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 |
Labels |
+/- |
Modified files (first 100) |
📝 |
💬 |
All users who commented or reviewed |
Assignee(s) |
Updated |
Last status change |
total time in review |
blocks |
| 33077 |
YaelDillies author:YaelDillies |
feat(Basic/Rel): balls |
Define `SetRel.ball` and use it in place of `UniformSpace.ball`.
---
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|
t-data
maintainer-merge
|
392/299 |
Mathlib/Basic/Rel.lean,Mathlib/Basic/Rel/Cover.lean,Mathlib/Dynamics/TopologicalEntropy/CoverEntropy.lean,Mathlib/Dynamics/TopologicalEntropy/DynamicalEntourage.lean,Mathlib/Dynamics/TopologicalEntropy/NetEntropy.lean,Mathlib/Dynamics/TopologicalEntropy/Semiconj.lean,Mathlib/Dynamics/TopologicalEntropy/Subset.lean,Mathlib/MeasureTheory/Measure/LevyProkhorovMetric.lean,Mathlib/MeasureTheory/Measure/RegularityCompacts.lean,Mathlib/RingTheory/LaurentSeries.lean,Mathlib/Topology/Algebra/Module/LocallyConvex.lean,Mathlib/Topology/EMetricSpace/Basic.lean,Mathlib/Topology/MetricSpace/Pseudo/Defs.lean,Mathlib/Topology/MetricSpace/Pseudo/Lemmas.lean,Mathlib/Topology/Metrizable/Basic.lean,Mathlib/Topology/Semicontinuity/Hemicontinuity.lean,Mathlib/Topology/Sequences.lean,Mathlib/Topology/UniformSpace/Basic.lean,Mathlib/Topology/UniformSpace/Cauchy.lean,Mathlib/Topology/UniformSpace/Closeds.lean,Mathlib/Topology/UniformSpace/Compact.lean,Mathlib/Topology/UniformSpace/CompactConvergence.lean,Mathlib/Topology/UniformSpace/Defs.lean,Mathlib/Topology/UniformSpace/Equicontinuity.lean,Mathlib/Topology/UniformSpace/HeineCantor.lean,Mathlib/Topology/UniformSpace/Separation.lean,Mathlib/Topology/UniformSpace/Ultra/Basic.lean,Mathlib/Topology/UniformSpace/UniformConvergenceTopology.lean,Mathlib/Topology/UniformSpace/UniformEmbedding.lean,Mathlib/Topology/UniformSpace/Uniformizable.lean |
30 |
7 |
['SnirBroshi', 'YaelDillies', 'github-actions', 'joneugster', 'mathlib-merge-conflicts'] |
nobody |
20-40991 20 days ago |
26-36924 26 days ago |
33-62180 33 days |
0 |
| 41484 |
FernandoChu author:FernandoChu |
feat(CategoryTheory): kan extensions from isos |
This PR constructs lifts out of isomorphisms of 1-cells, and shows that being (abs) Kan is preserved by this. This is done for all four notions of left/right lifts/extensions.
This is needed for the oo-cosmos project.
----
**AI disclosure**. Claude was used in defining the API for the left extension case. After manually fixing its bad proofs/definitions/docstrings, Claude was later asked to replicate this for the other three cases, which I again finetuned. |
t-category-theory
LLM-generated
large-import
maintainer-merge
tech debt
|
413/79 |
Mathlib/CategoryTheory/Bicategory/Extension.lean,Mathlib/CategoryTheory/Bicategory/Kan/IsKan.lean |
2 |
24 |
['FernandoChu', 'github-actions', 'grunweg', 'robin-carlier'] |
nobody |
18-76975 18 days ago |
40-34771 40 days ago |
92-41025 92 days |
1 |
| 38534 |
AlexeyMilovanov author:AlexeyMilovanov |
refactor(Computability): make `PFun` a one-field structure |
This PR refactors `PFun` from `def PFun α β := α → Part β` to a structure with a `FunLike` instance.
[Discussion](https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/Fix.20for.20fun_prop.20on.20PFun.20.28context.3A.20Computability.20Theory.29)
### Main changes
- Redefine `PFun` as a structure with one field, `toFun : α → Part β`.
- Add the `FunLike (α →. β) α (Part β)` instance and configure `simps` projections.
- Add the projection and application simp lemmas required by the structure wrapper.
- Add `fun x ↦. ...` notation for partial-function literals.
- Adapt downstream equality proofs to use `PFun.ext` or `DFunLike.ext` where
`funext` no longer applies directly.
- Remove 33 local `backward.isDefEq.respectTransparency false` workarounds that
are no longer needed after the refactor.
### Downstream impact
The refactor mainly impacts Computability Theory and Category Theory (`Category/PartialFun.lean`). Since `PFun` is no longer definitionally equal to `α → Part β`, tactics such as `rfl`, `simp`, and `funext` can no longer always see through the old raw-function representation.
### Note on LLM usage
The core `PFun` change caused numerous downstream errors. I initially used an LLM to help draft fixes for these files. Afterwards, I spent a significant amount of time manually correcting and modifying all of the generated changes. |
new-contributor
t-computability
tech debt
LLM-generated
maintainer-merge
merge-conflict
|
599/544 |
Mathlib/CategoryTheory/Category/PartialFun.lean,Mathlib/Computability/Ackermann.lean,Mathlib/Computability/Partrec.lean,Mathlib/Computability/PartrecBasis.lean,Mathlib/Computability/PartrecCode.lean,Mathlib/Computability/RE.lean,Mathlib/Computability/RecursiveIn.lean,Mathlib/Computability/StateTransition.lean,Mathlib/Computability/TuringDegree.lean,Mathlib/Computability/TuringMachine/Config.lean,Mathlib/Data/Finset/PImage.lean,Mathlib/Data/PFun.lean,Mathlib/NumberTheory/Dioph.lean |
13 |
79 |
['AlexeyMilovanov', 'JovanGerb', 'YaelDillies', 'dagurtomas', 'github-actions', 'j-loreaux', 'jcommelin', 'leanprover-radar', 'mathlib-bors', 'mathlib-merge-conflicts'] |
nobody |
18-12240 18 days ago |
18-12241 18 days ago |
118-53197 118 days |
0 |
| 44013 |
vihdzp author:vihdzp |
chore(SetTheory/Cardinal/Divisibility): golf file |
We also move a few theorems about divisibility to an earlier file, and perform some renames.
---
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|
t-set-theory
maintainer-merge
merge-conflict
|
47/64 |
Mathlib/SetTheory/Cardinal/Arithmetic.lean,Mathlib/SetTheory/Cardinal/Basic.lean,Mathlib/SetTheory/Cardinal/Defs.lean,Mathlib/SetTheory/Cardinal/Divisibility.lean |
4 |
3 |
['Ruben-VandeVelde', 'github-actions', 'mathlib-merge-conflicts'] |
nobody |
18-8890 18 days ago |
18-8891 18 days ago |
1-79897 1 day |
0 |
| 36323 |
SproutSeeds author:SproutSeeds |
feat(Inversion): discontinuity and center/global fderiv formulas |
Part of #5939
I removed the `[Nontrivial F]` requirement and the nonzero-radius assumption from both `fderiv` formulas. The center lemma now explicitly covers the zero-radius case and subsingleton spaces, is marked with `@[simp]`, and is reused in the global formula.
The discontinuity lemma still retains its original assumptions, and I updated the center lemma’s docstring to explain when zero is used as the fallback value at a point where the function is not differentiable.
Rebased the inversion follow up onto current master after #36313 merged, removing the duplicated `Basic.lean` history and leaving only the intended `Calculus.lean` changes.
The incremental scope above #36313 is limited to `Mathlib/Geometry/Euclidean/Inversion/Calculus.lean`.
## Verification
- `lake build Mathlib.Geometry.Euclidean.Inversion.Calculus`
- `lake exe lint-style Mathlib.Geometry.Euclidean.Inversion.Calculus`
- `git diff --check`
The revision has been pushed. The local build passes, along with all 11 regression examples and the lint checks, and the hosted CI is green as well.
I used Codex to help with the implementation and verification.
---
Happy to adjust naming, placement, or proof style based on maintainer preference.
|
t-euclidean-geometry
new-contributor
LLM-generated
maintainer-merge
|
27/0 |
Mathlib/Geometry/Euclidean/Inversion/Calculus.lean |
1 |
10 |
['SproutSeeds', 'github-actions', 'jsm28', 'mathlib-merge-conflicts'] |
nobody |
16-665 16 days ago |
26-68262 26 days ago |
58-15088 58 days |
0 |
| 44102 |
wwylele author:wwylele |
feat(Geometry/Euclidean): dist with affineCombination on one side |
Supplementing existing theorems about `dist affineCombination affineCombination`, this one calculates `dist affineCombination Q` with `affineCombination` only on one side.
I intentionally did not follow the existing style in the file, and wrote `x ^ 2` instead of `x * x`. The latter results in unnecessary duplication and is not `ring`-normal form. The `x * x` style seems to appear a lot in old Euclidean geometry code. We should refactor them but that can be later.
---
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|
t-euclidean-geometry
maintainer-merge
|
30/0 |
Mathlib/Geometry/Euclidean/Basic.lean |
1 |
3 |
['github-actions', 'jsm28'] |
jsm28 assignee:jsm28 |
16-520 16 days ago |
17-78037 17 days ago |
17-78007 17 days |
2 |
| 44218 |
wwylele author:wwylele |
feat(Geometry/Euclidean): distance from vertex to nine-point circle center |
This PR derives the formula $$|AN|^2 = (R^2+c^2+b^2-a^2) / 4$$ for triangle $ABC$, where $N$ is the nine-point circle center, and $R$ is the circumradius. The PR first introduce the formula of distance from vertex to a generic point on the Euler line, then specialize it to `ninePointCircle`, and finally specialize it to triangle.
---
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|
t-euclidean-geometry
maintainer-merge
|
103/0 |
Mathlib/Geometry/Euclidean/Circumcenter.lean,Mathlib/Geometry/Euclidean/NinePointCircle.lean,Mathlib/LinearAlgebra/AffineSpace/Simplex/Centroid.lean |
3 |
3 |
['copilot-pull-request-reviewer', 'github-actions', 'jsm28'] |
nobody |
13-18582 13 days ago |
14-73888 14 days ago |
14-73858 14 days |
1 |
| 44227 |
mitchell-horner author:mitchell-horner |
chore(Combinatorics/SimpleGraph): remove `backward.isDefEq.respectTransparency.types` from `ErdosStoneSimonovits` and golf theorems |
Removes `backward.isDefEq.respectTransparency.types` from ErdosStoneSimonovits.lean and golfs several theorems.
---
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|
tech debt
t-combinatorics
maintainer-merge
|
58/68 |
Mathlib/Combinatorics/SimpleGraph/CompleteMultipartite.lean,Mathlib/Combinatorics/SimpleGraph/Extremal/ErdosStoneSimonovits.lean |
2 |
13 |
['SnirBroshi', 'github-actions', 'grunweg', 'mitchell-horner'] |
nobody |
12-77391 12 days ago |
13-57844 13 days ago |
13-63994 13 days |
0 |
| 37298 |
artie2000 author:artie2000 |
refactor(Algebra/Order): unbundle group and ring cone |
* Unbundle `GroupCone` and `RingCone` using `Submonoid.IsMulPointed`
This PR deprecates the [GroupCone](https://leanprover-community.github.io/mathlib4_docs/Mathlib/Algebra/Order/Group/Cone.html#GroupCone) and [RingCone](https://leanprover-community.github.io/mathlib4_docs/Mathlib/Algebra/Order/Ring/Cone.html#RingCone) structures, making use of the predicates `Submonoid.IsMulPointed` and `AddSubmonoid.IsPointed` defined in that file instead.
These predicates allow us to treat uniformly
* positive cones in groups and rings
* pointed cones in vector spaces over an ordered field
* orderings in rings
This reduces duplication of theorems.
Unbundling group and ring cones is further justified by the principle that there are no new operations on them: they correspond to operations on the underlying submonoids and subsemirings, respectively. See the discussion at https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/When.20should.20subobjects.20be.20bundled.3F/with/609099816
See also #36863 for the analogous change to ring orderings.
---
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|
t-algebra
large-import
increases-technical-debt
maintainer-merge
label:t-algebra$ |
127/29 |
Mathlib/Algebra/Group/Submonoid/Support.lean,Mathlib/Algebra/Order/Group/Cone.lean,Mathlib/Algebra/Order/Ring/Cone.lean |
3 |
37 |
['Vierkantor', 'YaelDillies', 'artie2000', 'github-actions', 'joneugster', 'mathlib-merge-conflicts'] |
nobody |
12-18524 12 days ago |
12-19888 12 days ago |
74-38733 74 days |
1 |
| 44060 |
wwylele author:wwylele |
feat(Geometry/Euclidean): lemma about excenters and volumes |
This proves that volume = inradius * surface / n
---
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|
t-euclidean-geometry
maintainer-merge
|
112/0 |
Mathlib.lean,Mathlib/Geometry/Euclidean/Volume/Incenter.lean |
2 |
8 |
['SnirBroshi', 'copilot-pull-request-reviewer', 'github-actions', 'jsm28', 'wwylele'] |
jsm28 assignee:jsm28 |
12-1264 12 days ago |
18-73739 18 days ago |
18-73709 18 days |
2 |
| 41505 |
homeowmorphism author:homeowmorphism |
feat(Algebra/Order): define left-orderable monoids and left-orderable groups |
A monoid `M` is *left-orderable* if it admits a linear order invariant under left multiplication
(`a ≤ b → c * a ≤ c * b`), *right-orderable* if it admits one invariant under right multiplication,
and *bi-orderable* if a single order is invariant under both — stronger than being both left- and
right-orderable, since those may need different orders. Moreover, these order becomes strict if the monoid is cancellative. This file defines the `Prop`-valued classes
`IsLeftOrderable`, `IsRightOrderable` and `IsBiOrderable`, and the instances producing them from a
compatible `LinearOrder`. Their richer theory over a *group*, where the two one-sided notions
coincide, is developed in `Mathlib/GroupTheory/Orderable.lean`.
Building on the monoid-level classes `IsLeftOrderable`, `IsRightOrderable` and `IsBiOrderable` (see
`Mathlib/Algebra/Order/Monoid/Orderable.lean`), adds the theory specific to a group `G`,
where inverses make the left- and right-handed notions coincide.
Co-authored by: Yaël Dillies <yael.dillies@gmail.com>
---
Zulip thread: https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/Dynamical.20realization.20of.20left-orderable.20groups.20project/
Authored using Claude Fable during the Fermat’s Last Theorem workshop in July 2026.
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[](https://gitpod.io/from-referrer/)
|
LLM-generated
t-group-theory
maintainer-merge
merge-conflict
|
473/1 |
Mathlib.lean,Mathlib/Algebra/Order/Group/Opposite.lean,Mathlib/Algebra/Order/Group/PiLex.lean,Mathlib/Algebra/Order/Monoid/Orderable/Defs.lean,Mathlib/Algebra/Order/Monoid/Orderable/Pi.lean,Mathlib/Algebra/Order/Monoid/Orderable/Prod.lean,Mathlib/Algebra/Order/Monoid/Prod.lean,Mathlib/Tactic/Translate/ToAdditive.lean |
8 |
106 |
['JovanGerb', 'YaelDillies', 'github-actions', 'homeowmorphism', 'mathlib-merge-conflicts', 'tb65536'] |
nobody |
10-24814 10 days ago |
10-24815 10 days ago |
37-59381 37 days |
0 |
| 41338 |
kim-em author:kim-em |
refactor(Combinatorics/SimpleGraph/CycleGraph): golf cycleGraph_isContained_iff via getVert |
Reopened from my fork, replacing #41268 (previously a branch on the main repo).
This PR rewrites the reverse direction of `cycleGraph_isContained_iff` from https://github.com/leanprover-community/mathlib4/pull/35255. Building the copy on `Walk.getVert` instead of `support` indexing makes the vertex map total, dispatches both adjacency cases through a single cyclic-successor helper (no `wlog`), handles the wraparound with `adj_penultimate`, and gets injectivity directly from `IsCycle.getVert_injOn'`.
🤖 Prepared with Claude Code |
t-combinatorics
LLM-generated
maintainer-merge
|
12/16 |
Mathlib/Combinatorics/SimpleGraph/CycleGraph.lean |
1 |
18 |
['SnirBroshi', 'github-actions', 'kim-em', 'mathlib-merge-conflicts', 'vlad902'] |
nobody |
9-65346 9 days ago |
40-64866 40 days ago |
59-21514 59 days |
0 |
| 44235 |
SnirBroshi author:SnirBroshi |
doc(1000-yaml): fill in a few Euclidean geometry items we have |
CPCTC ("Corresponding Parts of Congruent Triangles are Congruent") is from #26758 which was adopted from leanprover-community/mathlib3#18214, and intersecting chords/secants theorem is from leanprover-community/mathlib3#7139.
---
CPCTC ([PR](https://github.com/leanprover-community/mathlib4/pull/26758/changes), [original PR](https://github.com/leanprover-community/mathlib3/pull/18214/changes)) ([Wikipedia](https://en.wikipedia.org/wiki/Congruence_(geometry)#CPCTC)):
- [`EuclideanGeometry.triangle_congruent_iff_dist_eq`](https://leanprover-community.github.io/mathlib4_docs/Mathlib/Geometry/Euclidean/Congruence.html#EuclideanGeometry.triangle_congruent_iff_dist_eq) (this is almost a definitional theorem, except [`Congruent`](https://leanprover-community.github.io/mathlib4_docs/Mathlib/Topology/MetricSpace/Congruence.html#Congruent) is defined using `edist` and the theorem uses `dist`)
- [`EuclideanGeometry.angle_eq_of_congruent`](https://leanprover-community.github.io/mathlib4_docs/Mathlib/Geometry/Euclidean/Congruence.html#EuclideanGeometry.angle_eq_of_congruent) (for any amount of points, not just for triangles)
Intersecting secants theorem ([PR](https://github.com/leanprover-community/mathlib3/pull/7139/changes)) ([Wikipedia](https://en.wikipedia.org/wiki/Intersecting_secants_theorem)):
- [`EuclideanGeometry.mul_dist_eq_mul_dist_of_cospherical_of_angle_eq_zero`](https://leanprover-community.github.io/mathlib4_docs/Mathlib/Geometry/Euclidean/Sphere/Power.html#EuclideanGeometry.mul_dist_eq_mul_dist_of_cospherical_of_angle_eq_zero)
Intersecting chords theorem (same [PR](https://github.com/leanprover-community/mathlib3/pull/7139/changes)) ([Wikipedia](https://en.wikipedia.org/wiki/Intersecting_chords_theorem)):
- [`EuclideanGeometry.mul_dist_eq_mul_dist_of_cospherical_of_angle_eq_pi`](https://leanprover-community.github.io/mathlib4_docs/Mathlib/Geometry/Euclidean/Sphere/Power.html#EuclideanGeometry.mul_dist_eq_mul_dist_of_cospherical_of_angle_eq_pi)
---
btw perhaps CPCTC should use [`Polygon`](https://leanprover-community.github.io/mathlib4_docs/Mathlib/Geometry/Polygon/Basic.html#Polygon)?
And should the intersecting secants/chords theorems use [`Collinear`](https://leanprover-community.github.io/mathlib4_docs/Mathlib/LinearAlgebra/AffineSpace/FiniteDimensional.html#Collinear) & [`Wbtw`](https://leanprover-community.github.io/mathlib4_docs/Mathlib/Analysis/Convex/Between.html#Wbtw) instead of `angle .. = 0`/`π`?
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|
documentation
t-euclidean-geometry
maintainer-merge
|
10/0 |
docs/1000.yaml |
1 |
2 |
['github-actions', 'joneugster'] |
nobody |
8-20402 8 days ago |
14-14719 14 days ago |
14-14689 14 days |
0 |
| 44379 |
JokerXin2025 author:JokerXin2025 |
fix(tactic): skip implementation-detail declarations in `specialize_all` |
This commit fixes a bug in the `specialize_all` tactic that causes incorrect behavior in `specialize_all; assumption`.
In the original implementation of `specialize_all`, the statement `for h in ← getLCtx do` iterates over the entire local context without filtering out auxiliary declarations, particularly the theorem currently being proved. This allows the subsequent `assumption` tactic to directly use the local hypothesis produced by specializing that declaration, recursively “proving” the current theorem. This issue makes `tauto_set` unusable in many cases where it successfully executes `specialize_all` internally.
Here are some examples of the bug in `specialize_all` (before the fix):
```lean
import Mathlib.Tactic.TautoSet
/-- error: fail to show termination for
_example
with errors
failed to infer structural recursion:
Cannot use parameter x:
failed to eliminate recursive application
_example x✝ rfl -/
#guard_msgs (substring := true) in
example (x : ℕ) : {x} ⊆ Set.univ := by tauto_set
/-- error: fail to show termination for
_example -/
#guard_msgs (substring := true) in
example {α : Type} : α → False := by
intro x
specialize_all x
assumption
```
This issue does not cause Lean to accept the invalid proof, because it is rejected by the termination checker.
I fixed this issue by adding
```lean
unless h.isImplementationDetail do
```
after the loop statement above to filter out all implementation-detail hypotheses, including the auxiliary declaration for the current theorem. I also added three regression tests in `MathlibTest/Tactic/TautoSet.lean`. All three compile successfully now, but fail with `error: fail to show termination for ...` before the fix.
GPT-6-Astra was used to help locate the bug and translate the PR description to English.
---
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|
t-meta
new-contributor
maintainer-merge
|
21/2 |
Mathlib/Tactic/TautoSet.lean,MathlibTest/Tactic/TautoSet.lean |
2 |
11 |
['JokerXin2025', 'JovanGerb', 'github-actions', 'grunweg', 'plp127'] |
nobody |
8-8844 8 days ago |
8-49790 8 days ago |
9-323 9 days |
0 |
| 43745 |
theebayuser author:theebayuser |
feat(Geometry/Euclidean): add Euler's quadrilateral theorem |
Adds Euler's quadrilateral theorem to Mathlib/Geometry/Euclidean/, and records it in docs/1000.yaml (Q18630480). It states: for any four points, the sum of the squares of the four sides of the quadrilateral a b c d equals the sum of the squares of the two diagonals, plus four times the square of the distance between the midpoints of the diagonals.
This PR was written with AI assistance (Claude Code).
|
t-euclidean-geometry
new-contributor
LLM-generated
maintainer-merge
|
84/0 |
Mathlib.lean,Mathlib/Analysis/InnerProductSpace/Basic.lean,Mathlib/Geometry/Euclidean/EulerQuadrilateral.lean,docs/1000.yaml |
4 |
17 |
['github-actions', 'jsm28', 'theebayuser', 'wwylele'] |
nobody |
6-76976 6 days ago |
28-66461 28 days ago |
28-66431 28 days |
0 |
| 41696 |
vaca22 author:vaca22 |
feat(RingTheory): generalize relNorm_eq_pow_of_isMaximal to separable fraction field extensions |
Generalize `Ideal.relNorm_eq_pow_of_isMaximal` from `[PerfectField (FractionRing R)]` to `[Algebra.IsSeparable (FractionRing R) (FractionRing S)]`, covering e.g. function fields with imperfect constant fields.
Supporting additions:
- `IntermediateField.normalClosure.isSeparable`: the normal closure of a separable extension is separable.
- `IsGalois.normalClosure_of_isSeparable`: for `K/k` separable and `F/k` normal, `normalClosure k K F` is Galois over `k`.
AI disclosure: LLM tools were used for drafting code; I have reviewed and can explain all changes.
|
new-contributor
t-ring-theory
LLM-generated
maintainer-merge
|
20/3 |
Mathlib/FieldTheory/Galois/Basic.lean,Mathlib/FieldTheory/SeparableClosure.lean,Mathlib/RingTheory/Ideal/Norm/RelNorm.lean,Mathlib/RingTheory/NormalClosure.lean |
4 |
34 |
['felixpernegger', 'github-actions', 'leanprover-radar', 'tb65536', 'vaca22', 'xroblot'] |
nobody |
6-51343 6 days ago |
6-62741 6 days ago |
81-43576 81 days |
0 |
| 40728 |
Formalistic03 author:Formalistic03 |
feat(Combinatorics/SimpleGraph/Hasse): more properties of Hasse graphs of linear orders |
- two forms of an intermediate value theorem for linear orders
- the Hasse graph of a linear order is acyclic
- a path graph is locally finite
---
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[](https://gitpod.io/from-referrer/)
|
new-contributor
t-combinatorics
maintainer-merge
|
85/17 |
Mathlib/Combinatorics/SimpleGraph/Acyclic.lean,Mathlib/Combinatorics/SimpleGraph/CycleGraph.lean,Mathlib/Combinatorics/SimpleGraph/Hasse.lean,Mathlib/Data/Fintype/Defs.lean,Mathlib/Order/Cover.lean |
5 |
63 |
['Formalistic03', 'Multramate', 'SnirBroshi', 'b-mehta', 'github-actions', 'mathlib-merge-conflicts'] |
b-mehta assignee:b-mehta |
6-10350 6 days ago |
8-24814 8 days ago |
106-26313 106 days |
0 |
| 43964 |
benpigchu author:benpigchu |
feat(Geometry/Euclidean): theorems to prove line parallel from relation between oangles |
We have `EuclideanGeometry.two_zsmul_oangle_of_parallel` to derive relationship of oangles from parallel lines, but we do not have theorems to prove parallel of lines from relationship of oangles. This PR add theorems for that, and their iff version.
---
[](https://gitpod.io/from-referrer/) |
t-euclidean-geometry
new-contributor
maintainer-merge
|
110/0 |
Mathlib/Geometry/Euclidean/Angle/Oriented/Affine.lean,Mathlib/Geometry/Euclidean/Angle/Oriented/Basic.lean |
2 |
4 |
['github-actions', 'jsm28'] |
jsm28 assignee:jsm28 |
5-49907 5 days ago |
21-37356 21 days ago |
21-37326 21 days |
0 |
| 41220 |
wwylele author:wwylele |
feat(Geometry/Euclidean): two formula for area of a triangle |
This PR proves two basic formulas for triangle area: `s = 1/2 * h * b = 1/2 * a * b * sin C`
---
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- [ ] depends on #37910
[](https://gitpod.io/from-referrer/)
|
t-euclidean-geometry
maintainer-merge
|
108/0 |
Mathlib.lean,Mathlib/Geometry/Euclidean/Angle/Unoriented/Affine.lean,Mathlib/Geometry/Euclidean/Angle/Unoriented/Projection.lean,Mathlib/Geometry/Euclidean/Triangle.lean,Mathlib/Geometry/Euclidean/Volume/Triangle.lean |
5 |
19 |
['SnirBroshi', 'copilot-pull-request-reviewer', 'github-actions', 'jsm28', 'mathlib-bors', 'mathlib-merge-conflicts', 'wwylele'] |
jsm28 assignee:jsm28 |
5-11239 5 days ago |
5-12008 5 days ago |
18-71284 18 days |
3 |
| 40967 |
Formalistic03 author:Formalistic03 |
feat(Combinatorics/SimpleGraph/Paths): some lemmas about inducing walks |
Could also be done via `SimpleGraph.Walk.map_induce`, but I thought that doing it directly is not much worse.
---
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Moves:
- Vector.* -> List.Vector.*
- ...
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- Nat.bit1_add_bit1
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-->
[](https://gitpod.io/from-referrer/)
|
new-contributor
t-combinatorics
maintainer-merge
|
59/0 |
Mathlib/Combinatorics/SimpleGraph/Paths.lean,Mathlib/Combinatorics/SimpleGraph/Walk/Maps.lean,Mathlib/Data/List/Nodup.lean,Mathlib/Data/Sym/Sym2.lean |
4 |
34 |
['Formalistic03', 'SnirBroshi', 'github-actions'] |
b-mehta assignee:b-mehta |
5-731 5 days ago |
6-9948 6 days ago |
99-23645 99 days |
0 |
| 43910 |
vlad902 author:vlad902 |
feat(AffineSpace): exists affinely independent set of a cardinality dim + 1 |
Currently, `exists_affineIndependent` establishes for any set `s` that there exists a subset with equal affine span that is affinely indepedent. Further refine that statement to show that for finite dimensional spaces that this set always has cardinality equal to the affine dimension + 1.
---
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t-algebra
maintainer-merge
label:t-algebra$ |
38/0 |
Mathlib/LinearAlgebra/AffineSpace/FiniteDimensional.lean,Mathlib/LinearAlgebra/AffineSpace/Independent.lean |
2 |
9 |
['YaelDillies', 'github-actions', 'mathlib-merge-conflicts', 'vlad902'] |
nobody |
4-65459 4 days ago |
12-31146 12 days ago |
22-59944 22 days |
0 |
| 37730 |
RemyDegenne author:RemyDegenne |
feat: define total variation distance |
Define the total variation distance between two finite measures, using the variation of the difference seen as signed measures.
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t-measure-probability
maintainer-merge
|
572/2 |
Mathlib.lean,Mathlib/MeasureTheory/Integral/Bochner/Basic.lean,Mathlib/MeasureTheory/Measure/Decomposition/Lebesgue.lean,Mathlib/MeasureTheory/Measure/MutuallySingular.lean,Mathlib/MeasureTheory/Measure/TotalVariation/Basic.lean,Mathlib/MeasureTheory/Measure/TotalVariation/Defs.lean,Mathlib/MeasureTheory/Measure/WithDensity.lean,Mathlib/MeasureTheory/VectorMeasure/Operations.lean,Mathlib/MeasureTheory/VectorMeasure/TotalVariation.lean |
9 |
49 |
['DavidLedvinka', 'EtienneC30', 'RemyDegenne', 'github-actions', 'kex-y', 'mathlib-merge-conflicts'] |
EtienneC30 assignee:EtienneC30 |
4-26910 4 days ago |
5-36018 5 days ago |
68-26420 68 days |
0 |
| 26479 |
thefundamentaltheor3m author:thefundamentaltheor3m |
feat(Analysis/Complex/CauchyIntegral): Cauchy–Goursat for Unbounded Rectangles |
In this PR, we prove versions of the Cauchy-Goursat theorem where the contours in question are rectangular and unbounded (ie, where the contours look like the $\bigsqcup$ symbol). I am not sure if I have formalised these in the best way, or if `Analysis.Complex.CauchyIntegral` is the best place for them (it might be prudent to reorganise the file into multiple files at some point), but I believe this is a useful result. Suggestions welcome.
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new-contributor
t-analysis
sphere-packing
maintainer-merge
|
169/0 |
Mathlib/Analysis/Complex/CauchyIntegral.lean |
1 |
53 |
['github-actions', 'j-loreaux', 'loefflerd', 'mathlib-splicebot', 'mathlib4-merge-conflict-bot', 'ocfnash', 'thefundamentaltheor3m', 'themathqueen', 'wwylele'] |
j-loreaux assignee:j-loreaux |
3-68415 3 days ago |
9-78597 9 days ago |
137-71473 137 days |
0 |
| 44042 |
ooovi author:ooovi |
feat(LinearAlgebra/AffineSubspace): define the range of an `AffineMap` |
This PR adds the range of affine maps and provides some API, following `LinearMap.range`.
AI disclosure: I used LLMs for library search and code review.
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t-algebra
t-convex-geometry
maintainer-merge
label:t-algebra$ |
97/0 |
Mathlib.lean,Mathlib/LinearAlgebra/AffineSpace/AffineMap.lean,Mathlib/LinearAlgebra/AffineSpace/AffineSubspace/Range.lean |
3 |
11 |
['YaelDillies', 'gasparattila', 'github-actions'] |
nobody |
3-47763 3 days ago |
3-47763 3 days ago |
12-1440 12 days |
1 |
| 44518 |
NirvanaC93 author:NirvanaC93 |
feat(Topology/Algebra/Group/Units): product and units commute, and the units in products of topological monoids with open units are open (see also Topology/Algebra/IsOpenUnits) |
Co-authored-by: María Inés de Frutos-Fernández <88536493+mariainesdff@users.noreply.github.com>
---
In the ongoing formalization of Hasse-Minkowski Theorem on quadratic forms, we need the following:
Changes in Topology/Algebra/Group/Units:
```theorem ContinuousMulEquiv.piUnits_isOpenEmbedding```: Given a family of topological monoids M_i, (Π M_i)ˣ → Π M_i is an open embedding.
```def ContinuousMulEquiv.prodUnits```: The isomorphism of topological groups between the units of a product of two groups and the product of the units. This has an additive counterpart, ```ContinuousAddEquiv.sumAddUnits```.
```theorem ContinuousMulEquiv.prodUnits_isOpenEmbedding```: Given two topological monoids M and N, (M × N)ˣ → M × N is an open embedding.
And two simp lemmas: ContinuousMulEquiv.toMulEquiv_prodUnits and ContinuousMulEquiv.toHomeomorph_prodUnits
Changes is Topology/Algebra/IsOpenUnits:
Added the two instances that units in a product of two (or finitely many) topological monoids are open. |
t-topology
new-contributor
t-algebra
maintainer-merge
label:t-algebra$ |
61/5 |
Mathlib/Topology/Algebra/Group/Units.lean,Mathlib/Topology/Algebra/IsOpenUnits.lean |
2 |
41 |
['NirvanaC93', 'github-actions', 'j-loreaux', 'themathqueen'] |
nobody |
3-33268 3 days ago |
3-33268 3 days ago |
3-64235 3 days |
0 |
| 43792 |
justus-springer author:justus-springer |
chore(Algebra/Group/Pointwise/Set/SelfInv): put into lemmas into Set namespace |
Move all lemmas about self inverse sets into the `Set` namespace. This was suggested by @eric-wieser in #42611. Dot-notation is still accessible using the [DNRO](https://juliahimmel.de/blog/an-underappreciated-lean-feature/) feature.
`to_additive` needs a hint in order to translate into the correct namespace. I also fixed the to_additive of `IsSelfInv.prod` (this used to be translated to `IsSelfInv.sum` instead of `IsSelfNeg.prod`.
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t-algebra
maintainer-merge
label:t-algebra$ |
8/1 |
Mathlib/Algebra/Group/Pointwise/Set/SelfInv.lean |
1 |
6 |
['eric-wieser', 'github-actions', 'justus-springer', 'tb65536'] |
nobody |
3-32825 3 days ago |
26-49583 26 days ago |
26-49615 26 days |
2 |
| 43877 |
gloges author:gloges |
feat(LinearAlgeabra/MultilinearMap): notation for `MultilinearMap` |
Introduces the notation `M →ₗₘ[R] N` for `MultilinearMap R M N`, mirroring the notation `M →ₗ[R] N` for `LinearMap R M N`.
Closes #43855.
---
#42534 generalizes `MultilinearMap` to be semilinear and adds additional notation on top of this.
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|
new-contributor
t-algebra
maintainer-merge
label:t-algebra$ |
336/386 |
Mathlib/Analysis/Calculus/ContDiff/FaaDiBruno.lean,Mathlib/Analysis/Normed/Module/Multilinear/Basic.lean,Mathlib/Analysis/Normed/Module/Multilinear/Curry.lean,Mathlib/LinearAlgebra/Alternating/Basic.lean,Mathlib/LinearAlgebra/Alternating/DomCoprod.lean,Mathlib/LinearAlgebra/Multilinear/Basic.lean,Mathlib/LinearAlgebra/Multilinear/Basis.lean,Mathlib/LinearAlgebra/Multilinear/Curry.lean,Mathlib/LinearAlgebra/Multilinear/DFinsupp.lean,Mathlib/LinearAlgebra/Multilinear/DirectSum.lean,Mathlib/LinearAlgebra/Multilinear/FiniteDimensional.lean,Mathlib/LinearAlgebra/Multilinear/Finsupp.lean,Mathlib/LinearAlgebra/Multilinear/Pi.lean,Mathlib/LinearAlgebra/Multilinear/TensorProduct.lean,Mathlib/LinearAlgebra/PiTensorProduct/Basic.lean,Mathlib/LinearAlgebra/PiTensorProduct/Generators.lean,Mathlib/LinearAlgebra/TensorAlgebra/Basic.lean,Mathlib/LinearAlgebra/TensorPower/Pairing.lean,Mathlib/LinearAlgebra/TensorPower/Symmetric.lean,Mathlib/RingTheory/PiTensorProduct.lean,Mathlib/Topology/Algebra/Module/Multilinear/Basic.lean |
21 |
26 |
['github-actions', 'gloges', 'mathlib-merge-conflicts', 'themathqueen'] |
nobody |
3-13165 3 days ago |
3-15701 3 days ago |
5-29259 5 days |
3 |
| 44465 |
ishanrk author:ishanrk |
fix: handle nested conditionals in to_dual |
Before this PR, `@[to_dual]` failed with `function expected` on `nested_max` (the theorem in the issue above)
The problem was that `updateDecl` added helper functions to the `nested_max` proof (making the comparison functions' inputs explicit), but checked the modified proof against the original `nested_max` statement (which doesn't have these helpers). The nested comparison in the original statement also needed those helpers for Lean to recognise the function's inputs.
Fixes #42852. |
t-meta
new-contributor
maintainer-merge
|
25/5 |
Mathlib/Tactic/Translate/Core.lean,MathlibTest/Attribute/ToDual.lean |
2 |
9 |
['JovanGerb', 'github-actions', 'grunweg', 'ishanrk'] |
nobody |
3-3699 3 days ago |
3-4301 3 days ago |
6-47086 6 days |
0 |
| 40204 |
Jun2M author:Jun2M |
feat(Combinatorics/HypergraphLike): add HypergraphLike class |
Introduces `HypergraphLike V I E Gr`, an incidence interface for developing common graph theory across graph and hypergraph representations, including `SimpleGraph`, `Graph`, and `Digraph`.
The class specifies sets of vertices, edges, and incidences within ambient label types, with maps assigning each incidence an edge and a vertex. Each incidence is a source, a target, or both, allowing directed and undirected incidences in the same structure. Distinct incidences may belong to the same vertex and edge.
`Link G e u v` records two distinct incidences witnessing a traversal of `e` from `u` to `v`. Requiring distinct incidences prevents traversing an undirected edge back through the incidence used to enter it. `IsLink` expresses the existence of a link, and `Adj` the existence of an edge linking two vertices.
The basic API includes the incidence maps `attach` and `edgeMap`, the fibers `edgeFiber` and `vertexFiber`, and the sets `incVerts` and `incEdges` of incident vertices and edges. It provides membership characterizations, fiber disjointness and union identities, and their relationships with links and adjacency.
Related: #36743 and the [HasAdj discussion](https://leanprover.zulipchat.com/#narrow/channel/252551-graph-theory/topic/HasAdj/with/575843445).
Codex assisted with the initial implementation and review, and revised by me.
Co-authored-by: OpenAI Codex <codex@openai.com>
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t-combinatorics
LLM-generated
maintainer-merge
|
453/0 |
Mathlib.lean,Mathlib/Combinatorics/HypergraphLike/Basic.lean |
2 |
43 |
['Jun2M', 'SnirBroshi', 'YaelDillies', 'copilot-pull-request-reviewer', 'github-actions', 'tb65536'] |
nobody |
2-72892 2 days ago |
4-66039 4 days ago |
99-14311 99 days |
9 |
| 42704 |
gasparattila author:gasparattila |
refactor(Algebra): make the arguments of `Is*Apply` implicit |
Since `IsAddApply F α β` and similar classes have `[FunLike F α β]` as an assumption, `α` and `β` can always be inferred from `F`, so they can be made implicit.
---
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t-algebra
maintainer-merge
label:t-algebra$ |
280/280 |
Mathlib/Algebra/BigOperators/Pi.lean,Mathlib/Algebra/Group/FunLike.lean,Mathlib/Algebra/Group/IsApply.lean,Mathlib/Algebra/GroupWithZero/FunLike.lean,Mathlib/Algebra/Lie/Basic.lean,Mathlib/Algebra/Lie/Weights/Basic.lean,Mathlib/Algebra/Module/FunLike.lean,Mathlib/Algebra/Order/Group/End.lean,Mathlib/Algebra/Order/Module/PositiveLinearMap.lean,Mathlib/Algebra/Ring/FunLike.lean,Mathlib/Analysis/BoxIntegral/Partition/Additive.lean,Mathlib/Analysis/Distribution/ContDiffMapSupportedIn.lean,Mathlib/Analysis/Distribution/SchwartzSpace/Basic.lean,Mathlib/Analysis/Distribution/TestFunction.lean,Mathlib/Analysis/Normed/Group/Seminorm.lean,Mathlib/Analysis/Normed/Module/Seminorm/Basic.lean,Mathlib/Geometry/Convex/AffineMap/Module.lean,Mathlib/LinearAlgebra/Alternating/Basic.lean,Mathlib/LinearAlgebra/Multilinear/Basic.lean,Mathlib/LinearAlgebra/QuadraticForm/Basic.lean,Mathlib/MeasureTheory/OuterMeasure/Operations.lean,Mathlib/MeasureTheory/VectorMeasure/Basic.lean,Mathlib/NumberTheory/ModularForms/Basic.lean,Mathlib/NumberTheory/ModularForms/NormTrace.lean,Mathlib/NumberTheory/ModularForms/SlashInvariantForms.lean,Mathlib/NumberTheory/Padics/Measure/Basic.lean,Mathlib/Probability/Kernel/Defs.lean,Mathlib/RingTheory/Derivation/Basic.lean,Mathlib/Topology/Algebra/InfiniteSum/ContinuousEval.lean,Mathlib/Topology/Algebra/Module/ContinuousLinearMap/Basic.lean,Mathlib/Topology/Algebra/Module/ContinuousLinearMap/Positive.lean,Mathlib/Topology/Algebra/Module/Multilinear/Basic.lean,Mathlib/Topology/Algebra/Module/Spaces/UniformConvergenceCLM.lean |
33 |
9 |
['gasparattila', 'github-actions', 'mathlib-merge-conflicts', 'mcdoll'] |
joneugster assignee:joneugster |
2-40417 2 days ago |
3-13417 3 days ago |
53-44000 53 days |
0 |
| 44425 |
JovanGerb author:JovanGerb |
chore: deprecate `FP.Float` |
This PR deprecates `FP.Float`. This definition is very poorly documented, has not been touched since the port, and says it is experimental. Nowadays, lean core has a `Float` type with the ability to prove things about it, so I think it's better to remove `FP.Float`.
This PR is motivated by a new concrete instances linter. The parameter `[C : FloatCfg]` appearing in this file causes this linter to warn.
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|
t-data
increases-technical-debt
maintainer-merge
|
37/31 |
Mathlib/Algebra/Order/Interval/Basic.lean,Mathlib/Data/FP/Basic.lean |
2 |
3 |
['github-actions', 'grunweg'] |
nobody |
2-26878 2 days ago |
8-31717 8 days ago |
8-31687 8 days |
1 |
| 44033 |
kim-em author:kim-em |
chore(ci): explain and link the weekly linting report, with message locations |
This PR makes the weekly linting report posted to Zulip explain itself: the message now says it is `lake build` with the `linter.weeklyLintSet` linters enabled, and links to the linter set, this workflow and the reporting script at the commit that was built. Messages occurring at most twice list their locations, linked to the source, tables are capped at 20 rows so the message stays under Zulip's limit (this week's post was truncated), and a full report with every location goes to the GitHub job summary.
All of this needs https://github.com/leanprover-community/mathlib-ci/pull/77 and the automatic bump of the pinned mathlib-ci ref; until then the extra variables are ignored and the report is unchanged.
- [ ] depends on: https://github.com/leanprover-community/mathlib-ci/pull/77
🤖 Prepared with Claude Code
|
CI
blocked-by-other-PR
maintainer-merge
|
11/4 |
.github/workflows/weekly-lints.yml |
1 |
5 |
['github-actions', 'joneugster', 'mathlib-dependent-issues'] |
joneugster assignee:joneugster |
1-48440 1 day ago |
8-53264 8 days ago |
6-42084 6 days |
0 |
| 37907 |
grunweg author:grunweg |
feat(by_contra,contrapose): warn if the push_neg step does nothing |
---
- [x] depends on: #31597
- [x] depends on: #37899
- [x] depends on: #37937
- [x] depends on: #37999
- [x] depends on: #38008
- [x] depends on: #43999
- [x] depends on: #44084
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[](https://gitpod.io/from-referrer/)
|
t-meta
tech debt
maintainer-merge
|
64/15 |
Mathlib/Data/Set/Card.lean,Mathlib/FieldTheory/IntermediateField/Adjoin/Basic.lean,Mathlib/MeasureTheory/Function/LpSeminorm/SMul.lean,Mathlib/Tactic/ByCases.lean,Mathlib/Tactic/ByContra.lean,Mathlib/Tactic/Contrapose.lean,Mathlib/Tactic/Order.lean,MathlibTest/Tactic/ByContra.lean,MathlibTest/Tactic/Contrapose.lean,MathlibTest/Tactic/Order.lean |
10 |
15 |
['JovanGerb', 'SnirBroshi', 'github-actions', 'grunweg', 'joneugster', 'mathlib-dependent-issues', 'mathlib-merge-conflicts'] |
joneugster assignee:joneugster |
1-48278 1 day ago |
3-43330 3 days ago |
17-12172 17 days |
0 |
| 44622 |
grunweg author:grunweg |
chore(MathlibTest/Linter/DupNamespace): use the module system |
Because this is a good practice in general.
---
- [x] depends on: #44621
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|
easy
maintainer-merge
|
7/2 |
MathlibTest/Linter/DupNamespace.lean |
1 |
10 |
['JovanGerb', 'SnirBroshi', 'github-actions', 'grunweg', 'mathlib-dependent-issues'] |
nobody |
1-44215 1 day ago |
2-20978 2 days ago |
2-21008 2 days |
0 |
| 42538 |
NoahW314 author:NoahW314 |
feat: add Semilattice lemmas for `IsBotOneClass` |
These lemmas are analogous to the existing lemmas for `LinearOrder` + `IsBotOneClass`. The bot versions for Semilattices and LinearOrder also exist already.
---
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[](https://gitpod.io/from-referrer/)
|
t-algebra
maintainer-merge
label:t-algebra$ |
32/8 |
Mathlib/Algebra/Order/IsBotOne.lean |
1 |
5 |
['NoahW314', 'github-actions', 'themathqueen'] |
nobody |
1-40746 1 day ago |
1-75198 1 day ago |
60-70169 60 days |
0 |
| 43981 |
plp127 author:plp127 |
fix: setting `pp.mdata` to true breaks `@[pp_with_univ]` |
This PR fixes an issue where turning on `pp.mdata` causes constants tagged with `@[pp_with_univ]` to print as
```
[mdata pp.universes:true]
[mdata pp.universes:true]
[mdata pp.universes:true]
[mdata pp.universes:true]
[mdata pp.universes:true]
[mdata pp.universes:true] [mdata pp.universes:true] [mdata pp.universes:true] [mdata pp.universes:true] ⋯
```
When `pp.mdata` is set to true, expressions with mdata are printed by first printing the mdata and the printing the bare expression underneath. This breaks `@[pp_with_univ]` which works by applying mdata setting `pp.universes` to true onto the constant name, and then redelaborating the new expression containing mdata. This causes an infinite loop the the delaborator since `@[pp_with_univ]` applies the mdata, and then since `pp.mdata` is true the mdata is removed before delaborating the constant, which then has mdata applied again, and so on. We fix the issue by instead having the implementation of `@[pp_with_univ]` directly set the `pp.universes` option, instead of delegating it to `delabMData` with a metadata.
---
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|
t-meta
maintainer-merge
|
63/6 |
Mathlib/Tactic/PPWithUniv.lean,MathlibTest/Delab/PPWithUniv.lean |
2 |
10 |
['JovanGerb', 'github-actions', 'joneugster', 'plp127'] |
joneugster assignee:joneugster |
1-40607 1 day ago |
1-44507 1 day ago |
16-3023 16 days |
0 |
| 44660 |
jessealama author:jessealama |
feat(Combinatorics/SimpleGraph/Hamiltonian): close a Hamiltonian path into a Hamiltonian cycle |
Add `SimpleGraph.Walk.isHamiltonianCycle_cons`: closing a path `p` from `b` to `a` with an edge `a ~ b` gives a Hamiltonian cycle if and only if `p` is a Hamiltonian path that does not already use that edge.
This is the Hamiltonian analogue of `Walk.cons_isCycle_iff`. It was originally extracted at @YaelDillies's suggestion during review of #36376, which no longer needs it.
|
t-combinatorics
maintainer-merge
|
6/0 |
Mathlib/Combinatorics/SimpleGraph/Hamiltonian.lean |
1 |
5 |
['SnirBroshi', 'github-actions'] |
nobody |
1-39924 1 day ago |
1-39975 1 day ago |
1-41013 1 day |
0 |
| 44321 |
mcdoll author:mcdoll |
chore(Analysis/Normed): generalize `ContinuousMultilinearMap.curry0` to TVS |
Move and generalize the definition and basic properties of `curry0` and `uncurry0` to topological space. Needed to generalize iterated derivatives to TVS.
---
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|
t-analysis
maintainer-merge
|
29/37 |
Mathlib/Analysis/Normed/Module/Multilinear/Curry.lean,Mathlib/Topology/Algebra/Module/Multilinear/Basic.lean |
2 |
3 |
['github-actions', 'themathqueen'] |
nobody |
1-38942 1 day ago |
2-3013 2 days ago |
11-16343 11 days |
0 |
| 44368 |
emlis42 author:emlis42 |
feat: implement OEIS attribute |
This PR implements OEIS attribute. This allows users to link Mathlib declarations to OEIS entries.
The implementation is copied from the Wikidata attribute.
The OEIS (On-Line Encyclopedia of Integer Sequences) is an online database of integer sequences. (see also [wikipedia](https://en.wikipedia.org/wiki/On-Line_Encyclopedia_of_Integer_Sequences), [OEIS](https://oeis.org), [provables/sequencelib](https://github.com/provables/sequencelib)).
This follows the same pattern as the DLMF attribute (#42899). |
t-meta
maintainer-merge
|
145/11 |
Mathlib/Tactic/CrossRefAttribute.lean,MathlibTest/CrossRefAttribute.lean,scripts/README.md,scripts/export_crossrefs.lean |
4 |
17 |
['SnirBroshi', 'emlis42', 'github-actions', 'joneugster', 'luigi-massacci'] |
nobody |
1-38161 1 day ago |
10-20901 10 days ago |
10-20871 10 days |
1 |
| 43183 |
BorisTheBrave author:BorisTheBrave |
fix(Tactic/Linarith): carry `!` and the configuration into `linarith?… |
`linarith?` uses the same configuration as `linarith`,
but previously printed a bare `linarith only [...]` suggestion regardless
of the configuration.
Now all config options except `minimize` are carried into the suggestion.
---
Note: #42588 has a [test](https://github.com/leanprover-community/mathlib4/pull/42588/files#diff-3657543f804f0a57e384f6a9338cc53803a50bebdfb16c1ecd0b514f3fda332fR863) that
unintentionally highlights the problem:
```lean
/--
info: Try this:
[apply] linarith only [hne, hle]
-/
#guard_msgs in
example (a b : ℚ) (hne : a ≠ b) (hle : a ≥ b) (junk : (0:ℚ) < 1) : b < a := by
linarith? +splitNe
```
This suggestion doesn't actually close the proof.
It should suggest `linarith +splitNE only [hne, hle]`.
Should we be using `says` syntax for these tests? I'm unclear on the rule here.
Note: `simp?` has very similar code, `filterSuggestionsAndLocalsFromSimpConfig`, that this PR was modelled after.
AI disclosure:
Claude Code (Fable) first flagged this problem to me, and wrote the first draft. I
made some tweaks to better fit mathlib's style, and wrote all the prose.
[](https://gitpod.io/from-referrer/) |
t-meta
new-contributor
maintainer-merge
|
68/6 |
Mathlib/Tactic/Linarith/Frontend.lean,MathlibTest/Tactic/Linarith/Basic.lean |
2 |
18 |
['BorisTheBrave', 'JovanGerb', 'github-actions', 'joneugster', 'sharky564'] |
joneugster assignee:joneugster |
1-37677 1 day ago |
36-45044 36 days ago |
43-43234 43 days |
0 |
| 44532 |
SnirBroshi author:SnirBroshi |
doc(1000-yaml): clarify ambiguous titles, add new items, fix formatting |
- Added "(subject)" to titles which appear multiple times
(e.g. "Euler's theorem" → "Euler's theorem (number theory)" and "Euler's theorem (differential geometry)")
- "Gentzen's consistency proof" was added in https://github.com/1000-plus/1000-plus.github.io/pull/36
- "Determination of the fifth Busy Beaver value" was added in https://github.com/1000-plus/1000-plus.github.io/pull/46
- The ID of "Lamé’s theorem" was changed in https://github.com/1000-plus/1000-plus.github.io/pull/39
- Moved "Bézout's identity" to keep the list sorted by the ID
- Fix formatting
---
In case you're wondering about `comment`s not being quoted (like `title`s), I've checked with the same way these are parsed by CI (PyYAML's `yaml.safe_load()`) that they're parsed the same way with and without quotes. A couple of `comment`s still have quotes because they need them.
btw "Bézout's identity" isn't in the [website](https://1000-plus.github.io/all) (only "Bézout's theorem", which is a different item) but it is in the yaml, and AFAICT the intention was to PR it to the list since it's in [Wikipedia's list](https://en.wikipedia.org/wiki/List_of_theorems), so I didn't delete it. See the PR description of #21926.
(if we do PR it, I think [this](https://github.com/1000-plus/1000-plus.github.io/blob/8e04b97dd24adc6e931be78a884da7e935bc8780/sync_mathlib_data.py#L374-L377) can be deleted)
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|
documentation
maintainer-merge
|
81/79 |
docs/100.yaml,docs/1000.yaml |
2 |
6 |
['SnirBroshi', 'github-actions', 'grunweg', 'joneugster'] |
nobody |
1-35022 1 day ago |
4-73926 4 days ago |
4-73896 4 days |
0 |
| 43676 |
SnirBroshi author:SnirBroshi |
doc(Order): `wikidata` tags for some basics |
---
I'm using the `attribute [wikidata ...] ...` syntax instead of `@[wikidata ...]` when things are `@[to_dual]`, because otherwise the Wikidata link doesn't appear in the docstring from some reason.
I'm not entirely sure if this is because of `@[to_dual]`, or classes, or just about decls that have an explicit docstring.
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Second, co-authors can also be listed in lines at the very bottom of
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[](https://gitpod.io/from-referrer/)
|
t-order
documentation
maintainer-merge
|
52/5 |
Mathlib/Order/BoundedOrder/Basic.lean,Mathlib/Order/Bounds/Defs.lean,Mathlib/Order/Closure.lean,Mathlib/Order/CompleteLattice/Defs.lean,Mathlib/Order/CompletePartialOrder.lean,Mathlib/Order/Defs/Lattice.lean,Mathlib/Order/Defs/LinearOrder.lean,Mathlib/Order/Defs/PartialOrder.lean,Mathlib/Order/Defs/Unbundled.lean,Mathlib/Order/Disjoint.lean,Mathlib/Order/Filter/Defs.lean,Mathlib/Order/GaloisConnection/Defs.lean,Mathlib/Order/Ideal.lean,Mathlib/Order/Max.lean,Mathlib/Order/Monotone/Defs.lean |
15 |
8 |
['SnirBroshi', 'github-actions', 'joneugster', 'mathlib-merge-conflicts'] |
joneugster assignee:joneugster |
1-35016 1 day ago |
1-38522 1 day ago |
30-10849 30 days |
0 |
| 44414 |
kim-em author:kim-em |
ci: report declarations moving into or out of meta in the declarations diff |
This PR makes the post-build declarations diff report declarations whose `meta` marking changed. The build passes `--meta-out meta_decls.txt` to the declaration dumper, uploads the file with the `import-graph` artifact, and `decls-diff.yml` passes both sides' files to the `decls-diff` action.
The `--meta-out` flag and the action inputs come from https://github.com/leanprover-community/mathlib-ci/pull/83 "feat: report declarations moving into or out of meta in the declarations diff". Until that lands and the pinned `mathlib-ci` ref is bumped, the build detects that the dumper lacks the flag and skips the dump, so this PR is safe to merge in either order. Master artifacts built before this change have no `meta_decls.txt`; for PRs whose merge-base predates it, the diff notes that `meta` changes are unavailable.
Motivated by https://leanprover.zulipchat.com/#narrow/channel/180721-mathlib-maintainers/topic/ensuring.20.60import.20Mathlib.60.20doesn.27t.20expose.20Lean.20internals/near/627447584
🤖 Prepared with Claude Code |
CI
maintainer-merge
|
18/3 |
.github/workflows/build_template.yml,.github/workflows/decls-diff.yml |
2 |
2 |
['github-actions', 'joneugster'] |
nobody |
1-33025 1 day ago |
8-55893 8 days ago |
8-55863 8 days |
0 |
| 43669 |
SnirBroshi author:SnirBroshi |
doc(Topology): `wikidata` tags for some basics |
---
I manually added comments on every tag, hope it helps reviewing.
<!-- Your PR title will become the first line of the commit message.
In this box, the text above the `---` (if not empty) will be appended
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Co-authors in the squash commit are gathered from two sources:
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Second, co-authors can also be listed in lines at the very bottom of
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Moves:
- Vector.* -> List.Vector.*
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- Nat.bit1_add_bit1
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below the `---`, and placed outside this HTML comment, or else they
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-->
[](https://gitpod.io/from-referrer/)
|
t-topology
documentation
maintainer-merge
|
19/3 |
Mathlib/Topology/Defs/Basic.lean,Mathlib/Topology/Defs/Filter.lean,Mathlib/Topology/Defs/Induced.lean,Mathlib/Topology/GDelta/Basic.lean,Mathlib/Topology/Homeomorph/Defs.lean,Mathlib/Topology/MetricSpace/Pseudo/Defs.lean |
6 |
24 |
['SnirBroshi', 'github-actions', 'joneugster', 'mathlib-merge-conflicts'] |
joneugster assignee:joneugster |
1-32824 1 day ago |
11-980 11 days ago |
30-19894 30 days |
0 |
| 44323 |
marcelolynch author:marcelolynch |
chore(Init): stop setting a default library suggestions engine |
This PR removes `public import Lean.LibrarySuggestions.Default` from `Mathlib.Init`. Thus Mathlib no longer sets a default library suggestions engine. Since leanprover/lean4#15159, the default engine builds its index on the first query in each process, and with `import Mathlib` this takes minutes. The Lean maintainers consider the feature unused.
Without an engine, the `+suggestions` modes of `grind`, `simp?`, `simp_all?` and `solve_by_elim` fail until the file adds `import Lean.LibrarySuggestions.Default` or `set_library_suggestions`. `try?` continues to work.
The PR also removes the outdated `set_library_suggestions` override from `MathlibTest/RegisterTryTactic.lean`, and replaces the `grind +suggestions` docstring examples with `grind`. `Mathlib.Tactic.DuplicateDecls` now imports `Lean.Meta.CompletionName` directly.
Discussion: [#lean4 > lean4#15159 causes significant regression in MathlibTests](https://leanprover.zulipchat.com/#narrow/channel/270676-lean4/topic/lean4.2315159.20causes.20significant.20regression.20in.20MathlibTests)
🤖 Generated with [Claude Code](https://claude.com/claude-code)
|
t-meta
LLM-generated
maintainer-merge
|
4/10 |
Mathlib/Init.lean,Mathlib/Tactic/DuplicateDecls.lean,Mathlib/Tactic/TacticAnalysis/Declarations.lean,MathlibTest/RegisterTryTactic.lean |
4 |
5 |
['JovanGerb', 'github-actions', 'joneugster', 'leanprover-radar'] |
nobody |
1-30453 1 day ago |
11-22463 11 days ago |
11-22433 11 days |
0 |
| 44306 |
grunweg author:grunweg |
chore: rename check_title_labels in kebap-case |
This matches general conventions for such tools, as discussed on Zulip: https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/Naming.20convention/near/451072858
---
<!-- Your PR title will become the first line of the commit message.
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Second, co-authors can also be listed in lines at the very bottom of
the commit message (that is, directly before the `---`) using the following format:
Co-authored-by: Author Name <author@email.com>
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at the bottom of the commit message (before the `---`, and also before
any "Co-authored-by" lines) using the following format:
Moves:
- Vector.* -> List.Vector.*
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- Nat.bit1_add_bit1
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below the `---`, and placed outside this HTML comment, or else they
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-->
|
CI
maintainer-merge
|
71/4 |
.github/workflows/build_template.yml,.github/workflows/check_pr_titles.yaml,lakefile.lean,scripts/README.md,scripts/check-title-labels.lean,scripts/check_title_labels.lean |
6 |
23 |
['Vierkantor', 'github-actions', 'grunweg', 'joneugster', 'marcelolynch', 'mathlib-bors'] |
nobody |
1-27606 1 day ago |
11-13 10 days ago |
11-2151 11 days |
0 |
| 42536 |
JovanGerb author:JovanGerb |
fix(Linter/UnusedTactic): don't use `IO.Ref` for extensibility |
This PR cleans up the unused tactic linter extensibility implementation. Previously, this was implemented using a `PersistentEnvExtension` and an `IO.Ref`. The problem with the `IO.Ref` is that it creates "spooky action at a distance": a command later in the file can affect what happens earlier in the file. Instead, we can allow both local and global modifications using a `SimpleScopedEnvExtension`.
Previously, the list of exceptions was unnaturally split into the two files. This PR makes it into just a single list.
Additionally:
- `#allow_unused_tactic` is deprecated in favour of `allow_unused_tactic`
- We put a namespace around the `change?` syntax, so that `change?` is not anymore a declared constant.
---
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-->
[](https://gitpod.io/from-referrer/)
|
file-removed
t-linter
maintainer-merge
|
128/148 |
Mathlib.lean,Mathlib/Init.lean,Mathlib/Tactic.lean,Mathlib/Tactic/Change.lean,Mathlib/Tactic/Linter/UnusedTactic.lean,Mathlib/Tactic/Linter/UnusedTacticExtension.lean,MathlibTest/Linter/UnusedTactic.lean |
7 |
26 |
['JovanGerb', 'adomani', 'github-actions', 'grunweg', 'leanprover-radar', 'mathlib-merge-conflicts', 'thorimur'] |
thorimur assignee:thorimur |
1-24027 1 day ago |
1-29044 1 day ago |
18-69295 18 days |
0 |
| 42355 |
sankalpsthakur author:sankalpsthakur |
fix(NormNum): error if remaining at locations are unused |
`norm_num at h1 h2 ...` (and other tactics built on `Lean.Elab.Tactic.withNondepPropLocation`) unconditionally processed every hypothesis in the location list, then the target. If an earlier hypothesis closed the goal (e.g. `norm_num` found `h1` to already be `False`), processing continued against an already-closed goal instead of stopping.
Unused `at` locations now error if an earlier location closed the goal.
Closes #28703.
---------
Note. `withNondepPropLocation` currently has no other callers in the Mathlib tree besides its own definition file.
AI coding tools were used to help draft this change and PR description. I reviewed the complete change, understand the reasoning, and verified the build locally before submitting. |
new-contributor
LLM-generated
t-meta
maintainer-merge
|
32/2 |
Mathlib/Util/AtLocation.lean,MathlibTest/Tactic/NormNum/Basic.lean |
2 |
24 |
['github-actions', 'grunweg', 'joneugster', 'mathlib-merge-conflicts', 'sankalpsthakur', 'thorimur'] |
joneugster assignee:joneugster |
1-17120 1 day ago |
28-58228 28 days ago |
48-59474 48 days |
0 |
| 42880 |
plp127 author:plp127 |
chore(Data/EReal): don't expose `EReal.recENNReal` |
Unexpose `EReal.recENNReal` because it uses an if-then-else block on a classical decidability instance, which will not reduce. Also golf the proofs of the theorems `EReal.recENNReal_coe_ennreal` and `EReal.recENNReal_neg_coe_ennreal`.
---
<!-- Your PR title will become the first line of the commit message.
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Co-authors in the squash commit are gathered from two sources:
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Second, co-authors can also be listed in lines at the very bottom of
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Moves:
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- Nat.bit1_add_bit1
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below the `---`, and placed outside this HTML comment, or else they
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-->
[](https://gitpod.io/from-referrer/)
|
t-data
maintainer-merge
|
9/13 |
Mathlib/Data/EReal/Operations.lean |
1 |
3 |
['FrankieNC', 'github-actions', 'joneugster'] |
joneugster assignee:joneugster |
1-13066 1 day ago |
54-11380 54 days ago |
54-11350 54 days |
0 |
| 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 |
blocks |
| 33077 |
YaelDillies author:YaelDillies |
feat(Basic/Rel): balls |
Define `SetRel.ball` and use it in place of `UniformSpace.ball`.
---
<!-- Your PR title will become the first line of the commit message.
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any "Co-authored-by" lines) using the following format:
Moves:
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[](https://gitpod.io/from-referrer/)
|
t-data
maintainer-merge
|
392/299 |
Mathlib/Basic/Rel.lean,Mathlib/Basic/Rel/Cover.lean,Mathlib/Dynamics/TopologicalEntropy/CoverEntropy.lean,Mathlib/Dynamics/TopologicalEntropy/DynamicalEntourage.lean,Mathlib/Dynamics/TopologicalEntropy/NetEntropy.lean,Mathlib/Dynamics/TopologicalEntropy/Semiconj.lean,Mathlib/Dynamics/TopologicalEntropy/Subset.lean,Mathlib/MeasureTheory/Measure/LevyProkhorovMetric.lean,Mathlib/MeasureTheory/Measure/RegularityCompacts.lean,Mathlib/RingTheory/LaurentSeries.lean,Mathlib/Topology/Algebra/Module/LocallyConvex.lean,Mathlib/Topology/EMetricSpace/Basic.lean,Mathlib/Topology/MetricSpace/Pseudo/Defs.lean,Mathlib/Topology/MetricSpace/Pseudo/Lemmas.lean,Mathlib/Topology/Metrizable/Basic.lean,Mathlib/Topology/Semicontinuity/Hemicontinuity.lean,Mathlib/Topology/Sequences.lean,Mathlib/Topology/UniformSpace/Basic.lean,Mathlib/Topology/UniformSpace/Cauchy.lean,Mathlib/Topology/UniformSpace/Closeds.lean,Mathlib/Topology/UniformSpace/Compact.lean,Mathlib/Topology/UniformSpace/CompactConvergence.lean,Mathlib/Topology/UniformSpace/Defs.lean,Mathlib/Topology/UniformSpace/Equicontinuity.lean,Mathlib/Topology/UniformSpace/HeineCantor.lean,Mathlib/Topology/UniformSpace/Separation.lean,Mathlib/Topology/UniformSpace/Ultra/Basic.lean,Mathlib/Topology/UniformSpace/UniformConvergenceTopology.lean,Mathlib/Topology/UniformSpace/UniformEmbedding.lean,Mathlib/Topology/UniformSpace/Uniformizable.lean |
30 |
7 |
['SnirBroshi', 'YaelDillies', 'github-actions', 'joneugster', 'mathlib-merge-conflicts'] |
nobody |
20-40991 20 days ago |
26-36924 26 days ago |
33-62180 33 days |
0 |
| 41484 |
FernandoChu author:FernandoChu |
feat(CategoryTheory): kan extensions from isos |
This PR constructs lifts out of isomorphisms of 1-cells, and shows that being (abs) Kan is preserved by this. This is done for all four notions of left/right lifts/extensions.
This is needed for the oo-cosmos project.
----
**AI disclosure**. Claude was used in defining the API for the left extension case. After manually fixing its bad proofs/definitions/docstrings, Claude was later asked to replicate this for the other three cases, which I again finetuned. |
t-category-theory
LLM-generated
large-import
maintainer-merge
tech debt
|
413/79 |
Mathlib/CategoryTheory/Bicategory/Extension.lean,Mathlib/CategoryTheory/Bicategory/Kan/IsKan.lean |
2 |
24 |
['FernandoChu', 'github-actions', 'grunweg', 'robin-carlier'] |
nobody |
18-76975 18 days ago |
40-34771 40 days ago |
92-41025 92 days |
1 |
| 38534 |
AlexeyMilovanov author:AlexeyMilovanov |
refactor(Computability): make `PFun` a one-field structure |
This PR refactors `PFun` from `def PFun α β := α → Part β` to a structure with a `FunLike` instance.
[Discussion](https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/Fix.20for.20fun_prop.20on.20PFun.20.28context.3A.20Computability.20Theory.29)
### Main changes
- Redefine `PFun` as a structure with one field, `toFun : α → Part β`.
- Add the `FunLike (α →. β) α (Part β)` instance and configure `simps` projections.
- Add the projection and application simp lemmas required by the structure wrapper.
- Add `fun x ↦. ...` notation for partial-function literals.
- Adapt downstream equality proofs to use `PFun.ext` or `DFunLike.ext` where
`funext` no longer applies directly.
- Remove 33 local `backward.isDefEq.respectTransparency false` workarounds that
are no longer needed after the refactor.
### Downstream impact
The refactor mainly impacts Computability Theory and Category Theory (`Category/PartialFun.lean`). Since `PFun` is no longer definitionally equal to `α → Part β`, tactics such as `rfl`, `simp`, and `funext` can no longer always see through the old raw-function representation.
### Note on LLM usage
The core `PFun` change caused numerous downstream errors. I initially used an LLM to help draft fixes for these files. Afterwards, I spent a significant amount of time manually correcting and modifying all of the generated changes. |
new-contributor
t-computability
tech debt
LLM-generated
maintainer-merge
merge-conflict
|
599/544 |
Mathlib/CategoryTheory/Category/PartialFun.lean,Mathlib/Computability/Ackermann.lean,Mathlib/Computability/Partrec.lean,Mathlib/Computability/PartrecBasis.lean,Mathlib/Computability/PartrecCode.lean,Mathlib/Computability/RE.lean,Mathlib/Computability/RecursiveIn.lean,Mathlib/Computability/StateTransition.lean,Mathlib/Computability/TuringDegree.lean,Mathlib/Computability/TuringMachine/Config.lean,Mathlib/Data/Finset/PImage.lean,Mathlib/Data/PFun.lean,Mathlib/NumberTheory/Dioph.lean |
13 |
79 |
['AlexeyMilovanov', 'JovanGerb', 'YaelDillies', 'dagurtomas', 'github-actions', 'j-loreaux', 'jcommelin', 'leanprover-radar', 'mathlib-bors', 'mathlib-merge-conflicts'] |
nobody |
18-12240 18 days ago |
18-12241 18 days ago |
118-53197 118 days |
0 |
| 44013 |
vihdzp author:vihdzp |
chore(SetTheory/Cardinal/Divisibility): golf file |
We also move a few theorems about divisibility to an earlier file, and perform some renames.
---
<!-- Your PR title will become the first line of the commit message.
In this box, the text above the `---` (if not empty) will be appended
to the commit message, and can be used to give additional context or
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will format the text above it as a title.
For details on the "pull request lifecycle" in mathlib, please see:
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In particular, note that most reviewers will only notice your PR
if it passes the continuous integration checks.
Please ask for help on https://leanprover.zulipchat.com if needed.
When merging, all the commits will be squashed into a single commit
listing all co-authors.
Co-authors in the squash commit are gathered from two sources:
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|
t-set-theory
maintainer-merge
merge-conflict
|
47/64 |
Mathlib/SetTheory/Cardinal/Arithmetic.lean,Mathlib/SetTheory/Cardinal/Basic.lean,Mathlib/SetTheory/Cardinal/Defs.lean,Mathlib/SetTheory/Cardinal/Divisibility.lean |
4 |
3 |
['Ruben-VandeVelde', 'github-actions', 'mathlib-merge-conflicts'] |
nobody |
18-8890 18 days ago |
18-8891 18 days ago |
1-79897 1 day |
0 |
| 36323 |
SproutSeeds author:SproutSeeds |
feat(Inversion): discontinuity and center/global fderiv formulas |
Part of #5939
I removed the `[Nontrivial F]` requirement and the nonzero-radius assumption from both `fderiv` formulas. The center lemma now explicitly covers the zero-radius case and subsingleton spaces, is marked with `@[simp]`, and is reused in the global formula.
The discontinuity lemma still retains its original assumptions, and I updated the center lemma’s docstring to explain when zero is used as the fallback value at a point where the function is not differentiable.
Rebased the inversion follow up onto current master after #36313 merged, removing the duplicated `Basic.lean` history and leaving only the intended `Calculus.lean` changes.
The incremental scope above #36313 is limited to `Mathlib/Geometry/Euclidean/Inversion/Calculus.lean`.
## Verification
- `lake build Mathlib.Geometry.Euclidean.Inversion.Calculus`
- `lake exe lint-style Mathlib.Geometry.Euclidean.Inversion.Calculus`
- `git diff --check`
The revision has been pushed. The local build passes, along with all 11 regression examples and the lint checks, and the hosted CI is green as well.
I used Codex to help with the implementation and verification.
---
Happy to adjust naming, placement, or proof style based on maintainer preference.
|
t-euclidean-geometry
new-contributor
LLM-generated
maintainer-merge
|
27/0 |
Mathlib/Geometry/Euclidean/Inversion/Calculus.lean |
1 |
10 |
['SproutSeeds', 'github-actions', 'jsm28', 'mathlib-merge-conflicts'] |
nobody |
16-665 16 days ago |
26-68262 26 days ago |
58-15088 58 days |
0 |
| 44102 |
wwylele author:wwylele |
feat(Geometry/Euclidean): dist with affineCombination on one side |
Supplementing existing theorems about `dist affineCombination affineCombination`, this one calculates `dist affineCombination Q` with `affineCombination` only on one side.
I intentionally did not follow the existing style in the file, and wrote `x ^ 2` instead of `x * x`. The latter results in unnecessary duplication and is not `ring`-normal form. The `x * x` style seems to appear a lot in old Euclidean geometry code. We should refactor them but that can be later.
---
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|
t-euclidean-geometry
maintainer-merge
|
30/0 |
Mathlib/Geometry/Euclidean/Basic.lean |
1 |
3 |
['github-actions', 'jsm28'] |
jsm28 assignee:jsm28 |
16-520 16 days ago |
17-78037 17 days ago |
17-78007 17 days |
2 |
| 44218 |
wwylele author:wwylele |
feat(Geometry/Euclidean): distance from vertex to nine-point circle center |
This PR derives the formula $$|AN|^2 = (R^2+c^2+b^2-a^2) / 4$$ for triangle $ABC$, where $N$ is the nine-point circle center, and $R$ is the circumradius. The PR first introduce the formula of distance from vertex to a generic point on the Euler line, then specialize it to `ninePointCircle`, and finally specialize it to triangle.
---
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|
t-euclidean-geometry
maintainer-merge
|
103/0 |
Mathlib/Geometry/Euclidean/Circumcenter.lean,Mathlib/Geometry/Euclidean/NinePointCircle.lean,Mathlib/LinearAlgebra/AffineSpace/Simplex/Centroid.lean |
3 |
3 |
['copilot-pull-request-reviewer', 'github-actions', 'jsm28'] |
nobody |
13-18582 13 days ago |
14-73888 14 days ago |
14-73858 14 days |
1 |
| 44227 |
mitchell-horner author:mitchell-horner |
chore(Combinatorics/SimpleGraph): remove `backward.isDefEq.respectTransparency.types` from `ErdosStoneSimonovits` and golf theorems |
Removes `backward.isDefEq.respectTransparency.types` from ErdosStoneSimonovits.lean and golfs several theorems.
---
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|
tech debt
t-combinatorics
maintainer-merge
|
58/68 |
Mathlib/Combinatorics/SimpleGraph/CompleteMultipartite.lean,Mathlib/Combinatorics/SimpleGraph/Extremal/ErdosStoneSimonovits.lean |
2 |
13 |
['SnirBroshi', 'github-actions', 'grunweg', 'mitchell-horner'] |
nobody |
12-77391 12 days ago |
13-57844 13 days ago |
13-63994 13 days |
0 |
| 37298 |
artie2000 author:artie2000 |
refactor(Algebra/Order): unbundle group and ring cone |
* Unbundle `GroupCone` and `RingCone` using `Submonoid.IsMulPointed`
This PR deprecates the [GroupCone](https://leanprover-community.github.io/mathlib4_docs/Mathlib/Algebra/Order/Group/Cone.html#GroupCone) and [RingCone](https://leanprover-community.github.io/mathlib4_docs/Mathlib/Algebra/Order/Ring/Cone.html#RingCone) structures, making use of the predicates `Submonoid.IsMulPointed` and `AddSubmonoid.IsPointed` defined in that file instead.
These predicates allow us to treat uniformly
* positive cones in groups and rings
* pointed cones in vector spaces over an ordered field
* orderings in rings
This reduces duplication of theorems.
Unbundling group and ring cones is further justified by the principle that there are no new operations on them: they correspond to operations on the underlying submonoids and subsemirings, respectively. See the discussion at https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/When.20should.20subobjects.20be.20bundled.3F/with/609099816
See also #36863 for the analogous change to ring orderings.
---
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|
t-algebra
large-import
increases-technical-debt
maintainer-merge
label:t-algebra$ |
127/29 |
Mathlib/Algebra/Group/Submonoid/Support.lean,Mathlib/Algebra/Order/Group/Cone.lean,Mathlib/Algebra/Order/Ring/Cone.lean |
3 |
37 |
['Vierkantor', 'YaelDillies', 'artie2000', 'github-actions', 'joneugster', 'mathlib-merge-conflicts'] |
nobody |
12-18524 12 days ago |
12-19888 12 days ago |
74-38733 74 days |
1 |
| 44060 |
wwylele author:wwylele |
feat(Geometry/Euclidean): lemma about excenters and volumes |
This proves that volume = inradius * surface / n
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[](https://gitpod.io/from-referrer/)
|
t-euclidean-geometry
maintainer-merge
|
112/0 |
Mathlib.lean,Mathlib/Geometry/Euclidean/Volume/Incenter.lean |
2 |
8 |
['SnirBroshi', 'copilot-pull-request-reviewer', 'github-actions', 'jsm28', 'wwylele'] |
jsm28 assignee:jsm28 |
12-1264 12 days ago |
18-73739 18 days ago |
18-73709 18 days |
2 |
| 41505 |
homeowmorphism author:homeowmorphism |
feat(Algebra/Order): define left-orderable monoids and left-orderable groups |
A monoid `M` is *left-orderable* if it admits a linear order invariant under left multiplication
(`a ≤ b → c * a ≤ c * b`), *right-orderable* if it admits one invariant under right multiplication,
and *bi-orderable* if a single order is invariant under both — stronger than being both left- and
right-orderable, since those may need different orders. Moreover, these order becomes strict if the monoid is cancellative. This file defines the `Prop`-valued classes
`IsLeftOrderable`, `IsRightOrderable` and `IsBiOrderable`, and the instances producing them from a
compatible `LinearOrder`. Their richer theory over a *group*, where the two one-sided notions
coincide, is developed in `Mathlib/GroupTheory/Orderable.lean`.
Building on the monoid-level classes `IsLeftOrderable`, `IsRightOrderable` and `IsBiOrderable` (see
`Mathlib/Algebra/Order/Monoid/Orderable.lean`), adds the theory specific to a group `G`,
where inverses make the left- and right-handed notions coincide.
Co-authored by: Yaël Dillies <yael.dillies@gmail.com>
---
Zulip thread: https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/Dynamical.20realization.20of.20left-orderable.20groups.20project/
Authored using Claude Fable during the Fermat’s Last Theorem workshop in July 2026.
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|
LLM-generated
t-group-theory
maintainer-merge
merge-conflict
|
473/1 |
Mathlib.lean,Mathlib/Algebra/Order/Group/Opposite.lean,Mathlib/Algebra/Order/Group/PiLex.lean,Mathlib/Algebra/Order/Monoid/Orderable/Defs.lean,Mathlib/Algebra/Order/Monoid/Orderable/Pi.lean,Mathlib/Algebra/Order/Monoid/Orderable/Prod.lean,Mathlib/Algebra/Order/Monoid/Prod.lean,Mathlib/Tactic/Translate/ToAdditive.lean |
8 |
106 |
['JovanGerb', 'YaelDillies', 'github-actions', 'homeowmorphism', 'mathlib-merge-conflicts', 'tb65536'] |
nobody |
10-24814 10 days ago |
10-24815 10 days ago |
37-59381 37 days |
0 |
| 41338 |
kim-em author:kim-em |
refactor(Combinatorics/SimpleGraph/CycleGraph): golf cycleGraph_isContained_iff via getVert |
Reopened from my fork, replacing #41268 (previously a branch on the main repo).
This PR rewrites the reverse direction of `cycleGraph_isContained_iff` from https://github.com/leanprover-community/mathlib4/pull/35255. Building the copy on `Walk.getVert` instead of `support` indexing makes the vertex map total, dispatches both adjacency cases through a single cyclic-successor helper (no `wlog`), handles the wraparound with `adj_penultimate`, and gets injectivity directly from `IsCycle.getVert_injOn'`.
🤖 Prepared with Claude Code |
t-combinatorics
LLM-generated
maintainer-merge
|
12/16 |
Mathlib/Combinatorics/SimpleGraph/CycleGraph.lean |
1 |
18 |
['SnirBroshi', 'github-actions', 'kim-em', 'mathlib-merge-conflicts', 'vlad902'] |
nobody |
9-65346 9 days ago |
40-64866 40 days ago |
59-21514 59 days |
0 |
| 44235 |
SnirBroshi author:SnirBroshi |
doc(1000-yaml): fill in a few Euclidean geometry items we have |
CPCTC ("Corresponding Parts of Congruent Triangles are Congruent") is from #26758 which was adopted from leanprover-community/mathlib3#18214, and intersecting chords/secants theorem is from leanprover-community/mathlib3#7139.
---
CPCTC ([PR](https://github.com/leanprover-community/mathlib4/pull/26758/changes), [original PR](https://github.com/leanprover-community/mathlib3/pull/18214/changes)) ([Wikipedia](https://en.wikipedia.org/wiki/Congruence_(geometry)#CPCTC)):
- [`EuclideanGeometry.triangle_congruent_iff_dist_eq`](https://leanprover-community.github.io/mathlib4_docs/Mathlib/Geometry/Euclidean/Congruence.html#EuclideanGeometry.triangle_congruent_iff_dist_eq) (this is almost a definitional theorem, except [`Congruent`](https://leanprover-community.github.io/mathlib4_docs/Mathlib/Topology/MetricSpace/Congruence.html#Congruent) is defined using `edist` and the theorem uses `dist`)
- [`EuclideanGeometry.angle_eq_of_congruent`](https://leanprover-community.github.io/mathlib4_docs/Mathlib/Geometry/Euclidean/Congruence.html#EuclideanGeometry.angle_eq_of_congruent) (for any amount of points, not just for triangles)
Intersecting secants theorem ([PR](https://github.com/leanprover-community/mathlib3/pull/7139/changes)) ([Wikipedia](https://en.wikipedia.org/wiki/Intersecting_secants_theorem)):
- [`EuclideanGeometry.mul_dist_eq_mul_dist_of_cospherical_of_angle_eq_zero`](https://leanprover-community.github.io/mathlib4_docs/Mathlib/Geometry/Euclidean/Sphere/Power.html#EuclideanGeometry.mul_dist_eq_mul_dist_of_cospherical_of_angle_eq_zero)
Intersecting chords theorem (same [PR](https://github.com/leanprover-community/mathlib3/pull/7139/changes)) ([Wikipedia](https://en.wikipedia.org/wiki/Intersecting_chords_theorem)):
- [`EuclideanGeometry.mul_dist_eq_mul_dist_of_cospherical_of_angle_eq_pi`](https://leanprover-community.github.io/mathlib4_docs/Mathlib/Geometry/Euclidean/Sphere/Power.html#EuclideanGeometry.mul_dist_eq_mul_dist_of_cospherical_of_angle_eq_pi)
---
btw perhaps CPCTC should use [`Polygon`](https://leanprover-community.github.io/mathlib4_docs/Mathlib/Geometry/Polygon/Basic.html#Polygon)?
And should the intersecting secants/chords theorems use [`Collinear`](https://leanprover-community.github.io/mathlib4_docs/Mathlib/LinearAlgebra/AffineSpace/FiniteDimensional.html#Collinear) & [`Wbtw`](https://leanprover-community.github.io/mathlib4_docs/Mathlib/Analysis/Convex/Between.html#Wbtw) instead of `angle .. = 0`/`π`?
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|
documentation
t-euclidean-geometry
maintainer-merge
|
10/0 |
docs/1000.yaml |
1 |
2 |
['github-actions', 'joneugster'] |
nobody |
8-20402 8 days ago |
14-14719 14 days ago |
14-14689 14 days |
0 |
| 44379 |
JokerXin2025 author:JokerXin2025 |
fix(tactic): skip implementation-detail declarations in `specialize_all` |
This commit fixes a bug in the `specialize_all` tactic that causes incorrect behavior in `specialize_all; assumption`.
In the original implementation of `specialize_all`, the statement `for h in ← getLCtx do` iterates over the entire local context without filtering out auxiliary declarations, particularly the theorem currently being proved. This allows the subsequent `assumption` tactic to directly use the local hypothesis produced by specializing that declaration, recursively “proving” the current theorem. This issue makes `tauto_set` unusable in many cases where it successfully executes `specialize_all` internally.
Here are some examples of the bug in `specialize_all` (before the fix):
```lean
import Mathlib.Tactic.TautoSet
/-- error: fail to show termination for
_example
with errors
failed to infer structural recursion:
Cannot use parameter x:
failed to eliminate recursive application
_example x✝ rfl -/
#guard_msgs (substring := true) in
example (x : ℕ) : {x} ⊆ Set.univ := by tauto_set
/-- error: fail to show termination for
_example -/
#guard_msgs (substring := true) in
example {α : Type} : α → False := by
intro x
specialize_all x
assumption
```
This issue does not cause Lean to accept the invalid proof, because it is rejected by the termination checker.
I fixed this issue by adding
```lean
unless h.isImplementationDetail do
```
after the loop statement above to filter out all implementation-detail hypotheses, including the auxiliary declaration for the current theorem. I also added three regression tests in `MathlibTest/Tactic/TautoSet.lean`. All three compile successfully now, but fail with `error: fail to show termination for ...` before the fix.
GPT-6-Astra was used to help locate the bug and translate the PR description to English.
---
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|
t-meta
new-contributor
maintainer-merge
|
21/2 |
Mathlib/Tactic/TautoSet.lean,MathlibTest/Tactic/TautoSet.lean |
2 |
11 |
['JokerXin2025', 'JovanGerb', 'github-actions', 'grunweg', 'plp127'] |
nobody |
8-8844 8 days ago |
8-49790 8 days ago |
9-323 9 days |
0 |
| 43745 |
theebayuser author:theebayuser |
feat(Geometry/Euclidean): add Euler's quadrilateral theorem |
Adds Euler's quadrilateral theorem to Mathlib/Geometry/Euclidean/, and records it in docs/1000.yaml (Q18630480). It states: for any four points, the sum of the squares of the four sides of the quadrilateral a b c d equals the sum of the squares of the two diagonals, plus four times the square of the distance between the midpoints of the diagonals.
This PR was written with AI assistance (Claude Code).
|
t-euclidean-geometry
new-contributor
LLM-generated
maintainer-merge
|
84/0 |
Mathlib.lean,Mathlib/Analysis/InnerProductSpace/Basic.lean,Mathlib/Geometry/Euclidean/EulerQuadrilateral.lean,docs/1000.yaml |
4 |
17 |
['github-actions', 'jsm28', 'theebayuser', 'wwylele'] |
nobody |
6-76976 6 days ago |
28-66461 28 days ago |
28-66431 28 days |
0 |
| 41696 |
vaca22 author:vaca22 |
feat(RingTheory): generalize relNorm_eq_pow_of_isMaximal to separable fraction field extensions |
Generalize `Ideal.relNorm_eq_pow_of_isMaximal` from `[PerfectField (FractionRing R)]` to `[Algebra.IsSeparable (FractionRing R) (FractionRing S)]`, covering e.g. function fields with imperfect constant fields.
Supporting additions:
- `IntermediateField.normalClosure.isSeparable`: the normal closure of a separable extension is separable.
- `IsGalois.normalClosure_of_isSeparable`: for `K/k` separable and `F/k` normal, `normalClosure k K F` is Galois over `k`.
AI disclosure: LLM tools were used for drafting code; I have reviewed and can explain all changes.
|
new-contributor
t-ring-theory
LLM-generated
maintainer-merge
|
20/3 |
Mathlib/FieldTheory/Galois/Basic.lean,Mathlib/FieldTheory/SeparableClosure.lean,Mathlib/RingTheory/Ideal/Norm/RelNorm.lean,Mathlib/RingTheory/NormalClosure.lean |
4 |
34 |
['felixpernegger', 'github-actions', 'leanprover-radar', 'tb65536', 'vaca22', 'xroblot'] |
nobody |
6-51343 6 days ago |
6-62741 6 days ago |
81-43576 81 days |
0 |
| 40728 |
Formalistic03 author:Formalistic03 |
feat(Combinatorics/SimpleGraph/Hasse): more properties of Hasse graphs of linear orders |
- two forms of an intermediate value theorem for linear orders
- the Hasse graph of a linear order is acyclic
- a path graph is locally finite
---
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[](https://gitpod.io/from-referrer/)
|
new-contributor
t-combinatorics
maintainer-merge
|
85/17 |
Mathlib/Combinatorics/SimpleGraph/Acyclic.lean,Mathlib/Combinatorics/SimpleGraph/CycleGraph.lean,Mathlib/Combinatorics/SimpleGraph/Hasse.lean,Mathlib/Data/Fintype/Defs.lean,Mathlib/Order/Cover.lean |
5 |
63 |
['Formalistic03', 'Multramate', 'SnirBroshi', 'b-mehta', 'github-actions', 'mathlib-merge-conflicts'] |
b-mehta assignee:b-mehta |
6-10350 6 days ago |
8-24814 8 days ago |
106-26313 106 days |
0 |
| 43964 |
benpigchu author:benpigchu |
feat(Geometry/Euclidean): theorems to prove line parallel from relation between oangles |
We have `EuclideanGeometry.two_zsmul_oangle_of_parallel` to derive relationship of oangles from parallel lines, but we do not have theorems to prove parallel of lines from relationship of oangles. This PR add theorems for that, and their iff version.
---
[](https://gitpod.io/from-referrer/) |
t-euclidean-geometry
new-contributor
maintainer-merge
|
110/0 |
Mathlib/Geometry/Euclidean/Angle/Oriented/Affine.lean,Mathlib/Geometry/Euclidean/Angle/Oriented/Basic.lean |
2 |
4 |
['github-actions', 'jsm28'] |
jsm28 assignee:jsm28 |
5-49907 5 days ago |
21-37356 21 days ago |
21-37326 21 days |
0 |
| 41220 |
wwylele author:wwylele |
feat(Geometry/Euclidean): two formula for area of a triangle |
This PR proves two basic formulas for triangle area: `s = 1/2 * h * b = 1/2 * a * b * sin C`
---
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- [ ] depends on #37910
[](https://gitpod.io/from-referrer/)
|
t-euclidean-geometry
maintainer-merge
|
108/0 |
Mathlib.lean,Mathlib/Geometry/Euclidean/Angle/Unoriented/Affine.lean,Mathlib/Geometry/Euclidean/Angle/Unoriented/Projection.lean,Mathlib/Geometry/Euclidean/Triangle.lean,Mathlib/Geometry/Euclidean/Volume/Triangle.lean |
5 |
19 |
['SnirBroshi', 'copilot-pull-request-reviewer', 'github-actions', 'jsm28', 'mathlib-bors', 'mathlib-merge-conflicts', 'wwylele'] |
jsm28 assignee:jsm28 |
5-11239 5 days ago |
5-12008 5 days ago |
18-71284 18 days |
3 |
| 40967 |
Formalistic03 author:Formalistic03 |
feat(Combinatorics/SimpleGraph/Paths): some lemmas about inducing walks |
Could also be done via `SimpleGraph.Walk.map_induce`, but I thought that doing it directly is not much worse.
---
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[](https://gitpod.io/from-referrer/)
|
new-contributor
t-combinatorics
maintainer-merge
|
59/0 |
Mathlib/Combinatorics/SimpleGraph/Paths.lean,Mathlib/Combinatorics/SimpleGraph/Walk/Maps.lean,Mathlib/Data/List/Nodup.lean,Mathlib/Data/Sym/Sym2.lean |
4 |
34 |
['Formalistic03', 'SnirBroshi', 'github-actions'] |
b-mehta assignee:b-mehta |
5-731 5 days ago |
6-9948 6 days ago |
99-23645 99 days |
0 |
| 43910 |
vlad902 author:vlad902 |
feat(AffineSpace): exists affinely independent set of a cardinality dim + 1 |
Currently, `exists_affineIndependent` establishes for any set `s` that there exists a subset with equal affine span that is affinely indepedent. Further refine that statement to show that for finite dimensional spaces that this set always has cardinality equal to the affine dimension + 1.
---
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|
t-algebra
maintainer-merge
label:t-algebra$ |
38/0 |
Mathlib/LinearAlgebra/AffineSpace/FiniteDimensional.lean,Mathlib/LinearAlgebra/AffineSpace/Independent.lean |
2 |
9 |
['YaelDillies', 'github-actions', 'mathlib-merge-conflicts', 'vlad902'] |
nobody |
4-65459 4 days ago |
12-31146 12 days ago |
22-59944 22 days |
0 |
| 37730 |
RemyDegenne author:RemyDegenne |
feat: define total variation distance |
Define the total variation distance between two finite measures, using the variation of the difference seen as signed measures.
---
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|
t-measure-probability
maintainer-merge
|
572/2 |
Mathlib.lean,Mathlib/MeasureTheory/Integral/Bochner/Basic.lean,Mathlib/MeasureTheory/Measure/Decomposition/Lebesgue.lean,Mathlib/MeasureTheory/Measure/MutuallySingular.lean,Mathlib/MeasureTheory/Measure/TotalVariation/Basic.lean,Mathlib/MeasureTheory/Measure/TotalVariation/Defs.lean,Mathlib/MeasureTheory/Measure/WithDensity.lean,Mathlib/MeasureTheory/VectorMeasure/Operations.lean,Mathlib/MeasureTheory/VectorMeasure/TotalVariation.lean |
9 |
49 |
['DavidLedvinka', 'EtienneC30', 'RemyDegenne', 'github-actions', 'kex-y', 'mathlib-merge-conflicts'] |
EtienneC30 assignee:EtienneC30 |
4-26910 4 days ago |
5-36018 5 days ago |
68-26420 68 days |
0 |
| 26479 |
thefundamentaltheor3m author:thefundamentaltheor3m |
feat(Analysis/Complex/CauchyIntegral): Cauchy–Goursat for Unbounded Rectangles |
In this PR, we prove versions of the Cauchy-Goursat theorem where the contours in question are rectangular and unbounded (ie, where the contours look like the $\bigsqcup$ symbol). I am not sure if I have formalised these in the best way, or if `Analysis.Complex.CauchyIntegral` is the best place for them (it might be prudent to reorganise the file into multiple files at some point), but I believe this is a useful result. Suggestions welcome.
---
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[](https://gitpod.io/from-referrer/)
|
new-contributor
t-analysis
sphere-packing
maintainer-merge
|
169/0 |
Mathlib/Analysis/Complex/CauchyIntegral.lean |
1 |
53 |
['github-actions', 'j-loreaux', 'loefflerd', 'mathlib-splicebot', 'mathlib4-merge-conflict-bot', 'ocfnash', 'thefundamentaltheor3m', 'themathqueen', 'wwylele'] |
j-loreaux assignee:j-loreaux |
3-68415 3 days ago |
9-78597 9 days ago |
137-71473 137 days |
0 |
| 44042 |
ooovi author:ooovi |
feat(LinearAlgebra/AffineSubspace): define the range of an `AffineMap` |
This PR adds the range of affine maps and provides some API, following `LinearMap.range`.
AI disclosure: I used LLMs for library search and code review.
---
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[](https://gitpod.io/from-referrer/)
|
t-algebra
t-convex-geometry
maintainer-merge
label:t-algebra$ |
97/0 |
Mathlib.lean,Mathlib/LinearAlgebra/AffineSpace/AffineMap.lean,Mathlib/LinearAlgebra/AffineSpace/AffineSubspace/Range.lean |
3 |
11 |
['YaelDillies', 'gasparattila', 'github-actions'] |
nobody |
3-47763 3 days ago |
3-47763 3 days ago |
12-1440 12 days |
1 |
| 44518 |
NirvanaC93 author:NirvanaC93 |
feat(Topology/Algebra/Group/Units): product and units commute, and the units in products of topological monoids with open units are open (see also Topology/Algebra/IsOpenUnits) |
Co-authored-by: María Inés de Frutos-Fernández <88536493+mariainesdff@users.noreply.github.com>
---
In the ongoing formalization of Hasse-Minkowski Theorem on quadratic forms, we need the following:
Changes in Topology/Algebra/Group/Units:
```theorem ContinuousMulEquiv.piUnits_isOpenEmbedding```: Given a family of topological monoids M_i, (Π M_i)ˣ → Π M_i is an open embedding.
```def ContinuousMulEquiv.prodUnits```: The isomorphism of topological groups between the units of a product of two groups and the product of the units. This has an additive counterpart, ```ContinuousAddEquiv.sumAddUnits```.
```theorem ContinuousMulEquiv.prodUnits_isOpenEmbedding```: Given two topological monoids M and N, (M × N)ˣ → M × N is an open embedding.
And two simp lemmas: ContinuousMulEquiv.toMulEquiv_prodUnits and ContinuousMulEquiv.toHomeomorph_prodUnits
Changes is Topology/Algebra/IsOpenUnits:
Added the two instances that units in a product of two (or finitely many) topological monoids are open. |
t-topology
new-contributor
t-algebra
maintainer-merge
label:t-algebra$ |
61/5 |
Mathlib/Topology/Algebra/Group/Units.lean,Mathlib/Topology/Algebra/IsOpenUnits.lean |
2 |
41 |
['NirvanaC93', 'github-actions', 'j-loreaux', 'themathqueen'] |
nobody |
3-33268 3 days ago |
3-33268 3 days ago |
3-64235 3 days |
0 |
| 43792 |
justus-springer author:justus-springer |
chore(Algebra/Group/Pointwise/Set/SelfInv): put into lemmas into Set namespace |
Move all lemmas about self inverse sets into the `Set` namespace. This was suggested by @eric-wieser in #42611. Dot-notation is still accessible using the [DNRO](https://juliahimmel.de/blog/an-underappreciated-lean-feature/) feature.
`to_additive` needs a hint in order to translate into the correct namespace. I also fixed the to_additive of `IsSelfInv.prod` (this used to be translated to `IsSelfInv.sum` instead of `IsSelfNeg.prod`.
---
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t-algebra
maintainer-merge
label:t-algebra$ |
8/1 |
Mathlib/Algebra/Group/Pointwise/Set/SelfInv.lean |
1 |
6 |
['eric-wieser', 'github-actions', 'justus-springer', 'tb65536'] |
nobody |
3-32825 3 days ago |
26-49583 26 days ago |
26-49615 26 days |
2 |
| 43877 |
gloges author:gloges |
feat(LinearAlgeabra/MultilinearMap): notation for `MultilinearMap` |
Introduces the notation `M →ₗₘ[R] N` for `MultilinearMap R M N`, mirroring the notation `M →ₗ[R] N` for `LinearMap R M N`.
Closes #43855.
---
#42534 generalizes `MultilinearMap` to be semilinear and adds additional notation on top of this.
---
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new-contributor
t-algebra
maintainer-merge
label:t-algebra$ |
336/386 |
Mathlib/Analysis/Calculus/ContDiff/FaaDiBruno.lean,Mathlib/Analysis/Normed/Module/Multilinear/Basic.lean,Mathlib/Analysis/Normed/Module/Multilinear/Curry.lean,Mathlib/LinearAlgebra/Alternating/Basic.lean,Mathlib/LinearAlgebra/Alternating/DomCoprod.lean,Mathlib/LinearAlgebra/Multilinear/Basic.lean,Mathlib/LinearAlgebra/Multilinear/Basis.lean,Mathlib/LinearAlgebra/Multilinear/Curry.lean,Mathlib/LinearAlgebra/Multilinear/DFinsupp.lean,Mathlib/LinearAlgebra/Multilinear/DirectSum.lean,Mathlib/LinearAlgebra/Multilinear/FiniteDimensional.lean,Mathlib/LinearAlgebra/Multilinear/Finsupp.lean,Mathlib/LinearAlgebra/Multilinear/Pi.lean,Mathlib/LinearAlgebra/Multilinear/TensorProduct.lean,Mathlib/LinearAlgebra/PiTensorProduct/Basic.lean,Mathlib/LinearAlgebra/PiTensorProduct/Generators.lean,Mathlib/LinearAlgebra/TensorAlgebra/Basic.lean,Mathlib/LinearAlgebra/TensorPower/Pairing.lean,Mathlib/LinearAlgebra/TensorPower/Symmetric.lean,Mathlib/RingTheory/PiTensorProduct.lean,Mathlib/Topology/Algebra/Module/Multilinear/Basic.lean |
21 |
26 |
['github-actions', 'gloges', 'mathlib-merge-conflicts', 'themathqueen'] |
nobody |
3-13165 3 days ago |
3-15701 3 days ago |
5-29259 5 days |
3 |
| 44465 |
ishanrk author:ishanrk |
fix: handle nested conditionals in to_dual |
Before this PR, `@[to_dual]` failed with `function expected` on `nested_max` (the theorem in the issue above)
The problem was that `updateDecl` added helper functions to the `nested_max` proof (making the comparison functions' inputs explicit), but checked the modified proof against the original `nested_max` statement (which doesn't have these helpers). The nested comparison in the original statement also needed those helpers for Lean to recognise the function's inputs.
Fixes #42852. |
t-meta
new-contributor
maintainer-merge
|
25/5 |
Mathlib/Tactic/Translate/Core.lean,MathlibTest/Attribute/ToDual.lean |
2 |
9 |
['JovanGerb', 'github-actions', 'grunweg', 'ishanrk'] |
nobody |
3-3699 3 days ago |
3-4301 3 days ago |
6-47086 6 days |
0 |
| 40204 |
Jun2M author:Jun2M |
feat(Combinatorics/HypergraphLike): add HypergraphLike class |
Introduces `HypergraphLike V I E Gr`, an incidence interface for developing common graph theory across graph and hypergraph representations, including `SimpleGraph`, `Graph`, and `Digraph`.
The class specifies sets of vertices, edges, and incidences within ambient label types, with maps assigning each incidence an edge and a vertex. Each incidence is a source, a target, or both, allowing directed and undirected incidences in the same structure. Distinct incidences may belong to the same vertex and edge.
`Link G e u v` records two distinct incidences witnessing a traversal of `e` from `u` to `v`. Requiring distinct incidences prevents traversing an undirected edge back through the incidence used to enter it. `IsLink` expresses the existence of a link, and `Adj` the existence of an edge linking two vertices.
The basic API includes the incidence maps `attach` and `edgeMap`, the fibers `edgeFiber` and `vertexFiber`, and the sets `incVerts` and `incEdges` of incident vertices and edges. It provides membership characterizations, fiber disjointness and union identities, and their relationships with links and adjacency.
Related: #36743 and the [HasAdj discussion](https://leanprover.zulipchat.com/#narrow/channel/252551-graph-theory/topic/HasAdj/with/575843445).
Codex assisted with the initial implementation and review, and revised by me.
Co-authored-by: OpenAI Codex <codex@openai.com>
---
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t-combinatorics
LLM-generated
maintainer-merge
|
453/0 |
Mathlib.lean,Mathlib/Combinatorics/HypergraphLike/Basic.lean |
2 |
43 |
['Jun2M', 'SnirBroshi', 'YaelDillies', 'copilot-pull-request-reviewer', 'github-actions', 'tb65536'] |
nobody |
2-72892 2 days ago |
4-66039 4 days ago |
99-14311 99 days |
9 |
| 42704 |
gasparattila author:gasparattila |
refactor(Algebra): make the arguments of `Is*Apply` implicit |
Since `IsAddApply F α β` and similar classes have `[FunLike F α β]` as an assumption, `α` and `β` can always be inferred from `F`, so they can be made implicit.
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t-algebra
maintainer-merge
label:t-algebra$ |
280/280 |
Mathlib/Algebra/BigOperators/Pi.lean,Mathlib/Algebra/Group/FunLike.lean,Mathlib/Algebra/Group/IsApply.lean,Mathlib/Algebra/GroupWithZero/FunLike.lean,Mathlib/Algebra/Lie/Basic.lean,Mathlib/Algebra/Lie/Weights/Basic.lean,Mathlib/Algebra/Module/FunLike.lean,Mathlib/Algebra/Order/Group/End.lean,Mathlib/Algebra/Order/Module/PositiveLinearMap.lean,Mathlib/Algebra/Ring/FunLike.lean,Mathlib/Analysis/BoxIntegral/Partition/Additive.lean,Mathlib/Analysis/Distribution/ContDiffMapSupportedIn.lean,Mathlib/Analysis/Distribution/SchwartzSpace/Basic.lean,Mathlib/Analysis/Distribution/TestFunction.lean,Mathlib/Analysis/Normed/Group/Seminorm.lean,Mathlib/Analysis/Normed/Module/Seminorm/Basic.lean,Mathlib/Geometry/Convex/AffineMap/Module.lean,Mathlib/LinearAlgebra/Alternating/Basic.lean,Mathlib/LinearAlgebra/Multilinear/Basic.lean,Mathlib/LinearAlgebra/QuadraticForm/Basic.lean,Mathlib/MeasureTheory/OuterMeasure/Operations.lean,Mathlib/MeasureTheory/VectorMeasure/Basic.lean,Mathlib/NumberTheory/ModularForms/Basic.lean,Mathlib/NumberTheory/ModularForms/NormTrace.lean,Mathlib/NumberTheory/ModularForms/SlashInvariantForms.lean,Mathlib/NumberTheory/Padics/Measure/Basic.lean,Mathlib/Probability/Kernel/Defs.lean,Mathlib/RingTheory/Derivation/Basic.lean,Mathlib/Topology/Algebra/InfiniteSum/ContinuousEval.lean,Mathlib/Topology/Algebra/Module/ContinuousLinearMap/Basic.lean,Mathlib/Topology/Algebra/Module/ContinuousLinearMap/Positive.lean,Mathlib/Topology/Algebra/Module/Multilinear/Basic.lean,Mathlib/Topology/Algebra/Module/Spaces/UniformConvergenceCLM.lean |
33 |
9 |
['gasparattila', 'github-actions', 'mathlib-merge-conflicts', 'mcdoll'] |
joneugster assignee:joneugster |
2-40417 2 days ago |
3-13417 3 days ago |
53-44000 53 days |
0 |
| 44425 |
JovanGerb author:JovanGerb |
chore: deprecate `FP.Float` |
This PR deprecates `FP.Float`. This definition is very poorly documented, has not been touched since the port, and says it is experimental. Nowadays, lean core has a `Float` type with the ability to prove things about it, so I think it's better to remove `FP.Float`.
This PR is motivated by a new concrete instances linter. The parameter `[C : FloatCfg]` appearing in this file causes this linter to warn.
---
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t-data
increases-technical-debt
maintainer-merge
|
37/31 |
Mathlib/Algebra/Order/Interval/Basic.lean,Mathlib/Data/FP/Basic.lean |
2 |
3 |
['github-actions', 'grunweg'] |
nobody |
2-26878 2 days ago |
8-31717 8 days ago |
8-31687 8 days |
1 |
| 44033 |
kim-em author:kim-em |
chore(ci): explain and link the weekly linting report, with message locations |
This PR makes the weekly linting report posted to Zulip explain itself: the message now says it is `lake build` with the `linter.weeklyLintSet` linters enabled, and links to the linter set, this workflow and the reporting script at the commit that was built. Messages occurring at most twice list their locations, linked to the source, tables are capped at 20 rows so the message stays under Zulip's limit (this week's post was truncated), and a full report with every location goes to the GitHub job summary.
All of this needs https://github.com/leanprover-community/mathlib-ci/pull/77 and the automatic bump of the pinned mathlib-ci ref; until then the extra variables are ignored and the report is unchanged.
- [ ] depends on: https://github.com/leanprover-community/mathlib-ci/pull/77
🤖 Prepared with Claude Code
|
CI
blocked-by-other-PR
maintainer-merge
|
11/4 |
.github/workflows/weekly-lints.yml |
1 |
5 |
['github-actions', 'joneugster', 'mathlib-dependent-issues'] |
joneugster assignee:joneugster |
1-48440 1 day ago |
8-53264 8 days ago |
6-42084 6 days |
0 |
| 37907 |
grunweg author:grunweg |
feat(by_contra,contrapose): warn if the push_neg step does nothing |
---
- [x] depends on: #31597
- [x] depends on: #37899
- [x] depends on: #37937
- [x] depends on: #37999
- [x] depends on: #38008
- [x] depends on: #43999
- [x] depends on: #44084
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t-meta
tech debt
maintainer-merge
|
64/15 |
Mathlib/Data/Set/Card.lean,Mathlib/FieldTheory/IntermediateField/Adjoin/Basic.lean,Mathlib/MeasureTheory/Function/LpSeminorm/SMul.lean,Mathlib/Tactic/ByCases.lean,Mathlib/Tactic/ByContra.lean,Mathlib/Tactic/Contrapose.lean,Mathlib/Tactic/Order.lean,MathlibTest/Tactic/ByContra.lean,MathlibTest/Tactic/Contrapose.lean,MathlibTest/Tactic/Order.lean |
10 |
15 |
['JovanGerb', 'SnirBroshi', 'github-actions', 'grunweg', 'joneugster', 'mathlib-dependent-issues', 'mathlib-merge-conflicts'] |
joneugster assignee:joneugster |
1-48278 1 day ago |
3-43330 3 days ago |
17-12172 17 days |
0 |
| 44622 |
grunweg author:grunweg |
chore(MathlibTest/Linter/DupNamespace): use the module system |
Because this is a good practice in general.
---
- [x] depends on: #44621
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easy
maintainer-merge
|
7/2 |
MathlibTest/Linter/DupNamespace.lean |
1 |
10 |
['JovanGerb', 'SnirBroshi', 'github-actions', 'grunweg', 'mathlib-dependent-issues'] |
nobody |
1-44215 1 day ago |
2-20978 2 days ago |
2-21008 2 days |
0 |
| 42538 |
NoahW314 author:NoahW314 |
feat: add Semilattice lemmas for `IsBotOneClass` |
These lemmas are analogous to the existing lemmas for `LinearOrder` + `IsBotOneClass`. The bot versions for Semilattices and LinearOrder also exist already.
---
<!-- Your PR title will become the first line of the commit message.
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-->
[](https://gitpod.io/from-referrer/)
|
t-algebra
maintainer-merge
label:t-algebra$ |
32/8 |
Mathlib/Algebra/Order/IsBotOne.lean |
1 |
5 |
['NoahW314', 'github-actions', 'themathqueen'] |
nobody |
1-40746 1 day ago |
1-75198 1 day ago |
60-70169 60 days |
0 |
| 43981 |
plp127 author:plp127 |
fix: setting `pp.mdata` to true breaks `@[pp_with_univ]` |
This PR fixes an issue where turning on `pp.mdata` causes constants tagged with `@[pp_with_univ]` to print as
```
[mdata pp.universes:true]
[mdata pp.universes:true]
[mdata pp.universes:true]
[mdata pp.universes:true]
[mdata pp.universes:true]
[mdata pp.universes:true] [mdata pp.universes:true] [mdata pp.universes:true] [mdata pp.universes:true] ⋯
```
When `pp.mdata` is set to true, expressions with mdata are printed by first printing the mdata and the printing the bare expression underneath. This breaks `@[pp_with_univ]` which works by applying mdata setting `pp.universes` to true onto the constant name, and then redelaborating the new expression containing mdata. This causes an infinite loop the the delaborator since `@[pp_with_univ]` applies the mdata, and then since `pp.mdata` is true the mdata is removed before delaborating the constant, which then has mdata applied again, and so on. We fix the issue by instead having the implementation of `@[pp_with_univ]` directly set the `pp.universes` option, instead of delegating it to `delabMData` with a metadata.
---
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Moves:
- Vector.* -> List.Vector.*
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- Nat.bit1_add_bit1
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below the `---`, and placed outside this HTML comment, or else they
will be invisible to reviewers.
If this PR depends on other PRs, please list them below this comment,
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- [ ] depends on: #xyz [optional extra text]
-->
[](https://gitpod.io/from-referrer/)
|
t-meta
maintainer-merge
|
63/6 |
Mathlib/Tactic/PPWithUniv.lean,MathlibTest/Delab/PPWithUniv.lean |
2 |
10 |
['JovanGerb', 'github-actions', 'joneugster', 'plp127'] |
joneugster assignee:joneugster |
1-40607 1 day ago |
1-44507 1 day ago |
16-3023 16 days |
0 |
| 44660 |
jessealama author:jessealama |
feat(Combinatorics/SimpleGraph/Hamiltonian): close a Hamiltonian path into a Hamiltonian cycle |
Add `SimpleGraph.Walk.isHamiltonianCycle_cons`: closing a path `p` from `b` to `a` with an edge `a ~ b` gives a Hamiltonian cycle if and only if `p` is a Hamiltonian path that does not already use that edge.
This is the Hamiltonian analogue of `Walk.cons_isCycle_iff`. It was originally extracted at @YaelDillies's suggestion during review of #36376, which no longer needs it.
|
t-combinatorics
maintainer-merge
|
6/0 |
Mathlib/Combinatorics/SimpleGraph/Hamiltonian.lean |
1 |
5 |
['SnirBroshi', 'github-actions'] |
nobody |
1-39924 1 day ago |
1-39975 1 day ago |
1-41013 1 day |
0 |
| 44321 |
mcdoll author:mcdoll |
chore(Analysis/Normed): generalize `ContinuousMultilinearMap.curry0` to TVS |
Move and generalize the definition and basic properties of `curry0` and `uncurry0` to topological space. Needed to generalize iterated derivatives to TVS.
---
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any "Co-authored-by" lines) using the following format:
Moves:
- Vector.* -> List.Vector.*
- ...
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- Nat.bit1_add_bit1
- ...
Any other comments you want to keep out of the PR commit should go
below the `---`, and placed outside this HTML comment, or else they
will be invisible to reviewers.
If this PR depends on other PRs, please list them below this comment,
using the following format:
- [ ] depends on: #abc [optional extra text]
- [ ] depends on: #xyz [optional extra text]
-->
|
t-analysis
maintainer-merge
|
29/37 |
Mathlib/Analysis/Normed/Module/Multilinear/Curry.lean,Mathlib/Topology/Algebra/Module/Multilinear/Basic.lean |
2 |
3 |
['github-actions', 'themathqueen'] |
nobody |
1-38942 1 day ago |
2-3013 2 days ago |
11-16343 11 days |
0 |
| 44368 |
emlis42 author:emlis42 |
feat: implement OEIS attribute |
This PR implements OEIS attribute. This allows users to link Mathlib declarations to OEIS entries.
The implementation is copied from the Wikidata attribute.
The OEIS (On-Line Encyclopedia of Integer Sequences) is an online database of integer sequences. (see also [wikipedia](https://en.wikipedia.org/wiki/On-Line_Encyclopedia_of_Integer_Sequences), [OEIS](https://oeis.org), [provables/sequencelib](https://github.com/provables/sequencelib)).
This follows the same pattern as the DLMF attribute (#42899). |
t-meta
maintainer-merge
|
145/11 |
Mathlib/Tactic/CrossRefAttribute.lean,MathlibTest/CrossRefAttribute.lean,scripts/README.md,scripts/export_crossrefs.lean |
4 |
17 |
['SnirBroshi', 'emlis42', 'github-actions', 'joneugster', 'luigi-massacci'] |
nobody |
1-38161 1 day ago |
10-20901 10 days ago |
10-20871 10 days |
1 |
| 43183 |
BorisTheBrave author:BorisTheBrave |
fix(Tactic/Linarith): carry `!` and the configuration into `linarith?… |
`linarith?` uses the same configuration as `linarith`,
but previously printed a bare `linarith only [...]` suggestion regardless
of the configuration.
Now all config options except `minimize` are carried into the suggestion.
---
Note: #42588 has a [test](https://github.com/leanprover-community/mathlib4/pull/42588/files#diff-3657543f804f0a57e384f6a9338cc53803a50bebdfb16c1ecd0b514f3fda332fR863) that
unintentionally highlights the problem:
```lean
/--
info: Try this:
[apply] linarith only [hne, hle]
-/
#guard_msgs in
example (a b : ℚ) (hne : a ≠ b) (hle : a ≥ b) (junk : (0:ℚ) < 1) : b < a := by
linarith? +splitNe
```
This suggestion doesn't actually close the proof.
It should suggest `linarith +splitNE only [hne, hle]`.
Should we be using `says` syntax for these tests? I'm unclear on the rule here.
Note: `simp?` has very similar code, `filterSuggestionsAndLocalsFromSimpConfig`, that this PR was modelled after.
AI disclosure:
Claude Code (Fable) first flagged this problem to me, and wrote the first draft. I
made some tweaks to better fit mathlib's style, and wrote all the prose.
[](https://gitpod.io/from-referrer/) |
t-meta
new-contributor
maintainer-merge
|
68/6 |
Mathlib/Tactic/Linarith/Frontend.lean,MathlibTest/Tactic/Linarith/Basic.lean |
2 |
18 |
['BorisTheBrave', 'JovanGerb', 'github-actions', 'joneugster', 'sharky564'] |
joneugster assignee:joneugster |
1-37677 1 day ago |
36-45044 36 days ago |
43-43234 43 days |
0 |
| 44532 |
SnirBroshi author:SnirBroshi |
doc(1000-yaml): clarify ambiguous titles, add new items, fix formatting |
- Added "(subject)" to titles which appear multiple times
(e.g. "Euler's theorem" → "Euler's theorem (number theory)" and "Euler's theorem (differential geometry)")
- "Gentzen's consistency proof" was added in https://github.com/1000-plus/1000-plus.github.io/pull/36
- "Determination of the fifth Busy Beaver value" was added in https://github.com/1000-plus/1000-plus.github.io/pull/46
- The ID of "Lamé’s theorem" was changed in https://github.com/1000-plus/1000-plus.github.io/pull/39
- Moved "Bézout's identity" to keep the list sorted by the ID
- Fix formatting
---
In case you're wondering about `comment`s not being quoted (like `title`s), I've checked with the same way these are parsed by CI (PyYAML's `yaml.safe_load()`) that they're parsed the same way with and without quotes. A couple of `comment`s still have quotes because they need them.
btw "Bézout's identity" isn't in the [website](https://1000-plus.github.io/all) (only "Bézout's theorem", which is a different item) but it is in the yaml, and AFAICT the intention was to PR it to the list since it's in [Wikipedia's list](https://en.wikipedia.org/wiki/List_of_theorems), so I didn't delete it. See the PR description of #21926.
(if we do PR it, I think [this](https://github.com/1000-plus/1000-plus.github.io/blob/8e04b97dd24adc6e931be78a884da7e935bc8780/sync_mathlib_data.py#L374-L377) can be deleted)
<!-- Your PR title will become the first line of the commit message.
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Second, co-authors can also be listed in lines at the very bottom of
the commit message (that is, directly before the `---`) using the following format:
Co-authored-by: Author Name <author@email.com>
If you are moving or deleting declarations, please include these lines
at the bottom of the commit message (before the `---`, and also before
any "Co-authored-by" lines) using the following format:
Moves:
- Vector.* -> List.Vector.*
- ...
Deletions:
- Nat.bit1_add_bit1
- ...
Any other comments you want to keep out of the PR commit should go
below the `---`, and placed outside this HTML comment, or else they
will be invisible to reviewers.
If this PR depends on other PRs, please list them below this comment,
using the following format:
- [ ] depends on: #abc [optional extra text]
- [ ] depends on: #xyz [optional extra text]
-->
|
documentation
maintainer-merge
|
81/79 |
docs/100.yaml,docs/1000.yaml |
2 |
6 |
['SnirBroshi', 'github-actions', 'grunweg', 'joneugster'] |
nobody |
1-35022 1 day ago |
4-73926 4 days ago |
4-73896 4 days |
0 |
| 43676 |
SnirBroshi author:SnirBroshi |
doc(Order): `wikidata` tags for some basics |
---
I'm using the `attribute [wikidata ...] ...` syntax instead of `@[wikidata ...]` when things are `@[to_dual]`, because otherwise the Wikidata link doesn't appear in the docstring from some reason.
I'm not entirely sure if this is because of `@[to_dual]`, or classes, or just about decls that have an explicit docstring.
<!-- Your PR title will become the first line of the commit message.
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may create empty commits to indicate co-authorship, using commands like so:
git commit --author="Author Name <author@email.com>" --allow-empty -m "add Author Name as coauthor"
Second, co-authors can also be listed in lines at the very bottom of
the commit message (that is, directly before the `---`) using the following format:
Co-authored-by: Author Name <author@email.com>
If you are moving or deleting declarations, please include these lines
at the bottom of the commit message (before the `---`, and also before
any "Co-authored-by" lines) using the following format:
Moves:
- Vector.* -> List.Vector.*
- ...
Deletions:
- Nat.bit1_add_bit1
- ...
Any other comments you want to keep out of the PR commit should go
below the `---`, and placed outside this HTML comment, or else they
will be invisible to reviewers.
If this PR depends on other PRs, please list them below this comment,
using the following format:
- [ ] depends on: #abc [optional extra text]
- [ ] depends on: #xyz [optional extra text]
-->
[](https://gitpod.io/from-referrer/)
|
t-order
documentation
maintainer-merge
|
52/5 |
Mathlib/Order/BoundedOrder/Basic.lean,Mathlib/Order/Bounds/Defs.lean,Mathlib/Order/Closure.lean,Mathlib/Order/CompleteLattice/Defs.lean,Mathlib/Order/CompletePartialOrder.lean,Mathlib/Order/Defs/Lattice.lean,Mathlib/Order/Defs/LinearOrder.lean,Mathlib/Order/Defs/PartialOrder.lean,Mathlib/Order/Defs/Unbundled.lean,Mathlib/Order/Disjoint.lean,Mathlib/Order/Filter/Defs.lean,Mathlib/Order/GaloisConnection/Defs.lean,Mathlib/Order/Ideal.lean,Mathlib/Order/Max.lean,Mathlib/Order/Monotone/Defs.lean |
15 |
8 |
['SnirBroshi', 'github-actions', 'joneugster', 'mathlib-merge-conflicts'] |
joneugster assignee:joneugster |
1-35016 1 day ago |
1-38522 1 day ago |
30-10849 30 days |
0 |
| 44414 |
kim-em author:kim-em |
ci: report declarations moving into or out of meta in the declarations diff |
This PR makes the post-build declarations diff report declarations whose `meta` marking changed. The build passes `--meta-out meta_decls.txt` to the declaration dumper, uploads the file with the `import-graph` artifact, and `decls-diff.yml` passes both sides' files to the `decls-diff` action.
The `--meta-out` flag and the action inputs come from https://github.com/leanprover-community/mathlib-ci/pull/83 "feat: report declarations moving into or out of meta in the declarations diff". Until that lands and the pinned `mathlib-ci` ref is bumped, the build detects that the dumper lacks the flag and skips the dump, so this PR is safe to merge in either order. Master artifacts built before this change have no `meta_decls.txt`; for PRs whose merge-base predates it, the diff notes that `meta` changes are unavailable.
Motivated by https://leanprover.zulipchat.com/#narrow/channel/180721-mathlib-maintainers/topic/ensuring.20.60import.20Mathlib.60.20doesn.27t.20expose.20Lean.20internals/near/627447584
🤖 Prepared with Claude Code |
CI
maintainer-merge
|
18/3 |
.github/workflows/build_template.yml,.github/workflows/decls-diff.yml |
2 |
2 |
['github-actions', 'joneugster'] |
nobody |
1-33025 1 day ago |
8-55893 8 days ago |
8-55863 8 days |
0 |
| 43669 |
SnirBroshi author:SnirBroshi |
doc(Topology): `wikidata` tags for some basics |
---
I manually added comments on every tag, hope it helps reviewing.
<!-- Your PR title will become the first line of the commit message.
In this box, the text above the `---` (if not empty) will be appended
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In particular, note that most reviewers will only notice your PR
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Please ask for help on https://leanprover.zulipchat.com if needed.
When merging, all the commits will be squashed into a single commit
listing all co-authors.
Co-authors in the squash commit are gathered from two sources:
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each co-author among the commits in the pull request. If necessary, you
may create empty commits to indicate co-authorship, using commands like so:
git commit --author="Author Name <author@email.com>" --allow-empty -m "add Author Name as coauthor"
Second, co-authors can also be listed in lines at the very bottom of
the commit message (that is, directly before the `---`) using the following format:
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If you are moving or deleting declarations, please include these lines
at the bottom of the commit message (before the `---`, and also before
any "Co-authored-by" lines) using the following format:
Moves:
- Vector.* -> List.Vector.*
- ...
Deletions:
- Nat.bit1_add_bit1
- ...
Any other comments you want to keep out of the PR commit should go
below the `---`, and placed outside this HTML comment, or else they
will be invisible to reviewers.
If this PR depends on other PRs, please list them below this comment,
using the following format:
- [ ] depends on: #abc [optional extra text]
- [ ] depends on: #xyz [optional extra text]
-->
[](https://gitpod.io/from-referrer/)
|
t-topology
documentation
maintainer-merge
|
19/3 |
Mathlib/Topology/Defs/Basic.lean,Mathlib/Topology/Defs/Filter.lean,Mathlib/Topology/Defs/Induced.lean,Mathlib/Topology/GDelta/Basic.lean,Mathlib/Topology/Homeomorph/Defs.lean,Mathlib/Topology/MetricSpace/Pseudo/Defs.lean |
6 |
24 |
['SnirBroshi', 'github-actions', 'joneugster', 'mathlib-merge-conflicts'] |
joneugster assignee:joneugster |
1-32824 1 day ago |
11-980 11 days ago |
30-19894 30 days |
0 |
| 44323 |
marcelolynch author:marcelolynch |
chore(Init): stop setting a default library suggestions engine |
This PR removes `public import Lean.LibrarySuggestions.Default` from `Mathlib.Init`. Thus Mathlib no longer sets a default library suggestions engine. Since leanprover/lean4#15159, the default engine builds its index on the first query in each process, and with `import Mathlib` this takes minutes. The Lean maintainers consider the feature unused.
Without an engine, the `+suggestions` modes of `grind`, `simp?`, `simp_all?` and `solve_by_elim` fail until the file adds `import Lean.LibrarySuggestions.Default` or `set_library_suggestions`. `try?` continues to work.
The PR also removes the outdated `set_library_suggestions` override from `MathlibTest/RegisterTryTactic.lean`, and replaces the `grind +suggestions` docstring examples with `grind`. `Mathlib.Tactic.DuplicateDecls` now imports `Lean.Meta.CompletionName` directly.
Discussion: [#lean4 > lean4#15159 causes significant regression in MathlibTests](https://leanprover.zulipchat.com/#narrow/channel/270676-lean4/topic/lean4.2315159.20causes.20significant.20regression.20in.20MathlibTests)
🤖 Generated with [Claude Code](https://claude.com/claude-code)
|
t-meta
LLM-generated
maintainer-merge
|
4/10 |
Mathlib/Init.lean,Mathlib/Tactic/DuplicateDecls.lean,Mathlib/Tactic/TacticAnalysis/Declarations.lean,MathlibTest/RegisterTryTactic.lean |
4 |
5 |
['JovanGerb', 'github-actions', 'joneugster', 'leanprover-radar'] |
nobody |
1-30453 1 day ago |
11-22463 11 days ago |
11-22433 11 days |
0 |
| 44306 |
grunweg author:grunweg |
chore: rename check_title_labels in kebap-case |
This matches general conventions for such tools, as discussed on Zulip: https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/Naming.20convention/near/451072858
---
<!-- Your PR title will become the first line of the commit message.
In this box, the text above the `---` (if not empty) will be appended
to the commit message, and can be used to give additional context or
details. Please leave a blank newline before the `---`, otherwise GitHub
will format the text above it as a title.
For details on the "pull request lifecycle" in mathlib, please see:
https://leanprover-community.github.io/contribute/index.html
In particular, note that most reviewers will only notice your PR
if it passes the continuous integration checks.
Please ask for help on https://leanprover.zulipchat.com if needed.
When merging, all the commits will be squashed into a single commit
listing all co-authors.
Co-authors in the squash commit are gathered from two sources:
First, all authors of commits to this PR branch are included. Thus,
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|
CI
maintainer-merge
|
71/4 |
.github/workflows/build_template.yml,.github/workflows/check_pr_titles.yaml,lakefile.lean,scripts/README.md,scripts/check-title-labels.lean,scripts/check_title_labels.lean |
6 |
23 |
['Vierkantor', 'github-actions', 'grunweg', 'joneugster', 'marcelolynch', 'mathlib-bors'] |
nobody |
1-27606 1 day ago |
11-13 10 days ago |
11-2151 11 days |
0 |
| 42536 |
JovanGerb author:JovanGerb |
fix(Linter/UnusedTactic): don't use `IO.Ref` for extensibility |
This PR cleans up the unused tactic linter extensibility implementation. Previously, this was implemented using a `PersistentEnvExtension` and an `IO.Ref`. The problem with the `IO.Ref` is that it creates "spooky action at a distance": a command later in the file can affect what happens earlier in the file. Instead, we can allow both local and global modifications using a `SimpleScopedEnvExtension`.
Previously, the list of exceptions was unnaturally split into the two files. This PR makes it into just a single list.
Additionally:
- `#allow_unused_tactic` is deprecated in favour of `allow_unused_tactic`
- We put a namespace around the `change?` syntax, so that `change?` is not anymore a declared constant.
---
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|
file-removed
t-linter
maintainer-merge
|
128/148 |
Mathlib.lean,Mathlib/Init.lean,Mathlib/Tactic.lean,Mathlib/Tactic/Change.lean,Mathlib/Tactic/Linter/UnusedTactic.lean,Mathlib/Tactic/Linter/UnusedTacticExtension.lean,MathlibTest/Linter/UnusedTactic.lean |
7 |
26 |
['JovanGerb', 'adomani', 'github-actions', 'grunweg', 'leanprover-radar', 'mathlib-merge-conflicts', 'thorimur'] |
thorimur assignee:thorimur |
1-24027 1 day ago |
1-29044 1 day ago |
18-69295 18 days |
0 |
| 42355 |
sankalpsthakur author:sankalpsthakur |
fix(NormNum): error if remaining at locations are unused |
`norm_num at h1 h2 ...` (and other tactics built on `Lean.Elab.Tactic.withNondepPropLocation`) unconditionally processed every hypothesis in the location list, then the target. If an earlier hypothesis closed the goal (e.g. `norm_num` found `h1` to already be `False`), processing continued against an already-closed goal instead of stopping.
Unused `at` locations now error if an earlier location closed the goal.
Closes #28703.
---------
Note. `withNondepPropLocation` currently has no other callers in the Mathlib tree besides its own definition file.
AI coding tools were used to help draft this change and PR description. I reviewed the complete change, understand the reasoning, and verified the build locally before submitting. |
new-contributor
LLM-generated
t-meta
maintainer-merge
|
32/2 |
Mathlib/Util/AtLocation.lean,MathlibTest/Tactic/NormNum/Basic.lean |
2 |
24 |
['github-actions', 'grunweg', 'joneugster', 'mathlib-merge-conflicts', 'sankalpsthakur', 'thorimur'] |
joneugster assignee:joneugster |
1-17120 1 day ago |
28-58228 28 days ago |
48-59474 48 days |
0 |
| 42880 |
plp127 author:plp127 |
chore(Data/EReal): don't expose `EReal.recENNReal` |
Unexpose `EReal.recENNReal` because it uses an if-then-else block on a classical decidability instance, which will not reduce. Also golf the proofs of the theorems `EReal.recENNReal_coe_ennreal` and `EReal.recENNReal_neg_coe_ennreal`.
---
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|
t-data
maintainer-merge
|
9/13 |
Mathlib/Data/EReal/Operations.lean |
1 |
3 |
['FrankieNC', 'github-actions', 'joneugster'] |
joneugster assignee:joneugster |
1-13066 1 day ago |
54-11380 54 days ago |
54-11350 54 days |
0 |
| 44687 |
D-Thomine author:D-Thomine |
chore(UniformIntegrable): rename `UnifIntegrable.mk_iff` |
Rename `UnifIntegrable.mk_iff` in `unifIntegrable_mk_iff`, since the lemma does not benefit from the dot notation.
PR extracted from https://github.com/leanprover-community/mathlib4/pull/42993, which I intend to cut in more manageable chunks.
---
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|
easy
t-measure-probability
maintainer-merge
|
7/5 |
Mathlib/MeasureTheory/Function/UniformIntegrable.lean |
1 |
2 |
['github-actions', 'grunweg'] |
nobody |
0-44189 12 hours ago |
0-85692 23 hours ago |
0-85662 23 hours |
0 |
| 29624 |
mcdoll author:mcdoll |
feat(LinearAlgebra/LinearPMap): add definition of resolvent and resolvent identities |
This PR defines the resolvent of an unbounded operator as a linear map. There are slight differences to the way the resolvent is defined in the literature: we use a purely algebraic description, in particular we do not assume that the operator is closed.
We prove the well-known first and second resolvent identities.
---
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- [x] depends on: #42423
- [x] depends on: #42425
- [x] depends on: #43923
[](https://gitpod.io/from-referrer/)
|
t-algebra
t-analysis
maintainer-merge
label:t-algebra$ |
281/5 |
Mathlib.lean,Mathlib/Algebra/Algebra/Spectrum/Basic.lean,Mathlib/LinearAlgebra/LinearPMap.lean,Mathlib/LinearAlgebra/Resolvent.lean |
4 |
55 |
['YaelDillies', 'github-actions', 'j-loreaux', 'mathlib-dependent-issues', 'mathlib-merge-conflicts', 'mathlib4-merge-conflict-bot', 'mcdoll', 'riccardobrasca'] |
nobody |
0-40548 11 hours ago |
9-80651 9 days ago |
104-55782 104 days |
0 |
| 44645 |
Multramate author:Multramate |
chore: rename `chebyshevTsequence` to `chebyshevTSequence` |
Fixes the casing of `Polynomial.Chebyshev.chebyshevTsequence` to match `T`.
🤖 Generated with [Claude Code](https://claude.com/claude-code) |
LLM-generated
easy
maintainer-merge
|
5/3 |
Mathlib/Analysis/SpecialFunctions/Trigonometric/Chebyshev/ChebyshevGauss.lean,Mathlib/RingTheory/Polynomial/Chebyshev.lean |
2 |
4 |
['Multramate', 'github-actions', 'jjdishere'] |
nobody |
0-26608 7 hours ago |
2-24558 2 days ago |
2-24528 2 days |
0 |
| 44642 |
Multramate author:Multramate |
chore: fix `descendAlong` and `descendsAlong` in two descent lemma names |
Renames `faithful_overPullback_of_isomorphisms_descendAlong` to `…_descendsAlong` and `of_pushout_inr_of_descendsAlong` to `…_codescendsAlong`, matching their `DescendsAlong` and `CodescendsAlong` hypotheses.
🤖 Generated with [Claude Code](https://claude.com/claude-code) |
LLM-generated
easy
maintainer-merge
|
11/4 |
Mathlib/AlgebraicGeometry/Morphisms/FlatDescent.lean,Mathlib/CategoryTheory/MorphismProperty/Descent.lean |
2 |
4 |
['Multramate', 'github-actions', 'jjdishere'] |
nobody |
0-26433 7 hours ago |
2-25065 2 days ago |
2-25035 2 days |
0 |
| 44544 |
JovanGerb author:JovanGerb |
feat(Linter/Style): lint against `∀ᵉ`/`∃ᵉ` |
The `∀ᵉ`/`∃ᵉ` notation is used rarely in mathlib, so to many users it is an unfamiliar notation. Therefore, it would be better to simply not use it.
This PR adds a linter against the notation, which comes with a `Try this` suggestions that replaces the notation with uses of plain `∀`/`∃`
- The adaptations have been generated fully automatically using these `Try this` suggestions. So, it is easiest to review this PR commit by commit.
- The `∃ᵉ` notation is still used in one place, namely in the macro that defines the `{_ | _}` notation for sets. The linter explicitly does not flag this.
- This linter would fit in very nicely into the framework of #44496. That can be done in a follow-up PR after that is merged, and will remove the slowdown that this PR adds.
---
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|
t-linter
large-import
maintainer-merge
|
209/99 |
Mathlib/Algebra/Group/Irreducible/Indecomposable.lean,Mathlib/Algebra/Group/Subgroup/Defs.lean,Mathlib/Algebra/Group/Subgroup/Pointwise.lean,Mathlib/Algebra/Lie/Abelian.lean,Mathlib/Algebra/Lie/Basis/Basic.lean,Mathlib/Algebra/Lie/Subalgebra.lean,Mathlib/Algebra/Lie/Weights/Cartan.lean,Mathlib/Algebra/Lie/Weights/Chain.lean,Mathlib/Algebra/Module/Submodule/Union.lean,Mathlib/Analysis/Analytic/Basic.lean,Mathlib/Analysis/BoxIntegral/DivergenceTheorem.lean,Mathlib/Analysis/Calculus/Deriv/MeanValue.lean,Mathlib/Analysis/Calculus/FDeriv/Measurable.lean,Mathlib/Analysis/ConstantSpeed.lean,Mathlib/Analysis/Convex/Extreme.lean,Mathlib/Analysis/Convex/Side.lean,Mathlib/Analysis/Convex/SimplicialComplex/Basic.lean,Mathlib/Combinatorics/Quiver/Path/Decomposition.lean,Mathlib/Combinatorics/SimpleGraph/CompleteMultipartite.lean,Mathlib/Combinatorics/SimpleGraph/Matching.lean,Mathlib/Computability/Partrec.lean,Mathlib/Data/Finset/Lattice/Fold.lean,Mathlib/Data/Finset/Max.lean,Mathlib/Data/List/Chain.lean,Mathlib/Data/List/Sort.lean,Mathlib/Data/Set/Card.lean,Mathlib/Data/Set/Finite/Range.lean,Mathlib/Data/Set/Order.lean,Mathlib/Data/Set/Subsingleton.lean,Mathlib/FieldTheory/Minpoly/ConjRootClass.lean,Mathlib/Geometry/Manifold/VectorBundle/Basic.lean,Mathlib/Init.lean,Mathlib/LinearAlgebra/Dual/Lemmas.lean,Mathlib/LinearAlgebra/JordanChevalley.lean,Mathlib/LinearAlgebra/PerfectPairing/Restrict.lean,Mathlib/LinearAlgebra/RootSystem/BaseExists.lean,Mathlib/LinearAlgebra/RootSystem/Chain.lean,Mathlib/LinearAlgebra/RootSystem/Finite/Nondegenerate.lean,Mathlib/MeasureTheory/Covering/Differentiation.lean,Mathlib/MeasureTheory/Integral/FinMeasAdditive.lean,Mathlib/MeasureTheory/PiSystem.lean,Mathlib/MeasureTheory/SetAlgebra.lean,Mathlib/Order/CompactlyGenerated/Basic.lean,Mathlib/Order/DirectedInverseSystem.lean,Mathlib/Order/Filter/Interval.lean,Mathlib/Order/Hom/Set.lean,Mathlib/Order/Interval/Set/OrdConnectedLinear.lean,Mathlib/Order/Interval/Set/UnorderedInterval.lean,Mathlib/RingTheory/Algebraic/Basic.lean,Mathlib/RingTheory/DedekindDomain/Ideal/Lemmas.lean,Mathlib/RingTheory/UniqueFactorizationDomain/Multiplicative.lean,Mathlib/RingTheory/UniqueFactorizationDomain/NormalizedFactors.lean,Mathlib/RingTheory/WittVector/FrobeniusFractionField.lean,Mathlib/Tactic/Linter/Style.lean,Mathlib/Topology/Algebra/Semigroup.lean,Mathlib/Topology/Algebra/UniformFilterBasis.lean,Mathlib/Topology/Algebra/ValuativeRel/ValuativeTopology.lean,Mathlib/Topology/Algebra/Valued/ValuationTopology.lean,Mathlib/Topology/Connected/PathConnected.lean,Mathlib/Topology/ContinuousMap/StoneWeierstrass.lean,Mathlib/Topology/VectorBundle/Basic.lean,MathlibTest/Linter/ExtendedBinder.lean |
62 |
11 |
['JovanGerb', 'eric-wieser', 'github-actions', 'joneugster', 'leanprover-radar', 'mathlib-merge-conflicts', 'vihdzp'] |
joneugster assignee:joneugster |
0-25870 7 hours ago |
1-28700 1 day ago |
4-25522 4 days |
0 |
| 43795 |
harahu author:harahu |
feat(Logic/Function/Basic): add `Injective.existsUnique_iff_exists` |
We add `Injective.existsUnique_iff_exists` and use it to golf existing proofs.
This PR was created with assistance from Codex.
---
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[](https://gitpod.io/from-referrer/)
|
t-logic
maintainer-merge
|
19/43 |
Mathlib/Algebra/Field/IsField.lean,Mathlib/AlgebraicTopology/SimplicialSet/NonDegenerateSimplices.lean,Mathlib/Basic/Rel.lean,Mathlib/CategoryTheory/Limits/Types/Equalizers.lean,Mathlib/Data/Set/Image.lean,Mathlib/GroupTheory/ArchimedeanDensely.lean,Mathlib/Logic/Function/Basic.lean,Mathlib/RingTheory/Polynomial/Cyclotomic/Basic.lean |
8 |
11 |
['github-actions', 'harahu', 'leanprover-radar', 'mathlib-merge-conflicts', 'themathqueen'] |
nobody |
0-25136 6 hours ago |
0-30644 8 hours ago |
22-84165 22 days |
0 |
| 41506 |
YaelDillies author:YaelDillies |
refactor(Data): make `Set` a one-field structure |
Replace
```
def Set (α : Type u) := α → Prop
```
with
```
structure Set (α : Type u) where
ofPred :: Mem : α → Prop
```
Generated by Claude Opus. Painfully reviewed and improved line-by-line by myself.
Fix #10941
Assisted-by: Claude Opus 4.8
---
- [x] depends on: #41446
- [x] depends on: #41507
- [x] depends on: #41533
- [x] depends on: #42169
- [x] depends on: #42170
- [x] depends on: #42171
- [x] depends on: #42172
- [x] depends on: #42173
- [x] depends on: #43114
- [x] depends on: #43467
See previous attempt at #39211
[](https://gitpod.io/from-referrer/)
|
t-data
LLM-generated
tech debt
increases-technical-debt
maintainer-merge
merge-conflict
|
803/699 |
Archive/Imo/Imo1987Q1.lean,Archive/Imo/Imo2024Q3.lean,Archive/Imo/Imo2025Q3.lean,Counterexamples/Omega1Space.lean,Counterexamples/SorgenfreyLine.lean,Mathlib/Algebra/AffineMonoid/Irreducible.lean,Mathlib/Algebra/Group/Action/Equidecomp.lean,Mathlib/Algebra/Group/Irreducible/Indecomposable.lean,Mathlib/Algebra/GroupWithZero/NonZeroDivisors.lean,Mathlib/Algebra/Lie/Basis/Prod.lean,Mathlib/Algebra/Lie/Subalgebra.lean,Mathlib/Algebra/Lie/Submodule.lean,Mathlib/Algebra/Module/FinitePresentation.lean,Mathlib/Algebra/MonoidAlgebra/Grading.lean,Mathlib/Algebra/Order/Archimedean/Class.lean,Mathlib/Algebra/Order/Ring/StandardPart.lean,Mathlib/Algebra/Polynomial/Roots.lean,Mathlib/AlgebraicTopology/SimplicialSet/Monoidal.lean,Mathlib/Analysis/BoxIntegral/Basic.lean,Mathlib/Analysis/CStarAlgebra/ContinuousFunctionalCalculus/Continuity.lean,Mathlib/Analysis/CStarAlgebra/Spectrum.lean,Mathlib/Analysis/Calculus/ContDiff/Basic.lean,Mathlib/Analysis/Calculus/ContDiff/Operations.lean,Mathlib/Analysis/Calculus/Deriv/Basic.lean,Mathlib/Analysis/Calculus/Deriv/MeanValue.lean,Mathlib/Analysis/Calculus/FDeriv/Measurable.lean,Mathlib/Analysis/Calculus/FormalMultilinearSeries.lean,Mathlib/Analysis/Complex/CauchyIntegral.lean,Mathlib/Analysis/Complex/CoveringMap.lean,Mathlib/Analysis/Complex/PhragmenLindelof.lean,Mathlib/Analysis/Complex/UpperHalfPlane/ProperAction.lean,Mathlib/Analysis/Convex/Gauge.lean,Mathlib/Analysis/Fourier/AddCircleMulti.lean,Mathlib/Analysis/InnerProductSpace/Rayleigh.lean,Mathlib/Analysis/LocallyConvex/BalancedCoreHull.lean,Mathlib/Analysis/LocallyConvex/Polar.lean,Mathlib/Analysis/LocallyConvex/Separation.lean,Mathlib/Analysis/Meromorphic/Order.lean,Mathlib/Analysis/Normed/Group/Continuity.lean,Mathlib/Analysis/Normed/Group/Indicator.lean,Mathlib/Analysis/Normed/Group/Quotient.lean,Mathlib/Analysis/Normed/Module/FiniteDimension.lean,Mathlib/Analysis/Normed/Module/Seminorm/Basic.lean,Mathlib/Analysis/ODE/Transform.lean,Mathlib/Analysis/Oscillation.lean,Mathlib/Analysis/Polynomial/MahlerMeasure.lean,Mathlib/Analysis/SpecialFunctions/Complex/Analytic.lean,Mathlib/Analysis/SpecialFunctions/Complex/Arg.lean,Mathlib/Analysis/SpecialFunctions/Complex/Circle.lean,Mathlib/Analysis/SpecialFunctions/Log/Basic.lean,Mathlib/Analysis/SpecialFunctions/NonIntegrable.lean,Mathlib/Basic/NNReal/Basic.lean,Mathlib/CategoryTheory/CofilteredSystem.lean,Mathlib/CategoryTheory/Limits/FinallySmall.lean,Mathlib/CategoryTheory/Sites/JointlySurjective.lean,Mathlib/Combinatorics/Derangements/Basic.lean,Mathlib/Combinatorics/SimpleGraph/Clique.lean,Mathlib/Combinatorics/SimpleGraph/Connectivity/Subgraph.lean,Mathlib/Combinatorics/SimpleGraph/Subgraph.lean,Mathlib/Combinatorics/SimpleGraph/Walk/Maps.lean,Mathlib/Computability/NFA.lean,Mathlib/Computability/Reduce.lean,Mathlib/Data/Finset/Empty.lean,Mathlib/Data/Finset/Insert.lean,Mathlib/Data/Finset/SMulAntidiagonal.lean,Mathlib/Data/Nat/Digits/Lemmas.lean,Mathlib/Data/Nat/Nth.lean,Mathlib/Data/Set/Basic.lean,Mathlib/Data/Set/Card.lean,Mathlib/Data/Set/Defs.lean,Mathlib/Data/Set/Finite/List.lean,Mathlib/Data/Set/Finite/Powerset.lean,Mathlib/Data/Set/Insert.lean,Mathlib/Data/Set/List.lean,Mathlib/Data/Set/Prod.lean,Mathlib/Dynamics/Ergodic/Action/Basic.lean,Mathlib/Dynamics/Ergodic/Action/OfMinimal.lean,Mathlib/Dynamics/Ergodic/AddCircle.lean,Mathlib/Dynamics/Ergodic/Conservative.lean,Mathlib/Dynamics/OmegaLimit.lean,Mathlib/Dynamics/TopologicalEntropy/NetEntropy.lean,Mathlib/Dynamics/TopologicalEntropy/Subset.lean,Mathlib/FieldTheory/AxGrothendieck.lean,Mathlib/FieldTheory/Galois/Infinite.lean,Mathlib/FieldTheory/Minpoly/Basic.lean,Mathlib/Geometry/Diffeology/Basic.lean,Mathlib/Geometry/Euclidean/Circumcenter.lean,Mathlib/Geometry/Group/WordMetric.lean,Mathlib/Geometry/Manifold/Complex.lean,Mathlib/Geometry/Manifold/Instances/Real.lean,Mathlib/Geometry/Manifold/IntegralCurve/ExistUnique.lean,Mathlib/Geometry/Manifold/IntegralCurve/Transform.lean,Mathlib/Geometry/Manifold/PartitionOfUnity.lean,Mathlib/Geometry/Manifold/Riemannian/PathELength.lean,Mathlib/Geometry/Manifold/Sheaf/LocallyRingedSpace.lean,Mathlib/Geometry/Manifold/VectorBundle/CovariantDerivative/Metric.lean,Mathlib/GroupTheory/GroupAction/Blocks.lean,Mathlib/GroupTheory/GroupAction/Primitive.lean,Mathlib/GroupTheory/Perm/Centralizer.lean,Mathlib/GroupTheory/Perm/Cycle/Basic.lean |
262 |
57 |
['JovanGerb', 'Parcly-Taxel', 'SnirBroshi', 'TwoFX', 'YaelDillies', 'github-actions', 'leanprover-radar', 'mathlib-dependent-issues', 'mathlib-merge-conflicts', 'tb65536', 'themathqueen'] |
nobody |
0-23158 6 hours ago |
2-39711 2 days ago |
6-14380 6 days |
0 |
| 41861 |
stalex444 author:stalex444 |
feat(Algebra/Order/Floor): floor-of-sum dichotomy via fractional parts |
This PR adds four lemmas in Mathlib/Algebra/Order/Floor/Ring.lean, placed in the fractional-part section, complementing the existing one-sided bounds le_floor_add and le_floor_add_floor.
Here are the lemmas:
* floor_add_eq — writes ⌊a + b⌋ exactly as ⌊a⌋ + ⌊b⌋ + ⌊fract a + fract b⌋
* floor_add_eq_add_iff — the floors add exactly ⟺ the fractional parts sum below 1
* floor_add_eq_add_add_one_iff — the +1 case ⟺ the fractional parts sum to at least 1
* floor_add_eq_or — the dichotomy: it's always one or the other
The library has the two inequalities but not the exact case analysis, and this closes that small gap. In addition, these are the lemmas for the mechanical/Beatty-word development proposed here --https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/Sturmian.20.28mechanical.29.20words/near/610836902.
Claude helped draft the Lean code; I reviewed the code, built the module locally, and it compiled.
---
I'm flexible on the lemma names should reviewers prefer different forms
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t-algebra
LLM-generated
new-contributor
maintainer-merge
merge-conflict
label:t-algebra$ |
47/0 |
Mathlib/Algebra/Order/Floor/Ring.lean |
1 |
16 |
['BoltonBailey', 'github-actions', 'mathlib-merge-conflicts', 'stalex444', 'themathqueen'] |
nobody |
0-23033 6 hours ago |
0-23034 6 hours ago |
65-16448 65 days |
0 |
| 44670 |
BorisTheBrave author:BorisTheBrave |
chore(LinearAlgebra/TensorProduct/Defs): fix induction_on deprecation target |
The deprecation of `TensorProduct.induction_on` introduced in #43481 has a typo `TensorProduction`. Fix it.
---
Encountered while porting code from 4.33 to 4.34.
Note messages of this format are processed by scripts like `scripts/fix_deprecations.py` so their accuracy does matter somewhat.
AI disclosure: Diagnosed the issue with Claude Code Opus, which also proposed the trivial fix.
easy |
new-contributor
t-algebra
maintainer-merge
label:t-algebra$ |
1/1 |
Mathlib/LinearAlgebra/TensorProduct/Defs.lean |
1 |
5 |
['github-actions', 'jjdishere', 'plp127'] |
nobody |
0-16901 4 hours ago |
1-33477 1 day ago |
1-33447 1 day |
0 |
| 44692 |
vihdzp author:vihdzp |
refactor(RingTheory/PowerSeries/NoZeroDivisors): fix names |
We change e.g. `X_prime` to `prime_X`, as per the naming conventions. We also deprecate `span_X_isPrime` as a trivial consequence of `prime_X`.
---
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t-ring-theory
maintainer-merge
|
28/27 |
Mathlib/Algebra/MvPolynomial/Division.lean,Mathlib/RingTheory/LaurentSeries.lean,Mathlib/RingTheory/PowerSeries/Ideal.lean,Mathlib/RingTheory/PowerSeries/Inverse.lean,Mathlib/RingTheory/PowerSeries/NoZeroDivisors.lean |
5 |
3 |
['github-actions', 'jjdishere'] |
nobody |
0-14053 3 hours ago |
0-66151 18 hours ago |
0-66324 18 hours |
0 |
| 44683 |
D-Thomine author:D-Thomine |
feat(UniformIntegrable): remove an hypothesis of `UnifIntegrable.add` |
This PR removes a constraint on the parameter `p` in a lemma in `MeasureTheory.Function.UniformIntegrable`.
PR extracted from #42993, which I intend to cut in more manageable chunks.
---
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easy
t-measure-probability
maintainer-merge
|
16/10 |
Mathlib/MeasureTheory/Function/UniformIntegrable.lean |
1 |
7 |
['D-Thomine', 'github-actions', 'jjdishere'] |
nobody |
0-13584 3 hours ago |
1-3710 1 day ago |
1-3680 1 day |
0 |
| 44412 |
SnirBroshi author:SnirBroshi |
chore(Order/SuccPred/Relation): use `to_dual` |
---
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|
t-order
maintainer-merge
merge-conflict
|
33/75 |
Mathlib/Order/SuccPred/Relation.lean |
1 |
5 |
['JovanGerb', 'github-actions', 'mathlib-merge-conflicts'] |
nobody |
0-10749 2 hours ago |
0-10750 2 hours ago |
8-47655 8 days |
0 |
| 43633 |
Jun2028 author:Jun2028 |
feat(SetTheory/Ordinal): classify exponential principal ordinals |
Complete `` TODO: Prove that the exponential principal ordinals are `0`, `1`, `2`, `ω`, or `ε_ x` `` in [Mathlib/SetTheory/Ordinal/Principal.lean](https://github.com/leanprover-community/mathlib4/compare/master...Jun2028:mathlib4:feat/exponential-principal-classification?expand=1#diff-c700a68af59d576bafeeeac5211181f9ce129bdead444df6c9747344817103bd)
By the way, the original TODO was wrong because `1` is not an exponential principal ordinal (it requires $0^0=1<1$ which is false).
---
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|
t-set-theory
new-contributor
maintainer-merge
|
65/6 |
Mathlib/SetTheory/Ordinal/Principal.lean,Mathlib/SetTheory/Ordinal/Veblen.lean |
2 |
36 |
['Jun2028', 'SnirBroshi', 'YaelDillies', 'github-actions', 'mathlib-merge-conflicts', 'vihdzp'] |
nobody |
0-8022 2 hours ago |
0-9840 2 hours ago |
29-26515 29 days |
0 |
| 41909 |
wwylele author:wwylele |
feat(FieldTheory): field equivalences for bot subfield |
Make it easier to use than the existing Subfield equality lemma.
---
~~The ZMod version `Subfield.botEquivZMod_symm_apply` is missing because the statement
`(Subfield.botEquivZMod K p).symm x = algebraMap (ZMod p) (⊥ : Subfield K) x` doesn't type-check, which is missing the instance `Algebra (ZMod p) (⊥ : Subfield K)`, which is because [ZMod.algebra](https://leanprover-community.github.io/mathlib4_docs/Mathlib/Algebra/Algebra/ZMod.html#ZMod.algebra) is a `def`~~
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|
t-algebra
maintainer-merge
label:t-algebra$ |
34/3 |
Mathlib/FieldTheory/PrimeField.lean |
1 |
23 |
['copilot-pull-request-reviewer', 'github-actions', 'plp127', 'riccardobrasca', 'tb65536', 'wwylele'] |
eric-wieser assignee:eric-wieser |
0-1777 29 minutes ago |
7-26202 7 days ago |
83-73298 83 days |
0 |
| Number |
Author |
Title |
Description |
Labels |
+/- |
Modified files (first 100) |
📝 |
💬 |
All users who commented or reviewed |
Assignee(s) |
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blocks |
| 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', 'mathlib-bors', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot', 'sgouezel'] |
grunweg assignee:grunweg |
402-80869 1 year ago |
411-32023 411 days ago |
0-19882 5 hours |
0 |
| 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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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 |
331-68953 10 months ago |
371-47619 371 days ago |
1-160 1 day |
3 |
| 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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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 |
276-61519 9 months ago |
277-21852 277 days ago |
7-33574 7 days |
1 |
| 23929 |
meithecatte author:meithecatte |
feat(Computability/NFA): improve bound on pumping lemma |
---
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- [x] depends on: #25321
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|
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 |
225-66341 7 months ago |
490-9240 490 days ago |
34-10092 34 days |
0 |
| 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 |
206-84093 6 months ago |
233-45255 233 days ago |
0-187 3 minutes |
0 |
| 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 |
201-56497 6 months ago |
204-43237 204 days ago |
0-10825 3 hours |
0 |
| 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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|
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 |
197-66972 6 months ago |
232-1090 232 days ago |
0-18707 5 hours |
0 |
| 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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|
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 |
176-57196 5 months ago |
407-48274 407 days ago |
66-73556 66 days |
0 |
| 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 |
156-5913 5 months ago |
277-25314 277 days ago |
11-7507 11 days |
0 |
| 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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|
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 |
101-22853 3 months ago |
164-37301 164 days ago |
30-49603 30 days |
0 |
| 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
t-measure-probability
|
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 |
42 |
['felixpernegger', 'github-actions', 'mathlib-bors', 'mathlib-merge-conflicts', 'sgouezel'] |
nobody |
92-35586 3 months ago |
127-33214 127 days ago |
5-67427 5 days |
0 |
| 40994 |
felixpernegger author:felixpernegger |
chore(Topology): rename `IndiscreteTopology` to `HasIndiscreteTopology` |
Per naming convention. https://leanprover-community.github.io/contribute/naming.html#prop-valued-classes .
See [this](https://github.com/leanprover-community/leanprover-community.github.io/pull/882) PR for further information.
Renaming discrete topology will be more involved, sinced its used much more widely
---
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|
t-topology
awaiting-author
merge-conflict
awaiting-zulip
|
154/109 |
Mathlib/Analysis/Normed/Group/Basic.lean,Mathlib/Topology/AlexandrovDiscrete.lean,Mathlib/Topology/Algebra/Group/Basic.lean,Mathlib/Topology/Algebra/Monoid.lean,Mathlib/Topology/Compactness/Compact.lean,Mathlib/Topology/Constructions.lean,Mathlib/Topology/EMetricSpace/Basic.lean,Mathlib/Topology/Homeomorph/Defs.lean,Mathlib/Topology/Homotopy/Contractible.lean,Mathlib/Topology/Inseparable.lean,Mathlib/Topology/Irreducible.lean,Mathlib/Topology/Maps/Basic.lean,Mathlib/Topology/Metrizable/Basic.lean,Mathlib/Topology/NoetherianSpace.lean,Mathlib/Topology/Order.lean,Mathlib/Topology/Separation/Connected.lean,Mathlib/Topology/Sets/Opens.lean,Mathlib/Topology/Sheaves/PUnit.lean,Mathlib/Topology/UniformSpace/Separation.lean |
19 |
9 |
['felixpernegger', 'github-actions', 'j-loreaux', 'mathlib-merge-conflicts', 'scholzhannah'] |
scholzhannah assignee:scholzhannah |
87-50882 2 months ago |
106-28879 106 days ago |
2-10191 2 days |
0 |
| 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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- [x] depends on: #40060
[](https://gitpod.io/from-referrer/)
|
t-measure-probability
awaiting-zulip
merge-conflict
|
10/0 |
Mathlib/MeasureTheory/SetSemiring.lean |
1 |
6 |
['RemyDegenne', 'WojciechCzernous', 'gasparattila', 'github-actions', 'mathlib-dependent-issues', 'mathlib-merge-conflicts'] |
EtienneC30 assignee:EtienneC30 |
85-74339 2 months ago |
130-36632 130 days ago |
1-10686 1 day |
0 |
| 38957 |
wwylele author:wwylele |
chore(GroupTheory/DivisibleHull): remove `backward.privateInPublic` |
---
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|
tech debt
t-group-theory
awaiting-zulip
|
5/12 |
Mathlib/GroupTheory/DivisibleHull.lean |
1 |
14 |
['Komyyy', 'Vierkantor', 'github-actions', 'grunweg', 'jcommelin', 'wwylele'] |
nobody |
78-48411 2 months ago |
78-48411 78 days ago |
73-19357 73 days |
0 |
| 42066 |
lyfar author:lyfar |
feat(SimpleGraph/Coloring): add list-coloring compactness |
This is the focused part of [Lean Pool PR #275](https://github.com/Vilin97/lean-pool/pull/275) that does not duplicate Mathlib's existing ordinary de Bruijn--Erdős API. I brought it here after Vasily Ilin [recommended moving the genuinely new list-coloring part to Mathlib](https://github.com/Vilin97/lean-pool/pull/275#issuecomment-5066933313).
It adds `SimpleGraph.ListColoring`, restriction to induced subgraphs, compactness for explicitly finite color sets via `Set.Finite.rado_selection_subtype`, and the finite-induced-subgraph iff.
This is a formalized API for a standard corollary of Rado's selection lemma, not new mathematics.
AI disclosure: I used OpenAI Codex to inspect the current Mathlib API and contribution policy, adapt the list-coloring part of Lean Pool PR #275, implement this file, and run the verification commands below.
Verification:
```text
lake build Mathlib.Combinatorics.SimpleGraph.Coloring.List
lake exe lint-style Mathlib.Combinatorics.SimpleGraph.Coloring.List
lake exe batteries/runLinter Mathlib.Combinatorics.SimpleGraph.Coloring.List
lake exe mk_all --check
git diff upstream/master...HEAD --check
```
|
t-combinatorics
LLM-generated
new-contributor
awaiting-author
awaiting-zulip
|
96/0 |
Mathlib.lean,Mathlib/Combinatorics/SimpleGraph/Coloring/List.lean |
2 |
10 |
['SnirBroshi', 'felixpernegger', 'github-actions', 'lyfar'] |
nobody |
77-51344 2 months ago |
78-22867 78 days ago |
0-4355 1 hour |
0 |
| 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 |
23 |
['SnirBroshi', 'YaelDillies', 'astrainfinita', 'dagurtomas', 'github-actions', 'mathlib4-merge-conflict-bot', 'plp127', 'vihdzp'] |
nobody |
64-71067 2 months ago |
356-62059 356 days ago |
0-81 1 minute |
0 |
| 42551 |
plp127 author:plp127 |
chore: rename `Set.mem_singleton` |
Rename `Set.mem_singleton` to `Set.mem_singleton_self` and rename `Set.mem_singleton_iff` to `Set.mem_singleton`. Also rename `Set.notMem_singleton_self` to `Set.notMem_singleton`. This is consistent with other container types like `Finset` and `List`.
---
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|
awaiting-zulip
merge-conflict
|
705/683 |
Archive/Imo/Imo2019Q2.lean,Archive/Imo/Imo2024Q2.lean,Archive/Imo/Imo2024Q3.lean,Archive/Imo/Imo2024Q6.lean,Archive/Wiedijk100Theorems/CubingACube.lean,Counterexamples/CliffordAlgebraNotInjective.lean,Counterexamples/DiscreteTopologyNonDiscreteUniformity.lean,Counterexamples/GrothendieckPower.lean,Mathlib/Algebra/Algebra/NonUnitalSubalgebra.lean,Mathlib/Algebra/Algebra/Subalgebra/Lattice.lean,Mathlib/Algebra/BigOperators/Finprod.lean,Mathlib/Algebra/Category/Grp/Injective.lean,Mathlib/Algebra/CharP/MixedCharZero.lean,Mathlib/Algebra/CharP/Quotient.lean,Mathlib/Algebra/DualNumber.lean,Mathlib/Algebra/Group/Indicator.lean,Mathlib/Algebra/Group/Pointwise/Set/Finite.lean,Mathlib/Algebra/Group/Subgroup/Basic.lean,Mathlib/Algebra/Group/Subgroup/Lattice.lean,Mathlib/Algebra/Group/Submonoid/Defs.lean,Mathlib/Algebra/Group/Submonoid/Membership.lean,Mathlib/Algebra/Group/Submonoid/Operations.lean,Mathlib/Algebra/GroupWithZero/Range.lean,Mathlib/Algebra/Homology/TotalComplexShift.lean,Mathlib/Algebra/Lie/Engel.lean,Mathlib/Algebra/Lie/InvariantForm.lean,Mathlib/Algebra/Lie/Subalgebra.lean,Mathlib/Algebra/Lie/Submodule.lean,Mathlib/Algebra/Module/Submodule/Lattice.lean,Mathlib/Algebra/Module/Torsion/Basic.lean,Mathlib/Algebra/Module/ZLattice/Basic.lean,Mathlib/Algebra/Order/Ring/StandardPart.lean,Mathlib/Algebra/Pointwise/Stabilizer.lean,Mathlib/Algebra/Star/NonUnitalSubalgebra.lean,Mathlib/Algebra/Star/Pointwise.lean,Mathlib/Algebra/Star/Subalgebra.lean,Mathlib/AlgebraicGeometry/IdealSheaf/IrreducibleComponent.lean,Mathlib/AlgebraicGeometry/ProjectiveSpectrum/Topology.lean,Mathlib/AlgebraicTopology/SimplicialSet/Horn.lean,Mathlib/AlgebraicTopology/SimplicialSet/HornColimits.lean,Mathlib/AlgebraicTopology/SimplicialSet/StdSimplex.lean,Mathlib/Analysis/Analytic/Constructions.lean,Mathlib/Analysis/BoxIntegral/Partition/Split.lean,Mathlib/Analysis/CStarAlgebra/ContinuousFunctionalCalculus/Basic.lean,Mathlib/Analysis/CStarAlgebra/ContinuousFunctionalCalculus/Continuity.lean,Mathlib/Analysis/CStarAlgebra/Hom.lean,Mathlib/Analysis/CStarAlgebra/Projection.lean,Mathlib/Analysis/Calculus/ContDiff/Basic.lean,Mathlib/Analysis/Calculus/ContDiff/FaaDiBruno.lean,Mathlib/Analysis/Calculus/Deriv/Slope.lean,Mathlib/Analysis/Calculus/DerivativeTest.lean,Mathlib/Analysis/Calculus/FDeriv/Measurable.lean,Mathlib/Analysis/Calculus/Taylor.lean,Mathlib/Analysis/Complex/CanonicalDecomposition.lean,Mathlib/Analysis/Complex/Hadamard.lean,Mathlib/Analysis/Convex/Between.lean,Mathlib/Analysis/Convex/Exposed.lean,Mathlib/Analysis/Convex/Extreme.lean,Mathlib/Analysis/Convex/Gauge.lean,Mathlib/Analysis/Convex/Hull.lean,Mathlib/Analysis/Convex/Independent.lean,Mathlib/Analysis/Convex/Integral.lean,Mathlib/Analysis/Convex/Segment.lean,Mathlib/Analysis/Convex/Star.lean,Mathlib/Analysis/Convex/StrictConvexSpace.lean,Mathlib/Analysis/InnerProductSpace/Orthogonal.lean,Mathlib/Analysis/LocallyConvex/Bounded.lean,Mathlib/Analysis/LocallyConvex/Polar.lean,Mathlib/Analysis/LocallyConvex/Separation.lean,Mathlib/Analysis/LocallyConvex/WithSeminorms.lean,Mathlib/Analysis/Meromorphic/Basic.lean,Mathlib/Analysis/Meromorphic/NormalForm.lean,Mathlib/Analysis/Meromorphic/Order.lean,Mathlib/Analysis/Normed/Field/Basic.lean,Mathlib/Analysis/Normed/Lp/lpSpace.lean,Mathlib/Analysis/Normed/Module/Basic.lean,Mathlib/Analysis/Normed/Module/Connected.lean,Mathlib/Analysis/Normed/Unbundled/FiniteExtension.lean,Mathlib/Analysis/Normed/Unbundled/SeminormFromBounded.lean,Mathlib/Analysis/SpecialFunctions/Complex/Log.lean,Mathlib/Analysis/SpecialFunctions/ContinuousFunctionalCalculus/Rpow/Order.lean,Mathlib/Analysis/SpecialFunctions/Elliptic/Weierstrass.lean,Mathlib/Analysis/SpecialFunctions/Integrals/LogTrigonometric.lean,Mathlib/Analysis/SpecialFunctions/Integrals/PosLogEqCircleAverage.lean,Mathlib/Analysis/SpecialFunctions/Log/NegMulLog.lean,Mathlib/Analysis/SpecialFunctions/Pow/Asymptotics.lean,Mathlib/CategoryTheory/GradedObject.lean,Mathlib/CategoryTheory/GradedObject/Unitor.lean,Mathlib/CategoryTheory/Preadditive/HomOrthogonal.lean,Mathlib/CategoryTheory/Presentable/SharplyLT/Basic.lean,Mathlib/CategoryTheory/Sites/Grothendieck.lean,Mathlib/CategoryTheory/Sites/Sieves.lean,Mathlib/Combinatorics/Graph/Basic.lean,Mathlib/Combinatorics/Matroid/Basic.lean,Mathlib/Combinatorics/Matroid/Circuit.lean,Mathlib/Combinatorics/Matroid/Closure.lean,Mathlib/Combinatorics/Nullstellensatz.lean,Mathlib/Combinatorics/Quiver/Path/Vertices.lean,Mathlib/Combinatorics/SimpleGraph/Acyclic.lean,Mathlib/Combinatorics/SimpleGraph/Basic.lean |
363 |
3 |
['Ruben-VandeVelde', 'github-actions', 'mathlib-merge-conflicts'] |
nobody |
56-84559 1 month ago |
58-51332 58 days ago |
4-40823 4 days |
0 |
| 43136 |
joneugster author:joneugster |
feat(Tactic/Linter/ValidatePRTitle): do not check the capitalisation of the commit subject |
There have been false-positives on abbreviations and proper names which seem to justify not to lint for this.
---
[#mathlib reviewers > Check PR title](https://leanprover.zulipchat.com/#narrow/channel/345428-mathlib-reviewers/topic/Check.20PR.20title/with/604858902)
- [ ] depends on: https://github.com/leanprover-community/leanprover-community.github.io/pull/905
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blocked-by-other-PR
t-linter
awaiting-zulip
|
3/51 |
Mathlib/Tactic/Linter/ValidatePRTitle.lean,MathlibTest/ValidatePRTitle.lean |
2 |
2 |
['github-actions', 'mathlib-dependent-issues'] |
nobody |
45-11852 1 month ago |
45-17439 45 days ago |
0-15 15 seconds |
0 |
| 43634 |
attilavjda author:attilavjda |
doc(LinearAlgebra/Matrix): document `trace_units_conj'` |
Add a docstring for `Matrix.trace_units_conj'` and remove `linter.docPrime`.
Used Aristotle AI to find this issue and solution.
---
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t-algebra
awaiting-zulip
label:t-algebra$ |
2/1 |
Mathlib/LinearAlgebra/Matrix/Trace.lean |
1 |
7 |
['attilavjda', 'github-actions', 'themathqueen'] |
nobody |
30-26490 1 month ago |
30-26490 30 days ago |
0-84363 23 hours |
0 |
| 40022 |
chenson2018 author:chenson2018 |
chore(Algebra): refactor proofs where `grind?` fails |
These are sources of technical debt as now reported in the [weekly linting report](https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/Weekly.20linting.20log/with/544658968). The idea is that a successful grind proof can fail to report the theorems it used via grind?, which means that if these proofs break across toolchains that it becomes significantly harder to repair.
---
- [ ] depends on: #39808
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t-algebra
awaiting-zulip
merge-conflict
blocked-by-other-PR
label:t-algebra$ |
16/6 |
Mathlib/Algebra/Group/Defs.lean,Mathlib/Algebra/Notation/Support.lean,Mathlib/Algebra/Order/BigOperators/Group/Finset.lean,Mathlib/Algebra/Order/Field/Basic.lean,Mathlib/Algebra/Order/Ring/StandardPart.lean,Mathlib/Algebra/Polynomial/Degree/Lemmas.lean |
6 |
5 |
['github-actions', 'joneugster', 'mathlib-dependent-issues', 'mathlib-merge-conflicts', 'themathqueen'] |
themathqueen assignee:themathqueen |
29-27651 29 days ago |
104-39385 104 days ago |
29-68789 29 days |
0 |
| 25218 |
kckennylau author:kckennylau |
feat(AlgebraicGeometry): Tate normal form of elliptic curves |
---
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|
merge-conflict
t-algebraic-geometry
awaiting-zulip
new-contributor
will-close-soon
|
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 |
32 |
['MichaelStollBayreuth', 'Multramate', 'acmepjz', 'github-actions', 'grunweg', 'joneugster', 'kckennylau', 'leanprover-community-bot-assistant'] |
nobody |
21-31917 21 days ago |
495-40341 495 days ago |
6-44783 6 days |
0 |
| 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
will-close-soon
|
218/2 |
Mathlib/Computability/Language.lean,Mathlib/Computability/NFA.lean |
2 |
92 |
['EtienneC30', 'b-mehta', 'ctchou', 'github-actions', 'joneugster', 'leanprover-community-bot-assistant', 'meithecatte', 'rudynicolop'] |
nobody |
21-31711 21 days ago |
523-28206 523 days ago |
39-60738 39 days |
0 |
| 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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[](https://gitpod.io/from-referrer/)
|
merge-conflict
t-computability
awaiting-zulip
new-contributor
will-close-soon
|
490/0 |
Mathlib.lean,Mathlib/Computability/RegularExpressionsToEpsilonNFA.lean,docs/references.bib |
3 |
8 |
['anthonyde', 'github-actions', 'joneugster', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot', 'meithecatte', 'qawbecrdtey'] |
nobody |
21-31590 21 days ago |
522-86023 522 days ago |
75-77754 75 days |
0 |
| 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
will-close-soon
|
159/0 |
Mathlib/Computability/DFA.lean,Mathlib/Computability/Language.lean |
2 |
61 |
['EtienneC30', 'YaelDillies', 'github-actions', 'joneugster', 'maemre', 'mathlib4-merge-conflict-bot', 'meithecatte', 'urkud'] |
nobody |
21-31559 21 days ago |
572-24267 572 days ago |
48-67492 48 days |
0 |
| 17623 |
astrainfinita author:astrainfinita |
feat(Algebra/Order/GroupWithZero/Unbundled): add some lemmas |
Some lemmas in `Algebra.Order.GroupWithZero.Unbundled` have incorrect or unsatisfactory names, or assumptions that can be omitted using `ZeroLEOneClass`. The lemmas added in this PR are versions of existing lemmas that use the correct or better name or `ZeroLEOneClass` to omit an assumption. The original lemmas will be deprecated in #17593.
| New name | Old name |
|-------------------------|-------------------------|
| `mul_le_one_left₀` | `Left.mul_le_one_of_le_of_le` |
| `mul_lt_one_of_le_of_lt_left₀` (`0 ≤ ·` version) / `mul_lt_one_of_le_of_lt_of_pos_left` | `Left.mul_lt_of_le_of_lt_one_of_pos` |
| `mul_lt_one_of_lt_of_le_left₀` | `Left.mul_lt_of_lt_of_le_one_of_nonneg` |
| `mul_le_one_right₀` | `Right.mul_le_one_of_le_of_le` |
| `mul_lt_one_of_lt_of_le_right₀` (`0 ≤ ·` version) / `mul_lt_one_of_lt_of_le_of_pos_right` | `Right.mul_lt_one_of_lt_of_le_of_pos` |
| `mul_lt_one_of_le_of_lt_right₀` | `Right.mul_lt_one_of_le_of_lt_of_nonneg` |
The following lemmas use `ZeroLEOneClass`.
| New name | Old name |
|-------------------------|-------------------------|
| `(Left.)one_le_mul₀` | `Left.one_le_mul_of_le_of_le` |
| `Left.one_lt_mul_of_le_of_lt₀` | `Left.one_lt_mul_of_le_of_lt_of_pos` |
| `Left.one_lt_mul_of_lt_of_le₀` | `Left.lt_mul_of_lt_of_one_le_of_nonneg` / `one_lt_mul_of_lt_of_le` (still there) |
| `(Left.)one_lt_mul₀` | |
| `Right.one_le_mul₀` | `Right.one_le_mul_of_le_of_le` |
| `Right.one_lt_mul_of_lt_of_le₀` | `Right.one_lt_mul_of_lt_of_le_of_pos` |
| `Right.one_lt_mul_of_le_of_lt₀` | `Right.one_lt_mul_of_le_of_lt_of_nonneg` / `one_lt_mul_of_le_of_lt` (still there) / `one_lt_mul` (still there) |
| `Right.one_lt_mul₀` | `Right.one_lt_mul_of_lt_of_lt` |
---
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Split from #17593.
[](https://gitpod.io/from-referrer/)
|
merge-conflict
t-algebra
awaiting-zulip
t-order
will-close-soon
label:t-algebra$ |
146/44 |
Mathlib/Algebra/Order/GroupWithZero/Canonical.lean,Mathlib/Algebra/Order/GroupWithZero/Unbundled.lean |
2 |
12 |
['YaelDillies', 'astrainfinita', 'github-actions', 'j-loreaux', 'joneugster'] |
nobody |
21-31395 21 days ago |
696-28919 696 days ago |
33-64877 33 days |
2 |
| 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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merge-conflict
t-algebra
awaiting-zulip
will-close-soon
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 |
13 |
['MichaelStollBayreuth', 'acmepjz', 'eric-wieser', 'github-actions', 'joneugster', 'leanprover-bot', 'leanprover-community-bot-assistant', 'urkud'] |
nobody |
21-31377 21 days ago |
734-14029 734 days ago |
0-66650 18 hours |
0 |
| 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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blocked-by-other-PR
new-contributor
t-computability
merge-conflict
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|
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 |
4 |
['github-actions', 'joneugster', 'meithecatte'] |
nobody |
21-31285 21 days ago |
792-22822 792 days ago |
0-179 2 minutes |
0 |
| 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
will-close-soon
|
307/5 |
Mathlib/Computability/NFA.lean |
1 |
28 |
['TpmKranz', 'YaelDillies', 'dupuisf', 'github-actions', 'joneugster', 'leanprover-community-bot-assistant', 'meithecatte', 'rudynicolop'] |
nobody |
21-31282 21 days ago |
746-27073 746 days ago |
45-84611 45 days |
1 |
| 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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- [x] depends on: #15647 [Data.FinEnum.Option unchanged since then]
[](https://gitpod.io/from-referrer/)
|
new-contributor
t-computability
merge-conflict
awaiting-author
awaiting-zulip
will-close-soon
|
298/0 |
Mathlib.lean,Mathlib/Computability/GNFA.lean,Mathlib/Computability/Language.lean,Mathlib/Computability/RegularExpressions.lean,docs/references.bib |
5 |
8 |
['github-actions', 'joneugster', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot', 'meithecatte', 'trivial1711'] |
nobody |
21-31278 21 days ago |
671-65856 671 days ago |
23-54870 23 days |
1 |
| 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
will-close-soon
|
301/2 |
Mathlib.lean,Mathlib/Topology/Compactness/KappaLindelof.lean,Mathlib/Topology/Compactness/Lindelof.lean |
3 |
39 |
['ADedecker', 'JADekker', 'PatrickMassot', 'StevenClontz', 'adomani', 'github-actions', 'grunweg', 'joneugster', 'kim-em', 'urkud'] |
nobody |
21-31097 21 days ago |
800-45242 800 days ago |
123-25636 123 days |
1 |
| 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 |
33 |
['PrParadoxy', 'dagurtomas', 'eric-wieser', 'github-actions', 'goliath-klein', 'leanprover-radar', 'mathlib-bors', 'mathlib-merge-conflicts', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] |
nobody |
21-20344 21 days ago |
292-18279 292 days ago |
10-66980 10 days |
1 |
| 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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[](https://gitpod.io/from-referrer/)
|
awaiting-zulip
merge-conflict
t-data
|
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 |
6 |
['github-actions', 'mathlib-merge-conflicts', 'themathqueen', 'wrenna-robson'] |
nobody |
20-79227 20 days ago |
151-24393 151 days ago |
0-7302 2 hours |
0 |
| 44066 |
cadamcat author:cadamcat |
doc: note formalisation of Mihăilescu's theorem in 1000.yaml |
Record an external Lean formalisation of Mihăilescu's theorem (Q174955, formerly Catalan's conjecture). The comment no longer says that only the statement is formalised, since the formal-conjectures statement now links to this proof.
---
- Formalisation: [cadamcat/catalan-lean4](https://github.com/cadamcat/catalan-lean4), release [v1.0.0](https://github.com/cadamcat/catalan-lean4/releases/tag/v1.0.0). The link points to `Catalan.catalans_conjecture` in `Catalan/Final/Assembly.lean`, pinned at commit `4bf1f74`.
- The statement is verbatim the one in formal-conjectures, which has linked this proof since [google-deepmind/formal-conjectures#6452](https://github.com/google-deepmind/formal-conjectures/pull/6452) (merged 2026-09-22).
- The project pins Lean 4.33.1 and Mathlib `0df444a360eaa60ab8c11dca51a86af692955474`. `#print axioms Catalan.catalans_conjecture` reports `[propext, Classical.choice, Quot.sound]` ([recorded output](https://github.com/cadamcat/catalan-lean4/blob/4bf1f742eb341decbdfc59ec56e1616f4d13e33b/Verification/axioms.txt)). The [supplemental evidence](https://github.com/cadamcat/catalan-lean4/blob/4bf1f742eb341decbdfc59ec56e1616f4d13e33b/Verification/Supplemental/README.md) records our runs of the nanoda kernel checker and a build of the complete Mathlib library from source on Linux, for proof commit `897079d`, whose proof sources are identical to `4bf1f74`.
- The project vendors 871 unmodified modules of [ClassFieldTheory](https://github.com/n-yamaguchi-0729/ClassFieldTheory) (commit `2930b56`, Apache-2.0) for the class field theory it uses.
- `scripts/yaml_check.py docs/100.yaml docs/1000.yaml docs/overview.yaml docs/undergrad.yaml` passes.
AI disclosure: the linked formalisation was developed with AI coding agents (Codex and Claude Code; see its [AUTHORS.md](https://github.com/cadamcat/catalan-lean4/blob/4bf1f742eb341decbdfc59ec56e1616f4d13e33b/AUTHORS.md)). I checked the final statement, its match with formal-conjectures, and the axiom output.
|
new-contributor
awaiting-zulip
LLM-generated
|
4/1 |
docs/1000.yaml |
1 |
4 |
['github-actions', 'grunweg'] |
nobody |
17-46706 17 days ago |
17-46721 17 days ago |
1-2028 1 day |
0 |
| 42007 |
felixpernegger author:felixpernegger |
chore: don't use `by assumption` for hypothesis with exposed name |
Let's say some goal if solve with `:= by assumption` and `assumption` is using `h` to solve it. Then `:= h` would also solve the goal (note: in most cases this is not possible, we would need to expose names before). This is more readable (tells the used explicitly what is being used) and at least in theory slightly faster.
This PR replace all such `by assumption` with the hypothesis directly. If this looks good / gets merged, I will make another PR replacing also `assumption`'s which do not immediately follow a `by`.
---
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[](https://gitpod.io/from-referrer/)
|
tech debt
awaiting-author
awaiting-zulip
merge-conflict
|
18/18 |
Mathlib/Algebra/Homology/DerivedCategory/DerivabilityStructureInjectives.lean,Mathlib/Algebra/Polynomial/BigOperators.lean,Mathlib/Analysis/Calculus/FDeriv/Congr.lean,Mathlib/Analysis/Calculus/Gradient/Basic.lean,Mathlib/Analysis/MeanInequalities.lean,Mathlib/Analysis/SpecialFunctions/Trigonometric/Chebyshev/RootsExtrema.lean,Mathlib/CategoryTheory/Limits/FinallySmall.lean,Mathlib/CategoryTheory/Presentable/Type.lean,Mathlib/Combinatorics/Additive/ApproximateSubgroup.lean,Mathlib/Geometry/Manifold/MFDeriv/SpecificFunctions.lean,Mathlib/Geometry/RingedSpace/LocallyRingedSpace.lean,Mathlib/LinearAlgebra/PiTensorProduct/Generators.lean,Mathlib/Order/Atoms.lean,Mathlib/Topology/Algebra/Valued/LocallyCompact.lean,Mathlib/Topology/Category/CompHausLike/EffectiveEpi.lean,Mathlib/Topology/Category/Profinite/Nobeling/Basic.lean,Mathlib/Topology/Category/TopCat/EffectiveEpi.lean |
17 |
16 |
['SnirBroshi', 'Vierkantor', 'felixpernegger', 'github-actions', 'leanprover-radar', 'mathlib-merge-conflicts'] |
nobody |
14-34729 14 days ago |
78-46768 78 days ago |
1-66762 1 day |
0 |
| 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
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 |
14 |
['eric-wieser', 'github-actions', 'grunweg', 'mathlib-bors', 'mathlib-merge-conflicts', 'wwylele', 'yhx-12243'] |
nobody |
12-54266 12 days ago |
167-5057 167 days ago |
0-26133 7 hours |
0 |
| 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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[](https://gitpod.io/from-referrer/)
|
t-data
awaiting-author
awaiting-zulip
|
170/0 |
Mathlib/Basic/SetLike/Basic.lean,Mathlib/Data/Quot.lean,Mathlib/Data/Set/Image.lean,Mathlib/Order/Setoid/Basic.lean |
4 |
9 |
['SnirBroshi', 'TwoFX', 'eric-wieser', 'github-actions', 'mathlib-merge-conflicts', 'wrenna-robson'] |
TwoFX assignee:TwoFX |
8-60818 8 days ago |
317-51882 317 days ago |
35-84279 35 days |
0 |
| 44489 |
brackxm author:brackxm |
doc: add external proofs to the 100 theorems list |
Adds attribution and links to Lean proofs for nine entries in docs/100.yaml: Feuerbach, Four Color, Fermat’s Last Theorem, Puiseux, the classification of Platonic solids, transcendence of π, Hermite–Lindemann, Morley and Pick.
Updates Fermat’s note to distinguish the external proof from the separate mathlib-based FLT project. |
new-contributor
awaiting-zulip
|
29/1 |
docs/100.yaml |
1 |
4 |
['SnirBroshi', 'github-actions'] |
nobody |
6-2155 6 days ago |
6-2155 6 days ago |
0-2957 49 minutes |
0 |
| 43318 |
wpegden author:wpegden |
doc(1000): add the strong and weak perfect graph theorems |
Adds external-formalization entries for Q16680059 (strong perfect graph theorem) and Q2800071 (perfect graph theorem), both formalized in Lean 4 at https://github.com/wpegden/spgt with commit-pinned permalinks.
---
<!-- Your PR title will become the first line of the commit message.
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[](https://gitpod.io/from-referrer/)
|
new-contributor
awaiting-zulip
|
8/0 |
docs/1000.yaml |
1 |
15 |
['SnirBroshi', 'github-actions', 'grunweg', 'thorimur', 'wpegden', 'wwylele'] |
nobody |
6-1983 6 days ago |
38-20216 38 days ago |
0-72926 20 hours |
0 |
| 41337 |
gotrevor author:gotrevor |
doc(1000-yaml): add Goodstein's theorem and the Kirby–Paris theorem |
Claims two listed-but-unclaimed entries in the 1000+ theorems scoreboard by adding external-formalization pointers (no mathlib declaration; same pattern as Löb's theorem [`Q204884`](https://github.com/leanprover-community/mathlib4/blob/master/docs/1000.yaml#L201), the flypitch continuum-hypothesis independence [`Q208416`](https://github.com/leanprover-community/mathlib4/blob/master/docs/1000.yaml#L216), and Arrow's impossibility theorem [`Q33481`](https://github.com/leanprover-community/mathlib4/blob/master/docs/1000.yaml#L30)).
## Entries
| Wikidata | Theorem | Formalization |
|----------|---------|---------------|
| `Q1149185` | **Goodstein's theorem** — every Goodstein sequence terminates | [`lean-gallery`](https://github.com/gotrevor/lean-gallery/blob/main/LeanGallery/Logic/Goodstein/Statement.lean) (ordinal-descent proof) |
| `Q1149185X` | **Kirby–Paris theorem** — PA does not prove that every Goodstein sequence terminates | [`goodstein-independence`](https://github.com/gotrevor/goodstein-independence/blob/main/src/GoodsteinPA/Statement.lean) |
## Notes
- **`Q1149185X` (Kirby–Paris, 1982)** is built on the [`FormalizedFormalLogic/Foundation`](https://github.com/FormalizedFormalLogic/Foundation) library (the same library that backs the existing Löb's-theorem entry [`Q204884`](https://github.com/leanprover-community/mathlib4/blob/master/docs/1000.yaml#L201)), via the Wainer growth-rate route (`Goodstein` outgrows every PA-provably-total function). The headline `peano_not_proves_goodstein` is sorry-free and `#print axioms`-clean — it rests on exactly `[propext, Classical.choice, Quot.sound]`.
- **`Q1149185`** is Goodstein's theorem proper (the termination statement, provable in ZFC / Lean); mathlib does not currently contain it.
- Both formalizations are by Trevor Morris, developed with AI assistance: Claude Code (Fable 5, Opus), Codex, and Harmonic's Aristotle.
🤖 Generated with [Claude Code](https://claude.com/claude-code) |
new-contributor
LLM-generated
awaiting-zulip
|
6/0 |
docs/1000.yaml |
1 |
7 |
['SnirBroshi', 'felixpernegger', 'github-actions', 'gotrevor', 'wwylele'] |
nobody |
6-1641 6 days ago |
6-1641 6 days ago |
92-75808 92 days |
0 |
| 44251 |
gotrevor author:gotrevor |
doc(1000-yaml): add the Paris–Harrington theorem |
Adds an external-formalization pointer to the Paris–Harrington entry `Q7137494`, in the same form as my open #41337 (Goodstein / Kirby–Paris).
I know #44115 proposes moving non-mathlib entries out of `1000.yaml` (as @wwylele noted on #41337). I'm opening this anyway so the formalization is easy to find: nobody else needs to redo Paris–Harrington, and anyone who wants to build on it or cite it can start from this one. If #44115 lands, I'm happy to close this and re-home the entry wherever external formalizations end up.
## Entry
| Wikidata | Theorem | Formalization |
|----------|---------|---------------|
| `Q7137494` | **Paris–Harrington theorem**: Peano Arithmetic does not prove the Paris–Harrington principle (the strengthened finite Ramsey theorem with "relatively large" homogeneous sets), though it is true | [`goodstein-independence`](https://github.com/gotrevor/goodstein-independence/blob/main/src/GoodsteinPA/PH/Main.lean) |
## Notes
- Headline: `GoodsteinPA.PH.pa_not_proves_ph`. For every Σ₁ formula defining the principle, PA does not prove its universal closure. Companion theorems: `exists_sigma1_ph_def` (such a formula exists) and `ph_true` (the principle holds, via infinite Ramsey).
- The lower bound follows Buchholz's lecture-notes proof, after Loebl–Nešetřil. Independence then goes through a Wainer-style bound for PA-provable Π₂ sentences, built on the [`FormalizedFormalLogic/Foundation`](https://github.com/FormalizedFormalLogic/Foundation) library, the same library behind the Löb's-theorem entry `Q204884`.
- Developed with AI assistance (Claude Code and Codex).
|
LLM-generated
new-contributor
awaiting-zulip
|
4/0 |
docs/1000.yaml |
1 |
4 |
['SnirBroshi', 'github-actions', 'gotrevor'] |
nobody |
6-1540 6 days ago |
12-23563 12 days ago |
0-86039 23 hours |
0 |
| 43143 |
martinwintermath author:martinwintermath |
feat(LinearAlgebra/SesquilinearForm): add instances for SeparatingLeft, SeparatingRight and Nondegenerate |
Add typeclass instances for `Fact B.SeparatingLeft`, `Fact B.SeparatingRight`, `Fact B.Nondegenerate`:
* inferring `Fact B.flip.SeparatingLeft` from `Fact B.SeparatingRight` and vice versa
* inferring `Fact B.SeparatingLeft` and `Fact B.SeparatingRight` from `Fact B.Nondegenerate`
* inferring `Fact B.SeparatingLeft` and `Fact B.Nondegenerate` for `.id` and `Dual.eval`
* inferring `Fact B.Nondegenerate` from `B.IsPerfPair`
I also updated `PointedCone.dual_univ` to demonstrate a use for these additions. Note that I needed to add an import to `Cone/Dual.lean` which somehow imports cardinals. So I needed to remove cardinals from `assert_not_exists`.
Zulip: [#mathlib4 > Typeclass instances for separating bilinear forms](https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/Typeclass.20instances.20for.20separating.20bilinear.20forms/with/570348517)
---
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|
large-import
t-algebra
awaiting-zulip
label:t-algebra$ |
32/4 |
Mathlib/Geometry/Convex/Cone/Dual.lean,Mathlib/LinearAlgebra/PerfectPairing/Basic.lean,Mathlib/LinearAlgebra/SesquilinearForm/Basic.lean |
3 |
9 |
['SnirBroshi', 'github-actions', 'martinwintermath', 'mathlib-dependent-issues', 'themathqueen'] |
nobody |
5-22770 5 days ago |
5-35188 5 days ago |
34-59100 34 days |
0 |
| 43196 |
danderson70-UNL author:danderson70-UNL |
doc: add Jacobi Four-Square proof to the list of 1000 theorems |
|
new-contributor
awaiting-zulip
|
3/0 |
docs/1000.yaml |
1 |
6 |
['SnirBroshi', 'danderson70-UNL', 'github-actions'] |
nobody |
4-82107 4 days ago |
6-1770 6 days ago |
36-84896 36 days |
0 |
| 44494 |
SnirBroshi author:SnirBroshi |
chore(RingTheory/Ideal): `ltSeries` -> `ltseries` |
The constant is named `LTSeries`, and the conventions are to lowercase the initial uppercase streak.
---
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|
t-ring-theory
awaiting-zulip
|
28/12 |
Mathlib/RingTheory/Ideal/GoingDown.lean,Mathlib/RingTheory/Ideal/GoingUp.lean,Mathlib/RingTheory/Ideal/HasGoingUp.lean,Mathlib/RingTheory/Ideal/Height.lean,Mathlib/RingTheory/Ideal/KrullsHeightTheorem.lean,Mathlib/RingTheory/KrullDimension/Regular.lean,Mathlib/RingTheory/Spectrum/Prime/LTSeries.lean |
7 |
4 |
['SnirBroshi', 'github-actions', 'themathqueen'] |
nobody |
4-44230 4 days ago |
5-36623 5 days ago |
0-45675 12 hours |
0 |
| 44493 |
SnirBroshi author:SnirBroshi |
chore(Algebra/Category/FGModuleCat/Basic): `fgModuleCat` -> `fgmoduleCat` |
The constant is named `FGModuleCat`, and the conventions are to lowercase the initial uppercase streak.
---
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|
t-algebra
t-category-theory
awaiting-zulip
label:t-algebra$ |
28/8 |
Mathlib/Algebra/Category/FGModuleCat/Basic.lean |
1 |
7 |
['SnirBroshi', 'github-actions', 'joelriou', 'themathqueen'] |
nobody |
1-18589 1 day ago |
5-49023 5 days ago |
0-33285 9 hours |
0 |
| 42692 |
Parcly-Taxel author:Parcly-Taxel |
refactor: unify `Set.mem_ofPred_eq` into `Set.mem_ofPred` |
Before:
```lean
@[simp, mfld_simps, push]
theorem mem_ofPred_eq {x : α} {p : α → Prop} : (x ∈ {y | p y}) = p x := rfl
theorem mem_ofPred {a : α} {p : α → Prop} : a ∈ { x | p x } ↔ p a := Iff.rfl
```
After:
```lean
@[simp, mfld_simps, push]
theorem mem_ofPred {x : α} {p : α → Prop} : (x ∈ {y | p y}) = p x := rfl
@[deprecated (since := "2026-08-12")] alias mem_ofPred_eq := mem_ofPred
```
Note that the lemma with iff is unusable by `dsimp`. |
tech debt
awaiting-zulip
merge-conflict
|
1015/1018 |
Archive/Imo/Imo1988Q6.lean,Archive/Imo/Imo2008Q2.lean,Archive/Imo/Imo2024Q3.lean,Archive/Sensitivity.lean,Archive/Wiedijk100Theorems/AreaOfACircle.lean,Archive/Wiedijk100Theorems/BallotProblem.lean,Archive/Wiedijk100Theorems/CubingACube.lean,Archive/ZagierTwoSquares.lean,Counterexamples/AharoniKorman.lean,Counterexamples/Phillips.lean,Counterexamples/SorgenfreyLine.lean,Mathlib/Algebra/AffineMonoid/Irreducible.lean,Mathlib/Algebra/Algebra/NonUnitalSubalgebra.lean,Mathlib/Algebra/Algebra/Spectrum/Pi.lean,Mathlib/Algebra/Algebra/Spectrum/Quasispectrum.lean,Mathlib/Algebra/Algebra/Subalgebra/Basic.lean,Mathlib/Algebra/BigOperators/Associated.lean,Mathlib/Algebra/Category/Ring/Topology.lean,Mathlib/Algebra/Group/Subgroup/Basic.lean,Mathlib/Algebra/Group/Submonoid/Basic.lean,Mathlib/Algebra/Group/Submonoid/Defs.lean,Mathlib/Algebra/GroupWithZero/NonZeroDivisors.lean,Mathlib/Algebra/Homology/HomotopyCategory/HomComplexCohomology.lean,Mathlib/Algebra/Lie/Abelian.lean,Mathlib/Algebra/Lie/Basis/Base.lean,Mathlib/Algebra/Lie/Basis/Basic.lean,Mathlib/Algebra/Lie/Character.lean,Mathlib/Algebra/Lie/IdealOperations.lean,Mathlib/Algebra/Lie/InvariantForm.lean,Mathlib/Algebra/Lie/LieTheorem.lean,Mathlib/Algebra/Lie/Semisimple/Basic.lean,Mathlib/Algebra/Lie/Solvable.lean,Mathlib/Algebra/Lie/Subalgebra.lean,Mathlib/Algebra/Lie/Submodule.lean,Mathlib/Algebra/Lie/Weights/Cartan.lean,Mathlib/Algebra/Lie/Weights/Killing.lean,Mathlib/Algebra/Module/Submodule/Invariant.lean,Mathlib/Algebra/Module/ZLattice/Basic.lean,Mathlib/Algebra/Module/ZLattice/Covolume.lean,Mathlib/Algebra/Notation/Support.lean,Mathlib/Algebra/Order/Antidiag/Nat.lean,Mathlib/Algebra/Order/Archimedean/IndicatorCard.lean,Mathlib/Algebra/Order/CompleteField.lean,Mathlib/Algebra/Order/Group/Ideal.lean,Mathlib/Algebra/Order/Group/Pointwise/Interval.lean,Mathlib/Algebra/Order/Quantale.lean,Mathlib/Algebra/Order/Rearrangement.lean,Mathlib/Algebra/Polynomial/EraseLead.lean,Mathlib/Algebra/Star/Unitary.lean,Mathlib/AlgebraicGeometry/EllipticCurve/Affine/Point.lean,Mathlib/AlgebraicGeometry/Morphisms/Affine.lean,Mathlib/AlgebraicGeometry/ProjectiveSpectrum/Topology.lean,Mathlib/AlgebraicTopology/SimplicialSet/Boundary.lean,Mathlib/AlgebraicTopology/SimplicialSet/Simplices.lean,Mathlib/AlgebraicTopology/SimplicialSet/StdSimplex.lean,Mathlib/Analysis/Analytic/Composition.lean,Mathlib/Analysis/Analytic/Constructions.lean,Mathlib/Analysis/Analytic/Inverse.lean,Mathlib/Analysis/Analytic/Order.lean,Mathlib/Analysis/Asymptotics/Lemmas.lean,Mathlib/Analysis/BoxIntegral/Basic.lean,Mathlib/Analysis/BoxIntegral/Partition/Filter.lean,Mathlib/Analysis/BoxIntegral/Partition/Split.lean,Mathlib/Analysis/BoxIntegral/UnitPartition.lean,Mathlib/Analysis/CStarAlgebra/ContinuousFunctionalCalculus/Continuity.lean,Mathlib/Analysis/CStarAlgebra/ContinuousFunctionalCalculus/Order.lean,Mathlib/Analysis/CStarAlgebra/ContinuousFunctionalCalculus/Range.lean,Mathlib/Analysis/CStarAlgebra/ContinuousFunctionalCalculus/Unitary.lean,Mathlib/Analysis/CStarAlgebra/Extreme.lean,Mathlib/Analysis/CStarAlgebra/Spectrum.lean,Mathlib/Analysis/CStarAlgebra/Unitary/Connected.lean,Mathlib/Analysis/Calculus/BumpFunction/SmoothApprox.lean,Mathlib/Analysis/Calculus/Deriv/Inv.lean,Mathlib/Analysis/Calculus/FDeriv/Measurable.lean,Mathlib/Analysis/Calculus/FDeriv/Symmetric.lean,Mathlib/Analysis/Calculus/LineDeriv/Basic.lean,Mathlib/Analysis/Calculus/ParametricIntegral.lean,Mathlib/Analysis/Calculus/SmoothSeries.lean,Mathlib/Analysis/Calculus/TangentCone/Basic.lean,Mathlib/Analysis/Complex/AbelLimit.lean,Mathlib/Analysis/Complex/Basic.lean,Mathlib/Analysis/Complex/BorelCaratheodory.lean,Mathlib/Analysis/Complex/PhragmenLindelof.lean,Mathlib/Analysis/Convex/Caratheodory.lean,Mathlib/Analysis/Convex/Combination.lean,Mathlib/Analysis/Convex/Deriv.lean,Mathlib/Analysis/Convex/DoublyStochasticMatrix.lean,Mathlib/Analysis/Convex/Extrema.lean,Mathlib/Analysis/Convex/Gauge.lean,Mathlib/Analysis/Convex/Quasiconvex.lean,Mathlib/Analysis/Convex/Segment.lean,Mathlib/Analysis/Convex/SimplicialComplex/AffineIndependentUnion.lean,Mathlib/Analysis/Convex/StdSimplex.lean,Mathlib/Analysis/Distribution/TemperateGrowth.lean,Mathlib/Analysis/InnerProductSpace/Defs.lean,Mathlib/Analysis/InnerProductSpace/LinearPMap.lean,Mathlib/Analysis/LocallyConvex/BalancedCoreHull.lean,Mathlib/Analysis/LocallyConvex/Polar.lean,Mathlib/Analysis/Matrix/Order.lean,Mathlib/Analysis/MeanInequalities.lean |
510 |
37 |
['Parcly-Taxel', 'eric-wieser', 'github-actions', 'grunweg', 'mathlib-merge-conflicts'] |
nobody |
0-12010 3 hours ago |
5-43925 5 days ago |
8-929 8 days |
0 |
| 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 |
blocks |
| 42561 |
SnirBroshi author:SnirBroshi |
feat(Order/RelSeries): order series by refinement |
Define a partial order on `RelSeries`, add basic lemmas for the operations (e.g. `p < p.append q`), and relate to `IsChain` on sets.
This lets us spell "maximal chain" using series.
---
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|
tech debt
t-order
|
150/6 |
Mathlib/Order/RelSeries.lean |
1 |
1 |
['github-actions'] |
nobody |
49-54464 1 month ago |
63-51931 63 days ago |
63-64548 63 days |
0 |
| 43095 |
plp127 author:plp127 |
chore(Data/PFunctor): reduce defeq abuse around `PFunctor.W` |
Reduce the defeq abuse around `PFunctor.W` by adding some API.
---
- [x] depends on: #43056
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|
t-data
tech debt
|
88/52 |
Mathlib/Data/PFunctor/Multivariate/W.lean,Mathlib/Data/PFunctor/Univariate/Basic.lean,Mathlib/Data/QPF/Univariate/Basic.lean |
3 |
2 |
['github-actions', 'mathlib-dependent-issues'] |
nobody |
37-11653 1 month ago |
37-22483 37 days ago |
37-23290 37 days |
0 |
| 43781 |
vlad902 author:vlad902 |
chore(AffineSpace/Independent): remove two `backward.isDefEq.respectTransparency` |
---
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|
t-algebra
tech debt
label:t-algebra$ |
3/7 |
Mathlib/LinearAlgebra/AffineSpace/Independent.lean |
1 |
1 |
['github-actions'] |
nobody |
27-8107 27 days ago |
27-10468 27 days ago |
27-10438 27 days |
0 |
| 43857 |
vihdzp author:vihdzp |
feat: split `transfiniteIterate` into `sup` and `inf` versions |
We deprecate `transfiniteIterate` and create `supTransfiniteIterate` and `infTransfiniteIterate` in its place. One of them uses suprema to compute the value at limit points, and the other uses infima.
The plan is to then use both of these definitions to deprecate `OrdinalApprox.lfpApprox` and `OrdinalApprox.gfpApprox`, which are simply specializations of these.
---
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|
tech debt
t-order
|
177/139 |
Mathlib/CategoryTheory/Abelian/GrothendieckCategory/EnoughInjectives.lean,Mathlib/CategoryTheory/ObjectProperty/LimitsClosure.lean,Mathlib/CategoryTheory/Presentable/SharplyLT/Basic.lean,Mathlib/Order/TransfiniteIteration.lean |
4 |
1 |
['github-actions'] |
nobody |
23-57584 23 days ago |
24-63617 24 days ago |
24-64478 24 days |
0 |
| 27050 |
BoltonBailey author:BoltonBailey |
doc(Control/Monad/Cont): add docstrings |
Split of #25917. This PR adds docstrings to this file.
This documentation was written by a few versions of Claude (Claude 3.5 Sonnet and Fable 5) , with human supervision.
---
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|
t-data
LLM-generated
tech debt
|
64/22 |
Mathlib/Control/Monad/Cont.lean,scripts/nolints.json |
2 |
10 |
['BoltonBailey', 'eric-wieser', 'github-actions', 'mathlib-merge-conflicts'] |
nobody |
23-7 23 days ago |
23-3552 23 days ago |
24-1563 24 days |
0 |
| 44026 |
kim-em author:kim-em |
chore: remove backward.privateInPublic in category theory, topology and analysis |
This PR removes the `backward.privateInPublic` option in 6 files across category theory, topology and analysis. In each case a private definition appeared in the statement of a public declaration, so it was already part of the public interface in all but name. The fix is to drop `private` from those definitions (and from the auxiliary definitions their bodies depend on in exposed sections), adding docstrings where they were missing. In `Analysis/InnerProductSpace/OfNorm` the auxiliary inner product `inner_` moves into the `InnerProductSpaceable` namespace rather than becoming a root-level name; the public lemmas `inner_.norm_sq`, `inner_.conj_symm` and `Continuous.inner_` already carried its name. In `Topology/Category/Compactum` the helper `cl` gets a mathematical docstring, and the two lemmas about it that are only used in proofs stay private.
Files where a private *lemma* appeared in a public statement, and the files with file-wide `public section` restructuring, are handled in #44032. Names are otherwise kept as they were; suggestions for better names are welcome but are not needed for this PR.
🤖 Prepared with Claude Code |
tech debt |
19/63 |
Mathlib/Analysis/InnerProductSpace/OfNorm.lean,Mathlib/CategoryTheory/Monoidal/Internal/FunctorCategory.lean,Mathlib/FieldTheory/Galois/Profinite.lean,Mathlib/Topology/Category/Compactum.lean,Mathlib/Topology/Category/TopCat/Limits/Konig.lean,Mathlib/Topology/MetricSpace/GromovHausdorff.lean |
6 |
1 |
['github-actions'] |
nobody |
19-46368 19 days ago |
19-61100 19 days ago |
19-61070 19 days |
0 |
| 44024 |
kim-em author:kim-em |
chore: remove backward.privateInPublic in algebra, combinatorics and number theory |
This PR removes the `backward.privateInPublic` option in 9 files across algebra, combinatorics, number theory, order theory and set theory. In each case a private definition appeared in the statement of a public declaration, so it was already part of the public interface in all but name. The fix is to drop `private` from those definitions, adding docstrings where they were missing. In `Algebra/EuclideanDomain/Basic` the opposite direction is cleaner: the only consumer `xgcdAux_P` becomes private as well, matching the existing setup in `Data/Int/GCD`. In `Combinatorics/SetFamily/FourFunctions` the definition becomes `Finset.collapse` rather than a root-level name. In `Combinatorics/SetFamily/KruskalKatona` the predicate is marked `@[expose]`, since the file's `public section` is not exposed and the `DecidableRel` instance needs to unfold it.
Files where a private *lemma* appeared in a public statement are handled by wrapping the use site instead, in #44032. Names are kept as they were (for example `Pell.d`); suggestions for better names are welcome but are not needed for this PR.
🤖 Prepared with Claude Code |
tech debt |
14/107 |
Mathlib/Algebra/EuclideanDomain/Basic.lean,Mathlib/Algebra/FreeAlgebra.lean,Mathlib/Combinatorics/SetFamily/FourFunctions.lean,Mathlib/Combinatorics/SetFamily/KruskalKatona.lean,Mathlib/Combinatorics/SimpleGraph/Regularity/Increment.lean,Mathlib/GroupTheory/FreeGroup/NielsenSchreier.lean,Mathlib/NumberTheory/PellMatiyasevic.lean,Mathlib/RingTheory/GradedAlgebra/HomogeneousLocalization.lean,Mathlib/SetTheory/Ordinal/Notation.lean |
9 |
2 |
['github-actions', 'grunweg'] |
nobody |
19-44706 19 days ago |
19-44754 19 days ago |
19-49633 19 days |
0 |
| 44031 |
kim-em author:kim-em |
chore: apply mergeWithGrind suggestions from the weekly linting report |
This PR applies the `linter.tacticAnalysis.mergeWithGrind` suggestions from the weekly linting report of 2026-09-21 (https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/Weekly.20linting.20log/near/625644995): in each flagged proof the tactic preceding a terminal `grind` call is redundant and is removed. In `Combinatorics/SimpleGraph/Acyclic.lean` this also restores the original proof recorded in an adaptation note, which now works again.
Three of the 22 suggestions were false positives and are not applied: under `all_goals tac; grind` the linter only tests the first goal, and the other goals still need `tac` (`Combinatorics/SimpleGraph/Extremal/Turan.lean` and two lemmas in `Analysis/SpecialFunctions/Log/Basic.lean`).
🤖 Prepared with Claude Code |
tech debt |
10/46 |
Mathlib/Algebra/QuadraticAlgebra/Discriminant.lean,Mathlib/Algebra/Star/NonUnitalSubalgebra.lean,Mathlib/AlgebraicTopology/SimplexCategory/ToMkOne.lean,Mathlib/AlgebraicTopology/SimplicialObject/ChainHomotopy.lean,Mathlib/Analysis/Calculus/Taylor.lean,Mathlib/Analysis/SpecialFunctions/Integrability/Basic.lean,Mathlib/Combinatorics/SimpleGraph/Acyclic.lean,Mathlib/Combinatorics/SimpleGraph/Maps.lean,Mathlib/Combinatorics/SimpleGraph/Tutte.lean,Mathlib/Data/List/Nodup.lean,Mathlib/Data/Multiset/Find.lean,Mathlib/MeasureTheory/VectorMeasure/IntegrationByParts.lean,Mathlib/NumberTheory/FundamentalDiscriminant.lean,Mathlib/NumberTheory/Height/EllipticCurve.lean,Mathlib/NumberTheory/LucasLehmer.lean,Mathlib/Topology/Instances/AddCircle/Defs.lean |
16 |
3 |
['github-actions', 'grunweg', 'leanprover-radar'] |
nobody |
19-43164 19 days ago |
19-46653 19 days ago |
19-46923 19 days |
0 |
| 43885 |
plp127 author:plp127 |
refactor: reduce defeq abuse in `Representation.asModule` |
Reduce defeq abuse around `Representation.asModule` by adding explicitly uses of `Representation.asModuleEquiv` to convert between `V` and `ρ.asModule`. Also reorganize some `@[simp]` lemmas and fix some naming issues.
---
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|
t-algebra
tech debt
label:t-algebra$ |
70/88 |
Mathlib/RepresentationTheory/Basic.lean,Mathlib/RepresentationTheory/Intertwining.lean,Mathlib/RepresentationTheory/Rep/Iso.lean,Mathlib/RepresentationTheory/Submodule.lean,Mathlib/RepresentationTheory/Subrepresentation.lean |
5 |
19 |
['JX-Mo', 'github-actions', 'plp127'] |
nobody |
19-37020 19 days ago |
20-13087 20 days ago |
24-8912 24 days |
0 |
| 43434 |
Parcly-Taxel author:Parcly-Taxel |
refactor: remove `set_option` in `ZagierTwoSquares` |
I refactor one of my very first non-porting contributions to mathlib by changing `zagierSet` to a structure `Zagier.Triple` and rewriting the whole proof to avoid `set_option`s. This required changing the type of `card_fixedPoints_modEq` to accept just `α → α` rather than `Function.End α`.
No deprecations are added since this a leaf file in Archive. |
t-number-theory
tech debt
t-group-theory
|
112/169 |
Archive/ZagierTwoSquares.lean,Mathlib/GroupTheory/Perm/Cycle/Type.lean |
2 |
3 |
['Parcly-Taxel', 'github-actions', 'jcommelin'] |
nobody |
19-33539 19 days ago |
32-56754 32 days ago |
36-34173 36 days |
0 |
| 41484 |
FernandoChu author:FernandoChu |
feat(CategoryTheory): kan extensions from isos |
This PR constructs lifts out of isomorphisms of 1-cells, and shows that being (abs) Kan is preserved by this. This is done for all four notions of left/right lifts/extensions.
This is needed for the oo-cosmos project.
----
**AI disclosure**. Claude was used in defining the API for the left extension case. After manually fixing its bad proofs/definitions/docstrings, Claude was later asked to replicate this for the other three cases, which I again finetuned. |
t-category-theory
LLM-generated
large-import
maintainer-merge
tech debt
|
413/79 |
Mathlib/CategoryTheory/Bicategory/Extension.lean,Mathlib/CategoryTheory/Bicategory/Kan/IsKan.lean |
2 |
24 |
['FernandoChu', 'github-actions', 'grunweg', 'robin-carlier'] |
nobody |
18-76975 18 days ago |
40-34771 40 days ago |
92-41025 92 days |
1 |
| 43566 |
kim-em author:kim-em |
refactor(CategoryTheory): insert missing functor associators and unitors |
This PR inserts the functor associators and unitors that Mathlib currently omits, or applies in the wrong direction, when it identifies `(F ⋙ G) ⋙ H` with `F ⋙ G ⋙ H` or `𝟭 C ⋙ F` with `F` by unfolding `Functor.comp` and `Functor.id`. None of these changes are *necessary*, but all reduce some defeq abuse that hopefully will make life easier in future.
It is extracted from Paul Reichert's experiment making `Functor.comp` and `Functor.id` `instance_reducible` with a semireducible `map` field (https://github.com/leanprover-community/mathlib4/compare/master...leanprover-community:mathlib4-nightly-testing:datokrat/functorcomp, discussed at https://leanprover.zulipchat.com/#narrow/channel/113488-general/topic/backward.2EisDefEq.2ErespectTransparency), keeping only the bracketing and unit fixes so that future experiments of this kind have less to repair. The `Functor.comp_map` proof changes from that branch are not included, and the corresponding changes for (pre)sheaves of modules are in a separate PR.
The notable API changes are: `limit.pre_pre`, `post_post`, `pre_post` and their duals now relate the two bracketings through `HasLimit.isoOfNatIso (Functor.associator _ _ _)`; `StructuredArrow.final_map₂_id` takes `β : T ⋙ S ⟶ 𝟭 C ⋙ T'`; and `Join.mkNatTrans` and `mkNatIso` carry associators in their (autoparam) compatibility hypothesis.
🤖 Prepared with Claude Code |
tech debt |
254/128 |
Mathlib/AlgebraicGeometry/ColimitsOver.lean,Mathlib/CategoryTheory/Abelian/GrothendieckCategory/Subobject.lean,Mathlib/CategoryTheory/Comma/Final.lean,Mathlib/CategoryTheory/Comma/StructuredArrow/Basic.lean,Mathlib/CategoryTheory/Equivalence.lean,Mathlib/CategoryTheory/Filtered/Final.lean,Mathlib/CategoryTheory/Functor/Derived/Adjunction.lean,Mathlib/CategoryTheory/Functor/KanExtension/Basic.lean,Mathlib/CategoryTheory/Join/Basic.lean,Mathlib/CategoryTheory/Limits/Constructions/Over/Connected.lean,Mathlib/CategoryTheory/Limits/Final.lean,Mathlib/CategoryTheory/Limits/FunctorCategory/Basic.lean,Mathlib/CategoryTheory/Limits/HasLimits.lean,Mathlib/CategoryTheory/Limits/IndYoneda.lean,Mathlib/CategoryTheory/Limits/Preserves/Shapes/Pullbacks.lean,Mathlib/CategoryTheory/Limits/Shapes/Opposites/Pullbacks.lean,Mathlib/CategoryTheory/Limits/VanKampen.lean,Mathlib/CategoryTheory/Limits/Weighted/PreservesLimit.lean,Mathlib/CategoryTheory/Localization/Adjunction.lean,Mathlib/CategoryTheory/Monad/Limits.lean,Mathlib/CategoryTheory/Monoidal/Cartesian/Basic.lean,Mathlib/CategoryTheory/Monoidal/Multifunctor.lean,Mathlib/CategoryTheory/Opposites.lean,Mathlib/CategoryTheory/Shift/Induced.lean,Mathlib/CategoryTheory/Whiskering.lean |
25 |
15 |
['github-actions', 'kim-em', 'leanprover-radar', 'robin-carlier'] |
nobody |
18-58552 18 days ago |
18-58552 18 days ago |
21-67488 21 days |
0 |
| 43848 |
plp127 author:plp127 |
chore(Data/Nat/Init): rename recursor arguments |
Name the motive `motive` and name the minor premises according to their contents.
---
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- Nat.bit1_add_bit1
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|
t-data
tech debt
|
149/149 |
Archive/Imo/Imo1981Q3.lean,Archive/Imo/Imo2024Q3.lean,Mathlib/Algebra/ContinuedFractions/Euler.lean,Mathlib/Algebra/Polynomial/Sequence.lean,Mathlib/Analysis/Calculus/ContDiff/Bounds.lean,Mathlib/Analysis/Hofer.lean,Mathlib/Combinatorics/Enumerative/Catalan/Tree.lean,Mathlib/Data/Fin/Basic.lean,Mathlib/Data/Nat/Init.lean,Mathlib/FieldTheory/IsRealClosed/Basic.lean,Mathlib/GroupTheory/GroupAction/Jordan.lean,Mathlib/GroupTheory/Nilpotent.lean,Mathlib/LinearAlgebra/Eigenspace/Triangularizable.lean,Mathlib/LinearAlgebra/Finsupp/Pi.lean,Mathlib/LinearAlgebra/Multilinear/Basic.lean,Mathlib/NumberTheory/DiophantineApproximation/Basic.lean,Mathlib/NumberTheory/FLT/Polynomial.lean,Mathlib/NumberTheory/ModularForms/LevelOne/DimensionFormula.lean,Mathlib/NumberTheory/Pell.lean,Mathlib/NumberTheory/Primorial.lean,Mathlib/NumberTheory/RamificationInertia/Basic.lean,Mathlib/Order/KrullDimension.lean,Mathlib/Probability/Kernel/IonescuTulcea/Traj.lean,Mathlib/RingTheory/Adjoin/PowerBasis.lean,Mathlib/RingTheory/AdjoinRoot.lean,Mathlib/RingTheory/Etale/QuasiFinite.lean,Mathlib/RingTheory/Ideal/KrullsHeightTheorem.lean,Mathlib/RingTheory/IntegralClosure/IsIntegral/AlmostIntegral.lean,Mathlib/RingTheory/Polynomial/Eisenstein/IsIntegral.lean,Mathlib/RingTheory/Polynomial/IsIntegral.lean,Mathlib/RingTheory/Polynomial/Resultant/Basic.lean,Mathlib/RingTheory/WittVector/Defs.lean,Mathlib/RingTheory/WittVector/StructurePolynomial.lean,Mathlib/RingTheory/ZariskisMainTheorem.lean,Mathlib/Topology/CWComplex/Classical/Basic.lean,Mathlib/Topology/Metrizable/Uniformity.lean |
36 |
1 |
['Parcly-Taxel', 'github-actions'] |
nobody |
18-7900 18 days ago |
24-69387 24 days ago |
25-844 25 days |
0 |
| 44124 |
joelriou author:joelriou |
feat(Algebra/Homology/Embedding): more API for the stupid truncations |
We define the monomorphism `K.stupidTrunc e ⟶ K` when the embedding of complex shapes `e` satisfies `e.IsTruncGE`. (We also proceed to the dual definition.)
---
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|
t-category-theory
t-algebra
tech debt
label:t-algebra$ |
205/13 |
Mathlib/Algebra/Homology/Embedding/Restriction.lean,Mathlib/Algebra/Homology/Embedding/StupidTrunc.lean |
2 |
3 |
['github-actions', 'joelriou', 'themathqueen'] |
nobody |
17-23739 17 days ago |
17-32857 17 days ago |
17-32924 17 days |
1 |
| 43856 |
BoltonBailey author:BoltonBailey |
chore: rename `ENNReal.toReal_mono'` |
This PR addresses tech debt by renaming `ENNReal.toReal_mono'` to `ENNReal.toReal_mono_of_top_imp_top` (and similarly renaming the related `ENNReal.toReal_le_add'`). This change makes the naming scheme more similar to `ENNReal.le_of_top_imp_top_of_toNNReal_le`
I chose these names myself, but used LLM assistance to scan the library for instances of the lemmas.
---
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|
t-topology
tech debt
|
16/10 |
Mathlib/Basic/ENNReal/Operations.lean,Mathlib/Basic/ENNReal/Real.lean,Mathlib/Topology/MetricSpace/Bounded.lean,Mathlib/Topology/MetricSpace/HausdorffDistance.lean,Mathlib/Topology/MetricSpace/Thickening.lean,scripts/nolints_prime_decls.txt |
6 |
4 |
['BoltonBailey', 'github-actions', 'themathqueen'] |
nobody |
16-15539 16 days ago |
24-76259 24 days ago |
24-76229 24 days |
0 |
| 42402 |
justus-springer author:justus-springer |
refactor(AlgebraicGeometry/Birational): phase out `Scheme.Over` for rational maps |
Split off from #40871
We refactor `PartialMap.IsOver` to not use `Scheme.Hom.IsOver`, which is being phased out. We still keep it as class with one field for now (as opposed to making it an abbrev for the morphism equation directly). This is because I think it's still useful to have instances for `PartialMap.restrict` and `PartialMap.toRationalMap`. However, some things which used to be instances (`isOver_comp` and `IsOver.compHom`) now need to be lemmas.
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|
t-algebraic-geometry
tech debt
|
100/86 |
Mathlib/AlgebraicGeometry/Birational/Composition.lean,Mathlib/AlgebraicGeometry/Birational/RationalMap.lean |
2 |
3 |
['Brian-Nugent', 'github-actions', 'justus-springer'] |
nobody |
15-32608 15 days ago |
68-30952 68 days ago |
68-30922 68 days |
1 |
| 40841 |
TJHeeringa author:TJHeeringa |
chore(Topology/Algebra): rename .equivOfInverse to .ofContinuousLinearMap |
Renames `ContinuousLinearEquiv.equivOfInverse` and `ContinuousLinearEquiv.equivOfInverse'` to `ContinuousLinearEquiv.ofContinuousLinearMap` and `ContinuousLinearEquiv.ofContinuousLinearMap'`. It reorders the order of arguments to match that of `ofLinearMap`.
---
Addresses the ToDO `*ToDo*: Improve the naiming to make it match `LinearMap.ofLinear`.` for `ContinuousLinearEquiv.equivOfInverse`.
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[](https://gitpod.io/from-referrer/)
|
t-topology
tech debt
|
80/25 |
Mathlib/Analysis/InnerProductSpace/TensorProduct.lean,Mathlib/Topology/Algebra/Module/ContinuousLinearMap/Invertible.lean,Mathlib/Topology/Algebra/Module/Equiv/Basic.lean |
3 |
83 |
['TJHeeringa', 'Whysoserioushah', 'b-mehta', 'github-actions', 'j-loreaux', 'mathlib-dependent-issues', 'mathlib-merge-conflicts', 'themathqueen'] |
PatrickMassot assignee:PatrickMassot |
15-9928 15 days ago |
15-9928 15 days ago |
31-50519 31 days |
0 |
| 44227 |
mitchell-horner author:mitchell-horner |
chore(Combinatorics/SimpleGraph): remove `backward.isDefEq.respectTransparency.types` from `ErdosStoneSimonovits` and golf theorems |
Removes `backward.isDefEq.respectTransparency.types` from ErdosStoneSimonovits.lean and golfs several theorems.
---
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|
tech debt
t-combinatorics
maintainer-merge
|
58/68 |
Mathlib/Combinatorics/SimpleGraph/CompleteMultipartite.lean,Mathlib/Combinatorics/SimpleGraph/Extremal/ErdosStoneSimonovits.lean |
2 |
13 |
['SnirBroshi', 'github-actions', 'grunweg', 'mitchell-horner'] |
nobody |
12-77391 12 days ago |
13-57844 13 days ago |
13-63994 13 days |
0 |
| 43569 |
kim-em author:kim-em |
refactor(ModuleCat): state pushforward coherence without identifying functor bracketings |
This PR makes the pushforward of (pre)sheaves of modules along the identity functor and along a composition of functors honestly typed. Currently `pushforwardId` takes `𝟙 S` at the type `S ⟶ (𝟭 C).op ⋙ S` and `pushforwardComp` takes `φ ≫ whiskerLeft F.op ψ` at the type `S ⟶ (F ⋙ G).op ⋙ T`, which only elaborate because `Functor.comp`, `Functor.id` and `Functor.op` unfold. The new `pushforwardIdHom` and `pushforwardCompHom` are the unitor and associator composed with `Functor.opId`/`Functor.opComp` (see `pushforwardIdHom_eq` and `pushforwardCompHom_eq`), and the associativity and unitality isomorphisms of pushforward and pullback are transported along the functor associator and unitors through the new `pushforwardCongr₂`/`pullbackCongr₂` (added at the presheaf level, together with `pushforwardCongr`, `pushforwardNatTrans` and `pushforwardNatIso`). The scheme-level pseudofunctor coherence lemmas in `AlgebraicGeometry.Modules.Sheaf` are reproved from these, and `Adjunction.leftAdjointCompIso_trans` is added for that purpose.
It is extracted from Paul Reichert's experiment making `Functor.comp` and `Functor.id` `instance_reducible` (https://github.com/leanprover-community/mathlib4/compare/master...leanprover-community:mathlib4-nightly-testing:datokrat/functorcomp, discussed at https://leanprover.zulipchat.com/#narrow/channel/113488-general/topic/backward.2EisDefEq.2ErespectTransparency), and is the (pre)sheaf-of-modules half of https://github.com/leanprover-community/mathlib4/pull/43566; it is independent of that PR.
🤖 Prepared with Claude Code |
tech debt
t-category-theory
|
480/131 |
Mathlib/Algebra/Category/ModuleCat/Presheaf.lean,Mathlib/Algebra/Category/ModuleCat/Presheaf/Pullback.lean,Mathlib/Algebra/Category/ModuleCat/Presheaf/Pushforward.lean,Mathlib/Algebra/Category/ModuleCat/Sheaf/PullbackContinuous.lean,Mathlib/Algebra/Category/ModuleCat/Sheaf/PushforwardContinuous.lean,Mathlib/Algebra/Category/ModuleCat/Sheaf/Quasicoherent.lean,Mathlib/AlgebraicGeometry/Modules/Sheaf.lean,Mathlib/CategoryTheory/Adjunction/CompositionIso.lean,Mathlib/Topology/Sheaves/Module.lean |
9 |
2 |
['github-actions', 'mathlib-merge-conflicts'] |
nobody |
12-71747 12 days ago |
12-72886 12 days ago |
30-81525 30 days |
0 |
| 43570 |
kim-em author:kim-em |
refactor(AlgebraicGeometry/Modules): transport pushforward along Opens.map functoriality isos |
This PR defines `Scheme.Modules.pushforwardId` and `pushforwardComp` by transporting the sheaf-of-modules isomorphisms along the existing `Opens.mapId` and `Opens.mapComp` (via `SheafOfModules.pushforwardCongr₂`) rather than by identifying `Opens.map (𝟙 X).base` with `𝟭` and `Opens.map (f ≫ g).base` with `Opens.map g.base ⋙ Opens.map f.base` by unfolding `Opens.map`. The componentwise simp lemmas become `M.presheaf.map_id` rather than `rfl`, and the pseudofunctor coherence fields are discharged explicitly since `cat_disch` no longer finds them by reflexivity. Also adds the simp lemma `Adj.eqToHom_τl`.
It is extracted from Paul Reichert's experiment making `Functor.comp` and `Functor.id` `instance_reducible` (https://github.com/leanprover-community/mathlib4/compare/master...leanprover-community:mathlib4-nightly-testing:datokrat/functorcomp, discussed at https://leanprover.zulipchat.com/#narrow/channel/113488-general/topic/backward.2EisDefEq.2ErespectTransparency), and depends on https://github.com/leanprover-community/mathlib4/pull/43569. The diff relative to that PR is https://github.com/kim-em/mathlib4/compare/associators-sheaves...opens-map.
🤖 Prepared with Claude Code |
tech debt |
516/139 |
Mathlib/Algebra/Category/ModuleCat/Presheaf.lean,Mathlib/Algebra/Category/ModuleCat/Presheaf/Pullback.lean,Mathlib/Algebra/Category/ModuleCat/Presheaf/Pushforward.lean,Mathlib/Algebra/Category/ModuleCat/Sheaf/PullbackContinuous.lean,Mathlib/Algebra/Category/ModuleCat/Sheaf/PushforwardContinuous.lean,Mathlib/Algebra/Category/ModuleCat/Sheaf/Quasicoherent.lean,Mathlib/AlgebraicGeometry/Modules/Sheaf.lean,Mathlib/CategoryTheory/Adjunction/CompositionIso.lean,Mathlib/CategoryTheory/Bicategory/Adjunction/Adj.lean,Mathlib/Topology/Sheaves/Module.lean |
10 |
2 |
['github-actions', 'mathlib-merge-conflicts'] |
nobody |
12-71510 12 days ago |
12-72877 12 days ago |
30-80933 30 days |
0 |
| 44093 |
grunweg author:grunweg |
chore: fix more congruence lemmas |
A `congr` should vary all its explicit arguments, not just some of them. This issue is documented on the docstring of the `@[congr]` attribute, but there is no warning when you write a bad `@[congr]` lemma.
Whenever a lemma seemed used sufficiently often, we fixed the congruence lemma by adding a new variant, with a primed name and the additional arguments varied also.
Found by the linter in #43692; these should be all remaining bad lemmas in mathlib.
---
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|
t-algebra
tech debt
label:t-algebra$ |
74/38 |
Mathlib/Algebra/MonoidAlgebra/Module.lean,Mathlib/Data/Finset/Filter.lean,Mathlib/Data/Finset/Fold.lean,Mathlib/Data/Finsupp/Basic.lean,Mathlib/Data/List/Basic.lean,Mathlib/Data/List/Find.lean,Mathlib/Data/List/Zip.lean,Mathlib/Data/Multiset/Bind.lean,Mathlib/Data/Multiset/Filter.lean,Mathlib/Data/Multiset/Find.lean,Mathlib/Data/Set/Image.lean,Mathlib/Data/Set/NAry.lean,Mathlib/Data/Sym/Basic.lean,Mathlib/Data/Sym/Card.lean,Mathlib/Data/Sym/Sym2.lean,Mathlib/Geometry/Convex/ConvexSpace/Defs.lean,Mathlib/LinearAlgebra/Finsupp/Supported.lean,Mathlib/LinearAlgebra/QuadraticForm/Signature.lean |
18 |
5 |
['github-actions', 'grunweg', 'j-loreaux', 'mathlib-merge-conflicts'] |
nobody |
12-24672 12 days ago |
12-30693 12 days ago |
15-26219 15 days |
0 |
| 44363 |
Parcly-Taxel author:Parcly-Taxel |
chore(Order): remove some `set_option`s |
* Remove `set_option`s from `Order.Nucleus` and `Order.OmegaCompletePartialOrder`.
* Remove `unusedVariables` options from all files in `Order` that have them. |
tech debt
t-order
|
77/102 |
Mathlib/Order/Booleanisation.lean,Mathlib/Order/Closure.lean,Mathlib/Order/LiminfLimsup.lean,Mathlib/Order/Nucleus.lean,Mathlib/Order/OmegaCompletePartialOrder.lean,Mathlib/Order/OrderDual.lean,Mathlib/Order/Sum/Lattice.lean |
7 |
1 |
['github-actions'] |
nobody |
10-18808 10 days ago |
10-28478 10 days ago |
10-28448 10 days |
0 |
| 44396 |
mathlib-splicebot author:mathlib-splicebot |
chore(Analysis/Complex/UnitDisc/Basic): fix instance diamond |
There were two natural number power instances which differed at implicit transparency.
The `NatPowAssoc` instance is not necessary, hence can be removed.
Found by the linter in #38781.
Co-authored-by: Jovan Gerbscheid <jovan.gerbscheid@gmail.com>
-------- |
tech debt
t-analysis
|
11/16 |
Mathlib/Analysis/Complex/UnitDisc/Basic.lean |
1 |
3 |
['github-actions', 'grunweg', 'leanprover-radar'] |
nobody |
9-10980 9 days ago |
9-12676 9 days ago |
9-12910 9 days |
0 |
| 44400 |
sgouezel author:sgouezel |
chore: fix a non-reducible diamond in `MvPowerSeries` |
The following fails before the PR, succeeds after it:
```
example : ((MvPowerSeries.instCommRingRestricted
c).toNonUnitalSemiring : NonUnitalSemiring (MvPowerSeries.Restricted S c)) =
NonUnitalCommRing.toNonUnitalCommSemiring.toNonUnitalSemiring := by
with_implicit rfl
```
---
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|
t-ring-theory
tech debt
|
4/5 |
Mathlib/RingTheory/MvPowerSeries/Restricted.lean |
1 |
1 |
['github-actions'] |
nobody |
8-84228 8 days ago |
9-8207 9 days ago |
9-8177 9 days |
0 |
| 40368 |
Sanghyeok0 author:Sanghyeok0 |
feat: add confluence predicates for relations |
This PR adds a minimal relation-level API for confluence-style properties:
* `Relation.IsDiamond`
* `Relation.IsConfluent`
* `Relation.IsChurchRosser`
It also adds the basic API connecting these predicates:
* `Relation.ReflTransGen.to_eqvGen`
* `Relation.Join.le_eqvGen`
* `Relation.IsChurchRosser.isConfluent`
* `Relation.IsConfluent.isChurchRosser`
* `Relation.IsChurchRosser.join_reflTransGen_eq_eqvGen`
The main downstream application is the polynomial-reduction development in
#41475. There, polynomial reduction is treated as an ordinary relation on
`MvPolynomial`, and these predicates are used to formulate confluence and the
Church--Rosser property.
A more general rewriting API exists in CSLib. This PR does not attempt to
upstream that API wholesale; its scope is intentionally limited to the
declarations needed by the downstream polynomial application.
The earlier version of this PR also introduced
`Relation.StronglyConfluent` and additional equivalence packaging. Those
declarations have been removed to keep this PR small and application-driven.
Reference: Becker, Weispfenning, and Kredel,
*Gröbner Bases: A Computational Approach to Commutative Algebra*.
AI usage disclosure:
I used OpenAI Codex to generate initial drafts of the definitions, theorem statements, proof scripts, and docstrings. I made the final decisions on the mathematical scope and API design, reviewed the generated code and final changes, and made a few edits to statements and docstrings.
---
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|
t-logic
new-contributor
tech debt
LLM-generated
|
103/25 |
Mathlib/GroupTheory/FreeGroup/Basic.lean,Mathlib/Logic/Relation.lean |
2 |
36 |
['Sanghyeok0', 'SnirBroshi', 'chenson2018', 'github-actions', 'mathlib-merge-conflicts'] |
joneugster assignee:joneugster |
8-77879 8 days ago |
34-8960 34 days ago |
106-204 106 days |
1 |
| 42316 |
JovanGerb author:JovanGerb |
feat: use `max`/`min` for `union`/`intersection` in `Set`, `Finset`, `ZFSet`, `Class` |
This lets us write `∪`/`∩` for sets while the underlying constant is `max`/`min`. This is a follow-up to #32983, which made the same change for `⊆`, `⊂`, `⊇` and `⊃`. The implementation for `∪`/`∩` is analogous.
The first commit contains the implementation change, and all other commits are just adaptations.
Note that there are now two different special delaborators for `max`/`min`, because we already had the delaborator that chooses between `max`/`min` and `⊔`/`⊓`. It is important that the one for `∪`/`∩` is tried first. There is no priority mechanism for delaborators: they are always executed newest to oldest. So, this PR adds a (redundant) import to ensure that this order is respected.
- I modified the delaborator for `⊔`/`⊓` so that it doesn't fire if `LinearOrder` isn't imported. Due to the extra redundant import, that is now a more common situation and I think in that situation it's better to print `max a b` instead of `a ⊔ b`.
- It is now not anymore possible to write `simp [(· ∪ ·)]` due to elaboration issues. The same also already applied to `simp [(· ⊆ ·)]`.
- Many `simp` calls had to be fixed because the `simp` set for `max`/`min` contains more lemmas than what we had for `union`/`inter`. For example, `compl_inf` and `inf_of_le_left`/`inf_of_le_right` now also apply to intersections.
- In particular `inf_of_le_left`/`inf_of_le_right` are quite slow simp lemmas, which means that this PR gives a bit of slowdown.
- A `grind` call had to be fixed because it timed out. Originally, that `grind` call was already doing too much stuff, but it didn't quite reach its limits.
- Many `@[simp]` and some `@[gcongr]` tags could be removed because they are now subsumed by more general tags.
- I removed `@[mfld_simp]` from `inter_subset_left`, as it seemed a bit weird to have it there and not on its dual or its mirror lemma.
---
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|
tech debt
large-import
t-data
|
346/426 |
Archive/Examples/Kuratowski.lean,Mathlib/Algebra/BigOperators/Finprod.lean,Mathlib/Algebra/BigOperators/Group/Finset/Basic.lean,Mathlib/Algebra/Lie/Basis/Prod.lean,Mathlib/Algebra/Module/SpanRank.lean,Mathlib/Algebra/MvPolynomial/Basic.lean,Mathlib/Algebra/Polynomial/Splits.lean,Mathlib/AlgebraicGeometry/Morphisms/UniversallyClosed.lean,Mathlib/AlgebraicGeometry/Scheme.lean,Mathlib/AlgebraicGeometry/ZariskisMainTheorem.lean,Mathlib/AlgebraicTopology/SimplicialSet/AnodyneExtensions/RelativeCellComplex.lean,Mathlib/AlgebraicTopology/SimplicialSet/Degenerate.lean,Mathlib/Analysis/Complex/ValueDistribution/LogCounting/Basic.lean,Mathlib/Analysis/Convex/Combination.lean,Mathlib/Analysis/InnerProductSpace/Projection/FiniteDimensional.lean,Mathlib/Analysis/Normed/Module/Seminorm/Basic.lean,Mathlib/Analysis/SpecialFunctions/Log/NegMulLog.lean,Mathlib/CategoryTheory/Limits/Types/Pushouts.lean,Mathlib/Combinatorics/Additive/Dissociation.lean,Mathlib/Combinatorics/Matroid/Basic.lean,Mathlib/Combinatorics/Matroid/Minor/Contract.lean,Mathlib/Combinatorics/Matroid/Minor/Order.lean,Mathlib/Combinatorics/SetFamily/Compression/UV.lean,Mathlib/Combinatorics/SetFamily/FourFunctions.lean,Mathlib/Combinatorics/SimpleGraph/AdjMatrix.lean,Mathlib/Combinatorics/SimpleGraph/LineGraph.lean,Mathlib/Combinatorics/SimpleGraph/Tutte.lean,Mathlib/Combinatorics/SimpleGraph/UniversalVerts.lean,Mathlib/Computability/TuringMachine/ToPartrec.lean,Mathlib/Data/Finmap.lean,Mathlib/Data/Finset/Basic.lean,Mathlib/Data/Finset/BooleanAlgebra.lean,Mathlib/Data/Finset/Lattice/Basic.lean,Mathlib/Data/Finset/Lattice/Lemmas.lean,Mathlib/Data/Finset/SDiff.lean,Mathlib/Data/Finset/Sups.lean,Mathlib/Data/Finset/SymmDiff.lean,Mathlib/Data/Finsupp/BigOperators.lean,Mathlib/Data/Multiset/UnionInter.lean,Mathlib/Data/Set/Basic.lean,Mathlib/Data/Set/Defs.lean,Mathlib/Data/Set/Disjoint.lean,Mathlib/Data/Set/Function.lean,Mathlib/Data/Set/Image.lean,Mathlib/Data/Set/Insert.lean,Mathlib/Data/Set/Subset.lean,Mathlib/Geometry/Manifold/IsManifold/ExtChartAt.lean,Mathlib/Geometry/Manifold/MFDeriv/Defs.lean,Mathlib/GroupTheory/CosetCover.lean,Mathlib/GroupTheory/Perm/Finite.lean,Mathlib/GroupTheory/Perm/Support.lean,Mathlib/LinearAlgebra/Basis/Exact.lean,Mathlib/LinearAlgebra/LinearIndependent/Lemmas.lean,Mathlib/Logic/Equiv/Set.lean,Mathlib/MeasureTheory/Covering/Differentiation.lean,Mathlib/MeasureTheory/Covering/LiminfLimsup.lean,Mathlib/MeasureTheory/MeasurableSpace/CountablyGenerated.lean,Mathlib/MeasureTheory/Measure/Basic.lean,Mathlib/MeasureTheory/Measure/Decomposition/Hahn.lean,Mathlib/MeasureTheory/Measure/Haar/Unique.lean,Mathlib/MeasureTheory/Measure/Typeclasses/ZeroOne.lean,Mathlib/MeasureTheory/OuterMeasure/AE.lean,Mathlib/MeasureTheory/PiSystem.lean,Mathlib/MeasureTheory/SetSemiring.lean,Mathlib/MeasureTheory/VectorMeasure/Variation/Semivariation.lean,Mathlib/NumberTheory/LSeries/ZetaZeros.lean,Mathlib/NumberTheory/WellApproximable.lean,Mathlib/Order/Birkhoff.lean,Mathlib/Order/BooleanAlgebra/Set.lean,Mathlib/Order/Bounds/Basic.lean,Mathlib/Order/Defs/Lattice.lean,Mathlib/Order/Defs/LinearOrder.lean,Mathlib/Order/Filter/Bases/Basic.lean,Mathlib/Order/Filter/Basic.lean,Mathlib/Order/Filter/Defs.lean,Mathlib/Order/Lattice/Congruence.lean,Mathlib/Order/Notation.lean,Mathlib/Order/SupIndep.lean,Mathlib/RingTheory/PolynomialLaw/Basic.lean,Mathlib/RingTheory/RegularLocalRing/Polynomial.lean,Mathlib/SetTheory/ZFC/Basic.lean,Mathlib/SetTheory/ZFC/Class.lean,Mathlib/Tactic/SetNotationForOrder.lean,Mathlib/Topology/CWComplex/Classical/Basic.lean,Mathlib/Topology/Closure.lean,Mathlib/Topology/Compactification/StoneCech.lean,Mathlib/Topology/Connected/Clopen.lean,Mathlib/Topology/Constructible.lean,Mathlib/Topology/DiscreteSubset.lean,Mathlib/Topology/NhdsWithin.lean,Mathlib/Topology/OpenPartialHomeomorph/IsImage.lean,Mathlib/Topology/Sets/Compacts.lean,Mathlib/Topology/Sets/Opens.lean,Mathlib/Topology/UrysohnsLemma.lean,MathlibTest/Attribute/ToDual.lean,MathlibTest/Delab/SupInf.lean,MathlibTest/SetNotationForOrder.lean,MathlibTest/Simps.lean,MathlibTest/Tactic/GRewrite.lean,MathlibTest/Tactic/Order.lean |
100 |
35 |
['JovanGerb', 'Multramate', 'github-actions', 'jcommelin', 'leanprover-radar', 'mathlib-merge-conflicts'] |
joneugster assignee:joneugster |
8-75818 8 days ago |
8-80911 8 days ago |
50-61118 50 days |
0 |
| 44032 |
kim-em author:kim-em |
chore: remove backward.privateInPublic by wrapping proofs with private_decl% |
This PR removes 171 uses of `backward.privateInPublic` across 37 files. Wherever a public declaration used a private lemma in a proof position, the proof is wrapped with core's `private_decl%` elaborator, or with the `field := private proof` structure-instance syntax where the proof fills a structure field. Both elaborate the proof in a private context and hide it behind an auxiliary declaration, which is harmless by proof irrelevance. No declaration changes visibility and no statement changes, except that in `Combinatorics/SetFamily/AhlswedeZhang` the `Finset → Set` coercion in `lowerClosure s` is now written explicitly, since `private_decl%` elaborates eagerly and otherwise sees the coercion's pending metavariable.
This follows the plan of #42755 by @thorimur and takes its non-elaborator changes verbatim: moving `variable` commands out of `public section` in four files where almost every declaration is private (Galois/Decomposition, ChevalleyComplexity, GromovHausdorffRealized, NumberField/House; see https://github.com/leanprover/lean4/issues/14708 and https://github.com/leanprover/lean4/issues/14718), making the two lemmas used by the `sz_positivity` macro public under internal names, and separating data from proof in `binomExpansion` and `archimedeanClassOrderIso`. The difference is that this PR uses the elaborator that already exists in core rather than the `private` term elaborator proposed in #42563, so that it can land now. Once #42563 is in, every `private_decl% (…)` here can be replaced mechanically by `private …`. The 13 files that only need the field syntax are in #44023 and are not touched here.
🤖 Prepared with Claude Code |
tech debt |
135/274 |
Mathlib/Algebra/Group/End.lean,Mathlib/Algebra/Lie/BaseChange.lean,Mathlib/Algebra/Lie/Weights/RootSystem.lean,Mathlib/Algebra/Module/Injective.lean,Mathlib/Algebra/Polynomial/Identities.lean,Mathlib/AlgebraicTopology/FundamentalGroupoid/InducedMaps.lean,Mathlib/AlgebraicTopology/SimplicialSet/HomotopyCat.lean,Mathlib/Analysis/InnerProductSpace/TensorProduct.lean,Mathlib/Analysis/Normed/Lp/PiLp.lean,Mathlib/Analysis/Normed/Lp/ProdLp.lean,Mathlib/Analysis/Normed/Operator/Basic.lean,Mathlib/CategoryTheory/Galois/Decomposition.lean,Mathlib/CategoryTheory/Monoidal/Closed/FunctorCategory/Complete.lean,Mathlib/CategoryTheory/Preadditive/CommGrp_.lean,Mathlib/Combinatorics/SetFamily/AhlswedeZhang.lean,Mathlib/Combinatorics/SimpleGraph/Copy.lean,Mathlib/Combinatorics/SimpleGraph/Regularity/Bound.lean,Mathlib/Computability/Primrec/List.lean,Mathlib/Data/Finset/Union.lean,Mathlib/FieldTheory/PerfectClosure.lean,Mathlib/GroupTheory/DivisibleHull.lean,Mathlib/LinearAlgebra/LinearPMap.lean,Mathlib/LinearAlgebra/RootSystem/Basic.lean,Mathlib/ModelTheory/Algebra/Ring/FreeCommRing.lean,Mathlib/NumberTheory/NumberField/House.lean,Mathlib/Order/BooleanAlgebra/Basic.lean,Mathlib/Order/Lattice/Congruence.lean,Mathlib/RingTheory/Coalgebra/TensorProduct.lean,Mathlib/RingTheory/DividedPowers/Padic.lean,Mathlib/RingTheory/DividedPowers/SubDPIdeal.lean,Mathlib/RingTheory/PicardGroup.lean,Mathlib/RingTheory/Spectrum/Prime/ChevalleyComplexity.lean,Mathlib/Topology/ExtremallyDisconnected.lean,Mathlib/Topology/MetricSpace/GromovHausdorffRealized.lean,Mathlib/Topology/MetricSpace/Pseudo/Defs.lean,Mathlib/Topology/UnitInterval.lean |
36 |
5 |
['JovanGerb', 'github-actions', 'kim-em', 'mathlib-merge-conflicts', 'thorimur'] |
nobody |
8-71180 8 days ago |
12-72871 12 days ago |
17-34613 17 days |
0 |
| 43818 |
JovanGerb author:JovanGerb |
chore: clean up some `to_dual` debt |
This PR cleans up a bunch of uses of `to_dual existing`.
---
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|
tech debt |
49/186 |
Mathlib/CategoryTheory/Iso.lean,Mathlib/CategoryTheory/Limits/HasLimits.lean,Mathlib/CategoryTheory/Limits/IsLimit.lean,Mathlib/Order/ConditionallyCompletePartialOrder/Basic.lean,Mathlib/Order/Defs/Lattice.lean,Mathlib/Order/GaloisConnection/Basic.lean,Mathlib/Order/Hom/Basic.lean,Mathlib/Order/Interval/Set/Disjoint.lean,Mathlib/Order/OrdContinuous.lean,Mathlib/Order/RelClasses.lean,Mathlib/Order/SuccPred/Archimedean.lean,Mathlib/Order/UpperLower/Basic.lean,Mathlib/Order/WithBot.lean,Mathlib/Topology/Order/Basic.lean,Mathlib/Topology/Order/Bornology.lean,Mathlib/Topology/Order/OrderClosed.lean |
16 |
3 |
['JovanGerb', 'github-actions', 'mathlib-dependent-issues'] |
nobody |
5-72356 5 days ago |
6-3840 6 days ago |
6-3856 6 days |
0 |
| 44554 |
JovanGerb author:JovanGerb |
chore: adaptations for stronger `simpNF` - part 1 |
In some cases the `simpNF` linter does not warn when it should warn. Fixing this in `simpNF` surfaces many violations. This PR fixes many of those violations.
- `MvPolynomial.coeff_sub`, `MvPolynomial.coeff_neg` and `MvPolynomial.coeff_smul` have been deprecated, analogously to how `MvPolynomial.coeff_add` was deprecated in #41427. To make adaptations smoother, I added a lemma `AddMonoidAlgebra.coeff_sub_apply`.
---
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|
tech debt |
100/128 |
Mathlib/Algebra/Category/FGModuleCat/Basic.lean,Mathlib/Algebra/Category/ModuleCat/Basic.lean,Mathlib/Algebra/Category/ModuleCat/Semi.lean,Mathlib/Algebra/DirectSum/Basic.lean,Mathlib/Algebra/Group/Action/Equidecomp.lean,Mathlib/Algebra/Group/Action/Units.lean,Mathlib/Algebra/Lie/Cochain.lean,Mathlib/Algebra/Lie/Extension.lean,Mathlib/Algebra/MonoidAlgebra/Defs.lean,Mathlib/Algebra/MvPolynomial/Basic.lean,Mathlib/Algebra/MvPolynomial/CommRing.lean,Mathlib/Algebra/Polynomial/AlgebraMap.lean,Mathlib/Algebra/Ring/Subring/Defs.lean,Mathlib/Analysis/Normed/Lp/ProdLp.lean,Mathlib/Analysis/Real/Hyperreal.lean,Mathlib/CategoryTheory/Category/Cat.lean,Mathlib/CategoryTheory/Category/Preorder.lean,Mathlib/CategoryTheory/Monoidal/Cartesian/FunctorCategory.lean,Mathlib/CategoryTheory/Monoidal/End.lean,Mathlib/Data/Set/Basic.lean,Mathlib/FieldTheory/IntermediateField/Basic.lean,Mathlib/Order/Filter/FilterProduct.lean,Mathlib/Order/Hom/Basic.lean,Mathlib/Probability/Kernel/Basic.lean,Mathlib/Probability/Kernel/Integral.lean,Mathlib/RepresentationTheory/Coinvariants.lean,Mathlib/RingTheory/MvPolynomial/Groebner.lean,Mathlib/RingTheory/MvPolynomial/IrreducibleQuadratic.lean,Mathlib/RingTheory/MvPolynomial/MonomialOrder.lean,Mathlib/RingTheory/MvPowerSeries/Equiv.lean,Mathlib/RingTheory/Spectrum/Prime/ChevalleyComplexity.lean,Mathlib/SetTheory/Ordinal/Notation.lean,Mathlib/Topology/Algebra/Valued/WithVal.lean,Mathlib/Topology/ContinuousMap/ContinuousMapZero.lean,Mathlib/Topology/FiberBundle/Constructions.lean,Mathlib/Topology/LocallyFinsupp.lean,Mathlib/Topology/MetricSpace/Snowflaking.lean |
37 |
13 |
['JovanGerb', 'github-actions', 'leanprover-radar', 'vihdzp'] |
nobody |
3-35504 3 days ago |
3-80405 3 days ago |
4-1292 4 days |
0 |
| 44141 |
JX-Mo author:JX-Mo |
chore(RepresentationTheory): remove DecidableEq condition |
We remove 15 `DecidableEq`s by openning `Classical` only occasionally in `Equiv.lean`, so that all downstream proofs do not need to carry this condition.
Note that they are already `noncomputable` even with `DecidableEq` anyway: `finsuppTensorLeft/Right` needs `TensorProduct.finsuppLeft/Right` which is `noncomputable` |
t-algebra
tech debt
label:t-algebra$ |
18/21 |
Mathlib/RepresentationTheory/Coinvariants.lean,Mathlib/RepresentationTheory/Equiv.lean,Mathlib/RepresentationTheory/Homological/GroupHomology/Basic.lean,Mathlib/RepresentationTheory/Homological/GroupHomology/FiniteCyclic.lean,Mathlib/RepresentationTheory/Homological/GroupHomology/Shapiro.lean |
5 |
8 |
['JX-Mo', 'Whysoserioushah', 'github-actions', 'leanprover-radar', 'mathlib-merge-conflicts'] |
nobody |
3-32348 3 days ago |
11-10818 11 days ago |
17-11664 17 days |
1 |
| 44427 |
xroblot author:xroblot |
feat(Tactic/NormNum): norm_num extension for Squarefree |
Add a `norm_num` extension deciding `Squarefree n` for numerals `n` in `ℕ` and `ℤ`.
If `n` is not squarefree, the proof uses a witness `a > 1` with `a * a ∣ n`, found with `Nat.minSqFac`. If `n` is squarefree, the proof is a trial division of `n` by the odd numbers `k = 3, 5, 7, …`, keeping the invariant that every prime divisor of the cofactor is at least `k`.
This is adapted from the Mathlib 3 extension by Mario Carneiro (mathlib#11666), which was left commented out in `Mathlib.Data.Nat.Squarefree` during the port. This commented-out code is removed, and the corresponding tests are restored.
As for the `Nat.Prime` extension, the proof is a certificate rather than a kernel evaluation of `Nat.minSqFac` via `Nat.squarefree_iff_minSqFac`. The certificate is also faster to check, but, as for `Nat.Prime`, large numbers need a higher `maxRecDepth`.
**Note**. I have read and checked the ordinary Lean statements and their proofs, but I am not familiar with metaprogramming, so I cannot really vouch for the meta code itself, which was written with the help of an LLM. A review by someone who is comfortable with `norm_num` extensions would be very welcome.
Created with Claude Code 🤖
---
|
tech debt
t-meta
LLM-generated
|
198/205 |
Mathlib.lean,Mathlib/Data/Nat/Squarefree.lean,Mathlib/Tactic.lean,Mathlib/Tactic/NormNum/Squarefree.lean,MathlibTest/Tactic/NormNum/Ext.lean |
5 |
1 |
['github-actions'] |
nobody |
3-27184 3 days ago |
3-27184 3 days ago |
8-4081 8 days |
0 |
| 43977 |
joelriou author:joelriou |
feat(CategoryTheory/Limits): commutation of limits and colimits |
This PR adds some API about the commutation of limits and colimits. For example, if `C` has colimits of shape `K'` and limits of shape `K`, we show that the limit functor `lim : (K ⥤ C) ⥤ C` commutes with colimits of shape `K'` iff the colimit functor `colim : (K' ⥤ C) ⥤ C` commutes with limits of shape `K`.
We use this in order to prove that if `C` has exact colimits of shape `K'` then the full subcategory of `J ⥤ C` consisting of functors which commute with colimits of shape `K'` is closed under finite limits and finite colimits.
---
I do not think it would make sense to split the file `Mathlib/CategoryTheory/ObjectProperty/FunctorCategory/PreservesLimits.lean` to reduce imports.
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|
t-category-theory
tech debt
large-import
|
191/3 |
Mathlib/CategoryTheory/Limits/ColimitLimit.lean,Mathlib/CategoryTheory/ObjectProperty/ColimitsOfShape.lean,Mathlib/CategoryTheory/ObjectProperty/FunctorCategory/PreservesLimits.lean,Mathlib/CategoryTheory/ObjectProperty/LimitsOfShape.lean |
4 |
1 |
['github-actions'] |
nobody |
3-4514 3 days ago |
21-5901 21 days ago |
21-5874 21 days |
4 |
| 44040 |
kim-em author:kim-em |
chore: adaptation notes for the backward.privateInPublic uses blocked on lean4#14708 |
This PR adds an `#adaptation_note` at each `variable` declaration with an autoParam binder whose users need `backward.privateInPublic`. These uses (about 80 of the remaining option lines, in 14 files) are not removable on the Mathlib side: the autoParam helper declaration generated for a `variable` is always private, and any declaration using that variable in a public section silently elaborates to `sorry` without the option. This is https://github.com/leanprover/lean4/issues/14708. The note says which `set_option`s can go once that is fixed, and stops anyone from spending time on them before then. Each affected file was checked by removing its `true`-only option lines and observing the `sorry` warnings and the follow-on `autoParam … is not a constant` errors.
It also deletes the one option line in `CategoryTheory/SmallObject/Iteration/ExtendToSucc` that turned out to be unnecessary.
🤖 Prepared with Claude Code |
tech debt
LLM-generated
|
116/0 |
Mathlib/Algebra/Module/ZLattice/Covolume.lean,Mathlib/AlgebraicTopology/SimplicialSet/CompStruct.lean,Mathlib/AlgebraicTopology/SimplicialSet/StrictSegal.lean,Mathlib/Analysis/CStarAlgebra/ContinuousFunctionalCalculus/NonUnital.lean,Mathlib/Analysis/CStarAlgebra/ContinuousFunctionalCalculus/Unital.lean,Mathlib/Analysis/Distribution/TemperedDistribution.lean,Mathlib/CategoryTheory/ComposableArrows/Basic.lean,Mathlib/CategoryTheory/Join/Basic.lean,Mathlib/CategoryTheory/Limits/Shapes/Reflexive.lean,Mathlib/CategoryTheory/LocallyCartesianClosed/ChosenPullbacksAlong.lean,Mathlib/CategoryTheory/Monoidal/Braided/Basic.lean,Mathlib/CategoryTheory/Monoidal/CommGrp_.lean,Mathlib/CategoryTheory/Monoidal/Functor.lean,Mathlib/CategoryTheory/Sites/Point/Basic.lean,Mathlib/CategoryTheory/SmallObject/Iteration/ExtendToSucc.lean |
15 |
1 |
['github-actions'] |
nobody |
2-85864 2 days ago |
18-77684 18 days ago |
18-78839 18 days |
0 |
| 43948 |
JX-Mo author:JX-Mo |
chore(RepresentationTheory/Coinduced): tech debt |
Remove five `backward.isDefEq.respectTransparency.types` and add a CoeFun instance for `coindV` to justify the existing `coe`-named lemmas.
https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/.60CoeFun.60.20or.20.60.2Eval.60/with/630026437 |
t-algebra
tech debt
easy
label:t-algebra$ |
22/17 |
Mathlib/RepresentationTheory/Coinduced.lean |
1 |
37 |
['JX-Mo', 'Whysoserioushah', 'github-actions', 'jcommelin', 'jjdishere', 'leanprover-radar', 'mathlib-bors'] |
nobody |
2-65006 2 days ago |
5-44765 5 days ago |
8-23926 8 days |
4 |
| 41981 |
YaelDillies author:YaelDillies |
refactor(Algebra/Polynomial): make into an `abbrev` of `AddMonoidAlgebra` |
... and deprecate the declarations that are now tautological (`toFinsupp`/`ofFinsupp`, `coeff` and their API). For some of the `Polynomial` declarations that needed changing, it was simplest to replace them with the corresponding `AddMonoidAlgebra` one. Note that this replacement is far from exhaustive (a majority of the `Polynomial` API could be replaced this way).
Note that `algebraMap R R[X]` has changed defeq.
[Zulip](https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/Reworking.20Finsupp.2C.20MonoidAlgebra.2C.20HahnSeries.2E.20PowerSeries/with/609275708)
Generated through several rounds of manual review with Claude Opus. Heavily edited by hand afterwards.
Assisted-by: Claude Opus 4.8
---
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|
tech debt
t-algebra
LLM-generated
label:t-algebra$ |
546/767 |
Counterexamples/Cyclotomic105.lean,Counterexamples/MapFloor.lean,Counterexamples/MonicNonRegular.lean,Mathlib/Algebra/CubicDiscriminant.lean,Mathlib/Algebra/Lie/Rank.lean,Mathlib/Algebra/Module/LinearMap/Polynomial.lean,Mathlib/Algebra/MonoidAlgebra/MapDomain.lean,Mathlib/Algebra/MonoidAlgebra/Support.lean,Mathlib/Algebra/MvPolynomial/Equiv.lean,Mathlib/Algebra/Polynomial/AlgebraMap.lean,Mathlib/Algebra/Polynomial/Basic.lean,Mathlib/Algebra/Polynomial/Basis.lean,Mathlib/Algebra/Polynomial/BigOperators.lean,Mathlib/Algebra/Polynomial/Cardinal.lean,Mathlib/Algebra/Polynomial/Coeff.lean,Mathlib/Algebra/Polynomial/CoeffMem.lean,Mathlib/Algebra/Polynomial/Degree/Defs.lean,Mathlib/Algebra/Polynomial/Degree/Domain.lean,Mathlib/Algebra/Polynomial/Degree/IsMonicOfDegree.lean,Mathlib/Algebra/Polynomial/Degree/Lemmas.lean,Mathlib/Algebra/Polynomial/Degree/Operations.lean,Mathlib/Algebra/Polynomial/Degree/Support.lean,Mathlib/Algebra/Polynomial/Degree/TrailingDegree.lean,Mathlib/Algebra/Polynomial/Degree/Units.lean,Mathlib/Algebra/Polynomial/Derivative.lean,Mathlib/Algebra/Polynomial/Div.lean,Mathlib/Algebra/Polynomial/EraseLead.lean,Mathlib/Algebra/Polynomial/Eval/Algebra.lean,Mathlib/Algebra/Polynomial/Eval/Coeff.lean,Mathlib/Algebra/Polynomial/Eval/Defs.lean,Mathlib/Algebra/Polynomial/Eval/Degree.lean,Mathlib/Algebra/Polynomial/FieldDivision.lean,Mathlib/Algebra/Polynomial/GroupRingAction.lean,Mathlib/Algebra/Polynomial/HasseDeriv.lean,Mathlib/Algebra/Polynomial/Homogenize.lean,Mathlib/Algebra/Polynomial/Inductions.lean,Mathlib/Algebra/Polynomial/Laurent.lean,Mathlib/Algebra/Polynomial/Lifts.lean,Mathlib/Algebra/Polynomial/Module/Basic.lean,Mathlib/Algebra/Polynomial/Monic.lean,Mathlib/Algebra/Polynomial/Monomial.lean,Mathlib/Algebra/Polynomial/OfFn.lean,Mathlib/Algebra/Polynomial/Reverse.lean,Mathlib/Algebra/Polynomial/Roots.lean,Mathlib/Algebra/Polynomial/RuleOfSigns.lean,Mathlib/Algebra/Polynomial/Sequence.lean,Mathlib/Algebra/Polynomial/Splits.lean,Mathlib/Algebra/Polynomial/UnitTrinomial.lean,Mathlib/Algebra/Ring/Subring/IntPolynomial.lean,Mathlib/AlgebraicGeometry/EllipticCurve/DivisionPolynomial/Degree.lean,Mathlib/Analysis/Polynomial/CauchyBound.lean,Mathlib/Analysis/Polynomial/Fourier.lean,Mathlib/FieldTheory/Finite/Basic.lean,Mathlib/FieldTheory/Minpoly/Field.lean,Mathlib/FieldTheory/Minpoly/MinpolyDiv.lean,Mathlib/FieldTheory/SeparablyGenerated.lean,Mathlib/LinearAlgebra/Finsupp/VectorSpace.lean,Mathlib/LinearAlgebra/Lagrange.lean,Mathlib/LinearAlgebra/Matrix/Charpoly/Coeff.lean,Mathlib/LinearAlgebra/Matrix/Charpoly/Univ.lean,Mathlib/LinearAlgebra/Matrix/GeneralLinearGroup/FinTwo.lean,Mathlib/LinearAlgebra/Matrix/Polynomial.lean,Mathlib/NumberTheory/BernoulliPolynomials.lean,Mathlib/RingTheory/AdjoinRoot.lean,Mathlib/RingTheory/Algebraic/Basic.lean,Mathlib/RingTheory/Algebraic/Integral.lean,Mathlib/RingTheory/Artinian/Instances.lean,Mathlib/RingTheory/Derivation/MapCoeffs.lean,Mathlib/RingTheory/IntegralClosure/IsIntegralClosure/Basic.lean,Mathlib/RingTheory/Invariant/Basic.lean,Mathlib/RingTheory/IsAdjoinRoot.lean,Mathlib/RingTheory/Jacobson/Polynomial.lean,Mathlib/RingTheory/KrullDimension/Polynomial.lean,Mathlib/RingTheory/MatrixPolynomialAlgebra.lean,Mathlib/RingTheory/MvPolynomial/Homogeneous.lean,Mathlib/RingTheory/Norm/Basic.lean,Mathlib/RingTheory/Polynomial/Basic.lean,Mathlib/RingTheory/Polynomial/Cyclotomic/Basic.lean,Mathlib/RingTheory/Polynomial/Hermite/Basic.lean,Mathlib/RingTheory/Polynomial/HilbertPoly.lean,Mathlib/RingTheory/Polynomial/Ideal.lean,Mathlib/RingTheory/Polynomial/IntegralNormalization.lean,Mathlib/RingTheory/Polynomial/IrreducibleRing.lean,Mathlib/RingTheory/Polynomial/Nilpotent.lean,Mathlib/RingTheory/Polynomial/Opposites.lean,Mathlib/RingTheory/Polynomial/ScaleRoots.lean,Mathlib/RingTheory/Polynomial/Subring.lean,Mathlib/RingTheory/PolynomialAlgebra.lean,Mathlib/RingTheory/PowerBasis.lean,Mathlib/RingTheory/PowerSeries/Basic.lean,Mathlib/RingTheory/PowerSeries/Derivative.lean,Mathlib/RingTheory/PowerSeries/Trunc.lean,Mathlib/RingTheory/ReesAlgebra.lean,Mathlib/RingTheory/Spectrum/Prime/ChevalleyComplexity.lean,Mathlib/RingTheory/Spectrum/Prime/IsOpenComapC.lean,Mathlib/RingTheory/Spectrum/Prime/Topology.lean,Mathlib/RingTheory/Trace/Basic.lean,Mathlib/RingTheory/ZariskisMainTheorem.lean,Mathlib/Tactic/ComputeDegree.lean,Mathlib/Tactic/ReduceModChar.lean |
102 |
18 |
['NoahW314', 'YaelDillies', 'github-actions', 'leanprover-radar', 'mathlib-merge-conflicts', 'tb65536'] |
nobody |
2-41550 2 days ago |
2-43220 2 days ago |
66-48699 66 days |
0 |
| 36239 |
plp127 author:plp127 |
feat(FieldTheory/KrullTopology): define uniform group structure on galois group |
Endow the galois group of a field extension `Gal(L/K)` with the structure of a uniform group. Use this to prove some properties of the galois group earlier, for example, that the galois group is compact is immediate, and in more generality than the version proved in `FieldTheory/Galois/Profinite`. Deprecate some material which used to be used to define the krull topology, but is now unused since the krull topology comes out of the uniform structure.
---
- [x] depends on: #39759
- [x] depends on: #42152
- [x] depends on: #42154
- [x] depends on: #42141
- [x] depends on: #42117
- [x] depends on: #42163
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|
t-algebra
tech debt
increases-technical-debt
label:t-algebra$ |
440/224 |
Mathlib/FieldTheory/AbsoluteGaloisGroup.lean,Mathlib/FieldTheory/Galois/Infinite.lean,Mathlib/FieldTheory/Galois/Profinite.lean,Mathlib/FieldTheory/KrullTopology.lean,Mathlib/NumberTheory/Cyclotomic/CyclotomicCharacter.lean |
5 |
31 |
['acmepjz', 'dagurtomas', 'github-actions', 'mathlib-bors', 'mathlib-dependent-issues', 'mathlib-merge-conflicts', 'plp127', 'vihdzp'] |
mattrobball assignee:mattrobball |
2-13988 2 days ago |
2-36697 2 days ago |
70-6911 70 days |
0 |
| 43418 |
aimmerwahr author:aimmerwahr |
feat(RingTheory): prove `comap_ringConGen_equiv` (`proof_wanted`) |
Prove that `(ringConGen r).comap f = ringConGen (r on f)` for an EquivLike as stated in proof_wanted.
I rearranged the parameter order (and dropped `[FunLike F R' R]`) from the original proof_wanted statement, since EquivLike already gives a FunLike and having repeated FunLike (that are not definitionally equal) makes instance resolution impossible.
This is essentially the same proof as the previous ring equivalence version (pulling back the RingCon by f inverse and then by f), with comap spelled out explicitly.
AI usage: Everything is proved by hand. I then worked with AI to review and simplify the code.
Thanks to @pepamontero for suggesting a better formulation! |
file-removed
t-ring-theory
new-contributor
easy
tech debt
|
18/36 |
Mathlib/LinearAlgebra/FreeProduct/Basic.lean,Mathlib/RingTheory/Congruence/Basic.lean,Wanted.lean,Wanted/RingTheory/Congruence/Basic.lean |
4 |
22 |
['aimmerwahr', 'eric-wieser', 'github-actions', 'ocfnash', 'pepamontero'] |
nobody |
1-69400 1 day ago |
1-71083 1 day ago |
35-21821 35 days |
0 |
| 37907 |
grunweg author:grunweg |
feat(by_contra,contrapose): warn if the push_neg step does nothing |
---
- [x] depends on: #31597
- [x] depends on: #37899
- [x] depends on: #37937
- [x] depends on: #37999
- [x] depends on: #38008
- [x] depends on: #43999
- [x] depends on: #44084
<!-- Your PR title will become the first line of the commit message.
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|
t-meta
tech debt
maintainer-merge
|
64/15 |
Mathlib/Data/Set/Card.lean,Mathlib/FieldTheory/IntermediateField/Adjoin/Basic.lean,Mathlib/MeasureTheory/Function/LpSeminorm/SMul.lean,Mathlib/Tactic/ByCases.lean,Mathlib/Tactic/ByContra.lean,Mathlib/Tactic/Contrapose.lean,Mathlib/Tactic/Order.lean,MathlibTest/Tactic/ByContra.lean,MathlibTest/Tactic/Contrapose.lean,MathlibTest/Tactic/Order.lean |
10 |
15 |
['JovanGerb', 'SnirBroshi', 'github-actions', 'grunweg', 'joneugster', 'mathlib-dependent-issues', 'mathlib-merge-conflicts'] |
joneugster assignee:joneugster |
1-48278 1 day ago |
3-43330 3 days ago |
17-12172 17 days |
0 |
| 44361 |
JovanGerb author:JovanGerb |
chore(Algebra/Homology/ShortComplex): remove many backward options |
This PR removes almost all uses of `backward.isDefEq.respectTransparency` from `Algebra/Homology/ShortComplex` by marking definitions `@[implicit_reducible]` appropriately.
---
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|
tech debt |
115/309 |
Mathlib/Algebra/Homology/ShortComplex/Ab.lean,Mathlib/Algebra/Homology/ShortComplex/Basic.lean,Mathlib/Algebra/Homology/ShortComplex/Exact.lean,Mathlib/Algebra/Homology/ShortComplex/HomologicalComplex.lean,Mathlib/Algebra/Homology/ShortComplex/Homology.lean,Mathlib/Algebra/Homology/ShortComplex/LeftHomology.lean,Mathlib/Algebra/Homology/ShortComplex/Limits.lean,Mathlib/Algebra/Homology/ShortComplex/Preadditive.lean,Mathlib/Algebra/Homology/ShortComplex/PreservesHomology.lean,Mathlib/Algebra/Homology/ShortComplex/RightHomology.lean,Mathlib/Algebra/Homology/ShortComplex/SnakeLemma.lean,Mathlib/CategoryTheory/Abelian/Refinements.lean,Mathlib/CategoryTheory/Limits/Cones.lean,Mathlib/CategoryTheory/Limits/IsLimit.lean,Mathlib/CategoryTheory/Limits/Shapes/Kernels.lean |
15 |
7 |
['JovanGerb', 'github-actions', 'joelriou', 'leanprover-radar', 'robin-carlier'] |
nobody |
1-34523 1 day ago |
10-30514 10 days ago |
10-30484 10 days |
0 |
| 43079 |
Parcly-Taxel author:Parcly-Taxel |
chore: rename underscore defs in `JacobiTheta.Bounds` |
In the `HurwitzKernelBounds` namespace:
* `f_nat, g_nat, F_nat -> f, g, F`
* `f_int, F_int -> fZ, FZ` |
t-number-theory
tech debt
|
111/93 |
Mathlib/NumberTheory/LSeries/HurwitzZetaEven.lean,Mathlib/NumberTheory/LSeries/HurwitzZetaOdd.lean,Mathlib/NumberTheory/ModularForms/JacobiTheta/Bounds.lean |
3 |
4 |
['Parcly-Taxel', 'github-actions', 'jcommelin', 'mathlib-merge-conflicts'] |
nobody |
1-32653 1 day ago |
1-33684 1 day ago |
47-60896 47 days |
0 |
| 43224 |
joelriou author:joelriou |
feat(Category/Abelian/Injective): interaction between `InjectiveResolution.extMk` and the connecting morphism |
Given a short exact sequence `0 → X₁ → X₂ → X₃ → 0` and an injective resolution `R` of an object `Y`, we give a concrete computation of the connecting homomorphism $$Ext^n(X_1, Y) \to Ext^{n + 1}(X_3, Y)$$.
---
- [x] depends on: #43492
- [x] depends on: #43086
- [x] depends on: #43089
- [x] depends on: #43103
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|
tech debt
t-category-theory
|
199/30 |
Mathlib/Algebra/Homology/DerivedCategory/Ext/Map.lean,Mathlib/Algebra/Homology/DerivedCategory/SingleTriangle.lean,Mathlib/Algebra/Homology/DerivedCategory/SmallShiftedHom.lean,Mathlib/Algebra/Homology/HomotopyCategory/HomComplex.lean,Mathlib/Algebra/Homology/HomotopyCategory/HomComplexShift.lean,Mathlib/Algebra/Homology/HomotopyCategory/HomComplexSingle.lean,Mathlib/Algebra/Homology/HomotopyCategory/Pretriangulated.lean,Mathlib/Algebra/Homology/ShortComplex/Basic.lean,Mathlib/CategoryTheory/Abelian/Injective/Ext.lean,Mathlib/CategoryTheory/Shift/Basic.lean,Mathlib/CategoryTheory/Shift/ShiftedHom.lean |
11 |
11 |
['Multramate', 'github-actions', 'joelriou', 'mathlib-dependent-issues', 'mathlib-merge-conflicts', 'robin-carlier'] |
nobody |
1-16191 1 day ago |
1-17110 1 day ago |
32-81194 32 days |
2 |
| 42138 |
mitchell-horner author:mitchell-horner |
feat(Combinatorics/SimpleGraph): copies into `⊤` and containment in the complete graph |
Add copy constructors mirroring the existing `Copy.bot` API.
---
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|
t-combinatorics
tech debt
|
116/31 |
Mathlib/Combinatorics/SimpleGraph/Copy.lean,Mathlib/Combinatorics/SimpleGraph/Maps.lean,Mathlib/Combinatorics/SimpleGraph/Walk/Maps.lean |
3 |
29 |
['Ruben-VandeVelde', 'SnirBroshi', 'github-actions', 'mathlib-dependent-issues', 'mathlib-merge-conflicts', 'mitchell-horner', 'vlad902'] |
SnirBroshi assignee:SnirBroshi |
1-12988 1 day ago |
14-67069 14 days ago |
56-29594 56 days |
0 |
| 44666 |
smmercuri author:smmercuri |
chore: split `RingTheory/DedekindDomain/AdicValuation.lean` into `AdicValuation/Valuation.lean` and `AdicValuation/Completion.lean` |
- The file has grown quite large so split the `HeightOneSpectrum.valuation` material away from the completion material
- Provides a more natural home for `NumberTheory/RamificationInertia/Valuation.lean`
---
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|
tech debt |
1317/1269 |
Mathlib.lean,Mathlib/FieldTheory/RatFunc/AsPolynomial.lean,Mathlib/NumberTheory/NumberField/Completion/FinitePlace.lean,Mathlib/NumberTheory/Padics/HeightOneSpectrum.lean,Mathlib/NumberTheory/RamificationInertia/Valuation.lean,Mathlib/RingTheory/DedekindDomain/AdicValuation.lean,Mathlib/RingTheory/DedekindDomain/AdicValuation/Completion.lean,Mathlib/RingTheory/DedekindDomain/AdicValuation/Ramification.lean,Mathlib/RingTheory/DedekindDomain/AdicValuation/Valuation.lean,Mathlib/RingTheory/DedekindDomain/FiniteAdeleRing.lean,Mathlib/RingTheory/DedekindDomain/GaussLemma.lean,Mathlib/RingTheory/DedekindDomain/SInteger.lean,Mathlib/RingTheory/DedekindDomain/SelmerGroup.lean,Mathlib/RingTheory/Valuation/Discrete/IsDiscreteValuationRing.lean |
14 |
1 |
['github-actions'] |
nobody |
1-12968 1 day ago |
1-42547 1 day ago |
1-42517 1 day |
3 |
| 35548 |
gasparattila author:gasparattila |
fix(Tactic/FunProp): do not unfold semireducible definitions in the presence of projections |
Currently, `fun_prop` incorrectly unfolds semireducible definitions when a projection or recursor is applied. This PR fixes this by switching to `whnfR` together with `Lean.Meta.withCanUnfoldPred` for the custom unfolding logic.
Unfortunately, there are many proofs which rely on this bug. To avoid breaking proofs, the option `fun_prop.projDefaultTransparency` is added for locally restoring the previous behavior. Removing the uses of this option is left for future PRs.
---
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|
t-meta
tech debt
increases-technical-debt
|
114/53 |
Mathlib/Analysis/Matrix/Normed.lean,Mathlib/Analysis/Normed/Lp/ProdLp.lean,Mathlib/Condensed/Light/TopCatAdjunction.lean,Mathlib/Condensed/TopCatAdjunction.lean,Mathlib/Geometry/Convex/ConvexSpace/PathConnectedSpaceStdSimplex.lean,Mathlib/NumberTheory/Harmonic/ZetaAsymp.lean,Mathlib/NumberTheory/ModularForms/Bounds.lean,Mathlib/Tactic/FunProp/Core.lean,Mathlib/Tactic/FunProp/FunctionData.lean,Mathlib/Tactic/FunProp/Mor.lean,Mathlib/Tactic/FunProp/Theorems.lean,Mathlib/Tactic/FunProp/Types.lean,Mathlib/Topology/Algebra/AffineSubspace.lean,Mathlib/Topology/Algebra/ConstMulAction.lean,Mathlib/Topology/Algebra/Constructions.lean,Mathlib/Topology/Algebra/ContinuousAffineEquiv.lean,Mathlib/Topology/Algebra/Field.lean,Mathlib/Topology/Algebra/Group/ContinuousDiv.lean,Mathlib/Topology/Algebra/Group/ContinuousInv.lean,Mathlib/Topology/Algebra/Group/Matrix.lean,Mathlib/Topology/Algebra/Group/Torsor.lean,Mathlib/Topology/Algebra/Group/Units.lean,Mathlib/Topology/Algebra/Module/ContinuousLinearMap/Positive.lean,Mathlib/Topology/Algebra/Module/Equiv/Basic.lean,Mathlib/Topology/Algebra/Module/Equiv/Prod.lean,Mathlib/Topology/Algebra/Module/Equiv/Submodule.lean,Mathlib/Topology/Algebra/Module/IsWeak.lean,Mathlib/Topology/Algebra/Module/Spaces/WeakBilin.lean,Mathlib/Topology/Category/TopCat/Limits/Basic.lean,Mathlib/Topology/Constructions/SumProd.lean,Mathlib/Topology/ContinuousMap/Algebra.lean,Mathlib/Topology/Homeomorph/Lemmas.lean,Mathlib/Topology/Semicontinuity/Michael.lean,MathlibTest/FunPropMinimal.lean |
34 |
14 |
['DavidLedvinka', 'JovanGerb', 'gasparattila', 'github-actions', 'j-loreaux', 'lecopivo', 'mathlib-merge-conflicts'] |
nobody |
1-12352 1 day ago |
11-36778 11 days ago |
47-4839 47 days |
0 |
| 41555 |
BryceT233 author:BryceT233 |
feat(Algebra/Order/Antidiagonal): connect `Finset.HasAntidiagonal` with `Filter.TendstoCofinite` |
This PR connects `Finset.HasAntidiagonal` with `Filter.TendstoCofinite` and cleans up `TendstoCofinite.lean`.
---
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|
tech debt
t-algebra
label:t-algebra$ |
34/12 |
Mathlib/Algebra/Order/Antidiag/Prod.lean,Mathlib/Order/Filter/TendstoCofinite.lean |
2 |
14 |
['BryceT233', 'github-actions', 'jcommelin', 'mathlib-dependent-issues', 'mathlib-merge-conflicts', 'plp127'] |
nobody |
0-76361 21 hours ago |
0-78102 21 hours ago |
36-76378 36 days |
0 |
| 43565 |
Parcly-Taxel author:Parcly-Taxel |
refactor(Archive/FriendshipGraphs): golf everything |
Also remove the file's `set_option`s and `@[expose]`. Like #43434, no deprecations are added since this is a leaf file in Archive. |
tech debt |
103/293 |
Archive/Wiedijk100Theorems/FriendshipGraphs.lean |
1 |
8 |
['Parcly-Taxel', 'SnirBroshi', 'github-actions', 'mathlib-merge-conflicts'] |
JovanGerb assignee:JovanGerb |
0-71975 19 hours ago |
14-33435 14 days ago |
32-69159 32 days |
0 |
| 43896 |
joelriou author:joelriou |
feat(Category): external products of derivability structures |
The external product of two left/right derivability structures is again a derivability structure (when one assumes that the properties of morphisms which appear contain identities).
This observation of mine (in 2023) was my main motivation for the formalization of derivability structures, because it would allow to formalize not only derived functors in one variable (see #43267), but also derived functors in several variables (like the tensor product, see https://github.com/joelriou/mathlib4/blob/jriou_localization/Mathlib/CategoryTheory/Localization/DerivabilityStructure/Monoidal.lean).
---
- [x] depends on: #43895
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|
t-category-theory
tech debt
|
149/0 |
Mathlib.lean,Mathlib/CategoryTheory/Localization/DerivabilityStructure/Product.lean,Mathlib/CategoryTheory/Localization/Equivalence.lean,Mathlib/CategoryTheory/Localization/LocalizerMorphism.lean,Mathlib/CategoryTheory/Localization/Resolution.lean,Mathlib/CategoryTheory/Products/Basic.lean,docs/references.bib |
7 |
3 |
['github-actions', 'mathlib-dependent-issues', 'mathlib-merge-conflicts'] |
nobody |
0-20252 5 hours ago |
0-21600 5 hours ago |
0-21572 5 hours |
0 |
| 44647 |
JovanGerb author:JovanGerb |
chore(CategoryTheory/Limits/Preserves/Basic): use `to_dual` |
This PR uses `to_dual` for declarations about preserving limits and colimits.
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|
tech debt
t-category-theory
|
118/337 |
Mathlib/CategoryTheory/Functor/ReflectsIso/Basic.lean,Mathlib/CategoryTheory/Limits/Preserves/Basic.lean,Mathlib/CategoryTheory/NatTrans.lean |
3 |
2 |
['github-actions', 'joelriou'] |
nobody |
0-1400 23 minutes ago |
0-1467 23 minutes ago |
2-19511 2 days |
0 |
| 44695 |
vihdzp author:vihdzp |
doc: write docstring for `Shrink.rec` |
We copy the docstring from similar recursors.
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tech debt
easy
t-logic
documentation
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Mathlib/Logic/Small/Defs.lean,scripts/nolints.json |
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['github-actions'] |
nobody |
0-696 11 minutes ago |
0-63978 17 hours ago |
0-63948 17 hours |
0 |
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