functions. This is split off from #15269, where the suggestions were to make the floor function on ENNReal ENat-valued and to have an API mimicling FloorSemirings. Besides ENNReal, at least ENNRat would naturally satisfy the general type class. --- Two things are worth noting: * To fully mimic `FloorSemiring` API, also ceiling functions need to be added. The plan is to do that in a later PR. * The PR introduces the class `CastNatENatClass` to ensure that `natCast` and a coercion from `ENat` behave in the natural and order-respecing manner. This feels a little ad hoc, but such assumptions are needed for general `ENat`-valued floor functions to behave well. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict awaiting-author t-order 231/0 Mathlib.lean,Mathlib/Algebra/Order/EFloor.lean,Mathlib/Data/ENat/Basic.lean 3 5 ['YaelDillies', 'github-actions', 'kkytola', 'urkud'] nobody
505-2338
1 year ago
581-1691
581 days ago
66-24436
66 days
3251 kmill
author:kmill
 feat: deriving `LinearOrder` for simple enough inductive types Uses the same machinery underlying the `Fintype` derive handler to derive a lexicographical `LinearOrder` for non-recursive inductive types that have no indices. In principle more complicated types can have `LinearOrder`s, but that would require a more sophisticated implementation. --- - [x] depends on: #3198 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict WIP awaiting-author t-meta 82/0 Mathlib.lean,Mathlib/Tactic/DeriveLinearOrder.lean 2 5 ['ChrisHughes24', 'kim-em', 'kmill', 'vihdzp'] nobody
502-63391
1 year ago
1128-65422
1128 days ago
1-80343
1 day
16120 awainverse
author:awainverse
 feat(ModelTheory/Algebra/Ring/Basic): Ring homomorphisms are a `StrongHomClass` for the language of rings Adds an `IsAlgebraic` instance to the language of rings Adds a `StrongHomClass` instance to the type of ring homomorphisms between rings with `CompatibleRing` structures --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-algebra RFC t-logic
label:t-algebra$
 34/13 Mathlib/ModelTheory/Algebra/Ring/Basic.lean 1 10 ['ChrisHughes24', 'YaelDillies', 'awainverse', 'github-actions', 'jcommelin'] nobody
500-80931
1 year ago
500-80931
500 days ago
135-29017
135 days
20459 Ruben-VandeVelde
author:Ruben-VandeVelde
 chore: fix names of roots_C_mul_X_{add,sub}_C_of_IsUnit --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) awaiting-author t-algebra
label:t-algebra$
 11/5 Mathlib/Algebra/Polynomial/FieldDivision.lean,Mathlib/Algebra/Polynomial/Roots.lean 2 2 ['eric-wieser', 'github-actions'] nobody
499-18974
1 year ago
499-18974
499 days ago
4-64422
4 days
20527 trivial1711
author:trivial1711
 refactor(Topology/UniformSpace/Completion): more descriptive names for `α → Completion α` - We rename the various maps `α → Completion α` in order to make their names more consistent. - Let `α` be a uniform space. We rename the uniformly continuous function `α → Completion α` from `UniformSpace.Completion.coe'` to `UniformSpace.Completion.coe`. - Let `α` be a uniform additive group. We rename the additive group homomorphism `α →+ Completion α` from `UniformSpace.Completion.toCompl` to `UniformSpace.Completion.coeAddHom`. - Let `α` be a uniform ring. The ring homomorphism `α →+* Completion α` is called `UniformSpace.Completion.coeRingHom`; its name is unchanged. - Let `α` be a normed space over a field `𝕜`. We rename the linear isometry `α →ₗᵢ[𝕜] Completion α` from `UniformSpace.Completion.toComplₗᵢ` to `UniformSpace.Completion.coeₗᵢ`. - Let `α` be a normed space over a field `𝕜`. We rename the continuous linear map `α →L[𝕜] Completion α` from `UniformSpace.Completion.toComplL` to `UniformSpace.Completion.coeL`. - Let `α` be a normed additive group. We rename the norm preserving homomorphism `NormedAddGroupHom α (Completion α)` from `NormedAddCommGroup.toCompl` to `UniformSpace.Completion.coeNormedAddGroupHom`. - We analogously rename some other theorems. - We add some trivial theorems (all of which are proved by `rfl`) that state that the functions considered above are equal. We give all of them the `simp` and `norm_cast` attributes. - We add a new theorem `UniformSpace.Completion.coeAddHom_eq_coe` that states that `UniformSpace.Completion.coeAddHom` and `UniformSpace.Completion.coe` are equal as functions. - We similarly add a new theorem `UniformSpace.Completion.coeRingHom_eq_coe`. - We rename the theorem `UniformSpace.Completion.coe_toComplₗᵢ` to `UniformSpace.Completion.coeₗᵢ_eq_coe`. - We rename the theorem `UniformSpace.Completion.coe_toComplL` to `UniformSpace.Completion.coeL_eq_coe`. - We similarly add a new theorem `UniformSpace.Completion.coeNormedAddGroupHom_eq_coe`. - We change all occurrences of the string `((↑) : α → Completion α)` to `(coe : α → Completion α)` or just `coe`. - We put the statements of some theorems into simp normal form by using the plain function `coe` rather than the homomorphisms that carry more structure. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-topology 130/92 Mathlib/Analysis/Analytic/Uniqueness.lean,Mathlib/Analysis/Calculus/FDeriv/Analytic.lean,Mathlib/Analysis/Complex/AbsMax.lean,Mathlib/Analysis/Complex/Liouville.lean,Mathlib/Analysis/InnerProductSpace/Completion.lean,Mathlib/Analysis/Normed/Group/HomCompletion.lean,Mathlib/Analysis/Normed/Module/Completion.lean,Mathlib/Analysis/SpecialFunctions/NonIntegrable.lean,Mathlib/MeasureTheory/Integral/IntegralEqImproper.lean,Mathlib/Topology/Algebra/GroupCompletion.lean,Mathlib/Topology/Algebra/InfiniteSum/GroupCompletion.lean,Mathlib/Topology/Algebra/InfiniteSum/Nonarchimedean.lean,Mathlib/Topology/Algebra/Nonarchimedean/Completion.lean,Mathlib/Topology/Algebra/UniformRing.lean,Mathlib/Topology/Category/UniformSpace.lean,Mathlib/Topology/MetricSpace/Completion.lean,Mathlib/Topology/UniformSpace/Completion.lean 17 4 ['eric-wieser', 'github-actions', 'trivial1711'] nobody
494-25563
1 year ago
494-25563
494 days ago
6-66637
6 days
17739 Aaron1011
author:Aaron1011
 feat(Topology/Order/DenselyOrdered): prove Not (IsOpen) for intervals Prove that Iic/Ici/Ioc/Ico/Icc intervals are not open in densely ordered topologies with no min/max element --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict awaiting-author t-topology new-contributor 27/0 Mathlib/Topology/Order/DenselyOrdered.lean 1 8 ['github-actions', 'vihdzp'] nobody
492-12838
1 year ago
585-4408
585 days ago
0-4704
1 hour
18474 FR-vdash-bot
author:FR-vdash-bot
 perf: lower the priority of `*WithOne.to*` instances --- From #7873. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict slow-typeclass-synthesis t-algebra t-data
label:t-algebra$
 9/2 Mathlib/Algebra/Polynomial/BigOperators.lean,Mathlib/Data/Int/Cast/Defs.lean,Mathlib/Data/Nat/Cast/Defs.lean 3 7 ['astrainfinita', 'eric-wieser', 'github-actions', 'leanprover-bot'] nobody
492-12593
1 year ago
492-12593
492 days ago
76-66907
76 days
20656 Komyyy
author:Komyyy
 feat(Mathlib/Geometry/Manifold/VectorBundle/Sphere): convert orthogonal smooth `M → 𝕊ⁿ` & `M → ℝⁿ⁺¹` to smooth `M → T𝕊ⁿ` Current Mathlib has no easy way to define function from a manifold to tangent bundles of sphere: `T𝕊ⁿ`. This PR gives this: `sphereTangentMap`. This convert orthogonal smooth `M → 𝕊ⁿ` & `M → ℝⁿ⁺¹` to smooth `M → T𝕊ⁿ`. I also proved that if `f : M → 𝕊ⁿ` & `g : M → ℝⁿ⁺¹` are smooth then `sphereTangentMap` of `f` & `g` is smooth too. --- ⚠ **CAUTION** I formalized this in my spare time. I don't have the energy to maintain the PR, but I create this PR so this may helps everyone. The only one thing to do is proof cleanup. TODO: - [x] `contDiff_uncurry_stereoInvFunAux` & `coe_sphere_comp_stereoInvFun` may have to be moved to `Mathlib.Geometry.Manifold.Instances.Sphere`. - [ ] Proof cleanup. Current proof may be redundant and ugly. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) please-adopt merge-conflict t-differential-geometry 246/6 Mathlib.lean,Mathlib/Geometry/Manifold/Instances/Sphere.lean,Mathlib/Geometry/Manifold/VectorBundle/Sphere.lean 3 1 ['github-actions'] nobody
491-47527
1 year ago
unknown
0-0
0 seconds
15711 znssong
author:znssong
 feat(Combinatorics/SimpleGraph): Some lemmas about walk, cycle and Hamiltonian cycle --- These lemmas are separated from the `meow-sister/BondyChvatal` branch and will be needed for the proof of the Bondy-Chvátal theorem. - [x] depends on: #15536 - [x] depends on: #16294 merge-conflict awaiting-author t-combinatorics new-contributor 407/3 Mathlib/Combinatorics/SimpleGraph/Finite.lean,Mathlib/Combinatorics/SimpleGraph/Hamiltonian.lean,Mathlib/Combinatorics/SimpleGraph/Path.lean,Mathlib/Combinatorics/SimpleGraph/Walk.lean 4 22 ['Rida-Hamadani', 'YaelDillies', 'github-actions', 'mathlib4-dependent-issues-bot', 'znssong'] nobody
491-31924
1 year ago
612-43085
612 days ago
9-13962
9 days
15720 znssong
author:znssong
 feat(SimpleGraph): The Bondy-Chvátal theorem The proof of the Bondy-Chvátal theorem, with Dirac's theorem and Ore's theorem as its corollary. - [x] depends on: #15536 - [ ] depends on: #15711 - [ ] depends on: #15578 merge-conflict blocked-by-other-PR t-combinatorics new-contributor 903/3 Mathlib.lean,Mathlib/Combinatorics/SimpleGraph/BondyChvatal.lean,Mathlib/Combinatorics/SimpleGraph/Finite.lean,Mathlib/Combinatorics/SimpleGraph/Hamiltonian.lean,Mathlib/Combinatorics/SimpleGraph/Path.lean,Mathlib/Combinatorics/SimpleGraph/Walk.lean,Mathlib/Dynamics/FixedPoints/Basic.lean,Mathlib/Dynamics/FixedPoints/Increasing.lean 8 3 ['github-actions', 'grunweg'] nobody
491-31924
1 year ago
648-49278
648 days ago
0-1791
29 minutes
18629 tomaz1502
author:tomaz1502
 feat(Computability.Timed): Formalization of runtime complexity of List.merge This PR adds the formalization of the runtime complexity of the merge function, defined in `Data/List/Sort`. Requires: https://github.com/leanprover-community/mathlib4/pull/15450 References: - Previous PR on mathlib3: https://github.com/leanprover-community/mathlib3/pull/14494/ - First discussion on Zulip: https://leanprover.zulipchat.com/#narrow/stream/113488-general/topic/BSc.20Final.20Project/near/220647062 - Second disussion on Zulip: https://leanprover.zulipchat.com/#narrow/stream/113488-general/topic/Formalization.20of.20Runtime.20Complexity.20of.20Sorting.20Algorithms/near/284184450 --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-computability awaiting-author new-contributor 186/0 Mathlib.lean,Mathlib/Computability/Timed/InsertionSort.lean,Mathlib/Computability/Timed/Merge.lean 3 2 ['github-actions', 'trivial1711'] nobody
490-84243
1 year ago
530-83856
530 days ago
33-11262
33 days
8362 urkud
author:urkud
 feat(Asymptotics): define `ReflectsGrowth` --- - [x] depends on: #8349 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict awaiting-author t-analysis 268/0 Mathlib.lean,Mathlib/Analysis/Asymptotics/ReflectsGrowth.lean 2 14 ['YaelDillies', 'fpvandoorn', 'github-actions', 'leanprover-community-mathlib4-bot', 'urkud'] nobody
489-5097
1 year ago
680-56924
680 days ago
240-47513
240 days
6692 prakol16
author:prakol16
 feat: disjoint indexed union of local homeomorphisms Add disjoint indexed union of local equivs and local homeomorphisms --- This is leading up to PRing some things related to covering spaces that I wrote a long time ago in lean 3 but never submitted a PR for. Note that this was converted using mathport. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict awaiting-author t-topology 126/0 Mathlib/Logic/Equiv/PartialEquiv.lean,Mathlib/Topology/PartialHomeomorph.lean 2 4 ['alreadydone', 'github-actions', 'winstonyin'] nobody
488-76093
1 year ago
580-86112
580 days ago
118-5497
118 days
18461 hannahfechtner
author:hannahfechtner
 feat: left and right common multiples mixins add mixins for left and right common multiples. These carry the data of what factors are used to create the common multiples --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) awaiting-author t-algebra new-contributor
label:t-algebra$
 78/0 Mathlib/Algebra/Group/Defs.lean 1 13 ['github-actions', 'hannahfechtner', 'jcommelin', 'kbuzzard', 'kim-em', 'trivial1711'] nobody
487-45423
1 year ago
487-45423
487 days ago
69-35596
69 days
19291 PieterCuijpers
author:PieterCuijpers
 feat(Algebra/Order/Hom): add quantale homomorphism Definition of quantale homomorphisms as functions that are both semigroup homomorphisms and complete lattice homomorphisms. --- - [x] depends on: #19810 - [x] depends on: #19811 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict awaiting-author t-algebra new-contributor
label:t-algebra$
 209/0 Mathlib.lean,Mathlib/Algebra/Order/Hom/Quantale.lean,scripts/noshake.json 3 29 ['PieterCuijpers', 'YaelDillies', 'github-actions', 'kim-em', 'mathlib4-dependent-issues-bot'] nobody
486-19502
1 year ago
491-73303
491 days ago
29-51482
29 days
19352 hrmacbeth
author:hrmacbeth
 chore: change some `nlinarith`s to `linear_combination`s --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict WIP 13/13 Archive/Imo/Imo2021Q1.lean,Archive/Wiedijk100Theorems/AreaOfACircle.lean,Mathlib/Analysis/Normed/Group/AddCircle.lean,Mathlib/Analysis/Normed/Group/Basic.lean,Mathlib/Analysis/Normed/Ring/Units.lean,Mathlib/Analysis/SpecialFunctions/Complex/LogBounds.lean,Mathlib/Combinatorics/SimpleGraph/Regularity/Increment.lean,Mathlib/NumberTheory/Modular.lean 8 4 ['github-actions', 'hrmacbeth', 'leanprover-bot'] nobody
484-48713
1 year ago
546-60418
546 days ago
0-8636
2 hours
20372 jvlmdr
author:jvlmdr
 feat(MeasureTheory/Function): Add ContinuousLinearMap.bilinearCompLp(L) Introduce ContinuousLinearMap.bilinearCompLp and bilinearCompLpL. Generalize eLpNorm_le_eLpNorm_mul_eLpNorm theorems to include constant C in bound condition. --- Expect this may be useful for defining tempered distributions from functions in `L^p`. The definitions more or less follow `ContinuousLinearMap.compLp...`. Names are loosely analogous to `ContinuousLinearMap.bilinearComp` and `SchwartzMap.bilinLeftCLM`. Note: I preferred the spelling `hpqr : p⁻¹ + q⁻¹ = r⁻¹` with `f` in `L^p` and `g` in `L^q` to `hpqr : 1 / p = 1 / q + 1 / r`. It's easier to obtain from `ENNReal.IsConjExponent` too. A few questions: - [ ] I defined `bilinear{Left,Right}LpL` in addition to `bilinearCompLpL` because `LinearMap.mkContinuous₂` is marked as `noncomputable` and `LinearMap.mkContinuous` is not. Is this worth the extra definitions? (Note: This is not visible in the source due to `noncomputable section`.) - [ ] Should I use `C : ℝ` instead of `C : NNReal` for `eLpNorm_le_eLpNorm_mul_eLpNorm'_of_norm'`? - [ ] Is it going to be painful to have `[Fact (1 ≤ p)] [Fact (1 ≤ q)] [Fact (1 ≤ r)]`? I don't think there's a way to avoid it though. Maybe providing specialized versions for `p.IsConjExponent q` with `L^1`? Naming: - [ ] Is it satisfactory to add a `'` to the `eLpNorm_le_eLpNorm_mul_eLpNorm ` definitions in `CompareExp.lean` where `≤ ‖f x‖ * ‖g x‖` has been replaced with `≤ C * ‖f x‖ * ‖g x‖`? These could replace the existing theorems, although I don't want to break backwards compatibility. There are 5 instances: `eLpNorm_le_eLpNorm_top_mul_eLpNorm'`, `eLpNorm_le_eLpNorm_mul_eLpNorm_top'`, `eLpNorm'_le_eLpNorm'_mul_eLpNorm''`, `eLpNorm_le_eLpNorm_mul_eLpNorm_of_nnnorm'`, `eLpNorm_le_eLpNorm_mul_eLpNorm'_of_norm'` (I'm not sure why the existing theorem `eLpNorm_le_eLpNorm_mul_eLpNorm'_of_norm` has an internal `'`) - [ ] Is `bilinearLeftLpL` a suitable name? Other options: `bilinearCompLpLeftL`, `bilinearCompLeftLpL`, `bilinLeftLpL` (analogous to `SchwartzMap.bilinLeftCLM`) [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-measure-probability new-contributor 203/40 Mathlib/MeasureTheory/Function/LpSeminorm/CompareExp.lean,Mathlib/MeasureTheory/Function/LpSpace.lean 2 1 ['github-actions'] nobody
479-36850
1 year ago
479-36850
479 days ago
27-43617
27 days
2605 eric-wieser
author:eric-wieser
 chore: better error message in linarith On this mwe: ```lean import Mathlib.Tactic.Linarith example (s : Set ℕ) (h : s = s) : 0 ≤ 1 := by linarith ``` this now indicates where the internal error is coming from. Is there a better way of chaining errors than this? --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict awaiting-author t-meta 12/1 Mathlib/Tactic/Linarith/Preprocessing.lean 1 3 ['Vierkantor', 'harahu', 'kim-em', 'mo271'] nobody
477-27443
1 year ago
1124-58982
1124 days ago
51-42225
51 days
11837 trivial1711
author:trivial1711
 feat: completion of a uniform multiplicative group Multiplicativize `Topology.Algebra.GroupCompletion`. That is, rewrite it in the multiplicative setting and recover the original results using `@[to_additive]`. - Because `@[to_additive]` doesn't work with `noncomputable section` (https://github.com/leanprover/lean4/pull/2610), some instances with `@[to_additive]` need to be explicitly marked with `noncomputable instance`. - One might be tempted to multiplicativize this definition from `Topology.Algebra.GroupCompletion`: ```lean instance [UniformSpace α] [Add α] : Add (Completion α) := ⟨Completion.map₂ (· + ·)⟩ ``` to this: ```lean @[to_additive] instance [UniformSpace α] [Mul α] : Mul (Completion α) := ⟨Completion.map₂ (· * ·)⟩ ``` However, as Eric Wieser pointed out, doing so would create a bad diamond with the definition ```lean instance [UniformSpace α] [TopologicalRing α] [UniformAddGroup α] [Ring α] : Mul (Completion α) := ⟨curry <| (denseInducing_coe.prod denseInducing_coe).extend ((↑) ∘ uncurry (· * ·))⟩ ``` in `Topology.Algebra.UniformRing`. How should this diamond be resolved? Well, the definition of multiplication that uses `curry <| (denseInducing_coe.prod denseInducing_coe).extend ((↑) ∘ uncurry (· * ·))` is the "correct" one. For example, it yields the correct result if `α` is `ℚ`, unlike the definition that uses `Completion.map₂ (· * ·)`. (This is because `Completion.map₂` yields junk values if used on a function which is not uniformly continuous. Note, however, that if multiplication on `α` *is* uniformly continuous, then `Completion.map₂ (· * ·)` and `curry <| (denseInducing_coe.prod denseInducing_coe).extend ((↑) ∘ uncurry (· * ·))` are propositionally equal.) So, following Eric's suggestion, we remove the definition that uses `Completion.map₂ (· * ·)`, and generalize the other definition to any uniform space with a multiplication operation: ```lean @[to_additive] noncomputable instance [UniformSpace α] [Mul α] : Mul (Completion α) := ⟨curry <| (denseInducing_coe.prod denseInducing_coe).extend ((↑) ∘ uncurry (· * ·))⟩ ``` This requires slightly modifying some of the proofs in `Topology.Algebra.GroupCompletion`. For example, suppose that `α` is a uniform group. Since we can no longer use `Completion.continuous_map₂`, it becomes more efficient to prove that the multiplication, inversion, and division operations on `Completion α` are uniformly continuous *before* we prove that `Completion α` is a group. - Previously, `Topology.Algebra.GroupCompletion` had an instance: ```lean instance [UniformSpace α] [Sub α] : Sub (Completion α) := ... ``` Naively multiplicativizing this would yield ```lean @[to_additive] instance [UniformSpace α] [Inv α] : Inv (Completion α) := ... ``` Unfortunately, this would conflict with `Topology.Algebra.UniformField`, which already instantiates `Inv (Completion α)` when `α` is a uniform field. Instead, we use two different `instance` declarations. (If `α` is an additive group, then this instantiates `Neg (Completion α)` twice, and the instances are syntactically equal.) ```lean @[to_additive] noncomputable instance [UniformSpace α] [Group α] : Inv (Completion α) := ... instance [UniformSpace α] [Neg α] : Neg (Completion α) := ... ``` This avoids the bad diamond (because a uniform field can never be a `Group`) while remaining backward compatible. Note that the `@[to_additive]` is necessary here, because it maintains the link between the additive setting and multiplicative setting. We use a similar method to instantiate `Div (Completion α)`. - Some definitions in this file involve a module structure on `α`. We leave these as is and do not attempt to multiplicativize them at all. - The instance of `DistribMulAction` must be multiplicativized to an instance of `MulDistribMulAction` manually. Zulip thread: https://leanprover.zulipchat.com/#narrow/stream/287929-mathlib4/topic/Completion.20of.20a.20uniform.20multiplicative.20group --- # (Small) Issue Recall the following trick that this pull request uses to define inversion and negation on uniform spaces. The idea is that we define negation on the completion of any uniform space that has a negation operation, but we define inversion on only the completion of a uniform space that has the structure of a multiplicative group. We do this to avoid creating a bad diamond with the inversion operation on a uniform field. ```lean @[to_additive] noncomputable instance {α : Type*} [UniformSpace α] [Group α] : Inv (Completion α) := ... instance {α : Type*} [UniformSpace α] [Neg α] : Neg (Completion α) := ... ``` Now, suppose that we want to prove `coe_inv_of_group` (resp. `coe_neg`), which states that the coercion `α → Completion α` commutes with inversion (resp. negation). In the current version of this pull request, `coe_inv_of_group` (resp. `coe_neg`) only applies to uniform multiplicative (resp. additive) groups. However, we do not use the fact that multiplication (resp. addition) on `α` is uniformly continuous to prove it. We only use the fact that inversion (resp. negation) is continuous. So, what we really want is to have more general statements that look like this: ```lean theorem coe_inv_of_group {α : Type*} [UniformSpace α] [Group α] [ContinuousInv α] : ... theorem coe_neg {α : Type*} [UniformSpace α] [Neg α] [ContinuousNeg α] : ... ``` Note that `coe_inv_of_group` needs the assumption `[Group α]`, because otherwise inversion is not defined on `Completion α` at all. However, `coe_neg` does not need the analogous assumption `[AdditiveGroup α]`. The question is: If `coe_inv_of_group` and `coe_neg` are written in this more general form, how can we link them using `@[to_additive]`? Here is one option, but it obviously leaves something to be desired. ```lean @[to_additive coe_neg_do_not_use_this_use_the_more_general_version] theorem coe_inv_of_group {α : Type*} [UniformSpace α] [Group α] [ContinuousInv α] : ... theorem coe_neg {α : Type*} [UniformSpace α] [Neg α] [ContinuousNeg α] : ... ``` Co-authored-by: Eric Wieser --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) WIP t-algebra merge-conflict help-wanted t-topology
label:t-algebra$
 342/217 Mathlib/Analysis/InnerProductSpace/Completion.lean,Mathlib/Analysis/Normed/Group/HomCompletion.lean,Mathlib/Analysis/Normed/Module/Completion.lean,Mathlib/Topology/Algebra/GroupCompletion.lean,Mathlib/Topology/Algebra/InfiniteSum/GroupCompletion.lean,Mathlib/Topology/Algebra/Nonarchimedean/Completion.lean,Mathlib/Topology/Algebra/UniformField.lean,Mathlib/Topology/Algebra/UniformMulAction.lean,Mathlib/Topology/Algebra/UniformRing.lean 9 14 ['eric-wieser', 'github-actions', 'trivial1711'] nobody
477-4948
1 year ago
506-17227
506 days ago
101-63310
101 days
12670 trivial1711
author:trivial1711
 feat: completion of a nonarchimedean multiplicative group We prove that the completion of a nonarchimedean multiplicative group is a nonarchimedean multiplicative group. --- - [x] depends on: #12669 - [ ] depends on: #11837 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-algebra t-topology blocked-by-other-PR
label:t-algebra$
 358/228 Mathlib/Analysis/InnerProductSpace/Completion.lean,Mathlib/Analysis/Normed/Group/HomCompletion.lean,Mathlib/Analysis/Normed/Module/Completion.lean,Mathlib/Topology/Algebra/GroupCompletion.lean,Mathlib/Topology/Algebra/InfiniteSum/GroupCompletion.lean,Mathlib/Topology/Algebra/Nonarchimedean/Completion.lean,Mathlib/Topology/Algebra/UniformField.lean,Mathlib/Topology/Algebra/UniformMulAction.lean,Mathlib/Topology/Algebra/UniformRing.lean 9 2 ['github-actions', 'leanprover-community-mathlib4-bot'] nobody
477-4825
1 year ago
503-72681
503 days ago
50-17994
50 days
9449 hmonroe
author:hmonroe
 feat: Add Turing machine with the quintet definition (TMQ) and a chainable step function for each TM type --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-computability awaiting-author 458/1 Mathlib/Computability/TuringMachine.lean,Mathlib/Logic/PartArith.lean 2 8 ['eric-wieser', 'github-actions', 'hmonroe'] nobody
471-56027
1 year ago
815-69079
815 days ago
53-6945
53 days
19697 quangvdao
author:quangvdao
 feat(BigOperators/Fin): Sum/product over `Fin` intervals This PR adds new theorems about the sum/product of some vector over `Fin` intervals. One example is: ``` @[to_additive] theorem prod_Iic_succ (i : Fin n) : ∏ j ∈ Iic i.succ, v j = (∏ j ∈ Iic i.castSucc, v j) * v i.succ ``` --- - [x] depends on: #20360 This is in preparation for reworking `finSigmaFinEquiv` and `finProdFinEquiv` in #19013. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict awaiting-author t-data 87/12 Mathlib/Algebra/BigOperators/Fin.lean,Mathlib/Data/Fintype/Fin.lean,Mathlib/Order/Interval/Finset/Fin.lean 3 20 ['Ruben-VandeVelde', 'YaelDillies', 'eric-wieser', 'github-actions', 'mathlib4-dependent-issues-bot', 'quangvdao'] nobody
469-12045
1 year ago
503-47975
503 days ago
6-25961
6 days
19353 hrmacbeth
author:hrmacbeth
 chore: golf some term/rw proofs using `linear_combination` --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict WIP 47/102 Archive/Wiedijk100Theorems/SumOfPrimeReciprocalsDiverges.lean,Mathlib/Analysis/Convex/Slope.lean,Mathlib/Analysis/Seminorm.lean,Mathlib/MeasureTheory/Integral/RieszMarkovKakutani.lean,Mathlib/NumberTheory/Modular.lean,Mathlib/NumberTheory/Zsqrtd/Basic.lean,Mathlib/Topology/ContinuousMap/ZeroAtInfty.lean 7 5 ['github-actions', 'grunweg', 'hrmacbeth', 'leanprover-bot'] grunweg
assignee:grunweg
468-11166
1 year ago
546-60410
546 days ago
0-7781
2 hours
20248 peabrainiac
author:peabrainiac
 feat(Topology/Compactness): first-countable locally path-connected spaces are delta-generated Shows that all first-countable locally path-connected spaces are delta-generated (so in particular all normed spaces and convex subsets thereof are), and that delta-generated spaces are equivalently generated by the unit interval or standard simplices. --- - [ ] depends on: #21616 In principle, this should be close to all that's required to show that all simplicial complexes and CW-complexes are delta-generated; I just haven't done it yet because I'm not sure which file to best do it in. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) blocked-by-other-PR large-import new-contributor merge-conflict awaiting-author t-topology 1189/813 Mathlib.lean,Mathlib/Geometry/Manifold/ChartedSpace.lean,Mathlib/Topology/Algebra/Module/LocallyConvex.lean,Mathlib/Topology/Compactness/DeltaGeneratedSpace.lean,Mathlib/Topology/Connected/LocPathConnected.lean,Mathlib/Topology/Connected/PathConnected.lean,Mathlib/Topology/ContinuousOn.lean,Mathlib/Topology/Homotopy/HSpaces.lean,Mathlib/Topology/Path.lean 9 22 ['YaelDillies', 'github-actions', 'kbuzzard', 'mathlib4-dependent-issues-bot', 'peabrainiac'] nobody
466-80560
1 year ago
473-45077
473 days ago
39-21495
39 days
10678 adri326
author:adri326
 feat(Topology/UniformSpace): prove that a uniform space is completely regular Provides the pseudometric definition of a uniform space (for any open set `s` and `x ∈ s`, there exists a finite family of pseudometric spaces on `X` and an `ε > 0`, such that the intersection of the balls of these pseudometric spaces is a subset of `s`), and uses it to prove that `UniformSpace X` implies `CompletelyRegularSpace X`. --- This PR aims to close the gap of pi-base's theorem [T345](https://topology.pi-base.org/theorems/T000345), which says that topological groups are completely regular. We already have a proof that topological groups are uniform, but it turns out that we do not have any connection between `UniformSpace X` and `CompletelyRegularSpace X`. There is an equivalence between `UniformSpace X` and `CompletelyRegularSpace X`: the former implies the latter, and the latter implies *the existence of* the former. This PR provides the first half of this equivalence. The construction of the pseudometric definition is based on N. Bourbaki, Chapter 9, Theorem 4.1 The proof that a uniform space is completely regular is based on [the outline on mathexchange](https://math.stackexchange.com/questions/494718/how-to-prove-that-every-uniform-space-is-completely-regular). I tried to outline the major steps of the different proofs inside of comments; I can happily be more verbose to clear up any confusion. See [the corresponding Zulip discussion](https://leanprover.zulipchat.com/#narrow/stream/287929-mathlib4/topic/Some.20missing.2C.20accessible.2C.20topology.20results) for more context. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict awaiting-author t-topology 332/0 Mathlib.lean,Mathlib/Topology/UniformSpace/Basic.lean,Mathlib/Topology/UniformSpace/CompletelyRegular.lean 3 6 ['ADedecker', 'adri326'] ADedecker
assignee:ADedecker
466-5577
1 year ago
807-29256
807 days ago
17-44804
17 days
18785 erdOne
author:erdOne
 feat(CategoryTheory): command that generates instances for `MorphismProperty` Co-authored-by: Calle Sönne --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict awaiting-author t-category-theory t-meta 369/0 Mathlib.lean,Mathlib/CategoryTheory/MorphismProperty/Tactic.lean,MathlibTest/AddMorphismPropertyInstances.lean,scripts/noshake.json 4 19 ['alexjbest', 'chrisflav', 'erdOne', 'github-actions', 'grunweg', 'jcommelin', 'joelriou'] nobody
464-22087
1 year ago
485-50357
485 days ago
52-4682
52 days
16311 madvorak
author:madvorak
 feat(Computability): regular languages are context-free --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict WIP t-computability 72/0 Mathlib.lean,Mathlib/Computability/Chomsky.lean,Mathlib/Computability/ContextFreeGrammar.lean 3 7 ['Rida-Hamadani', 'YaelDillies', 'github-actions', 'madvorak'] nobody
462-28506
1 year ago
unknown
0-0
0 seconds
19943 AlexLoitzl
author:AlexLoitzl
 feat(Computability): Add Chomsky Normal Form Grammar and translation - Define Chomsky normal form grammars - Add language-preserving translation between context-free grammars and Chomsky normal form grammars Co-authored-by: Martin Dvorak martin.dvorak@matfyz.cz --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-computability awaiting-author new-contributor 3151/0 Mathlib.lean,Mathlib/Computability/ChomskyNormalForm/Basic.lean,Mathlib/Computability/ChomskyNormalForm/EmptyElimination.lean,Mathlib/Computability/ChomskyNormalForm/LengthRestriction.lean,Mathlib/Computability/ChomskyNormalForm/TerminalRestriction.lean,Mathlib/Computability/ChomskyNormalForm/Translation.lean,Mathlib/Computability/ChomskyNormalForm/UnitElimination.lean,Mathlib/Computability/ContextFreeGrammar.lean 8 59 ['AlexLoitzl', 'YaelDillies', 'github-actions', 'kim-em', 'madvorak'] nobody
462-28259
1 year ago
469-39881
469 days ago
37-29014
37 days
21501 sksgurdldi
author:sksgurdldi
 feat(List): add sum_zipWith_eq_finset_sum ### **Description:** This PR adds the lemma `List.sum_zipWith_eq_finset_sum` to `Mathlib.Algebra.BigOperators.Group.Finset.Basic`. #### **Statement:** The sum of the `zipWith` operation on two lists equals the sum of applying the operation to corresponding elements of the two lists, indexed over the minimum of their lengths. #### **Formal Statement:** ```lean lemma sum_zipWith_eq_finset_sum [Inhabited α] [Inhabited β] [AddCommMonoid γ] {op : α → β → γ} (l : List α) (m : List β) : (List.zipWith op l m).sum = ∑ x ∈ (Finset.range (Nat.min l.length m.length)), op (l[x]!) (m[x]!) ``` #### **Remarks:** - This lemma provides a useful equivalence between `List.zipWith` and summation over a `Finset.range` indexed by `Nat.min l.length m.length`. - It can be helpful in algebraic manipulations involving list-based summations. #### **Dependencies:** No additional dependencies. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) awaiting-author t-algebra new-contributor
label:t-algebra$
 43/0 Mathlib/Algebra/BigOperators/Group/Finset/Basic.lean 1 1 ['github-actions', 'j-loreaux'] nobody
456-83430
1 year ago
456-83430
456 days ago
13-33168
13 days
12054 adomani
author:adomani
 feat: auto-bugs This PR introduces a linter for suggesting bugs in tactics. See * #12077 * #12083 * #12084 for some bugs exposed by the test suite. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict awaiting-author t-meta 737/0 Mathlib.lean,Mathlib/Tactic.lean,Mathlib/Tactic/Linter/MetaTesting.lean,scripts/noshake.json,test/MetaTesting.lean 5 20 ['adomani', 'eric-wieser', 'github-actions', 'joneugster', 'kim-em'] joneugster
assignee:joneugster
456-71087
1 year ago
669-43105
669 days ago
45-6051
45 days
5062 adomani
author:adomani
 feat(Tactic/Prune + test/Prune): add `prune` tactic, for removing unnecessary hypotheses This tactic removes very conservatively all local declarations that 1. do not appear in the main goal, 2. do not appear in a declaration that appears in the main goal, 3. ... and so on recursively. The main motivation for this tactic is that all available variables in the current `namespace/section` appear in the goal state, not just the ones that are needed for the statement to type-check. Using `prune` mitigates this situation. The tactic also admits an optional natural number argument: `prune n` removes all variables that have not appeared at the `(n+1)`-st stage in the above list. Thus, `prune 0` only leaves the variables needed for the statement to type-check. Also, for sufficiently large `n`, `prune n` is a synonym for `prune`. [Zulip discussion](https://leanprover.zulipchat.com/#narrow/stream/270676-lean4/topic/substitute.20for.20.60include.2Fomit.60.3F) --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict modifies-tactic-syntax awaiting-author t-meta 181/0 Mathlib.lean,Mathlib/Tactic.lean,Mathlib/Tactic/Prune.lean,test/Prune.lean 4 5 ['adomani', 'j-loreaux', 'kmill'] nobody
456-38394
1 year ago
877-23725
877 days ago
195-57118
195 days
21433 grunweg
author:grunweg
 chore: change more lemmas to be about enorm instead of nnnorm --- - [x] depends on: #21782 - [x] depends on: #21783 (and this PR modifies the file split, and file splits are painful to merge over) [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict awaiting-author carleson t-measure-probability 172/71 Mathlib/Analysis/Distribution/SchwartzSpace.lean,Mathlib/Analysis/Normed/Group/Basic.lean,Mathlib/Analysis/SpecialFunctions/Pow/NNReal.lean,Mathlib/Data/ENNReal/Basic.lean,Mathlib/MeasureTheory/Function/LpSeminorm/Basic.lean,Mathlib/MeasureTheory/Function/LpSeminorm/CompareExp.lean,Mathlib/MeasureTheory/Function/LpSpace/Basic.lean,Mathlib/MeasureTheory/Function/LpSpace/ContinuousFunctions.lean,Mathlib/MeasureTheory/Function/UniformIntegrable.lean 9 18 ['RemyDegenne', 'github-actions', 'grunweg', 'j-loreaux', 'mathlib4-dependent-issues-bot'] nobody
455-3247
1 year ago
461-85712
461 days ago
2-37989
2 days
20454 urkud
author:urkud
 chore(TangentCone): review names Also add some `@[simp]` attrs. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-analysis 201/139 Mathlib/Analysis/Analytic/IteratedFDeriv.lean,Mathlib/Analysis/Calculus/ContDiff/Basic.lean,Mathlib/Analysis/Calculus/ContDiff/Bounds.lean,Mathlib/Analysis/Calculus/ContDiff/Defs.lean,Mathlib/Analysis/Calculus/ContDiff/FTaylorSeries.lean,Mathlib/Analysis/Calculus/Deriv/Abs.lean,Mathlib/Analysis/Calculus/Deriv/Basic.lean,Mathlib/Analysis/Calculus/FDeriv/Add.lean,Mathlib/Analysis/Calculus/FDeriv/Basic.lean,Mathlib/Analysis/Calculus/FDeriv/Equiv.lean,Mathlib/Analysis/Calculus/FDeriv/Measurable.lean,Mathlib/Analysis/Calculus/FDeriv/RestrictScalars.lean,Mathlib/Analysis/Calculus/FDeriv/Symmetric.lean,Mathlib/Analysis/Calculus/IteratedDeriv/Lemmas.lean,Mathlib/Analysis/Calculus/MeanValue.lean,Mathlib/Analysis/Calculus/TangentCone.lean,Mathlib/Analysis/Calculus/Taylor.lean,Mathlib/Analysis/Calculus/VectorField.lean,Mathlib/Analysis/Convex/SpecificFunctions/Deriv.lean,Mathlib/Analysis/SpecialFunctions/Trigonometric/InverseDeriv.lean,Mathlib/Geometry/Manifold/Instances/Real.lean,Mathlib/Geometry/Manifold/IsManifold/Basic.lean,Mathlib/Geometry/Manifold/MFDeriv/UniqueDifferential.lean,Mathlib/Geometry/Manifold/VectorBundle/Tangent.lean,Mathlib/MeasureTheory/Integral/FundThmCalculus.lean 25 3 ['github-actions', 'sgouezel', 'urkud'] nobody
450-49827
1 year ago
500-3190
500 days ago
4-8272
4 days
16550 awainverse
author:awainverse
 feat(ModelTheory): A typeclass for languages expanding other languages Defines `L.Expands L'` to consist of a privileged injective inclusion, `L'.Inclusion L`, from `L'` to `L`, corresponding to one language being a subset of the other in set-theoretic foundations. Replaces `L.IsOrdered` with `L.Expands Language.order` and `L.OrderLHom` with `Language.order.Inclusion L` Redefines `leSymb` in terms of `Language.order.Inclusion L` Deletions: - `FirstOrder.Language.IsOrdered` - `FirstOrder.Language.OrderLHom` - `instance : IsOrdered Language.order` - `sum.instIsOrdered` --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict awaiting-author t-logic 97/43 Mathlib/ModelTheory/LanguageMap.lean,Mathlib/ModelTheory/Order.lean 2 9 ['YaelDillies', 'awainverse', 'github-actions'] nobody
450-2295
1 year ago
622-33526
622 days ago
0-61590
17 hours
10823 alexkeizer
author:alexkeizer
 feat: convert curried type functions into uncurried type functions Adds a conversion `TypeFun.ofCurried : CurriedTypeFun.{u, v} n -> TypeFun.{u, v} n`, where `CurriedTypeFun.{u,v} n` is a (def-eq) abbreviation for `Type u -> ... -> Type u -> Type v`, i.e., the type of *curried* functions taking `n` arguments of type `Type u` to return an element of `Type v`, and `TypeFun.{u, v} n` is an abbreviation for `TypeVec.{u} n -> Type v`. It is generally more idiomatic to define type functions with multiple arguments in the curried style, but in the QPF development we use the uncurried equivalent `TypeVec n -> Type _`. Thus, having a canonical conversion from curried functions to uncurried gives us a canonical way to ask if a curried type function, say `Sum` is a QPF (namely, "is there an instance of `MvQPF (TypeFun.ofCurried Sum)`"). --- This is code ported from https://github.com/alexkeizer/QpfTypes, where this conversion is crucial in presenting a high-level interface, in terms of idiomatic, curried, type functions to users, while being built on QPFs (and thus, uncurried typefunctions) underneath. There is also a conversion in the other direction, from uncurried to curried, which I've decided to PR later, to keep this PR smaller and hopefully easier to review. - [x] depends on: #10818 (all changes to `Fin2.lean` are part of 10818, not the current PR) [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict awaiting-author t-data 66/0 Mathlib.lean,Mathlib/Data/TypeFun.lean 2 9 ['YaelDillies', 'alexkeizer', 'github-actions', 'leanprover-community-mathlib4-bot'] nobody
447-14888
1 year ago
697-85888
697 days ago
15-9013
15 days
13648 urkud
author:urkud
 feat(Topology/Module): generalize `ContinuousLinearMap.compSL` Generalize `ContinuousLinearMap.compSL` to topological vector spaces. --- - [ ] depends on: #15217 This PR is not polished yet, but the main statement is there. @ADedecker This answers a question I asked you on Zulip a few months ago. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra merge-conflict awaiting-author t-topology t-analysis
label:t-algebra$
 23/18 Mathlib/Analysis/NormedSpace/OperatorNorm/Bilinear.lean,Mathlib/Topology/Algebra/Module/StrongTopology.lean 2 5 ['fpvandoorn', 'github-actions', 'mathlib4-dependent-issues-bot', 'urkud'] nobody
445-37978
1 year ago
683-20905
683 days ago
28-69042
28 days
20636 eric-wieser
author:eric-wieser
 feat: multiplication of intervals in rings --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) awaiting-author t-algebra
label:t-algebra$
 36/1 Mathlib/Algebra/Order/Interval/Basic.lean 1 16 ['Timeroot', 'YaelDillies', 'eric-wieser', 'github-actions'] nobody
444-9947
1 year ago
480-13724
480 days ago
17-17852
17 days
22340 sinhp
author:sinhp
 feat(CategoryTheory): Locally Cartesian Closed Categories (Beck-Chevalley Conditions) Building on top of the API of `ExponentiableMorphism` in #22321, we state and prove Beck-Chevalley conditions. This will be crucial for our development of polynomial functors along exponentiable morphisms. Co-authored-by: Emily Riehl --- - [ ] depends on: #22321 - [ ] depends on: #22319 - [ ] depends on: #21525 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) WIP blocked-by-other-PR t-category-theory large-import merge-conflict 1144/24 Mathlib.lean,Mathlib/CategoryTheory/Comma/Over/Basic.lean,Mathlib/CategoryTheory/Comma/Over/Pullback.lean,Mathlib/CategoryTheory/Comma/Over/Sections.lean,Mathlib/CategoryTheory/Galois/Examples.lean,Mathlib/CategoryTheory/LocallyCartesianClosed/Basic.lean,Mathlib/CategoryTheory/LocallyCartesianClosed/BeckChevalley.lean,docs/references.bib 8 2 ['github-actions', 'mathlib4-dependent-issues-bot'] nobody
443-26529
1 year ago
450-8456
450 days ago
0-17
17 seconds
21959 BGuillemet
author:BGuillemet
 feat(Topology/ContinuousMap): Stone-Weierstrass theorem for MvPolynomial Add the subalgebra of multivariate polynomials and prove it separates points, on the same model as `ContinuousMap/Polynomial.lean`. Prove the Stone-Weierstrass theorem and some variations for multivariate polynomials. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-topology new-contributor 285/1 Mathlib.lean,Mathlib/Topology/ContinuousMap/MvPolynomial.lean,Mathlib/Topology/ContinuousMap/StoneWeierstrass.lean 3 1 ['github-actions'] nobody
443-22871
1 year ago
443-22871
443 days ago
16-76141
16 days
18470 FR-vdash-bot
author:FR-vdash-bot
 perf: lower the priority of `Normed*.to*` instances --- From #7873. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict slow-typeclass-synthesis t-algebra t-analysis
label:t-algebra$
 28/0 Mathlib/Analysis/Normed/Field/Basic.lean,Mathlib/Analysis/Normed/Group/Basic.lean 2 9 ['astrainfinita', 'github-actions', 'jcommelin', 'leanprover-bot'] nobody
438-80698
1 year ago
438-80698
438 days ago
129-16341
129 days
17368 Felix-Weilacher
author:Felix-Weilacher
 feat(Topology/Baire/BaireMeasurable): add the Kuratowski-Ulam theorem Add the Kuratowski-Ulam theorem, which one can think of as a "Fubini" for Baire category. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-topology 187/1 Mathlib/MeasureTheory/MeasurableSpace/Basic.lean,Mathlib/Order/Filter/Basic.lean,Mathlib/Topology/Baire/BaireMeasurable.lean,Mathlib/Topology/Constructions.lean,Mathlib/Topology/GDelta/Basic.lean 5 6 ['Felix-Weilacher', 'github-actions', 'urkud'] nobody
437-18367
1 year ago
574-29886
574 days ago
22-48725
22 days
8767 eric-wieser
author:eric-wieser
 refactor(Cache): tidy lake-manifest parsing in Cache This now respects local copies of Mathlib dependencies (though in practice these invalidate the *online* cache because to point to local copies of Mathlib, the hash for `lakefile.lean` and `lake-manifest.json` is first invalidated). --- - [x] depends on: #11492 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-meta 49/49 Cache/Hashing.lean,Cache/IO.lean,lake-manifest.json 3 8 ['digama0', 'eric-wieser', 'github-actions', 'leanprover-community-mathlib4-bot'] nobody
435-80430
1 year ago
617-46380
617 days ago
119-35643
119 days
15578 znssong
author:znssong
 feat(Function): Fixed points of function `f` with `f(x) >= x` We added some lemmas of fixed points of function `f` with `f(x) >= x`, where `f : α → α` is a function on a finite type `α`. This will be needed in proof of Bondy-Chvátal theorem. --- See also branch `meow-sister/BondyChvatal`. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict awaiting-author t-analysis new-contributor 82/0 Mathlib.lean,Mathlib/Dynamics/FixedPoints/Basic.lean,Mathlib/Dynamics/FixedPoints/Increasing.lean 3 32 ['Ruben-VandeVelde', 'YaelDillies', 'github-actions', 'urkud', 'vihdzp', 'znssong'] nobody
435-18697
1 year ago
618-21926
618 days ago
29-48368
29 days
22660 Ruben-VandeVelde
author:Ruben-VandeVelde
 chore: follow naming convention around Group.IsNilpotent --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-algebra
label:t-algebra$
 133/67 Mathlib/GroupTheory/Frattini.lean,Mathlib/GroupTheory/Nilpotent.lean,Mathlib/GroupTheory/SpecificGroups/ZGroup.lean 3 1 ['github-actions'] nobody
431-45126
1 year ago
431-45126
431 days ago
10-48025
10 days
13999 adomani
author:adomani
 feat: a linter to flag potential confusing conventions Currently, the linter flags all uses of * `a - b` where `a b : Nat`; * `a / b` where `a b : Nat` or `a b : Int`; * `a / 0` more or less whenever the type of `a` has a `0` and a division. This comes up often when starting to use Lean and hopefully the flag can help mitigate initial confusions. When the local context contains the relevant inequality/divisibility hypothesis, the linter is quiet. A recent [Zulip discussion](https://leanprover.zulipchat.com/#narrow/stream/113489-new-members/topic/not.20understanding.20deliberate.20error.20with.20.60ring.60.20over.20.E2.84.95/near/445879310) --- To make sure that the linter does not produce errors, #14007 activates the linter on "all" of mathlib. The expectation is that no error is thrown, just warnings. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-linter awaiting-author 251/0 Mathlib.lean,Mathlib/Tactic.lean,Mathlib/Tactic/Linter/Papercut.lean,MathlibTest/Papercut.lean 4 24 ['Julian', 'YaelDillies', 'adomani', 'eric-wieser', 'github-actions'] nobody
430-77160
1 year ago
691-54651
691 days ago
7-47589
7 days
19013 quangvdao
author:quangvdao
 feat(Algebra/BigOperators/Fin): Add `finSigmaFinEquiv` This PR adds `finSigmaFinEquiv` which is the equivalence `(i : Fin m) × Fin (n i) ≃ Fin (∑ i, n i)`. This is the dependent version of `finProdFinEquiv`. CI should be passing, but there are two things I'd like feedback on: 1. When defining the mappings, I have to consider `m = 0` separately. Is there a more uniform definition? 2. I'm proving this as a step toward defining `Fin.join`, which is the analogue of `List.join`. I can now technically define `Fin.join` as: ``` variable {a : Fin n → ℕ} {α : (i : Fin n) → (j : Fin (a i)) → Sort*} def join (v : (i : Fin n) → (j : Fin (a i)) → α i j) (k : Fin (∑ i, a i)) : α (finSigmaFinEquiv.invFun k).1 (finSigmaFinEquiv.invFun k).2 := v (finSigmaFinEquiv.invFun k).1 (finSigmaFinEquiv.invFun k).2 ``` but this looks horrible. This highly motivates refactoring `invFun` as two new definitions: ``` def func1 {n : ℕ} (a : Fin n → ℕ) (k : Fin (∑ i, a i)) : Fin n := sorry def func2 {n : ℕ} (a : Fin n → ℕ) (k : Fin (∑ i, a i)) : Fin (a (func1 a k)) := sorry ``` I'm not sure what to call these functions. The analogues in the non-dependent case are `divNat` and `modNat`. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict awaiting-author t-algebra
label:t-algebra$
 92/16 Mathlib/Algebra/BigOperators/Fin.lean 1 14 ['YaelDillies', 'eric-wieser', 'github-actions', 'quangvdao'] nobody
429-12793
1 year ago
550-77121
550 days ago
3-28829
3 days
19227 adomani
author:adomani
 fix(CI): unwrap `lake test` in problem matcher ... and also add a `#guard_msgs` in `AssertImported` test, so that `lake test` properly fails. [Zulip discussion](https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/CI.3A.20noisy.20.22test.20mathlib.22/near/483126955) --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict awaiting-author CI 9/20 .github/build.in.yml,.github/workflows/bors.yml,.github/workflows/build.yml,.github/workflows/build_fork.yml,MathlibTest/AssertImported.lean 5 2 ['bryangingechen', 'github-actions'] nobody
426-31829
1 year ago
526-72500
526 days ago
22-71271
22 days
15774 kkytola
author:kkytola
 feat: Topology on `ENat` This PR may contain some results that are not in the PR that adds a toppology on `ENat`. --- The immediate motivation is to be able to make the right continuity statement of the extended floor function on `ENNReal`, when this floor function is made `ENat`valued as suggested in the PR review of #15269. The API here is modelled on the early parts of [the corresponding ENNReal file](https://leanprover-community.github.io/mathlib4_docs/Mathlib/Topology/Instances/ENNReal.html#top), although much of this case is more trivial. - [x] depends on: #15380 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict WIP t-topology t-order 161/9 Mathlib/Data/ENat/Basic.lean,Mathlib/Topology/Instances/ENat.lean 2 4 ['YaelDillies', 'github-actions', 'leanprover-community-mathlib4-bot'] nobody
421-75761
1 year ago
647-18904
647 days ago
0-6819
1 hour
20222 eric-wieser
author:eric-wieser
 feat: generalize lemmas about derivatives Rather than creating a huge diff by shuffling things around, this generalizes everything in-place and swaps between `section`s for topological and normed vector spaces. The rationale for this approach is that: * we may further generalize the results of this file, and this avoids us jumbling up the order multiple times unnecessarily. * this greatly reduces the chance of merge conflicts --- - [ ] depends on: #21065 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict blocked-by-other-PR t-analysis 554/50 Mathlib/Analysis/Calculus/Deriv/Basic.lean,Mathlib/Analysis/Calculus/FDeriv/Basic.lean,MathlibTest/Recall.lean 3 8 ['adomani', 'eric-wieser', 'github-actions', 'leanprover-bot', 'mathlib4-dependent-issues-bot'] nobody
417-46029
1 year ago
480-59271
480 days ago
7-27718
7 days
21018 markimunro
author:markimunro
 feat(Data/Matrix): add file with key definitions and theorems about elementary row operations Prove that each elementary row operation is equivalent to a multiplication by an elementary matrix, has another row operation which inverts it, and that each elementary matrix has a left inverse. This is a very large PR and I understand it will take time. This is my first one and will likely have issues but I will be ready to answer questions/fix them as soon as possible. Co-authored-by: Christopher Lynch --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-data enhancement new-contributor merge-conflict awaiting-author 1230/0 Mathlib.lean,Mathlib/Data/Matrix/ElementaryRowOperations.lean,Mathlib/Data/Matrix/GaussianElimination.lean,Mathlib/Data/Matrix/GaussianEliminationOld,Mathlib/Data/Matrix/oldnames,et --hard 18533caba32,lean-toolchain 7 17 ['chrisflav', 'eric-wieser', 'github-actions', 'j-loreaux', 'markimunro'] nobody
416-54096
1 year ago
441-83052
441 days ago
23-22681
23 days
23514 eric-wieser
author:eric-wieser
 refactor: smooth over Lattice/LinearOrder inheritance This fixes the forgetful inheritance in `CompleteLinearOrder` and `ConditionallyCompleteLinearOrder`, which previously did not carry `compare` fields. (edit: moved to #23515) The following is the inheritance diagram before, where the dotted lines are manual instances. Note that every lattice typeclass that extends `LinearOrder` has to implement another dotted line edge, and remember to copy all the necessary data fields. ```mermaid graph TD LinearOrder --> Min,Max; LinearOrder --> PartialOrder; Lattice --> PartialOrder; CompleteLinearOrder --> Lattice; ConditionallyCompleteLinearOrder --> Lattice; LinearOrder-.-> Lattice; CompleteLinearOrder -.-> LinearOrder; ConditionallyCompleteLinearOrder -.-> LinearOrder; ``` This change introduces two new auxiliary typeclasses, to encapsulate these troublesome edges. `LinearOrderedLattice` can be thought of as `LinearOrder`, but with `sup`/`inf` instead of `min`/`max`. This is crucial, because it ensures the duplicate fields are merged in `extends CompleteLattice X, LinearOrderedLattice X`, which would not be the case for `extends CompleteLattice X, LinearOrder X`. The result is: ```mermaid graph TD LinearOrder --> Min,Max; LinearOrder --> LinearOrderBase; LinearOrderBase --> PartialOrder; Lattice --> PartialOrder; LinearOrderedLattice -.-> LinearOrder; LinearOrderedLattice --> LinearOrderBase; LinearOrderedLattice --> Lattice; CompleteLinearOrder --> LinearOrderedLattice; ConditionallyCompleteLinearOrder --> LinearOrderedLattice; ``` --- - [ ] depends on: #23515 - [ ] [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict 85/66 Mathlib/Algebra/Order/Group/Defs.lean,Mathlib/Algebra/Order/Monoid/Defs.lean,Mathlib/Order/Basic.lean,Mathlib/Order/CompleteLattice/Defs.lean,Mathlib/Order/ConditionallyCompleteLattice/Defs.lean,Mathlib/Order/Defs/LinearOrder.lean,Mathlib/Order/Lattice.lean 7 2 ['github-actions', 'mathlib4-dependent-issues-bot'] nobody
415-79926
1 year ago
416-84865
416 days ago
0-172
2 minutes
22810 pechersky
author:pechersky
 feat(Counterexamples): metric space not induced by norm Because the distance is not homogeneous --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) - [x] depends on: #22845 merge-conflict WIP t-topology t-analysis 202/1 Counterexamples.lean,Counterexamples/NotBoundedSMulMetricSpace.lean,Mathlib.lean,Mathlib/Analysis/Normed/PiNat.lean,Mathlib/Topology/Algebra/Module/LocallyConvex.lean,Mathlib/Topology/MetricSpace/Polish.lean 6 21 ['eric-wieser', 'github-actions', 'loefflerd', 'mathlib4-dependent-issues-bot', 'pechersky'] nobody
415-29988
1 year ago
430-63479
430 days ago
0-82394
22 hours
13124 FR-vdash-bot
author:FR-vdash-bot
 chore: remove `CovariantClass` and `ContravariantClass` Lean cannot handle `CovariantClass` and `ContravariantClass` correctly - TC slowness - [Zulip](https://leanprover.zulipchat.com/#narrow/stream/287929-mathlib4/topic/TC.20slowness) - https://github.com/leanprover-community/mathlib4/issues/6646#issuecomment-1691792488 - It may also have made #6326 fail. - Needs a weird hack to find instance: #9252 --- - [x] depends on: #13154 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict WIP 602/486 Mathlib/Algebra/AddConstMap/Basic.lean,Mathlib/Algebra/Algebra/Operations.lean,Mathlib/Algebra/Algebra/Subalgebra/Pointwise.lean,Mathlib/Algebra/BigOperators/Group/Finset/Basic.lean,Mathlib/Algebra/BigOperators/Group/Multiset/Basic.lean,Mathlib/Algebra/Group/Subgroup/Pointwise.lean,Mathlib/Algebra/Group/Submonoid/Pointwise.lean,Mathlib/Algebra/Group/UniqueProds/Basic.lean,Mathlib/Algebra/Module/Submodule/Pointwise.lean,Mathlib/Algebra/MonoidAlgebra/Degree.lean,Mathlib/Algebra/Order/AddTorsor.lean,Mathlib/Algebra/Order/Group/Action.lean,Mathlib/Algebra/Order/Group/DenselyOrdered.lean,Mathlib/Algebra/Order/Group/Units.lean,Mathlib/Algebra/Order/GroupWithZero/Canonical.lean,Mathlib/Algebra/Order/GroupWithZero/Unbundled.lean,Mathlib/Algebra/Order/GroupWithZero/WithZero.lean,Mathlib/Algebra/Order/Monoid/Defs.lean,Mathlib/Algebra/Order/Monoid/Unbundled/Basic.lean,Mathlib/Algebra/Order/Monoid/Unbundled/Defs.lean,Mathlib/Algebra/Order/Monoid/Unbundled/OrderDual.lean,Mathlib/Algebra/Order/Monoid/Unbundled/WithTop.lean,Mathlib/Algebra/Order/Ring/Defs.lean,Mathlib/Algebra/Order/Ring/WithTop.lean,Mathlib/Algebra/Ring/Subring/Pointwise.lean,Mathlib/Algebra/Ring/Subsemiring/Pointwise.lean,Mathlib/Analysis/SumOverResidueClass.lean,Mathlib/Data/DFinsupp/Lex.lean,Mathlib/Data/Finsupp/Lex.lean,Mathlib/Data/NNRat/Defs.lean,Mathlib/GroupTheory/OrderOfElement.lean,Mathlib/Order/Filter/IsBounded.lean,Mathlib/Order/Filter/Pointwise.lean,Mathlib/Probability/Kernel/Defs.lean,Mathlib/RingTheory/Ideal/Pointwise.lean,Mathlib/RingTheory/Valuation/ValuationSubring.lean,Mathlib/Topology/Algebra/Order/LiminfLimsup.lean 37 6 ['MichaelStollBayreuth', 'astrainfinita', 'github-actions', 'leanprover-bot', 'mathlib4-dependent-issues-bot'] nobody
414-57965
1 year ago
unknown
0-0
0 seconds
15212 victorliu5296
author:victorliu5296
 feat: Add fundamental theorem of calculus-2 for Banach spaces add the Mean Value Theorem for Banach spaces to the library and include reference for the theorem statement This theorem states that if `f : X → Y` is differentiable along the line segment from `a` to `b`, then the change in `f` equals the integral of its derivative along this path. This extends the mean value theorem to Banach spaces. This can be used for the eventual proof of the Newton-Kantorovich theorem with 1 constant contained inside the added reference. Here is the discussion on Zulipchat: https://leanprover.zulipchat.com/#narrow/stream/287929-mathlib4/topic/Contributing.20FTC-2.20for.20Banach.20spaces t-measure-probability new-contributor merge-conflict awaiting-author t-analysis 60/1 Mathlib/MeasureTheory/Integral/FundThmCalculus.lean 1 3 ['github-actions', 'hrmacbeth', 'victorliu5296'] nobody
411-49085
1 year ago
605-26456
605 days ago
51-85104
51 days
22888 plp127
author:plp127
 perf: replace `Lean.Expr.swapBVars` with a better? implementation Replaces `Lean.Expr.swapBVars` with a version that traverses the expression. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) awaiting-author t-meta 14/12 Mathlib/Tactic/FunProp/ToBatteries.lean 1 23 ['eric-wieser', 'github-actions', 'joneugster', 'leanprover-bot', 'leanprover-community-mathlib4-bot', 'plp127'] eric-wieser and joneugster
assignee:eric-wieser assignee:joneugster
410-42130
1 year ago
431-5570
431 days ago
4-80306
4 days
22579 kvanvels
author:kvanvels
 doc(Topology/Defs/Induced): fix comments on three functions related to RestrictGenTopology --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-topology documentation awaiting-author 10/9 Mathlib/Topology/Defs/Induced.lean,Mathlib/Topology/RestrictGen.lean 2 4 ['github-actions', 'kvanvels', 'leanprover-community-bot-assistant', 'urkud'] nobody
408-55988
1 year ago
431-60365
431 days ago
12-18679
12 days
21488 imbrem
author:imbrem
 feat(CategoryTheory/Monoidal): premonoidal categories Add support for premonoidal categories --- Still want to add support for: - Premonoidal braided/symmetric categories - The monoidal coherence theorem, which I've already ported in my `discretion` library - The `coherence` tactic, which should work fine for premonoidal categories too but wanted to get this in front of reviewers ASAP to make sure my general approach was alright [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-category-theory new-contributor 900/361 Mathlib/Algebra/Category/ModuleCat/Presheaf/Monoidal.lean,Mathlib/CategoryTheory/Bicategory/End.lean,Mathlib/CategoryTheory/GradedObject/Monoidal.lean,Mathlib/CategoryTheory/Localization/Monoidal.lean,Mathlib/CategoryTheory/Monoidal/Braided/Basic.lean,Mathlib/CategoryTheory/Monoidal/Category.lean,Mathlib/CategoryTheory/Monoidal/Center.lean,Mathlib/CategoryTheory/Monoidal/CoherenceLemmas.lean,Mathlib/CategoryTheory/Monoidal/Discrete.lean,Mathlib/CategoryTheory/Monoidal/End.lean,Mathlib/CategoryTheory/Monoidal/Free/Basic.lean,Mathlib/CategoryTheory/Monoidal/Functor.lean,Mathlib/CategoryTheory/Monoidal/FunctorCategory.lean,Mathlib/CategoryTheory/Monoidal/Mon_.lean,Mathlib/CategoryTheory/Monoidal/Opposite.lean,Mathlib/CategoryTheory/Monoidal/Transport.lean,Mathlib/Tactic/CategoryTheory/Monoidal/Datatypes.lean,Mathlib/Tactic/CategoryTheory/Monoidal/Normalize.lean,Mathlib/Tactic/CategoryTheory/Monoidal/PureCoherence.lean,Mathlib/Tactic/CategoryTheory/MonoidalComp.lean,MathlibTest/StringDiagram.lean 21 9 ['YaelDillies', 'github-actions', 'grunweg', 'imbrem', 'kim-em', 'leanprover-community-bot-assistant'] nobody
408-31273
1 year ago
408-31274
408 days ago
58-6026
58 days
21525 sinhp
author:sinhp
 feat(CategoryTheory): Locally Cartesian Closed Categories (Prelim) This PR defines the basic preliminaries for defining locally cartesian closed categories (LCCCs). In particular, using the calculus of mates we define certain natural isomorphisms involving `Over.star` and `Over.pullback` which will be crucial in defining the right adjoint to the pullback functor in the development of LCCCs. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-category-theory large-import 338/24 Mathlib/CategoryTheory/Comma/Over/Basic.lean,Mathlib/CategoryTheory/Comma/Over/Pullback.lean,Mathlib/CategoryTheory/Galois/Examples.lean 3 13 ['b-mehta', 'github-actions', 'joelriou', 'leanprover-community-bot-assistant', 'sinhp'] nobody
408-31271
1 year ago
408-31273
408 days ago
36-69400
36 days
22319 sinhp
author:sinhp
 feat(CategoryTheory): Locally Cartesian Closed Categories (Sections Right Adjoint) we define the `Over.sections` functor in the file `CategoryTheory.Comma.Over.Sections` and prove that it is a right adjoint to the `Over.star`, thereby solving an existing TODO in `Over.pullback` file. The `sections` functor is used to define the right adjoint to the pullback functor `Over.pullback` in the development of LCCCs. Moreover, the rest of added lemmas and theorems to `CategoryTheory.Comma.Over.Pullback` are crucial for the development of LCCCs in the next PR. --- - [ ] depends on: #21525 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict blocked-by-other-PR t-category-theory large-import 547/24 Mathlib.lean,Mathlib/CategoryTheory/Comma/Over/Basic.lean,Mathlib/CategoryTheory/Comma/Over/Pullback.lean,Mathlib/CategoryTheory/Comma/Over/Sections.lean,Mathlib/CategoryTheory/Galois/Examples.lean 5 3 ['github-actions', 'leanprover-community-bot-assistant', 'mathlib4-dependent-issues-bot'] nobody
408-30744
1 year ago
450-34779
450 days ago
0-2084
34 minutes
22321 sinhp
author:sinhp
 feat(CategoryTheory): Locally Cartesian Closed Categories (Definition) This PR defines locally cartesian closed categories in terms of existence of the pushforward functors (right adjoint to the pullback functor) for all morphisms. We develop basic API and prove the following: 1. Existence of the pushforward functors is equivalent to cartesian closed slices. 2. Any locally cartesian closed category with a terminal object is cartesian closed. 3. The slices of a locally cartesian closed category are locally cartesian closed. Some of the content is based on the project of formalization of polynomial functors at the Trimester "Prospect of Formal Mathematics" at the Hausdorff Institute (HIM) in Bonn. https://github.com/sinhp/Poly I found this implementation of locally cartesian closed categories amenable to polynomial functors formalization. Co-authored-by: Emily Riehl --- - [ ] depends on: #21525 - [ ] depends on: #22319 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict blocked-by-other-PR t-category-theory large-import 812/24 Mathlib.lean,Mathlib/CategoryTheory/Comma/Over/Basic.lean,Mathlib/CategoryTheory/Comma/Over/Pullback.lean,Mathlib/CategoryTheory/Comma/Over/Sections.lean,Mathlib/CategoryTheory/Galois/Examples.lean,Mathlib/CategoryTheory/LocallyCartesianClosed/Basic.lean 6 3 ['github-actions', 'leanprover-community-bot-assistant', 'mathlib4-dependent-issues-bot'] nobody
408-30744
1 year ago
450-33520
450 days ago
0-336
5 minutes
19425 hrmacbeth
author:hrmacbeth
 perf: gcongr forward-reasoning adjustment This PR changes the "forward-reasoning" component of `gcongr`, rendering it more efficient, particularly in problems with a large number of variables/hypotheses in the context. Previously `gcongr` attempted to match *every* `LocalDecl` against *every* node in the parse tree using *each* of the five implemented `@[gcongr_forward]` mini-tactics: matching directly, matching after applying `symm`, matching after applying `le_of_lt`, etc etc. The new algorithm filters out the non-Prop `LocalDecl`s, and also adjusts the `@[gcongr_forward]` extensions so that, rather than re-apply the relevant lemmas (`symm`, `le_of_lt`, etc) at every node in the parse tree, the lemmas are applied in advance to the `LocalDecl`s and the result (if successful) stored. The performance effect on mathlib as a whole is miniscule, but it speeds up the profiler's count of "tactic execution of Mathlib.Tactic.GCongr" in the newly-added test from 257 ms to 47 ms, and has a similar effect on real-life examples in an analysis project of mine. Co-authored-by: Mario Carneiro --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) (Note that Mario provided the ideas but not the code, so please review with appropriate diligence!) merge-conflict awaiting-author 130/59 Mathlib/Order/Lattice.lean,Mathlib/Tactic/GCongr/Core.lean,Mathlib/Tactic/GCongr/ForwardAttr.lean,MathlibTest/GCongr/inequalities.lean 4 17 ['Vierkantor', 'github-actions', 'hrmacbeth', 'leanprover-bot', 'leanprover-community-bot-assistant'] Vierkantor
assignee:Vierkantor
407-43805
1 year ago
540-32222
540 days ago
1-41769
1 day
20873 vbeffara
author:vbeffara
 feat(Topology/Covering): path lifting and homotopy lifting This proves the existence and uniqueness of path and homotopy lifts through covering maps. --- I tried to separate as much of the proof as possible into separate PRs (which are already in Mathlib now), but the proof here relies on a monolithic construction of an explicit lift along a well-chosen subdivision, in `partial_lift`, with associated definitions. Only one standalone lean file added. An older WIP PR #10084 by Junyan Xu @alreadydone proves similar results using a very similar construction for path lifting, with a different argument to obtain continuity for homotopy lifting. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict awaiting-author t-topology new-contributor 281/1 Mathlib.lean,Mathlib/Topology/Covering/Basic.lean,Mathlib/Topology/Covering/Lift.lean 3 9 ['alreadydone', 'github-actions', 'grunweg', 'vbeffara'] nobody
407-34001
1 year ago
482-26761
482 days ago
5-5648
5 days
22817 peabrainiac
author:peabrainiac
 feat(CategoryTheory/Sites): local sites Defines local sites and shows that sheaves of types on them form a local topos, in that the global sections functor `Sheaf.Γ` has a right adjoint `Sheaf.codisc` that is fully faithful. --- - [x] depends on: #22816 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict WIP t-category-theory 263/0 Mathlib.lean,Mathlib/CategoryTheory/Limits/FunctorCategory/Shapes/Products.lean,Mathlib/CategoryTheory/Limits/Types.lean,Mathlib/CategoryTheory/Sites/GlobalSections.lean,Mathlib/CategoryTheory/Sites/LocalSite.lean,Mathlib/CategoryTheory/Sites/Sheaf.lean 6 4 ['github-actions', 'joelriou', 'mathlib4-dependent-issues-bot'] nobody
406-54010
1 year ago
437-55509
437 days ago
0-568
9 minutes
16314 FR-vdash-bot
author:FR-vdash-bot
 chore(Data/Quot): deprecate `ind*'` APIs --- - [x] depends on: #16264 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-data 247/287 Counterexamples/CliffordAlgebraNotInjective.lean,Mathlib/Algebra/Colimit/Module.lean,Mathlib/Algebra/Lie/Quotient.lean,Mathlib/Algebra/Module/Torsion.lean,Mathlib/Algebra/RingQuot.lean,Mathlib/Analysis/SpecialFunctions/Trigonometric/Angle.lean,Mathlib/CategoryTheory/ConnectedComponents.lean,Mathlib/CategoryTheory/Subobject/Basic.lean,Mathlib/CategoryTheory/Subobject/FactorThru.lean,Mathlib/CategoryTheory/Subobject/Lattice.lean,Mathlib/Computability/Reduce.lean,Mathlib/Computability/Tape.lean,Mathlib/Data/List/Cycle.lean,Mathlib/Data/Multiset/MapFold.lean,Mathlib/Data/Multiset/ZeroCons.lean,Mathlib/Data/Quot.lean,Mathlib/Data/Setoid/Basic.lean,Mathlib/Data/Setoid/Partition.lean,Mathlib/FieldTheory/Fixed.lean,Mathlib/GroupTheory/Complement.lean,Mathlib/GroupTheory/Congruence/Basic.lean,Mathlib/GroupTheory/Congruence/Defs.lean,Mathlib/GroupTheory/Congruence/Hom.lean,Mathlib/GroupTheory/Coset/Basic.lean,Mathlib/GroupTheory/Coset/Defs.lean,Mathlib/GroupTheory/FreeAbelianGroup.lean,Mathlib/GroupTheory/GroupAction/Basic.lean,Mathlib/GroupTheory/GroupAction/Defs.lean,Mathlib/GroupTheory/GroupAction/Quotient.lean,Mathlib/GroupTheory/Index.lean,Mathlib/GroupTheory/MonoidLocalization/Basic.lean,Mathlib/GroupTheory/PGroup.lean,Mathlib/GroupTheory/Perm/Cycle/Concrete.lean,Mathlib/GroupTheory/PresentedGroup.lean,Mathlib/GroupTheory/QuotientGroup/Basic.lean,Mathlib/GroupTheory/QuotientGroup/Defs.lean,Mathlib/GroupTheory/SchurZassenhaus.lean,Mathlib/GroupTheory/Sylow.lean,Mathlib/LinearAlgebra/Alternating/DomCoprod.lean,Mathlib/LinearAlgebra/Projectivization/Basic.lean,Mathlib/LinearAlgebra/Quotient/Basic.lean,Mathlib/LinearAlgebra/Quotient/Defs.lean,Mathlib/MeasureTheory/Function/AEEqFun.lean,Mathlib/NumberTheory/Padics/PadicNumbers.lean,Mathlib/NumberTheory/RamificationInertia/Basic.lean,Mathlib/Order/Antisymmetrization.lean,Mathlib/Order/Category/PartOrd.lean,Mathlib/Order/Filter/Germ/Basic.lean,Mathlib/RepresentationTheory/GroupCohomology/Hilbert90.lean,Mathlib/RingTheory/AdicCompletion/Algebra.lean,Mathlib/RingTheory/AdicCompletion/Basic.lean,Mathlib/RingTheory/AdicCompletion/Functoriality.lean,Mathlib/RingTheory/AdjoinRoot.lean,Mathlib/RingTheory/Congruence/Basic.lean,Mathlib/RingTheory/Flat/FaithfullyFlat/Basic.lean,Mathlib/RingTheory/GradedAlgebra/HomogeneousLocalization.lean,Mathlib/RingTheory/Ideal/Cotangent.lean,Mathlib/RingTheory/Ideal/Norm/AbsNorm.lean,Mathlib/RingTheory/Ideal/Quotient/Basic.lean,Mathlib/RingTheory/Ideal/Quotient/Defs.lean,Mathlib/RingTheory/Ideal/Quotient/Operations.lean,Mathlib/RingTheory/Valuation/Quotient.lean,Mathlib/Topology/Algebra/Group/TopologicalAbelianization.lean,Mathlib/Topology/Algebra/InfiniteSum/Module.lean,Mathlib/Topology/Separation/Basic.lean 65 4 ['github-actions', 'leanprover-community-bot-assistant', 'mathlib4-dependent-issues-bot'] nobody
402-56237
1 year ago
402-56239
402 days ago
55-52030
55 days
23509 eric-wieser
author:eric-wieser
 refactor: Make ENNReal an abbrev The `Coe` instance becomes `CoeTC` to match what we do for `WithTop` (such that the priority kicks in) Probably we could have both copies and things would be ok. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) This includes part of #23750 merge-conflict t-data 22/66 Mathlib/Data/ENNReal/Basic.lean,Mathlib/Data/ENNReal/BigOperators.lean,Mathlib/Data/ENNReal/Operations.lean,Mathlib/MeasureTheory/Integral/SetToL1.lean,Mathlib/MeasureTheory/Measure/Sub.lean,Mathlib/MeasureTheory/Measure/TightNormed.lean,Mathlib/Topology/MetricSpace/PartitionOfUnity.lean 7 22 ['eric-wieser', 'github-actions', 'leanprover-bot', 'leanprover-community-bot-assistant', 'leanprover-community-mathlib4-bot', 'mattrobball', 'urkud'] nobody
402-39890
1 year ago
404-24618
404 days ago
5-23475
5 days
11455 adomani
author:adomani
 fix: unsqueeze simp, re Yaël's comments on #11259 This PR reverts/simplifies some of the "squeeze `simp`" changes in #11259. See #11259 for context. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict awaiting-author 3/6 Mathlib/Algebra/Group/Conj.lean,Mathlib/Data/Seq/WSeq.lean 2 8 ['Ruben-VandeVelde', 'YaelDillies', 'grunweg', 'loefflerd', 'robertylewis', 'urkud'] nobody
402-1490
1 year ago
700-31397
700 days ago
93-60645
93 days
7325 eric-wieser
author:eric-wieser
 chore: use preimageIso instead of defeq abuse for InducedCategory This makes a few things slightly more verbose, but the type casts are now explicit in those places. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-category-theory awaiting-CI 22/21 Mathlib/CategoryTheory/EssentialImage.lean,Mathlib/CategoryTheory/Monoidal/Braided.lean,Mathlib/CategoryTheory/Monoidal/Subcategory.lean 3 1 ['grunweg'] nobody
402-1369
1 year ago
unknown
0-0
0 seconds
7874 astrainfinita
author:astrainfinita
 chore: make `IsScalarTower A A B` and `IsScalarTower A B B` higher priority --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict slow-typeclass-synthesis t-algebra awaiting-CI
label:t-algebra$
 10/9 Mathlib/Algebra/Algebra/Defs.lean,Mathlib/Algebra/Group/Action/Defs.lean,Mathlib/Data/Rat/Cast/Defs.lean,Mathlib/GroupTheory/GroupAction/Ring.lean 4 3 ['astrainfinita', 'grunweg', 'leanprover-bot'] nobody
402-1344
1 year ago
unknown
0-0
0 seconds
13038 adomani
author:adomani
 feat: Mathlib weekly reports This PR introduces a weekly cron job that computes a "global" report on the evolution of Mathlib in the previous week. It consists of * a CI workflow with a cron job that runs at minight on Sunday (`.github/workflows/mathlib_stats.yaml`); * a Lean file extracting a categorized list of "all" the declarations in Mathlib (`scripts/count_decls.lean`); * a bash file computing Git-diff-related information and collating the data from the Lean file (`scripts/mathlib_stats.sh`); * a convenience CI workflow that is triggered on adding the `test-ci` label and results in posting on the PR and on Zulip the report (`.github/workflows/mathlib_stats_label.yaml`). The second CI workflow is intended to be removed just before/right after the PR is ready to merge. [Zulip discussion](https://leanprover.zulipchat.com/#narrow/stream/113488-general) [Thread for the reports](https://leanprover.zulipchat.com/#narrow/stream/287929-mathlib4/topic/Mathlib.20weekly.20change.20report) --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) awaiting-author CI t-meta 338/0 .github/workflows/mathlib_stats.yaml,.github/workflows/mathlib_stats_label.yaml,scripts/count_decls.lean,scripts/mathlib_stats.sh 4 10 ['adomani', 'github-actions', 'grunweg', 'kim-em', 'kmill'] nobody
402-1302
1 year ago
676-19182
676 days ago
57-4374
57 days
5952 eric-wieser
author:eric-wieser
 feat: add Qq wrappers for ToExpr --- - [ ] depends on: #6699 (to appease the linter) [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict awaiting-CI t-meta 247/150 Mathlib/Data/Fin/Basic.lean,Mathlib/Data/Fin/VecNotation.lean,Mathlib/Data/Matrix/Notation.lean,Mathlib/Tactic/DeriveToExpr.lean,Mathlib/Tactic/FBinop.lean,Mathlib/Tactic/ToExpr.lean,Mathlib/Util/Qq.lean,test/DeriveToExpr.lean,test/vec_notation.lean 9 7 ['eric-wieser', 'gebner', 'grunweg', 'leanprover-community-mathlib4-bot'] nobody
402-1170
1 year ago
1008-44433
1008 days ago
29-67421
29 days
15483 FR-vdash-bot
author:FR-vdash-bot
 chore(GroupTheory/Coset): reduce defeq abuse --- - [x] depends on: #15482 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-algebra
label:t-algebra$
 114/60 Mathlib/GroupTheory/Commensurable.lean,Mathlib/GroupTheory/Coset.lean,Mathlib/GroupTheory/QuotientGroup.lean,Mathlib/LinearAlgebra/Alternating/DomCoprod.lean,Mathlib/MeasureTheory/Measure/Haar/Quotient.lean,Mathlib/Topology/Algebra/Group/Compact.lean 6 14 ['astrainfinita', 'eric-wieser', 'github-actions', 'grunweg', 'leanprover-bot', 'leanprover-community-mathlib4-bot', 'mattrobball', 'mergify', 'urkud'] nobody
402-1130
1 year ago
650-39460
650 days ago
4-79214
4 days
16594 FR-vdash-bot
author:FR-vdash-bot
 perf: reorder `extends` and remove some instances in algebra hierarchy --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict slow-typeclass-synthesis t-algebra
label:t-algebra$
 240/92 Mathlib.lean,Mathlib/Algebra/Algebra/Hom.lean,Mathlib/Algebra/Associated/Basic.lean,Mathlib/Algebra/BigOperators/Ring/List.lean,Mathlib/Algebra/Field/Defs.lean,Mathlib/Algebra/GCDMonoid/Basic.lean,Mathlib/Algebra/Group/Defs.lean,Mathlib/Algebra/Group/Ext.lean,Mathlib/Algebra/Group/Opposite.lean,Mathlib/Algebra/Group/Prod.lean,Mathlib/Algebra/GroupWithZero/Defs.lean,Mathlib/Algebra/GroupWithZero/Prod.lean,Mathlib/Algebra/Homology/Embedding/Basic.lean,Mathlib/Algebra/Order/AddGroupWithTop.lean,Mathlib/Algebra/Order/Field/Canonical/Defs.lean,Mathlib/Algebra/Order/Field/Defs.lean,Mathlib/Algebra/Order/Group/Unbundled/Abs.lean,Mathlib/Algebra/Order/GroupWithZero/Canonical.lean,Mathlib/Algebra/Order/Ring/Canonical.lean,Mathlib/Algebra/Order/Ring/Defs.lean,Mathlib/Algebra/Polynomial/Roots.lean,Mathlib/Algebra/Quaternion.lean,Mathlib/Algebra/Ring/Defs.lean,Mathlib/Algebra/Ring/Ext.lean,Mathlib/Algebra/Ring/InjSurj.lean,Mathlib/Algebra/Ring/Rat.lean,Mathlib/Algebra/Ring/SumsOfSquares.lean,Mathlib/Algebra/Tropical/Basic.lean,Mathlib/Analysis/CStarAlgebra/ContinuousFunctionalCalculus/Order.lean,Mathlib/Analysis/InnerProductSpace/Symmetric.lean,Mathlib/CategoryTheory/Preadditive/FunctorCategory.lean,Mathlib/Data/Finset/NoncommProd.lean,Mathlib/Data/Int/Cast/Defs.lean,Mathlib/FieldTheory/IsAlgClosed/AlgebraicClosure.lean,Mathlib/FieldTheory/SplittingField/Construction.lean,Mathlib/GroupTheory/Congruence/Basic.lean,Mathlib/GroupTheory/MonoidLocalization/MonoidWithZero.lean,Mathlib/GroupTheory/Torsion.lean,Mathlib/LinearAlgebra/LinearPMap.lean,Mathlib/LinearAlgebra/TensorProduct/Basic.lean,Mathlib/Order/Filter/Germ/Basic.lean,Mathlib/Order/Interval/Finset/Box.lean,Mathlib/RingTheory/Bialgebra/Hom.lean,Mathlib/RingTheory/Coalgebra/Hom.lean,Mathlib/RingTheory/Ideal/Quotient.lean,Mathlib/RingTheory/Perfection.lean,Mathlib/RingTheory/TensorProduct/Basic.lean,Mathlib/RingTheory/TensorProduct/MvPolynomial.lean,Mathlib/Util/NoInstances.lean,scripts/noshake.json 50 8 ['astrainfinita', 'github-actions', 'grunweg', 'leanprover-bot'] nobody
402-906
1 year ago
606-40453
606 days ago
14-58900
14 days
19467 quangvdao
author:quangvdao
 feat(MvPolynomial/Equiv): Add `MvPolynomial.finSuccEquivNth` This PR adds `MvPolynomial.finSuccEquivNth`, which is the algebra isomorphism between `MvPolynomial (Fin (n + 1)) R` and `Polynomial (MvPolynomial (Fin n) R)` by identifying the `p`-th variable as the indeterminate. This generalizes `MvPolynomial.finSuccEquiv` which is only for the `0`-th variable. The supporting theorems for the `Nth` version are identical to the current version, with the `Nth` version deduced from the former. These changes require new definitions in `Finsupp/Fin`, which is a separate PR. Co-authored-by: Yaël Dillies --- - [ ] depends on: #19315 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-algebra blocked-by-other-PR
label:t-algebra$
 541/163 Mathlib/Algebra/BigOperators/Fin.lean,Mathlib/Algebra/BigOperators/Finsupp.lean,Mathlib/Algebra/MvPolynomial/Equiv.lean,Mathlib/Data/Fin/Basic.lean,Mathlib/Data/Fin/Tuple/Basic.lean,Mathlib/Data/Finsupp/Fin.lean,scripts/nolints_prime_decls.txt 7 9 ['acmepjz', 'github-actions', 'grunweg', 'mathlib4-dependent-issues-bot', 'quangvdao'] nobody
400-5246
1 year ago
543-25212
543 days ago
0-790
13 minutes
20313 thefundamentaltheor3m
author:thefundamentaltheor3m
 feat(Data/Complex/Exponential): prove some useful results about the complex exponential. This PR proves two basic results about the complex exponential: * `abs_exp_mul_I (x : ℂ) : abs (Complex.exp (I * x)) = Real.exp (-x.im)` * `one_sub_rexp_re_le_abs_one_sub_cexp (x : ℂ) : 1 - Real.exp x.re ≤ Complex.abs (1 - Complex.exp x)` Both results were proved as part of the sphere packing project. There's a chance they're too specific for mathlib, but I thought they were worth PRing anyway. Would it also be a good idea to tag `abs_exp_mul_I` with `simp`? Feedback/suggestions welcome. Note: `one_sub_rexp_re_le_abs_one_sub_cexp` was proved by Bhavik Mehta @b-mehta --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-analysis new-contributor 167/141 Mathlib.lean,Mathlib/Analysis/Complex/Basic.lean,Mathlib/Analysis/SpecialFunctions/Log/ERealExp.lean,Mathlib/Analysis/SpecialFunctions/Trigonometric/Chebyshev.lean,Mathlib/Data/Complex/Exponential/Defs.lean,Mathlib/Data/Complex/Exponential/Lemmas.lean,Mathlib/Data/Complex/ExponentialBounds.lean,Mathlib/Tactic/FunProp.lean,MathlibTest/Recall.lean,MathlibTest/positivity.lean 10 12 ['b-mehta', 'github-actions', 'kim-em', 'thefundamentaltheor3m', 'trivial1711'] nobody
400-5199
1 year ago
483-16446
483 days ago
8-42257
8 days
22698 Kiolt
author:Kiolt
 feat: notation for whisker(Left/Right)Iso From Toric --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-category-theory toric 175/113 Mathlib/Algebra/Homology/Monoidal.lean,Mathlib/CategoryTheory/Bicategory/Adjunction/Basic.lean,Mathlib/CategoryTheory/Bicategory/Basic.lean,Mathlib/CategoryTheory/Bicategory/Coherence.lean,Mathlib/CategoryTheory/Bicategory/Extension.lean,Mathlib/CategoryTheory/Bicategory/Functor/Pseudofunctor.lean,Mathlib/CategoryTheory/Bicategory/NaturalTransformation/Strong.lean,Mathlib/CategoryTheory/Bicategory/SingleObj.lean,Mathlib/CategoryTheory/Closed/Functor.lean,Mathlib/CategoryTheory/Closed/Ideal.lean,Mathlib/CategoryTheory/Enriched/FunctorCategory.lean,Mathlib/CategoryTheory/GradedObject/Monoidal.lean,Mathlib/CategoryTheory/Monoidal/Braided/Basic.lean,Mathlib/CategoryTheory/Monoidal/Braided/Reflection.lean,Mathlib/CategoryTheory/Monoidal/Category.lean,Mathlib/CategoryTheory/Monoidal/Center.lean,Mathlib/CategoryTheory/Monoidal/Free/Coherence.lean,Mathlib/CategoryTheory/Monoidal/Preadditive.lean,Mathlib/CategoryTheory/Monoidal/Transport.lean,Mathlib/Tactic/CategoryTheory/BicategoricalComp.lean,Mathlib/Tactic/CategoryTheory/Bicategory/Datatypes.lean,Mathlib/Tactic/CategoryTheory/Bicategory/Normalize.lean,Mathlib/Tactic/CategoryTheory/Bicategory/PureCoherence.lean,Mathlib/Tactic/CategoryTheory/Monoidal/Datatypes.lean,Mathlib/Tactic/CategoryTheory/Monoidal/Normalize.lean,Mathlib/Tactic/CategoryTheory/Monoidal/PureCoherence.lean,Mathlib/Tactic/CategoryTheory/MonoidalComp.lean 27 21 ['Kiolt', 'YaelDillies', 'b-mehta', 'github-actions', 'leanprover-bot'] nobody
400-5028
1 year ago
436-24385
436 days ago
3-29299
3 days
20730 kuotsanhsu
author:kuotsanhsu
 feat(LinearAlgebra/Matrix/SchurTriangulation): prove Schur decomposition/triangulation `Matrix.schur_triangulation` shows that a matrix over an algebraically closed field is unitarily similar to an upper triangular matrix --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict awaiting-author t-algebra new-contributor
label:t-algebra$
 317/2 Mathlib.lean,Mathlib/LinearAlgebra/Matrix/Block.lean,Mathlib/LinearAlgebra/Matrix/SchurTriangulation.lean,Mathlib/Logic/Equiv/Basic.lean 4 14 ['eric-wieser', 'github-actions', 'kim-em', 'kuotsanhsu'] nobody
400-1331
1 year ago
479-78704
479 days ago
13-56244
13 days
19117 eric-wieser
author:eric-wieser
 feat: derivatives of matrix operations These are finally possible to state after #19108. However, a lot of bundled `ContinuousLinearMap`s are missing. --- - [x] depends on: #19108 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict WIP t-analysis 336/22 Mathlib.lean,Mathlib/Analysis/Calculus/Deriv/Matrix.lean,Mathlib/Analysis/Calculus/FDeriv/Basic.lean,Mathlib/Analysis/Calculus/FDeriv/Matrix.lean 4 3 ['github-actions', 'leanprover-community-bot-assistant', 'mathlib4-dependent-issues-bot'] nobody
398-23709
1 year ago
unknown
0-0
0 seconds
12605 FR-vdash-bot
author:FR-vdash-bot
 chore: attribute [induction_eliminator] Add attribute [induction_eliminator] to `AdjoinRoot.induction_on` `ENat.recTopCoe` `ENNReal.recTopCoe` `Finset.induction` `Magma.AssocQuotient.induction_on` `ManyOneDegree.ind_on` `Module.Ray.ind` (and add `Orientation.ind` for `Orientation`, an abbrev of it. I wish that we do not need to add it in the future.) `Multiset.induction` `MvPolynomial.induction_on` `OnePoint.rec` `Opposite.rec'` `Ordinal.limitRecOn` `PartENat.casesOn` `Polynomial.induction_on'` `QuotientAddGroup.induction_on'` (and add `AddCircle.induction_on` for `AddCircle`, an abbrev of it. I wish that we do not need to add it in the future.) `QuotientGroup.induction_on'` (doesn't actually work) `Real.Angle.induction_on` `SimplexCategory.rec` `Trunc.induction_on` --- - [x] depends on: #13476 - [x] depends on: #13264 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict awaiting-author 354/342 Mathlib/Algebra/BigOperators/Associated.lean,Mathlib/Algebra/BigOperators/Group/Finset.lean,Mathlib/Algebra/BigOperators/Group/Multiset.lean,Mathlib/Algebra/BigOperators/Ring.lean,Mathlib/Algebra/GCDMonoid/Finset.lean,Mathlib/Algebra/GCDMonoid/Multiset.lean,Mathlib/Algebra/Group/Subgroup/Finite.lean,Mathlib/Algebra/GroupWithZero/WithZero.lean,Mathlib/Algebra/Lie/Submodule.lean,Mathlib/Algebra/Lie/Weights/Basic.lean,Mathlib/Algebra/Module/BigOperators.lean,Mathlib/Algebra/MvPolynomial/Basic.lean,Mathlib/Algebra/MvPolynomial/Derivation.lean,Mathlib/Algebra/MvPolynomial/Variables.lean,Mathlib/Algebra/Order/ToIntervalMod.lean,Mathlib/Algebra/Polynomial/BigOperators.lean,Mathlib/Algebra/Polynomial/Degree/Lemmas.lean,Mathlib/Algebra/Polynomial/Derivative.lean,Mathlib/Algebra/Polynomial/Eval.lean,Mathlib/Algebra/Polynomial/Induction.lean,Mathlib/Algebra/Polynomial/Module/Basic.lean,Mathlib/Algebra/Polynomial/PartialFractions.lean,Mathlib/Algebra/Polynomial/Smeval.lean,Mathlib/Algebra/Tropical/BigOperators.lean,Mathlib/AlgebraicTopology/DoldKan/NCompGamma.lean,Mathlib/AlgebraicTopology/SimplexCategory.lean,Mathlib/AlgebraicTopology/SplitSimplicialObject.lean,Mathlib/Analysis/Analytic/Constructions.lean,Mathlib/Analysis/Asymptotics/Asymptotics.lean,Mathlib/Analysis/BoxIntegral/Basic.lean,Mathlib/Analysis/BoxIntegral/Partition/Additive.lean,Mathlib/Analysis/BoxIntegral/Partition/Split.lean,Mathlib/Analysis/Calculus/ContDiff/Basic.lean,Mathlib/Analysis/Calculus/ContDiff/Bounds.lean,Mathlib/Analysis/Calculus/Deriv/Polynomial.lean,Mathlib/Analysis/Convex/Combination.lean,Mathlib/Analysis/Convex/Exposed.lean,Mathlib/Analysis/Fourier/AddCircle.lean,Mathlib/Analysis/NormedSpace/Exponential.lean,Mathlib/Analysis/NormedSpace/Multilinear/Basic.lean,Mathlib/Analysis/SpecialFunctions/Complex/Arg.lean,Mathlib/Analysis/SpecialFunctions/Complex/Circle.lean,Mathlib/Analysis/SpecialFunctions/Log/Base.lean,Mathlib/Analysis/SpecialFunctions/PolynomialExp.lean,Mathlib/Analysis/SpecialFunctions/Pow/NNReal.lean,Mathlib/Analysis/SpecialFunctions/Trigonometric/Angle.lean,Mathlib/CategoryTheory/Filtered/Basic.lean,Mathlib/CategoryTheory/Subobject/Lattice.lean,Mathlib/Combinatorics/Additive/PluenneckeRuzsa.lean,Mathlib/Combinatorics/SetFamily/Compression/Down.lean,Mathlib/Combinatorics/SetFamily/FourFunctions.lean,Mathlib/Combinatorics/SetFamily/HarrisKleitman.lean,Mathlib/Computability/Reduce.lean,Mathlib/Data/DFinsupp/Basic.lean,Mathlib/Data/DFinsupp/WellFounded.lean,Mathlib/Data/Finset/Basic.lean,Mathlib/Data/Finset/Fold.lean,Mathlib/Data/Finset/Lattice.lean,Mathlib/Data/Finset/NAry.lean,Mathlib/Data/Fintype/Sum.lean,Mathlib/Data/Multiset/Antidiagonal.lean,Mathlib/Data/Multiset/Basic.lean,Mathlib/Data/Multiset/Bind.lean,Mathlib/Data/Multiset/Fold.lean,Mathlib/Data/Multiset/Lattice.lean,Mathlib/Data/Multiset/Pi.lean,Mathlib/Data/Multiset/Powerset.lean,Mathlib/Data/Multiset/Sections.lean,Mathlib/Data/Nat/Choose/Multinomial.lean,Mathlib/Data/Nat/PartENat.lean,Mathlib/Data/Quot.lean,Mathlib/Data/Set/Pointwise/BigOperators.lean,Mathlib/FieldTheory/IntermediateField.lean,Mathlib/FieldTheory/IsAlgClosed/AlgebraicClosure.lean,Mathlib/Geometry/Manifold/Algebra/Monoid.lean,Mathlib/Geometry/RingedSpace/Basic.lean,Mathlib/Geometry/RingedSpace/OpenImmersion.lean,Mathlib/Geometry/RingedSpace/PresheafedSpace/Gluing.lean,Mathlib/GroupTheory/Coset.lean,Mathlib/GroupTheory/NoncommPiCoprod.lean,Mathlib/GroupTheory/Perm/Cycle/Type.lean,Mathlib/LinearAlgebra/Determinant.lean,Mathlib/LinearAlgebra/Eigenspace/Basic.lean,Mathlib/LinearAlgebra/FiniteDimensional.lean,Mathlib/LinearAlgebra/LinearIndependent.lean,Mathlib/LinearAlgebra/Matrix/Determinant/Basic.lean,Mathlib/LinearAlgebra/Multilinear/Basic.lean,Mathlib/LinearAlgebra/Orientation.lean,Mathlib/LinearAlgebra/Projectivization/Basic.lean,Mathlib/LinearAlgebra/Ray.lean,Mathlib/LinearAlgebra/TensorProduct/Basic.lean,Mathlib/Logic/Hydra.lean,Mathlib/MeasureTheory/Function/ConditionalExpectation/Basic.lean,Mathlib/MeasureTheory/Function/L1Space.lean,Mathlib/MeasureTheory/Function/SimpleFunc.lean,Mathlib/MeasureTheory/Integral/Lebesgue.lean,Mathlib/MeasureTheory/Integral/Marginal.lean,Mathlib/MeasureTheory/Integral/MeanInequalities.lean,Mathlib/MeasureTheory/Integral/SetIntegral.lean,Mathlib/MeasureTheory/Measure/AddContent.lean 140 14 ['YaelDillies', 'astrainfinita', 'eric-wieser', 'github-actions', 'leanprover-community-mathlib4-bot', 'urkud'] nobody
398-18324
1 year ago
730-49895
730 days ago
4-46495
4 days
23859 urkud
author:urkud
 feat(Topology/../Order/Field): generalize to `Semifield` .. from a linear ordered field to a linear ordered semifield--- - [ ] depends on: #23857 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-topology 245/219 Mathlib/Algebra/Order/Group/Pointwise/Interval.lean,Mathlib/Analysis/BoxIntegral/Box/SubboxInduction.lean,Mathlib/Topology/Algebra/Order/Field.lean,Mathlib/Topology/Order/Basic.lean 4 3 ['github-actions', 'leanprover-community-bot-assistant', 'mathlib4-dependent-issues-bot'] nobody
395-44147
1 year ago
408-54788
408 days ago
0-265
4 minutes
24219 Paul-Lez
author:Paul-Lez
 feat: linear independence of the tensor product of two linearly independent families This is still WIP (the proofs are a little too long, and some lemmas need to be moved to other files!) From Toric --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) WIP t-algebra toric
label:t-algebra$
 193/0 Mathlib/LinearAlgebra/LinearIndependent/Tprod.lean 1 1 ['github-actions'] nobody
395-23579
1 year ago
397-38480
397 days ago
0-2221
37 minutes
23810 b-reinke
author:b-reinke
 chore(Order/Interval): generalize succ/pred lemmas to partial orders Many lemmas in `Mathlib/Order/Interval/Set/SuccPred.lean`and `Mathlib/Order/Interval/Finset/SuccPred.lean` also work for partial orders. They are generalized in this PR by introducing different sections for `PartialOrder` and `LinearOrder` assumptions in the respective files. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-order 231/89 Mathlib/Order/Interval/Finset/SuccPred.lean,Mathlib/Order/Interval/Set/SuccPred.lean 2 2 ['github-actions', 'leanprover-community-bot-assistant'] nobody
393-20922
1 year ago
393-20924
393 days ago
16-29623
16 days
24285 madvorak
author:madvorak
 chore(Algebra/*-{Category,Homology}): remove unnecessary universe variables Discussions: https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/Call.20for.20help.3A.20technical.2F.20organisational.20debt/with/513620128 https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/Algebra.20and.20.60Type*.60/with/513558902 https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/Task.2026.3A.20Replace.20Type.20u.20by.20Type*.20wherever.20possible/with/513592993 --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-algebra
label:t-algebra$
 542/916 Mathlib/Algebra/AddTorsor/Basic.lean,Mathlib/Algebra/Algebra/Defs.lean,Mathlib/Algebra/Algebra/Equiv.lean,Mathlib/Algebra/Algebra/Field.lean,Mathlib/Algebra/Algebra/Hom.lean,Mathlib/Algebra/Algebra/Operations.lean,Mathlib/Algebra/Algebra/Spectrum/Basic.lean,Mathlib/Algebra/Algebra/Subalgebra/Lattice.lean,Mathlib/Algebra/Algebra/Subalgebra/Tower.lean,Mathlib/Algebra/Algebra/Tower.lean,Mathlib/Algebra/Central/Basic.lean,Mathlib/Algebra/Central/Defs.lean,Mathlib/Algebra/Central/TensorProduct.lean,Mathlib/Algebra/CharP/Pi.lean,Mathlib/Algebra/CharP/Quotient.lean,Mathlib/Algebra/CharP/Subring.lean,Mathlib/Algebra/DirectSum/Algebra.lean,Mathlib/Algebra/DirectSum/Basic.lean,Mathlib/Algebra/DirectSum/Finsupp.lean,Mathlib/Algebra/DirectSum/Module.lean,Mathlib/Algebra/EuclideanDomain/Basic.lean,Mathlib/Algebra/EuclideanDomain/Defs.lean,Mathlib/Algebra/Field/Basic.lean,Mathlib/Algebra/Field/Defs.lean,Mathlib/Algebra/Field/IsField.lean,Mathlib/Algebra/Field/MinimalAxioms.lean,Mathlib/Algebra/Field/Subfield/Basic.lean,Mathlib/Algebra/Field/Subfield/Defs.lean,Mathlib/Algebra/FreeNonUnitalNonAssocAlgebra.lean,Mathlib/Algebra/Group/Conj.lean,Mathlib/Algebra/Group/Defs.lean,Mathlib/Algebra/Group/Equiv/Finite.lean,Mathlib/Algebra/Group/Ext.lean,Mathlib/Algebra/Group/Hom/End.lean,Mathlib/Algebra/Group/Hom/Instances.lean,Mathlib/Algebra/Group/Invertible/Basic.lean,Mathlib/Algebra/Group/Invertible/Defs.lean,Mathlib/Algebra/Group/Pi/Basic.lean,Mathlib/Algebra/Group/Pi/Lemmas.lean,Mathlib/Algebra/Group/TypeTags/Basic.lean,Mathlib/Algebra/Group/TypeTags/Finite.lean,Mathlib/Algebra/Group/TypeTags/Hom.lean,Mathlib/Algebra/Group/Units/Basic.lean,Mathlib/Algebra/Group/Units/Defs.lean,Mathlib/Algebra/Group/Units/Hom.lean,Mathlib/Algebra/Group/WithOne/Basic.lean,Mathlib/Algebra/Group/WithOne/Defs.lean,Mathlib/Algebra/GroupWithZero/Action/Pi.lean,Mathlib/Algebra/GroupWithZero/Defs.lean,Mathlib/Algebra/GroupWithZero/Invertible.lean,Mathlib/Algebra/GroupWithZero/NeZero.lean,Mathlib/Algebra/Lie/Abelian.lean,Mathlib/Algebra/Lie/Basic.lean,Mathlib/Algebra/Lie/CartanMatrix.lean,Mathlib/Algebra/Lie/CartanSubalgebra.lean,Mathlib/Algebra/Lie/Character.lean,Mathlib/Algebra/Lie/Classical.lean,Mathlib/Algebra/Lie/DirectSum.lean,Mathlib/Algebra/Lie/Free.lean,Mathlib/Algebra/Lie/Ideal.lean,Mathlib/Algebra/Lie/IdealOperations.lean,Mathlib/Algebra/Lie/Matrix.lean,Mathlib/Algebra/Lie/Nilpotent.lean,Mathlib/Algebra/Lie/NonUnitalNonAssocAlgebra.lean,Mathlib/Algebra/Lie/OfAssociative.lean,Mathlib/Algebra/Lie/Quotient.lean,Mathlib/Algebra/Lie/SkewAdjoint.lean,Mathlib/Algebra/Lie/Solvable.lean,Mathlib/Algebra/Lie/Subalgebra.lean,Mathlib/Algebra/Lie/Submodule.lean,Mathlib/Algebra/Lie/TensorProduct.lean,Mathlib/Algebra/Lie/UniversalEnveloping.lean,Mathlib/Algebra/Module/Basic.lean,Mathlib/Algebra/Module/CharacterModule.lean,Mathlib/Algebra/Module/DedekindDomain.lean,Mathlib/Algebra/Module/Defs.lean,Mathlib/Algebra/Module/End.lean,Mathlib/Algebra/Module/Equiv/Opposite.lean,Mathlib/Algebra/Module/Lattice.lean,Mathlib/Algebra/Module/LinearMap/Basic.lean,Mathlib/Algebra/Module/LinearMap/Defs.lean,Mathlib/Algebra/Module/LinearMap/End.lean,Mathlib/Algebra/Module/LocalizedModule/Basic.lean,Mathlib/Algebra/Module/MinimalAxioms.lean,Mathlib/Algebra/Module/NatInt.lean,Mathlib/Algebra/Module/Opposite.lean,Mathlib/Algebra/Module/Pi.lean,Mathlib/Algebra/Module/Presentation/Differentials.lean,Mathlib/Algebra/Module/Presentation/Tensor.lean,Mathlib/Algebra/Module/Rat.lean,Mathlib/Algebra/Module/RingHom.lean,Mathlib/Algebra/Module/Submodule/Basic.lean,Mathlib/Algebra/Module/Torsion.lean,Mathlib/Algebra/MonoidAlgebra/Basic.lean,Mathlib/Algebra/MonoidAlgebra/Defs.lean,Mathlib/Algebra/MonoidAlgebra/Support.lean,Mathlib/Algebra/MvPolynomial/Basic.lean,Mathlib/Algebra/MvPolynomial/CommRing.lean,Mathlib/Algebra/MvPolynomial/Degrees.lean,Mathlib/Algebra/MvPolynomial/Equiv.lean 182 22 ['erdOne', 'github-actions', 'leanprover-bot', 'leanprover-community-bot-assistant', 'madvorak', 'mattrobball'] nobody
393-9619
1 year ago
393-9620
393 days ago
2-11655
2 days
22583 imathwy
author:imathwy
 feat: affinespace homeomorphism There exists a homeomorphism (a continuous bijection with a continuous inverse) between an affine subspace s of a vector space V over a field 𝕜 and its direction s.direction , given a chosen point z ∈ s . --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict awaiting-author t-algebra
label:t-algebra$
 64/2 Mathlib/Analysis/Normed/Group/AddTorsor.lean,Mathlib/LinearAlgebra/AffineSpace/ContinuousAffineEquiv.lean,Mathlib/Topology/Algebra/ConstMulAction.lean,Mathlib/Topology/Algebra/MulAction.lean 4 6 ['JovanGerb', 'eric-wieser', 'github-actions', 'grunweg'] nobody
391-19794
1 year ago
443-31815
443 days ago
0-18122
5 hours
23593 erdOne
author:erdOne
 feat(AlgebraicGeometry): the tilde construction is functorial --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict awaiting-author t-algebraic-geometry 95/38 Mathlib/AlgebraicGeometry/Modules/Sheaf.lean,Mathlib/AlgebraicGeometry/Modules/Tilde.lean 2 4 ['chrisflav', 'github-actions', 'leanprover-community-bot-assistant'] nobody
389-36990
1 year ago
414-40004
414 days ago
0-71091
19 hours
21065 eric-wieser
author:eric-wieser
 feat: generalize `tangentConeAt.lim_zero` to TVS ... and then adjust the `variable`s down the rest of the file to make use of the generality. There are two key lemmas that this does not generalize, which would probably unlock the rest of the file: * `subset_tangentCone_prod_left` (and `_right`) * `zero_mem_tangentCone` --- - [ ] depends on: #20859 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict WIP t-analysis 55/28 Mathlib/Analysis/Calculus/TangentCone.lean 1 16 ['ADedecker', 'eric-wieser', 'github-actions', 'j-loreaux', 'leanprover-community-bot-assistant', 'mathlib4-dependent-issues-bot', 'urkud'] nobody
389-29394
1 year ago
456-65469
456 days ago
23-20072
23 days
22721 grunweg
author:grunweg
 chore(MeasureTheory/Function/LpSeminorm/Basic): generalise more results to enorm classes Done for the Carleson project. --- - depends on #22708 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict WIP carleson t-measure-probability 134/10 Mathlib/MeasureTheory/Function/LpSeminorm/Basic.lean 1 2 ['github-actions', 'leanprover-community-bot-assistant'] nobody
388-22062
1 year ago
440-8428
440 days ago
0-6
6 seconds
14731 adomani
author:adomani
 feat: the repeated typeclass assumption linter [#mathlib4 > recyclable variables @ 💬](https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/recyclable.20variables/near/451167963) also [#mathlib4 > Normed modules @ 💬](https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/Normed.20modules/near/512242167) --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict WIP t-linter large-import 178/0 Mathlib.lean,Mathlib/Tactic.lean,Mathlib/Tactic/Linter.lean,Mathlib/Tactic/Linter/DependentTypeclass.lean,MathlibTest/DependentTypeclass.lean 5 3 ['github-actions', 'leanprover-community-bot-assistant', 'mattrobball'] nobody
387-27301
1 year ago
677-26046
677 days ago
0-109
1 minute
24549 grunweg
author:grunweg
 feat: define embedded submanifolds, attempt 1 Not meant to be merged (I think a different design is better); opening this so I can find this more easily. --- - [ ] depends on: #23040 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict WIP t-differential-geometry blocked-by-other-PR 1445/2 Mathlib.lean,Mathlib/Analysis/NormedSpace/HahnBanach/Splits.lean,Mathlib/Geometry/Manifold/Diffeomorph.lean,Mathlib/Geometry/Manifold/EmbeddedSubmanifold.lean,Mathlib/Geometry/Manifold/IsImmersionEmbedding.lean,Mathlib/Geometry/Manifold/LocalDiffeomorph.lean,Mathlib/Geometry/Manifold/MSplits.lean,Mathlib/LinearAlgebra/Prod.lean 8 2 ['leanprover-community-bot-assistant', 'mathlib4-dependent-issues-bot'] nobody
384-52514
1 year ago
385-35437
385 days ago
0-1
1 second
22809 b-reinke
author:b-reinke
 feat: Category algebras and path algebras This PR defines the category algebra of a linear category and path algebras of quivers. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) WIP t-algebra t-category-theory new-contributor
label:t-algebra$
 218/0 Mathlib/Algebra/Ring/Assoc.lean,Mathlib/CategoryTheory/Linear/CategoryAlgebra.lean,Mathlib/Combinatorics/Quiver/PathAlgebra.lean,Mathlib/Data/DFinsupp/BigOperators.lean 4 2 ['b-reinke', 'github-actions'] nobody
384-52170
1 year ago
unknown
0-0
0 seconds
14675 adomani
author:adomani
 dev: the repeated variable linter --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict WIP t-linter 71/0 Mathlib/Tactic/Linter/Lint.lean 1 1 ['github-actions'] nobody
384-51847
1 year ago
679-38401
679 days ago
0-8
8 seconds
14330 Ruben-VandeVelde
author:Ruben-VandeVelde
 chore: split Mathlib.Algebra.Star.Basic --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict awaiting-author 446/331 Mathlib.lean,Mathlib/Algebra/Module/LinearMap/Star.lean,Mathlib/Algebra/Star/Basic.lean,Mathlib/Algebra/Star/BigOperators.lean,Mathlib/Algebra/Star/Defs.lean,Mathlib/Algebra/Star/Lemmas.lean,Mathlib/Algebra/Star/Order.lean,Mathlib/Algebra/Star/Pi.lean,Mathlib/Algebra/Star/Pointwise.lean,Mathlib/Algebra/Star/Rat.lean,Mathlib/Algebra/Star/Regular.lean,Mathlib/Algebra/Star/StarRingHom.lean,Mathlib/Analysis/NormedSpace/LinearIsometry.lean,Mathlib/Data/Complex/Basic.lean,scripts/noshake.json 15 3 ['github-actions', 'grunweg', 'j-loreaux'] nobody
384-51807
1 year ago
689-68152
689 days ago
0-45204
12 hours
8511 eric-wieser
author:eric-wieser
 refactor(MeasureTheory/Measure/Haar/Basic): partially generalize to the affine case Without a `Mul` version of `AddTorsor`, this generalization can only go so far. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict awaiting-author t-measure-probability 52/46 Mathlib/MeasureTheory/Measure/Haar/Basic.lean 1 0 [] nobody
384-51438
1 year ago
915-23118
915 days ago
0-7
7 seconds
7994 ericrbg
author:ericrbg
 chore: generalize `LieSubalgebra.mem_map_submodule` --- Not sure if we should rename to something like `mem_map_iff_mem_map_submodule` or not. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) please-adopt merge-conflict t-algebra
label:t-algebra$
 16/4 Mathlib/Algebra/Lie/SkewAdjoint.lean,Mathlib/Algebra/Lie/Subalgebra.lean 2 3 ['eric-wieser', 'ericrbg'] nobody
384-51426
1 year ago
937-46421
937 days ago
0-1
1 second
6317 eric-wieser
author:eric-wieser
 refactor(Data/Finsupp/Defs): make Finsupp.single defeq to Pi.single By adding a `DecidableEq ι` argument to `Finsupp.single`, we remove the reference to `Classical.decEq ι` in the definition, which in turn means that when coerced to a function it is now defeq to `Pi.single`. This also brings it in line with `DFinsupp.single`. This does not go as far as making `Finsupp.single` computable. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict WIP t-data 269/226 Mathlib/Algebra/BigOperators/Finsupp.lean,Mathlib/Data/Finsupp/AList.lean,Mathlib/Data/Finsupp/Basic.lean,Mathlib/Data/Finsupp/Defs.lean,Mathlib/Data/Finsupp/Fintype.lean,Mathlib/Data/Finsupp/Indicator.lean,Mathlib/Data/Finsupp/Multiset.lean,Mathlib/Data/Finsupp/Order.lean,Mathlib/Data/Finsupp/ToDFinsupp.lean,Mathlib/Data/Nat/Choose/Multinomial.lean,Mathlib/LinearAlgebra/Basis.lean,Mathlib/LinearAlgebra/Finsupp.lean 12 0 [] nobody
384-51420
1 year ago
unknown
0-0
0 seconds
11524 mcdoll
author:mcdoll
 refactor: Introduce type-class for SchwartzMap --- There are a lot of other refactors to do (`seminormAux` should have a nicer name and gobble up more theorems from `seminorm`), then one can prove `integrable` and friends with only `SchwartzMapClass`. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict WIP t-analysis 139/137 Mathlib/Analysis/Distribution/SchwartzSpace.lean,Mathlib/Analysis/Fourier/PoissonSummation.lean,Mathlib/Topology/ContinuousFunction/ZeroAtInfty.lean 3 0 [] nobody
384-51334
1 year ago
unknown
0-0
0 seconds
11003 thorimur
author:thorimur
 chore: migrate to `tfae` block tactic Migrates to the `tfae` block tactic syntax, eliminating uses of `tfae_have` and `tfae_finish`. --- - [ ] depends on: #11000 - [ ] depends on: #10991 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict WIP blocked-by-other-PR t-meta 1267/1081 Mathlib/Algebra/Exact.lean,Mathlib/Algebra/Homology/ShortComplex/ExactFunctor.lean,Mathlib/Algebra/Order/ToIntervalMod.lean,Mathlib/Analysis/BoxIntegral/Box/Basic.lean,Mathlib/Analysis/InnerProductSpace/Basic.lean,Mathlib/Analysis/LocallyConvex/WithSeminorms.lean,Mathlib/Analysis/NormedSpace/OperatorNorm/NormedSpace.lean,Mathlib/Analysis/RCLike/Basic.lean,Mathlib/Analysis/SpecificLimits/Normed.lean,Mathlib/CategoryTheory/Abelian/Exact.lean,Mathlib/CategoryTheory/Bicategory/Kan/Adjunction.lean,Mathlib/FieldTheory/Galois.lean,Mathlib/FieldTheory/KummerExtension.lean,Mathlib/GroupTheory/Nilpotent.lean,Mathlib/LinearAlgebra/Eigenspace/Zero.lean,Mathlib/MeasureTheory/Group/Action.lean,Mathlib/NumberTheory/FLT/Basic.lean,Mathlib/Order/CompactlyGenerated/Basic.lean,Mathlib/Order/Height.lean,Mathlib/Order/WellFoundedSet.lean,Mathlib/RingTheory/Bezout.lean,Mathlib/RingTheory/DiscreteValuationRing/TFAE.lean,Mathlib/RingTheory/Flat/EquationalCriterion.lean,Mathlib/RingTheory/Henselian.lean,Mathlib/RingTheory/LocalRing/RingHom/Basic.lean,Mathlib/RingTheory/Valuation/Basic.lean,Mathlib/RingTheory/Valuation/ValuationRing.lean,Mathlib/SetTheory/Ordinal/Topology.lean,Mathlib/Tactic/TFAE.lean,Mathlib/Topology/Algebra/Group/SubmonoidClosure.lean,Mathlib/Topology/Category/CompHaus/EffectiveEpi.lean,Mathlib/Topology/Category/Profinite/EffectiveEpi.lean,Mathlib/Topology/Category/Stonean/EffectiveEpi.lean,Mathlib/Topology/Inseparable.lean,Mathlib/Topology/LocallyClosed.lean,Mathlib/Topology/LocallyConstant/Basic.lean,Mathlib/Topology/NoetherianSpace.lean,Mathlib/Topology/Order/LeftRightNhds.lean,Mathlib/Topology/Separation.lean,Mathlib/Topology/UniformSpace/UniformConvergence.lean,scripts/noshake.json,test/tfae.lean 42 2 ['github-actions', 'leanprover-community-mathlib4-bot'] nobody
384-51330
1 year ago
613-12703
613 days ago
3-60883
3 days
22488 smmercuri
author:smmercuri
 fix: lower priority for `UniformSpace.Completion.instSMul` Following the introduction of the `WithVal` type synonym in #22055 the following instance takes a long time to synthesise in FLT, and times out in the default heartbeats ```lean import Mathlib namespace IsDedekindDomain.HeightOneSpectrum variable (A K : Type*) [CommRing A] [Field K] [Algebra A K] [IsFractionRing A K] [IsDedekindDomain A] (v : HeightOneSpectrum A) #synth SMul (v.adicCompletionIntegers K) (v.adicCompletion K) ``` The issue is that `UniformSpace.Completion.instSMul (v.adicCompletionIntegers K) (v.adicCompletion K)` now fires during the start of instance search (because we now have `UniformSpace (WithVal (v.valuation K))` whereas previously this would be `UniformSpace K`, which was not automatic), and this takes a long time to fail (leading to ~1400 entries in the trace). The first few lines of the new trace is ```lean [Meta.synthInstance] [5.512418] ✅️ SMul (↥(adicCompletionIntegers K v)) (adicCompletion K v) ▼ [] [0.000118] new goal SMul (↥(adicCompletionIntegers K v)) (adicCompletion K v) ▶ [] [0.000537] ✅️ apply UniformSpace.Completion.instSMul to SMul (↥(adicCompletionIntegers K v)) (adicCompletion K v) ▶ [] [0.004411] ✅️ apply @WithVal.instSMul to SMul (↥(adicCompletionIntegers K v)) (WithVal (valuation K v)) ▶ [] [0.000765] ❌️ apply @GradedMonoid.GradeZero.smul to SMul (↥(adicCompletionIntegers K v)) K ▶ [] [0.000378] ✅️ apply @Algebra.toSMul to SMul (↥(adicCompletionIntegers K v)) K ▶ ... [] 1339 more entries... ▶ ``` Lowering the priority of `UniformSpace.Completion.instSMul` fixes this particular issue, leading to a trace that matches that seen prior to the introduction of `WithVal`: ```lean [Meta.synthInstance] [0.016405] ✅️ SMul (↥(adicCompletionIntegers K v)) (adicCompletion K v) ▼ [] [0.000119] new goal SMul (↥(adicCompletionIntegers K v)) (adicCompletion K v) ▶ [] [0.000491] ❌️ apply @GradedMonoid.GradeZero.smul to SMul (↥(adicCompletionIntegers K v)) (adicCompletion K v) ▶ [] [0.000403] ✅️ apply @Algebra.toSMul to SMul (↥(adicCompletionIntegers K v)) (adicCompletion K v) ▶ [] [0.000134] ❌️ apply inst✝⁴ to Algebra (↥(adicCompletionIntegers K v)) (adicCompletion K v) ▶ [] [0.000093] ❌️ apply inst✝⁵ to Algebra (↥(adicCompletionIntegers K v)) (adicCompletion K v) ▶ [] [0.000077] ❌️ apply inst✝⁷ to Algebra (↥(adicCompletionIntegers K v)) (adicCompletion K v) ▶ [] [0.000082] ❌️ apply inst✝⁹ to Algebra (↥(adicCompletionIntegers K v)) (adicCompletion K v) ▶ [] [0.000075] ❌️ apply inst✝¹² to Algebra (↥(adicCompletionIntegers K v)) (adicCompletion K v) ▶ [] [0.000220] ❌️ apply Algebra.id to Algebra (↥(adicCompletionIntegers K v)) (adicCompletion K v) ▶ [] [0.001015] ✅️ apply @ValuationSubring.instAlgebraSubtypeMem to Algebra (↥(adicCompletionIntegers K v)) (adicCompletion K v) ▶ [resume] [0.000038] propagating Algebra (↥(adicCompletionIntegers K v)) (adicCompletion K v) to subgoal Algebra (↥(adicCompletionIntegers K v)) (adicCompletion K v) of SMul (↥(adicCompletionIntegers K v)) (adicCompletion K v) ▶ [check] [0.013358] ✅️ Algebra.toSMul [] result Algebra.toSMul ``` --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) awaiting-author t-topology FLT 1/1 Mathlib/Topology/Algebra/UniformMulAction.lean 1 10 ['github-actions', 'leanprover-bot', 'smmercuri', 'urkud'] nobody
383-34984
1 year ago
389-63536
389 days ago
55-70108
55 days
15654 TpmKranz
author:TpmKranz
 feat(Computability): language-preserving maps between NFA and RE Map REs to NFAs via Thompson's construction and NFAs to REs using GNFAs Last chunk of #12648 --- - [ ] depends on: #15651 - [ ] depends on: #15649 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) blocked-by-other-PR new-contributor t-computability merge-conflict awaiting-zulip 985/2 Mathlib.lean,Mathlib/Computability/GNFA.lean,Mathlib/Computability/Language.lean,Mathlib/Computability/NFA.lean,Mathlib/Computability/RegularExpressions.lean,Mathlib/Data/FinEnum/Option.lean,docs/references.bib 7 3 ['github-actions', 'leanprover-community-mathlib4-bot', 'meithecatte'] nobody
381-84849
1 year ago
651-21634
651 days ago
0-179
2 minutes
19315 quangvdao
author:quangvdao
 feat(Data/Finsupp/Fin): Add `Finsupp` operations on `Fin` tuple This PR adds more analogues of operations on `Fin` tuples to the `Finsupp` setting. Before, there were only `Finsupp.cons` and `Finsupp.tail`. Now there are also `Finsupp.snoc`, `Finsupp.insertNth`, `Finsupp.init`, and `Finsupp.removeNth`. These all come with supporting lemmas. I also removed the porting comment about `succAboveCases` in `Data/Fin/Basic`, and added a lemma about `succAbove` in `Data/Fin/Tuple/Basic`. --- - [x] depends on: #20361 - [x] depends on: #20771 - [x] depends on: #20770 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict awaiting-author t-data 193/16 Mathlib/Algebra/BigOperators/Fin.lean,Mathlib/Algebra/BigOperators/Finsupp.lean,Mathlib/Algebra/MvPolynomial/Equiv.lean,Mathlib/Data/Finsupp/Fin.lean,Mathlib/RingTheory/MvPolynomial/Homogeneous.lean,scripts/nolints_prime_decls.txt 6 44 ['YaelDillies', 'github-actions', 'j-loreaux', 'kbuzzard', 'mathlib4-dependent-issues-bot', 'quangvdao'] nobody
381-410
1 year ago
458-25433
458 days ago
43-80684
43 days
24155 eric-wieser
author:eric-wieser
 feat: add a "rw_proc" for fin vectors This seems a little nicer than an elaborator, since it means I can use the default elaboration rules to handle my first few variables. Ideally there would be something like ```lean rw_procQ {A : Type u} {B : A -> Type v} (a : A) (b : B a) : b = ?rhs => do /-- Context: u v : Level A : Q(Type u) B : Q($A -> Type v) a : Q($A) b : Q($B $a) rhs : Q($B $a) -- metavariable to assign |- MetaM Q($b = ?rhs) -/ ``` or ```lean rw_proc {A : Type u} {B : A -> Type v} (a : A) (b : B a) : b = ?rhs => do /-- Context: u v : Level A B a b : Expr rhs : MVarId |- MetaM Expr -/ ``` which would generate the code I wrote here --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) awaiting-author RFC t-data t-meta 27/2 Mathlib/Data/Fin/Tuple/Reflection.lean 1 2 ['github-actions', 'urkud'] nobody
378-82690
1 year ago
378-82690
378 days ago
20-83091
20 days
21276 GabinKolly
author:GabinKolly
 feat(ModelTheory/Substructures): define equivalences between equal substructures Define first-order equivalences between equal substructures, and prove related properties. --- This is some preparatory work for #18876 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) awaiting-author t-logic 62/0 Mathlib/ModelTheory/Substructures.lean 1 19 ['GabinKolly', 'YaelDillies', 'fpvandoorn', 'github-actions', 'grunweg'] nobody
378-18484
1 year ago
378-18484
378 days ago
46-55730
46 days
24008 meithecatte
author:meithecatte
 chore(EpsilonNFA): replace manual lemmas with @[simps] --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-computability awaiting-author new-contributor 2/24 Mathlib/Computability/EpsilonNFA.lean 1 2 ['YaelDillies', 'github-actions', 'urkud'] nobody
376-44028
1 year ago
376-44028
376 days ago
27-52316
27 days
24642 grunweg
author:grunweg
 WIP-feat: add layercake formula for ENNReal-valued functions Not much to see here yet; some significant amount of work remains. --- - [ ] depends on: #24643 - [ ] depends on: #24640 (based on that PR for simplicity) [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict WIP carleson t-analysis 189/24 Mathlib/Analysis/SpecialFunctions/Pow/Integral.lean,Mathlib/MeasureTheory/Function/LpSeminorm/Basic.lean,Mathlib/MeasureTheory/Function/LpSpace/Basic.lean,Mathlib/MeasureTheory/Integral/Layercake.lean 4 3 ['github-actions', 'leanprover-community-bot-assistant', 'mathlib4-dependent-issues-bot'] nobody
375-20409
1 year ago
unknown
0-0
0 seconds
21712 grunweg
author:grunweg
 chore: generalise more lemmas to `ContinuousENorm` --- - [x] depends on: #21781 (minor drive-by clean-up) - [x] depends on: #21670 - [x] depends on: #22708 (extracted from this) - some parts depend on #21433 (or better: #22175); when the dependent PR has landed, I will re-assess whether to split these into a separate PR [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict carleson awaiting-CI t-measure-probability 76/31 Mathlib/Analysis/Normed/MulAction.lean,Mathlib/MeasureTheory/Function/LpSeminorm/Basic.lean,Mathlib/MeasureTheory/Function/LpSpace/Basic.lean,Mathlib/MeasureTheory/Function/LpSpace/ContinuousFunctions.lean 4 5 ['github-actions', 'grunweg', 'leanprover-community-bot-assistant', 'mathlib4-dependent-issues-bot'] nobody
374-42093
1 year ago
unknown
0-0
0 seconds
21375 grunweg
author:grunweg
 WIP: generalise lemmas to ENorm This work is part of (and a necessary pre-requisite for) the Carleson project. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) WIP awaiting-CI t-measure-probability carleson merge-conflict 471/221 Mathlib/Analysis/NormedSpace/IndicatorFunction.lean,Mathlib/MeasureTheory/Function/L2Space.lean,Mathlib/MeasureTheory/Function/LocallyIntegrable.lean,Mathlib/MeasureTheory/Function/LpOrder.lean,Mathlib/MeasureTheory/Function/LpSeminorm/Basic.lean,Mathlib/MeasureTheory/Function/LpSeminorm/ChebyshevMarkov.lean,Mathlib/MeasureTheory/Function/LpSeminorm/CompareExp.lean,Mathlib/MeasureTheory/Function/LpSeminorm/TriangleInequality.lean,Mathlib/MeasureTheory/Function/LpSeminorm/Trim.lean,Mathlib/MeasureTheory/Function/LpSpace.lean,Mathlib/MeasureTheory/Function/SimpleFuncDenseLp.lean,Mathlib/MeasureTheory/Function/UniformIntegrable.lean,Mathlib/Probability/Independence/Integrable.lean 13 2 ['fpvandoorn', 'grunweg'] nobody
374-36468
1 year ago
unknown
0-0
0 seconds
24618 b-mehta
author:b-mehta
 feat(Analysis): add Schur inequality and variants Add Schur inequality and some of its common variants. TODO: - [x] add reference to source: https://www.cip.ifi.lmu.de/~grinberg/VornicuS.pdf - [ ] add other generalisations - [ ] move some of the lemmas elsewhere --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) WIP t-analysis 145/0 Mathlib/Analysis/Convex/Schur.lean 1 16 ['b-mehta', 'eric-wieser', 'github-actions'] nobody
373-31561
1 year ago
382-11563
382 days ago
0-2
2 seconds
15115 kkytola
author:kkytola
 feat: Generalize assumptions in liminf and limsup results in ENNReals In a [review comment](https://github.com/leanprover-community/mathlib4/pull/13938#discussion_r1649744441) it was pointed out that results about liminf and limsup in ENNReal hold under milder assumptions. This PR does the generalization. --- This PR is split off from #13938, where the review comment was made. The changes needed for the suggested generalization were of different kind than the simple PR's content, justifying a separate PR. - [x] depends on: #13938 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-order merge-conflict help-wanted awaiting-author t-topology 215/27 Mathlib/MeasureTheory/Measure/Portmanteau.lean,Mathlib/Order/LiminfLimsup.lean,Mathlib/Topology/Instances/ENNReal.lean 3 8 ['Ruben-VandeVelde', 'github-actions', 'grunweg', 'j-loreaux', 'kkytola', 'leanprover-community-mathlib4-bot'] nobody
372-32803
1 year ago
618-25621
618 days ago
21-25493
21 days
24957 eric-wieser
author:eric-wieser
 feat: use ` binderNameHint` in sum_congr Zulip thread: [#new members > Choosing dummy variable inside summation @ 💬](https://leanprover.zulipchat.com/#narrow/channel/113489-new-members/topic/Choosing.20dummy.20variable.20inside.20summation/near/518492888) Co-authored-by: Joachim Breitner --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra merge-conflict
label:t-algebra$
 23/16 Mathlib/Algebra/BigOperators/Expect.lean,Mathlib/Algebra/BigOperators/Group/Finset/Basic.lean,Mathlib/Analysis/BoxIntegral/Partition/Basic.lean,Mathlib/Data/Finset/Fold.lean,Mathlib/Data/Finset/Lattice/Fold.lean,Mathlib/Data/List/OfFn.lean,Mathlib/Data/Multiset/Count.lean,Mathlib/Data/Multiset/Filter.lean,Mathlib/Data/Multiset/MapFold.lean,Mathlib/Data/Option/Basic.lean,Mathlib/Data/Set/Image.lean,Mathlib/Data/Sym/Basic.lean,Mathlib/Data/Sym/Sym2.lean 13 2 ['github-actions', 'mathlib-merge-conflicts'] nobody
371-30705
1 year ago
371-31807
371 days ago
0-424
7 minutes
23349 BGuillemet
author:BGuillemet
 feat: add LocallyLipschitzOn.lipschitzOnWith_of_isCompact and two small lemmas about Lipschitz functions Main feat (in Mathlib/Topology/EMetricSpace/Basic.lean): if a function `f` from an extended pseudometric space to a pseudometric space is locally Lipschitz on a compact subset `s`, then `f` is Lipschitz on `s`. The theorem is true only when the codomain of `f` is a pseudometric space, so it needs imports from Mathlib/Topology/MetricSpace. Other small feat (in Mathlib/Analysis/Calculus/ContDiff/RCLike.lean): a function that is continuously differentiable on an open subset is locally Lipschitz on this subset. --- - [ ] depends on: #22890 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-topology large-import new-contributor 59/4 Mathlib/Analysis/Calculus/ContDiff/RCLike.lean,Mathlib/Topology/EMetricSpace/Lipschitz.lean 2 4 ['github-actions', 'leanprover-community-bot-assistant', 'mathlib4-dependent-issues-bot'] PatrickMassot
assignee:PatrickMassot
360-16369
11 months ago
360-16371
360 days ago
35-30364
35 days
12438 jjaassoonn
author:jjaassoonn
 feat: some APIs for flat modules Need horseshoe lemma --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict WIP t-category-theory 1674/3 Mathlib.lean,Mathlib/Algebra/Category/ModuleCat/Monoidal/Basic.lean,Mathlib/Algebra/Category/ModuleCat/Monoidal/Symmetric.lean,Mathlib/Algebra/Exact.lean,Mathlib/CategoryTheory/Abelian/Basic.lean,Mathlib/CategoryTheory/Abelian/DiagramLemmas/Horseshoe.lean,Mathlib/CategoryTheory/Abelian/LeftDerived.lean,Mathlib/RingTheory/Flat/Basic.lean 8 21 ['erdOne', 'github-actions', 'jjaassoonn', 'joelriou'] nobody
355-28995
11 months ago
756-78266
756 days ago
0-20
20 seconds
25473 adomani
author:adomani
 feat(CI): check that Mathlib files have lean or md extension Twice recently there have been files with an "intended" `.lean` extension in `Mathlib/`: * #24942, ending in `;lean`; * #25457, ending in `.Lean`. `mk_all` does not add these files to `Mathlib.lean`, since they do not end in `.lean` and this later causes problems. This CI step checks that all files in `Mathlib/` end with `.lean` or `.md`. See #25474 for a test where the new step [correctly fails](https://github.com/leanprover-community/mathlib4/actions/runs/15464097783/job/43532018379?pr=25474). --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) CI delegated 10/0 .github/workflows/lint_and_suggest_pr.yml 1 10 ['adomani', 'bryangingechen', 'github-actions', 'grunweg', 'mathlib-bors'] nobody
351-32936
11 months ago
351-33827
351 days ago
0-10326
2 hours
16020 adomani
author:adomani
 feat: compare PR `olean`s size with `master` Adds two CI steps: * `print the sizes of the oleans` that prints the sizes of all the folders containing `Mathlib` `.olean`s; * `compare oleans` that compares the sizes of the previous step with the corresponding sizes on `master`. In the test runs, the two steps have taken at most 3 seconds combined (the first is virtually instantaneous, the second one depends on `curl` to find a job id and on `gh` to retrieve the logs of a previous CI run -- everything else appears to be negligible). This hopefully helps finding out if some PR is bloating up the `.olean`s. See [this Zulip discussion](https://leanprover.zulipchat.com/#narrow/stream/287929-mathlib4/topic/Error.3A.20No.20space.20left.20on.20device/near/463792355) for a PR of mine that prompted this check. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict CI 120/0 .github/build.in.yml,.github/workflows/bors.yml,.github/workflows/build.yml,.github/workflows/build_fork.yml,scripts/olean_comparison.sh 5 50 ['Vtec234', 'YaelDillies', 'adomani', 'bryangingechen', 'github-actions', 'grunweg', 'kim-em', 'leanprover-community-bot-assistant', 'mattrobball'] nobody
350-66376
11 months ago
548-27398
548 days ago
87-65841
87 days
16062 adomani
author:adomani
 Test/ci olean size Tests for oleans --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict WIP awaiting-author CI 114/0 .github/build.in.yml,.github/workflows/bors.yml,.github/workflows/build.yml,.github/workflows/build_fork.yml,scripts/olean_comparison.sh 5 4 ['Parcly-Taxel', 'adomani', 'github-actions', 'leanprover-community-bot-assistant'] nobody
350-66376
11 months ago
638-40956
638 days ago
0-16
16 seconds
12799 jstoobysmith
author:jstoobysmith
 feat(LinearAlgebra/UnitaryGroup): Add properties of Special Unitary Group Add properties of the special unitary group, mirroring the properties of found in Algebra/Star/Unitary.lean. In particular, I add an instance of `specialUnitaryGroup` as a `Group`, `Star`, `InvolutiveStar`, and `StarMul`. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) please-adopt t-algebra new-contributor merge-conflict awaiting-author
label:t-algebra$
 78/0 Mathlib/LinearAlgebra/UnitaryGroup.lean 1 8 ['chrisflav', 'jcommelin', 'leanprover-community-bot-assistant'] nobody
349-74722
11 months ago
733-15975
733 days ago
9-22045
9 days
23709 plp127
author:plp127
 feat: `Nat.findFrom` This PR adds `Nat.findFrom`, which is like `Nat.find`, but starting from an arbitrary `k` instead of `0`. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-data 190/47 Mathlib/Data/Nat/Find.lean 1 2 ['github-actions', 'leanprover-community-bot-assistant'] nobody
349-40011
11 months ago
412-5784
412 days ago
0-943
15 minutes
25340 dupuisf
author:dupuisf
 chore(Analysis/Convex): move files pertaining to convex/concave functions to their own folder This PR creates a new folder under `Analysis/Convex` called `Analysis/Convex/Function`, which includes files that are mostly or entirely about convex/concave functions (as opposed to convex sets). --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-convex-geometry 4264/4155 Mathlib.lean,Mathlib/Analysis/Convex/Continuous.lean,Mathlib/Analysis/Convex/Deriv.lean,Mathlib/Analysis/Convex/Exposed.lean,Mathlib/Analysis/Convex/Extrema.lean,Mathlib/Analysis/Convex/Function.lean,Mathlib/Analysis/Convex/Function/Basic.lean,Mathlib/Analysis/Convex/Function/Continuous.lean,Mathlib/Analysis/Convex/Function/Deriv.lean,Mathlib/Analysis/Convex/Function/Extrema.lean,Mathlib/Analysis/Convex/Function/Integral.lean,Mathlib/Analysis/Convex/Function/Jensen.lean,Mathlib/Analysis/Convex/Function/Mul.lean,Mathlib/Analysis/Convex/Function/Piecewise.lean,Mathlib/Analysis/Convex/Function/Quasiconvex.lean,Mathlib/Analysis/Convex/Function/Slope.lean,Mathlib/Analysis/Convex/Function/Strong.lean,Mathlib/Analysis/Convex/Integral.lean,Mathlib/Analysis/Convex/Jensen.lean,Mathlib/Analysis/Convex/Mul.lean,Mathlib/Analysis/Convex/Piecewise.lean,Mathlib/Analysis/Convex/Quasiconvex.lean,Mathlib/Analysis/Convex/Slope.lean,Mathlib/Analysis/Convex/SpecificFunctions/Basic.lean,Mathlib/Analysis/Convex/SpecificFunctions/Deriv.lean,Mathlib/Analysis/Convex/Strong.lean,Mathlib/Analysis/MeanInequalities.lean,Mathlib/Analysis/MeanInequalitiesPow.lean,Mathlib/Analysis/Normed/Module/Convex.lean,Mathlib/Analysis/Seminorm.lean,Mathlib/Analysis/SpecialFunctions/Log/NegMulLog.lean,Mathlib/Analysis/SpecialFunctions/Pochhammer.lean,Mathlib/MeasureTheory/Measure/Decomposition/IntegralRNDeriv.lean,Mathlib/NumberTheory/Harmonic/GammaDeriv.lean 34 2 ['github-actions', 'leanprover-community-bot-assistant'] nobody
349-39196
11 months ago
349-39198
349 days ago
6-38644
6 days
21734 adomani
author:adomani
 fix(PR summary): checkout GITHUB_SHA This should make the version of the script that is used on PRs more stable. Suggested by Eric Wieser on [Zulip](https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/messageFile.2Emd/near/498941855). --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict WIP awaiting-author CI 2/1 .github/workflows/PR_summary.yml 1 2 ['github-actions', 'leanprover-community-bot-assistant'] nobody
348-55863
11 months ago
465-5742
465 days ago
0-6023
1 hour
20334 miguelmarco
author:miguelmarco
 feat: allow polyrith to use a local Singular/Sage install Try to call a local install of Singular (either standalone or inside Sage) to find the witness for polyrith before trying to call the online sage cell server. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict awaiting-author new-contributor t-meta 171/48 Mathlib/Tactic/Polyrith.lean,scripts/polyrith_sage.py 2 16 ['eric-wieser', 'github-actions', 'hanwenzhu', 'kim-em', 'miguelmarco', 'mkoeppe'] nobody
342-67275
11 months ago
481-18856
481 days ago
27-61498
27 days
23953 b-reinke
author:b-reinke
 feat(Data/Matroid/Tutte): define the Tutte polynomial of a matroid This PR defines the Tutte polynomial of a matroid and shows basic properties. - [x] depends on: #23926 - [ ] depends on #24336 - [ ] depends on: #23951 --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict WIP t-data 111/0 Mathlib/Algebra/BigOperators/Finprod.lean,Mathlib/Data/Matroid/Tutte/Basic.lean,Mathlib/Data/Set/Image.lean 3 7 ['apnelson1', 'b-reinke', 'github-actions', 'leanprover-community-bot-assistant', 'mathlib4-dependent-issues-bot'] nobody
340-22355
11 months ago
unknown
0-0
0 seconds
18771 joelriou
author:joelriou
 feat(LinearAlgebra/ExteriorPower): exterior powers of free modules are free Co-authored-by: sophie.morel@ens-lyon.fr --- - [ ] depends on: #18662 - [x] depends on: #18534 - [x] depends on: #18651 - [x] depends on: #18590 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict WIP t-algebra blocked-by-other-PR
label:t-algebra$
 1185/160 Mathlib.lean,Mathlib/Analysis/NormedSpace/Multilinear/Curry.lean,Mathlib/Analysis/NormedSpace/PiTensorProduct/ProjectiveSeminorm.lean,Mathlib/Data/Sum/Basic.lean,Mathlib/LinearAlgebra/ExteriorPower/Basic.lean,Mathlib/LinearAlgebra/ExteriorPower/Basis.lean,Mathlib/LinearAlgebra/ExteriorPower/Generators.lean,Mathlib/LinearAlgebra/ExteriorPower/Pairing.lean,Mathlib/LinearAlgebra/Multilinear/Basic.lean,Mathlib/LinearAlgebra/Multilinear/TensorProduct.lean,Mathlib/LinearAlgebra/PiTensorProduct/Basic.lean,Mathlib/LinearAlgebra/PiTensorProduct/Finite.lean,Mathlib/LinearAlgebra/PiTensorProduct/Generators.lean,Mathlib/LinearAlgebra/Span.lean,Mathlib/LinearAlgebra/TensorAlgebra/ToTensorPower.lean,Mathlib/LinearAlgebra/TensorPower/Basic.lean,Mathlib/LinearAlgebra/TensorPower/Pairing.lean,Mathlib/Logic/Function/Basic.lean,Mathlib/RingTheory/PiTensorProduct.lean 19 3 ['alreadydone', 'github-actions', 'mathlib4-dependent-issues-bot'] nobody
337-45492
11 months ago
unknown
0-0
0 seconds
18441 ADedecker
author:ADedecker
 refactor(AdicTopology): use new API for algebraic filter bases, and factor some code --- - [x] depends on: #18437 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-topology t-algebra
label:t-algebra$
 847/159 Mathlib.lean,Mathlib/Topology/Algebra/FilterBasis.lean,Mathlib/Topology/Algebra/FilterBasisNew.lean,Mathlib/Topology/Algebra/Nonarchimedean/AdicTopology.lean,Mathlib/Topology/Algebra/Nonarchimedean/Bases.lean,Mathlib/Topology/Algebra/Nonarchimedean/BasesNew.lean 6 3 ['ADedecker', 'github-actions', 'mathlib4-dependent-issues-bot'] nobody
337-30937
11 months ago
569-28836
569 days ago
0-679
11 minutes
18439 ADedecker
author:ADedecker
 refactor: use new algebraic filter bases API in `FiniteAdeleRing` --- - [x] depends on: #18437 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-topology t-algebra
label:t-algebra$
 699/21 Mathlib.lean,Mathlib/RingTheory/DedekindDomain/FiniteAdeleRing.lean,Mathlib/Topology/Algebra/FilterBasis.lean,Mathlib/Topology/Algebra/FilterBasisNew.lean,Mathlib/Topology/Algebra/Nonarchimedean/Bases.lean,Mathlib/Topology/Algebra/Nonarchimedean/BasesNew.lean 6 2 ['github-actions', 'mathlib4-dependent-issues-bot'] nobody
337-30935
11 months ago
569-30479
569 days ago
0-619
10 minutes
18438 ADedecker
author:ADedecker
 refactor: adapt `KrullTopology` to the new algebraic filter bases API --- - [x] depends on: #18437 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-topology t-algebra
label:t-algebra$
 771/168 Mathlib.lean,Mathlib/FieldTheory/KrullTopology.lean,Mathlib/Topology/Algebra/FilterBasis.lean,Mathlib/Topology/Algebra/FilterBasisNew.lean,Mathlib/Topology/Algebra/Nonarchimedean/Bases.lean,Mathlib/Topology/Algebra/Nonarchimedean/BasesNew.lean 6 5 ['ADedecker', 'AntoineChambert-Loir', 'github-actions', 'mathlib4-dependent-issues-bot'] nobody
337-30934
11 months ago
569-31121
569 days ago
0-638
10 minutes
13964 pechersky
author:pechersky
 feat(Data/DigitExpansion): begin defining variant of reals without rationals Based on a de Bruijn 1976 paper. This file is just the basic definition of a digit expansion. Will be followed up with further constructions. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-data 518/0 Mathlib.lean,Mathlib/Data/DigitExpansion/Defs.lean,docs/references.bib 3 11 ['eric-wieser', 'github-actions', 'kim-em', 'pechersky'] dupuisf
assignee:dupuisf
334-13225
11 months ago
572-39441
572 days ago
129-57999
129 days
18662 joelriou
author:joelriou
 feat(LinearAlgebra/ExteriorPower): generators of the exterior powers --- - [x] depends on: #18534 - [x] depends on: #18590 - [ ] depends on: #26464 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict WIP t-algebra blocked-by-other-PR
label:t-algebra$
 818/158 Mathlib.lean,Mathlib/Analysis/NormedSpace/Multilinear/Curry.lean,Mathlib/Analysis/NormedSpace/PiTensorProduct/ProjectiveSeminorm.lean,Mathlib/Data/Sum/Basic.lean,Mathlib/LinearAlgebra/ExteriorPower/Basic.lean,Mathlib/LinearAlgebra/ExteriorPower/Generators.lean,Mathlib/LinearAlgebra/Multilinear/Basic.lean,Mathlib/LinearAlgebra/Multilinear/TensorProduct.lean,Mathlib/LinearAlgebra/PiTensorProduct/Basic.lean,Mathlib/LinearAlgebra/PiTensorProduct/Finite.lean,Mathlib/LinearAlgebra/PiTensorProduct/Generators.lean,Mathlib/LinearAlgebra/Span.lean,Mathlib/LinearAlgebra/TensorPower.lean,Mathlib/Logic/Function/Basic.lean,Mathlib/RingTheory/PiTensorProduct.lean 15 2 ['github-actions', 'mathlib4-dependent-issues-bot'] nobody
329-51947
10 months ago
unknown
0-0
0 seconds
18735 joelriou
author:joelriou
 feat(Algebra/Module): presentation of the exterior power Given a presentation of a `R`-module `M`, we obtain a presentation of `⋀[R]^n M`. --- (Still one sorry left.) - [ ] depends on: #18527 - [ ] depends on: #18432 - [ ] depends on: #26464 - [ ] depends on: #18534 - [ ] depends on: #18662 - [x] depends on: #18590 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict WIP t-algebra blocked-by-other-PR
label:t-algebra$
 1856/157 Mathlib.lean,Mathlib/Algebra/Category/ModuleCat/ExteriorPower.lean,Mathlib/Algebra/Module/Presentation/Basic.lean,Mathlib/Algebra/Module/Presentation/ExteriorPower.lean,Mathlib/Algebra/Module/Presentation/PiTensor.lean,Mathlib/Algebra/Module/Presentation/Tensor.lean,Mathlib/Analysis/NormedSpace/Multilinear/Curry.lean,Mathlib/Analysis/NormedSpace/PiTensorProduct/ProjectiveSeminorm.lean,Mathlib/Data/Sum/Basic.lean,Mathlib/LinearAlgebra/ExteriorPower/Basic.lean,Mathlib/LinearAlgebra/ExteriorPower/Generators.lean,Mathlib/LinearAlgebra/Multilinear/Basic.lean,Mathlib/LinearAlgebra/Multilinear/TensorProduct.lean,Mathlib/LinearAlgebra/PiTensorProduct/Basic.lean,Mathlib/LinearAlgebra/PiTensorProduct/Finite.lean,Mathlib/LinearAlgebra/PiTensorProduct/Generators.lean,Mathlib/LinearAlgebra/Span.lean,Mathlib/LinearAlgebra/TensorPower.lean,Mathlib/Logic/Function/Basic.lean,Mathlib/RingTheory/PiTensorProduct.lean 20 2 ['github-actions', 'mathlib4-dependent-issues-bot'] nobody
329-47921
10 months ago
unknown
0-0
0 seconds
17458 urkud
author:urkud
 refactor(Algebra/Group): make `IsUnit` a typeclass Also change some lemmas to assume `[IsUnit _]` instead of `[Invertible _]`. Motivated by potential non-defeq diamonds in #14986, see also [Zulip](https://leanprover.zulipchat.com/#narrow/stream/116395-maths/topic/Invertible.20and.20data) I no longer plan to merge this PR, but I'm going to cherry-pick some changes to a new PR before closing this one. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-algebra awaiting-zulip
label:t-algebra$
 82/72 Mathlib/Algebra/CharP/Invertible.lean,Mathlib/Algebra/Group/Invertible/Basic.lean,Mathlib/Algebra/Group/Units/Defs.lean,Mathlib/Algebra/GroupWithZero/Invertible.lean,Mathlib/Algebra/GroupWithZero/Units/Basic.lean,Mathlib/Algebra/Polynomial/Degree/Units.lean,Mathlib/Algebra/Polynomial/Splits.lean,Mathlib/Analysis/Convex/Segment.lean,Mathlib/Analysis/Normed/Affine/Isometry.lean,Mathlib/Analysis/Normed/Ring/Units.lean,Mathlib/CategoryTheory/Linear/Basic.lean,Mathlib/FieldTheory/Finite/Basic.lean,Mathlib/FieldTheory/Separable.lean,Mathlib/FieldTheory/SeparableDegree.lean,Mathlib/GroupTheory/Submonoid/Inverses.lean,Mathlib/LinearAlgebra/AffineSpace/AffineEquiv.lean,Mathlib/LinearAlgebra/AffineSpace/Combination.lean,Mathlib/LinearAlgebra/CliffordAlgebra/Contraction.lean,Mathlib/LinearAlgebra/CliffordAlgebra/Inversion.lean,Mathlib/LinearAlgebra/CliffordAlgebra/SpinGroup.lean,Mathlib/LinearAlgebra/Eigenspace/Minpoly.lean,Mathlib/NumberTheory/MulChar/Basic.lean,Mathlib/RingTheory/Localization/NumDen.lean,Mathlib/RingTheory/Polynomial/Content.lean,Mathlib/RingTheory/Polynomial/GaussLemma.lean,Mathlib/RingTheory/Valuation/Basic.lean 26 12 ['MichaelStollBayreuth', 'acmepjz', 'eric-wieser', 'github-actions', 'leanprover-bot', 'leanprover-community-bot-assistant', 'urkud'] nobody
321-65198
10 months ago
593-12841
593 days ago
0-66650
18 hours
22928 javra
author:javra
 feat(CategoryTheory): infrastructure for inclusion morphisms into products in categories with 0-morphisms --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-category-theory 52/14 Mathlib/CategoryTheory/Limits/Shapes/BinaryBiproducts.lean,Mathlib/CategoryTheory/Limits/Shapes/Biproducts.lean,Mathlib/CategoryTheory/Limits/Shapes/ZeroMorphisms.lean 3 2 ['github-actions', 'leanprover-community-bot-assistant'] nobody
321-64692
10 months ago
321-64693
321 days ago
112-51866
112 days
24710 chrisflav
author:chrisflav
 chore(Data/Set): `tsum` version of `Set.encard_iUnion_of_finite` for non-finite types As requested here: https://github.com/leanprover-community/mathlib4/pull/23849#discussion_r2081070200 --- - [ ] depends on: #23849 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-data 163/0 Mathlib.lean,Mathlib/Algebra/BigOperators/Finprod.lean,Mathlib/Data/Set/Card/Arithmetic.lean,Mathlib/Data/Set/Card/InfiniteArithmetic.lean,Mathlib/Data/Set/Finite/Lattice.lean,Mathlib/Topology/Algebra/InfiniteSum/Order.lean,Mathlib/Topology/Instances/ENat/Lemmas.lean 7 3 ['github-actions', 'leanprover-community-bot-assistant', 'mathlib4-dependent-issues-bot'] nobody
321-64286
10 months ago
321-64286
321 days ago
1-80465
1 day
24823 eric-wieser
author:eric-wieser
 refactor: add `hom` lemmas for the `MonoidalCategory` structure on `ModuleCat` --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-algebra
label:t-algebra$
 148/164 Mathlib/Algebra/Category/FGModuleCat/Basic.lean,Mathlib/Algebra/Category/ModuleCat/Adjunctions.lean,Mathlib/Algebra/Category/ModuleCat/Monoidal/Basic.lean,Mathlib/Algebra/Category/ModuleCat/Monoidal/Closed.lean,Mathlib/Algebra/Category/ModuleCat/Monoidal/Symmetric.lean,Mathlib/Algebra/Category/ModuleCat/Presheaf/Free.lean,Mathlib/Algebra/Category/ModuleCat/Presheaf/Generator.lean,Mathlib/Algebra/Category/ModuleCat/Presheaf/Monoidal.lean,Mathlib/CategoryTheory/Monoidal/Internal/Module.lean,Mathlib/RepresentationTheory/Coinvariants.lean,Mathlib/RepresentationTheory/Rep.lean 11 21 ['101damnations', 'YaelDillies', 'eric-wieser', 'github-actions', 'joelriou', 'kbuzzard', 'leanprover-community-bot-assistant'] 101damnations
assignee:101damnations
321-64285
10 months ago
321-64285
321 days ago
37-56728
37 days
25071 erdOne
author:erdOne
 feat(EllipticCurve): basic API for singular cubics --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-algebraic-geometry 320/0 Mathlib.lean,Mathlib/AlgebraicGeometry/EllipticCurve/Singular/Basic.lean,Mathlib/AlgebraicGeometry/EllipticCurve/VariableChange.lean 3 35 ['Multramate', 'acmepjz', 'erdOne', 'github-actions', 'leanprover-community-bot-assistant'] nobody
321-64039
10 months ago
321-64040
321 days ago
45-4165
45 days
25218 kckennylau
author:kckennylau
 feat(AlgebraicGeometry): Tate normal form of elliptic curves --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-algebraic-geometry awaiting-zulip new-contributor 291/26 Mathlib.lean,Mathlib/AlgebraicGeometry/EllipticCurve/IsomOfJ.lean,Mathlib/AlgebraicGeometry/EllipticCurve/Modular/TateNormalForm.lean,Mathlib/AlgebraicGeometry/EllipticCurve/NormalForms.lean,Mathlib/AlgebraicGeometry/EllipticCurve/VariableChange.lean 5 31 ['MichaelStollBayreuth', 'Multramate', 'acmepjz', 'github-actions', 'grunweg', 'kckennylau', 'leanprover-community-bot-assistant'] nobody
321-64036
10 months ago
354-39153
354 days ago
6-47693
6 days
25561 callesonne
author:callesonne
 feat(Category/Grpd): define the bicategory of groupoids --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict awaiting-author t-category-theory 179/25 Mathlib.lean,Mathlib/AlgebraicTopology/FundamentalGroupoid/InducedMaps.lean,Mathlib/CategoryTheory/Bicategory/Functor/Pseudofunctor.lean,Mathlib/CategoryTheory/Bicategory/Functor/Strict.lean,Mathlib/CategoryTheory/Category/Cat.lean,Mathlib/CategoryTheory/Category/Grpd.lean 6 6 ['callesonne', 'github-actions', 'joelriou', 'leanprover-community-bot-assistant', 'robin-carlier'] nobody
321-64021
10 months ago
338-15344
338 days ago
10-55201
10 days
20784 eric-wieser
author:eric-wieser
 fix: prevent `exact?` recursing forever on `n = 55` Test case thanks to @llllvvuu: ```lean import Mathlib.SetTheory.Ordinal.Basic theorem natCast_inj {m n : ℕ} : (m : Ordinal) = n ↔ m = n := sorry example (n : Nat) : n = 55 := by exact? ``` This is surely a workaround for some unreported lean bug. The bug still exists for `n = 71` or higher, so we can still track down the bug after merging this patch. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-set-theory 22/3 Mathlib/SetTheory/Ordinal/Basic.lean,MathlibTest/LibrarySearchRecDepth.lean 2 15 ['Command-Master', 'eric-wieser', 'github-actions', 'kbuzzard', 'kim-em', 'leanprover-bot', 'leanprover-community-bot-assistant', 'mattrobball'] nobody
321-32721
10 months ago
459-5083
459 days ago
32-73698
32 days
26647 b-mehta
author:b-mehta
 feat(Data/Sym/Sym2): lift commutative operations to sym2 While we have `Sym2.lift`, it's often useful to lift operations which are known to be commutative to the typeclass system. Indeed, the existing `Sym2.mul` witnesses this already. Thus, this PR can also be seen as generalising `Sym2.mul`. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict WIP t-data 48/28 Mathlib/Data/Sym/Sym2.lean,Mathlib/Data/Sym/Sym2/Finsupp.lean,Mathlib/LinearAlgebra/QuadraticForm/Basic.lean,Mathlib/LinearAlgebra/QuadraticForm/Basis.lean 4 12 ['b-mehta', 'eric-wieser', 'github-actions', 'leanprover-community-bot-assistant'] nobody
319-67317
10 months ago
320-154
319 days ago
3-71897
3 days
25611 erdOne
author:erdOne
 chore(RingTheory): add `Algebra (FractionRing R) (FractionRing S)` Co-authored-by: Yakov Pechersky --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-algebra
label:t-algebra$
 152/108 Mathlib.lean,Mathlib/Algebra/Algebra/NonZeroDivisors.lean,Mathlib/NumberTheory/RamificationInertia/Galois.lean,Mathlib/RingTheory/DedekindDomain/Different.lean,Mathlib/RingTheory/DedekindDomain/IntegralClosure.lean,Mathlib/RingTheory/Ideal/Norm/RelNorm.lean,Mathlib/RingTheory/IntegralClosure/IntegralRestrict.lean,Mathlib/RingTheory/Localization/FractionRing.lean,Mathlib/RingTheory/Localization/FractionRingAlgebra.lean,Mathlib/RingTheory/Localization/Integral.lean 10 20 ['alreadydone', 'erdOne', 'eric-wieser', 'github-actions', 'leanprover-community-bot-assistant', 'pechersky'] nobody
311-33923
10 months ago
345-29609
345 days ago
2-26945
2 days
18230 digama0
author:digama0
 feat(Tactic/ScopedNS): extend `scoped[NS]` to more commands refactor `ScopedNS` to remove error prone repetitiveness and extend it to other commands such as `syntax`, `macro`, `elab`, etc. Co-authored-by: Jon Eugster --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) awaiting-author t-meta 201/26 Mathlib/Tactic/ScopedNS.lean,MathlibTest/scopedNS.lean 2 7 ['adomani', 'digama0', 'eric-wieser', 'github-actions', 'joneugster', 'kbuzzard'] nobody
309-40384
10 months ago
452-39889
452 days ago
41-32344
41 days
25284 alreadydone
author:alreadydone
 feat(LinearAlgebra/Contraction): bijectivity of `dualTensorHom` + generalize to CommSemiring --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict awaiting-author t-algebra
label:t-algebra$
 167/32 Mathlib/Data/Finsupp/Defs.lean,Mathlib/LinearAlgebra/Contraction.lean,Mathlib/LinearAlgebra/Pi.lean,Mathlib/LinearAlgebra/Trace.lean,Mathlib/RingTheory/Finiteness/Finsupp.lean 5 16 ['alreadydone', 'eric-wieser', 'github-actions', 'kckennylau', 'leanprover-bot', 'leanprover-community-bot-assistant'] nobody
303-84863
9 months ago
310-50630
310 days ago
45-36570
45 days
22749 joelriou
author:joelriou
 feat(CategoryTheory/Abelian): the Gabriel-Popescu theorem as a localization with respect to a Serre class This PR introduces a structure `GabrielPopescuPackage C` which contains the information to say that the abelian category `C` is a localization of a category of modules with respect to a suitable Serre class. --- - [x] depends on: #26033 - [ ] depends on: #26663 - [x] depends on: #22733 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict WIP t-category-theory 202/6 Mathlib.lean,Mathlib/CategoryTheory/Abelian/GrothendieckCategory/ModuleEmbedding/GabrielPopescu.lean,Mathlib/CategoryTheory/Abelian/SerreClass/Bousfield.lean,Mathlib/CategoryTheory/Abelian/SerreClass/MorphismProperty.lean,Mathlib/CategoryTheory/ObjectProperty/ContainsZero.lean 5 3 ['github-actions', 'leanprover-community-bot-assistant', 'mathlib4-dependent-issues-bot'] nobody
303-41749
9 months ago
323-27550
323 days ago
0-10614
2 hours
24668 robertmaxton42
author:robertmaxton42
 feat(LinearAlgebra): add inductive principle for the free product of algebras * Add `FreeProduct.inductionOn` and `.asPowers.inductionOn`. - [ ] depends on: #24532 --- * `simp↓` on `empty_rel'_bot`: the LHS is indeed not in simp-normal form, but `simp` can't solve the full lemma (if only because `Function.onFun` isn't marked `@[simp]`) and the actual simp-normal form of `rel'` isn't terribly useful for humans. Since I do expect users to type `rel' R A` by hand, I claim this use of `simp↓` is justified. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-algebra blocked-by-other-PR
label:t-algebra$
 205/9 Mathlib/LinearAlgebra/FreeProduct/Basic.lean 1 3 ['github-actions', 'leanprover-community-bot-assistant', 'mathlib4-dependent-issues-bot'] nobody
300-72331
9 months ago
379-84540
379 days ago
0-229
3 minutes
13973 digama0
author:digama0
 feat: lake exe refactor, initial framework This is the initial framework code for `lake exe refactor`. To use it, you add your refactoring to `Refactor/Main.lean` (note, you have to actually write some metaprogramming code here for the refactoring itself), and the harness will run it on specified files and apply the generated edits. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict awaiting-author t-meta 139/0 Refactor/Main.lean,lakefile.lean 2 11 ['adomani', 'digama0', 'eric-wieser', 'github-actions', 'joneugster', 'leanprover-community-bot-assistant', 'mattrobball'] nobody
297-25922
9 months ago
646-29375
646 days ago
6-30547
6 days
10190 jstoobysmith
author:jstoobysmith
 feat(AlgebraicTopology): add Augmented Simplex Category - Added the definition of the category FinLinOrd of finite linear ordered sets. - Added the definition of the augmented simplex category `AugmentedSimplexCategory`, and showed it is the Skeleton of FinLinOrd. - Showed that the category of augmented simplicial objects defined as a comma category is equivalent to the category of functors from `AugmentedSimplexCategory^\op` --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebraic-topology WIP t-category-theory new-contributor merge-conflict 720/0 Mathlib.lean,Mathlib/AlgebraicTopology/AugmentedSimplexCategory.lean,Mathlib/AlgebraicTopology/SimplicialObject.lean,Mathlib/Order/Category/FinLinOrd.lean 4 5 ['TwoFX', 'YaelDillies', 'joelriou', 'jstoobysmith'] nobody
295-36176
9 months ago
832-29102
832 days ago
7-63253
7 days
25914 eric-wieser
author:eric-wieser
 feat: add an ext lemma for the opposite category This powers up `aesop_cat`. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict awaiting-author t-category-theory awaiting-CI 18/56 Mathlib/AlgebraicTopology/SimplicialObject/Basic.lean,Mathlib/CategoryTheory/Abelian/Opposite.lean,Mathlib/CategoryTheory/Category/RelCat.lean,Mathlib/CategoryTheory/GuitartExact/Opposite.lean,Mathlib/CategoryTheory/Limits/Opposites.lean,Mathlib/CategoryTheory/Limits/Shapes/Products.lean,Mathlib/CategoryTheory/Opposites.lean,Mathlib/CategoryTheory/Triangulated/Opposite/Functor.lean,Mathlib/Combinatorics/Quiver/Basic.lean 9 7 ['eric-wieser', 'github-actions', 'grunweg', 'leanprover-community-bot-assistant', 'robin-carlier'] nobody
295-33819
9 months ago
341-23235
341 days ago
0-523
8 minutes
20208 js2357
author:js2357
 feat: Define the localization of a fractional ideal at a prime ideal Define the localization of a fractional ideal at a prime ideal, and prove some basic properties. --- Alternate version of #14237 generalized to use `IsLocalization` and `IsFractionRing` rather than `Localization.AtPrime` and `FractionRing` [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict WIP t-algebra
label:t-algebra$
 248/0 Mathlib.lean,Mathlib/RingTheory/FractionalIdeal/LocalizedAtPrime.lean 2 2 ['github-actions', 'leanprover-community-bot-assistant'] nobody
295-19062
9 months ago
515-163
514 days ago
0-21
21 seconds
24260 plp127
author:plp127
 feat(Topology): add API for Hereditarily Lindelof spaces Copies the stuff about Lindelof spaces to Hereditarily Lindelof spaces. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict awaiting-author t-topology 222/42 Mathlib/Topology/Compactness/Lindelof.lean 1 15 ['github-actions', 'grunweg', 'mathlib4-merge-conflict-bot', 'urkud'] urkud
assignee:urkud
294-75034
9 months ago
366-35674
366 days ago
29-42365
29 days
27225 eric-wieser
author:eric-wieser
 refactor(Tactic/Lift): deprecate the third with argument We already have a number of tactics where the clearing happens all the time, and you have to opt out with `id h`. This also fixes a bug where `lift z to Nat with n hn this_is_unused` would silently ignore `this_is_unused`. --- - [ ] depends on: #27223 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) awaiting-author t-meta merge-conflict 21/9 Mathlib/Tactic/Lift.lean,MathlibTest/lift.lean 2 9 ['JovanGerb', 'adomani', 'eric-wieser', 'github-actions', 'leanprover-community-bot-assistant', 'mathlib-merge-conflicts', 'mathlib4-dependent-issues-bot', 'vihdzp'] JovanGerb
assignee:JovanGerb
292-70945
9 months ago
293-31445
293 days ago
15-64386
15 days
25238 Hagb
author:Hagb
 feat(Tactic/ComputeDegree): add support for scalar multiplication with different types It would be able to deal with `a • (X : R[X])` where `a : S` is in a different type `S` with `[SMulZeroClass S R]`. --- - [x] depends on: #25237 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-meta new-contributor 17/5 Mathlib/Tactic/ComputeDegree.lean,MathlibTest/ComputeDegree.lean 2 3 ['github-actions', 'leanprover-community-bot-assistant', 'mathlib4-dependent-issues-bot'] nobody
291-42367
9 months ago
321-64036
321 days ago
38-26044
38 days
22909 AntoineChambert-Loir
author:AntoineChambert-Loir
 feat(RingTheory/Pure): pure submodules A submodule `N` of an `R`-module is *pure* if all maps `S ⊗[R] N → S ⊗[R] M` deduced by base change from the injection of `N` into `M` are injective, for all `R`-algebras `S`. This is expressed by the class `Submodule.IsPure`. For type theoretic reason, the definition of `Submodule.IsPure` only considers algebras `S` in the same universe as `R`, but `Submodule.IsPure.baseChange_injective` establishes the property for all universes. * `Submodule.IsComplemented.isPure` : a complemented submodule is pure. Co-authored with @mariainesdff --- - [ ] depends on: #22898 - [ ] depends on: #22908 - [x] depends on: #22911 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-ring-theory blocked-by-other-PR 592/3 Mathlib.lean,Mathlib/Algebra/Algebra/Equiv.lean,Mathlib/RingTheory/Adjoin/FG.lean,Mathlib/RingTheory/Finiteness/Basic.lean,Mathlib/RingTheory/Finiteness/Cardinality.lean,Mathlib/RingTheory/Finiteness/Small.lean,Mathlib/RingTheory/Pure.lean,Mathlib/RingTheory/Spectrum/Prime/RingHom.lean,Mathlib/RingTheory/TensorProduct/Basic.lean,Mathlib/RingTheory/TensorProduct/DirectLimit/FG.lean,Mathlib/RingTheory/TensorProduct/DirectLimit/Small.lean 11 3 ['github-actions', 'leanprover-community-bot-assistant', 'mathlib4-dependent-issues-bot'] nobody
290-44509
9 months ago
434-81715
434 days ago
0-1047
17 minutes
22908 AntoineChambert-Loir
author:AntoineChambert-Loir
 feat(RingTheory/Finiteness/Small): tensor product of the system of small submodules The directed limit of a tensor product for the directed system of small submodules. Co-authored with @mariainesdff --- - [ ] depends on: #22898 - [x] depends on: #22911 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-ring-theory blocked-by-other-PR 624/2 Mathlib.lean,Mathlib/RingTheory/Adjoin/FG.lean,Mathlib/RingTheory/Finiteness/Basic.lean,Mathlib/RingTheory/Finiteness/Cardinality.lean,Mathlib/RingTheory/Finiteness/Small.lean,Mathlib/RingTheory/Spectrum/Prime/RingHom.lean,Mathlib/RingTheory/TensorProduct/Basic.lean,Mathlib/RingTheory/TensorProduct/DirectLimit/FG.lean,Mathlib/RingTheory/TensorProduct/DirectLimit/Small.lean 9 2 ['github-actions', 'mathlib4-dependent-issues-bot'] nobody
290-44461
9 months ago
434-81714
434 days ago
0-3552
59 minutes
22898 AntoineChambert-Loir
author:AntoineChambert-Loir
 feat(RingTheory/TensorProduct/DirectLimit/FG): direct limit of finitely generated submodules and tensor product --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict WIP t-ring-theory 399/0 Mathlib.lean,Mathlib/RingTheory/Adjoin/FG.lean,Mathlib/RingTheory/Finiteness/Basic.lean,Mathlib/RingTheory/TensorProduct/Basic.lean,Mathlib/RingTheory/TensorProduct/DirectLimit/FG.lean 5 9 ['AntoineChambert-Loir', 'alreadydone', 'github-actions', 'leanprover-community-bot-assistant'] nobody
290-44454
9 months ago
424-76955
424 days ago
10-44390
10 days
20431 erdOne
author:erdOne
 feat(RingTheory/AdicCompletion): monotonicity of adic-completeness --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict awaiting-author t-ring-theory 206/16 Mathlib.lean,Mathlib/Algebra/Module/Submodule/Defs.lean,Mathlib/Algebra/Module/Submodule/Pointwise.lean,Mathlib/RingTheory/AdicCompletion/Algebra.lean,Mathlib/RingTheory/AdicCompletion/Basic.lean,Mathlib/RingTheory/AdicCompletion/Mono.lean,Mathlib/RingTheory/Finiteness/Ideal.lean 7 13 ['chrisflav', 'erdOne', 'github-actions'] nobody
290-44410
9 months ago
466-43444
466 days ago
32-78180
32 days
19596 Command-Master
author:Command-Master
 feat(RingTheory/Valuation/PrimeMultiplicity): define `WithTop ℤ`-valued prime multiplicity on a fraction field Moves: - `multiplicity_addValuation` -> `AddValuation.multiplicity` - `multiplicity_addValuation_apply` -> `AddValuation.multiplicity_apply` --- - [x] depends on: #19149 - [x] depends on: #18786 - [x] depends on: #19122 - [x] depends on: #18954 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict awaiting-author t-ring-theory large-import 101/37 Mathlib/Data/ENat/Basic.lean,Mathlib/RingTheory/DiscreteValuationRing/Basic.lean,Mathlib/RingTheory/Valuation/PrimeMultiplicity.lean 3 11 ['ChrisHughes24', 'Command-Master', 'Vierkantor', 'faenuccio', 'github-actions', 'mathlib4-dependent-issues-bot'] nobody
290-44395
9 months ago
495-20329
495 days ago
8-2214
8 days
18646 jxjwan
author:jxjwan
 feat(RingTheory): isotypic components --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-ring-theory new-contributor 308/0 Mathlib/Order/CompactlyGenerated/Basic.lean,Mathlib/RingTheory/Isotypic.lean,Mathlib/RingTheory/SimpleModule.lean 3 1 ['github-actions'] nobody
290-44388
9 months ago
543-37981
543 days ago
20-16585
20 days
17246 pechersky
author:pechersky
 feat(RingTheory/PrimaryDecomposition): PIR of Noetherian under jacobson condition --- - [x] depends on: #17634 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict awaiting-author t-ring-theory 653/1 Mathlib.lean,Mathlib/NumberTheory/KummerDedekind.lean,Mathlib/RingTheory/Ideal/Maps.lean,Mathlib/RingTheory/Ideal/Operations.lean,Mathlib/RingTheory/Ideal/Quotient/Operations.lean,Mathlib/RingTheory/Jacobson/Ideal.lean,Mathlib/RingTheory/PrimaryDecomposition.lean,docs/references.bib 8 8 ['erdOne', 'github-actions', 'mathlib4-dependent-issues-bot'] erdOne
assignee:erdOne
290-44382
9 months ago
551-66275
551 days ago
13-7138
13 days
21474 erdOne
author:erdOne
 feat(RingTheory): replace `Ring.DimensionLEOne` with `Ring.KrullDimLE` --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-ring-theory large-import 285/170 Mathlib.lean,Mathlib/RingTheory/DedekindDomain/Basic.lean,Mathlib/RingTheory/DedekindDomain/Dvr.lean,Mathlib/RingTheory/DedekindDomain/Ideal.lean,Mathlib/RingTheory/DiscreteValuationRing/TFAE.lean,Mathlib/RingTheory/Ideal/Over.lean,Mathlib/RingTheory/KrullDimension/Basic.lean,Mathlib/RingTheory/KrullDimension/Localization.lean,Mathlib/RingTheory/KrullDimension/Polynomial.lean,Mathlib/RingTheory/KrullDimension/Quotient.lean,Mathlib/RingTheory/LocalRing/ResidueField/Basic.lean,Mathlib/RingTheory/Nilpotent/End.lean,Mathlib/RingTheory/Nilpotent/Lemmas.lean,Mathlib/RingTheory/PID/Quotient.lean,Mathlib/RingTheory/PrincipalIdealDomain.lean,Mathlib/RingTheory/Spectrum/Maximal/Localization.lean 16 1 ['github-actions'] nobody
290-44326
9 months ago
471-24363
471 days ago
0-81
1 minute
11212 shuxuezhuyi
author:shuxuezhuyi
 feat(GroupTheory/GroupAction): instance `MulAction (β ⧸ H) α` We instance this naturally from `MulAction β α` when `H` is a normal subgroup and acts trivially on `α`. We also instance `IsometricSMul (M ⧸ N) X` in this way. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict awaiting-author t-group-theory large-import 53/1 Mathlib/GroupTheory/GroupAction/Quotient.lean,Mathlib/Topology/MetricSpace/IsometricSMul.lean 2 6 ['YaelDillies', 'github-actions', 'grunweg', 'urkud'] eric-wieser
assignee:eric-wieser
290-44118
9 months ago
503-45457
503 days ago
193-73871
193 days
17469 joelriou
author:joelriou
 feat(Algebra/ModuleCat/Differentials/Presheaf): the presheaf of relative differentials Given a functor `F : C ⥤ D`, presheaves of commutative rings `S`, `R` and a morphism `φ : S ⟶ F.op ⋙ R`, we show that derivations relative to `φ` are representable by a presheaf of `R`-modules. This is obtained by reducing to the case of absolute differentials. The construction shall allow to deduce the presheaf version of the cokernel sequence $$f^\star \Omega_{Y/S} ⟶ \Omega_{X/S} ⟶ \Omega_{X/Y} ⟶ 0$$ when `f : X ⟶ Y` and `g : Y ⟶ S` are morphisms of schemes. --- - [x] depends on: #17366 - [x] depends on: #19507 - [x] depends on: #17388 - [x] depends on: #16755 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) WIP t-category-theory large-import merge-conflict t-algebraic-geometry 391/10 Mathlib/Algebra/Category/ModuleCat/Differentials/Presheaf.lean 1 4 ['github-actions', 'leanprover-community-bot-assistant', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
289-75069
9 months ago
593-31776
593 days ago
0-530
8 minutes
20671 thefundamentaltheor3m
author:thefundamentaltheor3m
 feat(Analysis/Asymptotics/SpecificAsymptotics): Proving that 𝛔ₖ(n) = O(nᵏ⁺¹) This PR proves a result about the $\sigma_k(n)$ arithmetic function, namely, that it is $O\left(n^{k+1}\right)$. Main theorem: `theorem sigma_asymptotic (k : ℕ) : (fun n ↦ (σ k n : ℝ)) =O[atTop] (fun n ↦ (n ^ (k + 1) : ℝ))` This result was proved as part of the sphere packing project. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-number-theory new-contributor large-import merge-conflict awaiting-author 29/0 Mathlib/Analysis/Asymptotics/SpecificAsymptotics.lean 1 3 ['b-mehta', 'github-actions', 'mathlib4-merge-conflict-bot'] b-mehta
assignee:b-mehta
285-47929
9 months ago
486-22744
486 days ago
9-59130
9 days
20267 joelriou
author:joelriou
 feat(CategoryTheory): comma categories are accessible --- (I shall probably not work on this PR in the near future.) - [ ] depends on: #19937 - [ ] depends on: #19945 - [ ] depends on: #19959 - [ ] depends on: #20005 - [ ] depends on: #19955 - [x] depends on: #20263 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict WIP awaiting-author t-category-theory 1513/7 Mathlib.lean,Mathlib/CategoryTheory/Comma/Arrow.lean,Mathlib/CategoryTheory/Comma/CardinalArrow.lean,Mathlib/CategoryTheory/EssentiallySmall.lean,Mathlib/CategoryTheory/Limits/Comma.lean,Mathlib/CategoryTheory/Limits/TypesFiltered.lean,Mathlib/CategoryTheory/Presentable/Basic.lean,Mathlib/CategoryTheory/Presentable/CardinalFilteredPresentation.lean,Mathlib/CategoryTheory/Presentable/Comma.lean,Mathlib/CategoryTheory/Presentable/IsCardinalFiltered.lean,Mathlib/CategoryTheory/Presentable/Limits.lean,Mathlib/CategoryTheory/Presentable/LocallyPresentable.lean,Mathlib/CategoryTheory/Presentable/ParallelMaps.lean,Mathlib/SetTheory/Cardinal/HasCardinalLT.lean,docs/references.bib 15 2 ['github-actions', 'mathlib4-dependent-issues-bot'] nobody
285-40896
9 months ago
unknown
0-0
0 seconds
24862 grunweg
author:grunweg
 feat(LocallyIntegrable): generalise more to enorms --- Note: github's diff is very confused; it includes changes which very clearly are already on the master branch. I'll see which of the remaining changes after the dependencies have landed is already polished enough. - [x] depends on: #24352 - [x] depends on: #27457 (this half is settled already) - [ ] open question: filter lemmas; IsBoundedUnder is not the right condition as-is; need to think (or just not generalise) [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict WIP carleson t-measure-probability 171/88 Mathlib/MeasureTheory/Function/L1Space/HasFiniteIntegral.lean,Mathlib/MeasureTheory/Function/LocallyIntegrable.lean,Mathlib/MeasureTheory/Integral/IntegrableOn.lean 3 3 ['github-actions', 'leanprover-community-bot-assistant', 'mathlib4-dependent-issues-bot'] nobody
284-19173
9 months ago
374-532
374 days ago
0-1
1 second
27003 eric-wieser
author:eric-wieser
 chore: use `Simp.ResultQ` more often Also uses `~q` in place of manual `isDefEq` matching. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-meta 18/22 Mathlib/Tactic/NormNum/Core.lean,Mathlib/Tactic/NormNum/Result.lean,Mathlib/Tactic/ReduceModChar.lean 3 7 ['JovanGerb', 'eric-wieser', 'github-actions', 'mathlib4-merge-conflict-bot'] JovanGerb
assignee:JovanGerb
282-40076
9 months ago
282-40077
282 days ago
32-70098
32 days
25401 digama0
author:digama0
 feat(Util): SuppressSorry option See also leanprover/lean4#8611 and [#lean4 > Silent sorry @ 💬](https://leanprover.zulipchat.com/#narrow/channel/270676-lean4/topic/Silent.20sorry/near/503537964). This is a stop-gap solution while leanprover/lean4#8611 is underway, but it works about as well as any other built in option. Hooking declaration elaborators turns out to be a very powerful technique. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-meta 342/0 Mathlib.lean,Mathlib/Util/CommandElabHook.lean,Mathlib/Util/SuppressSorry.lean,MathlibTest/suppressSorry.lean 4 15 ['digama0', 'eric-wieser', 'github-actions', 'mathlib4-merge-conflict-bot'] alexjbest
assignee:alexjbest
281-81272
9 months ago
281-81272
281 days ago
71-27957
71 days
5897 eric-wieser
author:eric-wieser
 feat: add a `MonadError` instance for `ContT` We already have a `MonadExcept` instance; this promotes it to `MonadError`. Note the issue with the existing `MonadExcept` instance still applies. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) awaiting-author t-meta 16/0 Mathlib/Control/Monad/Cont.lean 1 25 ['Vierkantor', 'YaelDillies', 'eric-wieser', 'github-actions', 'kmill'] nobody
277-38427
9 months ago
703-51229
703 days ago
339-54818
339 days
24793 tristan-f-r
author:tristan-f-r
 feat: trace of unitarily similar matrices adds a theorem relating trace to unitarily similar matrices used in the easy direction of specht's theorem --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict awaiting-author t-algebra
label:t-algebra$
 7/0 Mathlib/LinearAlgebra/UnitaryGroup.lean 1 4 ['github-actions', 'j-loreaux', 'mathlib4-merge-conflict-bot', 'tristan-f-r'] nobody
275-80391
9 months ago
374-25440
374 days ago
1-55872
1 day
19582 yu-yama
author:yu-yama
 feat(GroupExtension/Abelian): define `OfMulDistribMulAction.equivH2` Mainly defines: - `structure GroupExtension.OfMulDistribMulAction N G [MulDistribMulAction G N]`: group extensions of `G` by `N` where the multiplicative action of `G` on `N` is the conjugation - `structure GroupExtension.OfMulDistribMulActionWithSection N G [MulDistribMulAction G N]`: group extensions with specific choices of sections - `def GroupExtension.OfMulDistribMulAction.equivH2`: a bijection between the equivalence classes of group extensions and $H^2 (G, N)$ --- - [x] depends on: #20802 (split PR: contains changes to the `Defs` file) - [x] depends on: #20998 (split PR: mainly adds the `Basic` file) - [ ] depends on: #26670 (split PR: adds the first part of the `Abelian` file) Here is a relevant TODO in Mathlib: https://github.com/leanprover-community/mathlib4/blob/4e9fa40d7c480937e09cd6e47a591bd6f3b8be42/Mathlib/RepresentationTheory/GroupCohomology/LowDegree.lean#L46-L48 I would appreciate your comments. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-algebra blocked-by-other-PR new-contributor
label:t-algebra$
 750/14 Mathlib.lean,Mathlib/GroupTheory/GroupExtension/Abelian.lean,Mathlib/GroupTheory/GroupExtension/Defs.lean,docs/references.bib 4 5 ['YaelDillies', 'erdOne', 'github-actions', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
274-9533
9 months ago
496-66492
496 days ago
43-22586
43 days
7300 ah1112
author:ah1112
 feat: synthetic geometry This is adding synthetic geometry using Avigad's axioms and formalizing Euclid Book I, through the Pythagorean theorem. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict awaiting-author help-wanted t-euclidean-geometry 2661/0 Mathlib.lean,Mathlib/Geometry/Synthetic/Avigad/Axioms.lean,Mathlib/Geometry/Synthetic/Avigad/EuclidBookI.lean,Mathlib/Geometry/Synthetic/Avigad/Tactics.lean 4 74 ['ah1112', 'alreadydone', 'eric-wieser', 'github-actions', 'leanprover-community-bot-assistant', 'plp127', 'tb65536', 'urkud'] nobody
273-72564
9 months ago
974-25049
974 days ago
0-84
1 minute
24719 madvorak
author:madvorak
 feat(LinearAlgebra/Matrix/NonsingularInverse): inverting `Matrix` inverts its `LinearEquiv` --- Discussion: https://leanprover.zulipchat.com/#narrow/channel/144837-PR-reviews/topic/.2324719.20cannot.20find.20home/with/517142655 awaiting-author t-algebra
label:t-algebra$
 10/0 Mathlib/LinearAlgebra/Matrix/NonsingularInverse.lean 1 16 ['eric-wieser', 'github-actions', 'madvorak', 'ocfnash'] nobody
269-47044
8 months ago
291-29021
291 days ago
86-37603
86 days
25208 erdOne
author:erdOne
 feat(LinearAlgebra): `tensor_induction` macro --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict WIP t-algebra RFC
label:t-algebra$
 87/116 Mathlib/Algebra/Category/ModuleCat/ChangeOfRings.lean,Mathlib/Algebra/Central/TensorProduct.lean,Mathlib/LinearAlgebra/DirectSum/Finsupp.lean,Mathlib/LinearAlgebra/TensorProduct/Basic.lean,Mathlib/RingTheory/Flat/Equalizer.lean,Mathlib/RingTheory/TensorProduct/Basic.lean,Mathlib/RingTheory/TensorProduct/Finite.lean,Mathlib/RingTheory/Unramified/Finite.lean 8 8 ['chrisflav', 'eric-wieser', 'github-actions', 'leanprover-bot', 'mathlib4-merge-conflict-bot'] nobody
262-62153
8 months ago
361-33600
361 days ago
0-600
10 minutes
13036 joelriou
author:joelriou
 feat(CategoryTheory/Sites): under certain conditions, cover preserving functors preserve 1-hypercovers Previously, in order to show that a functor between Grothendieck sites was continuous, it was necessary to show that it was "cover preserving" and "compatible preserving". There were two lemmas which could be used in order to show that a functor was "compatible preserving". Since #13012, the better condition of "1-hypercover preserving" functor was introduced and it implies that the functor is continuous. In this PR, under the same assumptions as in the two lemmas mentionned above, we show that cover preserving functors are 1-hypercover preserving functors. This gives slightly better criteria in order to show that a functor is continuous. --- - [x] depends on: #13004 - [x] depends on: #13011 - [x] depends on: #13012 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict WIP t-category-theory 94/7 Mathlib/CategoryTheory/Sites/Continuous.lean,Mathlib/CategoryTheory/Sites/CoverPreserving.lean,Mathlib/CategoryTheory/Sites/Over.lean,Mathlib/CategoryTheory/Sites/Sieves.lean 4 3 ['github-actions', 'leanprover-community-mathlib4-bot', 'mathlib4-merge-conflict-bot'] nobody
253-84101
8 months ago
733-36633
733 days ago
0-1
1 second
27335 eric-wieser
author:eric-wieser
 chore(Data/List): use simp-normal-form for boolean equalities This replaces `¬(p x = true)` with `p x = false`. It also makes explicit some adjacent `h : p x` spellings for symmetry, but the `= true`s were already implied by the coercion. Zulip: [#lean4 > `h : ¬(b = true)` vs `h : b = false` @ 💬](https://leanprover.zulipchat.com/#narrow/channel/270676-lean4/topic/.60h.20.3A.20.C2.AC.28b.20.3D.20true.29.60.20vs.20.60h.20.3A.20b.20.3D.20false.60/near/529976237) --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-data 38/32 Mathlib/Data/List/DropRight.lean,Mathlib/Data/List/SplitOn.lean,Mathlib/Data/List/TakeWhile.lean 3 3 ['github-actions', 'leanprover-community-bot-assistant', 'mathlib4-merge-conflict-bot'] nobody
253-67743
8 months ago
304-62928
304 days ago
0-19242
5 hours
22517 j-loreaux
author:j-loreaux
 feat: `ℕ+` powers in semigroups --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict WIP large-import 275/28 Mathlib.lean,Mathlib/Algebra/Group/Defs.lean,Mathlib/Algebra/Group/Ext.lean,Mathlib/Algebra/Group/PNatPowAssoc.lean,Mathlib/Algebra/Group/PPow.lean,Mathlib/Algebra/Group/TypeTags/Basic.lean,Mathlib/Algebra/Ring/Ext.lean,Mathlib/Algebra/Ring/ULift.lean,Mathlib/Data/Num/Lemmas.lean,Mathlib/Data/Real/Basic.lean,Mathlib/Data/ZMod/Defs.lean,Mathlib/LinearAlgebra/LinearPMap.lean,Mathlib/NumberTheory/Dioph.lean,Mathlib/Tactic/ToAdditive/Frontend.lean 14 6 ['eric-wieser', 'github-actions', 'j-loreaux', 'leanprover-bot', 'mattrobball'] nobody
252-1684
8 months ago
445-3265
445 days ago
0-27
27 seconds
29615 eric-wieser
author:eric-wieser
 chore: add a computable shortcut for `AddCommMonoid ℂ` --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-analysis easy 9/1 Mathlib/Analysis/Complex/Basic.lean 1 1 ['github-actions'] nobody
251-42543
8 months ago
251-42626
251 days ago
251-42337
251 days
25069 erdOne
author:erdOne
 feat(EllipticCurve): rational points of singular nodal cubics --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict awaiting-author t-algebraic-geometry 251/0 Mathlib.lean,Mathlib/AlgebraicGeometry/EllipticCurve/Affine/Basic.lean,Mathlib/AlgebraicGeometry/EllipticCurve/Singular/Node.lean 3 14 ['Multramate', 'acmepjz', 'chrisflav', 'erdOne', 'github-actions', 'grunweg', 'mathlib4-merge-conflict-bot'] chrisflav
assignee:chrisflav
250-16885
8 months ago
266-48694
266 days ago
100-20892
100 days
25070 erdOne
author:erdOne
 feat(EllipticCurve): rational points on singular cuspidal cubics --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict awaiting-author t-algebraic-geometry 123/0 Mathlib.lean,Mathlib/AlgebraicGeometry/EllipticCurve/Singular/Cusp.lean 2 12 ['Multramate', 'acmepjz', 'adamtopaz', 'erdOne', 'github-actions', 'kckennylau', 'mathlib4-merge-conflict-bot'] adamtopaz
assignee:adamtopaz
250-16884
8 months ago
276-17848
276 days ago
90-52970
90 days
28580 kmill
author:kmill
 refactor: simplify implementation of `filter_upwards` This PR makes a few changes to `filter_upwards`: - it uses `focus`, which prevents multiGoalLinter from ever blaming the tactics used inside its implementation - it constructs the whole proof syntax and elaborates it at once using `evalTactic` and `refine`, rather than using the lower-level TermElab API, which can lose track of goals - it's written in a way that doesn't require goals to be in some particular order This was motivated by some multiGoalLinter issues I ran into when working on https://github.com/leanprover/lean4/pull/9942 --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-order t-meta 14/16 Mathlib/Order/Filter/Defs.lean 1 2 ['github-actions', 'mathlib4-merge-conflict-bot'] nobody
249-29237
8 months ago
277-63302
277 days ago
0-8809
2 hours
7125 eric-wieser
author:eric-wieser
 feat: additive monoid structure via biproducts I suspect I'm missing a trick with these transport lemmas. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict WIP t-category-theory awaiting-CI 237/0 Mathlib/CategoryTheory/Limits/Skeleton.lean 1 3 ['alreadydone', 'eric-wieser', 'mathlib4-merge-conflict-bot'] nobody
247-2342
8 months ago
unknown
0-0
0 seconds
21950 erdOne
author:erdOne
 feat(NumberTheory/Padics): the completion of `ℚ` at a finite place is `ℚ_[p]` --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-number-theory 253/1 Mathlib.lean,Mathlib/Algebra/GroupWithZero/WithZero.lean,Mathlib/NumberTheory/Padics/HeightOneSpectrum.lean,Mathlib/NumberTheory/Padics/PadicNumbers.lean,Mathlib/Topology/Algebra/Valued/WithVal.lean,Mathlib/Topology/Algebra/WithZeroMulInt.lean,Mathlib/Topology/Algebra/WithZeroTopology.lean 7 33 ['Ruben-VandeVelde', 'erdOne', 'faenuccio', 'github-actions', 'leanprover-community-bot-assistant', 'pechersky', 'smmercuri', 'xroblot'] nobody
238-27328
7 months ago
319-27265
319 days ago
73-10873
73 days
23621 astrainfinita
author:astrainfinita
 chore: deprecate `LinearOrderedComm{Monoid, Group}WithZero` --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) - [x] depends on: #20676 merge-conflict t-algebra t-order
label:t-algebra$
 261/205 Archive/Imo/Imo1998Q2.lean,Counterexamples/LinearOrderWithPosMulPosEqZero.lean,Mathlib/Algebra/Order/Field/Canonical.lean,Mathlib/Algebra/Order/Field/Rat.lean,Mathlib/Algebra/Order/Floor/Ring.lean,Mathlib/Algebra/Order/GroupWithZero/Canonical.lean,Mathlib/Algebra/Order/GroupWithZero/Finset.lean,Mathlib/Algebra/Order/Hom/Monoid.lean,Mathlib/Algebra/Order/Nonneg/Field.lean,Mathlib/Algebra/Order/Nonneg/Ring.lean,Mathlib/Algebra/Order/Ring/Nat.lean,Mathlib/Combinatorics/Additive/PluenneckeRuzsa.lean,Mathlib/Combinatorics/SimpleGraph/Triangle/Basic.lean,Mathlib/Data/ENNReal/Basic.lean,Mathlib/Data/NNRat/Lemmas.lean,Mathlib/Data/NNReal/Defs.lean,Mathlib/Data/Rat/Cast/Order.lean,Mathlib/FieldTheory/IntermediateField/Adjoin/Defs.lean,Mathlib/FieldTheory/RatFunc/AsPolynomial.lean,Mathlib/GroupTheory/ArchimedeanDensely.lean,Mathlib/NumberTheory/EllipticDivisibilitySequence.lean,Mathlib/NumberTheory/FunctionField.lean,Mathlib/NumberTheory/Ostrowski.lean,Mathlib/RingTheory/Valuation/Archimedean.lean,Mathlib/RingTheory/Valuation/Basic.lean,Mathlib/RingTheory/Valuation/ExtendToLocalization.lean,Mathlib/RingTheory/Valuation/Integers.lean,Mathlib/RingTheory/Valuation/Integral.lean,Mathlib/RingTheory/Valuation/Minpoly.lean,Mathlib/RingTheory/Valuation/Quotient.lean,Mathlib/RingTheory/Valuation/RankOne.lean,Mathlib/RingTheory/Valuation/ValExtension.lean,Mathlib/RingTheory/Valuation/ValuationRing.lean,Mathlib/RingTheory/Valuation/ValuationSubring.lean,Mathlib/SetTheory/Cardinal/Order.lean,Mathlib/Topology/Algebra/Valued/LocallyCompact.lean,Mathlib/Topology/Algebra/Valued/NormedValued.lean,Mathlib/Topology/Algebra/Valued/ValuationTopology.lean,Mathlib/Topology/Algebra/Valued/ValuedField.lean,Mathlib/Topology/Algebra/Valued/WithVal.lean,Mathlib/Topology/Algebra/WithZeroTopology.lean,Mathlib/Topology/UnitInterval.lean,MathlibTest/instance_diamonds.lean,scripts/noshake.json 44 24 ['YaelDillies', 'astrainfinita', 'github-actions', 'grunweg', 'leanprover-bot', 'leanprover-community-bot-assistant', 'mathlib4-dependent-issues-bot'] kbuzzard
assignee:kbuzzard
230-21752
7 months ago
400-80525
400 days ago
5-42380
5 days
16773 arulandu
author:arulandu
 feat(Probability/Distributions): formalize Beta distribution Formalize Beta distribution, using Gamma distribution as a reference. Added real-valued beta wrapper, in the manner of gamma. Thanks to @EtienneC30 for help with casting real <-> complex. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict awaiting-author new-contributor t-measure-probability 286/1 Mathlib.lean,Mathlib/Analysis/SpecialFunctions/Gamma/Beta.lean,Mathlib/Probability/Distributions/Beta.lean 3 50 ['EtienneC30', 'arulandu', 'github-actions', 'mathlib4-merge-conflict-bot', 'vihdzp'] arulandu
assignee:arulandu
224-17672
7 months ago
614-45221
614 days ago
1-21124
1 day
29855 eric-wieser
author:eric-wieser
 chore(Data/Finset/Sort): lemmas about `0 : Fin _` and `Fin.last _` We already had these for `⟨0, ⋯⟩` and `⟨k - 1, ⋯⟩`. Moves: - `Finset.orderEmbOfFin_zero` -> `Finset.orderEmbOfFin_mk_zero` - `Finset.orderEmbOfFin_last` -> `Finset.orderEmbOfFin_mk_last` --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-data t-order delegated easy 17/7 Mathlib/Combinatorics/Enumerative/Composition.lean,Mathlib/Data/Finset/Sort.lean 2 4 ['eric-wieser', 'github-actions', 'mathlib-bors', 'ocfnash'] nobody
218-9040
7 months ago
239-41130
239 days ago
3-79002
3 days
19616 adamtopaz
author:adamtopaz
 fix: fix the definition of the absolute Galois group of a field Previously it was defined as the Galois group of the algebraic closure, as opposed to the separable closure. Also, this adds some missing instances for this group. Still missing is compactness, but that seems like a bigger project. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-algebra awaiting-author t-number-theory
label:t-algebra$
 23/8 Mathlib/FieldTheory/AbsoluteGaloisGroup.lean,Mathlib/FieldTheory/KrullTopology.lean 2 4 ['acmepjz', 'alreadydone', 'github-actions'] nobody
216-50662
7 months ago
535-29158
535 days ago
3-64280
3 days
25225 xcloudyunx
author:xcloudyunx
 feat(Combinatorics/SimpleGraph): Eulerian walk in connected graph contains all vertices --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) awaiting-author t-combinatorics new-contributor 16/0 Mathlib/Combinatorics/SimpleGraph/Trails.lean 1 6 ['IvanRenison', 'github-actions', 'vlad902'] kmill
assignee:kmill
212-77854
7 months ago
212-77854
212 days ago
148-3286
148 days
24532 robertmaxton42
author:robertmaxton42
 feat(LinearAlgebra/FreeProduct): fill out the `FreeProduct.asPowers` namespace * Replicate the existing API for `LinearAlgebra.FreeProduct` under `FreeProduct.asPowers`, for convenience when working primarily with the power algebra representation * Adds convenience lemmas for using the corresponding quotient relation `rel'` (used in the above). --- - [x] depends on: #24531 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-algebra
label:t-algebra$
 122/5 Mathlib/LinearAlgebra/FreeProduct/Basic.lean 1 26 ['YaelDillies', 'adomani', 'github-actions', 'leanprover-community-bot-assistant', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot', 'robertmaxton42'] nobody
211-67704
6 months ago
376-55135
376 days ago
0-47665
13 hours
25692 Whysoserioushah
author:Whysoserioushah
 feat(RingTheory/MatrixAlgebra): add a more general version of `matrixEquivTensor` This adds `tensorMatrixLinearEquiv : A ⊗[R] Matrix n n B ≃ₐ[S] Matrix n n (A ⊗[R] B)` which is a more general version of `matrixEquivTensor : Matrix n n A ≃ₐ[R] (A ⊗[R] Matrix n n R)`. The latter is then implemented as a trivial consequence of the former. Many internal implementation details are deleted without deprecation, although strictly these were not private. Co-authored-by: @erdOne Co-authored-by: Eric Wieser --- - [ ] depends on: #28367 - [ ] depends on: #28359 - [ ] depends on: #28368 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict awaiting-author t-ring-theory 129/110 Mathlib/RingTheory/MatrixAlgebra.lean 1 28 ['Whysoserioushah', 'chrisflav', 'eric-wieser', 'github-actions', 'jcommelin', 'mathlib-bors', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot', 'mattrobball'] chrisflav
assignee:chrisflav
200-26153
6 months ago
276-49049
276 days ago
47-13209
47 days
25012 urkud
author:urkud
 refactor(*): migrate from `Matrix.toLin'` to `Matrix.mulVecLin` or `Matrix.mulVec` whenever we don't need the `LinearEquiv.symm` part. See [Zulip discussion](https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/Matrix.2EtoLin'.20vs.20Matrix.2EmulVecLin/with/515188548). It makes sense to have only one normal form, and `Matrix.toLin'` has an extra `DecidableEq` assumption. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict 165/126 Mathlib/Algebra/Lie/Matrix.lean,Mathlib/Algebra/Module/Equiv/Basic.lean,Mathlib/Analysis/CStarAlgebra/Matrix.lean,Mathlib/Analysis/Matrix.lean,Mathlib/Combinatorics/SimpleGraph/LapMatrix.lean,Mathlib/LinearAlgebra/Basis/Defs.lean,Mathlib/LinearAlgebra/Determinant.lean,Mathlib/LinearAlgebra/Finsupp/VectorSpace.lean,Mathlib/LinearAlgebra/Matrix/BilinearForm.lean,Mathlib/LinearAlgebra/Matrix/Charpoly/Minpoly.lean,Mathlib/LinearAlgebra/Matrix/Diagonal.lean,Mathlib/LinearAlgebra/Matrix/Gershgorin.lean,Mathlib/LinearAlgebra/Matrix/Rank.lean,Mathlib/LinearAlgebra/Matrix/SesquilinearForm.lean,Mathlib/LinearAlgebra/Matrix/SpecialLinearGroup.lean,Mathlib/LinearAlgebra/Matrix/ToLin.lean,Mathlib/LinearAlgebra/Matrix/ToLinearEquiv.lean,Mathlib/LinearAlgebra/UnitaryGroup.lean,Mathlib/MeasureTheory/Measure/Lebesgue/Basic.lean 19 4 ['github-actions', 'leanprover-community-bot-assistant', 'mathlib4-merge-conflict-bot'] nobody
200-8554
6 months ago
348-34032
348 days ago
14-81673
14 days
15651 TpmKranz
author:TpmKranz
 feat(Computability/NFA): operations for Thompson's construction Lays the groundwork for a proof of equivalence of RE and NFA, w.r.t. described language. Actual connection to REs comes later, after the groundwork for the opposite direction has been laid. Third chunk of #12648 --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor t-computability merge-conflict awaiting-author awaiting-zulip 307/5 Mathlib/Computability/NFA.lean 1 27 ['TpmKranz', 'YaelDillies', 'dupuisf', 'github-actions', 'leanprover-community-bot-assistant', 'meithecatte', 'rudynicolop'] nobody
185-84897
6 months ago
605-25885
605 days ago
45-84611
45 days
12032 mcdoll
author:mcdoll
 feat: delta distribution as a limit --- - [ ] depends on: #11496 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) WIP t-analysis 58/0 Mathlib/Analysis/Distribution/DiracDelta.lean 1 2 ['github-actions', 'mathlib4-dependent-issues-bot'] nobody
185-67871
6 months ago
773-26037
773 days ago
0-1
1 second
9693 madvorak
author:madvorak
 feat: Linear programming in the standard form --- Zulip discussion: https://leanprover.zulipchat.com/#narrow/stream/144837-PR-reviews/topic/.237386.20Linear.20Programming Four PRs incompatible with each other: https://github.com/leanprover-community/mathlib4/pull/7386 (list of constraints) https://github.com/leanprover-community/mathlib4/pull/9693 (matrix form) https://github.com/leanprover-community/mathlib4/pull/10026 (Antoine Chambert-Loir's def; semirings, linear) https://github.com/leanprover-community/mathlib4/pull/10159 (Antoine Chambert-Loir's def; rings, affine) - [x] depends on: #9652 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict WIP t-algebra RFC
label:t-algebra$
 86/0 Mathlib.lean,Mathlib/LinearAlgebra/Matrix/LinearProgramming.lean 2 15 ['apurvanakade', 'github-actions', 'leanprover-community-mathlib4-bot', 'madvorak', 'mathlib4-merge-conflict-bot'] nobody
185-32243
6 months ago
688-40235
688 days ago
168-78821
168 days
15649 TpmKranz
author:TpmKranz
 feat(Computability): introduce Generalised NFA as bridge to Regular Expression Lays the groundwork for a proof of equivalence of NFA and RE, w.r.t. described language. Actual connection to NFA comes later, after the groundwork for the opposite direction has been laid. Second chunk of #12648 --- - [x] depends on: #15647 [Data.FinEnum.Option unchanged since then] [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor t-computability merge-conflict awaiting-author awaiting-zulip 298/0 Mathlib.lean,Mathlib/Computability/GNFA.lean,Mathlib/Computability/Language.lean,Mathlib/Computability/RegularExpressions.lean,docs/references.bib 5 7 ['github-actions', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot', 'meithecatte', 'trivial1711'] nobody
185-14738
6 months ago
530-64668
530 days ago
23-54870
23 days
5745 alexjbest
author:alexjbest
 feat: a tactic to consume type annotations, and make constructor nicer During the copenhagen masterclass I found some situations where applying the constructor tactic left the goal in a difficult to read state when autoParams were present. We add a simple tactic to clean these up, and a macro for `constructor` to behave more like the constructor notation and do this automatically (constructor is in core) It seems that these things should be cleaned up by simp, but a simp lemma to remove these annotations is not accepted by lean as the types are too similar. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict awaiting-author t-meta 41/0 Mathlib.lean,Mathlib/Tactic.lean,Mathlib/Tactic/Consume.lean,test/consume.lean 4 5 ['alexjbest', 'digama0', 'kim-em', 'kmill', 'mathlib4-merge-conflict-bot'] nobody
184-52597
6 months ago
999-75459
999 days ago
51-33889
51 days
5863 eric-wieser
author:eric-wieser
 feat: add elaborators for concrete matrices --- - [x] depends on: #5866 - [ ] depends on: #5897 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict help-wanted blocked-by-other-PR t-meta 257/7 Mathlib/Control/Monad/Cont.lean,Mathlib/Data/Matrix/Auto.lean,MathlibTest/matrix_auto.lean 3 8 ['eric-wieser', 'github-actions', 'kim-em', 'leanprover-community-bot-assistant', 'mathlib4-merge-conflict-bot'] nobody
184-52596
6 months ago
1044-32257
1044 days ago
0-1
1 second
5919 MithicSpirit
author:MithicSpirit
 feat: implement orthogonality for AffineSubspace Define `AffineSubspace.orthogonal` and `AffineSubspace.IsOrtho`, as well as develop an API emulating that of `Submodule.orthogonal` and `Submodule.IsOrtho`, respectively. Additionally, provide some relevant lemmas exclusive to affine subspaces, which are mostly to do with the relationship between orthogonality and `AffineSubspace.Parallel`. Closes #5539 --- Still WIP as I need to add more docstrings as well as notations for the new definitions. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) WIP new-contributor merge-conflict help-wanted t-analysis 287/0 Mathlib.lean,Mathlib/Analysis/InnerProductSpace/AffineSubspace.lean 2 7 ['MithicSpirit', 'eric-wieser', 'github-actions', 'leanprover-community-bot-assistant', 'mathlib4-merge-conflict-bot'] MithicSpirit
assignee:MithicSpirit
184-52595
6 months ago
867-77490
867 days ago
0-433
7 minutes
7386 madvorak
author:madvorak
 feat: Define linear programs Linear programs over a general `Module` with constraints given in the form "aᵀx - b ≥ 0" and the objective function as an `AffineMap` to be minimized. --- Zulip discussion: https://leanprover.zulipchat.com/#narrow/stream/144837-PR-reviews/topic/.237386.20Linear.20Programming Four PRs incompatible with each other: https://github.com/leanprover-community/mathlib4/pull/7386 (list of constraints) https://github.com/leanprover-community/mathlib4/pull/9693 (matrix form) https://github.com/leanprover-community/mathlib4/pull/10026 (Antoine Chambert-Loir's def; semirings, linear) https://github.com/leanprover-community/mathlib4/pull/10159 (Antoine Chambert-Loir's def; rings, affine) [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict WIP t-algebra RFC
label:t-algebra$
 87/0 Mathlib.lean,Mathlib/LinearAlgebra/LinearProgramming.lean 2 64 ['Shreyas4991', 'YaelDillies', 'eric-wieser', 'github-actions', 'kim-em', 'madvorak', 'mathlib4-merge-conflict-bot'] nobody
184-52592
6 months ago
688-40223
688 days ago
232-74885
232 days
9352 chenyili0818
author:chenyili0818
 feat: arithmetic lemmas for `gradient` This file is based on Mathlib.Analysis.Calculus.Gradient.Basic, and describes the calculation properties Co-authored-by: Ziyu Wang [tropicalfish910@gmail.com](mailto:tropicalfish910@gmail.com) --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict awaiting-author t-analysis 404/0 Mathlib.lean,Mathlib/Analysis/Calculus/Gradient/Lemmas.lean 2 31 ['chenyili0818', 'github-actions', 'jcommelin', 'mathlib4-merge-conflict-bot', 'sgouezel', 'winstonyin'] nobody
184-52467
6 months ago
822-30916
822 days ago
52-1358
52 days
9795 sinhp
author:sinhp
 feat: the type `Fib` of fibre of a function at a point This is the most basic file of the theory of fibred categories developed here: https://github.com/sinhp/LeanFibredCategories/tree/master --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict awaiting-author t-category-theory 74/0 Mathlib.lean,Mathlib/Data/Fiber.lean 2 18 ['adri326', 'joelriou', 'mathlib4-merge-conflict-bot', 'sinhp'] nobody
184-52466
6 months ago
854-48637
854 days ago
2-35530
2 days
10660 eric-wieser
author:eric-wieser
 feat(LinearAlgebra/CliffordAlgebra): construction from a basis This is adapted from https://github.com/eric-wieser/lftcm2023-clifford_algebra, which only worked for the special case of `Q = 0`. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict WIP awaiting-author t-algebra
label:t-algebra$
 573/0 Mathlib.lean,Mathlib/LinearAlgebra/CliffordAlgebra/Basis.lean 2 16 ['github-actions', 'mathlib4-merge-conflict-bot'] nobody
184-52462
6 months ago
unknown
0-0
0 seconds
10977 grunweg
author:grunweg
 feat: germs of smooth functions Define the space of germs of smooth functions (between manifolds). Endow it with a ring structure if the target manifold is a smooth ring (e.g., a Lie group or a field). From the sphere eversion project, rewritten by me. Co-authored-by: Patrick Massot ------- Particular questions for review - is the authorship/copyright information appropriate? (`PatrickMassot` created the file `SmoothGerm` which I adapted; I didn't trace this far back through sphere-eversion.) - is providing all the intermediate algebraic structures (such as, an additive subgroup) on the space of smooth germs useful in practice? (The sphere eversion project only needs a ring structure.) - any further particular API lemmas (e.g., around coercions) which would be good to add? --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-differential-geometry merge-conflict awaiting-author t-topology t-analysis 150/0 Mathlib.lean,Mathlib/Geometry/Manifold/Algebra/SmoothGerm.lean 2 34 ['YaelDillies', 'github-actions', 'grunweg', 'jcommelin', 'kim-em', 'mathlib4-merge-conflict-bot', 'mcdoll'] fpvandoorn
assignee:fpvandoorn
184-52461
6 months ago
633-28096
633 days ago
144-63944
144 days
10998 hmonroe
author:hmonroe
 feat(Logic): Arithmetization of partial recursive functions (toward Gödel's first incompleteness theorem) --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict awaiting-author t-logic 364/0 Mathlib.lean,Mathlib/Logic/Godel/PartArith.lean 2 4 ['Ruben-VandeVelde', 'YaelDillies', 'mathlib4-merge-conflict-bot'] nobody
184-52460
6 months ago
715-20988
715 days ago
99-83915
99 days
11890 adomani
author:adomani
 feat: the terminal refine linter A linter that warns on usages of `refine` and `refine'` as a finishing tactic. See this [Zulip discussion](https://leanprover.zulipchat.com/#narrow/stream/287929-mathlib4/topic/Usage.20of.20refine'). ### Conclusion of the experiment Systematic replacements of terminal `refine` with `exact` leads to an overall slow-down. --- - [ ] depends on: #15616 (disable the linter in downstream projects) [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-linter awaiting-author 77/0 Mathlib.lean,Mathlib/Tactic.lean,Mathlib/Tactic/Linter/TerminalRefineLinter.lean 3 15 ['adomani', 'github-actions', 'grunweg', 'joneugster', 'leanprover-bot', 'leanprover-community-mathlib4-bot', 'mathlib4-merge-conflict-bot', 'urkud'] nobody
184-52336
6 months ago
647-442
647 days ago
18-28993
18 days
12006 adomani
author:adomani
 feat: the `suffa` tactic The `suffa` tactic. `suffa tac` runs the tactic sequence `tac` and returns a `Try this:` suggestion of the form `suffices [target_after_tac] by tac; assumption`. For example ```lean example {m n : Nat} (h : m = n) : 0 + m = n := by suffa rewrite [Nat.zero_add] assumption ``` suggests the replacement ```lean example {m n : Nat} (h : m = n) : 0 + m = n := by suffices m = n by rewrite [Nat.zero_add] assumption assumption ``` See [this thread](https://leanprover.zulipchat.com/#narrow/stream/113488-general/topic/Try.20this.3A.20suffices.20simpa) as well as [this message](https://leanprover.zulipchat.com/#narrow/stream/144837-PR-reviews/topic/.2311822.20flexible.20tactics.20linter/near/431895664). --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict awaiting-author t-meta 161/0 Mathlib.lean,Mathlib/Tactic.lean,Mathlib/Tactic/Suffa.lean,test/Suffa.lean 4 4 ['MoritzBeroRoos', 'YaelDillies', 'mathlib4-merge-conflict-bot'] nobody
184-52333
6 months ago
715-37711
715 days ago
59-762
59 days
13442 dignissimus
author:dignissimus
 feat: mabel tactic for multiplicative abelian groups Mabel tactic for multiplicative abelian groups (#10361) --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor merge-conflict modifies-tactic-syntax awaiting-author help-wanted t-meta 439/0 Mathlib.lean,Mathlib/Tactic.lean,Mathlib/Tactic/MAbel.lean,MathlibTest/mabel.lean 4 11 ['BoltonBailey', 'dignissimus', 'github-actions', 'joneugster', 'kbuzzard', 'mathlib4-merge-conflict-bot'] joneugster
assignee:joneugster
184-52331
6 months ago
634-44417
634 days ago
0-16
16 seconds
14237 js2357
author:js2357
 feat: Define the localization of a fractional ideal at a prime ideal Define the localization of a fractional ideal at a prime ideal, and prove some basic properties. --- This PR is part 3 out of 4 of a proof of `isDedekindDomain_iff_isDedekindDomainDvr`. Part 4 is available here: #14242 - [x] depends on: #14099 Part 1 - [x] depends on: #14216 Part 2 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict awaiting-author t-algebra new-contributor
label:t-algebra$
 230/0 Mathlib.lean,Mathlib/RingTheory/FractionalIdeal/LocalizedAtPrime.lean,Mathlib/RingTheory/Localization/Basic.lean 3 22 ['Vierkantor', 'YaelDillies', 'github-actions', 'js2357', 'kbuzzard', 'leanprover-community-bot-assistant', 'leanprover-community-mathlib4-bot', 'mathlib4-merge-conflict-bot'] Vierkantor
assignee:Vierkantor
184-52329
6 months ago
633-26152
633 days ago
6-3525
6 days
14345 digama0
author:digama0
 feat: the Dialectica category is monoidal closed - [x] depends on: #14274 The monoidal closed structure of the Dialectica category. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict awaiting-author t-category-theory 252/0 Mathlib.lean,Mathlib/CategoryTheory/Dialectica/Closed.lean 2 4 ['github-actions', 'kim-em', 'leanprover-community-mathlib4-bot', 'mathlib4-merge-conflict-bot'] nobody
184-52206
6 months ago
676-17760
676 days ago
12-20456
12 days
14727 jjaassoonn
author:jjaassoonn
 feat(RingTheory/Flat/CategoryTheory): a flat module has vanishing higher Tor groups [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict awaiting-author t-ring-theory 37/1 Mathlib/RingTheory/Flat/CategoryTheory.lean 1 4 ['github-actions', 'kim-em', 'mathlib4-merge-conflict-bot'] nobody
184-52204
6 months ago
673-86205
673 days ago
3-28223
3 days
14733 jjaassoonn
author:jjaassoonn
 feat(RingTheory/Flat/CategoryTheory): a module is flat iff tensoring preserves finite limits --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict awaiting-author t-ring-theory 99/1 Mathlib.lean,Mathlib/Algebra/Category/ModuleCat/Basic.lean,Mathlib/Algebra/Category/ModuleCat/Monoidal/RightExact.lean,Mathlib/RingTheory/Flat/CategoryTheory.lean 4 3 ['github-actions', 'kim-em', 'mathlib4-merge-conflict-bot'] nobody
184-52202
6 months ago
671-11666
671 days ago
6-6256
6 days
15055 sinhp
author:sinhp
 feat: the category of pointed objects of a concrete category This file defines the category of pointed objects of a concrete category. After this we will have the categories of pointed groups, pointed abelian groups, pointed groupoids, etc. To define `Pointed.functor`, we need to add the following "pullback" construction to the category of elements. ``` @[simps obj map] def pullback (F : D ⥤ Type w) (G : C ⥤ D) : (G ⋙ F).Elements ⥤ F.Elements where obj X := ⟨G.obj X.1, X.2⟩ map {X Y} f := ⟨G.map f.1, f.2⟩ ``` This is called pullback since the display map of `G ⋙ F` (i.e. `π (G ⋙ F)`) is a pullback of the display map of `F`. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict awaiting-author t-category-theory 185/0 Mathlib.lean,Mathlib/CategoryTheory/ConcreteCategory/Pointed.lean,Mathlib/CategoryTheory/Elements.lean 3 14 ['dagurtomas', 'github-actions', 'kim-em', 'mathlib4-merge-conflict-bot'] nobody
184-52201
6 months ago
660-37543
660 days ago
7-80557
7 days
15224 AnthonyBordg
author:AnthonyBordg
 feat(CategoryTheory/Sites): covering families and their associated Grothendieck topology Define covering families on a category and their associated Grothendieck topology by using the API for `Coverage`. Give an explicit characterization of the covering sieves of the said topology. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict awaiting-author t-category-theory new-contributor 112/0 Mathlib.lean,Mathlib/CategoryTheory/Sites/CoveringFamilies.lean 2 21 ['AnthonyBordg', 'adamtopaz', 'dagurtomas', 'github-actions', 'joelriou', 'mathlib4-merge-conflict-bot'] nobody
184-52200
6 months ago
660-18431
660 days ago
1-48443
1 day
16303 grunweg
author:grunweg
 feat(CI): check for badly formatted titles or missing/contradictory labels --- The zulip workflow is entirely cargo-culted from #16296; please review carefully. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict awaiting-author CI 325/0 .github/build.in.yml,Mathlib.lean,Mathlib/Tactic.lean,Mathlib/Tactic/Linter/ValidatePRTitle.lean,MathlibTest/ValidatePRTitle.lean,lakefile.lean,scripts/README.md,scripts/check-title-labels.lean 8 45 ['Command-Master', 'adomani', 'bryangingechen', 'edegeltje', 'github-actions', 'grunweg', 'joneugster', 'leanprover-community-bot-assistant', 'mathlib4-merge-conflict-bot'] bryangingechen
assignee:bryangingechen
184-52196
6 months ago
503-1289
503 days ago
78-4556
78 days
18236 joelriou
author:joelriou
 feat(Algebra/Category/ModuleCat/Presheaf): the endofunctor of presheaves of modules induced by an oplax natural transformation An endomorphism of ` ModuleCat.restrictScalarsPseudofunctor`, i.e. a "compatible" family of functors `ModuleCat A ⥤ ModuleCat A` for all (commutative) rings `A` induces a functor `PresheafOfModules R ⥤ PresheafOfModules R` for any presheaf of (commutative) rings `R`. In #18262, this is applied to the construction of exterior powers of a presheaves of modules. --- - [x] depends on: #18197 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) WIP t-algebra t-category-theory awaiting-CI merge-conflict awaiting-author
label:t-algebra$
 180/0 Mathlib.lean,Mathlib/Algebra/Category/ModuleCat/Presheaf/FunctorOfNatTrans.lean 2 6 ['github-actions', 'kim-em', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
184-52045
6 months ago
unknown
0-0
0 seconds
18749 GabinKolly
author:GabinKolly
 feat(ModelTheory): preparatory work for the existence of Fraïsse limits Define the map of a PartialEquiv through an embedding, and related properties. Define embeddings and equivalences between equal structures or equal substructures, and related properties. Add miscellaneous lemmas which will be used to prove the existence of fraisse limits. --- This is preparation for #18876 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict awaiting-author t-logic 308/5 Mathlib/ModelTheory/Bundled.lean,Mathlib/ModelTheory/DirectLimit.lean,Mathlib/ModelTheory/FinitelyGenerated.lean,Mathlib/ModelTheory/PartialEquiv.lean,Mathlib/ModelTheory/Substructures.lean 5 10 ['GabinKolly', 'YaelDillies', 'github-actions', 'mathlib4-merge-conflict-bot', 'vihdzp'] nobody
184-52042
6 months ago
487-14602
487 days ago
73-63475
73 days
18876 GabinKolly
author:GabinKolly
 feat(ModelTheory/Fraisse): add proof that Fraïssé limits exist Fraïssé limits exist. --- All the preparatory work done in other files is contained in the pull request #18749, this pull request adds the work done in ModelTheory/Fraisse, the definition of the sequence of structures whose limit will be the Fraïssé limit, lemmas about this sequence, and then the proof that the limit is indeed a Fraïssé limit. - [ ] depends on: #18749 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict blocked-by-other-PR t-logic 666/5 Mathlib/ModelTheory/Bundled.lean,Mathlib/ModelTheory/DirectLimit.lean,Mathlib/ModelTheory/FinitelyGenerated.lean,Mathlib/ModelTheory/Fraisse.lean,Mathlib/ModelTheory/PartialEquiv.lean,Mathlib/ModelTheory/Substructures.lean 6 3 ['github-actions', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
184-52040
6 months ago
557-23374
557 days ago
0-37
37 seconds
19323 madvorak
author:madvorak
 feat: Function to Sum decomposition --- Discussion: https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/Function.20to.20Sum.20decomposition merge-conflict WIP t-data 50/0 Mathlib.lean,Mathlib/Data/Sum/Decompose.lean 2 3 ['github-actions', 'madvorak', 'mathlib4-merge-conflict-bot'] nobody
184-52039
6 months ago
504-32272
504 days ago
43-18002
43 days
19378 adamtopaz
author:adamtopaz
 feat: Explanation widgets This adds some simple widgets, wrapped in a tactic, term and command elaborator, for displaying markdown explanations in the infoview. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict awaiting-author t-meta 101/0 Mathlib.lean,Mathlib/Tactic.lean,Mathlib/Tactic/Widget/Explain.lean 3 9 ['adamtopaz', 'eric-wieser', 'github-actions', 'joneugster', 'kmill', 'mathlib4-merge-conflict-bot'] nobody
184-52038
6 months ago
496-23009
496 days ago
49-76666
49 days
19456 AntoineChambert-Loir
author:AntoineChambert-Loir
 feat(Data/Finsupp/MonomialOrder/DegRevLex): homogeneous reverse lexicographic order Definition of the homogeneous reverse lexicographic order --- - [x] depends on: #19453 - [x] depends on: #19455 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) WIP t-order t-data merge-conflict t-algebraic-geometry 362/0 Mathlib.lean,Mathlib/Data/Finsupp/MonomialOrder/DegLex.lean,Mathlib/Data/Finsupp/MonomialOrder/DegRevLex.lean 3 3 ['github-actions', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
184-52037
6 months ago
543-43213
543 days ago
0-27
27 seconds
20051 Timeroot
author:Timeroot
 feat: `Clone` and some instances Defines clones (`Clone`). And there is a file, `Instances.lean`, that gives several most important examples of Clones. In particular, it has all of the clones (in an appropriately general form) that occur in [Post's Lattice](https://en.wikipedia.org/wiki/Post%27s_lattice), and [later proving](https://github.com/leanprover-community/mathlib4/pull/24744) the completeness of Post's Lattice is why I'm making this PR. (Edit: Used to also say "Defined operads (`Operad`), symmetric operads (`SymmOperad`), and clones ... There is a proof that all clones have a natural operad structure.". This has been scrapped.) --- - [x] depends on: #20133 [basics and notations] - [x] depends on: #20134 [permutations] - [x] depends on: #20138 [operad] - [x] depends on: #20141 [clone] - [x] depends on: #23459 [defs] - [ ] depends on: #23460 [basic] [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict awaiting-author t-algebra blocked-by-other-PR
label:t-algebra$
 623/0 Mathlib.lean,Mathlib/Algebra/Clone/Basic.lean,Mathlib/Algebra/Clone/Defs.lean,Mathlib/Algebra/Clone/Instances.lean,Mathlib/Data/Fin/Basic.lean 5 33 ['Timeroot', 'YaelDillies', 'eric-wieser', 'github-actions', 'jcommelin', 'kbuzzard', 'kim-em', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot', 'wmacmil'] nobody
184-51909
6 months ago
unknown
0-0
0 seconds
20466 MohanadAhmed
author:MohanadAhmed
 feat: Sherman Morrison formula for rank 1 update of the matrix inverse Provides the Sherman Morrison rank 1 update of the matrix inverse https://en.wikipedia.org/wiki/Sherman%E2%80%93Morrison_formula. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict awaiting-author t-data 37/0 Mathlib/Data/Matrix/Invertible.lean 1 5 ['eric-wieser', 'github-actions', 'mathlib4-merge-conflict-bot'] nobody
184-51907
6 months ago
480-25691
480 days ago
23-30652
23 days
20648 anthonyde
author:anthonyde
 feat: formalize regular expression -> εNFA The file `Computability/RegularExpressionsToEpsilonNFA.lean` contains a formal definition of Thompson's method for constructing an `εNFA` from a `RegularExpression` and a proof of its correctness. --- - [x] depends on: #20644 - [x] depends on: #20645 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-computability awaiting-zulip new-contributor 490/0 Mathlib.lean,Mathlib/Computability/RegularExpressionsToEpsilonNFA.lean,docs/references.bib 3 7 ['anthonyde', 'github-actions', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot', 'meithecatte', 'qawbecrdtey'] nobody
184-51906
6 months ago
381-84835
381 days ago
75-77754
75 days
20649 GabinKolly
author:GabinKolly
 feat(ModelTheory/Graph): prove characterization of the fraisse limit of finite simple graphs Prove that a countable graph with the extension property must be the Fraisse limit of finite simple graphs. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) WIP large-import merge-conflict t-combinatorics t-logic 175/0 Mathlib/ModelTheory/Graph.lean,Mathlib/ModelTheory/Substructures.lean 2 2 ['github-actions', 'mathlib4-merge-conflict-bot'] nobody
184-51904
6 months ago
unknown
0-0
0 seconds
20652 jjaassoonn
author:jjaassoonn
 feat: categorical description of center of a ring We show the isomorphism between `Z(R)` and `End(1 Mod-R)` --- - [x] depends on:#20721 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict awaiting-author t-algebra t-category-theory
label:t-algebra$
 212/21 Mathlib.lean,Mathlib/Algebra/Category/ModuleCat/ChangeOfRings.lean,Mathlib/Algebra/Category/Ring/Center.lean,Mathlib/CategoryTheory/Conj.lean,Mathlib/CategoryTheory/Endomorphism.lean,Mathlib/CategoryTheory/Preadditive/AdditiveFunctor.lean,Mathlib/CategoryTheory/Preadditive/Basic.lean 7 42 ['alreadydone', 'github-actions', 'jcommelin', 'jjaassoonn', 'kbuzzard', 'mathlib4-merge-conflict-bot', 'qawbecrdtey'] nobody
184-51903
6 months ago
472-49333
472 days ago
5-77051
5 days
20924 tomaz1502
author:tomaz1502
 feat(Computability/QueryComplexity): Oracle-based computation This PR adds the types and lemmas for oracle-based computation. In this model, computations are run on a monad which also counts the number of oracle queries executed. With it, it becomes possible to reason about the upper bound of the query complexity of algorithms. In the future, we could extend this work to include the necessary bits from information theory and probability to also reason about lower bounds on query complexity, like the work in https://github.com/girving/debate. Zulip discussion: https://leanprover.zulipchat.com/#narrow/channel/144837-PR-reviews/topic/.2318629.20runtime.20complexity.20of.20sorting.20a.20list Co-authored-by: Geoffrey Irving --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-computability 305/0 Mathlib.lean,Mathlib/Computability/QueryComplexity/Basic.lean,Mathlib/Computability/QueryComplexity/Defs.lean 3 60 ['eric-wieser', 'girving', 'github-actions', 'mathlib4-merge-conflict-bot', 'quangvdao', 'tomaz1502'] nobody
184-51902
6 months ago
453-73197
453 days ago
27-32630
27 days
20956 tomaz1502
author:tomaz1502
 feat(Computability/QueryComplexity/Sort.lean): Formalization of upper bound of queries for merge sort This PR builds on top of #20924 to prove that merge sort (as defined in Lean's library) never executes more than `3 * n * ceil_log2 n` comparisons, where `n` is the size of the input list and `ceil_log2` is the ceil of the logarithm in base 2, which is defined in this PR. Zulip discussion: https://leanprover.zulipchat.com/#narrow/channel/144837-PR-reviews/topic/.2318629.20runtime.20complexity.20of.20sorting.20a.20list - [ ] depends on: #20924 Co-authored-by: Geoffrey Irving --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-computability blocked-by-other-PR 676/0 Mathlib.lean,Mathlib/Computability/QueryComplexity/Basic.lean,Mathlib/Computability/QueryComplexity/Defs.lean,Mathlib/Computability/QueryComplexity/Sort.lean 4 4 ['github-actions', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
184-51900
6 months ago
485-20461
485 days ago
0-41
41 seconds
21270 GabinKolly
author:GabinKolly
 feat(ModelTheory/Bundled): first-order embeddings and equivalences from equalities Add first-order embeddings and equivalences from equalities between bundled structures. --- Add two definitions to get embeddings and equivalences from equalities between bundled structures, and simple properties. This is some preparatory work for #18876 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict awaiting-author large-import t-logic 102/0 Mathlib/ModelTheory/Bundled.lean 1 27 ['GabinKolly', 'Vierkantor', 'YaelDillies', 'github-actions', 'mathlib4-merge-conflict-bot'] nobody
184-51898
6 months ago
403-53711
403 days ago
50-58472
50 days
21277 GabinKolly
author:GabinKolly
 feat(ModelTheory/PartialEquiv): Define the mapping of a self-partialEquiv through an embedding Define the mapping of a self-partialEquiv through an embedding and the notion of fully extendable partialEquiv. --- This is some preparatory work for #18876 - [ ] depends on: #21276 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict blocked-by-other-PR t-logic 215/5 Mathlib/ModelTheory/PartialEquiv.lean,Mathlib/ModelTheory/Substructures.lean 2 3 ['github-actions', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
184-51896
6 months ago
477-1874
477 days ago
0-668
11 minutes
21616 peabrainiac
author:peabrainiac
 feat(Topology): concatenating countably many paths Adds `Path.countableConcat`, the concatenation of a sequence of paths leading up to some point `x`. --- - [x] depends on: #21591 - [x] depends on: #21607 This work is a prerequisite to #20248, where it is used to show that the topology of first-countable locally path-connected spaces is coinduced by all the paths in that space. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict awaiting-author t-topology 229/0 Mathlib.lean,Mathlib/Topology/Path/CountableConcat.lean 2 31 ['YaelDillies', 'github-actions', 'kim-em', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot', 'peabrainiac'] nobody
184-51893
6 months ago
397-51274
397 days ago
56-56728
56 days
21624 sinhp
author:sinhp
 feat(CategoryTheory): The (closed) monoidal structure on the product category of families of (closed) monoidal categories Given a family of closed monoidal categories, we show that the product of these categories is a closed monoidal category with the pointwise monoidal structure. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict awaiting-author t-category-theory 144/0 Mathlib.lean,Mathlib/CategoryTheory/Pi/Basic.lean,Mathlib/CategoryTheory/Pi/Monoidal.lean,Mathlib/CategoryTheory/Pi/MonoidalClosed.lean 4 20 ['TwoFX', 'YaelDillies', 'b-mehta', 'github-actions', 'jcommelin', 'mathlib4-merge-conflict-bot', 'sinhp'] nobody
184-51892
6 months ago
409-66134
409 days ago
50-48893
50 days
21829 Whysoserioushah
author:Whysoserioushah
 feat(LinearAlgebra/TensorProduct/HomTensor): Add TensorProduct of Hom-modules Co-authored-by: Andrew Yang --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict awaiting-author t-algebra
label:t-algebra$
 174/0 Mathlib.lean,Mathlib/LinearAlgebra/TensorProduct/HomTensor.lean 2 27 ['Whysoserioushah', 'YaelDillies', 'erdOne', 'github-actions', 'kbuzzard', 'mathlib4-merge-conflict-bot'] nobody
184-51890
6 months ago
416-46565
416 days ago
46-53039
46 days
21903 yhtq
author:yhtq
 feat: add from/toList between `FreeSemigroup` and `List` with relative theorems Add from/toList between `FreeSemigroup` and `List` with relative theorems, as well as an incidental definition of lexicographic order on `FreeSemigroup`. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra new-contributor awaiting-CI large-import merge-conflict
label:t-algebra$
 169/0 Mathlib/Algebra/Free.lean 1 12 ['YaelDillies', 'github-actions', 'mathlib4-merge-conflict-bot'] nobody
184-51766
6 months ago
411-35721
411 days ago
50-9294
50 days
22159 shetzl
author:shetzl
 feat: add definition of pushdown automata Add the definition of pushdown automata and their two acceptance conditions: acceptance based on empty stack and acceptance based on final state. Co-authored-by: Tobias Leichtfried --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-computability awaiting-author new-contributor 70/0 Mathlib.lean,Mathlib/Computability/PDA.lean 2 35 ['YaelDillies', 'github-actions', 'madvorak', 'mathlib4-merge-conflict-bot', 'shetzl'] nobody
184-51760
6 months ago
431-45773
431 days ago
20-81245
20 days
22231 pechersky
author:pechersky
 feat(Algebra/Valued): `AdicExpansion` initial defns --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-algebra awaiting-author t-topology
label:t-algebra$
 299/0 Mathlib.lean,Mathlib/Topology/Algebra/Valued/AdicExpansion.lean 2 8 ['Thmoas-Guan', 'github-actions', 'grunweg', 'jcommelin', 'mathlib4-merge-conflict-bot'] jcommelin
assignee:jcommelin
184-51756
6 months ago
263-35037
263 days ago
158-37126
158 days
22232 pechersky
author:pechersky
 feat(Algebra/Valued): `AdicExpansion.apprUpto` --- - [ ] depends on: #22231 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-topology blocked-by-other-PR 399/0 Mathlib.lean,Mathlib/Topology/Algebra/Valued/AdicExpansion.lean 2 3 ['github-actions', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
184-51754
6 months ago
452-68047
452 days ago
0-414
6 minutes
22233 pechersky
author:pechersky
 feat(Algebra/Valued): `AdicExpansion.evalAt` --- - [ ] depends on: #22231 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-topology blocked-by-other-PR 488/0 Mathlib.lean,Mathlib/Topology/Algebra/Valued/AdicExpansion.lean 2 3 ['github-actions', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
184-51753
6 months ago
452-68048
452 days ago
0-412
6 minutes
22302 658060
author:658060
 feat: add `CategoryTheory.Topos.Power` This is a continuation of #21281 with the end goal of defining topoi in Mathlib. It introduces the notion of a power object in a category with a subobject classifier, which is a special case of an internal hom. The definition `HasPowerObjects C` contained in this PR is all that remains before `IsTopos C` can be defined. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict awaiting-author t-category-theory new-contributor 312/0 Mathlib.lean,Mathlib/CategoryTheory/Topos/Power.lean 2 3 ['github-actions', 'joelriou', 'mathlib4-merge-conflict-bot'] b-mehta
assignee:b-mehta
184-51751
6 months ago
450-85753
450 days ago
0-1528
25 minutes
22662 plp127
author:plp127
 feat: Localization.Away.lift (computably) This PR adds `Localization.Away.lift'` and `Localization.Away.lift`, computable alternatives to `Localization.awayLift`. --- - [x] depends on: #24791 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-algebra
label:t-algebra$
 74/0 Mathlib/RingTheory/Localization/Away/Basic.lean 1 18 ['eric-wieser', 'github-actions', 'grunweg', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot', 'plp127', 'vihdzp'] kim-em
assignee:kim-em
184-51744
6 months ago
184-51745
184 days ago
257-28368
257 days
22790 mhk119
author:mhk119
 feat: Extend `taylor_mean_remainder_lagrange` to `x < x_0` The `taylor_mean_remainder_lagrange` theorem has the assumption that $x_0 < x$. In many applications, we need $x < x_0$ and one cannot use the current version to obtain this (see [zulip](https://leanprover.zulipchat.com/#narrow/channel/116395-maths/topic/Taylor's.20theorem)). This PR introduces a set of theorems that push negations through Taylor expansions so that one can extend `taylor_mean_remainder_lagrange` to the case when $x < x_0$. These theorems should also be useful elsewhere since they are quite general. merge-conflict awaiting-author t-analysis new-contributor 111/1 Mathlib/Analysis/Calculus/Deriv/Basic.lean,Mathlib/Analysis/Calculus/IteratedDeriv/Lemmas.lean,Mathlib/Analysis/Calculus/Taylor.lean 3 13 ['Paul-Lez', 'github-actions', 'grunweg', 'mathlib4-merge-conflict-bot', 'mhk119'] nobody
184-51738
6 months ago
412-66855
412 days ago
23-16830
23 days
22861 eric-wieser
author:eric-wieser
 feat: add the trace of a bilinear form Following the steps at [#Is there code for X? > Laplacian @ 💬](https://leanprover.zulipchat.com/#narrow/channel/217875-Is-there-code-for-X.3F/topic/Laplacian/near/450834505). --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) Some questions: * Does this generalize to multilinear maps? * Is there an `RCLike` generalization? * Does this generalize to `BilinMap` instead of just `BilinForm`? Perhaps the approach in [#mathlib4 > Stating Schrodinger's equation @ 💬](https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/Stating.20Schrodinger's.20equation/near/500409890) of using `ContinuousLinearMap.adjoint'` is better. merge-conflict awaiting-author t-algebra
label:t-algebra$
 100/0 Mathlib.lean,Mathlib/LinearAlgebra/BilinearForm/Trace.lean 2 4 ['github-actions', 'jcommelin', 'mathlib4-merge-conflict-bot'] nobody
184-51736
6 months ago
413-29884
413 days ago
23-44995
23 days
22919 plp127
author:plp127
 feat(Data/Fintype/Pi): Make `Fintype` instance for `RelHom`s computable Makes the `Fintype` instance for rel homs computable. See this [Zulip](https://leanprover.zulipchat.com/#narrow/channel/113489-new-members/topic/Classical.20vs.20constructive.20logic.20in.20computation/near/496220816) message. --- - [x] depends on: #24748 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict awaiting-author t-data 178/44 Mathlib/Combinatorics/SimpleGraph/Basic.lean,Mathlib/Combinatorics/SimpleGraph/Coloring.lean,Mathlib/Combinatorics/SimpleGraph/Maps.lean,Mathlib/Data/Fintype/CardEmbedding.lean,Mathlib/Data/Fintype/Pi.lean 5 31 ['IvanRenison', 'b-mehta', 'eric-wieser', 'fpvandoorn', 'github-actions', 'leanprover-community-bot-assistant', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot', 'plp127'] b-mehta
assignee:b-mehta
184-51734
6 months ago
358-65005
358 days ago
71-41637
71 days
22954 eric-wieser
author:eric-wieser
 feat(RingTheory/Congruence/Hom): copy from GroupTheory This was motivated in review of #22355, but I no longer recall why. It also helps with #29357. Either way, this captures a definition that was inlined in a later file. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-ring-theory 214/16 Mathlib/Algebra/RingQuot.lean,Mathlib/GroupTheory/Congruence/Hom.lean,Mathlib/RingTheory/Congruence/Defs.lean,Mathlib/RingTheory/Congruence/Hom.lean,Mathlib/RingTheory/TwoSidedIdeal/Kernel.lean 5 3 ['github-actions', 'leanprover-community-bot-assistant', 'mathlib4-merge-conflict-bot'] nobody
184-51733
6 months ago
433-33447
433 days ago
0-135
2 minutes
23285 AntoineChambert-Loir
author:AntoineChambert-Loir
 refactor: directed systems in terms of functors This is a WIP aiming to refactor the work on directed systems using the category theory library. But there are universes nightmares. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) WIP t-algebra t-category-theory large-import merge-conflict
label:t-algebra$
 111/45 Mathlib/Order/DirectedInverseSystem.lean 1 2 ['github-actions', 'mathlib4-merge-conflict-bot'] nobody
184-51727
6 months ago
423-83855
423 days ago
0-24
24 seconds
23460 Timeroot
author:Timeroot
 feat: Definition of `Clone` Basics about Clones. Part of #20051 --- - [ ] depends on: #26329 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-algebra blocked-by-other-PR
label:t-algebra$
 326/0 Mathlib.lean,Mathlib/Algebra/Clone/Basic.lean,Mathlib/Algebra/Clone/Defs.lean,Mathlib/Data/Fin/Basic.lean 4 3 ['github-actions', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
184-51725
6 months ago
267-14097
267 days ago
65-54502
65 days
23503 apnelson1
author:apnelson1
 feat(Topology/Instances/ENat): ENat and tsum We give API for the interactions between `tsum` and `ENat`. The type is especially nice, because every function is summable, and there are simplifying lemmas like the statement that a sum is infinite iff either some term is infinite, or the support is infinite. This provides one of the missing pieces for working painlessly with discrete objects, 'propositional' finiteness and cardinality. For instance, one can sum a function `f : a -> ENat` over an arbitrary set with the term `∑' a : s, 1`, and it will be provable that `∑' a : s, 1 = s.encard` and `(support f).encard ≤ ∑' a, f a` without ever having to split into finite/infinite cases. As is pointed out in the module docstring for `Data.ENat`, there are strong analogies between `ENat` and `ENNReal`, and the API runs parallel to the API for `tsum`/`ENNReal`. One could call it 'duplication', but I have yet to find a common generalization of the two that saves work, or a third example of a natural type with these same properties. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict WIP t-topology large-import 205/2 Mathlib/Data/ENat/Basic.lean,Mathlib/Data/Set/Card.lean,Mathlib/Topology/Instances/ENat.lean 3 3 ['eric-wieser', 'github-actions', 'mathlib4-merge-conflict-bot'] nobody
184-51723
6 months ago
403-6276
403 days ago
14-6036
14 days
23585 plp127
author:plp127
 feat: `Filter.atMax` and `Filter.atMin` Adds `atMax` and `atMin`, filters. Making an analogy, `atMax` : `atTop` :: `IsMax` : `IsTop`. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict WIP t-order 148/0 Mathlib.lean,Mathlib/Order/Filter/AtMaxMin.lean 2 5 ['github-actions', 'mathlib4-merge-conflict-bot', 'plp127', 'urkud'] nobody
184-51722
6 months ago
unknown
0-0
0 seconds
23758 erdOne
author:erdOne
 feat(Topology/Algebra): linearly topologized iff non-archimedean ...for topological modules over compact rings or `ℤ`-finite rings --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra large-import merge-conflict awaiting-author t-topology
label:t-algebra$
 138/3 Mathlib/LinearAlgebra/Span/Basic.lean,Mathlib/Topology/Algebra/LinearTopology.lean 2 22 ['ADedecker', 'AntoineChambert-Loir', 'erdOne', 'github-actions', 'grunweg', 'mathlib4-merge-conflict-bot'] ADedecker and AntoineChambert-Loir
assignee:AntoineChambert-Loir assignee:ADedecker
184-51720
6 months ago
285-62585
285 days ago
124-78308
124 days
24333 xcloudyunx
author:xcloudyunx
 feat(Combinatorics/SimpleGraph): cycle graph implementation for generic vertex types The existing `cycleGraph` implementation under Combinatorics/SimpleGraph/Circulant.lean only operates over `Fin n`. This PR implements a cycle graph implementation over any generic vertex type. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict awaiting-author t-combinatorics new-contributor 187/0 Mathlib.lean,Mathlib/Combinatorics/SimpleGraph/Cycle.lean 2 42 ['IvanRenison', 'github-actions', 'mathlib4-merge-conflict-bot', 'vlad902'] kmill
assignee:kmill
184-51585
6 months ago
270-50166
270 days ago
123-18878
123 days
24540 robertmaxton42
author:robertmaxton42
 feat(Quiv): add the empty, vertex, point, interval, and walking quivers Add: * The empty quiver * The vertex quiver (one vertex, and no edges) and the point quiver (one vertex, one self-edge) * The interval quiver (two vertices with an edge between them) * The walking quiver (vertices `0` and `1` with two edges both `0 -> 1`. Functors from the walking quiver to `Type` define quivers, by interpreting `F.obj 0` as the type of vertices, `F.obj 1` as the type of edges, using one of the two edges to label the source of every edge and using the other to label the target.) - [x] depends on: #24538 --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict awaiting-author t-category-theory 370/0 Mathlib.lean,Mathlib/CategoryTheory/Category/Quiv/Shapes.lean,Mathlib/CategoryTheory/Category/Quiv/WalkingQuiver.lean,Mathlib/Logic/Small/Defs.lean 4 14 ['github-actions', 'joelriou', 'leanprover-community-bot-assistant', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot', 'robertmaxton42', 'robin-carlier'] nobody
184-51580
6 months ago
378-83161
378 days ago
0-6849
1 hour
24850 pechersky
author:pechersky
 feat(Topology/UniformSpace/Ultra): uniform spaces induced by pseudometrics are ultra if system is ultra Any uniform space has a natural system of pseudometrics definable on it, comprised of those pseudometrics constructed from a descending chain of equivalence relation entourages. In a nonarchimedean uniformity, this pseudometric system induces the uniformity. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) - [x] depends on: #23111 merge-conflict t-topology 509/1 Mathlib.lean,Mathlib/Topology/MetricSpace/BundledFun.lean,Mathlib/Topology/UniformSpace/Ultra/Pseudometrizable.lean 3 9 ['ADedecker', 'fpvandoorn', 'github-actions', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot', 'pechersky'] urkud
assignee:urkud
184-51572
6 months ago
184-51573
184 days ago
177-43034
177 days
25324 eric-wieser
author:eric-wieser
 feat: more functorial results about DFinsupp We have these already for Finsupp. The `DFinsupp` statements need some extra casts in some places. --- - [ ] depends on: #27182 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) [#mathlib4 > Equiv.cast for structures @ 💬](https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/Equiv.2Ecast.20for.20structures/near/521390935) merge-conflict awaiting-author t-algebra t-data
label:t-algebra$
 137/16 Mathlib/Data/DFinsupp/Defs.lean,Mathlib/LinearAlgebra/DFinsupp.lean 2 13 ['github-actions', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot', 'pechersky'] pechersky
assignee:pechersky
184-51567
6 months ago
234-71838
234 days ago
19-26510
19 days
25585 Paul-Lez
author:Paul-Lez
 feat(Tactic/Linters/DeprecatedSimpLemma): lint for deprecated simp lemmas The deprecated simp lemma linter flags declarations that have both the `deprecated` and `simp` attributes. See Zulip discussion: [#mathlib4 > Help with Mathlib.Order.Interval.Finset.Defs @ 💬](https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/Help.20with.20Mathlib.2EOrder.2EInterval.2EFinset.2EDefs/near/505994843) --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-linter awaiting-author 105/0 Mathlib.lean,Mathlib/Tactic.lean,Mathlib/Tactic/Linter/DeprecatedSimpLemma.lean,MathlibTest/DeprecatedSimpLemmaTest.lean 4 8 ['adomani', 'github-actions', 'grunweg', 'mathlib4-merge-conflict-bot'] nobody
184-51440
6 months ago
348-37135
348 days ago
0-87
1 minute
26648 eric-wieser
author:eric-wieser
 chore(TensorProduct): remove more `suppress_compilation`s --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict blocked-by-core-PR t-algebra
label:t-algebra$
 3/7 Mathlib/LinearAlgebra/CliffordAlgebra/Prod.lean,Mathlib/LinearAlgebra/TensorProduct/Graded/External.lean,Mathlib/LinearAlgebra/TensorProduct/Graded/Internal.lean 3 5 ['eric-wieser', 'github-actions', 'leanprover-bot', 'mathlib4-merge-conflict-bot'] nobody
184-51073
6 months ago
320-53108
320 days ago
3-19989
3 days
28316 eric-wieser
author:eric-wieser
 feat(Tactic/NormNum): better trace nodes Comparing the infoview on the first example in the test file | Before | After | |---|---| | image | image| In the after version, the extension names are all clickable. Similar to #21450. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-meta 136/5 Mathlib.lean,Mathlib/Tactic/NormNum/Core.lean,Mathlib/Util/Trace.lean,MathlibTest/norm_num_trace.lean 4 20 ['JovanGerb', 'eric-wieser', 'github-actions', 'kmill', 'leanprover-bot', 'mathlib-bors', 'mathlib4-merge-conflict-bot', 'plp127'] JovanGerb
assignee:JovanGerb
184-50739
6 months ago
267-7626
267 days ago
15-76174
15 days
6268 eric-wieser
author:eric-wieser
 fix: fixups to #3838 This is an attempt to make #3838 universe polymorphic --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) * Depends on #6271 * Depends on #8876 merge-conflict WIP 186/107 Mathlib/Control/Random.lean,Mathlib/Tactic/SlimCheck.lean,Mathlib/Testing/SlimCheck/Functions.lean,Mathlib/Testing/SlimCheck/Gen.lean,Mathlib/Testing/SlimCheck/Sampleable.lean,Mathlib/Testing/SlimCheck/Testable.lean,test/slim_check.lean 7 10 ['github-actions', 'kim-em'] nobody
184-23916
6 months ago
unknown
0-0
0 seconds
6859 MohanadAhmed
author:MohanadAhmed
 feat: TryLean4Bundle: Windows Bundle Creator # `TryLean4Bundle`: Windows Bundle Creator A Windows batch script and a CI yml file that create an self extracting archive. The user should 1. just download the archive, 2. double click the archive to expand 3. double click the `RunLean.bat` script in the expanded archive. The script currently downloads 7 dependencies into CI then unpacks them in the appropriate locations and finally packs them back. To try a bundle created using these scripts but from a different repo see (https://github.com/MohanadAhmed/TryLean4Bundle/releases) --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) WIP help-wanted CI 114/0 .github/workflows/mk_windows_bundle.yml,scripts/windowsBundle.bat 2 0 [] nobody
184-23908
6 months ago
996-79021
996 days ago
0-434
7 minutes
6993 jjaassoonn
author:jjaassoonn
 feat: lemmas about `AddMonoidAlgebra.{divOf, modOf}` --- - [x] depends on: #7582 - [x] depends on: #8975 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-algebra
label:t-algebra$
 147/3 Mathlib/Algebra/MonoidAlgebra/Division.lean,Mathlib/Data/Finsupp/Basic.lean,Mathlib/Data/MvPolynomial/Basic.lean,Mathlib/Data/MvPolynomial/CommRing.lean,Mathlib/Data/MvPolynomial/Division.lean 5 42 ['YaelDillies', 'alreadydone', 'digama0', 'eric-wieser', 'github-actions', 'jjaassoonn', 'leanprover-community-mathlib4-bot'] nobody
184-23903
6 months ago
854-28656
854 days ago
103-330
103 days
7427 MohanadAhmed
author:MohanadAhmed
 feat: eigenvalues sorted in ascending/descending order In the file `Analysis.InnerProductSpace.Spectrum` todo notes were left saying: > TODO Postcompose with a permutation so that these eigenvectors are listed in increasing order of eigenvalue. > TODO Postcompose with a permutation so that these eigenvalues are listed in increasing order. - This is a start in that direction --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict WIP 162/4 Mathlib/Analysis/InnerProductSpace/Spectrum.lean,Mathlib/Analysis/NormedSpace/PiLp.lean,Mathlib/LinearAlgebra/Matrix/Spectrum.lean 3 0 [] nobody
184-23871
6 months ago
unknown
0-0
0 seconds
9339 FMLJohn
author:FMLJohn
 feat(RingTheory/GradedAlgebra/HomogeneousIdeal): given a finitely generated homogeneous ideal of a graded semiring, construct a finite spanning set for the ideal which only contains homogeneous elements --- - [ ] depends on: #8187 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-ring-theory 402/4 Mathlib.lean,Mathlib/Algebra/DirectSum/Internal.lean,Mathlib/Algebra/GradedMonoid.lean,Mathlib/Algebra/Module/GradeZeroModule.lean,Mathlib/RingTheory/Finiteness.lean,Mathlib/RingTheory/GradedAlgebra/Basic.lean,Mathlib/RingTheory/GradedAlgebra/HomogeneousIdeal.lean,Mathlib/RingTheory/GradedAlgebra/Noetherian.lean 8 11 ['FMLJohn', 'github-actions', 'jjaassoonn', 'leanprover-community-mathlib4-bot'] nobody
184-23856
6 months ago
868-28834
868 days ago
6-63597
6 days
9564 AntoineChambert-Loir
author:AntoineChambert-Loir
 chore: weaken commutativity assumptions for AdjoinRoot.lift and AdjoinRoot.liftHom I weaken a commutativity assumption for docs#AdjoinRoot.liftHom that the target algebra be commutative. It is only assumed to be a Semiring. For that, I need to generalize docs#AdjoinRoot.lift which takes `i : R ->+* S`, `a : S` with `f.eval₂ i a = 0` and defines `AdjoinRoot f ->+* S` that extends `i ` and sends `AdjoinRoot.root f` to `a`. --- The initial version of the PR was to define `AdjoinRoot.lift'` where `S` is only a Semiring, with the additional assumption `hcomm : ∀ r, Commute (i r) a` that the element `a` commutes with the image of `i`. @jcommelin suggested to provide this argument as an `autoParam`, filled in by an ad hoc `commutativity` tactic. However, such an argument cannot be made implicit and a first version required to have this argument given each time, most of the time by `_`, even for all subsequent lemmas, `AdjoinRoot.lift_mk`, etc. To avoid this, I tried to make this assumption a `⦃hcomm : ∀ r, Commute (i r) a⦄`. This appears to have some side effects that proofs using an `exact` tactic or in term mode do not work well, but one can resort on `by simp […]`. Maybe @eric-wieser or @Vierkantor will have opinions on that. In some cases one can still give the argument as `(hcomm := by commutativity)`. (There are 3 options : - separate lemmas for the fully commutative case and for the case where a proof is needed - using the `commutativity` tactic, but with an argument `_` sometimes - using the optional argument.) [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict WIP t-algebra
label:t-algebra$
 146/30 Mathlib.lean,Mathlib/Algebra/Algebra/Basic.lean,Mathlib/Algebra/Algebra/Hom.lean,Mathlib/Algebra/Group/Commute/Defs.lean,Mathlib/RingTheory/AdjoinRoot.lean,Mathlib/Tactic.lean,Mathlib/Tactic/Commutativity.lean,Mathlib/Tactic/Commutativity/Init.lean 8 14 ['AntoineChambert-Loir', 'Vierkantor', 'eric-wieser', 'jcommelin'] nobody
184-23850
6 months ago
781-16156
781 days ago
16-71959
16 days
10026 madvorak
author:madvorak
 feat: linear programming according to Antoine Chambert-Loir's book --- Zulip discussion: https://leanprover.zulipchat.com/#narrow/stream/144837-PR-reviews/topic/.237386.20Linear.20Programming Four PRs incompatible with each other: https://github.com/leanprover-community/mathlib4/pull/7386 (list of constraints) https://github.com/leanprover-community/mathlib4/pull/9693 (matrix form) https://github.com/leanprover-community/mathlib4/pull/10026 (Antoine Chambert-Loir's def; semirings, linear) https://github.com/leanprover-community/mathlib4/pull/10159 (Antoine Chambert-Loir's def; rings, affine) [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict WIP t-algebra RFC
label:t-algebra$
 86/0 Mathlib.lean,Mathlib/LinearAlgebra/LinearProgramming.lean 2 10 ['eric-wieser', 'madvorak', 'mathlib4-merge-conflict-bot', 'riccardobrasca'] nobody
184-23844
6 months ago
688-46653
688 days ago
154-48765
154 days
10159 madvorak
author:madvorak
 feat: linear programming according to Antoine Chambert-Loir's book — affine version --- Zulip discussion: https://leanprover.zulipchat.com/#narrow/stream/144837-PR-reviews/topic/.237386.20Linear.20Programming Four PRs incompatible with each other: https://github.com/leanprover-community/mathlib4/pull/7386 (list of constraints) https://github.com/leanprover-community/mathlib4/pull/9693 (matrix form) https://github.com/leanprover-community/mathlib4/pull/10026 (Antoine Chambert-Loir's def; semirings, linear) https://github.com/leanprover-community/mathlib4/pull/10159 (Antoine Chambert-Loir's def; rings, affine) [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict WIP t-algebra RFC
label:t-algebra$
 83/0 Mathlib.lean,Mathlib/LinearAlgebra/LinearProgramming.lean 2 8 ['eric-wieser', 'madvorak', 'mathlib4-merge-conflict-bot', 'riccardobrasca'] nobody
184-23837
6 months ago
688-46636
688 days ago
152-72231
152 days
10349 Shamrock-Frost
author:Shamrock-Frost
 refactor(CategoryTheory/MorphismProperty): some clean-ups We make explicit some of the galois connections/closure operators in the existing MorphismProperty file, rewrite some proofs to take advantage of these structures, and change map/inverseImage by (1) swapping their argument order, for consistency with Set.range and Set.preimage and (2) making "map" perform the strict, evil map while "essMap" (previously called map) forms the closure of the image under isomorphisms. Finally we add `IsMultiplicative` instances for isos/epis/monos, with an eye towards constructing the wide subcategory on these classes of maps. --- - [x] depends on: #10347 - [x] depends on: #10348 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-category-theory 474/318 Mathlib/CategoryTheory/Localization/Composition.lean,Mathlib/CategoryTheory/Localization/LocalizerMorphism.lean,Mathlib/CategoryTheory/MorphismProperty.lean,Mathlib/Data/Set/Lattice.lean,Mathlib/Order/Closure.lean,Mathlib/Order/Hom/Basic.lean,Mathlib/Order/Hom/CompleteLattice.lean,Mathlib/Order/RelIso/Basic.lean 8 1 ['leanprover-community-mathlib4-bot'] nobody
184-23814
6 months ago
834-78958
834 days ago
0-418
6 minutes
11021 jstoobysmith
author:jstoobysmith
 feat(AlgebraicTopology): add join of augmented SSets This pull-request adds the definition of the join of augmented SSets defined as contravariant functors from `WithInitial SimplexCategory` to `Type u`. In addition it shows that the join of two standard augmented SSets is again an augmented SSets. From this the definition of the join of simplicial sets should follow easily. To aid the above theory, an api for `WithInitial SimplexCategory` has been created, with the notion of the `join` and `split` (forming a sort of inverse to join) of objects in this category are defined. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict WIP t-algebraic-topology new-contributor 2137/1 .gitignore,Mathlib.lean,Mathlib/AlgebraicTopology/Join.lean,Mathlib/AlgebraicTopology/SimplexCategory.lean,Mathlib/AlgebraicTopology/SimplexCategoryWithInitial.lean,Mathlib/AlgebraicTopology/SimplicialSet.lean 6 47 ['github-actions', 'jcommelin'] nobody
184-23806
6 months ago
813-77651
813 days ago
1-20227
1 day
11800 JADekker
author:JADekker
 feat: KappaLindelöf spaces Define KappaLindelöf spaces by following the first one-third of the API for Lindelöf spaces. The remainder will be added in a future PR. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) please-adopt merge-conflict t-topology awaiting-zulip 301/2 Mathlib.lean,Mathlib/Topology/Compactness/KappaLindelof.lean,Mathlib/Topology/Compactness/Lindelof.lean 3 38 ['ADedecker', 'JADekker', 'PatrickMassot', 'StevenClontz', 'adomani', 'github-actions', 'grunweg', 'kim-em', 'urkud'] nobody
184-23772
6 months ago
659-44054
659 days ago
123-25636
123 days
12087 JADekker
author:JADekker
 feat: complete API for K-Lindelöf spaces --- - [ ] depends on: #11800 (which is now awaiting a design decision) [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) please-adopt merge-conflict t-topology blocked-by-other-PR 789/17 Mathlib.lean,Mathlib/Order/Filter/CardinalInter.lean,Mathlib/Topology/Compactness/KLindelof.lean,Mathlib/Topology/Compactness/Lindelof.lean 4 2 ['github-actions', 'leanprover-community-mathlib4-bot'] nobody
184-23765
6 months ago
659-43929
659 days ago
99-11243
99 days
12251 ScottCarnahan
author:ScottCarnahan
 refactor(RingTheory/HahnSeries): several generalizations This PR is a container for several smaller PRs that refactor and generalize the existing Hahn series theory. It is (I think) all we need from Hahn series to get a palatable theory of vertex algebras off the ground (other prerequisites from Lie algebras will eventually come in a different PR). Major changes include: - equivalence between iterated Hahn series and Hahn series on Lex products. - introduce `orderTop` and `leadingCoeff` functions. Here, `orderTop` is a `WithTop Γ`-valued version of `order` that does not need `[Zero Γ]` and `leadingCoeff` returns the coefficient of the minimal element of support (or zero if empty). - introduce ordered and cancellative vector addition classes together with some basic theory e.g., finiteness of antidiagonals for partially well-ordered sets. - `HahnSeries Γ R`-module structure on `HahnModule Γ' R V`, when `Γ` is an `OrderedCancelAddCommMonoid`, `Γ'` is a `PartialOrder` with `OrderedCancelVAdd Γ Γ'`, `R` is a semiring, and `V` is an `R`-module. - Move `AddVal` to a separate file - the underlying function is just `orderTop`, but the description of the valuation needs an additional import and an `IsDomain` hypothesis. Results that depended on `AddVal` are changed to use `orderTop` and generalized. --- - [x] depends on: #10781 [HahnSeries on Lex product] - [x] depends on: #10846 [HahnModule] - [x] depends on: #11965 [orderTop] - [x] depends on: #11979 [OrderedVAdd] - [x] depends on: #12996 [leadingTerm] - [x] depends on: #16649 - [x] depends on: #16701 - [x] depends on: #17004 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict WIP t-algebra t-order
label:t-algebra$
 1059/97 Mathlib/RingTheory/HahnSeries/Addition.lean,Mathlib/RingTheory/HahnSeries/Basic.lean,Mathlib/RingTheory/HahnSeries/HEval.lean,Mathlib/RingTheory/HahnSeries/Multiplication.lean,Mathlib/RingTheory/HahnSeries/PowerSeries.lean,Mathlib/RingTheory/HahnSeries/Summable.lean 6 3 ['github-actions', 'mathlib4-dependent-issues-bot'] nobody
184-23750
6 months ago
669-76297
669 days ago
42-37118
42 days
12394 JADekker
author:JADekker
 feat: define pre-tight and tight measures Define tight measures (by first defining separable and pre-tight measures). Define some api for all three concepts Prove Ulam's tightness theorem and a strengthened version of this. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) please-adopt merge-conflict awaiting-author t-measure-probability 503/0 Mathlib.lean,Mathlib/MeasureTheory/Measure/Tight.lean 2 34 ['EtienneC30', 'JADekker', 'github-actions', 'sgouezel'] nobody
184-23745
6 months ago
746-31796
746 days ago
2-24297
2 days
12452 JADekker
author:JADekker
 feat(Cocardinal): add some more api Just a small PR to add a bit more API for cocardinal filters. Not everything seems to generalise nicely from cofinite, so I didn't include such results. Currently the file has one `sorry`, I'm not sure how to complete this proof. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-topology awaiting-CI 75/0 Mathlib/Order/Filter/Cocardinal.lean 1 0 [] nobody
184-23741
6 months ago
756-20021
756 days ago
0-2075
34 minutes
14426 adomani
author:adomani
 feat: `#min_imps` command (development branch) --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict WIP 142/0 Mathlib.lean,Mathlib/Tactic.lean,Mathlib/Tactic/MinImports.lean,test/MinImports.lean 4 2 ['adomani', 'github-actions'] nobody
184-23712
6 months ago
687-3193
687 days ago
0-31
31 seconds
14686 smorel394
author:smorel394
 feat(AlgebraicGeometry/Grassmannian): define the Grassmannian scheme # The Grassmannian scheme Define the Grassmannian scheme by gluing affine charts. We fix a commutative ring `K`, a free `K`-module of finite type `V` and two natural numbers `r` and `c`. The scheme we define should parametrize surjective `K`-linear maps `V →ₗ[K] (Fin r → K)`, assuming that `V` is of rank `r + c`. We actually define the scheme without assuming the condition on the rank of `V`, but it is empty unless the rank of `V` is `r + c`. Main definitions: * `Grassmannian.glueData K V r c`: the `AlgebraicGeometry.Scheme.GlueData` defining the Grassmannian scheme. * `Grassmannian K V r c`: the Grassmannian scheme, defined as `(Grassmannian.glueData K V r c).glued`. * `Grassmannian.structMorphism K V r c`: the structural morphism from `Grassmannian K V r c` to `Spec K`. # Implementation We use as index type for the charts the type `Basis (Fin (r + c)) K V` (so this is empty unless `V` is free of rank `r + c`). All the charts are the same and equal to the affine space with coordinates indexed by `Fin c × Fin r`, that is, to `Spec (MvPolynomial (Fin c × Fin r) K)`. The idea is that, for `i` in `Basis (Fin (r + c)) K V`, the corresponding chart will parametrize all surjective `K`-linear maps `φ : V →ₗ[K] (Fin r → K)` that become isomorphisms when restricted to the `K`-submodule generated by the first `r` vectors of the basis `i`. To get the point of the chart corresponding to `φ`, we take the matrix of `φ` in the basis `i` of `V` and the canonical basis of `Fin r → K`, we divide it on the right by its top `r × r` square submatrix (which is invertible by assumption), and we taken the botton `c × r` submatrix. This is almost the usual description of the Grassmannian by charts, with three differences: * We consider the Grassmannian parametrizing `r`-dimensional quotients of `V` instead of `r`-dimensional subspaces of `V`, because this is more natural when working over a general ring (or scheme). * In the usual description, we fix a basis of `V` and index the chart by its subsets `I` of cardinality `r`. Here, to avoid making a choice, we instead index charts by the set of bases of `V` and always choose the subset `I` to consist of the first `r` vectors. * Instead of working with `FiniteDimensional.finrank K V - r`, which would cause technical trouble because of the way subtraction works on `ℕ`, we introduce the codimension `c` as an auxiliary variable, and our constructions are only interesting when `r + c` is equal to `FiniteDimensional.finrank K V`. # Why is this a WIP * There a bunch of lemmas in the file `AlgebraicGeometry/Grassmannian/Lemmas.lean` that either should not be necessary or should be put in another PR for some other part of mathlib. * The proofs in `AlgebraicGeometry/Grassmannian/Basic.lean` are probably too complicated, and the names suck. # Notes. This contribution was created as part of the AIM workshop "Formalizing algebraic geometry" in June 2024. --- - [x] depends on: #14711 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) please-adopt WIP workshop-AIM-AG-2024 merge-conflict t-algebraic-geometry 1002/0 Mathlib.lean,Mathlib/AlgebraicGeometry/Grassmannian/Basic.lean,Mathlib/AlgebraicGeometry/Grassmannian/Lemmas.lean 3 15 ['erdOne', 'github-actions', 'joelriou', 'leanprover-community-mathlib4-bot', 'smorel394'] nobody
184-23701
6 months ago
679-9708
679 days ago
0-201
3 minutes
17071 ScottCarnahan
author:ScottCarnahan
 feat(LinearAlgebra/RootSystem): separation, base, cartanMatrix This PR defines an abstract separation structure for roots, together with the associated base and Cartan Matrix. In general, the good properties will follow from additional order hypotheses on the base ring (implemented in a future PR). --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict WIP t-algebra
label:t-algebra$
 111/0 Mathlib.lean,Mathlib/LinearAlgebra/RootSystem/Separation.lean 2 1 ['github-actions'] nobody
184-23666
6 months ago
585-14126
585 days ago
20-56416
20 days
17471 joelriou
author:joelriou
 feat(Algebra/ModuleCat/Differentials/Sheaf): the sheaf of relative differentials --- - [ ] depends on: #17366 - [x] depends on: #17388 - [x] depends on: #16755 - [ ] depends on: #17469 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) WIP blocked-by-other-PR t-category-theory large-import merge-conflict t-algebraic-geometry 740/10 Mathlib.lean,Mathlib/Algebra/Category/ModuleCat/Differentials/Presheaf.lean,Mathlib/Algebra/Category/ModuleCat/Differentials/Sheaf.lean,Mathlib/Algebra/Category/ModuleCat/Presheaf/Limits.lean,Mathlib/Algebra/Category/ModuleCat/Presheaf/Pullback.lean,Mathlib/Algebra/Category/Ring/Constructions.lean,Mathlib/Algebra/Ring/Hom/Defs.lean,Mathlib/AlgebraicGeometry/Modules/Differentials.lean,Mathlib/Geometry/RingedSpace/SheafedSpace.lean 9 2 ['github-actions', 'mathlib4-dependent-issues-bot'] nobody
184-23659
6 months ago
unknown
0-0
0 seconds
18626 hannahfechtner
author:hannahfechtner
 feat: define Artin braid groups Define the Artin braid group on infinitely many strands. Includes a toGroup function which defines a function out of the braid group to any other group (given a function which satisfies the braid relations) (more to come in this file; next up: Artin braid groups on finitely many strands) --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict awaiting-author t-algebra new-contributor
label:t-algebra$
 91/0 Mathlib.lean,Mathlib/GroupTheory/SpecificGroups/BraidGroup/Basic.lean 2 22 ['github-actions', 'hannahfechtner', 'jcommelin', 'joelriou'] nobody
184-23653
6 months ago
547-30532
547 days ago
15-38478
15 days
18784 erdOne
author:erdOne
 feat(AlgebraicGeometry): use `addMorphismPropertyInstances` --- - [ ] depends on: #18785 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-algebraic-geometry blocked-by-other-PR 435/91 Mathlib.lean,Mathlib/AlgebraicGeometry/Cover/Open.lean,Mathlib/AlgebraicGeometry/Morphisms/Affine.lean,Mathlib/AlgebraicGeometry/Morphisms/ClosedImmersion.lean,Mathlib/AlgebraicGeometry/Morphisms/FinitePresentation.lean,Mathlib/AlgebraicGeometry/Morphisms/FiniteType.lean,Mathlib/AlgebraicGeometry/Morphisms/OpenImmersion.lean,Mathlib/AlgebraicGeometry/Morphisms/Proper.lean,Mathlib/AlgebraicGeometry/Morphisms/QuasiCompact.lean,Mathlib/AlgebraicGeometry/Morphisms/QuasiSeparated.lean,Mathlib/AlgebraicGeometry/Morphisms/RingHomProperties.lean,Mathlib/AlgebraicGeometry/Morphisms/Smooth.lean,Mathlib/AlgebraicGeometry/Morphisms/UniversallyClosed.lean,Mathlib/AlgebraicGeometry/Restrict.lean,Mathlib/CategoryTheory/MorphismProperty/Composition.lean,Mathlib/CategoryTheory/MorphismProperty/Limits.lean,Mathlib/CategoryTheory/MorphismProperty/Tactic.lean,MathlibTest/AddMorphismPropertyInstances.lean 18 2 ['github-actions', 'mathlib4-dependent-issues-bot'] nobody
184-23644
6 months ago
559-46849
559 days ago
0-1869
31 minutes
19062 hannahfechtner
author:hannahfechtner
 feat(Algebra/PresentedMonoid/Basic): facts about rel Add in a number of useful theorems (reflexivity, closure under multiplication) and lemmas about when the PresentedMonoid.rel holds as an API for users --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) awaiting-author t-algebra
label:t-algebra$
 38/0 Mathlib/GroupTheory/Congruence/Defs.lean 1 8 ['github-actions', 'hannahfechtner', 'kbuzzard', 'riccardobrasca'] nobody
184-23639
6 months ago
451-34599
451 days ago
87-64575
87 days
19607 madvorak
author:madvorak
 feat: block matrices are totally unimodular --- Discussion: https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/TU.20block.20matrix.20.2319607 - [ ] depends on: #19323 - [ ] depends on: #20428 - [ ] depends on: #20433 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict WIP blocked-by-other-PR 156/0 Mathlib.lean,Mathlib/Data/Sum/Decompose.lean,Mathlib/LinearAlgebra/Matrix/Determinant/TotallyUnimodular.lean 3 11 ['github-actions', 'jcommelin', 'leanprover-community-bot-assistant', 'madvorak', 'mathlib4-dependent-issues-bot'] nobody
184-23629
6 months ago
unknown
0-0
0 seconds
20029 FrederickPu
author:FrederickPu
 feat(Tactic/simps): allow for Config attributes to be set directly Allow for Config attributes to be set directly when using initialize_simp_projection as per issue #19895 Basically modified initialize_simp_projection so that the user has the option of specifying a tuple of config option values. Ex: ``` initialize_simp_projection MulEquiv (toFun → apply, invFun → symm_apply) (fullyApplied := false) ``` These config options are then converted into projections.  --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict WIP new-contributor t-meta 34/4 Mathlib/Tactic/Simps/Basic.lean 1 11 ['FrederickPu', 'YaelDillies', 'fpvandoorn', 'github-actions', 'leanprover-community-bot-assistant'] nobody
184-23590
6 months ago
520-40839
520 days ago
0-34081
9 hours
21269 658060
author:658060
 feat(CategoryTheory/Topos): basic definitions and results in topos theory This code contains basic definitions and results in topos theory, including the definition of a subobject classifier, power objects, and topoi. It is proved that every topos has exponential objects, i.e. "internal homs". The mathematical content follows chapter IV sections 1-2 of Mac Lane and Moerdijk's text "Sheaves in Geometry and Logic". --- - [x] depends on: #21281 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) WIP t-category-theory new-contributor merge-conflict awaiting-author 1269/0 Mathlib.lean,Mathlib/CategoryTheory/Topos/Basic.lean,Mathlib/CategoryTheory/Topos/Classifier.lean,Mathlib/CategoryTheory/Topos/Exponentials.lean,Mathlib/CategoryTheory/Topos/Power.lean 5 10 ['658060', 'gio256', 'github-actions', 'joelriou', 'mathlib4-dependent-issues-bot'] nobody
184-23563
6 months ago
477-2377
477 days ago
0-13879
3 hours
22805 ScottCarnahan
author:ScottCarnahan
 feat(FieldTheory/Finite): fixed points of Frobenius automorphism This PR identifies the prime field with the fixed points of frobenius. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict WIP t-algebra
label:t-algebra$
 325/7 Mathlib/Algebra/Algebra/ZMod.lean,Mathlib/Algebra/Field/Subfield/Basic.lean,Mathlib/FieldTheory/Finite/Basic.lean,Mathlib/FieldTheory/Finite/GaloisField.lean 4 1 ['github-actions'] nobody
184-23551
6 months ago
unknown
0-0
0 seconds
23990 robertmaxton42
author:robertmaxton42
 feat(Types.Colimits): Quot is functorial and colimitEquivQuot is natural Add `Functor.quotFunctor` to parallel `Functor.sectionsFunctor`, witnessing that `Quot` is functorial; add `colimNatIsoQuotFunctor` to parallel `limNatIsoSectionsFunctor`, witnessing that `colimitEquivQuot` is natural in the diagram $F$. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict awaiting-author t-category-theory new-contributor 33/0 Mathlib/CategoryTheory/Limits/Types/Colimits.lean 1 5 ['github-actions', 'joelriou', 'leanprover-community-bot-assistant', 'robertmaxton42'] nobody
184-23446
6 months ago
396-22381
396 days ago
8-27136
8 days
24533 robertmaxton42
author:robertmaxton42
 feat(ULift): conjugation by ULift.up/down, misc cast/heq lemmas * Adds the convenience def `ULift.conj x := `down (f (up x))`, and corresponding basic lemmas * Adds lemmas showing that `ULift.up` and `.down` commute with casts and preserve `HEq`. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) awaiting-author t-data 31/0 Mathlib/Data/ULift.lean 1 23 ['eric-wieser', 'github-actions', 'grunweg', 'robertmaxton42'] nobody
184-23442
6 months ago
267-51230
267 days ago
118-2181
118 days
24690 ScottCarnahan
author:ScottCarnahan
 feat(Data.Prod): reverse lexicographic order This PR implements the type synonym RevLex as a one-field structure, defines an order on products, and proves an order isomorphism with the Lex product with factors switched. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict WIP t-order 141/0 Mathlib.lean,Mathlib/Data/Prod/RevLex.lean 2 5 ['ScottCarnahan', 'YaelDillies', 'github-actions', 'mathlib4-merge-conflict-bot'] nobody
184-23432
6 months ago
359-68957
359 days ago
19-33859
19 days
24692 ScottCarnahan
author:ScottCarnahan
 feat(RingTheory/HahnSeries/Basic): isomorphism of Hahn series induced by order isomorphism This PR introduces an isomorphism of Hahn series induced by an order isomorphism on the exponent posets. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict WIP t-order 35/0 Mathlib/RingTheory/HahnSeries/Basic.lean 1 2 ['github-actions', 'mathlib4-merge-conflict-bot'] nobody
184-23426
6 months ago
347-53881
347 days ago
31-47622
31 days
25034 ScottCarnahan
author:ScottCarnahan
 feat(Algebra/Module/Equiv/Basic): Restriction of scalars from a semilinear equivalence to a linear equivalence If `M` and `M₂` are both `R`-modules and modules for `S` and `S₂`, respectively, then for any ring isomorphism `e` between `S` and `S₂` and any `e`-semilinear equivalence between `M` and `M₂` that respects the `R`-action, we obtain an `R`-linear equivalence between `M` and `M₂`. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) WIP t-algebra
label:t-algebra$
 28/0 Mathlib/Algebra/Module/Equiv/Basic.lean 1 1 ['github-actions'] nobody
184-23419
6 months ago
347-53843
347 days ago
20-11468
20 days
24627 pechersky
author:pechersky
 feat(Topology/Algebra/Valued): `IsLinearTopology 𝒪[K] K` and `𝒪[K] 𝒪[K]` as well as `IsLinearTopology ℤ_[p] ℤ_[p]` --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) - [x] depends on: #26829 merge-conflict awaiting-author t-topology 219/26 Mathlib.lean,Mathlib/NumberTheory/Padics/LinearTopology.lean,Mathlib/Topology/Algebra/Valued/LinearTopology.lean,Mathlib/Topology/Algebra/Valued/ValuationTopology.lean,Mathlib/Topology/Algebra/Valued/ValuedField.lean 5 55 ['ADedecker', 'erdOne', 'faenuccio', 'github-actions', 'jcommelin', 'leanprover-community-bot-assistant', 'loefflerd', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot', 'pechersky'] jcommelin
assignee:jcommelin
179-36184
5 months ago
184-51580
184 days ago
36-378
36 days
24016 plp127
author:plp127
 feat: fine uniformity Adds the fine uniformity, and proves some properties. --- - [ ] depends on: #24096 for showing the induced topology is equal on completely regular spaces [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-topology 283/0 Mathlib.lean,Mathlib/Topology/UniformSpace/FineUniformity.lean,Mathlib/Topology/UniformSpace/Uniformizable.lean 3 3 ['github-actions', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
178-69973
5 months ago
400-78723
400 days ago
2-85308
2 days
24514 b-mehta
author:b-mehta
 chore(Int/GCD): use fuel in xgcd Modify the definition of xgcd to use fuel recursion, to allow it to be reduced in the kernel. As a consequence, this means the evaluation of field operations in ZMod p become provable by `rfl` and `decide`. Zulip discussion: https://leanprover.zulipchat.com/#narrow/channel/270676-lean4/topic/opaque.20recursion.20definitions.20break.20mergeSort.20decidability --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) awaiting-author t-data merge-conflict 44/22 Mathlib/Data/Int/GCD.lean 1 6 ['astrainfinita', 'b-mehta', 'eric-wieser', 'github-actions', 'mathlib4-merge-conflict-bot', 'nomeata', 'urkud'] nobody
176-38992
5 months ago
327-78870
327 days ago
58-34020
58 days
24441 MrSumato
author:MrSumato
 feat(Data/List): add Lyndon-Schutzenberger theorem on list commutativity Add Lyndon-Schutzenberger theorem on list commutativity. Included definition for List.repeatSelf that returns list repeated n times. --- This is my first mathlib PR, so any comments are highly appreciated. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict awaiting-author t-data new-contributor 129/1 Mathlib.lean,Mathlib/Data/List/Commutativity.lean,Mathlib/Data/List/Defs.lean,Mathlib/Data/List/Lemmas.lean 4 38 ['MrSumato', 'github-actions', 'grunweg', 'madvorak', 'mathlib4-merge-conflict-bot', 'plp127'] grunweg
assignee:grunweg
168-6093
5 months ago
350-32437
350 days ago
29-59355
29 days
32473 mattrobball
author:mattrobball
 chore(Kaehler.JacobiZariski): remove egregious local instance hack This code looks terrible and is no longer strictly necessary. Local timings give `lake build Mathlib/RingTheory/Kaehler/JacobiZariski.lean 39.77s user 1.07s system 263% cpu 15.482 total` after removal and `lake build Mathlib/RingTheory/Kaehler/JacobiZariski.lean 36.93s user 1.01s system 251% cpu 15.113 total` before the removal. So the preformance impact of removal is small. One could argue that keeping is a remainder that everything here needs to be seriously changed but the miminmal performance difference suggests that these local instances would be a red herring in that regard. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-ring-theory awaiting-author merge-conflict 0/4 Mathlib/RingTheory/Kaehler/JacobiZariski.lean 1 14 ['chrisflav', 'erdOne', 'github-actions', 'leanprover-radar', 'mathlib-merge-conflicts', 'mattrobball'] nobody
167-29716
5 months ago
167-29716
167 days ago
1-301
1 day
23040 grunweg
author:grunweg
 feat: define immersions and smooth embeddings in infinite dimensions Sadly, we cannot prove most nice things about them yet, as we don't have the inverse function theorem yet. TODO: prove the few things we can already say --- - [ ] depends on: #28796 - [x] depends on: #28853 - [x] depends on: #23175 (preliminaries) - [x] depends on: #23186 - [ ] depends on: another PR, about `MSplitAt` (to be filed) - and perhaps some prerequisites about products of complemented modules etc. - [x] depends on: #23219 (preliminaries about local diffeomorphisms) - [x] depends on: #8738 - in fact, #9273 is not a strict pre-requisite for this. It suffices to know "extended charts have invertible differentials", which [isInvertible_mfderiv_extChartAt](https://leanprover-community.github.io/mathlib4_docs/Mathlib/Geometry/Manifold/MFDeriv/Atlas.html#isInvertible_mfderiv_extChartAt) mostly proves. (There's nothing wrong with completing that PR, for all interior points.) [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict WIP t-differential-geometry blocked-by-other-PR 967/0 Mathlib.lean,Mathlib/Analysis/NormedSpace/HahnBanach/Splits.lean,Mathlib/Geometry/Manifold/IsImmersionEmbedding.lean,Mathlib/Geometry/Manifold/LocalDiffeomorph.lean,Mathlib/Geometry/Manifold/MSplits.lean 5 4 ['github-actions', 'grunweg', 'leanprover-community-bot-assistant', 'mathlib4-dependent-issues-bot'] nobody
163-31483
5 months ago
unknown
0-0
0 seconds
6633 adomani
author:adomani
 feat(..Polynomial..): `MvPolynomial`s have no zero divisors This PR continues #6627, placing the `NoZeroDivisors` instance on `MvPolynomial`s and removing auxiliary intermediate results that are no longer needed. Affected files: ``` Data/MvPolynomial/Basic.lean Data/Polynomial/RingDivision.lean RingTheory/Polynomial/Basic.lean ``` --- - [x] depends on: #6227 for the `NoZeroDivisors` instance on `AddMonoidAlgebra`s [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict awaiting-author t-algebra
label:t-algebra$
 143/57 Mathlib/Algebra/MonoidAlgebra/NoZeroDivisors.lean,Mathlib/Data/MvPolynomial/Basic.lean,Mathlib/Data/Polynomial/RingDivision.lean,Mathlib/RingTheory/Polynomial/Basic.lean 4 6 ['SnirBroshi', 'YaelDillies', 'adomani', 'eric-wieser'] nobody
162-25253
5 months ago
1009-9595
1009 days ago
0-19485
5 hours
21447 erdOne
author:erdOne
 feat(AlgebraicGeometry): the split algebraic torus --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict awaiting-author t-algebraic-geometry 419/0 Mathlib.lean,Mathlib/AlgebraicGeometry/Torus.lean 2 6 ['erdOne', 'github-actions', 'jcommelin', 'joelriou', 'mathlib4-merge-conflict-bot'] nobody
155-49418
5 months ago
469-1588
469 days ago
2-69252
2 days
21495 alreadydone
author:alreadydone
 experiment: reducible HasQuotient.quotient' --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) WIP merge-conflict 2/0 Mathlib/Algebra/Quotient.lean 1 2 ['github-actions', 'mathlib4-merge-conflict-bot'] nobody
154-13815
5 months ago
470-36645
470 days ago
0-200
3 minutes
5934 eric-wieser
author:eric-wieser
 feat: port Data.Rat.MetaDefs --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) This needs some eyes from people familiar with Qq merge-conflict help-wanted mathlib-port t-meta 183/0 Mathlib.lean,Mathlib/Data/Rat/MetaDefs.lean,test/rat.lean 3 5 ['eric-wieser', 'gebner', 'vihdzp'] nobody
147-11234
4 months ago
unknown
0-0
0 seconds
4960 eric-wieser
author:eric-wieser
 chore: use `open scoped` Earlier versions of mathport did not know about this. This was done by searching for all `open` commands referencing: * `Classical` * `BigOperators` * `Topology` * `Pointwise` --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict awaiting-CI 1026/981 Mathlib/Algebra/AddTorsor.lean,Mathlib/Algebra/Algebra/Basic.lean,Mathlib/Algebra/Algebra/Equiv.lean,Mathlib/Algebra/Algebra/Hom.lean,Mathlib/Algebra/Algebra/Operations.lean,Mathlib/Algebra/Algebra/Subalgebra/Basic.lean,Mathlib/Algebra/Algebra/Subalgebra/Pointwise.lean,Mathlib/Algebra/Algebra/Subalgebra/Tower.lean,Mathlib/Algebra/Algebra/Tower.lean,Mathlib/Algebra/BigOperators/Associated.lean,Mathlib/Algebra/BigOperators/Basic.lean,Mathlib/Algebra/BigOperators/Fin.lean,Mathlib/Algebra/BigOperators/Finprod.lean,Mathlib/Algebra/BigOperators/Finsupp.lean,Mathlib/Algebra/BigOperators/Intervals.lean,Mathlib/Algebra/BigOperators/NatAntidiagonal.lean,Mathlib/Algebra/BigOperators/Option.lean,Mathlib/Algebra/BigOperators/Order.lean,Mathlib/Algebra/BigOperators/Pi.lean,Mathlib/Algebra/BigOperators/Ring.lean,Mathlib/Algebra/BigOperators/RingEquiv.lean,Mathlib/Algebra/Bounds.lean,Mathlib/Algebra/Category/GroupCat/Biproducts.lean,Mathlib/Algebra/Category/GroupCat/FilteredColimits.lean,Mathlib/Algebra/Category/GroupCat/Injective.lean,Mathlib/Algebra/Category/ModuleCat/Adjunctions.lean,Mathlib/Algebra/Category/ModuleCat/Biproducts.lean,Mathlib/Algebra/Category/Mon/FilteredColimits.lean,Mathlib/Algebra/Category/Ring/Adjunctions.lean,Mathlib/Algebra/Category/Ring/FilteredColimits.lean,Mathlib/Algebra/CharP/Basic.lean,Mathlib/Algebra/CharP/Two.lean,Mathlib/Algebra/DirectLimit.lean,Mathlib/Algebra/DirectSum/Basic.lean,Mathlib/Algebra/DirectSum/Decomposition.lean,Mathlib/Algebra/DirectSum/Internal.lean,Mathlib/Algebra/DirectSum/Ring.lean,Mathlib/Algebra/EuclideanDomain/Defs.lean,Mathlib/Algebra/Field/Defs.lean,Mathlib/Algebra/GCDMonoid/Div.lean,Mathlib/Algebra/GeomSum.lean,Mathlib/Algebra/GroupWithZero/Basic.lean,Mathlib/Algebra/GroupWithZero/Commute.lean,Mathlib/Algebra/GroupWithZero/Units/Basic.lean,Mathlib/Algebra/Homology/Additive.lean,Mathlib/Algebra/Homology/ComplexShape.lean,Mathlib/Algebra/Homology/Homology.lean,Mathlib/Algebra/Homology/Homotopy.lean,Mathlib/Algebra/Homology/HomotopyCategory.lean,Mathlib/Algebra/Homology/ImageToKernel.lean,Mathlib/Algebra/IndicatorFunction.lean,Mathlib/Algebra/LinearRecurrence.lean,Mathlib/Algebra/Module/BigOperators.lean,Mathlib/Algebra/Module/GradedModule.lean,Mathlib/Algebra/Module/LinearMap.lean,Mathlib/Algebra/Module/PointwisePi.lean,Mathlib/Algebra/Module/Submodule/Basic.lean,Mathlib/Algebra/Module/Submodule/Bilinear.lean,Mathlib/Algebra/Module/Submodule/Lattice.lean,Mathlib/Algebra/Module/Submodule/Pointwise.lean,Mathlib/Algebra/Module/Torsion.lean,Mathlib/Algebra/MonoidAlgebra/Basic.lean,Mathlib/Algebra/MonoidAlgebra/Degree.lean,Mathlib/Algebra/Order/Chebyshev.lean,Mathlib/Algebra/Order/Module.lean,Mathlib/Algebra/Order/Pointwise.lean,Mathlib/Algebra/Order/Rearrangement.lean,Mathlib/Algebra/Order/SMul.lean,Mathlib/Algebra/Order/UpperLower.lean,Mathlib/Algebra/Periodic.lean,Mathlib/Algebra/Polynomial/BigOperators.lean,Mathlib/Algebra/Polynomial/GroupRingAction.lean,Mathlib/Algebra/Star/BigOperators.lean,Mathlib/Algebra/Star/Pointwise.lean,Mathlib/Algebra/Star/Subalgebra.lean,Mathlib/Algebra/Support.lean,Mathlib/Algebra/TrivSqZeroExt.lean,Mathlib/Algebra/Tropical/BigOperators.lean,Mathlib/AlgebraicGeometry/PrimeSpectrum/Basic.lean,Mathlib/AlgebraicGeometry/PrimeSpectrum/Maximal.lean,Mathlib/AlgebraicGeometry/ProjectiveSpectrum/Topology.lean,Mathlib/AlgebraicTopology/AlternatingFaceMapComplex.lean,Mathlib/AlgebraicTopology/ExtraDegeneracy.lean,Mathlib/AlgebraicTopology/TopologicalSimplex.lean,Mathlib/Analysis/Analytic/Basic.lean,Mathlib/Analysis/Asymptotics/AsymptoticEquivalent.lean,Mathlib/Analysis/Asymptotics/Asymptotics.lean,Mathlib/Analysis/Asymptotics/SpecificAsymptotics.lean,Mathlib/Analysis/Asymptotics/SuperpolynomialDecay.lean,Mathlib/Analysis/Asymptotics/Theta.lean,Mathlib/Analysis/BoxIntegral/Box/Basic.lean,Mathlib/Analysis/BoxIntegral/Box/SubboxInduction.lean,Mathlib/Analysis/BoxIntegral/Partition/Additive.lean,Mathlib/Analysis/BoxIntegral/Partition/Basic.lean,Mathlib/Analysis/BoxIntegral/Partition/Filter.lean,Mathlib/Analysis/BoxIntegral/Partition/Split.lean,Mathlib/Analysis/BoxIntegral/Partition/SubboxInduction.lean,Mathlib/Analysis/BoxIntegral/Partition/Tagged.lean,Mathlib/Analysis/Calculus/ContDiffDef.lean,Mathlib/Analysis/Calculus/Deriv/Add.lean 788 1 ['vihdzp'] nobody
147-11131
4 months ago
1076-82261
1076 days ago
0-753
12 minutes
4127 kmill
author:kmill
 refactor: create HasAdj class, define Digraph, and generalize some SimpleGraph API --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict awaiting-author t-combinatorics 1403/551 Mathlib.lean,Mathlib/Combinatorics/Digraph/Basic.lean,Mathlib/Combinatorics/Graph/Classes.lean,Mathlib/Combinatorics/Graph/Dart.lean,Mathlib/Combinatorics/Graph/Hom.lean,Mathlib/Combinatorics/SimpleGraph/AdjMatrix.lean,Mathlib/Combinatorics/SimpleGraph/Basic.lean,Mathlib/Combinatorics/SimpleGraph/Clique.lean,Mathlib/Combinatorics/SimpleGraph/Coloring.lean,Mathlib/Combinatorics/SimpleGraph/Connectivity.lean,Mathlib/Combinatorics/SimpleGraph/DegreeSum.lean,Mathlib/Combinatorics/SimpleGraph/Density.lean,Mathlib/Combinatorics/SimpleGraph/Ends/Defs.lean,Mathlib/Combinatorics/SimpleGraph/Finsubgraph.lean,Mathlib/Combinatorics/SimpleGraph/Hasse.lean,Mathlib/Combinatorics/SimpleGraph/Prod.lean,Mathlib/Combinatorics/SimpleGraph/StronglyRegular.lean,Mathlib/Combinatorics/SimpleGraph/Subgraph.lean 18 2 ['SnirBroshi', 'vihdzp'] nobody
147-7106
4 months ago
1090-26947
1090 days ago
8-43930
8 days
14444 digama0
author:digama0
 fix(GeneralizeProofs): unreachable! bug As [reported on Zulip](https://leanprover.zulipchat.com/#narrow/stream/270676-lean4/topic/Unreachable.20code.20reached.20in.20Lean.204.2E8.2E0/near/449286780). --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict awaiting-author t-meta 1/1 Mathlib/Tactic/GeneralizeProofs.lean 1 6 ['github-actions', 'jcommelin', 'kmill', 'mathlib4-merge-conflict-bot', 'plby'] nobody
144-71922
4 months ago
676-926
676 days ago
10-36842
10 days
25138 chrisflav
author:chrisflav
 chore(RingTheory/Ideal): make `RingHom.ker` take a `RingHom` instead of `RingHomClass` --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra awaiting-author merge-conflict
label:t-algebra$
 317/309 Mathlib/Algebra/Algebra/Equiv.lean,Mathlib/Algebra/Algebra/Hom.lean,Mathlib/Algebra/Algebra/Hom/Rat.lean,Mathlib/Algebra/Algebra/Opposite.lean,Mathlib/Algebra/Algebra/Subalgebra/Operations.lean,Mathlib/Algebra/Algebra/Tower.lean,Mathlib/Algebra/Category/CommAlgCat/FiniteType.lean,Mathlib/Algebra/Lie/CartanExists.lean,Mathlib/Algebra/MonoidAlgebra/Basic.lean,Mathlib/Algebra/MvPolynomial/Equiv.lean,Mathlib/Algebra/MvPolynomial/Eval.lean,Mathlib/Algebra/Polynomial/AlgebraMap.lean,Mathlib/Algebra/Polynomial/Module/AEval.lean,Mathlib/Algebra/RingQuot.lean,Mathlib/AlgebraicGeometry/EllipticCurve/Affine/Basic.lean,Mathlib/AlgebraicGeometry/EllipticCurve/Affine/Formula.lean,Mathlib/AlgebraicGeometry/EllipticCurve/Jacobian/Basic.lean,Mathlib/AlgebraicGeometry/EllipticCurve/Projective/Basic.lean,Mathlib/AlgebraicGeometry/EllipticCurve/VariableChange.lean,Mathlib/AlgebraicGeometry/EllipticCurve/Weierstrass.lean,Mathlib/AlgebraicGeometry/Pullbacks.lean,Mathlib/Combinatorics/Nullstellensatz.lean,Mathlib/FieldTheory/Minpoly/Field.lean,Mathlib/FieldTheory/PurelyInseparable/Tower.lean,Mathlib/LinearAlgebra/Semisimple.lean,Mathlib/LinearAlgebra/TensorProduct/RightExactness.lean,Mathlib/NumberTheory/NumberField/InfinitePlace/Embeddings.lean,Mathlib/RingTheory/AdicCompletion/Algebra.lean,Mathlib/RingTheory/Adjoin/Tower.lean,Mathlib/RingTheory/AdjoinRoot.lean,Mathlib/RingTheory/Algebraic/Basic.lean,Mathlib/RingTheory/Congruence/Hom.lean,Mathlib/RingTheory/Etale/Kaehler.lean,Mathlib/RingTheory/Extension/Cotangent/Basis.lean,Mathlib/RingTheory/Extension/Cotangent/LocalizationAway.lean,Mathlib/RingTheory/Extension/Generators.lean,Mathlib/RingTheory/Extension/Presentation/Basic.lean,Mathlib/RingTheory/Extension/Presentation/Core.lean,Mathlib/RingTheory/FinitePresentation.lean,Mathlib/RingTheory/FiniteStability.lean,Mathlib/RingTheory/Finiteness/NilpotentKer.lean,Mathlib/RingTheory/Ideal/Cotangent.lean,Mathlib/RingTheory/Ideal/Maps.lean,Mathlib/RingTheory/Ideal/Quotient/Operations.lean,Mathlib/RingTheory/IsAdjoinRoot.lean,Mathlib/RingTheory/Jacobson/Ring.lean,Mathlib/RingTheory/Kaehler/Basic.lean,Mathlib/RingTheory/Kaehler/JacobiZariski.lean,Mathlib/RingTheory/LocalRing/ResidueField/Fiber.lean,Mathlib/RingTheory/LocalRing/ResidueField/Ideal.lean,Mathlib/RingTheory/Localization/Algebra.lean,Mathlib/RingTheory/MvPowerSeries/Evaluation.lean,Mathlib/RingTheory/Nilpotent/Lemmas.lean,Mathlib/RingTheory/NoetherNormalization.lean,Mathlib/RingTheory/Nullstellensatz.lean,Mathlib/RingTheory/Polynomial/Basic.lean,Mathlib/RingTheory/Polynomial/UniqueFactorization.lean,Mathlib/RingTheory/Polynomial/UniversalFactorizationRing.lean,Mathlib/RingTheory/Smooth/AdicCompletion.lean,Mathlib/RingTheory/Smooth/Basic.lean,Mathlib/RingTheory/Smooth/Flat.lean,Mathlib/RingTheory/Smooth/Kaehler.lean,Mathlib/RingTheory/Smooth/NoetherianDescent.lean,Mathlib/RingTheory/Spectrum/Prime/ChevalleyComplexity.lean,Mathlib/RingTheory/Unramified/Finite.lean,Mathlib/Topology/Algebra/Module/CharacterSpace.lean,Mathlib/Topology/ContinuousMap/Ideals.lean,Mathlib/Topology/ContinuousMap/StoneWeierstrass.lean 68 8 ['chrisflav', 'erdOne', 'eric-wieser', 'github-actions', 'jcommelin', 'leanprover-community-bot-assistant', 'mathlib4-merge-conflict-bot'] nobody
144-59330
4 months ago
363-76858
363 days ago
0-3642
1 hour
24665 Komyyy
author:Komyyy
 feat(Mathlib/Topology/Metrizable/Uniformity): every uniform space is generated by a family of pseudometrics --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) WIP t-topology merge-conflict 54/0 Mathlib/Topology/Metrizable/Uniformity.lean 1 2 ['github-actions', 'mathlib4-merge-conflict-bot'] nobody
143-2054
4 months ago
380-8996
380 days ago
0-1
1 second
33462 eric-wieser
author:eric-wieser
 feat: teach `fun_prop` about `ContinousMultilinearMap.compContinuousLinearMap` For now I've omitted the curried version --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-analysis 46/0 Mathlib/Analysis/Normed/Module/Multilinear/Basic.lean 1 3 ['github-actions', 'sgouezel'] nobody
141-3288
4 months ago
141-16526
141 days ago
141-16237
141 days
25500 eric-wieser
author:eric-wieser
 feat: delaborators for metadata Being able to see these is very important when debugging tactic failures. Probably these could be upstreamed, but I don't think that's a reason not to merge them here first. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) large-import merge-conflict awaiting-author delegated t-meta 75/3 Mathlib/Util/Delaborators.lean,Mathlib/Util/PPOptions.lean,MathlibTest/delaborators.lean 3 19 ['JovanGerb', 'Rob23oba', 'eric-wieser', 'github-actions', 'kmill', 'mathlib-bors', 'mathlib4-merge-conflict-bot', 'plp127'] nobody
139-74345
4 months ago
267-18458
267 days ago
83-68773
83 days
21344 kbuzzard
author:kbuzzard
 chore: attempt to avoid diamond in OreLocalization --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) please-adopt t-algebra
label:t-algebra$
 16/5 Mathlib/RingTheory/OreLocalization/Basic.lean 1 6 ['erdOne', 'github-actions', 'kbuzzard'] nobody
137-86322
4 months ago
472-84017
472 days ago
1-35979
1 day
17176 arulandu
author:arulandu
 feat: integrals and integrability with .re Lemmas for swapping order of .re and integration/integrability. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict awaiting-author new-contributor t-measure-probability please-adopt 49/0 Mathlib/MeasureTheory/Function/L1Space.lean,Mathlib/MeasureTheory/Integral/IntegrableOn.lean,Mathlib/MeasureTheory/Integral/IntervalIntegral.lean,Mathlib/MeasureTheory/Integral/SetIntegral.lean 4 32 ['EtienneC30', 'arulandu', 'github-actions', 'loefflerd'] nobody
137-7337
4 months ago
584-54574
584 days ago
9-73631
9 days
24010 grunweg
author:grunweg
 feat(Counterexamples): a non-negative function, not a.e. zero, with vanishing lowe… …r Lebesgue integral. Came up in #23707, let's document this while we're at it. --- - [ ] depends on: #20722 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict please-adopt WIP blocked-by-other-PR t-measure-probability 110/0 Counterexamples.lean,Counterexamples/LIntegralZero.lean 2 3 ['github-actions', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
134-31967
4 months ago
404-7012
404 days ago
0-22
22 seconds
33669 eric-wieser
author:eric-wieser
 chore(Data/Nat/Digits): refactor to use List.rightpad --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) large-import merge-conflict 32/12 Mathlib/Algebra/BigOperators/Group/List/Defs.lean,Mathlib/Algebra/Group/Basic.lean,Mathlib/Data/List/Lemmas.lean,Mathlib/Data/Nat/Digits/Defs.lean,Mathlib/Data/Nat/Digits/Lemmas.lean 5 3 ['github-actions', 'mathlib4-merge-conflict-bot', 'xroblot'] nobody
132-49692
4 months ago
136-18382
136 days ago
0-237
3 minutes
13158 erdOne
author:erdOne
 refactor(RingTheory/OreLocalization/Module): remove `LocalizedModule.mk`. --- - [x] depends on: #13151 - [ ] depends on: #13156 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-algebra blocked-by-other-PR
label:t-algebra$
 49/48 Mathlib/RingTheory/OreLocalization/Basic.lean,Mathlib/RingTheory/OreLocalization/Module.lean 2 2 ['urkud'] nobody
130-64138
4 months ago
715-38206
715 days ago
9-15083
9 days
12934 grunweg
author:grunweg
 chore: replace more uses of > or ≥ by < or ≤ These were flagged by the linter in https://github.com/leanprover-community/mathlib4/pull/12879: it is easy to simple avoid > or ≥ in hypotheses or haves. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict awaiting-author help-wanted 41/42 Archive/Imo/Imo1962Q1.lean,Archive/Imo/Imo1988Q6.lean,Archive/Imo/Imo1994Q1.lean,Archive/Imo/Imo2005Q3.lean,Archive/Imo/Imo2006Q3.lean,Archive/Imo/Imo2008Q2.lean,Archive/Imo/Imo2008Q3.lean,Archive/Imo/Imo2019Q4.lean,Archive/Sensitivity.lean,Archive/Wiedijk100Theorems/CubingACube.lean,Mathlib/Tactic/Linarith/Datatypes.lean,test/cancel_denoms.lean,test/congr.lean,test/interval_cases.lean,test/observe.lean 15 12 ['YaelDillies', 'adomani', 'github-actions', 'grunweg', 'jcommelin', 'urkud'] nobody
130-64045
4 months ago
735-33470
735 days ago
1-73101
1 day
20719 gio256
author:gio256
 feat(AlgebraicTopology): delaborators for truncated simplicial notations We add delaborators for the following notations, introduced in #20688: - `⦋m⦌ₙ`, which denotes the `m`-dimensional simplex in the `n`-truncated simplex category. - `X _⦋m⦌ₙ`, which denotes the `m`-th term of an `n`-truncated simplicial object `X`. - `X ^⦋m⦌ₙ`, which denotes the `m`-th term of an `n`-truncated cosimplicial object `X`. If `pp.proofs` is set to `true`, we also pretty-print the proof `p : m ≤ n` for all three notations as `⦋m, p⦌ₙ`, `X _⦋m, p⦌ₙ`, and `X ^⦋m, p⦌ₙ`, respectively. Credit to @kmill for one piece of code and much metaprogramming inspiration. --- - [x] depends on: #20688 - [x] depends on: #23018 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-algebraic-topology infinity-cosmos t-meta please-adopt will-close-soon 525/33 Mathlib.lean,Mathlib/AlgebraicTopology/SimplexCategory/Basic.lean,Mathlib/AlgebraicTopology/SimplexCategory/Defs.lean,Mathlib/AlgebraicTopology/SimplicialObject/Basic.lean,Mathlib/Tactic.lean,Mathlib/Tactic/SimplexCategory.lean,Mathlib/Util/Superscript.lean,MathlibTest/SimplexCategory.lean,MathlibTest/SimplicialObject.lean,MathlibTest/superscript.lean,scripts/noshake.json 11 24 ['eric-wieser', 'gio256', 'github-actions', 'joneugster', 'kim-em', 'leanprover-community-bot-assistant', 'mathlib4-dependent-issues-bot'] nobody
126-26996
4 months ago
306-4136
306 days ago
88-84229
88 days
31348 PatrickMassot
author:PatrickMassot
 chore: fix a docstring typo --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) documentation awaiting-author t-analysis 1/1 Mathlib/Analysis/Calculus/Darboux.lean 1 3 ['ADedecker', 'dopamine333', 'github-actions'] nobody
126-22939
4 months ago
196-29411
196 days ago
0-21655
6 hours
10991 thorimur
author:thorimur
 feat: `tfae` block tactic This PR introduces `tfae` block tactic syntax: ```lean tfae 1 → 2 := /- proof of `P₁ → P₂` -/ 2 → 3 := /- proof of `P₂ → P₃` -/ 3 → 1 := /- proof of `P₃ → P₁` -/ ``` Like the recent change to `tfae_have`, this syntax also supports all sorts of matching that `have` itself supports: ```lean tfae 2 → 3 | h₂ => /- proof of `P₃` -/ 3 → 1 -- given `P₁ := ∀(a : A), (b : B), (c : C), X`: | h₃, a, b, c => /- proof of `X` -/ ⟨h_mp, h_mpr⟩ : 1 ↔ 2 := /- proof of `P₁ ↔ P₂`; puts `h_mp : P₁ → P₂`, `h_mpr : P₂ → P₁` in the lctx -/ ``` This initial implementation is currently very simple, and relies on `tfae_have` and `tfae_finish`. Although we intend to migrate away from that syntax, this PR does not remove support for it or deprecate `tfae_have`/`tfae_finish` in any way; migration (but not deprecation) is done in #11003. --- - [x] depends on: #10653 - [x] depends on: #10994 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict WIP modifies-tactic-syntax t-meta 392/124 Mathlib/Tactic/TFAE.lean,scripts/noshake.json,test/tfae.lean 3 5 ['github-actions', 'joneugster', 'mathlib4-dependent-issues-bot', 'thorimur'] joneugster
assignee:joneugster
126-12869
4 months ago
609-63138
609 days ago
7-13967
7 days
34195 eric-wieser
author:eric-wieser
 feat: continuous bundled actions These are `Continuous` versions of existing definitions. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-topology t-algebra large-import
label:t-algebra$
 59/0 Mathlib/Topology/Algebra/ContinuousMonoidHom.lean 1 1 ['github-actions'] nobody
121-48420
4 months ago
65-8545
65 days ago
0-1929
32 minutes
21476 grunweg
author:grunweg
 feat(lint-style): enable running on downstream projects Enable lint-style to run on downstream projects, by making the following modifications: - allow passing an explicit list of libraries to lint: if nothing is passed, it lints `Mathlib`, `Archive` and `Counterexamples` (as before); otherwise, it lints precisely the passed modules - only check init imports, undocumented scripts and the errors from `lint-style.py` when linting Mathlib - make the style exceptions file configurable and optional: using the `nolints-file` flag, the exceptions file can be configured. If the flag is omitted, we try to find a file at `scripts/nolints-style.txt` --- and otherwise proceed with no style exceptions. This means mathlib can continue unchanged, and downstream projects can either add an explicit exceptions file, or proceed without any exceptions. After this PR, one should be able to run lint-style on a downstream project by `lake exe lint-style ProjectName`. Prompted by [this zulip discussion](https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/lint-style.20for.20downstream.20libraries). --- - [x] depends on: #24570 - [x] depends on: #24953 (I did not test the last part.) [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-linter awaiting-author please-adopt 58/19 Mathlib/Tactic/Linter/TextBased.lean,scripts/lint-style.lean 2 21 ['Vierkantor', 'adomani', 'github-actions', 'grunweg', 'joneugster', 'leanprover-community-bot-assistant', 'mathlib4-dependent-issues-bot'] nobody
119-46731
3 months ago
371-21064
371 days ago
43-17409
43 days
12879 grunweg
author:grunweg
 feat: port ge_or_gt linter from mathlib3 Code works and is essentially green: next step is to split up into separate PRs. Feedback welcome on whether: - all the test changes are good, or I should simply allow it in more cases - if calc blocks need to be explicitly exempt --- - [ ] depends on: #12933 - [ ] depends on: #12934 - [ ] depends on: #12931 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-linter tech debt blocked-by-other-PR 736/319 Archive/Imo/Imo1960Q1.lean,Archive/Imo/Imo1962Q1.lean,Archive/Imo/Imo1988Q6.lean,Archive/Imo/Imo1994Q1.lean,Archive/Imo/Imo2001Q2.lean,Archive/Imo/Imo2005Q3.lean,Archive/Imo/Imo2006Q3.lean,Archive/Imo/Imo2008Q2.lean,Archive/Imo/Imo2008Q3.lean,Archive/Imo/Imo2008Q4.lean,Archive/Imo/Imo2011Q5.lean,Archive/Imo/Imo2019Q4.lean,Archive/Sensitivity.lean,Archive/Wiedijk100Theorems/AreaOfACircle.lean,Archive/Wiedijk100Theorems/BallotProblem.lean,Archive/Wiedijk100Theorems/BirthdayProblem.lean,Archive/Wiedijk100Theorems/CubingACube.lean,Mathlib.lean,Mathlib/Algebra/DualNumber.lean,Mathlib/Algebra/Order/CauSeq/BigOperators.lean,Mathlib/Algebra/Order/Field/Basic.lean,Mathlib/Algebra/Order/Ring/Defs.lean,Mathlib/Algebra/Polynomial/Basic.lean,Mathlib/Algebra/Polynomial/Degree/Definitions.lean,Mathlib/Algebra/Star/CHSH.lean,Mathlib/Analysis/Analytic/Basic.lean,Mathlib/Analysis/Calculus/UniformLimitsDeriv.lean,Mathlib/Analysis/Complex/Hadamard.lean,Mathlib/Analysis/Complex/UpperHalfPlane/Basic.lean,Mathlib/Analysis/InnerProductSpace/Projection.lean,Mathlib/Analysis/Normed/Group/ControlledClosure.lean,Mathlib/Analysis/NormedSpace/MStructure.lean,Mathlib/Analysis/SpecialFunctions/Log/Base.lean,Mathlib/Analysis/SpecialFunctions/Trigonometric/Basic.lean,Mathlib/Combinatorics/SimpleGraph/DegreeSum.lean,Mathlib/Combinatorics/SimpleGraph/LapMatrix.lean,Mathlib/Computability/AkraBazzi/AkraBazzi.lean,Mathlib/Computability/AkraBazzi/GrowsPolynomially.lean,Mathlib/Data/Complex/Basic.lean,Mathlib/Data/FP/Basic.lean,Mathlib/Data/Finset/Basic.lean,Mathlib/Data/Finset/Fold.lean,Mathlib/Data/Finsupp/Notation.lean,Mathlib/Data/Int/Lemmas.lean,Mathlib/Data/Nat/Dist.lean,Mathlib/Data/Nat/Lattice.lean,Mathlib/Data/Nat/Parity.lean,Mathlib/Data/Nat/Upto.lean,Mathlib/Data/Ordmap/Ordset.lean,Mathlib/Data/PNat/Basic.lean,Mathlib/Data/UInt.lean,Mathlib/GroupTheory/Coxeter/Length.lean,Mathlib/MeasureTheory/Constructions/Polish.lean,Mathlib/MeasureTheory/Covering/Besicovitch.lean,Mathlib/MeasureTheory/Covering/Vitali.lean,Mathlib/MeasureTheory/Covering/VitaliFamily.lean,Mathlib/MeasureTheory/Integral/Layercake.lean,Mathlib/NumberTheory/LegendreSymbol/JacobiSymbol.lean,Mathlib/NumberTheory/Padics/Hensel.lean,Mathlib/NumberTheory/Padics/PadicNorm.lean,Mathlib/NumberTheory/PellMatiyasevic.lean,Mathlib/NumberTheory/Rayleigh.lean,Mathlib/Order/Filter/AtTopBot.lean,Mathlib/Probability/Process/Stopping.lean,Mathlib/RingTheory/Adjoin/Basic.lean,Mathlib/RingTheory/Polynomial/Basic.lean,Mathlib/SetTheory/Ordinal/Notation.lean,Mathlib/Tactic.lean,Mathlib/Tactic/CancelDenoms/Core.lean,Mathlib/Tactic/Common.lean,Mathlib/Tactic/IntervalCases.lean,Mathlib/Tactic/Linarith/Datatypes.lean,Mathlib/Tactic/Linarith/Lemmas.lean,Mathlib/Tactic/Linarith/Oracle/FourierMotzkin.lean,Mathlib/Tactic/Linter/GeOrGt.lean,Mathlib/Tactic/Linter/Style.lean,Mathlib/Tactic/NormNum/GCD.lean,Mathlib/Tactic/NormNum/Inv.lean,Mathlib/Tactic/Ring/Basic.lean,Mathlib/Topology/Category/Profinite/Nobeling.lean,Mathlib/Topology/ContinuousFunction/Bounded.lean,Mathlib/Topology/MetricSpace/CauSeqFilter.lean,Mathlib/Topology/MetricSpace/Cauchy.lean,Mathlib/Topology/MetricSpace/Closeds.lean,Mathlib/Topology/Sequences.lean,scripts/lint-style.py,test/Explode.lean,test/GCongr/inequalities.lean,test/GeOrGt.lean,test/LibrarySearch/IsCompact.lean,test/LibrarySearch/basic.lean,test/Recall.lean,test/Rify.lean,test/Use.lean,test/cancel_denoms.lean,test/congr.lean,test/delabLinearIndependent.lean,test/delaborators.lean,test/interval_cases.lean,test/linarith.lean 109 4 ['github-actions', 'grunweg', 'urkud'] nobody
116-4312
3 months ago
737-5306
737 days ago
0-15256
4 hours
8608 eric-wieser
author:eric-wieser
 feat: multiplicativize `AddTorsor` --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict WIP t-algebra please-adopt
label:t-algebra$
 268/199 Mathlib/Algebra/AddTorsor.lean,Mathlib/Algebra/Group/Defs.lean,Mathlib/Data/Set/Pointwise/SMul.lean,Mathlib/Tactic/ToAdditive.lean 4 2 ['alreadydone'] nobody
114-77590
3 months ago
unknown
0-0
0 seconds
24100 eric-wieser
author:eric-wieser
 feat: restore some explicit binders from Lean 3 Part of #24099 --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict awaiting-author tech debt t-topology t-algebra
label:t-algebra$
 39/42 Mathlib/Data/FinEnum.lean,Mathlib/FieldTheory/Galois/Profinite.lean,Mathlib/Topology/Bases.lean,Mathlib/Topology/Compactness/CompactlyGeneratedSpace.lean,Mathlib/Topology/MetricSpace/IsometricSMul.lean,Mathlib/Topology/Metrizable/CompletelyMetrizable.lean,Mathlib/Topology/Metrizable/Uniformity.lean,Mathlib/Topology/Order.lean,Mathlib/Topology/Order/LowerUpperTopology.lean,Mathlib/Topology/UniformSpace/UniformEmbedding.lean 10 3 ['github-actions', 'grunweg', 'leanprover-community-bot-assistant'] nobody
111-377
3 months ago
401-78380
401 days ago
0-954
15 minutes
25474 adomani
author:adomani
 test for .lean/.md check A test PR for #25473. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-linter file-removed WIP 10/1 .github/workflows/lint_and_suggest_pr.yml,Mathlib.lean,Mathlib/NumberTheory/NumberField/CMField.Lean 3 2 ['github-actions', 'leanprover-community-bot-assistant'] nobody
110-31528
3 months ago
351-43574
351 days ago
0-907
15 minutes
33991 grunweg
author:grunweg
 test: pretty-printing of class abbrev Lake build fails with an error in batteries: what am I doing wrong? --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict file-removed large-import WIP 118/303 .github/workflows/daily.yml,Mathlib.lean,Mathlib/Algebra/Group/Action/TransferInstance.lean,Mathlib/Algebra/Group/TypeTags/Basic.lean,Mathlib/Algebra/Notation/Defs.lean,Mathlib/Algebra/Notation/Lemmas.lean,Mathlib/Algebra/Notation/Pi/Defs.lean,Mathlib/Algebra/Notation/Prod.lean,Mathlib/Algebra/Order/Group/Defs.lean,Mathlib/Algebra/Order/Group/Unbundled/Basic.lean,Mathlib/CategoryTheory/Limits/Yoneda.lean,Mathlib/Data/Finite/Defs.lean,Mathlib/Data/Int/Cast/Pi.lean,Mathlib/Data/Int/Init.lean,Mathlib/Data/List/Flatten.lean,Mathlib/Data/List/GetD.lean,Mathlib/Data/List/Indexes.lean,Mathlib/Data/Multiset/Defs.lean,Mathlib/Data/Nat/Basic.lean,Mathlib/Data/Nat/Bits.lean,Mathlib/Data/Nat/Init.lean,Mathlib/GroupTheory/GroupAction/SubMulAction/OfFixingSubgroup.lean,Mathlib/Lean/Meta/Simp.lean,Mathlib/Order/BoundedOrder/Basic.lean,Mathlib/Order/GaloisConnection/Defs.lean,Mathlib/Order/Monotone/Defs.lean,Mathlib/RingTheory/Valuation/Discrete/Basic.lean,Mathlib/SetTheory/Cardinal/Defs.lean,Mathlib/Tactic/Common.lean,Mathlib/Tactic/FunProp/Decl.lean,Mathlib/Tactic/Linter/DirectoryDependency.lean,Mathlib/Tactic/NormNum/Core.lean,Mathlib/Tactic/Positivity/Core.lean,Mathlib/Tactic/Push/Attr.lean,Mathlib/Tactic/Widget/LibraryRewrite.lean,Mathlib/Topology/Defs/Basic.lean,Mathlib/Util/AssertExists.lean,MathlibTest/AssertExists.lean,MathlibTest/CalcQuestionMark.lean,MathlibTest/DeprecatedSyntaxLinter.lean,MathlibTest/DirectoryDependencyLinter/Test.lean,MathlibTest/EmptyLine.lean,MathlibTest/ExtractGoal.lean,MathlibTest/HaveLetLinter.lean,MathlibTest/LibrarySearch/IsCompact.lean,MathlibTest/LintStyle.lean,MathlibTest/TacticAnalysis.lean,MathlibTest/UnusedInstancesInType.lean,MathlibTest/Util/PrintSorries.lean,MathlibTest/WhitespaceLinter.lean,MathlibTest/aesop_cat.lean,MathlibTest/eqns.lean,MathlibTest/fast_instance.lean,MathlibTest/globalAttributeIn.lean,MathlibTest/hintAll.lean,MathlibTest/jacobiSym.lean,MathlibTest/slim_check.lean,MathlibTest/toAdditive.lean,lake-manifest.json,lakefile.lean,lean-toolchain 61 2 ['github-actions', 'mathlib4-merge-conflict-bot'] nobody
110-31471
3 months ago
127-46156
127 days ago
0-111
1 minute
31110 bryangingechen
author:bryangingechen
 ci: don't delete merged branches This will only affect PRs that are not from forks (e.g. this one). The motivation is that #30913 was closed automatically due to its target branch deleted after #30912 was merged. See also [#PR reviews > #30913 feat(Computability/Language):add subtraction notation @ 💬](https://leanprover.zulipchat.com/#narrow/channel/144837-PR-reviews/topic/.2330913.20feat.28Computability.2FLanguage.29.3Aadd.20subtraction.20notation/near/548052556). Looking at the history, it looks like this option hasn't been changed since we added bors to mathlib3: https://github.com/leanprover-community/mathlib3/pull/2322 --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) awaiting-author CI merge-conflict 1/1 bors.toml 1 5 ['bryangingechen', 'eric-wieser', 'github-actions', 'mathlib4-merge-conflict-bot', 'urkud'] nobody
110-31215
3 months ago
203-13230
203 days ago
0-64677
17 hours
9820 jjaassoonn
author:jjaassoonn
 feat(RingTheory/GradedAlgebra/HomogeneousIdeal): generalize to homogeneous submodule The definitions, constructions and theorems in `HomogeneousIdeal.lean` are generalized to a homogeneous submodules. So say $R$ is a ring and $M \cong \bigoplus_{i} M_i$ is an $R$-module. Then a homogeneous $R$-submodule of $M$ is an $R$-submodule $N$ such that for all $i$ and $n \in N$, $n_i \in N$. Note that this notion doesn't actually require $R$ to be graded and $M$ is a graded module. But for more interesting lemmas, we do need that $M$ is graded $R$-module. We bake the fact $R$ is graded into the definition of homogeneous submodule, otherwise, `CompleteLattice HomogeneousSubmodule` cannot find the order of synthesis (the proof depends on that $R$ is graded) All definitions/constructions/theorems have a copy for ideals as well, this is to make sure dot notation still works. The motivation of this generalization is graded quotient module --- - [x] depends on:#18728 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-ring-theory 516/185 Mathlib/Algebra/Module/GradedModule.lean,Mathlib/AlgebraicGeometry/ProjectiveSpectrum/Scheme.lean,Mathlib/AlgebraicGeometry/ProjectiveSpectrum/Topology.lean,Mathlib/RingTheory/GradedAlgebra/Homogeneous/Ideal.lean,Mathlib/RingTheory/GradedAlgebra/Homogeneous/Submodule.lean,Mathlib/RingTheory/GradedAlgebra/Radical.lean,scripts/nolints_prime_decls.txt 7 3 ['github-actions', 'leanprover-community-bot-assistant'] nobody
102-44431
3 months ago
321-67672
321 days ago
52-59768
52 days
14501 jjaassoonn
author:jjaassoonn
 feat: module structure of filtered colimit of abelian groups over filtered colimit of rings This helps defining the module structure of stalks This contribution was inspired by the AIM workshop "Formalizing algebraic geometry" in June 2024. --- - [x] depends on: #15315 [I am going to move the result in the new file] [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra workshop-AIM-AG-2024 t-category-theory merge-conflict awaiting-author
label:t-algebra$
 439/2 Mathlib/CategoryTheory/Limits/ConcreteCategory/Basic.lean,Mathlib/CategoryTheory/Limits/ConcreteCategory/WithAlgebraicStructures.lean 2 49 ['YaelDillies', 'adamtopaz', 'alreadydone', 'erdOne', 'github-actions', 'jjaassoonn', 'joelriou', 'kbuzzard'] joelriou
assignee:joelriou
101-37012
3 months ago
542-25280
542 days ago
64-30806
64 days
25035 ScottCarnahan
author:ScottCarnahan
 feat(Algebra/Module/Equiv/Defs): linear equivalence between linear hom and semilinear hom Given a ring homomorphism `σ₂ : R →+* R₂`, an `R`-module `M`, and a module `M₂` for both `R` and `R₂` satisfying `SMulCommClass R R₂ M₂` and `(σ₂ r) • x = r • x`, we produce an `R₂`-linear equivalence between `M →ₗ[R] M₂` and `M →ₛₗ[σ₂] M₂`. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) WIP t-algebra merge-conflict
label:t-algebra$
 21/0 Mathlib/Algebra/Module/Equiv/Defs.lean 1 2 ['github-actions', 'mathlib-merge-conflicts'] nobody
101-3910
3 months ago
347-53868
347 days ago
20-7584
20 days
34931 eric-wieser
author:eric-wieser
 perf: make TensorProduct.lift irreducible with a unification hint --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra merge-conflict
label:t-algebra$
 6/2 Mathlib/LinearAlgebra/TensorProduct/Basic.lean 1 7 ['eric-wieser', 'github-actions', 'leanprover-radar', 'mathlib-merge-conflicts'] erdOne
assignee:erdOne
99-12451
3 months ago
99-12452
99 days ago
5-66655
5 days
23042 joneugster
author:joneugster
 feat(CategoryTheory/Enriched/Limits): add HasConicalLimitsOfSize.shrink --- Note: I've marked this "WIP" because I'm not yet sure when this will be needed and I'd probably put the PR on the queue once I've created some follow-up needing it. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) WIP t-category-theory infinity-cosmos please-adopt 22/1 Mathlib/CategoryTheory/Enriched/Limits/HasConicalLimits.lean 1 1 ['github-actions'] nobody
96-67540
3 months ago
430-44040
430 days ago
0-1
1 second
23142 joneugster
author:joneugster
 feat(CategoryTheory/Enriched/Limits): add API for HasConicalLimit --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) awaiting-author t-category-theory infinity-cosmos please-adopt 52/9 Mathlib/CategoryTheory/Enriched/Limits/HasConicalLimits.lean 1 2 ['github-actions', 'joelriou'] nobody
96-67540
3 months ago
427-47031
427 days ago
0-67788
18 hours
23145 joneugster
author:joneugster
 feat(CategoryTheory/Enriched/Limits): add IsConicalLimits --- - [ ] depends on: #23142 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict blocked-by-other-PR t-category-theory infinity-cosmos please-adopt 221/9 Mathlib.lean,Mathlib/CategoryTheory/Enriched/Limits/HasConicalLimits.lean,Mathlib/CategoryTheory/Enriched/Limits/IsConicalLimit.lean 3 3 ['github-actions', 'joelriou', 'mathlib4-dependent-issues-bot'] nobody
96-67539
3 months ago
428-28141
428 days ago
0-370
6 minutes
20401 RemyDegenne
author:RemyDegenne
 feat: add sigmaFinite_iUnion ```lean lemma sigmaFinite_iUnion (μ : Measure α) {s : ℕ → Set α} (h_meas : MeasurableSet (⋃ n, s n)) [∀ n, SigmaFinite (μ.restrict (s n))] : SigmaFinite (μ.restrict (⋃ n, s n)) ``` --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict awaiting-author t-measure-probability 37/28 Mathlib/MeasureTheory/Decomposition/Exhaustion.lean,Mathlib/MeasureTheory/Measure/Typeclasses.lean 2 6 ['RemyDegenne', 'github-actions', 'sgouezel', 'urkud'] nobody
96-50611
3 months ago
504-38127
504 days ago
0-73190
20 hours
11500 mcdoll
author:mcdoll
 refactor(Topology/Algebra/Module/WeakDual): Clean up - Move `Dual` and `dualPairing` lower in the import-hierachy - deduplicate `dualPairing` - Bundle continuity statements to `CLM`s. - Make `WeakDual` and `WeakSpace` reducible - Remove `refine'` in favor of `refine` --- Cleaning up `Analysis/NormedSpace/WeakDual` will be done in a second PR [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict awaiting-author t-topology 227/179 Mathlib.lean,Mathlib/Analysis/Fourier/RiemannLebesgueLemma.lean,Mathlib/Analysis/InnerProductSpace/Adjoint.lean,Mathlib/Analysis/InnerProductSpace/Dual.lean,Mathlib/Analysis/LocallyConvex/Polar.lean,Mathlib/Analysis/NormedSpace/Dual.lean,Mathlib/Analysis/NormedSpace/WeakDual.lean,Mathlib/Analysis/VonNeumannAlgebra/Basic.lean,Mathlib/MeasureTheory/Function/AEEqOfIntegral.lean,Mathlib/MeasureTheory/Measure/FiniteMeasure.lean,Mathlib/Topology/Algebra/Module/CharacterSpace.lean,Mathlib/Topology/Algebra/Module/Dual.lean,Mathlib/Topology/Algebra/Module/WeakDual.lean,docs/overview.yaml,docs/undergrad.yaml 15 16 ['ADedecker', 'grunweg', 'j-loreaux', 'kkytola', 'mathlib-bors', 'mcdoll', 'urkud'] nobody
96-27998
3 months ago
745-27198
745 days ago
46-5571
46 days
20428 madvorak
author:madvorak
 feat(Data/Sign): lemmas about `∈ Set.range SignType.cast` --- Perhaps `in_set_range_singType_cast_iff_abs` needs to be moved somewhere downstream. merge-conflict WIP t-data 40/0 Mathlib/Data/Sign.lean 1 13 ['eric-wieser', 'github-actions', 'leanprover-community-bot-assistant', 'madvorak', 'urkud'] nobody
96-27826
3 months ago
unknown
0-0
0 seconds
16553 grunweg
author:grunweg
 WIP: tinkering with orientable manifolds - wait for #33307 to get merged - PR the "normed space" part separately - WIP: a linear isomorphism on a connected set is either orientation-preserving or orientation-preserving: some form of this was merged into mathlib recently; TODO update this PR accordingly! - [ ] depends on: #33307 - [x] depends on: #8738 --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict WIP t-differential-geometry blocked-by-other-PR 287/0 Mathlib.lean,Mathlib/Geometry/Manifold/Instances/Sphere.lean,Mathlib/Geometry/Manifold/Orientable.lean 3 3 ['github-actions', 'mathlib-dependent-issues', 'mathlib4-merge-conflict-bot'] nobody
94-82693
3 months ago
unknown
0-0
0 seconds
24965 erdOne
author:erdOne
 refactor: Make `IsLocalHom` take unbundled map Under the current definition, `IsLocalHom f` and `IsLocalHom f.toMonoidHom` are not defeq, which causes quite some annoyances. We also have a consensus to not use `*HomClass` in definitions. As a result, we change `IsLocalHom` to take an unbundled function instead of a funlike. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra delegated merge-conflict
label:t-algebra$
 18/9 Mathlib/Algebra/Group/Units/Hom.lean,Mathlib/AlgebraicGeometry/Scheme.lean,Mathlib/Geometry/RingedSpace/LocallyRingedSpace.lean,Mathlib/Geometry/RingedSpace/OpenImmersion.lean,Mathlib/RingTheory/LocalRing/ResidueField/Basic.lean 5 15 ['adomani', 'alreadydone', 'erdOne', 'eric-wieser', 'github-actions', 'jcommelin', 'leanprover-community-bot-assistant', 'mathlib-bors', 'mathlib-merge-conflicts', 'mathlib4-merge-conflict-bot', 'vihdzp'] mattrobball
assignee:mattrobball
93-80829
3 months ago
185-46598
185 days ago
24-84527
24 days
25622 eric-wieser
author:eric-wieser
 refactor: overhaul instances on LocalizedModule This: * Generalizes the `SMul`, `Module`, and `Algebra` instances via appropriate compatibility conditions * Generalizes the `Mul` instance to the non-unital setting * Fixes instances diamonds for the `Nat`- and `Int`-actions --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra merge-conflict
label:t-algebra$
 214/100 Mathlib/Algebra/Module/LocalizedModule/Basic.lean 1 6 ['erdOne', 'eric-wieser', 'github-actions', 'leanprover-community-bot-assistant', 'mathlib-merge-conflicts'] nobody
93-80826
3 months ago
unknown
0-0
0 seconds
34075 eric-wieser
author:eric-wieser
 feat: add a typeclass for the continuum hypothesis This allows a proof from the Archive to be promoted to mathlib itself. The proof strategy of `iff_exists_sierpinski_pathological_pred` was written almost entirely with public Gemini 3 Thinking, and then manually corrected. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-set-theory merge-conflict awaiting-author 200/58 Counterexamples/Phillips.lean,Mathlib.lean,Mathlib/SetTheory/Cardinal/ContinuumHypothesis.lean,Mathlib/Tactic/Linter/DirectoryDependency.lean 3 27 ['b-mehta', 'eric-wieser', 'github-actions', 'grunweg', 'mathlib-merge-conflicts', 'plp127', 'vihdzp'] nobody
93-57152
3 months ago
41-82331
41 days ago
0-44643
12 hours
12933 grunweg
author:grunweg
 chore: replace some use of > or ≥ by < or ≤ These were flagged by the linter in #12879: it is easy to simple avoid > or ≥ in hypotheses or `have`s. --- - [x] depends on: #35346 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict awaiting-author 123/123 Archive/Imo/Imo1960Q1.lean,Archive/Imo/Imo1962Q1.lean,Archive/Imo/Imo1988Q6.lean,Archive/Imo/Imo2005Q3.lean,Archive/Imo/Imo2008Q2.lean,Archive/Imo/Imo2008Q4.lean,Archive/Imo/Imo2011Q5.lean,Archive/Imo/Imo2019Q4.lean,Archive/Wiedijk100Theorems/AreaOfACircle.lean,Archive/Wiedijk100Theorems/BallotProblem.lean,Mathlib/Algebra/DualNumber.lean,Mathlib/Algebra/Order/CauSeq/BigOperators.lean,Mathlib/Algebra/Order/Ring/Defs.lean,Mathlib/Algebra/Polynomial/Basic.lean,Mathlib/Algebra/Polynomial/Degree/Definitions.lean,Mathlib/Algebra/Star/CHSH.lean,Mathlib/Analysis/Analytic/Basic.lean,Mathlib/Analysis/Calculus/UniformLimitsDeriv.lean,Mathlib/Analysis/Complex/Hadamard.lean,Mathlib/Analysis/Complex/UpperHalfPlane/Basic.lean,Mathlib/Analysis/InnerProductSpace/Projection.lean,Mathlib/Analysis/Normed/Group/ControlledClosure.lean,Mathlib/Analysis/SpecialFunctions/Log/Base.lean,Mathlib/Analysis/SpecialFunctions/Trigonometric/Basic.lean,Mathlib/Combinatorics/SimpleGraph/DegreeSum.lean,Mathlib/Combinatorics/SimpleGraph/LapMatrix.lean,Mathlib/Data/Complex/Basic.lean,Mathlib/Data/FP/Basic.lean,Mathlib/Data/Finset/Basic.lean,Mathlib/Data/Finsupp/Notation.lean,Mathlib/Data/Nat/Dist.lean,Mathlib/Data/Nat/Lattice.lean,Mathlib/Data/Nat/Parity.lean,Mathlib/Data/Ordmap/Ordset.lean,Mathlib/Data/PNat/Basic.lean,Mathlib/Data/UInt.lean,Mathlib/GroupTheory/Coxeter/Length.lean,Mathlib/MeasureTheory/Constructions/Polish.lean,Mathlib/MeasureTheory/Covering/Besicovitch.lean,Mathlib/MeasureTheory/Covering/Vitali.lean,Mathlib/MeasureTheory/Covering/VitaliFamily.lean,Mathlib/MeasureTheory/Integral/Layercake.lean,Mathlib/NumberTheory/LegendreSymbol/JacobiSymbol.lean,Mathlib/NumberTheory/Padics/Hensel.lean,Mathlib/NumberTheory/Padics/PadicNorm.lean,Mathlib/NumberTheory/PellMatiyasevic.lean,Mathlib/NumberTheory/Rayleigh.lean,Mathlib/Probability/Process/Stopping.lean,Mathlib/Tactic/CancelDenoms/Core.lean,Mathlib/Tactic/IntervalCases.lean,Mathlib/Tactic/Linarith/Lemmas.lean,Mathlib/Tactic/Linarith/Oracle/FourierMotzkin.lean,Mathlib/Tactic/NormNum/GCD.lean,Mathlib/Tactic/NormNum/Inv.lean,Mathlib/Tactic/Ring/Basic.lean,Mathlib/Topology/Category/Profinite/Nobeling.lean,Mathlib/Topology/ContinuousFunction/Bounded.lean,Mathlib/Topology/MetricSpace/CauSeqFilter.lean,Mathlib/Topology/Sequences.lean,test/LibrarySearch/basic.lean,test/Use.lean,test/cancel_denoms.lean,test/linarith.lean,test/norm_cast.lean 64 7 ['YaelDillies', 'github-actions', 'grunweg', 'mathlib-dependent-issues'] nobody
89-62178
3 months ago
736-46057
736 days ago
0-55656
15 hours
20238 maemre
author:maemre
 feat(Computability/DFA): Closure of regular languages under some set operations This shows that regular languages are closed under complement and intersection by constructing DFAs for them. --- Closure under all other operations will be proved when someone adds the proof for DFA<->regular expression equivalence, so they are not part of this PR. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor t-computability merge-conflict awaiting-author awaiting-zulip 159/0 Mathlib/Computability/DFA.lean,Mathlib/Computability/Language.lean 2 60 ['EtienneC30', 'YaelDillies', 'github-actions', 'maemre', 'mathlib4-merge-conflict-bot', 'meithecatte', 'urkud'] nobody
85-45140
2 months ago
431-23079
431 days ago
48-67492
48 days
22361 rudynicolop
author:rudynicolop
 feat(Computability/NFA): nfa closure properties Add the closure properties union, intersection and reversal for NFA. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor t-computability merge-conflict awaiting-author awaiting-zulip 218/2 Mathlib/Computability/Language.lean,Mathlib/Computability/NFA.lean 2 91 ['EtienneC30', 'b-mehta', 'ctchou', 'github-actions', 'leanprover-community-bot-assistant', 'meithecatte', 'rudynicolop'] nobody
85-45124
2 months ago
382-27018
382 days ago
39-60525
39 days
23929 meithecatte
author:meithecatte
 feat(Computability/NFA): improve bound on pumping lemma --- - [x] depends on: #25321 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-computability awaiting-zulip new-contributor awaiting-author 101/10 Mathlib/Computability/EpsilonNFA.lean,Mathlib/Computability/NFA.lean 2 42 ['YaelDillies', 'dagurtomas', 'github-actions', 'leanprover-community-bot-assistant', 'mathlib4-dependent-issues-bot', 'meithecatte'] nobody
84-65153
2 months ago
349-8052
349 days ago
34-10092
34 days
8102 miguelmarco
author:miguelmarco
 feat(Tactic): add `unify_denoms` and `collect_signs` tactics This PR adds four new tactics: - `unify_denoms` tries to put expressions with several divisions in a form with only one division. In the case of fields, it works similarly to `field_simp`, but if the hypothesis about denominators being nonzero are not present, it assumes them, and leaves them as new goals to prove. In that sense, it is an "unsafe" tactic (but can be useful nevertheless, for example when you can't find which exact hypothesis is missing). It also works with expressions of naturals and Euclidean domains, assuming the corresponding hypothesis about the denominators dividing the numerators. - `unify_denoms!` extends `unify_denoms` to work with (in)equalities, assuming also that the denominators, once in normal form, are positive. - `collect_signs` works similarly with expressions using sums and substractions: it tries to put them in a form of one sum minus other sum. In the case of working with naturals, it assumes that we never substract a bigger number from a smaller one. Both are implemented essentially as a macro that combines several rewriting rules. Some new lemmas with the corresponding rules are added. --- please-adopt new-contributor merge-conflict modifies-tactic-syntax good first issue t-meta 407/0 Mathlib.lean,Mathlib/Algebra/EuclideanDomain/Basic.lean,Mathlib/Tactic.lean,Mathlib/Tactic/CollectSigns.lean,Mathlib/Tactic/UnifyDenoms.lean,MathlibTest/unify_denoms.lean,scripts/noshake.json 7 55 ['Paul-Lez', 'YaelDillies', 'github-actions', 'joneugster', 'kbuzzard', 'mathlib4-merge-conflict-bot', 'miguelmarco'] nobody
84-29451
2 months ago
373-11923
373 days ago
17-14109
17 days
15355 adomani
author:adomani
 feat: MiM PR report --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) WIP merge-conflict 193/0 .github/workflows/monthly_pr_report.yaml,scripts/README.md,scripts/find_labels.sh 3 18 ['YaelDillies', 'adomani', 'github-actions', 'mathlib-merge-conflicts', 'vihdzp'] nobody
81-14820
2 months ago
unknown
0-0
0 seconds
22464 adomani
author:adomani
 feat(CI): declarations diff in Lean Rewrites the `declaration_diff` script in Lean. You can see the effect of the new script in the testing branch #22497. The new CI step runs in approximately 5mins, but is separate from the `build` step. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) awaiting-author CI merge-conflict 151/0 .github/workflows/PR_summary_lean.yml,scripts/README.md,scripts/declarations_diff.lean,scripts/declarations_diff_lean_shell_glue.sh 4 8 ['bryangingechen', 'github-actions', 'grunweg', 'j-loreaux', 'mathlib-merge-conflicts'] nobody
81-13225
2 months ago
297-80891
297 days ago
146-23496
146 days
35547 Ruben-VandeVelde
author:Ruben-VandeVelde
 chore: tidy various files --- As usual, `simp`s didn't seem slow. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) awaiting-author merge-conflict 83/117 Mathlib/Algebra/Group/Int/Defs.lean,Mathlib/Algebra/LinearRecurrence.lean,Mathlib/Algebra/Order/Ring/Unbundled/Basic.lean,Mathlib/AlgebraicGeometry/AffineScheme.lean,Mathlib/AlgebraicGeometry/Morphisms/Smooth.lean,Mathlib/AlgebraicGeometry/Properties.lean,Mathlib/AlgebraicGeometry/ZariskisMainTheorem.lean,Mathlib/Analysis/Complex/CoveringMap.lean,Mathlib/Analysis/Complex/MeanValue.lean,Mathlib/CategoryTheory/Comma/Over/Basic.lean,Mathlib/Data/NNReal/Basic.lean,Mathlib/Data/Set/Dissipate.lean,Mathlib/Data/Set/PowersetCard.lean,Mathlib/Geometry/Euclidean/Angle/Bisector.lean,Mathlib/LinearAlgebra/DirectSum/Finsupp.lean,Mathlib/LinearAlgebra/JordanChevalley.lean,Mathlib/MeasureTheory/Measure/PreVariation.lean,Mathlib/MeasureTheory/Measure/SubFinite.lean,Mathlib/MeasureTheory/VectorMeasure/Variation/Defs.lean,Mathlib/Order/ConditionallyCompletePartialOrder/Indexed.lean,Mathlib/Probability/Distributions/Cauchy.lean,Mathlib/RingTheory/Etale/QuasiFinite.lean,Mathlib/RingTheory/Ideal/Pointwise.lean,Mathlib/RingTheory/Polynomial/Subring.lean,Mathlib/RingTheory/Smooth/IntegralClosure.lean,Mathlib/RingTheory/UniqueFactorizationDomain/ClassGroup.lean,Mathlib/RingTheory/Unramified/LocalStructure.lean,Mathlib/RingTheory/ZariskisMainTheorem.lean,Mathlib/Tactic/ComputeAsymptotics/Multiseries/Corecursion.lean,Mathlib/Tactic/ComputeAsymptotics/Multiseries/Majorized.lean,Mathlib/Topology/Algebra/IsUniformGroup/Defs.lean,Mathlib/Topology/Algebra/MulAction.lean 32 14 ['github-actions', 'grunweg', 'mathlib-merge-conflicts', 'vihdzp'] nobody
77-79135
2 months ago
91-19912
91 days ago
0-67842
18 hours
34501 eric-wieser
author:eric-wieser
 chore(Data/Fintype/Induction): add a workaround for a bug in `induction` This works around leanprover/lean4#4246, as Zulip threads frequently run up against this. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) awaiting-author t-meta please-adopt 15/1 Mathlib/Data/Fintype/Option.lean 1 3 ['github-actions', 'joneugster'] joneugster
assignee:joneugster
77-45648
2 months ago
112-25991
112 days ago
2-59629
2 days
8479 alexjbest
author:alexjbest
 feat: use leaff in CI [Leaff](https://github.com/alexjbest/leaff) is an experimental lean-diff tool, this PR is to experiment with adding it as a CI step. --- I'm not sure yet if it is best to have this always run or only run on request (like bench). If it is always run should it post a comment or simply leave its output it the actions log (maybe as a summary object) the current iteration runs and updates a sticky comment with the latest result [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict WIP awaiting-author 340/0 .github/workflows/bors.yml,.github/workflows/build.yml,.github/workflows/build.yml.in,.github/workflows/build_fork.yml 4 13 ['alexjbest', 'fpvandoorn', 'github-actions', 'grunweg', 'kim-em', 'mathlib-bors', 'urkud'] nobody
77-35192
2 months ago
917-12566
917 days ago
0-26
26 seconds
13483 adomani
author:adomani
 feat: automatically replace deprecations This PR introduces `lake exe update_deprecations` that uses the cache to automatically replace deprecated declarations with the corresponding un-deprecated one. The script handles namespacing, replacing a possibly non-fully-qualified, deprecated name with the fully-qualified non-deprecated name. It is also possible to use ```bash lake exe update_deprecations --mods One.Two.Three,Dd.Ee.Ff ``` to limit the scope of the replacements to the modules `One.Two.Three` and `Dd.Ee.Ff`. This is intended to be a first step in automating updates: combining this with a linter that emits appropriate warnings, the functionality of `lake exe update_deprecations` can be extended to perform more complicated updates. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict awaiting-author t-meta 306/0 Mathlib.lean,Mathlib/Tactic.lean,Mathlib/Tactic/UpdateDeprecations.lean,MathlibTest/UpdateDeprecations.lean,lakefile.lean,scripts/README.md,scripts/update_deprecations.lean 7 18 ['YaelDillies', 'adomani', 'fpvandoorn', 'github-actions', 'j-loreaux', 'jcommelin', 'leanprover-community-bot-assistant', 'mathlib-bors', 'sgouezel'] joneugster
assignee:joneugster
77-35164
2 months ago
557-26270
557 days ago
34-80803
34 days
14313 grhkm21
author:grhkm21
 feat(RepresentationTheory/FdRep): FdRep is a full subcategory of Rep ``` /-- Equivalence between `FDRep` and the full subcategory of finite dimensional `Rep`. -/ def equivFiniteDimensional : FDRep k G ≌ FullSubcategory (fun V : Rep k G ↦ FiniteDimensional k V) ``` merge-conflict t-algebra t-category-theory new-contributor
label:t-algebra$
 47/8 Mathlib/RepresentationTheory/FDRep.lean 1 21 ['fpvandoorn', 'github-actions', 'grhkm21', 'joelriou', 'kim-em', 'mathlib-bors'] nobody
77-35141
2 months ago
670-1165
670 days ago
4-83177
4 days
14712 astrainfinita
author:astrainfinita
 perf: change instance priority and order about `OfNat` --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict slow-typeclass-synthesis t-algebra
label:t-algebra$
 49/20 Mathlib/Algebra/Group/Nat.lean,Mathlib/Algebra/Group/ZeroOne.lean,Mathlib/Algebra/Homology/Embedding/Basic.lean,Mathlib/Algebra/Tropical/Basic.lean,Mathlib/Data/BitVec.lean,Mathlib/Data/Nat/Cast/Defs.lean,Mathlib/Data/Rat/Defs.lean,Mathlib/Data/UInt.lean,Mathlib/NumberTheory/ArithmeticFunction.lean 9 26 ['MichaelStollBayreuth', 'astrainfinita', 'eric-wieser', 'fpvandoorn', 'github-actions', 'j-loreaux', 'leanprover-bot', 'mathlib-bors'] nobody
77-35122
2 months ago
652-13292
652 days ago
20-15089
20 days
17627 hrmacbeth
author:hrmacbeth
 feat: universal properties of vector bundle constructions Characterizations for the smoothness of maps into the total spaces of (1) the direct sum of two vector bundles; (2) the pullback of a vector bundle. This gap in the library was exposed by #17358. --- - [x] depends on: #22804 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-differential-geometry 311/9 Mathlib/Data/Bundle.lean,Mathlib/Geometry/Manifold/VectorBundle/Basic.lean,Mathlib/Geometry/Manifold/VectorBundle/Pullback.lean,Mathlib/Topology/FiberBundle/Constructions.lean 4 26 ['PatrickMassot', 'fpvandoorn', 'github-actions', 'grunweg', 'hrmacbeth', 'j-loreaux', 'leanprover-community-bot-assistant', 'mathlib-bors', 'mathlib4-dependent-issues-bot', 'sgouezel'] grunweg
assignee:grunweg
77-35110
2 months ago
337-34849
337 days ago
91-68302
91 days
19275 eric-wieser
author:eric-wieser
 fix: if nolint files change, do a full rebuild Otherwise CI will succeed when removing entries from the file, but fail later when someone changes something unrelated. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict 8/0 lakefile.lean 1 22 ['YaelDillies', 'adomani', 'eric-wieser', 'fpvandoorn', 'github-actions', 'grunweg', 'mathlib-bors'] nobody
77-35093
2 months ago
548-75728
548 days ago
0-214
3 minutes
24434 joelriou
author:joelriou
 feat(CategoryTheory): effectiveness of descent (This is very much a draft, it will be split in multiple PRs later.) Co-authored-by: Christian Merten [christian@merten.dev](mailto:christian@merten.dev) --- - [ ] depends on: #35452 - [ ] depends on: #35393 - [ ] depends on: #35396 - [ ] depends on: #35401 - [x] depends on: #24411 - [x] depends on: #24382 - [x] depends on: #25971 - [x] depends on: #13539 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict WIP t-category-theory 4052/66 Mathlib.lean,Mathlib/CategoryTheory/Bicategory/Adjunction/Adj.lean,Mathlib/CategoryTheory/Bicategory/Adjunction/BaseChange.lean,Mathlib/CategoryTheory/Bicategory/Adjunction/Basic.lean,Mathlib/CategoryTheory/Bicategory/Adjunction/Mate.lean,Mathlib/CategoryTheory/Bicategory/Functor/Cat.lean,Mathlib/CategoryTheory/Bicategory/Functor/LocallyDiscrete.lean,Mathlib/CategoryTheory/Bicategory/Functor/Strict.lean,Mathlib/CategoryTheory/Bicategory/Opposite.lean,Mathlib/CategoryTheory/CommSq.lean,Mathlib/CategoryTheory/Limits/Shapes/Pullback/CommSq.lean,Mathlib/CategoryTheory/Sites/Descent/DescentData.lean,Mathlib/CategoryTheory/Sites/Descent/DescentDataAsCoalgebra.lean,Mathlib/CategoryTheory/Sites/Descent/DescentDataDoublePrime.lean,Mathlib/CategoryTheory/Sites/Descent/DescentDataPrime.lean,Mathlib/CategoryTheory/Sites/Descent/IsPrestack.lean,Mathlib/CategoryTheory/Sites/Descent/IsStack.lean,Mathlib/CategoryTheory/Sites/Descent/ModuleCat.lean,Mathlib/CategoryTheory/Sites/Descent/PullbackStruct.lean 19 23 ['alreadydone', 'callesonne', 'chrisflav', 'github-actions', 'joelriou', 'leanprover-community-bot-assistant', 'mathlib-dependent-issues', 'yuma-mizuno'] nobody
77-16151
2 months ago
unknown
0-0
0 seconds
22366 kim-em
author:kim-em
 feat: `check_equalities` tactic for diagnosing defeq problems The `check_equalities` tactic, which checks the typing of equalities in the goal, reporting discrepancies between the implicit type argument of the equality, and the inferred types of the left and right hand sides, at "instances and reducible" transparency. Reports from this tactic do not necessarily indicate a problem, although typically `simp` should reduce rather than increase the reported discrepancies. `check_equalities` may be useful in diagnosing uses of `erw`. t-meta please-adopt WIP 123/4 Mathlib.lean,Mathlib/Tactic.lean,Mathlib/Tactic/Basic.lean,Mathlib/Tactic/CategoryTheory/CheckCompositions.lean,Mathlib/Tactic/CheckEqualities.lean,Mathlib/Tactic/Common.lean,MathlibTest/check_equalities.lean 7 21 ['adomani', 'b-mehta', 'eric-wieser', 'fpvandoorn', 'github-actions', 'grunweg', 'kim-em', 'mathlib-bors', 'mathlib4-merge-conflict-bot'] adamtopaz
assignee:adamtopaz
73-75798
2 months ago
60-37255
60 days ago
32-12136
32 days
35588 eric-wieser
author:eric-wieser
 chore(Util/Qq): remove `meta` These are wrappers of existing functions on `Expr`s which are also not marked `meta`. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-meta awaiting-CI delegated 7/7 Mathlib/Data/Multiset/Sort.lean,Mathlib/Tactic/FieldSimp/Lemmas.lean,Mathlib/Tactic/NormNum/Core.lean,Mathlib/Tactic/Order/ToInt.lean,Mathlib/Tactic/Simproc/Divisors.lean,Mathlib/Tactic/Simproc/FinsetInterval.lean,Mathlib/Util/Qq.lean 7 3 ['Vierkantor', 'github-actions', 'mathlib-bors'] nobody
72-53484
2 months ago
90-51420
90 days ago
0-35325
9 hours
14603 awueth
author:awueth
 feat: degree is invariant under graph isomorphism --- Mathlib has the definition `SimpleGraph.Iso.mapNeighborSet` which is an equivalence between neighbor sets induced by an isomorphism. Would it be beneficial to add the same equivalence for `neighborFinset`? [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) WIP t-combinatorics new-contributor 24/0 Mathlib/Combinatorics/SimpleGraph/Map/Finite.lean 1 12 ['SnirBroshi', 'awueth', 'github-actions', 'jcommelin', 'kim-em', 'urkud'] nobody
71-62025
2 months ago
648-22464
648 days ago
31-44440
31 days
9605 davikrehalt
author:davikrehalt
 feat(Data/Finset & List): Add Lemmas for Sorting and Filtering This PR includes several useful lemmas to the Data/Finset and Data/List modules in Lean's mathlib: 1. `toFinset_filter` (List): Shows that filtering commutes with toFinset. 2. `toFinset_is_singleton_implies_replicate` (List): Shows a list with a singleton toFinset is a List.replicate. 3. `filter_sort_commute` (Finset): Sorting and filtering can be interchanged in Finsets. 4. `Sorted.filter` (List): A sorted list stays sorted after filtering. 5. `Sorted.append_largest` (List): Appending the largest element keeps a list sorted. 6. `sort_monotone_map` (Finset): Relates sorting of a Finset after mapping to sorting of a list. 7. `sort_insert_largest` (Finset): Sorting a Finset with an inserted largest element. 8. `sort_range` (Finset): Sorting a range in a Finset equals the corresponding range list. 9. ~~`filter_eval_true` (List): Filtering a list with a predicate always true keeps the list unchanged.~~ 10. ~~`filter_eval_false` (List): Filtering with an always-false predicate gives an empty list.~~ 11. ~~`pairwise_concat` (List): Iff condition for Pairwise relation in concatenated lists (similar to pairwise_join).~~ 12. `list_map_toFinset` (Finset): toFinset commutes with map under injection --- - [x] depends on: #15952 This is my first PR to mathlib, so I'm not too familiar with etiquette's and more specifically there are two proofs in the PR which uses aesop, and I am not sure if it's frowned upon. I kept the aesop in there for now as I couldn't construct very short proofs otherwise. The sort_range function proof was suggested in https://leanprover.zulipchat.com/#narrow/stream/113489-new-members/topic/Computing.20Finset.20sort.20of.20Finset.20range/near/410346731 by Ruben Van de Velde. Thanks for your time for improving this PR. please-adopt t-data new-contributor merge-conflict awaiting-author 71/0 Mathlib/Data/Finset/Basic.lean,Mathlib/Data/Finset/Image.lean,Mathlib/Data/Finset/Sort.lean,Mathlib/Data/List/Sort.lean 4 30 ['YaelDillies', 'davikrehalt', 'eric-wieser', 'github-actions', 'jcommelin', 'urkud', 'vihdzp'] nobody
71-44918
2 months ago
851-16406
851 days ago
12-48883
12 days
10332 adri326
author:adri326
 feat(Topology/Sets): define regular open sets and their boolean algebra Introduces a new module, `Mathlib.Topology.Sets.RegularOpens`, which defines the `IsRegularOpen s` predicate (`interior (closure s) = s`) and `TopologicalSpace.RegularOpens`, the type of bundled regular open sets (defined as `Heyting.Regular (Opens X)`). A few properties of regular open sets (bundled and unbundled) and `interior (closure s)` are proven, and a pointwise instance of `MulAction` is provided for regular open sets. --- This PR belongs to my series of PRs around my formalization of Rubin's theorem. There are two possible ways to implement `RegularOpens`: - either construct them by hand and show that they form a boolean algebra (better def-eq but more boilerplate code required) - or use `Heyting.Regular` on the heyting algebra of `Opens` inherited from the `Frame` instance on them I first chose to use the former approach, but using the latter cuts the length of the construction of the boolean algebra of regular open sets by 100 lines of code, and allows us to inherit all of the helper lemmas defined for `Heyting.Regular`. The big downside, though, is that an element of `RegularOpens` isn't defined as a bundled regular open set anymore, but rather as an `Opens` set `s` for which `Opens.interior ↑(Opens.interior ↑sᶜ)ᶜ = s`, so I added an alternative constructor `RegularOpens.of` that instead accepts any set `s` for which `IsRegularOpen s` holds. Another minor downside is that coercion to a set takes two coercions instead of one. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict WIP t-topology 434/0 Mathlib.lean,Mathlib/Data/Set/Pointwise/SMul.lean,Mathlib/Topology/Sets/Opens.lean,Mathlib/Topology/Sets/RegularOpens.lean,docs/references.bib 5 1 ['adri326'] nobody
71-44885
2 months ago
835-28326
835 days ago
0-1135
18 minutes
16801 awainverse
author:awainverse
 feat(ModelTheory/Equivalence): The quotient type of formulas modulo a theory Defines `FirstOrder.Language.Theory.Formula`: `T.Formula α` is the quotient of `L.Formula α` by equivalence modulo a theory `T`. Puts a boolean algebra instance on `T.Formula α`, with `≤` corresponding to implication. --- - [x] depends on: #16799 - [x] depends on: #16800 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict awaiting-author t-logic 174/60 Mathlib/ModelTheory/Complexity.lean,Mathlib/ModelTheory/Equivalence.lean,Mathlib/ModelTheory/Types.lean 3 30 ['YaelDillies', 'awainverse', 'github-actions', 'leanprover-community-bot-assistant', 'mathlib4-dependent-issues-bot', 'metinersin'] nobody
69-19892
2 months ago
567-40523
567 days ago
29-26213
29 days
22314 shetzl
author:shetzl
 feat: add leftmost derivations for context-free grammars Leftmost derivations are often easier to reason about than arbitrary derivations. This PR adds leftmost variants of Rewrites, Produces and Derives to the existing definition of context-free grammars and proves that a string of terminals can be derived iff it can be leftmost derived. Co-authored-by: Tobias Leichtfried --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-computability awaiting-author new-contributor 383/0 Mathlib.lean,Mathlib/Computability/LeftmostDerivation.lean 2 55 ['YaelDillies', 'github-actions', 'madvorak', 'mathlib4-merge-conflict-bot', 'shetzl'] nobody
69-19868
2 months ago
378-43164
378 days ago
72-2714
72 days
37232 mathlib-splicebot
author:mathlib-splicebot
 chore(Algebra/Order): bound on `|n / m|ₘ` and `|n - m|` This PR was automatically created from PR #34722 by @GrigorenkoPV via a [review comment](https://github.com/leanprover-community/mathlib4/pull/34722#discussion_r2996870566) by @Vierkantor. t-algebra delegated
label:t-algebra$
 5/0 Mathlib/Algebra/Order/Group/Unbundled/Abs.lean 1 6 ['Vierkantor', 'bryangingechen', 'github-actions', 'mathlib-bors'] nobody
57-70
1 month ago
57-12503
57 days ago
0-588
9 minutes
36706 kim-em
author:kim-em
 feat(Tactic/FastInstance): warn when a synthesized sub-instance has leaky binder types This PR adds a warning to `fast_instance%` and `inferInstanceAs%` when they encounter a synthesized sub-instance that has leaky data-field binder types. When `fast_instance%` recursively normalizes a class instance, it uses `trySynthInstance` to find canonical sub-instances. If a found sub-instance is not canonical at instances transparency (i.e., its internal lambda binder types reference an unexpanded type alias instead of the target carrier), the tool now emits a warning: ``` fast_instance%: 'leakySub' (for SubClass MyNat) has leaky data-field binder types, which may cause `isDefEq` failures at instances transparency (e.g. in `grind`). Consider redefining it with `fast_instance%` or `inferInstanceAs%`. To suppress: `set_option Elab.fast_instance.warnLeakySubInstances false` ``` The leakiness check uses `withDisabledInstance` to temporarily evict the sub-instance from the discrimination tree (preventing trivial self-match via `trySynthInstance`), then compares against the canonical form at instances transparency. A `warnLeaky` parameter propagates through recursive calls to prevent nested warnings. The warning is suppressed via `set_option Elab.fast_instance.warnLeakySubInstances false`. - [ ] depends on: #36701 🤖 Prepared with Claude Code t-meta blocked-by-other-PR large-import LLM-generated merge-conflict 415/21 Mathlib/Algebra/Module/Congruence/Defs.lean,Mathlib/GroupTheory/Congruence/Defs.lean,Mathlib/Init.lean,Mathlib/RingTheory/Congruence/Defs.lean,Mathlib/RingTheory/Ideal/Quotient/Basic.lean,Mathlib/RingTheory/Ideal/Quotient/Defs.lean,Mathlib/Tactic/DefEqAbuse.lean,Mathlib/Tactic/FastInstance.lean,MathlibTest/CheckInstance.lean,MathlibTest/DefEqAbuse.lean,MathlibTest/InferInstanceAsPercent.lean 11 7 ['Vierkantor', 'eric-wieser', 'github-actions', 'mathlib-dependent-issues', 'mathlib-merge-conflicts'] Vierkantor
assignee:Vierkantor
56-4421
1 month ago
67-68526
67 days ago
0-1003
16 minutes
37432 mariainesdff
author:mariainesdff
 feat(Algebra/BigOperators/NatAntidiagonal): add ofAdd_antidiagonal Co-authored by: @xgenereux. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra awaiting-author
label:t-algebra$
 27/0 Mathlib/Algebra/BigOperators/NatAntidiagonal.lean 1 2 ['dagurtomas', 'github-actions'] dagurtomas
assignee:dagurtomas
31-48524
1 month ago
43-9882
43 days ago
9-25258
9 days
37073 kim-em
author:kim-em
 feat: add wrap_instance% using core's wrapInstance This PR adds a new `wrap_instance%` term elaborator that delegates to Lean core's `wrapInstance` (from https://github.com/leanprover/lean4/pull/12897), and replaces ~53 `fast_instance%` call sites where the replacement is safe. `wrap_instance%` is a thin wrapper (~15 lines) around `Lean.Meta.wrapInstance`. Like `fast_instance%`, it reduces instances to constructor applications and reuses canonical sub-instances. Unlike `fast_instance%`, it works at `instances` transparency and delegates all normalization logic to core. The replaced sites cover: - Equiv/type-alias transfers (WithAbs, WithConv, WithVal, WithLp, TransferInstance) - Surjective constructors (Con, RingCon quotients, module congruences) - DFunLike leaf instances (MultilinearMap, ContinuousMultilinearMap, AlternatingMap, Intertwining) - Quotient instances (LinearAlgebra/Quotient/Defs) - inferInstanceAs% sites (StandardPart, Presentation/Core) - Miscellaneous (InfiniteAdeleRing, ZMod) This PR *doesn't* attempt to replace all `fast_instance%`; it gets more complicated! 🤖 Prepared with Claude Code 88/59 Mathlib/Algebra/Algebra/TransferInstance.lean,Mathlib/Algebra/Module/Congruence/Defs.lean,Mathlib/Algebra/WithConv.lean,Mathlib/Analysis/Normed/Lp/WithLp.lean,Mathlib/Analysis/Normed/Ring/WithAbs.lean,Mathlib/Data/ZMod/Basic.lean,Mathlib/GroupTheory/Congruence/Defs.lean,Mathlib/LinearAlgebra/Alternating/Basic.lean,Mathlib/LinearAlgebra/Multilinear/Basic.lean,Mathlib/LinearAlgebra/Quotient/Defs.lean,Mathlib/RepresentationTheory/Intertwining.lean,Mathlib/RingTheory/Extension/Presentation/Core.lean,Mathlib/Tactic/FastInstance.lean,Mathlib/Topology/Algebra/Module/Alternating/Basic.lean,Mathlib/Topology/Algebra/Module/Multilinear/Basic.lean,Mathlib/Topology/Algebra/Valued/WithVal.lean 16 7 ['JovanGerb', 'github-actions', 'kim-em', 'leanprover-radar', 'mathlib-merge-conflicts'] nobody
23-67940
23 days ago
23-67967
23 days ago
26-54786
26 days
36701 kim-em
author:kim-em
 feat(DefEqAbuse): detect and report leaky instance binder types This PR adds `#check_instance` and `checkInstance` to `Mathlib/Tactic/FastInstance.lean` to diagnose individual instances for leaky data-field binder types, and integrates this into `#defeq_abuse` so it automatically reports leaky instances. A new `withDisabledInstance` helper temporarily evicts an instance from the discrimination tree (via `Attribute.erase` + `withoutModifyingEnv`), allowing `makeFastInstance` to compute the canonical form without `trySynthInstance` trivially finding the instance being checked. `#defeq_abuse` now checks instances used in the failing goal/command for leakiness and reports them alongside the isDefEq failure diagnostics. **Example: `#check_instance`** ```lean def MyNat := ℕ -- Without fast_instance%, the `add` field has binder type ℕ rather than MyNat. instance leakyAdd : Add MyNat := ⟨Nat.add⟩ #check_instance leakyAdd -- ❌ 'leakyAdd': leaky binder types detected. -- The data field `add` has binder type ℕ where MyNat is expected. -- The `fast_instance%` elaborator may be useful as a repair or band-aid: -- `instance : ... := fast_instance% ` instance fixedAdd : Add MyNat := fast_instance% ⟨Nat.add⟩ #check_instance fixedAdd -- ✅ 'fixedAdd': canonical (re-inferred form agrees at instances transparency) ``` 🤖 Prepared with Claude Code LLM-generated awaiting-author t-meta merge-conflict 317/17 Mathlib/Tactic/DefEqAbuse.lean,Mathlib/Tactic/FastInstance.lean,MathlibTest/CheckInstance.lean,MathlibTest/DefEqAbuse.lean 4 43 ['JovanGerb', 'Vierkantor', 'eric-wieser', 'github-actions', 'kim-em', 'mathlib-merge-conflicts', 'ocfnash'] Vierkantor
assignee:Vierkantor
23-1030
23 days ago
60-14789
60 days ago
6-60386
6 days
37364 kim-em
author:kim-em
 feat(Tactic/Linter): add `auxLemma` linter for auto-generated declaration references This PR adds a syntax linter that flags explicit references to auto-generated auxiliary declarations such as `_proof_N`, `match_N`, `_match_N`, and `_sizeOf_N`. These names are internal to the Lean elaborator and are not stable across refactors (e.g. reordering fields in a structure can renumber `_proof_` indices). The linter matches precisely: it requires the suffix after the prefix to be all digits, so `_proof_helper` would not be flagged. It only inspects identifier syntax nodes, so references in comments and docstrings are ignored. Current hits in Mathlib (suppressed with `set_option linter.style.auxLemma false`): - `Mathlib/CategoryTheory/Functor/Category.lean` — `hcomp._proof_2` - `Mathlib/Analysis/Calculus/FormalMultilinearSeries.lean` — `constFormalMultilinearSeries.match_1.eq_2` - `Mathlib/Data/List/Sigma.lean` — `_sizeOf_1` Companion PR to track these suppressions in the tech debt report: https://github.com/leanprover-community/mathlib-ci/pull/17 🤖 Prepared with Claude Code t-linter awaiting-author 87/1 Mathlib.lean,Mathlib/Analysis/Calculus/FormalMultilinearSeries.lean,Mathlib/CategoryTheory/Functor/Category.lean,Mathlib/Data/List/Sigma.lean,Mathlib/Init.lean,Mathlib/Tactic.lean,Mathlib/Tactic/Linter/AuxLemma.lean,MathlibTest/CompileInductive.lean,MathlibTest/interactiveUnfold.lean,MathlibTest/toAdditive.lean 10 35 ['github-actions', 'grunweg', 'kim-em', 'leanprover-radar', 'mathlib-merge-conflicts', 'thorimur'] thorimur
assignee:thorimur
18-34123
18 days ago
18-34152
18 days ago
8-22290
8 days
38597 kim-em
author:kim-em
 chore: backport robustness changes from bump/nightly-2026-04-27 See [#nightly-testing > nightly#213 adaptations for nightly-2026-04-27 @ 💬](https://leanprover.zulipchat.com/#narrow/channel/428973-nightly-testing/topic/nightly.23213.20adaptations.20for.20nightly-2026-04-27/near/591262169). t-category-theory delegated 91/26 Mathlib/AlgebraicTopology/SimplexCategory/Augmented/Monoidal.lean,Mathlib/CategoryTheory/Bicategory/Coherence.lean,Mathlib/CategoryTheory/Limits/Shapes/ConcreteCategory.lean,Mathlib/CategoryTheory/Limits/Shapes/Equalizers.lean,Mathlib/CategoryTheory/Monoidal/Free/Coherence.lean,Mathlib/CategoryTheory/Sites/DenseSubsite/OneHypercoverDense.lean,Mathlib/CategoryTheory/Sites/Hypercover/One.lean 7 10 ['github-actions', 'kim-em', 'mathlib-bors', 'riccardobrasca', 'robin-carlier'] joelriou
assignee:joelriou
12-45120
12 days ago
12-45121
12 days ago
11-49769
11 days
18551 joelriou
author:joelriou
 feat(AlgebraicGeometry): the algebraic De Rham complex If `B` is an `A`-algebra, we construct the algebraic De Rham complex of `B` over `A`: it is a cochain complex of `A`-modules. --- - [ ] depends on: #18735 - [ ] depends on: #18662 - [ ] depends on: #26464 - [ ] depends on: #26465 - [x] depends on: #18534 - [x] depends on: #18440 - [x] depends on: #18432 - [x] depends on: #18408 - [x] depends on: #18389 - [x] depends on: #18374 - [x] depends on: #18359 - [x] depends on: #18332 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) WIP t-algebra blocked-by-other-PR merge-conflict t-algebraic-geometry
label:t-algebra$
 2836/156 Mathlib.lean,Mathlib/Algebra/Category/ModuleCat/ExteriorPower.lean,Mathlib/Algebra/Module/Presentation/Basic.lean,Mathlib/Algebra/Module/Presentation/Cokernel.lean,Mathlib/Algebra/Module/Presentation/Differentials.lean,Mathlib/Algebra/Module/Presentation/DirectSum.lean,Mathlib/Algebra/Module/Presentation/ExteriorPower.lean,Mathlib/Algebra/Module/Presentation/PiTensor.lean,Mathlib/Algebra/Module/Presentation/RestrictScalars.lean,Mathlib/Algebra/Module/Presentation/Tensor.lean,Mathlib/Analysis/NormedSpace/Multilinear/Curry.lean,Mathlib/Analysis/NormedSpace/PiTensorProduct/ProjectiveSeminorm.lean,Mathlib/Data/Finsupp/Defs.lean,Mathlib/Data/Sum/Basic.lean,Mathlib/LinearAlgebra/ExteriorPower/Basic.lean,Mathlib/LinearAlgebra/ExteriorPower/Generators.lean,Mathlib/LinearAlgebra/Multilinear/Basic.lean,Mathlib/LinearAlgebra/Multilinear/TensorProduct.lean,Mathlib/LinearAlgebra/PiTensorProduct/Basic.lean,Mathlib/LinearAlgebra/PiTensorProduct/Finite.lean,Mathlib/LinearAlgebra/PiTensorProduct/Generators.lean,Mathlib/LinearAlgebra/Span.lean,Mathlib/LinearAlgebra/TensorPower.lean,Mathlib/Logic/Function/Basic.lean,Mathlib/RingTheory/DeRham/Basic.lean,Mathlib/RingTheory/PiTensorProduct.lean 26 2 ['github-actions', 'mathlib4-dependent-issues-bot'] nobody
10-16535
10 days ago
unknown
0-0
0 seconds
32305 faenuccio
author:faenuccio
 feat: define Sobolev Spaces Nothing to see yet. --- - [x] depends on: #32250 - [x] depends on: #31809 - [ ] depends on: #39217 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict WIP t-analysis large-import 2487/53 Mathlib.lean,Mathlib/Analysis/Distribution/ContDiffMapSupportedIn.lean,Mathlib/Analysis/Distribution/Distribution.lean,Mathlib/Analysis/Distribution/TestFunction.lean,Mathlib/Analysis/Distribution/WeakDeriv.lean,Mathlib/Analysis/FunctionalSpaces/Sobolev/Basic.lean,Mathlib/MeasureTheory/Function/LocallyIntegrable.lean 7 8 ['ADedecker', 'faenuccio', 'github-actions', 'mathlib-dependent-issues', 'mathlib4-merge-conflict-bot'] nobody
9-80457
9 days ago
172-32372
172 days ago
0-2
2 seconds
39371 fpvandoorn
author:fpvandoorn
 feat: tag lemmas with compactness and closedness --- - [ ] depends on: #39370 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) blocked-by-other-PR 190/11 Mathlib.lean,Mathlib/Tactic.lean,Mathlib/Tactic/Common.lean,Mathlib/Tactic/GrindAttrs.lean,Mathlib/Topology/Basic.lean,Mathlib/Topology/Closure.lean,Mathlib/Topology/Compactness/Compact.lean,Mathlib/Topology/MetricSpace/ProperSpace.lean,Mathlib/Topology/Order/Compact.lean,Mathlib/Topology/Order/OrderClosed.lean,Mathlib/Topology/Separation/Basic.lean,Mathlib/Topology/Separation/Hausdorff.lean,MathlibTest/Compactness.lean 13 2 ['github-actions', 'mathlib-dependent-issues'] nobody
8-8840
8 days ago
8-23111
8 days ago
0-1
1 second
39382 fpvandoorn
author:fpvandoorn
 feat: add some lemmas that closures of some sets are compact * Also tag them with `closedness`/`compactness`. * This can be refactored to use `RelativelyCompact` once we define that notion. * Note: this is only equivalent to `IsBounded` in `ProperSpace`. It is equivalent to `@IsBounded _ (inCompact X) s` in a T2-space, but the latter thing is cumbersome to write. --- - [ ] depends on: #39371 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) blocked-by-other-PR 265/11 Mathlib.lean,Mathlib/Tactic.lean,Mathlib/Tactic/Common.lean,Mathlib/Tactic/GrindAttrs.lean,Mathlib/Topology/Basic.lean,Mathlib/Topology/Closure.lean,Mathlib/Topology/Compactness/Compact.lean,Mathlib/Topology/MetricSpace/Bounded.lean,Mathlib/Topology/MetricSpace/ProperSpace.lean,Mathlib/Topology/Order/Compact.lean,Mathlib/Topology/Order/OrderClosed.lean,Mathlib/Topology/Separation/Basic.lean,Mathlib/Topology/Separation/Hausdorff.lean,MathlibTest/Compactness.lean 14 2 ['github-actions', 'mathlib-dependent-issues'] nobody
8-4751
8 days ago
8-18851
8 days ago
0-359
5 minutes
22925 ggranberry
author:ggranberry
 feat(Mathlib/PlaceHolder/ToeplitzHausdorff): Toeplitz-Hausdorff --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) WIP new-contributor will-close-soon awaiting-author help-wanted t-analysis 411/0 Mathlib/PlaceHolder/ToeplitzHausdorff.lean,Mathlib/PlaceHolder/ToeplitzHausdorff_v2.lean 2 16 ['AntoineChambert-Loir', 'faenuccio', 'ggranberry', 'github-actions', 'vihdzp'] faenuccio
assignee:faenuccio
7-32262
7 days ago
431-23771
431 days ago
3-8649
3 days
39325 mcdoll
author:mcdoll
 feat(FunProp): tag integrableOn Add tags so that `fun_prop` can prove `IntegrableOn` Done at ICERM workshop "Techniques and Tools for the Formalization of Analysis" --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-measure-probability awaiting-author 108/12 Mathlib/MeasureTheory/Function/LocallyIntegrable.lean,Mathlib/MeasureTheory/Integral/IntegrableOn.lean,MathlibTest/FunProp.lean 3 4 ['fpvandoorn', 'github-actions'] nobody
6-79418
6 days ago
7-8084
7 days ago
0-1567
26 minutes
7873 astrainfinita
author:astrainfinita
 perf: reorder `extends` and change instance priority in algebra hierarchy There are no strict rules, but in general `Cancel` is dropped first, then `Comm`, then `Neg / Inv`, then `Assoc`. Not sure if there's a better way. An important goal is to search for `Zero/One/Add/Mul` instances first along `Zero/One/Add/Mul` -> ... -> `Ring` -> `CommRing` -> `Field`. --- - [ ] depends on: #14712 - [x] depends on: #16638 - [ ] depends on: #18464 - [ ] depends on: #18468 - [ ] depends on: #18470 - [ ] depends on: #18472 - [ ] depends on: #18474 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict slow-typeclass-synthesis t-algebra blocked-by-other-PR
label:t-algebra$
 494/204 Archive/Imo/Imo1998Q2.lean,Mathlib/Algebra/Algebra/Hom.lean,Mathlib/Algebra/Associated.lean,Mathlib/Algebra/BigOperators/Ring/List.lean,Mathlib/Algebra/Category/ModuleCat/Presheaf/Limits.lean,Mathlib/Algebra/DirectSum/Algebra.lean,Mathlib/Algebra/DirectSum/Internal.lean,Mathlib/Algebra/EuclideanDomain/Defs.lean,Mathlib/Algebra/EuclideanDomain/Field.lean,Mathlib/Algebra/Field/Basic.lean,Mathlib/Algebra/Field/Defs.lean,Mathlib/Algebra/Field/IsField.lean,Mathlib/Algebra/GCDMonoid/Basic.lean,Mathlib/Algebra/Group/Defs.lean,Mathlib/Algebra/Group/Ext.lean,Mathlib/Algebra/Group/InjSurj.lean,Mathlib/Algebra/Group/Opposite.lean,Mathlib/Algebra/Group/Prod.lean,Mathlib/Algebra/GroupWithZero/Basic.lean,Mathlib/Algebra/GroupWithZero/Defs.lean,Mathlib/Algebra/GroupWithZero/InjSurj.lean,Mathlib/Algebra/GroupWithZero/Prod.lean,Mathlib/Algebra/GroupWithZero/Semiconj.lean,Mathlib/Algebra/GroupWithZero/Units/Basic.lean,Mathlib/Algebra/Homology/Embedding/Basic.lean,Mathlib/Algebra/Homology/HomotopyCategory/DegreewiseSplit.lean,Mathlib/Algebra/Homology/HomotopyCategory/ShiftSequence.lean,Mathlib/Algebra/Lie/Basic.lean,Mathlib/Algebra/MonoidAlgebra/Grading.lean,Mathlib/Algebra/Order/AddGroupWithTop.lean,Mathlib/Algebra/Order/Field/Canonical/Defs.lean,Mathlib/Algebra/Order/Field/Defs.lean,Mathlib/Algebra/Order/Group/Abs.lean,Mathlib/Algebra/Order/Group/Defs.lean,Mathlib/Algebra/Order/GroupWithZero/Canonical.lean,Mathlib/Algebra/Order/Kleene.lean,Mathlib/Algebra/Order/Monoid/Defs.lean,Mathlib/Algebra/Order/Ring/Canonical.lean,Mathlib/Algebra/Order/Ring/Defs.lean,Mathlib/Algebra/Polynomial/Roots.lean,Mathlib/Algebra/Quaternion.lean,Mathlib/Algebra/Ring/BooleanRing.lean,Mathlib/Algebra/Ring/Defs.lean,Mathlib/Algebra/Ring/Ext.lean,Mathlib/Algebra/Ring/InjSurj.lean,Mathlib/Algebra/Ring/Rat.lean,Mathlib/Algebra/Tropical/Basic.lean,Mathlib/Analysis/Fourier/FourierTransformDeriv.lean,Mathlib/Analysis/InnerProductSpace/Orientation.lean,Mathlib/Analysis/InnerProductSpace/Symmetric.lean,Mathlib/Analysis/Normed/Field/Basic.lean,Mathlib/Analysis/Normed/Group/Basic.lean,Mathlib/Analysis/NormedSpace/Star/Multiplier.lean,Mathlib/CategoryTheory/Preadditive/FunctorCategory.lean,Mathlib/CategoryTheory/Preadditive/SingleObj.lean,Mathlib/CategoryTheory/Triangulated/Functor.lean,Mathlib/Data/Finset/NoncommProd.lean,Mathlib/Data/Int/Cast/Defs.lean,Mathlib/Data/Nat/Cast/Defs.lean,Mathlib/Data/Nat/Choose/Multinomial.lean,Mathlib/Data/Num/Lemmas.lean,Mathlib/Data/Rat/Denumerable.lean,Mathlib/Data/Real/ENatENNReal.lean,Mathlib/Dynamics/Ergodic/AddCircle.lean,Mathlib/FieldTheory/KummerExtension.lean,Mathlib/GroupTheory/Congruence/Basic.lean,Mathlib/GroupTheory/MonoidLocalization.lean,Mathlib/GroupTheory/SpecificGroups/Alternating.lean,Mathlib/GroupTheory/Torsion.lean,Mathlib/Init/ZeroOne.lean,Mathlib/LinearAlgebra/LinearPMap.lean,Mathlib/LinearAlgebra/Orientation.lean,Mathlib/LinearAlgebra/QuadraticForm/Basic.lean,Mathlib/LinearAlgebra/TensorPower.lean,Mathlib/LinearAlgebra/TensorProduct/Basic.lean,Mathlib/LinearAlgebra/TensorProduct/Graded/External.lean,Mathlib/MeasureTheory/Decomposition/Jordan.lean,Mathlib/MeasureTheory/Decomposition/SignedLebesgue.lean,Mathlib/NumberTheory/ArithmeticFunction.lean,Mathlib/NumberTheory/LegendreSymbol/GaussEisensteinLemmas.lean,Mathlib/NumberTheory/RamificationInertia.lean,Mathlib/NumberTheory/WellApproximable.lean,Mathlib/NumberTheory/Zsqrtd/QuadraticReciprocity.lean,Mathlib/Order/Filter/Germ.lean,Mathlib/Order/Interval/Finset/Box.lean,Mathlib/RingTheory/Bialgebra/Hom.lean,Mathlib/RingTheory/Coalgebra/Hom.lean,Mathlib/RingTheory/DiscreteValuationRing/Basic.lean,Mathlib/RingTheory/Filtration.lean,Mathlib/RingTheory/Henselian.lean,Mathlib/RingTheory/Ideal/IsPrincipal.lean,Mathlib/RingTheory/Ideal/LocalRing.lean,Mathlib/RingTheory/Ideal/Norm.lean,Mathlib/RingTheory/Localization/Integral.lean,Mathlib/RingTheory/MvPolynomial/Symmetric.lean,Mathlib/RingTheory/TensorProduct/Basic.lean,Mathlib/RingTheory/TensorProduct/MvPolynomial.lean,Mathlib/RingTheory/UniqueFactorizationDomain.lean,Mathlib/RingTheory/Valuation/ValuationSubring.lean,Mathlib/Tactic/Positivity/Core.lean 104 84 ['MichaelStollBayreuth', 'astrainfinita', 'github-actions', 'kim-em', 'leanprover-bot', 'mattrobball'] nobody
6-2563
6 days ago
678-16174
678 days ago
3-36575
3 days
39475 ADedecker
author:ADedecker
 feat: define LinearMap.QuasiInverse If the name "QuasiInverse" is considered too vague, I am open to suggestions. This was written by @PatrickMassot and @CoolRmal at the May 2026 ICERM workshop as part of the project on Fredholm operators. --- - [ ] depends on: #39468 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra blocked-by-other-PR
label:t-algebra$
 347/8 Mathlib.lean,Mathlib/Algebra/Module/Submodule/Ker.lean,Mathlib/Algebra/Module/Submodule/Map.lean,Mathlib/Algebra/Module/Submodule/Range.lean,Mathlib/LinearAlgebra/FiniteRankLinearMap.lean 5 2 ['github-actions', 'mathlib-dependent-issues'] nobody
4-44410
4 days ago
6-7111
6 days ago
0-1118
18 minutes
39370 fpvandoorn
author:fpvandoorn
 feat: add specialized grind sets This adds two grind attributes for specialized tactics. See module doc for more information and motivation. This PR does not tag any lemmas yet. [Zulip thread](https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/small.20specialized.20grind.20sets/with/595132109) --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-meta 113/0 Mathlib.lean,Mathlib/Tactic.lean,Mathlib/Tactic/Common.lean,Mathlib/Tactic/GrindAttrs.lean 4 5 ['chenson2018', 'fpvandoorn', 'github-actions'] dwrensha
assignee:dwrensha
4-24480
4 days ago
8-23156
8 days ago
8-22867
8 days
31587 JovanGerb
author:JovanGerb
 Lean pr testing 11156 Testing the performance improvement given by not deleting cache so often when modifying the environment. cf. https://github.com/leanprover/lean4/pull/11156 --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict WIP 5932/1306 .github/workflows/build_template.yml,Archive/Examples/IfNormalization/Result.lean,Archive/Imo/Imo1988Q6.lean,Archive/Imo/Imo2024Q6.lean,Cache/IO.lean,Counterexamples/Phillips.lean,Mathlib.lean,Mathlib/Algebra/Algebra/NonUnitalHom.lean,Mathlib/Algebra/Algebra/Unitization.lean,Mathlib/Algebra/BigOperators/Group/Finset/Basic.lean,Mathlib/Algebra/BigOperators/Group/List/Basic.lean,Mathlib/Algebra/Category/AlgCat/Basic.lean,Mathlib/Algebra/Category/AlgCat/Limits.lean,Mathlib/Algebra/Category/CoalgCat/ComonEquivalence.lean,Mathlib/Algebra/Category/ContinuousCohomology/Basic.lean,Mathlib/Algebra/Category/Grp/AB.lean,Mathlib/Algebra/Category/Grp/Adjunctions.lean,Mathlib/Algebra/Category/Grp/Biproducts.lean,Mathlib/Algebra/Category/Grp/Colimits.lean,Mathlib/Algebra/Category/Grp/LargeColimits.lean,Mathlib/Algebra/Category/Grp/LeftExactFunctor.lean,Mathlib/Algebra/Category/Grp/Yoneda.lean,Mathlib/Algebra/Category/ModuleCat/Adjunctions.lean,Mathlib/Algebra/Category/ModuleCat/Biproducts.lean,Mathlib/Algebra/Category/ModuleCat/ChangeOfRings.lean,Mathlib/Algebra/Category/ModuleCat/Colimits.lean,Mathlib/Algebra/Category/ModuleCat/Differentials/Presheaf.lean,Mathlib/Algebra/Category/ModuleCat/ExteriorPower.lean,Mathlib/Algebra/Category/ModuleCat/FilteredColimits.lean,Mathlib/Algebra/Category/ModuleCat/Kernels.lean,Mathlib/Algebra/Category/ModuleCat/LeftResolution.lean,Mathlib/Algebra/Category/ModuleCat/Limits.lean,Mathlib/Algebra/Category/ModuleCat/Monoidal/Adjunction.lean,Mathlib/Algebra/Category/ModuleCat/Presheaf.lean,Mathlib/Algebra/Category/ModuleCat/Presheaf/ColimitFunctor.lean,Mathlib/Algebra/Category/ModuleCat/Presheaf/Colimits.lean,Mathlib/Algebra/Category/ModuleCat/Presheaf/Free.lean,Mathlib/Algebra/Category/ModuleCat/Presheaf/Generator.lean,Mathlib/Algebra/Category/ModuleCat/Presheaf/Limits.lean,Mathlib/Algebra/Category/ModuleCat/Presheaf/Monoidal.lean,Mathlib/Algebra/Category/ModuleCat/Presheaf/Pushforward.lean,Mathlib/Algebra/Category/ModuleCat/Presheaf/Sheafification.lean,Mathlib/Algebra/Category/ModuleCat/Presheaf/Sheafify.lean,Mathlib/Algebra/Category/ModuleCat/Sheaf/PullbackContinuous.lean,Mathlib/Algebra/Category/ModuleCat/Sheaf/PullbackFree.lean,Mathlib/Algebra/Category/ModuleCat/Sheaf/PushforwardContinuous.lean,Mathlib/Algebra/Category/ModuleCat/Sheaf/Quasicoherent.lean,Mathlib/Algebra/Category/ModuleCat/Stalk.lean,Mathlib/Algebra/Category/ModuleCat/Topology/Basic.lean,Mathlib/Algebra/Category/ModuleCat/Topology/Homology.lean,Mathlib/Algebra/Category/ModuleCat/Ulift.lean,Mathlib/Algebra/Category/MonCat/Adjunctions.lean,Mathlib/Algebra/Category/MonCat/Colimits.lean,Mathlib/Algebra/Category/MonCat/FilteredColimits.lean,Mathlib/Algebra/Category/MonCat/Limits.lean,Mathlib/Algebra/Category/MonCat/Yoneda.lean,Mathlib/Algebra/Category/Ring/Adjunctions.lean,Mathlib/Algebra/Category/Ring/Colimits.lean,Mathlib/Algebra/Category/Ring/Constructions.lean,Mathlib/Algebra/Category/Ring/FinitePresentation.lean,Mathlib/Algebra/Category/Ring/Limits.lean,Mathlib/Algebra/Category/Ring/Under/Basic.lean,Mathlib/Algebra/Category/Ring/Under/Limits.lean,Mathlib/Algebra/CharP/Two.lean,Mathlib/Algebra/Colimit/DirectLimit.lean,Mathlib/Algebra/DirectSum/Algebra.lean,Mathlib/Algebra/DirectSum/Ring.lean,Mathlib/Algebra/DualNumber.lean,Mathlib/Algebra/Group/Defs.lean,Mathlib/Algebra/Group/Equiv/Basic.lean,Mathlib/Algebra/Group/Ext.lean,Mathlib/Algebra/Group/Nat/Even.lean,Mathlib/Algebra/Group/Submonoid/BigOperators.lean,Mathlib/Algebra/GroupWithZero/Action/Faithful.lean,Mathlib/Algebra/Homology/Additive.lean,Mathlib/Algebra/Homology/AlternatingConst.lean,Mathlib/Algebra/Homology/Augment.lean,Mathlib/Algebra/Homology/Bifunctor.lean,Mathlib/Algebra/Homology/BifunctorAssociator.lean,Mathlib/Algebra/Homology/BifunctorHomotopy.lean,Mathlib/Algebra/Homology/BifunctorShift.lean,Mathlib/Algebra/Homology/CochainComplexOpposite.lean,Mathlib/Algebra/Homology/CochainComplexPlus.lean,Mathlib/Algebra/Homology/CommSq.lean,Mathlib/Algebra/Homology/ComplexShape.lean,Mathlib/Algebra/Homology/ComplexShapeSigns.lean,Mathlib/Algebra/Homology/DerivedCategory/Basic.lean,Mathlib/Algebra/Homology/DerivedCategory/ExactFunctor.lean,Mathlib/Algebra/Homology/DerivedCategory/Ext/Basic.lean,Mathlib/Algebra/Homology/DerivedCategory/Ext/EnoughInjectives.lean,Mathlib/Algebra/Homology/DerivedCategory/Ext/EnoughProjectives.lean,Mathlib/Algebra/Homology/DerivedCategory/Ext/ExactSequences.lean,Mathlib/Algebra/Homology/DerivedCategory/Ext/ExtClass.lean,Mathlib/Algebra/Homology/DerivedCategory/Ext/Map.lean,Mathlib/Algebra/Homology/DerivedCategory/HomologySequence.lean,Mathlib/Algebra/Homology/DerivedCategory/KInjective.lean,Mathlib/Algebra/Homology/DerivedCategory/KProjective.lean,Mathlib/Algebra/Homology/DerivedCategory/ShortExact.lean,Mathlib/Algebra/Homology/DerivedCategory/SingleTriangle.lean,Mathlib/Algebra/Homology/DerivedCategory/TStructure.lean 1425 5 ['JovanGerb', 'github-actions', 'leanprover-bot', 'mathlib4-merge-conflict-bot'] nobody
3-75911
3 days ago
190-23499
190 days ago
0-13411
3 hours
39383 fpvandoorn
author:fpvandoorn
 fix: use notation3 more * `notation3` is better at generating delaborators in the presence of implicit arguments, other notation and some other complications. * I explicitly tested that each change was not correctly pretty-printed before, but now is. * Add spaces around the global notation `^+` (that maybe shouldn't be global at all?) --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) delegated 21/21 Mathlib/Algebra/Ring/Action/Submonoid.lean,Mathlib/Analysis/RCLike/Inner.lean,Mathlib/Data/Sum/Order.lean,Mathlib/LinearAlgebra/AffineSpace/AffineSubspace/Defs.lean,Mathlib/MeasureTheory/Function/SimpleFuncDenseLp.lean,Mathlib/MeasureTheory/Integral/Marginal.lean,Mathlib/MeasureTheory/OuterMeasure/AE.lean,Mathlib/Order/InitialSeg.lean,Mathlib/Topology/Algebra/Module/Multilinear/Basic.lean,Mathlib/Topology/Algebra/Module/Spaces/UniformConvergenceCLM.lean 10 4 ['github-actions', 'j-loreaux', 'mathlib-bors'] nobody
3-8816
3 days ago
3-8816
3 days ago
5-8227
5 days
39155 mathlib-nolints
author:mathlib-nolints
 chore: lake shake --add-public --keep-implied --keep-prefix --fix I am happy to shake some imports for you! **381 files changed** · +406 imports added · -346 imports removed --- [workflow run for this PR](https://github.com/leanprover-community/mathlib4/actions/runs/26001831423) [explain.txt](https://github.com/leanprover-community/mathlib4/actions/runs/26001831423/artifacts/7045805363) large-import merge-conflict 406/346 Mathlib/Algebra/Algebra/Unitization.lean,Mathlib/Algebra/BigOperators/Finprod.lean,Mathlib/Algebra/BigOperators/Group/List/Basic.lean,Mathlib/Algebra/BigOperators/Intervals.lean,Mathlib/Algebra/Category/MonCat/Colimits.lean,Mathlib/Algebra/Category/MonCat/FilteredColimits.lean,Mathlib/Algebra/Category/Ring/Topology.lean,Mathlib/Algebra/Free.lean,Mathlib/Algebra/Group/Conj.lean,Mathlib/Algebra/Group/Subgroup/Basic.lean,Mathlib/Algebra/Group/Subgroup/Ker.lean,Mathlib/Algebra/Group/Submonoid/Saturation.lean,Mathlib/Algebra/Group/Submonoid/Support.lean,Mathlib/Algebra/Group/Units/Basic.lean,Mathlib/Algebra/Homology/DerivedCategory/Ext/Map.lean,Mathlib/Algebra/Homology/DerivedCategory/Ext/MapBijective.lean,Mathlib/Algebra/Homology/HomologicalComplexAbelian.lean,Mathlib/Algebra/Homology/ModelCategory/Injective.lean,Mathlib/Algebra/Homology/ModelCategory/Lifting.lean,Mathlib/Algebra/Lie/CartanCriterion.lean,Mathlib/Algebra/LinearRecurrence.lean,Mathlib/Algebra/Module/Injective.lean,Mathlib/Algebra/Module/SpanRank.lean,Mathlib/Algebra/Module/Submodule/Invariant.lean,Mathlib/Algebra/Module/Submodule/Pointwise.lean,Mathlib/Algebra/MonoidAlgebra/Defs.lean,Mathlib/Algebra/MvPolynomial/Cardinal.lean,Mathlib/Algebra/MvPolynomial/Division.lean,Mathlib/Algebra/MvPolynomial/Equiv.lean,Mathlib/Algebra/MvPolynomial/Funext.lean,Mathlib/Algebra/MvPolynomial/Nilpotent.lean,Mathlib/Algebra/NonAssoc/PreLie/Basic.lean,Mathlib/Algebra/Order/Archimedean/Class.lean,Mathlib/Algebra/Order/Archimedean/Submonoid.lean,Mathlib/Algebra/Order/BigOperators/GroupWithZero/Finset.lean,Mathlib/Algebra/Order/CauSeq/BigOperators.lean,Mathlib/Algebra/Order/Field/Pointwise.lean,Mathlib/Algebra/Order/Group/Indicator.lean,Mathlib/Algebra/Order/Monoid/Canonical/Defs.lean,Mathlib/Algebra/Order/Ring/Archimedean.lean,Mathlib/Algebra/Order/Ring/Cast.lean,Mathlib/Algebra/Order/SuccPred.lean,Mathlib/Algebra/Polynomial/Eval/Coeff.lean,Mathlib/Algebra/Regular/Defs.lean,Mathlib/Algebra/Tropical/Basic.lean,Mathlib/AlgebraicGeometry/Modules/Tilde.lean,Mathlib/AlgebraicGeometry/Morphisms/Finite.lean,Mathlib/AlgebraicGeometry/Morphisms/FlatRank.lean,Mathlib/AlgebraicGeometry/Morphisms/SchemeTheoreticallyDominant.lean,Mathlib/AlgebraicGeometry/Morphisms/UniversallyClosed.lean,Mathlib/AlgebraicGeometry/Morphisms/WeaklyEtale.lean,Mathlib/AlgebraicGeometry/Noetherian.lean,Mathlib/AlgebraicTopology/SimplicialCategory/Basic.lean,Mathlib/AlgebraicTopology/SimplicialComplex/Basic.lean,Mathlib/AlgebraicTopology/SimplicialSet/Boundary.lean,Mathlib/AlgebraicTopology/SimplicialSet/Monoidal.lean,Mathlib/AlgebraicTopology/SimplicialSet/NonDegenerateSimplices.lean,Mathlib/AlgebraicTopology/SimplicialSet/NonDegenerateSimplicesSubcomplex.lean,Mathlib/Analysis/Asymptotics/Lemmas.lean,Mathlib/Analysis/Asymptotics/TVS.lean,Mathlib/Analysis/CStarAlgebra/Projection.lean,Mathlib/Analysis/Calculus/DerivativeTest.lean,Mathlib/Analysis/Calculus/FDeriv/Affine.lean,Mathlib/Analysis/Calculus/Implicit.lean,Mathlib/Analysis/Calculus/LogDeriv.lean,Mathlib/Analysis/Complex/CanonicalDecomposition.lean,Mathlib/Analysis/Complex/Harmonic/Liouville.lean,Mathlib/Analysis/Complex/Harmonic/Poisson.lean,Mathlib/Analysis/Complex/JensenFormula.lean,Mathlib/Analysis/Complex/Schwarz.lean,Mathlib/Analysis/Complex/UpperHalfPlane/Manifold.lean,Mathlib/Analysis/ConstantSpeed.lean,Mathlib/Analysis/Convex/Approximation.lean,Mathlib/Analysis/Convex/FunctionTopology.lean,Mathlib/Analysis/Convex/Segment.lean,Mathlib/Analysis/Distribution/SchwartzSpace/Basic.lean,Mathlib/Analysis/InnerProductSpace/Positive.lean,Mathlib/Analysis/LocallyConvex/Polar.lean,Mathlib/Analysis/Normed/Module/Bases.lean,Mathlib/Analysis/Normed/Module/Complemented.lean,Mathlib/Analysis/Normed/Module/DoubleDual.lean,Mathlib/Analysis/Normed/Module/Dual.lean,Mathlib/Analysis/ODE/DiscreteGronwall.lean,Mathlib/Analysis/RCLike/ContinuousMap.lean,Mathlib/Analysis/SpecialFunctions/ContinuousFunctionalCalculus/Rpow/RingInverseOrder.lean,Mathlib/Analysis/SpecialFunctions/Stirling.lean,Mathlib/Analysis/SpecialFunctions/Trigonometric/Chebyshev/ChebyshevGauss.lean,Mathlib/CategoryTheory/Abelian/Preradical/Colon.lean,Mathlib/CategoryTheory/Adhesive/Subobject.lean,Mathlib/CategoryTheory/CopyDiscardCategory/Widesubcategory.lean,Mathlib/CategoryTheory/Functor/ReflectsIso/Jointly.lean,Mathlib/CategoryTheory/Limits/Constructions/WidePullbackOfTerminal.lean,Mathlib/CategoryTheory/Limits/FunctorCategory/Shapes/Terminal.lean,Mathlib/CategoryTheory/Limits/Preserves/SigmaConst.lean,Mathlib/CategoryTheory/Limits/Preserves/Yoneda.lean,Mathlib/CategoryTheory/Limits/Yoneda.lean,Mathlib/CategoryTheory/Monoidal/Cartesian/Normal.lean,Mathlib/CategoryTheory/Monoidal/Internal/Limits.lean,Mathlib/CategoryTheory/Monoidal/Mon.lean,Mathlib/CategoryTheory/Monoidal/Widesubcategory.lean 381 27 ['JovanGerb', 'MichaelStollBayreuth', 'bryangingechen', 'github-actions', 'leanprover-radar', 'mathlib-merge-conflicts'] nobody
1-78253
1 day ago
1-78254
1 day ago
5-71867
5 days
36709 kim-em
author:kim-em
 feat(DefEqAbuse): suggest minimal @[implicit_reducible] workaround This PR extends `#defeq_abuse` to suggest a minimal set of `@[implicit_reducible]` annotations that would make the failing tactic or command succeed with `backward.isDefEq.respectTransparency true`. When `#defeq_abuse` detects a failure, it now runs a greedy minimisation over semireducible definitions reachable from the goal/command, finding a (possibly non-unique) minimal subset that, when temporarily marked `@[implicit_reducible]`, fixes the issue. The result is reported as an `info` message: ``` info: Workaround: the following @[implicit_reducible] annotations (a possibly non-unique minimal set) would paper over this problem, but the real issue is likely a leaky instance somewhere. set_option allowUnsafeReducibility true attribute [implicit_reducible] MyPred ``` This is a workaround, not a fix — the real cause is usually a leaky instance (which `#check_instance` from https://github.com/leanprover-community/mathlib4/pull/36706 can diagnose). But it can be useful for quick debugging. New helpers: `collectCandidates`, `markImplicitReducible`, `withTempImplicitReducible`, `withTempImplicitReducibleCmd`, `suggestAnnotationsTac`, `suggestAnnotationsCmd`, `formatAnnotations`, `logAnnotationSuggestions`. 🤖 Prepared with Claude Code t-meta LLM-generated 187/17 Mathlib/Tactic/DefEqAbuse.lean,MathlibTest/DefEqAbuse.lean 2 6 ['github-actions', 'kim-em', 'mathlib-merge-conflicts', 'thorimur'] JovanGerb
assignee:JovanGerb
1-74206
1 day ago
24-40226
24 days ago
41-38148
41 days
16074 Rida-Hamadani
author:Rida-Hamadani
 feat: combinatorial maps and planar graphs We define combinatorial maps, then we define planar graph using combinatorial maps. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-combinatorics 243/0 Mathlib.lean,Mathlib/Combinatorics/SimpleGraph/Planar.lean,Mathlib/Data/CombinatorialMap.lean 3 31 ['JMR-Independent', 'MrBrain295', 'Parcly-Taxel', 'Rida-Hamadani', 'github-actions', 'lambda-fairy', 'leanprover-community-bot-assistant'] kmill
assignee:kmill
0-55923
15 hours ago
321-65201
321 days ago
72-50365
72 days
39468 ADedecker
author:ADedecker
 feat: LinearMap.HasFiniteRank and the associated relation This was written by @PatrickMassot at the May 2026 ICERM workshop as part of the project on Fredholm operators. This also adds three supporting lemmas: `map_smul_le_map`, `range_smul_le_range` and `ker_le_ker_smul`. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra awaiting-author
label:t-algebra$
 219/8 Mathlib.lean,Mathlib/Algebra/Module/Submodule/Ker.lean,Mathlib/Algebra/Module/Submodule/Map.lean,Mathlib/Algebra/Module/Submodule/Range.lean,Mathlib/LinearAlgebra/FiniteRankLinearMap.lean,Mathlib/RingTheory/Noetherian/Basic.lean 6 6 ['ADedecker', 'github-actions', 'ocfnash'] nobody
0-16123
4 hours ago
3-24573
3 days ago
2-75064
2 days

PRs with non-conforming titles

Number Author Title Description Labels +/- Modified files (first 100) 📝 💬 All users who commented or reviewed Assignee(s) Updated Last status change total time in review
36503 Mrigna01
author:Mrigna01
 Add false theorem test file --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor 135/0 Mathlib/FalseBench/FalseTheorems.lean 1 3 ['github-actions'] nobody
71-80627
2 months ago
71-80717
71 days ago
71-80428
71 days
37281 AltSoKoly
author:AltSoKoly
 Update EdgeConnectivity.lean --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-combinatorics new-contributor awaiting-author 123/0 Mathlib/Combinatorics/SimpleGraph/Connectivity/EdgeConnectivity.lean,Mathlib/Data/Int/GCD.lean 2 5 ['github-actions', 'grunweg', 'themathqueen'] nobody
44-26504
1 month ago
56-17267
56 days ago
0-432
7 minutes
37556 edwin1729
author:edwin1729
 feat(Topology/Order): Locale.localePointOfSpacePoint if we have a Scott Topology from an Algebraic DCPO (3/4) in a series of PRs proving that "Scott Topologies over Algebraic DCPOs are Sober" We prove here that the unit of the adjunction from `TopCat` to `Locale` defined in `Topology/Order/Category/FrameAdjunction.lean` is a surjective mapping, under the following condition: The underlying TopologicalSpace must be a Scott Topology generated with an underlying Algebraic DCPO structure. - [ ] depends on: #37445 --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-topology new-contributor blocked-by-other-PR merge-conflict 393/1 Mathlib.lean,Mathlib/Topology/Order/ScottTopology.lean,Mathlib/Topology/Order/ScottTopologyDCPO.lean,docs/references.bib 4 5 ['github-actions', 'mathlib-dependent-issues', 'mathlib-merge-conflicts'] nobody
24-80886
24 days ago
50-18986
50 days ago
0-1300
21 minutes
39229 grunweg
author:grunweg
 dev: towards `fun_prop` on manifolds --- - [ ] depends on: #39226 Rebased version of #31580. Meant to be a prototype that demonstrate how this could possibly work. Not functional yet; waiting on cache to continue. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-meta merge-conflict 305/1 Mathlib/Geometry/Manifold/Notation.lean,Mathlib/Tactic/FunProp/Core.lean,MathlibTest/DifferentialGeometry/FunPropM.lean,MathlibTest/fun_prop_dev.lean 4 4 ['github-actions', 'mathlib-dependent-issues', 'mathlib-merge-conflicts'] nobody
6-59207
6 days ago
10-72779
10 days ago
0-12
12 seconds
37010 pion2024
author:pion2024
 `Sl2`update: add theorem `finrank_weightSpace_eq_one_of_isIrreducible` # Background: I am a 2nd year undergrad student in mathematics currently self-teaching Lie algebra and representation theory. Before starting the formalization, I searched for related keywords on Zulip and in the GitHub issues and commits. As far as I could tell, there were no existing results or ongoing attempts before I started. All feedback is welcome. Even a quick check on the statement design/an idea on the generalization (cf Limitations below) would be incredibly helpful. # Overview In this PR, I added the new section `IsAlgClosedIrreducible` which formalizes the well-known theorem `finrank_weightSpace_eq_one_of_isIrreducible` for the Lie algebra $\mathfrak{sl}_2$ step by step. It proves that for a finite-dimensional irreducible representation of $\mathfrak{sl}_2$ over an algebraically closed field $K$ of characteristic zero, every non-trivial weight space has a dimension of exactly 1. # Formalization Structure : Instead of relying on explicit finite sums (`Finset.sum`) and manipulating coefficients, I heavily leverage Mathlib's abstractions in Submodule Lattice Theory and Coordinate-free Linear Algebra. The formalization proceeds in the following logic: 1. Existence of a Primitive Vector (`exists_primitiveVector`): I construct a primitive (highest-weight) vector by showing that repeated applications of the raising operator $e$ must eventually yield zero due to the finite-dimensionality of $M$ and the linear independence of eigenvectors corresponding to distinct eigenvalues. 2. The span of $f$-Tower as a Lie Submodule equals to the whole space (`fTowerLieSubmodule_eq_top`): I define the $f$-tower submodule as the $K$-span of $\{f^k m \mid k \in \mathbb{N}\}$. By proving its closure under the action of $f, h$, and $e$, I establish it as a Lie submodule. Since $M$ is irreducible, this submodule must be the entire space ($\top$). 3. Submodule Lattice Operations (`exists_mem_fTower_of_weightSpace_ne_bot`): To prove that every weight in $M$ is of the form $\mu_0 - 2k$, I use lattice operations (iSup, inf, and Disjoint) to avoid element-wise tracking. Since the $f$-tower spans $M$, the supremum of its weight spaces is $\top$. By leveraging `Module.End.eigenspaces_iSupIndep`, I show that any arbitrary non-trivial weight space would have a trivial intersection with $\top$ if its weight didn't belong to the sequence, yielding a contradiction. 4. Dimension Calculation via Basis Equivalence (`finrank_weightSpace_eq_one_of_isIrreducible`): Finally, I construct a basis from the non-zero elements of the $f$-tower. To show the weight space is 1-dimensional, I use `Basis.equivFun` to compare coefficients algebraically. This avoids heavy manual indexing and index-shifting, proving that any vector in the weight space $\mu_0 - 2k$ is merely a scalar multiple of $f^k m$. # Use of AI: I used Gemini 3.1 Pro for tactics, theorems, improvement suggestions, and error explanations. I fully understand and can vouch for all the modifications I have made to the file. # Limitations: I only managed to formalize the finite-dimensional version, although the theorem also holds in the infinite-dimensional case. In the infinite case the existence of a primitive vector is not guaranteed. A quick search suggests that we might need heavy tools like Casimir operators and the universal enveloping algebra, which are totally beyond my current level. I am looking into it, but since there is a significant mathematical gap, I thought it would be best to get this finite-dimensional version merged first. new-contributor t-algebra large-import awaiting-author merge-conflict
label:t-algebra$
 336/0 Mathlib/Algebra/Lie/Sl2.lean 1 11 ['github-actions', 'mathlib-bors', 'mathlib-merge-conflicts', 'ocfnash', 'pion2024'] ocfnash
assignee:ocfnash
4-41760
4 days ago
51-22397
51 days ago
2-57577
2 days
38937 zw810-ctrl
author:zw810-ctrl
 API and proof of `isStrictMap_prodMap` --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-topology new-contributor large-import awaiting-author merge-conflict 82/3 Mathlib/Topology/Maps/Strict/Basic.lean 1 13 ['ADedecker', 'github-actions', 'mathlib-merge-conflicts', 'zw810-ctrl'] nobody
3-65280
3 days ago
12-68700
12 days ago
0-101
1 minute
39605 Qinghev
author:Qinghev
 Add docstrings for reversed range telescoping lemmas This PR adds docstrings for two existing Finset telescoping lemmas and their additive versions generated by `to_additive`: * `Finset.prod_range_div'` / `Finset.sum_range_sub'` * `Finset.eq_prod_range_div` / `Finset.eq_sum_range_sub` The goal is a small documentation-only contribution that makes the reversed range telescoping API easier to discover from search and hover docs. Local checks: * `git diff --check -- Mathlib/Algebra/BigOperators/Group/Finset/Basic.lean` * Attempted `lake env lean Mathlib/Algebra/BigOperators/Group/Finset/Basic.lean`, but local validation is currently blocked by downloading the `leanprover/lean4:v4.30.0-rc2` toolchain from GitHub timing out/connection-resetting on this machine. Opened as draft until the toolchain/network check can be completed or CI confirms the documentation-only change. t-algebra new-contributor
label:t-algebra$
 8/2 Mathlib/Algebra/BigOperators/Group/Finset/Basic.lean 1 2 ['github-actions'] nobody
2-37342
2 days ago
2-37342
2 days ago
2-37053
2 days
38596 JJYYY-JJY
author:JJYYY-JJY
 Add basic row-equivalence and echelon-form API for matrices This PR adds the first foundational slice of `Mathlib.LinearAlgebra.Matrix.Echelon`, a theorem-oriented API for elementary row operations, row-equivalence, and echelon-form predicates for matrices. The main additions are: * elementary row-scaling matrices and their `GL` versions; * `Matrix.RowEquivalent` for the left action of `GL m R` on rectangular matrices; * row-zero, pivot, echelon, and reduced-echelon predicates; * semantic representative predicates `Matrix.IsEchelonFormOf` and `Matrix.IsReducedEchelonFormOf`. This intentionally stops before row-space characterizations, existence and uniqueness of reduced echelon representatives, and the noncomputable canonical representative `Matrix.rref`; those are planned for later PRs. Co-authored-by: Joseph Qian Co-authored-by: Veer Shukla Co-authored-by: Dhruv Bhatia Co-authored-by: Zheng Wu <1036819072@qq.com> --- This update trims the original full row-reduction API in response to reviewer feedback that the PR was too large. It keeps only the foundation needed by later row-reduction and `rref` PRs. t-algebra new-contributor
label:t-algebra$
 312/6 Mathlib.lean,Mathlib/LinearAlgebra/Matrix/Echelon.lean,Mathlib/LinearAlgebra/Matrix/Transvection.lean 3 10 ['JJYYY-JJY', 'SnirBroshi', 'copilot-pull-request-reviewer', 'dagurtomas', 'github-actions', 'wwylele'] dagurtomas
assignee:dagurtomas
0-74295
20 hours ago
8-80734
8 days ago
16-55868
16 days

PRs without an area label

Number Author Title Description Labels +/- Modified files (first 100) 📝 💬 All users who commented or reviewed Assignee(s) Updated Last status change total time in review
30579 smmercuri
author:smmercuri
 feat : `v.adicCompletionIntegers K` is compact when `K` is a number field --- - [x] depends on: #30576 - [x] depends on: #33484 - [x] depends on: #33594 - [ ] depends on: #34045 - [x] depends on: #36067 - [x] depends on: #36137 - [x] depends on: #36184 - [x] depends on: #36492 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) blocked-by-other-PR large-import 362/11 Mathlib.lean,Mathlib/NumberTheory/NumberField/Completion/FinitePlace.lean,Mathlib/NumberTheory/NumberField/LiesOverInstances.lean,Mathlib/NumberTheory/RamificationInertia/Valuation.lean,Mathlib/RingTheory/DedekindDomain/AdicValuation.lean,Mathlib/RingTheory/Valuation/Discrete/RankOne.lean,Mathlib/RingTheory/Valuation/Extension.lean,Mathlib/Topology/Algebra/Valued/WithVal.lean 9 10 ['github-actions', 'mathlib-merge-conflicts', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
75-82508
2 months ago
219-34016
219 days ago
0-13
13 seconds
35991 xroblot
author:xroblot
 feat(RamificationInertia): decomposition field and inertia field of compositum --- - [ ] depends on: #35808 - [x] depends on: #35493 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) blocked-by-other-PR merge-conflict large-import 645/36 Mathlib/Algebra/Group/Subgroup/Basic.lean,Mathlib/FieldTheory/Galois/Basic.lean,Mathlib/FieldTheory/IntermediateField/Algebraic.lean,Mathlib/NumberTheory/RamificationInertia/Basic.lean,Mathlib/NumberTheory/RamificationInertia/Galois.lean,Mathlib/NumberTheory/RamificationInertia/HilbertTheory.lean 9 6 ['github-actions', 'mathlib-dependent-issues', 'mathlib-merge-conflicts'] nobody
71-85919
2 months ago
81-18920
81 days ago
0-316
5 minutes
34911 smmercuri
author:smmercuri
 feat: idelic product formula --- - [x] depends on: #34915 - [x] depends on: #34918 - [x] depends on: #36184 - [x] depends on: #36204 - [ ] depends on: #36275 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) blocked-by-other-PR merge-conflict 262/2 Mathlib.lean,Mathlib/Algebra/Group/Submonoid/Units.lean,Mathlib/NumberTheory/NumberField/AdeleRing.lean,Mathlib/NumberTheory/NumberField/Completion/FinitePlace.lean,Mathlib/NumberTheory/NumberField/FiniteAdeleRing.lean,Mathlib/RingTheory/DedekindDomain/FiniteAdeleRing.lean,Mathlib/Topology/Algebra/Valued/NormedValued.lean 8 7 ['github-actions', 'mathlib-dependent-issues', 'mathlib-merge-conflicts'] nobody
69-21856
2 months ago
105-38532
105 days ago
0-10
10 seconds
36404 smmercuri
author:smmercuri
 feat: the adele ring of a number field is locally compact --- - [ ] depends on: #30579 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) blocked-by-other-PR large-import merge-conflict 539/113 Mathlib.lean,Mathlib/Algebra/GroupWithZero/Range.lean,Mathlib/NumberTheory/NumberField/AdeleRing.lean,Mathlib/NumberTheory/NumberField/Completion/FinitePlace.lean,Mathlib/NumberTheory/NumberField/LiesOverInstances.lean,Mathlib/NumberTheory/NumberField/ProductFormula.lean,Mathlib/NumberTheory/RamificationInertia/Valuation.lean,Mathlib/RingTheory/DedekindDomain/AdicValuation.lean,Mathlib/RingTheory/Valuation/Extension.lean,Mathlib/Topology/Algebra/Valued/WithVal.lean 10 6 ['github-actions', 'mathlib-dependent-issues', 'mathlib-merge-conflicts'] nobody
62-48313
2 months ago
74-15463
74 days ago
0-264
4 minutes
36733 xroblot
author:xroblot
 feat(RamificationInertia): decomposition field and inertia field of subfields If `D` (resp. `E`) is the decomposition (resp. inertia) field of `P` in `L/K` and `F` is a subextension, then the decomposition (resp. inertia) field of the prime of `F` below `P` in `F/K` is` D ⊓ F` (resp. `E ⊓ F`). --- - [ ] depends on: #36544 - [ ] depends on: #35991 - [x] depends on: #36391. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) blocked-by-other-PR merge-conflict 818/31 Mathlib.lean,Mathlib/Algebra/Group/Subgroup/Basic.lean,Mathlib/FieldTheory/Galois/Basic.lean,Mathlib/FieldTheory/Galois/IsGaloisGroup.lean,Mathlib/FieldTheory/IntermediateField/Algebraic.lean,Mathlib/FieldTheory/Normal/Defs.lean,Mathlib/GroupTheory/QuotientGroup/Basic.lean,Mathlib/GroupTheory/QuotientGroup/Defs.lean,Mathlib/NumberTheory/RamificationInertia/Galois.lean,Mathlib/NumberTheory/RamificationInertia/HilbertTheory.lean,Mathlib/NumberTheory/RamificationInertia/Inertia.lean,Mathlib/NumberTheory/RamificationInertia/Ramification.lean,Mathlib/RingTheory/Ideal/Galois.lean 13 4 ['github-actions', 'mathlib-dependent-issues', 'mathlib-merge-conflicts'] nobody
41-85462
1 month ago
67-27477
67 days ago
0-48
48 seconds
38193 Jun2M
author:Jun2M
 feat(Topology/Algebra/InfiniteSum): Deprecate generalized ENNReal lemmas Following the PR #38489, this PR add deprecated tags to the original `ENNReal` lemmas and change the transitive children files to use the generalized lemmas rather than the deprecated lemmas. Related Zulip thread: [#Is there code for X? > Summing `ENat`s without topology](https://leanprover.zulipchat.com/#narrow/channel/217875-Is-there-code-for-X.3F/topic/Summing.20.60ENat.60s.20without.20topology/with/588756615) --- - [ ] depends on: #38489 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) blocked-by-other-PR merge-conflict 483/329 Mathlib/Algebra/Order/AddGroupWithTop.lean,Mathlib/Analysis/Normed/Group/InfiniteSum.lean,Mathlib/Analysis/PSeries.lean,Mathlib/Analysis/SpecificLimits/Basic.lean,Mathlib/MeasureTheory/Constructions/BorelSpace/Real.lean,Mathlib/MeasureTheory/Covering/Besicovitch.lean,Mathlib/MeasureTheory/Covering/Differentiation.lean,Mathlib/MeasureTheory/Covering/Vitali.lean,Mathlib/MeasureTheory/Function/AEMeasurableOrder.lean,Mathlib/MeasureTheory/Function/ConvergenceInMeasure.lean,Mathlib/MeasureTheory/Function/Egorov.lean,Mathlib/MeasureTheory/Function/Jacobian.lean,Mathlib/MeasureTheory/Function/LpSpace/Complete.lean,Mathlib/MeasureTheory/Function/SimpleFunc.lean,Mathlib/MeasureTheory/Integral/Bochner/VitaliCaratheodory.lean,Mathlib/MeasureTheory/Integral/Lebesgue/Add.lean,Mathlib/MeasureTheory/Integral/Lebesgue/Basic.lean,Mathlib/MeasureTheory/Integral/Lebesgue/Countable.lean,Mathlib/MeasureTheory/Measure/AbsolutelyContinuous.lean,Mathlib/MeasureTheory/Measure/AddContent.lean,Mathlib/MeasureTheory/Measure/Content.lean,Mathlib/MeasureTheory/Measure/Count.lean,Mathlib/MeasureTheory/Measure/Hausdorff.lean,Mathlib/MeasureTheory/Measure/MeasureSpace.lean,Mathlib/MeasureTheory/Measure/MeasuredSets.lean,Mathlib/MeasureTheory/Measure/MutuallySingular.lean,Mathlib/MeasureTheory/Measure/PreVariation.lean,Mathlib/MeasureTheory/Measure/Regular.lean,Mathlib/MeasureTheory/Measure/RegularityCompacts.lean,Mathlib/MeasureTheory/Measure/Restrict.lean,Mathlib/MeasureTheory/Measure/Stieltjes.lean,Mathlib/MeasureTheory/Measure/Tight.lean,Mathlib/MeasureTheory/Measure/Typeclasses/SFinite.lean,Mathlib/MeasureTheory/Measure/WithDensity.lean,Mathlib/MeasureTheory/OuterMeasure/Caratheodory.lean,Mathlib/MeasureTheory/OuterMeasure/Induced.lean,Mathlib/MeasureTheory/OuterMeasure/OfAddContent.lean,Mathlib/MeasureTheory/OuterMeasure/OfFunction.lean,Mathlib/MeasureTheory/OuterMeasure/Operations.lean,Mathlib/MeasureTheory/VectorMeasure/Basic.lean,Mathlib/NumberTheory/Transcendental/Liouville/Measure.lean,Mathlib/Probability/Distributions/Uniform.lean,Mathlib/Probability/Kernel/Defs.lean,Mathlib/Probability/Kernel/WithDensity.lean,Mathlib/Probability/ProbabilityMassFunction/Basic.lean,Mathlib/Probability/ProbabilityMassFunction/Constructions.lean,Mathlib/Probability/ProbabilityMassFunction/Monad.lean,Mathlib/Probability/Process/LocalProperty.lean,Mathlib/Topology/Algebra/InfiniteSum/ENNReal.lean,Mathlib/Topology/Algebra/InfiniteSum/Order.lean,Mathlib/Topology/MetricSpace/PiNat.lean,Mathlib/Topology/Semicontinuity/Basic.lean 52 4 ['SnirBroshi', 'github-actions', 'mathlib-dependent-issues', 'mathlib-merge-conflicts'] nobody
26-11382
26 days ago
27-78426
27 days ago
6-13863
6 days
38567 dagurtomas
author:dagurtomas
 feat(CategoryTheory/Monoidal): autogenerate some lemmas instead of stating them explicitly --- - [ ] depends on: #38482 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) blocked-by-other-PR 928/166 Mathlib.lean,Mathlib/CategoryTheory/Monoidal/Limits/HasLimits.lean,Mathlib/CategoryTheory/Monoidal/Limits/Shapes/Pullback.lean,Mathlib/CategoryTheory/Monoidal/PushoutProduct.lean,Mathlib/Tactic.lean,Mathlib/Tactic/CategoryTheory/Map.lean,Mathlib/Tactic/CategoryTheory/Op.lean,Mathlib/Tactic/CategoryTheory/SpecializeMap.lean,MathlibTest/CategoryTheory/Map.lean,MathlibTest/CategoryTheory/MapSimp.lean,MathlibTest/CategoryTheory/Op.lean,MathlibTest/CategoryTheory/SpecializeMap.lean 12 2 ['github-actions', 'mathlib-dependent-issues'] nobody
25-23468
25 days ago
25-61959
25 days ago
0-512
8 minutes
37910 wwylele
author:wwylele
 feat(Geometry/Euclidean): volume of a simplex This defines the volume of a simplex in Euclidean geometry, and shows that it agrees with measure theory. It also adds the basic set of lemmas (base-and-height formula, reindex, positivity, map, and restrict). Further properties of the volume will be in future PRs. Three new file s are introduced and organized in the following dependency chain: Def.lean -> MeasureSimplex.Lean -> Basic.lean The Def.lean file has the definition only. MeasureSimplex.lean pulls in measure theory. Basic.lean publicly imports Def.lean, and privately imports MeasureSimplex.lean. When a downstream file imports Basic.lean, the measure theory part is not exposed and all properties of the volume is provided. --- - [ ] depends on: #36018 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) blocked-by-other-PR merge-conflict 614/0 Mathlib.lean,Mathlib/Geometry/Euclidean/Volume/Basic.lean,Mathlib/Geometry/Euclidean/Volume/Def.lean,Mathlib/Geometry/Euclidean/Volume/MeasureSimplex.lean,Mathlib/LinearAlgebra/AffineSpace/AffineSubspace/Shift.lean,Mathlib/LinearAlgebra/AffineSpace/Simplex/Basic.lean 6 3 ['github-actions', 'mathlib-dependent-issues', 'mathlib-merge-conflicts'] nobody
25-11564
25 days ago
41-83943
41 days ago
0-473
7 minutes
37073 kim-em
author:kim-em
 feat: add wrap_instance% using core's wrapInstance This PR adds a new `wrap_instance%` term elaborator that delegates to Lean core's `wrapInstance` (from https://github.com/leanprover/lean4/pull/12897), and replaces ~53 `fast_instance%` call sites where the replacement is safe. `wrap_instance%` is a thin wrapper (~15 lines) around `Lean.Meta.wrapInstance`. Like `fast_instance%`, it reduces instances to constructor applications and reuses canonical sub-instances. Unlike `fast_instance%`, it works at `instances` transparency and delegates all normalization logic to core. The replaced sites cover: - Equiv/type-alias transfers (WithAbs, WithConv, WithVal, WithLp, TransferInstance) - Surjective constructors (Con, RingCon quotients, module congruences) - DFunLike leaf instances (MultilinearMap, ContinuousMultilinearMap, AlternatingMap, Intertwining) - Quotient instances (LinearAlgebra/Quotient/Defs) - inferInstanceAs% sites (StandardPart, Presentation/Core) - Miscellaneous (InfiniteAdeleRing, ZMod) This PR *doesn't* attempt to replace all `fast_instance%`; it gets more complicated! 🤖 Prepared with Claude Code 88/59 Mathlib/Algebra/Algebra/TransferInstance.lean,Mathlib/Algebra/Module/Congruence/Defs.lean,Mathlib/Algebra/WithConv.lean,Mathlib/Analysis/Normed/Lp/WithLp.lean,Mathlib/Analysis/Normed/Ring/WithAbs.lean,Mathlib/Data/ZMod/Basic.lean,Mathlib/GroupTheory/Congruence/Defs.lean,Mathlib/LinearAlgebra/Alternating/Basic.lean,Mathlib/LinearAlgebra/Multilinear/Basic.lean,Mathlib/LinearAlgebra/Quotient/Defs.lean,Mathlib/RepresentationTheory/Intertwining.lean,Mathlib/RingTheory/Extension/Presentation/Core.lean,Mathlib/Tactic/FastInstance.lean,Mathlib/Topology/Algebra/Module/Alternating/Basic.lean,Mathlib/Topology/Algebra/Module/Multilinear/Basic.lean,Mathlib/Topology/Algebra/Valued/WithVal.lean 16 7 ['JovanGerb', 'github-actions', 'kim-em', 'leanprover-radar', 'mathlib-merge-conflicts'] nobody
23-67940
23 days ago
23-67967
23 days ago
26-54786
26 days
38316 tannerduve
author:tannerduve
 feat(Order/OmegaCompletePartialOrder): least fixed point and Scott induction Adds `ContinuousHom.lfp` for endomorphisms on an ωCPO with `⊥`, as the `ωSup` of the iterate chain from `⊥`, together with `map_lfp`, `isFixedPt_lfp`, `lfp_le_fixed`, `isLeast_lfp`, and the Scott induction theorem `lfp_induction` (specialized from a more general seed-based `ωSup_iterate_induction`). For `Part.fix`, adds: * `Part.exists_mem_approx_of_mem_fix`: if `y ∈ Part.fix g x`, some finite approximation of `g` already contains `y`. * `Part.Fix.approx_eq_iterate_bot` and `Part.Fix.approxChain_eq_iterateChain`: bridges between `Fix.approx`/`approxChain` and `f^[n] ⊥`/`iterateChain`. * `Part.fix_eq_lfp`: `Part.fix g = ContinuousHom.lfp (.ofFun g hc)` when `g` is ω-Scott continuous. * `Part.fix_scott_induction`: Scott induction specialized to `Part.fix`. * `Part.fix_induction_mem`: membership induction on `Part.fix`, derived from `fix_scott_induction`. new-contributor 114/0 Mathlib/Control/LawfulFix.lean,Mathlib/Order/OmegaCompletePartialOrder.lean,docs/references.bib 3 2 ['github-actions'] nobody
20-13759
20 days ago
31-76261
31 days ago
31-76498
31 days
37023 xroblot
author:xroblot
 feat(NumberTheory/NumberField): linear disjointness from coprime discriminants The key new result is `dvd_discr_iff_dvd_discr_normalClosure`: a prime `p` divides `discr K` if and only if it divides the discriminant of the normal closure of `K` over `ℚ`. Thanks to this result, we generalize `linearDisjoint_of_isGalois_isCoprime_discr` by removing the Galois hypothesis: if K₁ and K₂ are number fields with coprime discriminants, then they are linearly disjoint over ℚ. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) - [ ] depends on: #36843 - [ ] depends on: #30666 merge-conflict blocked-by-other-PR 1575/57 Mathlib.lean,Mathlib/Algebra/Algebra/Hom.lean,Mathlib/Algebra/Group/Subgroup/Basic.lean,Mathlib/Algebra/GroupWithZero/Action/TransferInstance.lean,Mathlib/Algebra/Ring/Int/Field.lean,Mathlib/FieldTheory/Galois/Basic.lean,Mathlib/FieldTheory/Galois/IsGaloisGroup.lean,Mathlib/FieldTheory/IntermediateField/Algebraic.lean,Mathlib/FieldTheory/IntermediateField/ExtendTop.lean,Mathlib/FieldTheory/Normal/Defs.lean,Mathlib/GroupTheory/QuotientGroup/Basic.lean,Mathlib/GroupTheory/QuotientGroup/Defs.lean,Mathlib/NumberTheory/NumberField/Basic.lean,Mathlib/NumberTheory/NumberField/Cyclotomic/Basic.lean,Mathlib/NumberTheory/NumberField/Discriminant/Different.lean,Mathlib/NumberTheory/RamificationInertia/Basic.lean,Mathlib/NumberTheory/RamificationInertia/Galois.lean,Mathlib/NumberTheory/RamificationInertia/HilbertTheory.lean,Mathlib/RingTheory/AlgebraTower.lean,Mathlib/RingTheory/Ideal/Galois.lean,Mathlib/RingTheory/Ideal/Norm/AbsNorm.lean,Mathlib/RingTheory/IntegralClosure/IsIntegralClosure/Basic.lean,Mathlib/RingTheory/Invariant/Basic.lean,Mathlib/RingTheory/Localization/FractionRing.lean 24 1 ['mathlib-dependent-issues'] nobody
15-11354
15 days ago
60-48603
60 days ago
0-83
1 minute
38489 Jun2M
author:Jun2M
 feat(Topology/Algebra/InfiniteSum): Generalize ENNReal lemmas This PR generalizes many theorems in Topology/Algebra/InfiniteSum/ENNReal.lean from `ENNREal` to any type that satisfies a list of order-related instances, mostly `[CommMonoid α] [CompleteLattice α] [CanonicallyOrderedMul α] [TopologicalSpace α] [SupConvergenceClass α]` Deprecation of the original `ENNReal` lemmas are done in the next PR: #38193. Related Zulip thread: [#Is there code for X? > Summing `ENat`s without topology](https://leanprover.zulipchat.com/#narrow/channel/217875-Is-there-code-for-X.3F/topic/Summing.20.60ENat.60s.20without.20topology/with/588756615) --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) 261/3 Mathlib/MeasureTheory/Measure/MeasureSpace.lean,Mathlib/MeasureTheory/OuterMeasure/OfFunction.lean,Mathlib/Topology/Algebra/InfiniteSum/Basic.lean,Mathlib/Topology/Algebra/InfiniteSum/Order.lean 4 7 ['Jun2M', 'SnirBroshi', 'github-actions', 'wwylele'] nobody
12-740
12 days ago
12-817
12 days ago
27-76973
27 days
39163 j-loreaux
author:j-loreaux
 feat: `star` structures on `ContinuousLinearMapWOT` In particular, with these instances it makes sense to consider the `StarSubalgebra.topologicalClosure` of some `S : StarSubalgebra 𝕜 (F →WOT[𝕜] F)`. --- - [ ] depends on: #37914 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) blocked-by-other-PR 157/4 Mathlib.lean,Mathlib/Algebra/Star/Basic.lean,Mathlib/Algebra/Star/Pointwise.lean,Mathlib/Algebra/Star/TransferInstance.lean,Mathlib/Analysis/InnerProductSpace/WeakOperatorTopology.lean 5 2 ['github-actions', 'mathlib-dependent-issues'] nobody
11-65908
11 days ago
11-65908
11 days ago
0-405
6 minutes
39157 vihdzp
author:vihdzp
 feat: `Nat.cast` commutes with addition --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) 26/9 Mathlib/Data/Nat/Cast/Commute.lean,Mathlib/SetTheory/Ordinal/Arithmetic.lean 2 2 ['github-actions', 'plp127'] nobody
11-28422
11 days ago
12-3487
12 days ago
12-3198
12 days
38606 dennj
author:dennj
 feat: preparation for Vanishing Sum of Roots of Unity Adds the Mathlib API extensions needed for an upcoming formalization of the Lam-style classification theorem for vanishing sums of roots of unity. * Mathlib/LinearAlgebra/LinearIndependent/Lemmas.lean + `exists_eq_const_of_sum_smul_eq_zero_of_sum_eq_zero_of_linearIndependent`: if `∑ vᵢ = 0` and the first `n-1` of `n` vectors are linearly independent, every linear relation has constant coefficients. * Mathlib/RingTheory/Radical/NatInt.lean + `Nat.totient_eq_div_radical_mul_totient_radical`: Euler's totient splits as `φ(n) = (n / rad n) * φ(rad n)`. * Mathlib/RingTheory/RootsOfUnity/PrimitiveRoots.lean + `IsPrimitiveRoot.sum_range_pow_mul_div_eq_zero_of_dvd`: the `d` evenly-spaced powers of a primitive `k`-th root sum to zero, for `d ∣ k` and `1 < d`. * Mathlib/NumberTheory/Cyclotomic/LinearDisjoint.lean (new) + `IsPrimitiveRoot.linearDisjoint_adjoin_pow_of_coprime`: cyclotomic subfields of coprime orders are linearly disjoint over `ℚ`. * Mathlib/NumberTheory/Cyclotomic/LinearRelations.lean (new) + `IsPrimitiveRoot.coeffs_eq_of_sum_pow_eq_zero_prime_coprime`: in the cyclotomic field of order `p * m` with `p` prime coprime to `m`, any `ℚ⟮ζ^p⟯`-linear relation among powers of `ζ^m` has all coefficients equal. --- I need these as preparation to start formalizing the theorem: Let k be a positive integer. If a finite family of complex k-th roots of unity sums to zero, then the size of the family is a non-negative integer combination of the prime divisors of k. --- Human-made PR with AI used for golfing and documentation new-contributor 219/0 Mathlib.lean,Mathlib/LinearAlgebra/LinearIndependent/Lemmas.lean,Mathlib/NumberTheory/Cyclotomic/LinearDisjoint.lean,Mathlib/NumberTheory/Cyclotomic/LinearRelations.lean,Mathlib/RingTheory/Radical/Totient.lean,Mathlib/RingTheory/RootsOfUnity/PrimitiveRoots.lean 6 3 ['github-actions', 'mathlib-merge-conflicts'] nobody
9-24154
9 days ago
9-2323
9 days ago
8-31594
8 days
39279 jayscambler
author:jayscambler
 feat(Cryptography/Sigma): Schnorr sigma protocol and signature scheme Adds `Mathlib/Cryptography/Sigma/Schnorr.lean`. New file in a new top-level directory; mathlib currently has no `Mathlib/Cryptography/`, so I've taken `Mathlib/Cryptography/Sigma/` as the natural home for sigma-protocol formalizations. The file proves the three defining properties of Schnorr's identification scheme as a sigma protocol: - `Schnorr.correct`: completeness. Honest verifier accepts honest signer's transcript. - `Schnorr.specialSoundness`: from two accepting transcripts sharing the commitment but using different challenges `c, c'`, the witness `x = (s - s') / (c - c')` is recovered. Needs `q` prime so `c - c'` is invertible in `ZMod q`. - `Schnorr.hvzkAccepts`: the HVZK simulator `g^s · (y^c)⁻¹` always yields accepting transcripts. This is the structural-correctness half of HVZK only; the distributional indistinguishability statement is a separate result and not in this PR. On top of the sigma protocol there's `Schnorr.Signature.{keyGen, sign, verify, correct}` wrapping it as a Fiat-Shamir signature scheme; `Schnorr.Signature.correct` is a one-line corollary of `Schnorr.correct`. Two auxiliary lemmas, `Schnorr.gpow_sub` and `Schnorr.gpow_mul`, bridge `ZMod q` arithmetic and group exponentiation under `Fintype.card G = q`. They're local to this file for now because the surrounding `gpow` API is itself cryptography-specific; if a general `ZMod q`-graded group action framework lands in mathlib later, both lemmas would become instances of it. There's also a small `example` instantiating everything on `Multiplicative (ZMod q)` for `Fact q.Prime` to show the API typechecks. That instantiation is a toy (DLOG is trivial in that group), but it confirms the abstraction is usable. **AI disclosure**: this PR was a collaboration between myself, Grey Haven's autocontext and Claude Opus 4.7 (Anthropic). I read each line and built locally on current master. (strawberry has three r's) new-contributor LLM-generated 352/0 Mathlib.lean,Mathlib/Cryptography/Sigma/Schnorr.lean 2 2 ['github-actions'] nobody
9-21506
9 days ago
9-21585
9 days ago
9-21786
9 days
38472 Raph-DG
author:Raph-DG
 feat(AlgebraicGeometry): The Weil divisor associated to an element of the function field on a locally Noetherian integral scheme In this PR we define and provide some basic API for principal Weil divisors, i.e. the Weil divisor associated to an element of the function field of a locally noetherian, integral scheme. - [ ] depends on: #29774 - [ ] depends on: #37985 - [ ] depends on: #37901 - [ ] depends on: #38002 --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) large-import blocked-by-other-PR 713/0 Mathlib.lean,Mathlib/AlgebraicGeometry/AlgebraicCycle/Basic.lean,Mathlib/AlgebraicGeometry/AlgebraicCycle/Principal.lean,Mathlib/AlgebraicGeometry/FunctionField.lean,Mathlib/AlgebraicGeometry/OrderOfVanishing.lean,Mathlib/Order/Hom/Basic.lean,Mathlib/Order/KrullDimension.lean,Mathlib/Order/Minimal.lean,Mathlib/Topology/Inseparable.lean,Mathlib/Topology/LocallyFinsupp/Pushforward.lean,Mathlib/Topology/Sober.lean 11 3 ['github-actions', 'mathlib-dependent-issues', 'mathlib-merge-conflicts'] nobody
8-46179
8 days ago
28-22929
28 days ago
0-1194
19 minutes
39139 or4nge19
author:or4nge19
 feat(LinearAlgebra): Schur triangulation Adds Schur triangulation API for algebraically closed `RCLike`, proved by triangularizing an endomorphism, aiming at a more mathlib idiomatic approach than the original one in #20730 as it now (better) specializes the existing triangularization API and generalizes supporting lemmas in more natural places. A prerequisite for porting `Matrix.det_exp` proof from physlib. It also proves half of existing TODO in Eigenspace.Triangularizable. It may need a split into 2 PRs and coordination with #37006 . See [this](https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/Contribute.20Schur.20decomposition/with/532385359) and [this](https://leanprover.zulipchat.com/#narrow/channel/113489-new-members/topic/.28Matrix.20and.20NormedSpace.2Eexp.29.20.7C.20det.20.28exp.20A.29.20.3D.20exp.20.28trace.20A.29/with/581264603) zulip discussions. Co-authored-by: [kuotsanhsu](https://github.com/kuotsanhsu) --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) large-import awaiting-author 687/75 Mathlib.lean,Mathlib/Analysis/InnerProductSpace/GramSchmidtOrtho.lean,Mathlib/Analysis/InnerProductSpace/Triangularizable.lean,Mathlib/LinearAlgebra/Basis/Fin.lean,Mathlib/LinearAlgebra/Basis/Flag.lean,Mathlib/LinearAlgebra/Eigenspace/Basic.lean,Mathlib/LinearAlgebra/Eigenspace/Triangularizable.lean,Mathlib/LinearAlgebra/Matrix/Block.lean,Mathlib/LinearAlgebra/Matrix/Charpoly/Basic.lean,Mathlib/LinearAlgebra/Matrix/SchurTriangulation.lean 10 4 ['dagurtomas', 'github-actions', 'or4nge19', 'wwylele'] nobody
8-17012
8 days ago
8-17012
8 days ago
4-23931
4 days
39371 fpvandoorn
author:fpvandoorn
 feat: tag lemmas with compactness and closedness --- - [ ] depends on: #39370 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) blocked-by-other-PR 190/11 Mathlib.lean,Mathlib/Tactic.lean,Mathlib/Tactic/Common.lean,Mathlib/Tactic/GrindAttrs.lean,Mathlib/Topology/Basic.lean,Mathlib/Topology/Closure.lean,Mathlib/Topology/Compactness/Compact.lean,Mathlib/Topology/MetricSpace/ProperSpace.lean,Mathlib/Topology/Order/Compact.lean,Mathlib/Topology/Order/OrderClosed.lean,Mathlib/Topology/Separation/Basic.lean,Mathlib/Topology/Separation/Hausdorff.lean,MathlibTest/Compactness.lean 13 2 ['github-actions', 'mathlib-dependent-issues'] nobody
8-8840
8 days ago
8-23111
8 days ago
0-1
1 second
39382 fpvandoorn
author:fpvandoorn
 feat: add some lemmas that closures of some sets are compact * Also tag them with `closedness`/`compactness`. * This can be refactored to use `RelativelyCompact` once we define that notion. * Note: this is only equivalent to `IsBounded` in `ProperSpace`. It is equivalent to `@IsBounded _ (inCompact X) s` in a T2-space, but the latter thing is cumbersome to write. --- - [ ] depends on: #39371 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) blocked-by-other-PR 265/11 Mathlib.lean,Mathlib/Tactic.lean,Mathlib/Tactic/Common.lean,Mathlib/Tactic/GrindAttrs.lean,Mathlib/Topology/Basic.lean,Mathlib/Topology/Closure.lean,Mathlib/Topology/Compactness/Compact.lean,Mathlib/Topology/MetricSpace/Bounded.lean,Mathlib/Topology/MetricSpace/ProperSpace.lean,Mathlib/Topology/Order/Compact.lean,Mathlib/Topology/Order/OrderClosed.lean,Mathlib/Topology/Separation/Basic.lean,Mathlib/Topology/Separation/Hausdorff.lean,MathlibTest/Compactness.lean 14 2 ['github-actions', 'mathlib-dependent-issues'] nobody
8-4751
8 days ago
8-18851
8 days ago
0-359
5 minutes
39392 jayscambler
author:jayscambler
 feat(Cryptography): one-time pad and Shannon perfect secrecy Adds `Mathlib/Cryptography/OTP.lean`. One-time pad over an arbitrary finite abelian group `G`: - `OTP.encrypt k m := m + k`, `OTP.decrypt k c := c - k`. - `OTP.correct`: `decrypt k (encrypt k m) = m`, by `abel`. - `OTP.perfect_secrecy`: for any `m₀, m₁`, the distributions of `encrypt k m₀` and `encrypt k m₁` over uniform `k` are equal; both reduce to `PMF.uniformOfFintype G`. Proof goes via `Equiv.addLeft`. Independent of the Schnorr PR (#39279); no shared definitions. Unlike everything else likely to live under `Mathlib/Cryptography/`, the security guarantee here is information-theoretic, not computational. **AI disclosure**: this PR was a collaboration between myself, Grey Haven's autocontext and Claude Opus 4.7 (Anthropic). I read each line and built locally on current master. (strawberry has three r's) new-contributor LLM-generated 76/0 Mathlib.lean,Mathlib/Cryptography/OTP.lean 2 3 ['MrBrain295', 'github-actions'] nobody
7-70458
7 days ago
8-6532
8 days ago
8-6243
8 days
38551 TTony2019
author:TTony2019
 feat(Analysis/Convex/Intrinsic): add `affineSpan_prod_eq` and `intrinsicInterior_prod_eq` ### Summary We prove that the affine span of a product set equals the product of the affine spans, and that the intrinsic interior of a product set equals the product of the intrinsic interiors. - `affineSpan_prod_eq`: for `s : Set P₁` and `t : Set P₂`, `affineSpan k (s ×ˢ t) = (affineSpan k s) ×ˢ (affineSpan k t)` as sets. - `intrinsicInterior_prod_eq`: for `s : Set P` and `t : Set Q`, `intrinsicInterior 𝕜 (s ×ˢ t) = intrinsicInterior 𝕜 s ×ˢ intrinsicInterior 𝕜 t`. These two theorems are added to `Mathlib/LinearAlgebra/AffineSpace/AffineSubspace/Basic.lean` and `Mathlib/Analysis/Convex/Intrinsic.lean`. ### Collaboration Co-authored-by: @imathwy new-contributor 144/0 Mathlib/Algebra/AddTorsor/Basic.lean,Mathlib/Algebra/Group/Pointwise/Set/Basic.lean,Mathlib/Analysis/Convex/Intrinsic.lean,Mathlib/LinearAlgebra/AffineSpace/AffineSubspace/Basic.lean,Mathlib/LinearAlgebra/Prod.lean 5 22 ['TTony2019', 'github-actions', 'wwylele'] nobody
6-21381
6 days ago
23-70147
23 days ago
26-13731
26 days
39202 FordUniver
author:FordUniver
 feat(Analysis/Calculus/Gradient): add toDual_gradient and companions Add `toDual_gradient`, `toDual_gradientWithin`, and the composed variants `toDual_comp_gradient`, `toDual_comp_gradientWithin` — the natural inverse direction of the gradient's defining equation `∇ f x := (toDual 𝕜 F).symm (fderiv 𝕜 f x)`. These identify `(toDual 𝕜 F) (∇ f x)` with `fderiv 𝕜 f x` (and the `gradientWithin` and composed forms with the corresponding fderiv versions), making the Riesz isomorphism between the two derivative views explicit. The proofs of `DifferentiableAt.hasGradientAt` and `DifferentiableWithinAt.hasGradientWithinAt` in the same file are simplified to use them. --- Came up while formalizing the descent lemma for Lipschitz-smooth functions, where being able to switch between `LipschitzWith K (fderiv ℝ f)` and `LipschitzWith K (∇ f)` is helpful, which with this PR becomes `toDual_comp_gradient ▸ (toDual ℝ F).isometry.lipschitzWith_iff K`. Also slightly simplifies two call sites in mathlib. maintainer-merge 20/5 Mathlib/Analysis/Calculus/Gradient/Basic.lean 1 5 ['FordUniver', 'Komyyy', 'github-actions'] nobody
4-79573
4 days ago
11-26933
11 days ago
11-26808
11 days
35560 Thmoas-Guan
author:Thmoas-Guan
 feat(RingTheory): Corollaries of Cohen Structure Theorem Corollaries of Cohen structure theorem, saying that complete local ring can be represented as quotient of regular local ring. --- - [ ] depends on: #28683 - [ ] depends on: #35561 - [ ] depends on: #39289 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) blocked-by-other-PR large-import 3197/177 Mathlib.lean,Mathlib/Algebra/Category/Ring/FilteredColimitsLocal.lean,Mathlib/Algebra/Module/SpanRank.lean,Mathlib/AlgebraicGeometry/Properties.lean,Mathlib/FieldTheory/SeparablyGenerated.lean,Mathlib/FieldTheory/TranscendentalSeparable.lean,Mathlib/RingTheory/AdicCompletion/LocalRing.lean,Mathlib/RingTheory/AdicCompletion/Noetherian.lean,Mathlib/RingTheory/CohenStructureTheorem.lean,Mathlib/RingTheory/Filtration.lean,Mathlib/RingTheory/Flat/Extension.lean,Mathlib/RingTheory/Ideal/Height.lean,Mathlib/RingTheory/Ideal/KrullsHeightTheorem.lean,Mathlib/RingTheory/Ideal/Operations.lean,Mathlib/RingTheory/KrullDimension/PID.lean,Mathlib/RingTheory/LocalRing/ResidueField/Ideal.lean,Mathlib/RingTheory/Nilpotent/GeometricallyReduced.lean,Mathlib/RingTheory/RegularLocalRing/Basic.lean,Mathlib/RingTheory/RegularLocalRing/PowerSeries.lean,Mathlib/RingTheory/Smooth/Field.lean 20 10 ['BryceT233', 'github-actions', 'mathlib-bors', 'mathlib-dependent-issues', 'mathlib-merge-conflicts'] nobody
4-33478
4 days ago
91-53764
91 days ago
0-8
8 seconds
35790 Brian-Nugent
author:Brian-Nugent
 feat(CategoryTheory/AlgebraicGeometry): Flasque Sheaves have vanishing cohomology Proves cohomology vanishing for flasque sheaves. --- - [x] depends on: #34742 - [x] depends on: #34267 - [x] depends on: #35785 - [ ] depends on: #36218 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) large-import blocked-by-other-PR 367/2 Mathlib.lean,Mathlib/Algebra/Homology/ShortComplex/Exact.lean,Mathlib/Algebra/Homology/SpectralObject/Page.lean,Mathlib/CategoryTheory/ComposableArrows/Basic.lean,Mathlib/CategoryTheory/Sites/SheafCohomology/ExactSequences.lean,Mathlib/Topology/Sheaves/AddCommGrpCat.lean,Mathlib/Topology/Sheaves/Flasque.lean,Mathlib/Topology/Sheaves/Sheaf.lean 8 10 ['Brian-Nugent', 'github-actions', 'mathlib-dependent-issues', 'mathlib-merge-conflicts', 'smorel394'] dagurtomas
assignee:dagurtomas
2-14566
2 days ago
85-75643
85 days ago
0-23
23 seconds
38036 JovanGerb
author:JovanGerb
 feat: `NSMul`/`NPow` type class This PR is adds `NSMul`, `NPow`, `ZSMul` and `ZPow` classes for the `nsmul`, `npow`, `zsmul`, `zpow` data fields. This has a few advantages: - If you first declare a `SMul` instance, then you don't need to manually write `nsmul := (· • ·)` and `zsmul := (· • ·)` . For `Pow`, the extra benefit is that inferring the instance is preferred over the default field `npowRecAuto`. So this helps avoid accidental diamonds. - If you first declare a `SMul` instance on a type synonym, then `inferInstanceAs` will infer the `nsmul` field from the `SMul` instance. This makes it easier to avoid diamonds on type synonyms like `Matrix` and `MonoidAlgebra`. - The not-yet-merged instance diamond linter will be able to detect cases where the `NSMul` and `SMul` classes do not agree. In the process of making this PR, I have identified two existing `NPow` diamonds: - In `Mathlib.Algebra.Order.Positive.Field`, there were two conflicting `NPow` instances. - For `Fin`, there are two conflicting `NPow` instances. I have overwritten the one in core lean with the one from mathlib that is more computationally efficient. TODO: the same for `QSMul` and `NNQSMul`. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict 276/273 Mathlib/Algebra/Colimit/DirectLimit.lean,Mathlib/Algebra/FreeAlgebra.lean,Mathlib/Algebra/Group/Action/Opposite.lean,Mathlib/Algebra/Group/Defs.lean,Mathlib/Algebra/Group/Ext.lean,Mathlib/Algebra/Group/Int/Defs.lean,Mathlib/Algebra/Group/Opposite.lean,Mathlib/Algebra/Group/Prod.lean,Mathlib/Algebra/Group/Submonoid/Membership.lean,Mathlib/Algebra/Group/TypeTags/Basic.lean,Mathlib/Algebra/Group/Units/Defs.lean,Mathlib/Algebra/GroupWithZero/Action/Opposite.lean,Mathlib/Algebra/Module/NatInt.lean,Mathlib/Algebra/MonoidAlgebra/Defs.lean,Mathlib/Algebra/Order/Monoid/Unbundled/WithTop.lean,Mathlib/Algebra/Order/Positive/Field.lean,Mathlib/Algebra/Order/Ring/Archimedean.lean,Mathlib/Algebra/Order/Ring/WithTop.lean,Mathlib/Algebra/Ring/MinimalAxioms.lean,Mathlib/Algebra/RingQuot.lean,Mathlib/CategoryTheory/Triangulated/Basic.lean,Mathlib/Data/BitVec.lean,Mathlib/Data/Complex/Basic.lean,Mathlib/Data/Rat/Defs.lean,Mathlib/Data/ZMod/Defs.lean,Mathlib/Data/ZMod/IntUnitsPower.lean,Mathlib/FieldTheory/RatFunc/Basic.lean,Mathlib/GroupTheory/GroupAction/Hom.lean,Mathlib/LinearAlgebra/Matrix/Defs.lean,Mathlib/LinearAlgebra/Matrix/ZPow.lean,Mathlib/LinearAlgebra/TensorProduct/Basic.lean,Mathlib/LinearAlgebra/TensorProduct/Defs.lean,Mathlib/NumberTheory/ArithmeticFunction/Defs.lean,Mathlib/RingTheory/PolynomialLaw/Basic.lean,Mathlib/RingTheory/Valuation/ValuativeRel/Basic.lean,Mathlib/SetTheory/Cardinal/Order.lean,Mathlib/Tactic/Abel.lean,Mathlib/Tactic/Translate/ToAdditive.lean,Mathlib/Topology/Algebra/GroupCompletion.lean,Mathlib/Topology/Algebra/Module/LinearMap.lean,MathlibTest/instance_diamonds.lean 41 17 ['JovanGerb', 'eric-wieser', 'github-actions', 'jcommelin', 'leanprover-radar', 'mathlib-merge-conflicts', 'vihdzp'] nobody
1-78261
1 day ago
1-78262
1 day ago
29-38312
29 days
39233 linesthatinterlace
author:linesthatinterlace
 feat: `Pi.map` rename to `Function.map` This PR renames `Pi.map` to `Function.map` and makes the changes necessary to support this. In particular this means that Mathlib.Logic.Function.Defs now only contains the Function namespace. Zulip thread: [#PR reviews > #39233 - rename Pi.map to Function.map @ 💬](https://leanprover.zulipchat.com/#narrow/channel/144837-PR-reviews/topic/.2339233.20-.20rename.20Pi.2Emap.20to.20Function.2Emap/near/594605689) General discussion regarding the Pi namespace: https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/The.20Pi.20namespace/near/594782721 --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) awaiting-zulip merge-conflict 131/122 Mathlib/Algebra/Category/Grp/AB.lean,Mathlib/Algebra/Notation/Pi/Defs.lean,Mathlib/Algebra/Order/Antidiag/Nat.lean,Mathlib/Algebra/Regular/Pi.lean,Mathlib/Analysis/InnerProductSpace/Coalgebra.lean,Mathlib/Analysis/SpecialFunctions/PolarCoord.lean,Mathlib/Condensed/Discrete/LocallyConstant.lean,Mathlib/Control/Bifunctor.lean,Mathlib/Data/Finset/Powerset.lean,Mathlib/Data/Prod/Basic.lean,Mathlib/Data/Set/Prod.lean,Mathlib/Dynamics/Ergodic/MeasurePreserving.lean,Mathlib/Dynamics/PeriodicPts/Defs.lean,Mathlib/Dynamics/PeriodicPts/Lemmas.lean,Mathlib/Dynamics/TopologicalEntropy/Semiconj.lean,Mathlib/FieldTheory/Perfect.lean,Mathlib/Geometry/Manifold/IsManifold/Basic.lean,Mathlib/Geometry/Manifold/IsManifold/ExtChartAt.lean,Mathlib/GroupTheory/MonoidLocalization/Lemmas.lean,Mathlib/LinearAlgebra/Multilinear/Basis.lean,Mathlib/LinearAlgebra/Pi.lean,Mathlib/Logic/Equiv/Basic.lean,Mathlib/Logic/Equiv/PartialEquiv.lean,Mathlib/Logic/Function/Basic.lean,Mathlib/Logic/Function/Defs.lean,Mathlib/Logic/Function/Iterate.lean,Mathlib/Order/Filter/Cofinite.lean,Mathlib/Order/Filter/Pi.lean,Mathlib/RingTheory/Coalgebra/Basic.lean,Mathlib/Topology/Algebra/FilterBasis.lean,Mathlib/Topology/Algebra/Module/LinearMapPiProd.lean,Mathlib/Topology/Algebra/RestrictedProduct/TopologicalSpace.lean,Mathlib/Topology/Constructions.lean,Mathlib/Topology/Maps/Basic.lean,Mathlib/Topology/MetricSpace/HausdorffAlexandroff.lean,Mathlib/Topology/MetricSpace/Isometry.lean,Mathlib/Topology/NhdsWithin.lean 37 2 ['github-actions', 'mathlib-merge-conflicts'] nobody
1-78251
1 day ago
10-23205
10 days ago
0-7302
2 hours
39205 ooovi
author:ooovi
 feat(Geometry/Convex): Bundled convex set Add a bundled version of `IsConvexSet`. --- Once the dependencies are merged, this PR only changes `Mathlib.Geometry.Convex.Set` and `Mathlib.Geometry.Convex.Hull`, at the bottom of the file, adding `ConvexSet` and everything in the corresponding namespace. - [ ] depends on: #38934 - [ ] depends on: #38905 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) large-import blocked-by-other-PR merge-conflict 989/172 Mathlib.lean,Mathlib/Analysis/Convex/MetricSpace.lean,Mathlib/Data/Finsupp/Basic.lean,Mathlib/Geometry/Convex/ConvexSpace/AffineSpace.lean,Mathlib/Geometry/Convex/ConvexSpace/Defs.lean,Mathlib/Geometry/Convex/Hull.lean,Mathlib/Geometry/Convex/README.md,Mathlib/Geometry/Convex/Set.lean 8 6 ['github-actions', 'martinwintermath', 'mathlib-dependent-issues', 'mathlib-merge-conflicts'] nobody
1-40645
1 day ago
unknown
0-0
0 seconds
38837 kbuzzard
author:kbuzzard
 feat: add "higher instance priority" library note We add a library note explaining the logic in making instances like `Semiring.toModule` higher priority than the default. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) - [x] depends on: #38704 [only because one of the claims in the note is false without it] 19/0 Mathlib/Algebra/Group/Action/Defs.lean,Mathlib/Algebra/GroupWithZero/Action/Defs.lean,Mathlib/Algebra/HierarchyDesign.lean,Mathlib/Algebra/Module/Defs.lean 4 5 ['github-actions', 'kbuzzard', 'mathlib-dependent-issues', 'mathlib-merge-conflicts'] nobody
0-41028
11 hours ago
12-9133
12 days ago
12-82015
12 days
36275 smmercuri
author:smmercuri
 feat: norm for the finite adele ring of a number field --- - [x] depends on: #35820 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) 137/1 Mathlib.lean,Mathlib/NumberTheory/NumberField/Completion/FinitePlace.lean,Mathlib/NumberTheory/NumberField/FiniteAdeleRing.lean,Mathlib/Topology/Algebra/Valued/NormedValued.lean 4 4 ['github-actions', 'mathlib-dependent-issues', 'mathlib-merge-conflicts'] nobody
0-40475
11 hours ago
0-40548
11 hours ago
0-41519
11 hours
39666 kim-em
author:kim-em
 feat(ci): cross-reference tag review via post-build lint + workflow_run Cross-reference tag review for PRs adding `@[stacks ...]`, `@[kerodon ...]`, or `@[wikidata ...]` attributes — implemented as a post-build lint step plus a `workflow_run`-triggered companion that posts the bot comment. **Why this shape.** The previous iteration of this PR ran an independent `pull_request_target` workflow that text-parsed PR source files. That was a workaround for not having a built Mathlib environment available in CI. With a post-build lint step we _do_ have the elaborated environment — so we read `Mathlib.CrossRef.tagExt` directly via `importModules (loadExts := true)` and cut ~250 LOC of bespoke byte-level scanner. **The three pieces:** - `scripts/crossref.lean` — the `extract` subcommand is gone. New `check --diff --tsv ` subcommand walks `tagExt`, looks up each tagged declaration's source module via `env.getModuleFor?`, filters by `git diff --name-only` of the PR range, and writes a machine-readable TSV. No Markdown, no network, no snippet fetching — that's the privileged workflow's job. Note: `withImportModules` passes `loadExts := false` and would leave `tagExt` empty for imported modules; we use `importModules (loadExts := true)` instead. - `.github/workflows/build_template.yml` — three new steps in `post_steps`, after the existing import-graph upload: 1. `lake env lean --run scripts/crossref.lean check --diff "${BASE_SHA}..HEAD" --tsv crossref-added.tsv` 2. Write `crossref-context.json` carrying the PR number and head SHA (so the `workflow_run` job doesn't have to rely on the unreliable `workflow_run.pull_requests[0].number`). 3. Upload both as a single `crossref-context` artifact. - `.github/workflows/crossref_review.yml` — rewritten. Trigger flips from `pull_request_target` to `workflow_run` on the build workflows. Downloads the artifact, resolves the PR number through a three-stage fallback (artifact JSON → workflow_run payload → `gh pr list` head SHA match), calls the mathlib-ci orchestrator (which now consumes the TSV and fetches snippets in Python directly with parallel `ThreadPoolExecutor` for Stacks/Kerodon), and posts via `update_PR_comment.sh`. Fails the check on any `missing` tag. **Privilege model.** The lint step runs with the PR's permissions and produces only a machine-readable TSV. The `workflow_run` job runs in the base ref's permission scope (with `pull-requests: write`), never executes anything from the artifact, fetches snippets server-side from three fixed upstream APIs, and builds the Markdown comment in trusted code. - [x] depends on: #39664 - [x] depends on: https://github.com/leanprover-community/mathlib-ci/pull/39 (rewrites the orchestrator to consume the TSV) 🤖 Prepared with Claude Code blocked-by-other-PR 1182/25 .github/workflows/build_template.yml,.github/workflows/crossref_review.yml,Mathlib.lean,Mathlib/Tactic.lean,Mathlib/Tactic/CrossRef/Fetch.lean,Mathlib/Tactic/CrossRefAttribute.lean,Mathlib/Tactic/Widget/CrossRefHover.lean,docs/workflows.md,scripts/README.md,scripts/crossref.lean 10 3 ['github-actions', 'kim-em', 'mathlib-dependent-issues'] nobody
0-34462
9 hours ago
unknown
0-0
0 seconds
39697 sorrachai
author:sorrachai
 feat(Data/Tree/Basic): add Membership instance, new notation, rename Tree Summary: 1. [Rename]([#CSLib > Splay tree PR: BinaryTree vs Tree @ 💬](https://leanprover.zulipchat.com/#narrow/channel/513188-CSLib/topic/Splay.20tree.20PR.3A.20BinaryTree.20vs.20Tree/near/596482765)) from Tree to BinaryTree, which propagates the changes to other files that use it. 2. Add membership instance, prove decidability of membership. 3. Add toListInOrder, toListPreOrder, toListPostOrder Suggestion based on the discussion in the cslib [thread](https://leanprover.zulipchat.com/#narrow/channel/513188-CSLib/topic/Splay.20tree.20PR/near/596568391)[#CSLib > Splay tree PR @ 💬](https://leanprover.zulipchat.com/#narrow/channel/513188-CSLib/topic/Splay.20tree.20PR/near/596568391). new-contributor 187/75 Mathlib/Combinatorics/Enumerative/Catalan/Tree.lean,Mathlib/Combinatorics/Enumerative/DyckWord.lean,Mathlib/Data/Tree/Basic.lean,Mathlib/Data/Tree/Get.lean,Mathlib/Data/Tree/Traversable.lean,Mathlib/Tactic/CancelDenoms/Core.lean,docs/overview.yaml 7 4 ['eric-wieser', 'github-actions', 'sorrachai'] nobody
0-26794
7 hours ago
0-29071
7 hours ago
0-30837
8 hours
39664 kim-em
author:kim-em
 feat(CrossRefAttribute): info-view widget for cross-reference tags This PR teaches the info view to show the upstream label and description when the cursor sits on a `@[stacks ...]`, `@[kerodon ...]`, or `@[wikidata ...]` attribute. The fetch is on-demand via an RPC call from the widget to the Lean server, which shells out to `curl`; we deliberately do not fetch at attribute-elaboration time so offline builds stay clean and the only network access is when an editing session opens the panel. Two new modules and a small refactor to the existing one: - `Mathlib/Tactic/CrossRef/Fetch.lean` (new) holds the `Database` enum and the snippet-fetch logic. The companion `scripts/crossref-snippet.lean` in the stacked PR reimplements the same logic standalone for CI usage; the two are kept in sync deliberately so the CI script doesn't need a Mathlib build. - `Mathlib/Tactic/Widget/CrossRefHover.lean` (new) defines the widget itself: an `RpcEncodable` props record, a `RequestM` RPC method that calls `fetchSnippet`, and a `mk_rpc_widget%` Component that renders the result as `Html`. - `Mathlib/Tactic/CrossRefAttribute.lean` (modified) imports the two new modules, removes the now-duplicated `Database` / `databaseURL` / `databaseLabel` definitions, and calls `Widget.savePanelWidgetInfo` in each attribute's `add` handler. Tag storage, docstring rewriting, and the trace commands are untouched, and the existing `MathlibTest/CrossRefAttribute.lean` suite continues to pass — none of the behaviour visible to it changes. If `curl` is missing or the upstream site is unreachable, the widget renders an inline error instead of blocking the LSP. - [x] depends on: #39662 🤖 Prepared with Claude Code blocked-by-other-PR 1353/25 Mathlib.lean,Mathlib/Tactic.lean,Mathlib/Tactic/CrossRef/Fetch.lean,Mathlib/Tactic/CrossRefAttribute.lean,Mathlib/Tactic/Widget/CrossRefHover.lean,scripts/README.md,scripts/crossref.lean 7 10 ['eric-wieser', 'github-actions', 'jcommelin', 'kim-em', 'mathlib-dependent-issues'] nobody
0-7052
1 hour ago
unknown
0-0
0 seconds

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