Are you a maintainer with just a short amount of time? The following kinds of pull requests could be relevant for you.
| Number |
Author |
Title |
Description |
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Modified files (first 100) |
📝 |
💬 |
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Assignee(s) |
Updated |
Last status change |
total time in review |
| 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.
---
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|
t-analysis
awaiting-author
maintainer-merge
|
470/12 |
Mathlib/Analysis/Calculus/ParametricIntegral.lean,Mathlib/Analysis/Calculus/ParametricIntervalIntegral.lean,Mathlib/MeasureTheory/Integral/DominatedConvergence.lean,Mathlib/Topology/NhdsWithin.lean,Mathlib/Topology/Separation/Regular.lean |
5 |
36 |
['fpvandoorn', 'github-actions', 'j-loreaux', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot', 'peabrainiac', 'sgouezel'] |
j-loreaux assignee:j-loreaux |
131-35530 4 months ago |
131-35530 131 days ago |
22-14837 22 days |
| 37057 |
erdOne author:erdOne |
feat(AlgebraicTopology): `SimplexCategory.toTop_map_δ_apply` |
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t-algebraic-topology
maintainer-merge
awaiting-author
merge-conflict
|
48/2 |
Mathlib/AlgebraicTopology/CechNerve.lean,Mathlib/AlgebraicTopology/SimplexCategory/Basic.lean,Mathlib/AlgebraicTopology/SimplexCategory/Defs.lean,Mathlib/AlgebraicTopology/TopologicalSimplex.lean,Mathlib/Data/Fin/SuccPred.lean |
5 |
17 |
['Raph-DG', 'dagurtomas', 'erdOne', 'github-actions', 'joelriou', 'mathlib-merge-conflicts', 'riccardobrasca'] |
robin-carlier assignee:robin-carlier |
75-54420 2 months ago |
77-15660 77 days ago |
4-43742 4 days |
| 37420 |
artie2000 author:artie2000 |
refactor: change definitions to avoid `ConvexCone` |
Change the definitions of `PointedCone.positive` and `PointedCone.closure` to avoid mentioning `ConvexCone`.
This PR is part of a series deprecating `ConvexCone`: https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/Replacing.20.60ConvexCone.60.20with.20.60PointedCone.60/with/582738985
---
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|
t-convex-geometry
maintainer-merge
|
10/4 |
Mathlib/Analysis/Convex/Cone/Closure.lean,Mathlib/Geometry/Convex/Cone/Pointed.lean |
2 |
3 |
['YaelDillies', 'github-actions', 'mathlib-merge-conflicts', 'ooovi', 'vihdzp'] |
nobody |
67-34014 2 months ago |
67-33262 67 days ago |
82-52284 82 days |
| 37603 |
Parcly-Taxel author:Parcly-Taxel |
refactor: review of `SetSemiring` |
* Rename `Set.up` and `SetSemiring.down` to `SetSemiring.ofSet` and `SetSemiring.toSet` respectively. Unprotect both and make them equivalences, following `FreeMonoid`.
* Derive `CompleteAtomicBooleanAlgebra` for `SetSemiring` immediately.
* Add `imageHom_id` and `imageHom_comp`. The three existing lemmas about `imageHom` are coalesced into `imageHom_apply`.
Ultimately inspired by https://github.com/leanprover-community/mathlib4/pull/36934#issuecomment-4183475568. |
maintainer-merge
merge-conflict
|
120/165 |
Mathlib/Algebra/Algebra/Operations.lean,Mathlib/Data/Set/Semiring.lean |
2 |
42 |
['Parcly-Taxel', 'YaelDillies', 'eric-wieser', 'github-actions', 'mathlib-merge-conflicts', 'sgouezel'] |
nobody |
53-75998 1 month ago |
53-75999 53 days ago |
22-34679 22 days |
| 38358 |
yuanyi-350 author:yuanyi-350 |
doc(1000.yaml): note more formalised theorems |
---
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|
documentation
maintainer-merge
|
9/2 |
docs/1000.yaml |
1 |
12 |
['YaelDillies', 'github-actions', 'grunweg', 'vihdzp', 'yuanyi-350'] |
nobody |
50-41016 1 month ago |
50-40457 50 days ago |
61-36798 61 days |
| 37053 |
artie2000 author:artie2000 |
refactor(Analysis/Convex/Cone): use `PointedCone` in Riesz extension theorem |
Change the statement of the Riesz extension theorem to take a `PointedCone` rather than a `ConvexCone`.
This PR is part of a series replacing `ConvexCone` with `PointedCone`. https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/Replacing.20.60ConvexCone.60.20with.20.60PointedCone.60/near/581184307
---
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|
t-convex-geometry
maintainer-merge
merge-conflict
|
15/12 |
Mathlib/Analysis/Convex/Cone/Extension.lean,Mathlib/Geometry/Convex/Cone/Pointed.lean |
2 |
9 |
['YaelDillies', 'artie2000', 'github-actions', 'mathlib-merge-conflicts', 'ocfnash'] |
nobody |
41-84211 1 month ago |
41-84212 41 days ago |
46-64967 46 days |
| 37928 |
AlexeyMilovanov author:AlexeyMilovanov |
refactor(Computability.Encoding): unbundle Γ and remove FinEncoding |
This PR unbundles the alphabet `Γ` from the `Encoding` structure and completely removes `FinEncoding`.
`Encoding`: The alphabet `Γ` is now an explicit parameter: `structure Encoding (α : Type u) (Γ : Type v)`.
`FinEncoding`: Removed. Finiteness is now handled via standard typeclasses (e.g., `[Fintype Γ] (e : Encoding α Γ)`).
Combinators: Functions like `finEncodingPair` are simplified to `encodingPair`, dropping the `fin` prefix and `[Fintype]` requirements where no longer needed.
Downstream: Mechanically updated `Mathlib.Computability` and `Mathlib.ModelTheory` to pass the explicit `Γ` and use `[Fintype Γ]` where `FinEncoding` was previously required.
|
new-contributor
maintainer-merge
|
87/67 |
Mathlib/Computability/Encoding.lean,Mathlib/ModelTheory/Encoding.lean |
2 |
9 |
['AlexeyMilovanov', 'dagurtomas', 'github-actions', 'vihdzp'] |
nobody |
39-76557 1 month ago |
46-41135 46 days ago |
72-18925 72 days |
| 37722 |
SabrinaJewson author:SabrinaJewson |
feat(Order/Cover): intervals equal singletons iff |
To complement `Set.Icc_eq_singleton_iff`, this introduces:
- `Set.Ioc_eq_singleton_iff` / `Set.Ico_eq_singleton_iff`
- `Set.Ico_eq_singleton_left_iff` / `Set.Ioc_eq_singleton_right_iff`
- `Set.Ioi_eq_singleton_iff` / `Set.Iio_eq_singleton_iff`
- `Set.Ioi_eq_singleton_top_iff` / `Set.Iio_eq_singleton_bot_iff`
- `Set.Ioo_eq_singleton_iff`
---
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|
t-order
new-contributor
awaiting-author
maintainer-merge
|
39/0 |
Mathlib/Order/Atoms.lean,Mathlib/Order/Cover.lean |
2 |
16 |
['Komyyy', 'SabrinaJewson', 'github-actions', 'mathlib-merge-conflicts'] |
bryangingechen assignee:bryangingechen |
39-9648 1 month ago |
41-49005 41 days ago |
35-7103 35 days |
| 39202 |
FordUniver author:FordUniver |
feat(Analysis/Calculus/Gradient): add `toDual_gradient` and companions |
Add `toDual_gradient`, `toDual_gradientWithin`, and the composed variants `toDual_comp_gradient`, `toDual_comp_gradientWithin` — the natural inverse direction of the gradient's defining equation `∇ f x := (toDual 𝕜 F).symm (fderiv 𝕜 f x)`. These identify `(toDual 𝕜 F) (∇ f x)` with `fderiv 𝕜 f x` (and the `gradientWithin` and composed forms with the corresponding fderiv versions), making the Riesz isomorphism between the two derivative views explicit. The proofs of `DifferentiableAt.hasGradientAt` and `DifferentiableWithinAt.hasGradientWithinAt` in the same file are simplified to use them.
Co-authored-by: Sebastian Pokutta <23001135+pokutta@users.noreply.github.com>
---
Came up while formalizing the descent lemma for Lipschitz-smooth functions, where being able to switch between `LipschitzWith K (fderiv ℝ f)` and `LipschitzWith K (∇ f)` is helpful, which with this PR becomes `toDual_comp_gradient ▸ (toDual ℝ F).isometry.lipschitzWith_iff K`. Also slightly simplifies two call sites in mathlib. |
maintainer-merge |
20/5 |
Mathlib/Analysis/Calculus/Gradient/Basic.lean |
1 |
5 |
['FordUniver', 'Komyyy', 'github-actions'] |
nobody |
25-35832 25 days ago |
36-10456 36 days ago |
42-21311 42 days |
| 39136 |
vihdzp author:vihdzp |
feat: more results on `Order.enum` |
Most importantly, we prove that the enumerator function of a cofinal set is normal iff the set is closed (under non-empty suprema).
---
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|
t-set-theory
t-order
maintainer-merge
|
90/7 |
Mathlib/Order/Cofinal.lean,Mathlib/SetTheory/Cardinal/Cofinality/Club.lean,Mathlib/SetTheory/Cardinal/Cofinality/Enum.lean,Mathlib/SetTheory/Ordinal/Topology.lean |
4 |
7 |
['YaelDillies', 'github-actions', 'mathlib-dependent-issues', 'mathlib-merge-conflicts', 'vihdzp'] |
nobody |
20-85450 20 days ago |
23-58565 23 days ago |
25-46529 25 days |
| 39975 |
gasparattila author:gasparattila |
chore: tag `(Continuous)LinearEquiv.prodCongr_symm` with `@[simp]` |
This is consistent with the other `prodCongr`s. Note that this also changes the type of `PiLp.sumPiLpEquivProdLpPiLp_symm_apply_ofLp`, which is now fully simplified.
---
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|
maintainer-merge |
5/5 |
Mathlib/LinearAlgebra/Prod.lean,Mathlib/MeasureTheory/Measure/Haar/InnerProductSpace.lean,Mathlib/Topology/Algebra/Module/Equiv.lean |
3 |
4 |
['github-actions', 'themathqueen'] |
nobody |
20-3875 20 days ago |
25-23148 25 days ago |
25-22551 25 days |
| 35753 |
Vilin97 author:Vilin97 |
feat(Topology/Algebra/Order): regular grid helpers and piecewise linear interpolation |
Make API for piecewise linear interpolation on regular grids. I need these to for ODE time-stepping methods, like forward Euler, and later Runge–Kutta methods.
Follow-up PR: #35755 (forward Euler method convergence).
I don't know if these numerical analysis ODE-solving methods even belong in mathlib. If someone could advise me on it, I would appreciate it.
---
The initial proof was produced by [Aristotle](https://aristotle.harmonic.fun). The code was iteratively refined (factoring out lemmas, golfing, simplifying proofs) using Claude Code.
- [ ] depends on: #38091 |
t-topology
new-contributor
LLM-generated
maintainer-merge
|
201/0 |
Mathlib.lean,Mathlib/Topology/Algebra/Order/PiecewiseLinear.lean |
2 |
59 |
['Vilin97', 'YanYablonovskiy', 'adomani', 'botbaki-review', 'copilot-pull-request-reviewer', 'dagurtomas', 'eric-wieser', 'github-actions', 'grunweg', 'j-loreaux', 'mathlib-dependent-issues', 'wwylele'] |
nobody |
18-72968 18 days ago |
51-83044 51 days ago |
84-36407 84 days |
| 37346 |
euprunin author:euprunin |
chore: golf using `grind` |
The goal of this PR is to decrease the number of times lemmas are called explicitly. Any decrease in compilation time is a welcome side effect, although it is not a primary objective.
Trace profiling results (differences <30 ms considered measurement noise):
* `✅️ SimpleGraph.Walk.IsPath.getVert_injOn`: unchanged 🎉
* `✅️ SimpleGraph.Walk.length_bypass_le`: unchanged 🎉
* `✅️ Rat.floor_intCast_div_natCast`: unchanged 🎉
* `✅️ InnerProductGeometry.norm_eq_of_angle_sub_eq_angle_sub_rev_of_angle_ne_pi`: unchanged 🎉
* `✅️ padicNorm.zero_of_padicNorm_eq_zero`: unchanged 🎉
Profiled using `set_option trace.profiler true in`.
---
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maintainer-merge
awaiting-zulip
merge-conflict
|
7/45 |
Mathlib/Combinatorics/SimpleGraph/Paths.lean,Mathlib/Data/Rat/Floor.lean,Mathlib/Geometry/Euclidean/Triangle.lean,Mathlib/NumberTheory/Padics/PadicNorm.lean |
4 |
23 |
['FernandoChu', 'bryangingechen', 'chenson2018', 'euprunin', 'faenuccio', 'github-actions', 'grunweg', 'mathlib-merge-conflicts'] |
nobody |
17-75564 17 days ago |
54-33293 54 days ago |
30-45859 30 days |
| 39956 |
SnirBroshi author:SnirBroshi |
feat(GroupTheory/IsPerfect): Grün's lemma |
Grün's lemma: In a perfect group (`commutator G = ⊤`), `center (G ⧸ center G) = ⊥`.
Also the `derivedSeries` and the `lowerCentralSeries` are a constant `⊤`, and the `upperCentralSeries` starts with `⊥` and afterwards is a constant `center G`.
---
[Wikipedia](https://en.wikipedia.org/wiki/Perfect_group#Gr.C3.BCn.27s_lemma)
[MathWorld](https://mathworld.wolfram.com/GruensLemma.html)
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t-group-theory
maintainer-merge
|
93/0 |
Mathlib/Algebra/Group/Subgroup/Ker.lean,Mathlib/GroupTheory/Commutator/Basic.lean,Mathlib/GroupTheory/IsPerfect.lean,Mathlib/GroupTheory/Nilpotent.lean,Mathlib/GroupTheory/Subgroup/Centralizer.lean |
5 |
19 |
['SnirBroshi', 'github-actions', 'tb65536'] |
tb65536 assignee:tb65536 |
14-8496 14 days ago |
14-8551 14 days ago |
19-39490 19 days |
| 40074 |
TJHeeringa author:TJHeeringa |
feat(Analysis/InnerProductSpace/TensorProduct): Add TensorProduct.mapL |
This PR defines `TensorProduct.mapL`, the continuous version of `TensorProduct.map`.
---
`Analysis/innerProductSpace/TensorProduct` has a TODO for a continuous version of `TensorProduct.map`. One place which contains a proof for this is at [stack](https://math.stackexchange.com/a/3934668). #38755 was lemma 1 of that. This PR is the remainder.
AI:
Used to generate `exists_repr`.
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|
t-analysis
new-contributor
large-import
maintainer-merge
|
254/9 |
Mathlib/Analysis/InnerProductSpace/TensorProduct.lean,Mathlib/Analysis/Normed/Operator/LinearIsometry.lean |
2 |
70 |
['JonBannon', 'TJHeeringa', 'github-actions', 'themathqueen'] |
themathqueen assignee:themathqueen |
13-31219 13 days ago |
13-31273 13 days ago |
14-76830 14 days |
| 40327 |
grunweg author:grunweg |
perf: lower priority for IsSimpleGroup.toNontrivial instances |
These instances have very weak keys ([Nontrivial, *]), hence are always applied. Let's try lowering their priority.
---
Benchmarking results are [slightly positive](https://github.com/leanprover-community/mathlib4/pull/40304#issuecomment-4640304473), but could also be noise.
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|
t-group-theory
maintainer-merge
|
4/0 |
Mathlib/GroupTheory/Subgroup/Simple.lean |
1 |
5 |
['github-actions', 'grunweg', 'tb65536'] |
tb65536 assignee:tb65536 |
11-63595 11 days ago |
15-46094 15 days ago |
15-45497 15 days |
| 40138 |
faenuccio author:faenuccio |
doc: fix the doc of two files about group actions |
|
documentation
t-group-theory
maintainer-merge
|
146/144 |
Mathlib/GroupTheory/GroupAction/Quotient.lean,Mathlib/GroupTheory/Schreier.lean |
2 |
31 |
['adomani', 'b-mehta', 'eric-wieser', 'faenuccio', 'github-actions', 'grunweg', 'jcommelin', 'tb65536'] |
tb65536 assignee:tb65536 |
10-55886 10 days ago |
13-47142 13 days ago |
15-32859 15 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.
---
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This comes from splitting up #25841 into smaller PRs.
[](https://gitpod.io/from-referrer/)
|
t-combinatorics
maintainer-merge
|
164/0 |
Mathlib.lean,Mathlib/Combinatorics/SimpleGraph/Extremal/Zarankiewicz.lean,Mathlib/Combinatorics/SimpleGraph/Maps.lean |
3 |
30 |
['SnirBroshi', 'YaelDillies', 'b-mehta', 'github-actions', 'mathlib-dependent-issues', 'mathlib-merge-conflicts', 'mitchell-horner'] |
nobody |
8-59711 8 days ago |
8-59763 8 days ago |
87-83948 87 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`.
---
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- [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.
[](https://gitpod.io/from-referrer/) |
t-combinatorics
maintainer-merge
|
329/0 |
Mathlib.lean,Mathlib/Combinatorics/SimpleGraph/Extremal/ErdosStoneSimonovits.lean |
2 |
19 |
['YaelDillies', 'b-mehta', 'github-actions', 'mathlib-dependent-issues', 'mathlib4-merge-conflict-bot', 'mitchell-horner', 'robin-carlier'] |
nobody |
8-58992 8 days ago |
8-59057 8 days ago |
109-72976 109 days |
| 39307 |
FordUniver author:FordUniver |
feat(Combinatorics/SimpleGraph/Copy): introduce `UnlabeledCopy` carrier subtype |
Adds `abbrev UnlabeledCopy A B := {B' : B.Subgraph // Nonempty (A ≃g B'.coe)}` and uses it to replace the previous inline filter-set body of `copyCount G H`. Drops the now unused legacy Finset-image bridge `copyCount_eq_card_image_copyToSubgraph`. Adds `uniqueUnlabeledCopyBot` instance so `copyCount_bot` is a one-liner via `Fintype.card_unique`.
Co-authored-by: Malte Jackisch <45597826+MaltyBlanket@users.noreply.github.com>
---
**Step 1/5 of the `Copy` / `InducedCopy` refactor-feat stack.**
This PR isolates the `UnlabeledCopy` type introduction and the count's type-form redefinition from the larger rename/convention work in the rest of the stack. Note that resolving the current clash in naming (`Copy` and `UnlabeledCopy` vs `labelledCopyCount` and `copyCount`) is part of #38745.
|
t-combinatorics
maintainer-merge
|
32/30 |
Mathlib/Combinatorics/SimpleGraph/Copy.lean |
1 |
9 |
['FordUniver', 'SnirBroshi', 'YaelDillies', 'github-actions', 'mathlib-bors', 'mathlib-merge-conflicts', 'mitchell-horner'] |
nobody |
7-47601 7 days ago |
9-4020 9 days ago |
38-55988 38 days |
| 40128 |
wwylele author:wwylele |
chore(LinearAlgebra/Matrix): avoid defeq abuse in cRank |
The previous definition of cRank uses Matrix as a function to the parameter of Set.range. This causes difficulties in downstream proofs when unfolding and applying lemmas. The new definition uses col to explicitly convert from Matrix to function.
---
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|
t-algebra
tech debt
maintainer-merge
label:t-algebra$ |
18/13 |
Mathlib/LinearAlgebra/Matrix/Defs.lean,Mathlib/LinearAlgebra/Matrix/Rank.lean |
2 |
22 |
['SnirBroshi', 'eric-wieser', 'github-actions', 'themathqueen', 'wwylele'] |
themathqueen assignee:themathqueen |
7-29961 7 days ago |
7-30065 7 days ago |
8-69599 8 days |
| 40530 |
j-loreaux author:j-loreaux |
feat: introduce `SelfAdjointDecompose` class |
---
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|
t-algebra
maintainer-merge
label:t-algebra$ |
70/27 |
Mathlib/Algebra/Order/Star/Basic.lean,Mathlib/Algebra/Order/Star/Real.lean,Mathlib/Analysis/CStarAlgebra/PositiveLinearMap.lean,Mathlib/Analysis/SpecialFunctions/ContinuousFunctionalCalculus/PosPart/Basic.lean,Mathlib/LinearAlgebra/Complex/Module.lean |
5 |
23 |
['eric-wieser', 'github-actions', 'j-loreaux', 'themathqueen'] |
nobody |
7-20484 7 days ago |
7-20552 7 days ago |
9-85431 9 days |
| 36376 |
jessealama author:jessealama |
feat(SimpleGraph): hamiltonian cycle from cyclic permutation |
This PR provides `IsHamiltonian.of_perm`, a bridge from `Equiv.Perm.IsCycle` to `SimpleGraph.IsHamiltonian`: if σ is a permutation that is a single cycle with full support on at least 3 elements, and each step `v → σ v` is an edge of `G`, then `G` is Hamiltonian.
### New definitions and lemmas
**`Mathlib/Data/List/Chain.lean`**:
- `IsChain.iterate`: `List.iterate f a n` is a chain under `r` whenever `r a (f a)` holds for all `a`
**`Mathlib/Data/List/Iterate.lean`**:
- `getLast_iterate`: the last element of `List.iterate f a n` is `f^[n - 1] a`
**`Mathlib/Combinatorics/SimpleGraph/Walk/Iterate.lean`** (new file):
- `Walk.iterate`: builds a walk of length `n` from `x` to `f^[n] x` for any function `f` with `G.Adj x (f x)` for all `x`, defined via `Walk.ofSupport`
- `Walk.length_iterate`, `Walk.support_iterate`, `Walk.edges_iterate`: basic API
**`Mathlib/GroupTheory/Perm/Cycle/Basic.lean`**:
- `IsCycleOn.injOn_pow_apply`: the map `n ↦ (f ^ n) a` is injective on `Finset.range #s`
**`Mathlib/GroupTheory/Perm/Cycle/Concrete.lean`**:
- `IsCycleOn.injOn_sym2_pow_apply`: the unordered-pair edge map `k ↦ s((f ^ k) a, (f ^ (k + 1)) a)` is injective on `[0, #s)` when `#s ≠ 2`
- `IsCycleOn.sym2_pow_apply_ne`: edge distinctness for cycle-on permutations — `s((f ^ k) a, (f ^ (k + 1)) a) ≠ s(a, f a)` when `k ≠ 0`, `k < #s`, and `#s ≠ 2`
- `Perm.toList_eq_range_map_pow`: expresses `toList` as a range map over powers
**`Mathlib/Combinatorics/SimpleGraph/Hamiltonian.lean`**:
- `cons_isHamiltonianCycle_iff`: a Hamiltonian path closed by an edge outside its support is a Hamiltonian cycle, and conversely
- `IsHamiltonian.of_perm`: the main theorem
---
- [x] depends on: #36307 |
t-combinatorics
maintainer-merge
awaiting-author
|
182/0 |
Mathlib.lean,Mathlib/Combinatorics/SimpleGraph/Hamiltonian.lean,Mathlib/Combinatorics/SimpleGraph/Hamiltonian/Perm.lean,Mathlib/Combinatorics/SimpleGraph/Walk/Iterate.lean,Mathlib/Data/List/Chain.lean,Mathlib/Data/List/Iterate.lean,Mathlib/GroupTheory/Perm/Cycle/Basic.lean,Mathlib/GroupTheory/Perm/Cycle/Concrete.lean |
8 |
81 |
['SnirBroshi', 'YaelDillies', 'github-actions', 'jessealama', 'mathlib-dependent-issues', 'mathlib-merge-conflicts', 'vlad902'] |
b-mehta assignee:b-mehta |
7-9868 7 days ago |
7-49529 7 days ago |
70-62332 70 days |
| 40628 |
FernandoChu author:FernandoChu |
feat(CategoryTheory): pseudofunctors preserve adjunctions |
|
t-category-theory
LLM-generated
large-import
maintainer-merge
|
66/7 |
Mathlib/CategoryTheory/Bicategory/Adjunction/Basic.lean,Mathlib/CategoryTheory/Bicategory/Functor/Prelax.lean |
2 |
6 |
['FernandoChu', 'dagurtomas', 'github-actions'] |
dagurtomas assignee:dagurtomas |
6-39350 6 days ago |
6-41075 6 days ago |
7-29520 7 days |
| 40669 |
mathlib-splicebot author:mathlib-splicebot |
chore(Algebra/Ring/Periodic): automated extraction from #38483 |
---
This PR was automatically created from PR #38483 by @jessealama via a [review comment](https://github.com/leanprover-community/mathlib4/pull/38483#discussion_r3420828318) by @themathqueen. |
maintainer-merge
t-algebra
label:t-algebra$ |
7/0 |
Mathlib/Algebra/Ring/Periodic.lean |
1 |
3 |
['github-actions', 'themathqueen'] |
nobody |
6-28400 6 days ago |
6-28474 6 days ago |
6-27877 6 days |
| 37190 |
cjrl author:cjrl |
feat(Combinatorics): set-valued pigeonhole principle |
This PR contributes two theorems to combinatorics:
- `exists_lt_card_cover_of_card_biUnion_lt_card` is a set-valued version of the pigeonhole principle.
- `sum_card_eq_sum_card_cover_biUnion` is a set theoretic corollary of a double counting result proved for bipartite graphs (`Finset.sum_card_bipartiteAbove_eq_sum_card_bipartiteBelow`). This was needed to prove the above pigeonhole principle.
The motivation for these results is our Latin Square PR #36698. These results were proved in less general terms in that PR, but are independent of Latin Square considerations and so we have generalized and moved them into more relevant files.
---
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|
new-contributor
t-combinatorics
maintainer-merge
|
39/0 |
Mathlib/Combinatorics/Enumerative/DoubleCounting.lean,Mathlib/Combinatorics/Pigeonhole.lean |
2 |
27 |
['IvanRenison', 'YaelDillies', 'cjrl', 'ghseeli', 'github-actions', 'j-loreaux', 'vlad902'] |
nobody |
6-25244 6 days ago |
6-25244 6 days ago |
85-83661 85 days |
| 38531 |
SnirBroshi author:SnirBroshi |
feat(Combinatorics/SimpleGraph/Paths): `Walk.map` preserves more properties |
Adds some missing theorems about how `Walk.map` behaves with `IsTrail`/`IsPath`/`IsCircuit`/`IsCycle`.
Summary of what we have now, with the 8 new theorems and 8 renames marked:
```
IsTrail.of_map : (p.map f).IsTrail → p.IsTrail -- new
isTrail_map_iff_of_injective : f.Injective → (p.map f).IsTrail ↔ p.IsTrail -- renamed from map_isTrail_iff_of_injective
IsTrail.map : f.Injective → p.IsTrail → (p.map f).IsTrail -- renamed from map_isTrail_of_injective
IsPath.of_map : (p.map f).IsPath → p.IsPath
isPath_map_iff_of_injective : f.Injective → (p.map f).IsPath ↔ p.IsPath -- renamed from map_isPath_iff_of_injective
IsPath.map : f.Injective f → p.IsPath → (p.map f).IsPath -- renamed from map_isPath_of_injective
IsCircuit.of_map : (p.map f).IsCircuit → p.IsCircuit -- new
isCircuit_map_iff_of_injective : f.Injective → (p.map f).IsCircuit ↔ p.IsCircuit -- new
IsCircuit.map : f.Injective → p.IsCircuit → (p.map f).IsCircuit -- new
IsCycle.of_map : (p.map f).IsCycle → p.IsCycle -- new
isCycle_map_iff_of_injective : f.Injective → (p.map f).IsCycle ↔ p.IsCycle -- renamed from map_isCycle_iff_of_injective
IsCycle.map : f.Injective → p.IsCycle → (p.map f).IsCycle
isTrail_mapLe : G ≤ G' → (p.mapLe h).IsTrail ↔ p.IsTrail -- renamed from mapLe_isTrail
IsTrail.of_mapLe : G ≤ G' → (p.mapLe h).IsTrail → p.IsTrail
IsTrail.mapLe : G ≤ G' → p.IsTrail → (p.mapLe h).IsTrail
isPath_mapLe : G ≤ G' → (p.mapLe h).IsPath ↔ p.IsPath -- renamed from mapLe_isPath
IsPath.of_mapLe : G ≤ G' → (p.mapLe h).IsPath → p.IsPath
IsPath.mapLe : G ≤ G' → p.IsPath → (p.mapLe h).IsPath
isCircuit_mapLe : G ≤ G' → (p.mapLe h).IsCircuit ↔ p.IsCircuit -- new
IsCircuit.of_mapLe : G ≤ G' → (p.mapLe h).IsCircuit → p.IsCircuit -- new
IsCircuit.mapLe : G ≤ G' → p.IsCircuit → (p.mapLe h).IsCircuit -- new
isCycle_mapLe : G ≤ G' → (p.mapLe h).IsCycle ↔ p.IsCycle -- renamed from mapLe_isCycle
IsCycle.of_mapLe : G ≤ G' → (p.mapLe h).IsCycle → p.IsCycle
IsCycle.mapLe : G ≤ G' → p.IsCycle → (p.mapLe h).IsCycle
```
---
Also golfs `map_isPath_of_injective`/`IsPath.of_map`/`map_isTrail_iff_of_injective`, they don't need induction.
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t-combinatorics
maintainer-merge
|
76/44 |
Mathlib/Combinatorics/SimpleGraph/Acyclic.lean,Mathlib/Combinatorics/SimpleGraph/Paths.lean |
2 |
3 |
['YaelDillies', 'github-actions'] |
nobody |
6-23565 6 days ago |
6-26480 6 days ago |
57-78138 57 days |
| 38528 |
SnirBroshi author:SnirBroshi |
feat(Combinatorics/SimpleGraph/Paths): some cycle lemmas are true for circuits |
Add `IsCircuit.{not_of_nil,ne_bot,three_le_length}` by using their corresponding `IsCycle` proofs.
Also golfs a bit.
---
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|
t-combinatorics
maintainer-merge
|
15/13 |
Mathlib/Combinatorics/SimpleGraph/Girth.lean,Mathlib/Combinatorics/SimpleGraph/Paths.lean |
2 |
4 |
['SnirBroshi', 'YaelDillies', 'github-actions'] |
nobody |
6-23517 6 days ago |
6-23757 6 days ago |
58-11638 58 days |
| 40254 |
joelriou author:joelriou |
feat(AlgebraicTopology): a nonsingular simplicial set is the colimit of standard simplices indexed by nondegenerate simplices |
---
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|
t-algebraic-topology
maintainer-merge
|
212/2 |
Mathlib.lean,Mathlib/AlgebraicTopology/SimplicialSet/NonDegenerateSimplicesColimit.lean,Mathlib/AlgebraicTopology/SimplicialSet/Nonsingular.lean,Mathlib/AlgebraicTopology/SimplicialSet/NonsingularColimit.lean,Mathlib/AlgebraicTopology/SimplicialSet/StdSimplex.lean |
5 |
3 |
['dagurtomas', 'github-actions'] |
nobody |
6-16953 6 days ago |
6-17046 6 days ago |
17-29543 17 days |
| 40515 |
j-loreaux author:j-loreaux |
feat: `Monoid` and `Group` instances for `OrderHom` and `OrderIso` |
These will be used in an upcoming PR to turn `fun x ↦ (x * · * star x)` into a term of type `R →* (R →o R)` when `R` is a `StarOrderedRing`, and likewise also `Rˣ →* (R ≃o R)`.
---
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|
t-algebra
t-order
large-import
maintainer-merge
label:t-algebra$ |
45/0 |
Mathlib/Algebra/Order/Group/End.lean,Mathlib/Data/FunLike/IsApply.lean |
2 |
23 |
['eric-wieser', 'github-actions', 'j-loreaux', 'themathqueen'] |
nobody |
6-15754 6 days ago |
8-59176 8 days ago |
10-31578 10 days |
| 40668 |
JovanGerb author:JovanGerb |
chore(Tactic/Linarith/Parsing): remove local abbrev for `TreeMap` |
We can now write `TreeMap`, and `Ord.compare` is filled in automatically.
---
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|
t-meta
maintainer-merge
|
7/10 |
Mathlib/Tactic/Linarith/Parsing.lean |
1 |
3 |
['github-actions', 'grunweg'] |
nobody |
6-15477 6 days ago |
6-28060 6 days ago |
6-27463 6 days |
| 40491 |
zw810-ctrl author:zw810-ctrl |
feat(Algebra): range_prodMap for MonoidHom, RingHom, AlgHom |
---
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|
t-algebra
new-contributor
maintainer-merge
label:t-algebra$ |
34/1 |
Mathlib/Algebra/Algebra/Subalgebra/Prod.lean,Mathlib/Algebra/Group/Subgroup/Basic.lean,Mathlib/Algebra/Group/Submonoid/Operations.lean,Mathlib/Algebra/Ring/Subring/Basic.lean,Mathlib/Algebra/Ring/Subsemiring/Basic.lean,Mathlib/RingTheory/Ideal/Prod.lean |
6 |
19 |
['eric-wieser', 'github-actions', 'themathqueen', 'zw810-ctrl'] |
nobody |
6-14908 6 days ago |
6-14983 6 days ago |
10-60140 10 days |
| 38529 |
SnirBroshi author:SnirBroshi |
feat(Combinatorics/SimpleGraph/Girth): `egirth ⊤ = 3` when there are at least 3 vertices |
Since `Nontrivial` is not enough, we use the condition `3 ≤ ENat.card α`.
---
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t-combinatorics
maintainer-merge
|
17/0 |
Mathlib/Combinatorics/SimpleGraph/Girth.lean |
1 |
7 |
['SnirBroshi', 'YaelDillies', 'github-actions', 'mathlib-merge-conflicts', 'vlad902'] |
nobody |
5-49252 5 days ago |
7-26280 7 days ago |
56-19504 56 days |
| 39793 |
grunweg author:grunweg |
feat: make the `dupNamespace` linter catch any duplicate namespace(s) |
Before this PR, the `dupNamespace` linter would only flag a namespace as duplicate if it was repeated in two consecutive positions: `Foo.Foo.bar` would be linted, but neither `Foo.Bar.Foo.Bar.baz` nor `Foo.Bar.Foo.Baz.baz` would be (even though they are very likely unintentional).
Strengthen the linter check, to error if any namespace component is duplicated.
This has few false positives (which we manually annotate), but catches many pre-existing
cases where the duplication was clearly unintentional and undesirable.
Most of the mathlib adaptation was done in #39794.
---
- [x] depends on: #39794
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|
t-linter
maintainer-merge
|
187/21 |
Mathlib/Algebra/Polynomial/Bivariate.lean,Mathlib/Analysis/InnerProductSpace/JointEigenspace.lean,Mathlib/CategoryTheory/Bicategory/Adjunction/Adj.lean,Mathlib/CategoryTheory/Groupoid/VertexGroup.lean,Mathlib/CategoryTheory/Subobject/Classifier/Defs.lean,Mathlib/Data/Set/FiniteExhaustion.lean,Mathlib/Geometry/Manifold/VectorBundle/MDifferentiable.lean,Mathlib/GroupTheory/Submonoid/Inverses.lean,Mathlib/LinearAlgebra/FreeModule/Basic.lean,Mathlib/Logic/Equiv/Set.lean,Mathlib/NumberTheory/NumberField/Completion/FinitePlace.lean,Mathlib/NumberTheory/NumberField/InfinitePlace/Basic.lean,Mathlib/Order/Filter/Germ/Basic.lean,Mathlib/RingTheory/Etale/Basic.lean,Mathlib/RingTheory/Finiteness/Basic.lean,Mathlib/RingTheory/TensorProduct/Maps.lean,Mathlib/Tactic/Linter/Lint.lean,MathlibTest/Lint.lean |
18 |
51 |
['SnirBroshi', 'github-actions', 'grunweg', 'joneugster', 'kim-em', 'leanprover-radar', 'mathlib-dependent-issues', 'thorimur'] |
joneugster and thorimur assignee:joneugster assignee:thorimur |
5-20032 5 days ago |
5-20351 5 days ago |
15-8334 15 days |
| 39898 |
yuanyi-350 author:yuanyi-350 |
refactor(Analysis): golf `Mathlib/Analysis/Normed/Unbundled/AlgebraNorm` |
- refactors `Normed/Unbundled/AlgebraNorm` by using structure inheritance in `MulRingNorm.toRingNorm`
---
Extracted from #37968
[](https://gitpod.io/from-referrer/) |
codex
t-analysis
LLM-generated
maintainer-merge
|
2/5 |
Mathlib/Analysis/Normed/Unbundled/AlgebraNorm.lean |
1 |
11 |
['ADedecker', 'JonBannon', 'faenuccio', 'github-actions', 'j-loreaux', 'themathqueen', 'yuanyi-350'] |
nobody |
5-16966 5 days ago |
11-50278 11 days ago |
26-11443 26 days |
| 40722 |
grunweg author:grunweg |
fix: correct deprecation for orthogonalProjection_mem_subspace_orthog… |
…onalComplement_eq_zero
#38970 tried to create one, but made a slip (and created a deprecated alias for a declaration that never existed). Correct this oversight. Noticed during leanprover-community/sphere-eversion#143.
---
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|
maintainer-merge
t-analysis
|
2/1 |
Mathlib/Analysis/InnerProductSpace/Projection/Basic.lean |
1 |
2 |
['github-actions', 'themathqueen'] |
nobody |
5-14745 5 days ago |
5-14813 5 days ago |
5-14216 5 days |
| 37598 |
IvanRenison author:IvanRenison |
feat(Combinatorics/SimpleGraph/Coloring): add lemmas about coloring and maps |
---
Idea from this Zulip thread: [graph theory>Second Order Monadic Logic for Graph](https://leanprover.zulipchat.com/#narrow/channel/252551-graph-theory/topic/Second.20Order.20Monadic.20Logic.20for.20Graph/with/583013775)
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|
t-combinatorics
maintainer-merge
merge-conflict
|
32/11 |
Mathlib/Combinatorics/SimpleGraph/Coloring/Vertex.lean,Mathlib/Combinatorics/SimpleGraph/Maps.lean |
2 |
35 |
['IvanRenison', 'SnirBroshi', 'YaelDillies', 'b-mehta', 'github-actions', 'mathlib-bors', 'mathlib-merge-conflicts', 'vlad902'] |
nobody |
4-51733 4 days ago |
9-50864 9 days ago |
63-65371 63 days |
| 35255 |
vlad902 author:vlad902 |
feat(SimpleGraph): `cycleGraph` is contained in every graph with a cycle |
---
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|
t-combinatorics
maintainer-merge
|
34/0 |
Mathlib/Combinatorics/SimpleGraph/Circulant.lean |
1 |
4 |
['YaelDillies', 'github-actions', 'mathlib-dependent-issues', 'mathlib-merge-conflicts'] |
nobody |
4-49906 4 days ago |
7-12669 7 days ago |
54-85182 54 days |
| 40634 |
grunweg author:grunweg |
feat: PiLp.equivOfUnique |
Add the isomorphism between `PiLp` over any `Unique` index type and the corresponding individual type.
Generalise `PiLp.linearEquiv` to topological vector spaces, then this is straightforward.
This will be used in #29077, to yield an equivalence `EuclideanSpace 𝕜 (Fin 1) ≃L[𝕜] 𝕜`.
---
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|
t-analysis
maintainer-merge
|
14/2 |
Mathlib/Analysis/Normed/Lp/PiLp.lean |
1 |
45 |
['eric-wieser', 'github-actions', 'grunweg', 'themathqueen', 'wwylele'] |
nobody |
4-41267 4 days ago |
4-85124 4 days ago |
6-17757 6 days |
| 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.
---
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|
t-meta
awaiting-author
maintainer-merge
|
236/0 |
Mathlib.lean,Mathlib/Tactic.lean,Mathlib/Tactic/DuplicateDecls.lean,MathlibTest/Tactic/DuplicateDecls.lean,MathlibTest/Tactic/DuplicateDeclsAux.lean |
5 |
18 |
['JovanGerb', 'bryangingechen', 'github-actions', 'thorimur'] |
dwrensha and thorimur assignee:dwrensha assignee:thorimur |
4-12741 4 days ago |
12-63741 12 days ago |
16-52955 16 days |
| 40787 |
Mal-Pat author:Mal-Pat |
doc(Combinatorics/SimpleGraph/Girth): fix incorrect TODO statement |
The TODO statement `G.egirth ≤ 2 * G.ediam + 1` on its own is incorrect - a finite acyclic graph has `G.egirth = ∞` with finite `G.ediam`. The condition that `G` must not be acyclic has been added to the statement to make it correct.
Also, the condition that the diameter must be non-zero is not required to prove `¬ G.IsAcyclic → G.egirth ≤ 2 * G.ediam + 1`.
---
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|
t-combinatorics
new-contributor
maintainer-merge
|
2/2 |
Mathlib/Combinatorics/SimpleGraph/Girth.lean |
1 |
3 |
['YaelDillies', 'github-actions'] |
nobody |
3-50617 3 days ago |
3-81630 3 days ago |
3-81033 3 days |
| 39703 |
YaelDillies author:YaelDillies |
chore: create a `Basic` top folder |
Move a select few folders from `Logic` to a new `Basic` folder.
The goal is to finally move the material misplaced in the `Data` and `Logic` folder and to clarify the various expectations of each folder. Ultimately:
* the `Basic` folder will be about basic predicates on types and basic mathematical types not fitting in any other folder;
* the `Data` folder will be about data structures, instead of the current mix of data structures and basic mathematical types not fitting in any other folder;
* the `Logic` folder will be about advanced logic results not fitting in either `ModelTheory` or `SetTheory`, instead of the current mix of basic predicates on types and advanced logic results.
Many more files (~1000) could be moved, so I will do it in several PRs. Not all files should move to `Basic`. Some files should go to `Algebra.Order` instead (eg `Data.Nat.Lattice`) and some should be straight out deprecated (eg `Data.Analysis`).
[Zulip discussion](https://leanprover.zulipchat.com/#narrow/channel/345428-mathlib-reviewers/topic/Basic.20folder/with/597151406)
---
This PR stems from discussions at the MI retreat 2026.
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file-removed
t-data
maintainer-merge
|
148/95 |
Counterexamples/Girard.lean,Mathlib.lean,Mathlib/Algebra/CharZero/Defs.lean,Mathlib/Algebra/Group/Irreducible/Defs.lean,Mathlib/Algebra/Group/Nat/Units.lean,Mathlib/Algebra/Group/Pi/Basic.lean,Mathlib/Algebra/Group/Units/Basic.lean,Mathlib/Algebra/Group/WithOne/Defs.lean,Mathlib/Algebra/GroupWithZero/Basic.lean,Mathlib/Algebra/GroupWithZero/Defs.lean,Mathlib/Algebra/Module/Presentation/Free.lean,Mathlib/Algebra/Module/Projective.lean,Mathlib/Algebra/NeZero.lean,Mathlib/Basic/Denumerable.lean,Mathlib/Basic/ExistsUnique.lean,Mathlib/Basic/IsEmpty.lean,Mathlib/Basic/IsEmpty/Basic.lean,Mathlib/Basic/IsEmpty/Defs.lean,Mathlib/Basic/Logic/Basic.lean,Mathlib/Basic/Logic/Lemmas.lean,Mathlib/Basic/Nonempty.lean,Mathlib/Basic/Nontrivial/Basic.lean,Mathlib/Basic/Nontrivial/Defs.lean,Mathlib/Basic/README.md,Mathlib/Basic/Unique.lean,Mathlib/Basic/UnivLE.lean,Mathlib/CategoryTheory/EssentiallySmall.lean,Mathlib/CategoryTheory/Limits/Types/Colimits.lean,Mathlib/CategoryTheory/Limits/Types/Limits.lean,Mathlib/CategoryTheory/UnivLE.lean,Mathlib/Combinatorics/Quiver/Path.lean,Mathlib/Computability/Primrec/Basic.lean,Mathlib/Data/Bool/Basic.lean,Mathlib/Data/FunLike/Basic.lean,Mathlib/Data/List/Basic.lean,Mathlib/Data/List/GetD.lean,Mathlib/Data/Nat/Basic.lean,Mathlib/Data/Nat/MaxPowDiv.lean,Mathlib/Data/Option/Basic.lean,Mathlib/Data/Quot.lean,Mathlib/Data/README.md,Mathlib/Data/Rat/Denumerable.lean,Mathlib/Data/TwoPointing.lean,Mathlib/Lean/Meta/CongrTheorems.lean,Mathlib/LinearAlgebra/Matrix/Defs.lean,Mathlib/Logic/Equiv/Defs.lean,Mathlib/Logic/Equiv/List.lean,Mathlib/Logic/Function/Basic.lean,Mathlib/Logic/README.md,Mathlib/Order/OrderIsoNat.lean,Mathlib/Order/RelClasses.lean,Mathlib/Order/WithBot.lean,Mathlib/RingTheory/Coprime/Basic.lean,Mathlib/SetTheory/Cardinal/Basic.lean,Mathlib/SetTheory/Cardinal/UnivLE.lean,Mathlib/SetTheory/ZFC/Rank.lean,Mathlib/Tactic/CancelDenoms/Core.lean,Mathlib/Tactic/CongrExclamation.lean,Mathlib/Tactic/ITauto.lean,Mathlib/Tactic/Linter/DirectoryDependency.lean,Mathlib/Tactic/Nontriviality/Core.lean,Mathlib/Tactic/Push.lean,Mathlib/Tactic/Subsingleton.lean,Mathlib/Tactic/Tauto.lean,Mathlib/Testing/Plausible/Testable.lean,Mathlib/Topology/Order/UpperLowerSetTopology.lean,MathlibTest/Linter/PrivateModule/ImportOnly.lean,scripts/autolabel.lean,scripts/noshake.json |
69 |
29 |
['SnirBroshi', 'YaelDillies', 'github-actions', 'grunweg', 'joneugster', 'mathlib-merge-conflicts', 'themathqueen'] |
joneugster assignee:joneugster |
3-46757 3 days ago |
4-43961 4 days ago |
25-28147 25 days |
| 40088 |
jeangud author:jeangud |
fix(Tactic/Linter/DocString): avoid false positive in syntax quotation patterns |
Fix a false-positive in the `linter.style.docString.empty` linter with pattern matching:
```lean
/-- Checks if a command has the `AMS` attribute. -/
def toAMS (stx : TSyntax ``Command.declModifiers) :
CommandElabM (Array <| TSyntaxArray `num) := do
match stx with
| `(declModifiers| $(_)? @[$[$atts],*] $(_)? $(_)? $(_)? $(_)?) =>
atts.filterMapM fun att ↦ do
match att with
| `(attrInstance | AMS $nums*) => return some nums
| _ => return none
| _ => return #[]
```
This can be addressed by ensuring the syntax kind of the doc string is ``` ``Parser.Command.docComment``` as syntax quotation uses an antiquotation syntax instead.
- :robot: Implemented and test with **Gemini 3.1 Pro**. This change is pretty targeted so I did not have much to redo except reviewing.
---
<details>
<summary>Old, noisy description</summary>
# Description
Syntax quotations are a key meta-programming feature for Lean 4, but the `linter.style.docString.empty` linter currently does not handle them correctly.
This PR:
- Closes #40087
- Adds a regression test for syntax quotation patterns
- :robot: Implemented and test with **Gemini 3.1 Pro**. This change is pretty targeted so I did not have much to redo except reviewing.
**Example false positive:**
In the [formal-conjectures](https://github.com/google-deepmind/formal-conjectures) repository, the `AMSLinter`:
```lean
/-- Checks if a command has the `AMS` attribute. -/
def toAMS (stx : TSyntax ``Command.declModifiers) :
CommandElabM (Array <| TSyntaxArray `num) := do
match stx with
| `(declModifiers| $(_)? @[$[$atts],*] $(_)? $(_)? $(_)? $(_)?) =>
atts.filterMapM fun att ↦ do
match att with
| `(attrInstance | AMS $nums*) => return some nums
| _ => return none
| _ => return #[]
```
**Proposed Fix:** We can fix this by explicitly checking the kind of the docstring node before processing it. Pattern nodes from syntax quotations use antiquotations for the docstring slot (like `$(_)?`), which have a different syntax kind than actual doc comments. Filtering by `docStx.getKind == ``Parser.Command.docComment` successfully filters out the false positives while keeping the linter working for actual source code:
```lean
if docStx.isMissing then continue -- this is probably superfluous, thanks to `some pos` above.
if docStx.getKind != ``Parser.Command.docComment then continue -- ignore antiquotations from syntax patterns like `$(_)?`
```
# Testing
:white_check_mark: Builds successfully
```shell
$ lake build Mathlib.Tactic.Linter.DocString
Build completed successfully (4 jobs).
```
:white_check_mark: Tests pass
```shell
$ lake build MathlibTest.Linter.DocString
Build completed successfully (6 jobs).
```
**Before :x:**
```shell
$ lake build ./FormalConjectures/Util/Linters/AMSLinter.lean
⚠ [68/68] Built FormalConjectures.Util.Linters.AMSLinter
warning: FormalConjectures/Util/Linters/AMSLinter.lean:48:21: warning: this doc-string is empty
Note: This linter can be disabled with `set_option linter.style.docString.empty false`
warning: FormalConjectures/Util/Linters/AMSLinter.lean:69:27: warning: this doc-string is empty
Note: This linter can be disabled with `set_option linter.style.docString.empty false`
Build completed successfully (68 jobs).
```
**After :white_check_mark:**
```shell
$ lake build ./FormalConjectures/Util/Linters/AMSLinter.lean
Build completed successfully (25 jobs).
```
</details> |
t-linter
new-contributor
LLM-generated
maintainer-merge
|
19/0 |
Mathlib/Tactic/Linter/DocString.lean,MathlibTest/Linter/DocString.lean |
2 |
8 |
['github-actions', 'jeangud', 'joneugster'] |
nobody |
3-41799 3 days ago |
19-10006 19 days ago |
20-63452 20 days |
| 31513 |
amellendijk author:amellendijk |
feat(Tactic): `polynomial(_nf)` tactics |
Implement tactic for proving equality of polynomials.
This tactic is part of a larger suite (see https://github.com/leanprover-community/mathlib4/pull/30374).
Also generalize the preprocessing step for `algebra` so that it always replaces `algebraMap R A r` with `r • 1` instead of only when `R` is `Nat` or `Int`. This was an oversight in `algebra` that broke `polynomial`.
- [x] depends on: #31508
---
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|
t-meta
maintainer-merge
|
468/49 |
Mathlib.lean,Mathlib/Algebra/MvPolynomial/Basic.lean,Mathlib/RingTheory/Polynomial/Basic.lean,Mathlib/Tactic.lean,Mathlib/Tactic/Algebra/AlgebraNF.lean,Mathlib/Tactic/Algebra/Basic.lean,Mathlib/Tactic/Polynomial/Basic.lean,Mathlib/Tactic/Polynomial/Core.lean,MathlibTest/Tactic/Polynomial.lean |
9 |
41 |
['amellendijk', 'github-actions', 'joneugster', 'mathlib-dependent-issues', 'mathlib-merge-conflicts', 'mathlib4-merge-conflict-bot'] |
Vierkantor and joneugster assignee:Vierkantor assignee:joneugster |
3-39804 3 days ago |
13-33215 13 days ago |
29-27433 29 days |
| 40774 |
riccardobrasca author:riccardobrasca |
chore: remove useless lines |
---
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|
t-number-theory
maintainer-merge
|
0/2 |
Mathlib/NumberTheory/RamificationInertia/Galois.lean |
1 |
5 |
['github-actions', 'leanprover-radar', 'riccardobrasca', 'tb65536'] |
nobody |
3-38245 3 days ago |
3-45321 3 days ago |
3-44724 3 days |
| 37963 |
martinwintermath author:martinwintermath |
feat(LinearAlgebra/SesquilinearForm): moving orthogonality to own file |
Move `Submodule.orthogonalBilin` and all lemmas that use it from SesquilinearForm/Basic.lean to its own file SesquilinearForm/Orthogonal.lean.
We also add `gcongr` to `orthogonalBilin_le`.
---
This PR was split off from #40746, which adds the actual new features.
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[](https://gitpod.io/from-referrer/)
|
t-algebra
maintainer-merge
label:t-algebra$ |
144/110 |
Mathlib.lean,Mathlib/Analysis/InnerProductSpace/Orthogonal.lean,Mathlib/LinearAlgebra/BilinearForm/Orthogonal.lean,Mathlib/LinearAlgebra/QuadraticForm/Basic.lean,Mathlib/LinearAlgebra/SesquilinearForm/Basic.lean,Mathlib/LinearAlgebra/SesquilinearForm/Orthogonal.lean |
6 |
12 |
['github-actions', 'jcommelin', 'martinwintermath', 'mathlib-dependent-issues', 'mathlib-merge-conflicts', 'themathqueen'] |
nobody |
3-8547 3 days ago |
3-8601 3 days ago |
4-66351 4 days |
| 38589 |
vlad902 author:vlad902 |
feat(SimpleGraph): add universal vertex predicate |
Add the predicate `G.IsUniversal v` to indicate that `v` is a universal vertex, i.e. connected to all other vertices in `G`. This matches the recently added `G.IsIsolated v` predicate for isolated vertices.
Co-authored-by: Justin Lai <justsoft.jsoft@gmail.com>
---
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|
t-combinatorics
maintainer-merge
|
111/18 |
Mathlib/Combinatorics/SimpleGraph/Basic.lean,Mathlib/Combinatorics/SimpleGraph/Connectivity/Connected.lean,Mathlib/Combinatorics/SimpleGraph/Finite.lean,Mathlib/Combinatorics/SimpleGraph/Star.lean,Mathlib/Combinatorics/SimpleGraph/Tutte.lean,Mathlib/Combinatorics/SimpleGraph/UniversalVerts.lean |
6 |
37 |
['8e7', 'Rida-Hamadani', 'SnirBroshi', 'YaelDillies', 'github-actions', 'mathlib-merge-conflicts', 'vlad902'] |
nobody |
3-6356 3 days ago |
3-7457 3 days ago |
53-10474 53 days |
| 38830 |
Jun2M author:Jun2M |
feat(Data/List): Nodup and head & getLast lemmas |
Given a Nodup list:
* If a prefix contains the last element, they are equal
* If a suffix contains the first element, they are equal
* If an infix contains the first element, it is a prefix
* If an infix contains the last element, it is a suffix
* If the first and the last element are the same, it is a singleton
* `countP` is cardinality of the filter of `toFinset`.
---
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|
t-data
maintainer-merge
|
32/0 |
Mathlib/Data/Finset/Basic.lean,Mathlib/Data/Finset/Card.lean,Mathlib/Data/List/Nodup.lean |
3 |
16 |
['Jun2M', 'SnirBroshi', 'b-mehta', 'github-actions', 'joneugster', 'mathlib-merge-conflicts'] |
joneugster assignee:joneugster |
2-81119 2 days ago |
3-14197 3 days ago |
38-41709 38 days |
| 35295 |
Rida-Hamadani author:Rida-Hamadani |
feat(SimpleGraph): `dropLast` of a cycle is a path |
---
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[](https://gitpod.io/from-referrer/)
|
t-combinatorics
maintainer-merge
|
3/0 |
Mathlib/Combinatorics/SimpleGraph/Paths.lean |
1 |
21 |
['Rida-Hamadani', 'SnirBroshi', 'YaelDillies', 'github-actions', 'mathlib-merge-conflicts', 'vlad902'] |
nobody |
2-80947 2 days ago |
2-81002 2 days ago |
40-78522 40 days |
| 39693 |
yuanyi-350 author:yuanyi-350 |
feat(Combinatorics/Enumerative/Bell): sum over partition shapes |
Kill TODO in `Mathlib/Combinatorics/Enumerative/Bell.lean` which proves `Nat.bell` as a sum of `Multiset.bell` over partition shapes
---
Migrated from #37690
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|
t-combinatorics
maintainer-merge
|
121/35 |
Mathlib/Combinatorics/Enumerative/Bell.lean |
1 |
8 |
['YaelDillies', 'eric-wieser', 'github-actions'] |
nobody |
2-71376 2 days ago |
2-71432 2 days ago |
31-31122 31 days |
| 40801 |
Mal-Pat author:Mal-Pat |
feat(Combinatorics/SimpleGraph/Paths): `p.IsPath → p.bypass = p` |
A useful lemma - if `p` is a path, then `p.bypass = p`.
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t-combinatorics
new-contributor
maintainer-merge
|
4/0 |
Mathlib/Combinatorics/SimpleGraph/Paths.lean |
1 |
10 |
['Mal-Pat', 'SnirBroshi', 'YaelDillies', 'github-actions', 'mathlib-bors'] |
nobody |
2-50844 2 days ago |
2-50899 2 days ago |
2-50302 2 days |
| 40796 |
luigi-massacci author:luigi-massacci |
feat(Analysis/Distribution/Support): version for D' of existing lemmas for S' |
This is an almost direct copy-paste of the existing lemmas for tempered distributions to generic distributions.
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t-analysis
easy
maintainer-merge
|
86/3 |
Mathlib/Analysis/Distribution/Distribution.lean,Mathlib/Analysis/Distribution/Support.lean |
2 |
7 |
['github-actions', 'luigi-massacci', 'mcdoll'] |
nobody |
2-17727 2 days ago |
2-17777 2 days ago |
3-38630 3 days |
| 36018 |
wwylele author:wwylele |
feat(LinearAlgebra/AffineSpace): parallel cross-section of a simplex |
This shows that the intersection of `AffineSubspace.shift` of the base of a simplex and the interior of the simplex is a smaller simplex. This is preparing to calculate the volume of a simplex by integrating this cross-section. Part of #37910.
---
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|
t-algebra
large-import
maintainer-merge
label:t-algebra$ |
133/1 |
Mathlib/LinearAlgebra/AffineSpace/AffineSubspace/Shift.lean,Mathlib/LinearAlgebra/AffineSpace/Simplex/Basic.lean |
2 |
17 |
['alreadydone', 'copilot-pull-request-reviewer', 'github-actions', 'mathlib-bors', 'mathlib-dependent-issues', 'wwylele'] |
alreadydone assignee:alreadydone |
1-64299 1 day ago |
1-64351 1 day ago |
63-54875 63 days |
| 40228 |
thorimur author:thorimur |
chore: clean up `backward.privateInPublic` around `d₂₃` |
Moves a single-use private declaration into a let declaration.
This reduces instructions in that file by ~29% (but this gets swallowed in the overall noise).
Note: currently `LieModule.Cohomology.d₂₃_aux._proof_17` is the biggest proof in mathlib (counted with sharing) :) This PR changes it to `CategoryTheory.Functor.IsDenseSubsite.isIso_ranCounit_app_of_isDenseSubsite`.
---
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t-algebra
tech debt
maintainer-merge
label:t-algebra$ |
11/17 |
Mathlib/Algebra/Lie/Cochain.lean |
1 |
26 |
['JovanGerb', 'b-mehta', 'github-actions', 'grunweg', 'leanprover-radar', 'mathlib-merge-conflicts', 'thorimur'] |
jjdishere assignee:jjdishere |
1-41222 1 day ago |
2-82658 2 days ago |
17-33921 17 days |
| 40547 |
Marygold-Dusk author:Marygold-Dusk |
feat: submersions are `C^n` |
The conventional textbook definition demands that a submersion be smooth.
When asking for the submersion to have local slice charts (as we do), this implies smoothness automatically.
Co-authored-by: Michael Rothgang <rothgang@math.uni-bonn.de>. |
t-differential-geometry
new-contributor
maintainer-merge
|
57/7 |
Mathlib/Geometry/Manifold/Submersion.lean |
1 |
40 |
['Marygold-Dusk', 'github-actions', 'grunweg', 'sgouezel'] |
grunweg assignee:grunweg |
1-16166 1 day ago |
1-16226 1 day ago |
2-58636 2 days |
| 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 |
| 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.
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|
t-analysis
awaiting-author
maintainer-merge
|
470/12 |
Mathlib/Analysis/Calculus/ParametricIntegral.lean,Mathlib/Analysis/Calculus/ParametricIntervalIntegral.lean,Mathlib/MeasureTheory/Integral/DominatedConvergence.lean,Mathlib/Topology/NhdsWithin.lean,Mathlib/Topology/Separation/Regular.lean |
5 |
36 |
['fpvandoorn', 'github-actions', 'j-loreaux', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot', 'peabrainiac', 'sgouezel'] |
j-loreaux assignee:j-loreaux |
131-35530 4 months ago |
131-35530 131 days ago |
22-14837 22 days |
| 37057 |
erdOne author:erdOne |
feat(AlgebraicTopology): `SimplexCategory.toTop_map_δ_apply` |
---
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t-algebraic-topology
maintainer-merge
awaiting-author
merge-conflict
|
48/2 |
Mathlib/AlgebraicTopology/CechNerve.lean,Mathlib/AlgebraicTopology/SimplexCategory/Basic.lean,Mathlib/AlgebraicTopology/SimplexCategory/Defs.lean,Mathlib/AlgebraicTopology/TopologicalSimplex.lean,Mathlib/Data/Fin/SuccPred.lean |
5 |
17 |
['Raph-DG', 'dagurtomas', 'erdOne', 'github-actions', 'joelriou', 'mathlib-merge-conflicts', 'riccardobrasca'] |
robin-carlier assignee:robin-carlier |
75-54420 2 months ago |
77-15660 77 days ago |
4-43742 4 days |
| 37420 |
artie2000 author:artie2000 |
refactor: change definitions to avoid `ConvexCone` |
Change the definitions of `PointedCone.positive` and `PointedCone.closure` to avoid mentioning `ConvexCone`.
This PR is part of a series deprecating `ConvexCone`: https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/Replacing.20.60ConvexCone.60.20with.20.60PointedCone.60/with/582738985
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|
t-convex-geometry
maintainer-merge
|
10/4 |
Mathlib/Analysis/Convex/Cone/Closure.lean,Mathlib/Geometry/Convex/Cone/Pointed.lean |
2 |
3 |
['YaelDillies', 'github-actions', 'mathlib-merge-conflicts', 'ooovi', 'vihdzp'] |
nobody |
67-34014 2 months ago |
67-33262 67 days ago |
82-52284 82 days |
| 37603 |
Parcly-Taxel author:Parcly-Taxel |
refactor: review of `SetSemiring` |
* Rename `Set.up` and `SetSemiring.down` to `SetSemiring.ofSet` and `SetSemiring.toSet` respectively. Unprotect both and make them equivalences, following `FreeMonoid`.
* Derive `CompleteAtomicBooleanAlgebra` for `SetSemiring` immediately.
* Add `imageHom_id` and `imageHom_comp`. The three existing lemmas about `imageHom` are coalesced into `imageHom_apply`.
Ultimately inspired by https://github.com/leanprover-community/mathlib4/pull/36934#issuecomment-4183475568. |
maintainer-merge
merge-conflict
|
120/165 |
Mathlib/Algebra/Algebra/Operations.lean,Mathlib/Data/Set/Semiring.lean |
2 |
42 |
['Parcly-Taxel', 'YaelDillies', 'eric-wieser', 'github-actions', 'mathlib-merge-conflicts', 'sgouezel'] |
nobody |
53-75998 1 month ago |
53-75999 53 days ago |
22-34679 22 days |
| 38358 |
yuanyi-350 author:yuanyi-350 |
doc(1000.yaml): note more formalised theorems |
---
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|
documentation
maintainer-merge
|
9/2 |
docs/1000.yaml |
1 |
12 |
['YaelDillies', 'github-actions', 'grunweg', 'vihdzp', 'yuanyi-350'] |
nobody |
50-41016 1 month ago |
50-40457 50 days ago |
61-36798 61 days |
| 37053 |
artie2000 author:artie2000 |
refactor(Analysis/Convex/Cone): use `PointedCone` in Riesz extension theorem |
Change the statement of the Riesz extension theorem to take a `PointedCone` rather than a `ConvexCone`.
This PR is part of a series replacing `ConvexCone` with `PointedCone`. https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/Replacing.20.60ConvexCone.60.20with.20.60PointedCone.60/near/581184307
---
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|
t-convex-geometry
maintainer-merge
merge-conflict
|
15/12 |
Mathlib/Analysis/Convex/Cone/Extension.lean,Mathlib/Geometry/Convex/Cone/Pointed.lean |
2 |
9 |
['YaelDillies', 'artie2000', 'github-actions', 'mathlib-merge-conflicts', 'ocfnash'] |
nobody |
41-84211 1 month ago |
41-84212 41 days ago |
46-64967 46 days |
| 37928 |
AlexeyMilovanov author:AlexeyMilovanov |
refactor(Computability.Encoding): unbundle Γ and remove FinEncoding |
This PR unbundles the alphabet `Γ` from the `Encoding` structure and completely removes `FinEncoding`.
`Encoding`: The alphabet `Γ` is now an explicit parameter: `structure Encoding (α : Type u) (Γ : Type v)`.
`FinEncoding`: Removed. Finiteness is now handled via standard typeclasses (e.g., `[Fintype Γ] (e : Encoding α Γ)`).
Combinators: Functions like `finEncodingPair` are simplified to `encodingPair`, dropping the `fin` prefix and `[Fintype]` requirements where no longer needed.
Downstream: Mechanically updated `Mathlib.Computability` and `Mathlib.ModelTheory` to pass the explicit `Γ` and use `[Fintype Γ]` where `FinEncoding` was previously required.
|
new-contributor
maintainer-merge
|
87/67 |
Mathlib/Computability/Encoding.lean,Mathlib/ModelTheory/Encoding.lean |
2 |
9 |
['AlexeyMilovanov', 'dagurtomas', 'github-actions', 'vihdzp'] |
nobody |
39-76557 1 month ago |
46-41135 46 days ago |
72-18925 72 days |
| 37722 |
SabrinaJewson author:SabrinaJewson |
feat(Order/Cover): intervals equal singletons iff |
To complement `Set.Icc_eq_singleton_iff`, this introduces:
- `Set.Ioc_eq_singleton_iff` / `Set.Ico_eq_singleton_iff`
- `Set.Ico_eq_singleton_left_iff` / `Set.Ioc_eq_singleton_right_iff`
- `Set.Ioi_eq_singleton_iff` / `Set.Iio_eq_singleton_iff`
- `Set.Ioi_eq_singleton_top_iff` / `Set.Iio_eq_singleton_bot_iff`
- `Set.Ioo_eq_singleton_iff`
---
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|
t-order
new-contributor
awaiting-author
maintainer-merge
|
39/0 |
Mathlib/Order/Atoms.lean,Mathlib/Order/Cover.lean |
2 |
16 |
['Komyyy', 'SabrinaJewson', 'github-actions', 'mathlib-merge-conflicts'] |
bryangingechen assignee:bryangingechen |
39-9648 1 month ago |
41-49005 41 days ago |
35-7103 35 days |
| 39202 |
FordUniver author:FordUniver |
feat(Analysis/Calculus/Gradient): add `toDual_gradient` and companions |
Add `toDual_gradient`, `toDual_gradientWithin`, and the composed variants `toDual_comp_gradient`, `toDual_comp_gradientWithin` — the natural inverse direction of the gradient's defining equation `∇ f x := (toDual 𝕜 F).symm (fderiv 𝕜 f x)`. These identify `(toDual 𝕜 F) (∇ f x)` with `fderiv 𝕜 f x` (and the `gradientWithin` and composed forms with the corresponding fderiv versions), making the Riesz isomorphism between the two derivative views explicit. The proofs of `DifferentiableAt.hasGradientAt` and `DifferentiableWithinAt.hasGradientWithinAt` in the same file are simplified to use them.
Co-authored-by: Sebastian Pokutta <23001135+pokutta@users.noreply.github.com>
---
Came up while formalizing the descent lemma for Lipschitz-smooth functions, where being able to switch between `LipschitzWith K (fderiv ℝ f)` and `LipschitzWith K (∇ f)` is helpful, which with this PR becomes `toDual_comp_gradient ▸ (toDual ℝ F).isometry.lipschitzWith_iff K`. Also slightly simplifies two call sites in mathlib. |
maintainer-merge |
20/5 |
Mathlib/Analysis/Calculus/Gradient/Basic.lean |
1 |
5 |
['FordUniver', 'Komyyy', 'github-actions'] |
nobody |
25-35832 25 days ago |
36-10456 36 days ago |
42-21311 42 days |
| 39136 |
vihdzp author:vihdzp |
feat: more results on `Order.enum` |
Most importantly, we prove that the enumerator function of a cofinal set is normal iff the set is closed (under non-empty suprema).
---
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|
t-set-theory
t-order
maintainer-merge
|
90/7 |
Mathlib/Order/Cofinal.lean,Mathlib/SetTheory/Cardinal/Cofinality/Club.lean,Mathlib/SetTheory/Cardinal/Cofinality/Enum.lean,Mathlib/SetTheory/Ordinal/Topology.lean |
4 |
7 |
['YaelDillies', 'github-actions', 'mathlib-dependent-issues', 'mathlib-merge-conflicts', 'vihdzp'] |
nobody |
20-85450 20 days ago |
23-58565 23 days ago |
25-46529 25 days |
| 39975 |
gasparattila author:gasparattila |
chore: tag `(Continuous)LinearEquiv.prodCongr_symm` with `@[simp]` |
This is consistent with the other `prodCongr`s. Note that this also changes the type of `PiLp.sumPiLpEquivProdLpPiLp_symm_apply_ofLp`, which is now fully simplified.
---
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|
maintainer-merge |
5/5 |
Mathlib/LinearAlgebra/Prod.lean,Mathlib/MeasureTheory/Measure/Haar/InnerProductSpace.lean,Mathlib/Topology/Algebra/Module/Equiv.lean |
3 |
4 |
['github-actions', 'themathqueen'] |
nobody |
20-3875 20 days ago |
25-23148 25 days ago |
25-22551 25 days |
| 35753 |
Vilin97 author:Vilin97 |
feat(Topology/Algebra/Order): regular grid helpers and piecewise linear interpolation |
Make API for piecewise linear interpolation on regular grids. I need these to for ODE time-stepping methods, like forward Euler, and later Runge–Kutta methods.
Follow-up PR: #35755 (forward Euler method convergence).
I don't know if these numerical analysis ODE-solving methods even belong in mathlib. If someone could advise me on it, I would appreciate it.
---
The initial proof was produced by [Aristotle](https://aristotle.harmonic.fun). The code was iteratively refined (factoring out lemmas, golfing, simplifying proofs) using Claude Code.
- [ ] depends on: #38091 |
t-topology
new-contributor
LLM-generated
maintainer-merge
|
201/0 |
Mathlib.lean,Mathlib/Topology/Algebra/Order/PiecewiseLinear.lean |
2 |
59 |
['Vilin97', 'YanYablonovskiy', 'adomani', 'botbaki-review', 'copilot-pull-request-reviewer', 'dagurtomas', 'eric-wieser', 'github-actions', 'grunweg', 'j-loreaux', 'mathlib-dependent-issues', 'wwylele'] |
nobody |
18-72968 18 days ago |
51-83044 51 days ago |
84-36407 84 days |
| 37346 |
euprunin author:euprunin |
chore: golf using `grind` |
The goal of this PR is to decrease the number of times lemmas are called explicitly. Any decrease in compilation time is a welcome side effect, although it is not a primary objective.
Trace profiling results (differences <30 ms considered measurement noise):
* `✅️ SimpleGraph.Walk.IsPath.getVert_injOn`: unchanged 🎉
* `✅️ SimpleGraph.Walk.length_bypass_le`: unchanged 🎉
* `✅️ Rat.floor_intCast_div_natCast`: unchanged 🎉
* `✅️ InnerProductGeometry.norm_eq_of_angle_sub_eq_angle_sub_rev_of_angle_ne_pi`: unchanged 🎉
* `✅️ padicNorm.zero_of_padicNorm_eq_zero`: unchanged 🎉
Profiled using `set_option trace.profiler true in`.
---
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|
maintainer-merge
awaiting-zulip
merge-conflict
|
7/45 |
Mathlib/Combinatorics/SimpleGraph/Paths.lean,Mathlib/Data/Rat/Floor.lean,Mathlib/Geometry/Euclidean/Triangle.lean,Mathlib/NumberTheory/Padics/PadicNorm.lean |
4 |
23 |
['FernandoChu', 'bryangingechen', 'chenson2018', 'euprunin', 'faenuccio', 'github-actions', 'grunweg', 'mathlib-merge-conflicts'] |
nobody |
17-75564 17 days ago |
54-33293 54 days ago |
30-45859 30 days |
| 39956 |
SnirBroshi author:SnirBroshi |
feat(GroupTheory/IsPerfect): Grün's lemma |
Grün's lemma: In a perfect group (`commutator G = ⊤`), `center (G ⧸ center G) = ⊥`.
Also the `derivedSeries` and the `lowerCentralSeries` are a constant `⊤`, and the `upperCentralSeries` starts with `⊥` and afterwards is a constant `center G`.
---
[Wikipedia](https://en.wikipedia.org/wiki/Perfect_group#Gr.C3.BCn.27s_lemma)
[MathWorld](https://mathworld.wolfram.com/GruensLemma.html)
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|
t-group-theory
maintainer-merge
|
93/0 |
Mathlib/Algebra/Group/Subgroup/Ker.lean,Mathlib/GroupTheory/Commutator/Basic.lean,Mathlib/GroupTheory/IsPerfect.lean,Mathlib/GroupTheory/Nilpotent.lean,Mathlib/GroupTheory/Subgroup/Centralizer.lean |
5 |
19 |
['SnirBroshi', 'github-actions', 'tb65536'] |
tb65536 assignee:tb65536 |
14-8496 14 days ago |
14-8551 14 days ago |
19-39490 19 days |
| 40074 |
TJHeeringa author:TJHeeringa |
feat(Analysis/InnerProductSpace/TensorProduct): Add TensorProduct.mapL |
This PR defines `TensorProduct.mapL`, the continuous version of `TensorProduct.map`.
---
`Analysis/innerProductSpace/TensorProduct` has a TODO for a continuous version of `TensorProduct.map`. One place which contains a proof for this is at [stack](https://math.stackexchange.com/a/3934668). #38755 was lemma 1 of that. This PR is the remainder.
AI:
Used to generate `exists_repr`.
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|
t-analysis
new-contributor
large-import
maintainer-merge
|
254/9 |
Mathlib/Analysis/InnerProductSpace/TensorProduct.lean,Mathlib/Analysis/Normed/Operator/LinearIsometry.lean |
2 |
70 |
['JonBannon', 'TJHeeringa', 'github-actions', 'themathqueen'] |
themathqueen assignee:themathqueen |
13-31219 13 days ago |
13-31273 13 days ago |
14-76830 14 days |
| 40327 |
grunweg author:grunweg |
perf: lower priority for IsSimpleGroup.toNontrivial instances |
These instances have very weak keys ([Nontrivial, *]), hence are always applied. Let's try lowering their priority.
---
Benchmarking results are [slightly positive](https://github.com/leanprover-community/mathlib4/pull/40304#issuecomment-4640304473), but could also be noise.
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|
t-group-theory
maintainer-merge
|
4/0 |
Mathlib/GroupTheory/Subgroup/Simple.lean |
1 |
5 |
['github-actions', 'grunweg', 'tb65536'] |
tb65536 assignee:tb65536 |
11-63595 11 days ago |
15-46094 15 days ago |
15-45497 15 days |
| 40138 |
faenuccio author:faenuccio |
doc: fix the doc of two files about group actions |
|
documentation
t-group-theory
maintainer-merge
|
146/144 |
Mathlib/GroupTheory/GroupAction/Quotient.lean,Mathlib/GroupTheory/Schreier.lean |
2 |
31 |
['adomani', 'b-mehta', 'eric-wieser', 'faenuccio', 'github-actions', 'grunweg', 'jcommelin', 'tb65536'] |
tb65536 assignee:tb65536 |
10-55886 10 days ago |
13-47142 13 days ago |
15-32859 15 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.
---
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This comes from splitting up #25841 into smaller PRs.
[](https://gitpod.io/from-referrer/)
|
t-combinatorics
maintainer-merge
|
164/0 |
Mathlib.lean,Mathlib/Combinatorics/SimpleGraph/Extremal/Zarankiewicz.lean,Mathlib/Combinatorics/SimpleGraph/Maps.lean |
3 |
30 |
['SnirBroshi', 'YaelDillies', 'b-mehta', 'github-actions', 'mathlib-dependent-issues', 'mathlib-merge-conflicts', 'mitchell-horner'] |
nobody |
8-59711 8 days ago |
8-59763 8 days ago |
87-83948 87 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`.
---
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- [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.
[](https://gitpod.io/from-referrer/) |
t-combinatorics
maintainer-merge
|
329/0 |
Mathlib.lean,Mathlib/Combinatorics/SimpleGraph/Extremal/ErdosStoneSimonovits.lean |
2 |
19 |
['YaelDillies', 'b-mehta', 'github-actions', 'mathlib-dependent-issues', 'mathlib4-merge-conflict-bot', 'mitchell-horner', 'robin-carlier'] |
nobody |
8-58992 8 days ago |
8-59057 8 days ago |
109-72976 109 days |
| 39307 |
FordUniver author:FordUniver |
feat(Combinatorics/SimpleGraph/Copy): introduce `UnlabeledCopy` carrier subtype |
Adds `abbrev UnlabeledCopy A B := {B' : B.Subgraph // Nonempty (A ≃g B'.coe)}` and uses it to replace the previous inline filter-set body of `copyCount G H`. Drops the now unused legacy Finset-image bridge `copyCount_eq_card_image_copyToSubgraph`. Adds `uniqueUnlabeledCopyBot` instance so `copyCount_bot` is a one-liner via `Fintype.card_unique`.
Co-authored-by: Malte Jackisch <45597826+MaltyBlanket@users.noreply.github.com>
---
**Step 1/5 of the `Copy` / `InducedCopy` refactor-feat stack.**
This PR isolates the `UnlabeledCopy` type introduction and the count's type-form redefinition from the larger rename/convention work in the rest of the stack. Note that resolving the current clash in naming (`Copy` and `UnlabeledCopy` vs `labelledCopyCount` and `copyCount`) is part of #38745.
|
t-combinatorics
maintainer-merge
|
32/30 |
Mathlib/Combinatorics/SimpleGraph/Copy.lean |
1 |
9 |
['FordUniver', 'SnirBroshi', 'YaelDillies', 'github-actions', 'mathlib-bors', 'mathlib-merge-conflicts', 'mitchell-horner'] |
nobody |
7-47601 7 days ago |
9-4020 9 days ago |
38-55988 38 days |
| 40128 |
wwylele author:wwylele |
chore(LinearAlgebra/Matrix): avoid defeq abuse in cRank |
The previous definition of cRank uses Matrix as a function to the parameter of Set.range. This causes difficulties in downstream proofs when unfolding and applying lemmas. The new definition uses col to explicitly convert from Matrix to function.
---
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|
t-algebra
tech debt
maintainer-merge
label:t-algebra$ |
18/13 |
Mathlib/LinearAlgebra/Matrix/Defs.lean,Mathlib/LinearAlgebra/Matrix/Rank.lean |
2 |
22 |
['SnirBroshi', 'eric-wieser', 'github-actions', 'themathqueen', 'wwylele'] |
themathqueen assignee:themathqueen |
7-29961 7 days ago |
7-30065 7 days ago |
8-69599 8 days |
| 40530 |
j-loreaux author:j-loreaux |
feat: introduce `SelfAdjointDecompose` class |
---
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|
t-algebra
maintainer-merge
label:t-algebra$ |
70/27 |
Mathlib/Algebra/Order/Star/Basic.lean,Mathlib/Algebra/Order/Star/Real.lean,Mathlib/Analysis/CStarAlgebra/PositiveLinearMap.lean,Mathlib/Analysis/SpecialFunctions/ContinuousFunctionalCalculus/PosPart/Basic.lean,Mathlib/LinearAlgebra/Complex/Module.lean |
5 |
23 |
['eric-wieser', 'github-actions', 'j-loreaux', 'themathqueen'] |
nobody |
7-20484 7 days ago |
7-20552 7 days ago |
9-85431 9 days |
| 36376 |
jessealama author:jessealama |
feat(SimpleGraph): hamiltonian cycle from cyclic permutation |
This PR provides `IsHamiltonian.of_perm`, a bridge from `Equiv.Perm.IsCycle` to `SimpleGraph.IsHamiltonian`: if σ is a permutation that is a single cycle with full support on at least 3 elements, and each step `v → σ v` is an edge of `G`, then `G` is Hamiltonian.
### New definitions and lemmas
**`Mathlib/Data/List/Chain.lean`**:
- `IsChain.iterate`: `List.iterate f a n` is a chain under `r` whenever `r a (f a)` holds for all `a`
**`Mathlib/Data/List/Iterate.lean`**:
- `getLast_iterate`: the last element of `List.iterate f a n` is `f^[n - 1] a`
**`Mathlib/Combinatorics/SimpleGraph/Walk/Iterate.lean`** (new file):
- `Walk.iterate`: builds a walk of length `n` from `x` to `f^[n] x` for any function `f` with `G.Adj x (f x)` for all `x`, defined via `Walk.ofSupport`
- `Walk.length_iterate`, `Walk.support_iterate`, `Walk.edges_iterate`: basic API
**`Mathlib/GroupTheory/Perm/Cycle/Basic.lean`**:
- `IsCycleOn.injOn_pow_apply`: the map `n ↦ (f ^ n) a` is injective on `Finset.range #s`
**`Mathlib/GroupTheory/Perm/Cycle/Concrete.lean`**:
- `IsCycleOn.injOn_sym2_pow_apply`: the unordered-pair edge map `k ↦ s((f ^ k) a, (f ^ (k + 1)) a)` is injective on `[0, #s)` when `#s ≠ 2`
- `IsCycleOn.sym2_pow_apply_ne`: edge distinctness for cycle-on permutations — `s((f ^ k) a, (f ^ (k + 1)) a) ≠ s(a, f a)` when `k ≠ 0`, `k < #s`, and `#s ≠ 2`
- `Perm.toList_eq_range_map_pow`: expresses `toList` as a range map over powers
**`Mathlib/Combinatorics/SimpleGraph/Hamiltonian.lean`**:
- `cons_isHamiltonianCycle_iff`: a Hamiltonian path closed by an edge outside its support is a Hamiltonian cycle, and conversely
- `IsHamiltonian.of_perm`: the main theorem
---
- [x] depends on: #36307 |
t-combinatorics
maintainer-merge
awaiting-author
|
182/0 |
Mathlib.lean,Mathlib/Combinatorics/SimpleGraph/Hamiltonian.lean,Mathlib/Combinatorics/SimpleGraph/Hamiltonian/Perm.lean,Mathlib/Combinatorics/SimpleGraph/Walk/Iterate.lean,Mathlib/Data/List/Chain.lean,Mathlib/Data/List/Iterate.lean,Mathlib/GroupTheory/Perm/Cycle/Basic.lean,Mathlib/GroupTheory/Perm/Cycle/Concrete.lean |
8 |
81 |
['SnirBroshi', 'YaelDillies', 'github-actions', 'jessealama', 'mathlib-dependent-issues', 'mathlib-merge-conflicts', 'vlad902'] |
b-mehta assignee:b-mehta |
7-9868 7 days ago |
7-49529 7 days ago |
70-62332 70 days |
| 40628 |
FernandoChu author:FernandoChu |
feat(CategoryTheory): pseudofunctors preserve adjunctions |
|
t-category-theory
LLM-generated
large-import
maintainer-merge
|
66/7 |
Mathlib/CategoryTheory/Bicategory/Adjunction/Basic.lean,Mathlib/CategoryTheory/Bicategory/Functor/Prelax.lean |
2 |
6 |
['FernandoChu', 'dagurtomas', 'github-actions'] |
dagurtomas assignee:dagurtomas |
6-39350 6 days ago |
6-41075 6 days ago |
7-29520 7 days |
| 40669 |
mathlib-splicebot author:mathlib-splicebot |
chore(Algebra/Ring/Periodic): automated extraction from #38483 |
---
This PR was automatically created from PR #38483 by @jessealama via a [review comment](https://github.com/leanprover-community/mathlib4/pull/38483#discussion_r3420828318) by @themathqueen. |
maintainer-merge
t-algebra
label:t-algebra$ |
7/0 |
Mathlib/Algebra/Ring/Periodic.lean |
1 |
3 |
['github-actions', 'themathqueen'] |
nobody |
6-28400 6 days ago |
6-28474 6 days ago |
6-27877 6 days |
| 37190 |
cjrl author:cjrl |
feat(Combinatorics): set-valued pigeonhole principle |
This PR contributes two theorems to combinatorics:
- `exists_lt_card_cover_of_card_biUnion_lt_card` is a set-valued version of the pigeonhole principle.
- `sum_card_eq_sum_card_cover_biUnion` is a set theoretic corollary of a double counting result proved for bipartite graphs (`Finset.sum_card_bipartiteAbove_eq_sum_card_bipartiteBelow`). This was needed to prove the above pigeonhole principle.
The motivation for these results is our Latin Square PR #36698. These results were proved in less general terms in that PR, but are independent of Latin Square considerations and so we have generalized and moved them into more relevant files.
---
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[](https://gitpod.io/from-referrer/)
|
new-contributor
t-combinatorics
maintainer-merge
|
39/0 |
Mathlib/Combinatorics/Enumerative/DoubleCounting.lean,Mathlib/Combinatorics/Pigeonhole.lean |
2 |
27 |
['IvanRenison', 'YaelDillies', 'cjrl', 'ghseeli', 'github-actions', 'j-loreaux', 'vlad902'] |
nobody |
6-25244 6 days ago |
6-25244 6 days ago |
85-83661 85 days |
| 38531 |
SnirBroshi author:SnirBroshi |
feat(Combinatorics/SimpleGraph/Paths): `Walk.map` preserves more properties |
Adds some missing theorems about how `Walk.map` behaves with `IsTrail`/`IsPath`/`IsCircuit`/`IsCycle`.
Summary of what we have now, with the 8 new theorems and 8 renames marked:
```
IsTrail.of_map : (p.map f).IsTrail → p.IsTrail -- new
isTrail_map_iff_of_injective : f.Injective → (p.map f).IsTrail ↔ p.IsTrail -- renamed from map_isTrail_iff_of_injective
IsTrail.map : f.Injective → p.IsTrail → (p.map f).IsTrail -- renamed from map_isTrail_of_injective
IsPath.of_map : (p.map f).IsPath → p.IsPath
isPath_map_iff_of_injective : f.Injective → (p.map f).IsPath ↔ p.IsPath -- renamed from map_isPath_iff_of_injective
IsPath.map : f.Injective f → p.IsPath → (p.map f).IsPath -- renamed from map_isPath_of_injective
IsCircuit.of_map : (p.map f).IsCircuit → p.IsCircuit -- new
isCircuit_map_iff_of_injective : f.Injective → (p.map f).IsCircuit ↔ p.IsCircuit -- new
IsCircuit.map : f.Injective → p.IsCircuit → (p.map f).IsCircuit -- new
IsCycle.of_map : (p.map f).IsCycle → p.IsCycle -- new
isCycle_map_iff_of_injective : f.Injective → (p.map f).IsCycle ↔ p.IsCycle -- renamed from map_isCycle_iff_of_injective
IsCycle.map : f.Injective → p.IsCycle → (p.map f).IsCycle
isTrail_mapLe : G ≤ G' → (p.mapLe h).IsTrail ↔ p.IsTrail -- renamed from mapLe_isTrail
IsTrail.of_mapLe : G ≤ G' → (p.mapLe h).IsTrail → p.IsTrail
IsTrail.mapLe : G ≤ G' → p.IsTrail → (p.mapLe h).IsTrail
isPath_mapLe : G ≤ G' → (p.mapLe h).IsPath ↔ p.IsPath -- renamed from mapLe_isPath
IsPath.of_mapLe : G ≤ G' → (p.mapLe h).IsPath → p.IsPath
IsPath.mapLe : G ≤ G' → p.IsPath → (p.mapLe h).IsPath
isCircuit_mapLe : G ≤ G' → (p.mapLe h).IsCircuit ↔ p.IsCircuit -- new
IsCircuit.of_mapLe : G ≤ G' → (p.mapLe h).IsCircuit → p.IsCircuit -- new
IsCircuit.mapLe : G ≤ G' → p.IsCircuit → (p.mapLe h).IsCircuit -- new
isCycle_mapLe : G ≤ G' → (p.mapLe h).IsCycle ↔ p.IsCycle -- renamed from mapLe_isCycle
IsCycle.of_mapLe : G ≤ G' → (p.mapLe h).IsCycle → p.IsCycle
IsCycle.mapLe : G ≤ G' → p.IsCycle → (p.mapLe h).IsCycle
```
---
Also golfs `map_isPath_of_injective`/`IsPath.of_map`/`map_isTrail_iff_of_injective`, they don't need induction.
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[](https://gitpod.io/from-referrer/)
|
t-combinatorics
maintainer-merge
|
76/44 |
Mathlib/Combinatorics/SimpleGraph/Acyclic.lean,Mathlib/Combinatorics/SimpleGraph/Paths.lean |
2 |
3 |
['YaelDillies', 'github-actions'] |
nobody |
6-23565 6 days ago |
6-26480 6 days ago |
57-78138 57 days |
| 38528 |
SnirBroshi author:SnirBroshi |
feat(Combinatorics/SimpleGraph/Paths): some cycle lemmas are true for circuits |
Add `IsCircuit.{not_of_nil,ne_bot,three_le_length}` by using their corresponding `IsCycle` proofs.
Also golfs a bit.
---
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|
t-combinatorics
maintainer-merge
|
15/13 |
Mathlib/Combinatorics/SimpleGraph/Girth.lean,Mathlib/Combinatorics/SimpleGraph/Paths.lean |
2 |
4 |
['SnirBroshi', 'YaelDillies', 'github-actions'] |
nobody |
6-23517 6 days ago |
6-23757 6 days ago |
58-11638 58 days |
| 40254 |
joelriou author:joelriou |
feat(AlgebraicTopology): a nonsingular simplicial set is the colimit of standard simplices indexed by nondegenerate simplices |
---
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|
t-algebraic-topology
maintainer-merge
|
212/2 |
Mathlib.lean,Mathlib/AlgebraicTopology/SimplicialSet/NonDegenerateSimplicesColimit.lean,Mathlib/AlgebraicTopology/SimplicialSet/Nonsingular.lean,Mathlib/AlgebraicTopology/SimplicialSet/NonsingularColimit.lean,Mathlib/AlgebraicTopology/SimplicialSet/StdSimplex.lean |
5 |
3 |
['dagurtomas', 'github-actions'] |
nobody |
6-16953 6 days ago |
6-17046 6 days ago |
17-29543 17 days |
| 40515 |
j-loreaux author:j-loreaux |
feat: `Monoid` and `Group` instances for `OrderHom` and `OrderIso` |
These will be used in an upcoming PR to turn `fun x ↦ (x * · * star x)` into a term of type `R →* (R →o R)` when `R` is a `StarOrderedRing`, and likewise also `Rˣ →* (R ≃o R)`.
---
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t-algebra
t-order
large-import
maintainer-merge
label:t-algebra$ |
45/0 |
Mathlib/Algebra/Order/Group/End.lean,Mathlib/Data/FunLike/IsApply.lean |
2 |
23 |
['eric-wieser', 'github-actions', 'j-loreaux', 'themathqueen'] |
nobody |
6-15754 6 days ago |
8-59176 8 days ago |
10-31578 10 days |
| 40668 |
JovanGerb author:JovanGerb |
chore(Tactic/Linarith/Parsing): remove local abbrev for `TreeMap` |
We can now write `TreeMap`, and `Ord.compare` is filled in automatically.
---
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|
t-meta
maintainer-merge
|
7/10 |
Mathlib/Tactic/Linarith/Parsing.lean |
1 |
3 |
['github-actions', 'grunweg'] |
nobody |
6-15477 6 days ago |
6-28060 6 days ago |
6-27463 6 days |
| 40491 |
zw810-ctrl author:zw810-ctrl |
feat(Algebra): range_prodMap for MonoidHom, RingHom, AlgHom |
---
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|
t-algebra
new-contributor
maintainer-merge
label:t-algebra$ |
34/1 |
Mathlib/Algebra/Algebra/Subalgebra/Prod.lean,Mathlib/Algebra/Group/Subgroup/Basic.lean,Mathlib/Algebra/Group/Submonoid/Operations.lean,Mathlib/Algebra/Ring/Subring/Basic.lean,Mathlib/Algebra/Ring/Subsemiring/Basic.lean,Mathlib/RingTheory/Ideal/Prod.lean |
6 |
19 |
['eric-wieser', 'github-actions', 'themathqueen', 'zw810-ctrl'] |
nobody |
6-14908 6 days ago |
6-14983 6 days ago |
10-60140 10 days |
| 38529 |
SnirBroshi author:SnirBroshi |
feat(Combinatorics/SimpleGraph/Girth): `egirth ⊤ = 3` when there are at least 3 vertices |
Since `Nontrivial` is not enough, we use the condition `3 ≤ ENat.card α`.
---
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|
t-combinatorics
maintainer-merge
|
17/0 |
Mathlib/Combinatorics/SimpleGraph/Girth.lean |
1 |
7 |
['SnirBroshi', 'YaelDillies', 'github-actions', 'mathlib-merge-conflicts', 'vlad902'] |
nobody |
5-49252 5 days ago |
7-26280 7 days ago |
56-19504 56 days |
| 39793 |
grunweg author:grunweg |
feat: make the `dupNamespace` linter catch any duplicate namespace(s) |
Before this PR, the `dupNamespace` linter would only flag a namespace as duplicate if it was repeated in two consecutive positions: `Foo.Foo.bar` would be linted, but neither `Foo.Bar.Foo.Bar.baz` nor `Foo.Bar.Foo.Baz.baz` would be (even though they are very likely unintentional).
Strengthen the linter check, to error if any namespace component is duplicated.
This has few false positives (which we manually annotate), but catches many pre-existing
cases where the duplication was clearly unintentional and undesirable.
Most of the mathlib adaptation was done in #39794.
---
- [x] depends on: #39794
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|
t-linter
maintainer-merge
|
187/21 |
Mathlib/Algebra/Polynomial/Bivariate.lean,Mathlib/Analysis/InnerProductSpace/JointEigenspace.lean,Mathlib/CategoryTheory/Bicategory/Adjunction/Adj.lean,Mathlib/CategoryTheory/Groupoid/VertexGroup.lean,Mathlib/CategoryTheory/Subobject/Classifier/Defs.lean,Mathlib/Data/Set/FiniteExhaustion.lean,Mathlib/Geometry/Manifold/VectorBundle/MDifferentiable.lean,Mathlib/GroupTheory/Submonoid/Inverses.lean,Mathlib/LinearAlgebra/FreeModule/Basic.lean,Mathlib/Logic/Equiv/Set.lean,Mathlib/NumberTheory/NumberField/Completion/FinitePlace.lean,Mathlib/NumberTheory/NumberField/InfinitePlace/Basic.lean,Mathlib/Order/Filter/Germ/Basic.lean,Mathlib/RingTheory/Etale/Basic.lean,Mathlib/RingTheory/Finiteness/Basic.lean,Mathlib/RingTheory/TensorProduct/Maps.lean,Mathlib/Tactic/Linter/Lint.lean,MathlibTest/Lint.lean |
18 |
51 |
['SnirBroshi', 'github-actions', 'grunweg', 'joneugster', 'kim-em', 'leanprover-radar', 'mathlib-dependent-issues', 'thorimur'] |
joneugster and thorimur assignee:joneugster assignee:thorimur |
5-20032 5 days ago |
5-20351 5 days ago |
15-8334 15 days |
| 39898 |
yuanyi-350 author:yuanyi-350 |
refactor(Analysis): golf `Mathlib/Analysis/Normed/Unbundled/AlgebraNorm` |
- refactors `Normed/Unbundled/AlgebraNorm` by using structure inheritance in `MulRingNorm.toRingNorm`
---
Extracted from #37968
[](https://gitpod.io/from-referrer/) |
codex
t-analysis
LLM-generated
maintainer-merge
|
2/5 |
Mathlib/Analysis/Normed/Unbundled/AlgebraNorm.lean |
1 |
11 |
['ADedecker', 'JonBannon', 'faenuccio', 'github-actions', 'j-loreaux', 'themathqueen', 'yuanyi-350'] |
nobody |
5-16966 5 days ago |
11-50278 11 days ago |
26-11443 26 days |
| 40722 |
grunweg author:grunweg |
fix: correct deprecation for orthogonalProjection_mem_subspace_orthog… |
…onalComplement_eq_zero
#38970 tried to create one, but made a slip (and created a deprecated alias for a declaration that never existed). Correct this oversight. Noticed during leanprover-community/sphere-eversion#143.
---
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maintainer-merge
t-analysis
|
2/1 |
Mathlib/Analysis/InnerProductSpace/Projection/Basic.lean |
1 |
2 |
['github-actions', 'themathqueen'] |
nobody |
5-14745 5 days ago |
5-14813 5 days ago |
5-14216 5 days |
| 37598 |
IvanRenison author:IvanRenison |
feat(Combinatorics/SimpleGraph/Coloring): add lemmas about coloring and maps |
---
Idea from this Zulip thread: [graph theory>Second Order Monadic Logic for Graph](https://leanprover.zulipchat.com/#narrow/channel/252551-graph-theory/topic/Second.20Order.20Monadic.20Logic.20for.20Graph/with/583013775)
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t-combinatorics
maintainer-merge
merge-conflict
|
32/11 |
Mathlib/Combinatorics/SimpleGraph/Coloring/Vertex.lean,Mathlib/Combinatorics/SimpleGraph/Maps.lean |
2 |
35 |
['IvanRenison', 'SnirBroshi', 'YaelDillies', 'b-mehta', 'github-actions', 'mathlib-bors', 'mathlib-merge-conflicts', 'vlad902'] |
nobody |
4-51733 4 days ago |
9-50864 9 days ago |
63-65371 63 days |
| 35255 |
vlad902 author:vlad902 |
feat(SimpleGraph): `cycleGraph` is contained in every graph with a cycle |
---
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|
t-combinatorics
maintainer-merge
|
34/0 |
Mathlib/Combinatorics/SimpleGraph/Circulant.lean |
1 |
4 |
['YaelDillies', 'github-actions', 'mathlib-dependent-issues', 'mathlib-merge-conflicts'] |
nobody |
4-49906 4 days ago |
7-12669 7 days ago |
54-85182 54 days |
| 40634 |
grunweg author:grunweg |
feat: PiLp.equivOfUnique |
Add the isomorphism between `PiLp` over any `Unique` index type and the corresponding individual type.
Generalise `PiLp.linearEquiv` to topological vector spaces, then this is straightforward.
This will be used in #29077, to yield an equivalence `EuclideanSpace 𝕜 (Fin 1) ≃L[𝕜] 𝕜`.
---
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|
t-analysis
maintainer-merge
|
14/2 |
Mathlib/Analysis/Normed/Lp/PiLp.lean |
1 |
45 |
['eric-wieser', 'github-actions', 'grunweg', 'themathqueen', 'wwylele'] |
nobody |
4-41267 4 days ago |
4-85124 4 days ago |
6-17757 6 days |
| 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.
---
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|
t-meta
awaiting-author
maintainer-merge
|
236/0 |
Mathlib.lean,Mathlib/Tactic.lean,Mathlib/Tactic/DuplicateDecls.lean,MathlibTest/Tactic/DuplicateDecls.lean,MathlibTest/Tactic/DuplicateDeclsAux.lean |
5 |
18 |
['JovanGerb', 'bryangingechen', 'github-actions', 'thorimur'] |
dwrensha and thorimur assignee:dwrensha assignee:thorimur |
4-12741 4 days ago |
12-63741 12 days ago |
16-52955 16 days |
| 40787 |
Mal-Pat author:Mal-Pat |
doc(Combinatorics/SimpleGraph/Girth): fix incorrect TODO statement |
The TODO statement `G.egirth ≤ 2 * G.ediam + 1` on its own is incorrect - a finite acyclic graph has `G.egirth = ∞` with finite `G.ediam`. The condition that `G` must not be acyclic has been added to the statement to make it correct.
Also, the condition that the diameter must be non-zero is not required to prove `¬ G.IsAcyclic → G.egirth ≤ 2 * G.ediam + 1`.
---
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|
t-combinatorics
new-contributor
maintainer-merge
|
2/2 |
Mathlib/Combinatorics/SimpleGraph/Girth.lean |
1 |
3 |
['YaelDillies', 'github-actions'] |
nobody |
3-50617 3 days ago |
3-81630 3 days ago |
3-81033 3 days |
| 39703 |
YaelDillies author:YaelDillies |
chore: create a `Basic` top folder |
Move a select few folders from `Logic` to a new `Basic` folder.
The goal is to finally move the material misplaced in the `Data` and `Logic` folder and to clarify the various expectations of each folder. Ultimately:
* the `Basic` folder will be about basic predicates on types and basic mathematical types not fitting in any other folder;
* the `Data` folder will be about data structures, instead of the current mix of data structures and basic mathematical types not fitting in any other folder;
* the `Logic` folder will be about advanced logic results not fitting in either `ModelTheory` or `SetTheory`, instead of the current mix of basic predicates on types and advanced logic results.
Many more files (~1000) could be moved, so I will do it in several PRs. Not all files should move to `Basic`. Some files should go to `Algebra.Order` instead (eg `Data.Nat.Lattice`) and some should be straight out deprecated (eg `Data.Analysis`).
[Zulip discussion](https://leanprover.zulipchat.com/#narrow/channel/345428-mathlib-reviewers/topic/Basic.20folder/with/597151406)
---
This PR stems from discussions at the MI retreat 2026.
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[](https://gitpod.io/from-referrer/)
|
file-removed
t-data
maintainer-merge
|
148/95 |
Counterexamples/Girard.lean,Mathlib.lean,Mathlib/Algebra/CharZero/Defs.lean,Mathlib/Algebra/Group/Irreducible/Defs.lean,Mathlib/Algebra/Group/Nat/Units.lean,Mathlib/Algebra/Group/Pi/Basic.lean,Mathlib/Algebra/Group/Units/Basic.lean,Mathlib/Algebra/Group/WithOne/Defs.lean,Mathlib/Algebra/GroupWithZero/Basic.lean,Mathlib/Algebra/GroupWithZero/Defs.lean,Mathlib/Algebra/Module/Presentation/Free.lean,Mathlib/Algebra/Module/Projective.lean,Mathlib/Algebra/NeZero.lean,Mathlib/Basic/Denumerable.lean,Mathlib/Basic/ExistsUnique.lean,Mathlib/Basic/IsEmpty.lean,Mathlib/Basic/IsEmpty/Basic.lean,Mathlib/Basic/IsEmpty/Defs.lean,Mathlib/Basic/Logic/Basic.lean,Mathlib/Basic/Logic/Lemmas.lean,Mathlib/Basic/Nonempty.lean,Mathlib/Basic/Nontrivial/Basic.lean,Mathlib/Basic/Nontrivial/Defs.lean,Mathlib/Basic/README.md,Mathlib/Basic/Unique.lean,Mathlib/Basic/UnivLE.lean,Mathlib/CategoryTheory/EssentiallySmall.lean,Mathlib/CategoryTheory/Limits/Types/Colimits.lean,Mathlib/CategoryTheory/Limits/Types/Limits.lean,Mathlib/CategoryTheory/UnivLE.lean,Mathlib/Combinatorics/Quiver/Path.lean,Mathlib/Computability/Primrec/Basic.lean,Mathlib/Data/Bool/Basic.lean,Mathlib/Data/FunLike/Basic.lean,Mathlib/Data/List/Basic.lean,Mathlib/Data/List/GetD.lean,Mathlib/Data/Nat/Basic.lean,Mathlib/Data/Nat/MaxPowDiv.lean,Mathlib/Data/Option/Basic.lean,Mathlib/Data/Quot.lean,Mathlib/Data/README.md,Mathlib/Data/Rat/Denumerable.lean,Mathlib/Data/TwoPointing.lean,Mathlib/Lean/Meta/CongrTheorems.lean,Mathlib/LinearAlgebra/Matrix/Defs.lean,Mathlib/Logic/Equiv/Defs.lean,Mathlib/Logic/Equiv/List.lean,Mathlib/Logic/Function/Basic.lean,Mathlib/Logic/README.md,Mathlib/Order/OrderIsoNat.lean,Mathlib/Order/RelClasses.lean,Mathlib/Order/WithBot.lean,Mathlib/RingTheory/Coprime/Basic.lean,Mathlib/SetTheory/Cardinal/Basic.lean,Mathlib/SetTheory/Cardinal/UnivLE.lean,Mathlib/SetTheory/ZFC/Rank.lean,Mathlib/Tactic/CancelDenoms/Core.lean,Mathlib/Tactic/CongrExclamation.lean,Mathlib/Tactic/ITauto.lean,Mathlib/Tactic/Linter/DirectoryDependency.lean,Mathlib/Tactic/Nontriviality/Core.lean,Mathlib/Tactic/Push.lean,Mathlib/Tactic/Subsingleton.lean,Mathlib/Tactic/Tauto.lean,Mathlib/Testing/Plausible/Testable.lean,Mathlib/Topology/Order/UpperLowerSetTopology.lean,MathlibTest/Linter/PrivateModule/ImportOnly.lean,scripts/autolabel.lean,scripts/noshake.json |
69 |
29 |
['SnirBroshi', 'YaelDillies', 'github-actions', 'grunweg', 'joneugster', 'mathlib-merge-conflicts', 'themathqueen'] |
joneugster assignee:joneugster |
3-46757 3 days ago |
4-43961 4 days ago |
25-28147 25 days |
| 40088 |
jeangud author:jeangud |
fix(Tactic/Linter/DocString): avoid false positive in syntax quotation patterns |
Fix a false-positive in the `linter.style.docString.empty` linter with pattern matching:
```lean
/-- Checks if a command has the `AMS` attribute. -/
def toAMS (stx : TSyntax ``Command.declModifiers) :
CommandElabM (Array <| TSyntaxArray `num) := do
match stx with
| `(declModifiers| $(_)? @[$[$atts],*] $(_)? $(_)? $(_)? $(_)?) =>
atts.filterMapM fun att ↦ do
match att with
| `(attrInstance | AMS $nums*) => return some nums
| _ => return none
| _ => return #[]
```
This can be addressed by ensuring the syntax kind of the doc string is ``` ``Parser.Command.docComment``` as syntax quotation uses an antiquotation syntax instead.
- :robot: Implemented and test with **Gemini 3.1 Pro**. This change is pretty targeted so I did not have much to redo except reviewing.
---
<details>
<summary>Old, noisy description</summary>
# Description
Syntax quotations are a key meta-programming feature for Lean 4, but the `linter.style.docString.empty` linter currently does not handle them correctly.
This PR:
- Closes #40087
- Adds a regression test for syntax quotation patterns
- :robot: Implemented and test with **Gemini 3.1 Pro**. This change is pretty targeted so I did not have much to redo except reviewing.
**Example false positive:**
In the [formal-conjectures](https://github.com/google-deepmind/formal-conjectures) repository, the `AMSLinter`:
```lean
/-- Checks if a command has the `AMS` attribute. -/
def toAMS (stx : TSyntax ``Command.declModifiers) :
CommandElabM (Array <| TSyntaxArray `num) := do
match stx with
| `(declModifiers| $(_)? @[$[$atts],*] $(_)? $(_)? $(_)? $(_)?) =>
atts.filterMapM fun att ↦ do
match att with
| `(attrInstance | AMS $nums*) => return some nums
| _ => return none
| _ => return #[]
```
**Proposed Fix:** We can fix this by explicitly checking the kind of the docstring node before processing it. Pattern nodes from syntax quotations use antiquotations for the docstring slot (like `$(_)?`), which have a different syntax kind than actual doc comments. Filtering by `docStx.getKind == ``Parser.Command.docComment` successfully filters out the false positives while keeping the linter working for actual source code:
```lean
if docStx.isMissing then continue -- this is probably superfluous, thanks to `some pos` above.
if docStx.getKind != ``Parser.Command.docComment then continue -- ignore antiquotations from syntax patterns like `$(_)?`
```
# Testing
:white_check_mark: Builds successfully
```shell
$ lake build Mathlib.Tactic.Linter.DocString
Build completed successfully (4 jobs).
```
:white_check_mark: Tests pass
```shell
$ lake build MathlibTest.Linter.DocString
Build completed successfully (6 jobs).
```
**Before :x:**
```shell
$ lake build ./FormalConjectures/Util/Linters/AMSLinter.lean
⚠ [68/68] Built FormalConjectures.Util.Linters.AMSLinter
warning: FormalConjectures/Util/Linters/AMSLinter.lean:48:21: warning: this doc-string is empty
Note: This linter can be disabled with `set_option linter.style.docString.empty false`
warning: FormalConjectures/Util/Linters/AMSLinter.lean:69:27: warning: this doc-string is empty
Note: This linter can be disabled with `set_option linter.style.docString.empty false`
Build completed successfully (68 jobs).
```
**After :white_check_mark:**
```shell
$ lake build ./FormalConjectures/Util/Linters/AMSLinter.lean
Build completed successfully (25 jobs).
```
</details> |
t-linter
new-contributor
LLM-generated
maintainer-merge
|
19/0 |
Mathlib/Tactic/Linter/DocString.lean,MathlibTest/Linter/DocString.lean |
2 |
8 |
['github-actions', 'jeangud', 'joneugster'] |
nobody |
3-41799 3 days ago |
19-10006 19 days ago |
20-63452 20 days |
| 31513 |
amellendijk author:amellendijk |
feat(Tactic): `polynomial(_nf)` tactics |
Implement tactic for proving equality of polynomials.
This tactic is part of a larger suite (see https://github.com/leanprover-community/mathlib4/pull/30374).
Also generalize the preprocessing step for `algebra` so that it always replaces `algebraMap R A r` with `r • 1` instead of only when `R` is `Nat` or `Int`. This was an oversight in `algebra` that broke `polynomial`.
- [x] depends on: #31508
---
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|
t-meta
maintainer-merge
|
468/49 |
Mathlib.lean,Mathlib/Algebra/MvPolynomial/Basic.lean,Mathlib/RingTheory/Polynomial/Basic.lean,Mathlib/Tactic.lean,Mathlib/Tactic/Algebra/AlgebraNF.lean,Mathlib/Tactic/Algebra/Basic.lean,Mathlib/Tactic/Polynomial/Basic.lean,Mathlib/Tactic/Polynomial/Core.lean,MathlibTest/Tactic/Polynomial.lean |
9 |
41 |
['amellendijk', 'github-actions', 'joneugster', 'mathlib-dependent-issues', 'mathlib-merge-conflicts', 'mathlib4-merge-conflict-bot'] |
Vierkantor and joneugster assignee:Vierkantor assignee:joneugster |
3-39804 3 days ago |
13-33215 13 days ago |
29-27433 29 days |
| 40774 |
riccardobrasca author:riccardobrasca |
chore: remove useless lines |
---
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|
t-number-theory
maintainer-merge
|
0/2 |
Mathlib/NumberTheory/RamificationInertia/Galois.lean |
1 |
5 |
['github-actions', 'leanprover-radar', 'riccardobrasca', 'tb65536'] |
nobody |
3-38245 3 days ago |
3-45321 3 days ago |
3-44724 3 days |
| 37963 |
martinwintermath author:martinwintermath |
feat(LinearAlgebra/SesquilinearForm): moving orthogonality to own file |
Move `Submodule.orthogonalBilin` and all lemmas that use it from SesquilinearForm/Basic.lean to its own file SesquilinearForm/Orthogonal.lean.
We also add `gcongr` to `orthogonalBilin_le`.
---
This PR was split off from #40746, which adds the actual new features.
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[](https://gitpod.io/from-referrer/)
|
t-algebra
maintainer-merge
label:t-algebra$ |
144/110 |
Mathlib.lean,Mathlib/Analysis/InnerProductSpace/Orthogonal.lean,Mathlib/LinearAlgebra/BilinearForm/Orthogonal.lean,Mathlib/LinearAlgebra/QuadraticForm/Basic.lean,Mathlib/LinearAlgebra/SesquilinearForm/Basic.lean,Mathlib/LinearAlgebra/SesquilinearForm/Orthogonal.lean |
6 |
12 |
['github-actions', 'jcommelin', 'martinwintermath', 'mathlib-dependent-issues', 'mathlib-merge-conflicts', 'themathqueen'] |
nobody |
3-8547 3 days ago |
3-8601 3 days ago |
4-66351 4 days |
| 38589 |
vlad902 author:vlad902 |
feat(SimpleGraph): add universal vertex predicate |
Add the predicate `G.IsUniversal v` to indicate that `v` is a universal vertex, i.e. connected to all other vertices in `G`. This matches the recently added `G.IsIsolated v` predicate for isolated vertices.
Co-authored-by: Justin Lai <justsoft.jsoft@gmail.com>
---
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Moves:
- Vector.* -> List.Vector.*
- ...
Deletions:
- Nat.bit1_add_bit1
- ...
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-->
[](https://gitpod.io/from-referrer/)
|
t-combinatorics
maintainer-merge
|
111/18 |
Mathlib/Combinatorics/SimpleGraph/Basic.lean,Mathlib/Combinatorics/SimpleGraph/Connectivity/Connected.lean,Mathlib/Combinatorics/SimpleGraph/Finite.lean,Mathlib/Combinatorics/SimpleGraph/Star.lean,Mathlib/Combinatorics/SimpleGraph/Tutte.lean,Mathlib/Combinatorics/SimpleGraph/UniversalVerts.lean |
6 |
37 |
['8e7', 'Rida-Hamadani', 'SnirBroshi', 'YaelDillies', 'github-actions', 'mathlib-merge-conflicts', 'vlad902'] |
nobody |
3-6356 3 days ago |
3-7457 3 days ago |
53-10474 53 days |
| 38830 |
Jun2M author:Jun2M |
feat(Data/List): Nodup and head & getLast lemmas |
Given a Nodup list:
* If a prefix contains the last element, they are equal
* If a suffix contains the first element, they are equal
* If an infix contains the first element, it is a prefix
* If an infix contains the last element, it is a suffix
* If the first and the last element are the same, it is a singleton
* `countP` is cardinality of the filter of `toFinset`.
---
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t-data
maintainer-merge
|
32/0 |
Mathlib/Data/Finset/Basic.lean,Mathlib/Data/Finset/Card.lean,Mathlib/Data/List/Nodup.lean |
3 |
16 |
['Jun2M', 'SnirBroshi', 'b-mehta', 'github-actions', 'joneugster', 'mathlib-merge-conflicts'] |
joneugster assignee:joneugster |
2-81119 2 days ago |
3-14197 3 days ago |
38-41709 38 days |
| 35295 |
Rida-Hamadani author:Rida-Hamadani |
feat(SimpleGraph): `dropLast` of a cycle is a path |
---
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t-combinatorics
maintainer-merge
|
3/0 |
Mathlib/Combinatorics/SimpleGraph/Paths.lean |
1 |
21 |
['Rida-Hamadani', 'SnirBroshi', 'YaelDillies', 'github-actions', 'mathlib-merge-conflicts', 'vlad902'] |
nobody |
2-80947 2 days ago |
2-81002 2 days ago |
40-78522 40 days |
| 39693 |
yuanyi-350 author:yuanyi-350 |
feat(Combinatorics/Enumerative/Bell): sum over partition shapes |
Kill TODO in `Mathlib/Combinatorics/Enumerative/Bell.lean` which proves `Nat.bell` as a sum of `Multiset.bell` over partition shapes
---
Migrated from #37690
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t-combinatorics
maintainer-merge
|
121/35 |
Mathlib/Combinatorics/Enumerative/Bell.lean |
1 |
8 |
['YaelDillies', 'eric-wieser', 'github-actions'] |
nobody |
2-71376 2 days ago |
2-71432 2 days ago |
31-31122 31 days |
| 40801 |
Mal-Pat author:Mal-Pat |
feat(Combinatorics/SimpleGraph/Paths): `p.IsPath → p.bypass = p` |
A useful lemma - if `p` is a path, then `p.bypass = p`.
---
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|
t-combinatorics
new-contributor
maintainer-merge
|
4/0 |
Mathlib/Combinatorics/SimpleGraph/Paths.lean |
1 |
10 |
['Mal-Pat', 'SnirBroshi', 'YaelDillies', 'github-actions', 'mathlib-bors'] |
nobody |
2-50844 2 days ago |
2-50899 2 days ago |
2-50302 2 days |
| 40796 |
luigi-massacci author:luigi-massacci |
feat(Analysis/Distribution/Support): version for D' of existing lemmas for S' |
This is an almost direct copy-paste of the existing lemmas for tempered distributions to generic distributions.
---
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|
t-analysis
easy
maintainer-merge
|
86/3 |
Mathlib/Analysis/Distribution/Distribution.lean,Mathlib/Analysis/Distribution/Support.lean |
2 |
7 |
['github-actions', 'luigi-massacci', 'mcdoll'] |
nobody |
2-17727 2 days ago |
2-17777 2 days ago |
3-38630 3 days |
| 36018 |
wwylele author:wwylele |
feat(LinearAlgebra/AffineSpace): parallel cross-section of a simplex |
This shows that the intersection of `AffineSubspace.shift` of the base of a simplex and the interior of the simplex is a smaller simplex. This is preparing to calculate the volume of a simplex by integrating this cross-section. Part of #37910.
---
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|
t-algebra
large-import
maintainer-merge
label:t-algebra$ |
133/1 |
Mathlib/LinearAlgebra/AffineSpace/AffineSubspace/Shift.lean,Mathlib/LinearAlgebra/AffineSpace/Simplex/Basic.lean |
2 |
17 |
['alreadydone', 'copilot-pull-request-reviewer', 'github-actions', 'mathlib-bors', 'mathlib-dependent-issues', 'wwylele'] |
alreadydone assignee:alreadydone |
1-64299 1 day ago |
1-64351 1 day ago |
63-54875 63 days |
| 40228 |
thorimur author:thorimur |
chore: clean up `backward.privateInPublic` around `d₂₃` |
Moves a single-use private declaration into a let declaration.
This reduces instructions in that file by ~29% (but this gets swallowed in the overall noise).
Note: currently `LieModule.Cohomology.d₂₃_aux._proof_17` is the biggest proof in mathlib (counted with sharing) :) This PR changes it to `CategoryTheory.Functor.IsDenseSubsite.isIso_ranCounit_app_of_isDenseSubsite`.
---
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t-algebra
tech debt
maintainer-merge
label:t-algebra$ |
11/17 |
Mathlib/Algebra/Lie/Cochain.lean |
1 |
26 |
['JovanGerb', 'b-mehta', 'github-actions', 'grunweg', 'leanprover-radar', 'mathlib-merge-conflicts', 'thorimur'] |
jjdishere assignee:jjdishere |
1-41222 1 day ago |
2-82658 2 days ago |
17-33921 17 days |
| 40547 |
Marygold-Dusk author:Marygold-Dusk |
feat: submersions are `C^n` |
The conventional textbook definition demands that a submersion be smooth.
When asking for the submersion to have local slice charts (as we do), this implies smoothness automatically.
Co-authored-by: Michael Rothgang <rothgang@math.uni-bonn.de>. |
t-differential-geometry
new-contributor
maintainer-merge
|
57/7 |
Mathlib/Geometry/Manifold/Submersion.lean |
1 |
40 |
['Marygold-Dusk', 'github-actions', 'grunweg', 'sgouezel'] |
grunweg assignee:grunweg |
1-16166 1 day ago |
1-16226 1 day ago |
2-58636 2 days |
| 31361 |
alreadydone author:alreadydone |
feat(Algebra/Order): convex subgroups |
---
- [x] depends on: #32886
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t-algebra
t-order
maintainer-merge
label:t-algebra$ |
343/0 |
Mathlib.lean,Mathlib/Algebra/Order/Archimedean/Class.lean,Mathlib/Algebra/Order/Group/Convex.lean,Mathlib/Order/Birkhoff.lean,Mathlib/Order/Quotient.lean |
5 |
81 |
['Vierkantor', 'YaelDillies', 'alreadydone', 'faenuccio', 'github-actions', 'kckennylau', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot', 'vihdzp', 'wwylele'] |
faenuccio assignee:faenuccio |
0-83586 23 hours ago |
0-83637 23 hours ago |
43-31815 43 days |
| 39720 |
vihdzp author:vihdzp |
feat: cofinality within order |
We introduce `Order.cofWithin x = Order.cof (Iio x)` for the cofinality of an element within a preorder. This generalizes `Ordinal.cof`, with the caveat that `cof o : Cardinal.{u}` for `o : Ordinal.{u}`, whereas `cofWithin o : Cardinal.{u + 1}`.
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t-set-theory
maintainer-merge
|
104/14 |
Mathlib/SetTheory/Cardinal/Basic.lean,Mathlib/SetTheory/Cardinal/Cofinality/Basic.lean,Mathlib/SetTheory/Cardinal/Cofinality/Ordinal.lean |
3 |
11 |
['SnirBroshi', 'YaelDillies', 'b-mehta', 'github-actions', 'mathlib-merge-conflicts', 'vihdzp'] |
nobody |
0-72968 20 hours ago |
27-56095 27 days ago |
30-74883 30 days |
| 40694 |
pechersky author:pechersky |
feat(Algebra/Group/Hom): upgrade a MulHom to a MonoidHomClass when codomain is left-cancellative |
Allows for easier manipulation when inv and div is taken over terms mapped by MulHoms
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|
t-algebra
easy
maintainer-merge
label:t-algebra$ |
17/0 |
Mathlib/Algebra/Group/Hom/Defs.lean |
1 |
13 |
['github-actions', 'jjdishere', 'leanprover-radar', 'pechersky', 'riccardobrasca'] |
nobody |
0-47559 13 hours ago |
3-25883 3 days ago |
4-28690 4 days |
| 40763 |
bryangingechen author:bryangingechen |
ci: let bors manage PR lifecycle labels |
After https://github.com/leanprover-community/bors-ng/pull/53, bors is now capable of managing PR lifecycle labels directly from its own state (queue membership and delegations), opt-in via a `[labels]` table in `bors.toml`. This fixes `delegated` labels stranded by expirations, as well as `ready-to-merge` labels stuck on PRs that fell off the queue, and also allows us to add and manage 2 new labels:
- `bors-staging`: PRs that are in the currently building batch will get this label
- `awaiting-requeue`: PRs that were on the bors queue but now require a requeue due to something going wrong will get this label
Changes in this PR:
- bors.toml: add a `[labels]` table mapping all four lifecycle concerns to mathlib4's label names: `on_queue` -> `ready-to-merge`, `building` -> `bors-staging`, `failed` -> `awaiting-requeue`, `delegated` -> `delegated`. (`bors-staging` and `awaiting-requeue` are new labels for this repo.)
- maintainer_bors.yml / maintainer_bors_wf_run.yml: strip the `ready-to-merge`/`delegated` add/remove logic (and the `Build failed:` -> `delegated` re-apply quirk and the `bors r-`/`d-` removal path) now that bors owns those labels. The workflows keep their other jobs: detecting merge/delegate commands, removing `awaiting-author` / `maintainer-merge`, and updating Zulip emoji reactions. Renamed to "Bors merge/delegate follow-up" to match, keeping the workflow_run linkage consistent.
- docs/workflows.md: update the two workflow descriptions.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com> |
CI
LLM-generated
maintainer-merge
|
34/64 |
.github/workflows/maintainer_bors.yml,.github/workflows/maintainer_bors_wf_run.yml,bors.toml,docs/workflows.md |
4 |
14 |
['bryangingechen', 'github-actions', 'grunweg', 'mathlib-bors'] |
nobody |
0-46888 13 hours ago |
0-46957 12 hours ago |
4-17843 4 days |
| 37930 |
vlad902 author:vlad902 |
chore(SimpleGraph): move `cycleGraph` to its own file |
PR #34797 re-defined `cycleGraph` independent of `circulantGraph`. Now move the definition of `cycleGraph` to its own file so that the definition can be used without importing the algebra hierarchy.
---
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|
t-combinatorics
maintainer-merge
|
171/146 |
Mathlib.lean,Mathlib/Combinatorics/SimpleGraph/Circulant.lean,Mathlib/Combinatorics/SimpleGraph/CycleGraph.lean |
3 |
6 |
['YaelDillies', 'github-actions', 'mathlib-merge-conflicts', 'vlad902'] |
nobody |
0-40348 11 hours ago |
0-40410 11 hours ago |
52-81238 52 days |
| 40745 |
teorth author:teorth |
feat(Data/Set/Basic,Data/Finset/Empty): forall_mem_const for nonempty s |
Add variants of the `forall_const` `@simp` lemma that localize to a `Nonempty` `Set` or `Finset`. Here we use the instance form of `Nonempty` (in contrast to the existing `Finset.Nonempty.forall_const`) in order to make `simp` work painlessly.
---
Update: as per reviewer request, ~~the `@simp` tags have been dropped and~~ a further `Set.Nonempty.forall_const` lemma has been added.
[](https://gitpod.io/from-referrer/)
|
t-data
new-contributor
maintainer-merge
|
12/0 |
Mathlib/Data/Finset/Empty.lean,Mathlib/Data/Set/Basic.lean |
2 |
14 |
['github-actions', 'leanprover-radar', 'teorth', 'themathqueen'] |
nobody |
0-36494 10 hours ago |
1-945 1 day ago |
4-23850 4 days |
| 40884 |
joelriou author:joelriou |
feat(CategoryTheory/Localization): small additions |
This PR adds a few properties about localization with respect to isomorphisms.
The lemma `LocalizerMorphism.Derives.isIso` is renamed `isIso_of_isRightDerivedFunctor`, because we shall need the dual lemma in the future.
---
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[](https://gitpod.io/from-referrer/)
|
t-category-theory
maintainer-merge
|
16/3 |
Mathlib/CategoryTheory/Localization/DerivabilityStructure/Derives.lean,Mathlib/CategoryTheory/Localization/LocalizerMorphism.lean,Mathlib/CategoryTheory/Localization/Predicate.lean,Mathlib/CategoryTheory/MorphismProperty/IsInvertedBy.lean |
4 |
5 |
['chrisflav', 'github-actions', 'smorel394'] |
nobody |
0-33424 9 hours ago |
0-33482 9 hours ago |
0-41151 11 hours |
| 40449 |
Yu-Misaka author:Yu-Misaka |
feat(LinearAlgebra): preliminary APIs for symplectic matrices |
Greetings! This PR attempts to provide some basic APIs for #40352. Involving `Matrix.mulVec_apply`, `Matrix.map_J` and `SymplecticGroup.map_mem`.
Honestly I'm not sure if, for example, `Matrix.mulVec_apply` exists somewhere else in the library (I tried my best but didn't find it)
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[](https://gitpod.io/from-referrer/)
|
t-algebra
maintainer-merge
label:t-algebra$ |
22/0 |
Mathlib/Data/Matrix/Mul.lean,Mathlib/LinearAlgebra/SymplecticGroup.lean |
2 |
33 |
['Yu-Misaka', 'eric-wieser', 'github-actions', 'themathqueen', 'wwylele'] |
nobody |
0-26734 7 hours ago |
0-40861 11 hours ago |
11-70812 11 days |
| 39122 |
justus-springer author:justus-springer |
feat(AlgebraicGeometry/Birational): Birationality and rationality of schemes |
This is a first step (of hopefully many) towards some basic birational geometry. This PR adds `Birational/Birational.lean`, which defines predicates `Birational`, `BirationalOver` and `IsRationalOver` for arbitrary schemes and provides basic API (e.g. that they are equivalence relations, and that affine space is rational).
Some notes on the choice of definitions: There are multiple ways to define what it means for
two schemes to be birational to each other. A common one is: "There exists a
rational map with a rational inverse". However, this would require defining composition of
rational maps, which is not always defined (In order to compose `f : X ⤏ Y` with `g : Y ⤏ Z`, you
need at least `X` preirreducible, `Y` nonempty and `f` dominant). On the other hand, I can define
"There exist dense subsets `U : Opens X` and `V : Opens Y` such that `U ≅ V` as schemes" for
any two schemes `X` and `Y`, with no conditions. Hence I chose that as a definition. I'm also
working on defining composition of rational maps (#39445), and once that's done, there should be a theorem
connecting the two definitions.
- [x] depends on: #39316
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[](https://gitpod.io/from-referrer/)
|
t-algebraic-geometry
maintainer-merge
|
295/0 |
Mathlib.lean,Mathlib/AlgebraicGeometry/Birational/Birational.lean,Mathlib/AlgebraicGeometry/Restrict.lean |
3 |
33 |
['chrisflav', 'erdOne', 'github-actions', 'joelriou', 'justus-springer', 'mathlib-dependent-issues', 'mathlib-merge-conflicts'] |
chrisflav and joelriou assignee:joelriou assignee:chrisflav |
0-24421 6 hours ago |
0-35770 9 hours ago |
38-68931 38 days |
| 37870 |
Jun2M author:Jun2M |
feat(Combinatorics/Graph): `Simple` typeclass for `Graph` |
This PR introduces two type classes on `Graph`: `Loopless` and `Simple`.
---
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[](https://gitpod.io/from-referrer/)
|
t-combinatorics
maintainer-merge
|
92/0 |
Mathlib.lean,Mathlib/Combinatorics/Graph/Simple.lean |
2 |
6 |
['YaelDillies', 'github-actions', 'madvorak', 'mathlib-merge-conflicts'] |
nobody |
0-18026 5 hours ago |
26-9189 26 days ago |
72-11852 72 days |
| 40854 |
teorth author:teorth |
chore(NumberTheory/PrimeCounting): minor golf |
Inspired by [this comment](https://github.com/leanprover-community/mathlib4/pull/40654#issuecomment-4753093121) to #40654, I have done a golfing pass on` PrimeCounting.lean`, shortening some proofs to a single term and saving about 30 lines of code (largely through whitespace reduction). *However*, some of these golfs rely on defeq abuse, for instance using the fact that `Ioo 0 n` and `Ico 1 n` are definitionally equivalent. I would appreciate some feedback as to whether such abuse is tolerated on Mathlib. I'm happy to drop this PR if this is not the case.
---
[](https://gitpod.io/from-referrer/)
|
t-number-theory
new-contributor
maintainer-merge
|
87/127 |
Mathlib/NumberTheory/PrimeCounting.lean |
1 |
14 |
['MichaelStollBayreuth', 'github-actions', 'leanprover-radar', 'riccardobrasca', 'teorth'] |
MichaelStollBayreuth assignee:MichaelStollBayreuth |
0-17741 4 hours ago |
0-22128 5 hours ago |
1-82844 1 day |
| 38943 |
felixpernegger author:felixpernegger |
feat(Topology/CWComplex/Classical): discrete spaces are CW complexes |
as well as some useful lemmas
This is partly based on code by @scholzhannah
I think this is notable to include, since it is pretty much the only (easy) "topological" sufficient condition for something being a CW complex there is.
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|
t-topology
maintainer-merge
|
89/2 |
Mathlib/Algebra/Group/Fin/Tuple.lean,Mathlib/Topology/CWComplex/Classical/Basic.lean,Mathlib/Topology/DiscreteSubset.lean |
3 |
39 |
['felixpernegger', 'github-actions', 'grunweg', 'mathlib-merge-conflicts', 'scholzhannah'] |
urkud assignee:urkud |
0-16195 4 hours ago |
0-16254 4 hours ago |
42-54284 42 days |
| Number |
Author |
Title |
Description |
Labels |
+/- |
Modified files (first 100) |
📝 |
💬 |
All users who commented or reviewed |
Assignee(s) |
Updated |
Last status change |
total time in review |
| 17623 |
FR-vdash-bot author:FR-vdash-bot |
feat(Algebra/Order/GroupWithZero/Unbundled): add some lemmas |
Some lemmas in `Algebra.Order.GroupWithZero.Unbundled` have incorrect or unsatisfactory names, or assumptions that can be omitted using `ZeroLEOneClass`. The lemmas added in this PR are versions of existing lemmas that use the correct or better name or `ZeroLEOneClass` to omit an assumption. The original lemmas will be deprecated in #17593.
| New name | Old name |
|-------------------------|-------------------------|
| `mul_le_one_left₀` | `Left.mul_le_one_of_le_of_le` |
| `mul_lt_one_of_le_of_lt_left₀` (`0 ≤ ·` version) / `mul_lt_one_of_le_of_lt_of_pos_left` | `Left.mul_lt_of_le_of_lt_one_of_pos` |
| `mul_lt_one_of_lt_of_le_left₀` | `Left.mul_lt_of_lt_of_le_one_of_nonneg` |
| `mul_le_one_right₀` | `Right.mul_le_one_of_le_of_le` |
| `mul_lt_one_of_lt_of_le_right₀` (`0 ≤ ·` version) / `mul_lt_one_of_lt_of_le_of_pos_right` | `Right.mul_lt_one_of_lt_of_le_of_pos` |
| `mul_lt_one_of_le_of_lt_right₀` | `Right.mul_lt_one_of_le_of_lt_of_nonneg` |
The following lemmas use `ZeroLEOneClass`.
| New name | Old name |
|-------------------------|-------------------------|
| `(Left.)one_le_mul₀` | `Left.one_le_mul_of_le_of_le` |
| `Left.one_lt_mul_of_le_of_lt₀` | `Left.one_lt_mul_of_le_of_lt_of_pos` |
| `Left.one_lt_mul_of_lt_of_le₀` | `Left.lt_mul_of_lt_of_one_le_of_nonneg` / `one_lt_mul_of_lt_of_le` (still there) |
| `(Left.)one_lt_mul₀` | |
| `Right.one_le_mul₀` | `Right.one_le_mul_of_le_of_le` |
| `Right.one_lt_mul_of_lt_of_le₀` | `Right.one_lt_mul_of_lt_of_le_of_pos` |
| `Right.one_lt_mul_of_le_of_lt₀` | `Right.one_lt_mul_of_le_of_lt_of_nonneg` / `one_lt_mul_of_le_of_lt` (still there) / `one_lt_mul` (still there) |
| `Right.one_lt_mul₀` | `Right.one_lt_mul_of_lt_of_lt` |
---
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Split from #17593.
[](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 |
579-32352 1 year ago |
unknown |
unknown |
| 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
---
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- [ ] depends on: #15651
- [ ] depends on: #15649
[](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 |
412-82029 1 year ago |
unknown |
unknown |
| 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.
---
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[](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 |
352-62378 11 months ago |
unknown |
unknown |
| 25218 |
kckennylau author:kckennylau |
feat(AlgebraicGeometry): Tate normal form of elliptic curves |
---
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[](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 |
352-61216 11 months ago |
unknown |
unknown |
| 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 |
292-76861 9 months ago |
301-28015 301 days ago |
0-19244 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!
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|
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 |
249-54071 8 months ago |
unknown |
unknown |
| 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`
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[](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 |
221-64945 7 months ago |
261-43611 261 days ago |
0-29227 8 hours |
| 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
---
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|
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 |
216-82077 7 months ago |
unknown |
unknown |
| 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
---
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[](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 |
216-11918 7 months ago |
unknown |
unknown |
| 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.
---
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- [x] depends on: #20644
- [x] depends on: #20645
[](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 |
215-49086 7 months ago |
unknown |
unknown |
| 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.
---
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|
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 |
215-20952 7 months ago |
unknown |
unknown |
| 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.
---
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It's not a typical design to use these auxiliary typeclasses and term elaborators, but I haven't found a better way to support these notations.
Some of the naming may need to be discussed. For example:
- `⟦·⟧` is currently called `mkQ` in names. This distinguishes it from other `.mk`s and makes it possible to write the quotient map as `mkQ` `mkQ'` ~~`mkQ_ h`~~. But this will also require changing the old lemma names.
- It would be helpful if the names of new type classes explained their functionality better.
[Zulip](https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/migrate.20to.20.60QuotLike.60.20API)
This PR continues the work from #16421.
Original PR: https://github.com/leanprover-community/mathlib4/pull/16421 |
RFC
t-data
awaiting-zulip
awaiting-author
|
629/0 |
Mathlib.lean,Mathlib/Data/QuotType.lean,MathlibTest/QuotType.lean |
3 |
22 |
['SnirBroshi', 'YaelDillies', 'astrainfinita', 'dagurtomas', 'github-actions', 'mathlib4-merge-conflict-bot', 'plp127', 'vihdzp'] |
nobody |
194-2798 6 months ago |
unknown |
unknown |
| 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.
---
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[](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 |
166-57511 5 months ago |
167-17844 167 days ago |
5-72484 5 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)
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|
t-combinatorics
new-contributor
awaiting-zulip
awaiting-author
|
531/0 |
Mathlib.lean,Mathlib/Combinatorics/Enumerative/Partition/EulerComb.lean |
2 |
7 |
['chiyunhsu', 'dagurtomas', 'github-actions', 'tb65536', 'vihdzp'] |
b-mehta assignee:b-mehta |
144-24764 4 months ago |
144-24764 144 days ago |
42-20793 42 days |
| 32742 |
LTolDe author:LTolDe |
feat(MeasureTheory/Constructions/Polish/Basic): add class SuslinSpace |
add new class `SuslinSpace` for a topological space that is an analytic set in itself
This will be useful to prove the **Effros Theorem**, see [zulip thread](https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/Effros.20Theorem/with/558712441).
---
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|
new-contributor
awaiting-zulip
t-measure-probability
awaiting-author
|
4/0 |
Mathlib/MeasureTheory/Constructions/Polish/Basic.lean |
1 |
10 |
['ADedecker', 'LTolDe', 'dagurtomas', 'dupuisf', 'github-actions', 'jcommelin'] |
PatrickMassot assignee:PatrickMassot |
141-37174 4 months ago |
167-21306 167 days ago |
11-7478 11 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!
---
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[](https://gitpod.io/from-referrer/)
|
t-linter
awaiting-zulip
awaiting-author
|
55/7 |
Mathlib/Tactic/Linter/Whitespace.lean |
1 |
20 |
['adomani', 'eric-wieser', 'github-actions', 'grunweg', 'joneugster', 'kim-em', 'leanprover-bot', 'leanprover-radar', 'mathlib-bors', 'mathlib4-merge-conflict-bot'] |
grunweg assignee:grunweg |
124-47948 4 months ago |
297-44266 297 days ago |
51-56273 51 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.
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|
t-linter
awaiting-zulip
merge-conflict
|
23/2 |
Mathlib/Tactic/Linter/TextBased.lean |
1 |
5 |
['github-actions', 'grunweg', 'joneugster', 'mathlib-merge-conflicts', 'vihdzp'] |
nobody |
122-18567 4 months ago |
unknown |
unknown |
| 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)
---
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[](https://gitpod.io/from-referrer/)
|
t-data
awaiting-zulip
merge-conflict
|
10/10 |
Mathlib/Control/Monad/Cont.lean,Mathlib/Control/Monad/Writer.lean |
2 |
5 |
['Shreyas4991', 'eric-wieser', 'github-actions', 'mathlib-merge-conflicts'] |
nobody |
121-83481 4 months ago |
unknown |
unknown |
| 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.
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|
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 |
116-42320 3 months ago |
unknown |
unknown |
| 22361 |
rudynicolop author:rudynicolop |
feat(Computability/NFA): nfa closure properties |
Add the closure properties union, intersection and reversal for NFA.
---
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|
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 |
116-42304 3 months ago |
unknown |
unknown |
| 23929 |
meithecatte author:meithecatte |
feat(Computability/NFA): improve bound on pumping lemma |
---
<!-- The text above the `---` will become the commit message when your
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- [x] depends on: #25321
[](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 |
115-62333 3 months ago |
380-5232 380 days ago |
0-37135 10 hours |
| 34963 |
Parcly-Taxel author:Parcly-Taxel |
feat(Archive): proof of the Robbins conjecture |
Cf. [#mathlib4 > Alternative axiomatization of boolean algebras @ 💬](https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/Alternative.20axiomatization.20of.20boolean.20algebras/near/558900960) and #31924. |
t-algebra
awaiting-zulip
label:t-algebra$ |
610/0 |
Archive.lean,Archive/Robbins.lean |
2 |
2 |
['chrisflav', 'github-actions'] |
chrisflav assignee:chrisflav |
114-14374 3 months ago |
63-14349 63 days ago |
71-51176 71 days |
| 30750 |
SnirBroshi author:SnirBroshi |
feat(Data/Quot): `toSet` and `equivClassOf` |
Define `toSet` which gets the set corresponding to an element of a quotient, and `equivClassOf` which gets the equivalence class of an element under a quotient.
---
I found these definitions helpful when working with quotients, specifically `ConnectedComponents` of a `TopologicalSpace`.
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|
t-data
awaiting-author
awaiting-zulip
|
162/0 |
Mathlib/Data/Quot.lean,Mathlib/Data/Set/Image.lean,Mathlib/Data/SetLike/Basic.lean,Mathlib/Data/Setoid/Basic.lean |
4 |
8 |
['SnirBroshi', 'TwoFX', 'eric-wieser', 'github-actions', 'linesthatinterlace', 'mathlib-merge-conflicts'] |
TwoFX assignee:TwoFX |
111-44534 3 months ago |
207-47874 207 days ago |
35-80039 35 days |
| 36890 |
vihdzp author:vihdzp |
chore(SetTheory): `le_mul_left` → `le_mul_of_pos_left` |
The new theorem names/statements match [`Nat.le_mul_of_pos_left`](https://leanprover-community.github.io/mathlib4_docs/Init/Data/Nat/Lemmas.html#Nat.le_mul_of_pos_left). The cardinal one has also been moved to an earlier file.
---
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|
t-set-theory
awaiting-zulip
merge-conflict
|
28/23 |
Mathlib/SetTheory/Cardinal/Arithmetic.lean,Mathlib/SetTheory/Cardinal/Basic.lean,Mathlib/SetTheory/Cardinal/Free.lean,Mathlib/SetTheory/Ordinal/Arithmetic.lean,Mathlib/SetTheory/Ordinal/Exponential.lean,Mathlib/SetTheory/Ordinal/Notation.lean |
6 |
2 |
['github-actions', 'mathlib-merge-conflicts'] |
nobody |
91-52489 2 months ago |
94-39229 94 days ago |
0-10819 3 hours |
| 39026 |
fpvandoorn author:fpvandoorn |
feat: add assume tactic |
Teaching tactic: `assume p, q, r` is short for `intro (_ : p) (_ : q) (_ : r)`.
---
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[Zulip thread](https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/Assume.20tactic/with/593477478)
[](https://gitpod.io/from-referrer/)
|
awaiting-zulip
t-meta
awaiting-author
|
123/0 |
Mathlib.lean,Mathlib/Tactic.lean,Mathlib/Tactic/Assume.lean,MathlibTest/Assume.lean |
4 |
9 |
['fpvandoorn', 'github-actions', 'joneugster'] |
joneugster assignee:joneugster |
24-38772 24 days ago |
unknown |
unknown |
| 37346 |
euprunin author:euprunin |
chore: golf using `grind` |
The goal of this PR is to decrease the number of times lemmas are called explicitly. Any decrease in compilation time is a welcome side effect, although it is not a primary objective.
Trace profiling results (differences <30 ms considered measurement noise):
* `✅️ SimpleGraph.Walk.IsPath.getVert_injOn`: unchanged 🎉
* `✅️ SimpleGraph.Walk.length_bypass_le`: unchanged 🎉
* `✅️ Rat.floor_intCast_div_natCast`: unchanged 🎉
* `✅️ InnerProductGeometry.norm_eq_of_angle_sub_eq_angle_sub_rev_of_angle_ne_pi`: unchanged 🎉
* `✅️ padicNorm.zero_of_padicNorm_eq_zero`: unchanged 🎉
Profiled using `set_option trace.profiler true in`.
---
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|
maintainer-merge
awaiting-zulip
merge-conflict
|
7/45 |
Mathlib/Combinatorics/SimpleGraph/Paths.lean,Mathlib/Data/Rat/Floor.lean,Mathlib/Geometry/Euclidean/Triangle.lean,Mathlib/NumberTheory/Padics/PadicNorm.lean |
4 |
23 |
['FernandoChu', 'bryangingechen', 'chenson2018', 'euprunin', 'faenuccio', 'github-actions', 'grunweg', 'mathlib-merge-conflicts'] |
nobody |
17-75564 17 days ago |
54-33293 54 days ago |
30-45859 30 days |
| 38546 |
yhx-12243 author:yhx-12243 |
fix(Algebra/Module/Injective): changing the universe from the module's to the ring's |
Change the definition of
```lean
class Module.Injective : Prop where
out : ∀ ⦃X Y : Type v⦄ [AddCommGroup X] [AddCommGroup Y] [Module R X] [Module R Y]
(f : X →ₗ[R] Y) (_ : Function.Injective f) (g : X →ₗ[R] Q),
∃ h : Y →ₗ[R] Q, ∀ x, h (f x) = g x
```
into
```lean
class Module.Injective : Prop where
out : ∀ ⦃X Y : Type u⦄ [AddCommGroup X] [AddCommGroup Y] [Module R X] [Module R Y]
(f : X →ₗ[R] Y) (_ : Function.Injective f) (g : X →ₗ[R] Q),
∃ h : Y →ₗ[R] Q, ∀ x, h (f x) = g x
```
where `u` is the universe of ring, `v` is the universe of module,
to make it agree with `Module.Baer` and real mathematical definition, **without universe issues** (make the theorem [`Module.Baer.of_injective`](https://leanprover-community.github.io/mathlib4_docs/Mathlib/Algebra/Module/Injective.html#Module.Baer.of_injective) not require `Small.{v, u} R` issue).
This type of adaption also appeared in the criterion `Module.Flat`, which also uses `Type u` on testing modules.
See discussions in https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/Universe.20issue.20about.20injective.20module .
---
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|
t-algebra
new-contributor
awaiting-zulip
awaiting-author
label:t-algebra$ |
57/43 |
Mathlib/Algebra/Category/ModuleCat/Injective.lean,Mathlib/Algebra/Category/ModuleCat/Ulift.lean,Mathlib/Algebra/Module/Injective.lean,Mathlib/RepresentationTheory/FinGroupCharZero.lean,Mathlib/RingTheory/Flat/Tensor.lean,Mathlib/RingTheory/LocalProperties/Injective.lean |
6 |
10 |
['eric-wieser', 'github-actions', 'grunweg', 'mathlib-bors', 'wwylele', 'yhx-12243'] |
nobody |
13-45782 13 days ago |
57-1049 57 days ago |
0-24433 6 hours |
| 40061 |
gasparattila author:gasparattila |
chore(MeasureTheory/SetSemiring): deprecate `disjointOfUnion` |
This definition was only used in the proof of `AddContent.addContent_sUnion_le_sum`. Since it is defined using choice with very specific properties, it is unlikely to be reusable elsewhere.
---
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[](https://gitpod.io/from-referrer/)
|
t-measure-probability
awaiting-zulip
|
10/0 |
Mathlib/MeasureTheory/SetSemiring.lean |
1 |
5 |
['RemyDegenne', 'WojciechCzernous', 'gasparattila', 'github-actions', 'mathlib-dependent-issues'] |
EtienneC30 assignee:EtienneC30 |
11-6247 11 days ago |
20-32624 20 days ago |
1-8910 1 day |
| 39233 |
wrenna-robson author:wrenna-robson |
feat: `Pi.map` rename to `Function.map` |
This PR renames `Pi.map` to `Function.map` and makes the changes necessary to support this. In particular this means that Mathlib.Logic.Function.Defs now only contains the Function namespace.
A future PR may update the names of *.piMap in line with this.
Zulip thread: [#PR reviews > #39233 - rename Pi.map to Function.map @ 💬](https://leanprover.zulipchat.com/#narrow/channel/144837-PR-reviews/topic/.2339233.20-.20rename.20Pi.2Emap.20to.20Function.2Emap/near/594605689)
General discussion regarding the Pi namespace: https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/The.20Pi.20namespace/near/594782721
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|
awaiting-zulip |
130/121 |
Mathlib/Algebra/Category/Grp/AB.lean,Mathlib/Algebra/Notation/Pi/Defs.lean,Mathlib/Algebra/Order/Antidiag/Nat.lean,Mathlib/Algebra/Regular/Pi.lean,Mathlib/Analysis/InnerProductSpace/Coalgebra.lean,Mathlib/Analysis/SpecialFunctions/PolarCoord.lean,Mathlib/Condensed/Discrete/LocallyConstant.lean,Mathlib/Control/Bifunctor.lean,Mathlib/Data/Finset/Powerset.lean,Mathlib/Data/Prod/Basic.lean,Mathlib/Data/Set/Prod.lean,Mathlib/Dynamics/Ergodic/MeasurePreserving.lean,Mathlib/Dynamics/PeriodicPts/Defs.lean,Mathlib/Dynamics/PeriodicPts/Lemmas.lean,Mathlib/Dynamics/TopologicalEntropy/Semiconj.lean,Mathlib/FieldTheory/Perfect.lean,Mathlib/Geometry/Manifold/IsManifold/Basic.lean,Mathlib/Geometry/Manifold/IsManifold/ExtChartAt.lean,Mathlib/GroupTheory/MonoidLocalization/Lemmas.lean,Mathlib/LinearAlgebra/Multilinear/Basis.lean,Mathlib/LinearAlgebra/Pi.lean,Mathlib/Logic/Equiv/Basic.lean,Mathlib/Logic/Equiv/PartialEquiv.lean,Mathlib/Logic/Function/Basic.lean,Mathlib/Logic/Function/Defs.lean,Mathlib/Logic/Function/Iterate.lean,Mathlib/Order/Filter/Cofinite.lean,Mathlib/Order/Filter/Pi.lean,Mathlib/RingTheory/Coalgebra/Basic.lean,Mathlib/Topology/Algebra/FilterBasis.lean,Mathlib/Topology/Algebra/Module/ContinuousLinearMap/PiProd.lean,Mathlib/Topology/Algebra/RestrictedProduct/TopologicalSpace.lean,Mathlib/Topology/Constructions.lean,Mathlib/Topology/Maps/Basic.lean,Mathlib/Topology/MetricSpace/HausdorffAlexandroff.lean,Mathlib/Topology/MetricSpace/Isometry.lean,Mathlib/Topology/NhdsWithin.lean |
37 |
5 |
['github-actions', 'linesthatinterlace', 'mathlib-merge-conflicts', 'themathqueen'] |
nobody |
5-45778 5 days ago |
41-20385 41 days ago |
0-701 11 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
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|
new-contributor
awaiting-zulip
t-algebra
WIP
merge-conflict
label:t-algebra$ |
300/2 |
Mathlib.lean,Mathlib/LinearAlgebra/PiTensorProduct.lean,Mathlib/LinearAlgebra/PiTensorProduct/Set.lean |
3 |
32 |
['PrParadoxy', 'dagurtomas', 'eric-wieser', 'github-actions', 'goliath-klein', 'leanprover-radar', 'mathlib-merge-conflicts', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] |
nobody |
2-84963 2 days ago |
182-14271 182 days ago |
10-64694 10 days |
| 39311 |
felixpernegger author:felixpernegger |
refactor: redefine `eLpNorm` at `p = 0` |
For Zulip discussion see https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/eLpNorm.20junk.20value/with/576356442. In partuclar this change is suggestion 2 in [#mathlib4 > eLpNorm junk value @ 💬](https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/eLpNorm.20junk.20value/near/576340531)
This redefined [MeasureTheory.eLpNorm](https://leanprover-community.github.io/mathlib4_docs/Mathlib/MeasureTheory/Function/LpSeminorm/Defs.html#MeasureTheory.eLpNorm) at `p = 0`. Previously it was always `0` but now it is the measure of the support of the function (technical detail: In order to avoid having to add additional arguments to `eLpNorm`, we define it as the measure of the support of the norm of the function, but this is almost always the same)
The motivation for this comes from the counting measure, in particular this then unifies with https://leanprover-community.github.io/mathlib4_docs/Mathlib/Analysis/Normed/Lp/lpSpace.html#Mem%E2%84%93p. In any case, it is "closer" to the actual mathematical definition
Unfortunately, since `eLpNorm` is widely used, the diff is very large and a lot of theorems break (i.e. now require `p != 0`). Oftentimes `p != 0` is still not required (sometimes with nontrivial arguments), I tried to avoid adding extra hypothesis whenever I could but I almost certainly missed some.
There now may also be places where we dont need `p != 0` as a hypothesis anymore (i.e. for `[Memℓp](https://leanprover-community.github.io/mathlib4_docs/Mathlib/Analysis/Normed/Lp/lpSpace.html#Mem%E2%84%93p)`), but this is not included in this PR.
---
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awaiting-zulip
merge-conflict
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950/595 |
Mathlib/Analysis/Distribution/ContDiffMapSupportedIn.lean,Mathlib/Analysis/Distribution/SchwartzSpace/Basic.lean,Mathlib/Analysis/Distribution/TemperateGrowth.lean,Mathlib/Analysis/Distribution/TemperedDistribution.lean,Mathlib/Analysis/Distribution/TestFunction.lean,Mathlib/Analysis/Fourier/LpSpace.lean,Mathlib/Analysis/FunctionalSpaces/SobolevInequality.lean,Mathlib/Analysis/Normed/Lp/SmoothApprox.lean,Mathlib/Data/ENNReal/Holder.lean,Mathlib/MeasureTheory/Function/ContinuousMapDense.lean,Mathlib/MeasureTheory/Function/ConvergenceInMeasure.lean,Mathlib/MeasureTheory/Function/Holder.lean,Mathlib/MeasureTheory/Function/L1Space/Integrable.lean,Mathlib/MeasureTheory/Function/L2Space.lean,Mathlib/MeasureTheory/Function/LpSeminorm/Basic.lean,Mathlib/MeasureTheory/Function/LpSeminorm/CompareExp.lean,Mathlib/MeasureTheory/Function/LpSeminorm/Defs.lean,Mathlib/MeasureTheory/Function/LpSeminorm/Indicator.lean,Mathlib/MeasureTheory/Function/LpSeminorm/LpNorm.lean,Mathlib/MeasureTheory/Function/LpSeminorm/Monotonicity.lean,Mathlib/MeasureTheory/Function/LpSeminorm/SMul.lean,Mathlib/MeasureTheory/Function/LpSeminorm/TriangleInequality.lean,Mathlib/MeasureTheory/Function/LpSeminorm/Trim.lean,Mathlib/MeasureTheory/Function/LpSpace/Basic.lean,Mathlib/MeasureTheory/Function/LpSpace/Complete.lean,Mathlib/MeasureTheory/Function/LpSpace/CompleteOfCompleteLp.lean,Mathlib/MeasureTheory/Function/LpSpace/ContinuousFunctions.lean,Mathlib/MeasureTheory/Function/LpSpace/Indicator.lean,Mathlib/MeasureTheory/Function/SimpleFuncDenseLp.lean,Mathlib/MeasureTheory/Function/UniformIntegrable.lean,Mathlib/MeasureTheory/Integral/SetToL1.lean,Mathlib/Probability/CentralLimitTheorem.lean,Mathlib/Probability/Distributions/Gaussian/Basic.lean,Mathlib/Probability/Distributions/Gaussian/Fernique.lean,Mathlib/Probability/Distributions/Gaussian/HasGaussianLaw/Basic.lean,Mathlib/Probability/Distributions/Gaussian/Real.lean,Mathlib/Probability/IdentDistrib.lean,Mathlib/Probability/Kernel/Disintegration/CDFToKernel.lean,Mathlib/Probability/Kernel/Disintegration/Density.lean,Mathlib/Probability/Martingale/Convergence.lean,Mathlib/Probability/Moments/CovarianceBilinDual.lean,Mathlib/Probability/Moments/IntegrableExpMul.lean,Mathlib/Probability/Moments/SubGaussian.lean,Mathlib/Probability/Process/Filtration.lean,MathlibTest/congr.lean |
45 |
41 |
['felixpernegger', 'github-actions', 'mathlib-merge-conflicts', 'sgouezel'] |
nobody |
2-81287 2 days ago |
17-29524 17 days ago |
5-63685 5 days |