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: March 17, 2026 at 06:13 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 2307 open PRs overall. Among these PRs

Approved, not yet landed PRs

At the moment,

Review status

There are currently 437 PRs awaiting review. Among these,

On the other hand, 40 PRs are unassigned and have not seen a status change in three days, and 71 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
35656 euprunin
author:euprunin
 chore(ModelTheory): golf proofs This PR removes unused `have`/`haveI`/`let`/`letI` calls. The goal of this golfing PR is to decrease the number of times lemmas are called explicitly (replacing calls to lemmas with calls to tactics). 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): * `FirstOrder.Field.realize_genericMonicPolyHasRoot`: unchanged 🎉 * `FirstOrder.Language.exists_cg_is_age_of`: unchanged 🎉 * `FirstOrder.Language.Theory.models_formula_iff_onTheory_models_equivSentence`: unchanged 🎉 * `FirstOrder.Language.Sentence.realize_cardGe`: unchanged 🎉 * `FirstOrder.Language.Ultraproduct.boundedFormula_realize_cast`: unchanged 🎉 Profiled using `set_option trace.profiler true in`. This golfing PR is batched under the following guidelines: * Up to ~5 changed files per PR * Up to ~25 changed declarations per PR * Up to ~100 changed lines per PR --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-logic 3/16 Mathlib/ModelTheory/Algebra/Field/IsAlgClosed.lean,Mathlib/ModelTheory/Fraisse.lean,Mathlib/ModelTheory/Satisfiability.lean,Mathlib/ModelTheory/Semantics.lean,Mathlib/ModelTheory/Ultraproducts.lean 5 6 ['euprunin', 'github-actions', 'leanprover-radar', 'vihdzp'] nobody 1
17-84846
17 days ago
22-30951
22 days ago
22-30906
22 days
35415 joneugster
author:joneugster
 feat(Cache): enable partial cache in downstream projects Migrated to fork from: #21238. Add features to `cache` and cleanup code: * enable partial cache retrieval in downstream projects: `lake exe cache get MyProject.Basic` downloads only the relevant cache to build `MyProject/Basic.lean` --- - [x] depends on: #21834 ### 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 - #21848 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) CI t-meta 34/15 Cache/Hashing.lean,Cache/IO.lean,Cache/Main.lean 3 3 ['github-actions', 'mathlib-dependent-issues', 'mathlib-merge-conflicts'] nobody none
17-55903
17 days ago
17-55925
17 days ago
20-7975
20 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. *(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 95/0 Mathlib.lean,Mathlib/Logic/Equiv/ListNatBijective.lean 2 4 ['AlexeyMilovanov', 'SnirBroshi', 'github-actions'] nobody none
17-30904
17 days ago
17-39976
17 days ago
17-40388
17 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 323/0 Mathlib.lean,Mathlib/Combinatorics/SimpleGraph/Extremal/ErdosStoneSimonovits.lean 2 3 ['github-actions', 'mathlib-dependent-issues', 'mathlib4-merge-conflict-bot'] nobody none
14-84661
14 days ago
14-84661
14 days ago
14-84662
14 days
35627 SnirBroshi
author:SnirBroshi
 feat(Combinatorics/SimpleGraph/Finite): min/max degrees of top/bot And a couple of lemmas about `IsRegularOfDegree`, e.g. the empty graph is regular of any degree. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-combinatorics 28/1 Mathlib/Combinatorics/SimpleGraph/Finite.lean,Mathlib/Combinatorics/SimpleGraph/StronglyRegular.lean 2 6 ['SnirBroshi', 'github-actions', 'vlad902'] nobody 1
13-1896
13 days ago
23-8645
23 days ago
23-8600
23 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 using a proof by 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 95/0 Mathlib/Combinatorics/SimpleGraph/Acyclic.lean,Mathlib/Combinatorics/SimpleGraph/Walks/Operations.lean 2 4 ['SnirBroshi', 'github-actions', 'vbeffara', 'vlad902'] nobody none
12-55881
12 days ago
30-23535
30 days ago
30-23490
30 days
35600 yisiox
author:yisiox
 feat(Computability): add Kleene's algorithm to prove regular languages have regex matching This PR adds a proof that every regular language has some regular expression matching it. This was achieved by the following constructions and proofs of their correctness - Define `toSingleεNFA` to transform any epsilon-NFA to an equivalent one with only a single start and accept state (and the type is `ExtendedState`) - Define a bijection between `ExtendedState` and `Fin (FinEnum.card (ExtendedState σ))` to index the states - Define `pathRegex` which implements Kleene's algorithm - Define `toRegex` which takes an epsilon-NFA, applies `toSingleεNFA` on it, and computes the corresponding regex using `pathRegex` The proofs of correctness chain together to yield `(toRegex M).matches' = M.accepts` which asserts the direction of Kleene's theorem required. As in [#mathlib4 > Regular languages: the review queue @ 💬](https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/Regular.20languages.3A.20the.20review.20queue/near/573958148), this overlaps with #15654, which uses GNFA instead but has been inactive. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-computability new-contributor 499/0 Mathlib/Computability/EpsilonNFA.lean 1 2 ['github-actions'] nobody none
11-40592
11 days ago
unknown
0-0
0 seconds
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 151/0 Mathlib.lean,Mathlib/Combinatorics/SimpleGraph/Contraction.lean,Mathlib/Combinatorics/SimpleGraph/Minor.lean 3 2 ['github-actions'] nobody none
11-23649
11 days ago
11-23711
11 days ago
11-24357
11 days
36308 SnirBroshi
author:SnirBroshi
 feat(Combinatorics/SimpleGraph/Subgraph): a couple of `subgraphOfAdj` lemmas --- Also golfed a lemma (it's one line longer but it looks simpler to me). [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-combinatorics 14/5 Mathlib/Combinatorics/SimpleGraph/Subgraph.lean 1 1 ['github-actions'] nobody none
9-84312
9 days ago
9-84384
9 days ago
9-84339
9 days
36307 SnirBroshi
author:SnirBroshi
 feat(Combinatorics/SimpleGraph/Walks): `Walk.ofSupport` / `Walk.ofDarts` --- This would hopefully make constructions such as [the cycle in `cycleGraph`](https://github.com/leanprover-community/mathlib4/blob/1b2df6c93fdd0ece89a32521464d5193e0f381ed/Mathlib/Combinatorics/SimpleGraph/Circulant.lean#L140-L155) or [the path in `pathGraph`](https://github.com/leanprover-community/mathlib4/pull/34171) or [the Hamiltonian walk in the complete graph](https://leanprover.zulipchat.com/#narrow/channel/144837-PR-reviews/topic/Ore's.20Theorem/near/571353615) easier. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-combinatorics 88/0 Mathlib/Combinatorics/SimpleGraph/Walks/Basic.lean,Mathlib/Combinatorics/SimpleGraph/Walks/Operations.lean 2 1 ['github-actions'] nobody none
8-14712
8 days ago
9-85589
9 days ago
9-85544
9 days
35657 Rida-Hamadani
author:Rida-Hamadani
 feat(SimpleGraph): distance equal or greater than two in terms of common neighborhood Two lemmas classifying distances between two vertices according two their common neighborhood. This is the fork version of #12278. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-combinatorics 33/0 Mathlib/Combinatorics/SimpleGraph/Metric.lean,Mathlib/Data/ENat/Basic.lean 2 9 ['Rida-Hamadani', 'SnirBroshi', 'github-actions', 'vlad902'] nobody none
6-54032
6 days ago
6-53836
6 days ago
11-39779
11 days
36451 SnirBroshi
author:SnirBroshi
 feat(Combinatorics/SimpleGraph/Matching): `edgeSet` is injective and strictly monotonic on matchings, and more API --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-combinatorics 45/11 Mathlib/Combinatorics/SimpleGraph/Matching.lean,Mathlib/Combinatorics/SimpleGraph/Subgraph.lean,Mathlib/Data/Sym/Sym2.lean 3 1 ['github-actions'] nobody none
6-40911
6 days ago
6-41528
6 days ago
6-41616
6 days
35649 JovanGerb
author:JovanGerb
 feat(Order/GaloisConnection/Defs): use `to_dual` for `GaloisInsertion`/`GaloisCoinsertion` This PR uses `to_dual` to generate declarations about `GaloisCoinsertion` from those for `GaloisInsertion`. - An entry is added to the name translation dictionary for this particular name translation. - One lemma in another file had to be tagged. - Some uses of `to_dual` have been replaced with `to_dual none`, because I had written them before `to_dual none` existed. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-order 42/84 Mathlib/Algebra/Group/Submonoid/Units.lean,Mathlib/Order/GaloisConnection/Defs.lean,Mathlib/Order/Monotone/Defs.lean,Mathlib/Tactic/Translate/ToDual.lean,Mathlib/Topology/Order.lean 5 5 ['JovanGerb', 'github-actions', 'mathlib-merge-conflicts', 'vihdzp'] nobody 1
6-20568
6 days ago
6-20597
6 days ago
9-56831
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 72/3 Mathlib/Combinatorics/SimpleGraph/AdjMatrix.lean 1 9 ['SnirBroshi', 'eric-wieser', 'github-actions'] nobody none
6-1895
6 days ago
6-16861
6 days ago
7-41907
7 days
36497 eric-wieser
author:eric-wieser
 feat: add missing rfl lemmas for WriterT.run The `FreeM` example in CSLib that demonstrates an alternate construction of `WriterT` suffers from this API being absent, and results to agressively unfolding everything. This also adds some missing `.run`s to fix defeq abuse. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-data 68/16 Mathlib/Control/Monad/Writer.lean 1 1 ['github-actions'] nobody none
5-28754
5 days ago
5-28823
5 days ago
5-28875
5 days
36505 eric-wieser
author:eric-wieser
 fix: use `MonadExceptOf` instead of `MonadExcept` for `ContT` and `WriterT` This matches how `ReaderT` and `StateT` do this in core. Also adds some missing `rfl` lemmas, and fixes a stray `id` that should be `Id`. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-data 25/4 Mathlib/Control/Monad/Cont.lean,Mathlib/Control/Monad/Writer.lean 2 1 ['github-actions'] nobody none
5-20271
5 days ago
5-22748
5 days ago
5-22703
5 days
35906 scp020
author:scp020
 feat(Combinatorics/SimpleGraph/Walks): add Walk.IsChord and Walk.IsChordless Add `Walk.IsChord` and `Walk.IsChordless` predicates in a new file `SimpleGraph/Walks/Chords.lean`. See "chord" in https://en.wikipedia.org/wiki/Glossary_of_graph_theory Discussion on Zulip: [Zulip link](https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/Walk.2EIsChordless.20live.20in.20mathlib.3F/with/575277309) authored-by: Tianyi Zhao --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-combinatorics new-contributor 68/0 Mathlib.lean,Mathlib/Combinatorics/SimpleGraph/Walks/Chords.lean 2 11 ['SnirBroshi', 'github-actions', 'scp020'] nobody none
5-12981
5 days ago
13-15863
13 days ago
14-66569
14 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 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 4 ['JovanGerb', 'MichaelStollBayreuth', 'Parcly-Taxel', 'github-actions'] nobody none
4-72831
4 days ago
12-14337
12 days ago
12-16407
12 days
36335 SnirBroshi
author:SnirBroshi
 feat(Combinatorics/SimpleGraph/LapMatrix): {`adjMatrix`/`degMatrix`/`lapMatrix`} are Hermitian Also a small cleanup and golf. This should let us access the eigenvalues of these matrices, for spectral graph theory. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-combinatorics 33/19 Mathlib/Combinatorics/SimpleGraph/AdjMatrix.lean,Mathlib/Combinatorics/SimpleGraph/LapMatrix.lean 2 2 ['github-actions', 'themathqueen'] nobody none
4-59060
4 days ago
4-61562
4 days ago
8-78402
8 days
35622 SnirBroshi
author:SnirBroshi
 feat(Logic/Function/Basic): `onFun` and `swap` preserve relation properties --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-logic 141/19 Mathlib/Data/DFinsupp/WellFounded.lean,Mathlib/Logic/Function/Basic.lean,Mathlib/Logic/Function/Defs.lean,Mathlib/Order/Defs/Unbundled.lean,Mathlib/Order/OrderIsoNat.lean,Mathlib/Order/RelClasses.lean,Mathlib/Order/WellFounded.lean,Mathlib/Order/WithBot.lean 8 7 ['SnirBroshi', 'github-actions', 'leanprover-radar', 'vihdzp'] nobody 1
4-44217
4 days ago
11-9210
11 days ago
22-79416
22 days
35905 Jun2M
author:Jun2M
 feat(Combinatorics/Graph): Add definitions for small graphs (noEdge, bouquet, banana) This pull request adds new constructors and supporting lemmas for special types of graphs in the `Mathlib/Combinatorics/Graph/Basic.lean` file. It introduces: * `Graph.noEdge V`: The graph with vertex set V and empty edge set. * `Graph.bouquet v E`: The graph with vertex set {v} and edge set E, where all edges are loops at v. * `Graph.banana u v E`: The graph with vertex set {u, v} and edge set E, where all edges connect u and v. along with various properties and characterizations for these graphs. Co-authored-by: Peter Nelson [apn.uni@gmail.com](mailto:apn.uni@gmail.com) --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-combinatorics 126/0 Mathlib/Combinatorics/Graph/Basic.lean 1 3 ['Jun2M', 'github-actions', 'lauramonk'] nobody none
4-42551
4 days ago
16-11394
16 days ago
16-11777
16 days
36539 SnirBroshi
author:SnirBroshi
 feat(SetTheory/Ordinal/Basic): the `#s`-th element of `α` is an upper-bound for the set's mex This is a translation of `card_typein_min_le_mk` to be in terms of `α`. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-set-theory 42/5 Mathlib/AlgebraicGeometry/Properties.lean,Mathlib/Data/Set/Basic.lean,Mathlib/SetTheory/Ordinal/Basic.lean 3 8 ['SnirBroshi', 'b-mehta', 'github-actions', 'vihdzp'] nobody none
4-27030
4 days ago
4-27094
4 days ago
4-33657
4 days
36571 harahu
author:harahu
 doc(Combinatorics): fix typos Found by `PyCharm`'s code inspection tool. Fixes were made by Codex. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-combinatorics 25/25 Mathlib/Combinatorics/Colex.lean,Mathlib/Combinatorics/Enumerative/DoubleCounting.lean,Mathlib/Combinatorics/Enumerative/IncidenceAlgebra.lean,Mathlib/Combinatorics/Matroid/Basic.lean,Mathlib/Combinatorics/Matroid/Circuit.lean,Mathlib/Combinatorics/Matroid/Map.lean,Mathlib/Combinatorics/Matroid/Minor/Contract.lean,Mathlib/Combinatorics/Matroid/Rank/ENat.lean,Mathlib/Combinatorics/Nullstellensatz.lean,Mathlib/Combinatorics/SetFamily/FourFunctions.lean,Mathlib/Combinatorics/SimpleGraph/Acyclic.lean,Mathlib/Combinatorics/SimpleGraph/Bipartite.lean,Mathlib/Combinatorics/SimpleGraph/Extremal/TuranDensity.lean,Mathlib/Combinatorics/SimpleGraph/FiveWheelLike.lean,docs/references.bib 15 1 ['github-actions'] nobody none
4-23219
4 days ago
4-24212
4 days ago
4-24167
4 days
35963 Parcly-Taxel
author:Parcly-Taxel
 refactor: review Kleene algebra axioms Derive ```lean one_add_mul_kstar (a : α) : 1 + a * a∗ = a∗ one_add_kstar_mul (a : α) : 1 + a∗ * a = a∗ ``` which is Proposition 2 in Kozen's 1994 paper. We also remove the `bot` and `bot_le` fields in `IdemSemiring`, since the remaining axioms already show `0 ≤ a` for all `a`. t-algebra
label:t-algebra$
 82/81 Mathlib/Algebra/Algebra/Operations.lean,Mathlib/Algebra/Order/Kleene.lean,Mathlib/AlgebraicGeometry/IdealSheaf/Basic.lean 3 13 ['Parcly-Taxel', 'dagurtomas', 'github-actions', 'plp127', 'vihdzp'] nobody none
4-3094
4 days ago
4-3145
4 days ago
14-26972
14 days
34717 CoolRmal
author:CoolRmal
 feat: add more APIs for the first derivative test The derivative test in Mathlib right now only says whether a point is local maximum. This is hard to use in practice (for example in the [PNT](https://github.com/AlexKontorovich/PrimeNumberTheoremAnd) project) as we sometimes want to show that a point is a maximum on some interval. This PR adds more APIs for the first derivative test to resolve this issue. Co-authored-by: Louis Liu @Deep0Thinking --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-analysis t-order 412/32 Mathlib/Analysis/Calculus/DerivativeTest.lean,Mathlib/Topology/Order/OrderClosedExtr.lean 2 4 ['CoolRmal', 'MichaelStollBayreuth', 'github-actions'] nobody none
3-80157
3 days ago
42-73453
42 days ago
0-25
25 seconds
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/) 18/32 Mathlib/Topology/Algebra/Valued/WithVal.lean 1 3 ['github-actions', 'mathlib-dependent-issues', 'mathlib-merge-conflicts'] nobody none
3-76399
3 days ago
4-26390
4 days ago
4-81332
4 days
33731 nielsvoss
author:nielsvoss
 feat(Analysis/InnerProductSpace): definition of singular values for finite-dimensional inner product spaces This PR defines the singular values for linear maps between finite-dimensional inner product spaces. The API is designed in a way that allows it to be generalized to the approximation numbers, as defined in #32126. See the discussion on Zulip: https://leanprover.zulipchat.com/#narrow/channel/217875-Is-there-code-for-X.3F/topic/Singular.20Value.20Decomposition/with/558914024 --- - [x] depends on: #34362 - [x] depends on: #34660 - [x] depends on: #35174 - [x] depends on: #35236 - [x] depends on: #35582 - [x] depends on: #36106 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-analysis new-contributor 216/0 Mathlib.lean,Mathlib/Analysis/InnerProductSpace/SingularValues.lean 2 27 ['b-mehta', 'dupuisf', 'eric-wieser', 'github-actions', 'j-loreaux', 'mathlib-dependent-issues', 'nielsvoss', 'themathqueen'] nobody none
3-73315
3 days ago
3-73191
3 days ago
3-73458
3 days
36201 themathqueen
author:themathqueen
 feat(Analysis/CStarAlgebra): set of star projections equals the extreme points of the nonnegative closed unit ball An element in a non-unital C⋆-algebra is a projection iff it is an extreme point of the nonnegative closed unit ball. This is from 1.6.2 in Sakai's C⋆-algebras and W⋆-algebras (the proof is different though). Co-authored-by: Jon Bannon <59937998+JonBannon@users.noreply.github.com> --- - [x] depends on: #35997 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-analysis 96/0 Mathlib.lean,Mathlib/Analysis/CStarAlgebra/Extreme.lean,docs/references.bib 3 4 ['github-actions', 'j-loreaux', 'mathlib-dependent-issues', 'themathqueen'] nobody none
3-68914
3 days ago
3-68965
3 days ago
5-58680
5 days
36376 jessealama
author:jessealama
 feat(SimpleGraph): bridge from Perm.IsCycle to IsHamiltonian This PR provides `IsHamiltonian.ofPerm`, 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/Combinatorics/SimpleGraph/Walks/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` - `Walk.iterate_length`, `Walk.iterate_getVert`, `Walk.iterate_support`, `Walk.iterate_edges`: 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`**: - `Perm.toList_eq_range_map_pow`: expresses `toList` as a range map over powers **`Mathlib/Combinatorics/SimpleGraph/Hamiltonian.lean`**: - `edge_ne_of_isCycleOn`: edge distinctness for cycle-on permutations - `IsHamiltonian.ofPerm`: the main theorem large-import 158/0 Mathlib.lean,Mathlib/Combinatorics/SimpleGraph/Hamiltonian.lean,Mathlib/Combinatorics/SimpleGraph/Walks/Iterate.lean,Mathlib/GroupTheory/Perm/Cycle/Basic.lean,Mathlib/GroupTheory/Perm/Cycle/Concrete.lean 5 33 ['SnirBroshi', 'github-actions', 'jessealama', 'mathlib-merge-conflicts'] nobody none
3-68725
3 days ago
3-73725
3 days ago
6-81785
6 days
36594 Vierkantor
author:Vierkantor
 chore(Tactic): rewrite `lift` tactic docstring This PR rewrites the docstrings for the `lift` tactic, to make sure they are complete while not getting too long. The main change, apart from restructuring the bullet points to fit the style guide, is to treat the form `lift e to t with x`, where `e` is any expression, as the "general" form, and the case where `e` is a variable as a specialized form. Although it doesn't match the historical development, I think this is clearer for new users (since explaining `lift` without `with` as a special case can be done with only one line). Similarly, we separate `using` into its own bullet point. In this docstring I did not include the alternative form `lift e to t with x rfl`, since it is exactly equivalent to `lift e to to with x` as far as I can tell. I did include `lift e to t with x rfl h`, because it is useful for preserving the `using` hypothesis without naming the introduced equality. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) documentation t-meta 61/33 Mathlib/Tactic/Lift.lean 1 1 ['github-actions'] nobody none
3-67147
3 days ago
3-67220
3 days ago
3-67175
3 days
36593 joelriou
author:joelriou
 feat(Algebra/Homology): first step of a factorization lemma This is the first in a series of three PRs towards #35813 which shall show that if `f : K ⟶ L` is a morphism between bounded below cochain complexes in an abelian category with enough injectives, then there exists a factorization `ι ≫ π = f` with `ι : K ⟶ K'` a monomorphism that is also a quasi-isomorphism and `π : K' ⟶ L` a morphism which degreewise is an epimorphism with an injective kernel, while `K'` is also bounded below (with precise bounds depending on the available bounds for `K` and `L`). The construction of the intermediate object `K'` is obtained by taking a degreewise eventually constant projective limit of cochain complexes, where the complexes in the projective system are constructed step by step. Each step decomposes further into two lemmas `step₁` and `step₂`. In this PR, we prove `step₁`. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-category-theory t-algebra
label:t-algebra$
 248/0 Mathlib.lean,Mathlib/Algebra/Homology/Factorizations/CM5a.lean 2 2 ['github-actions', 'joelriou'] nobody none
3-59990
3 days ago
3-60051
3 days ago
3-60454
3 days
36596 harahu
author:harahu
 chore(Algebra): fix markdown list indentation We replace lazy continuation lines in lists with either: - indented lines, to signify that the line is indeed a continuation line; or - a newline, where the continuation line(s) were in fact intended to be disconnected from the list. We do this because lazy continuation is a markdown footgun that one does well to avoid. We also standardize indentation such that continuation lines now line up with the first line of the item they're continuing. This seems to be the solution enforced by markdown formatters, e.g. `mdformat`. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra
label:t-algebra$
 36/27 Mathlib/Algebra/ContinuedFractions/Basic.lean,Mathlib/Algebra/ContinuedFractions/Computation/CorrectnessTerminating.lean,Mathlib/Algebra/ContinuedFractions/Computation/Translations.lean,Mathlib/Algebra/DirectSum/Finsupp.lean,Mathlib/Algebra/FreeAlgebra.lean,Mathlib/Algebra/Group/Conj.lean,Mathlib/Algebra/Homology/ShortComplex/ExactFunctor.lean,Mathlib/Algebra/Module/FinitePresentation.lean,Mathlib/Algebra/Order/Hom/Basic.lean,Mathlib/Algebra/Polynomial/EraseLead.lean,Mathlib/Algebra/Polynomial/Inductions.lean,Mathlib/Algebra/Polynomial/Laurent.lean 12 1 ['github-actions'] nobody none
3-54055
3 days ago
unknown
0-0
0 seconds
36456 b-mehta
author:b-mehta
 feat(ENat): relate ENat to finset sums and products The names and statements are picked to mimic https://leanprover-community.github.io/mathlib4_docs/Mathlib/Data/ENNReal/BigOperators.html. - [x] depends on: #36454 - [x] depends on: #36452 t-data large-import 75/1 Mathlib/Data/ENat/BigOperators.lean 1 3 ['b-mehta', 'github-actions', 'mathlib-dependent-issues'] nobody none
3-46095
3 days ago
3-46158
3 days ago
3-47114
3 days
35865 vihdzp
author:vihdzp
 chore: review `Cardinal.ord` API This PR does the following: - Mark `Cardinal.ord` as no expose. - Prove the defining property `gciOrdCard` earlier. - Deprecate the unused `ord.orderEmbedding` (it simply restates that the function is strictly monotonic). - Rename `ord_nat` → `ord_natCast`. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-set-theory 45/39 Mathlib/SetTheory/Cardinal/Aleph.lean,Mathlib/SetTheory/Cardinal/Cofinality.lean,Mathlib/SetTheory/Ordinal/Arithmetic.lean,Mathlib/SetTheory/Ordinal/Basic.lean 4 2 ['github-actions', 'mathlib-merge-conflicts'] nobody none
3-43619
3 days ago
3-43641
3 days ago
13-71179
13 days
36298 ocfnash
author:ocfnash
 feat: define bases of semisimple Lie algebras and add API --- - [x] depends on: #36297 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra
label:t-algebra$
 569/0 Mathlib.lean,Mathlib/Algebra/Lie/Basis.lean,Mathlib/LinearAlgebra/Basis/Basic.lean 3 2 ['github-actions', 'mathlib-dependent-issues'] nobody none
3-39915
3 days ago
3-74735
3 days ago
3-74691
3 days
36603 themathqueen
author:themathqueen
 feat(Analysis/Convex/Strict/Extreme): `extremePoints ℝ (Icc a b) = {a, b}` Also provide `StrictConvexSpace ℝ ℝ` instance without needing to invoke the inner product space. Co-authored-by: Jireh Loreaux --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-analysis easy 15/0 Mathlib/Analysis/Convex/Extreme.lean,Mathlib/Analysis/Convex/Strict/Extreme.lean,Mathlib/Analysis/Convex/StrictConvexSpace.lean,Mathlib/Analysis/Normed/Group/Real.lean 4 1 ['github-actions'] nobody none
3-37001
3 days ago
3-53312
3 days ago
3-53267
3 days
36617 j-loreaux
author:j-loreaux
 feat: add `IsSemitopologicalRing` With the recent addition of the class `SeparatelyContinuousMul`, it becomes possible to define `IsSemitopologicalRing` (and a version for semirings). A *semitopological ring* is a ring with jointly continuous addition and separately continuous multiplication (and continuous negation, but this is implied by the other two). Such structures arise quite frequently in functional analysis. This PR defines these classes and then generalizes a number of things in the library. For example, the topological closures of ring-like structures only need multiplication to be separately continuous (they also only need addition to be separately continuous, but ring-like structures for which addition is separately but not jointly continuous do not generally arise in practice). In addition, this allows us to weaken the conditions of instances pertaining to `ContinuousMap.UniqueHom` and `ContinuousMapZero.UniqueHom` which are used in the continuous functional calculus. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-topology t-algebra
label:t-algebra$
 241/102 Mathlib/Analysis/CStarAlgebra/ContinuousFunctionalCalculus/Commute.lean,Mathlib/Analysis/CStarAlgebra/ContinuousFunctionalCalculus/Continuity.lean,Mathlib/Analysis/CStarAlgebra/ContinuousFunctionalCalculus/Instances.lean,Mathlib/Analysis/CStarAlgebra/ContinuousFunctionalCalculus/Unique.lean,Mathlib/Analysis/SpecialFunctions/ContinuousFunctionalCalculus/ExpLog/Basic.lean,Mathlib/Analysis/SpecialFunctions/ContinuousFunctionalCalculus/PosPart/Basic.lean,Mathlib/Analysis/SpecialFunctions/ContinuousFunctionalCalculus/Rpow/Basic.lean,Mathlib/Topology/Algebra/Algebra.lean,Mathlib/Topology/Algebra/NonUnitalAlgebra.lean,Mathlib/Topology/Algebra/NonUnitalStarAlgebra.lean,Mathlib/Topology/Algebra/Ring/Basic.lean,Mathlib/Topology/Algebra/StarSubalgebra.lean 12 1 ['github-actions'] nobody none
3-35387
3 days ago
3-35458
3 days ago
3-35413
3 days
36618 SnirBroshi
author:SnirBroshi
 feat(Order/RelClasses): `IsTrans` is redundant in `IsWellOrder` --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-order 13/14 Mathlib/Order/RelClasses.lean,Mathlib/SetTheory/ZFC/Ordinal.lean 2 1 ['github-actions', 'vihdzp'] nobody 1
3-18636
3 days ago
3-18698
3 days ago
3-21756
3 days
36612 JovanGerb
author:JovanGerb
 chore(Order/SuccPred/Basic): use `to_dual` more When this file was originally tagged with `to_dual`, the attribute was less capable. Now, we can tag almost everything in the file. This PR does the first half of the remaining tagging. The rest can be done in a future PR. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-order 35/150 Mathlib/Order/SuccPred/Basic.lean 1 1 ['github-actions', 'vihdzp'] nobody 1
3-18076
3 days ago
3-38048
3 days ago
3-38003
3 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 30/0 Mathlib/Order/UpperLower/Basic.lean 1 6 ['SnirBroshi', 'github-actions', 'vihdzp'] nobody none
3-13163
3 days ago
3-18756
3 days ago
3-18711
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
33963 gasparattila
author:gasparattila
 feat(Topology/UniformSpace/Closeds): completeness of `(Nonempty)Compacts` This PR generalizes the completeness result of `NonemptyCompacts` from metric spaces to uniform spaces. --- - [x] depends on: #34036 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-topology 71/8 Mathlib/Topology/MetricSpace/Closeds.lean,Mathlib/Topology/UniformSpace/Closeds.lean 2 3 ['github-actions', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] PatrickMassot
assignee:PatrickMassot
 none
47-64895
1 month ago
47-64913
47 days ago
58-54928
58 days
34268 gasparattila
author:gasparattila
 feat(Topology/Sets): continuity of operations on `(Nonempty)Compacts` --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-topology 144/17 Mathlib/Topology/Sets/Compacts.lean,Mathlib/Topology/Sets/VietorisTopology.lean,Mathlib/Topology/UniformSpace/Closeds.lean 3 2 ['github-actions', 'mathlib4-merge-conflict-bot'] PatrickMassot
assignee:PatrickMassot
 none
47-64236
1 month ago
47-64254
47 days ago
53-35644
53 days
34270 gasparattila
author:gasparattila
 feat(Topology/UniformSpace/Closeds): `(Nonempty)Compacts.toCloseds` is a closed embedding --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-topology 36/35 Mathlib/Topology/MetricSpace/Closeds.lean,Mathlib/Topology/UniformSpace/Closeds.lean 2 2 ['github-actions', 'mathlib4-merge-conflict-bot'] PatrickMassot
assignee:PatrickMassot
 none
47-63744
1 month ago
47-63763
47 days ago
53-34787
53 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 77/10 Mathlib/SetTheory/ZFC/Basic.lean,Mathlib/SetTheory/ZFC/Ordinal.lean,Mathlib/SetTheory/ZFC/PSet.lean 3 25 ['Komyyy', 'github-actions', 'mathlib4-merge-conflict-bot', 'staroperator', 'vihdzp'] alreadydone
assignee:alreadydone
 1
46-40633
1 month ago
46-40695
46 days ago
57-86065
57 days
33817 FlAmmmmING
author:FlAmmmmING
 fix(Combinatorics/Enumerative/Schroder.lean): Fix the definition and theorem 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 61/39 Mathlib/Combinatorics/Enumerative/Schroder.lean 1 19 ['FlAmmmmING', 'github-actions', 'vihdzp'] awainverse
assignee:awainverse
 none
46-18675
1 month ago
61-7951
61 days ago
65-59363
65 days
34227 stepan2698-cpu
author:stepan2698-cpu
 feat: If sum of densities is at least one, the sumset covers the naturals Proves an outstanding TODO item from Mathlib.Combinatorics.Schnirelmann : shows that if the sum of two densities is at least one, the sumset covers the positive naturals. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-combinatorics new-contributor 51/1 Mathlib/Combinatorics/Schnirelmann.lean 1 3 ['github-actions', 'grunweg', 'kbuzzard'] awainverse
assignee:awainverse
 none
46-18672
1 month ago
54-25047
54 days ago
54-39105
54 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 13 ['SnirBroshi', 'floor-licker', 'github-actions'] kmill
assignee:kmill
 none
45-18682
1 month ago
58-36371
58 days ago
58-39537
58 days
33520 NoneMore
author:NoneMore
 feat(ModelTheory/ElementarySubstructures): add a variant of Tarski-Vaught test taking sets as input There should exist an `ElementarySubstructure.copy` such that we can directly bundle the set itself instaed of its closure as an elementary substructure. The other direction depends on #33458. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-logic new-contributor 55/0 Mathlib/ModelTheory/ElementarySubstructures.lean 1 3 ['Citronhat', 'NoneMore', 'github-actions'] awainverse
assignee:awainverse
 none
44-18633
1 month ago
72-68254
72 days ago
72-68209
72 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 theorem exists_path_iff_isContained_pathGraph : (∃ (u v : V) (w : G.Path u v), w.val.support.length = n) ↔ pathGraph n ⊑ G := by sorry ``` (the last statement also requires #33121, this PR gives the right-to-left implication and that PR gives the left-to-right) [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-combinatorics 37/1 Mathlib/Combinatorics/SimpleGraph/Hasse.lean 1 9 ['SnirBroshi', 'github-actions', 'vihdzp', 'vlad902'] kmill
assignee:kmill
 none
43-131
1 month ago
54-24547
54 days ago
55-57335
55 days
32570 ksenono
author:ksenono
 feat(Combinatorics/SimpleGraph): bipartite subgraphs and vertex-disjoint graphs for Konig's theorem --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-combinatorics new-contributor 22/0 Mathlib/Combinatorics/SimpleGraph/Bipartite.lean,Mathlib/Combinatorics/SimpleGraph/Subgraph.lean 2 19 ['SnirBroshi', 'github-actions', 'jcommelin', 'ksenono', 'vlad902'] kmill
assignee:kmill
 1
41-28442
1 month ago
41-28442
41 days ago
93-64600
93 days
34191 IlPreteRosso
author:IlPreteRosso
 feat(Topology/Algebra/InfiniteSum): Discrete Convolution API 1st PR Defines the very basics of the discrete convolution API. In analogy with [MeasureTheory.Convolution](https://leanprover-community.github.io/mathlib4_docs/Mathlib/Analysis/Convolution.html#MeasureTheory.convolution). Main definitions include - `mulFiber`, `convolution`, `ConvolutionExists`, `ConvolutionExists.add_distrib`, `ConvolutionExistsAt.smul_convolution`, `mulFiber_swapEquiv`, `convolution_comm` RM: - The main docstring is *as is* - Next step is triple sum intrastrcutre + `assoc` theorems for convolution (long) Continues the work from #33411 and #33410 (splitting into shorter PRs, carries over the modifications from previous reviews) t-topology new-contributor 277/0 Mathlib.lean,Mathlib/Topology/Algebra/InfiniteSum/DiscreteConvolution.lean 2 18 ['IlPreteRosso', 'github-actions', 'j-loreaux'] PatrickMassot
assignee:PatrickMassot
 none
40-47548
1 month ago
40-47743
40 days ago
49-49381
49 days
34182 IlPreteRosso
author:IlPreteRosso
 feat(Data/Finsupp/Single, Data/Finsupp/Indicator): Add set_indicator_singleton, indicator_singleton; golfed single_eq_set_indicator, single_eq_indicator [Mathlib.Data.Finsupp.Single](https://leanprover-community.github.io/mathlib4_docs/Mathlib/Data/Finsupp/Single.html#Finsupp.single) - Add `set_indicator_singleton`, golfed `single_eq_set_indicator` [Mathlib.Data.Finsupp.Indicator](https://leanprover-community.github.io/mathlib4_docs/Mathlib/Data/Finsupp/Indicator.html#Finsupp.indicator_apply) - Add `indicator_singleton`, golfed `single_eq_indicator` Continues the work from #34095 large-import t-data new-contributor 17/17 Mathlib/Data/Finsupp/Indicator.lean,Mathlib/Data/Finsupp/Single.lean 2 29 ['IlPreteRosso', 'eric-wieser', 'github-actions', 'mathlib-bors', 'urkud'] eric-wieser and urkud
assignee:urkud assignee:eric-wieser
 none
38-48459
1 month ago
55-7076
55 days ago
55-15024
55 days
34151 gasparattila
author:gasparattila
 feat(Topology/Sets): product of `Closeds` --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-topology 30/0 Mathlib/Topology/MetricSpace/Closeds.lean,Mathlib/Topology/Sets/Closeds.lean,Mathlib/Topology/Sets/Compacts.lean 3 1 ['github-actions'] PatrickMassot
assignee:PatrickMassot
 none
38-42669
1 month ago
56-38842
56 days ago
56-38797
56 days
34093 YellPika
author:YellPika
 feat(Order/OmegaCompletePartialOrder): add `OmegaCompletePartialOrder` instance for `Option` with basic `ωScottContinuous` lemmas --- - [x] depends on: #33941 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-order new-contributor 297/0 Mathlib.lean,Mathlib/Data/Option/Order.lean,Mathlib/Order/Monotone/Basic.lean,Mathlib/Order/OmegaCompletePartialOrder.lean 4 5 ['YellPika', 'github-actions', 'mathlib-dependent-issues', 'mathlib-merge-conflicts'] pechersky
assignee:pechersky
 none
36-18752
1 month ago
41-1088
41 days ago
41-4007
41 days
34266 gasparattila
author:gasparattila
 feat(Topology/Sets): basis of `(Nonempty)Compacts` --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-topology 147/0 Mathlib/Topology/Bases.lean,Mathlib/Topology/Sets/VietorisTopology.lean 2 2 ['github-actions', 'mathlib4-merge-conflict-bot'] PatrickMassot
assignee:PatrickMassot
 none
36-18750
1 month ago
47-64687
47 days ago
53-41140
53 days
34756 Hagb
author:Hagb
 feat(Algebra/Order/Monoid/Unbundled/WithTop): `AddEquiv` between `WithBot` It is like `Equiv.withBotCongr` but preserving also addition (`AddEquiv`). --- It is like [`Equiv.withBotCongr`](https://leanprover-community.github.io/mathlib4_docs/find/?pattern=Equiv.withBotCongr#doc) but preserving also addition ([`AddEquiv`](https://leanprover-community.github.io/mathlib4_docs/find/?pattern=AddEquiv#doc)). [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra
label:t-algebra$
 39/0 Mathlib/Algebra/Order/Monoid/Unbundled/WithTop.lean 1 3 ['Hagb', 'github-actions', 'plp127'] mattrobball
assignee:mattrobball
 none
35-18485
1 month ago
39-18875
39 days ago
41-58800
41 days
34808 YaelDillies
author:YaelDillies
 feat(Combinatorics/SimpleGraph): isolated vertices RFC for now. Do you think this is a reasonable definition to have? What should its API be? From ProofBench --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) RFC t-combinatorics 3/0 Mathlib/Combinatorics/SimpleGraph/Basic.lean 1 1 ['github-actions'] kmill
assignee:kmill
 none
35-18480
1 month ago
41-33634
41 days ago
41-33589
41 days
26985 agjftucker
author:agjftucker
 feat(Analysis/Calculus/ImplicitFunction): define implicitFunctionOfProdDomain This PR continues the work from #16743. Original PR: https://github.com/leanprover-community/mathlib4/pull/16743 --- - [x] depends on: #28352 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-analysis new-contributor 269/157 Mathlib.lean,Mathlib/Analysis/Calculus/Implicit.lean,Mathlib/Analysis/Calculus/ImplicitContDiff.lean,Mathlib/Analysis/Calculus/ImplicitFunction/ProdDomain.lean 4 27 ['agjftucker', 'github-actions', 'j-loreaux', 'mathlib-bors', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot', 'winstonyin'] hrmacbeth
assignee:hrmacbeth
 1
34-80611
1 month ago
34-80611
34 days ago
103-12618
103 days
32744 NoneMore
author:NoneMore
 feat(ModelTheory/Definablity): add `DefinableFun` definition and lemmas This PR adds two basic shapes of definable sets and `DefinableFun` definition with relevant lemmas. The main result is `Set.Definable.preimage_of_map` asserting that the preimage of a definable set under a definable map is definable. There are also some tool lemmas derived by the preimage lemma. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor t-logic 147/0 Mathlib/ModelTheory/Definability.lean 1 59 ['NoneMore', 'github-actions', 'mathlib4-merge-conflict-bot', 'staroperator'] awainverse
assignee:awainverse
 1
34-74647
1 month ago
66-84367
66 days ago
94-36586
94 days
34481 DAE123456
author:DAE123456
 feat: Ore's Theorem Ore Theorem : Let G be a graph of order n ≥ 3 that satisfies the Ore property. Then G has a Hamilton cycle. t-combinatorics new-contributor 3372/0 Mathlib.lean,Mathlib/Combinatorics/SimpleGraph/Ore.lean 2 25 ['DAE123456', 'LLaurance', 'Ruben-VandeVelde', 'YaelDillies', 'github-actions', 'kim-em', 'tb65536', 'vlad902'] b-mehta
assignee:b-mehta
 none
34-18598
1 month ago
42-73613
42 days ago
46-38682
46 days
34722 GrigorenkoPV
author:GrigorenkoPV
 feat(Data/Finset/RangeDistance): add --- 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 34/0 Mathlib.lean,Mathlib/Algebra/Order/Group/Unbundled/Abs.lean,Mathlib/Data/Finset/RangeDistance.lean 3 4 ['GrigorenkoPV', 'github-actions', 'joneugster', 'plp127'] TwoFX
assignee:TwoFX
 none
34-18594
1 month ago
42-59405
42 days ago
42-61265
42 days
34809 YaelDillies
author:YaelDillies
 feat: induced subgraphs of complete multipartite graphs are complete multipartite From ProofBench --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-combinatorics 4/2 Mathlib/Combinatorics/SimpleGraph/CompleteMultipartite.lean 1 1 ['github-actions'] b-mehta
assignee:b-mehta
 none
34-18590
1 month ago
41-33403
41 days ago
41-33358
41 days
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 submersions. t-differential-geometry new-contributor 596/0 Mathlib.lean,Mathlib/Geometry/Manifold/Submersion.lean 2 2 ['github-actions'] grunweg
assignee:grunweg
 none
33-55014
1 month ago
33-56788
33 days ago
33-58158
33 days
34994 bwangpj
author:bwangpj
 feat: Countable.of_module_finite --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra large-import FLT
label:t-algebra$
 7/0 Mathlib/LinearAlgebra/Countable.lean 1 3 ['bwangpj', 'eric-wieser', 'github-actions'] eric-wieser
assignee:eric-wieser
 none
33-11993
1 month ago
36-36856
36 days ago
36-36811
36 days
32807 WilliamCoram
author:WilliamCoram
 feat: Define the Gauss norm for MvPowerSeries We adjust the current definition for Gauss norm on power series to work for multivariate power series. If this seems acceptable I can refactor the single variable case. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-ring-theory new-contributor 124/0 Mathlib.lean,Mathlib/RingTheory/MvPowerSeries/GaussNorm.lean 2 25 ['WilliamCoram', 'erdOne', 'fbarroero', 'github-actions', 'mathlib4-merge-conflict-bot', 'vihdzp'] alreadydone
assignee:alreadydone
 none
31-59032
1 month ago
31-59098
31 days ago
44-66915
44 days
31560 AntoineChambert-Loir
author:AntoineChambert-Loir
 feat(Topology/Sion): the minimax theorem of von Neumann - Sion Prove `Sion.exists_isSaddlePointOn` : Let X and Y be convex subsets of topological vector spaces E and F, X being moreover compact, and let f : X × Y → ℝ be a function such that - for all x, f(x, ⬝) is upper semicontinuous and quasiconcave - for all y, f(⬝, y) is lower semicontinuous and quasiconvex Then inf_x sup_y f(x,y) = sup_y inf_x f(x,y). The classical case of the theorem assumes that f is continuous, f(x, ⬝) is concave, f(⬝, y) is convex. As a particular case, one get the von Neumann theorem where f is bilinear and E, F are finite dimensional. We follow the proof of Komiya (1988). ## Remark on implementation * The essential part of the proof holds for a function `f : X → Y → β`, where `β` is a complete dense linear order. * We have written part of it for just a dense linear order, * On the other hand, if the theorem holds for such `β`, it must hold for any linear order, for the reason that any linear order embeds into a complete dense linear order. However, this result does not seem to be known to Mathlib. * When `β` is `ℝ`, one can use `Real.toEReal` and one gets a proof for `ℝ`. ## TODO Give particular important cases (eg, bilinear maps in finite dimension). Co-authored with @ADedecker --- - [x] depends on: #31548 - [x] depends on: #31547 - [x] depends on: #31558 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-topology 733/0 Mathlib.lean,Mathlib/Data/EReal/Basic.lean,Mathlib/Topology/Semicontinuity/Basic.lean,Mathlib/Topology/Sion.lean,docs/references.bib 5 10 ['AntoineChambert-Loir', 'github-actions', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot', 'riccardobrasca', 'thorimur'] dwrensha and kmill
assignee:kmill assignee:dwrensha
 none
31-31627
1 month ago
31-31627
31 days ago
92-71235
92 days
34069 artie2000
author:artie2000
 feat(Algebra/Order/Algebra): algebra is ordered iff inclusion map is monotone * Prove that an extension of ordered semirings forms an ordered algebra iff the inclusion map is injective * Reorganise section variables for clarity The typeclass `PartialOrder α` in `IsOrderedModule.of_algebraMap_mono` can be generalised to `Preorder α`. This has no mathematical application and all the other lemmas are proved over a partially ordered type, so this generalisation was not made. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra t-order
label:t-algebra$
 18/7 Mathlib/Algebra/Order/Algebra.lean 1 1 ['github-actions'] pechersky
assignee:pechersky
 none
31-25743
1 month ago
57-30279
57 days ago
57-32232
57 days
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 52/1 Mathlib/Data/Finset/Powerset.lean,Mathlib/Data/Fintype/Pi.lean,Mathlib/Logic/Equiv/Fintype.lean 3 25 ['DavidLedvinka', 'b-mehta', 'eric-wieser', 'github-actions', 'joneugster', 'pfaffelh'] pechersky
assignee:pechersky
 none
31-18766
1 month ago
39-22292
39 days ago
42-35673
42 days
34820 staroperator
author:staroperator
 feat(Order/Ideal): more results on order ideals Some iffs, closure of finite supremum, and that every proper ideal is contained in a maximal ideal. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-order large-import 79/5 Mathlib/Order/Ideal.lean 1 5 ['bryangingechen', 'github-actions', 'leanprover-radar', 'staroperator'] pechersky
assignee:pechersky
 none
31-18765
1 month ago
34-23348
34 days ago
40-69233
40 days
30900 vihdzp
author:vihdzp
 feat: run-length encoding --- - [x] depends on: #30898 Moved from #17105. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-data 167/0 Mathlib.lean,Mathlib/Data/List/RunLength.lean,Mathlib/Data/List/SplitBy.lean 3 5 ['github-actions', 'mathlib-dependent-issues', 'mathlib4-merge-conflict-bot', 'plp127'] TwoFX
assignee:TwoFX
 none
30-18759
1 month ago
34-22096
34 days ago
34-22630
34 days
34948 joneugster
author:joneugster
 feat(scripts/autolabel): add option to configure number of applied labels add option to change the maximum number of labels the script can apply simultaneously. This does not change the behaviour of the script. The option remains at `1`, but it prepares for potential future adjustments. factored out from: #34066 --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) CI 13/9 scripts/autolabel.lean 1 2 ['github-actions', 'mathlib-merge-conflicts'] adomani
assignee:adomani
 none
30-18478
1 month ago
30-18498
30 days ago
31-31567
31 days
35152 j-loreaux
author:j-loreaux
 feat: add missing API for `lp E p` The API for `lp` is significantly underdeveloped. This PR attempts to rectify some of the shortcomings. In particular, we provide: + some missing tools for `Memℓp`, notably `memℓp_norm_iff` and `Memℓp.mono`. + some improved docstrings and more uniform notation for the non-dependent case; note that we also *remove* the notation `ℓ^∞(ι)` for `lp (fun _ : ι ↦ ℝ) ∞` on the basis that there are other choices besides `ℝ` which would make at least as much sense here, including `ℂ`. + bundled version of maps (evaluation, inclusion as a linear map, summation in `ℓ¹`) as well as cleaning-up a few other odds and ends. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-analysis 189/26 Mathlib/Analysis/InnerProductSpace/l2Space.lean,Mathlib/Analysis/Normed/Lp/lpSpace.lean,Mathlib/Topology/MetricSpace/Kuratowski.lean 3 1 ['github-actions'] sgouezel
assignee:sgouezel
 none
29-18751
1 month ago
33-28860
33 days ago
33-28815
33 days
35414 joneugster
author:joneugster
 feat(Cache): Allow arguments of the form `Mathlib.Data.+` which correspond to a folder but not a file This PR continues the work from #21838. Original PR: https://github.com/leanprover-community/mathlib4/pull/21838 CI t-meta 74/31 Cache/IO.lean,Cache/Main.lean 2 2 ['github-actions', 'joneugster'] eric-wieser
assignee:eric-wieser
 none
28-47523
1 month ago
28-48347
28 days ago
28-48302
28 days
35413 joneugster
author:joneugster
 fix(Util/CountHeartbeats): move elaboration in #count_heartbeats inside a namespace This PR continues the work from #21182. Original PR: https://github.com/leanprover-community/mathlib4/pull/21182 t-meta 73/6 Mathlib/Util/CountHeartbeats.lean,MathlibTest/CountHeartbeats.lean 2 3 ['github-actions', 'joneugster', 'mathlib-bors'] adomani
assignee:adomani
 none
28-46605
1 month ago
28-48419
28 days ago
28-48374
28 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 43/0 Mathlib/Data/Sym/Sym2.lean 1 7 ['SnirBroshi', 'eric-wieser', 'github-actions'] pechersky
assignee:pechersky
 none
28-38568
1 month ago
38-75777
38 days ago
38-75732
38 days
33275 YuvalFilmus
author:YuvalFilmus
 feat(Trigonometric/Chebyshev/Extremal): Chebyshev polynomials maximize iterated derivatives We prove that Chebyshev polynomials maximized iterated derivatives at points x≥1. --- - [x] depends on: #33259 - [x] depends on: #33274 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-analysis 74/1 Mathlib/Analysis/SpecialFunctions/Trigonometric/Chebyshev/Extremal.lean 1 6 ['github-actions', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] dupuisf
assignee:dupuisf
 none
28-37878
1 month ago
52-67803
52 days ago
52-70089
52 days
31425 robertmaxton42
author:robertmaxton42
 feat(Topology): implement delaborators for non-standard topology notation Add delaborators for unary and binary notation related to non-standard topologies in the TopologicalSpace namespace. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-topology 250/4 Mathlib.lean,Mathlib/Topology/Defs/Basic.lean,Mathlib/Util/DelabNonCanonical.lean,MathlibTest/Delab/TopologicalSpace.lean 4 45 ['eric-wieser', 'github-actions', 'jcommelin', 'kckennylau', 'robertmaxton42'] eric-wieser
assignee:eric-wieser
 none
27-53800
27 days ago
59-20969
59 days ago
112-82831
112 days
34851 dennj
author:dennj
 feat(Data/Matrix/Mul): add diagonal and transpose lemmas for vector operations This adds three lemmas for matrix-vector operations that serve as foundational support for future ML formalization: - `vecMul_diagonal_dotProduct`: weighted inner product `x ᵥ* diagonal d ⬝ᵥ y = ∑ i, d i * x i * y i` - `dotProduct_transpose_mulVec`: bilinear form symmetry `x ⬝ᵥ Aᵀ *ᵥ y = y ⬝ᵥ A *ᵥ x` - `mul_diagonal_mulVec`: column-weighted sum `(A * diagonal d) *ᵥ x = ∑ i, (d i * x i) • A.col i` These are basic linear algebra identities involving diagonal matrices and vector operations that appear frequently in machine learning contexts (weighted inner products, attention mechanisms, feature scaling, diagonal preconditioning). t-data new-contributor 22/0 Mathlib/Data/Matrix/Mul.lean 1 5 ['dennj', 'eric-wieser', 'github-actions', 'themathqueen'] pechersky
assignee:pechersky
 none
27-24776
27 days ago
40-34252
40 days ago
40-34207
40 days
28546 Sfgangloff
author:Sfgangloff
 feat(SymbolicDynamics): basic setup of Zd, full shift, cylinders, pat… This PR adds a **group-generic** foundation for symbolic dynamics over an arbitrary group `G`, together with convenient specializations for `ℤ` and `ℤ^d`. Summary of additions: - **Full shift and shift action** - `abbrev FullShift (A G) := G → A` (inherits product topology from the Π-type). - Right shift `shift g x` with convention `(shift g x) h = x (h * g)`. - **Cylinders and topology** - `cylinder U x : Set (G → A)` for finite `U : Finset G`. - Cylinders are open under `[DiscreteTopology A]`; with a finite alphabet they are also closed. - Equality with dependent products: `cylinder U x = Set.pi (↑U) (fun i => ({x i} : Set A))`, enabling use of the `Set.pi` API. - **Patterns, occurrences, and subshifts** - `Pattern A G` with finite `support : Finset G` and `data : support → A`. - `Pattern.occursIn p x g` (occurrence at translate `g`) and the expected shift law. - `forbids F` and `Subshift A G` (closed, shift-invariant subsets). - `FixedSupport A G U` with an equivalence to `(U → A)` to obtain finiteness. - **Language on finite shapes and counting** - `languageOn X U`, `languageCardOn X U`, and `patternCountOn Y U`. - **Entropy along a shape sequence** - `limsupAtTop` (as an `sInf` of eventual upper bounds). - `entropyAlong X F hF := limsup (log (patternCountOn X (F n) + 1) / |F n|)` for any nonempty finite shapes `F : ℕ → Finset G` (the `+ 1` avoids `log 0`). - **Specializations** - `IntShapes`: segments `[-n,n]` on `Multiplicative ℤ`, with `entropy_Z`. - `ZdShapes`: boxes `[-n,n]^d` on `ℤ^d` (as functions `Fin d → ℤ`), with `entropy_Zd`. Mathematical remarks: - The API is **shape-parametric**: entropy is defined along user-provided finite shapes. - On **amenable** groups, using a **Følner** sequence yields a canonical value (Ornstein–Weiss). This PR does not assume amenability; the family of shapes is an explicit input. Motivation: Provide a clean, reusable base for symbolic dynamics on groups in mathlib. Future work: - Add a Følner predicate and prove shape-independence / limit existence on amenable groups. - Expand the `ℤ`/`ℤ^d` toolkit (alternative shapes, mixing, factors). - Develop 1D theory and, longer-term, multidimensional SFT results (e.g. along the lines of Hochman–Meyerovitch). t-dynamics new-contributor 746/0 Mathlib.lean,Mathlib/Dynamics/SymbolicDynamics/Basic.lean,Mathlib/Tactic/Translate/ToAdditive.lean 3 180 ['Sfgangloff', 'botbaki-review', 'eric-wieser', 'github-actions', 'kckennylau', 'mathlib4-merge-conflict-bot', 'sgouezel'] sgouezel
assignee:sgouezel
 none
27-20245
27 days ago
28-19543
28 days ago
131-65368
131 days
33252 SnirBroshi
author:SnirBroshi
 chore(Combinatorics/SimpleGraph/Coloring): use `IsIndepSet` instead of `IsAntichain` to spell "a color class is an independent set" --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-combinatorics 6/2 Mathlib/Combinatorics/SimpleGraph/Coloring.lean,Mathlib/Combinatorics/SimpleGraph/Partition.lean 2 1 ['github-actions'] b-mehta
assignee:b-mehta
 none
26-18763
26 days ago
38-22549
38 days ago
50-62239
50 days
34193 bwangpj
author:bwangpj
 feat(Topology/Algebra/Ring): ContinuousAddEquiv.mulLeft, mulRight The additive homeomorphism from a topological ring to itself, induced by left/right multiplication by a unit. From FLT. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-topology FLT maintainer-merge 25/0 Mathlib/Topology/Algebra/Ring/Basic.lean 1 10 ['bwangpj', 'dagurtomas', 'eric-wieser', 'github-actions', 'riccardobrasca'] dagurtomas
assignee:dagurtomas
 none
25-80613
25 days ago
54-75512
54 days ago
54-82734
54 days
33292 SnirBroshi
author:SnirBroshi
 feat(Combinatorics/SimpleGraph/LineGraph): lift copies/isomorphisms to line-graph Non-injective homomorphisms (`G →g G'`) cannot be lifted to a homomorphism on line-graphs (`G.lineGraph →g G'.lineGraph`) because e.g. `∀ k > 1` there is a homomorphism from `pathGraph k` to `G'` iff `G'` has an edge, and `∀ n > 0, (pathGraph (n + 1)).lineGraph ≃ pathGraph n`, but there is no homomorphism from `pathGraph k` to `pathGraph 1` because it has no edges. So for `G := pathGraph 3` and `G' := pathGraph 2` there is a `G →g G'` but no `G.lineGraph →g G'.lineGraph`. But we can lift `Copy`/`Embedding`/`Iso`. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) large-import t-combinatorics 45/4 Mathlib/Combinatorics/SimpleGraph/LineGraph.lean,Mathlib/Data/Sym/Sym2.lean 2 6 ['SnirBroshi', 'github-actions', 'tb65536'] b-mehta
assignee:b-mehta
 none
24-11106
24 days ago
24-12460
24 days ago
77-72561
77 days
34315 LessnessRandomness
author:LessnessRandomness
 feat(Combinatorics/SimpleGraph/Bipartite): Prove upper bound of edge set cardinality of bipartite graph Two ways to express upper bound of the edge set of bipartite graph: 1) If the cardinalities of both parts/sets, that make bipartite graph, are known, then the upper bound is equal to product of the cardinalities of both parts; 2) Four times of the cardinality of the edge set is less or equal to squared cardinality of vertex set. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-combinatorics 53/0 Mathlib/Combinatorics/SimpleGraph/Bipartite.lean 1 55 ['LessnessRandomness', 'SnirBroshi', 'b-mehta', 'github-actions', 'vlad902'] awainverse
assignee:awainverse
 1
23-60714
23 days ago
23-61546
23 days ago
47-69695
47 days
34144 IvanRenison
author:IvanRenison
 feat(Data/ENat): add lemma `ENat.iInf_eq_coe_iff` Co-authored-by: SnirBroshi <26556598+SnirBroshi@users.noreply.github.com> --- [Zulip thread](https://leanprover.zulipchat.com/#narrow/channel/217875-Is-there-code-for-X.3F/topic/ENat.2EiInf_eq_nat_iff/with/568699219) [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-data 21/0 Mathlib/Data/ENat/Lattice.lean,Mathlib/Order/ConditionallyCompleteLattice/Basic.lean,Mathlib/Order/ConditionallyCompleteLattice/Indexed.lean 3 16 ['IvanRenison', 'Ruben-VandeVelde', 'SnirBroshi', 'eric-wieser', 'github-actions', 'tb65536'] TwoFX
assignee:TwoFX
 none
23-35811
23 days ago
23-35848
23 days ago
51-58586
51 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 164/8 Mathlib/Combinatorics/SimpleGraph/Bipartite.lean,Mathlib/Combinatorics/SimpleGraph/ConcreteColorings.lean 2 70 ['IvanRenison', 'NickAdfor', 'Rida-Hamadani', 'SnirBroshi', 'github-actions', 'kmill', 'mitchell-horner', 'vihdzp', 'vlad902'] kmill
assignee:kmill
 none
21-18770
21 days ago
37-17704
37 days ago
45-25605
45 days
30982 jsm28
author:jsm28
 feat(Geometry/Euclidean/Angle/Incenter): angle bisection and the incenter Add lemmas relating the incenter and excenters of a simplex to angle bisection, both generally for a simplex and more specifically with oriented angles for a triangle. More specific lemmas for a simplex (identifying exactly which excenter corresponds to which bisectors) will require various additional API for bisectors of angles betweeen oriented affine subspaces (but for the most common applications to typical plane geometry problems, I expect the triangle lemmas with oriented angles to be more useful). --- - [ ] depends on: #30474 - [ ] depends on: #30477 - [ ] depends on: #30600 - [ ] depends on: #30703 - [ ] depends on: #30938 - [ ] depends on: #30981 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-euclidean-geometry 269/0 Mathlib.lean,Mathlib/Geometry/Euclidean/Angle/Incenter.lean 2 6 ['Parcly-Taxel', 'github-actions', 'jsm28', 'mathlib-dependent-issues', 'mathlib4-merge-conflict-bot', 'wwylele'] JovanGerb
assignee:JovanGerb
 2
21-17090
21 days ago
34-58778
34 days ago
34-61211
34 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 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor large-import t-order 191/1 Mathlib/Data/Sum/Basic.lean,Mathlib/Data/Sum/Order.lean,Mathlib/Order/OmegaCompletePartialOrder.lean,Mathlib/Order/ScottContinuity.lean 4 20 ['Vierkantor', 'YellPika', 'github-actions', 'mathlib-dependent-issues', 'mathlib-merge-conflicts', 'vihdzp'] bryangingechen
assignee:bryangingechen
 none
20-18750
20 days ago
31-46913
31 days ago
41-9120
41 days
35273 grunweg
author:grunweg
 chore: replace `continuity` -> `fun_prop` in remaining auto-parameters Resurrected version of #13994. Let's look at the current fall-out and performance effect. --- - [x] depends on: #35278 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-topology 23/16 Mathlib/Analysis/Convex/PathConnected.lean,Mathlib/Analysis/LocallyConvex/WeakSpace.lean,Mathlib/Analysis/SpecialFunctions/Arcosh.lean,Mathlib/Topology/Algebra/Algebra.lean,Mathlib/Topology/Algebra/Category/ProfiniteGrp/Basic.lean,Mathlib/Topology/Algebra/ContinuousMonoidHom.lean,Mathlib/Topology/Algebra/Module/Equiv.lean,Mathlib/Topology/Algebra/Module/LinearMap.lean,Mathlib/Topology/Algebra/SeparationQuotient/Basic.lean,Mathlib/Topology/Category/TopCat/Limits/Products.lean,Mathlib/Topology/Category/TopCat/ULift.lean,Mathlib/Topology/ContinuousMap/Basic.lean,Mathlib/Topology/ContinuousMap/Defs.lean,Mathlib/Topology/FiberPartition.lean 14 4 ['github-actions', 'grunweg', 'leanprover-radar', 'mathlib-dependent-issues'] urkud
assignee:urkud
 none
20-18745
20 days ago
26-75083
26 days ago
27-2130
27 days
35565 felixpernegger
author:felixpernegger
 feat(Topology): sequentially T2 spaces Adds typeclass for topoligcal spaces where convergent sequences have a unique limit. This lies between T2 and T1 and is occassionally useful when T2 is not strictly required. An example of a non T2 space with unique limit is the one point compactification of Q. There are some more implications not in this PR, see https://topology.pi-base.org/properties/P000099 In particular, (countably) compact sets are closed in sequentially T2 spaces. t-topology 135/0 Mathlib.lean,Mathlib/Topology/SequentiallyHausdorff.lean 2 1 ['github-actions'] urkud
assignee:urkud
 none
20-18740
20 days ago
24-65438
24 days ago
24-65937
24 days
34154 euprunin
author:euprunin
 chore: golf using `grind` (and add four supporting `grind` annotations) The goal of this golfing PR is to decrease the number of times lemmas are called explicitly (replacing calls to lemmas with calls to tactics). Any decrease in compilation time is a welcome side effect, although it is not a primary objective. Trace profiling results (shown if ≥10 ms before or after): * `Orientation.nonneg_inner_and_areaForm_eq_zero_iff_sameRay`: 311 ms before, 284 ms after 🎉 * `UV.compression_self`: 29 ms before, 19 ms after 🎉 * `IsSepClosed.exists_root_C_mul_X_pow_add_C_mul_X_add_C`: 405 ms before, 291 ms after 🎉 * `InnerProductGeometry.norm_add_eq_add_norm_iff_angle_eq_zero`: 425 ms before, 309 ms after 🎉 This golfing PR is batched under the following guidelines: * Up to ~5 changed files per PR * Up to ~25 changed declarations per PR * Up to ~100 changed lines per PR --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) 9/30 Mathlib/Algebra/Polynomial/Degree/Defs.lean,Mathlib/Algebra/Polynomial/Degree/Operations.lean,Mathlib/Analysis/InnerProductSpace/TwoDim.lean,Mathlib/Combinatorics/SetFamily/Compression/UV.lean,Mathlib/FieldTheory/IsSepClosed.lean,Mathlib/Geometry/Euclidean/Angle/Unoriented/Basic.lean 6 13 ['Parcly-Taxel', 'euprunin', 'github-actions', 'leanprover-radar', 'mathlib-merge-conflicts', 'mathlib4-merge-conflict-bot', 'tb65536'] kim-em
assignee:kim-em
 none
19-45103
19 days ago
19-65900
19 days ago
47-78612
47 days
35402 samueloettl
author:samueloettl
 feat(Dynamics/BirkhoffSum): birkhoffAverage const --- I think this might be useful. My feeling tells me that 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 22/0 Mathlib/Dynamics/BirkhoffSum/Average.lean 1 2 ['github-actions'] urkud
assignee:urkud
 none
19-18772
19 days ago
22-28446
22 days ago
28-61689
28 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
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 32 ['alreadydone', 'artie2000', 'astrainfinita', 'erdOne', 'github-actions', 'leanprover-bot', 'leanprover-radar', 'mathlib4-merge-conflict-bot'] alreadydone
assignee:alreadydone
 none
19-7661
19 days ago
19-12057
19 days ago
47-71970
47 days
35365 wwylele
author:wwylele
 feat(LinearAlgebra/Simplex): closedInterior = interior + face.closedInterior Intermediate lemma towards #34826. This will be used to show the measure on `interior` and `closedInterior` are equal, as the difference is a zero-measure set. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra
label:t-algebra$
 53/0 Mathlib/LinearAlgebra/AffineSpace/Simplex/Basic.lean 1 4 ['copilot-pull-request-reviewer', 'github-actions'] kim-em
assignee:kim-em
 none
18-54763
18 days ago
18-54742
18 days ago
29-49842
29 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 `Continous.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 53/31 Mathlib/Tactic/FunProp/Core.lean,Mathlib/Tactic/FunProp/FunctionData.lean,Mathlib/Tactic/FunProp/Theorems.lean,MathlibTest/fun_prop_dev.lean 4 1 ['github-actions'] JovanGerb
assignee:JovanGerb
 none
18-18775
18 days ago
21-32866
21 days ago
21-32821
21 days
33458 NoneMore
author:NoneMore
 feat(ModelTheory): add lifting for embeddings to languages with constants Prepare for a generalized Tarski-Vaught test with a set as input instead of a substructure. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-logic new-contributor 46/0 Mathlib/ModelTheory/ElementaryMaps.lean,Mathlib/ModelTheory/LanguageMap.lean 2 7 ['Citronhat', 'NoneMore', 'fpvandoorn', 'github-actions'] fpvandoorn
assignee:fpvandoorn
 none
17-59921
17 days ago
17-60139
17 days ago
73-72673
73 days
34583 adomani
author:adomani
 feat: basic properties of subnormal subgroups This is a follow up to #34284. Co-authored-by: Inna Capdeboscq --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) large-import t-group-theory 107/3 Mathlib/Algebra/Group/Conj.lean,Mathlib/Algebra/Group/Subgroup/Pointwise.lean,Mathlib/GroupTheory/IsSubnormal.lean 3 38 ['LLaurance', 'adomani', 'github-actions', 'tb65536'] mattrobball
assignee:mattrobball
 1
17-52027
17 days ago
17-51838
17 days ago
33-46995
33 days
35653 pepamontero
author:pepamontero
 feat: add ChartedSpace structure on orbit space feat: add ChartedSpace structure on orbit space Add topological preliminaries for properly discontinuous group actions, and use them to equip the orbit space `orbitRel.Quotient G M` with a `ChartedSpace` structure. In particular: - Show that the quotient map `Quotient.mk _ : M → orbitRel.Quotient G M` is a covering map and hence a local homeomorphism. - Construct chosen local inverses of the quotient map and establish properties over them. - Define a `ChartedSpace` instance on the quotient by composing these local inverses with charts of M. This started as an ItaLean2025 project; here is the [Zulip thread](https://leanprover.zulipchat.com/#narrow/channel/541885-ItaLean-2025/topic/Projects.3A.20Quotient.20Manifolds/with/575121158) dedicated to it. --- new-contributor t-differential-geometry 186/0 Mathlib.lean,Mathlib/Geometry/Manifold/Instances/OrbitSpace.lean,Mathlib/Topology/Algebra/OrbitSpace.lean 3 2 ['github-actions'] grunweg
assignee:grunweg
 none
17-50070
17 days ago
22-37815
22 days ago
22-38445
22 days
35250 vlad902
author:vlad902
 feat(SimpleGraph): redefine `cycleGraph` independent of `circulantGraph` Right now the `cycleGraph` definition relies on `circulantGraph` which requires importing Group definitions from the algebra hierarchy. This causes large-imports for me in later PRs where I try to make more widespread use of cycleGraphs, so here I redefine it to be its own independent object, and leave moving it from `Circulant.lean` to another PR (this is parallel to #35084.) --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-combinatorics 10/10 Mathlib/Combinatorics/SimpleGraph/Circulant.lean 1 4 ['SnirBroshi', 'github-actions', 'vihdzp', 'vlad902'] kmill
assignee:kmill
 2
17-18796
17 days ago
31-61089
31 days ago
31-61044
31 days
35592 SnirBroshi
author:SnirBroshi
 chore(Order/Defs/Unbundled): deprecate `def Transitive` in favor of `class IsTrans` --- [`def Transitive`](https://leanprover-community.github.io/mathlib4_docs/Mathlib/Order/Defs/Unbundled.html#Transitive) [`class IsTrans`](https://leanprover-community.github.io/mathlib4_docs/Mathlib/Order/Defs/Unbundled.html#IsTrans) [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 141/110 Mathlib/Algebra/Group/Semiconj/Defs.lean,Mathlib/CategoryTheory/Abelian/Pseudoelements.lean,Mathlib/CategoryTheory/IsConnected.lean,Mathlib/Combinatorics/SimpleGraph/CompleteMultipartite.lean,Mathlib/Combinatorics/SimpleGraph/FiveWheelLike.lean,Mathlib/Computability/Reduce.lean,Mathlib/Data/List/MinMax.lean,Mathlib/Data/Seq/Computation.lean,Mathlib/Data/WSeq/Relation.lean,Mathlib/GroupTheory/FreeGroup/Basic.lean,Mathlib/LinearAlgebra/LinearIndependent/Lemmas.lean,Mathlib/Logic/Relation.lean,Mathlib/ModelTheory/Order.lean,Mathlib/ModelTheory/Semantics.lean,Mathlib/Order/Defs/Unbundled.lean,Mathlib/Order/Interval/Finset/Basic.lean,Mathlib/Order/Quotient.lean,Mathlib/Order/RelClasses.lean,Mathlib/Topology/Connected/Clopen.lean,Mathlib/Topology/Metrizable/Uniformity.lean 20 1 ['github-actions', 'vihdzp'] pechersky
assignee:pechersky
 1
17-18792
17 days ago
24-13738
24 days ago
24-15305
24 days
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 3 ['github-actions', 'wwylele'] TwoFX
assignee:TwoFX
 none
17-18790
17 days ago
22-68695
22 days ago
22-83156
22 days
34423 euprunin
author:euprunin
 chore: golf using `grind` The goal of this golfing PR is to decrease the number of times lemmas are called explicitly (replacing calls to lemmas with calls to tactics). Any decrease in compilation time is a welcome side effect, although it is not a primary objective. Trace profiling results (shown if ≥10 ms before or after): * `LucasLehmer.norm_num_ext.sModNat_eq_sMod`: 950 ms before, 758 ms after 🎉 This golfing PR is batched under the following guidelines: * Up to ~5 changed files per PR * Up to ~25 changed declarations per PR * Up to ~100 changed lines per PR --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) 1/18 Mathlib/NumberTheory/LucasLehmer.lean 1 14 ['eric-wieser', 'euprunin', 'github-actions', 'leanprover-radar', 'robin-carlier'] eric-wieser
assignee:eric-wieser
 none
16-73080
16 days ago
16-73080
16 days ago
49-53331
49 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
label:t-algebra$
 610/0 Archive.lean,Archive/Robbins.lean 2 1 ['github-actions'] dwrensha
assignee:dwrensha
 none
16-46591
16 days ago
37-11342
37 days ago
37-12949
37 days
34477 spanning-tree
author:spanning-tree
 refactor(Order): make CompletePartialOrder extend OrderBot Make `CompletePartialOrder` extend `OrderBot`, and add a constructor `completePartialOrderOfLubOfDirected`. Previously, `CompletePartialOrder` had an implicit bottom element but did not extend OrderBot explicitly. Breaking change: `CompletePartialOrder` instances must provide `⊥` and `bot_le`, or use the constructor. See discussion in [Zulip](https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/.3E.20complete.20partial.20order.20and.20domain.20theory.20formalization). --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-order new-contributor 15/1 Mathlib/Order/CompletePartialOrder.lean 1 3 ['Citronhat', 'github-actions', 'mathlib-merge-conflicts'] pechersky
assignee:pechersky
 none
15-58063
15 days ago
15-58086
15 days ago
36-33198
36 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 680/0 Mathlib.lean,Mathlib/Geometry/Manifold/ExistsRiemannianMetric.lean,Mathlib/Geometry/Manifold/PartitionOfUnity.lean 3 200 ['github-actions', 'grunweg', 'idontgetoutmuch'] grunweg
assignee:grunweg
 none
15-51221
15 days ago
15-51247
15 days ago
29-81377
29 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 t-algebra new-contributor
label:t-algebra$
 135/0 Mathlib.lean,Mathlib/LinearAlgebra/Matrix/ShermanMorrison.lean 2 11 ['Xxxjdjdid', 'banrovegrie', 'copilot-pull-request-reviewer', 'eric-wieser', 'github-actions', 'wwylele'] kim-em
assignee:kim-em
 1
15-49667
15 days ago
39-53484
39 days ago
39-53439
39 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 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 45 ['JovanGerb', 'PatrickMassot', 'Vierkantor', 'github-actions', 'hrmacbeth', 'kim-em', 'mathlib4-merge-conflict-bot'] JovanGerb
assignee:JovanGerb
 none
15-38945
15 days ago
15-38945
15 days ago
64-33604
64 days
31891 jsm28
author:jsm28
 feat(Geometry/Euclidean/Sphere/OrthRadius): lemmas for setting up and using polars Add further lemmas about `orthRadius` that are of use in setting up and using poles and polars. In particular, `ncard_inter_orthRadius_eq_two_of_dist_lt_radius` is the key part of showing that, in two dimensions, there are exactly two tangents to a circle from a point outside that circle (where the points of tangency lie on the polar of the point from which the two tangents are drawn). --- Feel free to golf the proof of `ncard_inter_orthRadius_eq_two_of_dist_lt_radius`, it could probably be rather shorter. --- - [ ] depends on: #32296 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-euclidean-geometry 265/7 Mathlib/Geometry/Euclidean/Sphere/OrthRadius.lean,Mathlib/Geometry/Euclidean/Sphere/Tangent.lean 2 28 ['Parcly-Taxel', 'eric-wieser', 'github-actions', 'jsm28', 'mathlib-merge-conflicts', 'mathlib4-dependent-issues-bot'] JovanGerb
assignee:JovanGerb
 1
15-18615
15 days ago
26-61513
26 days ago
114-82695
114 days
34758 Hagb
author:Hagb
 feat(RingTheory/MvPolynomial/MonomialOrder): misc lemmas --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-ring-theory 52/2 Mathlib/RingTheory/MvPolynomial/MonomialOrder.lean 1 7 ['Hagb', 'erdOne', 'github-actions'] mattrobball
assignee:mattrobball
 none
14-76254
14 days ago
14-76310
14 days ago
33-50120
33 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 10/0 Mathlib/NumberTheory/Divisors.lean 1 5 ['adrianmartir', 'alexjbest', 'github-actions'] alexjbest
assignee:alexjbest
 none
14-73570
14 days ago
18-71572
18 days ago
18-71563
18 days
35786 DavidLedvinka
author:DavidLedvinka
 feat(Order): Add simp lemma for `IsRelUpperSet` and `IsRelLowerSet` This is useful in scenarios when `simp` can simplify the relation to true. t-order 8/0 Mathlib/Order/UpperLower/Relative.lean 1 3 ['DavidLedvinka', 'eric-wieser', 'github-actions'] bryangingechen
assignee:bryangingechen
 none
14-18755
14 days ago
19-23944
19 days ago
19-23899
19 days
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 74/0 Mathlib.lean,Mathlib/Algebra/GradedMonoid.lean,Mathlib/RingTheory/GradedAlgebra/Homogeneous/Hom.lean 3 2 ['github-actions', 'joneugster'] mattrobball
assignee:mattrobball
 none
14-18750
14 days ago
18-23322
18 days ago
18-23901
18 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
195-22678
6 months ago
203-60232
203 days ago
0-19882
5 hours
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
50-19483
1 month ago
50-24863
50 days ago
5-82220
5 days
33664 ooovi
author:ooovi
 feat(Geometry/Convex/Cone/Pointed): face lattice of pointed cones - Create a subdirectory in `Cone` for pointed cones and move existing files there. - 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 --- - [ ] depends on: #33780 for the definition of the lineal space [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) file-removed awaiting-author t-convex-geometry merge-conflict blocked-by-other-PR 541/10 Mathlib.lean,Mathlib/Analysis/Convex/Cone/Basic.lean,Mathlib/Analysis/Convex/Cone/Closure.lean,Mathlib/Analysis/Convex/Cone/Dual.lean,Mathlib/Geometry/Convex/Cone/Pointed/Basic.lean,Mathlib/Geometry/Convex/Cone/Pointed/Dual.lean,Mathlib/Geometry/Convex/Cone/Pointed/Face/Basic.lean,Mathlib/Geometry/Convex/Cone/Pointed/Face/Lattice.lean,Mathlib/Geometry/Convex/Cone/Pointed/TensorProduct.lean 9 87 ['YaelDillies', 'eric-wieser', 'github-actions', 'martinwintermath', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot', 'ooovi'] nobody
27-49539
27 days ago
69-59795
69 days ago
0-8346
2 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 t-algebra new-contributor
label:t-algebra$
 135/0 Mathlib.lean,Mathlib/LinearAlgebra/Matrix/ShermanMorrison.lean 2 11 ['Xxxjdjdid', 'banrovegrie', 'copilot-pull-request-reviewer', 'eric-wieser', 'github-actions', 'wwylele'] kim-em
assignee:kim-em
15-49667
15 days ago
39-53484
39 days ago
39-53439
39 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 181/2 Mathlib/AlgebraicTopology/SimplexCategory/GeneratorsRelations/NormalForms.lean 1 6 ['github-actions', 'joelriou', 'mathlib-bors', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
14-50096
14 days ago
147-49823
147 days ago
0-22513
6 hours
35576 Tehlikeli107
author:Tehlikeli107
 ⚡ [performance] Pre-compile regexes in lake-build-wrapper.py - Pre-compile `file_info_re` and `progress_re` in `BuildOutputProcessor.__init__` to avoid repeated compilation overhead. - Replace `re.sub(r'\.', '/', target)` with `target.replace('.', '/')` for better performance when converting module names to file paths. These changes result in a measured ~40% performance improvement in the core processing logic of the wrapper script. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) file-removed awaiting-author CI new-contributor merge-conflict 8/707 scripts/bench/README.md,scripts/bench/build/README.md,scripts/bench/build/fake-root/bin/lean,scripts/bench/build/fake-root/bin/lean.py,scripts/bench/build/lakeprof_report_template.html,scripts/bench/build/lakeprof_report_upload.py,scripts/bench/build/run,scripts/bench/combine.py,scripts/bench/lint/README.md,scripts/bench/lint/run,scripts/bench/measure.py,scripts/bench/open-mathlib/README.md,scripts/bench/open-mathlib/run,scripts/bench/repeatedly.py,scripts/bench/run,scripts/bench/size/README.md,scripts/bench/size/run,scripts/bench/size/run.py,scripts/lake-build-wrapper.py 19 7 ['bryangingechen', 'felixpernegger', 'github-actions', 'grunweg', 'mathlib-merge-conflicts'] nobody
13-74798
13 days ago
24-41071
24 days ago
0-8924
2 hours
34245 staroperator
author:staroperator
 feat(Data/Set): add `Set.Uncountable` There are `Set` specialized shortcuts `Set.Finite`, `Set.Infinite` and `Set.Countable`, but lacking `Set.Uncountable`. I find this useful in #34246. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-data awaiting-zulip 82/4 Mathlib/Analysis/Real/Cardinality.lean,Mathlib/Data/Set/Countable.lean,Mathlib/SetTheory/Cardinal/Basic.lean 3 17 ['github-actions', 'joneugster', 'staroperator', 'vihdzp'] joneugster
assignee:joneugster
10-72764
10 days ago
41-46011
41 days ago
12-21154
12 days
35436 daniel-carranza
author:daniel-carranza
 feat(CategoryTheory/Monoidal/Closed): Prove the isomorphism of internal hom objects C(x \otimes y, z) and C(y, C(x, z)) Prove the currying-uncurrying isomorphism `C(x \otimes y, z) \iso C(y, C(x, z))` between internal hom objects of a closed monoidal category `C`. --- This result is connected to the infinity-cosmos project, and is used to prove that a closed monoidal category enriched in itself admits all cotensors. ~Line 81 currently contains a one-line proof in tactics mode `exact rfl`. When trying to use `rfl` outside of tactics mode, an error is thrown~ (Fixed, thank you @robin-carlier!). Any help with this (or any other aspect of the formalization) is greatly appreciated! [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor t-category-theory infinity-cosmos delegated 89/0 Mathlib.lean,Mathlib/CategoryTheory/Monoidal/Closed/InternalCurrying.lean 2 15 ['dagurtomas', 'daniel-carranza', 'github-actions', 'joelriou', 'mathlib-bors', 'riccardobrasca', 'robin-carlier'] adamtopaz
assignee:adamtopaz
10-40652
10 days ago
18-28791
18 days ago
7-67484
7 days
36416 j-loreaux
author:j-loreaux
 feat(Analysis/CStarAlgebra): norms of sums of orthogonal selfadjoint elements --- - [ ] depends on: #36407 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) blocked-by-other-PR 150/0 Mathlib/Analysis/CStarAlgebra/GelfandDuality.lean,Mathlib/Topology/ContinuousMap/Bounded/Normed.lean,Mathlib/Topology/ContinuousMap/Compact.lean 3 5 ['github-actions', 'mathlib-dependent-issues', 'themathqueen'] nobody
7-32131
7 days ago
7-35587
7 days ago
7-35542
7 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 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 22 ['github-actions', 'mariainesdff', 'mathlib4-merge-conflict-bot'] mariainesdff
assignee:mariainesdff
5-55186
5 days ago
11-45668
11 days ago
28-31300
28 days
36478 TJHeeringa
author:TJHeeringa
 feat(Analysis/Matrix): Added Schur's product Added Schur's product, i.e. the Hadamard product of two finite positive semi-definite matrices is again a positive semi-definite matrix. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-analysis new-contributor awaiting-author 28/0 Mathlib/Analysis/Matrix/Order.lean 1 11 ['github-actions', 'j-loreaux', 'themathqueen'] nobody
5-51265
5 days ago
5-61475
5 days ago
5-61430
5 days
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 blocked-by-other-PR merge-conflict 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/Algebra/Valued/ValuationTopology.lean,Mathlib/Topology/MetricSpace/Algebra.lean,Mathlib/Topology/MetricSpace/BundledFun.lean,Mathlib/Topology/MetricSpace/Infsep.lean,Mathlib/Topology/Semicontinuity/Basic.lean 44 3 ['github-actions', 'mathlib-dependent-issues', 'mathlib-merge-conflicts'] nobody
5-51053
5 days ago
16-84581
16 days ago
0-478
7 minutes
34571 xroblot
author:xroblot
 feat(CyclotomicField/Galois): the bijection between subfields and subgroups of Dirichlet characters This PR adds the first results relating the Galois theory of cyclotomic extensions to Dirichlet characters, following Washington, _Introduction to Cyclotomic Fields_. The main result is the definition of the order-preserving bijection between intermediate fields of `ℚ(ζₙ)/ℚ` and subgroups of the group of Dirichlet characters of level `n`. --- - [x] depends on: #33878 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) large-import t-algebra
label:t-algebra$
 83/1 Mathlib/FieldTheory/Normal/Defs.lean,Mathlib/NumberTheory/NumberField/Cyclotomic/Galois.lean 2 3 ['github-actions', 'mathlib-dependent-issues', 'mathlib-merge-conflicts'] dagurtomas
assignee:dagurtomas
4-18780
4 days ago
7-58154
7 days ago
7-60778
7 days
36515 kim-em
author:kim-em
 experiment: how many `inferInstanceAs` can be replaced with `inferInstanceAs%` (#36420 version) This is a data-gathering follow-up to @JovanGerb's #36420 (second implementation of the `inferInstanceAs%` term elaborator). We replace every `inferInstanceAs` with `inferInstanceAs%` where this does not cause an error. There is no implicit claim that these changes are a good idea. It lets us do three things: * every remaining `inferInstanceAs` will cause an error with `inferInstanceAs%`, and @JovanGerb (or me, or anyone!) mightly usefully investigate these! * I will run `!radar` below to get timing data * I will run `scripts/rm_set_option.py` to see what impact this has on `set_option backward.isDefeqEq.respectTransparency`. WIP merge-conflict 462/358 Counterexamples/HomogeneousPrimeNotPrime.lean,Mathlib/Algebra/Algebra/Subalgebra/Basic.lean,Mathlib/Algebra/Algebra/Subalgebra/Lattice.lean,Mathlib/Algebra/Algebra/ZMod.lean,Mathlib/Algebra/Category/FGModuleCat/EssentiallySmall.lean,Mathlib/Algebra/Category/Grp/FiniteGrp.lean,Mathlib/Algebra/Category/ModuleCat/ExteriorPower.lean,Mathlib/Algebra/Category/ModuleCat/Localization.lean,Mathlib/Algebra/Colimit/Module.lean,Mathlib/Algebra/DirectSum/Basic.lean,Mathlib/Algebra/Field/Subfield/Basic.lean,Mathlib/Algebra/Group/Subgroup/Actions.lean,Mathlib/Algebra/Group/Submonoid/Saturation.lean,Mathlib/Algebra/Homology/DerivedCategory/ExactFunctor.lean,Mathlib/Algebra/Homology/HomotopyCategory/HomComplexCohomology.lean,Mathlib/Algebra/Module/CharacterModule.lean,Mathlib/Algebra/Module/Congruence/Defs.lean,Mathlib/Algebra/Module/LinearMap/Defs.lean,Mathlib/Algebra/Module/LocalizedModule/Basic.lean,Mathlib/Algebra/Module/PUnit.lean,Mathlib/Algebra/Order/Ring/StandardPart.lean,Mathlib/Algebra/Polynomial/Module/Basic.lean,Mathlib/Algebra/Quaternion.lean,Mathlib/Algebra/Ring/Action/Subobjects.lean,Mathlib/Algebra/Ring/Prod.lean,Mathlib/Algebra/Ring/Subring/Basic.lean,Mathlib/Algebra/Star/Prod.lean,Mathlib/Algebra/Star/StarAlgHom.lean,Mathlib/Algebra/Star/Unitary.lean,Mathlib/AlgebraicGeometry/AffineScheme.lean,Mathlib/AlgebraicGeometry/IdealSheaf/Basic.lean,Mathlib/AlgebraicGeometry/Modules/Sheaf.lean,Mathlib/AlgebraicGeometry/Modules/Tilde.lean,Mathlib/AlgebraicGeometry/ResidueField.lean,Mathlib/AlgebraicGeometry/StructureSheaf.lean,Mathlib/AlgebraicTopology/FundamentalGroupoid/FundamentalGroup.lean,Mathlib/AlgebraicTopology/SimplexCategory/Basic.lean,Mathlib/AlgebraicTopology/SimplicialCategory/SimplicialObject.lean,Mathlib/AlgebraicTopology/SimplicialNerve.lean,Mathlib/AlgebraicTopology/SimplicialSet/HoFunctorMonoidal.lean,Mathlib/AlgebraicTopology/SimplicialSet/HomotopyCat.lean,Mathlib/AlgebraicTopology/SimplicialSet/Monoidal.lean,Mathlib/AlgebraicTopology/TopologicalSimplex.lean,Mathlib/Analysis/Normed/Field/Basic.lean,Mathlib/CategoryTheory/Action/Monoidal.lean,Mathlib/CategoryTheory/Monoidal/Cartesian/GrpLimits.lean,Mathlib/CategoryTheory/Monoidal/CommGrp_.lean,Mathlib/CategoryTheory/Monoidal/Grp_.lean,Mathlib/CategoryTheory/Preadditive/Basic.lean,Mathlib/CategoryTheory/Shift/CommShiftTwo.lean,Mathlib/CategoryTheory/Shift/Opposite.lean,Mathlib/CategoryTheory/Sites/Monoidal.lean,Mathlib/CategoryTheory/Triangulated/Opposite/Functor.lean,Mathlib/CategoryTheory/Triangulated/Opposite/OpOp.lean,Mathlib/Combinatorics/SimpleGraph/Circulant.lean,Mathlib/Computability/Encoding.lean,Mathlib/Computability/TuringMachine/Computable.lean,Mathlib/Data/DFinsupp/Module.lean,Mathlib/Data/ENat/Basic.lean,Mathlib/Data/ENat/Lattice.lean,Mathlib/Data/EReal/Basic.lean,Mathlib/Data/EReal/Inv.lean,Mathlib/Data/Matrix/Basic.lean,Mathlib/FieldTheory/Finite/Polynomial.lean,Mathlib/FieldTheory/IntermediateField/Adjoin/Defs.lean,Mathlib/FieldTheory/IntermediateField/Basic.lean,Mathlib/GroupTheory/GroupAction/Defs.lean,Mathlib/GroupTheory/GroupAction/OfQuotient.lean,Mathlib/GroupTheory/SchurZassenhaus.lean,Mathlib/GroupTheory/Submonoid/Inverses.lean,Mathlib/GroupTheory/Torsion.lean,Mathlib/LinearAlgebra/SymmetricAlgebra/Basic.lean,Mathlib/NumberTheory/ArithmeticFunction/Defs.lean,Mathlib/NumberTheory/NumberField/Basic.lean,Mathlib/NumberTheory/Padics/WithVal.lean,Mathlib/NumberTheory/Pell.lean,Mathlib/RingTheory/Congruence/Basic.lean,Mathlib/RingTheory/Congruence/Defs.lean,Mathlib/RingTheory/Etale/Kaehler.lean,Mathlib/RingTheory/Extension/Basic.lean,Mathlib/RingTheory/FreeCommRing.lean,Mathlib/RingTheory/HahnSeries/Multiplication.lean,Mathlib/RingTheory/HopfAlgebra/MonoidAlgebra.lean,Mathlib/RingTheory/Invariant/Basic.lean,Mathlib/RingTheory/IsTensorProduct.lean,Mathlib/RingTheory/MvPowerSeries/Basic.lean,Mathlib/RingTheory/MvPowerSeries/Inverse.lean,Mathlib/RingTheory/NormalClosure.lean,Mathlib/RingTheory/OreLocalization/Basic.lean,Mathlib/RingTheory/OreLocalization/Ring.lean,Mathlib/RingTheory/PiTensorProduct.lean,Mathlib/RingTheory/Smooth/Kaehler.lean,Mathlib/RingTheory/Unramified/LocalRing.lean,Mathlib/RingTheory/Valuation/Archimedean.lean,Mathlib/RingTheory/Valuation/Basic.lean,Mathlib/RingTheory/Valuation/Extension.lean,Mathlib/RingTheory/Valuation/ValuationSubring.lean,Mathlib/SetTheory/Ordinal/Basic.lean,Mathlib/Tactic/FastInstance.lean,Mathlib/Topology/Algebra/Group/GroupTopology.lean 111 5 ['github-actions', 'kim-em', 'leanprover-radar', 'mathlib-merge-conflicts'] nobody
3-82856
3 days ago
4-85892
4 days ago
0-468
7 minutes
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
1-62784
1 day ago
4-495
4 days ago
27-58977
27 days
33010 xgenereux
author:xgenereux
 feat: localizations of primes in Dedekind domains are valuation subrings The goal of this PR is the theorem `valuationSubringAtPrime_eq_valuationSubring` which states that the localization at a nonzero prime in a Dedekind domain is precisely the valuation subring of the valuation associated with that same prime. Given a Dedekind domain `R` in its field of fractions `K`, we define `IsDedekindDomain.valuationSubringAtPrime`, which is the localization of `R` at a nonzero prime, viewed as valuation subring of `K`. We show that `valuationSubringAtPrime K v ≤ (valuation K v).valuationSubring` and use maximality to show that they must be equal. Other small note: - added a variant of `intValuation_exists_uniformizer` in terms of `valuation` (instead of intValuation). Co-authored-by: María Inés de Frutos Fernández <[mariaines.dff@gmail.com](mailto:mariaines.dff@gmail.com)> --- - [ ] depends on: #33631 - [ ] depends on: #33634 [![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 109/5 Mathlib/RingTheory/DedekindDomain/AdicValuation.lean,Mathlib/RingTheory/Valuation/ValuationSubring.lean 2 11 ['erdOne', 'github-actions', 'mathlib4-dependent-issues-bot', 'xgenereux'] nobody
0-39714
11 hours ago
87-12161
87 days ago
2-24474
2 days
36592 Vierkantor
author:Vierkantor
 chore(Tactic): rewrite `introv` tactic docstring This PR rewrites the docstrings for the `introv` tactic, to consistently match the official style guide, to make sure they are complete while not getting too long. In particular, I wanted to clarify exactly what `introv` does and does not introduce, depending on the list of names given to it. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) documentation t-meta 21/19 Mathlib/Tactic/Basic.lean 1 2 ['github-actions'] dwrensha
assignee:dwrensha
0-18728
5 hours ago
3-68128
3 days ago
3-68083
3 days

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
575-35536
1 year ago
639-25122
639 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
574-45501
1 year ago
584-5263
584 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
81-29774
2 months ago
81-29774
81 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', 'leanprover-community-mathlib4-bot', 'urkud'] nobody
49-33709
1 month ago
670-34703
670 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
44-29774
1 month ago
335-21006
335 days ago
0-1017
16 minutes
36663 plp127
author:plp127
 fix(Computability/Halting): remove `set_option linter.flexible false` Also unsqueeze some terminal `simp`s. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) tech debt t-computability 12/17 Mathlib/Computability/Halting.lean 1 1 ['github-actions'] nobody
2-9125
2 days ago
2-9203
2 days ago
2-9158
2 days
36510 Parcly-Taxel
author:Parcly-Taxel
 chore: delete >6 month old deprecated modules * Every `deprecated_module` up to and including `2025-09-12`. * `Mathlib.Deprecated.Estimator` and `Mathlib.Deprecated.MLList.BestFirst` from #29549. * `Mathlib.Data.Nat.PartENat` from #29231. * `Mathlib.Deprecated.RingHom` from #33429 – at the time it was removed (see https://github.com/leanprover-community/mathlib4/blob/561ba4ae9408025b2d4c9403116b575b7d2a0205/Mathlib/Deprecated/RingHom.lean) there were only two declarations inside and they both had `@[deprecated (since := "2025-06-09")]`, so there was effectively a `deprecated_module (since := "2025-06-09")` on top. file-removed tech debt 0/1606 Mathlib.lean,Mathlib/Analysis/NormedSpace/BallAction.lean,Mathlib/Analysis/NormedSpace/DualNumber.lean,Mathlib/Analysis/NormedSpace/FunctionSeries.lean,Mathlib/Analysis/NormedSpace/HomeomorphBall.lean,Mathlib/Analysis/NormedSpace/IndicatorFunction.lean,Mathlib/Analysis/NormedSpace/Int.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/Pointwise.lean,Mathlib/Analysis/NormedSpace/RCLike.lean,Mathlib/Analysis/NormedSpace/Real.lean,Mathlib/Analysis/NormedSpace/SphereNormEquiv.lean,Mathlib/Data/Nat/PartENat.lean,Mathlib/Deprecated/Estimator.lean,Mathlib/Deprecated/MLList/BestFirst.lean,Mathlib/Deprecated/Order.lean,Mathlib/Deprecated/RingHom.lean,Mathlib/RingTheory/Valuation/IntegrallyClosed.lean,Mathlib/Topology/Algebra/Module/StrongDual.lean,MathlibTest/search/BestFirst.lean 27 1 ['github-actions'] nobody
2-1153
2 days ago
5-16064
5 days ago
5-16019
5 days
36195 Vierkantor
author:Vierkantor
 chore(*): add backticks around identifiers in docstrings This PR fixes docstrings that refer to identifiers (like add_comm) with underscores or non-balanced [square brackets], by putting `backticks` around those identifiers (or $\LaTeX$ dollar signs, as appropriate). These were spotted by a WIP linter, and are intended to ease the transition to Verso docstrings (where these issues will become errors). Another PR will fix references to identifiers that have been renamed (those that had underscores in Lean 3). --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) documentation tech debt 159/132 Mathlib/Algebra/Group/NatPowAssoc.lean,Mathlib/Algebra/Lie/UniversalEnveloping.lean,Mathlib/Algebra/MvPolynomial/Degrees.lean,Mathlib/Algebra/Polynomial/RuleOfSigns.lean,Mathlib/AlgebraicGeometry/Geometrically/Integral.lean,Mathlib/AlgebraicTopology/DoldKan/Degeneracies.lean,Mathlib/Analysis/CStarAlgebra/Spectrum.lean,Mathlib/Analysis/Fourier/AddCircle.lean,Mathlib/Analysis/Real/Cardinality.lean,Mathlib/Analysis/Real/OfDigits.lean,Mathlib/Analysis/SpecialFunctions/Arcosh.lean,Mathlib/Analysis/SpecialFunctions/Complex/Arg.lean,Mathlib/Analysis/SpecialFunctions/Trigonometric/Chebyshev/RootsExtrema.lean,Mathlib/CategoryTheory/EqToHom.lean,Mathlib/CategoryTheory/Functor/Flat.lean,Mathlib/CategoryTheory/Limits/Shapes/Equalizers.lean,Mathlib/CategoryTheory/Limits/Shapes/Multiequalizer.lean,Mathlib/Computability/TuringMachine/ToPartrec.lean,Mathlib/Data/Int/Cast/Field.lean,Mathlib/Data/List/Defs.lean,Mathlib/Data/List/Rotate.lean,Mathlib/Data/PNat/Xgcd.lean,Mathlib/Data/ZMod/Factorial.lean,Mathlib/FieldTheory/Minpoly/Field.lean,Mathlib/GroupTheory/Schreier.lean,Mathlib/InformationTheory/KullbackLeibler/KLFun.lean,Mathlib/LinearAlgebra/Alternating/Uncurry/Fin.lean,Mathlib/LinearAlgebra/CliffordAlgebra/BaseChange.lean,Mathlib/LinearAlgebra/Dual/Basis.lean,Mathlib/LinearAlgebra/ExteriorPower/Basis.lean,Mathlib/LinearAlgebra/LinearDisjoint.lean,Mathlib/MeasureTheory/Group/Measure.lean,Mathlib/MeasureTheory/Integral/IntegralEqImproper.lean,Mathlib/MeasureTheory/Integral/IntervalIntegral/Periodic.lean,Mathlib/MeasureTheory/Measure/LevyProkhorovMetric.lean,Mathlib/MeasureTheory/Measure/Restrict.lean,Mathlib/MeasureTheory/VectorMeasure/Decomposition/Hahn.lean,Mathlib/ModelTheory/Basic.lean,Mathlib/NumberTheory/LucasPrimality.lean,Mathlib/NumberTheory/Modular.lean,Mathlib/NumberTheory/Padics/Hensel.lean,Mathlib/NumberTheory/Padics/PadicVal/Basic.lean,Mathlib/Order/LiminfLimsup.lean,Mathlib/Probability/Distributions/Gaussian/HasGaussianLaw/Independence.lean,Mathlib/Probability/Independence/Basic.lean,Mathlib/Probability/Independence/Conditional.lean,Mathlib/Probability/Independence/Kernel/Indep.lean,Mathlib/Probability/Martingale/Upcrossing.lean,Mathlib/RingTheory/DedekindDomain/Factorization.lean,Mathlib/RingTheory/DividedPowers/Padic.lean,Mathlib/RingTheory/Ideal/Maps.lean,Mathlib/RingTheory/IntegralDomain.lean,Mathlib/RingTheory/LinearDisjoint.lean,Mathlib/RingTheory/Localization/AtPrime/Basic.lean,Mathlib/RingTheory/MvPolynomial/WeightedHomogeneous.lean,Mathlib/RingTheory/Regular/RegularSequence.lean,Mathlib/Tactic/Algebraize.lean,Mathlib/Tactic/ArithMult.lean,Mathlib/Tactic/ArithMult/Init.lean,Mathlib/Tactic/FieldSimp/Attr.lean,Mathlib/Tactic/FieldSimp/Lemmas.lean,Mathlib/Tactic/FunProp/Types.lean,Mathlib/Tactic/LinearCombination'.lean,Mathlib/Tactic/LinearCombination.lean,Mathlib/Tactic/LinearCombination/Lemmas.lean,Mathlib/Tactic/Linter/TextBased.lean,Mathlib/Tactic/NormNum/Basic.lean,Mathlib/Tactic/NormNum/Inv.lean,Mathlib/Tactic/SetLike.lean,Mathlib/Tactic/SplitIfs.lean,Mathlib/Tactic/SwapVar.lean,Mathlib/Tactic/Translate/Core.lean,Mathlib/Tactic/Widget/SelectPanelUtils.lean,Mathlib/Topology/Order/LowerUpperTopology.lean,Mathlib/Topology/Order/UpperLowerSetTopology.lean,Mathlib/Util/AtomM.lean 76 14 ['Vierkantor', 'github-actions', 'grunweg', 'mathlib-merge-conflicts'] nobody
0-55386
15 hours ago
0-55419
15 hours ago
4-18522
4 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. --- [![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/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/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 2 ['github-actions', 'mathlib-merge-conflicts'] nobody
0-28307
7 hours ago
0-55188
15 hours ago
0-55186
15 hours
35878 Parcly-Taxel
author:Parcly-Taxel
 chore: use `induction` for `Quotient.induction` invocations Found through the regex `(refine|apply|exact).*Quotient.induction`. Includes the multiple-argument variants. tech debt maintainer-merge 100/101 Mathlib/Algebra/GroupWithZero/Associated.lean,Mathlib/Algebra/Lie/Quotient.lean,Mathlib/Algebra/Module/ZLattice/Basic.lean,Mathlib/AlgebraicTopology/SimplexCategory/GeneratorsRelations/Basic.lean,Mathlib/CategoryTheory/Abelian/Pseudoelements.lean,Mathlib/CategoryTheory/Monoidal/Free/Basic.lean,Mathlib/CategoryTheory/Subobject/Basic.lean,Mathlib/Combinatorics/Tiling/Tile.lean,Mathlib/Computability/TuringMachine/Tape.lean,Mathlib/Data/Multiset/Functor.lean,Mathlib/Data/Multiset/Sym.lean,Mathlib/Data/Setoid/Basic.lean,Mathlib/FieldTheory/Fixed.lean,Mathlib/GroupTheory/Perm/Cycle/Concrete.lean,Mathlib/LinearAlgebra/Alternating/DomCoprod.lean,Mathlib/LinearAlgebra/Quotient/Pi.lean,Mathlib/Logic/Equiv/Basic.lean,Mathlib/NumberTheory/Padics/PadicNumbers.lean,Mathlib/NumberTheory/RamificationInertia/Basic.lean,Mathlib/Order/Category/PartOrd.lean,Mathlib/Order/RelIso/Basic.lean,Mathlib/RingTheory/AdicCompletion/Algebra.lean,Mathlib/RingTheory/AdicCompletion/Basic.lean,Mathlib/RingTheory/AdicCompletion/Functoriality.lean,Mathlib/RingTheory/Ideal/Norm/AbsNorm.lean,Mathlib/SetTheory/Cardinal/Cofinality.lean,Mathlib/SetTheory/Ordinal/Arithmetic.lean,Mathlib/Topology/Algebra/InfiniteSum/Module.lean 28 11 ['github-actions', 'joneugster', 'mathlib-merge-conflicts'] joneugster
assignee:joneugster
0-23441
6 hours ago
1-12719
1 day ago
14-64849
14 days
36751 vlad902
author:vlad902
 chore(Data): remove some `set_option linter.flexible false` --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) tech debt t-data 28/56 Mathlib/Data/EReal/Operations.lean,Mathlib/Data/Nat/Digits/Defs.lean,Mathlib/Data/Nat/Digits/Lemmas.lean,Mathlib/Data/Num/Lemmas.lean,Mathlib/Data/Rat/Cast/CharZero.lean,Mathlib/Data/Set/Prod.lean,Mathlib/Data/WSeq/Basic.lean 7 3 ['github-actions', 'grunweg', 'plp127'] nobody
0-22938
6 hours ago
0-27991
7 hours ago
0-28781
7 hours

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 astrainfinita
author:astrainfinita
 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
481-64569
1 year ago
488-57128
488 days ago
33-53295
33 days
8370 eric-wieser
author:eric-wieser
 refactor(Analysis/NormedSpace/Exponential): remove the `𝕂` argument from `exp` This argument is still needed for almost all the lemmas, which means it can longer be found by unification. We keep around `expSeries 𝕂 A`, as it's needed for talking about the radius of convergence over different base fields. This is a prerequisite for #8372, as we can't merge the functions until they have the same interface.\ Zulip thread: [#mathlib4 > Real.exp @ 💬](https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/Real.2Eexp/near/401602245) --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) This is started from the mathport output on https://github.com/leanprover-community/mathlib/pull/19244 merge-conflict t-analysis awaiting-zulip 432/387 Mathlib/Analysis/CStarAlgebra/Exponential.lean,Mathlib/Analysis/CStarAlgebra/Spectrum.lean,Mathlib/Analysis/Normed/Algebra/Exponential.lean,Mathlib/Analysis/Normed/Algebra/MatrixExponential.lean,Mathlib/Analysis/Normed/Algebra/QuaternionExponential.lean,Mathlib/Analysis/Normed/Algebra/Spectrum.lean,Mathlib/Analysis/Normed/Algebra/TrivSqZeroExt.lean,Mathlib/Analysis/NormedSpace/DualNumber.lean,Mathlib/Analysis/SpecialFunctions/ContinuousFunctionalCalculus/ExpLog.lean,Mathlib/Analysis/SpecialFunctions/Exponential.lean,Mathlib/Analysis/SpecialFunctions/Trigonometric/Series.lean 11 29 ['YaelDillies', 'eric-wieser', 'girving', 'github-actions', 'j-loreaux', 'kbuzzard', 'leanprover-community-bot-assistant', 'urkud'] nobody
326-19946
10 months ago
347-32588
347 days ago
24-46029
24 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
315-27846
10 months ago
584-51031
584 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
255-8195
8 months ago
526-42238
526 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
255-7033
8 months ago
287-68550
287 days ago
6-44784
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
195-22678
6 months ago
203-60232
203 days ago
0-19882
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
151-86288
5 months ago
203-31685
203 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
124-10762
4 months ago
163-75828
163 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
119-27894
3 months ago
538-55282
538 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
118-44135
3 months ago
464-7665
464 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
117-81303
3 months ago
315-27832
315 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
117-53169
3 months ago
592-73451
592 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 629/0 Mathlib.lean,Mathlib/Data/QuotType.lean,MathlibTest/QuotType.lean 3 20 ['YaelDillies', 'astrainfinita', 'github-actions', 'mathlib4-merge-conflict-bot', 'plp127', 'vihdzp'] nobody
96-35015
3 months ago
149-3868
149 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
69-3328
2 months ago
69-50061
69 days ago
7-33574
7 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
label:t-algebra$
 4/0 Mathlib/Algebra/Order/Group/Defs.lean 1 8 ['Garmelon', 'Vierkantor', 'artie2000', 'github-actions', 'leanprover-radar'] eric-wieser
assignee:eric-wieser
53-52163
1 month ago
53-52163
53 days ago
40-42357
40 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 531/0 Mathlib.lean,Mathlib/Combinatorics/Enumerative/Partition/EulerComb.lean 2 5 ['chiyunhsu', 'github-actions', 'tb65536', 'vihdzp'] b-mehta
assignee:b-mehta
46-56981
1 month ago
46-56981
46 days ago
42-22427
42 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
label:t-algebra$
 300/2 Mathlib.lean,Mathlib/LinearAlgebra/PiTensorProduct.lean,Mathlib/LinearAlgebra/PiTensorProduct/Set.lean 3 28 ['PrParadoxy', 'dagurtomas', 'eric-wieser', 'github-actions', 'goliath-klein', 'leanprover-radar', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] dagurtomas
assignee:dagurtomas
43-69586
1 month ago
84-46488
84 days ago
10-66980
10 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 4/0 Mathlib/MeasureTheory/Constructions/Polish/Basic.lean 1 9 ['ADedecker', 'LTolDe', 'dupuisf', 'github-actions', 'jcommelin'] PatrickMassot
assignee:PatrickMassot
43-69391
1 month ago
69-53523
69 days ago
11-7507
11 days
34720 Paul-Lez
author:Paul-Lez
 feat(RingTheory/PowerSeries/Composition): define composition of power series This PR defines the composition of two power series, and adds various pieces of API lemmas (this is mostly fixing up and upstreaming code from [this repo](https://github.com/rmhi/formal_deriv)). This is the first of a series of PRs upstreaming work that was done at the CFT workshop in Oxford last summer, working towards proving some results about the `exp` and `log` power series (and their composition!), and constructing the isomorphism $(\mathfrak{m}_K ^ n, +) \cong (1 + \mathfrak{m}_K ^ n, \times)$ for sufficiently large $n$, where $K$ is a characteristic zero local field. Co-authored-by: Richard Hill Co-authored-by: Calle Sönne --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-ring-theory awaiting-zulip 844/0 Mathlib.lean,Mathlib/RingTheory/PowerSeries/Composition.lean 2 3 ['Paul-Lez', 'github-actions', 'vihdzp'] nobody
35-29000
1 month ago
42-67320
42 days ago
0-10
10 seconds
33441 dupuisf
author:dupuisf
 feat: add `LawfulInv` class for types with an inverse that behaves like `Ring.inverse` This PR introduces a new typeclass `LawfulInv` for types which have an `Inv` instance that is equal to zero on non-invertible elements. This is meant to replace `Ring.inverse`. The current plan is to do this refactor in several steps: 1. This PR, which only introduces the class and adds instances for matrices and continuous linear maps. 2. Add instances for all C*-algebras, and make `CStarAlgebra` extend this. 3. Deprecate `Ring.inverse`. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) awaiting-zulip t-algebra merge-conflict
label:t-algebra$
 185/27 Mathlib/Algebra/GroupWithZero/Defs.lean,Mathlib/Algebra/GroupWithZero/Invertible.lean,Mathlib/Algebra/GroupWithZero/Units/Basic.lean,Mathlib/LinearAlgebra/Matrix/NonsingularInverse.lean,Mathlib/LinearAlgebra/Matrix/PosDef.lean,Mathlib/RingTheory/DividedPowers/Padic.lean,Mathlib/Topology/Algebra/Module/Equiv.lean 7 35 ['dupuisf', 'eric-wieser', 'github-actions', 'j-loreaux', 'mathlib-merge-conflicts', 'mathlib4-merge-conflict-bot', 'plp127'] nobody
27-1339
27 days ago
55-34474
55 days ago
7-54141
7 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 19 ['adomani', 'eric-wieser', 'github-actions', 'grunweg', 'joneugster', 'kim-em', 'leanprover-bot', 'leanprover-radar', 'mathlib-bors', 'mathlib4-merge-conflict-bot'] grunweg
assignee:grunweg
26-80165
26 days ago
199-76483
199 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 23/2 Mathlib/Tactic/Linter/TextBased.lean 1 4 ['github-actions', 'grunweg', 'joneugster', 'vihdzp'] nobody
24-50784
24 days ago
25-73464
25 days ago
0-187
3 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 10/10 Mathlib/Control/Monad/Cont.lean,Mathlib/Control/Monad/Writer.lean 2 4 ['Shreyas4991', 'eric-wieser', 'github-actions'] nobody
24-29298
24 days ago
24-29299
24 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
18-74537
18 days ago
364-52476
364 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
18-74521
18 days ago
315-56415
315 days ago
39-61332
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
18-8150
18 days ago
282-37449
282 days ago
34-10092
34 days
34649 peabrainiac
author:peabrainiac
 feat(Analysis/Calculus/ContDiff): add notation `ℕ∞ω` for `WithTop ℕ∞` Add a `ContDiff`-scoped notation `ℕ∞ω` for `WithTop ℕ∞`, accompanying the existing notations `∞` and `ω` for `(⊤ : ℕ∞) : ℕ∞ω` and `⊤ : ℕ∞ω`. --- [Zulip discussion](https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/RFC.3A.20notation.20for.20.60WithTop.20.E2.84.95.E2.88.9E.60/near/573917824) I've also replaced `WithTop ℕ∞` with this new notation already in the files that mention it the most, but not in all files yet; many mention `WithTop ℕ∞` just a couple of times but don't open the `ContDiff` namespace. I'm not sure whether that should be taken as a sign to not make the notation scoped, or whether the solution is just to `open scoped ContDiff` in these files or not use the notation there. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-differential-geometry t-analysis awaiting-author awaiting-zulip merge-conflict 221/218 Mathlib/Analysis/Calculus/BumpFunction/FiniteDimension.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/Defs.lean,Mathlib/Analysis/Calculus/ContDiff/Deriv.lean,Mathlib/Analysis/Calculus/ContDiff/FTaylorSeries.lean,Mathlib/Analysis/Calculus/ContDiff/Operations.lean,Mathlib/Analysis/Calculus/FDeriv/Symmetric.lean,Mathlib/Analysis/Calculus/ImplicitContDiff.lean,Mathlib/Analysis/Calculus/IteratedDeriv/Defs.lean,Mathlib/Analysis/Calculus/VectorField.lean,Mathlib/Analysis/Distribution/ContDiffMapSupportedIn.lean,Mathlib/Analysis/SpecialFunctions/Log/Deriv.lean,Mathlib/Analysis/SpecialFunctions/Trigonometric/InverseDeriv.lean,Mathlib/Geometry/Manifold/Algebra/LieGroup.lean,Mathlib/Geometry/Manifold/Algebra/Monoid.lean,Mathlib/Geometry/Manifold/Algebra/SmoothFunctions.lean,Mathlib/Geometry/Manifold/Algebra/Structures.lean,Mathlib/Geometry/Manifold/ContMDiff/Atlas.lean,Mathlib/Geometry/Manifold/ContMDiff/Basic.lean,Mathlib/Geometry/Manifold/ContMDiff/Defs.lean,Mathlib/Geometry/Manifold/Instances/Sphere.lean,Mathlib/Geometry/Manifold/Instances/UnitsOfNormedAlgebra.lean,Mathlib/Geometry/Manifold/IsManifold/Basic.lean,Mathlib/Geometry/Manifold/VectorBundle/Basic.lean,Mathlib/Geometry/Manifold/VectorBundle/FiberwiseLinear.lean 28 5 ['github-actions', 'j-loreaux', 'mathlib-merge-conflicts', 'peabrainiac'] sgouezel
assignee:sgouezel
15-40089
15 days ago
34-28330
34 days ago
8-6287
8 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 5 ['SnirBroshi', 'TwoFX', 'eric-wieser', 'github-actions', 'mathlib-merge-conflicts'] TwoFX
assignee:TwoFX
13-76751
13 days ago
109-80091
109 days ago
35-84279
35 days
34245 staroperator
author:staroperator
 feat(Data/Set): add `Set.Uncountable` There are `Set` specialized shortcuts `Set.Finite`, `Set.Infinite` and `Set.Countable`, but lacking `Set.Uncountable`. I find this useful in #34246. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-data awaiting-zulip 82/4 Mathlib/Analysis/Real/Cardinality.lean,Mathlib/Data/Set/Countable.lean,Mathlib/SetTheory/Cardinal/Basic.lean 3 17 ['github-actions', 'joneugster', 'staroperator', 'vihdzp'] joneugster
assignee:joneugster
10-72764
10 days ago
41-46011
41 days ago
12-21154
12 days
33972 YuvalFilmus
author:YuvalFilmus
 feat(Analysis/Polynomial/Order): polynomial has fixed sign beyond largest root We prove that a polynomial has fixed sign beyond its largest root. One could also prove similar results about the smallest root, but they will be more awkward since they will depend on the parity of the (natural) degree; suggestions welcome (perhaps for a future PR). --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-analysis awaiting-zulip 134/0 Mathlib.lean,Mathlib/Analysis/Polynomial/Order.lean 2 14 ['YuvalFilmus', 'artie2000', 'github-actions', 'mathlib-merge-conflicts', 'urkud', 'vihdzp'] ADedecker and urkud
assignee:urkud assignee:ADedecker
10-45823
10 days ago
21-49930
21 days ago
39-23486
39 days
34077 kbuzzard
author:kbuzzard
 perf: increase priority of instSMulOfMul #31040 deprecated `Mul.toSMul` in place of the core instance `instSMulOfMul`, which is at a lowered priority of 910. This PR undeprecates it and makes it a higher priority instance (1100) which seems better for mathlib. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) This PR follows the philosophy seen in Mathlib's `Algebra.id : Algebra R R`, which also has raised priority. The idea is the same as `Algebra.id`: if you're looking for an instance of `Algebra R S` with R not equal to S then `Algebra.id` is extremely likely to fail quickly in practice, and if you're looking for an instance of `Algebra R R` then `Algebra.id` is unambiguously the right answer so should be tried ASAP. However the instance is defined so early in mathlib that in in practice it is tried last unless the priority is raised. The same philosophy holds here; if you're looking for an instance of `SMul X X` then you absolutely want to try `Mul.toSMul` first and if you're looking for an instance of `SMul X Y` with Y not X then `Mul.toSMul` will in practice be quick to fail. This PR was inspired by #33908 (another "this should be quick to fail and if it fits then it's almost certainly what we want" prio change) which made an instance of `IsScalarTower R A A` high priority and gave a performance boost. This PR also gives a performance boost. Note that the performance in #31040 looks very bad but the radar output is incorrect; there was a hardware change between the two runs. In fact #31040 produced no changes in profiling, as one might expect. I don't know the correct way to change the priority of a core instance in mathlib, and I didn't know if just changing the priority naively would work repo-wide rather than just file-wide, which was why this PR introduces a second instance. Zulip discussion at [#mathlib4 > priority hacks](https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/priority.20hacks/with/574353616) t-algebra awaiting-zulip merge-conflict
label:t-algebra$
 3/9 Mathlib/Algebra/Group/Action/Defs.lean,Mathlib/Algebra/Group/Action/Units.lean 2 26 ['alreadydone', 'github-actions', 'kbuzzard', 'leanprover-radar', 'mathlib-merge-conflicts'] jcommelin
assignee:jcommelin
6-78643
6 days ago
26-81490
26 days ago
0-56658
15 hours
36522 nielsvoss
author:nielsvoss
 chore(Topology): rename lim -> Filter.lim and limUnder -> Filter.limUnder, and make a lemma protected Add the namespace `Filter` to `lim` and `limUnder`, since the docstring for `lim` suggests that they were never intended to be placed in the namespace. Also make `MeasureTheory.StronglyMeasurable.limUnder` protected, to allow its proof to refer to `Filter.limUnder` as `limUnder`. See discussion here: https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/Rename.20lim.20to.20Filter.2Elim.3F/with/578862980 --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-topology awaiting-zulip 12/8 Mathlib/MeasureTheory/Constructions/Polish/StronglyMeasurable.lean,Mathlib/MeasureTheory/Function/FactorsThrough.lean,Mathlib/Topology/Defs/Filter.lean 3 7 ['github-actions', 'grunweg', 'nielsvoss'] nobody
4-41860
4 days ago
4-74341
4 days ago
0-1564
26 minutes

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
593-79149
1 year ago
643-57551
643 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
593-79148
1 year ago
833-69044
833 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 36 ['adomani', 'alreadydone', 'digama0', 'eric-wieser', 'ericrbg', 'jcommelin', 'leanprover-bot', 'sgouezel'] nobody
593-79147
1 year ago
868-44644
868 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
593-79147
1 year ago
648-9255
648 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
593-79146
1 year ago
865-65146
865 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
579-72691
1 year ago
705-81528
705 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
575-35536
1 year ago
639-25122
639 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. --- - [ ] 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', 'leanprover-community-mathlib4-bot'] nobody
575-35395
1 year ago
703-52336
703 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
575-35294
1 year ago
661-45278
661 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
574-56448
1 year ago
609-62670
609 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
572-58722
1 year ago
691-50350
691 days ago
19-74546
19 days
17127 astrainfinita
author:astrainfinita
 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
533-7387
1 year ago
533-7387
533 days ago
4-72805
4 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
496-2853
1 year ago
496-2853
496 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
475-66008
1 year ago
475-66008
475 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
473-42085
1 year ago
473-42085
473 days ago
3-72207
3 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
462-7754
1 year ago
462-7754
462 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
434-23928
1 year ago
434-23928
434 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
427-54960
1 year ago
427-54960
427 days ago
6-66637
6 days
18474 astrainfinita
author:astrainfinita
 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
425-41990
1 year ago
425-41990
425 days ago
76-67978
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
412-66247
1 year ago
412-66247
412 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
376-52268
1 year ago
376-52268
376 days ago
16-76141
16 days
18470 astrainfinita
author:astrainfinita
 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
372-23695
1 year ago
372-23695
372 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
369-23427
1 year ago
550-75777
550 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
364-74523
11 months ago
364-74523
364 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
341-60670
11 months ago
341-60671
341 days ago
57-47357
57 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
341-60668
11 months ago
341-60670
341 days ago
36-69400
36 days
16314 astrainfinita
author:astrainfinita
 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
335-85634
11 months ago
335-85636
335 days ago
55-36935
55 days
15483 astrainfinita
author:astrainfinita
 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
335-30527
11 months ago
583-68857
583 days ago
4-79214
4 days
16594 astrainfinita
author:astrainfinita
 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
335-30303
11 months ago
539-69850
539 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
328-73544
10 months ago
341-84185
341 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
326-50319
10 months ago
326-50321
326 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
326-39016
10 months ago
326-39017
326 days ago
2-12017
2 days
13649 astrainfinita
author:astrainfinita
 chore: redefine `Nat.div2` `Nat.bodd` The new definitions are faster than the old ones. `Nat.binaryRec` will be moved to batteries (https://github.com/leanprover-community/batteries/pull/799) or core (https://github.com/leanprover/lean4/pull/3756), so relevant contents are moved to a new file temporarily. --- - [x] depends on: #15567 - [x] depends on: #19666 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict 63/88 Mathlib/Computability/Primrec.lean,Mathlib/Data/Int/Bitwise.lean,Mathlib/Data/Nat/Bits.lean,Mathlib/Data/Nat/Bitwise.lean,Mathlib/Data/Nat/Size.lean,Mathlib/Logic/Denumerable.lean,Mathlib/Logic/Encodable/Basic.lean,Mathlib/Logic/Equiv/Nat.lean 8 15 ['astrainfinita', 'digama0', 'eric-wieser', 'github-actions', 'leanprover-community-bot-assistant', 'mathlib4-dependent-issues-bot', 'urkud'] digama0
assignee:digama0
318-22566
10 months ago
318-22568
318 days ago
87-49908
87 days
23546 JovanGerb
author:JovanGerb
 feat(LinearAlgebra/AffineSpace/AffineSubspace): rename `AffineSubspace.mk'` to `Submodule.shift` In addition to renaming, I've refactored the code a bit: - `mem_mk'_iff_vsub_mem` was obsolete since it was the same as `mem_mk'`, so I removed it (this is due to a change in the definition I made recently) - I added a nonempty instance for `shift` - I added a simp lemma that `shift` isn't equal to `⊥` (the empty affine subspace). I need this for the next point. - Edit: I'll leave this for a later PR. ~I proved a simp lemma that a `shift` is parallel to a `shift` if and only if the linear subspaces are the same.~ - I renamed `mk'_eq` to `shift_direction_eq_self `. - I renamed `eq_or_eq_secondInter_of_mem_mk'_span_singleton_iff_mem` to `eq_or_eq_secondInter_iff_mem_of_mem_shift_span_singleton`. I think it is better to put the `of_mem_mk'_span_singleton` at the end of the name. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-euclidean-geometry 128/99 Mathlib/Algebra/Module/ZLattice/Basic.lean,Mathlib/Geometry/Euclidean/Basic.lean,Mathlib/Geometry/Euclidean/MongePoint.lean,Mathlib/Geometry/Euclidean/PerpBisector.lean,Mathlib/Geometry/Euclidean/Sphere/SecondInter.lean,Mathlib/Geometry/Euclidean/Sphere/Tangent.lean,Mathlib/LinearAlgebra/AffineSpace/AffineSubspace/Defs.lean 7 4 ['JovanGerb', 'github-actions', 'leanprover-community-bot-assistant'] nobody
316-55548
10 months ago
323-32581
323 days ago
26-22460
26 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
293-45766
9 months ago
293-45768
293 days ago
35-30364
35 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
282-68593
9 months ago
282-68595
282 days ago
6-39812
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
270-60334
8 months ago
502-58233
502 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
270-60332
8 months ago
502-59876
502 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
270-60331
8 months ago
502-60518
502 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
267-42622
8 months ago
505-68838
505 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
255-7282
8 months ago
255-7282
255 days ago
40-60910
40 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
255-7036
8 months ago
255-7037
255 days ago
45-4562
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
255-6724
8 months ago
255-6724
255 days ago
18-21880
18 days
24405 mcdoll
author:mcdoll
 refactor(Topology/Algebra/Module/WeakDual): Clean up - Move `Dual` and `dualPairing` lower in the import-hierachy - deduplicate `dualPairing` - Make `WeakDual` and `WeakSpace` reducible --- New version of #11500 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-topology large-import 146/162 Mathlib.lean,Mathlib/Analysis/Fourier/RiemannLebesgueLemma.lean,Mathlib/Analysis/InnerProductSpace/Adjoint.lean,Mathlib/Analysis/InnerProductSpace/Dual.lean,Mathlib/Analysis/LocallyConvex/WeakSpace.lean,Mathlib/Analysis/Normed/Module/Dual.lean,Mathlib/Analysis/Normed/Module/WeakDual.lean,Mathlib/Analysis/VonNeumannAlgebra/Basic.lean,Mathlib/MeasureTheory/Function/AEEqOfIntegral.lean,Mathlib/MeasureTheory/Measure/FiniteMeasure.lean,Mathlib/Topology/Algebra/Module/Dual.lean,Mathlib/Topology/Algebra/Module/WeakDual.lean,docs/overview.yaml,docs/undergrad.yaml 14 2 ['github-actions', 'leanprover-community-bot-assistant'] nobody
253-58553
8 months ago
253-58554
253 days ago
69-52361
69 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
251-74502
8 months ago
251-74502
251 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
224-71764
7 months ago
255-7033
255 days ago
38-26044
38 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
223-22717
7 months ago
223-22717
223 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
217-55220
7 months ago
217-55221
217 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
217-54849
7 months ago
217-54850
217 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
215-69473
7 months ago
215-69474
215 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
215-24269
7 months ago
215-24269
215 days ago
71-28496
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
209-27749
6 months ago
209-27750
209 days ago
0-66771
18 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
207-56875
6 months ago
207-56876
207 days ago
2-47570
2 days
13795 astrainfinita
author:astrainfinita
 perf(Algebra/{Group, GroupWithZero, Ring}/InjSurj): reduce everything --- - [ ] depends on: #15192 - [ ] depends on: #15476 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-algebra
label:t-algebra$
 340/194 Mathlib/Algebra/Equiv/TransferInstance.lean,Mathlib/Algebra/Group/InjSurj.lean,Mathlib/Algebra/GroupWithZero/Action/Defs.lean,Mathlib/Algebra/GroupWithZero/Action/End.lean,Mathlib/Algebra/GroupWithZero/InjSurj.lean,Mathlib/Algebra/Module/Defs.lean,Mathlib/Algebra/Module/RingHom.lean,Mathlib/Algebra/Ring/InjSurj.lean,scripts/noshake.json 9 37 ['MichaelStollBayreuth', 'astrainfinita', 'eric-wieser', 'github-actions', 'leanprover-bot', 'leanprover-community-bot-assistant', 'mathlib4-dependent-issues-bot', 'mattrobball'] nobody
206-62946
6 months ago
335-77951
335 days ago
47-81764
47 days
28150 Equilibris
author:Equilibris
 chore: clean up proofs typevec proofs While adding variable universe corecs I found a lot of theorems in typevec that could do with a bit of a clean-up --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-data new-contributor 24/26 Mathlib/Data/TypeVec.lean 1 7 ['Equilibris', 'alexkeizer', 'github-actions', 'mathlib4-merge-conflict-bot'] nobody
206-24191
6 months ago
206-24192
206 days ago
13-49738
13 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
206-3511
6 months ago
228-65833
228 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
206-3465
6 months ago
215-54909
215 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
205-51743
6 months ago
228-65834
228 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
201-8677
6 months ago
201-8678
201 days ago
13-2028
13 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
189-55023
6 months ago
189-55024
189 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
189-50062
6 months ago
244-79757
244 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
188-63913
6 months ago
245-85225
245 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
188-57774
6 months ago
188-57775
188 days ago
10-61840
10 days
27933 grunweg
author:grunweg
 chore(OrdNode): format code example in code blocks Wrap them in code blocks (and unindent them; that indentation is not needed any more). This also avoids warnings from the linter in #27898. ------- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-data 459/212 Mathlib/Data/Ordmap/Ordnode.lean 1 4 ['eric-wieser', 'github-actions', 'grunweg', 'mathlib4-merge-conflict-bot'] nobody
185-8407
6 months ago
185-8408
185 days ago
39-69478
39 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
182-70018
6 months ago
182-70019
182 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
173-81615
5 months ago
173-81616
173 days ago
19-81030
19 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
171-56725
5 months ago
252-56662
252 days ago
73-13048
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
168-46807
5 months ago
168-46808
168 days ago
0-4775
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
167-66209
5 months ago
262-73493
262 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
166-69434
5 months ago
258-78606
258 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
163-51149
5 months ago
334-23522
334 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
155-53280
5 months ago
155-53281
155 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
132-29878
4 months ago
132-29879
132 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
124-58482
4 months ago
124-58482
124 days ago
122-67006
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
117-81141
3 months ago
117-81142
117 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
117-80969
3 months ago
117-80970
117 days ago
177-42245
177 days
25974 scholzhannah
author:scholzhannah
 feat(Topology/Compactness/CompactlyCoherentSpace): compact coherentification (k-ification) This PR defines the notion of turning an arbitrary topological space into a compactly coherent space. Compactly coherent spaces are commonly referred to as "compactly generated spaces" or "k-spaces" in the literature while the operation of turning a space into such as space is called the "k-ification". There are however three different notions that are described with this name. To disambiguate we use the names "compactly coherent space" and "compactcoherentification" here. See [this wikipedia page](https://en.wikipedia.org/wiki/Compactly_generated_space) for an explanation of these notions. This PR continues the work from #25318. Original PR: https://github.com/leanprover-community/mathlib4/pull/25318 Co-authored-by: Floris van Doorn merge-conflict t-topology large-import 174/5 Mathlib/Topology/Compactness/CompactlyCoherentSpace.lean 1 5 ['github-actions', 'joelriou', 'mathlib4-merge-conflict-bot', 'scholzhannah'] ADedecker
assignee:ADedecker
117-80801
3 months ago
117-80802
117 days ago
147-64645
147 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
117-80447
3 months ago
117-80448
117 days ago
133-24576
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
117-80142
3 months ago
117-80143
117 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
117-79989
3 months ago
117-79990
117 days ago
71-37436
71 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
117-79951
3 months ago
117-79952
117 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
117-79355
3 months ago
117-79356
117 days ago
54-85998
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
117-74376
3 months ago
117-74377
117 days ago
11-62509
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
117-53300
3 months ago
787-58053
787 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
117-53253
3 months ago
801-58231
801 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
117-53211
3 months ago
768-21955
768 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
117-52603
3 months ago
251-77612
251 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
112-12970
3 months ago
334-21720
334 days ago
2-85335
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
91-25754
3 months ago
112-61703
112 days ago
60-67125
60 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 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 9 ['Jlh18', 'github-actions', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot', 'sinhp'] nobody
70-47155
2 months ago
158-53451
158 days ago
0-2073
34 minutes
33561 kbuzzard
author:kbuzzard
 chore: cont -> continuous_toFun This field is sometimes called `cont` and sometimes `continuous_toFun`. I noticed that the `continuity` tactic sometimes takes a lot longer to prove `cont` even if `continuous_toFun` is available so I thought I'd change them all to see if this speed up mathlib. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict 171/149 Mathlib/Algebra/Category/ContinuousCohomology/Basic.lean,Mathlib/Algebra/Category/ModuleCat/Topology/Homology.lean,Mathlib/Analysis/Analytic/Composition.lean,Mathlib/Analysis/Analytic/Polynomial.lean,Mathlib/Analysis/CStarAlgebra/CStarMatrix.lean,Mathlib/Analysis/CStarAlgebra/ContinuousFunctionalCalculus/NonUnital.lean,Mathlib/Analysis/CStarAlgebra/ContinuousFunctionalCalculus/Unital.lean,Mathlib/Analysis/Calculus/ContDiff/FaaDiBruno.lean,Mathlib/Analysis/Calculus/FDeriv/Basic.lean,Mathlib/Analysis/Calculus/FDeriv/Extend.lean,Mathlib/Analysis/Distribution/ContDiffMapSupportedIn.lean,Mathlib/Analysis/Distribution/DerivNotation.lean,Mathlib/Analysis/Distribution/SchwartzSpace.lean,Mathlib/Analysis/Distribution/TemperedDistribution.lean,Mathlib/Analysis/Distribution/TestFunction.lean,Mathlib/Analysis/Fourier/FourierTransform.lean,Mathlib/Analysis/Fourier/LpSpace.lean,Mathlib/Analysis/InnerProductSpace/LinearPMap.lean,Mathlib/Analysis/LocallyConvex/Barrelled.lean,Mathlib/Analysis/LocallyConvex/PointwiseConvergence.lean,Mathlib/Analysis/LocallyConvex/Separation.lean,Mathlib/Analysis/LocallyConvex/WeakOperatorTopology.lean,Mathlib/Analysis/LocallyConvex/WeakSpace.lean,Mathlib/Analysis/Normed/Affine/Isometry.lean,Mathlib/Analysis/Normed/Algebra/Spectrum.lean,Mathlib/Analysis/Normed/Lp/PiLp.lean,Mathlib/Analysis/Normed/Lp/ProdLp.lean,Mathlib/Analysis/Normed/Lp/lpSpace.lean,Mathlib/Analysis/Normed/Module/Alternating/Basic.lean,Mathlib/Analysis/Normed/Module/Multilinear/Basic.lean,Mathlib/Analysis/Normed/Module/WeakDual.lean,Mathlib/Analysis/Normed/Operator/Banach.lean,Mathlib/Analysis/Normed/Operator/BoundedLinearMaps.lean,Mathlib/Analysis/Normed/Operator/Extend.lean,Mathlib/Analysis/RCLike/Extend.lean,Mathlib/Geometry/Euclidean/Incenter.lean,Mathlib/Geometry/Manifold/LocalDiffeomorph.lean,Mathlib/Geometry/Manifold/MFDeriv/Atlas.lean,Mathlib/MeasureTheory/Function/ConditionalExpectation/Basic.lean,Mathlib/MeasureTheory/Function/ConditionalExpectation/CondexpL1.lean,Mathlib/MeasureTheory/Function/SimpleFuncDenseLp.lean,Mathlib/MeasureTheory/Integral/Bochner/L1.lean,Mathlib/MeasureTheory/Measure/FiniteMeasure.lean,Mathlib/NumberTheory/ModularForms/JacobiTheta/TwoVariable.lean,Mathlib/Probability/Distributions/Fernique.lean,Mathlib/Probability/Moments/CovarianceBilinDual.lean,Mathlib/Topology/Algebra/AffineSubspace.lean,Mathlib/Topology/Algebra/Algebra.lean,Mathlib/Topology/Algebra/ContinuousAffineEquiv.lean,Mathlib/Topology/Algebra/ContinuousAffineMap.lean,Mathlib/Topology/Algebra/Module/Alternating/Basic.lean,Mathlib/Topology/Algebra/Module/Alternating/Topology.lean,Mathlib/Topology/Algebra/Module/CharacterSpace.lean,Mathlib/Topology/Algebra/Module/Equiv.lean,Mathlib/Topology/Algebra/Module/LinearMap.lean,Mathlib/Topology/Algebra/Module/LinearMapPiProd.lean,Mathlib/Topology/Algebra/Module/Multilinear/Basic.lean,Mathlib/Topology/Algebra/Module/Multilinear/Topology.lean,Mathlib/Topology/Algebra/Module/PointwiseConvergence.lean,Mathlib/Topology/Algebra/Module/Star.lean,Mathlib/Topology/Algebra/Module/StrongTopology.lean,Mathlib/Topology/Algebra/Module/WeakDual.lean,Mathlib/Topology/ContinuousMap/Algebra.lean,Mathlib/Topology/ContinuousMap/Ideals.lean,Mathlib/Topology/Instances/TrivSqZeroExt.lean,Mathlib/Topology/VectorBundle/Basic.lean 66 5 ['eric-wieser', 'github-actions', 'kbuzzard', 'leanprover-radar', 'mathlib4-merge-conflict-bot'] nobody
68-27829
2 months ago
68-27830
68 days ago
2-81715
2 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 merge-conflict 311/0 Mathlib.lean,Mathlib/Analysis/Calculus/ArcLengthReparametrization.lean,Mathlib/MeasureTheory/Integral/IntervalIntegral/FundThmCalculus.lean,docs/references.bib,lake-manifest.json 5 53 ['SnirBroshi', 'github-actions', 'grunweg', 'j-loreaux', 'mathlib4-merge-conflict-bot', 'michael-novak-math'] j-loreaux
assignee:j-loreaux
68-17689
2 months ago
68-17690
68 days ago
6-71429
6 days
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 - [ ] depends on: #26332 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict large-import t-logic 529/8 Mathlib/Data/Rel.lean,Mathlib/ModelTheory/Definability.lean,Mathlib/ModelTheory/Semantics.lean,Mathlib/ModelTheory/Syntax.lean,scripts/noshake.json 5 8 ['Timeroot', 'github-actions', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot', 'staroperator'] nobody
67-55075
2 months ago
205-33028
205 days ago
3-3620
3 days
33435 astrainfinita
author:astrainfinita
 feat: algebra automorphisms of monoid algebras --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-algebra
label:t-algebra$
 53/3 Mathlib/Algebra/MonoidAlgebra/Basic.lean 1 2 ['github-actions', 'mathlib4-merge-conflict-bot'] kbuzzard
assignee:kbuzzard
62-37742
2 months ago
62-37743
62 days ago
13-16290
13 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
59-56606
2 months ago
59-56607
59 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 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 23 ['eric-wieser', 'gio256', 'github-actions', 'joneugster', 'kim-em', 'leanprover-community-bot-assistant', 'mathlib4-dependent-issues-bot'] joneugster
assignee:joneugster
59-56393
2 months ago
239-33533
239 days ago
88-84229
88 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
57-68175
1 month ago
159-73079
159 days ago
25-78230
25 days
32546 anishrajeev
author:anishrajeev
 feat(ModelTheory): Prove compactness of the type space Define the space of types and prove various topological properties of it (zero dimensional, totally separated, compact, baire). The goal is to formalize the proof of the Omitting Types Theorem - [ ] depends on: #32215 merge-conflict t-logic new-contributor 127/1 Mathlib.lean,Mathlib/ModelTheory/Topology/Types.lean,Mathlib/ModelTheory/Types.lean,Mathlib/Tactic/Linter/DirectoryDependency.lean 4 6 ['NoneMore', 'anishrajeev', 'github-actions', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] fpvandoorn
assignee:fpvandoorn
55-47554
1 month ago
95-50250
95 days ago
3-84208
3 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
53-47399
1 month ago
127-12444
127 days ago
74-62390
74 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 29 ['MrBrain295', 'Parcly-Taxel', 'Rida-Hamadani', 'github-actions', 'lambda-fairy', 'leanprover-community-bot-assistant'] kmill
assignee:kmill
45-9974
1 month ago
255-8198
255 days ago
72-50365
72 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
35-73828
1 month ago
255-10669
255 days ago
52-61657
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
32-41848
1 month ago
32-41849
32 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
30-18459
1 month ago
89-5848
89 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
29-73653
1 month ago
81-41478
81 days ago
0-2872
47 minutes
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 2/3 Mathlib/Data/Fin/Embedding.lean 1 3 ['github-actions', 'mathlib4-merge-conflict-bot', 'urkud'] nobody
29-53844
1 month ago
176-62312
176 days ago
18-38918
18 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
29-49570
1 month ago
29-49570
29 days ago
0-2935
48 minutes
16215 adomasbaliuka
author:adomasbaliuka
 feat(Tactic/Linter): lint unwanted unicode Add a text-based style linter that checks all unicode characters. - Only allow whitelisted characters, with a suggestion to add the flagged character to the whitelist - Some characters are specified to use emoji-variant or text-variant. The linter ensures these variant-selectors only appear in the correct places and provides an auto-fix to clean them up. --- Discussed at [Zulip](https://leanprover.zulipchat.com/#narrow/stream/287929-mathlib4/topic/Whitelist.20for.20Unicode.3F/near/448721083) The current proposal checks each character against a whitelist. There is also the question of what the whitelist should contain. A reasonable whitelist might be "all unicode currently in Mathlib" ∪ [Wikipedia/Mathematical_operators_and_symbols_in_Unicode](https://en.wikipedia.org/wiki/Mathematical_operators_and_symbols_in_Unicode) ∪ [EdAyers/mathlib3/docs/unicode.md](https://github.com/EdAyers/mathlib/blob/fb5c2ffe917049959597b0a93b872e91f4004922/docs/unicode.md). Currently implemented is a subset of this list closer to what's currently present in mathlib. - [x] depends on: #17068 - [x] depends on: #17116 - [x] depends on: #17129 (part 1 of this PR) - ~depends on #34719 (part 1 of this PR)~ - ~depends on: #17131 (part 2 of this PR)~ (obsolete) - [x] depends on: #34022 (part 2 of this PR) - Future note: @adomasbaliuka says: "we might add something to the Mathlib 4 docs about this as well?" [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-linter 462/15 Mathlib/GroupTheory/GroupExtension/Defs.lean,Mathlib/Tactic/Linter/TextBased.lean,Mathlib/Tactic/Linter/UnicodeLinter.lean,Mathlib/Tactic/Widget/Calc.lean,Mathlib/Tactic/Widget/CongrM.lean,Mathlib/Tactic/Widget/Conv.lean,Mathlib/Tactic/Widget/GCongr.lean,Mathlib/Topology/ContinuousFunction/Weierstrass.lean,test/LintStyle.lean 9 51 ['adomasbaliuka', 'eric-wieser', 'github-actions', 'grunweg', 'joneugster', 'mathlib-dependent-issues'] joneugster
assignee:joneugster
28-46085
1 month ago
537-68993
537 days ago
1-19055
1 day
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'] RemyDegenne
assignee:RemyDegenne
28-43752
1 month ago
70-36137
70 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
27-23698
27 days ago
27-23699
27 days ago
5-13758
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
27-23697
27 days ago
27-23697
27 days ago
4-79090
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
27-1331
27 days ago
27-1332
27 days ago
34-16498
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
26-67601
26 days ago
26-67602
26 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
21-84499
21 days ago
21-84499
21 days ago
30-23357
30 days
35555 JovanGerb
author:JovanGerb
 perf: add `AddMonoid` shortcut instance for linear maps The hierarchy of classes is such that `AddCommMonoid` is not a direct parent of `AddCommGroup`. This means that when unifying an instance that comes from `AddCommMonoid` with one that comes from `AddCommGroup`, we end up having to go through the shared parent `AddMonoid`. Hence, it can be beneficial to have a separately defined `AddMonoid` instance. It might be worth it to try to switch up the order of the parents of `AddCommGroup`/`CommGroup` in the `extends` clause, and see if that has beneficial effects. Though this will affect many things, and in particular won't interact well with the `backward.respectTransparency` mess that is going on at the moment. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict 23/7 Mathlib/Algebra/Module/LinearMap/Defs.lean,Mathlib/LinearAlgebra/Multilinear/Basic.lean,Mathlib/Topology/Algebra/Module/LinearMap.lean,Mathlib/Topology/Algebra/Module/Multilinear/Basic.lean 4 5 ['JovanGerb', 'github-actions', 'leanprover-radar', 'mathlib-merge-conflicts'] robin-carlier
assignee:robin-carlier
20-69620
20 days ago
20-69621
20 days ago
4-32369
4 days
34854 GrigorenkoPV
author:GrigorenkoPV
 chore(Combinatorics/Enumerative/Catalan): split into `Basic` & `Tree` --- Split off from #34853 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor merge-conflict 228/195 Mathlib.lean,Mathlib/Combinatorics/Enumerative/Catalan.lean,Mathlib/Combinatorics/Enumerative/Catalan/Basic.lean,Mathlib/Combinatorics/Enumerative/Catalan/Tree.lean,Mathlib/Combinatorics/Enumerative/DyckWord.lean,Mathlib/RingTheory/PowerSeries/Catalan.lean 6 5 ['SnirBroshi', 'github-actions', 'mathlib-merge-conflicts', 'vihdzp'] thorimur
assignee:thorimur
20-25754
20 days ago
20-25755
20 days ago
19-76299
19 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
17-34833
17 days ago
17-34833
17 days ago
38-12430
38 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
14-65414
14 days ago
214-50824
214 days ago
10-67838
10 days
36107 sgouezel
author:sgouezel
 chore: mark definitions outputting classes as `implicit_reducible` Definitions outputting classes are here to be used as instances somewhere. If they are not implicit-reducible, then this use as instance is likely to encounter issues for defeq at instance reducibility. This PR marks all class returning definitions of the library as implicit_reducible, using the linter of #36031 and iteration of a python script with manual tweaking. Marking setoids as implicit_reducible creates a performance issue (why is setoid a class, by the way?) so I kept some of them unchanged. I'm not sure that it makes sense to mark all class returning defs as implicit_reducible (setoids are a counterexample, but Fintype is also probably not very sensible). On a side note, many many things in category theory are classes but have defs that construct them, so many many changes of the PR are in category theory. I have no opinion on whether this is desirable as I don't know the design decisions in this corner of the library. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict 760/515 Mathlib/Algebra/Algebra/ZMod.lean,Mathlib/Algebra/BrauerGroup/Defs.lean,Mathlib/Algebra/Category/AlgCat/Symmetric.lean,Mathlib/Algebra/Category/FGModuleCat/Colimits.lean,Mathlib/Algebra/Category/FGModuleCat/Limits.lean,Mathlib/Algebra/Category/Grp/Abelian.lean,Mathlib/Algebra/Category/HopfAlgCat/Monoidal.lean,Mathlib/Algebra/Category/ModuleCat/Abelian.lean,Mathlib/Algebra/Category/ModuleCat/EpiMono.lean,Mathlib/Algebra/Category/ModuleCat/Monoidal/Basic.lean,Mathlib/Algebra/Category/ModuleCat/Presheaf/Sheafify.lean,Mathlib/Algebra/Category/Ring/LinearAlgebra.lean,Mathlib/Algebra/CharP/Invertible.lean,Mathlib/Algebra/CharP/MixedCharZero.lean,Mathlib/Algebra/DirectSum/Decomposition.lean,Mathlib/Algebra/Field/Equiv.lean,Mathlib/Algebra/Field/IsField.lean,Mathlib/Algebra/FreeMonoid/Basic.lean,Mathlib/Algebra/GCDMonoid/Basic.lean,Mathlib/Algebra/Homology/ComplexShapeSigns.lean,Mathlib/Algebra/Homology/Functor.lean,Mathlib/Algebra/Lie/Basic.lean,Mathlib/Algebra/Lie/Classical.lean,Mathlib/Algebra/Lie/Derivation/Basic.lean,Mathlib/Algebra/Lie/Extension.lean,Mathlib/Algebra/Lie/Free.lean,Mathlib/Algebra/Lie/NonUnitalNonAssocAlgebra.lean,Mathlib/Algebra/Module/GradedModule.lean,Mathlib/Algebra/Module/NatInt.lean,Mathlib/Algebra/Module/Submodule/Defs.lean,Mathlib/Algebra/Module/Torsion/Basic.lean,Mathlib/Algebra/Module/ZLattice/Basic.lean,Mathlib/Algebra/MonoidAlgebra/Module.lean,Mathlib/Algebra/Order/Archimedean/Basic.lean,Mathlib/Algebra/Order/Floor/Defs.lean,Mathlib/Algebra/Polynomial/Div.lean,Mathlib/Algebra/SkewMonoidAlgebra/Basic.lean,Mathlib/Algebra/Star/NonUnitalSubalgebra.lean,Mathlib/Algebra/Star/RingQuot.lean,Mathlib/AlgebraicGeometry/Artinian.lean,Mathlib/AlgebraicGeometry/Cover/Directed.lean,Mathlib/AlgebraicGeometry/FunctionField.lean,Mathlib/AlgebraicGeometry/Geometrically/Basic.lean,Mathlib/AlgebraicGeometry/Limits.lean,Mathlib/AlgebraicGeometry/LimitsOver.lean,Mathlib/AlgebraicGeometry/Morphisms/ClosedImmersion.lean,Mathlib/AlgebraicGeometry/Morphisms/Finite.lean,Mathlib/AlgebraicGeometry/Morphisms/QuasiCompact.lean,Mathlib/AlgebraicGeometry/Morphisms/QuasiSeparated.lean,Mathlib/AlgebraicGeometry/Morphisms/SchemeTheoreticallyDominant.lean,Mathlib/AlgebraicGeometry/Morphisms/UniversallyOpen.lean,Mathlib/AlgebraicGeometry/Normalization.lean,Mathlib/AlgebraicGeometry/ProjectiveSpectrum/Topology.lean,Mathlib/AlgebraicGeometry/Properties.lean,Mathlib/AlgebraicTopology/ModelCategory/Basic.lean,Mathlib/Analysis/AbsoluteValue/Equivalence.lean,Mathlib/Analysis/CStarAlgebra/CStarMatrix.lean,Mathlib/Analysis/CStarAlgebra/ContinuousFunctionalCalculus/Continuity.lean,Mathlib/Analysis/CStarAlgebra/ContinuousFunctionalCalculus/Integral.lean,Mathlib/Analysis/CStarAlgebra/ContinuousFunctionalCalculus/Range.lean,Mathlib/Analysis/CStarAlgebra/ContinuousMap.lean,Mathlib/Analysis/CStarAlgebra/Matrix.lean,Mathlib/Analysis/CStarAlgebra/Module/Defs.lean,Mathlib/Analysis/Calculus/FDeriv/Symmetric.lean,Mathlib/Analysis/Calculus/LogDeriv.lean,Mathlib/Analysis/Calculus/MeanValue.lean,Mathlib/Analysis/Calculus/SmoothSeries.lean,Mathlib/Analysis/Calculus/UniformLimitsDeriv.lean,Mathlib/Analysis/Complex/UpperHalfPlane/Metric.lean,Mathlib/Analysis/Distribution/SchwartzSpace/Basic.lean,Mathlib/Analysis/Distribution/TestFunction.lean,Mathlib/Analysis/InnerProductSpace/Basic.lean,Mathlib/Analysis/InnerProductSpace/Coalgebra.lean,Mathlib/Analysis/InnerProductSpace/Defs.lean,Mathlib/Analysis/InnerProductSpace/OfNorm.lean,Mathlib/Analysis/InnerProductSpace/TensorProduct.lean,Mathlib/Analysis/InnerProductSpace/TwoDim.lean,Mathlib/Analysis/LocallyConvex/WithSeminorms.lean,Mathlib/Analysis/Matrix/LDL.lean,Mathlib/Analysis/Matrix/Order.lean,Mathlib/Analysis/Matrix/PosDef.lean,Mathlib/Analysis/MellinTransform.lean,Mathlib/Analysis/Normed/Algebra/Exponential.lean,Mathlib/Analysis/Normed/Algebra/QuaternionExponential.lean,Mathlib/Analysis/Normed/Field/Basic.lean,Mathlib/Analysis/Normed/Group/AddTorsor.lean,Mathlib/Analysis/Normed/Module/Basic.lean,Mathlib/Analysis/Normed/Module/HahnBanach.lean,Mathlib/Analysis/Normed/Module/MultipliableUniformlyOn.lean,Mathlib/Analysis/Normed/Module/PiTensorProduct/InjectiveSeminorm.lean,Mathlib/Analysis/Normed/Ring/Basic.lean,Mathlib/Analysis/Normed/Unbundled/SpectralNorm.lean,Mathlib/Analysis/ODE/PicardLindelof.lean,Mathlib/Analysis/Quaternion.lean,Mathlib/Analysis/RCLike/Basic.lean,Mathlib/Analysis/SpecialFunctions/Complex/LogBounds.lean,Mathlib/Analysis/SpecialFunctions/ContinuousFunctionalCalculus/ExpLog/Basic.lean,Mathlib/Analysis/SpecialFunctions/Gamma/Deriv.lean,Mathlib/Analysis/SpecialFunctions/ImproperIntegrals.lean,Mathlib/CategoryTheory/Abelian/Basic.lean 472 5 ['github-actions', 'leanprover-radar', 'mathlib-merge-conflicts', 'sgouezel'] nobody
11-22109
11 days ago
11-77740
11 days ago
12-37385
12 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
10-64519
10 days ago
585-42689
585 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
10-64507
10 days ago
270-64246
270 days ago
91-69159
91 days
35900 matthewjasper
author:matthewjasper
 chore: Fix non-defeq diamonds on OrderDual This only makes changes to fix the diamonds, rather than the general defeq abuse with `OrderDual`. --- - [x] depends on: #35995 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor t-order merge-conflict 213/116 Mathlib/Algebra/Field/Basic.lean,Mathlib/Algebra/MonoidAlgebra/Degree.lean,Mathlib/Algebra/Order/Group/Synonym.lean,Mathlib/Algebra/Order/GroupWithZero/Action/Synonym.lean,Mathlib/Algebra/Order/GroupWithZero/Synonym.lean,Mathlib/Algebra/Order/Module/Defs.lean,Mathlib/Algebra/Order/Module/Synonym.lean,Mathlib/Algebra/Order/Ring/Cast.lean,Mathlib/Algebra/Order/Ring/Synonym.lean,Mathlib/Analysis/Convex/Basic.lean,Mathlib/Analysis/Normed/Group/Constructions.lean,Mathlib/Data/Nat/Cast/Synonym.lean,Mathlib/Order/Lattice.lean 13 5 ['github-actions', 'mathlib-dependent-issues', 'mathlib-merge-conflicts'] nobody
10-57729
10 days ago
14-19747
14 days ago
16-6095
16 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. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-set-theory merge-conflict 384/0 Mathlib.lean,Mathlib/SetTheory/Cardinal/Arithmetic.lean,Mathlib/SetTheory/Cardinal/Basic.lean,Mathlib/SetTheory/Cardinal/DeltaSystem.lean,Mathlib/SetTheory/Cardinal/Pigeonhole.lean,docs/references.bib 6 2 ['github-actions', 'mathlib-merge-conflicts'] alreadydone
assignee:alreadydone
7-34949
7 days ago
22-43543
22 days ago
22-44397
22 days
35435 WenrongZou
author:WenrongZou
 feat(RingTheory/MvPowerSeries): toMvPowerSeries and rename --- Some APIs about `rename` and `toMvPowerSeries`. This follows the inspiration in `Polynomial.toMvPolynomial` and `MvPolynomial.rename`. I will add more theorems related to these in the next PR. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-ring-theory merge-conflict 325/4 Mathlib.lean,Mathlib/RingTheory/MvPowerSeries/Rename.lean,Mathlib/RingTheory/MvPowerSeries/Substitution.lean,Mathlib/RingTheory/PowerSeries/Substitution.lean 4 7 ['BryceT233', 'WenrongZou', 'github-actions', 'mariainesdff', 'mathlib-merge-conflicts'] mariainesdff
assignee:mariainesdff
6-344
6 days ago
27-80187
27 days ago
27-80575
27 days
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. --- - [ ] depends on: #36013 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) brownian merge-conflict 313/0 Mathlib.lean,Mathlib/Data/Set/Accumulate.lean,Mathlib/Data/Set/Dissipate.lean,Mathlib/MeasureTheory/PiSystem.lean,Mathlib/Topology/Compactness/CompactSystem.lean 5 3 ['github-actions', 'mathlib-dependent-issues', 'mathlib-merge-conflicts'] nobody
6-332
6 days ago
11-29345
11 days ago
11-29300
11 days
36575 dagurtomas
author:dagurtomas
 modifications to #35871 --- So this doesn't appear on the queue: - [ ] depends on: #35871 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-category-theory merge-conflict 47/51 Mathlib/AlgebraicGeometry/Morphisms/Finite.lean,Mathlib/AlgebraicGeometry/Morphisms/FlatDescent.lean,Mathlib/CategoryTheory/Limits/Shapes/Pullback/IsPullback/Basic.lean,Mathlib/CategoryTheory/MorphismProperty/Basic.lean,Mathlib/CategoryTheory/MorphismProperty/Limits.lean 5 4 ['github-actions', 'mathlib-dependent-issues', 'mathlib-merge-conflicts'] nobody
3-56264
3 days ago
4-13458
4 days ago
0-11
11 seconds
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
2-49210
2 days ago
117-80285
117 days ago
114-38193
114 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
0-77755
21 hours ago
23-71281
23 days ago
27-65714
27 days
36316 JovanGerb
author:JovanGerb
 chore: import `Type*` in `Mathlib.Init` The implementation of `Type*` is very short, so I've put its minimal dependencies in the same file, `Mathlib.Tactic.TypeStar`, and imported this in `Mathlib.Init`. This allows us to get rid of many explicit imports of this file, and lets it be available everywhere in mathlib. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) large-import maintainer-merge merge-conflict 58/87 Mathlib/Algebra/Notation.lean,Mathlib/Algebra/Notation/Defs.lean,Mathlib/Algebra/Notation/Lemmas.lean,Mathlib/Control/Functor.lean,Mathlib/Data/Bool/AllAny.lean,Mathlib/Data/Bracket.lean,Mathlib/Data/Int/Cast/Pi.lean,Mathlib/Data/Int/Init.lean,Mathlib/Data/List/Lookmap.lean,Mathlib/Data/List/ModifyLast.lean,Mathlib/Data/List/TFAE.lean,Mathlib/Data/Nat/Init.lean,Mathlib/Data/Num/Basic.lean,Mathlib/Data/Option/Defs.lean,Mathlib/Data/Option/NAry.lean,Mathlib/Data/Ordering/Basic.lean,Mathlib/Data/Prod/PProd.lean,Mathlib/Data/Rat/Init.lean,Mathlib/Data/Tree/Basic.lean,Mathlib/Data/Vector3.lean,Mathlib/Init.lean,Mathlib/Lean/Elab/Term.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/Nonempty.lean,Mathlib/Logic/Nontrivial/Defs.lean,Mathlib/Order/Bounds/Defs.lean,Mathlib/Order/Defs/LinearOrder.lean,Mathlib/Order/Defs/PartialOrder.lean,Mathlib/Order/Notation.lean,Mathlib/Tactic/Basic.lean,Mathlib/Tactic/CategoryTheory/CategoryStar.lean,Mathlib/Tactic/FunProp/Mor.lean,Mathlib/Tactic/GCongr/Core.lean,Mathlib/Tactic/Inhabit.lean,Mathlib/Tactic/Linter/DirectoryDependency.lean,Mathlib/Tactic/MkIffOfInductiveProp.lean,Mathlib/Tactic/TypeStar.lean,MathlibTest/BasicFiles/Init.lean,MathlibTest/BasicFiles/TacticBasic.lean,MathlibTest/ImplicitUniverses.lean 44 5 ['SnirBroshi', 'github-actions', 'j-loreaux', 'mathlib-merge-conflicts'] j-loreaux
assignee:j-loreaux
0-77749
21 hours ago
9-54855
9 days ago
9-58178
9 days
35518 kim-em
author:kim-em
 chore: forbid prime (') in filenames, rename LinearCombination' This PR renames `Mathlib/Tactic/LinearCombination'.lean` to `LinearCombinationPrime.lean` (and the corresponding test file), and adds a lint check to `modulesOSForbidden` to prevent future files with prime/apostrophe characters in their names. The `'` character in filenames causes shell escaping issues in scripts (any `find ... -name '*.lean'` or similar pattern needs careful quoting to handle these files correctly). 🤖 Prepared with Claude Code file-removed t-meta merge-conflict LLM-generated 13/8 Mathlib.lean,Mathlib/Tactic.lean,Mathlib/Tactic/LinearCombinationPrime.lean,Mathlib/Tactic/Linter/TextBased.lean,Mathlib/Tactic/Linter/UnusedTactic.lean,MathlibTest/linear_combination_prime.lean 6 7 ['eric-wieser', 'euprunin', 'github-actions', 'kim-em', 'mathlib-merge-conflicts'] adamtopaz
assignee:adamtopaz
0-54095
15 hours ago
23-75208
23 days ago
23-78349
23 days
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. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-data merge-conflict 433/475 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/PartENat.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/Deprecated/Estimator.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 82 30 ['JovanGerb', 'SnirBroshi', 'github-actions', 'mathlib-merge-conflicts', 'vihdzp'] vihdzp
assignee:vihdzp
0-28314
7 hours ago
1-11279
1 day ago
9-85561
9 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. --- [![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/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/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 2 ['github-actions', 'mathlib-merge-conflicts'] nobody
0-28307
7 hours ago
0-55188
15 hours ago
0-55186
15 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
578-71539
1 year ago
609-32121
609 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
574-56448
1 year ago
609-62670
609 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 90/0 Mathlib/Data/Nat/PartENat.lean 1 3 ['erdOne', 'github-actions', 'urkud'] nobody
561-68338
1 year ago
612-75860
612 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
561-31283
1 year ago
592-76942
592 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
538-42342
1 year ago
626-31289
626 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
530-38320
1 year ago
545-66394
545 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
530-38320
1 year ago
545-66395
545 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
530-38319
1 year ago
545-62145
545 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
520-84870
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
512-60977
1 year ago
661-43075
661 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
496-2853
1 year ago
496-2853
496 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
493-45374
1 year ago
529-34686
529 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
488-84206
1 year ago
502-70394
502 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
459-20223
1 year ago
485-68005
485 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
425-42235
1 year ago
518-33805
518 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
424-61321
1 year ago
545-72482
545 days ago
9-13962
9 days
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
424-27240
1 year ago
464-26853
464 days ago
33-8818
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
420-74820
1 year ago
420-74820
420 days ago
69-24210
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
419-48899
1 year ago
425-16300
425 days ago
27-52347
27 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
412-66247
1 year ago
412-66247
412 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
400-23557
1 year ago
406-74474
406 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
395-57656
1 year ago
402-69278
402 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
390-26427
1 year ago
390-26427
390 days ago
13-33168
13 days
14060 YnirPaz
author:YnirPaz
 feat(SetTheory/Ordinal/Clubs): define club sets and prove basic properties Create a file where club sets are defined and their basic properties are proven. I also created a new recursion principle for ordinals, bounded recursion. --- - [ ] depends on: #19189 [![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 315/3 Mathlib.lean,Mathlib/Order/SuccPred/Limit.lean,Mathlib/SetTheory/Cardinal/Cofinality.lean,Mathlib/SetTheory/Ordinal/Arithmetic.lean,Mathlib/SetTheory/Ordinal/Club.lean,Mathlib/SetTheory/Ordinal/Topology.lean 6 93 ['YaelDillies', 'YnirPaz', 'alreadydone', 'dupuisf', 'github-actions', 'mathlib4-dependent-issues-bot', 'vihdzp', 'zeramorphic'] nobody
378-8678
1 year ago
436-31162
436 days ago
93-453
93 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
376-52268
1 year ago
376-52268
376 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
368-48094
1 year ago
551-51323
551 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
349-83493
11 months ago
375-26049
375 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
344-78482
11 months ago
538-55853
538 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
341-64402
11 months 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
341-60670
11 months ago
341-60671
341 days ago
57-47357
57 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
340-63398
11 months ago
415-55598
415 days ago
5-6208
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
333-34596
10 months ago
416-45064
416 days ago
8-45680
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
333-30728
10 months ago
413-21701
413 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
317-81567
10 months 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
315-27846
10 months ago
584-51031
584 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
309-73425
10 months ago
309-73425
309 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
293-45766
9 months ago
293-45768
293 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
283-17719
9 months ago
666-45372
666 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
276-10272
9 months ago
414-48253
414 days ago
27-62333
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
255-7033
8 months ago
287-68550
287 days ago
6-44784
6 days
10541 xgenereux
author:xgenereux
 feat(Algebra/SkewMonoidAlgebra/Basic): add SkewMonoidAlgebra # Skew Monoid algebras This file presents a skewed version of `Mathlib.Algebra.MonoidAlgebra.Basic`. ## Definition We define `SkewMonoidAlgebra k G := G →₀ k` attached with a skewed convolution product. Here, the product of two elements `f g : SkewMonoidAlgebra k G` is the finitely supported function whose value at `a` is the sum of `f x * (x • g y)` over all pairs `x, y` such that `x * y = a`. This will be used in a later PR to define skew polynomial rings. Co-authored-by: María Inés de Frutos Fernández <[mariaines.dff@gmail.com](mailto:mariaines.dff@gmail.com)> --- - [x] depends on: #15878 - [x] depends on: #19084 - [x] depends on: #22078 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict WIP t-algebra new-contributor
label:t-algebra$
 1624/0 Mathlib.lean,Mathlib/Algebra/Group/InjSurj.lean,Mathlib/Algebra/SkewMonoidAlgebra/Basic.lean,Mathlib/Algebra/SkewMonoidAlgebra/Lift.lean 4 105 ['AntoineChambert-Loir', 'YaelDillies', 'eric-wieser', 'fpvandoorn', 'github-actions', 'mariainesdff', 'mathlib4-dependent-issues-bot', 'mattrobball', 'xgenereux'] AntoineChambert-Loir
assignee:AntoineChambert-Loir
250-62511
8 months ago
577-66077
577 days ago
179-14511
179 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
228-65573
7 months ago
765-58499
765 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
224-71764
7 months ago
255-7033
255 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
223-73785
7 months ago
496-82354
496 days ago
0-1609
26 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
218-77326
7 months ago
419-52141
419 days ago
9-59130
9 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 11 ['faenuccio', 'ggranberry', 'github-actions'] faenuccio
assignee:faenuccio
215-69196
7 months ago
363-54078
363 days ago
0-1302
21 minutes
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
212-67010
7 months ago
426-58980
426 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
210-2422
6 months ago
212-74351
212 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
207-38930
6 months ago
430-9489
430 days ago
43-22586
43 days
28095 Equilibris
author:Equilibris
 Univ generic corec Draft PR: Adding variable universe corecursor for PFunctor --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict new-contributor 321/70 Mathlib/Data/PFunctor/Multivariate/Basic.lean,Mathlib/Data/PFunctor/Multivariate/M.lean,Mathlib/Data/TypeVec.lean 3 7 ['Equilibris', 'alexkeizer', 'github-actions', 'mathlib4-merge-conflict-bot'] nobody
206-24192
6 months ago
unknown
0-0
0 seconds
28150 Equilibris
author:Equilibris
 chore: clean up proofs typevec proofs While adding variable universe corecs I found a lot of theorems in typevec that could do with a bit of a clean-up --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-data new-contributor 24/26 Mathlib/Data/TypeVec.lean 1 7 ['Equilibris', 'alexkeizer', 'github-actions', 'mathlib4-merge-conflict-bot'] nobody
206-24191
6 months ago
206-24192
206 days ago
13-49738
13 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
206-3511
6 months ago
228-65833
228 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
205-51743
6 months ago
228-65834
228 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
205-51504
6 months ago
234-49201
234 days ago
0-237
3 minutes
28279 Equilibris
author:Equilibris
 feat: univ generic W A simple change making `W.ind`'s motive universe generic. --- A theorem `w_ind_eq` will now be needed, but this will depend on getting `dcongr_heq` merged, and hence I will do this in a separate PR. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-data new-contributor 16/21 Mathlib/Data/PFunctor/Multivariate/W.lean 1 8 ['Equilibris', 'alexkeizer', 'github-actions'] nobody
197-36713
6 months ago
unknown
0-0
0 seconds
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
189-22872
6 months ago
189-53975
189 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
188-57774
6 months ago
188-57775
188 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
186-53496
6 months ago
277-61334
277 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
173-56974
5 months ago
185-61337
185 days ago
0-1498
24 minutes
29657 jcreinhold
author:jcreinhold
 feat(CategoryTheory/MarkovCategory): add Markov categories This PR adds Markov categories to the category theory library. A Markov category is a symmetric monoidal category where every object has canonical copy and delete morphisms that form commutative comonoids. ## What this gives mathlib In a Markov category, morphisms model probabilistic processes. The copy morphism `X → X ⊗ X` creates perfect correlation (both outputs always equal). The delete morphism `X → I` marginalizes (sums/integrates out variables). This structure captures probability theory categorically. The same theorem proves results for: - Finite probability (stochastic matrices) - Measure theory (Markov kernels) - Kleisli categories of probability monads Fritz (2020) used this to prove categorical versions of Fisher-Neyman, Basu's theorem, and other core statistics results. ## Implementation - `MarkovCategory`: Extends `SymmetricCategory` with canonical comonoid structure - `copyMor X : X ⟶ X ⊗ X` and `delMor X : X ⟶ I` for each object - Coherence axioms: commutativity, counitality, coassociativity - Compatibility with tensor products Key design point: The comonoid structure is canonical (fields of the typeclass), not chosen. This matches the probability interpretation where there's exactly one way to copy/marginalize. ## Examples included 1. Cartesian categories: Every cartesian monoidal category forms a Markov category where copy is the diagonal `x ↦ (x,x)` and delete is the terminal morphism. All morphisms are deterministic. 2. FinStoch: Objects are finite types. Morphisms are stochastic matrices (rows sum to 1). This models finite probability spaces with the usual matrix multiplication for composition. ## Scope and review notes This PR provides the basic structure only. Future PRs would add: - Conditional independence - Sufficient statistics - Connection to measure-theoretic probability - More examples (Kleisli categories, Gaussian categories) I'm neither an expert in this material nor in Lean; I've only read a few papers on Markov categories and have gone through tutorial material in Lean. Please review for mathematical correctness and idiomatic Lean. I kept this PR small to check if mathlib wants this addition and to ensure it meets repository standards. ## Why add this now Markov categories provide a useful abstraction level for probability in type theory. Adding it to mathlib enables future work on categorical probability and statistics. In particular, I'm working on a probabilistic programming library and would like to write some proofs using these constructs. ## References - Fritz, T. (2020). [A synthetic approach to Markov kernels, conditional independence and theorems on sufficient statistics](https://arxiv.org/abs/1908.07021). *Advances in Mathematics*, 370, 107239. - Cho, K., & Jacobs, B. (2019). [Disintegration and Bayesian inversion via string diagrams](https://arxiv.org/abs/1709.00322). *Mathematical Structures in Computer Science*, 29(7), 938-971. --- All definitions include docstrings. The PR has tests for the core functionality. [![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 2414/7 Mathlib.lean,Mathlib/CategoryTheory/Bicategory/Monad/Basic.lean,Mathlib/CategoryTheory/CopyDiscardCategory/Basic.lean,Mathlib/CategoryTheory/CopyDiscardCategory/Deterministic.lean,Mathlib/CategoryTheory/MarkovCategory/Basic.lean,Mathlib/CategoryTheory/MarkovCategory/Cartesian.lean,Mathlib/CategoryTheory/MarkovCategory/FinStoch/Basic.lean,Mathlib/CategoryTheory/MarkovCategory/FinStoch/Braided.lean,Mathlib/CategoryTheory/MarkovCategory/FinStoch/CopyDiscard.lean,Mathlib/CategoryTheory/MarkovCategory/FinStoch/Markov.lean,Mathlib/CategoryTheory/MarkovCategory/FinStoch/Monoidal.lean,Mathlib/CategoryTheory/Monoidal/Bimon_.lean,Mathlib/CategoryTheory/Monoidal/CommComon_.lean,Mathlib/CategoryTheory/Monoidal/Comon_.lean,MathlibTest/CategoryTheory/MarkovCategory.lean,docs/references.bib 16 28 ['github-actions', 'jcreinhold', 'joelriou', 'mathlib4-merge-conflict-bot'] nobody
172-57805
5 months ago
177-63929
177 days ago
0-10638
2 hours
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
168-72018
5 months ago
269-81418
269 days ago
0-47289
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
163-37764
5 months ago
163-37764
163 days ago
46-26438
46 days
29926 jcreinhold
author:jcreinhold
 feat(CategoryTheory/MarkovCategory): add basic finite stochastic matrices definitions to Markov category This PR introduces FinStoch, the category of finite stochastic matrices, as a concrete example of a Markov category. This PR builds on #29925, #29939, and #29919 and was split up from #29657. ## Main additions ### 1. Core definitions (`FinStoch/Basic.lean`) - `StochasticMatrix m n`: Matrices where rows sum to 1, representing conditional probabilities P(j|i) - `FinStoch`: The category with finite types as objects and stochastic matrices as morphisms - `DetMorphism`: Deterministic matrices (exactly one 1 per row) with their underlying functions - Composition: Matrix multiplication preserves row-stochasticity via the Chapman-Kolmogorov equation Key design choices: - Row-stochastic convention: entry (i,j) is P(output=j | input=i) - Deterministic morphisms tracked separately for structural isomorphisms ### 2. Monoidal structure (`FinStoch/Monoidal.lean`) Implements tensor products modeling independent parallel processes: - Tensor on objects: Cartesian product of finite types - Tensor on morphisms: Kronecker product P((j₁,j₂)|(i₁,i₂)) = P(j₁|i₁) × P(j₂|i₂) - Structural morphisms: Associator, unitors use deterministic permutations - Coherence**: Pentagon and triangle identities verified computationally ## Mathematical significance FinStoch provides the canonical example of a Markov category: - Morphisms: Stochastic matrices/Markov chains - Composition: Chapman-Kolmogorov equation for multi-step transitions - Tensor: Independent parallel processes This models finite probability spaces categorically, where: - Objects represent sample spaces - Morphisms represent probabilistic transitions - Tensor products model independence ## References Fritz (2020) - [ ] depends on: #29925 merge-conflict t-category-theory new-contributor 1437/0 Mathlib.lean,Mathlib/CategoryTheory/CopyDiscardCategory/Basic.lean,Mathlib/CategoryTheory/CopyDiscardCategory/Deterministic.lean,Mathlib/CategoryTheory/MarkovCategory/Basic.lean,Mathlib/CategoryTheory/MarkovCategory/Cartesian.lean,Mathlib/CategoryTheory/MarkovCategory/FinStoch/Basic.lean,Mathlib/CategoryTheory/MarkovCategory/FinStoch/Monoidal.lean,MathlibTest/CategoryTheory/MarkovCategory.lean,docs/references.bib 9 4 ['github-actions', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
157-48219
5 months ago
unknown
0-0
0 seconds
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
157-47069
5 months ago
547-74618
547 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
147-57319
4 months ago
147-57319
147 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
146-20851
4 months ago
146-20851
146 days ago
148-3338
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
144-44283
4 months ago
144-44351
144 days ago
0-83
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
139-76722
4 months ago
155-51398
155 days ago
47-58551
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
139-68452
4 months ago
160-51081
160 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
139-68450
4 months ago
160-48950
160 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
133-67973
4 months ago
133-67973
133 days ago
41-53612
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
133-1103
4 months ago
133-1103
133 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
130-47771
4 months ago
251-49141
251 days ago
0-267
4 minutes
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
124-10762
4 months ago
163-75828
163 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
119-27894
3 months ago
538-55282
538 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
118-44135
3 months ago
464-7665
464 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
117-81992
3 months ago
801-20487
801 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
117-81728
3 months ago
567-73814
567 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
117-81726
3 months ago
538-56862
538 days ago
26-40037
26 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
117-81597
3 months ago
593-47828
593 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
117-81443
3 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
117-81441
3 months ago
496-46844
496 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
117-81303
3 months ago
315-27832
315 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
117-81163
3 months ago
344-65118
344 days ago
50-8745
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
117-81157
3 months ago
364-75170
364 days ago
20-81771
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
117-81148
3 months ago
384-28750
384 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
117-81135
3 months ago
340-63649
340 days ago
28-59574
28 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
117-80982
3 months ago
203-79563
203 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
117-80833
3 months ago
260-17996
260 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 `variation μ = μ`. Co-authored-by: @yoh-tanimoto - [ ] depends on: #26160 --- [![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-measure-probability 467/0 Mathlib.lean,Mathlib/MeasureTheory/VectorMeasure/Variation/Defs.lean,Mathlib/MeasureTheory/VectorMeasure/Variation/Lemmas.lean 3 3 ['github-actions', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
117-80644
3 months ago
254-75599
254 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 merge-conflict awaiting-author t-analysis 468/0 Mathlib.lean,Mathlib/Analysis/Calculus/FDeriv/Partial.lean,Mathlib/Analysis/Normed/Operator/BoundedLinearMaps.lean 3 21 ['YaelDillies', 'agjftucker', 'github-actions', 'igorkhavkine', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot', 'sgouezel'] sgouezel
assignee:sgouezel
117-80621
3 months ago
214-42611
214 days ago
44-77065
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
117-80473
3 months ago
233-37831
233 days ago
25-5689
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
117-80468
3 months ago
146-69278
146 days ago
62-14616
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
117-80431
3 months ago
244-68040
244 days ago
0-287
4 minutes
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
117-80276
3 months ago
228-51439
228 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
117-80274
3 months ago
227-26101
227 days ago
0-5814
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
117-80142
3 months ago
117-80143
117 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
117-80128
3 months ago
212-33956
212 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
117-79989
3 months ago
117-79990
117 days ago
71-37436
71 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
117-79355
3 months ago
117-79356
117 days ago
54-85998
54 days
30230 CoolRmal
author:CoolRmal
 feat(MeasureTheory): Basic properties of the integral against a vector measure with a bilinear form. Create a folder named Integral in the folder about vector measures. Define the integral of a function against a vector measure with a bilinear form, and prove that integral is a linear operator on functions, bilinear forms, and vector measures, respectively. Several useful lemmas are added into the file about variations of a vector measure (e.g. triangle inequality). --- - [ ] depends on: #28499 [![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-measure-probability 1353/0 Mathlib.lean,Mathlib/MeasureTheory/VectorMeasure/Basic.lean,Mathlib/MeasureTheory/VectorMeasure/Integral/Basic.lean,Mathlib/MeasureTheory/VectorMeasure/Integral/L1.lean,Mathlib/MeasureTheory/VectorMeasure/Variation/Defs.lean,Mathlib/MeasureTheory/VectorMeasure/Variation/Lemmas.lean 6 3 ['github-actions', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
117-79186
3 months ago
unknown
0-0
0 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
117-76187
3 months ago
561-69301
561 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
label:t-algebra$
 1/0 Mathlib/Algebra/Group/Commutator.lean 1 2 ['github-actions', 'grunweg'] nobody
117-54062
3 months ago
123-60513
123 days ago
0-1762
29 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
117-53203
3 months ago
747-20648
747 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
117-53050
3 months ago
480-59929
480 days ago
15-38473
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
117-52987
3 months ago
453-70236
453 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
117-52960
3 months ago
410-31774
410 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
117-52843
3 months ago
329-51778
329 days ago
8-27909
8 days
26881 emo916math
author:emo916math
 feat(Analysis/Calculus/Deriv/Star): a formula for `deriv (conj ∘ f ∘ conj)` Added a lemma that `deriv (conj ∘ f ∘ conj) = conj ∘ deriv f ∘ conj`, proved by cases on whether the derivative mathematically exists or not. This PR replaces [#26805](https://github.com/leanprover-community/mathlib4/pull/26805); see discussion there. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) awaiting-author t-analysis new-contributor 50/2 Mathlib/Analysis/Calculus/Deriv/Star.lean 1 15 ['emo916math', 'github-actions', 'j-loreaux', 'kckennylau'] j-loreaux
assignee:j-loreaux
117-52609
3 months ago
220-52357
220 days ago
31-70575
31 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
117-52526
3 months ago
146-39661
146 days ago
74-62001
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
117-52505
3 months ago
218-5172
218 days ago
0-454
7 minutes
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
117-52394
3 months ago
184-53464
184 days ago
0-1063
17 minutes
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
117-52306
3 months ago
208-26809
208 days ago
0-581
9 minutes
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
117-38702
3 months ago
117-38702
117 days ago
138-3922
138 days
29434 ntapiam
author:ntapiam
 feat(NonAssoc/LieAdmissible): prove every ring/algebra is LieAdmissible -awaiting-author t-algebra new-contributor
label:t-algebra$
 27/6 Mathlib/Algebra/NonAssoc/LieAdmissible/Defs.lean 1 2 ['github-actions', 'mathlib4-merge-conflict-bot'] nobody
115-37012
3 months ago
115-36164
115 days ago
0-1498
24 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
114-60851
3 months ago
114-60440
114 days ago
31-49241
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
111-8493
3 months ago
111-63905
111 days ago
6-25774
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
108-81273
3 months ago
108-81273
108 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
108-32414
3 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
101-53250
3 months ago
114-20063
114 days ago
0-34649
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
101-40012
3 months ago
109-83555
109 days ago
39-49182
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
101-39888
3 months ago
110-62314
110 days ago
16-82714
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
101-35490
3 months ago
283-61834
283 days ago
29-59355
29 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 391/0 Mathlib.lean,Mathlib/Combinatorics/DiHypergraph/Basic.lean 2 2 ['github-actions', 'mathlib4-merge-conflict-bot'] b-mehta
assignee:b-mehta
98-62927
3 months ago
98-62880
98 days ago
57-69412
57 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
98-60723
3 months ago
98-60723
98 days ago
18-38983
18 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 merge-conflict 375/0 Mathlib.lean,Mathlib/Combinatorics/Hypergraph/Basic.lean 2 54 ['b-mehta', 'espottesmith', 'github-actions', 'jt496', 'lauramonk', 'mathlib4-merge-conflict-bot'] b-mehta
assignee:b-mehta
96-80336
3 months ago
98-62878
98 days ago
76-58243
76 days
32869 felixpernegger
author:felixpernegger
 feat(RingTheory): lemmas around ```Ring.choose``` Various small lemmas around Ring.choose. In particular this should cover all statements from .Data.Nat.Choose.Basic which have a meaningful generalization to arbitrary rings. new-contributor t-ring-theory 170/0 Mathlib/RingTheory/Binomial.lean,Mathlib/RingTheory/Polynomial/Pochhammer.lean 2 1 ['github-actions'] nobody
92-75588
3 months ago
92-85123
92 days ago
0-1503
25 minutes
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
92-52829
3 months ago
92-52829
92 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
87-76231
2 months ago
87-76271
87 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
87-24600
2 months ago
87-24600
87 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
86-56797
2 months ago
146-21365
146 days ago
54-75088
54 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 31 ['D-Thomine', 'github-actions', 'leanprover-community-bot-assistant', 'lua-vr', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot', 'sgouezel', 'urkud'] sgouezel
assignee:sgouezel
84-79220
2 months ago
90-37138
90 days ago
98-51478
98 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
84-3062
2 months ago
84-8347
84 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
84-2954
2 months ago
84-8121
84 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
84-2870
2 months ago
84-7933
84 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
84-542
2 months ago
84-543
84 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
84-540
2 months ago
84-541
84 days ago
0-1431
23 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
84-539
2 months ago
84-540
84 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
84-537
2 months ago
84-538
84 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
84-534
2 months ago
84-537
84 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
84-533
2 months ago
84-534
84 days ago
0-2387
39 minutes
33178 gw90
author:gw90
 feat(Analysis/CStarAlgebra/Spectrum): Adding lemmas that the CStarAlgebra norm equals the square root of the spectral radius of star a * a Adds lemmas that the ||a||^2_A=sqrt(spectralRadius C (star a * a)). I think it would be helpful to have these lemmas available in Mathlib. It'll help with some of the other things I'm working on. Feel free to move them to a different file or rename them as you see fit. new-contributor t-analysis awaiting-author 24/0 Mathlib/Analysis/CStarAlgebra/Spectrum.lean 1 15 ['github-actions', 'gw90', 'themathqueen', 'vihdzp'] nobody
83-38801
2 months ago
85-14420
85 days ago
0-15209
4 hours
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
80-29019
2 months ago
103-32476
103 days ago
3-49892
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
79-45671
2 months ago
79-45671
79 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
79-38621
2 months ago
79-38621
79 days ago
5-82139
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
73-66812
2 months ago
73-66812
73 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
72-33736
2 months ago
72-33737
72 days ago
0-60133
16 hours
22657 Xmask19
author:Xmask19
 feat: a graph is maximally acyclic iff it is a tree --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-combinatorics new-contributor 86/0 Mathlib/Combinatorics/SimpleGraph/Acyclic.lean 1 8 ['Rida-Hamadani', 'SnirBroshi', 'b-mehta', 'github-actions', 'grunweg', 'mathlib4-merge-conflict-bot'] b-mehta
assignee:b-mehta
72-26829
2 months ago
342-56148
342 days ago
21-77121
21 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
70-36734
2 months ago
517-83971
517 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 merge-conflict 311/0 Mathlib.lean,Mathlib/Analysis/Calculus/ArcLengthReparametrization.lean,Mathlib/MeasureTheory/Integral/IntervalIntegral/FundThmCalculus.lean,docs/references.bib,lake-manifest.json 5 53 ['SnirBroshi', 'github-actions', 'grunweg', 'j-loreaux', 'mathlib4-merge-conflict-bot', 'michael-novak-math'] j-loreaux
assignee:j-loreaux
68-17689
2 months ago
68-17690
68 days ago
6-71429
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
67-55234
2 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
67-47040
2 months ago
67-47040
67 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 [ ] depends on: #30141 --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-topology new-contributor merge-conflict 83/1 Mathlib/Topology/Baire/NonMeagre.lean,Mathlib/Topology/GDelta/Basic.lean 2 2 ['github-actions', 'mathlib4-merge-conflict-bot'] nobody
66-56724
2 months ago
165-28151
165 days ago
0-1020
17 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 28 ['0xTerencePrime', 'ADedecker', 'github-actions', 'j-loreaux'] ADedecker
assignee:ADedecker
63-39808
2 months ago
63-40029
63 days ago
22-22665
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
62-4393
2 months ago
62-1021
62 days ago
0-3444
57 minutes
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
59-58139
2 months ago
59-66661
59 days ago
93-10641
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
57-68219
1 month ago
195-13603
195 days ago
0-396
6 minutes
32039 HugLycan
author:HugLycan
 feat(Tactic/Positivity): handle non-zeroness in non-orders --- WIP... [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) WIP new-contributor t-meta merge-conflict 618/163 Mathlib/Algebra/Order/AbsoluteValue/Basic.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/Module/Algebra.lean,Mathlib/Tactic/Positivity/Basic.lean,Mathlib/Tactic/Positivity/Core.lean,Mathlib/Tactic/Positivity/Finset.lean,Mathlib/Tactic/Positivity/test_Basic.lean 10 3 ['github-actions', 'mathlib4-merge-conflict-bot'] nobody
56-74673
1 month ago
112-75445
112 days ago
0-16
16 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'] dagurtomas
assignee:dagurtomas
56-54085
1 month ago
63-33615
63 days ago
16-55121
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 blocked-by-other-PR merge-conflict new-contributor 160/1 Mathlib.lean,Mathlib/ModelTheory/Topology/Types.lean,Mathlib/ModelTheory/Types.lean,Mathlib/Tactic/Linter/DirectoryDependency.lean 4 8 ['NoneMore', 'anishrajeev', 'github-actions', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot', 'tb65536'] nobody
55-47604
1 month ago
63-61428
63 days ago
10-38484
10 days
32546 anishrajeev
author:anishrajeev
 feat(ModelTheory): Prove compactness of the type space Define the space of types and prove various topological properties of it (zero dimensional, totally separated, compact, baire). The goal is to formalize the proof of the Omitting Types Theorem - [ ] depends on: #32215 merge-conflict t-logic new-contributor 127/1 Mathlib.lean,Mathlib/ModelTheory/Topology/Types.lean,Mathlib/ModelTheory/Types.lean,Mathlib/Tactic/Linter/DirectoryDependency.lean 4 6 ['NoneMore', 'anishrajeev', 'github-actions', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] fpvandoorn
assignee:fpvandoorn
55-47554
1 month ago
95-50250
95 days ago
3-84208
3 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'] dagurtomas
assignee:dagurtomas
53-55104
1 month ago
53-55104
53 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
53-51362
1 month ago
55-32798
55 days ago
1-23617
1 day
34129 idontgetoutmuch
author:idontgetoutmuch
 feat: define Ehresmann connections --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) awaiting-author t-differential-geometry new-contributor 90/0 Mathlib.lean,Mathlib/Geometry/Manifold/EhresmannConnection.lean 2 5 ['github-actions', 'grunweg', 'idontgetoutmuch', 'metakunt'] nobody
52-72912
1 month ago
56-51798
56 days ago
0-1188
19 minutes
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
48-43887
1 month 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
47-33460
1 month ago
108-50425
108 days ago
8-14810
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 531/0 Mathlib.lean,Mathlib/Combinatorics/Enumerative/Partition/EulerComb.lean 2 5 ['chiyunhsu', 'github-actions', 'tb65536', 'vihdzp'] b-mehta
assignee:b-mehta
46-56981
1 month ago
46-56981
46 days ago
42-22427
42 days
33817 FlAmmmmING
author:FlAmmmmING
 fix(Combinatorics/Enumerative/Schroder.lean): Fix the definition and theorem 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 61/39 Mathlib/Combinatorics/Enumerative/Schroder.lean 1 19 ['FlAmmmmING', 'github-actions', 'vihdzp'] awainverse
assignee:awainverse
46-18675
1 month ago
61-7951
61 days ago
65-59363
65 days
34227 stepan2698-cpu
author:stepan2698-cpu
 feat: If sum of densities is at least one, the sumset covers the naturals Proves an outstanding TODO item from Mathlib.Combinatorics.Schnirelmann : shows that if the sum of two densities is at least one, the sumset covers the positive naturals. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-combinatorics new-contributor 51/1 Mathlib/Combinatorics/Schnirelmann.lean 1 3 ['github-actions', 'grunweg', 'kbuzzard'] awainverse
assignee:awainverse
46-18672
1 month ago
54-25047
54 days ago
54-39105
54 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
45-79388
1 month ago
54-63403
54 days ago
2-6824
2 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 13 ['SnirBroshi', 'floor-licker', 'github-actions'] kmill
assignee:kmill
45-18682
1 month ago
58-36371
58 days ago
58-39537
58 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
44-30793
1 month ago
98-31231
98 days ago
0-2004
33 minutes
33520 NoneMore
author:NoneMore
 feat(ModelTheory/ElementarySubstructures): add a variant of Tarski-Vaught test taking sets as input There should exist an `ElementarySubstructure.copy` such that we can directly bundle the set itself instaed of its closure as an elementary substructure. The other direction depends on #33458. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-logic new-contributor 55/0 Mathlib/ModelTheory/ElementarySubstructures.lean 1 3 ['Citronhat', 'NoneMore', 'github-actions'] awainverse
assignee:awainverse
44-18633
1 month ago
72-68254
72 days ago
72-68209
72 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
43-69624
1 month ago
162-20193
162 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
43-69617
1 month ago
162-25846
162 days ago
0-241
4 minutes
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
label:t-algebra$
 300/2 Mathlib.lean,Mathlib/LinearAlgebra/PiTensorProduct.lean,Mathlib/LinearAlgebra/PiTensorProduct/Set.lean 3 28 ['PrParadoxy', 'dagurtomas', 'eric-wieser', 'github-actions', 'goliath-klein', 'leanprover-radar', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] dagurtomas
assignee:dagurtomas
43-69586
1 month ago
84-46488
84 days ago
10-66980
10 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 4/0 Mathlib/MeasureTheory/Constructions/Polish/Basic.lean 1 9 ['ADedecker', 'LTolDe', 'dupuisf', 'github-actions', 'jcommelin'] PatrickMassot
assignee:PatrickMassot
43-69391
1 month ago
69-53523
69 days ago
11-7507
11 days
33109 felixpernegger
author:felixpernegger
 feat(Data/Nat/Choose): Binomial inversion This PR adds binomial inversion (also called binomial transform), which is a useful method for proving binomial identities. It is tricky to find direct references to binomial inversion, but for example [this](https://en.wikipedia.org/wiki/Binomial_transform#Binomial_convolution) Wikipedia article mentions it ("The formula"). The first theorem ```alternating_sum_choose_mul_of_alternating_sum_choose_mul``` could be refined (we only need the hypothesis ```h``` up to some point), but this seems to needlessly complicate it. awaiting-author new-contributor t-data 107/0 Mathlib.lean,Mathlib/Data/Nat/Choose/Inversion.lean 2 6 ['dagurtomas', 'felixpernegger', 'github-actions', 'thomaskwaring', 'wwylele'] dagurtomas
assignee:dagurtomas
43-69260
1 month ago
53-50482
53 days ago
33-35408
33 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
43-61332
1 month ago
140-52778
140 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
43-60099
1 month ago
119-16902
119 days ago
0-150
2 minutes
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 186/1 Mathlib/Combinatorics/SimpleGraph/Bipartite.lean 1 5 ['NickAdfor', 'github-actions', 'jcommelin'] kmill
assignee:kmill
43-59831
1 month ago
45-60728
45 days ago
26-1427
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 `R`-modules `M` and `N` and a set `s` in `M`, `Submodule.dual p s` is the submodule in `N` consisting of all points `y` such that `0 = p x y` for all `x ∈ s`. 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 5 ['github-actions', 'joelriou', 'martinwintermath'] joelriou
assignee:joelriou
43-55868
1 month ago
45-38327
45 days ago
14-81375
14 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 49/25 Mathlib/Analysis/InnerProductSpace/Orthogonal.lean,Mathlib/LinearAlgebra/QuadraticForm/Basic.lean,Mathlib/LinearAlgebra/SesquilinearForm/Basic.lean 3 1 ['github-actions'] nobody
43-23371
1 month ago
unknown
0-0
0 seconds
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
41-38352
1 month ago
unknown
0-0
0 seconds
32570 ksenono
author:ksenono
 feat(Combinatorics/SimpleGraph): bipartite subgraphs and vertex-disjoint graphs for Konig's theorem --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-combinatorics new-contributor 22/0 Mathlib/Combinatorics/SimpleGraph/Bipartite.lean,Mathlib/Combinatorics/SimpleGraph/Subgraph.lean 2 19 ['SnirBroshi', 'github-actions', 'jcommelin', 'ksenono', 'vlad902'] kmill
assignee:kmill
41-28442
1 month ago
41-28442
41 days ago
93-64600
93 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
41-11128
1 month ago
41-47981
41 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
40-75241
1 month ago
70-59104
70 days ago
0-412
6 minutes
34191 IlPreteRosso
author:IlPreteRosso
 feat(Topology/Algebra/InfiniteSum): Discrete Convolution API 1st PR Defines the very basics of the discrete convolution API. In analogy with [MeasureTheory.Convolution](https://leanprover-community.github.io/mathlib4_docs/Mathlib/Analysis/Convolution.html#MeasureTheory.convolution). Main definitions include - `mulFiber`, `convolution`, `ConvolutionExists`, `ConvolutionExists.add_distrib`, `ConvolutionExistsAt.smul_convolution`, `mulFiber_swapEquiv`, `convolution_comm` RM: - The main docstring is *as is* - Next step is triple sum intrastrcutre + `assoc` theorems for convolution (long) Continues the work from #33411 and #33410 (splitting into shorter PRs, carries over the modifications from previous reviews) t-topology new-contributor 277/0 Mathlib.lean,Mathlib/Topology/Algebra/InfiniteSum/DiscreteConvolution.lean 2 18 ['IlPreteRosso', 'github-actions', 'j-loreaux'] PatrickMassot
assignee:PatrickMassot
40-47548
1 month ago
40-47743
40 days ago
49-49381
49 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
39-34266
1 month ago
42-52406
42 days ago
0-2854
47 minutes
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
38-67603
1 month ago
38-67603
38 days ago
12-25418
12 days
34182 IlPreteRosso
author:IlPreteRosso
 feat(Data/Finsupp/Single, Data/Finsupp/Indicator): Add set_indicator_singleton, indicator_singleton; golfed single_eq_set_indicator, single_eq_indicator [Mathlib.Data.Finsupp.Single](https://leanprover-community.github.io/mathlib4_docs/Mathlib/Data/Finsupp/Single.html#Finsupp.single) - Add `set_indicator_singleton`, golfed `single_eq_set_indicator` [Mathlib.Data.Finsupp.Indicator](https://leanprover-community.github.io/mathlib4_docs/Mathlib/Data/Finsupp/Indicator.html#Finsupp.indicator_apply) - Add `indicator_singleton`, golfed `single_eq_indicator` Continues the work from #34095 large-import t-data new-contributor 17/17 Mathlib/Data/Finsupp/Indicator.lean,Mathlib/Data/Finsupp/Single.lean 2 29 ['IlPreteRosso', 'eric-wieser', 'github-actions', 'mathlib-bors', 'urkud'] eric-wieser and urkud
assignee:urkud assignee:eric-wieser
38-48459
1 month ago
55-7076
55 days ago
55-15024
55 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
37-17442
1 month ago
37-17442
37 days ago
35-16104
35 days
34815 Deep0Thinking
author:Deep0Thinking
 feat(Analysis/SpecialFunctions/ImproperIntegrals): Frullani integral - [ ] 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/IntegralEqImproper.lean,Mathlib/MeasureTheory/Integral/IntervalIntegral/MeanValue.lean,Mathlib/Order/Interval/Set/LinearOrder.lean,Mathlib/Topology/Algebra/GroupWithZero.lean,Mathlib/Topology/Algebra/Monoid.lean 6 6 ['CoolRmal', 'Deep0Thinking', 'github-actions', 'mathlib-dependent-issues', 'sgouezel'] nobody
37-1157
1 month ago
39-62740
39 days ago
1-43880
1 day
34093 YellPika
author:YellPika
 feat(Order/OmegaCompletePartialOrder): add `OmegaCompletePartialOrder` instance for `Option` with basic `ωScottContinuous` lemmas --- - [x] depends on: #33941 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-order new-contributor 297/0 Mathlib.lean,Mathlib/Data/Option/Order.lean,Mathlib/Order/Monotone/Basic.lean,Mathlib/Order/OmegaCompletePartialOrder.lean 4 5 ['YellPika', 'github-actions', 'mathlib-dependent-issues', 'mathlib-merge-conflicts'] pechersky
assignee:pechersky
36-18752
1 month ago
41-1088
41 days ago
41-4007
41 days
26985 agjftucker
author:agjftucker
 feat(Analysis/Calculus/ImplicitFunction): define implicitFunctionOfProdDomain This PR continues the work from #16743. Original PR: https://github.com/leanprover-community/mathlib4/pull/16743 --- - [x] depends on: #28352 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-analysis new-contributor 269/157 Mathlib.lean,Mathlib/Analysis/Calculus/Implicit.lean,Mathlib/Analysis/Calculus/ImplicitContDiff.lean,Mathlib/Analysis/Calculus/ImplicitFunction/ProdDomain.lean 4 27 ['agjftucker', 'github-actions', 'j-loreaux', 'mathlib-bors', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot', 'winstonyin'] hrmacbeth
assignee:hrmacbeth
34-80611
1 month ago
34-80611
34 days ago
103-12618
103 days
32744 NoneMore
author:NoneMore
 feat(ModelTheory/Definablity): add `DefinableFun` definition and lemmas This PR adds two basic shapes of definable sets and `DefinableFun` definition with relevant lemmas. The main result is `Set.Definable.preimage_of_map` asserting that the preimage of a definable set under a definable map is definable. There are also some tool lemmas derived by the preimage lemma. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor t-logic 147/0 Mathlib/ModelTheory/Definability.lean 1 59 ['NoneMore', 'github-actions', 'mathlib4-merge-conflict-bot', 'staroperator'] awainverse
assignee:awainverse
34-74647
1 month ago
66-84367
66 days ago
94-36586
94 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
34-52316
1 month ago
67-75184
67 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 - [ ] depends on: #26165 --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) blocked-by-other-PR new-contributor t-measure-probability merge-conflict 916/0 Mathlib.lean,Mathlib/MeasureTheory/VectorMeasure/Integral.lean,Mathlib/MeasureTheory/VectorMeasure/Variation/Defs.lean,Mathlib/MeasureTheory/VectorMeasure/Variation/Equiv.lean,Mathlib/MeasureTheory/VectorMeasure/Variation/Lemmas.lean 5 4 ['github-actions', 'mathlib-merge-conflicts', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
34-33305
1 month ago
254-75572
254 days ago
15-65390
15 days
33463 khwilson
author:khwilson
 feat(Mathlib/Analysis/Polynomial/MahlerMeasure): Mahler Measure for other rings Define `mahlerMeasure'` which allows you specify a norm preserving map `v` from any `NormedRing A` (or more general) to `ℂ`. Also provide wrappers around the main `mahlerMeasure` lemmas that are used for estimation. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor t-analysis awaiting-author 97/3 Mathlib/Analysis/Polynomial/MahlerMeasure.lean,Mathlib/NumberTheory/MahlerMeasure.lean 2 21 ['github-actions', 'j-loreaux', 'khwilson', 'plp127', 'vlad902'] nobody
34-29647
1 month ago
34-31870
34 days ago
0-5062
1 hour
34481 DAE123456
author:DAE123456
 feat: Ore's Theorem Ore Theorem : Let G be a graph of order n ≥ 3 that satisfies the Ore property. Then G has a Hamilton cycle. t-combinatorics new-contributor 3372/0 Mathlib.lean,Mathlib/Combinatorics/SimpleGraph/Ore.lean 2 25 ['DAE123456', 'LLaurance', 'Ruben-VandeVelde', 'YaelDillies', 'github-actions', 'kim-em', 'tb65536', 'vlad902'] b-mehta
assignee:b-mehta
34-18598
1 month ago
42-73613
42 days ago
46-38682
46 days
34722 GrigorenkoPV
author:GrigorenkoPV
 feat(Data/Finset/RangeDistance): add --- 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 34/0 Mathlib.lean,Mathlib/Algebra/Order/Group/Unbundled/Abs.lean,Mathlib/Data/Finset/RangeDistance.lean 3 4 ['GrigorenkoPV', 'github-actions', 'joneugster', 'plp127'] TwoFX
assignee:TwoFX
34-18594
1 month ago
42-59405
42 days ago
42-61265
42 days
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 submersions. t-differential-geometry new-contributor 596/0 Mathlib.lean,Mathlib/Geometry/Manifold/Submersion.lean 2 2 ['github-actions'] grunweg
assignee:grunweg
33-55014
1 month ago
33-56788
33 days ago
33-58158
33 days
32845 jonasvanderschaaf
author:jonasvanderschaaf
 feat(CategoryTheory): `GrothendieckTopology.yoneda` preserves certain (co)limits We prove that if every `J`-sheaf preserves limits of shape `Kᵒᵖ`, then `J.yoneda` preserves colimits of shape `K`, and the dual statement. We specialize to the case of finite products, and deduce that the inclusion of light profinite sets in light condensed sets preserves finite coproducts From [LeanCondensed](https://github.com/dagurtomas/LeanCondensed) --- Co-authored-by: Dagur Asgeirsson [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor t-category-theory t-condensed large-import awaiting-author 107/5 Mathlib.lean,Mathlib/CategoryTheory/Limits/Preserves/Shapes/Products.lean,Mathlib/CategoryTheory/Sites/PreservesLimits.lean,Mathlib/Condensed/Functors.lean,Mathlib/Condensed/Light/Functors.lean 5 5 ['github-actions', 'jonasvanderschaaf', 'robin-carlier'] nobody
33-47979
1 month ago
45-75411
45 days ago
8-53205
8 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
33-35666
1 month ago
61-50770
61 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
32-64199
1 month ago
77-56746
77 days ago
5-47362
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
32-28889
1 month ago
37-18209
37 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 8 ['SnirBroshi', 'github-actions', 'ksenono', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot', 'vlad902'] nobody
32-12799
1 month ago
88-81855
88 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
31-62966
1 month ago
32-23795
32 days ago
7-49555
7 days
32807 WilliamCoram
author:WilliamCoram
 feat: Define the Gauss norm for MvPowerSeries We adjust the current definition for Gauss norm on power series to work for multivariate power series. If this seems acceptable I can refactor the single variable case. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-ring-theory new-contributor 124/0 Mathlib.lean,Mathlib/RingTheory/MvPowerSeries/GaussNorm.lean 2 25 ['WilliamCoram', 'erdOne', 'fbarroero', 'github-actions', 'mathlib4-merge-conflict-bot', 'vihdzp'] alreadydone
assignee:alreadydone
31-59032
1 month ago
31-59098
31 days ago
44-66915
44 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
30-45346
1 month ago
40-64603
40 days ago
6-49759
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
30-32410
1 month ago
38-55783
38 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
30-30985
1 month ago
38-53973
38 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 5 ['erdOne', 'github-actions', 'urkud'] erdOne
assignee:erdOne
30-18566
1 month ago
79-32962
79 days ago
4-57005
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
30-17630
1 month ago
343-50296
343 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
29-73653
1 month ago
81-41478
81 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
29-42838
1 month ago
179-54614
179 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
29-38461
1 month ago
176-72289
176 days ago
20-70133
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'] RemyDegenne
assignee:RemyDegenne
28-43752
1 month ago
70-36137
70 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 - [ ] 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
27-71287
27 days ago
259-57073
259 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
27-53583
27 days ago
27-53683
27 days ago
39-79348
39 days
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 ℝ → Matrix p q ℝ`. 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. mkdir 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 219/0 Mathlib.lean,Mathlib/Analysis/Matrix/Jacobian.lean 2 11 ['erdOne', 'github-actions', 'jcommelin'] sgouezel
assignee:sgouezel
27-53231
27 days ago
27-53985
27 days ago
39-33072
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
27-52092
27 days ago
27-53290
27 days ago
1-24662
1 day
35448 mathlib-splicebot
author:mathlib-splicebot
 chore(Mathlib/Tactic/Linter/GlobalSyntax.lean): automated extraction This PR was automatically created from a review comment on PR #34019. t-linter new-contributor 138/0 Mathlib/Tactic/Linter/GlobalSyntax.lean 1 2 ['github-actions'] nobody
27-49742
27 days ago
27-49410
27 days ago
0-403
6 minutes
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
27-47849
27 days ago
27-48055
27 days ago
39-9588
39 days
34851 dennj
author:dennj
 feat(Data/Matrix/Mul): add diagonal and transpose lemmas for vector operations This adds three lemmas for matrix-vector operations that serve as foundational support for future ML formalization: - `vecMul_diagonal_dotProduct`: weighted inner product `x ᵥ* diagonal d ⬝ᵥ y = ∑ i, d i * x i * y i` - `dotProduct_transpose_mulVec`: bilinear form symmetry `x ⬝ᵥ Aᵀ *ᵥ y = y ⬝ᵥ A *ᵥ x` - `mul_diagonal_mulVec`: column-weighted sum `(A * diagonal d) *ᵥ x = ∑ i, (d i * x i) • A.col i` These are basic linear algebra identities involving diagonal matrices and vector operations that appear frequently in machine learning contexts (weighted inner products, attention mechanisms, feature scaling, diagonal preconditioning). t-data new-contributor 22/0 Mathlib/Data/Matrix/Mul.lean 1 5 ['dennj', 'eric-wieser', 'github-actions', 'themathqueen'] pechersky
assignee:pechersky
27-24776
27 days ago
40-34252
40 days ago
40-34207
40 days
28546 Sfgangloff
author:Sfgangloff
 feat(SymbolicDynamics): basic setup of Zd, full shift, cylinders, pat… This PR adds a **group-generic** foundation for symbolic dynamics over an arbitrary group `G`, together with convenient specializations for `ℤ` and `ℤ^d`. Summary of additions: - **Full shift and shift action** - `abbrev FullShift (A G) := G → A` (inherits product topology from the Π-type). - Right shift `shift g x` with convention `(shift g x) h = x (h * g)`. - **Cylinders and topology** - `cylinder U x : Set (G → A)` for finite `U : Finset G`. - Cylinders are open under `[DiscreteTopology A]`; with a finite alphabet they are also closed. - Equality with dependent products: `cylinder U x = Set.pi (↑U) (fun i => ({x i} : Set A))`, enabling use of the `Set.pi` API. - **Patterns, occurrences, and subshifts** - `Pattern A G` with finite `support : Finset G` and `data : support → A`. - `Pattern.occursIn p x g` (occurrence at translate `g`) and the expected shift law. - `forbids F` and `Subshift A G` (closed, shift-invariant subsets). - `FixedSupport A G U` with an equivalence to `(U → A)` to obtain finiteness. - **Language on finite shapes and counting** - `languageOn X U`, `languageCardOn X U`, and `patternCountOn Y U`. - **Entropy along a shape sequence** - `limsupAtTop` (as an `sInf` of eventual upper bounds). - `entropyAlong X F hF := limsup (log (patternCountOn X (F n) + 1) / |F n|)` for any nonempty finite shapes `F : ℕ → Finset G` (the `+ 1` avoids `log 0`). - **Specializations** - `IntShapes`: segments `[-n,n]` on `Multiplicative ℤ`, with `entropy_Z`. - `ZdShapes`: boxes `[-n,n]^d` on `ℤ^d` (as functions `Fin d → ℤ`), with `entropy_Zd`. Mathematical remarks: - The API is **shape-parametric**: entropy is defined along user-provided finite shapes. - On **amenable** groups, using a **Følner** sequence yields a canonical value (Ornstein–Weiss). This PR does not assume amenability; the family of shapes is an explicit input. Motivation: Provide a clean, reusable base for symbolic dynamics on groups in mathlib. Future work: - Add a Følner predicate and prove shape-independence / limit existence on amenable groups. - Expand the `ℤ`/`ℤ^d` toolkit (alternative shapes, mixing, factors). - Develop 1D theory and, longer-term, multidimensional SFT results (e.g. along the lines of Hochman–Meyerovitch). t-dynamics new-contributor 746/0 Mathlib.lean,Mathlib/Dynamics/SymbolicDynamics/Basic.lean,Mathlib/Tactic/Translate/ToAdditive.lean 3 180 ['Sfgangloff', 'botbaki-review', 'eric-wieser', 'github-actions', 'kckennylau', 'mathlib4-merge-conflict-bot', 'sgouezel'] sgouezel
assignee:sgouezel
27-20245
27 days ago
28-19543
28 days ago
131-65368
131 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
27-17723
27 days ago
27-17723
27 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
27-1467
27 days ago
77-66140
77 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
26-67601
26 days ago
26-67602
26 days ago
17-1225
17 days
32891 felixpernegger
author:felixpernegger
 feat(Topology/EMetricSpace): Introduction of ```Weak(Pseudo)EMetricSpace``` This PR introduces Weak(Pseudo)EMetric spaces, some basic properties and the fact that the One-Point Compactification of a Weak(Pseudo)EMetricSpace again has a Weak(Pseudo)EMetricSpace structure. This is inspired by discussion at [this](https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/EMetricSpace.20is.20broken/near/530540916) and based on #27756. In short, types like ```ENNReal``` and ```ENat``` have a very "metric-like" structure, but are not yet a ```WeakPseudoEMetricSpace``` (which is the weakest form of a metric-like structure in mathlib). Therefore, the class```WeakEMetricSpace``` could be used to make more definitions applicable to ```ENNReal```, for instance EVartiationOn ([this](https://leanprover-community.github.io/mathlib4_docs/Mathlib/Topology/EMetricSpace/BoundedVariation.html#eVariationOn)). As of now, this PR is still missing important properties like products and induced (and therefore subtypes) of ```Weak(Pseudo)EMetricSpace```'s and instances ```ENNReal``` and ```ENat``` (which should be rather easy however with the one-point compactification property). awaiting-author new-contributor t-topology merge-conflict 453/10 Mathlib.lean,Mathlib/Topology/EMetricSpace/Defs.lean,Mathlib/Topology/EMetricSpace/Weak.lean 3 30 ['felixpernegger', 'github-actions', 'j-loreaux', 'mathlib4-merge-conflict-bot', 'plp127'] j-loreaux
assignee:j-loreaux
25-60321
25 days ago
55-38227
55 days ago
12-50285
12 days
35473 mike1729
author:mike1729
 feat(Analysis/Normed/Module): Schauder bases, basic sequences, and the Eberlein–Šmulian theorem This PR develops the theory of Schauder bases and basic sequences in Banach spaces, culminating in a proof of the **Eberlein–Šmulian theorem**: in a Banach space, a weakly countably compact set is weakly compact (and weakly sequentially compact). **Note:** This PR is too large to review in one go. It will be split into smaller parts and merged incrementally. The first part is already under review: The proof follows the basic-sequence approach of Pełczyński, as presented in Albiac–Kalton *Topics in Banach Space Theory* (2016). The main line of argument is: 1. Define generalized Schauder bases (indexed by arbitrary types with a summation filter) and the classical sequential Schauder basis as a special case. 2. Introduce basic sequences and their characterization via the Grünblum condition. 3. Prove the **selection principle**: extract basic sequences from sets where the weak and norm closures disagree (via a perturbation/finite-dimensional compactness argument in the dual). 4. Show that a bounded set containing no basic sequence has relatively weakly compact closure. 5. Combine these ingredients to prove both directions of the Eberlein–Šmulian theorem. ## Main definitions * `GeneralSchauderBasis β 𝕜 X L`: A Schauder basis for a normed space `X` over `𝕜`, indexed by a type `β` with a `SummationFilter L`. Unifies classical (sequential) and unconditional bases. * `BasicSequence 𝕜 X`: A bundled ℕ-indexed sequence forming a Schauder basis for its closed linear span. ## Main results * `isBasicSequence_of_Grunblum_with_bound`: A nonzero sequence satisfying the Grünblum condition is a basic sequence, with explicit basis constant bound. * `basic_sequence_selection_dual`: Extracts a basic sequence from a set that is weak*-dense near 0 but norm-separated from 0. * `exists_basicSequence_of_weakClosure_not_normClosure`: If 0 is in the weak closure of `S` but not its norm closure, then `S` contains a basic sequence. * `schauderBasisOfClosure`: Constructs a Schauder basis for the topological closure from a basis on a subspace. * `no_basic_sequence_implies_relatively_weakly_compact`: A bounded set with no basic sequence has weakly compact closure. * `eberlein_smulian_isSeqCompact`: A weakly countably compact set in a Banach space is weakly sequentially compact. * `eberlein_smulian`: **Eberlein–Šmulian theorem.** A weakly countably compact set in a Banach space is weakly compact. * `IsCompact.frechetUrysohnSpace`: Weakly compact subsets of a Banach space are Fréchet–Urysohn (angelic). ## References * [F. Albiac, N.J. Kalton, *Topics in Banach Space Theory*, Springer, 2016][albiac2016] * I. Singer, *Bases in Banach Spaces*, 1970. --- - [ ] depends on: #34209 - [ ] depends on: #35559 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-analysis new-contributor blocked-by-other-PR 2691/0 Mathlib.lean,Mathlib/Analysis/Normed/Module/SchauderBasis/Basic.lean,Mathlib/Analysis/Normed/Module/SchauderBasis/BasicSequence.lean,Mathlib/Analysis/Normed/Module/SchauderBasis/BasicSequenceSelection.lean,Mathlib/Analysis/Normed/Module/SchauderBasis/Closure.lean,Mathlib/Analysis/Normed/Module/SchauderBasis/CountablyCompact.lean,Mathlib/Analysis/Normed/Module/SchauderBasis/EberleinSmulian.lean,Mathlib/Analysis/Normed/Module/SchauderBasis/NoBasicSequence.lean 8 6 ['CoolRmal', 'github-actions', 'mathlib-dependent-issues', 'mike1729'] nobody
25-532
25 days ago
unknown
0-0
0 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
24-65387
24 days ago
24-65387
24 days ago
13-78266
13 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 [![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 172/0 Mathlib/Data/Sigma/Order.lean,Mathlib/Order/OmegaCompletePartialOrder.lean 2 28 ['Vierkantor', 'YellPika', 'github-actions', 'grunweg', 'mathlib-dependent-issues', 'mathlib-merge-conflicts'] grunweg
assignee:grunweg
24-13286
24 days ago
24-35183
24 days ago
16-66871
16 days
35620 inaciovasquez2020
author:inaciovasquez2020
 feat(Fintype): choose element from nonempty finite type This PR adds a noncomputable choice function for finite types with nonzero cardinality. * `Fintype.chooseOfCardNeZero` provides a witness of `α` from `[Fintype α]` assuming `Fintype.card α ≠ 0`. * A regression test is included in `MathlibTest/Fintype/ChooseOfCardNeZero.lean`. The construction follows existing mathlib choice patterns and is explicitly marked `noncomputable`. t-data new-contributor 21/0 Mathlib.lean,Mathlib/Data/Fintype/Choose.lean,MathlibTest/Fintype/ChooseOfCardNeZero.lean 3 4 ['github-actions', 'plp127', 'vihdzp'] nobody
23-2123
23 days ago
23-18431
23 days ago
0-448
7 minutes
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
21-84499
21 days ago
21-84499
21 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
21-29796
21 days ago
97-30666
97 days ago
2-78371
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 164/8 Mathlib/Combinatorics/SimpleGraph/Bipartite.lean,Mathlib/Combinatorics/SimpleGraph/ConcreteColorings.lean 2 70 ['IvanRenison', 'NickAdfor', 'Rida-Hamadani', 'SnirBroshi', 'github-actions', 'kmill', 'mitchell-horner', 'vihdzp', 'vlad902'] kmill
assignee:kmill
21-18770
21 days ago
37-17704
37 days ago
45-25605
45 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 186/41 Mathlib/Analysis/Normed/Group/Uniform.lean,Mathlib/Analysis/Normed/Lp/lpSpace.lean,Mathlib/Analysis/RCLike/Basic.lean 3 14 ['github-actions', 'j-loreaux', 'ster-oc'] j-loreaux
assignee:j-loreaux
20-41894
20 days ago
20-41894
20 days ago
8-27645
8 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 awaiting-author 205/0 Mathlib/Analysis/Complex/CauchyIntegral.lean 1 6 ['github-actions', 'j-loreaux', 'loefflerd', 'mathlib4-merge-conflict-bot', 'thefundamentaltheor3m', 'wwylele'] urkud
assignee:urkud
20-29916
20 days ago
20-29916
20 days ago
34-11222
34 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
20-26132
20 days ago
79-33280
79 days ago
3-73599
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 5 ['github-actions', 'mathlib-merge-conflicts', 'vihdzp'] nobody
20-25755
20 days ago
38-53440
38 days ago
1-62439
1 day
34854 GrigorenkoPV
author:GrigorenkoPV
 chore(Combinatorics/Enumerative/Catalan): split into `Basic` & `Tree` --- Split off from #34853 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor merge-conflict 228/195 Mathlib.lean,Mathlib/Combinatorics/Enumerative/Catalan.lean,Mathlib/Combinatorics/Enumerative/Catalan/Basic.lean,Mathlib/Combinatorics/Enumerative/Catalan/Tree.lean,Mathlib/Combinatorics/Enumerative/DyckWord.lean,Mathlib/RingTheory/PowerSeries/Catalan.lean 6 5 ['SnirBroshi', 'github-actions', 'mathlib-merge-conflicts', 'vihdzp'] thorimur
assignee:thorimur
20-25754
20 days ago
20-25755
20 days ago
19-76299
19 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 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor large-import t-order 191/1 Mathlib/Data/Sum/Basic.lean,Mathlib/Data/Sum/Order.lean,Mathlib/Order/OmegaCompletePartialOrder.lean,Mathlib/Order/ScottContinuity.lean 4 20 ['Vierkantor', 'YellPika', 'github-actions', 'mathlib-dependent-issues', 'mathlib-merge-conflicts', 'vihdzp'] bryangingechen
assignee:bryangingechen
20-18750
20 days ago
31-46913
31 days ago
41-9120
41 days
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
20-13213
20 days ago
20-33189
20 days ago
0-2842
47 minutes
35402 samueloettl
author:samueloettl
 feat(Dynamics/BirkhoffSum): birkhoffAverage const --- I think this might be useful. My feeling tells me that 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 22/0 Mathlib/Dynamics/BirkhoffSum/Average.lean 1 2 ['github-actions'] urkud
assignee:urkud
19-18772
19 days ago
22-28446
22 days ago
28-61689
28 days
33443 sahanwijetunga
author:sahanwijetunga
 feat: Define Isometries of Bilinear Spaces --- We define Isometries of Bilinear Spaces, closely following the implementation of isometries of quadratic spaces. [![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$
 279/0 Mathlib.lean,Mathlib/LinearAlgebra/BilinearForm/Isometry.lean,Mathlib/LinearAlgebra/BilinearForm/IsometryEquiv.lean 3 16 ['github-actions', 'robin-carlier', 'sahanwijetunga'] mattrobball
assignee:mattrobball
18-83471
18 days ago
31-50812
31 days ago
42-86363
42 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
18-74537
18 days ago
364-52476
364 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
18-74521
18 days ago
315-56415
315 days ago
39-61332
39 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
18-25961
18 days 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
18-8150
18 days ago
282-37449
282 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
18-5676
18 days ago
33-61322
33 days ago
0-531
8 minutes
33458 NoneMore
author:NoneMore
 feat(ModelTheory): add lifting for embeddings to languages with constants Prepare for a generalized Tarski-Vaught test with a set as input instead of a substructure. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-logic new-contributor 46/0 Mathlib/ModelTheory/ElementaryMaps.lean,Mathlib/ModelTheory/LanguageMap.lean 2 7 ['Citronhat', 'NoneMore', 'fpvandoorn', 'github-actions'] fpvandoorn
assignee:fpvandoorn
17-59921
17 days ago
17-60139
17 days ago
73-72673
73 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
17-58848
17 days ago
306-41320
306 days ago
17-16443
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
17-56529
17 days ago
23-43902
23 days ago
0-103
1 minute
35653 pepamontero
author:pepamontero
 feat: add ChartedSpace structure on orbit space feat: add ChartedSpace structure on orbit space Add topological preliminaries for properly discontinuous group actions, and use them to equip the orbit space `orbitRel.Quotient G M` with a `ChartedSpace` structure. In particular: - Show that the quotient map `Quotient.mk _ : M → orbitRel.Quotient G M` is a covering map and hence a local homeomorphism. - Construct chosen local inverses of the quotient map and establish properties over them. - Define a `ChartedSpace` instance on the quotient by composing these local inverses with charts of M. This started as an ItaLean2025 project; here is the [Zulip thread](https://leanprover.zulipchat.com/#narrow/channel/541885-ItaLean-2025/topic/Projects.3A.20Quotient.20Manifolds/with/575121158) dedicated to it. --- new-contributor t-differential-geometry 186/0 Mathlib.lean,Mathlib/Geometry/Manifold/Instances/OrbitSpace.lean,Mathlib/Topology/Algebra/OrbitSpace.lean 3 2 ['github-actions'] grunweg
assignee:grunweg
17-50070
17 days ago
22-37815
22 days ago
22-38445
22 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
17-34833
17 days ago
17-34833
17 days ago
38-12430
38 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. *(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 95/0 Mathlib.lean,Mathlib/Logic/Equiv/ListNatBijective.lean 2 4 ['AlexeyMilovanov', 'SnirBroshi', 'github-actions'] nobody
17-30904
17 days ago
17-39976
17 days ago
17-40388
17 days
35376 michaellee94
author:michaellee94
 feat(Geometry/Manifold): orientable manifolds --- - [ ] 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 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 4 ['github-actions', 'mathlib-dependent-issues', 'mathlib-merge-conflicts'] nobody
16-25109
16 days ago
29-44483
29 days ago
0-169
2 minutes
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
15-62039
15 days ago
20-36254
20 days ago
0-306
5 minutes
34477 spanning-tree
author:spanning-tree
 refactor(Order): make CompletePartialOrder extend OrderBot Make `CompletePartialOrder` extend `OrderBot`, and add a constructor `completePartialOrderOfLubOfDirected`. Previously, `CompletePartialOrder` had an implicit bottom element but did not extend OrderBot explicitly. Breaking change: `CompletePartialOrder` instances must provide `⊥` and `bot_le`, or use the constructor. See discussion in [Zulip](https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/.3E.20complete.20partial.20order.20and.20domain.20theory.20formalization). --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-order new-contributor 15/1 Mathlib/Order/CompletePartialOrder.lean 1 3 ['Citronhat', 'github-actions', 'mathlib-merge-conflicts'] pechersky
assignee:pechersky
15-58063
15 days ago
15-58086
15 days ago
36-33198
36 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 680/0 Mathlib.lean,Mathlib/Geometry/Manifold/ExistsRiemannianMetric.lean,Mathlib/Geometry/Manifold/PartitionOfUnity.lean 3 200 ['github-actions', 'grunweg', 'idontgetoutmuch'] grunweg
assignee:grunweg
15-51221
15 days ago
15-51247
15 days ago
29-81377
29 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 t-algebra new-contributor
label:t-algebra$
 135/0 Mathlib.lean,Mathlib/LinearAlgebra/Matrix/ShermanMorrison.lean 2 11 ['Xxxjdjdid', 'banrovegrie', 'copilot-pull-request-reviewer', 'eric-wieser', 'github-actions', 'wwylele'] kim-em
assignee:kim-em
15-49667
15 days ago
39-53484
39 days ago
39-53439
39 days
35700 inaciovasquez2020
author:inaciovasquez2020
 MeasureTheory: introduce supportDrift for probability measures Minimal mathlib-facing definition of with lemma. Clean-clone reproducibility verified. t-measure-probability new-contributor 119/0 Mathlib/MeasureTheory/SupportDrift.lean,Mathlib/Physics/OperatorAnchor/CoerciveGap.lean,Mathlib/Physics/OperatorAnchor/SpectralGap.lean 3 2 ['github-actions'] nobody
15-40672
15 days ago
15-40374
15 days ago
0-742
12 minutes
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
15-9844
15 days ago
258-75977
258 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 10/0 Mathlib/NumberTheory/Divisors.lean 1 5 ['adrianmartir', 'alexjbest', 'github-actions'] alexjbest
assignee:alexjbest
14-73570
14 days ago
18-71572
18 days ago
18-71563
18 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
14-69174
14 days ago
27-57179
27 days ago
0-3706
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. --- Builds on: #31121 Related to: #29639, #29643, #29646 awaiting-author t-algebra new-contributor
label:t-algebra$
 428/0 Mathlib.lean,Mathlib/Algebra/Homology/EulerPoincare.lean 2 25 ['github-actions', 'jessealama', 'joelriou', 'kim-em', 'mathlib-merge-conflicts', 'mathlib4-merge-conflict-bot'] dagurtomas
assignee:dagurtomas
14-64498
14 days ago
142-79670
142 days ago
35-45800
35 days
33790 eliasjudin
author:eliasjudin
 feat(CategoryTheory/Preadditive/Mat): add natural transformation and isomorphism extension theorems Add extensionality lemmas for natural transformations and comparisons `L ≅ Mat_.lift F` in the additive envelope `Mat_`. - Add `Mat_.natTrans_ext`: a natural transformation `F ⟶ G` between functors `Mat_ C ⥤ D` (with `G` additive) is determined by its components on objects of the form `(embedding C).obj X`. - Add `Mat_.liftIso_ext_comp_embeddingLiftIso`: a small uniqueness lemma for comparisons `L ≅ lift F`. These lemmas streamline arguments around the universal property of `Mat_` by reducing equalities to components on objects coming from `C` via `embedding C`. No new instances or simp attributes; only `Mathlib/CategoryTheory/Preadditive/Mat.lean` changes. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-category-theory new-contributor awaiting-author 68/20 Mathlib/CategoryTheory/Preadditive/Mat.lean 1 15 ['eliasjudin', 'github-actions', 'joelriou', 'kim-em', 'mathlib-merge-conflicts'] nobody
14-50751
14 days ago
66-39149
66 days ago
0-25088
6 hours
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
13-81712
13 days ago
188-78062
188 days ago
27-52841
27 days
35576 Tehlikeli107
author:Tehlikeli107
 ⚡ [performance] Pre-compile regexes in lake-build-wrapper.py - Pre-compile `file_info_re` and `progress_re` in `BuildOutputProcessor.__init__` to avoid repeated compilation overhead. - Replace `re.sub(r'\.', '/', target)` with `target.replace('.', '/')` for better performance when converting module names to file paths. These changes result in a measured ~40% performance improvement in the core processing logic of the wrapper script. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) file-removed awaiting-author CI new-contributor merge-conflict 8/707 scripts/bench/README.md,scripts/bench/build/README.md,scripts/bench/build/fake-root/bin/lean,scripts/bench/build/fake-root/bin/lean.py,scripts/bench/build/lakeprof_report_template.html,scripts/bench/build/lakeprof_report_upload.py,scripts/bench/build/run,scripts/bench/combine.py,scripts/bench/lint/README.md,scripts/bench/lint/run,scripts/bench/measure.py,scripts/bench/open-mathlib/README.md,scripts/bench/open-mathlib/run,scripts/bench/repeatedly.py,scripts/bench/run,scripts/bench/size/README.md,scripts/bench/size/run,scripts/bench/size/run.py,scripts/lake-build-wrapper.py 19 7 ['bryangingechen', 'felixpernegger', 'github-actions', 'grunweg', 'mathlib-merge-conflicts'] nobody
13-74798
13 days ago
24-41071
24 days ago
0-8924
2 hours
36000 eliasjudin
author:eliasjudin
 add reindexing, fibers pseudofunctor, internal categories, and single-morphism descent ## Summary - **FiberedCategory**: `PseudofunctorOfFibers.lean` (pseudofunctor of fibers for a fibered category), `Reindexing.lean` (reindexing functors and coherence isos) - **InternalCategory**: `Basic.lean` (minimal internal category structure over a category with pullbacks) - **Sites/Descent**: `SingleMorphism.lean` (descent data and comparison functor for a single morphism; `IsDescentMorphism` / `IsEffectiveDescentMorphism`) - **Mathlib.lean**: import updates Naming follows mathlib convention (e.g. `singleMorphismComparisonFunctor` in lowerCamelCase for definitions). t-category-theory new-contributor 783/0 Mathlib.lean,Mathlib/CategoryTheory/FiberedCategory/PseudofunctorOfFibers.lean,Mathlib/CategoryTheory/FiberedCategory/Reindexing.lean,Mathlib/CategoryTheory/InternalCategory/Basic.lean,Mathlib/CategoryTheory/Sites/Descent/SingleMorphism.lean 5 5 ['eliasjudin', 'github-actions', 'joelriou', 'mathlib-bors'] nobody
13-71875
13 days ago
13-74893
13 days ago
0-42869
11 hours
34551 IlPreteRosso
author:IlPreteRosso
 refactor(Data.Finset.*Antidiagonal): rename defs to `set*Antidiagonal` and deprecate old names in namespace Finset Main file is [Prod.lean](https://leanprover-community.github.io/mathlib4_docs/Mathlib/Algebra/Order/Antidiag/Prod.html). Adds `Finset.HasMulAntidiagonal`, the multiplicative counterpart to `HasAntidiagonal`, linked via `@[to_additive existing]`. Split PR (current changes): This PR renames the set-based antidiagonal definitions to have a `set` prefix, distinguishing them from the typeclass-based API in `Prod.lean`. **Only definitions are renamed in this PR.** Theorem/lemma renames will follow in a subsequent PR. [MulAntidiagonal.lean](https://github.com/leanprover-community/mathlib4/blob/master/Mathlib/Data/Finset/MulAntidiagonal.lean) - `mulAntidiagonal` → `setMulAntidiagonal` - `addAntidiagonal` → `setAddAntidiagonal` (via `@[to_additive]`) [SMulAntidiagonal.lean](https://github.com/leanprover-community/mathlib4/blob/master/Mathlib/Data/Finset/SMulAntidiagonal.lean) - `SMulAntidiagonal` → `setSMulAntidiagonal` - `VAddAntidiagonal` → `setVAddAntidiagonal` (via `@[to_additive]`) Propagates to: - `Mathlib/RingTheory/HahnSeries/Multiplication.lean` - `Mathlib/RingTheory/HahnSeries/Summable.lean` --- Added deprecation aliases for the renamed definitions. [Finset/MulAntidiagonal.lean](https://github.com/leanprover-community/mathlib4/blob/master/Mathlib/Data/Finset/MulAntidiagonal.lean) ``` @[to_additive (attr := deprecated setAddAntidiagonal (since := "2026-01-31")), deprecated setMulAntidiagonal (since := "2026-01-31")] alias mulAntidiagonal := setMulAntidiagonal ``` [Finset/SMulAntidiagonal.lean](https://github.com/leanprover-community/mathlib4/blob/master/Mathlib/Data/Finset/SMulAntidiagonal.lean) ``` @[to_additive (attr := deprecated setVAddAntidiagonal (since := "2026-01-31")), deprecated setSMulAntidiagonal (since := "2026-01-31")] alias smulAntidiagonal := setSMulAntidiagonal ``` Propagates: [PointwiseSMul.lean](https://github.com/leanprover-community/mathlib4/blob/master/Mathlib/Data/Finsupp/PointwiseSMul.lean) - updated to use Set.vaddAntidiagonal (the original Set name) --- Full changes to be made: For a monoid `M`, `mulAntidiagonal n` returns the finset of pairs `(i, j)` such that `i * j = n`. [MulAntidiagonal.lean](https://leanprover-community.github.io/mathlib4_docs/Mathlib/Data/Finset/MulAntidiagonal.html) - `mulAntidiagonal` → `setMulAntidiagonal` - `addAntidiagonal` → `setAddAntidiagonal` (via `@[to_additive]`) - All related theorems renamed accordingly: - `mem_setMulAntidiagonal` - `setMulAntidiagonal_mono_left`/`setMulAntidiagonal_mono_right` - `swap_mem_setMulAntidiagonal` - `support_setMulAntidiagonal_subset_mul` - `isPWO_support_setMulAntidiagonal` - `setMulAntidiagonal_min_mul_min` [SMulAntidiagonal.lean](https://leanprover-community.github.io/mathlib4_docs/Mathlib/Data/Finset/SMulAntidiagonal.html) - `setSMulAntidiagonal` (lowercase `set` prefix) - `setVAddAntidiagonal` (via `@[to_additive setVAddAntidiagonal ...]`) - All related theorems use lowercase `set` prefix: - `mem_setSMulAntidiagonal` / `mem_setVAddAntidiagonal` - `setSMulAntidiagonal_mono_left`/`setSMulAntidiagonal_mono_right` / `setVAddAntidiagonal_mono_left`/`setVAddAntidiagonal_mono_right` - `support_setSMulAntidiagonal_subset_smul` / `support_setVAddAntidiagonal_subset_vadd` - `isPWO_support_setSMulAntidiagonal` / `isPWO_support_setVAddAntidiagonal` - `setSMulAntidiagonal_min_smul_min` / `setVAddAntidiagonal_min_vadd_min` [Prod.lean](https://leanprover-community.github.io/mathlib4_docs/Mathlib/Algebra/Order/Antidiag/Prod.html) - Added explicit `@[to_additive]` target names: - `@[to_additive antidiagonal_congr ...]` for `mulAntidiagonal_congr` - `@[to_additive (attr := ext) antidiagonal_subtype_ext ...]` for `mulAntidiagonal_subtype_ext` - `@[to_additive antidiagonal_congr' ...]` for `mulAntidiagonal_congr'` - `@[to_additive (attr := simps) sigmaAntidiagonalEquivProd ...]` for `sigmaMulAntidiagonalEquivProd` [Multiplication.lean](https://leanprover-community.github.io/mathlib4_docs/Mathlib/RingTheory/HahnSeries/Multiplication.html) - Updated all VAdd antidiagonal references to use lowercase `set` prefix: - `setVAddAntidiagonal` - `mem_setVAddAntidiagonal` - `setVAddAntidiagonal_mono_left`/`setVAddAntidiagonal_mono_right` - `isPWO_support_setVAddAntidiagonal` - `support_setVAddAntidiagonal_subset_vadd` - `setVAddAntidiagonal_min_vadd_min` - Updated all Add antidiagonal references: - `mem_setAddAntidiagonal` - `swap_mem_setAddAntidiagonal` [Summable.lean](https://leanprover-community.github.io/mathlib4_docs/Mathlib/RingTheory/HahnSeries/Summable.html) - `setVAddAntidiagonal` references updated - `mem_setAddAntidiagonal` references updated [PowerSeries.lean](https://leanprover-community.github.io/mathlib4_docs/Mathlib/RingTheory/HahnSeries/PowerSeries.html) - `mem_addAntidiagonal` → `mem_setAddAntidiagonal` t-algebra new-contributor awaiting-author merge-conflict
label:t-algebra$
 67/47 Mathlib/Algebra/Order/Antidiag/Prod.lean,Mathlib/Data/Finset/MulAntidiagonal.lean,Mathlib/Data/Finset/SMulAntidiagonal.lean,Mathlib/Data/Set/MulAntidiagonal.lean,Mathlib/RingTheory/HahnSeries/Multiplication.lean,Mathlib/RingTheory/HahnSeries/Summable.lean 6 8 ['IlPreteRosso', 'Ruben-VandeVelde', 'github-actions', 'jcommelin', 'kim-em', 'mathlib-merge-conflicts'] jcommelin
assignee:jcommelin
12-56891
12 days ago
26-82133
26 days ago
19-5432
19 days
35976 Phelixh
author:Phelixh
 feat: add add Liu's uncertainty theory foundations (core/distribution/process modules) --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor 2320/0 Mathlib/Uncertainty/base.lean,Mathlib/Uncertainty/base_core.lean,Mathlib/Uncertainty/base_distribution.lean,Mathlib/Uncertainty/base_process.lean,Mathlib/Uncertainty/uncertainty.lean 5 26 ['Phelixh', 'copilot-pull-request-reviewer', 'github-actions'] nobody
12-52145
12 days ago
13-76934
13 days ago
0-1739
28 minutes
35559 mike1729
author:mike1729
 feat(Analysis/Normed): weak-topology embedding into weak-star bidual and compactenss transfer theorem This PR refactors the double dual material and adds new results connecting the weak topology on a normed space to the weak-star topology on its bidual. ## Changes ### New file: `Analysis.Normed.Module.DoubleDual` Extracts the canonical embedding `inclusionInDoubleDual` and the bidual isometry `inclusionInDoubleDualLi` from `Analysis.Normed.Module.Dual` into a dedicated file, and adds: - `inclusionInDoubleDualWeak`: the canonical map from `WeakSpace 𝕜 X` into `WeakDual 𝕜 (StrongDual 𝕜 X)`. - `inclusionInDoubleDualWeak_isEmbedding`: this map is a topological embedding. - `inclusionInDoubleDualWeak_homeomorph`: the map as a homeomorphism onto its range. - `isCompact_closure_of_isBounded`: bounded sets whose bidual image has weak-star closure in range have weakly compact closure, via Banach–Alaoglu. ### Modified: `Analysis.Normed.Module.Dual` The double dual inclusion material is moved out; polar set results remain. References to `inclusionInDoubleDual` in `polar_closure` are replaced by `ContinuousLinearMap.apply` to avoid a dependency on the new file. --- CC: @faenuccio this may be relevant for your Goldstine formalization. t-analysis new-contributor 240/91 Mathlib.lean,Mathlib/Analysis/LocallyConvex/SeparatingDual.lean,Mathlib/Analysis/LocallyConvex/Separation.lean,Mathlib/Analysis/Normed/Module/DoubleDual.lean,Mathlib/Analysis/Normed/Module/Dual.lean,Mathlib/Analysis/Normed/Module/WeakDual.lean,Mathlib/Analysis/Normed/Module/WeakSpace.lean,Mathlib/MeasureTheory/Integral/IntervalIntegral/FundThmCalculus.lean,Mathlib/MeasureTheory/Measure/CharacteristicFunction/Basic.lean,Mathlib/Probability/Distributions/Gaussian/CharFun.lean 10 23 ['ADedecker', 'github-actions', 'j-loreaux', 'mathlib-merge-conflicts', 'mike1729'] faenuccio
assignee:faenuccio
11-64840
11 days ago
12-52707
12 days ago
11-12992
11 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 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 79 ['botbaki-review', 'github-actions', 'grunweg', 'michaellee94', 'ocfnash'] ocfnash
assignee:ocfnash
11-51972
11 days ago
13-31885
13 days ago
15-3412
15 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
11-41079
11 days ago
unknown
0-0
0 seconds
35600 yisiox
author:yisiox
 feat(Computability): add Kleene's algorithm to prove regular languages have regex matching This PR adds a proof that every regular language has some regular expression matching it. This was achieved by the following constructions and proofs of their correctness - Define `toSingleεNFA` to transform any epsilon-NFA to an equivalent one with only a single start and accept state (and the type is `ExtendedState`) - Define a bijection between `ExtendedState` and `Fin (FinEnum.card (ExtendedState σ))` to index the states - Define `pathRegex` which implements Kleene's algorithm - Define `toRegex` which takes an epsilon-NFA, applies `toSingleεNFA` on it, and computes the corresponding regex using `pathRegex` The proofs of correctness chain together to yield `(toRegex M).matches' = M.accepts` which asserts the direction of Kleene's theorem required. As in [#mathlib4 > Regular languages: the review queue @ 💬](https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/Regular.20languages.3A.20the.20review.20queue/near/573958148), this overlaps with #15654, which uses GNFA instead but has been inactive. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-computability new-contributor 499/0 Mathlib/Computability/EpsilonNFA.lean 1 2 ['github-actions'] nobody
11-40592
11 days ago
unknown
0-0
0 seconds
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 151/0 Mathlib.lean,Mathlib/Combinatorics/SimpleGraph/Contraction.lean,Mathlib/Combinatorics/SimpleGraph/Minor.lean 3 2 ['github-actions'] nobody
11-23649
11 days ago
11-23711
11 days ago
11-24357
11 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. Co-authored-by: Davood H. H. Tehrani [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) blocked-by-other-PR new-contributor merge-conflict 290/366 Mathlib/Analysis/Normed/Module/PiTensorProduct/InjectiveSeminorm.lean,Mathlib/Analysis/Normed/Module/PiTensorProduct/ProjectiveSeminorm.lean,Mathlib/LinearAlgebra/PiTensorProduct.lean 3 4 ['github-actions', 'mathlib-dependent-issues', 'mathlib-merge-conflicts'] nobody
10-70063
10 days ago
24-57511
24 days ago
0-1492
24 minutes
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
10-64538
10 days ago
603-30562
603 days ago
4-83177
4 days
35900 matthewjasper
author:matthewjasper
 chore: Fix non-defeq diamonds on OrderDual This only makes changes to fix the diamonds, rather than the general defeq abuse with `OrderDual`. --- - [x] depends on: #35995 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor t-order merge-conflict 213/116 Mathlib/Algebra/Field/Basic.lean,Mathlib/Algebra/MonoidAlgebra/Degree.lean,Mathlib/Algebra/Order/Group/Synonym.lean,Mathlib/Algebra/Order/GroupWithZero/Action/Synonym.lean,Mathlib/Algebra/Order/GroupWithZero/Synonym.lean,Mathlib/Algebra/Order/Module/Defs.lean,Mathlib/Algebra/Order/Module/Synonym.lean,Mathlib/Algebra/Order/Ring/Cast.lean,Mathlib/Algebra/Order/Ring/Synonym.lean,Mathlib/Analysis/Convex/Basic.lean,Mathlib/Analysis/Normed/Group/Constructions.lean,Mathlib/Data/Nat/Cast/Synonym.lean,Mathlib/Order/Lattice.lean 13 5 ['github-actions', 'mathlib-dependent-issues', 'mathlib-merge-conflicts'] nobody
10-57729
10 days ago
14-19747
14 days ago
16-6095
16 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
10-53506
10 days ago
59-82033
59 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
10-49213
10 days ago
31-72205
31 days ago
1-52648
1 day
35436 daniel-carranza
author:daniel-carranza
 feat(CategoryTheory/Monoidal/Closed): Prove the isomorphism of internal hom objects C(x \otimes y, z) and C(y, C(x, z)) Prove the currying-uncurrying isomorphism `C(x \otimes y, z) \iso C(y, C(x, z))` between internal hom objects of a closed monoidal category `C`. --- This result is connected to the infinity-cosmos project, and is used to prove that a closed monoidal category enriched in itself admits all cotensors. ~Line 81 currently contains a one-line proof in tactics mode `exact rfl`. When trying to use `rfl` outside of tactics mode, an error is thrown~ (Fixed, thank you @robin-carlier!). Any help with this (or any other aspect of the formalization) is greatly appreciated! [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor t-category-theory infinity-cosmos delegated 89/0 Mathlib.lean,Mathlib/CategoryTheory/Monoidal/Closed/InternalCurrying.lean 2 15 ['dagurtomas', 'daniel-carranza', 'github-actions', 'joelriou', 'mathlib-bors', 'riccardobrasca', 'robin-carlier'] adamtopaz
assignee:adamtopaz
10-40652
10 days ago
18-28791
18 days ago
7-67484
7 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 200/0 Mathlib/Probability/Distributions/Exponential.lean 1 6 ['JoaBjo', 'Timeroot', 'github-actions'] kex-y
assignee:kex-y
10-40616
10 days ago
10-40590
10 days ago
15-85459
15 days
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
10-40606
10 days ago
217-20752
217 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
10-22586
10 days ago
21-37235
21 days ago
47-76964
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
10-22341
10 days ago
60-47854
60 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
10-11061
10 days ago
24-79501
24 days ago
5-13145
5 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 awaiting-author 416/0 Mathlib.lean,Mathlib/NumberTheory/Transcendental/GelfondSchneider/MainAlg.lean 2 5 ['github-actions', 'tb65536'] tb65536
assignee:tb65536
9-71080
9 days ago
20-35767
20 days ago
20-36070
20 days
35970 adrianmartir
author:adrianmartir
 feat(CategoryTheory/Profunctor): Add profunctors and a basic API for them This adds a definition of a profunctor and the definition of a natural transformation between two profunctors. Profunctors are defined as a structure, as suggested by @adamtopaz [on Zulip](https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/Operads.20Formalization/with/566160316). Using this as a base, I wrote a basic API for profunctors. This will be needed for a future formalization of operads. A lot of the API was first drafted by @Aristotle-Harmonic. Co-authored-by: Aristotle (Harmonic) --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-category-theory new-contributor awaiting-author 185/0 Mathlib.lean,Mathlib/CategoryTheory/Profunctor.lean 2 16 ['adrianmartir', 'dagurtomas', 'emilyriehl', 'github-actions', 'joelriou'] nobody
9-54837
9 days ago
14-35152
14 days ago
14-36608
14 days
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 3 ['github-actions'] nobody
9-41714
9 days ago
9-45125
9 days ago
9-45080
9 days
35846 BryceT233
author:BryceT233
 feat(RingTheory/MvPowerSeries): add completeness for `MvPowerSeries` This PR continues the work in #35670 and #35707 by adding typeclass instances for the completeness of `MvPowerSeries` when the index type is finite. --- - [x] depends on: #35789 - [ ] depends on: #35707 - [ ] depends on: #35670 - [ ] depends on: #35597 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-ring-theory new-contributor blocked-by-other-PR 201/0 Mathlib.lean,Mathlib/RingTheory/AdicCompletion/Completeness.lean 2 3 ['github-actions', 'mathlib-dependent-issues'] nobody
7-64383
7 days ago
18-79
18 days ago
0-104
1 minute
36216 michaellee94
author:michaellee94
 feat(CategoryTheory): characterize pullback squares via the `Over` category --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-category-theory new-contributor large-import 47/0 Mathlib/CategoryTheory/Comma/Over/Pullback.lean 1 3 ['github-actions', 'michaellee94'] nobody
7-60392
7 days ago
7-59646
7 days ago
0-2622
43 minutes
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'] kex-y
assignee:kex-y
7-35516
7 days ago
69-57338
69 days ago
69-57293
69 days
35317 mkaratarakis
author:mkaratarakis
 feat: lemmas for the analytic part of the proof of the Gelfond–Schneider theorem (Part 5/5) --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-number-theory new-contributor t-analysis awaiting-author 62/0 Mathlib/Analysis/Complex/CauchyIntegral.lean 1 15 ['MichaelStollBayreuth', 'github-actions', 'mkaratarakis'] MichaelStollBayreuth
assignee:MichaelStollBayreuth
7-33481
7 days ago
24-27207
24 days ago
29-30269
29 days

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 ['leanprover-community-mathlib4-bot', 'urkud'] nobody
64-7135
2 months ago
648-67603
648 days ago
9-15083
9 days
36151 sgouezel
author:sgouezel
 brutal search and replace --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict 1917/1430 Archive/Sensitivity.lean,Archive/Wiedijk100Theorems/Konigsberg.lean,Counterexamples/HeawoodUnitDistance.lean,Counterexamples/HomogeneousPrimeNotPrime.lean,Mathlib.lean,Mathlib/Algebra/Algebra/Subalgebra/Basic.lean,Mathlib/Algebra/Algebra/Subalgebra/Lattice.lean,Mathlib/Algebra/Algebra/ZMod.lean,Mathlib/Algebra/Category/AlgCat/Limits.lean,Mathlib/Algebra/Category/BoolRing.lean,Mathlib/Algebra/Category/CommAlgCat/Basic.lean,Mathlib/Algebra/Category/CommAlgCat/FiniteType.lean,Mathlib/Algebra/Category/CommBialgCat.lean,Mathlib/Algebra/Category/FGModuleCat/Basic.lean,Mathlib/Algebra/Category/FGModuleCat/EssentiallySmall.lean,Mathlib/Algebra/Category/Grp/FiniteGrp.lean,Mathlib/Algebra/Category/Grp/LeftExactFunctor.lean,Mathlib/Algebra/Category/Grp/Limits.lean,Mathlib/Algebra/Category/ModuleCat/ChangeOfRings.lean,Mathlib/Algebra/Category/ModuleCat/ExteriorPower.lean,Mathlib/Algebra/Category/ModuleCat/Limits.lean,Mathlib/Algebra/Category/ModuleCat/Localization.lean,Mathlib/Algebra/Category/ModuleCat/Monoidal/Basic.lean,Mathlib/Algebra/Category/ModuleCat/Presheaf.lean,Mathlib/Algebra/Category/ModuleCat/Presheaf/ChangeOfRings.lean,Mathlib/Algebra/Category/ModuleCat/Presheaf/EpiMono.lean,Mathlib/Algebra/Category/ModuleCat/Presheaf/Monoidal.lean,Mathlib/Algebra/Category/ModuleCat/Presheaf/Sheafification.lean,Mathlib/Algebra/Category/MonCat/Limits.lean,Mathlib/Algebra/Category/Ring/Epi.lean,Mathlib/Algebra/Category/Ring/Limits.lean,Mathlib/Algebra/Colimit/Module.lean,Mathlib/Algebra/DirectSum/Basic.lean,Mathlib/Algebra/DirectSum/Internal.lean,Mathlib/Algebra/EuclideanDomain/Int.lean,Mathlib/Algebra/Field/Subfield/Basic.lean,Mathlib/Algebra/FreeMonoid/Basic.lean,Mathlib/Algebra/GradedMonoid.lean,Mathlib/Algebra/Group/Conj.lean,Mathlib/Algebra/Group/ConjFinite.lean,Mathlib/Algebra/Group/Fin/Basic.lean,Mathlib/Algebra/Group/Subgroup/Actions.lean,Mathlib/Algebra/Group/Submonoid/Membership.lean,Mathlib/Algebra/Homology/BifunctorAssociator.lean,Mathlib/Algebra/Homology/DerivedCategory/Basic.lean,Mathlib/Algebra/Homology/DerivedCategory/ExactFunctor.lean,Mathlib/Algebra/Homology/DerivedCategory/Linear.lean,Mathlib/Algebra/Homology/Embedding/CochainComplex.lean,Mathlib/Algebra/Homology/Embedding/TruncLE.lean,Mathlib/Algebra/Homology/Embedding/TruncLEHomology.lean,Mathlib/Algebra/Homology/HasNoLoop.lean,Mathlib/Algebra/Homology/HomotopyCategory/HomComplexCohomology.lean,Mathlib/Algebra/Homology/HomotopyCategory/SingleFunctors.lean,Mathlib/Algebra/Homology/Monoidal.lean,Mathlib/Algebra/Lie/Abelian.lean,Mathlib/Algebra/Lie/LieTheorem.lean,Mathlib/Algebra/Lie/Quotient.lean,Mathlib/Algebra/Lie/Solvable.lean,Mathlib/Algebra/Lie/Submodule.lean,Mathlib/Algebra/Module/CharacterModule.lean,Mathlib/Algebra/Module/Congruence/Defs.lean,Mathlib/Algebra/Module/LinearMap/Defs.lean,Mathlib/Algebra/Module/LocalizedModule/Basic.lean,Mathlib/Algebra/Module/LocalizedModule/Submodule.lean,Mathlib/Algebra/Module/PUnit.lean,Mathlib/Algebra/Module/Presentation/Finite.lean,Mathlib/Algebra/Module/Torsion/Basic.lean,Mathlib/Algebra/Module/ZLattice/Basic.lean,Mathlib/Algebra/Module/ZLattice/Summable.lean,Mathlib/Algebra/MonoidAlgebra/Defs.lean,Mathlib/Algebra/MvPolynomial/Basic.lean,Mathlib/Algebra/MvPolynomial/Nilpotent.lean,Mathlib/Algebra/Order/Archimedean/Class.lean,Mathlib/Algebra/Order/Group/Synonym.lean,Mathlib/Algebra/Order/GroupWithZero/Canonical.lean,Mathlib/Algebra/Order/Ring/StandardPart.lean,Mathlib/Algebra/Polynomial/Degree/TrailingDegree.lean,Mathlib/Algebra/Polynomial/Module/AEval.lean,Mathlib/Algebra/Polynomial/Module/Basic.lean,Mathlib/Algebra/Quaternion.lean,Mathlib/Algebra/Ring/Action/Subobjects.lean,Mathlib/Algebra/Ring/Defs.lean,Mathlib/Algebra/Ring/Prod.lean,Mathlib/Algebra/Ring/Subring/Basic.lean,Mathlib/Algebra/Ring/Subsemiring/Basic.lean,Mathlib/Algebra/Star/Prod.lean,Mathlib/Algebra/Star/StarAlgHom.lean,Mathlib/Algebra/Star/Unitary.lean,Mathlib/AlgebraicGeometry/AffineScheme.lean,Mathlib/AlgebraicGeometry/AffineSpace.lean,Mathlib/AlgebraicGeometry/AffineTransitionLimit.lean,Mathlib/AlgebraicGeometry/Artinian.lean,Mathlib/AlgebraicGeometry/Cover/Directed.lean,Mathlib/AlgebraicGeometry/Cover/Over.lean,Mathlib/AlgebraicGeometry/Cover/Sigma.lean,Mathlib/AlgebraicGeometry/Gluing.lean,Mathlib/AlgebraicGeometry/Group/Abelian.lean,Mathlib/AlgebraicGeometry/IdealSheaf/Basic.lean,Mathlib/AlgebraicGeometry/IdealSheaf/IrreducibleComponent.lean,Mathlib/AlgebraicGeometry/Limits.lean 570 0 [] nobody
4-65037
4 days ago
11-34407
11 days ago
0-89
1 minute
36582 kim-em
author:kim-em
 feat: run inferInstanceAs% normalization when deriving This PR intercepts `def ... deriving ...` and `deriving instance ... for ...` commands that use the delta deriving handler, and runs the `normalizeInstance` machinery from `inferInstanceAs%` on the synthesized instances. This fixes carrier type leakage at `reducibleAndInstances` transparency for all delta-derived instances across Mathlib. The implementation copies `mkInst` and `processDefDeriving` from `Lean.Elab.Deriving.Basic` (Lean 4.29.0-rc6) and adds the normalization step. This is intentionally a temporary copy: once we settle on the right behavior, it will be upstreamed into Lean 4. - [ ] depends on: #35950 🤖 Prepared with Claude Code large-import blocked-by-other-PR LLM-generated 353/3 Mathlib/Init.lean,Mathlib/Tactic/DerivingInferInstanceAs.lean,Mathlib/Tactic/InferInstanceAsPercent.lean,MathlibTest/DerivingInferInstanceAs.lean 4 2 ['github-actions', 'mathlib-dependent-issues'] nobody
0-54297
15 hours ago
4-7280
4 days ago
0-218
3 minutes

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
593-79151
1 year ago
667-39138
667 days ago
5-74504
5 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 1
593-79148
1 year ago
833-44511
833 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
593-79148
1 year ago
800-37239
800 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 36 ['adomani', 'alreadydone', 'digama0', 'eric-wieser', 'ericrbg', 'jcommelin', 'leanprover-bot', 'sgouezel'] nobody 1
593-79147
1 year ago
868-44644
868 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
593-79146
1 year ago
838-31888
838 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
574-56448
1 year ago
609-62670
609 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
574-45501
1 year ago
584-5263
584 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
499-72305
1 year ago
577-46286
577 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
486-78353
1 year ago
637-73989
637 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
420-74820
1 year ago
420-74820
420 days ago
69-24210
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
410-56840
1 year ago
1058-1979
1058 days ago
51-42225
51 days
19189 YnirPaz
author:YnirPaz
 feat(SetTheory/Ordinal/Arithmetic): order isomorphism between omega and the natural numbers --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict awaiting-author t-set-theory 44/0 Mathlib/Order/SuccPred/Limit.lean,Mathlib/SetTheory/Ordinal/Arithmetic.lean 2 21 ['YaelDillies', 'YnirPaz', 'github-actions', 'vihdzp'] nobody 1
361-11823
11 months ago
436-31464
436 days ago
47-37012
47 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
340-73202
11 months ago
473-61619
473 days ago
1-41769
1 day
8370 eric-wieser
author:eric-wieser
 refactor(Analysis/NormedSpace/Exponential): remove the `𝕂` argument from `exp` This argument is still needed for almost all the lemmas, which means it can longer be found by unification. We keep around `expSeries 𝕂 A`, as it's needed for talking about the radius of convergence over different base fields. This is a prerequisite for #8372, as we can't merge the functions until they have the same interface.\ Zulip thread: [#mathlib4 > Real.exp @ 💬](https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/Real.2Eexp/near/401602245) --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) This is started from the mathport output on https://github.com/leanprover-community/mathlib/pull/19244 merge-conflict t-analysis awaiting-zulip 432/387 Mathlib/Analysis/CStarAlgebra/Exponential.lean,Mathlib/Analysis/CStarAlgebra/Spectrum.lean,Mathlib/Analysis/Normed/Algebra/Exponential.lean,Mathlib/Analysis/Normed/Algebra/MatrixExponential.lean,Mathlib/Analysis/Normed/Algebra/QuaternionExponential.lean,Mathlib/Analysis/Normed/Algebra/Spectrum.lean,Mathlib/Analysis/Normed/Algebra/TrivSqZeroExt.lean,Mathlib/Analysis/NormedSpace/DualNumber.lean,Mathlib/Analysis/SpecialFunctions/ContinuousFunctionalCalculus/ExpLog.lean,Mathlib/Analysis/SpecialFunctions/Exponential.lean,Mathlib/Analysis/SpecialFunctions/Trigonometric/Series.lean 11 29 ['YaelDillies', 'eric-wieser', 'girving', 'github-actions', 'j-loreaux', 'kbuzzard', 'leanprover-community-bot-assistant', 'urkud'] nobody 1
326-19946
10 months ago
347-32588
347 days ago
24-46029
24 days
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
314-29807
10 months ago
391-54830
391 days ago
43-81252
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
311-47881
10 months ago
311-47881
311 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
215-24269
7 months ago
215-24269
215 days ago
71-28496
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'] dagurtomas
assignee:dagurtomas
 1
207-53885
6 months ago
207-53885
207 days ago
64-11252
64 days
28150 Equilibris
author:Equilibris
 chore: clean up proofs typevec proofs While adding variable universe corecs I found a lot of theorems in typevec that could do with a bit of a clean-up --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-data new-contributor 24/26 Mathlib/Data/TypeVec.lean 1 7 ['Equilibris', 'alexkeizer', 'github-actions', 'mathlib4-merge-conflict-bot'] nobody 1
206-24191
6 months ago
206-24192
206 days ago
13-49738
13 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
189-22872
6 months ago
189-53975
189 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
180-73211
5 months ago
206-73996
206 days ago
17-62721
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
171-56725
5 months ago
252-56662
252 days ago
73-13048
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
168-14052
5 months ago
168-14052
168 days ago
48-73998
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
152-4812
5 months ago
152-4812
152 days ago
6-6533
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
151-86288
5 months ago
203-31685
203 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
139-76770
4 months ago
203-36943
203 days ago
2-31233
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
136-60026
4 months ago
215-75561
215 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
117-81864
3 months ago
755-60313
755 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
117-81733
3 months ago
580-29839
580 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
117-81299
3 months ago
387-14658
387 days ago
27-38491
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
117-81289
3 months ago
343-9131
343 days ago
54-54882
54 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
117-81157
3 months ago
364-75170
364 days ago
20-81771
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
117-81131
3 months ago
292-8002
292 days ago
71-48538
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
117-80447
3 months ago
117-80448
117 days ago
133-24576
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
117-80430
3 months ago
119-25821
119 days ago
84-39534
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
117-80135
3 months ago
122-44018
122 days ago
93-44257
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
117-79989
3 months ago
117-79990
117 days ago
71-37436
71 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
117-53169
3 months ago
592-73451
592 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
117-52581
3 months ago
209-49602
209 days ago
7-9588
7 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
109-68389
3 months ago
261-21867
261 days ago
58-34020
58 days
31242 plp127
author:plp127
 feat: express filter as supremum of principal filter and free filter Prove a filter is free iff it is smaller than the cofinite filter. Prove that every filter decomposes as the disjoint supremum of a principal filter and a free filter. --- - [ ] depends on: #31264 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-order awaiting-author merge-conflict 55/0 Mathlib/Order/Filter/Cofinite.lean,Mathlib/Order/Lattice.lean 2 7 ['github-actions', 'jcommelin', 'kckennylau', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot', 'plp127'] bryangingechen
assignee:bryangingechen
 1
102-1952
3 months ago
105-62946
105 days ago
24-22847
24 days
31597 grunweg
author:grunweg
 chore(AtLocation): allow throwing a warning when no progress is being made A future PR will use this to make `by_contra!` and friends warn if the `push_neg` step makes no progress. Co-authored by: Jovan Gerbscheid --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) awaiting-author t-meta merge-conflict 46/28 Mathlib/Tactic/Abel.lean,Mathlib/Tactic/Field.lean,Mathlib/Tactic/FieldSimp.lean,Mathlib/Tactic/NormNum/Core.lean,Mathlib/Tactic/Push.lean,Mathlib/Tactic/ReduceModChar.lean,Mathlib/Tactic/Ring/RingNF.lean,Mathlib/Util/AtLocation.lean,MathlibTest/FieldSimp.lean,MathlibTest/abel.lean 10 7 ['JovanGerb', 'fpvandoorn', 'github-actions', 'mathlib4-merge-conflict-bot', 'thorimur'] thorimur
assignee:thorimur
 2
101-50519
3 months ago
115-48024
115 days ago
7-68323
7 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
101-15118
3 months ago
178-30826
178 days ago
44-10271
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
91-25754
3 months ago
112-61703
112 days ago
60-67125
60 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` --- - [ ] depends on: #21031 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra awaiting-author blocked-by-other-PR merge-conflict
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', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot', 'vihdzp'] nobody 1
79-58127
2 months ago
89-32674
89 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
76-2160
2 months ago
77-57040
77 days ago
0-947
15 minutes
32991 artie2000
author:artie2000
 chore(Algebra/Algebra): remove `Algebra.cast` coercion See discussion at https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/Algebra.2Ecast/with/564501144 --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra merge-conflict
label:t-algebra$
 32/125 Mathlib/Algebra/Algebra/Basic.lean,Mathlib/Algebra/Algebra/Defs.lean,Mathlib/Algebra/Algebra/Field.lean,Mathlib/Algebra/Algebra/Subalgebra/Lattice.lean,Mathlib/Algebra/BigOperators/Expect.lean,Mathlib/Analysis/Normed/Algebra/Ultra.lean,Mathlib/FieldTheory/Differential/Liouville.lean,Mathlib/LinearAlgebra/Ray.lean,Mathlib/RingTheory/Localization/FractionRing.lean 9 11 ['Vierkantor', 'artie2000', 'github-actions', 'mathlib4-merge-conflict-bot', 'plp127', 'vihdzp'] Vierkantor
assignee:Vierkantor
 1
70-46209
2 months ago
88-45267
88 days ago
0-3633
1 hour
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
70-36734
2 months ago
517-83971
517 days ago
9-73631
9 days
32165 yuanyi-350
author:yuanyi-350
 feat(Real/Trigonometric): Add `sum_cos_arith_progression` and prepare for Dirichlet kernel --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-analysis awaiting-author merge-conflict 68/0 Mathlib.lean,Mathlib/Analysis/Fourier/DirichletKernel.lean 2 8 ['BoltonBailey', 'github-actions', 'mathlib4-merge-conflict-bot', 'urkud', 'yuanyi-350'] fpvandoorn
assignee:fpvandoorn
 1
69-25027
2 months ago
106-11809
106 days ago
3-74302
3 days
32401 ADedecker
author:ADedecker
 feat: monotonicity of D^n(U) in n and in U as CLMs --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-analysis delegated 170/3 Mathlib/Analysis/Distribution/ContDiffMapSupportedIn.lean,Mathlib/Analysis/Distribution/TestFunction.lean 2 19 ['ADedecker', 'faenuccio', 'github-actions', 'j-loreaux', 'mathlib-bors', 'mathlib4-merge-conflict-bot'] nobody 1
66-27100
2 months ago
75-31725
75 days ago
16-56139
16 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
65-25627
2 months ago
191-54006
191 days ago
82-7527
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
64-7042
2 months ago
668-62867
668 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 28 ['0xTerencePrime', 'ADedecker', 'github-actions', 'j-loreaux'] ADedecker
assignee:ADedecker
 1
63-39808
2 months ago
63-40029
63 days ago
22-22665
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
61-45451
2 months ago
117-79387
117 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 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 23 ['eric-wieser', 'gio256', 'github-actions', 'joneugster', 'kim-em', 'leanprover-community-bot-assistant', 'mathlib4-dependent-issues-bot'] joneugster
assignee:joneugster
 1
59-56393
2 months ago
239-33533
239 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) [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-differential-geometry merge-conflict awaiting-author 192/21 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 55 ['chrisflav', 'github-actions', 'grunweg', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot', 'sgouezel'] PatrickMassot
assignee:PatrickMassot
 1
57-44367
1 month ago
205-79088
205 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
label:t-algebra$
 4/0 Mathlib/Algebra/Order/Group/Defs.lean 1 8 ['Garmelon', 'Vierkantor', 'artie2000', 'github-actions', 'leanprover-radar'] eric-wieser
assignee:eric-wieser
 2
53-52163
1 month ago
53-52163
53 days ago
40-42357
40 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 58/19 Mathlib/Tactic/Linter/TextBased.lean,scripts/lint-style.lean 2 20 ['Vierkantor', 'adomani', 'github-actions', 'grunweg', 'joneugster', 'leanprover-community-bot-assistant', 'mathlib4-dependent-issues-bot'] joneugster
assignee:joneugster
 1
52-76128
1 month ago
304-50461
304 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 77/10 Mathlib/SetTheory/ZFC/Basic.lean,Mathlib/SetTheory/ZFC/Ordinal.lean,Mathlib/SetTheory/ZFC/PSet.lean 3 25 ['Komyyy', 'github-actions', 'mathlib4-merge-conflict-bot', 'staroperator', 'vihdzp'] alreadydone
assignee:alreadydone
 1
46-40633
1 month ago
46-40695
46 days ago
57-86065
57 days
32570 ksenono
author:ksenono
 feat(Combinatorics/SimpleGraph): bipartite subgraphs and vertex-disjoint graphs for Konig's theorem --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-combinatorics new-contributor 22/0 Mathlib/Combinatorics/SimpleGraph/Bipartite.lean,Mathlib/Combinatorics/SimpleGraph/Subgraph.lean 2 19 ['SnirBroshi', 'github-actions', 'jcommelin', 'ksenono', 'vlad902'] kmill
assignee:kmill
 1
41-28442
1 month ago
41-28442
41 days ago
93-64600
93 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
37-17442
1 month ago
37-17442
37 days ago
35-16104
35 days
34573 Kha
author:Kha
 chore(Analysis/Normed/Lp/SmoothApprox): shake public imports `lake shake --keep-implied --keep-prefix --fix --only Mathlib.Analysis.Normed.Lp.SmoothApprox`, using a dev version of `shake` 7/2 Mathlib/Analysis/Normed/Lp/SmoothApprox.lean,Mathlib/NumberTheory/ModularForms/EisensteinSeries/QExpansion.lean 2 15 ['Garmelon', 'JovanGerb', 'Kha', 'YaelDillies', 'github-actions', 'jcommelin', 'leanprover-radar'] nobody 1
36-37803
1 month ago
36-53391
36 days ago
10-8979
10 days
26985 agjftucker
author:agjftucker
 feat(Analysis/Calculus/ImplicitFunction): define implicitFunctionOfProdDomain This PR continues the work from #16743. Original PR: https://github.com/leanprover-community/mathlib4/pull/16743 --- - [x] depends on: #28352 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-analysis new-contributor 269/157 Mathlib.lean,Mathlib/Analysis/Calculus/Implicit.lean,Mathlib/Analysis/Calculus/ImplicitContDiff.lean,Mathlib/Analysis/Calculus/ImplicitFunction/ProdDomain.lean 4 27 ['agjftucker', 'github-actions', 'j-loreaux', 'mathlib-bors', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot', 'winstonyin'] hrmacbeth
assignee:hrmacbeth
 1
34-80611
1 month ago
34-80611
34 days ago
103-12618
103 days
32744 NoneMore
author:NoneMore
 feat(ModelTheory/Definablity): add `DefinableFun` definition and lemmas This PR adds two basic shapes of definable sets and `DefinableFun` definition with relevant lemmas. The main result is `Set.Definable.preimage_of_map` asserting that the preimage of a definable set under a definable map is definable. There are also some tool lemmas derived by the preimage lemma. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor t-logic 147/0 Mathlib/ModelTheory/Definability.lean 1 59 ['NoneMore', 'github-actions', 'mathlib4-merge-conflict-bot', 'staroperator'] awainverse
assignee:awainverse
 1
34-74647
1 month ago
66-84367
66 days ago
94-36586
94 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 maintainer-merge awaiting-author 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
33-67747
1 month ago
33-67747
33 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
29-57395
1 month ago
678-56595
678 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
29-49315
1 month ago
31-41771
31 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
27-23826
27 days ago
118-75995
118 days ago
24-84527
24 days
30666 erdOne
author:erdOne
 feat(NumberTheory): every number field has a ramified prime --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-number-theory awaiting-author t-algebra
label:t-algebra$
 220/20 Mathlib.lean,Mathlib/Algebra/GroupWithZero/Action/TransferInstance.lean,Mathlib/Algebra/Ring/Int/Field.lean,Mathlib/NumberTheory/NumberField/Basic.lean,Mathlib/NumberTheory/NumberField/Discriminant/Different.lean,Mathlib/NumberTheory/NumberField/ExistsRamified.lean,Mathlib/NumberTheory/RamificationInertia/Basic.lean,Mathlib/RingTheory/Ideal/Norm/AbsNorm.lean,Mathlib/RingTheory/IntegralClosure/IsIntegralClosure/Basic.lean 9 24 ['erdOne', 'github-actions', 'jcommelin', 'mathlib-merge-conflicts', 'mathlib4-merge-conflict-bot', 'tb65536', 'xroblot'] jcommelin
assignee:jcommelin
 1
25-24746
25 days ago
127-57364
127 days ago
13-79962
13 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 23/2 Mathlib/Tactic/Linter/TextBased.lean 1 4 ['github-actions', 'grunweg', 'joneugster', 'vihdzp'] nobody 1
24-50784
24 days ago
25-73464
25 days ago
0-187
3 minutes
34315 LessnessRandomness
author:LessnessRandomness
 feat(Combinatorics/SimpleGraph/Bipartite): Prove upper bound of edge set cardinality of bipartite graph Two ways to express upper bound of the edge set of bipartite graph: 1) If the cardinalities of both parts/sets, that make bipartite graph, are known, then the upper bound is equal to product of the cardinalities of both parts; 2) Four times of the cardinality of the edge set is less or equal to squared cardinality of vertex set. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-combinatorics 53/0 Mathlib/Combinatorics/SimpleGraph/Bipartite.lean 1 55 ['LessnessRandomness', 'SnirBroshi', 'b-mehta', 'github-actions', 'vlad902'] awainverse
assignee:awainverse
 1
23-60714
23 days ago
23-61546
23 days ago
47-69695
47 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 1
21-29796
21 days ago
97-30666
97 days ago
2-78371
2 days
30982 jsm28
author:jsm28
 feat(Geometry/Euclidean/Angle/Incenter): angle bisection and the incenter Add lemmas relating the incenter and excenters of a simplex to angle bisection, both generally for a simplex and more specifically with oriented angles for a triangle. More specific lemmas for a simplex (identifying exactly which excenter corresponds to which bisectors) will require various additional API for bisectors of angles betweeen oriented affine subspaces (but for the most common applications to typical plane geometry problems, I expect the triangle lemmas with oriented angles to be more useful). --- - [ ] depends on: #30474 - [ ] depends on: #30477 - [ ] depends on: #30600 - [ ] depends on: #30703 - [ ] depends on: #30938 - [ ] depends on: #30981 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-euclidean-geometry 269/0 Mathlib.lean,Mathlib/Geometry/Euclidean/Angle/Incenter.lean 2 6 ['Parcly-Taxel', 'github-actions', 'jsm28', 'mathlib-dependent-issues', 'mathlib4-merge-conflict-bot', 'wwylele'] JovanGerb
assignee:JovanGerb
 2
21-17090
21 days ago
34-58778
34 days ago
34-61211
34 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
20-52973
20 days ago
21-12109
21 days ago
5-41003
5 days
34805 DavidLedvinka
author:DavidLedvinka
 feat(Tactic): generalize ofScientific NormNum extension to `DivisionSemiring` Co-authored-by: @hrmacbeth t-meta awaiting-author merge-conflict 68/20 Mathlib/Tactic/NormNum/Inv.lean,Mathlib/Tactic/NormNum/OfScientific.lean,MathlibTest/norm_num.lean 3 25 ['DavidLedvinka', 'JovanGerb', 'b-mehta', 'eric-wieser', 'github-actions', 'mathlib-merge-conflicts', 'thorimur'] JovanGerb
assignee:JovanGerb
 1
20-25756
20 days ago
20-32895
20 days ago
20-41410
20 days
35239 JohnnyTeutonic
author:JohnnyTeutonic
 feat(Logic/Function): add Lawvere fixed-point theorem Adds Lawvere's fixed-point theorem. This is the classical diagonal argument that generalizes \cantor_surjective\ and \cantor_injective\ (both already in Mathlib). The proof is a two-line term-mode construction. t-logic awaiting-author merge-conflict 12/3 Mathlib/Logic/Function/Basic.lean 1 8 ['JohnnyTeutonic', 'github-actions', 'mathlib-merge-conflicts', 'robin-carlier', 'vihdzp'] nobody 1
19-52099
19 days ago
31-43883
31 days ago
0-33100
9 hours
33479 zcyemi
author:zcyemi
 feat(Geometry/Euclidean/Sphere/Power): Add theorem about cospherical points on two intersecting lines --- Add `cospherical_of_mul_dist_eq_mul_dist_of_angle_eq_pi`. ~~This theorem is the converse of `EuclideanGeometry.mul_dist_eq_mul_dist_of_cospherical_of_angle_eq_pi`. However, the ambient type is required to be two-dimensional, i.e. `Fact (finrank ℝ V = 2)`. I don‘t think (not entirely sure) that lifting the ambient space from dimension 2 to arbitrary dimension is reasonable for this theorem, since the proof is entirely carried out in a two-dimensional plane. Therefore, I place this theorem in `Euclidean/Angle/Sphere` rather than `Euclidean/Sphere/Power`.~~ Deps: - [ ] depends on: #33365 large-import t-euclidean-geometry delegated 109/4 Mathlib/Geometry/Euclidean/Sphere/Basic.lean,Mathlib/Geometry/Euclidean/Sphere/Power.lean 2 18 ['github-actions', 'jsm28', 'mathlib-bors', 'mathlib4-dependent-issues-bot', 'ocfnash', 'zcyemi'] JovanGerb
assignee:JovanGerb
 1
18-59601
18 days ago
18-59602
18 days ago
8-70851
8 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
18-17262
18 days ago
20-25751
20 days ago
11-35673
11 days
35656 euprunin
author:euprunin
 chore(ModelTheory): golf proofs This PR removes unused `have`/`haveI`/`let`/`letI` calls. The goal of this golfing PR is to decrease the number of times lemmas are called explicitly (replacing calls to lemmas with calls to tactics). 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): * `FirstOrder.Field.realize_genericMonicPolyHasRoot`: unchanged 🎉 * `FirstOrder.Language.exists_cg_is_age_of`: unchanged 🎉 * `FirstOrder.Language.Theory.models_formula_iff_onTheory_models_equivSentence`: unchanged 🎉 * `FirstOrder.Language.Sentence.realize_cardGe`: unchanged 🎉 * `FirstOrder.Language.Ultraproduct.boundedFormula_realize_cast`: unchanged 🎉 Profiled using `set_option trace.profiler true in`. This golfing PR is batched under the following guidelines: * Up to ~5 changed files per PR * Up to ~25 changed declarations per PR * Up to ~100 changed lines per PR --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-logic 3/16 Mathlib/ModelTheory/Algebra/Field/IsAlgClosed.lean,Mathlib/ModelTheory/Fraisse.lean,Mathlib/ModelTheory/Satisfiability.lean,Mathlib/ModelTheory/Semantics.lean,Mathlib/ModelTheory/Ultraproducts.lean 5 6 ['euprunin', 'github-actions', 'leanprover-radar', 'vihdzp'] nobody 1
17-84846
17 days ago
22-30951
22 days ago
22-30906
22 days
34583 adomani
author:adomani
 feat: basic properties of subnormal subgroups This is a follow up to #34284. Co-authored-by: Inna Capdeboscq --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) large-import t-group-theory 107/3 Mathlib/Algebra/Group/Conj.lean,Mathlib/Algebra/Group/Subgroup/Pointwise.lean,Mathlib/GroupTheory/IsSubnormal.lean 3 38 ['LLaurance', 'adomani', 'github-actions', 'tb65536'] mattrobball
assignee:mattrobball
 1
17-52027
17 days ago
17-51838
17 days ago
33-46995
33 days
35250 vlad902
author:vlad902
 feat(SimpleGraph): redefine `cycleGraph` independent of `circulantGraph` Right now the `cycleGraph` definition relies on `circulantGraph` which requires importing Group definitions from the algebra hierarchy. This causes large-imports for me in later PRs where I try to make more widespread use of cycleGraphs, so here I redefine it to be its own independent object, and leave moving it from `Circulant.lean` to another PR (this is parallel to #35084.) --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-combinatorics 10/10 Mathlib/Combinatorics/SimpleGraph/Circulant.lean 1 4 ['SnirBroshi', 'github-actions', 'vihdzp', 'vlad902'] kmill
assignee:kmill
 2
17-18796
17 days ago
31-61089
31 days ago
31-61044
31 days
35592 SnirBroshi
author:SnirBroshi
 chore(Order/Defs/Unbundled): deprecate `def Transitive` in favor of `class IsTrans` --- [`def Transitive`](https://leanprover-community.github.io/mathlib4_docs/Mathlib/Order/Defs/Unbundled.html#Transitive) [`class IsTrans`](https://leanprover-community.github.io/mathlib4_docs/Mathlib/Order/Defs/Unbundled.html#IsTrans) [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 141/110 Mathlib/Algebra/Group/Semiconj/Defs.lean,Mathlib/CategoryTheory/Abelian/Pseudoelements.lean,Mathlib/CategoryTheory/IsConnected.lean,Mathlib/Combinatorics/SimpleGraph/CompleteMultipartite.lean,Mathlib/Combinatorics/SimpleGraph/FiveWheelLike.lean,Mathlib/Computability/Reduce.lean,Mathlib/Data/List/MinMax.lean,Mathlib/Data/Seq/Computation.lean,Mathlib/Data/WSeq/Relation.lean,Mathlib/GroupTheory/FreeGroup/Basic.lean,Mathlib/LinearAlgebra/LinearIndependent/Lemmas.lean,Mathlib/Logic/Relation.lean,Mathlib/ModelTheory/Order.lean,Mathlib/ModelTheory/Semantics.lean,Mathlib/Order/Defs/Unbundled.lean,Mathlib/Order/Interval/Finset/Basic.lean,Mathlib/Order/Quotient.lean,Mathlib/Order/RelClasses.lean,Mathlib/Topology/Connected/Clopen.lean,Mathlib/Topology/Metrizable/Uniformity.lean 20 1 ['github-actions', 'vihdzp'] pechersky
assignee:pechersky
 1
17-18792
17 days ago
24-13738
24 days ago
24-15305
24 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 merge-conflict 1018/9 Mathlib/Tactic/Linter/Style.lean,MathlibTest/DoubleUnderscore.lean,MathlibTest/HashLint.lean,MathlibTest/Lint.lean,MathlibTest/LintStyle.lean,scripts/nolints.json,scripts/technical-debt-metrics.sh 7 27 ['Vierkantor', 'github-actions', 'grunweg', 'joneugster', 'mathlib-merge-conflicts'] joneugster
assignee:joneugster
 1
16-56504
16 days ago
26-76569
26 days ago
13-82065
13 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 t-algebra new-contributor
label:t-algebra$
 135/0 Mathlib.lean,Mathlib/LinearAlgebra/Matrix/ShermanMorrison.lean 2 11 ['Xxxjdjdid', 'banrovegrie', 'copilot-pull-request-reviewer', 'eric-wieser', 'github-actions', 'wwylele'] kim-em
assignee:kim-em
 1
15-49667
15 days ago
39-53484
39 days ago
39-53439
39 days
31891 jsm28
author:jsm28
 feat(Geometry/Euclidean/Sphere/OrthRadius): lemmas for setting up and using polars Add further lemmas about `orthRadius` that are of use in setting up and using poles and polars. In particular, `ncard_inter_orthRadius_eq_two_of_dist_lt_radius` is the key part of showing that, in two dimensions, there are exactly two tangents to a circle from a point outside that circle (where the points of tangency lie on the polar of the point from which the two tangents are drawn). --- Feel free to golf the proof of `ncard_inter_orthRadius_eq_two_of_dist_lt_radius`, it could probably be rather shorter. --- - [ ] depends on: #32296 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-euclidean-geometry 265/7 Mathlib/Geometry/Euclidean/Sphere/OrthRadius.lean,Mathlib/Geometry/Euclidean/Sphere/Tangent.lean 2 28 ['Parcly-Taxel', 'eric-wieser', 'github-actions', 'jsm28', 'mathlib-merge-conflicts', 'mathlib4-dependent-issues-bot'] JovanGerb
assignee:JovanGerb
 1
15-18615
15 days ago
26-61513
26 days ago
114-82695
114 days
35627 SnirBroshi
author:SnirBroshi
 feat(Combinatorics/SimpleGraph/Finite): min/max degrees of top/bot And a couple of lemmas about `IsRegularOfDegree`, e.g. the empty graph is regular of any degree. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-combinatorics 28/1 Mathlib/Combinatorics/SimpleGraph/Finite.lean,Mathlib/Combinatorics/SimpleGraph/StronglyRegular.lean 2 6 ['SnirBroshi', 'github-actions', 'vlad902'] nobody 1
13-1896
13 days ago
23-8645
23 days ago
23-8600
23 days
26975 Whysoserioushah
author:Whysoserioushah
 feat: a norm_num extension for complex numbers co-authored-by : @thefundamentaltheor3m, @hrmacbeth --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-meta awaiting-author 424/12 Mathlib.lean,Mathlib/Analysis/RCLike/Basic.lean,Mathlib/Tactic.lean,Mathlib/Tactic/NormNum/Eq.lean,Mathlib/Tactic/NormNum/NormNumI.lean,Mathlib/Tactic/NormNum/Result.lean,MathlibTest/norm_numI.lean 7 57 ['JovanGerb', 'Vierkantor', 'Whysoserioushah', 'dupuisf', 'eric-wieser', 'github-actions', 'grunweg', 'hrmacbeth', 'mathlib4-merge-conflict-bot'] Vierkantor
assignee:Vierkantor
 1
12-57162
12 days ago
12-57162
12 days ago
112-29409
112 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
11-38115
11 days ago
133-38976
133 days ago
23-31743
23 days
34245 staroperator
author:staroperator
 feat(Data/Set): add `Set.Uncountable` There are `Set` specialized shortcuts `Set.Finite`, `Set.Infinite` and `Set.Countable`, but lacking `Set.Uncountable`. I find this useful in #34246. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-data awaiting-zulip 82/4 Mathlib/Analysis/Real/Cardinality.lean,Mathlib/Data/Set/Countable.lean,Mathlib/SetTheory/Cardinal/Basic.lean 3 17 ['github-actions', 'joneugster', 'staroperator', 'vihdzp'] joneugster
assignee:joneugster
 1
10-72764
10 days ago
41-46011
41 days ago
12-21154
12 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
10-64507
10 days ago
270-64246
270 days ago
91-69159
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
10-64490
10 days ago
482-18725
482 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
10-53506
10 days ago
59-82033
59 days ago
10-68503
10 days
33972 YuvalFilmus
author:YuvalFilmus
 feat(Analysis/Polynomial/Order): polynomial has fixed sign beyond largest root We prove that a polynomial has fixed sign beyond its largest root. One could also prove similar results about the smallest root, but they will be more awkward since they will depend on the parity of the (natural) degree; suggestions welcome (perhaps for a future PR). --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-analysis awaiting-zulip 134/0 Mathlib.lean,Mathlib/Analysis/Polynomial/Order.lean 2 14 ['YuvalFilmus', 'artie2000', 'github-actions', 'mathlib-merge-conflicts', 'urkud', 'vihdzp'] ADedecker and urkud
assignee:urkud assignee:ADedecker
 1
10-45823
10 days ago
21-49930
21 days ago
39-23486
39 days
35760 astrainfinita
author:astrainfinita
 chore: deprecate `ConditionallyCompleteLinearOrderedField` Use the new mixin typeclass instead. Also, move the API for conditionally complete linear ordered fields into the `ConditionallyCompleteLinearOrderedField` namespace, and make instances scoped to this namespace. We should usually use `ℝ` instead. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra t-order maintainer-merge
label:t-algebra$
 124/52 Mathlib.lean,Mathlib/Algebra/Order/CompleteField.lean,Mathlib/Algebra/Order/Ring/StandardPart.lean,Mathlib/Data/Real/CompleteField.lean,Mathlib/Data/Real/Hom.lean 5 6 ['Vierkantor', 'astrainfinita', 'github-actions', 'leanprover-radar'] Vierkantor
assignee:Vierkantor
 1
9-77121
9 days ago
11-56842
11 days ago
19-49913
19 days
35654 euprunin
author:euprunin
 chore: golf using `grind` The goal of this golfing PR is to decrease the number of times lemmas are called explicitly (replacing calls to lemmas with calls to tactics). 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): * `CochainComplex.HomComplex.mem_coboundaries_iff`: unchanged 🎉 * `integral_cos_mul_complex`: unchanged 🎉 * `List.next_getLast_cons`: unchanged 🎉 * `foldl_argAux_mem`: unchanged 🎉 * `Equiv.Perm.support_swap`: unchanged 🎉 * `Fermat42.mul`: unchanged 🎉 * `Filter.high_scores`: 155 ms before, 108 ms after 🎉 * `IocProdIoc_preimage`: unchanged 🎉 Profiled using `set_option trace.profiler true in`. This golfing PR is batched under the following guidelines: * Up to ~5 changed files per PR * Up to ~25 changed declarations per PR * Up to ~100 changed lines per PR --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) 8/41 Mathlib/Algebra/Homology/HomotopyCategory/HomComplexCohomology.lean,Mathlib/Analysis/SpecialFunctions/Integrals/Basic.lean,Mathlib/Data/List/MinMax.lean,Mathlib/GroupTheory/Perm/Support.lean,Mathlib/NumberTheory/FLT/Four.lean,Mathlib/Probability/Kernel/IonescuTulcea/Maps.lean 6 4 ['euprunin', 'github-actions', 'mathlib-merge-conflicts', 'vihdzp'] kex-y
assignee:kex-y
 1
8-38118
8 days ago
8-38143
8 days ago
21-36916
21 days
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 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
 1
7-18795
7 days ago
367-54146
367 days ago
15-14325
15 days
35677 euprunin
author:euprunin
 chore(SetTheory): golf proofs This PR removes unused `have`/`haveI`/`let`/`letI` calls + some small similar cleanups. The goal of this golfing PR is to decrease the number of times lemmas are called explicitly (replacing calls to lemmas with calls to tactics). 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): * `Cardinal.mul_eq_self`: unchanged 🎉 * `Cardinal.succ_natCast`: unchanged 🎉 * `Ordinal.exists_fundamental_sequence`: unchanged 🎉 * `Cardinal.mk_subtype_le_of_countable_eventually_mem`: unchanged 🎉 * `Nat.card_image_of_injOn`: unchanged 🎉 * `mul_le_of_limit_aux`: unchanged 🎉 Profiled using `set_option trace.profiler true in`. This golfing PR is batched under the following guidelines: * Up to ~5 changed files per PR * Up to ~25 changed declarations per PR * Up to ~100 changed lines per PR --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-set-theory 2/11 Mathlib/SetTheory/Cardinal/Arithmetic.lean,Mathlib/SetTheory/Cardinal/Basic.lean,Mathlib/SetTheory/Cardinal/Cofinality.lean,Mathlib/SetTheory/Cardinal/CountableCover.lean,Mathlib/SetTheory/Cardinal/Finite.lean,Mathlib/SetTheory/Ordinal/Arithmetic.lean,Mathlib/SetTheory/ZFC/PSet.lean 7 4 ['euprunin', 'github-actions', 'leanprover-radar', 'vihdzp'] alreadydone
assignee:alreadydone
 1
7-18788
7 days ago
21-79924
21 days ago
21-79879
21 days
34249 xyzw12345
author:xyzw12345
 feat(GroupTheory/GroupAction/Hom): connect existing definitions `MulDistribMulActionHom` and `DistribMulActionHom` using `to_additive` In this PR, we defined `MulDistribMulActionHom` corresponding to `DistribMulActionHom`, which will be used in the multiplicative version of non-Abelian group cohomology. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra delegated awaiting-author
label:t-algebra$
 174/69 Mathlib/Algebra/GroupWithZero/Action/Defs.lean,Mathlib/GroupTheory/GroupAction/Hom.lean 2 7 ['github-actions', 'mathlib-bors', 'ocfnash'] ocfnash
assignee:ocfnash
 1
6-35729
6 days ago
24-47947
24 days ago
29-31450
29 days
34637 mcdoll
author:mcdoll
 feat(Analysis/Distribution): support We define the support of distributions. The definition applies to both tempered and classical distributions, but for this PR we only prove some elementary statements for tempered distributions. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-analysis 255/0 Mathlib.lean,Mathlib/Analysis/Distribution/Support.lean,Mathlib/Topology/MetricSpace/Bounded.lean 3 21 ['ADedecker', 'github-actions', 'lauramonk', 'mcdoll', 'urkud'] ADedecker
assignee:ADedecker
 1
6-27083
6 days ago
7-47363
7 days ago
32-59547
32 days
35649 JovanGerb
author:JovanGerb
 feat(Order/GaloisConnection/Defs): use `to_dual` for `GaloisInsertion`/`GaloisCoinsertion` This PR uses `to_dual` to generate declarations about `GaloisCoinsertion` from those for `GaloisInsertion`. - An entry is added to the name translation dictionary for this particular name translation. - One lemma in another file had to be tagged. - Some uses of `to_dual` have been replaced with `to_dual none`, because I had written them before `to_dual none` existed. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-order 42/84 Mathlib/Algebra/Group/Submonoid/Units.lean,Mathlib/Order/GaloisConnection/Defs.lean,Mathlib/Order/Monotone/Defs.lean,Mathlib/Tactic/Translate/ToDual.lean,Mathlib/Topology/Order.lean 5 5 ['JovanGerb', 'github-actions', 'mathlib-merge-conflicts', 'vihdzp'] nobody 1
6-20568
6 days ago
6-20597
6 days ago
9-56831
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 53/0 Mathlib.lean,Mathlib/RingTheory/Localization/Saturation.lean 2 11 ['alreadydone', 'chrisflav', 'github-actions', 'kckennylau', 'mathlib-dependent-issues', 'mathlib4-merge-conflict-bot'] mattrobball
assignee:mattrobball
 1
6-18787
6 days ago
11-51730
11 days ago
11-53571
11 days
35709 tb65536
author:tb65536
 feat(AlgebraicGeometry/EllipticCurve/Reduction): define multiplicative and additive reduction This PR adds definitions of multiplicative and additive reduction. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra t-algebraic-geometry t-number-theory
label:t-algebra$
 86/5 Mathlib/AlgebraicGeometry/EllipticCurve/Reduction.lean 1 6 ['Multramate', 'github-actions', 'tb65536'] riccardobrasca
assignee:riccardobrasca
 1
6-18782
6 days ago
20-79323
20 days ago
20-79279
20 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'` --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-logic 161/136 Mathlib.lean,Mathlib/Algebra/Category/Grp/FilteredColimits.lean,Mathlib/Algebra/Category/ModuleCat/FilteredColimits.lean,Mathlib/Algebra/Category/MonCat/FilteredColimits.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/Data/PFunctor/Multivariate/M.lean,Mathlib/Data/Quot.lean,Mathlib/FieldTheory/PerfectClosure.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 25 15 ['SnirBroshi', 'github-actions', 'mathlib-merge-conflicts', 'mathlib4-merge-conflict-bot', 'thorimur', 'vihdzp'] thorimur
assignee:thorimur
 1
6-795
6 days ago
6-822
6 days ago
52-25203
52 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 awaiting-author 199/0 Mathlib.lean,Mathlib/Combinatorics/SimpleGraph/Connectivity/VertexConnectivity.lean,Mathlib/Combinatorics/SimpleGraph/IsolateVerts.lean 3 138 ['0xTerencePrime', 'SnirBroshi', 'SproutSeeds', 'YaelDillies', 'github-actions', 'vihdzp'] YaelDillies
assignee:YaelDillies
 1
4-74453
4 days ago
19-12103
19 days ago
40-44712
40 days
36166 wwylele
author:wwylele
 feat(Data/Nat): formula for cardinal of finsuppAntidiag on Nat Co-authored-by: Bingyu Xia --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) maintainer-merge 82/0 Mathlib.lean,Mathlib/Algebra/Order/Antidiag/FinsuppEquiv.lean 2 16 ['BryceT233', 'copilot-pull-request-reviewer', 'github-actions', 'tb65536', 'wwylele'] tb65536
assignee:tb65536
 1
4-67188
4 days ago
5-25904
5 days ago
11-2502
11 days
26770 Jun2M
author:Jun2M
 feat(Combinatorics/Graph): subgraph relations on `Graph` This PR creates a new file `Combinatorics/Graph/Subgraph.lean`. In it, the PR introduces a partial order on graphs by subgraph relation, defines relations `IsInducedSubgraph`, `IsSpanningSubgraph` and `IsClosedSubgraph`. Co-authored-by: Peter Nelson --- - [x] depends on: #34783 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-combinatorics maintainer-merge 362/0 Mathlib.lean,Mathlib/Combinatorics/Graph/Subgraph.lean 2 81 ['Jun2M', 'YaelDillies', 'github-actions', 'lauramonk', 'mathlib-dependent-issues', 'mathlib4-merge-conflict-bot'] YaelDillies
assignee:YaelDillies
 2
4-47457
4 days ago
10-46667
10 days ago
169-8271
169 days
35622 SnirBroshi
author:SnirBroshi
 feat(Logic/Function/Basic): `onFun` and `swap` preserve relation properties --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-logic 141/19 Mathlib/Data/DFinsupp/WellFounded.lean,Mathlib/Logic/Function/Basic.lean,Mathlib/Logic/Function/Defs.lean,Mathlib/Order/Defs/Unbundled.lean,Mathlib/Order/OrderIsoNat.lean,Mathlib/Order/RelClasses.lean,Mathlib/Order/WellFounded.lean,Mathlib/Order/WithBot.lean 8 7 ['SnirBroshi', 'github-actions', 'leanprover-radar', 'vihdzp'] nobody 1
4-44217
4 days ago
11-9210
11 days ago
22-79416
22 days
35867 edegeltje
author:edegeltje
 feat(CategoryTheory/Topos): Define subobject classifier for sheaf of types This PR defines `Sheaf.classifier J : Classifier (Sheaf J (Type (max u v))`, which is the last ingredient missing to sheaf categories being elementary topoi. adapted from: https://github.com/edegeltje/CwFTT/blob/591d4505390172ae70e1bc97544d293a35cc0b3f/CwFTT/Classifier/Sheaf.lean --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-category-theory maintainer-merge 309/37 Mathlib.lean,Mathlib/CategoryTheory/Limits/Shapes/IsTerminal.lean,Mathlib/CategoryTheory/Limits/Types/Products.lean,Mathlib/CategoryTheory/Sites/Closed.lean,Mathlib/CategoryTheory/Sites/Sheaf.lean,Mathlib/CategoryTheory/Topos/Sheaf.lean 6 68 ['chrisflav', 'dagurtomas', 'edegeltje', 'github-actions', 'joelriou', 'mathlib-merge-conflicts', 'mathlib-splicebot', 'robin-carlier'] chrisflav
assignee:chrisflav
 1
4-28397
4 days ago
4-41645
4 days ago
14-55516
14 days
36338 harahu
author:harahu
 doc(Algebra): fix typos Found by `PyCharm`'s code inspection tool. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra documentation
label:t-algebra$
 30/30 Mathlib/Algebra/Algebra/Hom.lean,Mathlib/Algebra/Category/ModuleCat/Ulift.lean,Mathlib/Algebra/FiniteSupport/Basic.lean,Mathlib/Algebra/FiniteSupport/Defs.lean,Mathlib/Algebra/Group/Action/End.lean,Mathlib/Algebra/Group/Hom/Defs.lean,Mathlib/Algebra/Homology/BifunctorShift.lean,Mathlib/Algebra/Homology/CochainComplexPlus.lean,Mathlib/Algebra/Homology/DerivedCategory/Ext/Map.lean,Mathlib/Algebra/Homology/Embedding/ExtendHomotopy.lean,Mathlib/Algebra/Homology/HomologicalBicomplex.lean,Mathlib/Algebra/Homology/HomotopyCategory/HomComplexSingle.lean,Mathlib/Algebra/Homology/HomotopyCategory/Pretriangulated.lean,Mathlib/Algebra/Homology/HomotopyCategory/SingleFunctors.lean,Mathlib/Algebra/Homology/ModelCategory/Lifting.lean,Mathlib/Algebra/Lie/CartanExists.lean,Mathlib/Algebra/Lie/Derivation/Basic.lean,Mathlib/Algebra/Lie/EngelSubalgebra.lean,Mathlib/Algebra/NonAssoc/LieAdmissible/Defs.lean,Mathlib/Algebra/Order/Antidiag/Prod.lean,Mathlib/Algebra/Order/Hom/Monoid.lean,Mathlib/Algebra/Order/SuccPred/TypeTags.lean,Mathlib/Algebra/Polynomial/PartialFractions.lean 23 3 ['euprunin', 'github-actions', 'harahu', 'mathlib-merge-conflicts', 'plp127'] dagurtomas
assignee:dagurtomas
 2
4-18765
4 days ago
8-47739
8 days ago
9-24057
9 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 22 ['Parcly-Taxel', 'b-mehta', 'eric-wieser', 'github-actions', 'jsm28', 'vihdzp'] kmill
assignee:kmill
 1
4-8626
4 days ago
62-35892
62 days ago
62-35847
62 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 13/0 Mathlib/Combinatorics/SimpleGraph/Paths.lean,Mathlib/Combinatorics/SimpleGraph/Walks/Operations.lean 2 7 ['Rida-Hamadani', 'SnirBroshi', 'github-actions', 'mathlib-merge-conflicts', 'vlad902'] nobody 1
3-55348
3 days ago
3-55315
3 days ago
19-67433
19 days
36560 harahu
author:harahu
 doc(FieldTheory): fix typos Found by `PyCharm`'s code inspection tool. Fixes were made by Codex. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra
label:t-algebra$
 15/14 Mathlib/FieldTheory/IntermediateField/Adjoin/Algebra.lean,Mathlib/FieldTheory/Minpoly/MinpolyDiv.lean,Mathlib/FieldTheory/RatFunc/Luroth.lean,Mathlib/FieldTheory/SeparablyGenerated.lean 4 2 ['github-actions', 'vihdzp'] nobody 1
3-46452
3 days ago
3-46131
3 days ago
0-75550
20 hours
35771 euprunin
author:euprunin
 chore: golf using `exact` The goal of this PR is to decrease the number of times lemmas are called explicitly (replacing calls to lemmas with calls to tactics). 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): * `IsBaseChange.comp`: 132 ms before, 98 ms after 🎉 * `Cardinal.powerlt_aleph0`: unchanged 🎉 * `ONote.fastGrowing_one`: unchanged 🎉 Profiled using `set_option trace.profiler true in`. This PR is batched under the following guidelines: * Up to ~5 changed files per PR * Up to ~25 changed declarations per PR * Up to ~100 changed lines per PR --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) 3/11 Mathlib/RingTheory/IsTensorProduct.lean,Mathlib/SetTheory/Cardinal/Arithmetic.lean,Mathlib/SetTheory/Ordinal/Notation.lean 3 1 ['github-actions', 'vihdzp'] robin-carlier
assignee:robin-carlier
 1
3-18774
3 days ago
19-48333
19 days ago
19-48288
19 days
36374 EtienneC30
author:EtienneC30
 refactor: define the Poisson measure via a sum of Dirac masses Change the definition of `poissonMeasure r` to be `Measure.sum (fun n ↦ ENNReal.ofReal (exp (-r) * r ^ n / (n)!) • (.dirac n))` instead of using `PMF`. This allows to directly use API for measures instead of having to develop an API for `PMF`, which anyway is defined as a sum of Dirac masses. Also add some results about integrals against the poissonMeasure. --- - [x] depends on: #36355 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-measure-probability large-import 105/30 Mathlib/MeasureTheory/Measure/Dirac.lean,Mathlib/Probability/Distributions/Poisson/Basic.lean,Mathlib/Probability/Distributions/Poisson/PoissonLimitThm.lean 3 11 ['DavidLedvinka', 'EtienneC30', 'b-mehta', 'github-actions', 'mathlib-dependent-issues'] kex-y
assignee:kex-y
 1
3-18765
3 days ago
7-43383
7 days ago
7-57371
7 days
36618 SnirBroshi
author:SnirBroshi
 feat(Order/RelClasses): `IsTrans` is redundant in `IsWellOrder` --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-order 13/14 Mathlib/Order/RelClasses.lean,Mathlib/SetTheory/ZFC/Ordinal.lean 2 1 ['github-actions', 'vihdzp'] nobody 1
3-18636
3 days ago
3-18698
3 days ago
3-21756
3 days
36612 JovanGerb
author:JovanGerb
 chore(Order/SuccPred/Basic): use `to_dual` more When this file was originally tagged with `to_dual`, the attribute was less capable. Now, we can tag almost everything in the file. This PR does the first half of the remaining tagging. The rest can be done in a future PR. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-order 35/150 Mathlib/Order/SuccPred/Basic.lean 1 1 ['github-actions', 'vihdzp'] nobody 1
3-18076
3 days ago
3-38048
3 days ago
3-38003
3 days
35616 SnirBroshi
author:SnirBroshi
 feat(Combinatorics/SimpleGraph/Copy): `IsContained` and `IsIndContained` are preorders This makes `calc` work and provides `Std.Refl` and `IsTrans` instances. `grw` still doesn't work and mixing the two predicates in `calc` (to prove `IsContained`) also doesn't work. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-combinatorics maintainer-merge 20/0 Mathlib/Combinatorics/SimpleGraph/Copy.lean 1 2 ['YaelDillies', 'github-actions'] YaelDillies
assignee:YaelDillies
 1
2-80963
2 days ago
23-22485
23 days ago
23-22440
23 days
36471 eric-wieser
author:eric-wieser
 feat: more API for Function.IsPartialInv This also renames some lemmas to enable dot notation. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-logic maintainer-merge 33/22 Mathlib/Data/Set/Finite/Basic.lean,Mathlib/Logic/Encodable/Basic.lean,Mathlib/Logic/Function/Basic.lean 3 13 ['Komyyy', 'eric-wieser', 'github-actions'] nobody 1
2-73520
2 days ago
4-18720
4 days ago
5-23045
5 days
35360 vlad902
author:vlad902
 chore: rename `cycleGraph_EulerianCircuit` to `cycleGraph.cycle` Per [this](https://github.com/leanprover-community/mathlib4/pull/34797#discussion_r2807963752) review feedback, this definition is inappropriately named with an underscore and should be renamed. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-combinatorics maintainer-merge 21/17 Mathlib/Combinatorics/SimpleGraph/Circulant.lean,Mathlib/Combinatorics/SimpleGraph/ConcreteColorings.lean 2 6 ['YaelDillies', 'github-actions', 'vlad902'] YaelDillies
assignee:YaelDillies
 1
2-61283
2 days ago
2-80925
2 days ago
29-7255
29 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
2-49210
2 days ago
117-80285
117 days ago
114-38193
114 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
2-49144
2 days ago
46-37385
46 days ago
59-63981
59 days
35451 samueloettl
author:samueloettl
 feat(MeasureTheory.Function): compMeasurePreserving_iterate --- These are useful for dynamics/ergodic theory. Possibly some of these could be simp lemmas but I'm not confident enough to say that they are so I didn't mark them as such. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor t-measure-probability 113/2 Mathlib/MeasureTheory/Function/AEEqFun.lean,Mathlib/MeasureTheory/Function/LpSpace/Basic.lean,Mathlib/MeasureTheory/Measure/QuasiMeasurePreserving.lean,Mathlib/Order/Filter/Basic.lean 4 33 ['ADedecker', 'EtienneC30', 'github-actions', 'samueloettl'] ADedecker
assignee:ADedecker
 1
2-21752
2 days ago
2-72501
2 days ago
22-45642
22 days
36655 plp127
author:plp127
 chore(IsFractionRing): make argument explicit Makes the base ring an explicit argument in `IsFractionRing.div_surjective`. This argument cannot be inferred by typeclass inference, because the base ring is not an `outParam` or `semiOutParam` in the type of `IsFractionRing`. It is also rarely determined by the expected type, since this is typically used as the discriminant for an `obtain` or `rcases`. Also update every usage of `IsFractionRing.div_surjective` to take advantage of this explicit argument. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-ring-theory 25/24 Mathlib/Algebra/Algebra/Epi.lean,Mathlib/FieldTheory/Galois/IsGaloisGroup.lean,Mathlib/NumberTheory/NumberField/Completion/FinitePlace.lean,Mathlib/NumberTheory/NumberField/ProductFormula.lean,Mathlib/NumberTheory/RamificationInertia/HilbertTheory.lean,Mathlib/RingTheory/Invariant/Basic.lean,Mathlib/RingTheory/Localization/AsSubring.lean,Mathlib/RingTheory/Localization/FractionRing.lean,Mathlib/RingTheory/Localization/Integral.lean,Mathlib/RingTheory/Valuation/Discrete/Basic.lean,Mathlib/RingTheory/Valuation/ValuationRing.lean 11 1 ['github-actions', 'vihdzp'] nobody 1
2-6933
2 days ago
2-21072
2 days ago
2-21264
2 days
36585 vihdzp
author:vihdzp
 feat: order type of `Iio o` is `lift o` Downstreamed from the CGT repo. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-set-theory 18/16 Mathlib/SetTheory/Ordinal/Arithmetic.lean,Mathlib/SetTheory/Ordinal/Basic.lean,Mathlib/SetTheory/Ordinal/Family.lean,Mathlib/SetTheory/ZFC/Ordinal.lean,Mathlib/SetTheory/ZFC/VonNeumann.lean 5 4 ['SnirBroshi', 'github-actions', 'vihdzp'] nobody 1
2-2341
2 days ago
2-2407
2 days ago
2-62447
2 days
36473 AlexeyMilovanov
author:AlexeyMilovanov
 feat(Computability.Primrec.List): add primrec proofs for drop, takeWhile, and dropWhile This PR adds missing proofs that several standard `List` operations are primitive recursive (Primrec), as well as a basic property of `tail` and `drop`. Specifically, it introduces: * `List.tail_iterate`: Applying `tail` to a list `n` times is equivalent to dropping `n` elements. * `Primrec.list_drop`: `List.drop` is primitive recursive. * `Primrec.list_take`: `List.take` is primitive recursive. * `Primrec.list_takeWhile`: `List.takeWhile` is primitive recursive. * `Primrec.list_dropWhile`: `List.dropWhile` is primitive recursive. These are basic computability properties for lists that were currently missing from `Mathlib.Computability.Primrec.List`. All proofs use standard combinators and `of_eq`. t-computability new-contributor maintainer-merge 27/0 Mathlib/Computability/Primrec/List.lean,Mathlib/Data/List/TakeDrop.lean 2 23 ['AlexeyMilovanov', 'Komyyy', 'github-actions'] nobody 1
1-73890
1 day ago
1-77184
1 day ago
5-10911
5 days
36024 euprunin
author:euprunin
 chore: golf proofs The goal of this PR is to decrease the number of times lemmas are called explicitly (replacing calls to lemmas with calls to tactics). 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): * `Fin.coe_sub_one`: unchanged 🎉 * `LieAlgebra.engel_isBot_of_isMin.lieCharpoly_coeff_natDegree`: 66 ms before, 35 ms after 🎉 * `WithTop.mul_lt_mul`: unchanged 🎉 * `CFC.spectrum_nonempty`: unchanged 🎉 * `ODE.hasDerivWithinAt_picard_Icc`: unchanged 🎉 * `Matrix.vecMul_injective_iff_isUnit`: 240 ms before, 68 ms after 🎉 * `MeasureTheory.SimpleFunc.measure_preimage_lt_top_of_memLp`: unchanged 🎉 * `Polynomial.content_eq_gcd_range_of_lt`: unchanged 🎉 * `RingHom.finiteType_isStableUnderBaseChange`: 163 ms before, 49 ms after 🎉 * `RingHom.Flat.holdsForLocalizationAway`: 91 ms before, <30 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/) maintainer-merge 20/46 Mathlib/Algebra/Group/Fin/Basic.lean,Mathlib/Algebra/Lie/CartanExists.lean,Mathlib/Algebra/Order/Ring/WithTop.lean,Mathlib/Analysis/CStarAlgebra/ContinuousFunctionalCalculus/Instances.lean,Mathlib/Analysis/CStarAlgebra/ContinuousFunctionalCalculus/Order.lean,Mathlib/Analysis/CStarAlgebra/ContinuousFunctionalCalculus/Unital.lean,Mathlib/Analysis/ODE/PicardLindelof.lean,Mathlib/LinearAlgebra/Matrix/NonsingularInverse.lean,Mathlib/MeasureTheory/Function/SimpleFuncDenseLp.lean,Mathlib/RingTheory/Polynomial/Content.lean,Mathlib/RingTheory/RingHom/FiniteType.lean,Mathlib/RingTheory/RingHom/Flat.lean 12 14 ['euprunin', 'github-actions', 'mathlib-merge-conflicts', 'tb65536', 'vihdzp'] tb65536
assignee:tb65536
 1
1-60113
1 day ago
8-33853
8 days ago
12-23835
12 days
35947 euprunin
author:euprunin
 chore: replace `aesop` with `grind` where the latter is significantly faster This experiment investigates the impact of replacing particularly heavy `aesop` calls with `grind`, specifically how this change affects the instruction count as measured by the benchmarking infrastructure. Trace profiling results (differences <30 ms considered measurement noise): * `Submonoid.mem_closure_image_one_lt_iff`: 125 ms before, 61 ms after 🎉 * `SimpleGraph.Connected.connected_delete_edge_of_not_isBridge`: 230 ms before, 51 ms after 🎉 * `SimpleGraph.Subgraph.IsMatching.exists_of_disjoint_sets_of_equiv`: 899 ms before, 666 ms after 🎉 * `SimpleGraph.IsCycles.existsUnique_ne_adj`: 855 ms before, 599 ms after 🎉 * `SimpleGraph.Walk.IsPath.isCycles_spanningCoe_toSubgraph_sup_edge`: 962 ms before, 619 ms after 🎉 * `SimpleGraph.IsAlternating.sup_edge`: 2854 ms before, 1615 ms after 🎉 * `SimpleGraph.Subgraph.IsPerfectMatching.symmDiff_of_isAlternating`: 3103 ms before, 1734 ms after 🎉 * `SimpleGraph.edgeSet_replaceVertex_of_not_adj`: 1525 ms before, 933 ms after 🎉 * `SimpleGraph.edgeSet_replaceVertex_of_adj`: 2194 ms before, 1605 ms after 🎉 * `SimpleGraph.tutte_exists_isPerfectMatching_of_near_matchings`: 3161 ms before, 1652 ms after 🎉 * `RootPairing.Base.sub_notMem_range_root`: 1025 ms before, 978 ms after 🎉 * `RootPairing.EmbeddedG2.mem_allRoots`: 3832 ms before, 3255 ms after 🎉 * `RootSystem.GeckConstruction.Lemmas.0.RootPairing.chainBotCoeff_mul_chainTopCoeff.aux_2`: 3572 ms before, 2631 ms after 🎉 * `isCompact_generateFrom`: 1987 ms before, 763 ms after 🎉 * `IsCompactOpenCovered.of_isCompact_of_forall_exists_isCompactOpenCovered`: 2279 ms before, 2009 ms after 🎉 * `UniformContinuousOn.comp_tendstoUniformly_eventually`: 416 ms before, 151 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/) 27/27 Mathlib/Algebra/Group/Irreducible/Indecomposable.lean,Mathlib/Combinatorics/SimpleGraph/Connectivity/Connected.lean,Mathlib/Combinatorics/SimpleGraph/Matching.lean,Mathlib/Combinatorics/SimpleGraph/Operations.lean,Mathlib/Combinatorics/SimpleGraph/Tutte.lean,Mathlib/LinearAlgebra/RootSystem/Base.lean,Mathlib/LinearAlgebra/RootSystem/Finite/G2.lean,Mathlib/LinearAlgebra/RootSystem/GeckConstruction/Lemmas.lean,Mathlib/Topology/Compactness/Compact.lean,Mathlib/Topology/Sets/CompactOpenCovered.lean,Mathlib/Topology/UniformSpace/UniformConvergenceTopology.lean 11 4 ['euprunin', 'github-actions', 'leanprover-radar', 'vihdzp'] joelriou
assignee:joelriou
 1
1-60087
1 day ago
15-22711
15 days ago
15-22666
15 days
35072 vasnesterov
author:vasnesterov
 feat(Tactic/ComputeAsymptotics/Multiseries): non-primitive corecursion for `Seq`: `FriendlyOperation` API This is a continuation of #34311. This PR adds more API about friendly operations: * `FriendlyOperation.destruct`: a "coinductive destructor" for `FriendlyOperation` * `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. --- 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 297/2 Mathlib/Tactic/ComputeAsymptotics/Multiseries/Corecursion.lean 1 33 ['Vierkantor', 'github-actions', 'joneugster', 'vasnesterov'] joneugster
assignee:joneugster
 1
1-59332
1 day ago
7-49298
7 days ago
21-50531
21 days
35323 martinwintermath
author:martinwintermath
 feat(Geometry/Convex/Cone): Add lemmas for PointedCone.dual Add several useful lemmas for `PointedCone.dual` in preparation for duality theory for FG cones. Some other changes are: * renamed `dual_le_dual` to `dual_anti` and added partner lemma `dual_antitone` * removed TODO comment since the stated lemma is not sufficient to prove the claim, an also this has now been proven and will become a PR in the near future. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-convex-geometry maintainer-merge 37/6 Mathlib/Geometry/Convex/Cone/Dual.lean 1 23 ['YaelDillies', 'github-actions', 'martinwintermath'] YaelDillies
assignee:YaelDillies
 1
1-47269
1 day ago
11-80803
11 days ago
17-60628
17 days
36611 AntoineChambert-Loir
author:AntoineChambert-Loir
 feat(Data/Nat/Choose/Multinomial): rename Multiset.multinomial Rename `Multiset.multinomial` to `Multiset.countPerms`. See Zulip thread : [#mathlib4 > Multinomial coefficients](https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/Multinomial.20coefficients/with/576343071) This will be used in #35830 to allow another, more natural, definition of `Multiset.multinomial`. Co-authored with: @mariainesdff --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) 24/22 Mathlib/Analysis/Calculus/ContDiff/Bounds.lean,Mathlib/Data/Nat/Choose/Multinomial.lean 2 14 ['AntoineChambert-Loir', 'SnirBroshi', 'github-actions', 'vihdzp'] nobody 1
1-44812
1 day ago
1-44877
1 day ago
3-42156
3 days
36609 JovanGerb
author:JovanGerb
 chore(Order/Hom/Lattice): clean up `to_dual` use This PR cleans up the use of `to_dual` for `LatticeHom` after #36159, avoiding `to_dual existing` where this is not needed. Another benefit of this PR is that `LatticeHom.toInfHom` now becomes reducible, just like `LatticeHom.toSupHom`, as a result of generating it with `extends`. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-order 13/41 Mathlib/Order/Hom/Basic.lean,Mathlib/Order/Hom/Lattice.lean 2 2 ['github-actions', 'vihdzp'] nobody 1
1-44361
1 day ago
3-36151
3 days ago
3-41543
3 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 67/58 Mathlib/SetTheory/Ordinal/CantorNormalForm.lean 1 15 ['SnirBroshi', 'github-actions', 'vihdzp'] nobody 1
1-29918
1 day ago
2-8371
2 days ago
10-71349
10 days
36584 vihdzp
author:vihdzp
 feat: lemmas on ordinal `Nat.cast` Downstreamed from the CGT repo. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-set-theory 30/11 Mathlib/SetTheory/Cardinal/Ordinal.lean,Mathlib/SetTheory/Ordinal/Arithmetic.lean,Mathlib/SetTheory/Ordinal/Basic.lean 3 5 ['SnirBroshi', 'b-mehta', 'github-actions', 'mathlib-merge-conflicts', 'vihdzp'] b-mehta
assignee:b-mehta
 1
1-28443
1 day ago
1-28506
1 day ago
3-81583
3 days
34729 vihdzp
author:vihdzp
 chore: `no_expose` various `Ordinal` definitions These all have convoluted definitions that are better characterized by their API, or (in the case of `Ordinal.ToType`) are defined through choice and have no useful definitional equalities. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-set-theory 14/9 Mathlib/SetTheory/Ordinal/Basic.lean,Mathlib/SetTheory/Ordinal/Exponential.lean 2 9 ['b-mehta', 'github-actions', 'leanprover-radar', 'vihdzp'] b-mehta
assignee:b-mehta
 1
1-28256
1 day ago
1-28256
1 day ago
42-20759
42 days
34554 SnirBroshi
author:SnirBroshi
 feat(Data/Nat/Factorization/Divisors): calculate divisors using prime factorization --- There are over 200 files that import both `divisors` and `factorization`, but none of them seemed to fit, so I created a new file for this. (`Data.Nat.Factorization.PrimePow` and `NumberTheory.ArithmeticFunction.Misc` are the best I found) [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-data maintainer-merge 91/0 Mathlib.lean,Mathlib/Data/Nat/Factorization/Divisors.lean 2 24 ['SnirBroshi', 'YaelDillies', 'b-mehta', 'eric-wieser', 'github-actions', 'jcommelin', 'joneugster', 'mathlib-bors', 'plp127'] joneugster
assignee:joneugster
 1
1-27708
1 day ago
19-75351
19 days ago
20-36417
20 days
34599 cameronfreer
author:cameronfreer
 feat(Logic/Equiv/Fintype): generalize toCompl and exists_extending_pair to finite source Generalize the Equiv subtype-extension API so it only needs finiteness of the source subtype, then use that to drastically simplify `Equiv.Perm.isMultiplyPretransitive`. ### Changes to `Logic/Equiv/Fintype.lean` * **`Equiv.toCompl`**: generalize from `[Finite α]` to `[Finite {x | p x}]`. New proof (due to tb65536) uses finset symmetric differences to avoid needing finiteness of the ambient type. * **`Equiv.extendSubtype`** and related lemmas: adapt to `[Finite {x | p x}]`. * **`Equiv.Perm.exists_extending_pair`**: strengthen from `[Finite β]` to `[Finite α]`. Given two injective functions `f, g : α → β` where `α` is finite, there exists `σ : Perm β` with `σ ∘ f = g`. The target `β` can now be infinite. ### Changes to `MultipleTransitivity.lean` * **`Equiv.Perm.isMultiplyPretransitive`**: replace ~70-line manual bijectivity construction with a two-line proof via `exists_smul_eq_embedding`. * **`exists_smul_eq_embedding`**: rewire to use `exists_extending_pair` directly (removing the old cardinal-arithmetic proof `exists_extending_pair_of_finite_source`). ### Application Used in formalizing de Finetti's theorem (exchangeability ⇒ contractability): https://github.com/cameronfreer/exchangeability/blob/03a854a2/Exchangeability/Contractability.lean#L459 Co-authored-by: tb65536 t-group-theory new-contributor 51/79 Mathlib/GroupTheory/GroupAction/MultipleTransitivity.lean,Mathlib/Logic/Equiv/Fintype.lean 2 26 ['LLaurance', 'cameronfreer', 'github-actions', 'mathlib-merge-conflicts', 'tb65536'] mattrobball
assignee:mattrobball
 1
1-9973
1 day ago
9-37164
9 days ago
30-58093
30 days
36664 SnirBroshi
author:SnirBroshi
 feat(SetTheory/Ordinal/Arithmetic): characterize when ordinal addition commutes --- The proof is from ["Cardinal and Ordinal Numbers"](https://en.wikipedia.org/wiki/Cardinal_and_Ordinal_Numbers). A similar fact for multiplication is mentioned on [Wikipedia](https://en.wikipedia.org/wiki/Ordinal_arithmetic). [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-set-theory 19/0 Mathlib/SetTheory/Ordinal/Arithmetic.lean 1 20 ['SnirBroshi', 'github-actions', 'mathlib-merge-conflicts', 'plp127', 'vihdzp'] vihdzp
assignee:vihdzp
 1
1-7442
1 day ago
1-12167
1 day ago
1-67237
1 day
35716 IvanRenison
author:IvanRenison
 feat(Combinatorics/SimpleGraph/Connectivity): add lemmas about reachable, degree and neighbor set --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-combinatorics awaiting-author 28/6 Mathlib/Combinatorics/SimpleGraph/Connectivity/Connected.lean 1 11 ['IvanRenison', 'SnirBroshi', 'YaelDillies', 'github-actions', 'vlad902'] YaelDillies
assignee:YaelDillies
 1
0-82411
22 hours ago
20-58657
20 days ago
20-58612
20 days
36713 SnirBroshi
author:SnirBroshi
 chore(Algebra/Group/End): golf `MulAut.conj` --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra easy delegated
label:t-algebra$
 7/10 Mathlib/Algebra/Group/End.lean 1 3 ['github-actions', 'grunweg', 'mathlib-bors', 'vihdzp'] grunweg
assignee:grunweg
 1
0-73961
20 hours ago
1-6291
1 day ago
1-6246
1 day
36720 YanYablonovskiy
author:YanYablonovskiy
 feat(Order): `OrderType.lift` and more order type API Adding the universe lifting operation to `OrderType` , addresses a 'TODO' . --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-order new-contributor maintainer-merge 36/2 Mathlib/Order/Types/Defs.lean 1 17 ['YaelDillies', 'YanYablonovskiy', 'github-actions'] nobody 1
0-68957
19 hours ago
0-69021
19 hours ago
0-70150
19 hours
36671 Komyyy
author:Komyyy
 doc(Order/ConditionallyCompleteLattice/Defs): Lean3 structure notation * Some docstrings still use Lean3 structure notation. * Some mistakenly use `(sup|inf)` instead of `s(Sup|Inf)` * `conditionallyCompleteLatticeOfs(Sup|Inf)` provides both `sup` & `inf` These were found while reviewing #35774. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) documentation t-order delegated 18/18 Mathlib/Order/ConditionallyCompleteLattice/Defs.lean 1 5 ['Komyyy', 'Vierkantor', 'github-actions', 'mathlib-bors'] Vierkantor
assignee:Vierkantor
 1
0-55208
15 hours ago
0-70806
19 hours ago
1-12340
1 day
35113 bryangingechen
author:bryangingechen
 ci: refactor commit_verification so it works on PRs from forks Currently the commit verification workflow fails when run on a PR from a fork because it tries to post a comment, but its GITHUB_TOKEN is read-only. [Example failure](https://github.com/leanprover-community/mathlib4/actions/runs/21796757425/job/62885536927?pr=34973) This PR refactors the commit verification workflow using the new [leanprover-community/privilege-escalation-bridge](https://github.com/leanprover-community/privilege-escalation-bridge), splitting it into two workflows where the second one (triggered by `workflow_run` has access to a GITHUB_TOKEN that can post comments). We also make the workflow run the commit verification scripts from `master` rather than the PR branch to close a small security issue where someone could spoof verification / get the workflow to post arbitrary comments by modifying the scripts in their branch. Prepared with codex. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) CI delegated LLM-generated 81/22 .github/workflows/commit_verification.yml,.github/workflows/commit_verification_wf_run.yml 2 35 ['adomani', 'bryangingechen', 'github-actions', 'joneugster', 'marcelolynch', 'mathlib-bors', 'mathlib-merge-conflicts'] joneugster
assignee:joneugster
 2
0-54516
15 hours ago
26-48551
26 days ago
7-46277
7 days
36443 Fieldnote-Echo
author:Fieldnote-Echo
 feat(Combinatorics/SimpleGraph): add SimpleGraph.ball (open metric ball) Add `SimpleGraph.ball`, the open ball in the graph extended metric. ## Design decisions - **Open ball** (strict `<`, not `≤`): `ball c ⊤` coincides with the connected component of `c`, whereas a closed ball would give `closedBall c ⊤ = univ`. - **Named `SimpleGraph.ball`** (not `eball`): since `dist`-valued balls are less natural for disconnected graphs, the `e` prefix is unnecessary. - **Graph-specific** (not via `PseudoEMetricSpace`): avoids importing `ℝ`. AI assistance: Claude (Opus 4.6) helped draft and iterate on the implementation. I reviewed the code line by line and vouch for the final contents. Discussed on [Zulip](https://leanprover.zulipchat.com/#narrow/channel/252551-graph-theory/topic/SimpleGraph.20metric.20balls/with/577846803). --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-combinatorics new-contributor LLM-generated 59/3 Mathlib/Combinatorics/SimpleGraph/Metric.lean 1 36 ['Fieldnote-Echo', 'Rida-Hamadani', 'SnirBroshi', 'github-actions', 'lauramonk', 'vlad902'] nobody 1
0-54290
15 hours ago
6-52802
6 days ago
6-52757
6 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 merge-conflict LLM-generated 51/3 Mathlib/CategoryTheory/Galois/EssSurj.lean,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'] joneugster
assignee:joneugster
 1
0-54110
15 hours ago
28-11578
28 days ago
37-27992
37 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 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 10 ['JovanGerb', 'github-actions', 'kim-em', 'mathlib-dependent-issues', 'mathlib-merge-conflicts', 'vihdzp'] alexjbest
assignee:alexjbest
 1
0-54100
15 hours ago
13-21715
13 days ago
20-66694
20 days
35233 kim-em
author:kim-em
 chore: lake shake --add-public --keep-implied --keep-prefix --fix This PR runs `lake shake --add-public --keep-implied --keep-prefix --fix` again after https://github.com/leanprover-community/mathlib4/pull/34511, picking up the remaining 28 files that now have suggestions. 🤖 Prepared with Claude Code large-import maintainer-merge awaiting-author LLM-generated 13/12 Mathlib/Algebra/Category/ModuleCat/Sheaf/Quasicoherent.lean,Mathlib/Analysis/Distribution/SchwartzSpace/Basic.lean,Mathlib/Data/Nat/Init.lean,Mathlib/LinearAlgebra/Matrix/Kronecker.lean,Mathlib/LinearAlgebra/TensorProduct/Basic.lean,Mathlib/LinearAlgebra/TensorProduct/Defs.lean,Mathlib/LinearAlgebra/TensorProduct/Map.lean,Mathlib/Logic/Basic.lean,Mathlib/Logic/Relation.lean,Mathlib/RingTheory/MatrixAlgebra.lean,Mathlib/Tactic/Hint.lean,Mathlib/Tactic/Linter/FindDeprecations.lean,Mathlib/Tactic/Nontriviality/Core.lean,Mathlib/Tactic/NormNum/Result.lean,Mathlib/Tactic/Order/CollectFacts.lean,Mathlib/Tactic/Tauto.lean 16 16 ['TwoFX', 'Vierkantor', 'adomani', 'bryangingechen', 'github-actions', 'joneugster', 'kim-em', 'mathlib-merge-conflicts', 'mathlib-splicebot'] nobody 1
0-54096
15 hours ago
12-84855
12 days ago
24-63259
24 days
35518 kim-em
author:kim-em
 chore: forbid prime (') in filenames, rename LinearCombination' This PR renames `Mathlib/Tactic/LinearCombination'.lean` to `LinearCombinationPrime.lean` (and the corresponding test file), and adds a lint check to `modulesOSForbidden` to prevent future files with prime/apostrophe characters in their names. The `'` character in filenames causes shell escaping issues in scripts (any `find ... -name '*.lean'` or similar pattern needs careful quoting to handle these files correctly). 🤖 Prepared with Claude Code file-removed t-meta merge-conflict LLM-generated 13/8 Mathlib.lean,Mathlib/Tactic.lean,Mathlib/Tactic/LinearCombinationPrime.lean,Mathlib/Tactic/Linter/TextBased.lean,Mathlib/Tactic/Linter/UnusedTactic.lean,MathlibTest/linear_combination_prime.lean 6 7 ['eric-wieser', 'euprunin', 'github-actions', 'kim-em', 'mathlib-merge-conflicts'] adamtopaz
assignee:adamtopaz
 1
0-54095
15 hours ago
23-75208
23 days ago
23-78349
23 days
35826 quangvdao
author:quangvdao
 feat(Probability/ProbabilityMassFunction): total variation distance and MetricSpace instance Define total variation distance on probability mass functions, provide a `MetricSpace` instance, and prove the data processing inequality. The extended TV distance `PMF.etvDist` is defined in `ℝ≥0∞` as `(1/2) ∑ x, absDiff (p x) (q x)`, using a new symmetric absolute difference `ENNReal.absDiff`. The real-valued `PMF.tvDist` is its `toReal`. New definitions: - `ENNReal.absDiff`: symmetric absolute difference `(a - b) + (b - a)` - `PMF.etvDist`: extended total variation distance - `PMF.tvDist`: real-valued total variation distance - `PMF.instMetricSpace`: `MetricSpace` instance on `PMF α` Main results: - `ENNReal.absDiff_triangle`: triangle inequality for `absDiff` - `ENNReal.absDiff_tsum_le`: subadditivity over infinite sums - `PMF.etvDist_le_one`: TV distance is at most 1 - `PMF.etvDist_map_le`: data processing inequality (deterministic maps) - `PMF.etvDist_bind_right_le`: data processing inequality (Markov kernels) - `PMF.etvDist_option_punit`: closed form for binary distributions Supersedes #33680 with a complete, sorry-free implementation. See Zulip discussion: This PR was authored with the support of Claude (Cursor IDE). --- This PR provides a complete formalization of total variation distance for PMFs, including: 1. **`ENNReal.absDiff`** (`Mathlib/Data/ENNReal/AbsDiff.lean`): A symmetric absolute difference for `ℝ≥0∞` with triangle inequality, connection to real absolute value, and algebraic properties. The tsum-related lemmas (`absDiff_tsum_le`, `tsum_fiber`) are placed in the TV distance file to avoid pulling topology imports into `Data.ENNReal`. 2. **`PMF.etvDist` / `PMF.tvDist`** (`Mathlib/Probability/ProbabilityMassFunction/TotalVariation.lean`): Total variation distance with a `MetricSpace` instance, data processing inequality for both deterministic maps and Markov kernels, and a closed form for binary distributions. Compared to #33680, this PR: - Has no `sorry`s - Defines the distance in `ℝ≥0∞` first (following Mathlib convention for `edist`/`dist`) - Includes the data processing inequality - Has full documentation and passes all Mathlib linters Made with [Cursor](https://cursor.com) t-measure-probability LLM-generated 459/0 Mathlib.lean,Mathlib/Data/ENNReal/AbsDiff.lean,Mathlib/Probability/ProbabilityMassFunction/TotalVariation.lean 3 6 ['BoltonBailey', 'EtienneC30', 'github-actions', 'joneugster', 'quangvdao'] RemyDegenne
assignee:RemyDegenne
 1
0-54064
15 hours ago
10-31988
10 days ago
10-32724
10 days
36734 JovanGerb
author:JovanGerb
 fix(SetTheory/ZFC/Basic): fix diamond for `Membership ZFSet ZFSet` This PR removes the manual instance of `Membership ZFSet ZFSet` in favour of the instance that comes from the `SetLike` instance. The two instances are not defeq in `implicit_reducible` transparency, hence causing a diamond (it relies on the defeq of `{x | x ∈ s}` with `s`). --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-set-theory 15/17 Mathlib/SetTheory/ZFC/Basic.lean 1 1 ['github-actions', 'vihdzp'] nobody 1
0-42891
11 hours ago
0-49999
13 hours ago
0-50451
14 hours
36101 wwylele
author:wwylele
 feat(RingTheory): lemmas about power of maximal ideal This adds `IsMaximal.mul_mem_pow` that generalizes `Ideal.IsPrime.mul_mem_pow ` from (IsPrime + IsDedekindDomain) to IsMaximal (Except for the trivial bot case, which is why the prime version is kept) Also added a related `Quotient.isUnit_mk_pow_iff_notMem` for determining units in a quotient by power Disclosure of AI usage: this was produced when I chat with LLM for certain exercise problems, and I identified these small lemmas that can be implemented. Also asked LLM for some hints for idea. Code entirely written by me --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-ring-theory maintainer-merge 52/6 Mathlib/RingTheory/DedekindDomain/Ideal/Lemmas.lean,Mathlib/RingTheory/Ideal/Operations.lean,Mathlib/RingTheory/Ideal/Quotient/Nilpotent.lean 3 9 ['chrisflav', 'copilot-pull-request-reviewer', 'github-actions', 'wwylele'] chrisflav
assignee:chrisflav
 1
0-41172
11 hours ago
2-33889
2 days ago
12-77040
12 days
35539 xgenereux
author:xgenereux
 feat(DedekindDomain/Factorization): add `iInf` version of `finprod_heightOneSpectrum_factorization` This PR adds an `iInf` version of `finprod_heightOneSpectrum_factorization`. This requires two lemmas: - `prod_eq_iInf_of_coprime` - An `iInf` version of `mul_eq_inf_of_coprime`. - `HeightOneSpectrum.pow_sup_pow_eq_top` - Bundled up version of `Ideal.IsMaximal.coprime_of_ne` + `Ideal.pow_sup_pow_eq_top` for `HeightOneSpectrum`. ------ I noticed that these lemmas simplify a bit the work on the Chinese remainder theorem done in the file. The last commit of this PR is this simplification. I can remove it if this is not relevant. 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 delegated 90/48 Mathlib/Algebra/Module/DedekindDomain.lean,Mathlib/RingTheory/DedekindDomain/Factorization.lean,Mathlib/RingTheory/DedekindDomain/Ideal/Lemmas.lean,Mathlib/RingTheory/Ideal/Operations.lean,Mathlib/RingTheory/Ideal/Quotient/Operations.lean 5 32 ['Ruben-VandeVelde', 'chrisflav', 'erdOne', 'github-actions', 'mathlib-bors', 'riccardobrasca', 'xgenereux'] chrisflav
assignee:chrisflav
 1
0-33238
9 hours ago
2-61441
2 days ago
21-12805
21 days
35878 Parcly-Taxel
author:Parcly-Taxel
 chore: use `induction` for `Quotient.induction` invocations Found through the regex `(refine|apply|exact).*Quotient.induction`. Includes the multiple-argument variants. tech debt maintainer-merge 100/101 Mathlib/Algebra/GroupWithZero/Associated.lean,Mathlib/Algebra/Lie/Quotient.lean,Mathlib/Algebra/Module/ZLattice/Basic.lean,Mathlib/AlgebraicTopology/SimplexCategory/GeneratorsRelations/Basic.lean,Mathlib/CategoryTheory/Abelian/Pseudoelements.lean,Mathlib/CategoryTheory/Monoidal/Free/Basic.lean,Mathlib/CategoryTheory/Subobject/Basic.lean,Mathlib/Combinatorics/Tiling/Tile.lean,Mathlib/Computability/TuringMachine/Tape.lean,Mathlib/Data/Multiset/Functor.lean,Mathlib/Data/Multiset/Sym.lean,Mathlib/Data/Setoid/Basic.lean,Mathlib/FieldTheory/Fixed.lean,Mathlib/GroupTheory/Perm/Cycle/Concrete.lean,Mathlib/LinearAlgebra/Alternating/DomCoprod.lean,Mathlib/LinearAlgebra/Quotient/Pi.lean,Mathlib/Logic/Equiv/Basic.lean,Mathlib/NumberTheory/Padics/PadicNumbers.lean,Mathlib/NumberTheory/RamificationInertia/Basic.lean,Mathlib/Order/Category/PartOrd.lean,Mathlib/Order/RelIso/Basic.lean,Mathlib/RingTheory/AdicCompletion/Algebra.lean,Mathlib/RingTheory/AdicCompletion/Basic.lean,Mathlib/RingTheory/AdicCompletion/Functoriality.lean,Mathlib/RingTheory/Ideal/Norm/AbsNorm.lean,Mathlib/SetTheory/Cardinal/Cofinality.lean,Mathlib/SetTheory/Ordinal/Arithmetic.lean,Mathlib/Topology/Algebra/InfiniteSum/Module.lean 28 11 ['github-actions', 'joneugster', 'mathlib-merge-conflicts'] joneugster
assignee:joneugster
 1
0-23441
6 hours ago
1-12719
1 day ago
14-64849
14 days
35647 BryceT233
author:BryceT233
 feat(RingTheory/Ideal/Quotient): add a canonical inclusion map This is the second PR split from the larger PR https://github.com/leanprover-community/mathlib4/pull/34936 to make the review process easier. It introduces `Submodule.powSMulQuotInclusion`, which is the canonical inclusion from `I ^ a • N ⧸ I ^ b • (I ^ a • N)` to `M ⧸ I ^ c • N` where `c = b + a`, and provides auxiliary lemmas for it --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-ring-theory new-contributor 43/0 Mathlib/RingTheory/Ideal/Quotient/PowTransition.lean 1 16 ['BryceT233', 'chrisflav', 'erdOne', 'github-actions', 'wwylele'] chrisflav
assignee:chrisflav
 1
0-19695
5 hours ago
0-41270
11 hours ago
21-30377
21 days
33944 artie2000
author:artie2000
 feat(Algebra/Ring): formally real rings * Define formally real rings * Prove basic inductive facts about them Co-authored-by: Violeta Hernández Palacios --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra
label:t-algebra$
 158/0 Mathlib.lean,Mathlib/Algebra/Ring/IsFormallyReal.lean 2 31 ['artie2000', 'github-actions', 'mariainesdff', 'vihdzp'] mariainesdff
assignee:mariainesdff
 1
0-19497
5 hours ago
0-24816
6 hours ago
37-45260
37 days
33780 ooovi
author:ooovi
 feat(Geometry/Convex/Cone): lineality space of pointed cones Define the lineality space `PointedCone.lineal` as the submodule `C ⊓ -C`. Prove that it is the largest submodule of the cone, which is sometimes used as an alternative definition. Co-authored-by: Martin Winter --- dependency of #33664 - [x] depends on #33761 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-convex-geometry maintainer-merge 36/1 Mathlib/Geometry/Convex/Cone/Pointed.lean 1 24 ['YaelDillies', 'artie2000', 'eric-wieser', 'github-actions', 'martinwintermath', 'mathlib4-merge-conflict-bot', 'ooovi', 'vihdzp'] YaelDillies
assignee:YaelDillies
 1
0-18753
5 hours ago
3-37650
3 days ago
30-36320
30 days
35292 Rida-Hamadani
author:Rida-Hamadani
 feat(SimpleGraph): taking twice from a walk equals taking the minimum this is an analogue to `List.take_take`. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-combinatorics 5/0 Mathlib/Combinatorics/SimpleGraph/Walks/Operations.lean 1 2 ['SnirBroshi', 'github-actions', 'vlad902'] YaelDillies
assignee:YaelDillies
 2
0-18745
5 hours ago
30-69433
30 days ago
30-69388
30 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
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 9 ['Rob23oba', 'eric-wieser', 'github-actions', 'joneugster', 'loefflerd'] dagurtomas
assignee:dagurtomas
 1
0-18743
5 hours ago
27-73083
27 days ago
28-22330
28 days
36064 marcelolynch
author:marcelolynch
 ci: Push to the cache using OIDC and federated credentials This migration replaces static SAS-based cache upload auth with GitHub OIDC + Entra app registrations in Azure. Concretely, each workflow run gets a GitHub-issued OIDC token, and Azure AD (Entra) exchanges that token for a short-lived access token for Storage. We do this through app registrations configured with federated credentials, so no client secret or SAS needs to be stored for normal operation. A key design point is identity separation. We use two different app registrations (two app IDs): one for `master` workflows and one for non-master workflows. That lets us enforce different trust and permission boundaries in Azure RBAC, instead of giving one shared credential broad write access to every workflow type. Note that this separation is not implemented by this change: for now, both identities are still contributing to the same cache. On the cache client side (Cache/Requests.lean / Cache/Main.lean), auth selection is robust to empty bearer values, and there is migration-safe fallback behavior: if bearer upload fails with auth errors and SAS is available, it retries with SAS. The workflow also supports fallback to MATHLIB_CACHE_SAS when minting fails. Benefits: - OIDC/federated credentials remove dependency on a static shared upload secret. - Tokens are minted just-in-time and short-lived. - We can enforce least privilege cleanly by using separate app identities for different workflow classes. - Blast radius is reduced: master and non-master workflows can have different RBAC scopes. - We keep operational safety during migration by retaining controlled SAS fallback, but SAS is no longer the primary auth path. CI maintainer-merge 124/34 .github/workflows/bors.yml,.github/workflows/build.yml,.github/workflows/build_fork.yml,.github/workflows/build_template.yml,.github/workflows/ci_dev.yml,Cache/Main.lean,Cache/README.md,Cache/Requests.lean 8 9 ['bryangingechen', 'github-actions', 'joneugster', 'marcelolynch', 'mathlib-merge-conflicts'] jcommelin
assignee:jcommelin
 1
0-18741
5 hours ago
7-30647
7 days ago
8-68401
8 days
36414 alainchmt
author:alainchmt
 feat(FieldTheory/Finite): irreducible factors of X^q^n - X have degree dividing n Add the theorem that if an irreducible polynomial over a finite field `K` divides `X ^ (Fintype.card K) ^ n - X`, then the degree of the polynomial divides `n`. We also add an auxiliary lemma stating that polynomials of nonzero degree dividing `X ^ (Fintype.card K) - X` have a root in `K`. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra new-contributor
label:t-algebra$
 53/0 Mathlib/FieldTheory/Finite/Extension.lean,Mathlib/FieldTheory/Finite/GaloisField.lean,Mathlib/FieldTheory/IntermediateField/Adjoin/Basic.lean,Mathlib/FieldTheory/Minpoly/Field.lean 4 9 ['alainchmt', 'github-actions', 'tb65536'] dagurtomas
assignee:dagurtomas
 1
0-18736
5 hours ago
5-50036
5 days ago
7-24929
7 days
36425 yuma-mizuno
author:yuma-mizuno
 fix: prevent stack overflow in `monoidal` tactic Fix stack overflow when trying to use the tactic with incomplete expressions. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-category-theory t-meta 48/0 Mathlib/Tactic/CategoryTheory/Bicategory/Datatypes.lean,Mathlib/Tactic/CategoryTheory/Monoidal/Datatypes.lean,MathlibTest/CategoryTheory/Bicategory/Basic.lean,MathlibTest/CategoryTheory/Monoidal/Basic.lean 4 4 ['github-actions', 'robin-carlier', 'yuma-mizuno'] adamtopaz
assignee:adamtopaz
 1
0-18735
5 hours ago
3-64149
3 days ago
3-24795
3 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 --- - [x] depends on: #33249 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-combinatorics 110/1 Mathlib/Combinatorics/SimpleGraph/Connectivity/WalkDecomp.lean,Mathlib/Combinatorics/SimpleGraph/Paths.lean,Mathlib/Combinatorics/SimpleGraph/Walks/Operations.lean,Mathlib/Data/List/Basic.lean,Mathlib/Data/List/Nodup.lean 5 17 ['Rida-Hamadani', 'github-actions', 'mathlib-dependent-issues', 'mathlib4-merge-conflict-bot', 'vlad902'] nobody 1
0-18051
5 hours ago
0-18112
5 hours ago
11-75584
11 days
36717 kim-em
author:kim-em
 feat(Tactic/FastInstance): skip mkAuxTheorem for proof fields when types agree at instances transparency This PR improves how \`fast_instance%\` handles proof-valued constructor fields. Previously, proof fields were always wrapped in \`mkAuxTheorem\`, which creates a separate auxiliary theorem carrying the expected type. This is unnecessary when the proof's actual type already agrees with the expected type at instances transparency — in that case the proof can be assigned directly. The new behaviour: check whether the proof's type agrees with the expected type at instances transparency. If yes, assign directly. If no (indicating a binder type mismatch), wrap with \`mkAuxTheorem\` as before. This is a natural analogue of the data-field binder type checking that \`fast_instance%\` already performs, applied to proof fields. 🤖 Prepared with Claude Code t-meta LLM-generated delegated 9/4 Mathlib/Tactic/FastInstance.lean,MathlibTest/fast_instance.lean 2 4 ['eric-wieser', 'github-actions', 'mathlib-bors'] nobody 1
0-11348
3 hours ago
0-82847
23 hours ago
0-85890
23 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
593-79154
1 year ago
unknown
0-0
0 seconds
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
593-79154
1 year ago
unknown
0-0
0 seconds
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
593-79153
1 year ago
unknown
0-0
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
593-79153
1 year ago
unknown
0-0
0 seconds
14167 alreadydone
author:alreadydone
 feat: Group scheme structure on Weierstrass curve --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict WIP t-algebraic-geometry workshop-AIM-AG-2024 727/41 Mathlib.lean,Mathlib/Algebra/GroupWithZero/NonZeroDivisors.lean,Mathlib/Algebra/Polynomial/Bivariate.lean,Mathlib/AlgebraicGeometry/EllipticCurve/Group.lean,Mathlib/AlgebraicGeometry/EllipticCurve/Scheme.lean,Mathlib/AlgebraicGeometry/EllipticCurve/Universal.lean,Mathlib/Data/Finsupp/Basic.lean,Mathlib/GroupTheory/MonoidLocalization.lean,Mathlib/LinearAlgebra/Basis.lean,Mathlib/LinearAlgebra/FreeModule/Basic.lean,Mathlib/RingTheory/AlgebraTower.lean,Mathlib/RingTheory/MvPolynomial/Basic.lean 12 3 ['Multramate', 'github-actions', 'jcommelin'] nobody
593-79153
1 year ago
628-39508
628 days ago
0-12
12 seconds
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
593-79152
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
593-79152
1 year ago
657-79850
657 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
593-79152
1 year ago
unknown
0-0
0 seconds
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
593-79152
1 year ago
unknown
0-0
0 seconds
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
593-79151
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
593-79151
1 year ago
unknown
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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
593-79151
1 year ago
unknown
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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
593-79151
1 year ago
686-28189
686 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
593-79151
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
593-79151
1 year ago
667-39138
667 days ago
5-74504
5 days
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
593-79151
1 year ago
unknown
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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
593-79151
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
593-79151
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
593-79151
1 year ago
662-17179
662 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
593-79150
1 year ago
698-14846
698 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
593-79149
1 year ago
780-71273
780 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
593-79149
1 year ago
760-47199
760 days ago
1-29105
1 day
10594 lecopivo
author:lecopivo
 feat: `fun_trans` function transformation tactic e.g. for computing derivatives feat: `fun_trans` function transformation tactic e.g. for computing derivatives Function transformation tactic/simproc. For example it can be used for computing derivatives. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict WIP t-meta 1819/56 Mathlib.lean,Mathlib/Tactic.lean,Mathlib/Tactic/FunProp/Core.lean,Mathlib/Tactic/FunProp/Decl.lean,Mathlib/Tactic/FunProp/Elab.lean,Mathlib/Tactic/FunProp/FunctionData.lean,Mathlib/Tactic/FunProp/MorExt.lean,Mathlib/Tactic/FunProp/Theorems.lean,Mathlib/Tactic/FunTrans/Attr.lean,Mathlib/Tactic/FunTrans/Core.lean,Mathlib/Tactic/FunTrans/Decl.lean,Mathlib/Tactic/FunTrans/Elab.lean,Mathlib/Tactic/FunTrans/Theorems.lean,Mathlib/Tactic/FunTrans/Types.lean,test/fun_prop2.lean,test/fun_prop_dev.lean,test/fun_trans_dev.lean 17 11 ['github-actions'] nobody
593-79149
1 year ago
unknown
0-0
0 seconds
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
593-79149
1 year ago
643-57551
643 days ago
64-12984
64 days
10842 mcdoll
author:mcdoll
 chore: simplify proofs using new positivity extensions and tests --- - [x] depends on: #10661 - [ ] depends on: #10796 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict WIP blocked-by-other-PR 98/50 Mathlib/Analysis/Convolution.lean,Mathlib/Analysis/SpecialFunctions/Gaussian.lean,Mathlib/MeasureTheory/Covering/Differentiation.lean,Mathlib/MeasureTheory/Function/ConditionalExpectation/CondexpL1.lean,Mathlib/MeasureTheory/Function/ConditionalExpectation/Real.lean,Mathlib/MeasureTheory/Function/ConditionalExpectation/Unique.lean,Mathlib/MeasureTheory/Function/ContinuousMapDense.lean,Mathlib/MeasureTheory/Integral/Bochner.lean,Mathlib/MeasureTheory/Measure/Tilted.lean,Mathlib/Probability/Martingale/Upcrossing.lean,Mathlib/Probability/Moments.lean,Mathlib/Probability/Variance.lean,Mathlib/Tactic/Positivity/Core.lean,test/positivity.lean 14 1 ['leanprover-community-mathlib4-bot'] nobody
593-79149
1 year ago
unknown
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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
593-79149
1 year ago
unknown
0-0
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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
593-79149
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
593-79148
1 year ago
810-51472
810 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
593-79148
1 year ago
833-44511
833 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
593-79148
1 year ago
unknown
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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
593-79148
1 year ago
841-26690
841 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
593-79148
1 year ago
810-44795
810 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
593-79148
1 year ago
833-69044
833 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
593-79148
1 year ago
829-52242
829 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
593-79148
1 year ago
827-24578
827 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
593-79148
1 year ago
800-37239
800 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
593-79148
1 year ago
unknown
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9252 astrainfinita
author:astrainfinita
 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
593-79148
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
593-79148
1 year ago
784-23374
784 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
593-79148
1 year ago
788-28746
788 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
593-79148
1 year ago
788-33994
788 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
593-79148
1 year ago
unknown
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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
593-79148
1 year ago
unknown
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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
593-79148
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
593-79148
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
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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
unknown
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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
593-79147
1 year ago
879-41911
879 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
unknown
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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 36 ['adomani', 'alreadydone', 'digama0', 'eric-wieser', 'ericrbg', 'jcommelin', 'leanprover-bot', 'sgouezel'] nobody
593-79147
1 year ago
868-44644
868 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
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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
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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
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1 year ago
unknown
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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
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unknown
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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
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1 year ago
unknown
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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
593-79147
1 year ago
872-47975
872 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
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1 year ago
unknown
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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
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1 year ago
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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
593-79147
1 year ago
891-66379
891 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
593-79147
1 year ago
826-62750
826 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
593-79147
1 year ago
888-27455
888 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
593-79147
1 year ago
881-73285
881 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
593-79147
1 year ago
740-2578
740 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
593-79147
1 year ago
648-9255
648 days ago
1-47913
1 day
7909 mcdoll
author:mcdoll
 fix(Tactic/Continuity): remove npowRec and add new tag for Continuous.pow --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict WIP t-topology t-meta 14/9 Mathlib/Tactic/Continuity.lean,Mathlib/Topology/Category/TopCat/Limits/Basic.lean,test/Continuity.lean 3 2 ['eric-wieser'] nobody
593-79147
1 year ago
873-18047
873 days ago
0-72515
20 hours
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
593-79147
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
593-79147
1 year ago
unknown
0-0
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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
593-79147
1 year ago
849-12881
849 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
593-79146
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
593-79146
1 year ago
unknown
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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
593-79146
1 year ago
unknown
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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
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1 year ago
unknown
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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
593-79146
1 year ago
1006-65198
1006 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
593-79146
1 year ago
1004-80272
1004 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
593-79146
1 year ago
unknown
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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
593-79146
1 year ago
961-79508
961 days ago
9-71263
9 days
6079 eric-wieser
author:eric-wieser
 fix: deduplicate variables `variables {A} [Ring A]` meant "update the binder of `A`" in Lean 3, but now means "create a duplicate variable called `A`" (or at least, does so when inspecting the state within the variables line). This removes a number of porting notes that were stumbling over this behavior. [Related Zulip thread](https://leanprover.zulipchat.com/#narrow/stream/270676-lean4/topic/unexpected.20.60variable.60.20behaviour.3F/near/360154080) --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict awaiting-CI 1012/443 Archive/Wiedijk100Theorems/CubingACube.lean,Mathlib/Algebra/Category/ModuleCat/Adjunctions.lean,Mathlib/Algebra/CharP/Basic.lean,Mathlib/Algebra/CovariantAndContravariant.lean,Mathlib/Algebra/DirectLimit.lean,Mathlib/Algebra/DirectSum/Finsupp.lean,Mathlib/Algebra/DirectSum/Module.lean,Mathlib/Algebra/GradedMonoid.lean,Mathlib/Algebra/Group/Pi.lean,Mathlib/Algebra/GroupPower/Basic.lean,Mathlib/Algebra/GroupPower/Lemmas.lean,Mathlib/Algebra/Hom/Aut.lean,Mathlib/Algebra/Hom/Equiv/Basic.lean,Mathlib/Algebra/Hom/Group.lean,Mathlib/Algebra/Homology/HomologicalComplex.lean,Mathlib/Algebra/Homology/HomotopyCategory.lean,Mathlib/Algebra/Homology/ImageToKernel.lean,Mathlib/Algebra/Homology/ShortComplex/LeftHomology.lean,Mathlib/Algebra/IndicatorFunction.lean,Mathlib/Algebra/Jordan/Basic.lean,Mathlib/Algebra/Lie/Classical.lean,Mathlib/Algebra/Lie/Subalgebra.lean,Mathlib/Algebra/Lie/Submodule.lean,Mathlib/Algebra/Lie/TensorProduct.lean,Mathlib/Algebra/Module/Injective.lean,Mathlib/Algebra/Module/LinearMap.lean,Mathlib/Algebra/Module/Submodule/Basic.lean,Mathlib/Algebra/MonoidAlgebra/Basic.lean,Mathlib/Algebra/MonoidAlgebra/Grading.lean,Mathlib/Algebra/Order/CompleteField.lean,Mathlib/Algebra/Order/Pi.lean,Mathlib/Algebra/Order/Ring/Lemmas.lean,Mathlib/Algebra/Ring/Equiv.lean,Mathlib/Algebra/SMulWithZero.lean,Mathlib/Algebra/Star/Module.lean,Mathlib/Algebra/Support.lean,Mathlib/AlgebraicGeometry/EllipticCurve/Point.lean,Mathlib/AlgebraicGeometry/Morphisms/RingHomProperties.lean,Mathlib/AlgebraicGeometry/ProjectiveSpectrum/Scheme.lean,Mathlib/AlgebraicGeometry/StructureSheaf.lean,Mathlib/AlgebraicTopology/DoldKan/Decomposition.lean,Mathlib/AlgebraicTopology/MooreComplex.lean,Mathlib/Analysis/Calculus/ContDiff.lean,Mathlib/Analysis/Calculus/FormalMultilinearSeries.lean,Mathlib/Analysis/Calculus/LocalExtr.lean,Mathlib/Analysis/Calculus/TangentCone.lean,Mathlib/Analysis/Convex/Basic.lean,Mathlib/Analysis/Convex/Combination.lean,Mathlib/Analysis/Convex/Extreme.lean,Mathlib/Analysis/Convex/Function.lean,Mathlib/Analysis/Convex/Hull.lean,Mathlib/Analysis/Convex/Independent.lean,Mathlib/Analysis/Convex/Intrinsic.lean,Mathlib/Analysis/Convex/Join.lean,Mathlib/Analysis/Convex/Quasiconvex.lean,Mathlib/Analysis/Convex/Segment.lean,Mathlib/Analysis/Convex/Star.lean,Mathlib/Analysis/Convex/Uniform.lean,Mathlib/Analysis/Convolution.lean,Mathlib/Analysis/Fourier/RiemannLebesgueLemma.lean,Mathlib/Analysis/InnerProductSpace/Calculus.lean,Mathlib/Analysis/LocallyConvex/AbsConvex.lean,Mathlib/Analysis/LocallyConvex/BalancedCoreHull.lean,Mathlib/Analysis/LocallyConvex/Basic.lean,Mathlib/Analysis/LocallyConvex/Bounded.lean,Mathlib/Analysis/LocallyConvex/WithSeminorms.lean,Mathlib/Analysis/Normed/Field/Basic.lean,Mathlib/Analysis/Normed/Group/AddCircle.lean,Mathlib/Analysis/Normed/Group/Hom.lean,Mathlib/Analysis/Normed/Group/Seminorm.lean,Mathlib/Analysis/NormedSpace/Completion.lean,Mathlib/Analysis/NormedSpace/LinearIsometry.lean,Mathlib/Analysis/NormedSpace/Multilinear.lean,Mathlib/Analysis/NormedSpace/OperatorNorm.lean,Mathlib/Analysis/ODE/PicardLindelof.lean,Mathlib/Analysis/Seminorm.lean,Mathlib/CategoryTheory/Action.lean,Mathlib/CategoryTheory/Bicategory/LocallyDiscrete.lean,Mathlib/CategoryTheory/Bicategory/NaturalTransformation.lean,Mathlib/CategoryTheory/Closed/Ideal.lean,Mathlib/CategoryTheory/ConcreteCategory/UnbundledHom.lean,Mathlib/CategoryTheory/Core.lean,Mathlib/CategoryTheory/Endofunctor/Algebra.lean,Mathlib/CategoryTheory/Enriched/Basic.lean,Mathlib/CategoryTheory/EssentialImage.lean,Mathlib/CategoryTheory/FullSubcategory.lean,Mathlib/CategoryTheory/Functor/Category.lean,Mathlib/CategoryTheory/Limits/Fubini.lean,Mathlib/CategoryTheory/Limits/HasLimits.lean,Mathlib/CategoryTheory/Limits/Preserves/Shapes/Kernels.lean,Mathlib/CategoryTheory/Limits/Shapes/BinaryProducts.lean,Mathlib/CategoryTheory/Limits/Shapes/Biproducts.lean,Mathlib/CategoryTheory/Limits/Shapes/Equalizers.lean,Mathlib/CategoryTheory/Limits/Shapes/Images.lean,Mathlib/CategoryTheory/Limits/Shapes/WidePullbacks.lean,Mathlib/CategoryTheory/Linear/LinearFunctor.lean,Mathlib/CategoryTheory/Localization/Construction.lean,Mathlib/CategoryTheory/Monoidal/Braided.lean,Mathlib/CategoryTheory/Monoidal/CommMon_.lean,Mathlib/CategoryTheory/Monoidal/Discrete.lean 302 1 ['timotree3'] nobody
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1 year ago
unknown
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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
593-79146
1 year ago
unknown
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6210 MohanadAhmed
author:MohanadAhmed
 feat(Data/IsROrC/Basic): add a `StarOrderedRing` instance This PR implements a suggestion by @urkud on [Zulip thread](https://leanprover.zulipchat.com/#narrow/stream/113488-general/topic/PartialOrder.20and.20StarOrderedRing.20on.20IsROrC) on how to get a `StarOrderedRing` on the `IsROrC` class. In that discussion the suggested step were: 1. Add PartialOrder K to the list of extends and add le_iff_re_im : z ≤ w ↔ re z ≤ re w ∧ im z = im w to the list of axioms. 2. Prove StarOrderedRing instance for any IsROrC. 3. Add (almost trivial) le_iff_re_im proofs to IsROrC instances for real and complex numbers. This PR does exactly these three steps --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict WIP t-algebra t-analysis
label:t-algebra$
 25/24 Mathlib/Analysis/Complex/Basic.lean,Mathlib/Analysis/SpecialFunctions/Pow/Deriv.lean,Mathlib/Data/Complex/Basic.lean,Mathlib/Data/IsROrC/Basic.lean 4 19 ['MohanadAhmed', 'eric-wieser', 'j-loreaux'] nobody
593-79146
1 year ago
950-39254
950 days ago
12-17588
12 days
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
593-79146
1 year ago
732-45420
732 days ago
60-84345
60 days
6328 astrainfinita
author:astrainfinita
 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
593-79146
1 year ago
unknown
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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
593-79146
1 year ago
unknown
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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
593-79146
1 year ago
838-31888
838 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
593-79146
1 year ago
865-65146
865 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
593-79146
1 year ago
748-76455
748 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
593-79145
1 year ago
933-16881
933 days ago
45-49128
45 days
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
589-55455
1 year ago
693-7097
693 days ago
0-17
17 seconds
13852 astrainfinita
author:astrainfinita
 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
589-49135
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
586-67124
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
581-36300
1 year ago
583-45742
583 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
579-72800
1 year ago
891-53679
891 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
579-72691
1 year ago
705-81528
705 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
579-72224
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
579-70623
1 year ago
670-75828
670 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
579-57387
1 year ago
633-77882
633 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
578-71539
1 year ago
609-32121
609 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
578-69408
1 year ago
624-17685
624 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
578-69205
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
578-69068
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
578-69053
1 year ago
695-43758
695 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
578-69015
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
578-69005
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
578-68991
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
578-68981
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
578-68900
1 year ago
800-68327
800 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
578-68865
1 year ago
734-78247
734 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
578-68833
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
578-68687
1 year ago
622-51717
622 days ago
143-73801
143 days
9154 astrainfinita
author:astrainfinita
 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
578-68478
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
578-68452
1 year ago
932-84975
932 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
578-68397
1 year ago
968-18905
968 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
578-68391
1 year ago
944-66445
944 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
578-68259
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
578-67001
1 year ago
610-81193
610 days ago
50-78405
50 days
15585 astrainfinita
author:astrainfinita
 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
577-14267
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
577-14267
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
575-35536
1 year ago
639-25122
639 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. --- - [ ] 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', 'leanprover-community-mathlib4-bot'] nobody
575-35395
1 year ago
703-52336
703 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
575-35294
1 year ago
661-45278
661 days ago
29-50022
29 days
9978 astrainfinita
author:astrainfinita
 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
575-35086
1 year ago
773-29268
773 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
575-34397
1 year ago
686-68470
686 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
575-12960
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
574-76484
1 year ago
693-66877
693 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
574-56448
1 year ago
609-62670
609 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
574-45501
1 year ago
584-5263
584 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
572-58722
1 year ago
691-50350
691 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
572-58702
1 year ago
608-51070
608 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
572-58540
1 year ago
881-82756
881 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
566-72144
1 year ago
615-74031
615 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
565-40420
1 year ago
586-34118
586 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
564-38333
1 year ago
564-42594
564 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
563-63634
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
563-62622
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 90/0 Mathlib/Data/Nat/PartENat.lean 1 3 ['erdOne', 'github-actions', 'urkud'] nobody
561-68338
1 year ago
612-75860
612 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
561-31283
1 year ago
592-76942
592 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
560-48076
1 year ago
564-81585
564 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
559-56136
1 year ago
632-26255
632 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
559-56136
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
554-50880
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
554-11017
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
553-78477
1 year ago
614-32605
614 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
553-54942
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
552-75773
1 year ago
946-71111
946 days ago
2-35869
2 days
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
552-46934
1 year ago
704-59676
704 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
552-4909
1 year ago
860-39091
860 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
548-33842
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
548-14142
1 year ago
630-67102
630 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
545-71096
1 year ago
732-44766
732 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
543-59705
1 year ago
544-56794
544 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
541-22670
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
538-81991
1 year ago
642-62468
642 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
538-42342
1 year ago
626-31289
626 days ago
0-273
4 minutes
17171 astrainfinita
author:astrainfinita
 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
534-40684
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
533-12344
1 year ago
893-62961
893 days ago
0-16
16 seconds
17127 astrainfinita
author:astrainfinita
 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
533-7387
1 year ago
533-7387
533 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
530-38320
1 year ago
545-66394
545 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
530-38320
1 year ago
545-66395
545 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
530-38319
1 year ago
545-62145
545 days ago
0-613
10 minutes
5995 astrainfinita
author:astrainfinita
 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
523-52529
1 year ago
648-73190
648 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
520-84870
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
518-59669
1 year ago
521-57367
521 days ago
49-319
49 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
518-59293
1 year ago
559-5227
559 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
517-10061
1 year ago
635-42680
635 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
514-81733
1 year ago
unknown
0-0
0 seconds
10796 mcdoll
author:mcdoll
 feat(Tactic/Positivity): non-negativity of functions --- This makes the `Finset.sum` and `integral_nonneg` extensions even more useful. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) WIP t-meta 27/0 Mathlib/Tactic/Positivity/Core.lean 1 1 ['YaelDillies'] nobody
512-78315
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
512-60977
1 year ago
661-43075
661 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
510-57518
1 year ago
unknown
0-0
0 seconds
16925 YnirPaz
author:YnirPaz
 feat(SetTheory/Cardinal/Cofinality): aleph index of singular cardinal has infinite cofinality Prove `Ordinal.aleph0_le_cof_of_not_isRegular`. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict WIP t-set-theory 6/0 Mathlib/SetTheory/Cardinal/Cofinality.lean 1 4 ['YnirPaz', 'github-actions', 'vihdzp'] nobody
509-29100
1 year ago
541-70687
541 days ago
2-57220
2 days
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
507-77992
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
499-72305
1 year ago
577-46286
577 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
498-18944
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
498-18698
1 year ago
769-68397
769 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
497-83655
1 year ago
548-72486
548 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
497-31452
1 year ago
562-19898
562 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
496-57665
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
496-2853
1 year ago
496-2853
496 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
494-76524
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
493-45374
1 year ago
529-34686
529 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
493-45005
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
490-10797
1 year ago
797-67267
797 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
488-84206
1 year ago
502-70394
502 days ago
109-82807
109 days
17675 astrainfinita
author:astrainfinita
 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
488-59339
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
487-68599
1 year ago
786-69042
786 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
486-78353
1 year ago
637-73989
637 days ago
63-69226
63 days
16637 astrainfinita
author:astrainfinita
 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
486-77591
1 year ago
551-84947
551 days ago
1-49655
1 day
18765 astrainfinita
author:astrainfinita
 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
486-33852
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
483-59045
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
483-54573
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
483-36216
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
482-41227
1 year ago
710-68655
710 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
481-64569
1 year ago
522-50150
522 days ago
0-74903
20 hours
17623 astrainfinita
author:astrainfinita
 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
481-64569
1 year ago
488-57128
488 days ago
33-53295
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
480-1821
1 year ago
unknown
0-0
0 seconds
17624 astrainfinita
author:astrainfinita
 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
478-15341
1 year ago
522-49020
522 days ago
0-465
7 minutes
17513 astrainfinita
author:astrainfinita
 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
476-60763
1 year ago
520-62628
520 days ago
4-72589
4 days
17515 astrainfinita
author:astrainfinita
 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
476-60762
1 year ago
525-48274
525 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
475-66008
1 year ago
475-66008
475 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
473-42085
1 year ago
473-42085
473 days ago
3-72207
3 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
462-7754
1 year ago
462-7754
462 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
459-20223
1 year ago
485-68005
485 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
457-67549
1 year ago
480-3395
480 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
451-77369
1 year ago
648-51018
648 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
451-77368
1 year ago
737-66849
737 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
451-59629
1 year ago
471-85274
471 days ago
0-370
6 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
451-50924
1 year ago
unknown
0-0
0 seconds
18294 astrainfinita
author:astrainfinita
 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
446-58561
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
438-31858
1 year ago
587-26924
587 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
438-31735
1 year ago
514-31088
514 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
436-6388
1 year ago
1062-8419
1062 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
436-6387
1 year ago
1048-1429
1048 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
434-23928
1 year ago
434-23928
434 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
432-48371
1 year ago
432-48371
432 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
427-54960
1 year ago
427-54960
427 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
425-42235
1 year ago
518-33805
518 days ago
0-4704
1 hour
18474 astrainfinita
author:astrainfinita
 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
425-41990
1 year ago
425-41990
425 days ago
76-67978
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
424-76924
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
424-61321
1 year ago
545-72482
545 days ago
9-13962
9 days
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
424-27240
1 year ago
464-26853
464 days ago
33-8818
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
422-45823
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
422-34494
1 year ago
613-86321
613 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
422-19090
1 year ago
514-29109
514 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
420-74820
1 year ago
420-74820
420 days ago
69-24210
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
419-48899
1 year ago
425-16300
425 days ago
27-52347
27 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
417-78110
1 year ago
480-3415
480 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
412-66247
1 year ago
412-66247
412 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
410-56840
1 year ago
1058-1979
1058 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
410-34345
1 year ago
439-46624
439 days ago
101-64856
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
410-34222
1 year ago
437-15678
437 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
406-45987
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
404-85424
1 year ago
710-68047
710 days ago
91-37374
91 days
18719 astrainfinita
author:astrainfinita
 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
403-60241
1 year ago
unknown
0-0
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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
402-41442
1 year ago
436-77372
436 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
401-40563
1 year ago
480-3407
480 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
400-23557
1 year ago
406-74474
406 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
399-59448
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
399-59447
1 year ago
unknown
0-0
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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
399-59446
1 year ago
unknown
0-0
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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
399-34974
1 year ago
740-58653
740 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
397-51484
1 year ago
418-79754
418 days ago
52-4018
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
395-57903
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
395-57656
1 year ago
402-69278
402 days ago
37-29014
37 days
17005 YnirPaz
author:YnirPaz
 feat(SetTheory/Cardinal/Regular): define singular cardinals Define singular cardinals and prove basic lemmas about them. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict WIP t-set-theory 94/1 Mathlib.lean,Mathlib/SetTheory/Cardinal/Regular.lean,Mathlib/SetTheory/Ordinal/Basic.lean 3 28 ['YaelDillies', 'YnirPaz', 'github-actions', 'vihdzp'] nobody
393-4612
1 year ago
506-24179
506 days ago
34-16079
34 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
390-26427
1 year ago
390-26427
390 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
390-14084
1 year ago
602-72502
602 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
389-67791
1 year ago
810-53122
810 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
388-33455
1 year ago
unknown
0-0
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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
388-32644
1 year ago
395-28709
395 days ago
2-38741
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
387-41328
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
383-79224
1 year ago
391-81854
391 days ago
4-9045
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
383-53957
1 year ago
unknown
0-0
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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
383-52321
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
383-31692
1 year ago
555-62923
555 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
380-44285
1 year ago
631-28885
631 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
378-67375
1 year ago
616-50302
616 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
378-66875
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
378-55779
1 year ago
unknown
0-0
0 seconds
14060 YnirPaz
author:YnirPaz
 feat(SetTheory/Ordinal/Clubs): define club sets and prove basic properties Create a file where club sets are defined and their basic properties are proven. I also created a new recursion principle for ordinals, bounded recursion. --- - [ ] depends on: #19189 [![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 315/3 Mathlib.lean,Mathlib/Order/SuccPred/Limit.lean,Mathlib/SetTheory/Cardinal/Cofinality.lean,Mathlib/SetTheory/Ordinal/Arithmetic.lean,Mathlib/SetTheory/Ordinal/Club.lean,Mathlib/SetTheory/Ordinal/Topology.lean 6 93 ['YaelDillies', 'YnirPaz', 'alreadydone', 'dupuisf', 'github-actions', 'mathlib4-dependent-issues-bot', 'vihdzp', 'zeramorphic'] nobody
378-8678
1 year ago
436-31162
436 days ago
93-453
93 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
377-39344
1 year ago
413-43121
413 days ago
17-17852
17 days
16000 YaelDillies
author:YaelDillies
 feat: Croot-Sisask Almost Periodicity Almost periodicity is nowadays a standard tool in additive combinatorics. From LeanAPAP --- - [ ] depends on: #15443 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-combinatorics t-analysis blocked-by-other-PR 0/0 0 4 ['github-actions', 'leanprover-community-mathlib4-bot', 'mergify'] nobody
376-68665
1 year ago
573-62336
573 days ago
0-159
2 minutes
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
376-55926
1 year ago
383-37853
383 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
376-52268
1 year ago
376-52268
376 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
374-54281
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
374-53200
1 year ago
382-79289
382 days ago
0-2574
42 minutes
18470 astrainfinita
author:astrainfinita
 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
372-23695
1 year ago
372-23695
372 days ago
129-16341
129 days
16944 YnirPaz
author:YnirPaz
 feat(SetTheory/Cardinal/Cofinality): lemmas about limit ordinals and cofinality Prove that a singular cardinal has a limit aleph index and that a limit ordinal and positive cofinality. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict WIP t-set-theory 18/0 Mathlib/SetTheory/Cardinal/Cofinality.lean 1 8 ['YnirPaz', 'github-actions', 'vihdzp'] nobody
371-16571
1 year ago
541-70649
541 days ago
1-84890
1 day
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
370-47764
1 year ago
507-59283
507 days ago
22-48253
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
369-23427
1 year ago
550-75777
550 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
368-52866
1 year ago
375-22131
375 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
368-48094
1 year ago
551-51323
551 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
364-74523
11 months ago
364-74523
364 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
364-20157
11 months ago
624-84048
624 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
362-42190
11 months ago
484-20118
484 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
361-30738
11 months ago
unknown
0-0
0 seconds
19189 YnirPaz
author:YnirPaz
 feat(SetTheory/Ordinal/Arithmetic): order isomorphism between omega and the natural numbers --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict awaiting-author t-set-theory 44/0 Mathlib/Order/SuccPred/Limit.lean,Mathlib/SetTheory/Ordinal/Arithmetic.lean 2 21 ['YaelDillies', 'YnirPaz', 'github-actions', 'vihdzp'] nobody
361-11823
11 months ago
436-31464
436 days ago
47-37012
47 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
359-61226
11 months ago
460-15497
460 days ago
21-82868
21 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
355-18758
11 months ago
580-48301
580 days ago
0-6819
1 hour
16810 urkud
author:urkud
 feat: define `(a : ENat) ^ (b : ENat)` The definition agrees with `Cardinal.toENat`, i.e., `#(α → β) = #β ^ #α`, where `#` is the not-yet-defined `ENat.card α = Cardinal.toENat (Cardinal.mk α)`. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-set-theory t-data 51/0 Mathlib.lean,Mathlib/Data/ENat/Pow.lean 2 1 ['github-actions'] nobody
353-84351
11 months ago
unknown
0-0
0 seconds
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
353-53307
11 months 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
350-75426
11 months ago
413-21100
413 days ago
7-31913
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
349-83493
11 months ago
375-26049
375 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
349-22923
11 months ago
350-27080
350 days ago
0-949
15 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
348-66729
11 months 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
348-59385
11 months ago
364-6476
364 days ago
0-83153
23 hours
13124 astrainfinita
author:astrainfinita
 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
348-962
11 months 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
344-78482
11 months ago
538-55853
538 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
343-71527
11 months ago
364-34967
364 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
343-10454
11 months 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
341-85385
11 months ago
365-3362
365 days ago
12-18667
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
341-64891
11 months 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
341-64402
11 months 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
341-60670
11 months ago
341-60671
341 days ago
57-47357
57 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
341-60668
11 months ago
341-60670
341 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
341-60141
11 months ago
383-64176
383 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
341-60141
11 months ago
383-62917
383 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
341-5106
11 months 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
340-73202
11 months ago
473-61619
473 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
340-63398
11 months ago
415-55598
415 days ago
5-6208
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
339-83407
11 months ago
370-84906
370 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
336-54101
11 months ago
unknown
0-0
0 seconds
16314 astrainfinita
author:astrainfinita
 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
335-85634
11 months ago
335-85636
335 days ago
55-36935
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
335-69287
11 months ago
337-34686
337 days ago
5-26623
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
335-58982
11 months ago
unknown
0-0
0 seconds
24058 astrainfinita
author:astrainfinita
 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
335-48892
11 months 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
335-30887
11 months ago
633-60794
633 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
335-30766
11 months 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
335-30741
11 months 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
335-30699
11 months ago
609-48579
609 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
335-30567
11 months ago
941-73830
941 days ago
29-67421
29 days
15483 astrainfinita
author:astrainfinita
 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
335-30527
11 months ago
583-68857
583 days ago
4-79214
4 days
16594 astrainfinita
author:astrainfinita
 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
335-30303
11 months ago
539-69850
539 days ago
14-58900
14 days
24106 astrainfinita
author:astrainfinita
 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
335-2033
11 months 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
334-84217
11 months 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
333-34643
10 months ago
476-54609
476 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
333-34596
10 months ago
416-45064
416 days ago
8-45680
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
333-34425
10 months ago
369-53692
369 days ago
3-29389
3 days
19613 madvorak
author:madvorak
 refactor(Combinatorics/Optimization/ValuedCSP): make only valid `FractionalOperation` possible Originally `FractionalOperation` was any multiset (possible empty). Then `FractionalOperation.IsValid` said it was nonempty. Instead, I would like to make it nonempty by definition. As a result, empty/invalid fractional operation couldn't be declared at all. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-combinatorics 14/17 Mathlib/Combinatorics/Optimization/ValuedCSP.lean 1 1 ['github-actions'] nobody
333-34143
10 months ago
462-55284
462 days ago
9-74124
9 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
333-30728
10 months ago
413-21701
413 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
331-53106
10 months ago
unknown
0-0
0 seconds
12605 astrainfinita
author:astrainfinita
 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
331-47721
10 months ago
663-79292
663 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
328-73544
10 months ago
341-84185
341 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
328-52976
10 months ago
330-69881
330 days ago
0-217
3 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
326-50319
10 months ago
326-50321
326 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
326-39016
10 months ago
326-39017
326 days ago
2-12017
2 days
8370 eric-wieser
author:eric-wieser
 refactor(Analysis/NormedSpace/Exponential): remove the `𝕂` argument from `exp` This argument is still needed for almost all the lemmas, which means it can longer be found by unification. We keep around `expSeries 𝕂 A`, as it's needed for talking about the radius of convergence over different base fields. This is a prerequisite for #8372, as we can't merge the functions until they have the same interface.\ Zulip thread: [#mathlib4 > Real.exp @ 💬](https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/Real.2Eexp/near/401602245) --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) This is started from the mathport output on https://github.com/leanprover-community/mathlib/pull/19244 merge-conflict t-analysis awaiting-zulip 432/387 Mathlib/Analysis/CStarAlgebra/Exponential.lean,Mathlib/Analysis/CStarAlgebra/Spectrum.lean,Mathlib/Analysis/Normed/Algebra/Exponential.lean,Mathlib/Analysis/Normed/Algebra/MatrixExponential.lean,Mathlib/Analysis/Normed/Algebra/QuaternionExponential.lean,Mathlib/Analysis/Normed/Algebra/Spectrum.lean,Mathlib/Analysis/Normed/Algebra/TrivSqZeroExt.lean,Mathlib/Analysis/NormedSpace/DualNumber.lean,Mathlib/Analysis/SpecialFunctions/ContinuousFunctionalCalculus/ExpLog.lean,Mathlib/Analysis/SpecialFunctions/Exponential.lean,Mathlib/Analysis/SpecialFunctions/Trigonometric/Series.lean 11 29 ['YaelDillies', 'eric-wieser', 'girving', 'github-actions', 'j-loreaux', 'kbuzzard', 'leanprover-community-bot-assistant', 'urkud'] nobody
326-19946
10 months ago
347-32588
347 days ago
24-46029
24 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
324-51473
10 months 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
324-49191
10 months ago
376-61212
376 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
323-32329
10 months 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
322-66387
10 months ago
347-69401
347 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
322-58791
10 months ago
390-8466
390 days ago
23-20117
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
321-51459
10 months ago
373-37825
373 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
320-56698
10 months ago
610-55443
610 days ago
0-109
1 minute
13649 astrainfinita
author:astrainfinita
 chore: redefine `Nat.div2` `Nat.bodd` The new definitions are faster than the old ones. `Nat.binaryRec` will be moved to batteries (https://github.com/leanprover-community/batteries/pull/799) or core (https://github.com/leanprover/lean4/pull/3756), so relevant contents are moved to a new file temporarily. --- - [x] depends on: #15567 - [x] depends on: #19666 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict 63/88 Mathlib/Computability/Primrec.lean,Mathlib/Data/Int/Bitwise.lean,Mathlib/Data/Nat/Bits.lean,Mathlib/Data/Nat/Bitwise.lean,Mathlib/Data/Nat/Size.lean,Mathlib/Logic/Denumerable.lean,Mathlib/Logic/Encodable/Basic.lean,Mathlib/Logic/Equiv/Nat.lean 8 15 ['astrainfinita', 'digama0', 'eric-wieser', 'github-actions', 'leanprover-community-bot-assistant', 'mathlib4-dependent-issues-bot', 'urkud'] digama0
assignee:digama0
318-22566
10 months ago
318-22568
318 days ago
87-49908
87 days
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
317-81911
10 months ago
318-64834
318 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
317-81743
10 months 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
317-81567
10 months 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
317-81482
10 months 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
317-81295
10 months 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
317-81275
10 months 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
317-81265
10 months 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
317-81249
10 months 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
317-81244
10 months ago
612-67798
612 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
317-81204
10 months ago
623-11149
623 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
317-81089
10 months 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
317-81024
10 months 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
317-80835
10 months ago
848-52515
848 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
317-80823
10 months ago
870-75818
870 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
317-80817
10 months 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
317-80812
10 months ago
unknown
0-0
0 seconds
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
317-80765
10 months 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
317-80731
10 months 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
317-80727
10 months ago
546-42100
546 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
317-80713
10 months 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
317-80597
10 months ago
unknown
0-0
0 seconds
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
317-80564
10 months ago
unknown
0-0
0 seconds
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
317-80377
10 months ago
unknown
0-0
0 seconds
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
316-73048
10 months ago
unknown
0-0
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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
316-64381
10 months ago
323-6533
323 days ago
55-70108
55 days
23546 JovanGerb
author:JovanGerb
 feat(LinearAlgebra/AffineSpace/AffineSubspace): rename `AffineSubspace.mk'` to `Submodule.shift` In addition to renaming, I've refactored the code a bit: - `mem_mk'_iff_vsub_mem` was obsolete since it was the same as `mem_mk'`, so I removed it (this is due to a change in the definition I made recently) - I added a nonempty instance for `shift` - I added a simp lemma that `shift` isn't equal to `⊥` (the empty affine subspace). I need this for the next point. - Edit: I'll leave this for a later PR. ~I proved a simp lemma that a `shift` is parallel to a `shift` if and only if the linear subspaces are the same.~ - I renamed `mk'_eq` to `shift_direction_eq_self `. - I renamed `eq_or_eq_secondInter_of_mem_mk'_span_singleton_iff_mem` to `eq_or_eq_secondInter_iff_mem_of_mem_shift_span_singleton`. I think it is better to put the `of_mem_mk'_span_singleton` at the end of the name. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-euclidean-geometry 128/99 Mathlib/Algebra/Module/ZLattice/Basic.lean,Mathlib/Geometry/Euclidean/Basic.lean,Mathlib/Geometry/Euclidean/MongePoint.lean,Mathlib/Geometry/Euclidean/PerpBisector.lean,Mathlib/Geometry/Euclidean/Sphere/SecondInter.lean,Mathlib/Geometry/Euclidean/Sphere/Tangent.lean,Mathlib/LinearAlgebra/AffineSpace/AffineSubspace/Defs.lean 7 4 ['JovanGerb', 'github-actions', 'leanprover-community-bot-assistant'] nobody
316-55548
10 months ago
323-32581
323 days ago
26-22460
26 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
316-35449
10 months ago
unknown
0-0
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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
315-27846
10 months ago
584-51031
584 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
314-29807
10 months ago
391-54830
391 days ago
43-81252
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
313-41131
10 months ago
unknown
0-0
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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
312-25687
10 months ago
312-25687
312 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
311-47881
10 months ago
311-47881
311 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
309-73425
10 months ago
309-73425
309 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
308-49806
10 months ago
unknown
0-0
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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
307-71490
10 months 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
307-65865
10 months ago
unknown
0-0
0 seconds
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
307-50195
10 months ago
325-6747
325 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
306-60958
10 months ago
315-40960
315 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
305-62200
10 months ago
551-55018
551 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
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 1 ['github-actions'] nobody
304-60102
10 months ago
304-59915
304 days ago
0-874
14 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
303-56736
9 months ago
847-81091
847 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
302-1740
9 months ago
420-61928
420 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
298-27311
9 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
295-58029
9 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
293-45766
9 months ago
293-45768
293 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
288-58392
9 months ago
690-21263
690 days ago
0-20
20 seconds
8740 digama0
author:digama0
 fix: improve `recall` impl / error reporting Simplifies the implementation of `recall`, fixing a bug [reported on Zulip](https://leanprover.zulipchat.com/#narrow/stream/113488-general/topic/.60recall.60.20strangeness/near/405076713) and also eliminating a use of `open private`. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict awaiting-author awaiting-CI t-meta 27/39 Mathlib/Tactic/Recall.lean 1 2 ['github-actions', 'leanprover-community-bot-assistant'] nobody
286-75653
9 months ago
837-45149
837 days ago
0-24848
6 hours
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
286-53150
9 months ago
519-18183
519 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
284-62333
9 months ago
284-63224
284 days ago
0-10787
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
284-9373
9 months ago
481-56714
481 days ago
87-65922
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
284-9373
9 months ago
571-70353
571 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 bench-after-CI
label:t-algebra$
 20/35 Mathlib/RingTheory/Valuation/ValuationRing.lean 1 2 ['github-actions', 'leanprover-community-bot-assistant'] nobody
284-852
9 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
283-17719
9 months ago
666-45372
666 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
282-69408
9 months ago
344-61086
344 days ago
0-7729
2 hours
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
282-68593
9 months ago
282-68595
282 days ago
6-39812
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
281-85260
9 months ago
398-35139
398 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
281-70556
9 months ago
282-13160
282 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
278-22907
9 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
276-10272
9 months ago
414-48253
414 days ago
27-62333
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
274-54021
9 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
274-52734
9 months ago
274-53431
274 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
274-52165
9 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
273-51752
9 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
272-40032
8 months ago
272-40048
272 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
270-74889
8 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
270-60334
8 months ago
502-58233
502 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
270-60332
8 months ago
502-59876
502 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
270-60331
8 months ago
502-60518
502 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
269-31865
8 months ago
269-31865
269 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
267-42622
8 months ago
505-68838
505 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
267-28644
8 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
266-26661
8 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
262-81344
8 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
262-77318
8 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
258-58447
8 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
255-10419
8 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
255-8195
8 months ago
526-42238
526 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
255-7689
8 months ago
367-58261
367 days ago
0-1295
21 minutes
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
255-7688
8 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
255-7283
8 months ago
255-7283
255 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
255-7282
8 months ago
255-7282
255 days ago
40-60910
40 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
255-7036
8 months ago
255-7037
255 days ago
45-4562
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
255-7034
8 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
255-7033
8 months ago
287-68550
287 days ago
6-44784
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
255-7030
8 months ago
293-30784
293 days ago
0-30
30 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
255-7018
8 months ago
271-44741
271 days ago
10-56011
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
255-6889
8 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
255-6724
8 months ago
255-6724
255 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
255-6722
8 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
255-4734
8 months ago
271-60442
271 days ago
0-1118
18 minutes
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
255-4455
8 months ago
262-77661
262 days ago
0-2032
33 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
255-4453
8 months ago
262-74281
262 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
254-62118
8 months ago
254-61025
254 days ago
32-74826
32 days
24405 mcdoll
author:mcdoll
 refactor(Topology/Algebra/Module/WeakDual): Clean up - Move `Dual` and `dualPairing` lower in the import-hierachy - deduplicate `dualPairing` - Make `WeakDual` and `WeakSpace` reducible --- New version of #11500 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-topology large-import 146/162 Mathlib.lean,Mathlib/Analysis/Fourier/RiemannLebesgueLemma.lean,Mathlib/Analysis/InnerProductSpace/Adjoint.lean,Mathlib/Analysis/InnerProductSpace/Dual.lean,Mathlib/Analysis/LocallyConvex/WeakSpace.lean,Mathlib/Analysis/Normed/Module/Dual.lean,Mathlib/Analysis/Normed/Module/WeakDual.lean,Mathlib/Analysis/VonNeumannAlgebra/Basic.lean,Mathlib/MeasureTheory/Function/AEEqOfIntegral.lean,Mathlib/MeasureTheory/Measure/FiniteMeasure.lean,Mathlib/Topology/Algebra/Module/Dual.lean,Mathlib/Topology/Algebra/Module/WeakDual.lean,docs/overview.yaml,docs/undergrad.yaml 14 2 ['github-actions', 'leanprover-community-bot-assistant'] nobody
253-58553
8 months ago
253-58554
253 days ago
69-52361
69 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
253-10314
8 months ago
253-29521
253 days ago
3-72995
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
251-76645
8 months ago
252-40196
252 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
251-74502
8 months ago
251-74502
251 days ago
20-8582
20 days
10541 xgenereux
author:xgenereux
 feat(Algebra/SkewMonoidAlgebra/Basic): add SkewMonoidAlgebra # Skew Monoid algebras This file presents a skewed version of `Mathlib.Algebra.MonoidAlgebra.Basic`. ## Definition We define `SkewMonoidAlgebra k G := G →₀ k` attached with a skewed convolution product. Here, the product of two elements `f g : SkewMonoidAlgebra k G` is the finitely supported function whose value at `a` is the sum of `f x * (x • g y)` over all pairs `x, y` such that `x * y = a`. This will be used in a later PR to define skew polynomial rings. Co-authored-by: María Inés de Frutos Fernández <[mariaines.dff@gmail.com](mailto:mariaines.dff@gmail.com)> --- - [x] depends on: #15878 - [x] depends on: #19084 - [x] depends on: #22078 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict WIP t-algebra new-contributor
label:t-algebra$
 1624/0 Mathlib.lean,Mathlib/Algebra/Group/InjSurj.lean,Mathlib/Algebra/SkewMonoidAlgebra/Basic.lean,Mathlib/Algebra/SkewMonoidAlgebra/Lift.lean 4 105 ['AntoineChambert-Loir', 'YaelDillies', 'eric-wieser', 'fpvandoorn', 'github-actions', 'mariainesdff', 'mathlib4-dependent-issues-bot', 'mattrobball', 'xgenereux'] AntoineChambert-Loir
assignee:AntoineChambert-Loir
250-62511
8 months ago
577-66077
577 days ago
179-14511
179 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
249-80576
8 months ago
251-74504
251 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
248-55302
8 months ago
248-56724
248 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
248-37204
8 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 - `mul_left_monotone` and `mul_right_monotone` are exactly the wrong way around - `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/) merge-conflict delegated 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/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/PSeries.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/Chunk.lean,Mathlib/Combinatorics/SimpleGraph/Regularity/Lemma.lean,Mathlib/Computability/Ackermann.lean,Mathlib/Data/ENNReal/Inv.lean,Mathlib/Data/ENNReal/Operations.lean,Mathlib/Data/Nat/Choose/Factorization.lean,Mathlib/Data/Real/Pi/Bounds.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/Padics/Hensel.lean,Mathlib/Order/Concept.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/Different.lean,Mathlib/RingTheory/DedekindDomain/Ideal.lean,Mathlib/RingTheory/FractionalIdeal/Basic.lean,Mathlib/RingTheory/FractionalIdeal/Operations.lean,Mathlib/Topology/EMetricSpace/Lipschitz.lean,Mathlib/Topology/MetricSpace/Antilipschitz.lean,Mathlib/Topology/MetricSpace/Holder.lean 59 8 ['JovanGerb', 'bryangingechen', 'github-actions', 'leanprover-community-bot-assistant', 'linesthatinterlace', 'mathlib-bors'] bryangingechen
assignee:bryangingechen
248-15909
8 months ago
248-56908
248 days ago
2-53782
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
244-63320
8 months ago
277-44675
277 days ago
3-31703
3 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
242-69781
7 months ago
385-69286
385 days ago
31-68555
31 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
238-13906
7 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
237-27860
7 months ago
243-80027
243 days ago
45-38763
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
236-71146
7 months ago
256-56862
256 days ago
0-10699
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
236-43407
7 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
235-72159
7 months ago
248-73925
248 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
235-51014
7 months ago
235-51352
235 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
234-15328
7 months ago
313-27433
313 days ago
0-328
5 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
230-55319
7 months ago
579-58772
579 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
228-65635
7 months ago
699-74569
699 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
228-65573
7 months ago
765-58499
765 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
228-65482
7 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
228-63216
7 months ago
274-48307
274 days ago
0-1208
20 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
228-48459
7 months ago
448-29560
448 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
228-18031
7 months ago
299-65071
299 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
228-18020
7 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
227-66441
7 months ago
227-67639
227 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
227-52896
7 months ago
231-36760
231 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
227-50741
7 months ago
unknown
0-0
0 seconds
27826 xgenereux
author:xgenereux
 feat(Subsemiring): mk_eq_zero Add a `mk_eq_zero` lemma for `Subsemiring`. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) WIP t-algebra
label:t-algebra$
 4/0 Mathlib/Algebra/Ring/Subsemiring/Defs.lean 1 3 ['eric-wieser', 'github-actions', 'xgenereux'] nobody
227-47923
7 months ago
227-51005
227 days ago
0-8982
2 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 21/9 Mathlib/Tactic/Lift.lean,MathlibTest/lift.lean 2 8 ['JovanGerb', 'adomani', 'eric-wieser', 'github-actions', 'leanprover-community-bot-assistant', 'mathlib4-dependent-issues-bot', 'vihdzp'] JovanGerb
assignee:JovanGerb
226-13942
7 months ago
226-60842
226 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
224-72124
7 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
224-72006
7 months ago
255-6723
255 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
224-71999
7 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
224-71994
7 months ago
273-28812
273 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
224-71980
7 months ago
273-28979
273 days ago
0-51
51 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 blocked-by-other-PR 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', 'mathlib4-dependent-issues-bot', 'ocfnash'] nobody
224-71779
7 months ago
unknown
0-0
0 seconds
25425 Paul-Lez
author:Paul-Lez
 feat(LinearAlgebra/Basis/HasCanonicalBasis): propose `HasCanonicalBasis` class Context: in some cases, e.g. writing down PDEs, having a notion of partial derivatives can be useful. In an ideal world (as mentioned by @ocfnash in [this Zulip thread](https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/Partial.20derivatives/with/463936246)), one could write something along the lines of `open scoped PartialDerivatives` in order to access nice notation for this. This PR introduces a notion of a canonical basis for a module in order to allow taking partial derivatives with respect to it. A later PR (which I am about open) would then propose a notation for taking partial derivatives (defined using `lineDeriv` in order to avoid requiring Frechet-differentiability assumptions). The goal here is to have notation that works equally well on e.g. `𝕜 × 𝕜` and `EuclideanSpace 𝕜 (Fin 2)` and so on. I've opened this PR as a draft in order to get some initial feedback on the content (and whether this is considered appropriate for Mathlib!); the file itself would need to be split (e.g. the instances defined should probably go in different files) Co-authored-by: Eric Wieser --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-algebra
label:t-algebra$
 105/0 Mathlib.lean,Mathlib/LinearAlgebra/Basis/HasCanonicalBasis.lean 2 2 ['github-actions', 'leanprover-community-bot-assistant'] nobody
224-71774
7 months ago
unknown
0-0
0 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
224-71769
7 months ago
287-65551
287 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
224-71764
7 months ago
255-7033
255 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
224-71724
7 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
224-50483
7 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
223-74191
7 months ago
265-12214
265 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
223-73906
7 months ago
368-24712
368 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
223-73858
7 months ago
368-24711
368 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
223-73851
7 months ago
358-19744
358 days ago
10-44563
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
223-73807
7 months ago
399-72841
399 days ago
32-79324
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
223-73792
7 months ago
428-49726
428 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
223-73785
7 months ago
496-82354
496 days ago
0-1609
26 minutes
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
223-73779
7 months ago
485-9272
485 days ago
13-6188
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
223-73723
7 months ago
403-58283
403 days ago
0-19114
5 hours
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
223-73522
7 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
223-73515
7 months ago
436-74854
436 days ago
193-74502
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
223-71250
7 months ago
224-77991
224 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
223-22717
7 months ago
223-22717
223 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
223-18066
7 months ago
526-61173
526 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
223-7425
7 months ago
291-83346
291 days ago
0-444
7 minutes
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
223-5636
7 months ago
229-19277
229 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
222-23524
7 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 11/9 Mathlib/Algebra/BigOperators/Finsupp/Basic.lean,Mathlib/Data/Finsupp/Indicator.lean 2 3 ['github-actions', 'ocfnash', 'tristan-f-r'] nobody
220-32349
7 months ago
220-76168
220 days ago
0-32626
9 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
219-17784
7 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
218-77326
7 months ago
419-52141
419 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
218-70293
7 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
217-55220
7 months ago
217-55221
217 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
217-54849
7 months ago
217-54850
217 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
217-50845
7 months ago
217-50881
217 days ago
0-749
12 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
217-48570
7 months ago
307-29929
307 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
215-70009
7 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
215-69473
7 months ago
215-69474
215 days ago
32-70098
32 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 11 ['faenuccio', 'ggranberry', 'github-actions'] faenuccio
assignee:faenuccio
215-69196
7 months ago
363-54078
363 days ago
0-1302
21 minutes
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
215-37445
7 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
215-24269
7 months ago
215-24269
215 days ago
71-28496
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
213-77115
7 months ago
227-55951
227 days ago
0-5704
1 hour
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. --- - [ ] 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', 'leanprover-community-mathlib4-bot', 'mattrobball'] nobody
213-47619
7 months ago
611-45571
611 days ago
7-77799
7 days
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
212-76664
7 months ago
398-2753
398 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
212-67010
7 months ago
426-58980
426 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
212-58524
7 months ago
235-33079
235 days ago
0-92
1 minute
14583 lecopivo
author:lecopivo
 fix: make concrete cycle notation local fix: make c[...] notation for concrete cycles local --- The notation for concrete cycles prevents you using `c[i]` notation for `c : Array _` This currently does not work ``` import Mathlib variable (c : Array Nat) (i : Fin c.size) #check c[i] -- breaks because of notation for concrete cycles ``` This PR just marks it as local to prevent this issue. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict awaiting-author 1/1 Mathlib/GroupTheory/Perm/Cycle/Concrete.lean 1 3 ['eric-wieser', 'github-actions', 'mathlib4-merge-conflict-bot'] nobody
210-77838
6 months ago
615-28004
615 days ago
0-12793
3 hours
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
210-67824
6 months ago
636-80626
636 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
210-67095
6 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
210-2422
6 months ago
212-74351
212 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
209-27749
6 months ago
209-27750
209 days ago
0-66771
18 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
209-23388
6 months ago
307-54837
307 days ago
1-55872
1 day
26645 erdOne
author:erdOne
 feat(RingTheory/PowerSeries): Construction of `Q` such that `P(Q(X)) = X` Co-authored-by: Junnosuke Koizumi Co-authored-by: Hyeon, Seung-Hyeon Co-authored-by: Yuichiro Taguchi This contribution was created as part of the ZMC conference 2025 "Anabelian Geometry and its Computer Formalization". --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) awaiting-author t-ring-theory 133/0 Mathlib/RingTheory/PowerSeries/Substitution.lean 1 9 ['chrisflav', 'erdOne', 'github-actions', 'kckennylau'] kbuzzard
assignee:kbuzzard
208-79000
6 months ago
208-79000
208 days ago
48-29860
48 days
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
207-56875
6 months ago
207-56876
207 days ago
2-47570
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'] dagurtomas
assignee:dagurtomas
207-53885
6 months ago
207-53885
207 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
207-38930
6 months ago
430-9489
430 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
207-15561
6 months ago
907-54446
907 days ago
0-84
1 minute
13795 astrainfinita
author:astrainfinita
 perf(Algebra/{Group, GroupWithZero, Ring}/InjSurj): reduce everything --- - [ ] depends on: #15192 - [ ] depends on: #15476 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-algebra
label:t-algebra$
 340/194 Mathlib/Algebra/Equiv/TransferInstance.lean,Mathlib/Algebra/Group/InjSurj.lean,Mathlib/Algebra/GroupWithZero/Action/Defs.lean,Mathlib/Algebra/GroupWithZero/Action/End.lean,Mathlib/Algebra/GroupWithZero/InjSurj.lean,Mathlib/Algebra/Module/Defs.lean,Mathlib/Algebra/Module/RingHom.lean,Mathlib/Algebra/Ring/InjSurj.lean,scripts/noshake.json 9 37 ['MichaelStollBayreuth', 'astrainfinita', 'eric-wieser', 'github-actions', 'leanprover-bot', 'leanprover-community-bot-assistant', 'mathlib4-dependent-issues-bot', 'mattrobball'] nobody
206-62946
6 months ago
335-77951
335 days ago
47-81764
47 days
28095 Equilibris
author:Equilibris
 Univ generic corec Draft PR: Adding variable universe corecursor for PFunctor --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict new-contributor 321/70 Mathlib/Data/PFunctor/Multivariate/Basic.lean,Mathlib/Data/PFunctor/Multivariate/M.lean,Mathlib/Data/TypeVec.lean 3 7 ['Equilibris', 'alexkeizer', 'github-actions', 'mathlib4-merge-conflict-bot'] nobody
206-24192
6 months ago
unknown
0-0
0 seconds
28150 Equilibris
author:Equilibris
 chore: clean up proofs typevec proofs While adding variable universe corecs I found a lot of theorems in typevec that could do with a bit of a clean-up --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-data new-contributor 24/26 Mathlib/Data/TypeVec.lean 1 7 ['Equilibris', 'alexkeizer', 'github-actions', 'mathlib4-merge-conflict-bot'] nobody
206-24191
6 months ago
206-24192
206 days ago
13-49738
13 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
206-3511
6 months ago
228-65833
228 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
206-3465
6 months ago
215-54909
215 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
205-65132
6 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
205-51743
6 months ago
228-65834
228 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
205-51504
6 months ago
234-49201
234 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
204-54954
6 months ago
204-60398
204 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
202-76441
6 months ago
224-58418
224 days ago
85-42087
85 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
201-54324
6 months ago
221-18935
221 days ago
14-27544
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
201-8677
6 months ago
201-8678
201 days ago
13-2028
13 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)) * card V ^ 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/) merge-conflict WIP blocked-by-other-PR t-combinatorics 757/14 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
200-58517
6 months ago
208-75460
208 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
200-58516
6 months ago
208-75233
208 days ago
0-74
1 minute
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
200-58515
6 months ago
208-75049
208 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
200-30726
6 months ago
250-26082
250 days ago
0-311
5 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
200-30601
6 months ago
245-57055
245 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
200-30599
6 months ago
244-77548
244 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
200-30598
6 months ago
244-44680
244 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
200-7373
6 months ago
unknown
0-0
0 seconds
28279 Equilibris
author:Equilibris
 feat: univ generic W A simple change making `W.ind`'s motive universe generic. --- A theorem `w_ind_eq` will now be needed, but this will depend on getting `dcongr_heq` merged, and hence I will do this in a separate PR. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-data new-contributor 16/21 Mathlib/Data/PFunctor/Multivariate/W.lean 1 8 ['Equilibris', 'alexkeizer', 'github-actions'] nobody
197-36713
6 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
196-70793
6 months ago
277-78928
277 days ago
0-829
13 minutes
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
196-70183
6 months ago
230-74430
230 days ago
19-75957
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
196-37443
6 months ago
226-21122
226 days ago
1-28996
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
196-5150
6 months ago
294-62997
294 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
195-22678
6 months ago
203-60232
203 days ago
0-19882
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
194-24788
6 months ago
249-71282
249 days ago
0-75052
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
192-83063
6 months ago
193-56312
193 days ago
17-74458
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
191-55967
6 months ago
215-47495
215 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
189-55023
6 months ago
189-55024
189 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
189-50062
6 months ago
244-79757
244 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
189-22872
6 months ago
189-53975
189 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
188-63913
6 months ago
245-85225
245 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
188-57774
6 months ago
188-57775
188 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
187-77338
6 months ago
205-64275
205 days ago
0-601
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
187-27098
6 months ago
666-66030
666 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
187-16251
6 months ago
187-16996
187 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
187-10740
6 months ago
191-19698
191 days ago
0-22091
6 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
186-53496
6 months ago
277-61334
277 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
186-25759
6 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
185-31081
6 months ago
378-32662
378 days ago
0-27
27 seconds
27933 grunweg
author:grunweg
 chore(OrdNode): format code example in code blocks Wrap them in code blocks (and unindent them; that indentation is not needed any more). This also avoids warnings from the linter in #27898. ------- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-data 459/212 Mathlib/Data/Ordmap/Ordnode.lean 1 4 ['eric-wieser', 'github-actions', 'grunweg', 'mathlib4-merge-conflict-bot'] nobody
185-8407
6 months ago
185-8408
185 days ago
39-69478
39 days
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 bench-after-CI 9/1 Mathlib/Analysis/Complex/Basic.lean 1 1 ['github-actions'] nobody
184-71940
6 months ago
184-71919
184 days ago
0-104
1 minute
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/) merge-conflict large-import awaiting-CI t-meta 144/26 Mathlib.lean,Mathlib/Tactic.lean,Mathlib/Tactic/Basic.lean,Mathlib/Tactic/TacticAnalysis/Declarations.lean,Mathlib/Tactic/TacticAnalysis/FunProp.lean,MathlibTest/TacticAnalysis2.lean 6 12 ['Vierkantor', 'github-actions', 'grunweg', 'mathlib4-merge-conflict-bot'] nobody
184-57065
6 months ago
205-67271
205 days ago
0-260
4 minutes
29633 sgouezel
author:sgouezel
 Just for bench --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict 1046/690 .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/ContinuousFunctionalCalculus/Instances.lean,Mathlib/Analysis/Normed/Module/Basic.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,MathlibTest/toAdditive.lean,lake-manifest.json 103 1 ['sgouezel'] nobody
183-79049
6 months ago
183-79090
183 days ago
0-11
11 seconds
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
183-46282
6 months ago
199-78091
199 days ago
100-20975
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
183-46281
6 months ago
209-47245
209 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
182-74575
6 months ago
207-37953
207 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
182-70018
6 months ago
182-70019
182 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
182-60675
6 months ago
214-46805
214 days ago
28-14094
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
182-58634
6 months ago
211-4910
211 days ago
0-1522
25 minutes
29614 sgouezel
author:sgouezel
 Sg test4 --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict 2788/3328 .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/Algebra/RestrictScalars.lean,Mathlib/Algebra/Algebra/Subalgebra/Basic.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/InjSurj.lean,Mathlib/Algebra/Ring/Rat.lean,Mathlib/Algebra/Ring/Subring/Defs.lean,Mathlib/Analysis/Analytic/Composition.lean,Mathlib/Analysis/Analytic/Order.lean,Mathlib/Analysis/CStarAlgebra/ApproximateUnit.lean,Mathlib/Analysis/CStarAlgebra/Basic.lean,Mathlib/Analysis/CStarAlgebra/CStarMatrix.lean,Mathlib/Analysis/CStarAlgebra/Classes.lean,Mathlib/Analysis/CStarAlgebra/CompletelyPositiveMap.lean,Mathlib/Analysis/CStarAlgebra/ContinuousFunctionalCalculus/Basic.lean,Mathlib/Analysis/CStarAlgebra/ContinuousFunctionalCalculus/Instances.lean,Mathlib/Analysis/CStarAlgebra/ContinuousLinearMap.lean,Mathlib/Analysis/CStarAlgebra/ContinuousMap.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/Unitization.lean,Mathlib/Analysis/CStarAlgebra/lpSpace.lean,Mathlib/Analysis/Calculus/BumpFunction/FiniteDimension.lean,Mathlib/Analysis/Calculus/ContDiff/Basic.lean,Mathlib/Analysis/Calculus/ContDiff/Operations.lean,Mathlib/Analysis/Calculus/DSlope.lean,Mathlib/Analysis/Calculus/Deriv/CompMul.lean,Mathlib/Analysis/Calculus/Deriv/Inv.lean,Mathlib/Analysis/Calculus/DiffContOnCl.lean,Mathlib/Analysis/Calculus/FDeriv/Equiv.lean,Mathlib/Analysis/Calculus/FDeriv/Mul.lean,Mathlib/Analysis/Calculus/FDeriv/Symmetric.lean,Mathlib/Analysis/Calculus/LineDeriv/QuadraticMap.lean,Mathlib/Analysis/Calculus/MeanValue.lean,Mathlib/Analysis/Calculus/SmoothSeries.lean,Mathlib/Analysis/Calculus/UniformLimitsDeriv.lean,Mathlib/Analysis/Complex/Basic.lean,Mathlib/Analysis/Complex/Hadamard.lean,Mathlib/Analysis/Complex/Norm.lean,Mathlib/Analysis/Complex/Tietze.lean,Mathlib/Analysis/Fourier/FourierTransform.lean,Mathlib/Analysis/Fourier/FourierTransformDeriv.lean,Mathlib/Analysis/InnerProductSpace/Basic.lean,Mathlib/Analysis/InnerProductSpace/Calculus.lean,Mathlib/Analysis/InnerProductSpace/Completion.lean,Mathlib/Analysis/InnerProductSpace/Defs.lean,Mathlib/Analysis/InnerProductSpace/MulOpposite.lean,Mathlib/Analysis/InnerProductSpace/OfNorm.lean,Mathlib/Analysis/InnerProductSpace/Orthonormal.lean,Mathlib/Analysis/InnerProductSpace/PiL2.lean,Mathlib/Analysis/InnerProductSpace/ProdL2.lean,Mathlib/Analysis/InnerProductSpace/Projection/Minimal.lean,Mathlib/Analysis/InnerProductSpace/Subspace.lean,Mathlib/Analysis/InnerProductSpace/l2Space.lean,Mathlib/Analysis/LocallyConvex/WithSeminorms.lean,Mathlib/Analysis/Matrix.lean,Mathlib/Analysis/Meromorphic/Basic.lean,Mathlib/Analysis/Normed/Affine/ContinuousAffineMap.lean,Mathlib/Analysis/Normed/Algebra/Spectrum.lean,Mathlib/Analysis/Normed/Algebra/TrivSqZeroExt.lean,Mathlib/Analysis/Normed/Algebra/Unitization.lean,Mathlib/Analysis/Normed/Algebra/UnitizationL1.lean,Mathlib/Analysis/Normed/Field/Basic.lean,Mathlib/Analysis/Normed/Field/WithAbs.lean,Mathlib/Analysis/Normed/Group/AddCircle.lean,Mathlib/Analysis/Normed/Group/Basic.lean,Mathlib/Analysis/Normed/Group/Completion.lean,Mathlib/Analysis/Normed/Group/Constructions.lean,Mathlib/Analysis/Normed/Group/Continuity.lean,Mathlib/Analysis/Normed/Group/Hom.lean,Mathlib/Analysis/Normed/Group/Int.lean,Mathlib/Analysis/Normed/Group/Quotient.lean,Mathlib/Analysis/Normed/Group/Rat.lean,Mathlib/Analysis/Normed/Group/SemiNormedGrp.lean,Mathlib/Analysis/Normed/Group/Subgroup.lean,Mathlib/Analysis/Normed/Group/Submodule.lean,Mathlib/Analysis/Normed/Group/Ultra.lean,Mathlib/Analysis/Normed/Group/Uniform.lean,Mathlib/Analysis/Normed/Lp/PiLp.lean,Mathlib/Analysis/Normed/Lp/ProdLp.lean,Mathlib/Analysis/Normed/Lp/lpSpace.lean,Mathlib/Analysis/Normed/Module/Basic.lean,Mathlib/Analysis/Normed/Module/Completion.lean,Mathlib/Analysis/Normed/Module/FiniteDimension.lean,Mathlib/Analysis/Normed/Operator/BoundedLinearMaps.lean,Mathlib/Analysis/Normed/Order/Hom/Basic.lean,Mathlib/Analysis/Normed/Order/Hom/Ultra.lean 251 1 ['sgouezel'] nobody
181-60196
6 months ago
184-78879
184 days ago
0-10
10 seconds
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
181-36478
6 months ago
181-35936
181 days ago
0-71078
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
180-73211
5 months ago
206-73996
206 days ago
17-62721
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
180-68820
5 months ago
180-75926
180 days ago
0-15
15 seconds
29750 sgouezel
author:sgouezel
 Branch just before the class_abbrev core PR, just for benching Branch just before the class_abbrev core PR, just for benching --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict 1041/684 .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/ContinuousFunctionalCalculus/Instances.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/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,MathlibTest/toAdditive.lean,lake-manifest.json,lakefile.lean,lean-toolchain 101 1 ['sgouezel'] nobody
180-55422
5 months ago
180-55469
180 days ago
0-12
12 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
180-31739
5 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
179-62803
5 months ago
224-34440
224 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
177-64938
5 months ago
221-79001
221 days ago
0-2498
41 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
175-41304
5 months ago
189-61476
189 days ago
13-55255
13 days
25480 ocfnash
author:ocfnash
 feat: define a concrete model of the `𝔤₂` root system This is a bit of an experiment to test API but it should also make it easier to prove some properties of `𝔤₂`. --- - [x] depends on: #25477 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict WIP t-algebra large-import
label:t-algebra$
 120/15 Mathlib/LinearAlgebra/RootSystem/Defs.lean,Mathlib/LinearAlgebra/RootSystem/Finite/G2.lean,Mathlib/LinearAlgebra/RootSystem/Reduced.lean 3 9 ['eric-wieser', 'github-actions', 'leanprover-community-bot-assistant', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot', 'ocfnash'] nobody
173-83504
5 months ago
284-67612
284 days ago
0-1
1 second
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
173-81615
5 months ago
173-81616
173 days ago
19-81030
19 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
173-56974
5 months ago
185-61337
185 days ago
0-1498
24 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
173-5473
5 months ago
188-31912
188 days ago
0-160
2 minutes
29657 jcreinhold
author:jcreinhold
 feat(CategoryTheory/MarkovCategory): add Markov categories This PR adds Markov categories to the category theory library. A Markov category is a symmetric monoidal category where every object has canonical copy and delete morphisms that form commutative comonoids. ## What this gives mathlib In a Markov category, morphisms model probabilistic processes. The copy morphism `X → X ⊗ X` creates perfect correlation (both outputs always equal). The delete morphism `X → I` marginalizes (sums/integrates out variables). This structure captures probability theory categorically. The same theorem proves results for: - Finite probability (stochastic matrices) - Measure theory (Markov kernels) - Kleisli categories of probability monads Fritz (2020) used this to prove categorical versions of Fisher-Neyman, Basu's theorem, and other core statistics results. ## Implementation - `MarkovCategory`: Extends `SymmetricCategory` with canonical comonoid structure - `copyMor X : X ⟶ X ⊗ X` and `delMor X : X ⟶ I` for each object - Coherence axioms: commutativity, counitality, coassociativity - Compatibility with tensor products Key design point: The comonoid structure is canonical (fields of the typeclass), not chosen. This matches the probability interpretation where there's exactly one way to copy/marginalize. ## Examples included 1. Cartesian categories: Every cartesian monoidal category forms a Markov category where copy is the diagonal `x ↦ (x,x)` and delete is the terminal morphism. All morphisms are deterministic. 2. FinStoch: Objects are finite types. Morphisms are stochastic matrices (rows sum to 1). This models finite probability spaces with the usual matrix multiplication for composition. ## Scope and review notes This PR provides the basic structure only. Future PRs would add: - Conditional independence - Sufficient statistics - Connection to measure-theoretic probability - More examples (Kleisli categories, Gaussian categories) I'm neither an expert in this material nor in Lean; I've only read a few papers on Markov categories and have gone through tutorial material in Lean. Please review for mathematical correctness and idiomatic Lean. I kept this PR small to check if mathlib wants this addition and to ensure it meets repository standards. ## Why add this now Markov categories provide a useful abstraction level for probability in type theory. Adding it to mathlib enables future work on categorical probability and statistics. In particular, I'm working on a probabilistic programming library and would like to write some proofs using these constructs. ## References - Fritz, T. (2020). [A synthetic approach to Markov kernels, conditional independence and theorems on sufficient statistics](https://arxiv.org/abs/1908.07021). *Advances in Mathematics*, 370, 107239. - Cho, K., & Jacobs, B. (2019). [Disintegration and Bayesian inversion via string diagrams](https://arxiv.org/abs/1709.00322). *Mathematical Structures in Computer Science*, 29(7), 938-971. --- All definitions include docstrings. The PR has tests for the core functionality. [![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 2414/7 Mathlib.lean,Mathlib/CategoryTheory/Bicategory/Monad/Basic.lean,Mathlib/CategoryTheory/CopyDiscardCategory/Basic.lean,Mathlib/CategoryTheory/CopyDiscardCategory/Deterministic.lean,Mathlib/CategoryTheory/MarkovCategory/Basic.lean,Mathlib/CategoryTheory/MarkovCategory/Cartesian.lean,Mathlib/CategoryTheory/MarkovCategory/FinStoch/Basic.lean,Mathlib/CategoryTheory/MarkovCategory/FinStoch/Braided.lean,Mathlib/CategoryTheory/MarkovCategory/FinStoch/CopyDiscard.lean,Mathlib/CategoryTheory/MarkovCategory/FinStoch/Markov.lean,Mathlib/CategoryTheory/MarkovCategory/FinStoch/Monoidal.lean,Mathlib/CategoryTheory/Monoidal/Bimon_.lean,Mathlib/CategoryTheory/Monoidal/CommComon_.lean,Mathlib/CategoryTheory/Monoidal/Comon_.lean,MathlibTest/CategoryTheory/MarkovCategory.lean,docs/references.bib 16 28 ['github-actions', 'jcreinhold', 'joelriou', 'mathlib4-merge-conflict-bot'] nobody
172-57805
5 months ago
177-63929
177 days ago
0-10638
2 hours
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
171-59716
5 months ago
227-57276
227 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
171-56725
5 months ago
252-56662
252 days ago
73-13048
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
168-72018
5 months ago
269-81418
269 days ago
0-47289
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
168-46807
5 months ago
168-46808
168 days ago
0-4775
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
168-46805
5 months ago
236-65299
236 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
168-46803
5 months ago
235-51000
235 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
168-46801
5 months ago
234-48798
234 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
168-46676
5 months ago
229-52539
229 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
168-46674
5 months ago
229-52888
229 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
168-46673
5 months ago
229-52542
229 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
168-46671
5 months ago
229-51802
229 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
168-46669
5 months ago
228-71430
228 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
168-46668
5 months ago
228-71950
228 days ago
0-507
8 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
168-14052
5 months ago
168-14052
168 days ago
48-73998
48 days
28452 plp127
author:plp127
 feat: Define `ZMod.fintype` without cases Define `ZMod.fintype` without casing on `n` except inside the proof. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) awaiting-author t-data 2/3 Mathlib/Data/ZMod/Defs.lean 1 2 ['github-actions', 'jcommelin'] pechersky
assignee:pechersky
168-13271
5 months ago
168-13271
168 days ago
46-561
46 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/) merge-conflict t-algebra awaiting-CI bench-after-CI
label:t-algebra$
 54/42 Mathlib/Algebra/Module/Submodule/Defs.lean 1 2 ['github-actions', 'mathlib4-merge-conflict-bot'] nobody
168-9841
5 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 bench-after-CI 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
168-9840
5 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
167-66209
5 months ago
262-73493
262 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
167-32576
5 months ago
221-78492
221 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
166-73073
5 months ago
258-77614
258 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
166-69434
5 months ago
258-78606
258 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
165-71321
5 months ago
unknown
0-0
0 seconds
27634 agjftucker
author:agjftucker
 fix(Analysis/Calculus/Implicit): consistently rename {`map`, `fun`, `function`} to `fun` There are several clear naming issues in the file Implicit.lean, such as ``` theorem prod_map_implicitFunction : ∀ᶠ p : F × G in 𝓝 (φ.prodFun φ.pt), φ.prodFun (φ.implicitFunction p.1 p.2) = p := ``` where `prod_map` and `prodFun` both refer to the same thing. In this PR I have done my best to resolve these as consistently as possible by renaming everything `map`, also everything `function`, to `fun`. This has the added benefit of making some long names a little shorter. In passing I rewrapped some comments and replaced `haveI` with `have` where it had been used like `haveI` in Lean 3. Moves: - ImplicitFunctionData -> ImplicitFunData - ImplicitFunctionData.implicitFunction -> ImplicitFunData.implicitFun - ImplicitFunctionData.prod_map_implicitFunction -> ImplicitFunData.prodFun_implicitFun - ImplicitFunctionData.left_map_implicitFunction -> ImplicitFunData.leftFun_implicitFun - ImplicitFunctionData.right_map_implicitFunction -> ImplicitFunData.rightFun_implicitFun - ImplicitFunctionData.implicitFunction_apply_image -> ImplicitFunData.implicitFun_apply_image - ImplicitFunctionData.implicitFunction_hasStrictFDerivAt -> ImplicitFunData.hasStrictFDerivAt_implicitFun - HasStrictFDerivAt.implicitFunctionDataOfComplemented -> HasStrictFDerivAt.implicitFunDataOfComplemented - HasStrictFDerivAt.implicitFunctionOfComplemented -> HasStrictFDerivAt.implicitFunOfComplemented - HasStrictFDerivAt.map_implicitFunctionOfComplemented_eq -> HasStrictFDerivAt.map_implicitFunOfComplemented_eq - HasStrictFDerivAt.eq_implicitFunctionOfComplemented -> HasStrictFDerivAt.eq_implicitFunOfComplemented - HasStrictFDerivAt.implicitFunctionOfComplemented_apply_image -> HasStrictFDerivAt.implicitFunOfComplemented_apply_image - HasStrictFDerivAt.to_implicitFunctionOfComplemented -> HasStrictFDerivAt.to_implicitFunOfComplemented - HasStrictFDerivAt.implicitFunction -> HasStrictFDerivAt.implicitFun - HasStrictFDerivAt.tendsto_implicitFunction -> HasStrictFDerivAt.tendsto_implicitFun - _root_.Filter.Tendsto.implicitFunction -> _root_.Filter.Tendsto.implicitFun - HasStrictFDerivAt.map_implicitFunction_eq -> HasStrictFDerivAt.map_implicitFun_eq - HasStrictFDerivAt.implicitFunction_apply_image -> HasStrictFDerivAt.implicitFun_apply_image - HasStrictFDerivAt.eq_implicitFunction -> HasStrictFDerivAt.eq_implicitFun - HasStrictFDerivAt.to_implicitFunction -> HasStrictFDerivAt.to_implicitFun --- - [ ] depends on: #26985 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict blocked-by-other-PR t-analysis 271/123 Mathlib/Analysis/Calculus/Implicit.lean,docs/1000.yaml,docs/overview.yaml,docs/undergrad.yaml 4 4 ['github-actions', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
165-68830
5 months ago
207-37323
207 days ago
23-28131
23 days
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
165-37945
5 months ago
217-52684
217 days ago
0-537
8 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
165-25269
5 months ago
168-4075
168 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
164-64747
5 months ago
166-74599
166 days ago
0-11345
3 hours
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
164-52548
5 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
163-51149
5 months ago
334-23522
334 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
163-37764
5 months ago
163-37764
163 days ago
46-26438
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
162-66872
5 months ago
163-61317
163 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
162-24349
5 months ago
252-10262
252 days ago
0-401
6 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
161-57400
5 months ago
239-33487
239 days ago
0-746
12 minutes
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
161-51445
5 months ago
162-24137
162 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
157-68821
5 months ago
215-85783
215 days ago
0-1600
26 minutes
29926 jcreinhold
author:jcreinhold
 feat(CategoryTheory/MarkovCategory): add basic finite stochastic matrices definitions to Markov category This PR introduces FinStoch, the category of finite stochastic matrices, as a concrete example of a Markov category. This PR builds on #29925, #29939, and #29919 and was split up from #29657. ## Main additions ### 1. Core definitions (`FinStoch/Basic.lean`) - `StochasticMatrix m n`: Matrices where rows sum to 1, representing conditional probabilities P(j|i) - `FinStoch`: The category with finite types as objects and stochastic matrices as morphisms - `DetMorphism`: Deterministic matrices (exactly one 1 per row) with their underlying functions - Composition: Matrix multiplication preserves row-stochasticity via the Chapman-Kolmogorov equation Key design choices: - Row-stochastic convention: entry (i,j) is P(output=j | input=i) - Deterministic morphisms tracked separately for structural isomorphisms ### 2. Monoidal structure (`FinStoch/Monoidal.lean`) Implements tensor products modeling independent parallel processes: - Tensor on objects: Cartesian product of finite types - Tensor on morphisms: Kronecker product P((j₁,j₂)|(i₁,i₂)) = P(j₁|i₁) × P(j₂|i₂) - Structural morphisms: Associator, unitors use deterministic permutations - Coherence**: Pentagon and triangle identities verified computationally ## Mathematical significance FinStoch provides the canonical example of a Markov category: - Morphisms: Stochastic matrices/Markov chains - Composition: Chapman-Kolmogorov equation for multi-step transitions - Tensor: Independent parallel processes This models finite probability spaces categorically, where: - Objects represent sample spaces - Morphisms represent probabilistic transitions - Tensor products model independence ## References Fritz (2020) - [ ] depends on: #29925 merge-conflict t-category-theory new-contributor 1437/0 Mathlib.lean,Mathlib/CategoryTheory/CopyDiscardCategory/Basic.lean,Mathlib/CategoryTheory/CopyDiscardCategory/Deterministic.lean,Mathlib/CategoryTheory/MarkovCategory/Basic.lean,Mathlib/CategoryTheory/MarkovCategory/Cartesian.lean,Mathlib/CategoryTheory/MarkovCategory/FinStoch/Basic.lean,Mathlib/CategoryTheory/MarkovCategory/FinStoch/Monoidal.lean,MathlibTest/CategoryTheory/MarkovCategory.lean,docs/references.bib 9 4 ['github-actions', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
157-48219
5 months ago
unknown
0-0
0 seconds
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
157-47069
5 months ago
547-74618
547 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
157-39076
5 months ago
unknown
0-0
0 seconds
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'] nobody
157-27977
5 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
157-21181
5 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
156-51558
5 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
156-47039
5 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
156-27918
5 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
155-63947
5 months ago
156-4760
156 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
155-53280
5 months ago
155-53281
155 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
155-50018
5 months ago
165-37948
165 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
152-54856
5 months ago
251-29230
251 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
152-4812
5 months ago
152-4812
152 days ago
6-6533
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
151-86288
5 months ago
203-31685
203 days ago
0-1
1 second
29432 lecopivo
author:lecopivo
 feat: `data_synth` tactic to prove `HasFDerivAt 𝕜 f ?f' x` and similar New tactic `data_synth` that can prove proposition with holes e.g. figure out what `?f'` is and prove `HasFDerivAt 𝕜 f ?f' x` --- Tactic `data_synth` is designed to synthesize some data that satisfies some proposition. The canonical example is `HasFDerivAt 𝕜 f ?f' x`, this tactic will figure out `f'` and provide proof of `HasFDerivAt 𝕜 f f' x`. Another examples: `HasBoundinbBall s ?center ?radius` or `IsPolynomial f ?p` ``` def HasBoundingBall (s : Set α) (center : α) (radius : ℝ) : Prop := s ⊆ Metric.closedBall center radius def IsPolynomial (f : R → R) (p : Polynomial R) := f = p.eval ``` WIP t-meta 1932/0 Mathlib/Tactic/DataSynth.lean,Mathlib/Tactic/DataSynth/Attr.lean,Mathlib/Tactic/DataSynth/Core.lean,Mathlib/Tactic/DataSynth/Decl.lean,Mathlib/Tactic/DataSynth/Elab.lean,Mathlib/Tactic/DataSynth/FDeriv.lean,Mathlib/Tactic/DataSynth/FDeriv/Basic.lean,Mathlib/Tactic/DataSynth/FDeriv/Dispatch.lean,Mathlib/Tactic/DataSynth/FDeriv/Init.lean,Mathlib/Tactic/DataSynth/FDeriv/Simproc.lean,Mathlib/Tactic/DataSynth/Tests/BoundingBall.lean,Mathlib/Tactic/DataSynth/Tests/Compilation.lean,Mathlib/Tactic/DataSynth/Tests/FDeriv.lean,Mathlib/Tactic/DataSynth/Tests/FDerivInit.lean,Mathlib/Tactic/DataSynth/Tests/FwdDeriv.lean,Mathlib/Tactic/DataSynth/Tests/Normalize.lean,Mathlib/Tactic/DataSynth/Tests/Polynomial.lean,Mathlib/Tactic/DataSynth/Theorems.lean,Mathlib/Tactic/DataSynth/ToBatteries.lean,Mathlib/Tactic/DataSynth/Types.lean 20 3 ['JovanGerb', 'github-actions', 'lecopivo'] nobody
151-51206
5 months ago
189-71598
189 days ago
0-1834
30 minutes
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
151-38437
5 months ago
172-70527
172 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
149-80059
4 months ago
468-58555
468 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
149-73844
4 months ago
205-22289
205 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
149-2023
4 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
149-2022
4 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
148-48233
4 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
148-48232
4 months ago
unknown
0-0
0 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
147-57319
4 months ago
147-57319
147 days ago
8-8414
8 days
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
146-28613
4 months ago
146-28613
146 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
146-20851
4 months ago
146-20851
146 days ago
148-3338
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
145-53087
4 months ago
243-65069
243 days ago
0-89
1 minute
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
145-46640
4 months ago
243-73113
243 days ago
0-79
1 minute
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
145-10701
4 months ago
309-78222
309 days ago
0-47835
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
144-48390
4 months ago
227-52897
227 days ago
0-5675
1 hour
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
144-44283
4 months ago
144-44351
144 days ago
0-83
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
144-39773
4 months ago
192-39404
192 days ago
0-77704
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
141-74355
4 months ago
215-40180
215 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
139-76770
4 months ago
203-36943
203 days ago
2-31233
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
139-76722
4 months ago
155-51398
155 days ago
47-58551
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
139-68452
4 months ago
160-51081
160 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
139-68450
4 months ago
160-48950
160 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
139-47618
4 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
138-54292
4 months ago
223-70277
223 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
137-12887
4 months ago
181-39540
181 days ago
78-30158
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
136-71290
4 months ago
271-62092
271 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
136-60026
4 months ago
215-75561
215 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
136-56527
4 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
136-55830
4 months ago
145-28982
145 days ago
0-5460
1 hour
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
135-55780
4 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
133-67973
4 months ago
133-67973
133 days ago
41-53612
41 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/) awaiting-author t-topology 368/1 Mathlib/Order/Lattice.lean,Mathlib/Topology/CWComplex/Classical/Subcomplex.lean 2 19 ['ADedecker', 'github-actions', 'scholzhannah'] nobody
133-56954
4 months ago
133-56954
133 days ago
6-69092
6 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
133-55550
4 months ago
209-78446
209 days ago
47-20776
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
133-37951
4 months ago
180-13453
180 days ago
15-4939
15 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
133-34048
4 months ago
183-64398
183 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
133-1103
4 months ago
133-1103
133 days ago
31-69826
31 days
27516 gaetanserre
author:gaetanserre
 feat: add rational approximation lemma for suprema in `unitInterval` Add `sSup_eq_iUnion_rat` lemma that provides a rational approximation characterization of suprema in the unit interval. For monotone functions `f : α → I → ℝ`, the lemma establishes that the set of pairs where `a < sSup {x | f e.1 x < e.2}` equals the union over all rationals `q ∈ I` with `q > a` of the sets `{e | f e.1 q < e.2}`. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) awaiting-author t-topology 44/0 Mathlib/MeasureTheory/Constructions/UnitInterval.lean,Mathlib/Topology/UnitInterval.lean 2 9 ['gaetanserre', 'github-actions', 'j-loreaux', 'mathlib4-merge-conflict-bot', 'ocfnash'] j-loreaux
assignee:j-loreaux
132-55457
4 months ago
132-55932
132 days ago
94-82093
94 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
132-29878
4 months ago
132-29879
132 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
132-17590
4 months ago
210-28136
210 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
131-84001
4 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
130-49682
4 months ago
171-82043
171 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
130-47771
4 months ago
251-49141
251 days ago
0-267
4 minutes
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
130-34531
4 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
130-33299
4 months ago
139-47778
139 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
130-19453
4 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
127-49109
4 months ago
208-41835
208 days ago
17-16247
17 days
14752 AntoineChambert-Loir
author:AntoineChambert-Loir
 fix(Topology/Algebra/Valued): repair definition of Valued Following a [discussion on Zulip](https://leanprover.zulipchat.com/#narrow/stream/116395-maths/topic/Question.20about.20.60Valued.2Eis_topological_valuation.60), we modify the definition of the field `is_topological_valuation` of `Valued` insisting that the element $\gamma$ showing up there is in the subgroup generated by the image of the valuation map. Co-authored-by: @faenuccio - [x] depends on: #25496 merge-conflict WIP t-topology t-algebra
label:t-algebra$
 1166/301 Mathlib.lean,Mathlib/Algebra/GroupWithZero/Range.lean,Mathlib/NumberTheory/NumberField/FinitePlaces.lean,Mathlib/RingTheory/LaurentSeries.lean,Mathlib/RingTheory/Valuation/Basic.lean,Mathlib/RingTheory/Valuation/RankOne.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/UniformSpace/AbstractCompletion.lean,docs/references.bib 12 28 ['AntoineChambert-Loir', 'faenuccio', 'github-actions', 'jcommelin', 'kbuzzard', 'leanprover-community-bot-assistant', 'mathlib4-dependent-issues-bot', 'riccardobrasca'] nobody
126-36550
4 months ago
284-47431
284 days ago
1-33784
1 day
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
124-58482
4 months ago
124-58482
124 days ago
122-67006
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
124-10762
4 months ago
163-75828
163 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
123-39907
4 months ago
245-54504
245 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
122-70028
4 months ago
276-56308
276 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
122-51461
4 months ago
140-44280
140 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
121-39799
4 months ago
144-51276
144 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
120-10227
4 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
120-3877
4 months ago
122-59537
122 days ago
0-85235
23 hours
31596 grunweg
author:grunweg
 chore: remove extraneous uses of push_neg --- Ideally, repeat this experiment after the new `contrapose!` for equivalences has been merged... [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict WIP 155/99 Mathlib/Algebra/Group/Fin/Basic.lean,Mathlib/Algebra/Group/Pointwise/Finset/Basic.lean,Mathlib/Algebra/Group/Pointwise/Set/Basic.lean,Mathlib/Algebra/Group/UniqueProds/Basic.lean,Mathlib/Algebra/Homology/Embedding/Basic.lean,Mathlib/Algebra/Order/Archimedean/Class.lean,Mathlib/AlgebraicTopology/SimplicialSet/Degenerate.lean,Mathlib/Analysis/SpecialFunctions/BinaryEntropy.lean,Mathlib/CategoryTheory/Limits/Shapes/Preorder/WellOrderContinuous.lean,Mathlib/Combinatorics/Colex.lean,Mathlib/Combinatorics/SimpleGraph/Clique.lean,Mathlib/Combinatorics/SimpleGraph/Metric.lean,Mathlib/Data/EReal/Operations.lean,Mathlib/Data/Nat/Count.lean,Mathlib/Data/Seq/Basic.lean,Mathlib/GroupTheory/Perm/ClosureSwap.lean,Mathlib/GroupTheory/Perm/Cycle/Basic.lean,Mathlib/LinearAlgebra/LinearIndependent/Defs.lean,Mathlib/LinearAlgebra/RootSystem/GeckConstruction/Semisimple.lean,Mathlib/ModelTheory/Semantics.lean,Mathlib/NumberTheory/Padics/PadicVal/Basic.lean,Mathlib/NumberTheory/WellApproximable.lean,Mathlib/Order/LiminfLimsup.lean,Mathlib/RingTheory/HahnSeries/Basic.lean,Mathlib/RingTheory/HahnSeries/Multiplication.lean,Mathlib/RingTheory/Ideal/AssociatedPrime/Basic.lean,Mathlib/RingTheory/Ideal/Oka.lean,Mathlib/RingTheory/Localization/AtPrime/Basic.lean,Mathlib/RingTheory/Valuation/ValuativeRel/Basic.lean,Mathlib/SetTheory/Ordinal/Principal.lean,Mathlib/Tactic/ByCases.lean,Mathlib/Tactic/ByContra.lean,Mathlib/Tactic/Contrapose.lean,Mathlib/Tactic/NormNum/Core.lean,Mathlib/Tactic/Push.lean,Mathlib/Topology/LocallyFinsupp.lean,Mathlib/Topology/Maps/Basic.lean,Mathlib/Topology/Separation/Regular.lean,Mathlib/Util/AtLocation.lean,MathlibTest/Contrapose.lean,MathlibTest/byContra.lean,MathlibTest/push_neg.lean 42 2 ['github-actions', 'mathlib4-merge-conflict-bot'] nobody
119-82567
3 months ago
123-52458
123 days ago
0-1
1 second
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
119-43023
3 months ago
119-42560
119 days ago
131-51649
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
119-27894
3 months ago
538-55282
538 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
119-10868
3 months ago
706-55434
706 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
118-61640
3 months ago
621-69632
621 days ago
168-78821
168 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/) large-import merge-conflict file-removed awaiting-author t-meta 210277/112616 .github/PULL_REQUEST_TEMPLATE.md,.github/actionlint.yml,.github/build.in.yml,.github/workflows/PR_summary.yml,.github/workflows/actionlint.yml,.github/workflows/add_label_from_diff.yaml,.github/workflows/auto_assign_reviewers.yaml,.github/workflows/bench_summary_comment.yml,.github/workflows/bors.yml,.github/workflows/bot_fix_style.yaml,.github/workflows/build.yml,.github/workflows/build_fork.yml,.github/workflows/daily.yml,.github/workflows/discover-lean-pr-testing.yml,.github/workflows/docker_build.yml,.github/workflows/label_new_contributor.yml,.github/workflows/latest_import.yml,.github/workflows/lint_and_suggest_pr.yml,.github/workflows/long_file_report.yml,.github/workflows/maintainer_bors.yml,.github/workflows/maintainer_bors_wf_run.yml,.github/workflows/maintainer_merge.yml,.github/workflows/maintainer_merge_wf_run.yml,.github/workflows/mk_build_yml.sh,.github/workflows/nightly-docgen.yml,.github/workflows/nightly-regression-report.yml,.github/workflows/nightly_bump_toolchain.yml,.github/workflows/nightly_detect_failure.yml,.github/workflows/nightly_merge_master.yml,.github/workflows/nolints.yml,.github/workflows/pre-commit.yml,.github/workflows/remove_deprecated_decls.yml,.github/workflows/stale.yml,.github/workflows/technical_debt_metrics.yml,.github/workflows/update_dependencies.yml,.github/workflows/update_dependencies_zulip.yml,.github/workflows/weekly-lints.yml,.github/workflows/zulip_emoji_closed_pr.yaml,.github/workflows/zulip_emoji_labelling.yaml,.github/workflows/zulip_emoji_merge_delegate.yaml,.pre-commit-config.yaml,Archive.lean,Archive/Arithcc.lean,Archive/Examples/Eisenstein.lean,Archive/Examples/IfNormalization/Result.lean,Archive/Examples/IfNormalization/Statement.lean,Archive/Examples/IfNormalization/WithoutAesop.lean,Archive/Examples/Kuratowski.lean,Archive/Examples/MersennePrimes.lean,Archive/Imo/Imo1959Q2.lean,Archive/Imo/Imo1960Q1.lean,Archive/Imo/Imo1961Q3.lean,Archive/Imo/Imo1962Q1.lean,Archive/Imo/Imo1962Q4.lean,Archive/Imo/Imo1972Q5.lean,Archive/Imo/Imo1975Q1.lean,Archive/Imo/Imo1981Q3.lean,Archive/Imo/Imo1982Q1.lean,Archive/Imo/Imo1982Q3.lean,Archive/Imo/Imo1987Q1.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/Imo2005Q3.lean,Archive/Imo/Imo2005Q4.lean,Archive/Imo/Imo2006Q3.lean,Archive/Imo/Imo2008Q2.lean,Archive/Imo/Imo2008Q4.lean,Archive/Imo/Imo2011Q3.lean,Archive/Imo/Imo2013Q1.lean,Archive/Imo/Imo2013Q5.lean,Archive/Imo/Imo2015Q6.lean,Archive/Imo/Imo2019Q2.lean,Archive/Imo/Imo2021Q1.lean,Archive/Imo/Imo2024Q1.lean,Archive/Imo/Imo2024Q3.lean,Archive/Imo/Imo2024Q5.lean,Archive/Imo/Imo2024Q6.lean,Archive/Imo/README.md,Archive/Kuratowski.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/HeronsFormula.lean,Archive/Wiedijk100Theorems/InverseTriangleSum.lean,Archive/Wiedijk100Theorems/Partition.lean,Archive/Wiedijk100Theorems/PerfectNumbers.lean,Archive/Wiedijk100Theorems/SolutionOfCubicQuartic.lean,Archive/Wiedijk100Theorems/SumOfPrimeReciprocalsDiverges.lean,Cache/IO.lean,Cache/Main.lean 5782 14 ['Paul-Lez', 'Vierkantor', 'eric-wieser', 'github-actions', 'kmill', 'mathlib4-merge-conflict-bot'] nobody
118-44707
3 months ago
235-61814
235 days ago
0-5960
1 hour
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
118-44135
3 months ago
464-7665
464 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
117-81995
3 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
117-81994
3 months ago
933-18456
933 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
117-81993
3 months ago
977-61654
977 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
117-81992
3 months ago
801-20487
801 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
117-81989
3 months ago
621-69620
621 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
117-81988
3 months ago
874-81764
874 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
117-81864
3 months ago
755-60313
755 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
117-81863
3 months ago
787-78034
787 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
117-81859
3 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
117-81858
3 months ago
566-57493
566 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
117-81857
3 months ago
648-50385
648 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
117-81733
3 months ago
580-29839
580 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
117-81732
3 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
117-81730
3 months ago
648-67108
648 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
117-81728
3 months ago
567-73814
567 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
117-81726
3 months ago
538-56862
538 days ago
26-40037
26 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
117-81603
3 months ago
609-47157
609 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
117-81601
3 months ago
607-29202
607 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
117-81599
3 months ago
604-41063
604 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
117-81598
3 months ago
593-66940
593 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
117-81597
3 months ago
593-47828
593 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
117-81595
3 months ago
579-73485
579 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
117-81593
3 months ago
436-30686
436 days ago
78-5771
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
117-81443
3 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
117-81442
3 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
117-81441
3 months ago
496-46844
496 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
117-81439
3 months ago
420-43999
420 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
117-81437
3 months ago
490-52771
490 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
117-81436
3 months ago
437-61666
437 days ago
43-17770
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
117-81435
3 months ago
429-52406
429 days ago
49-5112
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
117-81434
3 months ago
476-72610
476 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
117-81307
3 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
117-81306
3 months ago
452-18127
452 days ago
0-334
5 minutes
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
117-81304
3 months ago
413-55088
413 days ago
23-30991
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
117-81303
3 months ago
315-27832
315 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
117-81301
3 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
117-81300
3 months ago
405-54988
405 days ago
7-42229
7 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
117-81299
3 months ago
387-14658
387 days ago
27-38491
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
117-81297
3 months ago
418-49858
418 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
117-81295
3 months ago
336-83108
336 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
117-81293
3 months ago
410-31271
410 days ago
0-668
11 minutes
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
117-81289
3 months ago
343-9131
343 days ago
54-54882
54 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
117-81287
3 months ago
349-75962
349 days ago
46-53123
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
117-81163
3 months ago
344-65118
344 days ago
50-8745
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
117-81157
3 months ago
364-75170
364 days ago
20-81771
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
117-81154
3 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
117-81153
3 months ago
196-64434
196 days ago
158-38024
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
117-81151
3 months ago
386-11317
386 days ago
0-141
2 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
117-81150
3 months ago
386-11045
386 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
117-81148
3 months ago
384-28750
384 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
117-81144
3 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
117-81142
3 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
117-81141
3 months ago
117-81142
117 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
117-81135
3 months ago
340-63649
340 days ago
28-59574
28 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
117-81133
3 months ago
346-59281
346 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
117-81131
3 months ago
292-8002
292 days ago
71-48538
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
117-81130
3 months ago
193-18537
193 days ago
0-4401
1 hour
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
117-81124
3 months ago
357-26855
357 days ago
0-21
21 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
117-81122
3 months ago
200-43494
200 days ago
65-54983
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
117-81120
3 months ago
336-35673
336 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
117-81119
3 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
117-81117
3 months ago
219-5582
219 days ago
124-78303
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
117-80983
3 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
117-80982
3 months ago
203-79563
203 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
117-80977
3 months ago
284-12721
284 days ago
0-20349
5 hours
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
117-80972
3 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
117-80969
3 months ago
117-80970
117 days ago
177-42245
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
117-80964
3 months ago
168-14835
168 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
117-80837
3 months ago
281-65634
281 days ago
0-820
13 minutes
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
117-80834
3 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
117-80833
3 months ago
260-17996
260 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
117-80831
3 months ago
277-80084
277 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
117-80830
3 months ago
277-79723
277 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
117-80828
3 months ago
277-78815
277 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
117-80826
3 months ago
277-78920
277 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
117-80825
3 months ago
277-78566
277 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
117-80823
3 months ago
277-78377
277 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
117-80812
3 months ago
276-73458
276 days ago
0-410
6 minutes
25974 scholzhannah
author:scholzhannah
 feat(Topology/Compactness/CompactlyCoherentSpace): compact coherentification (k-ification) This PR defines the notion of turning an arbitrary topological space into a compactly coherent space. Compactly coherent spaces are commonly referred to as "compactly generated spaces" or "k-spaces" in the literature while the operation of turning a space into such as space is called the "k-ification". There are however three different notions that are described with this name. To disambiguate we use the names "compactly coherent space" and "compactcoherentification" here. See [this wikipedia page](https://en.wikipedia.org/wiki/Compactly_generated_space) for an explanation of these notions. This PR continues the work from #25318. Original PR: https://github.com/leanprover-community/mathlib4/pull/25318 Co-authored-by: Floris van Doorn merge-conflict t-topology large-import 174/5 Mathlib/Topology/Compactness/CompactlyCoherentSpace.lean 1 5 ['github-actions', 'joelriou', 'mathlib4-merge-conflict-bot', 'scholzhannah'] ADedecker
assignee:ADedecker
117-80801
3 months ago
117-80802
117 days ago
147-64645
147 days
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
117-80800
3 months ago
273-28082
273 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
117-80797
3 months ago
273-28070
273 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 `variation μ = μ`. Co-authored-by: @yoh-tanimoto - [ ] depends on: #26160 --- [![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-measure-probability 467/0 Mathlib.lean,Mathlib/MeasureTheory/VectorMeasure/Variation/Defs.lean,Mathlib/MeasureTheory/VectorMeasure/Variation/Lemmas.lean 3 3 ['github-actions', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
117-80644
3 months ago
254-75599
254 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
117-80622
3 months ago
266-66852
266 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 merge-conflict awaiting-author t-analysis 468/0 Mathlib.lean,Mathlib/Analysis/Calculus/FDeriv/Partial.lean,Mathlib/Analysis/Normed/Operator/BoundedLinearMaps.lean 3 21 ['YaelDillies', 'agjftucker', 'github-actions', 'igorkhavkine', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot', 'sgouezel'] sgouezel
assignee:sgouezel
117-80621
3 months ago
214-42611
214 days ago
44-77065
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
117-80617
3 months ago
265-77526
265 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
117-80604
3 months ago
139-70069
139 days ago
87-77407
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
117-80603
3 months ago
264-73745
264 days ago
0-1050
17 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
117-80602
3 months ago
263-70777
263 days ago
0-433
7 minutes
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
117-80473
3 months ago
233-37831
233 days ago
25-5689
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
117-80471
3 months ago
204-45334
204 days ago
40-48238
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
117-80470
3 months ago
253-82505
253 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
117-80468
3 months ago
146-69278
146 days ago
62-14616
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
117-80447
3 months ago
117-80448
117 days ago
133-24576
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
117-80446
3 months ago
250-82820
250 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
117-80436
3 months ago
248-68998
248 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
117-80433
3 months ago
229-36703
229 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
117-80431
3 months ago
244-68040
244 days ago
0-287
4 minutes
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
117-80430
3 months ago
119-25821
119 days ago
84-39534
84 days
27187 Komyyy
author:Komyyy
 feat: `NONote` represents ordinals < ε₀ --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict WIP t-set-theory 186/12 Mathlib/SetTheory/Ordinal/Notation.lean 1 3 ['github-actions', 'mathlib4-merge-conflict-bot', 'vihdzp'] nobody
117-80429
3 months ago
244-10889
244 days ago
0-2
2 seconds
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
117-80428
3 months ago
174-72992
174 days ago
3-71064
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
117-80297
3 months ago
223-70496
223 days ago
15-68804
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
117-80295
3 months ago
193-58582
193 days ago
18-86133
18 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
117-80276
3 months ago
228-51439
228 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
117-80275
3 months ago
132-41204
132 days ago
81-63204
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
117-80274
3 months ago
227-26101
227 days ago
0-5814
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
117-80148
3 months ago
172-5106
172 days ago
37-65699
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
117-80143
3 months ago
187-71374
187 days ago
23-24068
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
117-80142
3 months ago
117-80143
117 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
117-80136
3 months ago
197-24042
197 days ago
18-54732
18 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
117-80135
3 months ago
122-44018
122 days ago
93-44257
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
117-80132
3 months ago
124-71472
124 days ago
58-24605
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
117-80128
3 months ago
212-33956
212 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
117-79990
3 months ago
140-56573
140 days ago
0-7250
2 hours
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
117-79989
3 months ago
117-79990
117 days ago
71-37436
71 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
117-79982
3 months ago
195-45479
195 days ago
4-9284
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
117-79957
3 months ago
188-21873
188 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
117-79951
3 months ago
117-79952
117 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 4 ['github-actions', 'mathlib4-merge-conflict-bot', 'yury-harmonic'] nobody
117-79380
3 months ago
182-57113
182 days ago
0-93
1 minute
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
117-79373
3 months ago
181-58504
181 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
117-79359
3 months ago
175-32225
175 days ago
0-8980
2 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
117-79355
3 months ago
117-79356
117 days ago
54-85998
54 days
30004 luigi-massacci
author:luigi-massacci
 feat(MeasureTheory/Integral/TestAgainst): integrating BCFs against a finite measure or an L1Loc map as CLMs This PR merges #29511 and #29748. Create a new file `TestAgainst.lean` with definitions wrapping integration against a finite measure or a locally integrable map as continuous linear maps on bounded continuous functions. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict awaiting-author t-analysis t-measure-probability 112/1 Mathlib.lean,Mathlib/MeasureTheory/Integral/BoundedContinuousFunction.lean,Mathlib/MeasureTheory/Integral/TestAgainst.lean 3 48 ['EtienneC30', 'github-actions', 'j-loreaux', 'luigi-massacci', 'mathlib4-merge-conflict-bot'] EtienneC30
assignee:EtienneC30
117-79342
3 months ago
138-76041
138 days ago
31-57009
31 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
117-79341
3 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
117-79336
3 months ago
125-52733
125 days ago
23-51802
23 days
30230 CoolRmal
author:CoolRmal
 feat(MeasureTheory): Basic properties of the integral against a vector measure with a bilinear form. Create a folder named Integral in the folder about vector measures. Define the integral of a function against a vector measure with a bilinear form, and prove that integral is a linear operator on functions, bilinear forms, and vector measures, respectively. Several useful lemmas are added into the file about variations of a vector measure (e.g. triangle inequality). --- - [ ] depends on: #28499 [![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-measure-probability 1353/0 Mathlib.lean,Mathlib/MeasureTheory/VectorMeasure/Basic.lean,Mathlib/MeasureTheory/VectorMeasure/Integral/Basic.lean,Mathlib/MeasureTheory/VectorMeasure/Integral/L1.lean,Mathlib/MeasureTheory/VectorMeasure/Variation/Defs.lean,Mathlib/MeasureTheory/VectorMeasure/Variation/Lemmas.lean 6 3 ['github-actions', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
117-79186
3 months ago
unknown
0-0
0 seconds
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
117-79178
3 months ago
140-56618
140 days ago
15-62894
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. - [ ] depends on: #31506 - [ ] 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
117-79159
3 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
117-79154
3 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
117-78846
3 months ago
139-20464
139 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
117-78646
3 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
117-78420
3 months ago
129-75188
129 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
117-76187
3 months ago
561-69301
561 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
117-74376
3 months ago
117-74377
117 days ago
11-62509
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
117-74080
3 months ago
123-28996
123 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
117-74037
3 months ago
120-3956
120 days ago
0-537
8 minutes
21915 YaelDillies
author:YaelDillies
 feat: simproc for `Int.divisorsAntidiag` Co-authored-by: Paul Lezeau --- - [x] depends on: #21912 - [x] depends on: #21991 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) WIP t-meta 75/0 Mathlib.lean,Mathlib/Tactic.lean,Mathlib/Tactic/Simproc/DivisorsAntidiag.lean 3 9 ['YaelDillies', 'eric-wieser', 'github-actions', 'leanprover-community-bot-assistant', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
117-68120
3 months ago
394-50101
394 days ago
0-56
56 seconds
15443 YaelDillies
author:YaelDillies
 feat: Marcinkiewicz-Zygmund inequality Prove the Marcinkiewicz-Zygmund inequality. The Marcinkiewicz-Zygmund inequality states that, if `X₁, ..., Xₐ ∈ L^p` are independent random variables of mean zero valued in some inner product space, then the `L^p`-norm of `X₁ + ... + Xₐ` is at most `Cₚ` times the `L^(p/2)`-norm of `|X₁|² + ... + |Xₐ|²`, where `Cₚ` is a constant depending on `p` alone. From LeanAPAP Co-authored-by: Bhavik Mehta --- - [x] depends on: #15832 - [x] depends on: #21033 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) WIP t-analysis 189/0 Mathlib.lean,Mathlib/Probability/MarcinkiewiczZygmund.lean 2 40 ['Parcly-Taxel', 'YaelDillies', 'b-mehta', 'github-actions', 'hrmacbeth', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot', 'sgouezel'] nobody
117-67776
3 months ago
441-46683
441 days ago
89-28229
89 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
label:t-algebra$
 1/0 Mathlib/Algebra/Group/Commutator.lean 1 2 ['github-actions', 'grunweg'] nobody
117-54062
3 months ago
123-60513
123 days ago
0-1762
29 minutes
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 760/625 Archive/Imo/Imo1988Q6.lean,Archive/Imo/Imo1997Q3.lean,Archive/Imo/Imo2024Q5.lean,Archive/MiuLanguage/Basic.lean,Archive/Wiedijk100Theorems/BallotProblem.lean,Cache/Requests.lean,Counterexamples/PolynomialIsDomain.lean,Mathlib.lean,Mathlib/Algebra/Algebra/NonUnitalSubalgebra.lean,Mathlib/Algebra/Algebra/Subalgebra/Basic.lean,Mathlib/Algebra/Algebra/Subalgebra/Lattice.lean,Mathlib/Algebra/BigOperators/Fin.lean,Mathlib/Algebra/BigOperators/Ring/Finset.lean,Mathlib/Algebra/Category/Ring/Constructions.lean,Mathlib/Algebra/CharP/Subring.lean,Mathlib/Algebra/ContinuedFractions/Computation/Approximations.lean,Mathlib/Algebra/ContinuedFractions/ConvergentsEquiv.lean,Mathlib/Algebra/DirectSum/Internal.lean,Mathlib/Algebra/Group/Fin/Basic.lean,Mathlib/Algebra/Group/Int/Even.lean,Mathlib/Algebra/Group/Submonoid/Membership.lean,Mathlib/Algebra/Group/Submonoid/Operations.lean,Mathlib/Algebra/Group/Subsemigroup/Operations.lean,Mathlib/Algebra/Homology/Augment.lean,Mathlib/Algebra/Homology/Embedding/Connect.lean,Mathlib/Algebra/Lie/LieTheorem.lean,Mathlib/Algebra/Lie/Nilpotent.lean,Mathlib/Algebra/Lie/Weights/Chain.lean,Mathlib/Algebra/Lie/Weights/RootSystem.lean,Mathlib/Algebra/Module/Submodule/Map.lean,Mathlib/Algebra/Module/ZLattice/Basic.lean,Mathlib/Algebra/Order/Archimedean/Basic.lean,Mathlib/Algebra/Order/CauSeq/Basic.lean,Mathlib/Algebra/Order/Field/Power.lean,Mathlib/Algebra/Order/Group/Unbundled/Int.lean,Mathlib/Algebra/Order/Module/HahnEmbedding.lean,Mathlib/Algebra/Order/Ring/Unbundled/Rat.lean,Mathlib/Algebra/Polynomial/CoeffList.lean,Mathlib/Algebra/Polynomial/Degree/CardPowDegree.lean,Mathlib/Algebra/Polynomial/Degree/IsMonicOfDegree.lean,Mathlib/Algebra/Polynomial/Derivative.lean,Mathlib/Algebra/Polynomial/Div.lean,Mathlib/Algebra/Polynomial/Factors.lean,Mathlib/Algebra/Polynomial/Homogenize.lean,Mathlib/Algebra/Polynomial/Laurent.lean,Mathlib/Algebra/Polynomial/RingDivision.lean,Mathlib/Algebra/Polynomial/SumIteratedDerivative.lean,Mathlib/Algebra/Ring/Action/Invariant.lean,Mathlib/Algebra/Ring/Ext.lean,Mathlib/Algebra/Ring/Periodic.lean,Mathlib/Algebra/Ring/Subsemiring/Defs.lean,Mathlib/Algebra/Star/Module.lean,Mathlib/Algebra/Star/NonUnitalSubalgebra.lean,Mathlib/Algebra/Star/Subalgebra.lean,Mathlib/AlgebraicGeometry/Modules/Tilde.lean,Mathlib/AlgebraicGeometry/SpreadingOut.lean,Mathlib/AlgebraicGeometry/StructureSheaf.lean,Mathlib/AlgebraicTopology/DoldKan/Degeneracies.lean,Mathlib/AlgebraicTopology/DoldKan/Faces.lean,Mathlib/AlgebraicTopology/Quasicategory/Basic.lean,Mathlib/AlgebraicTopology/SimplexCategory/Basic.lean,Mathlib/AlgebraicTopology/SimplicialSet/Horn.lean,Mathlib/Analysis/Asymptotics/Theta.lean,Mathlib/Analysis/Calculus/ContDiff/FaaDiBruno.lean,Mathlib/Analysis/Complex/UpperHalfPlane/Basic.lean,Mathlib/Analysis/Convex/Between.lean,Mathlib/Analysis/Convex/SpecificFunctions/Deriv.lean,Mathlib/Analysis/Convex/StdSimplex.lean,Mathlib/Analysis/Distribution/TemperateGrowth.lean,Mathlib/Analysis/InnerProductSpace/Projection/Basic.lean,Mathlib/Analysis/Matrix/Spectrum.lean,Mathlib/Analysis/Meromorphic/Basic.lean,Mathlib/Analysis/Normed/Affine/Simplex.lean,Mathlib/Analysis/Normed/Field/UnitBall.lean,Mathlib/Analysis/Normed/Group/SemiNormedGrp/Kernels.lean,Mathlib/Analysis/Normed/Module/Ball/RadialEquiv.lean,Mathlib/Analysis/Normed/Ring/Ultra.lean,Mathlib/Analysis/NormedSpace/MStructure.lean,Mathlib/Analysis/SpecialFunctions/Gamma/Beta.lean,Mathlib/Analysis/SpecialFunctions/Log/Basic.lean,Mathlib/Analysis/SpecialFunctions/Pow/NNReal.lean,Mathlib/Analysis/SpecialFunctions/Pow/Real.lean,Mathlib/CategoryTheory/ConcreteCategory/UnbundledHom.lean,Mathlib/CategoryTheory/Groupoid/Subgroupoid.lean,Mathlib/Combinatorics/Additive/AP/Three/Defs.lean,Mathlib/Combinatorics/Additive/FreimanHom.lean,Mathlib/Combinatorics/Quiver/Arborescence.lean,Mathlib/Combinatorics/Schnirelmann.lean,Mathlib/Combinatorics/SimpleGraph/Extremal/Turan.lean,Mathlib/Combinatorics/SimpleGraph/FiveWheelLike.lean,Mathlib/Combinatorics/SimpleGraph/Hamiltonian.lean,Mathlib/Combinatorics/SimpleGraph/Trails.lean,Mathlib/Computability/Primrec.lean,Mathlib/Control/Random.lean,Mathlib/Data/Char.lean,Mathlib/Data/ENNReal/Basic.lean,Mathlib/Data/ENNReal/Inv.lean,Mathlib/Data/FP/Basic.lean,Mathlib/Data/Fin/Basic.lean,Mathlib/Data/Fin/SuccPred.lean 297 5 ['JovanGerb', 'github-actions', 'leanprover-bot', 'mathlib4-merge-conflict-bot'] nobody
117-53988
3 months ago
123-66219
123 days ago
0-88
1 minute
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
117-53969
3 months ago
277-69133
277 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
117-53313
3 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
117-53305
3 months ago
930-22018
930 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
117-53300
3 months ago
787-58053
787 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
117-53268
3 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
117-53253
3 months ago
801-58231
801 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
117-53247
3 months ago
714-45553
714 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
117-53241
3 months ago
621-76050
621 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
117-53234
3 months ago
621-76033
621 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
117-53211
3 months ago
768-21955
768 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
117-53203
3 months ago
747-20648
747 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
117-53169
3 months ago
592-73451
592 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
117-53162
3 months ago
592-73326
592 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
117-53147
3 months ago
603-19294
603 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
117-53142
3 months ago
679-61193
679 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
117-53138
3 months ago
689-49418
689 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
117-53109
3 months ago
620-32590
620 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
117-53098
3 months ago
612-39105
612 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
117-53063
3 months ago
518-43523
518 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
117-53056
3 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
117-53050
3 months ago
480-59929
480 days ago
15-38473
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
117-53041
3 months ago
492-77393
492 days ago
0-722
12 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
117-53036
3 months ago
384-63996
384 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
117-53026
3 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
117-52987
3 months ago
453-70236
453 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
117-52960
3 months ago
410-31774
410 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
117-52948
3 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
117-52929
3 months ago
343-62180
343 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
117-52843
3 months ago
329-51778
329 days ago
8-27909
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
117-52839
3 months ago
200-80627
200 days ago
117-82649
117 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
117-52823
3 months ago
280-83278
280 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
117-52816
3 months ago
280-83240
280 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
117-52788
3 months ago
133-70240
133 days ago
80-45431
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
117-52662
3 months ago
263-22332
263 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
117-52615
3 months ago
254-17340
254 days ago
0-163
2 minutes
26881 emo916math
author:emo916math
 feat(Analysis/Calculus/Deriv/Star): a formula for `deriv (conj ∘ f ∘ conj)` Added a lemma that `deriv (conj ∘ f ∘ conj) = conj ∘ deriv f ∘ conj`, proved by cases on whether the derivative mathematically exists or not. This PR replaces [#26805](https://github.com/leanprover-community/mathlib4/pull/26805); see discussion there. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) awaiting-author t-analysis new-contributor 50/2 Mathlib/Analysis/Calculus/Deriv/Star.lean 1 15 ['emo916math', 'github-actions', 'j-loreaux', 'kckennylau'] j-loreaux
assignee:j-loreaux
117-52609
3 months ago
220-52357
220 days ago
31-70575
31 days
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
117-52603
3 months ago
251-77612
251 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
117-52581
3 months ago
209-49602
209 days ago
7-9588
7 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
117-52557
3 months ago
267-21271
267 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
117-52526
3 months ago
146-39661
146 days ago
74-62001
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
117-52505
3 months ago
218-5172
218 days ago
0-454
7 minutes
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
117-52453
3 months ago
161-43976
161 days ago
40-67698
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
117-52442
3 months ago
190-79627
190 days ago
5-6013
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
117-52401
3 months ago
187-41976
187 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
117-52394
3 months ago
184-53464
184 days ago
0-1063
17 minutes
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
117-52306
3 months ago
208-26809
208 days ago
0-581
9 minutes
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
117-52280
3 months ago
139-34444
139 days ago
3-59454
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
117-38702
3 months ago
117-38702
117 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
116-52667
3 months ago
174-44074
174 days ago
15-76317
15 days
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). - [ ] depends on: #31508 --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict blocked-by-other-PR t-meta 1824/6 Mathlib.lean,Mathlib/Tactic.lean,Mathlib/Tactic/Algebra/Basic.lean,Mathlib/Tactic/Algebra/Lemmas.lean,Mathlib/Tactic/Polynomial/Basic.lean,Mathlib/Tactic/Polynomial/Core.lean,Mathlib/Util/Qq.lean,MathlibTest/Algebra.lean,MathlibTest/Polynomial.lean,scripts/noshake.json 10 3 ['github-actions', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] Vierkantor
assignee:Vierkantor
116-41849
3 months ago
125-48147
125 days ago
0-1388
23 minutes
29434 ntapiam
author:ntapiam
 feat(NonAssoc/LieAdmissible): prove every ring/algebra is LieAdmissible -awaiting-author t-algebra new-contributor
label:t-algebra$
 27/6 Mathlib/Algebra/NonAssoc/LieAdmissible/Defs.lean 1 2 ['github-actions', 'mathlib4-merge-conflict-bot'] nobody
115-37012
3 months ago
115-36164
115 days ago
0-1498
24 minutes
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
115-31391
3 months ago
229-44215
229 days ago
0-233
3 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
115-31387
3 months ago
247-75461
247 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
114-60851
3 months ago
114-60440
114 days ago
31-49241
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
114-27200
3 months ago
114-27200
114 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
113-57846
3 months ago
178-66646
178 days ago
29-55601
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
113-32635
3 months ago
113-36092
113 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
113-25459
3 months ago
126-8438
126 days ago
37-80545
37 days
31176 mcdoll
author:mcdoll
 feat(Analysis): Taylor's theorem with the integral remainder --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-analysis awaiting-author 169/2 Mathlib.lean,Mathlib/Analysis/Calculus/TaylorIntegral.lean,Mathlib/Analysis/Normed/Operator/BoundedLinearMaps.lean,docs/100.yaml,docs/undergrad.yaml 5 5 ['github-actions', 'mathlib4-merge-conflict-bot', 'sgouezel'] sgouezel
assignee:sgouezel
112-76500
3 months ago
112-76500
112 days ago
7-31176
7 days
28933 artie2000
author:artie2000
 chore(Data): correct definition for `single_apply` --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict WIP 42/40 Mathlib/Data/DFinsupp/Defs.lean,Mathlib/Data/DFinsupp/Sigma.lean,Mathlib/Data/Finsupp/Basic.lean,Mathlib/Data/Finsupp/Lex.lean,Mathlib/Data/Finsupp/SMul.lean,Mathlib/Data/Finsupp/Single.lean,Mathlib/Data/Finsupp/ToDFinsupp.lean,Mathlib/LinearAlgebra/Basis/Basic.lean,Mathlib/LinearAlgebra/Basis/Defs.lean,Mathlib/LinearAlgebra/DFinsupp.lean,Mathlib/LinearAlgebra/Finsupp/Defs.lean,Mathlib/LinearAlgebra/Finsupp/LinearCombination.lean,Mathlib/LinearAlgebra/Finsupp/Supported.lean,Mathlib/LinearAlgebra/Multilinear/DFinsupp.lean,Mathlib/LinearAlgebra/StdBasis.lean 15 3 ['github-actions', 'mathlib4-merge-conflict-bot'] nobody
112-69967
3 months ago
120-57471
120 days ago
0-2259
37 minutes
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
112-65581
3 months ago
117-80977
117 days ago
36-953
36 days
27756 grunweg
author:grunweg
 feat: `Weak(Pseudo)EMetricSpace`, generalises `(Pseudo)EMetricSpace` --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict WIP t-topology carleson 142/36 Mathlib/Topology/EMetricSpace/Defs.lean,Mathlib/Topology/Instances/ENNReal/Lemmas.lean 2 2 ['github-actions', 'mathlib4-merge-conflict-bot'] nobody
112-50332
3 months ago
228-52700
228 days ago
0-2
2 seconds
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
112-23848
3 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
112-12970
3 months ago
334-21720
334 days ago
2-85335
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
111-82234
3 months ago
114-24919
114 days ago
13-10528
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
111-66706
3 months ago
111-66680
111 days ago
0-92
1 minute
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
111-66614
3 months ago
111-66655
111 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
111-8493
3 months ago
111-63905
111 days ago
6-25774
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
111-7665
3 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
111-4279
3 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
110-60171
3 months ago
110-60171
110 days ago
64-6237
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
110-49147
3 months ago
270-79381
270 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
110-48643
3 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
110-33473
3 months ago
120-21655
120 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
110-24008
3 months ago
110-24009
110 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
109-77859
3 months ago
263-62436
263 days ago
0-189
3 minutes
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
109-68389
3 months ago
261-21867
261 days ago
58-34020
58 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
108-81273
3 months ago
108-81273
108 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
108-50807
3 months ago
217-52720
217 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
108-41932
3 months ago
172-50335
172 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
108-34638
3 months ago
129-75303
129 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
108-32414
3 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
107-76697
3 months ago
265-11212
265 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 95/55 Mathlib/ModelTheory/Bundled.lean,Mathlib/ModelTheory/Equivalence.lean,Mathlib/ModelTheory/Fraisse.lean,Mathlib/ModelTheory/Order.lean,Mathlib/ModelTheory/Satisfiability.lean 5 2 ['github-actions', 'jcommelin'] nobody
105-60101
3 months ago
105-60101
105 days ago
0-63848
17 hours
25816 sgouezel
author:sgouezel
 chore: kill coercion from EquivLike to Equiv --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict WIP t-logic 35/37 Mathlib/Logic/Equiv/Defs.lean 1 2 ['github-actions', 'leanprover-community-bot-assistant'] nobody
104-66008
3 months ago
277-54971
277 days ago
0-1
1 second
26776 sgouezel
author:sgouezel
 refactor: make `I` an outparam, and use forgetful inheritance in products I consider this as a failed experiment, so it's not for merging. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict WIP RFC 2411/1664 Mathlib/Analysis/Asymptotics/Defs.lean,Mathlib/Analysis/Asymptotics/Lemmas.lean,Mathlib/Analysis/CStarAlgebra/CStarMatrix.lean,Mathlib/Analysis/CStarAlgebra/Classes.lean,Mathlib/Analysis/CStarAlgebra/Module/Constructions.lean,Mathlib/Analysis/Calculus/InverseFunctionTheorem/ApproximatesLinearOn.lean,Mathlib/Analysis/Calculus/TangentCone.lean,Mathlib/Analysis/Calculus/TangentConeDef.lean,Mathlib/Analysis/Complex/Circle.lean,Mathlib/Analysis/Complex/UnitDisc/Basic.lean,Mathlib/Analysis/Complex/UpperHalfPlane/Topology.lean,Mathlib/Analysis/Normed/Module/Basic.lean,Mathlib/Analysis/Normed/Module/Prod.lean,Mathlib/Analysis/NormedSpace/HomeomorphBall.lean,Mathlib/Analysis/NormedSpace/Multilinear/Basic.lean,Mathlib/Analysis/NormedSpace/OperatorNorm/Basic.lean,Mathlib/Analysis/SpecialFunctions/Log/Basic.lean,Mathlib/Analysis/SpecialFunctions/PolarCoord.lean,Mathlib/Analysis/SpecialFunctions/Sqrt.lean,Mathlib/Analysis/SpecialFunctions/Trigonometric/Arctan.lean,Mathlib/Analysis/SpecialFunctions/Trigonometric/Inverse.lean,Mathlib/Geometry/Manifold/Algebra/Monoid.lean,Mathlib/Geometry/Manifold/AnalyticManifold.lean,Mathlib/Geometry/Manifold/ChartedSpace.lean,Mathlib/Geometry/Manifold/Complex.lean,Mathlib/Geometry/Manifold/ContMDiff/Basic.lean,Mathlib/Geometry/Manifold/ContMDiff/Constructions.lean,Mathlib/Geometry/Manifold/ContMDiff/Defs.lean,Mathlib/Geometry/Manifold/ContMDiff/NormedSpace.lean,Mathlib/Geometry/Manifold/Instances/Real.lean,Mathlib/Geometry/Manifold/Instances/Sphere.lean,Mathlib/Geometry/Manifold/IsManifold/Basic.lean,Mathlib/Geometry/Manifold/IsManifold/ExtChartAt.lean,Mathlib/Geometry/Manifold/IsManifold/ModelWithCornersDef.lean,Mathlib/Geometry/Manifold/LocalDiffeomorph.lean,Mathlib/Geometry/Manifold/LocalInvariantProperties.lean,Mathlib/Geometry/Manifold/MFDeriv/Atlas.lean,Mathlib/Geometry/Manifold/MFDeriv/Basic.lean,Mathlib/Geometry/Manifold/MFDeriv/Defs.lean,Mathlib/Geometry/Manifold/MFDeriv/FDeriv.lean,Mathlib/Geometry/Manifold/MFDeriv/SpecificFunctions.lean,Mathlib/Geometry/Manifold/MFDeriv/UniqueDifferential.lean,Mathlib/Geometry/Manifold/VectorBundle/Basic.lean,Mathlib/Geometry/Manifold/VectorBundle/FiberwiseLinear.lean,Mathlib/Geometry/Manifold/VectorBundle/Hom.lean,Mathlib/Geometry/Manifold/VectorBundle/MDifferentiable.lean,Mathlib/Geometry/Manifold/VectorBundle/Tangent.lean,Mathlib/MeasureTheory/Constructions/BorelSpace/Basic.lean,Mathlib/MeasureTheory/Function/SimpleFuncDenseLp.lean,Mathlib/NumberTheory/Modular.lean,Mathlib/NumberTheory/NumberField/CanonicalEmbedding/NormLeOne.lean,Mathlib/Topology/Algebra/Constructions.lean,Mathlib/Topology/Algebra/Module/LocallyConvex.lean,Mathlib/Topology/Algebra/PontryaginDual.lean,Mathlib/Topology/Bases.lean,Mathlib/Topology/Basic.lean,Mathlib/Topology/CWComplex/Classical/Basic.lean,Mathlib/Topology/Clopen.lean,Mathlib/Topology/Connected/TotallyDisconnected.lean,Mathlib/Topology/Constructions/SumProd.lean,Mathlib/Topology/ContinuousMap/Bounded/Basic.lean,Mathlib/Topology/ContinuousOn.lean,Mathlib/Topology/ContinuousOnMore.lean,Mathlib/Topology/Covering.lean,Mathlib/Topology/Defs/Basic.lean,Mathlib/Topology/Defs/Filter.lean,Mathlib/Topology/FiberBundle/Basic.lean,Mathlib/Topology/FiberBundle/Constructions.lean,Mathlib/Topology/FiberBundle/Trivialization.lean,Mathlib/Topology/Inseparable.lean,Mathlib/Topology/Instances/AddCircle.lean,Mathlib/Topology/Instances/Shrink.lean,Mathlib/Topology/Instances/TrivSqZeroExt.lean,Mathlib/Topology/Irreducible.lean,Mathlib/Topology/IsLocalHomeomorph.lean,Mathlib/Topology/LocallyFinite.lean,Mathlib/Topology/OmegaCompletePartialOrder.lean,Mathlib/Topology/Order/LeftRight.lean,Mathlib/Topology/PartialHomeomorph.lean,Mathlib/Topology/PartialHomeomorphMore.lean,Mathlib/Topology/Separation/Basic.lean,Mathlib/Topology/Separation/Regular.lean,Mathlib/Topology/UniformSpace/Basic.lean,Mathlib/Topology/UniformSpace/Cauchy.lean,Mathlib/Topology/UniformSpace/Defs.lean,Mathlib/Topology/UniformSpace/UniformConvergenceTopology.lean,Mathlib/Topology/VectorBundle/Basic.lean,Mathlib/Topology/VectorBundle/Hom.lean 88 0 [] nobody
104-65988
3 months ago
254-81117
254 days ago
0-1
1 second
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
104-48235
3 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
104-47370
3 months ago
114-52320
114 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
104-33644
3 months ago
861-66829
861 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
104-32502
3 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
103-61886
3 months ago
231-77686
231 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
103-55116
3 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
102-59003
3 months ago
169-57657
169 days ago
25-3098
25 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 131/0 Mathlib.lean,Mathlib/Lean/Syntax.lean,Mathlib/Util/DeclarationManipulation.lean 3 4 ['github-actions', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
102-8534
3 months ago
102-8483
102 days ago
2-29765
2 days
31242 plp127
author:plp127
 feat: express filter as supremum of principal filter and free filter Prove a filter is free iff it is smaller than the cofinite filter. Prove that every filter decomposes as the disjoint supremum of a principal filter and a free filter. --- - [ ] depends on: #31264 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-order awaiting-author merge-conflict 55/0 Mathlib/Order/Filter/Cofinite.lean,Mathlib/Order/Lattice.lean 2 7 ['github-actions', 'jcommelin', 'kckennylau', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot', 'plp127'] bryangingechen
assignee:bryangingechen
102-1952
3 months ago
105-62946
105 days ago
24-22847
24 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
101-57983
3 months ago
101-56240
101 days ago
0-2143
35 minutes
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
101-53250
3 months ago
114-20063
114 days ago
0-34649
9 hours
31597 grunweg
author:grunweg
 chore(AtLocation): allow throwing a warning when no progress is being made A future PR will use this to make `by_contra!` and friends warn if the `push_neg` step makes no progress. Co-authored by: Jovan Gerbscheid --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) awaiting-author t-meta merge-conflict 46/28 Mathlib/Tactic/Abel.lean,Mathlib/Tactic/Field.lean,Mathlib/Tactic/FieldSimp.lean,Mathlib/Tactic/NormNum/Core.lean,Mathlib/Tactic/Push.lean,Mathlib/Tactic/ReduceModChar.lean,Mathlib/Tactic/Ring/RingNF.lean,Mathlib/Util/AtLocation.lean,MathlibTest/FieldSimp.lean,MathlibTest/abel.lean 10 7 ['JovanGerb', 'fpvandoorn', 'github-actions', 'mathlib4-merge-conflict-bot', 'thorimur'] thorimur
assignee:thorimur
101-50519
3 months ago
115-48024
115 days ago
7-68323
7 days
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
101-40012
3 months ago
109-83555
109 days ago
39-49182
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
101-39888
3 months ago
110-62314
110 days ago
16-82714
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
101-35490
3 months ago
283-61834
283 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
101-15118
3 months ago
178-30826
178 days ago
44-10271
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 226/1 Mathlib/Data/Nat/Choose/Binomial.lean,Mathlib/Data/Nat/Choose/Multinomial.lean 2 1 ['github-actions'] nobody
100-79778
3 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 0/4 Mathlib/RingTheory/Kaehler/JacobiZariski.lean 1 13 ['chrisflav', 'erdOne', 'github-actions', 'leanprover-radar', 'mattrobball'] nobody
100-59113
3 months ago
100-59113
100 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
100-14677
3 months ago
unknown
0-0
0 seconds
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 - [x] depends on: #18534 - [x] depends on: #18527 - [x] depends on: #18440 - [ ] 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
99-56350
3 months ago
unknown
0-0
0 seconds
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 391/0 Mathlib.lean,Mathlib/Combinatorics/DiHypergraph/Basic.lean 2 2 ['github-actions', 'mathlib4-merge-conflict-bot'] b-mehta
assignee:b-mehta
98-62927
3 months ago
98-62880
98 days ago
57-69412
57 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
98-60723
3 months ago
98-60723
98 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
98-53796
3 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
98-53794
3 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
98-53794
3 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
98-8772
3 months ago
unknown
0-0
0 seconds
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
97-31035
3 months ago
unknown
0-0
0 seconds
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 merge-conflict 375/0 Mathlib.lean,Mathlib/Combinatorics/Hypergraph/Basic.lean 2 54 ['b-mehta', 'espottesmith', 'github-actions', 'jt496', 'lauramonk', 'mathlib4-merge-conflict-bot'] b-mehta
assignee:b-mehta
96-80336
3 months ago
98-62878
98 days ago
76-58243
76 days
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
96-60880
3 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 629/0 Mathlib.lean,Mathlib/Data/QuotType.lean,MathlibTest/QuotType.lean 3 20 ['YaelDillies', 'astrainfinita', 'github-actions', 'mathlib4-merge-conflict-bot', 'plp127', 'vihdzp'] nobody
96-35015
3 months ago
149-3868
149 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
96-25759
3 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
95-73955
3 months ago
143-76489
143 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 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 9 ['github-actions', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
95-66253
3 months ago
144-78916
144 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', 'leanprover-community-mathlib4-bot'] nobody
95-54650
3 months ago
942-38992
942 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
95-21740
3 months ago
204-47186
204 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
94-70431
3 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
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 3 ['erdOne', 'github-actions', 'leanprover-radar'] nobody
94-9328
3 months ago
unknown
0-0
0 seconds
32869 felixpernegger
author:felixpernegger
 feat(RingTheory): lemmas around ```Ring.choose``` Various small lemmas around Ring.choose. In particular this should cover all statements from .Data.Nat.Choose.Basic which have a meaningful generalization to arbitrary rings. new-contributor t-ring-theory 170/0 Mathlib/RingTheory/Binomial.lean,Mathlib/RingTheory/Polynomial/Pochhammer.lean 2 1 ['github-actions'] nobody
92-75588
3 months ago
92-85123
92 days ago
0-1503
25 minutes
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
92-52829
3 months ago
92-52829
92 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
91-34756
3 months ago
108-56658
108 days ago
0-309
5 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
91-28877
3 months ago
98-38070
98 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
91-25754
3 months ago
112-61703
112 days ago
60-67125
60 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
90-73516
3 months ago
91-75596
91 days ago
2-53608
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
90-5979
3 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
89-66879
2 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
89-37891
2 months ago
121-51008
121 days ago
0-9721
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
89-37890
2 months ago
96-36517
96 days ago
0-16600
4 hours
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
89-32744
2 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
88-78815
2 months ago
402-30985
402 days ago
2-69252
2 days
25963 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. --- - [ ] 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/20836 merge-conflict WIP t-algebra
label:t-algebra$
 354/179 Mathlib/Algebra/Group/Subsemigroup/Basic.lean,Mathlib/Algebra/Group/Subsemigroup/Defs.lean,Mathlib/Data/SetLike/Basic.lean,Mathlib/Data/SetLike/Closure.lean 4 3 ['artie2000', 'github-actions', 'leanprover-community-bot-assistant'] nobody
88-50316
2 months ago
unknown
0-0
0 seconds
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
87-76231
2 months ago
87-76271
87 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
87-68216
2 months ago
87-68273
87 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
87-57893
2 months ago
130-43594
130 days ago
2-14235
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 bench-after-CI merge-conflict 2/0 Mathlib/Algebra/Quotient.lean 1 2 ['github-actions', 'mathlib4-merge-conflict-bot'] nobody
87-43212
2 months ago
403-66042
403 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
87-24600
2 months ago
87-24600
87 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
86-56797
2 months ago
146-21365
146 days ago
54-75088
54 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 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 2 ['github-actions', 'mathlib4-dependent-issues-bot'] nobody
85-56287
2 months ago
unknown
0-0
0 seconds
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 31 ['D-Thomine', 'github-actions', 'leanprover-community-bot-assistant', 'lua-vr', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot', 'sgouezel', 'urkud'] sgouezel
assignee:sgouezel
84-79220
2 months ago
90-37138
90 days ago
98-51478
98 days
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
84-14797
2 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
84-3062
2 months ago
84-8347
84 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
84-2954
2 months ago
84-8121
84 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
84-2870
2 months ago
84-7933
84 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
84-542
2 months ago
84-543
84 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
84-540
2 months ago
84-541
84 days ago
0-1431
23 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
84-539
2 months ago
84-540
84 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
84-537
2 months ago
84-538
84 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
84-534
2 months ago
84-537
84 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
84-533
2 months ago
84-534
84 days ago
0-2387
39 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 148/3 Mathlib/Analysis/Normed/Module/WeakDual.lean,Mathlib/Topology/Algebra/Module/WeakDual.lean,docs/references.bib 3 2 ['github-actions'] nobody
83-41321
2 months ago
86-40549
86 days ago
0-16
16 seconds
33178 gw90
author:gw90
 feat(Analysis/CStarAlgebra/Spectrum): Adding lemmas that the CStarAlgebra norm equals the square root of the spectral radius of star a * a Adds lemmas that the ||a||^2_A=sqrt(spectralRadius C (star a * a)). I think it would be helpful to have these lemmas available in Mathlib. It'll help with some of the other things I'm working on. Feel free to move them to a different file or rename them as you see fit. new-contributor t-analysis awaiting-author 24/0 Mathlib/Analysis/CStarAlgebra/Spectrum.lean 1 15 ['github-actions', 'gw90', 'themathqueen', 'vihdzp'] nobody
83-38801
2 months ago
85-14420
85 days ago
0-15209
4 hours
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
82-2445
2 months ago
82-2486
82 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
81-29774
2 months ago
81-29774
81 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
80-60686
2 months ago
unknown
0-0
0 seconds
33313 SnirBroshi
author:SnirBroshi
 feat(Combinatorics/SimpleGraph/EdgeColoring): create a basic edge-coloring API --- Future work (which I'm working on): - Relating degrees to edge-colorability (`G.maxDegree ≤ G.chromaticIndex`) - [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)` - [ ] depends on: #33292 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) large-import t-combinatorics blocked-by-other-PR 307/4 Mathlib.lean,Mathlib/Combinatorics/SimpleGraph/EdgeColoring.lean,Mathlib/Combinatorics/SimpleGraph/LineGraph.lean,Mathlib/Data/Sym/Sym2.lean 4 2 ['github-actions', 'mathlib4-dependent-issues-bot'] nobody
80-48563
2 months ago
80-50980
80 days ago
0-471
7 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
80-40631
2 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
80-40528
2 months ago
1010-25258
1010 days ago
0-753
12 minutes
6042 MohanadAhmed
author:MohanadAhmed
 feat(LinearAlgebra/Matrix/SVD): Singular Value Decomposition of R or C Matrices This file provides proves the SVD theorem which decomposes a real/complex matrix into left eigenvectors, singular values block diagonal matrix and right eigenvectors. Any matrix A (M × N) with rank r = A.rank and with elements in ℝ or ℂ fields can be decompsed into the product of three matrices: $$A = USV$$ * The three matrices are defined as - $U$: an M × M matrix containing the left eigenvectors of the matrix - $S$: an M × N matrix with an r × r block in the upper left corner with nonzero singular values - $V$: an N × N matrix containing the right eigenvectors of the matrix Note that * $S$ is a block matrix $S = [S₁₁, S₁₂; S₂₁, S₂₂]$ with - $S₁₁$: a diagonal r × r matrix and - $S₁₂$ : r × (N - r) zero matrix, S₂₁ : (M - r) × r zero matrix and - $S₂₂$: (M - r) × (N - r) zero matrix * $U$ is a block column matrix U = [U₁ U₂] with - $U₁$ : a M × r containing left eigenvectors with nonzero singular values. - $U₂$ : a M × (M - r) containing left eigenvectors with zero singular values. * $V$ is a block column matrix V = [V₁ V₂] with - $V₁$ : a N × r containing right eigenvectors with nonzero singular values. - $V₂$ : a M × (M - r) containing right eigenvectors with zero singular values. Since in mathlib the eigenvalues of hermitian matrices are defined in an "arbitrary" undetermined order, we begin by partition the singular values into zero and non-zero values. We partition the corresponding eigenvectors from AᴴA and AAᴴ using similar rearrangements. These are included in `SVD.svdReindex`. The basic API for Column and Row partitioned matrices is from `ColumnRowPartitioned`. We then proceed to transfer some of the lemmas we need about eigenvector matrices (for example that they are unitary: i.e. inverse is conjugate transpose.). Note that since invertibility in mathlib is defined for square matrices while our matrices are partitioned i.e. N × (N₁ ⊕ N₂) and N ≃ (N ⊕ N₂), Lean cannot apply the Invertible definition. We workaround this were necessary. Lemma `reduced_spectral_theorem` (`reduced_spectral_theorem'`) shows that AᴴA and AAᴴ, can be reduced to products containing only the non-zero singular eigenvectors. This is later used in proving the main SVD theroem. A few lemmas are provided about the invertibility of the non-zero singular values matrix: `svdσ_inv`, `σ_inv_μ_σ_inv_eq_one`, `IsUnit_det_svdσ`, `IsUnit_det_svdσ_mapK` and `svdσ_inv_mapK`. To make relating left eigenvectors to right eigenvectors easier we define U₁ = AV₁σ⁻¹ while U₂ is obtained from the eigenvectors of (AAᴴ). This avoid a lengthy reindexing operation with many proofs. The vectors in U₂ have no such issue since they are multiplied by zero singular values anyway. Co-authored-by: Mohanad Ahmed --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) please-adopt WIP t-algebra merge-conflict
label:t-algebra$
 588/0 Mathlib.lean,Mathlib/LinearAlgebra/Matrix/SVD/Defs.lean,Mathlib/LinearAlgebra/Matrix/SVD/Reindex.lean 3 116 ['MohanadAhmed', 'Vierkantor', 'alexjbest', 'eric-wieser', 'j-loreaux', 'jcommelin', 'mathlib4-merge-conflict-bot', 'sgouezel', 'vihdzp'] nobody
80-40158
2 months ago
762-40446
762 days ago
197-21527
197 days
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
80-36503
2 months ago
1023-56344
1023 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
80-29019
2 months ago
103-32476
103 days ago
3-49892
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
80-20236
2 months ago
209-36336
209 days ago
19-20394
19 days
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
79-64599
2 months ago
91-39889
91 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` --- - [ ] depends on: #21031 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra awaiting-author blocked-by-other-PR merge-conflict
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', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot', 'vihdzp'] nobody
79-58127
2 months ago
89-32674
89 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
79-45671
2 months ago
79-45671
79 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
79-38621
2 months ago
79-38621
79 days ago
5-82139
5 days
25481 kbuzzard
author:kbuzzard
 chore: refactor Algebra.TensorProduct.rightAlgebra 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/) t-algebra
label:t-algebra$
 29/6 Mathlib/RingTheory/TensorProduct/Basic.lean 1 8 ['adomani', 'github-actions', 'kbuzzard', 'leanprover-bot', 'mathlib-bors', 'mathlib4-merge-conflict-bot'] adomani
assignee:adomani
78-51748
2 months ago
227-60899
227 days ago
56-85445
56 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'] dagurtomas
assignee:dagurtomas
78-36804
2 months ago
78-36804
78 days ago
1-46473
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
78-14919
2 months ago
609-30323
609 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
78-2327
2 months ago
184-26385
184 days ago
0-6833
1 hour
31018 joelriou
author:joelriou
 feat(CategoryTheory): the κ-accessible category of κ-directed posets WIP --- - [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 446/4 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
77-47525
2 months ago
139-48733
139 days ago
0-1
1 second
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
77-44922
2 months ago
unknown
0-0
0 seconds
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
76-31451
2 months ago
313-38393
313 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
76-2160
2 months ago
77-57040
77 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
74-81140
2 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
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 10 ['Ruben-VandeVelde', 'astrainfinita', 'github-actions', 'leanprover-radar'] nobody
74-68764
2 months ago
74-68764
74 days ago
0-17677
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
74-32488
2 months ago
74-45802
74 days ago
0-121
2 minutes
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). --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-category-theory awaiting-author 187/0 Mathlib.lean,Mathlib/CategoryTheory/MorphismProperty/Basic.lean,Mathlib/CategoryTheory/MorphismProperty/IsSmall.lean,Mathlib/CategoryTheory/ObjectProperty/FunctorCategory/Presheaf.lean,Mathlib/CategoryTheory/ObjectProperty/Local.lean 5 6 ['github-actions', 'joelriou', 'robin-carlier'] nobody
73-75721
2 months ago
73-75721
73 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
73-69782
2 months ago
93-67523
93 days ago
0-157
2 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
73-66812
2 months ago
73-66812
73 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
73-33756
2 months ago
84-68587
84 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
73-17390
2 months ago
160-52809
160 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
73-17342
2 months ago
200-47855
200 days ago
43-1605
43 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
73-17328
2 months ago
160-56525
160 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
73-17300
2 months ago
112-65616
112 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
73-9252
2 months ago
165-21577
165 days ago
9-26430
9 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
72-73535
2 months ago
88-33866
88 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
72-33736
2 months ago
72-33737
72 days ago
0-60133
16 hours
22657 Xmask19
author:Xmask19
 feat: a graph is maximally acyclic iff it is a tree --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-combinatorics new-contributor 86/0 Mathlib/Combinatorics/SimpleGraph/Acyclic.lean 1 8 ['Rida-Hamadani', 'SnirBroshi', 'b-mehta', 'github-actions', 'grunweg', 'mathlib4-merge-conflict-bot'] b-mehta
assignee:b-mehta
72-26829
2 months ago
342-56148
342 days ago
21-77121
21 days
28013 astrainfinita
author:astrainfinita
 feat: Lindemann-Weierstrass Theorem This PR continues the work from #6718. -------- - [x] depends on: #18693 - [x] depends on: #29121 t-algebra t-analysis awaiting-author merge-conflict
label:t-algebra$
 1106/55 Mathlib.lean,Mathlib/Algebra/MonoidAlgebra/Basic.lean,Mathlib/Algebra/MonoidAlgebra/MapDomain.lean,Mathlib/Algebra/Polynomial/Factors.lean,Mathlib/Data/Finsupp/Defs.lean,Mathlib/Data/Finsupp/Indicator.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 12 15 ['astrainfinita', 'github-actions', 'grunweg', 'j-loreaux', 'jcommelin', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
71-34143
2 months ago
120-30750
120 days ago
3-86310
3 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
71-29319
2 months ago
406-25842
406 days ago
0-2312
38 minutes
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
71-26163
2 months ago
73-62016
73 days ago
13-49137
13 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 242/25 Mathlib.lean,Mathlib/NumberTheory/LSeries/AbstractFuncEq.lean,Mathlib/NumberTheory/LSeries/HurwitzZetaOdd.lean,Mathlib/NumberTheory/ModularForms/LFunction.lean 4 7 ['github-actions', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
70-61957
2 months ago
134-52584
134 days ago
0-1
1 second
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 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 9 ['Jlh18', 'github-actions', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot', 'sinhp'] nobody
70-47155
2 months ago
158-53451
158 days ago
0-2073
34 minutes
32991 artie2000
author:artie2000
 chore(Algebra/Algebra): remove `Algebra.cast` coercion See discussion at https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/Algebra.2Ecast/with/564501144 --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra merge-conflict
label:t-algebra$
 32/125 Mathlib/Algebra/Algebra/Basic.lean,Mathlib/Algebra/Algebra/Defs.lean,Mathlib/Algebra/Algebra/Field.lean,Mathlib/Algebra/Algebra/Subalgebra/Lattice.lean,Mathlib/Algebra/BigOperators/Expect.lean,Mathlib/Analysis/Normed/Algebra/Ultra.lean,Mathlib/FieldTheory/Differential/Liouville.lean,Mathlib/LinearAlgebra/Ray.lean,Mathlib/RingTheory/Localization/FractionRing.lean 9 11 ['Vierkantor', 'artie2000', 'github-actions', 'mathlib4-merge-conflict-bot', 'plp127', 'vihdzp'] Vierkantor
assignee:Vierkantor
70-46209
2 months ago
88-45267
88 days ago
0-3633
1 hour
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
70-44902
2 months ago
180-66612
180 days ago
3-79180
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
70-36734
2 months ago
517-83971
517 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
70-35436
2 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
70-12286
2 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
69-66212
2 months ago
70-18162
70 days ago
0-83
1 minute
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 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 8 ['github-actions', 'j-loreaux'] urkud
assignee:urkud
69-36563
2 months ago
69-36563
69 days ago
4-44581
4 days
13740 YaelDillies
author:YaelDillies
 feat: more robust ae notation Make sure that, when `μ : FiniteMeasure Ω`, `f =ᵐ[μ] g` elaborates to `f =ᵐ[↑μ] g` instead of complaining about `OuterMeasureClass (FiniteMeasure Ω) (Set Ω) ℝ≥0∞` not existing. [Zulip](https://leanprover.zulipchat.com/#narrow/stream/287929-mathlib4/topic/ae.20of.20a.20finite.20measure) --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-meta t-measure-probability awaiting-author 67/8 Mathlib/MeasureTheory/Integral/Bochner/L1.lean,Mathlib/MeasureTheory/Measure/Decomposition/IntegralRNDeriv.lean,Mathlib/MeasureTheory/Measure/MeasureSpaceDef.lean,Mathlib/MeasureTheory/OuterMeasure/AE.lean,Mathlib/MeasureTheory/OuterMeasure/BorelCantelli.lean,Mathlib/Probability/Notation.lean 6 41 ['YaelDillies', 'eric-wieser', 'github-actions', 'leanprover-community-bot-assistant', 'thorimur', 'urkud'] RemyDegenne and thorimur
assignee:RemyDegenne assignee:thorimur
69-35855
2 months ago
69-35907
69 days ago
62-16320
62 days
32165 yuanyi-350
author:yuanyi-350
 feat(Real/Trigonometric): Add `sum_cos_arith_progression` and prepare for Dirichlet kernel --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-analysis awaiting-author merge-conflict 68/0 Mathlib.lean,Mathlib/Analysis/Fourier/DirichletKernel.lean 2 8 ['BoltonBailey', 'github-actions', 'mathlib4-merge-conflict-bot', 'urkud', 'yuanyi-350'] fpvandoorn
assignee:fpvandoorn
69-25027
2 months ago
106-11809
106 days ago
3-74302
3 days
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
69-3328
2 months ago
69-50061
69 days ago
7-33574
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
69-3203
2 months ago
74-81436
74 days ago
0-1262
21 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 6/17 Mathlib/Data/Finsupp/Indicator.lean 1 1 ['github-actions'] nobody
68-58693
2 months ago
68-36774
68 days ago
4-46258
4 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
68-46575
2 months ago
69-39324
69 days ago
1-85838
1 day
33561 kbuzzard
author:kbuzzard
 chore: cont -> continuous_toFun This field is sometimes called `cont` and sometimes `continuous_toFun`. I noticed that the `continuity` tactic sometimes takes a lot longer to prove `cont` even if `continuous_toFun` is available so I thought I'd change them all to see if this speed up mathlib. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict 171/149 Mathlib/Algebra/Category/ContinuousCohomology/Basic.lean,Mathlib/Algebra/Category/ModuleCat/Topology/Homology.lean,Mathlib/Analysis/Analytic/Composition.lean,Mathlib/Analysis/Analytic/Polynomial.lean,Mathlib/Analysis/CStarAlgebra/CStarMatrix.lean,Mathlib/Analysis/CStarAlgebra/ContinuousFunctionalCalculus/NonUnital.lean,Mathlib/Analysis/CStarAlgebra/ContinuousFunctionalCalculus/Unital.lean,Mathlib/Analysis/Calculus/ContDiff/FaaDiBruno.lean,Mathlib/Analysis/Calculus/FDeriv/Basic.lean,Mathlib/Analysis/Calculus/FDeriv/Extend.lean,Mathlib/Analysis/Distribution/ContDiffMapSupportedIn.lean,Mathlib/Analysis/Distribution/DerivNotation.lean,Mathlib/Analysis/Distribution/SchwartzSpace.lean,Mathlib/Analysis/Distribution/TemperedDistribution.lean,Mathlib/Analysis/Distribution/TestFunction.lean,Mathlib/Analysis/Fourier/FourierTransform.lean,Mathlib/Analysis/Fourier/LpSpace.lean,Mathlib/Analysis/InnerProductSpace/LinearPMap.lean,Mathlib/Analysis/LocallyConvex/Barrelled.lean,Mathlib/Analysis/LocallyConvex/PointwiseConvergence.lean,Mathlib/Analysis/LocallyConvex/Separation.lean,Mathlib/Analysis/LocallyConvex/WeakOperatorTopology.lean,Mathlib/Analysis/LocallyConvex/WeakSpace.lean,Mathlib/Analysis/Normed/Affine/Isometry.lean,Mathlib/Analysis/Normed/Algebra/Spectrum.lean,Mathlib/Analysis/Normed/Lp/PiLp.lean,Mathlib/Analysis/Normed/Lp/ProdLp.lean,Mathlib/Analysis/Normed/Lp/lpSpace.lean,Mathlib/Analysis/Normed/Module/Alternating/Basic.lean,Mathlib/Analysis/Normed/Module/Multilinear/Basic.lean,Mathlib/Analysis/Normed/Module/WeakDual.lean,Mathlib/Analysis/Normed/Operator/Banach.lean,Mathlib/Analysis/Normed/Operator/BoundedLinearMaps.lean,Mathlib/Analysis/Normed/Operator/Extend.lean,Mathlib/Analysis/RCLike/Extend.lean,Mathlib/Geometry/Euclidean/Incenter.lean,Mathlib/Geometry/Manifold/LocalDiffeomorph.lean,Mathlib/Geometry/Manifold/MFDeriv/Atlas.lean,Mathlib/MeasureTheory/Function/ConditionalExpectation/Basic.lean,Mathlib/MeasureTheory/Function/ConditionalExpectation/CondexpL1.lean,Mathlib/MeasureTheory/Function/SimpleFuncDenseLp.lean,Mathlib/MeasureTheory/Integral/Bochner/L1.lean,Mathlib/MeasureTheory/Measure/FiniteMeasure.lean,Mathlib/NumberTheory/ModularForms/JacobiTheta/TwoVariable.lean,Mathlib/Probability/Distributions/Fernique.lean,Mathlib/Probability/Moments/CovarianceBilinDual.lean,Mathlib/Topology/Algebra/AffineSubspace.lean,Mathlib/Topology/Algebra/Algebra.lean,Mathlib/Topology/Algebra/ContinuousAffineEquiv.lean,Mathlib/Topology/Algebra/ContinuousAffineMap.lean,Mathlib/Topology/Algebra/Module/Alternating/Basic.lean,Mathlib/Topology/Algebra/Module/Alternating/Topology.lean,Mathlib/Topology/Algebra/Module/CharacterSpace.lean,Mathlib/Topology/Algebra/Module/Equiv.lean,Mathlib/Topology/Algebra/Module/LinearMap.lean,Mathlib/Topology/Algebra/Module/LinearMapPiProd.lean,Mathlib/Topology/Algebra/Module/Multilinear/Basic.lean,Mathlib/Topology/Algebra/Module/Multilinear/Topology.lean,Mathlib/Topology/Algebra/Module/PointwiseConvergence.lean,Mathlib/Topology/Algebra/Module/Star.lean,Mathlib/Topology/Algebra/Module/StrongTopology.lean,Mathlib/Topology/Algebra/Module/WeakDual.lean,Mathlib/Topology/ContinuousMap/Algebra.lean,Mathlib/Topology/ContinuousMap/Ideals.lean,Mathlib/Topology/Instances/TrivSqZeroExt.lean,Mathlib/Topology/VectorBundle/Basic.lean 66 5 ['eric-wieser', 'github-actions', 'kbuzzard', 'leanprover-radar', 'mathlib4-merge-conflict-bot'] nobody
68-27829
2 months ago
68-27830
68 days ago
2-81715
2 days
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
68-25512
2 months ago
233-68318
233 days ago
0-2
2 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 5 ['Vierkantor', 'github-actions', 'grunweg', 'mathlib4-merge-conflict-bot'] nobody
68-22509
2 months ago
201-75099
201 days ago
0-2565
42 minutes
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 merge-conflict 311/0 Mathlib.lean,Mathlib/Analysis/Calculus/ArcLengthReparametrization.lean,Mathlib/MeasureTheory/Integral/IntervalIntegral/FundThmCalculus.lean,docs/references.bib,lake-manifest.json 5 53 ['SnirBroshi', 'github-actions', 'grunweg', 'j-loreaux', 'mathlib4-merge-conflict-bot', 'michael-novak-math'] j-loreaux
assignee:j-loreaux
68-17689
2 months ago
68-17690
68 days ago
6-71429
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
67-61364
2 months ago
337-36409
337 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
67-55234
2 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 - [ ] depends on: #26332 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict large-import t-logic 529/8 Mathlib/Data/Rel.lean,Mathlib/ModelTheory/Definability.lean,Mathlib/ModelTheory/Semantics.lean,Mathlib/ModelTheory/Syntax.lean,scripts/noshake.json 5 8 ['Timeroot', 'github-actions', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot', 'staroperator'] nobody
67-55075
2 months ago
205-33028
205 days ago
3-3620
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
67-50074
2 months ago
132-54643
132 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
67-50073
2 months ago
151-49813
151 days ago
0-345
5 minutes
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
67-47040
2 months ago
67-47040
67 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 [ ] depends on: #30141 --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-topology new-contributor merge-conflict 83/1 Mathlib/Topology/Baire/NonMeagre.lean,Mathlib/Topology/GDelta/Basic.lean 2 2 ['github-actions', 'mathlib4-merge-conflict-bot'] nobody
66-56724
2 months ago
165-28151
165 days ago
0-1020
17 minutes
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
66-27584
2 months ago
135-17127
135 days ago
0-1291
21 minutes
32401 ADedecker
author:ADedecker
 feat: monotonicity of D^n(U) in n and in U as CLMs --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-analysis delegated 170/3 Mathlib/Analysis/Distribution/ContDiffMapSupportedIn.lean,Mathlib/Analysis/Distribution/TestFunction.lean 2 19 ['ADedecker', 'faenuccio', 'github-actions', 'j-loreaux', 'mathlib-bors', 'mathlib4-merge-conflict-bot'] nobody
66-27100
2 months ago
75-31725
75 days ago
16-56139
16 days
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
66-27098
2 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
66-26972
2 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
66-24057
2 months ago
140-57442
140 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
65-79089
2 months ago
69-44617
69 days ago
0-3399
56 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
65-25627
2 months ago
191-54006
191 days ago
82-7527
82 days
25907 mans0954
author:mans0954
 feat: low order roots of unity This PR continues the work from #25470. Original PR: https://github.com/leanprover-community/mathlib4/pull/25470 t-algebra please-adopt
label:t-algebra$
 182/0 Mathlib/Algebra/CharP/Invertible.lean,Mathlib/RingTheory/RootsOfUnity/Complex.lean 2 3 ['github-actions', 'mans0954', 'urkud'] jcommelin
assignee:jcommelin
65-25610
2 months ago
117-39195
117 days ago
157-25048
157 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
65-25588
2 months ago
265-82037
265 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
65-25572
2 months ago
257-31234
257 days ago
0-4698
1 hour
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
65-25564
2 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
65-25341
2 months ago
265-82639
265 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
65-25334
2 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
65-20137
2 months ago
265-81265
265 days ago
0-562
9 minutes
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
65-20118
2 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
65-20114
2 months ago
117-80612
117 days ago
142-46248
142 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
65-20070
2 months ago
260-38415
260 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
65-20061
2 months ago
265-81356
265 days ago
0-72
1 minute
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
65-20028
2 months ago
162-44285
162 days ago
0-23671
6 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
65-19995
2 months ago
117-79349
117 days ago
41-47583
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
65-19976
2 months ago
191-43667
191 days ago
0-645
10 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
65-19832
2 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
65-19816
2 months ago
153-9717
153 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
65-19557
2 months ago
unknown
0-0
0 seconds
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 ['leanprover-community-mathlib4-bot', 'urkud'] nobody
64-7135
2 months ago
648-67603
648 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
64-7042
2 months ago
668-62867
668 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
64-6919
2 months ago
203-37505
203 days ago
18-39479
18 days
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
63-53926
2 months ago
200-43775
200 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 28 ['0xTerencePrime', 'ADedecker', 'github-actions', 'j-loreaux'] ADedecker
assignee:ADedecker
63-39808
2 months ago
63-40029
63 days ago
22-22665
22 days
33435 astrainfinita
author:astrainfinita
 feat: algebra automorphisms of monoid algebras --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-algebra
label:t-algebra$
 53/3 Mathlib/Algebra/MonoidAlgebra/Basic.lean 1 2 ['github-actions', 'mathlib4-merge-conflict-bot'] kbuzzard
assignee:kbuzzard
62-37742
2 months ago
62-37743
62 days ago
13-16290
13 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
62-31296
2 months ago
65-76919
65 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
62-4393
2 months ago
62-1021
62 days ago
0-3444
57 minutes
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 1340/5 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 11 13 ['github-actions', 'grunweg', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
61-79810
2 months ago
266-78214
266 days ago
0-2
2 seconds
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
61-53848
2 months ago
150-46954
150 days ago
12-76087
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
61-51157
2 months ago
66-35347
66 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
61-45451
2 months ago
117-79387
117 days ago
20-33900
20 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)` (the proof of this is ugly). --- - [x] depends on: #27567 - [x] depends on: #27569 - [ ] depends on: #32245 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-ring-theory awaiting-author blocked-by-other-PR 163/0 Mathlib.lean,Mathlib/RingTheory/Coalgebra/Frobenius.lean 2 19 ['YaelDillies', 'erdOne', 'github-actions', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot', 'themathqueen'] alreadydone
assignee:alreadydone
61-28617
2 months ago
107-47383
107 days ago
28-31303
28 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`). --- - [ ] depends on: #30666 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-number-theory t-algebra blocked-by-other-PR
label:t-algebra$
 101/0 Mathlib/NumberTheory/NumberField/ExistsRamified.lean 1 2 ['github-actions', 'mathlib4-dependent-issues-bot'] nobody
60-73981
2 months ago
60-74000
60 days ago
0-47
47 seconds
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
60-57305
2 months ago
103-74738
103 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
60-37176
2 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
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 4 ['chrisflav', 'erdOne', 'github-actions', 'robin-carlier'] eric-wieser
assignee:eric-wieser
60-27316
2 months ago
60-55419
60 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
60-9260
2 months ago
209-76035
209 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
59-58139
2 months ago
59-66661
59 days ago
93-10641
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
59-56606
2 months ago
59-56607
59 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 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 23 ['eric-wieser', 'gio256', 'github-actions', 'joneugster', 'kim-em', 'leanprover-community-bot-assistant', 'mathlib4-dependent-issues-bot'] joneugster
assignee:joneugster
59-56393
2 months ago
239-33533
239 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
59-52336
2 months ago
129-58808
129 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
59-42266
2 months ago
543-6135
543 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
57-68219
1 month ago
195-13603
195 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
57-68175
1 month ago
159-73079
159 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) [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-differential-geometry merge-conflict awaiting-author 192/21 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 55 ['chrisflav', 'github-actions', 'grunweg', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot', 'sgouezel'] PatrickMassot
assignee:PatrickMassot
57-44367
1 month ago
205-79088
205 days ago
0-1
1 second
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
57-44366
1 month ago
203-45780
203 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
57-44120
1 month ago
154-62350
154 days ago
0-13
13 seconds
32039 HugLycan
author:HugLycan
 feat(Tactic/Positivity): handle non-zeroness in non-orders --- WIP... [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) WIP new-contributor t-meta merge-conflict 618/163 Mathlib/Algebra/Order/AbsoluteValue/Basic.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/Module/Algebra.lean,Mathlib/Tactic/Positivity/Basic.lean,Mathlib/Tactic/Positivity/Core.lean,Mathlib/Tactic/Positivity/Finset.lean,Mathlib/Tactic/Positivity/test_Basic.lean 10 3 ['github-actions', 'mathlib4-merge-conflict-bot'] nobody
56-74673
1 month ago
112-75445
112 days ago
0-16
16 seconds
34132 Paul-Lez
author:Paul-Lez
 feat(Analysis/PDE/Quasilinear/Defs): Add definitions about quasilinear first order PDEs This PR continues the work from #25429. Original PR: https://github.com/leanprover-community/mathlib4/pull/25429 t-analysis 147/0 Mathlib.lean,Mathlib/Analysis/PDE/Quasilinear/Defs.lean 2 1 ['github-actions'] nobody
56-64806
1 month ago
unknown
0-0
0 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'] dagurtomas
assignee:dagurtomas
56-54085
1 month ago
63-33615
63 days ago
16-55121
16 days
34131 Ruben-VandeVelde
author:Ruben-VandeVelde
 fix: update create_deprecated_modules.lean --- This is a wip; I'm hoping someone can pick it up and make sure CI builds it going forward. @adomani @kim-em any takers? [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) please-adopt WIP CI 26/22 scripts/create_deprecated_modules.lean 1 2 ['adomani', 'github-actions'] nobody
55-78800
1 month ago
56-67280
56 days ago
0-1
1 second
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
55-68023
1 month ago
56-64868
56 days ago
0-348
5 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 blocked-by-other-PR merge-conflict new-contributor 160/1 Mathlib.lean,Mathlib/ModelTheory/Topology/Types.lean,Mathlib/ModelTheory/Types.lean,Mathlib/Tactic/Linter/DirectoryDependency.lean 4 8 ['NoneMore', 'anishrajeev', 'github-actions', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot', 'tb65536'] nobody
55-47604
1 month ago
63-61428
63 days ago
10-38484
10 days
32546 anishrajeev
author:anishrajeev
 feat(ModelTheory): Prove compactness of the type space Define the space of types and prove various topological properties of it (zero dimensional, totally separated, compact, baire). The goal is to formalize the proof of the Omitting Types Theorem - [ ] depends on: #32215 merge-conflict t-logic new-contributor 127/1 Mathlib.lean,Mathlib/ModelTheory/Topology/Types.lean,Mathlib/ModelTheory/Types.lean,Mathlib/Tactic/Linter/DirectoryDependency.lean 4 6 ['NoneMore', 'anishrajeev', 'github-actions', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] fpvandoorn
assignee:fpvandoorn
55-47554
1 month ago
95-50250
95 days ago
3-84208
3 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
55-16321
1 month ago
101-55094
101 days ago
41-5126
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
54-77817
1 month ago
54-76167
54 days ago
0-1996
33 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
53-68889
1 month ago
53-68889
53 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'] dagurtomas
assignee:dagurtomas
53-55104
1 month ago
53-55104
53 days ago
54-22055
54 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
label:t-algebra$
 4/0 Mathlib/Algebra/Order/Group/Defs.lean 1 8 ['Garmelon', 'Vierkantor', 'artie2000', 'github-actions', 'leanprover-radar'] eric-wieser
assignee:eric-wieser
53-52163
1 month ago
53-52163
53 days ago
40-42357
40 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
53-51362
1 month ago
55-32798
55 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
53-47399
1 month ago
127-12444
127 days ago
74-62390
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
53-39225
1 month ago
unknown
0-0
0 seconds
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 58/19 Mathlib/Tactic/Linter/TextBased.lean,scripts/lint-style.lean 2 20 ['Vierkantor', 'adomani', 'github-actions', 'grunweg', 'joneugster', 'leanprover-community-bot-assistant', 'mathlib4-dependent-issues-bot'] joneugster
assignee:joneugster
52-76128
1 month ago
304-50461
304 days ago
43-17409
43 days
34129 idontgetoutmuch
author:idontgetoutmuch
 feat: define Ehresmann connections --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) awaiting-author t-differential-geometry new-contributor 90/0 Mathlib.lean,Mathlib/Geometry/Manifold/EhresmannConnection.lean 2 5 ['github-actions', 'grunweg', 'idontgetoutmuch', 'metakunt'] nobody
52-72912
1 month ago
56-51798
56 days ago
0-1188
19 minutes
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
52-69670
1 month 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
51-59780
1 month ago
51-63865
51 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
50-82745
1 month ago
54-50350
54 days ago
0-278
4 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
50-39008
1 month 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
50-19483
1 month ago
50-24863
50 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
49-72439
1 month 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 8/0 Mathlib/GroupTheory/SpecificGroups/Cyclic.lean 1 8 ['erdOne', 'faenuccio', 'github-actions', 'leanprover-radar', 'tb65536'] tb65536
assignee:tb65536
49-59881
1 month ago
50-33264
50 days ago
4-69251
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
49-56233
1 month ago
109-65035
109 days ago
6-17372
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', 'leanprover-community-mathlib4-bot', 'urkud'] nobody
49-33709
1 month ago
670-34703
670 days ago
0-15256
4 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 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 2 ['eric-wieser', 'github-actions'] nobody
48-48045
1 month ago
unknown
0-0
0 seconds
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
48-43887
1 month 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
48-31314
1 month ago
87-28602
87 days ago
0-5
5 seconds
34361 grunweg
author:grunweg
 chore: rename comp' to fun_comp a few more times; use to_fun to autog… …enerate -------- - [ ] 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 blocked-by-other-PR 24/40 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 2 ['github-actions', 'mathlib4-dependent-issues-bot'] nobody
48-28213
1 month ago
48-30970
48 days ago
3-29244
3 days
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
48-20587
1 month ago
unknown
0-0
0 seconds
34506 kbuzzard
author:kbuzzard
 perf(RingTheory/Extension/Generators): universe switch --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) WIP t-ring-theory 1/1 Mathlib/RingTheory/Extension/Generators.lean 1 3 ['github-actions', 'kbuzzard', 'leanprover-radar'] nobody
48-17307
1 month ago
48-18524
48 days ago
0-1
1 second
33963 gasparattila
author:gasparattila
 feat(Topology/UniformSpace/Closeds): completeness of `(Nonempty)Compacts` This PR generalizes the completeness result of `NonemptyCompacts` from metric spaces to uniform spaces. --- - [x] depends on: #34036 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-topology 71/8 Mathlib/Topology/MetricSpace/Closeds.lean,Mathlib/Topology/UniformSpace/Closeds.lean 2 3 ['github-actions', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] PatrickMassot
assignee:PatrickMassot
47-64895
1 month ago
47-64913
47 days ago
58-54928
58 days
34268 gasparattila
author:gasparattila
 feat(Topology/Sets): continuity of operations on `(Nonempty)Compacts` --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-topology 144/17 Mathlib/Topology/Sets/Compacts.lean,Mathlib/Topology/Sets/VietorisTopology.lean,Mathlib/Topology/UniformSpace/Closeds.lean 3 2 ['github-actions', 'mathlib4-merge-conflict-bot'] PatrickMassot
assignee:PatrickMassot
47-64236
1 month ago
47-64254
47 days ago
53-35644
53 days
34270 gasparattila
author:gasparattila
 feat(Topology/UniformSpace/Closeds): `(Nonempty)Compacts.toCloseds` is a closed embedding --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-topology 36/35 Mathlib/Topology/MetricSpace/Closeds.lean,Mathlib/Topology/UniformSpace/Closeds.lean 2 2 ['github-actions', 'mathlib4-merge-conflict-bot'] PatrickMassot
assignee:PatrickMassot
47-63744
1 month ago
47-63763
47 days ago
53-34787
53 days
34276 gasparattila
author:gasparattila
 feat(Topology/Sets): discreteness of `(Nonempty)Compacts` --- - [ ] 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 164/17 Mathlib/Topology/Sets/Compacts.lean,Mathlib/Topology/Sets/VietorisTopology.lean,Mathlib/Topology/UniformSpace/Closeds.lean 3 3 ['github-actions', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
47-60299
1 month ago
53-29377
53 days ago
0-1852
30 minutes
34273 gasparattila
author:gasparattila
 feat(Topology/Sets): finite sets are dense in `(Nonempty)Compacts` --- - [ ] depends on: #34266 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-topology blocked-by-other-PR 182/0 Mathlib/Topology/Bases.lean,Mathlib/Topology/Sets/VietorisTopology.lean 2 3 ['github-actions', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
47-60219
1 month ago
53-33686
53 days ago
0-1250
20 minutes
34278 gasparattila
author:gasparattila
 feat(Topology/Sets): connectedness of `NonemptyCompacts` --- - [ ] 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 434/17 Mathlib/Topology/Bases.lean,Mathlib/Topology/Sets/Compacts.lean,Mathlib/Topology/Sets/VietorisTopology.lean,Mathlib/Topology/UniformSpace/Closeds.lean 4 3 ['github-actions', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
47-59625
1 month ago
53-29379
53 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 493/17 Mathlib/Topology/Bases.lean,Mathlib/Topology/Sets/Compacts.lean,Mathlib/Topology/Sets/VietorisTopology.lean,Mathlib/Topology/UniformSpace/Closeds.lean 4 3 ['github-actions', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
47-57363
1 month ago
53-29382
53 days ago
0-235
3 minutes
34275 gasparattila
author:gasparattila
 feat(Topology/Sets): topological properties of `(Nonempty)Compacts.map` --- - [ ] 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 225/17 Mathlib/Topology/Sets/Compacts.lean,Mathlib/Topology/Sets/VietorisTopology.lean,Mathlib/Topology/UniformSpace/Closeds.lean 3 3 ['github-actions', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
47-57296
1 month ago
53-29375
53 days ago
0-2099
34 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
47-36230
1 month ago
223-25486
223 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
47-33460
1 month ago
108-50425
108 days ago
8-14810
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 101/2 Mathlib/NumberTheory/Divisors.lean 1 37 ['MichaelStollBayreuth', 'github-actions', 'mathlib4-merge-conflict-bot', 'upobir'] mariainesdff
assignee:mariainesdff
46-86183
1 month ago
224-57385
224 days ago
45-82692
45 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
46-71580
1 month 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 531/0 Mathlib.lean,Mathlib/Combinatorics/Enumerative/Partition/EulerComb.lean 2 5 ['chiyunhsu', 'github-actions', 'tb65536', 'vihdzp'] b-mehta
assignee:b-mehta
46-56981
1 month ago
46-56981
46 days ago
42-22427
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
46-55627
1 month ago
215-23336
215 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
46-46228
1 month ago
46-46389
46 days ago
3-27377
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 77/10 Mathlib/SetTheory/ZFC/Basic.lean,Mathlib/SetTheory/ZFC/Ordinal.lean,Mathlib/SetTheory/ZFC/PSet.lean 3 25 ['Komyyy', 'github-actions', 'mathlib4-merge-conflict-bot', 'staroperator', 'vihdzp'] alreadydone
assignee:alreadydone
46-40633
1 month ago
46-40695
46 days ago
57-86065
57 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
46-34670
1 month ago
46-55534
46 days ago
0-22
22 seconds
34279 grunweg
author:grunweg
 chore: use `to_fun` more We use the new functionality of `to_fun` from #34257 to remove a few more duplicate lemmas. --- - [ ] depends on: #34257 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) blocked-by-other-PR merge-conflict 89/217 Mathlib/Analysis/Analytic/Constructions.lean,Mathlib/Analysis/Calculus/ContDiff/Basic.lean,Mathlib/Analysis/Calculus/Deriv/Pow.lean,Mathlib/Analysis/Calculus/FDeriv/Basic.lean,Mathlib/Analysis/Calculus/FDeriv/Pow.lean,Mathlib/Analysis/Calculus/IteratedDeriv/Lemmas.lean,Mathlib/Geometry/Manifold/VectorBundle/Tangent.lean,Mathlib/Probability/Distributions/Gaussian/Fernique.lean,Mathlib/Tactic/ToFun.lean 9 3 ['github-actions', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
46-30454
1 month ago
53-29380
53 days ago
0-441
7 minutes
33817 FlAmmmmING
author:FlAmmmmING
 fix(Combinatorics/Enumerative/Schroder.lean): Fix the definition and theorem 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 61/39 Mathlib/Combinatorics/Enumerative/Schroder.lean 1 19 ['FlAmmmmING', 'github-actions', 'vihdzp'] awainverse
assignee:awainverse
46-18675
1 month ago
61-7951
61 days ago
65-59363
65 days
34227 stepan2698-cpu
author:stepan2698-cpu
 feat: If sum of densities is at least one, the sumset covers the naturals Proves an outstanding TODO item from Mathlib.Combinatorics.Schnirelmann : shows that if the sum of two densities is at least one, the sumset covers the positive naturals. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-combinatorics new-contributor 51/1 Mathlib/Combinatorics/Schnirelmann.lean 1 3 ['github-actions', 'grunweg', 'kbuzzard'] awainverse
assignee:awainverse
46-18672
1 month ago
54-25047
54 days ago
54-39105
54 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
45-79388
1 month ago
54-63403
54 days ago
2-6824
2 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
45-36923
1 month ago
87-22490
87 days ago
0-7673
2 hours
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$
 594/0 Mathlib.lean,Mathlib/LinearAlgebra/Center.lean,Mathlib/LinearAlgebra/GeneralLinearGroup/Center.lean 3 3 ['github-actions', 'mathlib4-merge-conflict-bot'] nobody
45-36922
1 month ago
80-41877
80 days ago
0-19130
5 hours
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 1579/120 Mathlib.lean,Mathlib/Analysis/Asymptotics/TVS.lean,Mathlib/Analysis/Calculus/ContDiff/Operations.lean,Mathlib/Analysis/Calculus/Deriv/Inverse.lean,Mathlib/Analysis/Calculus/FDeriv/Equiv.lean,Mathlib/Analysis/Calculus/FDeriv/OfCompLeft.lean,Mathlib/Analysis/Calculus/InverseFunctionTheorem/FDeriv.lean,Mathlib/Analysis/Complex/RiemannMapping.lean,Mathlib/Analysis/Complex/UnitDisc/Basic.lean,Mathlib/Analysis/Complex/UnitDisc/Shift.lean,Mathlib/Analysis/Normed/Field/Lemmas.lean,Mathlib/Tactic/Linter/DirectoryDependency.lean,Mathlib/Topology/Algebra/Group/CompactOpen.lean,Mathlib/Topology/Algebra/IsUniformGroup/Basic.lean,Mathlib/Topology/MetricSpace/Algebra.lean,Mathlib/Topology/UniformSpace/LocallyUniformConvergence.lean 16 8 ['SnirBroshi', 'github-actions', 'mathlib4-merge-conflict-bot', 'urkud'] nobody
45-36797
1 month ago
unknown
0-0
0 seconds
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
45-36672
1 month 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
45-32506
1 month ago
45-32157
45 days ago
0-11705
3 hours
26174 grunweg
author:grunweg
 feat: split continuous linear maps We define split linear maps and prove their basic properties. Manually migrated from #23186. --- There are two sorries left. One is `ClosedComplemented.prod`; the other relates to the composition of split maps. Help with both is welcome. [This zulip discussion](https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/Composition.20of.20immersions.20is.20an.20immersion.3A.20infinite-dimensio/with/507300190) contains a proof of the non-trivial sorry. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) WIP help-wanted t-analysis 253/0 Mathlib.lean,Mathlib/Analysis/NormedSpace/HahnBanach/Splits.lean 2 2 ['github-actions', 'mathlib4-merge-conflict-bot'] nobody
45-30384
1 month ago
unknown
0-0
0 seconds
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 13 ['SnirBroshi', 'floor-licker', 'github-actions'] kmill
assignee:kmill
45-18682
1 month ago
58-36371
58 days ago
58-39537
58 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 29 ['MrBrain295', 'Parcly-Taxel', 'Rida-Hamadani', 'github-actions', 'lambda-fairy', 'leanprover-community-bot-assistant'] kmill
assignee:kmill
45-9974
1 month ago
255-8198
255 days ago
72-50365
72 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/Bipartite.lean,Mathlib/Combinatorics/SimpleGraph/Extremal/KovariSosTuran.lean,Mathlib/Combinatorics/SimpleGraph/Extremal/Zarankiewicz.lean,Mathlib/Combinatorics/SimpleGraph/Maps.lean,docs/1000.yaml 6 11 ['SnirBroshi', 'github-actions', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot', 'mitchell-horner'] kmill
assignee:kmill
45-9514
1 month ago
45-12677
45 days ago
37-76910
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
44-82237
1 month ago
unknown
0-0
0 seconds
34257 grunweg
author:grunweg
 feat(Tactic/ToFun): allow configuring the name of the generated declaration This allows removing a few more duplicate lemmas. A few of these lemmas were misnamed (i.e., not using the `fun_` naming convention): we correct this. --- I'm also happy to split the follow-up golfs into a separate PR, if preferred. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-meta awaiting-author merge-conflict 31/53 Mathlib/Analysis/Calculus/ContDiff/Basic.lean,Mathlib/Analysis/Calculus/Deriv/Pow.lean,Mathlib/Analysis/Calculus/FDeriv/Basic.lean,Mathlib/Analysis/Calculus/FDeriv/Pow.lean,Mathlib/Analysis/Calculus/IteratedDeriv/Lemmas.lean,Mathlib/Geometry/Manifold/VectorBundle/Tangent.lean,Mathlib/Probability/Distributions/Gaussian/Fernique.lean,Mathlib/Tactic/ToFun.lean 8 12 ['JovanGerb', 'github-actions', 'grunweg', 'mathlib4-merge-conflict-bot'] JovanGerb
assignee:JovanGerb
44-81184
1 month ago
52-67758
52 days ago
0-52192
14 hours
34106 ADedecker
author:ADedecker
 feat: map a seminorm along a surjective linear map --- - [ ] depends on: #34105 - [ ] depends on: #34104 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) 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 2 ['github-actions', 'mathlib4-dependent-issues-bot'] nobody
44-48617
1 month 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
44-30793
1 month ago
98-31231
98 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
44-29997
1 month ago
170-15582
170 days ago
0-24009
6 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
label:t-algebra$
 270/155 Archive/Wiedijk100Theorems/AbelRuffini.lean,Mathlib/RingTheory/Polynomial/Morse.lean,Mathlib/RingTheory/Polynomial/Selmer.lean 3 7 ['AntoineChambert-Loir', 'github-actions', 'mathlib4-merge-conflict-bot'] nobody
44-29976
1 month ago
247-21693
247 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
44-29870
1 month ago
179-18282
179 days ago
0-1375
22 minutes
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
44-29774
1 month ago
335-21006
335 days ago
0-1017
16 minutes
33520 NoneMore
author:NoneMore
 feat(ModelTheory/ElementarySubstructures): add a variant of Tarski-Vaught test taking sets as input There should exist an `ElementarySubstructure.copy` such that we can directly bundle the set itself instaed of its closure as an elementary substructure. The other direction depends on #33458. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-logic new-contributor 55/0 Mathlib/ModelTheory/ElementarySubstructures.lean 1 3 ['Citronhat', 'NoneMore', 'github-actions'] awainverse
assignee:awainverse
44-18633
1 month ago
72-68254
72 days ago
72-68209
72 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. --- - [ ] 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 blocked-by-other-PR 247/0 Mathlib.lean,Mathlib/Combinatorics/SimpleGraph/Bipartite.lean,Mathlib/Combinatorics/SimpleGraph/Extremal/Zarankiewicz.lean,Mathlib/Combinatorics/SimpleGraph/Maps.lean 4 4 ['b-mehta', 'github-actions', 'mathlib4-dependent-issues-bot', 'mitchell-horner'] nobody
44-8586
1 month ago
45-9767
45 days ago
0-3173
52 minutes
34675 YaelDillies
author:YaelDillies
 feat: comultiplication as a bialgebra hom From Toric --- - [ ] depends on: #32245 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-ring-theory blocked-by-other-PR toric 880/3 Mathlib.lean,Mathlib/RingTheory/Bialgebra/TensorProduct.lean,Mathlib/RingTheory/Coalgebra/CoassocSimps.lean,Mathlib/RingTheory/Coalgebra/TensorProduct.lean,Mathlib/Tactic/Attr/Register.lean,MathlibTest/RingTheory/CoassocSimps.lean 6 2 ['github-actions', 'mathlib4-dependent-issues-bot'] nobody
43-71403
1 month ago
43-72486
43 days ago
0-1
1 second
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
43-69637
1 month ago
143-59340
143 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
43-69624
1 month ago
162-20193
162 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
43-69617
1 month ago
162-25846
162 days ago
0-241
4 minutes
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
label:t-algebra$
 300/2 Mathlib.lean,Mathlib/LinearAlgebra/PiTensorProduct.lean,Mathlib/LinearAlgebra/PiTensorProduct/Set.lean 3 28 ['PrParadoxy', 'dagurtomas', 'eric-wieser', 'github-actions', 'goliath-klein', 'leanprover-radar', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] dagurtomas
assignee:dagurtomas
43-69586
1 month ago
84-46488
84 days ago
10-66980
10 days
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
43-69536
1 month ago
179-15705
179 days ago
0-3467
57 minutes
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 8 ['Hagb', 'Vierkantor', 'github-actions', 'mathlib4-dependent-issues-bot', 'vihdzp'] nobody
43-69489
1 month ago
94-6593
94 days ago
0-137
2 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 4/0 Mathlib/MeasureTheory/Constructions/Polish/Basic.lean 1 9 ['ADedecker', 'LTolDe', 'dupuisf', 'github-actions', 'jcommelin'] PatrickMassot
assignee:PatrickMassot
43-69391
1 month ago
69-53523
69 days ago
11-7507
11 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
label:t-algebra$
 80/52 Mathlib.lean,Mathlib/Algebra/Polynomial/FreeMonic.lean,Mathlib/RingTheory/Polynomial/UniversalFactorizationRing.lean 3 2 ['Ruben-VandeVelde', 'github-actions'] thorimur
assignee:thorimur
43-69266
1 month ago
53-32932
53 days ago
20-81395
20 days
33109 felixpernegger
author:felixpernegger
 feat(Data/Nat/Choose): Binomial inversion This PR adds binomial inversion (also called binomial transform), which is a useful method for proving binomial identities. It is tricky to find direct references to binomial inversion, but for example [this](https://en.wikipedia.org/wiki/Binomial_transform#Binomial_convolution) Wikipedia article mentions it ("The formula"). The first theorem ```alternating_sum_choose_mul_of_alternating_sum_choose_mul``` could be refined (we only need the hypothesis ```h``` up to some point), but this seems to needlessly complicate it. awaiting-author new-contributor t-data 107/0 Mathlib.lean,Mathlib/Data/Nat/Choose/Inversion.lean 2 6 ['dagurtomas', 'felixpernegger', 'github-actions', 'thomaskwaring', 'wwylele'] dagurtomas
assignee:dagurtomas
43-69260
1 month ago
53-50482
53 days ago
33-35408
33 days
24000 YaelDillies
author:YaelDillies
 feat: correspondence between affine group schemes and Hopf algebras Construct `Spec` as a functor from `R`-Hopf algebras to group schemes over `Spec R`, show it is full and faithful and has affine group schemes as essential image. From Toric, FLT Co-authored-by: Andrew Yang Co-authored-by: Michał Mrugała Co-authored-by: Christian Merten --- - [ ] depends on: #34675 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebraic-geometry toric FLT blocked-by-other-PR 127/0 Mathlib/AlgebraicGeometry/GroupScheme/HopfAffine.lean 1 4 ['YaelDillies', 'github-actions', 'kbuzzard', 'mathlib4-dependent-issues-bot'] nobody
43-68554
1 month ago
337-64687
337 days ago
0-1
1 second
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
43-61456
1 month ago
105-33300
105 days ago
0-1609
26 minutes
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
43-61332
1 month ago
140-52778
140 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
43-61093
1 month ago
98-16536
98 days ago
0-27628
7 hours
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
43-60942
1 month ago
185-38099
185 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
43-60925
1 month ago
255-7024
255 days ago
29-66856
29 days
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
43-60868
1 month ago
60-75553
60 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
43-60612
1 month ago
136-42627
136 days ago
0-64677
17 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
43-60099
1 month ago
119-16902
119 days ago
0-150
2 minutes
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 186/1 Mathlib/Combinatorics/SimpleGraph/Bipartite.lean 1 5 ['NickAdfor', 'github-actions', 'jcommelin'] kmill
assignee:kmill
43-59831
1 month ago
45-60728
45 days ago
26-1427
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 `R`-modules `M` and `N` and a set `s` in `M`, `Submodule.dual p s` is the submodule in `N` consisting of all points `y` such that `0 = p x y` for all `x ∈ s`. 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 5 ['github-actions', 'joelriou', 'martinwintermath'] joelriou
assignee:joelriou
43-55868
1 month ago
45-38327
45 days ago
14-81375
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
43-31410
1 month ago
49-13068
49 days ago
0-784
13 minutes
34271 gasparattila
author:gasparattila
 feat(Topology/Sets): second-countability of `(Nonempty)Compacts` --- - [ ] depends on: #34266 - [ ] 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/Bases.lean,Mathlib/Topology/MetricSpace/Closeds.lean,Mathlib/Topology/Sets/Compacts.lean,Mathlib/Topology/Sets/VietorisTopology.lean,Mathlib/Topology/UniformSpace/Closeds.lean 5 4 ['github-actions', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
43-30124
1 month ago
53-36552
53 days ago
0-137
2 minutes
34703 martinwintermath
author:martinwintermath
 Generalizing orthogonalBilin --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor 49/25 Mathlib/Analysis/InnerProductSpace/Orthogonal.lean,Mathlib/LinearAlgebra/QuadraticForm/Basic.lean,Mathlib/LinearAlgebra/SesquilinearForm/Basic.lean 3 1 ['github-actions'] nobody
43-23371
1 month ago
unknown
0-0
0 seconds
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 theorem exists_path_iff_isContained_pathGraph : (∃ (u v : V) (w : G.Path u v), w.val.support.length = n) ↔ pathGraph n ⊑ G := by sorry ``` (the last statement also requires #33121, this PR gives the right-to-left implication and that PR gives the left-to-right) [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-combinatorics 37/1 Mathlib/Combinatorics/SimpleGraph/Hasse.lean 1 9 ['SnirBroshi', 'github-actions', 'vihdzp', 'vlad902'] kmill
assignee:kmill
43-131
1 month ago
54-24547
54 days ago
55-57335
55 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 164/0 Mathlib/Probability/Process/Adapted.lean 1 2 ['CoolRmal', 'github-actions'] nobody
42-74586
1 month ago
42-74635
42 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 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 2 ['github-actions', 'mathlib4-merge-conflict-bot'] nobody
42-73139
1 month ago
139-58456
139 days ago
0-2
2 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
41-38369
1 month ago
111-69709
111 days ago
19-82118
19 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
41-38360
1 month ago
60-62044
60 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
41-38352
1 month 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
41-31859
1 month ago
41-31859
41 days ago
10-7491
10 days
32570 ksenono
author:ksenono
 feat(Combinatorics/SimpleGraph): bipartite subgraphs and vertex-disjoint graphs for Konig's theorem --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-combinatorics new-contributor 22/0 Mathlib/Combinatorics/SimpleGraph/Bipartite.lean,Mathlib/Combinatorics/SimpleGraph/Subgraph.lean 2 19 ['SnirBroshi', 'github-actions', 'jcommelin', 'ksenono', 'vlad902'] kmill
assignee:kmill
41-28442
1 month ago
41-28442
41 days ago
93-64600
93 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
41-11128
1 month ago
41-47981
41 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
40-75241
1 month ago
70-59104
70 days ago
0-412
6 minutes
19860 YaelDillies
author:YaelDillies
 refactor: review the `simps` projections of `OneHom`, `MulHom`, `MonoidHom` Make `simps` generate `coe_concreteHom` rather than`concreteHom_apply`. From FLT --- In fact, I would love to have both the `coe_` and `_apply` projections simultaneously and also to not have to specify ` simps (config := .asFn))` every single time we want to generate the `coe_` projection, but `simps ` seems to not be able to do that? cc @fpvandoorn I must say, after four years of working on mathlib, I still don't understand how one is supposed to use `simps`. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) WIP t-algebra
label:t-algebra$
 100/123 Mathlib/Algebra/BigOperators/Group/Multiset/Basic.lean,Mathlib/Algebra/Group/Hom/Defs.lean,Mathlib/Algebra/Group/Subgroup/Defs.lean,Mathlib/Algebra/Group/Submonoid/Operations.lean,Mathlib/Algebra/Group/WithOne/Basic.lean,Mathlib/Algebra/GroupWithZero/WithZero.lean,Mathlib/Algebra/Module/End.lean,Mathlib/GroupTheory/NoncommCoprod.lean 8 12 ['fpvandoorn', 'github-actions', 'leanprover-community-bot-assistant', 'mathlib4-merge-conflict-bot'] nobody
40-52420
1 month ago
461-68983
461 days ago
0-17
17 seconds
21031 YaelDillies
author:YaelDillies
 chore: get rid of generic hom coercions --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) WIP 166/161 Mathlib/Algebra/Group/Equiv/Basic.lean,Mathlib/Algebra/Group/Equiv/Defs.lean,Mathlib/Algebra/Group/Hom/Defs.lean,Mathlib/Algebra/Group/Subgroup/Map.lean,Mathlib/Algebra/Group/Units/Hom.lean,Mathlib/Algebra/GroupWithZero/Hom.lean,Mathlib/Algebra/Order/Hom/Monoid.lean,Mathlib/Algebra/Ring/Hom/Defs.lean,Mathlib/Logic/Equiv/Defs.lean,Mathlib/Order/Hom/Basic.lean,Mathlib/Order/RelIso/Basic.lean,Mathlib/RingTheory/Valuation/Basic.lean 12 18 ['Vierkantor', 'YaelDillies', 'github-actions', 'leanprover-community-bot-assistant', 'mathlib-merge-conflicts', 'mathlib4-merge-conflict-bot', 'urkud'] Vierkantor
assignee:Vierkantor
40-52333
1 month ago
416-36225
416 days ago
0-17
17 seconds
34191 IlPreteRosso
author:IlPreteRosso
 feat(Topology/Algebra/InfiniteSum): Discrete Convolution API 1st PR Defines the very basics of the discrete convolution API. In analogy with [MeasureTheory.Convolution](https://leanprover-community.github.io/mathlib4_docs/Mathlib/Analysis/Convolution.html#MeasureTheory.convolution). Main definitions include - `mulFiber`, `convolution`, `ConvolutionExists`, `ConvolutionExists.add_distrib`, `ConvolutionExistsAt.smul_convolution`, `mulFiber_swapEquiv`, `convolution_comm` RM: - The main docstring is *as is* - Next step is triple sum intrastrcutre + `assoc` theorems for convolution (long) Continues the work from #33411 and #33410 (splitting into shorter PRs, carries over the modifications from previous reviews) t-topology new-contributor 277/0 Mathlib.lean,Mathlib/Topology/Algebra/InfiniteSum/DiscreteConvolution.lean 2 18 ['IlPreteRosso', 'github-actions', 'j-loreaux'] PatrickMassot
assignee:PatrickMassot
40-47548
1 month ago
40-47743
40 days ago
49-49381
49 days
31508 FLDutchmann
author:FLDutchmann
 feat(Tactic): `algebra` tactic. Implement tactic 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. The core of this tactic is used by a larger suite of tactics (see #30374). --- - [x] depends on: #31506 - [ ] depends on: #34734 For full disclosure, most of the lemma statements in `Lemmas.lean` were generated by an LLM. [![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 2484/1163 Mathlib.lean,Mathlib/Tactic.lean,Mathlib/Tactic/Algebra/Basic.lean,Mathlib/Tactic/Algebra/Lemmas.lean,Mathlib/Tactic/Ring/Basic.lean,Mathlib/Tactic/Ring/Common.lean,Mathlib/Tactic/Ring/Compare.lean,Mathlib/Tactic/Ring/RingNF.lean,MathlibTest/Algebra.lean,MathlibTest/ring.lean,scripts/noshake.json 11 18 ['FLDutchmann', 'Vierkantor', 'github-actions', 'mathlib-merge-conflicts', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] Vierkantor
assignee:Vierkantor
40-8833
1 month ago
102-50455
102 days ago
9-83430
9 days
34148 FLDutchmann
author:FLDutchmann
 feat: refactor `ring` to extract common behaviour with `algebra` --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-meta merge-conflict 2489/1107 Mathlib.lean,Mathlib/Tactic.lean,Mathlib/Tactic/Algebra/Basic.lean,Mathlib/Tactic/Algebra/Lemmas.lean,Mathlib/Tactic/Ring/Basic.lean,Mathlib/Tactic/Ring/Common.lean,Mathlib/Tactic/Ring/Compare.lean,Mathlib/Tactic/Ring/RingNF.lean,MathlibTest/Algebra.lean,MathlibTest/ring.lean,scripts/noshake.json 11 6 ['FLDutchmann', 'github-actions', 'leanprover-radar', 'mathlib-merge-conflicts'] nobody
40-6071
1 month ago
unknown
0-0
0 seconds
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
39-77931
1 month ago
75-49561
75 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
39-69268
1 month ago
39-69268
39 days ago
7-50691
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
39-60228
1 month ago
39-60228
39 days ago
20-17046
20 days
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 maintainer-merge 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 11 ['Vierkantor', 'dagurtomas', 'github-actions', 'mathlib4-dependent-issues-bot'] Vierkantor and dagurtomas
assignee:Vierkantor assignee:dagurtomas
39-45919
1 month ago
39-45923
39 days ago
15-81158
15 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
39-34266
1 month ago
42-52406
42 days ago
0-2854
47 minutes
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
38-79240
1 month ago
39-50230
39 days ago
85-51732
85 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`. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) WIP t-algebra t-group-theory
label:t-algebra$
 23/0 Mathlib/Algebra/Group/Subgroup/Basic.lean,Mathlib/Algebra/Group/Subgroup/Map.lean 2 3 ['CoolRmal', 'github-actions'] nobody
38-77766
1 month ago
38-77814
38 days ago
0-36
36 seconds
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/Order/Birkhoff.lean,Mathlib/Order/Quotient.lean 5 28 ['Vierkantor', 'alreadydone', 'github-actions', 'kckennylau', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot', 'vihdzp', 'wwylele'] nobody
38-69316
1 month ago
38-69318
38 days ago
25-9099
25 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
38-67603
1 month ago
38-67603
38 days ago
12-25418
12 days
34182 IlPreteRosso
author:IlPreteRosso
 feat(Data/Finsupp/Single, Data/Finsupp/Indicator): Add set_indicator_singleton, indicator_singleton; golfed single_eq_set_indicator, single_eq_indicator [Mathlib.Data.Finsupp.Single](https://leanprover-community.github.io/mathlib4_docs/Mathlib/Data/Finsupp/Single.html#Finsupp.single) - Add `set_indicator_singleton`, golfed `single_eq_set_indicator` [Mathlib.Data.Finsupp.Indicator](https://leanprover-community.github.io/mathlib4_docs/Mathlib/Data/Finsupp/Indicator.html#Finsupp.indicator_apply) - Add `indicator_singleton`, golfed `single_eq_indicator` Continues the work from #34095 large-import t-data new-contributor 17/17 Mathlib/Data/Finsupp/Indicator.lean,Mathlib/Data/Finsupp/Single.lean 2 29 ['IlPreteRosso', 'eric-wieser', 'github-actions', 'mathlib-bors', 'urkud'] eric-wieser and urkud
assignee:urkud assignee:eric-wieser
38-48459
1 month ago
55-7076
55 days ago
55-15024
55 days
33894 vihdzp
author:vihdzp
 chore: move `Archimedean` to a new `Defs` file I've also moved the most basic theorems (`exists_nat_lt`, etc.) to this file. This greatly decreases the imports needed to use these classes. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra
label:t-algebra$
 119/66 Mathlib.lean,Mathlib/Algebra/Order/Archimedean/Basic.lean,Mathlib/Algebra/Order/Archimedean/Defs.lean,Mathlib/Data/Real/Archimedean.lean 4 4 ['dagurtomas', 'github-actions', 'mathlib4-merge-conflict-bot', 'vihdzp'] dagurtomas
assignee:dagurtomas
38-42931
1 month ago
52-75826
52 days ago
9-31078
9 days
34151 gasparattila
author:gasparattila
 feat(Topology/Sets): product of `Closeds` --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-topology 30/0 Mathlib/Topology/MetricSpace/Closeds.lean,Mathlib/Topology/Sets/Closeds.lean,Mathlib/Topology/Sets/Compacts.lean 3 1 ['github-actions'] PatrickMassot
assignee:PatrickMassot
38-42669
1 month ago
56-38842
56 days ago
56-38797
56 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
38-27550
1 month 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
38-26518
1 month ago
66-71192
66 days ago
26-54054
26 days
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 41 ['Vierkantor', 'erdOne', 'github-actions', 'j-loreaux', 'kbuzzard', 'leanprover-radar', 'mattrobball'] chrisflav
assignee:chrisflav
37-40133
1 month ago
37-40175
37 days ago
8-42588
8 days
34956 kbuzzard
author:kbuzzard
 test: add a file with universe tests Just to keep track of some horrible universe issues in Kaehler.Polynomial. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-ring-theory 266/0 Mathlib/RingTheory/Kaehler/UniverseTest.lean 1 1 ['github-actions'] nobody
37-36920
1 month ago
37-36601
37 days ago
0-397
6 minutes
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
37-17442
1 month ago
37-17442
37 days ago
35-16104
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
37-13154
1 month ago
37-13154
37 days ago
23-8390
23 days
34815 Deep0Thinking
author:Deep0Thinking
 feat(Analysis/SpecialFunctions/ImproperIntegrals): Frullani integral - [ ] 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/IntegralEqImproper.lean,Mathlib/MeasureTheory/Integral/IntervalIntegral/MeanValue.lean,Mathlib/Order/Interval/Set/LinearOrder.lean,Mathlib/Topology/Algebra/GroupWithZero.lean,Mathlib/Topology/Algebra/Monoid.lean 6 6 ['CoolRmal', 'Deep0Thinking', 'github-actions', 'mathlib-dependent-issues', 'sgouezel'] nobody
37-1157
1 month ago
39-62740
39 days ago
1-43880
1 day
34573 Kha
author:Kha
 chore(Analysis/Normed/Lp/SmoothApprox): shake public imports `lake shake --keep-implied --keep-prefix --fix --only Mathlib.Analysis.Normed.Lp.SmoothApprox`, using a dev version of `shake` 7/2 Mathlib/Analysis/Normed/Lp/SmoothApprox.lean,Mathlib/NumberTheory/ModularForms/EisensteinSeries/QExpansion.lean 2 15 ['Garmelon', 'JovanGerb', 'Kha', 'YaelDillies', 'github-actions', 'jcommelin', 'leanprover-radar'] nobody
36-37803
1 month ago
36-53391
36 days ago
10-8979
10 days
34093 YellPika
author:YellPika
 feat(Order/OmegaCompletePartialOrder): add `OmegaCompletePartialOrder` instance for `Option` with basic `ωScottContinuous` lemmas --- - [x] depends on: #33941 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-order new-contributor 297/0 Mathlib.lean,Mathlib/Data/Option/Order.lean,Mathlib/Order/Monotone/Basic.lean,Mathlib/Order/OmegaCompletePartialOrder.lean 4 5 ['YellPika', 'github-actions', 'mathlib-dependent-issues', 'mathlib-merge-conflicts'] pechersky
assignee:pechersky
36-18752
1 month ago
41-1088
41 days ago
41-4007
41 days
34266 gasparattila
author:gasparattila
 feat(Topology/Sets): basis of `(Nonempty)Compacts` --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-topology 147/0 Mathlib/Topology/Bases.lean,Mathlib/Topology/Sets/VietorisTopology.lean 2 2 ['github-actions', 'mathlib4-merge-conflict-bot'] PatrickMassot
assignee:PatrickMassot
36-18750
1 month ago
47-64687
47 days ago
53-41140
53 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
35-73828
1 month ago
255-10669
255 days ago
52-61657
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
35-45551
1 month ago
115-55322
115 days ago
113-64892
113 days
34475 artie2000
author:artie2000
 fix: remove some nolints * Reorder some instance arguments to make particular typeclass searches fail faster --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-ring-theory WIP merge-conflict 5/9 Mathlib/Algebra/MvPolynomial/Basic.lean,Mathlib/RingTheory/Extension/Generators.lean,Mathlib/RingTheory/Flat/FaithfullyFlat/Basic.lean,Mathlib/RingTheory/Valuation/ValuationRing.lean 4 7 ['artie2000', 'github-actions', 'leanprover-radar', 'mathlib-merge-conflicts'] nobody
35-35254
1 month ago
49-16437
49 days ago
0-471
7 minutes
34720 Paul-Lez
author:Paul-Lez
 feat(RingTheory/PowerSeries/Composition): define composition of power series This PR defines the composition of two power series, and adds various pieces of API lemmas (this is mostly fixing up and upstreaming code from [this repo](https://github.com/rmhi/formal_deriv)). This is the first of a series of PRs upstreaming work that was done at the CFT workshop in Oxford last summer, working towards proving some results about the `exp` and `log` power series (and their composition!), and constructing the isomorphism $(\mathfrak{m}_K ^ n, +) \cong (1 + \mathfrak{m}_K ^ n, \times)$ for sufficiently large $n$, where $K$ is a characteristic zero local field. Co-authored-by: Richard Hill Co-authored-by: Calle Sönne --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-ring-theory awaiting-zulip 844/0 Mathlib.lean,Mathlib/RingTheory/PowerSeries/Composition.lean 2 3 ['Paul-Lez', 'github-actions', 'vihdzp'] nobody
35-29000
1 month ago
42-67320
42 days ago
0-10
10 seconds
34756 Hagb
author:Hagb
 feat(Algebra/Order/Monoid/Unbundled/WithTop): `AddEquiv` between `WithBot` It is like `Equiv.withBotCongr` but preserving also addition (`AddEquiv`). --- It is like [`Equiv.withBotCongr`](https://leanprover-community.github.io/mathlib4_docs/find/?pattern=Equiv.withBotCongr#doc) but preserving also addition ([`AddEquiv`](https://leanprover-community.github.io/mathlib4_docs/find/?pattern=AddEquiv#doc)). [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra
label:t-algebra$
 39/0 Mathlib/Algebra/Order/Monoid/Unbundled/WithTop.lean 1 3 ['Hagb', 'github-actions', 'plp127'] mattrobball
assignee:mattrobball
35-18485
1 month ago
39-18875
39 days ago
41-58800
41 days
34808 YaelDillies
author:YaelDillies
 feat(Combinatorics/SimpleGraph): isolated vertices RFC for now. Do you think this is a reasonable definition to have? What should its API be? From ProofBench --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) RFC t-combinatorics 3/0 Mathlib/Combinatorics/SimpleGraph/Basic.lean 1 1 ['github-actions'] kmill
assignee:kmill
35-18480
1 month ago
41-33634
41 days ago
41-33589
41 days
26985 agjftucker
author:agjftucker
 feat(Analysis/Calculus/ImplicitFunction): define implicitFunctionOfProdDomain This PR continues the work from #16743. Original PR: https://github.com/leanprover-community/mathlib4/pull/16743 --- - [x] depends on: #28352 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-analysis new-contributor 269/157 Mathlib.lean,Mathlib/Analysis/Calculus/Implicit.lean,Mathlib/Analysis/Calculus/ImplicitContDiff.lean,Mathlib/Analysis/Calculus/ImplicitFunction/ProdDomain.lean 4 27 ['agjftucker', 'github-actions', 'j-loreaux', 'mathlib-bors', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot', 'winstonyin'] hrmacbeth
assignee:hrmacbeth
34-80611
1 month ago
34-80611
34 days ago
103-12618
103 days
32744 NoneMore
author:NoneMore
 feat(ModelTheory/Definablity): add `DefinableFun` definition and lemmas This PR adds two basic shapes of definable sets and `DefinableFun` definition with relevant lemmas. The main result is `Set.Definable.preimage_of_map` asserting that the preimage of a definable set under a definable map is definable. There are also some tool lemmas derived by the preimage lemma. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor t-logic 147/0 Mathlib/ModelTheory/Definability.lean 1 59 ['NoneMore', 'github-actions', 'mathlib4-merge-conflict-bot', 'staroperator'] awainverse
assignee:awainverse
34-74647
1 month ago
66-84367
66 days ago
94-36586
94 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
34-66409
1 month ago
475-54677
475 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
34-52316
1 month ago
67-75184
67 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
34-33307
1 month ago
280-83265
280 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 - [ ] depends on: #26165 --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) blocked-by-other-PR new-contributor t-measure-probability merge-conflict 916/0 Mathlib.lean,Mathlib/MeasureTheory/VectorMeasure/Integral.lean,Mathlib/MeasureTheory/VectorMeasure/Variation/Defs.lean,Mathlib/MeasureTheory/VectorMeasure/Variation/Equiv.lean,Mathlib/MeasureTheory/VectorMeasure/Variation/Lemmas.lean 5 4 ['github-actions', 'mathlib-merge-conflicts', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
34-33305
1 month ago
254-75572
254 days ago
15-65390
15 days
33463 khwilson
author:khwilson
 feat(Mathlib/Analysis/Polynomial/MahlerMeasure): Mahler Measure for other rings Define `mahlerMeasure'` which allows you specify a norm preserving map `v` from any `NormedRing A` (or more general) to `ℂ`. Also provide wrappers around the main `mahlerMeasure` lemmas that are used for estimation. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor t-analysis awaiting-author 97/3 Mathlib/Analysis/Polynomial/MahlerMeasure.lean,Mathlib/NumberTheory/MahlerMeasure.lean 2 21 ['github-actions', 'j-loreaux', 'khwilson', 'plp127', 'vlad902'] nobody
34-29647
1 month ago
34-31870
34 days ago
0-5062
1 hour
34891 kim-em
author:kim-em
 wip: ConvexSpace constructor from binary convex combinations t-algebra large-import
label:t-algebra$
 3498/0 Mathlib/LinearAlgebra/ConvexSpace.lean,Mathlib/LinearAlgebra/convex_plan.md 2 1 ['github-actions'] nobody
34-25673
1 month ago
unknown
0-0
0 seconds
34481 DAE123456
author:DAE123456
 feat: Ore's Theorem Ore Theorem : Let G be a graph of order n ≥ 3 that satisfies the Ore property. Then G has a Hamilton cycle. t-combinatorics new-contributor 3372/0 Mathlib.lean,Mathlib/Combinatorics/SimpleGraph/Ore.lean 2 25 ['DAE123456', 'LLaurance', 'Ruben-VandeVelde', 'YaelDillies', 'github-actions', 'kim-em', 'tb65536', 'vlad902'] b-mehta
assignee:b-mehta
34-18598
1 month ago
42-73613
42 days ago
46-38682
46 days
34722 GrigorenkoPV
author:GrigorenkoPV
 feat(Data/Finset/RangeDistance): add --- 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 34/0 Mathlib.lean,Mathlib/Algebra/Order/Group/Unbundled/Abs.lean,Mathlib/Data/Finset/RangeDistance.lean 3 4 ['GrigorenkoPV', 'github-actions', 'joneugster', 'plp127'] TwoFX
assignee:TwoFX
34-18594
1 month ago
42-59405
42 days ago
42-61265
42 days
34809 YaelDillies
author:YaelDillies
 feat: induced subgraphs of complete multipartite graphs are complete multipartite From ProofBench --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-combinatorics 4/2 Mathlib/Combinatorics/SimpleGraph/CompleteMultipartite.lean 1 1 ['github-actions'] b-mehta
assignee:b-mehta
34-18590
1 month ago
41-33403
41 days ago
41-33358
41 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
34-5680
1 month ago
unknown
0-0
0 seconds
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 12 ['PatrickMassot', 'github-actions', 'grunweg', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot', 'urkud'] ADedecker
assignee:ADedecker
34-2746
1 month ago
34-41070
34 days ago
36-2785
36 days
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
33-85135
1 month ago
95-81180
95 days ago
15-82816
15 days
28499 yoh-tanimoto
author:yoh-tanimoto
 feat(MeasureTheory/VectorMeasure): add integral of a vector-valued function against a vector measure add `VectorMeasureWithPairing.integral` for normed vector spaces `E`, `F`, a Banach space `G` , a continuous linear pairing `B : E →L[ℝ] F →L[ℝ] → G` and an `F`-valued vector measure `μ`, which should be informally written as `∫ B (f x) ∂μ x`. motivation: there are natural vector measures such as signed measures and complex measures, and their integrals appear naturally e.g. in a proof of the spectral theorem for general bounded normal operators on a Hilbert space. - [ ] depends on: #26160 for the definition and lemmas about the total variation of a vector measure. blocked-by-other-PR t-measure-probability merge-conflict 668/0 Mathlib.lean,Mathlib/MeasureTheory/VectorMeasure/Integral.lean,Mathlib/MeasureTheory/VectorMeasure/Variation/Defs.lean,Mathlib/MeasureTheory/VectorMeasure/Variation/Lemmas.lean 4 4 ['github-actions', 'mathlib-merge-conflicts', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
33-85011
1 month ago
213-26225
213 days ago
0-491
8 minutes
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
33-85009
1 month ago
208-60511
208 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 maintainer-merge awaiting-author 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
33-67747
1 month ago
33-67747
33 days ago
33-85043
33 days
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 submersions. t-differential-geometry new-contributor 596/0 Mathlib.lean,Mathlib/Geometry/Manifold/Submersion.lean 2 2 ['github-actions'] grunweg
assignee:grunweg
33-55014
1 month ago
33-56788
33 days ago
33-58158
33 days
32845 jonasvanderschaaf
author:jonasvanderschaaf
 feat(CategoryTheory): `GrothendieckTopology.yoneda` preserves certain (co)limits We prove that if every `J`-sheaf preserves limits of shape `Kᵒᵖ`, then `J.yoneda` preserves colimits of shape `K`, and the dual statement. We specialize to the case of finite products, and deduce that the inclusion of light profinite sets in light condensed sets preserves finite coproducts From [LeanCondensed](https://github.com/dagurtomas/LeanCondensed) --- Co-authored-by: Dagur Asgeirsson [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor t-category-theory t-condensed large-import awaiting-author 107/5 Mathlib.lean,Mathlib/CategoryTheory/Limits/Preserves/Shapes/Products.lean,Mathlib/CategoryTheory/Sites/PreservesLimits.lean,Mathlib/Condensed/Functors.lean,Mathlib/Condensed/Light/Functors.lean 5 5 ['github-actions', 'jonasvanderschaaf', 'robin-carlier'] nobody
33-47979
1 month ago
45-75411
45 days ago
8-53205
8 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
33-36796
1 month 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
33-35666
1 month ago
61-50770
61 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
33-35537
1 month ago
53-67415
53 days ago
0-15155
4 hours
34855 staroperator
author:staroperator
 feat(Order): use `to_dual` for `PFilter` We can get rid of the whole `PFilter` file now. --- - [ ] depends on: #34820 --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) file-removed large-import blocked-by-other-PR merge-conflict 361/268 Mathlib.lean,Mathlib/Data/Finset/Lattice/Fold.lean,Mathlib/Order/Atoms.lean,Mathlib/Order/BooleanAlgebra/Basic.lean,Mathlib/Order/BooleanAlgebra/Defs.lean,Mathlib/Order/Cofinal.lean,Mathlib/Order/CompleteLattice/Basic.lean,Mathlib/Order/CompleteLattice/Defs.lean,Mathlib/Order/ConditionallyCompleteLattice/Defs.lean,Mathlib/Order/Heyting/Basic.lean,Mathlib/Order/Ideal.lean,Mathlib/Order/Interval/Set/Basic.lean,Mathlib/Order/PFilter.lean,Mathlib/Order/PrimeIdeal.lean,Mathlib/Order/UpperLower/CompleteLattice.lean,Mathlib/Order/UpperLower/Principal.lean,Mathlib/Order/ZornAtoms.lean,Mathlib/RingTheory/IdealFilter/Basic.lean,Mathlib/Tactic/Translate/ToDual.lean 19 3 ['github-actions', 'mathlib-dependent-issues', 'mathlib-merge-conflicts'] nobody
33-35162
1 month ago
unknown
0-0
0 seconds
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 45 ['alreadydone', 'chrisflav', 'erdOne', 'eric-wieser', 'github-actions', 'mathlib4-merge-conflict-bot', 'ocfnash', 'xyzw12345'] mattrobball
assignee:mattrobball
33-34607
1 month ago
121-46516
121 days ago
72-63874
72 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
33-26811
1 month ago
38-3859
38 days ago
0-562
9 minutes
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
33-22514
1 month ago
33-38551
33 days ago
27-814
27 days
34994 bwangpj
author:bwangpj
 feat: Countable.of_module_finite --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra large-import FLT
label:t-algebra$
 7/0 Mathlib/LinearAlgebra/Countable.lean 1 3 ['bwangpj', 'eric-wieser', 'github-actions'] eric-wieser
assignee:eric-wieser
33-11993
1 month ago
36-36856
36 days ago
36-36811
36 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
32-64199
1 month ago
77-56746
77 days ago
5-47362
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
32-41848
1 month ago
32-41849
32 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
32-28889
1 month ago
37-18209
37 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 8 ['SnirBroshi', 'github-actions', 'ksenono', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot', 'vlad902'] nobody
32-12799
1 month ago
88-81855
88 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
31-68364
1 month ago
unknown
0-0
0 seconds
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
31-65838
1 month ago
243-71442
243 days ago
0-21
21 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
31-62966
1 month ago
32-23795
32 days ago
7-49555
7 days
32807 WilliamCoram
author:WilliamCoram
 feat: Define the Gauss norm for MvPowerSeries We adjust the current definition for Gauss norm on power series to work for multivariate power series. If this seems acceptable I can refactor the single variable case. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-ring-theory new-contributor 124/0 Mathlib.lean,Mathlib/RingTheory/MvPowerSeries/GaussNorm.lean 2 25 ['WilliamCoram', 'erdOne', 'fbarroero', 'github-actions', 'mathlib4-merge-conflict-bot', 'vihdzp'] alreadydone
assignee:alreadydone
31-59032
1 month ago
31-59098
31 days ago
44-66915
44 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 blocked-by-other-PR 69/2 Mathlib/Combinatorics/SimpleGraph/Circulant.lean 1 2 ['github-actions', 'mathlib-dependent-issues'] nobody
31-57447
1 month ago
31-57448
31 days ago
0-947
15 minutes
34799 vlad902
author:vlad902
 feat(SimpleGraph): the cycle graph and complete graph are Hamiltonian --- - [ ] depends on: #34797 - [ ] depends on: #35255 [![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 3 ['github-actions', 'mathlib-dependent-issues', 'mathlib-merge-conflicts'] nobody
31-57375
1 month ago
41-37450
41 days ago
0-144
2 minutes
31560 AntoineChambert-Loir
author:AntoineChambert-Loir
 feat(Topology/Sion): the minimax theorem of von Neumann - Sion Prove `Sion.exists_isSaddlePointOn` : Let X and Y be convex subsets of topological vector spaces E and F, X being moreover compact, and let f : X × Y → ℝ be a function such that - for all x, f(x, ⬝) is upper semicontinuous and quasiconcave - for all y, f(⬝, y) is lower semicontinuous and quasiconvex Then inf_x sup_y f(x,y) = sup_y inf_x f(x,y). The classical case of the theorem assumes that f is continuous, f(x, ⬝) is concave, f(⬝, y) is convex. As a particular case, one get the von Neumann theorem where f is bilinear and E, F are finite dimensional. We follow the proof of Komiya (1988). ## Remark on implementation * The essential part of the proof holds for a function `f : X → Y → β`, where `β` is a complete dense linear order. * We have written part of it for just a dense linear order, * On the other hand, if the theorem holds for such `β`, it must hold for any linear order, for the reason that any linear order embeds into a complete dense linear order. However, this result does not seem to be known to Mathlib. * When `β` is `ℝ`, one can use `Real.toEReal` and one gets a proof for `ℝ`. ## TODO Give particular important cases (eg, bilinear maps in finite dimension). Co-authored with @ADedecker --- - [x] depends on: #31548 - [x] depends on: #31547 - [x] depends on: #31558 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-topology 733/0 Mathlib.lean,Mathlib/Data/EReal/Basic.lean,Mathlib/Topology/Semicontinuity/Basic.lean,Mathlib/Topology/Sion.lean,docs/references.bib 5 10 ['AntoineChambert-Loir', 'github-actions', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot', 'riccardobrasca', 'thorimur'] dwrensha and kmill
assignee:kmill assignee:dwrensha
31-31627
1 month ago
31-31627
31 days ago
92-71235
92 days
34069 artie2000
author:artie2000
 feat(Algebra/Order/Algebra): algebra is ordered iff inclusion map is monotone * Prove that an extension of ordered semirings forms an ordered algebra iff the inclusion map is injective * Reorganise section variables for clarity The typeclass `PartialOrder α` in `IsOrderedModule.of_algebraMap_mono` can be generalised to `Preorder α`. This has no mathematical application and all the other lemmas are proved over a partially ordered type, so this generalisation was not made. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra t-order
label:t-algebra$
 18/7 Mathlib/Algebra/Order/Algebra.lean 1 1 ['github-actions'] pechersky
assignee:pechersky
31-25743
1 month ago
57-30279
57 days ago
57-32232
57 days
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 52/1 Mathlib/Data/Finset/Powerset.lean,Mathlib/Data/Fintype/Pi.lean,Mathlib/Logic/Equiv/Fintype.lean 3 25 ['DavidLedvinka', 'b-mehta', 'eric-wieser', 'github-actions', 'joneugster', 'pfaffelh'] pechersky
assignee:pechersky
31-18766
1 month ago
39-22292
39 days ago
42-35673
42 days
34820 staroperator
author:staroperator
 feat(Order/Ideal): more results on order ideals Some iffs, closure of finite supremum, and that every proper ideal is contained in a maximal ideal. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-order large-import 79/5 Mathlib/Order/Ideal.lean 1 5 ['bryangingechen', 'github-actions', 'leanprover-radar', 'staroperator'] pechersky
assignee:pechersky
31-18765
1 month ago
34-23348
34 days ago
40-69233
40 days
35182 sgouezel
author:sgouezel
 test: experiment with branch with footguns --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) 379/183 Mathlib/Algebra/AddConstMap/Basic.lean,Mathlib/Algebra/Algebra/Hom.lean,Mathlib/Algebra/Algebra/NonUnitalHom.lean,Mathlib/Algebra/Algebra/Unitization.lean,Mathlib/Algebra/Category/Grp/Kernels.lean,Mathlib/Algebra/Colimit/DirectLimit.lean,Mathlib/Algebra/Lie/Extension.lean,Mathlib/Algebra/Lie/Submodule.lean,Mathlib/Algebra/Module/Congruence/Defs.lean,Mathlib/Algebra/Module/Equiv/Basic.lean,Mathlib/Algebra/Module/LinearMap/Defs.lean,Mathlib/Algebra/Module/Presentation/RestrictScalars.lean,Mathlib/Algebra/Module/Projective.lean,Mathlib/Algebra/Module/SnakeLemma.lean,Mathlib/Algebra/MonoidAlgebra/Grading.lean,Mathlib/Algebra/Order/Hom/Monoid.lean,Mathlib/Algebra/Order/Ring/WithTop.lean,Mathlib/Algebra/Ring/CompTypeclasses.lean,Mathlib/Algebra/Star/StarAlgHom.lean,Mathlib/Algebra/Star/TensorProduct.lean,Mathlib/AlgebraicTopology/SimplicialSet/Degenerate.lean,Mathlib/Analysis/CStarAlgebra/ContinuousFunctionalCalculus/Unital.lean,Mathlib/Analysis/Distribution/ContDiffMapSupportedIn.lean,Mathlib/Analysis/InnerProductSpace/OfNorm.lean,Mathlib/Analysis/Normed/Module/Basic.lean,Mathlib/Analysis/Normed/Unbundled/InvariantExtension.lean,Mathlib/CategoryTheory/Limits/ConcreteCategory/WithAlgebraicStructures.lean,Mathlib/CategoryTheory/Limits/Types/Coproducts.lean,Mathlib/CategoryTheory/Sites/ConcreteSheafification.lean,Mathlib/CategoryTheory/Yoneda.lean,Mathlib/Combinatorics/Enumerative/IncidenceAlgebra.lean,Mathlib/Computability/Halting.lean,Mathlib/Data/DFinsupp/Lex.lean,Mathlib/Data/Finset/Image.lean,Mathlib/Data/Finset/Lattice/Fold.lean,Mathlib/Data/Finset/Max.lean,Mathlib/Data/Finset/PiInduction.lean,Mathlib/Data/Matrix/Mul.lean,Mathlib/Data/Nat/Cast/SetInterval.lean,Mathlib/Geometry/Manifold/IsManifold/Basic.lean,Mathlib/GroupTheory/GroupAction/Hom.lean,Mathlib/GroupTheory/PresentedGroup.lean,Mathlib/LinearAlgebra/Finsupp/Defs.lean,Mathlib/LinearAlgebra/FreeModule/Basic.lean,Mathlib/LinearAlgebra/TensorAlgebra/Basic.lean,Mathlib/LinearAlgebra/TensorProduct/Graded/Internal.lean,Mathlib/NumberTheory/Dioph.lean,Mathlib/Order/CompleteLattice/PiLex.lean,Mathlib/Order/Hom/Basic.lean,Mathlib/Order/Hom/WithTopBot.lean,Mathlib/Order/KrullDimension.lean,Mathlib/Order/PiLex.lean,Mathlib/Order/RelIso/Set.lean,Mathlib/Order/SuccPred/Archimedean.lean,Mathlib/Order/UpperLower/Closure.lean,Mathlib/RepresentationTheory/Basic.lean,Mathlib/RepresentationTheory/Subrepresentation.lean,Mathlib/RingTheory/AdjoinRoot.lean,Mathlib/RingTheory/Ideal/Nonunits.lean,Mathlib/RingTheory/IdealFilter/Topology.lean,Mathlib/RingTheory/Kaehler/Basic.lean,Mathlib/RingTheory/KrullDimension/Polynomial.lean,Mathlib/RingTheory/LocalProperties/Projective.lean,Mathlib/RingTheory/MvPowerSeries/LinearTopology.lean,Mathlib/SetTheory/Ordinal/Basic.lean,Mathlib/SetTheory/ZFC/Class.lean,Mathlib/Topology/Algebra/Category/ProfiniteGrp/Limits.lean,Mathlib/Topology/Algebra/Module/UniformConvergence.lean,Mathlib/Topology/Algebra/StarSubalgebra.lean,Mathlib/Topology/Category/Profinite/Product.lean,Mathlib/Topology/Category/TopCat/Basic.lean,Mathlib/Topology/Category/TopCat/Limits/Products.lean,Mathlib/Topology/Category/TopCat/ULift.lean,Mathlib/Topology/EMetricSpace/PairReduction.lean 74 10 ['eric-wieser', 'sgouezel'] nobody
31-7027
1 month ago
32-64173
32 days ago
0-16
16 seconds
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
30-45346
1 month ago
40-64603
40 days ago
6-49759
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
30-32410
1 month ago
38-55783
38 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
30-30985
1 month ago
38-53973
38 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/) 220/4 Archive/Imo/Imo2010Q5.lean,Mathlib/Probability/Distributions/Gaussian/HasGaussianLaw/Basic.lean,Mathlib/RingTheory/QuasiFinite/Weakly.lean,Mathlib/Tactic/Linter/EmptyLine.lean,scripts/demote_docstring_headers.py,scripts/find_docstring_headers.py 6 6 ['github-actions', 'mathlib4-merge-conflict-bot'] nobody
30-29817
1 month ago
unknown
0-0
0 seconds
30900 vihdzp
author:vihdzp
 feat: run-length encoding --- - [x] depends on: #30898 Moved from #17105. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-data 167/0 Mathlib.lean,Mathlib/Data/List/RunLength.lean,Mathlib/Data/List/SplitBy.lean 3 5 ['github-actions', 'mathlib-dependent-issues', 'mathlib4-merge-conflict-bot', 'plp127'] TwoFX
assignee:TwoFX
30-18759
1 month ago
34-22096
34 days ago
34-22630
34 days
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 5 ['erdOne', 'github-actions', 'urkud'] erdOne
assignee:erdOne
30-18566
1 month ago
79-32962
79 days ago
4-57005
4 days
34948 joneugster
author:joneugster
 feat(scripts/autolabel): add option to configure number of applied labels add option to change the maximum number of labels the script can apply simultaneously. This does not change the behaviour of the script. The option remains at `1`, but it prepares for potential future adjustments. factored out from: #34066 --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) CI 13/9 scripts/autolabel.lean 1 2 ['github-actions', 'mathlib-merge-conflicts'] adomani
assignee:adomani
30-18478
1 month ago
30-18498
30 days ago
31-31567
31 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
30-18459
1 month ago
89-5848
89 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
30-17630
1 month ago
343-50296
343 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
30-10538
1 month 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
30-10537
1 month ago
363-73437
363 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
30-10537
1 month ago
360-76428
360 days ago
0-67928
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
30-10536
1 month ago
361-57102
361 days ago
0-801
13 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
29-80008
1 month ago
437-67524
437 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
29-73653
1 month ago
81-41478
81 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
29-67307
1 month ago
29-67375
29 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
29-65451
1 month ago
29-65522
29 days ago
0-1
1 second
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.) --- - [ ] depends on: #27898 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-linter awaiting-CI 339/20 Mathlib/Algebra/Order/Hom/Basic.lean,Mathlib/Algebra/Polynomial/EraseLead.lean,Mathlib/Algebra/Polynomial/Inductions.lean,Mathlib/Algebra/Polynomial/Laurent.lean,Mathlib/CategoryTheory/Bicategory/NaturalTransformation/Oplax.lean,Mathlib/CategoryTheory/ConcreteCategory/Basic.lean,Mathlib/CategoryTheory/Enriched/Opposite.lean,Mathlib/CategoryTheory/Filtered/Basic.lean,Mathlib/CategoryTheory/Monoidal/Category.lean,Mathlib/CategoryTheory/Monoidal/Functor.lean,Mathlib/CategoryTheory/Monoidal/Limits.lean,Mathlib/CategoryTheory/NatIso.lean,Mathlib/Combinatorics/Configuration.lean,Mathlib/Data/Fin/Basic.lean,Mathlib/Data/Finsupp/MonomialOrder.lean,Mathlib/Data/Finsupp/MonomialOrder/DegLex.lean,Mathlib/Data/List/EditDistance/Defs.lean,Mathlib/Data/PNat/Xgcd.lean,Mathlib/Data/Part.lean,Mathlib/Geometry/Manifold/LocalDiffeomorph.lean,Mathlib/GroupTheory/GroupAction/MultiplePrimitivity.lean,Mathlib/MeasureTheory/Function/AEEqOfIntegral.lean,Mathlib/NumberTheory/RamificationInertia/Basic.lean,Mathlib/Order/Filter/Partial.lean,Mathlib/Order/Interval/Finset/Defs.lean,Mathlib/RingTheory/DividedPowers/Basic.lean,Mathlib/Tactic/ComputeDegree.lean,Mathlib/Tactic/FunProp/Decl.lean,Mathlib/Tactic/FunProp/Theorems.lean,Mathlib/Tactic/FunProp/Types.lean,Mathlib/Tactic/Linter/DocString.lean,Mathlib/Tactic/MinImports.lean,Mathlib/Tactic/MoveAdd.lean,Mathlib/Tactic/RewriteSearch.lean,Mathlib/Tactic/ToAdditive/Frontend.lean,MathlibTest/DocString.lean,MathlibTest/slow_simp.lean 37 5 ['github-actions', 'mathlib-dependent-issues', 'mathlib4-merge-conflict-bot'] nobody
29-62567
1 month ago
225-66242
225 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
29-57395
1 month ago
678-56595
678 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
29-57223
1 month 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 2/3 Mathlib/Data/Fin/Embedding.lean 1 3 ['github-actions', 'mathlib4-merge-conflict-bot', 'urkud'] nobody
29-53844
1 month ago
176-62312
176 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
29-50807
1 month ago
55-80471
55 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
29-50554
1 month ago
53-56414
53 days ago
107-61660
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
29-49570
1 month ago
29-49570
29 days ago
0-2935
48 minutes
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
29-49445
1 month 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
29-49315
1 month ago
31-41771
31 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
29-42838
1 month ago
179-54614
179 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
29-38461
1 month ago
176-72289
176 days ago
20-70133
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 54/3 Mathlib/Tactic/Linter/Style.lean,MathlibTest/LintStyle.lean 2 2 ['github-actions'] nobody
29-37106
1 month ago
29-65742
29 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
29-36726
1 month ago
29-63842
29 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
29-34112
1 month ago
172-76597
172 days ago
0-1
1 second
35152 j-loreaux
author:j-loreaux
 feat: add missing API for `lp E p` The API for `lp` is significantly underdeveloped. This PR attempts to rectify some of the shortcomings. In particular, we provide: + some missing tools for `Memℓp`, notably `memℓp_norm_iff` and `Memℓp.mono`. + some improved docstrings and more uniform notation for the non-dependent case; note that we also *remove* the notation `ℓ^∞(ι)` for `lp (fun _ : ι ↦ ℝ) ∞` on the basis that there are other choices besides `ℝ` which would make at least as much sense here, including `ℂ`. + bundled version of maps (evaluation, inclusion as a linear map, summation in `ℓ¹`) as well as cleaning-up a few other odds and ends. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-analysis 189/26 Mathlib/Analysis/InnerProductSpace/l2Space.lean,Mathlib/Analysis/Normed/Lp/lpSpace.lean,Mathlib/Topology/MetricSpace/Kuratowski.lean 3 1 ['github-actions'] sgouezel
assignee:sgouezel
29-18751
1 month ago
33-28860
33 days ago
33-28815
33 days
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
28-67742
1 month ago
99-64322
99 days ago
0-101
1 minute
35414 joneugster
author:joneugster
 feat(Cache): Allow arguments of the form `Mathlib.Data.+` which correspond to a folder but not a file This PR continues the work from #21838. Original PR: https://github.com/leanprover-community/mathlib4/pull/21838 CI t-meta 74/31 Cache/IO.lean,Cache/Main.lean 2 2 ['github-actions', 'joneugster'] eric-wieser
assignee:eric-wieser
28-47523
1 month ago
28-48347
28 days ago
28-48302
28 days
35413 joneugster
author:joneugster
 fix(Util/CountHeartbeats): move elaboration in #count_heartbeats inside a namespace This PR continues the work from #21182. Original PR: https://github.com/leanprover-community/mathlib4/pull/21182 t-meta 73/6 Mathlib/Util/CountHeartbeats.lean,MathlibTest/CountHeartbeats.lean 2 3 ['github-actions', 'joneugster', 'mathlib-bors'] adomani
assignee:adomani
28-46605
1 month ago
28-48419
28 days ago
28-48374
28 days
16215 adomasbaliuka
author:adomasbaliuka
 feat(Tactic/Linter): lint unwanted unicode Add a text-based style linter that checks all unicode characters. - Only allow whitelisted characters, with a suggestion to add the flagged character to the whitelist - Some characters are specified to use emoji-variant or text-variant. The linter ensures these variant-selectors only appear in the correct places and provides an auto-fix to clean them up. --- Discussed at [Zulip](https://leanprover.zulipchat.com/#narrow/stream/287929-mathlib4/topic/Whitelist.20for.20Unicode.3F/near/448721083) The current proposal checks each character against a whitelist. There is also the question of what the whitelist should contain. A reasonable whitelist might be "all unicode currently in Mathlib" ∪ [Wikipedia/Mathematical_operators_and_symbols_in_Unicode](https://en.wikipedia.org/wiki/Mathematical_operators_and_symbols_in_Unicode) ∪ [EdAyers/mathlib3/docs/unicode.md](https://github.com/EdAyers/mathlib/blob/fb5c2ffe917049959597b0a93b872e91f4004922/docs/unicode.md). Currently implemented is a subset of this list closer to what's currently present in mathlib. - [x] depends on: #17068 - [x] depends on: #17116 - [x] depends on: #17129 (part 1 of this PR) - ~depends on #34719 (part 1 of this PR)~ - ~depends on: #17131 (part 2 of this PR)~ (obsolete) - [x] depends on: #34022 (part 2 of this PR) - Future note: @adomasbaliuka says: "we might add something to the Mathlib 4 docs about this as well?" [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-linter 462/15 Mathlib/GroupTheory/GroupExtension/Defs.lean,Mathlib/Tactic/Linter/TextBased.lean,Mathlib/Tactic/Linter/UnicodeLinter.lean,Mathlib/Tactic/Widget/Calc.lean,Mathlib/Tactic/Widget/CongrM.lean,Mathlib/Tactic/Widget/Conv.lean,Mathlib/Tactic/Widget/GCongr.lean,Mathlib/Topology/ContinuousFunction/Weierstrass.lean,test/LintStyle.lean 9 51 ['adomasbaliuka', 'eric-wieser', 'github-actions', 'grunweg', 'joneugster', 'mathlib-dependent-issues'] joneugster
assignee:joneugster
28-46085
1 month ago
537-68993
537 days ago
1-19055
1 day
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'] RemyDegenne
assignee:RemyDegenne
28-43752
1 month ago
70-36137
70 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 43/0 Mathlib/Data/Sym/Sym2.lean 1 7 ['SnirBroshi', 'eric-wieser', 'github-actions'] pechersky
assignee:pechersky
28-38568
1 month ago
38-75777
38 days ago
38-75732
38 days
33275 YuvalFilmus
author:YuvalFilmus
 feat(Trigonometric/Chebyshev/Extremal): Chebyshev polynomials maximize iterated derivatives We prove that Chebyshev polynomials maximized iterated derivatives at points x≥1. --- - [x] depends on: #33259 - [x] depends on: #33274 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-analysis 74/1 Mathlib/Analysis/SpecialFunctions/Trigonometric/Chebyshev/Extremal.lean 1 6 ['github-actions', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] dupuisf
assignee:dupuisf
28-37878
1 month ago
52-67803
52 days ago
52-70089
52 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
28-37649
1 month ago
198-22890
198 days ago
0-2575
42 minutes
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
28-36776
1 month ago
60-15423
60 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
28-36526
1 month 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
28-25690
1 month 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 87/3 Mathlib/Analysis/Meromorphic/Complex.lean,Mathlib/NumberTheory/LSeries/AbstractFuncEq.lean,Mathlib/NumberTheory/LSeries/HurwitzZetaEven.lean 3 20 ['Komyyy', 'github-actions', 'j-loreaux', 'loefflerd', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] j-loreaux
assignee:j-loreaux
27-85883
27 days ago
202-34779
202 days ago
30-62878
30 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 merge-conflict awaiting-author t-analysis large-import please-adopt 322/64 Mathlib/Analysis/LocallyConvex/AbsConvex.lean,Mathlib/Analysis/LocallyConvex/Bipolar.lean,Mathlib/Analysis/LocallyConvex/Polar.lean,Mathlib/Analysis/LocallyConvex/WeakDual.lean,Mathlib/Topology/Algebra/Module/LinearSpan.lean,Mathlib/Topology/Algebra/Module/StrongTopology.lean,Mathlib/Topology/Algebra/Module/WeakBilin.lean 7 116 ['JonBannon', 'eric-wieser', 'faenuccio', 'github-actions', 'goliath-klein', 'j-loreaux', 'leanprover-community-bot-assistant', 'mans0954', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot', 'mcdoll', 'vihdzp'] faenuccio and j-loreaux
assignee:j-loreaux assignee:faenuccio
27-77095
27 days ago
167-49769
167 days ago
17-41764
17 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 - [ ] 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
27-71287
27 days ago
259-57073
259 days ago
0-5139
1 hour
33387 AntoineChambert-Loir
author:AntoineChambert-Loir
 chore(LinearAlgebra/Transvection/Basic): mv Transvection.lean file to Transvection.Basic.lean In preparation for a long file about Dieudonné's theorem on the generation of the general and special linear groups, mv file#Mathlib/LinearAlgebra/Transvection.lean to file#Mathlib/LinearAlgebra/Transvection/Basic.lean --- - [ ] depends on: #33348 - [ ] depends on: #33347 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) file-removed t-algebra blocked-by-other-PR merge-conflict
label:t-algebra$
 283/7 Mathlib.lean,Mathlib/LinearAlgebra/Center.lean,Mathlib/LinearAlgebra/Transvection/Basic.lean 3 8 ['github-actions', 'mathlib-merge-conflicts', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
27-64190
27 days ago
77-37578
77 days ago
0-1415
23 minutes
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. --- - [ ] depends on: #33348 - [ ] depends on: #33347 - [ ] depends on: #33387 - [ ] depends on: #33282 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra blocked-by-other-PR file-removed merge-conflict
label:t-algebra$
 844/7 Mathlib.lean,Mathlib/LinearAlgebra/Center.lean,Mathlib/LinearAlgebra/FiniteDimensional/Lemmas.lean,Mathlib/LinearAlgebra/LinearIndependent/Lemmas.lean,Mathlib/LinearAlgebra/Transvection/Basic.lean,Mathlib/LinearAlgebra/Transvection/Generation.lean 6 8 ['github-actions', 'mathlib-merge-conflicts', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
27-64189
27 days ago
77-21629
77 days ago
0-353
5 minutes
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/) file-removed t-algebra blocked-by-other-PR merge-conflict
label:t-algebra$
 1001/7 Mathlib.lean,Mathlib/LinearAlgebra/Center.lean,Mathlib/LinearAlgebra/FiniteDimensional/Lemmas.lean,Mathlib/LinearAlgebra/LinearIndependent/Lemmas.lean,Mathlib/LinearAlgebra/Transvection/Basic.lean,Mathlib/LinearAlgebra/Transvection/Generation.lean 6 8 ['github-actions', 'mathlib-merge-conflicts', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
27-64187
27 days ago
76-71421
76 days ago
0-705
11 minutes
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/) file-removed t-algebra blocked-by-other-PR merge-conflict
label:t-algebra$
 1448/7 Mathlib.lean,Mathlib/LinearAlgebra/Center.lean,Mathlib/LinearAlgebra/FiniteDimensional/Lemmas.lean,Mathlib/LinearAlgebra/LinearIndependent/Lemmas.lean,Mathlib/LinearAlgebra/Transvection/Basic.lean,Mathlib/LinearAlgebra/Transvection/Generation.lean 6 8 ['github-actions', 'mathlib-merge-conflicts', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
27-64186
27 days ago
73-65287
73 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/) file-removed t-algebra blocked-by-other-PR merge-conflict
label:t-algebra$
 1561/7 Mathlib.lean,Mathlib/LinearAlgebra/Center.lean,Mathlib/LinearAlgebra/FiniteDimensional/Lemmas.lean,Mathlib/LinearAlgebra/LinearIndependent/Lemmas.lean,Mathlib/LinearAlgebra/Transvection/Basic.lean,Mathlib/LinearAlgebra/Transvection/Generation.lean 6 8 ['github-actions', 'mathlib-merge-conflicts', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
27-64184
27 days ago
71-23108
71 days ago
0-1282
21 minutes
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 file-removed blocked-by-other-PR merge-conflict
label:t-algebra$
 1800/22 Mathlib.lean,Mathlib/LinearAlgebra/Center.lean,Mathlib/LinearAlgebra/FiniteDimensional/Lemmas.lean,Mathlib/LinearAlgebra/LinearIndependent/Lemmas.lean,Mathlib/LinearAlgebra/Transvection/Basic.lean,Mathlib/LinearAlgebra/Transvection/Generation.lean,Mathlib/LinearAlgebra/Transvection/SpecialLinearGroup.lean 7 7 ['github-actions', 'mathlib-merge-conflicts', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
27-64183
27 days ago
69-23242
69 days ago
0-93
1 minute
33715 AntoineChambert-Loir
author:AntoineChambert-Loir
 feat(LinearAlgebra/Projectivization/Action): prove that the action is 2-transitive and primitive Define the action of the special linear group on the projectivization. Prove that it is 2-transitive and primitive. --- - [ ] depends on: #33387 - [ ] depends on: #33347 - [ ] depends on: #32757 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) file-removed blocked-by-other-PR t-algebra large-import merge-conflict
label:t-algebra$
 295/54 Mathlib.lean,Mathlib/LinearAlgebra/Center.lean,Mathlib/LinearAlgebra/FiniteDimensional/Basic.lean,Mathlib/LinearAlgebra/FiniteDimensional/Lemmas.lean,Mathlib/LinearAlgebra/Projectivization/Action.lean,Mathlib/LinearAlgebra/Projectivization/Basic.lean,Mathlib/LinearAlgebra/SpecialLinearGroup.lean,Mathlib/LinearAlgebra/Transvection/Basic.lean 8 8 ['github-actions', 'mathlib-merge-conflicts', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
27-64181
27 days ago
68-41289
68 days ago
0-3357
55 minutes
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). --- - [ ] depends on: #33347 - [ ] depends on: #33348 - [ ] depends on: #33387 - [ ] depends on: #33282 - [ ] depends on: #33392 - [ ] depends on: #33402 - [ ] depends on: #33485 - [ ] 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 file-removed t-algebra merge-conflict
label:t-algebra$
 2854/559 Mathlib.lean,Mathlib/GroupTheory/Commutator/Basic.lean,Mathlib/LinearAlgebra/Basis/Fin.lean,Mathlib/LinearAlgebra/Center.lean,Mathlib/LinearAlgebra/Dual/Defs.lean,Mathlib/LinearAlgebra/FiniteDimensional/Lemmas.lean,Mathlib/LinearAlgebra/LinearIndependent/Lemmas.lean,Mathlib/LinearAlgebra/SpecialLinearGroup.lean,Mathlib/LinearAlgebra/Transvection.lean,Mathlib/LinearAlgebra/Transvection/Basic.lean,Mathlib/LinearAlgebra/Transvection/Generation.lean,Mathlib/LinearAlgebra/Transvection/SpecialLinearGroup.lean 12 5 ['github-actions', 'mathlib-merge-conflicts', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
27-64057
27 days ago
63-57053
63 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 - [ ] depends on: #33348 - [ ] 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/) file-removed large-import blocked-by-other-PR t-algebra merge-conflict
label:t-algebra$
 3253/563 Mathlib.lean,Mathlib/GroupTheory/Commutator/Basic.lean,Mathlib/LinearAlgebra/Basis/Fin.lean,Mathlib/LinearAlgebra/Center.lean,Mathlib/LinearAlgebra/Dual/Defs.lean,Mathlib/LinearAlgebra/FiniteDimensional/Basic.lean,Mathlib/LinearAlgebra/FiniteDimensional/Lemmas.lean,Mathlib/LinearAlgebra/LinearIndependent/Lemmas.lean,Mathlib/LinearAlgebra/Projectivization/Action.lean,Mathlib/LinearAlgebra/Projectivization/Basic.lean,Mathlib/LinearAlgebra/SpecialLinearGroup.lean,Mathlib/LinearAlgebra/SpecialLinearGroup/Simple.lean,Mathlib/LinearAlgebra/Transvection.lean,Mathlib/LinearAlgebra/Transvection/Basic.lean,Mathlib/LinearAlgebra/Transvection/Generation.lean,Mathlib/LinearAlgebra/Transvection/SpecialLinearGroup.lean 16 5 ['github-actions', 'mathlib-merge-conflicts', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
27-64055
27 days ago
62-57001
62 days ago
0-1083
18 minutes
31425 robertmaxton42
author:robertmaxton42
 feat(Topology): implement delaborators for non-standard topology notation Add delaborators for unary and binary notation related to non-standard topologies in the TopologicalSpace namespace. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-topology 250/4 Mathlib.lean,Mathlib/Topology/Defs/Basic.lean,Mathlib/Util/DelabNonCanonical.lean,MathlibTest/Delab/TopologicalSpace.lean 4 45 ['eric-wieser', 'github-actions', 'jcommelin', 'kckennylau', 'robertmaxton42'] eric-wieser
assignee:eric-wieser
27-53800
27 days ago
59-20969
59 days ago
112-82831
112 days
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
27-53583
27 days ago
27-53683
27 days ago
39-79348
39 days
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 ℝ → Matrix p q ℝ`. 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. mkdir 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 219/0 Mathlib.lean,Mathlib/Analysis/Matrix/Jacobian.lean 2 11 ['erdOne', 'github-actions', 'jcommelin'] sgouezel
assignee:sgouezel
27-53231
27 days ago
27-53985
27 days ago
39-33072
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
27-52092
27 days ago
27-53290
27 days ago
1-24662
1 day
34019 adomani
author:adomani
 feat: global syntax linter --- [![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 5 ['adomani', 'bryangingechen', 'github-actions', 'mathlib-splicebot'] nobody
27-49811
27 days ago
unknown
0-0
0 seconds
35448 mathlib-splicebot
author:mathlib-splicebot
 chore(Mathlib/Tactic/Linter/GlobalSyntax.lean): automated extraction This PR was automatically created from a review comment on PR #34019. t-linter new-contributor 138/0 Mathlib/Tactic/Linter/GlobalSyntax.lean 1 2 ['github-actions'] nobody
27-49742
27 days ago
27-49410
27 days ago
0-403
6 minutes
33664 ooovi
author:ooovi
 feat(Geometry/Convex/Cone/Pointed): face lattice of pointed cones - Create a subdirectory in `Cone` for pointed cones and move existing files there. - 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 --- - [ ] depends on: #33780 for the definition of the lineal space [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) file-removed awaiting-author t-convex-geometry merge-conflict blocked-by-other-PR 541/10 Mathlib.lean,Mathlib/Analysis/Convex/Cone/Basic.lean,Mathlib/Analysis/Convex/Cone/Closure.lean,Mathlib/Analysis/Convex/Cone/Dual.lean,Mathlib/Geometry/Convex/Cone/Pointed/Basic.lean,Mathlib/Geometry/Convex/Cone/Pointed/Dual.lean,Mathlib/Geometry/Convex/Cone/Pointed/Face/Basic.lean,Mathlib/Geometry/Convex/Cone/Pointed/Face/Lattice.lean,Mathlib/Geometry/Convex/Cone/Pointed/TensorProduct.lean 9 87 ['YaelDillies', 'eric-wieser', 'github-actions', 'martinwintermath', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot', 'ooovi'] nobody
27-49539
27 days ago
69-59795
69 days ago
0-8346
2 hours
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
27-47849
27 days ago
27-48055
27 days ago
39-9588
39 days
34851 dennj
author:dennj
 feat(Data/Matrix/Mul): add diagonal and transpose lemmas for vector operations This adds three lemmas for matrix-vector operations that serve as foundational support for future ML formalization: - `vecMul_diagonal_dotProduct`: weighted inner product `x ᵥ* diagonal d ⬝ᵥ y = ∑ i, d i * x i * y i` - `dotProduct_transpose_mulVec`: bilinear form symmetry `x ⬝ᵥ Aᵀ *ᵥ y = y ⬝ᵥ A *ᵥ x` - `mul_diagonal_mulVec`: column-weighted sum `(A * diagonal d) *ᵥ x = ∑ i, (d i * x i) • A.col i` These are basic linear algebra identities involving diagonal matrices and vector operations that appear frequently in machine learning contexts (weighted inner products, attention mechanisms, feature scaling, diagonal preconditioning). t-data new-contributor 22/0 Mathlib/Data/Matrix/Mul.lean 1 5 ['dennj', 'eric-wieser', 'github-actions', 'themathqueen'] pechersky
assignee:pechersky
27-24776
27 days ago
40-34252
40 days ago
40-34207
40 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
27-23826
27 days ago
118-75995
118 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
27-23823
27 days ago
61-58794
61 days ago
0-546
9 minutes
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
27-23698
27 days ago
27-23699
27 days ago
5-13758
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
27-23697
27 days ago
27-23697
27 days ago
4-79090
4 days
28546 Sfgangloff
author:Sfgangloff
 feat(SymbolicDynamics): basic setup of Zd, full shift, cylinders, pat… This PR adds a **group-generic** foundation for symbolic dynamics over an arbitrary group `G`, together with convenient specializations for `ℤ` and `ℤ^d`. Summary of additions: - **Full shift and shift action** - `abbrev FullShift (A G) := G → A` (inherits product topology from the Π-type). - Right shift `shift g x` with convention `(shift g x) h = x (h * g)`. - **Cylinders and topology** - `cylinder U x : Set (G → A)` for finite `U : Finset G`. - Cylinders are open under `[DiscreteTopology A]`; with a finite alphabet they are also closed. - Equality with dependent products: `cylinder U x = Set.pi (↑U) (fun i => ({x i} : Set A))`, enabling use of the `Set.pi` API. - **Patterns, occurrences, and subshifts** - `Pattern A G` with finite `support : Finset G` and `data : support → A`. - `Pattern.occursIn p x g` (occurrence at translate `g`) and the expected shift law. - `forbids F` and `Subshift A G` (closed, shift-invariant subsets). - `FixedSupport A G U` with an equivalence to `(U → A)` to obtain finiteness. - **Language on finite shapes and counting** - `languageOn X U`, `languageCardOn X U`, and `patternCountOn Y U`. - **Entropy along a shape sequence** - `limsupAtTop` (as an `sInf` of eventual upper bounds). - `entropyAlong X F hF := limsup (log (patternCountOn X (F n) + 1) / |F n|)` for any nonempty finite shapes `F : ℕ → Finset G` (the `+ 1` avoids `log 0`). - **Specializations** - `IntShapes`: segments `[-n,n]` on `Multiplicative ℤ`, with `entropy_Z`. - `ZdShapes`: boxes `[-n,n]^d` on `ℤ^d` (as functions `Fin d → ℤ`), with `entropy_Zd`. Mathematical remarks: - The API is **shape-parametric**: entropy is defined along user-provided finite shapes. - On **amenable** groups, using a **Følner** sequence yields a canonical value (Ornstein–Weiss). This PR does not assume amenability; the family of shapes is an explicit input. Motivation: Provide a clean, reusable base for symbolic dynamics on groups in mathlib. Future work: - Add a Følner predicate and prove shape-independence / limit existence on amenable groups. - Expand the `ℤ`/`ℤ^d` toolkit (alternative shapes, mixing, factors). - Develop 1D theory and, longer-term, multidimensional SFT results (e.g. along the lines of Hochman–Meyerovitch). t-dynamics new-contributor 746/0 Mathlib.lean,Mathlib/Dynamics/SymbolicDynamics/Basic.lean,Mathlib/Tactic/Translate/ToAdditive.lean 3 180 ['Sfgangloff', 'botbaki-review', 'eric-wieser', 'github-actions', 'kckennylau', 'mathlib4-merge-conflict-bot', 'sgouezel'] sgouezel
assignee:sgouezel
27-20245
27 days ago
28-19543
28 days ago
131-65368
131 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
27-17723
27 days ago
27-17723
27 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
27-1600
27 days ago
114-24824
114 days ago
9-3209
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
27-1467
27 days ago
77-66140
77 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
27-1466
27 days ago
80-70226
80 days ago
0-20
20 seconds
33441 dupuisf
author:dupuisf
 feat: add `LawfulInv` class for types with an inverse that behaves like `Ring.inverse` This PR introduces a new typeclass `LawfulInv` for types which have an `Inv` instance that is equal to zero on non-invertible elements. This is meant to replace `Ring.inverse`. The current plan is to do this refactor in several steps: 1. This PR, which only introduces the class and adds instances for matrices and continuous linear maps. 2. Add instances for all C*-algebras, and make `CStarAlgebra` extend this. 3. Deprecate `Ring.inverse`. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) awaiting-zulip t-algebra merge-conflict
label:t-algebra$
 185/27 Mathlib/Algebra/GroupWithZero/Defs.lean,Mathlib/Algebra/GroupWithZero/Invertible.lean,Mathlib/Algebra/GroupWithZero/Units/Basic.lean,Mathlib/LinearAlgebra/Matrix/NonsingularInverse.lean,Mathlib/LinearAlgebra/Matrix/PosDef.lean,Mathlib/RingTheory/DividedPowers/Padic.lean,Mathlib/Topology/Algebra/Module/Equiv.lean 7 35 ['dupuisf', 'eric-wieser', 'github-actions', 'j-loreaux', 'mathlib-merge-conflicts', 'mathlib4-merge-conflict-bot', 'plp127'] nobody
27-1339
27 days ago
55-34474
55 days ago
7-54141
7 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
27-1331
27 days ago
27-1332
27 days ago
34-16498
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 blocked-by-other-PR merge-conflict 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-merge-conflicts', 'mathlib4-dependent-issues-bot'] nobody
27-1330
27 days ago
66-26272
66 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 awaiting-author merge-conflict 200/58 Counterexamples/Phillips.lean,Mathlib.lean,Mathlib/SetTheory/Cardinal/ContinuumHypothesis.lean 3 21 ['b-mehta', 'eric-wieser', 'github-actions', 'grunweg', 'mathlib-merge-conflicts', 'plp127', 'vihdzp'] nobody
27-149
27 days ago
59-4145
59 days ago
0-76
1 minute
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
27-145
27 days ago
44-28970
44 days ago
9-1774
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
26-86276
26 days 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 19 ['adomani', 'eric-wieser', 'github-actions', 'grunweg', 'joneugster', 'kim-em', 'leanprover-bot', 'leanprover-radar', 'mathlib-bors', 'mathlib4-merge-conflict-bot'] grunweg
assignee:grunweg
26-80165
26 days ago
199-76483
199 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
26-76566
26 days ago
26-73848
26 days ago
0-8005
2 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
26-67601
26 days ago
26-67602
26 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/) blocked-by-other-PR t-euclidean-geometry 424/7 Mathlib.lean,Mathlib/Geometry/Euclidean/Sphere/OrthRadius.lean,Mathlib/Geometry/Euclidean/Sphere/PolePolar.lean,Mathlib/Geometry/Euclidean/Sphere/Tangent.lean 4 3 ['github-actions', 'mathlib-merge-conflicts', 'mathlib4-dependent-issues-bot'] nobody
26-61387
26 days ago
115-62918
115 days ago
0-760
12 minutes
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/OrthRadius.lean,Mathlib/Geometry/Euclidean/Sphere/PolePolar.lean,Mathlib/Geometry/Euclidean/Sphere/Tangent.lean 4 3 ['github-actions', 'mathlib-merge-conflicts', 'mathlib4-dependent-issues-bot'] nobody
26-61321
26 days ago
115-62920
115 days ago
0-313
5 minutes
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 583/9 Mathlib.lean,Mathlib/Geometry/Euclidean/Incenter.lean,Mathlib/Geometry/Euclidean/Sphere/OrthRadius.lean,Mathlib/Geometry/Euclidean/Sphere/PolePolar.lean,Mathlib/Geometry/Euclidean/Sphere/Tangent.lean 5 3 ['github-actions', 'mathlib-merge-conflicts', 'mathlib4-dependent-issues-bot'] nobody
26-61275
26 days ago
114-15230
114 days ago
0-1725
28 minutes
33252 SnirBroshi
author:SnirBroshi
 chore(Combinatorics/SimpleGraph/Coloring): use `IsIndepSet` instead of `IsAntichain` to spell "a color class is an independent set" --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-combinatorics 6/2 Mathlib/Combinatorics/SimpleGraph/Coloring.lean,Mathlib/Combinatorics/SimpleGraph/Partition.lean 2 1 ['github-actions'] b-mehta
assignee:b-mehta
26-18763
26 days ago
38-22549
38 days ago
50-62239
50 days
34193 bwangpj
author:bwangpj
 feat(Topology/Algebra/Ring): ContinuousAddEquiv.mulLeft, mulRight The additive homeomorphism from a topological ring to itself, induced by left/right multiplication by a unit. From FLT. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-topology FLT maintainer-merge 25/0 Mathlib/Topology/Algebra/Ring/Basic.lean 1 10 ['bwangpj', 'dagurtomas', 'eric-wieser', 'github-actions', 'riccardobrasca'] dagurtomas
assignee:dagurtomas
25-80613
25 days ago
54-75512
54 days ago
54-82734
54 days
32891 felixpernegger
author:felixpernegger
 feat(Topology/EMetricSpace): Introduction of ```Weak(Pseudo)EMetricSpace``` This PR introduces Weak(Pseudo)EMetric spaces, some basic properties and the fact that the One-Point Compactification of a Weak(Pseudo)EMetricSpace again has a Weak(Pseudo)EMetricSpace structure. This is inspired by discussion at [this](https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/EMetricSpace.20is.20broken/near/530540916) and based on #27756. In short, types like ```ENNReal``` and ```ENat``` have a very "metric-like" structure, but are not yet a ```WeakPseudoEMetricSpace``` (which is the weakest form of a metric-like structure in mathlib). Therefore, the class```WeakEMetricSpace``` could be used to make more definitions applicable to ```ENNReal```, for instance EVartiationOn ([this](https://leanprover-community.github.io/mathlib4_docs/Mathlib/Topology/EMetricSpace/BoundedVariation.html#eVariationOn)). As of now, this PR is still missing important properties like products and induced (and therefore subtypes) of ```Weak(Pseudo)EMetricSpace```'s and instances ```ENNReal``` and ```ENat``` (which should be rather easy however with the one-point compactification property). awaiting-author new-contributor t-topology merge-conflict 453/10 Mathlib.lean,Mathlib/Topology/EMetricSpace/Defs.lean,Mathlib/Topology/EMetricSpace/Weak.lean 3 30 ['felixpernegger', 'github-actions', 'j-loreaux', 'mathlib4-merge-conflict-bot', 'plp127'] j-loreaux
assignee:j-loreaux
25-60321
25 days ago
55-38227
55 days ago
12-50285
12 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) [![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 7 ['github-actions', 'leanprover-radar', 'mathlib4-merge-conflict-bot', 'mcdoll', 'plp127'] nobody
25-59314
25 days ago
unknown
0-0
0 seconds
30666 erdOne
author:erdOne
 feat(NumberTheory): every number field has a ramified prime --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-number-theory awaiting-author t-algebra
label:t-algebra$
 220/20 Mathlib.lean,Mathlib/Algebra/GroupWithZero/Action/TransferInstance.lean,Mathlib/Algebra/Ring/Int/Field.lean,Mathlib/NumberTheory/NumberField/Basic.lean,Mathlib/NumberTheory/NumberField/Discriminant/Different.lean,Mathlib/NumberTheory/NumberField/ExistsRamified.lean,Mathlib/NumberTheory/RamificationInertia/Basic.lean,Mathlib/RingTheory/Ideal/Norm/AbsNorm.lean,Mathlib/RingTheory/IntegralClosure/IsIntegralClosure/Basic.lean 9 24 ['erdOne', 'github-actions', 'jcommelin', 'mathlib-merge-conflicts', 'mathlib4-merge-conflict-bot', 'tb65536', 'xroblot'] jcommelin
assignee:jcommelin
25-24746
25 days ago
127-57364
127 days ago
13-79962
13 days
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
25-7781
25 days 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', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
25-4736
25 days ago
54-21240
54 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 325/0 Mathlib/Analysis/Distribution/Support.lean 1 2 ['github-actions', 'mathlib-dependent-issues'] nobody
25-4318
25 days ago
25-5122
25 days ago
0-405
6 minutes
35473 mike1729
author:mike1729
 feat(Analysis/Normed/Module): Schauder bases, basic sequences, and the Eberlein–Šmulian theorem This PR develops the theory of Schauder bases and basic sequences in Banach spaces, culminating in a proof of the **Eberlein–Šmulian theorem**: in a Banach space, a weakly countably compact set is weakly compact (and weakly sequentially compact). **Note:** This PR is too large to review in one go. It will be split into smaller parts and merged incrementally. The first part is already under review: The proof follows the basic-sequence approach of Pełczyński, as presented in Albiac–Kalton *Topics in Banach Space Theory* (2016). The main line of argument is: 1. Define generalized Schauder bases (indexed by arbitrary types with a summation filter) and the classical sequential Schauder basis as a special case. 2. Introduce basic sequences and their characterization via the Grünblum condition. 3. Prove the **selection principle**: extract basic sequences from sets where the weak and norm closures disagree (via a perturbation/finite-dimensional compactness argument in the dual). 4. Show that a bounded set containing no basic sequence has relatively weakly compact closure. 5. Combine these ingredients to prove both directions of the Eberlein–Šmulian theorem. ## Main definitions * `GeneralSchauderBasis β 𝕜 X L`: A Schauder basis for a normed space `X` over `𝕜`, indexed by a type `β` with a `SummationFilter L`. Unifies classical (sequential) and unconditional bases. * `BasicSequence 𝕜 X`: A bundled ℕ-indexed sequence forming a Schauder basis for its closed linear span. ## Main results * `isBasicSequence_of_Grunblum_with_bound`: A nonzero sequence satisfying the Grünblum condition is a basic sequence, with explicit basis constant bound. * `basic_sequence_selection_dual`: Extracts a basic sequence from a set that is weak*-dense near 0 but norm-separated from 0. * `exists_basicSequence_of_weakClosure_not_normClosure`: If 0 is in the weak closure of `S` but not its norm closure, then `S` contains a basic sequence. * `schauderBasisOfClosure`: Constructs a Schauder basis for the topological closure from a basis on a subspace. * `no_basic_sequence_implies_relatively_weakly_compact`: A bounded set with no basic sequence has weakly compact closure. * `eberlein_smulian_isSeqCompact`: A weakly countably compact set in a Banach space is weakly sequentially compact. * `eberlein_smulian`: **Eberlein–Šmulian theorem.** A weakly countably compact set in a Banach space is weakly compact. * `IsCompact.frechetUrysohnSpace`: Weakly compact subsets of a Banach space are Fréchet–Urysohn (angelic). ## References * [F. Albiac, N.J. Kalton, *Topics in Banach Space Theory*, Springer, 2016][albiac2016] * I. Singer, *Bases in Banach Spaces*, 1970. --- - [ ] depends on: #34209 - [ ] depends on: #35559 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-analysis new-contributor blocked-by-other-PR 2691/0 Mathlib.lean,Mathlib/Analysis/Normed/Module/SchauderBasis/Basic.lean,Mathlib/Analysis/Normed/Module/SchauderBasis/BasicSequence.lean,Mathlib/Analysis/Normed/Module/SchauderBasis/BasicSequenceSelection.lean,Mathlib/Analysis/Normed/Module/SchauderBasis/Closure.lean,Mathlib/Analysis/Normed/Module/SchauderBasis/CountablyCompact.lean,Mathlib/Analysis/Normed/Module/SchauderBasis/EberleinSmulian.lean,Mathlib/Analysis/Normed/Module/SchauderBasis/NoBasicSequence.lean 8 6 ['CoolRmal', 'github-actions', 'mathlib-dependent-issues', 'mike1729'] nobody
25-532
25 days ago
unknown
0-0
0 seconds
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
24-75584
24 days ago
24-75587
24 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
24-69691
24 days ago
24-69691
24 days ago
55-47428
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 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 3 ['github-actions', 'mathlib-dependent-issues'] nobody
24-68177
24 days ago
28-48962
28 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
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
24-66315
24 days ago
25-34915
25 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
24-65387
24 days ago
24-65387
24 days ago
13-78266
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
24-57614
24 days ago
101-42271
101 days ago
21-2681
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 23/2 Mathlib/Tactic/Linter/TextBased.lean 1 4 ['github-actions', 'grunweg', 'joneugster', 'vihdzp'] nobody
24-50784
24 days ago
25-73464
25 days ago
0-187
3 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 10/10 Mathlib/Control/Monad/Cont.lean,Mathlib/Control/Monad/Writer.lean 2 4 ['Shreyas4991', 'eric-wieser', 'github-actions'] nobody
24-29298
24 days ago
24-29299
24 days ago
0-18707
5 hours
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 [![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 172/0 Mathlib/Data/Sigma/Order.lean,Mathlib/Order/OmegaCompletePartialOrder.lean 2 28 ['Vierkantor', 'YellPika', 'github-actions', 'grunweg', 'mathlib-dependent-issues', 'mathlib-merge-conflicts'] grunweg
assignee:grunweg
24-13286
24 days ago
24-35183
24 days ago
16-66871
16 days
33292 SnirBroshi
author:SnirBroshi
 feat(Combinatorics/SimpleGraph/LineGraph): lift copies/isomorphisms to line-graph Non-injective homomorphisms (`G →g G'`) cannot be lifted to a homomorphism on line-graphs (`G.lineGraph →g G'.lineGraph`) because e.g. `∀ k > 1` there is a homomorphism from `pathGraph k` to `G'` iff `G'` has an edge, and `∀ n > 0, (pathGraph (n + 1)).lineGraph ≃ pathGraph n`, but there is no homomorphism from `pathGraph k` to `pathGraph 1` because it has no edges. So for `G := pathGraph 3` and `G' := pathGraph 2` there is a `G →g G'` but no `G.lineGraph →g G'.lineGraph`. But we can lift `Copy`/`Embedding`/`Iso`. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) large-import t-combinatorics 45/4 Mathlib/Combinatorics/SimpleGraph/LineGraph.lean,Mathlib/Data/Sym/Sym2.lean 2 6 ['SnirBroshi', 'github-actions', 'tb65536'] b-mehta
assignee:b-mehta
24-11106
24 days ago
24-12460
24 days ago
77-72561
77 days
34315 LessnessRandomness
author:LessnessRandomness
 feat(Combinatorics/SimpleGraph/Bipartite): Prove upper bound of edge set cardinality of bipartite graph Two ways to express upper bound of the edge set of bipartite graph: 1) If the cardinalities of both parts/sets, that make bipartite graph, are known, then the upper bound is equal to product of the cardinalities of both parts; 2) Four times of the cardinality of the edge set is less or equal to squared cardinality of vertex set. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-combinatorics 53/0 Mathlib/Combinatorics/SimpleGraph/Bipartite.lean 1 55 ['LessnessRandomness', 'SnirBroshi', 'b-mehta', 'github-actions', 'vlad902'] awainverse
assignee:awainverse
23-60714
23 days ago
23-61546
23 days ago
47-69695
47 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 2126/263 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 13 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
23-57244
23 days ago
87-14900
87 days ago
3-68616
3 days
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
23-55525
23 days ago
39-55697
39 days ago
0-455
7 minutes
34144 IvanRenison
author:IvanRenison
 feat(Data/ENat): add lemma `ENat.iInf_eq_coe_iff` Co-authored-by: SnirBroshi <26556598+SnirBroshi@users.noreply.github.com> --- [Zulip thread](https://leanprover.zulipchat.com/#narrow/channel/217875-Is-there-code-for-X.3F/topic/ENat.2EiInf_eq_nat_iff/with/568699219) [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-data 21/0 Mathlib/Data/ENat/Lattice.lean,Mathlib/Order/ConditionallyCompleteLattice/Basic.lean,Mathlib/Order/ConditionallyCompleteLattice/Indexed.lean 3 16 ['IvanRenison', 'Ruben-VandeVelde', 'SnirBroshi', 'eric-wieser', 'github-actions', 'tb65536'] TwoFX
assignee:TwoFX
23-35811
23 days ago
23-35848
23 days ago
51-58586
51 days
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
23-5175
23 days ago
669-75454
669 days ago
0-55656
15 hours
35620 inaciovasquez2020
author:inaciovasquez2020
 feat(Fintype): choose element from nonempty finite type This PR adds a noncomputable choice function for finite types with nonzero cardinality. * `Fintype.chooseOfCardNeZero` provides a witness of `α` from `[Fintype α]` assuming `Fintype.card α ≠ 0`. * A regression test is included in `MathlibTest/Fintype/ChooseOfCardNeZero.lean`. The construction follows existing mathlib choice patterns and is explicitly marked `noncomputable`. t-data new-contributor 21/0 Mathlib.lean,Mathlib/Data/Fintype/Choose.lean,MathlibTest/Fintype/ChooseOfCardNeZero.lean 3 4 ['github-actions', 'plp127', 'vihdzp'] nobody
23-2123
23 days ago
23-18431
23 days ago
0-448
7 minutes
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 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 2 ['github-actions', 'mathlib-dependent-issues'] nobody
22-43648
22 days ago
38-789
38 days ago
0-50
50 seconds
35655 Rida-Hamadani
author:Rida-Hamadani
 feat(SimpleGraph): strongly regular graphs have diameter 2 A strongly regular graph with positive `μ` must have diameter 2, as long as the vertex set is nontrivial and it is not complete. --- - [ ] depends on: #35657 This statement is useful in the literature, I wanted to add it after seeing it being used in the proof of the Hoffman-Singleton theorem. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) blocked-by-other-PR t-combinatorics 54/0 Mathlib/Combinatorics/SimpleGraph/Metric.lean,Mathlib/Combinatorics/SimpleGraph/StronglyRegular.lean,Mathlib/Data/ENat/Basic.lean 3 2 ['github-actions', 'mathlib-dependent-issues'] nobody
22-27261
22 days ago
22-28216
22 days ago
0-2906
48 minutes
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
21-84499
21 days ago
21-84499
21 days ago
30-23357
30 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 --- - [ ] 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
21-70596
21 days ago
123-75612
123 days ago
0-1
1 second
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
21-51517
21 days ago
22-10681
22 days ago
0-14
14 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 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 3 ['github-actions', 'mathlib-dependent-issues', 'mathlib-merge-conflicts'] nobody
21-50731
21 days ago
22-19088
22 days ago
0-827
13 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
21-29796
21 days ago
97-30666
97 days ago
2-78371
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 164/8 Mathlib/Combinatorics/SimpleGraph/Bipartite.lean,Mathlib/Combinatorics/SimpleGraph/ConcreteColorings.lean 2 70 ['IvanRenison', 'NickAdfor', 'Rida-Hamadani', 'SnirBroshi', 'github-actions', 'kmill', 'mitchell-horner', 'vihdzp', 'vlad902'] kmill
assignee:kmill
21-18770
21 days ago
37-17704
37 days ago
45-25605
45 days
30982 jsm28
author:jsm28
 feat(Geometry/Euclidean/Angle/Incenter): angle bisection and the incenter Add lemmas relating the incenter and excenters of a simplex to angle bisection, both generally for a simplex and more specifically with oriented angles for a triangle. More specific lemmas for a simplex (identifying exactly which excenter corresponds to which bisectors) will require various additional API for bisectors of angles betweeen oriented affine subspaces (but for the most common applications to typical plane geometry problems, I expect the triangle lemmas with oriented angles to be more useful). --- - [ ] depends on: #30474 - [ ] depends on: #30477 - [ ] depends on: #30600 - [ ] depends on: #30703 - [ ] depends on: #30938 - [ ] depends on: #30981 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-euclidean-geometry 269/0 Mathlib.lean,Mathlib/Geometry/Euclidean/Angle/Incenter.lean 2 6 ['Parcly-Taxel', 'github-actions', 'jsm28', 'mathlib-dependent-issues', 'mathlib4-merge-conflict-bot', 'wwylele'] JovanGerb
assignee:JovanGerb
21-17090
21 days ago
34-58778
34 days ago
34-61211
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 blocked-by-other-PR 458/0 Mathlib.lean,Mathlib/Geometry/Euclidean/Angle/Incenter.lean 2 5 ['github-actions', 'jsm28', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot', 'peakpoint'] nobody
21-16860
21 days ago
106-25797
106 days ago
0-790
13 minutes
35555 JovanGerb
author:JovanGerb
 perf: add `AddMonoid` shortcut instance for linear maps The hierarchy of classes is such that `AddCommMonoid` is not a direct parent of `AddCommGroup`. This means that when unifying an instance that comes from `AddCommMonoid` with one that comes from `AddCommGroup`, we end up having to go through the shared parent `AddMonoid`. Hence, it can be beneficial to have a separately defined `AddMonoid` instance. It might be worth it to try to switch up the order of the parents of `AddCommGroup`/`CommGroup` in the `extends` clause, and see if that has beneficial effects. Though this will affect many things, and in particular won't interact well with the `backward.respectTransparency` mess that is going on at the moment. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict 23/7 Mathlib/Algebra/Module/LinearMap/Defs.lean,Mathlib/LinearAlgebra/Multilinear/Basic.lean,Mathlib/Topology/Algebra/Module/LinearMap.lean,Mathlib/Topology/Algebra/Module/Multilinear/Basic.lean 4 5 ['JovanGerb', 'github-actions', 'leanprover-radar', 'mathlib-merge-conflicts'] robin-carlier
assignee:robin-carlier
20-69620
20 days ago
20-69621
20 days ago
4-32369
4 days
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
20-57494
20 days ago
177-16882
177 days ago
2-46827
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
20-52973
20 days ago
21-12109
21 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 20 ['eric-wieser', 'github-actions', 'j-loreaux', 'leanprover-radar', 'mathlib-bors', 'mathlib-dependent-issues', 'mathlib-merge-conflicts', 'urkud'] j-loreaux
assignee:j-loreaux
20-42942
20 days ago
20-42942
20 days ago
15-63882
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 186/41 Mathlib/Analysis/Normed/Group/Uniform.lean,Mathlib/Analysis/Normed/Lp/lpSpace.lean,Mathlib/Analysis/RCLike/Basic.lean 3 14 ['github-actions', 'j-loreaux', 'ster-oc'] j-loreaux
assignee:j-loreaux
20-41894
20 days ago
20-41894
20 days ago
8-27645
8 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 awaiting-author 205/0 Mathlib/Analysis/Complex/CauchyIntegral.lean 1 6 ['github-actions', 'j-loreaux', 'loefflerd', 'mathlib4-merge-conflict-bot', 'thefundamentaltheor3m', 'wwylele'] urkud
assignee:urkud
20-29916
20 days ago
20-29916
20 days ago
34-11222
34 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
20-26132
20 days ago
79-33280
79 days ago
3-73599
3 days
34734 FLDutchmann
author:FLDutchmann
 refactor(Tactic): change `ring` to allow for coefficients in a variable type Add a parameter to the `ring` normal form that allows for the coefficients to be represented by a custom `BaseType`. `ring` (roughly) sets `BaseType` to be `Rat` and implements addition/multiplication/etc. using `norm_num`. The changes should not be noticeable to users. Care was taken to change as little of the implementation details as possible. This refactor is made in preparation of the `algebra` tactic proposed in #31508. In particular `algebra` will (roughly) set `BaseType` to `Ring.ExSum`. This will allow `algebra` to share much of its internals with `ring`. --- - [x] depends on: #34837 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-meta delegated merge-conflict 1106/658 Mathlib/Tactic/Ring/Basic.lean,Mathlib/Tactic/Ring/Common.lean,Mathlib/Tactic/Ring/Compare.lean,Mathlib/Tactic/Ring/RingNF.lean,MathlibTest/ring.lean,scripts/noshake.json 6 60 ['FLDutchmann', 'Vierkantor', 'eric-wieser', 'github-actions', 'leanprover-radar', 'mathlib-bors', 'mathlib-dependent-issues', 'mathlib-merge-conflicts'] Vierkantor
assignee:Vierkantor
20-25760
20 days ago
35-44017
35 days ago
3-76526
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`](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). --- - [ ] depends on: #34755 - [ ] depends on: #34756 - [ ] depends on: #34758 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) blocked-by-other-PR t-ring-theory merge-conflict 346/3 Mathlib/Algebra/Order/Monoid/Unbundled/WithTop.lean,Mathlib/Combinatorics/Matroid/Closure.lean,Mathlib/Data/Finsupp/MonomialOrder.lean,Mathlib/Logic/Basic.lean,Mathlib/RingTheory/MvPolynomial/MonomialOrder.lean 5 5 ['github-actions', 'joneugster', 'mathlib-dependent-issues', 'mathlib-merge-conflicts'] nobody
20-25759
20 days ago
41-83301
41 days ago
0-2097
34 minutes
34805 DavidLedvinka
author:DavidLedvinka
 feat(Tactic): generalize ofScientific NormNum extension to `DivisionSemiring` Co-authored-by: @hrmacbeth t-meta awaiting-author merge-conflict 68/20 Mathlib/Tactic/NormNum/Inv.lean,Mathlib/Tactic/NormNum/OfScientific.lean,MathlibTest/norm_num.lean 3 25 ['DavidLedvinka', 'JovanGerb', 'b-mehta', 'eric-wieser', 'github-actions', 'mathlib-merge-conflicts', 'thorimur'] JovanGerb
assignee:JovanGerb
20-25756
20 days ago
20-32895
20 days ago
20-41410
20 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 5 ['github-actions', 'mathlib-merge-conflicts', 'vihdzp'] nobody
20-25755
20 days ago
38-53440
38 days ago
1-62439
1 day
34854 GrigorenkoPV
author:GrigorenkoPV
 chore(Combinatorics/Enumerative/Catalan): split into `Basic` & `Tree` --- Split off from #34853 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor merge-conflict 228/195 Mathlib.lean,Mathlib/Combinatorics/Enumerative/Catalan.lean,Mathlib/Combinatorics/Enumerative/Catalan/Basic.lean,Mathlib/Combinatorics/Enumerative/Catalan/Tree.lean,Mathlib/Combinatorics/Enumerative/DyckWord.lean,Mathlib/RingTheory/PowerSeries/Catalan.lean 6 5 ['SnirBroshi', 'github-actions', 'mathlib-merge-conflicts', 'vihdzp'] thorimur
assignee:thorimur
20-25754
20 days ago
20-25755
20 days ago
19-76299
19 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 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor large-import t-order 191/1 Mathlib/Data/Sum/Basic.lean,Mathlib/Data/Sum/Order.lean,Mathlib/Order/OmegaCompletePartialOrder.lean,Mathlib/Order/ScottContinuity.lean 4 20 ['Vierkantor', 'YellPika', 'github-actions', 'mathlib-dependent-issues', 'mathlib-merge-conflicts', 'vihdzp'] bryangingechen
assignee:bryangingechen
20-18750
20 days ago
31-46913
31 days ago
41-9120
41 days
35273 grunweg
author:grunweg
 chore: replace `continuity` -> `fun_prop` in remaining auto-parameters Resurrected version of #13994. Let's look at the current fall-out and performance effect. --- - [x] depends on: #35278 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-topology 23/16 Mathlib/Analysis/Convex/PathConnected.lean,Mathlib/Analysis/LocallyConvex/WeakSpace.lean,Mathlib/Analysis/SpecialFunctions/Arcosh.lean,Mathlib/Topology/Algebra/Algebra.lean,Mathlib/Topology/Algebra/Category/ProfiniteGrp/Basic.lean,Mathlib/Topology/Algebra/ContinuousMonoidHom.lean,Mathlib/Topology/Algebra/Module/Equiv.lean,Mathlib/Topology/Algebra/Module/LinearMap.lean,Mathlib/Topology/Algebra/SeparationQuotient/Basic.lean,Mathlib/Topology/Category/TopCat/Limits/Products.lean,Mathlib/Topology/Category/TopCat/ULift.lean,Mathlib/Topology/ContinuousMap/Basic.lean,Mathlib/Topology/ContinuousMap/Defs.lean,Mathlib/Topology/FiberPartition.lean 14 4 ['github-actions', 'grunweg', 'leanprover-radar', 'mathlib-dependent-issues'] urkud
assignee:urkud
20-18745
20 days ago
26-75083
26 days ago
27-2130
27 days
35565 felixpernegger
author:felixpernegger
 feat(Topology): sequentially T2 spaces Adds typeclass for topoligcal spaces where convergent sequences have a unique limit. This lies between T2 and T1 and is occassionally useful when T2 is not strictly required. An example of a non T2 space with unique limit is the one point compactification of Q. There are some more implications not in this PR, see https://topology.pi-base.org/properties/P000099 In particular, (countably) compact sets are closed in sequentially T2 spaces. t-topology 135/0 Mathlib.lean,Mathlib/Topology/SequentiallyHausdorff.lean 2 1 ['github-actions'] urkud
assignee:urkud
20-18740
20 days ago
24-65438
24 days ago
24-65937
24 days
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
20-13213
20 days ago
20-33189
20 days ago
0-2842
47 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
20-12982
20 days ago
20-15230
20 days ago
0-122
2 minutes
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 - [ ] 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
19-67036
19 days ago
30-64125
30 days ago
0-1258
20 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
19-63035
19 days ago
276-75179
276 days ago
0-28
28 seconds
35239 JohnnyTeutonic
author:JohnnyTeutonic
 feat(Logic/Function): add Lawvere fixed-point theorem Adds Lawvere's fixed-point theorem. This is the classical diagonal argument that generalizes \cantor_surjective\ and \cantor_injective\ (both already in Mathlib). The proof is a two-line term-mode construction. t-logic awaiting-author merge-conflict 12/3 Mathlib/Logic/Function/Basic.lean 1 8 ['JohnnyTeutonic', 'github-actions', 'mathlib-merge-conflicts', 'robin-carlier', 'vihdzp'] nobody
19-52099
19 days ago
31-43883
31 days ago
0-33100
9 hours
34154 euprunin
author:euprunin
 chore: golf using `grind` (and add four supporting `grind` annotations) The goal of this golfing PR is to decrease the number of times lemmas are called explicitly (replacing calls to lemmas with calls to tactics). Any decrease in compilation time is a welcome side effect, although it is not a primary objective. Trace profiling results (shown if ≥10 ms before or after): * `Orientation.nonneg_inner_and_areaForm_eq_zero_iff_sameRay`: 311 ms before, 284 ms after 🎉 * `UV.compression_self`: 29 ms before, 19 ms after 🎉 * `IsSepClosed.exists_root_C_mul_X_pow_add_C_mul_X_add_C`: 405 ms before, 291 ms after 🎉 * `InnerProductGeometry.norm_add_eq_add_norm_iff_angle_eq_zero`: 425 ms before, 309 ms after 🎉 This golfing PR is batched under the following guidelines: * Up to ~5 changed files per PR * Up to ~25 changed declarations per PR * Up to ~100 changed lines per PR --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) 9/30 Mathlib/Algebra/Polynomial/Degree/Defs.lean,Mathlib/Algebra/Polynomial/Degree/Operations.lean,Mathlib/Analysis/InnerProductSpace/TwoDim.lean,Mathlib/Combinatorics/SetFamily/Compression/UV.lean,Mathlib/FieldTheory/IsSepClosed.lean,Mathlib/Geometry/Euclidean/Angle/Unoriented/Basic.lean 6 13 ['Parcly-Taxel', 'euprunin', 'github-actions', 'leanprover-radar', 'mathlib-merge-conflicts', 'mathlib4-merge-conflict-bot', 'tb65536'] kim-em
assignee:kim-em
19-45103
19 days ago
19-65900
19 days ago
47-78612
47 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 blocked-by-other-PR 367/0 Mathlib.lean,Mathlib/Geometry/Euclidean/Angle/Incenter.lean 2 6 ['github-actions', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
19-37950
19 days ago
106-45573
106 days ago
0-736
12 minutes
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 1728/9 Archive.lean,Archive/Imo/Imo2024Q4.lean,Mathlib.lean,Mathlib/Geometry/Euclidean/Angle/Incenter.lean,Mathlib/Geometry/Euclidean/Incenter.lean,Mathlib/Geometry/Euclidean/Sphere/OrthRadius.lean,Mathlib/Geometry/Euclidean/Sphere/PolePolar.lean,Mathlib/Geometry/Euclidean/Sphere/Tangent.lean 8 6 ['github-actions', 'mathlib-merge-conflicts', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
19-37919
19 days ago
106-21510
106 days ago
0-2910
48 minutes
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
19-29494
19 days ago
23-65522
23 days ago
17-25728
17 days
35783 IvanRenison
author:IvanRenison
 refactor(Combinatorics): move `Dart` from `SimpleGraph` to `HasAdj` --- Zulip discussion: https://leanprover.zulipchat.com/#narrow/channel/252551-graph-theory/topic/HasAdj/with/575843445 - [ ] depends on: #35776 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) WIP t-combinatorics blocked-by-other-PR 226/93 Mathlib.lean,Mathlib/Combinatorics/Digraph/HasAdj.lean,Mathlib/Combinatorics/HasAdj/Basic.lean,Mathlib/Combinatorics/HasAdj/Dart.lean,Mathlib/Combinatorics/SimpleGraph/Acyclic.lean,Mathlib/Combinatorics/SimpleGraph/Dart.lean,Mathlib/Combinatorics/SimpleGraph/DegreeSum.lean,Mathlib/Combinatorics/SimpleGraph/HasAdj.lean,Mathlib/Combinatorics/SimpleGraph/Maps.lean,Mathlib/Combinatorics/SimpleGraph/Walks/Basic.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 14 2 ['github-actions', 'mathlib-dependent-issues'] nobody
19-26079
19 days ago
unknown
0-0
0 seconds
35402 samueloettl
author:samueloettl
 feat(Dynamics/BirkhoffSum): birkhoffAverage const --- I think this might be useful. My feeling tells me that 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 22/0 Mathlib/Dynamics/BirkhoffSum/Average.lean 1 2 ['github-actions'] urkud
assignee:urkud
19-18772
19 days ago
22-28446
22 days ago
28-61689
28 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
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 32 ['alreadydone', 'artie2000', 'astrainfinita', 'erdOne', 'github-actions', 'leanprover-bot', 'leanprover-radar', 'mathlib4-merge-conflict-bot'] alreadydone
assignee:alreadydone
19-7661
19 days ago
19-12057
19 days ago
47-71970
47 days
33443 sahanwijetunga
author:sahanwijetunga
 feat: Define Isometries of Bilinear Spaces --- We define Isometries of Bilinear Spaces, closely following the implementation of isometries of quadratic spaces. [![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$
 279/0 Mathlib.lean,Mathlib/LinearAlgebra/BilinearForm/Isometry.lean,Mathlib/LinearAlgebra/BilinearForm/IsometryEquiv.lean 3 16 ['github-actions', 'robin-carlier', 'sahanwijetunga'] mattrobball
assignee:mattrobball
18-83471
18 days ago
31-50812
31 days ago
42-86363
42 days
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 10872/6465 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/AB.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/AB.lean,Mathlib/Algebra/Category/ModuleCat/ChangeOfRings.lean,Mathlib/Algebra/Category/ModuleCat/Free.lean,Mathlib/Algebra/Category/ModuleCat/Presheaf.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/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/Finsupp.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/DualNumber.lean,Mathlib/Algebra/EuclideanDomain/Defs.lean,Mathlib/Algebra/EuclideanDomain/Field.lean,Mathlib/Algebra/EuclideanDomain/Int.lean,Mathlib/Algebra/Exact.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/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/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,Mathlib/Algebra/Group/Hom/Instances.lean 2727 2 ['github-actions', 'mathlib-merge-conflicts'] nobody
18-75173
18 days ago
unknown
0-0
0 seconds
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
18-74537
18 days ago
364-52476
364 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
18-74521
18 days ago
315-56415
315 days ago
39-61332
39 days
33479 zcyemi
author:zcyemi
 feat(Geometry/Euclidean/Sphere/Power): Add theorem about cospherical points on two intersecting lines --- Add `cospherical_of_mul_dist_eq_mul_dist_of_angle_eq_pi`. ~~This theorem is the converse of `EuclideanGeometry.mul_dist_eq_mul_dist_of_cospherical_of_angle_eq_pi`. However, the ambient type is required to be two-dimensional, i.e. `Fact (finrank ℝ V = 2)`. I don‘t think (not entirely sure) that lifting the ambient space from dimension 2 to arbitrary dimension is reasonable for this theorem, since the proof is entirely carried out in a two-dimensional plane. Therefore, I place this theorem in `Euclidean/Angle/Sphere` rather than `Euclidean/Sphere/Power`.~~ Deps: - [ ] depends on: #33365 large-import t-euclidean-geometry delegated 109/4 Mathlib/Geometry/Euclidean/Sphere/Basic.lean,Mathlib/Geometry/Euclidean/Sphere/Power.lean 2 18 ['github-actions', 'jsm28', 'mathlib-bors', 'mathlib4-dependent-issues-bot', 'ocfnash', 'zcyemi'] JovanGerb
assignee:JovanGerb
18-59601
18 days ago
18-59602
18 days ago
8-70851
8 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
18-59367
18 days ago
59-62485
59 days ago
1-44258
1 day
35365 wwylele
author:wwylele
 feat(LinearAlgebra/Simplex): closedInterior = interior + face.closedInterior Intermediate lemma towards #34826. This will be used to show the measure on `interior` and `closedInterior` are equal, as the difference is a zero-measure set. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra
label:t-algebra$
 53/0 Mathlib/LinearAlgebra/AffineSpace/Simplex/Basic.lean 1 4 ['copilot-pull-request-reviewer', 'github-actions'] kim-em
assignee:kim-em
18-54763
18 days ago
18-54742
18 days ago
29-49842
29 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'] dagurtomas
assignee:dagurtomas
18-35831
18 days ago
18-35831
18 days ago
14-40819
14 days
30122 xroblot
author:xroblot
 Development branch (1) --- WIP large-import merge-conflict 4807/21 Mathlib.GaloisTower.lean,Mathlib.lean,Mathlib/AddCharTrace.lean,Mathlib/Algebra/Group/Subgroup/Basic.lean,Mathlib/Algebra/Group/Subgroup/Map.lean,Mathlib/Algebra/Group/Submonoid/BigOperators.lean,Mathlib/Algebra/Group/Submonoid/Units.lean,Mathlib/Cyclotomic.lean,Mathlib/Data/Nat/Digits/Lemmas.lean,Mathlib/Data/ZMod/QuotientRing.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/MulChar/Duality.lean,Mathlib/NumberTheory/MulChar/Lemmas.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/Ideal/Quotient/HasFiniteQuotients.lean,Mathlib/RingTheory/Invariant/Basic.lean,Mathlib/Sandbox.lean,Mathlib/StickElt.lean,Mathlib/Teichmuller.lean 38 12 ['github-actions', 'mathlib-merge-conflicts', 'mathlib4-merge-conflict-bot'] nobody
18-28405
18 days ago
165-69476
165 days ago
0-12
12 seconds
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
18-25961
18 days 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
18-25810
18 days ago
18-31600
18 days ago
0-11
11 seconds
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 `Continous.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 53/31 Mathlib/Tactic/FunProp/Core.lean,Mathlib/Tactic/FunProp/FunctionData.lean,Mathlib/Tactic/FunProp/Theorems.lean,MathlibTest/fun_prop_dev.lean 4 1 ['github-actions'] JovanGerb
assignee:JovanGerb
18-18775
18 days ago
21-32866
21 days ago
21-32821
21 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
18-17262
18 days ago
20-25751
20 days ago
11-35673
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
18-8150
18 days ago
282-37449
282 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
18-5676
18 days ago
33-61322
33 days ago
0-531
8 minutes
35656 euprunin
author:euprunin
 chore(ModelTheory): golf proofs This PR removes unused `have`/`haveI`/`let`/`letI` calls. The goal of this golfing PR is to decrease the number of times lemmas are called explicitly (replacing calls to lemmas with calls to tactics). 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): * `FirstOrder.Field.realize_genericMonicPolyHasRoot`: unchanged 🎉 * `FirstOrder.Language.exists_cg_is_age_of`: unchanged 🎉 * `FirstOrder.Language.Theory.models_formula_iff_onTheory_models_equivSentence`: unchanged 🎉 * `FirstOrder.Language.Sentence.realize_cardGe`: unchanged 🎉 * `FirstOrder.Language.Ultraproduct.boundedFormula_realize_cast`: unchanged 🎉 Profiled using `set_option trace.profiler true in`. This golfing PR is batched under the following guidelines: * Up to ~5 changed files per PR * Up to ~25 changed declarations per PR * Up to ~100 changed lines per PR --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-logic 3/16 Mathlib/ModelTheory/Algebra/Field/IsAlgClosed.lean,Mathlib/ModelTheory/Fraisse.lean,Mathlib/ModelTheory/Satisfiability.lean,Mathlib/ModelTheory/Semantics.lean,Mathlib/ModelTheory/Ultraproducts.lean 5 6 ['euprunin', 'github-actions', 'leanprover-radar', 'vihdzp'] nobody
17-84846
17 days ago
22-30951
22 days ago
22-30906
22 days
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
17-69144
17 days ago
unknown
0-0
0 seconds
33458 NoneMore
author:NoneMore
 feat(ModelTheory): add lifting for embeddings to languages with constants Prepare for a generalized Tarski-Vaught test with a set as input instead of a substructure. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-logic new-contributor 46/0 Mathlib/ModelTheory/ElementaryMaps.lean,Mathlib/ModelTheory/LanguageMap.lean 2 7 ['Citronhat', 'NoneMore', 'fpvandoorn', 'github-actions'] fpvandoorn
assignee:fpvandoorn
17-59921
17 days ago
17-60139
17 days ago
73-72673
73 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
17-58848
17 days ago
306-41320
306 days ago
17-16443
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
17-56529
17 days ago
23-43902
23 days ago
0-103
1 minute
35868 Raph-DG
author:Raph-DG
 feat(Topology): Added in a 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/) WIP t-topology 78/0 Mathlib/Topology/Sheaves/SheafCondition/UniqueGluing.lean 1 1 ['github-actions'] nobody
17-56002
17 days ago
17-58476
17 days ago
0-15
15 seconds
35415 joneugster
author:joneugster
 feat(Cache): enable partial cache in downstream projects Migrated to fork from: #21238. Add features to `cache` and cleanup code: * enable partial cache retrieval in downstream projects: `lake exe cache get MyProject.Basic` downloads only the relevant cache to build `MyProject/Basic.lean` --- - [x] depends on: #21834 ### 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 - #21848 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) CI t-meta 34/15 Cache/Hashing.lean,Cache/IO.lean,Cache/Main.lean 3 3 ['github-actions', 'mathlib-dependent-issues', 'mathlib-merge-conflicts'] nobody
17-55903
17 days ago
17-55925
17 days ago
20-7975
20 days
34583 adomani
author:adomani
 feat: basic properties of subnormal subgroups This is a follow up to #34284. Co-authored-by: Inna Capdeboscq --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) large-import t-group-theory 107/3 Mathlib/Algebra/Group/Conj.lean,Mathlib/Algebra/Group/Subgroup/Pointwise.lean,Mathlib/GroupTheory/IsSubnormal.lean 3 38 ['LLaurance', 'adomani', 'github-actions', 'tb65536'] mattrobball
assignee:mattrobball
17-52027
17 days ago
17-51838
17 days ago
33-46995
33 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
17-50502
17 days ago
34-67099
34 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 - [ ] depends on: #34991 - [ ] 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
17-50471
17 days ago
45-30596
45 days ago
0-1
1 second
35653 pepamontero
author:pepamontero
 feat: add ChartedSpace structure on orbit space feat: add ChartedSpace structure on orbit space Add topological preliminaries for properly discontinuous group actions, and use them to equip the orbit space `orbitRel.Quotient G M` with a `ChartedSpace` structure. In particular: - Show that the quotient map `Quotient.mk _ : M → orbitRel.Quotient G M` is a covering map and hence a local homeomorphism. - Construct chosen local inverses of the quotient map and establish properties over them. - Define a `ChartedSpace` instance on the quotient by composing these local inverses with charts of M. This started as an ItaLean2025 project; here is the [Zulip thread](https://leanprover.zulipchat.com/#narrow/channel/541885-ItaLean-2025/topic/Projects.3A.20Quotient.20Manifolds/with/575121158) dedicated to it. --- new-contributor t-differential-geometry 186/0 Mathlib.lean,Mathlib/Geometry/Manifold/Instances/OrbitSpace.lean,Mathlib/Topology/Algebra/OrbitSpace.lean 3 2 ['github-actions'] grunweg
assignee:grunweg
17-50070
17 days ago
22-37815
22 days ago
22-38445
22 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
17-34833
17 days ago
17-34833
17 days ago
38-12430
38 days
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. - [ ] 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/Bounds/Basic.lean,Mathlib/Order/CompleteLattice/Basic.lean,Mathlib/Order/ConditionallyCompleteLattice/Basic.lean,Mathlib/Order/ConditionallyCompleteLattice/Finset.lean 6 12 ['SnirBroshi', 'github-actions', 'mathlib-dependent-issues', 'vihdzp'] nobody
17-33368
17 days ago
18-47161
18 days ago
3-49487
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. *(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 95/0 Mathlib.lean,Mathlib/Logic/Equiv/ListNatBijective.lean 2 4 ['AlexeyMilovanov', 'SnirBroshi', 'github-actions'] nobody
17-30904
17 days ago
17-39976
17 days ago
17-40388
17 days
35831 IvanRenison
author:IvanRenison
 refactor(Combinatorics): move `Walk` from `SimpleGraph` to `HasAdj` --- Zulip discussion: https://leanprover.zulipchat.com/#narrow/channel/252551-graph-theory/topic/HasAdj/with/575843445 - [ ] depends on: #35776 - [ ] depends on: #35783 Replaces #35777 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) blocked-by-other-PR t-combinatorics merge-conflict 1390/1151 Archive/Wiedijk100Theorems/Konigsberg.lean,Mathlib.lean,Mathlib/Combinatorics/Digraph/HasAdj.lean,Mathlib/Combinatorics/HasAdj/Basic.lean,Mathlib/Combinatorics/HasAdj/Dart.lean,Mathlib/Combinatorics/HasAdj/Walks/Basic.lean,Mathlib/Combinatorics/SimpleGraph/Acyclic.lean,Mathlib/Combinatorics/SimpleGraph/AdjMatrix.lean,Mathlib/Combinatorics/SimpleGraph/Circulant.lean,Mathlib/Combinatorics/SimpleGraph/Clique.lean,Mathlib/Combinatorics/SimpleGraph/ConcreteColorings.lean,Mathlib/Combinatorics/SimpleGraph/Connectivity/Connected.lean,Mathlib/Combinatorics/SimpleGraph/Connectivity/EdgeConnectivity.lean,Mathlib/Combinatorics/SimpleGraph/Connectivity/Subgraph.lean,Mathlib/Combinatorics/SimpleGraph/Connectivity/WalkCounting.lean,Mathlib/Combinatorics/SimpleGraph/Connectivity/WalkDecomp.lean,Mathlib/Combinatorics/SimpleGraph/Dart.lean,Mathlib/Combinatorics/SimpleGraph/DegreeSum.lean,Mathlib/Combinatorics/SimpleGraph/Girth.lean,Mathlib/Combinatorics/SimpleGraph/Hamiltonian.lean,Mathlib/Combinatorics/SimpleGraph/HasAdj.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/Trails.lean,Mathlib/Combinatorics/SimpleGraph/Tutte.lean,Mathlib/Combinatorics/SimpleGraph/Walks/Basic.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 33 2 ['github-actions', 'mathlib-dependent-issues'] nobody
17-28609
17 days ago
unknown
0-0
0 seconds
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
17-23931
17 days ago
23-41950
23 days ago
0-371
6 minutes
35250 vlad902
author:vlad902
 feat(SimpleGraph): redefine `cycleGraph` independent of `circulantGraph` Right now the `cycleGraph` definition relies on `circulantGraph` which requires importing Group definitions from the algebra hierarchy. This causes large-imports for me in later PRs where I try to make more widespread use of cycleGraphs, so here I redefine it to be its own independent object, and leave moving it from `Circulant.lean` to another PR (this is parallel to #35084.) --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-combinatorics 10/10 Mathlib/Combinatorics/SimpleGraph/Circulant.lean 1 4 ['SnirBroshi', 'github-actions', 'vihdzp', 'vlad902'] kmill
assignee:kmill
17-18796
17 days ago
31-61089
31 days ago
31-61044
31 days
35592 SnirBroshi
author:SnirBroshi
 chore(Order/Defs/Unbundled): deprecate `def Transitive` in favor of `class IsTrans` --- [`def Transitive`](https://leanprover-community.github.io/mathlib4_docs/Mathlib/Order/Defs/Unbundled.html#Transitive) [`class IsTrans`](https://leanprover-community.github.io/mathlib4_docs/Mathlib/Order/Defs/Unbundled.html#IsTrans) [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 141/110 Mathlib/Algebra/Group/Semiconj/Defs.lean,Mathlib/CategoryTheory/Abelian/Pseudoelements.lean,Mathlib/CategoryTheory/IsConnected.lean,Mathlib/Combinatorics/SimpleGraph/CompleteMultipartite.lean,Mathlib/Combinatorics/SimpleGraph/FiveWheelLike.lean,Mathlib/Computability/Reduce.lean,Mathlib/Data/List/MinMax.lean,Mathlib/Data/Seq/Computation.lean,Mathlib/Data/WSeq/Relation.lean,Mathlib/GroupTheory/FreeGroup/Basic.lean,Mathlib/LinearAlgebra/LinearIndependent/Lemmas.lean,Mathlib/Logic/Relation.lean,Mathlib/ModelTheory/Order.lean,Mathlib/ModelTheory/Semantics.lean,Mathlib/Order/Defs/Unbundled.lean,Mathlib/Order/Interval/Finset/Basic.lean,Mathlib/Order/Quotient.lean,Mathlib/Order/RelClasses.lean,Mathlib/Topology/Connected/Clopen.lean,Mathlib/Topology/Metrizable/Uniformity.lean 20 1 ['github-actions', 'vihdzp'] pechersky
assignee:pechersky
17-18792
17 days ago
24-13738
24 days ago
24-15305
24 days
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 3 ['github-actions', 'wwylele'] TwoFX
assignee:TwoFX
17-18790
17 days ago
22-68695
22 days ago
22-83156
22 days
34423 euprunin
author:euprunin
 chore: golf using `grind` The goal of this golfing PR is to decrease the number of times lemmas are called explicitly (replacing calls to lemmas with calls to tactics). Any decrease in compilation time is a welcome side effect, although it is not a primary objective. Trace profiling results (shown if ≥10 ms before or after): * `LucasLehmer.norm_num_ext.sModNat_eq_sMod`: 950 ms before, 758 ms after 🎉 This golfing PR is batched under the following guidelines: * Up to ~5 changed files per PR * Up to ~25 changed declarations per PR * Up to ~100 changed lines per PR --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) 1/18 Mathlib/NumberTheory/LucasLehmer.lean 1 14 ['eric-wieser', 'euprunin', 'github-actions', 'leanprover-radar', 'robin-carlier'] eric-wieser
assignee:eric-wieser
16-73080
16 days ago
16-73080
16 days ago
49-53331
49 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
16-65733
16 days ago
unknown
0-0
0 seconds
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 merge-conflict 1018/9 Mathlib/Tactic/Linter/Style.lean,MathlibTest/DoubleUnderscore.lean,MathlibTest/HashLint.lean,MathlibTest/Lint.lean,MathlibTest/LintStyle.lean,scripts/nolints.json,scripts/technical-debt-metrics.sh 7 27 ['Vierkantor', 'github-actions', 'grunweg', 'joneugster', 'mathlib-merge-conflicts'] joneugster
assignee:joneugster
16-56504
16 days ago
26-76569
26 days ago
13-82065
13 days
34519 grunweg
author:grunweg
 feat: environment linter for definitions containing an underscore This is almost certainly a violation of the naming convention. In the medium-term, this should become a syntax linter: at the moment, there are too many exceptions in mathlib. Making this an environment linter allows auto-generating a list of existing exceptions. We track the number of violations as a technical debt metric. --- TODO: wait for CI to rebuild mathlib, then update nolints locally [Zulip topic](https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/naming.20convention.20linter/with/570617527) [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-linter CI large-import awaiting-author merge-conflict 650/4 Mathlib/Tactic/Linter/Style.lean,MathlibTest/HashLint.lean,scripts/nolints.json,scripts/technical-debt-metrics.sh 4 28 ['adomani', 'b-mehta', 'github-actions', 'grunweg', 'joneugster', 'mathlib-merge-conflicts', 'plp127', 'vlad902'] b-mehta and joneugster
assignee:joneugster assignee:b-mehta
16-56380
16 days ago
47-42643
47 days ago
0-19754
5 hours
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 189/7 Mathlib.lean,Mathlib/Combinatorics/SimpleGraph/CompleteMultipartite.lean,Mathlib/Combinatorics/SimpleGraph/EdgeLabeling.lean,Mathlib/Combinatorics/SimpleGraph/GrahamPollak.lean 4 1 ['github-actions'] nobody
16-53058
16 days ago
59-54887
59 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
label:t-algebra$
 610/0 Archive.lean,Archive/Robbins.lean 2 1 ['github-actions'] dwrensha
assignee:dwrensha
16-46591
16 days ago
37-11342
37 days ago
37-12949
37 days
35376 michaellee94
author:michaellee94
 feat(Geometry/Manifold): orientable manifolds --- - [ ] 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 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 4 ['github-actions', 'mathlib-dependent-issues', 'mathlib-merge-conflicts'] nobody
16-25109
16 days ago
29-44483
29 days ago
0-169
2 minutes
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
16-24782
16 days ago
20-38578
20 days ago
8-28783
8 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
15-62039
15 days ago
20-36254
20 days ago
0-306
5 minutes
34477 spanning-tree
author:spanning-tree
 refactor(Order): make CompletePartialOrder extend OrderBot Make `CompletePartialOrder` extend `OrderBot`, and add a constructor `completePartialOrderOfLubOfDirected`. Previously, `CompletePartialOrder` had an implicit bottom element but did not extend OrderBot explicitly. Breaking change: `CompletePartialOrder` instances must provide `⊥` and `bot_le`, or use the constructor. See discussion in [Zulip](https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/.3E.20complete.20partial.20order.20and.20domain.20theory.20formalization). --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-order new-contributor 15/1 Mathlib/Order/CompletePartialOrder.lean 1 3 ['Citronhat', 'github-actions', 'mathlib-merge-conflicts'] pechersky
assignee:pechersky
15-58063
15 days ago
15-58086
15 days ago
36-33198
36 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 680/0 Mathlib.lean,Mathlib/Geometry/Manifold/ExistsRiemannianMetric.lean,Mathlib/Geometry/Manifold/PartitionOfUnity.lean 3 200 ['github-actions', 'grunweg', 'idontgetoutmuch'] grunweg
assignee:grunweg
15-51221
15 days ago
15-51247
15 days ago
29-81377
29 days
35879 Jun2M
author:Jun2M
 feat(Combinatorics/Graph): Add graph deletion operations This PR adds definitions and basic lemmas for deleting edges and vertices from a graph in Mathlib/Combinatorics/Graph/Delete.lean. It introduces the following operations: - `G ↾ F` (edgeRestrict): The subgraph of G restricted to the edges in F (vertices are preserved). - `G ＼ F` (edgeDelete): The subgraph of G with the edges in F deleted. - `G[X]` (induce): The subgraph of G induced by the set of vertices X. - `G - X` (vertexDelete): The graph obtained from G by deleting the set of vertices X. These definitions are accompanied by simp lemmas describing their edge sets, incidence relations, and basic properties such as monotonicity. Co-authored-by: Peter Nelson [apn.uni@gmail.com](mailto:apn.uni@gmail.com) --- - [ ] depends on: #26770 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-combinatorics blocked-by-other-PR 534/0 Mathlib.lean,Mathlib/Combinatorics/Graph/Delete.lean,Mathlib/Combinatorics/Graph/Subgraph.lean 3 2 ['github-actions', 'mathlib-dependent-issues'] nobody
15-50483
15 days ago
16-85893
16 days ago
0-355
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 t-algebra new-contributor
label:t-algebra$
 135/0 Mathlib.lean,Mathlib/LinearAlgebra/Matrix/ShermanMorrison.lean 2 11 ['Xxxjdjdid', 'banrovegrie', 'copilot-pull-request-reviewer', 'eric-wieser', 'github-actions', 'wwylele'] kim-em
assignee:kim-em
15-49667
15 days ago
39-53484
39 days ago
39-53439
39 days
35700 inaciovasquez2020
author:inaciovasquez2020
 MeasureTheory: introduce supportDrift for probability measures Minimal mathlib-facing definition of with lemma. Clean-clone reproducibility verified. t-measure-probability new-contributor 119/0 Mathlib/MeasureTheory/SupportDrift.lean,Mathlib/Physics/OperatorAnchor/CoerciveGap.lean,Mathlib/Physics/OperatorAnchor/SpectralGap.lean 3 2 ['github-actions'] nobody
15-40672
15 days ago
15-40374
15 days ago
0-742
12 minutes
34649 peabrainiac
author:peabrainiac
 feat(Analysis/Calculus/ContDiff): add notation `ℕ∞ω` for `WithTop ℕ∞` Add a `ContDiff`-scoped notation `ℕ∞ω` for `WithTop ℕ∞`, accompanying the existing notations `∞` and `ω` for `(⊤ : ℕ∞) : ℕ∞ω` and `⊤ : ℕ∞ω`. --- [Zulip discussion](https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/RFC.3A.20notation.20for.20.60WithTop.20.E2.84.95.E2.88.9E.60/near/573917824) I've also replaced `WithTop ℕ∞` with this new notation already in the files that mention it the most, but not in all files yet; many mention `WithTop ℕ∞` just a couple of times but don't open the `ContDiff` namespace. I'm not sure whether that should be taken as a sign to not make the notation scoped, or whether the solution is just to `open scoped ContDiff` in these files or not use the notation there. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-differential-geometry t-analysis awaiting-author awaiting-zulip merge-conflict 221/218 Mathlib/Analysis/Calculus/BumpFunction/FiniteDimension.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/Defs.lean,Mathlib/Analysis/Calculus/ContDiff/Deriv.lean,Mathlib/Analysis/Calculus/ContDiff/FTaylorSeries.lean,Mathlib/Analysis/Calculus/ContDiff/Operations.lean,Mathlib/Analysis/Calculus/FDeriv/Symmetric.lean,Mathlib/Analysis/Calculus/ImplicitContDiff.lean,Mathlib/Analysis/Calculus/IteratedDeriv/Defs.lean,Mathlib/Analysis/Calculus/VectorField.lean,Mathlib/Analysis/Distribution/ContDiffMapSupportedIn.lean,Mathlib/Analysis/SpecialFunctions/Log/Deriv.lean,Mathlib/Analysis/SpecialFunctions/Trigonometric/InverseDeriv.lean,Mathlib/Geometry/Manifold/Algebra/LieGroup.lean,Mathlib/Geometry/Manifold/Algebra/Monoid.lean,Mathlib/Geometry/Manifold/Algebra/SmoothFunctions.lean,Mathlib/Geometry/Manifold/Algebra/Structures.lean,Mathlib/Geometry/Manifold/ContMDiff/Atlas.lean,Mathlib/Geometry/Manifold/ContMDiff/Basic.lean,Mathlib/Geometry/Manifold/ContMDiff/Defs.lean,Mathlib/Geometry/Manifold/Instances/Sphere.lean,Mathlib/Geometry/Manifold/Instances/UnitsOfNormedAlgebra.lean,Mathlib/Geometry/Manifold/IsManifold/Basic.lean,Mathlib/Geometry/Manifold/VectorBundle/Basic.lean,Mathlib/Geometry/Manifold/VectorBundle/FiberwiseLinear.lean 28 5 ['github-actions', 'j-loreaux', 'mathlib-merge-conflicts', 'peabrainiac'] sgouezel
assignee:sgouezel
15-40089
15 days ago
34-28330
34 days ago
8-6287
8 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 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 45 ['JovanGerb', 'PatrickMassot', 'Vierkantor', 'github-actions', 'hrmacbeth', 'kim-em', 'mathlib4-merge-conflict-bot'] JovanGerb
assignee:JovanGerb
15-38945
15 days ago
15-38945
15 days ago
64-33604
64 days
31891 jsm28
author:jsm28
 feat(Geometry/Euclidean/Sphere/OrthRadius): lemmas for setting up and using polars Add further lemmas about `orthRadius` that are of use in setting up and using poles and polars. In particular, `ncard_inter_orthRadius_eq_two_of_dist_lt_radius` is the key part of showing that, in two dimensions, there are exactly two tangents to a circle from a point outside that circle (where the points of tangency lie on the polar of the point from which the two tangents are drawn). --- Feel free to golf the proof of `ncard_inter_orthRadius_eq_two_of_dist_lt_radius`, it could probably be rather shorter. --- - [ ] depends on: #32296 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-euclidean-geometry 265/7 Mathlib/Geometry/Euclidean/Sphere/OrthRadius.lean,Mathlib/Geometry/Euclidean/Sphere/Tangent.lean 2 28 ['Parcly-Taxel', 'eric-wieser', 'github-actions', 'jsm28', 'mathlib-merge-conflicts', 'mathlib4-dependent-issues-bot'] JovanGerb
assignee:JovanGerb
15-18615
15 days ago
26-61513
26 days ago
114-82695
114 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
15-9844
15 days ago
258-75977
258 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
15-1862
15 days ago
111-14133
111 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 323/0 Mathlib.lean,Mathlib/Combinatorics/SimpleGraph/Extremal/ErdosStoneSimonovits.lean 2 3 ['github-actions', 'mathlib-dependent-issues', 'mathlib4-merge-conflict-bot'] nobody
14-84661
14 days ago
14-84661
14 days ago
14-84662
14 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 2 ['github-actions', 'mathlib-dependent-issues'] nobody
14-81925
14 days ago
38-72016
38 days ago
0-796
13 minutes
34758 Hagb
author:Hagb
 feat(RingTheory/MvPolynomial/MonomialOrder): misc lemmas --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-ring-theory 52/2 Mathlib/RingTheory/MvPolynomial/MonomialOrder.lean 1 7 ['Hagb', 'erdOne', 'github-actions'] mattrobball
assignee:mattrobball
14-76254
14 days ago
14-76310
14 days ago
33-50120
33 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 10/0 Mathlib/NumberTheory/Divisors.lean 1 5 ['adrianmartir', 'alexjbest', 'github-actions'] alexjbest
assignee:alexjbest
14-73570
14 days ago
18-71572
18 days ago
18-71563
18 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
14-71875
14 days ago
14-74993
14 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
14-69174
14 days ago
27-57179
27 days ago
0-3706
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
14-65414
14 days ago
214-50824
214 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. --- Builds on: #31121 Related to: #29639, #29643, #29646 awaiting-author t-algebra new-contributor
label:t-algebra$
 428/0 Mathlib.lean,Mathlib/Algebra/Homology/EulerPoincare.lean 2 25 ['github-actions', 'jessealama', 'joelriou', 'kim-em', 'mathlib-merge-conflicts', 'mathlib4-merge-conflict-bot'] dagurtomas
assignee:dagurtomas
14-64498
14 days ago
142-79670
142 days ago
35-45800
35 days
33790 eliasjudin
author:eliasjudin
 feat(CategoryTheory/Preadditive/Mat): add natural transformation and isomorphism extension theorems Add extensionality lemmas for natural transformations and comparisons `L ≅ Mat_.lift F` in the additive envelope `Mat_`. - Add `Mat_.natTrans_ext`: a natural transformation `F ⟶ G` between functors `Mat_ C ⥤ D` (with `G` additive) is determined by its components on objects of the form `(embedding C).obj X`. - Add `Mat_.liftIso_ext_comp_embeddingLiftIso`: a small uniqueness lemma for comparisons `L ≅ lift F`. These lemmas streamline arguments around the universal property of `Mat_` by reducing equalities to components on objects coming from `C` via `embedding C`. No new instances or simp attributes; only `Mathlib/CategoryTheory/Preadditive/Mat.lean` changes. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-category-theory new-contributor awaiting-author 68/20 Mathlib/CategoryTheory/Preadditive/Mat.lean 1 15 ['eliasjudin', 'github-actions', 'joelriou', 'kim-em', 'mathlib-merge-conflicts'] nobody
14-50751
14 days ago
66-39149
66 days ago
0-25088
6 hours
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 181/2 Mathlib/AlgebraicTopology/SimplexCategory/GeneratorsRelations/NormalForms.lean 1 6 ['github-actions', 'joelriou', 'mathlib-bors', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
14-50096
14 days ago
147-49823
147 days ago
0-22513
6 hours
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
14-48530
14 days ago
277-81062
277 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 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 26 ['JovanGerb', 'Vierkantor', 'github-actions', 'leanprover-radar', 'mathlib-merge-conflicts', 'thorimur'] nobody
14-44434
14 days 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
14-44217
14 days 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
14-42622
14 days ago
231-23888
231 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
14-42620
14 days 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
14-34489
14 days 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
14-34476
14 days ago
unknown
0-0
0 seconds
36006 gasparattila
author:gasparattila
 feat(LinearAlgebra): dimension of `P →ᵃ[R] W` --- - [ ] depends on: #35998 [![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$
 149/0 Mathlib/LinearAlgebra/AffineSpace/AffineEquiv.lean,Mathlib/LinearAlgebra/AffineSpace/FiniteDimensional.lean 2 2 ['github-actions', 'mathlib-dependent-issues'] nobody
14-26348
14 days ago
14-26349
14 days ago
0-2508
41 minutes
35786 DavidLedvinka
author:DavidLedvinka
 feat(Order): Add simp lemma for `IsRelUpperSet` and `IsRelLowerSet` This is useful in scenarios when `simp` can simplify the relation to true. t-order 8/0 Mathlib/Order/UpperLower/Relative.lean 1 3 ['DavidLedvinka', 'eric-wieser', 'github-actions'] bryangingechen
assignee:bryangingechen
14-18755
14 days ago
19-23944
19 days ago
19-23899
19 days
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 74/0 Mathlib.lean,Mathlib/Algebra/GradedMonoid.lean,Mathlib/RingTheory/GradedAlgebra/Homogeneous/Hom.lean 3 2 ['github-actions', 'joneugster'] mattrobball
assignee:mattrobball
14-18750
14 days ago
18-23322
18 days ago
18-23901
18 days
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 awaiting-author t-algebra merge-conflict
label:t-algebra$
 278/7 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/RingTheory/PiTensorProduct.lean,Mathlib/SetTheory/Cardinal/Finite.lean 12 33 ['eric-wieser', 'github-actions', 'joelriou', 'leanprover-community-bot-assistant', 'mathlib-merge-conflicts', 'mathlib4-merge-conflict-bot', 'riccardobrasca'] mattrobball
assignee:mattrobball
14-9574
14 days ago
146-52740
146 days ago
97-17590
97 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 212/52 Mathlib/Analysis/ODE/PicardLindelof.lean,Mathlib/Geometry/Manifold/IntegralCurve/Compact.lean,Mathlib/Geometry/Manifold/IntegralCurve/ExistUnique.lean,Mathlib/Order/Filter/Prod.lean 4 4 ['github-actions', 'leanprover-community-bot-assistant', 'mathlib4-dependent-issues-bot', 'winstonyin'] nobody
14-2012
14 days ago
265-2061
265 days ago
0-23
23 seconds
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 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 69 ['Ruben-VandeVelde', 'Whysoserioushah', 'eric-wieser', 'github-actions', 'kbuzzard', 'kckennylau', 'mathlib-merge-conflicts', 'mathlib4-merge-conflict-bot', 'vlad902'] kbuzzard
assignee:kbuzzard
13-82822
13 days ago
27-23695
27 days ago
29-27940
29 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
13-81712
13 days ago
188-78062
188 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 5 ['SnirBroshi', 'TwoFX', 'eric-wieser', 'github-actions', 'mathlib-merge-conflicts'] TwoFX
assignee:TwoFX
13-76751
13 days ago
109-80091
109 days ago
35-84279
35 days
35576 Tehlikeli107
author:Tehlikeli107
 ⚡ [performance] Pre-compile regexes in lake-build-wrapper.py - Pre-compile `file_info_re` and `progress_re` in `BuildOutputProcessor.__init__` to avoid repeated compilation overhead. - Replace `re.sub(r'\.', '/', target)` with `target.replace('.', '/')` for better performance when converting module names to file paths. These changes result in a measured ~40% performance improvement in the core processing logic of the wrapper script. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) file-removed awaiting-author CI new-contributor merge-conflict 8/707 scripts/bench/README.md,scripts/bench/build/README.md,scripts/bench/build/fake-root/bin/lean,scripts/bench/build/fake-root/bin/lean.py,scripts/bench/build/lakeprof_report_template.html,scripts/bench/build/lakeprof_report_upload.py,scripts/bench/build/run,scripts/bench/combine.py,scripts/bench/lint/README.md,scripts/bench/lint/run,scripts/bench/measure.py,scripts/bench/open-mathlib/README.md,scripts/bench/open-mathlib/run,scripts/bench/repeatedly.py,scripts/bench/run,scripts/bench/size/README.md,scripts/bench/size/run,scripts/bench/size/run.py,scripts/lake-build-wrapper.py 19 7 ['bryangingechen', 'felixpernegger', 'github-actions', 'grunweg', 'mathlib-merge-conflicts'] nobody
13-74798
13 days ago
24-41071
24 days ago
0-8924
2 hours
36000 eliasjudin
author:eliasjudin
 add reindexing, fibers pseudofunctor, internal categories, and single-morphism descent ## Summary - **FiberedCategory**: `PseudofunctorOfFibers.lean` (pseudofunctor of fibers for a fibered category), `Reindexing.lean` (reindexing functors and coherence isos) - **InternalCategory**: `Basic.lean` (minimal internal category structure over a category with pullbacks) - **Sites/Descent**: `SingleMorphism.lean` (descent data and comparison functor for a single morphism; `IsDescentMorphism` / `IsEffectiveDescentMorphism`) - **Mathlib.lean**: import updates Naming follows mathlib convention (e.g. `singleMorphismComparisonFunctor` in lowerCamelCase for definitions). t-category-theory new-contributor 783/0 Mathlib.lean,Mathlib/CategoryTheory/FiberedCategory/PseudofunctorOfFibers.lean,Mathlib/CategoryTheory/FiberedCategory/Reindexing.lean,Mathlib/CategoryTheory/InternalCategory/Basic.lean,Mathlib/CategoryTheory/Sites/Descent/SingleMorphism.lean 5 5 ['eliasjudin', 'github-actions', 'joelriou', 'mathlib-bors'] nobody
13-71875
13 days ago
13-74893
13 days ago
0-42869
11 hours
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 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/Sites/SmallAffineZariski.lean,Mathlib/CategoryTheory/Limits/Constructions/Over/Connected.lean 7 26 ['chrisflav', 'dagurtomas', 'erdOne', 'github-actions', 'mathlib-merge-conflicts', 'mathlib4-merge-conflict-bot'] alexjbest
assignee:alexjbest
13-51736
13 days ago
32-857
32 days ago
43-61703
43 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'] ocfnash
assignee:ocfnash
13-43646
13 days ago
17-8
16 days ago
17-1716
17 days
34784 tb65536
author:tb65536
 refactor(GroupTheory/Commutator/Basic): to_additivize commutators This PR makes some progress on to_additivizing more of the group theory library. I had to make the bracket instance scoped to avoid clashing with the Lie bracket. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra t-group-theory
label:t-algebra$
 195/37 Mathlib/Algebra/Group/Commutator.lean,Mathlib/Algebra/Group/Conj.lean,Mathlib/Algebra/Group/Subgroup/Basic.lean,Mathlib/GroupTheory/Commutator/Basic.lean,Mathlib/GroupTheory/Focal.lean,Mathlib/GroupTheory/GroupAction/Quotient.lean,Mathlib/GroupTheory/GroupAction/SubMulAction/OfStabilizer.lean,Mathlib/GroupTheory/Solvable.lean,Mathlib/Tactic/Translate/ToAdditive.lean,Mathlib/Topology/Algebra/Group/TopologicalAbelianization.lean,MathlibTest/Group.lean,MathlibTest/toAdditiveIrredDef.lean 12 3 ['github-actions', 'mathlib-merge-conflicts'] mattrobball
assignee:mattrobball
13-42703
13 days ago
13-43129
13 days ago
40-74561
40 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/Finset.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/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/ModularForms/JacobiTheta/OneVariable.lean,Mathlib/NumberTheory/Multiplicity.lean,Mathlib/NumberTheory/Padics/Hensel.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 2 ['github-actions', 'mathlib-merge-conflicts'] nobody
13-27648
13 days ago
57-7381
57 days ago
0-20
20 seconds
35593 chrisflav
author:chrisflav
 feat(RingTheory/Extension): naive cotangent complex commutes with flat base change From Pi1. --- - [x] depends on: #35544 - [x] depends on: #35557 - [ ] depends on: #35594 [![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 786/0 Mathlib/Algebra/Module/TransferInstance.lean,Mathlib/LinearAlgebra/TensorProduct/Quotient.lean,Mathlib/RingTheory/Extension/Basic.lean,Mathlib/RingTheory/Extension/Cotangent/BaseChange.lean,Mathlib/RingTheory/Extension/Cotangent/Basic.lean,Mathlib/RingTheory/Ideal/Cotangent.lean,Mathlib/RingTheory/Ideal/CotangentBaseChange.lean,Mathlib/RingTheory/Ideal/Maps.lean,Mathlib/RingTheory/IsTensorProduct.lean,Mathlib/RingTheory/TensorProduct/Quotient.lean 10 3 ['github-actions', 'mathlib-dependent-issues', 'mathlib-merge-conflicts'] nobody
13-21362
13 days ago
24-16826
24 days ago
0-1310
21 minutes
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
13-6774
13 days ago
13-8666
13 days ago
13-8621
13 days
35627 SnirBroshi
author:SnirBroshi
 feat(Combinatorics/SimpleGraph/Finite): min/max degrees of top/bot And a couple of lemmas about `IsRegularOfDegree`, e.g. the empty graph is regular of any degree. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-combinatorics 28/1 Mathlib/Combinatorics/SimpleGraph/Finite.lean,Mathlib/Combinatorics/SimpleGraph/StronglyRegular.lean 2 6 ['SnirBroshi', 'github-actions', 'vlad902'] nobody
13-1896
13 days ago
23-8645
23 days ago
23-8600
23 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
12-69697
12 days ago
121-60515
121 days ago
44-24509
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
12-68682
12 days ago
223-68568
223 days ago
0-449
7 minutes
26975 Whysoserioushah
author:Whysoserioushah
 feat: a norm_num extension for complex numbers co-authored-by : @thefundamentaltheor3m, @hrmacbeth --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-meta awaiting-author 424/12 Mathlib.lean,Mathlib/Analysis/RCLike/Basic.lean,Mathlib/Tactic.lean,Mathlib/Tactic/NormNum/Eq.lean,Mathlib/Tactic/NormNum/NormNumI.lean,Mathlib/Tactic/NormNum/Result.lean,MathlibTest/norm_numI.lean 7 57 ['JovanGerb', 'Vierkantor', 'Whysoserioushah', 'dupuisf', 'eric-wieser', 'github-actions', 'grunweg', 'hrmacbeth', 'mathlib4-merge-conflict-bot'] Vierkantor
assignee:Vierkantor
12-57162
12 days ago
12-57162
12 days ago
112-29409
112 days
34551 IlPreteRosso
author:IlPreteRosso
 refactor(Data.Finset.*Antidiagonal): rename defs to `set*Antidiagonal` and deprecate old names in namespace Finset Main file is [Prod.lean](https://leanprover-community.github.io/mathlib4_docs/Mathlib/Algebra/Order/Antidiag/Prod.html). Adds `Finset.HasMulAntidiagonal`, the multiplicative counterpart to `HasAntidiagonal`, linked via `@[to_additive existing]`. Split PR (current changes): This PR renames the set-based antidiagonal definitions to have a `set` prefix, distinguishing them from the typeclass-based API in `Prod.lean`. **Only definitions are renamed in this PR.** Theorem/lemma renames will follow in a subsequent PR. [MulAntidiagonal.lean](https://github.com/leanprover-community/mathlib4/blob/master/Mathlib/Data/Finset/MulAntidiagonal.lean) - `mulAntidiagonal` → `setMulAntidiagonal` - `addAntidiagonal` → `setAddAntidiagonal` (via `@[to_additive]`) [SMulAntidiagonal.lean](https://github.com/leanprover-community/mathlib4/blob/master/Mathlib/Data/Finset/SMulAntidiagonal.lean) - `SMulAntidiagonal` → `setSMulAntidiagonal` - `VAddAntidiagonal` → `setVAddAntidiagonal` (via `@[to_additive]`) Propagates to: - `Mathlib/RingTheory/HahnSeries/Multiplication.lean` - `Mathlib/RingTheory/HahnSeries/Summable.lean` --- Added deprecation aliases for the renamed definitions. [Finset/MulAntidiagonal.lean](https://github.com/leanprover-community/mathlib4/blob/master/Mathlib/Data/Finset/MulAntidiagonal.lean) ``` @[to_additive (attr := deprecated setAddAntidiagonal (since := "2026-01-31")), deprecated setMulAntidiagonal (since := "2026-01-31")] alias mulAntidiagonal := setMulAntidiagonal ``` [Finset/SMulAntidiagonal.lean](https://github.com/leanprover-community/mathlib4/blob/master/Mathlib/Data/Finset/SMulAntidiagonal.lean) ``` @[to_additive (attr := deprecated setVAddAntidiagonal (since := "2026-01-31")), deprecated setSMulAntidiagonal (since := "2026-01-31")] alias smulAntidiagonal := setSMulAntidiagonal ``` Propagates: [PointwiseSMul.lean](https://github.com/leanprover-community/mathlib4/blob/master/Mathlib/Data/Finsupp/PointwiseSMul.lean) - updated to use Set.vaddAntidiagonal (the original Set name) --- Full changes to be made: For a monoid `M`, `mulAntidiagonal n` returns the finset of pairs `(i, j)` such that `i * j = n`. [MulAntidiagonal.lean](https://leanprover-community.github.io/mathlib4_docs/Mathlib/Data/Finset/MulAntidiagonal.html) - `mulAntidiagonal` → `setMulAntidiagonal` - `addAntidiagonal` → `setAddAntidiagonal` (via `@[to_additive]`) - All related theorems renamed accordingly: - `mem_setMulAntidiagonal` - `setMulAntidiagonal_mono_left`/`setMulAntidiagonal_mono_right` - `swap_mem_setMulAntidiagonal` - `support_setMulAntidiagonal_subset_mul` - `isPWO_support_setMulAntidiagonal` - `setMulAntidiagonal_min_mul_min` [SMulAntidiagonal.lean](https://leanprover-community.github.io/mathlib4_docs/Mathlib/Data/Finset/SMulAntidiagonal.html) - `setSMulAntidiagonal` (lowercase `set` prefix) - `setVAddAntidiagonal` (via `@[to_additive setVAddAntidiagonal ...]`) - All related theorems use lowercase `set` prefix: - `mem_setSMulAntidiagonal` / `mem_setVAddAntidiagonal` - `setSMulAntidiagonal_mono_left`/`setSMulAntidiagonal_mono_right` / `setVAddAntidiagonal_mono_left`/`setVAddAntidiagonal_mono_right` - `support_setSMulAntidiagonal_subset_smul` / `support_setVAddAntidiagonal_subset_vadd` - `isPWO_support_setSMulAntidiagonal` / `isPWO_support_setVAddAntidiagonal` - `setSMulAntidiagonal_min_smul_min` / `setVAddAntidiagonal_min_vadd_min` [Prod.lean](https://leanprover-community.github.io/mathlib4_docs/Mathlib/Algebra/Order/Antidiag/Prod.html) - Added explicit `@[to_additive]` target names: - `@[to_additive antidiagonal_congr ...]` for `mulAntidiagonal_congr` - `@[to_additive (attr := ext) antidiagonal_subtype_ext ...]` for `mulAntidiagonal_subtype_ext` - `@[to_additive antidiagonal_congr' ...]` for `mulAntidiagonal_congr'` - `@[to_additive (attr := simps) sigmaAntidiagonalEquivProd ...]` for `sigmaMulAntidiagonalEquivProd` [Multiplication.lean](https://leanprover-community.github.io/mathlib4_docs/Mathlib/RingTheory/HahnSeries/Multiplication.html) - Updated all VAdd antidiagonal references to use lowercase `set` prefix: - `setVAddAntidiagonal` - `mem_setVAddAntidiagonal` - `setVAddAntidiagonal_mono_left`/`setVAddAntidiagonal_mono_right` - `isPWO_support_setVAddAntidiagonal` - `support_setVAddAntidiagonal_subset_vadd` - `setVAddAntidiagonal_min_vadd_min` - Updated all Add antidiagonal references: - `mem_setAddAntidiagonal` - `swap_mem_setAddAntidiagonal` [Summable.lean](https://leanprover-community.github.io/mathlib4_docs/Mathlib/RingTheory/HahnSeries/Summable.html) - `setVAddAntidiagonal` references updated - `mem_setAddAntidiagonal` references updated [PowerSeries.lean](https://leanprover-community.github.io/mathlib4_docs/Mathlib/RingTheory/HahnSeries/PowerSeries.html) - `mem_addAntidiagonal` → `mem_setAddAntidiagonal` t-algebra new-contributor awaiting-author merge-conflict
label:t-algebra$
 67/47 Mathlib/Algebra/Order/Antidiag/Prod.lean,Mathlib/Data/Finset/MulAntidiagonal.lean,Mathlib/Data/Finset/SMulAntidiagonal.lean,Mathlib/Data/Set/MulAntidiagonal.lean,Mathlib/RingTheory/HahnSeries/Multiplication.lean,Mathlib/RingTheory/HahnSeries/Summable.lean 6 8 ['IlPreteRosso', 'Ruben-VandeVelde', 'github-actions', 'jcommelin', 'kim-em', 'mathlib-merge-conflicts'] jcommelin
assignee:jcommelin
12-56891
12 days ago
26-82133
26 days ago
19-5432
19 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 using a proof by 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 95/0 Mathlib/Combinatorics/SimpleGraph/Acyclic.lean,Mathlib/Combinatorics/SimpleGraph/Walks/Operations.lean 2 4 ['SnirBroshi', 'github-actions', 'vbeffara', 'vlad902'] nobody
12-55881
12 days ago
30-23535
30 days ago
30-23490
30 days
35976 Phelixh
author:Phelixh
 feat: add add Liu's uncertainty theory foundations (core/distribution/process modules) --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor 2320/0 Mathlib/Uncertainty/base.lean,Mathlib/Uncertainty/base_core.lean,Mathlib/Uncertainty/base_distribution.lean,Mathlib/Uncertainty/base_process.lean,Mathlib/Uncertainty/uncertainty.lean 5 26 ['Phelixh', 'copilot-pull-request-reviewer', 'github-actions'] nobody
12-52145
12 days ago
13-76934
13 days ago
0-1739
28 minutes
35710 tb65536
author:tb65536
 feat(AlgebraicGeometry/EllipticCurve/Reduction): define split multiplicative reduction This PR adds the definition of split multiplicative reduction. --- - [ ] depends on: #35709 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra t-algebraic-geometry t-number-theory blocked-by-other-PR
label:t-algebra$
 90/0 Mathlib/AlgebraicGeometry/EllipticCurve/Reduction.lean 1 3 ['Multramate', 'github-actions', 'mathlib-dependent-issues'] nobody
12-48297
12 days ago
20-75953
20 days ago
0-45
45 seconds
36031 sgouezel
author:sgouezel
 feat: linter to make sure defs are `implicit_reducible` if they output classes Definitions outputting classes are here to be used as instances somewhere. If they are not implicit-reducible, then this use as instance is likely to encounter issues for defeq at instance reducibility. To fix this, this PR implements a linter detecting if class returning definitions are not marked as `implicit_reducible`, and fixes the whole library (using the iteration of a python script with manual tweaking). The linter is not perfect. In particular, the mechanism to disable it requires to be in a section. But I think it flags the right things. Marking setoids as implicit_reducible creates a performance issue (why is setoid a class, by the way?) so I disabled the linter around some of them. I'm not sure that it makes sense to mark all class returning defs as implicit_reducible (setoids are a counterexample, but Fintype is also probably not very sensible). We could have a whitelist of defs for which this is not needed if we decide we like this linter but want to improve it. On a side note, many many things in category theory are classes but have defs that construct them, so many many changes of the PR are in category theory. I have no opinion on whether this is desirable as I don't know the design decisions in this corner of the library. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict 1159/93 Mathlib/Algebra/Algebra/ZMod.lean,Mathlib/Algebra/BrauerGroup/Defs.lean,Mathlib/Algebra/Category/FGModuleCat/Colimits.lean,Mathlib/Algebra/Category/FGModuleCat/Limits.lean,Mathlib/Algebra/Category/Grp/Abelian.lean,Mathlib/Algebra/Category/ModuleCat/Abelian.lean,Mathlib/Algebra/Category/ModuleCat/EpiMono.lean,Mathlib/Algebra/Category/ModuleCat/Presheaf/Sheafify.lean,Mathlib/Algebra/CharP/Invertible.lean,Mathlib/Algebra/CharP/MixedCharZero.lean,Mathlib/Algebra/DirectSum/Decomposition.lean,Mathlib/Algebra/Field/IsField.lean,Mathlib/Algebra/FreeMonoid/Basic.lean,Mathlib/Algebra/GCDMonoid/Basic.lean,Mathlib/Algebra/Homology/ComplexShapeSigns.lean,Mathlib/Algebra/Lie/Basic.lean,Mathlib/Algebra/Lie/Classical.lean,Mathlib/Algebra/Lie/Extension.lean,Mathlib/Algebra/Module/GradedModule.lean,Mathlib/Algebra/Module/NatInt.lean,Mathlib/Algebra/Module/Submodule/Defs.lean,Mathlib/Algebra/Module/Torsion/Basic.lean,Mathlib/Algebra/MonoidAlgebra/Module.lean,Mathlib/Algebra/Order/Archimedean/Basic.lean,Mathlib/Algebra/Order/Floor/Defs.lean,Mathlib/Algebra/Polynomial/Div.lean,Mathlib/Algebra/SkewMonoidAlgebra/Basic.lean,Mathlib/Algebra/Star/RingQuot.lean,Mathlib/AlgebraicGeometry/Cover/Directed.lean,Mathlib/AlgebraicTopology/ModelCategory/Basic.lean,Mathlib/Analysis/CStarAlgebra/CStarMatrix.lean,Mathlib/Analysis/CStarAlgebra/Matrix.lean,Mathlib/Analysis/CStarAlgebra/Module/Defs.lean,Mathlib/Analysis/Complex/UpperHalfPlane/Metric.lean,Mathlib/Analysis/Distribution/TestFunction.lean,Mathlib/Analysis/InnerProductSpace/Basic.lean,Mathlib/Analysis/InnerProductSpace/Defs.lean,Mathlib/Analysis/InnerProductSpace/OfNorm.lean,Mathlib/Analysis/LocallyConvex/WithSeminorms.lean,Mathlib/Analysis/Matrix/Order.lean,Mathlib/Analysis/Matrix/PosDef.lean,Mathlib/Analysis/Normed/Algebra/Exponential.lean,Mathlib/Analysis/Normed/Field/Basic.lean,Mathlib/Analysis/Normed/Group/AddTorsor.lean,Mathlib/Analysis/Normed/Module/Basic.lean,Mathlib/Analysis/Normed/Ring/Basic.lean,Mathlib/Analysis/Normed/Unbundled/SpectralNorm.lean,Mathlib/Analysis/RCLike/Basic.lean,Mathlib/CategoryTheory/Abelian/Basic.lean,Mathlib/CategoryTheory/Abelian/NonPreadditive.lean,Mathlib/CategoryTheory/Abelian/Transfer.lean,Mathlib/CategoryTheory/Bicategory/Monad/Basic.lean,Mathlib/CategoryTheory/CatCommSq.lean,Mathlib/CategoryTheory/Center/Linear.lean,Mathlib/CategoryTheory/ConcreteCategory/Forget.lean,Mathlib/CategoryTheory/Enriched/Basic.lean,Mathlib/CategoryTheory/Enriched/FunctorCategory.lean,Mathlib/CategoryTheory/Enriched/Ordinary/Basic.lean,Mathlib/CategoryTheory/EpiMono.lean,Mathlib/CategoryTheory/FiberedCategory/HasFibers.lean,Mathlib/CategoryTheory/Functor/Functorial.lean,Mathlib/CategoryTheory/Groupoid.lean,Mathlib/CategoryTheory/Groupoid/Subgroupoid.lean,Mathlib/CategoryTheory/IsConnected.lean,Mathlib/CategoryTheory/Limits/Constructions/LimitsOfProductsAndEqualizers.lean,Mathlib/CategoryTheory/Limits/Creates.lean,Mathlib/CategoryTheory/Limits/Final.lean,Mathlib/CategoryTheory/Limits/FullSubcategory.lean,Mathlib/CategoryTheory/Limits/MorphismProperty.lean,Mathlib/CategoryTheory/Limits/Preorder.lean,Mathlib/CategoryTheory/Limits/Preserves/Creates/Finite.lean,Mathlib/CategoryTheory/Limits/Shapes/ConcreteCategory.lean,Mathlib/CategoryTheory/Limits/Shapes/NormalMono/Basic.lean,Mathlib/CategoryTheory/Limits/Shapes/ZeroMorphisms.lean,Mathlib/CategoryTheory/Localization/Bifunctor.lean,Mathlib/CategoryTheory/Localization/CalculusOfFractions/Preadditive.lean,Mathlib/CategoryTheory/Localization/HasLocalization.lean,Mathlib/CategoryTheory/Localization/Linear.lean,Mathlib/CategoryTheory/Localization/LocallySmall.lean,Mathlib/CategoryTheory/Localization/Monoidal/Functor.lean,Mathlib/CategoryTheory/Localization/Predicate.lean,Mathlib/CategoryTheory/Localization/Triangulated.lean,Mathlib/CategoryTheory/Localization/Trifunctor.lean,Mathlib/CategoryTheory/LocallyCartesianClosed/ChosenPullbacksAlong.lean,Mathlib/CategoryTheory/LocallyCartesianClosed/ExponentiableMorphism.lean,Mathlib/CategoryTheory/Monad/Comonadicity.lean,Mathlib/CategoryTheory/Monad/Limits.lean,Mathlib/CategoryTheory/Monad/Monadicity.lean,Mathlib/CategoryTheory/Monoidal/Action/End.lean,Mathlib/CategoryTheory/Monoidal/Action/Opposites.lean,Mathlib/CategoryTheory/Monoidal/Bimod.lean,Mathlib/CategoryTheory/Monoidal/Braided/Basic.lean,Mathlib/CategoryTheory/Monoidal/Braided/Multifunctor.lean,Mathlib/CategoryTheory/Monoidal/Braided/Reflection.lean,Mathlib/CategoryTheory/Monoidal/Cartesian/Basic.lean,Mathlib/CategoryTheory/Monoidal/Cartesian/CommGrp_.lean,Mathlib/CategoryTheory/Monoidal/Cartesian/Grp_.lean,Mathlib/CategoryTheory/Monoidal/Cartesian/Mon_.lean,Mathlib/CategoryTheory/Monoidal/Closed/Basic.lean,Mathlib/CategoryTheory/Monoidal/Closed/Cartesian.lean 341 2 ['github-actions', 'mathlib-merge-conflicts'] nobody
12-34657
12 days ago
12-77988
12 days ago
0-13675
3 hours
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
12-28679
12 days ago
12-27897
12 days ago
0-1899
31 minutes
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 95/137 Mathlib/Algebra/Group/Conj.lean,Mathlib/Algebra/Group/End.lean,Mathlib/Algebra/Group/Equiv/Defs.lean,Mathlib/Tactic/Translate/ToAdditive.lean 4 2 ['github-actions', 'mathlib-dependent-issues'] nobody
12-27016
12 days ago
12-27532
12 days ago
0-1216
20 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 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 3 ['github-actions', 'leanprover-radar', 'robin-carlier'] nobody
12-17344
12 days ago
12-44787
12 days ago
0-2
2 seconds
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 t-number-theory 653/0 Mathlib.lean,Mathlib/NumberTheory/AKSPrimality.lean 2 35 ['github-actions', 'jcommelin', 'kim-em', 'metakunt', 'qawbecrdtey', 'vihdzp'] kim-em
assignee:kim-em
12-8959
12 days ago
18-3116
18 days ago
21-76643
21 days
36167 WenrongZou
author:WenrongZou
 feat(RingTheory/FormalGroup): construction of additive inverse of formal group construction of additive inverse --- - [ ] depends on: #35912 [![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/PowerSeries/Basic.lean,Mathlib/RingTheory/PowerSeries/Evaluation.lean,Mathlib/RingTheory/PowerSeries/Substitution.lean,Mathlib/RingTheory/PowerSeries/Trunc.lean 7 2 ['github-actions', 'mathlib-dependent-issues'] nobody
12-6623
12 days ago
12-6624
12 days ago
0-1359
22 minutes
28462 joelriou
author:joelriou
 feat(AlgebraicTopology/SimplicialSet): the relative cell complex attached to a rank function for a pairing WIP From https://github.com/joelriou/topcat-model-category --- - [x] depends on: #32515 - [x] depends on: #32517 - [x] depends on: #32178 - [x] depends on: #32180 - [x] depends on: #31122 - [x] depends on: #28351 - [x] depends on: #28346 - [x] depends on: #28336 - [x] depends on: #28332 - [x] depends on: #28330 - [x] depends on: #28224 - [x] depends on: #27968 - [x] depends on: #28034 - [x] depends on: #26076 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebraic-topology WIP 417/0 Mathlib.lean,Mathlib/AlgebraicTopology/SimplicialSet/AnodyneExtensions/IsUniquelyCodimOneFace.lean,Mathlib/AlgebraicTopology/SimplicialSet/AnodyneExtensions/RelativeCellComplex.lean,Mathlib/AlgebraicTopology/SimplicialSet/Boundary.lean,Mathlib/AlgebraicTopology/SimplicialSet/Horn.lean,Mathlib/AlgebraicTopology/SimplicialSet/Simplices.lean,Mathlib/AlgebraicTopology/SimplicialSet/StdSimplex.lean,Mathlib/AlgebraicTopology/SimplicialSet/Subcomplex.lean,Mathlib/AlgebraicTopology/SimplicialSet/SubcomplexEvaluation.lean,Mathlib/Data/Fintype/Basic.lean,Mathlib/Order/Fin/Basic.lean 11 10 ['github-actions', 'mathlib-merge-conflicts', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
11-73570
11 days ago
213-76108
213 days ago
0-1
1 second
35559 mike1729
author:mike1729
 feat(Analysis/Normed): weak-topology embedding into weak-star bidual and compactenss transfer theorem This PR refactors the double dual material and adds new results connecting the weak topology on a normed space to the weak-star topology on its bidual. ## Changes ### New file: `Analysis.Normed.Module.DoubleDual` Extracts the canonical embedding `inclusionInDoubleDual` and the bidual isometry `inclusionInDoubleDualLi` from `Analysis.Normed.Module.Dual` into a dedicated file, and adds: - `inclusionInDoubleDualWeak`: the canonical map from `WeakSpace 𝕜 X` into `WeakDual 𝕜 (StrongDual 𝕜 X)`. - `inclusionInDoubleDualWeak_isEmbedding`: this map is a topological embedding. - `inclusionInDoubleDualWeak_homeomorph`: the map as a homeomorphism onto its range. - `isCompact_closure_of_isBounded`: bounded sets whose bidual image has weak-star closure in range have weakly compact closure, via Banach–Alaoglu. ### Modified: `Analysis.Normed.Module.Dual` The double dual inclusion material is moved out; polar set results remain. References to `inclusionInDoubleDual` in `polar_closure` are replaced by `ContinuousLinearMap.apply` to avoid a dependency on the new file. --- CC: @faenuccio this may be relevant for your Goldstine formalization. t-analysis new-contributor 240/91 Mathlib.lean,Mathlib/Analysis/LocallyConvex/SeparatingDual.lean,Mathlib/Analysis/LocallyConvex/Separation.lean,Mathlib/Analysis/Normed/Module/DoubleDual.lean,Mathlib/Analysis/Normed/Module/Dual.lean,Mathlib/Analysis/Normed/Module/WeakDual.lean,Mathlib/Analysis/Normed/Module/WeakSpace.lean,Mathlib/MeasureTheory/Integral/IntervalIntegral/FundThmCalculus.lean,Mathlib/MeasureTheory/Measure/CharacteristicFunction/Basic.lean,Mathlib/Probability/Distributions/Gaussian/CharFun.lean 10 23 ['ADedecker', 'github-actions', 'j-loreaux', 'mathlib-merge-conflicts', 'mike1729'] faenuccio
assignee:faenuccio
11-64840
11 days ago
12-52707
12 days ago
11-12992
11 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 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 4 ['github-actions', 'joelriou'] nobody
11-64644
11 days ago
12-52090
12 days ago
0-3328
55 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 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 4 ['github-actions', 'mathlib-dependent-issues', 'mathlib-merge-conflicts'] nobody
11-59302
11 days ago
34-72057
34 days ago
0-2
2 seconds
34841 RemyDegenne
author:RemyDegenne
 feat(InformationTheory): chain rule for the Kullback-Leibler divergence --- - [x] depends on: #35014 - [x] depends on: #35015 - [ ] depends on: #36197 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) WIP t-measure-probability large-import blocked-by-other-PR 411/1 Mathlib.lean,Mathlib/Analysis/Convex/Approximation.lean,Mathlib/InformationTheory/KullbackLeibler/ChainRule.lean,Mathlib/MeasureTheory/Measure/Decomposition/IntegralRNDeriv.lean,Mathlib/MeasureTheory/Measure/Decomposition/RadonNikodym.lean 5 3 ['github-actions', 'mathlib-dependent-issues', 'mathlib-merge-conflicts'] nobody
11-58741
11 days ago
40-56647
40 days ago
0-1
1 second
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 1 ['github-actions'] nobody
11-56285
11 days ago
11-55902
11 days ago
0-454
7 minutes
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 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 79 ['botbaki-review', 'github-actions', 'grunweg', 'michaellee94', 'ocfnash'] ocfnash
assignee:ocfnash
11-51972
11 days ago
13-31885
13 days ago
15-3412
15 days
36072 erdOne
author:erdOne
 feat(AlgebraicGeometry): essential smallness of affine schemes locally of finite type over a base Co-authored-by: Joël Riou --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) delegated 151/2 Mathlib.lean,Mathlib/Algebra/Category/CommAlgCat/FiniteType.lean,Mathlib/Algebra/Category/Ring/Small.lean,Mathlib/AlgebraicGeometry/Morphisms/FiniteType.lean,Mathlib/CategoryTheory/MorphismProperty/Comma.lean,Mathlib/CategoryTheory/ObjectProperty/Small.lean 6 6 ['github-actions', 'joelriou', 'mathlib-bors', 'riccardobrasca'] nobody
11-51847
11 days ago
13-44060
13 days ago
13-45348
13 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
11-41079
11 days ago
unknown
0-0
0 seconds
35600 yisiox
author:yisiox
 feat(Computability): add Kleene's algorithm to prove regular languages have regex matching This PR adds a proof that every regular language has some regular expression matching it. This was achieved by the following constructions and proofs of their correctness - Define `toSingleεNFA` to transform any epsilon-NFA to an equivalent one with only a single start and accept state (and the type is `ExtendedState`) - Define a bijection between `ExtendedState` and `Fin (FinEnum.card (ExtendedState σ))` to index the states - Define `pathRegex` which implements Kleene's algorithm - Define `toRegex` which takes an epsilon-NFA, applies `toSingleεNFA` on it, and computes the corresponding regex using `pathRegex` The proofs of correctness chain together to yield `(toRegex M).matches' = M.accepts` which asserts the direction of Kleene's theorem required. As in [#mathlib4 > Regular languages: the review queue @ 💬](https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/Regular.20languages.3A.20the.20review.20queue/near/573958148), this overlaps with #15654, which uses GNFA instead but has been inactive. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-computability new-contributor 499/0 Mathlib/Computability/EpsilonNFA.lean 1 2 ['github-actions'] nobody
11-40592
11 days ago
unknown
0-0
0 seconds
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 --- 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 69 ['fpvandoorn', 'github-actions', 'jcommelin', 'leanprover-bot', 'leanprover-radar', 'mathlib-merge-conflicts', 'mathlib4-merge-conflict-bot', 'themathqueen'] joelriou
assignee:joelriou
11-38249
11 days ago
110-58324
110 days ago
66-7772
66 days
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
11-38116
11 days ago
136-19971
136 days ago
17-75931
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
11-38115
11 days ago
133-38976
133 days ago
23-31743
23 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
11-30707
11 days ago
65-77419
65 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 151/0 Mathlib.lean,Mathlib/Combinatorics/SimpleGraph/Contraction.lean,Mathlib/Combinatorics/SimpleGraph/Minor.lean 3 2 ['github-actions'] nobody
11-23649
11 days ago
11-23711
11 days ago
11-24357
11 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
11-22147
11 days ago
48-60022
48 days ago
0-252
4 minutes
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/) blocked-by-other-PR t-analysis 647/66 Mathlib.lean,Mathlib/Analysis/InnerProductSpace/l2Space.lean,Mathlib/Analysis/MeanInequalities.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/Data/Real/ConjExponents.lean 8 3 ['github-actions', 'mathlib-dependent-issues', 'mathlib-merge-conflicts'] nobody
11-22144
11 days ago
32-36380
32 days ago
0-103
1 minute
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
11-22132
11 days ago
24-49309
24 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
11-22116
11 days ago
18-60221
18 days ago
0-2518
41 minutes
36107 sgouezel
author:sgouezel
 chore: mark definitions outputting classes as `implicit_reducible` Definitions outputting classes are here to be used as instances somewhere. If they are not implicit-reducible, then this use as instance is likely to encounter issues for defeq at instance reducibility. This PR marks all class returning definitions of the library as implicit_reducible, using the linter of #36031 and iteration of a python script with manual tweaking. Marking setoids as implicit_reducible creates a performance issue (why is setoid a class, by the way?) so I kept some of them unchanged. I'm not sure that it makes sense to mark all class returning defs as implicit_reducible (setoids are a counterexample, but Fintype is also probably not very sensible). On a side note, many many things in category theory are classes but have defs that construct them, so many many changes of the PR are in category theory. I have no opinion on whether this is desirable as I don't know the design decisions in this corner of the library. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict 760/515 Mathlib/Algebra/Algebra/ZMod.lean,Mathlib/Algebra/BrauerGroup/Defs.lean,Mathlib/Algebra/Category/AlgCat/Symmetric.lean,Mathlib/Algebra/Category/FGModuleCat/Colimits.lean,Mathlib/Algebra/Category/FGModuleCat/Limits.lean,Mathlib/Algebra/Category/Grp/Abelian.lean,Mathlib/Algebra/Category/HopfAlgCat/Monoidal.lean,Mathlib/Algebra/Category/ModuleCat/Abelian.lean,Mathlib/Algebra/Category/ModuleCat/EpiMono.lean,Mathlib/Algebra/Category/ModuleCat/Monoidal/Basic.lean,Mathlib/Algebra/Category/ModuleCat/Presheaf/Sheafify.lean,Mathlib/Algebra/Category/Ring/LinearAlgebra.lean,Mathlib/Algebra/CharP/Invertible.lean,Mathlib/Algebra/CharP/MixedCharZero.lean,Mathlib/Algebra/DirectSum/Decomposition.lean,Mathlib/Algebra/Field/Equiv.lean,Mathlib/Algebra/Field/IsField.lean,Mathlib/Algebra/FreeMonoid/Basic.lean,Mathlib/Algebra/GCDMonoid/Basic.lean,Mathlib/Algebra/Homology/ComplexShapeSigns.lean,Mathlib/Algebra/Homology/Functor.lean,Mathlib/Algebra/Lie/Basic.lean,Mathlib/Algebra/Lie/Classical.lean,Mathlib/Algebra/Lie/Derivation/Basic.lean,Mathlib/Algebra/Lie/Extension.lean,Mathlib/Algebra/Lie/Free.lean,Mathlib/Algebra/Lie/NonUnitalNonAssocAlgebra.lean,Mathlib/Algebra/Module/GradedModule.lean,Mathlib/Algebra/Module/NatInt.lean,Mathlib/Algebra/Module/Submodule/Defs.lean,Mathlib/Algebra/Module/Torsion/Basic.lean,Mathlib/Algebra/Module/ZLattice/Basic.lean,Mathlib/Algebra/MonoidAlgebra/Module.lean,Mathlib/Algebra/Order/Archimedean/Basic.lean,Mathlib/Algebra/Order/Floor/Defs.lean,Mathlib/Algebra/Polynomial/Div.lean,Mathlib/Algebra/SkewMonoidAlgebra/Basic.lean,Mathlib/Algebra/Star/NonUnitalSubalgebra.lean,Mathlib/Algebra/Star/RingQuot.lean,Mathlib/AlgebraicGeometry/Artinian.lean,Mathlib/AlgebraicGeometry/Cover/Directed.lean,Mathlib/AlgebraicGeometry/FunctionField.lean,Mathlib/AlgebraicGeometry/Geometrically/Basic.lean,Mathlib/AlgebraicGeometry/Limits.lean,Mathlib/AlgebraicGeometry/LimitsOver.lean,Mathlib/AlgebraicGeometry/Morphisms/ClosedImmersion.lean,Mathlib/AlgebraicGeometry/Morphisms/Finite.lean,Mathlib/AlgebraicGeometry/Morphisms/QuasiCompact.lean,Mathlib/AlgebraicGeometry/Morphisms/QuasiSeparated.lean,Mathlib/AlgebraicGeometry/Morphisms/SchemeTheoreticallyDominant.lean,Mathlib/AlgebraicGeometry/Morphisms/UniversallyOpen.lean,Mathlib/AlgebraicGeometry/Normalization.lean,Mathlib/AlgebraicGeometry/ProjectiveSpectrum/Topology.lean,Mathlib/AlgebraicGeometry/Properties.lean,Mathlib/AlgebraicTopology/ModelCategory/Basic.lean,Mathlib/Analysis/AbsoluteValue/Equivalence.lean,Mathlib/Analysis/CStarAlgebra/CStarMatrix.lean,Mathlib/Analysis/CStarAlgebra/ContinuousFunctionalCalculus/Continuity.lean,Mathlib/Analysis/CStarAlgebra/ContinuousFunctionalCalculus/Integral.lean,Mathlib/Analysis/CStarAlgebra/ContinuousFunctionalCalculus/Range.lean,Mathlib/Analysis/CStarAlgebra/ContinuousMap.lean,Mathlib/Analysis/CStarAlgebra/Matrix.lean,Mathlib/Analysis/CStarAlgebra/Module/Defs.lean,Mathlib/Analysis/Calculus/FDeriv/Symmetric.lean,Mathlib/Analysis/Calculus/LogDeriv.lean,Mathlib/Analysis/Calculus/MeanValue.lean,Mathlib/Analysis/Calculus/SmoothSeries.lean,Mathlib/Analysis/Calculus/UniformLimitsDeriv.lean,Mathlib/Analysis/Complex/UpperHalfPlane/Metric.lean,Mathlib/Analysis/Distribution/SchwartzSpace/Basic.lean,Mathlib/Analysis/Distribution/TestFunction.lean,Mathlib/Analysis/InnerProductSpace/Basic.lean,Mathlib/Analysis/InnerProductSpace/Coalgebra.lean,Mathlib/Analysis/InnerProductSpace/Defs.lean,Mathlib/Analysis/InnerProductSpace/OfNorm.lean,Mathlib/Analysis/InnerProductSpace/TensorProduct.lean,Mathlib/Analysis/InnerProductSpace/TwoDim.lean,Mathlib/Analysis/LocallyConvex/WithSeminorms.lean,Mathlib/Analysis/Matrix/LDL.lean,Mathlib/Analysis/Matrix/Order.lean,Mathlib/Analysis/Matrix/PosDef.lean,Mathlib/Analysis/MellinTransform.lean,Mathlib/Analysis/Normed/Algebra/Exponential.lean,Mathlib/Analysis/Normed/Algebra/QuaternionExponential.lean,Mathlib/Analysis/Normed/Field/Basic.lean,Mathlib/Analysis/Normed/Group/AddTorsor.lean,Mathlib/Analysis/Normed/Module/Basic.lean,Mathlib/Analysis/Normed/Module/HahnBanach.lean,Mathlib/Analysis/Normed/Module/MultipliableUniformlyOn.lean,Mathlib/Analysis/Normed/Module/PiTensorProduct/InjectiveSeminorm.lean,Mathlib/Analysis/Normed/Ring/Basic.lean,Mathlib/Analysis/Normed/Unbundled/SpectralNorm.lean,Mathlib/Analysis/ODE/PicardLindelof.lean,Mathlib/Analysis/Quaternion.lean,Mathlib/Analysis/RCLike/Basic.lean,Mathlib/Analysis/SpecialFunctions/Complex/LogBounds.lean,Mathlib/Analysis/SpecialFunctions/ContinuousFunctionalCalculus/ExpLog/Basic.lean,Mathlib/Analysis/SpecialFunctions/Gamma/Deriv.lean,Mathlib/Analysis/SpecialFunctions/ImproperIntegrals.lean,Mathlib/CategoryTheory/Abelian/Basic.lean 472 5 ['github-actions', 'leanprover-radar', 'mathlib-merge-conflicts', 'sgouezel'] nobody
11-22109
11 days ago
11-77740
11 days ago
12-37385
12 days
35594 chrisflav
author:chrisflav
 feat(RingTheory): `Extension.CotangentSpace` commutes with base change From Pi1. --- - [x] depends on: #35557 - [x] depends on: #35699 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-ring-theory 136/0 Mathlib.lean,Mathlib/RingTheory/Extension/Basic.lean,Mathlib/RingTheory/Extension/Cotangent/BaseChange.lean,Mathlib/RingTheory/Extension/Cotangent/Basic.lean 4 2 ['github-actions', 'mathlib-dependent-issues'] riccardobrasca
assignee:riccardobrasca
11-18724
11 days ago
14-49543
14 days ago
14-50885
14 days
35713 Parcly-Taxel
author:Parcly-Taxel
 feat: Bird–Wadler duality theorems Forms of these three theorems already exist in mathlib and the Lean standard library, but they are scattered about. Bring them together in one file, deprecating the _ad hoc_ names for the first and second theorems. t-data 167/82 Mathlib.lean,Mathlib/Data/List/Basic.lean,Mathlib/Data/List/BirdWadler.lean,docs/references.bib 4 1 ['github-actions'] Vierkantor
assignee:Vierkantor
11-18720
11 days ago
20-69774
20 days ago
20-69985
20 days
35874 xgenereux
author:xgenereux
 feat(Adjoin/Polynomial/Bivariate): IsAlgebraic.adjoin_singleton This PR builds up to the following theorem: - `IsAlgebraic.adjoin_singleton`: Given two transcendental elements `a`, `b` over `R`, if one of them, say `a`, is algebraic over `R[b]` then `b` is algebraic over `R[a]`. In particular, it uses maps between `R[a]` and `R[X]` as well of some of the Bivariate polynomial API. The results are necessary in preparation for the following: Given a function field `K` and `(y : K)` such that `(hy : Transcendental Fq y)` then we have: ``` FiniteDimensional Fq⟮y⟯ K ``` 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-algebra
label:t-algebra$
 90/0 Mathlib.lean,Mathlib/RingTheory/Adjoin/Polynomial/Bivariate.lean 2 6 ['github-actions', 'joneugster', 'mathlib-merge-conflicts', 'robin-carlier', 'xgenereux'] riccardobrasca
assignee:riccardobrasca
11-18713
11 days ago
14-70978
14 days ago
14-71458
14 days
35962 euprunin
author:euprunin
 chore: golf using `simp` The goal of this PR is to decrease the number of times lemmas are called explicitly (replacing calls to lemmas with calls to tactics). 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.MonoidalCategory.leftUnitor_monoidal`: unchanged 🎉 * `MeasureTheory.Measure.haar.is_left_invariant_index`: unchanged 🎉 * `Ideal.Filtration.submodule_fg_iff_stable`: unchanged 🎉 Profiled using `set_option trace.profiler true in`. This PR is batched under the following guidelines: * Up to ~5 changed files per PR * Up to ~25 changed declarations per PR * Up to ~100 changed lines per PR --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) 4/10 Mathlib/CategoryTheory/Monoidal/Braided/Basic.lean,Mathlib/MeasureTheory/Measure/Haar/Basic.lean,Mathlib/RingTheory/Filtration.lean 3 1 ['github-actions'] dwrensha
assignee:dwrensha
11-18705
11 days ago
14-78022
14 days ago
14-77977
14 days
35998 gasparattila
author:gasparattila
 feat: affine isomorphisms between spaces of affine maps These isomorphisms are analogous to `LinearEquiv.arrowCongr` and `LinearEquiv.congrLeft`. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra
label:t-algebra$
 123/0 Mathlib/LinearAlgebra/AffineSpace/AffineEquiv.lean 1 1 ['github-actions'] joelriou
assignee:joelriou
11-18702
11 days ago
14-40045
14 days ago
14-40000
14 days
36014 euprunin
author:euprunin
 chore: golf proofs The goal of this PR is to decrease the number of times lemmas are called explicitly (replacing calls to lemmas with calls to tactics). 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): * `Polynomial.smeval_commute_left`: unchanged 🎉 * `lp.norm_rpow_eq_tsum`: unchanged 🎉 * `ComputablePred.rice`: unchanged 🎉 * `ZNum.cmp_to_int`: unchanged 🎉 * `ZMod.inv_coe_unit`: unchanged 🎉 * `Ideal.Filtration.submodule_fg_iff_stable`: 343 ms before, 197 ms after 🎉 * `t2Space_of_properSMul_of_t1Group`: unchanged 🎉 Profiled using `set_option trace.profiler true in`. This PR is batched under the following guidelines: * Up to ~5 changed files per PR * Up to ~25 changed declarations per PR * Up to ~100 changed lines per PR --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) 10/43 Mathlib/Algebra/Polynomial/Smeval.lean,Mathlib/Analysis/Normed/Lp/lpSpace.lean,Mathlib/Computability/Halting.lean,Mathlib/Data/Num/ZNum.lean,Mathlib/Data/ZMod/Basic.lean,Mathlib/RingTheory/Filtration.lean,Mathlib/Topology/Algebra/ProperAction/Basic.lean 7 1 ['github-actions'] kex-y
assignee:kex-y
11-18701
11 days ago
14-25550
14 days ago
14-25505
14 days
35985 urkud
author:urkud
 feat: vector bundle of `ContinuousAlternatingMap`s --- - [ ] depends on: #35984 - [ ] depends on: #34491 - [ ] depends on: #34513 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict 872/192 Mathlib/Analysis/Normed/Module/Alternating/Basic.lean,Mathlib/Analysis/Normed/Module/Multilinear/Basic.lean,Mathlib/Analysis/Normed/Operator/BoundedLinearMaps.lean,Mathlib/Topology/Algebra/Group/Basic.lean,Mathlib/Topology/Algebra/Module/Alternating/Topology.lean,Mathlib/Topology/Algebra/Module/Multilinear/Topology.lean,Mathlib/Topology/Algebra/Module/StrongTopology.lean,Mathlib/Topology/VectorBundle/Basic.lean,Mathlib/Topology/VectorBundle/ContinuousAlternatingMap.lean,Mathlib/Topology/VectorBundle/Hom.lean 10 4 ['github-actions', 'mathlib-bors', 'mathlib-dependent-issues', 'mathlib-merge-conflicts'] nobody
11-12954
11 days ago
14-53776
14 days ago
0-106
1 minute
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 - [ ] 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$
 632/24 Mathlib/RingTheory/Ideal/Operations.lean,Mathlib/RingTheory/Ideal/Quotient/Operations.lean,Mathlib/RingTheory/Regular/Category.lean,Mathlib/RingTheory/Regular/Depth.lean,Mathlib/RingTheory/Regular/RegularSequence.lean 5 7 ['Thmoas-Guan', 'github-actions', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
10-82665
10 days ago
269-62922
269 days ago
0-152
2 minutes
35405 xroblot
author:xroblot
 feat(RamificationInertia): add `ramificationIdx_le_ramificationIdx` and `inertiaDeg_le_inertiaDeg` Assume that `Q` is over `P` that is over `p`. We prove that: - `Ideal.ramificationIdx P Q ≤ Ideal.ramificationIdx p Q` - `Ideal.inertiaDeg P Q ≤ Ideal.inertiaDeg p Q` These results follow from [Ideal.ramificationIdx_algebra_tower](https://leanprover-community.github.io/mathlib4_docs/Mathlib/NumberTheory/RamificationInertia/Basic.html#Ideal.ramificationIdx_algebra_tower) and [Ideal.inertiaDeg_algebra_tower](https://leanprover-community.github.io/mathlib4_docs/Mathlib/NumberTheory/RamificationInertia/Basic.html#Ideal.inertiaDeg_algebra_tower) but they are proved here in a more general situation. --- - [x] depends on: #35483 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-number-theory 31/0 Mathlib/NumberTheory/RamificationInertia/Basic.lean 1 4 ['github-actions', 'mathlib-dependent-issues', 'mathlib-merge-conflicts'] alexjbest
assignee:alexjbest
10-81604
10 days ago
10-81626
10 days ago
27-47614
27 days
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$
 1029/24 Mathlib.lean,Mathlib/RingTheory/Ideal/Operations.lean,Mathlib/RingTheory/Ideal/Quotient/Operations.lean,Mathlib/RingTheory/Regular/AuslanderBuchsbaum.lean,Mathlib/RingTheory/Regular/Category.lean,Mathlib/RingTheory/Regular/Depth.lean,Mathlib/RingTheory/Regular/RegularSequence.lean 7 9 ['Thmoas-Guan', 'github-actions', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
10-80590
10 days ago
269-62923
269 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$
 918/24 Mathlib/RingTheory/Ideal/Operations.lean,Mathlib/RingTheory/Ideal/Quotient/Operations.lean,Mathlib/RingTheory/Regular/Category.lean,Mathlib/RingTheory/Regular/Depth.lean,Mathlib/RingTheory/Regular/RegularSequence.lean 5 7 ['Thmoas-Guan', 'github-actions', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
10-80563
10 days ago
269-64868
269 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 - [ ] 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$
 908/24 Mathlib.lean,Mathlib/RingTheory/Ideal/Operations.lean,Mathlib/RingTheory/Ideal/Quotient/Operations.lean,Mathlib/RingTheory/Regular/Category.lean,Mathlib/RingTheory/Regular/Depth.lean,Mathlib/RingTheory/Regular/Ischebeck.lean,Mathlib/RingTheory/Regular/RegularSequence.lean 7 9 ['Thmoas-Guan', 'github-actions', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
10-80534
10 days ago
269-64746
269 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$
 1776/24 Mathlib.lean,Mathlib/RingTheory/CohenMacaulay/Basic.lean,Mathlib/RingTheory/Ideal/Operations.lean,Mathlib/RingTheory/Ideal/Quotient/Operations.lean,Mathlib/RingTheory/Regular/Category.lean,Mathlib/RingTheory/Regular/Depth.lean,Mathlib/RingTheory/Regular/Ischebeck.lean,Mathlib/RingTheory/Regular/RegularSequence.lean 8 16 ['Thmoas-Guan', 'github-actions', 'leanprover-community-bot-assistant', 'mathlib-merge-conflicts', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
10-80293
10 days ago
269-64590
269 days ago
0-52
52 seconds
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
label:t-algebra$
 2171/24 Mathlib.lean,Mathlib/RingTheory/CohenMacaulay/Basic.lean,Mathlib/RingTheory/CohenMacaulay/Catenary.lean,Mathlib/RingTheory/Ideal/Operations.lean,Mathlib/RingTheory/Ideal/Quotient/Operations.lean,Mathlib/RingTheory/Regular/Category.lean,Mathlib/RingTheory/Regular/Depth.lean,Mathlib/RingTheory/Regular/Ischebeck.lean,Mathlib/RingTheory/Regular/RegularSequence.lean 9 16 ['github-actions', 'leanprover-community-bot-assistant', 'mathlib-merge-conflicts', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
10-80195
10 days ago
268-78802
268 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
label:t-algebra$
 2349/24 Mathlib.lean,Mathlib/RingTheory/CohenMacaulay/Basic.lean,Mathlib/RingTheory/CohenMacaulay/Catenary.lean,Mathlib/RingTheory/CohenMacaulay/Unmixed.lean,Mathlib/RingTheory/Ideal/Operations.lean,Mathlib/RingTheory/Ideal/Quotient/Operations.lean,Mathlib/RingTheory/Regular/Category.lean,Mathlib/RingTheory/Regular/Depth.lean,Mathlib/RingTheory/Regular/Ischebeck.lean,Mathlib/RingTheory/Regular/RegularSequence.lean 10 14 ['github-actions', 'leanprover-community-bot-assistant', 'mathlib-merge-conflicts', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
10-80140
10 days ago
249-72597
249 days ago
0-229
3 minutes
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 large-import blocked-by-other-PR 1993/24 Mathlib.lean,Mathlib/RingTheory/CohenMacaulay/Basic.lean,Mathlib/RingTheory/CohenMacaulay/Polynomial.lean,Mathlib/RingTheory/Ideal/Operations.lean,Mathlib/RingTheory/Ideal/Quotient/Operations.lean,Mathlib/RingTheory/Regular/Category.lean,Mathlib/RingTheory/Regular/Depth.lean,Mathlib/RingTheory/Regular/Ischebeck.lean,Mathlib/RingTheory/Regular/RegularSequence.lean 9 14 ['Thmoas-Guan', 'erdOne', 'github-actions', 'mathlib-dependent-issues', 'mathlib-merge-conflicts', 'mathlib4-merge-conflict-bot'] mariainesdff
assignee:mariainesdff
10-79440
10 days ago
26-12673
26 days ago
3-48641
3 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 272/0 Mathlib.lean,Mathlib/Algebra/Category/ModuleCat/Baer.lean,Mathlib/Algebra/Homology/ShortComplex/ModuleCat.lean,Mathlib/RingTheory/GlobalDimension.lean 4 16 ['Thmoas-Guan', 'erdOne', 'github-actions', 'mathlib-merge-conflicts', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] erdOne
assignee:erdOne
10-79178
10 days ago
77-76537
77 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 317/0 Mathlib.lean,Mathlib/Algebra/Category/ModuleCat/Baer.lean,Mathlib/Algebra/Homology/ShortComplex/ModuleCat.lean,Mathlib/RingTheory/GlobalDimension.lean 4 16 ['Thmoas-Guan', 'github-actions', 'jcommelin', 'mathlib-merge-conflicts', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
10-78367
10 days ago
111-74837
111 days ago
1-68813
1 day
33749 plp127
author:plp127
 feat: `NNRat` is countable We provide an `Encodable NNRat` instance. As a consequence we also get the instance `Countable NNRat`. See also [Zulip](https://leanprover.zulipchat.com/#narrow/channel/113489-new-members/topic/NNRat.20not.20countable.3F/near/566916284) --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-data large-import awaiting-author 13/0 Mathlib/Data/Rat/Encodable.lean 1 5 ['eric-wieser', 'github-actions', 'grunweg', 'joneugster', 'leanprover-radar'] joneugster
assignee:joneugster
10-75212
10 days ago
52-41966
52 days ago
15-24863
15 days
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 15/1 Mathlib/Data/Fintype/Option.lean 1 3 ['github-actions', 'joneugster'] joneugster
assignee:joneugster
10-75045
10 days ago
45-55388
45 days ago
2-59629
2 days
35661 chrisflav
author:chrisflav
 feat(Geometry/Manifold): a smooth map induces a morphism of locally ringed spaces --- I have put things in the `IsManifold` namespace, because `IsManifold.locallyRingedSpace` is in that namespace. It seems to me that this namespace is not very fitting, because `IsManifold` is not mentioned once. Since I am unfamiliar with this part of the library, I refrained from changing it, but I am happy to do so if preferred. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebraic-geometry t-differential-geometry 156/3 Mathlib/Geometry/Manifold/ContMDiff/Basic.lean,Mathlib/Geometry/Manifold/LocalInvariantProperties.lean,Mathlib/Geometry/Manifold/Sheaf/LocallyRingedSpace.lean,Mathlib/Geometry/Manifold/Sheaf/Smooth.lean 4 7 ['chrisflav', 'github-actions', 'grunweg', 'hrmacbeth'] ocfnash
assignee:ocfnash
10-74453
10 days ago
22-25392
22 days ago
22-25924
22 days
30185 alreadydone
author:alreadydone
 feat(MathlibTest): kernel reduction of nsmul on elliptic curve over ZMod Co-authored-by: @SteffenReith --- - [x] depends on: #30144 - [x] depends on: #30181 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra t-number-theory t-algebraic-geometry awaiting-author
label:t-algebra$
 21/0 MathlibTest/EllipticCurve.lean 1 9 ['alreadydone', 'github-actions', 'joneugster', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] joneugster
assignee:joneugster
10-74379
10 days ago
45-41848
45 days ago
1-15522
1 day
34245 staroperator
author:staroperator
 feat(Data/Set): add `Set.Uncountable` There are `Set` specialized shortcuts `Set.Finite`, `Set.Infinite` and `Set.Countable`, but lacking `Set.Uncountable`. I find this useful in #34246. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-data awaiting-zulip 82/4 Mathlib/Analysis/Real/Cardinality.lean,Mathlib/Data/Set/Countable.lean,Mathlib/SetTheory/Cardinal/Basic.lean 3 17 ['github-actions', 'joneugster', 'staroperator', 'vihdzp'] joneugster
assignee:joneugster
10-72764
10 days ago
41-46011
41 days ago
12-21154
12 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. Co-authored-by: Davood H. H. Tehrani [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) blocked-by-other-PR new-contributor merge-conflict 290/366 Mathlib/Analysis/Normed/Module/PiTensorProduct/InjectiveSeminorm.lean,Mathlib/Analysis/Normed/Module/PiTensorProduct/ProjectiveSeminorm.lean,Mathlib/LinearAlgebra/PiTensorProduct.lean 3 4 ['github-actions', 'mathlib-dependent-issues', 'mathlib-merge-conflicts'] nobody
10-70063
10 days ago
24-57511
24 days ago
0-1492
24 minutes
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/) merge-conflict 151/108 Mathlib/Condensed/Light/TopCatAdjunction.lean,Mathlib/Condensed/TopCatAdjunction.lean,Mathlib/LinearAlgebra/Matrix/GeneralLinearGroup/Defs.lean,Mathlib/MeasureTheory/MeasurableSpace/Embedding.lean,Mathlib/Tactic/DefEqTransformations.lean,Mathlib/Tactic/FunProp/Core.lean,Mathlib/Tactic/FunProp/FunctionData.lean,Mathlib/Tactic/FunProp/Mor.lean,Mathlib/Tactic/FunProp/Theorems.lean,Mathlib/Tactic/FunProp/Types.lean,Mathlib/Topology/Algebra/AffineSubspace.lean,Mathlib/Topology/Algebra/ContinuousAffineEquiv.lean,Mathlib/Topology/Algebra/Field.lean,Mathlib/Topology/Algebra/Module/Equiv.lean,Mathlib/Topology/Algebra/Module/WeakBilin.lean,Mathlib/Topology/Category/TopCat/Limits/Basic.lean,Mathlib/Topology/Constructions/SumProd.lean,Mathlib/Topology/Homeomorph/Defs.lean,Mathlib/Topology/Instances/Matrix.lean,Mathlib/Topology/Path.lean,MathlibTest/DefEqTransformations.lean,MathlibTest/fun_prop_dev.lean 22 6 ['DavidLedvinka', 'JovanGerb', 'github-actions', 'j-loreaux', 'lecopivo', 'mathlib-merge-conflicts'] nobody
10-66222
10 days ago
unknown
0-0
0 seconds
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
10-64589
10 days ago
850-41963
850 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
10-64561
10 days ago
490-55667
490 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
10-64538
10 days ago
603-30562
603 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
10-64519
10 days ago
585-42689
585 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
10-64507
10 days ago
270-64246
270 days ago
91-69159
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
10-64490
10 days ago
482-18725
482 days ago
0-214
3 minutes
34123 staroperator
author:staroperator
 feat(Data/Set/Finite): finite distributivity for complete distributive lattices --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-order awaiting-author 52/0 Mathlib/Data/Set/Finite/Lattice.lean 1 12 ['Komyyy', 'github-actions', 'plp127', 'staroperator'] Komyyy
assignee:Komyyy
10-62385
10 days ago
56-40382
56 days ago
56-66330
56 days
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 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 14 ['YaelDillies', 'erdOne', 'eric-wieser', 'github-actions', 'mathlib-bors', 'mathlib-dependent-issues', 'mathlib-merge-conflicts', 'vihdzp'] nobody
10-61408
10 days ago
10-61461
10 days ago
0-84995
23 hours
35900 matthewjasper
author:matthewjasper
 chore: Fix non-defeq diamonds on OrderDual This only makes changes to fix the diamonds, rather than the general defeq abuse with `OrderDual`. --- - [x] depends on: #35995 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor t-order merge-conflict 213/116 Mathlib/Algebra/Field/Basic.lean,Mathlib/Algebra/MonoidAlgebra/Degree.lean,Mathlib/Algebra/Order/Group/Synonym.lean,Mathlib/Algebra/Order/GroupWithZero/Action/Synonym.lean,Mathlib/Algebra/Order/GroupWithZero/Synonym.lean,Mathlib/Algebra/Order/Module/Defs.lean,Mathlib/Algebra/Order/Module/Synonym.lean,Mathlib/Algebra/Order/Ring/Cast.lean,Mathlib/Algebra/Order/Ring/Synonym.lean,Mathlib/Analysis/Convex/Basic.lean,Mathlib/Analysis/Normed/Group/Constructions.lean,Mathlib/Data/Nat/Cast/Synonym.lean,Mathlib/Order/Lattice.lean 13 5 ['github-actions', 'mathlib-dependent-issues', 'mathlib-merge-conflicts'] nobody
10-57729
10 days ago
14-19747
14 days ago
16-6095
16 days
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
10-55577
10 days ago
121-51760
121 days ago
99-26893
99 days
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 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) blocked-by-other-PR large-import t-algebra
label:t-algebra$
 2518/34 Mathlib.lean,Mathlib/Algebra/Module/SpanRank.lean,Mathlib/Algebra/Module/Torsion/Basic.lean,Mathlib/LinearAlgebra/Span/Basic.lean,Mathlib/RingTheory/CohenMacaulay/Basic.lean,Mathlib/RingTheory/CohenMacaulay/Maximal.lean,Mathlib/RingTheory/Ideal/Cotangent.lean,Mathlib/RingTheory/Ideal/KrullsHeightTheorem.lean,Mathlib/RingTheory/Ideal/Operations.lean,Mathlib/RingTheory/Ideal/Quotient/Operations.lean,Mathlib/RingTheory/KrullDimension/Regular.lean,Mathlib/RingTheory/Regular/Category.lean,Mathlib/RingTheory/Regular/Depth.lean,Mathlib/RingTheory/Regular/Ischebeck.lean,Mathlib/RingTheory/Regular/RegularSequence.lean,Mathlib/RingTheory/RegularLocalRing/Basic.lean,Mathlib/RingTheory/RegularLocalRing/Defs.lean 17 11 ['github-actions', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
10-53826
10 days ago
187-15710
187 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 large-import t-algebra
label:t-algebra$
 2990/34 Mathlib.lean,Mathlib/Algebra/Module/SpanRank.lean,Mathlib/Algebra/Module/Torsion/Basic.lean,Mathlib/LinearAlgebra/Span/Basic.lean,Mathlib/RingTheory/CohenMacaulay/Basic.lean,Mathlib/RingTheory/CohenMacaulay/Maximal.lean,Mathlib/RingTheory/Ideal/Cotangent.lean,Mathlib/RingTheory/Ideal/KrullsHeightTheorem.lean,Mathlib/RingTheory/Ideal/Operations.lean,Mathlib/RingTheory/Ideal/Quotient/Operations.lean,Mathlib/RingTheory/KrullDimension/Regular.lean,Mathlib/RingTheory/Regular/AuslanderBuchsbaum.lean,Mathlib/RingTheory/Regular/Category.lean,Mathlib/RingTheory/Regular/Depth.lean,Mathlib/RingTheory/Regular/Ischebeck.lean,Mathlib/RingTheory/Regular/RegularSequence.lean,Mathlib/RingTheory/RegularLocalRing/Basic.lean,Mathlib/RingTheory/RegularLocalRing/Defs.lean,Mathlib/RingTheory/RegularLocalRing/GlobalDimension.lean 19 12 ['github-actions', 'mathlib-merge-conflicts', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
10-53707
10 days ago
186-57090
186 days ago
0-1929
32 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 large-import t-algebra
label:t-algebra$
 3306/34 Mathlib.lean,Mathlib/Algebra/Category/ModuleCat/Baer.lean,Mathlib/Algebra/Homology/ShortComplex/ModuleCat.lean,Mathlib/Algebra/Module/SpanRank.lean,Mathlib/Algebra/Module/Torsion/Basic.lean,Mathlib/LinearAlgebra/Span/Basic.lean,Mathlib/RingTheory/CohenMacaulay/Basic.lean,Mathlib/RingTheory/CohenMacaulay/Maximal.lean,Mathlib/RingTheory/GlobalDimension.lean,Mathlib/RingTheory/Ideal/Cotangent.lean,Mathlib/RingTheory/Ideal/KrullsHeightTheorem.lean,Mathlib/RingTheory/Ideal/Operations.lean,Mathlib/RingTheory/Ideal/Quotient/Operations.lean,Mathlib/RingTheory/KrullDimension/Regular.lean,Mathlib/RingTheory/Regular/AuslanderBuchsbaum.lean,Mathlib/RingTheory/Regular/Category.lean,Mathlib/RingTheory/Regular/Depth.lean,Mathlib/RingTheory/Regular/Ischebeck.lean,Mathlib/RingTheory/Regular/RegularSequence.lean,Mathlib/RingTheory/RegularLocalRing/Basic.lean,Mathlib/RingTheory/RegularLocalRing/Defs.lean,Mathlib/RingTheory/RegularLocalRing/GlobalDimension.lean 22 15 ['github-actions', 'mathlib-merge-conflicts', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
10-53637
10 days ago
187-13467
187 days ago
0-2082
34 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
10-53506
10 days ago
59-82033
59 days ago
10-68503
10 days
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 39791/341 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/CochainComplexPlus.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/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/HomologicalComplexLimitsEventuallyConstant.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/Lifting.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/Refinements.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 314 8 ['github-actions', 'mathlib-merge-conflicts', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
10-53425
10 days ago
276-45256
276 days ago
0-2
2 seconds
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 large-import t-algebra
label:t-algebra$
 3474/34 Mathlib.lean,Mathlib/Algebra/Category/ModuleCat/Baer.lean,Mathlib/Algebra/Homology/ShortComplex/ModuleCat.lean,Mathlib/Algebra/Module/SpanRank.lean,Mathlib/Algebra/Module/Torsion/Basic.lean,Mathlib/LinearAlgebra/Span/Basic.lean,Mathlib/RingTheory/CohenMacaulay/Basic.lean,Mathlib/RingTheory/CohenMacaulay/Maximal.lean,Mathlib/RingTheory/GlobalDimension.lean,Mathlib/RingTheory/Ideal/Cotangent.lean,Mathlib/RingTheory/Ideal/KrullsHeightTheorem.lean,Mathlib/RingTheory/Ideal/Operations.lean,Mathlib/RingTheory/Ideal/Quotient/Operations.lean,Mathlib/RingTheory/KrullDimension/Regular.lean,Mathlib/RingTheory/Regular/AuslanderBuchsbaum.lean,Mathlib/RingTheory/Regular/Category.lean,Mathlib/RingTheory/Regular/Depth.lean,Mathlib/RingTheory/Regular/Ischebeck.lean,Mathlib/RingTheory/Regular/RegularSequence.lean,Mathlib/RingTheory/RegularLocalRing/Basic.lean,Mathlib/RingTheory/RegularLocalRing/Defs.lean,Mathlib/RingTheory/RegularLocalRing/GlobalDimension.lean,Mathlib/RingTheory/RegularLocalRing/RegularRing/Basic.lean,Mathlib/RingTheory/RegularLocalRing/RegularRing/GlobalDimension.lean 24 17 ['github-actions', 'mathlib-merge-conflicts', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
10-53351
10 days ago
182-1580
182 days ago
0-632
10 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 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) blocked-by-other-PR large-import t-ring-theory 2795/34 Mathlib.lean,Mathlib/Algebra/Category/ModuleCat/Baer.lean,Mathlib/Algebra/Homology/ShortComplex/ModuleCat.lean,Mathlib/Algebra/Module/SpanRank.lean,Mathlib/Algebra/Module/Torsion/Basic.lean,Mathlib/LinearAlgebra/Span/Basic.lean,Mathlib/RingTheory/GlobalDimension.lean,Mathlib/RingTheory/Ideal/Cotangent.lean,Mathlib/RingTheory/Ideal/KrullsHeightTheorem.lean,Mathlib/RingTheory/Ideal/Operations.lean,Mathlib/RingTheory/Ideal/Quotient/Operations.lean,Mathlib/RingTheory/KrullDimension/Regular.lean,Mathlib/RingTheory/Regular/AuslanderBuchsbaum.lean,Mathlib/RingTheory/Regular/Category.lean,Mathlib/RingTheory/Regular/Depth.lean,Mathlib/RingTheory/Regular/Ischebeck.lean,Mathlib/RingTheory/Regular/RegularSequence.lean,Mathlib/RingTheory/RegularLocalRing/AuslanderBuchsbaumSerre.lean,Mathlib/RingTheory/RegularLocalRing/Basic.lean,Mathlib/RingTheory/RegularLocalRing/Defs.lean 20 13 ['github-actions', 'mathlib-merge-conflicts', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
10-53129
10 days ago
179-6792
179 days ago
0-80
1 minute
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 large-import t-ring-theory 4259/34 Mathlib.lean,Mathlib/Algebra/Category/ModuleCat/Baer.lean,Mathlib/Algebra/Homology/ShortComplex/ModuleCat.lean,Mathlib/Algebra/Module/SpanRank.lean,Mathlib/Algebra/Module/Torsion/Basic.lean,Mathlib/LinearAlgebra/Span/Basic.lean,Mathlib/RingTheory/CohenMacaulay/Basic.lean,Mathlib/RingTheory/CohenMacaulay/Maximal.lean,Mathlib/RingTheory/GlobalDimension.lean,Mathlib/RingTheory/Ideal/Cotangent.lean,Mathlib/RingTheory/Ideal/KrullsHeightTheorem.lean,Mathlib/RingTheory/Ideal/Operations.lean,Mathlib/RingTheory/Ideal/Quotient/Operations.lean,Mathlib/RingTheory/KrullDimension/Regular.lean,Mathlib/RingTheory/Regular/AuslanderBuchsbaum.lean,Mathlib/RingTheory/Regular/Category.lean,Mathlib/RingTheory/Regular/Depth.lean,Mathlib/RingTheory/Regular/Ischebeck.lean,Mathlib/RingTheory/Regular/RegularSequence.lean,Mathlib/RingTheory/RegularLocalRing/AuslanderBuchsbaumSerre.lean,Mathlib/RingTheory/RegularLocalRing/Basic.lean,Mathlib/RingTheory/RegularLocalRing/Defs.lean,Mathlib/RingTheory/RegularLocalRing/GlobalDimension.lean,Mathlib/RingTheory/RegularLocalRing/Localization.lean,Mathlib/RingTheory/RegularLocalRing/RegularRing/Basic.lean,Mathlib/RingTheory/RegularLocalRing/RegularRing/GlobalDimension.lean,Mathlib/RingTheory/RegularLocalRing/RegularRing/Localization.lean 27 18 ['github-actions', 'mathlib-merge-conflicts', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
10-53032
10 days ago
178-78623
178 days ago
0-458
7 minutes
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. --- - [ ] depends on: #28684 [![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 433/10 Mathlib.lean,Mathlib/Algebra/Module/SpanRank.lean,Mathlib/Algebra/Module/Torsion/Basic.lean,Mathlib/LinearAlgebra/Span/Basic.lean,Mathlib/RingTheory/Ideal/Cotangent.lean,Mathlib/RingTheory/Ideal/KrullsHeightTheorem.lean,Mathlib/RingTheory/KrullDimension/Regular.lean,Mathlib/RingTheory/RegularLocalRing/Defs.lean,Mathlib/RingTheory/RegularLocalRing/RegularRing/Basic.lean,Mathlib/RingTheory/RegularLocalRing/RegularRing/Polynomial.lean 10 4 ['github-actions', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
10-53005
10 days ago
182-524
182 days ago
0-251
4 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 large-import t-ring-theory 3697/34 Mathlib.lean,Mathlib/Algebra/Category/ModuleCat/Baer.lean,Mathlib/Algebra/Homology/ShortComplex/ModuleCat.lean,Mathlib/Algebra/Module/SpanRank.lean,Mathlib/Algebra/Module/Torsion/Basic.lean,Mathlib/LinearAlgebra/Span/Basic.lean,Mathlib/RingTheory/CohenMacaulay/Basic.lean,Mathlib/RingTheory/CohenMacaulay/Maximal.lean,Mathlib/RingTheory/GlobalDimension.lean,Mathlib/RingTheory/Ideal/Cotangent.lean,Mathlib/RingTheory/Ideal/KrullsHeightTheorem.lean,Mathlib/RingTheory/Ideal/Operations.lean,Mathlib/RingTheory/Ideal/Quotient/Operations.lean,Mathlib/RingTheory/KrullDimension/Regular.lean,Mathlib/RingTheory/Regular/AuslanderBuchsbaum.lean,Mathlib/RingTheory/Regular/Category.lean,Mathlib/RingTheory/Regular/Depth.lean,Mathlib/RingTheory/Regular/Ischebeck.lean,Mathlib/RingTheory/Regular/RegularSequence.lean,Mathlib/RingTheory/RegularLocalRing/Basic.lean,Mathlib/RingTheory/RegularLocalRing/Defs.lean,Mathlib/RingTheory/RegularLocalRing/GlobalDimension.lean,Mathlib/RingTheory/RegularLocalRing/RegularRing/Basic.lean,Mathlib/RingTheory/RegularLocalRing/RegularRing/GlobalDimension.lean,Mathlib/RingTheory/RegularLocalRing/RegularRing/Polynomial.lean,Mathlib/RingTheory/RegularLocalRing/RegularRing/Syzygy.lean 26 18 ['github-actions', 'mathlib-merge-conflicts', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
10-52925
10 days ago
181-76998
181 days ago
0-2475
41 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/) blocked-by-other-PR large-import 264/10 Mathlib.lean,Mathlib/Algebra/Module/SpanRank.lean,Mathlib/Algebra/Module/Torsion/Basic.lean,Mathlib/LinearAlgebra/Span/Basic.lean,Mathlib/RingTheory/Ideal/Cotangent.lean,Mathlib/RingTheory/Ideal/KrullsHeightTheorem.lean,Mathlib/RingTheory/KrullDimension/Regular.lean,Mathlib/RingTheory/RegularLocalRing/Defs.lean,Mathlib/RingTheory/RegularLocalRing/PowerSeries.lean 9 3 ['github-actions', 'mathlib-bors', 'mathlib-dependent-issues'] nobody
10-52548
10 days ago
24-82938
24 days ago
0-5
5 seconds
36102 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. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-ring-theory 475/0 Mathlib.lean,Mathlib/RingTheory/Flat/Extension.lean 2 2 ['github-actions', 'mathlib-bors'] nobody
10-52381
10 days ago
13-3222
13 days ago
0-6
6 seconds
35560 Thmoas-Guan
author:Thmoas-Guan
 feat(RingTheory): Cohen Structure Theorem Formalization of Cohen structure theorem following https://stacks.math.columbia.edu/tag/0323 Co-authored-by: @BryceT233 --- - [ ] depends on: #28683 - [ ] depends on: #35561 - [ ] depends on: #35852 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) blocked-by-other-PR large-import 2347/81 Mathlib.lean,Mathlib/Algebra/Module/SpanRank.lean,Mathlib/Algebra/Module/Torsion/Basic.lean,Mathlib/LinearAlgebra/Span/Basic.lean,Mathlib/RingTheory/AdicCompletion/LocalRing.lean,Mathlib/RingTheory/AdicCompletion/Noetherian.lean,Mathlib/RingTheory/CohenStructureTheorem.lean,Mathlib/RingTheory/Flat/Extension.lean,Mathlib/RingTheory/Ideal/Cotangent.lean,Mathlib/RingTheory/Ideal/KrullsHeightTheorem.lean,Mathlib/RingTheory/KrullDimension/Regular.lean,Mathlib/RingTheory/RegularLocalRing/Basic.lean,Mathlib/RingTheory/RegularLocalRing/Defs.lean,Mathlib/RingTheory/RegularLocalRing/PowerSeries.lean,Mathlib/RingTheory/RingHom/Smooth.lean,Mathlib/RingTheory/Smooth/Quotient.lean,Mathlib/RingTheory/TensorProduct/Quotient.lean 17 5 ['BryceT233', 'github-actions', 'mathlib-bors', 'mathlib-dependent-issues', 'mathlib-merge-conflicts'] nobody
10-51917
10 days ago
24-83161
24 days ago
0-8
8 seconds
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 6219/105 Mathlib.lean,Mathlib/Algebra/Module/SpanRank.lean,Mathlib/Algebra/Module/Torsion/Basic.lean,Mathlib/CategoryTheory/Abelian/Ext.lean,Mathlib/LinearAlgebra/ExteriorPower/Basic.lean,Mathlib/LinearAlgebra/ExteriorPower/Basis.lean,Mathlib/LinearAlgebra/Span/Basic.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/Flat/Extension.lean,Mathlib/RingTheory/Ideal/Cotangent.lean,Mathlib/RingTheory/Ideal/KrullsHeightTheorem.lean,Mathlib/RingTheory/Ideal/Operations.lean,Mathlib/RingTheory/Ideal/Quotient/Operations.lean,Mathlib/RingTheory/KoszulComplex/Cocomplex.lean,Mathlib/RingTheory/KoszulComplex/Complex.lean,Mathlib/RingTheory/KoszulComplex/Dual.lean,Mathlib/RingTheory/KoszulComplex/Homotopy.lean,Mathlib/RingTheory/KrullDimension/Regular.lean,Mathlib/RingTheory/Regular/Category.lean,Mathlib/RingTheory/Regular/Depth.lean,Mathlib/RingTheory/Regular/Ischebeck.lean,Mathlib/RingTheory/Regular/RegularSequence.lean,Mathlib/RingTheory/RegularLocalRing/Basic.lean,Mathlib/RingTheory/RegularLocalRing/Defs.lean,Mathlib/RingTheory/RegularLocalRing/PowerSeries.lean,Mathlib/RingTheory/RingHom/Smooth.lean,Mathlib/RingTheory/Smooth/Quotient.lean,Mathlib/RingTheory/TensorProduct/Quotient.lean 34 4 ['github-actions', 'mathlib-dependent-issues', 'mathlib-merge-conflicts'] nobody
10-51872
10 days ago
38-59309
38 days ago
0-12
12 seconds
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
10-49213
10 days ago
31-72205
31 days ago
1-52648
1 day
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
10-46879
10 days ago
161-25487
161 days ago
110-51265
110 days
33972 YuvalFilmus
author:YuvalFilmus
 feat(Analysis/Polynomial/Order): polynomial has fixed sign beyond largest root We prove that a polynomial has fixed sign beyond its largest root. One could also prove similar results about the smallest root, but they will be more awkward since they will depend on the parity of the (natural) degree; suggestions welcome (perhaps for a future PR). --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-analysis awaiting-zulip 134/0 Mathlib.lean,Mathlib/Analysis/Polynomial/Order.lean 2 14 ['YuvalFilmus', 'artie2000', 'github-actions', 'mathlib-merge-conflicts', 'urkud', 'vihdzp'] ADedecker and urkud
assignee:urkud assignee:ADedecker
10-45823
10 days ago
21-49930
21 days ago
39-23486
39 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
10-45548
10 days 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
10-44810
10 days ago
unknown
0-0
0 seconds
35436 daniel-carranza
author:daniel-carranza
 feat(CategoryTheory/Monoidal/Closed): Prove the isomorphism of internal hom objects C(x \otimes y, z) and C(y, C(x, z)) Prove the currying-uncurrying isomorphism `C(x \otimes y, z) \iso C(y, C(x, z))` between internal hom objects of a closed monoidal category `C`. --- This result is connected to the infinity-cosmos project, and is used to prove that a closed monoidal category enriched in itself admits all cotensors. ~Line 81 currently contains a one-line proof in tactics mode `exact rfl`. When trying to use `rfl` outside of tactics mode, an error is thrown~ (Fixed, thank you @robin-carlier!). Any help with this (or any other aspect of the formalization) is greatly appreciated! [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor t-category-theory infinity-cosmos delegated 89/0 Mathlib.lean,Mathlib/CategoryTheory/Monoidal/Closed/InternalCurrying.lean 2 15 ['dagurtomas', 'daniel-carranza', 'github-actions', 'joelriou', 'mathlib-bors', 'riccardobrasca', 'robin-carlier'] adamtopaz
assignee:adamtopaz
10-40652
10 days ago
18-28791
18 days ago
7-67484
7 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 200/0 Mathlib/Probability/Distributions/Exponential.lean 1 6 ['JoaBjo', 'Timeroot', 'github-actions'] kex-y
assignee:kex-y
10-40616
10 days ago
10-40590
10 days ago
15-85459
15 days
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
10-40606
10 days ago
217-20752
217 days ago
25-83942
25 days
35820 smmercuri
author:smmercuri
 feat: unit lemmas and embedding for `FiniteAdeleRing` --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-ring-theory 42/2 Mathlib/RingTheory/DedekindDomain/FiniteAdeleRing.lean 1 1 ['github-actions'] alreadydone
assignee:alreadydone
10-37359
10 days ago
18-48364
18 days ago
18-48549
18 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
10-36565
10 days ago
173-73561
173 days ago
0-2230
37 minutes
35697 gasparattila
author:gasparattila
 chore: call `dsimp` in the default tactics of `Homeomorph` fields --- - [x] depends on: #35607 - [ ] depends on: #35683 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) blocked-by-other-PR 63/111 Mathlib/Analysis/Normed/Lp/PiLp.lean,Mathlib/Analysis/Normed/Lp/ProdLp.lean,Mathlib/Tactic/FunProp/Core.lean,Mathlib/Tactic/FunProp/FunctionData.lean,Mathlib/Tactic/FunProp/Theorems.lean,Mathlib/Topology/Algebra/ConstMulAction.lean,Mathlib/Topology/Algebra/Constructions.lean,Mathlib/Topology/Algebra/Constructions/DomMulAct.lean,Mathlib/Topology/Algebra/Group/Basic.lean,Mathlib/Topology/Constructions.lean,Mathlib/Topology/Constructions/SumProd.lean,Mathlib/Topology/Homeomorph/Defs.lean,Mathlib/Topology/Homeomorph/Lemmas.lean,MathlibTest/fun_prop_dev.lean 14 3 ['github-actions', 'mathlib-dependent-issues', 'mathlib-merge-conflicts'] nobody
10-30758
10 days ago
unknown
0-0
0 seconds
32305 faenuccio
author:faenuccio
 feat: define Sobolev Spaces Nothing to see yet. --- - [ ] depends on: #32250 - [ ] depends on: #31809 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict WIP t-analysis large-import blocked-by-other-PR 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 7 ['ADedecker', 'github-actions', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
10-30365
10 days ago
105-61769
105 days ago
0-2
2 seconds
35540 tb65536
author:tb65536
 feat(GroupTheory/ResiduallyFinite): define residually finite groups This PR defines residually finite groups, provides some basic API, and gives the connection with profinite completion. Some to_additivizing is still waiting on #34784. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra t-group-theory
label:t-algebra$
 97/1 Mathlib.lean,Mathlib/GroupTheory/FiniteIndexNormalSubgroup.lean,Mathlib/GroupTheory/ResiduallyFinite.lean,Mathlib/Topology/Algebra/Category/ProfiniteGrp/Completion.lean 4 4 ['ADedecker', 'github-actions'] mattrobball
assignee:mattrobball
10-29933
10 days ago
10-29994
10 days ago
25-11468
25 days
35941 MichaelStollBayreuth
author:MichaelStollBayreuth
 feat(NumberTheory/Height/MvPolynomial): add height bounds for `![x*y, x+y, 1]` This continuous the motive of height bounds on polynomial maps; this time for the specific case of `![x*y, x+y, 1]` or, in homogeneous form, `![a*c, a*d + b*c, b*d]`. This specific case is used to deduce the "approximate parallelogram law" for the naïve height on an elliptic curve, which in turn is an ingredient for the proof of the Mordell-Weil Theorem. --- - [ ] depends on: #35940 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-number-theory t-algebra blocked-by-other-PR
label:t-algebra$
 257/0 Mathlib/NumberTheory/Height/MvPolynomial.lean 1 5 ['MichaelStollBayreuth', 'github-actions', 'jcommelin', 'mathlib-dependent-issues', 'mathlib-merge-conflicts'] nobody
10-26351
10 days ago
15-30977
15 days ago
0-2163
36 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
10-22586
10 days ago
21-37235
21 days ago
47-76964
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
10-22341
10 days ago
60-47854
60 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
10-11061
10 days ago
24-79501
24 days ago
5-13145
5 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
10-11059
10 days ago
28-47433
28 days ago
0-568
9 minutes
31219 Thmoas-Guan
author:Thmoas-Guan
 feat(Algebra): lemma about `IsBaseChange` under exact sequence In this lemma, we proved cokernel preserve `IsBaseChange S` and kernel preserve `IsBaseChange S` when `S` is flat. Co-authored-by: Wang Jingting --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-ring-theory awaiting-author 105/0 Mathlib.lean,Mathlib/RingTheory/Flat/IsBaseChange.lean 2 9 ['Thmoas-Guan', 'erdOne', 'github-actions', 'mathlib4-merge-conflict-bot', 'urkud'] nobody
10-2684
10 days ago
114-24481
114 days ago
16-43288
16 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 - [ ] depends on: #31219 - [x] depends on: #31696 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) blocked-by-other-PR large-import t-algebra
label:t-algebra$
 154/0 Mathlib.lean,Mathlib/Algebra/Module/FinitePresentation.lean,Mathlib/RingTheory/Flat/IsBaseChange.lean 3 5 ['github-actions', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
10-1785
10 days ago
133-59590
133 days ago
0-266
4 minutes
36308 SnirBroshi
author:SnirBroshi
 feat(Combinatorics/SimpleGraph/Subgraph): a couple of `subgraphOfAdj` lemmas --- Also golfed a lemma (it's one line longer but it looks simpler to me). [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-combinatorics 14/5 Mathlib/Combinatorics/SimpleGraph/Subgraph.lean 1 1 ['github-actions'] nobody
9-84312
9 days ago
9-84384
9 days ago
9-84339
9 days
35760 astrainfinita
author:astrainfinita
 chore: deprecate `ConditionallyCompleteLinearOrderedField` Use the new mixin typeclass instead. Also, move the API for conditionally complete linear ordered fields into the `ConditionallyCompleteLinearOrderedField` namespace, and make instances scoped to this namespace. We should usually use `ℝ` instead. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra t-order maintainer-merge
label:t-algebra$
 124/52 Mathlib.lean,Mathlib/Algebra/Order/CompleteField.lean,Mathlib/Algebra/Order/Ring/StandardPart.lean,Mathlib/Data/Real/CompleteField.lean,Mathlib/Data/Real/Hom.lean 5 6 ['Vierkantor', 'astrainfinita', 'github-actions', 'leanprover-radar'] Vierkantor
assignee:Vierkantor
9-77121
9 days ago
11-56842
11 days ago
19-49913
19 days
36192 tb65536
author:tb65536
 feat(NumberTheory/ArithmeticFunction/LFunction): formal Euler products of Dirichlet series This PR defines formal Euler products of Dirichlet series. See #36189 for how this will ultimately be used to construct L-functions. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-number-theory t-algebra
label:t-algebra$
 129/0 Mathlib.lean,Mathlib/NumberTheory/ArithmeticFunction/Defs.lean,Mathlib/NumberTheory/ArithmeticFunction/LFunction.lean 3 32 ['ADedecker', 'AntoineChambert-Loir', 'MichaelStollBayreuth', 'b-mehta', 'github-actions', 'loefflerd', 'riccardobrasca', 'tb65536'] riccardobrasca
assignee:riccardobrasca
9-73464
9 days ago
10-50789
10 days ago
11-63997
11 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 awaiting-author 416/0 Mathlib.lean,Mathlib/NumberTheory/Transcendental/GelfondSchneider/MainAlg.lean 2 5 ['github-actions', 'tb65536'] tb65536
assignee:tb65536
9-71080
9 days ago
20-35767
20 days ago
20-36070
20 days
31194 grunweg
author:grunweg
 feat: add `#check'` command and tactic, which only show explicit arguments In some areas (such as differential geometry), many lemmas have a *lot* of implicit and typeclass arguments. Using `#check foo` to determine which explicit arguments are expected for a given lemma gives output which is painful to read, because the explicit argument is buried among many lines of other output. The `#check'` command and tactic produce very similar output, but with implicit and typeclass arguments omitted. This increases usability a lot. In the future, this could (and should) be unified to the #check command in core, by becoming e.g. `#check +only-explicit`. Until then, let us add this to mathlib to facilitate experimentation of the most useful behaviour. From the project towards geodesics and the Levi-Civita connection. Co-authored-by: Kyle Miller Co-authored-by: Patrick Massot --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-meta 155/17 Mathlib/Tactic/Check.lean,MathlibTest/Check.lean 2 20 ['github-actions', 'grunweg', 'mathlib4-merge-conflict-bot', 'thorimur'] thorimur
assignee:thorimur
9-69253
9 days ago
9-69077
9 days ago
21-26550
21 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
9-61295
9 days ago
25-78861
25 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/Topology/VectorBundle/Notation.lean 2 3 ['github-actions', 'mathlib-dependent-issues', 'mathlib-merge-conflicts'] nobody
9-61217
9 days ago
32-68342
32 days ago
0-1
1 second
35970 adrianmartir
author:adrianmartir
 feat(CategoryTheory/Profunctor): Add profunctors and a basic API for them This adds a definition of a profunctor and the definition of a natural transformation between two profunctors. Profunctors are defined as a structure, as suggested by @adamtopaz [on Zulip](https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/Operads.20Formalization/with/566160316). Using this as a base, I wrote a basic API for profunctors. This will be needed for a future formalization of operads. A lot of the API was first drafted by @Aristotle-Harmonic. Co-authored-by: Aristotle (Harmonic) --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-category-theory new-contributor awaiting-author 185/0 Mathlib.lean,Mathlib/CategoryTheory/Profunctor.lean 2 16 ['adrianmartir', 'dagurtomas', 'emilyriehl', 'github-actions', 'joelriou'] nobody
9-54837
9 days ago
14-35152
14 days ago
14-36608
14 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 large-import 361/60 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/Matrix/SpecialLinearGroup.lean,Mathlib/LinearAlgebra/Projectivization/Action.lean,Mathlib/NumberTheory/Modular.lean,Mathlib/Topology/Compactification/OnePoint/ProjectiveLine.lean 9 6 ['github-actions', 'mathlib-merge-conflicts'] nobody
9-54509
9 days ago
74-48171
74 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
9-48848
9 days ago
53-45523
53 days ago
0-1122
18 minutes
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 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 3 ['github-actions', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
9-43724
9 days ago
87-32315
87 days ago
0-1
1 second
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 3 ['github-actions'] nobody
9-41714
9 days ago
9-45125
9 days ago
9-45080
9 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
9-36827
9 days ago
unknown
0-0
0 seconds
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. --- - [ ] depends on: #30436 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra
label:t-algebra$
 427/1 Mathlib.lean,Mathlib/RingTheory/PowerSeries/Pentagonal.lean,Mathlib/Topology/Algebra/InfiniteSum/Pentagonal.lean,docs/1000.yaml 4 43 ['copilot-pull-request-reviewer', 'github-actions', 'jcommelin', 'mathlib4-dependent-issues-bot', 'tb65536', 'urkud', 'vihdzp', 'wwylele'] kex-y
assignee:kex-y
9-33768
9 days ago
21-75964
21 days ago
79-76309
79 days
35829 IvanRenison
author:IvanRenison
 refactor(Data/Last): move `Mathlib.Tactic.BicategoryLike.pairs` to `List.consecutivePairs` Moves: - Mathlib.Tactic.BicategoryLike.pairs -> List.consecutivePairs --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-data 12/6 Mathlib/Data/List/Defs.lean,Mathlib/Tactic/Widget/StringDiagram.lean 2 5 ['IvanRenison', 'SnirBroshi', 'github-actions', 'robin-carlier'] Vierkantor
assignee:Vierkantor
9-18781
9 days ago
17-29068
17 days ago
18-9975
18 days
34119 themathqueen
author:themathqueen
 feat(LinearAlgebra/Matrix/WithConv): `Matrix.toLin'` as a star-algebra equivalence between their convolutive rings `WithConv (Matrix m n α)` is ⋆-algebraically equivalent to `WithConv ((n → α) →ₗ m → α)`. In particular, the convolutive product on linear maps corresponds to the Hadamard product on matrices and the intrinsic star on linear maps corresponds to taking the star of each element in the matrix. --- - [x] depends on: #30880 - [x] depends on: #34111 - [x] depends on: #34312 - [x] depends on: #34600 - [x] depends on: #34601 - [x] depends on: #34945 - [x] depends on: #34997 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra large-import
label:t-algebra$
 92/2 Mathlib/Algebra/Group/Idempotent.lean,Mathlib/Algebra/WithConv.lean,Mathlib/LinearAlgebra/Matrix/WithConv.lean,docs/references.bib 4 63 ['eric-wieser', 'github-actions', 'mathlib-dependent-issues', 'mathlib4-merge-conflict-bot', 'themathqueen'] ocfnash
assignee:ocfnash
8-69703
8 days ago
12-13329
12 days ago
19-83880
19 days
36075 edegeltje
author:edegeltje
 chore(CategoryTheory): Deprecate `CategoryTheory/Topos/Classifier.lean` module --- - [ ] depends on: #36060 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-category-theory blocked-by-other-PR 687/483 Mathlib.lean,Mathlib/CategoryTheory/Subobject/Classifier/Defs.lean,Mathlib/CategoryTheory/Topos/Classifier.lean 3 3 ['github-actions', 'mathlib-dependent-issues', 'mathlib-merge-conflicts'] nobody
8-65820
8 days ago
13-44006
13 days ago
0-1606
26 minutes
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/) blocked-by-other-PR merge-conflict 730/330 Mathlib.lean,Mathlib/Analysis/ODE/Basic.lean,Mathlib/Analysis/ODE/ExistUnique.lean,Mathlib/Analysis/ODE/Gronwall.lean,Mathlib/Analysis/ODE/PicardLindelof.lean,Mathlib/Analysis/ODE/Transform.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 11 4 ['github-actions', 'mathlib-dependent-issues', 'mathlib-merge-conflicts'] nobody
8-51473
8 days ago
35-41493
35 days ago
0-415
6 minutes
35908 vihdzp
author:vihdzp
 chore(FieldTheory/AbelRuffini): simpler definition of `solvableByRad` We redefine `solvableByRad F E` as the smallest intermediate field closed under n-th roots. This makes the predicate `IsSolvableByRad` redundant, and so we deprecate it. We also private/remove various auxiliary results, and change the statement of the Abel-Ruffini theorem to be about an element of the field, rather than the subtype. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra
label:t-algebra$
 134/164 Archive/Wiedijk100Theorems/AbelRuffini.lean,Mathlib/Algebra/Field/Subfield/Basic.lean,Mathlib/FieldTheory/AbelRuffini.lean,Mathlib/FieldTheory/IntermediateField/Adjoin/Defs.lean 4 5 ['github-actions', 'plp127', 'vihdzp'] riccardobrasca
assignee:riccardobrasca
8-46585
8 days ago
16-2416
16 days ago
16-3540
16 days
36224 gasparattila
author:gasparattila
 feat(Analysis/Normed/Affine): (pseudo)metric on `V →ᴬ[𝕜] Q` --- - [ ] depends on: #36083 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) blocked-by-other-PR 186/44 Mathlib/Analysis/Normed/Affine/ContinuousAffineMap.lean,Mathlib/Analysis/Normed/Group/AddTorsor.lean,Mathlib/Topology/Algebra/ContinuousAffineMap.lean 3 2 ['github-actions', 'mathlib-dependent-issues'] nobody
8-38390
8 days ago
11-30936
11 days ago
11-30891
11 days
35654 euprunin
author:euprunin
 chore: golf using `grind` The goal of this golfing PR is to decrease the number of times lemmas are called explicitly (replacing calls to lemmas with calls to tactics). 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): * `CochainComplex.HomComplex.mem_coboundaries_iff`: unchanged 🎉 * `integral_cos_mul_complex`: unchanged 🎉 * `List.next_getLast_cons`: unchanged 🎉 * `foldl_argAux_mem`: unchanged 🎉 * `Equiv.Perm.support_swap`: unchanged 🎉 * `Fermat42.mul`: unchanged 🎉 * `Filter.high_scores`: 155 ms before, 108 ms after 🎉 * `IocProdIoc_preimage`: unchanged 🎉 Profiled using `set_option trace.profiler true in`. This golfing PR is batched under the following guidelines: * Up to ~5 changed files per PR * Up to ~25 changed declarations per PR * Up to ~100 changed lines per PR --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) 8/41 Mathlib/Algebra/Homology/HomotopyCategory/HomComplexCohomology.lean,Mathlib/Analysis/SpecialFunctions/Integrals/Basic.lean,Mathlib/Data/List/MinMax.lean,Mathlib/GroupTheory/Perm/Support.lean,Mathlib/NumberTheory/FLT/Four.lean,Mathlib/Probability/Kernel/IonescuTulcea/Maps.lean 6 4 ['euprunin', 'github-actions', 'mathlib-merge-conflicts', 'vihdzp'] kex-y
assignee:kex-y
8-38118
8 days ago
8-38143
8 days ago
21-36916
21 days
35638 vihdzp
author:vihdzp
 chore(Topology/Order/OrderClosed): use `to_dual` --- - [x] depends on: #35637 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) 124/280 Mathlib/Order/ConditionallyCompletePartialOrder/Defs.lean,Mathlib/Order/Cover.lean,Mathlib/Order/Filter/Defs.lean,Mathlib/Topology/Order/OrderClosed.lean 4 2 ['github-actions', 'mathlib-dependent-issues'] kex-y
assignee:kex-y
8-18781
8 days ago
11-58835
11 days ago
11-59618
11 days
35892 vlad902
author:vlad902
 feat(Data): lemmas for `List.bagInter` Basic API lemmas for `List.bagInter` and correct a few misnamed lemmas. Co-authored-by: Aristotle (Harmonic) --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-data 60/5 Mathlib/Data/List/Lattice.lean,Mathlib/Data/List/Perm/Lattice.lean,Mathlib/Data/Multiset/UnionInter.lean 3 1 ['github-actions'] Vierkantor
assignee:Vierkantor
8-18777
8 days ago
16-26640
16 days ago
16-29239
16 days
36168 SnirBroshi
author:SnirBroshi
 feat(Order/ConditionallyCompleteLattice/Indexed): `f i j ≤ ⨆ (i) (j), f i j` Add `le_ciSup₂`/`ciInf₂_le` to match `CompleteLattice`'s `le_iSup₂`/`iInf₂_le`. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-order 28/0 Mathlib/Order/ConditionallyCompleteLattice/Indexed.lean 1 1 ['github-actions'] bryangingechen
assignee:bryangingechen
8-18771
8 days ago
12-4337
12 days ago
12-4292
12 days
36307 SnirBroshi
author:SnirBroshi
 feat(Combinatorics/SimpleGraph/Walks): `Walk.ofSupport` / `Walk.ofDarts` --- This would hopefully make constructions such as [the cycle in `cycleGraph`](https://github.com/leanprover-community/mathlib4/blob/1b2df6c93fdd0ece89a32521464d5193e0f381ed/Mathlib/Combinatorics/SimpleGraph/Circulant.lean#L140-L155) or [the path in `pathGraph`](https://github.com/leanprover-community/mathlib4/pull/34171) or [the Hamiltonian walk in the complete graph](https://leanprover.zulipchat.com/#narrow/channel/144837-PR-reviews/topic/Ore's.20Theorem/near/571353615) easier. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-combinatorics 88/0 Mathlib/Combinatorics/SimpleGraph/Walks/Basic.lean,Mathlib/Combinatorics/SimpleGraph/Walks/Operations.lean 2 1 ['github-actions'] nobody
8-14712
8 days ago
9-85589
9 days ago
9-85544
9 days
31644 Thmoas-Guan
author:Thmoas-Guan
 feat(Algebra): projective dimension of quotient regular sequence In this PR, we proved that for finitely generated module over Noetherian local ring, quotient by regular sequence increase the projective dimension by exactly its length. --- - [ ] depends on: #28582 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) awaiting-author t-ring-theory 235/0 Mathlib.lean,Mathlib/CategoryTheory/Abelian/Projective/Dimension.lean,Mathlib/RingTheory/Regular/ProjectiveDimension.lean 3 29 ['Thmoas-Guan', 'erdOne', 'github-actions', 'mathlib-dependent-issues', 'mathlib-merge-conflicts', 'mathlib4-merge-conflict-bot'] nobody
8-790
8 days ago
121-47457
121 days ago
0-23486
6 hours
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 --- - [ ] depends on: #36390 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) large-import t-ring-theory blocked-by-other-PR 240/24 Mathlib/RingTheory/Ideal/Operations.lean,Mathlib/RingTheory/Ideal/Quotient/Operations.lean,Mathlib/RingTheory/Regular/Category.lean,Mathlib/RingTheory/Regular/Depth.lean,Mathlib/RingTheory/Regular/RegularSequence.lean 5 55 ['Thmoas-Guan', 'alreadydone', 'chrisflav', 'dagurtomas', 'erdOne', 'github-actions', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] chrisflav
assignee:chrisflav
7-81125
7 days ago
24-82558
24 days ago
96-69322
96 days
35928 xgenereux
author:xgenereux
 feat(Subalgebra/Lattice): add notation for Algebra.adjoin This PR proposes a scoped notation for Algebra.adjoin, `R[a]`, inspired from `IntermediateField.adjoin`. See [here](https://live.lean-lang.org/#codez=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) for a preview of how it would look like. Note that I am currently using bracked, `[`, `]`. I know this clashes with the notation for `Polynomial`, `DualNumber`, `AdjoinRoot` and `GetElem` but it is my impression that it would rarely cause issues. See [#mathlib4 > Notation for Algebra.adjoin](https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/Notation.20for.20Algebra.2Eadjoin/with/576551144). --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra
label:t-algebra$
 236/186 Mathlib/Algebra/Algebra/Subalgebra/Lattice.lean,Mathlib/Algebra/DualNumber.lean,Mathlib/Analysis/Normed/Unbundled/IsPowMulFaithful.lean,Mathlib/FieldTheory/IntermediateField/Adjoin/Algebra.lean,Mathlib/FieldTheory/IntermediateField/Adjoin/Defs.lean,Mathlib/FieldTheory/Minpoly/IsIntegrallyClosed.lean,Mathlib/FieldTheory/Minpoly/MinpolyDiv.lean,Mathlib/LinearAlgebra/Complex/Module.lean,Mathlib/LinearAlgebra/Semisimple.lean,Mathlib/NumberTheory/JacobiSum/Basic.lean,Mathlib/NumberTheory/NumberField/Cyclotomic/Basic.lean,Mathlib/RingTheory/Adjoin/Polynomial/Basic.lean,Mathlib/RingTheory/Adjoin/PowerBasis.lean,Mathlib/RingTheory/Adjoin/Singleton.lean,Mathlib/RingTheory/Algebraic/Basic.lean,Mathlib/RingTheory/Conductor.lean,Mathlib/RingTheory/IntegralClosure/IsIntegralClosure/Basic.lean,Mathlib/RingTheory/Polynomial/Eisenstein/IsIntegral.lean,Mathlib/RingTheory/Polynomial/Ideal.lean,Mathlib/RingTheory/RootsOfUnity/Lemmas.lean,Mathlib/RingTheory/Unramified/LocalStructure.lean,Mathlib/RingTheory/Valuation/LocalSubring.lean,Mathlib/Topology/Algebra/Algebra.lean 23 5 ['github-actions', 'mathlib-merge-conflicts', 'xgenereux'] riccardobrasca
assignee:riccardobrasca
7-77884
7 days ago
8-47784
8 days ago
14-56629
14 days
36385 CoolRmal
author:CoolRmal
 feat: a sequential and countably compact space is sequentially compact The main result proved in this PR is that a sequential and countably compact space is sequentially compact. We also prove some lemmas: 1. If `f` is an embedding, then `A` is sequentially compact iff `f '' A` is sequentially compact. This result is then used to show the equivalence of `IsSeqCompact A` and `SeqCompactSpace A`. 2. If `f` is inducing, then `A` is countably compact iff `f '' A` is countably compact. This result is then used to show the equivalence of `IsCountablyCompact A` and `CountablyCompactSpace A`. 3. If `f` converges and `g` is another function such that `g x ∈ closure {f x}` for all `x`, then `g` also converges. --- - [ ] depends on: #36174 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-topology blocked-by-other-PR 424/0 Mathlib.lean,Mathlib/Topology/ClusterPt.lean,Mathlib/Topology/Compactness/CountablyCompact.lean,Mathlib/Topology/Inseparable.lean,docs/references.bib 5 2 ['github-actions', 'mathlib-dependent-issues'] nobody
7-76960
7 days ago
8-15643
8 days ago
0-220
3 minutes
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/) file-removed blocked-by-other-PR t-algebraic-geometry 762/2 Mathlib/AlgebraicGeometry/OrderOfVanishing.lean,Mathlib/AlgebraicGeometry/Properties.lean,Mathlib/Order/KrullDimension.lean,Mathlib/RingTheory/DiscreteValuationRing/Basic.lean,Mathlib/RingTheory/OrderOfVanishing/Basic.lean,Mathlib/RingTheory/OrderOfVanishing/Properties.lean,Mathlib/Topology/KrullDimension.lean 7 4 ['github-actions', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
7-73896
7 days ago
179-64670
179 days ago
0-672
11 minutes
35846 BryceT233
author:BryceT233
 feat(RingTheory/MvPowerSeries): add completeness for `MvPowerSeries` This PR continues the work in #35670 and #35707 by adding typeclass instances for the completeness of `MvPowerSeries` when the index type is finite. --- - [x] depends on: #35789 - [ ] depends on: #35707 - [ ] depends on: #35670 - [ ] depends on: #35597 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-ring-theory new-contributor blocked-by-other-PR 201/0 Mathlib.lean,Mathlib/RingTheory/AdicCompletion/Completeness.lean 2 3 ['github-actions', 'mathlib-dependent-issues'] nobody
7-64383
7 days ago
18-79
18 days ago
0-104
1 minute
36216 michaellee94
author:michaellee94
 feat(CategoryTheory): characterize pullback squares via the `Over` category --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-category-theory new-contributor large-import 47/0 Mathlib/CategoryTheory/Comma/Over/Pullback.lean 1 3 ['github-actions', 'michaellee94'] nobody
7-60392
7 days ago
7-59646
7 days ago
0-2622
43 minutes
35198 j-loreaux
author:j-loreaux
 feat: generalize Hölder's inequality for sums to `Real.HolderTriple` Currently the API exists only for `Real.HolderConjugate`. This generalizes it in anticipation of #35197, which implements the Hölder framework for `lp` spaces. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-analysis 160/39 Mathlib/Analysis/MeanInequalities.lean,Mathlib/Data/Real/ConjExponents.lean 2 3 ['github-actions', 'mathlib-merge-conflicts'] ADedecker
assignee:ADedecker
7-56723
7 days ago
7-56746
7 days ago
24-95
24 days
34298 CoolRmal
author:CoolRmal
 feat(MeasureTheory): Integral over Ioi tends to zero This PR proves that if `f` is integrable on `Ioi a`, then `∫ x in Ioi (b i), f x ∂μ` tends to zero as `b i` tends to infinity. This is an easy corollary of `intervalIntegral_tendsto_integral_Ioi`. --- - [x] depends on #34197 - [x] depends on #34289 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-measure-probability awaiting-author 20/0 Mathlib/MeasureTheory/Integral/IntegralEqImproper.lean 1 7 ['CoolRmal', 'EtienneC30', 'github-actions', 'mcdoll'] thorimur
assignee:thorimur
7-55581
7 days ago
10-64272
10 days ago
42-25627
42 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 195/4 Mathlib.lean,Mathlib/Computability/Primrec.lean,Mathlib/Computability/Primrec/List.lean,Mathlib/Computability/Primrec/Nat.lean,Mathlib/Data/Nat/Log.lean 5 6 ['eric-wieser', 'github-actions', 'mathlib-merge-conflicts', 'mathlib4-merge-conflict-bot'] JovanGerb
assignee:JovanGerb
7-51660
7 days ago
7-51423
7 days ago
32-80856
32 days
36398 chrisflav
author:chrisflav
 feat(RingTheory): a finite étale algebra is étale locally finite split From Pi1. --- - [ ] depends on: #36399 [![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 296/5 Mathlib/LinearAlgebra/TensorProduct/Associator.lean,Mathlib/RingTheory/Etale/Basic.lean,Mathlib/RingTheory/Flat/Rank.lean,Mathlib/RingTheory/Localization/BaseChange.lean,Mathlib/RingTheory/Spectrum/Prime/Topology.lean,Mathlib/RingTheory/TensorProduct/Maps.lean,Mathlib/RingTheory/TotallySplit.lean,Mathlib/RingTheory/Unramified/Basic.lean 8 2 ['github-actions', 'mathlib-dependent-issues'] nobody
7-49974
7 days ago
7-50631
7 days ago
0-1558
25 minutes
36220 harahu
author:harahu
 doc(misc): update two theorem names - https://www.wikidata.org/wiki/Q1543149 carries the name "Sokhotski–Plemelj theorem" - While https://www.wikidata.org/wiki/Q2226807 does carry the name "Vantieghems theorem", I assume the s is assumed to be possessive, since the mathematician credited with the result is called Emmanuel Vantieghem. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) IMO 2/2 docs/1000.yaml 1 7 ['dwrensha', 'github-actions', 'harahu'] dwrensha
assignee:dwrensha
7-43548
7 days ago
11-34563
11 days ago
11-34518
11 days
23835 chrisflav
author:chrisflav
 feat(Topology): cardinality of connected components is bounded by cardinality of fiber We show that if `f : X → Y` is an open and closed map to `Y` and `Y` is connected, the number of connected components of `X` is bounded by the cardinality of the fiber of any point. In particular, if `Y` has finitely many connected components and `f` finite fibers, also `X` as finitely many connected components. From Pi1. --- - [x] depends on: #23849 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-topology 276/1 Mathlib.lean,Mathlib/Data/Fintype/Pi.lean,Mathlib/Data/Set/Lattice.lean,Mathlib/Topology/Clopen.lean,Mathlib/Topology/Connected/CardComponents.lean,Mathlib/Topology/Connected/Clopen.lean 6 11 ['chrisflav', 'erdOne', 'github-actions', 'leanprover-community-bot-assistant', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] grunweg
assignee:grunweg
7-41912
7 days ago
145-53901
145 days ago
66-69993
66 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'] kex-y
assignee:kex-y
7-35516
7 days ago
69-57338
69 days ago
69-57293
69 days
33683 joelriou
author:joelriou
 feat(AlgebraicTopology/SimplicialSet): the simplicial homotopy induced by an homotopy In this PR, we show that a homotopy between morphisms of simplicial sets (given as a morphism `X ⊗ Δ[1] ⟶ Y`) induces a "combinatorial" simplicial homotopy. WIP --- - [ ] depends on: #32881 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) blocked-by-other-PR t-algebraic-topology WIP merge-conflict 733/0 Mathlib.lean,Mathlib/AlgebraicTopology/SimplicialObject/SimplicialHomotopy.lean,Mathlib/AlgebraicTopology/SimplicialSet/Monoidal.lean,Mathlib/AlgebraicTopology/SimplicialSet/ProdStdSimplex.lean,Mathlib/AlgebraicTopology/SimplicialSet/ProdStdSimplexOne.lean,Mathlib/AlgebraicTopology/SimplicialSet/SimplicialHomotopy.lean,Mathlib/AlgebraicTopology/SimplicialSet/StdSimplex.lean,Mathlib/AlgebraicTopology/SimplicialSet/StdSimplexOne.lean 8 4 ['github-actions', 'mathlib-merge-conflicts', 'mathlib4-dependent-issues-bot'] nobody
7-35515
7 days ago
69-33911
69 days ago
0-2
2 seconds
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
7-34950
7 days ago
45-47648
45 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. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-set-theory merge-conflict 384/0 Mathlib.lean,Mathlib/SetTheory/Cardinal/Arithmetic.lean,Mathlib/SetTheory/Cardinal/Basic.lean,Mathlib/SetTheory/Cardinal/DeltaSystem.lean,Mathlib/SetTheory/Cardinal/Pigeonhole.lean,docs/references.bib 6 2 ['github-actions', 'mathlib-merge-conflicts'] alreadydone
assignee:alreadydone
7-34949
7 days ago
22-43543
22 days ago
22-44397
22 days
35317 mkaratarakis
author:mkaratarakis
 feat: lemmas for the analytic part of the proof of the Gelfond–Schneider theorem (Part 5/5) --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-number-theory new-contributor t-analysis awaiting-author 62/0 Mathlib/Analysis/Complex/CauchyIntegral.lean 1 15 ['MichaelStollBayreuth', 'github-actions', 'mkaratarakis'] MichaelStollBayreuth
assignee:MichaelStollBayreuth
7-33481
7 days ago
24-27207
24 days ago
29-30269
29 days
36416 j-loreaux
author:j-loreaux
 feat(Analysis/CStarAlgebra): norms of sums of orthogonal selfadjoint elements --- - [ ] depends on: #36407 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) blocked-by-other-PR 150/0 Mathlib/Analysis/CStarAlgebra/GelfandDuality.lean,Mathlib/Topology/ContinuousMap/Bounded/Normed.lean,Mathlib/Topology/ContinuousMap/Compact.lean 3 5 ['github-actions', 'mathlib-dependent-issues', 'themathqueen'] nobody
7-32131
7 days ago
7-35587
7 days ago
7-35542
7 days
35349 RemyDegenne
author:RemyDegenne
 feat: data processing inequality for the Kullback-Leibler divergence --- - [ ] depends on: #34841 - [x] depends on: #35089 - [ ] depends on: #27953 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) WIP t-measure-probability large-import blocked-by-other-PR 686/1 Mathlib.lean,Mathlib/Analysis/Convex/Deriv.lean,Mathlib/InformationTheory/KullbackLeibler/ChainRule.lean,Mathlib/InformationTheory/KullbackLeibler/DataProcessing.lean,Mathlib/MeasureTheory/Measure/Decomposition/IntegralRNDeriv.lean,Mathlib/MeasureTheory/Measure/Decomposition/RadonNikodym.lean 6 4 ['github-actions', 'mathlib-dependent-issues', 'mathlib-merge-conflicts'] nobody
7-31341
7 days ago
29-57486
29 days ago
0-1
1 second
36419 AntoineChambert-Loir
author:AntoineChambert-Loir
 feat(RingTheory/DividedPowerAlgebra/Init): add a computation lemma Add a lemma `DividedPowerAlgebra.pow_dp`. Co-authored with: @mariainesdff --- - [ ] depends on: #35804 - [ ] depends on: #35830 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) blocked-by-other-PR 433/20 Mathlib.lean,Mathlib/Analysis/Calculus/ContDiff/Bounds.lean,Mathlib/Data/List/ToFinsupp.lean,Mathlib/Data/Nat/Choose/Multinomial.lean,Mathlib/RingTheory/DividedPowerAlgebra/Init.lean 5 2 ['github-actions', 'mathlib-dependent-issues'] nobody
7-26337
7 days ago
7-28102
7 days ago
7-28057
7 days
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 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
7-18795
7 days ago
367-54146
367 days ago
15-14325
15 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) t-algebraic-geometry 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 4 ['MichaelStollBayreuth', 'Multramate', 'github-actions'] alexjbest
assignee:alexjbest
7-18794
7 days ago
10-55856
10 days ago
10-58075
10 days
35533 mariainesdff
author:mariainesdff
 feat(RingTheory/DedekindDomain/Ideal/Lemmas): add nontrivial_heightOneSpectrum Co-authored by: @xgenereux. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-ring-theory 12/0 Mathlib/RingTheory/DedekindDomain/Ideal/Lemmas.lean 1 4 ['erdOne', 'github-actions', 'mariainesdff', 'tb65536'] mattrobball
assignee:mattrobball
7-18790
7 days ago
12-76376
12 days ago
19-17076
19 days
35677 euprunin
author:euprunin
 chore(SetTheory): golf proofs This PR removes unused `have`/`haveI`/`let`/`letI` calls + some small similar cleanups. The goal of this golfing PR is to decrease the number of times lemmas are called explicitly (replacing calls to lemmas with calls to tactics). 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): * `Cardinal.mul_eq_self`: unchanged 🎉 * `Cardinal.succ_natCast`: unchanged 🎉 * `Ordinal.exists_fundamental_sequence`: unchanged 🎉 * `Cardinal.mk_subtype_le_of_countable_eventually_mem`: unchanged 🎉 * `Nat.card_image_of_injOn`: unchanged 🎉 * `mul_le_of_limit_aux`: unchanged 🎉 Profiled using `set_option trace.profiler true in`. This golfing PR is batched under the following guidelines: * Up to ~5 changed files per PR * Up to ~25 changed declarations per PR * Up to ~100 changed lines per PR --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-set-theory 2/11 Mathlib/SetTheory/Cardinal/Arithmetic.lean,Mathlib/SetTheory/Cardinal/Basic.lean,Mathlib/SetTheory/Cardinal/Cofinality.lean,Mathlib/SetTheory/Cardinal/CountableCover.lean,Mathlib/SetTheory/Cardinal/Finite.lean,Mathlib/SetTheory/Ordinal/Arithmetic.lean,Mathlib/SetTheory/ZFC/PSet.lean 7 4 ['euprunin', 'github-actions', 'leanprover-radar', 'vihdzp'] alreadydone
assignee:alreadydone
7-18788
7 days ago
21-79924
21 days ago
21-79879
21 days
36060 edegeltje
author:edegeltje
 chore(CategoryTheory/Classifier): namespace Classifier, rename HasClassifier, move file The declaration `CategoryTheory.Classifier` (and various lemmas about it) is/are moved to the `Subobject` namespace. The declaration `CategoryTheory.HasClassifier` is renamed `CategoryTheory.HasSubobjectClassifier`. The file `CategoryTheory/Topos/Classifier.lean` is moved to `CategoryTheory/Subobject/Classifier/Defs.lean`. Moves: - Classifier.SubobjectRepresentableBy.* -> SubobjectRepresentableBy.* - Classifier.* -> Subobject.Classifier.* - HasClassifier.* -> HasSubobjectClassifier.* --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) file-removed t-category-theory 191/41 Mathlib.lean,Mathlib/CategoryTheory/Subobject/Classifier/Defs.lean 2 4 ['dagurtomas', 'edegeltje', 'github-actions', 'mathlib-merge-conflicts'] joelriou
assignee:joelriou
7-18787
7 days ago
10-46614
10 days ago
12-62592
12 days
36093 tb65536
author:tb65536
 feat(GroupTheory/Nilpotent): remove `[IsNilpotent]` assumption from some theorems This PR uses the junk value of `nilpotencyClass` to remove `[IsNilpotent]` assumption from some theorems. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra t-group-theory
label:t-algebra$
 18/12 Mathlib/GroupTheory/Nilpotent.lean 1 1 ['github-actions'] riccardobrasca
assignee:riccardobrasca
7-18786
7 days ago
13-21542
13 days ago
13-21498
13 days
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`. --- - [ ] depends on: #31046 - [ ] depends on: #31222 - [ ] 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 841/8 Mathlib.lean,Mathlib/Algebra/Category/ModuleCat/Ext/BaseChange.lean,Mathlib/Algebra/Homology/DerivedCategory/Basic.lean,Mathlib/Algebra/Homology/DerivedCategory/Ext/Map.lean,Mathlib/Algebra/Homology/DerivedCategory/ShortExact.lean,Mathlib/Algebra/Homology/HomologicalComplexAbelian.lean,Mathlib/Algebra/Homology/HomotopyCategory/ShortExact.lean,Mathlib/Algebra/Module/FinitePresentation.lean,Mathlib/RingTheory/Flat/IsBaseChange.lean 9 4 ['github-actions', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
7-12435
7 days ago
77-65265
77 days ago
0-1554
25 minutes
31697 Thmoas-Guan
author:Thmoas-Guan
 feat(Homology): bijection between `Ext` For `F : C ⥤ D` fully faithful functor between abelian category, if one of the following 1: `C` has enough projectives and `F` preserve projective object 2: `D` has enough injectives and `F` preserve injective object The induced map `Ext X Y n → Ext F(X) F(Y) n` is bijective. --- - [ ] depends on: #31046 - [x] depends on: #31696 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra blocked-by-other-PR t-category-theory
label:t-algebra$
 360/8 Mathlib.lean,Mathlib/Algebra/Homology/DerivedCategory/Basic.lean,Mathlib/Algebra/Homology/DerivedCategory/Ext/Bijection.lean,Mathlib/Algebra/Homology/DerivedCategory/Ext/Map.lean,Mathlib/Algebra/Homology/DerivedCategory/ShortExact.lean,Mathlib/Algebra/Homology/HomologicalComplexAbelian.lean,Mathlib/Algebra/Homology/HomotopyCategory/ShortExact.lean 7 5 ['github-actions', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
7-12080
7 days ago
120-69050
120 days ago
0-1878
31 minutes
31768 Thmoas-Guan
author:Thmoas-Guan
 feat(Homology): `Ext` commute with ulift functor 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: #31697 - [ ] depends on: #31706 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra blocked-by-other-PR t-category-theory
label:t-algebra$
 554/8 Mathlib.lean,Mathlib/Algebra/Category/ModuleCat/Ext/Ulift.lean,Mathlib/Algebra/Homology/DerivedCategory/Basic.lean,Mathlib/Algebra/Homology/DerivedCategory/Ext/Bijection.lean,Mathlib/Algebra/Homology/DerivedCategory/Ext/Map.lean,Mathlib/Algebra/Homology/DerivedCategory/ShortExact.lean,Mathlib/Algebra/Homology/HomologicalComplexAbelian.lean,Mathlib/Algebra/Homology/HomotopyCategory/ShortExact.lean 8 6 ['github-actions', 'mathlib-merge-conflicts', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
7-11911
7 days ago
118-67217
118 days ago
0-2065
34 minutes
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$
 799/8 Mathlib.lean,Mathlib/Algebra/Category/ModuleCat/Baer.lean,Mathlib/Algebra/Category/ModuleCat/Ext/Ulift.lean,Mathlib/Algebra/Category/ModuleCat/InjectiveDimension.lean,Mathlib/Algebra/Homology/DerivedCategory/Basic.lean,Mathlib/Algebra/Homology/DerivedCategory/Ext/Bijection.lean,Mathlib/Algebra/Homology/DerivedCategory/Ext/Map.lean,Mathlib/Algebra/Homology/DerivedCategory/ShortExact.lean,Mathlib/Algebra/Homology/HomologicalComplexAbelian.lean,Mathlib/Algebra/Homology/HomotopyCategory/ShortExact.lean,Mathlib/Algebra/Homology/ShortComplex/ModuleCat.lean 11 6 ['github-actions', 'mathlib-merge-conflicts', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
7-11588
7 days ago
116-50963
116 days ago
0-8108
2 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 886/8 Mathlib.lean,Mathlib/Algebra/Category/ModuleCat/Baer.lean,Mathlib/Algebra/Category/ModuleCat/Ext/Ulift.lean,Mathlib/Algebra/Category/ModuleCat/InjectiveDimension.lean,Mathlib/Algebra/Homology/DerivedCategory/Basic.lean,Mathlib/Algebra/Homology/DerivedCategory/Ext/Bijection.lean,Mathlib/Algebra/Homology/DerivedCategory/Ext/Map.lean,Mathlib/Algebra/Homology/DerivedCategory/ShortExact.lean,Mathlib/Algebra/Homology/HomologicalComplexAbelian.lean,Mathlib/Algebra/Homology/HomotopyCategory/ShortExact.lean,Mathlib/Algebra/Homology/ShortComplex/ModuleCat.lean,Mathlib/RingTheory/Gorenstein/Defs.lean 12 7 ['github-actions', 'mathlib-merge-conflicts', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
7-11348
7 days ago
115-67901
115 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: #31046 - [ ] depends on: #32058 - [ ] depends on: #32081 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) blocked-by-other-PR t-ring-theory 915/8 Mathlib.lean,Mathlib/Algebra/Category/ModuleCat/Baer.lean,Mathlib/Algebra/Homology/DerivedCategory/Basic.lean,Mathlib/Algebra/Homology/DerivedCategory/Ext/Map.lean,Mathlib/Algebra/Homology/DerivedCategory/ShortExact.lean,Mathlib/Algebra/Homology/HomologicalComplexAbelian.lean,Mathlib/Algebra/Homology/HomotopyCategory/ShortExact.lean,Mathlib/Algebra/Homology/ShortComplex/ModuleCat.lean,Mathlib/RingTheory/Regular/InjectiveDimension.lean 9 6 ['github-actions', 'mathlib-merge-conflicts', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
7-11029
7 days ago
111-58894
111 days ago
0-1905
31 minutes
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 2295/8 Mathlib.lean,Mathlib/Algebra/Category/ModuleCat/Baer.lean,Mathlib/Algebra/Category/ModuleCat/Ext/BaseChange.lean,Mathlib/Algebra/Category/ModuleCat/Ext/Ulift.lean,Mathlib/Algebra/Category/ModuleCat/InjectiveDimension.lean,Mathlib/Algebra/Homology/DerivedCategory/Basic.lean,Mathlib/Algebra/Homology/DerivedCategory/Ext/Bijection.lean,Mathlib/Algebra/Homology/DerivedCategory/Ext/Map.lean,Mathlib/Algebra/Homology/DerivedCategory/ShortExact.lean,Mathlib/Algebra/Homology/HomologicalComplexAbelian.lean,Mathlib/Algebra/Homology/HomotopyCategory/ShortExact.lean,Mathlib/Algebra/Homology/ShortComplex/ModuleCat.lean,Mathlib/Algebra/Module/FinitePresentation.lean,Mathlib/RingTheory/Flat/IsBaseChange.lean,Mathlib/RingTheory/Gorenstein/Defs.lean,Mathlib/RingTheory/Gorenstein/Polynomial.lean,Mathlib/RingTheory/Regular/InjectiveDimension.lean 17 6 ['github-actions', 'mathlib-merge-conflicts', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
7-11023
7 days ago
77-59257
77 days ago
0-107
1 minute
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 large-import awaiting-author merge-conflict
label:t-algebra$
 634/0 Mathlib.lean,Mathlib/GroupTheory/Subgroup/Center.lean,Mathlib/RepresentationTheory/Homological/GroupCohomology/NonAbelian.lean,Mathlib/RepresentationTheory/Rep.lean 4 10 ['eric-wieser', 'github-actions', 'kbuzzard', 'mathlib-merge-conflicts', 'mathlib4-merge-conflict-bot', 'tb65536', 'xyzw12345'] eric-wieser
assignee:eric-wieser
6-79735
6 days ago
27-53768
27 days ago
35-32011
35 days
34077 kbuzzard
author:kbuzzard
 perf: increase priority of instSMulOfMul #31040 deprecated `Mul.toSMul` in place of the core instance `instSMulOfMul`, which is at a lowered priority of 910. This PR undeprecates it and makes it a higher priority instance (1100) which seems better for mathlib. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) This PR follows the philosophy seen in Mathlib's `Algebra.id : Algebra R R`, which also has raised priority. The idea is the same as `Algebra.id`: if you're looking for an instance of `Algebra R S` with R not equal to S then `Algebra.id` is extremely likely to fail quickly in practice, and if you're looking for an instance of `Algebra R R` then `Algebra.id` is unambiguously the right answer so should be tried ASAP. However the instance is defined so early in mathlib that in in practice it is tried last unless the priority is raised. The same philosophy holds here; if you're looking for an instance of `SMul X X` then you absolutely want to try `Mul.toSMul` first and if you're looking for an instance of `SMul X Y` with Y not X then `Mul.toSMul` will in practice be quick to fail. This PR was inspired by #33908 (another "this should be quick to fail and if it fits then it's almost certainly what we want" prio change) which made an instance of `IsScalarTower R A A` high priority and gave a performance boost. This PR also gives a performance boost. Note that the performance in #31040 looks very bad but the radar output is incorrect; there was a hardware change between the two runs. In fact #31040 produced no changes in profiling, as one might expect. I don't know the correct way to change the priority of a core instance in mathlib, and I didn't know if just changing the priority naively would work repo-wide rather than just file-wide, which was why this PR introduces a second instance. Zulip discussion at [#mathlib4 > priority hacks](https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/priority.20hacks/with/574353616) t-algebra awaiting-zulip merge-conflict
label:t-algebra$
 3/9 Mathlib/Algebra/Group/Action/Defs.lean,Mathlib/Algebra/Group/Action/Units.lean 2 26 ['alreadydone', 'github-actions', 'kbuzzard', 'leanprover-radar', 'mathlib-merge-conflicts'] jcommelin
assignee:jcommelin
6-78643
6 days ago
26-81490
26 days ago
0-56658
15 hours
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 - [ ] depends on: #34640 [![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
6-78519
6 days 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
6-78515
6 days 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
6-78498
6 days ago
12-63889
12 days ago
0-3
3 seconds
36239 plp127
author:plp127
 refactor(FieldTheory/KrullTopology): define uniform group structure on galois group --- [![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$
 271/176 Mathlib/FieldTheory/Galois/Infinite.lean,Mathlib/FieldTheory/Galois/Profinite.lean,Mathlib/FieldTheory/KrullTopology.lean,Mathlib/NumberTheory/Cyclotomic/CyclotomicCharacter.lean 4 16 ['github-actions', 'mathlib-merge-conflicts', 'plp127', 'vihdzp'] nobody
6-78496
6 days ago
unknown
0-0
0 seconds
36431 sgouezel
author:sgouezel
 new inferPercent experiment --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict 33386/12839 .github/actions/get-mathlib-ci/README.md,.github/actions/get-mathlib-ci/action.yml,.github/workflows/PR_summary.yml,.github/workflows/actionlint.yml,.github/workflows/build_template.yml,.github/workflows/commit_verification.yml,.github/workflows/daily-master-tag.yml,.github/workflows/docker_build.yml,.github/workflows/export_telemetry.yaml,.github/workflows/label_new_contributor.yml,.github/workflows/latest_import.yml,.github/workflows/long_file_report.yml,.github/workflows/maintainer_bors.yml,.github/workflows/maintainer_bors_wf_run.yml,.github/workflows/maintainer_merge.yml,.github/workflows/maintainer_merge_wf_run.yml,.github/workflows/nightly-regression-report.yml,.github/workflows/nightly_bump_and_merge.yml,.github/workflows/nightly_detect_failure.yml,.github/workflows/technical_debt_metrics.yml,.github/workflows/update_dependencies_zulip.yml,.github/workflows/validate_mathlib_ci_paths.yml,.github/workflows/weekly-lints.yml,.github/workflows/zulip_emoji_ci_status.yaml,.github/workflows/zulip_emoji_closed_pr.yaml,.github/workflows/zulip_emoji_labelling.yaml,.github/workflows/zulip_emoji_merge_delegate.yaml,Archive/Examples/Kuratowski.lean,Archive/Imo/Imo2024Q6.lean,Archive/Imo/Imo2025Q3.lean,Archive/Sensitivity.lean,Archive/Wiedijk100Theorems/BallotProblem.lean,Archive/Wiedijk100Theorems/CubingACube.lean,Archive/Wiedijk100Theorems/Konigsberg.lean,Cache/IO.lean,Cache/Requests.lean,Counterexamples/AharoniKorman.lean,Counterexamples/CanonicallyOrderedCommSemiringTwoMul.lean,Counterexamples/HeawoodUnitDistance.lean,Counterexamples/HomogeneousPrimeNotPrime.lean,Counterexamples/InvertibleModuleNotIdeal.lean,Mathlib.lean,Mathlib/Algebra/Algebra/Equiv.lean,Mathlib/Algebra/Algebra/Spectrum/Basic.lean,Mathlib/Algebra/Algebra/Subalgebra/Basic.lean,Mathlib/Algebra/Algebra/Subalgebra/Lattice.lean,Mathlib/Algebra/Algebra/Subalgebra/Operations.lean,Mathlib/Algebra/Algebra/ZMod.lean,Mathlib/Algebra/BigOperators/Fin.lean,Mathlib/Algebra/BigOperators/Finprod.lean,Mathlib/Algebra/BigOperators/Group/Finset/Gaps.lean,Mathlib/Algebra/BigOperators/Ring/Nat.lean,Mathlib/Algebra/Category/AlgCat/Limits.lean,Mathlib/Algebra/Category/BoolRing.lean,Mathlib/Algebra/Category/CommAlgCat/Basic.lean,Mathlib/Algebra/Category/CommAlgCat/FiniteType.lean,Mathlib/Algebra/Category/CommBialgCat.lean,Mathlib/Algebra/Category/FGModuleCat/Basic.lean,Mathlib/Algebra/Category/FGModuleCat/EssentiallySmall.lean,Mathlib/Algebra/Category/Grp/AB.lean,Mathlib/Algebra/Category/Grp/FiniteGrp.lean,Mathlib/Algebra/Category/Grp/LeftExactFunctor.lean,Mathlib/Algebra/Category/Grp/Limits.lean,Mathlib/Algebra/Category/Grp/Shrink.lean,Mathlib/Algebra/Category/ModuleCat/ChangeOfRings.lean,Mathlib/Algebra/Category/ModuleCat/ExteriorPower.lean,Mathlib/Algebra/Category/ModuleCat/Kernels.lean,Mathlib/Algebra/Category/ModuleCat/Limits.lean,Mathlib/Algebra/Category/ModuleCat/Localization.lean,Mathlib/Algebra/Category/ModuleCat/Monoidal/Basic.lean,Mathlib/Algebra/Category/ModuleCat/Presheaf.lean,Mathlib/Algebra/Category/ModuleCat/Presheaf/ChangeOfRings.lean,Mathlib/Algebra/Category/ModuleCat/Presheaf/EpiMono.lean,Mathlib/Algebra/Category/ModuleCat/Presheaf/Monoidal.lean,Mathlib/Algebra/Category/ModuleCat/Presheaf/Pullback.lean,Mathlib/Algebra/Category/ModuleCat/Presheaf/Sheafification.lean,Mathlib/Algebra/Category/ModuleCat/Presheaf/Sheafify.lean,Mathlib/Algebra/Category/ModuleCat/Sheaf.lean,Mathlib/Algebra/Category/ModuleCat/Sheaf/Abelian.lean,Mathlib/Algebra/Category/ModuleCat/Sheaf/ChangeOfRings.lean,Mathlib/Algebra/Category/ModuleCat/Sheaf/Colimits.lean,Mathlib/Algebra/Category/ModuleCat/Sheaf/Limits.lean,Mathlib/Algebra/Category/ModuleCat/Sheaf/Localization.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/MonCat/Limits.lean,Mathlib/Algebra/Category/MonCat/Shrink.lean,Mathlib/Algebra/Category/Ring/Basic.lean,Mathlib/Algebra/Category/Ring/Constructions.lean,Mathlib/Algebra/Category/Ring/Epi.lean,Mathlib/Algebra/Category/Ring/Limits.lean,Mathlib/Algebra/CharP/Defs.lean,Mathlib/Algebra/Colimit/Module.lean,Mathlib/Algebra/DirectSum/Basic.lean,Mathlib/Algebra/DirectSum/Decomposition.lean,Mathlib/Algebra/DirectSum/Internal.lean,Mathlib/Algebra/DirectSum/Module.lean,Mathlib/Algebra/DirectSum/Ring.lean 1883 2 ['github-actions', 'mathlib-bors'] nobody
6-75410
6 days ago
6-75409
6 days ago
0-91
1 minute
31046 Thmoas-Guan
author:Thmoas-Guan
 feat(Homology) : compatibility of map between `Ext` In this PR, we proved the compatibility of map between `Ext` induced by exact functor with 1: `mk_0` 2: `comp` 3: `extClass` --- - [x] depends on: #31707 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-category-theory 232/8 Mathlib/Algebra/Homology/DerivedCategory/Basic.lean,Mathlib/Algebra/Homology/DerivedCategory/Ext/Map.lean,Mathlib/Algebra/Homology/DerivedCategory/ShortExact.lean,Mathlib/Algebra/Homology/HomologicalComplexAbelian.lean,Mathlib/Algebra/Homology/HomotopyCategory/ShortExact.lean 5 35 ['Thmoas-Guan', 'dagurtomas', 'github-actions', 'joelriou', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot', 'robin-carlier'] eric-wieser
assignee:eric-wieser
6-70420
6 days ago
7-12819
7 days ago
31-37175
31 days
35804 mariainesdff
author:mariainesdff
 feat(RingTheory/DividedPowerAlgebra/Init): add universal divided power algebra We define the universal divided power algebra of an `R`-module `M`. Co-authored by @AntoineChambert-Loir --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-ring-theory 284/0 Mathlib.lean,Mathlib/RingTheory/DividedPowerAlgebra/Init.lean 2 1 ['github-actions'] mattrobball
assignee:mattrobball
6-66871
6 days ago
6-66941
6 days ago
18-57481
18 days
35880 astrainfinita
author:astrainfinita
 feat(Order/Defs/LinearOrder): `min_ind` It will be used to simplify the proofs of other lemmas in a subsequent PR. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-order 11/0 Mathlib/Order/Defs/LinearOrder.lean 1 1 ['github-actions'] bryangingechen
assignee:bryangingechen
6-64223
6 days ago
16-85731
16 days ago
16-85686
16 days
36438 JovanGerb
author:JovanGerb
 chore(Algebra/Field/Basic): remove `inv a := a⁻¹` from `Field.toGrindField` instance This PR removes a `inv a := a⁻¹` field from an instance. We have seen before that this is good for performance. This also just so happens to help fix a failure (https://leanprover.zulipchat.com/#narrow/channel/113488-general/topic/backward.2EisDefEq.2ErespectTransparency/near/576527956). --- - [ ] depends on: #36395 [![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$
 1/2 Mathlib/Algebra/Field/Basic.lean 1 2 ['github-actions', 'mathlib-dependent-issues'] nobody
6-60357
6 days ago
6-62918
6 days ago
0-2327
38 minutes
35657 Rida-Hamadani
author:Rida-Hamadani
 feat(SimpleGraph): distance equal or greater than two in terms of common neighborhood Two lemmas classifying distances between two vertices according two their common neighborhood. This is the fork version of #12278. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-combinatorics 33/0 Mathlib/Combinatorics/SimpleGraph/Metric.lean,Mathlib/Data/ENat/Basic.lean 2 9 ['Rida-Hamadani', 'SnirBroshi', 'github-actions', 'vlad902'] nobody
6-54032
6 days ago
6-53836
6 days ago
11-39779
11 days
36434 mariainesdff
author:mariainesdff
 feat(RingTheory.DividedPowerAlgebra.Init.lean): add weak universal property and functoriality Co-authored by @AntoineChambert-Loir. --- - [ ] depends on: #35804 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-ring-theory blocked-by-other-PR 491/0 Mathlib.lean,Mathlib/RingTheory/DividedPowerAlgebra/Init.lean 2 3 ['github-actions', 'mathlib-dependent-issues'] nobody
6-53716
6 days ago
6-55595
6 days ago
6-55558
6 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
6-53619
6 days ago
20-13527
20 days ago
0-122
2 minutes
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 4777/32 Mathlib.lean,Mathlib/Algebra/Category/ModuleCat/Baer.lean,Mathlib/Algebra/Category/ModuleCat/Ext/BaseChange.lean,Mathlib/Algebra/Category/ModuleCat/Ext/Ulift.lean,Mathlib/Algebra/Category/ModuleCat/InjectiveDimension.lean,Mathlib/Algebra/Homology/DerivedCategory/Basic.lean,Mathlib/Algebra/Homology/DerivedCategory/Ext/Bijection.lean,Mathlib/Algebra/Homology/DerivedCategory/Ext/Map.lean,Mathlib/Algebra/Homology/DerivedCategory/ShortExact.lean,Mathlib/Algebra/Homology/HomologicalComplexAbelian.lean,Mathlib/Algebra/Homology/HomotopyCategory/ShortExact.lean,Mathlib/Algebra/Homology/ShortComplex/ModuleCat.lean,Mathlib/Algebra/Module/FinitePresentation.lean,Mathlib/CategoryTheory/Abelian/Projective/Dimension.lean,Mathlib/RingTheory/CohenMacaulay/Basic.lean,Mathlib/RingTheory/Flat/IsBaseChange.lean,Mathlib/RingTheory/Gorenstein/CohenMacaulay.lean,Mathlib/RingTheory/Gorenstein/Defs.lean,Mathlib/RingTheory/Ideal/Operations.lean,Mathlib/RingTheory/Ideal/Quotient/Operations.lean,Mathlib/RingTheory/Regular/Category.lean,Mathlib/RingTheory/Regular/Depth.lean,Mathlib/RingTheory/Regular/InjectiveDimension.lean,Mathlib/RingTheory/Regular/Ischebeck.lean,Mathlib/RingTheory/Regular/ProjectiveDimension.lean,Mathlib/RingTheory/Regular/RegularSequence.lean 26 6 ['github-actions', 'mathlib-merge-conflicts', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
6-51226
6 days ago
77-58345
77 days ago
0-264
4 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 2 ['github-actions', 'mathlib-dependent-issues'] nobody
6-49944
6 days ago
7-42978
7 days ago
7-42933
7 days
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
6-46259
6 days ago
unknown
0-0
0 seconds
34848 bjornsolheim
author:bjornsolheim
 feat(Analysis/Convex/Cone): min and max tensor products are equal when one factor is simplicial and generating Prove that min and max tensor products are equal when one factor is simplicial and generating. Add theorems: minTensorProduct_eq_max_of_simplicial_generating_left minTensorProduct_eq_max_of_simplicial_generating_right --- - [ ] depends on: #32355 [new file simplicial.lean] [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-analysis awaiting-author 172/0 Mathlib.lean,Mathlib/Analysis/Convex/Cone/TensorProduct.lean 2 17 ['bjornsolheim', 'github-actions', 'j-loreaux', 'joneugster', 'mathlib-dependent-issues', 'mathlib-merge-conflicts'] j-loreaux
assignee:j-loreaux
6-42859
6 days ago
10-51273
10 days ago
19-62693
19 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 awaiting-author 135/52 Mathlib/Analysis/ODE/PicardLindelof.lean,Mathlib/Geometry/Manifold/IntegralCurve/ExistUnique.lean,Mathlib/Order/Filter/Prod.lean 3 6 ['github-actions', 'leanprover-community-bot-assistant', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot', 'ocfnash', 'winstonyin'] ocfnash
assignee:ocfnash
6-42020
6 days ago
14-18756
14 days ago
14-18781
14 days
36451 SnirBroshi
author:SnirBroshi
 feat(Combinatorics/SimpleGraph/Matching): `edgeSet` is injective and strictly monotonic on matchings, and more API --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-combinatorics 45/11 Mathlib/Combinatorics/SimpleGraph/Matching.lean,Mathlib/Combinatorics/SimpleGraph/Subgraph.lean,Mathlib/Data/Sym/Sym2.lean 3 1 ['github-actions'] nobody
6-40911
6 days ago
6-41528
6 days ago
6-41616
6 days
34249 xyzw12345
author:xyzw12345
 feat(GroupTheory/GroupAction/Hom): connect existing definitions `MulDistribMulActionHom` and `DistribMulActionHom` using `to_additive` In this PR, we defined `MulDistribMulActionHom` corresponding to `DistribMulActionHom`, which will be used in the multiplicative version of non-Abelian group cohomology. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra delegated awaiting-author
label:t-algebra$
 174/69 Mathlib/Algebra/GroupWithZero/Action/Defs.lean,Mathlib/GroupTheory/GroupAction/Hom.lean 2 7 ['github-actions', 'mathlib-bors', 'ocfnash'] ocfnash
assignee:ocfnash
6-35729
6 days ago
24-47947
24 days ago
29-31450
29 days
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
6-33468
6 days ago
55-34778
55 days ago
0-46829
13 hours
30329 luigi-massacci
author:luigi-massacci
 feat(Analysis/Distribution/TestFunction): integrating against a measure as a continuous linear map on test functions --- - [ ] depends on: #30004 - [ ] depends on: #32228 - [ ] depends on: #30327 - [x] depends on: #31806 - [x] depends on: #31533 - [x] depends on: #31470 - [ ] depends on: #30255 - [ ] depends on: #30253 - [ ] depends on: #30240 - [ ] 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 blocked-by-other-PR t-analysis 999/6 Mathlib.lean,Mathlib/Analysis/Distribution/ContDiffMapSupportedIn.lean,Mathlib/Analysis/Distribution/TestFunction.lean,Mathlib/Data/ENat/Basic.lean,Mathlib/Data/Set/Function.lean,Mathlib/MeasureTheory/Integral/BoundedContinuousFunction.lean,Mathlib/MeasureTheory/Integral/TestAgainst.lean 7 4 ['github-actions', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
6-30465
6 days ago
159-60667
159 days ago
0-766
12 minutes
30327 luigi-massacci
author:luigi-massacci
 feat(Analysis/Distribution/TestFunction): add characterizations of continuity for linear maps on test functions --- - [ ] depends on: #31806 - [x] depends on: #30309 - [x] depends on: #31470 - [ ] depends on: #30255 - [ ] depends on: #30253 - [ ] depends on: #30240 - [ ] 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 blocked-by-other-PR t-analysis 774/5 Mathlib.lean,Mathlib/Analysis/Distribution/ContDiffMapSupportedIn.lean,Mathlib/Analysis/Distribution/TestFunction.lean,Mathlib/Data/ENat/Basic.lean,Mathlib/Data/Set/Function.lean 5 4 ['github-actions', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
6-30464
6 days ago
159-62920
159 days ago
0-64
1 minute
30255 luigi-massacci
author:luigi-massacci
 feat(Analysis/Distribution/ContDiffMapSupportedIn): specialize singleton seminorm family for D_K^n when n finite Co-authored by: @ADedecker --- - [ ] depends on: #30253 - [ ] depends on: #30240 - [ ] depends on: #30239 - [ ] depends on: #30236 - [ ] depends on: #30202 - [ ] depends on: #30201 - [ ] depends on: #30199 - [ ] depends on: #30198 - [ ] depends on: #30197 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict blocked-by-other-PR t-analysis 476/3 Mathlib/Analysis/Distribution/ContDiffMapSupportedIn.lean,Mathlib/Data/ENat/Basic.lean,Mathlib/Data/Set/Function.lean 3 4 ['github-actions', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
6-30461
6 days ago
162-38468
162 days ago
0-126
2 minutes
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 463/18 Mathlib/Analysis/Distribution/ContDiffMapSupportedIn.lean 1 5 ['github-actions', 'mathlib-dependent-issues', 'mathlib4-merge-conflict-bot'] nobody
6-28843
6 days ago
162-38466
162 days ago
0-599
9 minutes
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 2 ['github-actions', 'j-loreaux'] nobody
6-27344
6 days ago
33-73087
33 days ago
33-73042
33 days
34637 mcdoll
author:mcdoll
 feat(Analysis/Distribution): support We define the support of distributions. The definition applies to both tempered and classical distributions, but for this PR we only prove some elementary statements for tempered distributions. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-analysis 255/0 Mathlib.lean,Mathlib/Analysis/Distribution/Support.lean,Mathlib/Topology/MetricSpace/Bounded.lean 3 21 ['ADedecker', 'github-actions', 'lauramonk', 'mcdoll', 'urkud'] ADedecker
assignee:ADedecker
6-27083
6 days ago
7-47363
7 days ago
32-59547
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. (1/2) 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 239/1 Mathlib.lean,Mathlib/Topology/Order/ScottTopology.lean,Mathlib/Topology/Order/ScottTopologyDCPO.lean,docs/references.bib 4 66 ['b-mehta', 'edwin1729', 'github-actions', 'mathlib-merge-conflicts', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot', 'plp127'] b-mehta
assignee:b-mehta
6-25884
6 days ago
9-59924
9 days ago
16-26196
16 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 510/1 Mathlib.lean,Mathlib/Topology/Order/ScottTopology.lean,Mathlib/Topology/Order/ScottTopologyDCPO.lean,docs/references.bib 4 4 ['github-actions', 'mathlib-merge-conflicts', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
6-25226
6 days ago
unknown
0-0
0 seconds
35907 JJYYY-JJY
author:JJYYY-JJY
 fix(Topology/Defs/Basic): preserve noncanonical topology instances in delaboration Preserve noncanonical topology instances in delaboration. Restore local instances before checking whether topology arguments can be omitted during delaboration, and print `IsOpen[t]`, `IsClosed[t]`, `closure[t]`, and `Continuous[t₁, t₂]` when the topology instances are not canonical in the current local-instance context. Previously, pretty-printing could silently drop noncanonical topology arguments, so declarations such as `LinearMap.mem_span_iff_continuous_of_finite` were rendered as if they used the default topology. Closes #33238 t-topology new-contributor 147/0 Mathlib/Topology/Defs/Basic.lean,MathlibTest/TopologyNonstandardNotation.lean 2 7 ['JJYYY-JJY', 'copilot-pull-request-reviewer', 'github-actions', 'j-loreaux'] j-loreaux
assignee:j-loreaux
6-24757
6 days ago
6-50244
6 days ago
9-45896
9 days
36105 LLaurance
author:LLaurance
 chore(Algebra): shorten proofs, style Golf, avoid terminal `simp only`, use namespaces where available, etc. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra WIP
label:t-algebra$
 119/165 Mathlib/Algebra/CubicDiscriminant.lean,Mathlib/Algebra/DualQuaternion.lean,Mathlib/Algebra/Exact.lean,Mathlib/Algebra/Free.lean,Mathlib/Algebra/FreeAlgebra.lean,Mathlib/Algebra/Star/Basic.lean,Mathlib/Algebra/Star/Center.lean,Mathlib/Algebra/Star/CentroidHom.lean 8 2 ['LLaurance', 'github-actions'] dagurtomas
assignee:dagurtomas
6-22672
6 days ago
unknown
0-0
0 seconds
35910 LLaurance
author:LLaurance
 chore(Probability): remove deprecated items, shorten proofs Remove deprecated items, shorten proofs, use dot notation where possible, style --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-measure-probability WIP 63/131 Mathlib/Probability/Distributions/Exponential.lean,Mathlib/Probability/Distributions/Gamma.lean,Mathlib/Probability/Distributions/Geometric.lean,Mathlib/Probability/Distributions/Pareto.lean,Mathlib/Probability/Distributions/Poisson/Basic.lean,Mathlib/Probability/Distributions/Uniform.lean 6 3 ['LLaurance', 'github-actions', 'mathlib-merge-conflicts'] nobody
6-22654
6 days ago
10-552
10 days ago
15-67979
15 days
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
6-22322
6 days ago
90-34155
90 days ago
9-42873
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 506/0 Mathlib/Analysis/Distribution/Sobolev.lean,Mathlib/Analysis/Distribution/TemperedDistribution.lean 2 7 ['CoolRmal', 'github-actions', 'mathlib-dependent-issues', 'mathlib4-merge-conflict-bot'] nobody
6-21516
6 days ago
80-17496
80 days ago
0-1
1 second
35649 JovanGerb
author:JovanGerb
 feat(Order/GaloisConnection/Defs): use `to_dual` for `GaloisInsertion`/`GaloisCoinsertion` This PR uses `to_dual` to generate declarations about `GaloisCoinsertion` from those for `GaloisInsertion`. - An entry is added to the name translation dictionary for this particular name translation. - One lemma in another file had to be tagged. - Some uses of `to_dual` have been replaced with `to_dual none`, because I had written them before `to_dual none` existed. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-order 42/84 Mathlib/Algebra/Group/Submonoid/Units.lean,Mathlib/Order/GaloisConnection/Defs.lean,Mathlib/Order/Monotone/Defs.lean,Mathlib/Tactic/Translate/ToDual.lean,Mathlib/Topology/Order.lean 5 5 ['JovanGerb', 'github-actions', 'mathlib-merge-conflicts', 'vihdzp'] nobody
6-20568
6 days ago
6-20597
6 days ago
9-56831
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 53/0 Mathlib.lean,Mathlib/RingTheory/Localization/Saturation.lean 2 11 ['alreadydone', 'chrisflav', 'github-actions', 'kckennylau', 'mathlib-dependent-issues', 'mathlib4-merge-conflict-bot'] mattrobball
assignee:mattrobball
6-18787
6 days ago
11-51730
11 days ago
11-53571
11 days
32033 Thmoas-Guan
author:Thmoas-Guan
 feat(Algebra): injective dimension equal supremum of localized module In this PR, we proved that for module over Noetherian ring, projective dimension is equal to the supremum of injective dimension of localized modules over all prime/maximal ideals. --- - [ ] depends on: #31995 - [ ] depends on: #31998 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra
label:t-algebra$
 184/0 Mathlib.lean,Mathlib/RingTheory/LocalProperties/InjectiveDimension.lean 2 4 ['github-actions', 'mathlib-dependent-issues', 'mathlib-merge-conflicts', 'mathlib4-merge-conflict-bot'] ocfnash
assignee:ocfnash
6-18786
6 days ago
9-84992
9 days ago
10-1052
10 days
34031 lua-vr
author:lua-vr
 feat(Dynamics/BirkhoffSum): add the maximal ergodic theorem --- This file exports three constants: ```lean public def birkhoffAverageSupSet (f : α → α) (g : α → ℝ) (a : ℝ) : Set α := {x | ∃ n : ℕ, a < birkhoffAverage ℝ f g n x} public theorem meas_birkhoffAverageSupSet_smul_const_le_integral (a : ℝ) (ha : 0 < a) : μ.real (birkhoffAverageSupSet f g a) • a ≤ ∫ x in birkhoffAverageSupSet f g a, g x ∂μ public theorem meas_birkhoffAverageSupSet_smul_const_le_norm (a : ℝ) (ha : 0 < a) : μ.real (birkhoffAverageSupSet f (fun x ↦ ‖g x‖) a) • a ≤ ∫ x, ‖g x‖ ∂μ ``` In my interpretation, the other constants are auxiliary, so I did not make them public. If it's of independent interest, `birkhoffMax` could be exported or moved to a dedicated file, but I'm not sure of that at the moment. - [x] depends on: #34030 - [x] depends on: #34029 - [x] depends on: #34025 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-dynamics 291/0 Mathlib.lean,Mathlib/Dynamics/BirkhoffSum/Maximal.lean 2 4 ['github-actions', 'lua-vr', 'mathlib-dependent-issues', 'mathlib-merge-conflicts'] urkud
assignee:urkud
6-18785
6 days ago
11-60328
11 days ago
11-60653
11 days
35709 tb65536
author:tb65536
 feat(AlgebraicGeometry/EllipticCurve/Reduction): define multiplicative and additive reduction This PR adds definitions of multiplicative and additive reduction. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra t-algebraic-geometry t-number-theory
label:t-algebra$
 86/5 Mathlib/AlgebraicGeometry/EllipticCurve/Reduction.lean 1 6 ['Multramate', 'github-actions', 'tb65536'] riccardobrasca
assignee:riccardobrasca
6-18782
6 days ago
20-79323
20 days ago
20-79279
20 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 --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor t-measure-probability 392/33 Mathlib/Analysis/Convex/Basic.lean,Mathlib/Analysis/Convex/Body.lean,Mathlib/Analysis/Convex/Gauge.lean,Mathlib/LinearAlgebra/FiniteDimensional/Lemmas.lean,Mathlib/LinearAlgebra/LinearIndependent/Lemmas.lean,Mathlib/MeasureTheory/Group/GeometryOfNumbers.lean 6 3 ['github-actions', 'joneugster'] urkud
assignee:urkud
6-18781
6 days ago
18-7730
18 days ago
18-10651
18 days
36155 grunweg
author:grunweg
 feat: custom elaborators for TangentSpace and tangentMap(Within) --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-differential-geometry 58/28 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 7 2 ['github-actions', 'mathlib-merge-conflicts'] sgouezel
assignee:sgouezel
6-18776
6 days ago
11-21986
11 days ago
1-9762
1 day
36214 kebekus
author:kebekus
 feat: trivial lemmas and simp lemmas concerning `iteratedFDeriv` and `taylorSeries` To prepare for upcoming PRs, add several trivial lemmas and simp lemmas concerning `iteratedFDeriv` and `taylorSeries`. Use `@[to_fun]` to port several existing statements to match new style conventions. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-analysis 94/6 Mathlib/Analysis/Calculus/ContDiff/Basic.lean,Mathlib/Analysis/Calculus/ContDiff/FTaylorSeries.lean,Mathlib/Analysis/Calculus/ContDiff/Operations.lean,Mathlib/Analysis/Distribution/TemperateGrowth.lean,Mathlib/LinearAlgebra/Multilinear/Basic.lean,Mathlib/Topology/Algebra/Module/Multilinear/Basic.lean 6 7 ['github-actions', 'grunweg', 'kebekus'] j-loreaux
assignee:j-loreaux
6-18774
6 days ago
11-48481
11 days ago
0-11
11 seconds
36278 kebekus
author:kebekus
 feat: Poisson Integral Formula for harmonic functions Establish two versions of the Poisson Integral Formula for harmonic functions on arbitrary disks in the complex plane, formulated with the real part of the Herglotz–Riesz kernel of integration and with the Poisson kernel, respectively. This material is used in [Project VD](https://github.com/kebekus/ProjectVD), formalizing Value Distribution Theory for meromorphic functions on the complex plane. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-analysis 111/0 Mathlib.lean,Mathlib/Analysis/Complex/Harmonic/Poisson.lean,Mathlib/Analysis/Complex/Poisson.lean 3 1 ['github-actions'] j-loreaux
assignee:j-loreaux
6-18773
6 days ago
unknown
0-0
0 seconds
36328 Multramate
author:Multramate
 feat(AlgebraicGeometry/EllipticCurve): improve API for maps and base changes Dot notation for concrete Weierstrass curves (`Affine`/`Jacobian`/`Projective`) does not quite work on `W : WeierstrassCurve F` even though they're all abbreviations of `WeierstrassCurve`, which is annoying for functions that return `WeierstrassCurve`s (currently just `map`, `baseChange`, and `variableChange`). For instance, for an `A : Affine F`, the expression `A.baseChange K` is a `WeierstrassCurve K` rather than an `Affine K`, so `(A.baseChange K).polynomial` will not work since `polynomial` is a function of `Affine K` rather than `WeierstrassCurve K`; instead we have to do `(A.baseChange K).toAffine.polynomial`, which is wordy. This PR introduces abbreviations `Affine/Jacobian/Projective.map/baseChange` to get around this, and introduces scoped notations `W/K`, where the slashes are given by `\textf`. The notation `W⟮K⟯` for `(W.baseChange K)Point` seems to be useless so far and can now be replaced by `(W/K).Point`. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebraic-geometry 284/288 Mathlib/AlgebraicGeometry/EllipticCurve/Affine/Basic.lean,Mathlib/AlgebraicGeometry/EllipticCurve/Affine/Formula.lean,Mathlib/AlgebraicGeometry/EllipticCurve/Affine/Point.lean,Mathlib/AlgebraicGeometry/EllipticCurve/DivisionPolynomial/Basic.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/AlgebraicGeometry/EllipticCurve/Reduction.lean,Mathlib/AlgebraicGeometry/EllipticCurve/VariableChange.lean,Mathlib/AlgebraicGeometry/EllipticCurve/Weierstrass.lean 13 1 ['github-actions'] alexjbest
assignee:alexjbest
6-18767
6 days ago
9-31260
9 days ago
9-31847
9 days
36332 mike1729
author:mike1729
 feat(Analysis/Normed/Module/WeakDual): register bornology and boundedness API ## Description This PR registers `Bornology` instance and introduces a boundedness API as discussed [on Zulip](https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/instBornology.20for.20WeakSpace.20and.20WeakDual/with/577457935). ### Main additions - **`WeakDual.instBornology`**: Bornology instance on `WeakDual 𝕜 E` inherited from `StrongDual 𝕜 E` via `inferInstanceAs`. This makes `IsBounded` available directly on weak dual sets, where boundedness means operator-norm boundedness. - **`isVonNBounded_iff_pointwise_bounded`**: A set `s` in `WeakDual 𝕜 E` is von Neumann bounded (w.r.t. the weak-* topology) iff it is pointwise bounded: every `x : E` has `‖f x‖ ≤ r x` for all `f ∈ s`. - **`isBounded_iff_isVonNBounded`**: For normed spaces over `ℝ` or `ℂ`, norm-boundedness and weak-* von Neumann boundedness coincide (via Banach–Steinhaus). - **`isBounded_iff_pointwise_bounded`**: Combines the above two: norm-boundedness ↔ pointwise boundedness. - **`isBounded_polar`** and **`isBounded_closedBall`**: Standalone lemmas replacing repeated inline `isBounded_toStrongDual_preimage_iff_isBounded.mpr ...` patterns. - **Simp lemmas**: `isBounded_toStrongDual_preimage_iff_isBounded` and `isBounded_toWeakDual_preimage_iff_isBounded` for translating between weak and strong dual boundedness. ### API simplification The existing lemmas `isClosed_image_coe_of_bounded_of_closed`, `isCompact_of_bounded_of_closed`, and `isSeqCompact_of_isBounded_of_isClosed` now take `IsBounded s` directly instead of the more verbose `IsBounded (StrongDual.toWeakDual ⁻¹' s)`, since the two are definitionally equal with the new bornology instance. ### Minor changes - Replaced `grind` tactic usage with explicit term - Fixed deprecation dates from 2024-11-19 to 2025-11-19 - Renamed local variable `F` to `E` for consistency with the rest of the file - Added comprehensive module and declaration docstrings --- - [ ] depends on: — - [ ] modifies an existing declaration: yes (simplified signatures of `isClosed_image_coe_of_bounded_of_closed`, `isCompact_of_bounded_of_closed`, `isSeqCompact_of_isBounded_of_isClosed`) - [ ] adds new declarations: yes (`instBornology`, `isBounded_toStrongDual_preimage_iff_isBounded`, `isBounded_toWeakDual_preimage_iff_isBounded`, `isVonNBounded_iff_pointwise_bounded`, `isBounded_iff_isVonNBounded`, `isBounded_iff_pointwise_bounded`, `isBounded_closedBall`, `isBounded_polar`) --- Open in Gitpod --> [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor t-analysis 205/70 Mathlib/Analysis/Normed/Module/WeakDual.lean 1 2 ['github-actions'] j-loreaux
assignee:j-loreaux
6-18766
6 days ago
9-36335
9 days ago
9-36392
9 days
36121 LLaurance
author:LLaurance
 chore(Analysis): shorten proofs Golf, shorten, etc. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-analysis awaiting-author WIP 231/399 Mathlib/Analysis/Calculus/Deriv/Inv.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/Norm.lean,Mathlib/Analysis/Calculus/LHopital.lean,Mathlib/Analysis/Calculus/MeanValue.lean,Mathlib/Analysis/Calculus/Monotone.lean,Mathlib/Analysis/ODE/Gronwall.lean,Mathlib/Analysis/ODE/PicardLindelof.lean 11 13 ['LLaurance', 'erdOne', 'github-actions', 'j-loreaux'] j-loreaux
assignee:j-loreaux
6-7097
6 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 72/3 Mathlib/Combinatorics/SimpleGraph/AdjMatrix.lean 1 9 ['SnirBroshi', 'eric-wieser', 'github-actions'] nobody
6-1895
6 days ago
6-16861
6 days ago
7-41907
7 days
33121 SnirBroshi
author:SnirBroshi
 feat(Combinatorics/SimpleGraph/Hasse): paths in a graph are isomorphic to path graphs --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-combinatorics 43/1 Mathlib/Combinatorics/SimpleGraph/Hasse.lean 1 23 ['MrQubo', 'SnirBroshi', 'erdOne', 'github-actions', 'jcommelin', 'mitchell-horner'] b-mehta
assignee:b-mehta
6-1157
6 days ago
24-15656
24 days ago
82-82927
82 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'` --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-logic 161/136 Mathlib.lean,Mathlib/Algebra/Category/Grp/FilteredColimits.lean,Mathlib/Algebra/Category/ModuleCat/FilteredColimits.lean,Mathlib/Algebra/Category/MonCat/FilteredColimits.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/Data/PFunctor/Multivariate/M.lean,Mathlib/Data/Quot.lean,Mathlib/FieldTheory/PerfectClosure.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 25 15 ['SnirBroshi', 'github-actions', 'mathlib-merge-conflicts', 'mathlib4-merge-conflict-bot', 'thorimur', 'vihdzp'] thorimur
assignee:thorimur
6-795
6 days ago
6-822
6 days ago
52-25203
52 days
35435 WenrongZou
author:WenrongZou
 feat(RingTheory/MvPowerSeries): toMvPowerSeries and rename --- Some APIs about `rename` and `toMvPowerSeries`. This follows the inspiration in `Polynomial.toMvPolynomial` and `MvPolynomial.rename`. I will add more theorems related to these in the next PR. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-ring-theory merge-conflict 325/4 Mathlib.lean,Mathlib/RingTheory/MvPowerSeries/Rename.lean,Mathlib/RingTheory/MvPowerSeries/Substitution.lean,Mathlib/RingTheory/PowerSeries/Substitution.lean 4 7 ['BryceT233', 'WenrongZou', 'github-actions', 'mariainesdff', 'mathlib-merge-conflicts'] mariainesdff
assignee:mariainesdff
6-344
6 days ago
27-80187
27 days ago
27-80575
27 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
6-342
6 days ago
18-32587
18 days ago
2-47211
2 days
35738 GrigorenkoPV
author:GrigorenkoPV
 perf: remove some `aesop`s and `grind`s --- Based on top of #35696. 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
6-341
6 days ago
19-68421
19 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 merge-conflict 527/0 Mathlib.lean,Mathlib/Data/Set/Accumulate.lean,Mathlib/Data/Set/Dissipate.lean,Mathlib/MeasureTheory/PiSystem.lean,Mathlib/Topology/Compactness/CompactSystem.lean 5 3 ['github-actions', 'mathlib-dependent-issues', 'mathlib-merge-conflicts'] nobody
6-337
6 days ago
12-50489
12 days ago
0-4550
1 hour
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 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
6-336
6 days ago
12-22841
12 days ago
0-1847
30 minutes
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. --- - [ ] depends on: #36013 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) brownian merge-conflict 313/0 Mathlib.lean,Mathlib/Data/Set/Accumulate.lean,Mathlib/Data/Set/Dissipate.lean,Mathlib/MeasureTheory/PiSystem.lean,Mathlib/Topology/Compactness/CompactSystem.lean 5 3 ['github-actions', 'mathlib-dependent-issues', 'mathlib-merge-conflicts'] nobody
6-332
6 days ago
11-29345
11 days ago
11-29300
11 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 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 1 ['github-actions'] nobody
5-82881
5 days ago
24-29628
24 days ago
0-114
1 minute
26735 Raph-DG
author:Raph-DG
 feat(AlgebraicGeometry): The codimension of a point of a scheme is equal to the krull dimension of the stalk In this PR we show that the codimension of a point in a scheme is equal to the krull dimension of the local ring at that point, as in stacks 02IZ. --- The proof of the main result `stalk_dim_eq_coheight` is currently a bit long for my (and I suspect the broader community's) tastes. That said, I'm not quite sure the best way to break it into pieces, any comments would be very much appreciated! - [x] depends on: #26204 [For the notion of codimension, here we are using the coheight in the specialization order. ] - [x] depends on: #26225 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebraic-geometry awaiting-author 154/0 Mathlib/AlgebraicGeometry/Properties.lean,Mathlib/Order/KrullDimension.lean,Mathlib/Topology/KrullDimension.lean,Mathlib/Topology/Sets/Closeds.lean 4 61 ['Raph-DG', 'chrisflav', 'erdOne', 'github-actions', 'leanprover-community-bot-assistant', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot', 'tb65536'] erdOne
assignee:erdOne
5-70535
5 days ago
9-42889
9 days ago
45-60302
45 days
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 1172/8 Mathlib.lean,Mathlib/Algebra/Category/ModuleCat/Baer.lean,Mathlib/Algebra/Category/ModuleCat/Ext/Ulift.lean,Mathlib/Algebra/Category/ModuleCat/InjectiveDimension.lean,Mathlib/Algebra/Homology/DerivedCategory/Basic.lean,Mathlib/Algebra/Homology/DerivedCategory/Ext/Bijection.lean,Mathlib/Algebra/Homology/DerivedCategory/Ext/Map.lean,Mathlib/Algebra/Homology/DerivedCategory/ShortExact.lean,Mathlib/Algebra/Homology/HomologicalComplexAbelian.lean,Mathlib/Algebra/Homology/HomotopyCategory/ShortExact.lean,Mathlib/Algebra/Homology/ShortComplex/ModuleCat.lean,Mathlib/RingTheory/Gorenstein/Defs.lean,Mathlib/RingTheory/Gorenstein/Localization.lean,Mathlib/RingTheory/LocalProperties/InjectiveDimension.lean 14 8 ['github-actions', 'mathlib-merge-conflicts', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
5-70168
5 days ago
112-78697
112 days ago
0-862
14 minutes
36287 ScottCarnahan
author:ScottCarnahan
 feat(Algebra/Lie): add graded Lie ring class This PR adds graded bracket and graded Lie ring classes. It is a first step toward Lie algebras graded by additive commutative monoids. The design is mostly copied from the graded ring API, but with Props enforcing additivity of degree. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra
label:t-algebra$
 181/0 Mathlib.lean,Mathlib/Algebra/DirectSum/Basic.lean,Mathlib/Algebra/Lie/Graded.lean 3 2 ['github-actions'] ocfnash
assignee:ocfnash
5-68692
5 days ago
10-43957
10 days ago
10-43912
10 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 36 ['JovanGerb', 'fpvandoorn', 'github-actions', 'grunweg', 'mathlib-dependent-issues', 'mathlib-merge-conflicts'] nobody
5-64020
5 days ago
34-52430
34 days ago
0-15928
4 hours
36330 urkud
author:urkud
 feat(UpperHalfPlane): define PGL action on the upper half-plane --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) awaiting-author t-analysis 285/5 Mathlib.lean,Mathlib/Analysis/Complex/UpperHalfPlane/FixedPoints.lean,Mathlib/Analysis/Complex/UpperHalfPlane/MoebiusAction.lean,Mathlib/LinearAlgebra/Matrix/GeneralLinearGroup/FinTwo.lean,Mathlib/LinearAlgebra/Matrix/GeneralLinearGroup/Projective.lean 5 23 ['github-actions', 'loefflerd', 'urkud'] nobody
5-58955
5 days ago
9-40576
9 days ago
9-40795
9 days
36474 SmwYin
author:SmwYin
 feat(NumberTheory/ModularForms/QExpansion): update qExpansion API for more general objects This PR generalises several lemmas from the `ModularFormClass` setting to functions on the upper half plane that are periodic, holomorphic, and bounded at infinity. This allows us to discuss the q-expansion of functions such as `q * j`, where `j` is the j-function. The specialised `ModularFormClass` lemmas are kept as wrappers. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-number-theory new-contributor 224/137 Mathlib/NumberTheory/ModularForms/LevelOne.lean,Mathlib/NumberTheory/ModularForms/QExpansion.lean 2 11 ['CBirkbeck', 'SmwYin', 'github-actions', 'mathlib-bors'] nobody
5-57382
5 days ago
unknown
0-0
0 seconds
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 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 22 ['github-actions', 'mariainesdff', 'mathlib4-merge-conflict-bot'] mariainesdff
assignee:mariainesdff
5-55186
5 days ago
11-45668
11 days ago
28-31300
28 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
5-53991
5 days ago
unknown
0-0
0 seconds
36487 samueloettl
author:samueloettl
 feat(Dynamics): Ergodicity characterization --- - [] depends on: #35402 - [] depends on: #35451 This is a work in progress for a characterization of ergodicity via a Birkhoff Average. Coarse Feedback is encouraged. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) WIP new-contributor large-import 421/1 Mathlib/Dynamics/Ergodic/Function.lean,Mathlib/Dynamics/Ergodic/OnAverageIndependent.lean,Mathlib/Topology/MetricSpace/Pseudo/Basic.lean 3 2 ['github-actions'] nobody
5-51579
5 days ago
5-51598
5 days ago
0-163
2 minutes
36478 TJHeeringa
author:TJHeeringa
 feat(Analysis/Matrix): Added Schur's product Added Schur's product, i.e. the Hadamard product of two finite positive semi-definite matrices is again a positive semi-definite matrix. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-analysis new-contributor awaiting-author 28/0 Mathlib/Analysis/Matrix/Order.lean 1 11 ['github-actions', 'j-loreaux', 'themathqueen'] nobody
5-51265
5 days ago
5-61475
5 days ago
5-61430
5 days
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 blocked-by-other-PR merge-conflict 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/Algebra/Valued/ValuationTopology.lean,Mathlib/Topology/MetricSpace/Algebra.lean,Mathlib/Topology/MetricSpace/BundledFun.lean,Mathlib/Topology/MetricSpace/Infsep.lean,Mathlib/Topology/Semicontinuity/Basic.lean 44 3 ['github-actions', 'mathlib-dependent-issues', 'mathlib-merge-conflicts'] nobody
5-51053
5 days ago
16-84581
16 days ago
0-478
7 minutes
35802 xroblot
author:xroblot
 feat(RamificationInertia): splitting in the decomposition field --- - [ ] 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/) blocked-by-other-PR t-number-theory large-import 279/4 Mathlib/NumberTheory/RamificationInertia/Basic.lean,Mathlib/NumberTheory/RamificationInertia/HilbertTheory.lean,Mathlib/RingTheory/FiniteType.lean,Mathlib/RingTheory/Finiteness/Basic.lean 4 4 ['github-actions', 'joneugster', 'mathlib-dependent-issues', 'mathlib-merge-conflicts'] nobody
5-50566
5 days ago
18-74491
18 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
5-39487
5 days ago
25-78414
25 days ago
0-19
19 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) 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 2 ['github-actions'] nobody
5-38287
5 days ago
5-37470
5 days ago
0-1127
18 minutes
36494 MichaelStollBayreuth
author:MichaelStollBayreuth
 feat(GroupTheory/IndexNSmul): new file This PR adds a new file (to be able to have the required imports) that contains some results related to the (relative) index of subgroups in commutative additive groups and the multiplication-by-`n` map. They will be useful in proving the Northcott property for heights on number fields. --- - [ ] depends on: #36458 [some API lemmas for powMonoidHom] [![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$
 167/2 Mathlib.lean,Mathlib/Algebra/Group/Subgroup/Ker.lean,Mathlib/Algebra/Group/Subgroup/ZPowers/Lemmas.lean,Mathlib/GroupTheory/IndexNSmul.lean,Mathlib/GroupTheory/QuotientGroup/Basic.lean 5 2 ['github-actions', 'mathlib-dependent-issues'] nobody
5-36846
5 days ago
5-38643
5 days ago
0-415
6 minutes
26160 oliver-butterley
author:oliver-butterley
 feat(MeasureTheory.VectorMeasure): add several lemmas which characterize variation Add the following lemmas concerning variation of a VectorMeasure: * `norm_measure_le_variation`: `‖μ E‖ₑ ≤ variation μ E`. * `variation_neg`: `(-μ).variation = μ.variation`. * `variation_zero`: `(0 : VectorMeasure X V).variation = 0`. * `absolutelyContinuous` Co-authored-by: @yoh-tanimoto - [x] depends on: #26156 --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor t-measure-probability awaiting-author 340/20 Mathlib.lean,Mathlib/Data/Finset/Basic.lean,Mathlib/MeasureTheory/Measure/MeasureSpaceDef.lean,Mathlib/MeasureTheory/Measure/PreVariation.lean,Mathlib/MeasureTheory/OuterMeasure/Induced.lean,Mathlib/MeasureTheory/VectorMeasure/Variation/Basic.lean,Mathlib/MeasureTheory/VectorMeasure/Variation/Defs.lean,Mathlib/Order/Partition/Finpartition.lean 8 30 ['EtienneC30', 'github-actions', 'mathlib-dependent-issues', 'mathlib-merge-conflicts', 'mathlib4-merge-conflict-bot', 'sgouezel', 'yoh-tanimoto'] nobody
5-34350
5 days ago
5-66624
5 days ago
42-19432
42 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
5-29519
5 days ago
unknown
0-0
0 seconds
35991 xroblot
author:xroblot
 feat(RamificationInertia): decomposition field and inertia field of compositum --- - [ ] depends on: #35808 - [ ] depends on: #35493 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) large-import blocked-by-other-PR merge-conflict 645/36 Mathlib/Algebra/Group/Subgroup/Basic.lean,Mathlib/FieldTheory/Galois/Basic.lean,Mathlib/FieldTheory/Galois/IsGaloisGroup.lean,Mathlib/FieldTheory/IntermediateField/Algebraic.lean,Mathlib/NumberTheory/NumberField/Cyclotomic/Ideal.lean,Mathlib/NumberTheory/RamificationInertia/Basic.lean,Mathlib/NumberTheory/RamificationInertia/Galois.lean,Mathlib/NumberTheory/RamificationInertia/HilbertTheory.lean,Mathlib/RingTheory/Localization/AtPrime/Extension.lean 9 5 ['github-actions', 'mathlib-dependent-issues', 'mathlib-merge-conflicts'] nobody
5-28916
5 days ago
14-48317
14 days ago
0-316
5 minutes
36497 eric-wieser
author:eric-wieser
 feat: add missing rfl lemmas for WriterT.run The `FreeM` example in CSLib that demonstrates an alternate construction of `WriterT` suffers from this API being absent, and results to agressively unfolding everything. This also adds some missing `.run`s to fix defeq abuse. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-data 68/16 Mathlib/Control/Monad/Writer.lean 1 1 ['github-actions'] nobody
5-28754
5 days ago
5-28823
5 days ago
5-28875
5 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
5-23624
5 days ago
5-23350
5 days ago
0-364
6 minutes
36505 eric-wieser
author:eric-wieser
 fix: use `MonadExceptOf` instead of `MonadExcept` for `ContT` and `WriterT` This matches how `ReaderT` and `StateT` do this in core. Also adds some missing `rfl` lemmas, and fixes a stray `id` that should be `Id`. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-data 25/4 Mathlib/Control/Monad/Cont.lean,Mathlib/Control/Monad/Writer.lean 2 1 ['github-actions'] nobody
5-20271
5 days ago
5-22748
5 days ago
5-22703
5 days
36169 SnirBroshi
author:SnirBroshi
 feat(Order/ConditionallyCompleteLattice/Indexed): `iSup` of `sup`s vs `sup` of `iSup`s `ciSup_sup_eq`/`ciInf_inf_eq` match `CompleteLattice`'s `iSup_sup_eq`/`iInf_inf_eq`, and in a `ConditionallyCompleteLinearOrder` we get an inequality without any bounded assumptions. `Finset.ciSup_union'` for `ConditionallyCompleteLinearOrderBot` matches `CompleteLattice`'s `Finset.iSup_union`. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-order 39/0 Mathlib/Order/ConditionallyCompleteLattice/Finset.lean,Mathlib/Order/ConditionallyCompleteLattice/Indexed.lean 2 1 ['github-actions'] Vierkantor
assignee:Vierkantor
5-18796
5 days ago
12-372
12 days ago
12-2042
12 days
36174 mike1729
author:mike1729
 feat(Topology/Compactness): add countably compact sets This PR introduces the theory of countably compact sets and spaces. The motivation was the Eberlein–Šmulian theorem but of course this theory is of its own interest and there are many more applications. New definitions: - `IsCountablyCompact A`: a set `A` is countably compact if every sequence in `A` has a cluster point in `A`. - `CountablyCompactSpace E`: the whole space `E` is countably compact. Main results: - `IsCountablyCompact.elim_finite_subcover`: finite subcover from any countable open cover. - `isCountablyCompact_iff_countable_open_cover`: equivalence with the finite-subcover property. - `IsCompact.IsCountablyCompact`: compact implies countably compact. - `IsSeqCompact.IsCountablyCompact`: sequentially compact implies countably compact. - `IsCountablyCompact.isSeqCompact`: countably compact implies sequentially compact in a first-countable space. - `isCountablyCompact_iff_infinite_subset_has_accPt`: Bolzano–Weierstrass characterisation in a T₁ space. - `IsLindelof.isCompact`: a countably compact Lindelöf set is compact. - `IsCountablyCompact.image`: continuous images of countably compact sets are countably compact. - Union stability: binary, `Finset`, `Set.Finite`, and `iUnion` variants. Co-authored-by: Yongxi Lin @CoolRmal --- This PR adds `Mathlib.Topology.Compactness.CountablyCompact`, a new file alongside the existing `Compact`, `SeqCompact`, and `Lindelof` files. The primary definition follows Engelking's *General Topology* (the cluster-point characterisation for sequences), and the equivalence with the finite-subcover characterisation is established immediately. The immediate motivation for this PR is #35473 (Eberlein–Šmulian theorem), which depends on it. Further PRs will extend the theory of countably compact spaces. --> [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor t-topology 299/0 Mathlib.lean,Mathlib/Topology/ClusterPt.lean,Mathlib/Topology/Compactness/CountablyCompact.lean 3 4 ['github-actions', 'mike1729', 'plp127'] j-loreaux
assignee:j-loreaux
5-18795
5 days ago
11-74813
11 days ago
11-74768
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/) 6/2 Mathlib/Algebra/Algebra/Hom.lean,Mathlib/RingTheory/Etale/StandardEtale.lean 2 2 ['acmepjz', 'github-actions'] dupuisf
assignee:dupuisf
5-18791
5 days ago
9-9256
9 days ago
9-9211
9 days
36349 SnirBroshi
author:SnirBroshi
 feat(LinearAlgebra/Matrix): expand `IsSymm`/`IsHermitian` API --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra
label:t-algebra$
 156/14 Mathlib/Data/Matrix/Composition.lean,Mathlib/LinearAlgebra/Matrix/ConjTranspose.lean,Mathlib/LinearAlgebra/Matrix/Defs.lean,Mathlib/LinearAlgebra/Matrix/Hermitian.lean,Mathlib/LinearAlgebra/Matrix/Swap.lean,Mathlib/LinearAlgebra/Matrix/Symmetric.lean 6 10 ['SnirBroshi', 'github-actions', 'themathqueen'] joelriou
assignee:joelriou
5-18791
5 days ago
8-79561
8 days ago
8-80968
8 days
36507 BryceT233
author:BryceT233
 feat(RingTheory/MvPowerSeries): introduces various equivalences for `MvPowerSeries` This PR introduces 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/) - [ ] depends on: #35329 - [ ] depends on: #36506 t-ring-theory blocked-by-other-PR 634/0 Mathlib.lean,Mathlib/RingTheory/MvPowerSeries/Equiv.lean 2 2 ['github-actions', 'mathlib-dependent-issues'] nobody
5-16795
5 days ago
5-18660
5 days ago
0-149
2 minutes
35906 scp020
author:scp020
 feat(Combinatorics/SimpleGraph/Walks): add Walk.IsChord and Walk.IsChordless Add `Walk.IsChord` and `Walk.IsChordless` predicates in a new file `SimpleGraph/Walks/Chords.lean`. See "chord" in https://en.wikipedia.org/wiki/Glossary_of_graph_theory Discussion on Zulip: [Zulip link](https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/Walk.2EIsChordless.20live.20in.20mathlib.3F/with/575277309) authored-by: Tianyi Zhao --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-combinatorics new-contributor 68/0 Mathlib.lean,Mathlib/Combinatorics/SimpleGraph/Walks/Chords.lean 2 11 ['SnirBroshi', 'github-actions', 'scp020'] nobody
5-12981
5 days ago
13-15863
13 days ago
14-66569
14 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
5-10900
5 days ago
27-33965
27 days ago
9-52768
9 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 127/0 Mathlib/Combinatorics/SimpleGraph/DegreeSum.lean,Mathlib/Combinatorics/SimpleGraph/Matching.lean 2 30 ['SnirBroshi', 'SproutSeeds', 'github-actions', 'jcommelin', 'ksenono'] awainverse
assignee:awainverse
5-9286
5 days ago
41-27269
41 days ago
93-86353
93 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
5-5022
5 days ago
581-51861
581 days ago
31-44440
31 days
35852 Thmoas-Guan
author:Thmoas-Guan
 feat(RingTheory): existence of coefficient ring 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 --- - [ ] depends on: #28683 - [ ] depends on: #35675 - [ ] depends on: #36102 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) blocked-by-other-PR large-import 2098/81 Mathlib.lean,Mathlib/Algebra/Module/SpanRank.lean,Mathlib/Algebra/Module/Torsion/Basic.lean,Mathlib/LinearAlgebra/Span/Basic.lean,Mathlib/RingTheory/AdicCompletion/LocalRing.lean,Mathlib/RingTheory/AdicCompletion/Noetherian.lean,Mathlib/RingTheory/CohenStructureTheorem.lean,Mathlib/RingTheory/Flat/Extension.lean,Mathlib/RingTheory/Ideal/Cotangent.lean,Mathlib/RingTheory/Ideal/KrullsHeightTheorem.lean,Mathlib/RingTheory/KrullDimension/Regular.lean,Mathlib/RingTheory/RegularLocalRing/Basic.lean,Mathlib/RingTheory/RegularLocalRing/Defs.lean,Mathlib/RingTheory/RingHom/Smooth.lean,Mathlib/RingTheory/Smooth/Quotient.lean,Mathlib/RingTheory/TensorProduct/Quotient.lean 16 4 ['github-actions', 'mathlib-bors', 'mathlib-dependent-issues', 'mathlib-merge-conflicts'] nobody
5-4842
5 days ago
17-77409
17 days ago
0-10
10 seconds
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
4-74859
4 days ago
59-83718
59 days ago
10-65787
10 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 awaiting-author 199/0 Mathlib.lean,Mathlib/Combinatorics/SimpleGraph/Connectivity/VertexConnectivity.lean,Mathlib/Combinatorics/SimpleGraph/IsolateVerts.lean 3 138 ['0xTerencePrime', 'SnirBroshi', 'SproutSeeds', 'YaelDillies', 'github-actions', 'vihdzp'] YaelDillies
assignee:YaelDillies
4-74453
4 days ago
19-12103
19 days ago
40-44712
40 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
4-74315
4 days ago
784-45803
784 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
4-74282
4 days ago
768-57723
768 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/) 24/29 Mathlib/Data/Nat/Init.lean,Mathlib/Logic/Equiv/Fin/Basic.lean 2 2 ['JovanGerb', 'github-actions'] nobody
4-73609
4 days ago
6-8259
6 days ago
0-4657
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 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 23 ['erdOne', 'github-actions', 'grunweg'] grunweg
assignee:grunweg
4-73592
4 days ago
5-27585
5 days ago
0-2953
49 minutes
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 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 4 ['JovanGerb', 'MichaelStollBayreuth', 'Parcly-Taxel', 'github-actions'] nobody
4-72831
4 days ago
12-14337
12 days ago
12-16407
12 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 blocked-by-other-PR 107/1 Mathlib/Probability/Distributions/Poisson/Basic.lean 1 31 ['CoolRmal', 'DavidLedvinka', 'EtienneC30', 'github-actions', 'huaizhangchu', 'mathlib-dependent-issues', 'mathlib-merge-conflicts'] EtienneC30
assignee:EtienneC30
4-69657
4 days ago
9-72247
9 days ago
29-33945
29 days
36166 wwylele
author:wwylele
 feat(Data/Nat): formula for cardinal of finsuppAntidiag on Nat Co-authored-by: Bingyu Xia --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) maintainer-merge 82/0 Mathlib.lean,Mathlib/Algebra/Order/Antidiag/FinsuppEquiv.lean 2 16 ['BryceT233', 'copilot-pull-request-reviewer', 'github-actions', 'tb65536', 'wwylele'] tb65536
assignee:tb65536
4-67188
4 days ago
5-25904
5 days ago
11-2502
11 days
36151 sgouezel
author:sgouezel
 brutal search and replace --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict 1917/1430 Archive/Sensitivity.lean,Archive/Wiedijk100Theorems/Konigsberg.lean,Counterexamples/HeawoodUnitDistance.lean,Counterexamples/HomogeneousPrimeNotPrime.lean,Mathlib.lean,Mathlib/Algebra/Algebra/Subalgebra/Basic.lean,Mathlib/Algebra/Algebra/Subalgebra/Lattice.lean,Mathlib/Algebra/Algebra/ZMod.lean,Mathlib/Algebra/Category/AlgCat/Limits.lean,Mathlib/Algebra/Category/BoolRing.lean,Mathlib/Algebra/Category/CommAlgCat/Basic.lean,Mathlib/Algebra/Category/CommAlgCat/FiniteType.lean,Mathlib/Algebra/Category/CommBialgCat.lean,Mathlib/Algebra/Category/FGModuleCat/Basic.lean,Mathlib/Algebra/Category/FGModuleCat/EssentiallySmall.lean,Mathlib/Algebra/Category/Grp/FiniteGrp.lean,Mathlib/Algebra/Category/Grp/LeftExactFunctor.lean,Mathlib/Algebra/Category/Grp/Limits.lean,Mathlib/Algebra/Category/ModuleCat/ChangeOfRings.lean,Mathlib/Algebra/Category/ModuleCat/ExteriorPower.lean,Mathlib/Algebra/Category/ModuleCat/Limits.lean,Mathlib/Algebra/Category/ModuleCat/Localization.lean,Mathlib/Algebra/Category/ModuleCat/Monoidal/Basic.lean,Mathlib/Algebra/Category/ModuleCat/Presheaf.lean,Mathlib/Algebra/Category/ModuleCat/Presheaf/ChangeOfRings.lean,Mathlib/Algebra/Category/ModuleCat/Presheaf/EpiMono.lean,Mathlib/Algebra/Category/ModuleCat/Presheaf/Monoidal.lean,Mathlib/Algebra/Category/ModuleCat/Presheaf/Sheafification.lean,Mathlib/Algebra/Category/MonCat/Limits.lean,Mathlib/Algebra/Category/Ring/Epi.lean,Mathlib/Algebra/Category/Ring/Limits.lean,Mathlib/Algebra/Colimit/Module.lean,Mathlib/Algebra/DirectSum/Basic.lean,Mathlib/Algebra/DirectSum/Internal.lean,Mathlib/Algebra/EuclideanDomain/Int.lean,Mathlib/Algebra/Field/Subfield/Basic.lean,Mathlib/Algebra/FreeMonoid/Basic.lean,Mathlib/Algebra/GradedMonoid.lean,Mathlib/Algebra/Group/Conj.lean,Mathlib/Algebra/Group/ConjFinite.lean,Mathlib/Algebra/Group/Fin/Basic.lean,Mathlib/Algebra/Group/Subgroup/Actions.lean,Mathlib/Algebra/Group/Submonoid/Membership.lean,Mathlib/Algebra/Homology/BifunctorAssociator.lean,Mathlib/Algebra/Homology/DerivedCategory/Basic.lean,Mathlib/Algebra/Homology/DerivedCategory/ExactFunctor.lean,Mathlib/Algebra/Homology/DerivedCategory/Linear.lean,Mathlib/Algebra/Homology/Embedding/CochainComplex.lean,Mathlib/Algebra/Homology/Embedding/TruncLE.lean,Mathlib/Algebra/Homology/Embedding/TruncLEHomology.lean,Mathlib/Algebra/Homology/HasNoLoop.lean,Mathlib/Algebra/Homology/HomotopyCategory/HomComplexCohomology.lean,Mathlib/Algebra/Homology/HomotopyCategory/SingleFunctors.lean,Mathlib/Algebra/Homology/Monoidal.lean,Mathlib/Algebra/Lie/Abelian.lean,Mathlib/Algebra/Lie/LieTheorem.lean,Mathlib/Algebra/Lie/Quotient.lean,Mathlib/Algebra/Lie/Solvable.lean,Mathlib/Algebra/Lie/Submodule.lean,Mathlib/Algebra/Module/CharacterModule.lean,Mathlib/Algebra/Module/Congruence/Defs.lean,Mathlib/Algebra/Module/LinearMap/Defs.lean,Mathlib/Algebra/Module/LocalizedModule/Basic.lean,Mathlib/Algebra/Module/LocalizedModule/Submodule.lean,Mathlib/Algebra/Module/PUnit.lean,Mathlib/Algebra/Module/Presentation/Finite.lean,Mathlib/Algebra/Module/Torsion/Basic.lean,Mathlib/Algebra/Module/ZLattice/Basic.lean,Mathlib/Algebra/Module/ZLattice/Summable.lean,Mathlib/Algebra/MonoidAlgebra/Defs.lean,Mathlib/Algebra/MvPolynomial/Basic.lean,Mathlib/Algebra/MvPolynomial/Nilpotent.lean,Mathlib/Algebra/Order/Archimedean/Class.lean,Mathlib/Algebra/Order/Group/Synonym.lean,Mathlib/Algebra/Order/GroupWithZero/Canonical.lean,Mathlib/Algebra/Order/Ring/StandardPart.lean,Mathlib/Algebra/Polynomial/Degree/TrailingDegree.lean,Mathlib/Algebra/Polynomial/Module/AEval.lean,Mathlib/Algebra/Polynomial/Module/Basic.lean,Mathlib/Algebra/Quaternion.lean,Mathlib/Algebra/Ring/Action/Subobjects.lean,Mathlib/Algebra/Ring/Defs.lean,Mathlib/Algebra/Ring/Prod.lean,Mathlib/Algebra/Ring/Subring/Basic.lean,Mathlib/Algebra/Ring/Subsemiring/Basic.lean,Mathlib/Algebra/Star/Prod.lean,Mathlib/Algebra/Star/StarAlgHom.lean,Mathlib/Algebra/Star/Unitary.lean,Mathlib/AlgebraicGeometry/AffineScheme.lean,Mathlib/AlgebraicGeometry/AffineSpace.lean,Mathlib/AlgebraicGeometry/AffineTransitionLimit.lean,Mathlib/AlgebraicGeometry/Artinian.lean,Mathlib/AlgebraicGeometry/Cover/Directed.lean,Mathlib/AlgebraicGeometry/Cover/Over.lean,Mathlib/AlgebraicGeometry/Cover/Sigma.lean,Mathlib/AlgebraicGeometry/Gluing.lean,Mathlib/AlgebraicGeometry/Group/Abelian.lean,Mathlib/AlgebraicGeometry/IdealSheaf/Basic.lean,Mathlib/AlgebraicGeometry/IdealSheaf/IrreducibleComponent.lean,Mathlib/AlgebraicGeometry/Limits.lean 570 0 [] nobody
4-65037
4 days ago
11-34407
11 days ago
0-89
1 minute
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 4986/36 Mathlib.lean,Mathlib/Algebra/Category/ModuleCat/Baer.lean,Mathlib/Algebra/Category/ModuleCat/Ext/BaseChange.lean,Mathlib/Algebra/Category/ModuleCat/Ext/Ulift.lean,Mathlib/Algebra/Category/ModuleCat/InjectiveDimension.lean,Mathlib/Algebra/Homology/DerivedCategory/Basic.lean,Mathlib/Algebra/Homology/DerivedCategory/Ext/Bijection.lean,Mathlib/Algebra/Homology/DerivedCategory/Ext/Map.lean,Mathlib/Algebra/Homology/DerivedCategory/ShortExact.lean,Mathlib/Algebra/Homology/HomologicalComplexAbelian.lean,Mathlib/Algebra/Homology/HomotopyCategory/ShortExact.lean,Mathlib/Algebra/Homology/ShortComplex/ModuleCat.lean,Mathlib/Algebra/Module/FinitePresentation.lean,Mathlib/CategoryTheory/Abelian/Injective/Dimension.lean,Mathlib/CategoryTheory/Abelian/Projective/Dimension.lean,Mathlib/RingTheory/CohenMacaulay/Basic.lean,Mathlib/RingTheory/Flat/IsBaseChange.lean,Mathlib/RingTheory/Gorenstein/CohenMacaulay.lean,Mathlib/RingTheory/Gorenstein/Defs.lean,Mathlib/RingTheory/Ideal/Operations.lean,Mathlib/RingTheory/Ideal/Quotient/Operations.lean,Mathlib/RingTheory/Regular/Category.lean,Mathlib/RingTheory/Regular/Depth.lean,Mathlib/RingTheory/Regular/InjectiveDimension.lean,Mathlib/RingTheory/Regular/Ischebeck.lean,Mathlib/RingTheory/Regular/ProjectiveDimension.lean,Mathlib/RingTheory/Regular/RegularSequence.lean 27 2 ['github-actions', 'mathlib-dependent-issues'] nobody
4-62779
4 days ago
4-64947
4 days ago
4-64902
4 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 5935/36 Mathlib.lean,Mathlib/Algebra/Category/ModuleCat/Baer.lean,Mathlib/Algebra/Category/ModuleCat/Ext/BaseChange.lean,Mathlib/Algebra/Category/ModuleCat/Ext/Ulift.lean,Mathlib/Algebra/Category/ModuleCat/InjectiveDimension.lean,Mathlib/Algebra/Homology/DerivedCategory/Basic.lean,Mathlib/Algebra/Homology/DerivedCategory/Ext/Bijection.lean,Mathlib/Algebra/Homology/DerivedCategory/Ext/Map.lean,Mathlib/Algebra/Homology/DerivedCategory/ShortExact.lean,Mathlib/Algebra/Homology/HomologicalComplexAbelian.lean,Mathlib/Algebra/Homology/HomotopyCategory/ShortExact.lean,Mathlib/Algebra/Homology/ShortComplex/ModuleCat.lean,Mathlib/Algebra/Module/FinitePresentation.lean,Mathlib/CategoryTheory/Abelian/Injective/Dimension.lean,Mathlib/CategoryTheory/Abelian/Projective/Dimension.lean,Mathlib/RingTheory/CohenMacaulay/Basic.lean,Mathlib/RingTheory/CohenMacaulay/Catenary.lean,Mathlib/RingTheory/Flat/IsBaseChange.lean,Mathlib/RingTheory/Gorenstein/CohenMacaulay.lean,Mathlib/RingTheory/Gorenstein/Defs.lean,Mathlib/RingTheory/Ideal/Operations.lean,Mathlib/RingTheory/Ideal/Quotient/Operations.lean,Mathlib/RingTheory/Regular/Category.lean,Mathlib/RingTheory/Regular/Depth.lean,Mathlib/RingTheory/Regular/InjectiveDimension.lean,Mathlib/RingTheory/Regular/Ischebeck.lean,Mathlib/RingTheory/Regular/ProjectiveDimension.lean,Mathlib/RingTheory/Regular/RegularSequence.lean 28 6 ['github-actions', 'mathlib-merge-conflicts', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
4-62608
4 days ago
77-58122
77 days ago
0-126
2 minutes
36335 SnirBroshi
author:SnirBroshi
 feat(Combinatorics/SimpleGraph/LapMatrix): {`adjMatrix`/`degMatrix`/`lapMatrix`} are Hermitian Also a small cleanup and golf. This should let us access the eigenvalues of these matrices, for spectral graph theory. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-combinatorics 33/19 Mathlib/Combinatorics/SimpleGraph/AdjMatrix.lean,Mathlib/Combinatorics/SimpleGraph/LapMatrix.lean 2 2 ['github-actions', 'themathqueen'] nobody
4-59060
4 days ago
4-61562
4 days ago
8-78402
8 days
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
4-58898
4 days ago
4-58899
4 days ago
0-1252
20 minutes
34742 Brian-Nugent
author:Brian-Nugent
 feat(SheafCohomology): add API for Sheaf Cohomology Defines the long exact sequence on cohomology associated to a short exact sequence of sheaves `H.longSequence`. Also defines `H.equiv₀`, the additive equivalence between `H F 0` and `((sheafSections J AddCommGrpCat).obj (op T)).obj F` when the category has a terminal object `T`. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor large-import t-category-theory 98/3 Mathlib/Algebra/Category/Grp/ForgetCorepresentable.lean,Mathlib/CategoryTheory/Sites/Abelian.lean,Mathlib/CategoryTheory/Sites/SheafCohomology/Basic.lean 3 26 ['Brian-Nugent', 'adamtopaz', 'dagurtomas', 'github-actions', 'joelriou', 'joneugster', 'mathlib-merge-conflicts'] adamtopaz
assignee:adamtopaz
4-52093
4 days ago
4-69820
4 days ago
29-58487
29 days
35790 Brian-Nugent
author:Brian-Nugent
 feat(CategoryTheory/Algebra): Flasque Sheaves have vanishing cohomology This is a work in progress. --- - [ ] depends on: #34742 - [ ] depends on: #34267 - [ ] depends on: #35785 [![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 704/3 Mathlib.lean,Mathlib/Algebra/Category/Grp/ForgetCorepresentable.lean,Mathlib/Algebra/Homology/ShortComplex/Exact.lean,Mathlib/CategoryTheory/Sites/Abelian.lean,Mathlib/CategoryTheory/Sites/SheafCohomology/Basic.lean,Mathlib/Topology/Sheaves/AddCommGrpCat.lean,Mathlib/Topology/Sheaves/Flasque.lean,Mathlib/Topology/Sheaves/LocallySurjective.lean,Mathlib/Topology/Sheaves/Sheaf.lean,Mathlib/Topology/Sheaves/SheafCondition/UniqueGluing.lean,Mathlib/Topology/Sheaves/ZeroOutside.lean 11 8 ['Brian-Nugent', 'github-actions', 'mathlib-dependent-issues', 'mathlib-merge-conflicts', 'smorel394'] dagurtomas
assignee:dagurtomas
4-52055
4 days ago
19-18640
19 days ago
0-23
23 seconds
36218 Brian-Nugent
author:Brian-Nugent
 feat: Add exact sequences for Sheaf Cohomology This is a work in progress. --- - [ ] depends on: #34742 [![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 192/3 Mathlib.lean,Mathlib/Algebra/Category/Grp/ForgetCorepresentable.lean,Mathlib/CategoryTheory/Sites/Abelian.lean,Mathlib/CategoryTheory/Sites/SheafCohomology/Basic.lean,Mathlib/CategoryTheory/Sites/SheafCohomology/ExactSequences.lean 5 4 ['github-actions', 'mathlib-dependent-issues', 'mathlib-merge-conflicts'] nobody
4-52016
4 days ago
11-39874
11 days ago
0-32
32 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
label:t-algebra$
 1252/17 Mathlib.lean,Mathlib/Algebra/BigOperators/Finprod.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 13 5 ['github-actions', 'mathlib-merge-conflicts', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
4-51909
4 days ago
179-55577
179 days ago
0-13099
3 hours
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
4-49406
4 days ago
4-53076
4 days ago
0-16
16 seconds
36532 jjdishere
author:jjdishere
 feat(Valued/ValuationTopology): Add and generalize lemmas for `IsValuativeTopology` This is the first one of a series of PRs, with final goal removing the class `Valued` from Mathlib. A `Valued` instance will be replaced by `[ValuativeRel R] [UniformSpace R] [IsValuativeTopogy R] [IsUniformAddGroup R] (v : Valuation R A) [v.Compatible]`. The goal of this PR is to prepare (copy) all basic APIs of `Valued` in terms of `IsValuativeTopology`. Currently in Mathlib, there already exists some lemmas with one variant stated with `Valued` and another variant stated with `IsValuativeTopology`. We would like these APIs to be general enough to accept a valuation `v` with `[v.Compatible]` instead of just using `ValuativeRel.valuation R`. This PR would only prove these lemmas without actually replacing current existing any `Valued` lemma. More about the big refactor plan: 1. Copying APIs that takes `Valued` as input, make it accept input `[ValuativeRel R] [UniformSpace R] [IsValuativeTopogy R] [IsUniformAddGroup R] (v : Valuation R A) [v.Compatible]`. (Starting with this PR.) 2. For every API that introduces a `Valued` instance, copy that API and make it create `[ValuativeRel R]`, `[IsValuativeTopogy R]`, ... instances. For every instances of `Valued` current exists in Mathlib, create instances of `[ValuativeRel R]`, `[IsValuativeTopogy R]`, ... . 3. A big PR deprecating the `Valued` instance using 1 and 2. --- [![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$
 361/160 Mathlib/RingTheory/Valuation/Basic.lean,Mathlib/RingTheory/Valuation/ValuativeRel/Basic.lean,Mathlib/Topology/Algebra/Valued/ValuationTopology.lean,Mathlib/Topology/Algebra/Valued/ValuativeRel.lean 4 0 [] nobody
4-47882
4 days ago
4-60615
4 days ago
0-56
56 seconds
26770 Jun2M
author:Jun2M
 feat(Combinatorics/Graph): subgraph relations on `Graph` This PR creates a new file `Combinatorics/Graph/Subgraph.lean`. In it, the PR introduces a partial order on graphs by subgraph relation, defines relations `IsInducedSubgraph`, `IsSpanningSubgraph` and `IsClosedSubgraph`. Co-authored-by: Peter Nelson --- - [x] depends on: #34783 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-combinatorics maintainer-merge 362/0 Mathlib.lean,Mathlib/Combinatorics/Graph/Subgraph.lean 2 81 ['Jun2M', 'YaelDillies', 'github-actions', 'lauramonk', 'mathlib-dependent-issues', 'mathlib4-merge-conflict-bot'] YaelDillies
assignee:YaelDillies
4-47457
4 days ago
10-46667
10 days ago
169-8271
169 days
35622 SnirBroshi
author:SnirBroshi
 feat(Logic/Function/Basic): `onFun` and `swap` preserve relation properties --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-logic 141/19 Mathlib/Data/DFinsupp/WellFounded.lean,Mathlib/Logic/Function/Basic.lean,Mathlib/Logic/Function/Defs.lean,Mathlib/Order/Defs/Unbundled.lean,Mathlib/Order/OrderIsoNat.lean,Mathlib/Order/RelClasses.lean,Mathlib/Order/WellFounded.lean,Mathlib/Order/WithBot.lean 8 7 ['SnirBroshi', 'github-actions', 'leanprover-radar', 'vihdzp'] nobody
4-44217
4 days ago
11-9210
11 days ago
22-79416
22 days
35905 Jun2M
author:Jun2M
 feat(Combinatorics/Graph): Add definitions for small graphs (noEdge, bouquet, banana) This pull request adds new constructors and supporting lemmas for special types of graphs in the `Mathlib/Combinatorics/Graph/Basic.lean` file. It introduces: * `Graph.noEdge V`: The graph with vertex set V and empty edge set. * `Graph.bouquet v E`: The graph with vertex set {v} and edge set E, where all edges are loops at v. * `Graph.banana u v E`: The graph with vertex set {u, v} and edge set E, where all edges connect u and v. along with various properties and characterizations for these graphs. Co-authored-by: Peter Nelson [apn.uni@gmail.com](mailto:apn.uni@gmail.com) --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-combinatorics 126/0 Mathlib/Combinatorics/Graph/Basic.lean 1 3 ['Jun2M', 'github-actions', 'lauramonk'] nobody
4-42551
4 days ago
16-11394
16 days ago
16-11777
16 days
36522 nielsvoss
author:nielsvoss
 chore(Topology): rename lim -> Filter.lim and limUnder -> Filter.limUnder, and make a lemma protected Add the namespace `Filter` to `lim` and `limUnder`, since the docstring for `lim` suggests that they were never intended to be placed in the namespace. Also make `MeasureTheory.StronglyMeasurable.limUnder` protected, to allow its proof to refer to `Filter.limUnder` as `limUnder`. See discussion here: https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/Rename.20lim.20to.20Filter.2Elim.3F/with/578862980 --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-topology awaiting-zulip 12/8 Mathlib/MeasureTheory/Constructions/Polish/StronglyMeasurable.lean,Mathlib/MeasureTheory/Function/FactorsThrough.lean,Mathlib/Topology/Defs/Filter.lean 3 7 ['github-actions', 'grunweg', 'nielsvoss'] nobody
4-41860
4 days ago
4-74341
4 days ago
0-1564
26 minutes
36395 JovanGerb
author:JovanGerb
 chore: mark `toSubfield`, `toSubmodule`, `toSubring` as `reducible` This PR marks `IntermediateField.toSubfield`, `Subalgebra.toSubring` and `Subalgebra.toSubmodule` as `implicit_reducible`, because these are all used to construct instances on substructures, and hence need to be reducible when unifying type classes. This allows removing at least 100 backwards compatability flags (possibly more because I haven't checked these exhaustively) --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) ready-to-merge 11/115 Mathlib/Algebra/Algebra/Subalgebra/Basic.lean,Mathlib/Algebra/Algebra/Subalgebra/Lattice.lean,Mathlib/FieldTheory/IntermediateField/Adjoin/Basic.lean,Mathlib/FieldTheory/IntermediateField/Basic.lean,Mathlib/FieldTheory/LinearDisjoint.lean,Mathlib/RingTheory/DedekindDomain/LinearDisjoint.lean,Mathlib/RingTheory/Ideal/Quotient/HasFiniteQuotients.lean,Mathlib/RingTheory/LinearDisjoint.lean,Mathlib/RingTheory/TensorProduct/Basic.lean 9 15 ['JovanGerb', 'eric-wieser', 'github-actions', 'kim-em', 'leanprover-radar', 'mathlib-bors', 'riccardobrasca'] nobody
4-41387
4 days ago
5-3658
5 days ago
2-15970
2 days
33842 joelriou
author:joelriou
 feat(Algebra/Homology): spectral sequences This PR concludes a series of 44 PRs which contains two mostly independent developments: 1. The construction of the spectral object attached to objects in a triangulated category `C` equipped with a t-structure; 2. The definition of a category of spectral sequences and the construction of the spectral sequence attached to a spectral object indexed by the extended integers (the integers with +/- infinity) in an abelian category, and this very PR adds the computation of the first page of the spectral sequence. We now have two ways to construct a spectral object in triangulated categories (the spectral object attached to a filtered complex, and the spectral object attached to a t-structure 1.). After applying a homological functor to these spectral objects, we obtain a spectral object in an abelian category, and the construction 2. allows to define spectral sequences. When more results are obtained about derived functors, the hypercohomology spectral sequence and the Grothendieck spectral sequence of composition of derived functors shall follow. The study of the stabilization and convergence of spectral sequences is not yet included (even though all the necessary code appears in #25848). The mathematical material is discussed in https://hal.science/hal-04546712v5 (§5.4.1 and §5.4.4). --- Dependency graph: https://jriou.org/tmp/spectral-sequences.pdf 1. The construction of the spectral object attached to objects in a triangulated category `C` equipped with a t-structure; - [x] depends on: #35370 - [x] depends on: #35369 - [x] depends on: #35368 - [x] depends on: #35367 - [x] depends on: #35364 - [x] depends on: #35363 - [x] depends on: #35362 2. The definition of a category of spectral sequences and the construction of the spectral sequence attached to a spectral object indexed by the extended integers (the integers with +/- infinity) in an abelian category. - [ ] depends on: #36555 - [ ] depends on: #36550 - [ ] depends on: #36182 - [x] depends on: #36153 - [x] depends on: #36032 - [x] depends on: #36030 - [x] depends on: #36029 - [x] depends on: #35378 - [x] depends on: #35361 - [x] depends on: #35359 - [x] depends on: #35356 - [x] depends on: #35375 - [x] depends on: #35374 - [x] depends on: #35355 - [x] depends on: #35372 - [x] depends on: #35357 3. Prerequisites: - [x] depends on: #34372 - [x] depends on: #34368 - [x] depends on: #34366 - [x] depends on: #34359 - [x] depends on: #33875 - [x] depends on: #33876 - [x] depends on: #34373 - [x] depends on: #34358 - [x] depends on: #33874 - [x] depends on: #33877 - [x] depends on: #33879 - [x] depends on: #33880 - [x] depends on: #33881 - [x] depends on: #33437 - [x] depends on: #33883 - [x] depends on: #33886 - [x] depends on: #33887 - [x] depends on: #33888 - [x] depends on: #33890 - [x] depends on: #35373 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) WIP t-category-theory large-import merge-conflict blocked-by-other-PR 3667/4 Mathlib.lean,Mathlib/Algebra/Homology/SpectralObject/Differentials.lean,Mathlib/Algebra/Homology/SpectralObject/EpiMono.lean,Mathlib/Algebra/Homology/SpectralObject/FirstPage.lean,Mathlib/Algebra/Homology/SpectralObject/HasSpectralSequence.lean,Mathlib/Algebra/Homology/SpectralObject/Homology.lean,Mathlib/Algebra/Homology/SpectralObject/Page.lean,Mathlib/Algebra/Homology/SpectralObject/SpectralSequence.lean,Mathlib/CategoryTheory/Triangulated/TStructure/ETrunc.lean,Mathlib/CategoryTheory/Triangulated/TStructure/Induced.lean,Mathlib/CategoryTheory/Triangulated/TStructure/SpectralObject.lean,Mathlib/CategoryTheory/Triangulated/TStructure/TruncLTGE.lean 12 9 ['github-actions', 'mathlib-dependent-issues', 'mathlib-merge-conflicts', 'mathlib4-merge-conflict-bot'] nobody
4-36139
4 days ago
64-52529
64 days ago
0-1
1 second
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 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: some API issues need to be decided, some slow proofs need to be diagnosed, some documentation needs to be improved, and may adjust variable names/ theorem names/notation. - [x] depends on: #36279 - [x] depends on: #34263 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) WIP t-differential-geometry 317/5 Mathlib.lean,Mathlib/Geometry/Manifold/MFDeriv/SpecificFunctions.lean,Mathlib/Geometry/Manifold/VectorBundle/CovariantDerivative/Metric.lean,Mathlib/Geometry/Manifold/VectorField/LieBracket.lean 4 4 ['github-actions', 'grunweg', 'mathlib-dependent-issues', 'mathlib-merge-conflicts'] nobody
4-36009
4 days ago
10-28343
10 days ago
0-10
10 seconds
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 228/0 Mathlib.lean,Mathlib/CategoryTheory/EquivalenceRelation.lean,Mathlib/CategoryTheory/Limits/Shapes/RegularMono.lean 3 1 ['github-actions'] b-mehta
assignee:b-mehta
4-34028
4 days ago
4-34096
4 days ago
4-35579
4 days
36104 LarsenClose
author:LarsenClose
 feat(CategoryTheory/Endofunctor/Algebra): add Adámek's initial algebra theorem Adds Adámek's initial algebra theorem for endofunctors on categories with an initial object. Given `F : C ⥤ C` where `C` has an initial object, if the initial chain `⊥ → F(⊥) → F²(⊥) → ⋯` has a colimit preserved by `F`, then `F` has an initial algebra whose structure map is an isomorphism. New files: - `InitialChain.lean`: defines `iterateObj F n`, `iterateMap F n`, and `initialChain F : ℕ ⥤ C` via `Functor.ofSequence`. - `ChainShift.lean`: constructs `shiftCocone` and `extendCocone`, proves `shiftCoconeIsColimit` (shifted cocone inherits colimit). - `Adamek.lean`: main result. Constructs the initial `F`-algebra `adamek F c hc` and proves `adamek_isInitial`. Convenience API: `adamekFromInitial`, `adamekStructureIso`, `adamekFixedPoint`. 0 sorry. References Adámek 1974. --- t-category-theory new-contributor 505/0 Mathlib.lean,Mathlib/CategoryTheory/Endofunctor/Algebra/Adamek.lean,Mathlib/CategoryTheory/Endofunctor/Algebra/ChainShift.lean,Mathlib/CategoryTheory/Endofunctor/Algebra/InitialChain.lean,docs/references.bib 5 3 ['dagurtomas', 'github-actions'] joelriou
assignee:joelriou
4-34023
4 days ago
12-4337
12 days ago
12-4406
12 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 183/2 Mathlib/Analysis/Convex/Uniform.lean 1 1 ['github-actions'] faenuccio
assignee:faenuccio
4-30932
4 days ago
4-35999
4 days ago
0-20
20 seconds
36163 mcdoll
author:mcdoll
 feat(Analysis/SpecialFunctions): `rpow` is locally integrable Local integrability of real powers. This is only of interest at the origin, where `‖x‖ ^ (-α)` is not bounded. Co-authored-by: Michael Douglas --- From https://github.com/mrdouglasny/OSforGFF and made mathlib ready by me [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) awaiting-author 71/0 Mathlib/Analysis/SpecialFunctions/Pow/Integral.lean,Mathlib/MeasureTheory/Constructions/HaarToSphere.lean 2 4 ['github-actions', 'j-loreaux'] nobody
4-30895
4 days ago
12-22299
12 days ago
12-22254
12 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
4-30087
4 days ago
103-24218
103 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
4-30016
4 days ago
101-52587
101 days ago
2-61446
2 days
35867 edegeltje
author:edegeltje
 feat(CategoryTheory/Topos): Define subobject classifier for sheaf of types This PR defines `Sheaf.classifier J : Classifier (Sheaf J (Type (max u v))`, which is the last ingredient missing to sheaf categories being elementary topoi. adapted from: https://github.com/edegeltje/CwFTT/blob/591d4505390172ae70e1bc97544d293a35cc0b3f/CwFTT/Classifier/Sheaf.lean --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-category-theory maintainer-merge 309/37 Mathlib.lean,Mathlib/CategoryTheory/Limits/Shapes/IsTerminal.lean,Mathlib/CategoryTheory/Limits/Types/Products.lean,Mathlib/CategoryTheory/Sites/Closed.lean,Mathlib/CategoryTheory/Sites/Sheaf.lean,Mathlib/CategoryTheory/Topos/Sheaf.lean 6 68 ['chrisflav', 'dagurtomas', 'edegeltje', 'github-actions', 'joelriou', 'mathlib-merge-conflicts', 'mathlib-splicebot', 'robin-carlier'] chrisflav
assignee:chrisflav
4-28397
4 days ago
4-41645
4 days ago
14-55516
14 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. - [ ] depends on: #34948 - [x] depends on: #34949 - [x] depends on: #34066 - [ ] depends on: #34079 - [ ] depends on: #34677 - [ ] depends on: #34678 - [ ] depends on: #34952 - [ ] 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
4-27575
4 days ago
unknown
0-0
0 seconds
36539 SnirBroshi
author:SnirBroshi
 feat(SetTheory/Ordinal/Basic): the `#s`-th element of `α` is an upper-bound for the set's mex This is a translation of `card_typein_min_le_mk` to be in terms of `α`. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-set-theory 42/5 Mathlib/AlgebraicGeometry/Properties.lean,Mathlib/Data/Set/Basic.lean,Mathlib/SetTheory/Ordinal/Basic.lean 3 8 ['SnirBroshi', 'b-mehta', 'github-actions', 'vihdzp'] nobody
4-27030
4 days ago
4-27094
4 days ago
4-33657
4 days
26304 Raph-DG
author:Raph-DG
 feat(AlgebraicGeometry): Definition of algebraic cycles In this PR we define algebraic cycles on a scheme X to be functions from the points of X to the integers with locally finite support. We introduce some API for this including grading by height in the specialization order, and a definition of the pushforward. - [ ] depends on: #26225 - [ ] depends on: #26259 - [ ] depends on: #35807 --- Note there are a couple of things I'm not quite sure about which I've mentioned in the comments, like how I'm not sure how to make the proof of map_locally finite more manageable and so on. Any comment on these (or anything else!) would be greatly appreciated. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebraic-geometry RFC awaiting-author merge-conflict 399/22 Mathlib.lean,Mathlib/AlgebraicGeometry/AlgebraicCycle.lean,Mathlib/Topology/LocallyFinsupp.lean 3 24 ['Raph-DG', 'chrisflav', 'github-actions', 'joelriou', 'leanprover-community-bot-assistant', 'mathlib-dependent-issues', 'mathlib-merge-conflicts'] joelriou
assignee:joelriou
4-24254
4 days ago
20-35365
20 days ago
4-29518
4 days
35060 dagurtomas
author:dagurtomas
 Typecat refactor --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) WIP merge-conflict 4589/3932 Mathlib/Algebra/Category/AlgCat/Basic.lean,Mathlib/Algebra/Category/AlgCat/Limits.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/CartesianMonoidal.lean,Mathlib/Algebra/Category/Grp/EpiMono.lean,Mathlib/Algebra/Category/Grp/LeftExactFunctor.lean,Mathlib/Algebra/Category/Grp/Limits.lean,Mathlib/Algebra/Category/Grp/Yoneda.lean,Mathlib/Algebra/Category/ModuleCat/Adjunctions.lean,Mathlib/Algebra/Category/ModuleCat/Basic.lean,Mathlib/Algebra/Category/ModuleCat/EpiMono.lean,Mathlib/Algebra/Category/ModuleCat/FilteredColimits.lean,Mathlib/Algebra/Category/ModuleCat/LeftResolution.lean,Mathlib/Algebra/Category/ModuleCat/Limits.lean,Mathlib/Algebra/Category/ModuleCat/Presheaf.lean,Mathlib/Algebra/Category/ModuleCat/Presheaf/EpiMono.lean,Mathlib/Algebra/Category/ModuleCat/Presheaf/Free.lean,Mathlib/Algebra/Category/ModuleCat/Presheaf/Generator.lean,Mathlib/Algebra/Category/ModuleCat/Presheaf/Sheafify.lean,Mathlib/Algebra/Category/ModuleCat/Semi.lean,Mathlib/Algebra/Category/ModuleCat/Sheaf.lean,Mathlib/Algebra/Category/ModuleCat/Sheaf/Free.lean,Mathlib/Algebra/Category/ModuleCat/Sheaf/PullbackFree.lean,Mathlib/Algebra/Category/ModuleCat/Stalk.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/MonCat/Yoneda.lean,Mathlib/Algebra/Category/Ring/Adjunctions.lean,Mathlib/Algebra/Category/Ring/Basic.lean,Mathlib/Algebra/Category/Ring/Constructions.lean,Mathlib/Algebra/Category/Ring/FilteredColimits.lean,Mathlib/Algebra/Category/Ring/Limits.lean,Mathlib/Algebra/Category/Semigrp/Basic.lean,Mathlib/Algebra/Homology/ShortComplex/ConcreteCategory.lean,Mathlib/AlgebraicGeometry/ProjectiveSpectrum/StructureSheaf.lean,Mathlib/AlgebraicGeometry/Scheme.lean,Mathlib/AlgebraicGeometry/StructureSheaf.lean,Mathlib/AlgebraicTopology/ExtraDegeneracy.lean,Mathlib/AlgebraicTopology/Quasicategory/StrictSegal.lean,Mathlib/AlgebraicTopology/SimplexCategory/Basic.lean,Mathlib/AlgebraicTopology/SimplexCategory/Defs.lean,Mathlib/AlgebraicTopology/SimplicialCategory/SimplicialObject.lean,Mathlib/AlgebraicTopology/SimplicialNerve.lean,Mathlib/AlgebraicTopology/SimplicialSet/Basic.lean,Mathlib/AlgebraicTopology/SimplicialSet/Coskeletal.lean,Mathlib/AlgebraicTopology/SimplicialSet/Degenerate.lean,Mathlib/AlgebraicTopology/SimplicialSet/Dimension.lean,Mathlib/AlgebraicTopology/SimplicialSet/Finite.lean,Mathlib/AlgebraicTopology/SimplicialSet/FiniteColimits.lean,Mathlib/AlgebraicTopology/SimplicialSet/HoFunctorMonoidal.lean,Mathlib/AlgebraicTopology/SimplicialSet/HomotopyCat.lean,Mathlib/AlgebraicTopology/SimplicialSet/Horn.lean,Mathlib/AlgebraicTopology/SimplicialSet/Monoidal.lean,Mathlib/AlgebraicTopology/SimplicialSet/Monomorphisms.lean,Mathlib/AlgebraicTopology/SimplicialSet/Nerve.lean,Mathlib/AlgebraicTopology/SimplicialSet/NerveAdjunction.lean,Mathlib/AlgebraicTopology/SimplicialSet/NerveNondegenerate.lean,Mathlib/AlgebraicTopology/SimplicialSet/NonDegenerateSimplices.lean,Mathlib/AlgebraicTopology/SimplicialSet/Path.lean,Mathlib/AlgebraicTopology/SimplicialSet/RelativeMorphism.lean,Mathlib/AlgebraicTopology/SimplicialSet/StrictSegal.lean,Mathlib/AlgebraicTopology/SimplicialSet/Subcomplex.lean,Mathlib/AlgebraicTopology/SingularSet.lean,Mathlib/Analysis/Normed/Group/SemiNormedGrp.lean,Mathlib/CategoryTheory/Abelian/GrothendieckAxioms/Types.lean,Mathlib/CategoryTheory/Action.lean,Mathlib/CategoryTheory/Action/Basic.lean,Mathlib/CategoryTheory/Action/Concrete.lean,Mathlib/CategoryTheory/Action/Monoidal.lean,Mathlib/CategoryTheory/Adhesive/Basic.lean,Mathlib/CategoryTheory/Adjunction/Limits.lean,Mathlib/CategoryTheory/Adjunction/Opposites.lean,Mathlib/CategoryTheory/Category/Cat.lean,Mathlib/CategoryTheory/Category/Cat/Adjunction.lean,Mathlib/CategoryTheory/Category/Cat/Limit.lean,Mathlib/CategoryTheory/Category/PartialFun.lean,Mathlib/CategoryTheory/Category/Pointed.lean,Mathlib/CategoryTheory/Category/RelCat.lean,Mathlib/CategoryTheory/CodiscreteCategory.lean,Mathlib/CategoryTheory/CofilteredSystem.lean,Mathlib/CategoryTheory/Comma/Presheaf/Basic.lean,Mathlib/CategoryTheory/Comma/Presheaf/Colimit.lean,Mathlib/CategoryTheory/ConcreteCategory/Basic.lean,Mathlib/CategoryTheory/ConcreteCategory/Elementwise.lean,Mathlib/CategoryTheory/ConcreteCategory/EpiMono.lean,Mathlib/CategoryTheory/ConcreteCategory/Forget.lean,Mathlib/CategoryTheory/ConcreteCategory/ReflectsIso.lean,Mathlib/CategoryTheory/ConcreteCategory/Representable.lean,Mathlib/CategoryTheory/Core.lean,Mathlib/CategoryTheory/Elements.lean,Mathlib/CategoryTheory/Enriched/Basic.lean,Mathlib/CategoryTheory/Extensive.lean,Mathlib/CategoryTheory/Filtered/Basic.lean,Mathlib/CategoryTheory/Filtered/CostructuredArrow.lean,Mathlib/CategoryTheory/Filtered/Final.lean 333 40 ['dagurtomas', 'github-actions', 'mathlib-merge-conflicts', 'mathlib-splicebot'] nobody
4-23739
4 days ago
unknown
0-0
0 seconds
36571 harahu
author:harahu
 doc(Combinatorics): fix typos Found by `PyCharm`'s code inspection tool. Fixes were made by Codex. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-combinatorics 25/25 Mathlib/Combinatorics/Colex.lean,Mathlib/Combinatorics/Enumerative/DoubleCounting.lean,Mathlib/Combinatorics/Enumerative/IncidenceAlgebra.lean,Mathlib/Combinatorics/Matroid/Basic.lean,Mathlib/Combinatorics/Matroid/Circuit.lean,Mathlib/Combinatorics/Matroid/Map.lean,Mathlib/Combinatorics/Matroid/Minor/Contract.lean,Mathlib/Combinatorics/Matroid/Rank/ENat.lean,Mathlib/Combinatorics/Nullstellensatz.lean,Mathlib/Combinatorics/SetFamily/FourFunctions.lean,Mathlib/Combinatorics/SimpleGraph/Acyclic.lean,Mathlib/Combinatorics/SimpleGraph/Bipartite.lean,Mathlib/Combinatorics/SimpleGraph/Extremal/TuranDensity.lean,Mathlib/Combinatorics/SimpleGraph/FiveWheelLike.lean,docs/references.bib 15 1 ['github-actions'] nobody
4-23219
4 days ago
4-24212
4 days ago
4-24167
4 days
34571 xroblot
author:xroblot
 feat(CyclotomicField/Galois): the bijection between subfields and subgroups of Dirichlet characters This PR adds the first results relating the Galois theory of cyclotomic extensions to Dirichlet characters, following Washington, _Introduction to Cyclotomic Fields_. The main result is the definition of the order-preserving bijection between intermediate fields of `ℚ(ζₙ)/ℚ` and subgroups of the group of Dirichlet characters of level `n`. --- - [x] depends on: #33878 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) large-import t-algebra
label:t-algebra$
 83/1 Mathlib/FieldTheory/Normal/Defs.lean,Mathlib/NumberTheory/NumberField/Cyclotomic/Galois.lean 2 3 ['github-actions', 'mathlib-dependent-issues', 'mathlib-merge-conflicts'] dagurtomas
assignee:dagurtomas
4-18780
4 days ago
7-58154
7 days ago
7-60778
7 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
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 3 ['CBirkbeck', 'Multramate', 'github-actions', 'mathlib-merge-conflicts'] dagurtomas
assignee:dagurtomas
4-18773
4 days ago
12-69012
12 days ago
12-72990
12 days
36114 euprunin
author:euprunin
 chore: golf proofs The goal of this PR is to decrease the number of times lemmas are called explicitly (replacing calls to lemmas with calls to tactics). 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): * `Real.GammaIntegral_convergent`: unchanged 🎉 * `PartENat.lt_find`: unchanged 🎉 * `MvPFunctor.liftR_iff`: unchanged 🎉 * `LinearMap.ortho_smul_right`: unchanged 🎉 * `MeasureTheory.setToFun_nonneg`: unchanged 🎉 * `ProbabilityTheory.Kernel.measurable_lmarginalPartialTraj`: unchanged 🎉 Profiled using `set_option trace.profiler true in`. This PR is batched under the following guidelines: * Up to ~5 changed files per PR * Up to ~25 changed declarations per PR * Up to ~100 changed lines per PR --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) 6/32 Mathlib/Analysis/SpecialFunctions/Gamma/Basic.lean,Mathlib/Data/Nat/PartENat.lean,Mathlib/Data/PFunctor/Multivariate/Basic.lean,Mathlib/LinearAlgebra/SesquilinearForm/Basic.lean,Mathlib/MeasureTheory/Integral/SetToL1.lean,Mathlib/Probability/Kernel/IonescuTulcea/PartialTraj.lean 6 1 ['github-actions'] dagurtomas
assignee:dagurtomas
4-18773
4 days ago
12-72327
12 days ago
12-72282
12 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
label:t-algebra$
 46/2 Mathlib/Algebra/Category/CommAlgCat/Basic.lean,Mathlib/AlgebraicGeometry/GammaSpecAdjunction.lean,Mathlib/AlgebraicGeometry/Scheme.lean 3 14 ['CBirkbeck', 'Multramate', 'erdOne', 'github-actions'] dagurtomas
assignee:dagurtomas
4-18772
4 days ago
10-72085
10 days ago
12-16180
12 days
36338 harahu
author:harahu
 doc(Algebra): fix typos Found by `PyCharm`'s code inspection tool. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra documentation
label:t-algebra$
 30/30 Mathlib/Algebra/Algebra/Hom.lean,Mathlib/Algebra/Category/ModuleCat/Ulift.lean,Mathlib/Algebra/FiniteSupport/Basic.lean,Mathlib/Algebra/FiniteSupport/Defs.lean,Mathlib/Algebra/Group/Action/End.lean,Mathlib/Algebra/Group/Hom/Defs.lean,Mathlib/Algebra/Homology/BifunctorShift.lean,Mathlib/Algebra/Homology/CochainComplexPlus.lean,Mathlib/Algebra/Homology/DerivedCategory/Ext/Map.lean,Mathlib/Algebra/Homology/Embedding/ExtendHomotopy.lean,Mathlib/Algebra/Homology/HomologicalBicomplex.lean,Mathlib/Algebra/Homology/HomotopyCategory/HomComplexSingle.lean,Mathlib/Algebra/Homology/HomotopyCategory/Pretriangulated.lean,Mathlib/Algebra/Homology/HomotopyCategory/SingleFunctors.lean,Mathlib/Algebra/Homology/ModelCategory/Lifting.lean,Mathlib/Algebra/Lie/CartanExists.lean,Mathlib/Algebra/Lie/Derivation/Basic.lean,Mathlib/Algebra/Lie/EngelSubalgebra.lean,Mathlib/Algebra/NonAssoc/LieAdmissible/Defs.lean,Mathlib/Algebra/Order/Antidiag/Prod.lean,Mathlib/Algebra/Order/Hom/Monoid.lean,Mathlib/Algebra/Order/SuccPred/TypeTags.lean,Mathlib/Algebra/Polynomial/PartialFractions.lean 23 3 ['euprunin', 'github-actions', 'harahu', 'mathlib-merge-conflicts', 'plp127'] dagurtomas
assignee:dagurtomas
4-18765
4 days ago
8-47739
8 days ago
9-24057
9 days
36407 j-loreaux
author:j-loreaux
 feat: norm of sums of continuous functions whose product is zero For continuous functions whose pairwise products are zero, the norm of the sum is the maximum of the norms of the individual functions. This is useful for proving the analogous norm properties for commuting selfadjoint (or normal) elements in a C⋆-algebra. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-topology 87/0 Mathlib/Topology/ContinuousMap/Bounded/Normed.lean,Mathlib/Topology/ContinuousMap/Compact.lean 2 3 ['github-actions', 'themathqueen'] dagurtomas
assignee:dagurtomas
4-18761
4 days ago
7-26303
7 days ago
7-42715
7 days
36413 JovanGerb
author:JovanGerb
 chore(Algebra/Group/InjSurj): clean up instances This PR give a bit of speedup by cleaning up some `Function.Injective.` and `Function.Surjective.` instances. The main point is to put the arguments in the correct order in `{ ..., ... with }`, matching the order of the `extends` clause. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-meta 21/24 Mathlib/Algebra/Group/InjSurj.lean 1 4 ['JovanGerb', 'github-actions', 'leanprover-radar', 'mathlib-bors'] dwrensha
assignee:dwrensha
4-18761
4 days ago
7-40325
7 days ago
0-6
6 seconds
36578 kim-em
author:kim-em
 experiment: `rm_set_option.py` after greedily deploying #36420's `inferInstanceAs%` 822 `set_option.backward`s removed. merge-conflict 462/1180 Archive/Imo/Imo1959Q2.lean,Archive/Imo/Imo1963Q5.lean,Archive/Imo/Imo1982Q3.lean,Archive/Imo/Imo2006Q3.lean,Archive/Wiedijk100Theorems/BuffonsNeedle.lean,Archive/Wiedijk100Theorems/HeronsFormula.lean,Archive/Wiedijk100Theorems/SolutionOfCubicQuartic.lean,Counterexamples/HeawoodUnitDistance.lean,Counterexamples/HomogeneousPrimeNotPrime.lean,Mathlib/Algebra/Algebra/Subalgebra/Basic.lean,Mathlib/Algebra/Algebra/Subalgebra/Lattice.lean,Mathlib/Algebra/Algebra/ZMod.lean,Mathlib/Algebra/Category/AlgCat/Symmetric.lean,Mathlib/Algebra/Category/FGModuleCat/EssentiallySmall.lean,Mathlib/Algebra/Category/Grp/FiniteGrp.lean,Mathlib/Algebra/Category/HopfAlgCat/Monoidal.lean,Mathlib/Algebra/Category/ModuleCat/ExteriorPower.lean,Mathlib/Algebra/Category/ModuleCat/Limits.lean,Mathlib/Algebra/Category/ModuleCat/Localization.lean,Mathlib/Algebra/Category/ModuleCat/Monoidal/Basic.lean,Mathlib/Algebra/Category/Ring/LinearAlgebra.lean,Mathlib/Algebra/Colimit/Module.lean,Mathlib/Algebra/DirectSum/Basic.lean,Mathlib/Algebra/Field/Equiv.lean,Mathlib/Algebra/Field/Subfield/Basic.lean,Mathlib/Algebra/Group/Subgroup/Actions.lean,Mathlib/Algebra/Group/Submonoid/Saturation.lean,Mathlib/Algebra/Homology/DerivedCategory/ExactFunctor.lean,Mathlib/Algebra/Homology/Functor.lean,Mathlib/Algebra/Homology/HomotopyCategory/HomComplexCohomology.lean,Mathlib/Algebra/Lie/Derivation/Basic.lean,Mathlib/Algebra/Lie/Free.lean,Mathlib/Algebra/Lie/NonUnitalNonAssocAlgebra.lean,Mathlib/Algebra/Module/CharacterModule.lean,Mathlib/Algebra/Module/Congruence/Defs.lean,Mathlib/Algebra/Module/LinearMap/Defs.lean,Mathlib/Algebra/Module/LocalizedModule/Basic.lean,Mathlib/Algebra/Module/PUnit.lean,Mathlib/Algebra/MvPolynomial/Nilpotent.lean,Mathlib/Algebra/Order/Floor/Ring.lean,Mathlib/Algebra/Order/Floor/Semifield.lean,Mathlib/Algebra/Order/Group/Unbundled/Abs.lean,Mathlib/Algebra/Order/Ring/StandardPart.lean,Mathlib/Algebra/Polynomial/Module/Basic.lean,Mathlib/Algebra/Quandle.lean,Mathlib/Algebra/Quaternion.lean,Mathlib/Algebra/Ring/Action/Subobjects.lean,Mathlib/Algebra/Ring/Prod.lean,Mathlib/Algebra/Ring/Subring/Basic.lean,Mathlib/Algebra/Star/NonUnitalSubalgebra.lean,Mathlib/Algebra/Star/Prod.lean,Mathlib/Algebra/Star/StarAlgHom.lean,Mathlib/Algebra/Star/Unitary.lean,Mathlib/AlgebraicGeometry/AffineScheme.lean,Mathlib/AlgebraicGeometry/Artinian.lean,Mathlib/AlgebraicGeometry/FunctionField.lean,Mathlib/AlgebraicGeometry/Geometrically/Basic.lean,Mathlib/AlgebraicGeometry/IdealSheaf/Basic.lean,Mathlib/AlgebraicGeometry/Limits.lean,Mathlib/AlgebraicGeometry/LimitsOver.lean,Mathlib/AlgebraicGeometry/Modules/Sheaf.lean,Mathlib/AlgebraicGeometry/Modules/Tilde.lean,Mathlib/AlgebraicGeometry/Morphisms/ClosedImmersion.lean,Mathlib/AlgebraicGeometry/Morphisms/Finite.lean,Mathlib/AlgebraicGeometry/Morphisms/SchemeTheoreticallyDominant.lean,Mathlib/AlgebraicGeometry/Morphisms/UniversallyOpen.lean,Mathlib/AlgebraicGeometry/Normalization.lean,Mathlib/AlgebraicGeometry/ResidueField.lean,Mathlib/AlgebraicGeometry/StructureSheaf.lean,Mathlib/AlgebraicTopology/FundamentalGroupoid/Basic.lean,Mathlib/AlgebraicTopology/FundamentalGroupoid/FundamentalGroup.lean,Mathlib/AlgebraicTopology/SimplexCategory/Basic.lean,Mathlib/AlgebraicTopology/SimplicialCategory/SimplicialObject.lean,Mathlib/AlgebraicTopology/SimplicialNerve.lean,Mathlib/AlgebraicTopology/SimplicialSet/HoFunctorMonoidal.lean,Mathlib/AlgebraicTopology/SimplicialSet/HomotopyCat.lean,Mathlib/AlgebraicTopology/SimplicialSet/Monoidal.lean,Mathlib/AlgebraicTopology/TopologicalSimplex.lean,Mathlib/Analysis/Asymptotics/ExpGrowth.lean,Mathlib/Analysis/Asymptotics/LinearGrowth.lean,Mathlib/Analysis/CStarAlgebra/ContinuousFunctionalCalculus/Continuity.lean,Mathlib/Analysis/CStarAlgebra/ContinuousFunctionalCalculus/Integral.lean,Mathlib/Analysis/CStarAlgebra/ContinuousFunctionalCalculus/Order.lean,Mathlib/Analysis/CStarAlgebra/ContinuousFunctionalCalculus/Range.lean,Mathlib/Analysis/CStarAlgebra/ContinuousMap.lean,Mathlib/Analysis/CStarAlgebra/GelfandDuality.lean,Mathlib/Analysis/CStarAlgebra/GelfandNaimarkSegal.lean,Mathlib/Analysis/Calculus/FDeriv/Symmetric.lean,Mathlib/Analysis/Calculus/LogDeriv.lean,Mathlib/Analysis/Calculus/MeanValue.lean,Mathlib/Analysis/Calculus/SmoothSeries.lean,Mathlib/Analysis/Calculus/UniformLimitsDeriv.lean,Mathlib/Analysis/Complex/BorelCaratheodory.lean,Mathlib/Analysis/Complex/Exponential.lean,Mathlib/Analysis/Complex/Harmonic/Analytic.lean,Mathlib/Analysis/Complex/Harmonic/Liouville.lean,Mathlib/Analysis/Complex/Harmonic/MeanValue.lean,Mathlib/Analysis/Complex/Polynomial/Basic.lean,Mathlib/Analysis/Complex/UpperHalfPlane/Measure.lean,Mathlib/Analysis/Complex/UpperHalfPlane/Metric.lean 430 1 ['github-actions'] nobody
4-11814
4 days ago
4-11927
4 days ago
0-48
48 seconds
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
4-10200
4 days ago
118-29387
118 days ago
57-16569
57 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 22 ['Parcly-Taxel', 'b-mehta', 'eric-wieser', 'github-actions', 'jsm28', 'vihdzp'] kmill
assignee:kmill
4-8626
4 days ago
62-35892
62 days ago
62-35847
62 days
35963 Parcly-Taxel
author:Parcly-Taxel
 refactor: review Kleene algebra axioms Derive ```lean one_add_mul_kstar (a : α) : 1 + a * a∗ = a∗ one_add_kstar_mul (a : α) : 1 + a∗ * a = a∗ ``` which is Proposition 2 in Kozen's 1994 paper. We also remove the `bot` and `bot_le` fields in `IdemSemiring`, since the remaining axioms already show `0 ≤ a` for all `a`. t-algebra
label:t-algebra$
 82/81 Mathlib/Algebra/Algebra/Operations.lean,Mathlib/Algebra/Order/Kleene.lean,Mathlib/AlgebraicGeometry/IdealSheaf/Basic.lean 3 13 ['Parcly-Taxel', 'dagurtomas', 'github-actions', 'plp127', 'vihdzp'] nobody
4-3094
4 days ago
4-3145
4 days ago
14-26972
14 days
36520 tb65536
author:tb65536
 feat(Analysis/InnterProductSpace/Spectrum): the spectral theorem for compact self-adjoint operators This PR proves that the eigenspaces of a compact self-adjoint operator are finite dimensional and have trivial orthogonal complement. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-analysis 89/4 Mathlib/Analysis/InnerProductSpace/Spectrum.lean,Mathlib/Analysis/Normed/Group/Submodule.lean,Mathlib/Topology/Algebra/Module/LinearMap.lean 3 1 ['github-actions'] j-loreaux
assignee:j-loreaux
4-20
4 days ago
4-74
4 days ago
4-74244
4 days
32058 Thmoas-Guan
author:Thmoas-Guan
 feat(Algebra): category version Baer criterion 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. --- - [ ] depends on: #35882 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra t-category-theory awaiting-author
label:t-algebra$
 142/0 Mathlib.lean,Mathlib/Algebra/Category/ModuleCat/Baer.lean,Mathlib/Algebra/Homology/ShortComplex/ModuleCat.lean 3 22 ['Thmoas-Guan', 'dagurtomas', 'github-actions', 'joelriou', 'mathlib-dependent-issues', 'mathlib4-merge-conflict-bot'] dagurtomas
assignee:dagurtomas
3-83067
3 days ago
16-84331
16 days ago
7-19844
7 days
35740 LLaurance
author:LLaurance
 chore(SimpleGraph/Basic): clean up and shorten Clean up and shorten some proofs --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-combinatorics WIP merge-conflict 43/50 Mathlib/Combinatorics/SimpleGraph/Basic.lean 1 3 ['LLaurance', 'github-actions', 'mathlib-merge-conflicts'] nobody
3-82869
3 days ago
19-27308
19 days ago
19-27263
19 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 blocked-by-other-PR merge-conflict
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
3-82860
3 days ago
7-31769
7 days ago
0-1
1 second
36515 kim-em
author:kim-em
 experiment: how many `inferInstanceAs` can be replaced with `inferInstanceAs%` (#36420 version) This is a data-gathering follow-up to @JovanGerb's #36420 (second implementation of the `inferInstanceAs%` term elaborator). We replace every `inferInstanceAs` with `inferInstanceAs%` where this does not cause an error. There is no implicit claim that these changes are a good idea. It lets us do three things: * every remaining `inferInstanceAs` will cause an error with `inferInstanceAs%`, and @JovanGerb (or me, or anyone!) mightly usefully investigate these! * I will run `!radar` below to get timing data * I will run `scripts/rm_set_option.py` to see what impact this has on `set_option backward.isDefeqEq.respectTransparency`. WIP merge-conflict 462/358 Counterexamples/HomogeneousPrimeNotPrime.lean,Mathlib/Algebra/Algebra/Subalgebra/Basic.lean,Mathlib/Algebra/Algebra/Subalgebra/Lattice.lean,Mathlib/Algebra/Algebra/ZMod.lean,Mathlib/Algebra/Category/FGModuleCat/EssentiallySmall.lean,Mathlib/Algebra/Category/Grp/FiniteGrp.lean,Mathlib/Algebra/Category/ModuleCat/ExteriorPower.lean,Mathlib/Algebra/Category/ModuleCat/Localization.lean,Mathlib/Algebra/Colimit/Module.lean,Mathlib/Algebra/DirectSum/Basic.lean,Mathlib/Algebra/Field/Subfield/Basic.lean,Mathlib/Algebra/Group/Subgroup/Actions.lean,Mathlib/Algebra/Group/Submonoid/Saturation.lean,Mathlib/Algebra/Homology/DerivedCategory/ExactFunctor.lean,Mathlib/Algebra/Homology/HomotopyCategory/HomComplexCohomology.lean,Mathlib/Algebra/Module/CharacterModule.lean,Mathlib/Algebra/Module/Congruence/Defs.lean,Mathlib/Algebra/Module/LinearMap/Defs.lean,Mathlib/Algebra/Module/LocalizedModule/Basic.lean,Mathlib/Algebra/Module/PUnit.lean,Mathlib/Algebra/Order/Ring/StandardPart.lean,Mathlib/Algebra/Polynomial/Module/Basic.lean,Mathlib/Algebra/Quaternion.lean,Mathlib/Algebra/Ring/Action/Subobjects.lean,Mathlib/Algebra/Ring/Prod.lean,Mathlib/Algebra/Ring/Subring/Basic.lean,Mathlib/Algebra/Star/Prod.lean,Mathlib/Algebra/Star/StarAlgHom.lean,Mathlib/Algebra/Star/Unitary.lean,Mathlib/AlgebraicGeometry/AffineScheme.lean,Mathlib/AlgebraicGeometry/IdealSheaf/Basic.lean,Mathlib/AlgebraicGeometry/Modules/Sheaf.lean,Mathlib/AlgebraicGeometry/Modules/Tilde.lean,Mathlib/AlgebraicGeometry/ResidueField.lean,Mathlib/AlgebraicGeometry/StructureSheaf.lean,Mathlib/AlgebraicTopology/FundamentalGroupoid/FundamentalGroup.lean,Mathlib/AlgebraicTopology/SimplexCategory/Basic.lean,Mathlib/AlgebraicTopology/SimplicialCategory/SimplicialObject.lean,Mathlib/AlgebraicTopology/SimplicialNerve.lean,Mathlib/AlgebraicTopology/SimplicialSet/HoFunctorMonoidal.lean,Mathlib/AlgebraicTopology/SimplicialSet/HomotopyCat.lean,Mathlib/AlgebraicTopology/SimplicialSet/Monoidal.lean,Mathlib/AlgebraicTopology/TopologicalSimplex.lean,Mathlib/Analysis/Normed/Field/Basic.lean,Mathlib/CategoryTheory/Action/Monoidal.lean,Mathlib/CategoryTheory/Monoidal/Cartesian/GrpLimits.lean,Mathlib/CategoryTheory/Monoidal/CommGrp_.lean,Mathlib/CategoryTheory/Monoidal/Grp_.lean,Mathlib/CategoryTheory/Preadditive/Basic.lean,Mathlib/CategoryTheory/Shift/CommShiftTwo.lean,Mathlib/CategoryTheory/Shift/Opposite.lean,Mathlib/CategoryTheory/Sites/Monoidal.lean,Mathlib/CategoryTheory/Triangulated/Opposite/Functor.lean,Mathlib/CategoryTheory/Triangulated/Opposite/OpOp.lean,Mathlib/Combinatorics/SimpleGraph/Circulant.lean,Mathlib/Computability/Encoding.lean,Mathlib/Computability/TuringMachine/Computable.lean,Mathlib/Data/DFinsupp/Module.lean,Mathlib/Data/ENat/Basic.lean,Mathlib/Data/ENat/Lattice.lean,Mathlib/Data/EReal/Basic.lean,Mathlib/Data/EReal/Inv.lean,Mathlib/Data/Matrix/Basic.lean,Mathlib/FieldTheory/Finite/Polynomial.lean,Mathlib/FieldTheory/IntermediateField/Adjoin/Defs.lean,Mathlib/FieldTheory/IntermediateField/Basic.lean,Mathlib/GroupTheory/GroupAction/Defs.lean,Mathlib/GroupTheory/GroupAction/OfQuotient.lean,Mathlib/GroupTheory/SchurZassenhaus.lean,Mathlib/GroupTheory/Submonoid/Inverses.lean,Mathlib/GroupTheory/Torsion.lean,Mathlib/LinearAlgebra/SymmetricAlgebra/Basic.lean,Mathlib/NumberTheory/ArithmeticFunction/Defs.lean,Mathlib/NumberTheory/NumberField/Basic.lean,Mathlib/NumberTheory/Padics/WithVal.lean,Mathlib/NumberTheory/Pell.lean,Mathlib/RingTheory/Congruence/Basic.lean,Mathlib/RingTheory/Congruence/Defs.lean,Mathlib/RingTheory/Etale/Kaehler.lean,Mathlib/RingTheory/Extension/Basic.lean,Mathlib/RingTheory/FreeCommRing.lean,Mathlib/RingTheory/HahnSeries/Multiplication.lean,Mathlib/RingTheory/HopfAlgebra/MonoidAlgebra.lean,Mathlib/RingTheory/Invariant/Basic.lean,Mathlib/RingTheory/IsTensorProduct.lean,Mathlib/RingTheory/MvPowerSeries/Basic.lean,Mathlib/RingTheory/MvPowerSeries/Inverse.lean,Mathlib/RingTheory/NormalClosure.lean,Mathlib/RingTheory/OreLocalization/Basic.lean,Mathlib/RingTheory/OreLocalization/Ring.lean,Mathlib/RingTheory/PiTensorProduct.lean,Mathlib/RingTheory/Smooth/Kaehler.lean,Mathlib/RingTheory/Unramified/LocalRing.lean,Mathlib/RingTheory/Valuation/Archimedean.lean,Mathlib/RingTheory/Valuation/Basic.lean,Mathlib/RingTheory/Valuation/Extension.lean,Mathlib/RingTheory/Valuation/ValuationSubring.lean,Mathlib/SetTheory/Ordinal/Basic.lean,Mathlib/Tactic/FastInstance.lean,Mathlib/Topology/Algebra/Group/GroupTopology.lean 111 5 ['github-actions', 'kim-em', 'leanprover-radar', 'mathlib-merge-conflicts'] nobody
3-82856
3 days ago
4-85892
4 days ago
0-468
7 minutes
36552 j-loreaux
author:j-loreaux
 feat: add instances for `IsMulCommutative s.toWeakerSubobject` --- - [ ] depends on: #36549 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra blocked-by-other-PR merge-conflict
label:t-algebra$
 720/111 Mathlib/Algebra/Algebra/NonUnitalSubalgebra.lean,Mathlib/Algebra/Algebra/Subalgebra/Basic.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/Map.lean,Mathlib/Algebra/Group/Submonoid/Defs.lean,Mathlib/Algebra/Group/Subsemigroup/Defs.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 39 3 ['github-actions', 'mathlib-dependent-issues', 'mathlib-merge-conflicts'] nobody
3-82855
3 days ago
4-38633
4 days ago
0-305
5 minutes
34717 CoolRmal
author:CoolRmal
 feat: add more APIs for the first derivative test The derivative test in Mathlib right now only says whether a point is local maximum. This is hard to use in practice (for example in the [PNT](https://github.com/AlexKontorovich/PrimeNumberTheoremAnd) project) as we sometimes want to show that a point is a maximum on some interval. This PR adds more APIs for the first derivative test to resolve this issue. Co-authored-by: Louis Liu @Deep0Thinking --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-analysis t-order 412/32 Mathlib/Analysis/Calculus/DerivativeTest.lean,Mathlib/Topology/Order/OrderClosedExtr.lean 2 4 ['CoolRmal', 'MichaelStollBayreuth', 'github-actions'] nobody
3-80157
3 days ago
42-73453
42 days ago
0-25
25 seconds
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/) 18/32 Mathlib/Topology/Algebra/Valued/WithVal.lean 1 3 ['github-actions', 'mathlib-dependent-issues', 'mathlib-merge-conflicts'] nobody
3-76399
3 days ago
4-26390
4 days ago
4-81332
4 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
3-73837
3 days ago
30-71047
30 days ago
0-1
1 second
33731 nielsvoss
author:nielsvoss
 feat(Analysis/InnerProductSpace): definition of singular values for finite-dimensional inner product spaces This PR defines the singular values for linear maps between finite-dimensional inner product spaces. The API is designed in a way that allows it to be generalized to the approximation numbers, as defined in #32126. See the discussion on Zulip: https://leanprover.zulipchat.com/#narrow/channel/217875-Is-there-code-for-X.3F/topic/Singular.20Value.20Decomposition/with/558914024 --- - [x] depends on: #34362 - [x] depends on: #34660 - [x] depends on: #35174 - [x] depends on: #35236 - [x] depends on: #35582 - [x] depends on: #36106 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-analysis new-contributor 216/0 Mathlib.lean,Mathlib/Analysis/InnerProductSpace/SingularValues.lean 2 27 ['b-mehta', 'dupuisf', 'eric-wieser', 'github-actions', 'j-loreaux', 'mathlib-dependent-issues', 'nielsvoss', 'themathqueen'] nobody
3-73315
3 days ago
3-73191
3 days ago
3-73458
3 days
32245 erdOne
author:erdOne
 feat(RingTheory): the `coassoc_simps` simp set From Toric Co-authored-by: Yaël Dillies --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-ring-theory toric t-meta awaiting-author 815/0 Mathlib.lean,Mathlib/RingTheory/Coalgebra/CoassocSimps.lean,Mathlib/Tactic/Attr/Register.lean,MathlibTest/RingTheory/CoassocSimps.lean 4 24 ['Paul-Lez', 'b-mehta', 'erdOne', 'github-actions', 'joneugster', 'riccardobrasca'] b-mehta, joneugster, mattrobball
assignee:joneugster assignee:b-mehta assignee:mattrobball
3-71322
3 days ago
25-48455
25 days ago
42-71585
42 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/) 86/216 Mathlib/Data/Finset/Lattice/Fold.lean,Mathlib/Data/Finset/Lattice/Prod.lean,Mathlib/Order/CompleteLattice/Basic.lean,Mathlib/Order/ConditionallyCompleteLattice/Finset.lean,Mathlib/Order/ConditionallyCompletePartialOrder/Defs.lean,Mathlib/Order/SupClosed.lean 6 3 ['github-actions', 'mathlib-merge-conflicts'] nobody
3-71175
3 days ago
unknown
0-0
0 seconds
36116 xgenereux
author:xgenereux
 feat(Module/Torsion): P-primary component This PR adds the definition of the `P`-primary component of a module: $$M(P) := \bigcup_{i : \mathbb{N}} \text{torsionBySet A M } P ^ i.$$ as well as some basic lemmas on how it behaves on `inf` and `sup`. The main goal of this definition is to eventually have $$M = \bigoplus_{P} M(P).$$ as well as showing that: Given a surjective linear map `(φ : M₂ →ₗ[A] M₃)`, we have: `Surjective (primaryComponent.map P φ)`. These will require #35539 and I will them PR separately. (Proof is quite small but they should be their own PR I think.) Looking forward for feedback on this! 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-algebra awaiting-author
label:t-algebra$
 143/0 Mathlib.lean,Mathlib/Algebra/Module/Torsion/Basic.lean,Mathlib/Algebra/Module/Torsion/PrimaryComponent.lean 3 8 ['dagurtomas', 'github-actions', 'xgenereux'] dagurtomas
assignee:dagurtomas
3-69202
3 days ago
4-39871
4 days ago
8-30493
8 days
36201 themathqueen
author:themathqueen
 feat(Analysis/CStarAlgebra): set of star projections equals the extreme points of the nonnegative closed unit ball An element in a non-unital C⋆-algebra is a projection iff it is an extreme point of the nonnegative closed unit ball. This is from 1.6.2 in Sakai's C⋆-algebras and W⋆-algebras (the proof is different though). Co-authored-by: Jon Bannon <59937998+JonBannon@users.noreply.github.com> --- - [x] depends on: #35997 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-analysis 96/0 Mathlib.lean,Mathlib/Analysis/CStarAlgebra/Extreme.lean,docs/references.bib 3 4 ['github-actions', 'j-loreaux', 'mathlib-dependent-issues', 'themathqueen'] nobody
3-68914
3 days ago
3-68965
3 days ago
5-58680
5 days
36376 jessealama
author:jessealama
 feat(SimpleGraph): bridge from Perm.IsCycle to IsHamiltonian This PR provides `IsHamiltonian.ofPerm`, 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/Combinatorics/SimpleGraph/Walks/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` - `Walk.iterate_length`, `Walk.iterate_getVert`, `Walk.iterate_support`, `Walk.iterate_edges`: 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`**: - `Perm.toList_eq_range_map_pow`: expresses `toList` as a range map over powers **`Mathlib/Combinatorics/SimpleGraph/Hamiltonian.lean`**: - `edge_ne_of_isCycleOn`: edge distinctness for cycle-on permutations - `IsHamiltonian.ofPerm`: the main theorem large-import 158/0 Mathlib.lean,Mathlib/Combinatorics/SimpleGraph/Hamiltonian.lean,Mathlib/Combinatorics/SimpleGraph/Walks/Iterate.lean,Mathlib/GroupTheory/Perm/Cycle/Basic.lean,Mathlib/GroupTheory/Perm/Cycle/Concrete.lean 5 33 ['SnirBroshi', 'github-actions', 'jessealama', 'mathlib-merge-conflicts'] nobody
3-68725
3 days ago
3-73725
3 days ago
6-81785
6 days
36594 Vierkantor
author:Vierkantor
 chore(Tactic): rewrite `lift` tactic docstring This PR rewrites the docstrings for the `lift` tactic, to make sure they are complete while not getting too long. The main change, apart from restructuring the bullet points to fit the style guide, is to treat the form `lift e to t with x`, where `e` is any expression, as the "general" form, and the case where `e` is a variable as a specialized form. Although it doesn't match the historical development, I think this is clearer for new users (since explaining `lift` without `with` as a special case can be done with only one line). Similarly, we separate `using` into its own bullet point. In this docstring I did not include the alternative form `lift e to t with x rfl`, since it is exactly equivalent to `lift e to to with x` as far as I can tell. I did include `lift e to t with x rfl h`, because it is useful for preserving the `using` hypothesis without naming the introduced equality. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) documentation t-meta 61/33 Mathlib/Tactic/Lift.lean 1 1 ['github-actions'] nobody
3-67147
3 days ago
3-67220
3 days ago
3-67175
3 days
35813 joelriou
author:joelriou
 feat(Algebra/Homology): a factorization lemma In this PR, we show that if `f : K ⟶ L` is a morphism between bounded below cochain complexes in an abelian category with enough injectives, then there exists a factorization `ι ≫ π = f` with `ι : K ⟶ K'` a monomorphism that is also a quasi-isomorphism and `π : K' ⟶ L` a morphism which degreewise is an epimorphism with an injective kernel, while `K'` is also bounded below (with precise bounds depending on the available bounds for `K` and `L`). This will be an essential result towards the construction of the Quillen model category structure on bounded below cochain complexes in an abelian category with enough injectives, and it will be used in order to construct the total right derived functor of a (right exact) functor. --- (This is an attempt at cleaning up the code in https://github.com/joelriou/mathlib4/blob/jriou_localization/Mathlib/Algebra/Homology/Factorizations/CM5a.lean) - [ ] depends on: #36593 - [x] depends on: #35931 - [x] depends on: #35939 - [x] depends on: #35929 - [x] depends on: #35930 - [x] depends on: #35932 - [x] depends on: #35934 - [x] depends on: #35935 - [x] depends on: #35936 - [x] depends on: #35937 - [x] depends on: #35938 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) WIP t-category-theory blocked-by-other-PR 664/0 Mathlib.lean,Mathlib/Algebra/Homology/Factorizations/CM5a.lean 2 4 ['github-actions', 'mathlib-dependent-issues', 'mathlib-merge-conflicts'] nobody
3-65918
3 days ago
18-58110
18 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
3-63797
3 days ago
unknown
0-0
0 seconds
36088 pevogam
author:pevogam
 feat: add a LE version of previous div_lt_div_iff_mul_lt_mul theorem The following is more useful due to the partial order application of LE in comparison to LT. Additionally, add specialized cases of equal denominators as simpler syntactic sugar. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra new-contributor
label:t-algebra$
 16/0 Mathlib/Algebra/Order/Ring/Unbundled/Rat.lean 1 6 ['dagurtomas', 'github-actions', 'pevogam'] dagurtomas
assignee:dagurtomas
3-63074
3 days ago
13-26028
13 days ago
13-26089
13 days
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/) blocked-by-other-PR merge-conflict 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
3-62652
3 days ago
4-22657
4 days ago
0-153
2 minutes
34871 zhuyizheng
author:zhuyizheng
 feat(Calculus): Taylor with integral remainder This PR proves Taylor's theorem with the integral remainder. It provides two versions: 1. based on $f^{(n)}$ is absolutely continuous 2. based on $f \in C^{(n+1)}$ It also weakens the hypotheses `(hx : x₀ < x)` to `(hx : x₀ ≠ x)` in the following theorems: - `taylor_mean_remainder` - `taylor_mean_remainder_lagrange` - `taylor_mean_remainder_lagrange_iteratedDeriv` - `taylor_mean_remainder_cauchy` --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) large-import t-analysis awaiting-author 215/71 Mathlib/Analysis/Calculus/ContDiff/Deriv.lean,Mathlib/Analysis/Calculus/IteratedDeriv/Defs.lean,Mathlib/Analysis/Calculus/Taylor.lean,Mathlib/MeasureTheory/Function/AbsolutelyContinuous.lean,Mathlib/Probability/Moments/MGFAnalytic.lean,Mathlib/Topology/Algebra/InfiniteSum/TsumUniformlyOn.lean,docs/undergrad.yaml 7 16 ['Komyyy', 'b-mehta', 'github-actions', 'joneugster', 'mathlib-merge-conflicts', 'sgouezel', 'zhuyizheng'] sgouezel
assignee:sgouezel
3-61043
3 days ago
19-58962
19 days ago
36-330
36 days
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 (This is WIP because it still needs some `erw`, various instances do not seem to match, and the overall structure has to be cleaned-up. - 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/) WIP t-algebra
label:t-algebra$
 569/0 Mathlib.lean,Mathlib/Data/DFinsupp/BigOperators.lean,Mathlib/RingTheory/GradedAlgebra/Homogeneous/RingQuot.lean 3 1 ['github-actions'] nobody
3-60736
3 days ago
5-26400
5 days ago
0-13
13 seconds
29186 winstonyin
author:winstonyin
 feat: IsIntegralCurve for solutions to ODEs I define `IsIntegralCurve` etc. for solutions to ODEs on vector spaces. The translation and scaling lemmas are also included. This parallels `IsMIntegralCurve` etc. for manifolds. Moved from #26534. - [x] depends on: #26563 --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-dynamics t-differential-geometry t-analysis delegated 309/17 Mathlib.lean,Mathlib/Analysis/ODE/Basic.lean,Mathlib/Analysis/ODE/Transform.lean,Mathlib/Geometry/Manifold/IntegralCurve/Transform.lean,Mathlib/Geometry/Manifold/IntegralCurve/UniformTime.lean 5 34 ['github-actions', 'grunweg', 'mathlib-bors', 'mathlib-merge-conflicts', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot', 'mcdoll', 'michaellee94', 'sgouezel', 'winstonyin'] sgouezel
assignee:sgouezel
3-60604
3 days ago
14-35438
14 days ago
146-40137
146 days
36593 joelriou
author:joelriou
 feat(Algebra/Homology): first step of a factorization lemma This is the first in a series of three PRs towards #35813 which shall show that if `f : K ⟶ L` is a morphism between bounded below cochain complexes in an abelian category with enough injectives, then there exists a factorization `ι ≫ π = f` with `ι : K ⟶ K'` a monomorphism that is also a quasi-isomorphism and `π : K' ⟶ L` a morphism which degreewise is an epimorphism with an injective kernel, while `K'` is also bounded below (with precise bounds depending on the available bounds for `K` and `L`). The construction of the intermediate object `K'` is obtained by taking a degreewise eventually constant projective limit of cochain complexes, where the complexes in the projective system are constructed step by step. Each step decomposes further into two lemmas `step₁` and `step₂`. In this PR, we prove `step₁`. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-category-theory t-algebra
label:t-algebra$
 248/0 Mathlib.lean,Mathlib/Algebra/Homology/Factorizations/CM5a.lean 2 2 ['github-actions', 'joelriou'] nobody
3-59990
3 days ago
3-60051
3 days ago
3-60454
3 days
36502 dagurtomas
author:dagurtomas
 Typecat refactor 2 --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict 3378/2827 Mathlib/Algebra/Category/AlgCat/Basic.lean,Mathlib/Algebra/Category/AlgCat/Limits.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/CartesianMonoidal.lean,Mathlib/Algebra/Category/Grp/EpiMono.lean,Mathlib/Algebra/Category/Grp/LeftExactFunctor.lean,Mathlib/Algebra/Category/Grp/Limits.lean,Mathlib/Algebra/Category/Grp/Yoneda.lean,Mathlib/Algebra/Category/ModuleCat/Adjunctions.lean,Mathlib/Algebra/Category/ModuleCat/Basic.lean,Mathlib/Algebra/Category/ModuleCat/EpiMono.lean,Mathlib/Algebra/Category/ModuleCat/FilteredColimits.lean,Mathlib/Algebra/Category/ModuleCat/LeftResolution.lean,Mathlib/Algebra/Category/ModuleCat/Limits.lean,Mathlib/Algebra/Category/ModuleCat/Presheaf.lean,Mathlib/Algebra/Category/ModuleCat/Presheaf/EpiMono.lean,Mathlib/Algebra/Category/ModuleCat/Presheaf/Free.lean,Mathlib/Algebra/Category/ModuleCat/Presheaf/Generator.lean,Mathlib/Algebra/Category/ModuleCat/Presheaf/Sheafify.lean,Mathlib/Algebra/Category/ModuleCat/Semi.lean,Mathlib/Algebra/Category/ModuleCat/Sheaf.lean,Mathlib/Algebra/Category/ModuleCat/Sheaf/Free.lean,Mathlib/Algebra/Category/ModuleCat/Sheaf/PullbackFree.lean,Mathlib/Algebra/Category/ModuleCat/Stalk.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/MonCat/Yoneda.lean,Mathlib/Algebra/Category/Ring/Adjunctions.lean,Mathlib/Algebra/Category/Ring/Basic.lean,Mathlib/Algebra/Category/Ring/Constructions.lean,Mathlib/Algebra/Category/Ring/FilteredColimits.lean,Mathlib/Algebra/Category/Ring/Limits.lean,Mathlib/Algebra/Category/Semigrp/Basic.lean,Mathlib/Algebra/Homology/ShortComplex/ConcreteCategory.lean,Mathlib/AlgebraicGeometry/ProjectiveSpectrum/StructureSheaf.lean,Mathlib/AlgebraicGeometry/Scheme.lean,Mathlib/AlgebraicTopology/ExtraDegeneracy.lean,Mathlib/AlgebraicTopology/Quasicategory/StrictSegal.lean,Mathlib/AlgebraicTopology/SimplexCategory/Basic.lean,Mathlib/AlgebraicTopology/SimplexCategory/Defs.lean,Mathlib/AlgebraicTopology/SimplicialNerve.lean,Mathlib/AlgebraicTopology/SimplicialSet/Basic.lean,Mathlib/AlgebraicTopology/SimplicialSet/Coskeletal.lean,Mathlib/AlgebraicTopology/SimplicialSet/Degenerate.lean,Mathlib/AlgebraicTopology/SimplicialSet/Dimension.lean,Mathlib/AlgebraicTopology/SimplicialSet/Finite.lean,Mathlib/AlgebraicTopology/SimplicialSet/HoFunctorMonoidal.lean,Mathlib/AlgebraicTopology/SimplicialSet/HomotopyCat.lean,Mathlib/AlgebraicTopology/SimplicialSet/Horn.lean,Mathlib/AlgebraicTopology/SimplicialSet/Monoidal.lean,Mathlib/AlgebraicTopology/SimplicialSet/Nerve.lean,Mathlib/AlgebraicTopology/SimplicialSet/NerveAdjunction.lean,Mathlib/AlgebraicTopology/SimplicialSet/NerveNondegenerate.lean,Mathlib/AlgebraicTopology/SimplicialSet/NonDegenerateSimplices.lean,Mathlib/AlgebraicTopology/SimplicialSet/Path.lean,Mathlib/AlgebraicTopology/SimplicialSet/RelativeMorphism.lean,Mathlib/AlgebraicTopology/SimplicialSet/StrictSegal.lean,Mathlib/AlgebraicTopology/SimplicialSet/Subcomplex.lean,Mathlib/AlgebraicTopology/SingularSet.lean,Mathlib/Analysis/Normed/Group/SemiNormedGrp.lean,Mathlib/CategoryTheory/Action.lean,Mathlib/CategoryTheory/Action/Basic.lean,Mathlib/CategoryTheory/Action/Concrete.lean,Mathlib/CategoryTheory/Action/Monoidal.lean,Mathlib/CategoryTheory/Adhesive/Basic.lean,Mathlib/CategoryTheory/Adjunction/Limits.lean,Mathlib/CategoryTheory/Adjunction/Opposites.lean,Mathlib/CategoryTheory/Category/Cat.lean,Mathlib/CategoryTheory/Category/Cat/Adjunction.lean,Mathlib/CategoryTheory/Category/Cat/Limit.lean,Mathlib/CategoryTheory/Category/PartialFun.lean,Mathlib/CategoryTheory/Category/Pointed.lean,Mathlib/CategoryTheory/Category/RelCat.lean,Mathlib/CategoryTheory/CodiscreteCategory.lean,Mathlib/CategoryTheory/CofilteredSystem.lean,Mathlib/CategoryTheory/Comma/Presheaf/Basic.lean,Mathlib/CategoryTheory/ConcreteCategory/Basic.lean,Mathlib/CategoryTheory/ConcreteCategory/Elementwise.lean,Mathlib/CategoryTheory/ConcreteCategory/EpiMono.lean,Mathlib/CategoryTheory/ConcreteCategory/Forget.lean,Mathlib/CategoryTheory/ConcreteCategory/Representable.lean,Mathlib/CategoryTheory/Core.lean,Mathlib/CategoryTheory/Elements.lean,Mathlib/CategoryTheory/Enriched/Basic.lean,Mathlib/CategoryTheory/Extensive.lean,Mathlib/CategoryTheory/Filtered/Basic.lean,Mathlib/CategoryTheory/Filtered/Final.lean,Mathlib/CategoryTheory/Filtered/OfColimitCommutesFiniteLimit.lean,Mathlib/CategoryTheory/FintypeCat.lean,Mathlib/CategoryTheory/Functor/Flat.lean,Mathlib/CategoryTheory/Functor/FunctorHom.lean,Mathlib/CategoryTheory/Functor/Hom.lean,Mathlib/CategoryTheory/Functor/KanExtension/Dense.lean,Mathlib/CategoryTheory/Functor/TypeValuedFlat.lean,Mathlib/CategoryTheory/Galois/Basic.lean 288 1 ['github-actions'] nobody
3-57685
3 days ago
unknown
0-0
0 seconds
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 not finished. * GPT-5.4 was used to refactor the variables. --- - [x] depends on: #34580 - [x] depends on: #34624 - [ ] 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 awaiting-author merge-conflict 380/0 Mathlib.lean,Mathlib/GroupTheory/FinitelyPresentedGroup.lean,Mathlib/GroupTheory/Finiteness.lean 3 31 ['copilot-pull-request-reviewer', 'eric-wieser', 'github-actions', 'homeowmorphism', 'kbuzzard', 'mathlib-dependent-issues', 'mathlib-merge-conflicts', 'tb65536'] nobody
3-56401
3 days ago
51-38852
51 days ago
0-579
9 minutes
36508 homeowmorphism
author:homeowmorphism
 feat(FinitelyPresentedGroup): add FreeGroup instance Add free group instances of finitely presented group and a helpful quotient `def` that says that quotienting a group by the normal closure of the empty set gives back the group. --- - [ ] depends on: #34236 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-group-theory new-contributor blocked-by-other-PR merge-conflict 380/0 Mathlib.lean,Mathlib/GroupTheory/FinitelyPresentedGroup.lean,Mathlib/GroupTheory/Finiteness.lean 3 4 ['github-actions', 'mathlib-dependent-issues', 'mathlib-merge-conflicts'] nobody
3-56267
3 days ago
5-18705
5 days ago
5-18660
5 days
36573 kim-em
author:kim-em
 experiment: `rm_set_option.py` after greedily deploying #35950's `inferInstanceAs%` Removes 769 `set_option backward`s. large-import merge-conflict 994/1295 Archive/Imo/Imo1959Q2.lean,Archive/Imo/Imo1963Q5.lean,Archive/Imo/Imo1982Q3.lean,Archive/Imo/Imo2006Q3.lean,Archive/Wiedijk100Theorems/BuffonsNeedle.lean,Archive/Wiedijk100Theorems/HeronsFormula.lean,Archive/Wiedijk100Theorems/SolutionOfCubicQuartic.lean,Counterexamples/HeawoodUnitDistance.lean,Counterexamples/HomogeneousPrimeNotPrime.lean,Mathlib.lean,Mathlib/Algebra/Algebra/Subalgebra/Basic.lean,Mathlib/Algebra/Algebra/Subalgebra/Lattice.lean,Mathlib/Algebra/Algebra/ZMod.lean,Mathlib/Algebra/Category/AlgCat/Symmetric.lean,Mathlib/Algebra/Category/FGModuleCat/EssentiallySmall.lean,Mathlib/Algebra/Category/Grp/LeftExactFunctor.lean,Mathlib/Algebra/Category/HopfAlgCat/Monoidal.lean,Mathlib/Algebra/Category/ModuleCat/ChangeOfRings.lean,Mathlib/Algebra/Category/ModuleCat/ExteriorPower.lean,Mathlib/Algebra/Category/ModuleCat/Limits.lean,Mathlib/Algebra/Category/ModuleCat/Localization.lean,Mathlib/Algebra/Category/ModuleCat/Monoidal/Basic.lean,Mathlib/Algebra/Category/ModuleCat/Presheaf.lean,Mathlib/Algebra/Category/ModuleCat/Presheaf/ChangeOfRings.lean,Mathlib/Algebra/Category/ModuleCat/Presheaf/EpiMono.lean,Mathlib/Algebra/Category/ModuleCat/Presheaf/Monoidal.lean,Mathlib/Algebra/Category/ModuleCat/Presheaf/Sheafification.lean,Mathlib/Algebra/Category/Ring/Epi.lean,Mathlib/Algebra/Category/Ring/LinearAlgebra.lean,Mathlib/Algebra/Colimit/Module.lean,Mathlib/Algebra/Field/Equiv.lean,Mathlib/Algebra/Field/Subfield/Basic.lean,Mathlib/Algebra/Homology/BifunctorAssociator.lean,Mathlib/Algebra/Homology/CochainComplexPlus.lean,Mathlib/Algebra/Homology/DerivedCategory/Basic.lean,Mathlib/Algebra/Homology/DerivedCategory/ExactFunctor.lean,Mathlib/Algebra/Homology/DerivedCategory/Linear.lean,Mathlib/Algebra/Homology/Embedding/CochainComplex.lean,Mathlib/Algebra/Homology/Embedding/TruncLE.lean,Mathlib/Algebra/Homology/Embedding/TruncLEHomology.lean,Mathlib/Algebra/Homology/Functor.lean,Mathlib/Algebra/Homology/HomotopyCategory/HomComplexCohomology.lean,Mathlib/Algebra/Homology/HomotopyCategory/SingleFunctors.lean,Mathlib/Algebra/Homology/Monoidal.lean,Mathlib/Algebra/Lie/Abelian.lean,Mathlib/Algebra/Lie/Derivation/Basic.lean,Mathlib/Algebra/Lie/Free.lean,Mathlib/Algebra/Lie/LieTheorem.lean,Mathlib/Algebra/Lie/NonUnitalNonAssocAlgebra.lean,Mathlib/Algebra/Lie/Quotient.lean,Mathlib/Algebra/Module/CharacterModule.lean,Mathlib/Algebra/Module/LocalizedModule/Basic.lean,Mathlib/Algebra/Module/LocalizedModule/Submodule.lean,Mathlib/Algebra/Module/Presentation/Finite.lean,Mathlib/Algebra/MvPolynomial/Basic.lean,Mathlib/Algebra/MvPolynomial/Nilpotent.lean,Mathlib/Algebra/Order/Floor/Ring.lean,Mathlib/Algebra/Order/Floor/Semifield.lean,Mathlib/Algebra/Order/Group/Unbundled/Abs.lean,Mathlib/Algebra/Order/Ring/StandardPart.lean,Mathlib/Algebra/Polynomial/Module/AEval.lean,Mathlib/Algebra/Polynomial/Module/Basic.lean,Mathlib/Algebra/Quandle.lean,Mathlib/Algebra/Quaternion.lean,Mathlib/Algebra/Ring/Subring/Basic.lean,Mathlib/Algebra/Star/NonUnitalSubalgebra.lean,Mathlib/Algebra/Star/StarAlgHom.lean,Mathlib/Algebra/Star/Unitary.lean,Mathlib/AlgebraicGeometry/AffineScheme.lean,Mathlib/AlgebraicGeometry/AffineSpace.lean,Mathlib/AlgebraicGeometry/AffineTransitionLimit.lean,Mathlib/AlgebraicGeometry/Artinian.lean,Mathlib/AlgebraicGeometry/FunctionField.lean,Mathlib/AlgebraicGeometry/Geometrically/Basic.lean,Mathlib/AlgebraicGeometry/Gluing.lean,Mathlib/AlgebraicGeometry/Group/Abelian.lean,Mathlib/AlgebraicGeometry/IdealSheaf/Basic.lean,Mathlib/AlgebraicGeometry/IdealSheaf/IrreducibleComponent.lean,Mathlib/AlgebraicGeometry/Limits.lean,Mathlib/AlgebraicGeometry/LimitsOver.lean,Mathlib/AlgebraicGeometry/Modules/Sheaf.lean,Mathlib/AlgebraicGeometry/Modules/Tilde.lean,Mathlib/AlgebraicGeometry/Morphisms/Basic.lean,Mathlib/AlgebraicGeometry/Morphisms/ClosedImmersion.lean,Mathlib/AlgebraicGeometry/Morphisms/Finite.lean,Mathlib/AlgebraicGeometry/Morphisms/FinitePresentation.lean,Mathlib/AlgebraicGeometry/Morphisms/FiniteType.lean,Mathlib/AlgebraicGeometry/Morphisms/Flat.lean,Mathlib/AlgebraicGeometry/Morphisms/FormallyUnramified.lean,Mathlib/AlgebraicGeometry/Morphisms/Immersion.lean,Mathlib/AlgebraicGeometry/Morphisms/Integral.lean,Mathlib/AlgebraicGeometry/Morphisms/IsIso.lean,Mathlib/AlgebraicGeometry/Morphisms/OpenImmersion.lean,Mathlib/AlgebraicGeometry/Morphisms/Proper.lean,Mathlib/AlgebraicGeometry/Morphisms/QuasiFinite.lean,Mathlib/AlgebraicGeometry/Morphisms/RingHomProperties.lean,Mathlib/AlgebraicGeometry/Morphisms/SchemeTheoreticallyDominant.lean,Mathlib/AlgebraicGeometry/Morphisms/Separated.lean,Mathlib/AlgebraicGeometry/Morphisms/UniversallyOpen.lean,Mathlib/AlgebraicGeometry/Noetherian.lean 523 3 ['github-actions', 'mathlib-merge-conflicts'] nobody
3-56266
3 days ago
4-17872
4 days ago
0-169
2 minutes
36575 dagurtomas
author:dagurtomas
 modifications to #35871 --- So this doesn't appear on the queue: - [ ] depends on: #35871 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-category-theory merge-conflict 47/51 Mathlib/AlgebraicGeometry/Morphisms/Finite.lean,Mathlib/AlgebraicGeometry/Morphisms/FlatDescent.lean,Mathlib/CategoryTheory/Limits/Shapes/Pullback/IsPullback/Basic.lean,Mathlib/CategoryTheory/MorphismProperty/Basic.lean,Mathlib/CategoryTheory/MorphismProperty/Limits.lean 5 4 ['github-actions', 'mathlib-dependent-issues', 'mathlib-merge-conflicts'] nobody
3-56264
3 days ago
4-13458
4 days ago
0-11
11 seconds
35643 chrisflav
author:chrisflav
 chore(Algebra): make `TensorProduct.equivOfCompatibleSMul` more linear --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra maintainer-merge
label:t-algebra$
 64/47 Mathlib/LinearAlgebra/TensorProduct/Associator.lean,Mathlib/LinearAlgebra/TensorProduct/Basic.lean,Mathlib/RingTheory/Coalgebra/TensorProduct.lean,Mathlib/RingTheory/LinearDisjoint.lean,Mathlib/RingTheory/Localization/BaseChange.lean,Mathlib/RingTheory/Smooth/Fiber.lean,Mathlib/RingTheory/TensorProduct/Maps.lean,Mathlib/RingTheory/TensorProduct/Nontrivial.lean 8 17 ['chrisflav', 'github-actions', 'kckennylau', 'robin-carlier'] kim-em
assignee:kim-em
3-56107
3 days ago
3-61141
3 days ago
19-3423
19 days
35680 joelriou
author:joelriou
 feat(CategoryTheory/Sites): alternative constructor for points By definition, given a point of a site `(C, J)`, the fiber of a presheaf `P` is defined as a filtered colimit indexed by the opposite category of the category of elements of the functor from `C` to types that is part of the definition of the point. In this PR, we introduce a constructor for points which allows to provide a functor `p : N ⥤ C` from a cofiltered and initially small instead. This construction is applied to the construction of the image of a point by a cocontinuous functor. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-category-theory maintainer-merge 337/0 Mathlib.lean,Mathlib/CategoryTheory/Sites/Point/Basic.lean,Mathlib/CategoryTheory/Sites/Point/Map.lean,Mathlib/CategoryTheory/Sites/Point/OfIsCofiltered.lean 4 16 ['bryangingechen', 'github-actions', 'mathlib-merge-conflicts', 'robin-carlier'] adamtopaz
assignee:adamtopaz
3-55364
3 days ago
3-55404
3 days ago
10-57738
10 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 13/0 Mathlib/Combinatorics/SimpleGraph/Paths.lean,Mathlib/Combinatorics/SimpleGraph/Walks/Operations.lean 2 7 ['Rida-Hamadani', 'SnirBroshi', 'github-actions', 'mathlib-merge-conflicts', 'vlad902'] nobody
3-55348
3 days ago
3-55315
3 days ago
19-67433
19 days
36596 harahu
author:harahu
 chore(Algebra): fix markdown list indentation We replace lazy continuation lines in lists with either: - indented lines, to signify that the line is indeed a continuation line; or - a newline, where the continuation line(s) were in fact intended to be disconnected from the list. We do this because lazy continuation is a markdown footgun that one does well to avoid. We also standardize indentation such that continuation lines now line up with the first line of the item they're continuing. This seems to be the solution enforced by markdown formatters, e.g. `mdformat`. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra
label:t-algebra$
 36/27 Mathlib/Algebra/ContinuedFractions/Basic.lean,Mathlib/Algebra/ContinuedFractions/Computation/CorrectnessTerminating.lean,Mathlib/Algebra/ContinuedFractions/Computation/Translations.lean,Mathlib/Algebra/DirectSum/Finsupp.lean,Mathlib/Algebra/FreeAlgebra.lean,Mathlib/Algebra/Group/Conj.lean,Mathlib/Algebra/Homology/ShortComplex/ExactFunctor.lean,Mathlib/Algebra/Module/FinitePresentation.lean,Mathlib/Algebra/Order/Hom/Basic.lean,Mathlib/Algebra/Polynomial/EraseLead.lean,Mathlib/Algebra/Polynomial/Inductions.lean,Mathlib/Algebra/Polynomial/Laurent.lean 12 1 ['github-actions'] nobody
3-54055
3 days ago
unknown
0-0
0 seconds
36602 yuanyi-350
author:yuanyi-350
 feat(ProbabilityTheory): Add Kolmogorov's two-series theorem - [ ] depends on: #36545 ref: https://en.wikipedia.org/wiki/Kolmogorov%27s_two-series_theorem --- [![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 261/0 Mathlib.lean,Mathlib/Probability/CondVar.lean,Mathlib/Probability/Martingale/Kolmogorov.lean,Mathlib/Probability/Martingale/OptionalStopping.lean 4 2 ['github-actions', 'mathlib-dependent-issues'] nobody
3-53070
3 days ago
3-54118
3 days ago
3-54198
3 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 - [ ] depends on: #36201 - [ ] depends on: #36407 - [x] depends on: #36408 - [ ] depends on: #36416 - [ ] depends on: #36603 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-analysis blocked-by-other-PR 353/0 Mathlib.lean,Mathlib/Analysis/CStarAlgebra/ApproximateUnit.lean,Mathlib/Analysis/CStarAlgebra/ContinuousFunctionalCalculus/Isometric.lean,Mathlib/Analysis/CStarAlgebra/Extreme.lean,Mathlib/Analysis/CStarAlgebra/GelfandDuality.lean,Mathlib/Analysis/Convex/Extreme.lean,Mathlib/Analysis/Convex/Strict/Extreme.lean,Mathlib/Analysis/Convex/StrictConvexSpace.lean,Mathlib/Analysis/Normed/Group/Real.lean,Mathlib/Topology/ContinuousMap/Bounded/Normed.lean,Mathlib/Topology/ContinuousMap/Compact.lean 11 5 ['github-actions', 'j-loreaux', 'mathlib-dependent-issues', 'mathlib-merge-conflicts', 'themathqueen'] nobody
3-53031
3 days ago
9-42655
9 days ago
0-626
10 minutes
36569 homeowmorphism
author:homeowmorphism
 feat(FreeGroup): injection between types induces injection between free groups Adds the theorem that if α and β are arbitrary types and there is a injection between them, then the induced FreeGroup.map is also injective. I accidentally closed the old draft from here: #34996. The reason this is left as a WIP is because I gave it as an exercise to the [MadLean](https://leanprover.zulipchat.com/#narrow/channel/224796-Geographic-locality/topic/Madrid.2C.20Spain/with/326103886) attendees to encourage them to do a first contribution to mathlib. The goal is to PR it next week after the workshop. I will link to the new PR here. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) WIP t-group-theory new-contributor 14/0 Mathlib/GroupTheory/FreeGroup/Basic.lean 1 7 ['copilot-pull-request-reviewer', 'github-actions', 'homeowmorphism', 'mathlib-bors'] nobody
3-51237
3 days ago
4-25432
4 days ago
0-381
6 minutes
36182 joelriou
author:joelriou
 feat(Algebra/Homology/SpectralObject): homology of the differentials --- - [x] depends on: #35374 - [x] depends on: #35375 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra t-category-theory maintainer-merge
label:t-algebra$
 166/0 Mathlib.lean,Mathlib/Algebra/Homology/SpectralObject/Homology.lean 2 48 ['faenuccio', 'github-actions', 'joelriou', 'mathlib-dependent-issues', 'mathlib-merge-conflicts', 'robin-carlier', 'smorel394'] faenuccio
assignee:faenuccio
3-49596
3 days ago
3-49696
3 days ago
4-31267
4 days
36197 RemyDegenne
author:RemyDegenne
 feat: integrability of a convex function of R.N. derivatives For `f` a convex continuous real function, if `f ((μ ⊗ₘ κ).rnDeriv (ν ⊗ₘ η))` is `(ν ⊗ₘ η)`-integrable, then `f (μ.rnDeriv ν)` is `ν`-integrable. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-measure-probability large-import maintainer-merge 146/2 Mathlib/Analysis/Convex/Approximation.lean,Mathlib/MeasureTheory/Measure/Decomposition/IntegralRNDeriv.lean,Mathlib/MeasureTheory/Measure/Decomposition/RadonNikodym.lean 3 12 ['EtienneC30', 'RemyDegenne', 'github-actions'] EtienneC30
assignee:EtienneC30
3-49211
3 days ago
3-73578
3 days ago
8-82696
8 days
35632 SnirBroshi
author:SnirBroshi
 feat(Data/List/TakeDrop): `take`/`drop` + `tail`/`dropLast` almost commute --- [Zulip](https://leanprover.zulipchat.com/#narrow/channel/217875-Is-there-code-for-X.3F/topic/List.2Etail.2FList.2EdropLast.20.2B.20List.2Etake/with/572294698) [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-data 22/0 Mathlib/Data/List/TakeDrop.lean 1 5 ['SnirBroshi', 'github-actions', 'joneugster'] joneugster
assignee:joneugster
3-46915
3 days ago
23-3336
23 days ago
23-4306
23 days
36560 harahu
author:harahu
 doc(FieldTheory): fix typos Found by `PyCharm`'s code inspection tool. Fixes were made by Codex. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra
label:t-algebra$
 15/14 Mathlib/FieldTheory/IntermediateField/Adjoin/Algebra.lean,Mathlib/FieldTheory/Minpoly/MinpolyDiv.lean,Mathlib/FieldTheory/RatFunc/Luroth.lean,Mathlib/FieldTheory/SeparablyGenerated.lean 4 2 ['github-actions', 'vihdzp'] nobody
3-46452
3 days ago
3-46131
3 days ago
0-75550
20 hours
36456 b-mehta
author:b-mehta
 feat(ENat): relate ENat to finset sums and products The names and statements are picked to mimic https://leanprover-community.github.io/mathlib4_docs/Mathlib/Data/ENNReal/BigOperators.html. - [x] depends on: #36454 - [x] depends on: #36452 t-data large-import 75/1 Mathlib/Data/ENat/BigOperators.lean 1 3 ['b-mehta', 'github-actions', 'mathlib-dependent-issues'] nobody
3-46095
3 days ago
3-46158
3 days ago
3-47114
3 days
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
3-44869
3 days ago
12-69791
12 days ago
29-40951
29 days
35865 vihdzp
author:vihdzp
 chore: review `Cardinal.ord` API This PR does the following: - Mark `Cardinal.ord` as no expose. - Prove the defining property `gciOrdCard` earlier. - Deprecate the unused `ord.orderEmbedding` (it simply restates that the function is strictly monotonic). - Rename `ord_nat` → `ord_natCast`. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-set-theory 45/39 Mathlib/SetTheory/Cardinal/Aleph.lean,Mathlib/SetTheory/Cardinal/Cofinality.lean,Mathlib/SetTheory/Ordinal/Arithmetic.lean,Mathlib/SetTheory/Ordinal/Basic.lean 4 2 ['github-actions', 'mathlib-merge-conflicts'] nobody
3-43619
3 days ago
3-43641
3 days ago
13-71179
13 days
36283 Vierkantor
author:Vierkantor
 chore(Tactic/GRewrite): rewrite `grw` family tactic docstrings This PR rewrites the docstrings for tactics in the `grw` family: `grw`, `grewrite`, `apply_rw`, `apply_rewrite`, `nth_rw` and `nth_rewrite`, to consistently match the official style guide, to make sure they are complete while not getting too long. The `grw` tactic docstring was nice and complete, but the others were very brief and needed expansion (especially since it took me quite some time to understand the motivation behind `apply_rw`). --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) documentation t-meta 141/23 Mathlib/Tactic/GRewrite/Elab.lean 1 13 ['JovanGerb', 'Vierkantor', 'github-actions'] adamtopaz
assignee:adamtopaz
3-42892
3 days ago
10-46875
10 days ago
10-46830
10 days
36298 ocfnash
author:ocfnash
 feat: define bases of semisimple Lie algebras and add API --- - [x] depends on: #36297 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra
label:t-algebra$
 569/0 Mathlib.lean,Mathlib/Algebra/Lie/Basis.lean,Mathlib/LinearAlgebra/Basis/Basic.lean 3 2 ['github-actions', 'mathlib-dependent-issues'] nobody
3-39915
3 days ago
3-74735
3 days ago
3-74691
3 days
35568 goliath-klein
author:goliath-klein
 refactor(PiTensorProduct/{InjectiveNorm, ProjectiveNorm}): switch NormedSpace instance to `projectiveSeminorm` The PR switches the `NormedSpace` instance on `PiTensorProduct`s from `injectiveSeminorm` to `projectiveSeminorm` and updates all follow-up results. The signature of `norm_eval_le_projectiveSeminorm` is changed to match the one of `norm_eval_le_injectiveSeminorm`. This is the second 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). --- - [x] depends on: #35567 This series is the result of splitting up #34137. More discussion there. Co-authored-by: Davood H. H. Tehrani [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor 27/29 Mathlib/Analysis/Normed/Module/PiTensorProduct/InjectiveSeminorm.lean,Mathlib/Analysis/Normed/Module/PiTensorProduct/ProjectiveSeminorm.lean 2 5 ['github-actions', 'goliath-klein', 'mathlib-dependent-issues', 'robin-carlier'] robin-carlier
assignee:robin-carlier
3-39642
3 days ago
3-39642
3 days ago
10-45636
10 days
35940 MichaelStollBayreuth
author:MichaelStollBayreuth
 feat(NumberTheory/Height/MvPolynomial): lower height bounds for images under polynomial maps We continue the development of height bounds for polynomial maps. Here we add the lower bound. --- - [x] depends on: #35927 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-number-theory t-algebra
label:t-algebra$
 147/9 Mathlib/Algebra/BigOperators/Finprod.lean,Mathlib/NumberTheory/Height/MvPolynomial.lean 2 10 ['AntoineChambert-Loir', 'MichaelStollBayreuth', 'github-actions', 'mathlib-dependent-issues', 'mathlib-merge-conflicts', 'tb65536'] mariainesdff
assignee:mariainesdff
3-38514
3 days ago
10-44907
10 days ago
10-47559
10 days
36603 themathqueen
author:themathqueen
 feat(Analysis/Convex/Strict/Extreme): `extremePoints ℝ (Icc a b) = {a, b}` Also provide `StrictConvexSpace ℝ ℝ` instance without needing to invoke the inner product space. Co-authored-by: Jireh Loreaux --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-analysis easy 15/0 Mathlib/Analysis/Convex/Extreme.lean,Mathlib/Analysis/Convex/Strict/Extreme.lean,Mathlib/Analysis/Convex/StrictConvexSpace.lean,Mathlib/Analysis/Normed/Group/Real.lean 4 1 ['github-actions'] nobody
3-37001
3 days ago
3-53312
3 days ago
3-53267
3 days
36617 j-loreaux
author:j-loreaux
 feat: add `IsSemitopologicalRing` With the recent addition of the class `SeparatelyContinuousMul`, it becomes possible to define `IsSemitopologicalRing` (and a version for semirings). A *semitopological ring* is a ring with jointly continuous addition and separately continuous multiplication (and continuous negation, but this is implied by the other two). Such structures arise quite frequently in functional analysis. This PR defines these classes and then generalizes a number of things in the library. For example, the topological closures of ring-like structures only need multiplication to be separately continuous (they also only need addition to be separately continuous, but ring-like structures for which addition is separately but not jointly continuous do not generally arise in practice). In addition, this allows us to weaken the conditions of instances pertaining to `ContinuousMap.UniqueHom` and `ContinuousMapZero.UniqueHom` which are used in the continuous functional calculus. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-topology t-algebra
label:t-algebra$
 241/102 Mathlib/Analysis/CStarAlgebra/ContinuousFunctionalCalculus/Commute.lean,Mathlib/Analysis/CStarAlgebra/ContinuousFunctionalCalculus/Continuity.lean,Mathlib/Analysis/CStarAlgebra/ContinuousFunctionalCalculus/Instances.lean,Mathlib/Analysis/CStarAlgebra/ContinuousFunctionalCalculus/Unique.lean,Mathlib/Analysis/SpecialFunctions/ContinuousFunctionalCalculus/ExpLog/Basic.lean,Mathlib/Analysis/SpecialFunctions/ContinuousFunctionalCalculus/PosPart/Basic.lean,Mathlib/Analysis/SpecialFunctions/ContinuousFunctionalCalculus/Rpow/Basic.lean,Mathlib/Topology/Algebra/Algebra.lean,Mathlib/Topology/Algebra/NonUnitalAlgebra.lean,Mathlib/Topology/Algebra/NonUnitalStarAlgebra.lean,Mathlib/Topology/Algebra/Ring/Basic.lean,Mathlib/Topology/Algebra/StarSubalgebra.lean 12 1 ['github-actions'] nobody
3-35387
3 days ago
3-35458
3 days ago
3-35413
3 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 awaiting-CI merge-conflict 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/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/PathConnected.lean,Mathlib/Analysis/Convex/Side.lean,Mathlib/Analysis/Convex/StdSimplex.lean,Mathlib/Analysis/Convolution.lean,Mathlib/Analysis/InnerProductSpace/LinearPMap.lean,Mathlib/Analysis/InnerProductSpace/MeanErgodic.lean,Mathlib/Analysis/InnerProductSpace/OfNorm.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/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/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,Mathlib/NumberTheory/Modular.lean,Mathlib/NumberTheory/ModularForms/Bounds.lean,Mathlib/NumberTheory/ModularForms/JacobiTheta/TwoVariable.lean,Mathlib/NumberTheory/NumberField/CanonicalEmbedding/NormLeOne.lean,Mathlib/NumberTheory/Padics/PadicIntegers.lean,Mathlib/NumberTheory/ZetaValues.lean 180 12 ['github-actions', 'j-loreaux', 'mathlib-bors', 'mathlib-merge-conflicts', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
3-34538
3 days ago
123-27393
123 days ago
0-1
1 second
36485 Paul-Lez
author:Paul-Lez
 feat(Data/Finset/Finite): `Finset.sigma` commutes with `Finset.filter` Not so sure about the `simp` tag - reviewer feedback welcome on that:) --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-data easy awaiting-author 7/0 Mathlib/Data/Finset/Sigma.lean 1 6 ['Paul-Lez', 'eric-wieser', 'github-actions'] nobody
3-31877
3 days ago
5-8285
5 days ago
0-47312
13 hours
36553 j-loreaux
author:j-loreaux
 feat: add IsMulCommutative instances for directed families of commutative subobjects --- - [ ] depends on: #36549 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra blocked-by-other-PR merge-conflict
label:t-algebra$
 831/114 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/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/NonUnitalSubsemiring/Basic.lean 40 3 ['github-actions', 'mathlib-dependent-issues', 'mathlib-merge-conflicts'] nobody
3-27354
3 days ago
4-38645
4 days ago
0-204
3 minutes
34138 pfaffelh
author:pfaffelh
 feat(MeasureTheory): Introduce `MassFunction α` giving rise to a `Measure α ⊤` Define `MassFunction α := α → ℝ≥0∞` Define `toMeasure (w : MassFunction α) : @Measure α ⊤` as a sum of diracs Show properties of the resulting objects This PR intends to start a more userfriendly interaction with probability mass functions (`PMF`). There are two main differences between `MassFunction` and `PMF`: * `PMF` hast the additional property `HasSum 1`, making the resulting measure a probability measure. (For `MassFunction`, I intend to use the typeclass `IsProbabilityMeasure`in a later PR instead.) * The `toMeasure` function of `MassFunction` directly 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) --- [![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/MassFunction.lean 4 11 ['DavidLedvinka', 'github-actions', 'metakunt', 'pfaffelh'] kex-y and ocfnash
assignee:ocfnash assignee:kex-y
3-25756
3 days ago
14-29965
14 days ago
56-35666
56 days
35535 mariainesdff
author:mariainesdff
 feat(RingTheory/ClassGroup): prove mulEquiv We prove that isomorphic rings have isomorphic class groups. Co-authored by: @xgenereux. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-ring-theory 233/9 Mathlib/Algebra/Ring/CompTypeclasses.lean,Mathlib/RingTheory/ClassGroup.lean,Mathlib/RingTheory/FractionalIdeal/Operations.lean,Mathlib/RingTheory/IntegralClosure/IsIntegral/Basic.lean,Mathlib/RingTheory/LocalProperties/Basic.lean,Mathlib/RingTheory/Localization/FractionRing.lean 6 29 ['erdOne', 'eric-wieser', 'github-actions', 'mariainesdff', 'mathlib-merge-conflicts', 'tb65536'] mattrobball
assignee:mattrobball
3-18778
3 days ago
10-54518
10 days ago
18-12568
18 days
35771 euprunin
author:euprunin
 chore: golf using `exact` The goal of this PR is to decrease the number of times lemmas are called explicitly (replacing calls to lemmas with calls to tactics). 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): * `IsBaseChange.comp`: 132 ms before, 98 ms after 🎉 * `Cardinal.powerlt_aleph0`: unchanged 🎉 * `ONote.fastGrowing_one`: unchanged 🎉 Profiled using `set_option trace.profiler true in`. This PR is batched under the following guidelines: * Up to ~5 changed files per PR * Up to ~25 changed declarations per PR * Up to ~100 changed lines per PR --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) 3/11 Mathlib/RingTheory/IsTensorProduct.lean,Mathlib/SetTheory/Cardinal/Arithmetic.lean,Mathlib/SetTheory/Ordinal/Notation.lean 3 1 ['github-actions', 'vihdzp'] robin-carlier
assignee:robin-carlier
3-18774
3 days ago
19-48333
19 days ago
19-48288
19 days
36243 Hagb
author:Hagb
 feat(Data/Finsupp/Order): `{emb,map}Domain` preserve pairwise order `embDomain`, and thus also `mapDomain` by an injective map, preserve pairwise order. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-data 39/0 Mathlib/Data/Finsupp/Order.lean 1 1 ['github-actions'] joneugster
assignee:joneugster
3-18771
3 days ago
11-6001
11 days ago
11-5956
11 days
36319 themathqueen
author:themathqueen
 feat(Analysis/CStarAlgebra/Unitary): left multiplication by a unitary as a linear isometric equivalence Co-authored-by: Jon Bannon <59937998+JonBannon@users.noreply.github.com> --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-analysis 171/0 Mathlib.lean,Mathlib/Algebra/Module/Equiv/Basic.lean,Mathlib/Analysis/CStarAlgebra/Unitary/Maps.lean 3 5 ['github-actions', 'j-loreaux', 'themathqueen'] j-loreaux
assignee:j-loreaux
3-18768
3 days ago
6-24993
6 days ago
9-55248
9 days
36329 rwst
author:rwst
 feat(PowerSeries): add barebones Log.lean --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-ring-theory 67/0 Mathlib.lean,Mathlib/RingTheory/PowerSeries/Log.lean 2 1 ['github-actions'] mariainesdff
assignee:mariainesdff
3-18767
3 days ago
9-41178
9 days ago
9-41133
9 days
36374 EtienneC30
author:EtienneC30
 refactor: define the Poisson measure via a sum of Dirac masses Change the definition of `poissonMeasure r` to be `Measure.sum (fun n ↦ ENNReal.ofReal (exp (-r) * r ^ n / (n)!) • (.dirac n))` instead of using `PMF`. This allows to directly use API for measures instead of having to develop an API for `PMF`, which anyway is defined as a sum of Dirac masses. Also add some results about integrals against the poissonMeasure. --- - [x] depends on: #36355 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-measure-probability large-import 105/30 Mathlib/MeasureTheory/Measure/Dirac.lean,Mathlib/Probability/Distributions/Poisson/Basic.lean,Mathlib/Probability/Distributions/Poisson/PoissonLimitThm.lean 3 11 ['DavidLedvinka', 'EtienneC30', 'b-mehta', 'github-actions', 'mathlib-dependent-issues'] kex-y
assignee:kex-y
3-18765
3 days ago
7-43383
7 days ago
7-57371
7 days
36378 EtienneC30
author:EtienneC30
 refactor: define the geometric distribution via a sum of Dirac masses Change the definition of `geometricMeasure p` to be `Measure.sum (fun n ↦ ENNReal.ofReal ((1 - p) ^ n * p)) • (.dirac n))` instead of using `PMF`. This allows to directly use API for measures instead of having to develop an API for `PMF`, which anyway is defined as a sum of Dirac masses. Also add some results about integrals against the geometricMeasure. --- - [x] depends on: #36355 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-measure-probability large-import 135/25 Mathlib/MeasureTheory/Measure/Dirac.lean,Mathlib/Probability/Distributions/Geometric.lean 2 17 ['DavidLedvinka', 'EtienneC30', 'b-mehta', 'github-actions', 'mathlib-dependent-issues'] RemyDegenne
assignee:RemyDegenne
3-18763
3 days ago
7-57250
7 days ago
7-57220
7 days
36389 Thmoas-Guan
author:Thmoas-Guan
 feat(RingTheory): add some lemma about quotSMulTop Add some lemma about quotSMulTop, especially some usual application of Nakayama lemma in related stuffs. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-ring-theory 26/0 Mathlib/RingTheory/QuotSMulTop.lean,Mathlib/RingTheory/Regular/RegularSequence.lean 2 1 ['github-actions'] riccardobrasca
assignee:riccardobrasca
3-18761
3 days ago
7-85314
7 days ago
7-85269
7 days
36401 JovanGerb
author:JovanGerb
 feat(positivity): positivity extension for `a - b` This PR adds support in `positivity` for proving things about subtraction. For example, if the goal is `0 < a - b`, and there is a local hypothesis of type `b < a`, then we close the goal. The motivation is that we want `positivity` to be a flexible tactic. So, when trying to prove `0 < a - b` using a local hypothesis, we should look for the simp normal form of this, which is `b < a`. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-meta 61/24 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/SpecialFunctions/Log/Deriv.lean,Mathlib/Analysis/SpecificLimits/FloorPow.lean,Mathlib/Geometry/Manifold/Riemannian/PathELength.lean,Mathlib/Tactic/Positivity/Basic.lean,MathlibTest/positivity.lean 10 4 ['github-actions', 'hrmacbeth', 'j-loreaux', 'leanprover-radar'] dwrensha
assignee:dwrensha
3-18759
3 days ago
7-24480
7 days ago
7-27857
7 days
36415 j-loreaux
author:j-loreaux
 feat: interactions of the continuous functional calculus with the real and imaginary parts --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-analysis 180/0 Mathlib.lean,Mathlib/Analysis/CStarAlgebra/ContinuousFunctionalCalculus/RealImaginaryPart.lean 2 2 ['github-actions', 'themathqueen'] ADedecker
assignee:ADedecker
3-18758
3 days ago
7-7066
7 days ago
7-7127
7 days
36435 grunweg
author:grunweg
 feat: transfer IsTopologicalAddGroup and ContinuousSMul across continuous linear equivalences and use this to remove mathematically superfluous typeclass hypotheses in the tensoriality criterion. Follow-up to #36277/#36432. --- - [x] depends on: #36432 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-differential-geometry 67/8 Mathlib/Geometry/Manifold/VectorBundle/Tensoriality.lean,Mathlib/Topology/Algebra/Module/TransferInstance.lean 2 6 ['ADedecker', 'github-actions', 'grunweg', 'mathlib-dependent-issues', 'plp127'] PatrickMassot
assignee:PatrickMassot
3-18756
3 days ago
6-64803
6 days ago
6-65420
6 days
36441 mariainesdff
author:mariainesdff
 feat(Data/Finsupp/Indicator): add lemmas Co-authored by : @AntoineChambert-Loir --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-data 22/1 Mathlib/Data/Finsupp/Indicator.lean 1 1 ['github-actions'] joneugster
assignee:joneugster
3-18754
3 days ago
6-54970
6 days ago
6-54925
6 days
36618 SnirBroshi
author:SnirBroshi
 feat(Order/RelClasses): `IsTrans` is redundant in `IsWellOrder` --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-order 13/14 Mathlib/Order/RelClasses.lean,Mathlib/SetTheory/ZFC/Ordinal.lean 2 1 ['github-actions', 'vihdzp'] nobody
3-18636
3 days ago
3-18698
3 days ago
3-21756
3 days
35705 jdhart81
author:jdhart81
 feat(Data/ENNReal, Probability/Independence): division decomposition and self-independence Two general-purpose lemmas extracted from a formal verification of "The Intelligence Bound" (Hart 2025). --- ### New lemmas - `ENNReal.div_eq_div_mul_div`: Division decomposition `a / c = a / b * (b / c)` when `b ≠ 0` and `b ≠ ⊤`. Added to `Mathlib.Data.ENNReal.Inv`. - `IndepFun.of_self`: If `Y` is independent of itself under a probability measure, then `X` and `Y` are independent. Self-independence implies `Y` is a.e. constant. Added to `Mathlib.Probability.Independence.Basic`. ### Context These lemmas arose in formalizing information-theoretic results where: - The ENNReal division identity is needed for decomposing rate expressions (limsup of ratios) - The self-independence result bridges entropy = 0 and measure-theoretic independence ### References - Formal verification: https://github.com/jdhart81/intelligence-bound-lean - Paper: "The Intelligence Bound" (Hart 2025) new-contributor t-measure-probability awaiting-author 47/0 Mathlib/Data/ENNReal/Inv.lean,Mathlib/Probability/Independence/Basic.lean 2 15 ['SnirBroshi', 'github-actions', 'jdhart81', 'joneugster', 'kbuzzard'] nobody
3-18258
3 days ago
18-53664
18 days ago
20-23621
20 days
36612 JovanGerb
author:JovanGerb
 chore(Order/SuccPred/Basic): use `to_dual` more When this file was originally tagged with `to_dual`, the attribute was less capable. Now, we can tag almost everything in the file. This PR does the first half of the remaining tagging. The rest can be done in a future PR. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-order 35/150 Mathlib/Order/SuccPred/Basic.lean 1 1 ['github-actions', 'vihdzp'] nobody
3-18076
3 days ago
3-38048
3 days ago
3-38003
3 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 30/0 Mathlib/Order/UpperLower/Basic.lean 1 6 ['SnirBroshi', 'github-actions', 'vihdzp'] nobody
3-13163
3 days ago
3-18756
3 days ago
3-18711
3 days
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). --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) awaiting-bench t-logic WIP 59/13 Mathlib/Algebra/Order/Antidiag/Prod.lean,Mathlib/Combinatorics/SimpleGraph/Basic.lean,Mathlib/Combinatorics/SimpleGraph/Subgraph.lean,Mathlib/Data/Finset/Prod.lean,Mathlib/Data/Set/Insert.lean,Mathlib/Geometry/Manifold/LocalInvariantProperties.lean,Mathlib/GroupTheory/Perm/Cycle/Factors.lean,Mathlib/Logic/Basic.lean,Mathlib/Logic/Equiv/Defs.lean,Mathlib/NumberTheory/Padics/PadicNumbers.lean,Mathlib/Order/Lattice.lean,Mathlib/SetTheory/Descriptive/Tree.lean,Mathlib/Topology/Homeomorph/Defs.lean 13 2 ['github-actions'] nobody
2-83125
2 days ago
4-57865
4 days ago
0-111
1 minute
35615 SnirBroshi
author:SnirBroshi
 feat(Combinatorics/SimpleGraph/Maps): lemmas about support --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-combinatorics awaiting-author 41/0 Mathlib/Combinatorics/SimpleGraph/Basic.lean,Mathlib/Combinatorics/SimpleGraph/Maps.lean 2 4 ['YaelDillies', 'github-actions'] YaelDillies
assignee:YaelDillies
2-81590
2 days ago
23-23351
23 days ago
23-23306
23 days
30001 vihdzp
author:vihdzp
 feat: concept generated by set of objects/attributes --- - [x] depends on: #29996 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-order awaiting-author 99/0 Mathlib/Order/Concept.lean 1 11 ['YaelDillies', 'github-actions', 'mathlib-dependent-issues', 'mathlib-merge-conflicts', 'mathlib4-merge-conflict-bot', 'vihdzp'] nobody
2-81147
2 days ago
3-39263
3 days ago
0-9730
2 hours
26966 vihdzp
author:vihdzp
 feat: the Dedekind–MacNeille completion We define the type of Dedekind cuts `DedekindCut α` as an abbreviation for `Concept α α (· ≤ ·)`. We prove that it's the smallest complete lattice containing a given partial order, in the sense that any embedding from `α` into a complete lattice factors through it. --- The idea here is that one should be able to work with Dedekind cuts without knowing what a concept lattice is; whence the abbreviation. See [Zulip](https://leanprover.zulipchat.com/#narrow/channel/116395-maths/topic/Dedekind-MacNeille.20completion.2E/near/528004148). - [ ] depends on: #30001 - [x] depends on: #29995 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) blocked-by-other-PR t-order awaiting-author 332/5 Mathlib.lean,Mathlib/Order/Completion.lean,Mathlib/Order/Concept.lean 3 30 ['YaelDillies', 'github-actions', 'leanprover-community-bot-assistant', 'linesthatinterlace', 'mathlib-merge-conflicts', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot', 'vihdzp'] nobody
2-81099
2 days ago
171-65173
171 days ago
0-19769
5 hours
35616 SnirBroshi
author:SnirBroshi
 feat(Combinatorics/SimpleGraph/Copy): `IsContained` and `IsIndContained` are preorders This makes `calc` work and provides `Std.Refl` and `IsTrans` instances. `grw` still doesn't work and mixing the two predicates in `calc` (to prove `IsContained`) also doesn't work. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-combinatorics maintainer-merge 20/0 Mathlib/Combinatorics/SimpleGraph/Copy.lean 1 2 ['YaelDillies', 'github-actions'] YaelDillies
assignee:YaelDillies
2-80963
2 days ago
23-22485
23 days ago
23-22440
23 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 942/575 Mathlib/Algebra/ContinuedFractions/Basic.lean,Mathlib/Algebra/ContinuedFractions/Computation/CorrectnessTerminating.lean,Mathlib/Algebra/ContinuedFractions/Computation/Translations.lean,Mathlib/Algebra/DirectSum/Finsupp.lean,Mathlib/Algebra/FreeAlgebra.lean,Mathlib/Algebra/Group/Conj.lean,Mathlib/Algebra/Homology/ShortComplex/ExactFunctor.lean,Mathlib/Algebra/Module/FinitePresentation.lean,Mathlib/Algebra/Order/Hom/Basic.lean,Mathlib/Algebra/Polynomial/EraseLead.lean,Mathlib/Algebra/Polynomial/Inductions.lean,Mathlib/Algebra/Polynomial/Laurent.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/AnodyneExtensions/Pairing.lean,Mathlib/AlgebraicTopology/SimplicialSet/CompStruct.lean,Mathlib/Analysis/CStarAlgebra/Module/Constructions.lean,Mathlib/Analysis/Complex/Hadamard.lean,Mathlib/Analysis/Convex/KreinMilman.lean,Mathlib/Analysis/Normed/Group/SemiNormedGrp/Completion.lean,Mathlib/CategoryTheory/Bicategory/Basic.lean,Mathlib/CategoryTheory/Category/ULift.lean,Mathlib/CategoryTheory/Filtered/Basic.lean,Mathlib/CategoryTheory/Monoidal/Category.lean,Mathlib/CategoryTheory/Monoidal/Functor.lean,Mathlib/CategoryTheory/Monoidal/Limits/Basic.lean,Mathlib/CategoryTheory/NatIso.lean,Mathlib/CategoryTheory/Sites/Coverage.lean,Mathlib/CategoryTheory/Sites/PrecoverageToGrothendieck.lean,Mathlib/CategoryTheory/WithTerminal/Basic.lean,Mathlib/Combinatorics/Configuration.lean,Mathlib/Combinatorics/HalesJewett.lean,Mathlib/Combinatorics/SimpleGraph/Connectivity/WalkCounting.lean,Mathlib/Combinatorics/SimpleGraph/Regularity/Lemma.lean,Mathlib/Data/Bracket.lean,Mathlib/Data/Fin/Basic.lean,Mathlib/Data/Fin/FlagRange.lean,Mathlib/Data/Finset/Density.lean,Mathlib/Data/Finsupp/MonomialOrder.lean,Mathlib/Data/Finsupp/MonomialOrder/DegLex.lean,Mathlib/Data/Multiset/DershowitzManna.lean,Mathlib/Data/NNRat/Defs.lean,Mathlib/Data/PNat/Xgcd.lean,Mathlib/Data/Part.lean,Mathlib/Data/Stream/Defs.lean,Mathlib/Dynamics/TopologicalEntropy/CoverEntropy.lean,Mathlib/Dynamics/TopologicalEntropy/DynamicalEntourage.lean,Mathlib/Dynamics/TopologicalEntropy/NetEntropy.lean,Mathlib/Dynamics/TopologicalEntropy/Semiconj.lean,Mathlib/Dynamics/TopologicalEntropy/Subset.lean,Mathlib/FieldTheory/CardinalEmb.lean,Mathlib/FieldTheory/Finite/Basic.lean,Mathlib/FieldTheory/Finite/Extension.lean,Mathlib/FieldTheory/Fixed.lean,Mathlib/FieldTheory/IsAlgClosed/Basic.lean,Mathlib/FieldTheory/KummerExtension.lean,Mathlib/FieldTheory/PolynomialGaloisGroup.lean,Mathlib/FieldTheory/RatFunc/Basic.lean,Mathlib/FieldTheory/SeparablyGenerated.lean,Mathlib/Lean/Meta/RefinedDiscrTree/Basic.lean,Mathlib/LinearAlgebra/InvariantBasisNumber.lean,Mathlib/LinearAlgebra/PerfectPairing/Basic.lean,Mathlib/LinearAlgebra/TensorAlgebra/Basic.lean,Mathlib/Logic/Equiv/Fin/Rotate.lean,Mathlib/MeasureTheory/Function/AEEqOfIntegral.lean,Mathlib/MeasureTheory/Function/AbsolutelyContinuous.lean,Mathlib/MeasureTheory/Integral/Bochner/Basic.lean,Mathlib/MeasureTheory/Integral/Bochner/L1.lean,Mathlib/MeasureTheory/Integral/IntervalIntegral/AbsolutelyContinuousFun.lean,Mathlib/MeasureTheory/Integral/SetToL1.lean,Mathlib/MeasureTheory/Measure/MeasureSpaceDef.lean,Mathlib/MeasureTheory/Measure/Regular.lean,Mathlib/MeasureTheory/Measure/WithDensity.lean,Mathlib/MeasureTheory/Order/UpperLower.lean,Mathlib/ModelTheory/Arithmetic/Presburger/Semilinear/Basic.lean,Mathlib/NumberTheory/EllipticDivisibilitySequence.lean,Mathlib/NumberTheory/KummerDedekind.lean,Mathlib/NumberTheory/ModularForms/EisensteinSeries/E2/Transform.lean,Mathlib/NumberTheory/NumberField/CanonicalEmbedding/NormLeOne.lean,Mathlib/NumberTheory/NumberField/FractionalIdeal.lean,Mathlib/NumberTheory/RamificationInertia/Basic.lean,Mathlib/Order/Birkhoff.lean,Mathlib/Order/Circular.lean,Mathlib/Order/CompleteBooleanAlgebra.lean,Mathlib/Order/Defs/LinearOrder.lean,Mathlib/Order/Filter/Defs.lean,Mathlib/Order/Filter/Map.lean,Mathlib/Order/Filter/Partial.lean,Mathlib/Order/Interval/Finset/Defs.lean,Mathlib/Order/Zorn.lean,Mathlib/Probability/Independence/InfinitePi.lean,Mathlib/Probability/Notation.lean,Mathlib/Probability/Process/Filtration.lean,Mathlib/Probability/StrongLaw.lean,Mathlib/RingTheory/DividedPowers/Basic.lean 147 9 ['github-actions', 'harahu', 'mathlib-merge-conflicts'] nobody
2-76337
2 days ago
unknown
0-0
0 seconds
36597 kebekus
author:kebekus
 feat: add lemmas on (fin)sums and (fin)products of meromorphic functions Add a host of missing lemmas on (fin)sums and (fin)products of meromorphic functions, and weaken assumptions in existing lemmas. This material is used in [Project VD](https://github.com/kebekus/ProjectVD), formalizing Value Distribution Theory for meromorphic functions on the complex plane. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-analysis 247/61 Mathlib/Analysis/Complex/ValueDistribution/CharacteristicFunction.lean,Mathlib/Analysis/Complex/ValueDistribution/LogCounting/Basic.lean,Mathlib/Analysis/Complex/ValueDistribution/Proximity/Basic.lean,Mathlib/Analysis/Meromorphic/Basic.lean,Mathlib/Analysis/Meromorphic/Divisor.lean,Mathlib/Analysis/Meromorphic/NormalForm.lean,Mathlib/Analysis/Meromorphic/Order.lean,Mathlib/Analysis/Meromorphic/TrailingCoefficient.lean 8 1 ['github-actions'] nobody
2-76215
2 days ago
3-48882
3 days ago
3-48837
3 days
35675 Thmoas-Guan
author:Thmoas-Guan
 feat(RingTheory/Smooth): some lemma about formally smooth This PR mainly formalized the result [[Stacks 031L](https://stacks.math.columbia.edu/tag/031L)] This is a preliminary of Cohen Structure Theorem. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-ring-theory 257/0 Mathlib.lean,Mathlib/RingTheory/Smooth/Quotient.lean,Mathlib/RingTheory/TensorProduct/Quotient.lean 3 14 ['Thmoas-Guan', 'github-actions', 'jcommelin'] jcommelin
assignee:jcommelin
2-76017
2 days ago
13-55919
13 days ago
21-50686
21 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
2-75803
2 days ago
unknown
0-0
0 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 - [ ] depends on: #36285 - [ ] depends on: #36299 [![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 6006/19 Mathlib.lean,Mathlib/Geometry/Manifold/CheatSheet.md,Mathlib/Geometry/Manifold/IsManifold/Basic.lean,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/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/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/Torsion.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/SmoothSection.lean,Mathlib/Geometry/Manifold/VectorBundle/Tensoriality.lean,Mathlib/Geometry/Manifold/VectorBundle/Unused.lean,Mathlib/Geometry/Manifold/VectorField/LieBracket.lean 28 4 ['github-actions', 'mathlib-dependent-issues', 'mathlib-merge-conflicts'] nobody
2-74415
2 days ago
13-72572
13 days ago
0-7
7 seconds
36471 eric-wieser
author:eric-wieser
 feat: more API for Function.IsPartialInv This also renames some lemmas to enable dot notation. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-logic maintainer-merge 33/22 Mathlib/Data/Set/Finite/Basic.lean,Mathlib/Logic/Encodable/Basic.lean,Mathlib/Logic/Function/Basic.lean 3 13 ['Komyyy', 'eric-wieser', 'github-actions'] nobody
2-73520
2 days ago
4-18720
4 days ago
5-23045
5 days
36509 euprunin
author:euprunin
 chore: golf using `fin_omega`, `simp_all` and `grind +splitIndPred` 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): * `Fin.lt_sub_iff`: 46 ms before, <30 ms after 🎉 * `ArchimedeanClass.add_left_cancel_of_ne_top`: 134 ms before, <30 ms after 🎉 * `exists_seq_of_forall_finset_exists'`: <30 ms before, 53 ms after * `Filter.hasBasis_biInf_of_directed'`: unchanged 🎉 * `Filter.hasBasis_biInf_of_directed`: <30 ms before, 53 ms after Profiled using `set_option trace.profiler true in`. This PR is batched under the following guidelines: * Up to ~5 changed files per PR * Up to ~25 changed declarations per PR * Up to ~100 changed lines per PR --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) 6/48 Mathlib/Algebra/Group/Fin/Basic.lean,Mathlib/Algebra/Order/Ring/Archimedean.lean,Mathlib/Data/Fintype/Basic.lean,Mathlib/Geometry/Manifold/Immersion.lean,Mathlib/Order/Filter/Bases/Basic.lean 5 4 ['euprunin', 'github-actions', 'j-loreaux'] nobody
2-63887
2 days ago
5-16813
5 days ago
5-16768
5 days
36638 CoolRmal
author:CoolRmal
 feat: if `f` lies in a closed convex set `s` almost everywhere, then its conditional expectation also lies in `s` almost everywhere --- - [ ] depends on: #27953 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) blocked-by-other-PR 350/22 Mathlib.lean,Mathlib/Algebra/Notation/Pi/Defs.lean,Mathlib/Analysis/Convex/Approximation.lean,Mathlib/MeasureTheory/Function/ConditionalExpectation/CondJensen.lean,Mathlib/MeasureTheory/MeasurableSpace/Constructions.lean,Mathlib/MeasureTheory/Measure/Restrict.lean,Mathlib/MeasureTheory/Measure/Typeclasses/SFinite.lean,Mathlib/Topology/Semicontinuity/Basic.lean 8 3 ['github-actions', 'mathlib-dependent-issues'] nobody
2-62857
2 days ago
2-64491
2 days ago
0-406
6 minutes
36605 martinwintermath
author:martinwintermath
 feat(Geometry/Convex/Cone): Add linear span for cones and lemmas about interaction between span and negation This PR introduces `linSpan` (linear span) as a short form of `Submodule.span` in the context of cones. This abbreviation allows for shorter, easier to parse lemma statement as well as more descriptive lemma names. This PR also introduces lemmas about the interaction of cone span, linear span and negation. This demonstrates the usefulness of `linSpan`. Co-authored-by: Olivia Röhrig, Kilian Rueß --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) 86/0 Mathlib/Geometry/Convex/Cone/Pointed.lean 1 1 ['github-actions'] nobody
2-61948
2 days ago
3-40164
3 days ago
3-41141
3 days
35360 vlad902
author:vlad902
 chore: rename `cycleGraph_EulerianCircuit` to `cycleGraph.cycle` Per [this](https://github.com/leanprover-community/mathlib4/pull/34797#discussion_r2807963752) review feedback, this definition is inappropriately named with an underscore and should be renamed. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-combinatorics maintainer-merge 21/17 Mathlib/Combinatorics/SimpleGraph/Circulant.lean,Mathlib/Combinatorics/SimpleGraph/ConcreteColorings.lean 2 6 ['YaelDillies', 'github-actions', 'vlad902'] YaelDillies
assignee:YaelDillies
2-61283
2 days ago
2-80925
2 days ago
29-7255
29 days
36642 tb65536
author:tb65536
 feat(NumberTheory/ArithmeticFunction/LFunction): arithmetic functions from power series This PR constructs arithmetic functions from power series. See #36189 for how this will ultimately be used to construct L-functions. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-number-theory t-algebra
label:t-algebra$
 132/0 Mathlib.lean,Mathlib/NumberTheory/ArithmeticFunction/Defs.lean,Mathlib/NumberTheory/ArithmeticFunction/LFunction.lean 3 1 ['github-actions'] nobody
2-59443
2 days ago
2-58853
2 days ago
2-58835
2 days
36189 tb65536
author:tb65536
 feat(NumberTheory/ArithmeticFunction/LFunction): construction of L-functions --- - [ ] depends on: #35709 - [ ] depends on: #35710 - [x] depends on: #36176 - [ ] depends on: #36192 - [x] depends on: #36190 - [x] depends on: #36200 - [ ] depends on: #36433 - [ ] depends on: #36642 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-number-theory t-algebra blocked-by-other-PR
label:t-algebra$
 571/0 Mathlib.lean,Mathlib/AlgebraicGeometry/EllipticCurve/LFunction.lean,Mathlib/AlgebraicGeometry/EllipticCurve/Reduction.lean,Mathlib/NumberTheory/ArithmeticFunction/LFunction.lean,Mathlib/Tactic/Linter/DirectoryDependency.lean 5 5 ['Multramate', 'github-actions', 'mathlib-dependent-issues', 'mathlib-merge-conflicts', 'tb65536'] nobody
2-59217
2 days ago
11-66157
11 days ago
0-1
1 second
34797 vlad902
author:vlad902
 feat(SimpleGraph): `cycleGraph.cycle` is a cycle (A follow-up PR will show that `cycleGraph.cycle` is also hamiltonian.) --- - [ ] depends on: #35360 - [x] depends on: #34766 - [x] depends on: #34796 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-combinatorics blocked-by-other-PR 52/17 Mathlib/Combinatorics/SimpleGraph/Circulant.lean,Mathlib/Combinatorics/SimpleGraph/ConcreteColorings.lean 2 7 ['Ruben-VandeVelde', 'github-actions', 'mathlib-dependent-issues', 'vlad902'] nobody
2-55849
2 days ago
8-75849
8 days ago
1-28919
1 day
35842 WenrongZou
author:WenrongZou
 feat(MvPowerSeries): subst_C and omit some finiteness of index set --- I add some elementary lemma related to substitution of multi variate power series and omit some finiteness of index set (for example in `map_subst` and `HasSubst.X_pow`). [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-ring-theory merge-conflict awaiting-author 77/23 Mathlib/Data/Finsupp/Basic.lean,Mathlib/RingTheory/MvPowerSeries/Expand.lean,Mathlib/RingTheory/MvPowerSeries/Substitution.lean,Mathlib/RingTheory/PowerSeries/Expand.lean,Mathlib/RingTheory/PowerSeries/Substitution.lean 5 12 ['WenrongZou', 'chrisflav', 'github-actions', 'mariainesdff', 'mathlib-merge-conflicts'] chrisflav
assignee:chrisflav
2-54838
2 days ago
10-67971
10 days ago
17-18300
17 days
35510 chrisflav
author:chrisflav
 feat(RingTheory): weakly étale algebras From Proetale. --- - [x] depends on: #35455 - [x] depends on: #35590 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) WIP t-ring-theory 392/0 Mathlib.lean,Mathlib/RingTheory/Etale/Basic.lean,Mathlib/RingTheory/Etale/Weakly.lean,Mathlib/RingTheory/RingHom/Flat.lean 4 2 ['github-actions', 'mathlib-dependent-issues'] nobody
2-54688
2 days ago
26-28785
26 days ago
0-1
1 second
35745 khwilson
author:khwilson
 feat(Mathlib/Analysis/Asymptotics/Defs): congr lemmas for IsBigO* This PR primarily provides two calculational lemmas that are commonly used in bounding functions. First, it provides `IsBigO*.sum_congr`. This theorem allows the user to bound each term of a (finite) sum individually. This is different than `IsBigO.sum` which requires all terms to be bound by the _same_ function. Second, it provides `IsBigO*.sum_congr'`. This theorem allows the user to bound the terms of a sum individually _when the length of the sum changes with respect to the running variable_. This is a common setup with certain techniques such as the method of the hyperbola. Note: This makes the overall length of this file go above 1500 lines. I'm happy to break it up at the request of reviewers, but that's a bigger change to the API. AI Usage: Looking up various lemma names in Google Gemini. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-analysis new-contributor 91/1 Mathlib/Analysis/Asymptotics/Defs.lean 1 17 ['github-actions', 'j-loreaux', 'khwilson'] j-loreaux
assignee:j-loreaux
2-53621
2 days ago
2-53672
2 days ago
18-33718
18 days
35830 AntoineChambert-Loir
author:AntoineChambert-Loir
 feat(Data/Nat/Choose/Multinomial): multinomial coefficients Define the multinomial coefficients, a variant of `Nat.multinomial`. - redefine `Multiset.multinomial`. Given a multiset `m` of natural numbers, `m.multinomial` is the multinomial coefficient defined by (m.sum) ! / ∏ i ∈ m, m i !. As an example, `Multiset.multinomial {1, 2, 2} = 30`. This is the exponent of $x y^2 z^2$ in $(x+y+z)^5$. This should not be confused with the existing `Multiset.multinomial` which gives a different answer, for example, `Multiset.multinomial {1, 2, 2} = 3`. This function is renamed as `Multiset.countPerms`. - `Multiset.multinomial_cons` proves that `(x ::ₘ m).multinomial = Nat.choose (x + m.sum) x * m.multinomial` - `Multiset.multinomial_add` proves that `(m + m').multinomial = Nat.choose (m + m').sum m.sum * m.multinomial * m'.multinomial` co-authored with @mariainesdff --- - [ ] depends on: #36611 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-data blocked-by-other-PR 147/20 Mathlib/Analysis/Calculus/ContDiff/Bounds.lean,Mathlib/Data/List/ToFinsupp.lean,Mathlib/Data/Nat/Choose/Multinomial.lean 3 14 ['AntoineChambert-Loir', 'github-actions', 'joneugster', 'mathlib-dependent-issues', 'vihdzp'] joneugster
assignee:joneugster
2-52381
2 days ago
3-67166
3 days ago
13-85225
13 days
34727 ocfnash
author:ocfnash
 feat: the Geck construction yields a Lie algebra with the expected Cartan matrix --- Closes https://github.com/leanprover-community/mathlib4/issues/28714 - [ ] depends on: #36297 - [ ] depends on: #36298 [![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$
 831/0 Mathlib.lean,Mathlib/Algebra/Algebra/Pi.lean,Mathlib/Algebra/Lie/Basis.lean,Mathlib/Algebra/Lie/Subalgebra.lean,Mathlib/Algebra/Module/LinearMap/Basic.lean,Mathlib/Data/Sum/Basic.lean,Mathlib/LinearAlgebra/Basis/Basic.lean,Mathlib/LinearAlgebra/LinearIndependent/BaseChange.lean,Mathlib/LinearAlgebra/LinearIndependent/Defs.lean,Mathlib/LinearAlgebra/RootSystem/CartanMatrix.lean,Mathlib/LinearAlgebra/RootSystem/GeckConstruction/Basic.lean,Mathlib/LinearAlgebra/RootSystem/GeckConstruction/Basis.lean 12 3 ['github-actions', 'mathlib-dependent-issues', 'mathlib-merge-conflicts'] nobody
2-49421
2 days ago
42-54640
42 days ago
0-1
1 second
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
2-49301
2 days ago
581-78675
581 days ago
0-1791
29 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
2-49289
2 days ago
500-69920
500 days ago
29-26213
29 days
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
2-49277
2 days ago
330-80671
330 days ago
56-56728
56 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
2-49265
2 days ago
311-72561
311 days ago
72-3718
72 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
2-49251
2 days ago
293-11954
293 days ago
19-33859
19 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
2-49236
2 days ago
227-86370
227 days ago
36-67657
36 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
2-49222
2 days ago
223-48752
223 days ago
12-24721
12 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
2-49210
2 days ago
117-80285
117 days ago
114-38193
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
2-49198
2 days ago
209-71222
209 days ago
8-1216
8 days
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
2-49187
2 days ago
153-75393
153 days ago
12-3204
12 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
2-49164
2 days ago
61-41546
61 days ago
43-77956
43 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
2-49144
2 days ago
46-37385
46 days ago
59-63981
59 days
36324 psinary-sketch
author:psinary-sketch
 feat(NumberTheory/LSeries): Schwarz reflection for completedRiemannZeta₀ --- Three new theorems about `completedRiemannZeta₀`: - `completedRiemannZeta₀_conj`: Schwarz reflection `Λ₀(conj s) = conj(Λ₀(s))` - `completedRiemannZeta₀_im_eq_zero_on_half`: the completed zeta function is real-valued on the critical line - `completedRiemannZeta₀_conj_eq_self_on_half`: equivalent fixed-point formulation The Schwarz reflection follows from the Mellin representation: the kernel is real-valued, so the integral commutes with conjugation via `integral_conj`. The critical-line results compose this with the functional equation. t-number-theory new-contributor 147/0 Mathlib.lean,Mathlib/NumberTheory/LSeries/SchwarzReflection.lean 2 13 ['SnirBroshi', 'github-actions', 'psinary-sketch'] alexjbest
assignee:alexjbest
2-40011
2 days ago
2-40069
2 days ago
5-58537
5 days
36625 psinary-sketch
author:psinary-sketch
 feat(Analysis/Complex): analytic order characterization of simple zeros --- This PR adds `analyticOrderAt_eq_one_iff_deriv_ne_zero`: for an analytic function `f` at `z₀`, analyticOrderAt (f · - f z₀) z₀ = 1 ↔ deriv f z₀ ≠ 0 This connects the abstract `analyticOrderAt` API (from `Mathlib.Analysis.Analytic.Order`) to concrete derivative information, bridging the gap between vanishing order theory and pointwise derivative computations. The proof combines `analyticOrderAt_deriv_add_one` with `analyticOrderAt_sub_eq_one_of_deriv_ne_zero`. Depends on: `Mathlib.Analysis.Analytic.Order`, `Mathlib.Analysis.Complex.CauchyIntegral` t-analysis new-contributor 71/0 Mathlib.lean,Mathlib/Analysis/Complex/MeromorphicLogDeriv.lean 2 2 ['github-actions'] nobody
2-39164
2 days ago
2-39126
2 days ago
0-1471
24 minutes
36646 NoahW314
author:NoahW314
 doc(Topology/Homotopy): fix ContinuousMap.Homotopy docstrings Some of the docstrings referenced Homotopy (from Algebra/Homology) instead of ContinuousMap.Homotopy. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-topology new-contributor 15/11 Mathlib/Topology/Homotopy/Basic.lean 1 2 ['erdOne', 'github-actions'] nobody
2-36984
2 days ago
2-39718
2 days ago
2-39673
2 days
36379 JadAbouHawili
author:JadAbouHawili
 doc: module docs for Finset Lattice and Defs --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-data new-contributor 6/7 Mathlib/Data/Finset/Defs.lean,Mathlib/Data/Finset/Lattice/Basic.lean 2 4 ['JadAbouHawili', 'github-actions'] joneugster
assignee:joneugster
2-36541
2 days ago
8-30906
8 days ago
8-32512
8 days
36607 harahu
author:harahu
 chore(AlgebraicTopology): normalize continuation line indentation We standardize indentation such that continuation lines now line up with the first line of the item they're continuing. This is enforced by markdown formatters such as `mdformat`. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebraic-topology 4/4 Mathlib/AlgebraicTopology/CechNerve.lean,Mathlib/AlgebraicTopology/SimplexCategory/Defs.lean 2 2 ['github-actions', 'mathlib-bors'] nobody
2-34345
2 days ago
3-46945
3 days ago
3-46900
3 days
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 --- - [ ] depends on: #35141 - [ ] depends on: #35175 - [ ] depends on: #35240 - [ ] depends on: #34976 - [ ] depends on: #33958 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) WIP t-algebraic-geometry blocked-by-other-PR large-import merge-conflict 1632/73 Mathlib.lean,Mathlib/Algebra/Ring/Subring/Basic.lean,Mathlib/AlgebraicGeometry/Fiber.lean,Mathlib/AlgebraicGeometry/Morphisms/Etale.lean,Mathlib/AlgebraicGeometry/Sites/AffineEtale.lean,Mathlib/AlgebraicGeometry/Sites/Etale.lean,Mathlib/AlgebraicGeometry/Sites/EtalePoint.lean,Mathlib/CategoryTheory/Abelian/GrothendieckAxioms/Sheaf.lean,Mathlib/CategoryTheory/Elements.lean,Mathlib/CategoryTheory/EssentialImage.lean,Mathlib/CategoryTheory/Functor/ReflectsIso/Jointly.lean,Mathlib/CategoryTheory/Limits/Constructions/Over/Connected.lean,Mathlib/CategoryTheory/Limits/FinallySmall.lean,Mathlib/CategoryTheory/Limits/MorphismProperty.lean,Mathlib/CategoryTheory/MorphismProperty/Comma.lean,Mathlib/CategoryTheory/ObjectProperty/Small.lean,Mathlib/CategoryTheory/ShrinkYoneda.lean,Mathlib/CategoryTheory/Sites/DenseSubsite/OneHypercoverDense.lean,Mathlib/CategoryTheory/Sites/Descent/DescentData.lean,Mathlib/CategoryTheory/Sites/Descent/Precoverage.lean,Mathlib/CategoryTheory/Sites/LocallySurjective.lean,Mathlib/CategoryTheory/Sites/Point/Basic.lean,Mathlib/CategoryTheory/Sites/Point/Conservative.lean,Mathlib/CategoryTheory/Sites/PrecoverageToGrothendieck.lean,Mathlib/CategoryTheory/Sites/SheafOfTypes.lean,Mathlib/CategoryTheory/Sites/Types.lean,Mathlib/CategoryTheory/Types/Epimorphisms.lean,Mathlib/Topology/Sheaves/Points.lean,Mathlib/Topology/Sheaves/Sheaf.lean 29 3 ['github-actions', 'mathlib-dependent-issues', 'mathlib-merge-conflicts'] nobody
2-34205
2 days ago
33-52169
33 days ago
0-1
1 second
34622 vihdzp
author:vihdzp
 feat: Nat/Int casts on char two rings --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra maintainer-merge
label:t-algebra$
 50/8 Mathlib/Algebra/CharP/Two.lean,Mathlib/Data/Set/Insert.lean 2 11 ['erdOne', 'eric-wieser', 'github-actions', 'vihdzp'] erdOne
assignee:erdOne
2-32319
2 days ago
13-72656
13 days ago
45-8549
45 days
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
2-31940
2 days ago
11-55281
11 days ago
11-58512
11 days
36650 Ljon4ik4
author:Ljon4ik4
 feat: added simp lemmas to LieRinehartAlgebra This pull request adds simp lemmas for the defining properties of Lie-Rinehart-Algebras. Additionally the definition of anchor is moved out of the Hom namespace. (Even though the anchor itself is a Hom, it is an object associated to an LR-algebra, not a Hom of algebras). --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra new-contributor
label:t-algebra$
 25/13 Mathlib/Algebra/LieRinehartAlgebra/Defs.lean 1 2 ['github-actions'] nobody
2-30547
2 days ago
2-30626
2 days ago
2-30581
2 days
34966 Deep0Thinking
author:Deep0Thinking
 feat(MeasureTheory): add `continuousWithinAt_Ici/Iic_primitive_Ioi/Iio` and `continuousOn_Ici/Iic_primitive_Ioi/Iio/Ici/Iic` This PR proves: - `continuousWithinAt_Ici/Iic_primitive_Ioi/Iio` - `continuousOn_Ici/Iic_primitive_Ioi/Iio/Ici/Iic` - `integral_Ioi_sub_Ioi`, `integral_Ioi_sub_Ioi'`, `integral_Iio_sub_Iio`, `integral_Iio_sub_Iio'` - `Ioi_diff_Ioc` --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor t-measure-probability 128/1 Mathlib/MeasureTheory/Integral/Bochner/Set.lean,Mathlib/MeasureTheory/Integral/DominatedConvergence.lean,Mathlib/MeasureTheory/Integral/IntervalIntegral/Basic.lean,Mathlib/Order/Interval/Set/LinearOrder.lean 4 19 ['CoolRmal', 'Deep0Thinking', 'EtienneC30', 'github-actions'] RemyDegenne
assignee:RemyDegenne
2-30108
2 days ago
5-36677
5 days ago
30-41067
30 days
36649 JovanGerb
author:JovanGerb
 chore(CategoryTheory/Adjunction/Basic): use `dsimp%` in definition The theorems `left_triangle_components` and `right_triangle_components` are only well typed up to unfolding the `Functor.id` and `Functor.comp` in `unit` and `counit`. This PR uses `dsimp%` to make sure the implicit arguments have `Functor.id` and `Functor.comp` unfolded where possible. This came up because `to_dual` complained that `left_triangle_components` and `right_triangle_components` aren't actually dual in `reducible` transparency. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) 18/14 Mathlib/Algebra/Category/ModuleCat/Sheaf/PushforwardContinuous.lean,Mathlib/AlgebraicTopology/ModelCategory/BifibrantObjectHomotopy.lean,Mathlib/CategoryTheory/Adjunction/Basic.lean,Mathlib/CategoryTheory/Adjunction/Triple.lean,Mathlib/CategoryTheory/Limits/Preserves/Shapes/Zero.lean,Mathlib/CategoryTheory/Monad/Monadicity.lean,Mathlib/CategoryTheory/Shift/Adjunction.lean,Mathlib/Topology/Sheaves/Skyscraper.lean 8 2 ['JovanGerb', 'github-actions'] nobody
2-23499
2 days ago
2-28713
2 days ago
2-29457
2 days
36651 Ljon4ik4
author:Ljon4ik4
 feat: compatible (pairs of) derivations form a Lie algebra Given a map of $R$-algebras $\sigma: A\to A'$, a derivation $X$ of $A$ is called compatible with a Derivation $X'$ of $A'$, if $\sigma\circ X =X'\circ \sigma$. Given two such pairs $(X,X')$ and $(Y,Y')$, their Lie brackets $([X,Y], [X',Y'])$ again form such a pair. This concept is relevant in differential geometry, where $A$, $A'$ are the algebras of smooth functions on manifolds and $\sigma$ comes from a smooth map between manifolds. (In this case one calls the vector fields (= Derivations) 'related'). This concept can be encoded by the fact that the compatible Derivations form a Lie subalgebra of the direct sum of the derivations of $A$ with the derivations of $A'$. In this PR we add this fact, along with a convenient way to express the direct sum of two Lie algebras, as a special case of their semidirect sum. (There already is a direct sum construction for aribtrary families of Lie algebras in `Mathlib.Algebra.Lie.DirectSum`), but I don't know if there is a very convenient way to use it in the binary case. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-ring-theory new-contributor 39/0 Mathlib/Algebra/Lie/SemiDirect.lean,Mathlib/RingTheory/Derivation/Lie.lean 2 3 ['github-actions'] nobody
2-23296
2 days ago
2-23361
2 days ago
2-23825
2 days
36654 JovanGerb
author:JovanGerb
 chore(Translate): address outdated comment This PR addresses an outdated comment I wrote in `checkExistingType`. It was written when `==` was used for the comparison. But since we now use reducible `isDefEq`, the precise universe instantiation doesn't matter. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-meta 2/6 Mathlib/Tactic/Translate/Core.lean 1 1 ['github-actions'] nobody
2-22330
2 days ago
2-22419
2 days ago
2-22374
2 days
35451 samueloettl
author:samueloettl
 feat(MeasureTheory.Function): compMeasurePreserving_iterate --- These are useful for dynamics/ergodic theory. Possibly some of these could be simp lemmas but I'm not confident enough to say that they are so I didn't mark them as such. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor t-measure-probability 113/2 Mathlib/MeasureTheory/Function/AEEqFun.lean,Mathlib/MeasureTheory/Function/LpSpace/Basic.lean,Mathlib/MeasureTheory/Measure/QuasiMeasurePreserving.lean,Mathlib/Order/Filter/Basic.lean 4 33 ['ADedecker', 'EtienneC30', 'github-actions', 'samueloettl'] ADedecker
assignee:ADedecker
2-21752
2 days ago
2-72501
2 days ago
22-45642
22 days
36604 JovanGerb
author:JovanGerb
 feat(Translate): reorder universes This PR improves the heuristic for reordering of universes in `to_dual`/`to_additive`. The previous heuristic worked well when the first two universes had to be swapped. For example for translating `a ^ n` to `n • a`, and for dualizing `GaloisConnection`. However, in Category theory we sometimes need to swap more universes because a category instance comes with 2 universes which both need to be swapped. In particular, the comma category, and adjunctions both need this feature. This PR doesn't add any syntax for specifying the reordering of universes. It is assumed that the universe reordering can always be inferred from the normal reordering and from the type. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-meta 173/91 Mathlib/CategoryTheory/Comma/Basic.lean,Mathlib/Tactic/Translate/Core.lean,Mathlib/Tactic/Translate/Reorder.lean 3 2 ['github-actions', 'mathlib-bors'] nobody
2-21062
2 days ago
3-48823
3 days ago
0-7
7 seconds
36535 JovanGerb
author:JovanGerb
 perf(Rintheory/Ideal/Quotient/HasFiniteQuotients): remove unused instance This PR helps to fix the timeouts in #36395. The removed instance is a special case of `of_module_finite` which isn't tagged as an instance. But I don't see a reason why this particular special case should be an instance. It is problematic because it causes type class search to suddenly search for things related to `Int`, making it extra slow. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-ring-theory 0/4 Mathlib/RingTheory/Ideal/Quotient/HasFiniteQuotients.lean 1 3 ['JovanGerb', 'github-actions', 'leanprover-radar'] nobody
2-20895
2 days ago
4-55430
4 days ago
4-55385
4 days
36304 JovanGerb
author:JovanGerb
 feat(Translate): translate binder names starting with `h` This PR expands the binder name translation in `to_dual` and `to_additive`. If the binder name cannot be translated by itself, then try translating without the prefix `h`. This is useful when a hypothesis is called `hmin` or `hmax`. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-meta 22/4 Mathlib/Tactic/Translate/Core.lean,MathlibTest/ToDual.lean 2 5 ['JovanGerb', 'gasparattila', 'github-actions', 'mathlib-merge-conflicts'] dwrensha
assignee:dwrensha
2-20434
2 days ago
2-20457
2 days ago
9-17279
9 days
33662 Pjotr5
author:Pjotr5
 feat(Algebra/Order/BigOperators/Expect): add lemmas and strict variants ### Summary - Combine `le_expect_nonempty_of_subadditive` and `le_expect_of_subadditive` into a single lemma `le_expect_of_subadditive`. The extra assumptions `(hs : s.Nonempty)` and `(h_zero : m 0 = 0)` are unnecessary (since `m 0 = 0` follows from `h_div`). This requires a small downstream update to `Mathlib/Analysis/RCLike/Basic.lean` (`norm_expect_le`). - Add strict-inequality variants: `expect_lt_expect`, `expect_lt`, `lt_expect`. - Add existence lemmas: `exists_le_of_expect_le_expect`, `exists_le_of_le_expect`, `exists_le_of_expect_le`, and `exists_lt_of_expect_lt_expect`. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor t-algebra
label:t-algebra$
 46/16 Mathlib/Algebra/Order/BigOperators/Expect.lean,Mathlib/Analysis/RCLike/Basic.lean 2 1 ['github-actions'] nobody
2-18787
2 days ago
69-75424
69 days ago
69-75379
69 days
30077 agjftucker
author:agjftucker
 feat(Analysis/Calculus/ImplicitFunction): define implicitFunctionOfBivariate Two specializations of the implicit function theorem, one applying to an uncurried bivariate function and one applying to a curried bivariate function. --- This PR is a synthesis of material from others which failed to make progress. But there seems always to have been a different reason for it, so I'm afraid I keep trying where maybe I shouldn't. #26985 reviewed by j-loreaux and later on by winstonyin. #16743 and #26300 reviewed by sgouezel. [Zulip chat](https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/Inverse.20function.20theorem.20and.20ContinuousLinearEquiv/with/567586606) with Yury Kudryashov. There are certain changes agreed upon in those PRs, e.g. to existing names, that are doubtless good but that I have excised from this PR to avoid distraction. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-analysis 306/0 Mathlib.lean,Mathlib/Analysis/Calculus/FDeriv/Partial.lean,Mathlib/Analysis/Calculus/Implicit.lean,Mathlib/Analysis/Calculus/ImplicitFunction/Bivariate.lean,Mathlib/Analysis/Calculus/ImplicitFunction/ProdDomain.lean 5 2 ['github-actions', 'mathlib4-merge-conflict-bot'] j-loreaux
assignee:j-loreaux
2-18607
2 days ago
27-32305
27 days ago
42-6875
42 days
33736 fbarroero
author:fbarroero
 feat(RingTheory/Polynomial/GaussNorm): The `gaussNorm` is an absolute value if `v` is a nonarchimedean absolute value We prove ``` Polynomial.gaussNorm_isAbsoluteValue {c : ℝ} {R : Type*} [Ring R] {v : AbsoluteValue R ℝ} (hna : IsNonarchimedean v) (hc : 0 < c) : IsAbsoluteValue (gaussNorm v c) ``` --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-ring-theory 189/7 Mathlib/Algebra/Order/AbsoluteValue/Basic.lean,Mathlib/Algebra/Order/Ring/IsNonarchimedean.lean,Mathlib/RingTheory/Polynomial/GaussNorm.lean 3 11 ['copilot-pull-request-reviewer', 'erdOne', 'fbarroero', 'github-actions'] mattrobball
assignee:mattrobball
2-18604
2 days ago
34-60727
34 days ago
63-42942
63 days
33850 YuvalFilmus
author:YuvalFilmus
 feat(Chebyshev/ChebyshevGauss): Chebyshev–Gauss formula We prove the Chebyshev–Gauss quadrature formula, which reduces an integral with respect to the Chebyshev weight function to a finite sum. --- - [ ] depends on: #33676 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-analysis 167/0 Mathlib.lean,Mathlib/Analysis/SpecialFunctions/Trigonometric/Chebyshev/ChebyshevGauss.lean 2 4 ['github-actions', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] sgouezel
assignee:sgouezel
2-18603
2 days ago
47-79490
47 days ago
47-81033
47 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 87/2 Mathlib/Analysis/Normed/Module/RCLike/Extend.lean,Mathlib/Analysis/Normed/Module/WeakDual.lean 2 8 ['ADedecker', 'github-actions', 'j-loreaux', 'mathlib-dependent-issues', 'mathlib-merge-conflicts'] urkud
assignee:urkud
2-18602
2 days ago
7-42555
7 days ago
7-44926
7 days
35285 SnirBroshi
author:SnirBroshi
 feat(Algebra/LinearRecurrence): define a standard basis for the solution space of a linear recurrence Also `mkSol` is injective. --- The hard work was already done by the existing equivalence `toInit`; this defines the basis that the equivalence provides and uses it to simplify a couple of proofs. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra
label:t-algebra$
 24/12 Mathlib/Algebra/LinearRecurrence.lean 1 1 ['github-actions'] kim-em
assignee:kim-em
2-18599
2 days ago
31-7126
31 days ago
31-7081
31 days
35798 xroblot
author:xroblot
 feat(RamificationInertia): compute the degrees of the decomposition field and inertia field Prove the degree formulas for the decomposition and inertia fields. --- - [x] depends on: #35530 - [x] depends on: #35303 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) large-import t-number-theory 92/5 Mathlib/NumberTheory/RamificationInertia/HilbertTheory.lean 1 9 ['github-actions', 'joneugster', 'mathlib-dependent-issues', 'mathlib-merge-conflicts', 'tb65536', 'xroblot'] tb65536
assignee:tb65536
2-18594
2 days ago
6-65940
6 days ago
6-71224
6 days
36018 wwylele
author:wwylele
 feat(LinearAlgebra/AffineSpace): shifting a subspace towards a point This is preparing to calculate the volume of a simplex by integrating the cross-section created by shifting the base plane. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra
label:t-algebra$
 254/0 Mathlib.lean,Mathlib/LinearAlgebra/AffineSpace/AffineSubspace/Shift.lean,Mathlib/LinearAlgebra/AffineSpace/Simplex/Basic.lean 3 7 ['copilot-pull-request-reviewer', 'github-actions', 'mathlib-bors'] kim-em
assignee:kim-em
2-18592
2 days ago
5-23180
5 days ago
5-23151
5 days
36242 joneugster
author:joneugster
 feat(scripts/autolabel): collect label dependencies transitively Collect label dependencies transitively. if `t-algebraic-geometry -> t-ring-theory` and `t-ring-theory -> t-algebra` are two dependencies where the latter label is dropped from the list of applicable labels, then `t-algebraic-geometry -> t-algebra` is also dropped. --- I forgot if this was an oversight in #34066 or if we split this out to facilitate discussion should this not be desired behaviour. - [x] depends on: #34066 - part of: #34079 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) CI 2/3 scripts/autolabel.lean 1 2 ['github-actions', 'mathlib-dependent-issues'] bryangingechen
assignee:bryangingechen
2-18591
2 days ago
11-7302
11 days ago
11-7714
11 days
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 41/0 Mathlib/AlgebraicGeometry/EllipticCurve/Affine/Point.lean,Mathlib/AlgebraicGeometry/EllipticCurve/Jacobian/Point.lean,Mathlib/AlgebraicGeometry/EllipticCurve/Projective/Point.lean 3 11 ['CBirkbeck', 'Multramate', 'erdOne', 'github-actions', 'riccardobrasca'] dagurtomas
assignee:dagurtomas
2-18590
2 days ago
9-35338
9 days ago
9-35293
9 days
36357 yuanyi-350
author:yuanyi-350
 feat(Analysis/Deriv): add some lemmas for `iteratedDeriv` --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-analysis 84/8 Mathlib/Analysis/Calculus/ContDiff/FTaylorSeries.lean,Mathlib/Analysis/Calculus/Deriv/Basic.lean,Mathlib/Analysis/Calculus/FDeriv/Add.lean,Mathlib/Analysis/Calculus/FDeriv/Equiv.lean,Mathlib/Analysis/Calculus/IteratedDeriv/Lemmas.lean 5 7 ['github-actions', 'j-loreaux', 'urkud', 'yuanyi-350'] sgouezel
assignee:sgouezel
2-18589
2 days ago
5-86167
5 days ago
7-58395
7 days
36399 chrisflav
author:chrisflav
 feat(RingTheory/Flat): finite flat algebra is trivial if rank is equal to `1` --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-ring-theory 177/3 Mathlib.lean,Mathlib/LinearAlgebra/TensorProduct/Associator.lean,Mathlib/RingTheory/Flat/Rank.lean,Mathlib/RingTheory/Localization/BaseChange.lean,Mathlib/RingTheory/Spectrum/Prime/Topology.lean,Mathlib/RingTheory/TensorProduct/Maps.lean 6 1 ['github-actions'] alreadydone
assignee:alreadydone
2-18588
2 days ago
7-51974
7 days ago
7-51929
7 days
36433 tb65536
author:tb65536
 feat(RingTheory/Ideal/Quotient/HasFiniteQuotients): a ring with finite quotients has finitely many ideals of bounded norm This PR proves that a ring with finite quotients has only finitely many ideals of bounded norm. This is needed for the construction of L-functions over number fields. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-ring-theory large-import 69/5 Mathlib/RingTheory/Ideal/Quotient/HasFiniteQuotients.lean 1 1 ['github-actions'] chrisflav
assignee:chrisflav
2-18586
2 days ago
6-68566
6 days ago
0-1
1 second
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 95/0 Mathlib.lean,Mathlib/Data/Sym/Sym2/Card.lean 2 1 ['github-actions'] joneugster
assignee:joneugster
2-18585
2 days ago
6-54394
6 days ago
6-54349
6 days
36458 MichaelStollBayreuth
author:MichaelStollBayreuth
 feat(Algebra/Group): some API lemmas for powMonoidHom This adds a few lemmas about `powMonoidHom`/`nsmulAddMonoidHom` and one convenience lemma that says that the range (as a `MonoidHom`/`AddMonoidHom`) of a `MulEquiv`/`AddEquiv` is the top subobject. It also defines the isomorphism `((i : ι) → A i) ⧸ (powMonoidHom n).range ≃* ((i : ι) → A i ⧸ (powMonoidHom n).range)` and its additive version. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra
label:t-algebra$
 67/2 Mathlib/Algebra/Group/Subgroup/Ker.lean,Mathlib/Algebra/Group/Subgroup/ZPowers/Lemmas.lean,Mathlib/GroupTheory/QuotientGroup/Basic.lean 3 14 ['MichaelStollBayreuth', 'Vierkantor', 'github-actions'] dagurtomas
assignee:dagurtomas
2-18585
2 days ago
5-38169
5 days ago
6-32475
6 days
36491 aditya-ramabadran
author:aditya-ramabadran
 feat(Analysis/Distribution): define Dirac delta distribution Defines Dirac delta distribution (classical) Closes #36464 * Note: Used `continuous_eval_const` in defining Delta in Distribution.lean, rather than the way it's done in TemperedDistribution.lean (which could also work) * Also chose to define for $x \in \Omega$ rather than all $x \in E$, can make the other way if that's better? --- **Testing**: ```lean example (x : E) : Continuous fun φ : 𝓓^{n}(Ω, F) => φ x := continuous_eval_const x ``` Lean builds successfully [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-analysis new-contributor 29/0 Mathlib/Analysis/Distribution/ContDiffMapSupportedIn.lean,Mathlib/Analysis/Distribution/Distribution.lean,Mathlib/Analysis/Distribution/TestFunction.lean 3 2 ['github-actions'] j-loreaux
assignee:j-loreaux
2-18583
2 days ago
5-45921
5 days ago
5-45876
5 days
36657 BryceT233
author:BryceT233
 feat(RingTheory): adds two lemmas on `Module.length` This PR adds two lemmas regarding the length of modules: * `Submodule.length_le_restrictScalar` shows that the length of an $R$-submodule is less than or equal to its length as an $A$-submodule under scalar restriction. * `Submodule.length_quotient_lt` shows that for a module of finite length, the length of a quotient module $M \big/ p$ is strictly less than the length of $M$ when the submodule $p$ is non-trivial. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-ring-theory 23/0 Mathlib/RingTheory/Length.lean 1 1 ['github-actions'] nobody
2-16749
2 days ago
2-16814
2 days ago
2-19619
2 days
35670 BryceT233
author:BryceT233
 feat(RingTheory/AdicCompletion): completeness of `AdicCompletion` This is the last PR split from #34936, which follows [[Stacks 05GG](https://stacks.math.columbia.edu/tag/05GG)] and formalizes the result that `AdicCompletion I M` is `I`-adically complete when the ideal `I` is finitely generated. --- - [x] depends on: #35595 - [x] depends on: #35646 - [ ] depends on: #35647 - [x] depends on: #35660 - [ ] depends on: #35665 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) blocked-by-other-PR new-contributor t-ring-theory 213/7 Mathlib.lean,Mathlib/LinearAlgebra/SModEq/Basic.lean,Mathlib/RingTheory/AdicCompletion/Basic.lean,Mathlib/RingTheory/AdicCompletion/Completeness.lean 4 5 ['github-actions', 'joneugster', 'mathlib-dependent-issues', 'mathlib-merge-conflicts'] nobody
2-13150
2 days ago
22-10278
22 days ago
0-824
13 minutes
36658 JovanGerb
author:JovanGerb
 chore(Topology/Order/Hom/Esakia): replace `RelHomClass` with `OrderHomClass` Let's use the `abbrev` if we already have it. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-topology 1/1 Mathlib/Topology/Order/Hom/Esakia.lean 1 1 ['github-actions'] nobody
2-12346
2 days ago
2-15883
2 days ago
2-15838
2 days
36661 wwylele
author:wwylele
 feat(Analysis/Lp): simp lemma for LinearMap.det and toLpLin Analog to [LinearMap.det_toLin'](https://leanprover-community.github.io/mathlib4_docs/Mathlib/LinearAlgebra/Determinant.html#LinearMap.det_toLin') --- Seems trivial given the proof is only one line, but this took me quite some time to find when the obvious simplification didn't happen. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) easy t-analysis large-import 6/0 Mathlib/Analysis/Normed/Lp/Matrix.lean 1 1 ['github-actions'] nobody
2-11873
2 days ago
2-12383
2 days ago
2-12338
2 days
36663 plp127
author:plp127
 fix(Computability/Halting): remove `set_option linter.flexible false` Also unsqueeze some terminal `simp`s. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) tech debt t-computability 12/17 Mathlib/Computability/Halting.lean 1 1 ['github-actions'] nobody
2-9125
2 days ago
2-9203
2 days ago
2-9158
2 days
36656 JovanGerb
author:JovanGerb
 fix(Simps): don't reduce the type of the equality This PR fixes a small problem with `simps`, that the type in the generated equality lemmas is unnecessarily reduced. This can result in raw projections, which we typically don't want in our lemmas. This doesn't affect how these lemmas behave in `simp`. This problem confused `to_dual` a bit in `CategoryTheory.Iso`. This PR lets us remove the `respectTansparency` option there. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) 20/6 Mathlib/CategoryTheory/Iso.lean,Mathlib/Tactic/Simps/Basic.lean,MathlibTest/Simps.lean 3 1 ['github-actions'] nobody
2-8531
2 days ago
2-19936
2 days ago
2-20393
2 days
36655 plp127
author:plp127
 chore(IsFractionRing): make argument explicit Makes the base ring an explicit argument in `IsFractionRing.div_surjective`. This argument cannot be inferred by typeclass inference, because the base ring is not an `outParam` or `semiOutParam` in the type of `IsFractionRing`. It is also rarely determined by the expected type, since this is typically used as the discriminant for an `obtain` or `rcases`. Also update every usage of `IsFractionRing.div_surjective` to take advantage of this explicit argument. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-ring-theory 25/24 Mathlib/Algebra/Algebra/Epi.lean,Mathlib/FieldTheory/Galois/IsGaloisGroup.lean,Mathlib/NumberTheory/NumberField/Completion/FinitePlace.lean,Mathlib/NumberTheory/NumberField/ProductFormula.lean,Mathlib/NumberTheory/RamificationInertia/HilbertTheory.lean,Mathlib/RingTheory/Invariant/Basic.lean,Mathlib/RingTheory/Localization/AsSubring.lean,Mathlib/RingTheory/Localization/FractionRing.lean,Mathlib/RingTheory/Localization/Integral.lean,Mathlib/RingTheory/Valuation/Discrete/Basic.lean,Mathlib/RingTheory/Valuation/ValuationRing.lean 11 1 ['github-actions', 'vihdzp'] nobody
2-6933
2 days ago
2-21072
2 days ago
2-21264
2 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/) - [ ] depends on: #36386 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,Mathlib/Algebra/MvPolynomial/Degrees.lean,Mathlib/Algebra/MvPolynomial/Variables.lean,docs/references.bib 14 12 ['Hagb', 'github-actions', 'mathlib-dependent-issues'] nobody
2-6493
2 days ago
8-9381
8 days ago
3-55474
3 days
35912 WenrongZou
author:WenrongZou
 feat(RingTheory/FormalGroup): definition and examples of formal group --- Definition of one dimensional formal group law over commutative ring and some examples of formal group law. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-ring-theory awaiting-author 204/0 Mathlib.lean,Mathlib/RingTheory/FormalGroup/Basic.lean,docs/references.bib 3 15 ['WenrongZou', 'erdOne', 'github-actions', 'wwylele'] erdOne
assignee:erdOne
2-6423
2 days ago
12-3303
12 days ago
15-71428
15 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 47/0 Mathlib/ModelTheory/Semantics.lean,Mathlib/ModelTheory/Syntax.lean 2 2 ['github-actions'] nobody
2-2905
2 days ago
2-3003
2 days ago
2-2958
2 days
36585 vihdzp
author:vihdzp
 feat: order type of `Iio o` is `lift o` Downstreamed from the CGT repo. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-set-theory 18/16 Mathlib/SetTheory/Ordinal/Arithmetic.lean,Mathlib/SetTheory/Ordinal/Basic.lean,Mathlib/SetTheory/Ordinal/Family.lean,Mathlib/SetTheory/ZFC/Ordinal.lean,Mathlib/SetTheory/ZFC/VonNeumann.lean 5 4 ['SnirBroshi', 'github-actions', 'vihdzp'] nobody
2-2341
2 days ago
2-2407
2 days ago
2-62447
2 days
36117 vihdzp
author:vihdzp
 chore(RingTheory/IntegralDomain): review file This PR does the following: - rename two theorems to better match Mathlib standards - golf a proof --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-ring-theory 27/34 Mathlib/NumberTheory/NumberField/Units/Basic.lean,Mathlib/RingTheory/IntegralDomain.lean,Mathlib/RingTheory/RootsOfUnity/Basic.lean 3 1 ['github-actions'] nobody
2-1362
2 days ago
2-1424
2 days ago
2-4857
2 days
36510 Parcly-Taxel
author:Parcly-Taxel
 chore: delete >6 month old deprecated modules * Every `deprecated_module` up to and including `2025-09-12`. * `Mathlib.Deprecated.Estimator` and `Mathlib.Deprecated.MLList.BestFirst` from #29549. * `Mathlib.Data.Nat.PartENat` from #29231. * `Mathlib.Deprecated.RingHom` from #33429 – at the time it was removed (see https://github.com/leanprover-community/mathlib4/blob/561ba4ae9408025b2d4c9403116b575b7d2a0205/Mathlib/Deprecated/RingHom.lean) there were only two declarations inside and they both had `@[deprecated (since := "2025-06-09")]`, so there was effectively a `deprecated_module (since := "2025-06-09")` on top. file-removed tech debt 0/1606 Mathlib.lean,Mathlib/Analysis/NormedSpace/BallAction.lean,Mathlib/Analysis/NormedSpace/DualNumber.lean,Mathlib/Analysis/NormedSpace/FunctionSeries.lean,Mathlib/Analysis/NormedSpace/HomeomorphBall.lean,Mathlib/Analysis/NormedSpace/IndicatorFunction.lean,Mathlib/Analysis/NormedSpace/Int.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/Pointwise.lean,Mathlib/Analysis/NormedSpace/RCLike.lean,Mathlib/Analysis/NormedSpace/Real.lean,Mathlib/Analysis/NormedSpace/SphereNormEquiv.lean,Mathlib/Data/Nat/PartENat.lean,Mathlib/Deprecated/Estimator.lean,Mathlib/Deprecated/MLList/BestFirst.lean,Mathlib/Deprecated/Order.lean,Mathlib/Deprecated/RingHom.lean,Mathlib/RingTheory/Valuation/IntegrallyClosed.lean,Mathlib/Topology/Algebra/Module/StrongDual.lean,MathlibTest/search/BestFirst.lean 27 1 ['github-actions'] nobody
2-1153
2 days ago
5-16064
5 days ago
5-16019
5 days
31879 Thmoas-Guan
author:Thmoas-Guan
 feat(Algebra/Homology): Projective dimension in linear equiv In this PR, we proved that projective dimension is stable under (semi-) linear equiv of general universe. --- - [ ] depends on: #32316 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra awaiting-author
label:t-algebra$
 123/0 Mathlib.lean,Mathlib/Algebra/Category/ModuleCat/ProjectiveDimension.lean 2 10 ['Thmoas-Guan', 'dagurtomas', 'github-actions', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] dagurtomas
assignee:dagurtomas
2-1012
2 days ago
46-27559
46 days ago
7-79259
7 days
35707 BryceT233
author:BryceT233
 feat(RingTheory/MvPowerSeries): introduce `truncTotal` This PR introduces the total degree truncation of multivariate formal power series when the index is finite, and uses it to establish the algebraic equivalence between `MvPowerSeries` and the adic completion of `MvPolynomial` with respect to the ideal spanned by all variables `idealOfVars`. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor t-ring-theory 213/2 Mathlib.lean,Mathlib/Data/Finsupp/Weight.lean,Mathlib/RingTheory/MvPowerSeries/Equiv.lean,Mathlib/RingTheory/MvPowerSeries/Trunc.lean 4 7 ['BryceT233', 'github-actions', 'joneugster', 'mathlib-bors', 'wwylele'] erdOne
assignee:erdOne
1-85258
1 day ago
12-12565
12 days ago
20-81811
20 days
35329 BryceT233
author:BryceT233
 feat(Data/Finsupp): add computational lemmas for cons and single This PR introduces `cons_eq_single_zero_iff` and `cons_eq_single_succ_iff`, which are helper lemmas designed to facilitate calculations (or simplification) of equalities involving `Finsupp.cons` and `Finsupp.single`. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-data new-contributor 25/0 Mathlib/Data/Finsupp/Fin.lean 1 2 ['github-actions'] TwoFX
assignee:TwoFX
1-84548
1 day ago
14-25307
14 days ago
29-80930
29 days
35597 BryceT233
author:BryceT233
 feat(AdicTopology): add lemmas about adic topology This PR adds APIs to transport topological and uniform properties of adic topologies across ring equivalences, By upgrading an ideal-preserving ring equivalence to a `UniformEquiv`, we provide natural congruence lemmas for adic completeness, precompleteness, and Hausdorffness, which serve as necessary topological preliminaries for the ongoing formalization of the Cohen Structure Theorem. Co-authored-by: @Thmoas-Guan --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-topology new-contributor 55/2 Mathlib/RingTheory/AdicCompletion/Topology.lean,Mathlib/Topology/Algebra/Nonarchimedean/AdicTopology.lean 2 7 ['erdOne', 'github-actions'] urkud
assignee:urkud
1-84527
1 day ago
21-10135
21 days ago
23-83850
23 days
35665 BryceT233
author:BryceT233
 feat(RingTheory/AdicCompletion): introduce AdicCompletion.finsuppSum This is split from #34936 to make the review process easier. It introduces `AdicCompletion.finsuppSum`, which is a `Finsupp` version of `AdicCompletion.sum`. --- - [x] depends on: #35595 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor t-ring-theory 93/0 Mathlib/LinearAlgebra/Finsupp/LSum.lean,Mathlib/RingTheory/AdicCompletion/Functoriality.lean 2 4 ['github-actions', 'joneugster', 'mathlib-dependent-issues'] riccardobrasca
assignee:riccardobrasca
1-84500
1 day ago
16-145
16 days ago
21-12574
21 days
36245 BryceT233
author:BryceT233
 feat(RingTheory/LocalRing): introduce algebra map version of `ResidueField.map` This PR added `IsLocalHom` instances to `AlgHom` and introduced the algebra map version of `IsLocalRing.ResidueField.map` --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor t-ring-theory 57/0 Mathlib/RingTheory/LocalRing/ResidueField/Basic.lean,Mathlib/RingTheory/LocalRing/RingHom/Basic.lean 2 2 ['github-actions'] mattrobball
assignee:mattrobball
1-84465
1 day ago
11-317
11 days ago
11-369
11 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
1-82382
1 day ago
18-47224
18 days ago
18-47179
18 days
36673 kebekus
author:kebekus
 feat: lemmas on coercions of functions with locally finite support Add lemmas on coercions of functions with locally finite support. Add a lemma allowing to write a function with finite support as a linear combination of singleton indicator functions. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-topology large-import 38/0 Mathlib/Topology/LocallyFinsupp.lean 1 1 ['github-actions'] nobody
1-80520
1 day ago
unknown
0-0
0 seconds
32881 foderm
author:foderm
 feat(AlgebraicTopology/SimplicialObject): define simplicial homotopy This file defines the notion of a combinatorial simplicial homotopy between two morphisms of simplicial objects. A first step towards proving homotopy invariance of simplicial homotopy. See [Zulip](https://leanprover.zulipchat.com/#narrow/channel/335062-homology/topic/Homotopy.20invariance.20of.20singular.20homology/with/562221688). I left in most of my comments to make it easier to understand what indices I used, since I had to shift most of them by 1 to avoid proofs of neq 0 or similar things. I guess they can be removed once we know that the equations are the correct ones. Additionally I added some simp lemmas and an identity, I hope this is more or less how this is usually done. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor t-algebraic-topology awaiting-author 414/0 Mathlib.lean,Mathlib/AlgebraicTopology/SimplicialObject/ChainHomotopy.lean,Mathlib/AlgebraicTopology/SimplicialObject/Homotopy.lean,Mathlib/AlgebraicTopology/SingularHomology/HomotopyInvariance.lean 4 46 ['foderm', 'github-actions', 'joelriou'] nobody
1-76597
1 day ago
92-32546
92 days ago
0-12077
3 hours
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 awaiting-author 29/0 Mathlib/Combinatorics/SimpleGraph/Clique.lean 1 6 ['YaelDillies', 'github-actions'] YaelDillies
assignee:YaelDillies
1-73985
1 day ago
23-20230
23 days ago
23-20185
23 days
36473 AlexeyMilovanov
author:AlexeyMilovanov
 feat(Computability.Primrec.List): add primrec proofs for drop, takeWhile, and dropWhile This PR adds missing proofs that several standard `List` operations are primitive recursive (Primrec), as well as a basic property of `tail` and `drop`. Specifically, it introduces: * `List.tail_iterate`: Applying `tail` to a list `n` times is equivalent to dropping `n` elements. * `Primrec.list_drop`: `List.drop` is primitive recursive. * `Primrec.list_take`: `List.take` is primitive recursive. * `Primrec.list_takeWhile`: `List.takeWhile` is primitive recursive. * `Primrec.list_dropWhile`: `List.dropWhile` is primitive recursive. These are basic computability properties for lists that were currently missing from `Mathlib.Computability.Primrec.List`. All proofs use standard combinators and `of_eq`. t-computability new-contributor maintainer-merge 27/0 Mathlib/Computability/Primrec/List.lean,Mathlib/Data/List/TakeDrop.lean 2 23 ['AlexeyMilovanov', 'Komyyy', 'github-actions'] nobody
1-73890
1 day ago
1-77184
1 day ago
5-10911
5 days
35613 SnirBroshi
author:SnirBroshi
 feat(Combinatorics/SimpleGraph/Clique): use `IsContained` instead of an explicit embedding from top This makes theorems require only a proof that a `Copy` exists rather than provide an explicit `Embedding`. Also tag monotonicity lemmas with `@[gcongr]`. --- This isn't a generalization per-se since one could use choice plus `Copy.topEmbedding` to upgrade the `IsContained` to an embedding, but `IsContained` makes more sense in theorems. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-combinatorics awaiting-author 37/36 Mathlib/Combinatorics/SimpleGraph/Clique.lean,Mathlib/Combinatorics/SimpleGraph/CompleteMultipartite.lean,Mathlib/Combinatorics/SimpleGraph/Extremal/Turan.lean 3 3 ['YaelDillies', 'github-actions'] YaelDillies
assignee:YaelDillies
1-73770
1 day ago
23-22365
23 days ago
23-22620
23 days
36506 BryceT233
author:BryceT233
 feat(Data/Finsupp): adds various computational lemmas for `Finsupp` This PR adds various computational lemmas related to operations of finitely supported functions. Alongside #35329, theses lemmas provide the necessary helpers to construct various equivalences for `MvPowerSeries`. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-data 62/0 Mathlib/Data/Finsupp/Antidiagonal.lean,Mathlib/Data/Finsupp/Basic.lean,Mathlib/Data/Finsupp/Option.lean 3 1 ['github-actions'] nobody
1-71699
1 day ago
1-71658
1 day ago
5-19186
5 days
30505 mariainesdff
author:mariainesdff
 feat(NumberTheory/RatFunc/Ostrowski): prove Ostrowski's theorem for K(X) We prove Ostrowski's theorem for the field of rational functions `K(X)`, where `K` is any field. Co-authored-by: @xgenereux --- - [x] depends on: #30404 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra t-number-theory awaiting-author merge-conflict
label:t-algebra$
 347/18 Mathlib.lean,Mathlib/FieldTheory/RatFunc/AsPolynomial.lean,Mathlib/FieldTheory/RatFunc/Degree.lean,Mathlib/NumberTheory/FunctionField.lean,Mathlib/NumberTheory/RatFunc/Ostrowski.lean 5 68 ['MichaelStollBayreuth', 'alreadydone', 'github-actions', 'mariainesdff', 'mathlib-merge-conflicts', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] MichaelStollBayreuth
assignee:MichaelStollBayreuth
1-69720
1 day ago
7-50633
7 days ago
20-20399
20 days
36621 quantumsnow
author:quantumsnow
 feat: add the category of topological pairs This is needed for the Eilenberg-Steenrod axioms for a homology theory. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-topology new-contributor 167/0 Mathlib/Topology/Category/TopCat/Limits/Basic.lean,Mathlib/Topology/Category/TopPair.lean 2 10 ['chrisflav', 'erdOne', 'github-actions', 'vlad902'] nobody
1-65676
1 day ago
3-28113
3 days ago
0-607
10 minutes
36678 YaelDillies
author:YaelDillies
 refactor(Algebra/MvPolynomial): turn into an `abbrev` There is no semantic difference between `MvPolynomial` and `AddMonoidAlgebra`. A multivariate polynomial *is* an element of some add monoid algebra, while eg an element of an add monoid algebra *can be represented as* a finitely supported function. --- I have no idea why code related to `AlgebraicClosure` suddenly stops working. Help wanted! [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) help-wanted t-ring-theory t-algebra
label:t-algebra$
 77/95 Mathlib/Algebra/MonoidAlgebra/Defs.lean,Mathlib/Algebra/MvPolynomial/Basic.lean,Mathlib/Algebra/MvPolynomial/CommRing.lean,Mathlib/FieldTheory/IsAlgClosed/AlgebraicClosure.lean,Mathlib/FieldTheory/PurelyInseparable/Basic.lean,Mathlib/FieldTheory/PurelyInseparable/Tower.lean,Mathlib/FieldTheory/SeparableDegree.lean,Mathlib/FieldTheory/SeparablyGenerated.lean,Mathlib/LinearAlgebra/Matrix/Adjugate.lean,Mathlib/RingTheory/Extension/Presentation/Core.lean,Mathlib/RingTheory/Finiteness/Descent.lean,Mathlib/RingTheory/MvPolynomial/Ideal.lean,Mathlib/RingTheory/Norm/Transitivity.lean,Mathlib/RingTheory/Trace/Basic.lean 14 1 ['github-actions'] nobody
1-65382
1 day ago
1-65499
1 day ago
0-27
27 seconds
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
1-62784
1 day ago
4-495
4 days ago
27-58977
27 days
36677 AlexeyMilovanov
author:AlexeyMilovanov
 feat(Computability.Partrec): add computability of Nat.find This PR bridges `Partrec.rfind` with total unbounded search (`Nat.find`). It adds: * `Computable.find`: Proves that `x ↦ Nat.find (h_ex x)` is computable for a computable decidable predicate `P`. * `Computable.rightInverse_of_surjective`: Proves that the right inverse of a computable surjective function is computable. t-computability new-contributor 31/0 Mathlib/Computability/Partrec.lean 1 5 ['AlexeyMilovanov', 'github-actions', 'vlad902'] nobody
1-62485
1 day ago
1-66957
1 day ago
1-66912
1 day
36137 smmercuri
author:smmercuri
 feat: define pullbacks of `HeightOneSpectrum` --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-ring-theory maintainer-merge 8/0 Mathlib/RingTheory/DedekindDomain/Ideal/Lemmas.lean 1 3 ['erdOne', 'github-actions'] erdOne
assignee:erdOne
1-60696
1 day ago
12-58921
12 days ago
12-58876
12 days
36676 euprunin
author:euprunin
 chore: replace long terminal `simp only […]`:s (≥3 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): * `Polynomial.map_comp`: unchanged 🎉 * `AlgebraicGeometry.IsClosedImmersion.Spec_iff`: 152 ms before, 107 ms after 🎉 * `nnnorm_pow_le`: unchanged 🎉 * `norm_pow_le`: unchanged 🎉 * `integral_sin`: unchanged 🎉 * `SimpleGraph.Subgraph.le_induce_union`: unchanged 🎉 * `ENNReal.iSup_add_iSup`: unchanged 🎉 * `ENat.iSup_add_iSup`: unchanged 🎉 * `ENat.mul_epow`: unchanged 🎉 * `EReal.abs_eq_zero_iff`: unchanged 🎉 * `Finset.disjoint_biUnion_left`: unchanged 🎉 * `List.splitOnP.go_acc`: unchanged 🎉 * `Multiset.count_map_eq_count`: unchanged 🎉 * `Nat.toDigitsCore_length`: unchanged 🎉 * `PartENat.pos_iff_one_le`: unchanged 🎉 * `Rat.intCast_div_self`: unchanged 🎉 * `Set.biUnion_empty_finset`: unchanged 🎉 * `Quot.subsingleton_iff`: unchanged 🎉 * `Equiv.Perm.support_closure_subset_union`: unchanged 🎉 * `Module.Basis.reindexRange_repr'`: unchanged 🎉 * `MeasureTheory.mul_le_addHaar_image_of_lt_det`: unchanged 🎉 * `MeasureTheory.memLp_finset_sum`: unchanged 🎉 * `MeasureTheory.exists_lt_lowerSemicontinuous_integral_lt`: 450 ms before, 404 ms after 🎉 * `BoundedContinuousFunction.toReal_lintegral_coe_eq_integral`: unchanged 🎉 * `nullMeasurableSet_region_between_oc`: unchanged 🎉 * `nullMeasurableSet_region_between_co`: unchanged 🎉 * `nullMeasurableSet_region_between_cc`: unchanged 🎉 * `MeasureTheory.integral_le_liminf_integral_of_forall_isOpen_measure_le_liminf_measure`: unchanged 🎉 * `padicValNat.pow_add_pow`: unchanged 🎉 * `Monotone.biUnion_Ico_Ioc_map_succ`: unchanged 🎉 * `ProbabilityTheory.condIndepSets_singleton_iff`: unchanged 🎉 * `ProbabilityTheory.sum_variance_truncation_le`: unchanged 🎉 * `IsLocalRing.CotangentSpace.span_image_eq_top_iff`: unchanged 🎉 * `galRestrict'_galLift`: 163 ms before, 48 ms after 🎉 * `Valuation.ne_zero_of_isUnit`: unchanged 🎉 * `hasProd_prod`: 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/) 38/38 Mathlib/Algebra/Polynomial/Eval/Defs.lean,Mathlib/AlgebraicGeometry/Morphisms/ClosedImmersion.lean,Mathlib/Analysis/Normed/Ring/Basic.lean,Mathlib/Analysis/SpecialFunctions/Integrals/Basic.lean,Mathlib/Combinatorics/SimpleGraph/Subgraph.lean,Mathlib/Data/ENNReal/Operations.lean,Mathlib/Data/ENat/Lattice.lean,Mathlib/Data/ENat/Pow.lean,Mathlib/Data/EReal/Inv.lean,Mathlib/Data/Finset/Union.lean,Mathlib/Data/List/SplitOn.lean,Mathlib/Data/Multiset/Filter.lean,Mathlib/Data/Nat/Digits/Defs.lean,Mathlib/Data/Nat/PartENat.lean,Mathlib/Data/Rat/Lemmas.lean,Mathlib/Data/Set/Constructions.lean,Mathlib/Data/Setoid/Basic.lean,Mathlib/GroupTheory/Perm/Finite.lean,Mathlib/LinearAlgebra/Basis/Defs.lean,Mathlib/MeasureTheory/Function/Jacobian.lean,Mathlib/MeasureTheory/Function/LpSeminorm/TriangleInequality.lean,Mathlib/MeasureTheory/Integral/Bochner/VitaliCaratheodory.lean,Mathlib/MeasureTheory/Integral/BoundedContinuousFunction.lean,Mathlib/MeasureTheory/Measure/Lebesgue/Basic.lean,Mathlib/MeasureTheory/Measure/Portmanteau.lean,Mathlib/NumberTheory/Multiplicity.lean,Mathlib/Order/SuccPred/IntervalSucc.lean,Mathlib/Probability/Independence/Conditional.lean,Mathlib/Probability/StrongLaw.lean,Mathlib/RingTheory/Ideal/Cotangent.lean,Mathlib/RingTheory/IntegralClosure/IntegralRestrict.lean,Mathlib/RingTheory/Valuation/Basic.lean,Mathlib/Topology/Algebra/InfiniteSum/Basic.lean 33 1 ['github-actions'] nobody
1-60272
1 day ago
1-71416
1 day ago
1-71371
1 day
36645 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): * `HomotopicalAlgebra.Cylinder.LeftHomotopy.weakEquivalence_iff`: unchanged 🎉 * `HomotopicalAlgebra.PathObject.RightHomotopy.weakEquivalence_iff`: unchanged 🎉 * `Finset.noncommProd_mulSingle`: unchanged 🎉 * `Finset.support_smulAntidiagonal_subset_smul`: unchanged 🎉 * `Function.updateFinset_updateFinset_of_subset`: unchanged 🎉 * `AlgebraicGeometry.PresheafedSpace.stalkMap.id`: 94 ms before, <30 ms after 🎉 * `IsUpperSet.total`: unchanged 🎉 * `MeasureTheory.IsStoppingTime.measurableSet_le_stopping_time`: 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/) 12/52 Mathlib/AlgebraicTopology/ModelCategory/LeftHomotopy.lean,Mathlib/AlgebraicTopology/ModelCategory/RightHomotopy.lean,Mathlib/Data/Finset/NoncommProd.lean,Mathlib/Data/Finset/SMulAntidiagonal.lean,Mathlib/Data/Finset/Update.lean,Mathlib/Geometry/RingedSpace/Stalks.lean,Mathlib/Order/UpperLower/Basic.lean,Mathlib/Probability/Process/Stopping.lean 8 1 ['github-actions'] nobody
1-60164
1 day ago
2-46488
2 days ago
2-46443
2 days
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 - [ ] depends on: #36137 - [x] depends on: #36184 - [ ] 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 526/112 Mathlib.lean,Mathlib/Algebra/GroupWithZero/Range.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/DedekindDomain/Ideal/Lemmas.lean,Mathlib/RingTheory/Valuation/Extension.lean,Mathlib/Topology/Algebra/Valued/WithVal.lean 10 8 ['github-actions', 'mathlib-merge-conflicts', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
1-60157
1 day ago
152-63413
152 days ago
0-13
13 seconds
36024 euprunin
author:euprunin
 chore: golf proofs The goal of this PR is to decrease the number of times lemmas are called explicitly (replacing calls to lemmas with calls to tactics). 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): * `Fin.coe_sub_one`: unchanged 🎉 * `LieAlgebra.engel_isBot_of_isMin.lieCharpoly_coeff_natDegree`: 66 ms before, 35 ms after 🎉 * `WithTop.mul_lt_mul`: unchanged 🎉 * `CFC.spectrum_nonempty`: unchanged 🎉 * `ODE.hasDerivWithinAt_picard_Icc`: unchanged 🎉 * `Matrix.vecMul_injective_iff_isUnit`: 240 ms before, 68 ms after 🎉 * `MeasureTheory.SimpleFunc.measure_preimage_lt_top_of_memLp`: unchanged 🎉 * `Polynomial.content_eq_gcd_range_of_lt`: unchanged 🎉 * `RingHom.finiteType_isStableUnderBaseChange`: 163 ms before, 49 ms after 🎉 * `RingHom.Flat.holdsForLocalizationAway`: 91 ms before, <30 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/) maintainer-merge 20/46 Mathlib/Algebra/Group/Fin/Basic.lean,Mathlib/Algebra/Lie/CartanExists.lean,Mathlib/Algebra/Order/Ring/WithTop.lean,Mathlib/Analysis/CStarAlgebra/ContinuousFunctionalCalculus/Instances.lean,Mathlib/Analysis/CStarAlgebra/ContinuousFunctionalCalculus/Order.lean,Mathlib/Analysis/CStarAlgebra/ContinuousFunctionalCalculus/Unital.lean,Mathlib/Analysis/ODE/PicardLindelof.lean,Mathlib/LinearAlgebra/Matrix/NonsingularInverse.lean,Mathlib/MeasureTheory/Function/SimpleFuncDenseLp.lean,Mathlib/RingTheory/Polynomial/Content.lean,Mathlib/RingTheory/RingHom/FiniteType.lean,Mathlib/RingTheory/RingHom/Flat.lean 12 14 ['euprunin', 'github-actions', 'mathlib-merge-conflicts', 'tb65536', 'vihdzp'] tb65536
assignee:tb65536
1-60113
1 day ago
8-33853
8 days ago
12-23835
12 days
35947 euprunin
author:euprunin
 chore: replace `aesop` with `grind` where the latter is significantly faster This experiment investigates the impact of replacing particularly heavy `aesop` calls with `grind`, specifically how this change affects the instruction count as measured by the benchmarking infrastructure. Trace profiling results (differences <30 ms considered measurement noise): * `Submonoid.mem_closure_image_one_lt_iff`: 125 ms before, 61 ms after 🎉 * `SimpleGraph.Connected.connected_delete_edge_of_not_isBridge`: 230 ms before, 51 ms after 🎉 * `SimpleGraph.Subgraph.IsMatching.exists_of_disjoint_sets_of_equiv`: 899 ms before, 666 ms after 🎉 * `SimpleGraph.IsCycles.existsUnique_ne_adj`: 855 ms before, 599 ms after 🎉 * `SimpleGraph.Walk.IsPath.isCycles_spanningCoe_toSubgraph_sup_edge`: 962 ms before, 619 ms after 🎉 * `SimpleGraph.IsAlternating.sup_edge`: 2854 ms before, 1615 ms after 🎉 * `SimpleGraph.Subgraph.IsPerfectMatching.symmDiff_of_isAlternating`: 3103 ms before, 1734 ms after 🎉 * `SimpleGraph.edgeSet_replaceVertex_of_not_adj`: 1525 ms before, 933 ms after 🎉 * `SimpleGraph.edgeSet_replaceVertex_of_adj`: 2194 ms before, 1605 ms after 🎉 * `SimpleGraph.tutte_exists_isPerfectMatching_of_near_matchings`: 3161 ms before, 1652 ms after 🎉 * `RootPairing.Base.sub_notMem_range_root`: 1025 ms before, 978 ms after 🎉 * `RootPairing.EmbeddedG2.mem_allRoots`: 3832 ms before, 3255 ms after 🎉 * `RootSystem.GeckConstruction.Lemmas.0.RootPairing.chainBotCoeff_mul_chainTopCoeff.aux_2`: 3572 ms before, 2631 ms after 🎉 * `isCompact_generateFrom`: 1987 ms before, 763 ms after 🎉 * `IsCompactOpenCovered.of_isCompact_of_forall_exists_isCompactOpenCovered`: 2279 ms before, 2009 ms after 🎉 * `UniformContinuousOn.comp_tendstoUniformly_eventually`: 416 ms before, 151 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/) 27/27 Mathlib/Algebra/Group/Irreducible/Indecomposable.lean,Mathlib/Combinatorics/SimpleGraph/Connectivity/Connected.lean,Mathlib/Combinatorics/SimpleGraph/Matching.lean,Mathlib/Combinatorics/SimpleGraph/Operations.lean,Mathlib/Combinatorics/SimpleGraph/Tutte.lean,Mathlib/LinearAlgebra/RootSystem/Base.lean,Mathlib/LinearAlgebra/RootSystem/Finite/G2.lean,Mathlib/LinearAlgebra/RootSystem/GeckConstruction/Lemmas.lean,Mathlib/Topology/Compactness/Compact.lean,Mathlib/Topology/Sets/CompactOpenCovered.lean,Mathlib/Topology/UniformSpace/UniformConvergenceTopology.lean 11 4 ['euprunin', 'github-actions', 'leanprover-radar', 'vihdzp'] joelriou
assignee:joelriou
1-60087
1 day ago
15-22711
15 days ago
15-22666
15 days
35731 euprunin
author:euprunin
 chore: golf using `exact`/`simpa` The goal of this PR is to decrease the number of times lemmas are called explicitly (replacing calls to lemmas with calls to tactics). 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.Cover.exists_of_trans_eq_trans`: unchanged 🎉 * `AlgebraicGeometry.compactSpace_iff_exists`: unchanged 🎉 * `SimplexCategory.eq_id_of_mono`: unchanged 🎉 * `SimplexCategory.eq_id_of_epi`: unchanged 🎉 * `CategoryTheory.GrothendieckTopology.isIso_toPlus_of_isSheaf`: unchanged 🎉 * `CategoryTheory.Functor.isTriangulated_of_op`: unchanged 🎉 * `SimpleGraph.chromaticNumber_top`: unchanged 🎉 * `SimpleGraph.Subgraph.singletonSubgraph_connected`: unchanged 🎉 * `SimpleGraph.Walk.exists_length_eq_one_iff`: unchanged 🎉 * `Turing.TM2to1.addBottom_modifyNth`: unchanged 🎉 * `IsNoetherian.iff_fg`: unchanged 🎉 * `contMDiff_inclusion`: unchanged 🎉 * `FermatLastTheoremForThree_of_FermatLastTheoremThreeGen`: 146 ms before, 91 ms after 🎉 * `FermatLastTheoremForThreeGen.lambda_sq_dvd_c`: 313 ms before, 218 ms after 🎉 * `WithTop.isGLB_sInf`: unchanged 🎉 * `WithBot.succ_eq_bot`: 56 ms before, <30 ms after 🎉 * `WithTop.pred_eq_top`: 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/) 22/91 Mathlib/AlgebraicGeometry/Cover/Directed.lean,Mathlib/AlgebraicGeometry/Morphisms/QuasiCompact.lean,Mathlib/AlgebraicTopology/SimplexCategory/Basic.lean,Mathlib/CategoryTheory/Sites/Plus.lean,Mathlib/CategoryTheory/Triangulated/Opposite/Functor.lean,Mathlib/Combinatorics/SimpleGraph/Coloring.lean,Mathlib/Combinatorics/SimpleGraph/Connectivity/Subgraph.lean,Mathlib/Combinatorics/SimpleGraph/Walks/Basic.lean,Mathlib/FieldTheory/Finiteness.lean,Mathlib/Geometry/Manifold/ContMDiff/Basic.lean,Mathlib/NumberTheory/FLT/Three.lean,Mathlib/Order/ConditionallyCompleteLattice/Basic.lean,Mathlib/Order/SuccPred/WithBot.lean 13 25 ['euprunin', 'github-actions', 'leanprover-radar', 'robin-carlier', 'vihdzp'] robin-carlier
assignee:robin-carlier
1-60070
1 day ago
8-79187
8 days ago
11-46534
11 days
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 546/113 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/DedekindDomain/Ideal/Lemmas.lean,Mathlib/RingTheory/Valuation/Extension.lean,Mathlib/Topology/Algebra/Valued/WithVal.lean 11 3 ['github-actions', 'mathlib-dependent-issues', 'mathlib-merge-conflicts'] nobody
1-60031
1 day ago
7-44860
7 days ago
0-264
4 minutes
30551 smmercuri
author:smmercuri
 feat: dimension formulae for infinite places above --- - [x] depends on: #27978 - [x] depends on: #27974 - [x] depends on: #29942 - [x] depends on: #29946 - [x] depends on: #36132 - [x] depends on: #36257 - [x] depends on: #36268 - [ ] depends on: #36353 - [x] depends on: #36393 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) blocked-by-other-PR 320/39 Mathlib.lean,Mathlib/Data/Set/Card.lean,Mathlib/Logic/Function/Basic.lean,Mathlib/NumberTheory/NumberField/Completion/InfinitePlace.lean,Mathlib/NumberTheory/NumberField/Completion/LiesOverInstances.lean,Mathlib/NumberTheory/NumberField/Completion/Ramification.lean,Mathlib/NumberTheory/NumberField/InfinitePlace/Embeddings.lean,Mathlib/NumberTheory/NumberField/InfinitePlace/Ramification.lean 8 8 ['github-actions', 'mathlib-dependent-issues', 'mathlib-merge-conflicts', 'mathlib4-merge-conflict-bot'] nobody
1-59814
1 day ago
153-51094
153 days ago
0-10
10 seconds
36290 euprunin
author:euprunin
 chore(AlgebraicGeometry): unsqueeze terminal `simp`:s (`simp only […]` to `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): * `AlgebraicGeometry.IsClosedImmersion.Spec_iff`: 141 ms before, 108 ms after 🎉 * `AlgebraicGeometry.ProjIsoSpecTopComponent.FromSpec.carrier.denom_notMem`: 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/) t-algebraic-geometry ready-to-merge 2/2 Mathlib/AlgebraicGeometry/Morphisms/ClosedImmersion.lean,Mathlib/AlgebraicGeometry/ProjectiveSpectrum/Scheme.lean 2 4 ['github-actions', 'joelriou', 'mathlib-bors'] alexjbest
assignee:alexjbest
1-59784
1 day ago
1-76260
1 day ago
8-50409
8 days
35072 vasnesterov
author:vasnesterov
 feat(Tactic/ComputeAsymptotics/Multiseries): non-primitive corecursion for `Seq`: `FriendlyOperation` API This is a continuation of #34311. This PR adds more API about friendly operations: * `FriendlyOperation.destruct`: a "coinductive destructor" for `FriendlyOperation` * `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. --- 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 297/2 Mathlib/Tactic/ComputeAsymptotics/Multiseries/Corecursion.lean 1 33 ['Vierkantor', 'github-actions', 'joneugster', 'vasnesterov'] joneugster
assignee:joneugster
1-59332
1 day ago
7-49298
7 days ago
21-50531
21 days
28291 vasnesterov
author:vasnesterov
 feat(Tactic): tactic for computing asymptotics of real functions It's an auxiliary PR which 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: #34922 - [ ] depends on: #35072 - [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 merge-conflict 12797/70 Mathlib.lean,Mathlib/Analysis/Analytic/Constructions.lean,Mathlib/Analysis/Analytic/OfScalars.lean,Mathlib/Analysis/Asymptotics/AsymptoticEquivalent.lean,Mathlib/Analysis/Normed/Operator/Basic.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/LeadingTerm.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/LeadingTerm.lean,Mathlib/Tactic/ComputeAsymptotics/Multiseries/LogBasis.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/Term.lean,Mathlib/Tactic/ComputeAsymptotics/Multiseries/Trimming.lean,Mathlib/Topology/Basic.lean,MathlibTest/compute_asymptotics.lean 42 19 ['github-actions', 'grunweg', 'mathlib-merge-conflicts', 'mathlib4-dependent-issues-bot', 'ocfnash', 'vasnesterov'] nobody
1-59081
1 day ago
216-60861
216 days ago
0-54
54 seconds
36275 smmercuri
author:smmercuri
 feat: norm for the finite adele ring of a number field --- - [ ] depends on: #35820 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) blocked-by-other-PR 184/8 Mathlib.lean,Mathlib/NumberTheory/NumberField/Completion/FinitePlace.lean,Mathlib/NumberTheory/NumberField/FiniteAdeleRing.lean,Mathlib/RingTheory/DedekindDomain/FiniteAdeleRing.lean,Mathlib/Topology/Algebra/Valued/NormedValued.lean 5 3 ['github-actions', 'mathlib-dependent-issues', 'mathlib-merge-conflicts'] nobody
1-57596
1 day ago
10-54902
10 days ago
0-8
8 seconds
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 245/10 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 7 6 ['github-actions', 'mathlib-dependent-issues', 'mathlib-merge-conflicts'] nobody
1-57581
1 day ago
38-67929
38 days ago
0-10
10 seconds
36682 harahu
author:harahu
 chore(Data): avoid lazy continuation in md lists We replace lazy continuation lines in lists with either: - indented lines, to signify that the line is indeed a continuation line; or - a newline, where the continuation line(s) were in fact intended to be disconnected from the list. We do this because lazy continuation is a markdown footgun that one does well to avoid. We also standardize indentation such that continuation lines now line up with the first line of the item they're continuing. This seems to be the solution enforced by markdown formatters, e.g. `mdformat`. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-data 24/14 Mathlib/Data/Bracket.lean,Mathlib/Data/Fin/Basic.lean,Mathlib/Data/Fin/FlagRange.lean,Mathlib/Data/Finset/Density.lean,Mathlib/Data/Finsupp/MonomialOrder.lean,Mathlib/Data/Finsupp/MonomialOrder/DegLex.lean,Mathlib/Data/Multiset/DershowitzManna.lean,Mathlib/Data/NNRat/Defs.lean,Mathlib/Data/PNat/Xgcd.lean,Mathlib/Data/Part.lean,Mathlib/Data/Stream/Defs.lean 11 1 ['github-actions'] nobody
1-56149
1 day ago
1-56226
1 day ago
1-56181
1 day
35858 vihdzp
author:vihdzp
 doc(SetTheory/Ordinal/Arithmetic): improve documentation This PR does the following: - Use better variable names in the docs (instead of just variants of the letter `o`). - Remove mentions of things defined in other files, or specify that they are defined on other files. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) documentation t-set-theory delegated 14/21 Mathlib/SetTheory/Ordinal/Arithmetic.lean 1 5 ['b-mehta', 'github-actions', 'mathlib-bors', 'mathlib-merge-conflicts'] alreadydone
assignee:alreadydone
1-55713
1 day ago
16-15965
16 days ago
17-22635
17 days
36684 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.classifier_isSheaf`: unchanged 🎉 * `EuclideanGeometry.orthogonalProjection_vadd_eq_self`: unchanged 🎉 * `AEMeasurable.map_add₀`: unchanged 🎉 * `PrimitiveSpectrum.hull_inf`: 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/) 6/21 Mathlib/CategoryTheory/Sites/Closed.lean,Mathlib/Geometry/Euclidean/Projection.lean,Mathlib/MeasureTheory/Measure/AEMeasurable.lean,Mathlib/Topology/Order/HullKernel.lean 4 1 ['github-actions'] nobody
1-54875
1 day ago
1-54942
1 day ago
1-54897
1 day
36640 euprunin
author:euprunin
 chore: replace long terminal `rw […]`:s (≥5 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): * `CategoryTheory.Functor.reflectsMonomorphisms.of_iso`: unchanged 🎉 * `CategoryTheory.Functor.reflectsEpimorphisms.of_iso`: unchanged 🎉 * `Orientation.oangle_add_right_smul_rotation_pi_div_two`: unchanged 🎉 * `Equiv.Perm.IsCycle.sign`: unchanged 🎉 * `sdiff_sdiff_right`: unchanged 🎉 * `dvd_coeff_zero_of_aeval_eq_prime_smul_of_minpoly_isEisensteinAt`: 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 6/7 Mathlib/CategoryTheory/Functor/EpiMono.lean,Mathlib/Geometry/Euclidean/Angle/Oriented/RightAngle.lean,Mathlib/GroupTheory/Perm/Cycle/Basic.lean,Mathlib/Order/BooleanAlgebra/Basic.lean,Mathlib/RingTheory/Polynomial/Eisenstein/IsIntegral.lean 5 4 ['erdOne', 'euprunin', 'github-actions'] nobody
1-53783
1 day ago
2-62935
2 days ago
2-62890
2 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/) 10/51 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 1 ['github-actions'] nobody
1-52920
1 day ago
1-52989
1 day ago
1-52944
1 day
36674 EtienneC30
author:EtienneC30
 feat: telescopic product/sum over Fin --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra t-data large-import
label:t-algebra$
 42/4 Archive/Imo/Imo1987Q1.lean,Mathlib/Algebra/BigOperators/Fin.lean,Mathlib/Algebra/BigOperators/Intervals.lean,Mathlib/AlgebraicTopology/DoldKan/Decomposition.lean,Mathlib/Data/Fintype/BigOperators.lean,Mathlib/SetTheory/Ordinal/Arithmetic.lean 6 3 ['EtienneC30', 'eric-wieser', 'github-actions'] nobody
1-52523
1 day ago
1-52588
1 day ago
1-78731
1 day
24373 YaelDillies
author:YaelDillies
 refactor: golf `modularCharacter` ... using the lessons learned from `distribHaarChar`. Unfortunately, the two setups can't quite be unified because we are lacking an additive version of `MulDistribMulAction`. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) awaiting-CI t-measure-probability 77/45 Mathlib/MeasureTheory/Group/MeasurableEquiv.lean,Mathlib/MeasureTheory/Group/Measure.lean,Mathlib/MeasureTheory/Group/ModularCharacter.lean,Mathlib/MeasureTheory/Integral/Bochner/Basic.lean,Mathlib/MeasureTheory/Measure/Haar/Unique.lean 5 5 ['github-actions', 'leanprover-community-bot-assistant', 'mathlib-merge-conflicts', 'mathlib4-merge-conflict-bot'] nobody
1-50924
1 day ago
unknown
0-0
0 seconds
24383 YaelDillies
author:YaelDillies
 feat: distributive Haar characters of `ℝ` and `ℂ` Compute `distribHaarChar` in the case of the actions of `ℝˣ` on `ℝ` and of `ℂˣ` on `ℂ`. The file I'm moving was added two days ago and is not yet used in FLT. From FLT --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) WIP awaiting-CI t-measure-probability file-removed FLT 211/80 Mathlib.lean,Mathlib/Algebra/BigOperators/GroupWithZero/Action.lean,Mathlib/Algebra/Group/Action/BigOperators.lean,Mathlib/MeasureTheory/Measure/Haar/DistribChar/Basic.lean,Mathlib/MeasureTheory/Measure/Haar/DistribChar/Complex.lean,Mathlib/MeasureTheory/Measure/Haar/DistribChar/Real.lean,Mathlib/MeasureTheory/Measure/Lebesgue/Basic.lean,Mathlib/MeasureTheory/Measure/Lebesgue/EqHaar.lean 8 27 ['YaelDillies', 'github-actions', 'kbuzzard', 'leanprover-community-bot-assistant', 'mathlib-merge-conflicts', 'mathlib4-merge-conflict-bot', 'sgouezel'] nobody
1-50813
1 day ago
313-76129
313 days ago
0-12994
3 hours
21342 YaelDillies
author:YaelDillies
 refactor(Normed/Group/Quotient): generalise to non-abelian groups The goal is to apply this to free groups, whose multiplication in either argument is an isometry, but isn't commutative. --- - [x] depends on: #21341 - [ ] depends on: #35037 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-analysis 97/70 Mathlib/Analysis/Normed/Group/Quotient.lean,Mathlib/Analysis/Normed/Group/Uniform.lean,Mathlib/GroupTheory/GroupAction/Quotient.lean,Mathlib/Topology/Algebra/ConstMulAction.lean,Mathlib/Topology/Algebra/Group/Quotient.lean,Mathlib/Topology/Bornology/BoundedOperation.lean 6 12 ['YaelDillies', 'github-actions', 'leanprover-community-bot-assistant', 'mathlib-dependent-issues', 'mathlib-merge-conflicts', 'mathlib4-merge-conflict-bot', 'sgouezel'] sgouezel
assignee:sgouezel
1-50689
1 day ago
19-61495
19 days ago
11-70193
11 days
19475 YaelDillies
author:YaelDillies
 feat: group markings From LeanCamCombi --- - [ ] depends on: #21342 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) WIP t-algebra blocked-by-other-PR
label:t-algebra$
 270/70 Mathlib.lean,Mathlib/Analysis/Normed/Group/Quotient.lean,Mathlib/Analysis/Normed/Group/Uniform.lean,Mathlib/Geometry/Group/Marking.lean,Mathlib/GroupTheory/GroupAction/Quotient.lean,Mathlib/Topology/Algebra/ConstMulAction.lean,Mathlib/Topology/Algebra/Group/Quotient.lean,Mathlib/Topology/Bornology/BoundedOperation.lean 8 16 ['YaelDillies', 'b-mehta', 'github-actions', 'leanprover-community-bot-assistant', 'mathlib-merge-conflicts', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
1-50648
1 day ago
409-51734
409 days ago
22-16818
22 days
36083 gasparattila
author:gasparattila
 feat: decomposition of `ContinuousAffineMap` as an `Equiv` This PR defines an equivalence `(V →ᴬ[R] Q) ≃ Q × (V →L[R] W)`, plus `LinearEquiv` and `AffineEquiv` variants. To match the names of the new equivalences, `ContinuousAffineMap.toConstProdLinearMap` is also renamed. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) 154/13 Mathlib/Analysis/Normed/Affine/ContinuousAffineMap.lean,Mathlib/Topology/Algebra/ContinuousAffineMap.lean 2 5 ['dupuisf', 'gasparattila', 'github-actions'] dupuisf
assignee:dupuisf
1-49861
1 day ago
13-24502
13 days ago
13-26410
13 days
36685 wwylele
author:wwylele
 refactor(Analysis/Lp): EuclideanSpace.single -> PiLp.single Resolving a TODO in the code. This also makes `PiLp.single` the simp-normal form, as opposite to `toLp _ (Pi.single _ _)` that was in the code. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-analysis 136/56 Mathlib/Analysis/CStarAlgebra/Matrix.lean,Mathlib/Analysis/InnerProductSpace/PiL2.lean,Mathlib/Analysis/Matrix/Spectrum.lean,Mathlib/Analysis/Normed/Lp/PiLp.lean 4 1 ['github-actions'] nobody
1-48868
1 day ago
1-52293
1 day ago
1-53160
1 day
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 46/33 Mathlib/Order/Sublocale.lean 1 4 ['Bergschaf', 'YaelDillies', 'github-actions'] nobody
1-47935
1 day ago
8-49783
8 days ago
8-50182
8 days
35323 martinwintermath
author:martinwintermath
 feat(Geometry/Convex/Cone): Add lemmas for PointedCone.dual Add several useful lemmas for `PointedCone.dual` in preparation for duality theory for FG cones. Some other changes are: * renamed `dual_le_dual` to `dual_anti` and added partner lemma `dual_antitone` * removed TODO comment since the stated lemma is not sufficient to prove the claim, an also this has now been proven and will become a PR in the near future. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-convex-geometry maintainer-merge 37/6 Mathlib/Geometry/Convex/Cone/Dual.lean 1 23 ['YaelDillies', 'github-actions', 'martinwintermath'] YaelDillies
assignee:YaelDillies
1-47269
1 day ago
11-80803
11 days ago
17-60628
17 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
1-47165
1 day ago
9-69939
9 days ago
0-80618
22 hours
33958 chrisflav
author:chrisflav
 feat(AlgebraicGeometry): the small affine étale site From Proetale. Co-authored-by: Joël Riou This is a draft. --- - [x] depends on: #35711 - [x] depends on: #35240 - [x] depends on: #34976 - [x] depends on: #33957 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) WIP t-algebraic-geometry merge-conflict 454/23 Mathlib.lean,Mathlib/AlgebraicGeometry/Morphisms/Etale.lean,Mathlib/AlgebraicGeometry/Scheme.lean,Mathlib/AlgebraicGeometry/Sites/AffineEtale.lean,Mathlib/CategoryTheory/Abelian/GrothendieckAxioms/Sheaf.lean,Mathlib/CategoryTheory/Limits/Constructions/Over/Connected.lean,Mathlib/CategoryTheory/Limits/MorphismProperty.lean,Mathlib/CategoryTheory/MorphismProperty/Comma.lean,Mathlib/CategoryTheory/ObjectProperty/Small.lean 9 7 ['github-actions', 'joelriou', 'mathlib-dependent-issues', 'mathlib-merge-conflicts', 'mathlib4-merge-conflict-bot'] nobody
1-46769
1 day ago
61-70668
61 days ago
0-333
5 minutes
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 1656/0 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 6 3 ['github-actions', 'mathlib-bors'] nobody
1-45137
1 day ago
24-23590
24 days ago
0-6
6 seconds
36611 AntoineChambert-Loir
author:AntoineChambert-Loir
 feat(Data/Nat/Choose/Multinomial): rename Multiset.multinomial Rename `Multiset.multinomial` to `Multiset.countPerms`. See Zulip thread : [#mathlib4 > Multinomial coefficients](https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/Multinomial.20coefficients/with/576343071) This will be used in #35830 to allow another, more natural, definition of `Multiset.multinomial`. Co-authored with: @mariainesdff --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) 24/22 Mathlib/Analysis/Calculus/ContDiff/Bounds.lean,Mathlib/Data/Nat/Choose/Multinomial.lean 2 14 ['AntoineChambert-Loir', 'SnirBroshi', 'github-actions', 'vihdzp'] nobody
1-44812
1 day ago
1-44877
1 day ago
3-42156
3 days
36609 JovanGerb
author:JovanGerb
 chore(Order/Hom/Lattice): clean up `to_dual` use This PR cleans up the use of `to_dual` for `LatticeHom` after #36159, avoiding `to_dual existing` where this is not needed. Another benefit of this PR is that `LatticeHom.toInfHom` now becomes reducible, just like `LatticeHom.toSupHom`, as a result of generating it with `extends`. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-order 13/41 Mathlib/Order/Hom/Basic.lean,Mathlib/Order/Hom/Lattice.lean 2 2 ['github-actions', 'vihdzp'] nobody
1-44361
1 day ago
3-36151
3 days ago
3-41543
3 days
36574 Jun2M
author:Jun2M
 feat(Order/Partition): add refinement order and set partition API This PR expands the API for `Partition s` (partitions of an element `s` in a complete lattice, and specifically partitions of a set). **Main changes:** * **Order instances**: Introduces a `PartialOrder (Partition s)` instance where partitions are ordered by refinement (`P ≤ Q` if every part of `P` is contained in a part of `Q`). Also adds an `OrderTop` instance where the top partition consists of the single part `s`. * **Set partition API**: Adds a `Set` section with various useful lemmas for working with partitions of sets. * **Induced relation**: Defines `Partition.Rel`, a transitive and symmetric binary relation (partial equivalence relation) induced by a partition of a set. * **Representative functions**: Defines `Partition.IsRepFun`, a predicate characterizing when a function maps each element to a canonical representative in its equivalence class. Co-authored-by: Peter Nelson --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-order 318/14 Mathlib/Order/Partition/Basic.lean 1 1 ['github-actions'] nobody
1-43412
1 day ago
2-9082
2 days ago
4-14009
4 days
36689 martinwintermath
author:martinwintermath
 feat(Algebra/Module/Submodule): Submodules over a ring are modular elements in the lattice of submodules over a semiring Add lemmas that state that submodules over a sub-ring `S` of a semiring `R` are modular elements in the lattice of submodules over the semiring `R`, that is, they satisfy the modular law. There are two new lemmas. Let `s` and `t` are `R`-submodules, and `p` is an `S`-submodule: * `sup_inf_assoc_of_le_restrictScalars`: if `s ≤ p` then `s ⊔ (t ⊓ p) = (s ⊔ t) ⊓ p` (i.e., `p` is right-modular) * `inf_sup_assoc_of_restrictScalars_le`: if `p ≤ s` then `s ⊓ (t ⊔ p) = (s ⊓ t) ⊔ p` (i.e., `p` is left-modular) I am not aware of an implementation of right/left-modular elements, so I stated the lemmas without using the language of modular lattices. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra
label:t-algebra$
 51/0 Mathlib/Algebra/Module/Submodule/RestrictScalars.lean 1 1 ['github-actions'] nobody
1-43039
1 day ago
1-43039
1 day ago
1-42994
1 day
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 8702/323 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/Finsupp/PointwiseSMul.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 45 30 ['github-actions', 'leanprover-community-bot-assistant', 'mathlib-merge-conflicts', 'mathlib4-merge-conflict-bot'] nobody
1-42986
1 day ago
277-43392
277 days ago
0-2
2 seconds
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
1-42739
1 day ago
115-65272
115 days ago
70-24709
70 days
36688 joelriou
author:joelriou
 feat(CategoryTheory/Monoidal): tensor product of cokernels --- - [ ] depends on: #36680 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-category-theory blocked-by-other-PR 172/0 Mathlib.lean,Mathlib/CategoryTheory/Limits/Preserves/BifunctorCokernel.lean,Mathlib/CategoryTheory/Monoidal/Limits/Cokernels.lean,Mathlib/CategoryTheory/Monoidal/Preadditive.lean 4 2 ['github-actions', 'mathlib-dependent-issues'] nobody
1-42502
1 day ago
1-44018
1 day ago
1-43973
1 day
36691 Jun2M
author:Jun2M
 feat(Order.Partition.Basic): add `rep`, `partOf`, and prove `IsRepFun` existence This PR expands the API for `Setoid.Partition` (or `Partition`) by introducing definitions and lemmas for working with representatives and specific parts of a partition. ### Key Additions * **`Partition.rep`**: Noncomputably chooses a representative from a given part of a partition, along with basic membership lemmas (`rep_mem`, `rep_mem'`). * **`Partition.partOf`**: Defines the part of a partition containing a specific element (evaluates to `∅` if the element is not in the underlying set). * **`IsRepFun` extensions**: * `exists_extend_partial` / `exists_extend_partial'`: Proves that partially defined representative functions can be extended to complete ones. * `nonempty`: Proves that every partition admits at least one representative function. Co-authored-by: Peter Nelson --- - [ ] depends on: #36574 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) blocked-by-other-PR t-order 443/14 Mathlib/Order/Partition/Basic.lean 1 2 ['github-actions', 'mathlib-dependent-issues'] nobody
1-41897
1 day ago
1-42505
1 day ago
0-233
3 minutes
36264 kebekus
author:kebekus
 feat: introduce canonical factors, a.k.a. "Blaschke factors", as used in complex analysis Introduce canonical factors, also known as "Blaschke factors", used in complex analysis when discussing meromorphic functions defined on spheres. This material is used in [Project VD](https://github.com/kebekus/ProjectVD), formalizing Value Distribution Theory for meromorphic functions on the complex plane. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-analysis 172/0 Mathlib.lean,Mathlib/Analysis/Complex/CanonicalDecomposition.lean 2 1 ['github-actions'] j-loreaux
assignee:j-loreaux
1-38175
1 day ago
10-60335
10 days ago
10-60290
10 days
36489 yoh-tanimoto
author:yoh-tanimoto
 feat(Order/Partition/Finpartition): add `toSubtype` constructor add `Finpartition` constructor in `Subtype pr` for `pr : Set X → Prop` such that `pr` is closed under intersection and union and `pr ⊥` holds from a `P : Finpartition s` with explicit assumptions that `hs: pr s` and `pr p` for each part `p`. In other words, this obtains `Finpartition ⟨s, hs⟩` from `P`. This splits from #26160. t-order 113/0 Mathlib/Data/Finset/Lattice/Fold.lean,Mathlib/Data/Finset/Preimage.lean,Mathlib/Order/Disjoint.lean,Mathlib/Order/Lattice.lean,Mathlib/Order/Partition/Finpartition.lean 5 11 ['EtienneC30', 'github-actions', 'yoh-tanimoto'] nobody
1-36987
1 day ago
1-36751
1 day ago
1-37315
1 day
36693 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): * `Equiv.Perm.ofSubtype_swap_eq`: unchanged 🎉 * `Filter.hasBasis_biInf_of_directed'`: 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/) 2/15 Mathlib/GroupTheory/Perm/Support.lean,Mathlib/Order/Filter/Bases/Basic.lean 2 1 ['github-actions'] nobody
1-35999
1 day ago
1-36065
1 day ago
1-36020
1 day
36653 Ljon4ik4
author:Ljon4ik4
 feat: LieDerivations of Lie Algebras obtained by BaseChange Let $R$ be a commutative ring. Given a commutative $R$-algebra $A$ and an $R$-Lie algebra $L$, there is a natural Lie algebra structure on $A\otimes_R L$. In this file we add the facts that derivations of $A$, as well as Lie Derivations of $L$ induce Lie derivations of $A\otimes_R L$. The corresponding assignments are Lie algebra homomorphisms. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra new-contributor
label:t-algebra$
 131/0 Mathlib.lean,Mathlib/Algebra/Lie/Derivation/BaseChange.lean 2 3 ['github-actions', 'mathlib-merge-conflicts'] nobody
1-34358
1 day ago
1-34387
1 day ago
2-17233
2 days
36019 stepan2698-cpu
author:stepan2698-cpu
 chore: update undergrad.yaml Adds links to various algebraic subjects which are listed in undergrad.yaml as missing from mathlib. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) 15/14 docs/undergrad.yaml 1 5 ['SnirBroshi', 'github-actions', 'robin-carlier', 'stepan2698-cpu'] robin-carlier
assignee:robin-carlier
1-34233
1 day ago
1-34233
1 day ago
11-31570
11 days
34396 dupuisf
author:dupuisf
 feat: notation for `Ring.inverse` This PR adds the notation `x⁻¹ʳ` for `Ring.inverse x`, scoped to the namespace `Ring`, and a few extra API lemmas about it. See the [Zulip discussion](https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/LawfulInv/near/569123171) about this. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra
label:t-algebra$
 149/87 Mathlib/Algebra/Algebra/Spectrum/Basic.lean,Mathlib/Algebra/GroupWithZero/Commute.lean,Mathlib/Algebra/GroupWithZero/Invertible.lean,Mathlib/Algebra/GroupWithZero/Units/Basic.lean,Mathlib/Algebra/GroupWithZero/Units/Lemmas.lean,Mathlib/Algebra/Ring/Invertible.lean,Mathlib/Algebra/Star/Basic.lean,Mathlib/Analysis/Analytic/Constructions.lean,Mathlib/Analysis/CStarAlgebra/ContinuousFunctionalCalculus/Unital.lean,Mathlib/Analysis/Calculus/FDeriv/Mul.lean,Mathlib/Analysis/Normed/Algebra/Exponential.lean,Mathlib/Analysis/Normed/Algebra/GelfandFormula.lean,Mathlib/Analysis/Normed/Ring/Units.lean,Mathlib/Analysis/SpecificLimits/Normed.lean,Mathlib/LinearAlgebra/Matrix/Charpoly/Coeff.lean,Mathlib/LinearAlgebra/Matrix/NonsingularInverse.lean,Mathlib/NumberTheory/MulChar/Basic.lean,Mathlib/RepresentationTheory/Maschke.lean,Mathlib/RingTheory/Henselian.lean,Mathlib/Topology/Algebra/Module/Equiv.lean 20 1 ['github-actions'] nobody
1-33611
1 day ago
51-5269
51 days ago
0-1
1 second
33501 SnirBroshi
author:SnirBroshi
 feat(Combinatorics/SimpleGraph/Finite): degrees for infinite graphs - Redefine degrees using `Set.ncard` to avoid `Fintype` and enable talking about degrees in infinite graphs. - Define `ENat` versions of `degree`/`minDegree`/`maxDegree` called `edegree`/`eminDegree`/`emaxDegree` respectively. - Remove `LocallyFinite` assumption from `IsRegularOfDegree`, and change it to use `edegree = k` instead of `degree = k` to retain the meaning of the case `k = 0`. --- The `e` prefix matches the existing `edist` and `ediam`. To make reviewing easier, this PR intentionally does not: - Add theorems about the new definitions - Reorder theorems to avoid `omit`s - Move theorems to a new `Degree.lean` file This is so that the diff shows the old/new versions side-by-side, and to avoid a bigger PR. Consequently a few proofs are a bit longer, but that'll be fixed after this PR by adding API lemmas for the new definitions (e.g. `edegree ≠ ⊤ → edegree = degree`). Regarding computability: If computability of degrees is useful, we can introduce a separate `findegree` in the future (similar to `neighborSet` vs `neighborFinset`), but I think degrees are a basic graph definition that should be defined for any `SimpleGraph`. As for theorems, such a `findegree` can use a lemma `findegree = degree` to access all the degree theorems, instead of duplicating everything to both versions. This PR was motivated by wanting to talk about infinite graphs with a finite max-degree. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) large-import t-combinatorics awaiting-author merge-conflict 352/259 Archive/Wiedijk100Theorems/FriendshipGraphs.lean,Archive/Wiedijk100Theorems/Konigsberg.lean,Counterexamples/HeawoodUnitDistance.lean,Mathlib/Combinatorics/SimpleGraph/Acyclic.lean,Mathlib/Combinatorics/SimpleGraph/AdjMatrix.lean,Mathlib/Combinatorics/SimpleGraph/Bipartite.lean,Mathlib/Combinatorics/SimpleGraph/Circulant.lean,Mathlib/Combinatorics/SimpleGraph/Connectivity/Connected.lean,Mathlib/Combinatorics/SimpleGraph/DegreeSum.lean,Mathlib/Combinatorics/SimpleGraph/Extremal/Turan.lean,Mathlib/Combinatorics/SimpleGraph/Finite.lean,Mathlib/Combinatorics/SimpleGraph/FiveWheelLike.lean,Mathlib/Combinatorics/SimpleGraph/IncMatrix.lean,Mathlib/Combinatorics/SimpleGraph/LapMatrix.lean,Mathlib/Combinatorics/SimpleGraph/Maps.lean,Mathlib/Combinatorics/SimpleGraph/Prod.lean,Mathlib/Combinatorics/SimpleGraph/StronglyRegular.lean,Mathlib/Combinatorics/SimpleGraph/Subgraph.lean,Mathlib/Combinatorics/SimpleGraph/Trails.lean,Mathlib/Data/Set/Card.lean,Mathlib/Data/Set/Insert.lean,Mathlib/Order/ConditionallyCompleteLattice/Finset.lean 22 26 ['SnirBroshi', 'YaelDillies', 'b-mehta', 'github-actions', 'mathlib-merge-conflicts', 'mathlib4-merge-conflict-bot', 'vlad902'] nobody
1-32151
1 day ago
43-80476
43 days ago
14-30359
14 days
36087 matthewjasper
author:matthewjasper
 chore: fix diamonds for Real/Complex Algebra instances Unfold or make `implicit_reducible` some definitions used to define `Algebra ℝ ℂ` . This should allow reducing use of `set_option backward.isDefEq.respectTransparency false`. --- - [ ] depends on: #36694 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) blocked-by-other-PR 73/49 Mathlib/Algebra/Algebra/Defs.lean,Mathlib/Algebra/Algebra/Pi.lean,Mathlib/Algebra/Algebra/Prod.lean,Mathlib/Algebra/Algebra/RestrictScalars.lean,Mathlib/Algebra/Category/ModuleCat/Algebra.lean,Mathlib/Analysis/Calculus/MeanValue.lean,Mathlib/Analysis/Complex/Basic.lean,Mathlib/Analysis/LocallyConvex/SeparatingDual.lean,Mathlib/Analysis/Normed/Module/Basic.lean,Mathlib/Analysis/Normed/Module/HahnBanach.lean,Mathlib/Analysis/RCLike/Lemmas.lean,Mathlib/Analysis/SpecialFunctions/ContinuousFunctionalCalculus/ExpLog/Basic.lean,Mathlib/Data/Complex/Basic.lean,Mathlib/FieldTheory/PurelyInseparable/Basic.lean,Mathlib/FieldTheory/SeparableDegree.lean,Mathlib/LinearAlgebra/Complex/Module.lean,Mathlib/RingTheory/IsTensorProduct.lean,Mathlib/RingTheory/LocalRing/Quotient.lean,Mathlib/RingTheory/TensorProduct/Maps.lean,MathlibTest/instance_diamonds.lean 20 7 ['eric-wieser', 'github-actions', 'mathlib-dependent-issues', 'mathlib-merge-conflicts', 'matthewjasper'] eric-wieser
assignee:eric-wieser
1-30021
1 day ago
6-65480
6 days ago
13-10726
13 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 67/58 Mathlib/SetTheory/Ordinal/CantorNormalForm.lean 1 15 ['SnirBroshi', 'github-actions', 'vihdzp'] nobody
1-29918
1 day ago
2-8371
2 days ago
10-71349
10 days
36584 vihdzp
author:vihdzp
 feat: lemmas on ordinal `Nat.cast` Downstreamed from the CGT repo. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-set-theory 30/11 Mathlib/SetTheory/Cardinal/Ordinal.lean,Mathlib/SetTheory/Ordinal/Arithmetic.lean,Mathlib/SetTheory/Ordinal/Basic.lean 3 5 ['SnirBroshi', 'b-mehta', 'github-actions', 'mathlib-merge-conflicts', 'vihdzp'] b-mehta
assignee:b-mehta
1-28443
1 day ago
1-28506
1 day ago
3-81583
3 days
34729 vihdzp
author:vihdzp
 chore: `no_expose` various `Ordinal` definitions These all have convoluted definitions that are better characterized by their API, or (in the case of `Ordinal.ToType`) are defined through choice and have no useful definitional equalities. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-set-theory 14/9 Mathlib/SetTheory/Ordinal/Basic.lean,Mathlib/SetTheory/Ordinal/Exponential.lean 2 9 ['b-mehta', 'github-actions', 'leanprover-radar', 'vihdzp'] b-mehta
assignee:b-mehta
1-28256
1 day ago
1-28256
1 day ago
42-20759
42 days
34554 SnirBroshi
author:SnirBroshi
 feat(Data/Nat/Factorization/Divisors): calculate divisors using prime factorization --- There are over 200 files that import both `divisors` and `factorization`, but none of them seemed to fit, so I created a new file for this. (`Data.Nat.Factorization.PrimePow` and `NumberTheory.ArithmeticFunction.Misc` are the best I found) [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-data maintainer-merge 91/0 Mathlib.lean,Mathlib/Data/Nat/Factorization/Divisors.lean 2 24 ['SnirBroshi', 'YaelDillies', 'b-mehta', 'eric-wieser', 'github-actions', 'jcommelin', 'joneugster', 'mathlib-bors', 'plp127'] joneugster
assignee:joneugster
1-27708
1 day ago
19-75351
19 days ago
20-36417
20 days
35779 vihdzp
author:vihdzp
 feat: more lemmas about `Order.cof` We generalize various results from `Ordinal.cof` to `Order.cof`, and use them to give nicer proofs of existing results. I'll probably split this up as I go. --- - [x] depends on: #35513 - [x] depends on: #35792 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-set-theory 76/16 Mathlib/Order/Cofinal.lean,Mathlib/SetTheory/Cardinal/Basic.lean,Mathlib/SetTheory/Cardinal/Cofinality.lean,Mathlib/SetTheory/Cardinal/Regular.lean 4 3 ['github-actions', 'mathlib-dependent-issues', 'mathlib-merge-conflicts'] nobody
1-24168
1 day ago
unknown
0-0
0 seconds
36702 vihdzp
author:vihdzp
 feat: cofinality is idempotent We prove this result for `Order.cof` and deduce the `Ordinal.cof` version from it. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-set-theory t-order 15/6 Mathlib/SetTheory/Cardinal/Cofinality.lean 1 1 ['github-actions'] nobody
1-23209
1 day ago
1-23293
1 day ago
1-23248
1 day
29251 yoh-tanimoto
author:yoh-tanimoto
 feat(Analysis/InnerProductSpace/): define standard subspaces of a complex Hilbert space define standard subspaces of a complex Hilbert space: a standard subspace `S` of `H` is a closed real subspace `S` such that `S ⊓ i S = ⊥` and `S ⊔ i S = ⊤`. prove that the symplectic complement of `S` is again a standard subspace and the double symplectic complement is itself. motivation: one can define a closable operator `x + i y ↦ x - i y` and develop an analogue of the Tomita-Takesaki modular theory for von Neumann algebras. By considering inclusions of standard subspaces, one can obtain unitary representations of various Lie groups. https://ems.press/content/serial-article-files/48171 `#min_imports` does not give a correct set of imports. - [x] depends on: #29230 for `Lattice` `CompleteLattice` - [x] depends on: #29241 for the definition of `orthogonal` - [x] depends on: #29243 for `sup_orthogonal` - [x] depends on: #29235 for `mapEquiv` t-analysis 243/0 Mathlib.lean,Mathlib/Analysis/InnerProductSpace/StandardSubspace.lean,Mathlib/Topology/Algebra/Module/Equiv.lean 3 36 ['github-actions', 'j-loreaux', 'mathlib-dependent-issues', 'mathlib-merge-conflicts', 'mathlib4-merge-conflict-bot', 'yoh-tanimoto'] j-loreaux
assignee:j-loreaux
1-19871
1 day ago
1-19932
1 day ago
6-17340
6 days
34826 wwylele
author:wwylele
 feat(Geometry/Euclidean): volume of a simplex WIP. sorry-free but still need cleaning up and breaking into smaller PRs --- - [ ] depends on: #34697 - [ ] depends on: #34858 - [ ] depends on: #34859 - [ ] depends on: #35039 - [ ] depends on: #35358 - [ ] depends on: #35365 - [ ] depends on: #35837 - [ ] depends on: #36018 - [ ] depends on: #36462 - [ ] depends on: #36466 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-euclidean-geometry blocked-by-other-PR 1212/6 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 3 ['github-actions', 'mathlib-dependent-issues', 'mathlib-merge-conflicts'] nobody
1-18726
1 day ago
unknown
0-0
0 seconds
34937 tannerduve
author:tannerduve
 feat(Computability): semilattice instance on Turing degrees This PR equips `TuringDegree` with a `SemilatticeSup` structure by introducing the Turing join, proving usual least-upper-bound properties, and lifting these to degrees (quotients). In support of this, it extends the existing `RecursiveIn` API with some lemmas used in the degree theory. The main contribution is the `SemilatticeSup` instance on `TuringDegree`. We define the Turing join as follows ``` turingJoin (f g) : ℕ → ℕ -- notation: f ⊕ g ``` and prove it is a least upper bound: * `left_le_join`, `right_le_join` * `join_le` * monotonicity and congruence lemmas (`join_mono`, `join_congr`) We lift this to degrees in `TuringDegree.sup`, `TuringDegree.le_sup_left`, `TuringDegree.le_sup_right`, and `TuringDegree.sup_le` ``` instance : SemilatticeSup TuringDegree ``` **New additions to `RecursiveIn.lean`:** - `liftPrim`, `liftPrimrec`, `RecursiveIn'`, `ComputableIn`, `ComputableIn₂`: Encodes partial/total functions between `Primcodable` types as `ℕ →. ℕ`, analogous to `Partrec`/`Computable`. - `of_eq`, `of_eq_tot`, `of_primrec`, `some`, `none`, `mono`, `subst`: Standard closure properties for `RecursiveIn`. - `cond_const`, `cond_core_rfind`, `cond`, `ComputableIn.cond`: Shows `RecursiveIn` is closed under conditionals when the guard is absolutely computable - `Nat.Partrec.recursiveIn`, `Computable.computableIn`: Every partrec/computable function is recursive in any oracle set. Small addition to `Partrec` we add to `Mathlib.Computability.Partrec` a small helper def (`Partrec.kronecker` and related `rfind` lemmas) representing the function that returns 1 if its two (unpaired) arguments are equal, and 0 otherwise, which is used in the proof of `cond` ## TODO Some current `RecursiveIn` proofs such as `cond_core_rfind` still work directly with the inductive constructors and are thus very long. A follow up could add a combinator-style closure library by essentially relativizing all the results and lemmas in `Partrec`, and proofs could be golfed heavily as they are in `Partrec` ## Note: AI Usage [Aleph prover](https://logicalintelligence.com/aleph-coding-ai/) was allowed to prove an earlier version of `cond_core_rfind`, which included stating and proving the lemma `cond_const` but the proofs have since been iterated on manually Cursor was allowed to run git commands and edit docstrings/headers, and was used in setting up the module structure of the files t-computability new-contributor large-import 644/63 Mathlib/Computability/Partrec.lean,Mathlib/Computability/RecursiveIn.lean,Mathlib/Computability/TuringDegree.lean 3 14 ['eric-wieser', 'github-actions', 'plp127', 'tannerduve', 'vihdzp'] Komyyy
assignee:Komyyy
1-18620
1 day ago
27-37859
27 days ago
37-7474
37 days
35979 xgenereux
author:xgenereux
 chore(RatFunc/AsPolynomial): use Valuation.IsTrivialOn and simplify proofs Use the recently added typeclass `Valuation.IsTrivialOn` instead of the explicit hypothesis. I have taken the opportunity to simplify some proofs with grind. 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-algebra
label:t-algebra$
 22/27 Mathlib/Algebra/Polynomial/AlgebraMap.lean,Mathlib/Algebra/Polynomial/Basic.lean,Mathlib/FieldTheory/RatFunc/AsPolynomial.lean,Mathlib/FieldTheory/RatFunc/Basic.lean,Mathlib/RingTheory/Valuation/Basic.lean 5 9 ['github-actions', 'mathlib-merge-conflicts', 'vihdzp', 'xgenereux'] dagurtomas
assignee:dagurtomas
1-18614
1 day ago
8-47904
8 days ago
14-24210
14 days
36285 grunweg
author:grunweg
 feat: torsion of an affine connection We define the torsion tensor of an affine connection, i.e. a covariant derivative on the tangent bundle `TM` of some manifold `M`. From the path towards the 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 --- - [x] depends on: #36279 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-differential-geometry 171/5 Mathlib.lean,Mathlib/Geometry/Manifold/VectorBundle/CovariantDerivative/Torsion.lean,Mathlib/Geometry/Manifold/VectorField/LieBracket.lean 3 3 ['github-actions', 'mathlib-dependent-issues', 'mathlib-merge-conflicts'] ocfnash
assignee:ocfnash
1-18613
1 day ago
10-46400
10 days ago
0-224
3 minutes
36362 bryangingechen
author:bryangingechen
 ci: only generate auto-merge token if the label is present Similar to #35958, we don't need to generate this token if the steps that use it don't need to run. This was causing a build failure for the dependabot PR: #36358 I also cleanup a TODO from #29726. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) CI 12/21 .github/workflows/build_template.yml 1 2 ['github-actions', 'mathlib-merge-conflicts'] joneugster
assignee:joneugster
1-18612
1 day ago
5-83701
5 days ago
8-54544
8 days
36421 ROTARTSI82
author:ROTARTSI82
 feat(RingTheory/IsAdjoinRoot): add mkOfAdjoinEqTop' Alternative hypothesis to existing theorem: prove the result from a `Module.Free `hypothesis instead of `IsIntegrallyClosed`. If `α` generates `S` as an algebra, then `S` is given by adjoining a root of `minpoly R α`. --- Hello, we are the Algebraic Geometry group from the UW Math AI lab, and this is our first PR! This definition of `mkOfAdjoinEqTop'` generalizes the existing `mkOfAdjoinEqTop` and shows the result from `Module.Free` instead of `IsIntegrallyClosed`. It is used in future results that we would like to upstream at https://github.com/uw-math-ai/monogenic-extensions, which is a project to formalize lemmas 3.1 and 3.2 from https://arxiv.org/abs/2503.07846. Co-authored-by: George Peykanu Co-authored-by: Bryan Boehnke Co-authored-by: Bianca Viray <67076332+b-viray@users.noreply.github.com> --> [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor large-import 57/0 Mathlib/FieldTheory/Minpoly/Basic.lean,Mathlib/RingTheory/IsAdjoinRoot.lean 2 3 ['ROTARTSI82', 'github-actions'] dupuisf
assignee:dupuisf
1-18611
1 day ago
7-20090
7 days ago
7-20045
7 days
36446 Vierkantor
author:Vierkantor
 feat(Tactic/Linter): weekly lint for Verso syntax in docstrings This PR defines the linter option `linter.style.docStringVerso`, which tries to parse docstrings as Verso documents (while skipping the elaboration part), and reports any parse errors that may occur. This should help the eventual transition to Verso-based docstrings by already collecting examples of docstrings will need to be updated. Verso is not perfectly backward-compatible with Markdown, and so it doesn't make sense to enable this for all CI runs. Instead, I added the linter to the weekly report (that also contains the suggestions for replacing `tac; grind` with `grind`). Since this linter only checks syntax, not semantics, of Verso it won't detect issues that we also need to fix before enabling Verso in Mathlib, like: * `#`-headings being wrongly nested * code snippets referring to non-existent declarations * broken code blocks * code snippets not defining which language / parser to use etc. I argue it is better to incrementally tackle the syntax, since this would also directly improve the quality of our current Markdown rendering. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-linter documentation 68/1 Mathlib/Init.lean,Mathlib/Tactic/Linter/DocString.lean 2 1 ['github-actions'] joneugster
assignee:joneugster
1-18610
1 day ago
6-48849
6 days ago
6-48804
6 days
36447 sharky564
author:sharky564
 feat(Analysis/Topology): Generalize Riesz' theorem to locally compact… … T2 topological vector spaces --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-analysis new-contributor large-import 130/67 Mathlib/Analysis/Normed/Module/FiniteDimension.lean,Mathlib/Topology/Algebra/Module/FiniteDimension.lean 2 5 ['CoolRmal', 'github-actions', 'sharky564'] j-loreaux
assignee:j-loreaux
1-18609
1 day ago
6-47357
6 days ago
6-47341
6 days
36457 joelriou
author:joelriou
 feat(Algebra/Category/ModuleCat/Presheaf): the pushforward by a functor is monoidal If `F : C ⥤ D` is a functor and `R : Dᵒᵖ ⥤ CommRingCat` is a presheaf of commutative rings, then the pushforward functor from the category of presheaves of modules on `R` to the category of presheaves of modules on `F.op ⋙ R` is monoidal. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-category-theory t-algebra maintainer-merge
label:t-algebra$
 50/0 Mathlib.lean,Mathlib/Algebra/Category/ModuleCat/Presheaf/Pushforward.lean,Mathlib/Algebra/Category/ModuleCat/Presheaf/PushforwardZeroMonoidal.lean 3 5 ['chrisflav', 'github-actions', 'joelriou'] dagurtomas
assignee:dagurtomas
1-18608
1 day ago
4-79682
4 days ago
5-78001
5 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) t-data new-contributor 68/1 Mathlib/Data/Nat/Bits.lean 1 3 ['github-actions', 'linesthatinterlace'] joneugster
assignee:joneugster
1-18606
1 day ago
6-20367
6 days ago
6-20422
6 days
36467 SnirBroshi
author:SnirBroshi
 feat(Data/Sym/Sym2): `fromRel` & `ToRel` order isomorphism This obsoletes the existing `fromRel` order embedding, but adds an order embedding for `ToRel` since it can avoid `Subtype` which makes it more useful (e.g. it shows `ToRel` is injective). --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-data 35/10 Mathlib/Data/Sym/Sym2.lean 1 1 ['github-actions'] joneugster
assignee:joneugster
1-18606
1 day ago
6-6880
6 days ago
6-6835
6 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
label:t-algebra$
 45/14 Mathlib/Algebra/GCDMonoid/Basic.lean,Mathlib/Data/Finset/NatDivisors.lean,Mathlib/NumberTheory/ArithmeticFunction/Misc.lean 3 2 ['AlexKontorovich', 'github-actions'] alreadydone
assignee:alreadydone
1-18605
1 day ago
5-38048
5 days ago
5-38003
5 days
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. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-ring-theory 223/0 Mathlib.lean,Mathlib/FieldTheory/Normal/Defs.lean,Mathlib/RingTheory/Ideal/Galois.lean,Mathlib/RingTheory/Invariant/Basic.lean 4 1 ['github-actions'] erdOne
assignee:erdOne
1-18604
1 day ago
4-44708
4 days ago
4-44663
4 days
36162 SnirBroshi
author:SnirBroshi
 chore(Data/Finsupp/Defs): make `Finsupp.onFinset` computable Delete the `noncomputable section` to let every `def` choose whether it's computable, and replace the use of `Classical.decEq` in `onFinset_support` and `onFinset` with a `[DecidableEq M]` assumption. --- [Zulip](https://leanprover.zulipchat.com/#narrow/channel/113489-new-members/topic/Finsupp.20noncomputability/with/576412101) [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-data 43/33 Mathlib/Algebra/BigOperators/Finsupp/Basic.lean,Mathlib/Algebra/Polynomial/Derivative.lean,Mathlib/Data/Finsupp/Basic.lean,Mathlib/Data/Finsupp/Defs.lean,Mathlib/Data/Finsupp/ToDFinsupp.lean,Mathlib/Data/Sym/Sym2/Finsupp.lean,Mathlib/FieldTheory/PurelyInseparable/Tower.lean,Mathlib/LinearAlgebra/Finsupp/LinearCombination.lean 8 2 ['SnirBroshi', 'github-actions'] joneugster
assignee:joneugster
1-18236
1 day ago
12-21062
12 days ago
12-22760
12 days
36513 Thmoas-Guan
author:Thmoas-Guan
 feat(RingTheory/Smooth): composition of formally smooth ring hom Add the lemma that composition of formally smooth ring hom is formally smooth. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-ring-theory 8/4 Mathlib/RingTheory/RingHom/Smooth.lean 1 1 ['github-actions'] nobody
1-15077
1 day ago
2-76167
2 days ago
2-76149
2 days
36705 SnirBroshi
author:SnirBroshi
 feat(Combinatorics/SimpleGraph/Walks/Operations): permutations of support and cleaning up append/concat --- The cleaning-up follows the feedback from https://github.com/leanprover-community/mathlib4/pull/35630#issuecomment-4035207900 and https://github.com/leanprover-community/mathlib4/pull/35631#discussion_r2936736735 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-combinatorics 38/21 Mathlib/Combinatorics/SimpleGraph/Connectivity/Connected.lean,Mathlib/Combinatorics/SimpleGraph/Connectivity/WalkDecomp.lean,Mathlib/Combinatorics/SimpleGraph/Hamiltonian.lean,Mathlib/Combinatorics/SimpleGraph/Paths.lean,Mathlib/Combinatorics/SimpleGraph/Walks/Basic.lean,Mathlib/Combinatorics/SimpleGraph/Walks/Operations.lean,Mathlib/Combinatorics/SimpleGraph/Walks/Subwalks.lean 7 1 ['github-actions'] nobody
1-13728
1 day ago
1-13803
1 day ago
1-13758
1 day
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 238/208 Mathlib/Analysis/Distribution/SchwartzSpace/Basic.lean,Mathlib/Analysis/Distribution/SchwartzSpace/Deriv.lean,Mathlib/Analysis/Distribution/SchwartzSpace/Fourier.lean 3 8 ['github-actions', 'j-loreaux', 'mcdoll'] j-loreaux
assignee:j-loreaux
1-12507
1 day ago
1-12412
1 day ago
8-78227
8 days
36665 NoahW314
author:NoahW314
 feat: add indiscrete topology lemmas --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-topology new-contributor 34/0 Mathlib/Topology/Algebra/Group/Basic.lean,Mathlib/Topology/Algebra/Monoid.lean,Mathlib/Topology/Order.lean 3 6 ['NoahW314', 'eric-wieser', 'github-actions'] nobody
1-11067
1 day ago
2-5085
2 days ago
2-5040
2 days
36629 SnirBroshi
author:SnirBroshi
 chore(Algebra/Order/Monoid/Unbundled/Basic): replace `mul_left_cancel''` with an `IsLeftCancelMul` instance --- [`mul_left_cancel`](https://leanprover-community.github.io/mathlib4_docs/Mathlib/Algebra/Group/Defs.html#mul_left_cancel) [`mul_left_cancel''`](https://leanprover-community.github.io/mathlib4_docs/Mathlib/Algebra/Order/Monoid/Unbundled/Basic.html#mul_left_cancel'') [`mul_right_cancel`](https://leanprover-community.github.io/mathlib4_docs/Mathlib/Algebra/Group/Defs.html#mul_right_cancel) [`mul_right_cancel''`](https://leanprover-community.github.io/mathlib4_docs/Mathlib/Algebra/Order/Monoid/Unbundled/Basic.html#mul_right_cancel'') [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra
label:t-algebra$
 16/13 Mathlib/Algebra/Order/Monoid/Unbundled/Basic.lean 1 1 ['github-actions'] nobody
1-10319
1 day ago
2-82238
2 days ago
2-82193
2 days
34599 cameronfreer
author:cameronfreer
 feat(Logic/Equiv/Fintype): generalize toCompl and exists_extending_pair to finite source Generalize the Equiv subtype-extension API so it only needs finiteness of the source subtype, then use that to drastically simplify `Equiv.Perm.isMultiplyPretransitive`. ### Changes to `Logic/Equiv/Fintype.lean` * **`Equiv.toCompl`**: generalize from `[Finite α]` to `[Finite {x | p x}]`. New proof (due to tb65536) uses finset symmetric differences to avoid needing finiteness of the ambient type. * **`Equiv.extendSubtype`** and related lemmas: adapt to `[Finite {x | p x}]`. * **`Equiv.Perm.exists_extending_pair`**: strengthen from `[Finite β]` to `[Finite α]`. Given two injective functions `f, g : α → β` where `α` is finite, there exists `σ : Perm β` with `σ ∘ f = g`. The target `β` can now be infinite. ### Changes to `MultipleTransitivity.lean` * **`Equiv.Perm.isMultiplyPretransitive`**: replace ~70-line manual bijectivity construction with a two-line proof via `exists_smul_eq_embedding`. * **`exists_smul_eq_embedding`**: rewire to use `exists_extending_pair` directly (removing the old cardinal-arithmetic proof `exists_extending_pair_of_finite_source`). ### Application Used in formalizing de Finetti's theorem (exchangeability ⇒ contractability): https://github.com/cameronfreer/exchangeability/blob/03a854a2/Exchangeability/Contractability.lean#L459 Co-authored-by: tb65536 t-group-theory new-contributor 51/79 Mathlib/GroupTheory/GroupAction/MultipleTransitivity.lean,Mathlib/Logic/Equiv/Fintype.lean 2 26 ['LLaurance', 'cameronfreer', 'github-actions', 'mathlib-merge-conflicts', 'tb65536'] mattrobball
assignee:mattrobball
1-9973
1 day ago
9-37164
9 days ago
30-58093
30 days
36598 CoolRmal
author:CoolRmal
 feat: f is lowersemicontinuous iff -f is uppersemicontinuous Proved that a function `f` is lowersemicontinuous iff `-f` is uppersemicontinuous. Also changed the hypothesis of `upperSemicontinuousOn_iff_preimage_Iio` from LinearOrder to Preorder. Used in the proof of conditional Jensen's inequality for concave functions. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-topology 73/3 Mathlib/Algebra/Notation/Pi/Defs.lean,Mathlib/Topology/Semicontinuity/Basic.lean 2 9 ['CoolRmal', 'github-actions', 'j-loreaux', 'themathqueen'] nobody
1-8890
1 day ago
2-67900
2 days ago
3-11714
3 days
36672 Komyyy
author:Komyyy
 refactor(Data/Fintype/Order): `g (⨆ i, f i) = ⨆ i, g (f i)` holds when the codomain isn't linear This was found while reviewing #35822. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-order easy 1/1 Mathlib/Data/Fintype/Order.lean 1 1 ['github-actions'] nobody
1-7723
1 day ago
1-82523
1 day ago
1-82478
1 day
36681 SnirBroshi
author:SnirBroshi
 feat(SetTheory/Ordinal/Principal): 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.
[![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) 		t-set-theory 90/0 Mathlib.lean,Mathlib/SetTheory/Ordinal/ArithmeticAnalysis.lean,Mathlib/SetTheory/Ordinal/Principal.lean 3 4 ['SnirBroshi', 'github-actions', 'vihdzp'] nobody
1-7607
1 day ago
1-59109
1 day ago
1-59064
1 day
36664 SnirBroshi
author:SnirBroshi
 feat(SetTheory/Ordinal/Arithmetic): characterize when ordinal addition commutes --- The proof is from ["Cardinal and Ordinal Numbers"](https://en.wikipedia.org/wiki/Cardinal_and_Ordinal_Numbers). A similar fact for multiplication is mentioned on [Wikipedia](https://en.wikipedia.org/wiki/Ordinal_arithmetic). [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-set-theory 19/0 Mathlib/SetTheory/Ordinal/Arithmetic.lean 1 20 ['SnirBroshi', 'github-actions', 'mathlib-merge-conflicts', 'plp127', 'vihdzp'] vihdzp
assignee:vihdzp
1-7442
1 day ago
1-12167
1 day ago
1-67237
1 day
27953 CoolRmal
author:CoolRmal
 feat(ProbabilityTheory): Conditional Jensen's Inequality This PR adds several variants of the conditional Jensen's inequality. I made some changes to Mathlib/Analysis/Convex/Approximation.lean because I need the sequence of affine functions to be bouneded above at each point in the proof of `conditional_jensen_hereditarilyLindelofSpace`. --- - [x] depends on: #31411 - [x] depends on: #31399 - [x] depends on: #31180 - [ ] depends on: #36598 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor t-measure-probability blocked-by-other-PR 307/22 Mathlib.lean,Mathlib/Algebra/Notation/Pi/Defs.lean,Mathlib/Analysis/Convex/Approximation.lean,Mathlib/MeasureTheory/Function/ConditionalExpectation/CondJensen.lean,Mathlib/MeasureTheory/MeasurableSpace/Constructions.lean,Mathlib/MeasureTheory/Measure/Restrict.lean,Mathlib/MeasureTheory/Measure/Typeclasses/SFinite.lean,Mathlib/Topology/Semicontinuity/Basic.lean 8 41 ['CoolRmal', 'EtienneC30', 'RemyDegenne', 'github-actions', 'mathlib-dependent-issues', 'mathlib4-merge-conflict-bot'] sgouezel
assignee:sgouezel
1-7297
1 day ago
4-55703
4 days ago
36-44934
36 days
36386 SnkXyx
author:SnkXyx
 feat(Algebra/MvPolynomial/Degrees): add some lemmas about `degreeOf` These lemmas are used in #36103 --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra new-contributor
label:t-algebra$
 84/0 Mathlib/Algebra/MvPolynomial/Degrees.lean 1 3 ['Hagb', 'github-actions'] dagurtomas
assignee:dagurtomas
1-2349
1 day ago
8-12621
8 days ago
8-12576
8 days
36703 vihdzp
author:vihdzp
 feat: `cof α = cof β` given a strictly monotonic function `f : α → β` with cofinal range We use this to prove `cof (f a) = cof a` for a normal function `f`, without having to go through the bespoke fundamental sequence API. --- - [ ] depends on: #36715 [![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 89/40 Mathlib/Order/Cofinal.lean,Mathlib/Order/IsNormal.lean,Mathlib/SetTheory/Cardinal/Cofinality.lean 3 2 ['github-actions', 'mathlib-dependent-issues'] nobody
1-1300
1 day ago
1-4496
1 day ago
1-14483
1 day
36712 thorimur
author:thorimur
 feat: `runSkimmer.sh` for applying interactive suggestions This PR introduces a script `scripts/runSkimmer.sh` which runs `lake build Mathlib:applyCurrentTryThis` via a minimal "side package" that depends on (only) both skimmer and Mathlib. The command `scripts/runSkimmer.sh` will apply all interactive suggestions (try this suggestions, hints) in Mathlib. Because it uses a local dependency, it can use the oleans obtained from a top-level `lake exe cache get` or `lake build` without needing to modify mathlib's lakefile and rebuild mathlib. The facet safely builds any missing oleans itself. This is still very experimental (and says so!), and hopefully can afford to be so by living entirely in `scripts/`. This script is configurable to be copy-pasted into other repos, after changing the config variables to point to the appropriate new targets. `runSkimmer.sh --init` then sets up the side package. (This PR already commits the result of `runSkimmer.sh --init`, and it does not need to be run again for Mathlib.) Technical note on updating the side package: Currently, running the script also runs `lake update` in the side package (only) (but does not fetch the cache). This may update the `lake-manifest.json` and `lean-toolchain` in the side package (here, in `scripts/SideSkimmer`). To prevent this from mixing with intentional refactors performed by skimmer, the `.gitignore` in that side package ignores the `lake-manifest.json` and the `lean-toolchain`. The alternative would be to use `./scripts/runSkimmer.sh --lake-update` in the workflows to simply keep the side package up to date instead of ignoring the side manifest and toolchain, but `lake update` in the side package is not very costly. Technical question on cache management: `lake update` attempts to get the mathlib cache (whether or not any substantive update actually happened) unless `MATHLIB_NO_CACHE_ON_UPDATE=1`. Currently this script sets `MATHLIB_NO_CACHE_ON_UPDATE=1` for mathlib and just advises getting the cache beforehand. But notice the following: even though mathlib is `require`d from a local path, mathlib *dependencies* are duplicated into `scripts/SideSkimmer/.lake/packages` and rebuilt there. This isn't such a big deal for mathlib's dependencies, but it might be a big deal for projects *depending* on mathlib. So, we only set `MATHLIB_NO_CACHE_ON_UPDATE=1` if we're targeting mathlib. But is there a better way? The usage is as follows: ``` Usage: runSkimmer.sh [[--no-update] [--on [tgts...]] | --lake-update | --init | -h | --help] Options: [no arguments] Run `lake update` in `SideSkimmer`, then run `lake build :applyCurrentTryThis` on targets configured in `runSkimmer.sh`. (When refactoring mathlib, does not get mathlib's cache.) --on [tgts...] Run `lake update` in `SideSkimmer`, then run `lake build :applyCurrentTryThis` for `tgt` in the supplied `tgts`. Each `tgt` may be lake target syntax for the current package or a library or module. (When refactoring mathlib, does not get mathlib's cache.) --no-update Only run `lake build :applyCurrentTryThis`, without first running `lake update` in `SideSkimmer`. Applies both the default targets and those supplied with `--on`. --init Set up the `SideSkimmer` side package. This only needs to be done when first introducing `runSkimmer.sh` to a new repo. --lake-update Only run `lake update -v` in `SideSkimmer`, and if refactoring mathlib, do not get mathlib's cache while doing so. ``` Disclosure: Proofreading services and reminders of bash syntax/conventions were provided by Claude Opus 4.6, but I'm fully to blame for the design and keystrokes. :) --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) CI 173/0 scripts/README.md,scripts/SideSkimmer/.gitignore,scripts/SideSkimmer/lakefile.lean,scripts/runSkimmer.sh 4 1 ['github-actions'] nobody
0-84689
23 hours ago
0-84459
23 hours ago
1-4570
1 day
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. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) 171/0 Mathlib/CategoryTheory/Abelian/Injective/Dimension.lean,Mathlib/CategoryTheory/Abelian/Projective/Dimension.lean,Mathlib/Data/ENat/Basic.lean 3 1 ['github-actions'] nobody
0-83388
23 hours ago
2-55473
2 days ago
2-55428
2 days
35716 IvanRenison
author:IvanRenison
 feat(Combinatorics/SimpleGraph/Connectivity): add lemmas about reachable, degree and neighbor set --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-combinatorics awaiting-author 28/6 Mathlib/Combinatorics/SimpleGraph/Connectivity/Connected.lean 1 11 ['IvanRenison', 'SnirBroshi', 'YaelDillies', 'github-actions', 'vlad902'] YaelDillies
assignee:YaelDillies
0-82411
22 hours ago
20-58657
20 days ago
20-58612
20 days
35628 SnirBroshi
author:SnirBroshi
 feat(Combinatorics/SimpleGraph/Maps): characterize `neighborSet` and `edgeSet` across an embedding --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-combinatorics awaiting-author 40/0 Mathlib/Combinatorics/SimpleGraph/Maps.lean 1 4 ['YaelDillies', 'github-actions'] YaelDillies
assignee:YaelDillies
0-82118
22 hours ago
23-7378
23 days ago
23-7333
23 days
35325 SnirBroshi
author:SnirBroshi
 feat(SimpleGraph/Acyclic): `ENat.card V ≤ 2 → G.IsAcyclic` --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-combinatorics awaiting-author 26/3 Mathlib/Combinatorics/SimpleGraph/Acyclic.lean,Mathlib/Data/Finite/Card.lean 2 4 ['Rida-Hamadani', 'YaelDillies', 'github-actions'] YaelDillies
assignee:YaelDillies
0-81955
22 hours ago
24-16665
24 days ago
29-80568
29 days
36550 joelriou
author:joelriou
 feat(Algebra/Homology/SpectralObject): starting the construction of the spectral sequence If `X` is a spectral object indexed by the preordered type `ι` in the abelian category `C` and we have a recipe `data : SpectralSequenceDataCore ι c r₀`, we define the pages of the spectral sequences attached to `X` and `data`, and we compute the kernel of the differentials. In the next PR #36555 in the series, the spectral sequence shall be constructed in full. --- - [ ] depends on: #36182 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) WIP t-category-theory t-algebra blocked-by-other-PR awaiting-author
label:t-algebra$
 497/0 Mathlib.lean,Mathlib/Algebra/Homology/SpectralObject/Homology.lean,Mathlib/Algebra/Homology/SpectralObject/SpectralSequence.lean 3 16 ['github-actions', 'joelriou', 'mathlib-dependent-issues', 'robin-carlier', 'smorel394'] nobody
0-81900
22 hours ago
4-39568
4 days ago
0-1
1 second
29458 LiamSchilling
author:LiamSchilling
 feat(MvPolynomial/WeightedHomogenous): relate `weightedTotalDegree` to `degrees` and `degreeOf` `weightedTotalDegree` is the most general notion of multivariate degree in mathlib. These theorems show that it specializes to `degrees` and `degreeOf` with specialized weights. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) awaiting-author t-ring-theory new-contributor 17/0 Mathlib/RingTheory/MvPolynomial/Homogeneous.lean 1 8 ['LiamSchilling', 'chrisflav', 'github-actions', 'vlad902'] chrisflav
assignee:chrisflav
0-79825
22 hours ago
174-71760
174 days ago
8-27365
8 days
36555 joelriou
author:joelriou
 feat(Algebra/Homology/SpectralObject): the spectral sequence This PR constructs the spectral sequence attached to a spectral object in an abelian category. --- - [ ] depends on: #36182 - [ ] depends on: #36550 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-category-theory t-algebra blocked-by-other-PR
label:t-algebra$
 873/0 Mathlib.lean,Mathlib/Algebra/Homology/SpectralObject/Homology.lean,Mathlib/Algebra/Homology/SpectralObject/SpectralSequence.lean 3 15 ['github-actions', 'mathlib-dependent-issues', 'smorel394'] nobody
0-79432
22 hours ago
4-36322
4 days ago
0-828
13 minutes
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 869/0 Mathlib.lean,Mathlib/Analysis/Calculus/ImplicitContDiff.lean,Mathlib/Analysis/ODE/SmoothFlow.lean,Mathlib/Topology/MetricSpace/Pseudo/Lemmas.lean 4 7 ['github-actions', 'idontgetoutmuch', 'j-loreaux', 'mathlib-dependent-issues'] j-loreaux
assignee:j-loreaux
0-78430
21 hours ago
13-85909
13 days ago
21-15389
21 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
0-77755
21 hours ago
23-71281
23 days ago
27-65714
27 days
36316 JovanGerb
author:JovanGerb
 chore: import `Type*` in `Mathlib.Init` The implementation of `Type*` is very short, so I've put its minimal dependencies in the same file, `Mathlib.Tactic.TypeStar`, and imported this in `Mathlib.Init`. This allows us to get rid of many explicit imports of this file, and lets it be available everywhere in mathlib. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) large-import maintainer-merge merge-conflict 58/87 Mathlib/Algebra/Notation.lean,Mathlib/Algebra/Notation/Defs.lean,Mathlib/Algebra/Notation/Lemmas.lean,Mathlib/Control/Functor.lean,Mathlib/Data/Bool/AllAny.lean,Mathlib/Data/Bracket.lean,Mathlib/Data/Int/Cast/Pi.lean,Mathlib/Data/Int/Init.lean,Mathlib/Data/List/Lookmap.lean,Mathlib/Data/List/ModifyLast.lean,Mathlib/Data/List/TFAE.lean,Mathlib/Data/Nat/Init.lean,Mathlib/Data/Num/Basic.lean,Mathlib/Data/Option/Defs.lean,Mathlib/Data/Option/NAry.lean,Mathlib/Data/Ordering/Basic.lean,Mathlib/Data/Prod/PProd.lean,Mathlib/Data/Rat/Init.lean,Mathlib/Data/Tree/Basic.lean,Mathlib/Data/Vector3.lean,Mathlib/Init.lean,Mathlib/Lean/Elab/Term.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/Nonempty.lean,Mathlib/Logic/Nontrivial/Defs.lean,Mathlib/Order/Bounds/Defs.lean,Mathlib/Order/Defs/LinearOrder.lean,Mathlib/Order/Defs/PartialOrder.lean,Mathlib/Order/Notation.lean,Mathlib/Tactic/Basic.lean,Mathlib/Tactic/CategoryTheory/CategoryStar.lean,Mathlib/Tactic/FunProp/Mor.lean,Mathlib/Tactic/GCongr/Core.lean,Mathlib/Tactic/Inhabit.lean,Mathlib/Tactic/Linter/DirectoryDependency.lean,Mathlib/Tactic/MkIffOfInductiveProp.lean,Mathlib/Tactic/TypeStar.lean,MathlibTest/BasicFiles/Init.lean,MathlibTest/BasicFiles/TacticBasic.lean,MathlibTest/ImplicitUniverses.lean 44 5 ['SnirBroshi', 'github-actions', 'j-loreaux', 'mathlib-merge-conflicts'] j-loreaux
assignee:j-loreaux
0-77749
21 hours ago
9-54855
9 days ago
9-58178
9 days
36530 kim-em
author:kim-em
 experiment: how many `inferInstanceAs` can be replaced with `inferInstanceAs%` (#35950 version) large-import merge-conflict 480/12 Mathlib.lean,Mathlib/Algebra/Order/Ring/StandardPart.lean,Mathlib/Init.lean,Mathlib/Tactic.lean,Mathlib/Tactic/InferInstanceAsPercent.lean,MathlibTest/InferInstanceAsPercent.lean 6 3 ['github-actions', 'mathlib-merge-conflicts'] nobody
0-77747
21 hours ago
4-63001
4 days ago
0-65
1 minute
36353 smmercuri
author:smmercuri
 feat(NumberField/InfinitePlace/Ramification): add cardinality results for (un)ramified places over The number of unramified/ramified places over a fixed infinite place `v` is equal/twice the number of unmixed/mixed complex embeddings over `v.embedding` --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-number-theory maintainer-merge 137/34 Mathlib/Data/Set/Card.lean,Mathlib/Logic/Basic.lean,Mathlib/NumberTheory/NumberField/InfinitePlace/Embeddings.lean,Mathlib/NumberTheory/NumberField/InfinitePlace/Ramification.lean 4 14 ['MichaelStollBayreuth', 'github-actions', 'smmercuri', 'tb65536'] MichaelStollBayreuth
assignee:MichaelStollBayreuth
0-76341
21 hours ago
1-61757
1 day ago
6-72808
6 days
36697 jano-wol
author:jano-wol
 feat: semisimple eigenspace API and JC decomposition through ad Semisimple eigenspace API and JC decomposition through ad --- PR introduces the proof of the following results: - Eigenspace/Semisimple.lean: `IsFinitelySemisimple.iSup_eigenspace_eq_top`, `IsFinitelySemisimple.eq_zero_of_forall_eigenvalue_eq_zero`. - Eigenspace/Minpoly.lean: `aeval_apply_of_mem_eigenspace` generalizing `aeval_apply_of_hasEigenvector` (drops `x ≠ 0`), `eval_zero_of_aeval_apply_eq_zero`. - AdjointAction/JordanChevalley.lean (new): `ad_semisimplePart_mem_adjoin`, `ad_nilpotentPart_mem_adjoin`, `eval_zero_of_aeval_ad_eq`. These results are building blocks for a formalization of Cartan's criterion for semisimplicity. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra large-import
label:t-algebra$
 124/4 Mathlib.lean,Mathlib/Algebra/Lie/AdjointAction/JordanChevalley.lean,Mathlib/LinearAlgebra/Eigenspace/Minpoly.lean,Mathlib/LinearAlgebra/Eigenspace/Semisimple.lean 4 3 ['github-actions', 'mathlib-bors'] ocfnash
assignee:ocfnash
0-74497
20 hours ago
1-21847
1 day ago
1-22380
1 day
36713 SnirBroshi
author:SnirBroshi
 chore(Algebra/Group/End): golf `MulAut.conj` --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra easy delegated
label:t-algebra$
 7/10 Mathlib/Algebra/Group/End.lean 1 3 ['github-actions', 'grunweg', 'mathlib-bors', 'vihdzp'] grunweg
assignee:grunweg
0-73961
20 hours ago
1-6291
1 day ago
1-6246
1 day
36439 xgenereux
author:xgenereux
 feat(Algebra/Adjoin): CoeT instances for Algebra.adjoin on singletons Is it 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/) 9/3 Mathlib/Algebra/Algebra/Subalgebra/Lattice.lean,Mathlib/RingTheory/Adjoin/Polynomial/Basic.lean 2 1 ['github-actions'] nobody
0-72726
20 hours ago
6-61328
6 days ago
6-61283
6 days
34487 martinwintermath
author:martinwintermath
 feat(LinearAlgebra/SesquilinearForm/Basic): 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
label:t-algebra$
 87/16 Mathlib/Geometry/Convex/Cone/Dual.lean,Mathlib/LinearAlgebra/Dual/Lemmas.lean,Mathlib/LinearAlgebra/PerfectPairing/Basic.lean,Mathlib/LinearAlgebra/SesquilinearForm/Basic.lean 4 3 ['github-actions', 'martinwintermath', 'mathlib4-merge-conflict-bot'] nobody
0-72289
20 hours ago
1-28021
1 day ago
1-27976
1 day
35398 vlad902
author:vlad902
 feat(SimpleGraph): `bypass` lemmas --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-combinatorics 17/0 Mathlib/Combinatorics/SimpleGraph/Paths.lean 1 1 ['github-actions'] kmill
assignee:kmill
0-71511
19 hours ago
28-65486
28 days ago
28-65441
28 days
36723 oliver-butterley
author:oliver-butterley
 Fix (`ClearExcept`): update to skip `isAuxDecl` This PR updates the defintion of `ClearExcept` to skip any `isAuxDecl` and adds a test to confirm this behaviour. **Motivation** When writing a recursive proof in tactic mode, Lean places the recursive hypothesis in the local context as an *auxiliary declaration* (`LocalDecl.isAuxDecl`). This declaration is: - Completely invisible in the Infoview (even with all display options enabled) - Required for the recursive call to elaborate Previously the `clear * -` tactic (`Mathlib.Tactic.ClearExcept`) iterates over **all** declarations in the local context and clears everything not in the explicit keep set or a type-class instance. As such it silently clears the recursive hypothesis. While the hypothesis can technically be added to the keep set by name, it is not shown in the Infoview, making it easy to overlook. In simple examples this is never an issue, the inconvenience was found when working with software verification where the context gets huge and needs clearing for performance and where the recursive goals are closed by automation and so it is easy to overlook the need to explicitly add the name of the theorem to the exclude list. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-meta 15/3 Mathlib/Tactic/ClearExcept.lean,MathlibTest/ClearExcept.lean 2 2 ['github-actions', 'oliver-butterley'] nobody
0-70982
19 hours ago
unknown
0-0
0 seconds
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
label:t-algebra$
 34/0 Mathlib/Algebra/Module/BigOperators.lean,Mathlib/Analysis/Seminorm.lean 2 1 ['github-actions'] nobody
0-70707
19 hours ago
0-70707
19 hours ago
0-71870
19 hours
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
0-70620
19 hours ago
unknown
0-0
0 seconds
35418 vlad902
author:vlad902
 feat(SimpleGraph): `IsAcyclic` iff not 2-edge-reachable --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-combinatorics 45/5 Mathlib/Combinatorics/SimpleGraph/Acyclic.lean,Mathlib/Combinatorics/SimpleGraph/Connectivity/EdgeConnectivity.lean,Mathlib/Combinatorics/SimpleGraph/Paths.lean 3 5 ['SnirBroshi', 'github-actions', 'mathlib-merge-conflicts', 'vlad902'] nobody
0-70266
19 hours ago
9-76314
9 days ago
27-686
27 days
36720 YanYablonovskiy
author:YanYablonovskiy
 feat(Order): `OrderType.lift` and more order type API Adding the universe lifting operation to `OrderType` , addresses a 'TODO' . --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-order new-contributor maintainer-merge 36/2 Mathlib/Order/Types/Defs.lean 1 17 ['YaelDillies', 'YanYablonovskiy', 'github-actions'] nobody
0-68957
19 hours ago
0-69021
19 hours ago
0-70150
19 hours
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 127/0 Mathlib/Analysis/Asymptotics/Lemmas.lean,Mathlib/Analysis/Distribution/TemperedDistribution.lean 2 2 ['github-actions', 'mathlib-dependent-issues'] nobody
0-68834
19 hours ago
3-66547
3 days ago
0-1
1 second
36721 yoh-tanimoto
author:yoh-tanimoto
 refactor(LinearAlgebra/LinearPMap): generalize (partially) to semilinear maps replace `LinearPMap.toFun : domain →ₗ[R] F` by `domain →ₛₗ[σ] F`, in order to allow semilinear maps, in particular conjugate-linear maps. TODO: to define graph of a semilinear map, one has to consider twisted modules #35877 see discussion https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/.60SemilinearPMap.60/with/576451756 177/159 Mathlib/Algebra/Module/Injective.lean,Mathlib/Analysis/Convex/Cone/Extension.lean,Mathlib/Analysis/LocallyConvex/Separation.lean,Mathlib/LinearAlgebra/LinearPMap.lean,Mathlib/Topology/Algebra/Module/LinearPMap.lean 5 4 ['github-actions', 'mcdoll'] nobody
0-67888
18 hours ago
0-67973
18 hours ago
0-71766
19 hours
35674 astrainfinita
author:astrainfinita
 refactor: use `OrderSupInfSet` in `ConditionallyCompleteLattice` --- - [ ] depends on: #35774 [diff](https://github.com/astrainfinita/mathlib4/compare/use_islub_c..astrainfinita:mathlib4:ordersup_cssup) [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-order merge-conflict 446/316 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/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/SetTheory/Cardinal/Order.lean,Mathlib/SetTheory/Ordinal/Basic.lean 20 5 ['github-actions', 'mathlib-dependent-issues', 'mathlib-merge-conflicts'] nobody
0-67186
18 hours ago
unknown
0-0
0 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
0-67160
18 hours ago
unknown
0-0
0 seconds
35762 xroblot
author:xroblot
 feat(CyclotomicFields/Galois): compute the image of the stabilizer of an unramified prime ideal in `(ℤ/nℤ)ˣ` For a cyclotomic field `K = ℚ(ζₙ)` and a prime `p` not dividing `n`, we show that for any prime ideal `P` of `𝓞 K` above `p`, the image of the decomposition group of `P` under the isomorphism `Gal(K/ℚ) ≃* (ℤ/nℤ)ˣ` equals the cyclic subgroup generated by the Frobenius element `[p] ∈ (ℤ/nℤ)ˣ`. --- - [x] depends on: #35530 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) large-import t-algebra
label:t-algebra$
 110/0 Mathlib/FieldTheory/Finite/Extension.lean,Mathlib/NumberTheory/NumberField/Basic.lean,Mathlib/NumberTheory/NumberField/Cyclotomic/Galois.lean,Mathlib/NumberTheory/NumberField/Ideal/Basic.lean,Mathlib/RingTheory/Ideal/Int.lean,Mathlib/RingTheory/Invariant/Basic.lean 6 9 ['github-actions', 'joneugster', 'mathlib-dependent-issues', 'mathlib-merge-conflicts', 'tb65536', 'xroblot'] dagurtomas
assignee:dagurtomas
0-63297
17 hours ago
6-63916
6 days ago
6-71828
6 days
36704 adam84-hub
author:adam84-hub
 chore(Function): add surjective_def Adds an explicit discoverable definitional lemma for `Function.Surjective`. - addresses #31745 - scope is intentionally tiny: one theorem in `Mathlib/Logic/Function/Defs.lean` AI was used for drafting; I reviewed the final code and understand it well enough to vouch for it. t-logic new-contributor awaiting-author 4/0 Mathlib/Logic/Function/Defs.lean 1 8 ['SnirBroshi', 'adam84-hub', 'github-actions', 'plp127', 'vihdzp'] nobody
0-60778
16 hours ago
1-13550
1 day ago
0-2124
35 minutes
28682 Thmoas-Guan
author:Thmoas-Guan
 feat(RingTheory): definition of regular local ring In this PR, we give the definition of regular local ring. The class `IsRegularLocalRing` is defined as `(maximalIdeal R).spanFinrank = ringKrullDim R` We also established the lemma `IsRegularLocalRing.iff_finrank_cotangentSpace` proving this definition is equivalent to the cotangent space version. --- - [ ] depends on: #35337 [![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 281/33 Mathlib.lean,Mathlib/Algebra/Module/SpanRank.lean,Mathlib/Algebra/Module/Torsion/Basic.lean,Mathlib/LinearAlgebra/Span/Basic.lean,Mathlib/RingTheory/Ideal/Cotangent.lean,Mathlib/RingTheory/Ideal/KrullsHeightTheorem.lean,Mathlib/RingTheory/KrullDimension/Regular.lean,Mathlib/RingTheory/LocalRing/RingHom/Basic.lean,Mathlib/RingTheory/RegularLocalRing/Defs.lean,Mathlib/SetTheory/Cardinal/ToNat.lean 10 52 ['Thmoas-Guan', 'chrisflav', 'github-actions', 'mathlib-dependent-issues', 'mathlib4-merge-conflict-bot', 'mbkybky'] chrisflav
assignee:chrisflav
0-59071
16 hours ago
28-73206
28 days ago
21-2017
21 days
36391 xroblot
author:xroblot
 feat(FieldTheory/Galois/IsGaloisGroup): Galois groups for quotients by normal subgroups Assume `G `is a finite Galois group for `L/K`, `N ⊴ G` is normal, and `F = Fix(N)`. This PR proves: - `G ⧸ N` acts on `F` via `(g.N) • x := g • x` as a `MulSemiringAction`. Under `SMulCommClass G K L`, it is also `SMulCommClass (G ⧸ N) K F` - instance `quotient` : `IsGaloisGroup (G ⧸ N) K F` — the quotient group is a Galois group for the intermediate extension `F/K`. - theorem `quotientMap` under the hypothesis ` E ≤ F`: `IsGaloisGroup (H.map (QuotientGroup.mk' N)) E F` — if `H` is the Galois group for `L/E`, the image of `H` under the quotient map is a Galois group for `F/E`. --- - [x] depends on: #36365 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra maintainer-merge
label:t-algebra$
 83/1 Mathlib/FieldTheory/Galois/IsGaloisGroup.lean 1 19 ['github-actions', 'mathlib-dependent-issues', 'mathlib-merge-conflicts', 'robin-carlier', 'xroblot'] nobody
0-58225
16 hours ago
1-72407
1 day ago
1-85012
1 day
36696 yuma-mizuno
author:yuma-mizuno
 chore: add deprecation message for old `coherence` To help avoid confusion. See [#mathlib4 > Difference between `monoidal` and `coherence` tactics](https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/Difference.20between.20.60monoidal.60.20and.20.60coherence.60.20tactics/with/579572051) --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-meta 33/17 Mathlib/Tactic/CategoryTheory/BicategoryCoherence.lean,Mathlib/Tactic/CategoryTheory/Coherence.lean,MathlibTest/CategoryTheory/Coherence.lean 3 3 ['gaetanserre', 'github-actions', 'yuma-mizuno'] nobody
0-57997
16 hours ago
1-29220
1 day ago
1-30130
1 day
35776 IvanRenison
author:IvanRenison
 feat(Combinatorics): define `HasAdj` for capturing the common structure of different kinds of (simple) graphs We add a vertex set considering that we want to refactor `SimpleGraph` to also use one --- This pr replaces #4127 Zulip discussion: https://leanprover.zulipchat.com/#narrow/channel/252551-graph-theory/topic/HasAdj/with/575843445 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-combinatorics 101/0 Mathlib.lean,Mathlib/Combinatorics/Digraph/HasAdj.lean,Mathlib/Combinatorics/HasAdj/Basic.lean,Mathlib/Combinatorics/SimpleGraph/HasAdj.lean 4 6 ['YaelDillies', 'github-actions'] YaelDillies
assignee:YaelDillies
0-57691
16 hours ago
17-28984
17 days ago
17-28939
17 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 `⊃`/`>`. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-data large-import t-meta 387/306 Mathlib/Algebra/Algebra/Subalgebra/Lattice.lean,Mathlib/Algebra/Group/Pointwise/Finset/Basic.lean,Mathlib/Algebra/Group/Pointwise/Set/Basic.lean,Mathlib/Algebra/Module/Torsion/Basic.lean,Mathlib/Algebra/MonoidAlgebra/Support.lean,Mathlib/Algebra/MvPolynomial/Monad.lean,Mathlib/Analysis/Convex/KreinMilman.lean,Mathlib/Analysis/LocallyConvex/WeakSpace.lean,Mathlib/Analysis/Normed/Group/FunctionSeries.lean,Mathlib/Analysis/Polynomial/MahlerMeasure.lean,Mathlib/Analysis/SpecialFunctions/Log/Summable.lean,Mathlib/CategoryTheory/CofilteredSystem.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/Rank/Cardinal.lean,Mathlib/Combinatorics/SetFamily/AhlswedeZhang.lean,Mathlib/Combinatorics/SetFamily/KruskalKatona.lean,Mathlib/Combinatorics/SimpleGraph/Basic.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/FiniteExhaustion.lean,Mathlib/Data/Set/Notation.lean,Mathlib/Data/Set/Semiring.lean,Mathlib/Data/Set/Sups.lean,Mathlib/Data/SetLike/Basic.lean,Mathlib/Data/SetNotation.lean,Mathlib/Dynamics/Ergodic/Ergodic.lean,Mathlib/Dynamics/FixedPoints/Prufer.lean,Mathlib/FieldTheory/Perfect.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/CountableDenseLinearOrder.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/Order/SetNotation.lean,Mathlib/Order/SupIndep.lean,Mathlib/Probability/Process/HittingTime.lean,Mathlib/RingTheory/AlgebraicIndependent/TranscendenceBasis.lean,Mathlib/RingTheory/Spectrum/Prime/Module.lean,Mathlib/RingTheory/WittVector/StructurePolynomial.lean,Mathlib/SetTheory/ZFC/Basic.lean,Mathlib/SetTheory/ZFC/Class.lean,Mathlib/SetTheory/ZFC/Ordinal.lean,Mathlib/SetTheory/ZFC/PSet.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/Instances/CantorSet.lean,Mathlib/Topology/MetricSpace/HausdorffDistance.lean,Mathlib/Topology/MetricSpace/Ultra/Basic.lean,Mathlib/Topology/Order/HullKernel.lean,Mathlib/Topology/Semicontinuity/Hemicontinuity.lean,Mathlib/Topology/Separation/Profinite.lean,Mathlib/Topology/Sets/OpenCover.lean,Mathlib/Topology/Sets/Opens.lean 101 2 ['github-actions', 'mathlib4-merge-conflict-bot'] nobody
0-57050
15 hours ago
0-54639
15 hours ago
0-17993
4 hours
35084 edegeltje
author:edegeltje
 feat(Combinatorics/SimpleGraph): Cayley graph for structures with `Mul`/`Add` This pr: - adds the definition `SimpleGraph.mulCayley`, where `x` is adjacent to a distinct `y` when there is `g` such that `x * g = y` or `x = y * g`, - proves various lemmas about the above, - adds/proves the additive versions of all of the above some related zulip conversation: https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/Cayley.20and.20circulant.20graph/with/572839048 --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-combinatorics awaiting-author 106/0 Mathlib.lean,Mathlib/Combinatorics/SimpleGraph/Cayley.lean 2 29 ['SnirBroshi', 'YaelDillies', 'edegeltje', 'github-actions', 'vihdzp', 'vlad902'] YaelDillies
assignee:YaelDillies
0-56978
15 hours ago
31-33783
31 days ago
34-57538
34 days
28684 Thmoas-Guan
author:Thmoas-Guan
 feat(RingTheory): definition of regular ring In this PR, we define regular ring as every localization is regular local ring, and proved polynomial over regular ring is regular. --- - [ ] depends on: #28682 [![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 339/33 Mathlib.lean,Mathlib/Algebra/Module/SpanRank.lean,Mathlib/Algebra/Module/Torsion/Basic.lean,Mathlib/LinearAlgebra/Span/Basic.lean,Mathlib/RingTheory/Ideal/Cotangent.lean,Mathlib/RingTheory/Ideal/KrullsHeightTheorem.lean,Mathlib/RingTheory/KrullDimension/Regular.lean,Mathlib/RingTheory/LocalRing/RingHom/Basic.lean,Mathlib/RingTheory/RegularLocalRing/Defs.lean,Mathlib/RingTheory/RegularLocalRing/RegularRing/Basic.lean,Mathlib/SetTheory/Cardinal/ToNat.lean 11 5 ['Thmoas-Guan', 'github-actions', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
0-56105
15 hours ago
208-77669
208 days ago
0-153
2 minutes
36195 Vierkantor
author:Vierkantor
 chore(*): add backticks around identifiers in docstrings This PR fixes docstrings that refer to identifiers (like add_comm) with underscores or non-balanced [square brackets], by putting `backticks` around those identifiers (or $\LaTeX$ dollar signs, as appropriate). These were spotted by a WIP linter, and are intended to ease the transition to Verso docstrings (where these issues will become errors). Another PR will fix references to identifiers that have been renamed (those that had underscores in Lean 3). --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) documentation tech debt 159/132 Mathlib/Algebra/Group/NatPowAssoc.lean,Mathlib/Algebra/Lie/UniversalEnveloping.lean,Mathlib/Algebra/MvPolynomial/Degrees.lean,Mathlib/Algebra/Polynomial/RuleOfSigns.lean,Mathlib/AlgebraicGeometry/Geometrically/Integral.lean,Mathlib/AlgebraicTopology/DoldKan/Degeneracies.lean,Mathlib/Analysis/CStarAlgebra/Spectrum.lean,Mathlib/Analysis/Fourier/AddCircle.lean,Mathlib/Analysis/Real/Cardinality.lean,Mathlib/Analysis/Real/OfDigits.lean,Mathlib/Analysis/SpecialFunctions/Arcosh.lean,Mathlib/Analysis/SpecialFunctions/Complex/Arg.lean,Mathlib/Analysis/SpecialFunctions/Trigonometric/Chebyshev/RootsExtrema.lean,Mathlib/CategoryTheory/EqToHom.lean,Mathlib/CategoryTheory/Functor/Flat.lean,Mathlib/CategoryTheory/Limits/Shapes/Equalizers.lean,Mathlib/CategoryTheory/Limits/Shapes/Multiequalizer.lean,Mathlib/Computability/TuringMachine/ToPartrec.lean,Mathlib/Data/Int/Cast/Field.lean,Mathlib/Data/List/Defs.lean,Mathlib/Data/List/Rotate.lean,Mathlib/Data/PNat/Xgcd.lean,Mathlib/Data/ZMod/Factorial.lean,Mathlib/FieldTheory/Minpoly/Field.lean,Mathlib/GroupTheory/Schreier.lean,Mathlib/InformationTheory/KullbackLeibler/KLFun.lean,Mathlib/LinearAlgebra/Alternating/Uncurry/Fin.lean,Mathlib/LinearAlgebra/CliffordAlgebra/BaseChange.lean,Mathlib/LinearAlgebra/Dual/Basis.lean,Mathlib/LinearAlgebra/ExteriorPower/Basis.lean,Mathlib/LinearAlgebra/LinearDisjoint.lean,Mathlib/MeasureTheory/Group/Measure.lean,Mathlib/MeasureTheory/Integral/IntegralEqImproper.lean,Mathlib/MeasureTheory/Integral/IntervalIntegral/Periodic.lean,Mathlib/MeasureTheory/Measure/LevyProkhorovMetric.lean,Mathlib/MeasureTheory/Measure/Restrict.lean,Mathlib/MeasureTheory/VectorMeasure/Decomposition/Hahn.lean,Mathlib/ModelTheory/Basic.lean,Mathlib/NumberTheory/LucasPrimality.lean,Mathlib/NumberTheory/Modular.lean,Mathlib/NumberTheory/Padics/Hensel.lean,Mathlib/NumberTheory/Padics/PadicVal/Basic.lean,Mathlib/Order/LiminfLimsup.lean,Mathlib/Probability/Distributions/Gaussian/HasGaussianLaw/Independence.lean,Mathlib/Probability/Independence/Basic.lean,Mathlib/Probability/Independence/Conditional.lean,Mathlib/Probability/Independence/Kernel/Indep.lean,Mathlib/Probability/Martingale/Upcrossing.lean,Mathlib/RingTheory/DedekindDomain/Factorization.lean,Mathlib/RingTheory/DividedPowers/Padic.lean,Mathlib/RingTheory/Ideal/Maps.lean,Mathlib/RingTheory/IntegralDomain.lean,Mathlib/RingTheory/LinearDisjoint.lean,Mathlib/RingTheory/Localization/AtPrime/Basic.lean,Mathlib/RingTheory/MvPolynomial/WeightedHomogeneous.lean,Mathlib/RingTheory/Regular/RegularSequence.lean,Mathlib/Tactic/Algebraize.lean,Mathlib/Tactic/ArithMult.lean,Mathlib/Tactic/ArithMult/Init.lean,Mathlib/Tactic/FieldSimp/Attr.lean,Mathlib/Tactic/FieldSimp/Lemmas.lean,Mathlib/Tactic/FunProp/Types.lean,Mathlib/Tactic/LinearCombination'.lean,Mathlib/Tactic/LinearCombination.lean,Mathlib/Tactic/LinearCombination/Lemmas.lean,Mathlib/Tactic/Linter/TextBased.lean,Mathlib/Tactic/NormNum/Basic.lean,Mathlib/Tactic/NormNum/Inv.lean,Mathlib/Tactic/SetLike.lean,Mathlib/Tactic/SplitIfs.lean,Mathlib/Tactic/SwapVar.lean,Mathlib/Tactic/Translate/Core.lean,Mathlib/Tactic/Widget/SelectPanelUtils.lean,Mathlib/Topology/Order/LowerUpperTopology.lean,Mathlib/Topology/Order/UpperLowerSetTopology.lean,Mathlib/Util/AtomM.lean 76 14 ['Vierkantor', 'github-actions', 'grunweg', 'mathlib-merge-conflicts'] nobody
0-55386
15 hours ago
0-55419
15 hours ago
4-18522
4 days
36260 Vierkantor
author:Vierkantor
 chore(Tactic/GCongr): rewrite `gcongr`, `rel` tactic docstrings This PR (re)writes the docstrings for the `gcongr` and `rel` tactics to consistently match the official style guide, to make sure it is complete while not getting too long. The docstrings had a lot of examples and were information dense, which is very good! With the rewrite, the information should be easier to find given the consistent structure. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) documentation t-meta 51/43 Mathlib/Tactic/GCongr/Core.lean 1 14 ['JovanGerb', 'Vierkantor', 'github-actions'] nobody
0-55278
15 hours ago
0-54678
15 hours ago
1-10436
1 day
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_prime_coeff_eq_one`: for prime `p`, all coefficients of `cyclotomic p R` equal `1`. - `eq_nsmul_cyclotomic_of_nonneg_coeff`: a nonneg-coefficient polynomial vanishing at a primitive root is a positive scalar multiple of the cyclotomic polynomial. - `card_fiber_eq_card_div`: if a function `d : A → ZMod p` satisfies `∑ ζ^(d a) = 0`, then every fiber has cardinality `|A| / p`. These results are useful for combinatorial applications involving exponential sums and equidistribution over cyclic groups. Theorems imported from: https://github.com/Latinum-Agentic-Commerce/AlgebraicDesignTheory t-ring-theory new-contributor awaiting-author 101/1 Mathlib/RingTheory/Polynomial/Cyclotomic/Basic.lean,Mathlib/RingTheory/Polynomial/Cyclotomic/Roots.lean 2 5 ['github-actions', 'grunweg', 'ocfnash'] ocfnash
assignee:ocfnash
0-55267
15 hours ago
22-5918
22 days ago
22-5923
22 days
36671 Komyyy
author:Komyyy
 doc(Order/ConditionallyCompleteLattice/Defs): Lean3 structure notation * Some docstrings still use Lean3 structure notation. * Some mistakenly use `(sup|inf)` instead of `s(Sup|Inf)` * `conditionallyCompleteLatticeOfs(Sup|Inf)` provides both `sup` & `inf` These were found while reviewing #35774. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) documentation t-order delegated 18/18 Mathlib/Order/ConditionallyCompleteLattice/Defs.lean 1 5 ['Komyyy', 'Vierkantor', 'github-actions', 'mathlib-bors'] Vierkantor
assignee:Vierkantor
0-55208
15 hours ago
0-70806
19 hours ago
1-12340
1 day
35652 dennj
author:dennj
 feat(LinearAlgebra/Matrix): add `Matrix.mul_eq_smul_one_symm` ## Summary - Add `Matrix.mul_eq_smul_one_symm`: if `M * N = c • 1` and `det M ≠ 0`, then `N * M = c • 1` - A scalar generalisation of `mul_eq_one_symm` (the `c = 1` case) to arbitrary scalars, requiring `IsDomain` and `det M ≠ 0` - The proof uses the adjugate identity `adjugate M * M = det M • 1` to derive `det M • (N * M) = det M • (c • 1)`, then cancels `det M` via `mul_left_cancel₀` Theorem imported from: https://github.com/Latinum-Agentic-Commerce/AlgebraicDesignTheory t-algebra new-contributor awaiting-author LLM-generated
label:t-algebra$
 28/0 Mathlib/LinearAlgebra/Matrix/NonsingularInverse.lean 1 4 ['dagurtomas', 'eric-wieser', 'github-actions', 'grunweg'] dagurtomas
assignee:dagurtomas
0-55193
15 hours ago
22-41286
22 days ago
22-41241
22 days
36695 wwylele
author:wwylele
 feat(Analysis/InnerProductSpace): Gram matrix equals to X†*X --- I was surprised I couldn't find this, as this is a property of Gram matrix in the first paragraph of its Wikipedia page. Perhaps I missed something and this is stated at greater generality else where? [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-analysis large-import 8/0 Mathlib/Analysis/InnerProductSpace/GramMatrix.lean 1 1 ['github-actions'] nobody
0-55121
15 hours ago
1-31265
1 day ago
1-31220
1 day
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. t-algebra new-contributor awaiting-author
label:t-algebra$
 231/0 Mathlib.lean,Mathlib/LinearAlgebra/Matrix/Stochastic.lean,Mathlib/Probability/Markov/Stationary.lean 3 12 ['dennj', 'dupuisf', 'github-actions', 'grunweg', 'j-loreaux', 'mathlib-merge-conflicts', 'riccardobrasca'] nobody
0-55118
15 hours ago
18-10422
18 days ago
10-33013
10 days
36274 JTylM
author:JTylM
 feat(Combinatorics/SimpleGraph/Matching): implemented the matchingNumber of a graph --- 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 341/2 Mathlib/Combinatorics/SimpleGraph/Matching.lean 1 7 ['JTylM', 'SnirBroshi', 'SproutSeeds', 'github-actions'] nobody
0-55094
15 hours ago
0-55158
15 hours ago
6-34608
6 days
34709 dennj
author:dennj
 feat(Analysis/ODE): add discrete Grönwall inequality ## Summary Add discrete Grönwall inequality to `Mathlib/Analysis/ODE/DiscreteGronwall.lean` Provides bounds for recurrence inequalities of the form `u(n+1) ≤ c(n) * u(n) + b(n)` ### Main results - `discrete_gronwall_prod_general`: Product form working over any linearly ordered commutative ring - `prod_one_add_Ico_mono`: Auxiliary lemma for product comparisons over subintervals - `discrete_gronwall`: Classical exponential bound `u(n) ≤ (u(n₀) + ∑ b(k)) * exp(∑ c(i))` (ℝ-specific) - `discrete_gronwall_Ico`: Uniform bound over a finite interval (ℝ-specific) ## Related work Complements the continuous Grönwall inequality in `Mathlib.Analysis.ODE.Gronwall` ## References * Grönwall, T. H. (1919). "Note on the derivatives with respect to a parameter of the solutions of a system of differential equations". *Annals of Mathematics*, 20(4), 292–296. t-analysis new-contributor LLM-generated 174/0 Mathlib.lean,Mathlib/Analysis/ODE/DiscreteGronwall.lean 2 2 ['github-actions', 'grunweg'] j-loreaux
assignee:j-loreaux
0-55088
15 hours ago
43-8201
43 days ago
43-8156
43 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$
 61/3 Mathlib.lean,Mathlib/Algebra/GCDMonoid/Basic.lean,Mathlib/Algebra/GCDMonoid/DistribLattice.lean 3 2 ['github-actions'] nobody
0-54921
15 hours ago
0-53711
14 hours ago
0-2836
47 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
0-54862
15 hours ago
unknown
0-0
0 seconds
36321 SproutSeeds
author:SproutSeeds
 feat(Tactic): add to_subgroupOf translator for Subgroup declarations Closes #35419 Adds a minimal `@[to_subgroupOf]` translator for declarations involving `Subgroup` binders. The translator inserts an ambient subgroup binder and rewrites subgroup-valued binders through `subgroupOf`. Scope is limited to the new tactic modules and dogfood tests for the generated `subgroupOf` declarations. Tools used: Codex 5.3 extra high --- Happy to adjust naming, placement, or proof style based on maintainer preference. t-meta new-contributor LLM-generated 301/0 Mathlib.lean,Mathlib/Tactic.lean,Mathlib/Tactic/ToSubgroupOf.lean,MathlibTest/ToSubgroupOf.lean 4 4 ['JovanGerb', 'SproutSeeds', 'github-actions'] nobody
0-54857
15 hours ago
unknown
0-0
0 seconds
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 42/0 Mathlib/Geometry/Euclidean/Inversion/Basic.lean 1 2 ['github-actions'] nobody
0-54853
15 hours ago
unknown
0-0
0 seconds
36170 SproutSeeds
author:SproutSeeds
 feat(ContMDiff): add ContMDiff scalar-action typeclasses Closes #5617 Following the API pattern of `ContinuousConstSMul` and `ContinuousSMul`, this PR adds a smoothness parameter `n` to `ContMDiffConstSMul` and `ContMDiffSMul`, factors the generic `ContMDiff` scalar-action API into a dedicated file, and keeps `NormedSpace` focused on the standard scalar/vector instance. It also adds the corresponding `const_smul` and `smul` lemmas (`WithinAt`, `At`, `On`, and global versions). Tools used: Codex 5.3 extra high --- t-differential-geometry new-contributor awaiting-author LLM-generated 160/24 Mathlib.lean,Mathlib/Analysis/Complex/UpperHalfPlane/Manifold.lean,Mathlib/Geometry/Manifold/Algebra/SmoothFunctions.lean,Mathlib/Geometry/Manifold/ContMDiff/MulAction.lean,Mathlib/Geometry/Manifold/ContMDiff/NormedSpace.lean,Mathlib/Geometry/Manifold/MFDeriv/NormedSpace.lean 6 19 ['SproutSeeds', 'github-actions', 'grunweg', 'mathlib-bors', 'mathlib-merge-conflicts', 'sgouezel'] PatrickMassot
assignee:PatrickMassot
0-54848
15 hours ago
6-335
6 days ago
4-45581
4 days
34906 seewoo5
author:seewoo5
 feat(NumberTheory/Bernoulli): von Staudt-Clausen theorem --- Rado's proof ("A New Proof of a Theorem of v. Staudt", JLMS 1935) of [von Staudt-Clausen theorem](https://en.wikipedia.org/wiki/Von_Staudt%E2%80%93Clausen_theorem). Initially written by AxiomProver (see commit 97a308e) with further golfs with Claude and Codex. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-number-theory large-import awaiting-author LLM-generated 489/4 Mathlib/NumberTheory/Bernoulli.lean,docs/references.bib 2 26 ['MichaelStollBayreuth', 'github-actions', 'kckennylau', 'seewoo5'] MichaelStollBayreuth
assignee:MichaelStollBayreuth
0-54615
15 hours ago
7-37746
7 days ago
23-3163
23 days
34934 zorkary
author:zorkary
 feat(Data/List): add constructive split classifiers ## Summary This PR adds a small constructive list-classification utility module: - `Mathlib/Data/List/SplitClassify.lean` (new file) - `Mathlib.lean` (one new public import) The goal is to provide reusable case-data classifiers for common split equalities, so downstream proofs can branch on explicit structure instead of repeatedly rebuilding list-shape arguments. ## Added API - `List.append_cons_eq_singleton` - `List.ConsSplit` - `List.classify_cons_vs_split` - `List.SwapSplit` - `List.classify_swap_vs_split` ## Scope and non-goals - No existing theorem statements were changed. - No existing proof logic was modified. - This is a narrow additive change (new module + one import). ## Build I verified: - `lake build Mathlib.Data.List.SplitClassify` ## Duplicate/overlap check Before opening this PR, I checked local mathlib sources and GitHub search for likely overlap, including targeted searches for: - `classify_cons_vs_split` - `classify_swap_vs_split` - `append_cons_eq_singleton` - open PRs/issues around list split/classification helpers I did not find direct existing equivalents or open PRs with the same API. ## AI usage disclosure I used AI assistance (Codex/LLM) for drafting and implementation support. I understand the high-level intent and have validated the module builds. I am opening this as a draft specifically to get maintainer review on technical details before marking it ready. t-data new-contributor LLM-generated 213/0 Mathlib.lean,Mathlib/Data/List/SplitClassify.lean 2 1 ['github-actions'] nobody
0-54608
15 hours ago
unknown
0-0
0 seconds
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, so I left it as a `TODO` in this PR, too) - 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 3 ['github-actions', 'mathlib-merge-conflicts'] bryangingechen
assignee:bryangingechen
0-54587
15 hours ago
11-8642
11 days ago
25-71564
25 days
34773 semaraugusto
author:semaraugusto
 feat(InformationTheory): add Shannon entropy for probability mass functions Add Shannon entropy for probability mass functions This PR defines the Shannon entropy of a probability mass function as an ℝ-valued infinite sum using `Real.negMulLog`, and proves basic properties and standard computations. Main results include: * entropy is nonnegative; * entropy vanishes iff the PMF is deterministic (`PMF.pure`); * entropy is strictly positive for non-pure PMFs; * entropy of a Bernoulli PMF coincides with `Real.binEntropy`; * entropy of uniform distributions is `log` of the cardinality, both for `PMF.uniformOfFintype` and `PMF.uniformOfFinset`. Several small helper lemmas isolate technical arguments about supports, coercions from `ℝ≥0∞`, and bounds on infinite sums, in order to keep the main proofs readable. See the [Zulip discussion](https://leanprover.zulipchat.com/#narrow/channel/113489-new-members/topic/generic.20shannon.20entropy.20formalization.20mathlib4/with/570643335). --- I used ChatGPT for some proof structuring and refactoring suggestions, but all proofs were manually checked and adapted. I verified the arguments and adjusted naming and structure to follow mathlib conventions. The proof of shannonEntropy_eq_log_card_sub_toReal_klDiv_uniformOfFintype and some of its helper lemmas were initially generated using Codex. I manually reviewed the generated proof, checked each step, and refactored the code and naming to follow mathlib conventions. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor awaiting-author LLM-generated 417/0 Mathlib.lean,Mathlib/Analysis/SpecialFunctions/Log/NegMulLog.lean,Mathlib/InformationTheory/Entropy.lean 3 13 ['adomasbaliuka', 'dupuisf', 'github-actions', 'mathlib-merge-conflicts', 'mattrobball', 'semaraugusto', 'wwylele'] dupuisf and sgouezel
assignee:sgouezel assignee:dupuisf
0-54563
15 hours ago
32-38380
32 days ago
9-18104
9 days
35113 bryangingechen
author:bryangingechen
 ci: refactor commit_verification so it works on PRs from forks Currently the commit verification workflow fails when run on a PR from a fork because it tries to post a comment, but its GITHUB_TOKEN is read-only. [Example failure](https://github.com/leanprover-community/mathlib4/actions/runs/21796757425/job/62885536927?pr=34973) This PR refactors the commit verification workflow using the new [leanprover-community/privilege-escalation-bridge](https://github.com/leanprover-community/privilege-escalation-bridge), splitting it into two workflows where the second one (triggered by `workflow_run` has access to a GITHUB_TOKEN that can post comments). We also make the workflow run the commit verification scripts from `master` rather than the PR branch to close a small security issue where someone could spoof verification / get the workflow to post arbitrary comments by modifying the scripts in their branch. Prepared with codex. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) CI delegated LLM-generated 81/22 .github/workflows/commit_verification.yml,.github/workflows/commit_verification_wf_run.yml 2 35 ['adomani', 'bryangingechen', 'github-actions', 'joneugster', 'marcelolynch', 'mathlib-bors', 'mathlib-merge-conflicts'] joneugster
assignee:joneugster
0-54516
15 hours ago
26-48551
26 days ago
7-46277
7 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 14 ['copilot-pull-request-reviewer', 'github-actions', 'homeowmorphism', 'mathlib-bors', 'plp127', 'tb65536'] tb65536
assignee:tb65536
0-54511
15 hours ago
15-61642
15 days ago
15-62247
15 days
36732 kim-em
author:kim-em
 ci: robustly extract PR numbers in emoji merge delegate workflow The previous `awk -F# '{ gsub(/)$/, ""); print $NF}'` pipeline was fragile: for commits without a `(#PR)` suffix it passed the entire commit line (hash + message) to the Python script, which crashed when treating that string as a regex pattern. There should rarely be a commit without a `(#PR)` suffix, as usually commits come via bors, but there's no point leaving this loaded gun lying around. Replace with `grep -oP '(?<=\(#)\d+(?=\))'` which only emits the digit string from commits that contain the exact `(#NUMBER)` pattern, and silently skips any commit without a PR number. 🤖 Prepared with Claude Code CI delegated LLM-generated 1/1 .github/workflows/zulip_emoji_merge_delegate.yaml 1 3 ['bryangingechen', 'github-actions', 'mathlib-bors'] nobody
0-54403
15 hours ago
0-62120
17 hours ago
0-62075
17 hours
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 156/0 Mathlib/Tactic/DefEqAbuse.lean,MathlibTest/DefEqAbuse.lean 2 1 ['github-actions'] nobody
0-54364
15 hours ago
0-85767
23 hours ago
1-2658
1 day
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 414/84 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 3 ['eric-wieser', 'github-actions', 'mathlib-dependent-issues'] nobody
0-54359
15 hours ago
1-11523
1 day ago
0-1003
16 minutes
36683 rdeager
author:rdeager
 feat(Algebra/Module/LocalizedModule): algebra lemmas for localization equivalences Add uniqueness/bijectivity lemmas for localization factoring maps and a categorical `IsIso` wrapper in `ModuleCat`: - `IsLocalizedModule.linearEquiv_comp`: composition `linearEquiv ∘ₗ f = g` - `IsLocalizedModule.eq_linearEquiv`: a factoring map equals `linearEquiv` - `IsLocalizedModule.bijective`: a factoring map is bijective (analogue of `IsLocalization.bijective`) - `IsLocalizedModule.isIso_of_comp_eq`: categorical `IsIso` for factoring morphism in `ModuleCat` ### Declarations - `IsLocalizedModule.linearEquiv_comp` - `IsLocalizedModule.eq_linearEquiv` - `IsLocalizedModule.bijective` - `IsLocalizedModule.isIso_of_comp_eq` ### Motivation These lemmas are needed by the pushforward-tilde iso for quasi-coherent sheaves ([Stacks, Tag 01I9], Part 2), where the comparison map on each basic open `D(r)` factors between two localizations of global sections. They will be used in a follow-up PR adding `Mathlib.AlgebraicGeometry.Modules.PushforwardTilde`. ### Details The algebra lemmas (`linearEquiv_comp`, `eq_linearEquiv`, `bijective`) are placed in `LocalizedModule/Basic.lean` alongside the existing `linearEquiv`. The categorical wrapper `isIso_of_comp_eq` uses `eq_linearEquiv` to show the factoring morphism equals the canonical `linearEquiv`, then lifts to `IsIso` via `ModuleIso`. ### AI Assistance This PR was developed with Claude Code (Claude Opus). The tool was used for proof development, API discovery, and code formatting. All code has been reviewed and verified by the author. t-algebra new-contributor LLM-generated
label:t-algebra$
 34/0 Mathlib/Algebra/Category/ModuleCat/Localization.lean,Mathlib/Algebra/Module/LocalizedModule/Basic.lean 2 2 ['github-actions'] nobody
0-54312
15 hours ago
1-53023
1 day ago
1-53610
1 day
36582 kim-em
author:kim-em
 feat: run inferInstanceAs% normalization when deriving This PR intercepts `def ... deriving ...` and `deriving instance ... for ...` commands that use the delta deriving handler, and runs the `normalizeInstance` machinery from `inferInstanceAs%` on the synthesized instances. This fixes carrier type leakage at `reducibleAndInstances` transparency for all delta-derived instances across Mathlib. The implementation copies `mkInst` and `processDefDeriving` from `Lean.Elab.Deriving.Basic` (Lean 4.29.0-rc6) and adds the normalization step. This is intentionally a temporary copy: once we settle on the right behavior, it will be upstreamed into Lean 4. - [ ] depends on: #35950 🤖 Prepared with Claude Code large-import blocked-by-other-PR LLM-generated 353/3 Mathlib/Init.lean,Mathlib/Tactic/DerivingInferInstanceAs.lean,Mathlib/Tactic/InferInstanceAsPercent.lean,MathlibTest/DerivingInferInstanceAs.lean 4 2 ['github-actions', 'mathlib-dependent-issues'] nobody
0-54297
15 hours ago
4-7280
4 days ago
0-218
3 minutes
36443 Fieldnote-Echo
author:Fieldnote-Echo
 feat(Combinatorics/SimpleGraph): add SimpleGraph.ball (open metric ball) Add `SimpleGraph.ball`, the open ball in the graph extended metric. ## Design decisions - **Open ball** (strict `<`, not `≤`): `ball c ⊤` coincides with the connected component of `c`, whereas a closed ball would give `closedBall c ⊤ = univ`. - **Named `SimpleGraph.ball`** (not `eball`): since `dist`-valued balls are less natural for disconnected graphs, the `e` prefix is unnecessary. - **Graph-specific** (not via `PseudoEMetricSpace`): avoids importing `ℝ`. AI assistance: Claude (Opus 4.6) helped draft and iterate on the implementation. I reviewed the code line by line and vouch for the final contents. Discussed on [Zulip](https://leanprover.zulipchat.com/#narrow/channel/252551-graph-theory/topic/SimpleGraph.20metric.20balls/with/577846803). --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-combinatorics new-contributor LLM-generated 59/3 Mathlib/Combinatorics/SimpleGraph/Metric.lean 1 36 ['Fieldnote-Echo', 'Rida-Hamadani', 'SnirBroshi', 'github-actions', 'lauramonk', 'vlad902'] nobody
0-54290
15 hours ago
6-52802
6 days ago
6-52757
6 days
36426 kim-em
author:kim-em
 chore: disable checkType env_linter This PR disables the `checkType` env_linter, which takes ~44% of total linting time to type-check every declaration statement. This is redundant since all declarations are already type-checked when added to the environment, and external kernel checkers (lean4checker, trepplein) verify Mathlib regularly. No one on Zulip recalls ever seeing it fire in practice. 🤖 Prepared with Claude Code LLM-generated 8/0 Mathlib/Init.lean 1 3 ['JovanGerb', 'Vierkantor', 'github-actions'] alexjbest
assignee:alexjbest
0-54285
15 hours ago
7-1767
7 days ago
7-4927
7 days
36423 kim-em
author:kim-em
 perf: decompress already-cached files concurrently with downloads This PR builds on https://github.com/leanprover-community/mathlib4/pull/32987 (pipeline downloads and decompression) and https://github.com/leanprover-community/mathlib4/pull/36367 (fix: decompress already downloaded files). Previously, already-cached `.ltar` files were only decompressed after all downloads completed, in the final `unpackCache` sweep. This PR starts decompressing them concurrently with downloads by spawning `leantar` as a background task before the download phase begins. The two decompression paths operate on disjoint file sets (pre-cached vs newly downloaded), so there is no conflict. In the common case where a user has most files cached but a few hundred to download, this overlaps several seconds of decompression with network I/O. 🤖 Prepared with Claude Code LLM-generated 73/26 Cache/IO.lean,Cache/Requests.lean 2 1 ['github-actions'] urkud
assignee:urkud
0-54281
15 hours ago
7-8652
7 days ago
7-8607
7 days
36320 ZRTMRH
author:ZRTMRH
 feat(Combinatorics): add Schreier graph definition and covering property Defines Schreier graphs as quivers with labeled edges. `SchreierGraph V ι`: type alias for vertices with quiver structure `schreierGraphLabelling`: prefunctor extracting edge labels `schreierGraphLabelling_isCovering`: the labelling is a covering for group actions `schreierGraph_action_commute`: label-preserving maps commute with the action Ported from [Lean 3 PR #18693](https://github.com/leanprover-community/mathlib3/pull/18693). This PR was written with AI assistance (Claude). The code has been reviewed by the author and their advisor. --- This is the first in a series of PRs splitting #35467 into smaller pieces, as suggested by reviewers. Upcoming PRs will add word evaluation, paths, connectivity, automorphisms, examples, and Cayley sum graphs. t-combinatorics new-contributor LLM-generated 175/0 Mathlib.lean,Mathlib/Combinatorics/Quiver/Schreier.lean 2 2 ['github-actions'] nobody
0-54275
15 hours ago
9-55805
9 days ago
9-55760
9 days
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 awaiting-author LLM-generated 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 6 ['JovanGerb', 'github-actions', 'grunweg'] dwrensha
assignee:dwrensha
0-54271
15 hours ago
11-20210
11 days ago
11-22345
11 days
36129 kbuzzard
author:kbuzzard
 chore: make sheaves into a full subcategory of presheaves Make sheaves into a full subcategory of presheaves. This was done entirely by Claude and it will be interesting to compare with Joel Riou's manual attempt to do the same thing at #36081. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) WIP merge-conflict LLM-generated 982/964 Mathlib/Algebra/Category/ModuleCat/Presheaf/Sheafification.lean,Mathlib/Algebra/Category/ModuleCat/Presheaf/Sheafify.lean,Mathlib/Algebra/Category/ModuleCat/Sheaf.lean,Mathlib/Algebra/Category/ModuleCat/Sheaf/Abelian.lean,Mathlib/Algebra/Category/ModuleCat/Sheaf/ChangeOfRings.lean,Mathlib/Algebra/Category/ModuleCat/Sheaf/Colimits.lean,Mathlib/Algebra/Category/ModuleCat/Sheaf/Limits.lean,Mathlib/Algebra/Category/ModuleCat/Sheaf/Localization.lean,Mathlib/Algebra/Category/ModuleCat/Sheaf/PullbackContinuous.lean,Mathlib/Algebra/Category/ModuleCat/Sheaf/PullbackFree.lean,Mathlib/Algebra/Category/ModuleCat/Sheaf/PushforwardContinuous.lean,Mathlib/AlgebraicGeometry/AffineScheme.lean,Mathlib/AlgebraicGeometry/GammaSpecAdjunction.lean,Mathlib/AlgebraicGeometry/GluingOneHypercover.lean,Mathlib/AlgebraicGeometry/Modules/Presheaf.lean,Mathlib/AlgebraicGeometry/Modules/Sheaf.lean,Mathlib/AlgebraicGeometry/Modules/Tilde.lean,Mathlib/AlgebraicGeometry/Morphisms/QuasiCompact.lean,Mathlib/AlgebraicGeometry/ProjectiveSpectrum/StructureSheaf.lean,Mathlib/AlgebraicGeometry/Sites/Representability.lean,Mathlib/AlgebraicGeometry/Spec.lean,Mathlib/AlgebraicGeometry/SpreadingOut.lean,Mathlib/AlgebraicGeometry/StructureSheaf.lean,Mathlib/CategoryTheory/Generator/Sheaf.lean,Mathlib/CategoryTheory/Sites/Adjunction.lean,Mathlib/CategoryTheory/Sites/CartesianClosed.lean,Mathlib/CategoryTheory/Sites/CartesianMonoidal.lean,Mathlib/CategoryTheory/Sites/Coherent/Equivalence.lean,Mathlib/CategoryTheory/Sites/Coherent/ExtensiveColimits.lean,Mathlib/CategoryTheory/Sites/Coherent/ExtensiveSheaves.lean,Mathlib/CategoryTheory/Sites/Coherent/LocallySurjective.lean,Mathlib/CategoryTheory/Sites/Coherent/SequentialLimit.lean,Mathlib/CategoryTheory/Sites/Coherent/SheafComparison.lean,Mathlib/CategoryTheory/Sites/ConcreteSheafification.lean,Mathlib/CategoryTheory/Sites/ConstantSheaf.lean,Mathlib/CategoryTheory/Sites/Continuous.lean,Mathlib/CategoryTheory/Sites/CoverLifting.lean,Mathlib/CategoryTheory/Sites/CoverPreserving.lean,Mathlib/CategoryTheory/Sites/DenseSubsite/Basic.lean,Mathlib/CategoryTheory/Sites/DenseSubsite/OneHypercoverDense.lean,Mathlib/CategoryTheory/Sites/DenseSubsite/SheafEquiv.lean,Mathlib/CategoryTheory/Sites/Descent/IsPrestack.lean,Mathlib/CategoryTheory/Sites/Equivalence.lean,Mathlib/CategoryTheory/Sites/GlobalSections.lean,Mathlib/CategoryTheory/Sites/Hypercover/One.lean,Mathlib/CategoryTheory/Sites/Limits.lean,Mathlib/CategoryTheory/Sites/Localization.lean,Mathlib/CategoryTheory/Sites/LocallyBijective.lean,Mathlib/CategoryTheory/Sites/LocallyFullyFaithful.lean,Mathlib/CategoryTheory/Sites/LocallyInjective.lean,Mathlib/CategoryTheory/Sites/LocallySurjective.lean,Mathlib/CategoryTheory/Sites/MayerVietorisSquare.lean,Mathlib/CategoryTheory/Sites/Over.lean,Mathlib/CategoryTheory/Sites/Point/Skyscraper.lean,Mathlib/CategoryTheory/Sites/RegularEpi.lean,Mathlib/CategoryTheory/Sites/Sheaf.lean,Mathlib/CategoryTheory/Sites/SheafHom.lean,Mathlib/CategoryTheory/Sites/Sheafification.lean,Mathlib/CategoryTheory/Sites/Subcanonical.lean,Mathlib/CategoryTheory/Sites/Subsheaf.lean,Mathlib/CategoryTheory/Sites/Types.lean,Mathlib/CategoryTheory/Sites/Whiskering.lean,Mathlib/Condensed/Basic.lean,Mathlib/Condensed/Discrete/Characterization.lean,Mathlib/Condensed/Discrete/Colimit.lean,Mathlib/Condensed/Discrete/LocallyConstant.lean,Mathlib/Condensed/Discrete/Module.lean,Mathlib/Condensed/Epi.lean,Mathlib/Condensed/Equivalence.lean,Mathlib/Condensed/Explicit.lean,Mathlib/Condensed/Light/Basic.lean,Mathlib/Condensed/Light/Epi.lean,Mathlib/Condensed/Light/Explicit.lean,Mathlib/Condensed/Light/InternallyProjective.lean,Mathlib/Condensed/Light/Module.lean,Mathlib/Condensed/Light/TopCatAdjunction.lean,Mathlib/Condensed/Module.lean,Mathlib/Condensed/TopCatAdjunction.lean,Mathlib/Condensed/TopComparison.lean,Mathlib/Geometry/Manifold/Sheaf/Basic.lean,Mathlib/Geometry/Manifold/Sheaf/LocallyRingedSpace.lean,Mathlib/Geometry/Manifold/Sheaf/Smooth.lean,Mathlib/Geometry/RingedSpace/Basic.lean,Mathlib/Topology/Sheaves/CommRingCat.lean,Mathlib/Topology/Sheaves/Functors.lean,Mathlib/Topology/Sheaves/Sheaf.lean,Mathlib/Topology/Sheaves/SheafCondition/Sites.lean,Mathlib/Topology/Sheaves/SheafCondition/UniqueGluing.lean,Mathlib/Topology/Sheaves/Skyscraper.lean,Mathlib/Topology/Sheaves/Stalks.lean 90 2 ['github-actions', 'mathlib-merge-conflicts'] nobody
0-54266
15 hours ago
12-63768
12 days ago
0-2
2 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'] dagurtomas
assignee:dagurtomas
0-54186
15 hours ago
12-68889
12 days ago
12-68844
12 days
36016 kim-em
author:kim-em
 chore(scripts): add analyze_defeq_abuse.py and gist updater (not for merging!) This PR adds `scripts/analyze_defeq_abuse.py`, which classifies every `set_option backward.isDefEq.respectTransparency false in` in Mathlib using `#defeq_abuse`, recording results in a SQLite database, and `scripts/update_defeq_abuse_gist.py` which publishes the frequent failure patterns to a GitHub gist. Current gist: https://gist.github.com/kim-em/6a26f33c00bf444502eddf05296ec644 🤖 Prepared with Claude Code CI LLM-generated 1244/0 .gitignore,scripts/README.md,scripts/analyze_defeq_abuse.py,scripts/update_defeq_abuse_gist.py 4 1 ['github-actions'] nobody
0-54176
15 hours ago
unknown
0-0
0 seconds
35950 kim-em
author:kim-em
 feat(Tactic): add inferInstanceAs% to fix type leakage This PR adds `inferInstanceAs%`, a drop-in replacement for `inferInstanceAs` that prevents "type leakage" in synthesized instances. When `inferInstanceAs (SomeClass A)` is used to define `SomeClass B` (where `B` is a non-reducible alias for `A`), the synthesized instance may contain lambda binder domains (and other sub-expressions) referring to `A` or deeper unfoldings instead of `B`. This is invisible at `default` transparency but causes `isDefEq` failures at `reducibleAndInstances` transparency — which is the level used by `grind`'s `checkInst`. `inferInstanceAs%` fixes this by recursively normalizing the constructor tree: it WHNFs to expose the constructor, patches carrier type parameters via `isDefEq` matching against the unfolding chain, recursively processes instance-implicit fields, and replaces lambda binder domains in function fields. As a demonstration, this fixes the `grind` failure in `FiniteResidueField` that was worked around with `#adaptation_note` and a manual proof on `nightly-testing`. 🤖 Prepared with Claude Code t-meta large-import merge-conflict LLM-generated 481/12 Mathlib.lean,Mathlib/Algebra/Order/Ring/StandardPart.lean,Mathlib/Init.lean,Mathlib/Tactic.lean,Mathlib/Tactic/InferInstanceAsPercent.lean,MathlibTest/InferInstanceAsPercent.lean 6 47 ['JovanGerb', 'MichaelStollBayreuth', 'adomani', 'astrainfinita', 'github-actions', 'kim-em', 'leanprover-radar', 'mathlib-bors', 'mathlib-merge-conflicts', 'riccardobrasca'] JovanGerb
assignee:JovanGerb
0-54172
15 hours ago
4-7240
4 days ago
8-50750
8 days
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 awaiting-author LLM-generated 103/0 Mathlib/CategoryTheory/Monoidal/Rigid/Basic.lean 1 7 ['github-actions', 'joelriou', 'kim-em', 'robin-carlier'] nobody
0-54111
15 hours ago
24-48284
24 days ago
3-19507
3 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 merge-conflict LLM-generated 51/3 Mathlib/CategoryTheory/Galois/EssSurj.lean,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'] joneugster
assignee:joneugster
0-54110
15 hours ago
28-11578
28 days ago
37-27992
37 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
0-54109
15 hours ago
69-19059
69 days ago
0-7055
1 hour
34557 kim-em
author:kim-em
 feat(Topology/Homotopy): add Path.subpathOn for restricting paths to subintervals This PR adds `Path.subpathOn`, which extracts a subpath from a path γ on an interval [a, b] ⊆ [0, 1] by reparametrizing via the affine map t ↦ a + t(b - a). ### Main results - `Path.subpathOn`: definition of the restricted path - `Path.subpathOn_trans`: composing subpaths is homotopic to the combined subpath - `Path.subpathOn_self`: the trivial subpath [a,a] is homotopic to the constant path - `Path.subpathOn_zero_one`: the full subpath [0,1] is homotopic to the original path - Quotient-level versions of these theorems This material is split out from https://github.com/leanprover-community/mathlib4/pull/31576 to allow independent review. PR #31576 will depend on this PR once merged. 🤖 Prepared with Claude Code t-topology awaiting-author LLM-generated 216/0 Mathlib.lean,Mathlib/Topology/Homotopy/Path.lean,Mathlib/Topology/UnitInterval.lean,Mathlib/Topology/UnitInterval/ConvexSpace.lean 4 8 ['github-actions', 'jcommelin'] jcommelin
assignee:jcommelin
0-54108
15 hours ago
26-82692
26 days ago
17-33035
17 days
34558 kim-em
author:kim-em
 feat(Topology): add StrictMono finite partition lemmas and path partitioning This PR adds: **In `UnitInterval.lean`:** - `exists_strictMono_Icc_subset_open_cover_Icc`: finite partition with strictly monotone points indexed by `Fin (n + 1)` for general closed intervals - `exists_strictMono_Icc_subset_open_cover_unitInterval`: the unit interval version - `continuous_convexCombo`: continuity of convex combinations **In `Path.lean`:** - `Path.exists_partition_in_cover`: Lebesgue partition lemma for paths - any open cover of a path's range can be refined to a finite partition - `Path.exists_partition_with_property`: neighborhood version - if every point on a path has a neighborhood with property P, get a partition with each segment in such a neighborhood These are useful for path homotopy arguments where a finite, strict partition is needed. This is split out from https://github.com/leanprover-community/mathlib4/pull/31576 to allow independent review. 🤖 Prepared with Claude Code t-topology awaiting-author LLM-generated 174/0 Mathlib/Topology/Path.lean,Mathlib/Topology/UnitInterval.lean 2 16 ['botbaki-review', 'github-actions', 'jcommelin', 'kim-em'] jcommelin
assignee:jcommelin
0-54107
15 hours ago
20-1766
20 days ago
26-83695
26 days
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
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 1 ['github-actions'] nobody
0-54107
15 hours ago
unknown
0-0
0 seconds
34969 kim-em
author:kim-em
 feat(RingTheory/HopfAlgebra): prove antipode is antihomomorphism This PR proves that the antipode of a Hopf algebra is an antihomomorphism: `antipode (a * b) = antipode b * antipode a`. The proof uses the convolution algebra structure on `(A ⊗ A) →ₗ[R] A` and shows that `S ∘ μ` and `μ ∘ (S ⊗ S) ∘ comm` are both convolution inverses of `μ`, hence they must be equal by uniqueness of inverses. This resolves a TODO listed in the file header. 🤖 Prepared with Claude Code t-ring-theory LLM-generated 88/2 Mathlib/RingTheory/HopfAlgebra/Basic.lean 1 1 ['github-actions'] erdOne
assignee:erdOne
0-54106
15 hours ago
36-8982
36 days ago
36-8937
36 days
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
0-54105
15 hours ago
unknown
0-0
0 seconds
35209 kim-em
author:kim-em
 chore: use @[to_dual] extensively in CompleteLattice This PR adds `@[to_dual]` and `@[to_dual existing]` annotations extensively in `CompleteLattice/Defs.lean` and `CompleteLattice/Basic.lean`, auto-generating many dual theorems and deleting the hand-written versions. [Diff relative to previous PR](https://github.com/kim-em/mathlib4/compare/kim/to-dual-bounds-basic...kim/to-dual-complete-lattice) - [x] depends on: #35208 🤖 Prepared with Claude Code LLM-generated 182/483 Mathlib/Order/Bounds/Basic.lean,Mathlib/Order/CompleteLattice/Basic.lean,Mathlib/Order/CompleteLattice/Defs.lean 3 38 ['github-actions', 'kim-em', 'mathlib-dependent-issues', 'mathlib-merge-conflicts', 'vihdzp'] dupuisf
assignee:dupuisf
0-54104
15 hours ago
13-21384
13 days ago
20-16488
20 days
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 blocked-by-other-PR merge-conflict LLM-generated 217/579 Mathlib/Data/Set/Lattice.lean,Mathlib/Order/Bounds/Basic.lean,Mathlib/Order/CompleteLattice/Basic.lean,Mathlib/Order/CompleteLattice/Defs.lean,Mathlib/Order/CompleteLattice/Finset.lean,Mathlib/Order/CompleteLattice/Lemmas.lean,Mathlib/Tactic/SetLike.lean 7 5 ['github-actions', 'mathlib-dependent-issues', 'mathlib-merge-conflicts'] nobody
0-54103
15 hours ago
32-27037
32 days ago
0-918
15 minutes
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 blocked-by-other-PR merge-conflict LLM-generated 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
0-54102
15 hours ago
32-26058
32 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
0-54101
15 hours ago
32-26057
32 days ago
0-663
11 minutes
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 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 10 ['JovanGerb', 'github-actions', 'kim-em', 'mathlib-dependent-issues', 'mathlib-merge-conflicts', 'vihdzp'] alexjbest
assignee:alexjbest
0-54100
15 hours ago
13-21715
13 days ago
20-66694
20 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. **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. 🤖 Prepared with Claude Code documentation awaiting-author enhancement merge-conflict LLM-generated 241/3 .claude/skills/to_dual/SKILL.md,Mathlib/Tactic/Translate/ToDual.lean 2 30 ['JovanGerb', 'MichaelStollBayreuth', 'github-actions', 'kim-em', 'mathlib-merge-conflicts', 'vihdzp'] JovanGerb
assignee:JovanGerb
0-54100
15 hours ago
25-38098
25 days ago
6-73284
6 days
35233 kim-em
author:kim-em
 chore: lake shake --add-public --keep-implied --keep-prefix --fix This PR runs `lake shake --add-public --keep-implied --keep-prefix --fix` again after https://github.com/leanprover-community/mathlib4/pull/34511, picking up the remaining 28 files that now have suggestions. 🤖 Prepared with Claude Code large-import maintainer-merge awaiting-author LLM-generated 13/12 Mathlib/Algebra/Category/ModuleCat/Sheaf/Quasicoherent.lean,Mathlib/Analysis/Distribution/SchwartzSpace/Basic.lean,Mathlib/Data/Nat/Init.lean,Mathlib/LinearAlgebra/Matrix/Kronecker.lean,Mathlib/LinearAlgebra/TensorProduct/Basic.lean,Mathlib/LinearAlgebra/TensorProduct/Defs.lean,Mathlib/LinearAlgebra/TensorProduct/Map.lean,Mathlib/Logic/Basic.lean,Mathlib/Logic/Relation.lean,Mathlib/RingTheory/MatrixAlgebra.lean,Mathlib/Tactic/Hint.lean,Mathlib/Tactic/Linter/FindDeprecations.lean,Mathlib/Tactic/Nontriviality/Core.lean,Mathlib/Tactic/NormNum/Result.lean,Mathlib/Tactic/Order/CollectFacts.lean,Mathlib/Tactic/Tauto.lean 16 16 ['TwoFX', 'Vierkantor', 'adomani', 'bryangingechen', 'github-actions', 'joneugster', 'kim-em', 'mathlib-merge-conflicts', 'mathlib-splicebot'] nobody
0-54096
15 hours ago
12-84855
12 days ago
24-63259
24 days
35518 kim-em
author:kim-em
 chore: forbid prime (') in filenames, rename LinearCombination' This PR renames `Mathlib/Tactic/LinearCombination'.lean` to `LinearCombinationPrime.lean` (and the corresponding test file), and adds a lint check to `modulesOSForbidden` to prevent future files with prime/apostrophe characters in their names. The `'` character in filenames causes shell escaping issues in scripts (any `find ... -name '*.lean'` or similar pattern needs careful quoting to handle these files correctly). 🤖 Prepared with Claude Code file-removed t-meta merge-conflict LLM-generated 13/8 Mathlib.lean,Mathlib/Tactic.lean,Mathlib/Tactic/LinearCombinationPrime.lean,Mathlib/Tactic/Linter/TextBased.lean,Mathlib/Tactic/Linter/UnusedTactic.lean,MathlibTest/linear_combination_prime.lean 6 7 ['eric-wieser', 'euprunin', 'github-actions', 'kim-em', 'mathlib-merge-conflicts'] adamtopaz
assignee:adamtopaz
0-54095
15 hours ago
23-75208
23 days ago
23-78349
23 days
35763 kim-em
author:kim-em
 chore(scripts): make rm_set_option cache opt-in via --resume This PR changes `scripts/rm_set_option.py` so the progress cache is only used when explicitly requested via `--resume`, rather than being on by default (with `--no-resume` to disable). The previous default was unsafe: the cache only checks that the target module's own SHA256 is unchanged, so edits to upstream modules between runs would be silently ignored, causing the script to skip modules that should be reprocessed. 🤖 Prepared with Claude Code LLM-generated 4/4 scripts/README.md,scripts/rm_set_option.py 2 1 ['github-actions'] dupuisf
assignee:dupuisf
0-54095
15 hours ago
19-64972
19 days ago
19-64927
19 days
35826 quangvdao
author:quangvdao
 feat(Probability/ProbabilityMassFunction): total variation distance and MetricSpace instance Define total variation distance on probability mass functions, provide a `MetricSpace` instance, and prove the data processing inequality. The extended TV distance `PMF.etvDist` is defined in `ℝ≥0∞` as `(1/2) ∑ x, absDiff (p x) (q x)`, using a new symmetric absolute difference `ENNReal.absDiff`. The real-valued `PMF.tvDist` is its `toReal`. New definitions: - `ENNReal.absDiff`: symmetric absolute difference `(a - b) + (b - a)` - `PMF.etvDist`: extended total variation distance - `PMF.tvDist`: real-valued total variation distance - `PMF.instMetricSpace`: `MetricSpace` instance on `PMF α` Main results: - `ENNReal.absDiff_triangle`: triangle inequality for `absDiff` - `ENNReal.absDiff_tsum_le`: subadditivity over infinite sums - `PMF.etvDist_le_one`: TV distance is at most 1 - `PMF.etvDist_map_le`: data processing inequality (deterministic maps) - `PMF.etvDist_bind_right_le`: data processing inequality (Markov kernels) - `PMF.etvDist_option_punit`: closed form for binary distributions Supersedes #33680 with a complete, sorry-free implementation. See Zulip discussion: This PR was authored with the support of Claude (Cursor IDE). --- This PR provides a complete formalization of total variation distance for PMFs, including: 1. **`ENNReal.absDiff`** (`Mathlib/Data/ENNReal/AbsDiff.lean`): A symmetric absolute difference for `ℝ≥0∞` with triangle inequality, connection to real absolute value, and algebraic properties. The tsum-related lemmas (`absDiff_tsum_le`, `tsum_fiber`) are placed in the TV distance file to avoid pulling topology imports into `Data.ENNReal`. 2. **`PMF.etvDist` / `PMF.tvDist`** (`Mathlib/Probability/ProbabilityMassFunction/TotalVariation.lean`): Total variation distance with a `MetricSpace` instance, data processing inequality for both deterministic maps and Markov kernels, and a closed form for binary distributions. Compared to #33680, this PR: - Has no `sorry`s - Defines the distance in `ℝ≥0∞` first (following Mathlib convention for `edist`/`dist`) - Includes the data processing inequality - Has full documentation and passes all Mathlib linters Made with [Cursor](https://cursor.com) t-measure-probability LLM-generated 459/0 Mathlib.lean,Mathlib/Data/ENNReal/AbsDiff.lean,Mathlib/Probability/ProbabilityMassFunction/TotalVariation.lean 3 6 ['BoltonBailey', 'EtienneC30', 'github-actions', 'joneugster', 'quangvdao'] RemyDegenne
assignee:RemyDegenne
0-54064
15 hours ago
10-31988
10 days ago
10-32724
10 days
35755 Vilin97
author:Vilin97
 feat(Analysis/ODE): forward Euler method convergence ## Summary - Define the forward Euler method (`ODE.EulerMethod.step`, `point`, `slope`, `path`, `deriv`) in `Analysis/ODE/EulerMethod.lean`. - Prove the local truncation error bound `dist_deriv_le`: `dist(deriv(t), v(t, path(t))) ≤ h*(L + K*M)`. - Prove the global error bound `dist_path_le` via Gronwall's inequality. - Prove convergence `tendsto_path`: `path(v, h, t₀, y₀, t) → sol(t)` as `h → 0⁺`. ## Motivation The forward Euler method is the simplest numerical method for ODEs and a natural complement to the existing Gronwall inequality (`Mathlib.Analysis.ODE.Gronwall`) and Picard-Lindelöf theorem (`Mathlib.Analysis.ODE.PicardLindelof`). This formalization is based on the [forward_euler](https://github.com/Vilin97/forward_euler) project. Depends on #35753. --- 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). new-contributor WIP LLM-generated 297/0 Mathlib.lean,Mathlib/Analysis/ODE/EulerMethod.lean,Mathlib/Topology/Algebra/Order/Floor.lean,Mathlib/Topology/Algebra/Order/PiecewiseLinear.lean 4 3 ['github-actions'] nobody
0-54055
15 hours ago
19-78813
19 days ago
0-674
11 minutes
35753 Vilin97
author:Vilin97
 feat(Topology/Algebra/Order): regular grid helpers and piecewise linear interpolation ## Summary - Add `Nat.floor_div_eq_of_mem_Ico`, `mem_Ico_Nat_floor_div`, `locallyFinite_Icc_grid`, and `ContinuousOn.of_Icc_grid` to `Topology/Algebra/Order/Floor.lean`. - Add new file `Topology/Algebra/Order/PiecewiseLinear.lean` with `piecewiseLinear` and `piecewiseConst` definitions for interpolation on regular grids, along with evaluation lemmas, continuity, and right derivative. - Grid helpers are generalized over `Field K` with `FloorSemiring` and `OrderTopology`. - Piecewise definitions are generic over `Field α`; continuity/derivative results are for `ℝ`-normed spaces. ## Motivation These are used in the [forward Euler convergence proof](https://github.com/Vilin97/forward_euler) to construct piecewise linear interpolations of Euler points and prove their continuity. They are general-purpose lemmas about regular grids and piecewise interpolation that should be useful beyond this application. Follow-up PR: #35755 (forward Euler method convergence). --- 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). t-topology new-contributor awaiting-author LLM-generated 151/0 Mathlib.lean,Mathlib/Topology/Algebra/Order/Floor.lean,Mathlib/Topology/Algebra/Order/PiecewiseLinear.lean 3 7 ['copilot-pull-request-reviewer', 'dagurtomas', 'github-actions', 'wwylele'] dagurtomas
assignee:dagurtomas
0-54050
15 hours ago
13-28630
13 days ago
19-79176
19 days
35472 rao107
author:rao107
 feat(Probability): add `CharacteristicFunction` section to binomial distribution Adds characteristic function, mgf, and cgf of the binomial distribution. Also adds Integrable lemmas for binomial. This commit based heavily off of the CharacteristicFunction section for the Gaussian distribution. This PR is an alteration of #34866 which would have added similar theorems and lemmas. However, this PR builds on top of the API that @YaelDillies wrote in #28248. To be forthcoming, I used Claude Code to help with the proofs of `complexMGF_id_binomialReal` and `integrable_exp_mul_binomialReal`. The proofs are structured how I would want them and I would vouch for them. Any comments or suggestions for improvements are very welcome, thanks! --- - [ ] depends on: #28248 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor t-measure-probability blocked-by-other-PR LLM-generated 367/0 Mathlib.lean,Mathlib/MeasureTheory/Integral/Bochner/Set.lean,Mathlib/Probability/Distributions/Binomial.lean 3 3 ['github-actions', 'mathlib-dependent-issues'] nobody
0-53952
14 hours ago
26-80684
26 days ago
0-368
6 minutes
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 29 ['A-M-Berns', 'eric-wieser', 'github-actions', 'joneugster', 'mathlib-dependent-issues', 'mathlib-merge-conflicts', 'vihdzp', 'wwylele'] JovanGerb
assignee:JovanGerb
0-53943
14 hours ago
19-44640
19 days ago
21-78881
21 days
34892 kim-em
author:kim-em
 experiment: by claude LLM-generated 88/0 claude.md 1 1 ['github-actions'] nobody
0-53937
14 hours ago
unknown
0-0
0 seconds
34705 mpenciak
author:mpenciak
 feat(AlgebraicGeometry): Grassmannian functor This PR shows that the association `A → A ⊗[R] M` for an `R`-module `M`, and `R`-algebra `A` forms a functor. (Disclosure: This PR was partially prepared by Claude) --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-ring-theory LLM-generated 107/2 Mathlib/LinearAlgebra/TensorProduct/Tower.lean,Mathlib/RingTheory/Grassmannian.lean 2 7 ['github-actions', 'mathlib-merge-conflicts', 'mpenciak', 'robin-carlier'] mariainesdff
assignee:mariainesdff
0-53921
14 hours ago
14-26496
14 days ago
31-32137
31 days
34442 JohnnyTeutonic
author:JohnnyTeutonic
 feat(Algebra/Lie/Classical): add basis for sl(n) relative to chosen diagonal index Adds a standard basis for sl n R parametrized by a chosen diagonal index i₀: Off-diagonal matrix units E_ij for i ≠ j Diagonal differences E_ii - E_{i₀i₀} for i ≠ i₀ The entry at i₀ is determined by trace-zero. Implements the approach suggested by @ocfnash in [#33818 (comment)](https://github.com/leanprover-community/mathlib4/pull/33818#issuecomment-3784786673). See also [Zulip discussion](https://leanprover.zulipchat.com/#narrow/channel/217875-Is-there-code-for-X.3F/topic/lie.20algebra/near/516170116). Closes the request from #33818. Note: Developed with the assistance of Claude - the LinearEquiv machinery was beyond my current Lean expertise. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra awaiting-author LLM-generated
label:t-algebra$
 507/0 Mathlib/Algebra/Lie/Classical.lean 1 10 ['JohnnyTeutonic', 'eric-wieser', 'github-actions', 'riccardobrasca'] riccardobrasca
assignee:riccardobrasca
0-53907
14 hours ago
32-84236
32 days ago
33-60705
33 days
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
0-53890
14 hours ago
68-71699
68 days ago
0-112
1 minute
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
0-53885
14 hours ago
53-430
53 days ago
0-795
13 minutes
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
0-53880
14 hours ago
34-59396
34 days ago
63-18466
63 days
31576 kim-em
author:kim-em
 feat: in a semilocally simply connected, locally path-connected space, the quotient of paths by homotopy has the discrete topology This is closely related to, but not quite the same, as the quotient path space with fixed initial point being an even covering (under the endpoint map). Depends on - [ ] #31449 - [x] #31525 - [x] #31574 - [x] #31575 - [ ] #34557 - [ ] #34558 Claude wrote most of the text, under my prompting. LLM-generated 1574/1 Mathlib.lean,Mathlib/AlgebraicTopology/FundamentalGroupoid/Basic.lean,Mathlib/AlgebraicTopology/FundamentalGroupoid/SemilocallySimplyConnected.lean,Mathlib/LinearAlgebra/AffineSpace/Simplex/Centroid.lean,Mathlib/Topology/Connected/PathConnected.lean,Mathlib/Topology/Homotopy/Path.lean,Mathlib/Topology/Path.lean,Mathlib/Topology/UnitInterval.lean 8 6 ['github-actions', 'mathlib-merge-conflicts', 'mathlib4-merge-conflict-bot'] nobody
0-53872
14 hours ago
unknown
0-0
0 seconds
31449 kim-em
author:kim-em
 feat(SemilocallySimplyConnected): definition and alternative formulation Note: Proofs in this PR were developed with assistance from Claude. t-topology awaiting-author LLM-generated 266/0 Mathlib.lean,Mathlib/AlgebraicTopology/FundamentalGroupoid/Basic.lean,Mathlib/AlgebraicTopology/FundamentalGroupoid/FundamentalGroup.lean,Mathlib/AlgebraicTopology/FundamentalGroupoid/SemilocallySimplyConnected.lean,Mathlib/Topology/Path.lean 5 17 ['ADedecker', 'alreadydone', 'github-actions', 'jcommelin', 'kim-em', 'mathlib4-merge-conflict-bot'] jcommelin
assignee:jcommelin
0-53864
14 hours ago
26-83309
26 days ago
64-72858
64 days
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 8 ['BoltonBailey', 'eric-wieser', 'github-actions'] nobody
0-53776
14 hours ago
246-28134
246 days ago
0-84441
23 hours
36317 tb65536
author:tb65536
 feat(NumberTheory/NumberField/Discriminant/Basic): define the root discriminant This PR adds the definition of the root discriminant of a number field. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-number-theory t-algebra maintainer-merge
label:t-algebra$
 14/0 Mathlib/NumberTheory/NumberField/Discriminant/Basic.lean 1 4 ['github-actions', 'mariainesdff', 'mathlib-merge-conflicts'] mariainesdff
assignee:mariainesdff
0-52999
14 hours ago
3-75152
3 days ago
9-55597
9 days
27229 WilliamCoram
author:WilliamCoram
 feat(GroupTheory/DoubleCoset): multiple lemmas From FLT --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) FLT t-group-theory new-contributor awaiting-author 82/2 Mathlib/GroupTheory/DoubleCoset.lean 1 46 ['CBirkbeck', 'Ruben-VandeVelde', 'WilliamCoram', 'github-actions', 'kim-em', 'mariainesdff', 'mathlib4-merge-conflict-bot', 'tb65536'] mariainesdff
assignee:mariainesdff
0-52449
14 hours ago
4-58509
4 days ago
114-26006
114 days
36444 mariainesdff
author:mariainesdff
 feat(Algebra/MvPolynomial/Coeff): add lemmas Co-authored by: @AntoineChambert-Loir. --- - [] depends on: ##36441 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-ring-theory WIP 162/1 Mathlib.lean,Mathlib/Algebra/MvPolynomial/Basic.lean,Mathlib/Algebra/MvPolynomial/Coeff.lean,Mathlib/Data/Finsupp/Indicator.lean,Mathlib/Data/Nat/Choose/Multinomial.lean 5 1 ['github-actions'] nobody
0-51281
14 hours ago
6-51377
6 days ago
0-951
15 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 - [ ] depends on: #36391. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) blocked-by-other-PR large-import 973/16 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/Basic.lean,Mathlib/NumberTheory/RamificationInertia/Galois.lean,Mathlib/NumberTheory/RamificationInertia/HilbertTheory.lean,Mathlib/RingTheory/Ideal/Galois.lean,Mathlib/RingTheory/Invariant/Basic.lean 12 2 ['github-actions', 'mathlib-dependent-issues'] nobody
0-51239
14 hours ago
0-56874
15 hours ago
0-48
48 seconds
35337 Thmoas-Guan
author:Thmoas-Guan
 feat(RingTheory): some lemma about span rank In this PR, we proved that for local ring `(R,m)`, the span rank of `M` is equal to dimension of `M/mM` over `R/m` when `M` is fg. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-ring-theory large-import 196/33 Mathlib/Algebra/Module/SpanRank.lean,Mathlib/Algebra/Module/Torsion/Basic.lean,Mathlib/LinearAlgebra/Span/Basic.lean,Mathlib/RingTheory/Ideal/Cotangent.lean,Mathlib/RingTheory/KrullDimension/Regular.lean,Mathlib/RingTheory/LocalRing/RingHom/Basic.lean,Mathlib/SetTheory/Cardinal/ToNat.lean 7 46 ['Thmoas-Guan', 'chrisflav', 'erdOne', 'github-actions'] chrisflav
assignee:chrisflav
0-50997
14 hours ago
0-63453
17 hours ago
11-69905
11 days
36737 mariainesdff
author:mariainesdff
 chore(Algebra/SkewMonoidAlgebra/Basic): generalize lemmas from Monoid to Mul --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra easy
label:t-algebra$
 16/10 Mathlib/Algebra/SkewMonoidAlgebra/Basic.lean 1 1 ['github-actions'] nobody
0-50314
13 hours ago
0-50403
13 hours ago
0-50358
13 hours
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. --- - [ ] depends on: #28682 - [ ] depends on: #28582 [![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 629/33 Mathlib.lean,Mathlib/Algebra/Module/SpanRank.lean,Mathlib/Algebra/Module/Torsion/Basic.lean,Mathlib/LinearAlgebra/Span/Basic.lean,Mathlib/RingTheory/Ideal/Cotangent.lean,Mathlib/RingTheory/Ideal/KrullsHeightTheorem.lean,Mathlib/RingTheory/KrullDimension/Regular.lean,Mathlib/RingTheory/LocalRing/RingHom/Basic.lean,Mathlib/RingTheory/RegularLocalRing/Basic.lean,Mathlib/RingTheory/RegularLocalRing/Defs.lean,Mathlib/SetTheory/Cardinal/ToNat.lean 11 8 ['Thmoas-Guan', 'github-actions', 'mathlib-merge-conflicts', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
0-49851
13 hours ago
208-77713
208 days ago
0-111
1 minute
36692 joelriou
author:joelriou
 feat(Algebra/Category/ModuleCat/Sheaf): `freeFunctor` preserves colimits The functor `freeFunctor : Type u ⥤ SheafOfModules.{u} R` preserves all colimits. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-category-theory t-algebra
label:t-algebra$
 75/0 Mathlib/Algebra/Category/ModuleCat/Sheaf/Free.lean 1 3 ['github-actions', 'joelriou', 'robin-carlier'] nobody
0-49610
13 hours ago
0-53070
14 hours ago
0-70102
19 hours
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. 310/84 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/Nat.lean,lake-manifest.json,lakefile.lean,lean-toolchain 23 7 ['github-actions', 'mathlib-merge-conflicts', 'mattrobball', 'riccardobrasca'] nobody
0-49016
13 hours ago
unknown
0-0
0 seconds
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. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-ring-theory 290/0 Mathlib.lean,Mathlib/RingTheory/Ideal/UFD.lean 2 1 ['github-actions'] nobody
0-48807
13 hours ago
0-48539
13 hours ago
0-49002
13 hours
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 of `Strictness` now have their order typeclass arguments. In order to help `Qq` synth instances property, we have to move `assertInstancesCommute` to inner branch, manually add `haveI'` or explicitly pass the order typeclass instance into `.positive`/`.nonnegative`. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor t-meta awaiting-author 615/325 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/Module/Field.lean,Mathlib/Analysis/Complex/BorelCaratheodory.lean,Mathlib/Analysis/Complex/Order.lean,Mathlib/Analysis/SpecialFunctions/Bernstein.lean,Mathlib/Analysis/SpecialFunctions/Gamma/Basic.lean,Mathlib/Analysis/SpecialFunctions/Pow/NNReal.lean,Mathlib/Analysis/SpecialFunctions/Pow/Real.lean,Mathlib/Analysis/SpecialFunctions/Trigonometric/Arctan.lean,Mathlib/Analysis/SpecialFunctions/Trigonometric/DerivHyp.lean,Mathlib/Combinatorics/Enumerative/DyckWord.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/Totient.lean,Mathlib/Data/Rat/Cast/Order.lean,Mathlib/Data/Real/Sqrt.lean,Mathlib/MeasureTheory/Integral/Bochner/Basic.lean,Mathlib/MeasureTheory/Measure/Real.lean,Mathlib/NumberTheory/ArithmeticFunction/Misc.lean,Mathlib/NumberTheory/ArithmeticFunction/Zeta.lean,Mathlib/NumberTheory/LucasLehmer.lean,Mathlib/Tactic/Positivity/Basic.lean,Mathlib/Tactic/Positivity/Core.lean,Mathlib/Tactic/Positivity/Finset.lean,Mathlib/Topology/Algebra/InfiniteSum/Order.lean 37 9 ['JovanGerb', 'fpvandoorn', 'github-actions', 'joneugster'] JovanGerb
assignee:JovanGerb
0-48067
13 hours ago
28-18528
28 days ago
0-3118
51 minutes
35785 Brian-Nugent
author:Brian-Nugent
 feat(CategoryTheory/Topology): Add Flasque Sheaves This PR defines flasque sheaves on a topological space as sheaves where all restriction morphisms are epimorphisms. The main result of this PR is `TopCat.Sheaf.IsFlasque.epi_of_shortExact` which says a short exact sequence where the first sheaf is flasque remains exact on sections. --- - [x] depends on: #34267 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor t-category-theory 274/0 Mathlib.lean,Mathlib/Topology/Sheaves/AddCommGrpCat.lean,Mathlib/Topology/Sheaves/Flasque.lean,Mathlib/Topology/Sheaves/LocallySurjective.lean,Mathlib/Topology/Sheaves/Presheaf.lean,Mathlib/Topology/Sheaves/SheafCondition/UniqueGluing.lean 6 66 ['Brian-Nugent', 'dagurtomas', 'github-actions', 'joelriou', 'joneugster', 'mathlib-dependent-issues', 'mathlib-merge-conflicts', 'smorel394'] dagurtomas
assignee:dagurtomas
0-47450
13 hours ago
1-74813
1 day ago
8-22146
8 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 385/0 Mathlib.lean,Mathlib/Topology/Category/TopCat/Closeds.lean 2 10 ['Brian-Nugent', 'dagurtomas', 'github-actions'] dagurtomas
assignee:dagurtomas
0-46416
12 hours ago
17-54433
17 days ago
14-59067
14 days
36127 Whysoserioushah
author:Whysoserioushah
 chore(RepresentationTheory): Refactor Rep --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra file-removed
label:t-algebra$
 2258/1522 Mathlib.lean,Mathlib/CategoryTheory/Action/Monoidal.lean,Mathlib/CategoryTheory/Monoidal/Types/Basic.lean,Mathlib/RepresentationTheory/Action.lean,Mathlib/RepresentationTheory/Coinduced.lean,Mathlib/RepresentationTheory/Coinvariants.lean,Mathlib/RepresentationTheory/Equiv.lean,Mathlib/RepresentationTheory/FDRep.lean,Mathlib/RepresentationTheory/FinGroupCharZero.lean,Mathlib/RepresentationTheory/FiniteIndex.lean,Mathlib/RepresentationTheory/Homological/FiniteCyclic.lean,Mathlib/RepresentationTheory/Homological/GroupCohomology/Basic.lean,Mathlib/RepresentationTheory/Homological/GroupCohomology/FiniteCyclic.lean,Mathlib/RepresentationTheory/Homological/GroupCohomology/Functoriality.lean,Mathlib/RepresentationTheory/Homological/GroupCohomology/Hilbert90.lean,Mathlib/RepresentationTheory/Homological/GroupCohomology/LongExactSequence.lean,Mathlib/RepresentationTheory/Homological/GroupCohomology/LowDegree.lean,Mathlib/RepresentationTheory/Homological/GroupCohomology/Shapiro.lean,Mathlib/RepresentationTheory/Homological/GroupHomology/Basic.lean,Mathlib/RepresentationTheory/Homological/GroupHomology/FiniteCyclic.lean,Mathlib/RepresentationTheory/Homological/GroupHomology/Functoriality.lean,Mathlib/RepresentationTheory/Homological/GroupHomology/LongExactSequence.lean,Mathlib/RepresentationTheory/Homological/GroupHomology/LowDegree.lean,Mathlib/RepresentationTheory/Homological/GroupHomology/Shapiro.lean,Mathlib/RepresentationTheory/Homological/Resolution.lean,Mathlib/RepresentationTheory/Induced.lean,Mathlib/RepresentationTheory/Intertwining.lean,Mathlib/RepresentationTheory/Invariants.lean,Mathlib/RepresentationTheory/Rep'/Basic.lean,Mathlib/RepresentationTheory/Rep'/Iso.lean,Mathlib/RepresentationTheory/Rep'/Res.lean,Mathlib/RepresentationTheory/Rep.lean 32 7 ['github-actions', 'mathlib-bors', 'mathlib-merge-conflicts', 'riccardobrasca'] riccardobrasca
assignee:riccardobrasca
0-46373
12 hours ago
2-30806
2 days ago
2-31401
2 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/) 7/33 Mathlib/AlgebraicGeometry/AffineScheme.lean,Mathlib/Combinatorics/SimpleGraph/Connectivity/WalkDecomp.lean,Mathlib/Data/Int/Interval.lean,Mathlib/GroupTheory/Perm/Support.lean 4 1 ['github-actions'] nobody
0-46027
12 hours ago
0-46101
12 hours ago
0-46056
12 hours
36483 justus-springer
author:justus-springer
 feat(CategoryTheory/Abelian): Criterion for full subcategory of abelian category to be abelian If `P` is an object property in an abelian category and - `P` contains zero, - `P` is closed under kernels and cokernels, - `P` is closed under finite products, then the full subcategory defined by `P` is abelian. --- - [x] depends on: #36411 - [ ] depends on: #36481 - [x] depends on: #36482 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) blocked-by-other-PR t-category-theory merge-conflict 474/6 Mathlib.lean,Mathlib/Algebra/Category/FGModuleCat/Abelian.lean,Mathlib/CategoryTheory/Abelian/Subcategory.lean,Mathlib/CategoryTheory/Limits/Preserves/Shapes/Kernels.lean,Mathlib/CategoryTheory/Limits/Preserves/Shapes/Zero.lean,Mathlib/CategoryTheory/Limits/Shapes/NormalMono/Equalizers.lean,Mathlib/CategoryTheory/Limits/Shapes/ZeroMorphisms.lean,Mathlib/CategoryTheory/MorphismProperty/OfObjectProperty.lean,Mathlib/CategoryTheory/ObjectProperty/FiniteProducts.lean,Mathlib/CategoryTheory/ObjectProperty/Kernels.lean,Mathlib/RepresentationTheory/FDRep.lean 11 4 ['github-actions', 'mathlib-dependent-issues', 'mathlib-merge-conflicts'] nobody
0-45778
12 hours ago
5-58762
5 days ago
0-430
7 minutes
34209 mike1729
author:mike1729
 feat(Analysis/Normed): Schauder basis definition and characterization via projections A Schauder basis is a fundamental concept in functional analysis, providing a way to represent every element of a Banach space as a unique convergent series. This PR adds the core structures, some theorems necessary to work with these bases and a characterization of a Schauder basis using projections. This PR is based on Chapter 1. from Albiac, F., & Kalton, N. J. (2016). Topics in Banach Space Theory. This is a first PR in a series of three aiming for Eberlein-Smulyan Theorem. The next one will contain theory of basic sequences and the final one will contain a proof of Eberlein-Smulyan Theorem using basic sequences. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-analysis new-contributor 547/0 Mathlib.lean,Mathlib/Analysis/Normed/Module/Bases.lean,docs/references.bib 3 220 ['Ruben-VandeVelde', 'faenuccio', 'github-actions', 'goliath-klein', 'j-loreaux', 'mike1729', 'sgouezel', 'themathqueen'] sgouezel
assignee:sgouezel
0-45429
12 hours ago
0-45484
12 hours ago
41-78329
41 days
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$
 500/0 Mathlib.lean,Mathlib/Algebra/Module/SemilinearModuleProd.lean 2 1 ['github-actions'] nobody
0-44760
12 hours ago
unknown
0-0
0 seconds
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 86/0 Mathlib/NumberTheory/Transcendental/AnalyticPart.lean 1 5 ['SnirBroshi', 'github-actions', 'mathlib-dependent-issues'] nobody
0-44669
12 hours ago
0-44359
12 hours ago
0-13663
3 hours
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 12 ['FrankieeW', 'MichaelStollBayreuth', 'github-actions', 'mathlib-merge-conflicts', 'tb65536'] MichaelStollBayreuth
assignee:MichaelStollBayreuth
0-43234
12 hours ago
6-60988
6 days ago
15-50831
15 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 24 ['FrankieeW', 'eric-wieser', 'github-actions', 'riccardobrasca', 'tb65536', 'wwylele'] tb65536
assignee:tb65536
0-43226
12 hours ago
7-32170
7 days ago
7-65155
7 days
36387 FrankieeW
author:FrankieeW
 feat(NumberTheory/QuadraticField): parameter uniqueness for quadratic fields - [ ] depends on: #36347 ## 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` --- 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
0-43221
12 hours ago
8-6393
8 days ago
0-2
2 seconds
36734 JovanGerb
author:JovanGerb
 fix(SetTheory/ZFC/Basic): fix diamond for `Membership ZFSet ZFSet` This PR removes the manual instance of `Membership ZFSet ZFSet` in favour of the instance that comes from the `SetLike` instance. The two instances are not defeq in `implicit_reducible` transparency, hence causing a diamond (it relies on the defeq of `{x | x ∈ s}` with `s`). --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-set-theory 15/17 Mathlib/SetTheory/ZFC/Basic.lean 1 1 ['github-actions', 'vihdzp'] nobody
0-42891
11 hours ago
0-49999
13 hours ago
0-50451
14 hours
34636 CoolRmal
author:CoolRmal
 feat(MeasureTheory/Analysis): the Fourier coefficients of a function can be computed by integrating over a box The main result proved in this PR is `integral_preimage`, which is the analogue of the one-dimensional result: [UnitAddCircle.integral_preimage](https://leanprover-community.github.io/mathlib4_docs/Mathlib/MeasureTheory/Integral/IntervalIntegral/Periodic.html#UnitAddCircle.integral_preimage). This theorem allows us to compute an integral over UnitAddTorus as an integral over a box in the Euclidean space. As an application, I prove that the Fourier coefficients of a function can be computed by integrating over a box. The main motivation for this PR is the higher dimensional Poisson summation formula, which is needed in the [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/) t-measure-probability 85/0 Mathlib/Analysis/Fourier/AddCircleMulti.lean,Mathlib/MeasureTheory/MeasurableSpace/Constructions.lean,Mathlib/MeasureTheory/MeasurableSpace/Embedding.lean 3 16 ['CoolRmal', 'EtienneC30', 'github-actions'] RemyDegenne
assignee:RemyDegenne
0-42606
11 hours ago
0-48313
13 hours ago
38-60813
38 days
36481 justus-springer
author:justus-springer
 feat(CategoryTheory/ObjectProperty/Kernels): Object properties of (co)kernels Introduce two object properties `kernels` and `cokernels` as well as predicates `IsClosedUnderKernels` and `IsClosedUnderCokernels`. --- - [x] depends on: #36479 - [x] depends on: #36480 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-category-theory awaiting-author 156/0 Mathlib.lean,Mathlib/CategoryTheory/ObjectProperty/Kernels.lean 2 8 ['github-actions', 'joelriou', 'justus-springer', 'mathlib-dependent-issues', 'mathlib-merge-conflicts'] nobody
0-42422
11 hours ago
0-58000
16 hours ago
1-44377
1 day
36549 j-loreaux
author:j-loreaux
 refactor: use `IsMulCommutative` ubiquitously for subobjects [#mathlib4 > commutativity of subobjects](https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/commutativity.20of.20subobjects/with/578039488) The algebraic hierarchy is designed so that commutativity (e.g., of multiplication) is bundled into the type class, so that we have, for example `Group` and `CommGroup`, `Ring` and `CommRing`, etc. It is often the case that one may desire to work with a commutative subobject inside an ambient noncommutative type. In cases like `Subgroup.center` or `Subring.center`, the subobject is *always* commutative, and in these cases one should simply imbue those subobjects (coerced to `Type`) with the appropriate `Comm*` instance. However, in other cases, the commutativity of the subobject may be conditional on commutativity of some other object. For example, `Subgroup.closure s` is not always commutative, but it is when `s` is a commutative subset. Likewise, if `S : Subgroup G` is a commutative subgroup, then `S.topologicalClosure` is also commutative. For such scenarios, users should prefer to use the unbundled `IsMulCommutative` typeclass, and to provide theorems such as: ```lean theorem isMulCommutative_closure {G : Type*} [Group G] {k : Set G} (hcomm : ∀ x ∈ k, ∀ y ∈ k, x * y = y * x) : IsMulCommutative (closure k) ``` or even *instances* such as ```lean instance Subgroup.instIsMulCommutative_closure {S G : Type*} [Group G] [SetLike S G] [MulMemClass S G] (s : S) [IsMulCommutative s] : IsMulCommutative (closure (s : Set G)) ``` and ```lean instance Subgroup.isMulCommutative_topologicalClosure [T2Space G] (s : Subgroup G) [IsMulCommutative s] : IsMulCommutative s.topologicalClosure ``` Note that we prefer to name these instances manually because they are occasionally useful as theorems. For example, the proof of the topological closure instance for subgroups above is proved immediately from the one for monoids via: `s.toSubmonoid.isMulCommutative_topologicalClosure`. In practice, we wish to be able to use the library of theorems about (bundled) commutativity for subobjects as well, and so we also provide instances which take as input the unbundled `Group G` and `IsMulCommutative G` and produce the bundled `CommGroup G`. However, to avoid deleterious effects to type class synthesis for bundled commutativity (by forcing Lean to search the entirery of both the bundled and unbundled hierarchies), these instances are only available inside the `IsMulCommutative` scope and are simultaneously given the very low priority `50`. --- - [ ] depends on: #36546 - [ ] depends on: #36547 - [ ] depends on: #36548 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra
label:t-algebra$
 575/133 Mathlib/Algebra/Algebra/NonUnitalSubalgebra.lean,Mathlib/Algebra/Algebra/Subalgebra/Lattice.lean,Mathlib/Algebra/Group/Defs.lean,Mathlib/Algebra/Group/Subgroup/Defs.lean,Mathlib/Algebra/Group/Subgroup/Map.lean,Mathlib/Algebra/Group/Subsemigroup/Defs.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/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/NonUnitalSubsemiring/Basic.lean,Mathlib/Topology/Algebra/Algebra.lean,Mathlib/Topology/Algebra/NonUnitalAlgebra.lean,Mathlib/Topology/Algebra/NonUnitalStarAlgebra.lean,Mathlib/Topology/Algebra/StarSubalgebra.lean 37 3 ['github-actions', 'mathlib-dependent-issues'] nobody
0-42203
11 hours ago
0-42273
11 hours ago
0-46938
13 hours
36405 seewoo5
author:seewoo5
 feat(ModularForms): (normalized) derivative of modular forms --- Derivative of modular forms, stems from [Sphere Packing project](https://github.com/thefundamentaltheor3m/Sphere-Packing-Lean). The major goal is two-fold: prove Ramanujan's identities and also prove that Serre derivative preserves modularity (first uses second). [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-number-theory 174/0 Mathlib.lean,Mathlib/NumberTheory/ModularForms/Derivative.lean 2 27 ['CBirkbeck', 'github-actions', 'mathlib-bors', 'seewoo5', 'tb65536', 'wwylele'] tb65536
assignee:tb65536
0-41966
11 hours ago
0-55417
15 hours ago
3-82929
3 days
35773 joelriou
author:joelriou
 refactor(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. --- - [ ] depends on: #36692 - [ ] depends on: #36688 - [ ] depends on: #36680 - [ ] depends on: #36457 - [ ] depends on: #36470 - [ ] depends on: #36599 - [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 blocked-by-other-PR large-import
label:t-algebra$
 1959/11 Mathlib.lean,Mathlib/Algebra/Category/ModuleCat/ChangeOfRings.lean,Mathlib/Algebra/Category/ModuleCat/Monoidal/Adjunction.lean,Mathlib/Algebra/Category/ModuleCat/Presheaf/ColimitFunctor.lean,Mathlib/Algebra/Category/ModuleCat/Presheaf/ColimitFunctorMonoidal.lean,Mathlib/Algebra/Category/ModuleCat/Presheaf/Monoidal.lean,Mathlib/Algebra/Category/ModuleCat/Presheaf/Point.lean,Mathlib/Algebra/Category/ModuleCat/Presheaf/Pushforward.lean,Mathlib/Algebra/Category/ModuleCat/Presheaf/PushforwardZeroMonoidal.lean,Mathlib/Algebra/Category/ModuleCat/Sheaf.lean,Mathlib/Algebra/Category/ModuleCat/Sheaf/Colimits.lean,Mathlib/Algebra/Category/ModuleCat/Sheaf/Free.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/Filtered/FinallySmall.lean,Mathlib/CategoryTheory/Limits/Preserves/BifunctorCokernel.lean,Mathlib/CategoryTheory/Monoidal/Braided/Transport.lean,Mathlib/CategoryTheory/Monoidal/Functor.lean,Mathlib/CategoryTheory/Monoidal/Limits/Cokernels.lean,Mathlib/CategoryTheory/Monoidal/Preadditive.lean,Mathlib/CategoryTheory/Preadditive/AdditiveFunctor.lean,Mathlib/CategoryTheory/Sites/CoversTop.lean,Mathlib/CategoryTheory/Sites/IsSheafFor.lean 28 4 ['github-actions', 'mathlib-dependent-issues', 'mathlib-merge-conflicts'] nobody
0-41210
11 hours ago
19-44822
19 days ago
0-1
1 second
36101 wwylele
author:wwylele
 feat(RingTheory): lemmas about power of maximal ideal This adds `IsMaximal.mul_mem_pow` that generalizes `Ideal.IsPrime.mul_mem_pow ` from (IsPrime + IsDedekindDomain) to IsMaximal (Except for the trivial bot case, which is why the prime version is kept) Also added a related `Quotient.isUnit_mk_pow_iff_notMem` for determining units in a quotient by power Disclosure of AI usage: this was produced when I chat with LLM for certain exercise problems, and I identified these small lemmas that can be implemented. Also asked LLM for some hints for idea. Code entirely written by me --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-ring-theory maintainer-merge 52/6 Mathlib/RingTheory/DedekindDomain/Ideal/Lemmas.lean,Mathlib/RingTheory/Ideal/Operations.lean,Mathlib/RingTheory/Ideal/Quotient/Nilpotent.lean 3 9 ['chrisflav', 'copilot-pull-request-reviewer', 'github-actions', 'wwylele'] chrisflav
assignee:chrisflav
0-41172
11 hours ago
2-33889
2 days ago
12-77040
12 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 32/18 Mathlib/RingTheory/Ideal/Cotangent.lean,Mathlib/RingTheory/Ideal/Quotient/Operations.lean 2 20 ['chrisflav', 'erdOne', 'github-actions', 'mathlib-merge-conflicts', 'sun123zxy'] chrisflav
assignee:chrisflav
0-41104
11 hours ago
1-49368
1 day ago
16-56262
16 days
36724 JovanGerb
author:JovanGerb
 chore: reduce transitive imports of `Lean` By reducing the amount that each file imports, we can reduce build times by a bit. It's a shame that the new `shake` doesn't seem to do this kind of refactor for us. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) 29/36 Mathlib/Algebra/Group/Defs.lean,Mathlib/Algebra/HierarchyDesign.lean,Mathlib/Algebra/Ring/ULift.lean,Mathlib/Control/Lawful.lean,Mathlib/Data/FunLike/Basic.lean,Mathlib/Data/Nat/Init.lean,Mathlib/Data/Prod/Basic.lean,Mathlib/Logic/Basic.lean,Mathlib/Logic/Relation.lean,Mathlib/Order/Hom/Basic.lean,Mathlib/SetTheory/Cardinal/Defs.lean,Mathlib/Tactic/ArithMult.lean,Mathlib/Tactic/Choose.lean,Mathlib/Tactic/CongrM.lean,Mathlib/Tactic/DefEqTransformations.lean,Mathlib/Tactic/Ext.lean,Mathlib/Tactic/FunProp/Types.lean,Mathlib/Tactic/GCongr/Core.lean,Mathlib/Tactic/GRewrite/Core.lean,Mathlib/Tactic/GRewrite/Elab.lean,Mathlib/Tactic/IrreducibleDef.lean,Mathlib/Tactic/Lift.lean,Mathlib/Tactic/Push.lean,Mathlib/Tactic/SetLike.lean,Mathlib/Tactic/Simps/Basic.lean,Mathlib/Tactic/TermCongr.lean,Mathlib/Tactic/Widget/CongrM.lean,Mathlib/Tactic/Zify.lean,MathlibTest/TermCongr.lean 29 3 ['JovanGerb', 'github-actions', 'leanprover-radar'] nobody
0-40692
11 hours ago
0-47431
13 hours ago
0-51225
14 hours
33010 xgenereux
author:xgenereux
 feat: localizations of primes in Dedekind domains are valuation subrings The goal of this PR is the theorem `valuationSubringAtPrime_eq_valuationSubring` which states that the localization at a nonzero prime in a Dedekind domain is precisely the valuation subring of the valuation associated with that same prime. Given a Dedekind domain `R` in its field of fractions `K`, we define `IsDedekindDomain.valuationSubringAtPrime`, which is the localization of `R` at a nonzero prime, viewed as valuation subring of `K`. We show that `valuationSubringAtPrime K v ≤ (valuation K v).valuationSubring` and use maximality to show that they must be equal. Other small note: - added a variant of `intValuation_exists_uniformizer` in terms of `valuation` (instead of intValuation). Co-authored-by: María Inés de Frutos Fernández <[mariaines.dff@gmail.com](mailto:mariaines.dff@gmail.com)> --- - [ ] depends on: #33631 - [ ] depends on: #33634 [![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 109/5 Mathlib/RingTheory/DedekindDomain/AdicValuation.lean,Mathlib/RingTheory/Valuation/ValuationSubring.lean 2 11 ['erdOne', 'github-actions', 'mathlib4-dependent-issues-bot', 'xgenereux'] nobody
0-39714
11 hours ago
87-12161
87 days ago
2-24474
2 days
36644 gdies
author:gdies
 feat(CategoryTheory/Adhesive): slices of adhesive categories are adhesive contributions: - Adhesive (Over B) instance — slices of adhesive categories are adhesive. Found it as Proposition 8(ii) of Adhesive Categories, Lack & Sobociński (2004) while researching for a project. Needed the proof so perhaps others could rely on it too. The proof applies adhesive_of_preserves_and_reflects_isomorphism to Over.forget B, which creates all colimits and creates connected limits. AI tools used. Claude Opus 4.6 + GitHub Copilot scaffolding --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-category-theory new-contributor LLM-generated awaiting-author 43/0 Mathlib.lean,Mathlib/CategoryTheory/Adhesive/Over.lean 2 7 ['erdOne', 'gdies', 'github-actions', 'joelriou'] nobody
0-39705
11 hours ago
0-50010
13 hours ago
2-3331
2 days
31366 FaffyWaffles
author:FaffyWaffles
 feat(Analysis/SpecialFunctions/StirlingRobbins): Robbins' sharp stepwise bound for stirlingSeq This PR refactors `Stirling.lean` to use Robbin's bound `log (stirlingSeq n) - log (stirlingSeq (n+1)) ≤ 1 / (12 n (n + 1))`. The original PR was by @FaffyWaffles but the PR has now been adopted by @tb65536. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-analysis new-contributor 50/46 Mathlib/Analysis/SpecialFunctions/Stirling.lean 1 18 ['FaffyWaffles', 'github-actions', 'j-loreaux', 'mathlib4-merge-conflict-bot', 'tb65536'] nobody
0-39287
10 hours ago
0-39487
10 hours ago
5-8764
5 days
35977 jessealama
author:jessealama
 feat(Algebra/Homology): add dimension lemmas for homological complex differentials Show that `dFrom` and `dTo` in a homological complex vanish when the target or source object is zero, and add `Mathlib.Algebra.Homology.ChainComplex.Dimension` with dimension-related properties for complexes of modules over a division ring over an arbitrary `ComplexShape ι`: zero range from zero objects, finrank equalities between `dFrom`/`dTo` ranges and the underlying differential, inclusion of the range of `dTo` in the kernel of `dFrom`, and a finrank equality for adjacent differentials in ℤ-indexed chain complexes. Spun off from #29713. t-algebra awaiting-author
label:t-algebra$
 103/0 Mathlib.lean,Mathlib/Algebra/Homology/ChainComplex/Dimension.lean 2 5 ['github-actions', 'jessealama', 'joelriou', 'mathlib-bors'] joelriou
assignee:joelriou
0-38872
10 hours ago
14-57892
14 days ago
14-57885
14 days
36745 EtienneC30
author:EtienneC30
 feat: a process with independent increments and Gaussian marginals is Gaussian --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) brownian t-measure-probability file-removed large-import 315/7 Archive/Imo/Imo1987Q1.lean,Mathlib.lean,Mathlib/Algebra/BigOperators/Fin.lean,Mathlib/Algebra/BigOperators/Intervals.lean,Mathlib/AlgebraicTopology/DoldKan/Decomposition.lean,Mathlib/Data/Fintype/BigOperators.lean,Mathlib/Probability/Distributions/Gaussian/IsGaussianProcess/Independence.lean,Mathlib/Probability/Independence/BoundedContinuousFunction.lean,Mathlib/Probability/Independence/Process/Basic.lean,Mathlib/Probability/Independence/Process/HasIndepIncrements/Basic.lean,Mathlib/Probability/Independence/Process/HasIndepIncrements/IsGaussianProcess.lean,Mathlib/SetTheory/Ordinal/Arithmetic.lean 12 1 ['github-actions'] nobody
0-37005
10 hours ago
unknown
0-0
0 seconds
36069 Equilibris
author:Equilibris
 feat(Data/PFunctor): Universe generic W Previously `W.ind` was limited to `Prop`. It can for free be changed to `Sort w` forall w. --- When changing adding `elab_as_elim` it broke the usages in `Fix.lean`. I had to change `apply ...`s to use `induction ... using ...` but this a minor change. I added a `simp` lemma to the `w_ind_wMk` as: it is `rfl` and will almost certainly we used at reference site. It might in the future be useful to add `simp` to `wRec_eq` as well. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-data new-contributor 41/31 Mathlib/Data/PFunctor/Multivariate/W.lean,Mathlib/Data/QPF/Multivariate/Constructions/Fix.lean 2 10 ['Equilibris', 'github-actions', 'joneugster'] joneugster
assignee:joneugster
0-36767
10 hours ago
3-59240
3 days ago
9-6470
9 days
25273 YaelDillies
author:YaelDillies
 refactor: 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: #3667592 - [ ] depends on: #36746 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) WIP t-algebra large-import
label:t-algebra$
 1684/1525 Mathlib/Algebra/FreeAlgebra/Cardinality.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/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/Eval/Coeff.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/LinearAlgebra/Finsupp/VectorSpace.lean,Mathlib/LinearAlgebra/FreeAlgebra.lean,Mathlib/LinearAlgebra/LinearIndependent/Lemmas.lean,Mathlib/LinearAlgebra/Matrix/Charpoly/Univ.lean,Mathlib/NumberTheory/Height/MvPolynomial.lean,Mathlib/RepresentationTheory/Action.lean,Mathlib/RepresentationTheory/Basic.lean,Mathlib/RepresentationTheory/Equiv.lean,Mathlib/RepresentationTheory/Rep.lean,Mathlib/RingTheory/Coalgebra/MonoidAlgebra.lean,Mathlib/RingTheory/Extension/Generators.lean,Mathlib/RingTheory/FinitePresentation.lean,Mathlib/RingTheory/FiniteType.lean,Mathlib/RingTheory/Finiteness/Finsupp.lean,Mathlib/RingTheory/HopfAlgebra/MonoidAlgebra.lean,Mathlib/RingTheory/MvPolynomial/Basic.lean,Mathlib/RingTheory/MvPolynomial/EulerIdentity.lean,Mathlib/RingTheory/MvPolynomial/FreeCommRing.lean,Mathlib/RingTheory/MvPolynomial/Homogeneous.lean,Mathlib/RingTheory/MvPolynomial/IrreducibleQuadratic.lean,Mathlib/RingTheory/MvPolynomial/Symmetric/Defs.lean,Mathlib/RingTheory/MvPolynomial/WeightedHomogeneous.lean,Mathlib/RingTheory/Polynomial/Basic.lean,Mathlib/RingTheory/Polynomial/Opposites.lean,Mathlib/RingTheory/TensorProduct/MonoidAlgebra.lean,Mathlib/RingTheory/TensorProduct/MvPolynomial.lean 69 90 ['JovanGerb', 'YaelDillies', 'alreadydone', 'eric-wieser', 'fpvandoorn', 'github-actions', 'leanprover-community-bot-assistant', 'mathlib-dependent-issues', 'mathlib-merge-conflicts', 'mathlib4-merge-conflict-bot'] nobody
0-36173
10 hours ago
255-69757
255 days ago
36-61320
36 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. t-combinatorics new-contributor awaiting-author large-import 193/167 Mathlib/Combinatorics/SimpleGraph/Acyclic.lean,Mathlib/Combinatorics/SimpleGraph/Basic.lean,Mathlib/Combinatorics/SimpleGraph/Connectivity/Connected.lean,Mathlib/Combinatorics/SimpleGraph/Connectivity/EdgeConnectivity.lean,Mathlib/Combinatorics/SimpleGraph/Connectivity/Subgraph.lean,Mathlib/Combinatorics/SimpleGraph/Connectivity/WalkDecomp.lean,Mathlib/Combinatorics/SimpleGraph/DeleteEdges.lean,Mathlib/Combinatorics/SimpleGraph/Hamiltonian.lean,Mathlib/Combinatorics/SimpleGraph/Matching.lean,Mathlib/Combinatorics/SimpleGraph/Operations.lean,Mathlib/Combinatorics/SimpleGraph/Paths.lean,Mathlib/Combinatorics/SimpleGraph/Walks/Operations.lean 12 17 ['MJ141592', 'SnirBroshi', 'YaelDillies', 'b-mehta', 'github-actions', 'mathlib4-merge-conflict-bot'] nobody
0-35959
9 hours ago
98-39184
98 days ago
0-27068
7 hours
36746 YaelDillies
author:YaelDillies
 refactor(Algebra/MonoidAlgebra): use explicit conversion functions to/from `Finsupp` Introduce `coeff : R[M] → M →₀ R` and `ofCoeff : (M →₀ R) → R[M]` as a way to convert explicitly between `MonoidAlgebra` and `Finsupp` and thus avoiding defeq abuse. This is a fast and loose preliminary version of #25273. In particular, some proofs break and need to be fixed with either `set_option backward.isDefEq.respectTransparency false`, or by unfolding `MvPolynomial`. The situation will improve again once #25273 is in and further `MvPolynomial` is turned into an `abbrev`. All the changes beyond introducing `coeff`/`ofCoeff` and using them in the basic API are motivated by fixing downstream breakage. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) WIP large-import 1310/1242 Mathlib/Algebra/Lie/Loop.lean,Mathlib/Algebra/MonoidAlgebra/Basic.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/Support.lean,Mathlib/Algebra/MvPolynomial/Basic.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/Rename.lean,Mathlib/Algebra/MvPolynomial/Supported.lean,Mathlib/Algebra/Polynomial/Basic.lean,Mathlib/Algebra/Polynomial/Coeff.lean,Mathlib/Algebra/Polynomial/Degree/Defs.lean,Mathlib/Algebra/Polynomial/Derivative.lean,Mathlib/Algebra/Polynomial/FieldDivision.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/SumIteratedDerivative.lean,Mathlib/Algebra/Polynomial/UnitTrinomial.lean,Mathlib/Analysis/Fourier/BoundedContinuousFunctionChar.lean,Mathlib/Data/Finsupp/Basic.lean,Mathlib/FieldTheory/Finite/Polynomial.lean,Mathlib/LinearAlgebra/LinearIndependent/Lemmas.lean,Mathlib/LinearAlgebra/Matrix/Charpoly/Univ.lean,Mathlib/LinearAlgebra/SymmetricAlgebra/Basis.lean,Mathlib/NumberTheory/BernoulliPolynomials.lean,Mathlib/NumberTheory/Height/MvPolynomial.lean,Mathlib/RingTheory/Extension/Generators.lean,Mathlib/RingTheory/FinitePresentation.lean,Mathlib/RingTheory/FiniteType.lean,Mathlib/RingTheory/HopfAlgebra/MonoidAlgebra.lean,Mathlib/RingTheory/MvPolynomial/Basic.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/Expand.lean,Mathlib/RingTheory/MvPowerSeries/Trunc.lean,Mathlib/RingTheory/Polynomial/Basic.lean,Mathlib/RingTheory/Polynomial/IsIntegral.lean,Mathlib/RingTheory/TensorProduct/MonoidAlgebra.lean,Mathlib/RingTheory/TensorProduct/MvPolynomial.lean 61 2 ['eric-wieser', 'github-actions'] nobody
0-34558
9 hours ago
0-36360
10 hours ago
0-2
2 seconds
33634 xgenereux
author:xgenereux
 feat(ValuationSubring): eq_self_or_eq_top_of_le Using `primeSpectrumEquiv` we get the the corresponding results of `IsLocalRing.primeSpectrum_eq_of_KrullDimLEOne`(see #33607) for valuation subrings. Co-authored-by: María Inés de Frutos Fernández <[mariaines.dff@gmail.com](mailto:mariaines.dff@gmail.com)> --- - [ ] depends on: #33631 - [ ] depends on: #33612 - [ ] depends on: #33609 - [ ] depends on: #33607 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) large-import t-algebra
label:t-algebra$
 23/0 Mathlib/RingTheory/Valuation/ValuationSubring.lean 1 6 ['alreadydone', 'github-actions', 'mathlib-dependent-issues', 'mathlib4-merge-conflict-bot', 'plp127', 'xgenereux'] nobody
0-34346
9 hours ago
0-34421
9 hours ago
0-34475
9 hours
31809 ADedecker
author:ADedecker
 feat: differentiation of test function as a CLM Co-authored-by: @luigi-massacci --- - [x] depends on: #31806 - [x] depends on: #30240 - [x] depends on: #36445 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-analysis 52/2 Mathlib/Analysis/Distribution/TestFunction.lean 1 7 ['github-actions', 'mathlib-dependent-issues', 'mathlib-merge-conflicts', 'mathlib4-merge-conflict-bot'] nobody
0-34132
9 hours ago
0-36750
10 hours ago
0-36759
10 hours
32250 ADedecker
author:ADedecker
 feat: integration against a locally integrable function as a CLM on test functions Aka viewing a locally integrable function as a distribution Co-authored-by: @luigi-massacci --- - [x] depends on: #36445 - [x] depends on: #36460 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-analysis large-import 241/0 Mathlib/Analysis/Distribution/ContDiffMapSupportedIn.lean,Mathlib/Analysis/Distribution/TestFunction.lean 2 4 ['github-actions', 'mathlib-dependent-issues', 'mathlib4-merge-conflict-bot'] nobody
0-33791
9 hours ago
0-36761
10 hours ago
0-36716
10 hours
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/) 75/74 Mathlib/Algebra/Algebra/Hom.lean,Mathlib/Algebra/Category/ModuleCat/Ulift.lean,Mathlib/Algebra/FiniteSupport/Basic.lean,Mathlib/Algebra/FiniteSupport/Defs.lean,Mathlib/Algebra/Group/Action/End.lean,Mathlib/Algebra/Group/Hom/Defs.lean,Mathlib/Algebra/Homology/BifunctorShift.lean,Mathlib/Algebra/Homology/CochainComplexPlus.lean,Mathlib/Algebra/Homology/DerivedCategory/Ext/Map.lean,Mathlib/Algebra/Homology/Embedding/ExtendHomotopy.lean,Mathlib/Algebra/Homology/HomologicalBicomplex.lean,Mathlib/Algebra/Homology/HomotopyCategory/HomComplexSingle.lean,Mathlib/Algebra/Homology/HomotopyCategory/Pretriangulated.lean,Mathlib/Algebra/Homology/HomotopyCategory/SingleFunctors.lean,Mathlib/Algebra/Homology/ModelCategory/Lifting.lean,Mathlib/Algebra/Lie/CartanExists.lean,Mathlib/Algebra/Lie/Derivation/Basic.lean,Mathlib/Algebra/Lie/EngelSubalgebra.lean,Mathlib/Algebra/Lie/SemiDirect.lean,Mathlib/Algebra/Module/NatInt.lean,Mathlib/Algebra/NonAssoc/LieAdmissible/Defs.lean,Mathlib/Algebra/Order/Antidiag/Prod.lean,Mathlib/Algebra/Order/Group/Synonym.lean,Mathlib/Algebra/Order/Hom/Monoid.lean,Mathlib/Algebra/Order/SuccPred/TypeTags.lean,Mathlib/Algebra/Polynomial/PartialFractions.lean,Mathlib/Algebra/Ring/CentroidHom.lean,Mathlib/AlgebraicGeometry/Morphisms/QuasiCompact.lean,Mathlib/AlgebraicGeometry/Sites/SheafQuasiCompact.lean,Mathlib/AlgebraicTopology/DoldKan/Homotopies.lean,Mathlib/Analysis/CStarAlgebra/ContinuousFunctionalCalculus/Projection.lean,Mathlib/Analysis/Calculus/InverseFunctionTheorem/ApproximatesLinearOn.lean,Mathlib/Analysis/Calculus/Rademacher.lean,Mathlib/Analysis/Normed/Module/Alternating/Uncurry/Fin.lean,Mathlib/Analysis/Normed/Module/ContinuousInverse.lean,Mathlib/Analysis/Polynomial/Norm.lean,Mathlib/Analysis/RCLike/Extend.lean,Mathlib/Analysis/SpecialFunctions/Bernstein.lean,Mathlib/CategoryTheory/Adhesive/Subobject.lean,Mathlib/CategoryTheory/Monoidal/Cartesian/GrpLimits.lean,Mathlib/CategoryTheory/RegularCategory/Basic.lean,Mathlib/CategoryTheory/Sites/SheafOfTypes.lean,Mathlib/CategoryTheory/Triangulated/TStructure/TruncLEGT.lean,Mathlib/Combinatorics/Colex.lean,Mathlib/Combinatorics/Matroid/Map.lean,Mathlib/Combinatorics/SetFamily/FourFunctions.lean,Mathlib/Combinatorics/SimpleGraph/Acyclic.lean,Mathlib/Combinatorics/SimpleGraph/Extremal/TuranDensity.lean,Mathlib/FieldTheory/IntermediateField/Adjoin/Algebra.lean,Mathlib/FieldTheory/SeparablyGenerated.lean 50 6 ['euprunin', 'github-actions', 'mathlib-bors', 'mathlib-merge-conflicts'] nobody
0-33567
9 hours ago
5-23357
5 days ago
7-55245
7 days
35539 xgenereux
author:xgenereux
 feat(DedekindDomain/Factorization): add `iInf` version of `finprod_heightOneSpectrum_factorization` This PR adds an `iInf` version of `finprod_heightOneSpectrum_factorization`. This requires two lemmas: - `prod_eq_iInf_of_coprime` - An `iInf` version of `mul_eq_inf_of_coprime`. - `HeightOneSpectrum.pow_sup_pow_eq_top` - Bundled up version of `Ideal.IsMaximal.coprime_of_ne` + `Ideal.pow_sup_pow_eq_top` for `HeightOneSpectrum`. ------ I noticed that these lemmas simplify a bit the work on the Chinese remainder theorem done in the file. The last commit of this PR is this simplification. I can remove it if this is not relevant. 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 delegated 90/48 Mathlib/Algebra/Module/DedekindDomain.lean,Mathlib/RingTheory/DedekindDomain/Factorization.lean,Mathlib/RingTheory/DedekindDomain/Ideal/Lemmas.lean,Mathlib/RingTheory/Ideal/Operations.lean,Mathlib/RingTheory/Ideal/Quotient/Operations.lean 5 32 ['Ruben-VandeVelde', 'chrisflav', 'erdOne', 'github-actions', 'mathlib-bors', 'riccardobrasca', 'xgenereux'] chrisflav
assignee:chrisflav
0-33238
9 hours ago
2-61441
2 days ago
21-12805
21 days
34375 jvanwinden
author:jvanwinden
 feat(MeasureTheory/Function/AEEqOfLIntegral): introduce lemmas for rewriting a.e. inequalities Introduce the following lemmas: - ae_le_const_iff_forall_gt_imp_ae_lt, - ae_const_le_iff_forall_lt_imp_ae_gt, - ae_le_const_iff_forall_gt_imp_ae_le, - ae_const_le_iff_forall_lt_imp_ae_ge, which can be used get an epsilon of room in a.e. inequalities, with the epsilon being outside the a.e. quantifier. The 'le/ge' variants require a dense ordering. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor t-measure-probability awaiting-author 24/0 Mathlib/MeasureTheory/Function/AEEqOfLIntegral.lean 1 10 ['EtienneC30', 'github-actions', 'jvanwinden', 'urkud'] kex-y
assignee:kex-y
0-32167
8 hours ago
10-50146
10 days ago
41-4810
41 days
36097 matthewjasper
author:matthewjasper
 chore: make pseudoparents of algebraic substructures reducible Make functions that take an algebraic substructure and return a sibling class reducible, this matches actual parents and resolves some usage of `set_option backward.isDefEq.respectTransparency false`. For example it ensures that the field instance on `IntermediateField` has a compatible `Semiring` instance to the one from it extending a `Subalgebra`. Also remove @[simp] from `adjoin_toSubsemiring`, since it prevents other simp lemmas on `adjoin` from applying. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra maintainer-merge
label:t-algebra$
 21/16 Mathlib/Algebra/Algebra/NonUnitalSubalgebra.lean,Mathlib/Algebra/Algebra/Subalgebra/Basic.lean,Mathlib/Algebra/Algebra/Subalgebra/Lattice.lean,Mathlib/Algebra/Field/Subfield/Defs.lean,Mathlib/Algebra/Ring/Subring/Defs.lean,Mathlib/Algebra/Ring/Subsemiring/Defs.lean,Mathlib/Algebra/Star/NonUnitalSubalgebra.lean,Mathlib/Algebra/Star/Subalgebra.lean,Mathlib/FieldTheory/IntermediateField/Basic.lean,Mathlib/RingTheory/NonUnitalSubring/Defs.lean,Mathlib/RingTheory/TensorProduct/Basic.lean 11 3 ['dagurtomas', 'github-actions'] dagurtomas
assignee:dagurtomas
0-31636
8 hours ago
0-29561
8 hours ago
0-5503
1 hour
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 580/0 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/PresentedGroup.lean 10 26 ['eric-wieser', 'github-actions', 'kim-em', 'mathlib-dependent-issues', 'mathlib-merge-conflicts', 'robin-carlier', 'tb65536', 'themathqueen'] tb65536
assignee:tb65536
0-29862
8 hours ago
32-73114
32 days ago
13-11162
13 days
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 178/0 Mathlib.lean,Mathlib/Analysis/Normed/Order/Antidiag.lean,Mathlib/RingTheory/MvPowerSeries/Restricted.lean 3 38 ['WilliamCoram', 'erdOne', 'github-actions', 'jcommelin', 'mathlib-merge-conflicts'] alreadydone
assignee:alreadydone
0-28956
8 hours ago
6-1722
6 days ago
10-75328
10 days
36262 CBirkbeck
author:CBirkbeck
 feat(NumberTheory/ModularForms): modular discriminant as a cusp form ## Summary This PR constructs the modular discriminant `Δ(z) = η(z)^24` and proves it is a cusp form of weight 12 and level 1. The dominated convergence for infinite products is proved by reducing to the additive Tannery theorem via the formal expansion `∏ (1 + f i) = ∑ₛ ∏ᵢ∈ₛ f i`. ### New files - `Mathlib/Analysis/Normed/Ring/InfiniteProd.lean`: Dominated convergence theorem for infinite products of the form `∏' k, (1 + f n k)` in a complete normed commutative ring, proved via Tannery's theorem. - `Mathlib/NumberTheory/ModularForms/Discriminant.lean`: The modular discriminant `Δ`, its q-expansion, non-vanishing, and slash-invariance under the generators of SL(2,ℤ). ### New declarations in existing files - `Real.prod_one_add_le_exp_sum` in `Mathlib/Analysis/Complex/Exponential.lean`: `∏ᵢ∈ₛ (1 + f i) ≤ exp(∑ᵢ∈ₛ f i)` for nonneg `f`. - `summable_finset_prod_of_summable_nonneg` in `Mathlib/Analysis/SpecialFunctions/Log/Summable.lean`: if `f` is nonneg and summable, then `∑ₛ ∏ᵢ∈ₛ f i` is summable. - `summable_finset_prod_of_summable_norm` in `Mathlib/Analysis/SpecialFunctions/Log/Summable.lean`: normed ring version of the above. ### Key results - `ModularForm.discriminantCuspForm`: `Δ` bundled as a `CuspForm (Γ(1)) 12`. - `tendsto_tprod_one_add_of_dominated_convergence`: Dominated convergence for infinite products. ### Note - `ModularForms/Delta.lean` has been renamed to `ModularForms/Discriminant.lean` to be more in line with the literature. --- file-removed 185/25 Mathlib.lean,Mathlib/Analysis/Complex/Exponential.lean,Mathlib/Analysis/Normed/Ring/InfiniteProd.lean,Mathlib/Analysis/SpecialFunctions/Log/Summable.lean,Mathlib/NumberTheory/ModularForms/Cusps.lean,Mathlib/NumberTheory/ModularForms/Discriminant.lean,Mathlib/NumberTheory/ModularForms/Identities.lean,Mathlib/NumberTheory/ModularForms/LevelOne.lean 8 19 ['CBirkbeck', 'github-actions', 'loefflerd', 'mathlib-merge-conflicts', 'wwylele'] loefflerd
assignee:loefflerd
0-28323
7 hours ago
1-74830
1 day ago
0-1085
18 minutes
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 awaiting-author t-group-theory LLM-generated merge-conflict 86/0 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/PresentedGroup.lean 6 9 ['eric-wieser', 'github-actions', 'mathlib-merge-conflicts', 'themathqueen'] thorimur
assignee:thorimur
0-28319
7 hours ago
26-9804
26 days ago
6-12224
6 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 203/0 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/PresentedGroup.lean 8 7 ['eric-wieser', 'github-actions', 'joneugster', 'kim-em', 'mathlib-dependent-issues', 'mathlib-merge-conflicts'] nobody
0-28318
7 hours ago
32-21280
32 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 418/0 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/PresentedGroup.lean 9 5 ['github-actions', 'joneugster', 'mathlib-dependent-issues', 'mathlib-merge-conflicts'] nobody
0-28316
7 hours ago
32-21282
32 days ago
0-624
10 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. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-data merge-conflict 433/475 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/PartENat.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/Deprecated/Estimator.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 82 30 ['JovanGerb', 'SnirBroshi', 'github-actions', 'mathlib-merge-conflicts', 'vihdzp'] vihdzp
assignee:vihdzp
0-28314
7 hours ago
1-11279
1 day ago
9-85561
9 days
35821 SnirBroshi
author:SnirBroshi
 feat(Order/ConditionallyCompleteLattice): `sInf s ≤ sSup t` for `(s ∩ t).Nonempty` --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-order awaiting-author merge-conflict 21/4 Mathlib/Order/Bounds/Basic.lean,Mathlib/Order/CompleteLattice/Basic.lean,Mathlib/Order/ConditionallyCompleteLattice/Basic.lean 3 5 ['Komyyy', 'SnirBroshi', 'github-actions', 'mathlib-merge-conflicts'] Komyyy
assignee:Komyyy
0-28313
7 hours ago
4-17793
4 days ago
16-7482
16 days
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
0-28310
7 hours ago
unknown
0-0
0 seconds
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 merge-conflict 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/Multivariate.lean,Mathlib/Probability/Distributions/Gaussian/Real.lean,Mathlib/Probability/HasLaw.lean,Mathlib/Probability/Moments/Basic.lean 9 3 ['github-actions', 'mathlib-dependent-issues', 'mathlib-merge-conflicts'] nobody
0-28308
7 hours ago
3-37190
3 days ago
0-1
1 second
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. --- [![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/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/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 2 ['github-actions', 'mathlib-merge-conflicts'] nobody
0-28307
7 hours ago
0-55188
15 hours ago
0-55186
15 hours
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 4 ['github-actions', 'jcommelin', 'mathlib-bors', 'mathlib-dependent-issues', 'mathlib-merge-conflicts'] nobody
0-28306
7 hours ago
2-69872
2 days ago
0-45
45 seconds
36666 mathlib-nolints
author:mathlib-nolints
 chore: remove declarations deprecated between 2021-03-15 and 2025-09-15 I am happy to remove some deprecated declarations for you! Please check if there are any remaining stray comments or other issues before merging. --- [workflow run for this PR](https://github.com/leanprover-community/mathlib4/actions/runs/23103692966) new-contributor merge-conflict 0/1571 Mathlib/Algebra/BigOperators/Group/Finset/Basic.lean,Mathlib/Algebra/Category/CommAlgCat/Basic.lean,Mathlib/Algebra/Field/Basic.lean,Mathlib/Algebra/Group/Action/Faithful.lean,Mathlib/Algebra/Group/End.lean,Mathlib/Algebra/Group/Submonoid/Operations.lean,Mathlib/Algebra/Group/Units/Defs.lean,Mathlib/Algebra/Group/WithOne/Basic.lean,Mathlib/Algebra/GroupWithZero/Range.lean,Mathlib/Algebra/Lie/Subalgebra.lean,Mathlib/Algebra/Lie/Submodule.lean,Mathlib/Algebra/Module/LocalizedModule/Basic.lean,Mathlib/Algebra/Module/Submodule/Lattice.lean,Mathlib/Algebra/Module/Submodule/Range.lean,Mathlib/Algebra/Order/BigOperators/Group/Finset.lean,Mathlib/Algebra/Order/Group/Cone.lean,Mathlib/Algebra/Order/Group/Unbundled/Int.lean,Mathlib/Algebra/Order/Module/PositiveLinearMap.lean,Mathlib/Algebra/Order/Ring/Cone.lean,Mathlib/Algebra/Order/Star/Basic.lean,Mathlib/Algebra/Quaternion.lean,Mathlib/Algebra/Ring/GeomSum.lean,Mathlib/Algebra/Star/StarAlgHom.lean,Mathlib/Algebra/Vertex/HVertexOperator.lean,Mathlib/Algebra/Vertex/VertexOperator.lean,Mathlib/AlgebraicGeometry/ProjectiveSpectrum/Basic.lean,Mathlib/AlgebraicGeometry/Sites/Pretopology.lean,Mathlib/AlgebraicTopology/SimplexCategory/Augmented/Basic.lean,Mathlib/AlgebraicTopology/TopologicalSimplex.lean,Mathlib/Analysis/AbsoluteValue/Equivalence.lean,Mathlib/Analysis/Analytic/CPolynomial.lean,Mathlib/Analysis/Calculus/Implicit.lean,Mathlib/Analysis/Calculus/InverseFunctionTheorem/ApproximatesLinearOn.lean,Mathlib/Analysis/Calculus/InverseFunctionTheorem/ContDiff.lean,Mathlib/Analysis/Calculus/InverseFunctionTheorem/FDeriv.lean,Mathlib/Analysis/InnerProductSpace/Positive.lean,Mathlib/Analysis/Matrix/PosDef.lean,Mathlib/Analysis/Normed/Field/Lemmas.lean,Mathlib/Analysis/Normed/Group/Hom.lean,Mathlib/Analysis/Normed/Module/WeakDual.lean,Mathlib/Analysis/Normed/Operator/Basic.lean,Mathlib/Analysis/Normed/Operator/Mul.lean,Mathlib/Analysis/Quaternion.lean,Mathlib/Analysis/SpecialFunctions/Pow/Asymptotics.lean,Mathlib/CategoryTheory/Action.lean,Mathlib/CategoryTheory/Groupoid/Grpd/Basic.lean,Mathlib/CategoryTheory/Limits/Presheaf.lean,Mathlib/CategoryTheory/Limits/Types/Colimits.lean,Mathlib/CategoryTheory/Localization/Bifunctor.lean,Mathlib/CategoryTheory/Localization/Predicate.lean,Mathlib/CategoryTheory/Localization/Trifunctor.lean,Mathlib/CategoryTheory/Monoidal/Bimon_.lean,Mathlib/CategoryTheory/Monoidal/Cartesian/CommGrp_.lean,Mathlib/CategoryTheory/Monoidal/Cartesian/CommMon_.lean,Mathlib/CategoryTheory/Monoidal/Cartesian/Comon_.lean,Mathlib/CategoryTheory/Monoidal/Cartesian/Grp_.lean,Mathlib/CategoryTheory/Monoidal/Cartesian/Mod_.lean,Mathlib/CategoryTheory/Monoidal/Cartesian/Mon_.lean,Mathlib/CategoryTheory/Monoidal/CommGrp_.lean,Mathlib/CategoryTheory/Monoidal/CommMon_.lean,Mathlib/CategoryTheory/Monoidal/Comon_.lean,Mathlib/CategoryTheory/Monoidal/Grp_.lean,Mathlib/CategoryTheory/Monoidal/Hopf_.lean,Mathlib/CategoryTheory/Monoidal/Mod_.lean,Mathlib/CategoryTheory/Monoidal/Mon_.lean,Mathlib/CategoryTheory/Sites/Coverage.lean,Mathlib/CategoryTheory/Sites/MorphismProperty.lean,Mathlib/CategoryTheory/Sites/SheafOfTypes.lean,Mathlib/CategoryTheory/Sites/Sieves.lean,Mathlib/Combinatorics/Colex.lean,Mathlib/Combinatorics/SimpleGraph/Coloring.lean,Mathlib/Combinatorics/SimpleGraph/Paths.lean,Mathlib/Combinatorics/SimpleGraph/Subgraph.lean,Mathlib/Combinatorics/SimpleGraph/Walks/Operations.lean,Mathlib/Computability/Primrec/Basic.lean,Mathlib/Data/Finset/Filter.lean,Mathlib/Data/Finset/Range.lean,Mathlib/Data/Nat/Init.lean,Mathlib/Data/Nat/PartENat.lean,Mathlib/Data/Rat/Defs.lean,Mathlib/Data/Rat/Floor.lean,Mathlib/Data/Real/Basic.lean,Mathlib/Data/Set/Function.lean,Mathlib/Data/Set/Image.lean,Mathlib/Data/Subtype.lean,Mathlib/Data/ZMod/Basic.lean,Mathlib/Deprecated/Estimator.lean,Mathlib/Deprecated/MLList/BestFirst.lean,Mathlib/Geometry/Manifold/Algebra/LieGroup.lean,Mathlib/Geometry/Manifold/ChartedSpace.lean,Mathlib/Geometry/Manifold/Diffeomorph.lean,Mathlib/Geometry/Manifold/HasGroupoid.lean,Mathlib/Geometry/Manifold/IsManifold/ExtChartAt.lean,Mathlib/Geometry/Manifold/LocalDiffeomorph.lean,Mathlib/Geometry/Manifold/MFDeriv/UniqueDifferential.lean,Mathlib/Geometry/Manifold/VectorBundle/Basic.lean,Mathlib/Geometry/Manifold/VectorBundle/FiberwiseLinear.lean,Mathlib/GroupTheory/Finiteness.lean,Mathlib/GroupTheory/Perm/Basic.lean,Mathlib/GroupTheory/Perm/Cycle/Type.lean 173 4 ['Parcly-Taxel', 'github-actions', 'mathlib-merge-conflicts'] nobody
0-28305
7 hours ago
2-32
1 day ago
0-3227
53 minutes
35664 Rida-Hamadani
author:Rida-Hamadani
 feat(SimpleGraph): the adjacency matrix of empty and complete graphs --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-combinatorics 11/0 Mathlib/Combinatorics/SimpleGraph/AdjMatrix.lean 1 5 ['IvanRenison', 'Rida-Hamadani', 'YaelDillies', 'github-actions'] YaelDillies
assignee:YaelDillies
0-27852
7 hours ago
0-81771
22 hours ago
21-26238
21 days
36747 euprunin
author:euprunin
 chore: remove some `set_option linter.flexible false` Trace profiling results (differences <30 ms considered measurement noise): * `Subring.exists_list_of_mem_closure`: 446 ms before, 120 ms after 🎉 * `AlgebraicGeometry.nonempty_isColimit_binaryCofanMk_of_isCompl`: 275 ms before, 232 ms after 🎉 * `Complex.sameRay_iff`: 214 ms before, 143 ms after 🎉 * `MeasureTheory.lintegral_prod_lintegral_pow_le`: 1367 ms before, 810 ms after 🎉 * `Finset.doubling_lt_golden_ratio`: 3624 ms before, 2680 ms after 🎉 * `EuclideanGeometry.sin_angle_div_dist_eq_sin_angle_div_dist`: 128 ms before, 54 ms after 🎉 * `ContMDiff.inl`: unchanged 🎉 * `HasMFDerivWithinAt.prodMap`: 1052 ms before, 944 ms after 🎉 * `cmp_swap`: unchanged 🎉 --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) 8/26 Mathlib/AlgebraicGeometry/Limits.lean,Mathlib/Analysis/Complex/Arg.lean,Mathlib/Analysis/FunctionalSpaces/SobolevInequality.lean,Mathlib/Combinatorics/Additive/VerySmallDoubling.lean,Mathlib/Geometry/Euclidean/Triangle.lean,Mathlib/Geometry/Manifold/ContMDiff/Constructions.lean,Mathlib/Geometry/Manifold/MFDeriv/SpecificFunctions.lean,Mathlib/Order/Compare.lean 8 5 ['github-actions', 'vlad902'] nobody
0-27477
7 hours ago
0-33211
9 hours ago
0-33166
9 hours
29550 Raph-DG
author:Raph-DG
 feat(RingTheory): Order of vanishing in a discrete valuation ring In this PR we develop some API for working with the order of vanishing in a discrete valuation ring. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) file-removed t-ring-theory large-import 561/5 Mathlib.lean,Mathlib/Algebra/Algebra/Tower.lean,Mathlib/Algebra/GroupWithZero/Action/Basic.lean,Mathlib/Algebra/Order/Group/MinMax.lean,Mathlib/Algebra/Order/GroupWithZero/Canonical.lean,Mathlib/RingTheory/DiscreteValuationRing/Basic.lean,Mathlib/RingTheory/DiscreteValuationRing/TFAE.lean,Mathlib/RingTheory/OrderOfVanishing/Basic.lean,Mathlib/RingTheory/OrderOfVanishing/Noetherian.lean,Mathlib/RingTheory/SimpleModule/Basic.lean,Mathlib/RingTheory/Valuation/Discrete/Basic.lean 11 46 ['Raph-DG', 'erdOne', 'github-actions', 'mathlib-merge-conflicts', 'mathlib4-merge-conflict-bot'] erdOne
assignee:erdOne
0-26522
7 hours ago
10-71602
10 days ago
50-69223
50 days
36752 Ljon4ik4
author:Ljon4ik4
 feat: Alternative definition of a tensor product for an algebra Let $A$ be an $R$-algebra and $M$ and $N$ $A$-modules. Then the tensor product $M\otimes_A N$ can be constructed as a quotient of $M\otimes_R N$ by the submodule generated by elements of the shape $am\otimes n - m\otimes an$. This PR realizes this construction and shows that it is isomorphic to the general definition of $M\otimes_A N$. As one consequence we obtain a description of the kernel of `mapOfCompatibleSMul'` as a span of elements of the shape $am\otimes n - m\otimes an$. * I wasn't sure where exactly to put it: Currently it is in `Algebra.TensorProduct`, which I think could be a place for more results of tensor products over algebras in the long term, but maybe some file inside `Mathlib.LinearAlgebra.TensorProduct` could also make sense. * I am not sure if it is very nice to mention 'variable (R A M N)' everywhere, they could also be defined as explicit in the top of the document, and explicitly omitted where unneeded. * The `omit [IsScalarTower R A N] in` was suggested by the linter, I am not sure I understand why * Since the relations contain negation, this procedure only works if some of the ingredients admit negation, one could imagine alternative versions (e.g. when $N$ admits negations and not $M$) but this seemed the most intuitive one. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra new-contributor
label:t-algebra$
 147/0 Mathlib.lean,Mathlib/Algebra/Algebra/TensorProduct.lean 2 2 ['github-actions'] nobody
0-26504
7 hours ago
0-26573
7 hours ago
0-27461
7 hours
33935 mckoen
author:mckoen
 feat(CategoryTheory/Monoidal/Arrow): define monoidal structure on arrow category defines a monoidal category structure on the arrow category of a cartesian closed category. --- - [x] depends on: #33974 - [x] depends on: #34887 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-category-theory maintainer-merge 522/0 Mathlib.lean,Mathlib/CategoryTheory/Monoidal/Arrow.lean,Mathlib/CategoryTheory/Monoidal/Limits/Shapes/Pullback.lean 3 24 ['dagurtomas', 'github-actions', 'joelriou', 'mathlib-dependent-issues', 'mckoen'] joelriou
assignee:joelriou
0-26361
7 hours ago
3-66792
3 days ago
12-38890
12 days
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 180/0 Mathlib/CategoryTheory/Abelian/TorsionTheory/Basic.lean 1 4 ['farmanb', 'github-actions', 'joelriou'] nobody
0-26330
7 hours ago
unknown
0-0
0 seconds
36345 Brian-Nugent
author:Brian-Nugent
 feat(AlgebraicGeometry): Vanishing for Affine Schemes Draft --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor large-import t-algebraic-geometry t-category-theory merge-conflict 1141/2 Mathlib.lean,Mathlib/Algebra/Category/Grp/ForgetCorepresentable.lean,Mathlib/Algebra/Homology/ShortComplex/Exact.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/AffineVanishing.lean,Mathlib/Topology/Sheaves/Flasque.lean,Mathlib/Topology/Sheaves/LocallySurjective.lean,Mathlib/Topology/Sheaves/Presheaf.lean,Mathlib/Topology/Sheaves/Restrict.lean,Mathlib/Topology/Sheaves/Sheaf.lean,Mathlib/Topology/Sheaves/SheafCondition/UniqueGluing.lean,Mathlib/Topology/Sheaves/ZeroOutside.lean 15 3 ['github-actions', 'mathlib-merge-conflicts'] nobody
0-25805
7 hours ago
unknown
0-0
0 seconds
36730 jano-wol
author:jano-wol
 feat: forward map from Lie ideals to invariant root submodules Forward map from Lie ideals to invariant root submodules --- This PR begins the development of the order isomorphism between Lie ideals of a Killing Lie algebra and invariant root submodules of the associated root system. We define `lieIdealRootSet I`, the set of roots whose root space is contained in a Lie ideal `I`, prove it is closed under Weyl reflections, and construct the forward map `lieIdealToInvtRootSubmodule` sending `I` to the span of these roots. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra LLM-generated
label:t-algebra$
 118/0 Mathlib.lean,Mathlib/Algebra/Lie/Weights/IdealOrderIso.lean,Mathlib/Algebra/Lie/Weights/Killing.lean 3 2 ['github-actions', 'mathlib-bors'] nobody
0-25781
7 hours ago
0-25802
7 hours ago
0-25791
7 hours
36660 zw810-ctrl
author:zw810-ctrl
 feat(Topology/Maps): add Bourbaki strict maps For #36269. add a lemma lemma IsQuotientMap.isOpenMap_of_injective {f : X → Y} (hq : IsQuotientMap f) (hinj : Function.Injective f) : IsOpenMap f which may be put at Mathlib.Topology.Maps.Basic --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-topology new-contributor awaiting-author 55/0 Mathlib.lean,Mathlib/Topology/Maps/Strict/Basic.lean 2 14 ['ADedecker', 'github-actions', 'plp127', 'zw810-ctrl'] nobody
0-25333
7 hours ago
2-8859
2 days ago
0-683
11 minutes
36356 gasparattila
author:gasparattila
 chore(Order/Hom/BoundedLattice): use `to_dual` --- - [x] depends on: #36354 - [ ] depends on: #36609 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-order blocked-by-other-PR 76/292 Mathlib/Order/Hom/Basic.lean,Mathlib/Order/Hom/BoundedLattice.lean,Mathlib/Order/Hom/Lattice.lean 3 6 ['JovanGerb', 'github-actions', 'mathlib-dependent-issues', 'mathlib-merge-conflicts'] nobody
0-24805
6 hours ago
2-44419
2 days ago
0-10659
2 hours
33348 AntoineChambert-Loir
author:AntoineChambert-Loir
 feat(LinearAlgebra/Transvection): characterization of transvections among dilatransvections * `LinearEquiv.fixedReduce`. Pass a linear equivalence to the quotient by a fixed subspace. * Characterize transvections among dilatransvections by the fact that their reduction is the identity. --- - [x] depends on: #33347 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra
label:t-algebra$
 356/9 Mathlib.lean,Mathlib/Algebra/Module/Submodule/Map.lean,Mathlib/Algebra/Module/Submodule/Pointwise.lean,Mathlib/LinearAlgebra/FiniteDimensional/Lemmas.lean,Mathlib/LinearAlgebra/FixedSubmodule.lean,Mathlib/LinearAlgebra/Transvection.lean,Mathlib/RingTheory/Regular/RegularSequence.lean 7 34 ['AntoineChambert-Loir', 'dagurtomas', 'github-actions', 'mathlib-merge-conflicts', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot', 'ocfnash'] ocfnash
assignee:ocfnash
0-24715
6 hours ago
0-43664
12 hours ago
38-1090
38 days
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 109/1 Mathlib/Tactic/Linter/FlexibleLinter.lean,Mathlib/Tactic/TacticAnalysis/Declarations.lean,MathlibTest/TacticAnalysis.lean 3 5 ['SnirBroshi', 'chenson2018', 'github-actions'] nobody
0-24359
6 hours ago
unknown
0-0
0 seconds
36731 michael-novak-math
author:michael-novak-math
 feat: add a few basic definitions and classic results about differential geometry of plane curves We define the curvature function, normal vector function and the Frénet moving frame and we prove the Frénet equations for plane curves and the fundamental theorem of plane curves. new-contributor large-import t-differential-geometry t-analysis 802/0 Mathlib.lean,Mathlib/Analysis/Calculus/Deriv/Prod.lean,Mathlib/Geometry/PlaneCurves.lean,Mathlib/MeasureTheory/Integral/IntervalIntegral/FundThmCalculus.lean,docs/references.bib 5 8 ['github-actions', 'grunweg', 'michael-novak-math'] nobody
0-23852
6 hours ago
0-23550
6 hours ago
0-3221
53 minutes
36694 matthewjasper
author:matthewjasper
 chore: reduce use of `RestrictScalars` This type is often being abused as way to locally define instances. Change these to use non-instance definitions. This also avoids defeq abuse in the uses. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) 62/35 Mathlib/Algebra/Algebra/RestrictScalars.lean,Mathlib/Algebra/Category/ModuleCat/Algebra.lean,Mathlib/Analysis/Calculus/MeanValue.lean,Mathlib/Analysis/InnerProductSpace/Continuous.lean,Mathlib/Analysis/InnerProductSpace/Symmetric.lean,Mathlib/Analysis/LocallyConvex/SeparatingDual.lean,Mathlib/Analysis/Normed/Module/Basic.lean,Mathlib/Analysis/Normed/Module/HahnBanach.lean,Mathlib/Analysis/RCLike/Lemmas.lean,Mathlib/Analysis/SpecialFunctions/ContinuousFunctionalCalculus/ExpLog/Basic.lean,Mathlib/Data/Complex/Basic.lean,Mathlib/FieldTheory/PurelyInseparable/Basic.lean,Mathlib/FieldTheory/SeparableDegree.lean,Mathlib/LinearAlgebra/Complex/Module.lean,Mathlib/RingTheory/IsTensorProduct.lean,Mathlib/RingTheory/LocalRing/Quotient.lean,Mathlib/RingTheory/TensorProduct/Maps.lean,MathlibTest/instance_diamonds.lean 18 15 ['eric-wieser', 'github-actions', 'kim-em', 'mathlib-bors'] nobody
0-23839
6 hours ago
1-30016
1 day ago
1-30349
1 day
35756 mariainesdff
author:mariainesdff
 feat(Data/Nat/Choose/Multinomial): add lemmas Co-authored-by: @AntoineChambert-Loir. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-combinatorics t-data maintainer-merge 25/0 Mathlib/Data/Nat/Choose/Multinomial.lean 1 5 ['github-actions', 'joneugster'] joneugster
assignee:joneugster
0-23575
6 hours ago
0-53503
14 hours ago
18-69637
18 days
35878 Parcly-Taxel
author:Parcly-Taxel
 chore: use `induction` for `Quotient.induction` invocations Found through the regex `(refine|apply|exact).*Quotient.induction`. Includes the multiple-argument variants. tech debt maintainer-merge 100/101 Mathlib/Algebra/GroupWithZero/Associated.lean,Mathlib/Algebra/Lie/Quotient.lean,Mathlib/Algebra/Module/ZLattice/Basic.lean,Mathlib/AlgebraicTopology/SimplexCategory/GeneratorsRelations/Basic.lean,Mathlib/CategoryTheory/Abelian/Pseudoelements.lean,Mathlib/CategoryTheory/Monoidal/Free/Basic.lean,Mathlib/CategoryTheory/Subobject/Basic.lean,Mathlib/Combinatorics/Tiling/Tile.lean,Mathlib/Computability/TuringMachine/Tape.lean,Mathlib/Data/Multiset/Functor.lean,Mathlib/Data/Multiset/Sym.lean,Mathlib/Data/Setoid/Basic.lean,Mathlib/FieldTheory/Fixed.lean,Mathlib/GroupTheory/Perm/Cycle/Concrete.lean,Mathlib/LinearAlgebra/Alternating/DomCoprod.lean,Mathlib/LinearAlgebra/Quotient/Pi.lean,Mathlib/Logic/Equiv/Basic.lean,Mathlib/NumberTheory/Padics/PadicNumbers.lean,Mathlib/NumberTheory/RamificationInertia/Basic.lean,Mathlib/Order/Category/PartOrd.lean,Mathlib/Order/RelIso/Basic.lean,Mathlib/RingTheory/AdicCompletion/Algebra.lean,Mathlib/RingTheory/AdicCompletion/Basic.lean,Mathlib/RingTheory/AdicCompletion/Functoriality.lean,Mathlib/RingTheory/Ideal/Norm/AbsNorm.lean,Mathlib/SetTheory/Cardinal/Cofinality.lean,Mathlib/SetTheory/Ordinal/Arithmetic.lean,Mathlib/Topology/Algebra/InfiniteSum/Module.lean 28 11 ['github-actions', 'joneugster', 'mathlib-merge-conflicts'] joneugster
assignee:joneugster
0-23441
6 hours ago
1-12719
1 day ago
14-64849
14 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
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 3 ['github-actions', 'mathlib-dependent-issues', 'mathlib4-merge-conflict-bot'] nobody
0-23051
6 hours ago
9-10025
9 days ago
9-9989
9 days
36751 vlad902
author:vlad902
 chore(Data): remove some `set_option linter.flexible false` --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) tech debt t-data 28/56 Mathlib/Data/EReal/Operations.lean,Mathlib/Data/Nat/Digits/Defs.lean,Mathlib/Data/Nat/Digits/Lemmas.lean,Mathlib/Data/Num/Lemmas.lean,Mathlib/Data/Rat/Cast/CharZero.lean,Mathlib/Data/Set/Prod.lean,Mathlib/Data/WSeq/Basic.lean 7 3 ['github-actions', 'grunweg', 'plp127'] nobody
0-22938
6 hours ago
0-27991
7 hours ago
0-28781
7 hours
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 26/0 Mathlib/Analysis/InnerProductSpace/Projection/FiniteDimensional.lean 1 5 ['Scarlett-le', 'github-actions', 'j-loreaux'] sgouezel
assignee:sgouezel
0-22931
6 hours ago
6-28415
6 days ago
8-57062
8 days
36462 wwylele
author:wwylele
 feat(Geometry/Euclidean): integration formula for μHE A step towards #34826. --- The location of `MeasureTheory.volume_eq_of_finrank_eq_one` feels a bit random. I'd like to put it in some early files, but it uses measure preserving of isometry in Mathlib/MeasureTheory/Measure/Haar/InnerProductSpace.lean, which is why it ended up there [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-measure-probability t-euclidean-geometry 138/5 Mathlib/Geometry/Euclidean/Volume/Measure.lean,Mathlib/MeasureTheory/MeasurableSpace/Embedding.lean,Mathlib/MeasureTheory/Measure/Haar/InnerProductSpace.lean 3 15 ['copilot-pull-request-reviewer', 'eric-wieser', 'github-actions', 'wwylele'] nobody
0-22580
6 hours ago
6-24035
6 days ago
6-23990
6 days
36466 wwylele
author:wwylele
 feat(Geometry/Euclidean): misc lemma about μHE Some building blocks for #34826 --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-euclidean-geometry t-measure-probability maintainer-merge 61/0 Mathlib/Geometry/Euclidean/Volume/Measure.lean 1 4 ['copilot-pull-request-reviewer', 'github-actions', 'jsm28'] jsm28
assignee:jsm28
0-22510
6 hours ago
6-10392
6 days ago
6-10347
6 days
35412 joneugster
author:joneugster
 feat(Tactic/Linter): add unicode linter for unicode variant-selectors This PR continues the work from #17129. Original PR: https://github.com/leanprover-community/mathlib4/pull/17129 t-linter delegated 279/56 Mathlib/GroupTheory/GroupExtension/Defs.lean,Mathlib/Lean/MessageData/Trace.lean,Mathlib/Tactic/DefEqAbuse.lean,Mathlib/Tactic/Hint.lean,Mathlib/Tactic/Linter/TextBased.lean,Mathlib/Tactic/Linter/TextBased/UnicodeLinter.lean,Mathlib/Tactic/Widget/Calc.lean,Mathlib/Tactic/Widget/CongrM.lean,Mathlib/Tactic/Widget/Conv.lean,Mathlib/Tactic/Widget/GCongr.lean,MathlibTest/LintStyle.lean,MathlibTest/hint.lean,MathlibTest/hintAll.lean 13 11 ['github-actions', 'grunweg', 'joneugster', 'mathlib-bors', 'mathlib-merge-conflicts'] grunweg
assignee:grunweg
0-22447
6 hours ago
11-3740
11 days ago
8-29145
8 days
34676 joneugster
author:joneugster
 chore(Algebra/CharP/MixedCharZero): cleanup file and use module system - mark all internal declarations in the file as `private` - remove `@[exposed]` from the `public section` - reduce `public` imports - use `theorem` and `lemma` to highlight main results. This got lost in the port but was present in [mathlib3](https://github.com/leanprover-community/mathlib3/blob/master/src/algebra/char_p/mixed_char_zero.lean). - fix some wording and drop a random `example` which shouldn't be there --- I've used this file to better understand the module system and its future implications for mathlib. The file is IMO ideal since it's an old toy example of mine which is a leaf that isn't imported in mathlib anywhere else (yet). [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra
label:t-algebra$
 31/25 Mathlib/Algebra/CharP/MixedCharZero.lean 1 13 ['github-actions', 'joneugster', 'mathlib-merge-conflicts', 'vihdzp'] eric-wieser
assignee:eric-wieser
0-22280
6 hours ago
0-22303
6 hours ago
27-69361
27 days
34079 joneugster
author:joneugster
 feat(scripts/autolabel): add dependencies for alg. geometry and diff. geometry Add topic label dependencies: - "t-algebraic-geometry" -> "t-ring-theory" - "t-differential-geometry" -> "t-analysis", "t-topology" This means the bot will only apply the former if both would be applicable. --- - part of: #34078 - [x] depends on: #34066 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) CI 4/2 scripts/autolabel.lean 1 13 ['github-actions', 'grunweg', 'joneugster', 'mathlib-dependent-issues', 'mathlib-merge-conflicts'] nobody
0-22122
6 hours ago
0-22145
6 hours ago
8-5265
8 days
36756 Jun2M
author:Jun2M
 feat(Combinatorics/HasDart/Walks): add general walks for `HasDart` 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 * `HasDart.Walk G u v`: The type of walks from vertex `u` to vertex `v` in a graph-like structure `G` * `HasDart.Walk.length`: The number of edges in a walk * `HasDart.Walk.support`: The list of vertices visited by a walk * `HasDart.Walk.darts`: The list of `prodDart`s (oriented edges) in a walk --- - [ ] 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 590/0 Mathlib.lean,Mathlib/Combinatorics/Digraph/HasDart.lean,Mathlib/Combinatorics/HasDart/Basic.lean,Mathlib/Combinatorics/HasDart/Walks/Basic.lean,Mathlib/Combinatorics/SimpleGraph/HasDart.lean 5 2 ['github-actions', 'mathlib-dependent-issues'] nobody
0-21615
6 hours ago
0-22843
6 hours ago
0-547
9 minutes
36715 vihdzp
author:vihdzp
 feat: `IsCofinal s` implies `IsCofinal (f '' s)` --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) 26/15 Mathlib/Order/Cofinal.lean,Mathlib/SetTheory/Cardinal/Cofinality.lean 2 1 ['github-actions'] nobody
0-20015
5 hours ago
1-4006
1 day ago
1-3961
1 day
36743 Jun2M
author:Jun2M
 feat(Combinatorics/HasDart): introduce `HasDart` typeclass for graph-like structures Per discussion at ([#graph theory > HasAdj](https://leanprover.zulipchat.com/#narrow/channel/252551-graph-theory/topic/HasAdj/with/575843445)), This PR introduces the `HasDart` 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. This PR generalises #35776 to also unify `Graph`. ### Main definitions * `HasDart α Gr`: A typeclass parameterized by a vertex type `α` and a graph type `Gr` (with `α` as an `outParam`). * `HasDart.verts`: The set of vertices of the graph. * `HasDart.dart`: The type of darts (oriented edges) between two vertices. This returns `Sort u'` to accommodate both `Prop`-valued edges (like in `SimpleGraph`) and data-carrying edges (like in multigraphs). * `HasDart.Adj`: The adjacency relation, defined by default as `Nonempty (dart G u v)`. * `prodDart G` : A form of dart that does not have its end points in its type. * Instance of `HasDart α (SimpleGraph α)` with `dart G u v := G.Adj u v` * Instance of `HasDart α (Digraph α)` with `dart G u v := G.Adj u v` --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-combinatorics 206/0 Mathlib.lean,Mathlib/Combinatorics/Digraph/HasDart.lean,Mathlib/Combinatorics/HasDart/Basic.lean,Mathlib/Combinatorics/SimpleGraph/HasDart.lean 4 1 ['github-actions'] nobody
0-19940
5 hours ago
0-24748
6 hours ago
0-40014
11 hours
35647 BryceT233
author:BryceT233
 feat(RingTheory/Ideal/Quotient): add a canonical inclusion map This is the second PR split from the larger PR https://github.com/leanprover-community/mathlib4/pull/34936 to make the review process easier. It introduces `Submodule.powSMulQuotInclusion`, which is the canonical inclusion from `I ^ a • N ⧸ I ^ b • (I ^ a • N)` to `M ⧸ I ^ c • N` where `c = b + a`, and provides auxiliary lemmas for it --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-ring-theory new-contributor 43/0 Mathlib/RingTheory/Ideal/Quotient/PowTransition.lean 1 16 ['BryceT233', 'chrisflav', 'erdOne', 'github-actions', 'wwylele'] chrisflav
assignee:chrisflav
0-19695
5 hours ago
0-41270
11 hours ago
21-30377
21 days
36735 yhx-12243
author:yhx-12243
 feat(Algebra/Ring/Subring): drop associativity condition for `Subring`s cf. Item 4 in #7987. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-ring-theory new-contributor 144/63 Counterexamples/DimensionPolynomial.lean,Mathlib/Algebra/Ring/InjSurj.lean,Mathlib/Algebra/Ring/Subring/Basic.lean,Mathlib/Algebra/Ring/Subring/Defs.lean,Mathlib/Algebra/Ring/Subring/MulOpposite.lean,Mathlib/Algebra/Ring/Subsemiring/Defs.lean,Mathlib/NumberTheory/NumberField/Basic.lean,Mathlib/NumberTheory/NumberField/CanonicalEmbedding/Basic.lean,Mathlib/RingTheory/Algebraic/Integral.lean,Mathlib/RingTheory/FinitePresentation.lean,Mathlib/RingTheory/NonUnitalSubring/Defs.lean,Mathlib/RingTheory/NonUnitalSubsemiring/Defs.lean 12 3 ['github-actions', 'mathlib-merge-conflicts'] nobody
0-19507
5 hours ago
0-19062
5 hours ago
0-6979
1 hour
33944 artie2000
author:artie2000
 feat(Algebra/Ring): formally real rings * Define formally real rings * Prove basic inductive facts about them Co-authored-by: Violeta Hernández Palacios --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra
label:t-algebra$
 158/0 Mathlib.lean,Mathlib/Algebra/Ring/IsFormallyReal.lean 2 31 ['artie2000', 'github-actions', 'mariainesdff', 'vihdzp'] mariainesdff
assignee:mariainesdff
0-19497
5 hours ago
0-24816
6 hours ago
37-45260
37 days
36754 mcdoll
author:mcdoll
 feat(Analysis/Distribution): Sobolev distributions This is the first part of the definition of the Sobolev space. Here we only define the predicate `MemSobolev`, the subsequent PR will define the space of all Sobolev functions with the correct topology. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-analysis WIP 335/0 Mathlib/Analysis/Distribution/Sobolev.lean 1 1 ['github-actions'] nobody
0-19166
5 hours ago
0-23837
6 hours ago
0-394
6 minutes
28248 YaelDillies
author:YaelDillies
 feat: binomial random variables Define the binomial distribution and compute the expectation, variance, conditional variance of a binomial random variable. From MiscYD --- - [x] depends on: #31908 - [x] depends on: #31910 - [x] depends on: #31942 - [x] depends on: #31947 - [x] depends on: #34367 - [x] depends on: #34370 - [x] depends on: #34374 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-measure-probability 252/0 Mathlib.lean,Mathlib/MeasureTheory/Integral/Bochner/Set.lean,Mathlib/Probability/Distributions/Binomial.lean,Mathlib/Probability/Distributions/TwoValued.lean 4 67 ['DavidLedvinka', 'RemyDegenne', 'YaelDillies', 'b-mehta', 'eric-wieser', 'github-actions', 'kex-y', 'mathlib-dependent-issues', 'mathlib-merge-conflicts', 'mathlib4-merge-conflict-bot', 'pfaffelh', 'themathqueen'] EtienneC30
assignee:EtienneC30
0-18756
5 hours ago
0-53127
14 hours ago
55-46733
55 days
33780 ooovi
author:ooovi
 feat(Geometry/Convex/Cone): lineality space of pointed cones Define the lineality space `PointedCone.lineal` as the submodule `C ⊓ -C`. Prove that it is the largest submodule of the cone, which is sometimes used as an alternative definition. Co-authored-by: Martin Winter --- dependency of #33664 - [x] depends on #33761 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-convex-geometry maintainer-merge 36/1 Mathlib/Geometry/Convex/Cone/Pointed.lean 1 24 ['YaelDillies', 'artie2000', 'eric-wieser', 'github-actions', 'martinwintermath', 'mathlib4-merge-conflict-bot', 'ooovi', 'vihdzp'] YaelDillies
assignee:YaelDillies
0-18753
5 hours ago
3-37650
3 days ago
30-36320
30 days
33895 jessealama
author:jessealama
 feat(Computability/Primrec): add list_take, list_drop, list_modify, and list_set This PR shows that several list operations from Lean core are primitive recursive: - `list_drop`: [`List.drop`](https://github.com/leanprover/lean4/blob/master/src/Init/Data/List/TakeDrop.lean), via iterating `List.tail` using `nat_iterate` - `list_take`: [`List.take`](https://github.com/leanprover/lean4/blob/master/src/Init/Data/List/TakeDrop.lean), via `list_drop` on the reversed list - `list_modifyHead'`: [`List.modifyHead`](https://github.com/leanprover/lean4/blob/master/src/Init/Data/List/Nat/Modify.lean) with external data - `list_modify'`: [`List.modify`](https://github.com/leanprover/lean4/blob/master/src/Init/Data/List/Nat/Modify.lean) with external data - `list_modify`: [`List.modify`](https://github.com/leanprover/lean4/blob/master/src/Init/Data/List/Nat/Modify.lean) - `list_set`: [`List.set`](https://github.com/leanprover/lean4/blob/master/src/Init/Prelude.lean) The primed versions (`list_modify'`, `list_modifyHead'`) take a function `g : β → α → α` that depends on external data of type `β`. This generalization enables deriving the other operations: - `list_modify` specializes `list_modify'` with `β = Unit` - `list_set` uses `list_modify'` via `List.set_eq_modify` Also moves `list_length` earlier in the file (before `list_drop` and `list_take`, which depend on it). new-contributor t-computability 47/4 Mathlib/Computability/Primrec/List.lean 1 1 ['github-actions'] Komyyy
assignee:Komyyy
0-18752
5 hours ago
60-77999
60 days ago
61-14902
61 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
label:t-algebra$
 164/4 Mathlib.lean,Mathlib/NumberTheory/RamificationInertia/Valuation.lean,Mathlib/RingTheory/DedekindDomain/AdicValuation.lean,Mathlib/RingTheory/Valuation/Discrete/RankOne.lean,Mathlib/RingTheory/Valuation/Extension.lean 5 4 ['github-actions', 'mathlib-dependent-issues', 'mathlib-merge-conflicts'] dagurtomas
assignee:dagurtomas
0-18751
5 hours ago
4-26273
4 days ago
6-65312
6 days
34632 mitchell-horner
author:mitchell-horner
 feat(Combinatorics/SimpleGraph): add `BipartiteDoubleCover` `bipartiteDoubleCover G` has two vertices `inl v` and `inr v` for each vertex `v` in `G` such that `inl v` (`inr v`) is adjacent to `inr w` (`inl w`) iff `v` is adjacent to `w` in `G`. --- 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 87/0 Mathlib/Combinatorics/SimpleGraph/Bipartite.lean 1 10 ['github-actions', 'mitchell-horner', 'vihdzp', 'vlad902'] YaelDillies
assignee:YaelDillies
0-18750
5 hours ago
24-2623
24 days ago
45-12998
45 days
35017 robo7179
author:robo7179
 feat(Combinatorics/SimpleGraph/Acyclic): add every nontrivial tree has atleast two leaves Added two theorems to prove that every non trivial tree has atleast two leaves (one in Finite the other in Acyclic). --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-combinatorics new-contributor 75/0 Mathlib/Combinatorics/SimpleGraph/Acyclic.lean,Mathlib/Combinatorics/SimpleGraph/Finite.lean 2 24 ['IvanRenison', 'SnirBroshi', 'github-actions', 'robo7179'] YaelDillies
assignee:YaelDillies
0-18748
5 hours ago
7-42639
7 days ago
34-38904
34 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 339/3 Mathlib.lean,Mathlib/AlgebraicTopology/SimplicialSet/CoherentIso.lean,Mathlib/AlgebraicTopology/SimplicialSet/CompStruct.lean,Mathlib/AlgebraicTopology/SimplicialSet/StdSimplex.lean,Mathlib/CategoryTheory/CodiscreteCategory.lean 5 66 ['arnoudvanderleer', 'github-actions', 'joelriou', 'robin-carlier'] robin-carlier
assignee:robin-carlier
0-18746
5 hours ago
20-73398
20 days ago
2-17522
2 days
35292 Rida-Hamadani
author:Rida-Hamadani
 feat(SimpleGraph): taking twice from a walk equals taking the minimum this is an analogue to `List.take_take`. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-combinatorics 5/0 Mathlib/Combinatorics/SimpleGraph/Walks/Operations.lean 1 2 ['SnirBroshi', 'github-actions', 'vlad902'] YaelDillies
assignee:YaelDillies
0-18745
5 hours ago
30-69433
30 days ago
30-69388
30 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
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 9 ['Rob23oba', 'eric-wieser', 'github-actions', 'joneugster', 'loefflerd'] dagurtomas
assignee:dagurtomas
0-18743
5 hours ago
27-73083
27 days ago
28-22330
28 days
36064 marcelolynch
author:marcelolynch
 ci: Push to the cache using OIDC and federated credentials This migration replaces static SAS-based cache upload auth with GitHub OIDC + Entra app registrations in Azure. Concretely, each workflow run gets a GitHub-issued OIDC token, and Azure AD (Entra) exchanges that token for a short-lived access token for Storage. We do this through app registrations configured with federated credentials, so no client secret or SAS needs to be stored for normal operation. A key design point is identity separation. We use two different app registrations (two app IDs): one for `master` workflows and one for non-master workflows. That lets us enforce different trust and permission boundaries in Azure RBAC, instead of giving one shared credential broad write access to every workflow type. Note that this separation is not implemented by this change: for now, both identities are still contributing to the same cache. On the cache client side (Cache/Requests.lean / Cache/Main.lean), auth selection is robust to empty bearer values, and there is migration-safe fallback behavior: if bearer upload fails with auth errors and SAS is available, it retries with SAS. The workflow also supports fallback to MATHLIB_CACHE_SAS when minting fails. Benefits: - OIDC/federated credentials remove dependency on a static shared upload secret. - Tokens are minted just-in-time and short-lived. - We can enforce least privilege cleanly by using separate app identities for different workflow classes. - Blast radius is reduced: master and non-master workflows can have different RBAC scopes. - We keep operational safety during migration by retaining controlled SAS fallback, but SAS is no longer the primary auth path. CI maintainer-merge 124/34 .github/workflows/bors.yml,.github/workflows/build.yml,.github/workflows/build_fork.yml,.github/workflows/build_template.yml,.github/workflows/ci_dev.yml,Cache/Main.lean,Cache/README.md,Cache/Requests.lean 8 9 ['bryangingechen', 'github-actions', 'joneugster', 'marcelolynch', 'mathlib-merge-conflicts'] jcommelin
assignee:jcommelin
0-18741
5 hours ago
7-30647
7 days ago
8-68401
8 days
36208 EtienneC30
author:EtienneC30
 feat: central limit theorem Prove the central limit theorem in dimension 1. Co-authored-by: @hanwenzhu --- - [ ] depends on: #36178 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-measure-probability 163/3 Mathlib.lean,Mathlib/Analysis/SpecialFunctions/Complex/LogBounds.lean,Mathlib/MeasureTheory/Measure/CharacteristicFunction/TaylorExpansion.lean,Mathlib/Probability/CentralLimitTheorem.lean,Mathlib/Probability/Moments/Variance.lean,docs/100.yaml,docs/1000.yaml 7 3 ['github-actions', 'mathlib-dependent-issues', 'mathlib-merge-conflicts'] kex-y
assignee:kex-y
0-18741
5 hours ago
7-60396
7 days ago
7-60351
7 days
36314 JovanGerb
author:JovanGerb
 feat(gcongr): support `rintro` patterns This PR adds support for `rintro` patterns in the `with` clause of `gcongr`. This makes it consistent with `congr!`. I've only found one case in mathlib where this could actually be used to shorten a proof. I split the gcongr `elab` into a separate `syntax` and `elab_rules`, which makes it easier to deal with the syntax. I noticed that the implementation of `congr!` was unnecessarily converting back and forth between `rintroPat` and `rcasesPat`, so I changed it to simply only use `rintroPat`, and then did the same in `gcongr`. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-meta 41/28 Mathlib/Combinatorics/SimpleGraph/Regularity/Uniform.lean,Mathlib/Tactic/CongrExclamation.lean,Mathlib/Tactic/Convert.lean,Mathlib/Tactic/Core.lean,Mathlib/Tactic/GCongr/Core.lean 5 2 ['dupuisf', 'github-actions'] dwrensha
assignee:dwrensha
0-18740
5 hours ago
9-68187
9 days ago
9-68270
9 days
36318 grunweg
author:grunweg
 feat: delaborators for `MDifferentiable(On)` And make a precise list which elaborators are missing delaborators at the moment. Continuation of #36230. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-differential-geometry t-meta 158/15 Mathlib/Geometry/Manifold/Notation.lean,MathlibTest/DifferentialGeometry/Notation/Delaborators.lean,MathlibTest/DifferentialGeometry/Notation/Sphere.lean 3 1 ['github-actions'] alexjbest
assignee:alexjbest
0-18739
5 hours ago
7-30752
7 days ago
7-31935
7 days
36392 JovanGerb
author:JovanGerb
 chore: deprecate `push_neg` This PR deprecates `push_neg` in favour of `push Not`. The deprecation message includes an example of how to implement `push_neg` as a macro, in case people want to keep using `push_neg`. This PR replaces all uses of `push_neg` with `push Not`, or golfs them away using `!` tactics like `by_contra!`. The doc-string of `push` is updated with some of the information from the `push_neg` doc-string. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-meta 292/287 Archive/Examples/Kuratowski.lean,Archive/Imo/Imo1988Q6.lean,Archive/Imo/Imo2006Q5.lean,Archive/Wiedijk100Theorems/BallotProblem.lean,Archive/Wiedijk100Theorems/FriendshipGraphs.lean,Archive/Wiedijk100Theorems/SumOfPrimeReciprocalsDiverges.lean,Archive/ZagierTwoSquares.lean,Counterexamples/IrrationalPowerOfIrrational.lean,Mathlib/Algebra/BigOperators/Group/Finset/Piecewise.lean,Mathlib/Algebra/BigOperators/GroupWithZero/Finset.lean,Mathlib/Algebra/GCDMonoid/Basic.lean,Mathlib/Algebra/GroupWithZero/Regular.lean,Mathlib/Algebra/Homology/HomologicalComplex.lean,Mathlib/Algebra/MvPolynomial/Basic.lean,Mathlib/Algebra/Order/AbsoluteValue/Basic.lean,Mathlib/Algebra/Order/Antidiag/Nat.lean,Mathlib/Algebra/Order/Archimedean/IndicatorCard.lean,Mathlib/Algebra/Order/Monoid/Defs.lean,Mathlib/Algebra/Order/Rearrangement.lean,Mathlib/Algebra/Polynomial/Div.lean,Mathlib/Algebra/Polynomial/Monic.lean,Mathlib/Algebra/Polynomial/RingDivision.lean,Mathlib/Algebra/Polynomial/Taylor.lean,Mathlib/Algebra/Regular/SMul.lean,Mathlib/Analysis/Analytic/Binomial.lean,Mathlib/Analysis/Analytic/IsolatedZeros.lean,Mathlib/Analysis/Analytic/OfScalars.lean,Mathlib/Analysis/Calculus/Deriv/ZPow.lean,Mathlib/Analysis/Calculus/LagrangeMultipliers.lean,Mathlib/Analysis/Complex/Basic.lean,Mathlib/Analysis/Complex/JensenFormula.lean,Mathlib/Analysis/Complex/ValueDistribution/LogCounting/Asymptotic.lean,Mathlib/Analysis/ConstantSpeed.lean,Mathlib/Analysis/Convex/Integral.lean,Mathlib/Analysis/Convex/Radon.lean,Mathlib/Analysis/Convex/SimplicialComplex/Basic.lean,Mathlib/Analysis/Distribution/ContDiffMapSupportedIn.lean,Mathlib/Analysis/LocallyConvex/Bounded.lean,Mathlib/Analysis/LocallyConvex/SeparatingDual.lean,Mathlib/Analysis/Real/Hyperreal.lean,Mathlib/Analysis/SpecialFunctions/BinaryEntropy.lean,Mathlib/Analysis/SpecialFunctions/Complex/Arg.lean,Mathlib/Analysis/SpecialFunctions/Integrability/LogMeromorphic.lean,Mathlib/Analysis/SpecialFunctions/OrdinaryHypergeometric.lean,Mathlib/Analysis/SpecialFunctions/Trigonometric/Basic.lean,Mathlib/Analysis/SpecificLimits/Normed.lean,Mathlib/Combinatorics/Matroid/Circuit.lean,Mathlib/Combinatorics/SimpleGraph/Clique.lean,Mathlib/Combinatorics/SimpleGraph/CompleteMultipartite.lean,Mathlib/Combinatorics/SimpleGraph/Connectivity/Connected.lean,Mathlib/Combinatorics/SimpleGraph/Diam.lean,Mathlib/Combinatorics/SimpleGraph/Extremal/Basic.lean,Mathlib/Combinatorics/SimpleGraph/Extremal/Turan.lean,Mathlib/Combinatorics/SimpleGraph/Tutte.lean,Mathlib/Combinatorics/Young/YoungDiagram.lean,Mathlib/Computability/ContextFreeGrammar.lean,Mathlib/Data/EReal/Operations.lean,Mathlib/Data/Nat/Factorization/Defs.lean,Mathlib/Data/Nat/Find.lean,Mathlib/Data/Nat/Nth.lean,Mathlib/Data/Nat/Prime/Basic.lean,Mathlib/Data/Nat/Prime/Defs.lean,Mathlib/Data/PEquiv.lean,Mathlib/Data/Set/Basic.lean,Mathlib/Data/Set/Prod.lean,Mathlib/FieldTheory/Extension.lean,Mathlib/FieldTheory/Finite/Basic.lean,Mathlib/FieldTheory/Galois/Infinite.lean,Mathlib/FieldTheory/PrimitiveElement.lean,Mathlib/Geometry/Manifold/IntegralCurve/ExistUnique.lean,Mathlib/Geometry/Manifold/IsManifold/InteriorBoundary.lean,Mathlib/GroupTheory/Exponent.lean,Mathlib/GroupTheory/Perm/Centralizer.lean,Mathlib/GroupTheory/Perm/List.lean,Mathlib/GroupTheory/Perm/Support.lean,Mathlib/GroupTheory/PushoutI.lean,Mathlib/GroupTheory/SpecificGroups/Alternating.lean,Mathlib/LinearAlgebra/Alternating/Basic.lean,Mathlib/LinearAlgebra/Dimension/Localization.lean,Mathlib/LinearAlgebra/Dimension/RankNullity.lean,Mathlib/LinearAlgebra/Dimension/StrongRankCondition.lean,Mathlib/LinearAlgebra/Dual/Lemmas.lean,Mathlib/LinearAlgebra/Eigenspace/Zero.lean,Mathlib/LinearAlgebra/InvariantBasisNumber.lean,Mathlib/LinearAlgebra/LinearIndependent/Defs.lean,Mathlib/LinearAlgebra/LinearIndependent/Lemmas.lean,Mathlib/LinearAlgebra/Matrix/Determinant/Basic.lean,Mathlib/LinearAlgebra/Matrix/ToLinearEquiv.lean,Mathlib/LinearAlgebra/Multilinear/Basic.lean,Mathlib/LinearAlgebra/Multilinear/DFinsupp.lean,Mathlib/LinearAlgebra/Projectivization/Cardinality.lean,Mathlib/LinearAlgebra/RootSystem/Finite/G2.lean,Mathlib/LinearAlgebra/RootSystem/Reduced.lean,Mathlib/LinearAlgebra/SesquilinearForm/Basic.lean,Mathlib/MeasureTheory/Constructions/BorelSpace/Order.lean,Mathlib/MeasureTheory/Function/AEEqOfLIntegral.lean,Mathlib/MeasureTheory/Function/ConditionalExpectation/Basic.lean,Mathlib/MeasureTheory/Function/Egorov.lean,Mathlib/MeasureTheory/Function/LpSeminorm/Indicator.lean,Mathlib/MeasureTheory/Function/SimpleFuncDense.lean 170 1 ['github-actions'] alexjbest
assignee:alexjbest
0-18737
5 hours ago
3-35427
3 days ago
7-9603
7 days
36414 alainchmt
author:alainchmt
 feat(FieldTheory/Finite): irreducible factors of X^q^n - X have degree dividing n Add the theorem that if an irreducible polynomial over a finite field `K` divides `X ^ (Fintype.card K) ^ n - X`, then the degree of the polynomial divides `n`. We also add an auxiliary lemma stating that polynomials of nonzero degree dividing `X ^ (Fintype.card K) - X` have a root in `K`. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra new-contributor
label:t-algebra$
 53/0 Mathlib/FieldTheory/Finite/Extension.lean,Mathlib/FieldTheory/Finite/GaloisField.lean,Mathlib/FieldTheory/IntermediateField/Adjoin/Basic.lean,Mathlib/FieldTheory/Minpoly/Field.lean 4 9 ['alainchmt', 'github-actions', 'tb65536'] dagurtomas
assignee:dagurtomas
0-18736
5 hours ago
5-50036
5 days ago
7-24929
7 days
36425 yuma-mizuno
author:yuma-mizuno
 fix: prevent stack overflow in `monoidal` tactic Fix stack overflow when trying to use the tactic with incomplete expressions. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-category-theory t-meta 48/0 Mathlib/Tactic/CategoryTheory/Bicategory/Datatypes.lean,Mathlib/Tactic/CategoryTheory/Monoidal/Datatypes.lean,MathlibTest/CategoryTheory/Bicategory/Basic.lean,MathlibTest/CategoryTheory/Monoidal/Basic.lean 4 4 ['github-actions', 'robin-carlier', 'yuma-mizuno'] adamtopaz
assignee:adamtopaz
0-18735
5 hours ago
3-64149
3 days ago
3-24795
3 days
36429 yuma-mizuno
author:yuma-mizuno
 feat(CategoryTheory/Bicategory): functor bicategories for lax functors This code is largely adapted from the existing implementation of the functor bicategory of oplax functors. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-category-theory maintainer-merge 614/25 Mathlib.lean,Mathlib/CategoryTheory/Bicategory/FunctorBicategory/Lax.lean,Mathlib/CategoryTheory/Bicategory/FunctorBicategory/Oplax.lean,Mathlib/CategoryTheory/Bicategory/Modification/Lax.lean,Mathlib/CategoryTheory/Bicategory/Modification/Oplax.lean,Mathlib/CategoryTheory/Bicategory/Modification/Pseudo.lean,Mathlib/CategoryTheory/Bicategory/NaturalTransformation/Lax.lean,Mathlib/CategoryTheory/Bicategory/NaturalTransformation/Oplax.lean 8 20 ['github-actions', 'robin-carlier', 'yuma-mizuno'] adamtopaz
assignee:adamtopaz
0-18734
5 hours ago
1-76942
1 day ago
4-51841
4 days
36470 joelriou
author:joelriou
 feat(CategoryTheory/Monoidal): the left adjoint of a lax monoidal functor is oplax monoidal --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-category-theory maintainer-merge 79/0 Mathlib/CategoryTheory/Monoidal/Functor.lean 1 4 ['dagurtomas', 'github-actions'] robin-carlier
assignee:robin-carlier
0-18733
5 hours ago
3-72259
3 days ago
5-63189
5 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 226/1 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 2 ['github-actions', 'mathlib-dependent-issues'] kex-y
assignee:kex-y
0-18732
5 hours ago
5-75503
5 days ago
0-1
1 second
36492 smmercuri
author:smmercuri
 chore(NumberField/FinitePlaces): generalise `RingOfIntegers K` to `R` This PR slightly generalises the domain in `FinitePlaces.lean` from `RingOfIntegers K` to `R` such that `Module.Finite ℤ R` and `Module.Free ℤ R`. This enables these results to be applied equally to `O ℚ` and `ℤ` when `K = ℚ` --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-number-theory 136/104 Mathlib/NumberTheory/NumberField/Completion/FinitePlace.lean,Mathlib/NumberTheory/NumberField/ProductFormula.lean 2 2 ['github-actions', 'mathlib-merge-conflicts'] MichaelStollBayreuth
assignee:MichaelStollBayreuth
0-18731
5 hours ago
1-60621
1 day ago
4-51857
4 days
36524 AntoineChambert-Loir
author:AntoineChambert-Loir
 feat(GroupTheory/SpecificGroups/Alternating/Simple): simplicity of the alternating groups This is the conclusion of the story of the proof of simplicity of the alternating group using the Iwasawa criterion. * `Equiv.Perm.iwasawaStructure_two`: the natural `IwasawaStructure` of `Equiv.Perm α` acting on `Nat.Combination α 2` Its commutative subgroups consist of the permutations with support in a given element of `Nat.Combination α 2`. They are cyclic of order 2. * `alternatingGroup_of_le_of_normal`: If `α` has at least 5 elements, then a nontrivial normal subgroup of `Equiv.Perm α` contains the alternating group. * `alternatingGroup.iwasawaStructure_three`: the natural `IwasawaStructure` of `alternatingGroup α` acting on `Nat.Combination α 3` Its commutative subgroups consist of the permutations with support in a given element of `Nat.Combination α 2`. They are cyclic of order 3. * `alternatingGroup.iwasawaStructure_three`: the natural `IwasawaStructure` of `alternatingGroup α` acting on `Nat.Combination α 4` Its commutative subgroups consist of the permutations of cycleType (2, 2) with support in a given element of `Nat.Combination α 2`. They have order 4 and exponent 2 (`IsKleinFour`). * `alternatingGroup.normal_subgroup_eq_bot_or_eq_top`: If `α` has at least 5 elements, then a nontrivial normal subgroup of `alternatingGroup` is `⊤`. * `alternatingGroup.isSimpleGroup`: If `α` has at least 5 elements, then `alternatingGroup α` is a simple group. --- - [x] depends on: #33082 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-group-theory 270/10 Mathlib.lean,Mathlib/GroupTheory/GroupAction/SubMulAction/Combination.lean,Mathlib/GroupTheory/SpecificGroups/Alternating.lean,Mathlib/GroupTheory/SpecificGroups/Alternating/Centralizer.lean,Mathlib/GroupTheory/SpecificGroups/Alternating/Simple.lean 5 14 ['AntoineChambert-Loir', 'github-actions', 'mathlib-dependent-issues', 'robin-carlier', 'tb65536'] tb65536
assignee:tb65536
0-18730
5 hours ago
0-71899
19 hours ago
1-57662
1 day
36545 yuanyi-350
author:yuanyi-350
 feat(ProbabilityTheory): Add Kolmogorov's inequality ref: https://en.wikipedia.org/wiki/Kolmogorov%27s_inequality --- - [x] depends on: #36542 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-measure-probability large-import 147/0 Mathlib.lean,Mathlib/Probability/CondVar.lean,Mathlib/Probability/Martingale/Kolmogorov.lean,Mathlib/Probability/Martingale/OptionalStopping.lean 4 3 ['CoolRmal', 'github-actions', 'mathlib-dependent-issues'] EtienneC30
assignee:EtienneC30
0-18729
5 hours ago
4-40051
4 days ago
0-1789
29 minutes
36592 Vierkantor
author:Vierkantor
 chore(Tactic): rewrite `introv` tactic docstring This PR rewrites the docstrings for the `introv` tactic, to consistently match the official style guide, to make sure they are complete while not getting too long. In particular, I wanted to clarify exactly what `introv` does and does not introduce, depending on the list of names given to it. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) documentation t-meta 21/19 Mathlib/Tactic/Basic.lean 1 2 ['github-actions'] dwrensha
assignee:dwrensha
0-18728
5 hours ago
3-68128
3 days ago
3-68083
3 days
36599 joelriou
author:joelriou
 feat(Algebra/Category/ModuleCat): the monoidal adjunction between the extension and the restriction of scalars --- Note: there are a few new `erw` in the code, but this is due to issues in the file `Algebra/Category/ModuleCat/ChangeOfRings`. A refactor of this file would be very much welcome, but I am not completely sure how it should be done... [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-category-theory 178/6 Mathlib.lean,Mathlib/Algebra/Category/ModuleCat/ChangeOfRings.lean,Mathlib/Algebra/Category/ModuleCat/Monoidal/Adjunction.lean,Mathlib/CategoryTheory/Monoidal/Braided/Transport.lean,Mathlib/CategoryTheory/Monoidal/Functor.lean 5 1 ['github-actions'] adamtopaz
assignee:adamtopaz
0-18727
5 hours ago
3-42115
3 days ago
3-43140
3 days
36606 harahu
author:harahu
 chore(AlgebraicGeometry): fix markdown list indentation We replace lazy continuation lines in lists with either: - indented lines, to signify that the line is indeed a continuation line; or - a newline, where the continuation line(s) were in fact intended to be disconnected from the list. We do this because lazy continuation is a markdown footgun that one does well to avoid. We also standardize indentation such that continuation lines now line up with the first line of the item they're continuing. This seems to be the solution enforced by markdown formatters, e.g. `mdformat`. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebraic-geometry 19/17 Mathlib/AlgebraicGeometry/Gluing.lean,Mathlib/AlgebraicGeometry/Morphisms/Basic.lean,Mathlib/AlgebraicGeometry/Morphisms/Flat.lean,Mathlib/AlgebraicGeometry/Morphisms/RingHomProperties.lean,Mathlib/AlgebraicGeometry/Properties.lean 5 1 ['github-actions'] alexjbest
assignee:alexjbest
0-18726
5 hours ago
3-47808
3 days ago
3-47763
3 days
36637 Smithl-Lin
author:Smithl-Lin
 feat(InformationTheory): Pinsker's inequality for finite distributions --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-measure-probability new-contributor 507/0 Mathlib.lean,Mathlib/InformationTheory/Pinsker.lean 2 2 ['github-actions'] RemyDegenne
assignee:RemyDegenne
0-18725
5 hours ago
2-61748
2 days ago
2-62263
2 days
36641 Smithl-Lin
author:Smithl-Lin
 feat(Probability/Martingale): Ville's inequality for nonneg supermart… …ingales --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-measure-probability new-contributor 110/0 Mathlib.lean,Mathlib/Probability/Martingale/Ville.lean 2 2 ['github-actions'] EtienneC30
assignee:EtienneC30
0-18724
5 hours ago
2-53095
2 days ago
2-55090
2 days
36679 SnirBroshi
author:SnirBroshi
 chore(Archive/Imo/Imo2019Q4): remove flexible linter exception + spring cleaning --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) IMO easy 5/10 Archive/Imo/Imo2019Q4.lean 1 1 ['github-actions'] jsm28
assignee:jsm28
0-18723
5 hours ago
1-61764
1 day ago
1-61719
1 day
36680 joelriou
author:joelriou
 feat(CategoryTheory/Limits): action of a bifunctor on cokernels Let `c₁` (resp. `c₂`) be a cokernel cofork for a morphism `f₁ : X₁ ⟶ Y₁` in a category `C₁` (resp. `f₂ : X₂ ⟶ Y₂` in `C₂`). Given a bifunctor `F : C₁ ⥤ C₂ ⥤ C`, we construct a cokernel cofork with point `(F.obj c₁.pt).obj c₂.pt` for the obvious morphism `(F.obj X₁).obj Y₂ ⨿ (F.obj Y₁).obj X₂ ⟶ (F.obj Y₁).obj Y₂`, and show that it is a colimit when the cokernel of `f₁` is preserved by `F.obj c₁.pt` and the cokernel of `f₂` is perserved by `F.flip.obj X₁` and `F.flip.obj Y₁`. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-category-theory 103/0 Mathlib.lean,Mathlib/CategoryTheory/Limits/Preserves/BifunctorCokernel.lean 2 1 ['github-actions'] robin-carlier
assignee:robin-carlier
0-18722
5 hours ago
1-60597
1 day ago
1-60603
1 day
36718 EtienneC30
author:EtienneC30
 feat: processes with independent increments Define a predicate stating that a stochastic process has independent increments. Prove an equivalent definition using sequences instead of `Fin`. Prove some basic invariance properties. Co-authored-by: @jvanwinden --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) brownian t-measure-probability file-removed 131/3 Mathlib.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 5 2 ['EtienneC30', 'github-actions'] RemyDegenne
assignee:RemyDegenne
0-18721
5 hours ago
0-79301
22 hours ago
0-79754
22 hours
36736 loefflerd
author:loefflerd
 feat(NumberTheory/Modular): strengthen 2nd Fundamental-Domain Lemma Strengthen the results on the fundamental domain for the modular group, by proving that the interior of the fundamental domain is disjoint from any translate of the fundamental domain. Proof closely follows Serre _A Course in Arithmetic_ (although Serre also proves that S, T generate the modular group at the same time, which we do not do, since this is proved by a different method in `FixedDetMatrices`). --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-number-theory 388/37 Mathlib/Analysis/Complex/UpperHalfPlane/Basic.lean,Mathlib/Analysis/Complex/UpperHalfPlane/MoebiusAction.lean,Mathlib/LinearAlgebra/Matrix/SpecialLinearGroup.lean,Mathlib/NumberTheory/Modular.lean,docs/references.bib 5 1 ['github-actions'] tb65536
assignee:tb65536
0-18720
5 hours ago
0-35529
9 hours ago
0-53234
14 hours
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`. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor t-combinatorics 957/0 Mathlib.lean,Mathlib/Combinatorics/Enumerative/LatinSquare.lean,docs/references.bib 3 5 ['cjrl', 'ghseeli', 'github-actions'] nobody
0-18471
5 hours ago
0-18498
5 hours ago
0-18623
5 hours
36699 vihdzp
author:vihdzp
 feat: generalize various theorems on `Ordinal` to more general typeclasses --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-set-theory large-import 62/40 Mathlib/Algebra/Order/Monoid/Canonical/Defs.lean,Mathlib/Algebra/Order/SuccPred.lean,Mathlib/NumberTheory/FrobeniusNumber.lean,Mathlib/SetTheory/Cardinal/Cofinality.lean,Mathlib/SetTheory/Ordinal/Arithmetic.lean,Mathlib/SetTheory/Ordinal/Basic.lean,Mathlib/SetTheory/Ordinal/Exponential.lean,Mathlib/SetTheory/Ordinal/FixedPoint.lean,Mathlib/SetTheory/Ordinal/Notation.lean,Mathlib/SetTheory/Ordinal/Principal.lean,MathlibTest/LibrarySearch/basic.lean 11 4 ['github-actions', 'leanprover-radar', 'mathlib-merge-conflicts', 'vihdzp'] nobody
0-18098
5 hours ago
0-18164
5 hours ago
1-8706
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 --- - [x] depends on: #33249 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-combinatorics 110/1 Mathlib/Combinatorics/SimpleGraph/Connectivity/WalkDecomp.lean,Mathlib/Combinatorics/SimpleGraph/Paths.lean,Mathlib/Combinatorics/SimpleGraph/Walks/Operations.lean,Mathlib/Data/List/Basic.lean,Mathlib/Data/List/Nodup.lean 5 17 ['Rida-Hamadani', 'github-actions', 'mathlib-dependent-issues', 'mathlib4-merge-conflict-bot', 'vlad902'] nobody
0-18051
5 hours ago
0-18112
5 hours ago
11-75584
11 days
34466 Komyyy
author:Komyyy
 perf: modulize tests (N/N) --- Privately imports are intentional. - [x] Await the release of leanprover/lean4#12198 - [x] depends on: #34970 - [x] depends on: #35288 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) CI 395/57 MathlibTest/AssertImported.lean,MathlibTest/BinaryRec.lean,MathlibTest/Bound/attribute.lean,MathlibTest/Bound/bound.lean,MathlibTest/CalcQuestionMark.lean,MathlibTest/CategoryTheory/Bicategory/Normalize.lean,MathlibTest/CategoryTheory/Elementwise.lean,MathlibTest/CategoryTheory/Monoidal/Normalize.lean,MathlibTest/CategoryTheory/PrettyPrinting.lean,MathlibTest/Clean.lean,MathlibTest/ComputeDegree.lean,MathlibTest/DFinsuppMultiLinear.lean,MathlibTest/DeriveFintype.lean,MathlibTest/ExistsI.lean,MathlibTest/FBinop.lean,MathlibTest/FunLike.lean,MathlibTest/GalNotation.lean,MathlibTest/Group.lean,MathlibTest/Have.lean,MathlibTest/Inhabit.lean,MathlibTest/LibrarySuggestions/sineQuaNon.lean,MathlibTest/LongFile.lean,MathlibTest/Nat/log.lean,MathlibTest/Qify.lean,MathlibTest/Real.lean,MathlibTest/RefinedDiscrTree.lean,MathlibTest/Replace.lean,MathlibTest/Rify.lean,MathlibTest/Split.lean,MathlibTest/Tauto.lean,MathlibTest/TautoSet.lean,MathlibTest/Use.lean,MathlibTest/Zify.lean,MathlibTest/abel.lean,MathlibTest/borelize.lean,MathlibTest/casesm.lean,MathlibTest/choose.lean,MathlibTest/fail_if_no_progress.lean,MathlibTest/fast_instance.lean,MathlibTest/grind/field.lean,MathlibTest/grind/grobner.lean,MathlibTest/grind/linarith.lean,MathlibTest/grind/lint.lean,MathlibTest/grind/pairwise_disjoint.lean,MathlibTest/grind/set.lean,MathlibTest/grind/trig.lean,MathlibTest/hintAll.lean,MathlibTest/module.lean,MathlibTest/nomatch.lean,MathlibTest/order.lean,MathlibTest/peel.lean,MathlibTest/pnat_to_nat.lean,MathlibTest/rsuffices.lean,MathlibTest/set_like.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/spread.lean,MathlibTest/tfae.lean,MathlibTest/vec_notation.lean,lakefile.lean,not_modulized_modules.txt,scripts/README.md,scripts/check_modulized_tests.lean 65 4 ['github-actions', 'mathlib-dependent-issues', 'mathlib-merge-conflicts'] nobody
0-16267
4 hours ago
unknown
0-0
0 seconds
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 478/0 Mathlib.lean,Mathlib/ModelTheory/PartialTypes.lean,Mathlib/ModelTheory/Semantics.lean,Mathlib/ModelTheory/Syntax.lean 4 5 ['NoneMore', 'github-actions', 'mathlib-dependent-issues', 'vihdzp'] nobody
0-14313
3 hours ago
0-77794
21 hours ago
0-322
5 minutes
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 64/2 Mathlib/CategoryTheory/Monoidal/Rigid/Basic.lean 1 17 ['dagurtomas', 'github-actions', 'parabamoghv', 'robin-carlier'] nobody
0-13177
3 hours ago
0-13177
3 hours ago
5-41562
5 days
35031 JovanGerb
author:JovanGerb
 feat(CategoryTheory/Limits/Cones): use `to_dual` This PR uses `to_dual` to generate `Cocone` from `Cone`. Notes: - Sadly, it is not possible to translate `cones : Cᵒᵖ ⥤ Type max u₁ v₃` and `cocones : C ⥤ Type max u₁ v₃` (and similarly `yoneda` and `coyoneda`), because one version has `ᵒᵖ` in the type and the other doesn't. To allow dualizing `Cone.extend`, I've inlined the definition of `Cone.extensions`. - This PR makes many changes in other files where `to_dual` tags were missing. Only the minimal necessary changes have been made. Those files may be extended with more `to_dual` tags in future PRs. - `Cone.extendIso` and `Cocone.extendIso` weren't compatible for `to_dual` because they were the other way around. I chose to swap the direction of the isomorphisms in `Cone.extendIso`. Similarly `precomposeEquivalence` and `postComposeEquivalence` weren't compatible. I chose to swap the direction of an isomorphism in `precomposeEquivalence`. These changes required a few adaptations in `Mathlib.CategoryTheory.Limits.IsLimit` and elsewhere. --- - [x] depends on: #34863 - [x] depends on: #35065 - [x] depends on: #36322 - [x] depends on: #36383 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-category-theory 209/489 Mathlib/CategoryTheory/Category/Basic.lean,Mathlib/CategoryTheory/Equivalence.lean,Mathlib/CategoryTheory/Functor/Basic.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/Opposites.lean,Mathlib/CategoryTheory/Whiskering.lean,Mathlib/Combinatorics/Quiver/Basic.lean 14 21 ['JovanGerb', 'github-actions', 'joneugster', 'leanprover-radar', 'mathlib-dependent-issues', 'mathlib-merge-conflicts', 'robin-carlier'] robin-carlier
assignee:robin-carlier
0-12679
3 hours ago
0-41231
11 hours ago
2-36191
2 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 316/80 Mathlib/Tactic/DefEqAbuse.lean,Mathlib/Tactic/FastInstance.lean,MathlibTest/CheckInstance.lean,MathlibTest/DefEqAbuse.lean 4 14 ['eric-wieser', 'github-actions', 'kim-em'] nobody
0-11514
3 hours ago
0-75529
20 hours ago
1-5363
1 day
36717 kim-em
author:kim-em
 feat(Tactic/FastInstance): skip mkAuxTheorem for proof fields when types agree at instances transparency This PR improves how \`fast_instance%\` handles proof-valued constructor fields. Previously, proof fields were always wrapped in \`mkAuxTheorem\`, which creates a separate auxiliary theorem carrying the expected type. This is unnecessary when the proof's actual type already agrees with the expected type at instances transparency — in that case the proof can be assigned directly. The new behaviour: check whether the proof's type agrees with the expected type at instances transparency. If yes, assign directly. If no (indicating a binder type mismatch), wrap with \`mkAuxTheorem\` as before. This is a natural analogue of the data-field binder type checking that \`fast_instance%\` already performs, applied to proof fields. 🤖 Prepared with Claude Code t-meta LLM-generated delegated 9/4 Mathlib/Tactic/FastInstance.lean,MathlibTest/fast_instance.lean 2 4 ['eric-wieser', 'github-actions', 'mathlib-bors'] nobody
0-11348
3 hours ago
0-82847
23 hours ago
0-85890
23 hours
36390 Thmoas-Guan
author:Thmoas-Guan
 feat(RingTheory/Ideal): move and add some lemma about smul top move and add some lemma about smul top --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-ring-theory awaiting-author 35/8 Mathlib/RingTheory/Ideal/Operations.lean,Mathlib/RingTheory/Ideal/Quotient/Operations.lean,Mathlib/RingTheory/Regular/RegularSequence.lean 3 7 ['Thmoas-Guan', 'chrisflav', 'github-actions', 'tb65536'] chrisflav
assignee:chrisflav
0-11073
3 hours ago
0-44128
12 hours ago
7-40037
7 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
0-9435
2 hours ago
0-8035
2 hours ago
0-3928
1 hour
36759 vihdzp
author:vihdzp
 feat: `∃ a, f a ≤ x < f (succ a)` for a normal function `f` Most of the diff is just re-sectioning. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-order 55/35 Mathlib/Order/IsNormal.lean 1 1 ['github-actions'] nobody
0-8597
2 hours ago
0-8479
2 hours ago
0-8511
2 hours
36714 kim-em
author:kim-em
 chore: bot instructions clone mathlib to a temp dir This PR updates the copy-pasteable instructions posted by the nightly bots so they no longer require the user to have an existing Mathlib checkout. Instead, they create a fresh clone in a unique temp directory using \`mktemp -d\`. This also avoids potential fragility from running these scripts inside a worktree. Affects two bots: - \`nightly_detect_failure.yml\`: bump PR creation instructions - \`nightly_bump_and_merge.yml\`: failed lean-pr-testing merge instructions 🤖 Prepared with Claude Code CI LLM-generated awaiting-author 9/6 .github/workflows/nightly_bump_and_merge.yml,.github/workflows/nightly_detect_failure.yml 2 2 ['github-actions', 'marcelolynch'] nobody
0-7380
2 hours ago
1-5137
1 day ago
1-5092
1 day
36755 Komyyy
author:Komyyy
 doc: correct the LLM-hallucinated reference ```lean4 /-- For a prime `p`, a ℚ-linear combination `∑_{i < p} αᵢ ζⁱ` vanishes if and only if all coefficients `αᵢ` are equal. This follows from the irreducibility of the `p`-th cyclotomic polynomial. See Washington, *Introduction to Cyclotomic Fields*, Lemma 2.8.5. -/ lemma sum_eq_zero_iff_forall_eq (hp : p.Prime) (hζ : IsPrimitiveRoot ζ p) (α : Fin p → ℚ) : ``` This lemma was introduced in #34592. According to the author's other PRs (especially #34578), #34592 seems to have been generated by LLM. This docstring references Lemma 2.8.5 in "Washington, Introduction to Cyclotomic Fields". I checked it on Springer, and found that there is no Lemma 2.8.5. According to the author's last comment in #34578 and @bryangingechen 's check in this PR, the correct reference is "de Launey–Flannery, Algebraic Design Theory". So, I correct this LLM-hallucination reference, but I keep the lemma itself since it may be useful. (I don't know much about cyclotomic fields) --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) documentation t-ring-theory 1/1 Mathlib/RingTheory/Polynomial/Cyclotomic/Roots.lean 1 5 ['Komyyy', 'bryangingechen', 'github-actions', 'grunweg'] nobody
0-4526
1 hour ago
0-5308
1 hour ago
0-18661
5 hours
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 - [ ] depends on: #35909 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) large-import t-linter merge-conflict 2073/526 Archive/Imo/Imo2010Q5.lean,Archive/Wiedijk100Theorems/BuffonsNeedle.lean,Counterexamples/CliffordAlgebraNotInjective.lean,Counterexamples/HeawoodUnitDistance.lean,Mathlib/Algebra/AffineMonoid/Basic.lean,Mathlib/Algebra/Category/Grp/EpiMono.lean,Mathlib/Algebra/Category/Ring/Basic.lean,Mathlib/Algebra/GroupWithZero/Range.lean,Mathlib/Algebra/Homology/HomotopyCategory/MappingCocone.lean,Mathlib/Algebra/Homology/Refinements.lean,Mathlib/Algebra/Homology/SpectralObject/Basic.lean,Mathlib/Algebra/Homology/SpectralObject/Cycles.lean,Mathlib/Algebra/Homology/SpectralObject/HasSpectralSequence.lean,Mathlib/Algebra/Homology/SpectralObject/Page.lean,Mathlib/Algebra/Module/TransferInstance.lean,Mathlib/Algebra/Order/CauSeq/Basic.lean,Mathlib/Algebra/Order/GroupWithZero/Range.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/SimplicialSet/CompStructTruncated.lean,Mathlib/AlgebraicTopology/SimplicialSet/Path.lean,Mathlib/AlgebraicTopology/SimplicialSet/StrictSegal.lean,Mathlib/Analysis/CStarAlgebra/ContinuousFunctionalCalculus/Unital.lean,Mathlib/Analysis/InnerProductSpace/Reproducing.lean,Mathlib/Analysis/Normed/Algebra/Basic.lean,Mathlib/Analysis/Normed/Algebra/Spectrum.lean,Mathlib/Analysis/Normed/Field/Krasner.lean,Mathlib/Analysis/Normed/Module/PiTensorProduct/ProjectiveSeminorm.lean,Mathlib/Analysis/Normed/Ring/WithAbs.lean,Mathlib/Analysis/Real/Pi/Bounds.lean,Mathlib/Analysis/SpecialFunctions/Gamma/Digamma.lean,Mathlib/CategoryTheory/Adhesive/Basic.lean,Mathlib/CategoryTheory/Comma/Over/OverClass.lean,Mathlib/CategoryTheory/Functor/ReflectsIso/Exact.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/CategoryTheory/Triangulated/TStructure/ETrunc.lean,Mathlib/CategoryTheory/Triangulated/TStructure/TruncLEGT.lean,Mathlib/CategoryTheory/Triangulated/TStructure/TruncLTGE.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/FieldTheory/RatFunc/Luroth.lean,Mathlib/Geometry/Manifold/ContMDiffMFDeriv.lean,Mathlib/Geometry/Manifold/Notation.lean,Mathlib/Geometry/Manifold/VectorBundle/MDifferentiable.lean,Mathlib/Geometry/Manifold/VectorField/LieBracket.lean,Mathlib/Geometry/Manifold/VectorField/Pullback.lean,Mathlib/LinearAlgebra/AffineSpace/Simplex/Centroid.lean,Mathlib/LinearAlgebra/Center.lean,Mathlib/LinearAlgebra/TensorPower/Symmetric.lean,Mathlib/LinearAlgebra/TensorProduct/Decomposition.lean,Mathlib/LinearAlgebra/TensorProduct/Defs.lean,Mathlib/MeasureTheory/Function/ConditionalExpectation/PullOut.lean,Mathlib/MeasureTheory/Function/L1Space/Integrable.lean,Mathlib/MeasureTheory/Integral/TorusIntegral.lean,Mathlib/MeasureTheory/Measure/Haar/InnerProductSpace.lean,Mathlib/MeasureTheory/Measure/MutuallySingular.lean,Mathlib/ModelTheory/Syntax.lean,Mathlib/ModelTheory/Topology/Types.lean,Mathlib/NumberTheory/FactorisationProperties.lean,Mathlib/NumberTheory/Height/Basic.lean,Mathlib/NumberTheory/ModularForms/EisensteinSeries/E2/Summable.lean,Mathlib/NumberTheory/ModularForms/EisensteinSeries/E2/Transform.lean,Mathlib/NumberTheory/Niven.lean,Mathlib/NumberTheory/NumberField/InfinitePlace/Completion.lean,Mathlib/NumberTheory/Padics/Complex.lean,Mathlib/NumberTheory/Padics/WithVal.lean,Mathlib/RepresentationTheory/Intertwining.lean,Mathlib/RingTheory/LaurentSeries.lean,Mathlib/RingTheory/Localization/Basic.lean,Mathlib/RingTheory/Nilpotent/Exp.lean,Mathlib/RingTheory/Teichmuller.lean,Mathlib/RingTheory/Valuation/Basic.lean,Mathlib/RingTheory/Valuation/Discrete/RankOne.lean 117 63 ['SnirBroshi', 'adomani', 'github-actions', 'grunweg', 'leanprover-radar', 'mathlib-dependent-issues', 'mathlib-merge-conflicts', 'mathlib4-merge-conflict-bot'] nobody
0-3817
1 hour ago
149-25811
149 days ago
0-6463
1 hour
36758 LarsenClose
author:LarsenClose
 feat(Algebra/Category/ModuleCat): add locally finitely presentable instance Prove that `ModuleCat R` is locally finitely presentable for any commutative ring `R`. The free rank-1 module is a small strong generator of `ℵ₀`-presentable objects (Gabriel-Ulmer, Adamek-Rosicky Theorem 1.11). This is the first `IsLocallyFinitelyPresentable` instance for an algebraic category in Mathlib. Opens the path to LFP instances for other algebraic categories (groups, rings, etc.) via the same generator pattern. Companion to #36104. new-contributor t-algebra
label:t-algebra$
 123/0 Mathlib.lean,Mathlib/Algebra/Category/ModuleCat/Presentable.lean 2 5 ['LarsenClose', 'eric-wieser', 'github-actions'] nobody
0-2888
48 minutes ago
0-10896
3 hours ago
0-10851
3 hours
35243 ScottCarnahan
author:ScottCarnahan
 chore(Algebra/MonoidAlgebra/PointwiseSMul): switch action from Finsupp to (Add)MonoidAlgebra and multiplicativize This PR moves the API for convolution action on functions from `Finsupp` to `MonoidAlgebra`, adding a `Semiring` hypothesis. We do this move, because the convolution action of finsupps on formal functions is more naturally expressed as an action by the monoid algebra with its convolutional multiplication. This PR also multiplicativizes, preserving the original material with `to_additive`. --- The large import is on a module that will be deprecated - I had to add the imports to make the deprecated flags work, but ultimately they will be irrelevant. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) large-import t-algebra
label:t-algebra$
 109/52 Mathlib.lean,Mathlib/Algebra/MonoidAlgebra/PointwiseSMul.lean,Mathlib/Data/Finsupp/PointwiseSMul.lean 3 2 ['github-actions', 'mathlib-merge-conflicts'] eric-wieser
assignee:eric-wieser
0-2654
44 minutes ago
15-119
15 days ago
19-67413
19 days
36613 dagurtomas
author:dagurtomas
 Typecat refactor 3 --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) 3449/2842 Mathlib/Algebra/Category/AlgCat/Basic.lean,Mathlib/Algebra/Category/AlgCat/Limits.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/CartesianMonoidal.lean,Mathlib/Algebra/Category/Grp/EpiMono.lean,Mathlib/Algebra/Category/Grp/LeftExactFunctor.lean,Mathlib/Algebra/Category/Grp/Limits.lean,Mathlib/Algebra/Category/Grp/Yoneda.lean,Mathlib/Algebra/Category/ModuleCat/Adjunctions.lean,Mathlib/Algebra/Category/ModuleCat/Basic.lean,Mathlib/Algebra/Category/ModuleCat/EpiMono.lean,Mathlib/Algebra/Category/ModuleCat/FilteredColimits.lean,Mathlib/Algebra/Category/ModuleCat/LeftResolution.lean,Mathlib/Algebra/Category/ModuleCat/Limits.lean,Mathlib/Algebra/Category/ModuleCat/Presheaf.lean,Mathlib/Algebra/Category/ModuleCat/Presheaf/EpiMono.lean,Mathlib/Algebra/Category/ModuleCat/Presheaf/Free.lean,Mathlib/Algebra/Category/ModuleCat/Presheaf/Generator.lean,Mathlib/Algebra/Category/ModuleCat/Presheaf/Sheafify.lean,Mathlib/Algebra/Category/ModuleCat/Semi.lean,Mathlib/Algebra/Category/ModuleCat/Sheaf.lean,Mathlib/Algebra/Category/ModuleCat/Sheaf/Free.lean,Mathlib/Algebra/Category/ModuleCat/Sheaf/PullbackFree.lean,Mathlib/Algebra/Category/ModuleCat/Stalk.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/MonCat/Yoneda.lean,Mathlib/Algebra/Category/Ring/Adjunctions.lean,Mathlib/Algebra/Category/Ring/Basic.lean,Mathlib/Algebra/Category/Ring/Constructions.lean,Mathlib/Algebra/Category/Ring/FilteredColimits.lean,Mathlib/Algebra/Category/Ring/Limits.lean,Mathlib/Algebra/Category/Semigrp/Basic.lean,Mathlib/Algebra/Homology/HomotopyCategory/ShortExact.lean,Mathlib/Algebra/Homology/ShortComplex/ConcreteCategory.lean,Mathlib/AlgebraicGeometry/AffineScheme.lean,Mathlib/AlgebraicGeometry/AffineSpace.lean,Mathlib/AlgebraicGeometry/AffineTransitionLimit.lean,Mathlib/AlgebraicGeometry/Cover/Directed.lean,Mathlib/AlgebraicGeometry/Gluing.lean,Mathlib/AlgebraicGeometry/IdealSheaf/Subscheme.lean,Mathlib/AlgebraicGeometry/Normalization.lean,Mathlib/AlgebraicGeometry/RelativeGluing.lean,Mathlib/AlgebraicGeometry/Scheme.lean,Mathlib/AlgebraicGeometry/Sites/ConstantSheaf.lean,Mathlib/AlgebraicGeometry/Sites/MorphismProperty.lean,Mathlib/AlgebraicGeometry/Sites/Representability.lean,Mathlib/AlgebraicTopology/ExtraDegeneracy.lean,Mathlib/AlgebraicTopology/Quasicategory/StrictSegal.lean,Mathlib/AlgebraicTopology/SimplexCategory/Basic.lean,Mathlib/AlgebraicTopology/SimplexCategory/Defs.lean,Mathlib/AlgebraicTopology/SimplicialNerve.lean,Mathlib/AlgebraicTopology/SimplicialSet/Basic.lean,Mathlib/AlgebraicTopology/SimplicialSet/Coskeletal.lean,Mathlib/AlgebraicTopology/SimplicialSet/Degenerate.lean,Mathlib/AlgebraicTopology/SimplicialSet/Dimension.lean,Mathlib/AlgebraicTopology/SimplicialSet/Finite.lean,Mathlib/AlgebraicTopology/SimplicialSet/HoFunctorMonoidal.lean,Mathlib/AlgebraicTopology/SimplicialSet/HomotopyCat.lean,Mathlib/AlgebraicTopology/SimplicialSet/Horn.lean,Mathlib/AlgebraicTopology/SimplicialSet/Monoidal.lean,Mathlib/AlgebraicTopology/SimplicialSet/Nerve.lean,Mathlib/AlgebraicTopology/SimplicialSet/NerveAdjunction.lean,Mathlib/AlgebraicTopology/SimplicialSet/NerveNondegenerate.lean,Mathlib/AlgebraicTopology/SimplicialSet/NonDegenerateSimplices.lean,Mathlib/AlgebraicTopology/SimplicialSet/Path.lean,Mathlib/AlgebraicTopology/SimplicialSet/RelativeMorphism.lean,Mathlib/AlgebraicTopology/SimplicialSet/StdSimplex.lean,Mathlib/AlgebraicTopology/SimplicialSet/StrictSegal.lean,Mathlib/AlgebraicTopology/SimplicialSet/Subcomplex.lean,Mathlib/AlgebraicTopology/SingularSet.lean,Mathlib/Analysis/Normed/Group/SemiNormedGrp.lean,Mathlib/CategoryTheory/Action.lean,Mathlib/CategoryTheory/Action/Basic.lean,Mathlib/CategoryTheory/Action/Concrete.lean,Mathlib/CategoryTheory/Action/Monoidal.lean,Mathlib/CategoryTheory/Adhesive/Basic.lean,Mathlib/CategoryTheory/Adjunction/Limits.lean,Mathlib/CategoryTheory/Adjunction/Opposites.lean,Mathlib/CategoryTheory/Category/Cat.lean,Mathlib/CategoryTheory/Category/Cat/Adjunction.lean,Mathlib/CategoryTheory/Category/Cat/Limit.lean,Mathlib/CategoryTheory/Category/PartialFun.lean,Mathlib/CategoryTheory/Category/Pointed.lean,Mathlib/CategoryTheory/Category/RelCat.lean,Mathlib/CategoryTheory/CodiscreteCategory.lean,Mathlib/CategoryTheory/CofilteredSystem.lean,Mathlib/CategoryTheory/Comma/Presheaf/Basic.lean,Mathlib/CategoryTheory/ConcreteCategory/Basic.lean,Mathlib/CategoryTheory/ConcreteCategory/Elementwise.lean,Mathlib/CategoryTheory/ConcreteCategory/EpiMono.lean,Mathlib/CategoryTheory/ConcreteCategory/Forget.lean,Mathlib/CategoryTheory/ConcreteCategory/Representable.lean,Mathlib/CategoryTheory/Core.lean,Mathlib/CategoryTheory/Elements.lean 299 2 ['github-actions'] nobody
0-1982
33 minutes ago
0-1219
19 minutes ago
0-6624
1 hour
33375 kex-y
author:kex-y
 feat(Probability): Local and stable properties --- Defines local and stable properties which is useful for local martingales. - [x] depends on: #33371 - [x] depends on: #33374 - [x] depends on: #33372 Co-authored-by: @RemyDegenne [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) brownian t-measure-probability 390/0 Mathlib.lean,Mathlib/MeasureTheory/Measure/MeasureSpace.lean,Mathlib/Probability/Process/LocalProperty.lean 3 38 ['EtienneC30', 'github-actions', 'kex-y', 'mathlib-dependent-issues', 'mathlib-merge-conflicts', 'mathlib4-merge-conflict-bot'] nobody
0-1518
25 minutes ago
3-72354
3 days ago
7-5163
7 days
35011 whocares-abt
author:whocares-abt
 feat(Combinatorics/SimpleGraph/Copy): add degree of copy less than original add two theorems relating degree of a graph and it's copy t-combinatorics new-contributor awaiting-author 12/0 Mathlib/Combinatorics/SimpleGraph/Copy.lean 1 13 ['SnirBroshi', 'YaelDillies', 'github-actions', 'themathqueen', 'vihdzp'] YaelDillies
assignee:YaelDillies
0-1132
18 minutes ago
1-73136
1 day ago
34-6686
34 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
593-79153
1 year ago
unknown
0-0
0 seconds
14167 alreadydone
author:alreadydone
 feat: Group scheme structure on Weierstrass curve --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict WIP t-algebraic-geometry workshop-AIM-AG-2024 727/41 Mathlib.lean,Mathlib/Algebra/GroupWithZero/NonZeroDivisors.lean,Mathlib/Algebra/Polynomial/Bivariate.lean,Mathlib/AlgebraicGeometry/EllipticCurve/Group.lean,Mathlib/AlgebraicGeometry/EllipticCurve/Scheme.lean,Mathlib/AlgebraicGeometry/EllipticCurve/Universal.lean,Mathlib/Data/Finsupp/Basic.lean,Mathlib/GroupTheory/MonoidLocalization.lean,Mathlib/LinearAlgebra/Basis.lean,Mathlib/LinearAlgebra/FreeModule/Basic.lean,Mathlib/RingTheory/AlgebraTower.lean,Mathlib/RingTheory/MvPolynomial/Basic.lean 12 3 ['Multramate', 'github-actions', 'jcommelin'] nobody
593-79153
1 year ago
628-39508
628 days ago
0-12
12 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
593-79152
1 year ago
657-79850
657 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
593-79151
1 year ago
667-39138
667 days ago
5-74504
5 days
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
593-79151
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
593-79151
1 year ago
662-17179
662 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
593-79150
1 year ago
698-14846
698 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
593-79149
1 year ago
780-71273
780 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
593-79149
1 year ago
760-47199
760 days ago
1-29105
1 day
10594 lecopivo
author:lecopivo
 feat: `fun_trans` function transformation tactic e.g. for computing derivatives feat: `fun_trans` function transformation tactic e.g. for computing derivatives Function transformation tactic/simproc. For example it can be used for computing derivatives. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict WIP t-meta 1819/56 Mathlib.lean,Mathlib/Tactic.lean,Mathlib/Tactic/FunProp/Core.lean,Mathlib/Tactic/FunProp/Decl.lean,Mathlib/Tactic/FunProp/Elab.lean,Mathlib/Tactic/FunProp/FunctionData.lean,Mathlib/Tactic/FunProp/MorExt.lean,Mathlib/Tactic/FunProp/Theorems.lean,Mathlib/Tactic/FunTrans/Attr.lean,Mathlib/Tactic/FunTrans/Core.lean,Mathlib/Tactic/FunTrans/Decl.lean,Mathlib/Tactic/FunTrans/Elab.lean,Mathlib/Tactic/FunTrans/Theorems.lean,Mathlib/Tactic/FunTrans/Types.lean,test/fun_prop2.lean,test/fun_prop_dev.lean,test/fun_trans_dev.lean 17 11 ['github-actions'] nobody
593-79149
1 year ago
unknown
0-0
0 seconds
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
593-79149
1 year ago
643-57551
643 days ago
64-12984
64 days
10842 mcdoll
author:mcdoll
 chore: simplify proofs using new positivity extensions and tests --- - [x] depends on: #10661 - [ ] depends on: #10796 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict WIP blocked-by-other-PR 98/50 Mathlib/Analysis/Convolution.lean,Mathlib/Analysis/SpecialFunctions/Gaussian.lean,Mathlib/MeasureTheory/Covering/Differentiation.lean,Mathlib/MeasureTheory/Function/ConditionalExpectation/CondexpL1.lean,Mathlib/MeasureTheory/Function/ConditionalExpectation/Real.lean,Mathlib/MeasureTheory/Function/ConditionalExpectation/Unique.lean,Mathlib/MeasureTheory/Function/ContinuousMapDense.lean,Mathlib/MeasureTheory/Integral/Bochner.lean,Mathlib/MeasureTheory/Measure/Tilted.lean,Mathlib/Probability/Martingale/Upcrossing.lean,Mathlib/Probability/Moments.lean,Mathlib/Probability/Variance.lean,Mathlib/Tactic/Positivity/Core.lean,test/positivity.lean 14 1 ['leanprover-community-mathlib4-bot'] nobody
593-79149
1 year ago
unknown
0-0
0 seconds
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
593-79149
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
593-79148
1 year ago
810-51472
810 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
593-79148
1 year ago
833-44511
833 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
593-79148
1 year ago
841-26690
841 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
593-79148
1 year ago
810-44795
810 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
593-79148
1 year ago
833-69044
833 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
593-79148
1 year ago
829-52242
829 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
593-79148
1 year ago
827-24578
827 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
593-79148
1 year ago
800-37239
800 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
593-79148
1 year ago
unknown
0-0
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
593-79148
1 year ago
784-23374
784 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
593-79148
1 year ago
788-28746
788 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
593-79148
1 year ago
788-33994
788 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
593-79148
1 year ago
unknown
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0 seconds
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
593-79148
1 year ago
unknown
0-0
0 seconds
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
593-79148
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
593-79148
1 year ago
unknown
0-0
0 seconds
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
593-79147
1 year ago
879-41911
879 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
593-79147
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 36 ['adomani', 'alreadydone', 'digama0', 'eric-wieser', 'ericrbg', 'jcommelin', 'leanprover-bot', 'sgouezel'] nobody
593-79147
1 year ago
868-44644
868 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
593-79147
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
593-79147
1 year ago
unknown
0-0
0 seconds
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
593-79147
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
593-79147
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
593-79147
1 year ago
872-47975
872 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
593-79147
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
593-79147
1 year ago
891-66379
891 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
593-79147
1 year ago
826-62750
826 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
593-79147
1 year ago
888-27455
888 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
593-79147
1 year ago
881-73285
881 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
593-79147
1 year ago
740-2578
740 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
593-79147
1 year ago
648-9255
648 days ago
1-47913
1 day
7909 mcdoll
author:mcdoll
 fix(Tactic/Continuity): remove npowRec and add new tag for Continuous.pow --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict WIP t-topology t-meta 14/9 Mathlib/Tactic/Continuity.lean,Mathlib/Topology/Category/TopCat/Limits/Basic.lean,test/Continuity.lean 3 2 ['eric-wieser'] nobody
593-79147
1 year ago
873-18047
873 days ago
0-72515
20 hours
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
593-79147
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
593-79147
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
593-79147
1 year ago
849-12881
849 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
593-79146
1 year ago
1006-65198
1006 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
593-79146
1 year ago
1004-80272
1004 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
593-79146
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
593-79146
1 year ago
961-79508
961 days ago
9-71263
9 days
6079 eric-wieser
author:eric-wieser
 fix: deduplicate variables `variables {A} [Ring A]` meant "update the binder of `A`" in Lean 3, but now means "create a duplicate variable called `A`" (or at least, does so when inspecting the state within the variables line). This removes a number of porting notes that were stumbling over this behavior. [Related Zulip thread](https://leanprover.zulipchat.com/#narrow/stream/270676-lean4/topic/unexpected.20.60variable.60.20behaviour.3F/near/360154080) --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict awaiting-CI 1012/443 Archive/Wiedijk100Theorems/CubingACube.lean,Mathlib/Algebra/Category/ModuleCat/Adjunctions.lean,Mathlib/Algebra/CharP/Basic.lean,Mathlib/Algebra/CovariantAndContravariant.lean,Mathlib/Algebra/DirectLimit.lean,Mathlib/Algebra/DirectSum/Finsupp.lean,Mathlib/Algebra/DirectSum/Module.lean,Mathlib/Algebra/GradedMonoid.lean,Mathlib/Algebra/Group/Pi.lean,Mathlib/Algebra/GroupPower/Basic.lean,Mathlib/Algebra/GroupPower/Lemmas.lean,Mathlib/Algebra/Hom/Aut.lean,Mathlib/Algebra/Hom/Equiv/Basic.lean,Mathlib/Algebra/Hom/Group.lean,Mathlib/Algebra/Homology/HomologicalComplex.lean,Mathlib/Algebra/Homology/HomotopyCategory.lean,Mathlib/Algebra/Homology/ImageToKernel.lean,Mathlib/Algebra/Homology/ShortComplex/LeftHomology.lean,Mathlib/Algebra/IndicatorFunction.lean,Mathlib/Algebra/Jordan/Basic.lean,Mathlib/Algebra/Lie/Classical.lean,Mathlib/Algebra/Lie/Subalgebra.lean,Mathlib/Algebra/Lie/Submodule.lean,Mathlib/Algebra/Lie/TensorProduct.lean,Mathlib/Algebra/Module/Injective.lean,Mathlib/Algebra/Module/LinearMap.lean,Mathlib/Algebra/Module/Submodule/Basic.lean,Mathlib/Algebra/MonoidAlgebra/Basic.lean,Mathlib/Algebra/MonoidAlgebra/Grading.lean,Mathlib/Algebra/Order/CompleteField.lean,Mathlib/Algebra/Order/Pi.lean,Mathlib/Algebra/Order/Ring/Lemmas.lean,Mathlib/Algebra/Ring/Equiv.lean,Mathlib/Algebra/SMulWithZero.lean,Mathlib/Algebra/Star/Module.lean,Mathlib/Algebra/Support.lean,Mathlib/AlgebraicGeometry/EllipticCurve/Point.lean,Mathlib/AlgebraicGeometry/Morphisms/RingHomProperties.lean,Mathlib/AlgebraicGeometry/ProjectiveSpectrum/Scheme.lean,Mathlib/AlgebraicGeometry/StructureSheaf.lean,Mathlib/AlgebraicTopology/DoldKan/Decomposition.lean,Mathlib/AlgebraicTopology/MooreComplex.lean,Mathlib/Analysis/Calculus/ContDiff.lean,Mathlib/Analysis/Calculus/FormalMultilinearSeries.lean,Mathlib/Analysis/Calculus/LocalExtr.lean,Mathlib/Analysis/Calculus/TangentCone.lean,Mathlib/Analysis/Convex/Basic.lean,Mathlib/Analysis/Convex/Combination.lean,Mathlib/Analysis/Convex/Extreme.lean,Mathlib/Analysis/Convex/Function.lean,Mathlib/Analysis/Convex/Hull.lean,Mathlib/Analysis/Convex/Independent.lean,Mathlib/Analysis/Convex/Intrinsic.lean,Mathlib/Analysis/Convex/Join.lean,Mathlib/Analysis/Convex/Quasiconvex.lean,Mathlib/Analysis/Convex/Segment.lean,Mathlib/Analysis/Convex/Star.lean,Mathlib/Analysis/Convex/Uniform.lean,Mathlib/Analysis/Convolution.lean,Mathlib/Analysis/Fourier/RiemannLebesgueLemma.lean,Mathlib/Analysis/InnerProductSpace/Calculus.lean,Mathlib/Analysis/LocallyConvex/AbsConvex.lean,Mathlib/Analysis/LocallyConvex/BalancedCoreHull.lean,Mathlib/Analysis/LocallyConvex/Basic.lean,Mathlib/Analysis/LocallyConvex/Bounded.lean,Mathlib/Analysis/LocallyConvex/WithSeminorms.lean,Mathlib/Analysis/Normed/Field/Basic.lean,Mathlib/Analysis/Normed/Group/AddCircle.lean,Mathlib/Analysis/Normed/Group/Hom.lean,Mathlib/Analysis/Normed/Group/Seminorm.lean,Mathlib/Analysis/NormedSpace/Completion.lean,Mathlib/Analysis/NormedSpace/LinearIsometry.lean,Mathlib/Analysis/NormedSpace/Multilinear.lean,Mathlib/Analysis/NormedSpace/OperatorNorm.lean,Mathlib/Analysis/ODE/PicardLindelof.lean,Mathlib/Analysis/Seminorm.lean,Mathlib/CategoryTheory/Action.lean,Mathlib/CategoryTheory/Bicategory/LocallyDiscrete.lean,Mathlib/CategoryTheory/Bicategory/NaturalTransformation.lean,Mathlib/CategoryTheory/Closed/Ideal.lean,Mathlib/CategoryTheory/ConcreteCategory/UnbundledHom.lean,Mathlib/CategoryTheory/Core.lean,Mathlib/CategoryTheory/Endofunctor/Algebra.lean,Mathlib/CategoryTheory/Enriched/Basic.lean,Mathlib/CategoryTheory/EssentialImage.lean,Mathlib/CategoryTheory/FullSubcategory.lean,Mathlib/CategoryTheory/Functor/Category.lean,Mathlib/CategoryTheory/Limits/Fubini.lean,Mathlib/CategoryTheory/Limits/HasLimits.lean,Mathlib/CategoryTheory/Limits/Preserves/Shapes/Kernels.lean,Mathlib/CategoryTheory/Limits/Shapes/BinaryProducts.lean,Mathlib/CategoryTheory/Limits/Shapes/Biproducts.lean,Mathlib/CategoryTheory/Limits/Shapes/Equalizers.lean,Mathlib/CategoryTheory/Limits/Shapes/Images.lean,Mathlib/CategoryTheory/Limits/Shapes/WidePullbacks.lean,Mathlib/CategoryTheory/Linear/LinearFunctor.lean,Mathlib/CategoryTheory/Localization/Construction.lean,Mathlib/CategoryTheory/Monoidal/Braided.lean,Mathlib/CategoryTheory/Monoidal/CommMon_.lean,Mathlib/CategoryTheory/Monoidal/Discrete.lean 302 1 ['timotree3'] nobody
593-79146
1 year ago
unknown
0-0
0 seconds
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
593-79146
1 year ago
unknown
0-0
0 seconds
6210 MohanadAhmed
author:MohanadAhmed
 feat(Data/IsROrC/Basic): add a `StarOrderedRing` instance This PR implements a suggestion by @urkud on [Zulip thread](https://leanprover.zulipchat.com/#narrow/stream/113488-general/topic/PartialOrder.20and.20StarOrderedRing.20on.20IsROrC) on how to get a `StarOrderedRing` on the `IsROrC` class. In that discussion the suggested step were: 1. Add PartialOrder K to the list of extends and add le_iff_re_im : z ≤ w ↔ re z ≤ re w ∧ im z = im w to the list of axioms. 2. Prove StarOrderedRing instance for any IsROrC. 3. Add (almost trivial) le_iff_re_im proofs to IsROrC instances for real and complex numbers. This PR does exactly these three steps --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict WIP t-algebra t-analysis
label:t-algebra$
 25/24 Mathlib/Analysis/Complex/Basic.lean,Mathlib/Analysis/SpecialFunctions/Pow/Deriv.lean,Mathlib/Data/Complex/Basic.lean,Mathlib/Data/IsROrC/Basic.lean 4 19 ['MohanadAhmed', 'eric-wieser', 'j-loreaux'] nobody
593-79146
1 year ago
950-39254
950 days ago
12-17588
12 days
6328 astrainfinita
author:astrainfinita
 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
593-79146
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
593-79146
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
593-79146
1 year ago
838-31888
838 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
593-79146
1 year ago
865-65146
865 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
593-79146
1 year ago
748-76455
748 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
593-79145
1 year ago
933-16881
933 days ago
45-49128
45 days
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
589-55455
1 year ago
693-7097
693 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
586-67124
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
581-36300
1 year ago
583-45742
583 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
579-72800
1 year ago
891-53679
891 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
579-72691
1 year ago
705-81528
705 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
579-72224
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
579-70623
1 year ago
670-75828
670 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
579-57387
1 year ago
633-77882
633 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
578-71539
1 year ago
609-32121
609 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
578-69015
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
578-68981
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
578-68900
1 year ago
800-68327
800 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
578-68865
1 year ago
734-78247
734 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
578-68687
1 year ago
622-51717
622 days ago
143-73801
143 days
9154 astrainfinita
author:astrainfinita
 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
578-68478
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
578-68452
1 year ago
932-84975
932 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
578-68397
1 year ago
968-18905
968 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
578-68391
1 year ago
944-66445
944 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
578-67001
1 year ago
610-81193
610 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
575-35536
1 year ago
639-25122
639 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. --- - [ ] 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', 'leanprover-community-mathlib4-bot'] nobody
575-35395
1 year ago
703-52336
703 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
575-35294
1 year ago
661-45278
661 days ago
29-50022
29 days
9978 astrainfinita
author:astrainfinita
 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
575-35086
1 year ago
773-29268
773 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
575-34397
1 year ago
686-68470
686 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
574-56448
1 year ago
609-62670
609 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
574-45501
1 year ago
584-5263
584 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
572-58722
1 year ago
691-50350
691 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
572-58702
1 year ago
608-51070
608 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
572-58540
1 year ago
881-82756
881 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
566-72144
1 year ago
615-74031
615 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
565-40420
1 year ago
586-34118
586 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
564-38333
1 year ago
564-42594
564 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
561-31283
1 year ago
592-76942
592 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
560-48076
1 year ago
564-81585
564 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
559-56136
1 year ago
632-26255
632 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
553-78477
1 year ago
614-32605
614 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
553-54942
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
552-46934
1 year ago
704-59676
704 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
552-4909
1 year ago
860-39091
860 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
548-14142
1 year ago
630-67102
630 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
545-71096
1 year ago
732-44766
732 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
543-59705
1 year ago
544-56794
544 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
541-22670
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
538-81991
1 year ago
642-62468
642 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
538-42342
1 year ago
626-31289
626 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
533-12344
1 year ago
893-62961
893 days ago
0-16
16 seconds
17127 astrainfinita
author:astrainfinita
 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
533-7387
1 year ago
533-7387
533 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
530-38320
1 year ago
545-66394
545 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
530-38320
1 year ago
545-66395
545 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
530-38319
1 year ago
545-62145
545 days ago
0-613
10 minutes
5995 astrainfinita
author:astrainfinita
 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
523-52529
1 year ago
648-73190
648 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
518-59669
1 year ago
521-57367
521 days ago
49-319
49 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
518-59293
1 year ago
559-5227
559 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
517-10061
1 year ago
635-42680
635 days ago
0-600
10 minutes
10796 mcdoll
author:mcdoll
 feat(Tactic/Positivity): non-negativity of functions --- This makes the `Finset.sum` and `integral_nonneg` extensions even more useful. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) WIP t-meta 27/0 Mathlib/Tactic/Positivity/Core.lean 1 1 ['YaelDillies'] nobody
512-78315
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
512-60977
1 year ago
661-43075
661 days ago
16-49744
16 days
16925 YnirPaz
author:YnirPaz
 feat(SetTheory/Cardinal/Cofinality): aleph index of singular cardinal has infinite cofinality Prove `Ordinal.aleph0_le_cof_of_not_isRegular`. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict WIP t-set-theory 6/0 Mathlib/SetTheory/Cardinal/Cofinality.lean 1 4 ['YnirPaz', 'github-actions', 'vihdzp'] nobody
509-29100
1 year ago
541-70687
541 days ago
2-57220
2 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
499-72305
1 year ago
577-46286
577 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
498-18698
1 year ago
769-68397
769 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
497-83655
1 year ago
548-72486
548 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
497-31452
1 year ago
562-19898
562 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
496-2853
1 year ago
496-2853
496 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
493-45374
1 year ago
529-34686
529 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
493-45005
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
490-10797
1 year ago
797-67267
797 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
488-84206
1 year ago
502-70394
502 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
487-68599
1 year ago
786-69042
786 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
486-78353
1 year ago
637-73989
637 days ago
63-69226
63 days
16637 astrainfinita
author:astrainfinita
 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
486-77591
1 year ago
551-84947
551 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
483-54573
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
482-41227
1 year ago
710-68655
710 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
481-64569
1 year ago
522-50150
522 days ago
0-74903
20 hours
17623 astrainfinita
author:astrainfinita
 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
481-64569
1 year ago
488-57128
488 days ago
33-53295
33 days
17624 astrainfinita
author:astrainfinita
 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
478-15341
1 year ago
522-49020
522 days ago
0-465
7 minutes
17513 astrainfinita
author:astrainfinita
 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
476-60763
1 year ago
520-62628
520 days ago
4-72589
4 days
17515 astrainfinita
author:astrainfinita
 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
476-60762
1 year ago
525-48274
525 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
475-66008
1 year ago
475-66008
475 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
473-42085
1 year ago
473-42085
473 days ago
3-72207
3 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
462-7754
1 year ago
462-7754
462 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
459-20223
1 year ago
485-68005
485 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
457-67549
1 year ago
480-3395
480 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
451-77369
1 year ago
648-51018
648 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
451-77368
1 year ago
737-66849
737 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
451-59629
1 year ago
471-85274
471 days ago
0-370
6 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
451-50924
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
438-31858
1 year ago
587-26924
587 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
438-31735
1 year ago
514-31088
514 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
436-6388
1 year ago
1062-8419
1062 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
434-23928
1 year ago
434-23928
434 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
432-48371
1 year ago
432-48371
432 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
427-54960
1 year ago
427-54960
427 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
425-42235
1 year ago
518-33805
518 days ago
0-4704
1 hour
18474 astrainfinita
author:astrainfinita
 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
425-41990
1 year ago
425-41990
425 days ago
76-67978
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
424-76924
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
424-61321
1 year ago
545-72482
545 days ago
9-13962
9 days
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
424-27240
1 year ago
464-26853
464 days ago
33-8818
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
422-34494
1 year ago
613-86321
613 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
422-19090
1 year ago
514-29109
514 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
420-74820
1 year ago
420-74820
420 days ago
69-24210
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
419-48899
1 year ago
425-16300
425 days ago
27-52347
27 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
417-78110
1 year ago
480-3415
480 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
412-66247
1 year ago
412-66247
412 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
410-56840
1 year ago
1058-1979
1058 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
410-34345
1 year ago
439-46624
439 days ago
101-64856
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
410-34222
1 year ago
437-15678
437 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
404-85424
1 year ago
710-68047
710 days ago
91-37374
91 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
402-41442
1 year ago
436-77372
436 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
401-40563
1 year ago
480-3407
480 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
400-23557
1 year ago
406-74474
406 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
399-34974
1 year ago
740-58653
740 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
397-51484
1 year ago
418-79754
418 days ago
52-4018
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
395-57903
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
395-57656
1 year ago
402-69278
402 days ago
37-29014
37 days
17005 YnirPaz
author:YnirPaz
 feat(SetTheory/Cardinal/Regular): define singular cardinals Define singular cardinals and prove basic lemmas about them. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict WIP t-set-theory 94/1 Mathlib.lean,Mathlib/SetTheory/Cardinal/Regular.lean,Mathlib/SetTheory/Ordinal/Basic.lean 3 28 ['YaelDillies', 'YnirPaz', 'github-actions', 'vihdzp'] nobody
393-4612
1 year ago
506-24179
506 days ago
34-16079
34 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
390-26427
1 year ago
390-26427
390 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
390-14084
1 year ago
602-72502
602 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
389-67791
1 year ago
810-53122
810 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
388-32644
1 year ago
395-28709
395 days ago
2-38741
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
383-79224
1 year ago
391-81854
391 days ago
4-9045
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
383-31692
1 year ago
555-62923
555 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
380-44285
1 year ago
631-28885
631 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
378-67375
1 year ago
616-50302
616 days ago
28-69042
28 days
14060 YnirPaz
author:YnirPaz
 feat(SetTheory/Ordinal/Clubs): define club sets and prove basic properties Create a file where club sets are defined and their basic properties are proven. I also created a new recursion principle for ordinals, bounded recursion. --- - [ ] depends on: #19189 [![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 315/3 Mathlib.lean,Mathlib/Order/SuccPred/Limit.lean,Mathlib/SetTheory/Cardinal/Cofinality.lean,Mathlib/SetTheory/Ordinal/Arithmetic.lean,Mathlib/SetTheory/Ordinal/Club.lean,Mathlib/SetTheory/Ordinal/Topology.lean 6 93 ['YaelDillies', 'YnirPaz', 'alreadydone', 'dupuisf', 'github-actions', 'mathlib4-dependent-issues-bot', 'vihdzp', 'zeramorphic'] nobody
378-8678
1 year ago
436-31162
436 days ago
93-453
93 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
377-39344
1 year ago
413-43121
413 days ago
17-17852
17 days
16000 YaelDillies
author:YaelDillies
 feat: Croot-Sisask Almost Periodicity Almost periodicity is nowadays a standard tool in additive combinatorics. From LeanAPAP --- - [ ] depends on: #15443 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-combinatorics t-analysis blocked-by-other-PR 0/0 0 4 ['github-actions', 'leanprover-community-mathlib4-bot', 'mergify'] nobody
376-68665
1 year ago
573-62336
573 days ago
0-159
2 minutes
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
376-55926
1 year ago
383-37853
383 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
376-52268
1 year ago
376-52268
376 days ago
16-76141
16 days
18470 astrainfinita
author:astrainfinita
 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
372-23695
1 year ago
372-23695
372 days ago
129-16341
129 days
16944 YnirPaz
author:YnirPaz
 feat(SetTheory/Cardinal/Cofinality): lemmas about limit ordinals and cofinality Prove that a singular cardinal has a limit aleph index and that a limit ordinal and positive cofinality. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict WIP t-set-theory 18/0 Mathlib/SetTheory/Cardinal/Cofinality.lean 1 8 ['YnirPaz', 'github-actions', 'vihdzp'] nobody
371-16571
1 year ago
541-70649
541 days ago
1-84890
1 day
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
370-47764
1 year ago
507-59283
507 days ago
22-48253
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
369-23427
1 year ago
550-75777
550 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
368-48094
1 year ago
551-51323
551 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
364-74523
11 months ago
364-74523
364 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
364-20157
11 months ago
624-84048
624 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
362-42190
11 months ago
484-20118
484 days ago
3-28829
3 days
19189 YnirPaz
author:YnirPaz
 feat(SetTheory/Ordinal/Arithmetic): order isomorphism between omega and the natural numbers --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict awaiting-author t-set-theory 44/0 Mathlib/Order/SuccPred/Limit.lean,Mathlib/SetTheory/Ordinal/Arithmetic.lean 2 21 ['YaelDillies', 'YnirPaz', 'github-actions', 'vihdzp'] nobody
361-11823
11 months ago
436-31464
436 days ago
47-37012
47 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
359-61226
11 months ago
460-15497
460 days ago
21-82868
21 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
355-18758
11 months ago
580-48301
580 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
350-75426
11 months ago
413-21100
413 days ago
7-31913
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
349-83493
11 months ago
375-26049
375 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
349-22923
11 months ago
350-27080
350 days ago
0-949
15 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
348-59385
11 months ago
364-6476
364 days ago
0-83153
23 hours
13124 astrainfinita
author:astrainfinita
 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
348-962
11 months 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
344-78482
11 months ago
538-55853
538 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
343-71527
11 months ago
364-34967
364 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
341-85385
11 months ago
365-3362
365 days ago
12-18667
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
341-60670
11 months ago
341-60671
341 days ago
57-47357
57 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
341-60668
11 months ago
341-60670
341 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
341-60141
11 months ago
383-64176
383 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
341-60141
11 months ago
383-62917
383 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
340-73202
11 months ago
473-61619
473 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
340-63398
11 months ago
415-55598
415 days ago
5-6208
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
339-83407
11 months ago
370-84906
370 days ago
0-568
9 minutes
16314 astrainfinita
author:astrainfinita
 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
335-85634
11 months ago
335-85636
335 days ago
55-36935
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
335-69287
11 months ago
337-34686
337 days ago
5-26623
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
335-30887
11 months ago
633-60794
633 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
335-30766
11 months 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
335-30741
11 months 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
335-30699
11 months ago
609-48579
609 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
335-30567
11 months ago
941-73830
941 days ago
29-67421
29 days
15483 astrainfinita
author:astrainfinita
 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
335-30527
11 months ago
583-68857
583 days ago
4-79214
4 days
16594 astrainfinita
author:astrainfinita
 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
335-30303
11 months ago
539-69850
539 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
333-34643
10 months ago
476-54609
476 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
333-34596
10 months ago
416-45064
416 days ago
8-45680
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
333-34425
10 months ago
369-53692
369 days ago
3-29389
3 days
19613 madvorak
author:madvorak
 refactor(Combinatorics/Optimization/ValuedCSP): make only valid `FractionalOperation` possible Originally `FractionalOperation` was any multiset (possible empty). Then `FractionalOperation.IsValid` said it was nonempty. Instead, I would like to make it nonempty by definition. As a result, empty/invalid fractional operation couldn't be declared at all. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-combinatorics 14/17 Mathlib/Combinatorics/Optimization/ValuedCSP.lean 1 1 ['github-actions'] nobody
333-34143
10 months ago
462-55284
462 days ago
9-74124
9 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
333-30728
10 months ago
413-21701
413 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
331-53106
10 months ago
unknown
0-0
0 seconds
12605 astrainfinita
author:astrainfinita
 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
331-47721
10 months ago
663-79292
663 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
328-73544
10 months ago
341-84185
341 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
328-52976
10 months ago
330-69881
330 days ago
0-217
3 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
326-50319
10 months ago
326-50321
326 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
326-39016
10 months ago
326-39017
326 days ago
2-12017
2 days
8370 eric-wieser
author:eric-wieser
 refactor(Analysis/NormedSpace/Exponential): remove the `𝕂` argument from `exp` This argument is still needed for almost all the lemmas, which means it can longer be found by unification. We keep around `expSeries 𝕂 A`, as it's needed for talking about the radius of convergence over different base fields. This is a prerequisite for #8372, as we can't merge the functions until they have the same interface.\ Zulip thread: [#mathlib4 > Real.exp @ 💬](https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/Real.2Eexp/near/401602245) --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) This is started from the mathport output on https://github.com/leanprover-community/mathlib/pull/19244 merge-conflict t-analysis awaiting-zulip 432/387 Mathlib/Analysis/CStarAlgebra/Exponential.lean,Mathlib/Analysis/CStarAlgebra/Spectrum.lean,Mathlib/Analysis/Normed/Algebra/Exponential.lean,Mathlib/Analysis/Normed/Algebra/MatrixExponential.lean,Mathlib/Analysis/Normed/Algebra/QuaternionExponential.lean,Mathlib/Analysis/Normed/Algebra/Spectrum.lean,Mathlib/Analysis/Normed/Algebra/TrivSqZeroExt.lean,Mathlib/Analysis/NormedSpace/DualNumber.lean,Mathlib/Analysis/SpecialFunctions/ContinuousFunctionalCalculus/ExpLog.lean,Mathlib/Analysis/SpecialFunctions/Exponential.lean,Mathlib/Analysis/SpecialFunctions/Trigonometric/Series.lean 11 29 ['YaelDillies', 'eric-wieser', 'girving', 'github-actions', 'j-loreaux', 'kbuzzard', 'leanprover-community-bot-assistant', 'urkud'] nobody
326-19946
10 months ago
347-32588
347 days ago
24-46029
24 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
324-49191
10 months ago
376-61212
376 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
322-66387
10 months ago
347-69401
347 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
322-58791
10 months ago
390-8466
390 days ago
23-20117
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
321-51459
10 months ago
373-37825
373 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
320-56698
10 months ago
610-55443
610 days ago
0-109
1 minute
13649 astrainfinita
author:astrainfinita
 chore: redefine `Nat.div2` `Nat.bodd` The new definitions are faster than the old ones. `Nat.binaryRec` will be moved to batteries (https://github.com/leanprover-community/batteries/pull/799) or core (https://github.com/leanprover/lean4/pull/3756), so relevant contents are moved to a new file temporarily. --- - [x] depends on: #15567 - [x] depends on: #19666 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict 63/88 Mathlib/Computability/Primrec.lean,Mathlib/Data/Int/Bitwise.lean,Mathlib/Data/Nat/Bits.lean,Mathlib/Data/Nat/Bitwise.lean,Mathlib/Data/Nat/Size.lean,Mathlib/Logic/Denumerable.lean,Mathlib/Logic/Encodable/Basic.lean,Mathlib/Logic/Equiv/Nat.lean 8 15 ['astrainfinita', 'digama0', 'eric-wieser', 'github-actions', 'leanprover-community-bot-assistant', 'mathlib4-dependent-issues-bot', 'urkud'] digama0
assignee:digama0
318-22566
10 months ago
318-22568
318 days ago
87-49908
87 days
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
317-81911
10 months ago
318-64834
318 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
317-81567
10 months 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
317-81244
10 months ago
612-67798
612 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
317-81204
10 months ago
623-11149
623 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
317-80835
10 months ago
848-52515
848 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
317-80823
10 months ago
870-75818
870 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
317-80817
10 months 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
317-80731
10 months 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
317-80727
10 months ago
546-42100
546 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
316-64381
10 months ago
323-6533
323 days ago
55-70108
55 days
23546 JovanGerb
author:JovanGerb
 feat(LinearAlgebra/AffineSpace/AffineSubspace): rename `AffineSubspace.mk'` to `Submodule.shift` In addition to renaming, I've refactored the code a bit: - `mem_mk'_iff_vsub_mem` was obsolete since it was the same as `mem_mk'`, so I removed it (this is due to a change in the definition I made recently) - I added a nonempty instance for `shift` - I added a simp lemma that `shift` isn't equal to `⊥` (the empty affine subspace). I need this for the next point. - Edit: I'll leave this for a later PR. ~I proved a simp lemma that a `shift` is parallel to a `shift` if and only if the linear subspaces are the same.~ - I renamed `mk'_eq` to `shift_direction_eq_self `. - I renamed `eq_or_eq_secondInter_of_mem_mk'_span_singleton_iff_mem` to `eq_or_eq_secondInter_iff_mem_of_mem_shift_span_singleton`. I think it is better to put the `of_mem_mk'_span_singleton` at the end of the name. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-euclidean-geometry 128/99 Mathlib/Algebra/Module/ZLattice/Basic.lean,Mathlib/Geometry/Euclidean/Basic.lean,Mathlib/Geometry/Euclidean/MongePoint.lean,Mathlib/Geometry/Euclidean/PerpBisector.lean,Mathlib/Geometry/Euclidean/Sphere/SecondInter.lean,Mathlib/Geometry/Euclidean/Sphere/Tangent.lean,Mathlib/LinearAlgebra/AffineSpace/AffineSubspace/Defs.lean 7 4 ['JovanGerb', 'github-actions', 'leanprover-community-bot-assistant'] nobody
316-55548
10 months ago
323-32581
323 days ago
26-22460
26 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
315-27846
10 months ago
584-51031
584 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
314-29807
10 months ago
391-54830
391 days ago
43-81252
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
312-25687
10 months ago
312-25687
312 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
311-47881
10 months ago
311-47881
311 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
309-73425
10 months ago
309-73425
309 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
308-49806
10 months 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
307-71490
10 months 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
307-65865
10 months 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
306-60958
10 months ago
315-40960
315 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
305-62200
10 months ago
551-55018
551 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
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 1 ['github-actions'] nobody
304-60102
10 months ago
304-59915
304 days ago
0-874
14 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
293-45766
9 months ago
293-45768
293 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
288-58392
9 months ago
690-21263
690 days ago
0-20
20 seconds
8740 digama0
author:digama0
 fix: improve `recall` impl / error reporting Simplifies the implementation of `recall`, fixing a bug [reported on Zulip](https://leanprover.zulipchat.com/#narrow/stream/113488-general/topic/.60recall.60.20strangeness/near/405076713) and also eliminating a use of `open private`. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict awaiting-author awaiting-CI t-meta 27/39 Mathlib/Tactic/Recall.lean 1 2 ['github-actions', 'leanprover-community-bot-assistant'] nobody
286-75653
9 months ago
837-45149
837 days ago
0-24848
6 hours
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
284-62333
9 months ago
284-63224
284 days ago
0-10787
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
284-9373
9 months ago
481-56714
481 days ago
87-65922
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
284-9373
9 months ago
571-70353
571 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
283-17719
9 months ago
666-45372
666 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
282-69408
9 months ago
344-61086
344 days ago
0-7729
2 hours
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
282-68593
9 months ago
282-68595
282 days ago
6-39812
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
281-85260
9 months ago
398-35139
398 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
276-10272
9 months ago
414-48253
414 days ago
27-62333
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
273-51752
9 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
270-74889
8 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
270-60334
8 months ago
502-58233
502 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
270-60332
8 months ago
502-59876
502 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
270-60331
8 months ago
502-60518
502 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
267-42622
8 months ago
505-68838
505 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
262-81344
8 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
262-77318
8 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
255-8195
8 months ago
526-42238
526 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
255-7689
8 months ago
367-58261
367 days ago
0-1295
21 minutes
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
255-7283
8 months ago
255-7283
255 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
255-7282
8 months ago
255-7282
255 days ago
40-60910
40 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
255-7036
8 months ago
255-7037
255 days ago
45-4562
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
255-7033
8 months ago
287-68550
287 days ago
6-44784
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
255-7018
8 months ago
271-44741
271 days ago
10-56011
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
254-62118
8 months ago
254-61025
254 days ago
32-74826
32 days
24405 mcdoll
author:mcdoll
 refactor(Topology/Algebra/Module/WeakDual): Clean up - Move `Dual` and `dualPairing` lower in the import-hierachy - deduplicate `dualPairing` - Make `WeakDual` and `WeakSpace` reducible --- New version of #11500 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-topology large-import 146/162 Mathlib.lean,Mathlib/Analysis/Fourier/RiemannLebesgueLemma.lean,Mathlib/Analysis/InnerProductSpace/Adjoint.lean,Mathlib/Analysis/InnerProductSpace/Dual.lean,Mathlib/Analysis/LocallyConvex/WeakSpace.lean,Mathlib/Analysis/Normed/Module/Dual.lean,Mathlib/Analysis/Normed/Module/WeakDual.lean,Mathlib/Analysis/VonNeumannAlgebra/Basic.lean,Mathlib/MeasureTheory/Function/AEEqOfIntegral.lean,Mathlib/MeasureTheory/Measure/FiniteMeasure.lean,Mathlib/Topology/Algebra/Module/Dual.lean,Mathlib/Topology/Algebra/Module/WeakDual.lean,docs/overview.yaml,docs/undergrad.yaml 14 2 ['github-actions', 'leanprover-community-bot-assistant'] nobody
253-58553
8 months ago
253-58554
253 days ago
69-52361
69 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
253-10314
8 months ago
253-29521
253 days ago
3-72995
3 days
10541 xgenereux
author:xgenereux
 feat(Algebra/SkewMonoidAlgebra/Basic): add SkewMonoidAlgebra # Skew Monoid algebras This file presents a skewed version of `Mathlib.Algebra.MonoidAlgebra.Basic`. ## Definition We define `SkewMonoidAlgebra k G := G →₀ k` attached with a skewed convolution product. Here, the product of two elements `f g : SkewMonoidAlgebra k G` is the finitely supported function whose value at `a` is the sum of `f x * (x • g y)` over all pairs `x, y` such that `x * y = a`. This will be used in a later PR to define skew polynomial rings. Co-authored-by: María Inés de Frutos Fernández <[mariaines.dff@gmail.com](mailto:mariaines.dff@gmail.com)> --- - [x] depends on: #15878 - [x] depends on: #19084 - [x] depends on: #22078 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict WIP t-algebra new-contributor
label:t-algebra$
 1624/0 Mathlib.lean,Mathlib/Algebra/Group/InjSurj.lean,Mathlib/Algebra/SkewMonoidAlgebra/Basic.lean,Mathlib/Algebra/SkewMonoidAlgebra/Lift.lean 4 105 ['AntoineChambert-Loir', 'YaelDillies', 'eric-wieser', 'fpvandoorn', 'github-actions', 'mariainesdff', 'mathlib4-dependent-issues-bot', 'mattrobball', 'xgenereux'] AntoineChambert-Loir
assignee:AntoineChambert-Loir
250-62511
8 months ago
577-66077
577 days ago
179-14511
179 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
244-63320
8 months ago
277-44675
277 days ago
3-31703
3 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
242-69781
7 months ago
385-69286
385 days ago
31-68555
31 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
237-27860
7 months ago
243-80027
243 days ago
45-38763
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
236-71146
7 months ago
256-56862
256 days ago
0-10699
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
234-15328
7 months ago
313-27433
313 days ago
0-328
5 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
230-55319
7 months ago
579-58772
579 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
228-65573
7 months ago
765-58499
765 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
228-63216
7 months ago
274-48307
274 days ago
0-1208
20 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
228-48459
7 months ago
448-29560
448 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
228-18031
7 months ago
299-65071
299 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 21/9 Mathlib/Tactic/Lift.lean,MathlibTest/lift.lean 2 8 ['JovanGerb', 'adomani', 'eric-wieser', 'github-actions', 'leanprover-community-bot-assistant', 'mathlib4-dependent-issues-bot', 'vihdzp'] JovanGerb
assignee:JovanGerb
226-13942
7 months ago
226-60842
226 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
224-71764
7 months ago
255-7033
255 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
223-73906
7 months ago
368-24712
368 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
223-73858
7 months ago
368-24711
368 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
223-73851
7 months ago
358-19744
358 days ago
10-44563
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
223-73807
7 months ago
399-72841
399 days ago
32-79324
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
223-73792
7 months ago
428-49726
428 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
223-73785
7 months ago
496-82354
496 days ago
0-1609
26 minutes
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
223-73779
7 months ago
485-9272
485 days ago
13-6188
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
223-73723
7 months ago
403-58283
403 days ago
0-19114
5 hours
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
223-73515
7 months ago
436-74854
436 days ago
193-74502
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
223-18066
7 months ago
526-61173
526 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
218-77326
7 months ago
419-52141
419 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
218-70293
7 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
217-48570
7 months ago
307-29929
307 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
215-69473
7 months ago
215-69474
215 days ago
32-70098
32 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 11 ['faenuccio', 'ggranberry', 'github-actions'] faenuccio
assignee:faenuccio
215-69196
7 months ago
363-54078
363 days ago
0-1302
21 minutes
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
215-24269
7 months ago
215-24269
215 days ago
71-28496
71 days
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. --- - [ ] 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', 'leanprover-community-mathlib4-bot', 'mattrobball'] nobody
213-47619
7 months ago
611-45571
611 days ago
7-77799
7 days
14583 lecopivo
author:lecopivo
 fix: make concrete cycle notation local fix: make c[...] notation for concrete cycles local --- The notation for concrete cycles prevents you using `c[i]` notation for `c : Array _` This currently does not work ``` import Mathlib variable (c : Array Nat) (i : Fin c.size) #check c[i] -- breaks because of notation for concrete cycles ``` This PR just marks it as local to prevent this issue. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict awaiting-author 1/1 Mathlib/GroupTheory/Perm/Cycle/Concrete.lean 1 3 ['eric-wieser', 'github-actions', 'mathlib4-merge-conflict-bot'] nobody
210-77838
6 months ago
615-28004
615 days ago
0-12793
3 hours
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
210-67824
6 months ago
636-80626
636 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
209-23388
6 months ago
307-54837
307 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
207-38930
6 months ago
430-9489
430 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
207-15561
6 months ago
907-54446
907 days ago
0-84
1 minute
13795 astrainfinita
author:astrainfinita
 perf(Algebra/{Group, GroupWithZero, Ring}/InjSurj): reduce everything --- - [ ] depends on: #15192 - [ ] depends on: #15476 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-algebra
label:t-algebra$
 340/194 Mathlib/Algebra/Equiv/TransferInstance.lean,Mathlib/Algebra/Group/InjSurj.lean,Mathlib/Algebra/GroupWithZero/Action/Defs.lean,Mathlib/Algebra/GroupWithZero/Action/End.lean,Mathlib/Algebra/GroupWithZero/InjSurj.lean,Mathlib/Algebra/Module/Defs.lean,Mathlib/Algebra/Module/RingHom.lean,Mathlib/Algebra/Ring/InjSurj.lean,scripts/noshake.json 9 37 ['MichaelStollBayreuth', 'astrainfinita', 'eric-wieser', 'github-actions', 'leanprover-bot', 'leanprover-community-bot-assistant', 'mathlib4-dependent-issues-bot', 'mattrobball'] nobody
206-62946
6 months ago
335-77951
335 days ago
47-81764
47 days
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
202-76441
6 months ago
224-58418
224 days ago
85-42087
85 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
196-5150
6 months ago
294-62997
294 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
187-27098
6 months ago
666-66030
666 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
187-10740
6 months ago
191-19698
191 days ago
0-22091
6 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
185-31081
6 months ago
378-32662
378 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 bench-after-CI 9/1 Mathlib/Analysis/Complex/Basic.lean 1 1 ['github-actions'] nobody
184-71940
6 months ago
184-71919
184 days ago
0-104
1 minute
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
183-46282
6 months ago
199-78091
199 days ago
100-20975
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
183-46281
6 months ago
209-47245
209 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
182-58634
6 months ago
211-4910
211 days ago
0-1522
25 minutes
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
180-31739
5 months ago
unknown
0-0
0 seconds
25480 ocfnash
author:ocfnash
 feat: define a concrete model of the `𝔤₂` root system This is a bit of an experiment to test API but it should also make it easier to prove some properties of `𝔤₂`. --- - [x] depends on: #25477 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict WIP t-algebra large-import
label:t-algebra$
 120/15 Mathlib/LinearAlgebra/RootSystem/Defs.lean,Mathlib/LinearAlgebra/RootSystem/Finite/G2.lean,Mathlib/LinearAlgebra/RootSystem/Reduced.lean 3 9 ['eric-wieser', 'github-actions', 'leanprover-community-bot-assistant', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot', 'ocfnash'] nobody
173-83504
5 months ago
284-67612
284 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
171-56725
5 months ago
252-56662
252 days ago
73-13048
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
163-51149
5 months ago
334-23522
334 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
157-47069
5 months ago
547-74618
547 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
151-38437
5 months ago
172-70527
172 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
149-80059
4 months ago
468-58555
468 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
146-20851
4 months ago
146-20851
146 days ago
148-3338
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
145-10701
4 months ago
309-78222
309 days ago
0-47835
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
133-55550
4 months ago
209-78446
209 days ago
47-20776
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
133-37951
4 months ago
180-13453
180 days ago
15-4939
15 days
14752 AntoineChambert-Loir
author:AntoineChambert-Loir
 fix(Topology/Algebra/Valued): repair definition of Valued Following a [discussion on Zulip](https://leanprover.zulipchat.com/#narrow/stream/116395-maths/topic/Question.20about.20.60Valued.2Eis_topological_valuation.60), we modify the definition of the field `is_topological_valuation` of `Valued` insisting that the element $\gamma$ showing up there is in the subgroup generated by the image of the valuation map. Co-authored-by: @faenuccio - [x] depends on: #25496 merge-conflict WIP t-topology t-algebra
label:t-algebra$
 1166/301 Mathlib.lean,Mathlib/Algebra/GroupWithZero/Range.lean,Mathlib/NumberTheory/NumberField/FinitePlaces.lean,Mathlib/RingTheory/LaurentSeries.lean,Mathlib/RingTheory/Valuation/Basic.lean,Mathlib/RingTheory/Valuation/RankOne.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/UniformSpace/AbstractCompletion.lean,docs/references.bib 12 28 ['AntoineChambert-Loir', 'faenuccio', 'github-actions', 'jcommelin', 'kbuzzard', 'leanprover-community-bot-assistant', 'mathlib4-dependent-issues-bot', 'riccardobrasca'] nobody
126-36550
4 months ago
284-47431
284 days ago
1-33784
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
119-27894
3 months ago
538-55282
538 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
119-10868
3 months ago
706-55434
706 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
118-61640
3 months ago
621-69632
621 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
118-44135
3 months ago
464-7665
464 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
117-81994
3 months ago
933-18456
933 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
117-81993
3 months ago
977-61654
977 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
117-81992
3 months ago
801-20487
801 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
117-81989
3 months ago
621-69620
621 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
117-81864
3 months ago
755-60313
755 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
117-81863
3 months ago
787-78034
787 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
117-81859
3 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
117-81858
3 months ago
566-57493
566 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
117-81857
3 months ago
648-50385
648 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
117-81733
3 months ago
580-29839
580 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
117-81730
3 months ago
648-67108
648 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
117-81728
3 months ago
567-73814
567 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
117-81726
3 months ago
538-56862
538 days ago
26-40037
26 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
117-81603
3 months ago
609-47157
609 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
117-81601
3 months ago
607-29202
607 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
117-81599
3 months ago
604-41063
604 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
117-81598
3 months ago
593-66940
593 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
117-81597
3 months ago
593-47828
593 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
117-81593
3 months ago
436-30686
436 days ago
78-5771
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
117-81442
3 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
117-81439
3 months ago
420-43999
420 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
117-81437
3 months ago
490-52771
490 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
117-81436
3 months ago
437-61666
437 days ago
43-17770
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
117-81435
3 months ago
429-52406
429 days ago
49-5112
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
117-81434
3 months ago
476-72610
476 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
117-81306
3 months ago
452-18127
452 days ago
0-334
5 minutes
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
117-81304
3 months ago
413-55088
413 days ago
23-30991
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
117-81303
3 months ago
315-27832
315 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
117-81301
3 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
117-81300
3 months ago
405-54988
405 days ago
7-42229
7 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
117-81299
3 months ago
387-14658
387 days ago
27-38491
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
117-81297
3 months ago
418-49858
418 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
117-81295
3 months ago
336-83108
336 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
117-81293
3 months ago
410-31271
410 days ago
0-668
11 minutes
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
117-81289
3 months ago
343-9131
343 days ago
54-54882
54 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
117-81287
3 months ago
349-75962
349 days ago
46-53123
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
117-81163
3 months ago
344-65118
344 days ago
50-8745
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
117-81157
3 months ago
364-75170
364 days ago
20-81771
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
117-81153
3 months ago
196-64434
196 days ago
158-38024
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
117-81151
3 months ago
386-11317
386 days ago
0-141
2 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
117-81150
3 months ago
386-11045
386 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
117-81148
3 months ago
384-28750
384 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
117-81141
3 months ago
117-81142
117 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
117-81135
3 months ago
340-63649
340 days ago
28-59574
28 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
117-81133
3 months ago
346-59281
346 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
117-81131
3 months ago
292-8002
292 days ago
71-48538
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
117-81130
3 months ago
193-18537
193 days ago
0-4401
1 hour
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
117-81124
3 months ago
357-26855
357 days ago
0-21
21 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
117-81122
3 months ago
200-43494
200 days ago
65-54983
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
117-81120
3 months ago
336-35673
336 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
117-81119
3 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
117-81117
3 months ago
219-5582
219 days ago
124-78303
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
117-80982
3 months ago
203-79563
203 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
117-80977
3 months ago
284-12721
284 days ago
0-20349
5 hours
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
117-80969
3 months ago
117-80970
117 days ago
177-42245
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
117-80964
3 months ago
168-14835
168 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
117-80837
3 months ago
281-65634
281 days ago
0-820
13 minutes
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
117-80470
3 months ago
253-82505
253 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
117-80136
3 months ago
197-24042
197 days ago
18-54732
18 days
21915 YaelDillies
author:YaelDillies
 feat: simproc for `Int.divisorsAntidiag` Co-authored-by: Paul Lezeau --- - [x] depends on: #21912 - [x] depends on: #21991 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) WIP t-meta 75/0 Mathlib.lean,Mathlib/Tactic.lean,Mathlib/Tactic/Simproc/DivisorsAntidiag.lean 3 9 ['YaelDillies', 'eric-wieser', 'github-actions', 'leanprover-community-bot-assistant', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
117-68120
3 months ago
394-50101
394 days ago
0-56
56 seconds
15443 YaelDillies
author:YaelDillies
 feat: Marcinkiewicz-Zygmund inequality Prove the Marcinkiewicz-Zygmund inequality. The Marcinkiewicz-Zygmund inequality states that, if `X₁, ..., Xₐ ∈ L^p` are independent random variables of mean zero valued in some inner product space, then the `L^p`-norm of `X₁ + ... + Xₐ` is at most `Cₚ` times the `L^(p/2)`-norm of `|X₁|² + ... + |Xₐ|²`, where `Cₚ` is a constant depending on `p` alone. From LeanAPAP Co-authored-by: Bhavik Mehta --- - [x] depends on: #15832 - [x] depends on: #21033 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) WIP t-analysis 189/0 Mathlib.lean,Mathlib/Probability/MarcinkiewiczZygmund.lean 2 40 ['Parcly-Taxel', 'YaelDillies', 'b-mehta', 'github-actions', 'hrmacbeth', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot', 'sgouezel'] nobody
117-67776
3 months ago
441-46683
441 days ago
89-28229
89 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 760/625 Archive/Imo/Imo1988Q6.lean,Archive/Imo/Imo1997Q3.lean,Archive/Imo/Imo2024Q5.lean,Archive/MiuLanguage/Basic.lean,Archive/Wiedijk100Theorems/BallotProblem.lean,Cache/Requests.lean,Counterexamples/PolynomialIsDomain.lean,Mathlib.lean,Mathlib/Algebra/Algebra/NonUnitalSubalgebra.lean,Mathlib/Algebra/Algebra/Subalgebra/Basic.lean,Mathlib/Algebra/Algebra/Subalgebra/Lattice.lean,Mathlib/Algebra/BigOperators/Fin.lean,Mathlib/Algebra/BigOperators/Ring/Finset.lean,Mathlib/Algebra/Category/Ring/Constructions.lean,Mathlib/Algebra/CharP/Subring.lean,Mathlib/Algebra/ContinuedFractions/Computation/Approximations.lean,Mathlib/Algebra/ContinuedFractions/ConvergentsEquiv.lean,Mathlib/Algebra/DirectSum/Internal.lean,Mathlib/Algebra/Group/Fin/Basic.lean,Mathlib/Algebra/Group/Int/Even.lean,Mathlib/Algebra/Group/Submonoid/Membership.lean,Mathlib/Algebra/Group/Submonoid/Operations.lean,Mathlib/Algebra/Group/Subsemigroup/Operations.lean,Mathlib/Algebra/Homology/Augment.lean,Mathlib/Algebra/Homology/Embedding/Connect.lean,Mathlib/Algebra/Lie/LieTheorem.lean,Mathlib/Algebra/Lie/Nilpotent.lean,Mathlib/Algebra/Lie/Weights/Chain.lean,Mathlib/Algebra/Lie/Weights/RootSystem.lean,Mathlib/Algebra/Module/Submodule/Map.lean,Mathlib/Algebra/Module/ZLattice/Basic.lean,Mathlib/Algebra/Order/Archimedean/Basic.lean,Mathlib/Algebra/Order/CauSeq/Basic.lean,Mathlib/Algebra/Order/Field/Power.lean,Mathlib/Algebra/Order/Group/Unbundled/Int.lean,Mathlib/Algebra/Order/Module/HahnEmbedding.lean,Mathlib/Algebra/Order/Ring/Unbundled/Rat.lean,Mathlib/Algebra/Polynomial/CoeffList.lean,Mathlib/Algebra/Polynomial/Degree/CardPowDegree.lean,Mathlib/Algebra/Polynomial/Degree/IsMonicOfDegree.lean,Mathlib/Algebra/Polynomial/Derivative.lean,Mathlib/Algebra/Polynomial/Div.lean,Mathlib/Algebra/Polynomial/Factors.lean,Mathlib/Algebra/Polynomial/Homogenize.lean,Mathlib/Algebra/Polynomial/Laurent.lean,Mathlib/Algebra/Polynomial/RingDivision.lean,Mathlib/Algebra/Polynomial/SumIteratedDerivative.lean,Mathlib/Algebra/Ring/Action/Invariant.lean,Mathlib/Algebra/Ring/Ext.lean,Mathlib/Algebra/Ring/Periodic.lean,Mathlib/Algebra/Ring/Subsemiring/Defs.lean,Mathlib/Algebra/Star/Module.lean,Mathlib/Algebra/Star/NonUnitalSubalgebra.lean,Mathlib/Algebra/Star/Subalgebra.lean,Mathlib/AlgebraicGeometry/Modules/Tilde.lean,Mathlib/AlgebraicGeometry/SpreadingOut.lean,Mathlib/AlgebraicGeometry/StructureSheaf.lean,Mathlib/AlgebraicTopology/DoldKan/Degeneracies.lean,Mathlib/AlgebraicTopology/DoldKan/Faces.lean,Mathlib/AlgebraicTopology/Quasicategory/Basic.lean,Mathlib/AlgebraicTopology/SimplexCategory/Basic.lean,Mathlib/AlgebraicTopology/SimplicialSet/Horn.lean,Mathlib/Analysis/Asymptotics/Theta.lean,Mathlib/Analysis/Calculus/ContDiff/FaaDiBruno.lean,Mathlib/Analysis/Complex/UpperHalfPlane/Basic.lean,Mathlib/Analysis/Convex/Between.lean,Mathlib/Analysis/Convex/SpecificFunctions/Deriv.lean,Mathlib/Analysis/Convex/StdSimplex.lean,Mathlib/Analysis/Distribution/TemperateGrowth.lean,Mathlib/Analysis/InnerProductSpace/Projection/Basic.lean,Mathlib/Analysis/Matrix/Spectrum.lean,Mathlib/Analysis/Meromorphic/Basic.lean,Mathlib/Analysis/Normed/Affine/Simplex.lean,Mathlib/Analysis/Normed/Field/UnitBall.lean,Mathlib/Analysis/Normed/Group/SemiNormedGrp/Kernels.lean,Mathlib/Analysis/Normed/Module/Ball/RadialEquiv.lean,Mathlib/Analysis/Normed/Ring/Ultra.lean,Mathlib/Analysis/NormedSpace/MStructure.lean,Mathlib/Analysis/SpecialFunctions/Gamma/Beta.lean,Mathlib/Analysis/SpecialFunctions/Log/Basic.lean,Mathlib/Analysis/SpecialFunctions/Pow/NNReal.lean,Mathlib/Analysis/SpecialFunctions/Pow/Real.lean,Mathlib/CategoryTheory/ConcreteCategory/UnbundledHom.lean,Mathlib/CategoryTheory/Groupoid/Subgroupoid.lean,Mathlib/Combinatorics/Additive/AP/Three/Defs.lean,Mathlib/Combinatorics/Additive/FreimanHom.lean,Mathlib/Combinatorics/Quiver/Arborescence.lean,Mathlib/Combinatorics/Schnirelmann.lean,Mathlib/Combinatorics/SimpleGraph/Extremal/Turan.lean,Mathlib/Combinatorics/SimpleGraph/FiveWheelLike.lean,Mathlib/Combinatorics/SimpleGraph/Hamiltonian.lean,Mathlib/Combinatorics/SimpleGraph/Trails.lean,Mathlib/Computability/Primrec.lean,Mathlib/Control/Random.lean,Mathlib/Data/Char.lean,Mathlib/Data/ENNReal/Basic.lean,Mathlib/Data/ENNReal/Inv.lean,Mathlib/Data/FP/Basic.lean,Mathlib/Data/Fin/Basic.lean,Mathlib/Data/Fin/SuccPred.lean 297 5 ['JovanGerb', 'github-actions', 'leanprover-bot', 'mathlib4-merge-conflict-bot'] nobody
117-53988
3 months ago
123-66219
123 days ago
0-88
1 minute
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
117-53313
3 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
117-53305
3 months ago
930-22018
930 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
117-53300
3 months ago
787-58053
787 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
117-53268
3 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
117-53253
3 months ago
801-58231
801 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
117-53247
3 months ago
714-45553
714 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
117-53241
3 months ago
621-76050
621 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
117-53234
3 months ago
621-76033
621 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
117-53211
3 months ago
768-21955
768 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
117-53203
3 months ago
747-20648
747 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
117-53169
3 months ago
592-73451
592 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
117-53162
3 months ago
592-73326
592 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
117-53147
3 months ago
603-19294
603 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
117-53142
3 months ago
679-61193
679 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
117-53138
3 months ago
689-49418
689 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
117-53109
3 months ago
620-32590
620 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
117-53098
3 months ago
612-39105
612 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
117-53063
3 months ago
518-43523
518 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
117-53056
3 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
117-53050
3 months ago
480-59929
480 days ago
15-38473
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
117-53041
3 months ago
492-77393
492 days ago
0-722
12 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
117-53036
3 months ago
384-63996
384 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
117-53026
3 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
117-52987
3 months ago
453-70236
453 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
117-52960
3 months ago
410-31774
410 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
117-52948
3 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
117-52843
3 months ago
329-51778
329 days ago
8-27909
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
117-52839
3 months ago
200-80627
200 days ago
117-82649
117 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
117-52823
3 months ago
280-83278
280 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
117-52816
3 months ago
280-83240
280 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
112-65581
3 months ago
117-80977
117 days ago
36-953
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
112-12970
3 months ago
334-21720
334 days ago
2-85335
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
109-68389
3 months ago
261-21867
261 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
101-35490
3 months ago
283-61834
283 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 0/4 Mathlib/RingTheory/Kaehler/JacobiZariski.lean 1 13 ['chrisflav', 'erdOne', 'github-actions', 'leanprover-radar', 'mattrobball'] nobody
100-59113
3 months ago
100-59113
100 days ago
1-301
1 day
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 - [x] depends on: #18534 - [x] depends on: #18527 - [x] depends on: #18440 - [ ] 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
99-56350
3 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
96-60880
3 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', 'leanprover-community-mathlib4-bot'] nobody
95-54650
3 months ago
942-38992
942 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
88-78815
2 months ago
402-30985
402 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 bench-after-CI merge-conflict 2/0 Mathlib/Algebra/Quotient.lean 1 2 ['github-actions', 'mathlib4-merge-conflict-bot'] nobody
87-43212
2 months ago
403-66042
403 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
80-40631
2 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
80-40528
2 months ago
1010-25258
1010 days ago
0-753
12 minutes
6042 MohanadAhmed
author:MohanadAhmed
 feat(LinearAlgebra/Matrix/SVD): Singular Value Decomposition of R or C Matrices This file provides proves the SVD theorem which decomposes a real/complex matrix into left eigenvectors, singular values block diagonal matrix and right eigenvectors. Any matrix A (M × N) with rank r = A.rank and with elements in ℝ or ℂ fields can be decompsed into the product of three matrices: $$A = USV$$ * The three matrices are defined as - $U$: an M × M matrix containing the left eigenvectors of the matrix - $S$: an M × N matrix with an r × r block in the upper left corner with nonzero singular values - $V$: an N × N matrix containing the right eigenvectors of the matrix Note that * $S$ is a block matrix $S = [S₁₁, S₁₂; S₂₁, S₂₂]$ with - $S₁₁$: a diagonal r × r matrix and - $S₁₂$ : r × (N - r) zero matrix, S₂₁ : (M - r) × r zero matrix and - $S₂₂$: (M - r) × (N - r) zero matrix * $U$ is a block column matrix U = [U₁ U₂] with - $U₁$ : a M × r containing left eigenvectors with nonzero singular values. - $U₂$ : a M × (M - r) containing left eigenvectors with zero singular values. * $V$ is a block column matrix V = [V₁ V₂] with - $V₁$ : a N × r containing right eigenvectors with nonzero singular values. - $V₂$ : a M × (M - r) containing right eigenvectors with zero singular values. Since in mathlib the eigenvalues of hermitian matrices are defined in an "arbitrary" undetermined order, we begin by partition the singular values into zero and non-zero values. We partition the corresponding eigenvectors from AᴴA and AAᴴ using similar rearrangements. These are included in `SVD.svdReindex`. The basic API for Column and Row partitioned matrices is from `ColumnRowPartitioned`. We then proceed to transfer some of the lemmas we need about eigenvector matrices (for example that they are unitary: i.e. inverse is conjugate transpose.). Note that since invertibility in mathlib is defined for square matrices while our matrices are partitioned i.e. N × (N₁ ⊕ N₂) and N ≃ (N ⊕ N₂), Lean cannot apply the Invertible definition. We workaround this were necessary. Lemma `reduced_spectral_theorem` (`reduced_spectral_theorem'`) shows that AᴴA and AAᴴ, can be reduced to products containing only the non-zero singular eigenvectors. This is later used in proving the main SVD theroem. A few lemmas are provided about the invertibility of the non-zero singular values matrix: `svdσ_inv`, `σ_inv_μ_σ_inv_eq_one`, `IsUnit_det_svdσ`, `IsUnit_det_svdσ_mapK` and `svdσ_inv_mapK`. To make relating left eigenvectors to right eigenvectors easier we define U₁ = AV₁σ⁻¹ while U₂ is obtained from the eigenvectors of (AAᴴ). This avoid a lengthy reindexing operation with many proofs. The vectors in U₂ have no such issue since they are multiplied by zero singular values anyway. Co-authored-by: Mohanad Ahmed --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) please-adopt WIP t-algebra merge-conflict
label:t-algebra$
 588/0 Mathlib.lean,Mathlib/LinearAlgebra/Matrix/SVD/Defs.lean,Mathlib/LinearAlgebra/Matrix/SVD/Reindex.lean 3 116 ['MohanadAhmed', 'Vierkantor', 'alexjbest', 'eric-wieser', 'j-loreaux', 'jcommelin', 'mathlib4-merge-conflict-bot', 'sgouezel', 'vihdzp'] nobody
80-40158
2 months ago
762-40446
762 days ago
197-21527
197 days
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
80-36503
2 months ago
1023-56344
1023 days ago
8-43930
8 days
25481 kbuzzard
author:kbuzzard
 chore: refactor Algebra.TensorProduct.rightAlgebra 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/) t-algebra
label:t-algebra$
 29/6 Mathlib/RingTheory/TensorProduct/Basic.lean 1 8 ['adomani', 'github-actions', 'kbuzzard', 'leanprover-bot', 'mathlib-bors', 'mathlib4-merge-conflict-bot'] adomani
assignee:adomani
78-51748
2 months ago
227-60899
227 days ago
56-85445
56 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
78-14919
2 months ago
609-30323
609 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
78-2327
2 months ago
184-26385
184 days ago
0-6833
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
76-31451
2 months ago
313-38393
313 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
74-32488
2 months ago
74-45802
74 days ago
0-121
2 minutes
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
73-17342
2 months ago
200-47855
200 days ago
43-1605
43 days
22657 Xmask19
author:Xmask19
 feat: a graph is maximally acyclic iff it is a tree --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-combinatorics new-contributor 86/0 Mathlib/Combinatorics/SimpleGraph/Acyclic.lean 1 8 ['Rida-Hamadani', 'SnirBroshi', 'b-mehta', 'github-actions', 'grunweg', 'mathlib4-merge-conflict-bot'] b-mehta
assignee:b-mehta
72-26829
2 months ago
342-56148
342 days ago
21-77121
21 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
71-29319
2 months ago
406-25842
406 days ago
0-2312
38 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
70-36734
2 months ago
517-83971
517 days ago
9-73631
9 days
13740 YaelDillies
author:YaelDillies
 feat: more robust ae notation Make sure that, when `μ : FiniteMeasure Ω`, `f =ᵐ[μ] g` elaborates to `f =ᵐ[↑μ] g` instead of complaining about `OuterMeasureClass (FiniteMeasure Ω) (Set Ω) ℝ≥0∞` not existing. [Zulip](https://leanprover.zulipchat.com/#narrow/stream/287929-mathlib4/topic/ae.20of.20a.20finite.20measure) --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-meta t-measure-probability awaiting-author 67/8 Mathlib/MeasureTheory/Integral/Bochner/L1.lean,Mathlib/MeasureTheory/Measure/Decomposition/IntegralRNDeriv.lean,Mathlib/MeasureTheory/Measure/MeasureSpaceDef.lean,Mathlib/MeasureTheory/OuterMeasure/AE.lean,Mathlib/MeasureTheory/OuterMeasure/BorelCantelli.lean,Mathlib/Probability/Notation.lean 6 41 ['YaelDillies', 'eric-wieser', 'github-actions', 'leanprover-community-bot-assistant', 'thorimur', 'urkud'] RemyDegenne and thorimur
assignee:RemyDegenne assignee:thorimur
69-35855
2 months ago
69-35907
69 days ago
62-16320
62 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
67-61364
2 months ago
337-36409
337 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
65-79089
2 months ago
69-44617
69 days ago
0-3399
56 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 ['leanprover-community-mathlib4-bot', 'urkud'] nobody
64-7135
2 months ago
648-67603
648 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
64-7042
2 months ago
668-62867
668 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 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 23 ['eric-wieser', 'gio256', 'github-actions', 'joneugster', 'kim-em', 'leanprover-community-bot-assistant', 'mathlib4-dependent-issues-bot'] joneugster
assignee:joneugster
59-56393
2 months ago
239-33533
239 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
59-52336
2 months ago
129-58808
129 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
59-42266
2 months ago
543-6135
543 days ago
7-13967
7 days
34131 Ruben-VandeVelde
author:Ruben-VandeVelde
 fix: update create_deprecated_modules.lean --- This is a wip; I'm hoping someone can pick it up and make sure CI builds it going forward. @adomani @kim-em any takers? [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) please-adopt WIP CI 26/22 scripts/create_deprecated_modules.lean 1 2 ['adomani', 'github-actions'] nobody
55-78800
1 month ago
56-67280
56 days ago
0-1
1 second
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
54-77817
1 month ago
54-76167
54 days ago
0-1996
33 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 58/19 Mathlib/Tactic/Linter/TextBased.lean,scripts/lint-style.lean 2 20 ['Vierkantor', 'adomani', 'github-actions', 'grunweg', 'joneugster', 'leanprover-community-bot-assistant', 'mathlib4-dependent-issues-bot'] joneugster
assignee:joneugster
52-76128
1 month ago
304-50461
304 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', 'leanprover-community-mathlib4-bot', 'urkud'] nobody
49-33709
1 month ago
670-34703
670 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
48-20587
1 month ago
unknown
0-0
0 seconds
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 29 ['MrBrain295', 'Parcly-Taxel', 'Rida-Hamadani', 'github-actions', 'lambda-fairy', 'leanprover-community-bot-assistant'] kmill
assignee:kmill
45-9974
1 month ago
255-8198
255 days ago
72-50365
72 days
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
44-29774
1 month ago
335-21006
335 days ago
0-1017
16 minutes
24000 YaelDillies
author:YaelDillies
 feat: correspondence between affine group schemes and Hopf algebras Construct `Spec` as a functor from `R`-Hopf algebras to group schemes over `Spec R`, show it is full and faithful and has affine group schemes as essential image. From Toric, FLT Co-authored-by: Andrew Yang Co-authored-by: Michał Mrugała Co-authored-by: Christian Merten --- - [ ] depends on: #34675 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebraic-geometry toric FLT blocked-by-other-PR 127/0 Mathlib/AlgebraicGeometry/GroupScheme/HopfAffine.lean 1 4 ['YaelDillies', 'github-actions', 'kbuzzard', 'mathlib4-dependent-issues-bot'] nobody
43-68554
1 month ago
337-64687
337 days ago
0-1
1 second
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
43-60925
1 month ago
255-7024
255 days ago
29-66856
29 days
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
43-60868
1 month ago
60-75553
60 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
43-60612
1 month ago
136-42627
136 days ago
0-64677
17 hours
19860 YaelDillies
author:YaelDillies
 refactor: review the `simps` projections of `OneHom`, `MulHom`, `MonoidHom` Make `simps` generate `coe_concreteHom` rather than`concreteHom_apply`. From FLT --- In fact, I would love to have both the `coe_` and `_apply` projections simultaneously and also to not have to specify ` simps (config := .asFn))` every single time we want to generate the `coe_` projection, but `simps ` seems to not be able to do that? cc @fpvandoorn I must say, after four years of working on mathlib, I still don't understand how one is supposed to use `simps`. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) WIP t-algebra
label:t-algebra$
 100/123 Mathlib/Algebra/BigOperators/Group/Multiset/Basic.lean,Mathlib/Algebra/Group/Hom/Defs.lean,Mathlib/Algebra/Group/Subgroup/Defs.lean,Mathlib/Algebra/Group/Submonoid/Operations.lean,Mathlib/Algebra/Group/WithOne/Basic.lean,Mathlib/Algebra/GroupWithZero/WithZero.lean,Mathlib/Algebra/Module/End.lean,Mathlib/GroupTheory/NoncommCoprod.lean 8 12 ['fpvandoorn', 'github-actions', 'leanprover-community-bot-assistant', 'mathlib4-merge-conflict-bot'] nobody
40-52420
1 month ago
461-68983
461 days ago
0-17
17 seconds
21031 YaelDillies
author:YaelDillies
 chore: get rid of generic hom coercions --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) WIP 166/161 Mathlib/Algebra/Group/Equiv/Basic.lean,Mathlib/Algebra/Group/Equiv/Defs.lean,Mathlib/Algebra/Group/Hom/Defs.lean,Mathlib/Algebra/Group/Subgroup/Map.lean,Mathlib/Algebra/Group/Units/Hom.lean,Mathlib/Algebra/GroupWithZero/Hom.lean,Mathlib/Algebra/Order/Hom/Monoid.lean,Mathlib/Algebra/Ring/Hom/Defs.lean,Mathlib/Logic/Equiv/Defs.lean,Mathlib/Order/Hom/Basic.lean,Mathlib/Order/RelIso/Basic.lean,Mathlib/RingTheory/Valuation/Basic.lean 12 18 ['Vierkantor', 'YaelDillies', 'github-actions', 'leanprover-community-bot-assistant', 'mathlib-merge-conflicts', 'mathlib4-merge-conflict-bot', 'urkud'] Vierkantor
assignee:Vierkantor
40-52333
1 month ago
416-36225
416 days ago
0-17
17 seconds
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
35-73828
1 month ago
255-10669
255 days ago
52-61657
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
34-66409
1 month ago
475-54677
475 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
34-33307
1 month ago
280-83265
280 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
32-41848
1 month ago
32-41849
32 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
30-10537
1 month ago
363-73437
363 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
30-10537
1 month ago
360-76428
360 days ago
0-67928
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
30-10536
1 month ago
361-57102
361 days ago
0-801
13 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
29-80008
1 month ago
437-67524
437 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
29-57395
1 month ago
678-56595
678 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
29-57223
1 month ago
unknown
0-0
0 seconds
16215 adomasbaliuka
author:adomasbaliuka
 feat(Tactic/Linter): lint unwanted unicode Add a text-based style linter that checks all unicode characters. - Only allow whitelisted characters, with a suggestion to add the flagged character to the whitelist - Some characters are specified to use emoji-variant or text-variant. The linter ensures these variant-selectors only appear in the correct places and provides an auto-fix to clean them up. --- Discussed at [Zulip](https://leanprover.zulipchat.com/#narrow/stream/287929-mathlib4/topic/Whitelist.20for.20Unicode.3F/near/448721083) The current proposal checks each character against a whitelist. There is also the question of what the whitelist should contain. A reasonable whitelist might be "all unicode currently in Mathlib" ∪ [Wikipedia/Mathematical_operators_and_symbols_in_Unicode](https://en.wikipedia.org/wiki/Mathematical_operators_and_symbols_in_Unicode) ∪ [EdAyers/mathlib3/docs/unicode.md](https://github.com/EdAyers/mathlib/blob/fb5c2ffe917049959597b0a93b872e91f4004922/docs/unicode.md). Currently implemented is a subset of this list closer to what's currently present in mathlib. - [x] depends on: #17068 - [x] depends on: #17116 - [x] depends on: #17129 (part 1 of this PR) - ~depends on #34719 (part 1 of this PR)~ - ~depends on: #17131 (part 2 of this PR)~ (obsolete) - [x] depends on: #34022 (part 2 of this PR) - Future note: @adomasbaliuka says: "we might add something to the Mathlib 4 docs about this as well?" [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict t-linter 462/15 Mathlib/GroupTheory/GroupExtension/Defs.lean,Mathlib/Tactic/Linter/TextBased.lean,Mathlib/Tactic/Linter/UnicodeLinter.lean,Mathlib/Tactic/Widget/Calc.lean,Mathlib/Tactic/Widget/CongrM.lean,Mathlib/Tactic/Widget/Conv.lean,Mathlib/Tactic/Widget/GCongr.lean,Mathlib/Topology/ContinuousFunction/Weierstrass.lean,test/LintStyle.lean 9 51 ['adomasbaliuka', 'eric-wieser', 'github-actions', 'grunweg', 'joneugster', 'mathlib-dependent-issues'] joneugster
assignee:joneugster
28-46085
1 month ago
537-68993
537 days ago
1-19055
1 day
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
28-25690
1 month ago
unknown
0-0
0 seconds
35448 mathlib-splicebot
author:mathlib-splicebot
 chore(Mathlib/Tactic/Linter/GlobalSyntax.lean): automated extraction This PR was automatically created from a review comment on PR #34019. t-linter new-contributor 138/0 Mathlib/Tactic/Linter/GlobalSyntax.lean 1 2 ['github-actions'] nobody
27-49742
27 days ago
27-49410
27 days ago
0-403
6 minutes
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
27-23826
27 days ago
118-75995
118 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
27-23823
27 days ago
61-58794
61 days ago
0-546
9 minutes
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 awaiting-author merge-conflict 200/58 Counterexamples/Phillips.lean,Mathlib.lean,Mathlib/SetTheory/Cardinal/ContinuumHypothesis.lean 3 21 ['b-mehta', 'eric-wieser', 'github-actions', 'grunweg', 'mathlib-merge-conflicts', 'plp127', 'vihdzp'] nobody
27-149
27 days ago
59-4145
59 days ago
0-76
1 minute
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
23-5175
23 days ago
669-75454
669 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
18-74537
18 days ago
364-52476
364 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
18-74521
18 days ago
315-56415
315 days ago
39-61332
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
18-8150
18 days ago
282-37449
282 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
17-58848
17 days ago
306-41320
306 days ago
17-16443
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
14-44217
14 days 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
14-42622
14 days ago
231-23888
231 days ago
146-23496
146 days
36072 erdOne
author:erdOne
 feat(AlgebraicGeometry): essential smallness of affine schemes locally of finite type over a base Co-authored-by: Joël Riou --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) delegated 151/2 Mathlib.lean,Mathlib/Algebra/Category/CommAlgCat/FiniteType.lean,Mathlib/Algebra/Category/Ring/Small.lean,Mathlib/AlgebraicGeometry/Morphisms/FiniteType.lean,Mathlib/CategoryTheory/MorphismProperty/Comma.lean,Mathlib/CategoryTheory/ObjectProperty/Small.lean 6 6 ['github-actions', 'joelriou', 'mathlib-bors', 'riccardobrasca'] nobody
11-51847
11 days ago
13-44060
13 days ago
13-45348
13 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
11-22132
11 days ago
24-49309
24 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 15/1 Mathlib/Data/Fintype/Option.lean 1 3 ['github-actions', 'joneugster'] joneugster
assignee:joneugster
10-75045
10 days ago
45-55388
45 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
10-64589
10 days ago
850-41963
850 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
10-64561
10 days ago
490-55667
490 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
10-64538
10 days ago
603-30562
603 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
10-64519
10 days ago
585-42689
585 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
10-64507
10 days ago
270-64246
270 days ago
91-69159
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
10-64490
10 days ago
482-18725
482 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
10-45548
10 days ago
unknown
0-0
0 seconds
32305 faenuccio
author:faenuccio
 feat: define Sobolev Spaces Nothing to see yet. --- - [ ] depends on: #32250 - [ ] depends on: #31809 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict WIP t-analysis large-import blocked-by-other-PR 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 7 ['ADedecker', 'github-actions', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
10-30365
10 days ago
105-61769
105 days ago
0-2
2 seconds
23835 chrisflav
author:chrisflav
 feat(Topology): cardinality of connected components is bounded by cardinality of fiber We show that if `f : X → Y` is an open and closed map to `Y` and `Y` is connected, the number of connected components of `X` is bounded by the cardinality of the fiber of any point. In particular, if `Y` has finitely many connected components and `f` finite fibers, also `X` as finitely many connected components. From Pi1. --- - [x] depends on: #23849 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-topology 276/1 Mathlib.lean,Mathlib/Data/Fintype/Pi.lean,Mathlib/Data/Set/Lattice.lean,Mathlib/Topology/Clopen.lean,Mathlib/Topology/Connected/CardComponents.lean,Mathlib/Topology/Connected/Clopen.lean 6 11 ['chrisflav', 'erdOne', 'github-actions', 'leanprover-community-bot-assistant', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] grunweg
assignee:grunweg
7-41912
7 days ago
145-53901
145 days ago
66-69993
66 days
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 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
7-18795
7 days ago
367-54146
367 days ago
15-14325
15 days
35533 mariainesdff
author:mariainesdff
 feat(RingTheory/DedekindDomain/Ideal/Lemmas): add nontrivial_heightOneSpectrum Co-authored by: @xgenereux. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-ring-theory 12/0 Mathlib/RingTheory/DedekindDomain/Ideal/Lemmas.lean 1 4 ['erdOne', 'github-actions', 'mariainesdff', 'tb65536'] mattrobball
assignee:mattrobball
7-18790
7 days ago
12-76376
12 days ago
19-17076
19 days
35804 mariainesdff
author:mariainesdff
 feat(RingTheory/DividedPowerAlgebra/Init): add universal divided power algebra We define the universal divided power algebra of an `R`-module `M`. Co-authored by @AntoineChambert-Loir --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-ring-theory 284/0 Mathlib.lean,Mathlib/RingTheory/DividedPowerAlgebra/Init.lean 2 1 ['github-actions'] mattrobball
assignee:mattrobball
6-66871
6 days ago
6-66941
6 days ago
18-57481
18 days
36434 mariainesdff
author:mariainesdff
 feat(RingTheory.DividedPowerAlgebra.Init.lean): add weak universal property and functoriality Co-authored by @AntoineChambert-Loir. --- - [ ] depends on: #35804 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-ring-theory blocked-by-other-PR 491/0 Mathlib.lean,Mathlib/RingTheory/DividedPowerAlgebra/Init.lean 2 3 ['github-actions', 'mathlib-dependent-issues'] nobody
6-53716
6 days ago
6-55595
6 days ago
6-55558
6 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 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 1 ['github-actions'] nobody
5-82881
5 days ago
24-29628
24 days ago
0-114
1 minute
36497 eric-wieser
author:eric-wieser
 feat: add missing rfl lemmas for WriterT.run The `FreeM` example in CSLib that demonstrates an alternate construction of `WriterT` suffers from this API being absent, and results to agressively unfolding everything. This also adds some missing `.run`s to fix defeq abuse. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-data 68/16 Mathlib/Control/Monad/Writer.lean 1 1 ['github-actions'] nobody
5-28754
5 days ago
5-28823
5 days ago
5-28875
5 days
36505 eric-wieser
author:eric-wieser
 fix: use `MonadExceptOf` instead of `MonadExcept` for `ContT` and `WriterT` This matches how `ReaderT` and `StateT` do this in core. Also adds some missing `rfl` lemmas, and fixes a stray `id` that should be `Id`. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-data 25/4 Mathlib/Control/Monad/Cont.lean,Mathlib/Control/Monad/Writer.lean 2 1 ['github-actions'] nobody
5-20271
5 days ago
5-22748
5 days ago
5-22703
5 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
5-5022
5 days ago
581-51861
581 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
4-74315
4 days ago
784-45803
784 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
4-74282
4 days ago
768-57723
768 days ago
0-1135
18 minutes
36578 kim-em
author:kim-em
 experiment: `rm_set_option.py` after greedily deploying #36420's `inferInstanceAs%` 822 `set_option.backward`s removed. merge-conflict 462/1180 Archive/Imo/Imo1959Q2.lean,Archive/Imo/Imo1963Q5.lean,Archive/Imo/Imo1982Q3.lean,Archive/Imo/Imo2006Q3.lean,Archive/Wiedijk100Theorems/BuffonsNeedle.lean,Archive/Wiedijk100Theorems/HeronsFormula.lean,Archive/Wiedijk100Theorems/SolutionOfCubicQuartic.lean,Counterexamples/HeawoodUnitDistance.lean,Counterexamples/HomogeneousPrimeNotPrime.lean,Mathlib/Algebra/Algebra/Subalgebra/Basic.lean,Mathlib/Algebra/Algebra/Subalgebra/Lattice.lean,Mathlib/Algebra/Algebra/ZMod.lean,Mathlib/Algebra/Category/AlgCat/Symmetric.lean,Mathlib/Algebra/Category/FGModuleCat/EssentiallySmall.lean,Mathlib/Algebra/Category/Grp/FiniteGrp.lean,Mathlib/Algebra/Category/HopfAlgCat/Monoidal.lean,Mathlib/Algebra/Category/ModuleCat/ExteriorPower.lean,Mathlib/Algebra/Category/ModuleCat/Limits.lean,Mathlib/Algebra/Category/ModuleCat/Localization.lean,Mathlib/Algebra/Category/ModuleCat/Monoidal/Basic.lean,Mathlib/Algebra/Category/Ring/LinearAlgebra.lean,Mathlib/Algebra/Colimit/Module.lean,Mathlib/Algebra/DirectSum/Basic.lean,Mathlib/Algebra/Field/Equiv.lean,Mathlib/Algebra/Field/Subfield/Basic.lean,Mathlib/Algebra/Group/Subgroup/Actions.lean,Mathlib/Algebra/Group/Submonoid/Saturation.lean,Mathlib/Algebra/Homology/DerivedCategory/ExactFunctor.lean,Mathlib/Algebra/Homology/Functor.lean,Mathlib/Algebra/Homology/HomotopyCategory/HomComplexCohomology.lean,Mathlib/Algebra/Lie/Derivation/Basic.lean,Mathlib/Algebra/Lie/Free.lean,Mathlib/Algebra/Lie/NonUnitalNonAssocAlgebra.lean,Mathlib/Algebra/Module/CharacterModule.lean,Mathlib/Algebra/Module/Congruence/Defs.lean,Mathlib/Algebra/Module/LinearMap/Defs.lean,Mathlib/Algebra/Module/LocalizedModule/Basic.lean,Mathlib/Algebra/Module/PUnit.lean,Mathlib/Algebra/MvPolynomial/Nilpotent.lean,Mathlib/Algebra/Order/Floor/Ring.lean,Mathlib/Algebra/Order/Floor/Semifield.lean,Mathlib/Algebra/Order/Group/Unbundled/Abs.lean,Mathlib/Algebra/Order/Ring/StandardPart.lean,Mathlib/Algebra/Polynomial/Module/Basic.lean,Mathlib/Algebra/Quandle.lean,Mathlib/Algebra/Quaternion.lean,Mathlib/Algebra/Ring/Action/Subobjects.lean,Mathlib/Algebra/Ring/Prod.lean,Mathlib/Algebra/Ring/Subring/Basic.lean,Mathlib/Algebra/Star/NonUnitalSubalgebra.lean,Mathlib/Algebra/Star/Prod.lean,Mathlib/Algebra/Star/StarAlgHom.lean,Mathlib/Algebra/Star/Unitary.lean,Mathlib/AlgebraicGeometry/AffineScheme.lean,Mathlib/AlgebraicGeometry/Artinian.lean,Mathlib/AlgebraicGeometry/FunctionField.lean,Mathlib/AlgebraicGeometry/Geometrically/Basic.lean,Mathlib/AlgebraicGeometry/IdealSheaf/Basic.lean,Mathlib/AlgebraicGeometry/Limits.lean,Mathlib/AlgebraicGeometry/LimitsOver.lean,Mathlib/AlgebraicGeometry/Modules/Sheaf.lean,Mathlib/AlgebraicGeometry/Modules/Tilde.lean,Mathlib/AlgebraicGeometry/Morphisms/ClosedImmersion.lean,Mathlib/AlgebraicGeometry/Morphisms/Finite.lean,Mathlib/AlgebraicGeometry/Morphisms/SchemeTheoreticallyDominant.lean,Mathlib/AlgebraicGeometry/Morphisms/UniversallyOpen.lean,Mathlib/AlgebraicGeometry/Normalization.lean,Mathlib/AlgebraicGeometry/ResidueField.lean,Mathlib/AlgebraicGeometry/StructureSheaf.lean,Mathlib/AlgebraicTopology/FundamentalGroupoid/Basic.lean,Mathlib/AlgebraicTopology/FundamentalGroupoid/FundamentalGroup.lean,Mathlib/AlgebraicTopology/SimplexCategory/Basic.lean,Mathlib/AlgebraicTopology/SimplicialCategory/SimplicialObject.lean,Mathlib/AlgebraicTopology/SimplicialNerve.lean,Mathlib/AlgebraicTopology/SimplicialSet/HoFunctorMonoidal.lean,Mathlib/AlgebraicTopology/SimplicialSet/HomotopyCat.lean,Mathlib/AlgebraicTopology/SimplicialSet/Monoidal.lean,Mathlib/AlgebraicTopology/TopologicalSimplex.lean,Mathlib/Analysis/Asymptotics/ExpGrowth.lean,Mathlib/Analysis/Asymptotics/LinearGrowth.lean,Mathlib/Analysis/CStarAlgebra/ContinuousFunctionalCalculus/Continuity.lean,Mathlib/Analysis/CStarAlgebra/ContinuousFunctionalCalculus/Integral.lean,Mathlib/Analysis/CStarAlgebra/ContinuousFunctionalCalculus/Order.lean,Mathlib/Analysis/CStarAlgebra/ContinuousFunctionalCalculus/Range.lean,Mathlib/Analysis/CStarAlgebra/ContinuousMap.lean,Mathlib/Analysis/CStarAlgebra/GelfandDuality.lean,Mathlib/Analysis/CStarAlgebra/GelfandNaimarkSegal.lean,Mathlib/Analysis/Calculus/FDeriv/Symmetric.lean,Mathlib/Analysis/Calculus/LogDeriv.lean,Mathlib/Analysis/Calculus/MeanValue.lean,Mathlib/Analysis/Calculus/SmoothSeries.lean,Mathlib/Analysis/Calculus/UniformLimitsDeriv.lean,Mathlib/Analysis/Complex/BorelCaratheodory.lean,Mathlib/Analysis/Complex/Exponential.lean,Mathlib/Analysis/Complex/Harmonic/Analytic.lean,Mathlib/Analysis/Complex/Harmonic/Liouville.lean,Mathlib/Analysis/Complex/Harmonic/MeanValue.lean,Mathlib/Analysis/Complex/Polynomial/Basic.lean,Mathlib/Analysis/Complex/UpperHalfPlane/Measure.lean,Mathlib/Analysis/Complex/UpperHalfPlane/Metric.lean 430 1 ['github-actions'] nobody
4-11814
4 days ago
4-11927
4 days ago
0-48
48 seconds
36515 kim-em
author:kim-em
 experiment: how many `inferInstanceAs` can be replaced with `inferInstanceAs%` (#36420 version) This is a data-gathering follow-up to @JovanGerb's #36420 (second implementation of the `inferInstanceAs%` term elaborator). We replace every `inferInstanceAs` with `inferInstanceAs%` where this does not cause an error. There is no implicit claim that these changes are a good idea. It lets us do three things: * every remaining `inferInstanceAs` will cause an error with `inferInstanceAs%`, and @JovanGerb (or me, or anyone!) mightly usefully investigate these! * I will run `!radar` below to get timing data * I will run `scripts/rm_set_option.py` to see what impact this has on `set_option backward.isDefeqEq.respectTransparency`. WIP merge-conflict 462/358 Counterexamples/HomogeneousPrimeNotPrime.lean,Mathlib/Algebra/Algebra/Subalgebra/Basic.lean,Mathlib/Algebra/Algebra/Subalgebra/Lattice.lean,Mathlib/Algebra/Algebra/ZMod.lean,Mathlib/Algebra/Category/FGModuleCat/EssentiallySmall.lean,Mathlib/Algebra/Category/Grp/FiniteGrp.lean,Mathlib/Algebra/Category/ModuleCat/ExteriorPower.lean,Mathlib/Algebra/Category/ModuleCat/Localization.lean,Mathlib/Algebra/Colimit/Module.lean,Mathlib/Algebra/DirectSum/Basic.lean,Mathlib/Algebra/Field/Subfield/Basic.lean,Mathlib/Algebra/Group/Subgroup/Actions.lean,Mathlib/Algebra/Group/Submonoid/Saturation.lean,Mathlib/Algebra/Homology/DerivedCategory/ExactFunctor.lean,Mathlib/Algebra/Homology/HomotopyCategory/HomComplexCohomology.lean,Mathlib/Algebra/Module/CharacterModule.lean,Mathlib/Algebra/Module/Congruence/Defs.lean,Mathlib/Algebra/Module/LinearMap/Defs.lean,Mathlib/Algebra/Module/LocalizedModule/Basic.lean,Mathlib/Algebra/Module/PUnit.lean,Mathlib/Algebra/Order/Ring/StandardPart.lean,Mathlib/Algebra/Polynomial/Module/Basic.lean,Mathlib/Algebra/Quaternion.lean,Mathlib/Algebra/Ring/Action/Subobjects.lean,Mathlib/Algebra/Ring/Prod.lean,Mathlib/Algebra/Ring/Subring/Basic.lean,Mathlib/Algebra/Star/Prod.lean,Mathlib/Algebra/Star/StarAlgHom.lean,Mathlib/Algebra/Star/Unitary.lean,Mathlib/AlgebraicGeometry/AffineScheme.lean,Mathlib/AlgebraicGeometry/IdealSheaf/Basic.lean,Mathlib/AlgebraicGeometry/Modules/Sheaf.lean,Mathlib/AlgebraicGeometry/Modules/Tilde.lean,Mathlib/AlgebraicGeometry/ResidueField.lean,Mathlib/AlgebraicGeometry/StructureSheaf.lean,Mathlib/AlgebraicTopology/FundamentalGroupoid/FundamentalGroup.lean,Mathlib/AlgebraicTopology/SimplexCategory/Basic.lean,Mathlib/AlgebraicTopology/SimplicialCategory/SimplicialObject.lean,Mathlib/AlgebraicTopology/SimplicialNerve.lean,Mathlib/AlgebraicTopology/SimplicialSet/HoFunctorMonoidal.lean,Mathlib/AlgebraicTopology/SimplicialSet/HomotopyCat.lean,Mathlib/AlgebraicTopology/SimplicialSet/Monoidal.lean,Mathlib/AlgebraicTopology/TopologicalSimplex.lean,Mathlib/Analysis/Normed/Field/Basic.lean,Mathlib/CategoryTheory/Action/Monoidal.lean,Mathlib/CategoryTheory/Monoidal/Cartesian/GrpLimits.lean,Mathlib/CategoryTheory/Monoidal/CommGrp_.lean,Mathlib/CategoryTheory/Monoidal/Grp_.lean,Mathlib/CategoryTheory/Preadditive/Basic.lean,Mathlib/CategoryTheory/Shift/CommShiftTwo.lean,Mathlib/CategoryTheory/Shift/Opposite.lean,Mathlib/CategoryTheory/Sites/Monoidal.lean,Mathlib/CategoryTheory/Triangulated/Opposite/Functor.lean,Mathlib/CategoryTheory/Triangulated/Opposite/OpOp.lean,Mathlib/Combinatorics/SimpleGraph/Circulant.lean,Mathlib/Computability/Encoding.lean,Mathlib/Computability/TuringMachine/Computable.lean,Mathlib/Data/DFinsupp/Module.lean,Mathlib/Data/ENat/Basic.lean,Mathlib/Data/ENat/Lattice.lean,Mathlib/Data/EReal/Basic.lean,Mathlib/Data/EReal/Inv.lean,Mathlib/Data/Matrix/Basic.lean,Mathlib/FieldTheory/Finite/Polynomial.lean,Mathlib/FieldTheory/IntermediateField/Adjoin/Defs.lean,Mathlib/FieldTheory/IntermediateField/Basic.lean,Mathlib/GroupTheory/GroupAction/Defs.lean,Mathlib/GroupTheory/GroupAction/OfQuotient.lean,Mathlib/GroupTheory/SchurZassenhaus.lean,Mathlib/GroupTheory/Submonoid/Inverses.lean,Mathlib/GroupTheory/Torsion.lean,Mathlib/LinearAlgebra/SymmetricAlgebra/Basic.lean,Mathlib/NumberTheory/ArithmeticFunction/Defs.lean,Mathlib/NumberTheory/NumberField/Basic.lean,Mathlib/NumberTheory/Padics/WithVal.lean,Mathlib/NumberTheory/Pell.lean,Mathlib/RingTheory/Congruence/Basic.lean,Mathlib/RingTheory/Congruence/Defs.lean,Mathlib/RingTheory/Etale/Kaehler.lean,Mathlib/RingTheory/Extension/Basic.lean,Mathlib/RingTheory/FreeCommRing.lean,Mathlib/RingTheory/HahnSeries/Multiplication.lean,Mathlib/RingTheory/HopfAlgebra/MonoidAlgebra.lean,Mathlib/RingTheory/Invariant/Basic.lean,Mathlib/RingTheory/IsTensorProduct.lean,Mathlib/RingTheory/MvPowerSeries/Basic.lean,Mathlib/RingTheory/MvPowerSeries/Inverse.lean,Mathlib/RingTheory/NormalClosure.lean,Mathlib/RingTheory/OreLocalization/Basic.lean,Mathlib/RingTheory/OreLocalization/Ring.lean,Mathlib/RingTheory/PiTensorProduct.lean,Mathlib/RingTheory/Smooth/Kaehler.lean,Mathlib/RingTheory/Unramified/LocalRing.lean,Mathlib/RingTheory/Valuation/Archimedean.lean,Mathlib/RingTheory/Valuation/Basic.lean,Mathlib/RingTheory/Valuation/Extension.lean,Mathlib/RingTheory/Valuation/ValuationSubring.lean,Mathlib/SetTheory/Ordinal/Basic.lean,Mathlib/Tactic/FastInstance.lean,Mathlib/Topology/Algebra/Group/GroupTopology.lean 111 5 ['github-actions', 'kim-em', 'leanprover-radar', 'mathlib-merge-conflicts'] nobody
3-82856
3 days ago
4-85892
4 days ago
0-468
7 minutes
36573 kim-em
author:kim-em
 experiment: `rm_set_option.py` after greedily deploying #35950's `inferInstanceAs%` Removes 769 `set_option backward`s. large-import merge-conflict 994/1295 Archive/Imo/Imo1959Q2.lean,Archive/Imo/Imo1963Q5.lean,Archive/Imo/Imo1982Q3.lean,Archive/Imo/Imo2006Q3.lean,Archive/Wiedijk100Theorems/BuffonsNeedle.lean,Archive/Wiedijk100Theorems/HeronsFormula.lean,Archive/Wiedijk100Theorems/SolutionOfCubicQuartic.lean,Counterexamples/HeawoodUnitDistance.lean,Counterexamples/HomogeneousPrimeNotPrime.lean,Mathlib.lean,Mathlib/Algebra/Algebra/Subalgebra/Basic.lean,Mathlib/Algebra/Algebra/Subalgebra/Lattice.lean,Mathlib/Algebra/Algebra/ZMod.lean,Mathlib/Algebra/Category/AlgCat/Symmetric.lean,Mathlib/Algebra/Category/FGModuleCat/EssentiallySmall.lean,Mathlib/Algebra/Category/Grp/LeftExactFunctor.lean,Mathlib/Algebra/Category/HopfAlgCat/Monoidal.lean,Mathlib/Algebra/Category/ModuleCat/ChangeOfRings.lean,Mathlib/Algebra/Category/ModuleCat/ExteriorPower.lean,Mathlib/Algebra/Category/ModuleCat/Limits.lean,Mathlib/Algebra/Category/ModuleCat/Localization.lean,Mathlib/Algebra/Category/ModuleCat/Monoidal/Basic.lean,Mathlib/Algebra/Category/ModuleCat/Presheaf.lean,Mathlib/Algebra/Category/ModuleCat/Presheaf/ChangeOfRings.lean,Mathlib/Algebra/Category/ModuleCat/Presheaf/EpiMono.lean,Mathlib/Algebra/Category/ModuleCat/Presheaf/Monoidal.lean,Mathlib/Algebra/Category/ModuleCat/Presheaf/Sheafification.lean,Mathlib/Algebra/Category/Ring/Epi.lean,Mathlib/Algebra/Category/Ring/LinearAlgebra.lean,Mathlib/Algebra/Colimit/Module.lean,Mathlib/Algebra/Field/Equiv.lean,Mathlib/Algebra/Field/Subfield/Basic.lean,Mathlib/Algebra/Homology/BifunctorAssociator.lean,Mathlib/Algebra/Homology/CochainComplexPlus.lean,Mathlib/Algebra/Homology/DerivedCategory/Basic.lean,Mathlib/Algebra/Homology/DerivedCategory/ExactFunctor.lean,Mathlib/Algebra/Homology/DerivedCategory/Linear.lean,Mathlib/Algebra/Homology/Embedding/CochainComplex.lean,Mathlib/Algebra/Homology/Embedding/TruncLE.lean,Mathlib/Algebra/Homology/Embedding/TruncLEHomology.lean,Mathlib/Algebra/Homology/Functor.lean,Mathlib/Algebra/Homology/HomotopyCategory/HomComplexCohomology.lean,Mathlib/Algebra/Homology/HomotopyCategory/SingleFunctors.lean,Mathlib/Algebra/Homology/Monoidal.lean,Mathlib/Algebra/Lie/Abelian.lean,Mathlib/Algebra/Lie/Derivation/Basic.lean,Mathlib/Algebra/Lie/Free.lean,Mathlib/Algebra/Lie/LieTheorem.lean,Mathlib/Algebra/Lie/NonUnitalNonAssocAlgebra.lean,Mathlib/Algebra/Lie/Quotient.lean,Mathlib/Algebra/Module/CharacterModule.lean,Mathlib/Algebra/Module/LocalizedModule/Basic.lean,Mathlib/Algebra/Module/LocalizedModule/Submodule.lean,Mathlib/Algebra/Module/Presentation/Finite.lean,Mathlib/Algebra/MvPolynomial/Basic.lean,Mathlib/Algebra/MvPolynomial/Nilpotent.lean,Mathlib/Algebra/Order/Floor/Ring.lean,Mathlib/Algebra/Order/Floor/Semifield.lean,Mathlib/Algebra/Order/Group/Unbundled/Abs.lean,Mathlib/Algebra/Order/Ring/StandardPart.lean,Mathlib/Algebra/Polynomial/Module/AEval.lean,Mathlib/Algebra/Polynomial/Module/Basic.lean,Mathlib/Algebra/Quandle.lean,Mathlib/Algebra/Quaternion.lean,Mathlib/Algebra/Ring/Subring/Basic.lean,Mathlib/Algebra/Star/NonUnitalSubalgebra.lean,Mathlib/Algebra/Star/StarAlgHom.lean,Mathlib/Algebra/Star/Unitary.lean,Mathlib/AlgebraicGeometry/AffineScheme.lean,Mathlib/AlgebraicGeometry/AffineSpace.lean,Mathlib/AlgebraicGeometry/AffineTransitionLimit.lean,Mathlib/AlgebraicGeometry/Artinian.lean,Mathlib/AlgebraicGeometry/FunctionField.lean,Mathlib/AlgebraicGeometry/Geometrically/Basic.lean,Mathlib/AlgebraicGeometry/Gluing.lean,Mathlib/AlgebraicGeometry/Group/Abelian.lean,Mathlib/AlgebraicGeometry/IdealSheaf/Basic.lean,Mathlib/AlgebraicGeometry/IdealSheaf/IrreducibleComponent.lean,Mathlib/AlgebraicGeometry/Limits.lean,Mathlib/AlgebraicGeometry/LimitsOver.lean,Mathlib/AlgebraicGeometry/Modules/Sheaf.lean,Mathlib/AlgebraicGeometry/Modules/Tilde.lean,Mathlib/AlgebraicGeometry/Morphisms/Basic.lean,Mathlib/AlgebraicGeometry/Morphisms/ClosedImmersion.lean,Mathlib/AlgebraicGeometry/Morphisms/Finite.lean,Mathlib/AlgebraicGeometry/Morphisms/FinitePresentation.lean,Mathlib/AlgebraicGeometry/Morphisms/FiniteType.lean,Mathlib/AlgebraicGeometry/Morphisms/Flat.lean,Mathlib/AlgebraicGeometry/Morphisms/FormallyUnramified.lean,Mathlib/AlgebraicGeometry/Morphisms/Immersion.lean,Mathlib/AlgebraicGeometry/Morphisms/Integral.lean,Mathlib/AlgebraicGeometry/Morphisms/IsIso.lean,Mathlib/AlgebraicGeometry/Morphisms/OpenImmersion.lean,Mathlib/AlgebraicGeometry/Morphisms/Proper.lean,Mathlib/AlgebraicGeometry/Morphisms/QuasiFinite.lean,Mathlib/AlgebraicGeometry/Morphisms/RingHomProperties.lean,Mathlib/AlgebraicGeometry/Morphisms/SchemeTheoreticallyDominant.lean,Mathlib/AlgebraicGeometry/Morphisms/Separated.lean,Mathlib/AlgebraicGeometry/Morphisms/UniversallyOpen.lean,Mathlib/AlgebraicGeometry/Noetherian.lean 523 3 ['github-actions', 'mathlib-merge-conflicts'] nobody
3-56266
3 days ago
4-17872
4 days ago
0-169
2 minutes
35535 mariainesdff
author:mariainesdff
 feat(RingTheory/ClassGroup): prove mulEquiv We prove that isomorphic rings have isomorphic class groups. Co-authored by: @xgenereux. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-ring-theory 233/9 Mathlib/Algebra/Ring/CompTypeclasses.lean,Mathlib/RingTheory/ClassGroup.lean,Mathlib/RingTheory/FractionalIdeal/Operations.lean,Mathlib/RingTheory/IntegralClosure/IsIntegral/Basic.lean,Mathlib/RingTheory/LocalProperties/Basic.lean,Mathlib/RingTheory/Localization/FractionRing.lean 6 29 ['erdOne', 'eric-wieser', 'github-actions', 'mariainesdff', 'mathlib-merge-conflicts', 'tb65536'] mattrobball
assignee:mattrobball
3-18778
3 days ago
10-54518
10 days ago
18-12568
18 days
36441 mariainesdff
author:mariainesdff
 feat(Data/Finsupp/Indicator): add lemmas Co-authored by : @AntoineChambert-Loir --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-data 22/1 Mathlib/Data/Finsupp/Indicator.lean 1 1 ['github-actions'] joneugster
assignee:joneugster
3-18754
3 days ago
6-54970
6 days ago
6-54925
6 days
36471 eric-wieser
author:eric-wieser
 feat: more API for Function.IsPartialInv This also renames some lemmas to enable dot notation. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-logic maintainer-merge 33/22 Mathlib/Data/Set/Finite/Basic.lean,Mathlib/Logic/Encodable/Basic.lean,Mathlib/Logic/Function/Basic.lean 3 13 ['Komyyy', 'eric-wieser', 'github-actions'] nobody
2-73520
2 days ago
4-18720
4 days ago
5-23045
5 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
2-49301
2 days ago
581-78675
581 days ago
0-1791
29 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
2-49289
2 days ago
500-69920
500 days ago
29-26213
29 days
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
2-49277
2 days ago
330-80671
330 days ago
56-56728
56 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
2-49265
2 days ago
311-72561
311 days ago
72-3718
72 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
2-49251
2 days ago
293-11954
293 days ago
19-33859
19 days
24373 YaelDillies
author:YaelDillies
 refactor: golf `modularCharacter` ... using the lessons learned from `distribHaarChar`. Unfortunately, the two setups can't quite be unified because we are lacking an additive version of `MulDistribMulAction`. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) awaiting-CI t-measure-probability 77/45 Mathlib/MeasureTheory/Group/MeasurableEquiv.lean,Mathlib/MeasureTheory/Group/Measure.lean,Mathlib/MeasureTheory/Group/ModularCharacter.lean,Mathlib/MeasureTheory/Integral/Bochner/Basic.lean,Mathlib/MeasureTheory/Measure/Haar/Unique.lean 5 5 ['github-actions', 'leanprover-community-bot-assistant', 'mathlib-merge-conflicts', 'mathlib4-merge-conflict-bot'] nobody
1-50924
1 day ago
unknown
0-0
0 seconds
24383 YaelDillies
author:YaelDillies
 feat: distributive Haar characters of `ℝ` and `ℂ` Compute `distribHaarChar` in the case of the actions of `ℝˣ` on `ℝ` and of `ℂˣ` on `ℂ`. The file I'm moving was added two days ago and is not yet used in FLT. From FLT --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) WIP awaiting-CI t-measure-probability file-removed FLT 211/80 Mathlib.lean,Mathlib/Algebra/BigOperators/GroupWithZero/Action.lean,Mathlib/Algebra/Group/Action/BigOperators.lean,Mathlib/MeasureTheory/Measure/Haar/DistribChar/Basic.lean,Mathlib/MeasureTheory/Measure/Haar/DistribChar/Complex.lean,Mathlib/MeasureTheory/Measure/Haar/DistribChar/Real.lean,Mathlib/MeasureTheory/Measure/Lebesgue/Basic.lean,Mathlib/MeasureTheory/Measure/Lebesgue/EqHaar.lean 8 27 ['YaelDillies', 'github-actions', 'kbuzzard', 'leanprover-community-bot-assistant', 'mathlib-merge-conflicts', 'mathlib4-merge-conflict-bot', 'sgouezel'] nobody
1-50813
1 day ago
313-76129
313 days ago
0-12994
3 hours
21342 YaelDillies
author:YaelDillies
 refactor(Normed/Group/Quotient): generalise to non-abelian groups The goal is to apply this to free groups, whose multiplication in either argument is an isometry, but isn't commutative. --- - [x] depends on: #21341 - [ ] depends on: #35037 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-analysis 97/70 Mathlib/Analysis/Normed/Group/Quotient.lean,Mathlib/Analysis/Normed/Group/Uniform.lean,Mathlib/GroupTheory/GroupAction/Quotient.lean,Mathlib/Topology/Algebra/ConstMulAction.lean,Mathlib/Topology/Algebra/Group/Quotient.lean,Mathlib/Topology/Bornology/BoundedOperation.lean 6 12 ['YaelDillies', 'github-actions', 'leanprover-community-bot-assistant', 'mathlib-dependent-issues', 'mathlib-merge-conflicts', 'mathlib4-merge-conflict-bot', 'sgouezel'] sgouezel
assignee:sgouezel
1-50689
1 day ago
19-61495
19 days ago
11-70193
11 days
19475 YaelDillies
author:YaelDillies
 feat: group markings From LeanCamCombi --- - [ ] depends on: #21342 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) WIP t-algebra blocked-by-other-PR
label:t-algebra$
 270/70 Mathlib.lean,Mathlib/Analysis/Normed/Group/Quotient.lean,Mathlib/Analysis/Normed/Group/Uniform.lean,Mathlib/Geometry/Group/Marking.lean,Mathlib/GroupTheory/GroupAction/Quotient.lean,Mathlib/Topology/Algebra/ConstMulAction.lean,Mathlib/Topology/Algebra/Group/Quotient.lean,Mathlib/Topology/Bornology/BoundedOperation.lean 8 16 ['YaelDillies', 'b-mehta', 'github-actions', 'leanprover-community-bot-assistant', 'mathlib-merge-conflicts', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
1-50648
1 day ago
409-51734
409 days ago
22-16818
22 days
36362 bryangingechen
author:bryangingechen
 ci: only generate auto-merge token if the label is present Similar to #35958, we don't need to generate this token if the steps that use it don't need to run. This was causing a build failure for the dependabot PR: #36358 I also cleanup a TODO from #29726. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) CI 12/21 .github/workflows/build_template.yml 1 2 ['github-actions', 'mathlib-merge-conflicts'] joneugster
assignee:joneugster
1-18612
1 day ago
5-83701
5 days ago
8-54544
8 days
36530 kim-em
author:kim-em
 experiment: how many `inferInstanceAs` can be replaced with `inferInstanceAs%` (#35950 version) large-import merge-conflict 480/12 Mathlib.lean,Mathlib/Algebra/Order/Ring/StandardPart.lean,Mathlib/Init.lean,Mathlib/Tactic.lean,Mathlib/Tactic/InferInstanceAsPercent.lean,MathlibTest/InferInstanceAsPercent.lean 6 3 ['github-actions', 'mathlib-merge-conflicts'] nobody
0-77747
21 hours ago
4-63001
4 days ago
0-65
1 minute
36732 kim-em
author:kim-em
 ci: robustly extract PR numbers in emoji merge delegate workflow The previous `awk -F# '{ gsub(/)$/, ""); print $NF}'` pipeline was fragile: for commits without a `(#PR)` suffix it passed the entire commit line (hash + message) to the Python script, which crashed when treating that string as a regex pattern. There should rarely be a commit without a `(#PR)` suffix, as usually commits come via bors, but there's no point leaving this loaded gun lying around. Replace with `grep -oP '(?<=\(#)\d+(?=\))'` which only emits the digit string from commits that contain the exact `(#NUMBER)` pattern, and silently skips any commit without a PR number. 🤖 Prepared with Claude Code CI delegated LLM-generated 1/1 .github/workflows/zulip_emoji_merge_delegate.yaml 1 3 ['bryangingechen', 'github-actions', 'mathlib-bors'] nobody
0-54403
15 hours ago
0-62120
17 hours ago
0-62075
17 hours
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 156/0 Mathlib/Tactic/DefEqAbuse.lean,MathlibTest/DefEqAbuse.lean 2 1 ['github-actions'] nobody
0-54364
15 hours ago
0-85767
23 hours ago
1-2658
1 day
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 414/84 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 3 ['eric-wieser', 'github-actions', 'mathlib-dependent-issues'] nobody
0-54359
15 hours ago
1-11523
1 day ago
0-1003
16 minutes
36582 kim-em
author:kim-em
 feat: run inferInstanceAs% normalization when deriving This PR intercepts `def ... deriving ...` and `deriving instance ... for ...` commands that use the delta deriving handler, and runs the `normalizeInstance` machinery from `inferInstanceAs%` on the synthesized instances. This fixes carrier type leakage at `reducibleAndInstances` transparency for all delta-derived instances across Mathlib. The implementation copies `mkInst` and `processDefDeriving` from `Lean.Elab.Deriving.Basic` (Lean 4.29.0-rc6) and adds the normalization step. This is intentionally a temporary copy: once we settle on the right behavior, it will be upstreamed into Lean 4. - [ ] depends on: #35950 🤖 Prepared with Claude Code large-import blocked-by-other-PR LLM-generated 353/3 Mathlib/Init.lean,Mathlib/Tactic/DerivingInferInstanceAs.lean,Mathlib/Tactic/InferInstanceAsPercent.lean,MathlibTest/DerivingInferInstanceAs.lean 4 2 ['github-actions', 'mathlib-dependent-issues'] nobody
0-54297
15 hours ago
4-7280
4 days ago
0-218
3 minutes
36426 kim-em
author:kim-em
 chore: disable checkType env_linter This PR disables the `checkType` env_linter, which takes ~44% of total linting time to type-check every declaration statement. This is redundant since all declarations are already type-checked when added to the environment, and external kernel checkers (lean4checker, trepplein) verify Mathlib regularly. No one on Zulip recalls ever seeing it fire in practice. 🤖 Prepared with Claude Code LLM-generated 8/0 Mathlib/Init.lean 1 3 ['JovanGerb', 'Vierkantor', 'github-actions'] alexjbest
assignee:alexjbest
0-54285
15 hours ago
7-1767
7 days ago
7-4927
7 days
36423 kim-em
author:kim-em
 perf: decompress already-cached files concurrently with downloads This PR builds on https://github.com/leanprover-community/mathlib4/pull/32987 (pipeline downloads and decompression) and https://github.com/leanprover-community/mathlib4/pull/36367 (fix: decompress already downloaded files). Previously, already-cached `.ltar` files were only decompressed after all downloads completed, in the final `unpackCache` sweep. This PR starts decompressing them concurrently with downloads by spawning `leantar` as a background task before the download phase begins. The two decompression paths operate on disjoint file sets (pre-cached vs newly downloaded), so there is no conflict. In the common case where a user has most files cached but a few hundred to download, this overlaps several seconds of decompression with network I/O. 🤖 Prepared with Claude Code LLM-generated 73/26 Cache/IO.lean,Cache/Requests.lean 2 1 ['github-actions'] urkud
assignee:urkud
0-54281
15 hours ago
7-8652
7 days ago
7-8607
7 days
35950 kim-em
author:kim-em
 feat(Tactic): add inferInstanceAs% to fix type leakage This PR adds `inferInstanceAs%`, a drop-in replacement for `inferInstanceAs` that prevents "type leakage" in synthesized instances. When `inferInstanceAs (SomeClass A)` is used to define `SomeClass B` (where `B` is a non-reducible alias for `A`), the synthesized instance may contain lambda binder domains (and other sub-expressions) referring to `A` or deeper unfoldings instead of `B`. This is invisible at `default` transparency but causes `isDefEq` failures at `reducibleAndInstances` transparency — which is the level used by `grind`'s `checkInst`. `inferInstanceAs%` fixes this by recursively normalizing the constructor tree: it WHNFs to expose the constructor, patches carrier type parameters via `isDefEq` matching against the unfolding chain, recursively processes instance-implicit fields, and replaces lambda binder domains in function fields. As a demonstration, this fixes the `grind` failure in `FiniteResidueField` that was worked around with `#adaptation_note` and a manual proof on `nightly-testing`. 🤖 Prepared with Claude Code t-meta large-import merge-conflict LLM-generated 481/12 Mathlib.lean,Mathlib/Algebra/Order/Ring/StandardPart.lean,Mathlib/Init.lean,Mathlib/Tactic.lean,Mathlib/Tactic/InferInstanceAsPercent.lean,MathlibTest/InferInstanceAsPercent.lean 6 47 ['JovanGerb', 'MichaelStollBayreuth', 'adomani', 'astrainfinita', 'github-actions', 'kim-em', 'leanprover-radar', 'mathlib-bors', 'mathlib-merge-conflicts', 'riccardobrasca'] JovanGerb
assignee:JovanGerb
0-54172
15 hours ago
4-7240
4 days ago
8-50750
8 days
35518 kim-em
author:kim-em
 chore: forbid prime (') in filenames, rename LinearCombination' This PR renames `Mathlib/Tactic/LinearCombination'.lean` to `LinearCombinationPrime.lean` (and the corresponding test file), and adds a lint check to `modulesOSForbidden` to prevent future files with prime/apostrophe characters in their names. The `'` character in filenames causes shell escaping issues in scripts (any `find ... -name '*.lean'` or similar pattern needs careful quoting to handle these files correctly). 🤖 Prepared with Claude Code file-removed t-meta merge-conflict LLM-generated 13/8 Mathlib.lean,Mathlib/Tactic.lean,Mathlib/Tactic/LinearCombinationPrime.lean,Mathlib/Tactic/Linter/TextBased.lean,Mathlib/Tactic/Linter/UnusedTactic.lean,MathlibTest/linear_combination_prime.lean 6 7 ['eric-wieser', 'euprunin', 'github-actions', 'kim-em', 'mathlib-merge-conflicts'] adamtopaz
assignee:adamtopaz
0-54095
15 hours ago
23-75208
23 days ago
23-78349
23 days
35763 kim-em
author:kim-em
 chore(scripts): make rm_set_option cache opt-in via --resume This PR changes `scripts/rm_set_option.py` so the progress cache is only used when explicitly requested via `--resume`, rather than being on by default (with `--no-resume` to disable). The previous default was unsafe: the cache only checks that the target module's own SHA256 is unchanged, so edits to upstream modules between runs would be silently ignored, causing the script to skip modules that should be reprocessed. 🤖 Prepared with Claude Code LLM-generated 4/4 scripts/README.md,scripts/rm_set_option.py 2 1 ['github-actions'] dupuisf
assignee:dupuisf
0-54095
15 hours ago
19-64972
19 days ago
19-64927
19 days
36444 mariainesdff
author:mariainesdff
 feat(Algebra/MvPolynomial/Coeff): add lemmas Co-authored by: @AntoineChambert-Loir. --- - [] depends on: ##36441 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-ring-theory WIP 162/1 Mathlib.lean,Mathlib/Algebra/MvPolynomial/Basic.lean,Mathlib/Algebra/MvPolynomial/Coeff.lean,Mathlib/Data/Finsupp/Indicator.lean,Mathlib/Data/Nat/Choose/Multinomial.lean 5 1 ['github-actions'] nobody
0-51281
14 hours ago
6-51377
6 days ago
0-951
15 minutes
36737 mariainesdff
author:mariainesdff
 chore(Algebra/SkewMonoidAlgebra/Basic): generalize lemmas from Monoid to Mul --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-algebra easy
label:t-algebra$
 16/10 Mathlib/Algebra/SkewMonoidAlgebra/Basic.lean 1 1 ['github-actions'] nobody
0-50314
13 hours ago
0-50403
13 hours ago
0-50358
13 hours
25273 YaelDillies
author:YaelDillies
 refactor: 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: #3667592 - [ ] depends on: #36746 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) WIP t-algebra large-import
label:t-algebra$
 1684/1525 Mathlib/Algebra/FreeAlgebra/Cardinality.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/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/Eval/Coeff.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/LinearAlgebra/Finsupp/VectorSpace.lean,Mathlib/LinearAlgebra/FreeAlgebra.lean,Mathlib/LinearAlgebra/LinearIndependent/Lemmas.lean,Mathlib/LinearAlgebra/Matrix/Charpoly/Univ.lean,Mathlib/NumberTheory/Height/MvPolynomial.lean,Mathlib/RepresentationTheory/Action.lean,Mathlib/RepresentationTheory/Basic.lean,Mathlib/RepresentationTheory/Equiv.lean,Mathlib/RepresentationTheory/Rep.lean,Mathlib/RingTheory/Coalgebra/MonoidAlgebra.lean,Mathlib/RingTheory/Extension/Generators.lean,Mathlib/RingTheory/FinitePresentation.lean,Mathlib/RingTheory/FiniteType.lean,Mathlib/RingTheory/Finiteness/Finsupp.lean,Mathlib/RingTheory/HopfAlgebra/MonoidAlgebra.lean,Mathlib/RingTheory/MvPolynomial/Basic.lean,Mathlib/RingTheory/MvPolynomial/EulerIdentity.lean,Mathlib/RingTheory/MvPolynomial/FreeCommRing.lean,Mathlib/RingTheory/MvPolynomial/Homogeneous.lean,Mathlib/RingTheory/MvPolynomial/IrreducibleQuadratic.lean,Mathlib/RingTheory/MvPolynomial/Symmetric/Defs.lean,Mathlib/RingTheory/MvPolynomial/WeightedHomogeneous.lean,Mathlib/RingTheory/Polynomial/Basic.lean,Mathlib/RingTheory/Polynomial/Opposites.lean,Mathlib/RingTheory/TensorProduct/MonoidAlgebra.lean,Mathlib/RingTheory/TensorProduct/MvPolynomial.lean 69 90 ['JovanGerb', 'YaelDillies', 'alreadydone', 'eric-wieser', 'fpvandoorn', 'github-actions', 'leanprover-community-bot-assistant', 'mathlib-dependent-issues', 'mathlib-merge-conflicts', 'mathlib4-merge-conflict-bot'] nobody
0-36173
10 hours ago
255-69757
255 days ago
36-61320
36 days
36666 mathlib-nolints
author:mathlib-nolints
 chore: remove declarations deprecated between 2021-03-15 and 2025-09-15 I am happy to remove some deprecated declarations for you! Please check if there are any remaining stray comments or other issues before merging. --- [workflow run for this PR](https://github.com/leanprover-community/mathlib4/actions/runs/23103692966) new-contributor merge-conflict 0/1571 Mathlib/Algebra/BigOperators/Group/Finset/Basic.lean,Mathlib/Algebra/Category/CommAlgCat/Basic.lean,Mathlib/Algebra/Field/Basic.lean,Mathlib/Algebra/Group/Action/Faithful.lean,Mathlib/Algebra/Group/End.lean,Mathlib/Algebra/Group/Submonoid/Operations.lean,Mathlib/Algebra/Group/Units/Defs.lean,Mathlib/Algebra/Group/WithOne/Basic.lean,Mathlib/Algebra/GroupWithZero/Range.lean,Mathlib/Algebra/Lie/Subalgebra.lean,Mathlib/Algebra/Lie/Submodule.lean,Mathlib/Algebra/Module/LocalizedModule/Basic.lean,Mathlib/Algebra/Module/Submodule/Lattice.lean,Mathlib/Algebra/Module/Submodule/Range.lean,Mathlib/Algebra/Order/BigOperators/Group/Finset.lean,Mathlib/Algebra/Order/Group/Cone.lean,Mathlib/Algebra/Order/Group/Unbundled/Int.lean,Mathlib/Algebra/Order/Module/PositiveLinearMap.lean,Mathlib/Algebra/Order/Ring/Cone.lean,Mathlib/Algebra/Order/Star/Basic.lean,Mathlib/Algebra/Quaternion.lean,Mathlib/Algebra/Ring/GeomSum.lean,Mathlib/Algebra/Star/StarAlgHom.lean,Mathlib/Algebra/Vertex/HVertexOperator.lean,Mathlib/Algebra/Vertex/VertexOperator.lean,Mathlib/AlgebraicGeometry/ProjectiveSpectrum/Basic.lean,Mathlib/AlgebraicGeometry/Sites/Pretopology.lean,Mathlib/AlgebraicTopology/SimplexCategory/Augmented/Basic.lean,Mathlib/AlgebraicTopology/TopologicalSimplex.lean,Mathlib/Analysis/AbsoluteValue/Equivalence.lean,Mathlib/Analysis/Analytic/CPolynomial.lean,Mathlib/Analysis/Calculus/Implicit.lean,Mathlib/Analysis/Calculus/InverseFunctionTheorem/ApproximatesLinearOn.lean,Mathlib/Analysis/Calculus/InverseFunctionTheorem/ContDiff.lean,Mathlib/Analysis/Calculus/InverseFunctionTheorem/FDeriv.lean,Mathlib/Analysis/InnerProductSpace/Positive.lean,Mathlib/Analysis/Matrix/PosDef.lean,Mathlib/Analysis/Normed/Field/Lemmas.lean,Mathlib/Analysis/Normed/Group/Hom.lean,Mathlib/Analysis/Normed/Module/WeakDual.lean,Mathlib/Analysis/Normed/Operator/Basic.lean,Mathlib/Analysis/Normed/Operator/Mul.lean,Mathlib/Analysis/Quaternion.lean,Mathlib/Analysis/SpecialFunctions/Pow/Asymptotics.lean,Mathlib/CategoryTheory/Action.lean,Mathlib/CategoryTheory/Groupoid/Grpd/Basic.lean,Mathlib/CategoryTheory/Limits/Presheaf.lean,Mathlib/CategoryTheory/Limits/Types/Colimits.lean,Mathlib/CategoryTheory/Localization/Bifunctor.lean,Mathlib/CategoryTheory/Localization/Predicate.lean,Mathlib/CategoryTheory/Localization/Trifunctor.lean,Mathlib/CategoryTheory/Monoidal/Bimon_.lean,Mathlib/CategoryTheory/Monoidal/Cartesian/CommGrp_.lean,Mathlib/CategoryTheory/Monoidal/Cartesian/CommMon_.lean,Mathlib/CategoryTheory/Monoidal/Cartesian/Comon_.lean,Mathlib/CategoryTheory/Monoidal/Cartesian/Grp_.lean,Mathlib/CategoryTheory/Monoidal/Cartesian/Mod_.lean,Mathlib/CategoryTheory/Monoidal/Cartesian/Mon_.lean,Mathlib/CategoryTheory/Monoidal/CommGrp_.lean,Mathlib/CategoryTheory/Monoidal/CommMon_.lean,Mathlib/CategoryTheory/Monoidal/Comon_.lean,Mathlib/CategoryTheory/Monoidal/Grp_.lean,Mathlib/CategoryTheory/Monoidal/Hopf_.lean,Mathlib/CategoryTheory/Monoidal/Mod_.lean,Mathlib/CategoryTheory/Monoidal/Mon_.lean,Mathlib/CategoryTheory/Sites/Coverage.lean,Mathlib/CategoryTheory/Sites/MorphismProperty.lean,Mathlib/CategoryTheory/Sites/SheafOfTypes.lean,Mathlib/CategoryTheory/Sites/Sieves.lean,Mathlib/Combinatorics/Colex.lean,Mathlib/Combinatorics/SimpleGraph/Coloring.lean,Mathlib/Combinatorics/SimpleGraph/Paths.lean,Mathlib/Combinatorics/SimpleGraph/Subgraph.lean,Mathlib/Combinatorics/SimpleGraph/Walks/Operations.lean,Mathlib/Computability/Primrec/Basic.lean,Mathlib/Data/Finset/Filter.lean,Mathlib/Data/Finset/Range.lean,Mathlib/Data/Nat/Init.lean,Mathlib/Data/Nat/PartENat.lean,Mathlib/Data/Rat/Defs.lean,Mathlib/Data/Rat/Floor.lean,Mathlib/Data/Real/Basic.lean,Mathlib/Data/Set/Function.lean,Mathlib/Data/Set/Image.lean,Mathlib/Data/Subtype.lean,Mathlib/Data/ZMod/Basic.lean,Mathlib/Deprecated/Estimator.lean,Mathlib/Deprecated/MLList/BestFirst.lean,Mathlib/Geometry/Manifold/Algebra/LieGroup.lean,Mathlib/Geometry/Manifold/ChartedSpace.lean,Mathlib/Geometry/Manifold/Diffeomorph.lean,Mathlib/Geometry/Manifold/HasGroupoid.lean,Mathlib/Geometry/Manifold/IsManifold/ExtChartAt.lean,Mathlib/Geometry/Manifold/LocalDiffeomorph.lean,Mathlib/Geometry/Manifold/MFDeriv/UniqueDifferential.lean,Mathlib/Geometry/Manifold/VectorBundle/Basic.lean,Mathlib/Geometry/Manifold/VectorBundle/FiberwiseLinear.lean,Mathlib/GroupTheory/Finiteness.lean,Mathlib/GroupTheory/Perm/Basic.lean,Mathlib/GroupTheory/Perm/Cycle/Type.lean 173 4 ['Parcly-Taxel', 'github-actions', 'mathlib-merge-conflicts'] nobody
0-28305
7 hours ago
2-32
1 day ago
0-3227
53 minutes
35756 mariainesdff
author:mariainesdff
 feat(Data/Nat/Choose/Multinomial): add lemmas Co-authored-by: @AntoineChambert-Loir. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-combinatorics t-data maintainer-merge 25/0 Mathlib/Data/Nat/Choose/Multinomial.lean 1 5 ['github-actions', 'joneugster'] joneugster
assignee:joneugster
0-23575
6 hours ago
0-53503
14 hours ago
18-69637
18 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 316/80 Mathlib/Tactic/DefEqAbuse.lean,Mathlib/Tactic/FastInstance.lean,MathlibTest/CheckInstance.lean,MathlibTest/DefEqAbuse.lean 4 14 ['eric-wieser', 'github-actions', 'kim-em'] nobody
0-11514
3 hours ago
0-75529
20 hours ago
1-5363
1 day
36714 kim-em
author:kim-em
 chore: bot instructions clone mathlib to a temp dir This PR updates the copy-pasteable instructions posted by the nightly bots so they no longer require the user to have an existing Mathlib checkout. Instead, they create a fresh clone in a unique temp directory using \`mktemp -d\`. This also avoids potential fragility from running these scripts inside a worktree. Affects two bots: - \`nightly_detect_failure.yml\`: bump PR creation instructions - \`nightly_bump_and_merge.yml\`: failed lean-pr-testing merge instructions 🤖 Prepared with Claude Code CI LLM-generated awaiting-author 9/6 .github/workflows/nightly_bump_and_merge.yml,.github/workflows/nightly_detect_failure.yml 2 2 ['github-actions', 'marcelolynch'] nobody
0-7380
2 hours ago
1-5137
1 day ago
1-5092
1 day

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
35700 inaciovasquez2020
author:inaciovasquez2020
 MeasureTheory: introduce supportDrift for probability measures Minimal mathlib-facing definition of with lemma. Clean-clone reproducibility verified. t-measure-probability new-contributor 119/0 Mathlib/MeasureTheory/SupportDrift.lean,Mathlib/Physics/OperatorAnchor/CoerciveGap.lean,Mathlib/Physics/OperatorAnchor/SpectralGap.lean 3 2 ['github-actions'] nobody
15-40672
15 days ago
15-40374
15 days ago
0-742
12 minutes
35576 Tehlikeli107
author:Tehlikeli107
 ⚡ [performance] Pre-compile regexes in lake-build-wrapper.py - Pre-compile `file_info_re` and `progress_re` in `BuildOutputProcessor.__init__` to avoid repeated compilation overhead. - Replace `re.sub(r'\.', '/', target)` with `target.replace('.', '/')` for better performance when converting module names to file paths. These changes result in a measured ~40% performance improvement in the core processing logic of the wrapper script. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) file-removed awaiting-author CI new-contributor merge-conflict 8/707 scripts/bench/README.md,scripts/bench/build/README.md,scripts/bench/build/fake-root/bin/lean,scripts/bench/build/fake-root/bin/lean.py,scripts/bench/build/lakeprof_report_template.html,scripts/bench/build/lakeprof_report_upload.py,scripts/bench/build/run,scripts/bench/combine.py,scripts/bench/lint/README.md,scripts/bench/lint/run,scripts/bench/measure.py,scripts/bench/open-mathlib/README.md,scripts/bench/open-mathlib/run,scripts/bench/repeatedly.py,scripts/bench/run,scripts/bench/size/README.md,scripts/bench/size/run,scripts/bench/size/run.py,scripts/lake-build-wrapper.py 19 7 ['bryangingechen', 'felixpernegger', 'github-actions', 'grunweg', 'mathlib-merge-conflicts'] nobody
13-74798
13 days ago
24-41071
24 days ago
0-8924
2 hours
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
5-23624
5 days ago
5-23350
5 days ago
0-364
6 minutes
36151 sgouezel
author:sgouezel
 brutal search and replace --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict 1917/1430 Archive/Sensitivity.lean,Archive/Wiedijk100Theorems/Konigsberg.lean,Counterexamples/HeawoodUnitDistance.lean,Counterexamples/HomogeneousPrimeNotPrime.lean,Mathlib.lean,Mathlib/Algebra/Algebra/Subalgebra/Basic.lean,Mathlib/Algebra/Algebra/Subalgebra/Lattice.lean,Mathlib/Algebra/Algebra/ZMod.lean,Mathlib/Algebra/Category/AlgCat/Limits.lean,Mathlib/Algebra/Category/BoolRing.lean,Mathlib/Algebra/Category/CommAlgCat/Basic.lean,Mathlib/Algebra/Category/CommAlgCat/FiniteType.lean,Mathlib/Algebra/Category/CommBialgCat.lean,Mathlib/Algebra/Category/FGModuleCat/Basic.lean,Mathlib/Algebra/Category/FGModuleCat/EssentiallySmall.lean,Mathlib/Algebra/Category/Grp/FiniteGrp.lean,Mathlib/Algebra/Category/Grp/LeftExactFunctor.lean,Mathlib/Algebra/Category/Grp/Limits.lean,Mathlib/Algebra/Category/ModuleCat/ChangeOfRings.lean,Mathlib/Algebra/Category/ModuleCat/ExteriorPower.lean,Mathlib/Algebra/Category/ModuleCat/Limits.lean,Mathlib/Algebra/Category/ModuleCat/Localization.lean,Mathlib/Algebra/Category/ModuleCat/Monoidal/Basic.lean,Mathlib/Algebra/Category/ModuleCat/Presheaf.lean,Mathlib/Algebra/Category/ModuleCat/Presheaf/ChangeOfRings.lean,Mathlib/Algebra/Category/ModuleCat/Presheaf/EpiMono.lean,Mathlib/Algebra/Category/ModuleCat/Presheaf/Monoidal.lean,Mathlib/Algebra/Category/ModuleCat/Presheaf/Sheafification.lean,Mathlib/Algebra/Category/MonCat/Limits.lean,Mathlib/Algebra/Category/Ring/Epi.lean,Mathlib/Algebra/Category/Ring/Limits.lean,Mathlib/Algebra/Colimit/Module.lean,Mathlib/Algebra/DirectSum/Basic.lean,Mathlib/Algebra/DirectSum/Internal.lean,Mathlib/Algebra/EuclideanDomain/Int.lean,Mathlib/Algebra/Field/Subfield/Basic.lean,Mathlib/Algebra/FreeMonoid/Basic.lean,Mathlib/Algebra/GradedMonoid.lean,Mathlib/Algebra/Group/Conj.lean,Mathlib/Algebra/Group/ConjFinite.lean,Mathlib/Algebra/Group/Fin/Basic.lean,Mathlib/Algebra/Group/Subgroup/Actions.lean,Mathlib/Algebra/Group/Submonoid/Membership.lean,Mathlib/Algebra/Homology/BifunctorAssociator.lean,Mathlib/Algebra/Homology/DerivedCategory/Basic.lean,Mathlib/Algebra/Homology/DerivedCategory/ExactFunctor.lean,Mathlib/Algebra/Homology/DerivedCategory/Linear.lean,Mathlib/Algebra/Homology/Embedding/CochainComplex.lean,Mathlib/Algebra/Homology/Embedding/TruncLE.lean,Mathlib/Algebra/Homology/Embedding/TruncLEHomology.lean,Mathlib/Algebra/Homology/HasNoLoop.lean,Mathlib/Algebra/Homology/HomotopyCategory/HomComplexCohomology.lean,Mathlib/Algebra/Homology/HomotopyCategory/SingleFunctors.lean,Mathlib/Algebra/Homology/Monoidal.lean,Mathlib/Algebra/Lie/Abelian.lean,Mathlib/Algebra/Lie/LieTheorem.lean,Mathlib/Algebra/Lie/Quotient.lean,Mathlib/Algebra/Lie/Solvable.lean,Mathlib/Algebra/Lie/Submodule.lean,Mathlib/Algebra/Module/CharacterModule.lean,Mathlib/Algebra/Module/Congruence/Defs.lean,Mathlib/Algebra/Module/LinearMap/Defs.lean,Mathlib/Algebra/Module/LocalizedModule/Basic.lean,Mathlib/Algebra/Module/LocalizedModule/Submodule.lean,Mathlib/Algebra/Module/PUnit.lean,Mathlib/Algebra/Module/Presentation/Finite.lean,Mathlib/Algebra/Module/Torsion/Basic.lean,Mathlib/Algebra/Module/ZLattice/Basic.lean,Mathlib/Algebra/Module/ZLattice/Summable.lean,Mathlib/Algebra/MonoidAlgebra/Defs.lean,Mathlib/Algebra/MvPolynomial/Basic.lean,Mathlib/Algebra/MvPolynomial/Nilpotent.lean,Mathlib/Algebra/Order/Archimedean/Class.lean,Mathlib/Algebra/Order/Group/Synonym.lean,Mathlib/Algebra/Order/GroupWithZero/Canonical.lean,Mathlib/Algebra/Order/Ring/StandardPart.lean,Mathlib/Algebra/Polynomial/Degree/TrailingDegree.lean,Mathlib/Algebra/Polynomial/Module/AEval.lean,Mathlib/Algebra/Polynomial/Module/Basic.lean,Mathlib/Algebra/Quaternion.lean,Mathlib/Algebra/Ring/Action/Subobjects.lean,Mathlib/Algebra/Ring/Defs.lean,Mathlib/Algebra/Ring/Prod.lean,Mathlib/Algebra/Ring/Subring/Basic.lean,Mathlib/Algebra/Ring/Subsemiring/Basic.lean,Mathlib/Algebra/Star/Prod.lean,Mathlib/Algebra/Star/StarAlgHom.lean,Mathlib/Algebra/Star/Unitary.lean,Mathlib/AlgebraicGeometry/AffineScheme.lean,Mathlib/AlgebraicGeometry/AffineSpace.lean,Mathlib/AlgebraicGeometry/AffineTransitionLimit.lean,Mathlib/AlgebraicGeometry/Artinian.lean,Mathlib/AlgebraicGeometry/Cover/Directed.lean,Mathlib/AlgebraicGeometry/Cover/Over.lean,Mathlib/AlgebraicGeometry/Cover/Sigma.lean,Mathlib/AlgebraicGeometry/Gluing.lean,Mathlib/AlgebraicGeometry/Group/Abelian.lean,Mathlib/AlgebraicGeometry/IdealSheaf/Basic.lean,Mathlib/AlgebraicGeometry/IdealSheaf/IrreducibleComponent.lean,Mathlib/AlgebraicGeometry/Limits.lean 570 0 [] nobody
4-65037
4 days ago
11-34407
11 days ago
0-89
1 minute
36578 kim-em
author:kim-em
 experiment: `rm_set_option.py` after greedily deploying #36420's `inferInstanceAs%` 822 `set_option.backward`s removed. merge-conflict 462/1180 Archive/Imo/Imo1959Q2.lean,Archive/Imo/Imo1963Q5.lean,Archive/Imo/Imo1982Q3.lean,Archive/Imo/Imo2006Q3.lean,Archive/Wiedijk100Theorems/BuffonsNeedle.lean,Archive/Wiedijk100Theorems/HeronsFormula.lean,Archive/Wiedijk100Theorems/SolutionOfCubicQuartic.lean,Counterexamples/HeawoodUnitDistance.lean,Counterexamples/HomogeneousPrimeNotPrime.lean,Mathlib/Algebra/Algebra/Subalgebra/Basic.lean,Mathlib/Algebra/Algebra/Subalgebra/Lattice.lean,Mathlib/Algebra/Algebra/ZMod.lean,Mathlib/Algebra/Category/AlgCat/Symmetric.lean,Mathlib/Algebra/Category/FGModuleCat/EssentiallySmall.lean,Mathlib/Algebra/Category/Grp/FiniteGrp.lean,Mathlib/Algebra/Category/HopfAlgCat/Monoidal.lean,Mathlib/Algebra/Category/ModuleCat/ExteriorPower.lean,Mathlib/Algebra/Category/ModuleCat/Limits.lean,Mathlib/Algebra/Category/ModuleCat/Localization.lean,Mathlib/Algebra/Category/ModuleCat/Monoidal/Basic.lean,Mathlib/Algebra/Category/Ring/LinearAlgebra.lean,Mathlib/Algebra/Colimit/Module.lean,Mathlib/Algebra/DirectSum/Basic.lean,Mathlib/Algebra/Field/Equiv.lean,Mathlib/Algebra/Field/Subfield/Basic.lean,Mathlib/Algebra/Group/Subgroup/Actions.lean,Mathlib/Algebra/Group/Submonoid/Saturation.lean,Mathlib/Algebra/Homology/DerivedCategory/ExactFunctor.lean,Mathlib/Algebra/Homology/Functor.lean,Mathlib/Algebra/Homology/HomotopyCategory/HomComplexCohomology.lean,Mathlib/Algebra/Lie/Derivation/Basic.lean,Mathlib/Algebra/Lie/Free.lean,Mathlib/Algebra/Lie/NonUnitalNonAssocAlgebra.lean,Mathlib/Algebra/Module/CharacterModule.lean,Mathlib/Algebra/Module/Congruence/Defs.lean,Mathlib/Algebra/Module/LinearMap/Defs.lean,Mathlib/Algebra/Module/LocalizedModule/Basic.lean,Mathlib/Algebra/Module/PUnit.lean,Mathlib/Algebra/MvPolynomial/Nilpotent.lean,Mathlib/Algebra/Order/Floor/Ring.lean,Mathlib/Algebra/Order/Floor/Semifield.lean,Mathlib/Algebra/Order/Group/Unbundled/Abs.lean,Mathlib/Algebra/Order/Ring/StandardPart.lean,Mathlib/Algebra/Polynomial/Module/Basic.lean,Mathlib/Algebra/Quandle.lean,Mathlib/Algebra/Quaternion.lean,Mathlib/Algebra/Ring/Action/Subobjects.lean,Mathlib/Algebra/Ring/Prod.lean,Mathlib/Algebra/Ring/Subring/Basic.lean,Mathlib/Algebra/Star/NonUnitalSubalgebra.lean,Mathlib/Algebra/Star/Prod.lean,Mathlib/Algebra/Star/StarAlgHom.lean,Mathlib/Algebra/Star/Unitary.lean,Mathlib/AlgebraicGeometry/AffineScheme.lean,Mathlib/AlgebraicGeometry/Artinian.lean,Mathlib/AlgebraicGeometry/FunctionField.lean,Mathlib/AlgebraicGeometry/Geometrically/Basic.lean,Mathlib/AlgebraicGeometry/IdealSheaf/Basic.lean,Mathlib/AlgebraicGeometry/Limits.lean,Mathlib/AlgebraicGeometry/LimitsOver.lean,Mathlib/AlgebraicGeometry/Modules/Sheaf.lean,Mathlib/AlgebraicGeometry/Modules/Tilde.lean,Mathlib/AlgebraicGeometry/Morphisms/ClosedImmersion.lean,Mathlib/AlgebraicGeometry/Morphisms/Finite.lean,Mathlib/AlgebraicGeometry/Morphisms/SchemeTheoreticallyDominant.lean,Mathlib/AlgebraicGeometry/Morphisms/UniversallyOpen.lean,Mathlib/AlgebraicGeometry/Normalization.lean,Mathlib/AlgebraicGeometry/ResidueField.lean,Mathlib/AlgebraicGeometry/StructureSheaf.lean,Mathlib/AlgebraicTopology/FundamentalGroupoid/Basic.lean,Mathlib/AlgebraicTopology/FundamentalGroupoid/FundamentalGroup.lean,Mathlib/AlgebraicTopology/SimplexCategory/Basic.lean,Mathlib/AlgebraicTopology/SimplicialCategory/SimplicialObject.lean,Mathlib/AlgebraicTopology/SimplicialNerve.lean,Mathlib/AlgebraicTopology/SimplicialSet/HoFunctorMonoidal.lean,Mathlib/AlgebraicTopology/SimplicialSet/HomotopyCat.lean,Mathlib/AlgebraicTopology/SimplicialSet/Monoidal.lean,Mathlib/AlgebraicTopology/TopologicalSimplex.lean,Mathlib/Analysis/Asymptotics/ExpGrowth.lean,Mathlib/Analysis/Asymptotics/LinearGrowth.lean,Mathlib/Analysis/CStarAlgebra/ContinuousFunctionalCalculus/Continuity.lean,Mathlib/Analysis/CStarAlgebra/ContinuousFunctionalCalculus/Integral.lean,Mathlib/Analysis/CStarAlgebra/ContinuousFunctionalCalculus/Order.lean,Mathlib/Analysis/CStarAlgebra/ContinuousFunctionalCalculus/Range.lean,Mathlib/Analysis/CStarAlgebra/ContinuousMap.lean,Mathlib/Analysis/CStarAlgebra/GelfandDuality.lean,Mathlib/Analysis/CStarAlgebra/GelfandNaimarkSegal.lean,Mathlib/Analysis/Calculus/FDeriv/Symmetric.lean,Mathlib/Analysis/Calculus/LogDeriv.lean,Mathlib/Analysis/Calculus/MeanValue.lean,Mathlib/Analysis/Calculus/SmoothSeries.lean,Mathlib/Analysis/Calculus/UniformLimitsDeriv.lean,Mathlib/Analysis/Complex/BorelCaratheodory.lean,Mathlib/Analysis/Complex/Exponential.lean,Mathlib/Analysis/Complex/Harmonic/Analytic.lean,Mathlib/Analysis/Complex/Harmonic/Liouville.lean,Mathlib/Analysis/Complex/Harmonic/MeanValue.lean,Mathlib/Analysis/Complex/Polynomial/Basic.lean,Mathlib/Analysis/Complex/UpperHalfPlane/Measure.lean,Mathlib/Analysis/Complex/UpperHalfPlane/Metric.lean 430 1 ['github-actions'] nobody
4-11814
4 days ago
4-11927
4 days ago
0-48
48 seconds
36573 kim-em
author:kim-em
 experiment: `rm_set_option.py` after greedily deploying #35950's `inferInstanceAs%` Removes 769 `set_option backward`s. large-import merge-conflict 994/1295 Archive/Imo/Imo1959Q2.lean,Archive/Imo/Imo1963Q5.lean,Archive/Imo/Imo1982Q3.lean,Archive/Imo/Imo2006Q3.lean,Archive/Wiedijk100Theorems/BuffonsNeedle.lean,Archive/Wiedijk100Theorems/HeronsFormula.lean,Archive/Wiedijk100Theorems/SolutionOfCubicQuartic.lean,Counterexamples/HeawoodUnitDistance.lean,Counterexamples/HomogeneousPrimeNotPrime.lean,Mathlib.lean,Mathlib/Algebra/Algebra/Subalgebra/Basic.lean,Mathlib/Algebra/Algebra/Subalgebra/Lattice.lean,Mathlib/Algebra/Algebra/ZMod.lean,Mathlib/Algebra/Category/AlgCat/Symmetric.lean,Mathlib/Algebra/Category/FGModuleCat/EssentiallySmall.lean,Mathlib/Algebra/Category/Grp/LeftExactFunctor.lean,Mathlib/Algebra/Category/HopfAlgCat/Monoidal.lean,Mathlib/Algebra/Category/ModuleCat/ChangeOfRings.lean,Mathlib/Algebra/Category/ModuleCat/ExteriorPower.lean,Mathlib/Algebra/Category/ModuleCat/Limits.lean,Mathlib/Algebra/Category/ModuleCat/Localization.lean,Mathlib/Algebra/Category/ModuleCat/Monoidal/Basic.lean,Mathlib/Algebra/Category/ModuleCat/Presheaf.lean,Mathlib/Algebra/Category/ModuleCat/Presheaf/ChangeOfRings.lean,Mathlib/Algebra/Category/ModuleCat/Presheaf/EpiMono.lean,Mathlib/Algebra/Category/ModuleCat/Presheaf/Monoidal.lean,Mathlib/Algebra/Category/ModuleCat/Presheaf/Sheafification.lean,Mathlib/Algebra/Category/Ring/Epi.lean,Mathlib/Algebra/Category/Ring/LinearAlgebra.lean,Mathlib/Algebra/Colimit/Module.lean,Mathlib/Algebra/Field/Equiv.lean,Mathlib/Algebra/Field/Subfield/Basic.lean,Mathlib/Algebra/Homology/BifunctorAssociator.lean,Mathlib/Algebra/Homology/CochainComplexPlus.lean,Mathlib/Algebra/Homology/DerivedCategory/Basic.lean,Mathlib/Algebra/Homology/DerivedCategory/ExactFunctor.lean,Mathlib/Algebra/Homology/DerivedCategory/Linear.lean,Mathlib/Algebra/Homology/Embedding/CochainComplex.lean,Mathlib/Algebra/Homology/Embedding/TruncLE.lean,Mathlib/Algebra/Homology/Embedding/TruncLEHomology.lean,Mathlib/Algebra/Homology/Functor.lean,Mathlib/Algebra/Homology/HomotopyCategory/HomComplexCohomology.lean,Mathlib/Algebra/Homology/HomotopyCategory/SingleFunctors.lean,Mathlib/Algebra/Homology/Monoidal.lean,Mathlib/Algebra/Lie/Abelian.lean,Mathlib/Algebra/Lie/Derivation/Basic.lean,Mathlib/Algebra/Lie/Free.lean,Mathlib/Algebra/Lie/LieTheorem.lean,Mathlib/Algebra/Lie/NonUnitalNonAssocAlgebra.lean,Mathlib/Algebra/Lie/Quotient.lean,Mathlib/Algebra/Module/CharacterModule.lean,Mathlib/Algebra/Module/LocalizedModule/Basic.lean,Mathlib/Algebra/Module/LocalizedModule/Submodule.lean,Mathlib/Algebra/Module/Presentation/Finite.lean,Mathlib/Algebra/MvPolynomial/Basic.lean,Mathlib/Algebra/MvPolynomial/Nilpotent.lean,Mathlib/Algebra/Order/Floor/Ring.lean,Mathlib/Algebra/Order/Floor/Semifield.lean,Mathlib/Algebra/Order/Group/Unbundled/Abs.lean,Mathlib/Algebra/Order/Ring/StandardPart.lean,Mathlib/Algebra/Polynomial/Module/AEval.lean,Mathlib/Algebra/Polynomial/Module/Basic.lean,Mathlib/Algebra/Quandle.lean,Mathlib/Algebra/Quaternion.lean,Mathlib/Algebra/Ring/Subring/Basic.lean,Mathlib/Algebra/Star/NonUnitalSubalgebra.lean,Mathlib/Algebra/Star/StarAlgHom.lean,Mathlib/Algebra/Star/Unitary.lean,Mathlib/AlgebraicGeometry/AffineScheme.lean,Mathlib/AlgebraicGeometry/AffineSpace.lean,Mathlib/AlgebraicGeometry/AffineTransitionLimit.lean,Mathlib/AlgebraicGeometry/Artinian.lean,Mathlib/AlgebraicGeometry/FunctionField.lean,Mathlib/AlgebraicGeometry/Geometrically/Basic.lean,Mathlib/AlgebraicGeometry/Gluing.lean,Mathlib/AlgebraicGeometry/Group/Abelian.lean,Mathlib/AlgebraicGeometry/IdealSheaf/Basic.lean,Mathlib/AlgebraicGeometry/IdealSheaf/IrreducibleComponent.lean,Mathlib/AlgebraicGeometry/Limits.lean,Mathlib/AlgebraicGeometry/LimitsOver.lean,Mathlib/AlgebraicGeometry/Modules/Sheaf.lean,Mathlib/AlgebraicGeometry/Modules/Tilde.lean,Mathlib/AlgebraicGeometry/Morphisms/Basic.lean,Mathlib/AlgebraicGeometry/Morphisms/ClosedImmersion.lean,Mathlib/AlgebraicGeometry/Morphisms/Finite.lean,Mathlib/AlgebraicGeometry/Morphisms/FinitePresentation.lean,Mathlib/AlgebraicGeometry/Morphisms/FiniteType.lean,Mathlib/AlgebraicGeometry/Morphisms/Flat.lean,Mathlib/AlgebraicGeometry/Morphisms/FormallyUnramified.lean,Mathlib/AlgebraicGeometry/Morphisms/Immersion.lean,Mathlib/AlgebraicGeometry/Morphisms/Integral.lean,Mathlib/AlgebraicGeometry/Morphisms/IsIso.lean,Mathlib/AlgebraicGeometry/Morphisms/OpenImmersion.lean,Mathlib/AlgebraicGeometry/Morphisms/Proper.lean,Mathlib/AlgebraicGeometry/Morphisms/QuasiFinite.lean,Mathlib/AlgebraicGeometry/Morphisms/RingHomProperties.lean,Mathlib/AlgebraicGeometry/Morphisms/SchemeTheoreticallyDominant.lean,Mathlib/AlgebraicGeometry/Morphisms/Separated.lean,Mathlib/AlgebraicGeometry/Morphisms/UniversallyOpen.lean,Mathlib/AlgebraicGeometry/Noetherian.lean 523 3 ['github-actions', 'mathlib-merge-conflicts'] nobody
3-56266
3 days ago
4-17872
4 days ago
0-169
2 minutes
36575 dagurtomas
author:dagurtomas
 modifications to #35871 --- So this doesn't appear on the queue: - [ ] depends on: #35871 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) t-category-theory merge-conflict 47/51 Mathlib/AlgebraicGeometry/Morphisms/Finite.lean,Mathlib/AlgebraicGeometry/Morphisms/FlatDescent.lean,Mathlib/CategoryTheory/Limits/Shapes/Pullback/IsPullback/Basic.lean,Mathlib/CategoryTheory/MorphismProperty/Basic.lean,Mathlib/CategoryTheory/MorphismProperty/Limits.lean 5 4 ['github-actions', 'mathlib-dependent-issues', 'mathlib-merge-conflicts'] nobody
3-56264
3 days ago
4-13458
4 days ago
0-11
11 seconds
36530 kim-em
author:kim-em
 experiment: how many `inferInstanceAs` can be replaced with `inferInstanceAs%` (#35950 version) large-import merge-conflict 480/12 Mathlib.lean,Mathlib/Algebra/Order/Ring/StandardPart.lean,Mathlib/Init.lean,Mathlib/Tactic.lean,Mathlib/Tactic/InferInstanceAsPercent.lean,MathlibTest/InferInstanceAsPercent.lean 6 3 ['github-actions', 'mathlib-merge-conflicts'] nobody
0-77747
21 hours ago
4-63001
4 days ago
0-65
1 minute
36613 dagurtomas
author:dagurtomas
 Typecat refactor 3 --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) 3449/2842 Mathlib/Algebra/Category/AlgCat/Basic.lean,Mathlib/Algebra/Category/AlgCat/Limits.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/CartesianMonoidal.lean,Mathlib/Algebra/Category/Grp/EpiMono.lean,Mathlib/Algebra/Category/Grp/LeftExactFunctor.lean,Mathlib/Algebra/Category/Grp/Limits.lean,Mathlib/Algebra/Category/Grp/Yoneda.lean,Mathlib/Algebra/Category/ModuleCat/Adjunctions.lean,Mathlib/Algebra/Category/ModuleCat/Basic.lean,Mathlib/Algebra/Category/ModuleCat/EpiMono.lean,Mathlib/Algebra/Category/ModuleCat/FilteredColimits.lean,Mathlib/Algebra/Category/ModuleCat/LeftResolution.lean,Mathlib/Algebra/Category/ModuleCat/Limits.lean,Mathlib/Algebra/Category/ModuleCat/Presheaf.lean,Mathlib/Algebra/Category/ModuleCat/Presheaf/EpiMono.lean,Mathlib/Algebra/Category/ModuleCat/Presheaf/Free.lean,Mathlib/Algebra/Category/ModuleCat/Presheaf/Generator.lean,Mathlib/Algebra/Category/ModuleCat/Presheaf/Sheafify.lean,Mathlib/Algebra/Category/ModuleCat/Semi.lean,Mathlib/Algebra/Category/ModuleCat/Sheaf.lean,Mathlib/Algebra/Category/ModuleCat/Sheaf/Free.lean,Mathlib/Algebra/Category/ModuleCat/Sheaf/PullbackFree.lean,Mathlib/Algebra/Category/ModuleCat/Stalk.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/MonCat/Yoneda.lean,Mathlib/Algebra/Category/Ring/Adjunctions.lean,Mathlib/Algebra/Category/Ring/Basic.lean,Mathlib/Algebra/Category/Ring/Constructions.lean,Mathlib/Algebra/Category/Ring/FilteredColimits.lean,Mathlib/Algebra/Category/Ring/Limits.lean,Mathlib/Algebra/Category/Semigrp/Basic.lean,Mathlib/Algebra/Homology/HomotopyCategory/ShortExact.lean,Mathlib/Algebra/Homology/ShortComplex/ConcreteCategory.lean,Mathlib/AlgebraicGeometry/AffineScheme.lean,Mathlib/AlgebraicGeometry/AffineSpace.lean,Mathlib/AlgebraicGeometry/AffineTransitionLimit.lean,Mathlib/AlgebraicGeometry/Cover/Directed.lean,Mathlib/AlgebraicGeometry/Gluing.lean,Mathlib/AlgebraicGeometry/IdealSheaf/Subscheme.lean,Mathlib/AlgebraicGeometry/Normalization.lean,Mathlib/AlgebraicGeometry/RelativeGluing.lean,Mathlib/AlgebraicGeometry/Scheme.lean,Mathlib/AlgebraicGeometry/Sites/ConstantSheaf.lean,Mathlib/AlgebraicGeometry/Sites/MorphismProperty.lean,Mathlib/AlgebraicGeometry/Sites/Representability.lean,Mathlib/AlgebraicTopology/ExtraDegeneracy.lean,Mathlib/AlgebraicTopology/Quasicategory/StrictSegal.lean,Mathlib/AlgebraicTopology/SimplexCategory/Basic.lean,Mathlib/AlgebraicTopology/SimplexCategory/Defs.lean,Mathlib/AlgebraicTopology/SimplicialNerve.lean,Mathlib/AlgebraicTopology/SimplicialSet/Basic.lean,Mathlib/AlgebraicTopology/SimplicialSet/Coskeletal.lean,Mathlib/AlgebraicTopology/SimplicialSet/Degenerate.lean,Mathlib/AlgebraicTopology/SimplicialSet/Dimension.lean,Mathlib/AlgebraicTopology/SimplicialSet/Finite.lean,Mathlib/AlgebraicTopology/SimplicialSet/HoFunctorMonoidal.lean,Mathlib/AlgebraicTopology/SimplicialSet/HomotopyCat.lean,Mathlib/AlgebraicTopology/SimplicialSet/Horn.lean,Mathlib/AlgebraicTopology/SimplicialSet/Monoidal.lean,Mathlib/AlgebraicTopology/SimplicialSet/Nerve.lean,Mathlib/AlgebraicTopology/SimplicialSet/NerveAdjunction.lean,Mathlib/AlgebraicTopology/SimplicialSet/NerveNondegenerate.lean,Mathlib/AlgebraicTopology/SimplicialSet/NonDegenerateSimplices.lean,Mathlib/AlgebraicTopology/SimplicialSet/Path.lean,Mathlib/AlgebraicTopology/SimplicialSet/RelativeMorphism.lean,Mathlib/AlgebraicTopology/SimplicialSet/StdSimplex.lean,Mathlib/AlgebraicTopology/SimplicialSet/StrictSegal.lean,Mathlib/AlgebraicTopology/SimplicialSet/Subcomplex.lean,Mathlib/AlgebraicTopology/SingularSet.lean,Mathlib/Analysis/Normed/Group/SemiNormedGrp.lean,Mathlib/CategoryTheory/Action.lean,Mathlib/CategoryTheory/Action/Basic.lean,Mathlib/CategoryTheory/Action/Concrete.lean,Mathlib/CategoryTheory/Action/Monoidal.lean,Mathlib/CategoryTheory/Adhesive/Basic.lean,Mathlib/CategoryTheory/Adjunction/Limits.lean,Mathlib/CategoryTheory/Adjunction/Opposites.lean,Mathlib/CategoryTheory/Category/Cat.lean,Mathlib/CategoryTheory/Category/Cat/Adjunction.lean,Mathlib/CategoryTheory/Category/Cat/Limit.lean,Mathlib/CategoryTheory/Category/PartialFun.lean,Mathlib/CategoryTheory/Category/Pointed.lean,Mathlib/CategoryTheory/Category/RelCat.lean,Mathlib/CategoryTheory/CodiscreteCategory.lean,Mathlib/CategoryTheory/CofilteredSystem.lean,Mathlib/CategoryTheory/Comma/Presheaf/Basic.lean,Mathlib/CategoryTheory/ConcreteCategory/Basic.lean,Mathlib/CategoryTheory/ConcreteCategory/Elementwise.lean,Mathlib/CategoryTheory/ConcreteCategory/EpiMono.lean,Mathlib/CategoryTheory/ConcreteCategory/Forget.lean,Mathlib/CategoryTheory/ConcreteCategory/Representable.lean,Mathlib/CategoryTheory/Core.lean,Mathlib/CategoryTheory/Elements.lean 299 2 ['github-actions'] nobody
0-1982
33 minutes ago
0-1219
19 minutes ago
0-6624
1 hour

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
35976 Phelixh
author:Phelixh
 feat: add add Liu's uncertainty theory foundations (core/distribution/process modules) --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor 2320/0 Mathlib/Uncertainty/base.lean,Mathlib/Uncertainty/base_core.lean,Mathlib/Uncertainty/base_distribution.lean,Mathlib/Uncertainty/base_process.lean,Mathlib/Uncertainty/uncertainty.lean 5 26 ['Phelixh', 'copilot-pull-request-reviewer', 'github-actions'] nobody
12-52145
12 days ago
13-76934
13 days ago
0-1739
28 minutes
36031 sgouezel
author:sgouezel
 feat: linter to make sure defs are `implicit_reducible` if they output classes Definitions outputting classes are here to be used as instances somewhere. If they are not implicit-reducible, then this use as instance is likely to encounter issues for defeq at instance reducibility. To fix this, this PR implements a linter detecting if class returning definitions are not marked as `implicit_reducible`, and fixes the whole library (using the iteration of a python script with manual tweaking). The linter is not perfect. In particular, the mechanism to disable it requires to be in a section. But I think it flags the right things. Marking setoids as implicit_reducible creates a performance issue (why is setoid a class, by the way?) so I disabled the linter around some of them. I'm not sure that it makes sense to mark all class returning defs as implicit_reducible (setoids are a counterexample, but Fintype is also probably not very sensible). We could have a whitelist of defs for which this is not needed if we decide we like this linter but want to improve it. On a side note, many many things in category theory are classes but have defs that construct them, so many many changes of the PR are in category theory. I have no opinion on whether this is desirable as I don't know the design decisions in this corner of the library. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) merge-conflict 1159/93 Mathlib/Algebra/Algebra/ZMod.lean,Mathlib/Algebra/BrauerGroup/Defs.lean,Mathlib/Algebra/Category/FGModuleCat/Colimits.lean,Mathlib/Algebra/Category/FGModuleCat/Limits.lean,Mathlib/Algebra/Category/Grp/Abelian.lean,Mathlib/Algebra/Category/ModuleCat/Abelian.lean,Mathlib/Algebra/Category/ModuleCat/EpiMono.lean,Mathlib/Algebra/Category/ModuleCat/Presheaf/Sheafify.lean,Mathlib/Algebra/CharP/Invertible.lean,Mathlib/Algebra/CharP/MixedCharZero.lean,Mathlib/Algebra/DirectSum/Decomposition.lean,Mathlib/Algebra/Field/IsField.lean,Mathlib/Algebra/FreeMonoid/Basic.lean,Mathlib/Algebra/GCDMonoid/Basic.lean,Mathlib/Algebra/Homology/ComplexShapeSigns.lean,Mathlib/Algebra/Lie/Basic.lean,Mathlib/Algebra/Lie/Classical.lean,Mathlib/Algebra/Lie/Extension.lean,Mathlib/Algebra/Module/GradedModule.lean,Mathlib/Algebra/Module/NatInt.lean,Mathlib/Algebra/Module/Submodule/Defs.lean,Mathlib/Algebra/Module/Torsion/Basic.lean,Mathlib/Algebra/MonoidAlgebra/Module.lean,Mathlib/Algebra/Order/Archimedean/Basic.lean,Mathlib/Algebra/Order/Floor/Defs.lean,Mathlib/Algebra/Polynomial/Div.lean,Mathlib/Algebra/SkewMonoidAlgebra/Basic.lean,Mathlib/Algebra/Star/RingQuot.lean,Mathlib/AlgebraicGeometry/Cover/Directed.lean,Mathlib/AlgebraicTopology/ModelCategory/Basic.lean,Mathlib/Analysis/CStarAlgebra/CStarMatrix.lean,Mathlib/Analysis/CStarAlgebra/Matrix.lean,Mathlib/Analysis/CStarAlgebra/Module/Defs.lean,Mathlib/Analysis/Complex/UpperHalfPlane/Metric.lean,Mathlib/Analysis/Distribution/TestFunction.lean,Mathlib/Analysis/InnerProductSpace/Basic.lean,Mathlib/Analysis/InnerProductSpace/Defs.lean,Mathlib/Analysis/InnerProductSpace/OfNorm.lean,Mathlib/Analysis/LocallyConvex/WithSeminorms.lean,Mathlib/Analysis/Matrix/Order.lean,Mathlib/Analysis/Matrix/PosDef.lean,Mathlib/Analysis/Normed/Algebra/Exponential.lean,Mathlib/Analysis/Normed/Field/Basic.lean,Mathlib/Analysis/Normed/Group/AddTorsor.lean,Mathlib/Analysis/Normed/Module/Basic.lean,Mathlib/Analysis/Normed/Ring/Basic.lean,Mathlib/Analysis/Normed/Unbundled/SpectralNorm.lean,Mathlib/Analysis/RCLike/Basic.lean,Mathlib/CategoryTheory/Abelian/Basic.lean,Mathlib/CategoryTheory/Abelian/NonPreadditive.lean,Mathlib/CategoryTheory/Abelian/Transfer.lean,Mathlib/CategoryTheory/Bicategory/Monad/Basic.lean,Mathlib/CategoryTheory/CatCommSq.lean,Mathlib/CategoryTheory/Center/Linear.lean,Mathlib/CategoryTheory/ConcreteCategory/Forget.lean,Mathlib/CategoryTheory/Enriched/Basic.lean,Mathlib/CategoryTheory/Enriched/FunctorCategory.lean,Mathlib/CategoryTheory/Enriched/Ordinary/Basic.lean,Mathlib/CategoryTheory/EpiMono.lean,Mathlib/CategoryTheory/FiberedCategory/HasFibers.lean,Mathlib/CategoryTheory/Functor/Functorial.lean,Mathlib/CategoryTheory/Groupoid.lean,Mathlib/CategoryTheory/Groupoid/Subgroupoid.lean,Mathlib/CategoryTheory/IsConnected.lean,Mathlib/CategoryTheory/Limits/Constructions/LimitsOfProductsAndEqualizers.lean,Mathlib/CategoryTheory/Limits/Creates.lean,Mathlib/CategoryTheory/Limits/Final.lean,Mathlib/CategoryTheory/Limits/FullSubcategory.lean,Mathlib/CategoryTheory/Limits/MorphismProperty.lean,Mathlib/CategoryTheory/Limits/Preorder.lean,Mathlib/CategoryTheory/Limits/Preserves/Creates/Finite.lean,Mathlib/CategoryTheory/Limits/Shapes/ConcreteCategory.lean,Mathlib/CategoryTheory/Limits/Shapes/NormalMono/Basic.lean,Mathlib/CategoryTheory/Limits/Shapes/ZeroMorphisms.lean,Mathlib/CategoryTheory/Localization/Bifunctor.lean,Mathlib/CategoryTheory/Localization/CalculusOfFractions/Preadditive.lean,Mathlib/CategoryTheory/Localization/HasLocalization.lean,Mathlib/CategoryTheory/Localization/Linear.lean,Mathlib/CategoryTheory/Localization/LocallySmall.lean,Mathlib/CategoryTheory/Localization/Monoidal/Functor.lean,Mathlib/CategoryTheory/Localization/Predicate.lean,Mathlib/CategoryTheory/Localization/Triangulated.lean,Mathlib/CategoryTheory/Localization/Trifunctor.lean,Mathlib/CategoryTheory/LocallyCartesianClosed/ChosenPullbacksAlong.lean,Mathlib/CategoryTheory/LocallyCartesianClosed/ExponentiableMorphism.lean,Mathlib/CategoryTheory/Monad/Comonadicity.lean,Mathlib/CategoryTheory/Monad/Limits.lean,Mathlib/CategoryTheory/Monad/Monadicity.lean,Mathlib/CategoryTheory/Monoidal/Action/End.lean,Mathlib/CategoryTheory/Monoidal/Action/Opposites.lean,Mathlib/CategoryTheory/Monoidal/Bimod.lean,Mathlib/CategoryTheory/Monoidal/Braided/Basic.lean,Mathlib/CategoryTheory/Monoidal/Braided/Multifunctor.lean,Mathlib/CategoryTheory/Monoidal/Braided/Reflection.lean,Mathlib/CategoryTheory/Monoidal/Cartesian/Basic.lean,Mathlib/CategoryTheory/Monoidal/Cartesian/CommGrp_.lean,Mathlib/CategoryTheory/Monoidal/Cartesian/Grp_.lean,Mathlib/CategoryTheory/Monoidal/Cartesian/Mon_.lean,Mathlib/CategoryTheory/Monoidal/Closed/Basic.lean,Mathlib/CategoryTheory/Monoidal/Closed/Cartesian.lean 341 2 ['github-actions', 'mathlib-merge-conflicts'] nobody
12-34657
12 days ago
12-77988
12 days ago
0-13675
3 hours
36072 erdOne
author:erdOne
 feat(AlgebraicGeometry): essential smallness of affine schemes locally of finite type over a base Co-authored-by: Joël Riou --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) delegated 151/2 Mathlib.lean,Mathlib/Algebra/Category/CommAlgCat/FiniteType.lean,Mathlib/Algebra/Category/Ring/Small.lean,Mathlib/AlgebraicGeometry/Morphisms/FiniteType.lean,Mathlib/CategoryTheory/MorphismProperty/Comma.lean,Mathlib/CategoryTheory/ObjectProperty/Small.lean 6 6 ['github-actions', 'joelriou', 'mathlib-bors', 'riccardobrasca'] nobody
11-51847
11 days ago
13-44060
13 days ago
13-45348
13 days
36224 gasparattila
author:gasparattila
 feat(Analysis/Normed/Affine): (pseudo)metric on `V →ᴬ[𝕜] Q` --- - [ ] depends on: #36083 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) blocked-by-other-PR 186/44 Mathlib/Analysis/Normed/Affine/ContinuousAffineMap.lean,Mathlib/Analysis/Normed/Group/AddTorsor.lean,Mathlib/Topology/Algebra/ContinuousAffineMap.lean 3 2 ['github-actions', 'mathlib-dependent-issues'] nobody
8-38390
8 days ago
11-30936
11 days ago
11-30891
11 days
36416 j-loreaux
author:j-loreaux
 feat(Analysis/CStarAlgebra): norms of sums of orthogonal selfadjoint elements --- - [ ] depends on: #36407 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) blocked-by-other-PR 150/0 Mathlib/Analysis/CStarAlgebra/GelfandDuality.lean,Mathlib/Topology/ContinuousMap/Bounded/Normed.lean,Mathlib/Topology/ContinuousMap/Compact.lean 3 5 ['github-actions', 'mathlib-dependent-issues', 'themathqueen'] nobody
7-32131
7 days ago
7-35587
7 days ago
7-35542
7 days
36419 AntoineChambert-Loir
author:AntoineChambert-Loir
 feat(RingTheory/DividedPowerAlgebra/Init): add a computation lemma Add a lemma `DividedPowerAlgebra.pow_dp`. Co-authored with: @mariainesdff --- - [ ] depends on: #35804 - [ ] depends on: #35830 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) blocked-by-other-PR 433/20 Mathlib.lean,Mathlib/Analysis/Calculus/ContDiff/Bounds.lean,Mathlib/Data/List/ToFinsupp.lean,Mathlib/Data/Nat/Choose/Multinomial.lean,Mathlib/RingTheory/DividedPowerAlgebra/Init.lean 5 2 ['github-actions', 'mathlib-dependent-issues'] nobody
7-26337
7 days ago
7-28102
7 days ago
7-28057
7 days
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 merge-conflict 527/0 Mathlib.lean,Mathlib/Data/Set/Accumulate.lean,Mathlib/Data/Set/Dissipate.lean,Mathlib/MeasureTheory/PiSystem.lean,Mathlib/Topology/Compactness/CompactSystem.lean 5 3 ['github-actions', 'mathlib-dependent-issues', 'mathlib-merge-conflicts'] nobody
6-337
6 days ago
12-50489
12 days ago
0-4550
1 hour
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 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
6-336
6 days ago
12-22841
12 days ago
0-1847
30 minutes
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. --- - [ ] depends on: #36013 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) brownian merge-conflict 313/0 Mathlib.lean,Mathlib/Data/Set/Accumulate.lean,Mathlib/Data/Set/Dissipate.lean,Mathlib/MeasureTheory/PiSystem.lean,Mathlib/Topology/Compactness/CompactSystem.lean 5 3 ['github-actions', 'mathlib-dependent-issues', 'mathlib-merge-conflicts'] nobody
6-332
6 days ago
11-29345
11 days ago
11-29300
11 days
35991 xroblot
author:xroblot
 feat(RamificationInertia): decomposition field and inertia field of compositum --- - [ ] depends on: #35808 - [ ] depends on: #35493 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) large-import blocked-by-other-PR merge-conflict 645/36 Mathlib/Algebra/Group/Subgroup/Basic.lean,Mathlib/FieldTheory/Galois/Basic.lean,Mathlib/FieldTheory/Galois/IsGaloisGroup.lean,Mathlib/FieldTheory/IntermediateField/Algebraic.lean,Mathlib/NumberTheory/NumberField/Cyclotomic/Ideal.lean,Mathlib/NumberTheory/RamificationInertia/Basic.lean,Mathlib/NumberTheory/RamificationInertia/Galois.lean,Mathlib/NumberTheory/RamificationInertia/HilbertTheory.lean,Mathlib/RingTheory/Localization/AtPrime/Extension.lean 9 5 ['github-actions', 'mathlib-dependent-issues', 'mathlib-merge-conflicts'] nobody
5-28916
5 days ago
14-48317
14 days ago
0-316
5 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/) 24/29 Mathlib/Data/Nat/Init.lean,Mathlib/Logic/Equiv/Fin/Basic.lean 2 2 ['JovanGerb', 'github-actions'] nobody
4-73609
4 days ago
6-8259
6 days ago
0-4657
1 hour
36166 wwylele
author:wwylele
 feat(Data/Nat): formula for cardinal of finsuppAntidiag on Nat Co-authored-by: Bingyu Xia --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) maintainer-merge 82/0 Mathlib.lean,Mathlib/Algebra/Order/Antidiag/FinsuppEquiv.lean 2 16 ['BryceT233', 'copilot-pull-request-reviewer', 'github-actions', 'tb65536', 'wwylele'] tb65536
assignee:tb65536
4-67188
4 days ago
5-25904
5 days ago
11-2502
11 days
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 4986/36 Mathlib.lean,Mathlib/Algebra/Category/ModuleCat/Baer.lean,Mathlib/Algebra/Category/ModuleCat/Ext/BaseChange.lean,Mathlib/Algebra/Category/ModuleCat/Ext/Ulift.lean,Mathlib/Algebra/Category/ModuleCat/InjectiveDimension.lean,Mathlib/Algebra/Homology/DerivedCategory/Basic.lean,Mathlib/Algebra/Homology/DerivedCategory/Ext/Bijection.lean,Mathlib/Algebra/Homology/DerivedCategory/Ext/Map.lean,Mathlib/Algebra/Homology/DerivedCategory/ShortExact.lean,Mathlib/Algebra/Homology/HomologicalComplexAbelian.lean,Mathlib/Algebra/Homology/HomotopyCategory/ShortExact.lean,Mathlib/Algebra/Homology/ShortComplex/ModuleCat.lean,Mathlib/Algebra/Module/FinitePresentation.lean,Mathlib/CategoryTheory/Abelian/Injective/Dimension.lean,Mathlib/CategoryTheory/Abelian/Projective/Dimension.lean,Mathlib/RingTheory/CohenMacaulay/Basic.lean,Mathlib/RingTheory/Flat/IsBaseChange.lean,Mathlib/RingTheory/Gorenstein/CohenMacaulay.lean,Mathlib/RingTheory/Gorenstein/Defs.lean,Mathlib/RingTheory/Ideal/Operations.lean,Mathlib/RingTheory/Ideal/Quotient/Operations.lean,Mathlib/RingTheory/Regular/Category.lean,Mathlib/RingTheory/Regular/Depth.lean,Mathlib/RingTheory/Regular/InjectiveDimension.lean,Mathlib/RingTheory/Regular/Ischebeck.lean,Mathlib/RingTheory/Regular/ProjectiveDimension.lean,Mathlib/RingTheory/Regular/RegularSequence.lean 27 2 ['github-actions', 'mathlib-dependent-issues'] nobody
4-62779
4 days ago
4-64947
4 days ago
4-64902
4 days
36163 mcdoll
author:mcdoll
 feat(Analysis/SpecialFunctions): `rpow` is locally integrable Local integrability of real powers. This is only of interest at the origin, where `‖x‖ ^ (-α)` is not bounded. Co-authored-by: Michael Douglas --- From https://github.com/mrdouglasny/OSforGFF and made mathlib ready by me [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) awaiting-author 71/0 Mathlib/Analysis/SpecialFunctions/Pow/Integral.lean,Mathlib/MeasureTheory/Constructions/HaarToSphere.lean 2 4 ['github-actions', 'j-loreaux'] nobody
4-30895
4 days ago
12-22299
12 days ago
12-22254
12 days
36376 jessealama
author:jessealama
 feat(SimpleGraph): bridge from Perm.IsCycle to IsHamiltonian This PR provides `IsHamiltonian.ofPerm`, 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/Combinatorics/SimpleGraph/Walks/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` - `Walk.iterate_length`, `Walk.iterate_getVert`, `Walk.iterate_support`, `Walk.iterate_edges`: 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`**: - `Perm.toList_eq_range_map_pow`: expresses `toList` as a range map over powers **`Mathlib/Combinatorics/SimpleGraph/Hamiltonian.lean`**: - `edge_ne_of_isCycleOn`: edge distinctness for cycle-on permutations - `IsHamiltonian.ofPerm`: the main theorem large-import 158/0 Mathlib.lean,Mathlib/Combinatorics/SimpleGraph/Hamiltonian.lean,Mathlib/Combinatorics/SimpleGraph/Walks/Iterate.lean,Mathlib/GroupTheory/Perm/Cycle/Basic.lean,Mathlib/GroupTheory/Perm/Cycle/Concrete.lean 5 33 ['SnirBroshi', 'github-actions', 'jessealama', 'mathlib-merge-conflicts'] nobody
3-68725
3 days ago
3-73725
3 days ago
6-81785
6 days
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/) blocked-by-other-PR merge-conflict 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
3-62652
3 days ago
4-22657
4 days ago
0-153
2 minutes
36638 CoolRmal
author:CoolRmal
 feat: if `f` lies in a closed convex set `s` almost everywhere, then its conditional expectation also lies in `s` almost everywhere --- - [ ] depends on: #27953 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) blocked-by-other-PR 350/22 Mathlib.lean,Mathlib/Algebra/Notation/Pi/Defs.lean,Mathlib/Analysis/Convex/Approximation.lean,Mathlib/MeasureTheory/Function/ConditionalExpectation/CondJensen.lean,Mathlib/MeasureTheory/MeasurableSpace/Constructions.lean,Mathlib/MeasureTheory/Measure/Restrict.lean,Mathlib/MeasureTheory/Measure/Typeclasses/SFinite.lean,Mathlib/Topology/Semicontinuity/Basic.lean 8 3 ['github-actions', 'mathlib-dependent-issues'] nobody
2-62857
2 days ago
2-64491
2 days ago
0-406
6 minutes
36605 martinwintermath
author:martinwintermath
 feat(Geometry/Convex/Cone): Add linear span for cones and lemmas about interaction between span and negation This PR introduces `linSpan` (linear span) as a short form of `Submodule.span` in the context of cones. This abbreviation allows for shorter, easier to parse lemma statement as well as more descriptive lemma names. This PR also introduces lemmas about the interaction of cone span, linear span and negation. This demonstrates the usefulness of `linSpan`. Co-authored-by: Olivia Röhrig, Kilian Rueß --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) 86/0 Mathlib/Geometry/Convex/Cone/Pointed.lean 1 1 ['github-actions'] nobody
2-61948
2 days ago
3-40164
3 days ago
3-41141
3 days
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 - [ ] depends on: #36137 - [x] depends on: #36184 - [ ] 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 526/112 Mathlib.lean,Mathlib/Algebra/GroupWithZero/Range.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/DedekindDomain/Ideal/Lemmas.lean,Mathlib/RingTheory/Valuation/Extension.lean,Mathlib/Topology/Algebra/Valued/WithVal.lean 10 8 ['github-actions', 'mathlib-merge-conflicts', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] nobody
1-60157
1 day ago
152-63413
152 days ago
0-13
13 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 546/113 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/DedekindDomain/Ideal/Lemmas.lean,Mathlib/RingTheory/Valuation/Extension.lean,Mathlib/Topology/Algebra/Valued/WithVal.lean 11 3 ['github-actions', 'mathlib-dependent-issues', 'mathlib-merge-conflicts'] nobody
1-60031
1 day ago
7-44860
7 days ago
0-264
4 minutes
30551 smmercuri
author:smmercuri
 feat: dimension formulae for infinite places above --- - [x] depends on: #27978 - [x] depends on: #27974 - [x] depends on: #29942 - [x] depends on: #29946 - [x] depends on: #36132 - [x] depends on: #36257 - [x] depends on: #36268 - [ ] depends on: #36353 - [x] depends on: #36393 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) blocked-by-other-PR 320/39 Mathlib.lean,Mathlib/Data/Set/Card.lean,Mathlib/Logic/Function/Basic.lean,Mathlib/NumberTheory/NumberField/Completion/InfinitePlace.lean,Mathlib/NumberTheory/NumberField/Completion/LiesOverInstances.lean,Mathlib/NumberTheory/NumberField/Completion/Ramification.lean,Mathlib/NumberTheory/NumberField/InfinitePlace/Embeddings.lean,Mathlib/NumberTheory/NumberField/InfinitePlace/Ramification.lean 8 8 ['github-actions', 'mathlib-dependent-issues', 'mathlib-merge-conflicts', 'mathlib4-merge-conflict-bot'] nobody
1-59814
1 day ago
153-51094
153 days ago
0-10
10 seconds
36275 smmercuri
author:smmercuri
 feat: norm for the finite adele ring of a number field --- - [ ] depends on: #35820 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) blocked-by-other-PR 184/8 Mathlib.lean,Mathlib/NumberTheory/NumberField/Completion/FinitePlace.lean,Mathlib/NumberTheory/NumberField/FiniteAdeleRing.lean,Mathlib/RingTheory/DedekindDomain/FiniteAdeleRing.lean,Mathlib/Topology/Algebra/Valued/NormedValued.lean 5 3 ['github-actions', 'mathlib-dependent-issues', 'mathlib-merge-conflicts'] nobody
1-57596
1 day ago
10-54902
10 days ago
0-8
8 seconds
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 245/10 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 7 6 ['github-actions', 'mathlib-dependent-issues', 'mathlib-merge-conflicts'] nobody
1-57581
1 day ago
38-67929
38 days ago
0-10
10 seconds
36083 gasparattila
author:gasparattila
 feat: decomposition of `ContinuousAffineMap` as an `Equiv` This PR defines an equivalence `(V →ᴬ[R] Q) ≃ Q × (V →L[R] W)`, plus `LinearEquiv` and `AffineEquiv` variants. To match the names of the new equivalences, `ContinuousAffineMap.toConstProdLinearMap` is also renamed. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) 154/13 Mathlib/Analysis/Normed/Affine/ContinuousAffineMap.lean,Mathlib/Topology/Algebra/ContinuousAffineMap.lean 2 5 ['dupuisf', 'gasparattila', 'github-actions'] dupuisf
assignee:dupuisf
1-49861
1 day ago
13-24502
13 days ago
13-26410
13 days
36611 AntoineChambert-Loir
author:AntoineChambert-Loir
 feat(Data/Nat/Choose/Multinomial): rename Multiset.multinomial Rename `Multiset.multinomial` to `Multiset.countPerms`. See Zulip thread : [#mathlib4 > Multinomial coefficients](https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/Multinomial.20coefficients/with/576343071) This will be used in #35830 to allow another, more natural, definition of `Multiset.multinomial`. Co-authored with: @mariainesdff --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) 24/22 Mathlib/Analysis/Calculus/ContDiff/Bounds.lean,Mathlib/Data/Nat/Choose/Multinomial.lean 2 14 ['AntoineChambert-Loir', 'SnirBroshi', 'github-actions', 'vihdzp'] nobody
1-44812
1 day ago
1-44877
1 day ago
3-42156
3 days
36421 ROTARTSI82
author:ROTARTSI82
 feat(RingTheory/IsAdjoinRoot): add mkOfAdjoinEqTop' Alternative hypothesis to existing theorem: prove the result from a `Module.Free `hypothesis instead of `IsIntegrallyClosed`. If `α` generates `S` as an algebra, then `S` is given by adjoining a root of `minpoly R α`. --- Hello, we are the Algebraic Geometry group from the UW Math AI lab, and this is our first PR! This definition of `mkOfAdjoinEqTop'` generalizes the existing `mkOfAdjoinEqTop` and shows the result from `Module.Free` instead of `IsIntegrallyClosed`. It is used in future results that we would like to upstream at https://github.com/uw-math-ai/monogenic-extensions, which is a project to formalize lemmas 3.1 and 3.2 from https://arxiv.org/abs/2503.07846. Co-authored-by: George Peykanu Co-authored-by: Bryan Boehnke Co-authored-by: Bianca Viray <67076332+b-viray@users.noreply.github.com> --> [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor large-import 57/0 Mathlib/FieldTheory/Minpoly/Basic.lean,Mathlib/RingTheory/IsAdjoinRoot.lean 2 3 ['ROTARTSI82', 'github-actions'] dupuisf
assignee:dupuisf
1-18611
1 day ago
7-20090
7 days ago
7-20045
7 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. --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) 171/0 Mathlib/CategoryTheory/Abelian/Injective/Dimension.lean,Mathlib/CategoryTheory/Abelian/Projective/Dimension.lean,Mathlib/Data/ENat/Basic.lean 3 1 ['github-actions'] nobody
0-83388
23 hours ago
2-55473
2 days ago
2-55428
2 days
36439 xgenereux
author:xgenereux
 feat(Algebra/Adjoin): CoeT instances for Algebra.adjoin on singletons Is it 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/) 9/3 Mathlib/Algebra/Algebra/Subalgebra/Lattice.lean,Mathlib/RingTheory/Adjoin/Polynomial/Basic.lean 2 1 ['github-actions'] nobody
0-72726
20 hours ago
6-61328
6 days ago
6-61283
6 days
34773 semaraugusto
author:semaraugusto
 feat(InformationTheory): add Shannon entropy for probability mass functions Add Shannon entropy for probability mass functions This PR defines the Shannon entropy of a probability mass function as an ℝ-valued infinite sum using `Real.negMulLog`, and proves basic properties and standard computations. Main results include: * entropy is nonnegative; * entropy vanishes iff the PMF is deterministic (`PMF.pure`); * entropy is strictly positive for non-pure PMFs; * entropy of a Bernoulli PMF coincides with `Real.binEntropy`; * entropy of uniform distributions is `log` of the cardinality, both for `PMF.uniformOfFintype` and `PMF.uniformOfFinset`. Several small helper lemmas isolate technical arguments about supports, coercions from `ℝ≥0∞`, and bounds on infinite sums, in order to keep the main proofs readable. See the [Zulip discussion](https://leanprover.zulipchat.com/#narrow/channel/113489-new-members/topic/generic.20shannon.20entropy.20formalization.20mathlib4/with/570643335). --- I used ChatGPT for some proof structuring and refactoring suggestions, but all proofs were manually checked and adapted. I verified the arguments and adjusted naming and structure to follow mathlib conventions. The proof of shannonEntropy_eq_log_card_sub_toReal_klDiv_uniformOfFintype and some of its helper lemmas were initially generated using Codex. I manually reviewed the generated proof, checked each step, and refactored the code and naming to follow mathlib conventions. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) new-contributor awaiting-author LLM-generated 417/0 Mathlib.lean,Mathlib/Analysis/SpecialFunctions/Log/NegMulLog.lean,Mathlib/InformationTheory/Entropy.lean 3 13 ['adomasbaliuka', 'dupuisf', 'github-actions', 'mathlib-merge-conflicts', 'mattrobball', 'semaraugusto', 'wwylele'] dupuisf and sgouezel
assignee:sgouezel assignee:dupuisf
0-54563
15 hours ago
32-38380
32 days ago
9-18104
9 days
36582 kim-em
author:kim-em
 feat: run inferInstanceAs% normalization when deriving This PR intercepts `def ... deriving ...` and `deriving instance ... for ...` commands that use the delta deriving handler, and runs the `normalizeInstance` machinery from `inferInstanceAs%` on the synthesized instances. This fixes carrier type leakage at `reducibleAndInstances` transparency for all delta-derived instances across Mathlib. The implementation copies `mkInst` and `processDefDeriving` from `Lean.Elab.Deriving.Basic` (Lean 4.29.0-rc6) and adds the normalization step. This is intentionally a temporary copy: once we settle on the right behavior, it will be upstreamed into Lean 4. - [ ] depends on: #35950 🤖 Prepared with Claude Code large-import blocked-by-other-PR LLM-generated 353/3 Mathlib/Init.lean,Mathlib/Tactic/DerivingInferInstanceAs.lean,Mathlib/Tactic/InferInstanceAsPercent.lean,MathlibTest/DerivingInferInstanceAs.lean 4 2 ['github-actions', 'mathlib-dependent-issues'] nobody
0-54297
15 hours ago
4-7280
4 days ago
0-218
3 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 - [ ] depends on: #36391. [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) blocked-by-other-PR large-import 973/16 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/Basic.lean,Mathlib/NumberTheory/RamificationInertia/Galois.lean,Mathlib/NumberTheory/RamificationInertia/HilbertTheory.lean,Mathlib/RingTheory/Ideal/Galois.lean,Mathlib/RingTheory/Invariant/Basic.lean 12 2 ['github-actions', 'mathlib-dependent-issues'] nobody
0-51239
14 hours ago
0-56874
15 hours ago
0-48
48 seconds
36262 CBirkbeck
author:CBirkbeck
 feat(NumberTheory/ModularForms): modular discriminant as a cusp form ## Summary This PR constructs the modular discriminant `Δ(z) = η(z)^24` and proves it is a cusp form of weight 12 and level 1. The dominated convergence for infinite products is proved by reducing to the additive Tannery theorem via the formal expansion `∏ (1 + f i) = ∑ₛ ∏ᵢ∈ₛ f i`. ### New files - `Mathlib/Analysis/Normed/Ring/InfiniteProd.lean`: Dominated convergence theorem for infinite products of the form `∏' k, (1 + f n k)` in a complete normed commutative ring, proved via Tannery's theorem. - `Mathlib/NumberTheory/ModularForms/Discriminant.lean`: The modular discriminant `Δ`, its q-expansion, non-vanishing, and slash-invariance under the generators of SL(2,ℤ). ### New declarations in existing files - `Real.prod_one_add_le_exp_sum` in `Mathlib/Analysis/Complex/Exponential.lean`: `∏ᵢ∈ₛ (1 + f i) ≤ exp(∑ᵢ∈ₛ f i)` for nonneg `f`. - `summable_finset_prod_of_summable_nonneg` in `Mathlib/Analysis/SpecialFunctions/Log/Summable.lean`: if `f` is nonneg and summable, then `∑ₛ ∏ᵢ∈ₛ f i` is summable. - `summable_finset_prod_of_summable_norm` in `Mathlib/Analysis/SpecialFunctions/Log/Summable.lean`: normed ring version of the above. ### Key results - `ModularForm.discriminantCuspForm`: `Δ` bundled as a `CuspForm (Γ(1)) 12`. - `tendsto_tprod_one_add_of_dominated_convergence`: Dominated convergence for infinite products. ### Note - `ModularForms/Delta.lean` has been renamed to `ModularForms/Discriminant.lean` to be more in line with the literature. --- file-removed 185/25 Mathlib.lean,Mathlib/Analysis/Complex/Exponential.lean,Mathlib/Analysis/Normed/Ring/InfiniteProd.lean,Mathlib/Analysis/SpecialFunctions/Log/Summable.lean,Mathlib/NumberTheory/ModularForms/Cusps.lean,Mathlib/NumberTheory/ModularForms/Discriminant.lean,Mathlib/NumberTheory/ModularForms/Identities.lean,Mathlib/NumberTheory/ModularForms/LevelOne.lean 8 19 ['CBirkbeck', 'github-actions', 'loefflerd', 'mathlib-merge-conflicts', 'wwylele'] loefflerd
assignee:loefflerd
0-28323
7 hours ago
1-74830
1 day ago
0-1085
18 minutes
36715 vihdzp
author:vihdzp
 feat: `IsCofinal s` implies `IsCofinal (f '' s)` --- [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/from-referrer/) 26/15 Mathlib/Order/Cofinal.lean,Mathlib/SetTheory/Cardinal/Cofinality.lean 2 1 ['github-actions'] nobody
0-20015
5 hours ago
1-4006
1 day ago
1-3961
1 day
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 316/80 Mathlib/Tactic/DefEqAbuse.lean,Mathlib/Tactic/FastInstance.lean,MathlibTest/CheckInstance.lean,MathlibTest/DefEqAbuse.lean 4 14 ['eric-wieser', 'github-actions', 'kim-em'] nobody
0-11514
3 hours ago
0-75529
20 hours ago
1-5363
1 day

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