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 |
| 35753 |
Vilin97 author:Vilin97 |
feat(Topology/Algebra/Order): regular grid helpers and piecewise linear interpolation |
Make API for piecewise linear interpolation on regular grids. I need these to for ODE time-stepping methods, like forward Euler, and later Runge–Kutta methods.
Follow-up PR: #35755 (forward Euler method convergence).
I don't know if these numerical analysis ODE-solving methods even belong in mathlib. If someone could advise me on it, I would appreciate it.
---
The initial proof was produced by [Aristotle](https://aristotle.harmonic.fun). The code was iteratively refined (factoring out lemmas, golfing, simplifying proofs) using Claude Code.
- [ ] depends on: #38091 |
t-topology
new-contributor
LLM-generated
maintainer-merge
|
201/0 |
Mathlib.lean,Mathlib/Topology/Algebra/Order/PiecewiseLinear.lean |
2 |
59 |
['Vilin97', 'YanYablonovskiy', 'adomani', 'botbaki-review', 'copilot-pull-request-reviewer', 'dagurtomas', 'eric-wieser', 'github-actions', 'grunweg', 'j-loreaux', 'mathlib-dependent-issues', 'wwylele'] |
nobody |
65-52590 2 months ago |
98-63310 98 days ago |
131-25766 131 days |
| 41984 |
fpvandoorn author:fpvandoorn |
fix: typo in simps error messages |
* Remove trailing underscores in names `simps`-errors would erroneously print
* Restore Lean 3 error message tests.
---
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|
t-meta
maintainer-merge
awaiting-author
|
46/27 |
Mathlib/Tactic/Simps/Basic.lean,MathlibTest/Simps.lean |
2 |
4 |
['Vierkantor', 'github-actions', 'grunweg'] |
nobody |
15-82144 15 days ago |
15-82144 15 days ago |
2-5055 2 days |
| 41976 |
fpvandoorn author:fpvandoorn |
refactor(simps): centralize notation_class and initialize_simps_projections |
* Create a single file that declares all `notation_class` attributes and `initialize_simps_projections` calls for many structures in Core.
* Some of these notation classes were previously declared in `Tactic.Simps.Basic` or in other Mathlib files. The latter was problematic, because then you could have files that import `simps` and a Core structure, but not generate the right simp lemmas.
* Make sure that we import this file instead of the internal `Tactic.Simps.Basic` file throughout Mathlib. Not importing this file can cause `simps` to generate wrong lemmas.
* Also call `initialize_simps_projections` for (some) classes that are declared in Mathlib. (This is not super important, but ensures that these projections have to be only generated once, instead of in every file that imports it.)
* This was prompted by observing faulty behavior in #40653.
---
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|
large-import
t-meta
maintainer-merge
|
170/36 |
Mathlib.lean,Mathlib/Algebra/Group/Defs.lean,Mathlib/Algebra/Notation/Defs.lean,Mathlib/CategoryTheory/Monoidal/Functor/Types.lean,Mathlib/Data/FunLike/Basic.lean,Mathlib/Data/Subtype.lean,Mathlib/Data/TwoPointing.lean,Mathlib/Logic/Equiv/Defs.lean,Mathlib/Order/Defs/LinearOrder.lean,Mathlib/Order/Notation.lean,Mathlib/Tactic.lean,Mathlib/Tactic/Common.lean,Mathlib/Tactic/ProdAssoc.lean,Mathlib/Tactic/ProxyType.lean,Mathlib/Tactic/Simps.lean,Mathlib/Tactic/Simps/Basic.lean,Mathlib/Tactic/Simps/NotationClass.lean,MathlibTest/Simps.lean,MathlibTest/TacticCheckInstancesSimps.lean |
19 |
3 |
['github-actions', 'joneugster'] |
nobody |
15-5818 15 days ago |
18-3100 18 days ago |
18-3148 18 days |
| 38200 |
Parcly-Taxel author:Parcly-Taxel |
feat: Turán numbers and their strict monotonicity |
`strictMonoOn_turanNumber` was initially proved by @Aristotle-Harmonic, then hand-polished.
Co-authored-by: Aristotle (Harmonic) <aristotle-harmonic@harmonic.fun> |
t-combinatorics
tech debt
maintainer-merge
|
45/20 |
Mathlib/Combinatorics/SimpleGraph/Extremal/Turan.lean |
1 |
9 |
['Parcly-Taxel', 'YaelDillies', 'github-actions', 'mathlib-merge-conflicts', 'tb65536'] |
nobody |
14-36922 14 days ago |
14-37558 14 days ago |
108-13239 108 days |
| 37685 |
vihdzp author:vihdzp |
feat: Fodor's lemma |
We define stationary sets and prove Fodor's lemma, following the proof at Wikipedia.
---
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- [x] depends on: #39727
I'm surprised that this has a [Wikipedia article](https://en.wikipedia.org/wiki/Fodor%27s_lemma) but isn't listed in 1000.yaml. Is it just because the name has "lemma" instead of "theorem"?
[](https://gitpod.io/from-referrer/)
|
t-set-theory
t-order
large-import
maintainer-merge
|
70/3 |
Mathlib/SetTheory/Cardinal/Cofinality/Club.lean,Mathlib/SetTheory/Ordinal/Basic.lean |
2 |
16 |
['YaelDillies', 'github-actions', 'mathlib-dependent-issues', 'mathlib-merge-conflicts', 'staroperator', 'vihdzp'] |
nobody |
14-36869 14 days ago |
15-34029 15 days ago |
15-68863 15 days |
| 38227 |
vihdzp author:vihdzp |
chore(Algebra/Order/Monoid/Unbundled/Basic): golfing + formatting |
We make use of `variable`, fix some weird spacing, and golf many proofs.
The only breaking change is that `mul_lt_iff_lt_one_left'`/`add_lt_iff_neg_left` now takes an explicit argument, matching the theorems surrounding it.
---
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Not too fond of the `calc` tactic.
[](https://gitpod.io/from-referrer/)
|
t-algebra
t-order
maintainer-merge
label:t-algebra$ |
233/501 |
Mathlib/Algebra/Order/Archimedean/Real/Basic.lean,Mathlib/Algebra/Order/Monoid/Unbundled/Basic.lean |
2 |
9 |
['YaelDillies', 'github-actions', 'mathlib-merge-conflicts', 'vihdzp'] |
nobody |
14-35626 14 days ago |
14-73970 14 days ago |
39-80405 39 days |
| 41965 |
bryangingechen author:bryangingechen |
ci: retire legacy zulip emoji workflows, enable emojis on mathlib4-nightly-testing |
This PR replaces our existing zulip emoji reaction workflows with new triggers in the new "reconciliation" workflow (`zulip_emoji_reconcile.yml`) added in #41852.
Deleted workflows:
- `zulip_emoji_ci_status.yaml`: handles CI status reactions. Replaced with `workflow_run` trigger.
- `zulip_emoji_closed_pr.yaml`: handles reactions for closed / reopened PRs. Replaced with `pull_request_target` `closed` and `reopened` triggers.
- `zulip_emoji_labelling.yaml`: handles reactions for awaiting-author and maintainer-merge labels. Replaced with `pull_request_target` `labeled` and `unlabeled` triggers.
- `zulip_emoji_merge_delegate.yaml`: handles reactions for PRs merged into `master`. Replaced with `pull_request_target` `closed` and `reopened` triggers.
The Zulip reaction steps have also been removed from `maintainer_bors_wf_run.yml` which now just handles labels: that label event then triggers the reconciliation workflow rather than handling the reactions on its own.
This PR also adds and wires in a configuration file for `mathlib4-nightly-testing` so that reactions for `nightly#XXX` PRs are also managed.
Prepared with Claude code.
---
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[](https://gitpod.io/from-referrer/)
|
CI
LLM-generated
file-removed
maintainer-merge
|
159/348 |
.github/workflows/maintainer_bors_wf_run.yml,.github/workflows/zulip_emoji_ci_status.yaml,.github/workflows/zulip_emoji_closed_pr.yaml,.github/workflows/zulip_emoji_labelling.yaml,.github/workflows/zulip_emoji_merge_delegate.yaml,.github/workflows/zulip_emoji_reconcile.yml,.github/zulip-emoji-config-nightly.json,docs/workflows.md |
8 |
3 |
['github-actions', 'joneugster'] |
joneugster assignee:joneugster |
14-5732 14 days ago |
18-43929 18 days ago |
18-43705 18 days |
| 40389 |
YaelDillies author:YaelDillies |
feat(MeasureTheory): the average of a sum of functions |
and other basic lemmas about `average`
From MeanFourier
---
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[](https://gitpod.io/from-referrer/)
|
t-measure-probability
maintainer-merge
|
88/24 |
Mathlib/Analysis/Convex/Integral.lean,Mathlib/MeasureTheory/Integral/Average.lean |
2 |
7 |
['EtienneC30', 'YaelDillies', 'github-actions'] |
nobody |
13-52589 13 days ago |
59-29838 59 days ago |
59-46616 59 days |
| 42205 |
grunweg author:grunweg |
chore(Geometry/Manifold): avoid some underscore soup |
---
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[](https://gitpod.io/from-referrer/)
|
t-differential-geometry
maintainer-merge
|
13/9 |
Mathlib/Geometry/Manifold/ContMDiff/Basic.lean,Mathlib/Geometry/Manifold/HasGroupoid.lean,Mathlib/Geometry/Manifold/IsManifold/Basic.lean |
3 |
16 |
['JovanGerb', 'felixpernegger', 'github-actions', 'grunweg'] |
nobody |
9-85824 9 days ago |
10-65242 10 days ago |
10-65018 10 days |
| 42202 |
j-loreaux author:j-loreaux |
feat: define `PositiveContinuousLinearMap` |
This PR defines the continuous version of `PositiveLinearMap` via `extend`ing this structure as well as `ContinuousLinearMap`. In the process, we also create `Is{Add,Zero,SMul}Apply` instances for `PositiveLinearMap`.
---
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[](https://gitpod.io/from-referrer/)
|
t-topology
maintainer-merge
|
269/16 |
Mathlib.lean,Mathlib/Algebra/Order/Module/PositiveLinearMap.lean,Mathlib/Topology/Algebra/Module/ContinuousLinearMap/Positive.lean |
3 |
28 |
['github-actions', 'j-loreaux', 'mcdoll', 'themathqueen'] |
nobody |
9-72790 9 days ago |
9-73611 9 days ago |
9-82272 9 days |
| 41923 |
themathqueen author:themathqueen |
feat(Algebra): `IsUnital` and `IsNotUnital` classes |
This adds Prop-type classes on multiplicative types that state whether a unit exists or not. This shouldn't really be used unless it is the only reasonable way to phrase or prove a statement.
---
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This will be used in #36327.
Zulip thread: [#mathlib4 > `IsUnital` class](#narrow/channel/287929-mathlib4/topic/.60IsUnital.60.20class)
[](https://gitpod.io/from-referrer/)
|
t-algebra
maintainer-merge
label:t-algebra$ |
183/0 |
Mathlib/Algebra/Algebra/Defs.lean,Mathlib/Algebra/Group/Defs.lean,Mathlib/Algebra/Ring/Defs.lean,Mathlib/Analysis/CStarAlgebra/Classes.lean,Mathlib/Analysis/Normed/Module/Basic.lean,Mathlib/Analysis/Normed/Ring/Basic.lean |
6 |
13 |
['SnirBroshi', 'github-actions', 'j-loreaux', 'themathqueen'] |
nobody |
9-47099 9 days ago |
9-77243 9 days ago |
19-54097 19 days |
| 41757 |
wwylele author:wwylele |
doc: add theorem 8 (straightedge-and-compass construction) to 100.yaml |
Adding my repo as an external proof to the theorems.
---
A hard part of these theorems is verifying the definition and the statement. I have extracted the relevant definition in the [Challenge.lean file](https://github.com/wwylele/Compass/blob/master/Challenge.lean) for review. This is also verifiable using comparator. I followed [wikipedia](https://en.wikipedia.org/wiki/Straightedge_and_compass_construction#The_basic_constructions) for the definition of constructibility
Zulip thread: [#general > The impossibility of trisecting the angle](https://leanprover.zulipchat.com/#narrow/channel/113488-general/topic/The.20impossibility.20of.20trisecting.20the.20angle/with/610005158) (there is discussion about whether this definition allows "picking an arbitrary point")
I plan to upstream some or all of the project, but I anticipate it to be a long process, and it is not clear to me whether the entire project is within the scope of Mathlib, which is why I am only adding a link to the repo for now
AI usage disclosure: [this 63 lines](https://github.com/wwylele/Compass/blob/1352a83753052bc9a069b52aced81785dccb0aba/Compass/ConstructibleNumber.lean#L45-L111) were generated by Aristotle. The rest were written by me.
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|
documentation
maintainer-merge
|
3/0 |
docs/100.yaml |
1 |
4 |
['github-actions', 'joneugster'] |
joneugster assignee:joneugster |
8-25199 8 days ago |
24-66991 24 days ago |
24-66767 24 days |
| 41487 |
Deicyde author:Deicyde |
feat: implement pi-base cross-reference attribute |
Adds a `@[pibase ID]` cross-reference attribute for canonical pi-base identifiers.
The parser accepts IDs of the form `P000001`, `S000023`, and `T000001`, and routes them to the corresponding `properties/`, `spaces/`, or `theorems/` page on `topology.pi-base.org`.
Tests cover docstring insertion, `#pibase_tags`, all three URL routes, and malformed IDs.
This PR was prepared with assistance from Codex. Based heavily on #41290 |
t-meta
LLM-generated
maintainer-merge
awaiting-author
|
149/8 |
Mathlib/Tactic/CrossRefAttribute.lean,MathlibTest/CrossRefAttribute.lean |
2 |
28 |
['Deicyde', 'adomani', 'github-actions', 'joneugster', 'mathlib-merge-conflicts', 'thorimur', 'vlad902'] |
adomani and thorimur assignee:adomani assignee:thorimur |
8-24652 8 days ago |
12-9538 12 days ago |
12-6734 12 days |
| 41938 |
rosborn author:rosborn |
chore(Linter/DirectoryDependency): move forbidden directories into a JSON file |
Co-authored-by: Michael Rothgang <rothgang@math.uni-bonn.de>
---
This PR adopts the work from #26088 and #26406.
The JSON file was generated programmatically from the previous hard-coded array and verified to produce an identical relation, with one deliberate exception: the entry ``(`MathlibTest.Header, `Mathlib.Deprecated)`` was dropped.
If this looks good, I can continue work on `allowedImportDirs` and `overrideAllowedImportDirs`.
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|
t-linter
maintainer-merge
|
407/313 |
Mathlib/Tactic/Linter/DirectoryDependency.lean,scripts/README.md,scripts/forbiddenDirs.json |
3 |
14 |
['github-actions', 'grunweg', 'joneugster', 'rosborn'] |
grunweg and joneugster assignee:joneugster assignee:grunweg |
8-23852 8 days ago |
10-49645 10 days ago |
14-71042 14 days |
| 39696 |
jsm28 author:jsm28 |
refactor(LinearAlgebra/Orientation,LinearAlgebra/AffineSpace/FiniteDimensional): instances for arbitrary orientations |
Based on suggestions by @kim-em on Zulip https://leanprover.zulipchat.com/#narrow/channel/144837-PR-reviews/topic/PRs.20towards.20IMO.20geometry.202024.20P4/near/596946072 add convenience scoped instances for choosing an arbitrary orientation of a module, and for the `finrank` of the span of the vertices of a simplex.
Note: I don't understand why the latter scoped instance is only found automatically in one of the two places using it; in `Sphere/Power.lean` it's necessary to use `Affine.Simplex.fact_finrank_direction_affineSpan_eq` rather than relying on typeclass inference, but in `Angle/Sphere.lean` typeclass inference suffices.
---
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|
t-algebra
t-euclidean-geometry
maintainer-merge
label:t-algebra$ |
26/23 |
Archive/Imo/Imo2019Q2.lean,Mathlib/Geometry/Euclidean/Angle/Sphere.lean,Mathlib/Geometry/Euclidean/Sphere/Power.lean,Mathlib/LinearAlgebra/AffineSpace/FiniteDimensional.lean,Mathlib/LinearAlgebra/Orientation.lean |
5 |
9 |
['YaelDillies', 'github-actions', 'jsm28', 'mathlib-merge-conflicts'] |
eric-wieser assignee:eric-wieser |
8-21016 8 days ago |
8-21685 8 days ago |
77-86137 77 days |
| 33664 |
ooovi author:ooovi |
feat(Geometry/Convex/Cone/Pointed): face lattice of pointed cones |
- Define PointedCone.IsFaceOf, for a pointed cone being a face of another pointed cone.
- Prove some basic properties, that faces are extreme sets of their cone, and how they behave under intersection, map and product operations.
- Define `Face` by bundling the `IsFaceOf` structure, and show the complete lattice structure on it.
- Prove that taking the product of two faces is an order isomorphism.
Co-authored-by: Martin Winter
---
- [x] depends on: #33780 for the definition of the lineal space
- [x] depends on: #39185 for `isFaceOf`
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|
t-convex-geometry
maintainer-merge
|
202/0 |
Mathlib.lean,Mathlib/Geometry/Convex/Cone/Face/Lattice.lean |
2 |
205 |
['YaelDillies', 'eric-wieser', 'github-actions', 'martinwintermath', 'mathlib-dependent-issues', 'mathlib4-merge-conflict-bot', 'ooovi', 'vihdzp'] |
nobody |
8-13032 8 days ago |
19-21354 19 days ago |
25-16099 25 days |
| 41814 |
JovanGerb author:JovanGerb |
fix(CategoryTheory/Limits/VanKampen): backport fix for lean#8883 |
This PR contains the fix that I had to make to get https://github.com/leanprover/lean4/pull/8883 working. When looking into this, I had concluded that the original proof should not have worked in the first place.
This was the only such failure that was present in mathlib.
I think having this fix will be helpful when work on the unification performance issue is resumed.
---
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|
t-category-theory
maintainer-merge
|
1/1 |
Mathlib/CategoryTheory/Limits/VanKampen.lean |
1 |
3 |
['github-actions', 'grunweg'] |
nobody |
8-12164 8 days ago |
23-10507 23 days ago |
23-10283 23 days |
| 42281 |
grunweg author:grunweg |
chore: tweak API for modelWithCornersEuclideanHalfSpace |
- un-simp `modelWithCornersEuclideanHalfSpace_toFun`: in applications, this is not always the change you want to make.
- instead, add an _apply lemma (and make that simp); that's much better
- add `modelWithCornersEuclideanHalfSpace_symm_apply_of_le`, a more useful version of `modelWithCornersEuclideanHalfSpace_symm_apply`. It cannot be used to golf proofs easily, but it's a *much* more useful rewrite lemma.
- add analogous lemmas for `modelWithCornersEuclideanQuadrant`
Inspired by questions arising in `scholzhannah`'s master's thesis.
---
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[](https://gitpod.io/from-referrer/)
|
t-differential-geometry
maintainer-merge
|
23/1 |
Mathlib/Geometry/Manifold/Instances/Real.lean |
1 |
10 |
['github-actions', 'grunweg', 'scholzhannah'] |
scholzhannah assignee:scholzhannah |
7-85938 7 days ago |
8-10203 8 days ago |
9-6763 9 days |
| 40925 |
JovanGerb author:JovanGerb |
chore(CategoryTheory/Functor/Category): don't expose `NatTrans.hcomp` |
This PR hides the definition of `NatTrans.hcomp`, because it has two equally sensible possible definitions. As a result, we can get rid of the `to_dual_insert_cast`. `simps` doesn't work for non-exposed definition, so `hcomp_app` is proved separately, and its dual `hcomp_app'` is added.
Note: some proofs break, because the `dsimp` set changes, due to the definition not being exposed. This is a bit unfortunate. There was some discussion on Zulip about changing `dsimp` for category theory into a simp set, which would fix this problem, because we could then add `hcomp_app` to this set.
---
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|
maintainer-merge
tech debt
|
31/17 |
Mathlib/Algebra/Homology/HomologicalComplex.lean,Mathlib/AlgebraicTopology/DoldKan/NCompGamma.lean,Mathlib/AlgebraicTopology/DoldKan/PInfty.lean,Mathlib/CategoryTheory/Functor/Category.lean,Mathlib/CategoryTheory/Monoidal/Action/End.lean,Mathlib/CategoryTheory/Monoidal/End.lean,Mathlib/CategoryTheory/Triangulated/TStructure/SpectralObject.lean,Mathlib/CategoryTheory/Types/Basic.lean |
8 |
20 |
['JovanGerb', 'github-actions', 'grunweg', 'leanprover-radar', 'mathlib-merge-conflicts', 'riccardobrasca'] |
nobody |
7-64396 7 days ago |
7-65360 7 days ago |
45-34434 45 days |
| 41194 |
RemyDegenne author:RemyDegenne |
feat: define `riskIncrease` (statistical information) |
This PR adds a measure of the information in a statistical experiment: the increase of risk that follows from discarding the result of the experiment.
---
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|
t-measure-probability
maintainer-merge
|
139/0 |
Mathlib.lean,Mathlib/Probability/Decision/RiskIncrease.lean,docs/references.bib |
3 |
5 |
['EtienneC30', 'github-actions'] |
EtienneC30 assignee:EtienneC30 |
7-24053 7 days ago |
2-24159 2 days ago |
36-72941 36 days |
| 38214 |
emlis42 author:emlis42 |
feat(Algebra/ContinuedFractions): add Euler's continued fraction |
This PR formalizes Euler continued fractions by providing `euler` which construct one by giving head term and coefficients with some basic property.
We also introduce a transformation `GenContFract.toEuler` that maps a generalized continued fraction `g : GenContFract K` to an equivalent Euler continued fraction. |
new-contributor
t-algebra
maintainer-merge
label:t-algebra$ |
364/0 |
Mathlib.lean,Mathlib/Algebra/ContinuedFractions/Euler.lean |
2 |
74 |
['YaelDillies', 'emlis42', 'github-actions', 'mathlib-bors', 'wwylele'] |
nobody |
6-76335 6 days ago |
6-76894 6 days ago |
94-45163 94 days |
| 41529 |
kebekus author:kebekus |
feat: Émile Borel's classic "Growth Lemma" |
Establish Émile Borel's classic **Growth Lemma**: if `S : ℝ → ℝ` is monotone on `Set.Ici a` and satisfies `1 ≤ S` there, then
`∀ᶠ r in volume.cofinite ⊓ atTop, S (r + (S r)⁻¹) ≤ 2 * S r`.
In other words: The inequality `S (r + (S r)⁻¹) ≤ 2 * S r` holds for all sufficiently large `r` outside an exceptional set `E` of finite Lebesgue measure. In Value Distribution Theory, this statement is central to the proof of the "Lemma on the Logarithmic Derivatives".
This material is used in [Project VD](https://github.com/kebekus/ProjectVD), formalizing Value Distribution Theory for meromorphic functions on the complex plane. Claude Code was used to create this PR.
---
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t-measure-probability
LLM-generated
maintainer-merge
|
142/0 |
Mathlib.lean,Mathlib/MeasureTheory/Function/BorelGrowth.lean,docs/references.bib |
3 |
7 |
['EtienneC30', 'github-actions', 'kebekus'] |
EtienneC30 assignee:EtienneC30 |
6-72741 6 days ago |
6-75133 6 days ago |
29-70684 29 days |
| 40613 |
LLaurance author:LLaurance |
feat(Probability): expectation of a binomial random variable |
---
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|
t-measure-probability
maintainer-merge
|
16/1 |
Mathlib/Probability/Distributions/Binomial.lean |
1 |
3 |
['EtienneC30', 'github-actions'] |
nobody |
5-52587 5 days ago |
54-41722 54 days ago |
54-41498 54 days |
| 40788 |
FrankieNC author:FrankieNC |
feat: uniformly integrable Lᵖ tails tend to 0 uniformly |
Adds `UniformIntegrable.tendsto_iSup_eLpNorm_indicator_atTop`: for a uniformly
integrable family `f`,
Tendsto (fun M ↦ ⨆ i, eLpNorm ({x | M ≤ ‖f i x‖₊}.indicator (f i)) p μ) atTop (𝓝 0).
This is the `Tendsto` companion to the existing `UniformIntegrable.spec`, which only
provides, for each `ε`, a single threshold `C`.
This is the form that arises when truncating an L¹/Lᵖ family at increasing norm
levels — e.g. vector-valued truncation / Komlós-type arguments — where the existing
ProbabilityTheory.truncation does not apply, being real- and order-interval-valued.
---
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|
t-measure-probability
brownian
maintainer-merge
|
113/5 |
Mathlib/MeasureTheory/Function/UniformIntegrable.lean |
1 |
22 |
['CoolRmal', 'EtienneC30', 'FrankieNC', 'github-actions'] |
EtienneC30 assignee:EtienneC30 |
5-15728 5 days ago |
5-21243 5 days ago |
49-62368 49 days |
| 41799 |
FrankieNC author:FrankieNC |
feat(Topology/MetricSpace): differentiable maps do not increase Hausdorff dimension |
Add the Luzin N property of differentiable maps and deduce that differentiable maps do not increase Hausdorff dimension, over any nontrivially normed field with no finite-dimensionality or separability assumptions:
- `MeasureTheory.Measure.isSeparable_of_hausdorffMeasure_ne_top`: a set with `μH[d] s ≠ ∞` is separable
- `DifferentiableOn.hausdorffMeasure_image_eq_zero`: if `f` is differentiable on `t` and `μH[d] t = 0` for some `0 ≤ d`, then `μH[d] (f '' t) = 0`
- `DifferentiableOn.dimH_image_le`: `dimH (f '' t) ≤ dimH t`, as a corollary of the Luzin N property
- `Differentiable.dimH_range_le`, `DifferentiableOn.dense_compl_image_of_dimH_lt_finrank`, `Differentiable.dense_compl_range_of_finrank_lt_finrank`: differentiable versions of the Sard-type corollaries; `dense_compl_of_dimH_lt_finrank` and these corollaries also drop `FiniteDimensional` instance assumptions that already follow from their hypotheses
This resolves the TODO on `ContDiffOn.dimH_image_le`: the `Convex ℝ s` hypothesis is not needed. The four `ContDiff`/`ContDiffOn` lemmas (`ContDiffOn.dimH_image_le`, `ContDiff.dimH_range_le`, `ContDiffOn.dense_compl_image_of_dimH_lt_finrank`, `ContDiff.dense_compl_range_of_finrank_lt_finrank`) are deprecated in favour of the `Differentiable` versions. |
t-topology
maintainer-merge
|
103/28 |
Mathlib/MeasureTheory/Measure/Hausdorff.lean,Mathlib/Topology/MetricSpace/HausdorffDimension.lean |
2 |
18 |
['CoolRmal', 'FrankieNC', 'github-actions'] |
CoolRmal assignee:CoolRmal |
4-52824 4 days ago |
5-17406 5 days ago |
22-52514 22 days |
| 41656 |
joelriou author:joelriou |
feat(AlgebraicTopology): order relation between simplices of the nerve of a partial order |
This is applied to the characterization of the order relation between simplices of `Δ[p] ⊗ Δ[q]`.
---
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|
t-algebraic-topology
maintainer-merge
|
64/2 |
Mathlib/AlgebraicTopology/SimplicialSet/NerveNondegenerate.lean,Mathlib/AlgebraicTopology/SimplicialSet/ProdStdSimplex.lean,Mathlib/AlgebraicTopology/SimplicialSet/Subcomplex.lean |
3 |
6 |
['github-actions', 'joelriou', 'robin-carlier'] |
nobody |
4-33919 4 days ago |
23-12873 23 days ago |
26-27876 26 days |
| 42418 |
FrankieNC author:FrankieNC |
chore(Data/Finset/Prod): state `singleton_product`/`product_singleton` via `sectR`/`sectL` |
The embeddings in the statements of `Finset.singleton_product` and `Finset.product_singleton` are `Function.Embedding.sectR`/`sectL` written out as anonymous constructors. Restate them via the named embeddings (the statements are definitionally unchanged), so call sites can rewrite with the `sectR_apply`/`sectL_apply` simp lemmas instead of `Embedding.coeFn_mk`. Update the two call sites that did the latter, and golf `singleton_product_singleton`, which is now `rfl`.
Preparation for a follow-up PR replacing the `aesop` proofs of the `{Icc,Ico,Ioc,Ioo,uIcc}_map_{sectL,sectR}` lemmas in `Order/Interval/Finset/Basic`.
|
t-topology
easy
maintainer-merge
|
5/8 |
Mathlib/Analysis/Fourier/FourierTransformDeriv.lean,Mathlib/Data/Finset/Prod.lean,Mathlib/Topology/EMetricSpace/PairReduction.lean |
3 |
2 |
['github-actions', 'grunweg'] |
nobody |
4-24985 4 days ago |
4-57719 4 days ago |
4-57495 4 days |
| 41498 |
pepamontero author:pepamontero |
feat(Analysis/SpecificLimits/Normed): the sum ∑' n, n ^ k * r ^ n via Stirling numbers |
For `‖r‖ < 1`, compute `∑' n : ℕ, n ^ k * r ^ n` as the finite sum `∑ j ∈ range (k + 1), S(k, j) * j ! * r ^ j / (1 - r) ^ (j + 1)`, where `S(k, j)` are the Stirling numbers of the second kind.
**Motivation:** a special case of `tsum_sq_mul_geometric_of_norm_lt_one` over `ℂ` was proved in the FLT project and is generalized here to match the surrounding Mathlib API; the private FLT lemma can then be replaced by this one.
**Main additions to `Normed.lean`:**
- The general power formula:
- `hasSum_pow_mul_geometric_of_norm_lt_one'` / `tsum_pow_mul_geometric_of_norm_lt_one'`: for `‖r‖ < 1` in a general ring, `∑' n, n ^ k * r ^ n = ∑ j ∈ range (k + 1), S(k, j) * j ! * r ^ j * ((1 - r)⁻¹ʳ) ^ (j + 1)`.
- `hasSum_pow_mul_geometric_of_norm_lt_one` / `tsum_pow_mul_geometric_of_norm_lt_one`: the same in a field, with `/ (1 - r) ^ (j + 1)`.
- The `descFactorial` special case that supplies each term of that sum:
- `hasSum_descFactorial_mul_geometric_of_norm_lt_one'` / `tsum_descFactorial_mul_geometric_of_norm_lt_one'`: for `‖r‖ < 1` in a general ring, `∑' n, n.descFactorial j * r ^ n = j ! * r ^ j * ((1 - r)⁻¹ʳ) ^ (j + 1)`.
- `hasSum_descFactorial_mul_geometric_of_norm_lt_one` / `tsum_descFactorial_mul_geometric_of_norm_lt_one`: the field versions, with `/ (1 - r) ^ (j + 1)`.
**Additions to other files:**
- `Combinatorics/Enumerative/Stirling.lean`: `Nat.pow_eq_sum_stirlingSecond_mul_descFactorial`, expressing every power `n ^ k` as a linear combination `n ^ k = ∑ j ∈ range (k + 1), stirlingSecond k j * n.descFactorial j`.
- `Data/Nat/Factorial/Basic.lean`: `Nat.descFactorial_mul_self`, the identity `n.descFactorial j * n = n.descFactorial (j + 1) + j * n.descFactorial j`, used in the induction proving the Stirling result above.
**Other changes:**
- `summable_pow_mul_geometric_of_norm_lt_one` (statement unchanged) is now a one-line consequence of the general formula; its previous proof via `ascPochhammer` is deleted, so the `RingTheory.Polynomial.Pochhammer` import is no longer needed.
- The statement of `summable_descFactorial_mul_geometric_of_norm_lt_one` changes from the shifted summand `(n + k).descFactorial k * r ^ n` to `n.descFactorial k * r ^ n`, to match the new `hasSum`/`tsum` lemmas. It had no other uses in Mathlib, and the shifted form is recoverable in one line from `summable_choose_mul_geometric_of_norm_lt_one`.
- The proof of `hasSum_coe_mul_geometric_of_norm_lt_one'` (`k = 1`) is simplified using the general formula, and the `k = 2` case is added: `∑' n, n ^ 2 * r ^ n = r * (1 + r) / (1 - r) ^ 3` (`hasSum_sq_mul_geometric_of_norm_lt_one'` and the three companion lemmas).
- The redundant imports mentioned above have now been removed; this required import edits in 8 dependent files that had relied on them transitively.
**AI Disclosure**: this code originated in the FLT project, where an initial version was written by William Coram and Samuel Yin with AI assistance (Claude, later cleaned up with Codex). It has since been substantially rewritten for this PR; little of the original generated code remains.
Co-authored-by: Malhar A. Patel <142735852+Mal-Pat@users.noreply.github.com>
Co-authored-by: William Coram
Co-authored-by: Samuel Yin
---
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new-contributor
large-import
t-analysis
maintainer-merge
|
195/83 |
Mathlib/Analysis/Calculus/ContDiff/Defs.lean,Mathlib/Analysis/SpecialFunctions/OrdinaryHypergeometric.lean,Mathlib/Analysis/SpecialFunctions/Pochhammer.lean,Mathlib/Analysis/SpecialFunctions/PolynomialExp.lean,Mathlib/Analysis/SpecialFunctions/Pow/Deriv.lean,Mathlib/Analysis/SpecialFunctions/Trigonometric/Basic.lean,Mathlib/Analysis/SpecificLimits/Normed.lean,Mathlib/Combinatorics/Enumerative/Stirling.lean,Mathlib/Data/Nat/Factorial/Basic.lean,Mathlib/InformationTheory/Coding/KraftMcMillan.lean,Mathlib/Topology/Instances/CantorSet.lean |
11 |
34 |
['Mal-Pat', 'YaelDillies', 'github-actions', 'grunweg', 'pepamontero'] |
nobody |
4-17066 4 days ago |
22-68504 22 days ago |
28-4830 28 days |
| 42415 |
j-loreaux author:j-loreaux |
feat: generalize type class assumptions for `PositiveLinearMap.preGNS` and prove the Cauchy-Schwarz lemma |
In particular, we show:
```lean
lemma norm_map_star_mul_le (f : A →ₚ[ℂ] ℂ) (x y : A) :
‖f (star x * y)‖ ≤ √‖f (star x * x)‖ * √‖f (star y * y)‖
```
for `A` a non-unital star-ordered `ℂ`-algebra (and we create an alias `cauchy_schwarz_star_mul` for discoverability). The generalization away from C⋆-algebras allows this material to be used for type synonyms of C⋆-algebras with alternative topologies.
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|
t-analysis
maintainer-merge
|
48/3 |
Mathlib/Analysis/CStarAlgebra/GelfandNaimarkSegal.lean |
1 |
9 |
['github-actions', 'j-loreaux', 'themathqueen'] |
nobody |
3-83040 3 days ago |
4-1302 4 days ago |
4-62750 4 days |
| 42156 |
tb65536 author:tb65536 |
doc(Algebra/Module/ZLattice/Basic): fix `ZLattice.comap` docstring |
The linear map in the `ZLattice.comap` docstring was the wrong way around.
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t-ring-theory
t-algebra
documentation
easy
maintainer-merge
label:t-algebra$ |
5/5 |
Mathlib/Algebra/Module/ZLattice/Basic.lean |
1 |
3 |
['github-actions', 'joneugster', 'plp127'] |
joneugster assignee:joneugster |
3-82045 3 days ago |
11-69188 11 days ago |
11-68966 11 days |
| 41503 |
JovanGerb author:JovanGerb |
feat(GRewrite): support strict rewriting in `>`/`≥` |
This PR adds `gcongr strict` tags in order to support strict rewriting in `≥`/`>`. Previously this only worked in `≤`/`<`.
---
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|
t-meta
maintainer-merge
|
9/0 |
Mathlib/Order/Basic.lean,MathlibTest/Tactic/GRewrite.lean |
2 |
4 |
['JovanGerb', 'github-actions', 'grunweg'] |
nobody |
3-80660 3 days ago |
31-411 31 days ago |
31-187 31 days |
| 38664 |
joelriou author:joelriou |
feat(AlgebraicTopology/SimplicialSet): more API for `SSet.op` |
---
- [x] depends on: #38662
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|
t-algebraic-topology
tech debt
maintainer-merge
|
136/36 |
Mathlib/AlgebraicTopology/SimplexCategory/Rev.lean,Mathlib/AlgebraicTopology/SimplicialObject/Op.lean,Mathlib/AlgebraicTopology/SimplicialSet/KanComplex/MulStruct.lean,Mathlib/AlgebraicTopology/SimplicialSet/Op.lean,Mathlib/AlgebraicTopology/SimplicialSet/StdSimplex.lean |
5 |
18 |
['github-actions', 'joelriou', 'mathlib-dependent-issues', 'mathlib-merge-conflicts', 'robin-carlier'] |
dagurtomas assignee:dagurtomas |
3-72258 3 days ago |
3-73474 3 days ago |
42-81530 42 days |
| 42266 |
menon-codes author:menon-codes |
refactor: making trans usage explicit with kerLift |
Slightly simplifies the argument used in `exists_integral_inj_algHom_of_quotient` for clarity.
This is also needed to fix a small edge case present in a linter I am making as discussed here: [#mathlib4 > Linter for ellipsis @ 💬](https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/Linter.20for.20ellipsis/near/613523943) |
t-ring-theory
new-contributor
maintainer-merge
|
2/5 |
Mathlib/RingTheory/NoetherNormalization.lean |
1 |
8 |
['copilot-pull-request-reviewer', 'github-actions', 'grunweg', 'menon-codes'] |
nobody |
3-69843 3 days ago |
4-1576 4 days ago |
9-43858 9 days |
| 42270 |
JovanGerb author:JovanGerb |
chore: remove more backward options that are blocking `scripts/rm_set_option.py` |
This PR removes some backward options that can be removed, but in doing so trigger the unused simp arguments linter.
See also [Zulip](https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/4.2E33.2E0-rc1.20Multiple.20.60respectTransparency.60-related.20issues/near/613533366)
---
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|
tech debt
maintainer-merge
merge-conflict
|
13/31 |
Mathlib/Algebra/Category/Grp/Colimits.lean,Mathlib/Algebra/Homology/Opposite.lean,Mathlib/Condensed/Discrete/LocallyConstant.lean,Mathlib/MeasureTheory/VectorMeasure/Integral.lean,Mathlib/Probability/Kernel/Disintegration/MeasurableStieltjes.lean,Mathlib/RingTheory/LaurentSeries.lean,Mathlib/RingTheory/Valuation/Basic.lean,Mathlib/Topology/Category/TopCat/Limits/Products.lean |
8 |
3 |
['github-actions', 'grunweg', 'mathlib-merge-conflicts'] |
nobody |
3-56693 3 days ago |
3-56693 3 days ago |
6-2652 6 days |
| 42341 |
gaetanserre author:gaetanserre |
feat(Kernel/Deterministic): any deterministic kernel is s-finite |
Any deterministic kernel is s-finite.
---
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|
t-measure-probability
maintainer-merge
|
11/0 |
Mathlib/Probability/Kernel/Deterministic.lean |
1 |
7 |
['CoolRmal', 'github-actions'] |
CoolRmal assignee:CoolRmal |
3-56059 3 days ago |
3-56059 3 days ago |
6-15827 6 days |
| 40812 |
karlesmarin author:karlesmarin |
feat(RingTheory/HopfAlgebra): antipode is the unique convolution inverse of the identity |
Adds `HopfAlgebra.eq_antipode_of_convMul_id_eq_one` and `HopfAlgebra.eq_antipode_of_id_convMul_eq_one`: an `R`-linear map that is a one-sided convolution inverse of the identity equals the antipode. Either side suffices.
The proof is `left_inv_eq_right_inv` in the convolution monoid `WithConv (A →ₗ[R] A)` together with the two antipode axioms, transported by `toConv_injective`. It closes the "uniqueness of Hopf algebra structure on a bialgebra" TODO in this file, and is the uniqueness companion to the existing `ofConvInverse` (existence).
---
**AI disclosure.** This contribution was written with AI assistance (Claude, used as a coding assistant). I have reviewed and understand the proof and can justify the design. The result is classical; the contribution is its Lean formalization.
|
t-ring-theory
new-contributor
LLM-generated
maintainer-merge
|
17/3 |
Mathlib/RingTheory/HopfAlgebra/Basic.lean,Mathlib/RingTheory/HopfAlgebra/Convolution.lean |
2 |
24 |
['YaelDillies', 'github-actions', 'hawkrobe', 'karlesmarin', 'themathqueen'] |
nobody |
3-18531 3 days ago |
3-18555 3 days ago |
39-22282 39 days |
| 42477 |
Multramate author:Multramate |
feat(NumberTheory/EllipticDivisibilitySequence): add some lemmas and grind some proofs |
Also rename `odd` to `neg` because `odd` will be reserved for odd elliptic relations.
---
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|
t-number-theory
t-algebra
maintainer-merge
label:t-algebra$ |
95/53 |
Mathlib/Data/Nat/DvdSequence.lean,Mathlib/NumberTheory/EllipticDivisibilitySequence.lean |
2 |
5 |
['Multramate', 'github-actions', 'tb65536'] |
nobody |
3-5783 3 days ago |
3-9933 3 days ago |
3-9709 3 days |
| 41244 |
joelriou author:joelriou |
chore(CategoryTheory/Adjunction/AdjointFunctorTheorems): generalize universes |
For theorems involving a category `C : Type u` (with `Category.{v} C`), the smallness assumptions or the existence of limits/colimits are expressed relative to an arbitrary universe `w` (instead of `w = v`), provided the assumption `LocallySmall.{w} C` is added. (This makes this more coherent with the API about locally presentable/accessible categories.)
---
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|
t-category-theory
maintainer-merge
|
71/36 |
Mathlib/CategoryTheory/Adjunction/AdjointFunctorTheorems.lean,Mathlib/CategoryTheory/Comma/StructuredArrow/Small.lean,Mathlib/CategoryTheory/Limits/Constructions/WeaklyInitial.lean,Mathlib/CategoryTheory/Limits/Shapes/WideEqualizers.lean |
4 |
7 |
['github-actions', 'robin-carlier', 'smorel394'] |
robin-carlier assignee:robin-carlier |
2-83129 2 days ago |
34-69702 34 days ago |
37-61326 37 days |
| 41514 |
teorth author:teorth |
feat(Topology/MetricSpace/Heine-Cantor): metric ε-δ forms of Heine–Cantor |
Add (pseudo-)metric space (or "epsilon-delta") versions of many of the versions of the Heine-Cantor theorem (continuous functions on compacta are uniformly continuous) from `Topology.UniformSpace.HeineCantor` into a new file
`Topology.Metric.HeineCantor`. As per reviewer feedback, EMetric variants are also provided at `Topology.EMetric.HeineCantor`.
---
New files needed to be created because many files downstream of `Topology.UniformSpace.HeineCantor` blocked the use of `UniformOnFun`.
AI assistance was used to expand a small initial set of human-generated lemmas into a larger set, with the latter then reviewed by both an AI tool and myself.
[](https://gitpod.io/from-referrer/)
|
t-topology
maintainer-merge
|
161/0 |
Mathlib.lean,Mathlib/Topology/EMetricSpace/Defs.lean,Mathlib/Topology/EMetricSpace/HeineCantor.lean,Mathlib/Topology/MetricSpace/HeineCantor.lean |
4 |
14 |
['felixpernegger', 'github-actions', 'j-loreaux', 'teorth'] |
j-loreaux assignee:j-loreaux |
2-66909 2 days ago |
12-6757 12 days ago |
30-33207 30 days |
| 41641 |
adomani author:adomani |
chore: add missing `to_additive` docstrings in GroupTheory |
Adds the missing additive doc-strings (multiplicative side has a hand-written doc-string, additive side did not) across 17 file(s) in **GroupTheory**.
The additive doc-strings are simple-minded translations of the multiplicative ones, with referenced lemma names replaced by their `to_additive` counterparts. These gaps were found by an environment linter that pairs each declaration with its `to_additive` counterpart and checks that both or neither is documented.
🤖 Generated with [Claude Code](https://claude.com/claude-code) |
LLM-generated
t-group-theory
maintainer-merge
awaiting-requeue
|
68/33 |
Mathlib/GroupTheory/Congruence/Hom.lean,Mathlib/GroupTheory/Coset/Defs.lean,Mathlib/GroupTheory/CosetCover.lean,Mathlib/GroupTheory/Exponent.lean,Mathlib/GroupTheory/FinitelyPresentedGroup.lean,Mathlib/GroupTheory/FreeGroup/Basic.lean,Mathlib/GroupTheory/MonoidLocalization/Lemmas.lean,Mathlib/GroupTheory/Nilpotent.lean,Mathlib/GroupTheory/NoncommPiCoprod.lean,Mathlib/GroupTheory/OreLocalization/Basic.lean,Mathlib/GroupTheory/OreLocalization/OreSet.lean,Mathlib/GroupTheory/Perm/Cycle/Type.lean,Mathlib/GroupTheory/QuotientGroup/Defs.lean,Mathlib/GroupTheory/ResiduallyFinite.lean,Mathlib/GroupTheory/SpecificGroups/Cyclic.lean,Mathlib/GroupTheory/SpecificGroups/KleinFour.lean,Mathlib/GroupTheory/Submonoid/Center.lean |
17 |
4 |
['github-actions', 'mathlib-bors', 'mathlib-merge-conflicts', 'riccardobrasca', 'tb65536'] |
nobody |
2-43221 2 days ago |
10-6603 10 days ago |
16-83176 16 days |
| 37232 |
mathlib-splicebot author:mathlib-splicebot |
chore(Algebra/Order): bound on `|n / m|ₘ` and `|n - m|` |
This PR was automatically created from PR #34722 by @GrigorenkoPV via a [review comment](https://github.com/leanprover-community/mathlib4/pull/34722#discussion_r2996870566) by @Vierkantor. |
t-algebra
maintainer-merge
label:t-algebra$ |
5/0 |
Mathlib/Algebra/Order/Group/Unbundled/Abs.lean |
1 |
14 |
['Vierkantor', 'bryangingechen', 'github-actions', 'grunweg', 'mathlib-bors', 'themathqueen'] |
nobody |
2-23152 2 days ago |
8-4014 8 days ago |
45-37382 45 days |
| 41121 |
Scarlett-le author:Scarlett-le |
feat(Geometry/Euclidean/Angle): add the Alternate segment theorem |
Adds the Alternate segment theorem to`Mathlib/Geometry/Euclidean/Angle/Sphere.lean`:
if a line is tangent to a sphere `s` at `p₁`
and `p₁`, `p₂`, `p₃` lie on `s`, then twice the oriented angle from the tangent to the chord
`p₁p₂` equals twice the inscribed angle subtending `p₁p₂` at `p₃`. As elsewhere in this file,
the angles are doubled because the underlying oriented angles agree only mod `π`.
----
- [x] depends on: #41143 |
t-euclidean-geometry
maintainer-merge
|
27/0 |
Mathlib/Geometry/Euclidean/Angle/Sphere.lean |
1 |
7 |
['felixpernegger', 'github-actions', 'jsm28', 'mathlib-dependent-issues', 'mathlib-merge-conflicts'] |
nobody |
2-23140 2 days ago |
37-45254 37 days ago |
40-3884 40 days |
| 41154 |
sgouezel author:sgouezel |
feat: the variation of a Stieltjes vector measure |
---
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|
t-measure-probability
maintainer-merge
|
330/5 |
Mathlib/MeasureTheory/VectorMeasure/BoundedVariation.lean,Mathlib/MeasureTheory/VectorMeasure/Variation/Basic.lean |
2 |
20 |
['EtienneC30', 'github-actions', 'mathlib-merge-conflicts', 'sgouezel'] |
EtienneC30 assignee:EtienneC30 |
2-10441 2 days ago |
3-18139 3 days ago |
38-125 38 days |
| 42375 |
TJHeeringa author:TJHeeringa |
feat(Analysis/Normed): add `LinearMap.extendOfIsometry` |
Adds `LinearMap.extendOfIsometry`, the extention of a linear map `f : E →ₛₗ[𝕜] F` between normed spaces to a linear isometry `Eₗ →ₗᵢ[𝕜] Fₗ` between Banach spaces with a dense map `e₁ : E →ₗ[𝕜] Eₗ`, a linear map `e₂ : F →ₗ[𝕜] Fₗ` and the corresponding norm estimate.
---
`LinearEquiv` and `ContinuousLinearMap` have this extension, but a corresponding one for `LinearIsometry` does not exist.
I called this `extendOfIsometry` because `LinearIsometry.extend` map already [exists](https://leanprover-community.github.io/mathlib4_docs/Mathlib/Analysis/InnerProductSpace/PiL2.html#LinearIsometry.extend) and `LinearEquiv` has a similar map. That map is the special case of `LinearIsometry.extendOfIsometry` when the input space is a submodule of a finite dimensional inner product space. A case could be made for calling `LinearIsometry.extendOfIsometry` `LinearIsometry.extend` and renaming the existing `LinearIsometry.extendOfIsometry` to `LinearIsometry.extendOfFin`.
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t-analysis
maintainer-merge
|
42/5 |
Mathlib/Analysis/Normed/Operator/Extend.lean |
1 |
28 |
['TJHeeringa', 'github-actions', 'mcdoll', 'wwylele'] |
mcdoll assignee:mcdoll |
1-57971 1 day ago |
2-30074 2 days ago |
4-48103 4 days |
| 41818 |
Vierkantor author:Vierkantor |
feat(Tactic/Linter): add linter for missing `@[tactic_alt]` tags |
This PR adds a `tacticAlt` linter that complains when there are two tactics with the same user-facing name (usually: the first token in their syntax) but they aren't marked as `@[tactic_alt]` to each other. Those situations lead to duplicate entries in doc-gen's tactic overview page.
You can see example output in the tests file, or in the [build log](https://github.com/leanprover-community/mathlib4/actions/runs/29502419244/job/87654684693).
The current simple implementation has one limitation: if multiple duplicates are all being linted at once, each of them gets a linter warning. I think this is okay, but we could be a bit stricter and only produce the warning on the tactic that comes later in the environment.
---
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|
t-linter
maintainer-merge
|
75/0 |
Mathlib/Tactic/ApplyAt.lean,Mathlib/Tactic/ClearExcept.lean,Mathlib/Tactic/Linter/TacticDocumentation.lean,MathlibTest/Linter/TacticDoc.lean |
4 |
6 |
['JovanGerb', 'adomani', 'github-actions', 'leanprover-radar'] |
nobody |
1-52591 1 day ago |
22-79492 22 days ago |
22-79280 22 days |
| 42075 |
Parcly-Taxel author:Parcly-Taxel |
chore: delete deprecated declarations/modules from January 2026 |
`Mathlib.Util.MemoFix` is directly removed since all deprecations in it are more than 6 months old. |
tech debt
file-removed
maintainer-merge
|
1/2758 |
Mathlib.lean,Mathlib/Algebra/Algebra/Basic.lean,Mathlib/Algebra/Algebra/Epi.lean,Mathlib/Algebra/Algebra/NonUnitalSubalgebra.lean,Mathlib/Algebra/BigOperators/Finprod.lean,Mathlib/Algebra/Category/ModuleCat/Semi.lean,Mathlib/Algebra/Category/Ring/Epi.lean,Mathlib/Algebra/Group/Basic.lean,Mathlib/Algebra/Group/Int/Defs.lean,Mathlib/Algebra/GroupWithZero/Action/Defs.lean,Mathlib/Algebra/GroupWithZero/Basic.lean,Mathlib/Algebra/GroupWithZero/Defs.lean,Mathlib/Algebra/GroupWithZero/Int.lean,Mathlib/Algebra/GroupWithZero/NonZeroDivisors.lean,Mathlib/Algebra/GroupWithZero/Regular.lean,Mathlib/Algebra/ModEq.lean,Mathlib/Algebra/Module/Hom.lean,Mathlib/Algebra/Module/LinearMap/End.lean,Mathlib/Algebra/NoZeroSMulDivisors/Prod.lean,Mathlib/Algebra/Order/Archimedean/Real/Basic.lean,Mathlib/Algebra/Polynomial/Degree/Definitions.lean,Mathlib/Algebra/Polynomial/Splits.lean,Mathlib/Algebra/Ring/Regular.lean,Mathlib/AlgebraicGeometry/Artinian.lean,Mathlib/AlgebraicGeometry/Cover/MorphismProperty.lean,Mathlib/AlgebraicGeometry/Morphisms/ClosedImmersion.lean,Mathlib/AlgebraicGeometry/Morphisms/FinitePresentation.lean,Mathlib/AlgebraicGeometry/Morphisms/FiniteType.lean,Mathlib/AlgebraicGeometry/Morphisms/Flat.lean,Mathlib/AlgebraicGeometry/Morphisms/FormallyUnramified.lean,Mathlib/AlgebraicGeometry/Morphisms/OpenImmersion.lean,Mathlib/AlgebraicGeometry/Morphisms/Preimmersion.lean,Mathlib/AlgebraicGeometry/Morphisms/Separated.lean,Mathlib/AlgebraicGeometry/Morphisms/SurjectiveOnStalks.lean,Mathlib/AlgebraicGeometry/Morphisms/UniversallyClosed.lean,Mathlib/AlgebraicGeometry/Morphisms/UniversallyOpen.lean,Mathlib/AlgebraicTopology/FundamentalGroupoid/SimplyConnected.lean,Mathlib/AlgebraicTopology/ModelCategory/CofibrantObjectHomotopy.lean,Mathlib/Analysis/Analytic/Composition.lean,Mathlib/Analysis/Asymptotics/AsymptoticEquivalent.lean,Mathlib/Analysis/Calculus/Deriv/Mul.lean,Mathlib/Analysis/Calculus/FDeriv/Add.lean,Mathlib/Analysis/Calculus/Implicit.lean,Mathlib/Analysis/Calculus/ImplicitContDiff.lean,Mathlib/Analysis/Calculus/TangentCone/Basic.lean,Mathlib/Analysis/Complex/IntegerCompl.lean,Mathlib/Analysis/Complex/Schwarz.lean,Mathlib/Analysis/Complex/TaylorSeries.lean,Mathlib/Analysis/Complex/UnitDisc/Basic.lean,Mathlib/Analysis/Complex/UpperHalfPlane/Basic.lean,Mathlib/Analysis/Convex/Body.lean,Mathlib/Analysis/Distribution/FourierSchwartz.lean,Mathlib/Analysis/Distribution/SchwartzSpace.lean,Mathlib/Analysis/Distribution/SchwartzSpace/Fourier.lean,Mathlib/Analysis/Distribution/TemperedDistribution.lean,Mathlib/Analysis/Fourier/Notation.lean,Mathlib/Analysis/InnerProductSpace/Orthogonal.lean,Mathlib/Analysis/InnerProductSpace/PiL2.lean,Mathlib/Analysis/LocallyConvex/Barrelled.lean,Mathlib/Analysis/Matrix/Spectrum.lean,Mathlib/Analysis/Normed/Group/Basic.lean,Mathlib/Analysis/Normed/Group/Pointwise.lean,Mathlib/Analysis/Normed/Module/Ball/Pointwise.lean,Mathlib/Analysis/Normed/Order/Basic.lean,Mathlib/Analysis/Normed/Unbundled/SeminormFromConst.lean,Mathlib/Analysis/Polynomial/MahlerMeasure.lean,Mathlib/Analysis/Real/Hyperreal.lean,Mathlib/Analysis/SpecialFunctions/Complex/Log.lean,Mathlib/Analysis/SpecialFunctions/NonIntegrable.lean,Mathlib/Analysis/SpecialFunctions/Trigonometric/Cotangent.lean,Mathlib/CategoryTheory/Adjunction/Opposites.lean,Mathlib/CategoryTheory/Category/Grpd.lean,Mathlib/CategoryTheory/Limits/Shapes/Products.lean,Mathlib/CategoryTheory/Limits/Shapes/Pullback/CommSq.lean,Mathlib/CategoryTheory/Limits/Shapes/Pullback/Equifibered.lean,Mathlib/CategoryTheory/MorphismProperty/Basic.lean,Mathlib/CategoryTheory/Sites/IsSheafFor.lean,Mathlib/CategoryTheory/Triangulated/TStructure/Basic.lean,Mathlib/Combinatorics/SimpleGraph/AdjMatrix.lean,Mathlib/Combinatorics/SimpleGraph/Coloring/Vertex.lean,Mathlib/Combinatorics/SimpleGraph/VertexCover.lean,Mathlib/Computability/Primrec.lean,Mathlib/Computability/Primrec/Basic.lean,Mathlib/Data/Finsupp/Basic.lean,Mathlib/Data/Fintype/Prod.lean,Mathlib/Data/Int/ModEq.lean,Mathlib/Data/List/Basic.lean,Mathlib/Data/List/Flatten.lean,Mathlib/Data/List/GetD.lean,Mathlib/Data/Option/Basic.lean,Mathlib/Data/Option/Defs.lean,Mathlib/Data/Set/Card.lean,Mathlib/Data/SetLike/Basic.lean,Mathlib/Data/Tree/RBMap.lean,Mathlib/FieldTheory/Isaacs.lean,Mathlib/Geometry/Manifold/PartitionOfUnity.lean,Mathlib/Geometry/Manifold/Riemannian/Basic.lean,Mathlib/Lean/Expr.lean,Mathlib/Lean/Expr/ReplaceRec.lean,Mathlib/LinearAlgebra/AffineSpace/AffineSubspace/Basic.lean |
184 |
5 |
['Parcly-Taxel', 'github-actions', 'grunweg', 'joneugster', 'mathlib-merge-conflicts'] |
joneugster assignee:joneugster |
1-41740 1 day ago |
1-45352 1 day ago |
13-83647 13 days |
| 40578 |
CoolRmal author:CoolRmal |
feat(Topology/Order): convergence of suprema and infima |
The main lemma proved in this PR is that for every function `a : ι → α`, `Tendsto (fun F : Finset ι => F.inf a) atTop (𝓝 (⨅ i, a i))`, where `α` is a complete lattice and a SupConvergenceClass. The corresponding versions for `ciSup`, `iInf`, `ciInf` are also proved. We also prove `ciSup_eq_ciSup_finset`, which is the analogue of [iSup_eq_iSup_finset](https://leanprover-community.github.io/mathlib4_docs/Mathlib/Order/CompleteLattice/Finset.html#iSup_eq_iSup_finset)
Created with the help of codex.
---
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t-topology
maintainer-merge
|
67/0 |
Mathlib/Data/Finset/Lattice/Fold.lean,Mathlib/Order/ConditionallyCompleteLattice/Finset.lean,Mathlib/Topology/Order/MonotoneConvergence.lean |
3 |
13 |
['CoolRmal', 'github-actions', 'mathlib-merge-conflicts', 'scholzhannah'] |
scholzhannah assignee:scholzhannah |
1-35274 1 day ago |
3-78841 3 days ago |
16-48865 16 days |
| 42227 |
kebekus author:kebekus |
feat: API for (co)discrete sets |
Establish simple but useful API for dealing with (co)discrete sets.
---
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|
t-topology
maintainer-merge
|
125/2 |
Mathlib/Algebra/Polynomial/Roots.lean,Mathlib/Analysis/Calculus/Deriv/Basic.lean,Mathlib/Analysis/Calculus/FDeriv/Congr.lean,Mathlib/Topology/Algebra/Polynomial.lean,Mathlib/Topology/DiscreteSubset.lean |
5 |
36 |
['CoolRmal', 'felixpernegger', 'github-actions', 'kebekus'] |
nobody |
1-32153 1 day ago |
2-28710 2 days ago |
9-74300 9 days |
| 42221 |
mcdoll author:mcdoll |
feat(Data/FunLike): add `IsTorsionFree` theorems |
Needed for `Finsupp` and `MeasureTheory.Measure`
The lemma about torsion-free monoids was contributed in #24312.
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|
t-data
large-import
maintainer-merge
|
53/12 |
Mathlib.lean,Mathlib/Algebra/Group/Finsupp.lean,Mathlib/Algebra/Group/Pi/Lemmas.lean,Mathlib/Algebra/Group/Pi/Torsion.lean,Mathlib/Algebra/Order/Antidiag/Pi.lean,Mathlib/Data/FunLike/Group.lean,Mathlib/Data/FunLike/Module.lean |
7 |
9 |
['github-actions', 'grunweg', 'joneugster', 'mcdoll'] |
joneugster assignee:joneugster |
1-31117 1 day ago |
5-44003 5 days ago |
10-28211 10 days |
| 40855 |
NoahW314 author:NoahW314 |
feat(Data/ENNReal): add `sum_div` |
`Finset.sum_div` does not apply since `ℝ≥0∞` is not a `DivisionSemiring`. Although the proof of `Finset.sum_div` (and of this lemma) only needs `DivInvMonoid` and `NonUnitalNonAssocSemiring`, the best typeclass including these is `DivisionSemiring`.
---
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Removed the `open ENNReal` in `MeanInequalities` to avoid ambiguity with `Finset.sum_div`.
|
t-data
maintainer-merge
|
7/1 |
Mathlib/Analysis/MeanInequalities.lean,Mathlib/Data/ENNReal/BigOperators.lean |
2 |
8 |
['NoahW314', 'SnirBroshi', 'github-actions', 'joneugster', 'madvorak'] |
joneugster assignee:joneugster |
1-28987 1 day ago |
5-37936 5 days ago |
48-49700 48 days |
| 41740 |
themathqueen author:themathqueen |
chore(Topology/Algebra/LinearMapCompletion): generalize `UniformSpace.Completion.toComplL` |
Generalize and move `toComplL` to a more appropriate file.
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(`toCompl`, `toComplL`, `toComplₗᵢ`, etc... aren't great names in my opinion, but that's a separate issue for another time)
(In another PR (maybe sometime in the near future), we should make the variables R and α explicit for `toCompl`, `toComplL`, and `toComplₗᵢ`.)
[](https://gitpod.io/from-referrer/)
|
t-topology
maintainer-merge
|
26/20 |
Mathlib/Analysis/InnerProductSpace/Reproducing.lean,Mathlib/Analysis/Normed/Module/Completion.lean,Mathlib/MeasureTheory/Integral/IntervalIntegral/DistLEIntegral.lean,Mathlib/Topology/Algebra/LinearMapCompletion.lean |
4 |
6 |
['TJHeeringa', 'github-actions', 'mathlib-merge-conflicts', 'scholzhannah', 'themathqueen'] |
scholzhannah assignee:scholzhannah |
1-25418 1 day ago |
3-172 2 days ago |
24-23485 24 days |
| 41361 |
lakesare author:lakesare |
feat(Order/ConditionallyCompleteLattice/Finset): add `sup_eq_ciSup` |
From the Carleson project.
___
**Upstreaming from Carleson: [/Carleson/ToMathlib/Data/Finset/Lattice/Fold.lean](https://github.com/fpvandoorn/carleson/blob/a3e427dc0f23f6b818c7f7d32f2b1d2ccfab1f21/Carleson/ToMathlib/Data/Finset/Lattice/Fold.lean)**
Changes from the Carleson version:
1. `sup_eq_iSup'` is refactored (to shorten the proof & to make some of the imports unnecessary)
2. `sup_eq_iSup'` is renamed to `sup_eq_ciSup`
3. Carleson-suggested file was `/Data/Finset/Lattice/Fold.lean`, but we placed the theorem into `/Order/ConditionallyCompleteLattice/Finset.lean`
|
carleson
new-contributor
t-order
maintainer-merge
|
8/9 |
Mathlib/Order/ConditionallyCompleteLattice/Finset.lean |
1 |
21 |
['SnirBroshi', 'github-actions', 'j-loreaux', 'lakesare', 'themathqueen'] |
nobody |
1-21750 1 day ago |
1-36352 1 day ago |
19-49207 19 days |
| 42292 |
stevenliuyi author:stevenliuyi |
feat(Probability/Kernel/Composition): kernel Radon-Nikodym derivative of composition products |
This PR resolves the TODO in this file by adding `rnDeriv_measure_compProd_right` and `rnDeriv_measure_compProd`, which replace `∂(μ ⊗ₘ κ)/∂(μ ⊗ₘ η)` by `∂κ/∂η` under the suitable assumptions.
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|
t-measure-probability
large-import
new-contributor
maintainer-merge
|
56/7 |
Mathlib/Probability/Kernel/Composition/RadonNikodym.lean |
1 |
12 |
['EtienneC30', 'github-actions', 'stevenliuyi'] |
EtienneC30 assignee:EtienneC30 |
1-16428 1 day ago |
1-37407 1 day ago |
7-72980 7 days |
| 41383 |
joelriou author:joelriou |
feat(Algebra/Category/ModuleCat): the category of sheaves of modules is Grothendieck abelian |
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[](https://gitpod.io/from-referrer/)
|
t-category-theory
maintainer-merge
|
127/5 |
Mathlib.lean,Mathlib/Algebra/Category/ModuleCat/Presheaf/Generator.lean,Mathlib/AlgebraicGeometry/Modules/Sheaf.lean,Mathlib/AlgebraicGeometry/Modules/Tilde.lean,Mathlib/CategoryTheory/Abelian/GrothendieckAxioms/PresheafOfModules.lean,Mathlib/CategoryTheory/Abelian/GrothendieckAxioms/SheafOfModules.lean,Mathlib/CategoryTheory/Generator/Basic.lean |
7 |
3 |
['alreadydone', 'github-actions'] |
nobody |
1-12543 1 day ago |
1-13234 1 day ago |
34-3206 34 days |
| 42528 |
joelriou author:joelriou |
chore(CategoryTheory): `implicit_reducible` for compositions of natural transformations |
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|
t-category-theory
easy
maintainer-merge
|
2/2 |
Mathlib/CategoryTheory/Functor/Category.lean,Mathlib/CategoryTheory/NatTrans.lean |
2 |
4 |
['github-actions', 'joelriou', 'leanprover-radar', 'robin-carlier'] |
nobody |
1-5798 1 day ago |
1-18556 1 day ago |
1-18332 1 day |
| 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 |
| 35753 |
Vilin97 author:Vilin97 |
feat(Topology/Algebra/Order): regular grid helpers and piecewise linear interpolation |
Make API for piecewise linear interpolation on regular grids. I need these to for ODE time-stepping methods, like forward Euler, and later Runge–Kutta methods.
Follow-up PR: #35755 (forward Euler method convergence).
I don't know if these numerical analysis ODE-solving methods even belong in mathlib. If someone could advise me on it, I would appreciate it.
---
The initial proof was produced by [Aristotle](https://aristotle.harmonic.fun). The code was iteratively refined (factoring out lemmas, golfing, simplifying proofs) using Claude Code.
- [ ] depends on: #38091 |
t-topology
new-contributor
LLM-generated
maintainer-merge
|
201/0 |
Mathlib.lean,Mathlib/Topology/Algebra/Order/PiecewiseLinear.lean |
2 |
59 |
['Vilin97', 'YanYablonovskiy', 'adomani', 'botbaki-review', 'copilot-pull-request-reviewer', 'dagurtomas', 'eric-wieser', 'github-actions', 'grunweg', 'j-loreaux', 'mathlib-dependent-issues', 'wwylele'] |
nobody |
65-52590 2 months ago |
98-63310 98 days ago |
131-25766 131 days |
| 41984 |
fpvandoorn author:fpvandoorn |
fix: typo in simps error messages |
* Remove trailing underscores in names `simps`-errors would erroneously print
* Restore Lean 3 error message tests.
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[](https://gitpod.io/from-referrer/)
|
t-meta
maintainer-merge
awaiting-author
|
46/27 |
Mathlib/Tactic/Simps/Basic.lean,MathlibTest/Simps.lean |
2 |
4 |
['Vierkantor', 'github-actions', 'grunweg'] |
nobody |
15-82144 15 days ago |
15-82144 15 days ago |
2-5055 2 days |
| 41976 |
fpvandoorn author:fpvandoorn |
refactor(simps): centralize notation_class and initialize_simps_projections |
* Create a single file that declares all `notation_class` attributes and `initialize_simps_projections` calls for many structures in Core.
* Some of these notation classes were previously declared in `Tactic.Simps.Basic` or in other Mathlib files. The latter was problematic, because then you could have files that import `simps` and a Core structure, but not generate the right simp lemmas.
* Make sure that we import this file instead of the internal `Tactic.Simps.Basic` file throughout Mathlib. Not importing this file can cause `simps` to generate wrong lemmas.
* Also call `initialize_simps_projections` for (some) classes that are declared in Mathlib. (This is not super important, but ensures that these projections have to be only generated once, instead of in every file that imports it.)
* This was prompted by observing faulty behavior in #40653.
---
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|
large-import
t-meta
maintainer-merge
|
170/36 |
Mathlib.lean,Mathlib/Algebra/Group/Defs.lean,Mathlib/Algebra/Notation/Defs.lean,Mathlib/CategoryTheory/Monoidal/Functor/Types.lean,Mathlib/Data/FunLike/Basic.lean,Mathlib/Data/Subtype.lean,Mathlib/Data/TwoPointing.lean,Mathlib/Logic/Equiv/Defs.lean,Mathlib/Order/Defs/LinearOrder.lean,Mathlib/Order/Notation.lean,Mathlib/Tactic.lean,Mathlib/Tactic/Common.lean,Mathlib/Tactic/ProdAssoc.lean,Mathlib/Tactic/ProxyType.lean,Mathlib/Tactic/Simps.lean,Mathlib/Tactic/Simps/Basic.lean,Mathlib/Tactic/Simps/NotationClass.lean,MathlibTest/Simps.lean,MathlibTest/TacticCheckInstancesSimps.lean |
19 |
3 |
['github-actions', 'joneugster'] |
nobody |
15-5818 15 days ago |
18-3100 18 days ago |
18-3148 18 days |
| 38200 |
Parcly-Taxel author:Parcly-Taxel |
feat: Turán numbers and their strict monotonicity |
`strictMonoOn_turanNumber` was initially proved by @Aristotle-Harmonic, then hand-polished.
Co-authored-by: Aristotle (Harmonic) <aristotle-harmonic@harmonic.fun> |
t-combinatorics
tech debt
maintainer-merge
|
45/20 |
Mathlib/Combinatorics/SimpleGraph/Extremal/Turan.lean |
1 |
9 |
['Parcly-Taxel', 'YaelDillies', 'github-actions', 'mathlib-merge-conflicts', 'tb65536'] |
nobody |
14-36922 14 days ago |
14-37558 14 days ago |
108-13239 108 days |
| 37685 |
vihdzp author:vihdzp |
feat: Fodor's lemma |
We define stationary sets and prove Fodor's lemma, following the proof at Wikipedia.
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- [x] depends on: #39727
I'm surprised that this has a [Wikipedia article](https://en.wikipedia.org/wiki/Fodor%27s_lemma) but isn't listed in 1000.yaml. Is it just because the name has "lemma" instead of "theorem"?
[](https://gitpod.io/from-referrer/)
|
t-set-theory
t-order
large-import
maintainer-merge
|
70/3 |
Mathlib/SetTheory/Cardinal/Cofinality/Club.lean,Mathlib/SetTheory/Ordinal/Basic.lean |
2 |
16 |
['YaelDillies', 'github-actions', 'mathlib-dependent-issues', 'mathlib-merge-conflicts', 'staroperator', 'vihdzp'] |
nobody |
14-36869 14 days ago |
15-34029 15 days ago |
15-68863 15 days |
| 38227 |
vihdzp author:vihdzp |
chore(Algebra/Order/Monoid/Unbundled/Basic): golfing + formatting |
We make use of `variable`, fix some weird spacing, and golf many proofs.
The only breaking change is that `mul_lt_iff_lt_one_left'`/`add_lt_iff_neg_left` now takes an explicit argument, matching the theorems surrounding it.
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Not too fond of the `calc` tactic.
[](https://gitpod.io/from-referrer/)
|
t-algebra
t-order
maintainer-merge
label:t-algebra$ |
233/501 |
Mathlib/Algebra/Order/Archimedean/Real/Basic.lean,Mathlib/Algebra/Order/Monoid/Unbundled/Basic.lean |
2 |
9 |
['YaelDillies', 'github-actions', 'mathlib-merge-conflicts', 'vihdzp'] |
nobody |
14-35626 14 days ago |
14-73970 14 days ago |
39-80405 39 days |
| 41965 |
bryangingechen author:bryangingechen |
ci: retire legacy zulip emoji workflows, enable emojis on mathlib4-nightly-testing |
This PR replaces our existing zulip emoji reaction workflows with new triggers in the new "reconciliation" workflow (`zulip_emoji_reconcile.yml`) added in #41852.
Deleted workflows:
- `zulip_emoji_ci_status.yaml`: handles CI status reactions. Replaced with `workflow_run` trigger.
- `zulip_emoji_closed_pr.yaml`: handles reactions for closed / reopened PRs. Replaced with `pull_request_target` `closed` and `reopened` triggers.
- `zulip_emoji_labelling.yaml`: handles reactions for awaiting-author and maintainer-merge labels. Replaced with `pull_request_target` `labeled` and `unlabeled` triggers.
- `zulip_emoji_merge_delegate.yaml`: handles reactions for PRs merged into `master`. Replaced with `pull_request_target` `closed` and `reopened` triggers.
The Zulip reaction steps have also been removed from `maintainer_bors_wf_run.yml` which now just handles labels: that label event then triggers the reconciliation workflow rather than handling the reactions on its own.
This PR also adds and wires in a configuration file for `mathlib4-nightly-testing` so that reactions for `nightly#XXX` PRs are also managed.
Prepared with Claude code.
---
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[](https://gitpod.io/from-referrer/)
|
CI
LLM-generated
file-removed
maintainer-merge
|
159/348 |
.github/workflows/maintainer_bors_wf_run.yml,.github/workflows/zulip_emoji_ci_status.yaml,.github/workflows/zulip_emoji_closed_pr.yaml,.github/workflows/zulip_emoji_labelling.yaml,.github/workflows/zulip_emoji_merge_delegate.yaml,.github/workflows/zulip_emoji_reconcile.yml,.github/zulip-emoji-config-nightly.json,docs/workflows.md |
8 |
3 |
['github-actions', 'joneugster'] |
joneugster assignee:joneugster |
14-5732 14 days ago |
18-43929 18 days ago |
18-43705 18 days |
| 40389 |
YaelDillies author:YaelDillies |
feat(MeasureTheory): the average of a sum of functions |
and other basic lemmas about `average`
From MeanFourier
---
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|
t-measure-probability
maintainer-merge
|
88/24 |
Mathlib/Analysis/Convex/Integral.lean,Mathlib/MeasureTheory/Integral/Average.lean |
2 |
7 |
['EtienneC30', 'YaelDillies', 'github-actions'] |
nobody |
13-52589 13 days ago |
59-29838 59 days ago |
59-46616 59 days |
| 42205 |
grunweg author:grunweg |
chore(Geometry/Manifold): avoid some underscore soup |
---
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|
t-differential-geometry
maintainer-merge
|
13/9 |
Mathlib/Geometry/Manifold/ContMDiff/Basic.lean,Mathlib/Geometry/Manifold/HasGroupoid.lean,Mathlib/Geometry/Manifold/IsManifold/Basic.lean |
3 |
16 |
['JovanGerb', 'felixpernegger', 'github-actions', 'grunweg'] |
nobody |
9-85824 9 days ago |
10-65242 10 days ago |
10-65018 10 days |
| 42202 |
j-loreaux author:j-loreaux |
feat: define `PositiveContinuousLinearMap` |
This PR defines the continuous version of `PositiveLinearMap` via `extend`ing this structure as well as `ContinuousLinearMap`. In the process, we also create `Is{Add,Zero,SMul}Apply` instances for `PositiveLinearMap`.
---
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|
t-topology
maintainer-merge
|
269/16 |
Mathlib.lean,Mathlib/Algebra/Order/Module/PositiveLinearMap.lean,Mathlib/Topology/Algebra/Module/ContinuousLinearMap/Positive.lean |
3 |
28 |
['github-actions', 'j-loreaux', 'mcdoll', 'themathqueen'] |
nobody |
9-72790 9 days ago |
9-73611 9 days ago |
9-82272 9 days |
| 41923 |
themathqueen author:themathqueen |
feat(Algebra): `IsUnital` and `IsNotUnital` classes |
This adds Prop-type classes on multiplicative types that state whether a unit exists or not. This shouldn't really be used unless it is the only reasonable way to phrase or prove a statement.
---
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This will be used in #36327.
Zulip thread: [#mathlib4 > `IsUnital` class](#narrow/channel/287929-mathlib4/topic/.60IsUnital.60.20class)
[](https://gitpod.io/from-referrer/)
|
t-algebra
maintainer-merge
label:t-algebra$ |
183/0 |
Mathlib/Algebra/Algebra/Defs.lean,Mathlib/Algebra/Group/Defs.lean,Mathlib/Algebra/Ring/Defs.lean,Mathlib/Analysis/CStarAlgebra/Classes.lean,Mathlib/Analysis/Normed/Module/Basic.lean,Mathlib/Analysis/Normed/Ring/Basic.lean |
6 |
13 |
['SnirBroshi', 'github-actions', 'j-loreaux', 'themathqueen'] |
nobody |
9-47099 9 days ago |
9-77243 9 days ago |
19-54097 19 days |
| 41757 |
wwylele author:wwylele |
doc: add theorem 8 (straightedge-and-compass construction) to 100.yaml |
Adding my repo as an external proof to the theorems.
---
A hard part of these theorems is verifying the definition and the statement. I have extracted the relevant definition in the [Challenge.lean file](https://github.com/wwylele/Compass/blob/master/Challenge.lean) for review. This is also verifiable using comparator. I followed [wikipedia](https://en.wikipedia.org/wiki/Straightedge_and_compass_construction#The_basic_constructions) for the definition of constructibility
Zulip thread: [#general > The impossibility of trisecting the angle](https://leanprover.zulipchat.com/#narrow/channel/113488-general/topic/The.20impossibility.20of.20trisecting.20the.20angle/with/610005158) (there is discussion about whether this definition allows "picking an arbitrary point")
I plan to upstream some or all of the project, but I anticipate it to be a long process, and it is not clear to me whether the entire project is within the scope of Mathlib, which is why I am only adding a link to the repo for now
AI usage disclosure: [this 63 lines](https://github.com/wwylele/Compass/blob/1352a83753052bc9a069b52aced81785dccb0aba/Compass/ConstructibleNumber.lean#L45-L111) were generated by Aristotle. The rest were written by me.
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|
documentation
maintainer-merge
|
3/0 |
docs/100.yaml |
1 |
4 |
['github-actions', 'joneugster'] |
joneugster assignee:joneugster |
8-25199 8 days ago |
24-66991 24 days ago |
24-66767 24 days |
| 41487 |
Deicyde author:Deicyde |
feat: implement pi-base cross-reference attribute |
Adds a `@[pibase ID]` cross-reference attribute for canonical pi-base identifiers.
The parser accepts IDs of the form `P000001`, `S000023`, and `T000001`, and routes them to the corresponding `properties/`, `spaces/`, or `theorems/` page on `topology.pi-base.org`.
Tests cover docstring insertion, `#pibase_tags`, all three URL routes, and malformed IDs.
This PR was prepared with assistance from Codex. Based heavily on #41290 |
t-meta
LLM-generated
maintainer-merge
awaiting-author
|
149/8 |
Mathlib/Tactic/CrossRefAttribute.lean,MathlibTest/CrossRefAttribute.lean |
2 |
28 |
['Deicyde', 'adomani', 'github-actions', 'joneugster', 'mathlib-merge-conflicts', 'thorimur', 'vlad902'] |
adomani and thorimur assignee:adomani assignee:thorimur |
8-24652 8 days ago |
12-9538 12 days ago |
12-6734 12 days |
| 41938 |
rosborn author:rosborn |
chore(Linter/DirectoryDependency): move forbidden directories into a JSON file |
Co-authored-by: Michael Rothgang <rothgang@math.uni-bonn.de>
---
This PR adopts the work from #26088 and #26406.
The JSON file was generated programmatically from the previous hard-coded array and verified to produce an identical relation, with one deliberate exception: the entry ``(`MathlibTest.Header, `Mathlib.Deprecated)`` was dropped.
If this looks good, I can continue work on `allowedImportDirs` and `overrideAllowedImportDirs`.
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|
t-linter
maintainer-merge
|
407/313 |
Mathlib/Tactic/Linter/DirectoryDependency.lean,scripts/README.md,scripts/forbiddenDirs.json |
3 |
14 |
['github-actions', 'grunweg', 'joneugster', 'rosborn'] |
grunweg and joneugster assignee:joneugster assignee:grunweg |
8-23852 8 days ago |
10-49645 10 days ago |
14-71042 14 days |
| 39696 |
jsm28 author:jsm28 |
refactor(LinearAlgebra/Orientation,LinearAlgebra/AffineSpace/FiniteDimensional): instances for arbitrary orientations |
Based on suggestions by @kim-em on Zulip https://leanprover.zulipchat.com/#narrow/channel/144837-PR-reviews/topic/PRs.20towards.20IMO.20geometry.202024.20P4/near/596946072 add convenience scoped instances for choosing an arbitrary orientation of a module, and for the `finrank` of the span of the vertices of a simplex.
Note: I don't understand why the latter scoped instance is only found automatically in one of the two places using it; in `Sphere/Power.lean` it's necessary to use `Affine.Simplex.fact_finrank_direction_affineSpan_eq` rather than relying on typeclass inference, but in `Angle/Sphere.lean` typeclass inference suffices.
---
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|
t-algebra
t-euclidean-geometry
maintainer-merge
label:t-algebra$ |
26/23 |
Archive/Imo/Imo2019Q2.lean,Mathlib/Geometry/Euclidean/Angle/Sphere.lean,Mathlib/Geometry/Euclidean/Sphere/Power.lean,Mathlib/LinearAlgebra/AffineSpace/FiniteDimensional.lean,Mathlib/LinearAlgebra/Orientation.lean |
5 |
9 |
['YaelDillies', 'github-actions', 'jsm28', 'mathlib-merge-conflicts'] |
eric-wieser assignee:eric-wieser |
8-21016 8 days ago |
8-21685 8 days ago |
77-86137 77 days |
| 33664 |
ooovi author:ooovi |
feat(Geometry/Convex/Cone/Pointed): face lattice of pointed cones |
- Define PointedCone.IsFaceOf, for a pointed cone being a face of another pointed cone.
- Prove some basic properties, that faces are extreme sets of their cone, and how they behave under intersection, map and product operations.
- Define `Face` by bundling the `IsFaceOf` structure, and show the complete lattice structure on it.
- Prove that taking the product of two faces is an order isomorphism.
Co-authored-by: Martin Winter
---
- [x] depends on: #33780 for the definition of the lineal space
- [x] depends on: #39185 for `isFaceOf`
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|
t-convex-geometry
maintainer-merge
|
202/0 |
Mathlib.lean,Mathlib/Geometry/Convex/Cone/Face/Lattice.lean |
2 |
205 |
['YaelDillies', 'eric-wieser', 'github-actions', 'martinwintermath', 'mathlib-dependent-issues', 'mathlib4-merge-conflict-bot', 'ooovi', 'vihdzp'] |
nobody |
8-13032 8 days ago |
19-21354 19 days ago |
25-16099 25 days |
| 41814 |
JovanGerb author:JovanGerb |
fix(CategoryTheory/Limits/VanKampen): backport fix for lean#8883 |
This PR contains the fix that I had to make to get https://github.com/leanprover/lean4/pull/8883 working. When looking into this, I had concluded that the original proof should not have worked in the first place.
This was the only such failure that was present in mathlib.
I think having this fix will be helpful when work on the unification performance issue is resumed.
---
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|
t-category-theory
maintainer-merge
|
1/1 |
Mathlib/CategoryTheory/Limits/VanKampen.lean |
1 |
3 |
['github-actions', 'grunweg'] |
nobody |
8-12164 8 days ago |
23-10507 23 days ago |
23-10283 23 days |
| 42281 |
grunweg author:grunweg |
chore: tweak API for modelWithCornersEuclideanHalfSpace |
- un-simp `modelWithCornersEuclideanHalfSpace_toFun`: in applications, this is not always the change you want to make.
- instead, add an _apply lemma (and make that simp); that's much better
- add `modelWithCornersEuclideanHalfSpace_symm_apply_of_le`, a more useful version of `modelWithCornersEuclideanHalfSpace_symm_apply`. It cannot be used to golf proofs easily, but it's a *much* more useful rewrite lemma.
- add analogous lemmas for `modelWithCornersEuclideanQuadrant`
Inspired by questions arising in `scholzhannah`'s master's thesis.
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t-differential-geometry
maintainer-merge
|
23/1 |
Mathlib/Geometry/Manifold/Instances/Real.lean |
1 |
10 |
['github-actions', 'grunweg', 'scholzhannah'] |
scholzhannah assignee:scholzhannah |
7-85938 7 days ago |
8-10203 8 days ago |
9-6763 9 days |
| 40925 |
JovanGerb author:JovanGerb |
chore(CategoryTheory/Functor/Category): don't expose `NatTrans.hcomp` |
This PR hides the definition of `NatTrans.hcomp`, because it has two equally sensible possible definitions. As a result, we can get rid of the `to_dual_insert_cast`. `simps` doesn't work for non-exposed definition, so `hcomp_app` is proved separately, and its dual `hcomp_app'` is added.
Note: some proofs break, because the `dsimp` set changes, due to the definition not being exposed. This is a bit unfortunate. There was some discussion on Zulip about changing `dsimp` for category theory into a simp set, which would fix this problem, because we could then add `hcomp_app` to this set.
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maintainer-merge
tech debt
|
31/17 |
Mathlib/Algebra/Homology/HomologicalComplex.lean,Mathlib/AlgebraicTopology/DoldKan/NCompGamma.lean,Mathlib/AlgebraicTopology/DoldKan/PInfty.lean,Mathlib/CategoryTheory/Functor/Category.lean,Mathlib/CategoryTheory/Monoidal/Action/End.lean,Mathlib/CategoryTheory/Monoidal/End.lean,Mathlib/CategoryTheory/Triangulated/TStructure/SpectralObject.lean,Mathlib/CategoryTheory/Types/Basic.lean |
8 |
20 |
['JovanGerb', 'github-actions', 'grunweg', 'leanprover-radar', 'mathlib-merge-conflicts', 'riccardobrasca'] |
nobody |
7-64396 7 days ago |
7-65360 7 days ago |
45-34434 45 days |
| 41194 |
RemyDegenne author:RemyDegenne |
feat: define `riskIncrease` (statistical information) |
This PR adds a measure of the information in a statistical experiment: the increase of risk that follows from discarding the result of the experiment.
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|
t-measure-probability
maintainer-merge
|
139/0 |
Mathlib.lean,Mathlib/Probability/Decision/RiskIncrease.lean,docs/references.bib |
3 |
5 |
['EtienneC30', 'github-actions'] |
EtienneC30 assignee:EtienneC30 |
7-24053 7 days ago |
2-24159 2 days ago |
36-72941 36 days |
| 38214 |
emlis42 author:emlis42 |
feat(Algebra/ContinuedFractions): add Euler's continued fraction |
This PR formalizes Euler continued fractions by providing `euler` which construct one by giving head term and coefficients with some basic property.
We also introduce a transformation `GenContFract.toEuler` that maps a generalized continued fraction `g : GenContFract K` to an equivalent Euler continued fraction. |
new-contributor
t-algebra
maintainer-merge
label:t-algebra$ |
364/0 |
Mathlib.lean,Mathlib/Algebra/ContinuedFractions/Euler.lean |
2 |
74 |
['YaelDillies', 'emlis42', 'github-actions', 'mathlib-bors', 'wwylele'] |
nobody |
6-76335 6 days ago |
6-76894 6 days ago |
94-45163 94 days |
| 41529 |
kebekus author:kebekus |
feat: Émile Borel's classic "Growth Lemma" |
Establish Émile Borel's classic **Growth Lemma**: if `S : ℝ → ℝ` is monotone on `Set.Ici a` and satisfies `1 ≤ S` there, then
`∀ᶠ r in volume.cofinite ⊓ atTop, S (r + (S r)⁻¹) ≤ 2 * S r`.
In other words: The inequality `S (r + (S r)⁻¹) ≤ 2 * S r` holds for all sufficiently large `r` outside an exceptional set `E` of finite Lebesgue measure. In Value Distribution Theory, this statement is central to the proof of the "Lemma on the Logarithmic Derivatives".
This material is used in [Project VD](https://github.com/kebekus/ProjectVD), formalizing Value Distribution Theory for meromorphic functions on the complex plane. Claude Code was used to create this PR.
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t-measure-probability
LLM-generated
maintainer-merge
|
142/0 |
Mathlib.lean,Mathlib/MeasureTheory/Function/BorelGrowth.lean,docs/references.bib |
3 |
7 |
['EtienneC30', 'github-actions', 'kebekus'] |
EtienneC30 assignee:EtienneC30 |
6-72741 6 days ago |
6-75133 6 days ago |
29-70684 29 days |
| 40613 |
LLaurance author:LLaurance |
feat(Probability): expectation of a binomial random variable |
---
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t-measure-probability
maintainer-merge
|
16/1 |
Mathlib/Probability/Distributions/Binomial.lean |
1 |
3 |
['EtienneC30', 'github-actions'] |
nobody |
5-52587 5 days ago |
54-41722 54 days ago |
54-41498 54 days |
| 40788 |
FrankieNC author:FrankieNC |
feat: uniformly integrable Lᵖ tails tend to 0 uniformly |
Adds `UniformIntegrable.tendsto_iSup_eLpNorm_indicator_atTop`: for a uniformly
integrable family `f`,
Tendsto (fun M ↦ ⨆ i, eLpNorm ({x | M ≤ ‖f i x‖₊}.indicator (f i)) p μ) atTop (𝓝 0).
This is the `Tendsto` companion to the existing `UniformIntegrable.spec`, which only
provides, for each `ε`, a single threshold `C`.
This is the form that arises when truncating an L¹/Lᵖ family at increasing norm
levels — e.g. vector-valued truncation / Komlós-type arguments — where the existing
ProbabilityTheory.truncation does not apply, being real- and order-interval-valued.
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|
t-measure-probability
brownian
maintainer-merge
|
113/5 |
Mathlib/MeasureTheory/Function/UniformIntegrable.lean |
1 |
22 |
['CoolRmal', 'EtienneC30', 'FrankieNC', 'github-actions'] |
EtienneC30 assignee:EtienneC30 |
5-15728 5 days ago |
5-21243 5 days ago |
49-62368 49 days |
| 41799 |
FrankieNC author:FrankieNC |
feat(Topology/MetricSpace): differentiable maps do not increase Hausdorff dimension |
Add the Luzin N property of differentiable maps and deduce that differentiable maps do not increase Hausdorff dimension, over any nontrivially normed field with no finite-dimensionality or separability assumptions:
- `MeasureTheory.Measure.isSeparable_of_hausdorffMeasure_ne_top`: a set with `μH[d] s ≠ ∞` is separable
- `DifferentiableOn.hausdorffMeasure_image_eq_zero`: if `f` is differentiable on `t` and `μH[d] t = 0` for some `0 ≤ d`, then `μH[d] (f '' t) = 0`
- `DifferentiableOn.dimH_image_le`: `dimH (f '' t) ≤ dimH t`, as a corollary of the Luzin N property
- `Differentiable.dimH_range_le`, `DifferentiableOn.dense_compl_image_of_dimH_lt_finrank`, `Differentiable.dense_compl_range_of_finrank_lt_finrank`: differentiable versions of the Sard-type corollaries; `dense_compl_of_dimH_lt_finrank` and these corollaries also drop `FiniteDimensional` instance assumptions that already follow from their hypotheses
This resolves the TODO on `ContDiffOn.dimH_image_le`: the `Convex ℝ s` hypothesis is not needed. The four `ContDiff`/`ContDiffOn` lemmas (`ContDiffOn.dimH_image_le`, `ContDiff.dimH_range_le`, `ContDiffOn.dense_compl_image_of_dimH_lt_finrank`, `ContDiff.dense_compl_range_of_finrank_lt_finrank`) are deprecated in favour of the `Differentiable` versions. |
t-topology
maintainer-merge
|
103/28 |
Mathlib/MeasureTheory/Measure/Hausdorff.lean,Mathlib/Topology/MetricSpace/HausdorffDimension.lean |
2 |
18 |
['CoolRmal', 'FrankieNC', 'github-actions'] |
CoolRmal assignee:CoolRmal |
4-52824 4 days ago |
5-17406 5 days ago |
22-52514 22 days |
| 41656 |
joelriou author:joelriou |
feat(AlgebraicTopology): order relation between simplices of the nerve of a partial order |
This is applied to the characterization of the order relation between simplices of `Δ[p] ⊗ Δ[q]`.
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t-algebraic-topology
maintainer-merge
|
64/2 |
Mathlib/AlgebraicTopology/SimplicialSet/NerveNondegenerate.lean,Mathlib/AlgebraicTopology/SimplicialSet/ProdStdSimplex.lean,Mathlib/AlgebraicTopology/SimplicialSet/Subcomplex.lean |
3 |
6 |
['github-actions', 'joelriou', 'robin-carlier'] |
nobody |
4-33919 4 days ago |
23-12873 23 days ago |
26-27876 26 days |
| 42418 |
FrankieNC author:FrankieNC |
chore(Data/Finset/Prod): state `singleton_product`/`product_singleton` via `sectR`/`sectL` |
The embeddings in the statements of `Finset.singleton_product` and `Finset.product_singleton` are `Function.Embedding.sectR`/`sectL` written out as anonymous constructors. Restate them via the named embeddings (the statements are definitionally unchanged), so call sites can rewrite with the `sectR_apply`/`sectL_apply` simp lemmas instead of `Embedding.coeFn_mk`. Update the two call sites that did the latter, and golf `singleton_product_singleton`, which is now `rfl`.
Preparation for a follow-up PR replacing the `aesop` proofs of the `{Icc,Ico,Ioc,Ioo,uIcc}_map_{sectL,sectR}` lemmas in `Order/Interval/Finset/Basic`.
|
t-topology
easy
maintainer-merge
|
5/8 |
Mathlib/Analysis/Fourier/FourierTransformDeriv.lean,Mathlib/Data/Finset/Prod.lean,Mathlib/Topology/EMetricSpace/PairReduction.lean |
3 |
2 |
['github-actions', 'grunweg'] |
nobody |
4-24985 4 days ago |
4-57719 4 days ago |
4-57495 4 days |
| 41498 |
pepamontero author:pepamontero |
feat(Analysis/SpecificLimits/Normed): the sum ∑' n, n ^ k * r ^ n via Stirling numbers |
For `‖r‖ < 1`, compute `∑' n : ℕ, n ^ k * r ^ n` as the finite sum `∑ j ∈ range (k + 1), S(k, j) * j ! * r ^ j / (1 - r) ^ (j + 1)`, where `S(k, j)` are the Stirling numbers of the second kind.
**Motivation:** a special case of `tsum_sq_mul_geometric_of_norm_lt_one` over `ℂ` was proved in the FLT project and is generalized here to match the surrounding Mathlib API; the private FLT lemma can then be replaced by this one.
**Main additions to `Normed.lean`:**
- The general power formula:
- `hasSum_pow_mul_geometric_of_norm_lt_one'` / `tsum_pow_mul_geometric_of_norm_lt_one'`: for `‖r‖ < 1` in a general ring, `∑' n, n ^ k * r ^ n = ∑ j ∈ range (k + 1), S(k, j) * j ! * r ^ j * ((1 - r)⁻¹ʳ) ^ (j + 1)`.
- `hasSum_pow_mul_geometric_of_norm_lt_one` / `tsum_pow_mul_geometric_of_norm_lt_one`: the same in a field, with `/ (1 - r) ^ (j + 1)`.
- The `descFactorial` special case that supplies each term of that sum:
- `hasSum_descFactorial_mul_geometric_of_norm_lt_one'` / `tsum_descFactorial_mul_geometric_of_norm_lt_one'`: for `‖r‖ < 1` in a general ring, `∑' n, n.descFactorial j * r ^ n = j ! * r ^ j * ((1 - r)⁻¹ʳ) ^ (j + 1)`.
- `hasSum_descFactorial_mul_geometric_of_norm_lt_one` / `tsum_descFactorial_mul_geometric_of_norm_lt_one`: the field versions, with `/ (1 - r) ^ (j + 1)`.
**Additions to other files:**
- `Combinatorics/Enumerative/Stirling.lean`: `Nat.pow_eq_sum_stirlingSecond_mul_descFactorial`, expressing every power `n ^ k` as a linear combination `n ^ k = ∑ j ∈ range (k + 1), stirlingSecond k j * n.descFactorial j`.
- `Data/Nat/Factorial/Basic.lean`: `Nat.descFactorial_mul_self`, the identity `n.descFactorial j * n = n.descFactorial (j + 1) + j * n.descFactorial j`, used in the induction proving the Stirling result above.
**Other changes:**
- `summable_pow_mul_geometric_of_norm_lt_one` (statement unchanged) is now a one-line consequence of the general formula; its previous proof via `ascPochhammer` is deleted, so the `RingTheory.Polynomial.Pochhammer` import is no longer needed.
- The statement of `summable_descFactorial_mul_geometric_of_norm_lt_one` changes from the shifted summand `(n + k).descFactorial k * r ^ n` to `n.descFactorial k * r ^ n`, to match the new `hasSum`/`tsum` lemmas. It had no other uses in Mathlib, and the shifted form is recoverable in one line from `summable_choose_mul_geometric_of_norm_lt_one`.
- The proof of `hasSum_coe_mul_geometric_of_norm_lt_one'` (`k = 1`) is simplified using the general formula, and the `k = 2` case is added: `∑' n, n ^ 2 * r ^ n = r * (1 + r) / (1 - r) ^ 3` (`hasSum_sq_mul_geometric_of_norm_lt_one'` and the three companion lemmas).
- The redundant imports mentioned above have now been removed; this required import edits in 8 dependent files that had relied on them transitively.
**AI Disclosure**: this code originated in the FLT project, where an initial version was written by William Coram and Samuel Yin with AI assistance (Claude, later cleaned up with Codex). It has since been substantially rewritten for this PR; little of the original generated code remains.
Co-authored-by: Malhar A. Patel <142735852+Mal-Pat@users.noreply.github.com>
Co-authored-by: William Coram
Co-authored-by: Samuel Yin
---
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|
new-contributor
large-import
t-analysis
maintainer-merge
|
195/83 |
Mathlib/Analysis/Calculus/ContDiff/Defs.lean,Mathlib/Analysis/SpecialFunctions/OrdinaryHypergeometric.lean,Mathlib/Analysis/SpecialFunctions/Pochhammer.lean,Mathlib/Analysis/SpecialFunctions/PolynomialExp.lean,Mathlib/Analysis/SpecialFunctions/Pow/Deriv.lean,Mathlib/Analysis/SpecialFunctions/Trigonometric/Basic.lean,Mathlib/Analysis/SpecificLimits/Normed.lean,Mathlib/Combinatorics/Enumerative/Stirling.lean,Mathlib/Data/Nat/Factorial/Basic.lean,Mathlib/InformationTheory/Coding/KraftMcMillan.lean,Mathlib/Topology/Instances/CantorSet.lean |
11 |
34 |
['Mal-Pat', 'YaelDillies', 'github-actions', 'grunweg', 'pepamontero'] |
nobody |
4-17066 4 days ago |
22-68504 22 days ago |
28-4830 28 days |
| 42415 |
j-loreaux author:j-loreaux |
feat: generalize type class assumptions for `PositiveLinearMap.preGNS` and prove the Cauchy-Schwarz lemma |
In particular, we show:
```lean
lemma norm_map_star_mul_le (f : A →ₚ[ℂ] ℂ) (x y : A) :
‖f (star x * y)‖ ≤ √‖f (star x * x)‖ * √‖f (star y * y)‖
```
for `A` a non-unital star-ordered `ℂ`-algebra (and we create an alias `cauchy_schwarz_star_mul` for discoverability). The generalization away from C⋆-algebras allows this material to be used for type synonyms of C⋆-algebras with alternative topologies.
---
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|
t-analysis
maintainer-merge
|
48/3 |
Mathlib/Analysis/CStarAlgebra/GelfandNaimarkSegal.lean |
1 |
9 |
['github-actions', 'j-loreaux', 'themathqueen'] |
nobody |
3-83040 3 days ago |
4-1302 4 days ago |
4-62750 4 days |
| 42156 |
tb65536 author:tb65536 |
doc(Algebra/Module/ZLattice/Basic): fix `ZLattice.comap` docstring |
The linear map in the `ZLattice.comap` docstring was the wrong way around.
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|
t-ring-theory
t-algebra
documentation
easy
maintainer-merge
label:t-algebra$ |
5/5 |
Mathlib/Algebra/Module/ZLattice/Basic.lean |
1 |
3 |
['github-actions', 'joneugster', 'plp127'] |
joneugster assignee:joneugster |
3-82045 3 days ago |
11-69188 11 days ago |
11-68966 11 days |
| 41503 |
JovanGerb author:JovanGerb |
feat(GRewrite): support strict rewriting in `>`/`≥` |
This PR adds `gcongr strict` tags in order to support strict rewriting in `≥`/`>`. Previously this only worked in `≤`/`<`.
---
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|
t-meta
maintainer-merge
|
9/0 |
Mathlib/Order/Basic.lean,MathlibTest/Tactic/GRewrite.lean |
2 |
4 |
['JovanGerb', 'github-actions', 'grunweg'] |
nobody |
3-80660 3 days ago |
31-411 31 days ago |
31-187 31 days |
| 38664 |
joelriou author:joelriou |
feat(AlgebraicTopology/SimplicialSet): more API for `SSet.op` |
---
- [x] depends on: #38662
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|
t-algebraic-topology
tech debt
maintainer-merge
|
136/36 |
Mathlib/AlgebraicTopology/SimplexCategory/Rev.lean,Mathlib/AlgebraicTopology/SimplicialObject/Op.lean,Mathlib/AlgebraicTopology/SimplicialSet/KanComplex/MulStruct.lean,Mathlib/AlgebraicTopology/SimplicialSet/Op.lean,Mathlib/AlgebraicTopology/SimplicialSet/StdSimplex.lean |
5 |
18 |
['github-actions', 'joelriou', 'mathlib-dependent-issues', 'mathlib-merge-conflicts', 'robin-carlier'] |
dagurtomas assignee:dagurtomas |
3-72258 3 days ago |
3-73474 3 days ago |
42-81530 42 days |
| 42266 |
menon-codes author:menon-codes |
refactor: making trans usage explicit with kerLift |
Slightly simplifies the argument used in `exists_integral_inj_algHom_of_quotient` for clarity.
This is also needed to fix a small edge case present in a linter I am making as discussed here: [#mathlib4 > Linter for ellipsis @ 💬](https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/Linter.20for.20ellipsis/near/613523943) |
t-ring-theory
new-contributor
maintainer-merge
|
2/5 |
Mathlib/RingTheory/NoetherNormalization.lean |
1 |
8 |
['copilot-pull-request-reviewer', 'github-actions', 'grunweg', 'menon-codes'] |
nobody |
3-69843 3 days ago |
4-1576 4 days ago |
9-43858 9 days |
| 42270 |
JovanGerb author:JovanGerb |
chore: remove more backward options that are blocking `scripts/rm_set_option.py` |
This PR removes some backward options that can be removed, but in doing so trigger the unused simp arguments linter.
See also [Zulip](https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/4.2E33.2E0-rc1.20Multiple.20.60respectTransparency.60-related.20issues/near/613533366)
---
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|
tech debt
maintainer-merge
merge-conflict
|
13/31 |
Mathlib/Algebra/Category/Grp/Colimits.lean,Mathlib/Algebra/Homology/Opposite.lean,Mathlib/Condensed/Discrete/LocallyConstant.lean,Mathlib/MeasureTheory/VectorMeasure/Integral.lean,Mathlib/Probability/Kernel/Disintegration/MeasurableStieltjes.lean,Mathlib/RingTheory/LaurentSeries.lean,Mathlib/RingTheory/Valuation/Basic.lean,Mathlib/Topology/Category/TopCat/Limits/Products.lean |
8 |
3 |
['github-actions', 'grunweg', 'mathlib-merge-conflicts'] |
nobody |
3-56693 3 days ago |
3-56693 3 days ago |
6-2652 6 days |
| 42341 |
gaetanserre author:gaetanserre |
feat(Kernel/Deterministic): any deterministic kernel is s-finite |
Any deterministic kernel is s-finite.
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|
t-measure-probability
maintainer-merge
|
11/0 |
Mathlib/Probability/Kernel/Deterministic.lean |
1 |
7 |
['CoolRmal', 'github-actions'] |
CoolRmal assignee:CoolRmal |
3-56059 3 days ago |
3-56059 3 days ago |
6-15827 6 days |
| 40812 |
karlesmarin author:karlesmarin |
feat(RingTheory/HopfAlgebra): antipode is the unique convolution inverse of the identity |
Adds `HopfAlgebra.eq_antipode_of_convMul_id_eq_one` and `HopfAlgebra.eq_antipode_of_id_convMul_eq_one`: an `R`-linear map that is a one-sided convolution inverse of the identity equals the antipode. Either side suffices.
The proof is `left_inv_eq_right_inv` in the convolution monoid `WithConv (A →ₗ[R] A)` together with the two antipode axioms, transported by `toConv_injective`. It closes the "uniqueness of Hopf algebra structure on a bialgebra" TODO in this file, and is the uniqueness companion to the existing `ofConvInverse` (existence).
---
**AI disclosure.** This contribution was written with AI assistance (Claude, used as a coding assistant). I have reviewed and understand the proof and can justify the design. The result is classical; the contribution is its Lean formalization.
|
t-ring-theory
new-contributor
LLM-generated
maintainer-merge
|
17/3 |
Mathlib/RingTheory/HopfAlgebra/Basic.lean,Mathlib/RingTheory/HopfAlgebra/Convolution.lean |
2 |
24 |
['YaelDillies', 'github-actions', 'hawkrobe', 'karlesmarin', 'themathqueen'] |
nobody |
3-18531 3 days ago |
3-18555 3 days ago |
39-22282 39 days |
| 42477 |
Multramate author:Multramate |
feat(NumberTheory/EllipticDivisibilitySequence): add some lemmas and grind some proofs |
Also rename `odd` to `neg` because `odd` will be reserved for odd elliptic relations.
---
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|
t-number-theory
t-algebra
maintainer-merge
label:t-algebra$ |
95/53 |
Mathlib/Data/Nat/DvdSequence.lean,Mathlib/NumberTheory/EllipticDivisibilitySequence.lean |
2 |
5 |
['Multramate', 'github-actions', 'tb65536'] |
nobody |
3-5783 3 days ago |
3-9933 3 days ago |
3-9709 3 days |
| 41244 |
joelriou author:joelriou |
chore(CategoryTheory/Adjunction/AdjointFunctorTheorems): generalize universes |
For theorems involving a category `C : Type u` (with `Category.{v} C`), the smallness assumptions or the existence of limits/colimits are expressed relative to an arbitrary universe `w` (instead of `w = v`), provided the assumption `LocallySmall.{w} C` is added. (This makes this more coherent with the API about locally presentable/accessible categories.)
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|
t-category-theory
maintainer-merge
|
71/36 |
Mathlib/CategoryTheory/Adjunction/AdjointFunctorTheorems.lean,Mathlib/CategoryTheory/Comma/StructuredArrow/Small.lean,Mathlib/CategoryTheory/Limits/Constructions/WeaklyInitial.lean,Mathlib/CategoryTheory/Limits/Shapes/WideEqualizers.lean |
4 |
7 |
['github-actions', 'robin-carlier', 'smorel394'] |
robin-carlier assignee:robin-carlier |
2-83129 2 days ago |
34-69702 34 days ago |
37-61326 37 days |
| 41514 |
teorth author:teorth |
feat(Topology/MetricSpace/Heine-Cantor): metric ε-δ forms of Heine–Cantor |
Add (pseudo-)metric space (or "epsilon-delta") versions of many of the versions of the Heine-Cantor theorem (continuous functions on compacta are uniformly continuous) from `Topology.UniformSpace.HeineCantor` into a new file
`Topology.Metric.HeineCantor`. As per reviewer feedback, EMetric variants are also provided at `Topology.EMetric.HeineCantor`.
---
New files needed to be created because many files downstream of `Topology.UniformSpace.HeineCantor` blocked the use of `UniformOnFun`.
AI assistance was used to expand a small initial set of human-generated lemmas into a larger set, with the latter then reviewed by both an AI tool and myself.
[](https://gitpod.io/from-referrer/)
|
t-topology
maintainer-merge
|
161/0 |
Mathlib.lean,Mathlib/Topology/EMetricSpace/Defs.lean,Mathlib/Topology/EMetricSpace/HeineCantor.lean,Mathlib/Topology/MetricSpace/HeineCantor.lean |
4 |
14 |
['felixpernegger', 'github-actions', 'j-loreaux', 'teorth'] |
j-loreaux assignee:j-loreaux |
2-66909 2 days ago |
12-6757 12 days ago |
30-33207 30 days |
| 41641 |
adomani author:adomani |
chore: add missing `to_additive` docstrings in GroupTheory |
Adds the missing additive doc-strings (multiplicative side has a hand-written doc-string, additive side did not) across 17 file(s) in **GroupTheory**.
The additive doc-strings are simple-minded translations of the multiplicative ones, with referenced lemma names replaced by their `to_additive` counterparts. These gaps were found by an environment linter that pairs each declaration with its `to_additive` counterpart and checks that both or neither is documented.
🤖 Generated with [Claude Code](https://claude.com/claude-code) |
LLM-generated
t-group-theory
maintainer-merge
awaiting-requeue
|
68/33 |
Mathlib/GroupTheory/Congruence/Hom.lean,Mathlib/GroupTheory/Coset/Defs.lean,Mathlib/GroupTheory/CosetCover.lean,Mathlib/GroupTheory/Exponent.lean,Mathlib/GroupTheory/FinitelyPresentedGroup.lean,Mathlib/GroupTheory/FreeGroup/Basic.lean,Mathlib/GroupTheory/MonoidLocalization/Lemmas.lean,Mathlib/GroupTheory/Nilpotent.lean,Mathlib/GroupTheory/NoncommPiCoprod.lean,Mathlib/GroupTheory/OreLocalization/Basic.lean,Mathlib/GroupTheory/OreLocalization/OreSet.lean,Mathlib/GroupTheory/Perm/Cycle/Type.lean,Mathlib/GroupTheory/QuotientGroup/Defs.lean,Mathlib/GroupTheory/ResiduallyFinite.lean,Mathlib/GroupTheory/SpecificGroups/Cyclic.lean,Mathlib/GroupTheory/SpecificGroups/KleinFour.lean,Mathlib/GroupTheory/Submonoid/Center.lean |
17 |
4 |
['github-actions', 'mathlib-bors', 'mathlib-merge-conflicts', 'riccardobrasca', 'tb65536'] |
nobody |
2-43221 2 days ago |
10-6603 10 days ago |
16-83176 16 days |
| 37232 |
mathlib-splicebot author:mathlib-splicebot |
chore(Algebra/Order): bound on `|n / m|ₘ` and `|n - m|` |
This PR was automatically created from PR #34722 by @GrigorenkoPV via a [review comment](https://github.com/leanprover-community/mathlib4/pull/34722#discussion_r2996870566) by @Vierkantor. |
t-algebra
maintainer-merge
label:t-algebra$ |
5/0 |
Mathlib/Algebra/Order/Group/Unbundled/Abs.lean |
1 |
14 |
['Vierkantor', 'bryangingechen', 'github-actions', 'grunweg', 'mathlib-bors', 'themathqueen'] |
nobody |
2-23152 2 days ago |
8-4014 8 days ago |
45-37382 45 days |
| 41121 |
Scarlett-le author:Scarlett-le |
feat(Geometry/Euclidean/Angle): add the Alternate segment theorem |
Adds the Alternate segment theorem to`Mathlib/Geometry/Euclidean/Angle/Sphere.lean`:
if a line is tangent to a sphere `s` at `p₁`
and `p₁`, `p₂`, `p₃` lie on `s`, then twice the oriented angle from the tangent to the chord
`p₁p₂` equals twice the inscribed angle subtending `p₁p₂` at `p₃`. As elsewhere in this file,
the angles are doubled because the underlying oriented angles agree only mod `π`.
----
- [x] depends on: #41143 |
t-euclidean-geometry
maintainer-merge
|
27/0 |
Mathlib/Geometry/Euclidean/Angle/Sphere.lean |
1 |
7 |
['felixpernegger', 'github-actions', 'jsm28', 'mathlib-dependent-issues', 'mathlib-merge-conflicts'] |
nobody |
2-23140 2 days ago |
37-45254 37 days ago |
40-3884 40 days |
| 41154 |
sgouezel author:sgouezel |
feat: the variation of a Stieltjes vector measure |
---
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[](https://gitpod.io/from-referrer/)
|
t-measure-probability
maintainer-merge
|
330/5 |
Mathlib/MeasureTheory/VectorMeasure/BoundedVariation.lean,Mathlib/MeasureTheory/VectorMeasure/Variation/Basic.lean |
2 |
20 |
['EtienneC30', 'github-actions', 'mathlib-merge-conflicts', 'sgouezel'] |
EtienneC30 assignee:EtienneC30 |
2-10441 2 days ago |
3-18139 3 days ago |
38-125 38 days |
| 42375 |
TJHeeringa author:TJHeeringa |
feat(Analysis/Normed): add `LinearMap.extendOfIsometry` |
Adds `LinearMap.extendOfIsometry`, the extention of a linear map `f : E →ₛₗ[𝕜] F` between normed spaces to a linear isometry `Eₗ →ₗᵢ[𝕜] Fₗ` between Banach spaces with a dense map `e₁ : E →ₗ[𝕜] Eₗ`, a linear map `e₂ : F →ₗ[𝕜] Fₗ` and the corresponding norm estimate.
---
`LinearEquiv` and `ContinuousLinearMap` have this extension, but a corresponding one for `LinearIsometry` does not exist.
I called this `extendOfIsometry` because `LinearIsometry.extend` map already [exists](https://leanprover-community.github.io/mathlib4_docs/Mathlib/Analysis/InnerProductSpace/PiL2.html#LinearIsometry.extend) and `LinearEquiv` has a similar map. That map is the special case of `LinearIsometry.extendOfIsometry` when the input space is a submodule of a finite dimensional inner product space. A case could be made for calling `LinearIsometry.extendOfIsometry` `LinearIsometry.extend` and renaming the existing `LinearIsometry.extendOfIsometry` to `LinearIsometry.extendOfFin`.
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|
t-analysis
maintainer-merge
|
42/5 |
Mathlib/Analysis/Normed/Operator/Extend.lean |
1 |
28 |
['TJHeeringa', 'github-actions', 'mcdoll', 'wwylele'] |
mcdoll assignee:mcdoll |
1-57971 1 day ago |
2-30074 2 days ago |
4-48103 4 days |
| 41818 |
Vierkantor author:Vierkantor |
feat(Tactic/Linter): add linter for missing `@[tactic_alt]` tags |
This PR adds a `tacticAlt` linter that complains when there are two tactics with the same user-facing name (usually: the first token in their syntax) but they aren't marked as `@[tactic_alt]` to each other. Those situations lead to duplicate entries in doc-gen's tactic overview page.
You can see example output in the tests file, or in the [build log](https://github.com/leanprover-community/mathlib4/actions/runs/29502419244/job/87654684693).
The current simple implementation has one limitation: if multiple duplicates are all being linted at once, each of them gets a linter warning. I think this is okay, but we could be a bit stricter and only produce the warning on the tactic that comes later in the environment.
---
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[](https://gitpod.io/from-referrer/)
|
t-linter
maintainer-merge
|
75/0 |
Mathlib/Tactic/ApplyAt.lean,Mathlib/Tactic/ClearExcept.lean,Mathlib/Tactic/Linter/TacticDocumentation.lean,MathlibTest/Linter/TacticDoc.lean |
4 |
6 |
['JovanGerb', 'adomani', 'github-actions', 'leanprover-radar'] |
nobody |
1-52591 1 day ago |
22-79492 22 days ago |
22-79280 22 days |
| 42075 |
Parcly-Taxel author:Parcly-Taxel |
chore: delete deprecated declarations/modules from January 2026 |
`Mathlib.Util.MemoFix` is directly removed since all deprecations in it are more than 6 months old. |
tech debt
file-removed
maintainer-merge
|
1/2758 |
Mathlib.lean,Mathlib/Algebra/Algebra/Basic.lean,Mathlib/Algebra/Algebra/Epi.lean,Mathlib/Algebra/Algebra/NonUnitalSubalgebra.lean,Mathlib/Algebra/BigOperators/Finprod.lean,Mathlib/Algebra/Category/ModuleCat/Semi.lean,Mathlib/Algebra/Category/Ring/Epi.lean,Mathlib/Algebra/Group/Basic.lean,Mathlib/Algebra/Group/Int/Defs.lean,Mathlib/Algebra/GroupWithZero/Action/Defs.lean,Mathlib/Algebra/GroupWithZero/Basic.lean,Mathlib/Algebra/GroupWithZero/Defs.lean,Mathlib/Algebra/GroupWithZero/Int.lean,Mathlib/Algebra/GroupWithZero/NonZeroDivisors.lean,Mathlib/Algebra/GroupWithZero/Regular.lean,Mathlib/Algebra/ModEq.lean,Mathlib/Algebra/Module/Hom.lean,Mathlib/Algebra/Module/LinearMap/End.lean,Mathlib/Algebra/NoZeroSMulDivisors/Prod.lean,Mathlib/Algebra/Order/Archimedean/Real/Basic.lean,Mathlib/Algebra/Polynomial/Degree/Definitions.lean,Mathlib/Algebra/Polynomial/Splits.lean,Mathlib/Algebra/Ring/Regular.lean,Mathlib/AlgebraicGeometry/Artinian.lean,Mathlib/AlgebraicGeometry/Cover/MorphismProperty.lean,Mathlib/AlgebraicGeometry/Morphisms/ClosedImmersion.lean,Mathlib/AlgebraicGeometry/Morphisms/FinitePresentation.lean,Mathlib/AlgebraicGeometry/Morphisms/FiniteType.lean,Mathlib/AlgebraicGeometry/Morphisms/Flat.lean,Mathlib/AlgebraicGeometry/Morphisms/FormallyUnramified.lean,Mathlib/AlgebraicGeometry/Morphisms/OpenImmersion.lean,Mathlib/AlgebraicGeometry/Morphisms/Preimmersion.lean,Mathlib/AlgebraicGeometry/Morphisms/Separated.lean,Mathlib/AlgebraicGeometry/Morphisms/SurjectiveOnStalks.lean,Mathlib/AlgebraicGeometry/Morphisms/UniversallyClosed.lean,Mathlib/AlgebraicGeometry/Morphisms/UniversallyOpen.lean,Mathlib/AlgebraicTopology/FundamentalGroupoid/SimplyConnected.lean,Mathlib/AlgebraicTopology/ModelCategory/CofibrantObjectHomotopy.lean,Mathlib/Analysis/Analytic/Composition.lean,Mathlib/Analysis/Asymptotics/AsymptoticEquivalent.lean,Mathlib/Analysis/Calculus/Deriv/Mul.lean,Mathlib/Analysis/Calculus/FDeriv/Add.lean,Mathlib/Analysis/Calculus/Implicit.lean,Mathlib/Analysis/Calculus/ImplicitContDiff.lean,Mathlib/Analysis/Calculus/TangentCone/Basic.lean,Mathlib/Analysis/Complex/IntegerCompl.lean,Mathlib/Analysis/Complex/Schwarz.lean,Mathlib/Analysis/Complex/TaylorSeries.lean,Mathlib/Analysis/Complex/UnitDisc/Basic.lean,Mathlib/Analysis/Complex/UpperHalfPlane/Basic.lean,Mathlib/Analysis/Convex/Body.lean,Mathlib/Analysis/Distribution/FourierSchwartz.lean,Mathlib/Analysis/Distribution/SchwartzSpace.lean,Mathlib/Analysis/Distribution/SchwartzSpace/Fourier.lean,Mathlib/Analysis/Distribution/TemperedDistribution.lean,Mathlib/Analysis/Fourier/Notation.lean,Mathlib/Analysis/InnerProductSpace/Orthogonal.lean,Mathlib/Analysis/InnerProductSpace/PiL2.lean,Mathlib/Analysis/LocallyConvex/Barrelled.lean,Mathlib/Analysis/Matrix/Spectrum.lean,Mathlib/Analysis/Normed/Group/Basic.lean,Mathlib/Analysis/Normed/Group/Pointwise.lean,Mathlib/Analysis/Normed/Module/Ball/Pointwise.lean,Mathlib/Analysis/Normed/Order/Basic.lean,Mathlib/Analysis/Normed/Unbundled/SeminormFromConst.lean,Mathlib/Analysis/Polynomial/MahlerMeasure.lean,Mathlib/Analysis/Real/Hyperreal.lean,Mathlib/Analysis/SpecialFunctions/Complex/Log.lean,Mathlib/Analysis/SpecialFunctions/NonIntegrable.lean,Mathlib/Analysis/SpecialFunctions/Trigonometric/Cotangent.lean,Mathlib/CategoryTheory/Adjunction/Opposites.lean,Mathlib/CategoryTheory/Category/Grpd.lean,Mathlib/CategoryTheory/Limits/Shapes/Products.lean,Mathlib/CategoryTheory/Limits/Shapes/Pullback/CommSq.lean,Mathlib/CategoryTheory/Limits/Shapes/Pullback/Equifibered.lean,Mathlib/CategoryTheory/MorphismProperty/Basic.lean,Mathlib/CategoryTheory/Sites/IsSheafFor.lean,Mathlib/CategoryTheory/Triangulated/TStructure/Basic.lean,Mathlib/Combinatorics/SimpleGraph/AdjMatrix.lean,Mathlib/Combinatorics/SimpleGraph/Coloring/Vertex.lean,Mathlib/Combinatorics/SimpleGraph/VertexCover.lean,Mathlib/Computability/Primrec.lean,Mathlib/Computability/Primrec/Basic.lean,Mathlib/Data/Finsupp/Basic.lean,Mathlib/Data/Fintype/Prod.lean,Mathlib/Data/Int/ModEq.lean,Mathlib/Data/List/Basic.lean,Mathlib/Data/List/Flatten.lean,Mathlib/Data/List/GetD.lean,Mathlib/Data/Option/Basic.lean,Mathlib/Data/Option/Defs.lean,Mathlib/Data/Set/Card.lean,Mathlib/Data/SetLike/Basic.lean,Mathlib/Data/Tree/RBMap.lean,Mathlib/FieldTheory/Isaacs.lean,Mathlib/Geometry/Manifold/PartitionOfUnity.lean,Mathlib/Geometry/Manifold/Riemannian/Basic.lean,Mathlib/Lean/Expr.lean,Mathlib/Lean/Expr/ReplaceRec.lean,Mathlib/LinearAlgebra/AffineSpace/AffineSubspace/Basic.lean |
184 |
5 |
['Parcly-Taxel', 'github-actions', 'grunweg', 'joneugster', 'mathlib-merge-conflicts'] |
joneugster assignee:joneugster |
1-41740 1 day ago |
1-45352 1 day ago |
13-83647 13 days |
| 40578 |
CoolRmal author:CoolRmal |
feat(Topology/Order): convergence of suprema and infima |
The main lemma proved in this PR is that for every function `a : ι → α`, `Tendsto (fun F : Finset ι => F.inf a) atTop (𝓝 (⨅ i, a i))`, where `α` is a complete lattice and a SupConvergenceClass. The corresponding versions for `ciSup`, `iInf`, `ciInf` are also proved. We also prove `ciSup_eq_ciSup_finset`, which is the analogue of [iSup_eq_iSup_finset](https://leanprover-community.github.io/mathlib4_docs/Mathlib/Order/CompleteLattice/Finset.html#iSup_eq_iSup_finset)
Created with the help of codex.
---
<!-- Your PR title will become the first line of the commit message.
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t-topology
maintainer-merge
|
67/0 |
Mathlib/Data/Finset/Lattice/Fold.lean,Mathlib/Order/ConditionallyCompleteLattice/Finset.lean,Mathlib/Topology/Order/MonotoneConvergence.lean |
3 |
13 |
['CoolRmal', 'github-actions', 'mathlib-merge-conflicts', 'scholzhannah'] |
scholzhannah assignee:scholzhannah |
1-35274 1 day ago |
3-78841 3 days ago |
16-48865 16 days |
| 42227 |
kebekus author:kebekus |
feat: API for (co)discrete sets |
Establish simple but useful API for dealing with (co)discrete sets.
---
<!-- 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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- Nat.bit1_add_bit1
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|
t-topology
maintainer-merge
|
125/2 |
Mathlib/Algebra/Polynomial/Roots.lean,Mathlib/Analysis/Calculus/Deriv/Basic.lean,Mathlib/Analysis/Calculus/FDeriv/Congr.lean,Mathlib/Topology/Algebra/Polynomial.lean,Mathlib/Topology/DiscreteSubset.lean |
5 |
36 |
['CoolRmal', 'felixpernegger', 'github-actions', 'kebekus'] |
nobody |
1-32153 1 day ago |
2-28710 2 days ago |
9-74300 9 days |
| 42221 |
mcdoll author:mcdoll |
feat(Data/FunLike): add `IsTorsionFree` theorems |
Needed for `Finsupp` and `MeasureTheory.Measure`
The lemma about torsion-free monoids was contributed in #24312.
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|
t-data
large-import
maintainer-merge
|
53/12 |
Mathlib.lean,Mathlib/Algebra/Group/Finsupp.lean,Mathlib/Algebra/Group/Pi/Lemmas.lean,Mathlib/Algebra/Group/Pi/Torsion.lean,Mathlib/Algebra/Order/Antidiag/Pi.lean,Mathlib/Data/FunLike/Group.lean,Mathlib/Data/FunLike/Module.lean |
7 |
9 |
['github-actions', 'grunweg', 'joneugster', 'mcdoll'] |
joneugster assignee:joneugster |
1-31117 1 day ago |
5-44003 5 days ago |
10-28211 10 days |
| 40855 |
NoahW314 author:NoahW314 |
feat(Data/ENNReal): add `sum_div` |
`Finset.sum_div` does not apply since `ℝ≥0∞` is not a `DivisionSemiring`. Although the proof of `Finset.sum_div` (and of this lemma) only needs `DivInvMonoid` and `NonUnitalNonAssocSemiring`, the best typeclass including these is `DivisionSemiring`.
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[](https://gitpod.io/from-referrer/)
Removed the `open ENNReal` in `MeanInequalities` to avoid ambiguity with `Finset.sum_div`.
|
t-data
maintainer-merge
|
7/1 |
Mathlib/Analysis/MeanInequalities.lean,Mathlib/Data/ENNReal/BigOperators.lean |
2 |
8 |
['NoahW314', 'SnirBroshi', 'github-actions', 'joneugster', 'madvorak'] |
joneugster assignee:joneugster |
1-28987 1 day ago |
5-37936 5 days ago |
48-49700 48 days |
| 41740 |
themathqueen author:themathqueen |
chore(Topology/Algebra/LinearMapCompletion): generalize `UniformSpace.Completion.toComplL` |
Generalize and move `toComplL` to a more appropriate file.
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(`toCompl`, `toComplL`, `toComplₗᵢ`, etc... aren't great names in my opinion, but that's a separate issue for another time)
(In another PR (maybe sometime in the near future), we should make the variables R and α explicit for `toCompl`, `toComplL`, and `toComplₗᵢ`.)
[](https://gitpod.io/from-referrer/)
|
t-topology
maintainer-merge
|
26/20 |
Mathlib/Analysis/InnerProductSpace/Reproducing.lean,Mathlib/Analysis/Normed/Module/Completion.lean,Mathlib/MeasureTheory/Integral/IntervalIntegral/DistLEIntegral.lean,Mathlib/Topology/Algebra/LinearMapCompletion.lean |
4 |
6 |
['TJHeeringa', 'github-actions', 'mathlib-merge-conflicts', 'scholzhannah', 'themathqueen'] |
scholzhannah assignee:scholzhannah |
1-25418 1 day ago |
3-172 2 days ago |
24-23485 24 days |
| 41361 |
lakesare author:lakesare |
feat(Order/ConditionallyCompleteLattice/Finset): add `sup_eq_ciSup` |
From the Carleson project.
___
**Upstreaming from Carleson: [/Carleson/ToMathlib/Data/Finset/Lattice/Fold.lean](https://github.com/fpvandoorn/carleson/blob/a3e427dc0f23f6b818c7f7d32f2b1d2ccfab1f21/Carleson/ToMathlib/Data/Finset/Lattice/Fold.lean)**
Changes from the Carleson version:
1. `sup_eq_iSup'` is refactored (to shorten the proof & to make some of the imports unnecessary)
2. `sup_eq_iSup'` is renamed to `sup_eq_ciSup`
3. Carleson-suggested file was `/Data/Finset/Lattice/Fold.lean`, but we placed the theorem into `/Order/ConditionallyCompleteLattice/Finset.lean`
|
carleson
new-contributor
t-order
maintainer-merge
|
8/9 |
Mathlib/Order/ConditionallyCompleteLattice/Finset.lean |
1 |
21 |
['SnirBroshi', 'github-actions', 'j-loreaux', 'lakesare', 'themathqueen'] |
nobody |
1-21750 1 day ago |
1-36352 1 day ago |
19-49207 19 days |
| 42292 |
stevenliuyi author:stevenliuyi |
feat(Probability/Kernel/Composition): kernel Radon-Nikodym derivative of composition products |
This PR resolves the TODO in this file by adding `rnDeriv_measure_compProd_right` and `rnDeriv_measure_compProd`, which replace `∂(μ ⊗ₘ κ)/∂(μ ⊗ₘ η)` by `∂κ/∂η` under the suitable assumptions.
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|
t-measure-probability
large-import
new-contributor
maintainer-merge
|
56/7 |
Mathlib/Probability/Kernel/Composition/RadonNikodym.lean |
1 |
12 |
['EtienneC30', 'github-actions', 'stevenliuyi'] |
EtienneC30 assignee:EtienneC30 |
1-16428 1 day ago |
1-37407 1 day ago |
7-72980 7 days |
| 41383 |
joelriou author:joelriou |
feat(Algebra/Category/ModuleCat): the category of sheaves of modules is Grothendieck abelian |
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[](https://gitpod.io/from-referrer/)
|
t-category-theory
maintainer-merge
|
127/5 |
Mathlib.lean,Mathlib/Algebra/Category/ModuleCat/Presheaf/Generator.lean,Mathlib/AlgebraicGeometry/Modules/Sheaf.lean,Mathlib/AlgebraicGeometry/Modules/Tilde.lean,Mathlib/CategoryTheory/Abelian/GrothendieckAxioms/PresheafOfModules.lean,Mathlib/CategoryTheory/Abelian/GrothendieckAxioms/SheafOfModules.lean,Mathlib/CategoryTheory/Generator/Basic.lean |
7 |
3 |
['alreadydone', 'github-actions'] |
nobody |
1-12543 1 day ago |
1-13234 1 day ago |
34-3206 34 days |
| 42528 |
joelriou author:joelriou |
chore(CategoryTheory): `implicit_reducible` for compositions of natural transformations |
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[](https://gitpod.io/from-referrer/)
|
t-category-theory
easy
maintainer-merge
|
2/2 |
Mathlib/CategoryTheory/Functor/Category.lean,Mathlib/CategoryTheory/NatTrans.lean |
2 |
4 |
['github-actions', 'joelriou', 'leanprover-radar', 'robin-carlier'] |
nobody |
1-5798 1 day ago |
1-18556 1 day ago |
1-18332 1 day |
| 41993 |
eneoli author:eneoli |
feat(Tactic/Linter/UnusedTactic): mark `isIgnoreTacticKind` and `addIgnoreTacticKind` as public |
Marks `isIgnoreTacticKind` and `addIgnoreTacticKind` in the `unusedTactic` linter as `public` definitions.
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|
t-linter
new-contributor
maintainer-merge
merge-conflict
|
26/2 |
Mathlib/Tactic/Linter/UnusedTactic.lean,MathlibTest/Linter/UnusedTactic.lean |
2 |
6 |
['github-actions', 'joneugster', 'mathlib-merge-conflicts'] |
joneugster assignee:joneugster |
0-82596 22 hours ago |
0-82597 22 hours ago |
16-72449 16 days |
| 42526 |
joelriou author:joelriou |
feat(CategoryTheory): more API for `IsoCat` |
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[](https://gitpod.io/from-referrer/)
|
t-category-theory
maintainer-merge
|
54/3 |
Mathlib/CategoryTheory/IsoCat.lean |
1 |
9 |
['github-actions', 'joelriou', 'robin-carlier'] |
nobody |
0-74808 20 hours ago |
0-84381 23 hours ago |
1-11564 1 day |
| 42529 |
joelriou author:joelriou |
chore(CategoryTheory): composition implicit reducible in `Type` |
This is meant to be used in combination with #42528 in order to have better "defeq" for categories of functors to types.
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|
t-category-theory
easy
maintainer-merge
|
2/2 |
Mathlib/CategoryTheory/Types/Basic.lean |
1 |
5 |
['github-actions', 'joelriou', 'leanprover-radar', 'robin-carlier'] |
nobody |
0-74789 20 hours ago |
0-81752 22 hours ago |
1-6945 1 day |
| 42491 |
grunweg author:grunweg |
chore(Geometry/Manifold/Notation): avoid more superfluous work in cus… |
…tom elaborators
We can use mkAppOptM instead of passing from an expression to syntax and re-elaborating that. Continuation of #40933.
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|
t-differential-geometry
easy
t-meta
maintainer-merge
|
6/11 |
Mathlib/Geometry/Manifold/Notation.lean |
1 |
5 |
['github-actions', 'thorimur'] |
nobody |
0-72706 20 hours ago |
2-19095 2 days ago |
2-18871 2 days |
| 42250 |
grunweg author:grunweg |
feat: support inferring a model with corners on a manifold over Euclidean (half-)space or quadrant |
Follow-up to https://github.com/leanprover-community/mathlib4/pull/40075. (Re-)discovered during `scholzhannah`'s master's thesis.
---
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t-differential-geometry
t-meta
maintainer-merge
|
65/6 |
Mathlib/Geometry/Manifold/Notation.lean,MathlibTest/DifferentialGeometry/Notation/Advanced.lean,MathlibTest/DifferentialGeometry/Notation/Basic.lean |
3 |
7 |
['github-actions', 'grunweg', 'joneugster', 'thorimur'] |
joneugster assignee:joneugster |
0-72435 20 hours ago |
10-711 10 days ago |
10-487 10 days |
| 42289 |
grunweg author:grunweg |
refactor: add a separate delaborator for TotalSpace.mk' |
This allows removing the special-casing of the T% syntax in the differential geometry custom delaborators, massively reducing code duplication: the same code was repeated eight times (and #41005 would have added another four copies).
A secondary motivation is that the current delaborator code has a bug, and fixing this once is much better than doing so eight or twelve times. (This will happen in a follow-up.)
---
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|
t-differential-geometry
maintainer-merge
|
78/146 |
Mathlib/Geometry/Manifold/Notation.lean,MathlibTest/DifferentialGeometry/Notation/Basic.lean |
2 |
26 |
['JovanGerb', 'github-actions', 'grunweg', 'thorimur'] |
nobody |
0-71917 19 hours ago |
8-19701 8 days ago |
8-59407 8 days |
| 41813 |
sqrt-of-2 author:sqrt-of-2 |
feat(LinearAlgebra): totally nonnegative matrices |
Define totally nonnegative matrices and add a basic API.
A matrix is totally nonnegative if all its finite minors have nonnegative determinant.
From RealRooted
Co-authored-by: Yaël Dillies <yael.dillies@gmail.com>
---
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|
new-contributor
t-algebra
maintainer-merge
label:t-algebra$ |
115/1 |
Mathlib.lean,Mathlib/Data/Set/Finite/Range.lean,Mathlib/LinearAlgebra/Matrix/Determinant/TotallyNonneg.lean,Mathlib/Order/Hom/Set.lean |
4 |
19 |
['Vierkantor', 'YaelDillies', 'github-actions', 'j-loreaux', 'sqrt-of-2', 'vlad902'] |
j-loreaux assignee:j-loreaux |
0-59640 16 hours ago |
0-62297 17 hours ago |
19-81380 19 days |
| 38319 |
Zetetic-Dhruv author:Zetetic-Dhruv |
feat(Combinatorics/SetFamily): Assouad's dual VC bound |
Adds the Finset-level form of Assouad's 1983 dual VC bound: if a family
`𝒜 : Finset (Finset α)` has VC dimension at most `d`, then for any
ground set `X : Finset α` the dual family
`{𝒜.filter (· ∋ x) : x ∈ X}` has VC dimension at most `2 ^ (d + 1) - 1`.
New declarations (in `Finset` namespace):
- `dualFamily 𝒜 X`: for each `x ∈ X`, the subfamily `{A ∈ 𝒜 | x ∈ A}`
- `mem_dualFamily` (`@[simp]`): membership characterisation
- `exists_shatters_of_dualFamily_shatters`: Assouad's bitstring-coding lemma
- `vcDim_dualFamily_le`: the headline VC bound
Proof by Assouad's classical bitstring-coding argument. Sits on top of `Finset.shatterer` / `Finset.vcDim` from
`Mathlib.Combinatorics.SetFamily.Shatter`.
References:
- P. Assouad, Densite et dimension, Ann. Inst. Fourier 33(3) (1983), Thm 2.13
- J. Matousek, Lectures on Discrete Geometry, GTM 212, Springer, 2002, Section 10.3 Lemma 10.3.3
---
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|
t-combinatorics
new-contributor
maintainer-merge
|
199/0 |
Mathlib.lean,Mathlib/Combinatorics/SetFamily/DualVC.lean,docs/references.bib |
3 |
44 |
['Shreyas4991', 'YaelDillies', 'Zetetic-Dhruv', 'github-actions'] |
nobody |
0-52591 14 hours ago |
90-65208 90 days ago |
107-25633 107 days |
| 40904 |
jiangf13 author:jiangf13 |
chore(Algebra/Group/WithOne): remove stale TODO |
The TODO claimed that `WithOne.coe_mul` and `WithZero.coe_mul` have inconsistent implicit parameters. Their current signatures are both of the form `{α} [Mul α] (a b : α)`, so the TODO is stale.
---
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|
t-algebra
new-contributor
maintainer-merge
label:t-algebra$ |
0/4 |
Mathlib/Algebra/Group/WithOne/Defs.lean |
1 |
3 |
['Multramate', 'github-actions', 'themathqueen'] |
nobody |
0-52583 14 hours ago |
46-85779 46 days ago |
46-85555 46 days |
| 42429 |
vlad902 author:vlad902 |
feat(LocalRing): trivial generalization of RingEquiv.isLocalRing to non-commutative semirings |
Currently `RingEquiv.isLocalRing` is stated only for the case when one of the rings is commutative, but generalizing it to non-commutative rings only involves generalizing type classes.
---
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|
t-ring-theory
maintainer-merge
|
4/8 |
Mathlib/RingTheory/LocalRing/Basic.lean,Mathlib/RingTheory/LocalRing/RingHom/Basic.lean |
2 |
2 |
['Whysoserioushah', 'github-actions', 'robin-carlier'] |
nobody |
0-7657 2 hours ago |
4-2093 4 days ago |
4-2910 4 days |
| 40510 |
felixpernegger author:felixpernegger |
refactor: reorganize Topology/EMetricSpace/Defs to generalise basic results |
This PR reorganizes the Topology/EMetricSpace/Defs so that various results that previously only held for `PseudoEMetricSpace` now also hold for `WeakPseudoEMetricSpace` (in particular, `ENNReal`). This is a necessary stepping stone to generalise many definitions and theorems to `WeakPseudoEMetricSpace`.
---
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|
t-topology
maintainer-merge
|
273/186 |
Mathlib.lean,Mathlib/Topology/EMetricSpace/Defs.lean,Mathlib/Topology/EMetricSpace/MulOpposite.lean,Mathlib/Topology/EMetricSpace/Weak.lean,Mathlib/Topology/MetricSpace/HausdorffDistance.lean,Mathlib/Topology/MetricSpace/IsometricSMul.lean,Mathlib/Topology/MetricSpace/Pseudo/Defs.lean |
7 |
32 |
['felixpernegger', 'github-actions', 'grunweg', 'mathlib-bors', 'scholzhannah'] |
scholzhannah assignee:scholzhannah |
0-6401 1 hour ago |
0-7844 2 hours ago |
51-70407 51 days |
| 42557 |
thorimur author:thorimur |
chore: remove some `backward.privateInPublic` by adjusting visibility |
This PR removes a batch of `set_option backward.privateInPublic true` by adjusting visibility according to the following rules:
1. If a theorem is about an already-private definition, it too may as well be private.
2. We can `@[no_expose]` defs that use private definitions
3. We can private definitions that have no consumers besides an exposed body
---
Disclosure: I told Claude to undo the changes to GroupTheory.OreLocalization.Basic so I didn't need to write out the git command 🙃 The rest is manual.
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|
tech debt
maintainer-merge
|
21/73 |
Mathlib/Computability/Partrec.lean,Mathlib/Data/Fin/Tuple/Basic.lean,Mathlib/Data/Fintype/EquivFin.lean,Mathlib/Data/Nat/Find.lean,Mathlib/Data/Nat/Prime/Defs.lean,Mathlib/Data/Seq/Parallel.lean,Mathlib/Logic/Denumerable.lean,Mathlib/Logic/Encodable/Basic.lean,Mathlib/Logic/Equiv/Multiset.lean,Mathlib/Logic/Godel/GodelBetaFunction.lean,Mathlib/Order/DirectedInverseSystem.lean,Mathlib/Order/Lattice/Congruence.lean |
12 |
3 |
['JovanGerb', 'github-actions'] |
nobody |
0-1038 17 minutes ago |
0-36392 10 hours ago |
0-38640 10 hours |
| Number |
Author |
Title |
Description |
Labels |
+/- |
Modified files (first 100) |
📝 |
💬 |
All users who commented or reviewed |
Assignee(s) |
Updated |
Last status change |
total time in review |
| 17623 |
astrainfinita author:astrainfinita |
feat(Algebra/Order/GroupWithZero/Unbundled): add some lemmas |
Some lemmas in `Algebra.Order.GroupWithZero.Unbundled` have incorrect or unsatisfactory names, or assumptions that can be omitted using `ZeroLEOneClass`. The lemmas added in this PR are versions of existing lemmas that use the correct or better name or `ZeroLEOneClass` to omit an assumption. The original lemmas will be deprecated in #17593.
| New name | Old name |
|-------------------------|-------------------------|
| `mul_le_one_left₀` | `Left.mul_le_one_of_le_of_le` |
| `mul_lt_one_of_le_of_lt_left₀` (`0 ≤ ·` version) / `mul_lt_one_of_le_of_lt_of_pos_left` | `Left.mul_lt_of_le_of_lt_one_of_pos` |
| `mul_lt_one_of_lt_of_le_left₀` | `Left.mul_lt_of_lt_of_le_one_of_nonneg` |
| `mul_le_one_right₀` | `Right.mul_le_one_of_le_of_le` |
| `mul_lt_one_of_lt_of_le_right₀` (`0 ≤ ·` version) / `mul_lt_one_of_lt_of_le_of_pos_right` | `Right.mul_lt_one_of_lt_of_le_of_pos` |
| `mul_lt_one_of_le_of_lt_right₀` | `Right.mul_lt_one_of_le_of_lt_of_nonneg` |
The following lemmas use `ZeroLEOneClass`.
| New name | Old name |
|-------------------------|-------------------------|
| `(Left.)one_le_mul₀` | `Left.one_le_mul_of_le_of_le` |
| `Left.one_lt_mul_of_le_of_lt₀` | `Left.one_lt_mul_of_le_of_lt_of_pos` |
| `Left.one_lt_mul_of_lt_of_le₀` | `Left.lt_mul_of_lt_of_one_le_of_nonneg` / `one_lt_mul_of_lt_of_le` (still there) |
| `(Left.)one_lt_mul₀` | |
| `Right.one_le_mul₀` | `Right.one_le_mul_of_le_of_le` |
| `Right.one_lt_mul_of_lt_of_le₀` | `Right.one_lt_mul_of_lt_of_le_of_pos` |
| `Right.one_lt_mul_of_le_of_lt₀` | `Right.one_lt_mul_of_le_of_lt_of_nonneg` / `one_lt_mul_of_le_of_lt` (still there) / `one_lt_mul` (still there) |
| `Right.one_lt_mul₀` | `Right.one_lt_mul_of_lt_of_lt` |
---
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Split from #17593.
[](https://gitpod.io/from-referrer/)
|
merge-conflict
t-algebra
awaiting-zulip
t-order
label:t-algebra$ |
146/44 |
Mathlib/Algebra/Order/GroupWithZero/Canonical.lean,Mathlib/Algebra/Order/GroupWithZero/Unbundled.lean |
2 |
11 |
['YaelDillies', 'astrainfinita', 'github-actions', 'j-loreaux'] |
nobody |
626-11974 1 year ago |
633-4533 633 days ago |
33-64877 33 days |
| 15654 |
TpmKranz author:TpmKranz |
feat(Computability): language-preserving maps between NFA and RE |
Map REs to NFAs via Thompson's construction and NFAs to REs using GNFAs
Last chunk of #12648
---
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- [ ] depends on: #15651
- [ ] depends on: #15649
[](https://gitpod.io/from-referrer/)
|
blocked-by-other-PR
new-contributor
t-computability
merge-conflict
awaiting-zulip
|
985/2 |
Mathlib.lean,Mathlib/Computability/GNFA.lean,Mathlib/Computability/Language.lean,Mathlib/Computability/NFA.lean,Mathlib/Computability/RegularExpressions.lean,Mathlib/Data/FinEnum/Option.lean,docs/references.bib |
7 |
3 |
['github-actions', 'meithecatte'] |
nobody |
459-61651 1 year ago |
728-84836 728 days ago |
0-179 2 minutes |
| 17458 |
urkud author:urkud |
refactor(Algebra/Group): make `IsUnit` a typeclass |
Also change some lemmas to assume `[IsUnit _]` instead of `[Invertible _]`.
Motivated by potential non-defeq diamonds in #14986, see also [Zulip](https://leanprover.zulipchat.com/#narrow/stream/116395-maths/topic/Invertible.20and.20data)
I no longer plan to merge this PR, but I'm going to cherry-pick some changes to a new PR before closing this one.
---
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[](https://gitpod.io/from-referrer/)
|
merge-conflict
t-algebra
awaiting-zulip
label:t-algebra$ |
82/72 |
Mathlib/Algebra/CharP/Invertible.lean,Mathlib/Algebra/Group/Invertible/Basic.lean,Mathlib/Algebra/Group/Units/Defs.lean,Mathlib/Algebra/GroupWithZero/Invertible.lean,Mathlib/Algebra/GroupWithZero/Units/Basic.lean,Mathlib/Algebra/Polynomial/Degree/Units.lean,Mathlib/Algebra/Polynomial/Splits.lean,Mathlib/Analysis/Convex/Segment.lean,Mathlib/Analysis/Normed/Affine/Isometry.lean,Mathlib/Analysis/Normed/Ring/Units.lean,Mathlib/CategoryTheory/Linear/Basic.lean,Mathlib/FieldTheory/Finite/Basic.lean,Mathlib/FieldTheory/Separable.lean,Mathlib/FieldTheory/SeparableDegree.lean,Mathlib/GroupTheory/Submonoid/Inverses.lean,Mathlib/LinearAlgebra/AffineSpace/AffineEquiv.lean,Mathlib/LinearAlgebra/AffineSpace/Combination.lean,Mathlib/LinearAlgebra/CliffordAlgebra/Contraction.lean,Mathlib/LinearAlgebra/CliffordAlgebra/Inversion.lean,Mathlib/LinearAlgebra/CliffordAlgebra/SpinGroup.lean,Mathlib/LinearAlgebra/Eigenspace/Minpoly.lean,Mathlib/NumberTheory/MulChar/Basic.lean,Mathlib/RingTheory/Localization/NumDen.lean,Mathlib/RingTheory/Polynomial/Content.lean,Mathlib/RingTheory/Polynomial/GaussLemma.lean,Mathlib/RingTheory/Valuation/Basic.lean |
26 |
12 |
['MichaelStollBayreuth', 'acmepjz', 'eric-wieser', 'github-actions', 'leanprover-bot', 'leanprover-community-bot-assistant', 'urkud'] |
nobody |
399-42000 1 year ago |
670-76043 670 days ago |
0-66650 18 hours |
| 25218 |
kckennylau author:kckennylau |
feat(AlgebraicGeometry): Tate normal form of elliptic curves |
---
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[](https://gitpod.io/from-referrer/)
|
merge-conflict
t-algebraic-geometry
awaiting-zulip
new-contributor
|
291/26 |
Mathlib.lean,Mathlib/AlgebraicGeometry/EllipticCurve/IsomOfJ.lean,Mathlib/AlgebraicGeometry/EllipticCurve/Modular/TateNormalForm.lean,Mathlib/AlgebraicGeometry/EllipticCurve/NormalForms.lean,Mathlib/AlgebraicGeometry/EllipticCurve/VariableChange.lean |
5 |
31 |
['MichaelStollBayreuth', 'Multramate', 'acmepjz', 'github-actions', 'grunweg', 'kckennylau', 'leanprover-community-bot-assistant'] |
nobody |
399-40838 1 year ago |
432-15955 432 days ago |
6-44783 6 days |
| 28803 |
astrainfinita author:astrainfinita |
refactor: unbundle algebra from `ENormed*` |
Further speed up the search in the algebraic typeclass hierarchy by avoiding searching for `TopologicalSpace`.
This PR continues the work from #23961.
- Change `ESeminormed(Add)Monoid` and `ENormed(Add)Monoid` so they no longer carry algebraic data.
- Deprecate `ESeminormed(Add)CommMonoid` and `ENormed(Add)CommMonoid` in favor of `ESeminormed(Add)Monoid` and `ENormed(Add)Monoid` with a commutative algebraic typeclass.
|Old|New|
|---|---|
| `[ESeminormed(Add)(Comm)Monoid E]` | `[(Add)(Comm)Monoid E] [ESeminormed(Add)Monoid E]` |
| `[ENormed(Add)(Comm)Monoid]` | `[(Add)(Comm)Monoid E] [ENormed(Add)Monoid]` |
See [Zulip discussion](https://leanprover.zulipchat.com/#narrow/channel/144837-PR-reviews/topic/.2328803.20refactor.3A.20unbundle.20algebra.20from.20.60ENormed*.60/with/536024350)
------------
- [x] depends on: #28813 |
t-algebra
merge-conflict
slow-typeclass-synthesis
awaiting-zulip
t-analysis
label:t-algebra$ |
80/63 |
Mathlib/Analysis/CStarAlgebra/CStarMatrix.lean,Mathlib/Analysis/Normed/Group/Basic.lean,Mathlib/Analysis/Normed/Group/Continuity.lean,Mathlib/Analysis/Normed/Group/InfiniteSum.lean,Mathlib/Analysis/NormedSpace/IndicatorFunction.lean,Mathlib/MeasureTheory/Function/L1Space/AEEqFun.lean,Mathlib/MeasureTheory/Function/L1Space/HasFiniteIntegral.lean,Mathlib/MeasureTheory/Function/L1Space/Integrable.lean,Mathlib/MeasureTheory/Function/LocallyIntegrable.lean,Mathlib/MeasureTheory/Function/LpSeminorm/Basic.lean,Mathlib/MeasureTheory/Function/LpSeminorm/CompareExp.lean,Mathlib/MeasureTheory/Function/LpSeminorm/TriangleInequality.lean,Mathlib/MeasureTheory/Integral/IntegrableOn.lean,Mathlib/MeasureTheory/Integral/IntervalIntegral/Basic.lean |
14 |
28 |
['astrainfinita', 'bryangingechen', 'github-actions', 'grunweg', 'kbuzzard', 'leanprover-bot', 'mathlib-bors', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot', 'sgouezel'] |
grunweg assignee:grunweg |
339-56483 11 months ago |
348-7637 348 days ago |
0-19882 5 hours |
| 28925 |
grunweg author:grunweg |
chore: remove `linear_combination'` tactic |
When `linear_combination` was refactored in #15899, the old code was kept as the `linear_combination'` tactic, for easier migration. The consensus of the zulip discussion ([#mathlib4 > Narrowing the scope of `linear_combination` @ 💬](https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/Narrowing.20the.20scope.20of.20.60linear_combination.60/near/470237816)) was to wait, and "revisit this once people have experienced the various tactics in practice".
One year later, the old tactic has almost no uses: it is unused in mathlib; [searching on github](https://github.com/search?q=linear_combination%27%20path%3A*.lean&type=code) yields 37 hits --- all of which are in various forks of mathlib. Thus, removing this tactic seems appropriate.
---
Do not merge before the zulip discussion has concluded!
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[](https://gitpod.io/from-referrer/)
|
merge-conflict
file-removed
awaiting-zulip
|
0/564 |
Mathlib.lean,Mathlib/Tactic.lean,Mathlib/Tactic/LinearCombination'.lean,Mathlib/Tactic/Linter/UnusedTactic.lean,MathlibTest/linear_combination'.lean |
5 |
4 |
['euprunin', 'github-actions', 'grunweg', 'mathlib4-merge-conflict-bot'] |
nobody |
296-33693 9 months ago |
347-65490 347 days ago |
0-1 1 second |
| 30150 |
imbrem author:imbrem |
feat(CategoryTheory/Monoidal): to_additive for MonoidalCategory |
Add `AddMonoidalCategory`, the additive version of `MonoidalCategory`.
To get this to work, I needed to _remove_ the `to_additive` attributes in `Discrete.lean`, since existing code relies on the `AddMonoid M → MonoidalCategory M` instance. For now, we simply implement the additive variants by hand instead.
---
As discussed in #28718; I added an `AddMonoidalCategory` struct and tagged `MonoidalCategory` with `to_additive`, along with the lemmas in `Category.lean`.
I think this is the right approach, since under this framework the "correct" additive version of `Discrete.lean` would be mapping an `AddMonoid` to an `AddMonoidalCategory`.
Next steps would be to:
- Make `monoidal_coherence` and `coherence` support `AddMonoidalCategory`
- Add `CocartesianMonoidalCategory` extending `AddMonoidalCategory`
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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 |
268-44567 8 months ago |
308-23233 308 days ago |
1-160 1 day |
| 15651 |
TpmKranz author:TpmKranz |
feat(Computability/NFA): operations for Thompson's construction |
Lays the groundwork for a proof of equivalence of RE and NFA, w.r.t. described language. Actual connection to REs comes later, after the groundwork for the opposite direction has been laid.
Third chunk of #12648
---
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[](https://gitpod.io/from-referrer/)
|
new-contributor
t-computability
merge-conflict
awaiting-author
awaiting-zulip
|
307/5 |
Mathlib/Computability/NFA.lean |
1 |
27 |
['TpmKranz', 'YaelDillies', 'dupuisf', 'github-actions', 'leanprover-community-bot-assistant', 'meithecatte', 'rudynicolop'] |
nobody |
263-61699 8 months ago |
683-2687 683 days ago |
45-84611 45 days |
| 15649 |
TpmKranz author:TpmKranz |
feat(Computability): introduce Generalised NFA as bridge to Regular Expression |
Lays the groundwork for a proof of equivalence of NFA and RE, w.r.t. described language. Actual connection to NFA comes later, after the groundwork for the opposite direction has been laid.
Second chunk of #12648
---
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[](https://gitpod.io/from-referrer/)
|
new-contributor
t-computability
merge-conflict
awaiting-author
awaiting-zulip
|
298/0 |
Mathlib.lean,Mathlib/Computability/GNFA.lean,Mathlib/Computability/Language.lean,Mathlib/Computability/RegularExpressions.lean,docs/references.bib |
5 |
7 |
['github-actions', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot', 'meithecatte', 'trivial1711'] |
nobody |
262-77940 8 months ago |
608-41470 608 days ago |
23-54870 23 days |
| 20648 |
anthonyde author:anthonyde |
feat: formalize regular expression -> εNFA |
The file `Computability/RegularExpressionsToEpsilonNFA.lean` contains a formal definition of Thompson's method for constructing an `εNFA` from a `RegularExpression` and a proof of its correctness.
---
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- [x] depends on: #20645
[](https://gitpod.io/from-referrer/)
|
merge-conflict
t-computability
awaiting-zulip
new-contributor
|
490/0 |
Mathlib.lean,Mathlib/Computability/RegularExpressionsToEpsilonNFA.lean,docs/references.bib |
3 |
7 |
['anthonyde', 'github-actions', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot', 'meithecatte', 'qawbecrdtey'] |
nobody |
262-28708 8 months ago |
459-61637 459 days ago |
75-77754 75 days |
| 11800 |
JADekker author:JADekker |
feat: KappaLindelöf spaces |
Define KappaLindelöf spaces by following the first one-third of the API for Lindelöf spaces. The remainder will be added in a future PR.
---
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|
please-adopt
merge-conflict
t-topology
awaiting-zulip
|
301/2 |
Mathlib.lean,Mathlib/Topology/Compactness/KappaLindelof.lean,Mathlib/Topology/Compactness/Lindelof.lean |
3 |
38 |
['ADedecker', 'JADekker', 'PatrickMassot', 'StevenClontz', 'adomani', 'github-actions', 'grunweg', 'kim-em', 'urkud'] |
nobody |
262-574 8 months ago |
737-20856 737 days ago |
123-25636 123 days |
| 33368 |
urkud author:urkud |
feat: define `Complex.UnitDisc.shift` |
Also review the existing API
UPD: I'm going to define a `PSL(2, Real)` action instead.
---
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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 |
213-37133 7 months ago |
213-83866 213 days ago |
7-33574 7 days |
| 20238 |
maemre author:maemre |
feat(Computability/DFA): Closure of regular languages under some set operations |
This shows that regular languages are closed under complement and intersection by constructing DFAs for them.
---
Closure under all other operations will be proved when someone adds the proof for DFA<->regular expression equivalence, so they are not part of this PR.
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|
new-contributor
t-computability
merge-conflict
awaiting-author
awaiting-zulip
|
159/0 |
Mathlib/Computability/DFA.lean,Mathlib/Computability/Language.lean |
2 |
60 |
['EtienneC30', 'YaelDillies', 'github-actions', 'maemre', 'mathlib4-merge-conflict-bot', 'meithecatte', 'urkud'] |
nobody |
163-21942 5 months ago |
508-86281 508 days ago |
48-67492 48 days |
| 22361 |
rudynicolop author:rudynicolop |
feat(Computability/NFA): nfa closure properties |
Add the closure properties union, intersection and reversal for NFA.
---
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|
new-contributor
t-computability
merge-conflict
awaiting-author
awaiting-zulip
|
218/2 |
Mathlib/Computability/Language.lean,Mathlib/Computability/NFA.lean |
2 |
91 |
['EtienneC30', 'b-mehta', 'ctchou', 'github-actions', 'leanprover-community-bot-assistant', 'meithecatte', 'rudynicolop'] |
nobody |
163-21926 5 months ago |
460-3820 460 days ago |
39-60738 39 days |
| 23929 |
meithecatte author:meithecatte |
feat(Computability/NFA): improve bound on pumping lemma |
---
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[](https://gitpod.io/from-referrer/)
|
t-computability
awaiting-zulip
new-contributor
awaiting-author
|
101/10 |
Mathlib/Computability/EpsilonNFA.lean,Mathlib/Computability/NFA.lean |
2 |
42 |
['YaelDillies', 'dagurtomas', 'github-actions', 'leanprover-community-bot-assistant', 'mathlib4-dependent-issues-bot', 'meithecatte'] |
nobody |
162-41955 5 months ago |
426-71254 426 days ago |
34-10092 34 days |
| 35524 |
grunweg author:grunweg |
feat: text-based linter against \t followed by tactic mode |
Wait for the zulip discussion to converge. **If** there is consensus in favour of this change, summarise the motivation here.
[zulip discuss](https://leanprover.zulipchat.com/#narrow/channel/345428-mathlib-reviewers/topic/proposal.3A.20no.20more.20use.20of.20.60.E2.96.B8.60.20in.20Mathlib.3F/with/574680826)
---
There are currently 80 remaining exceptions in mathlib: ideally, these would get fixed before merging this.
Works best when combined with #35523.
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|
t-linter
awaiting-zulip
merge-conflict
|
23/2 |
Mathlib/Tactic/Linter/TextBased.lean |
1 |
5 |
['github-actions', 'grunweg', 'joneugster', 'mathlib-merge-conflicts', 'vihdzp'] |
nobody |
143-59707 4 months ago |
170-20869 170 days ago |
0-187 3 minutes |
| 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 |
138-32111 4 months ago |
141-18851 141 days ago |
0-10825 3 hours |
| 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 |
134-42586 4 months ago |
168-63104 168 days ago |
0-18707 5 hours |
| 30750 |
SnirBroshi author:SnirBroshi |
feat(Data/Quot): `toSet` and `equivClassOf` |
Define `toSet` which gets the set corresponding to an element of a quotient, and `equivClassOf` which gets the equivalence class of an element under a quotient.
---
I found these definitions helpful when working with quotients, specifically `ConnectedComponents` of a `TopologicalSpace`.
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|
t-data
awaiting-author
awaiting-zulip
|
162/0 |
Mathlib/Data/Quot.lean,Mathlib/Data/Set/Image.lean,Mathlib/Data/SetLike/Basic.lean,Mathlib/Data/Setoid/Basic.lean |
4 |
8 |
['SnirBroshi', 'TwoFX', 'eric-wieser', 'github-actions', 'mathlib-merge-conflicts', 'wrenna-robson'] |
TwoFX assignee:TwoFX |
116-14095 3 months ago |
254-27496 254 days ago |
35-84279 35 days |
| 26299 |
adomani author:adomani |
perf: the `whitespace` linter only acts on modified files |
Introduces an `IO.Ref` to allow the `commandStart` linter to only run on files that git considers modified with respect to `master`.
The linter is also active on files that have had some error, as these are likely being modified!
The PR should also mitigate the speed-up that the linter introduced:
[#mathlib4 > A whitespace linter @ 💬](https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/A.20whitespace.20linter/near/525091877)
Assuming that this goes well, a similar mechanism could be applied to several linters that do not need to run on all code, just on the modified code.
Implementation detail: the linter is currently either on or off in "whole" files. It may be also a future development to make this more granular and only run the linter on "modifed commands in modified files", but this is not currently the plan for this modification!
---
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|
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 |
113-32810 3 months ago |
344-23888 344 days ago |
66-73556 66 days |
| 34963 |
Parcly-Taxel author:Parcly-Taxel |
feat(Archive): proof of the Robbins conjecture |
Cf. [#mathlib4 > Alternative axiomatization of boolean algebras @ 💬](https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/Alternative.20axiomatization.20of.20boolean.20algebras/near/558900960) and #31924. |
t-algebra
awaiting-zulip
label:t-algebra$ |
610/0 |
Archive.lean,Archive/Robbins.lean |
2 |
2 |
['chrisflav', 'github-actions'] |
chrisflav assignee:chrisflav |
109-80371 3 months ago |
109-80371 109 days ago |
71-52828 71 days |
| 32742 |
LTolDe author:LTolDe |
feat(MeasureTheory/Constructions/Polish/Basic): add class SuslinSpace |
add new class `SuslinSpace` for a topological space that is an analytic set in itself
This will be useful to prove the **Effros Theorem**, see [zulip thread](https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/Effros.20Theorem/with/558712441).
---
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|
new-contributor
awaiting-zulip
t-measure-probability
awaiting-author
|
4/0 |
Mathlib/MeasureTheory/Constructions/Polish/Basic.lean |
1 |
10 |
['ADedecker', 'LTolDe', 'dagurtomas', 'dupuisf', 'github-actions', 'jcommelin'] |
PatrickMassot assignee:PatrickMassot |
92-67927 3 months ago |
214-928 214 days ago |
11-7507 11 days |
| 32608 |
PrParadoxy author:PrParadoxy |
feat(LinearAlgebra/PiTensorProduct): API for PiTensorProducts indexed by sets |
This PR addresses a TODO item in LinearAlgebra/PiTensorProduct.lean:
* API for the various ways ι can be split into subsets; connect this
with the binary tensor product
-- specifically by describing tensors of type ⨂ (i : S), M i, for S : Set ι.
Our primary motivation is to formalise the notion of "restricted tensor
products". This will be the content of a follow-up PR.
Beyond that, the Set API is natural in contexts where the index type has
an independent interpretation. An example is quantum physics, where ι
ranges over distinguishable degrees of freedom, and where its is common
practice to annotate objects by the set of indices they are defined on.
---
Stub file with preliminary definition of the restricted tensor product as a direct limit of tensors indexed by finite subsets of an index type:
https://github.com/PrParadoxy/mathlib4/blob/restricted-stub/Mathlib/LinearAlgebra/PiTensorProduct/Restricted.lean
---
- [x] depends on: #32598
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new-contributor
awaiting-zulip
t-algebra
WIP
merge-conflict
label:t-algebra$ |
300/2 |
Mathlib.lean,Mathlib/LinearAlgebra/PiTensorProduct.lean,Mathlib/LinearAlgebra/PiTensorProduct/Set.lean |
3 |
32 |
['PrParadoxy', 'dagurtomas', 'eric-wieser', 'github-actions', 'goliath-klein', 'leanprover-radar', 'mathlib-merge-conflicts', 'mathlib4-dependent-issues-bot', 'mathlib4-merge-conflict-bot'] |
nobody |
49-64585 1 month ago |
228-80293 228 days ago |
10-66980 10 days |
| 33031 |
chiyunhsu author:chiyunhsu |
feat(Combinatorics/Enumerative/Partition): add combinatorial proof of Euler's partition theorem |
The new file EulerComb.lean contains the combinatorial proof of Euler's partition theorem. The analytic proof of the theorem and its generalization of Glaisher's Theorem has already been formalized in [Glaisher.lean](https://github.com/leanprover-community/mathlib4/blob/master/Mathlib/Combinatorics/Enumerative/Partition/Glaisher.lean). The generalization of the combinatorial proof from this file to Glaisher's Theorem is within reach.
---
Zulip discussion: [#mathlib4 > Glaisher’s Bijection on integer partitions](https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/Glaisher.E2.80.99s.20Bijection.20on.20integer.20partitions/with/570808111)
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|
t-combinatorics
new-contributor
awaiting-zulip
|
531/0 |
Mathlib.lean,Mathlib/Combinatorics/Enumerative/Partition/EulerComb.lean |
2 |
8 |
['chiyunhsu', 'dagurtomas', 'github-actions', 'tb65536', 'vihdzp'] |
b-mehta assignee:b-mehta |
43-64266 1 month ago |
191-4386 191 days ago |
42-22427 42 days |
| 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.
---
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|
t-algebra
awaiting-zulip
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 |
2 |
['github-actions', 'themathqueen'] |
themathqueen assignee:themathqueen |
41-14999 1 month ago |
41-14999 41 days ago |
29-68789 29 days |
| 39233 |
wrenna-robson author:wrenna-robson |
feat: `Pi.map` rename to `Function.map` |
This PR renames `Pi.map` to `Function.map` and makes the changes necessary to support this. In particular this means that Mathlib.Logic.Function.Defs now only contains the Function namespace.
A future PR may update the names of *.piMap in line with this.
Zulip thread: [#PR reviews > #39233 - rename Pi.map to Function.map @ 💬](https://leanprover.zulipchat.com/#narrow/channel/144837-PR-reviews/topic/.2339233.20-.20rename.20Pi.2Emap.20to.20Function.2Emap/near/594605689)
General discussion regarding the Pi namespace: https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/The.20Pi.20namespace/near/594782721
---
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|
awaiting-zulip |
130/121 |
Mathlib/Algebra/Category/Grp/AB.lean,Mathlib/Algebra/Notation/Pi/Defs.lean,Mathlib/Algebra/Order/Antidiag/Nat.lean,Mathlib/Algebra/Regular/Pi.lean,Mathlib/Analysis/InnerProductSpace/Coalgebra.lean,Mathlib/Analysis/SpecialFunctions/PolarCoord.lean,Mathlib/Condensed/Discrete/LocallyConstant.lean,Mathlib/Control/Bifunctor.lean,Mathlib/Data/Finset/Powerset.lean,Mathlib/Data/Prod/Basic.lean,Mathlib/Data/Set/Prod.lean,Mathlib/Dynamics/Ergodic/MeasurePreserving.lean,Mathlib/Dynamics/PeriodicPts/Defs.lean,Mathlib/Dynamics/PeriodicPts/Lemmas.lean,Mathlib/Dynamics/TopologicalEntropy/Semiconj.lean,Mathlib/FieldTheory/Perfect.lean,Mathlib/Geometry/Manifold/IsManifold/Basic.lean,Mathlib/Geometry/Manifold/IsManifold/ExtChartAt.lean,Mathlib/GroupTheory/MonoidLocalization/Lemmas.lean,Mathlib/LinearAlgebra/Multilinear/Basis.lean,Mathlib/LinearAlgebra/Pi.lean,Mathlib/Logic/Equiv/Basic.lean,Mathlib/Logic/Equiv/PartialEquiv.lean,Mathlib/Logic/Function/Basic.lean,Mathlib/Logic/Function/Defs.lean,Mathlib/Logic/Function/Iterate.lean,Mathlib/Order/Filter/Cofinite.lean,Mathlib/Order/Filter/Pi.lean,Mathlib/RingTheory/Coalgebra/Basic.lean,Mathlib/Topology/Algebra/FilterBasis.lean,Mathlib/Topology/Algebra/Module/ContinuousLinearMap/PiProd.lean,Mathlib/Topology/Algebra/RestrictedProduct/TopologicalSpace.lean,Mathlib/Topology/Constructions.lean,Mathlib/Topology/Maps/Basic.lean,Mathlib/Topology/MetricSpace/HausdorffAlexandroff.lean,Mathlib/Topology/MetricSpace/Isometry.lean,Mathlib/Topology/NhdsWithin.lean |
37 |
5 |
['github-actions', 'mathlib-merge-conflicts', 'themathqueen', 'wrenna-robson'] |
nobody |
40-20881 1 month ago |
88-7 87 days ago |
0-7302 2 hours |
| 37346 |
euprunin author:euprunin |
chore: golf using `grind` |
The goal of this PR is to decrease the number of times lemmas are called explicitly. Any decrease in compilation time is a welcome side effect, although it is not a primary objective.
Trace profiling results (differences <30 ms considered measurement noise):
* `✅️ SimpleGraph.Walk.IsPath.getVert_injOn`: unchanged 🎉
* `✅️ SimpleGraph.Walk.length_bypass_le`: unchanged 🎉
* `✅️ Rat.floor_intCast_div_natCast`: unchanged 🎉
* `✅️ InnerProductGeometry.norm_eq_of_angle_sub_eq_angle_sub_rev_of_angle_ne_pi`: unchanged 🎉
* `✅️ padicNorm.zero_of_padicNorm_eq_zero`: unchanged 🎉
Profiled using `set_option trace.profiler true in`.
---
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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 |
37-84867 1 month ago |
101-12915 101 days ago |
30-49603 30 days |
| 39311 |
felixpernegger author:felixpernegger |
refactor: redefine `eLpNorm` at `p = 0` |
For Zulip discussion see https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/eLpNorm.20junk.20value/with/576356442. In partuclar this change is suggestion 2 in [#mathlib4 > eLpNorm junk value @ 💬](https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/eLpNorm.20junk.20value/near/576340531)
This redefined [MeasureTheory.eLpNorm](https://leanprover-community.github.io/mathlib4_docs/Mathlib/MeasureTheory/Function/LpSeminorm/Defs.html#MeasureTheory.eLpNorm) at `p = 0`. Previously it was always `0` but now it is the measure of the support of the function (technical detail: In order to avoid having to add additional arguments to `eLpNorm`, we define it as the measure of the support of the norm of the function, but this is almost always the same)
The motivation for this comes from the counting measure, in particular this then unifies with https://leanprover-community.github.io/mathlib4_docs/Mathlib/Analysis/Normed/Lp/lpSpace.html#Mem%E2%84%93p. In any case, it is "closer" to the actual mathematical definition
Unfortunately, since `eLpNorm` is widely used, the diff is very large and a lot of theorems break (i.e. now require `p != 0`). Oftentimes `p != 0` is still not required (sometimes with nontrivial arguments), I tried to avoid adding extra hypothesis whenever I could but I almost certainly missed some.
There now may also be places where we dont need `p != 0` as a hypothesis anymore (i.e. for `[Memℓp](https://leanprover-community.github.io/mathlib4_docs/Mathlib/Analysis/Normed/Lp/lpSpace.html#Mem%E2%84%93p)`), but this is not included in this PR.
---
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awaiting-zulip
merge-conflict
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 |
29-11200 29 days ago |
64-8828 64 days ago |
5-67427 5 days |
| 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 |
24-26496 24 days ago |
43-4493 43 days ago |
2-10191 2 days |
| 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 |
22-49953 22 days ago |
67-12246 67 days ago |
1-10686 1 day |
| 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 |
15-24025 15 days ago |
15-24025 15 days ago |
73-19357 73 days |
| 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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|
tech debt
awaiting-author
awaiting-zulip
|
20/20 |
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/MeasureTheory/Function/UnifTight.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 |
18 |
6 |
['Vierkantor', 'felixpernegger', 'github-actions', 'leanprover-radar'] |
nobody |
15-22368 15 days ago |
15-22382 15 days ago |
1-66762 1 day |
| 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 |
14-26958 14 days ago |
14-84881 14 days ago |
0-4355 1 hour |
| 38546 |
yhx-12243 author:yhx-12243 |
fix(Algebra/Module/Injective): changing the universe from the module's to the ring's |
Change the definition of
```lean
class Module.Injective : Prop where
out : ∀ ⦃X Y : Type v⦄ [AddCommGroup X] [AddCommGroup Y] [Module R X] [Module R Y]
(f : X →ₗ[R] Y) (_ : Function.Injective f) (g : X →ₗ[R] Q),
∃ h : Y →ₗ[R] Q, ∀ x, h (f x) = g x
```
into
```lean
class Module.Injective : Prop where
out : ∀ ⦃X Y : Type u⦄ [AddCommGroup X] [AddCommGroup Y] [Module R X] [Module R Y]
(f : X →ₗ[R] Y) (_ : Function.Injective f) (g : X →ₗ[R] Q),
∃ h : Y →ₗ[R] Q, ∀ x, h (f x) = g x
```
where `u` is the universe of ring, `v` is the universe of module,
to make it agree with `Module.Baer` and real mathematical definition, **without universe issues** (make the theorem [`Module.Baer.of_injective`](https://leanprover-community.github.io/mathlib4_docs/Mathlib/Algebra/Module/Injective.html#Module.Baer.of_injective) not require `Small.{v, u} R` issue).
This type of adaption also appeared in the criterion `Module.Flat`, which also uses `Type u` on testing modules.
See discussions in https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/Universe.20issue.20about.20injective.20module .
---
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|
t-algebra
new-contributor
awaiting-zulip
awaiting-author
label:t-algebra$ |
57/43 |
Mathlib/Algebra/Category/ModuleCat/Injective.lean,Mathlib/Algebra/Category/ModuleCat/Ulift.lean,Mathlib/Algebra/Module/Injective.lean,Mathlib/RepresentationTheory/FinGroupCharZero.lean,Mathlib/RingTheory/Flat/Tensor.lean,Mathlib/RingTheory/LocalProperties/Injective.lean |
6 |
11 |
['eric-wieser', 'github-actions', 'grunweg', 'mathlib-bors', 'wwylele', 'yhx-12243'] |
nobody |
12-8169 12 days ago |
103-67071 103 days ago |
0-26133 7 hours |
| 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 |
1-46681 1 day ago |
293-37673 293 days ago |
0-81 1 minute |
| 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 |
| 41200 |
joelriou author:joelriou |
feat(CategoryTheory/Presentable): pure morphisms |
In this PR, we define the notion of `κ`-pure morphisms (`IsCardinalPure`) in a category `C`. This class contains split monomorphisms and is stable under `κ`-filtered colimits. When `C` is a `κ`-accessible category, we show that `κ`-pure morphisms are monomorphisms.
---
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- Nat.bit1_add_bit1
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|
t-category-theory
tech debt
|
187/6 |
Mathlib.lean,Mathlib/CategoryTheory/Presentable/Basic.lean,Mathlib/CategoryTheory/Presentable/CardinalPure.lean |
3 |
16 |
['github-actions', 'joelriou', 'smorel394'] |
nobody |
23-2554 23 days ago |
35-12140 35 days ago |
38-65999 38 days |
| 41542 |
tb65536 author:tb65536 |
refactor(AlgebraicGeometry/Sites/Small): golf and remove some `backward.isDefEq.respectTransparency` |
This PR golfs and removes some `backward.isDefEq.respectTransparency`. Some proofs with the help of Claude, with further golfing by myself.
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|
t-category-theory
tech debt
LLM-generated
|
58/134 |
Mathlib/AlgebraicGeometry/Sites/Small.lean,Mathlib/CategoryTheory/Sites/Over.lean |
2 |
2 |
['github-actions', 'mathlib-merge-conflicts'] |
nobody |
22-71230 22 days ago |
24-51782 24 days ago |
29-69542 29 days |
| 41427 |
YaelDillies author:YaelDillies |
refactor(Algebra/MvPolynomial): delete `coeff` |
... without a deprecation because we want dot notation to resolve to `AddMonoidAlgebra.coeff`.
For migration, replace bare `MvPolynomial.coeff`s with `AddMonoidAlgebra.coeff`. Dot notation `.coeff` will resolve to `AddMonoidAlgebra.coeff` without further change. `MvPolynomial.coeff m p` corresponds to `AddMonoidAlgebra.coeff p m`, so you will need to swap arguments. Note further that `AddMonoidAlgebra.coeff p` is bundled as a `Finsupp` while `MvPolynomial.coeff` is a bare function.
---
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|
tech debt
t-algebra
label:t-algebra$ |
243/245 |
Mathlib/Algebra/MvPolynomial/Basic.lean,Mathlib/Algebra/MvPolynomial/Coeff.lean,Mathlib/Algebra/MvPolynomial/CommRing.lean,Mathlib/Algebra/MvPolynomial/Degrees.lean,Mathlib/Algebra/MvPolynomial/Division.lean,Mathlib/Algebra/MvPolynomial/Equiv.lean,Mathlib/Algebra/MvPolynomial/Eval.lean,Mathlib/Algebra/MvPolynomial/Funext.lean,Mathlib/Algebra/MvPolynomial/Monad.lean,Mathlib/Algebra/MvPolynomial/Nilpotent.lean,Mathlib/Algebra/MvPolynomial/NoZeroDivisors.lean,Mathlib/Algebra/MvPolynomial/PDeriv.lean,Mathlib/Algebra/MvPolynomial/Rename.lean,Mathlib/Algebra/MvPolynomial/Variables.lean,Mathlib/Combinatorics/Nullstellensatz.lean,Mathlib/FieldTheory/AxGrothendieck.lean,Mathlib/FieldTheory/SeparablyGenerated.lean,Mathlib/NumberTheory/Height/MvPolynomial.lean,Mathlib/RingTheory/Extension/Generators.lean,Mathlib/RingTheory/Extension/Presentation/Basic.lean,Mathlib/RingTheory/MvPolynomial/Basic.lean,Mathlib/RingTheory/MvPolynomial/FreeCommRing.lean,Mathlib/RingTheory/MvPolynomial/Groebner.lean,Mathlib/RingTheory/MvPolynomial/Homogeneous.lean,Mathlib/RingTheory/MvPolynomial/IrreducibleQuadratic.lean,Mathlib/RingTheory/MvPolynomial/MonomialOrder.lean,Mathlib/RingTheory/MvPolynomial/WeightedHomogeneous.lean,Mathlib/RingTheory/MvPowerSeries/Basic.lean,Mathlib/RingTheory/MvPowerSeries/Trunc.lean,Mathlib/RingTheory/NoetherNormalization.lean,Mathlib/RingTheory/Polynomial/Basic.lean,Mathlib/RingTheory/Polynomial/IsIntegral.lean,Mathlib/RingTheory/Polynomial/Quotient.lean,Mathlib/RingTheory/Spectrum/Prime/Polynomial.lean,Mathlib/RingTheory/TensorProduct/MvPolynomial.lean |
35 |
11 |
['YaelDillies', 'eric-wieser', 'github-actions', 'mathlib-merge-conflicts', 'mathlib-splicebot'] |
nobody |
22-36809 22 days ago |
22-38313 22 days ago |
31-8262 31 days |
| 41864 |
kebekus author:kebekus |
feat: estimate for logarithmic counting functions |
In preparation to the proof of the "Lemma of Logarithmic Derivatives" of Value Distribution Theory, establish the standard "Counting Estimate" for the logarithmic counting function. Simplify and streamline the API for restrictions of divisors a little.
This material is used in [Project VD](https://github.com/kebekus/ProjectVD), formalizing Value Distribution Theory for meromorphic functions on the complex plane. Claude Code was used to create this PR.
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|
t-topology
tech debt
LLM-generated
|
124/15 |
Mathlib/Analysis/Complex/ValueDistribution/FirstMainTheorem.lean,Mathlib/Analysis/Complex/ValueDistribution/LogCounting/Basic.lean,Mathlib/Topology/LocallyFinsupp.lean |
3 |
1 |
['github-actions'] |
nobody |
21-76304 21 days ago |
21-76304 21 days ago |
21-76080 21 days |
| 40648 |
felixpernegger author:felixpernegger |
chore(MeasureTheory/MeasurableSpace/Constructions): remove some defeq abuse |
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|
tech debt |
7/2 |
Mathlib/MeasureTheory/MeasurableSpace/Constructions.lean,Mathlib/Order/Disjointed.lean |
2 |
2 |
['github-actions', 'wwylele'] |
nobody |
18-52588 18 days ago |
53-52207 53 days ago |
53-52001 53 days |
| 41981 |
YaelDillies author:YaelDillies |
refactor(Algebra/Polynomial): make into an `abbrev` of `AddMonoidAlgebra` |
... and deprecate the declarations that are now tautological (`toFinsupp`/`ofFinsupp` 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$ |
337/538 |
Mathlib/Algebra/MonoidAlgebra/MapDomain.lean,Mathlib/Algebra/MonoidAlgebra/Support.lean,Mathlib/Algebra/Polynomial/AlgebraMap.lean,Mathlib/Algebra/Polynomial/Basic.lean,Mathlib/Algebra/Polynomial/Basis.lean,Mathlib/Algebra/Polynomial/Cardinal.lean,Mathlib/Algebra/Polynomial/Coeff.lean,Mathlib/Algebra/Polynomial/Degree/Defs.lean,Mathlib/Algebra/Polynomial/Degree/IsMonicOfDegree.lean,Mathlib/Algebra/Polynomial/Degree/Operations.lean,Mathlib/Algebra/Polynomial/Degree/Support.lean,Mathlib/Algebra/Polynomial/Derivative.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/Inductions.lean,Mathlib/Algebra/Polynomial/Laurent.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/Splits.lean,Mathlib/Algebra/Polynomial/UnitTrinomial.lean,Mathlib/Algebra/Ring/Subring/IntPolynomial.lean,Mathlib/FieldTheory/SeparablyGenerated.lean,Mathlib/LinearAlgebra/Finsupp/VectorSpace.lean,Mathlib/LinearAlgebra/Lagrange.lean,Mathlib/RingTheory/IsAdjoinRoot.lean,Mathlib/RingTheory/KrullDimension/Polynomial.lean,Mathlib/RingTheory/Polynomial/Basic.lean,Mathlib/RingTheory/Polynomial/Opposites.lean,Mathlib/RingTheory/PowerBasis.lean,Mathlib/RingTheory/PowerSeries/Derivative.lean,Mathlib/RingTheory/Spectrum/Prime/Topology.lean,Mathlib/RingTheory/ZariskisMainTheorem.lean,Mathlib/Tactic/ReduceModChar.lean,MathlibTest/InstanceDiamonds.lean |
40 |
8 |
['NoahW314', 'YaelDillies', 'github-actions', 'leanprover-radar', 'tb65536'] |
nobody |
15-31991 15 days ago |
17-38828 17 days ago |
17-41101 17 days |
| 39808 |
chenson2018 author:chenson2018 |
chore(Data): 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.
Most of these are fixed by squeezing the call to `grind` and unsetting `linter.tacticAnalysis.verifyGrindOnly` so they no longer appear in the weekly report. Unfortunately, this can't be on by default for performance reasons, but I highly encourage using this linter when adding any `grind` proofs.
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|
t-data
tech debt
|
69/41 |
Mathlib/Data/Bool/Basic.lean,Mathlib/Data/Bool/Set.lean,Mathlib/Data/EReal/Operations.lean,Mathlib/Data/Fin/Tuple/NatAntidiagonal.lean,Mathlib/Data/Finset/Image.lean,Mathlib/Data/Finset/Powerset.lean,Mathlib/Data/Finset/Range.lean,Mathlib/Data/Finset/SMulAntidiagonal.lean,Mathlib/Data/List/Basic.lean,Mathlib/Data/List/Chain.lean,Mathlib/Data/List/Count.lean,Mathlib/Data/List/Cycle.lean,Mathlib/Data/List/Induction.lean,Mathlib/Data/List/ReduceOption.lean,Mathlib/Data/List/Sigma.lean,Mathlib/Data/List/Sort.lean,Mathlib/Data/List/TakeDrop.lean,Mathlib/Data/List/Triplewise.lean,Mathlib/Data/Option/Basic.lean,Mathlib/Data/Set/Card.lean,Mathlib/Data/Set/Disjoint.lean,Mathlib/Data/Set/Function.lean,Mathlib/Data/Set/Insert.lean,Mathlib/Data/Sum/Order.lean |
24 |
4 |
['Vierkantor', 'chenson2018', 'github-actions'] |
nobody |
15-23303 15 days ago |
75-37932 75 days ago |
75-37708 75 days |
| 41903 |
felixpernegger author:felixpernegger |
chore: simplify proofs with `grind` |
These all come from the [weekly linting log](https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/Weekly.20linting.20log) "Info messages count".
Note that that counter has two false positives which arise due to "all_goals". These are not included here obviously, but all others are (can undo some if they seriously hurt performance).
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|
tech debt |
10/40 |
Mathlib/Algebra/Polynomial/RuleOfSigns.lean,Mathlib/AlgebraicTopology/SimplexCategory/ToMkOne.lean,Mathlib/Analysis/Calculus/Taylor.lean,Mathlib/Analysis/Complex/JensenFormula.lean,Mathlib/Analysis/Convex/MetricSpace.lean,Mathlib/Analysis/SpecialFunctions/Stirling.lean,Mathlib/Combinatorics/Hypergraph/Basic.lean,Mathlib/Data/List/Defs.lean,Mathlib/LinearAlgebra/AffineSpace/Simplex/Basic.lean,Mathlib/MeasureTheory/MeasurableSpace/Defs.lean,Mathlib/MeasureTheory/Measure/Restrict.lean,Mathlib/MeasureTheory/SetSemiring.lean,Mathlib/NumberTheory/LucasLehmer.lean,Mathlib/Order/CountableSupClosed.lean,Mathlib/Probability/Moments/SubGaussian.lean,Mathlib/Probability/Process/LocalProperty.lean,Mathlib/RingTheory/MvPowerSeries/GaussNorm.lean,Mathlib/Topology/Order/Basic.lean |
18 |
11 |
['Vierkantor', 'felixpernegger', 'github-actions', 'leanprover-radar', 'vlad902'] |
nobody |
15-10643 15 days ago |
20-72843 20 days ago |
20-72638 20 days |
| 41457 |
NoahW314 author:NoahW314 |
feat(Algebra/Group/Units/Basic): deduplicate lemmas by generalizing to `IsDedekindFiniteMonoid` |
Generalize a group of lemmas to `IsDedekindFiniteMonoid` which previously had versions for `CommMonoid`, `LeftCancelMonoid`, `RightCancelMonoid`, `CancelMonoid`, and `Ordinal`.
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t-algebra
tech debt
label:t-algebra$ |
30/86 |
Mathlib/Algebra/AffineMonoid/Irreducible.lean,Mathlib/Algebra/Group/Units/Basic.lean,Mathlib/AlgebraicTopology/SimplicialSet/Horn.lean,Mathlib/Combinatorics/Enumerative/DyckWord.lean,Mathlib/SetTheory/Ordinal/Arithmetic.lean,Mathlib/SetTheory/Ordinal/Exponential.lean,scripts/nolints_prime_decls.txt |
7 |
4 |
['NoahW314', 'Vierkantor', 'github-actions', 'mathlib-merge-conflicts'] |
nobody |
15-9075 15 days ago |
15-9075 15 days ago |
31-49420 31 days |
| 39807 |
vihdzp author:vihdzp |
feat: universe-heterogeneous cardinal equality |
We introduce a predicate `LiftEq a b`, with notation `a =ₗ b`, which states that two cardinals (in different universes) are equal. This serves as a single canonical spelling for `lift.{v} a = lift.{u} b` and similar incantations.
Future PRs will introduce the analogous predicates for `<` and `≤`, and a notation typeclass so the notation can be reused for `Ordinal` and `OrderType`.
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|
t-set-theory
tech debt
|
316/149 |
Mathlib/CategoryTheory/Abelian/GrothendieckCategory/EnoughInjectives.lean,Mathlib/FieldTheory/IsAlgClosed/Classification.lean,Mathlib/LinearAlgebra/Dimension/Basic.lean,Mathlib/LinearAlgebra/Dimension/Constructions.lean,Mathlib/LinearAlgebra/Dimension/Free.lean,Mathlib/LinearAlgebra/Dimension/FreeAndStrongRankCondition.lean,Mathlib/LinearAlgebra/Dimension/LinearMap.lean,Mathlib/LinearAlgebra/Dimension/StrongRankCondition.lean,Mathlib/ModelTheory/Basic.lean,Mathlib/ModelTheory/Satisfiability.lean,Mathlib/RingTheory/AlgebraicIndependent/Basic.lean,Mathlib/RingTheory/AlgebraicIndependent/RankAndCardinality.lean,Mathlib/RingTheory/AlgebraicIndependent/TranscendenceBasis.lean,Mathlib/RingTheory/LinearDisjoint.lean,Mathlib/RingTheory/Localization/Cardinality.lean,Mathlib/SetTheory/Cardinal/Aleph.lean,Mathlib/SetTheory/Cardinal/Arithmetic.lean,Mathlib/SetTheory/Cardinal/Basic.lean,Mathlib/SetTheory/Cardinal/Defs.lean,Mathlib/SetTheory/Cardinal/ENat.lean,Mathlib/SetTheory/Cardinal/Order.lean,Mathlib/SetTheory/Cardinal/ToNat.lean,Mathlib/SetTheory/Ordinal/Univ.lean,Mathlib/SetTheory/ZFC/Cardinal.lean |
24 |
3 |
['acmepjz', 'github-actions', 'mathlib-merge-conflicts'] |
alreadydone assignee:alreadydone |
14-50816 14 days ago |
14-52861 14 days ago |
54-42861 54 days |
| 37751 |
JovanGerb author:JovanGerb |
chore(Order/Filter/IsBounded): use `to_dual` |
use `to_dual` for `Filter.IsBounded`
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|
tech debt |
81/227 |
Mathlib/Algebra/Order/Monoid/Unbundled/Basic.lean,Mathlib/Order/Filter/IsBounded.lean |
2 |
4 |
['github-actions', 'mathlib-dependent-issues', 'mathlib-merge-conflicts'] |
nobody |
14-49333 14 days ago |
14-52093 14 days ago |
53-53756 53 days |
| 38200 |
Parcly-Taxel author:Parcly-Taxel |
feat: Turán numbers and their strict monotonicity |
`strictMonoOn_turanNumber` was initially proved by @Aristotle-Harmonic, then hand-polished.
Co-authored-by: Aristotle (Harmonic) <aristotle-harmonic@harmonic.fun> |
t-combinatorics
tech debt
maintainer-merge
|
45/20 |
Mathlib/Combinatorics/SimpleGraph/Extremal/Turan.lean |
1 |
9 |
['Parcly-Taxel', 'YaelDillies', 'github-actions', 'mathlib-merge-conflicts', 'tb65536'] |
nobody |
14-36922 14 days ago |
14-37558 14 days ago |
108-13239 108 days |
| 40725 |
dennj author:dennj |
chore(SetTheory/Ordinal): execute deprecation TODOs |
This PR resolves several ordinal deprecation TODOs by making the `add_one` spelling primary over the older `succ`-spelled theorem names.
It deprecates the old names, rewires Mathlib uses to the new names, and renames `Cardinal.noMaxOrder` to the more precise `Cardinal.noMaxOrder_ord_toType`. The old deprecated names are no longer used internally.
Code clean up in Ordinal.Notation |
t-set-theory
tech debt
|
121/149 |
Mathlib/CategoryTheory/Presentable/Directed.lean,Mathlib/CategoryTheory/Presentable/OrthogonalReflection.lean,Mathlib/CategoryTheory/Presentable/SharplyLT/Basic.lean,Mathlib/CategoryTheory/SmallObject/IsCardinalForSmallObjectArgument.lean,Mathlib/FieldTheory/CardinalEmb.lean,Mathlib/SetTheory/Ordinal/Arithmetic.lean,Mathlib/SetTheory/Ordinal/Basic.lean,Mathlib/SetTheory/Ordinal/Exponential.lean,Mathlib/SetTheory/Ordinal/FixedPoint.lean,Mathlib/SetTheory/Ordinal/Notation.lean,Mathlib/SetTheory/Ordinal/Principal.lean,Mathlib/SetTheory/Ordinal/Univ.lean,Mathlib/SetTheory/Ordinal/Veblen.lean |
13 |
14 |
['dennj', 'github-actions', 'mathlib-merge-conflicts', 'plp127', 'vihdzp'] |
alreadydone assignee:alreadydone |
13-85690 13 days ago |
15-35972 15 days ago |
42-29086 42 days |
| 42091 |
felixpernegger author:felixpernegger |
chore(RingTheory): fix `backward.inferInstanceAs.wrap.data` exception |
I am not sure why this works, but specifying the proof (rather def?) `Ideal.Quotient.algebraQuotientMapQuotient` resolves the necessity of the exception.
The `unfold ResidueField` is not necessarily needed. Also, `infer_instance` etc, does not work even after unfolding.
---
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|
t-ring-theory
tech debt
|
3/2 |
Mathlib/RingTheory/Unramified/LocalRing.lean |
1 |
3 |
['felixpernegger', 'github-actions', 'leanprover-radar'] |
nobody |
13-80559 13 days ago |
13-81270 13 days ago |
13-81061 13 days |
| 42085 |
felixpernegger author:felixpernegger |
chore: remove redundant `backward.inferInstanceAs.wrap.data` exception |
"Redundant" in the sense that `lake build` succeeds without it, so ought to be removable; especially since the exceptions are counted as strong tech debt.
---
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|
t-algebra
tech debt
label:t-algebra$ |
0/1 |
Mathlib/Algebra/Category/MonCat/Limits.lean |
1 |
3 |
['felixpernegger', 'github-actions', 'leanprover-radar'] |
nobody |
13-4418 13 days ago |
14-3725 14 days ago |
14-3501 14 days |
| 41301 |
joelriou author:joelriou |
feat(CategoryTheory): (co)kernels in functor categories/homological complexes |
---
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|
t-category-theory
tech debt
|
95/8 |
Mathlib.lean,Mathlib/Algebra/Homology/HomologicalComplex.lean,Mathlib/Algebra/Homology/HomologicalComplexKernels.lean,Mathlib/CategoryTheory/Limits/FunctorCategory/Shapes/Kernels.lean,Mathlib/CategoryTheory/Limits/Preserves/Shapes/Kernels.lean,Mathlib/CategoryTheory/Limits/Shapes/Kernels.lean |
6 |
1 |
['github-actions'] |
nobody |
12-41796 12 days ago |
37-2806 37 days ago |
37-2582 37 days |
| 40651 |
Scarlett-le author:Scarlett-le |
feat: signed power of a point and dimension-free power-of-a-point converses |
This PR reworks the converse direction of the power of a point in `Mathlib/Geometry/Euclidean/Sphere/Power.lean` to be dimension-free, and adds the converse of the intersecting secants theorem.
Main additions:
* `Sphere.inner_vsub_vsub_eq_power`: the signed power `⟪a -ᵥ p, b -ᵥ p⟫` of a point
`p` on a secant line through `a, b ∈ s` is exactly `s.power p`; this unifies the
chord and secant cases without splitting on the sign.
* `Sphere.mem_of_inner_vsub_vsub_eq_power_of_mem_line`: a one-secant converse.
* `cospherical_of_inner_vsub_eq_inner_vsub`: a dimension-free converse to the power
of a point, stated with the signed invariant.
* `cospherical_of_mul_dist_eq_mul_dist_of_angle_eq_zero`: the converse of the
intersecting secants theorem (new).
Main change:
* `cospherical_of_mul_dist_eq_mul_dist_of_angle_eq_pi` (converse of the intersecting
chords theorem) is reproved via `cospherical_of_inner_vsub_eq_inner_vsub`, going
through the circumsphere of the triangle `{p₁, p₂, p₃}`. It no longer reduces to
the 2D case, so the `[Fact (finrank ℝ V = 2)]` / `[Module.Oriented ℝ V (Fin 2)]`
machinery, the private auxiliary lemma, and the `AffineIsometry` embedding into the
affine span are all removed. The statement is unchanged.
Imports `Mathlib.Geometry.Euclidean.Angle.Sphere` and
`Mathlib.Geometry.Euclidean.Similarity` are dropped; `Mathlib.Geometry.Euclidean.Circumcenter`
is added. |
t-euclidean-geometry
tech debt
|
139/92 |
Mathlib/Geometry/Euclidean/Angle/Unoriented/Affine.lean,Mathlib/Geometry/Euclidean/Sphere/Power.lean |
2 |
2 |
['github-actions', 'mathlib-merge-conflicts'] |
nobody |
11-24827 11 days ago |
11-25397 11 days ago |
11-25194 11 days |
| 42258 |
ScottCarnahan author:ScottCarnahan |
feat(Algebra/Lie/Graded): add graded Lie modules |
This PR defines graded Lie modules over graded Lie algebras. Some existing declarations are changed to be heterogeneous, so they apply to modules in addition to Lie algebras.
---
[](https://gitpod.io/from-referrer/)
|
t-algebra
tech debt
label:t-algebra$ |
50/20 |
Mathlib/Algebra/Lie/Graded.lean |
1 |
1 |
['github-actions'] |
nobody |
9-61134 9 days ago |
9-71401 9 days ago |
9-71177 9 days |
| 40925 |
JovanGerb author:JovanGerb |
chore(CategoryTheory/Functor/Category): don't expose `NatTrans.hcomp` |
This PR hides the definition of `NatTrans.hcomp`, because it has two equally sensible possible definitions. As a result, we can get rid of the `to_dual_insert_cast`. `simps` doesn't work for non-exposed definition, so `hcomp_app` is proved separately, and its dual `hcomp_app'` is added.
Note: some proofs break, because the `dsimp` set changes, due to the definition not being exposed. This is a bit unfortunate. There was some discussion on Zulip about changing `dsimp` for category theory into a simp set, which would fix this problem, because we could then add `hcomp_app` to this set.
---
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|
maintainer-merge
tech debt
|
31/17 |
Mathlib/Algebra/Homology/HomologicalComplex.lean,Mathlib/AlgebraicTopology/DoldKan/NCompGamma.lean,Mathlib/AlgebraicTopology/DoldKan/PInfty.lean,Mathlib/CategoryTheory/Functor/Category.lean,Mathlib/CategoryTheory/Monoidal/Action/End.lean,Mathlib/CategoryTheory/Monoidal/End.lean,Mathlib/CategoryTheory/Triangulated/TStructure/SpectralObject.lean,Mathlib/CategoryTheory/Types/Basic.lean |
8 |
20 |
['JovanGerb', 'github-actions', 'grunweg', 'leanprover-radar', 'mathlib-merge-conflicts', 'riccardobrasca'] |
nobody |
7-64396 7 days ago |
7-65360 7 days ago |
45-34434 45 days |
| 38534 |
AlexeyMilovanov author:AlexeyMilovanov |
refactor(Computability): bundle PFun into a structure with FunLike instance |
This PR refactors `PFun` from `def PFun α β := α → Part β` to a structure with a `FunLike` instance.
[Discussion](https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/Fix.20for.20fun_prop.20on.20PFun.20.28context.3A.20Computability.20Theory.29)
### Main changes
* `PFun` is now a structure with a single field `toFun : α → Part β`.
* Added the `FunLike (α →. β) α (Part β)` instance and `initialize_simps_projections`.
* Added the basic projection/application simp lemmas needed for the structure wrapper.
* Definitions which used to return raw lambdas as partial functions now explicitly use `PFun.mk` or `PFun.lift`.
* Equality proofs for partial functions now use `PFun.ext` / `DFunLike.ext` where `funext` no longer applies directly.
### 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.
As a result, several proofs (e.g. `fix_aux`, `ppred`, `mem_eval`, and `unitIso`) grew in size, requiring explicit `ext` + `simp` breakdowns. I tried to keep these proof changes minimal; further golfing suggestions are very welcome. It seems that fully recovering the old brevity in some places may require additional `PFun`-specific API/congruence support, which I avoided adding in this PR to keep the diff minimal.
### Affected files
* **Core:** `Mathlib/Data/PFun.lean`
* **Computability:** `Partrec`, `PartrecBasis`, `PartrecCode`, `RE`, `RecursiveIn`, `Ackermann`, `StateTransition`, `TuringDegree`, `TuringMachine/Config`
* **Category Theory:** `Category/PartialFun.lean`
* **Other:** `Data/Finset/PImage.lean`, `NumberTheory/Dioph.lean`
This also removes the previous `set_option linter.flexible false` workaround and the local transparency workaround in `TuringMachine/Config.lean`, as well as the local transparency workarounds in `Category/PartialFun.lean`.
### Note on LLM usage
The core `PFun` change caused numerous downstream errors. I initially used an LLM to help draft fixes for these files. Afterwards, I spent a significant amount of time manually correcting and modifying all of the generated changes.
|
new-contributor
t-computability
tech debt
LLM-generated
|
546/486 |
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 |
40 |
['AlexeyMilovanov', 'JovanGerb', 'YaelDillies', 'dagurtomas', 'github-actions', 'j-loreaux', 'mathlib-bors', 'mathlib-merge-conflicts'] |
YaelDillies assignee:YaelDillies |
7-62019 7 days ago |
7-62019 7 days ago |
77-57201 77 days |
| 39388 |
marcelolynch author:marcelolynch |
chore: remove @[expose] from def-free public sections |
Strip `@[expose]` from `public section` headers in 136 modules where no declaration needs its body visible downstream. A new sweep in the style of #38480
Found using the linter-in-progress: #39387
Relevant Zulip thread: https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/Removing.20unnecessary.20.60.40.5Bexpose.5D.60/with/595180230 |
tech debt |
136/136 |
Mathlib/Algebra/Category/ModuleCat/ChangeOfRingsExact.lean,Mathlib/Algebra/Category/ModuleCat/Ext/Basic.lean,Mathlib/Algebra/Category/ModuleCat/Monoidal/Adjunction.lean,Mathlib/Algebra/Category/Ring/Small.lean,Mathlib/Algebra/EuclideanDomain/Basic.lean,Mathlib/Algebra/Field/Basic.lean,Mathlib/Algebra/Field/MinimalAxioms.lean,Mathlib/Algebra/Field/Opposite.lean,Mathlib/Algebra/Field/ULift.lean,Mathlib/Algebra/Field/ZMod.lean,Mathlib/Algebra/Group/Action/Option.lean,Mathlib/Algebra/Group/Action/Sigma.lean,Mathlib/Algebra/Group/Action/Sum.lean,Mathlib/Algebra/Group/Action/Units.lean,Mathlib/Algebra/Group/Subgroup/Actions.lean,Mathlib/Algebra/Group/Submonoid/MulAction.lean,Mathlib/Algebra/Homology/ModelCategory/Injective.lean,Mathlib/Algebra/Module/Projective.lean,Mathlib/Algebra/Module/Submodule/Basic.lean,Mathlib/Algebra/MonoidAlgebra/PointwiseSMul.lean,Mathlib/Algebra/NonAssoc/LieAdmissible/Defs.lean,Mathlib/Algebra/Notation/Prod.lean,Mathlib/Algebra/Order/Antidiag/Tendsto.lean,Mathlib/Algebra/Order/Floor/Div.lean,Mathlib/Algebra/Order/Group/Action/End.lean,Mathlib/Algebra/Order/Group/End.lean,Mathlib/Algebra/Order/Group/PosPart.lean,Mathlib/Algebra/Order/Kleene.lean,Mathlib/Algebra/Order/Pi.lean,Mathlib/Algebra/Ring/Commute.lean,Mathlib/Algebra/Star/TransferInstance.lean,Mathlib/AlgebraicGeometry/Birational/Dominant.lean,Mathlib/AlgebraicTopology/ModelCategory/Over.lean,Mathlib/AlgebraicTopology/SimplicialSet/AnodyneExtensions/Inner/PushoutProduct.lean,Mathlib/AlgebraicTopology/SimplicialSet/AnodyneExtensions/PushoutProduct.lean,Mathlib/Analysis/Calculus/TaylorIntegral.lean,Mathlib/Analysis/Normed/Algebra/TrivSqZeroExt.lean,Mathlib/Analysis/Normed/Group/Constructions.lean,Mathlib/Analysis/Normed/Module/MStructure.lean,Mathlib/Analysis/Normed/Operator/Compact/FiniteDimension.lean,Mathlib/Analysis/ODE/DiscreteGronwall.lean,Mathlib/Analysis/Polynomial/Norm.lean,Mathlib/CategoryTheory/Adjunction/ParametrizedLimits.lean,Mathlib/CategoryTheory/Comma/CatCommSq.lean,Mathlib/CategoryTheory/Localization/DerivabilityStructure/OfLocalizedEquivalences.lean,Mathlib/CategoryTheory/MarkovCategory/Positive.lean,Mathlib/CategoryTheory/Monoidal/Cartesian/Normal.lean,Mathlib/CategoryTheory/Monoidal/Functor/Types.lean,Mathlib/CategoryTheory/Monoidal/Types/Coyoneda.lean,Mathlib/CategoryTheory/Preadditive/Comma.lean,Mathlib/CategoryTheory/Preadditive/Injective/InjectiveObject.lean,Mathlib/CategoryTheory/Sites/CoversTop/Over.lean,Mathlib/CategoryTheory/Sites/Precoverage/Generates.lean,Mathlib/Combinatorics/Additive/FreimanHom.lean,Mathlib/Computability/AkraBazzi/AkraBazzi.lean,Mathlib/Data/ENNReal/Action.lean,Mathlib/Data/Fin/Init.lean,Mathlib/Data/Finsupp/Pointwise.lean,Mathlib/Data/FunLike/Basic.lean,Mathlib/Data/FunLike/Embedding.lean,Mathlib/Data/FunLike/Equiv.lean,Mathlib/Data/FunLike/Ring.lean,Mathlib/Data/Int/Cast/Pi.lean,Mathlib/Data/LawfulXor/Basic.lean,Mathlib/Data/List/Monad.lean,Mathlib/Data/Prod/Lex.lean,Mathlib/Data/Rat/Cast/Defs.lean,Mathlib/Data/Rat/Cast/OfScientific.lean,Mathlib/Data/ZMod/IntUnitsPower.lean,Mathlib/GroupTheory/Congruence/Star.lean,Mathlib/GroupTheory/GroupAction/Embedding.lean,Mathlib/GroupTheory/IsPerfect.lean,Mathlib/GroupTheory/MonoidLocalization/UniqueFactorization.lean,Mathlib/GroupTheory/ResiduallyFinite.lean,Mathlib/LinearAlgebra/CliffordAlgebra/Star.lean,Mathlib/LinearAlgebra/FreeModule/Finite/Matrix.lean,Mathlib/LinearAlgebra/InvariantBasisNumber.lean,Mathlib/LinearAlgebra/Matrix/GeneralLinearGroup/MvPolynomial.lean,Mathlib/LinearAlgebra/Matrix/HadamardMatrix.lean,Mathlib/LinearAlgebra/Projectivization/PSL/PSL2.lean,Mathlib/LinearAlgebra/RootSystem/GeckConstruction/Semisimple.lean,Mathlib/LinearAlgebra/Transvection/Generation.lean,Mathlib/MeasureTheory/Function/L2Space.lean,Mathlib/MeasureTheory/Function/LpSpace/CompleteOfCompleteLp.lean,Mathlib/MeasureTheory/Integral/IntegralEqImproper.lean,Mathlib/MeasureTheory/Measure/Sub.lean,Mathlib/MeasureTheory/Measure/Typeclasses/ZeroOne.lean,Mathlib/MeasureTheory/VectorMeasure/SetIntegral.lean,Mathlib/NumberTheory/ModularForms/EisensteinSeries/E2/Summable.lean,Mathlib/NumberTheory/ModularForms/EisensteinSeries/E2/Transform.lean,Mathlib/NumberTheory/NumberField/ExistsRamified.lean,Mathlib/NumberTheory/NumberField/Ideal/Asymptotics.lean,Mathlib/NumberTheory/Padics/PadicVal/Defs.lean,Mathlib/NumberTheory/RamificationInertia/Valuation.lean,Mathlib/Order/CompleteLattice/PiLex.lean,Mathlib/Order/Filter/FilterProduct.lean,Mathlib/Order/Interval/Finset/Floor.lean,Mathlib/Order/Interval/Set/OrdConnected.lean,Mathlib/Order/Northcott.lean,Mathlib/Order/Quotient.lean |
136 |
8 |
['eric-wieser', 'github-actions', 'grunweg', 'marcelolynch', 'mathlib-merge-conflicts', 'urkud'] |
JovanGerb assignee:JovanGerb |
6-53493 6 days ago |
10-79429 10 days ago |
26-16437 26 days |
| 42273 |
astrainfinita author:astrainfinita |
chore: remove `CovariantClass` and `ContravariantClass` |
This PR continues the work from #13124.
Original PR: https://github.com/leanprover-community/mathlib4/pull/13124 |
t-algebra
t-order
tech debt
label:t-algebra$ |
526/322 |
Mathlib/Algebra/AddConstMap/Basic.lean,Mathlib/Algebra/Algebra/Operations.lean,Mathlib/Algebra/Algebra/Subalgebra/Pointwise.lean,Mathlib/Algebra/Group/Subgroup/Pointwise.lean,Mathlib/Algebra/Group/Submonoid/Pointwise.lean,Mathlib/Algebra/Module/Submodule/Pointwise.lean,Mathlib/Algebra/Order/AddTorsor.lean,Mathlib/Algebra/Order/Group/Action.lean,Mathlib/Algebra/Order/GroupWithZero/Basic.lean,Mathlib/Algebra/Order/GroupWithZero/Defs.lean,Mathlib/Algebra/Order/Monoid/Defs.lean,Mathlib/Algebra/Order/Monoid/Unbundled/Basic.lean,Mathlib/Algebra/Order/Monoid/Unbundled/Defs.lean,Mathlib/Algebra/Order/Monoid/Unbundled/OrderDual.lean,Mathlib/Algebra/Order/Monoid/Unbundled/WithTop.lean,Mathlib/Algebra/Order/Quantale.lean,Mathlib/Algebra/Order/Ring/Canonical.lean,Mathlib/Algebra/Order/Ring/WithTop.lean,Mathlib/Algebra/Ring/Subring/Pointwise.lean,Mathlib/Algebra/Ring/Subsemiring/Pointwise.lean,Mathlib/Analysis/RCLike/Basic.lean,Mathlib/Analysis/SumOverResidueClass.lean,Mathlib/Data/ENNReal/Action.lean,Mathlib/Data/EReal/Inv.lean,Mathlib/GroupTheory/OrderOfElement.lean,Mathlib/MeasureTheory/Measure/MeasureSpace.lean,Mathlib/Order/Filter/Pointwise.lean,Mathlib/RingTheory/DedekindDomain/Ideal/Basic.lean,Mathlib/RingTheory/Ideal/Pointwise.lean,Mathlib/RingTheory/Valuation/ValuationSubring.lean |
30 |
7 |
['astrainfinita', 'github-actions', 'leanprover-radar', 'vihdzp'] |
nobody |
6-2072 6 days ago |
7-4420 7 days ago |
7-7587 7 days |
| 42367 |
plp127 author:plp127 |
chore: remove `IsDedekindDomainDvr` |
Remove `IsDedekindDomainDvr`, because is the same as `IsDedekindDomain`. See [Zulip](https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/three.20dedekind.20domains/near/574535735).
---
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t-ring-theory
tech debt
|
47/65 |
Mathlib/NumberTheory/NumberField/ExistsRamified.lean,Mathlib/RingTheory/DedekindDomain/Dvr.lean,Mathlib/RingTheory/Trace/Quotient.lean,Mathlib/RingTheory/Unramified/Dedekind.lean |
4 |
4 |
['github-actions', 'kbuzzard', 'plp127'] |
nobody |
5-84779 5 days ago |
6-44251 6 days ago |
6-44392 6 days |
| 42394 |
SnirBroshi author:SnirBroshi |
fix(Algebra/GroupWithZero/Associated): de-`abbrev` `Associates` |
`Associates` is an `abbrev` for `Quotient _`, but there are many `instance`s defined on it.
Some of them create diamonds with general `Quotient` instances: `Inhabited`, `Unique`, and most notably `Preorder`.
While `Associates` has a `Preorder` instance that uses the divisibility relation, any monoid with a `Preorder` will have its ordering lifted to the `Quotient`. So currently `Associates ℕ` has two different `LE` orders defined on it that disagree on `2 ≤ 3`.
This changes `Associates` to a `def` tagged with `@[implicit_reducible]`.
---
The `nonZeroDivisors` proof is now a bit awkward, since the `Equiv` works for `Quotient`s but `simp` refuses to evaluate the `Equiv` because `Associate` elements are multiplied but `Quotient` doesn't have that multiplication. Though `rw` works thanks to `@[implicit_reducible]`.
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|
t-ring-theory
tech debt
|
26/11 |
Mathlib/Algebra/GroupWithZero/Associated.lean,Mathlib/Algebra/GroupWithZero/NonZeroDivisors.lean,Mathlib/RingTheory/Ideal/IsPrincipal.lean |
3 |
1 |
['github-actions'] |
nobody |
5-38680 5 days ago |
5-41217 5 days ago |
5-43270 5 days |
| 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 |
329/413 |
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/Convex/Combination.lean,Mathlib/Analysis/InnerProductSpace/Projection/FiniteDimensional.lean,Mathlib/Analysis/Seminorm.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/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/AffineSpace/AffineSubspace/Defs.lean,Mathlib/LinearAlgebra/Basis/Exact.lean,Mathlib/LinearAlgebra/LinearIndependent/Lemmas.lean,Mathlib/Logic/Equiv/Set.lean,Mathlib/MeasureTheory/Covering/LiminfLimsup.lean,Mathlib/MeasureTheory/MeasurableSpace/CountablyGenerated.lean,Mathlib/MeasureTheory/Measure/Decomposition/Hahn.lean,Mathlib/MeasureTheory/Measure/Haar/Unique.lean,Mathlib/MeasureTheory/Measure/MeasureSpace.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/Filter/Bases/Basic.lean,Mathlib/Order/Filter/Basic.lean,Mathlib/Order/Filter/Defs.lean,Mathlib/Order/Lattice.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 |
97 |
8 |
['JovanGerb', 'github-actions', 'leanprover-radar', 'mathlib-merge-conflicts'] |
nobody |
4-83757 4 days ago |
5-8000 5 days ago |
5-23910 5 days |
| 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 |
1 |
['github-actions'] |
nobody |
4-79720 4 days ago |
5-6566 5 days ago |
5-6342 5 days |
| 42439 |
xroblot author:xroblot |
feat(Algebra/QuadraticAlgebra): injectivity and surjectivity of `lift` |
Add API for the algebra map `QuadraticAlgebra.lift`:
* `range_lift`: its range is the subalgebra generated by `u`;
* `lift_surjective_iff`: surjective iff `u` generates the algebra;
* `lift_injective_iff`: injective iff `1` and `u` are linearly independent.
Also add the basis decomposition `re_smul_add_im_smul` (used to golf `algHom_ext`)
and `adjoin_omega_eq_top`. |
t-algebra
tech debt
label:t-algebra$ |
39/3 |
Mathlib/Algebra/QuadraticAlgebra/Basic.lean |
1 |
1 |
['github-actions'] |
nobody |
4-7827 4 days ago |
4-8436 4 days ago |
4-8212 4 days |
| 38664 |
joelriou author:joelriou |
feat(AlgebraicTopology/SimplicialSet): more API for `SSet.op` |
---
- [x] depends on: #38662
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|
t-algebraic-topology
tech debt
maintainer-merge
|
136/36 |
Mathlib/AlgebraicTopology/SimplexCategory/Rev.lean,Mathlib/AlgebraicTopology/SimplicialObject/Op.lean,Mathlib/AlgebraicTopology/SimplicialSet/KanComplex/MulStruct.lean,Mathlib/AlgebraicTopology/SimplicialSet/Op.lean,Mathlib/AlgebraicTopology/SimplicialSet/StdSimplex.lean |
5 |
18 |
['github-actions', 'joelriou', 'mathlib-dependent-issues', 'mathlib-merge-conflicts', 'robin-carlier'] |
dagurtomas assignee:dagurtomas |
3-72258 3 days ago |
3-73474 3 days ago |
42-81530 42 days |
| 42455 |
plp127 author:plp127 |
feat: partial sections for `Filter.Product` |
Change the definition of `Filter.Product` to only use partial functions defined in some neighborhood of `l`. This is mathematically the correct definition, and differs from the previous definition in that with the previous definition `IsEmpty (l.Product ε) ↔ ∃ x : α, IsEmpty (ε x)` but with the new definition `IsEmpty (l.Product ε) ↔ ∃ᶠ x in l, IsEmpty (ε x)`. See [Zulip](https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/Non-standard.20analysis/near/572530042). See also #36763.
---
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|
tech debt |
1094/479 |
Mathlib/Analysis/Real/Hyperreal.lean,Mathlib/MeasureTheory/Function/AEEqFun.lean,Mathlib/MeasureTheory/Function/SimpleFuncDenseLp.lean,Mathlib/MeasureTheory/Integral/SetToL1.lean,Mathlib/ModelTheory/Ultraproducts.lean,Mathlib/Order/Filter/FilterProduct.lean,Mathlib/Order/Filter/Germ/Basic.lean,Mathlib/Order/Filter/Germ/OrderedMonoid.lean,Mathlib/Order/Filter/Ring.lean,Mathlib/Topology/Germ.lean |
10 |
1 |
['github-actions'] |
nobody |
3-57733 3 days ago |
3-58631 3 days ago |
3-60104 3 days |
| 41717 |
SnirBroshi author:SnirBroshi |
feat(Combinatorics/SimpleGraph/Walk): more `transfer` API |
---
The Hamiltonian lemmas don't really need `Finite`; I'll fix this after #41435 (in whichever merges second).
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|
t-combinatorics
tech debt
|
54/23 |
Mathlib/Combinatorics/SimpleGraph/Acyclic.lean,Mathlib/Combinatorics/SimpleGraph/Hamiltonian.lean,Mathlib/Combinatorics/SimpleGraph/Paths.lean,Mathlib/Combinatorics/SimpleGraph/Walk/Maps.lean |
4 |
1 |
['github-actions'] |
JovanGerb assignee:JovanGerb |
3-53485 3 days ago |
25-39547 25 days ago |
25-39426 25 days |
| 38018 |
matthewjasper author:matthewjasper |
feat(Algebra): expand Subalgebra.restrictScalars API |
Add an instance for the original algebra structure, the implied scalar tower instances, and the algebra equivalence with the original subalgebra. Use this to remove some `set_option backward.isDefEq.respectTransparency`.
---
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|
t-ring-theory
tech debt
|
61/15 |
Mathlib/Algebra/Algebra/Subalgebra/Tower.lean,Mathlib/RingTheory/AlgebraicIndependent/TranscendenceBasis.lean,Mathlib/RingTheory/Finiteness/Basic.lean,Mathlib/RingTheory/IntegralClosure/IsIntegralClosure/Basic.lean |
4 |
17 |
['eric-wieser', 'github-actions', 'kbuzzard', 'leanprover-radar', 'mariainesdff', 'mathlib-merge-conflicts', 'matthewjasper'] |
nobody |
3-52589 3 days ago |
24-60917 24 days ago |
99-26571 99 days |
| 42463 |
vihdzp author:vihdzp |
chore: fix all instances of `linter.defProp` |
I've omitted the `MathlibTest` folder, since it's a bit difficult to tell which of those usages are intended.
---
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|
tech debt |
18/25 |
Mathlib/CategoryTheory/Category/Preorder.lean,Mathlib/Combinatorics/Hindman.lean,Mathlib/Computability/Partrec.lean,Mathlib/Computability/Primrec/Basic.lean,Mathlib/Data/Nat/Find.lean,Mathlib/NumberTheory/Padics/Hensel.lean |
6 |
1 |
['github-actions'] |
nobody |
3-44463 3 days ago |
3-46754 3 days ago |
3-46792 3 days |
| 42398 |
gasparattila author:gasparattila |
feat: add a wrapper around `fun_prop` that calls `simp` on the function |
This new tactic is used for the `autoParam` tactics of `Homeomorph`, etc. These `autoParam`s currently use `dsimp`, which often requires the use of `backward.defeqAttrib.useBackward`, since `simps` tags lemmas with `@[backward_defeq]`. It also prevents the use of general lemmas such as `IsAddApply.add_apply`, which cannot hold definitionally.
This PR also removes the `backward.defeqAttrib.useBackward` options which become unnecessary as a result of this change.
---
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|
t-topology
t-meta
tech debt
|
52/26 |
Mathlib.lean,Mathlib/Tactic.lean,Mathlib/Tactic/FunPropSimp.lean,Mathlib/Topology/Algebra/Group/Basic.lean,Mathlib/Topology/Algebra/Module/ContinuousLinearMap/Basic.lean,Mathlib/Topology/Algebra/Module/ContinuousLinearMap/PiProd.lean,Mathlib/Topology/Algebra/Module/Equiv.lean,Mathlib/Topology/Algebra/Module/Multilinear/Basic.lean,Mathlib/Topology/Algebra/Module/Star.lean,Mathlib/Topology/Constructions/SumProd.lean,Mathlib/Topology/Homeomorph/Defs.lean,Mathlib/Topology/Homeomorph/Lemmas.lean |
12 |
27 |
['JovanGerb', 'gasparattila', 'github-actions', 'grunweg', 'leanprover-radar'] |
thorimur assignee:thorimur |
2-76536 2 days ago |
2-78464 2 days ago |
5-3048 5 days |
| 42193 |
sgouezel author:sgouezel |
chore: fix defeq abuse in the definition of MFDeriv |
---
- [x] depends on: ##42374
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|
t-differential-geometry
tech debt
|
136/58 |
Mathlib/Geometry/Manifold/ContMDiffMFDeriv.lean,Mathlib/Geometry/Manifold/IntegralCurve/UniformTime.lean,Mathlib/Geometry/Manifold/IsManifold/Basic.lean,Mathlib/Geometry/Manifold/LocalDiffeomorph.lean,Mathlib/Geometry/Manifold/MFDeriv/Atlas.lean,Mathlib/Geometry/Manifold/MFDeriv/Basic.lean,Mathlib/Geometry/Manifold/MFDeriv/Defs.lean,Mathlib/Geometry/Manifold/MFDeriv/FDeriv.lean,Mathlib/Geometry/Manifold/MFDeriv/Tangent.lean |
9 |
25 |
['github-actions', 'grunweg', 'kbuzzard', 'mathlib-bors', 'sgouezel'] |
nobody |
2-64975 2 days ago |
6-70987 6 days ago |
6-70873 6 days |
| 42448 |
Whysoserioushah author:Whysoserioushah |
chore(Algebra/Homology/HomotopyCategory/Shift): clean up most of set_options |
If we want every `set_option` gone from this file, especially gone from this instance: `CategoryTheory.Functor.commShiftMapCochainComplex` then we need to set the reducibility of `Functor.mapHomologicalComplex` into reducible, this together with [ContCohomology](https://github.com/leanprover-community/mathlib4/blob/master/Mathlib/RepresentationTheory/Homological/ContCohomology/Basic.lean#L109) may indicate that we want it as an `abbrev`.
---
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|
tech debt
t-algebra
t-category-theory
label:t-algebra$ |
75/206 |
Mathlib/Algebra/Homology/HomotopyCategory/DegreewiseSplit.lean,Mathlib/Algebra/Homology/HomotopyCategory/HomComplexShift.lean,Mathlib/Algebra/Homology/HomotopyCategory/Pretriangulated.lean,Mathlib/Algebra/Homology/HomotopyCategory/Shift.lean,Mathlib/Algebra/Homology/HomotopyCategory/Triangulated.lean |
5 |
9 |
['Whysoserioushah', 'github-actions', 'joelriou', 'leanprover-radar'] |
riccardobrasca assignee:riccardobrasca |
2-27903 2 days ago |
3-13599 3 days ago |
3-18108 3 days |
| 42034 |
grunweg author:grunweg |
chore(Geometry/Manifold): remove "easy" cases of defeq abuse |
Remove many uses of the `backward.isDefeq.respectTransparency` option in differential geometry.
- a number of options are simply superfluous now (hence can be removed)
- some cases could be fixed by adding `chartAt_self_eq` to a simp call --- should this be made simp?
- using `NormedSpace.fromTangentSpace` and `mvfderiv` allowed fixing a few options in `VectorBundle/Riemannian`
- a few proofs simply needed to be slightly more careful, and then also worked without the defeq abuse
---
- [x] depends on: #42031
- [x] depends on: #42038
Best reviewed commit by commit: the individual commit messages contain slightly more detail.
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|
t-differential-geometry
tech debt
|
21/34 |
Mathlib/Geometry/Manifold/ContMDiff/Atlas.lean,Mathlib/Geometry/Manifold/ContMDiff/Basic.lean,Mathlib/Geometry/Manifold/IsManifold/Basic.lean,Mathlib/Geometry/Manifold/IsManifold/ExtChartAt.lean,Mathlib/Geometry/Manifold/MFDeriv/NormedSpace.lean,Mathlib/Geometry/Manifold/MFDeriv/SpecificFunctions.lean,Mathlib/Geometry/Manifold/Riemannian/Basic.lean |
7 |
3 |
['github-actions', 'grunweg', 'mathlib-dependent-issues'] |
nobody |
2-23311 2 days ago |
10-66893 10 days ago |
11-70215 11 days |
| 42075 |
Parcly-Taxel author:Parcly-Taxel |
chore: delete deprecated declarations/modules from January 2026 |
`Mathlib.Util.MemoFix` is directly removed since all deprecations in it are more than 6 months old. |
tech debt
file-removed
maintainer-merge
|
1/2758 |
Mathlib.lean,Mathlib/Algebra/Algebra/Basic.lean,Mathlib/Algebra/Algebra/Epi.lean,Mathlib/Algebra/Algebra/NonUnitalSubalgebra.lean,Mathlib/Algebra/BigOperators/Finprod.lean,Mathlib/Algebra/Category/ModuleCat/Semi.lean,Mathlib/Algebra/Category/Ring/Epi.lean,Mathlib/Algebra/Group/Basic.lean,Mathlib/Algebra/Group/Int/Defs.lean,Mathlib/Algebra/GroupWithZero/Action/Defs.lean,Mathlib/Algebra/GroupWithZero/Basic.lean,Mathlib/Algebra/GroupWithZero/Defs.lean,Mathlib/Algebra/GroupWithZero/Int.lean,Mathlib/Algebra/GroupWithZero/NonZeroDivisors.lean,Mathlib/Algebra/GroupWithZero/Regular.lean,Mathlib/Algebra/ModEq.lean,Mathlib/Algebra/Module/Hom.lean,Mathlib/Algebra/Module/LinearMap/End.lean,Mathlib/Algebra/NoZeroSMulDivisors/Prod.lean,Mathlib/Algebra/Order/Archimedean/Real/Basic.lean,Mathlib/Algebra/Polynomial/Degree/Definitions.lean,Mathlib/Algebra/Polynomial/Splits.lean,Mathlib/Algebra/Ring/Regular.lean,Mathlib/AlgebraicGeometry/Artinian.lean,Mathlib/AlgebraicGeometry/Cover/MorphismProperty.lean,Mathlib/AlgebraicGeometry/Morphisms/ClosedImmersion.lean,Mathlib/AlgebraicGeometry/Morphisms/FinitePresentation.lean,Mathlib/AlgebraicGeometry/Morphisms/FiniteType.lean,Mathlib/AlgebraicGeometry/Morphisms/Flat.lean,Mathlib/AlgebraicGeometry/Morphisms/FormallyUnramified.lean,Mathlib/AlgebraicGeometry/Morphisms/OpenImmersion.lean,Mathlib/AlgebraicGeometry/Morphisms/Preimmersion.lean,Mathlib/AlgebraicGeometry/Morphisms/Separated.lean,Mathlib/AlgebraicGeometry/Morphisms/SurjectiveOnStalks.lean,Mathlib/AlgebraicGeometry/Morphisms/UniversallyClosed.lean,Mathlib/AlgebraicGeometry/Morphisms/UniversallyOpen.lean,Mathlib/AlgebraicTopology/FundamentalGroupoid/SimplyConnected.lean,Mathlib/AlgebraicTopology/ModelCategory/CofibrantObjectHomotopy.lean,Mathlib/Analysis/Analytic/Composition.lean,Mathlib/Analysis/Asymptotics/AsymptoticEquivalent.lean,Mathlib/Analysis/Calculus/Deriv/Mul.lean,Mathlib/Analysis/Calculus/FDeriv/Add.lean,Mathlib/Analysis/Calculus/Implicit.lean,Mathlib/Analysis/Calculus/ImplicitContDiff.lean,Mathlib/Analysis/Calculus/TangentCone/Basic.lean,Mathlib/Analysis/Complex/IntegerCompl.lean,Mathlib/Analysis/Complex/Schwarz.lean,Mathlib/Analysis/Complex/TaylorSeries.lean,Mathlib/Analysis/Complex/UnitDisc/Basic.lean,Mathlib/Analysis/Complex/UpperHalfPlane/Basic.lean,Mathlib/Analysis/Convex/Body.lean,Mathlib/Analysis/Distribution/FourierSchwartz.lean,Mathlib/Analysis/Distribution/SchwartzSpace.lean,Mathlib/Analysis/Distribution/SchwartzSpace/Fourier.lean,Mathlib/Analysis/Distribution/TemperedDistribution.lean,Mathlib/Analysis/Fourier/Notation.lean,Mathlib/Analysis/InnerProductSpace/Orthogonal.lean,Mathlib/Analysis/InnerProductSpace/PiL2.lean,Mathlib/Analysis/LocallyConvex/Barrelled.lean,Mathlib/Analysis/Matrix/Spectrum.lean,Mathlib/Analysis/Normed/Group/Basic.lean,Mathlib/Analysis/Normed/Group/Pointwise.lean,Mathlib/Analysis/Normed/Module/Ball/Pointwise.lean,Mathlib/Analysis/Normed/Order/Basic.lean,Mathlib/Analysis/Normed/Unbundled/SeminormFromConst.lean,Mathlib/Analysis/Polynomial/MahlerMeasure.lean,Mathlib/Analysis/Real/Hyperreal.lean,Mathlib/Analysis/SpecialFunctions/Complex/Log.lean,Mathlib/Analysis/SpecialFunctions/NonIntegrable.lean,Mathlib/Analysis/SpecialFunctions/Trigonometric/Cotangent.lean,Mathlib/CategoryTheory/Adjunction/Opposites.lean,Mathlib/CategoryTheory/Category/Grpd.lean,Mathlib/CategoryTheory/Limits/Shapes/Products.lean,Mathlib/CategoryTheory/Limits/Shapes/Pullback/CommSq.lean,Mathlib/CategoryTheory/Limits/Shapes/Pullback/Equifibered.lean,Mathlib/CategoryTheory/MorphismProperty/Basic.lean,Mathlib/CategoryTheory/Sites/IsSheafFor.lean,Mathlib/CategoryTheory/Triangulated/TStructure/Basic.lean,Mathlib/Combinatorics/SimpleGraph/AdjMatrix.lean,Mathlib/Combinatorics/SimpleGraph/Coloring/Vertex.lean,Mathlib/Combinatorics/SimpleGraph/VertexCover.lean,Mathlib/Computability/Primrec.lean,Mathlib/Computability/Primrec/Basic.lean,Mathlib/Data/Finsupp/Basic.lean,Mathlib/Data/Fintype/Prod.lean,Mathlib/Data/Int/ModEq.lean,Mathlib/Data/List/Basic.lean,Mathlib/Data/List/Flatten.lean,Mathlib/Data/List/GetD.lean,Mathlib/Data/Option/Basic.lean,Mathlib/Data/Option/Defs.lean,Mathlib/Data/Set/Card.lean,Mathlib/Data/SetLike/Basic.lean,Mathlib/Data/Tree/RBMap.lean,Mathlib/FieldTheory/Isaacs.lean,Mathlib/Geometry/Manifold/PartitionOfUnity.lean,Mathlib/Geometry/Manifold/Riemannian/Basic.lean,Mathlib/Lean/Expr.lean,Mathlib/Lean/Expr/ReplaceRec.lean,Mathlib/LinearAlgebra/AffineSpace/AffineSubspace/Basic.lean |
184 |
5 |
['Parcly-Taxel', 'github-actions', 'grunweg', 'joneugster', 'mathlib-merge-conflicts'] |
joneugster assignee:joneugster |
1-41740 1 day ago |
1-45352 1 day ago |
13-83647 13 days |
| 42291 |
JovanGerb author:JovanGerb |
feat: generalize transfer instance type class assumptions |
This PR refactors various declarations that are used for transporting instances or definitions along equivalences. The idea is to avoid using local instances with `letI` in places where we can assume an arbitrary instance instead, because otherwise these declarations can only be used in situations where the global instance is defeq to the one introduced by `letI`. In many cases this means that the equivalence needs to be an `AddEquiv` or `LinearEquiv` instead of an `Equiv`. This is not an issue in practice, because it is typically easy to construct this richer equivalence.
It would be possible to keep both styles of transporting declarations, but I think that would be more confusing.
This PR is a prerequisite for #41362 (no_exposing some operations in `MonoidAlgebra`), because to use the old `Equiv.distribMulAction` we need the `MonoidAlgebra` instances to be exposed.
---
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|
tech debt |
201/277 |
Mathlib/Algebra/Algebra/Unitization.lean,Mathlib/Algebra/Category/Grp/Colimits.lean,Mathlib/Algebra/Category/ModuleCat/Topology/Basic.lean,Mathlib/Algebra/Group/Shrink.lean,Mathlib/Algebra/GroupWithZero/Action/TransferInstance.lean,Mathlib/Algebra/GroupWithZero/Shrink.lean,Mathlib/Algebra/Homology/DerivedCategory/Ext/Linear.lean,Mathlib/Algebra/Lie/Extension.lean,Mathlib/Algebra/Lie/SemiDirect.lean,Mathlib/Algebra/Lie/TransferInstance.lean,Mathlib/Algebra/Module/Shrink.lean,Mathlib/Algebra/Module/TransferInstance.lean,Mathlib/Algebra/MonoidAlgebra/Defs.lean,Mathlib/Algebra/MonoidAlgebra/Module.lean,Mathlib/Algebra/Polynomial/Module/Basic.lean,Mathlib/Algebra/Quaternion.lean,Mathlib/Algebra/WithConv.lean,Mathlib/Analysis/LocallyConvex/WeakOperatorTopology.lean,Mathlib/Analysis/Normed/Lp/WithLp.lean,Mathlib/Analysis/Normed/Module/Shrink.lean,Mathlib/Analysis/Normed/Module/TransferInstance.lean,Mathlib/Analysis/Normed/Ring/WithAbs.lean,Mathlib/CategoryTheory/Linear/Basic.lean,Mathlib/Geometry/Manifold/Immersion.lean,Mathlib/Geometry/Manifold/Submersion.lean,Mathlib/LinearAlgebra/TensorProduct/Associator.lean,Mathlib/LinearAlgebra/TensorProduct/Map.lean,Mathlib/RepresentationTheory/Continuous/TopRep.lean,Mathlib/RingTheory/Coalgebra/Basic.lean,Mathlib/RingTheory/Coalgebra/MonoidAlgebra.lean,Mathlib/RingTheory/OrzechProperty.lean,Mathlib/Topology/Algebra/Module/TransferInstance.lean,Mathlib/Topology/Algebra/Valued/WithVal.lean |
33 |
6 |
['JovanGerb', 'github-actions', 'leanprover-radar', 'mathlib-merge-conflicts'] |
nobody |
0-85168 23 hours ago |
1-1323 1 day ago |
8-4537 8 days |
| 42179 |
FrankieNC author:FrankieNC |
chore(Logic): remove all `backward.isDefEq.respectTransparency` and `backward.defeqAttrib` options |
This removes all remaining `backward.isDefEq.respectTransparency` (and `.types`) options from `Mathlib/Logic`, as well as the two `backward.defeqAttrib.useBackward` ones. Most were stale and could just be deleted.
Three proofs needed actual fixing: `uniqueEmbeddingEquivResult` and `image_symm_preimage` now avoid unfolding through the coercions, and in the `sigmaSigmaSubtype` section it suffices to add `subtypeEquiv` to the local simp set (this also gives `sigmaSigmaSubtype_apply` a nicer form, and makes the `defeqAttrib` options unneeded).
The simps lemmas of `ofPreimageEquiv` change shape slightly; their only user, `HomOrthogonal.lean`, is unaffected. |
tech debt
t-logic
|
10/33 |
Mathlib/Logic/Embedding/Set.lean,Mathlib/Logic/Equiv/Basic.lean,Mathlib/Logic/Equiv/Embedding.lean,Mathlib/Logic/Equiv/Fin/Basic.lean,Mathlib/Logic/Equiv/Fintype.lean,Mathlib/Logic/Equiv/Option.lean,Mathlib/Logic/Equiv/Set.lean,Mathlib/Logic/Small/Defs.lean |
8 |
10 |
['FrankieNC', 'felixpernegger', 'github-actions'] |
nobody |
0-62890 17 hours ago |
11-10693 11 days ago |
11-13825 11 days |
| 42564 |
thorimur author:thorimur |
chore(OreLocalization): clean up `backward.privateInPublic` |
1. Refactors `OreLocalization.smul` to use `let`s instead of private declarations. (Inlines a private def in the type of a private theorem as well.)
2. `private`s the fields of `LocalizedModule.moduleOfIsLocalization`. (`@[no_expose]`ing breaks things later in the file, since the field bodies would still be private in that case.)
---
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|
tech debt
t-group-theory
|
38/58 |
Mathlib/Algebra/Module/LocalizedModule/Basic.lean,Mathlib/GroupTheory/OreLocalization/Basic.lean |
2 |
3 |
['github-actions', 'leanprover-radar', 'thorimur'] |
nobody |
0-26832 7 hours ago |
0-33090 9 hours ago |
0-32866 9 hours |
| 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
|
156/6 |
Mathlib/Order/RelSeries.lean |
1 |
1 |
['github-actions'] |
nobody |
0-25847 7 hours ago |
0-27545 7 hours ago |
0-39968 11 hours |
| 42557 |
thorimur author:thorimur |
chore: remove some `backward.privateInPublic` by adjusting visibility |
This PR removes a batch of `set_option backward.privateInPublic true` by adjusting visibility according to the following rules:
1. If a theorem is about an already-private definition, it too may as well be private.
2. We can `@[no_expose]` defs that use private definitions
3. We can private definitions that have no consumers besides an exposed body
---
Disclosure: I told Claude to undo the changes to GroupTheory.OreLocalization.Basic so I didn't need to write out the git command 🙃 The rest is manual.
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|
tech debt
maintainer-merge
|
21/73 |
Mathlib/Computability/Partrec.lean,Mathlib/Data/Fin/Tuple/Basic.lean,Mathlib/Data/Fintype/EquivFin.lean,Mathlib/Data/Nat/Find.lean,Mathlib/Data/Nat/Prime/Defs.lean,Mathlib/Data/Seq/Parallel.lean,Mathlib/Logic/Denumerable.lean,Mathlib/Logic/Encodable/Basic.lean,Mathlib/Logic/Equiv/Multiset.lean,Mathlib/Logic/Godel/GodelBetaFunction.lean,Mathlib/Order/DirectedInverseSystem.lean,Mathlib/Order/Lattice/Congruence.lean |
12 |
3 |
['JovanGerb', 'github-actions'] |
nobody |
0-1038 17 minutes ago |
0-36392 10 hours ago |
0-38640 10 hours |